drivers/scsi/qedi/qedi_fw.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * QLogic iSCSI Offload Driver
   4  * Copyright (c) 2016 Cavium Inc.
   5  */
   6
   7 #include <linux/blkdev.h>
   8 #include <scsi/scsi_tcq.h>
   9 #include <linux/delay.h>
  10
  11 #include "qedi.h"
  12 #include "qedi_iscsi.h"
  13 #include "qedi_gbl.h"
  14 #include "qedi_fw_iscsi.h"
  15 #include "qedi_fw_scsi.h"
  16
  17 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
  18                                struct iscsi_task *mtask);
  19
  20 void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
  21 {
  22         struct scsi_cmnd *sc = cmd->scsi_cmd;
  23
  24         if (cmd->io_tbl.sge_valid && sc) {
  25                 cmd->io_tbl.sge_valid = 0;
  26                 scsi_dma_unmap(sc);
  27         }
  28 }
  29
  30 static void qedi_process_logout_resp(struct qedi_ctx *qedi,
  31                                      union iscsi_cqe *cqe,
  32                                      struct iscsi_task *task,
  33                                      struct qedi_conn *qedi_conn)
  34 {
  35         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
  36         struct iscsi_logout_rsp *resp_hdr;
  37         struct iscsi_session *session = conn->session;
  38         struct iscsi_logout_response_hdr *cqe_logout_response;
  39         struct qedi_cmd *cmd;
  40
  41         cmd = (struct qedi_cmd *)task->dd_data;
  42         cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
  43         spin_lock(&session->back_lock);
  44         resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
  45         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
  46         resp_hdr->opcode = cqe_logout_response->opcode;
  47         resp_hdr->flags = cqe_logout_response->flags;
  48         resp_hdr->hlength = 0;
  49
  50         resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
  51         resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
  52         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
  53         resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
  54
  55         resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time_2_wait);
  56         resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time_2_retain);
  57
  58         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
  59                   "Freeing tid=0x%x for cid=0x%x\n",
  60                   cmd->task_id, qedi_conn->iscsi_conn_id);
  61
  62         spin_lock(&qedi_conn->list_lock);
  63         if (likely(cmd->io_cmd_in_list)) {
  64                 cmd->io_cmd_in_list = false;
  65                 list_del_init(&cmd->io_cmd);
  66                 qedi_conn->active_cmd_count--;
  67         } else {
  68                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  69                           "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
  70                           cmd->task_id, qedi_conn->iscsi_conn_id,
  71                           &cmd->io_cmd);
  72         }
  73         spin_unlock(&qedi_conn->list_lock);
  74
  75         cmd->state = RESPONSE_RECEIVED;
  76         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
  77
  78         spin_unlock(&session->back_lock);
  79 }
  80
  81 static void qedi_process_text_resp(struct qedi_ctx *qedi,
  82                                    union iscsi_cqe *cqe,
  83                                    struct iscsi_task *task,
  84                                    struct qedi_conn *qedi_conn)
  85 {
  86         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
  87         struct iscsi_session *session = conn->session;
  88         struct e4_iscsi_task_context *task_ctx;
  89         struct iscsi_text_rsp *resp_hdr_ptr;
  90         struct iscsi_text_response_hdr *cqe_text_response;
  91         struct qedi_cmd *cmd;
  92         int pld_len;
  93
  94         cmd = (struct qedi_cmd *)task->dd_data;
  95         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
  96
  97         cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
  98         spin_lock(&session->back_lock);
  99         resp_hdr_ptr =  (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
 100         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
 101         resp_hdr_ptr->opcode = cqe_text_response->opcode;
 102         resp_hdr_ptr->flags = cqe_text_response->flags;
 103         resp_hdr_ptr->hlength = 0;
 104
 105         hton24(resp_hdr_ptr->dlength,
 106                (cqe_text_response->hdr_second_dword &
 107                 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 108
 109         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 110                                       conn->session->age);
 111         resp_hdr_ptr->ttt = cqe_text_response->ttt;
 112         resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
 113         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
 114         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
 115
 116         pld_len = cqe_text_response->hdr_second_dword &
 117                   ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 118         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 119
 120         memset(task_ctx, '\0', sizeof(*task_ctx));
 121
 122         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 123                   "Freeing tid=0x%x for cid=0x%x\n",
 124                   cmd->task_id, qedi_conn->iscsi_conn_id);
 125
 126         spin_lock(&qedi_conn->list_lock);
 127         if (likely(cmd->io_cmd_in_list)) {
 128                 cmd->io_cmd_in_list = false;
 129                 list_del_init(&cmd->io_cmd);
 130                 qedi_conn->active_cmd_count--;
 131         } else {
 132                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 133                           "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
 134                           cmd->task_id, qedi_conn->iscsi_conn_id,
 135                           &cmd->io_cmd);
 136         }
 137         spin_unlock(&qedi_conn->list_lock);
 138
 139         cmd->state = RESPONSE_RECEIVED;
 140
 141         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 142                              qedi_conn->gen_pdu.resp_buf,
 143                              (qedi_conn->gen_pdu.resp_wr_ptr -
 144                               qedi_conn->gen_pdu.resp_buf));
 145         spin_unlock(&session->back_lock);
 146 }
 147
 148 static void qedi_tmf_resp_work(struct work_struct *work)
 149 {
 150         struct qedi_cmd *qedi_cmd =
 151                                 container_of(work, struct qedi_cmd, tmf_work);
 152         struct qedi_conn *qedi_conn = qedi_cmd->conn;
 153         struct qedi_ctx *qedi = qedi_conn->qedi;
 154         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 155         struct iscsi_session *session = conn->session;
 156         struct iscsi_tm_rsp *resp_hdr_ptr;
 157         int rval = 0;
 158
 159         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 160         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 161
 162         rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
 163         if (rval)
 164                 goto exit_tmf_resp;
 165
 166         spin_lock(&session->back_lock);
 167         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 168         spin_unlock(&session->back_lock);
 169
 170 exit_tmf_resp:
 171         kfree(resp_hdr_ptr);
 172         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 173 }
 174
 175 static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
 176                                   union iscsi_cqe *cqe,
 177                                   struct iscsi_task *task,
 178                                   struct qedi_conn *qedi_conn)
 179
 180 {
 181         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 182         struct iscsi_session *session = conn->session;
 183         struct iscsi_tmf_response_hdr *cqe_tmp_response;
 184         struct iscsi_tm_rsp *resp_hdr_ptr;
 185         struct iscsi_tm *tmf_hdr;
 186         struct qedi_cmd *qedi_cmd = NULL;
 187
 188         cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
 189
 190         qedi_cmd = task->dd_data;
 191         qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_ATOMIC);
 192         if (!qedi_cmd->tmf_resp_buf) {
 193                 QEDI_ERR(&qedi->dbg_ctx,
 194                          "Failed to allocate resp buf, cid=0x%x\n",
 195                           qedi_conn->iscsi_conn_id);
 196                 return;
 197         }
 198
 199         spin_lock(&session->back_lock);
 200         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 201         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
 202
 203         /* Fill up the header */
 204         resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
 205         resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
 206         resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
 207         resp_hdr_ptr->hlength = 0;
 208
 209         hton24(resp_hdr_ptr->dlength,
 210                (cqe_tmp_response->hdr_second_dword &
 211                 ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 212         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 213                                       conn->session->age);
 214         resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
 215         resp_hdr_ptr->exp_cmdsn  = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
 216         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
 217
 218         tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
 219
 220         spin_lock(&qedi_conn->list_lock);
 221         if (likely(qedi_cmd->io_cmd_in_list)) {
 222                 qedi_cmd->io_cmd_in_list = false;
 223                 list_del_init(&qedi_cmd->io_cmd);
 224                 qedi_conn->active_cmd_count--;
 225         }
 226         spin_unlock(&qedi_conn->list_lock);
 227
 228         if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 229               ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
 230             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 231               ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
 232             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 233               ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
 234                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
 235                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
 236                 goto unblock_sess;
 237         }
 238
 239         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 240         kfree(resp_hdr_ptr);
 241
 242 unblock_sess:
 243         spin_unlock(&session->back_lock);
 244 }
 245
 246 static void qedi_process_login_resp(struct qedi_ctx *qedi,
 247                                     union iscsi_cqe *cqe,
 248                                     struct iscsi_task *task,
 249                                     struct qedi_conn *qedi_conn)
 250 {
 251         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 252         struct iscsi_session *session = conn->session;
 253         struct e4_iscsi_task_context *task_ctx;
 254         struct iscsi_login_rsp *resp_hdr_ptr;
 255         struct iscsi_login_response_hdr *cqe_login_response;
 256         struct qedi_cmd *cmd;
 257         int pld_len;
 258
 259         cmd = (struct qedi_cmd *)task->dd_data;
 260
 261         cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
 262         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
 263
 264         spin_lock(&session->back_lock);
 265         resp_hdr_ptr =  (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
 266         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
 267         resp_hdr_ptr->opcode = cqe_login_response->opcode;
 268         resp_hdr_ptr->flags = cqe_login_response->flags_attr;
 269         resp_hdr_ptr->hlength = 0;
 270
 271         hton24(resp_hdr_ptr->dlength,
 272                (cqe_login_response->hdr_second_dword &
 273                 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 274         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 275                                       conn->session->age);
 276         resp_hdr_ptr->tsih = cqe_login_response->tsih;
 277         resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
 278         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
 279         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
 280         resp_hdr_ptr->status_class = cqe_login_response->status_class;
 281         resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
 282         pld_len = cqe_login_response->hdr_second_dword &
 283                   ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 284         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 285
 286         spin_lock(&qedi_conn->list_lock);
 287         if (likely(cmd->io_cmd_in_list)) {
 288                 cmd->io_cmd_in_list = false;
 289                 list_del_init(&cmd->io_cmd);
 290                 qedi_conn->active_cmd_count--;
 291         }
 292         spin_unlock(&qedi_conn->list_lock);
 293
 294         memset(task_ctx, '\0', sizeof(*task_ctx));
 295
 296         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 297                              qedi_conn->gen_pdu.resp_buf,
 298                              (qedi_conn->gen_pdu.resp_wr_ptr -
 299                              qedi_conn->gen_pdu.resp_buf));
 300
 301         spin_unlock(&session->back_lock);
 302         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 303                   "Freeing tid=0x%x for cid=0x%x\n",
 304                   cmd->task_id, qedi_conn->iscsi_conn_id);
 305         cmd->state = RESPONSE_RECEIVED;
 306 }
 307
 308 static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
 309                                 struct iscsi_cqe_unsolicited *cqe,
 310                                 char *ptr, int len)
 311 {
 312         u16 idx = 0;
 313
 314         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 315                   "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
 316                   len, qedi->bdq_prod_idx,
 317                   (qedi->bdq_prod_idx % qedi->rq_num_entries));
 318
 319         /* Obtain buffer address from rqe_opaque */
 320         idx = cqe->rqe_opaque;
 321         if (idx > (QEDI_BDQ_NUM - 1)) {
 322                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 323                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 324                           idx);
 325                 return;
 326         }
 327
 328         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 329                   "rqe_opaque [0x%p], idx [%d]\n", cqe->rqe_opaque, idx);
 330
 331         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 332                   "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
 333         switch (cqe->unsol_cqe_type) {
 334         case ISCSI_CQE_UNSOLICITED_SINGLE:
 335         case ISCSI_CQE_UNSOLICITED_FIRST:
 336                 if (len)
 337                         memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
 338                 break;
 339         case ISCSI_CQE_UNSOLICITED_MIDDLE:
 340         case ISCSI_CQE_UNSOLICITED_LAST:
 341                 break;
 342         default:
 343                 break;
 344         }
 345 }
 346
 347 static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
 348                                 struct iscsi_cqe_unsolicited *cqe,
 349                                 int count)
 350 {
 351         u16 idx = 0;
 352         struct scsi_bd *pbl;
 353
 354         /* Obtain buffer address from rqe_opaque */
 355         idx = cqe->rqe_opaque;
 356         if (idx > (QEDI_BDQ_NUM - 1)) {
 357                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 358                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 359                           idx);
 360                 return;
 361         }
 362
 363         pbl = (struct scsi_bd *)qedi->bdq_pbl;
 364         pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
 365         pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
 366         pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
 367         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 368                   "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
 369                   pbl, pbl->address.hi, pbl->address.lo, idx);
 370         pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
 371         pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
 372         pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
 373         pbl->opaque.iscsi_opaque.opaque = cpu_to_le32(idx);
 374
 375         /* Increment producer to let f/w know we've handled the frame */
 376         qedi->bdq_prod_idx += count;
 377
 378         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
 379         readw(qedi->bdq_primary_prod);
 380
 381         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
 382         readw(qedi->bdq_secondary_prod);
 383 }
 384
 385 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
 386                                       struct iscsi_cqe_unsolicited *cqe,
 387                                       u32 pdu_len, u32 num_bdqs,
 388                                       char *bdq_data)
 389 {
 390         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 391                   "num_bdqs [%d]\n", num_bdqs);
 392
 393         qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
 394         qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
 395 }
 396
 397 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
 398                                    union iscsi_cqe *cqe,
 399                                    struct iscsi_task *task,
 400                                    struct qedi_conn *qedi_conn, u16 que_idx)
 401 {
 402         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 403         struct iscsi_session *session = conn->session;
 404         struct iscsi_nop_in_hdr *cqe_nop_in;
 405         struct iscsi_nopin *hdr;
 406         struct qedi_cmd *cmd;
 407         int tgt_async_nop = 0;
 408         u32 lun[2];
 409         u32 pdu_len, num_bdqs;
 410         char bdq_data[QEDI_BDQ_BUF_SIZE];
 411         unsigned long flags;
 412
 413         spin_lock_bh(&session->back_lock);
 414         cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
 415
 416         pdu_len = cqe_nop_in->hdr_second_dword &
 417                   ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
 418         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 419
 420         hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
 421         memset(hdr, 0, sizeof(struct iscsi_hdr));
 422         hdr->opcode = cqe_nop_in->opcode;
 423         hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
 424         hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
 425         hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
 426         hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
 427
 428         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 429                 spin_lock_irqsave(&qedi->hba_lock, flags);
 430                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 431                                           pdu_len, num_bdqs, bdq_data);
 432                 hdr->itt = RESERVED_ITT;
 433                 tgt_async_nop = 1;
 434                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 435                 goto done;
 436         }
 437
 438         /* Response to one of our nop-outs */
 439         if (task) {
 440                 cmd = task->dd_data;
 441                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
 442                 hdr->itt = build_itt(cqe->cqe_solicited.itid,
 443                                      conn->session->age);
 444                 lun[0] = 0xffffffff;
 445                 lun[1] = 0xffffffff;
 446                 memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
 447                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 448                           "Freeing tid=0x%x for cid=0x%x\n",
 449                           cmd->task_id, qedi_conn->iscsi_conn_id);
 450                 cmd->state = RESPONSE_RECEIVED;
 451                 spin_lock(&qedi_conn->list_lock);
 452                 if (likely(cmd->io_cmd_in_list)) {
 453                         cmd->io_cmd_in_list = false;
 454                         list_del_init(&cmd->io_cmd);
 455                         qedi_conn->active_cmd_count--;
 456                 }
 457
 458                 spin_unlock(&qedi_conn->list_lock);
 459         }
 460
 461 done:
 462         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
 463
 464         spin_unlock_bh(&session->back_lock);
 465         return tgt_async_nop;
 466 }
 467
 468 static void qedi_process_async_mesg(struct qedi_ctx *qedi,
 469                                     union iscsi_cqe *cqe,
 470                                     struct iscsi_task *task,
 471                                     struct qedi_conn *qedi_conn,
 472                                     u16 que_idx)
 473 {
 474         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 475         struct iscsi_session *session = conn->session;
 476         struct iscsi_async_msg_hdr *cqe_async_msg;
 477         struct iscsi_async *resp_hdr;
 478         u32 lun[2];
 479         u32 pdu_len, num_bdqs;
 480         char bdq_data[QEDI_BDQ_BUF_SIZE];
 481         unsigned long flags;
 482
 483         spin_lock_bh(&session->back_lock);
 484
 485         cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
 486         pdu_len = cqe_async_msg->hdr_second_dword &
 487                 ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
 488         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 489
 490         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 491                 spin_lock_irqsave(&qedi->hba_lock, flags);
 492                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 493                                           pdu_len, num_bdqs, bdq_data);
 494                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 495         }
 496
 497         resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
 498         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
 499         resp_hdr->opcode = cqe_async_msg->opcode;
 500         resp_hdr->flags = 0x80;
 501
 502         lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
 503         lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
 504         memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
 505         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
 506         resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
 507         resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
 508
 509         resp_hdr->async_event = cqe_async_msg->async_event;
 510         resp_hdr->async_vcode = cqe_async_msg->async_vcode;
 511
 512         resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
 513         resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
 514         resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
 515
 516         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
 517                              pdu_len);
 518
 519         spin_unlock_bh(&session->back_lock);
 520 }
 521
 522 static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
 523                                      union iscsi_cqe *cqe,
 524                                      struct iscsi_task *task,
 525                                      struct qedi_conn *qedi_conn,
 526                                      uint16_t que_idx)
 527 {
 528         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 529         struct iscsi_session *session = conn->session;
 530         struct iscsi_reject_hdr *cqe_reject;
 531         struct iscsi_reject *hdr;
 532         u32 pld_len, num_bdqs;
 533         unsigned long flags;
 534
 535         spin_lock_bh(&session->back_lock);
 536         cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
 537         pld_len = cqe_reject->hdr_second_dword &
 538                   ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
 539         num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
 540
 541         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 542                 spin_lock_irqsave(&qedi->hba_lock, flags);
 543                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 544                                           pld_len, num_bdqs, conn->data);
 545                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 546         }
 547         hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
 548         memset(hdr, 0, sizeof(struct iscsi_hdr));
 549         hdr->opcode = cqe_reject->opcode;
 550         hdr->reason = cqe_reject->hdr_reason;
 551         hdr->flags = cqe_reject->hdr_flags;
 552         hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
 553                               ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
 554         hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
 555         hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
 556         hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
 557         hdr->ffffffff = cpu_to_be32(0xffffffff);
 558
 559         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 560                              conn->data, pld_len);
 561         spin_unlock_bh(&session->back_lock);
 562 }
 563
 564 static void qedi_scsi_completion(struct qedi_ctx *qedi,
 565                                  union iscsi_cqe *cqe,
 566                                  struct iscsi_task *task,
 567                                  struct iscsi_conn *conn)
 568 {
 569         struct scsi_cmnd *sc_cmd;
 570         struct qedi_cmd *cmd = task->dd_data;
 571         struct iscsi_session *session = conn->session;
 572         struct iscsi_scsi_rsp *hdr;
 573         struct iscsi_data_in_hdr *cqe_data_in;
 574         int datalen = 0;
 575         struct qedi_conn *qedi_conn;
 576         u32 iscsi_cid;
 577         u8 cqe_err_bits = 0;
 578
 579         iscsi_cid  = cqe->cqe_common.conn_id;
 580         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 581
 582         cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
 583         cqe_err_bits =
 584                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 585
 586         spin_lock_bh(&session->back_lock);
 587         /* get the scsi command */
 588         sc_cmd = cmd->scsi_cmd;
 589
 590         if (!sc_cmd) {
 591                 QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
 592                 goto error;
 593         }
 594
 595         if (!sc_cmd->SCp.ptr) {
 596                 QEDI_WARN(&qedi->dbg_ctx,
 597                           "SCp.ptr is NULL, returned in another context.\n");
 598                 goto error;
 599         }
 600
 601         if (!sc_cmd->request) {
 602                 QEDI_WARN(&qedi->dbg_ctx,
 603                           "sc_cmd->request is NULL, sc_cmd=%p.\n",
 604                           sc_cmd);
 605                 goto error;
 606         }
 607
 608         if (!sc_cmd->request->q) {
 609                 QEDI_WARN(&qedi->dbg_ctx,
 610                           "request->q is NULL so request is not valid, sc_cmd=%p.\n",
 611                           sc_cmd);
 612                 goto error;
 613         }
 614
 615         qedi_iscsi_unmap_sg_list(cmd);
 616
 617         hdr = (struct iscsi_scsi_rsp *)task->hdr;
 618         hdr->opcode = cqe_data_in->opcode;
 619         hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
 620         hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
 621         hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
 622         hdr->response = cqe_data_in->reserved1;
 623         hdr->cmd_status = cqe_data_in->status_rsvd;
 624         hdr->flags = cqe_data_in->flags;
 625         hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
 626
 627         if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
 628                 datalen = cqe_data_in->reserved2 &
 629                           ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
 630                 memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
 631         }
 632
 633         /* If f/w reports data underrun err then set residual to IO transfer
 634          * length, set Underrun flag and clear Overrun flag explicitly
 635          */
 636         if (unlikely(cqe_err_bits &&
 637                      GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
 638                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 639                           "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
 640                           hdr->itt, cqe_data_in->flags, cmd->task_id,
 641                           qedi_conn->iscsi_conn_id, hdr->residual_count,
 642                           scsi_bufflen(sc_cmd));
 643                 hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
 644                 hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
 645                 hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
 646         }
 647
 648         spin_lock(&qedi_conn->list_lock);
 649         if (likely(cmd->io_cmd_in_list)) {
 650                 cmd->io_cmd_in_list = false;
 651                 list_del_init(&cmd->io_cmd);
 652                 qedi_conn->active_cmd_count--;
 653         }
 654         spin_unlock(&qedi_conn->list_lock);
 655
 656         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 657                   "Freeing tid=0x%x for cid=0x%x\n",
 658                   cmd->task_id, qedi_conn->iscsi_conn_id);
 659         cmd->state = RESPONSE_RECEIVED;
 660         if (qedi_io_tracing)
 661                 qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
 662
 663         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 664                              conn->data, datalen);
 665 error:
 666         spin_unlock_bh(&session->back_lock);
 667 }
 668
 669 static void qedi_mtask_completion(struct qedi_ctx *qedi,
 670                                   union iscsi_cqe *cqe,
 671                                   struct iscsi_task *task,
 672                                   struct qedi_conn *conn, uint16_t que_idx)
 673 {
 674         struct iscsi_conn *iscsi_conn;
 675         u32 hdr_opcode;
 676
 677         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 678         iscsi_conn = conn->cls_conn->dd_data;
 679
 680         switch (hdr_opcode) {
 681         case ISCSI_OPCODE_SCSI_RESPONSE:
 682         case ISCSI_OPCODE_DATA_IN:
 683                 qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
 684                 break;
 685         case ISCSI_OPCODE_LOGIN_RESPONSE:
 686                 qedi_process_login_resp(qedi, cqe, task, conn);
 687                 break;
 688         case ISCSI_OPCODE_TMF_RESPONSE:
 689                 qedi_process_tmf_resp(qedi, cqe, task, conn);
 690                 break;
 691         case ISCSI_OPCODE_TEXT_RESPONSE:
 692                 qedi_process_text_resp(qedi, cqe, task, conn);
 693                 break;
 694         case ISCSI_OPCODE_LOGOUT_RESPONSE:
 695                 qedi_process_logout_resp(qedi, cqe, task, conn);
 696                 break;
 697         case ISCSI_OPCODE_NOP_IN:
 698                 qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
 699                 break;
 700         default:
 701                 QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
 702         }
 703 }
 704
 705 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
 706                                           struct iscsi_cqe_solicited *cqe,
 707                                           struct iscsi_task *task,
 708                                           struct qedi_conn *qedi_conn)
 709 {
 710         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 711         struct iscsi_session *session = conn->session;
 712         struct qedi_cmd *cmd = task->dd_data;
 713
 714         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
 715                   "itid=0x%x, cmd task id=0x%x\n",
 716                   cqe->itid, cmd->task_id);
 717
 718         cmd->state = RESPONSE_RECEIVED;
 719
 720         spin_lock_bh(&session->back_lock);
 721         __iscsi_put_task(task);
 722         spin_unlock_bh(&session->back_lock);
 723 }
 724
 725 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
 726                                           struct iscsi_cqe_solicited *cqe,
 727                                           struct iscsi_task *task,
 728                                           struct iscsi_conn *conn)
 729 {
 730         struct qedi_work_map *work, *work_tmp;
 731         u32 proto_itt = cqe->itid;
 732         u32 ptmp_itt = 0;
 733         itt_t protoitt = 0;
 734         int found = 0;
 735         struct qedi_cmd *qedi_cmd = NULL;
 736         u32 iscsi_cid;
 737         struct qedi_conn *qedi_conn;
 738         struct qedi_cmd *dbg_cmd;
 739         struct iscsi_task *mtask;
 740         struct iscsi_tm *tmf_hdr = NULL;
 741
 742         iscsi_cid = cqe->conn_id;
 743         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 744         if (!qedi_conn) {
 745                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 746                           "icid not found 0x%x\n", cqe->conn_id);
 747                 return;
 748         }
 749
 750         /* Based on this itt get the corresponding qedi_cmd */
 751         spin_lock_bh(&qedi_conn->tmf_work_lock);
 752         list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
 753                                  list) {
 754                 if (work->rtid == proto_itt) {
 755                         /* We found the command */
 756                         qedi_cmd = work->qedi_cmd;
 757                         if (!qedi_cmd->list_tmf_work) {
 758                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 759                                           "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
 760                                           proto_itt, qedi_conn->iscsi_conn_id);
 761                                 WARN_ON(1);
 762                         }
 763                         found = 1;
 764                         mtask = qedi_cmd->task;
 765                         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
 766
 767                         list_del_init(&work->list);
 768                         kfree(work);
 769                         qedi_cmd->list_tmf_work = NULL;
 770                 }
 771         }
 772         spin_unlock_bh(&qedi_conn->tmf_work_lock);
 773
 774         if (found) {
 775                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 776                           "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
 777                           proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
 778
 779                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 780                     ISCSI_TM_FUNC_ABORT_TASK) {
 781                         spin_lock_bh(&conn->session->back_lock);
 782
 783                         protoitt = build_itt(get_itt(tmf_hdr->rtt),
 784                                              conn->session->age);
 785                         task = iscsi_itt_to_task(conn, protoitt);
 786
 787                         spin_unlock_bh(&conn->session->back_lock);
 788
 789                         if (!task) {
 790                                 QEDI_NOTICE(&qedi->dbg_ctx,
 791                                             "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
 792                                             get_itt(tmf_hdr->rtt),
 793                                             qedi_conn->iscsi_conn_id);
 794                                 return;
 795                         }
 796
 797                         dbg_cmd = task->dd_data;
 798
 799                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 800                                   "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
 801                                   get_itt(tmf_hdr->rtt), get_itt(task->itt),
 802                                   dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
 803
 804                         if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
 805                                 qedi_cmd->state = CLEANUP_RECV;
 806
 807                         spin_lock(&qedi_conn->list_lock);
 808                         if (likely(dbg_cmd->io_cmd_in_list)) {
 809                                 dbg_cmd->io_cmd_in_list = false;
 810                                 list_del_init(&dbg_cmd->io_cmd);
 811                                 qedi_conn->active_cmd_count--;
 812                         }
 813                         spin_unlock(&qedi_conn->list_lock);
 814                         qedi_cmd->state = CLEANUP_RECV;
 815                         wake_up_interruptible(&qedi_conn->wait_queue);
 816                 }
 817         } else if (qedi_conn->cmd_cleanup_req > 0) {
 818                 spin_lock_bh(&conn->session->back_lock);
 819                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 820                 protoitt = build_itt(ptmp_itt, conn->session->age);
 821                 task = iscsi_itt_to_task(conn, protoitt);
 822                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 823                           "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
 824                           cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
 825                           qedi_conn->iscsi_conn_id);
 826
 827                 spin_unlock_bh(&conn->session->back_lock);
 828                 if (!task) {
 829                         QEDI_NOTICE(&qedi->dbg_ctx,
 830                                     "task is null, itid=0x%x, cid=0x%x\n",
 831                                     cqe->itid, qedi_conn->iscsi_conn_id);
 832                         return;
 833                 }
 834                 qedi_conn->cmd_cleanup_cmpl++;
 835                 wake_up(&qedi_conn->wait_queue);
 836
 837                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 838                           "Freeing tid=0x%x for cid=0x%x\n",
 839                           cqe->itid, qedi_conn->iscsi_conn_id);
 840
 841         } else {
 842                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 843                 protoitt = build_itt(ptmp_itt, conn->session->age);
 844                 task = iscsi_itt_to_task(conn, protoitt);
 845                 QEDI_ERR(&qedi->dbg_ctx,
 846                          "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
 847                          protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
 848         }
 849 }
 850
 851 void qedi_fp_process_cqes(struct qedi_work *work)
 852 {
 853         struct qedi_ctx *qedi = work->qedi;
 854         union iscsi_cqe *cqe = &work->cqe;
 855         struct iscsi_task *task = NULL;
 856         struct iscsi_nopout *nopout_hdr;
 857         struct qedi_conn *q_conn;
 858         struct iscsi_conn *conn;
 859         struct qedi_cmd *qedi_cmd;
 860         u32 comp_type;
 861         u32 iscsi_cid;
 862         u32 hdr_opcode;
 863         u16 que_idx = work->que_idx;
 864         u8 cqe_err_bits = 0;
 865
 866         comp_type = cqe->cqe_common.cqe_type;
 867         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 868         cqe_err_bits =
 869                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 870
 871         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 872                   "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
 873                   cqe->cqe_common.conn_id, comp_type, hdr_opcode);
 874
 875         if (comp_type >= MAX_ISCSI_CQES_TYPE) {
 876                 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
 877                 return;
 878         }
 879
 880         iscsi_cid  = cqe->cqe_common.conn_id;
 881         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 882         if (!q_conn) {
 883                 QEDI_WARN(&qedi->dbg_ctx,
 884                           "Session no longer exists for cid=0x%x!!\n",
 885                           iscsi_cid);
 886                 return;
 887         }
 888
 889         conn = q_conn->cls_conn->dd_data;
 890
 891         if (unlikely(cqe_err_bits &&
 892                      GET_FIELD(cqe_err_bits,
 893                                CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
 894                 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
 895                 return;
 896         }
 897
 898         switch (comp_type) {
 899         case ISCSI_CQE_TYPE_SOLICITED:
 900         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
 901                 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
 902                 task = qedi_cmd->task;
 903                 if (!task) {
 904                         QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
 905                         return;
 906                 }
 907
 908                 /* Process NOPIN local completion */
 909                 nopout_hdr = (struct iscsi_nopout *)task->hdr;
 910                 if ((nopout_hdr->itt == RESERVED_ITT) &&
 911                     (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
 912                         qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
 913                                                       task, q_conn);
 914                 } else {
 915                         cqe->cqe_solicited.itid =
 916                                                qedi_get_itt(cqe->cqe_solicited);
 917                         /* Process other solicited responses */
 918                         qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
 919                 }
 920                 break;
 921         case ISCSI_CQE_TYPE_UNSOLICITED:
 922                 switch (hdr_opcode) {
 923                 case ISCSI_OPCODE_NOP_IN:
 924                         qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
 925                                                 que_idx);
 926                         break;
 927                 case ISCSI_OPCODE_ASYNC_MSG:
 928                         qedi_process_async_mesg(qedi, cqe, task, q_conn,
 929                                                 que_idx);
 930                         break;
 931                 case ISCSI_OPCODE_REJECT:
 932                         qedi_process_reject_mesg(qedi, cqe, task, q_conn,
 933                                                  que_idx);
 934                         break;
 935                 }
 936                 goto exit_fp_process;
 937         case ISCSI_CQE_TYPE_DUMMY:
 938                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
 939                 goto exit_fp_process;
 940         case ISCSI_CQE_TYPE_TASK_CLEANUP:
 941                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
 942                 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
 943                                               conn);
 944                 goto exit_fp_process;
 945         default:
 946                 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
 947                 break;
 948         }
 949
 950 exit_fp_process:
 951         return;
 952 }
 953
 954 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
 955 {
 956         struct iscsi_db_data dbell = { 0 };
 957
 958         dbell.agg_flags = 0;
 959
 960         dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
 961         dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
 962         dbell.params |=
 963                    DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
 964
 965         dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
 966         writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
 967
 968         /* Make sure fw write idx is coherent, and include both memory barriers
 969          * as a failsafe as for some architectures the call is the same but on
 970          * others they are two different assembly operations.
 971          */
 972         wmb();
 973         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
 974                   "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
 975                   qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
 976                   qedi_conn->iscsi_conn_id);
 977 }
 978
 979 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
 980 {
 981         struct qedi_endpoint *ep;
 982         u16 rval;
 983
 984         ep = qedi_conn->ep;
 985         rval = ep->sq_prod_idx;
 986
 987         /* Increament SQ index */
 988         ep->sq_prod_idx++;
 989         ep->fw_sq_prod_idx++;
 990         if (ep->sq_prod_idx == QEDI_SQ_SIZE)
 991                 ep->sq_prod_idx = 0;
 992
 993         return rval;
 994 }
 995
 996 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
 997                           struct iscsi_task *task)
 998 {
 999         struct iscsi_login_req_hdr login_req_pdu_header;
1000         struct scsi_sgl_task_params tx_sgl_task_params;
1001         struct scsi_sgl_task_params rx_sgl_task_params;
1002         struct iscsi_task_params task_params;
1003         struct e4_iscsi_task_context *fw_task_ctx;
1004         struct qedi_ctx *qedi = qedi_conn->qedi;
1005         struct iscsi_login_req *login_hdr;
1006         struct scsi_sge *resp_sge = NULL;
1007         struct qedi_cmd *qedi_cmd;
1008         struct qedi_endpoint *ep;
1009         s16 tid = 0;
1010         u16 sq_idx = 0;
1011         int rval = 0;
1012
1013         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1014         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1015         ep = qedi_conn->ep;
1016         login_hdr = (struct iscsi_login_req *)task->hdr;
1017
1018         tid = qedi_get_task_idx(qedi);
1019         if (tid == -1)
1020                 return -ENOMEM;
1021
1022         fw_task_ctx =
1023              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1024                                                                tid);
1025         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1026
1027         qedi_cmd->task_id = tid;
1028
1029         memset(&task_params, 0, sizeof(task_params));
1030         memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
1031         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1032         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1033         /* Update header info */
1034         login_req_pdu_header.opcode = login_hdr->opcode;
1035         login_req_pdu_header.version_min = login_hdr->min_version;
1036         login_req_pdu_header.version_max = login_hdr->max_version;
1037         login_req_pdu_header.flags_attr = login_hdr->flags;
1038         login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1039         login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1040
1041         login_req_pdu_header.tsih = login_hdr->tsih;
1042         login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1043
1044         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1045         login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1046         login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1047         login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1048         login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1049         login_req_pdu_header.exp_stat_sn = 0;
1050
1051         /* Fill tx AHS and rx buffer */
1052         tx_sgl_task_params.sgl =
1053                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1054         tx_sgl_task_params.sgl_phys_addr.lo =
1055                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1056         tx_sgl_task_params.sgl_phys_addr.hi =
1057                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1058         tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1059         tx_sgl_task_params.num_sges = 1;
1060
1061         rx_sgl_task_params.sgl =
1062                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1063         rx_sgl_task_params.sgl_phys_addr.lo =
1064                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1065         rx_sgl_task_params.sgl_phys_addr.hi =
1066                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1067         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1068         rx_sgl_task_params.num_sges = 1;
1069
1070         /* Fill fw input params */
1071         task_params.context = fw_task_ctx;
1072         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1073         task_params.itid = tid;
1074         task_params.cq_rss_number = 0;
1075         task_params.tx_io_size = ntoh24(login_hdr->dlength);
1076         task_params.rx_io_size = resp_sge->sge_len;
1077
1078         sq_idx = qedi_get_wqe_idx(qedi_conn);
1079         task_params.sqe = &ep->sq[sq_idx];
1080
1081         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1082         rval = init_initiator_login_request_task(&task_params,
1083                                                  &login_req_pdu_header,
1084                                                  &tx_sgl_task_params,
1085                                                  &rx_sgl_task_params);
1086         if (rval)
1087                 return -1;
1088
1089         spin_lock(&qedi_conn->list_lock);
1090         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1091         qedi_cmd->io_cmd_in_list = true;
1092         qedi_conn->active_cmd_count++;
1093         spin_unlock(&qedi_conn->list_lock);
1094
1095         qedi_ring_doorbell(qedi_conn);
1096         return 0;
1097 }
1098
1099 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1100                            struct iscsi_task *task)
1101 {
1102         struct iscsi_logout_req_hdr logout_pdu_header;
1103         struct scsi_sgl_task_params tx_sgl_task_params;
1104         struct scsi_sgl_task_params rx_sgl_task_params;
1105         struct iscsi_task_params task_params;
1106         struct e4_iscsi_task_context *fw_task_ctx;
1107         struct iscsi_logout *logout_hdr = NULL;
1108         struct qedi_ctx *qedi = qedi_conn->qedi;
1109         struct qedi_cmd *qedi_cmd;
1110         struct qedi_endpoint *ep;
1111         s16 tid = 0;
1112         u16 sq_idx = 0;
1113         int rval = 0;
1114
1115         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1116         logout_hdr = (struct iscsi_logout *)task->hdr;
1117         ep = qedi_conn->ep;
1118
1119         tid = qedi_get_task_idx(qedi);
1120         if (tid == -1)
1121                 return -ENOMEM;
1122
1123         fw_task_ctx =
1124              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1125                                                                tid);
1126         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1127
1128         qedi_cmd->task_id = tid;
1129
1130         memset(&task_params, 0, sizeof(task_params));
1131         memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1132         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1133         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1134
1135         /* Update header info */
1136         logout_pdu_header.opcode = logout_hdr->opcode;
1137         logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1138         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1139         logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1140         logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1141         logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1142         logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1143
1144         /* Fill fw input params */
1145         task_params.context = fw_task_ctx;
1146         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1147         task_params.itid = tid;
1148         task_params.cq_rss_number = 0;
1149         task_params.tx_io_size = 0;
1150         task_params.rx_io_size = 0;
1151
1152         sq_idx = qedi_get_wqe_idx(qedi_conn);
1153         task_params.sqe = &ep->sq[sq_idx];
1154         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1155
1156         rval = init_initiator_logout_request_task(&task_params,
1157                                                   &logout_pdu_header,
1158                                                   NULL, NULL);
1159         if (rval)
1160                 return -1;
1161
1162         spin_lock(&qedi_conn->list_lock);
1163         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1164         qedi_cmd->io_cmd_in_list = true;
1165         qedi_conn->active_cmd_count++;
1166         spin_unlock(&qedi_conn->list_lock);
1167
1168         qedi_ring_doorbell(qedi_conn);
1169         return 0;
1170 }
1171
1172 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1173                         struct iscsi_task *task, bool in_recovery)
1174 {
1175         int rval;
1176         struct iscsi_task *ctask;
1177         struct qedi_cmd *cmd, *cmd_tmp;
1178         struct iscsi_tm *tmf_hdr;
1179         unsigned int lun = 0;
1180         bool lun_reset = false;
1181         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1182         struct iscsi_session *session = conn->session;
1183
1184         /* From recovery, task is NULL or from tmf resp valid task */
1185         if (task) {
1186                 tmf_hdr = (struct iscsi_tm *)task->hdr;
1187
1188                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1189                         ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1190                         lun_reset = true;
1191                         lun = scsilun_to_int(&tmf_hdr->lun);
1192                 }
1193         }
1194
1195         qedi_conn->cmd_cleanup_req = 0;
1196         qedi_conn->cmd_cleanup_cmpl = 0;
1197
1198         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1199                   "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1200                   qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1201                   in_recovery, lun_reset);
1202
1203         if (lun_reset)
1204                 spin_lock_bh(&session->back_lock);
1205
1206         spin_lock(&qedi_conn->list_lock);
1207
1208         list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1209                                  io_cmd) {
1210                 ctask = cmd->task;
1211                 if (ctask == task)
1212                         continue;
1213
1214                 if (lun_reset) {
1215                         if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1216                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1217                                           "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1218                                           cmd->task_id, get_itt(ctask->itt),
1219                                           cmd->scsi_cmd, cmd->scsi_cmd->device,
1220                                           ctask->state, cmd->state,
1221                                           qedi_conn->iscsi_conn_id);
1222                                 if (cmd->scsi_cmd->device->lun != lun)
1223                                         continue;
1224                         }
1225                 }
1226                 qedi_conn->cmd_cleanup_req++;
1227                 qedi_iscsi_cleanup_task(ctask, true);
1228
1229                 cmd->io_cmd_in_list = false;
1230                 list_del_init(&cmd->io_cmd);
1231                 qedi_conn->active_cmd_count--;
1232                 QEDI_WARN(&qedi->dbg_ctx,
1233                           "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1234                           &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1235         }
1236
1237         spin_unlock(&qedi_conn->list_lock);
1238
1239         if (lun_reset)
1240                 spin_unlock_bh(&session->back_lock);
1241
1242         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1243                   "cmd_cleanup_req=%d, cid=0x%x\n",
1244                   qedi_conn->cmd_cleanup_req,
1245                   qedi_conn->iscsi_conn_id);
1246
1247         rval  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1248                                                  ((qedi_conn->cmd_cleanup_req ==
1249                                                  qedi_conn->cmd_cleanup_cmpl) ||
1250                                                  test_bit(QEDI_IN_RECOVERY,
1251                                                           &qedi->flags)),
1252                                                  5 * HZ);
1253         if (rval) {
1254                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1255                           "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1256                           qedi_conn->cmd_cleanup_req,
1257                           qedi_conn->cmd_cleanup_cmpl,
1258                           qedi_conn->iscsi_conn_id);
1259
1260                 return 0;
1261         }
1262
1263         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1264                   "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1265                   qedi_conn->cmd_cleanup_req,
1266                   qedi_conn->cmd_cleanup_cmpl,
1267                   qedi_conn->iscsi_conn_id);
1268
1269         iscsi_host_for_each_session(qedi->shost,
1270                                     qedi_mark_device_missing);
1271         qedi_ops->common->drain(qedi->cdev);
1272
1273         /* Enable IOs for all other sessions except current.*/
1274         if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1275                                               (qedi_conn->cmd_cleanup_req ==
1276                                                qedi_conn->cmd_cleanup_cmpl) ||
1277                                                test_bit(QEDI_IN_RECOVERY,
1278                                                         &qedi->flags),
1279                                               5 * HZ)) {
1280                 iscsi_host_for_each_session(qedi->shost,
1281                                             qedi_mark_device_available);
1282                 return -1;
1283         }
1284
1285         iscsi_host_for_each_session(qedi->shost,
1286                                     qedi_mark_device_available);
1287
1288         return 0;
1289 }
1290
1291 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1292                   struct iscsi_task *task)
1293 {
1294         struct qedi_endpoint *qedi_ep;
1295         int rval;
1296
1297         qedi_ep = qedi_conn->ep;
1298         qedi_conn->cmd_cleanup_req = 0;
1299         qedi_conn->cmd_cleanup_cmpl = 0;
1300
1301         if (!qedi_ep) {
1302                 QEDI_WARN(&qedi->dbg_ctx,
1303                           "Cannot proceed, ep already disconnected, cid=0x%x\n",
1304                           qedi_conn->iscsi_conn_id);
1305                 return;
1306         }
1307
1308         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1309                   "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1310                   qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1311
1312         qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1313
1314         rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1315         if (rval) {
1316                 QEDI_ERR(&qedi->dbg_ctx,
1317                          "fatal error, need hard reset, cid=0x%x\n",
1318                          qedi_conn->iscsi_conn_id);
1319                 WARN_ON(1);
1320         }
1321 }
1322
1323 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1324                                          struct qedi_conn *qedi_conn,
1325                                          struct iscsi_task *task,
1326                                          struct qedi_cmd *qedi_cmd,
1327                                          struct qedi_work_map *list_work)
1328 {
1329         struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1330         int wait;
1331
1332         wait  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1333                                                  ((qedi_cmd->state ==
1334                                                    CLEANUP_RECV) ||
1335                                                  ((qedi_cmd->type == TYPEIO) &&
1336                                                   (cmd->state ==
1337                                                    RESPONSE_RECEIVED))),
1338                                                  5 * HZ);
1339         if (!wait) {
1340                 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1341
1342                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1343                           "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1344                           cmd->task_id, qedi_conn->iscsi_conn_id);
1345
1346                 return -1;
1347         }
1348         return 0;
1349 }
1350
1351 static void qedi_tmf_work(struct work_struct *work)
1352 {
1353         struct qedi_cmd *qedi_cmd =
1354                 container_of(work, struct qedi_cmd, tmf_work);
1355         struct qedi_conn *qedi_conn = qedi_cmd->conn;
1356         struct qedi_ctx *qedi = qedi_conn->qedi;
1357         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1358         struct qedi_work_map *list_work = NULL;
1359         struct iscsi_task *mtask;
1360         struct qedi_cmd *cmd;
1361         struct iscsi_task *ctask;
1362         struct iscsi_tm *tmf_hdr;
1363         s16 rval = 0;
1364         s16 tid = 0;
1365
1366         mtask = qedi_cmd->task;
1367         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1368         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1369
1370         ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1371         if (!ctask || !ctask->sc) {
1372                 QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
1373                 goto abort_ret;
1374         }
1375
1376         cmd = (struct qedi_cmd *)ctask->dd_data;
1377         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1378                   "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1379                   get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1380                   qedi_conn->iscsi_conn_id);
1381
1382         if (qedi_do_not_recover) {
1383                 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1384                          qedi_do_not_recover);
1385                 goto abort_ret;
1386         }
1387
1388         list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
1389         if (!list_work) {
1390                 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1391                 goto abort_ret;
1392         }
1393
1394         qedi_cmd->type = TYPEIO;
1395         list_work->qedi_cmd = qedi_cmd;
1396         list_work->rtid = cmd->task_id;
1397         list_work->state = QEDI_WORK_SCHEDULED;
1398         qedi_cmd->list_tmf_work = list_work;
1399
1400         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1401                   "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1402                   list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1403                   tmf_hdr->flags);
1404
1405         spin_lock_bh(&qedi_conn->tmf_work_lock);
1406         list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1407         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1408
1409         qedi_iscsi_cleanup_task(ctask, false);
1410
1411         rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1412                                              list_work);
1413         if (rval == -1) {
1414                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1415                           "FW cleanup got escalated, cid=0x%x\n",
1416                           qedi_conn->iscsi_conn_id);
1417                 goto ldel_exit;
1418         }
1419
1420         tid = qedi_get_task_idx(qedi);
1421         if (tid == -1) {
1422                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1423                          qedi_conn->iscsi_conn_id);
1424                 goto ldel_exit;
1425         }
1426
1427         qedi_cmd->task_id = tid;
1428         qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1429
1430 abort_ret:
1431         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1432         return;
1433
1434 ldel_exit:
1435         spin_lock_bh(&qedi_conn->tmf_work_lock);
1436         if (qedi_cmd->list_tmf_work) {
1437                 list_del_init(&list_work->list);
1438                 qedi_cmd->list_tmf_work = NULL;
1439                 kfree(list_work);
1440         }
1441         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1442
1443         spin_lock(&qedi_conn->list_lock);
1444         if (likely(cmd->io_cmd_in_list)) {
1445                 cmd->io_cmd_in_list = false;
1446                 list_del_init(&cmd->io_cmd);
1447                 qedi_conn->active_cmd_count--;
1448         }
1449         spin_unlock(&qedi_conn->list_lock);
1450
1451         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1452 }
1453
1454 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
1455                                struct iscsi_task *mtask)
1456 {
1457         struct iscsi_tmf_request_hdr tmf_pdu_header;
1458         struct iscsi_task_params task_params;
1459         struct qedi_ctx *qedi = qedi_conn->qedi;
1460         struct e4_iscsi_task_context *fw_task_ctx;
1461         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1462         struct iscsi_task *ctask;
1463         struct iscsi_tm *tmf_hdr;
1464         struct qedi_cmd *qedi_cmd;
1465         struct qedi_cmd *cmd;
1466         struct qedi_endpoint *ep;
1467         u32 scsi_lun[2];
1468         s16 tid = 0;
1469         u16 sq_idx = 0;
1470         int rval = 0;
1471
1472         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1473         qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1474         ep = qedi_conn->ep;
1475         if (!ep)
1476                 return -ENODEV;
1477
1478         tid = qedi_get_task_idx(qedi);
1479         if (tid == -1)
1480                 return -ENOMEM;
1481
1482         fw_task_ctx =
1483              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1484                                                                tid);
1485         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1486
1487         qedi_cmd->task_id = tid;
1488
1489         memset(&task_params, 0, sizeof(task_params));
1490         memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1491
1492         /* Update header info */
1493         qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1494         tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1495         tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1496
1497         memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1498         tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1499         tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1500
1501         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1502              ISCSI_TM_FUNC_ABORT_TASK) {
1503                 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1504                 if (!ctask || !ctask->sc) {
1505                         QEDI_ERR(&qedi->dbg_ctx,
1506                                  "Could not get reference task\n");
1507                         return 0;
1508                 }
1509                 cmd = (struct qedi_cmd *)ctask->dd_data;
1510                 tmf_pdu_header.rtt =
1511                                 qedi_set_itt(cmd->task_id,
1512                                              get_itt(tmf_hdr->rtt));
1513         } else {
1514                 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1515         }
1516
1517         tmf_pdu_header.opcode = tmf_hdr->opcode;
1518         tmf_pdu_header.function = tmf_hdr->flags;
1519         tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1520         tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1521
1522         /* Fill fw input params */
1523         task_params.context = fw_task_ctx;
1524         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1525         task_params.itid = tid;
1526         task_params.cq_rss_number = 0;
1527         task_params.tx_io_size = 0;
1528         task_params.rx_io_size = 0;
1529
1530         sq_idx = qedi_get_wqe_idx(qedi_conn);
1531         task_params.sqe = &ep->sq[sq_idx];
1532
1533         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1534         rval = init_initiator_tmf_request_task(&task_params,
1535                                                &tmf_pdu_header);
1536         if (rval)
1537                 return -1;
1538
1539         spin_lock(&qedi_conn->list_lock);
1540         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1541         qedi_cmd->io_cmd_in_list = true;
1542         qedi_conn->active_cmd_count++;
1543         spin_unlock(&qedi_conn->list_lock);
1544
1545         qedi_ring_doorbell(qedi_conn);
1546         return 0;
1547 }
1548
1549 int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
1550                           struct iscsi_task *mtask)
1551 {
1552         struct qedi_ctx *qedi = qedi_conn->qedi;
1553         struct iscsi_tm *tmf_hdr;
1554         struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1555         s16 tid = 0;
1556
1557         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1558         qedi_cmd->task = mtask;
1559
1560         /* If abort task then schedule the work and return */
1561         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1562             ISCSI_TM_FUNC_ABORT_TASK) {
1563                 qedi_cmd->state = CLEANUP_WAIT;
1564                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
1565                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1566
1567         } else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1568                     ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
1569                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1570                     ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
1571                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1572                     ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
1573                 tid = qedi_get_task_idx(qedi);
1574                 if (tid == -1) {
1575                         QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1576                                  qedi_conn->iscsi_conn_id);
1577                         return -1;
1578                 }
1579                 qedi_cmd->task_id = tid;
1580
1581                 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1582
1583         } else {
1584                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1585                          qedi_conn->iscsi_conn_id);
1586                 return -1;
1587         }
1588
1589         return 0;
1590 }
1591
1592 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1593                          struct iscsi_task *task)
1594 {
1595         struct iscsi_text_request_hdr text_request_pdu_header;
1596         struct scsi_sgl_task_params tx_sgl_task_params;
1597         struct scsi_sgl_task_params rx_sgl_task_params;
1598         struct iscsi_task_params task_params;
1599         struct e4_iscsi_task_context *fw_task_ctx;
1600         struct qedi_ctx *qedi = qedi_conn->qedi;
1601         struct iscsi_text *text_hdr;
1602         struct scsi_sge *req_sge = NULL;
1603         struct scsi_sge *resp_sge = NULL;
1604         struct qedi_cmd *qedi_cmd;
1605         struct qedi_endpoint *ep;
1606         s16 tid = 0;
1607         u16 sq_idx = 0;
1608         int rval = 0;
1609
1610         req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1611         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1612         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1613         text_hdr = (struct iscsi_text *)task->hdr;
1614         ep = qedi_conn->ep;
1615
1616         tid = qedi_get_task_idx(qedi);
1617         if (tid == -1)
1618                 return -ENOMEM;
1619
1620         fw_task_ctx =
1621              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1622                                                                tid);
1623         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1624
1625         qedi_cmd->task_id = tid;
1626
1627         memset(&task_params, 0, sizeof(task_params));
1628         memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1629         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1630         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1631
1632         /* Update header info */
1633         text_request_pdu_header.opcode = text_hdr->opcode;
1634         text_request_pdu_header.flags_attr = text_hdr->flags;
1635
1636         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1637         text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1638         text_request_pdu_header.ttt = text_hdr->ttt;
1639         text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1640         text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1641         text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1642
1643         /* Fill tx AHS and rx buffer */
1644         tx_sgl_task_params.sgl =
1645                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1646         tx_sgl_task_params.sgl_phys_addr.lo =
1647                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1648         tx_sgl_task_params.sgl_phys_addr.hi =
1649                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1650         tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1651         tx_sgl_task_params.num_sges = 1;
1652
1653         rx_sgl_task_params.sgl =
1654                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1655         rx_sgl_task_params.sgl_phys_addr.lo =
1656                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1657         rx_sgl_task_params.sgl_phys_addr.hi =
1658                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1659         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1660         rx_sgl_task_params.num_sges = 1;
1661
1662         /* Fill fw input params */
1663         task_params.context = fw_task_ctx;
1664         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1665         task_params.itid = tid;
1666         task_params.cq_rss_number = 0;
1667         task_params.tx_io_size = ntoh24(text_hdr->dlength);
1668         task_params.rx_io_size = resp_sge->sge_len;
1669
1670         sq_idx = qedi_get_wqe_idx(qedi_conn);
1671         task_params.sqe = &ep->sq[sq_idx];
1672
1673         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1674         rval = init_initiator_text_request_task(&task_params,
1675                                                 &text_request_pdu_header,
1676                                                 &tx_sgl_task_params,
1677                                                 &rx_sgl_task_params);
1678         if (rval)
1679                 return -1;
1680
1681         spin_lock(&qedi_conn->list_lock);
1682         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1683         qedi_cmd->io_cmd_in_list = true;
1684         qedi_conn->active_cmd_count++;
1685         spin_unlock(&qedi_conn->list_lock);
1686
1687         qedi_ring_doorbell(qedi_conn);
1688         return 0;
1689 }
1690
1691 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1692                            struct iscsi_task *task,
1693                            char *datap, int data_len, int unsol)
1694 {
1695         struct iscsi_nop_out_hdr nop_out_pdu_header;
1696         struct scsi_sgl_task_params tx_sgl_task_params;
1697         struct scsi_sgl_task_params rx_sgl_task_params;
1698         struct iscsi_task_params task_params;
1699         struct qedi_ctx *qedi = qedi_conn->qedi;
1700         struct e4_iscsi_task_context *fw_task_ctx;
1701         struct iscsi_nopout *nopout_hdr;
1702         struct scsi_sge *resp_sge = NULL;
1703         struct qedi_cmd *qedi_cmd;
1704         struct qedi_endpoint *ep;
1705         u32 scsi_lun[2];
1706         s16 tid = 0;
1707         u16 sq_idx = 0;
1708         int rval = 0;
1709
1710         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1711         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1712         nopout_hdr = (struct iscsi_nopout *)task->hdr;
1713         ep = qedi_conn->ep;
1714
1715         tid = qedi_get_task_idx(qedi);
1716         if (tid == -1)
1717                 return -ENOMEM;
1718
1719         fw_task_ctx =
1720              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1721                                                                tid);
1722         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1723
1724         qedi_cmd->task_id = tid;
1725
1726         memset(&task_params, 0, sizeof(task_params));
1727         memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1728         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1729         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1730
1731         /* Update header info */
1732         nop_out_pdu_header.opcode = nopout_hdr->opcode;
1733         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1734         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1735
1736         memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1737         nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1738         nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1739         nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1740         nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1741
1742         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1743
1744         if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1745                 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1746                 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1747         } else {
1748                 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1749                 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1750
1751                 spin_lock(&qedi_conn->list_lock);
1752                 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1753                 qedi_cmd->io_cmd_in_list = true;
1754                 qedi_conn->active_cmd_count++;
1755                 spin_unlock(&qedi_conn->list_lock);
1756         }
1757
1758         /* Fill tx AHS and rx buffer */
1759         if (data_len) {
1760                 tx_sgl_task_params.sgl =
1761                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1762                 tx_sgl_task_params.sgl_phys_addr.lo =
1763                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1764                 tx_sgl_task_params.sgl_phys_addr.hi =
1765                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1766                 tx_sgl_task_params.total_buffer_size = data_len;
1767                 tx_sgl_task_params.num_sges = 1;
1768
1769                 rx_sgl_task_params.sgl =
1770                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1771                 rx_sgl_task_params.sgl_phys_addr.lo =
1772                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1773                 rx_sgl_task_params.sgl_phys_addr.hi =
1774                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1775                 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1776                 rx_sgl_task_params.num_sges = 1;
1777         }
1778
1779         /* Fill fw input params */
1780         task_params.context = fw_task_ctx;
1781         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1782         task_params.itid = tid;
1783         task_params.cq_rss_number = 0;
1784         task_params.tx_io_size = data_len;
1785         task_params.rx_io_size = resp_sge->sge_len;
1786
1787         sq_idx = qedi_get_wqe_idx(qedi_conn);
1788         task_params.sqe = &ep->sq[sq_idx];
1789
1790         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1791         rval = init_initiator_nop_out_task(&task_params,
1792                                            &nop_out_pdu_header,
1793                                            &tx_sgl_task_params,
1794                                            &rx_sgl_task_params);
1795         if (rval)
1796                 return -1;
1797
1798         qedi_ring_doorbell(qedi_conn);
1799         return 0;
1800 }
1801
1802 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1803                          int bd_index)
1804 {
1805         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1806         int frag_size, sg_frags;
1807
1808         sg_frags = 0;
1809
1810         while (sg_len) {
1811                 if (addr % QEDI_PAGE_SIZE)
1812                         frag_size =
1813                                    (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1814                 else
1815                         frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1816                                     (sg_len % QEDI_BD_SPLIT_SZ);
1817
1818                 if (frag_size == 0)
1819                         frag_size = QEDI_BD_SPLIT_SZ;
1820
1821                 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1822                 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1823                 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1824                 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1825                           "split sge %d: addr=%llx, len=%x",
1826                           (bd_index + sg_frags), addr, frag_size);
1827
1828                 addr += (u64)frag_size;
1829                 sg_frags++;
1830                 sg_len -= frag_size;
1831         }
1832         return sg_frags;
1833 }
1834
1835 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1836 {
1837         struct scsi_cmnd *sc = cmd->scsi_cmd;
1838         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1839         struct scatterlist *sg;
1840         int byte_count = 0;
1841         int bd_count = 0;
1842         int sg_count;
1843         int sg_len;
1844         int sg_frags;
1845         u64 addr, end_addr;
1846         int i;
1847
1848         WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1849
1850         sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1851                               scsi_sg_count(sc), sc->sc_data_direction);
1852
1853         /*
1854          * New condition to send single SGE as cached-SGL.
1855          * Single SGE with length less than 64K.
1856          */
1857         sg = scsi_sglist(sc);
1858         if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1859                 sg_len = sg_dma_len(sg);
1860                 addr = (u64)sg_dma_address(sg);
1861
1862                 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1863                 bd[bd_count].sge_addr.hi = (addr >> 32);
1864                 bd[bd_count].sge_len = (u16)sg_len;
1865
1866                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1867                           "single-cached-sgl: bd_count:%d addr=%llx, len=%x",
1868                           sg_count, addr, sg_len);
1869
1870                 return ++bd_count;
1871         }
1872
1873         scsi_for_each_sg(sc, sg, sg_count, i) {
1874                 sg_len = sg_dma_len(sg);
1875                 addr = (u64)sg_dma_address(sg);
1876                 end_addr = (addr + sg_len);
1877
1878                 /*
1879                  * first sg elem in the 'list',
1880                  * check if end addr is page-aligned.
1881                  */
1882                 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1883                         cmd->use_slowpath = true;
1884
1885                 /*
1886                  * last sg elem in the 'list',
1887                  * check if start addr is page-aligned.
1888                  */
1889                 else if ((i == (sg_count - 1)) &&
1890                          (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1891                         cmd->use_slowpath = true;
1892
1893                 /*
1894                  * middle sg elements in list,
1895                  * check if start and end addr is page-aligned
1896                  */
1897                 else if ((i != 0) && (i != (sg_count - 1)) &&
1898                          ((addr % QEDI_PAGE_SIZE) ||
1899                          (end_addr % QEDI_PAGE_SIZE)))
1900                         cmd->use_slowpath = true;
1901
1902                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1903                           i, sg_len);
1904
1905                 if (sg_len > QEDI_BD_SPLIT_SZ) {
1906                         sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1907                 } else {
1908                         sg_frags = 1;
1909                         bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1910                         bd[bd_count].sge_addr.hi = addr >> 32;
1911                         bd[bd_count].sge_len = sg_len;
1912                 }
1913                 byte_count += sg_len;
1914                 bd_count += sg_frags;
1915         }
1916
1917         if (byte_count != scsi_bufflen(sc))
1918                 QEDI_ERR(&qedi->dbg_ctx,
1919                          "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1920                          scsi_bufflen(sc));
1921         else
1922                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1923                           byte_count);
1924
1925         WARN_ON(byte_count != scsi_bufflen(sc));
1926
1927         return bd_count;
1928 }
1929
1930 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1931 {
1932         int bd_count;
1933         struct scsi_cmnd *sc = cmd->scsi_cmd;
1934
1935         if (scsi_sg_count(sc)) {
1936                 bd_count  = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1937                 if (bd_count == 0)
1938                         return;
1939         } else {
1940                 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1941
1942                 bd[0].sge_addr.lo = 0;
1943                 bd[0].sge_addr.hi = 0;
1944                 bd[0].sge_len = 0;
1945                 bd_count = 0;
1946         }
1947         cmd->io_tbl.sge_valid = bd_count;
1948 }
1949
1950 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1951 {
1952         u32 dword;
1953         int lpcnt;
1954         u8 *srcp;
1955
1956         lpcnt = sc->cmd_len / sizeof(dword);
1957         srcp = (u8 *)sc->cmnd;
1958         while (lpcnt--) {
1959                 memcpy(&dword, (const void *)srcp, 4);
1960                 *dstp = cpu_to_be32(dword);
1961                 srcp += 4;
1962                 dstp++;
1963         }
1964         if (sc->cmd_len & 0x3) {
1965                 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1966                 *dstp = cpu_to_be32(dword);
1967         }
1968 }
1969
1970 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
1971                    u16 tid, int8_t direction)
1972 {
1973         struct qedi_io_log *io_log;
1974         struct iscsi_conn *conn = task->conn;
1975         struct qedi_conn *qedi_conn = conn->dd_data;
1976         struct scsi_cmnd *sc_cmd = task->sc;
1977         unsigned long flags;
1978
1979         spin_lock_irqsave(&qedi->io_trace_lock, flags);
1980
1981         io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
1982         io_log->direction = direction;
1983         io_log->task_id = tid;
1984         io_log->cid = qedi_conn->iscsi_conn_id;
1985         io_log->lun = sc_cmd->device->lun;
1986         io_log->op = sc_cmd->cmnd[0];
1987         io_log->lba[0] = sc_cmd->cmnd[2];
1988         io_log->lba[1] = sc_cmd->cmnd[3];
1989         io_log->lba[2] = sc_cmd->cmnd[4];
1990         io_log->lba[3] = sc_cmd->cmnd[5];
1991         io_log->bufflen = scsi_bufflen(sc_cmd);
1992         io_log->sg_count = scsi_sg_count(sc_cmd);
1993         io_log->fast_sgs = qedi->fast_sgls;
1994         io_log->cached_sgs = qedi->cached_sgls;
1995         io_log->slow_sgs = qedi->slow_sgls;
1996         io_log->cached_sge = qedi->use_cached_sge;
1997         io_log->slow_sge = qedi->use_slow_sge;
1998         io_log->fast_sge = qedi->use_fast_sge;
1999         io_log->result = sc_cmd->result;
2000         io_log->jiffies = jiffies;
2001         io_log->blk_req_cpu = smp_processor_id();
2002
2003         if (direction == QEDI_IO_TRACE_REQ) {
2004                 /* For requests we only care about the submission CPU */
2005                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2006                 io_log->intr_cpu = 0;
2007                 io_log->blk_rsp_cpu = 0;
2008         } else if (direction == QEDI_IO_TRACE_RSP) {
2009                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2010                 io_log->intr_cpu = qedi->intr_cpu;
2011                 io_log->blk_rsp_cpu = smp_processor_id();
2012         }
2013
2014         qedi->io_trace_idx++;
2015         if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
2016                 qedi->io_trace_idx = 0;
2017
2018         qedi->use_cached_sge = false;
2019         qedi->use_slow_sge = false;
2020         qedi->use_fast_sge = false;
2021
2022         spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
2023 }
2024
2025 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
2026 {
2027         struct iscsi_conn *conn = task->conn;
2028         struct iscsi_session *session = conn->session;
2029         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
2030         struct qedi_ctx *qedi = iscsi_host_priv(shost);
2031         struct qedi_conn *qedi_conn = conn->dd_data;
2032         struct qedi_cmd *cmd = task->dd_data;
2033         struct scsi_cmnd *sc = task->sc;
2034         struct iscsi_cmd_hdr cmd_pdu_header;
2035         struct scsi_sgl_task_params tx_sgl_task_params;
2036         struct scsi_sgl_task_params rx_sgl_task_params;
2037         struct scsi_sgl_task_params *prx_sgl = NULL;
2038         struct scsi_sgl_task_params *ptx_sgl = NULL;
2039         struct iscsi_task_params task_params;
2040         struct iscsi_conn_params conn_params;
2041         struct scsi_initiator_cmd_params cmd_params;
2042         struct e4_iscsi_task_context *fw_task_ctx;
2043         struct iscsi_cls_conn *cls_conn;
2044         struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
2045         enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
2046         struct qedi_endpoint *ep;
2047         u32 scsi_lun[2];
2048         s16 tid = 0;
2049         u16 sq_idx = 0;
2050         u16 cq_idx;
2051         int rval = 0;
2052
2053         ep = qedi_conn->ep;
2054         cls_conn = qedi_conn->cls_conn;
2055         conn = cls_conn->dd_data;
2056
2057         qedi_iscsi_map_sg_list(cmd);
2058         int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2059
2060         tid = qedi_get_task_idx(qedi);
2061         if (tid == -1)
2062                 return -ENOMEM;
2063
2064         fw_task_ctx =
2065              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2066                                                                tid);
2067         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
2068
2069         cmd->task_id = tid;
2070
2071         memset(&task_params, 0, sizeof(task_params));
2072         memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2073         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2074         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2075         memset(&conn_params, 0, sizeof(conn_params));
2076         memset(&cmd_params, 0, sizeof(cmd_params));
2077
2078         cq_idx = smp_processor_id() % qedi->num_queues;
2079         /* Update header info */
2080         SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2081                   ISCSI_ATTR_SIMPLE);
2082         if (hdr->cdb[0] != TEST_UNIT_READY) {
2083                 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2084                         SET_FIELD(cmd_pdu_header.flags_attr,
2085                                   ISCSI_CMD_HDR_WRITE, 1);
2086                         task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2087                 } else {
2088                         SET_FIELD(cmd_pdu_header.flags_attr,
2089                                   ISCSI_CMD_HDR_READ, 1);
2090                         task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2091                 }
2092         }
2093
2094         cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2095         cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2096
2097         qedi_update_itt_map(qedi, tid, task->itt, cmd);
2098         cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2099         cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2100         cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2101         cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2102         cmd_pdu_header.hdr_first_byte = hdr->opcode;
2103         qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2104
2105         /* Fill tx AHS and rx buffer */
2106         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2107                 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2108                 tx_sgl_task_params.sgl_phys_addr.lo =
2109                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2110                 tx_sgl_task_params.sgl_phys_addr.hi =
2111                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2112                 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2113                 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2114                 if (cmd->use_slowpath)
2115                         tx_sgl_task_params.small_mid_sge = true;
2116         } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2117                 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2118                 rx_sgl_task_params.sgl_phys_addr.lo =
2119                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2120                 rx_sgl_task_params.sgl_phys_addr.hi =
2121                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2122                 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2123                 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2124         }
2125
2126         /* Add conn param */
2127         conn_params.first_burst_length = conn->session->first_burst;
2128         conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2129         conn_params.max_burst_length = conn->session->max_burst;
2130         if (conn->session->initial_r2t_en)
2131                 conn_params.initial_r2t = true;
2132         if (conn->session->imm_data_en)
2133                 conn_params.immediate_data = true;
2134
2135         /* Add cmd params */
2136         cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2137         cmd_params.sense_data_buffer_phys_addr.hi =
2138                                         (u32)((u64)cmd->sense_buffer_dma >> 32);
2139         /* Fill fw input params */
2140         task_params.context = fw_task_ctx;
2141         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2142         task_params.itid = tid;
2143         task_params.cq_rss_number = cq_idx;
2144         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2145                 task_params.tx_io_size = scsi_bufflen(sc);
2146         else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2147                 task_params.rx_io_size = scsi_bufflen(sc);
2148
2149         sq_idx = qedi_get_wqe_idx(qedi_conn);
2150         task_params.sqe = &ep->sq[sq_idx];
2151
2152         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2153                   "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2154                   (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2155                   "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2156                   "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2157                   (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2158                   (u32)(cmd->io_tbl.sge_tbl_dma),
2159                   (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2160
2161         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2162
2163         if (task_params.tx_io_size != 0)
2164                 ptx_sgl = &tx_sgl_task_params;
2165         if (task_params.rx_io_size != 0)
2166                 prx_sgl = &rx_sgl_task_params;
2167
2168         rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2169                                             &cmd_params, &cmd_pdu_header,
2170                                             ptx_sgl, prx_sgl,
2171                                             NULL);
2172         if (rval)
2173                 return -1;
2174
2175         spin_lock(&qedi_conn->list_lock);
2176         list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2177         cmd->io_cmd_in_list = true;
2178         qedi_conn->active_cmd_count++;
2179         spin_unlock(&qedi_conn->list_lock);
2180
2181         qedi_ring_doorbell(qedi_conn);
2182         return 0;
2183 }
2184
2185 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2186 {
2187         struct iscsi_task_params task_params;
2188         struct qedi_endpoint *ep;
2189         struct iscsi_conn *conn = task->conn;
2190         struct qedi_conn *qedi_conn = conn->dd_data;
2191         struct qedi_cmd *cmd = task->dd_data;
2192         u16 sq_idx = 0;
2193         int rval = 0;
2194
2195         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2196                   "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2197                   cmd->task_id, get_itt(task->itt), task->state,
2198                   cmd->state, qedi_conn->iscsi_conn_id);
2199
2200         memset(&task_params, 0, sizeof(task_params));
2201         ep = qedi_conn->ep;
2202
2203         sq_idx = qedi_get_wqe_idx(qedi_conn);
2204
2205         task_params.sqe = &ep->sq[sq_idx];
2206         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2207         task_params.itid = cmd->task_id;
2208
2209         rval = init_cleanup_task(&task_params);
2210         if (rval)
2211                 return rval;
2212
2213         qedi_ring_doorbell(qedi_conn);
2214         return 0;
2215 }