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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / scsi / qedi / qedi_fw.c
blob946cebc4c9322a1349147fd5f7e9cfa262013c1d
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 tmp;
356 u16 idx = 0;
357 struct scsi_bd *pbl;
358
359 /* Obtain buffer address from rqe_opaque */
360 idx = cqe->rqe_opaque;
361 if (idx > (QEDI_BDQ_NUM - 1)) {
362 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
363 "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
364 idx);
365 return;
366 }
367
368 pbl = (struct scsi_bd *)qedi->bdq_pbl;
369 pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
370 pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
371 pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
372 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
373 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
374 pbl, pbl->address.hi, pbl->address.lo, idx);
375 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
376 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
377 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
378 pbl->opaque.iscsi_opaque.opaque = cpu_to_le32(idx);
379
380 /* Increment producer to let f/w know we've handled the frame */
381 qedi->bdq_prod_idx += count;
382
383 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
384 tmp = readw(qedi->bdq_primary_prod);
385
386 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
387 tmp = readw(qedi->bdq_secondary_prod);
388 }
389
390 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
391 struct iscsi_cqe_unsolicited *cqe,
392 u32 pdu_len, u32 num_bdqs,
393 char *bdq_data)
394 {
395 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
396 "num_bdqs [%d]\n", num_bdqs);
397
398 qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
399 qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
400 }
401
402 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
403 union iscsi_cqe *cqe,
404 struct iscsi_task *task,
405 struct qedi_conn *qedi_conn, u16 que_idx)
406 {
407 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
408 struct iscsi_session *session = conn->session;
409 struct iscsi_nop_in_hdr *cqe_nop_in;
410 struct iscsi_nopin *hdr;
411 struct qedi_cmd *cmd;
412 int tgt_async_nop = 0;
413 u32 lun[2];
414 u32 pdu_len, num_bdqs;
415 char bdq_data[QEDI_BDQ_BUF_SIZE];
416 unsigned long flags;
417
418 spin_lock_bh(&session->back_lock);
419 cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
420
421 pdu_len = cqe_nop_in->hdr_second_dword &
422 ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
423 num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
424
425 hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
426 memset(hdr, 0, sizeof(struct iscsi_hdr));
427 hdr->opcode = cqe_nop_in->opcode;
428 hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
429 hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
430 hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
431 hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
432
433 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
434 spin_lock_irqsave(&qedi->hba_lock, flags);
435 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
436 pdu_len, num_bdqs, bdq_data);
437 hdr->itt = RESERVED_ITT;
438 tgt_async_nop = 1;
439 spin_unlock_irqrestore(&qedi->hba_lock, flags);
440 goto done;
441 }
442
443 /* Response to one of our nop-outs */
444 if (task) {
445 cmd = task->dd_data;
446 hdr->flags = ISCSI_FLAG_CMD_FINAL;
447 hdr->itt = build_itt(cqe->cqe_solicited.itid,
448 conn->session->age);
449 lun[0] = 0xffffffff;
450 lun[1] = 0xffffffff;
451 memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
452 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
453 "Freeing tid=0x%x for cid=0x%x\n",
454 cmd->task_id, qedi_conn->iscsi_conn_id);
455 cmd->state = RESPONSE_RECEIVED;
456 spin_lock(&qedi_conn->list_lock);
457 if (likely(cmd->io_cmd_in_list)) {
458 cmd->io_cmd_in_list = false;
459 list_del_init(&cmd->io_cmd);
460 qedi_conn->active_cmd_count--;
461 }
462
463 spin_unlock(&qedi_conn->list_lock);
464 qedi_clear_task_idx(qedi, cmd->task_id);
465 }
466
467 done:
468 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
469
470 spin_unlock_bh(&session->back_lock);
471 return tgt_async_nop;
472 }
473
474 static void qedi_process_async_mesg(struct qedi_ctx *qedi,
475 union iscsi_cqe *cqe,
476 struct iscsi_task *task,
477 struct qedi_conn *qedi_conn,
478 u16 que_idx)
479 {
480 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
481 struct iscsi_session *session = conn->session;
482 struct iscsi_async_msg_hdr *cqe_async_msg;
483 struct iscsi_async *resp_hdr;
484 u32 lun[2];
485 u32 pdu_len, num_bdqs;
486 char bdq_data[QEDI_BDQ_BUF_SIZE];
487 unsigned long flags;
488
489 spin_lock_bh(&session->back_lock);
490
491 cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
492 pdu_len = cqe_async_msg->hdr_second_dword &
493 ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
494 num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
495
496 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
497 spin_lock_irqsave(&qedi->hba_lock, flags);
498 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
499 pdu_len, num_bdqs, bdq_data);
500 spin_unlock_irqrestore(&qedi->hba_lock, flags);
501 }
502
503 resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
504 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
505 resp_hdr->opcode = cqe_async_msg->opcode;
506 resp_hdr->flags = 0x80;
507
508 lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
509 lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
510 memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
511 resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
512 resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
513 resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
514
515 resp_hdr->async_event = cqe_async_msg->async_event;
516 resp_hdr->async_vcode = cqe_async_msg->async_vcode;
517
518 resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
519 resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
520 resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
521
522 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
523 pdu_len);
524
525 spin_unlock_bh(&session->back_lock);
526 }
527
528 static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
529 union iscsi_cqe *cqe,
530 struct iscsi_task *task,
531 struct qedi_conn *qedi_conn,
532 uint16_t que_idx)
533 {
534 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
535 struct iscsi_session *session = conn->session;
536 struct iscsi_reject_hdr *cqe_reject;
537 struct iscsi_reject *hdr;
538 u32 pld_len, num_bdqs;
539 unsigned long flags;
540
541 spin_lock_bh(&session->back_lock);
542 cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
543 pld_len = cqe_reject->hdr_second_dword &
544 ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
545 num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
546
547 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
548 spin_lock_irqsave(&qedi->hba_lock, flags);
549 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
550 pld_len, num_bdqs, conn->data);
551 spin_unlock_irqrestore(&qedi->hba_lock, flags);
552 }
553 hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
554 memset(hdr, 0, sizeof(struct iscsi_hdr));
555 hdr->opcode = cqe_reject->opcode;
556 hdr->reason = cqe_reject->hdr_reason;
557 hdr->flags = cqe_reject->hdr_flags;
558 hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
559 ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
560 hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
561 hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
562 hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
563 hdr->ffffffff = cpu_to_be32(0xffffffff);
564
565 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
566 conn->data, pld_len);
567 spin_unlock_bh(&session->back_lock);
568 }
569
570 static void qedi_scsi_completion(struct qedi_ctx *qedi,
571 union iscsi_cqe *cqe,
572 struct iscsi_task *task,
573 struct iscsi_conn *conn)
574 {
575 struct scsi_cmnd *sc_cmd;
576 struct qedi_cmd *cmd = task->dd_data;
577 struct iscsi_session *session = conn->session;
578 struct iscsi_scsi_rsp *hdr;
579 struct iscsi_data_in_hdr *cqe_data_in;
580 int datalen = 0;
581 struct qedi_conn *qedi_conn;
582 u32 iscsi_cid;
583 u8 cqe_err_bits = 0;
584
585 iscsi_cid = cqe->cqe_common.conn_id;
586 qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
587
588 cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
589 cqe_err_bits =
590 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
591
592 spin_lock_bh(&session->back_lock);
593 /* get the scsi command */
594 sc_cmd = cmd->scsi_cmd;
595
596 if (!sc_cmd) {
597 QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
598 goto error;
599 }
600
601 if (!sc_cmd->SCp.ptr) {
602 QEDI_WARN(&qedi->dbg_ctx,
603 "SCp.ptr is NULL, returned in another context.\n");
604 goto error;
605 }
606
607 if (!sc_cmd->request) {
608 QEDI_WARN(&qedi->dbg_ctx,
609 "sc_cmd->request is NULL, sc_cmd=%p.\n",
610 sc_cmd);
611 goto error;
612 }
613
614 if (!sc_cmd->request->q) {
615 QEDI_WARN(&qedi->dbg_ctx,
616 "request->q is NULL so request is not valid, sc_cmd=%p.\n",
617 sc_cmd);
618 goto error;
619 }
620
621 qedi_iscsi_unmap_sg_list(cmd);
622
623 hdr = (struct iscsi_scsi_rsp *)task->hdr;
624 hdr->opcode = cqe_data_in->opcode;
625 hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
626 hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
627 hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
628 hdr->response = cqe_data_in->reserved1;
629 hdr->cmd_status = cqe_data_in->status_rsvd;
630 hdr->flags = cqe_data_in->flags;
631 hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
632
633 if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
634 datalen = cqe_data_in->reserved2 &
635 ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
636 memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
637 }
638
639 /* If f/w reports data underrun err then set residual to IO transfer
640 * length, set Underrun flag and clear Overrun flag explicitly
641 */
642 if (unlikely(cqe_err_bits &&
643 GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
644 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
645 "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
646 hdr->itt, cqe_data_in->flags, cmd->task_id,
647 qedi_conn->iscsi_conn_id, hdr->residual_count,
648 scsi_bufflen(sc_cmd));
649 hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
650 hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
651 hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
652 }
653
654 spin_lock(&qedi_conn->list_lock);
655 if (likely(cmd->io_cmd_in_list)) {
656 cmd->io_cmd_in_list = false;
657 list_del_init(&cmd->io_cmd);
658 qedi_conn->active_cmd_count--;
659 }
660 spin_unlock(&qedi_conn->list_lock);
661
662 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
663 "Freeing tid=0x%x for cid=0x%x\n",
664 cmd->task_id, qedi_conn->iscsi_conn_id);
665 cmd->state = RESPONSE_RECEIVED;
666 if (qedi_io_tracing)
667 qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
668
669 qedi_clear_task_idx(qedi, cmd->task_id);
670 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
671 conn->data, datalen);
672 error:
673 spin_unlock_bh(&session->back_lock);
674 }
675
676 static void qedi_mtask_completion(struct qedi_ctx *qedi,
677 union iscsi_cqe *cqe,
678 struct iscsi_task *task,
679 struct qedi_conn *conn, uint16_t que_idx)
680 {
681 struct iscsi_conn *iscsi_conn;
682 u32 hdr_opcode;
683
684 hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
685 iscsi_conn = conn->cls_conn->dd_data;
686
687 switch (hdr_opcode) {
688 case ISCSI_OPCODE_SCSI_RESPONSE:
689 case ISCSI_OPCODE_DATA_IN:
690 qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
691 break;
692 case ISCSI_OPCODE_LOGIN_RESPONSE:
693 qedi_process_login_resp(qedi, cqe, task, conn);
694 break;
695 case ISCSI_OPCODE_TMF_RESPONSE:
696 qedi_process_tmf_resp(qedi, cqe, task, conn);
697 break;
698 case ISCSI_OPCODE_TEXT_RESPONSE:
699 qedi_process_text_resp(qedi, cqe, task, conn);
700 break;
701 case ISCSI_OPCODE_LOGOUT_RESPONSE:
702 qedi_process_logout_resp(qedi, cqe, task, conn);
703 break;
704 case ISCSI_OPCODE_NOP_IN:
705 qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
706 break;
707 default:
708 QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
709 }
710 }
711
712 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
713 struct iscsi_cqe_solicited *cqe,
714 struct iscsi_task *task,
715 struct qedi_conn *qedi_conn)
716 {
717 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
718 struct iscsi_session *session = conn->session;
719 struct qedi_cmd *cmd = task->dd_data;
720
721 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
722 "itid=0x%x, cmd task id=0x%x\n",
723 cqe->itid, cmd->task_id);
724
725 cmd->state = RESPONSE_RECEIVED;
726 qedi_clear_task_idx(qedi, cmd->task_id);
727
728 spin_lock_bh(&session->back_lock);
729 __iscsi_put_task(task);
730 spin_unlock_bh(&session->back_lock);
731 }
732
733 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
734 struct iscsi_cqe_solicited *cqe,
735 struct iscsi_task *task,
736 struct iscsi_conn *conn)
737 {
738 struct qedi_work_map *work, *work_tmp;
739 u32 proto_itt = cqe->itid;
740 u32 ptmp_itt = 0;
741 itt_t protoitt = 0;
742 int found = 0;
743 struct qedi_cmd *qedi_cmd = NULL;
744 u32 rtid = 0;
745 u32 iscsi_cid;
746 struct qedi_conn *qedi_conn;
747 struct qedi_cmd *dbg_cmd;
748 struct iscsi_task *mtask;
749 struct iscsi_tm *tmf_hdr = NULL;
750
751 iscsi_cid = cqe->conn_id;
752 qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
753 if (!qedi_conn) {
754 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
755 "icid not found 0x%x\n", cqe->conn_id);
756 return;
757 }
758
759 /* Based on this itt get the corresponding qedi_cmd */
760 spin_lock_bh(&qedi_conn->tmf_work_lock);
761 list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
762 list) {
763 if (work->rtid == proto_itt) {
764 /* We found the command */
765 qedi_cmd = work->qedi_cmd;
766 if (!qedi_cmd->list_tmf_work) {
767 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
768 "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
769 proto_itt, qedi_conn->iscsi_conn_id);
770 WARN_ON(1);
771 }
772 found = 1;
773 mtask = qedi_cmd->task;
774 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
775 rtid = work->rtid;
776
777 list_del_init(&work->list);
778 kfree(work);
779 qedi_cmd->list_tmf_work = NULL;
780 }
781 }
782 spin_unlock_bh(&qedi_conn->tmf_work_lock);
783
784 if (found) {
785 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
786 "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
787 proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
788
789 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
790 ISCSI_TM_FUNC_ABORT_TASK) {
791 spin_lock_bh(&conn->session->back_lock);
792
793 protoitt = build_itt(get_itt(tmf_hdr->rtt),
794 conn->session->age);
795 task = iscsi_itt_to_task(conn, protoitt);
796
797 spin_unlock_bh(&conn->session->back_lock);
798
799 if (!task) {
800 QEDI_NOTICE(&qedi->dbg_ctx,
801 "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
802 get_itt(tmf_hdr->rtt),
803 qedi_conn->iscsi_conn_id);
804 return;
805 }
806
807 dbg_cmd = task->dd_data;
808
809 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
810 "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
811 get_itt(tmf_hdr->rtt), get_itt(task->itt),
812 dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
813
814 if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
815 qedi_cmd->state = CLEANUP_RECV;
816
817 qedi_clear_task_idx(qedi_conn->qedi, rtid);
818
819 spin_lock(&qedi_conn->list_lock);
820 list_del_init(&dbg_cmd->io_cmd);
821 qedi_conn->active_cmd_count--;
822 spin_unlock(&qedi_conn->list_lock);
823 qedi_cmd->state = CLEANUP_RECV;
824 wake_up_interruptible(&qedi_conn->wait_queue);
825 }
826 } else if (qedi_conn->cmd_cleanup_req > 0) {
827 spin_lock_bh(&conn->session->back_lock);
828 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
829 protoitt = build_itt(ptmp_itt, conn->session->age);
830 task = iscsi_itt_to_task(conn, protoitt);
831 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
832 "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
833 cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
834 qedi_conn->iscsi_conn_id);
835
836 spin_unlock_bh(&conn->session->back_lock);
837 if (!task) {
838 QEDI_NOTICE(&qedi->dbg_ctx,
839 "task is null, itid=0x%x, cid=0x%x\n",
840 cqe->itid, qedi_conn->iscsi_conn_id);
841 return;
842 }
843 qedi_conn->cmd_cleanup_cmpl++;
844 wake_up(&qedi_conn->wait_queue);
845
846 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
847 "Freeing tid=0x%x for cid=0x%x\n",
848 cqe->itid, qedi_conn->iscsi_conn_id);
849 qedi_clear_task_idx(qedi_conn->qedi, cqe->itid);
850
851 } else {
852 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
853 protoitt = build_itt(ptmp_itt, conn->session->age);
854 task = iscsi_itt_to_task(conn, protoitt);
855 QEDI_ERR(&qedi->dbg_ctx,
856 "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
857 protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
858 }
859 }
860
861 void qedi_fp_process_cqes(struct qedi_work *work)
862 {
863 struct qedi_ctx *qedi = work->qedi;
864 union iscsi_cqe *cqe = &work->cqe;
865 struct iscsi_task *task = NULL;
866 struct iscsi_nopout *nopout_hdr;
867 struct qedi_conn *q_conn;
868 struct iscsi_conn *conn;
869 struct qedi_cmd *qedi_cmd;
870 u32 comp_type;
871 u32 iscsi_cid;
872 u32 hdr_opcode;
873 u16 que_idx = work->que_idx;
874 u8 cqe_err_bits = 0;
875
876 comp_type = cqe->cqe_common.cqe_type;
877 hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
878 cqe_err_bits =
879 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
880
881 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
882 "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
883 cqe->cqe_common.conn_id, comp_type, hdr_opcode);
884
885 if (comp_type >= MAX_ISCSI_CQES_TYPE) {
886 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
887 return;
888 }
889
890 iscsi_cid = cqe->cqe_common.conn_id;
891 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
892 if (!q_conn) {
893 QEDI_WARN(&qedi->dbg_ctx,
894 "Session no longer exists for cid=0x%x!!\n",
895 iscsi_cid);
896 return;
897 }
898
899 conn = q_conn->cls_conn->dd_data;
900
901 if (unlikely(cqe_err_bits &&
902 GET_FIELD(cqe_err_bits,
903 CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
904 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
905 return;
906 }
907
908 switch (comp_type) {
909 case ISCSI_CQE_TYPE_SOLICITED:
910 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
911 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
912 task = qedi_cmd->task;
913 if (!task) {
914 QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
915 return;
916 }
917
918 /* Process NOPIN local completion */
919 nopout_hdr = (struct iscsi_nopout *)task->hdr;
920 if ((nopout_hdr->itt == RESERVED_ITT) &&
921 (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
922 qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
923 task, q_conn);
924 } else {
925 cqe->cqe_solicited.itid =
926 qedi_get_itt(cqe->cqe_solicited);
927 /* Process other solicited responses */
928 qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
929 }
930 break;
931 case ISCSI_CQE_TYPE_UNSOLICITED:
932 switch (hdr_opcode) {
933 case ISCSI_OPCODE_NOP_IN:
934 qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
935 que_idx);
936 break;
937 case ISCSI_OPCODE_ASYNC_MSG:
938 qedi_process_async_mesg(qedi, cqe, task, q_conn,
939 que_idx);
940 break;
941 case ISCSI_OPCODE_REJECT:
942 qedi_process_reject_mesg(qedi, cqe, task, q_conn,
943 que_idx);
944 break;
945 }
946 goto exit_fp_process;
947 case ISCSI_CQE_TYPE_DUMMY:
948 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
949 goto exit_fp_process;
950 case ISCSI_CQE_TYPE_TASK_CLEANUP:
951 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
952 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
953 conn);
954 goto exit_fp_process;
955 default:
956 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
957 break;
958 }
959
960 exit_fp_process:
961 return;
962 }
963
964 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
965 {
966 struct iscsi_db_data dbell = { 0 };
967
968 dbell.agg_flags = 0;
969
970 dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
971 dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
972 dbell.params |=
973 DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
974
975 dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
976 writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
977
978 /* Make sure fw write idx is coherent, and include both memory barriers
979 * as a failsafe as for some architectures the call is the same but on
980 * others they are two different assembly operations.
981 */
982 wmb();
983 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
984 "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
985 qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
986 qedi_conn->iscsi_conn_id);
987 }
988
989 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
990 {
991 struct qedi_endpoint *ep;
992 u16 rval;
993
994 ep = qedi_conn->ep;
995 rval = ep->sq_prod_idx;
996
997 /* Increament SQ index */
998 ep->sq_prod_idx++;
999 ep->fw_sq_prod_idx++;
1000 if (ep->sq_prod_idx == QEDI_SQ_SIZE)
1001 ep->sq_prod_idx = 0;
1002
1003 return rval;
1004 }
1005
1006 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
1007 struct iscsi_task *task)
1008 {
1009 struct iscsi_login_req_hdr login_req_pdu_header;
1010 struct scsi_sgl_task_params tx_sgl_task_params;
1011 struct scsi_sgl_task_params rx_sgl_task_params;
1012 struct iscsi_task_params task_params;
1013 struct e4_iscsi_task_context *fw_task_ctx;
1014 struct qedi_ctx *qedi = qedi_conn->qedi;
1015 struct iscsi_login_req *login_hdr;
1016 struct scsi_sge *resp_sge = NULL;
1017 struct qedi_cmd *qedi_cmd;
1018 struct qedi_endpoint *ep;
1019 s16 tid = 0;
1020 u16 sq_idx = 0;
1021 int rval = 0;
1022
1023 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1024 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1025 ep = qedi_conn->ep;
1026 login_hdr = (struct iscsi_login_req *)task->hdr;
1027
1028 tid = qedi_get_task_idx(qedi);
1029 if (tid == -1)
1030 return -ENOMEM;
1031
1032 fw_task_ctx =
1033 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1034 tid);
1035 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1036
1037 qedi_cmd->task_id = tid;
1038
1039 memset(&task_params, 0, sizeof(task_params));
1040 memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
1041 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1042 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1043 /* Update header info */
1044 login_req_pdu_header.opcode = login_hdr->opcode;
1045 login_req_pdu_header.version_min = login_hdr->min_version;
1046 login_req_pdu_header.version_max = login_hdr->max_version;
1047 login_req_pdu_header.flags_attr = login_hdr->flags;
1048 login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1049 login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1050
1051 login_req_pdu_header.tsih = login_hdr->tsih;
1052 login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1053
1054 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1055 login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1056 login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1057 login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1058 login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1059 login_req_pdu_header.exp_stat_sn = 0;
1060
1061 /* Fill tx AHS and rx buffer */
1062 tx_sgl_task_params.sgl =
1063 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1064 tx_sgl_task_params.sgl_phys_addr.lo =
1065 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1066 tx_sgl_task_params.sgl_phys_addr.hi =
1067 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1068 tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1069 tx_sgl_task_params.num_sges = 1;
1070
1071 rx_sgl_task_params.sgl =
1072 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1073 rx_sgl_task_params.sgl_phys_addr.lo =
1074 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1075 rx_sgl_task_params.sgl_phys_addr.hi =
1076 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1077 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1078 rx_sgl_task_params.num_sges = 1;
1079
1080 /* Fill fw input params */
1081 task_params.context = fw_task_ctx;
1082 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1083 task_params.itid = tid;
1084 task_params.cq_rss_number = 0;
1085 task_params.tx_io_size = ntoh24(login_hdr->dlength);
1086 task_params.rx_io_size = resp_sge->sge_len;
1087
1088 sq_idx = qedi_get_wqe_idx(qedi_conn);
1089 task_params.sqe = &ep->sq[sq_idx];
1090
1091 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1092 rval = init_initiator_login_request_task(&task_params,
1093 &login_req_pdu_header,
1094 &tx_sgl_task_params,
1095 &rx_sgl_task_params);
1096 if (rval)
1097 return -1;
1098
1099 spin_lock(&qedi_conn->list_lock);
1100 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1101 qedi_cmd->io_cmd_in_list = true;
1102 qedi_conn->active_cmd_count++;
1103 spin_unlock(&qedi_conn->list_lock);
1104
1105 qedi_ring_doorbell(qedi_conn);
1106 return 0;
1107 }
1108
1109 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1110 struct iscsi_task *task)
1111 {
1112 struct iscsi_logout_req_hdr logout_pdu_header;
1113 struct scsi_sgl_task_params tx_sgl_task_params;
1114 struct scsi_sgl_task_params rx_sgl_task_params;
1115 struct iscsi_task_params task_params;
1116 struct e4_iscsi_task_context *fw_task_ctx;
1117 struct iscsi_logout *logout_hdr = NULL;
1118 struct qedi_ctx *qedi = qedi_conn->qedi;
1119 struct qedi_cmd *qedi_cmd;
1120 struct qedi_endpoint *ep;
1121 s16 tid = 0;
1122 u16 sq_idx = 0;
1123 int rval = 0;
1124
1125 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1126 logout_hdr = (struct iscsi_logout *)task->hdr;
1127 ep = qedi_conn->ep;
1128
1129 tid = qedi_get_task_idx(qedi);
1130 if (tid == -1)
1131 return -ENOMEM;
1132
1133 fw_task_ctx =
1134 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1135 tid);
1136 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1137
1138 qedi_cmd->task_id = tid;
1139
1140 memset(&task_params, 0, sizeof(task_params));
1141 memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1142 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1143 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1144
1145 /* Update header info */
1146 logout_pdu_header.opcode = logout_hdr->opcode;
1147 logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1148 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1149 logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1150 logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1151 logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1152 logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1153
1154 /* Fill fw input params */
1155 task_params.context = fw_task_ctx;
1156 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1157 task_params.itid = tid;
1158 task_params.cq_rss_number = 0;
1159 task_params.tx_io_size = 0;
1160 task_params.rx_io_size = 0;
1161
1162 sq_idx = qedi_get_wqe_idx(qedi_conn);
1163 task_params.sqe = &ep->sq[sq_idx];
1164 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1165
1166 rval = init_initiator_logout_request_task(&task_params,
1167 &logout_pdu_header,
1168 NULL, NULL);
1169 if (rval)
1170 return -1;
1171
1172 spin_lock(&qedi_conn->list_lock);
1173 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1174 qedi_cmd->io_cmd_in_list = true;
1175 qedi_conn->active_cmd_count++;
1176 spin_unlock(&qedi_conn->list_lock);
1177
1178 qedi_ring_doorbell(qedi_conn);
1179 return 0;
1180 }
1181
1182 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1183 struct iscsi_task *task, bool in_recovery)
1184 {
1185 int rval;
1186 struct iscsi_task *ctask;
1187 struct qedi_cmd *cmd, *cmd_tmp;
1188 struct iscsi_tm *tmf_hdr;
1189 unsigned int lun = 0;
1190 bool lun_reset = false;
1191 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1192 struct iscsi_session *session = conn->session;
1193
1194 /* From recovery, task is NULL or from tmf resp valid task */
1195 if (task) {
1196 tmf_hdr = (struct iscsi_tm *)task->hdr;
1197
1198 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1199 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1200 lun_reset = true;
1201 lun = scsilun_to_int(&tmf_hdr->lun);
1202 }
1203 }
1204
1205 qedi_conn->cmd_cleanup_req = 0;
1206 qedi_conn->cmd_cleanup_cmpl = 0;
1207
1208 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1209 "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1210 qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1211 in_recovery, lun_reset);
1212
1213 if (lun_reset)
1214 spin_lock_bh(&session->back_lock);
1215
1216 spin_lock(&qedi_conn->list_lock);
1217
1218 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1219 io_cmd) {
1220 ctask = cmd->task;
1221 if (ctask == task)
1222 continue;
1223
1224 if (lun_reset) {
1225 if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1226 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1227 "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1228 cmd->task_id, get_itt(ctask->itt),
1229 cmd->scsi_cmd, cmd->scsi_cmd->device,
1230 ctask->state, cmd->state,
1231 qedi_conn->iscsi_conn_id);
1232 if (cmd->scsi_cmd->device->lun != lun)
1233 continue;
1234 }
1235 }
1236 qedi_conn->cmd_cleanup_req++;
1237 qedi_iscsi_cleanup_task(ctask, true);
1238
1239 list_del_init(&cmd->io_cmd);
1240 qedi_conn->active_cmd_count--;
1241 QEDI_WARN(&qedi->dbg_ctx,
1242 "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1243 &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1244 }
1245
1246 spin_unlock(&qedi_conn->list_lock);
1247
1248 if (lun_reset)
1249 spin_unlock_bh(&session->back_lock);
1250
1251 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1252 "cmd_cleanup_req=%d, cid=0x%x\n",
1253 qedi_conn->cmd_cleanup_req,
1254 qedi_conn->iscsi_conn_id);
1255
1256 rval = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1257 ((qedi_conn->cmd_cleanup_req ==
1258 qedi_conn->cmd_cleanup_cmpl) ||
1259 qedi_conn->ep),
1260 5 * HZ);
1261 if (rval) {
1262 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1263 "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1264 qedi_conn->cmd_cleanup_req,
1265 qedi_conn->cmd_cleanup_cmpl,
1266 qedi_conn->iscsi_conn_id);
1267
1268 return 0;
1269 }
1270
1271 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1272 "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1273 qedi_conn->cmd_cleanup_req,
1274 qedi_conn->cmd_cleanup_cmpl,
1275 qedi_conn->iscsi_conn_id);
1276
1277 iscsi_host_for_each_session(qedi->shost,
1278 qedi_mark_device_missing);
1279 qedi_ops->common->drain(qedi->cdev);
1280
1281 /* Enable IOs for all other sessions except current.*/
1282 if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1283 (qedi_conn->cmd_cleanup_req ==
1284 qedi_conn->cmd_cleanup_cmpl),
1285 5 * HZ)) {
1286 iscsi_host_for_each_session(qedi->shost,
1287 qedi_mark_device_available);
1288 return -1;
1289 }
1290
1291 iscsi_host_for_each_session(qedi->shost,
1292 qedi_mark_device_available);
1293
1294 return 0;
1295 }
1296
1297 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1298 struct iscsi_task *task)
1299 {
1300 struct qedi_endpoint *qedi_ep;
1301 int rval;
1302
1303 qedi_ep = qedi_conn->ep;
1304 qedi_conn->cmd_cleanup_req = 0;
1305 qedi_conn->cmd_cleanup_cmpl = 0;
1306
1307 if (!qedi_ep) {
1308 QEDI_WARN(&qedi->dbg_ctx,
1309 "Cannot proceed, ep already disconnected, cid=0x%x\n",
1310 qedi_conn->iscsi_conn_id);
1311 return;
1312 }
1313
1314 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1315 "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1316 qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1317
1318 qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1319
1320 rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1321 if (rval) {
1322 QEDI_ERR(&qedi->dbg_ctx,
1323 "fatal error, need hard reset, cid=0x%x\n",
1324 qedi_conn->iscsi_conn_id);
1325 WARN_ON(1);
1326 }
1327 }
1328
1329 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1330 struct qedi_conn *qedi_conn,
1331 struct iscsi_task *task,
1332 struct qedi_cmd *qedi_cmd,
1333 struct qedi_work_map *list_work)
1334 {
1335 struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1336 int wait;
1337
1338 wait = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1339 ((qedi_cmd->state ==
1340 CLEANUP_RECV) ||
1341 ((qedi_cmd->type == TYPEIO) &&
1342 (cmd->state ==
1343 RESPONSE_RECEIVED))),
1344 5 * HZ);
1345 if (!wait) {
1346 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1347
1348 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1349 "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1350 cmd->task_id, qedi_conn->iscsi_conn_id);
1351
1352 return -1;
1353 }
1354 return 0;
1355 }
1356
1357 static void qedi_tmf_work(struct work_struct *work)
1358 {
1359 struct qedi_cmd *qedi_cmd =
1360 container_of(work, struct qedi_cmd, tmf_work);
1361 struct qedi_conn *qedi_conn = qedi_cmd->conn;
1362 struct qedi_ctx *qedi = qedi_conn->qedi;
1363 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1364 struct qedi_work_map *list_work = NULL;
1365 struct iscsi_task *mtask;
1366 struct qedi_cmd *cmd;
1367 struct iscsi_task *ctask;
1368 struct iscsi_tm *tmf_hdr;
1369 s16 rval = 0;
1370 s16 tid = 0;
1371
1372 mtask = qedi_cmd->task;
1373 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1374 set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1375
1376 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1377 if (!ctask || !ctask->sc) {
1378 QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
1379 goto abort_ret;
1380 }
1381
1382 cmd = (struct qedi_cmd *)ctask->dd_data;
1383 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1384 "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1385 get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1386 qedi_conn->iscsi_conn_id);
1387
1388 if (qedi_do_not_recover) {
1389 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1390 qedi_do_not_recover);
1391 goto abort_ret;
1392 }
1393
1394 list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
1395 if (!list_work) {
1396 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1397 goto abort_ret;
1398 }
1399
1400 qedi_cmd->type = TYPEIO;
1401 list_work->qedi_cmd = qedi_cmd;
1402 list_work->rtid = cmd->task_id;
1403 list_work->state = QEDI_WORK_SCHEDULED;
1404 qedi_cmd->list_tmf_work = list_work;
1405
1406 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1407 "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1408 list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1409 tmf_hdr->flags);
1410
1411 spin_lock_bh(&qedi_conn->tmf_work_lock);
1412 list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1413 spin_unlock_bh(&qedi_conn->tmf_work_lock);
1414
1415 qedi_iscsi_cleanup_task(ctask, false);
1416
1417 rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1418 list_work);
1419 if (rval == -1) {
1420 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1421 "FW cleanup got escalated, cid=0x%x\n",
1422 qedi_conn->iscsi_conn_id);
1423 goto ldel_exit;
1424 }
1425
1426 tid = qedi_get_task_idx(qedi);
1427 if (tid == -1) {
1428 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1429 qedi_conn->iscsi_conn_id);
1430 goto ldel_exit;
1431 }
1432
1433 qedi_cmd->task_id = tid;
1434 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1435
1436 abort_ret:
1437 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1438 return;
1439
1440 ldel_exit:
1441 spin_lock_bh(&qedi_conn->tmf_work_lock);
1442 if (!qedi_cmd->list_tmf_work) {
1443 list_del_init(&list_work->list);
1444 qedi_cmd->list_tmf_work = NULL;
1445 kfree(list_work);
1446 }
1447 spin_unlock_bh(&qedi_conn->tmf_work_lock);
1448
1449 spin_lock(&qedi_conn->list_lock);
1450 list_del_init(&cmd->io_cmd);
1451 qedi_conn->active_cmd_count--;
1452 spin_unlock(&qedi_conn->list_lock);
1453
1454 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1455 }
1456
1457 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
1458 struct iscsi_task *mtask)
1459 {
1460 struct iscsi_tmf_request_hdr tmf_pdu_header;
1461 struct iscsi_task_params task_params;
1462 struct qedi_ctx *qedi = qedi_conn->qedi;
1463 struct e4_iscsi_task_context *fw_task_ctx;
1464 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1465 struct iscsi_task *ctask;
1466 struct iscsi_tm *tmf_hdr;
1467 struct qedi_cmd *qedi_cmd;
1468 struct qedi_cmd *cmd;
1469 struct qedi_endpoint *ep;
1470 u32 scsi_lun[2];
1471 s16 tid = 0;
1472 u16 sq_idx = 0;
1473 int rval = 0;
1474
1475 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1476 qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1477 ep = qedi_conn->ep;
1478 if (!ep)
1479 return -ENODEV;
1480
1481 tid = qedi_get_task_idx(qedi);
1482 if (tid == -1)
1483 return -ENOMEM;
1484
1485 fw_task_ctx =
1486 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1487 tid);
1488 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1489
1490 qedi_cmd->task_id = tid;
1491
1492 memset(&task_params, 0, sizeof(task_params));
1493 memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1494
1495 /* Update header info */
1496 qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1497 tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1498 tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1499
1500 memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1501 tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1502 tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1503
1504 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1505 ISCSI_TM_FUNC_ABORT_TASK) {
1506 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1507 if (!ctask || !ctask->sc) {
1508 QEDI_ERR(&qedi->dbg_ctx,
1509 "Could not get reference task\n");
1510 return 0;
1511 }
1512 cmd = (struct qedi_cmd *)ctask->dd_data;
1513 tmf_pdu_header.rtt =
1514 qedi_set_itt(cmd->task_id,
1515 get_itt(tmf_hdr->rtt));
1516 } else {
1517 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1518 }
1519
1520 tmf_pdu_header.opcode = tmf_hdr->opcode;
1521 tmf_pdu_header.function = tmf_hdr->flags;
1522 tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1523 tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1524
1525 /* Fill fw input params */
1526 task_params.context = fw_task_ctx;
1527 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1528 task_params.itid = tid;
1529 task_params.cq_rss_number = 0;
1530 task_params.tx_io_size = 0;
1531 task_params.rx_io_size = 0;
1532
1533 sq_idx = qedi_get_wqe_idx(qedi_conn);
1534 task_params.sqe = &ep->sq[sq_idx];
1535
1536 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1537 rval = init_initiator_tmf_request_task(&task_params,
1538 &tmf_pdu_header);
1539 if (rval)
1540 return -1;
1541
1542 spin_lock(&qedi_conn->list_lock);
1543 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1544 qedi_cmd->io_cmd_in_list = true;
1545 qedi_conn->active_cmd_count++;
1546 spin_unlock(&qedi_conn->list_lock);
1547
1548 qedi_ring_doorbell(qedi_conn);
1549 return 0;
1550 }
1551
1552 int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
1553 struct iscsi_task *mtask)
1554 {
1555 struct qedi_ctx *qedi = qedi_conn->qedi;
1556 struct iscsi_tm *tmf_hdr;
1557 struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1558 s16 tid = 0;
1559
1560 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1561 qedi_cmd->task = mtask;
1562
1563 /* If abort task then schedule the work and return */
1564 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1565 ISCSI_TM_FUNC_ABORT_TASK) {
1566 qedi_cmd->state = CLEANUP_WAIT;
1567 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
1568 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1569
1570 } else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1571 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
1572 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1573 ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
1574 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1575 ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
1576 tid = qedi_get_task_idx(qedi);
1577 if (tid == -1) {
1578 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1579 qedi_conn->iscsi_conn_id);
1580 return -1;
1581 }
1582 qedi_cmd->task_id = tid;
1583
1584 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1585
1586 } else {
1587 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1588 qedi_conn->iscsi_conn_id);
1589 return -1;
1590 }
1591
1592 return 0;
1593 }
1594
1595 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1596 struct iscsi_task *task)
1597 {
1598 struct iscsi_text_request_hdr text_request_pdu_header;
1599 struct scsi_sgl_task_params tx_sgl_task_params;
1600 struct scsi_sgl_task_params rx_sgl_task_params;
1601 struct iscsi_task_params task_params;
1602 struct e4_iscsi_task_context *fw_task_ctx;
1603 struct qedi_ctx *qedi = qedi_conn->qedi;
1604 struct iscsi_text *text_hdr;
1605 struct scsi_sge *req_sge = NULL;
1606 struct scsi_sge *resp_sge = NULL;
1607 struct qedi_cmd *qedi_cmd;
1608 struct qedi_endpoint *ep;
1609 s16 tid = 0;
1610 u16 sq_idx = 0;
1611 int rval = 0;
1612
1613 req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1614 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1615 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1616 text_hdr = (struct iscsi_text *)task->hdr;
1617 ep = qedi_conn->ep;
1618
1619 tid = qedi_get_task_idx(qedi);
1620 if (tid == -1)
1621 return -ENOMEM;
1622
1623 fw_task_ctx =
1624 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1625 tid);
1626 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1627
1628 qedi_cmd->task_id = tid;
1629
1630 memset(&task_params, 0, sizeof(task_params));
1631 memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1632 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1633 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1634
1635 /* Update header info */
1636 text_request_pdu_header.opcode = text_hdr->opcode;
1637 text_request_pdu_header.flags_attr = text_hdr->flags;
1638
1639 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1640 text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1641 text_request_pdu_header.ttt = text_hdr->ttt;
1642 text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1643 text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1644 text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1645
1646 /* Fill tx AHS and rx buffer */
1647 tx_sgl_task_params.sgl =
1648 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1649 tx_sgl_task_params.sgl_phys_addr.lo =
1650 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1651 tx_sgl_task_params.sgl_phys_addr.hi =
1652 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1653 tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1654 tx_sgl_task_params.num_sges = 1;
1655
1656 rx_sgl_task_params.sgl =
1657 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1658 rx_sgl_task_params.sgl_phys_addr.lo =
1659 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1660 rx_sgl_task_params.sgl_phys_addr.hi =
1661 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1662 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1663 rx_sgl_task_params.num_sges = 1;
1664
1665 /* Fill fw input params */
1666 task_params.context = fw_task_ctx;
1667 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1668 task_params.itid = tid;
1669 task_params.cq_rss_number = 0;
1670 task_params.tx_io_size = ntoh24(text_hdr->dlength);
1671 task_params.rx_io_size = resp_sge->sge_len;
1672
1673 sq_idx = qedi_get_wqe_idx(qedi_conn);
1674 task_params.sqe = &ep->sq[sq_idx];
1675
1676 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1677 rval = init_initiator_text_request_task(&task_params,
1678 &text_request_pdu_header,
1679 &tx_sgl_task_params,
1680 &rx_sgl_task_params);
1681 if (rval)
1682 return -1;
1683
1684 spin_lock(&qedi_conn->list_lock);
1685 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1686 qedi_cmd->io_cmd_in_list = true;
1687 qedi_conn->active_cmd_count++;
1688 spin_unlock(&qedi_conn->list_lock);
1689
1690 qedi_ring_doorbell(qedi_conn);
1691 return 0;
1692 }
1693
1694 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1695 struct iscsi_task *task,
1696 char *datap, int data_len, int unsol)
1697 {
1698 struct iscsi_nop_out_hdr nop_out_pdu_header;
1699 struct scsi_sgl_task_params tx_sgl_task_params;
1700 struct scsi_sgl_task_params rx_sgl_task_params;
1701 struct iscsi_task_params task_params;
1702 struct qedi_ctx *qedi = qedi_conn->qedi;
1703 struct e4_iscsi_task_context *fw_task_ctx;
1704 struct iscsi_nopout *nopout_hdr;
1705 struct scsi_sge *resp_sge = NULL;
1706 struct qedi_cmd *qedi_cmd;
1707 struct qedi_endpoint *ep;
1708 u32 scsi_lun[2];
1709 s16 tid = 0;
1710 u16 sq_idx = 0;
1711 int rval = 0;
1712
1713 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1714 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1715 nopout_hdr = (struct iscsi_nopout *)task->hdr;
1716 ep = qedi_conn->ep;
1717
1718 tid = qedi_get_task_idx(qedi);
1719 if (tid == -1)
1720 return -ENOMEM;
1721
1722 fw_task_ctx =
1723 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1724 tid);
1725 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1726
1727 qedi_cmd->task_id = tid;
1728
1729 memset(&task_params, 0, sizeof(task_params));
1730 memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1731 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1732 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1733
1734 /* Update header info */
1735 nop_out_pdu_header.opcode = nopout_hdr->opcode;
1736 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1737 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1738
1739 memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1740 nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1741 nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1742 nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1743 nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1744
1745 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1746
1747 if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1748 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1749 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1750 } else {
1751 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1752 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1753
1754 spin_lock(&qedi_conn->list_lock);
1755 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1756 qedi_cmd->io_cmd_in_list = true;
1757 qedi_conn->active_cmd_count++;
1758 spin_unlock(&qedi_conn->list_lock);
1759 }
1760
1761 /* Fill tx AHS and rx buffer */
1762 if (data_len) {
1763 tx_sgl_task_params.sgl =
1764 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1765 tx_sgl_task_params.sgl_phys_addr.lo =
1766 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1767 tx_sgl_task_params.sgl_phys_addr.hi =
1768 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1769 tx_sgl_task_params.total_buffer_size = data_len;
1770 tx_sgl_task_params.num_sges = 1;
1771
1772 rx_sgl_task_params.sgl =
1773 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1774 rx_sgl_task_params.sgl_phys_addr.lo =
1775 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1776 rx_sgl_task_params.sgl_phys_addr.hi =
1777 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1778 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1779 rx_sgl_task_params.num_sges = 1;
1780 }
1781
1782 /* Fill fw input params */
1783 task_params.context = fw_task_ctx;
1784 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1785 task_params.itid = tid;
1786 task_params.cq_rss_number = 0;
1787 task_params.tx_io_size = data_len;
1788 task_params.rx_io_size = resp_sge->sge_len;
1789
1790 sq_idx = qedi_get_wqe_idx(qedi_conn);
1791 task_params.sqe = &ep->sq[sq_idx];
1792
1793 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1794 rval = init_initiator_nop_out_task(&task_params,
1795 &nop_out_pdu_header,
1796 &tx_sgl_task_params,
1797 &rx_sgl_task_params);
1798 if (rval)
1799 return -1;
1800
1801 qedi_ring_doorbell(qedi_conn);
1802 return 0;
1803 }
1804
1805 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1806 int bd_index)
1807 {
1808 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1809 int frag_size, sg_frags;
1810
1811 sg_frags = 0;
1812
1813 while (sg_len) {
1814 if (addr % QEDI_PAGE_SIZE)
1815 frag_size =
1816 (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1817 else
1818 frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1819 (sg_len % QEDI_BD_SPLIT_SZ);
1820
1821 if (frag_size == 0)
1822 frag_size = QEDI_BD_SPLIT_SZ;
1823
1824 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1825 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1826 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1827 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1828 "split sge %d: addr=%llx, len=%x",
1829 (bd_index + sg_frags), addr, frag_size);
1830
1831 addr += (u64)frag_size;
1832 sg_frags++;
1833 sg_len -= frag_size;
1834 }
1835 return sg_frags;
1836 }
1837
1838 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1839 {
1840 struct scsi_cmnd *sc = cmd->scsi_cmd;
1841 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1842 struct scatterlist *sg;
1843 int byte_count = 0;
1844 int bd_count = 0;
1845 int sg_count;
1846 int sg_len;
1847 int sg_frags;
1848 u64 addr, end_addr;
1849 int i;
1850
1851 WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1852
1853 sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1854 scsi_sg_count(sc), sc->sc_data_direction);
1855
1856 /*
1857 * New condition to send single SGE as cached-SGL.
1858 * Single SGE with length less than 64K.
1859 */
1860 sg = scsi_sglist(sc);
1861 if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1862 sg_len = sg_dma_len(sg);
1863 addr = (u64)sg_dma_address(sg);
1864
1865 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1866 bd[bd_count].sge_addr.hi = (addr >> 32);
1867 bd[bd_count].sge_len = (u16)sg_len;
1868
1869 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1870 "single-cached-sgl: bd_count:%d addr=%llx, len=%x",
1871 sg_count, addr, sg_len);
1872
1873 return ++bd_count;
1874 }
1875
1876 scsi_for_each_sg(sc, sg, sg_count, i) {
1877 sg_len = sg_dma_len(sg);
1878 addr = (u64)sg_dma_address(sg);
1879 end_addr = (addr + sg_len);
1880
1881 /*
1882 * first sg elem in the 'list',
1883 * check if end addr is page-aligned.
1884 */
1885 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1886 cmd->use_slowpath = true;
1887
1888 /*
1889 * last sg elem in the 'list',
1890 * check if start addr is page-aligned.
1891 */
1892 else if ((i == (sg_count - 1)) &&
1893 (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1894 cmd->use_slowpath = true;
1895
1896 /*
1897 * middle sg elements in list,
1898 * check if start and end addr is page-aligned
1899 */
1900 else if ((i != 0) && (i != (sg_count - 1)) &&
1901 ((addr % QEDI_PAGE_SIZE) ||
1902 (end_addr % QEDI_PAGE_SIZE)))
1903 cmd->use_slowpath = true;
1904
1905 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1906 i, sg_len);
1907
1908 if (sg_len > QEDI_BD_SPLIT_SZ) {
1909 sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1910 } else {
1911 sg_frags = 1;
1912 bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1913 bd[bd_count].sge_addr.hi = addr >> 32;
1914 bd[bd_count].sge_len = sg_len;
1915 }
1916 byte_count += sg_len;
1917 bd_count += sg_frags;
1918 }
1919
1920 if (byte_count != scsi_bufflen(sc))
1921 QEDI_ERR(&qedi->dbg_ctx,
1922 "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1923 scsi_bufflen(sc));
1924 else
1925 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1926 byte_count);
1927
1928 WARN_ON(byte_count != scsi_bufflen(sc));
1929
1930 return bd_count;
1931 }
1932
1933 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1934 {
1935 int bd_count;
1936 struct scsi_cmnd *sc = cmd->scsi_cmd;
1937
1938 if (scsi_sg_count(sc)) {
1939 bd_count = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1940 if (bd_count == 0)
1941 return;
1942 } else {
1943 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1944
1945 bd[0].sge_addr.lo = 0;
1946 bd[0].sge_addr.hi = 0;
1947 bd[0].sge_len = 0;
1948 bd_count = 0;
1949 }
1950 cmd->io_tbl.sge_valid = bd_count;
1951 }
1952
1953 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1954 {
1955 u32 dword;
1956 int lpcnt;
1957 u8 *srcp;
1958
1959 lpcnt = sc->cmd_len / sizeof(dword);
1960 srcp = (u8 *)sc->cmnd;
1961 while (lpcnt--) {
1962 memcpy(&dword, (const void *)srcp, 4);
1963 *dstp = cpu_to_be32(dword);
1964 srcp += 4;
1965 dstp++;
1966 }
1967 if (sc->cmd_len & 0x3) {
1968 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1969 *dstp = cpu_to_be32(dword);
1970 }
1971 }
1972
1973 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
1974 u16 tid, int8_t direction)
1975 {
1976 struct qedi_io_log *io_log;
1977 struct iscsi_conn *conn = task->conn;
1978 struct qedi_conn *qedi_conn = conn->dd_data;
1979 struct scsi_cmnd *sc_cmd = task->sc;
1980 unsigned long flags;
1981
1982 spin_lock_irqsave(&qedi->io_trace_lock, flags);
1983
1984 io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
1985 io_log->direction = direction;
1986 io_log->task_id = tid;
1987 io_log->cid = qedi_conn->iscsi_conn_id;
1988 io_log->lun = sc_cmd->device->lun;
1989 io_log->op = sc_cmd->cmnd[0];
1990 io_log->lba[0] = sc_cmd->cmnd[2];
1991 io_log->lba[1] = sc_cmd->cmnd[3];
1992 io_log->lba[2] = sc_cmd->cmnd[4];
1993 io_log->lba[3] = sc_cmd->cmnd[5];
1994 io_log->bufflen = scsi_bufflen(sc_cmd);
1995 io_log->sg_count = scsi_sg_count(sc_cmd);
1996 io_log->fast_sgs = qedi->fast_sgls;
1997 io_log->cached_sgs = qedi->cached_sgls;
1998 io_log->slow_sgs = qedi->slow_sgls;
1999 io_log->cached_sge = qedi->use_cached_sge;
2000 io_log->slow_sge = qedi->use_slow_sge;
2001 io_log->fast_sge = qedi->use_fast_sge;
2002 io_log->result = sc_cmd->result;
2003 io_log->jiffies = jiffies;
2004 io_log->blk_req_cpu = smp_processor_id();
2005
2006 if (direction == QEDI_IO_TRACE_REQ) {
2007 /* For requests we only care about the submission CPU */
2008 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2009 io_log->intr_cpu = 0;
2010 io_log->blk_rsp_cpu = 0;
2011 } else if (direction == QEDI_IO_TRACE_RSP) {
2012 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2013 io_log->intr_cpu = qedi->intr_cpu;
2014 io_log->blk_rsp_cpu = smp_processor_id();
2015 }
2016
2017 qedi->io_trace_idx++;
2018 if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
2019 qedi->io_trace_idx = 0;
2020
2021 qedi->use_cached_sge = false;
2022 qedi->use_slow_sge = false;
2023 qedi->use_fast_sge = false;
2024
2025 spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
2026 }
2027
2028 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
2029 {
2030 struct iscsi_conn *conn = task->conn;
2031 struct iscsi_session *session = conn->session;
2032 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
2033 struct qedi_ctx *qedi = iscsi_host_priv(shost);
2034 struct qedi_conn *qedi_conn = conn->dd_data;
2035 struct qedi_cmd *cmd = task->dd_data;
2036 struct scsi_cmnd *sc = task->sc;
2037 struct iscsi_cmd_hdr cmd_pdu_header;
2038 struct scsi_sgl_task_params tx_sgl_task_params;
2039 struct scsi_sgl_task_params rx_sgl_task_params;
2040 struct scsi_sgl_task_params *prx_sgl = NULL;
2041 struct scsi_sgl_task_params *ptx_sgl = NULL;
2042 struct iscsi_task_params task_params;
2043 struct iscsi_conn_params conn_params;
2044 struct scsi_initiator_cmd_params cmd_params;
2045 struct e4_iscsi_task_context *fw_task_ctx;
2046 struct iscsi_cls_conn *cls_conn;
2047 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
2048 enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
2049 struct qedi_endpoint *ep;
2050 u32 scsi_lun[2];
2051 s16 tid = 0;
2052 u16 sq_idx = 0;
2053 u16 cq_idx;
2054 int rval = 0;
2055
2056 ep = qedi_conn->ep;
2057 cls_conn = qedi_conn->cls_conn;
2058 conn = cls_conn->dd_data;
2059
2060 qedi_iscsi_map_sg_list(cmd);
2061 int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2062
2063 tid = qedi_get_task_idx(qedi);
2064 if (tid == -1)
2065 return -ENOMEM;
2066
2067 fw_task_ctx =
2068 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2069 tid);
2070 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
2071
2072 cmd->task_id = tid;
2073
2074 memset(&task_params, 0, sizeof(task_params));
2075 memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2076 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2077 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2078 memset(&conn_params, 0, sizeof(conn_params));
2079 memset(&cmd_params, 0, sizeof(cmd_params));
2080
2081 cq_idx = smp_processor_id() % qedi->num_queues;
2082 /* Update header info */
2083 SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2084 ISCSI_ATTR_SIMPLE);
2085 if (hdr->cdb[0] != TEST_UNIT_READY) {
2086 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2087 SET_FIELD(cmd_pdu_header.flags_attr,
2088 ISCSI_CMD_HDR_WRITE, 1);
2089 task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2090 } else {
2091 SET_FIELD(cmd_pdu_header.flags_attr,
2092 ISCSI_CMD_HDR_READ, 1);
2093 task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2094 }
2095 }
2096
2097 cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2098 cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2099
2100 qedi_update_itt_map(qedi, tid, task->itt, cmd);
2101 cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2102 cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2103 cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2104 cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2105 cmd_pdu_header.hdr_first_byte = hdr->opcode;
2106 qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2107
2108 /* Fill tx AHS and rx buffer */
2109 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2110 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2111 tx_sgl_task_params.sgl_phys_addr.lo =
2112 (u32)(cmd->io_tbl.sge_tbl_dma);
2113 tx_sgl_task_params.sgl_phys_addr.hi =
2114 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2115 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2116 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2117 if (cmd->use_slowpath)
2118 tx_sgl_task_params.small_mid_sge = true;
2119 } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2120 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2121 rx_sgl_task_params.sgl_phys_addr.lo =
2122 (u32)(cmd->io_tbl.sge_tbl_dma);
2123 rx_sgl_task_params.sgl_phys_addr.hi =
2124 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2125 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2126 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2127 }
2128
2129 /* Add conn param */
2130 conn_params.first_burst_length = conn->session->first_burst;
2131 conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2132 conn_params.max_burst_length = conn->session->max_burst;
2133 if (conn->session->initial_r2t_en)
2134 conn_params.initial_r2t = true;
2135 if (conn->session->imm_data_en)
2136 conn_params.immediate_data = true;
2137
2138 /* Add cmd params */
2139 cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2140 cmd_params.sense_data_buffer_phys_addr.hi =
2141 (u32)((u64)cmd->sense_buffer_dma >> 32);
2142 /* Fill fw input params */
2143 task_params.context = fw_task_ctx;
2144 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2145 task_params.itid = tid;
2146 task_params.cq_rss_number = cq_idx;
2147 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2148 task_params.tx_io_size = scsi_bufflen(sc);
2149 else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2150 task_params.rx_io_size = scsi_bufflen(sc);
2151
2152 sq_idx = qedi_get_wqe_idx(qedi_conn);
2153 task_params.sqe = &ep->sq[sq_idx];
2154
2155 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2156 "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2157 (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2158 "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2159 "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2160 (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2161 (u32)(cmd->io_tbl.sge_tbl_dma),
2162 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2163
2164 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2165
2166 if (task_params.tx_io_size != 0)
2167 ptx_sgl = &tx_sgl_task_params;
2168 if (task_params.rx_io_size != 0)
2169 prx_sgl = &rx_sgl_task_params;
2170
2171 rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2172 &cmd_params, &cmd_pdu_header,
2173 ptx_sgl, prx_sgl,
2174 NULL);
2175 if (rval)
2176 return -1;
2177
2178 spin_lock(&qedi_conn->list_lock);
2179 list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2180 cmd->io_cmd_in_list = true;
2181 qedi_conn->active_cmd_count++;
2182 spin_unlock(&qedi_conn->list_lock);
2183
2184 qedi_ring_doorbell(qedi_conn);
2185 return 0;
2186 }
2187
2188 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2189 {
2190 struct iscsi_task_params task_params;
2191 struct qedi_endpoint *ep;
2192 struct iscsi_conn *conn = task->conn;
2193 struct qedi_conn *qedi_conn = conn->dd_data;
2194 struct qedi_cmd *cmd = task->dd_data;
2195 u16 sq_idx = 0;
2196 int rval = 0;
2197
2198 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2199 "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2200 cmd->task_id, get_itt(task->itt), task->state,
2201 cmd->state, qedi_conn->iscsi_conn_id);
2202
2203 memset(&task_params, 0, sizeof(task_params));
2204 ep = qedi_conn->ep;
2205
2206 sq_idx = qedi_get_wqe_idx(qedi_conn);
2207
2208 task_params.sqe = &ep->sq[sq_idx];
2209 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2210 task_params.itid = cmd->task_id;
2211
2212 rval = init_cleanup_task(&task_params);
2213 if (rval)
2214 return rval;
2215
2216 qedi_ring_doorbell(qedi_conn);
2217 return 0;
2218 }
Linux with added FPC-III support