drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  59         "when ready "
  60         "\"enabled\" (default) - initiator mode will always stay enabled.");
  61
  62 static int ql_dm_tgt_ex_pct = 0;
  63 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  64 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  65         "For Dual Mode (qlini_mode=dual), this parameter determines "
  66         "the percentage of exchanges/cmds FW will allocate resources "
  67         "for Target mode.");
  68
  69 int ql2xuctrlirq = 1;
  70 module_param(ql2xuctrlirq, int, 0644);
  71 MODULE_PARM_DESC(ql2xuctrlirq,
  72     "User to control IRQ placement via smp_affinity."
  73     "Valid with qlini_mode=disabled."
  74     "1(default): enable");
  75
  76 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  77
  78 static int qla_sam_status = SAM_STAT_BUSY;
  79 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  80
  81 /*
  82  * From scsi/fc/fc_fcp.h
  83  */
  84 enum fcp_resp_rsp_codes {
  85         FCP_TMF_CMPL = 0,
  86         FCP_DATA_LEN_INVALID = 1,
  87         FCP_CMND_FIELDS_INVALID = 2,
  88         FCP_DATA_PARAM_MISMATCH = 3,
  89         FCP_TMF_REJECTED = 4,
  90         FCP_TMF_FAILED = 5,
  91         FCP_TMF_INVALID_LUN = 9,
  92 };
  93
  94 /*
  95  * fc_pri_ta from scsi/fc/fc_fcp.h
  96  */
  97 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  98 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  99 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
 100 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
 101 #define FCP_PTA_MASK        7   /* mask for task attribute field */
 102 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
 103 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
 104
 105 /*
 106  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
 107  * must be called under HW lock and could unlock/lock it inside.
 108  * It isn't an issue, since in the current implementation on the time when
 109  * those functions are called:
 110  *
 111  *   - Either context is IRQ and only IRQ handler can modify HW data,
 112  *     including rings related fields,
 113  *
 114  *   - Or access to target mode variables from struct qla_tgt doesn't
 115  *     cross those functions boundaries, except tgt_stop, which
 116  *     additionally protected by irq_cmd_count.
 117  */
 118 /* Predefs for callbacks handed to qla2xxx LLD */
 119 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 120         struct atio_from_isp *pkt, uint8_t);
 121 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 122         response_t *pkt);
 123 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 124         int fn, void *iocb, int flags);
 125 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 126         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 127 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 128         struct atio_from_isp *atio, uint16_t status, int qfull);
 129 static void qlt_disable_vha(struct scsi_qla_host *vha);
 130 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 131 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 132         struct imm_ntfy_from_isp *ntfy,
 133         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 134         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 135 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 136         struct imm_ntfy_from_isp *imm, int ha_locked);
 137 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 138         fc_port_t *fcport, bool local);
 139 void qlt_unreg_sess(struct fc_port *sess);
 140 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 141         struct abts_recv_from_24xx *);
 142 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 143     uint16_t);
 144
 145 /*
 146  * Global Variables
 147  */
 148 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 149 struct kmem_cache *qla_tgt_plogi_cachep;
 150 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 151 static struct workqueue_struct *qla_tgt_wq;
 152 static DEFINE_MUTEX(qla_tgt_mutex);
 153 static LIST_HEAD(qla_tgt_glist);
 154
 155 static const char *prot_op_str(u32 prot_op)
 156 {
 157         switch (prot_op) {
 158         case TARGET_PROT_NORMAL:        return "NORMAL";
 159         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 160         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 161         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 162         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 163         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 164         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 165         default:                        return "UNKNOWN";
 166         }
 167 }
 168
 169 /* This API intentionally takes dest as a parameter, rather than returning
 170  * int value to avoid caller forgetting to issue wmb() after the store */
 171 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 172 {
 173         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 174         *dest = atomic_inc_return(&base_vha->generation_tick);
 175         /* memory barrier */
 176         wmb();
 177 }
 178
 179 /* Might release hw lock, then reaquire!! */
 180 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 181 {
 182         /* Send marker if required */
 183         if (unlikely(vha->marker_needed != 0)) {
 184                 int rc = qla2x00_issue_marker(vha, vha_locked);
 185                 if (rc != QLA_SUCCESS) {
 186                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 187                             "qla_target(%d): issue_marker() failed\n",
 188                             vha->vp_idx);
 189                 }
 190                 return rc;
 191         }
 192         return QLA_SUCCESS;
 193 }
 194
 195 static inline
 196 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 197         uint8_t *d_id)
 198 {
 199         struct scsi_qla_host *host;
 200         uint32_t key = 0;
 201
 202         if ((vha->d_id.b.area == d_id[1]) && (vha->d_id.b.domain == d_id[0]) &&
 203             (vha->d_id.b.al_pa == d_id[2]))
 204                 return vha;
 205
 206         key  = (uint32_t)d_id[0] << 16;
 207         key |= (uint32_t)d_id[1] <<  8;
 208         key |= (uint32_t)d_id[2];
 209
 210         host = btree_lookup32(&vha->hw->tgt.host_map, key);
 211         if (!host)
 212                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 213                     "Unable to find host %06x\n", key);
 214
 215         return host;
 216 }
 217
 218 static inline
 219 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 220         uint16_t vp_idx)
 221 {
 222         struct qla_hw_data *ha = vha->hw;
 223
 224         if (vha->vp_idx == vp_idx)
 225                 return vha;
 226
 227         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 228         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 229                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 230
 231         return NULL;
 232 }
 233
 234 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 235 {
 236         unsigned long flags;
 237
 238         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 239
 240         vha->hw->tgt.num_pend_cmds++;
 241         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 242                 vha->qla_stats.stat_max_pend_cmds =
 243                         vha->hw->tgt.num_pend_cmds;
 244         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 245 }
 246 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 247 {
 248         unsigned long flags;
 249
 250         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 251         vha->hw->tgt.num_pend_cmds--;
 252         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 253 }
 254
 255
 256 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 257         struct atio_from_isp *atio, uint8_t ha_locked)
 258 {
 259         struct qla_tgt_sess_op *u;
 260         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 261         unsigned long flags;
 262
 263         if (tgt->tgt_stop) {
 264                 ql_dbg(ql_dbg_async, vha, 0x502c,
 265                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 266                     vha->vp_idx);
 267                 goto out_term;
 268         }
 269
 270         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 271         if (u == NULL)
 272                 goto out_term;
 273
 274         u->vha = vha;
 275         memcpy(&u->atio, atio, sizeof(*atio));
 276         INIT_LIST_HEAD(&u->cmd_list);
 277
 278         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 279         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 280         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 281
 282         schedule_delayed_work(&vha->unknown_atio_work, 1);
 283
 284 out:
 285         return;
 286
 287 out_term:
 288         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 289         goto out;
 290 }
 291
 292 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 293         uint8_t ha_locked)
 294 {
 295         struct qla_tgt_sess_op *u, *t;
 296         scsi_qla_host_t *host;
 297         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 298         unsigned long flags;
 299         uint8_t queued = 0;
 300
 301         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 302                 if (u->aborted) {
 303                         ql_dbg(ql_dbg_async, vha, 0x502e,
 304                             "Freeing unknown %s %p, because of Abort\n",
 305                             "ATIO_TYPE7", u);
 306                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 307                             &u->atio, ha_locked, 0);
 308                         goto abort;
 309                 }
 310
 311                 host = qlt_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 312                 if (host != NULL) {
 313                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 314                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 315                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 316                 } else if (tgt->tgt_stop) {
 317                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 318                             "Freeing unknown %s %p, because tgt is being stopped\n",
 319                             "ATIO_TYPE7", u);
 320                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 321                             &u->atio, ha_locked, 0);
 322                 } else {
 323                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 324                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 325                         if (!queued) {
 326                                 queued = 1;
 327                                 schedule_delayed_work(&vha->unknown_atio_work,
 328                                     1);
 329                         }
 330                         continue;
 331                 }
 332
 333 abort:
 334                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 335                 list_del(&u->cmd_list);
 336                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 337                 kfree(u);
 338         }
 339 }
 340
 341 void qlt_unknown_atio_work_fn(struct work_struct *work)
 342 {
 343         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 344             struct scsi_qla_host, unknown_atio_work);
 345
 346         qlt_try_to_dequeue_unknown_atios(vha, 0);
 347 }
 348
 349 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 350         struct atio_from_isp *atio, uint8_t ha_locked)
 351 {
 352         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 353                 "%s: qla_target(%d): type %x ox_id %04x\n",
 354                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 355                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 356
 357         switch (atio->u.raw.entry_type) {
 358         case ATIO_TYPE7:
 359         {
 360                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 361                     atio->u.isp24.fcp_hdr.d_id);
 362                 if (unlikely(NULL == host)) {
 363                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 364                             "qla_target(%d): Received ATIO_TYPE7 "
 365                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 366                             atio->u.isp24.fcp_hdr.d_id[0],
 367                             atio->u.isp24.fcp_hdr.d_id[1],
 368                             atio->u.isp24.fcp_hdr.d_id[2]);
 369
 370
 371                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 372                         break;
 373                 }
 374                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 375                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 376
 377                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 378                 break;
 379         }
 380
 381         case IMMED_NOTIFY_TYPE:
 382         {
 383                 struct scsi_qla_host *host = vha;
 384                 struct imm_ntfy_from_isp *entry =
 385                     (struct imm_ntfy_from_isp *)atio;
 386
 387                 qlt_issue_marker(vha, ha_locked);
 388
 389                 if ((entry->u.isp24.vp_index != 0xFF) &&
 390                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 391                         host = qlt_find_host_by_vp_idx(vha,
 392                             entry->u.isp24.vp_index);
 393                         if (unlikely(!host)) {
 394                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 395                                     "qla_target(%d): Received "
 396                                     "ATIO (IMMED_NOTIFY_TYPE) "
 397                                     "with unknown vp_index %d\n",
 398                                     vha->vp_idx, entry->u.isp24.vp_index);
 399                                 break;
 400                         }
 401                 }
 402                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 403                 break;
 404         }
 405
 406         case VP_RPT_ID_IOCB_TYPE:
 407                 qla24xx_report_id_acquisition(vha,
 408                         (struct vp_rpt_id_entry_24xx *)atio);
 409                 break;
 410
 411         case ABTS_RECV_24XX:
 412         {
 413                 struct abts_recv_from_24xx *entry =
 414                         (struct abts_recv_from_24xx *)atio;
 415                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 416                         entry->vp_index);
 417                 unsigned long flags;
 418
 419                 if (unlikely(!host)) {
 420                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 421                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 422                             "received, with unknown vp_index %d\n",
 423                             vha->vp_idx, entry->vp_index);
 424                         break;
 425                 }
 426                 if (!ha_locked)
 427                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 428                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 429                 if (!ha_locked)
 430                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 431                 break;
 432         }
 433
 434         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 435
 436         default:
 437                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 438                     "qla_target(%d): Received unknown ATIO atio "
 439                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 440                 break;
 441         }
 442
 443         return false;
 444 }
 445
 446 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 447         struct rsp_que *rsp, response_t *pkt)
 448 {
 449         switch (pkt->entry_type) {
 450         case CTIO_CRC2:
 451                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 452                         "qla_target(%d):%s: CRC2 Response pkt\n",
 453                         vha->vp_idx, __func__);
 454                 /* fall through */
 455         case CTIO_TYPE7:
 456         {
 457                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 458                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 459                     entry->vp_index);
 460                 if (unlikely(!host)) {
 461                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 462                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 463                             "received, with unknown vp_index %d\n",
 464                             vha->vp_idx, entry->vp_index);
 465                         break;
 466                 }
 467                 qlt_response_pkt(host, rsp, pkt);
 468                 break;
 469         }
 470
 471         case IMMED_NOTIFY_TYPE:
 472         {
 473                 struct scsi_qla_host *host = vha;
 474                 struct imm_ntfy_from_isp *entry =
 475                     (struct imm_ntfy_from_isp *)pkt;
 476
 477                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 478                 if (unlikely(!host)) {
 479                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 480                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 481                             "received, with unknown vp_index %d\n",
 482                             vha->vp_idx, entry->u.isp24.vp_index);
 483                         break;
 484                 }
 485                 qlt_response_pkt(host, rsp, pkt);
 486                 break;
 487         }
 488
 489         case NOTIFY_ACK_TYPE:
 490         {
 491                 struct scsi_qla_host *host = vha;
 492                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 493
 494                 if (0xFF != entry->u.isp24.vp_index) {
 495                         host = qlt_find_host_by_vp_idx(vha,
 496                             entry->u.isp24.vp_index);
 497                         if (unlikely(!host)) {
 498                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 499                                     "qla_target(%d): Response "
 500                                     "pkt (NOTIFY_ACK_TYPE) "
 501                                     "received, with unknown "
 502                                     "vp_index %d\n", vha->vp_idx,
 503                                     entry->u.isp24.vp_index);
 504                                 break;
 505                         }
 506                 }
 507                 qlt_response_pkt(host, rsp, pkt);
 508                 break;
 509         }
 510
 511         case ABTS_RECV_24XX:
 512         {
 513                 struct abts_recv_from_24xx *entry =
 514                     (struct abts_recv_from_24xx *)pkt;
 515                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 516                     entry->vp_index);
 517                 if (unlikely(!host)) {
 518                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 519                             "qla_target(%d): Response pkt "
 520                             "(ABTS_RECV_24XX) received, with unknown "
 521                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 522                         break;
 523                 }
 524                 qlt_response_pkt(host, rsp, pkt);
 525                 break;
 526         }
 527
 528         case ABTS_RESP_24XX:
 529         {
 530                 struct abts_resp_to_24xx *entry =
 531                     (struct abts_resp_to_24xx *)pkt;
 532                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 533                     entry->vp_index);
 534                 if (unlikely(!host)) {
 535                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 536                             "qla_target(%d): Response pkt "
 537                             "(ABTS_RECV_24XX) received, with unknown "
 538                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 539                         break;
 540                 }
 541                 qlt_response_pkt(host, rsp, pkt);
 542                 break;
 543         }
 544
 545         default:
 546                 qlt_response_pkt(vha, rsp, pkt);
 547                 break;
 548         }
 549
 550 }
 551
 552 /*
 553  * All qlt_plogi_ack_t operations are protected by hardware_lock
 554  */
 555 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 556         struct imm_ntfy_from_isp *ntfy, int type)
 557 {
 558         struct qla_work_evt *e;
 559         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 560         if (!e)
 561                 return QLA_FUNCTION_FAILED;
 562
 563         e->u.nack.fcport = fcport;
 564         e->u.nack.type = type;
 565         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 566         return qla2x00_post_work(vha, e);
 567 }
 568
 569 static
 570 void qla2x00_async_nack_sp_done(void *s, int res)
 571 {
 572         struct srb *sp = (struct srb *)s;
 573         struct scsi_qla_host *vha = sp->vha;
 574         unsigned long flags;
 575
 576         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 577             "Async done-%s res %x %8phC  type %d\n",
 578             sp->name, res, sp->fcport->port_name, sp->type);
 579
 580         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 581         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 582         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 583
 584         switch (sp->type) {
 585         case SRB_NACK_PLOGI:
 586                 sp->fcport->login_gen++;
 587                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 588                 sp->fcport->logout_on_delete = 1;
 589                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 590                 sp->fcport->send_els_logo = 0;
 591                 break;
 592
 593         case SRB_NACK_PRLI:
 594                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 595                 sp->fcport->deleted = 0;
 596                 sp->fcport->send_els_logo = 0;
 597
 598                 if (!sp->fcport->login_succ &&
 599                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 600                         sp->fcport->login_succ = 1;
 601
 602                         vha->fcport_count++;
 603                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 604                         qla24xx_sched_upd_fcport(sp->fcport);
 605                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 606                 } else {
 607                         sp->fcport->login_retry = 0;
 608                         sp->fcport->disc_state = DSC_LOGIN_COMPLETE;
 609                         sp->fcport->deleted = 0;
 610                         sp->fcport->logout_on_delete = 1;
 611                 }
 612                 break;
 613
 614         case SRB_NACK_LOGO:
 615                 sp->fcport->login_gen++;
 616                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 617                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 618                 break;
 619         }
 620         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 621
 622         sp->free(sp);
 623 }
 624
 625 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 626         struct imm_ntfy_from_isp *ntfy, int type)
 627 {
 628         int rval = QLA_FUNCTION_FAILED;
 629         srb_t *sp;
 630         char *c = NULL;
 631
 632         fcport->flags |= FCF_ASYNC_SENT;
 633         switch (type) {
 634         case SRB_NACK_PLOGI:
 635                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 636                 c = "PLOGI";
 637                 break;
 638         case SRB_NACK_PRLI:
 639                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 640                 fcport->deleted = 0;
 641                 c = "PRLI";
 642                 break;
 643         case SRB_NACK_LOGO:
 644                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 645                 c = "LOGO";
 646                 break;
 647         }
 648
 649         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 650         if (!sp)
 651                 goto done;
 652
 653         sp->type = type;
 654         sp->name = "nack";
 655
 656         sp->u.iocb_cmd.timeout = qla2x00_async_iocb_timeout;
 657         qla2x00_init_timer(sp, qla2x00_get_async_timeout(vha)+2);
 658
 659         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 660         sp->done = qla2x00_async_nack_sp_done;
 661
 662         rval = qla2x00_start_sp(sp);
 663         if (rval != QLA_SUCCESS)
 664                 goto done_free_sp;
 665
 666         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 667             "Async-%s %8phC hndl %x %s\n",
 668             sp->name, fcport->port_name, sp->handle, c);
 669
 670         return rval;
 671
 672 done_free_sp:
 673         sp->free(sp);
 674 done:
 675         fcport->flags &= ~FCF_ASYNC_SENT;
 676         return rval;
 677 }
 678
 679 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 680 {
 681         fc_port_t *t;
 682
 683         switch (e->u.nack.type) {
 684         case SRB_NACK_PRLI:
 685                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 686                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 687                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 688                 if (t) {
 689                         ql_log(ql_log_info, vha, 0xd034,
 690                             "%s create sess success %p", __func__, t);
 691                         /* create sess has an extra kref */
 692                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 693                 }
 694                 break;
 695         }
 696         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 697             (struct imm_ntfy_from_isp*)e->u.nack.iocb, e->u.nack.type);
 698 }
 699
 700 void qla24xx_delete_sess_fn(struct work_struct *work)
 701 {
 702         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 703         struct qla_hw_data *ha = fcport->vha->hw;
 704
 705         if (fcport->se_sess) {
 706                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 707                 ha->tgt.tgt_ops->put_sess(fcport);
 708         } else {
 709                 qlt_unreg_sess(fcport);
 710         }
 711 }
 712
 713 /*
 714  * Called from qla2x00_reg_remote_port()
 715  */
 716 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 717 {
 718         struct qla_hw_data *ha = vha->hw;
 719         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 720         struct fc_port *sess = fcport;
 721         unsigned long flags;
 722
 723         if (!vha->hw->tgt.tgt_ops)
 724                 return;
 725
 726         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 727         if (tgt->tgt_stop) {
 728                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 729                 return;
 730         }
 731
 732         if (fcport->disc_state == DSC_DELETE_PEND) {
 733                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 734                 return;
 735         }
 736
 737         if (!sess->se_sess) {
 738                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 739
 740                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 741                 sess = qlt_create_sess(vha, fcport, false);
 742                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 743
 744                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 745         } else {
 746                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 747                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 748                         return;
 749                 }
 750
 751                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 752                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 753                             "%s: kref_get fail sess %8phC \n",
 754                             __func__, sess->port_name);
 755                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 756                         return;
 757                 }
 758
 759                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 760                     "qla_target(%u): %ssession for port %8phC "
 761                     "(loop ID %d) reappeared\n", vha->vp_idx,
 762                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 763
 764                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 765                     "Reappeared sess %p\n", sess);
 766
 767                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 768                     fcport->loop_id,
 769                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 770         }
 771
 772         if (sess && sess->local) {
 773                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 774                     "qla_target(%u): local session for "
 775                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 776                     fcport->port_name, sess->loop_id);
 777                 sess->local = 0;
 778         }
 779         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 780
 781         ha->tgt.tgt_ops->put_sess(sess);
 782 }
 783
 784 /*
 785  * This is a zero-base ref-counting solution, since hardware_lock
 786  * guarantees that ref_count is not modified concurrently.
 787  * Upon successful return content of iocb is undefined
 788  */
 789 static struct qlt_plogi_ack_t *
 790 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 791                        struct imm_ntfy_from_isp *iocb)
 792 {
 793         struct qlt_plogi_ack_t *pla;
 794
 795         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 796                 if (pla->id.b24 == id->b24) {
 797                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 798                             "%s %d %8phC Term INOT due to new INOT",
 799                             __func__, __LINE__,
 800                             pla->iocb.u.isp24.port_name);
 801                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 802                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 803                         return pla;
 804                 }
 805         }
 806
 807         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 808         if (!pla) {
 809                 ql_dbg(ql_dbg_async, vha, 0x5088,
 810                        "qla_target(%d): Allocation of plogi_ack failed\n",
 811                        vha->vp_idx);
 812                 return NULL;
 813         }
 814
 815         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 816         pla->id = *id;
 817         list_add_tail(&pla->list, &vha->plogi_ack_list);
 818
 819         return pla;
 820 }
 821
 822 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 823     struct qlt_plogi_ack_t *pla)
 824 {
 825         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 826         port_id_t port_id;
 827         uint16_t loop_id;
 828         fc_port_t *fcport = pla->fcport;
 829
 830         BUG_ON(!pla->ref_count);
 831         pla->ref_count--;
 832
 833         if (pla->ref_count)
 834                 return;
 835
 836         ql_dbg(ql_dbg_disc, vha, 0x5089,
 837             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 838             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 839             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 840             iocb->u.isp24.port_id[0],
 841             le16_to_cpu(iocb->u.isp24.nport_handle),
 842             iocb->u.isp24.exchange_address, iocb->ox_id);
 843
 844         port_id.b.domain = iocb->u.isp24.port_id[2];
 845         port_id.b.area   = iocb->u.isp24.port_id[1];
 846         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 847         port_id.b.rsvd_1 = 0;
 848
 849         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 850
 851         fcport->loop_id = loop_id;
 852         fcport->d_id = port_id;
 853         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 854                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 855         else
 856                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 857
 858         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 859                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 860                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 861                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 862                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 863         }
 864
 865         list_del(&pla->list);
 866         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 867 }
 868
 869 void
 870 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 871     struct fc_port *sess, enum qlt_plogi_link_t link)
 872 {
 873         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 874         /* Inc ref_count first because link might already be pointing at pla */
 875         pla->ref_count++;
 876
 877         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 878                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 879                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 880                 sess, link, sess->port_name,
 881                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 882                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 883                 pla->ref_count, pla, link);
 884
 885         if (link == QLT_PLOGI_LINK_CONFLICT) {
 886                 switch (sess->disc_state) {
 887                 case DSC_DELETED:
 888                 case DSC_DELETE_PEND:
 889                         pla->ref_count--;
 890                         return;
 891                 default:
 892                         break;
 893                 }
 894         }
 895
 896         if (sess->plogi_link[link])
 897                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 898
 899         if (link == QLT_PLOGI_LINK_SAME_WWN)
 900                 pla->fcport = sess;
 901
 902         sess->plogi_link[link] = pla;
 903 }
 904
 905 typedef struct {
 906         /* These fields must be initialized by the caller */
 907         port_id_t id;
 908         /*
 909          * number of cmds dropped while we were waiting for
 910          * initiator to ack LOGO initialize to 1 if LOGO is
 911          * triggered by a command, otherwise, to 0
 912          */
 913         int cmd_count;
 914
 915         /* These fields are used by callee */
 916         struct list_head list;
 917 } qlt_port_logo_t;
 918
 919 static void
 920 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 921 {
 922         qlt_port_logo_t *tmp;
 923         int res;
 924
 925         mutex_lock(&vha->vha_tgt.tgt_mutex);
 926
 927         list_for_each_entry(tmp, &vha->logo_list, list) {
 928                 if (tmp->id.b24 == logo->id.b24) {
 929                         tmp->cmd_count += logo->cmd_count;
 930                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 931                         return;
 932                 }
 933         }
 934
 935         list_add_tail(&logo->list, &vha->logo_list);
 936
 937         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 938
 939         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 940
 941         mutex_lock(&vha->vha_tgt.tgt_mutex);
 942         list_del(&logo->list);
 943         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 944
 945         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 946             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 947             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 948             logo->cmd_count, res);
 949 }
 950
 951 void qlt_free_session_done(struct work_struct *work)
 952 {
 953         struct fc_port *sess = container_of(work, struct fc_port,
 954             free_work);
 955         struct qla_tgt *tgt = sess->tgt;
 956         struct scsi_qla_host *vha = sess->vha;
 957         struct qla_hw_data *ha = vha->hw;
 958         unsigned long flags;
 959         bool logout_started = false;
 960         scsi_qla_host_t *base_vha;
 961         struct qlt_plogi_ack_t *own =
 962                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 963
 964         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 965                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 966                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 967                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 968                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 969                 sess->logout_on_delete, sess->keep_nport_handle,
 970                 sess->send_els_logo);
 971
 972         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 973                 qla2x00_mark_device_lost(vha, sess, 0, 0);
 974
 975                 if (sess->send_els_logo) {
 976                         qlt_port_logo_t logo;
 977
 978                         logo.id = sess->d_id;
 979                         logo.cmd_count = 0;
 980                         if (!own)
 981                                 qlt_send_first_logo(vha, &logo);
 982                         sess->send_els_logo = 0;
 983                 }
 984
 985                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
 986                         int rc;
 987
 988                         if (!own ||
 989                             (own &&
 990                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI))) {
 991                                 rc = qla2x00_post_async_logout_work(vha, sess,
 992                                     NULL);
 993                                 if (rc != QLA_SUCCESS)
 994                                         ql_log(ql_log_warn, vha, 0xf085,
 995                                             "Schedule logo failed sess %p rc %d\n",
 996                                             sess, rc);
 997                                 else
 998                                         logout_started = true;
 999                         } else if (own && (own->iocb.u.isp24.status_subcode ==
1000                                 ELS_PRLI) && ha->flags.rida_fmt2) {
1001                                 rc = qla2x00_post_async_prlo_work(vha, sess,
1002                                     NULL);
1003                                 if (rc != QLA_SUCCESS)
1004                                         ql_log(ql_log_warn, vha, 0xf085,
1005                                             "Schedule PRLO failed sess %p rc %d\n",
1006                                             sess, rc);
1007                                 else
1008                                         logout_started = true;
1009                         }
1010                 }
1011         }
1012
1013         /*
1014          * Release the target session for FC Nexus from fabric module code.
1015          */
1016         if (sess->se_sess != NULL)
1017                 ha->tgt.tgt_ops->free_session(sess);
1018
1019         if (logout_started) {
1020                 bool traced = false;
1021                 u16 cnt = 0;
1022
1023                 while (!READ_ONCE(sess->logout_completed)) {
1024                         if (!traced) {
1025                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
1026                                         "%s: waiting for sess %p logout\n",
1027                                         __func__, sess);
1028                                 traced = true;
1029                         }
1030                         msleep(100);
1031                         cnt++;
1032                         if (cnt > 200)
1033                                 break;
1034                 }
1035
1036                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1037                     "%s: sess %p logout completed\n", __func__, sess);
1038         }
1039
1040         if (sess->logo_ack_needed) {
1041                 sess->logo_ack_needed = 0;
1042                 qla24xx_async_notify_ack(vha, sess,
1043                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1044         }
1045
1046         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1047         if (sess->se_sess) {
1048                 sess->se_sess = NULL;
1049                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1050                         tgt->sess_count--;
1051         }
1052
1053         sess->disc_state = DSC_DELETED;
1054         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1055         sess->deleted = QLA_SESS_DELETED;
1056
1057         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1058                 vha->fcport_count--;
1059                 sess->login_succ = 0;
1060         }
1061
1062         qla2x00_clear_loop_id(sess);
1063
1064         if (sess->conflict) {
1065                 sess->conflict->login_pause = 0;
1066                 sess->conflict = NULL;
1067                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1068                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1069         }
1070
1071         {
1072                 struct qlt_plogi_ack_t *con =
1073                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1074                 struct imm_ntfy_from_isp *iocb;
1075                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1076
1077                 if (con) {
1078                         iocb = &con->iocb;
1079                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1080                                  "se_sess %p / sess %p port %8phC is gone,"
1081                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1082                                  sess->se_sess, sess, sess->port_name,
1083                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1084                                  own ? own->ref_count : -1,
1085                                  iocb->u.isp24.port_name, con->ref_count);
1086                         qlt_plogi_ack_unref(vha, con);
1087                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1088                 } else {
1089                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1090                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1091                             sess->se_sess, sess, sess->port_name,
1092                             own ? "releasing own PLOGI" :
1093                             "no own PLOGI pending",
1094                             own ? own->ref_count : -1);
1095                 }
1096
1097                 if (own) {
1098                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1099                         qlt_plogi_ack_unref(vha, own);
1100                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1101                 }
1102         }
1103
1104         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1105
1106         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
1107             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1108                 sess, sess->port_name, vha->fcport_count);
1109
1110         if (tgt && (tgt->sess_count == 0))
1111                 wake_up_all(&tgt->waitQ);
1112
1113         if (vha->fcport_count == 0)
1114                 wake_up_all(&vha->fcport_waitQ);
1115
1116         base_vha = pci_get_drvdata(ha->pdev);
1117
1118         sess->free_pending = 0;
1119
1120         if (test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags))
1121                 return;
1122
1123         if ((!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1124                 switch (vha->host->active_mode) {
1125                 case MODE_INITIATOR:
1126                 case MODE_DUAL:
1127                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1128                         qla2xxx_wake_dpc(vha);
1129                         break;
1130                 case MODE_TARGET:
1131                 default:
1132                         /* no-op */
1133                         break;
1134                 }
1135         }
1136 }
1137
1138 /* ha->tgt.sess_lock supposed to be held on entry */
1139 void qlt_unreg_sess(struct fc_port *sess)
1140 {
1141         struct scsi_qla_host *vha = sess->vha;
1142         unsigned long flags;
1143
1144         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1145             "%s sess %p for deletion %8phC\n",
1146             __func__, sess, sess->port_name);
1147
1148         spin_lock_irqsave(&sess->vha->work_lock, flags);
1149         if (sess->free_pending) {
1150                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1151                 return;
1152         }
1153         sess->free_pending = 1;
1154         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1155
1156         if (sess->se_sess)
1157                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1158
1159         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1160         sess->disc_state = DSC_DELETE_PEND;
1161         sess->last_rscn_gen = sess->rscn_gen;
1162         sess->last_login_gen = sess->login_gen;
1163
1164         if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1165             !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1166                 sess->nvme_flag |= NVME_FLAG_DELETING;
1167                 schedule_work(&sess->nvme_del_work);
1168         } else {
1169                 INIT_WORK(&sess->free_work, qlt_free_session_done);
1170                 schedule_work(&sess->free_work);
1171         }
1172 }
1173 EXPORT_SYMBOL(qlt_unreg_sess);
1174
1175 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1176 {
1177         struct qla_hw_data *ha = vha->hw;
1178         struct fc_port *sess = NULL;
1179         uint16_t loop_id;
1180         int res = 0;
1181         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1182         unsigned long flags;
1183
1184         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1185         if (loop_id == 0xFFFF) {
1186                 /* Global event */
1187                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1188                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1189                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1190                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1191         } else {
1192                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1193                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1194                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1195         }
1196
1197         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1198             "Using sess for qla_tgt_reset: %p\n", sess);
1199         if (!sess) {
1200                 res = -ESRCH;
1201                 return res;
1202         }
1203
1204         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1205             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1206             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1207             mcmd, loop_id);
1208
1209         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1210 }
1211
1212 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1213 {
1214         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1215                 sess->logout_on_delete = 0;
1216                 sess->logo_ack_needed = 0;
1217                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1218         }
1219 }
1220
1221 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1222 {
1223         struct qla_tgt *tgt = sess->tgt;
1224         unsigned long flags;
1225         u16 sec;
1226
1227         switch (sess->disc_state) {
1228         case DSC_DELETE_PEND:
1229                 return;
1230         case DSC_DELETED:
1231                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1232                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]) {
1233                         if (tgt && tgt->tgt_stop && tgt->sess_count == 0)
1234                                 wake_up_all(&tgt->waitQ);
1235
1236                         if (sess->vha->fcport_count == 0)
1237                                 wake_up_all(&sess->vha->fcport_waitQ);
1238                         return;
1239                 }
1240                 break;
1241         case DSC_UPD_FCPORT:
1242                 /*
1243                  * This port is not done reporting to upper layer.
1244                  * let it finish
1245                  */
1246                 sess->next_disc_state = DSC_DELETE_PEND;
1247                 sec = jiffies_to_msecs(jiffies -
1248                     sess->jiffies_at_registration)/1000;
1249                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1250                         sess->sec_since_registration = sec;
1251                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1252                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1253                             __func__, sess->port_name, sec);
1254                 }
1255                 return;
1256         default:
1257                 break;
1258         }
1259
1260         if (sess->deleted == QLA_SESS_DELETED)
1261                 sess->logout_on_delete = 0;
1262
1263         spin_lock_irqsave(&sess->vha->work_lock, flags);
1264         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1265                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1266                 return;
1267         }
1268         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1269         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1270
1271         sess->disc_state = DSC_DELETE_PEND;
1272
1273         qla24xx_chk_fcp_state(sess);
1274
1275         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
1276             "Scheduling sess %p for deletion %8phC\n",
1277             sess, sess->port_name);
1278
1279         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1280 }
1281
1282 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1283 {
1284         struct fc_port *sess;
1285         scsi_qla_host_t *vha = tgt->vha;
1286
1287         list_for_each_entry(sess, &vha->vp_fcports, list) {
1288                 if (sess->se_sess)
1289                         qlt_schedule_sess_for_deletion(sess);
1290         }
1291
1292         /* At this point tgt could be already dead */
1293 }
1294
1295 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
1296         uint16_t *loop_id)
1297 {
1298         struct qla_hw_data *ha = vha->hw;
1299         dma_addr_t gid_list_dma;
1300         struct gid_list_info *gid_list;
1301         char *id_iter;
1302         int res, rc, i;
1303         uint16_t entries;
1304
1305         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1306             &gid_list_dma, GFP_KERNEL);
1307         if (!gid_list) {
1308                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1309                     "qla_target(%d): DMA Alloc failed of %u\n",
1310                     vha->vp_idx, qla2x00_gid_list_size(ha));
1311                 return -ENOMEM;
1312         }
1313
1314         /* Get list of logged in devices */
1315         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1316         if (rc != QLA_SUCCESS) {
1317                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1318                     "qla_target(%d): get_id_list() failed: %x\n",
1319                     vha->vp_idx, rc);
1320                 res = -EBUSY;
1321                 goto out_free_id_list;
1322         }
1323
1324         id_iter = (char *)gid_list;
1325         res = -ENOENT;
1326         for (i = 0; i < entries; i++) {
1327                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
1328                 if ((gid->al_pa == s_id[2]) &&
1329                     (gid->area == s_id[1]) &&
1330                     (gid->domain == s_id[0])) {
1331                         *loop_id = le16_to_cpu(gid->loop_id);
1332                         res = 0;
1333                         break;
1334                 }
1335                 id_iter += ha->gid_list_info_size;
1336         }
1337
1338 out_free_id_list:
1339         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1340             gid_list, gid_list_dma);
1341         return res;
1342 }
1343
1344 /*
1345  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1346  * Caller must put it.
1347  */
1348 static struct fc_port *qlt_create_sess(
1349         struct scsi_qla_host *vha,
1350         fc_port_t *fcport,
1351         bool local)
1352 {
1353         struct qla_hw_data *ha = vha->hw;
1354         struct fc_port *sess = fcport;
1355         unsigned long flags;
1356
1357         if (vha->vha_tgt.qla_tgt->tgt_stop)
1358                 return NULL;
1359
1360         if (fcport->se_sess) {
1361                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1362                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1363                             "%s: kref_get_unless_zero failed for %8phC\n",
1364                             __func__, sess->port_name);
1365                         return NULL;
1366                 }
1367                 return fcport;
1368         }
1369         sess->tgt = vha->vha_tgt.qla_tgt;
1370         sess->local = local;
1371
1372         /*
1373          * Under normal circumstances we want to logout from firmware when
1374          * session eventually ends and release corresponding nport handle.
1375          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1376          * code will adjust these flags as necessary.
1377          */
1378         sess->logout_on_delete = 1;
1379         sess->keep_nport_handle = 0;
1380         sess->logout_completed = 0;
1381
1382         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1383             &fcport->port_name[0], sess) < 0) {
1384                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1385                     "(%d) %8phC check_initiator_node_acl failed\n",
1386                     vha->vp_idx, fcport->port_name);
1387                 return NULL;
1388         } else {
1389                 kref_init(&fcport->sess_kref);
1390                 /*
1391                  * Take an extra reference to ->sess_kref here to handle
1392                  * fc_port access across ->tgt.sess_lock reaquire.
1393                  */
1394                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1395                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1396                             "%s: kref_get_unless_zero failed for %8phC\n",
1397                             __func__, sess->port_name);
1398                         return NULL;
1399                 }
1400
1401                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1402                 if (!IS_SW_RESV_ADDR(sess->d_id))
1403                         vha->vha_tgt.qla_tgt->sess_count++;
1404
1405                 qlt_do_generation_tick(vha, &sess->generation);
1406                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1407         }
1408
1409         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1410             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1411             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1412             vha->vha_tgt.qla_tgt->sess_count);
1413
1414         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1415             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1416             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1417             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1418             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1419             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1420
1421         return sess;
1422 }
1423
1424 /*
1425  * max_gen - specifies maximum session generation
1426  * at which this deletion requestion is still valid
1427  */
1428 void
1429 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1430 {
1431         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1432         struct fc_port *sess = fcport;
1433         unsigned long flags;
1434
1435         if (!vha->hw->tgt.tgt_ops)
1436                 return;
1437
1438         if (!tgt)
1439                 return;
1440
1441         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1442         if (tgt->tgt_stop) {
1443                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1444                 return;
1445         }
1446         if (!sess->se_sess) {
1447                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1448                 return;
1449         }
1450
1451         if (max_gen - sess->generation < 0) {
1452                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1453                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1454                     "Ignoring stale deletion request for se_sess %p / sess %p"
1455                     " for port %8phC, req_gen %d, sess_gen %d\n",
1456                     sess->se_sess, sess, sess->port_name, max_gen,
1457                     sess->generation);
1458                 return;
1459         }
1460
1461         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1462
1463         sess->local = 1;
1464         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1465         qlt_schedule_sess_for_deletion(sess);
1466 }
1467
1468 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1469 {
1470         struct qla_hw_data *ha = tgt->ha;
1471         unsigned long flags;
1472         int res;
1473         /*
1474          * We need to protect against race, when tgt is freed before or
1475          * inside wake_up()
1476          */
1477         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1478         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1479             "tgt %p, sess_count=%d\n",
1480             tgt, tgt->sess_count);
1481         res = (tgt->sess_count == 0);
1482         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1483
1484         return res;
1485 }
1486
1487 /* Called by tcm_qla2xxx configfs code */
1488 int qlt_stop_phase1(struct qla_tgt *tgt)
1489 {
1490         struct scsi_qla_host *vha = tgt->vha;
1491         struct qla_hw_data *ha = tgt->ha;
1492         unsigned long flags;
1493
1494         mutex_lock(&qla_tgt_mutex);
1495         if (!vha->fc_vport) {
1496                 struct Scsi_Host *sh = vha->host;
1497                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
1498                 bool npiv_vports;
1499
1500                 spin_lock_irqsave(sh->host_lock, flags);
1501                 npiv_vports = (fc_host->npiv_vports_inuse);
1502                 spin_unlock_irqrestore(sh->host_lock, flags);
1503
1504                 if (npiv_vports) {
1505                         mutex_unlock(&qla_tgt_mutex);
1506                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
1507                             "NPIV is in use. Can not stop target\n");
1508                         return -EPERM;
1509                 }
1510         }
1511         if (tgt->tgt_stop || tgt->tgt_stopped) {
1512                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1513                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1514                 mutex_unlock(&qla_tgt_mutex);
1515                 return -EPERM;
1516         }
1517
1518         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1519             vha->host_no, vha);
1520         /*
1521          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1522          * Lock is needed, because we still can get an incoming packet.
1523          */
1524         mutex_lock(&vha->vha_tgt.tgt_mutex);
1525         tgt->tgt_stop = 1;
1526         qlt_clear_tgt_db(tgt);
1527         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1528         mutex_unlock(&qla_tgt_mutex);
1529
1530         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1531             "Waiting for sess works (tgt %p)", tgt);
1532         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1533         while (!list_empty(&tgt->sess_works_list)) {
1534                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1535                 flush_scheduled_work();
1536                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1537         }
1538         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1539
1540         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1541             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1542
1543         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1544
1545         /* Big hammer */
1546         if (!ha->flags.host_shutting_down &&
1547             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1548                 qlt_disable_vha(vha);
1549
1550         /* Wait for sessions to clear out (just in case) */
1551         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1552         return 0;
1553 }
1554 EXPORT_SYMBOL(qlt_stop_phase1);
1555
1556 /* Called by tcm_qla2xxx configfs code */
1557 void qlt_stop_phase2(struct qla_tgt *tgt)
1558 {
1559         scsi_qla_host_t *vha = tgt->vha;
1560
1561         if (tgt->tgt_stopped) {
1562                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1563                     "Already in tgt->tgt_stopped state\n");
1564                 dump_stack();
1565                 return;
1566         }
1567         if (!tgt->tgt_stop) {
1568                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1569                     "%s: phase1 stop is not completed\n", __func__);
1570                 dump_stack();
1571                 return;
1572         }
1573
1574         mutex_lock(&tgt->ha->optrom_mutex);
1575         mutex_lock(&vha->vha_tgt.tgt_mutex);
1576         tgt->tgt_stop = 0;
1577         tgt->tgt_stopped = 1;
1578         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1579         mutex_unlock(&tgt->ha->optrom_mutex);
1580
1581         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1582             tgt);
1583 }
1584 EXPORT_SYMBOL(qlt_stop_phase2);
1585
1586 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1587 static void qlt_release(struct qla_tgt *tgt)
1588 {
1589         scsi_qla_host_t *vha = tgt->vha;
1590         void *node;
1591         u64 key = 0;
1592         u16 i;
1593         struct qla_qpair_hint *h;
1594         struct qla_hw_data *ha = vha->hw;
1595
1596         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stop &&
1597             !tgt->tgt_stopped)
1598                 qlt_stop_phase1(tgt);
1599
1600         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1601                 qlt_stop_phase2(tgt);
1602
1603         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1604                 unsigned long flags;
1605
1606                 h = &tgt->qphints[i];
1607                 if (h->qpair) {
1608                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1609                         list_del(&h->hint_elem);
1610                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1611                         h->qpair = NULL;
1612                 }
1613         }
1614         kfree(tgt->qphints);
1615         mutex_lock(&qla_tgt_mutex);
1616         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1617         mutex_unlock(&qla_tgt_mutex);
1618
1619         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1620                 btree_remove64(&tgt->lun_qpair_map, key);
1621
1622         btree_destroy64(&tgt->lun_qpair_map);
1623
1624         if (vha->vp_idx)
1625                 if (ha->tgt.tgt_ops &&
1626                     ha->tgt.tgt_ops->remove_target &&
1627                     vha->vha_tgt.target_lport_ptr)
1628                         ha->tgt.tgt_ops->remove_target(vha);
1629
1630         vha->vha_tgt.qla_tgt = NULL;
1631
1632         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1633             "Release of tgt %p finished\n", tgt);
1634
1635         kfree(tgt);
1636 }
1637
1638 /* ha->hardware_lock supposed to be held on entry */
1639 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1640         const void *param, unsigned int param_size)
1641 {
1642         struct qla_tgt_sess_work_param *prm;
1643         unsigned long flags;
1644
1645         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1646         if (!prm) {
1647                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1648                     "qla_target(%d): Unable to create session "
1649                     "work, command will be refused", 0);
1650                 return -ENOMEM;
1651         }
1652
1653         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1654             "Scheduling work (type %d, prm %p)"
1655             " to find session for param %p (size %d, tgt %p)\n",
1656             type, prm, param, param_size, tgt);
1657
1658         prm->type = type;
1659         memcpy(&prm->tm_iocb, param, param_size);
1660
1661         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1662         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1663         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1664
1665         schedule_work(&tgt->sess_work);
1666
1667         return 0;
1668 }
1669
1670 /*
1671  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1672  */
1673 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1674         struct imm_ntfy_from_isp *ntfy,
1675         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1676         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1677 {
1678         struct scsi_qla_host *vha = qpair->vha;
1679         struct qla_hw_data *ha = vha->hw;
1680         request_t *pkt;
1681         struct nack_to_isp *nack;
1682
1683         if (!ha->flags.fw_started)
1684                 return;
1685
1686         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1687
1688         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1689         if (!pkt) {
1690                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1691                     "qla_target(%d): %s failed: unable to allocate "
1692                     "request packet\n", vha->vp_idx, __func__);
1693                 return;
1694         }
1695
1696         if (vha->vha_tgt.qla_tgt != NULL)
1697                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1698
1699         pkt->entry_type = NOTIFY_ACK_TYPE;
1700         pkt->entry_count = 1;
1701
1702         nack = (struct nack_to_isp *)pkt;
1703         nack->ox_id = ntfy->ox_id;
1704
1705         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1706         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1707         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1708                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1709                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1710         }
1711         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1712         nack->u.isp24.status = ntfy->u.isp24.status;
1713         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1714         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1715         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1716         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1717         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1718         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1719         nack->u.isp24.srr_reject_code = srr_reject_code;
1720         nack->u.isp24.srr_reject_code_expl = srr_explan;
1721         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1722
1723         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1724             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1725             vha->vp_idx, nack->u.isp24.status);
1726
1727         /* Memory Barrier */
1728         wmb();
1729         qla2x00_start_iocbs(vha, qpair->req);
1730 }
1731
1732 /*
1733  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1734  */
1735 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1736         struct abts_recv_from_24xx *abts, uint32_t status,
1737         bool ids_reversed)
1738 {
1739         struct scsi_qla_host *vha = qpair->vha;
1740         struct qla_hw_data *ha = vha->hw;
1741         struct abts_resp_to_24xx *resp;
1742         uint32_t f_ctl;
1743         uint8_t *p;
1744
1745         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1746             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1747             ha, abts, status);
1748
1749         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1750             NULL);
1751         if (!resp) {
1752                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1753                     "qla_target(%d): %s failed: unable to allocate "
1754                     "request packet", vha->vp_idx, __func__);
1755                 return;
1756         }
1757
1758         resp->entry_type = ABTS_RESP_24XX;
1759         resp->entry_count = 1;
1760         resp->nport_handle = abts->nport_handle;
1761         resp->vp_index = vha->vp_idx;
1762         resp->sof_type = abts->sof_type;
1763         resp->exchange_address = abts->exchange_address;
1764         resp->fcp_hdr_le = abts->fcp_hdr_le;
1765         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1766             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1767             F_CTL_SEQ_INITIATIVE);
1768         p = (uint8_t *)&f_ctl;
1769         resp->fcp_hdr_le.f_ctl[0] = *p++;
1770         resp->fcp_hdr_le.f_ctl[1] = *p++;
1771         resp->fcp_hdr_le.f_ctl[2] = *p;
1772         if (ids_reversed) {
1773                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1774                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1775                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1776                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1777                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1778                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1779         } else {
1780                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1781                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1782                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1783                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1784                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1785                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1786         }
1787         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1788         if (status == FCP_TMF_CMPL) {
1789                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1790                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1791                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1792                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1793                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1794                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1795         } else {
1796                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1797                 resp->payload.ba_rjt.reason_code =
1798                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1799                 /* Other bytes are zero */
1800         }
1801
1802         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1803
1804         /* Memory Barrier */
1805         wmb();
1806         if (qpair->reqq_start_iocbs)
1807                 qpair->reqq_start_iocbs(qpair);
1808         else
1809                 qla2x00_start_iocbs(vha, qpair->req);
1810 }
1811
1812 /*
1813  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1814  */
1815 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1816         struct abts_resp_from_24xx_fw *entry)
1817 {
1818         struct ctio7_to_24xx *ctio;
1819
1820         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1821             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1822
1823         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(
1824             vha->hw->base_qpair, NULL);
1825         if (ctio == NULL) {
1826                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1827                     "qla_target(%d): %s failed: unable to allocate "
1828                     "request packet\n", vha->vp_idx, __func__);
1829                 return;
1830         }
1831
1832         /*
1833          * We've got on entrance firmware's response on by us generated
1834          * ABTS response. So, in it ID fields are reversed.
1835          */
1836
1837         ctio->entry_type = CTIO_TYPE7;
1838         ctio->entry_count = 1;
1839         ctio->nport_handle = entry->nport_handle;
1840         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1841         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1842         ctio->vp_index = vha->vp_idx;
1843         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1844         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1845         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1846         ctio->exchange_addr = entry->exchange_addr_to_abort;
1847         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1848                                             CTIO7_FLAGS_TERMINATE);
1849         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1850
1851         /* Memory Barrier */
1852         wmb();
1853         qla2x00_start_iocbs(vha, vha->req);
1854
1855         qlt_24xx_send_abts_resp(vha->hw->base_qpair,
1856             (struct abts_recv_from_24xx *)entry,
1857             FCP_TMF_CMPL, true);
1858 }
1859
1860 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1861 {
1862         struct qla_tgt_sess_op *op;
1863         struct qla_tgt_cmd *cmd;
1864         unsigned long flags;
1865
1866         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1867         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1868                 if (tag == op->atio.u.isp24.exchange_addr) {
1869                         op->aborted = true;
1870                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1871                         return 1;
1872                 }
1873         }
1874
1875         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1876                 if (tag == op->atio.u.isp24.exchange_addr) {
1877                         op->aborted = true;
1878                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1879                         return 1;
1880                 }
1881         }
1882
1883         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1884                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1885                         cmd->aborted = 1;
1886                         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1887                         return 1;
1888                 }
1889         }
1890         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1891
1892         return 0;
1893 }
1894
1895 /* drop cmds for the given lun
1896  * XXX only looks for cmds on the port through which lun reset was recieved
1897  * XXX does not go through the list of other port (which may have cmds
1898  *     for the same lun)
1899  */
1900 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1901                                 u64 lun, uint8_t *s_id)
1902 {
1903         struct qla_tgt_sess_op *op;
1904         struct qla_tgt_cmd *cmd;
1905         uint32_t key;
1906         unsigned long flags;
1907
1908         key = sid_to_key(s_id);
1909         spin_lock_irqsave(&vha->cmd_list_lock, flags);
1910         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1911                 uint32_t op_key;
1912                 u64 op_lun;
1913
1914                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1915                 op_lun = scsilun_to_int(
1916                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1917                 if (op_key == key && op_lun == lun)
1918                         op->aborted = true;
1919         }
1920
1921         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
1922                 uint32_t op_key;
1923                 u64 op_lun;
1924
1925                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1926                 op_lun = scsilun_to_int(
1927                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1928                 if (op_key == key && op_lun == lun)
1929                         op->aborted = true;
1930         }
1931
1932         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1933                 uint32_t cmd_key;
1934                 u64 cmd_lun;
1935
1936                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1937                 cmd_lun = scsilun_to_int(
1938                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1939                 if (cmd_key == key && cmd_lun == lun)
1940                         cmd->aborted = 1;
1941         }
1942         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
1943 }
1944
1945 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
1946     uint64_t unpacked_lun)
1947 {
1948         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1949         struct qla_qpair_hint *h = NULL;
1950
1951         if (vha->flags.qpairs_available) {
1952                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
1953                 if (!h)
1954                         h = &tgt->qphints[0];
1955         } else {
1956                 h = &tgt->qphints[0];
1957         }
1958
1959         return h;
1960 }
1961
1962 static void qlt_do_tmr_work(struct work_struct *work)
1963 {
1964         struct qla_tgt_mgmt_cmd *mcmd =
1965                 container_of(work, struct qla_tgt_mgmt_cmd, work);
1966         struct qla_hw_data *ha = mcmd->vha->hw;
1967         int rc = EIO;
1968         uint32_t tag;
1969         unsigned long flags;
1970
1971         switch (mcmd->tmr_func) {
1972         case QLA_TGT_ABTS:
1973                 tag = mcmd->orig_iocb.abts.exchange_addr_to_abort;
1974                 break;
1975         default:
1976                 tag = 0;
1977                 break;
1978         }
1979
1980         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
1981             mcmd->tmr_func, tag);
1982
1983         if (rc != 0) {
1984                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
1985                 switch (mcmd->tmr_func) {
1986                 case QLA_TGT_ABTS:
1987                         qlt_24xx_send_abts_resp(mcmd->qpair,
1988                             &mcmd->orig_iocb.abts,
1989                             FCP_TMF_REJECTED, false);
1990                         break;
1991                 case QLA_TGT_LUN_RESET:
1992                 case QLA_TGT_CLEAR_TS:
1993                 case QLA_TGT_ABORT_TS:
1994                 case QLA_TGT_CLEAR_ACA:
1995                 case QLA_TGT_TARGET_RESET:
1996                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
1997                             qla_sam_status);
1998                         break;
1999
2000                 case QLA_TGT_ABORT_ALL:
2001                 case QLA_TGT_NEXUS_LOSS_SESS:
2002                 case QLA_TGT_NEXUS_LOSS:
2003                         qlt_send_notify_ack(mcmd->qpair,
2004                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2005                         break;
2006                 }
2007                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2008
2009                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2010                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2011                     mcmd->vha->vp_idx, rc);
2012                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2013         }
2014 }
2015
2016 /* ha->hardware_lock supposed to be held on entry */
2017 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2018         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2019 {
2020         struct qla_hw_data *ha = vha->hw;
2021         struct qla_tgt_mgmt_cmd *mcmd;
2022         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2023
2024         if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
2025                 /* send TASK_ABORT response immediately */
2026                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_CMPL, false);
2027                 return 0;
2028         }
2029
2030         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2031             "qla_target(%d): task abort (tag=%d)\n",
2032             vha->vp_idx, abts->exchange_addr_to_abort);
2033
2034         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2035         if (mcmd == NULL) {
2036                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2037                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2038                     vha->vp_idx, __func__);
2039                 return -ENOMEM;
2040         }
2041         memset(mcmd, 0, sizeof(*mcmd));
2042
2043         mcmd->sess = sess;
2044         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2045         mcmd->reset_count = ha->base_qpair->chip_reset;
2046         mcmd->tmr_func = QLA_TGT_ABTS;
2047         mcmd->qpair = h->qpair;
2048         mcmd->vha = vha;
2049
2050         /*
2051          * LUN is looked up by target-core internally based on the passed
2052          * abts->exchange_addr_to_abort tag.
2053          */
2054         mcmd->se_cmd.cpuid = h->cpuid;
2055
2056         if (ha->tgt.tgt_ops->find_cmd_by_tag) {
2057                 struct qla_tgt_cmd *abort_cmd;
2058
2059                 abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2060                     abts->exchange_addr_to_abort);
2061                 if (abort_cmd && abort_cmd->qpair) {
2062                         mcmd->qpair = abort_cmd->qpair;
2063                         mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2064                 }
2065         }
2066
2067         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2068         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2069
2070         return 0;
2071 }
2072
2073 /*
2074  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2075  */
2076 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2077         struct abts_recv_from_24xx *abts)
2078 {
2079         struct qla_hw_data *ha = vha->hw;
2080         struct fc_port *sess;
2081         uint32_t tag = abts->exchange_addr_to_abort;
2082         uint8_t s_id[3];
2083         int rc;
2084         unsigned long flags;
2085
2086         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2087                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2088                     "qla_target(%d): ABTS: Abort Sequence not "
2089                     "supported\n", vha->vp_idx);
2090                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2091                     false);
2092                 return;
2093         }
2094
2095         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2096                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2097                     "qla_target(%d): ABTS: Unknown Exchange "
2098                     "Address received\n", vha->vp_idx);
2099                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2100                     false);
2101                 return;
2102         }
2103
2104         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2105             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2106             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
2107             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
2108             le32_to_cpu(abts->fcp_hdr_le.parameter));
2109
2110         s_id[0] = abts->fcp_hdr_le.s_id[2];
2111         s_id[1] = abts->fcp_hdr_le.s_id[1];
2112         s_id[2] = abts->fcp_hdr_le.s_id[0];
2113
2114         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2115         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2116         if (!sess) {
2117                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2118                     "qla_target(%d): task abort for non-existent session\n",
2119                     vha->vp_idx);
2120                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2121
2122                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2123                             false);
2124                 return;
2125         }
2126         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2127
2128
2129         if (sess->deleted) {
2130                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2131                     false);
2132                 return;
2133         }
2134
2135         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2136         if (rc != 0) {
2137                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2138                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2139                     vha->vp_idx, rc);
2140                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2141                     false);
2142                 return;
2143         }
2144 }
2145
2146 /*
2147  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2148  */
2149 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2150         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2151 {
2152         struct scsi_qla_host *ha = mcmd->vha;
2153         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2154         struct ctio7_to_24xx *ctio;
2155         uint16_t temp;
2156
2157         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2158             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2159             ha, atio, resp_code);
2160
2161
2162         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2163         if (ctio == NULL) {
2164                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2165                     "qla_target(%d): %s failed: unable to allocate "
2166                     "request packet\n", ha->vp_idx, __func__);
2167                 return;
2168         }
2169
2170         ctio->entry_type = CTIO_TYPE7;
2171         ctio->entry_count = 1;
2172         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2173         ctio->nport_handle = mcmd->sess->loop_id;
2174         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2175         ctio->vp_index = ha->vp_idx;
2176         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2177         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2178         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2179         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2180         temp = (atio->u.isp24.attr << 9)|
2181                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2182         ctio->u.status1.flags = cpu_to_le16(temp);
2183         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2184         ctio->u.status1.ox_id = cpu_to_le16(temp);
2185         ctio->u.status1.scsi_status =
2186             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2187         ctio->u.status1.response_len = cpu_to_le16(8);
2188         ctio->u.status1.sense_data[0] = resp_code;
2189
2190         /* Memory Barrier */
2191         wmb();
2192         if (qpair->reqq_start_iocbs)
2193                 qpair->reqq_start_iocbs(qpair);
2194         else
2195                 qla2x00_start_iocbs(ha, qpair->req);
2196 }
2197
2198 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2199 {
2200         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2201 }
2202 EXPORT_SYMBOL(qlt_free_mcmd);
2203
2204 /*
2205  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2206  * reacquire
2207  */
2208 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2209     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2210 {
2211         struct atio_from_isp *atio = &cmd->atio;
2212         struct ctio7_to_24xx *ctio;
2213         uint16_t temp;
2214         struct scsi_qla_host *vha = cmd->vha;
2215
2216         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2217             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2218             "sense_key=%02x, asc=%02x, ascq=%02x",
2219             vha, atio, scsi_status, sense_key, asc, ascq);
2220
2221         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2222         if (!ctio) {
2223                 ql_dbg(ql_dbg_async, vha, 0x3067,
2224                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2225                     vha->host_no, __func__);
2226                 goto out;
2227         }
2228
2229         ctio->entry_type = CTIO_TYPE7;
2230         ctio->entry_count = 1;
2231         ctio->handle = QLA_TGT_SKIP_HANDLE;
2232         ctio->nport_handle = cmd->sess->loop_id;
2233         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2234         ctio->vp_index = vha->vp_idx;
2235         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2236         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2237         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2238         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2239         temp = (atio->u.isp24.attr << 9) |
2240             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2241         ctio->u.status1.flags = cpu_to_le16(temp);
2242         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2243         ctio->u.status1.ox_id = cpu_to_le16(temp);
2244         ctio->u.status1.scsi_status =
2245             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2246         ctio->u.status1.response_len = cpu_to_le16(18);
2247         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2248
2249         if (ctio->u.status1.residual != 0)
2250                 ctio->u.status1.scsi_status |=
2251                     cpu_to_le16(SS_RESIDUAL_UNDER);
2252
2253         /* Fixed format sense data. */
2254         ctio->u.status1.sense_data[0] = 0x70;
2255         ctio->u.status1.sense_data[2] = sense_key;
2256         /* Additional sense length */
2257         ctio->u.status1.sense_data[7] = 0xa;
2258         /* ASC and ASCQ */
2259         ctio->u.status1.sense_data[12] = asc;
2260         ctio->u.status1.sense_data[13] = ascq;
2261
2262         /* Memory Barrier */
2263         wmb();
2264
2265         if (qpair->reqq_start_iocbs)
2266                 qpair->reqq_start_iocbs(qpair);
2267         else
2268                 qla2x00_start_iocbs(vha, qpair->req);
2269
2270 out:
2271         return;
2272 }
2273
2274 /* callback from target fabric module code */
2275 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2276 {
2277         struct scsi_qla_host *vha = mcmd->sess->vha;
2278         struct qla_hw_data *ha = vha->hw;
2279         unsigned long flags;
2280         struct qla_qpair *qpair = mcmd->qpair;
2281
2282         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2283             "TM response mcmd (%p) status %#x state %#x",
2284             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2285
2286         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2287
2288         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2289                 /*
2290                  * Either the port is not online or this request was from
2291                  * previous life, just abort the processing.
2292                  */
2293                 ql_dbg(ql_dbg_async, vha, 0xe100,
2294                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2295                         vha->flags.online, qla2x00_reset_active(vha),
2296                         mcmd->reset_count, qpair->chip_reset);
2297                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2298                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2299                 return;
2300         }
2301
2302         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2303                 if (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2304                     ELS_LOGO ||
2305                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2306                     ELS_PRLO ||
2307                     mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode ==
2308                     ELS_TPRLO) {
2309                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2310                             "TM response logo %8phC status %#x state %#x",
2311                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2312                             mcmd->flags);
2313                         qlt_schedule_sess_for_deletion(mcmd->sess);
2314                 } else {
2315                         qlt_send_notify_ack(vha->hw->base_qpair,
2316                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2317                 }
2318         } else {
2319                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
2320                         qlt_24xx_send_abts_resp(qpair, &mcmd->orig_iocb.abts,
2321                             mcmd->fc_tm_rsp, false);
2322                 else
2323                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2324                             mcmd->fc_tm_rsp);
2325         }
2326         /*
2327          * Make the callback for ->free_mcmd() to queue_work() and invoke
2328          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2329          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2330          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2331          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2332          * qlt_xmit_tm_rsp() returns here..
2333          */
2334         ha->tgt.tgt_ops->free_mcmd(mcmd);
2335         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2336 }
2337 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2338
2339 /* No locks */
2340 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2341 {
2342         struct qla_tgt_cmd *cmd = prm->cmd;
2343
2344         BUG_ON(cmd->sg_cnt == 0);
2345
2346         prm->sg = (struct scatterlist *)cmd->sg;
2347         prm->seg_cnt = pci_map_sg(cmd->qpair->pdev, cmd->sg,
2348             cmd->sg_cnt, cmd->dma_data_direction);
2349         if (unlikely(prm->seg_cnt == 0))
2350                 goto out_err;
2351
2352         prm->cmd->sg_mapped = 1;
2353
2354         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2355                 /*
2356                  * If greater than four sg entries then we need to allocate
2357                  * the continuation entries
2358                  */
2359                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2360                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2361                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2362                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2363         } else {
2364                 /* DIF */
2365                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2366                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2367                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2368                         prm->tot_dsds = prm->seg_cnt;
2369                 } else
2370                         prm->tot_dsds = prm->seg_cnt;
2371
2372                 if (cmd->prot_sg_cnt) {
2373                         prm->prot_sg      = cmd->prot_sg;
2374                         prm->prot_seg_cnt = pci_map_sg(cmd->qpair->pdev,
2375                                 cmd->prot_sg, cmd->prot_sg_cnt,
2376                                 cmd->dma_data_direction);
2377                         if (unlikely(prm->prot_seg_cnt == 0))
2378                                 goto out_err;
2379
2380                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2381                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2382                                 /* Dif Bundling not support here */
2383                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2384                                                                 cmd->blk_sz);
2385                                 prm->tot_dsds += prm->prot_seg_cnt;
2386                         } else
2387                                 prm->tot_dsds += prm->prot_seg_cnt;
2388                 }
2389         }
2390
2391         return 0;
2392
2393 out_err:
2394         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2395             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2396             0, prm->cmd->sg_cnt);
2397         return -1;
2398 }
2399
2400 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2401 {
2402         struct qla_hw_data *ha;
2403         struct qla_qpair *qpair;
2404         if (!cmd->sg_mapped)
2405                 return;
2406
2407         qpair = cmd->qpair;
2408
2409         pci_unmap_sg(qpair->pdev, cmd->sg, cmd->sg_cnt,
2410             cmd->dma_data_direction);
2411         cmd->sg_mapped = 0;
2412
2413         if (cmd->prot_sg_cnt)
2414                 pci_unmap_sg(qpair->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
2415                         cmd->dma_data_direction);
2416
2417         if (!cmd->ctx)
2418                 return;
2419         ha = vha->hw;
2420         if (cmd->ctx_dsd_alloced)
2421                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2422
2423         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2424 }
2425
2426 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2427         uint32_t req_cnt)
2428 {
2429         uint32_t cnt;
2430         struct req_que *req = qpair->req;
2431
2432         if (req->cnt < (req_cnt + 2)) {
2433                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2434                     RD_REG_DWORD_RELAXED(req->req_q_out));
2435
2436                 if  (req->ring_index < cnt)
2437                         req->cnt = cnt - req->ring_index;
2438                 else
2439                         req->cnt = req->length - (req->ring_index - cnt);
2440
2441                 if (unlikely(req->cnt < (req_cnt + 2)))
2442                         return -EAGAIN;
2443         }
2444
2445         req->cnt -= req_cnt;
2446
2447         return 0;
2448 }
2449
2450 /*
2451  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2452  */
2453 static inline void *qlt_get_req_pkt(struct req_que *req)
2454 {
2455         /* Adjust ring index. */
2456         req->ring_index++;
2457         if (req->ring_index == req->length) {
2458                 req->ring_index = 0;
2459                 req->ring_ptr = req->ring;
2460         } else {
2461                 req->ring_ptr++;
2462         }
2463         return (cont_entry_t *)req->ring_ptr;
2464 }
2465
2466 /* ha->hardware_lock supposed to be held on entry */
2467 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2468 {
2469         uint32_t h;
2470         int index;
2471         uint8_t found = 0;
2472         struct req_que *req = qpair->req;
2473
2474         h = req->current_outstanding_cmd;
2475
2476         for (index = 1; index < req->num_outstanding_cmds; index++) {
2477                 h++;
2478                 if (h == req->num_outstanding_cmds)
2479                         h = 1;
2480
2481                 if (h == QLA_TGT_SKIP_HANDLE)
2482                         continue;
2483
2484                 if (!req->outstanding_cmds[h]) {
2485                         found = 1;
2486                         break;
2487                 }
2488         }
2489
2490         if (found) {
2491                 req->current_outstanding_cmd = h;
2492         } else {
2493                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2494                     "qla_target(%d): Ran out of empty cmd slots\n",
2495                     qpair->vha->vp_idx);
2496                 h = QLA_TGT_NULL_HANDLE;
2497         }
2498
2499         return h;
2500 }
2501
2502 /* ha->hardware_lock supposed to be held on entry */
2503 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2504         struct qla_tgt_prm *prm)
2505 {
2506         uint32_t h;
2507         struct ctio7_to_24xx *pkt;
2508         struct atio_from_isp *atio = &prm->cmd->atio;
2509         uint16_t temp;
2510
2511         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2512         prm->pkt = pkt;
2513         memset(pkt, 0, sizeof(*pkt));
2514
2515         pkt->entry_type = CTIO_TYPE7;
2516         pkt->entry_count = (uint8_t)prm->req_cnt;
2517         pkt->vp_index = prm->cmd->vp_idx;
2518
2519         h = qlt_make_handle(qpair);
2520         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2521                 /*
2522                  * CTIO type 7 from the firmware doesn't provide a way to
2523                  * know the initiator's LOOP ID, hence we can't find
2524                  * the session and, so, the command.
2525                  */
2526                 return -EAGAIN;
2527         } else
2528                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2529
2530         pkt->handle = MAKE_HANDLE(qpair->req->id, h);
2531         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2532         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2533         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2534         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2535         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2536         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2537         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2538         temp = atio->u.isp24.attr << 9;
2539         pkt->u.status0.flags |= cpu_to_le16(temp);
2540         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2541         pkt->u.status0.ox_id = cpu_to_le16(temp);
2542         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2543
2544         return 0;
2545 }
2546
2547 /*
2548  * ha->hardware_lock supposed to be held on entry. We have already made sure
2549  * that there is sufficient amount of request entries to not drop it.
2550  */
2551 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2552 {
2553         int cnt;
2554         uint32_t *dword_ptr;
2555
2556         /* Build continuation packets */
2557         while (prm->seg_cnt > 0) {
2558                 cont_a64_entry_t *cont_pkt64 =
2559                         (cont_a64_entry_t *)qlt_get_req_pkt(
2560                            prm->cmd->qpair->req);
2561
2562                 /*
2563                  * Make sure that from cont_pkt64 none of
2564                  * 64-bit specific fields used for 32-bit
2565                  * addressing. Cast to (cont_entry_t *) for
2566                  * that.
2567                  */
2568
2569                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2570
2571                 cont_pkt64->entry_count = 1;
2572                 cont_pkt64->sys_define = 0;
2573
2574                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2575                 dword_ptr = (uint32_t *)&cont_pkt64->dseg_0_address;
2576
2577                 /* Load continuation entry data segments */
2578                 for (cnt = 0;
2579                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2580                     cnt++, prm->seg_cnt--) {
2581                         *dword_ptr++ =
2582                             cpu_to_le32(pci_dma_lo32
2583                                 (sg_dma_address(prm->sg)));
2584                         *dword_ptr++ = cpu_to_le32(pci_dma_hi32
2585                             (sg_dma_address(prm->sg)));
2586                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2587
2588                         prm->sg = sg_next(prm->sg);
2589                 }
2590         }
2591 }
2592
2593 /*
2594  * ha->hardware_lock supposed to be held on entry. We have already made sure
2595  * that there is sufficient amount of request entries to not drop it.
2596  */
2597 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2598 {
2599         int cnt;
2600         uint32_t *dword_ptr;
2601         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2602
2603         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2604
2605         /* Setup packet address segment pointer */
2606         dword_ptr = pkt24->u.status0.dseg_0_address;
2607
2608         /* Set total data segment count */
2609         if (prm->seg_cnt)
2610                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2611
2612         if (prm->seg_cnt == 0) {
2613                 /* No data transfer */
2614                 *dword_ptr++ = 0;
2615                 *dword_ptr = 0;
2616                 return;
2617         }
2618
2619         /* If scatter gather */
2620
2621         /* Load command entry data segments */
2622         for (cnt = 0;
2623             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2624             cnt++, prm->seg_cnt--) {
2625                 *dword_ptr++ =
2626                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
2627
2628                 *dword_ptr++ = cpu_to_le32(pci_dma_hi32(
2629                         sg_dma_address(prm->sg)));
2630
2631                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
2632
2633                 prm->sg = sg_next(prm->sg);
2634         }
2635
2636         qlt_load_cont_data_segments(prm);
2637 }
2638
2639 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2640 {
2641         return cmd->bufflen > 0;
2642 }
2643
2644 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2645 {
2646         struct qla_tgt_cmd *cmd;
2647         struct scsi_qla_host *vha;
2648
2649         /* asc 0x10=dif error */
2650         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2651                 cmd = prm->cmd;
2652                 vha = cmd->vha;
2653                 /* ASCQ */
2654                 switch (prm->sense_buffer[13]) {
2655                 case 1:
2656                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2657                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2658                             "se_cmd=%p tag[%x]",
2659                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2660                             cmd->atio.u.isp24.exchange_addr);
2661                         break;
2662                 case 2:
2663                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2664                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2665                             "se_cmd=%p tag[%x]",
2666                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2667                             cmd->atio.u.isp24.exchange_addr);
2668                         break;
2669                 case 3:
2670                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2671                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2672                             "se_cmd=%p tag[%x]",
2673                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2674                             cmd->atio.u.isp24.exchange_addr);
2675                         break;
2676                 default:
2677                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2678                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2679                             "se_cmd=%p tag[%x]",
2680                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2681                             cmd->atio.u.isp24.exchange_addr);
2682                         break;
2683                 }
2684                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2685         }
2686 }
2687
2688 /*
2689  * Called without ha->hardware_lock held
2690  */
2691 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2692         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2693         uint32_t *full_req_cnt)
2694 {
2695         struct se_cmd *se_cmd = &cmd->se_cmd;
2696         struct qla_qpair *qpair = cmd->qpair;
2697
2698         prm->cmd = cmd;
2699         prm->tgt = cmd->tgt;
2700         prm->pkt = NULL;
2701         prm->rq_result = scsi_status;
2702         prm->sense_buffer = &cmd->sense_buffer[0];
2703         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2704         prm->sg = NULL;
2705         prm->seg_cnt = -1;
2706         prm->req_cnt = 1;
2707         prm->residual = 0;
2708         prm->add_status_pkt = 0;
2709         prm->prot_sg = NULL;
2710         prm->prot_seg_cnt = 0;
2711         prm->tot_dsds = 0;
2712
2713         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2714                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2715                         return -EAGAIN;
2716         }
2717
2718         *full_req_cnt = prm->req_cnt;
2719
2720         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2721                 prm->residual = se_cmd->residual_count;
2722                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2723                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2724                        prm->residual, se_cmd->tag,
2725                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2726                        cmd->bufflen, prm->rq_result);
2727                 prm->rq_result |= SS_RESIDUAL_UNDER;
2728         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2729                 prm->residual = se_cmd->residual_count;
2730                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2731                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2732                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2733                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2734                 prm->rq_result |= SS_RESIDUAL_OVER;
2735         }
2736
2737         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2738                 /*
2739                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2740                  * ignored in *xmit_response() below
2741                  */
2742                 if (qlt_has_data(cmd)) {
2743                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2744                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2745                             (prm->rq_result != 0))) {
2746                                 prm->add_status_pkt = 1;
2747                                 (*full_req_cnt)++;
2748                         }
2749                 }
2750         }
2751
2752         return 0;
2753 }
2754
2755 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2756     int sending_sense)
2757 {
2758         if (cmd->qpair->enable_class_2)
2759                 return 0;
2760
2761         if (sending_sense)
2762                 return cmd->conf_compl_supported;
2763         else
2764                 return cmd->qpair->enable_explicit_conf &&
2765                     cmd->conf_compl_supported;
2766 }
2767
2768 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2769         struct qla_tgt_prm *prm)
2770 {
2771         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2772             (uint32_t)sizeof(ctio->u.status1.sense_data));
2773         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2774         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2775                 ctio->u.status0.flags |= cpu_to_le16(
2776                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2777                     CTIO7_FLAGS_CONFORM_REQ);
2778         }
2779         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2780         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2781         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2782                 int i;
2783
2784                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2785                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2786                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2787                                     "Skipping EXPLICIT_CONFORM and "
2788                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2789                                     "non GOOD status\n");
2790                                 goto skip_explict_conf;
2791                         }
2792                         ctio->u.status1.flags |= cpu_to_le16(
2793                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2794                             CTIO7_FLAGS_CONFORM_REQ);
2795                 }
2796 skip_explict_conf:
2797                 ctio->u.status1.flags &=
2798                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2799                 ctio->u.status1.flags |=
2800                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2801                 ctio->u.status1.scsi_status |=
2802                     cpu_to_le16(SS_SENSE_LEN_VALID);
2803                 ctio->u.status1.sense_length =
2804                     cpu_to_le16(prm->sense_buffer_len);
2805                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2806                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2807                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2808
2809                 qlt_print_dif_err(prm);
2810
2811         } else {
2812                 ctio->u.status1.flags &=
2813                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2814                 ctio->u.status1.flags |=
2815                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2816                 ctio->u.status1.sense_length = 0;
2817                 memset(ctio->u.status1.sense_data, 0,
2818                     sizeof(ctio->u.status1.sense_data));
2819         }
2820
2821         /* Sense with len > 24, is it possible ??? */
2822 }
2823
2824 static inline int
2825 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2826 {
2827         switch (se_cmd->prot_op) {
2828         case TARGET_PROT_DOUT_INSERT:
2829         case TARGET_PROT_DIN_STRIP:
2830                 if (ql2xenablehba_err_chk >= 1)
2831                         return 1;
2832                 break;
2833         case TARGET_PROT_DOUT_PASS:
2834         case TARGET_PROT_DIN_PASS:
2835                 if (ql2xenablehba_err_chk >= 2)
2836                         return 1;
2837                 break;
2838         case TARGET_PROT_DIN_INSERT:
2839         case TARGET_PROT_DOUT_STRIP:
2840                 return 1;
2841         default:
2842                 break;
2843         }
2844         return 0;
2845 }
2846
2847 static inline int
2848 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2849 {
2850         switch (se_cmd->prot_op) {
2851         case TARGET_PROT_DIN_INSERT:
2852         case TARGET_PROT_DOUT_INSERT:
2853         case TARGET_PROT_DIN_STRIP:
2854         case TARGET_PROT_DOUT_STRIP:
2855         case TARGET_PROT_DIN_PASS:
2856         case TARGET_PROT_DOUT_PASS:
2857             return 1;
2858         default:
2859             return 0;
2860         }
2861         return 0;
2862 }
2863
2864 /*
2865  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2866  */
2867 static void
2868 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2869     uint16_t *pfw_prot_opts)
2870 {
2871         struct se_cmd *se_cmd = &cmd->se_cmd;
2872         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2873         scsi_qla_host_t *vha = cmd->tgt->vha;
2874         struct qla_hw_data *ha = vha->hw;
2875         uint32_t t32 = 0;
2876
2877         /*
2878          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2879          * have been immplemented by TCM, before AppTag is avail.
2880          * Look for modesense_handlers[]
2881          */
2882         ctx->app_tag = 0;
2883         ctx->app_tag_mask[0] = 0x0;
2884         ctx->app_tag_mask[1] = 0x0;
2885
2886         if (IS_PI_UNINIT_CAPABLE(ha)) {
2887                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2888                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2889                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2890                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2891                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2892         }
2893
2894         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2895
2896         switch (se_cmd->prot_type) {
2897         case TARGET_DIF_TYPE0_PROT:
2898                 /*
2899                  * No check for ql2xenablehba_err_chk, as it
2900                  * would be an I/O error if hba tag generation
2901                  * is not done.
2902                  */
2903                 ctx->ref_tag = cpu_to_le32(lba);
2904                 /* enable ALL bytes of the ref tag */
2905                 ctx->ref_tag_mask[0] = 0xff;
2906                 ctx->ref_tag_mask[1] = 0xff;
2907                 ctx->ref_tag_mask[2] = 0xff;
2908                 ctx->ref_tag_mask[3] = 0xff;
2909                 break;
2910         case TARGET_DIF_TYPE1_PROT:
2911             /*
2912              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
2913              * REF tag, and 16 bit app tag.
2914              */
2915             ctx->ref_tag = cpu_to_le32(lba);
2916             if (!qla_tgt_ref_mask_check(se_cmd) ||
2917                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2918                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2919                     break;
2920             }
2921             /* enable ALL bytes of the ref tag */
2922             ctx->ref_tag_mask[0] = 0xff;
2923             ctx->ref_tag_mask[1] = 0xff;
2924             ctx->ref_tag_mask[2] = 0xff;
2925             ctx->ref_tag_mask[3] = 0xff;
2926             break;
2927         case TARGET_DIF_TYPE2_PROT:
2928             /*
2929              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
2930              * tag has to match LBA in CDB + N
2931              */
2932             ctx->ref_tag = cpu_to_le32(lba);
2933             if (!qla_tgt_ref_mask_check(se_cmd) ||
2934                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
2935                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2936                     break;
2937             }
2938             /* enable ALL bytes of the ref tag */
2939             ctx->ref_tag_mask[0] = 0xff;
2940             ctx->ref_tag_mask[1] = 0xff;
2941             ctx->ref_tag_mask[2] = 0xff;
2942             ctx->ref_tag_mask[3] = 0xff;
2943             break;
2944         case TARGET_DIF_TYPE3_PROT:
2945             /* For TYPE 3 protection: 16 bit GUARD only */
2946             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
2947             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2948                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2949             break;
2950         }
2951 }
2952
2953 static inline int
2954 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
2955 {
2956         uint32_t                *cur_dsd;
2957         uint32_t                transfer_length = 0;
2958         uint32_t                data_bytes;
2959         uint32_t                dif_bytes;
2960         uint8_t                 bundling = 1;
2961         struct crc_context      *crc_ctx_pkt = NULL;
2962         struct qla_hw_data      *ha;
2963         struct ctio_crc2_to_fw  *pkt;
2964         dma_addr_t              crc_ctx_dma;
2965         uint16_t                fw_prot_opts = 0;
2966         struct qla_tgt_cmd      *cmd = prm->cmd;
2967         struct se_cmd           *se_cmd = &cmd->se_cmd;
2968         uint32_t h;
2969         struct atio_from_isp *atio = &prm->cmd->atio;
2970         struct qla_tc_param     tc;
2971         uint16_t t16;
2972         scsi_qla_host_t *vha = cmd->vha;
2973
2974         ha = vha->hw;
2975
2976         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
2977         prm->pkt = pkt;
2978         memset(pkt, 0, sizeof(*pkt));
2979
2980         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
2981                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2982                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2983                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2984
2985         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2986             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2987                 bundling = 0;
2988
2989         /* Compute dif len and adjust data len to incude protection */
2990         data_bytes = cmd->bufflen;
2991         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2992
2993         switch (se_cmd->prot_op) {
2994         case TARGET_PROT_DIN_INSERT:
2995         case TARGET_PROT_DOUT_STRIP:
2996                 transfer_length = data_bytes;
2997                 if (cmd->prot_sg_cnt)
2998                         data_bytes += dif_bytes;
2999                 break;
3000         case TARGET_PROT_DIN_STRIP:
3001         case TARGET_PROT_DOUT_INSERT:
3002         case TARGET_PROT_DIN_PASS:
3003         case TARGET_PROT_DOUT_PASS:
3004                 transfer_length = data_bytes + dif_bytes;
3005                 break;
3006         default:
3007                 BUG();
3008                 break;
3009         }
3010
3011         if (!qlt_hba_err_chk_enabled(se_cmd))
3012                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3013         /* HBA error checking enabled */
3014         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3015                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3016                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3017                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3018                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3019                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3020         }
3021
3022         switch (se_cmd->prot_op) {
3023         case TARGET_PROT_DIN_INSERT:
3024         case TARGET_PROT_DOUT_INSERT:
3025                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3026                 break;
3027         case TARGET_PROT_DIN_STRIP:
3028         case TARGET_PROT_DOUT_STRIP:
3029                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3030                 break;
3031         case TARGET_PROT_DIN_PASS:
3032         case TARGET_PROT_DOUT_PASS:
3033                 fw_prot_opts |= PO_MODE_DIF_PASS;
3034                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3035                 break;
3036         default:/* Normal Request */
3037                 fw_prot_opts |= PO_MODE_DIF_PASS;
3038                 break;
3039         }
3040
3041         /* ---- PKT ---- */
3042         /* Update entry type to indicate Command Type CRC_2 IOCB */
3043         pkt->entry_type  = CTIO_CRC2;
3044         pkt->entry_count = 1;
3045         pkt->vp_index = cmd->vp_idx;
3046
3047         h = qlt_make_handle(qpair);
3048         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3049                 /*
3050                  * CTIO type 7 from the firmware doesn't provide a way to
3051                  * know the initiator's LOOP ID, hence we can't find
3052                  * the session and, so, the command.
3053                  */
3054                 return -EAGAIN;
3055         } else
3056                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3057
3058         pkt->handle  = MAKE_HANDLE(qpair->req->id, h);
3059         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3060         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3061         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3062         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3063         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3064         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3065         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3066
3067         /* silence compile warning */
3068         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3069         pkt->ox_id  = cpu_to_le16(t16);
3070
3071         t16 = (atio->u.isp24.attr << 9);
3072         pkt->flags |= cpu_to_le16(t16);
3073         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3074
3075         /* Set transfer direction */
3076         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3077                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3078         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3079                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3080
3081         pkt->dseg_count = prm->tot_dsds;
3082         /* Fibre channel byte count */
3083         pkt->transfer_length = cpu_to_le32(transfer_length);
3084
3085         /* ----- CRC context -------- */
3086
3087         /* Allocate CRC context from global pool */
3088         crc_ctx_pkt = cmd->ctx =
3089             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3090
3091         if (!crc_ctx_pkt)
3092                 goto crc_queuing_error;
3093
3094         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3095         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3096
3097         /* Set handle */
3098         crc_ctx_pkt->handle = pkt->handle;
3099
3100         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3101
3102         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
3103         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
3104         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
3105
3106         if (!bundling) {
3107                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
3108         } else {
3109                 /*
3110                  * Configure Bundling if we need to fetch interlaving
3111                  * protection PCI accesses
3112                  */
3113                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3114                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3115                 crc_ctx_pkt->u.bundling.dseg_count =
3116                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3117                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
3118         }
3119
3120         /* Finish the common fields of CRC pkt */
3121         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3122         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3123         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3124         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3125
3126         memset((uint8_t *)&tc, 0 , sizeof(tc));
3127         tc.vha = vha;
3128         tc.blk_sz = cmd->blk_sz;
3129         tc.bufflen = cmd->bufflen;
3130         tc.sg = cmd->sg;
3131         tc.prot_sg = cmd->prot_sg;
3132         tc.ctx = crc_ctx_pkt;
3133         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3134
3135         /* Walks data segments */
3136         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3137
3138         if (!bundling && prm->prot_seg_cnt) {
3139                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3140                         prm->tot_dsds, &tc))
3141                         goto crc_queuing_error;
3142         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3143                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3144                 goto crc_queuing_error;
3145
3146         if (bundling && prm->prot_seg_cnt) {
3147                 /* Walks dif segments */
3148                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3149
3150                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
3151                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3152                         prm->prot_seg_cnt, &tc))
3153                         goto crc_queuing_error;
3154         }
3155         return QLA_SUCCESS;
3156
3157 crc_queuing_error:
3158         /* Cleanup will be performed by the caller */
3159         qpair->req->outstanding_cmds[h] = NULL;
3160
3161         return QLA_FUNCTION_FAILED;
3162 }
3163
3164 /*
3165  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3166  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3167  */
3168 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3169         uint8_t scsi_status)
3170 {
3171         struct scsi_qla_host *vha = cmd->vha;
3172         struct qla_qpair *qpair = cmd->qpair;
3173         struct ctio7_to_24xx *pkt;
3174         struct qla_tgt_prm prm;
3175         uint32_t full_req_cnt = 0;
3176         unsigned long flags = 0;
3177         int res;
3178
3179         if (cmd->sess && cmd->sess->deleted) {
3180                 cmd->state = QLA_TGT_STATE_PROCESSED;
3181                 if (cmd->sess->logout_completed)
3182                         /* no need to terminate. FW already freed exchange. */
3183                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3184                 else
3185                         qlt_send_term_exchange(qpair, cmd, &cmd->atio, 0, 0);
3186                 return 0;
3187         }
3188
3189         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3190             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3191             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3192             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3193             &cmd->se_cmd, qpair->id);
3194
3195         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3196             &full_req_cnt);
3197         if (unlikely(res != 0)) {
3198                 return res;
3199         }
3200
3201         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3202
3203         if (xmit_type == QLA_TGT_XMIT_STATUS)
3204                 qpair->tgt_counters.core_qla_snd_status++;
3205         else
3206                 qpair->tgt_counters.core_qla_que_buf++;
3207
3208         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3209                 /*
3210                  * Either the port is not online or this request was from
3211                  * previous life, just abort the processing.
3212                  */
3213                 cmd->state = QLA_TGT_STATE_PROCESSED;
3214                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3215                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3216                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3217                         vha->flags.online, qla2x00_reset_active(vha),
3218                         cmd->reset_count, qpair->chip_reset);
3219                 res = 0;
3220                 goto out_unmap_unlock;
3221         }
3222
3223         /* Does F/W have an IOCBs for this request */
3224         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3225         if (unlikely(res))
3226                 goto out_unmap_unlock;
3227
3228         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3229                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3230         else
3231                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3232         if (unlikely(res != 0)) {
3233                 qpair->req->cnt += full_req_cnt;
3234                 goto out_unmap_unlock;
3235         }
3236
3237         pkt = (struct ctio7_to_24xx *)prm.pkt;
3238
3239         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3240                 pkt->u.status0.flags |=
3241                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3242                         CTIO7_FLAGS_STATUS_MODE_0);
3243
3244                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3245                         qlt_load_data_segments(&prm);
3246
3247                 if (prm.add_status_pkt == 0) {
3248                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3249                                 pkt->u.status0.scsi_status =
3250                                     cpu_to_le16(prm.rq_result);
3251                                 pkt->u.status0.residual =
3252                                     cpu_to_le32(prm.residual);
3253                                 pkt->u.status0.flags |= cpu_to_le16(
3254                                     CTIO7_FLAGS_SEND_STATUS);
3255                                 if (qlt_need_explicit_conf(cmd, 0)) {
3256                                         pkt->u.status0.flags |=
3257                                             cpu_to_le16(
3258                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3259                                                 CTIO7_FLAGS_CONFORM_REQ);
3260                                 }
3261                         }
3262
3263                 } else {
3264                         /*
3265                          * We have already made sure that there is sufficient
3266                          * amount of request entries to not drop HW lock in
3267                          * req_pkt().
3268                          */
3269                         struct ctio7_to_24xx *ctio =
3270                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3271                                     qpair->req);
3272
3273                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3274                             "Building additional status packet 0x%p.\n",
3275                             ctio);
3276
3277                         /*
3278                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3279                          * ctio7_to_24xx
3280                          */
3281                         memcpy(ctio, pkt, sizeof(*ctio));
3282                         /* reset back to CTIO7 */
3283                         ctio->entry_count = 1;
3284                         ctio->entry_type = CTIO_TYPE7;
3285                         ctio->dseg_count = 0;
3286                         ctio->u.status1.flags &= ~cpu_to_le16(
3287                             CTIO7_FLAGS_DATA_IN);
3288
3289                         /* Real finish is ctio_m1's finish */
3290                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3291                         pkt->u.status0.flags |= cpu_to_le16(
3292                             CTIO7_FLAGS_DONT_RET_CTIO);
3293
3294                         /* qlt_24xx_init_ctio_to_isp will correct
3295                          * all neccessary fields that's part of CTIO7.
3296                          * There should be no residual of CTIO-CRC2 data.
3297                          */
3298                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3299                             &prm);
3300                 }
3301         } else
3302                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3303
3304
3305         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3306         cmd->cmd_sent_to_fw = 1;
3307
3308         /* Memory Barrier */
3309         wmb();
3310         if (qpair->reqq_start_iocbs)
3311                 qpair->reqq_start_iocbs(qpair);
3312         else
3313                 qla2x00_start_iocbs(vha, qpair->req);
3314         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3315
3316         return 0;
3317
3318 out_unmap_unlock:
3319         qlt_unmap_sg(vha, cmd);
3320         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3321
3322         return res;
3323 }
3324 EXPORT_SYMBOL(qlt_xmit_response);
3325
3326 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3327 {
3328         struct ctio7_to_24xx *pkt;
3329         struct scsi_qla_host *vha = cmd->vha;
3330         struct qla_tgt *tgt = cmd->tgt;
3331         struct qla_tgt_prm prm;
3332         unsigned long flags = 0;
3333         int res = 0;
3334         struct qla_qpair *qpair = cmd->qpair;
3335
3336         memset(&prm, 0, sizeof(prm));
3337         prm.cmd = cmd;
3338         prm.tgt = tgt;
3339         prm.sg = NULL;
3340         prm.req_cnt = 1;
3341
3342         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3343             (cmd->sess && cmd->sess->deleted)) {
3344                 /*
3345                  * Either the port is not online or this request was from
3346                  * previous life, just abort the processing.
3347                  */
3348                 cmd->state = QLA_TGT_STATE_NEED_DATA;
3349                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
3350                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3351                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3352                         vha->flags.online, qla2x00_reset_active(vha),
3353                         cmd->reset_count, qpair->chip_reset);
3354                 return 0;
3355         }
3356
3357         /* Calculate number of entries and segments required */
3358         if (qlt_pci_map_calc_cnt(&prm) != 0)
3359                 return -EAGAIN;
3360
3361         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3362         /* Does F/W have an IOCBs for this request */
3363         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3364         if (res != 0)
3365                 goto out_unlock_free_unmap;
3366         if (cmd->se_cmd.prot_op)
3367                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3368         else
3369                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3370
3371         if (unlikely(res != 0)) {
3372                 qpair->req->cnt += prm.req_cnt;
3373                 goto out_unlock_free_unmap;
3374         }
3375
3376         pkt = (struct ctio7_to_24xx *)prm.pkt;
3377         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3378             CTIO7_FLAGS_STATUS_MODE_0);
3379
3380         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3381                 qlt_load_data_segments(&prm);
3382
3383         cmd->state = QLA_TGT_STATE_NEED_DATA;
3384         cmd->cmd_sent_to_fw = 1;
3385
3386         /* Memory Barrier */
3387         wmb();
3388         if (qpair->reqq_start_iocbs)
3389                 qpair->reqq_start_iocbs(qpair);
3390         else
3391                 qla2x00_start_iocbs(vha, qpair->req);
3392         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3393
3394         return res;
3395
3396 out_unlock_free_unmap:
3397         qlt_unmap_sg(vha, cmd);
3398         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3399
3400         return res;
3401 }
3402 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3403
3404
3405 /*
3406  * it is assumed either hardware_lock or qpair lock is held.
3407  */
3408 static void
3409 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3410         struct ctio_crc_from_fw *sts)
3411 {
3412         uint8_t         *ap = &sts->actual_dif[0];
3413         uint8_t         *ep = &sts->expected_dif[0];
3414         uint64_t        lba = cmd->se_cmd.t_task_lba;
3415         uint8_t scsi_status, sense_key, asc, ascq;
3416         unsigned long flags;
3417         struct scsi_qla_host *vha = cmd->vha;
3418
3419         cmd->trc_flags |= TRC_DIF_ERR;
3420
3421         cmd->a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
3422         cmd->a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
3423         cmd->a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
3424
3425         cmd->e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
3426         cmd->e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
3427         cmd->e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
3428
3429         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3430             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3431
3432         scsi_status = sense_key = asc = ascq = 0;
3433
3434         /* check appl tag */
3435         if (cmd->e_app_tag != cmd->a_app_tag) {
3436                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3437                     "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3438                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3439                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3440                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3441                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3442
3443                 cmd->dif_err_code = DIF_ERR_APP;
3444                 scsi_status = SAM_STAT_CHECK_CONDITION;
3445                 sense_key = ABORTED_COMMAND;
3446                 asc = 0x10;
3447                 ascq = 0x2;
3448         }
3449
3450         /* check ref tag */
3451         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3452                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3453                     "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard[%x|%x] cmd=%p ox_id[%04x] ",
3454                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3455                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3456                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3457                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3458
3459                 cmd->dif_err_code = DIF_ERR_REF;
3460                 scsi_status = SAM_STAT_CHECK_CONDITION;
3461                 sense_key = ABORTED_COMMAND;
3462                 asc = 0x10;
3463                 ascq = 0x3;
3464                 goto out;
3465         }
3466
3467         /* check guard */
3468         if (cmd->e_guard != cmd->a_guard) {
3469                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3470                     "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3471                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3472                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3473                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3474                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3475
3476                 cmd->dif_err_code = DIF_ERR_GRD;
3477                 scsi_status = SAM_STAT_CHECK_CONDITION;
3478                 sense_key = ABORTED_COMMAND;
3479                 asc = 0x10;
3480                 ascq = 0x1;
3481         }
3482 out:
3483         switch (cmd->state) {
3484         case QLA_TGT_STATE_NEED_DATA:
3485                 /* handle_data will load DIF error code  */
3486                 cmd->state = QLA_TGT_STATE_DATA_IN;
3487                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3488                 break;
3489         default:
3490                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3491                 if (cmd->aborted) {
3492                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3493                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3494                         break;
3495                 }
3496                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3497
3498                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3499                     ascq);
3500                 /* assume scsi status gets out on the wire.
3501                  * Will not wait for completion.
3502                  */
3503                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3504                 break;
3505         }
3506 }
3507
3508 /* If hardware_lock held on entry, might drop it, then reaquire */
3509 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3510 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3511         struct imm_ntfy_from_isp *ntfy)
3512 {
3513         struct nack_to_isp *nack;
3514         struct qla_hw_data *ha = vha->hw;
3515         request_t *pkt;
3516         int ret = 0;
3517
3518         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3519             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3520
3521         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3522         if (pkt == NULL) {
3523                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3524                     "qla_target(%d): %s failed: unable to allocate "
3525                     "request packet\n", vha->vp_idx, __func__);
3526                 return -ENOMEM;
3527         }
3528
3529         pkt->entry_type = NOTIFY_ACK_TYPE;
3530         pkt->entry_count = 1;
3531         pkt->handle = QLA_TGT_SKIP_HANDLE;
3532
3533         nack = (struct nack_to_isp *)pkt;
3534         nack->ox_id = ntfy->ox_id;
3535
3536         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3537         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3538                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3539                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
3540         }
3541
3542         /* terminate */
3543         nack->u.isp24.flags |=
3544                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3545
3546         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3547         nack->u.isp24.status = ntfy->u.isp24.status;
3548         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3549         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3550         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3551         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3552         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3553         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3554
3555         qla2x00_start_iocbs(vha, vha->req);
3556         return ret;
3557 }
3558
3559 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3560         struct imm_ntfy_from_isp *imm, int ha_locked)
3561 {
3562         unsigned long flags = 0;
3563         int rc;
3564
3565         if (ha_locked) {
3566                 rc = __qlt_send_term_imm_notif(vha, imm);
3567
3568 #if 0   /* Todo  */
3569                 if (rc == -ENOMEM)
3570                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3571 #else
3572                 if (rc) {
3573                 }
3574 #endif
3575                 goto done;
3576         }
3577
3578         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3579         rc = __qlt_send_term_imm_notif(vha, imm);
3580
3581 #if 0   /* Todo */
3582         if (rc == -ENOMEM)
3583                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
3584 #endif
3585
3586 done:
3587         if (!ha_locked)
3588                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3589 }
3590
3591 /*
3592  * If hardware_lock held on entry, might drop it, then reaquire
3593  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3594  */
3595 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3596         struct qla_tgt_cmd *cmd,
3597         struct atio_from_isp *atio)
3598 {
3599         struct scsi_qla_host *vha = qpair->vha;
3600         struct ctio7_to_24xx *ctio24;
3601         struct qla_hw_data *ha = vha->hw;
3602         request_t *pkt;
3603         int ret = 0;
3604         uint16_t temp;
3605
3606         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3607
3608         if (cmd)
3609                 vha = cmd->vha;
3610
3611         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3612         if (pkt == NULL) {
3613                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3614                     "qla_target(%d): %s failed: unable to allocate "
3615                     "request packet\n", vha->vp_idx, __func__);
3616                 return -ENOMEM;
3617         }
3618
3619         if (cmd != NULL) {
3620                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3621                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3622                             "qla_target(%d): Terminating cmd %p with "
3623                             "incorrect state %d\n", vha->vp_idx, cmd,
3624                             cmd->state);
3625                 } else
3626                         ret = 1;
3627         }
3628
3629         qpair->tgt_counters.num_term_xchg_sent++;
3630         pkt->entry_count = 1;
3631         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3632
3633         ctio24 = (struct ctio7_to_24xx *)pkt;
3634         ctio24->entry_type = CTIO_TYPE7;
3635         ctio24->nport_handle = CTIO7_NHANDLE_UNRECOGNIZED;
3636         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3637         ctio24->vp_index = vha->vp_idx;
3638         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3639         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3640         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3641         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3642         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3643                 CTIO7_FLAGS_TERMINATE;
3644         ctio24->u.status1.flags = cpu_to_le16(temp);
3645         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3646         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3647
3648         /* Memory Barrier */
3649         wmb();
3650         if (qpair->reqq_start_iocbs)
3651                 qpair->reqq_start_iocbs(qpair);
3652         else
3653                 qla2x00_start_iocbs(vha, qpair->req);
3654         return ret;
3655 }
3656
3657 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3658         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3659         int ul_abort)
3660 {
3661         struct scsi_qla_host *vha;
3662         unsigned long flags = 0;
3663         int rc;
3664
3665         /* why use different vha? NPIV */
3666         if (cmd)
3667                 vha = cmd->vha;
3668         else
3669                 vha = qpair->vha;
3670
3671         if (ha_locked) {
3672                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3673                 if (rc == -ENOMEM)
3674                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3675                 goto done;
3676         }
3677         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3678         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3679         if (rc == -ENOMEM)
3680                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3681
3682 done:
3683         if (cmd && !ul_abort && !cmd->aborted) {
3684                 if (cmd->sg_mapped)
3685                         qlt_unmap_sg(vha, cmd);
3686                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3687         }
3688
3689         if (!ha_locked)
3690                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3691
3692         return;
3693 }
3694
3695 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3696 {
3697         struct list_head free_list;
3698         struct qla_tgt_cmd *cmd, *tcmd;
3699
3700         vha->hw->tgt.leak_exchg_thresh_hold =
3701             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3702
3703         cmd = tcmd = NULL;
3704         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3705                 INIT_LIST_HEAD(&free_list);
3706                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3707
3708                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3709                         list_del(&cmd->cmd_list);
3710                         /* This cmd was never sent to TCM.  There is no need
3711                          * to schedule free or call free_cmd
3712                          */
3713                         qlt_free_cmd(cmd);
3714                         vha->hw->tgt.num_qfull_cmds_alloc--;
3715                 }
3716         }
3717         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3718 }
3719
3720 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3721 {
3722         uint32_t total_leaked;
3723
3724         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3725
3726         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3727             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3728
3729                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3730                     "Chip reset due to exchange starvation: %d/%d.\n",
3731                     total_leaked, vha->hw->cur_fw_xcb_count);
3732
3733                 if (IS_P3P_TYPE(vha->hw))
3734                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3735                 else
3736                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3737                 qla2xxx_wake_dpc(vha);
3738         }
3739
3740 }
3741
3742 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3743 {
3744         struct qla_tgt *tgt = cmd->tgt;
3745         struct scsi_qla_host *vha = tgt->vha;
3746         struct se_cmd *se_cmd = &cmd->se_cmd;
3747         unsigned long flags;
3748
3749         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3750             "qla_target(%d): terminating exchange for aborted cmd=%p "
3751             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3752             se_cmd->tag);
3753
3754         spin_lock_irqsave(&cmd->cmd_lock, flags);
3755         if (cmd->aborted) {
3756                 if (cmd->sg_mapped)
3757                         qlt_unmap_sg(vha, cmd);
3758
3759                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3760                 /*
3761                  * It's normal to see 2 calls in this path:
3762                  *  1) XFER Rdy completion + CMD_T_ABORT
3763                  *  2) TCM TMR - drain_state_list
3764                  */
3765                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3766                     "multiple abort. %p transport_state %x, t_state %x, "
3767                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3768                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3769                 return EIO;
3770         }
3771         cmd->aborted = 1;
3772         cmd->trc_flags |= TRC_ABORT;
3773         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3774
3775         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3776         return 0;
3777 }
3778 EXPORT_SYMBOL(qlt_abort_cmd);
3779
3780 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3781 {
3782         struct fc_port *sess = cmd->sess;
3783
3784         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3785             "%s: se_cmd[%p] ox_id %04x\n",
3786             __func__, &cmd->se_cmd,
3787             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3788
3789         BUG_ON(cmd->cmd_in_wq);
3790
3791         if (!cmd->q_full)
3792                 qlt_decr_num_pend_cmds(cmd->vha);
3793
3794         BUG_ON(cmd->sg_mapped);
3795         cmd->jiffies_at_free = get_jiffies_64();
3796         if (unlikely(cmd->free_sg))
3797                 kfree(cmd->sg);
3798
3799         if (!sess || !sess->se_sess) {
3800                 WARN_ON(1);
3801                 return;
3802         }
3803         cmd->jiffies_at_free = get_jiffies_64();
3804         target_free_tag(sess->se_sess, &cmd->se_cmd);
3805 }
3806 EXPORT_SYMBOL(qlt_free_cmd);
3807
3808 /*
3809  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3810  */
3811 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3812         struct qla_tgt_cmd *cmd, uint32_t status)
3813 {
3814         int term = 0;
3815         struct scsi_qla_host *vha = qpair->vha;
3816
3817         if (cmd->se_cmd.prot_op)
3818                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3819                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3820                     "se_cmd=%p tag[%x] op %#x/%s",
3821                      cmd->lba, cmd->lba,
3822                      cmd->num_blks, &cmd->se_cmd,
3823                      cmd->atio.u.isp24.exchange_addr,
3824                      cmd->se_cmd.prot_op,
3825                      prot_op_str(cmd->se_cmd.prot_op));
3826
3827         if (ctio != NULL) {
3828                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3829                 term = !(c->flags &
3830                     cpu_to_le16(OF_TERM_EXCH));
3831         } else
3832                 term = 1;
3833
3834         if (term)
3835                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3836
3837         return term;
3838 }
3839
3840
3841 /* ha->hardware_lock supposed to be held on entry */
3842 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3843         struct rsp_que *rsp, uint32_t handle, void *ctio)
3844 {
3845         struct qla_tgt_cmd *cmd = NULL;
3846         struct req_que *req;
3847         int qid = GET_QID(handle);
3848         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3849
3850         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3851                 return NULL;
3852
3853         if (qid == rsp->req->id) {
3854                 req = rsp->req;
3855         } else if (vha->hw->req_q_map[qid]) {
3856                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3857                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3858                     vha->vp_idx, rsp->id, handle);
3859                 req = vha->hw->req_q_map[qid];
3860         } else {
3861                 return NULL;
3862         }
3863
3864         h &= QLA_CMD_HANDLE_MASK;
3865
3866         if (h != QLA_TGT_NULL_HANDLE) {
3867                 if (unlikely(h >= req->num_outstanding_cmds)) {
3868                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3869                             "qla_target(%d): Wrong handle %x received\n",
3870                             vha->vp_idx, handle);
3871                         return NULL;
3872                 }
3873
3874                 cmd = (struct qla_tgt_cmd *)req->outstanding_cmds[h];
3875                 if (unlikely(cmd == NULL)) {
3876                         ql_dbg(ql_dbg_async, vha, 0xe053,
3877                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3878                                 vha->vp_idx, handle, req->id, rsp->id);
3879                         return NULL;
3880                 }
3881                 req->outstanding_cmds[h] = NULL;
3882         } else if (ctio != NULL) {
3883                 /* We can't get loop ID from CTIO7 */
3884                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3885                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3886                     "support NULL handles\n", vha->vp_idx);
3887                 return NULL;
3888         }
3889
3890         return cmd;
3891 }
3892
3893 /* hardware_lock should be held by caller. */
3894 void
3895 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3896 {
3897         struct qla_hw_data *ha = vha->hw;
3898
3899         if (cmd->sg_mapped)
3900                 qlt_unmap_sg(vha, cmd);
3901
3902         /* TODO: fix debug message type and ids. */
3903         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3904                 ql_dbg(ql_dbg_io, vha, 0xff00,
3905                     "HOST-ABORT: state=PROCESSED.\n");
3906         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3907                 cmd->write_data_transferred = 0;
3908                 cmd->state = QLA_TGT_STATE_DATA_IN;
3909
3910                 ql_dbg(ql_dbg_io, vha, 0xff01,
3911                     "HOST-ABORT: state=DATA_IN.\n");
3912
3913                 ha->tgt.tgt_ops->handle_data(cmd);
3914                 return;
3915         } else {
3916                 ql_dbg(ql_dbg_io, vha, 0xff03,
3917                     "HOST-ABORT: state=BAD(%d).\n",
3918                     cmd->state);
3919                 dump_stack();
3920         }
3921
3922         cmd->trc_flags |= TRC_FLUSH;
3923         ha->tgt.tgt_ops->free_cmd(cmd);
3924 }
3925
3926 /*
3927  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3928  */
3929 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3930     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3931 {
3932         struct qla_hw_data *ha = vha->hw;
3933         struct se_cmd *se_cmd;
3934         struct qla_tgt_cmd *cmd;
3935         struct qla_qpair *qpair = rsp->qpair;
3936
3937         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3938                 /* That could happen only in case of an error/reset/abort */
3939                 if (status != CTIO_SUCCESS) {
3940                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3941                             "Intermediate CTIO received"
3942                             " (status %x)\n", status);
3943                 }
3944                 return;
3945         }
3946
3947         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3948         if (cmd == NULL)
3949                 return;
3950
3951         se_cmd = &cmd->se_cmd;
3952         cmd->cmd_sent_to_fw = 0;
3953
3954         qlt_unmap_sg(vha, cmd);
3955
3956         if (unlikely(status != CTIO_SUCCESS)) {
3957                 switch (status & 0xFFFF) {
3958                 case CTIO_LIP_RESET:
3959                 case CTIO_TARGET_RESET:
3960                 case CTIO_ABORTED:
3961                         /* driver request abort via Terminate exchange */
3962                 case CTIO_TIMEOUT:
3963                 case CTIO_INVALID_RX_ID:
3964                         /* They are OK */
3965                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3966                             "qla_target(%d): CTIO with "
3967                             "status %#x received, state %x, se_cmd %p, "
3968                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3969                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3970                             status, cmd->state, se_cmd);
3971                         break;
3972
3973                 case CTIO_PORT_LOGGED_OUT:
3974                 case CTIO_PORT_UNAVAILABLE:
3975                 {
3976                         int logged_out =
3977                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
3978
3979                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3980                             "qla_target(%d): CTIO with %s status %x "
3981                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3982                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
3983                             status, cmd->state, se_cmd);
3984
3985                         if (logged_out && cmd->sess) {
3986                                 /*
3987                                  * Session is already logged out, but we need
3988                                  * to notify initiator, who's not aware of this
3989                                  */
3990                                 cmd->sess->logout_on_delete = 0;
3991                                 cmd->sess->send_els_logo = 1;
3992                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
3993                                     "%s %d %8phC post del sess\n",
3994                                     __func__, __LINE__, cmd->sess->port_name);
3995
3996                                 qlt_schedule_sess_for_deletion(cmd->sess);
3997                         }
3998                         break;
3999                 }
4000                 case CTIO_DIF_ERROR: {
4001                         struct ctio_crc_from_fw *crc =
4002                                 (struct ctio_crc_from_fw *)ctio;
4003                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
4004                             "qla_target(%d): CTIO with DIF_ERROR status %x "
4005                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
4006                             "expect_dif[0x%llx]\n",
4007                             vha->vp_idx, status, cmd->state, se_cmd,
4008                             *((u64 *)&crc->actual_dif[0]),
4009                             *((u64 *)&crc->expected_dif[0]));
4010
4011                         qlt_handle_dif_error(qpair, cmd, ctio);
4012                         return;
4013                 }
4014                 default:
4015                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4016                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4017                             vha->vp_idx, status, cmd->state, se_cmd);
4018                         break;
4019                 }
4020
4021
4022                 /* "cmd->aborted" means
4023                  * cmd is already aborted/terminated, we don't
4024                  * need to terminate again.  The exchange is already
4025                  * cleaned up/freed at FW level.  Just cleanup at driver
4026                  * level.
4027                  */
4028                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4029                     (!cmd->aborted)) {
4030                         cmd->trc_flags |= TRC_CTIO_ERR;
4031                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4032                                 return;
4033                 }
4034         }
4035
4036         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4037                 cmd->trc_flags |= TRC_CTIO_DONE;
4038         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4039                 cmd->state = QLA_TGT_STATE_DATA_IN;
4040
4041                 if (status == CTIO_SUCCESS)
4042                         cmd->write_data_transferred = 1;
4043
4044                 ha->tgt.tgt_ops->handle_data(cmd);
4045                 return;
4046         } else if (cmd->aborted) {
4047                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4048                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4049                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4050         } else {
4051                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4052                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4053                     "qla_target(%d): A command in state (%d) should "
4054                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4055         }
4056
4057         if (unlikely(status != CTIO_SUCCESS) &&
4058                 !cmd->aborted) {
4059                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4060                 dump_stack();
4061         }
4062
4063         ha->tgt.tgt_ops->free_cmd(cmd);
4064 }
4065
4066 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4067         uint8_t task_codes)
4068 {
4069         int fcp_task_attr;
4070
4071         switch (task_codes) {
4072         case ATIO_SIMPLE_QUEUE:
4073                 fcp_task_attr = TCM_SIMPLE_TAG;
4074                 break;
4075         case ATIO_HEAD_OF_QUEUE:
4076                 fcp_task_attr = TCM_HEAD_TAG;
4077                 break;
4078         case ATIO_ORDERED_QUEUE:
4079                 fcp_task_attr = TCM_ORDERED_TAG;
4080                 break;
4081         case ATIO_ACA_QUEUE:
4082                 fcp_task_attr = TCM_ACA_TAG;
4083                 break;
4084         case ATIO_UNTAGGED:
4085                 fcp_task_attr = TCM_SIMPLE_TAG;
4086                 break;
4087         default:
4088                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4089                     "qla_target: unknown task code %x, use ORDERED instead\n",
4090                     task_codes);
4091                 fcp_task_attr = TCM_ORDERED_TAG;
4092                 break;
4093         }
4094
4095         return fcp_task_attr;
4096 }
4097
4098 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *,
4099                                         uint8_t *);
4100 /*
4101  * Process context for I/O path into tcm_qla2xxx code
4102  */
4103 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4104 {
4105         scsi_qla_host_t *vha = cmd->vha;
4106         struct qla_hw_data *ha = vha->hw;
4107         struct fc_port *sess = cmd->sess;
4108         struct atio_from_isp *atio = &cmd->atio;
4109         unsigned char *cdb;
4110         unsigned long flags;
4111         uint32_t data_length;
4112         int ret, fcp_task_attr, data_dir, bidi = 0;
4113         struct qla_qpair *qpair = cmd->qpair;
4114
4115         cmd->cmd_in_wq = 0;
4116         cmd->trc_flags |= TRC_DO_WORK;
4117
4118         if (cmd->aborted) {
4119                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4120                     "cmd with tag %u is aborted\n",
4121                     cmd->atio.u.isp24.exchange_addr);
4122                 goto out_term;
4123         }
4124
4125         spin_lock_init(&cmd->cmd_lock);
4126         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4127         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
4128
4129         if (atio->u.isp24.fcp_cmnd.rddata &&
4130             atio->u.isp24.fcp_cmnd.wrdata) {
4131                 bidi = 1;
4132                 data_dir = DMA_TO_DEVICE;
4133         } else if (atio->u.isp24.fcp_cmnd.rddata)
4134                 data_dir = DMA_FROM_DEVICE;
4135         else if (atio->u.isp24.fcp_cmnd.wrdata)
4136                 data_dir = DMA_TO_DEVICE;
4137         else
4138                 data_dir = DMA_NONE;
4139
4140         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4141             atio->u.isp24.fcp_cmnd.task_attr);
4142         data_length = get_datalen_for_atio(atio);
4143
4144         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4145                                           fcp_task_attr, data_dir, bidi);
4146         if (ret != 0)
4147                 goto out_term;
4148         /*
4149          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
4150          */
4151         ha->tgt.tgt_ops->put_sess(sess);
4152         return;
4153
4154 out_term:
4155         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4156         /*
4157          * cmd has not sent to target yet, so pass NULL as the second
4158          * argument to qlt_send_term_exchange() and free the memory here.
4159          */
4160         cmd->trc_flags |= TRC_DO_WORK_ERR;
4161         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4162         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4163
4164         qlt_decr_num_pend_cmds(vha);
4165         target_free_tag(sess->se_sess, &cmd->se_cmd);
4166         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4167
4168         ha->tgt.tgt_ops->put_sess(sess);
4169 }
4170
4171 static void qlt_do_work(struct work_struct *work)
4172 {
4173         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4174         scsi_qla_host_t *vha = cmd->vha;
4175         unsigned long flags;
4176
4177         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4178         list_del(&cmd->cmd_list);
4179         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4180
4181         __qlt_do_work(cmd);
4182 }
4183
4184 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4185 {
4186         unsigned long flags;
4187         struct qla_hw_data *ha = vha->hw;
4188         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4189         void *node;
4190         u64 key = 0;
4191
4192         ql_log(ql_log_info, vha, 0x706c,
4193             "User update Number of Active Qpairs %d\n",
4194             ha->tgt.num_act_qpairs);
4195
4196         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4197
4198         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4199                 btree_remove64(&tgt->lun_qpair_map, key);
4200
4201         ha->base_qpair->lun_cnt = 0;
4202         for (key = 0; key < ha->max_qpairs; key++)
4203                 if (ha->queue_pair_map[key])
4204                         ha->queue_pair_map[key]->lun_cnt = 0;
4205
4206         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4207 }
4208
4209 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4210         struct qla_tgt_cmd *cmd)
4211 {
4212         struct qla_qpair *qpair, *qp;
4213         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4214         struct qla_qpair_hint *h;
4215
4216         if (vha->flags.qpairs_available) {
4217                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4218                 if (unlikely(!h)) {
4219                         /* spread lun to qpair ratio evently */
4220                         int lcnt = 0, rc;
4221                         struct scsi_qla_host *base_vha =
4222                                 pci_get_drvdata(vha->hw->pdev);
4223
4224                         qpair = vha->hw->base_qpair;
4225                         if (qpair->lun_cnt == 0) {
4226                                 qpair->lun_cnt++;
4227                                 h = qla_qpair_to_hint(tgt, qpair);
4228                                 BUG_ON(!h);
4229                                 rc = btree_insert64(&tgt->lun_qpair_map,
4230                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4231                                 if (rc) {
4232                                         qpair->lun_cnt--;
4233                                         ql_log(ql_log_info, vha, 0xd037,
4234                                             "Unable to insert lun %llx into lun_qpair_map\n",
4235                                             cmd->unpacked_lun);
4236                                 }
4237                                 goto out;
4238                         } else {
4239                                 lcnt = qpair->lun_cnt;
4240                         }
4241
4242                         h = NULL;
4243                         list_for_each_entry(qp, &base_vha->qp_list,
4244                             qp_list_elem) {
4245                                 if (qp->lun_cnt == 0) {
4246                                         qp->lun_cnt++;
4247                                         h = qla_qpair_to_hint(tgt, qp);
4248                                         BUG_ON(!h);
4249                                         rc = btree_insert64(&tgt->lun_qpair_map,
4250                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4251                                         if (rc) {
4252                                                 qp->lun_cnt--;
4253                                                 ql_log(ql_log_info, vha, 0xd038,
4254                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4255                                                         cmd->unpacked_lun);
4256                                         }
4257                                         qpair = qp;
4258                                         goto out;
4259                                 } else {
4260                                         if (qp->lun_cnt < lcnt) {
4261                                                 lcnt = qp->lun_cnt;
4262                                                 qpair = qp;
4263                                                 continue;
4264                                         }
4265                                 }
4266                         }
4267                         BUG_ON(!qpair);
4268                         qpair->lun_cnt++;
4269                         h = qla_qpair_to_hint(tgt, qpair);
4270                         BUG_ON(!h);
4271                         rc = btree_insert64(&tgt->lun_qpair_map,
4272                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4273                         if (rc) {
4274                                 qpair->lun_cnt--;
4275                                 ql_log(ql_log_info, vha, 0xd039,
4276                                    "Unable to insert lun %llx into lun_qpair_map\n",
4277                                    cmd->unpacked_lun);
4278                         }
4279                 }
4280         } else {
4281                 h = &tgt->qphints[0];
4282         }
4283 out:
4284         cmd->qpair = h->qpair;
4285         cmd->se_cmd.cpuid = h->cpuid;
4286 }
4287
4288 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4289                                        struct fc_port *sess,
4290                                        struct atio_from_isp *atio)
4291 {
4292         struct se_session *se_sess = sess->se_sess;
4293         struct qla_tgt_cmd *cmd;
4294         int tag, cpu;
4295
4296         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
4297         if (tag < 0)
4298                 return NULL;
4299
4300         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4301         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4302         cmd->cmd_type = TYPE_TGT_CMD;
4303         memcpy(&cmd->atio, atio, sizeof(*atio));
4304         cmd->state = QLA_TGT_STATE_NEW;
4305         cmd->tgt = vha->vha_tgt.qla_tgt;
4306         qlt_incr_num_pend_cmds(vha);
4307         cmd->vha = vha;
4308         cmd->se_cmd.map_tag = tag;
4309         cmd->se_cmd.map_cpu = cpu;
4310         cmd->sess = sess;
4311         cmd->loop_id = sess->loop_id;
4312         cmd->conf_compl_supported = sess->conf_compl_supported;
4313
4314         cmd->trc_flags = 0;
4315         cmd->jiffies_at_alloc = get_jiffies_64();
4316
4317         cmd->unpacked_lun = scsilun_to_int(
4318             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4319         qlt_assign_qpair(vha, cmd);
4320         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4321         cmd->vp_idx = vha->vp_idx;
4322
4323         return cmd;
4324 }
4325
4326 /* ha->hardware_lock supposed to be held on entry */
4327 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4328         struct atio_from_isp *atio)
4329 {
4330         struct qla_hw_data *ha = vha->hw;
4331         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4332         struct fc_port *sess;
4333         struct qla_tgt_cmd *cmd;
4334         unsigned long flags;
4335         port_id_t id;
4336
4337         if (unlikely(tgt->tgt_stop)) {
4338                 ql_dbg(ql_dbg_io, vha, 0x3061,
4339                     "New command while device %p is shutting down\n", tgt);
4340                 return -ENODEV;
4341         }
4342
4343         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
4344         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
4345         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
4346         if (IS_SW_RESV_ADDR(id))
4347                 return -EBUSY;
4348
4349         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4350         if (unlikely(!sess))
4351                 return -EFAULT;
4352
4353         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4354          * session deletion, but it's still in sess_del_work wq */
4355         if (sess->deleted) {
4356                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4357                     "New command while old session %p is being deleted\n",
4358                     sess);
4359                 return -EFAULT;
4360         }
4361
4362         /*
4363          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4364          */
4365         if (!kref_get_unless_zero(&sess->sess_kref)) {
4366                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4367                     "%s: kref_get fail, %8phC oxid %x \n",
4368                     __func__, sess->port_name,
4369                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4370                 return -EFAULT;
4371         }
4372
4373         cmd = qlt_get_tag(vha, sess, atio);
4374         if (!cmd) {
4375                 ql_dbg(ql_dbg_io, vha, 0x3062,
4376                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4377                 ha->tgt.tgt_ops->put_sess(sess);
4378                 return -EBUSY;
4379         }
4380
4381         cmd->cmd_in_wq = 1;
4382         cmd->trc_flags |= TRC_NEW_CMD;
4383
4384         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4385         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4386         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4387
4388         INIT_WORK(&cmd->work, qlt_do_work);
4389         if (vha->flags.qpairs_available) {
4390                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4391         } else if (ha->msix_count) {
4392                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4393                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4394                             &cmd->work);
4395                 else
4396                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4397                             &cmd->work);
4398         } else {
4399                 queue_work(qla_tgt_wq, &cmd->work);
4400         }
4401
4402         return 0;
4403 }
4404
4405 /* ha->hardware_lock supposed to be held on entry */
4406 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4407         int fn, void *iocb, int flags)
4408 {
4409         struct scsi_qla_host *vha = sess->vha;
4410         struct qla_hw_data *ha = vha->hw;
4411         struct qla_tgt_mgmt_cmd *mcmd;
4412         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4413         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4414
4415         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4416         if (!mcmd) {
4417                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4418                     "qla_target(%d): Allocation of management "
4419                     "command failed, some commands and their data could "
4420                     "leak\n", vha->vp_idx);
4421                 return -ENOMEM;
4422         }
4423         memset(mcmd, 0, sizeof(*mcmd));
4424         mcmd->sess = sess;
4425
4426         if (iocb) {
4427                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4428                     sizeof(mcmd->orig_iocb.imm_ntfy));
4429         }
4430         mcmd->tmr_func = fn;
4431         mcmd->flags = flags;
4432         mcmd->reset_count = ha->base_qpair->chip_reset;
4433         mcmd->qpair = h->qpair;
4434         mcmd->vha = vha;
4435         mcmd->se_cmd.cpuid = h->cpuid;
4436         mcmd->unpacked_lun = lun;
4437
4438         switch (fn) {
4439         case QLA_TGT_LUN_RESET:
4440         case QLA_TGT_CLEAR_TS:
4441         case QLA_TGT_ABORT_TS:
4442                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4443                 /* drop through */
4444         case QLA_TGT_CLEAR_ACA:
4445                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4446                 mcmd->qpair = h->qpair;
4447                 mcmd->se_cmd.cpuid = h->cpuid;
4448                 break;
4449
4450         case QLA_TGT_TARGET_RESET:
4451         case QLA_TGT_NEXUS_LOSS_SESS:
4452         case QLA_TGT_NEXUS_LOSS:
4453         case QLA_TGT_ABORT_ALL:
4454         default:
4455                 /* no-op */
4456                 break;
4457         }
4458
4459         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4460         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4461             &mcmd->work);
4462
4463         return 0;
4464 }
4465
4466 /* ha->hardware_lock supposed to be held on entry */
4467 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4468 {
4469         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4470         struct qla_hw_data *ha = vha->hw;
4471         struct fc_port *sess;
4472         u64 unpacked_lun;
4473         int fn;
4474         unsigned long flags;
4475
4476         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4477
4478         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4479         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4480             a->u.isp24.fcp_hdr.s_id);
4481         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4482
4483         unpacked_lun =
4484             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4485
4486         if (sess == NULL || sess->deleted)
4487                 return -EFAULT;
4488
4489         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4490 }
4491
4492 /* ha->hardware_lock supposed to be held on entry */
4493 static int __qlt_abort_task(struct scsi_qla_host *vha,
4494         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4495 {
4496         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4497         struct qla_hw_data *ha = vha->hw;
4498         struct qla_tgt_mgmt_cmd *mcmd;
4499         u64 unpacked_lun;
4500         int rc;
4501
4502         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4503         if (mcmd == NULL) {
4504                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4505                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4506                     vha->vp_idx, __func__);
4507                 return -ENOMEM;
4508         }
4509         memset(mcmd, 0, sizeof(*mcmd));
4510
4511         mcmd->sess = sess;
4512         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4513             sizeof(mcmd->orig_iocb.imm_ntfy));
4514
4515         unpacked_lun =
4516             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4517         mcmd->reset_count = ha->base_qpair->chip_reset;
4518         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4519         mcmd->qpair = ha->base_qpair;
4520
4521         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4522             le16_to_cpu(iocb->u.isp2x.seq_id));
4523         if (rc != 0) {
4524                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4525                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4526                     vha->vp_idx, rc);
4527                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4528                 return -EFAULT;
4529         }
4530
4531         return 0;
4532 }
4533
4534 /* ha->hardware_lock supposed to be held on entry */
4535 static int qlt_abort_task(struct scsi_qla_host *vha,
4536         struct imm_ntfy_from_isp *iocb)
4537 {
4538         struct qla_hw_data *ha = vha->hw;
4539         struct fc_port *sess;
4540         int loop_id;
4541         unsigned long flags;
4542
4543         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4544
4545         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4546         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4547         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4548
4549         if (sess == NULL) {
4550                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4551                     "qla_target(%d): task abort for unexisting "
4552                     "session\n", vha->vp_idx);
4553                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4554                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4555         }
4556
4557         return __qlt_abort_task(vha, iocb, sess);
4558 }
4559
4560 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4561 {
4562         if (rc != MBS_COMMAND_COMPLETE) {
4563                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4564                         "%s: se_sess %p / sess %p from"
4565                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4566                         " LOGO failed: %#x\n",
4567                         __func__,
4568                         fcport->se_sess,
4569                         fcport,
4570                         fcport->port_name, fcport->loop_id,
4571                         fcport->d_id.b.domain, fcport->d_id.b.area,
4572                         fcport->d_id.b.al_pa, rc);
4573         }
4574
4575         fcport->logout_completed = 1;
4576 }
4577
4578 /*
4579 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4580 *
4581 * Schedules sessions with matching port_id/loop_id but different wwn for
4582 * deletion. Returns existing session with matching wwn if present.
4583 * Null otherwise.
4584 */
4585 struct fc_port *
4586 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4587     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4588 {
4589         struct fc_port *sess = NULL, *other_sess;
4590         uint64_t other_wwn;
4591
4592         *conflict_sess = NULL;
4593
4594         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4595
4596                 other_wwn = wwn_to_u64(other_sess->port_name);
4597
4598                 if (wwn == other_wwn) {
4599                         WARN_ON(sess);
4600                         sess = other_sess;
4601                         continue;
4602                 }
4603
4604                 /* find other sess with nport_id collision */
4605                 if (port_id.b24 == other_sess->d_id.b24) {
4606                         if (loop_id != other_sess->loop_id) {
4607                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000c,
4608                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4609                                     other_sess, other_sess->loop_id, other_wwn);
4610
4611                                 /*
4612                                  * logout_on_delete is set by default, but another
4613                                  * session that has the same s_id/loop_id combo
4614                                  * might have cleared it when requested this session
4615                                  * deletion, so don't touch it
4616                                  */
4617                                 qlt_schedule_sess_for_deletion(other_sess);
4618                         } else {
4619                                 /*
4620                                  * Another wwn used to have our s_id/loop_id
4621                                  * kill the session, but don't free the loop_id
4622                                  */
4623                                 ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01b,
4624                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4625                                     other_sess, other_sess->loop_id, other_wwn);
4626
4627                                 other_sess->keep_nport_handle = 1;
4628                                 if (other_sess->disc_state != DSC_DELETED)
4629                                         *conflict_sess = other_sess;
4630                                 qlt_schedule_sess_for_deletion(other_sess);
4631                         }
4632                         continue;
4633                 }
4634
4635                 /* find other sess with nport handle collision */
4636                 if ((loop_id == other_sess->loop_id) &&
4637                         (loop_id != FC_NO_LOOP_ID)) {
4638                         ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000d,
4639                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4640                                other_sess, other_sess->loop_id, other_wwn);
4641
4642                         /* Same loop_id but different s_id
4643                          * Ok to kill and logout */
4644                         qlt_schedule_sess_for_deletion(other_sess);
4645                 }
4646         }
4647
4648         return sess;
4649 }
4650
4651 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4652 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4653 {
4654         struct qla_tgt_sess_op *op;
4655         struct qla_tgt_cmd *cmd;
4656         uint32_t key;
4657         int count = 0;
4658         unsigned long flags;
4659
4660         key = (((u32)s_id->b.domain << 16) |
4661                ((u32)s_id->b.area   <<  8) |
4662                ((u32)s_id->b.al_pa));
4663
4664         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4665         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4666                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4667
4668                 if (op_key == key) {
4669                         op->aborted = true;
4670                         count++;
4671                 }
4672         }
4673
4674         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4675                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4676                 if (op_key == key) {
4677                         op->aborted = true;
4678                         count++;
4679                 }
4680         }
4681
4682         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4683                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4684                 if (cmd_key == key) {
4685                         cmd->aborted = 1;
4686                         count++;
4687                 }
4688         }
4689         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4690
4691         return count;
4692 }
4693
4694 static int qlt_handle_login(struct scsi_qla_host *vha,
4695     struct imm_ntfy_from_isp *iocb)
4696 {
4697         struct fc_port *sess = NULL, *conflict_sess = NULL;
4698         uint64_t wwn;
4699         port_id_t port_id;
4700         uint16_t loop_id, wd3_lo;
4701         int res = 0;
4702         struct qlt_plogi_ack_t *pla;
4703         unsigned long flags;
4704
4705         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4706
4707         port_id.b.domain = iocb->u.isp24.port_id[2];
4708         port_id.b.area   = iocb->u.isp24.port_id[1];
4709         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4710         port_id.b.rsvd_1 = 0;
4711
4712         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4713
4714         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4715         abort_cmds_for_s_id(vha, &port_id);
4716
4717         if (wwn) {
4718                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4719                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4720                     port_id, loop_id, &conflict_sess);
4721                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4722         } else {
4723                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4724                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4725                     __func__, __LINE__, loop_id, port_id.b24);
4726                 qlt_send_term_imm_notif(vha, iocb, 1);
4727                 goto out;
4728         }
4729
4730         if (IS_SW_RESV_ADDR(port_id)) {
4731                 res = 1;
4732                 goto out;
4733         }
4734
4735         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4736         if (!pla) {
4737                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4738                     "%s %d %8phC Term INOT due to mem alloc fail",
4739                     __func__, __LINE__,
4740                     iocb->u.isp24.port_name);
4741                 qlt_send_term_imm_notif(vha, iocb, 1);
4742                 goto out;
4743         }
4744
4745         if (conflict_sess) {
4746                 conflict_sess->login_gen++;
4747                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4748                     QLT_PLOGI_LINK_CONFLICT);
4749         }
4750
4751         if (!sess) {
4752                 pla->ref_count++;
4753                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4754                     "%s %d %8phC post new sess\n",
4755                     __func__, __LINE__, iocb->u.isp24.port_name);
4756                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4757                         qla24xx_post_newsess_work(vha, &port_id,
4758                             iocb->u.isp24.port_name,
4759                             iocb->u.isp24.u.plogi.node_name,
4760                             pla, FC4_TYPE_UNKNOWN);
4761                 else
4762                         qla24xx_post_newsess_work(vha, &port_id,
4763                             iocb->u.isp24.port_name, NULL,
4764                             pla, FC4_TYPE_UNKNOWN);
4765
4766                 goto out;
4767         }
4768
4769         if (sess->disc_state == DSC_UPD_FCPORT) {
4770                 u16 sec;
4771
4772                 /*
4773                  * Remote port registration is still going on from
4774                  * previous login. Allow it to finish before we
4775                  * accept the new login.
4776                  */
4777                 sess->next_disc_state = DSC_DELETE_PEND;
4778                 sec = jiffies_to_msecs(jiffies -
4779                     sess->jiffies_at_registration) / 1000;
4780                 if (sess->sec_since_registration < sec && sec &&
4781                     !(sec % 5)) {
4782                         sess->sec_since_registration = sec;
4783                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4784                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4785                             __func__, sess->port_name, sec);
4786                 }
4787
4788                 if (!conflict_sess)
4789                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4790
4791                 qlt_send_term_imm_notif(vha, iocb, 1);
4792                 goto out;
4793         }
4794
4795         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4796         sess->d_id = port_id;
4797         sess->login_gen++;
4798
4799         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4800                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4801                 sess->local = 0;
4802                 sess->loop_id = loop_id;
4803                 sess->d_id = port_id;
4804                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4805                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4806
4807                 if (wd3_lo & BIT_7)
4808                         sess->conf_compl_supported = 1;
4809
4810                 if ((wd3_lo & BIT_4) == 0)
4811                         sess->port_type = FCT_INITIATOR;
4812                 else
4813                         sess->port_type = FCT_TARGET;
4814
4815         } else
4816                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4817
4818
4819         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4820             "%s %d %8phC  DS %d\n",
4821             __func__, __LINE__, sess->port_name, sess->disc_state);
4822
4823         switch (sess->disc_state) {
4824         case DSC_DELETED:
4825         case DSC_LOGIN_PEND:
4826                 qlt_plogi_ack_unref(vha, pla);
4827                 break;
4828
4829         default:
4830                 /*
4831                  * Under normal circumstances we want to release nport handle
4832                  * during LOGO process to avoid nport handle leaks inside FW.
4833                  * The exception is when LOGO is done while another PLOGI with
4834                  * the same nport handle is waiting as might be the case here.
4835                  * Note: there is always a possibily of a race where session
4836                  * deletion has already started for other reasons (e.g. ACL
4837                  * removal) and now PLOGI arrives:
4838                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4839                  *    FW must have assigned this PLOGI a new/same handle and we
4840                  *    can proceed ACK'ing it as usual when session deletion
4841                  *    completes.
4842                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4843                  *    bit reached it, the handle has now been released. We'll
4844                  *    get an error when we ACK this PLOGI. Nothing will be sent
4845                  *    back to initiator. Initiator should eventually retry
4846                  *    PLOGI and situation will correct itself.
4847                  */
4848                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4849                     (sess->d_id.b24 == port_id.b24));
4850
4851                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4852                     "%s %d %8phC post del sess\n",
4853                     __func__, __LINE__, sess->port_name);
4854
4855
4856                 qlt_schedule_sess_for_deletion(sess);
4857                 break;
4858         }
4859 out:
4860         return res;
4861 }
4862
4863 /*
4864  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4865  */
4866 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4867         struct imm_ntfy_from_isp *iocb)
4868 {
4869         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4870         struct qla_hw_data *ha = vha->hw;
4871         struct fc_port *sess = NULL, *conflict_sess = NULL;
4872         uint64_t wwn;
4873         port_id_t port_id;
4874         uint16_t loop_id;
4875         uint16_t wd3_lo;
4876         int res = 0;
4877         unsigned long flags;
4878
4879         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4880
4881         port_id.b.domain = iocb->u.isp24.port_id[2];
4882         port_id.b.area   = iocb->u.isp24.port_id[1];
4883         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4884         port_id.b.rsvd_1 = 0;
4885
4886         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4887
4888         ql_dbg(ql_dbg_disc, vha, 0xf026,
4889             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4890             vha->vp_idx, iocb->u.isp24.port_id[2],
4891                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4892                    iocb->u.isp24.status_subcode, loop_id,
4893                 iocb->u.isp24.port_name);
4894
4895         /* res = 1 means ack at the end of thread
4896          * res = 0 means ack async/later.
4897          */
4898         switch (iocb->u.isp24.status_subcode) {
4899         case ELS_PLOGI:
4900                 res = qlt_handle_login(vha, iocb);
4901                 break;
4902
4903         case ELS_PRLI:
4904                 if (N2N_TOPO(ha)) {
4905                         sess = qla2x00_find_fcport_by_wwpn(vha,
4906                             iocb->u.isp24.port_name, 1);
4907
4908                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
4909                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4910                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
4911                                     __func__, __LINE__,
4912                                     iocb->u.isp24.port_name);
4913                                 qlt_send_term_imm_notif(vha, iocb, 1);
4914                                 break;
4915                         }
4916
4917                         res = qlt_handle_login(vha, iocb);
4918                         break;
4919                 }
4920
4921                 if (IS_SW_RESV_ADDR(port_id)) {
4922                         res = 1;
4923                         break;
4924                 }
4925
4926                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4927
4928                 if (wwn) {
4929                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4930                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
4931                                 loop_id, &conflict_sess);
4932                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
4933                 }
4934
4935                 if (conflict_sess) {
4936                         switch (conflict_sess->disc_state) {
4937                         case DSC_DELETED:
4938                         case DSC_DELETE_PEND:
4939                                 break;
4940                         default:
4941                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
4942                                     "PRLI with conflicting sess %p port %8phC\n",
4943                                     conflict_sess, conflict_sess->port_name);
4944                                 conflict_sess->fw_login_state =
4945                                     DSC_LS_PORT_UNAVAIL;
4946                                 qlt_send_term_imm_notif(vha, iocb, 1);
4947                                 res = 0;
4948                                 break;
4949                         }
4950                 }
4951
4952                 if (sess != NULL) {
4953                         bool delete = false;
4954                         int sec;
4955                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
4956                         switch (sess->fw_login_state) {
4957                         case DSC_LS_PLOGI_PEND:
4958                         case DSC_LS_PLOGI_COMP:
4959                         case DSC_LS_PRLI_COMP:
4960                                 break;
4961                         default:
4962                                 delete = true;
4963                                 break;
4964                         }
4965
4966                         switch (sess->disc_state) {
4967                         case DSC_UPD_FCPORT:
4968                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4969                                     flags);
4970
4971                                 sec = jiffies_to_msecs(jiffies -
4972                                     sess->jiffies_at_registration)/1000;
4973                                 if (sess->sec_since_registration < sec && sec &&
4974                                     !(sec % 5)) {
4975                                         sess->sec_since_registration = sec;
4976                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
4977                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
4978                                             __func__, sess->port_name, sec);
4979                                 }
4980                                 qlt_send_term_imm_notif(vha, iocb, 1);
4981                                 return 0;
4982
4983                         case DSC_LOGIN_PEND:
4984                         case DSC_GPDB:
4985                         case DSC_LOGIN_COMPLETE:
4986                         case DSC_ADISC:
4987                                 delete = false;
4988                                 break;
4989                         default:
4990                                 break;
4991                         }
4992
4993                         if (delete) {
4994                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
4995                                     flags);
4996                                 /*
4997                                  * Impatient initiator sent PRLI before last
4998                                  * PLOGI could finish. Will force him to re-try,
4999                                  * while last one finishes.
5000                                  */
5001                                 ql_log(ql_log_warn, sess->vha, 0xf095,
5002                                     "sess %p PRLI received, before plogi ack.\n",
5003                                     sess);
5004                                 qlt_send_term_imm_notif(vha, iocb, 1);
5005                                 res = 0;
5006                                 break;
5007                         }
5008
5009                         /*
5010                          * This shouldn't happen under normal circumstances,
5011                          * since we have deleted the old session during PLOGI
5012                          */
5013                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5014                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5015                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5016
5017                         sess->local = 0;
5018                         sess->loop_id = loop_id;
5019                         sess->d_id = port_id;
5020                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5021
5022                         if (wd3_lo & BIT_7)
5023                                 sess->conf_compl_supported = 1;
5024
5025                         if ((wd3_lo & BIT_4) == 0)
5026                                 sess->port_type = FCT_INITIATOR;
5027                         else
5028                                 sess->port_type = FCT_TARGET;
5029
5030                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5031                 }
5032                 res = 1; /* send notify ack */
5033
5034                 /* Make session global (not used in fabric mode) */
5035                 if (ha->current_topology != ISP_CFG_F) {
5036                         if (sess) {
5037                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5038                                     "%s %d %8phC post nack\n",
5039                                     __func__, __LINE__, sess->port_name);
5040                                 qla24xx_post_nack_work(vha, sess, iocb,
5041                                         SRB_NACK_PRLI);
5042                                 res = 0;
5043                         } else {
5044                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5045                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5046                                 qla2xxx_wake_dpc(vha);
5047                         }
5048                 } else {
5049                         if (sess) {
5050                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5051                                     "%s %d %8phC post nack\n",
5052                                     __func__, __LINE__, sess->port_name);
5053                                 qla24xx_post_nack_work(vha, sess, iocb,
5054                                         SRB_NACK_PRLI);
5055                                 res = 0;
5056                         }
5057                 }
5058                 break;
5059
5060         case ELS_TPRLO:
5061                 if (le16_to_cpu(iocb->u.isp24.flags) &
5062                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5063                         loop_id = 0xFFFF;
5064                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5065                         res = 1;
5066                         break;
5067                 }
5068                 /* fall through */
5069         case ELS_LOGO:
5070         case ELS_PRLO:
5071                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5072                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5073                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5074
5075                 if (sess) {
5076                         sess->login_gen++;
5077                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5078                         sess->logo_ack_needed = 1;
5079                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5080                 }
5081
5082                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5083
5084                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5085                     "%s: logo %llx res %d sess %p ",
5086                     __func__, wwn, res, sess);
5087                 if (res == 0) {
5088                         /*
5089                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5090                          * for LOGO_ACK & sess delete
5091                          */
5092                         BUG_ON(!sess);
5093                         res = 0;
5094                 } else {
5095                         /* cmd did not go to upper layer. */
5096                         if (sess) {
5097                                 qlt_schedule_sess_for_deletion(sess);
5098                                 res = 0;
5099                         }
5100                         /* else logo will be ack */
5101                 }
5102                 break;
5103         case ELS_PDISC:
5104         case ELS_ADISC:
5105         {
5106                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5107                 if (tgt->link_reinit_iocb_pending) {
5108                         qlt_send_notify_ack(ha->base_qpair,
5109                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5110                         tgt->link_reinit_iocb_pending = 0;
5111                 }
5112
5113                 sess = qla2x00_find_fcport_by_wwpn(vha,
5114                     iocb->u.isp24.port_name, 1);
5115                 if (sess) {
5116                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5117                                 "sess %p lid %d|%d DS %d LS %d\n",
5118                                 sess, sess->loop_id, loop_id,
5119                                 sess->disc_state, sess->fw_login_state);
5120                 }
5121
5122                 res = 1; /* send notify ack */
5123                 break;
5124         }
5125
5126         case ELS_FLOGI: /* should never happen */
5127         default:
5128                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5129                     "qla_target(%d): Unsupported ELS command %x "
5130                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5131                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5132                 break;
5133         }
5134
5135         ql_dbg(ql_dbg_disc, vha, 0xf026,
5136             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5137             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5138
5139         return res;
5140 }
5141
5142 /*
5143  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5144  */
5145 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5146         struct imm_ntfy_from_isp *iocb)
5147 {
5148         struct qla_hw_data *ha = vha->hw;
5149         uint32_t add_flags = 0;
5150         int send_notify_ack = 1;
5151         uint16_t status;
5152
5153         status = le16_to_cpu(iocb->u.isp2x.status);
5154         switch (status) {
5155         case IMM_NTFY_LIP_RESET:
5156         {
5157                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5158                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5159                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5160                     iocb->u.isp24.status_subcode);
5161
5162                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5163                         send_notify_ack = 0;
5164                 break;
5165         }
5166
5167         case IMM_NTFY_LIP_LINK_REINIT:
5168         {
5169                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5170                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5171                     "qla_target(%d): LINK REINIT (loop %#x, "
5172                     "subcode %x)\n", vha->vp_idx,
5173                     le16_to_cpu(iocb->u.isp24.nport_handle),
5174                     iocb->u.isp24.status_subcode);
5175                 if (tgt->link_reinit_iocb_pending) {
5176                         qlt_send_notify_ack(ha->base_qpair,
5177                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5178                 }
5179                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5180                 tgt->link_reinit_iocb_pending = 1;
5181                 /*
5182                  * QLogic requires to wait after LINK REINIT for possible
5183                  * PDISC or ADISC ELS commands
5184                  */
5185                 send_notify_ack = 0;
5186                 break;
5187         }
5188
5189         case IMM_NTFY_PORT_LOGOUT:
5190                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5191                     "qla_target(%d): Port logout (loop "
5192                     "%#x, subcode %x)\n", vha->vp_idx,
5193                     le16_to_cpu(iocb->u.isp24.nport_handle),
5194                     iocb->u.isp24.status_subcode);
5195
5196                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5197                         send_notify_ack = 0;
5198                 /* The sessions will be cleared in the callback, if needed */
5199                 break;
5200
5201         case IMM_NTFY_GLBL_TPRLO:
5202                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5203                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5204                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5205                         send_notify_ack = 0;
5206                 /* The sessions will be cleared in the callback, if needed */
5207                 break;
5208
5209         case IMM_NTFY_PORT_CONFIG:
5210                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5211                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5212                     status);
5213                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5214                         send_notify_ack = 0;
5215                 /* The sessions will be cleared in the callback, if needed */
5216                 break;
5217
5218         case IMM_NTFY_GLBL_LOGO:
5219                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5220                     "qla_target(%d): Link failure detected\n",
5221                     vha->vp_idx);
5222                 /* I_T nexus loss */
5223                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5224                         send_notify_ack = 0;
5225                 break;
5226
5227         case IMM_NTFY_IOCB_OVERFLOW:
5228                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5229                     "qla_target(%d): Cannot provide requested "
5230                     "capability (IOCB overflowed the immediate notify "
5231                     "resource count)\n", vha->vp_idx);
5232                 break;
5233
5234         case IMM_NTFY_ABORT_TASK:
5235                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5236                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5237                     "L %#x)\n", vha->vp_idx,
5238                     le16_to_cpu(iocb->u.isp2x.seq_id),
5239                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5240                     le16_to_cpu(iocb->u.isp2x.lun));
5241                 if (qlt_abort_task(vha, iocb) == 0)
5242                         send_notify_ack = 0;
5243                 break;
5244
5245         case IMM_NTFY_RESOURCE:
5246                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5247                     "qla_target(%d): Out of resources, host %ld\n",
5248                     vha->vp_idx, vha->host_no);
5249                 break;
5250
5251         case IMM_NTFY_MSG_RX:
5252                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5253                     "qla_target(%d): Immediate notify task %x\n",
5254                     vha->vp_idx, iocb->u.isp2x.task_flags);
5255                 break;
5256
5257         case IMM_NTFY_ELS:
5258                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5259                         send_notify_ack = 0;
5260                 break;
5261         default:
5262                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5263                     "qla_target(%d): Received unknown immediate "
5264                     "notify status %x\n", vha->vp_idx, status);
5265                 break;
5266         }
5267
5268         if (send_notify_ack)
5269                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5270                     0, 0);
5271 }
5272
5273 /*
5274  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5275  * This function sends busy to ISP 2xxx or 24xx.
5276  */
5277 static int __qlt_send_busy(struct qla_qpair *qpair,
5278         struct atio_from_isp *atio, uint16_t status)
5279 {
5280         struct scsi_qla_host *vha = qpair->vha;
5281         struct ctio7_to_24xx *ctio24;
5282         struct qla_hw_data *ha = vha->hw;
5283         request_t *pkt;
5284         struct fc_port *sess = NULL;
5285         unsigned long flags;
5286         u16 temp;
5287         port_id_t id;
5288
5289         id.b.al_pa = atio->u.isp24.fcp_hdr.s_id[2];
5290         id.b.area = atio->u.isp24.fcp_hdr.s_id[1];
5291         id.b.domain = atio->u.isp24.fcp_hdr.s_id[0];
5292         id.b.rsvd_1 = 0;
5293
5294         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5295         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5296         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5297         if (!sess) {
5298                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5299                 return 0;
5300         }
5301         /* Sending marker isn't necessary, since we called from ISR */
5302
5303         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5304         if (!pkt) {
5305                 ql_dbg(ql_dbg_io, vha, 0x3063,
5306                     "qla_target(%d): %s failed: unable to allocate "
5307                     "request packet", vha->vp_idx, __func__);
5308                 return -ENOMEM;
5309         }
5310
5311         qpair->tgt_counters.num_q_full_sent++;
5312         pkt->entry_count = 1;
5313         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5314
5315         ctio24 = (struct ctio7_to_24xx *)pkt;
5316         ctio24->entry_type = CTIO_TYPE7;
5317         ctio24->nport_handle = sess->loop_id;
5318         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5319         ctio24->vp_index = vha->vp_idx;
5320         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
5321         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
5322         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
5323         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5324         temp = (atio->u.isp24.attr << 9) |
5325                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5326                 CTIO7_FLAGS_DONT_RET_CTIO;
5327         ctio24->u.status1.flags = cpu_to_le16(temp);
5328         /*
5329          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5330          * if the explicit conformation is used.
5331          */
5332         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
5333         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5334
5335         ctio24->u.status1.residual = get_datalen_for_atio(atio);
5336
5337         if (ctio24->u.status1.residual != 0)
5338                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
5339
5340         /* Memory Barrier */
5341         wmb();
5342         if (qpair->reqq_start_iocbs)
5343                 qpair->reqq_start_iocbs(qpair);
5344         else
5345                 qla2x00_start_iocbs(vha, qpair->req);
5346         return 0;
5347 }
5348
5349 /*
5350  * This routine is used to allocate a command for either a QFull condition
5351  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5352  * out previously.
5353  */
5354 static void
5355 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5356         struct atio_from_isp *atio, uint16_t status, int qfull)
5357 {
5358         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5359         struct qla_hw_data *ha = vha->hw;
5360         struct fc_port *sess;
5361         struct se_session *se_sess;
5362         struct qla_tgt_cmd *cmd;
5363         int tag, cpu;
5364         unsigned long flags;
5365
5366         if (unlikely(tgt->tgt_stop)) {
5367                 ql_dbg(ql_dbg_io, vha, 0x300a,
5368                         "New command while device %p is shutting down\n", tgt);
5369                 return;
5370         }
5371
5372         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5373                 vha->hw->tgt.num_qfull_cmds_dropped++;
5374                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5375                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5376                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5377                                 vha->hw->tgt.num_qfull_cmds_dropped;
5378
5379                 ql_dbg(ql_dbg_io, vha, 0x3068,
5380                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5381                         vha->vp_idx, __func__,
5382                         vha->hw->tgt.num_qfull_cmds_dropped);
5383
5384                 qlt_chk_exch_leak_thresh_hold(vha);
5385                 return;
5386         }
5387
5388         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5389                 (vha, atio->u.isp24.fcp_hdr.s_id);
5390         if (!sess)
5391                 return;
5392
5393         se_sess = sess->se_sess;
5394
5395         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
5396         if (tag < 0) {
5397                 ql_dbg(ql_dbg_io, vha, 0x3009,
5398                         "qla_target(%d): %s: Allocation of cmd failed\n",
5399                         vha->vp_idx, __func__);
5400
5401                 vha->hw->tgt.num_qfull_cmds_dropped++;
5402                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5403                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5404                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5405                                 vha->hw->tgt.num_qfull_cmds_dropped;
5406
5407                 qlt_chk_exch_leak_thresh_hold(vha);
5408                 return;
5409         }
5410
5411         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5412         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5413
5414         qlt_incr_num_pend_cmds(vha);
5415         INIT_LIST_HEAD(&cmd->cmd_list);
5416         memcpy(&cmd->atio, atio, sizeof(*atio));
5417
5418         cmd->tgt = vha->vha_tgt.qla_tgt;
5419         cmd->vha = vha;
5420         cmd->reset_count = ha->base_qpair->chip_reset;
5421         cmd->q_full = 1;
5422         cmd->qpair = ha->base_qpair;
5423         cmd->se_cmd.map_cpu = cpu;
5424
5425         if (qfull) {
5426                 cmd->q_full = 1;
5427                 /* NOTE: borrowing the state field to carry the status */
5428                 cmd->state = status;
5429         } else
5430                 cmd->term_exchg = 1;
5431
5432         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5433         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5434
5435         vha->hw->tgt.num_qfull_cmds_alloc++;
5436         if (vha->hw->tgt.num_qfull_cmds_alloc >
5437                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5438                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5439                         vha->hw->tgt.num_qfull_cmds_alloc;
5440         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5441 }
5442
5443 int
5444 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5445 {
5446         struct scsi_qla_host *vha = qpair->vha;
5447         struct qla_hw_data *ha = vha->hw;
5448         unsigned long flags;
5449         struct qla_tgt_cmd *cmd, *tcmd;
5450         struct list_head free_list, q_full_list;
5451         int rc = 0;
5452
5453         if (list_empty(&ha->tgt.q_full_list))
5454                 return 0;
5455
5456         INIT_LIST_HEAD(&free_list);
5457         INIT_LIST_HEAD(&q_full_list);
5458
5459         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5460         if (list_empty(&ha->tgt.q_full_list)) {
5461                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5462                 return 0;
5463         }
5464
5465         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5466         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5467
5468         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5469         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5470                 if (cmd->q_full)
5471                         /* cmd->state is a borrowed field to hold status */
5472                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5473                 else if (cmd->term_exchg)
5474                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5475
5476                 if (rc == -ENOMEM)
5477                         break;
5478
5479                 if (cmd->q_full)
5480                         ql_dbg(ql_dbg_io, vha, 0x3006,
5481                             "%s: busy sent for ox_id[%04x]\n", __func__,
5482                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5483                 else if (cmd->term_exchg)
5484                         ql_dbg(ql_dbg_io, vha, 0x3007,
5485                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5486                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5487                 else
5488                         ql_dbg(ql_dbg_io, vha, 0x3008,
5489                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5490                             cmd);
5491
5492                 list_del(&cmd->cmd_list);
5493                 list_add_tail(&cmd->cmd_list, &free_list);
5494
5495                 /* piggy back on hardware_lock for protection */
5496                 vha->hw->tgt.num_qfull_cmds_alloc--;
5497         }
5498         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5499
5500         cmd = NULL;
5501
5502         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5503                 list_del(&cmd->cmd_list);
5504                 /* This cmd was never sent to TCM.  There is no need
5505                  * to schedule free or call free_cmd
5506                  */
5507                 qlt_free_cmd(cmd);
5508         }
5509
5510         if (!list_empty(&q_full_list)) {
5511                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5512                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5513                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5514         }
5515
5516         return rc;
5517 }
5518
5519 static void
5520 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5521     uint16_t status)
5522 {
5523         int rc = 0;
5524         struct scsi_qla_host *vha = qpair->vha;
5525
5526         rc = __qlt_send_busy(qpair, atio, status);
5527         if (rc == -ENOMEM)
5528                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5529 }
5530
5531 static int
5532 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5533         struct atio_from_isp *atio, uint8_t ha_locked)
5534 {
5535         struct qla_hw_data *ha = vha->hw;
5536         unsigned long flags;
5537
5538         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5539                 return 0;
5540
5541         if (!ha_locked)
5542                 spin_lock_irqsave(&ha->hardware_lock, flags);
5543         qlt_send_busy(qpair, atio, qla_sam_status);
5544         if (!ha_locked)
5545                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5546
5547         return 1;
5548 }
5549
5550 /* ha->hardware_lock supposed to be held on entry */
5551 /* called via callback from qla2xxx */
5552 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5553         struct atio_from_isp *atio, uint8_t ha_locked)
5554 {
5555         struct qla_hw_data *ha = vha->hw;
5556         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5557         int rc;
5558         unsigned long flags = 0;
5559
5560         if (unlikely(tgt == NULL)) {
5561                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5562                     "ATIO pkt, but no tgt (ha %p)", ha);
5563                 return;
5564         }
5565         /*
5566          * In tgt_stop mode we also should allow all requests to pass.
5567          * Otherwise, some commands can stuck.
5568          */
5569
5570         tgt->atio_irq_cmd_count++;
5571
5572         switch (atio->u.raw.entry_type) {
5573         case ATIO_TYPE7:
5574                 if (unlikely(atio->u.isp24.exchange_addr ==
5575                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5576                         ql_dbg(ql_dbg_io, vha, 0x3065,
5577                             "qla_target(%d): ATIO_TYPE7 "
5578                             "received with UNKNOWN exchange address, "
5579                             "sending QUEUE_FULL\n", vha->vp_idx);
5580                         if (!ha_locked)
5581                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5582                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5583                         if (!ha_locked)
5584                                 spin_unlock_irqrestore(&ha->hardware_lock,
5585                                     flags);
5586                         break;
5587                 }
5588
5589                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5590                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5591                             atio, ha_locked);
5592                         if (rc != 0) {
5593                                 tgt->atio_irq_cmd_count--;
5594                                 return;
5595                         }
5596                         rc = qlt_handle_cmd_for_atio(vha, atio);
5597                 } else {
5598                         rc = qlt_handle_task_mgmt(vha, atio);
5599                 }
5600                 if (unlikely(rc != 0)) {
5601                         if (!ha_locked)
5602                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5603                         switch (rc) {
5604                         case -ENODEV:
5605                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5606                                     "qla_target: Unable to send command to target\n");
5607                                 break;
5608                         case -EBADF:
5609                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5610                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5611                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5612                                     atio, 1, 0);
5613                                 break;
5614                         case -EBUSY:
5615                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5616                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5617                                     vha->vp_idx);
5618                                 qlt_send_busy(ha->base_qpair, atio,
5619                                     tc_sam_status);
5620                                 break;
5621                         default:
5622                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5623                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5624                                     vha->vp_idx);
5625                                 qlt_send_busy(ha->base_qpair, atio,
5626                                     qla_sam_status);
5627                                 break;
5628                         }
5629                         if (!ha_locked)
5630                                 spin_unlock_irqrestore(&ha->hardware_lock,
5631                                     flags);
5632                 }
5633                 break;
5634
5635         case IMMED_NOTIFY_TYPE:
5636         {
5637                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5638                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5639                             "qla_target(%d): Received ATIO packet %x "
5640                             "with error status %x\n", vha->vp_idx,
5641                             atio->u.raw.entry_type,
5642                             atio->u.isp2x.entry_status);
5643                         break;
5644                 }
5645                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5646
5647                 if (!ha_locked)
5648                         spin_lock_irqsave(&ha->hardware_lock, flags);
5649                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5650                 if (!ha_locked)
5651                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5652                 break;
5653         }
5654
5655         default:
5656                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5657                     "qla_target(%d): Received unknown ATIO atio "
5658                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5659                 break;
5660         }
5661
5662         tgt->atio_irq_cmd_count--;
5663 }
5664
5665 /* ha->hardware_lock supposed to be held on entry */
5666 /* called via callback from qla2xxx */
5667 static void qlt_response_pkt(struct scsi_qla_host *vha,
5668         struct rsp_que *rsp, response_t *pkt)
5669 {
5670         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5671
5672         if (unlikely(tgt == NULL)) {
5673                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5674                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5675                     vha->vp_idx, pkt->entry_type, vha->hw);
5676                 return;
5677         }
5678
5679         /*
5680          * In tgt_stop mode we also should allow all requests to pass.
5681          * Otherwise, some commands can stuck.
5682          */
5683
5684         switch (pkt->entry_type) {
5685         case CTIO_CRC2:
5686         case CTIO_TYPE7:
5687         {
5688                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5689                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5690                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5691                     entry);
5692                 break;
5693         }
5694
5695         case ACCEPT_TGT_IO_TYPE:
5696         {
5697                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5698                 int rc;
5699                 if (atio->u.isp2x.status !=
5700                     cpu_to_le16(ATIO_CDB_VALID)) {
5701                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5702                             "qla_target(%d): ATIO with error "
5703                             "status %x received\n", vha->vp_idx,
5704                             le16_to_cpu(atio->u.isp2x.status));
5705                         break;
5706                 }
5707
5708                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5709                 if (rc != 0)
5710                         return;
5711
5712                 rc = qlt_handle_cmd_for_atio(vha, atio);
5713                 if (unlikely(rc != 0)) {
5714                         switch (rc) {
5715                         case -ENODEV:
5716                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5717                                     "qla_target: Unable to send command to target\n");
5718                                 break;
5719                         case -EBADF:
5720                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5721                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5722                                 qlt_send_term_exchange(rsp->qpair, NULL,
5723                                     atio, 1, 0);
5724                                 break;
5725                         case -EBUSY:
5726                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5727                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5728                                     vha->vp_idx);
5729                                 qlt_send_busy(rsp->qpair, atio,
5730                                     tc_sam_status);
5731                                 break;
5732                         default:
5733                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5734                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5735                                     vha->vp_idx);
5736                                 qlt_send_busy(rsp->qpair, atio,
5737                                     qla_sam_status);
5738                                 break;
5739                         }
5740                 }
5741         }
5742         break;
5743
5744         case CONTINUE_TGT_IO_TYPE:
5745         {
5746                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5747                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5748                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5749                     entry);
5750                 break;
5751         }
5752
5753         case CTIO_A64_TYPE:
5754         {
5755                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5756                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5757                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5758                     entry);
5759                 break;
5760         }
5761
5762         case IMMED_NOTIFY_TYPE:
5763                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5764                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5765                 break;
5766
5767         case NOTIFY_ACK_TYPE:
5768                 if (tgt->notify_ack_expected > 0) {
5769                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5770                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5771                             "NOTIFY_ACK seq %08x status %x\n",
5772                             le16_to_cpu(entry->u.isp2x.seq_id),
5773                             le16_to_cpu(entry->u.isp2x.status));
5774                         tgt->notify_ack_expected--;
5775                         if (entry->u.isp2x.status !=
5776                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5777                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5778                                     "qla_target(%d): NOTIFY_ACK "
5779                                     "failed %x\n", vha->vp_idx,
5780                                     le16_to_cpu(entry->u.isp2x.status));
5781                         }
5782                 } else {
5783                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5784                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5785                             vha->vp_idx);
5786                 }
5787                 break;
5788
5789         case ABTS_RECV_24XX:
5790                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5791                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5792                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5793                 break;
5794
5795         case ABTS_RESP_24XX:
5796                 if (tgt->abts_resp_expected > 0) {
5797                         struct abts_resp_from_24xx_fw *entry =
5798                                 (struct abts_resp_from_24xx_fw *)pkt;
5799                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5800                             "ABTS_RESP_24XX: compl_status %x\n",
5801                             entry->compl_status);
5802                         tgt->abts_resp_expected--;
5803                         if (le16_to_cpu(entry->compl_status) !=
5804                             ABTS_RESP_COMPL_SUCCESS) {
5805                                 if ((entry->error_subcode1 == 0x1E) &&
5806                                     (entry->error_subcode2 == 0)) {
5807                                         /*
5808                                          * We've got a race here: aborted
5809                                          * exchange not terminated, i.e.
5810                                          * response for the aborted command was
5811                                          * sent between the abort request was
5812                                          * received and processed.
5813                                          * Unfortunately, the firmware has a
5814                                          * silly requirement that all aborted
5815                                          * exchanges must be explicitely
5816                                          * terminated, otherwise it refuses to
5817                                          * send responses for the abort
5818                                          * requests. So, we have to
5819                                          * (re)terminate the exchange and retry
5820                                          * the abort response.
5821                                          */
5822                                         qlt_24xx_retry_term_exchange(vha,
5823                                             entry);
5824                                 } else
5825                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5826                                             "qla_target(%d): ABTS_RESP_24XX "
5827                                             "failed %x (subcode %x:%x)",
5828                                             vha->vp_idx, entry->compl_status,
5829                                             entry->error_subcode1,
5830                                             entry->error_subcode2);
5831                         }
5832                 } else {
5833                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5834                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5835                             "received\n", vha->vp_idx);
5836                 }
5837                 break;
5838
5839         default:
5840                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5841                     "qla_target(%d): Received unknown response pkt "
5842                     "type %x\n", vha->vp_idx, pkt->entry_type);
5843                 break;
5844         }
5845
5846 }
5847
5848 /*
5849  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5850  */
5851 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5852         uint16_t *mailbox)
5853 {
5854         struct qla_hw_data *ha = vha->hw;
5855         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5856         int login_code;
5857
5858         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
5859                 return;
5860
5861         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5862             IS_QLA2100(ha))
5863                 return;
5864         /*
5865          * In tgt_stop mode we also should allow all requests to pass.
5866          * Otherwise, some commands can stuck.
5867          */
5868
5869
5870         switch (code) {
5871         case MBA_RESET:                 /* Reset */
5872         case MBA_SYSTEM_ERR:            /* System Error */
5873         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5874         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5875                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5876                     "qla_target(%d): System error async event %#x "
5877                     "occurred", vha->vp_idx, code);
5878                 break;
5879         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5880                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5881                 break;
5882
5883         case MBA_LOOP_UP:
5884         {
5885                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5886                     "qla_target(%d): Async LOOP_UP occurred "
5887                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5888                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5889                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5890                 if (tgt->link_reinit_iocb_pending) {
5891                         qlt_send_notify_ack(ha->base_qpair,
5892                             (void *)&tgt->link_reinit_iocb,
5893                             0, 0, 0, 0, 0, 0);
5894                         tgt->link_reinit_iocb_pending = 0;
5895                 }
5896                 break;
5897         }
5898
5899         case MBA_LIP_OCCURRED:
5900         case MBA_LOOP_DOWN:
5901         case MBA_LIP_RESET:
5902         case MBA_RSCN_UPDATE:
5903                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5904                     "qla_target(%d): Async event %#x occurred "
5905                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5906                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5907                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5908                 break;
5909
5910         case MBA_REJECTED_FCP_CMD:
5911                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
5912                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
5913                     vha->vp_idx,
5914                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5915                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5916
5917                 if (le16_to_cpu(mailbox[3]) == 1) {
5918                         /* exchange starvation. */
5919                         vha->hw->exch_starvation++;
5920                         if (vha->hw->exch_starvation > 5) {
5921                                 ql_log(ql_log_warn, vha, 0xd03a,
5922                                     "Exchange starvation-. Resetting RISC\n");
5923
5924                                 vha->hw->exch_starvation = 0;
5925                                 if (IS_P3P_TYPE(vha->hw))
5926                                         set_bit(FCOE_CTX_RESET_NEEDED,
5927                                             &vha->dpc_flags);
5928                                 else
5929                                         set_bit(ISP_ABORT_NEEDED,
5930                                             &vha->dpc_flags);
5931                                 qla2xxx_wake_dpc(vha);
5932                         }
5933                 }
5934                 break;
5935
5936         case MBA_PORT_UPDATE:
5937                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5938                     "qla_target(%d): Port update async event %#x "
5939                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5940                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5941                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5942                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5943
5944                 login_code = le16_to_cpu(mailbox[2]);
5945                 if (login_code == 0x4) {
5946                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5947                             "Async MB 2: Got PLOGI Complete\n");
5948                         vha->hw->exch_starvation = 0;
5949                 } else if (login_code == 0x7)
5950                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5951                             "Async MB 2: Port Logged Out\n");
5952                 break;
5953         default:
5954                 break;
5955         }
5956
5957 }
5958
5959 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5960         uint16_t loop_id)
5961 {
5962         fc_port_t *fcport, *tfcp, *del;
5963         int rc;
5964         unsigned long flags;
5965         u8 newfcport = 0;
5966
5967         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
5968         if (!fcport) {
5969                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5970                     "qla_target(%d): Allocation of tmp FC port failed",
5971                     vha->vp_idx);
5972                 return NULL;
5973         }
5974
5975         fcport->loop_id = loop_id;
5976
5977         rc = qla24xx_gpdb_wait(vha, fcport, 0);
5978         if (rc != QLA_SUCCESS) {
5979                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5980                     "qla_target(%d): Failed to retrieve fcport "
5981                     "information -- get_port_database() returned %x "
5982                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5983                 kfree(fcport);
5984                 return NULL;
5985         }
5986
5987         del = NULL;
5988         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
5989         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
5990
5991         if (tfcp) {
5992                 tfcp->d_id = fcport->d_id;
5993                 tfcp->port_type = fcport->port_type;
5994                 tfcp->supported_classes = fcport->supported_classes;
5995                 tfcp->flags |= fcport->flags;
5996                 tfcp->scan_state = QLA_FCPORT_FOUND;
5997
5998                 del = fcport;
5999                 fcport = tfcp;
6000         } else {
6001                 if (vha->hw->current_topology == ISP_CFG_F)
6002                         fcport->flags |= FCF_FABRIC_DEVICE;
6003
6004                 list_add_tail(&fcport->list, &vha->vp_fcports);
6005                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6006                    vha->fcport_count++;
6007                 fcport->login_gen++;
6008                 fcport->disc_state = DSC_LOGIN_COMPLETE;
6009                 fcport->login_succ = 1;
6010                 newfcport = 1;
6011         }
6012
6013         fcport->deleted = 0;
6014         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6015
6016         switch (vha->host->active_mode) {
6017         case MODE_INITIATOR:
6018         case MODE_DUAL:
6019                 if (newfcport) {
6020                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6021                                 qla24xx_sched_upd_fcport(fcport);
6022                         } else {
6023                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6024                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6025                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6026                                 qla24xx_post_gpsc_work(vha, fcport);
6027                         }
6028                 }
6029                 break;
6030
6031         case MODE_TARGET:
6032         default:
6033                 break;
6034         }
6035         if (del)
6036                 qla2x00_free_fcport(del);
6037
6038         return fcport;
6039 }
6040
6041 /* Must be called under tgt_mutex */
6042 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6043         uint8_t *s_id)
6044 {
6045         struct fc_port *sess = NULL;
6046         fc_port_t *fcport = NULL;
6047         int rc, global_resets;
6048         uint16_t loop_id = 0;
6049
6050         if ((s_id[0] == 0xFF) && (s_id[1] == 0xFC)) {
6051                 /*
6052                  * This is Domain Controller, so it should be
6053                  * OK to drop SCSI commands from it.
6054                  */
6055                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6056                     "Unable to find initiator with S_ID %x:%x:%x",
6057                     s_id[0], s_id[1], s_id[2]);
6058                 return NULL;
6059         }
6060
6061         mutex_lock(&vha->vha_tgt.tgt_mutex);
6062
6063 retry:
6064         global_resets =
6065             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6066
6067         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6068         if (rc != 0) {
6069                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6070
6071                 ql_log(ql_log_info, vha, 0xf071,
6072                     "qla_target(%d): Unable to find "
6073                     "initiator with S_ID %x:%x:%x",
6074                     vha->vp_idx, s_id[0], s_id[1],
6075                     s_id[2]);
6076
6077                 if (rc == -ENOENT) {
6078                         qlt_port_logo_t logo;
6079                         sid_to_portid(s_id, &logo.id);
6080                         logo.cmd_count = 1;
6081                         qlt_send_first_logo(vha, &logo);
6082                 }
6083
6084                 return NULL;
6085         }
6086
6087         fcport = qlt_get_port_database(vha, loop_id);
6088         if (!fcport) {
6089                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6090                 return NULL;
6091         }
6092
6093         if (global_resets !=
6094             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6095                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6096                     "qla_target(%d): global reset during session discovery "
6097                     "(counter was %d, new %d), retrying", vha->vp_idx,
6098                     global_resets,
6099                     atomic_read(&vha->vha_tgt.
6100                         qla_tgt->tgt_global_resets_count));
6101                 goto retry;
6102         }
6103
6104         sess = qlt_create_sess(vha, fcport, true);
6105
6106         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6107
6108         return sess;
6109 }
6110
6111 static void qlt_abort_work(struct qla_tgt *tgt,
6112         struct qla_tgt_sess_work_param *prm)
6113 {
6114         struct scsi_qla_host *vha = tgt->vha;
6115         struct qla_hw_data *ha = vha->hw;
6116         struct fc_port *sess = NULL;
6117         unsigned long flags = 0, flags2 = 0;
6118         uint8_t s_id[3];
6119         int rc;
6120
6121         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6122
6123         if (tgt->tgt_stop)
6124                 goto out_term2;
6125
6126         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
6127         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
6128         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
6129
6130         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6131         if (!sess) {
6132                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6133
6134                 sess = qlt_make_local_sess(vha, s_id);
6135                 /* sess has got an extra creation ref */
6136
6137                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6138                 if (!sess)
6139                         goto out_term2;
6140         } else {
6141                 if (sess->deleted) {
6142                         sess = NULL;
6143                         goto out_term2;
6144                 }
6145
6146                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6147                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6148                             "%s: kref_get fail %8phC \n",
6149                              __func__, sess->port_name);
6150                         sess = NULL;
6151                         goto out_term2;
6152                 }
6153         }
6154
6155         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6156         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6157
6158         ha->tgt.tgt_ops->put_sess(sess);
6159
6160         if (rc != 0)
6161                 goto out_term;
6162         return;
6163
6164 out_term2:
6165         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6166
6167         if (sess)
6168                 ha->tgt.tgt_ops->put_sess(sess);
6169
6170 out_term:
6171         spin_lock_irqsave(&ha->hardware_lock, flags);
6172         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6173             FCP_TMF_REJECTED, false);
6174         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6175 }
6176
6177 static void qlt_tmr_work(struct qla_tgt *tgt,
6178         struct qla_tgt_sess_work_param *prm)
6179 {
6180         struct atio_from_isp *a = &prm->tm_iocb2;
6181         struct scsi_qla_host *vha = tgt->vha;
6182         struct qla_hw_data *ha = vha->hw;
6183         struct fc_port *sess = NULL;
6184         unsigned long flags;
6185         uint8_t *s_id = NULL; /* to hide compiler warnings */
6186         int rc;
6187         u64 unpacked_lun;
6188         int fn;
6189         void *iocb;
6190
6191         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6192
6193         if (tgt->tgt_stop)
6194                 goto out_term2;
6195
6196         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6197         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6198         if (!sess) {
6199                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6200
6201                 sess = qlt_make_local_sess(vha, s_id);
6202                 /* sess has got an extra creation ref */
6203
6204                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6205                 if (!sess)
6206                         goto out_term2;
6207         } else {
6208                 if (sess->deleted) {
6209                         sess = NULL;
6210                         goto out_term2;
6211                 }
6212
6213                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6214                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6215                             "%s: kref_get fail %8phC\n",
6216                              __func__, sess->port_name);
6217                         sess = NULL;
6218                         goto out_term2;
6219                 }
6220         }
6221
6222         iocb = a;
6223         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6224         unpacked_lun =
6225             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6226
6227         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6228         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6229
6230         ha->tgt.tgt_ops->put_sess(sess);
6231
6232         if (rc != 0)
6233                 goto out_term;
6234         return;
6235
6236 out_term2:
6237         if (sess)
6238                 ha->tgt.tgt_ops->put_sess(sess);
6239         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6240 out_term:
6241         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6242 }
6243
6244 static void qlt_sess_work_fn(struct work_struct *work)
6245 {
6246         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6247         struct scsi_qla_host *vha = tgt->vha;
6248         unsigned long flags;
6249
6250         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6251
6252         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6253         while (!list_empty(&tgt->sess_works_list)) {
6254                 struct qla_tgt_sess_work_param *prm = list_entry(
6255                     tgt->sess_works_list.next, typeof(*prm),
6256                     sess_works_list_entry);
6257
6258                 /*
6259                  * This work can be scheduled on several CPUs at time, so we
6260                  * must delete the entry to eliminate double processing
6261                  */
6262                 list_del(&prm->sess_works_list_entry);
6263
6264                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6265
6266                 switch (prm->type) {
6267                 case QLA_TGT_SESS_WORK_ABORT:
6268                         qlt_abort_work(tgt, prm);
6269                         break;
6270                 case QLA_TGT_SESS_WORK_TM:
6271                         qlt_tmr_work(tgt, prm);
6272                         break;
6273                 default:
6274                         BUG_ON(1);
6275                         break;
6276                 }
6277
6278                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6279
6280                 kfree(prm);
6281         }
6282         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6283 }
6284
6285 /* Must be called under tgt_host_action_mutex */
6286 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6287 {
6288         struct qla_tgt *tgt;
6289         int rc, i;
6290         struct qla_qpair_hint *h;
6291
6292         if (!QLA_TGT_MODE_ENABLED())
6293                 return 0;
6294
6295         if (!IS_TGT_MODE_CAPABLE(ha)) {
6296                 ql_log(ql_log_warn, base_vha, 0xe070,
6297                     "This adapter does not support target mode.\n");
6298                 return 0;
6299         }
6300
6301         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6302             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6303
6304         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6305
6306         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6307         if (!tgt) {
6308                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6309                     "Unable to allocate struct qla_tgt\n");
6310                 return -ENOMEM;
6311         }
6312
6313         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6314                                sizeof(struct qla_qpair_hint),
6315                                GFP_KERNEL);
6316         if (!tgt->qphints) {
6317                 kfree(tgt);
6318                 ql_log(ql_log_warn, base_vha, 0x0197,
6319                     "Unable to allocate qpair hints.\n");
6320                 return -ENOMEM;
6321         }
6322
6323         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6324                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6325
6326         rc = btree_init64(&tgt->lun_qpair_map);
6327         if (rc) {
6328                 kfree(tgt->qphints);
6329                 kfree(tgt);
6330                 ql_log(ql_log_info, base_vha, 0x0198,
6331                         "Unable to initialize lun_qpair_map btree\n");
6332                 return -EIO;
6333         }
6334         h = &tgt->qphints[0];
6335         h->qpair = ha->base_qpair;
6336         INIT_LIST_HEAD(&h->hint_elem);
6337         h->cpuid = ha->base_qpair->cpuid;
6338         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6339
6340         for (i = 0; i < ha->max_qpairs; i++) {
6341                 unsigned long flags;
6342
6343                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6344                 h = &tgt->qphints[i + 1];
6345                 INIT_LIST_HEAD(&h->hint_elem);
6346                 if (qpair) {
6347                         h->qpair = qpair;
6348                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6349                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6350                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6351                         h->cpuid = qpair->cpuid;
6352                 }
6353         }
6354
6355         tgt->ha = ha;
6356         tgt->vha = base_vha;
6357         init_waitqueue_head(&tgt->waitQ);
6358         INIT_LIST_HEAD(&tgt->del_sess_list);
6359         spin_lock_init(&tgt->sess_work_lock);
6360         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6361         INIT_LIST_HEAD(&tgt->sess_works_list);
6362         atomic_set(&tgt->tgt_global_resets_count, 0);
6363
6364         base_vha->vha_tgt.qla_tgt = tgt;
6365
6366         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6367                 "qla_target(%d): using 64 Bit PCI addressing",
6368                 base_vha->vp_idx);
6369         /* 3 is reserved */
6370         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6371
6372         mutex_lock(&qla_tgt_mutex);
6373         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6374         mutex_unlock(&qla_tgt_mutex);
6375
6376         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6377                 ha->tgt.tgt_ops->add_target(base_vha);
6378
6379         return 0;
6380 }
6381
6382 /* Must be called under tgt_host_action_mutex */
6383 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6384 {
6385         if (!vha->vha_tgt.qla_tgt)
6386                 return 0;
6387
6388         if (vha->fc_vport) {
6389                 qlt_release(vha->vha_tgt.qla_tgt);
6390                 return 0;
6391         }
6392
6393         /* free left over qfull cmds */
6394         qlt_init_term_exchange(vha);
6395
6396         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6397             vha->host_no, ha);
6398         qlt_release(vha->vha_tgt.qla_tgt);
6399
6400         return 0;
6401 }
6402
6403 void qlt_remove_target_resources(struct qla_hw_data *ha)
6404 {
6405         struct scsi_qla_host *node;
6406         u32 key = 0;
6407
6408         btree_for_each_safe32(&ha->tgt.host_map, key, node)
6409                 btree_remove32(&ha->tgt.host_map, key);
6410
6411         btree_destroy32(&ha->tgt.host_map);
6412 }
6413
6414 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6415         unsigned char *b)
6416 {
6417         int i;
6418
6419         pr_debug("qla2xxx HW vha->node_name: ");
6420         for (i = 0; i < WWN_SIZE; i++)
6421                 pr_debug("%02x ", vha->node_name[i]);
6422         pr_debug("\n");
6423         pr_debug("qla2xxx HW vha->port_name: ");
6424         for (i = 0; i < WWN_SIZE; i++)
6425                 pr_debug("%02x ", vha->port_name[i]);
6426         pr_debug("\n");
6427
6428         pr_debug("qla2xxx passed configfs WWPN: ");
6429         put_unaligned_be64(wwpn, b);
6430         for (i = 0; i < WWN_SIZE; i++)
6431                 pr_debug("%02x ", b[i]);
6432         pr_debug("\n");
6433 }
6434
6435 /**
6436  * qla_tgt_lport_register - register lport with external module
6437  *
6438  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6439  * @phys_wwpn:
6440  * @npiv_wwpn:
6441  * @npiv_wwnn:
6442  * @callback:  lport initialization callback for tcm_qla2xxx code
6443  */
6444 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6445                        u64 npiv_wwpn, u64 npiv_wwnn,
6446                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6447 {
6448         struct qla_tgt *tgt;
6449         struct scsi_qla_host *vha;
6450         struct qla_hw_data *ha;
6451         struct Scsi_Host *host;
6452         unsigned long flags;
6453         int rc;
6454         u8 b[WWN_SIZE];
6455
6456         mutex_lock(&qla_tgt_mutex);
6457         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6458                 vha = tgt->vha;
6459                 ha = vha->hw;
6460
6461                 host = vha->host;
6462                 if (!host)
6463                         continue;
6464
6465                 if (!(host->hostt->supported_mode & MODE_TARGET))
6466                         continue;
6467
6468                 spin_lock_irqsave(&ha->hardware_lock, flags);
6469                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6470                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6471                             host->host_no);
6472                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6473                         continue;
6474                 }
6475                 if (tgt->tgt_stop) {
6476                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6477                                  host->host_no);
6478                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6479                         continue;
6480                 }
6481                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6482
6483                 if (!scsi_host_get(host)) {
6484                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6485                             "Unable to scsi_host_get() for"
6486                             " qla2xxx scsi_host\n");
6487                         continue;
6488                 }
6489                 qlt_lport_dump(vha, phys_wwpn, b);
6490
6491                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6492                         scsi_host_put(host);
6493                         continue;
6494                 }
6495                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6496                 if (rc != 0)
6497                         scsi_host_put(host);
6498
6499                 mutex_unlock(&qla_tgt_mutex);
6500                 return rc;
6501         }
6502         mutex_unlock(&qla_tgt_mutex);
6503
6504         return -ENODEV;
6505 }
6506 EXPORT_SYMBOL(qlt_lport_register);
6507
6508 /**
6509  * qla_tgt_lport_deregister - Degister lport
6510  *
6511  * @vha:  Registered scsi_qla_host pointer
6512  */
6513 void qlt_lport_deregister(struct scsi_qla_host *vha)
6514 {
6515         struct qla_hw_data *ha = vha->hw;
6516         struct Scsi_Host *sh = vha->host;
6517         /*
6518          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6519          */
6520         vha->vha_tgt.target_lport_ptr = NULL;
6521         ha->tgt.tgt_ops = NULL;
6522         /*
6523          * Release the Scsi_Host reference for the underlying qla2xxx host
6524          */
6525         scsi_host_put(sh);
6526 }
6527 EXPORT_SYMBOL(qlt_lport_deregister);
6528
6529 /* Must be called under HW lock */
6530 static void qlt_set_mode(struct scsi_qla_host *vha)
6531 {
6532         switch (ql2x_ini_mode) {
6533         case QLA2XXX_INI_MODE_DISABLED:
6534         case QLA2XXX_INI_MODE_EXCLUSIVE:
6535                 vha->host->active_mode = MODE_TARGET;
6536                 break;
6537         case QLA2XXX_INI_MODE_ENABLED:
6538                 vha->host->active_mode = MODE_UNKNOWN;
6539                 break;
6540         case QLA2XXX_INI_MODE_DUAL:
6541                 vha->host->active_mode = MODE_DUAL;
6542                 break;
6543         default:
6544                 break;
6545         }
6546 }
6547
6548 /* Must be called under HW lock */
6549 static void qlt_clear_mode(struct scsi_qla_host *vha)
6550 {
6551         switch (ql2x_ini_mode) {
6552         case QLA2XXX_INI_MODE_DISABLED:
6553                 vha->host->active_mode = MODE_UNKNOWN;
6554                 break;
6555         case QLA2XXX_INI_MODE_EXCLUSIVE:
6556                 vha->host->active_mode = MODE_INITIATOR;
6557                 break;
6558         case QLA2XXX_INI_MODE_ENABLED:
6559         case QLA2XXX_INI_MODE_DUAL:
6560                 vha->host->active_mode = MODE_INITIATOR;
6561                 break;
6562         default:
6563                 break;
6564         }
6565 }
6566
6567 /*
6568  * qla_tgt_enable_vha - NO LOCK HELD
6569  *
6570  * host_reset, bring up w/ Target Mode Enabled
6571  */
6572 void
6573 qlt_enable_vha(struct scsi_qla_host *vha)
6574 {
6575         struct qla_hw_data *ha = vha->hw;
6576         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6577         unsigned long flags;
6578         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6579
6580         if (!tgt) {
6581                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6582                     "Unable to locate qla_tgt pointer from"
6583                     " struct qla_hw_data\n");
6584                 dump_stack();
6585                 return;
6586         }
6587
6588         spin_lock_irqsave(&ha->hardware_lock, flags);
6589         tgt->tgt_stopped = 0;
6590         qlt_set_mode(vha);
6591         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6592
6593         if (vha->vp_idx) {
6594                 qla24xx_disable_vp(vha);
6595                 qla24xx_enable_vp(vha);
6596         } else {
6597                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6598                 qla2xxx_wake_dpc(base_vha);
6599                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6600                              QLA_SUCCESS);
6601         }
6602 }
6603 EXPORT_SYMBOL(qlt_enable_vha);
6604
6605 /*
6606  * qla_tgt_disable_vha - NO LOCK HELD
6607  *
6608  * Disable Target Mode and reset the adapter
6609  */
6610 static void qlt_disable_vha(struct scsi_qla_host *vha)
6611 {
6612         struct qla_hw_data *ha = vha->hw;
6613         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6614         unsigned long flags;
6615
6616         if (!tgt) {
6617                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6618                     "Unable to locate qla_tgt pointer from"
6619                     " struct qla_hw_data\n");
6620                 dump_stack();
6621                 return;
6622         }
6623
6624         spin_lock_irqsave(&ha->hardware_lock, flags);
6625         qlt_clear_mode(vha);
6626         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6627
6628         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6629         qla2xxx_wake_dpc(vha);
6630         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6631                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6632                        "qla2x00_wait_for_hba_online() failed\n");
6633 }
6634
6635 /*
6636  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6637  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6638  * members.
6639  */
6640 void
6641 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6642 {
6643         vha->vha_tgt.qla_tgt = NULL;
6644
6645         mutex_init(&vha->vha_tgt.tgt_mutex);
6646         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6647
6648         qlt_clear_mode(vha);
6649
6650         /*
6651          * NOTE: Currently the value is kept the same for <24xx and
6652          * >=24xx ISPs. If it is necessary to change it,
6653          * the check should be added for specific ISPs,
6654          * assigning the value appropriately.
6655          */
6656         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6657
6658         qlt_add_target(ha, vha);
6659 }
6660
6661 u8
6662 qlt_rff_id(struct scsi_qla_host *vha)
6663 {
6664         u8 fc4_feature = 0;
6665         /*
6666          * FC-4 Feature bit 0 indicates target functionality to the name server.
6667          */
6668         if (qla_tgt_mode_enabled(vha)) {
6669                 fc4_feature = BIT_0;
6670         } else if (qla_ini_mode_enabled(vha)) {
6671                 fc4_feature = BIT_1;
6672         } else if (qla_dual_mode_enabled(vha))
6673                 fc4_feature = BIT_0 | BIT_1;
6674
6675         return fc4_feature;
6676 }
6677
6678 /*
6679  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6680  * @ha: HA context
6681  *
6682  * Beginning of ATIO ring has initialization control block already built
6683  * by nvram config routine.
6684  *
6685  * Returns 0 on success.
6686  */
6687 void
6688 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6689 {
6690         struct qla_hw_data *ha = vha->hw;
6691         uint16_t cnt;
6692         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6693
6694         if (qla_ini_mode_enabled(vha))
6695                 return;
6696
6697         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6698                 pkt->u.raw.signature = ATIO_PROCESSED;
6699                 pkt++;
6700         }
6701
6702 }
6703
6704 /*
6705  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6706  * @ha: SCSI driver HA context
6707  */
6708 void
6709 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6710 {
6711         struct qla_hw_data *ha = vha->hw;
6712         struct atio_from_isp *pkt;
6713         int cnt, i;
6714
6715         if (!ha->flags.fw_started)
6716                 return;
6717
6718         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6719             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6720                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6721                 cnt = pkt->u.raw.entry_count;
6722
6723                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6724                         /*
6725                          * This packet is corrupted. The header + payload
6726                          * can not be trusted. There is no point in passing
6727                          * it further up.
6728                          */
6729                         ql_log(ql_log_warn, vha, 0xd03c,
6730                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6731                             pkt->u.isp24.fcp_hdr.s_id,
6732                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6733                             le32_to_cpu(pkt->u.isp24.exchange_addr), pkt);
6734
6735                         adjust_corrupted_atio(pkt);
6736                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6737                             ha_locked, 0);
6738                 } else {
6739                         qlt_24xx_atio_pkt_all_vps(vha,
6740                             (struct atio_from_isp *)pkt, ha_locked);
6741                 }
6742
6743                 for (i = 0; i < cnt; i++) {
6744                         ha->tgt.atio_ring_index++;
6745                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6746                                 ha->tgt.atio_ring_index = 0;
6747                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6748                         } else
6749                                 ha->tgt.atio_ring_ptr++;
6750
6751                         pkt->u.raw.signature = ATIO_PROCESSED;
6752                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6753                 }
6754                 wmb();
6755         }
6756
6757         /* Adjust ring index */
6758         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6759 }
6760
6761 void
6762 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6763 {
6764         struct qla_hw_data *ha = vha->hw;
6765         struct qla_msix_entry *msix = &ha->msix_entries[2];
6766         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6767
6768         if (!QLA_TGT_MODE_ENABLED())
6769                 return;
6770
6771         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6772         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6773         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6774
6775         if (ha->flags.msix_enabled) {
6776                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6777                         if (IS_QLA2071(ha)) {
6778                                 /* 4 ports Baker: Enable Interrupt Handshake */
6779                                 icb->msix_atio = 0;
6780                                 icb->firmware_options_2 |= BIT_26;
6781                         } else {
6782                                 icb->msix_atio = cpu_to_le16(msix->entry);
6783                                 icb->firmware_options_2 &= ~BIT_26;
6784                         }
6785                         ql_dbg(ql_dbg_init, vha, 0xf072,
6786                             "Registering ICB vector 0x%x for atio que.\n",
6787                             msix->entry);
6788                 }
6789         } else {
6790                 /* INTx|MSI */
6791                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6792                         icb->msix_atio = 0;
6793                         icb->firmware_options_2 |= BIT_26;
6794                         ql_dbg(ql_dbg_init, vha, 0xf072,
6795                             "%s: Use INTx for ATIOQ.\n", __func__);
6796                 }
6797         }
6798 }
6799
6800 void
6801 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6802 {
6803         struct qla_hw_data *ha = vha->hw;
6804         u32 tmp;
6805
6806         if (!QLA_TGT_MODE_ENABLED())
6807                 return;
6808
6809         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6810                 if (!ha->tgt.saved_set) {
6811                         /* We save only once */
6812                         ha->tgt.saved_exchange_count = nv->exchange_count;
6813                         ha->tgt.saved_firmware_options_1 =
6814                             nv->firmware_options_1;
6815                         ha->tgt.saved_firmware_options_2 =
6816                             nv->firmware_options_2;
6817                         ha->tgt.saved_firmware_options_3 =
6818                             nv->firmware_options_3;
6819                         ha->tgt.saved_set = 1;
6820                 }
6821
6822                 if (qla_tgt_mode_enabled(vha))
6823                         nv->exchange_count = cpu_to_le16(0xFFFF);
6824                 else                    /* dual */
6825                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6826
6827                 /* Enable target mode */
6828                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6829
6830                 /* Disable ini mode, if requested */
6831                 if (qla_tgt_mode_enabled(vha))
6832                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6833
6834                 /* Disable Full Login after LIP */
6835                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6836                 /* Enable initial LIP */
6837                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6838                 if (ql2xtgt_tape_enable)
6839                         /* Enable FC Tape support */
6840                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6841                 else
6842                         /* Disable FC Tape support */
6843                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6844
6845                 /* Disable Full Login after LIP */
6846                 nv->host_p &= cpu_to_le32(~BIT_10);
6847
6848                 /*
6849                  * clear BIT 15 explicitly as we have seen at least
6850                  * a couple of instances where this was set and this
6851                  * was causing the firmware to not be initialized.
6852                  */
6853                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6854                 /* Enable target PRLI control */
6855                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6856
6857                 if (IS_QLA25XX(ha)) {
6858                         /* Change Loop-prefer to Pt-Pt */
6859                         tmp = ~(BIT_4|BIT_5|BIT_6);
6860                         nv->firmware_options_2 &= cpu_to_le32(tmp);
6861                         tmp = P2P << 4;
6862                         nv->firmware_options_2 |= cpu_to_le32(tmp);
6863                 }
6864         } else {
6865                 if (ha->tgt.saved_set) {
6866                         nv->exchange_count = ha->tgt.saved_exchange_count;
6867                         nv->firmware_options_1 =
6868                             ha->tgt.saved_firmware_options_1;
6869                         nv->firmware_options_2 =
6870                             ha->tgt.saved_firmware_options_2;
6871                         nv->firmware_options_3 =
6872                             ha->tgt.saved_firmware_options_3;
6873                 }
6874                 return;
6875         }
6876
6877         if (ha->base_qpair->enable_class_2) {
6878                 if (vha->flags.init_done)
6879                         fc_host_supported_classes(vha->host) =
6880                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6881
6882                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6883         } else {
6884                 if (vha->flags.init_done)
6885                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6886
6887                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6888         }
6889 }
6890
6891 void
6892 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6893         struct init_cb_24xx *icb)
6894 {
6895         struct qla_hw_data *ha = vha->hw;
6896
6897         if (!QLA_TGT_MODE_ENABLED())
6898                 return;
6899
6900         if (ha->tgt.node_name_set) {
6901                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6902                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6903         }
6904
6905         /* disable ZIO at start time. */
6906         if (!vha->flags.init_done) {
6907                 uint32_t tmp;
6908                 tmp = le32_to_cpu(icb->firmware_options_2);
6909                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
6910                 icb->firmware_options_2 = cpu_to_le32(tmp);
6911         }
6912 }
6913
6914 void
6915 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6916 {
6917         struct qla_hw_data *ha = vha->hw;
6918         u32 tmp;
6919
6920         if (!QLA_TGT_MODE_ENABLED())
6921                 return;
6922
6923         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6924                 if (!ha->tgt.saved_set) {
6925                         /* We save only once */
6926                         ha->tgt.saved_exchange_count = nv->exchange_count;
6927                         ha->tgt.saved_firmware_options_1 =
6928                             nv->firmware_options_1;
6929                         ha->tgt.saved_firmware_options_2 =
6930                             nv->firmware_options_2;
6931                         ha->tgt.saved_firmware_options_3 =
6932                             nv->firmware_options_3;
6933                         ha->tgt.saved_set = 1;
6934                 }
6935
6936                 if (qla_tgt_mode_enabled(vha))
6937                         nv->exchange_count = cpu_to_le16(0xFFFF);
6938                 else                    /* dual */
6939                         nv->exchange_count = cpu_to_le16(ql2xexchoffld);
6940
6941                 /* Enable target mode */
6942                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6943
6944                 /* Disable ini mode, if requested */
6945                 if (qla_tgt_mode_enabled(vha))
6946                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6947                 /* Disable Full Login after LIP */
6948                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6949                 /* Enable initial LIP */
6950                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6951                 /*
6952                  * clear BIT 15 explicitly as we have seen at
6953                  * least a couple of instances where this was set
6954                  * and this was causing the firmware to not be
6955                  * initialized.
6956                  */
6957                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
6958                 if (ql2xtgt_tape_enable)
6959                         /* Enable FC tape support */
6960                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6961                 else
6962                         /* Disable FC tape support */
6963                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6964
6965                 /* Disable Full Login after LIP */
6966                 nv->host_p &= cpu_to_le32(~BIT_10);
6967                 /* Enable target PRLI control */
6968                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6969
6970                 /* Change Loop-prefer to Pt-Pt */
6971                 tmp = ~(BIT_4|BIT_5|BIT_6);
6972                 nv->firmware_options_2 &= cpu_to_le32(tmp);
6973                 tmp = P2P << 4;
6974                 nv->firmware_options_2 |= cpu_to_le32(tmp);
6975         } else {
6976                 if (ha->tgt.saved_set) {
6977                         nv->exchange_count = ha->tgt.saved_exchange_count;
6978                         nv->firmware_options_1 =
6979                             ha->tgt.saved_firmware_options_1;
6980                         nv->firmware_options_2 =
6981                             ha->tgt.saved_firmware_options_2;
6982                         nv->firmware_options_3 =
6983                             ha->tgt.saved_firmware_options_3;
6984                 }
6985                 return;
6986         }
6987
6988         if (ha->base_qpair->enable_class_2) {
6989                 if (vha->flags.init_done)
6990                         fc_host_supported_classes(vha->host) =
6991                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6992
6993                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6994         } else {
6995                 if (vha->flags.init_done)
6996                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6997
6998                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6999         }
7000 }
7001
7002 void
7003 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7004         struct init_cb_81xx *icb)
7005 {
7006         struct qla_hw_data *ha = vha->hw;
7007
7008         if (!QLA_TGT_MODE_ENABLED())
7009                 return;
7010
7011         if (ha->tgt.node_name_set) {
7012                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7013                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7014         }
7015
7016         /* disable ZIO at start time. */
7017         if (!vha->flags.init_done) {
7018                 uint32_t tmp;
7019                 tmp = le32_to_cpu(icb->firmware_options_2);
7020                 tmp &= ~(BIT_3 | BIT_2 | BIT_1 | BIT_0);
7021                 icb->firmware_options_2 = cpu_to_le32(tmp);
7022         }
7023
7024 }
7025
7026 void
7027 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7028 {
7029         if (!QLA_TGT_MODE_ENABLED())
7030                 return;
7031
7032         ha->msix_count += 1; /* For ATIO Q */
7033 }
7034
7035
7036 void
7037 qlt_modify_vp_config(struct scsi_qla_host *vha,
7038         struct vp_config_entry_24xx *vpmod)
7039 {
7040         /* enable target mode.  Bit5 = 1 => disable */
7041         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7042                 vpmod->options_idx1 &= ~BIT_5;
7043
7044         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7045         if (qla_tgt_mode_enabled(vha))
7046                 vpmod->options_idx1 &= ~BIT_4;
7047 }
7048
7049 void
7050 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7051 {
7052         int rc;
7053
7054         if (!QLA_TGT_MODE_ENABLED())
7055                 return;
7056
7057         if  ((ql2xenablemsix == 0) || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
7058                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7059                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7060         } else {
7061                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7062                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7063         }
7064
7065         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7066         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7067
7068         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7069         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7070             qlt_unknown_atio_work_fn);
7071
7072         qlt_clear_mode(base_vha);
7073
7074         rc = btree_init32(&ha->tgt.host_map);
7075         if (rc)
7076                 ql_log(ql_log_info, base_vha, 0xd03d,
7077                     "Unable to initialize ha->host_map btree\n");
7078
7079         qlt_update_vp_map(base_vha, SET_VP_IDX);
7080 }
7081
7082 irqreturn_t
7083 qla83xx_msix_atio_q(int irq, void *dev_id)
7084 {
7085         struct rsp_que *rsp;
7086         scsi_qla_host_t *vha;
7087         struct qla_hw_data *ha;
7088         unsigned long flags;
7089
7090         rsp = (struct rsp_que *) dev_id;
7091         ha = rsp->hw;
7092         vha = pci_get_drvdata(ha->pdev);
7093
7094         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7095
7096         qlt_24xx_process_atio_queue(vha, 0);
7097
7098         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7099
7100         return IRQ_HANDLED;
7101 }
7102
7103 static void
7104 qlt_handle_abts_recv_work(struct work_struct *work)
7105 {
7106         struct qla_tgt_sess_op *op = container_of(work,
7107                 struct qla_tgt_sess_op, work);
7108         scsi_qla_host_t *vha = op->vha;
7109         struct qla_hw_data *ha = vha->hw;
7110         unsigned long flags;
7111
7112         if (qla2x00_reset_active(vha) ||
7113             (op->chip_reset != ha->base_qpair->chip_reset))
7114                 return;
7115
7116         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7117         qlt_24xx_process_atio_queue(vha, 0);
7118         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7119
7120         spin_lock_irqsave(&ha->hardware_lock, flags);
7121         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7122         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7123
7124         kfree(op);
7125 }
7126
7127 void
7128 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7129     response_t *pkt)
7130 {
7131         struct qla_tgt_sess_op *op;
7132
7133         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7134
7135         if (!op) {
7136                 /* do not reach for ATIO queue here.  This is best effort err
7137                  * recovery at this point.
7138                  */
7139                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7140                 return;
7141         }
7142
7143         memcpy(&op->atio, pkt, sizeof(*pkt));
7144         op->vha = vha;
7145         op->chip_reset = vha->hw->base_qpair->chip_reset;
7146         op->rsp = rsp;
7147         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7148         queue_work(qla_tgt_wq, &op->work);
7149         return;
7150 }
7151
7152 int
7153 qlt_mem_alloc(struct qla_hw_data *ha)
7154 {
7155         if (!QLA_TGT_MODE_ENABLED())
7156                 return 0;
7157
7158         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7159                                      sizeof(struct qla_tgt_vp_map),
7160                                      GFP_KERNEL);
7161         if (!ha->tgt.tgt_vp_map)
7162                 return -ENOMEM;
7163
7164         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7165             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7166             &ha->tgt.atio_dma, GFP_KERNEL);
7167         if (!ha->tgt.atio_ring) {
7168                 kfree(ha->tgt.tgt_vp_map);
7169                 return -ENOMEM;
7170         }
7171         return 0;
7172 }
7173
7174 void
7175 qlt_mem_free(struct qla_hw_data *ha)
7176 {
7177         if (!QLA_TGT_MODE_ENABLED())
7178                 return;
7179
7180         if (ha->tgt.atio_ring) {
7181                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7182                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7183                     ha->tgt.atio_dma);
7184         }
7185         kfree(ha->tgt.tgt_vp_map);
7186 }
7187
7188 /* vport_slock to be held by the caller */
7189 void
7190 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7191 {
7192         void *slot;
7193         u32 key;
7194         int rc;
7195
7196         if (!QLA_TGT_MODE_ENABLED())
7197                 return;
7198
7199         key = vha->d_id.b24;
7200
7201         switch (cmd) {
7202         case SET_VP_IDX:
7203                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7204                 break;
7205         case SET_AL_PA:
7206                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7207                 if (!slot) {
7208                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7209                             "Save vha in host_map %p %06x\n", vha, key);
7210                         rc = btree_insert32(&vha->hw->tgt.host_map,
7211                                 key, vha, GFP_ATOMIC);
7212                         if (rc)
7213                                 ql_log(ql_log_info, vha, 0xd03e,
7214                                     "Unable to insert s_id into host_map: %06x\n",
7215                                     key);
7216                         return;
7217                 }
7218                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7219                     "replace existing vha in host_map %p %06x\n", vha, key);
7220                 btree_update32(&vha->hw->tgt.host_map, key, vha);
7221                 break;
7222         case RESET_VP_IDX:
7223                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7224                 break;
7225         case RESET_AL_PA:
7226                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7227                    "clear vha in host_map %p %06x\n", vha, key);
7228                 slot = btree_lookup32(&vha->hw->tgt.host_map, key);
7229                 if (slot)
7230                         btree_remove32(&vha->hw->tgt.host_map, key);
7231                 vha->d_id.b24 = 0;
7232                 break;
7233         }
7234 }
7235
7236 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7237 {
7238
7239         if (!vha->d_id.b24) {
7240                 vha->d_id = id;
7241                 qlt_update_vp_map(vha, SET_AL_PA);
7242         } else if (vha->d_id.b24 != id.b24) {
7243                 qlt_update_vp_map(vha, RESET_AL_PA);
7244                 vha->d_id = id;
7245                 qlt_update_vp_map(vha, SET_AL_PA);
7246         }
7247 }
7248
7249 static int __init qlt_parse_ini_mode(void)
7250 {
7251         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7252                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7253         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7254                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7255         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7256                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7257         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7258                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7259         else
7260                 return false;
7261
7262         return true;
7263 }
7264
7265 int __init qlt_init(void)
7266 {
7267         int ret;
7268
7269         if (!qlt_parse_ini_mode()) {
7270                 ql_log(ql_log_fatal, NULL, 0xe06b,
7271                     "qlt_parse_ini_mode() failed\n");
7272                 return -EINVAL;
7273         }
7274
7275         if (!QLA_TGT_MODE_ENABLED())
7276                 return 0;
7277
7278         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7279             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7280             qla_tgt_mgmt_cmd), 0, NULL);
7281         if (!qla_tgt_mgmt_cmd_cachep) {
7282                 ql_log(ql_log_fatal, NULL, 0xd04b,
7283                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7284                 return -ENOMEM;
7285         }
7286
7287         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7288             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7289             0, NULL);
7290
7291         if (!qla_tgt_plogi_cachep) {
7292                 ql_log(ql_log_fatal, NULL, 0xe06d,
7293                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7294                 ret = -ENOMEM;
7295                 goto out_mgmt_cmd_cachep;
7296         }
7297
7298         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7299             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7300         if (!qla_tgt_mgmt_cmd_mempool) {
7301                 ql_log(ql_log_fatal, NULL, 0xe06e,
7302                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7303                 ret = -ENOMEM;
7304                 goto out_plogi_cachep;
7305         }
7306
7307         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7308         if (!qla_tgt_wq) {
7309                 ql_log(ql_log_fatal, NULL, 0xe06f,
7310                     "alloc_workqueue for qla_tgt_wq failed\n");
7311                 ret = -ENOMEM;
7312                 goto out_cmd_mempool;
7313         }
7314         /*
7315          * Return 1 to signal that initiator-mode is being disabled
7316          */
7317         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7318
7319 out_cmd_mempool:
7320         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7321 out_plogi_cachep:
7322         kmem_cache_destroy(qla_tgt_plogi_cachep);
7323 out_mgmt_cmd_cachep:
7324         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7325         return ret;
7326 }
7327
7328 void qlt_exit(void)
7329 {
7330         if (!QLA_TGT_MODE_ENABLED())
7331                 return;
7332
7333         destroy_workqueue(qla_tgt_wq);
7334         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7335         kmem_cache_destroy(qla_tgt_plogi_cachep);
7336         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7337 }