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