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