drivers/scsi/qedi/qedi_fw.c

   1 /*
   2  * QLogic iSCSI Offload Driver
   3  * Copyright (c) 2016 Cavium Inc.
   4  *
   5  * This software is available under the terms of the GNU General Public License
   6  * (GPL) Version 2, available from the file COPYING in the main directory of
   7  * this source tree.
   8  */
   9
  10 #include <linux/blkdev.h>
  11 #include <scsi/scsi_tcq.h>
  12 #include <linux/delay.h>
  13
  14 #include "qedi.h"
  15 #include "qedi_iscsi.h"
  16 #include "qedi_gbl.h"
  17 #include "qedi_fw_iscsi.h"
  18 #include "qedi_fw_scsi.h"
  19
  20 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
  21                                struct iscsi_task *mtask);
  22
  23 void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
  24 {
  25         struct scsi_cmnd *sc = cmd->scsi_cmd;
  26
  27         if (cmd->io_tbl.sge_valid && sc) {
  28                 cmd->io_tbl.sge_valid = 0;
  29                 scsi_dma_unmap(sc);
  30         }
  31 }
  32
  33 static void qedi_process_logout_resp(struct qedi_ctx *qedi,
  34                                      union iscsi_cqe *cqe,
  35                                      struct iscsi_task *task,
  36                                      struct qedi_conn *qedi_conn)
  37 {
  38         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
  39         struct iscsi_logout_rsp *resp_hdr;
  40         struct iscsi_session *session = conn->session;
  41         struct iscsi_logout_response_hdr *cqe_logout_response;
  42         struct qedi_cmd *cmd;
  43
  44         cmd = (struct qedi_cmd *)task->dd_data;
  45         cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
  46         spin_lock(&session->back_lock);
  47         resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
  48         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
  49         resp_hdr->opcode = cqe_logout_response->opcode;
  50         resp_hdr->flags = cqe_logout_response->flags;
  51         resp_hdr->hlength = 0;
  52
  53         resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
  54         resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
  55         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
  56         resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
  57
  58         resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time_2_wait);
  59         resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time_2_retain);
  60
  61         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
  62                   "Freeing tid=0x%x for cid=0x%x\n",
  63                   cmd->task_id, qedi_conn->iscsi_conn_id);
  64
  65         spin_lock(&qedi_conn->list_lock);
  66         if (likely(cmd->io_cmd_in_list)) {
  67                 cmd->io_cmd_in_list = false;
  68                 list_del_init(&cmd->io_cmd);
  69                 qedi_conn->active_cmd_count--;
  70         } else {
  71                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  72                           "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
  73                           cmd->task_id, qedi_conn->iscsi_conn_id,
  74                           &cmd->io_cmd);
  75         }
  76         spin_unlock(&qedi_conn->list_lock);
  77
  78         cmd->state = RESPONSE_RECEIVED;
  79         qedi_clear_task_idx(qedi, cmd->task_id);
  80         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
  81
  82         spin_unlock(&session->back_lock);
  83 }
  84
  85 static void qedi_process_text_resp(struct qedi_ctx *qedi,
  86                                    union iscsi_cqe *cqe,
  87                                    struct iscsi_task *task,
  88                                    struct qedi_conn *qedi_conn)
  89 {
  90         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
  91         struct iscsi_session *session = conn->session;
  92         struct e4_iscsi_task_context *task_ctx;
  93         struct iscsi_text_rsp *resp_hdr_ptr;
  94         struct iscsi_text_response_hdr *cqe_text_response;
  95         struct qedi_cmd *cmd;
  96         int pld_len;
  97
  98         cmd = (struct qedi_cmd *)task->dd_data;
  99         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
 100
 101         cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
 102         spin_lock(&session->back_lock);
 103         resp_hdr_ptr =  (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
 104         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
 105         resp_hdr_ptr->opcode = cqe_text_response->opcode;
 106         resp_hdr_ptr->flags = cqe_text_response->flags;
 107         resp_hdr_ptr->hlength = 0;
 108
 109         hton24(resp_hdr_ptr->dlength,
 110                (cqe_text_response->hdr_second_dword &
 111                 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 112
 113         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 114                                       conn->session->age);
 115         resp_hdr_ptr->ttt = cqe_text_response->ttt;
 116         resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
 117         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
 118         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
 119
 120         pld_len = cqe_text_response->hdr_second_dword &
 121                   ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 122         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 123
 124         memset(task_ctx, '\0', sizeof(*task_ctx));
 125
 126         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 127                   "Freeing tid=0x%x for cid=0x%x\n",
 128                   cmd->task_id, qedi_conn->iscsi_conn_id);
 129
 130         spin_lock(&qedi_conn->list_lock);
 131         if (likely(cmd->io_cmd_in_list)) {
 132                 cmd->io_cmd_in_list = false;
 133                 list_del_init(&cmd->io_cmd);
 134                 qedi_conn->active_cmd_count--;
 135         } else {
 136                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 137                           "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
 138                           cmd->task_id, qedi_conn->iscsi_conn_id,
 139                           &cmd->io_cmd);
 140         }
 141         spin_unlock(&qedi_conn->list_lock);
 142
 143         cmd->state = RESPONSE_RECEIVED;
 144         qedi_clear_task_idx(qedi, cmd->task_id);
 145
 146         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 147                              qedi_conn->gen_pdu.resp_buf,
 148                              (qedi_conn->gen_pdu.resp_wr_ptr -
 149                               qedi_conn->gen_pdu.resp_buf));
 150         spin_unlock(&session->back_lock);
 151 }
 152
 153 static void qedi_tmf_resp_work(struct work_struct *work)
 154 {
 155         struct qedi_cmd *qedi_cmd =
 156                                 container_of(work, struct qedi_cmd, tmf_work);
 157         struct qedi_conn *qedi_conn = qedi_cmd->conn;
 158         struct qedi_ctx *qedi = qedi_conn->qedi;
 159         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 160         struct iscsi_session *session = conn->session;
 161         struct iscsi_tm_rsp *resp_hdr_ptr;
 162         struct iscsi_cls_session *cls_sess;
 163         int rval = 0;
 164
 165         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 166         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 167         cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
 168
 169         iscsi_block_session(session->cls_session);
 170         rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
 171         if (rval) {
 172                 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 173                 iscsi_unblock_session(session->cls_session);
 174                 goto exit_tmf_resp;
 175         }
 176
 177         iscsi_unblock_session(session->cls_session);
 178         qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 179
 180         spin_lock(&session->back_lock);
 181         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 182         spin_unlock(&session->back_lock);
 183
 184 exit_tmf_resp:
 185         kfree(resp_hdr_ptr);
 186         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 187 }
 188
 189 static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
 190                                   union iscsi_cqe *cqe,
 191                                   struct iscsi_task *task,
 192                                   struct qedi_conn *qedi_conn)
 193
 194 {
 195         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 196         struct iscsi_session *session = conn->session;
 197         struct iscsi_tmf_response_hdr *cqe_tmp_response;
 198         struct iscsi_tm_rsp *resp_hdr_ptr;
 199         struct iscsi_tm *tmf_hdr;
 200         struct qedi_cmd *qedi_cmd = NULL;
 201
 202         cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
 203
 204         qedi_cmd = task->dd_data;
 205         qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_ATOMIC);
 206         if (!qedi_cmd->tmf_resp_buf) {
 207                 QEDI_ERR(&qedi->dbg_ctx,
 208                          "Failed to allocate resp buf, cid=0x%x\n",
 209                           qedi_conn->iscsi_conn_id);
 210                 return;
 211         }
 212
 213         spin_lock(&session->back_lock);
 214         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 215         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
 216
 217         /* Fill up the header */
 218         resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
 219         resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
 220         resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
 221         resp_hdr_ptr->hlength = 0;
 222
 223         hton24(resp_hdr_ptr->dlength,
 224                (cqe_tmp_response->hdr_second_dword &
 225                 ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 226         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 227                                       conn->session->age);
 228         resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
 229         resp_hdr_ptr->exp_cmdsn  = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
 230         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
 231
 232         tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
 233
 234         spin_lock(&qedi_conn->list_lock);
 235         if (likely(qedi_cmd->io_cmd_in_list)) {
 236                 qedi_cmd->io_cmd_in_list = false;
 237                 list_del_init(&qedi_cmd->io_cmd);
 238                 qedi_conn->active_cmd_count--;
 239         }
 240         spin_unlock(&qedi_conn->list_lock);
 241
 242         if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 243               ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
 244             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 245               ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
 246             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 247               ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
 248                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
 249                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
 250                 goto unblock_sess;
 251         }
 252
 253         qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 254
 255         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 256         kfree(resp_hdr_ptr);
 257
 258 unblock_sess:
 259         spin_unlock(&session->back_lock);
 260 }
 261
 262 static void qedi_process_login_resp(struct qedi_ctx *qedi,
 263                                     union iscsi_cqe *cqe,
 264                                     struct iscsi_task *task,
 265                                     struct qedi_conn *qedi_conn)
 266 {
 267         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 268         struct iscsi_session *session = conn->session;
 269         struct e4_iscsi_task_context *task_ctx;
 270         struct iscsi_login_rsp *resp_hdr_ptr;
 271         struct iscsi_login_response_hdr *cqe_login_response;
 272         struct qedi_cmd *cmd;
 273         int pld_len;
 274
 275         cmd = (struct qedi_cmd *)task->dd_data;
 276
 277         cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
 278         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
 279
 280         spin_lock(&session->back_lock);
 281         resp_hdr_ptr =  (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
 282         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
 283         resp_hdr_ptr->opcode = cqe_login_response->opcode;
 284         resp_hdr_ptr->flags = cqe_login_response->flags_attr;
 285         resp_hdr_ptr->hlength = 0;
 286
 287         hton24(resp_hdr_ptr->dlength,
 288                (cqe_login_response->hdr_second_dword &
 289                 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 290         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 291                                       conn->session->age);
 292         resp_hdr_ptr->tsih = cqe_login_response->tsih;
 293         resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
 294         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
 295         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
 296         resp_hdr_ptr->status_class = cqe_login_response->status_class;
 297         resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
 298         pld_len = cqe_login_response->hdr_second_dword &
 299                   ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 300         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 301
 302         spin_lock(&qedi_conn->list_lock);
 303         if (likely(cmd->io_cmd_in_list)) {
 304                 cmd->io_cmd_in_list = false;
 305                 list_del_init(&cmd->io_cmd);
 306                 qedi_conn->active_cmd_count--;
 307         }
 308         spin_unlock(&qedi_conn->list_lock);
 309
 310         memset(task_ctx, '\0', sizeof(*task_ctx));
 311
 312         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 313                              qedi_conn->gen_pdu.resp_buf,
 314                              (qedi_conn->gen_pdu.resp_wr_ptr -
 315                              qedi_conn->gen_pdu.resp_buf));
 316
 317         spin_unlock(&session->back_lock);
 318         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 319                   "Freeing tid=0x%x for cid=0x%x\n",
 320                   cmd->task_id, qedi_conn->iscsi_conn_id);
 321         cmd->state = RESPONSE_RECEIVED;
 322         qedi_clear_task_idx(qedi, cmd->task_id);
 323 }
 324
 325 static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
 326                                 struct iscsi_cqe_unsolicited *cqe,
 327                                 char *ptr, int len)
 328 {
 329         u16 idx = 0;
 330
 331         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 332                   "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
 333                   len, qedi->bdq_prod_idx,
 334                   (qedi->bdq_prod_idx % qedi->rq_num_entries));
 335
 336         /* Obtain buffer address from rqe_opaque */
 337         idx = cqe->rqe_opaque;
 338         if (idx > (QEDI_BDQ_NUM - 1)) {
 339                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 340                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 341                           idx);
 342                 return;
 343         }
 344
 345         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 346                   "rqe_opaque [0x%p], idx [%d]\n", cqe->rqe_opaque, idx);
 347
 348         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 349                   "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
 350         switch (cqe->unsol_cqe_type) {
 351         case ISCSI_CQE_UNSOLICITED_SINGLE:
 352         case ISCSI_CQE_UNSOLICITED_FIRST:
 353                 if (len)
 354                         memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
 355                 break;
 356         case ISCSI_CQE_UNSOLICITED_MIDDLE:
 357         case ISCSI_CQE_UNSOLICITED_LAST:
 358                 break;
 359         default:
 360                 break;
 361         }
 362 }
 363
 364 static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
 365                                 struct iscsi_cqe_unsolicited *cqe,
 366                                 int count)
 367 {
 368         u16 tmp;
 369         u16 idx = 0;
 370         struct scsi_bd *pbl;
 371
 372         /* Obtain buffer address from rqe_opaque */
 373         idx = cqe->rqe_opaque;
 374         if (idx > (QEDI_BDQ_NUM - 1)) {
 375                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 376                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 377                           idx);
 378                 return;
 379         }
 380
 381         pbl = (struct scsi_bd *)qedi->bdq_pbl;
 382         pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
 383         pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
 384         pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
 385         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 386                   "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
 387                   pbl, pbl->address.hi, pbl->address.lo, idx);
 388         pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
 389         pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
 390         pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
 391         pbl->opaque.iscsi_opaque.opaque = cpu_to_le32(idx);
 392
 393         /* Increment producer to let f/w know we've handled the frame */
 394         qedi->bdq_prod_idx += count;
 395
 396         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
 397         tmp = readw(qedi->bdq_primary_prod);
 398
 399         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
 400         tmp = readw(qedi->bdq_secondary_prod);
 401 }
 402
 403 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
 404                                       struct iscsi_cqe_unsolicited *cqe,
 405                                       u32 pdu_len, u32 num_bdqs,
 406                                       char *bdq_data)
 407 {
 408         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 409                   "num_bdqs [%d]\n", num_bdqs);
 410
 411         qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
 412         qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
 413 }
 414
 415 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
 416                                    union iscsi_cqe *cqe,
 417                                    struct iscsi_task *task,
 418                                    struct qedi_conn *qedi_conn, u16 que_idx)
 419 {
 420         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 421         struct iscsi_session *session = conn->session;
 422         struct iscsi_nop_in_hdr *cqe_nop_in;
 423         struct iscsi_nopin *hdr;
 424         struct qedi_cmd *cmd;
 425         int tgt_async_nop = 0;
 426         u32 lun[2];
 427         u32 pdu_len, num_bdqs;
 428         char bdq_data[QEDI_BDQ_BUF_SIZE];
 429         unsigned long flags;
 430
 431         spin_lock_bh(&session->back_lock);
 432         cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
 433
 434         pdu_len = cqe_nop_in->hdr_second_dword &
 435                   ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
 436         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 437
 438         hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
 439         memset(hdr, 0, sizeof(struct iscsi_hdr));
 440         hdr->opcode = cqe_nop_in->opcode;
 441         hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
 442         hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
 443         hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
 444         hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
 445
 446         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 447                 spin_lock_irqsave(&qedi->hba_lock, flags);
 448                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 449                                           pdu_len, num_bdqs, bdq_data);
 450                 hdr->itt = RESERVED_ITT;
 451                 tgt_async_nop = 1;
 452                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 453                 goto done;
 454         }
 455
 456         /* Response to one of our nop-outs */
 457         if (task) {
 458                 cmd = task->dd_data;
 459                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
 460                 hdr->itt = build_itt(cqe->cqe_solicited.itid,
 461                                      conn->session->age);
 462                 lun[0] = 0xffffffff;
 463                 lun[1] = 0xffffffff;
 464                 memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
 465                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 466                           "Freeing tid=0x%x for cid=0x%x\n",
 467                           cmd->task_id, qedi_conn->iscsi_conn_id);
 468                 cmd->state = RESPONSE_RECEIVED;
 469                 spin_lock(&qedi_conn->list_lock);
 470                 if (likely(cmd->io_cmd_in_list)) {
 471                         cmd->io_cmd_in_list = false;
 472                         list_del_init(&cmd->io_cmd);
 473                         qedi_conn->active_cmd_count--;
 474                 }
 475
 476                 spin_unlock(&qedi_conn->list_lock);
 477                 qedi_clear_task_idx(qedi, cmd->task_id);
 478         }
 479
 480 done:
 481         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
 482
 483         spin_unlock_bh(&session->back_lock);
 484         return tgt_async_nop;
 485 }
 486
 487 static void qedi_process_async_mesg(struct qedi_ctx *qedi,
 488                                     union iscsi_cqe *cqe,
 489                                     struct iscsi_task *task,
 490                                     struct qedi_conn *qedi_conn,
 491                                     u16 que_idx)
 492 {
 493         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 494         struct iscsi_session *session = conn->session;
 495         struct iscsi_async_msg_hdr *cqe_async_msg;
 496         struct iscsi_async *resp_hdr;
 497         u32 lun[2];
 498         u32 pdu_len, num_bdqs;
 499         char bdq_data[QEDI_BDQ_BUF_SIZE];
 500         unsigned long flags;
 501
 502         spin_lock_bh(&session->back_lock);
 503
 504         cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
 505         pdu_len = cqe_async_msg->hdr_second_dword &
 506                 ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
 507         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 508
 509         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 510                 spin_lock_irqsave(&qedi->hba_lock, flags);
 511                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 512                                           pdu_len, num_bdqs, bdq_data);
 513                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 514         }
 515
 516         resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
 517         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
 518         resp_hdr->opcode = cqe_async_msg->opcode;
 519         resp_hdr->flags = 0x80;
 520
 521         lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
 522         lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
 523         memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
 524         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
 525         resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
 526         resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
 527
 528         resp_hdr->async_event = cqe_async_msg->async_event;
 529         resp_hdr->async_vcode = cqe_async_msg->async_vcode;
 530
 531         resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
 532         resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
 533         resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
 534
 535         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
 536                              pdu_len);
 537
 538         spin_unlock_bh(&session->back_lock);
 539 }
 540
 541 static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
 542                                      union iscsi_cqe *cqe,
 543                                      struct iscsi_task *task,
 544                                      struct qedi_conn *qedi_conn,
 545                                      uint16_t que_idx)
 546 {
 547         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 548         struct iscsi_session *session = conn->session;
 549         struct iscsi_reject_hdr *cqe_reject;
 550         struct iscsi_reject *hdr;
 551         u32 pld_len, num_bdqs;
 552         unsigned long flags;
 553
 554         spin_lock_bh(&session->back_lock);
 555         cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
 556         pld_len = cqe_reject->hdr_second_dword &
 557                   ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
 558         num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
 559
 560         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 561                 spin_lock_irqsave(&qedi->hba_lock, flags);
 562                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 563                                           pld_len, num_bdqs, conn->data);
 564                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 565         }
 566         hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
 567         memset(hdr, 0, sizeof(struct iscsi_hdr));
 568         hdr->opcode = cqe_reject->opcode;
 569         hdr->reason = cqe_reject->hdr_reason;
 570         hdr->flags = cqe_reject->hdr_flags;
 571         hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
 572                               ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
 573         hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
 574         hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
 575         hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
 576         hdr->ffffffff = cpu_to_be32(0xffffffff);
 577
 578         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 579                              conn->data, pld_len);
 580         spin_unlock_bh(&session->back_lock);
 581 }
 582
 583 static void qedi_scsi_completion(struct qedi_ctx *qedi,
 584                                  union iscsi_cqe *cqe,
 585                                  struct iscsi_task *task,
 586                                  struct iscsi_conn *conn)
 587 {
 588         struct scsi_cmnd *sc_cmd;
 589         struct qedi_cmd *cmd = task->dd_data;
 590         struct iscsi_session *session = conn->session;
 591         struct iscsi_scsi_rsp *hdr;
 592         struct iscsi_data_in_hdr *cqe_data_in;
 593         int datalen = 0;
 594         struct qedi_conn *qedi_conn;
 595         u32 iscsi_cid;
 596         u8 cqe_err_bits = 0;
 597
 598         iscsi_cid  = cqe->cqe_common.conn_id;
 599         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 600
 601         cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
 602         cqe_err_bits =
 603                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 604
 605         spin_lock_bh(&session->back_lock);
 606         /* get the scsi command */
 607         sc_cmd = cmd->scsi_cmd;
 608
 609         if (!sc_cmd) {
 610                 QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
 611                 goto error;
 612         }
 613
 614         if (!sc_cmd->SCp.ptr) {
 615                 QEDI_WARN(&qedi->dbg_ctx,
 616                           "SCp.ptr is NULL, returned in another context.\n");
 617                 goto error;
 618         }
 619
 620         if (!sc_cmd->request) {
 621                 QEDI_WARN(&qedi->dbg_ctx,
 622                           "sc_cmd->request is NULL, sc_cmd=%p.\n",
 623                           sc_cmd);
 624                 goto error;
 625         }
 626
 627         if (!sc_cmd->request->special) {
 628                 QEDI_WARN(&qedi->dbg_ctx,
 629                           "request->special is NULL so request not valid, sc_cmd=%p.\n",
 630                           sc_cmd);
 631                 goto error;
 632         }
 633
 634         if (!sc_cmd->request->q) {
 635                 QEDI_WARN(&qedi->dbg_ctx,
 636                           "request->q is NULL so request is not valid, sc_cmd=%p.\n",
 637                           sc_cmd);
 638                 goto error;
 639         }
 640
 641         qedi_iscsi_unmap_sg_list(cmd);
 642
 643         hdr = (struct iscsi_scsi_rsp *)task->hdr;
 644         hdr->opcode = cqe_data_in->opcode;
 645         hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
 646         hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
 647         hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
 648         hdr->response = cqe_data_in->reserved1;
 649         hdr->cmd_status = cqe_data_in->status_rsvd;
 650         hdr->flags = cqe_data_in->flags;
 651         hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
 652
 653         if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
 654                 datalen = cqe_data_in->reserved2 &
 655                           ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
 656                 memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
 657         }
 658
 659         /* If f/w reports data underrun err then set residual to IO transfer
 660          * length, set Underrun flag and clear Overrun flag explicitly
 661          */
 662         if (unlikely(cqe_err_bits &&
 663                      GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
 664                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 665                           "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
 666                           hdr->itt, cqe_data_in->flags, cmd->task_id,
 667                           qedi_conn->iscsi_conn_id, hdr->residual_count,
 668                           scsi_bufflen(sc_cmd));
 669                 hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
 670                 hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
 671                 hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
 672         }
 673
 674         spin_lock(&qedi_conn->list_lock);
 675         if (likely(cmd->io_cmd_in_list)) {
 676                 cmd->io_cmd_in_list = false;
 677                 list_del_init(&cmd->io_cmd);
 678                 qedi_conn->active_cmd_count--;
 679         }
 680         spin_unlock(&qedi_conn->list_lock);
 681
 682         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 683                   "Freeing tid=0x%x for cid=0x%x\n",
 684                   cmd->task_id, qedi_conn->iscsi_conn_id);
 685         cmd->state = RESPONSE_RECEIVED;
 686         if (qedi_io_tracing)
 687                 qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
 688
 689         qedi_clear_task_idx(qedi, cmd->task_id);
 690         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 691                              conn->data, datalen);
 692 error:
 693         spin_unlock_bh(&session->back_lock);
 694 }
 695
 696 static void qedi_mtask_completion(struct qedi_ctx *qedi,
 697                                   union iscsi_cqe *cqe,
 698                                   struct iscsi_task *task,
 699                                   struct qedi_conn *conn, uint16_t que_idx)
 700 {
 701         struct iscsi_conn *iscsi_conn;
 702         u32 hdr_opcode;
 703
 704         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 705         iscsi_conn = conn->cls_conn->dd_data;
 706
 707         switch (hdr_opcode) {
 708         case ISCSI_OPCODE_SCSI_RESPONSE:
 709         case ISCSI_OPCODE_DATA_IN:
 710                 qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
 711                 break;
 712         case ISCSI_OPCODE_LOGIN_RESPONSE:
 713                 qedi_process_login_resp(qedi, cqe, task, conn);
 714                 break;
 715         case ISCSI_OPCODE_TMF_RESPONSE:
 716                 qedi_process_tmf_resp(qedi, cqe, task, conn);
 717                 break;
 718         case ISCSI_OPCODE_TEXT_RESPONSE:
 719                 qedi_process_text_resp(qedi, cqe, task, conn);
 720                 break;
 721         case ISCSI_OPCODE_LOGOUT_RESPONSE:
 722                 qedi_process_logout_resp(qedi, cqe, task, conn);
 723                 break;
 724         case ISCSI_OPCODE_NOP_IN:
 725                 qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
 726                 break;
 727         default:
 728                 QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
 729         }
 730 }
 731
 732 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
 733                                           struct iscsi_cqe_solicited *cqe,
 734                                           struct iscsi_task *task,
 735                                           struct qedi_conn *qedi_conn)
 736 {
 737         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 738         struct iscsi_session *session = conn->session;
 739         struct qedi_cmd *cmd = task->dd_data;
 740
 741         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
 742                   "itid=0x%x, cmd task id=0x%x\n",
 743                   cqe->itid, cmd->task_id);
 744
 745         cmd->state = RESPONSE_RECEIVED;
 746         qedi_clear_task_idx(qedi, cmd->task_id);
 747
 748         spin_lock_bh(&session->back_lock);
 749         __iscsi_put_task(task);
 750         spin_unlock_bh(&session->back_lock);
 751 }
 752
 753 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
 754                                           struct iscsi_cqe_solicited *cqe,
 755                                           struct iscsi_task *task,
 756                                           struct iscsi_conn *conn)
 757 {
 758         struct qedi_work_map *work, *work_tmp;
 759         u32 proto_itt = cqe->itid;
 760         u32 ptmp_itt = 0;
 761         itt_t protoitt = 0;
 762         int found = 0;
 763         struct qedi_cmd *qedi_cmd = NULL;
 764         u32 rtid = 0;
 765         u32 iscsi_cid;
 766         struct qedi_conn *qedi_conn;
 767         struct qedi_cmd *dbg_cmd;
 768         struct iscsi_task *mtask;
 769         struct iscsi_tm *tmf_hdr = NULL;
 770
 771         iscsi_cid = cqe->conn_id;
 772         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 773         if (!qedi_conn) {
 774                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 775                           "icid not found 0x%x\n", cqe->conn_id);
 776                 return;
 777         }
 778
 779         /* Based on this itt get the corresponding qedi_cmd */
 780         spin_lock_bh(&qedi_conn->tmf_work_lock);
 781         list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
 782                                  list) {
 783                 if (work->rtid == proto_itt) {
 784                         /* We found the command */
 785                         qedi_cmd = work->qedi_cmd;
 786                         if (!qedi_cmd->list_tmf_work) {
 787                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 788                                           "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
 789                                           proto_itt, qedi_conn->iscsi_conn_id);
 790                                 WARN_ON(1);
 791                         }
 792                         found = 1;
 793                         mtask = qedi_cmd->task;
 794                         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
 795                         rtid = work->rtid;
 796
 797                         list_del_init(&work->list);
 798                         kfree(work);
 799                         qedi_cmd->list_tmf_work = NULL;
 800                 }
 801         }
 802         spin_unlock_bh(&qedi_conn->tmf_work_lock);
 803
 804         if (found) {
 805                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 806                           "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
 807                           proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
 808
 809                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 810                     ISCSI_TM_FUNC_ABORT_TASK) {
 811                         spin_lock_bh(&conn->session->back_lock);
 812
 813                         protoitt = build_itt(get_itt(tmf_hdr->rtt),
 814                                              conn->session->age);
 815                         task = iscsi_itt_to_task(conn, protoitt);
 816
 817                         spin_unlock_bh(&conn->session->back_lock);
 818
 819                         if (!task) {
 820                                 QEDI_NOTICE(&qedi->dbg_ctx,
 821                                             "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
 822                                             get_itt(tmf_hdr->rtt),
 823                                             qedi_conn->iscsi_conn_id);
 824                                 return;
 825                         }
 826
 827                         dbg_cmd = task->dd_data;
 828
 829                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 830                                   "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
 831                                   get_itt(tmf_hdr->rtt), get_itt(task->itt),
 832                                   dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
 833
 834                         if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
 835                                 qedi_cmd->state = CLEANUP_RECV;
 836
 837                         qedi_clear_task_idx(qedi_conn->qedi, rtid);
 838
 839                         spin_lock(&qedi_conn->list_lock);
 840                         if (likely(dbg_cmd->io_cmd_in_list)) {
 841                                 dbg_cmd->io_cmd_in_list = false;
 842                                 list_del_init(&dbg_cmd->io_cmd);
 843                                 qedi_conn->active_cmd_count--;
 844                         }
 845                         spin_unlock(&qedi_conn->list_lock);
 846                         qedi_cmd->state = CLEANUP_RECV;
 847                         wake_up_interruptible(&qedi_conn->wait_queue);
 848                 }
 849         } else if (qedi_conn->cmd_cleanup_req > 0) {
 850                 spin_lock_bh(&conn->session->back_lock);
 851                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 852                 protoitt = build_itt(ptmp_itt, conn->session->age);
 853                 task = iscsi_itt_to_task(conn, protoitt);
 854                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 855                           "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
 856                           cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
 857                           qedi_conn->iscsi_conn_id);
 858
 859                 spin_unlock_bh(&conn->session->back_lock);
 860                 if (!task) {
 861                         QEDI_NOTICE(&qedi->dbg_ctx,
 862                                     "task is null, itid=0x%x, cid=0x%x\n",
 863                                     cqe->itid, qedi_conn->iscsi_conn_id);
 864                         return;
 865                 }
 866                 qedi_conn->cmd_cleanup_cmpl++;
 867                 wake_up(&qedi_conn->wait_queue);
 868
 869                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 870                           "Freeing tid=0x%x for cid=0x%x\n",
 871                           cqe->itid, qedi_conn->iscsi_conn_id);
 872                 qedi_clear_task_idx(qedi_conn->qedi, cqe->itid);
 873
 874         } else {
 875                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 876                 protoitt = build_itt(ptmp_itt, conn->session->age);
 877                 task = iscsi_itt_to_task(conn, protoitt);
 878                 QEDI_ERR(&qedi->dbg_ctx,
 879                          "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
 880                          protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
 881         }
 882 }
 883
 884 void qedi_fp_process_cqes(struct qedi_work *work)
 885 {
 886         struct qedi_ctx *qedi = work->qedi;
 887         union iscsi_cqe *cqe = &work->cqe;
 888         struct iscsi_task *task = NULL;
 889         struct iscsi_nopout *nopout_hdr;
 890         struct qedi_conn *q_conn;
 891         struct iscsi_conn *conn;
 892         struct qedi_cmd *qedi_cmd;
 893         u32 comp_type;
 894         u32 iscsi_cid;
 895         u32 hdr_opcode;
 896         u16 que_idx = work->que_idx;
 897         u8 cqe_err_bits = 0;
 898
 899         comp_type = cqe->cqe_common.cqe_type;
 900         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 901         cqe_err_bits =
 902                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 903
 904         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 905                   "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
 906                   cqe->cqe_common.conn_id, comp_type, hdr_opcode);
 907
 908         if (comp_type >= MAX_ISCSI_CQES_TYPE) {
 909                 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
 910                 return;
 911         }
 912
 913         iscsi_cid  = cqe->cqe_common.conn_id;
 914         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 915         if (!q_conn) {
 916                 QEDI_WARN(&qedi->dbg_ctx,
 917                           "Session no longer exists for cid=0x%x!!\n",
 918                           iscsi_cid);
 919                 return;
 920         }
 921
 922         conn = q_conn->cls_conn->dd_data;
 923
 924         if (unlikely(cqe_err_bits &&
 925                      GET_FIELD(cqe_err_bits,
 926                                CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
 927                 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
 928                 return;
 929         }
 930
 931         switch (comp_type) {
 932         case ISCSI_CQE_TYPE_SOLICITED:
 933         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
 934                 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
 935                 task = qedi_cmd->task;
 936                 if (!task) {
 937                         QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
 938                         return;
 939                 }
 940
 941                 /* Process NOPIN local completion */
 942                 nopout_hdr = (struct iscsi_nopout *)task->hdr;
 943                 if ((nopout_hdr->itt == RESERVED_ITT) &&
 944                     (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
 945                         qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
 946                                                       task, q_conn);
 947                 } else {
 948                         cqe->cqe_solicited.itid =
 949                                                qedi_get_itt(cqe->cqe_solicited);
 950                         /* Process other solicited responses */
 951                         qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
 952                 }
 953                 break;
 954         case ISCSI_CQE_TYPE_UNSOLICITED:
 955                 switch (hdr_opcode) {
 956                 case ISCSI_OPCODE_NOP_IN:
 957                         qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
 958                                                 que_idx);
 959                         break;
 960                 case ISCSI_OPCODE_ASYNC_MSG:
 961                         qedi_process_async_mesg(qedi, cqe, task, q_conn,
 962                                                 que_idx);
 963                         break;
 964                 case ISCSI_OPCODE_REJECT:
 965                         qedi_process_reject_mesg(qedi, cqe, task, q_conn,
 966                                                  que_idx);
 967                         break;
 968                 }
 969                 goto exit_fp_process;
 970         case ISCSI_CQE_TYPE_DUMMY:
 971                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
 972                 goto exit_fp_process;
 973         case ISCSI_CQE_TYPE_TASK_CLEANUP:
 974                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
 975                 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
 976                                               conn);
 977                 goto exit_fp_process;
 978         default:
 979                 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
 980                 break;
 981         }
 982
 983 exit_fp_process:
 984         return;
 985 }
 986
 987 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
 988 {
 989         struct iscsi_db_data dbell = { 0 };
 990
 991         dbell.agg_flags = 0;
 992
 993         dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
 994         dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
 995         dbell.params |=
 996                    DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
 997
 998         dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
 999         writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
1000
1001         /* Make sure fw write idx is coherent, and include both memory barriers
1002          * as a failsafe as for some architectures the call is the same but on
1003          * others they are two different assembly operations.
1004          */
1005         wmb();
1006         mmiowb();
1007         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
1008                   "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
1009                   qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
1010                   qedi_conn->iscsi_conn_id);
1011 }
1012
1013 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
1014 {
1015         struct qedi_endpoint *ep;
1016         u16 rval;
1017
1018         ep = qedi_conn->ep;
1019         rval = ep->sq_prod_idx;
1020
1021         /* Increament SQ index */
1022         ep->sq_prod_idx++;
1023         ep->fw_sq_prod_idx++;
1024         if (ep->sq_prod_idx == QEDI_SQ_SIZE)
1025                 ep->sq_prod_idx = 0;
1026
1027         return rval;
1028 }
1029
1030 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
1031                           struct iscsi_task *task)
1032 {
1033         struct iscsi_login_req_hdr login_req_pdu_header;
1034         struct scsi_sgl_task_params tx_sgl_task_params;
1035         struct scsi_sgl_task_params rx_sgl_task_params;
1036         struct iscsi_task_params task_params;
1037         struct e4_iscsi_task_context *fw_task_ctx;
1038         struct qedi_ctx *qedi = qedi_conn->qedi;
1039         struct iscsi_login_req *login_hdr;
1040         struct scsi_sge *resp_sge = NULL;
1041         struct qedi_cmd *qedi_cmd;
1042         struct qedi_endpoint *ep;
1043         s16 tid = 0;
1044         u16 sq_idx = 0;
1045         int rval = 0;
1046
1047         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1048         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1049         ep = qedi_conn->ep;
1050         login_hdr = (struct iscsi_login_req *)task->hdr;
1051
1052         tid = qedi_get_task_idx(qedi);
1053         if (tid == -1)
1054                 return -ENOMEM;
1055
1056         fw_task_ctx =
1057              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1058                                                                tid);
1059         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1060
1061         qedi_cmd->task_id = tid;
1062
1063         memset(&task_params, 0, sizeof(task_params));
1064         memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
1065         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1066         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1067         /* Update header info */
1068         login_req_pdu_header.opcode = login_hdr->opcode;
1069         login_req_pdu_header.version_min = login_hdr->min_version;
1070         login_req_pdu_header.version_max = login_hdr->max_version;
1071         login_req_pdu_header.flags_attr = login_hdr->flags;
1072         login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1073         login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1074
1075         login_req_pdu_header.tsih = login_hdr->tsih;
1076         login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1077
1078         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1079         login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1080         login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1081         login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1082         login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1083         login_req_pdu_header.exp_stat_sn = 0;
1084
1085         /* Fill tx AHS and rx buffer */
1086         tx_sgl_task_params.sgl =
1087                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1088         tx_sgl_task_params.sgl_phys_addr.lo =
1089                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1090         tx_sgl_task_params.sgl_phys_addr.hi =
1091                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1092         tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1093         tx_sgl_task_params.num_sges = 1;
1094
1095         rx_sgl_task_params.sgl =
1096                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1097         rx_sgl_task_params.sgl_phys_addr.lo =
1098                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1099         rx_sgl_task_params.sgl_phys_addr.hi =
1100                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1101         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1102         rx_sgl_task_params.num_sges = 1;
1103
1104         /* Fill fw input params */
1105         task_params.context = fw_task_ctx;
1106         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1107         task_params.itid = tid;
1108         task_params.cq_rss_number = 0;
1109         task_params.tx_io_size = ntoh24(login_hdr->dlength);
1110         task_params.rx_io_size = resp_sge->sge_len;
1111
1112         sq_idx = qedi_get_wqe_idx(qedi_conn);
1113         task_params.sqe = &ep->sq[sq_idx];
1114
1115         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1116         rval = init_initiator_login_request_task(&task_params,
1117                                                  &login_req_pdu_header,
1118                                                  &tx_sgl_task_params,
1119                                                  &rx_sgl_task_params);
1120         if (rval)
1121                 return -1;
1122
1123         spin_lock(&qedi_conn->list_lock);
1124         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1125         qedi_cmd->io_cmd_in_list = true;
1126         qedi_conn->active_cmd_count++;
1127         spin_unlock(&qedi_conn->list_lock);
1128
1129         qedi_ring_doorbell(qedi_conn);
1130         return 0;
1131 }
1132
1133 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1134                            struct iscsi_task *task)
1135 {
1136         struct iscsi_logout_req_hdr logout_pdu_header;
1137         struct scsi_sgl_task_params tx_sgl_task_params;
1138         struct scsi_sgl_task_params rx_sgl_task_params;
1139         struct iscsi_task_params task_params;
1140         struct e4_iscsi_task_context *fw_task_ctx;
1141         struct iscsi_logout *logout_hdr = NULL;
1142         struct qedi_ctx *qedi = qedi_conn->qedi;
1143         struct qedi_cmd *qedi_cmd;
1144         struct qedi_endpoint *ep;
1145         s16 tid = 0;
1146         u16 sq_idx = 0;
1147         int rval = 0;
1148
1149         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1150         logout_hdr = (struct iscsi_logout *)task->hdr;
1151         ep = qedi_conn->ep;
1152
1153         tid = qedi_get_task_idx(qedi);
1154         if (tid == -1)
1155                 return -ENOMEM;
1156
1157         fw_task_ctx =
1158              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1159                                                                tid);
1160         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1161
1162         qedi_cmd->task_id = tid;
1163
1164         memset(&task_params, 0, sizeof(task_params));
1165         memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1166         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1167         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1168
1169         /* Update header info */
1170         logout_pdu_header.opcode = logout_hdr->opcode;
1171         logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1172         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1173         logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1174         logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1175         logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1176         logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1177
1178         /* Fill fw input params */
1179         task_params.context = fw_task_ctx;
1180         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1181         task_params.itid = tid;
1182         task_params.cq_rss_number = 0;
1183         task_params.tx_io_size = 0;
1184         task_params.rx_io_size = 0;
1185
1186         sq_idx = qedi_get_wqe_idx(qedi_conn);
1187         task_params.sqe = &ep->sq[sq_idx];
1188         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1189
1190         rval = init_initiator_logout_request_task(&task_params,
1191                                                   &logout_pdu_header,
1192                                                   NULL, NULL);
1193         if (rval)
1194                 return -1;
1195
1196         spin_lock(&qedi_conn->list_lock);
1197         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1198         qedi_cmd->io_cmd_in_list = true;
1199         qedi_conn->active_cmd_count++;
1200         spin_unlock(&qedi_conn->list_lock);
1201
1202         qedi_ring_doorbell(qedi_conn);
1203         return 0;
1204 }
1205
1206 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1207                         struct iscsi_task *task, bool in_recovery)
1208 {
1209         int rval;
1210         struct iscsi_task *ctask;
1211         struct qedi_cmd *cmd, *cmd_tmp;
1212         struct iscsi_tm *tmf_hdr;
1213         unsigned int lun = 0;
1214         bool lun_reset = false;
1215         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1216         struct iscsi_session *session = conn->session;
1217
1218         /* From recovery, task is NULL or from tmf resp valid task */
1219         if (task) {
1220                 tmf_hdr = (struct iscsi_tm *)task->hdr;
1221
1222                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1223                         ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1224                         lun_reset = true;
1225                         lun = scsilun_to_int(&tmf_hdr->lun);
1226                 }
1227         }
1228
1229         qedi_conn->cmd_cleanup_req = 0;
1230         qedi_conn->cmd_cleanup_cmpl = 0;
1231
1232         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1233                   "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1234                   qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1235                   in_recovery, lun_reset);
1236
1237         if (lun_reset)
1238                 spin_lock_bh(&session->back_lock);
1239
1240         spin_lock(&qedi_conn->list_lock);
1241
1242         list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1243                                  io_cmd) {
1244                 ctask = cmd->task;
1245                 if (ctask == task)
1246                         continue;
1247
1248                 if (lun_reset) {
1249                         if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1250                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1251                                           "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1252                                           cmd->task_id, get_itt(ctask->itt),
1253                                           cmd->scsi_cmd, cmd->scsi_cmd->device,
1254                                           ctask->state, cmd->state,
1255                                           qedi_conn->iscsi_conn_id);
1256                                 if (cmd->scsi_cmd->device->lun != lun)
1257                                         continue;
1258                         }
1259                 }
1260                 qedi_conn->cmd_cleanup_req++;
1261                 qedi_iscsi_cleanup_task(ctask, true);
1262
1263                 cmd->io_cmd_in_list = false;
1264                 list_del_init(&cmd->io_cmd);
1265                 qedi_conn->active_cmd_count--;
1266                 QEDI_WARN(&qedi->dbg_ctx,
1267                           "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1268                           &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1269         }
1270
1271         spin_unlock(&qedi_conn->list_lock);
1272
1273         if (lun_reset)
1274                 spin_unlock_bh(&session->back_lock);
1275
1276         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1277                   "cmd_cleanup_req=%d, cid=0x%x\n",
1278                   qedi_conn->cmd_cleanup_req,
1279                   qedi_conn->iscsi_conn_id);
1280
1281         rval  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1282                                                  ((qedi_conn->cmd_cleanup_req ==
1283                                                  qedi_conn->cmd_cleanup_cmpl) ||
1284                                                  qedi_conn->ep),
1285                                                  5 * HZ);
1286         if (rval) {
1287                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1288                           "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1289                           qedi_conn->cmd_cleanup_req,
1290                           qedi_conn->cmd_cleanup_cmpl,
1291                           qedi_conn->iscsi_conn_id);
1292
1293                 return 0;
1294         }
1295
1296         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1297                   "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1298                   qedi_conn->cmd_cleanup_req,
1299                   qedi_conn->cmd_cleanup_cmpl,
1300                   qedi_conn->iscsi_conn_id);
1301
1302         iscsi_host_for_each_session(qedi->shost,
1303                                     qedi_mark_device_missing);
1304         qedi_ops->common->drain(qedi->cdev);
1305
1306         /* Enable IOs for all other sessions except current.*/
1307         if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1308                                               (qedi_conn->cmd_cleanup_req ==
1309                                                qedi_conn->cmd_cleanup_cmpl),
1310                                               5 * HZ)) {
1311                 iscsi_host_for_each_session(qedi->shost,
1312                                             qedi_mark_device_available);
1313                 return -1;
1314         }
1315
1316         iscsi_host_for_each_session(qedi->shost,
1317                                     qedi_mark_device_available);
1318
1319         return 0;
1320 }
1321
1322 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1323                   struct iscsi_task *task)
1324 {
1325         struct qedi_endpoint *qedi_ep;
1326         int rval;
1327
1328         qedi_ep = qedi_conn->ep;
1329         qedi_conn->cmd_cleanup_req = 0;
1330         qedi_conn->cmd_cleanup_cmpl = 0;
1331
1332         if (!qedi_ep) {
1333                 QEDI_WARN(&qedi->dbg_ctx,
1334                           "Cannot proceed, ep already disconnected, cid=0x%x\n",
1335                           qedi_conn->iscsi_conn_id);
1336                 return;
1337         }
1338
1339         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1340                   "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1341                   qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1342
1343         qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1344
1345         rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1346         if (rval) {
1347                 QEDI_ERR(&qedi->dbg_ctx,
1348                          "fatal error, need hard reset, cid=0x%x\n",
1349                          qedi_conn->iscsi_conn_id);
1350                 WARN_ON(1);
1351         }
1352 }
1353
1354 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1355                                          struct qedi_conn *qedi_conn,
1356                                          struct iscsi_task *task,
1357                                          struct qedi_cmd *qedi_cmd,
1358                                          struct qedi_work_map *list_work)
1359 {
1360         struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1361         int wait;
1362
1363         wait  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1364                                                  ((qedi_cmd->state ==
1365                                                    CLEANUP_RECV) ||
1366                                                  ((qedi_cmd->type == TYPEIO) &&
1367                                                   (cmd->state ==
1368                                                    RESPONSE_RECEIVED))),
1369                                                  5 * HZ);
1370         if (!wait) {
1371                 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1372
1373                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1374                           "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1375                           cmd->task_id, qedi_conn->iscsi_conn_id);
1376
1377                 return -1;
1378         }
1379         return 0;
1380 }
1381
1382 static void qedi_tmf_work(struct work_struct *work)
1383 {
1384         struct qedi_cmd *qedi_cmd =
1385                 container_of(work, struct qedi_cmd, tmf_work);
1386         struct qedi_conn *qedi_conn = qedi_cmd->conn;
1387         struct qedi_ctx *qedi = qedi_conn->qedi;
1388         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1389         struct iscsi_cls_session *cls_sess;
1390         struct qedi_work_map *list_work = NULL;
1391         struct iscsi_task *mtask;
1392         struct qedi_cmd *cmd;
1393         struct iscsi_task *ctask;
1394         struct iscsi_tm *tmf_hdr;
1395         s16 rval = 0;
1396         s16 tid = 0;
1397
1398         mtask = qedi_cmd->task;
1399         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1400         cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
1401         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1402
1403         ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1404         if (!ctask || !ctask->sc) {
1405                 QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
1406                 goto abort_ret;
1407         }
1408
1409         cmd = (struct qedi_cmd *)ctask->dd_data;
1410         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1411                   "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1412                   get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1413                   qedi_conn->iscsi_conn_id);
1414
1415         if (qedi_do_not_recover) {
1416                 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1417                          qedi_do_not_recover);
1418                 goto abort_ret;
1419         }
1420
1421         list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
1422         if (!list_work) {
1423                 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1424                 goto abort_ret;
1425         }
1426
1427         qedi_cmd->type = TYPEIO;
1428         list_work->qedi_cmd = qedi_cmd;
1429         list_work->rtid = cmd->task_id;
1430         list_work->state = QEDI_WORK_SCHEDULED;
1431         qedi_cmd->list_tmf_work = list_work;
1432
1433         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1434                   "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1435                   list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1436                   tmf_hdr->flags);
1437
1438         spin_lock_bh(&qedi_conn->tmf_work_lock);
1439         list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1440         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1441
1442         qedi_iscsi_cleanup_task(ctask, false);
1443
1444         rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1445                                              list_work);
1446         if (rval == -1) {
1447                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1448                           "FW cleanup got escalated, cid=0x%x\n",
1449                           qedi_conn->iscsi_conn_id);
1450                 goto ldel_exit;
1451         }
1452
1453         tid = qedi_get_task_idx(qedi);
1454         if (tid == -1) {
1455                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1456                          qedi_conn->iscsi_conn_id);
1457                 goto ldel_exit;
1458         }
1459
1460         qedi_cmd->task_id = tid;
1461         qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1462
1463 abort_ret:
1464         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1465         return;
1466
1467 ldel_exit:
1468         spin_lock_bh(&qedi_conn->tmf_work_lock);
1469         if (qedi_cmd->list_tmf_work) {
1470                 list_del_init(&list_work->list);
1471                 qedi_cmd->list_tmf_work = NULL;
1472                 kfree(list_work);
1473         }
1474         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1475
1476         spin_lock(&qedi_conn->list_lock);
1477         if (likely(cmd->io_cmd_in_list)) {
1478                 cmd->io_cmd_in_list = false;
1479                 list_del_init(&cmd->io_cmd);
1480                 qedi_conn->active_cmd_count--;
1481         }
1482         spin_unlock(&qedi_conn->list_lock);
1483
1484         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1485 }
1486
1487 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
1488                                struct iscsi_task *mtask)
1489 {
1490         struct iscsi_tmf_request_hdr tmf_pdu_header;
1491         struct iscsi_task_params task_params;
1492         struct qedi_ctx *qedi = qedi_conn->qedi;
1493         struct e4_iscsi_task_context *fw_task_ctx;
1494         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1495         struct iscsi_task *ctask;
1496         struct iscsi_tm *tmf_hdr;
1497         struct qedi_cmd *qedi_cmd;
1498         struct qedi_cmd *cmd;
1499         struct qedi_endpoint *ep;
1500         u32 scsi_lun[2];
1501         s16 tid = 0;
1502         u16 sq_idx = 0;
1503         int rval = 0;
1504
1505         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1506         qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1507         ep = qedi_conn->ep;
1508         if (!ep)
1509                 return -ENODEV;
1510
1511         tid = qedi_get_task_idx(qedi);
1512         if (tid == -1)
1513                 return -ENOMEM;
1514
1515         fw_task_ctx =
1516              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1517                                                                tid);
1518         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1519
1520         qedi_cmd->task_id = tid;
1521
1522         memset(&task_params, 0, sizeof(task_params));
1523         memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1524
1525         /* Update header info */
1526         qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1527         tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1528         tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1529
1530         memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1531         tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1532         tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1533
1534         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1535              ISCSI_TM_FUNC_ABORT_TASK) {
1536                 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1537                 if (!ctask || !ctask->sc) {
1538                         QEDI_ERR(&qedi->dbg_ctx,
1539                                  "Could not get reference task\n");
1540                         return 0;
1541                 }
1542                 cmd = (struct qedi_cmd *)ctask->dd_data;
1543                 tmf_pdu_header.rtt =
1544                                 qedi_set_itt(cmd->task_id,
1545                                              get_itt(tmf_hdr->rtt));
1546         } else {
1547                 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1548         }
1549
1550         tmf_pdu_header.opcode = tmf_hdr->opcode;
1551         tmf_pdu_header.function = tmf_hdr->flags;
1552         tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1553         tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1554
1555         /* Fill fw input params */
1556         task_params.context = fw_task_ctx;
1557         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1558         task_params.itid = tid;
1559         task_params.cq_rss_number = 0;
1560         task_params.tx_io_size = 0;
1561         task_params.rx_io_size = 0;
1562
1563         sq_idx = qedi_get_wqe_idx(qedi_conn);
1564         task_params.sqe = &ep->sq[sq_idx];
1565
1566         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1567         rval = init_initiator_tmf_request_task(&task_params,
1568                                                &tmf_pdu_header);
1569         if (rval)
1570                 return -1;
1571
1572         spin_lock(&qedi_conn->list_lock);
1573         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1574         qedi_cmd->io_cmd_in_list = true;
1575         qedi_conn->active_cmd_count++;
1576         spin_unlock(&qedi_conn->list_lock);
1577
1578         qedi_ring_doorbell(qedi_conn);
1579         return 0;
1580 }
1581
1582 int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
1583                           struct iscsi_task *mtask)
1584 {
1585         struct qedi_ctx *qedi = qedi_conn->qedi;
1586         struct iscsi_tm *tmf_hdr;
1587         struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1588         s16 tid = 0;
1589
1590         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1591         qedi_cmd->task = mtask;
1592
1593         /* If abort task then schedule the work and return */
1594         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1595             ISCSI_TM_FUNC_ABORT_TASK) {
1596                 qedi_cmd->state = CLEANUP_WAIT;
1597                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
1598                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1599
1600         } else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1601                     ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
1602                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1603                     ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
1604                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1605                     ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
1606                 tid = qedi_get_task_idx(qedi);
1607                 if (tid == -1) {
1608                         QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1609                                  qedi_conn->iscsi_conn_id);
1610                         return -1;
1611                 }
1612                 qedi_cmd->task_id = tid;
1613
1614                 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1615
1616         } else {
1617                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1618                          qedi_conn->iscsi_conn_id);
1619                 return -1;
1620         }
1621
1622         return 0;
1623 }
1624
1625 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1626                          struct iscsi_task *task)
1627 {
1628         struct iscsi_text_request_hdr text_request_pdu_header;
1629         struct scsi_sgl_task_params tx_sgl_task_params;
1630         struct scsi_sgl_task_params rx_sgl_task_params;
1631         struct iscsi_task_params task_params;
1632         struct e4_iscsi_task_context *fw_task_ctx;
1633         struct qedi_ctx *qedi = qedi_conn->qedi;
1634         struct iscsi_text *text_hdr;
1635         struct scsi_sge *req_sge = NULL;
1636         struct scsi_sge *resp_sge = NULL;
1637         struct qedi_cmd *qedi_cmd;
1638         struct qedi_endpoint *ep;
1639         s16 tid = 0;
1640         u16 sq_idx = 0;
1641         int rval = 0;
1642
1643         req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1644         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1645         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1646         text_hdr = (struct iscsi_text *)task->hdr;
1647         ep = qedi_conn->ep;
1648
1649         tid = qedi_get_task_idx(qedi);
1650         if (tid == -1)
1651                 return -ENOMEM;
1652
1653         fw_task_ctx =
1654              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1655                                                                tid);
1656         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1657
1658         qedi_cmd->task_id = tid;
1659
1660         memset(&task_params, 0, sizeof(task_params));
1661         memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1662         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1663         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1664
1665         /* Update header info */
1666         text_request_pdu_header.opcode = text_hdr->opcode;
1667         text_request_pdu_header.flags_attr = text_hdr->flags;
1668
1669         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1670         text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1671         text_request_pdu_header.ttt = text_hdr->ttt;
1672         text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1673         text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1674         text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1675
1676         /* Fill tx AHS and rx buffer */
1677         tx_sgl_task_params.sgl =
1678                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1679         tx_sgl_task_params.sgl_phys_addr.lo =
1680                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1681         tx_sgl_task_params.sgl_phys_addr.hi =
1682                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1683         tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1684         tx_sgl_task_params.num_sges = 1;
1685
1686         rx_sgl_task_params.sgl =
1687                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1688         rx_sgl_task_params.sgl_phys_addr.lo =
1689                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1690         rx_sgl_task_params.sgl_phys_addr.hi =
1691                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1692         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1693         rx_sgl_task_params.num_sges = 1;
1694
1695         /* Fill fw input params */
1696         task_params.context = fw_task_ctx;
1697         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1698         task_params.itid = tid;
1699         task_params.cq_rss_number = 0;
1700         task_params.tx_io_size = ntoh24(text_hdr->dlength);
1701         task_params.rx_io_size = resp_sge->sge_len;
1702
1703         sq_idx = qedi_get_wqe_idx(qedi_conn);
1704         task_params.sqe = &ep->sq[sq_idx];
1705
1706         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1707         rval = init_initiator_text_request_task(&task_params,
1708                                                 &text_request_pdu_header,
1709                                                 &tx_sgl_task_params,
1710                                                 &rx_sgl_task_params);
1711         if (rval)
1712                 return -1;
1713
1714         spin_lock(&qedi_conn->list_lock);
1715         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1716         qedi_cmd->io_cmd_in_list = true;
1717         qedi_conn->active_cmd_count++;
1718         spin_unlock(&qedi_conn->list_lock);
1719
1720         qedi_ring_doorbell(qedi_conn);
1721         return 0;
1722 }
1723
1724 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1725                            struct iscsi_task *task,
1726                            char *datap, int data_len, int unsol)
1727 {
1728         struct iscsi_nop_out_hdr nop_out_pdu_header;
1729         struct scsi_sgl_task_params tx_sgl_task_params;
1730         struct scsi_sgl_task_params rx_sgl_task_params;
1731         struct iscsi_task_params task_params;
1732         struct qedi_ctx *qedi = qedi_conn->qedi;
1733         struct e4_iscsi_task_context *fw_task_ctx;
1734         struct iscsi_nopout *nopout_hdr;
1735         struct scsi_sge *resp_sge = NULL;
1736         struct qedi_cmd *qedi_cmd;
1737         struct qedi_endpoint *ep;
1738         u32 scsi_lun[2];
1739         s16 tid = 0;
1740         u16 sq_idx = 0;
1741         int rval = 0;
1742
1743         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1744         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1745         nopout_hdr = (struct iscsi_nopout *)task->hdr;
1746         ep = qedi_conn->ep;
1747
1748         tid = qedi_get_task_idx(qedi);
1749         if (tid == -1)
1750                 return -ENOMEM;
1751
1752         fw_task_ctx =
1753              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1754                                                                tid);
1755         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1756
1757         qedi_cmd->task_id = tid;
1758
1759         memset(&task_params, 0, sizeof(task_params));
1760         memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1761         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1762         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1763
1764         /* Update header info */
1765         nop_out_pdu_header.opcode = nopout_hdr->opcode;
1766         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1767         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1768
1769         memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1770         nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1771         nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1772         nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1773         nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1774
1775         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1776
1777         if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1778                 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1779                 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1780         } else {
1781                 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1782                 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1783
1784                 spin_lock(&qedi_conn->list_lock);
1785                 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1786                 qedi_cmd->io_cmd_in_list = true;
1787                 qedi_conn->active_cmd_count++;
1788                 spin_unlock(&qedi_conn->list_lock);
1789         }
1790
1791         /* Fill tx AHS and rx buffer */
1792         if (data_len) {
1793                 tx_sgl_task_params.sgl =
1794                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1795                 tx_sgl_task_params.sgl_phys_addr.lo =
1796                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1797                 tx_sgl_task_params.sgl_phys_addr.hi =
1798                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1799                 tx_sgl_task_params.total_buffer_size = data_len;
1800                 tx_sgl_task_params.num_sges = 1;
1801
1802                 rx_sgl_task_params.sgl =
1803                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1804                 rx_sgl_task_params.sgl_phys_addr.lo =
1805                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1806                 rx_sgl_task_params.sgl_phys_addr.hi =
1807                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1808                 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1809                 rx_sgl_task_params.num_sges = 1;
1810         }
1811
1812         /* Fill fw input params */
1813         task_params.context = fw_task_ctx;
1814         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1815         task_params.itid = tid;
1816         task_params.cq_rss_number = 0;
1817         task_params.tx_io_size = data_len;
1818         task_params.rx_io_size = resp_sge->sge_len;
1819
1820         sq_idx = qedi_get_wqe_idx(qedi_conn);
1821         task_params.sqe = &ep->sq[sq_idx];
1822
1823         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1824         rval = init_initiator_nop_out_task(&task_params,
1825                                            &nop_out_pdu_header,
1826                                            &tx_sgl_task_params,
1827                                            &rx_sgl_task_params);
1828         if (rval)
1829                 return -1;
1830
1831         qedi_ring_doorbell(qedi_conn);
1832         return 0;
1833 }
1834
1835 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1836                          int bd_index)
1837 {
1838         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1839         int frag_size, sg_frags;
1840
1841         sg_frags = 0;
1842
1843         while (sg_len) {
1844                 if (addr % QEDI_PAGE_SIZE)
1845                         frag_size =
1846                                    (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1847                 else
1848                         frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1849                                     (sg_len % QEDI_BD_SPLIT_SZ);
1850
1851                 if (frag_size == 0)
1852                         frag_size = QEDI_BD_SPLIT_SZ;
1853
1854                 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1855                 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1856                 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1857                 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1858                           "split sge %d: addr=%llx, len=%x",
1859                           (bd_index + sg_frags), addr, frag_size);
1860
1861                 addr += (u64)frag_size;
1862                 sg_frags++;
1863                 sg_len -= frag_size;
1864         }
1865         return sg_frags;
1866 }
1867
1868 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1869 {
1870         struct scsi_cmnd *sc = cmd->scsi_cmd;
1871         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1872         struct scatterlist *sg;
1873         int byte_count = 0;
1874         int bd_count = 0;
1875         int sg_count;
1876         int sg_len;
1877         int sg_frags;
1878         u64 addr, end_addr;
1879         int i;
1880
1881         WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1882
1883         sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1884                               scsi_sg_count(sc), sc->sc_data_direction);
1885
1886         /*
1887          * New condition to send single SGE as cached-SGL.
1888          * Single SGE with length less than 64K.
1889          */
1890         sg = scsi_sglist(sc);
1891         if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1892                 sg_len = sg_dma_len(sg);
1893                 addr = (u64)sg_dma_address(sg);
1894
1895                 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1896                 bd[bd_count].sge_addr.hi = (addr >> 32);
1897                 bd[bd_count].sge_len = (u16)sg_len;
1898
1899                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1900                           "single-cached-sgl: bd_count:%d addr=%llx, len=%x",
1901                           sg_count, addr, sg_len);
1902
1903                 return ++bd_count;
1904         }
1905
1906         scsi_for_each_sg(sc, sg, sg_count, i) {
1907                 sg_len = sg_dma_len(sg);
1908                 addr = (u64)sg_dma_address(sg);
1909                 end_addr = (addr + sg_len);
1910
1911                 /*
1912                  * first sg elem in the 'list',
1913                  * check if end addr is page-aligned.
1914                  */
1915                 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1916                         cmd->use_slowpath = true;
1917
1918                 /*
1919                  * last sg elem in the 'list',
1920                  * check if start addr is page-aligned.
1921                  */
1922                 else if ((i == (sg_count - 1)) &&
1923                          (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1924                         cmd->use_slowpath = true;
1925
1926                 /*
1927                  * middle sg elements in list,
1928                  * check if start and end addr is page-aligned
1929                  */
1930                 else if ((i != 0) && (i != (sg_count - 1)) &&
1931                          ((addr % QEDI_PAGE_SIZE) ||
1932                          (end_addr % QEDI_PAGE_SIZE)))
1933                         cmd->use_slowpath = true;
1934
1935                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1936                           i, sg_len);
1937
1938                 if (sg_len > QEDI_BD_SPLIT_SZ) {
1939                         sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1940                 } else {
1941                         sg_frags = 1;
1942                         bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1943                         bd[bd_count].sge_addr.hi = addr >> 32;
1944                         bd[bd_count].sge_len = sg_len;
1945                 }
1946                 byte_count += sg_len;
1947                 bd_count += sg_frags;
1948         }
1949
1950         if (byte_count != scsi_bufflen(sc))
1951                 QEDI_ERR(&qedi->dbg_ctx,
1952                          "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1953                          scsi_bufflen(sc));
1954         else
1955                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1956                           byte_count);
1957
1958         WARN_ON(byte_count != scsi_bufflen(sc));
1959
1960         return bd_count;
1961 }
1962
1963 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1964 {
1965         int bd_count;
1966         struct scsi_cmnd *sc = cmd->scsi_cmd;
1967
1968         if (scsi_sg_count(sc)) {
1969                 bd_count  = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1970                 if (bd_count == 0)
1971                         return;
1972         } else {
1973                 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1974
1975                 bd[0].sge_addr.lo = 0;
1976                 bd[0].sge_addr.hi = 0;
1977                 bd[0].sge_len = 0;
1978                 bd_count = 0;
1979         }
1980         cmd->io_tbl.sge_valid = bd_count;
1981 }
1982
1983 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1984 {
1985         u32 dword;
1986         int lpcnt;
1987         u8 *srcp;
1988
1989         lpcnt = sc->cmd_len / sizeof(dword);
1990         srcp = (u8 *)sc->cmnd;
1991         while (lpcnt--) {
1992                 memcpy(&dword, (const void *)srcp, 4);
1993                 *dstp = cpu_to_be32(dword);
1994                 srcp += 4;
1995                 dstp++;
1996         }
1997         if (sc->cmd_len & 0x3) {
1998                 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1999                 *dstp = cpu_to_be32(dword);
2000         }
2001 }
2002
2003 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
2004                    u16 tid, int8_t direction)
2005 {
2006         struct qedi_io_log *io_log;
2007         struct iscsi_conn *conn = task->conn;
2008         struct qedi_conn *qedi_conn = conn->dd_data;
2009         struct scsi_cmnd *sc_cmd = task->sc;
2010         unsigned long flags;
2011
2012         spin_lock_irqsave(&qedi->io_trace_lock, flags);
2013
2014         io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
2015         io_log->direction = direction;
2016         io_log->task_id = tid;
2017         io_log->cid = qedi_conn->iscsi_conn_id;
2018         io_log->lun = sc_cmd->device->lun;
2019         io_log->op = sc_cmd->cmnd[0];
2020         io_log->lba[0] = sc_cmd->cmnd[2];
2021         io_log->lba[1] = sc_cmd->cmnd[3];
2022         io_log->lba[2] = sc_cmd->cmnd[4];
2023         io_log->lba[3] = sc_cmd->cmnd[5];
2024         io_log->bufflen = scsi_bufflen(sc_cmd);
2025         io_log->sg_count = scsi_sg_count(sc_cmd);
2026         io_log->fast_sgs = qedi->fast_sgls;
2027         io_log->cached_sgs = qedi->cached_sgls;
2028         io_log->slow_sgs = qedi->slow_sgls;
2029         io_log->cached_sge = qedi->use_cached_sge;
2030         io_log->slow_sge = qedi->use_slow_sge;
2031         io_log->fast_sge = qedi->use_fast_sge;
2032         io_log->result = sc_cmd->result;
2033         io_log->jiffies = jiffies;
2034         io_log->blk_req_cpu = smp_processor_id();
2035
2036         if (direction == QEDI_IO_TRACE_REQ) {
2037                 /* For requests we only care about the submission CPU */
2038                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2039                 io_log->intr_cpu = 0;
2040                 io_log->blk_rsp_cpu = 0;
2041         } else if (direction == QEDI_IO_TRACE_RSP) {
2042                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2043                 io_log->intr_cpu = qedi->intr_cpu;
2044                 io_log->blk_rsp_cpu = smp_processor_id();
2045         }
2046
2047         qedi->io_trace_idx++;
2048         if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
2049                 qedi->io_trace_idx = 0;
2050
2051         qedi->use_cached_sge = false;
2052         qedi->use_slow_sge = false;
2053         qedi->use_fast_sge = false;
2054
2055         spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
2056 }
2057
2058 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
2059 {
2060         struct iscsi_conn *conn = task->conn;
2061         struct iscsi_session *session = conn->session;
2062         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
2063         struct qedi_ctx *qedi = iscsi_host_priv(shost);
2064         struct qedi_conn *qedi_conn = conn->dd_data;
2065         struct qedi_cmd *cmd = task->dd_data;
2066         struct scsi_cmnd *sc = task->sc;
2067         struct iscsi_cmd_hdr cmd_pdu_header;
2068         struct scsi_sgl_task_params tx_sgl_task_params;
2069         struct scsi_sgl_task_params rx_sgl_task_params;
2070         struct scsi_sgl_task_params *prx_sgl = NULL;
2071         struct scsi_sgl_task_params *ptx_sgl = NULL;
2072         struct iscsi_task_params task_params;
2073         struct iscsi_conn_params conn_params;
2074         struct scsi_initiator_cmd_params cmd_params;
2075         struct e4_iscsi_task_context *fw_task_ctx;
2076         struct iscsi_cls_conn *cls_conn;
2077         struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
2078         enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
2079         struct qedi_endpoint *ep;
2080         u32 scsi_lun[2];
2081         s16 tid = 0;
2082         u16 sq_idx = 0;
2083         u16 cq_idx;
2084         int rval = 0;
2085
2086         ep = qedi_conn->ep;
2087         cls_conn = qedi_conn->cls_conn;
2088         conn = cls_conn->dd_data;
2089
2090         qedi_iscsi_map_sg_list(cmd);
2091         int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2092
2093         tid = qedi_get_task_idx(qedi);
2094         if (tid == -1)
2095                 return -ENOMEM;
2096
2097         fw_task_ctx =
2098              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2099                                                                tid);
2100         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
2101
2102         cmd->task_id = tid;
2103
2104         memset(&task_params, 0, sizeof(task_params));
2105         memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2106         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2107         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2108         memset(&conn_params, 0, sizeof(conn_params));
2109         memset(&cmd_params, 0, sizeof(cmd_params));
2110
2111         cq_idx = smp_processor_id() % qedi->num_queues;
2112         /* Update header info */
2113         SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2114                   ISCSI_ATTR_SIMPLE);
2115         if (hdr->cdb[0] != TEST_UNIT_READY) {
2116                 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2117                         SET_FIELD(cmd_pdu_header.flags_attr,
2118                                   ISCSI_CMD_HDR_WRITE, 1);
2119                         task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2120                 } else {
2121                         SET_FIELD(cmd_pdu_header.flags_attr,
2122                                   ISCSI_CMD_HDR_READ, 1);
2123                         task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2124                 }
2125         }
2126
2127         cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2128         cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2129
2130         qedi_update_itt_map(qedi, tid, task->itt, cmd);
2131         cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2132         cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2133         cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2134         cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2135         cmd_pdu_header.hdr_first_byte = hdr->opcode;
2136         qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2137
2138         /* Fill tx AHS and rx buffer */
2139         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2140                 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2141                 tx_sgl_task_params.sgl_phys_addr.lo =
2142                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2143                 tx_sgl_task_params.sgl_phys_addr.hi =
2144                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2145                 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2146                 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2147                 if (cmd->use_slowpath)
2148                         tx_sgl_task_params.small_mid_sge = true;
2149         } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2150                 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2151                 rx_sgl_task_params.sgl_phys_addr.lo =
2152                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2153                 rx_sgl_task_params.sgl_phys_addr.hi =
2154                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2155                 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2156                 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2157         }
2158
2159         /* Add conn param */
2160         conn_params.first_burst_length = conn->session->first_burst;
2161         conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2162         conn_params.max_burst_length = conn->session->max_burst;
2163         if (conn->session->initial_r2t_en)
2164                 conn_params.initial_r2t = true;
2165         if (conn->session->imm_data_en)
2166                 conn_params.immediate_data = true;
2167
2168         /* Add cmd params */
2169         cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2170         cmd_params.sense_data_buffer_phys_addr.hi =
2171                                         (u32)((u64)cmd->sense_buffer_dma >> 32);
2172         /* Fill fw input params */
2173         task_params.context = fw_task_ctx;
2174         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2175         task_params.itid = tid;
2176         task_params.cq_rss_number = cq_idx;
2177         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2178                 task_params.tx_io_size = scsi_bufflen(sc);
2179         else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2180                 task_params.rx_io_size = scsi_bufflen(sc);
2181
2182         sq_idx = qedi_get_wqe_idx(qedi_conn);
2183         task_params.sqe = &ep->sq[sq_idx];
2184
2185         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2186                   "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2187                   (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2188                   "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2189                   "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2190                   (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2191                   (u32)(cmd->io_tbl.sge_tbl_dma),
2192                   (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2193
2194         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2195
2196         if (task_params.tx_io_size != 0)
2197                 ptx_sgl = &tx_sgl_task_params;
2198         if (task_params.rx_io_size != 0)
2199                 prx_sgl = &rx_sgl_task_params;
2200
2201         rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2202                                             &cmd_params, &cmd_pdu_header,
2203                                             ptx_sgl, prx_sgl,
2204                                             NULL);
2205         if (rval)
2206                 return -1;
2207
2208         spin_lock(&qedi_conn->list_lock);
2209         list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2210         cmd->io_cmd_in_list = true;
2211         qedi_conn->active_cmd_count++;
2212         spin_unlock(&qedi_conn->list_lock);
2213
2214         qedi_ring_doorbell(qedi_conn);
2215         return 0;
2216 }
2217
2218 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2219 {
2220         struct iscsi_task_params task_params;
2221         struct qedi_endpoint *ep;
2222         struct iscsi_conn *conn = task->conn;
2223         struct qedi_conn *qedi_conn = conn->dd_data;
2224         struct qedi_cmd *cmd = task->dd_data;
2225         u16 sq_idx = 0;
2226         int rval = 0;
2227
2228         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2229                   "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2230                   cmd->task_id, get_itt(task->itt), task->state,
2231                   cmd->state, qedi_conn->iscsi_conn_id);
2232
2233         memset(&task_params, 0, sizeof(task_params));
2234         ep = qedi_conn->ep;
2235
2236         sq_idx = qedi_get_wqe_idx(qedi_conn);
2237
2238         task_params.sqe = &ep->sq[sq_idx];
2239         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2240         task_params.itid = cmd->task_id;
2241
2242         rval = init_cleanup_task(&task_params);
2243         if (rval)
2244                 return rval;
2245
2246         qedi_ring_doorbell(qedi_conn);
2247         return 0;
2248 }