drivers/scsi/qla2xxx/tcm_qla2xxx.c

   1 /*******************************************************************************
   2  * This file contains tcm implementation using v4 configfs fabric infrastructure
   3  * for QLogic target mode HBAs
   4  *
   5  * (c) Copyright 2010-2013 Datera, Inc.
   6  *
   7  * Author: Nicholas A. Bellinger <nab@daterainc.com>
   8  *
   9  * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
  10  * the TCM_FC / Open-FCoE.org fabric module.
  11  *
  12  * Copyright (c) 2010 Cisco Systems, Inc
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  ****************************************************************************/
  24
  25
  26 #include <linux/module.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/utsname.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/init.h>
  31 #include <linux/list.h>
  32 #include <linux/slab.h>
  33 #include <linux/kthread.h>
  34 #include <linux/types.h>
  35 #include <linux/string.h>
  36 #include <linux/configfs.h>
  37 #include <linux/ctype.h>
  38 #include <asm/unaligned.h>
  39 #include <scsi/scsi.h>
  40 #include <scsi/scsi_host.h>
  41 #include <scsi/scsi_device.h>
  42 #include <scsi/scsi_cmnd.h>
  43 #include <target/target_core_base.h>
  44 #include <target/target_core_fabric.h>
  45
  46 #include "qla_def.h"
  47 #include "qla_target.h"
  48 #include "tcm_qla2xxx.h"
  49
  50 static struct workqueue_struct *tcm_qla2xxx_free_wq;
  51
  52 /*
  53  * Parse WWN.
  54  * If strict, we require lower-case hex and colon separators to be sure
  55  * the name is the same as what would be generated by ft_format_wwn()
  56  * so the name and wwn are mapped one-to-one.
  57  */
  58 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
  59 {
  60         const char *cp;
  61         char c;
  62         u32 nibble;
  63         u32 byte = 0;
  64         u32 pos = 0;
  65         u32 err;
  66
  67         *wwn = 0;
  68         for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
  69                 c = *cp;
  70                 if (c == '\n' && cp[1] == '\0')
  71                         continue;
  72                 if (strict && pos++ == 2 && byte++ < 7) {
  73                         pos = 0;
  74                         if (c == ':')
  75                                 continue;
  76                         err = 1;
  77                         goto fail;
  78                 }
  79                 if (c == '\0') {
  80                         err = 2;
  81                         if (strict && byte != 8)
  82                                 goto fail;
  83                         return cp - name;
  84                 }
  85                 err = 3;
  86                 if (isdigit(c))
  87                         nibble = c - '0';
  88                 else if (isxdigit(c) && (islower(c) || !strict))
  89                         nibble = tolower(c) - 'a' + 10;
  90                 else
  91                         goto fail;
  92                 *wwn = (*wwn << 4) | nibble;
  93         }
  94         err = 4;
  95 fail:
  96         pr_debug("err %u len %zu pos %u byte %u\n",
  97                         err, cp - name, pos, byte);
  98         return -1;
  99 }
 100
 101 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
 102 {
 103         u8 b[8];
 104
 105         put_unaligned_be64(wwn, b);
 106         return snprintf(buf, len,
 107                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 108                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
 109 }
 110
 111 static char *tcm_qla2xxx_get_fabric_name(void)
 112 {
 113         return "qla2xxx";
 114 }
 115
 116 /*
 117  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
 118  */
 119 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
 120 {
 121         unsigned int i, j;
 122         u8 wwn[8];
 123
 124         memset(wwn, 0, sizeof(wwn));
 125
 126         /* Validate and store the new name */
 127         for (i = 0, j = 0; i < 16; i++) {
 128                 int value;
 129
 130                 value = hex_to_bin(*ns++);
 131                 if (value >= 0)
 132                         j = (j << 4) | value;
 133                 else
 134                         return -EINVAL;
 135
 136                 if (i % 2) {
 137                         wwn[i/2] = j & 0xff;
 138                         j = 0;
 139                 }
 140         }
 141
 142         *nm = wwn_to_u64(wwn);
 143         return 0;
 144 }
 145
 146 /*
 147  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 148  * store_fc_host_vport_create()
 149  */
 150 static int tcm_qla2xxx_npiv_parse_wwn(
 151         const char *name,
 152         size_t count,
 153         u64 *wwpn,
 154         u64 *wwnn)
 155 {
 156         unsigned int cnt = count;
 157         int rc;
 158
 159         *wwpn = 0;
 160         *wwnn = 0;
 161
 162         /* count may include a LF at end of string */
 163         if (name[cnt-1] == '\n' || name[cnt-1] == 0)
 164                 cnt--;
 165
 166         /* validate we have enough characters for WWPN */
 167         if ((cnt != (16+1+16)) || (name[16] != ':'))
 168                 return -EINVAL;
 169
 170         rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
 171         if (rc != 0)
 172                 return rc;
 173
 174         rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
 175         if (rc != 0)
 176                 return rc;
 177
 178         return 0;
 179 }
 180
 181 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
 182 {
 183         return "qla2xxx_npiv";
 184 }
 185
 186 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
 187 {
 188         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 189                                 struct tcm_qla2xxx_tpg, se_tpg);
 190         struct tcm_qla2xxx_lport *lport = tpg->lport;
 191
 192         return lport->lport_naa_name;
 193 }
 194
 195 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
 196 {
 197         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 198                                 struct tcm_qla2xxx_tpg, se_tpg);
 199         return tpg->lport_tpgt;
 200 }
 201
 202 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
 203 {
 204         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 205                                 struct tcm_qla2xxx_tpg, se_tpg);
 206
 207         return tpg->tpg_attrib.generate_node_acls;
 208 }
 209
 210 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
 211 {
 212         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 213                                 struct tcm_qla2xxx_tpg, se_tpg);
 214
 215         return tpg->tpg_attrib.cache_dynamic_acls;
 216 }
 217
 218 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
 219 {
 220         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 221                                 struct tcm_qla2xxx_tpg, se_tpg);
 222
 223         return tpg->tpg_attrib.demo_mode_write_protect;
 224 }
 225
 226 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
 227 {
 228         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 229                                 struct tcm_qla2xxx_tpg, se_tpg);
 230
 231         return tpg->tpg_attrib.prod_mode_write_protect;
 232 }
 233
 234 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
 235 {
 236         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 237                                 struct tcm_qla2xxx_tpg, se_tpg);
 238
 239         return tpg->tpg_attrib.demo_mode_login_only;
 240 }
 241
 242 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
 243 {
 244         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 245                                 struct tcm_qla2xxx_tpg, se_tpg);
 246
 247         return tpg->tpg_attrib.fabric_prot_type;
 248 }
 249
 250 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
 251 {
 252         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 253                                 struct tcm_qla2xxx_tpg, se_tpg);
 254
 255         return tpg->lport_tpgt;
 256 }
 257
 258 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
 259 {
 260         struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
 261                         struct qla_tgt_mgmt_cmd, free_work);
 262
 263         transport_generic_free_cmd(&mcmd->se_cmd, 0);
 264 }
 265
 266 /*
 267  * Called from qla_target_template->free_mcmd(), and will call
 268  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 269  * release callback.  qla_hw_data->hardware_lock is expected to be held
 270  */
 271 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
 272 {
 273         INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
 274         queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
 275 }
 276
 277 static void tcm_qla2xxx_complete_free(struct work_struct *work)
 278 {
 279         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 280
 281         cmd->cmd_in_wq = 0;
 282
 283         WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
 284
 285         cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
 286         cmd->trc_flags |= TRC_CMD_FREE;
 287         transport_generic_free_cmd(&cmd->se_cmd, 0);
 288 }
 289
 290 /*
 291  * Called from qla_target_template->free_cmd(), and will call
 292  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 293  * release callback.  qla_hw_data->hardware_lock is expected to be held
 294  */
 295 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 296 {
 297         cmd->qpair->tgt_counters.core_qla_free_cmd++;
 298         cmd->cmd_in_wq = 1;
 299
 300         WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
 301         cmd->trc_flags |= TRC_CMD_DONE;
 302
 303         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 304         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 305 }
 306
 307 /*
 308  * Called from struct target_core_fabric_ops->check_stop_free() context
 309  */
 310 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 311 {
 312         struct qla_tgt_cmd *cmd;
 313
 314         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 315                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 316                 cmd->trc_flags |= TRC_CMD_CHK_STOP;
 317         }
 318
 319         return target_put_sess_cmd(se_cmd);
 320 }
 321
 322 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 323  * fabric descriptor @se_cmd command to release
 324  */
 325 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 326 {
 327         struct qla_tgt_cmd *cmd;
 328
 329         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 330                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 331                                 struct qla_tgt_mgmt_cmd, se_cmd);
 332                 qlt_free_mcmd(mcmd);
 333                 return;
 334         }
 335
 336         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 337         qlt_free_cmd(cmd);
 338 }
 339
 340 static void tcm_qla2xxx_release_session(struct kref *kref)
 341 {
 342         struct fc_port  *sess = container_of(kref,
 343             struct fc_port, sess_kref);
 344
 345         qlt_unreg_sess(sess);
 346 }
 347
 348 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
 349 {
 350         if (!sess)
 351                 return;
 352
 353         kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
 354 }
 355
 356 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 357 {
 358         struct fc_port *sess = se_sess->fabric_sess_ptr;
 359         struct scsi_qla_host *vha;
 360         unsigned long flags;
 361
 362         BUG_ON(!sess);
 363         vha = sess->vha;
 364
 365         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 366         target_sess_cmd_list_set_waiting(se_sess);
 367         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 368
 369         tcm_qla2xxx_put_sess(sess);
 370 }
 371
 372 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 373 {
 374         return 0;
 375 }
 376
 377 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 378 {
 379         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 380                                 struct qla_tgt_cmd, se_cmd);
 381
 382         if (cmd->aborted) {
 383                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 384                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 385                  * already kick start the free.
 386                  */
 387                 pr_debug("write_pending aborted cmd[%p] refcount %d "
 388                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 389                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 390                         cmd->se_cmd.transport_state,
 391                         cmd->se_cmd.t_state,
 392                         cmd->se_cmd.se_cmd_flags);
 393                 transport_generic_request_failure(&cmd->se_cmd,
 394                         TCM_CHECK_CONDITION_ABORT_CMD);
 395                 return 0;
 396         }
 397         cmd->trc_flags |= TRC_XFR_RDY;
 398         cmd->bufflen = se_cmd->data_length;
 399         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 400
 401         cmd->sg_cnt = se_cmd->t_data_nents;
 402         cmd->sg = se_cmd->t_data_sg;
 403
 404         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 405         cmd->prot_sg = se_cmd->t_prot_sg;
 406         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 407         se_cmd->pi_err = 0;
 408
 409         /*
 410          * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
 411          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 412          */
 413         return qlt_rdy_to_xfer(cmd);
 414 }
 415
 416 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
 417 {
 418         unsigned long flags;
 419         /*
 420          * Check for WRITE_PENDING status to determine if we need to wait for
 421          * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
 422          */
 423         spin_lock_irqsave(&se_cmd->t_state_lock, flags);
 424         if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
 425             se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
 426                 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 427                 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
 428                                                 50);
 429                 return 0;
 430         }
 431         spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 432
 433         return 0;
 434 }
 435
 436 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 437 {
 438         return;
 439 }
 440
 441 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 442 {
 443         if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
 444                 struct qla_tgt_cmd *cmd = container_of(se_cmd,
 445                                 struct qla_tgt_cmd, se_cmd);
 446                 return cmd->state;
 447         }
 448
 449         return 0;
 450 }
 451
 452 /*
 453  * Called from process context in qla_target.c:qlt_do_work() code
 454  */
 455 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 456         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 457         int data_dir, int bidi)
 458 {
 459         struct se_cmd *se_cmd = &cmd->se_cmd;
 460         struct se_session *se_sess;
 461         struct fc_port *sess;
 462 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 463         struct se_portal_group *se_tpg;
 464         struct tcm_qla2xxx_tpg *tpg;
 465 #endif
 466         int flags = TARGET_SCF_ACK_KREF;
 467
 468         if (bidi)
 469                 flags |= TARGET_SCF_BIDI_OP;
 470
 471         if (se_cmd->cpuid != WORK_CPU_UNBOUND)
 472                 flags |= TARGET_SCF_USE_CPUID;
 473
 474         sess = cmd->sess;
 475         if (!sess) {
 476                 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
 477                 return -EINVAL;
 478         }
 479
 480         se_sess = sess->se_sess;
 481         if (!se_sess) {
 482                 pr_err("Unable to locate active struct se_session\n");
 483                 return -EINVAL;
 484         }
 485
 486 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 487         se_tpg = se_sess->se_tpg;
 488         tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
 489         if (unlikely(tpg->tpg_attrib.jam_host)) {
 490                 /* return, and dont run target_submit_cmd,discarding command */
 491                 return 0;
 492         }
 493 #endif
 494
 495         cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
 496         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 497                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 498                                 data_dir, flags);
 499 }
 500
 501 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 502 {
 503         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 504
 505         /*
 506          * Ensure that the complete FCP WRITE payload has been received.
 507          * Otherwise return an exception via CHECK_CONDITION status.
 508          */
 509         cmd->cmd_in_wq = 0;
 510
 511         cmd->qpair->tgt_counters.qla_core_ret_ctio++;
 512         if (!cmd->write_data_transferred) {
 513                 /*
 514                  * Check if se_cmd has already been aborted via LUN_RESET, and
 515                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 516                  */
 517                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 518                         complete(&cmd->se_cmd.t_transport_stop_comp);
 519                         return;
 520                 }
 521
 522                 switch (cmd->dif_err_code) {
 523                 case DIF_ERR_GRD:
 524                         cmd->se_cmd.pi_err =
 525                             TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
 526                         break;
 527                 case DIF_ERR_REF:
 528                         cmd->se_cmd.pi_err =
 529                             TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
 530                         break;
 531                 case DIF_ERR_APP:
 532                         cmd->se_cmd.pi_err =
 533                             TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
 534                         break;
 535                 case DIF_ERR_NONE:
 536                 default:
 537                         break;
 538                 }
 539
 540                 if (cmd->se_cmd.pi_err)
 541                         transport_generic_request_failure(&cmd->se_cmd,
 542                                 cmd->se_cmd.pi_err);
 543                 else
 544                         transport_generic_request_failure(&cmd->se_cmd,
 545                                 TCM_CHECK_CONDITION_ABORT_CMD);
 546
 547                 return;
 548         }
 549
 550         return target_execute_cmd(&cmd->se_cmd);
 551 }
 552
 553 /*
 554  * Called from qla_target.c:qlt_do_ctio_completion()
 555  */
 556 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 557 {
 558         cmd->trc_flags |= TRC_DATA_IN;
 559         cmd->cmd_in_wq = 1;
 560         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 561         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 562 }
 563
 564 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
 565 {
 566         return 0;
 567 }
 568
 569 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
 570     uint16_t *pfw_prot_opts)
 571 {
 572         struct se_cmd *se_cmd = &cmd->se_cmd;
 573
 574         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
 575                 *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 576
 577         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
 578                 *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
 579
 580         return 0;
 581 }
 582
 583 /*
 584  * Called from qla_target.c:qlt_issue_task_mgmt()
 585  */
 586 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
 587         uint16_t tmr_func, uint32_t tag)
 588 {
 589         struct fc_port *sess = mcmd->sess;
 590         struct se_cmd *se_cmd = &mcmd->se_cmd;
 591         int transl_tmr_func = 0;
 592         int flags = TARGET_SCF_ACK_KREF;
 593
 594         switch (tmr_func) {
 595         case QLA_TGT_ABTS:
 596                 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
 597                 transl_tmr_func = TMR_ABORT_TASK;
 598                 flags |= TARGET_SCF_LOOKUP_LUN_FROM_TAG;
 599                 break;
 600         case QLA_TGT_2G_ABORT_TASK:
 601                 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
 602                 transl_tmr_func = TMR_ABORT_TASK;
 603                 break;
 604         case QLA_TGT_CLEAR_ACA:
 605                 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
 606                 transl_tmr_func = TMR_CLEAR_ACA;
 607                 break;
 608         case QLA_TGT_TARGET_RESET:
 609                 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
 610                 transl_tmr_func = TMR_TARGET_WARM_RESET;
 611                 break;
 612         case QLA_TGT_LUN_RESET:
 613                 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
 614                 transl_tmr_func = TMR_LUN_RESET;
 615                 break;
 616         case QLA_TGT_CLEAR_TS:
 617                 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
 618                 transl_tmr_func = TMR_CLEAR_TASK_SET;
 619                 break;
 620         case QLA_TGT_ABORT_TS:
 621                 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
 622                 transl_tmr_func = TMR_ABORT_TASK_SET;
 623                 break;
 624         default:
 625                 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
 626                     sess->vha->host_no, tmr_func);
 627                 return -ENOSYS;
 628         }
 629
 630         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 631             transl_tmr_func, GFP_ATOMIC, tag, flags);
 632 }
 633
 634 static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
 635     uint64_t tag)
 636 {
 637         struct qla_tgt_cmd *cmd = NULL;
 638         struct se_cmd *secmd;
 639         unsigned long flags;
 640
 641         if (!sess->se_sess)
 642                 return NULL;
 643
 644         spin_lock_irqsave(&sess->se_sess->sess_cmd_lock, flags);
 645         list_for_each_entry(secmd, &sess->se_sess->sess_cmd_list, se_cmd_list) {
 646                 /* skip task management functions, including tmr->task_cmd */
 647                 if (secmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
 648                         continue;
 649
 650                 if (secmd->tag == tag) {
 651                         cmd = container_of(secmd, struct qla_tgt_cmd, se_cmd);
 652                         break;
 653                 }
 654         }
 655         spin_unlock_irqrestore(&sess->se_sess->sess_cmd_lock, flags);
 656
 657         return cmd;
 658 }
 659
 660 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 661 {
 662         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 663                                 struct qla_tgt_cmd, se_cmd);
 664
 665         if (cmd->aborted) {
 666                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 667                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 668                  * already kick start the free.
 669                  */
 670                 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
 671                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 672                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 673                         cmd->se_cmd.transport_state,
 674                         cmd->se_cmd.t_state,
 675                         cmd->se_cmd.se_cmd_flags);
 676                 return 0;
 677         }
 678
 679         cmd->trc_flags |= TRC_XMIT_DATA;
 680         cmd->bufflen = se_cmd->data_length;
 681         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 682
 683         cmd->sg_cnt = se_cmd->t_data_nents;
 684         cmd->sg = se_cmd->t_data_sg;
 685         cmd->offset = 0;
 686
 687         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 688         cmd->prot_sg = se_cmd->t_prot_sg;
 689         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 690         se_cmd->pi_err = 0;
 691
 692         /*
 693          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 694          */
 695         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 696                                 se_cmd->scsi_status);
 697 }
 698
 699 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 700 {
 701         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 702                                 struct qla_tgt_cmd, se_cmd);
 703         int xmit_type = QLA_TGT_XMIT_STATUS;
 704
 705         if (cmd->aborted) {
 706                 /*
 707                  * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
 708                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 709                  * already kick start the free.
 710                  */
 711                 pr_debug(
 712                     "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
 713                     cmd, kref_read(&cmd->se_cmd.cmd_kref),
 714                     cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
 715                     cmd->se_cmd.se_cmd_flags);
 716                 return 0;
 717         }
 718         cmd->bufflen = se_cmd->data_length;
 719         cmd->sg = NULL;
 720         cmd->sg_cnt = 0;
 721         cmd->offset = 0;
 722         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 723         cmd->trc_flags |= TRC_XMIT_STATUS;
 724
 725         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 726                 /*
 727                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 728                  * for qla_tgt_xmit_response LLD code
 729                  */
 730                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 731                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 732                         se_cmd->residual_count = 0;
 733                 }
 734                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 735                 se_cmd->residual_count += se_cmd->data_length;
 736
 737                 cmd->bufflen = 0;
 738         }
 739         /*
 740          * Now queue status response to qla2xxx LLD code and response ring
 741          */
 742         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 743 }
 744
 745 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 746 {
 747         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 748         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 749                                 struct qla_tgt_mgmt_cmd, se_cmd);
 750
 751         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 752                         mcmd, se_tmr->function, se_tmr->response);
 753         /*
 754          * Do translation between TCM TM response codes and
 755          * QLA2xxx FC TM response codes.
 756          */
 757         switch (se_tmr->response) {
 758         case TMR_FUNCTION_COMPLETE:
 759                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 760                 break;
 761         case TMR_TASK_DOES_NOT_EXIST:
 762                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 763                 break;
 764         case TMR_FUNCTION_REJECTED:
 765                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 766                 break;
 767         case TMR_LUN_DOES_NOT_EXIST:
 768         default:
 769                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 770                 break;
 771         }
 772         /*
 773          * Queue the TM response to QLA2xxx LLD to build a
 774          * CTIO response packet.
 775          */
 776         qlt_xmit_tm_rsp(mcmd);
 777 }
 778
 779 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 780 {
 781         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 782                                 struct qla_tgt_cmd, se_cmd);
 783
 784         if (qlt_abort_cmd(cmd))
 785                 return;
 786 }
 787
 788 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 789                         struct tcm_qla2xxx_nacl *, struct fc_port *);
 790 /*
 791  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 792  */
 793 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
 794 {
 795         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 796         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 797         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 798         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 799                                 struct tcm_qla2xxx_lport, lport_wwn);
 800         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 801                                 struct tcm_qla2xxx_nacl, se_node_acl);
 802         void *node;
 803
 804         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 805
 806         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 807         if (WARN_ON(node && (node != se_nacl))) {
 808                 /*
 809                  * The nacl no longer matches what we think it should be.
 810                  * Most likely a new dynamic acl has been added while
 811                  * someone dropped the hardware lock.  It clearly is a
 812                  * bug elsewhere, but this bit can't make things worse.
 813                  */
 814                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 815                                node, GFP_ATOMIC);
 816         }
 817
 818         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 819             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 820         /*
 821          * Now clear the se_nacl and session pointers from our HW lport lookup
 822          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 823          *
 824          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 825          * target_wait_for_sess_cmds() before the session waits for outstanding
 826          * I/O to complete, to avoid a race between session shutdown execution
 827          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 828          */
 829         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 830 }
 831
 832 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
 833 {
 834         target_sess_cmd_list_set_waiting(sess->se_sess);
 835 }
 836
 837 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 838                 const char *name)
 839 {
 840         struct tcm_qla2xxx_nacl *nacl =
 841                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 842         u64 wwnn;
 843
 844         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 845                 return -EINVAL;
 846
 847         nacl->nport_wwnn = wwnn;
 848         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 849
 850         return 0;
 851 }
 852
 853 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 854
 855 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 856                                                                         \
 857 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 858                 struct config_item *item, char *page)                   \
 859 {                                                                       \
 860         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 861         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 862                         struct tcm_qla2xxx_tpg, se_tpg);                \
 863                                                                         \
 864         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 865 }                                                                       \
 866                                                                         \
 867 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 868                 struct config_item *item, const char *page, size_t count) \
 869 {                                                                       \
 870         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 871         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 872                         struct tcm_qla2xxx_tpg, se_tpg);                \
 873         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 874         unsigned long val;                                              \
 875         int ret;                                                        \
 876                                                                         \
 877         ret = kstrtoul(page, 0, &val);                                  \
 878         if (ret < 0) {                                                  \
 879                 pr_err("kstrtoul() failed with"                         \
 880                                 " ret: %d\n", ret);                     \
 881                 return -EINVAL;                                         \
 882         }                                                               \
 883                                                                         \
 884         if ((val != 0) && (val != 1)) {                                 \
 885                 pr_err("Illegal boolean value %lu\n", val);             \
 886                 return -EINVAL;                                         \
 887         }                                                               \
 888                                                                         \
 889         a->name = val;                                                  \
 890                                                                         \
 891         return count;                                                   \
 892 }                                                                       \
 893 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 894
 895 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 896 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 897 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 898 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 899 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 900 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 901 DEF_QLA_TPG_ATTRIB(jam_host);
 902 #endif
 903
 904 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 905         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 906         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 907         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 908         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 909         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 910 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 911         &tcm_qla2xxx_tpg_attrib_attr_jam_host,
 912 #endif
 913         NULL,
 914 };
 915
 916 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 917
 918 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
 919                 char *page)
 920 {
 921         struct se_portal_group *se_tpg = to_tpg(item);
 922         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 923                         struct tcm_qla2xxx_tpg, se_tpg);
 924
 925         return snprintf(page, PAGE_SIZE, "%d\n",
 926                         atomic_read(&tpg->lport_tpg_enabled));
 927 }
 928
 929 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
 930                 const char *page, size_t count)
 931 {
 932         struct se_portal_group *se_tpg = to_tpg(item);
 933         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 934         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 935                         struct tcm_qla2xxx_lport, lport_wwn);
 936         struct scsi_qla_host *vha = lport->qla_vha;
 937         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 938                         struct tcm_qla2xxx_tpg, se_tpg);
 939         unsigned long op;
 940         int rc;
 941
 942         rc = kstrtoul(page, 0, &op);
 943         if (rc < 0) {
 944                 pr_err("kstrtoul() returned %d\n", rc);
 945                 return -EINVAL;
 946         }
 947         if ((op != 1) && (op != 0)) {
 948                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 949                 return -EINVAL;
 950         }
 951         if (op) {
 952                 if (atomic_read(&tpg->lport_tpg_enabled))
 953                         return -EEXIST;
 954
 955                 atomic_set(&tpg->lport_tpg_enabled, 1);
 956                 qlt_enable_vha(vha);
 957         } else {
 958                 if (!atomic_read(&tpg->lport_tpg_enabled))
 959                         return count;
 960
 961                 atomic_set(&tpg->lport_tpg_enabled, 0);
 962                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
 963                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
 964         }
 965
 966         return count;
 967 }
 968
 969 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
 970                 char *page)
 971 {
 972         return target_show_dynamic_sessions(to_tpg(item), page);
 973 }
 974
 975 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
 976                 const char *page, size_t count)
 977 {
 978         struct se_portal_group *se_tpg = to_tpg(item);
 979         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 980                                 struct tcm_qla2xxx_tpg, se_tpg);
 981         unsigned long val;
 982         int ret = kstrtoul(page, 0, &val);
 983
 984         if (ret) {
 985                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
 986                 return ret;
 987         }
 988         if (val != 0 && val != 1 && val != 3) {
 989                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
 990                 return -EINVAL;
 991         }
 992         tpg->tpg_attrib.fabric_prot_type = val;
 993
 994         return count;
 995 }
 996
 997 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
 998                 char *page)
 999 {
1000         struct se_portal_group *se_tpg = to_tpg(item);
1001         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1002                                 struct tcm_qla2xxx_tpg, se_tpg);
1003
1004         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
1005 }
1006
1007 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
1008 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
1009 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
1010
1011 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1012         &tcm_qla2xxx_tpg_attr_enable,
1013         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
1014         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
1015         NULL,
1016 };
1017
1018 static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn,
1019                                                     const char *name)
1020 {
1021         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1022                         struct tcm_qla2xxx_lport, lport_wwn);
1023         struct tcm_qla2xxx_tpg *tpg;
1024         unsigned long tpgt;
1025         int ret;
1026
1027         if (strstr(name, "tpgt_") != name)
1028                 return ERR_PTR(-EINVAL);
1029         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1030                 return ERR_PTR(-EINVAL);
1031
1032         if ((tpgt != 1)) {
1033                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1034                 return ERR_PTR(-ENOSYS);
1035         }
1036
1037         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1038         if (!tpg) {
1039                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1040                 return ERR_PTR(-ENOMEM);
1041         }
1042         tpg->lport = lport;
1043         tpg->lport_tpgt = tpgt;
1044         /*
1045          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1046          * NodeACLs
1047          */
1048         tpg->tpg_attrib.generate_node_acls = 1;
1049         tpg->tpg_attrib.demo_mode_write_protect = 1;
1050         tpg->tpg_attrib.cache_dynamic_acls = 1;
1051         tpg->tpg_attrib.demo_mode_login_only = 1;
1052         tpg->tpg_attrib.jam_host = 0;
1053
1054         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1055         if (ret < 0) {
1056                 kfree(tpg);
1057                 return NULL;
1058         }
1059
1060         lport->tpg_1 = tpg;
1061
1062         return &tpg->se_tpg;
1063 }
1064
1065 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1066 {
1067         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1068                         struct tcm_qla2xxx_tpg, se_tpg);
1069         struct tcm_qla2xxx_lport *lport = tpg->lport;
1070         struct scsi_qla_host *vha = lport->qla_vha;
1071         /*
1072          * Call into qla2x_target.c LLD logic to shutdown the active
1073          * FC Nexuses and disable target mode operation for this qla_hw_data
1074          */
1075         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1076                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1077
1078         core_tpg_deregister(se_tpg);
1079         /*
1080          * Clear local TPG=1 pointer for non NPIV mode.
1081          */
1082         lport->tpg_1 = NULL;
1083         kfree(tpg);
1084 }
1085
1086 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1087                 char *page)
1088 {
1089         return tcm_qla2xxx_tpg_enable_show(item, page);
1090 }
1091
1092 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1093                 const char *page, size_t count)
1094 {
1095         struct se_portal_group *se_tpg = to_tpg(item);
1096         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1097         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1098                         struct tcm_qla2xxx_lport, lport_wwn);
1099         struct scsi_qla_host *vha = lport->qla_vha;
1100         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1101                         struct tcm_qla2xxx_tpg, se_tpg);
1102         unsigned long op;
1103         int rc;
1104
1105         rc = kstrtoul(page, 0, &op);
1106         if (rc < 0) {
1107                 pr_err("kstrtoul() returned %d\n", rc);
1108                 return -EINVAL;
1109         }
1110         if ((op != 1) && (op != 0)) {
1111                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1112                 return -EINVAL;
1113         }
1114         if (op) {
1115                 if (atomic_read(&tpg->lport_tpg_enabled))
1116                         return -EEXIST;
1117
1118                 atomic_set(&tpg->lport_tpg_enabled, 1);
1119                 qlt_enable_vha(vha);
1120         } else {
1121                 if (!atomic_read(&tpg->lport_tpg_enabled))
1122                         return count;
1123
1124                 atomic_set(&tpg->lport_tpg_enabled, 0);
1125                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1126                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1127         }
1128
1129         return count;
1130 }
1131
1132 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1133
1134 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1135         &tcm_qla2xxx_npiv_tpg_attr_enable,
1136         NULL,
1137 };
1138
1139 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn,
1140                                                          const char *name)
1141 {
1142         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1143                         struct tcm_qla2xxx_lport, lport_wwn);
1144         struct tcm_qla2xxx_tpg *tpg;
1145         unsigned long tpgt;
1146         int ret;
1147
1148         if (strstr(name, "tpgt_") != name)
1149                 return ERR_PTR(-EINVAL);
1150         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1151                 return ERR_PTR(-EINVAL);
1152
1153         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1154         if (!tpg) {
1155                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1156                 return ERR_PTR(-ENOMEM);
1157         }
1158         tpg->lport = lport;
1159         tpg->lport_tpgt = tpgt;
1160
1161         /*
1162          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1163          * NodeACLs
1164          */
1165         tpg->tpg_attrib.generate_node_acls = 1;
1166         tpg->tpg_attrib.demo_mode_write_protect = 1;
1167         tpg->tpg_attrib.cache_dynamic_acls = 1;
1168         tpg->tpg_attrib.demo_mode_login_only = 1;
1169
1170         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1171         if (ret < 0) {
1172                 kfree(tpg);
1173                 return NULL;
1174         }
1175         lport->tpg_1 = tpg;
1176         return &tpg->se_tpg;
1177 }
1178
1179 /*
1180  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1181  */
1182 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(
1183         scsi_qla_host_t *vha,
1184         const uint8_t *s_id)
1185 {
1186         struct tcm_qla2xxx_lport *lport;
1187         struct se_node_acl *se_nacl;
1188         struct tcm_qla2xxx_nacl *nacl;
1189         u32 key;
1190
1191         lport = vha->vha_tgt.target_lport_ptr;
1192         if (!lport) {
1193                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1194                 dump_stack();
1195                 return NULL;
1196         }
1197
1198         key = sid_to_key(s_id);
1199         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1200
1201         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1202         if (!se_nacl) {
1203                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1204                 return NULL;
1205         }
1206         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1207             se_nacl, se_nacl->initiatorname);
1208
1209         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1210         if (!nacl->fc_port) {
1211                 pr_err("Unable to locate struct fc_port\n");
1212                 return NULL;
1213         }
1214
1215         return nacl->fc_port;
1216 }
1217
1218 /*
1219  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1220  */
1221 static void tcm_qla2xxx_set_sess_by_s_id(
1222         struct tcm_qla2xxx_lport *lport,
1223         struct se_node_acl *new_se_nacl,
1224         struct tcm_qla2xxx_nacl *nacl,
1225         struct se_session *se_sess,
1226         struct fc_port *fc_port,
1227         uint8_t *s_id)
1228 {
1229         u32 key;
1230         void *slot;
1231         int rc;
1232
1233         key = sid_to_key(s_id);
1234         pr_debug("set_sess_by_s_id: %06x\n", key);
1235
1236         slot = btree_lookup32(&lport->lport_fcport_map, key);
1237         if (!slot) {
1238                 if (new_se_nacl) {
1239                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1240                         nacl->nport_id = key;
1241                         rc = btree_insert32(&lport->lport_fcport_map, key,
1242                                         new_se_nacl, GFP_ATOMIC);
1243                         if (rc)
1244                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1245                                     (int)key);
1246                 } else {
1247                         pr_debug("Wiping nonexisting fc_port entry\n");
1248                 }
1249
1250                 fc_port->se_sess = se_sess;
1251                 nacl->fc_port = fc_port;
1252                 return;
1253         }
1254
1255         if (nacl->fc_port) {
1256                 if (new_se_nacl == NULL) {
1257                         pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1258                         btree_remove32(&lport->lport_fcport_map, key);
1259                         nacl->fc_port = NULL;
1260                         return;
1261                 }
1262                 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1263                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1264                 fc_port->se_sess = se_sess;
1265                 nacl->fc_port = fc_port;
1266                 return;
1267         }
1268
1269         if (new_se_nacl == NULL) {
1270                 pr_debug("Clearing existing fc_port entry\n");
1271                 btree_remove32(&lport->lport_fcport_map, key);
1272                 return;
1273         }
1274
1275         pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1276         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1277         fc_port->se_sess = se_sess;
1278         nacl->fc_port = fc_port;
1279
1280         pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1281             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1282 }
1283
1284 /*
1285  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1286  */
1287 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1288         scsi_qla_host_t *vha,
1289         const uint16_t loop_id)
1290 {
1291         struct tcm_qla2xxx_lport *lport;
1292         struct se_node_acl *se_nacl;
1293         struct tcm_qla2xxx_nacl *nacl;
1294         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1295
1296         lport = vha->vha_tgt.target_lport_ptr;
1297         if (!lport) {
1298                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1299                 dump_stack();
1300                 return NULL;
1301         }
1302
1303         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1304
1305         fc_loopid = lport->lport_loopid_map + loop_id;
1306         se_nacl = fc_loopid->se_nacl;
1307         if (!se_nacl) {
1308                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1309                     loop_id);
1310                 return NULL;
1311         }
1312
1313         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1314
1315         if (!nacl->fc_port) {
1316                 pr_err("Unable to locate struct fc_port\n");
1317                 return NULL;
1318         }
1319
1320         return nacl->fc_port;
1321 }
1322
1323 /*
1324  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1325  */
1326 static void tcm_qla2xxx_set_sess_by_loop_id(
1327         struct tcm_qla2xxx_lport *lport,
1328         struct se_node_acl *new_se_nacl,
1329         struct tcm_qla2xxx_nacl *nacl,
1330         struct se_session *se_sess,
1331         struct fc_port *fc_port,
1332         uint16_t loop_id)
1333 {
1334         struct se_node_acl *saved_nacl;
1335         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1336
1337         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1338
1339         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1340                         lport->lport_loopid_map)[loop_id];
1341
1342         saved_nacl = fc_loopid->se_nacl;
1343         if (!saved_nacl) {
1344                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1345                 fc_loopid->se_nacl = new_se_nacl;
1346                 if (fc_port->se_sess != se_sess)
1347                         fc_port->se_sess = se_sess;
1348                 if (nacl->fc_port != fc_port)
1349                         nacl->fc_port = fc_port;
1350                 return;
1351         }
1352
1353         if (nacl->fc_port) {
1354                 if (new_se_nacl == NULL) {
1355                         pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1356                         fc_loopid->se_nacl = NULL;
1357                         nacl->fc_port = NULL;
1358                         return;
1359                 }
1360
1361                 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1362                 fc_loopid->se_nacl = new_se_nacl;
1363                 if (fc_port->se_sess != se_sess)
1364                         fc_port->se_sess = se_sess;
1365                 if (nacl->fc_port != fc_port)
1366                         nacl->fc_port = fc_port;
1367                 return;
1368         }
1369
1370         if (new_se_nacl == NULL) {
1371                 pr_debug("Clearing fc_loopid->se_nacl\n");
1372                 fc_loopid->se_nacl = NULL;
1373                 return;
1374         }
1375
1376         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1377         fc_loopid->se_nacl = new_se_nacl;
1378         if (fc_port->se_sess != se_sess)
1379                 fc_port->se_sess = se_sess;
1380         if (nacl->fc_port != fc_port)
1381                 nacl->fc_port = fc_port;
1382
1383         pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1384             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1385 }
1386
1387 /*
1388  * Should always be called with qla_hw_data->tgt.sess_lock held.
1389  */
1390 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1391                 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1392 {
1393         struct se_session *se_sess = sess->se_sess;
1394         unsigned char be_sid[3];
1395
1396         be_sid[0] = sess->d_id.b.domain;
1397         be_sid[1] = sess->d_id.b.area;
1398         be_sid[2] = sess->d_id.b.al_pa;
1399
1400         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1401                                 sess, be_sid);
1402         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1403                                 sess, sess->loop_id);
1404 }
1405
1406 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1407 {
1408         struct qla_tgt *tgt = sess->tgt;
1409         struct qla_hw_data *ha = tgt->ha;
1410         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1411         struct se_session *se_sess;
1412         struct tcm_qla2xxx_lport *lport;
1413
1414         BUG_ON(in_interrupt());
1415
1416         se_sess = sess->se_sess;
1417         if (!se_sess) {
1418                 pr_err("struct fc_port->se_sess is NULL\n");
1419                 dump_stack();
1420                 return;
1421         }
1422
1423         lport = vha->vha_tgt.target_lport_ptr;
1424         if (!lport) {
1425                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1426                 dump_stack();
1427                 return;
1428         }
1429         target_wait_for_sess_cmds(se_sess);
1430
1431         target_remove_session(se_sess);
1432 }
1433
1434 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1435                                   struct se_session *se_sess, void *p)
1436 {
1437         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1438                                 struct tcm_qla2xxx_tpg, se_tpg);
1439         struct tcm_qla2xxx_lport *lport = tpg->lport;
1440         struct qla_hw_data *ha = lport->qla_vha->hw;
1441         struct se_node_acl *se_nacl = se_sess->se_node_acl;
1442         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1443                                 struct tcm_qla2xxx_nacl, se_node_acl);
1444         struct fc_port *qlat_sess = p;
1445         uint16_t loop_id = qlat_sess->loop_id;
1446         unsigned long flags;
1447         unsigned char be_sid[3];
1448
1449         be_sid[0] = qlat_sess->d_id.b.domain;
1450         be_sid[1] = qlat_sess->d_id.b.area;
1451         be_sid[2] = qlat_sess->d_id.b.al_pa;
1452
1453         /*
1454          * And now setup se_nacl and session pointers into HW lport internal
1455          * mappings for fabric S_ID and LOOP_ID.
1456          */
1457         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1458         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl,
1459                                      se_sess, qlat_sess, be_sid);
1460         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1461                                         se_sess, qlat_sess, loop_id);
1462         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1463
1464         return 0;
1465 }
1466
1467 /*
1468  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1469  * to locate struct se_node_acl
1470  */
1471 static int tcm_qla2xxx_check_initiator_node_acl(
1472         scsi_qla_host_t *vha,
1473         unsigned char *fc_wwpn,
1474         struct fc_port *qlat_sess)
1475 {
1476         struct qla_hw_data *ha = vha->hw;
1477         struct tcm_qla2xxx_lport *lport;
1478         struct tcm_qla2xxx_tpg *tpg;
1479         struct se_session *se_sess;
1480         unsigned char port_name[36];
1481         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1482                        TCM_QLA2XXX_DEFAULT_TAGS;
1483
1484         lport = vha->vha_tgt.target_lport_ptr;
1485         if (!lport) {
1486                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1487                 dump_stack();
1488                 return -EINVAL;
1489         }
1490         /*
1491          * Locate the TPG=1 reference..
1492          */
1493         tpg = lport->tpg_1;
1494         if (!tpg) {
1495                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1496                 return -EINVAL;
1497         }
1498         /*
1499          * Format the FCP Initiator port_name into colon seperated values to
1500          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1501          */
1502         memset(&port_name, 0, 36);
1503         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1504         /*
1505          * Locate our struct se_node_acl either from an explict NodeACL created
1506          * via ConfigFS, or via running in TPG demo mode.
1507          */
1508         se_sess = target_setup_session(&tpg->se_tpg, num_tags,
1509                                        sizeof(struct qla_tgt_cmd),
1510                                        TARGET_PROT_ALL, port_name,
1511                                        qlat_sess, tcm_qla2xxx_session_cb);
1512         if (IS_ERR(se_sess))
1513                 return PTR_ERR(se_sess);
1514
1515         return 0;
1516 }
1517
1518 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1519                                     uint16_t loop_id, bool conf_compl_supported)
1520 {
1521         struct qla_tgt *tgt = sess->tgt;
1522         struct qla_hw_data *ha = tgt->ha;
1523         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1524         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1525         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1526         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1527                         struct tcm_qla2xxx_nacl, se_node_acl);
1528         u32 key;
1529
1530
1531         if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1532                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1533                     sess, sess->port_name,
1534                     sess->loop_id, loop_id, sess->d_id.b.domain,
1535                     sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1536                     s_id.b.area, s_id.b.al_pa);
1537
1538         if (sess->loop_id != loop_id) {
1539                 /*
1540                  * Because we can shuffle loop IDs around and we
1541                  * update different sessions non-atomically, we might
1542                  * have overwritten this session's old loop ID
1543                  * already, and we might end up overwriting some other
1544                  * session that will be updated later.  So we have to
1545                  * be extra careful and we can't warn about those things...
1546                  */
1547                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1548                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1549
1550                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1551
1552                 sess->loop_id = loop_id;
1553         }
1554
1555         if (sess->d_id.b24 != s_id.b24) {
1556                 key = (((u32) sess->d_id.b.domain << 16) |
1557                        ((u32) sess->d_id.b.area   <<  8) |
1558                        ((u32) sess->d_id.b.al_pa));
1559
1560                 if (btree_lookup32(&lport->lport_fcport_map, key))
1561                         WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1562                             se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1563                             sess->d_id.b.domain, sess->d_id.b.area,
1564                             sess->d_id.b.al_pa);
1565                 else
1566                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1567                              sess->d_id.b.domain, sess->d_id.b.area,
1568                              sess->d_id.b.al_pa);
1569
1570                 key = (((u32) s_id.b.domain << 16) |
1571                        ((u32) s_id.b.area   <<  8) |
1572                        ((u32) s_id.b.al_pa));
1573
1574                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1575                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1576                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1577                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1578                 } else {
1579                         btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1580                             GFP_ATOMIC);
1581                 }
1582
1583                 sess->d_id = s_id;
1584                 nacl->nport_id = key;
1585         }
1586
1587         sess->conf_compl_supported = conf_compl_supported;
1588
1589 }
1590
1591 /*
1592  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1593  */
1594 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1595         .find_cmd_by_tag        = tcm_qla2xxx_find_cmd_by_tag,
1596         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1597         .handle_data            = tcm_qla2xxx_handle_data,
1598         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1599         .free_cmd               = tcm_qla2xxx_free_cmd,
1600         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1601         .free_session           = tcm_qla2xxx_free_session,
1602         .update_sess            = tcm_qla2xxx_update_sess,
1603         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1604         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1605         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1606         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1607         .put_sess               = tcm_qla2xxx_put_sess,
1608         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1609         .get_dif_tags           = tcm_qla2xxx_dif_tags,
1610         .chk_dif_tags           = tcm_qla2xxx_chk_dif_tags,
1611 };
1612
1613 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1614 {
1615         int rc;
1616
1617         rc = btree_init32(&lport->lport_fcport_map);
1618         if (rc) {
1619                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1620                 return rc;
1621         }
1622
1623         lport->lport_loopid_map =
1624                 vzalloc(array_size(65536,
1625                                    sizeof(struct tcm_qla2xxx_fc_loopid)));
1626         if (!lport->lport_loopid_map) {
1627                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1628                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1629                 btree_destroy32(&lport->lport_fcport_map);
1630                 return -ENOMEM;
1631         }
1632         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1633                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1634         return 0;
1635 }
1636
1637 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1638                                          void *target_lport_ptr,
1639                                          u64 npiv_wwpn, u64 npiv_wwnn)
1640 {
1641         struct qla_hw_data *ha = vha->hw;
1642         struct tcm_qla2xxx_lport *lport =
1643                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1644         /*
1645          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1646          */
1647         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1648         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1649         lport->qla_vha = vha;
1650
1651         return 0;
1652 }
1653
1654 static struct se_wwn *tcm_qla2xxx_make_lport(
1655         struct target_fabric_configfs *tf,
1656         struct config_group *group,
1657         const char *name)
1658 {
1659         struct tcm_qla2xxx_lport *lport;
1660         u64 wwpn;
1661         int ret = -ENODEV;
1662
1663         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1664                 return ERR_PTR(-EINVAL);
1665
1666         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1667         if (!lport) {
1668                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1669                 return ERR_PTR(-ENOMEM);
1670         }
1671         lport->lport_wwpn = wwpn;
1672         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1673                                 wwpn);
1674         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1675
1676         ret = tcm_qla2xxx_init_lport(lport);
1677         if (ret != 0)
1678                 goto out;
1679
1680         ret = qlt_lport_register(lport, wwpn, 0, 0,
1681                                  tcm_qla2xxx_lport_register_cb);
1682         if (ret != 0)
1683                 goto out_lport;
1684
1685         return &lport->lport_wwn;
1686 out_lport:
1687         vfree(lport->lport_loopid_map);
1688         btree_destroy32(&lport->lport_fcport_map);
1689 out:
1690         kfree(lport);
1691         return ERR_PTR(ret);
1692 }
1693
1694 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1695 {
1696         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1697                         struct tcm_qla2xxx_lport, lport_wwn);
1698         struct scsi_qla_host *vha = lport->qla_vha;
1699         struct se_node_acl *node;
1700         u32 key = 0;
1701
1702         /*
1703          * Call into qla2x_target.c LLD logic to complete the
1704          * shutdown of struct qla_tgt after the call to
1705          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1706          */
1707         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1708                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1709
1710         qlt_lport_deregister(vha);
1711
1712         vfree(lport->lport_loopid_map);
1713         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1714                 btree_remove32(&lport->lport_fcport_map, key);
1715         btree_destroy32(&lport->lport_fcport_map);
1716         kfree(lport);
1717 }
1718
1719 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1720                                               void *target_lport_ptr,
1721                                               u64 npiv_wwpn, u64 npiv_wwnn)
1722 {
1723         struct fc_vport *vport;
1724         struct Scsi_Host *sh = base_vha->host;
1725         struct scsi_qla_host *npiv_vha;
1726         struct tcm_qla2xxx_lport *lport =
1727                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1728         struct tcm_qla2xxx_lport *base_lport =
1729                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1730         struct fc_vport_identifiers vport_id;
1731
1732         if (qla_ini_mode_enabled(base_vha)) {
1733                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1734                 return -EPERM;
1735         }
1736
1737         if (!base_lport || !base_lport->tpg_1 ||
1738             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1739                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1740                 return -EPERM;
1741         }
1742
1743         memset(&vport_id, 0, sizeof(vport_id));
1744         vport_id.port_name = npiv_wwpn;
1745         vport_id.node_name = npiv_wwnn;
1746         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1747         vport_id.vport_type = FC_PORTTYPE_NPIV;
1748         vport_id.disable = false;
1749
1750         vport = fc_vport_create(sh, 0, &vport_id);
1751         if (!vport) {
1752                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1753                 return -ENODEV;
1754         }
1755         /*
1756          * Setup local pointer to NPIV vhba + target_lport_ptr
1757          */
1758         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1759         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1760         lport->qla_vha = npiv_vha;
1761         scsi_host_get(npiv_vha->host);
1762         return 0;
1763 }
1764
1765
1766 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1767         struct target_fabric_configfs *tf,
1768         struct config_group *group,
1769         const char *name)
1770 {
1771         struct tcm_qla2xxx_lport *lport;
1772         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1773         char *p, tmp[128];
1774         int ret;
1775
1776         snprintf(tmp, 128, "%s", name);
1777
1778         p = strchr(tmp, '@');
1779         if (!p) {
1780                 pr_err("Unable to locate NPIV '@' separator\n");
1781                 return ERR_PTR(-EINVAL);
1782         }
1783         *p++ = '\0';
1784
1785         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1786                 return ERR_PTR(-EINVAL);
1787
1788         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1789                                        &npiv_wwpn, &npiv_wwnn) < 0)
1790                 return ERR_PTR(-EINVAL);
1791
1792         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1793         if (!lport) {
1794                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1795                 return ERR_PTR(-ENOMEM);
1796         }
1797         lport->lport_npiv_wwpn = npiv_wwpn;
1798         lport->lport_npiv_wwnn = npiv_wwnn;
1799         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1800
1801         ret = tcm_qla2xxx_init_lport(lport);
1802         if (ret != 0)
1803                 goto out;
1804
1805         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1806                                  tcm_qla2xxx_lport_register_npiv_cb);
1807         if (ret != 0)
1808                 goto out_lport;
1809
1810         return &lport->lport_wwn;
1811 out_lport:
1812         vfree(lport->lport_loopid_map);
1813         btree_destroy32(&lport->lport_fcport_map);
1814 out:
1815         kfree(lport);
1816         return ERR_PTR(ret);
1817 }
1818
1819 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1820 {
1821         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1822                         struct tcm_qla2xxx_lport, lport_wwn);
1823         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1824         struct qla_hw_data *ha = npiv_vha->hw;
1825         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1826
1827         scsi_host_put(npiv_vha->host);
1828         /*
1829          * Notify libfc that we want to release the vha->fc_vport
1830          */
1831         fc_vport_terminate(npiv_vha->fc_vport);
1832         scsi_host_put(base_vha->host);
1833         kfree(lport);
1834 }
1835
1836
1837 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1838                 char *page)
1839 {
1840         return sprintf(page,
1841             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1842             QLA2XXX_VERSION, utsname()->sysname,
1843             utsname()->machine, utsname()->release);
1844 }
1845
1846 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1847
1848 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1849         &tcm_qla2xxx_wwn_attr_version,
1850         NULL,
1851 };
1852
1853 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1854         .module                         = THIS_MODULE,
1855         .name                           = "qla2xxx",
1856         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1857         /*
1858          * XXX: Limit assumes single page per scatter-gather-list entry.
1859          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1860          */
1861         .max_data_sg_nents              = 1200,
1862         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1863         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1864         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1865         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1866         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1867         .tpg_check_demo_mode_write_protect =
1868                                         tcm_qla2xxx_check_demo_write_protect,
1869         .tpg_check_prod_mode_write_protect =
1870                                         tcm_qla2xxx_check_prod_write_protect,
1871         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1872         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1873         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1874         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1875         .release_cmd                    = tcm_qla2xxx_release_cmd,
1876         .close_session                  = tcm_qla2xxx_close_session,
1877         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1878         .sess_get_initiator_sid         = NULL,
1879         .write_pending                  = tcm_qla2xxx_write_pending,
1880         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1881         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1882         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1883         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1884         .queue_status                   = tcm_qla2xxx_queue_status,
1885         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1886         .aborted_task                   = tcm_qla2xxx_aborted_task,
1887         /*
1888          * Setup function pointers for generic logic in
1889          * target_core_fabric_configfs.c
1890          */
1891         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1892         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1893         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1894         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1895         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1896
1897         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1898         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1899         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1900 };
1901
1902 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1903         .module                         = THIS_MODULE,
1904         .name                           = "qla2xxx_npiv",
1905         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1906         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1907         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1908         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1909         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1910         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1911         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1912         .tpg_check_prod_mode_write_protect =
1913             tcm_qla2xxx_check_prod_write_protect,
1914         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1915         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1916         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1917         .release_cmd                    = tcm_qla2xxx_release_cmd,
1918         .close_session                  = tcm_qla2xxx_close_session,
1919         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1920         .sess_get_initiator_sid         = NULL,
1921         .write_pending                  = tcm_qla2xxx_write_pending,
1922         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1923         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1924         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1925         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1926         .queue_status                   = tcm_qla2xxx_queue_status,
1927         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1928         .aborted_task                   = tcm_qla2xxx_aborted_task,
1929         /*
1930          * Setup function pointers for generic logic in
1931          * target_core_fabric_configfs.c
1932          */
1933         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1934         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1935         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1936         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1937         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1938
1939         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1940         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1941 };
1942
1943 static int tcm_qla2xxx_register_configfs(void)
1944 {
1945         int ret;
1946
1947         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1948             QLA2XXX_VERSION, utsname()->sysname,
1949             utsname()->machine, utsname()->release);
1950
1951         ret = target_register_template(&tcm_qla2xxx_ops);
1952         if (ret)
1953                 return ret;
1954
1955         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1956         if (ret)
1957                 goto out_fabric;
1958
1959         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1960                                                 WQ_MEM_RECLAIM, 0);
1961         if (!tcm_qla2xxx_free_wq) {
1962                 ret = -ENOMEM;
1963                 goto out_fabric_npiv;
1964         }
1965
1966         return 0;
1967
1968 out_fabric_npiv:
1969         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1970 out_fabric:
1971         target_unregister_template(&tcm_qla2xxx_ops);
1972         return ret;
1973 }
1974
1975 static void tcm_qla2xxx_deregister_configfs(void)
1976 {
1977         destroy_workqueue(tcm_qla2xxx_free_wq);
1978
1979         target_unregister_template(&tcm_qla2xxx_ops);
1980         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1981 }
1982
1983 static int __init tcm_qla2xxx_init(void)
1984 {
1985         int ret;
1986
1987         ret = tcm_qla2xxx_register_configfs();
1988         if (ret < 0)
1989                 return ret;
1990
1991         return 0;
1992 }
1993
1994 static void __exit tcm_qla2xxx_exit(void)
1995 {
1996         tcm_qla2xxx_deregister_configfs();
1997 }
1998
1999 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
2000 MODULE_LICENSE("GPL");
2001 module_init(tcm_qla2xxx_init);
2002 module_exit(tcm_qla2xxx_exit);