drivers/scsi/qedi/qedi_fw.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * QLogic iSCSI Offload Driver
   4  * Copyright (c) 2016 Cavium Inc.
   5  */
   6
   7 #include <linux/blkdev.h>
   8 #include <scsi/scsi_tcq.h>
   9 #include <linux/delay.h>
  10
  11 #include "qedi.h"
  12 #include "qedi_iscsi.h"
  13 #include "qedi_gbl.h"
  14 #include "qedi_fw_iscsi.h"
  15 #include "qedi_fw_scsi.h"
  16
  17 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
  18                                struct iscsi_task *mtask);
  19
  20 void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
  21 {
  22         struct scsi_cmnd *sc = cmd->scsi_cmd;
  23
  24         if (cmd->io_tbl.sge_valid && sc) {
  25                 cmd->io_tbl.sge_valid = 0;
  26                 scsi_dma_unmap(sc);
  27         }
  28 }
  29
  30 static void qedi_process_logout_resp(struct qedi_ctx *qedi,
  31                                      union iscsi_cqe *cqe,
  32                                      struct iscsi_task *task,
  33                                      struct qedi_conn *qedi_conn)
  34 {
  35         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
  36         struct iscsi_logout_rsp *resp_hdr;
  37         struct iscsi_session *session = conn->session;
  38         struct iscsi_logout_response_hdr *cqe_logout_response;
  39         struct qedi_cmd *cmd;
  40
  41         cmd = (struct qedi_cmd *)task->dd_data;
  42         cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
  43         spin_lock(&session->back_lock);
  44         resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
  45         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
  46         resp_hdr->opcode = cqe_logout_response->opcode;
  47         resp_hdr->flags = cqe_logout_response->flags;
  48         resp_hdr->hlength = 0;
  49
  50         resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
  51         resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
  52         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
  53         resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
  54
  55         resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time_2_wait);
  56         resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time_2_retain);
  57
  58         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
  59                   "Freeing tid=0x%x for cid=0x%x\n",
  60                   cmd->task_id, qedi_conn->iscsi_conn_id);
  61
  62         spin_lock(&qedi_conn->list_lock);
  63         if (likely(cmd->io_cmd_in_list)) {
  64                 cmd->io_cmd_in_list = false;
  65                 list_del_init(&cmd->io_cmd);
  66                 qedi_conn->active_cmd_count--;
  67         } else {
  68                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
  69                           "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
  70                           cmd->task_id, qedi_conn->iscsi_conn_id,
  71                           &cmd->io_cmd);
  72         }
  73         spin_unlock(&qedi_conn->list_lock);
  74
  75         cmd->state = RESPONSE_RECEIVED;
  76         qedi_clear_task_idx(qedi, cmd->task_id);
  77         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
  78
  79         spin_unlock(&session->back_lock);
  80 }
  81
  82 static void qedi_process_text_resp(struct qedi_ctx *qedi,
  83                                    union iscsi_cqe *cqe,
  84                                    struct iscsi_task *task,
  85                                    struct qedi_conn *qedi_conn)
  86 {
  87         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
  88         struct iscsi_session *session = conn->session;
  89         struct e4_iscsi_task_context *task_ctx;
  90         struct iscsi_text_rsp *resp_hdr_ptr;
  91         struct iscsi_text_response_hdr *cqe_text_response;
  92         struct qedi_cmd *cmd;
  93         int pld_len;
  94
  95         cmd = (struct qedi_cmd *)task->dd_data;
  96         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
  97
  98         cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
  99         spin_lock(&session->back_lock);
 100         resp_hdr_ptr =  (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
 101         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
 102         resp_hdr_ptr->opcode = cqe_text_response->opcode;
 103         resp_hdr_ptr->flags = cqe_text_response->flags;
 104         resp_hdr_ptr->hlength = 0;
 105
 106         hton24(resp_hdr_ptr->dlength,
 107                (cqe_text_response->hdr_second_dword &
 108                 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 109
 110         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 111                                       conn->session->age);
 112         resp_hdr_ptr->ttt = cqe_text_response->ttt;
 113         resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
 114         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
 115         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
 116
 117         pld_len = cqe_text_response->hdr_second_dword &
 118                   ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 119         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 120
 121         memset(task_ctx, '\0', sizeof(*task_ctx));
 122
 123         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 124                   "Freeing tid=0x%x for cid=0x%x\n",
 125                   cmd->task_id, qedi_conn->iscsi_conn_id);
 126
 127         spin_lock(&qedi_conn->list_lock);
 128         if (likely(cmd->io_cmd_in_list)) {
 129                 cmd->io_cmd_in_list = false;
 130                 list_del_init(&cmd->io_cmd);
 131                 qedi_conn->active_cmd_count--;
 132         } else {
 133                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 134                           "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
 135                           cmd->task_id, qedi_conn->iscsi_conn_id,
 136                           &cmd->io_cmd);
 137         }
 138         spin_unlock(&qedi_conn->list_lock);
 139
 140         cmd->state = RESPONSE_RECEIVED;
 141         qedi_clear_task_idx(qedi, cmd->task_id);
 142
 143         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 144                              qedi_conn->gen_pdu.resp_buf,
 145                              (qedi_conn->gen_pdu.resp_wr_ptr -
 146                               qedi_conn->gen_pdu.resp_buf));
 147         spin_unlock(&session->back_lock);
 148 }
 149
 150 static void qedi_tmf_resp_work(struct work_struct *work)
 151 {
 152         struct qedi_cmd *qedi_cmd =
 153                                 container_of(work, struct qedi_cmd, tmf_work);
 154         struct qedi_conn *qedi_conn = qedi_cmd->conn;
 155         struct qedi_ctx *qedi = qedi_conn->qedi;
 156         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 157         struct iscsi_session *session = conn->session;
 158         struct iscsi_tm_rsp *resp_hdr_ptr;
 159         int rval = 0;
 160
 161         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 162         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 163
 164         iscsi_block_session(session->cls_session);
 165         rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
 166         if (rval) {
 167                 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 168                 iscsi_unblock_session(session->cls_session);
 169                 goto exit_tmf_resp;
 170         }
 171
 172         iscsi_unblock_session(session->cls_session);
 173         qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 174
 175         spin_lock(&session->back_lock);
 176         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 177         spin_unlock(&session->back_lock);
 178
 179 exit_tmf_resp:
 180         kfree(resp_hdr_ptr);
 181         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
 182 }
 183
 184 static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
 185                                   union iscsi_cqe *cqe,
 186                                   struct iscsi_task *task,
 187                                   struct qedi_conn *qedi_conn)
 188
 189 {
 190         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 191         struct iscsi_session *session = conn->session;
 192         struct iscsi_tmf_response_hdr *cqe_tmp_response;
 193         struct iscsi_tm_rsp *resp_hdr_ptr;
 194         struct iscsi_tm *tmf_hdr;
 195         struct qedi_cmd *qedi_cmd = NULL;
 196
 197         cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
 198
 199         qedi_cmd = task->dd_data;
 200         qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_ATOMIC);
 201         if (!qedi_cmd->tmf_resp_buf) {
 202                 QEDI_ERR(&qedi->dbg_ctx,
 203                          "Failed to allocate resp buf, cid=0x%x\n",
 204                           qedi_conn->iscsi_conn_id);
 205                 return;
 206         }
 207
 208         spin_lock(&session->back_lock);
 209         resp_hdr_ptr =  (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
 210         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
 211
 212         /* Fill up the header */
 213         resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
 214         resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
 215         resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
 216         resp_hdr_ptr->hlength = 0;
 217
 218         hton24(resp_hdr_ptr->dlength,
 219                (cqe_tmp_response->hdr_second_dword &
 220                 ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 221         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 222                                       conn->session->age);
 223         resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
 224         resp_hdr_ptr->exp_cmdsn  = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
 225         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
 226
 227         tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
 228
 229         spin_lock(&qedi_conn->list_lock);
 230         if (likely(qedi_cmd->io_cmd_in_list)) {
 231                 qedi_cmd->io_cmd_in_list = false;
 232                 list_del_init(&qedi_cmd->io_cmd);
 233                 qedi_conn->active_cmd_count--;
 234         }
 235         spin_unlock(&qedi_conn->list_lock);
 236
 237         if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 238               ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
 239             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 240               ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
 241             ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 242               ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
 243                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
 244                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
 245                 goto unblock_sess;
 246         }
 247
 248         qedi_clear_task_idx(qedi, qedi_cmd->task_id);
 249
 250         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
 251         kfree(resp_hdr_ptr);
 252
 253 unblock_sess:
 254         spin_unlock(&session->back_lock);
 255 }
 256
 257 static void qedi_process_login_resp(struct qedi_ctx *qedi,
 258                                     union iscsi_cqe *cqe,
 259                                     struct iscsi_task *task,
 260                                     struct qedi_conn *qedi_conn)
 261 {
 262         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 263         struct iscsi_session *session = conn->session;
 264         struct e4_iscsi_task_context *task_ctx;
 265         struct iscsi_login_rsp *resp_hdr_ptr;
 266         struct iscsi_login_response_hdr *cqe_login_response;
 267         struct qedi_cmd *cmd;
 268         int pld_len;
 269
 270         cmd = (struct qedi_cmd *)task->dd_data;
 271
 272         cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
 273         task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
 274
 275         spin_lock(&session->back_lock);
 276         resp_hdr_ptr =  (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
 277         memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
 278         resp_hdr_ptr->opcode = cqe_login_response->opcode;
 279         resp_hdr_ptr->flags = cqe_login_response->flags_attr;
 280         resp_hdr_ptr->hlength = 0;
 281
 282         hton24(resp_hdr_ptr->dlength,
 283                (cqe_login_response->hdr_second_dword &
 284                 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
 285         resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
 286                                       conn->session->age);
 287         resp_hdr_ptr->tsih = cqe_login_response->tsih;
 288         resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
 289         resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
 290         resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
 291         resp_hdr_ptr->status_class = cqe_login_response->status_class;
 292         resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
 293         pld_len = cqe_login_response->hdr_second_dword &
 294                   ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
 295         qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
 296
 297         spin_lock(&qedi_conn->list_lock);
 298         if (likely(cmd->io_cmd_in_list)) {
 299                 cmd->io_cmd_in_list = false;
 300                 list_del_init(&cmd->io_cmd);
 301                 qedi_conn->active_cmd_count--;
 302         }
 303         spin_unlock(&qedi_conn->list_lock);
 304
 305         memset(task_ctx, '\0', sizeof(*task_ctx));
 306
 307         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
 308                              qedi_conn->gen_pdu.resp_buf,
 309                              (qedi_conn->gen_pdu.resp_wr_ptr -
 310                              qedi_conn->gen_pdu.resp_buf));
 311
 312         spin_unlock(&session->back_lock);
 313         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 314                   "Freeing tid=0x%x for cid=0x%x\n",
 315                   cmd->task_id, qedi_conn->iscsi_conn_id);
 316         cmd->state = RESPONSE_RECEIVED;
 317         qedi_clear_task_idx(qedi, cmd->task_id);
 318 }
 319
 320 static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
 321                                 struct iscsi_cqe_unsolicited *cqe,
 322                                 char *ptr, int len)
 323 {
 324         u16 idx = 0;
 325
 326         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 327                   "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
 328                   len, qedi->bdq_prod_idx,
 329                   (qedi->bdq_prod_idx % qedi->rq_num_entries));
 330
 331         /* Obtain buffer address from rqe_opaque */
 332         idx = cqe->rqe_opaque;
 333         if (idx > (QEDI_BDQ_NUM - 1)) {
 334                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 335                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 336                           idx);
 337                 return;
 338         }
 339
 340         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 341                   "rqe_opaque [0x%p], idx [%d]\n", cqe->rqe_opaque, idx);
 342
 343         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 344                   "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
 345         switch (cqe->unsol_cqe_type) {
 346         case ISCSI_CQE_UNSOLICITED_SINGLE:
 347         case ISCSI_CQE_UNSOLICITED_FIRST:
 348                 if (len)
 349                         memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
 350                 break;
 351         case ISCSI_CQE_UNSOLICITED_MIDDLE:
 352         case ISCSI_CQE_UNSOLICITED_LAST:
 353                 break;
 354         default:
 355                 break;
 356         }
 357 }
 358
 359 static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
 360                                 struct iscsi_cqe_unsolicited *cqe,
 361                                 int count)
 362 {
 363         u16 idx = 0;
 364         struct scsi_bd *pbl;
 365
 366         /* Obtain buffer address from rqe_opaque */
 367         idx = cqe->rqe_opaque;
 368         if (idx > (QEDI_BDQ_NUM - 1)) {
 369                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 370                           "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
 371                           idx);
 372                 return;
 373         }
 374
 375         pbl = (struct scsi_bd *)qedi->bdq_pbl;
 376         pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
 377         pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
 378         pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
 379         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 380                   "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
 381                   pbl, pbl->address.hi, pbl->address.lo, idx);
 382         pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
 383         pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
 384         pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
 385         pbl->opaque.iscsi_opaque.opaque = cpu_to_le32(idx);
 386
 387         /* Increment producer to let f/w know we've handled the frame */
 388         qedi->bdq_prod_idx += count;
 389
 390         writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
 391         readw(qedi->bdq_primary_prod);
 392
 393         writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
 394         readw(qedi->bdq_secondary_prod);
 395 }
 396
 397 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
 398                                       struct iscsi_cqe_unsolicited *cqe,
 399                                       u32 pdu_len, u32 num_bdqs,
 400                                       char *bdq_data)
 401 {
 402         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 403                   "num_bdqs [%d]\n", num_bdqs);
 404
 405         qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
 406         qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
 407 }
 408
 409 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
 410                                    union iscsi_cqe *cqe,
 411                                    struct iscsi_task *task,
 412                                    struct qedi_conn *qedi_conn, u16 que_idx)
 413 {
 414         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 415         struct iscsi_session *session = conn->session;
 416         struct iscsi_nop_in_hdr *cqe_nop_in;
 417         struct iscsi_nopin *hdr;
 418         struct qedi_cmd *cmd;
 419         int tgt_async_nop = 0;
 420         u32 lun[2];
 421         u32 pdu_len, num_bdqs;
 422         char bdq_data[QEDI_BDQ_BUF_SIZE];
 423         unsigned long flags;
 424
 425         spin_lock_bh(&session->back_lock);
 426         cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
 427
 428         pdu_len = cqe_nop_in->hdr_second_dword &
 429                   ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
 430         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 431
 432         hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
 433         memset(hdr, 0, sizeof(struct iscsi_hdr));
 434         hdr->opcode = cqe_nop_in->opcode;
 435         hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
 436         hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
 437         hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
 438         hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
 439
 440         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 441                 spin_lock_irqsave(&qedi->hba_lock, flags);
 442                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 443                                           pdu_len, num_bdqs, bdq_data);
 444                 hdr->itt = RESERVED_ITT;
 445                 tgt_async_nop = 1;
 446                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 447                 goto done;
 448         }
 449
 450         /* Response to one of our nop-outs */
 451         if (task) {
 452                 cmd = task->dd_data;
 453                 hdr->flags = ISCSI_FLAG_CMD_FINAL;
 454                 hdr->itt = build_itt(cqe->cqe_solicited.itid,
 455                                      conn->session->age);
 456                 lun[0] = 0xffffffff;
 457                 lun[1] = 0xffffffff;
 458                 memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
 459                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 460                           "Freeing tid=0x%x for cid=0x%x\n",
 461                           cmd->task_id, qedi_conn->iscsi_conn_id);
 462                 cmd->state = RESPONSE_RECEIVED;
 463                 spin_lock(&qedi_conn->list_lock);
 464                 if (likely(cmd->io_cmd_in_list)) {
 465                         cmd->io_cmd_in_list = false;
 466                         list_del_init(&cmd->io_cmd);
 467                         qedi_conn->active_cmd_count--;
 468                 }
 469
 470                 spin_unlock(&qedi_conn->list_lock);
 471                 qedi_clear_task_idx(qedi, cmd->task_id);
 472         }
 473
 474 done:
 475         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
 476
 477         spin_unlock_bh(&session->back_lock);
 478         return tgt_async_nop;
 479 }
 480
 481 static void qedi_process_async_mesg(struct qedi_ctx *qedi,
 482                                     union iscsi_cqe *cqe,
 483                                     struct iscsi_task *task,
 484                                     struct qedi_conn *qedi_conn,
 485                                     u16 que_idx)
 486 {
 487         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 488         struct iscsi_session *session = conn->session;
 489         struct iscsi_async_msg_hdr *cqe_async_msg;
 490         struct iscsi_async *resp_hdr;
 491         u32 lun[2];
 492         u32 pdu_len, num_bdqs;
 493         char bdq_data[QEDI_BDQ_BUF_SIZE];
 494         unsigned long flags;
 495
 496         spin_lock_bh(&session->back_lock);
 497
 498         cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
 499         pdu_len = cqe_async_msg->hdr_second_dword &
 500                 ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
 501         num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
 502
 503         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 504                 spin_lock_irqsave(&qedi->hba_lock, flags);
 505                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 506                                           pdu_len, num_bdqs, bdq_data);
 507                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 508         }
 509
 510         resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
 511         memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
 512         resp_hdr->opcode = cqe_async_msg->opcode;
 513         resp_hdr->flags = 0x80;
 514
 515         lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
 516         lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
 517         memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
 518         resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
 519         resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
 520         resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
 521
 522         resp_hdr->async_event = cqe_async_msg->async_event;
 523         resp_hdr->async_vcode = cqe_async_msg->async_vcode;
 524
 525         resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
 526         resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
 527         resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
 528
 529         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
 530                              pdu_len);
 531
 532         spin_unlock_bh(&session->back_lock);
 533 }
 534
 535 static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
 536                                      union iscsi_cqe *cqe,
 537                                      struct iscsi_task *task,
 538                                      struct qedi_conn *qedi_conn,
 539                                      uint16_t que_idx)
 540 {
 541         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 542         struct iscsi_session *session = conn->session;
 543         struct iscsi_reject_hdr *cqe_reject;
 544         struct iscsi_reject *hdr;
 545         u32 pld_len, num_bdqs;
 546         unsigned long flags;
 547
 548         spin_lock_bh(&session->back_lock);
 549         cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
 550         pld_len = cqe_reject->hdr_second_dword &
 551                   ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
 552         num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
 553
 554         if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
 555                 spin_lock_irqsave(&qedi->hba_lock, flags);
 556                 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
 557                                           pld_len, num_bdqs, conn->data);
 558                 spin_unlock_irqrestore(&qedi->hba_lock, flags);
 559         }
 560         hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
 561         memset(hdr, 0, sizeof(struct iscsi_hdr));
 562         hdr->opcode = cqe_reject->opcode;
 563         hdr->reason = cqe_reject->hdr_reason;
 564         hdr->flags = cqe_reject->hdr_flags;
 565         hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
 566                               ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
 567         hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
 568         hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
 569         hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
 570         hdr->ffffffff = cpu_to_be32(0xffffffff);
 571
 572         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 573                              conn->data, pld_len);
 574         spin_unlock_bh(&session->back_lock);
 575 }
 576
 577 static void qedi_scsi_completion(struct qedi_ctx *qedi,
 578                                  union iscsi_cqe *cqe,
 579                                  struct iscsi_task *task,
 580                                  struct iscsi_conn *conn)
 581 {
 582         struct scsi_cmnd *sc_cmd;
 583         struct qedi_cmd *cmd = task->dd_data;
 584         struct iscsi_session *session = conn->session;
 585         struct iscsi_scsi_rsp *hdr;
 586         struct iscsi_data_in_hdr *cqe_data_in;
 587         int datalen = 0;
 588         struct qedi_conn *qedi_conn;
 589         u32 iscsi_cid;
 590         u8 cqe_err_bits = 0;
 591
 592         iscsi_cid  = cqe->cqe_common.conn_id;
 593         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 594
 595         cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
 596         cqe_err_bits =
 597                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 598
 599         spin_lock_bh(&session->back_lock);
 600         /* get the scsi command */
 601         sc_cmd = cmd->scsi_cmd;
 602
 603         if (!sc_cmd) {
 604                 QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
 605                 goto error;
 606         }
 607
 608         if (!sc_cmd->SCp.ptr) {
 609                 QEDI_WARN(&qedi->dbg_ctx,
 610                           "SCp.ptr is NULL, returned in another context.\n");
 611                 goto error;
 612         }
 613
 614         if (!sc_cmd->request) {
 615                 QEDI_WARN(&qedi->dbg_ctx,
 616                           "sc_cmd->request is NULL, sc_cmd=%p.\n",
 617                           sc_cmd);
 618                 goto error;
 619         }
 620
 621         if (!sc_cmd->request->q) {
 622                 QEDI_WARN(&qedi->dbg_ctx,
 623                           "request->q is NULL so request is not valid, sc_cmd=%p.\n",
 624                           sc_cmd);
 625                 goto error;
 626         }
 627
 628         qedi_iscsi_unmap_sg_list(cmd);
 629
 630         hdr = (struct iscsi_scsi_rsp *)task->hdr;
 631         hdr->opcode = cqe_data_in->opcode;
 632         hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
 633         hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
 634         hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
 635         hdr->response = cqe_data_in->reserved1;
 636         hdr->cmd_status = cqe_data_in->status_rsvd;
 637         hdr->flags = cqe_data_in->flags;
 638         hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
 639
 640         if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
 641                 datalen = cqe_data_in->reserved2 &
 642                           ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
 643                 memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
 644         }
 645
 646         /* If f/w reports data underrun err then set residual to IO transfer
 647          * length, set Underrun flag and clear Overrun flag explicitly
 648          */
 649         if (unlikely(cqe_err_bits &&
 650                      GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
 651                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 652                           "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
 653                           hdr->itt, cqe_data_in->flags, cmd->task_id,
 654                           qedi_conn->iscsi_conn_id, hdr->residual_count,
 655                           scsi_bufflen(sc_cmd));
 656                 hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
 657                 hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
 658                 hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
 659         }
 660
 661         spin_lock(&qedi_conn->list_lock);
 662         if (likely(cmd->io_cmd_in_list)) {
 663                 cmd->io_cmd_in_list = false;
 664                 list_del_init(&cmd->io_cmd);
 665                 qedi_conn->active_cmd_count--;
 666         }
 667         spin_unlock(&qedi_conn->list_lock);
 668
 669         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 670                   "Freeing tid=0x%x for cid=0x%x\n",
 671                   cmd->task_id, qedi_conn->iscsi_conn_id);
 672         cmd->state = RESPONSE_RECEIVED;
 673         if (qedi_io_tracing)
 674                 qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
 675
 676         qedi_clear_task_idx(qedi, cmd->task_id);
 677         __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
 678                              conn->data, datalen);
 679 error:
 680         spin_unlock_bh(&session->back_lock);
 681 }
 682
 683 static void qedi_mtask_completion(struct qedi_ctx *qedi,
 684                                   union iscsi_cqe *cqe,
 685                                   struct iscsi_task *task,
 686                                   struct qedi_conn *conn, uint16_t que_idx)
 687 {
 688         struct iscsi_conn *iscsi_conn;
 689         u32 hdr_opcode;
 690
 691         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 692         iscsi_conn = conn->cls_conn->dd_data;
 693
 694         switch (hdr_opcode) {
 695         case ISCSI_OPCODE_SCSI_RESPONSE:
 696         case ISCSI_OPCODE_DATA_IN:
 697                 qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
 698                 break;
 699         case ISCSI_OPCODE_LOGIN_RESPONSE:
 700                 qedi_process_login_resp(qedi, cqe, task, conn);
 701                 break;
 702         case ISCSI_OPCODE_TMF_RESPONSE:
 703                 qedi_process_tmf_resp(qedi, cqe, task, conn);
 704                 break;
 705         case ISCSI_OPCODE_TEXT_RESPONSE:
 706                 qedi_process_text_resp(qedi, cqe, task, conn);
 707                 break;
 708         case ISCSI_OPCODE_LOGOUT_RESPONSE:
 709                 qedi_process_logout_resp(qedi, cqe, task, conn);
 710                 break;
 711         case ISCSI_OPCODE_NOP_IN:
 712                 qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
 713                 break;
 714         default:
 715                 QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
 716         }
 717 }
 718
 719 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
 720                                           struct iscsi_cqe_solicited *cqe,
 721                                           struct iscsi_task *task,
 722                                           struct qedi_conn *qedi_conn)
 723 {
 724         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
 725         struct iscsi_session *session = conn->session;
 726         struct qedi_cmd *cmd = task->dd_data;
 727
 728         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
 729                   "itid=0x%x, cmd task id=0x%x\n",
 730                   cqe->itid, cmd->task_id);
 731
 732         cmd->state = RESPONSE_RECEIVED;
 733         qedi_clear_task_idx(qedi, cmd->task_id);
 734
 735         spin_lock_bh(&session->back_lock);
 736         __iscsi_put_task(task);
 737         spin_unlock_bh(&session->back_lock);
 738 }
 739
 740 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
 741                                           struct iscsi_cqe_solicited *cqe,
 742                                           struct iscsi_task *task,
 743                                           struct iscsi_conn *conn)
 744 {
 745         struct qedi_work_map *work, *work_tmp;
 746         u32 proto_itt = cqe->itid;
 747         u32 ptmp_itt = 0;
 748         itt_t protoitt = 0;
 749         int found = 0;
 750         struct qedi_cmd *qedi_cmd = NULL;
 751         u32 rtid = 0;
 752         u32 iscsi_cid;
 753         struct qedi_conn *qedi_conn;
 754         struct qedi_cmd *dbg_cmd;
 755         struct iscsi_task *mtask;
 756         struct iscsi_tm *tmf_hdr = NULL;
 757
 758         iscsi_cid = cqe->conn_id;
 759         qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 760         if (!qedi_conn) {
 761                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
 762                           "icid not found 0x%x\n", cqe->conn_id);
 763                 return;
 764         }
 765
 766         /* Based on this itt get the corresponding qedi_cmd */
 767         spin_lock_bh(&qedi_conn->tmf_work_lock);
 768         list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
 769                                  list) {
 770                 if (work->rtid == proto_itt) {
 771                         /* We found the command */
 772                         qedi_cmd = work->qedi_cmd;
 773                         if (!qedi_cmd->list_tmf_work) {
 774                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 775                                           "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
 776                                           proto_itt, qedi_conn->iscsi_conn_id);
 777                                 WARN_ON(1);
 778                         }
 779                         found = 1;
 780                         mtask = qedi_cmd->task;
 781                         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
 782                         rtid = work->rtid;
 783
 784                         list_del_init(&work->list);
 785                         kfree(work);
 786                         qedi_cmd->list_tmf_work = NULL;
 787                 }
 788         }
 789         spin_unlock_bh(&qedi_conn->tmf_work_lock);
 790
 791         if (found) {
 792                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 793                           "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
 794                           proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
 795
 796                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
 797                     ISCSI_TM_FUNC_ABORT_TASK) {
 798                         spin_lock_bh(&conn->session->back_lock);
 799
 800                         protoitt = build_itt(get_itt(tmf_hdr->rtt),
 801                                              conn->session->age);
 802                         task = iscsi_itt_to_task(conn, protoitt);
 803
 804                         spin_unlock_bh(&conn->session->back_lock);
 805
 806                         if (!task) {
 807                                 QEDI_NOTICE(&qedi->dbg_ctx,
 808                                             "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
 809                                             get_itt(tmf_hdr->rtt),
 810                                             qedi_conn->iscsi_conn_id);
 811                                 return;
 812                         }
 813
 814                         dbg_cmd = task->dd_data;
 815
 816                         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 817                                   "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
 818                                   get_itt(tmf_hdr->rtt), get_itt(task->itt),
 819                                   dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
 820
 821                         if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
 822                                 qedi_cmd->state = CLEANUP_RECV;
 823
 824                         qedi_clear_task_idx(qedi_conn->qedi, rtid);
 825
 826                         spin_lock(&qedi_conn->list_lock);
 827                         if (likely(dbg_cmd->io_cmd_in_list)) {
 828                                 dbg_cmd->io_cmd_in_list = false;
 829                                 list_del_init(&dbg_cmd->io_cmd);
 830                                 qedi_conn->active_cmd_count--;
 831                         }
 832                         spin_unlock(&qedi_conn->list_lock);
 833                         qedi_cmd->state = CLEANUP_RECV;
 834                         wake_up_interruptible(&qedi_conn->wait_queue);
 835                 }
 836         } else if (qedi_conn->cmd_cleanup_req > 0) {
 837                 spin_lock_bh(&conn->session->back_lock);
 838                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 839                 protoitt = build_itt(ptmp_itt, conn->session->age);
 840                 task = iscsi_itt_to_task(conn, protoitt);
 841                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
 842                           "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
 843                           cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
 844                           qedi_conn->iscsi_conn_id);
 845
 846                 spin_unlock_bh(&conn->session->back_lock);
 847                 if (!task) {
 848                         QEDI_NOTICE(&qedi->dbg_ctx,
 849                                     "task is null, itid=0x%x, cid=0x%x\n",
 850                                     cqe->itid, qedi_conn->iscsi_conn_id);
 851                         return;
 852                 }
 853                 qedi_conn->cmd_cleanup_cmpl++;
 854                 wake_up(&qedi_conn->wait_queue);
 855
 856                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
 857                           "Freeing tid=0x%x for cid=0x%x\n",
 858                           cqe->itid, qedi_conn->iscsi_conn_id);
 859                 qedi_clear_task_idx(qedi_conn->qedi, cqe->itid);
 860
 861         } else {
 862                 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
 863                 protoitt = build_itt(ptmp_itt, conn->session->age);
 864                 task = iscsi_itt_to_task(conn, protoitt);
 865                 QEDI_ERR(&qedi->dbg_ctx,
 866                          "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
 867                          protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
 868         }
 869 }
 870
 871 void qedi_fp_process_cqes(struct qedi_work *work)
 872 {
 873         struct qedi_ctx *qedi = work->qedi;
 874         union iscsi_cqe *cqe = &work->cqe;
 875         struct iscsi_task *task = NULL;
 876         struct iscsi_nopout *nopout_hdr;
 877         struct qedi_conn *q_conn;
 878         struct iscsi_conn *conn;
 879         struct qedi_cmd *qedi_cmd;
 880         u32 comp_type;
 881         u32 iscsi_cid;
 882         u32 hdr_opcode;
 883         u16 que_idx = work->que_idx;
 884         u8 cqe_err_bits = 0;
 885
 886         comp_type = cqe->cqe_common.cqe_type;
 887         hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
 888         cqe_err_bits =
 889                 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
 890
 891         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
 892                   "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
 893                   cqe->cqe_common.conn_id, comp_type, hdr_opcode);
 894
 895         if (comp_type >= MAX_ISCSI_CQES_TYPE) {
 896                 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
 897                 return;
 898         }
 899
 900         iscsi_cid  = cqe->cqe_common.conn_id;
 901         q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
 902         if (!q_conn) {
 903                 QEDI_WARN(&qedi->dbg_ctx,
 904                           "Session no longer exists for cid=0x%x!!\n",
 905                           iscsi_cid);
 906                 return;
 907         }
 908
 909         conn = q_conn->cls_conn->dd_data;
 910
 911         if (unlikely(cqe_err_bits &&
 912                      GET_FIELD(cqe_err_bits,
 913                                CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
 914                 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
 915                 return;
 916         }
 917
 918         switch (comp_type) {
 919         case ISCSI_CQE_TYPE_SOLICITED:
 920         case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
 921                 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
 922                 task = qedi_cmd->task;
 923                 if (!task) {
 924                         QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
 925                         return;
 926                 }
 927
 928                 /* Process NOPIN local completion */
 929                 nopout_hdr = (struct iscsi_nopout *)task->hdr;
 930                 if ((nopout_hdr->itt == RESERVED_ITT) &&
 931                     (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
 932                         qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
 933                                                       task, q_conn);
 934                 } else {
 935                         cqe->cqe_solicited.itid =
 936                                                qedi_get_itt(cqe->cqe_solicited);
 937                         /* Process other solicited responses */
 938                         qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
 939                 }
 940                 break;
 941         case ISCSI_CQE_TYPE_UNSOLICITED:
 942                 switch (hdr_opcode) {
 943                 case ISCSI_OPCODE_NOP_IN:
 944                         qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
 945                                                 que_idx);
 946                         break;
 947                 case ISCSI_OPCODE_ASYNC_MSG:
 948                         qedi_process_async_mesg(qedi, cqe, task, q_conn,
 949                                                 que_idx);
 950                         break;
 951                 case ISCSI_OPCODE_REJECT:
 952                         qedi_process_reject_mesg(qedi, cqe, task, q_conn,
 953                                                  que_idx);
 954                         break;
 955                 }
 956                 goto exit_fp_process;
 957         case ISCSI_CQE_TYPE_DUMMY:
 958                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
 959                 goto exit_fp_process;
 960         case ISCSI_CQE_TYPE_TASK_CLEANUP:
 961                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
 962                 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
 963                                               conn);
 964                 goto exit_fp_process;
 965         default:
 966                 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
 967                 break;
 968         }
 969
 970 exit_fp_process:
 971         return;
 972 }
 973
 974 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
 975 {
 976         struct iscsi_db_data dbell = { 0 };
 977
 978         dbell.agg_flags = 0;
 979
 980         dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
 981         dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
 982         dbell.params |=
 983                    DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
 984
 985         dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
 986         writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
 987
 988         /* Make sure fw write idx is coherent, and include both memory barriers
 989          * as a failsafe as for some architectures the call is the same but on
 990          * others they are two different assembly operations.
 991          */
 992         wmb();
 993         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
 994                   "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
 995                   qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
 996                   qedi_conn->iscsi_conn_id);
 997 }
 998
 999 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
1000 {
1001         struct qedi_endpoint *ep;
1002         u16 rval;
1003
1004         ep = qedi_conn->ep;
1005         rval = ep->sq_prod_idx;
1006
1007         /* Increament SQ index */
1008         ep->sq_prod_idx++;
1009         ep->fw_sq_prod_idx++;
1010         if (ep->sq_prod_idx == QEDI_SQ_SIZE)
1011                 ep->sq_prod_idx = 0;
1012
1013         return rval;
1014 }
1015
1016 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
1017                           struct iscsi_task *task)
1018 {
1019         struct iscsi_login_req_hdr login_req_pdu_header;
1020         struct scsi_sgl_task_params tx_sgl_task_params;
1021         struct scsi_sgl_task_params rx_sgl_task_params;
1022         struct iscsi_task_params task_params;
1023         struct e4_iscsi_task_context *fw_task_ctx;
1024         struct qedi_ctx *qedi = qedi_conn->qedi;
1025         struct iscsi_login_req *login_hdr;
1026         struct scsi_sge *resp_sge = NULL;
1027         struct qedi_cmd *qedi_cmd;
1028         struct qedi_endpoint *ep;
1029         s16 tid = 0;
1030         u16 sq_idx = 0;
1031         int rval = 0;
1032
1033         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1034         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1035         ep = qedi_conn->ep;
1036         login_hdr = (struct iscsi_login_req *)task->hdr;
1037
1038         tid = qedi_get_task_idx(qedi);
1039         if (tid == -1)
1040                 return -ENOMEM;
1041
1042         fw_task_ctx =
1043              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1044                                                                tid);
1045         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1046
1047         qedi_cmd->task_id = tid;
1048
1049         memset(&task_params, 0, sizeof(task_params));
1050         memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
1051         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1052         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1053         /* Update header info */
1054         login_req_pdu_header.opcode = login_hdr->opcode;
1055         login_req_pdu_header.version_min = login_hdr->min_version;
1056         login_req_pdu_header.version_max = login_hdr->max_version;
1057         login_req_pdu_header.flags_attr = login_hdr->flags;
1058         login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1059         login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1060
1061         login_req_pdu_header.tsih = login_hdr->tsih;
1062         login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1063
1064         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1065         login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1066         login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1067         login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1068         login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1069         login_req_pdu_header.exp_stat_sn = 0;
1070
1071         /* Fill tx AHS and rx buffer */
1072         tx_sgl_task_params.sgl =
1073                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1074         tx_sgl_task_params.sgl_phys_addr.lo =
1075                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1076         tx_sgl_task_params.sgl_phys_addr.hi =
1077                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1078         tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1079         tx_sgl_task_params.num_sges = 1;
1080
1081         rx_sgl_task_params.sgl =
1082                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1083         rx_sgl_task_params.sgl_phys_addr.lo =
1084                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1085         rx_sgl_task_params.sgl_phys_addr.hi =
1086                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1087         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1088         rx_sgl_task_params.num_sges = 1;
1089
1090         /* Fill fw input params */
1091         task_params.context = fw_task_ctx;
1092         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1093         task_params.itid = tid;
1094         task_params.cq_rss_number = 0;
1095         task_params.tx_io_size = ntoh24(login_hdr->dlength);
1096         task_params.rx_io_size = resp_sge->sge_len;
1097
1098         sq_idx = qedi_get_wqe_idx(qedi_conn);
1099         task_params.sqe = &ep->sq[sq_idx];
1100
1101         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1102         rval = init_initiator_login_request_task(&task_params,
1103                                                  &login_req_pdu_header,
1104                                                  &tx_sgl_task_params,
1105                                                  &rx_sgl_task_params);
1106         if (rval)
1107                 return -1;
1108
1109         spin_lock(&qedi_conn->list_lock);
1110         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1111         qedi_cmd->io_cmd_in_list = true;
1112         qedi_conn->active_cmd_count++;
1113         spin_unlock(&qedi_conn->list_lock);
1114
1115         qedi_ring_doorbell(qedi_conn);
1116         return 0;
1117 }
1118
1119 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1120                            struct iscsi_task *task)
1121 {
1122         struct iscsi_logout_req_hdr logout_pdu_header;
1123         struct scsi_sgl_task_params tx_sgl_task_params;
1124         struct scsi_sgl_task_params rx_sgl_task_params;
1125         struct iscsi_task_params task_params;
1126         struct e4_iscsi_task_context *fw_task_ctx;
1127         struct iscsi_logout *logout_hdr = NULL;
1128         struct qedi_ctx *qedi = qedi_conn->qedi;
1129         struct qedi_cmd *qedi_cmd;
1130         struct qedi_endpoint *ep;
1131         s16 tid = 0;
1132         u16 sq_idx = 0;
1133         int rval = 0;
1134
1135         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1136         logout_hdr = (struct iscsi_logout *)task->hdr;
1137         ep = qedi_conn->ep;
1138
1139         tid = qedi_get_task_idx(qedi);
1140         if (tid == -1)
1141                 return -ENOMEM;
1142
1143         fw_task_ctx =
1144              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1145                                                                tid);
1146         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1147
1148         qedi_cmd->task_id = tid;
1149
1150         memset(&task_params, 0, sizeof(task_params));
1151         memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1152         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1153         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1154
1155         /* Update header info */
1156         logout_pdu_header.opcode = logout_hdr->opcode;
1157         logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1158         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1159         logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1160         logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1161         logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1162         logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1163
1164         /* Fill fw input params */
1165         task_params.context = fw_task_ctx;
1166         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1167         task_params.itid = tid;
1168         task_params.cq_rss_number = 0;
1169         task_params.tx_io_size = 0;
1170         task_params.rx_io_size = 0;
1171
1172         sq_idx = qedi_get_wqe_idx(qedi_conn);
1173         task_params.sqe = &ep->sq[sq_idx];
1174         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1175
1176         rval = init_initiator_logout_request_task(&task_params,
1177                                                   &logout_pdu_header,
1178                                                   NULL, NULL);
1179         if (rval)
1180                 return -1;
1181
1182         spin_lock(&qedi_conn->list_lock);
1183         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1184         qedi_cmd->io_cmd_in_list = true;
1185         qedi_conn->active_cmd_count++;
1186         spin_unlock(&qedi_conn->list_lock);
1187
1188         qedi_ring_doorbell(qedi_conn);
1189         return 0;
1190 }
1191
1192 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1193                         struct iscsi_task *task, bool in_recovery)
1194 {
1195         int rval;
1196         struct iscsi_task *ctask;
1197         struct qedi_cmd *cmd, *cmd_tmp;
1198         struct iscsi_tm *tmf_hdr;
1199         unsigned int lun = 0;
1200         bool lun_reset = false;
1201         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1202         struct iscsi_session *session = conn->session;
1203
1204         /* From recovery, task is NULL or from tmf resp valid task */
1205         if (task) {
1206                 tmf_hdr = (struct iscsi_tm *)task->hdr;
1207
1208                 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1209                         ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1210                         lun_reset = true;
1211                         lun = scsilun_to_int(&tmf_hdr->lun);
1212                 }
1213         }
1214
1215         qedi_conn->cmd_cleanup_req = 0;
1216         qedi_conn->cmd_cleanup_cmpl = 0;
1217
1218         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1219                   "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1220                   qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1221                   in_recovery, lun_reset);
1222
1223         if (lun_reset)
1224                 spin_lock_bh(&session->back_lock);
1225
1226         spin_lock(&qedi_conn->list_lock);
1227
1228         list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1229                                  io_cmd) {
1230                 ctask = cmd->task;
1231                 if (ctask == task)
1232                         continue;
1233
1234                 if (lun_reset) {
1235                         if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1236                                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1237                                           "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1238                                           cmd->task_id, get_itt(ctask->itt),
1239                                           cmd->scsi_cmd, cmd->scsi_cmd->device,
1240                                           ctask->state, cmd->state,
1241                                           qedi_conn->iscsi_conn_id);
1242                                 if (cmd->scsi_cmd->device->lun != lun)
1243                                         continue;
1244                         }
1245                 }
1246                 qedi_conn->cmd_cleanup_req++;
1247                 qedi_iscsi_cleanup_task(ctask, true);
1248
1249                 cmd->io_cmd_in_list = false;
1250                 list_del_init(&cmd->io_cmd);
1251                 qedi_conn->active_cmd_count--;
1252                 QEDI_WARN(&qedi->dbg_ctx,
1253                           "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1254                           &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1255         }
1256
1257         spin_unlock(&qedi_conn->list_lock);
1258
1259         if (lun_reset)
1260                 spin_unlock_bh(&session->back_lock);
1261
1262         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1263                   "cmd_cleanup_req=%d, cid=0x%x\n",
1264                   qedi_conn->cmd_cleanup_req,
1265                   qedi_conn->iscsi_conn_id);
1266
1267         rval  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1268                                                  ((qedi_conn->cmd_cleanup_req ==
1269                                                  qedi_conn->cmd_cleanup_cmpl) ||
1270                                                  test_bit(QEDI_IN_RECOVERY,
1271                                                           &qedi->flags)),
1272                                                  5 * HZ);
1273         if (rval) {
1274                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1275                           "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1276                           qedi_conn->cmd_cleanup_req,
1277                           qedi_conn->cmd_cleanup_cmpl,
1278                           qedi_conn->iscsi_conn_id);
1279
1280                 return 0;
1281         }
1282
1283         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1284                   "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1285                   qedi_conn->cmd_cleanup_req,
1286                   qedi_conn->cmd_cleanup_cmpl,
1287                   qedi_conn->iscsi_conn_id);
1288
1289         iscsi_host_for_each_session(qedi->shost,
1290                                     qedi_mark_device_missing);
1291         qedi_ops->common->drain(qedi->cdev);
1292
1293         /* Enable IOs for all other sessions except current.*/
1294         if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1295                                               (qedi_conn->cmd_cleanup_req ==
1296                                                qedi_conn->cmd_cleanup_cmpl) ||
1297                                                test_bit(QEDI_IN_RECOVERY,
1298                                                         &qedi->flags),
1299                                               5 * HZ)) {
1300                 iscsi_host_for_each_session(qedi->shost,
1301                                             qedi_mark_device_available);
1302                 return -1;
1303         }
1304
1305         iscsi_host_for_each_session(qedi->shost,
1306                                     qedi_mark_device_available);
1307
1308         return 0;
1309 }
1310
1311 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1312                   struct iscsi_task *task)
1313 {
1314         struct qedi_endpoint *qedi_ep;
1315         int rval;
1316
1317         qedi_ep = qedi_conn->ep;
1318         qedi_conn->cmd_cleanup_req = 0;
1319         qedi_conn->cmd_cleanup_cmpl = 0;
1320
1321         if (!qedi_ep) {
1322                 QEDI_WARN(&qedi->dbg_ctx,
1323                           "Cannot proceed, ep already disconnected, cid=0x%x\n",
1324                           qedi_conn->iscsi_conn_id);
1325                 return;
1326         }
1327
1328         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1329                   "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1330                   qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1331
1332         qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1333
1334         rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1335         if (rval) {
1336                 QEDI_ERR(&qedi->dbg_ctx,
1337                          "fatal error, need hard reset, cid=0x%x\n",
1338                          qedi_conn->iscsi_conn_id);
1339                 WARN_ON(1);
1340         }
1341 }
1342
1343 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1344                                          struct qedi_conn *qedi_conn,
1345                                          struct iscsi_task *task,
1346                                          struct qedi_cmd *qedi_cmd,
1347                                          struct qedi_work_map *list_work)
1348 {
1349         struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1350         int wait;
1351
1352         wait  = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1353                                                  ((qedi_cmd->state ==
1354                                                    CLEANUP_RECV) ||
1355                                                  ((qedi_cmd->type == TYPEIO) &&
1356                                                   (cmd->state ==
1357                                                    RESPONSE_RECEIVED))),
1358                                                  5 * HZ);
1359         if (!wait) {
1360                 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1361
1362                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1363                           "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1364                           cmd->task_id, qedi_conn->iscsi_conn_id);
1365
1366                 return -1;
1367         }
1368         return 0;
1369 }
1370
1371 static void qedi_tmf_work(struct work_struct *work)
1372 {
1373         struct qedi_cmd *qedi_cmd =
1374                 container_of(work, struct qedi_cmd, tmf_work);
1375         struct qedi_conn *qedi_conn = qedi_cmd->conn;
1376         struct qedi_ctx *qedi = qedi_conn->qedi;
1377         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1378         struct qedi_work_map *list_work = NULL;
1379         struct iscsi_task *mtask;
1380         struct qedi_cmd *cmd;
1381         struct iscsi_task *ctask;
1382         struct iscsi_tm *tmf_hdr;
1383         s16 rval = 0;
1384         s16 tid = 0;
1385
1386         mtask = qedi_cmd->task;
1387         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1388         set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1389
1390         ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1391         if (!ctask || !ctask->sc) {
1392                 QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
1393                 goto abort_ret;
1394         }
1395
1396         cmd = (struct qedi_cmd *)ctask->dd_data;
1397         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1398                   "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1399                   get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1400                   qedi_conn->iscsi_conn_id);
1401
1402         if (qedi_do_not_recover) {
1403                 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1404                          qedi_do_not_recover);
1405                 goto abort_ret;
1406         }
1407
1408         list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
1409         if (!list_work) {
1410                 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1411                 goto abort_ret;
1412         }
1413
1414         qedi_cmd->type = TYPEIO;
1415         list_work->qedi_cmd = qedi_cmd;
1416         list_work->rtid = cmd->task_id;
1417         list_work->state = QEDI_WORK_SCHEDULED;
1418         qedi_cmd->list_tmf_work = list_work;
1419
1420         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1421                   "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1422                   list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1423                   tmf_hdr->flags);
1424
1425         spin_lock_bh(&qedi_conn->tmf_work_lock);
1426         list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1427         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1428
1429         qedi_iscsi_cleanup_task(ctask, false);
1430
1431         rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1432                                              list_work);
1433         if (rval == -1) {
1434                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1435                           "FW cleanup got escalated, cid=0x%x\n",
1436                           qedi_conn->iscsi_conn_id);
1437                 goto ldel_exit;
1438         }
1439
1440         tid = qedi_get_task_idx(qedi);
1441         if (tid == -1) {
1442                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1443                          qedi_conn->iscsi_conn_id);
1444                 goto ldel_exit;
1445         }
1446
1447         qedi_cmd->task_id = tid;
1448         qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1449
1450 abort_ret:
1451         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1452         return;
1453
1454 ldel_exit:
1455         spin_lock_bh(&qedi_conn->tmf_work_lock);
1456         if (!qedi_cmd->list_tmf_work) {
1457                 list_del_init(&list_work->list);
1458                 qedi_cmd->list_tmf_work = NULL;
1459                 kfree(list_work);
1460         }
1461         spin_unlock_bh(&qedi_conn->tmf_work_lock);
1462
1463         spin_lock(&qedi_conn->list_lock);
1464         if (likely(cmd->io_cmd_in_list)) {
1465                 cmd->io_cmd_in_list = false;
1466                 list_del_init(&cmd->io_cmd);
1467                 qedi_conn->active_cmd_count--;
1468         }
1469         spin_unlock(&qedi_conn->list_lock);
1470
1471         clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1472 }
1473
1474 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
1475                                struct iscsi_task *mtask)
1476 {
1477         struct iscsi_tmf_request_hdr tmf_pdu_header;
1478         struct iscsi_task_params task_params;
1479         struct qedi_ctx *qedi = qedi_conn->qedi;
1480         struct e4_iscsi_task_context *fw_task_ctx;
1481         struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1482         struct iscsi_task *ctask;
1483         struct iscsi_tm *tmf_hdr;
1484         struct qedi_cmd *qedi_cmd;
1485         struct qedi_cmd *cmd;
1486         struct qedi_endpoint *ep;
1487         u32 scsi_lun[2];
1488         s16 tid = 0;
1489         u16 sq_idx = 0;
1490         int rval = 0;
1491
1492         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1493         qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1494         ep = qedi_conn->ep;
1495         if (!ep)
1496                 return -ENODEV;
1497
1498         tid = qedi_get_task_idx(qedi);
1499         if (tid == -1)
1500                 return -ENOMEM;
1501
1502         fw_task_ctx =
1503              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1504                                                                tid);
1505         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1506
1507         qedi_cmd->task_id = tid;
1508
1509         memset(&task_params, 0, sizeof(task_params));
1510         memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1511
1512         /* Update header info */
1513         qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1514         tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1515         tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1516
1517         memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1518         tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1519         tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1520
1521         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1522              ISCSI_TM_FUNC_ABORT_TASK) {
1523                 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1524                 if (!ctask || !ctask->sc) {
1525                         QEDI_ERR(&qedi->dbg_ctx,
1526                                  "Could not get reference task\n");
1527                         return 0;
1528                 }
1529                 cmd = (struct qedi_cmd *)ctask->dd_data;
1530                 tmf_pdu_header.rtt =
1531                                 qedi_set_itt(cmd->task_id,
1532                                              get_itt(tmf_hdr->rtt));
1533         } else {
1534                 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1535         }
1536
1537         tmf_pdu_header.opcode = tmf_hdr->opcode;
1538         tmf_pdu_header.function = tmf_hdr->flags;
1539         tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1540         tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1541
1542         /* Fill fw input params */
1543         task_params.context = fw_task_ctx;
1544         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1545         task_params.itid = tid;
1546         task_params.cq_rss_number = 0;
1547         task_params.tx_io_size = 0;
1548         task_params.rx_io_size = 0;
1549
1550         sq_idx = qedi_get_wqe_idx(qedi_conn);
1551         task_params.sqe = &ep->sq[sq_idx];
1552
1553         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1554         rval = init_initiator_tmf_request_task(&task_params,
1555                                                &tmf_pdu_header);
1556         if (rval)
1557                 return -1;
1558
1559         spin_lock(&qedi_conn->list_lock);
1560         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1561         qedi_cmd->io_cmd_in_list = true;
1562         qedi_conn->active_cmd_count++;
1563         spin_unlock(&qedi_conn->list_lock);
1564
1565         qedi_ring_doorbell(qedi_conn);
1566         return 0;
1567 }
1568
1569 int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
1570                           struct iscsi_task *mtask)
1571 {
1572         struct qedi_ctx *qedi = qedi_conn->qedi;
1573         struct iscsi_tm *tmf_hdr;
1574         struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1575         s16 tid = 0;
1576
1577         tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1578         qedi_cmd->task = mtask;
1579
1580         /* If abort task then schedule the work and return */
1581         if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1582             ISCSI_TM_FUNC_ABORT_TASK) {
1583                 qedi_cmd->state = CLEANUP_WAIT;
1584                 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
1585                 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1586
1587         } else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1588                     ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
1589                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1590                     ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
1591                    ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1592                     ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
1593                 tid = qedi_get_task_idx(qedi);
1594                 if (tid == -1) {
1595                         QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1596                                  qedi_conn->iscsi_conn_id);
1597                         return -1;
1598                 }
1599                 qedi_cmd->task_id = tid;
1600
1601                 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1602
1603         } else {
1604                 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1605                          qedi_conn->iscsi_conn_id);
1606                 return -1;
1607         }
1608
1609         return 0;
1610 }
1611
1612 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1613                          struct iscsi_task *task)
1614 {
1615         struct iscsi_text_request_hdr text_request_pdu_header;
1616         struct scsi_sgl_task_params tx_sgl_task_params;
1617         struct scsi_sgl_task_params rx_sgl_task_params;
1618         struct iscsi_task_params task_params;
1619         struct e4_iscsi_task_context *fw_task_ctx;
1620         struct qedi_ctx *qedi = qedi_conn->qedi;
1621         struct iscsi_text *text_hdr;
1622         struct scsi_sge *req_sge = NULL;
1623         struct scsi_sge *resp_sge = NULL;
1624         struct qedi_cmd *qedi_cmd;
1625         struct qedi_endpoint *ep;
1626         s16 tid = 0;
1627         u16 sq_idx = 0;
1628         int rval = 0;
1629
1630         req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1631         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1632         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1633         text_hdr = (struct iscsi_text *)task->hdr;
1634         ep = qedi_conn->ep;
1635
1636         tid = qedi_get_task_idx(qedi);
1637         if (tid == -1)
1638                 return -ENOMEM;
1639
1640         fw_task_ctx =
1641              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1642                                                                tid);
1643         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1644
1645         qedi_cmd->task_id = tid;
1646
1647         memset(&task_params, 0, sizeof(task_params));
1648         memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1649         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1650         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1651
1652         /* Update header info */
1653         text_request_pdu_header.opcode = text_hdr->opcode;
1654         text_request_pdu_header.flags_attr = text_hdr->flags;
1655
1656         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1657         text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1658         text_request_pdu_header.ttt = text_hdr->ttt;
1659         text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1660         text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1661         text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1662
1663         /* Fill tx AHS and rx buffer */
1664         tx_sgl_task_params.sgl =
1665                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1666         tx_sgl_task_params.sgl_phys_addr.lo =
1667                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1668         tx_sgl_task_params.sgl_phys_addr.hi =
1669                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1670         tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1671         tx_sgl_task_params.num_sges = 1;
1672
1673         rx_sgl_task_params.sgl =
1674                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1675         rx_sgl_task_params.sgl_phys_addr.lo =
1676                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1677         rx_sgl_task_params.sgl_phys_addr.hi =
1678                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1679         rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1680         rx_sgl_task_params.num_sges = 1;
1681
1682         /* Fill fw input params */
1683         task_params.context = fw_task_ctx;
1684         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1685         task_params.itid = tid;
1686         task_params.cq_rss_number = 0;
1687         task_params.tx_io_size = ntoh24(text_hdr->dlength);
1688         task_params.rx_io_size = resp_sge->sge_len;
1689
1690         sq_idx = qedi_get_wqe_idx(qedi_conn);
1691         task_params.sqe = &ep->sq[sq_idx];
1692
1693         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1694         rval = init_initiator_text_request_task(&task_params,
1695                                                 &text_request_pdu_header,
1696                                                 &tx_sgl_task_params,
1697                                                 &rx_sgl_task_params);
1698         if (rval)
1699                 return -1;
1700
1701         spin_lock(&qedi_conn->list_lock);
1702         list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1703         qedi_cmd->io_cmd_in_list = true;
1704         qedi_conn->active_cmd_count++;
1705         spin_unlock(&qedi_conn->list_lock);
1706
1707         qedi_ring_doorbell(qedi_conn);
1708         return 0;
1709 }
1710
1711 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1712                            struct iscsi_task *task,
1713                            char *datap, int data_len, int unsol)
1714 {
1715         struct iscsi_nop_out_hdr nop_out_pdu_header;
1716         struct scsi_sgl_task_params tx_sgl_task_params;
1717         struct scsi_sgl_task_params rx_sgl_task_params;
1718         struct iscsi_task_params task_params;
1719         struct qedi_ctx *qedi = qedi_conn->qedi;
1720         struct e4_iscsi_task_context *fw_task_ctx;
1721         struct iscsi_nopout *nopout_hdr;
1722         struct scsi_sge *resp_sge = NULL;
1723         struct qedi_cmd *qedi_cmd;
1724         struct qedi_endpoint *ep;
1725         u32 scsi_lun[2];
1726         s16 tid = 0;
1727         u16 sq_idx = 0;
1728         int rval = 0;
1729
1730         resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1731         qedi_cmd = (struct qedi_cmd *)task->dd_data;
1732         nopout_hdr = (struct iscsi_nopout *)task->hdr;
1733         ep = qedi_conn->ep;
1734
1735         tid = qedi_get_task_idx(qedi);
1736         if (tid == -1)
1737                 return -ENOMEM;
1738
1739         fw_task_ctx =
1740              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1741                                                                tid);
1742         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1743
1744         qedi_cmd->task_id = tid;
1745
1746         memset(&task_params, 0, sizeof(task_params));
1747         memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1748         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1749         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1750
1751         /* Update header info */
1752         nop_out_pdu_header.opcode = nopout_hdr->opcode;
1753         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1754         SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1755
1756         memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1757         nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1758         nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1759         nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1760         nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1761
1762         qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1763
1764         if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1765                 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1766                 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1767         } else {
1768                 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1769                 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1770
1771                 spin_lock(&qedi_conn->list_lock);
1772                 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1773                 qedi_cmd->io_cmd_in_list = true;
1774                 qedi_conn->active_cmd_count++;
1775                 spin_unlock(&qedi_conn->list_lock);
1776         }
1777
1778         /* Fill tx AHS and rx buffer */
1779         if (data_len) {
1780                 tx_sgl_task_params.sgl =
1781                                (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1782                 tx_sgl_task_params.sgl_phys_addr.lo =
1783                                          (u32)(qedi_conn->gen_pdu.req_dma_addr);
1784                 tx_sgl_task_params.sgl_phys_addr.hi =
1785                               (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1786                 tx_sgl_task_params.total_buffer_size = data_len;
1787                 tx_sgl_task_params.num_sges = 1;
1788
1789                 rx_sgl_task_params.sgl =
1790                               (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1791                 rx_sgl_task_params.sgl_phys_addr.lo =
1792                                         (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1793                 rx_sgl_task_params.sgl_phys_addr.hi =
1794                              (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1795                 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1796                 rx_sgl_task_params.num_sges = 1;
1797         }
1798
1799         /* Fill fw input params */
1800         task_params.context = fw_task_ctx;
1801         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1802         task_params.itid = tid;
1803         task_params.cq_rss_number = 0;
1804         task_params.tx_io_size = data_len;
1805         task_params.rx_io_size = resp_sge->sge_len;
1806
1807         sq_idx = qedi_get_wqe_idx(qedi_conn);
1808         task_params.sqe = &ep->sq[sq_idx];
1809
1810         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1811         rval = init_initiator_nop_out_task(&task_params,
1812                                            &nop_out_pdu_header,
1813                                            &tx_sgl_task_params,
1814                                            &rx_sgl_task_params);
1815         if (rval)
1816                 return -1;
1817
1818         qedi_ring_doorbell(qedi_conn);
1819         return 0;
1820 }
1821
1822 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1823                          int bd_index)
1824 {
1825         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1826         int frag_size, sg_frags;
1827
1828         sg_frags = 0;
1829
1830         while (sg_len) {
1831                 if (addr % QEDI_PAGE_SIZE)
1832                         frag_size =
1833                                    (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1834                 else
1835                         frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1836                                     (sg_len % QEDI_BD_SPLIT_SZ);
1837
1838                 if (frag_size == 0)
1839                         frag_size = QEDI_BD_SPLIT_SZ;
1840
1841                 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1842                 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1843                 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1844                 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1845                           "split sge %d: addr=%llx, len=%x",
1846                           (bd_index + sg_frags), addr, frag_size);
1847
1848                 addr += (u64)frag_size;
1849                 sg_frags++;
1850                 sg_len -= frag_size;
1851         }
1852         return sg_frags;
1853 }
1854
1855 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1856 {
1857         struct scsi_cmnd *sc = cmd->scsi_cmd;
1858         struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1859         struct scatterlist *sg;
1860         int byte_count = 0;
1861         int bd_count = 0;
1862         int sg_count;
1863         int sg_len;
1864         int sg_frags;
1865         u64 addr, end_addr;
1866         int i;
1867
1868         WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1869
1870         sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1871                               scsi_sg_count(sc), sc->sc_data_direction);
1872
1873         /*
1874          * New condition to send single SGE as cached-SGL.
1875          * Single SGE with length less than 64K.
1876          */
1877         sg = scsi_sglist(sc);
1878         if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1879                 sg_len = sg_dma_len(sg);
1880                 addr = (u64)sg_dma_address(sg);
1881
1882                 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1883                 bd[bd_count].sge_addr.hi = (addr >> 32);
1884                 bd[bd_count].sge_len = (u16)sg_len;
1885
1886                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1887                           "single-cached-sgl: bd_count:%d addr=%llx, len=%x",
1888                           sg_count, addr, sg_len);
1889
1890                 return ++bd_count;
1891         }
1892
1893         scsi_for_each_sg(sc, sg, sg_count, i) {
1894                 sg_len = sg_dma_len(sg);
1895                 addr = (u64)sg_dma_address(sg);
1896                 end_addr = (addr + sg_len);
1897
1898                 /*
1899                  * first sg elem in the 'list',
1900                  * check if end addr is page-aligned.
1901                  */
1902                 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1903                         cmd->use_slowpath = true;
1904
1905                 /*
1906                  * last sg elem in the 'list',
1907                  * check if start addr is page-aligned.
1908                  */
1909                 else if ((i == (sg_count - 1)) &&
1910                          (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1911                         cmd->use_slowpath = true;
1912
1913                 /*
1914                  * middle sg elements in list,
1915                  * check if start and end addr is page-aligned
1916                  */
1917                 else if ((i != 0) && (i != (sg_count - 1)) &&
1918                          ((addr % QEDI_PAGE_SIZE) ||
1919                          (end_addr % QEDI_PAGE_SIZE)))
1920                         cmd->use_slowpath = true;
1921
1922                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1923                           i, sg_len);
1924
1925                 if (sg_len > QEDI_BD_SPLIT_SZ) {
1926                         sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1927                 } else {
1928                         sg_frags = 1;
1929                         bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1930                         bd[bd_count].sge_addr.hi = addr >> 32;
1931                         bd[bd_count].sge_len = sg_len;
1932                 }
1933                 byte_count += sg_len;
1934                 bd_count += sg_frags;
1935         }
1936
1937         if (byte_count != scsi_bufflen(sc))
1938                 QEDI_ERR(&qedi->dbg_ctx,
1939                          "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1940                          scsi_bufflen(sc));
1941         else
1942                 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1943                           byte_count);
1944
1945         WARN_ON(byte_count != scsi_bufflen(sc));
1946
1947         return bd_count;
1948 }
1949
1950 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1951 {
1952         int bd_count;
1953         struct scsi_cmnd *sc = cmd->scsi_cmd;
1954
1955         if (scsi_sg_count(sc)) {
1956                 bd_count  = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1957                 if (bd_count == 0)
1958                         return;
1959         } else {
1960                 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1961
1962                 bd[0].sge_addr.lo = 0;
1963                 bd[0].sge_addr.hi = 0;
1964                 bd[0].sge_len = 0;
1965                 bd_count = 0;
1966         }
1967         cmd->io_tbl.sge_valid = bd_count;
1968 }
1969
1970 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1971 {
1972         u32 dword;
1973         int lpcnt;
1974         u8 *srcp;
1975
1976         lpcnt = sc->cmd_len / sizeof(dword);
1977         srcp = (u8 *)sc->cmnd;
1978         while (lpcnt--) {
1979                 memcpy(&dword, (const void *)srcp, 4);
1980                 *dstp = cpu_to_be32(dword);
1981                 srcp += 4;
1982                 dstp++;
1983         }
1984         if (sc->cmd_len & 0x3) {
1985                 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1986                 *dstp = cpu_to_be32(dword);
1987         }
1988 }
1989
1990 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
1991                    u16 tid, int8_t direction)
1992 {
1993         struct qedi_io_log *io_log;
1994         struct iscsi_conn *conn = task->conn;
1995         struct qedi_conn *qedi_conn = conn->dd_data;
1996         struct scsi_cmnd *sc_cmd = task->sc;
1997         unsigned long flags;
1998
1999         spin_lock_irqsave(&qedi->io_trace_lock, flags);
2000
2001         io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
2002         io_log->direction = direction;
2003         io_log->task_id = tid;
2004         io_log->cid = qedi_conn->iscsi_conn_id;
2005         io_log->lun = sc_cmd->device->lun;
2006         io_log->op = sc_cmd->cmnd[0];
2007         io_log->lba[0] = sc_cmd->cmnd[2];
2008         io_log->lba[1] = sc_cmd->cmnd[3];
2009         io_log->lba[2] = sc_cmd->cmnd[4];
2010         io_log->lba[3] = sc_cmd->cmnd[5];
2011         io_log->bufflen = scsi_bufflen(sc_cmd);
2012         io_log->sg_count = scsi_sg_count(sc_cmd);
2013         io_log->fast_sgs = qedi->fast_sgls;
2014         io_log->cached_sgs = qedi->cached_sgls;
2015         io_log->slow_sgs = qedi->slow_sgls;
2016         io_log->cached_sge = qedi->use_cached_sge;
2017         io_log->slow_sge = qedi->use_slow_sge;
2018         io_log->fast_sge = qedi->use_fast_sge;
2019         io_log->result = sc_cmd->result;
2020         io_log->jiffies = jiffies;
2021         io_log->blk_req_cpu = smp_processor_id();
2022
2023         if (direction == QEDI_IO_TRACE_REQ) {
2024                 /* For requests we only care about the submission CPU */
2025                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2026                 io_log->intr_cpu = 0;
2027                 io_log->blk_rsp_cpu = 0;
2028         } else if (direction == QEDI_IO_TRACE_RSP) {
2029                 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2030                 io_log->intr_cpu = qedi->intr_cpu;
2031                 io_log->blk_rsp_cpu = smp_processor_id();
2032         }
2033
2034         qedi->io_trace_idx++;
2035         if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
2036                 qedi->io_trace_idx = 0;
2037
2038         qedi->use_cached_sge = false;
2039         qedi->use_slow_sge = false;
2040         qedi->use_fast_sge = false;
2041
2042         spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
2043 }
2044
2045 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
2046 {
2047         struct iscsi_conn *conn = task->conn;
2048         struct iscsi_session *session = conn->session;
2049         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
2050         struct qedi_ctx *qedi = iscsi_host_priv(shost);
2051         struct qedi_conn *qedi_conn = conn->dd_data;
2052         struct qedi_cmd *cmd = task->dd_data;
2053         struct scsi_cmnd *sc = task->sc;
2054         struct iscsi_cmd_hdr cmd_pdu_header;
2055         struct scsi_sgl_task_params tx_sgl_task_params;
2056         struct scsi_sgl_task_params rx_sgl_task_params;
2057         struct scsi_sgl_task_params *prx_sgl = NULL;
2058         struct scsi_sgl_task_params *ptx_sgl = NULL;
2059         struct iscsi_task_params task_params;
2060         struct iscsi_conn_params conn_params;
2061         struct scsi_initiator_cmd_params cmd_params;
2062         struct e4_iscsi_task_context *fw_task_ctx;
2063         struct iscsi_cls_conn *cls_conn;
2064         struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
2065         enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
2066         struct qedi_endpoint *ep;
2067         u32 scsi_lun[2];
2068         s16 tid = 0;
2069         u16 sq_idx = 0;
2070         u16 cq_idx;
2071         int rval = 0;
2072
2073         ep = qedi_conn->ep;
2074         cls_conn = qedi_conn->cls_conn;
2075         conn = cls_conn->dd_data;
2076
2077         qedi_iscsi_map_sg_list(cmd);
2078         int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2079
2080         tid = qedi_get_task_idx(qedi);
2081         if (tid == -1)
2082                 return -ENOMEM;
2083
2084         fw_task_ctx =
2085              (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2086                                                                tid);
2087         memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
2088
2089         cmd->task_id = tid;
2090
2091         memset(&task_params, 0, sizeof(task_params));
2092         memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2093         memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2094         memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2095         memset(&conn_params, 0, sizeof(conn_params));
2096         memset(&cmd_params, 0, sizeof(cmd_params));
2097
2098         cq_idx = smp_processor_id() % qedi->num_queues;
2099         /* Update header info */
2100         SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2101                   ISCSI_ATTR_SIMPLE);
2102         if (hdr->cdb[0] != TEST_UNIT_READY) {
2103                 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2104                         SET_FIELD(cmd_pdu_header.flags_attr,
2105                                   ISCSI_CMD_HDR_WRITE, 1);
2106                         task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2107                 } else {
2108                         SET_FIELD(cmd_pdu_header.flags_attr,
2109                                   ISCSI_CMD_HDR_READ, 1);
2110                         task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2111                 }
2112         }
2113
2114         cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2115         cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2116
2117         qedi_update_itt_map(qedi, tid, task->itt, cmd);
2118         cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2119         cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2120         cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2121         cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2122         cmd_pdu_header.hdr_first_byte = hdr->opcode;
2123         qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2124
2125         /* Fill tx AHS and rx buffer */
2126         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2127                 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2128                 tx_sgl_task_params.sgl_phys_addr.lo =
2129                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2130                 tx_sgl_task_params.sgl_phys_addr.hi =
2131                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2132                 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2133                 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2134                 if (cmd->use_slowpath)
2135                         tx_sgl_task_params.small_mid_sge = true;
2136         } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2137                 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2138                 rx_sgl_task_params.sgl_phys_addr.lo =
2139                                                  (u32)(cmd->io_tbl.sge_tbl_dma);
2140                 rx_sgl_task_params.sgl_phys_addr.hi =
2141                                       (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2142                 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2143                 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2144         }
2145
2146         /* Add conn param */
2147         conn_params.first_burst_length = conn->session->first_burst;
2148         conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2149         conn_params.max_burst_length = conn->session->max_burst;
2150         if (conn->session->initial_r2t_en)
2151                 conn_params.initial_r2t = true;
2152         if (conn->session->imm_data_en)
2153                 conn_params.immediate_data = true;
2154
2155         /* Add cmd params */
2156         cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2157         cmd_params.sense_data_buffer_phys_addr.hi =
2158                                         (u32)((u64)cmd->sense_buffer_dma >> 32);
2159         /* Fill fw input params */
2160         task_params.context = fw_task_ctx;
2161         task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2162         task_params.itid = tid;
2163         task_params.cq_rss_number = cq_idx;
2164         if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2165                 task_params.tx_io_size = scsi_bufflen(sc);
2166         else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2167                 task_params.rx_io_size = scsi_bufflen(sc);
2168
2169         sq_idx = qedi_get_wqe_idx(qedi_conn);
2170         task_params.sqe = &ep->sq[sq_idx];
2171
2172         QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2173                   "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2174                   (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2175                   "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2176                   "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2177                   (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2178                   (u32)(cmd->io_tbl.sge_tbl_dma),
2179                   (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2180
2181         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2182
2183         if (task_params.tx_io_size != 0)
2184                 ptx_sgl = &tx_sgl_task_params;
2185         if (task_params.rx_io_size != 0)
2186                 prx_sgl = &rx_sgl_task_params;
2187
2188         rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2189                                             &cmd_params, &cmd_pdu_header,
2190                                             ptx_sgl, prx_sgl,
2191                                             NULL);
2192         if (rval)
2193                 return -1;
2194
2195         spin_lock(&qedi_conn->list_lock);
2196         list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2197         cmd->io_cmd_in_list = true;
2198         qedi_conn->active_cmd_count++;
2199         spin_unlock(&qedi_conn->list_lock);
2200
2201         qedi_ring_doorbell(qedi_conn);
2202         return 0;
2203 }
2204
2205 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2206 {
2207         struct iscsi_task_params task_params;
2208         struct qedi_endpoint *ep;
2209         struct iscsi_conn *conn = task->conn;
2210         struct qedi_conn *qedi_conn = conn->dd_data;
2211         struct qedi_cmd *cmd = task->dd_data;
2212         u16 sq_idx = 0;
2213         int rval = 0;
2214
2215         QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2216                   "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2217                   cmd->task_id, get_itt(task->itt), task->state,
2218                   cmd->state, qedi_conn->iscsi_conn_id);
2219
2220         memset(&task_params, 0, sizeof(task_params));
2221         ep = qedi_conn->ep;
2222
2223         sq_idx = qedi_get_wqe_idx(qedi_conn);
2224
2225         task_params.sqe = &ep->sq[sq_idx];
2226         memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2227         task_params.itid = cmd->task_id;
2228
2229         rval = init_cleanup_task(&task_params);
2230         if (rval)
2231                 return rval;
2232
2233         qedi_ring_doorbell(qedi_conn);
2234         return 0;
2235 }