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[mirror_ubuntu-artful-kernel.git] / drivers / scsi / qedi / qedi_fw.c
1 /*
2 * QLogic iSCSI Offload Driver
3 * Copyright (c) 2016 Cavium Inc.
4 *
5 * This software is available under the terms of the GNU General Public License
6 * (GPL) Version 2, available from the file COPYING in the main directory of
7 * this source tree.
8 */
9
10 #include <linux/blkdev.h>
11 #include <scsi/scsi_tcq.h>
12 #include <linux/delay.h>
13
14 #include "qedi.h"
15 #include "qedi_iscsi.h"
16 #include "qedi_gbl.h"
17 #include "qedi_fw_iscsi.h"
18 #include "qedi_fw_scsi.h"
19
20 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
21 struct iscsi_task *mtask);
22
23 void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
24 {
25 struct scsi_cmnd *sc = cmd->scsi_cmd;
26
27 if (cmd->io_tbl.sge_valid && sc) {
28 cmd->io_tbl.sge_valid = 0;
29 scsi_dma_unmap(sc);
30 }
31 }
32
33 static void qedi_process_logout_resp(struct qedi_ctx *qedi,
34 union iscsi_cqe *cqe,
35 struct iscsi_task *task,
36 struct qedi_conn *qedi_conn)
37 {
38 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
39 struct iscsi_logout_rsp *resp_hdr;
40 struct iscsi_session *session = conn->session;
41 struct iscsi_logout_response_hdr *cqe_logout_response;
42 struct qedi_cmd *cmd;
43
44 cmd = (struct qedi_cmd *)task->dd_data;
45 cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
46 spin_lock(&session->back_lock);
47 resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
48 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
49 resp_hdr->opcode = cqe_logout_response->opcode;
50 resp_hdr->flags = cqe_logout_response->flags;
51 resp_hdr->hlength = 0;
52
53 resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
54 resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
55 resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
56 resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
57
58 resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time_2_wait);
59 resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time_2_retain);
60
61 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
62 "Freeing tid=0x%x for cid=0x%x\n",
63 cmd->task_id, qedi_conn->iscsi_conn_id);
64
65 if (likely(cmd->io_cmd_in_list)) {
66 cmd->io_cmd_in_list = false;
67 list_del_init(&cmd->io_cmd);
68 qedi_conn->active_cmd_count--;
69 } else {
70 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
71 "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
72 cmd->task_id, qedi_conn->iscsi_conn_id,
73 &cmd->io_cmd);
74 }
75
76 cmd->state = RESPONSE_RECEIVED;
77 qedi_clear_task_idx(qedi, cmd->task_id);
78 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
79
80 spin_unlock(&session->back_lock);
81 }
82
83 static void qedi_process_text_resp(struct qedi_ctx *qedi,
84 union iscsi_cqe *cqe,
85 struct iscsi_task *task,
86 struct qedi_conn *qedi_conn)
87 {
88 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
89 struct iscsi_session *session = conn->session;
90 struct iscsi_task_context *task_ctx;
91 struct iscsi_text_rsp *resp_hdr_ptr;
92 struct iscsi_text_response_hdr *cqe_text_response;
93 struct qedi_cmd *cmd;
94 int pld_len;
95 u32 *tmp;
96
97 cmd = (struct qedi_cmd *)task->dd_data;
98 task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
99
100 cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
101 spin_lock(&session->back_lock);
102 resp_hdr_ptr = (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
103 memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
104 resp_hdr_ptr->opcode = cqe_text_response->opcode;
105 resp_hdr_ptr->flags = cqe_text_response->flags;
106 resp_hdr_ptr->hlength = 0;
107
108 hton24(resp_hdr_ptr->dlength,
109 (cqe_text_response->hdr_second_dword &
110 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
111 tmp = (u32 *)resp_hdr_ptr->dlength;
112
113 resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
114 conn->session->age);
115 resp_hdr_ptr->ttt = cqe_text_response->ttt;
116 resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
117 resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
118 resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
119
120 pld_len = cqe_text_response->hdr_second_dword &
121 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
122 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
123
124 memset(task_ctx, '\0', sizeof(*task_ctx));
125
126 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
127 "Freeing tid=0x%x for cid=0x%x\n",
128 cmd->task_id, qedi_conn->iscsi_conn_id);
129
130 if (likely(cmd->io_cmd_in_list)) {
131 cmd->io_cmd_in_list = false;
132 list_del_init(&cmd->io_cmd);
133 qedi_conn->active_cmd_count--;
134 } else {
135 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
136 "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
137 cmd->task_id, qedi_conn->iscsi_conn_id,
138 &cmd->io_cmd);
139 }
140
141 cmd->state = RESPONSE_RECEIVED;
142 qedi_clear_task_idx(qedi, cmd->task_id);
143
144 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
145 qedi_conn->gen_pdu.resp_buf,
146 (qedi_conn->gen_pdu.resp_wr_ptr -
147 qedi_conn->gen_pdu.resp_buf));
148 spin_unlock(&session->back_lock);
149 }
150
151 static void qedi_tmf_resp_work(struct work_struct *work)
152 {
153 struct qedi_cmd *qedi_cmd =
154 container_of(work, struct qedi_cmd, tmf_work);
155 struct qedi_conn *qedi_conn = qedi_cmd->conn;
156 struct qedi_ctx *qedi = qedi_conn->qedi;
157 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
158 struct iscsi_session *session = conn->session;
159 struct iscsi_tm_rsp *resp_hdr_ptr;
160 struct iscsi_cls_session *cls_sess;
161 int rval = 0;
162
163 set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
164 resp_hdr_ptr = (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
165 cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
166
167 iscsi_block_session(session->cls_session);
168 rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
169 if (rval) {
170 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
171 iscsi_unblock_session(session->cls_session);
172 goto exit_tmf_resp;
173 }
174
175 iscsi_unblock_session(session->cls_session);
176 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
177
178 spin_lock(&session->back_lock);
179 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
180 spin_unlock(&session->back_lock);
181
182 exit_tmf_resp:
183 kfree(resp_hdr_ptr);
184 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
185 }
186
187 static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
188 union iscsi_cqe *cqe,
189 struct iscsi_task *task,
190 struct qedi_conn *qedi_conn)
191
192 {
193 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
194 struct iscsi_session *session = conn->session;
195 struct iscsi_tmf_response_hdr *cqe_tmp_response;
196 struct iscsi_tm_rsp *resp_hdr_ptr;
197 struct iscsi_tm *tmf_hdr;
198 struct qedi_cmd *qedi_cmd = NULL;
199 u32 *tmp;
200
201 cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
202
203 qedi_cmd = task->dd_data;
204 qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_KERNEL);
205 if (!qedi_cmd->tmf_resp_buf) {
206 QEDI_ERR(&qedi->dbg_ctx,
207 "Failed to allocate resp buf, cid=0x%x\n",
208 qedi_conn->iscsi_conn_id);
209 return;
210 }
211
212 spin_lock(&session->back_lock);
213 resp_hdr_ptr = (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
214 memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
215
216 /* Fill up the header */
217 resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
218 resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
219 resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
220 resp_hdr_ptr->hlength = 0;
221
222 hton24(resp_hdr_ptr->dlength,
223 (cqe_tmp_response->hdr_second_dword &
224 ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
225 tmp = (u32 *)resp_hdr_ptr->dlength;
226 resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
227 conn->session->age);
228 resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
229 resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
230 resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
231
232 tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
233
234 if (likely(qedi_cmd->io_cmd_in_list)) {
235 qedi_cmd->io_cmd_in_list = false;
236 list_del_init(&qedi_cmd->io_cmd);
237 qedi_conn->active_cmd_count--;
238 }
239
240 if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
241 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
242 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
243 ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
244 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
245 ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
246 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
247 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
248 goto unblock_sess;
249 }
250
251 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
252
253 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
254 kfree(resp_hdr_ptr);
255
256 unblock_sess:
257 spin_unlock(&session->back_lock);
258 }
259
260 static void qedi_process_login_resp(struct qedi_ctx *qedi,
261 union iscsi_cqe *cqe,
262 struct iscsi_task *task,
263 struct qedi_conn *qedi_conn)
264 {
265 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
266 struct iscsi_session *session = conn->session;
267 struct iscsi_task_context *task_ctx;
268 struct iscsi_login_rsp *resp_hdr_ptr;
269 struct iscsi_login_response_hdr *cqe_login_response;
270 struct qedi_cmd *cmd;
271 int pld_len;
272 u32 *tmp;
273
274 cmd = (struct qedi_cmd *)task->dd_data;
275
276 cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
277 task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
278
279 spin_lock(&session->back_lock);
280 resp_hdr_ptr = (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
281 memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
282 resp_hdr_ptr->opcode = cqe_login_response->opcode;
283 resp_hdr_ptr->flags = cqe_login_response->flags_attr;
284 resp_hdr_ptr->hlength = 0;
285
286 hton24(resp_hdr_ptr->dlength,
287 (cqe_login_response->hdr_second_dword &
288 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
289 tmp = (u32 *)resp_hdr_ptr->dlength;
290 resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
291 conn->session->age);
292 resp_hdr_ptr->tsih = cqe_login_response->tsih;
293 resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
294 resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
295 resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
296 resp_hdr_ptr->status_class = cqe_login_response->status_class;
297 resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
298 pld_len = cqe_login_response->hdr_second_dword &
299 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
300 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
301
302 if (likely(cmd->io_cmd_in_list)) {
303 cmd->io_cmd_in_list = false;
304 list_del_init(&cmd->io_cmd);
305 qedi_conn->active_cmd_count--;
306 }
307
308 memset(task_ctx, '\0', sizeof(*task_ctx));
309
310 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
311 qedi_conn->gen_pdu.resp_buf,
312 (qedi_conn->gen_pdu.resp_wr_ptr -
313 qedi_conn->gen_pdu.resp_buf));
314
315 spin_unlock(&session->back_lock);
316 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
317 "Freeing tid=0x%x for cid=0x%x\n",
318 cmd->task_id, qedi_conn->iscsi_conn_id);
319 cmd->state = RESPONSE_RECEIVED;
320 qedi_clear_task_idx(qedi, cmd->task_id);
321 }
322
323 static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
324 struct iscsi_cqe_unsolicited *cqe,
325 char *ptr, int len)
326 {
327 u16 idx = 0;
328
329 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
330 "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
331 len, qedi->bdq_prod_idx,
332 (qedi->bdq_prod_idx % qedi->rq_num_entries));
333
334 /* Obtain buffer address from rqe_opaque */
335 idx = cqe->rqe_opaque.lo;
336 if (idx > (QEDI_BDQ_NUM - 1)) {
337 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
338 "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
339 idx);
340 return;
341 }
342
343 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
344 "rqe_opaque.lo [0x%p], rqe_opaque.hi [0x%p], idx [%d]\n",
345 cqe->rqe_opaque.lo, cqe->rqe_opaque.hi, idx);
346
347 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
348 "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
349 switch (cqe->unsol_cqe_type) {
350 case ISCSI_CQE_UNSOLICITED_SINGLE:
351 case ISCSI_CQE_UNSOLICITED_FIRST:
352 if (len)
353 memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
354 break;
355 case ISCSI_CQE_UNSOLICITED_MIDDLE:
356 case ISCSI_CQE_UNSOLICITED_LAST:
357 break;
358 default:
359 break;
360 }
361 }
362
363 static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
364 struct iscsi_cqe_unsolicited *cqe,
365 int count)
366 {
367 u16 tmp;
368 u16 idx = 0;
369 struct scsi_bd *pbl;
370
371 /* Obtain buffer address from rqe_opaque */
372 idx = cqe->rqe_opaque.lo;
373 if (idx > (QEDI_BDQ_NUM - 1)) {
374 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
375 "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
376 idx);
377 return;
378 }
379
380 pbl = (struct scsi_bd *)qedi->bdq_pbl;
381 pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
382 pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
383 pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
384 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
385 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
386 pbl, pbl->address.hi, pbl->address.lo, idx);
387 pbl->opaque.hi = 0;
388 pbl->opaque.lo = cpu_to_le32(QEDI_U64_LO(idx));
389
390 /* Increment producer to let f/w know we've handled the frame */
391 qedi->bdq_prod_idx += count;
392
393 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
394 tmp = readw(qedi->bdq_primary_prod);
395
396 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
397 tmp = readw(qedi->bdq_secondary_prod);
398 }
399
400 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
401 struct iscsi_cqe_unsolicited *cqe,
402 u32 pdu_len, u32 num_bdqs,
403 char *bdq_data)
404 {
405 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
406 "num_bdqs [%d]\n", num_bdqs);
407
408 qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
409 qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
410 }
411
412 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
413 union iscsi_cqe *cqe,
414 struct iscsi_task *task,
415 struct qedi_conn *qedi_conn, u16 que_idx)
416 {
417 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
418 struct iscsi_session *session = conn->session;
419 struct iscsi_nop_in_hdr *cqe_nop_in;
420 struct iscsi_nopin *hdr;
421 struct qedi_cmd *cmd;
422 int tgt_async_nop = 0;
423 u32 lun[2];
424 u32 pdu_len, num_bdqs;
425 char bdq_data[QEDI_BDQ_BUF_SIZE];
426 unsigned long flags;
427
428 spin_lock_bh(&session->back_lock);
429 cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
430
431 pdu_len = cqe_nop_in->hdr_second_dword &
432 ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
433 num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
434
435 hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
436 memset(hdr, 0, sizeof(struct iscsi_hdr));
437 hdr->opcode = cqe_nop_in->opcode;
438 hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
439 hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
440 hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
441 hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
442
443 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
444 spin_lock_irqsave(&qedi->hba_lock, flags);
445 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
446 pdu_len, num_bdqs, bdq_data);
447 hdr->itt = RESERVED_ITT;
448 tgt_async_nop = 1;
449 spin_unlock_irqrestore(&qedi->hba_lock, flags);
450 goto done;
451 }
452
453 /* Response to one of our nop-outs */
454 if (task) {
455 cmd = task->dd_data;
456 hdr->flags = ISCSI_FLAG_CMD_FINAL;
457 hdr->itt = build_itt(cqe->cqe_solicited.itid,
458 conn->session->age);
459 lun[0] = 0xffffffff;
460 lun[1] = 0xffffffff;
461 memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
462 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
463 "Freeing tid=0x%x for cid=0x%x\n",
464 cmd->task_id, qedi_conn->iscsi_conn_id);
465 cmd->state = RESPONSE_RECEIVED;
466 spin_lock(&qedi_conn->list_lock);
467 if (likely(cmd->io_cmd_in_list)) {
468 cmd->io_cmd_in_list = false;
469 list_del_init(&cmd->io_cmd);
470 qedi_conn->active_cmd_count--;
471 }
472
473 spin_unlock(&qedi_conn->list_lock);
474 qedi_clear_task_idx(qedi, cmd->task_id);
475 }
476
477 done:
478 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
479
480 spin_unlock_bh(&session->back_lock);
481 return tgt_async_nop;
482 }
483
484 static void qedi_process_async_mesg(struct qedi_ctx *qedi,
485 union iscsi_cqe *cqe,
486 struct iscsi_task *task,
487 struct qedi_conn *qedi_conn,
488 u16 que_idx)
489 {
490 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
491 struct iscsi_session *session = conn->session;
492 struct iscsi_async_msg_hdr *cqe_async_msg;
493 struct iscsi_async *resp_hdr;
494 u32 lun[2];
495 u32 pdu_len, num_bdqs;
496 char bdq_data[QEDI_BDQ_BUF_SIZE];
497 unsigned long flags;
498
499 spin_lock_bh(&session->back_lock);
500
501 cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
502 pdu_len = cqe_async_msg->hdr_second_dword &
503 ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
504 num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
505
506 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
507 spin_lock_irqsave(&qedi->hba_lock, flags);
508 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
509 pdu_len, num_bdqs, bdq_data);
510 spin_unlock_irqrestore(&qedi->hba_lock, flags);
511 }
512
513 resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
514 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
515 resp_hdr->opcode = cqe_async_msg->opcode;
516 resp_hdr->flags = 0x80;
517
518 lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
519 lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
520 memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
521 resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
522 resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
523 resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
524
525 resp_hdr->async_event = cqe_async_msg->async_event;
526 resp_hdr->async_vcode = cqe_async_msg->async_vcode;
527
528 resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
529 resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
530 resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
531
532 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
533 pdu_len);
534
535 spin_unlock_bh(&session->back_lock);
536 }
537
538 static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
539 union iscsi_cqe *cqe,
540 struct iscsi_task *task,
541 struct qedi_conn *qedi_conn,
542 uint16_t que_idx)
543 {
544 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
545 struct iscsi_session *session = conn->session;
546 struct iscsi_reject_hdr *cqe_reject;
547 struct iscsi_reject *hdr;
548 u32 pld_len, num_bdqs;
549 unsigned long flags;
550
551 spin_lock_bh(&session->back_lock);
552 cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
553 pld_len = cqe_reject->hdr_second_dword &
554 ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
555 num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
556
557 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
558 spin_lock_irqsave(&qedi->hba_lock, flags);
559 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
560 pld_len, num_bdqs, conn->data);
561 spin_unlock_irqrestore(&qedi->hba_lock, flags);
562 }
563 hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
564 memset(hdr, 0, sizeof(struct iscsi_hdr));
565 hdr->opcode = cqe_reject->opcode;
566 hdr->reason = cqe_reject->hdr_reason;
567 hdr->flags = cqe_reject->hdr_flags;
568 hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
569 ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
570 hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
571 hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
572 hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
573 hdr->ffffffff = cpu_to_be32(0xffffffff);
574
575 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
576 conn->data, pld_len);
577 spin_unlock_bh(&session->back_lock);
578 }
579
580 static void qedi_scsi_completion(struct qedi_ctx *qedi,
581 union iscsi_cqe *cqe,
582 struct iscsi_task *task,
583 struct iscsi_conn *conn)
584 {
585 struct scsi_cmnd *sc_cmd;
586 struct qedi_cmd *cmd = task->dd_data;
587 struct iscsi_session *session = conn->session;
588 struct iscsi_scsi_rsp *hdr;
589 struct iscsi_data_in_hdr *cqe_data_in;
590 int datalen = 0;
591 struct qedi_conn *qedi_conn;
592 u32 iscsi_cid;
593 bool mark_cmd_node_deleted = false;
594 u8 cqe_err_bits = 0;
595
596 iscsi_cid = cqe->cqe_common.conn_id;
597 qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
598
599 cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
600 cqe_err_bits =
601 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
602
603 spin_lock_bh(&session->back_lock);
604 /* get the scsi command */
605 sc_cmd = cmd->scsi_cmd;
606
607 if (!sc_cmd) {
608 QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
609 goto error;
610 }
611
612 if (!sc_cmd->SCp.ptr) {
613 QEDI_WARN(&qedi->dbg_ctx,
614 "SCp.ptr is NULL, returned in another context.\n");
615 goto error;
616 }
617
618 if (!sc_cmd->request) {
619 QEDI_WARN(&qedi->dbg_ctx,
620 "sc_cmd->request is NULL, sc_cmd=%p.\n",
621 sc_cmd);
622 goto error;
623 }
624
625 if (!sc_cmd->request->special) {
626 QEDI_WARN(&qedi->dbg_ctx,
627 "request->special is NULL so request not valid, sc_cmd=%p.\n",
628 sc_cmd);
629 goto error;
630 }
631
632 if (!sc_cmd->request->q) {
633 QEDI_WARN(&qedi->dbg_ctx,
634 "request->q is NULL so request is not valid, sc_cmd=%p.\n",
635 sc_cmd);
636 goto error;
637 }
638
639 qedi_iscsi_unmap_sg_list(cmd);
640
641 hdr = (struct iscsi_scsi_rsp *)task->hdr;
642 hdr->opcode = cqe_data_in->opcode;
643 hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
644 hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
645 hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
646 hdr->response = cqe_data_in->reserved1;
647 hdr->cmd_status = cqe_data_in->status_rsvd;
648 hdr->flags = cqe_data_in->flags;
649 hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
650
651 if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
652 datalen = cqe_data_in->reserved2 &
653 ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
654 memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
655 }
656
657 /* If f/w reports data underrun err then set residual to IO transfer
658 * length, set Underrun flag and clear Overrun flag explicitly
659 */
660 if (unlikely(cqe_err_bits &&
661 GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
662 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
663 "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
664 hdr->itt, cqe_data_in->flags, cmd->task_id,
665 qedi_conn->iscsi_conn_id, hdr->residual_count,
666 scsi_bufflen(sc_cmd));
667 hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
668 hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
669 hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
670 }
671
672 spin_lock(&qedi_conn->list_lock);
673 if (likely(cmd->io_cmd_in_list)) {
674 cmd->io_cmd_in_list = false;
675 list_del_init(&cmd->io_cmd);
676 qedi_conn->active_cmd_count--;
677 mark_cmd_node_deleted = true;
678 }
679 spin_unlock(&qedi_conn->list_lock);
680
681 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
682 "Freeing tid=0x%x for cid=0x%x\n",
683 cmd->task_id, qedi_conn->iscsi_conn_id);
684 cmd->state = RESPONSE_RECEIVED;
685 if (qedi_io_tracing)
686 qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
687
688 qedi_clear_task_idx(qedi, cmd->task_id);
689 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
690 conn->data, datalen);
691 error:
692 spin_unlock_bh(&session->back_lock);
693 }
694
695 static void qedi_mtask_completion(struct qedi_ctx *qedi,
696 union iscsi_cqe *cqe,
697 struct iscsi_task *task,
698 struct qedi_conn *conn, uint16_t que_idx)
699 {
700 struct iscsi_conn *iscsi_conn;
701 u32 hdr_opcode;
702
703 hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
704 iscsi_conn = conn->cls_conn->dd_data;
705
706 switch (hdr_opcode) {
707 case ISCSI_OPCODE_SCSI_RESPONSE:
708 case ISCSI_OPCODE_DATA_IN:
709 qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
710 break;
711 case ISCSI_OPCODE_LOGIN_RESPONSE:
712 qedi_process_login_resp(qedi, cqe, task, conn);
713 break;
714 case ISCSI_OPCODE_TMF_RESPONSE:
715 qedi_process_tmf_resp(qedi, cqe, task, conn);
716 break;
717 case ISCSI_OPCODE_TEXT_RESPONSE:
718 qedi_process_text_resp(qedi, cqe, task, conn);
719 break;
720 case ISCSI_OPCODE_LOGOUT_RESPONSE:
721 qedi_process_logout_resp(qedi, cqe, task, conn);
722 break;
723 case ISCSI_OPCODE_NOP_IN:
724 qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
725 break;
726 default:
727 QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
728 }
729 }
730
731 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
732 struct iscsi_cqe_solicited *cqe,
733 struct iscsi_task *task,
734 struct qedi_conn *qedi_conn)
735 {
736 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
737 struct iscsi_session *session = conn->session;
738 struct qedi_cmd *cmd = task->dd_data;
739
740 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
741 "itid=0x%x, cmd task id=0x%x\n",
742 cqe->itid, cmd->task_id);
743
744 cmd->state = RESPONSE_RECEIVED;
745 qedi_clear_task_idx(qedi, cmd->task_id);
746
747 spin_lock_bh(&session->back_lock);
748 __iscsi_put_task(task);
749 spin_unlock_bh(&session->back_lock);
750 }
751
752 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
753 struct iscsi_cqe_solicited *cqe,
754 struct iscsi_task *task,
755 struct iscsi_conn *conn)
756 {
757 struct qedi_work_map *work, *work_tmp;
758 u32 proto_itt = cqe->itid;
759 u32 ptmp_itt = 0;
760 itt_t protoitt = 0;
761 int found = 0;
762 struct qedi_cmd *qedi_cmd = NULL;
763 u32 rtid = 0;
764 u32 iscsi_cid;
765 struct qedi_conn *qedi_conn;
766 struct qedi_cmd *cmd_new, *dbg_cmd;
767 struct iscsi_task *mtask;
768 struct iscsi_tm *tmf_hdr = NULL;
769
770 iscsi_cid = cqe->conn_id;
771 qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
772
773 /* Based on this itt get the corresponding qedi_cmd */
774 spin_lock_bh(&qedi_conn->tmf_work_lock);
775 list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
776 list) {
777 if (work->rtid == proto_itt) {
778 /* We found the command */
779 qedi_cmd = work->qedi_cmd;
780 if (!qedi_cmd->list_tmf_work) {
781 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
782 "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
783 proto_itt, qedi_conn->iscsi_conn_id);
784 WARN_ON(1);
785 }
786 found = 1;
787 mtask = qedi_cmd->task;
788 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
789 rtid = work->rtid;
790
791 list_del_init(&work->list);
792 kfree(work);
793 qedi_cmd->list_tmf_work = NULL;
794 }
795 }
796 spin_unlock_bh(&qedi_conn->tmf_work_lock);
797
798 if (found) {
799 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
800 "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
801 proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
802
803 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
804 ISCSI_TM_FUNC_ABORT_TASK) {
805 spin_lock_bh(&conn->session->back_lock);
806
807 protoitt = build_itt(get_itt(tmf_hdr->rtt),
808 conn->session->age);
809 task = iscsi_itt_to_task(conn, protoitt);
810
811 spin_unlock_bh(&conn->session->back_lock);
812
813 if (!task) {
814 QEDI_NOTICE(&qedi->dbg_ctx,
815 "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
816 get_itt(tmf_hdr->rtt),
817 qedi_conn->iscsi_conn_id);
818 return;
819 }
820
821 dbg_cmd = task->dd_data;
822
823 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
824 "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
825 get_itt(tmf_hdr->rtt), get_itt(task->itt),
826 dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
827
828 if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
829 qedi_cmd->state = CLEANUP_RECV;
830
831 qedi_clear_task_idx(qedi_conn->qedi, rtid);
832
833 spin_lock(&qedi_conn->list_lock);
834 list_del_init(&dbg_cmd->io_cmd);
835 qedi_conn->active_cmd_count--;
836 spin_unlock(&qedi_conn->list_lock);
837 qedi_cmd->state = CLEANUP_RECV;
838 wake_up_interruptible(&qedi_conn->wait_queue);
839 }
840 } else if (qedi_conn->cmd_cleanup_req > 0) {
841 spin_lock_bh(&conn->session->back_lock);
842 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
843 protoitt = build_itt(ptmp_itt, conn->session->age);
844 task = iscsi_itt_to_task(conn, protoitt);
845 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
846 "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
847 cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
848 qedi_conn->iscsi_conn_id);
849
850 spin_unlock_bh(&conn->session->back_lock);
851 if (!task) {
852 QEDI_NOTICE(&qedi->dbg_ctx,
853 "task is null, itid=0x%x, cid=0x%x\n",
854 cqe->itid, qedi_conn->iscsi_conn_id);
855 return;
856 }
857 qedi_conn->cmd_cleanup_cmpl++;
858 wake_up(&qedi_conn->wait_queue);
859 cmd_new = task->dd_data;
860
861 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
862 "Freeing tid=0x%x for cid=0x%x\n",
863 cqe->itid, qedi_conn->iscsi_conn_id);
864 qedi_clear_task_idx(qedi_conn->qedi, cqe->itid);
865
866 } else {
867 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
868 protoitt = build_itt(ptmp_itt, conn->session->age);
869 task = iscsi_itt_to_task(conn, protoitt);
870 QEDI_ERR(&qedi->dbg_ctx,
871 "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
872 protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
873 }
874 }
875
876 void qedi_fp_process_cqes(struct qedi_work *work)
877 {
878 struct qedi_ctx *qedi = work->qedi;
879 union iscsi_cqe *cqe = &work->cqe;
880 struct iscsi_task *task = NULL;
881 struct iscsi_nopout *nopout_hdr;
882 struct qedi_conn *q_conn;
883 struct iscsi_conn *conn;
884 struct qedi_cmd *qedi_cmd;
885 u32 comp_type;
886 u32 iscsi_cid;
887 u32 hdr_opcode;
888 u16 que_idx = work->que_idx;
889 u8 cqe_err_bits = 0;
890
891 comp_type = cqe->cqe_common.cqe_type;
892 hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
893 cqe_err_bits =
894 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
895
896 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
897 "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
898 cqe->cqe_common.conn_id, comp_type, hdr_opcode);
899
900 if (comp_type >= MAX_ISCSI_CQES_TYPE) {
901 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
902 return;
903 }
904
905 iscsi_cid = cqe->cqe_common.conn_id;
906 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
907 if (!q_conn) {
908 QEDI_WARN(&qedi->dbg_ctx,
909 "Session no longer exists for cid=0x%x!!\n",
910 iscsi_cid);
911 return;
912 }
913
914 conn = q_conn->cls_conn->dd_data;
915
916 if (unlikely(cqe_err_bits &&
917 GET_FIELD(cqe_err_bits,
918 CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
919 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
920 return;
921 }
922
923 switch (comp_type) {
924 case ISCSI_CQE_TYPE_SOLICITED:
925 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
926 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
927 task = qedi_cmd->task;
928 if (!task) {
929 QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
930 return;
931 }
932
933 /* Process NOPIN local completion */
934 nopout_hdr = (struct iscsi_nopout *)task->hdr;
935 if ((nopout_hdr->itt == RESERVED_ITT) &&
936 (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
937 qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
938 task, q_conn);
939 } else {
940 cqe->cqe_solicited.itid =
941 qedi_get_itt(cqe->cqe_solicited);
942 /* Process other solicited responses */
943 qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
944 }
945 break;
946 case ISCSI_CQE_TYPE_UNSOLICITED:
947 switch (hdr_opcode) {
948 case ISCSI_OPCODE_NOP_IN:
949 qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
950 que_idx);
951 break;
952 case ISCSI_OPCODE_ASYNC_MSG:
953 qedi_process_async_mesg(qedi, cqe, task, q_conn,
954 que_idx);
955 break;
956 case ISCSI_OPCODE_REJECT:
957 qedi_process_reject_mesg(qedi, cqe, task, q_conn,
958 que_idx);
959 break;
960 }
961 goto exit_fp_process;
962 case ISCSI_CQE_TYPE_DUMMY:
963 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
964 goto exit_fp_process;
965 case ISCSI_CQE_TYPE_TASK_CLEANUP:
966 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
967 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
968 conn);
969 goto exit_fp_process;
970 default:
971 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
972 break;
973 }
974
975 exit_fp_process:
976 return;
977 }
978
979 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
980 {
981 struct iscsi_db_data dbell = { 0 };
982
983 dbell.agg_flags = 0;
984
985 dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
986 dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
987 dbell.params |=
988 DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
989
990 dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
991 writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
992
993 /* Make sure fw write idx is coherent, and include both memory barriers
994 * as a failsafe as for some architectures the call is the same but on
995 * others they are two different assembly operations.
996 */
997 wmb();
998 mmiowb();
999 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
1000 "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
1001 qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
1002 qedi_conn->iscsi_conn_id);
1003 }
1004
1005 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
1006 {
1007 struct qedi_endpoint *ep;
1008 u16 rval;
1009
1010 ep = qedi_conn->ep;
1011 rval = ep->sq_prod_idx;
1012
1013 /* Increament SQ index */
1014 ep->sq_prod_idx++;
1015 ep->fw_sq_prod_idx++;
1016 if (ep->sq_prod_idx == QEDI_SQ_SIZE)
1017 ep->sq_prod_idx = 0;
1018
1019 return rval;
1020 }
1021
1022 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
1023 struct iscsi_task *task)
1024 {
1025 struct iscsi_login_req_hdr login_req_pdu_header;
1026 struct scsi_sgl_task_params tx_sgl_task_params;
1027 struct scsi_sgl_task_params rx_sgl_task_params;
1028 struct iscsi_task_params task_params;
1029 struct iscsi_task_context *fw_task_ctx;
1030 struct qedi_ctx *qedi = qedi_conn->qedi;
1031 struct iscsi_login_req *login_hdr;
1032 struct scsi_sge *req_sge = NULL;
1033 struct scsi_sge *resp_sge = NULL;
1034 struct qedi_cmd *qedi_cmd;
1035 struct qedi_endpoint *ep;
1036 s16 tid = 0;
1037 u16 sq_idx = 0;
1038 int rval = 0;
1039
1040 req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1041 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1042 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1043 ep = qedi_conn->ep;
1044 login_hdr = (struct iscsi_login_req *)task->hdr;
1045
1046 tid = qedi_get_task_idx(qedi);
1047 if (tid == -1)
1048 return -ENOMEM;
1049
1050 fw_task_ctx =
1051 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, tid);
1052 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1053
1054 qedi_cmd->task_id = tid;
1055
1056 memset(&task_params, 0, sizeof(task_params));
1057 memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
1058 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1059 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1060 /* Update header info */
1061 login_req_pdu_header.opcode = login_hdr->opcode;
1062 login_req_pdu_header.version_min = login_hdr->min_version;
1063 login_req_pdu_header.version_max = login_hdr->max_version;
1064 login_req_pdu_header.flags_attr = login_hdr->flags;
1065 login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1066 login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1067
1068 login_req_pdu_header.tsih = login_hdr->tsih;
1069 login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1070
1071 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1072 login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1073 login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1074 login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1075 login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1076 login_req_pdu_header.exp_stat_sn = 0;
1077
1078 /* Fill tx AHS and rx buffer */
1079 tx_sgl_task_params.sgl =
1080 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1081 tx_sgl_task_params.sgl_phys_addr.lo =
1082 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1083 tx_sgl_task_params.sgl_phys_addr.hi =
1084 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1085 tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1086 tx_sgl_task_params.num_sges = 1;
1087
1088 rx_sgl_task_params.sgl =
1089 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1090 rx_sgl_task_params.sgl_phys_addr.lo =
1091 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1092 rx_sgl_task_params.sgl_phys_addr.hi =
1093 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1094 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1095 rx_sgl_task_params.num_sges = 1;
1096
1097 /* Fill fw input params */
1098 task_params.context = fw_task_ctx;
1099 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1100 task_params.itid = tid;
1101 task_params.cq_rss_number = 0;
1102 task_params.tx_io_size = ntoh24(login_hdr->dlength);
1103 task_params.rx_io_size = resp_sge->sge_len;
1104
1105 sq_idx = qedi_get_wqe_idx(qedi_conn);
1106 task_params.sqe = &ep->sq[sq_idx];
1107
1108 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1109 rval = init_initiator_login_request_task(&task_params,
1110 &login_req_pdu_header,
1111 &tx_sgl_task_params,
1112 &rx_sgl_task_params);
1113 if (rval)
1114 return -1;
1115
1116 spin_lock(&qedi_conn->list_lock);
1117 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1118 qedi_cmd->io_cmd_in_list = true;
1119 qedi_conn->active_cmd_count++;
1120 spin_unlock(&qedi_conn->list_lock);
1121
1122 qedi_ring_doorbell(qedi_conn);
1123 return 0;
1124 }
1125
1126 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1127 struct iscsi_task *task)
1128 {
1129 struct iscsi_logout_req_hdr logout_pdu_header;
1130 struct scsi_sgl_task_params tx_sgl_task_params;
1131 struct scsi_sgl_task_params rx_sgl_task_params;
1132 struct iscsi_task_params task_params;
1133 struct iscsi_task_context *fw_task_ctx;
1134 struct iscsi_logout *logout_hdr = NULL;
1135 struct qedi_ctx *qedi = qedi_conn->qedi;
1136 struct qedi_cmd *qedi_cmd;
1137 struct qedi_endpoint *ep;
1138 s16 tid = 0;
1139 u16 sq_idx = 0;
1140 int rval = 0;
1141
1142 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1143 logout_hdr = (struct iscsi_logout *)task->hdr;
1144 ep = qedi_conn->ep;
1145
1146 tid = qedi_get_task_idx(qedi);
1147 if (tid == -1)
1148 return -ENOMEM;
1149
1150 fw_task_ctx =
1151 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, tid);
1152 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1153
1154 qedi_cmd->task_id = tid;
1155
1156 memset(&task_params, 0, sizeof(task_params));
1157 memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1158 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1159 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1160
1161 /* Update header info */
1162 logout_pdu_header.opcode = logout_hdr->opcode;
1163 logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1164 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1165 logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1166 logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1167 logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1168 logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1169
1170 /* Fill fw input params */
1171 task_params.context = fw_task_ctx;
1172 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1173 task_params.itid = tid;
1174 task_params.cq_rss_number = 0;
1175 task_params.tx_io_size = 0;
1176 task_params.rx_io_size = 0;
1177
1178 sq_idx = qedi_get_wqe_idx(qedi_conn);
1179 task_params.sqe = &ep->sq[sq_idx];
1180 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1181
1182 rval = init_initiator_logout_request_task(&task_params,
1183 &logout_pdu_header,
1184 NULL, NULL);
1185 if (rval)
1186 return -1;
1187
1188 spin_lock(&qedi_conn->list_lock);
1189 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1190 qedi_cmd->io_cmd_in_list = true;
1191 qedi_conn->active_cmd_count++;
1192 spin_unlock(&qedi_conn->list_lock);
1193
1194 qedi_ring_doorbell(qedi_conn);
1195 return 0;
1196 }
1197
1198 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1199 struct iscsi_task *task, bool in_recovery)
1200 {
1201 int rval;
1202 struct iscsi_task *ctask;
1203 struct qedi_cmd *cmd, *cmd_tmp;
1204 struct iscsi_tm *tmf_hdr;
1205 unsigned int lun = 0;
1206 bool lun_reset = false;
1207 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1208 struct iscsi_session *session = conn->session;
1209
1210 /* From recovery, task is NULL or from tmf resp valid task */
1211 if (task) {
1212 tmf_hdr = (struct iscsi_tm *)task->hdr;
1213
1214 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1215 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1216 lun_reset = true;
1217 lun = scsilun_to_int(&tmf_hdr->lun);
1218 }
1219 }
1220
1221 qedi_conn->cmd_cleanup_req = 0;
1222 qedi_conn->cmd_cleanup_cmpl = 0;
1223
1224 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1225 "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1226 qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1227 in_recovery, lun_reset);
1228
1229 if (lun_reset)
1230 spin_lock_bh(&session->back_lock);
1231
1232 spin_lock(&qedi_conn->list_lock);
1233
1234 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1235 io_cmd) {
1236 ctask = cmd->task;
1237 if (ctask == task)
1238 continue;
1239
1240 if (lun_reset) {
1241 if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1242 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1243 "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1244 cmd->task_id, get_itt(ctask->itt),
1245 cmd->scsi_cmd, cmd->scsi_cmd->device,
1246 ctask->state, cmd->state,
1247 qedi_conn->iscsi_conn_id);
1248 if (cmd->scsi_cmd->device->lun != lun)
1249 continue;
1250 }
1251 }
1252 qedi_conn->cmd_cleanup_req++;
1253 qedi_iscsi_cleanup_task(ctask, true);
1254
1255 list_del_init(&cmd->io_cmd);
1256 qedi_conn->active_cmd_count--;
1257 QEDI_WARN(&qedi->dbg_ctx,
1258 "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1259 &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1260 }
1261
1262 spin_unlock(&qedi_conn->list_lock);
1263
1264 if (lun_reset)
1265 spin_unlock_bh(&session->back_lock);
1266
1267 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1268 "cmd_cleanup_req=%d, cid=0x%x\n",
1269 qedi_conn->cmd_cleanup_req,
1270 qedi_conn->iscsi_conn_id);
1271
1272 rval = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1273 ((qedi_conn->cmd_cleanup_req ==
1274 qedi_conn->cmd_cleanup_cmpl) ||
1275 qedi_conn->ep),
1276 5 * HZ);
1277 if (rval) {
1278 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1279 "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1280 qedi_conn->cmd_cleanup_req,
1281 qedi_conn->cmd_cleanup_cmpl,
1282 qedi_conn->iscsi_conn_id);
1283
1284 return 0;
1285 }
1286
1287 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1288 "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1289 qedi_conn->cmd_cleanup_req,
1290 qedi_conn->cmd_cleanup_cmpl,
1291 qedi_conn->iscsi_conn_id);
1292
1293 iscsi_host_for_each_session(qedi->shost,
1294 qedi_mark_device_missing);
1295 qedi_ops->common->drain(qedi->cdev);
1296
1297 /* Enable IOs for all other sessions except current.*/
1298 if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1299 (qedi_conn->cmd_cleanup_req ==
1300 qedi_conn->cmd_cleanup_cmpl),
1301 5 * HZ)) {
1302 iscsi_host_for_each_session(qedi->shost,
1303 qedi_mark_device_available);
1304 return -1;
1305 }
1306
1307 iscsi_host_for_each_session(qedi->shost,
1308 qedi_mark_device_available);
1309
1310 return 0;
1311 }
1312
1313 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1314 struct iscsi_task *task)
1315 {
1316 struct qedi_endpoint *qedi_ep;
1317 int rval;
1318
1319 qedi_ep = qedi_conn->ep;
1320 qedi_conn->cmd_cleanup_req = 0;
1321 qedi_conn->cmd_cleanup_cmpl = 0;
1322
1323 if (!qedi_ep) {
1324 QEDI_WARN(&qedi->dbg_ctx,
1325 "Cannot proceed, ep already disconnected, cid=0x%x\n",
1326 qedi_conn->iscsi_conn_id);
1327 return;
1328 }
1329
1330 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1331 "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1332 qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1333
1334 qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1335
1336 rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1337 if (rval) {
1338 QEDI_ERR(&qedi->dbg_ctx,
1339 "fatal error, need hard reset, cid=0x%x\n",
1340 qedi_conn->iscsi_conn_id);
1341 WARN_ON(1);
1342 }
1343 }
1344
1345 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1346 struct qedi_conn *qedi_conn,
1347 struct iscsi_task *task,
1348 struct qedi_cmd *qedi_cmd,
1349 struct qedi_work_map *list_work)
1350 {
1351 struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1352 int wait;
1353
1354 wait = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1355 ((qedi_cmd->state ==
1356 CLEANUP_RECV) ||
1357 ((qedi_cmd->type == TYPEIO) &&
1358 (cmd->state ==
1359 RESPONSE_RECEIVED))),
1360 5 * HZ);
1361 if (!wait) {
1362 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1363
1364 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1365 "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1366 cmd->task_id, qedi_conn->iscsi_conn_id);
1367
1368 return -1;
1369 }
1370 return 0;
1371 }
1372
1373 static void qedi_tmf_work(struct work_struct *work)
1374 {
1375 struct qedi_cmd *qedi_cmd =
1376 container_of(work, struct qedi_cmd, tmf_work);
1377 struct qedi_conn *qedi_conn = qedi_cmd->conn;
1378 struct qedi_ctx *qedi = qedi_conn->qedi;
1379 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1380 struct iscsi_cls_session *cls_sess;
1381 struct qedi_work_map *list_work = NULL;
1382 struct iscsi_task *mtask;
1383 struct qedi_cmd *cmd;
1384 struct iscsi_task *ctask;
1385 struct iscsi_tm *tmf_hdr;
1386 s16 rval = 0;
1387 s16 tid = 0;
1388
1389 mtask = qedi_cmd->task;
1390 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1391 cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
1392 set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1393
1394 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1395 if (!ctask || !ctask->sc) {
1396 QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
1397 goto abort_ret;
1398 }
1399
1400 cmd = (struct qedi_cmd *)ctask->dd_data;
1401 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1402 "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1403 get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1404 qedi_conn->iscsi_conn_id);
1405
1406 if (qedi_do_not_recover) {
1407 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1408 qedi_do_not_recover);
1409 goto abort_ret;
1410 }
1411
1412 list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
1413 if (!list_work) {
1414 QEDI_ERR(&qedi->dbg_ctx, "Memory alloction failed\n");
1415 goto abort_ret;
1416 }
1417
1418 qedi_cmd->type = TYPEIO;
1419 list_work->qedi_cmd = qedi_cmd;
1420 list_work->rtid = cmd->task_id;
1421 list_work->state = QEDI_WORK_SCHEDULED;
1422 qedi_cmd->list_tmf_work = list_work;
1423
1424 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1425 "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1426 list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1427 tmf_hdr->flags);
1428
1429 spin_lock_bh(&qedi_conn->tmf_work_lock);
1430 list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1431 spin_unlock_bh(&qedi_conn->tmf_work_lock);
1432
1433 qedi_iscsi_cleanup_task(ctask, false);
1434
1435 rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1436 list_work);
1437 if (rval == -1) {
1438 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1439 "FW cleanup got escalated, cid=0x%x\n",
1440 qedi_conn->iscsi_conn_id);
1441 goto ldel_exit;
1442 }
1443
1444 tid = qedi_get_task_idx(qedi);
1445 if (tid == -1) {
1446 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1447 qedi_conn->iscsi_conn_id);
1448 goto ldel_exit;
1449 }
1450
1451 qedi_cmd->task_id = tid;
1452 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1453
1454 abort_ret:
1455 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1456 return;
1457
1458 ldel_exit:
1459 spin_lock_bh(&qedi_conn->tmf_work_lock);
1460 if (!qedi_cmd->list_tmf_work) {
1461 list_del_init(&list_work->list);
1462 qedi_cmd->list_tmf_work = NULL;
1463 kfree(list_work);
1464 }
1465 spin_unlock_bh(&qedi_conn->tmf_work_lock);
1466
1467 spin_lock(&qedi_conn->list_lock);
1468 list_del_init(&cmd->io_cmd);
1469 qedi_conn->active_cmd_count--;
1470 spin_unlock(&qedi_conn->list_lock);
1471
1472 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1473 }
1474
1475 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
1476 struct iscsi_task *mtask)
1477 {
1478 struct iscsi_tmf_request_hdr tmf_pdu_header;
1479 struct iscsi_task_params task_params;
1480 struct qedi_ctx *qedi = qedi_conn->qedi;
1481 struct iscsi_task_context *fw_task_ctx;
1482 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1483 struct iscsi_task *ctask;
1484 struct iscsi_tm *tmf_hdr;
1485 struct qedi_cmd *qedi_cmd;
1486 struct qedi_cmd *cmd;
1487 struct qedi_endpoint *ep;
1488 u32 scsi_lun[2];
1489 s16 tid = 0;
1490 u16 sq_idx = 0;
1491 int rval = 0;
1492
1493 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1494 qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1495 ep = qedi_conn->ep;
1496 if (!ep)
1497 return -ENODEV;
1498
1499 tid = qedi_get_task_idx(qedi);
1500 if (tid == -1)
1501 return -ENOMEM;
1502
1503 fw_task_ctx =
1504 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, tid);
1505 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1506
1507 qedi_cmd->task_id = tid;
1508
1509 memset(&task_params, 0, sizeof(task_params));
1510 memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1511
1512 /* Update header info */
1513 qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1514 tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1515 tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1516
1517 memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1518 tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1519 tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1520
1521 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1522 ISCSI_TM_FUNC_ABORT_TASK) {
1523 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1524 if (!ctask || !ctask->sc) {
1525 QEDI_ERR(&qedi->dbg_ctx,
1526 "Could not get reference task\n");
1527 return 0;
1528 }
1529 cmd = (struct qedi_cmd *)ctask->dd_data;
1530 tmf_pdu_header.rtt =
1531 qedi_set_itt(cmd->task_id,
1532 get_itt(tmf_hdr->rtt));
1533 } else {
1534 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1535 }
1536
1537 tmf_pdu_header.opcode = tmf_hdr->opcode;
1538 tmf_pdu_header.function = tmf_hdr->flags;
1539 tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1540 tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1541
1542 /* Fill fw input params */
1543 task_params.context = fw_task_ctx;
1544 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1545 task_params.itid = tid;
1546 task_params.cq_rss_number = 0;
1547 task_params.tx_io_size = 0;
1548 task_params.rx_io_size = 0;
1549
1550 sq_idx = qedi_get_wqe_idx(qedi_conn);
1551 task_params.sqe = &ep->sq[sq_idx];
1552
1553 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1554 rval = init_initiator_tmf_request_task(&task_params,
1555 &tmf_pdu_header);
1556 if (rval)
1557 return -1;
1558
1559 spin_lock(&qedi_conn->list_lock);
1560 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1561 qedi_cmd->io_cmd_in_list = true;
1562 qedi_conn->active_cmd_count++;
1563 spin_unlock(&qedi_conn->list_lock);
1564
1565 qedi_ring_doorbell(qedi_conn);
1566 return 0;
1567 }
1568
1569 int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
1570 struct iscsi_task *mtask)
1571 {
1572 struct qedi_ctx *qedi = qedi_conn->qedi;
1573 struct iscsi_tm *tmf_hdr;
1574 struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1575 s16 tid = 0;
1576
1577 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1578 qedi_cmd->task = mtask;
1579
1580 /* If abort task then schedule the work and return */
1581 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1582 ISCSI_TM_FUNC_ABORT_TASK) {
1583 qedi_cmd->state = CLEANUP_WAIT;
1584 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
1585 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1586
1587 } else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1588 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
1589 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1590 ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
1591 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1592 ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
1593 tid = qedi_get_task_idx(qedi);
1594 if (tid == -1) {
1595 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1596 qedi_conn->iscsi_conn_id);
1597 return -1;
1598 }
1599 qedi_cmd->task_id = tid;
1600
1601 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1602
1603 } else {
1604 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1605 qedi_conn->iscsi_conn_id);
1606 return -1;
1607 }
1608
1609 return 0;
1610 }
1611
1612 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1613 struct iscsi_task *task)
1614 {
1615 struct iscsi_text_request_hdr text_request_pdu_header;
1616 struct scsi_sgl_task_params tx_sgl_task_params;
1617 struct scsi_sgl_task_params rx_sgl_task_params;
1618 struct iscsi_task_params task_params;
1619 struct iscsi_task_context *fw_task_ctx;
1620 struct qedi_ctx *qedi = qedi_conn->qedi;
1621 struct iscsi_text *text_hdr;
1622 struct scsi_sge *req_sge = NULL;
1623 struct scsi_sge *resp_sge = NULL;
1624 struct qedi_cmd *qedi_cmd;
1625 struct qedi_endpoint *ep;
1626 s16 tid = 0;
1627 u16 sq_idx = 0;
1628 int rval = 0;
1629
1630 req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1631 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1632 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1633 text_hdr = (struct iscsi_text *)task->hdr;
1634 ep = qedi_conn->ep;
1635
1636 tid = qedi_get_task_idx(qedi);
1637 if (tid == -1)
1638 return -ENOMEM;
1639
1640 fw_task_ctx =
1641 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, tid);
1642 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1643
1644 qedi_cmd->task_id = tid;
1645
1646 memset(&task_params, 0, sizeof(task_params));
1647 memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1648 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1649 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1650
1651 /* Update header info */
1652 text_request_pdu_header.opcode = text_hdr->opcode;
1653 text_request_pdu_header.flags_attr = text_hdr->flags;
1654
1655 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1656 text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1657 text_request_pdu_header.ttt = text_hdr->ttt;
1658 text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1659 text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1660 text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1661
1662 /* Fill tx AHS and rx buffer */
1663 tx_sgl_task_params.sgl =
1664 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1665 tx_sgl_task_params.sgl_phys_addr.lo =
1666 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1667 tx_sgl_task_params.sgl_phys_addr.hi =
1668 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1669 tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1670 tx_sgl_task_params.num_sges = 1;
1671
1672 rx_sgl_task_params.sgl =
1673 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1674 rx_sgl_task_params.sgl_phys_addr.lo =
1675 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1676 rx_sgl_task_params.sgl_phys_addr.hi =
1677 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1678 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1679 rx_sgl_task_params.num_sges = 1;
1680
1681 /* Fill fw input params */
1682 task_params.context = fw_task_ctx;
1683 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1684 task_params.itid = tid;
1685 task_params.cq_rss_number = 0;
1686 task_params.tx_io_size = ntoh24(text_hdr->dlength);
1687 task_params.rx_io_size = resp_sge->sge_len;
1688
1689 sq_idx = qedi_get_wqe_idx(qedi_conn);
1690 task_params.sqe = &ep->sq[sq_idx];
1691
1692 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1693 rval = init_initiator_text_request_task(&task_params,
1694 &text_request_pdu_header,
1695 &tx_sgl_task_params,
1696 &rx_sgl_task_params);
1697 if (rval)
1698 return -1;
1699
1700 spin_lock(&qedi_conn->list_lock);
1701 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1702 qedi_cmd->io_cmd_in_list = true;
1703 qedi_conn->active_cmd_count++;
1704 spin_unlock(&qedi_conn->list_lock);
1705
1706 qedi_ring_doorbell(qedi_conn);
1707 return 0;
1708 }
1709
1710 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1711 struct iscsi_task *task,
1712 char *datap, int data_len, int unsol)
1713 {
1714 struct iscsi_nop_out_hdr nop_out_pdu_header;
1715 struct scsi_sgl_task_params tx_sgl_task_params;
1716 struct scsi_sgl_task_params rx_sgl_task_params;
1717 struct iscsi_task_params task_params;
1718 struct qedi_ctx *qedi = qedi_conn->qedi;
1719 struct iscsi_task_context *fw_task_ctx;
1720 struct iscsi_nopout *nopout_hdr;
1721 struct scsi_sge *req_sge = NULL;
1722 struct scsi_sge *resp_sge = NULL;
1723 struct qedi_cmd *qedi_cmd;
1724 struct qedi_endpoint *ep;
1725 u32 scsi_lun[2];
1726 s16 tid = 0;
1727 u16 sq_idx = 0;
1728 int rval = 0;
1729
1730 req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1731 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1732 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1733 nopout_hdr = (struct iscsi_nopout *)task->hdr;
1734 ep = qedi_conn->ep;
1735
1736 tid = qedi_get_task_idx(qedi);
1737 if (tid == -1)
1738 return -ENOMEM;
1739
1740 fw_task_ctx =
1741 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, tid);
1742 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1743
1744 qedi_cmd->task_id = tid;
1745
1746 memset(&task_params, 0, sizeof(task_params));
1747 memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1748 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1749 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1750
1751 /* Update header info */
1752 nop_out_pdu_header.opcode = nopout_hdr->opcode;
1753 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1754 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1755
1756 memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1757 nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1758 nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1759 nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1760 nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1761
1762 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1763
1764 if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1765 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1766 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1767 } else {
1768 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1769 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1770
1771 spin_lock(&qedi_conn->list_lock);
1772 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1773 qedi_cmd->io_cmd_in_list = true;
1774 qedi_conn->active_cmd_count++;
1775 spin_unlock(&qedi_conn->list_lock);
1776 }
1777
1778 /* Fill tx AHS and rx buffer */
1779 if (data_len) {
1780 tx_sgl_task_params.sgl =
1781 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1782 tx_sgl_task_params.sgl_phys_addr.lo =
1783 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1784 tx_sgl_task_params.sgl_phys_addr.hi =
1785 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1786 tx_sgl_task_params.total_buffer_size = data_len;
1787 tx_sgl_task_params.num_sges = 1;
1788
1789 rx_sgl_task_params.sgl =
1790 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1791 rx_sgl_task_params.sgl_phys_addr.lo =
1792 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1793 rx_sgl_task_params.sgl_phys_addr.hi =
1794 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1795 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1796 rx_sgl_task_params.num_sges = 1;
1797 }
1798
1799 /* Fill fw input params */
1800 task_params.context = fw_task_ctx;
1801 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1802 task_params.itid = tid;
1803 task_params.cq_rss_number = 0;
1804 task_params.tx_io_size = data_len;
1805 task_params.rx_io_size = resp_sge->sge_len;
1806
1807 sq_idx = qedi_get_wqe_idx(qedi_conn);
1808 task_params.sqe = &ep->sq[sq_idx];
1809
1810 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1811 rval = init_initiator_nop_out_task(&task_params,
1812 &nop_out_pdu_header,
1813 &tx_sgl_task_params,
1814 &rx_sgl_task_params);
1815 if (rval)
1816 return -1;
1817
1818 qedi_ring_doorbell(qedi_conn);
1819 return 0;
1820 }
1821
1822 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1823 int bd_index)
1824 {
1825 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1826 int frag_size, sg_frags;
1827
1828 sg_frags = 0;
1829
1830 while (sg_len) {
1831 if (addr % QEDI_PAGE_SIZE)
1832 frag_size =
1833 (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1834 else
1835 frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1836 (sg_len % QEDI_BD_SPLIT_SZ);
1837
1838 if (frag_size == 0)
1839 frag_size = QEDI_BD_SPLIT_SZ;
1840
1841 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1842 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1843 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1844 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1845 "split sge %d: addr=%llx, len=%x",
1846 (bd_index + sg_frags), addr, frag_size);
1847
1848 addr += (u64)frag_size;
1849 sg_frags++;
1850 sg_len -= frag_size;
1851 }
1852 return sg_frags;
1853 }
1854
1855 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1856 {
1857 struct scsi_cmnd *sc = cmd->scsi_cmd;
1858 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1859 struct scatterlist *sg;
1860 int byte_count = 0;
1861 int bd_count = 0;
1862 int sg_count;
1863 int sg_len;
1864 int sg_frags;
1865 u64 addr, end_addr;
1866 int i;
1867
1868 WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1869
1870 sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1871 scsi_sg_count(sc), sc->sc_data_direction);
1872
1873 /*
1874 * New condition to send single SGE as cached-SGL.
1875 * Single SGE with length less than 64K.
1876 */
1877 sg = scsi_sglist(sc);
1878 if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1879 sg_len = sg_dma_len(sg);
1880 addr = (u64)sg_dma_address(sg);
1881
1882 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1883 bd[bd_count].sge_addr.hi = (addr >> 32);
1884 bd[bd_count].sge_len = (u16)sg_len;
1885
1886 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1887 "single-cashed-sgl: bd_count:%d addr=%llx, len=%x",
1888 sg_count, addr, sg_len);
1889
1890 return ++bd_count;
1891 }
1892
1893 scsi_for_each_sg(sc, sg, sg_count, i) {
1894 sg_len = sg_dma_len(sg);
1895 addr = (u64)sg_dma_address(sg);
1896 end_addr = (addr + sg_len);
1897
1898 /*
1899 * first sg elem in the 'list',
1900 * check if end addr is page-aligned.
1901 */
1902 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1903 cmd->use_slowpath = true;
1904
1905 /*
1906 * last sg elem in the 'list',
1907 * check if start addr is page-aligned.
1908 */
1909 else if ((i == (sg_count - 1)) &&
1910 (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1911 cmd->use_slowpath = true;
1912
1913 /*
1914 * middle sg elements in list,
1915 * check if start and end addr is page-aligned
1916 */
1917 else if ((i != 0) && (i != (sg_count - 1)) &&
1918 ((addr % QEDI_PAGE_SIZE) ||
1919 (end_addr % QEDI_PAGE_SIZE)))
1920 cmd->use_slowpath = true;
1921
1922 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1923 i, sg_len);
1924
1925 if (sg_len > QEDI_BD_SPLIT_SZ) {
1926 sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1927 } else {
1928 sg_frags = 1;
1929 bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1930 bd[bd_count].sge_addr.hi = addr >> 32;
1931 bd[bd_count].sge_len = sg_len;
1932 }
1933 byte_count += sg_len;
1934 bd_count += sg_frags;
1935 }
1936
1937 if (byte_count != scsi_bufflen(sc))
1938 QEDI_ERR(&qedi->dbg_ctx,
1939 "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1940 scsi_bufflen(sc));
1941 else
1942 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1943 byte_count);
1944
1945 WARN_ON(byte_count != scsi_bufflen(sc));
1946
1947 return bd_count;
1948 }
1949
1950 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1951 {
1952 int bd_count;
1953 struct scsi_cmnd *sc = cmd->scsi_cmd;
1954
1955 if (scsi_sg_count(sc)) {
1956 bd_count = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1957 if (bd_count == 0)
1958 return;
1959 } else {
1960 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1961
1962 bd[0].sge_addr.lo = 0;
1963 bd[0].sge_addr.hi = 0;
1964 bd[0].sge_len = 0;
1965 bd_count = 0;
1966 }
1967 cmd->io_tbl.sge_valid = bd_count;
1968 }
1969
1970 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1971 {
1972 u32 dword;
1973 int lpcnt;
1974 u8 *srcp;
1975
1976 lpcnt = sc->cmd_len / sizeof(dword);
1977 srcp = (u8 *)sc->cmnd;
1978 while (lpcnt--) {
1979 memcpy(&dword, (const void *)srcp, 4);
1980 *dstp = cpu_to_be32(dword);
1981 srcp += 4;
1982 dstp++;
1983 }
1984 if (sc->cmd_len & 0x3) {
1985 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1986 *dstp = cpu_to_be32(dword);
1987 }
1988 }
1989
1990 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
1991 u16 tid, int8_t direction)
1992 {
1993 struct qedi_io_log *io_log;
1994 struct iscsi_conn *conn = task->conn;
1995 struct qedi_conn *qedi_conn = conn->dd_data;
1996 struct scsi_cmnd *sc_cmd = task->sc;
1997 unsigned long flags;
1998 u8 op;
1999
2000 spin_lock_irqsave(&qedi->io_trace_lock, flags);
2001
2002 io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
2003 io_log->direction = direction;
2004 io_log->task_id = tid;
2005 io_log->cid = qedi_conn->iscsi_conn_id;
2006 io_log->lun = sc_cmd->device->lun;
2007 io_log->op = sc_cmd->cmnd[0];
2008 op = sc_cmd->cmnd[0];
2009 io_log->lba[0] = sc_cmd->cmnd[2];
2010 io_log->lba[1] = sc_cmd->cmnd[3];
2011 io_log->lba[2] = sc_cmd->cmnd[4];
2012 io_log->lba[3] = sc_cmd->cmnd[5];
2013 io_log->bufflen = scsi_bufflen(sc_cmd);
2014 io_log->sg_count = scsi_sg_count(sc_cmd);
2015 io_log->fast_sgs = qedi->fast_sgls;
2016 io_log->cached_sgs = qedi->cached_sgls;
2017 io_log->slow_sgs = qedi->slow_sgls;
2018 io_log->cached_sge = qedi->use_cached_sge;
2019 io_log->slow_sge = qedi->use_slow_sge;
2020 io_log->fast_sge = qedi->use_fast_sge;
2021 io_log->result = sc_cmd->result;
2022 io_log->jiffies = jiffies;
2023 io_log->blk_req_cpu = smp_processor_id();
2024
2025 if (direction == QEDI_IO_TRACE_REQ) {
2026 /* For requests we only care about the submission CPU */
2027 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2028 io_log->intr_cpu = 0;
2029 io_log->blk_rsp_cpu = 0;
2030 } else if (direction == QEDI_IO_TRACE_RSP) {
2031 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2032 io_log->intr_cpu = qedi->intr_cpu;
2033 io_log->blk_rsp_cpu = smp_processor_id();
2034 }
2035
2036 qedi->io_trace_idx++;
2037 if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
2038 qedi->io_trace_idx = 0;
2039
2040 qedi->use_cached_sge = false;
2041 qedi->use_slow_sge = false;
2042 qedi->use_fast_sge = false;
2043
2044 spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
2045 }
2046
2047 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
2048 {
2049 struct iscsi_conn *conn = task->conn;
2050 struct iscsi_session *session = conn->session;
2051 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
2052 struct qedi_ctx *qedi = iscsi_host_priv(shost);
2053 struct qedi_conn *qedi_conn = conn->dd_data;
2054 struct qedi_cmd *cmd = task->dd_data;
2055 struct scsi_cmnd *sc = task->sc;
2056 struct iscsi_cmd_hdr cmd_pdu_header;
2057 struct scsi_sgl_task_params tx_sgl_task_params;
2058 struct scsi_sgl_task_params rx_sgl_task_params;
2059 struct scsi_sgl_task_params *prx_sgl = NULL;
2060 struct scsi_sgl_task_params *ptx_sgl = NULL;
2061 struct iscsi_task_params task_params;
2062 struct iscsi_conn_params conn_params;
2063 struct scsi_initiator_cmd_params cmd_params;
2064 struct iscsi_task_context *fw_task_ctx;
2065 struct iscsi_cls_conn *cls_conn;
2066 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
2067 enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
2068 struct qedi_endpoint *ep;
2069 u32 scsi_lun[2];
2070 s16 tid = 0;
2071 u16 sq_idx = 0;
2072 u16 cq_idx;
2073 int rval = 0;
2074
2075 ep = qedi_conn->ep;
2076 cls_conn = qedi_conn->cls_conn;
2077 conn = cls_conn->dd_data;
2078
2079 qedi_iscsi_map_sg_list(cmd);
2080 int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2081
2082 tid = qedi_get_task_idx(qedi);
2083 if (tid == -1)
2084 return -ENOMEM;
2085
2086 fw_task_ctx =
2087 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks, tid);
2088 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
2089
2090 cmd->task_id = tid;
2091
2092 memset(&task_params, 0, sizeof(task_params));
2093 memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2094 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2095 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2096 memset(&conn_params, 0, sizeof(conn_params));
2097 memset(&cmd_params, 0, sizeof(cmd_params));
2098
2099 cq_idx = smp_processor_id() % qedi->num_queues;
2100 /* Update header info */
2101 SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2102 ISCSI_ATTR_SIMPLE);
2103 if (hdr->cdb[0] != TEST_UNIT_READY) {
2104 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2105 SET_FIELD(cmd_pdu_header.flags_attr,
2106 ISCSI_CMD_HDR_WRITE, 1);
2107 task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2108 } else {
2109 SET_FIELD(cmd_pdu_header.flags_attr,
2110 ISCSI_CMD_HDR_READ, 1);
2111 task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2112 }
2113 }
2114
2115 cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2116 cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2117
2118 qedi_update_itt_map(qedi, tid, task->itt, cmd);
2119 cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2120 cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2121 cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2122 cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2123 cmd_pdu_header.hdr_first_byte = hdr->opcode;
2124 qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2125
2126 /* Fill tx AHS and rx buffer */
2127 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2128 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2129 tx_sgl_task_params.sgl_phys_addr.lo =
2130 (u32)(cmd->io_tbl.sge_tbl_dma);
2131 tx_sgl_task_params.sgl_phys_addr.hi =
2132 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2133 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2134 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2135 if (cmd->use_slowpath)
2136 tx_sgl_task_params.small_mid_sge = true;
2137 } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2138 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2139 rx_sgl_task_params.sgl_phys_addr.lo =
2140 (u32)(cmd->io_tbl.sge_tbl_dma);
2141 rx_sgl_task_params.sgl_phys_addr.hi =
2142 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2143 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2144 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2145 }
2146
2147 /* Add conn param */
2148 conn_params.first_burst_length = conn->session->first_burst;
2149 conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2150 conn_params.max_burst_length = conn->session->max_burst;
2151 if (conn->session->initial_r2t_en)
2152 conn_params.initial_r2t = true;
2153 if (conn->session->imm_data_en)
2154 conn_params.immediate_data = true;
2155
2156 /* Add cmd params */
2157 cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2158 cmd_params.sense_data_buffer_phys_addr.hi =
2159 (u32)((u64)cmd->sense_buffer_dma >> 32);
2160 /* Fill fw input params */
2161 task_params.context = fw_task_ctx;
2162 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2163 task_params.itid = tid;
2164 task_params.cq_rss_number = cq_idx;
2165 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2166 task_params.tx_io_size = scsi_bufflen(sc);
2167 else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2168 task_params.rx_io_size = scsi_bufflen(sc);
2169
2170 sq_idx = qedi_get_wqe_idx(qedi_conn);
2171 task_params.sqe = &ep->sq[sq_idx];
2172
2173 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2174 "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2175 (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2176 "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2177 "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2178 (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2179 (u32)(cmd->io_tbl.sge_tbl_dma),
2180 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2181
2182 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2183
2184 if (task_params.tx_io_size != 0)
2185 ptx_sgl = &tx_sgl_task_params;
2186 if (task_params.rx_io_size != 0)
2187 prx_sgl = &rx_sgl_task_params;
2188
2189 rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2190 &cmd_params, &cmd_pdu_header,
2191 ptx_sgl, prx_sgl,
2192 NULL);
2193 if (rval)
2194 return -1;
2195
2196 spin_lock(&qedi_conn->list_lock);
2197 list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2198 cmd->io_cmd_in_list = true;
2199 qedi_conn->active_cmd_count++;
2200 spin_unlock(&qedi_conn->list_lock);
2201
2202 qedi_ring_doorbell(qedi_conn);
2203 return 0;
2204 }
2205
2206 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2207 {
2208 struct iscsi_task_params task_params;
2209 struct qedi_endpoint *ep;
2210 struct iscsi_conn *conn = task->conn;
2211 struct qedi_conn *qedi_conn = conn->dd_data;
2212 struct qedi_cmd *cmd = task->dd_data;
2213 u16 sq_idx = 0;
2214 int rval = 0;
2215
2216 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2217 "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2218 cmd->task_id, get_itt(task->itt), task->state,
2219 cmd->state, qedi_conn->iscsi_conn_id);
2220
2221 memset(&task_params, 0, sizeof(task_params));
2222 ep = qedi_conn->ep;
2223
2224 sq_idx = qedi_get_wqe_idx(qedi_conn);
2225
2226 task_params.sqe = &ep->sq[sq_idx];
2227 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2228 task_params.itid = cmd->task_id;
2229
2230 rval = init_cleanup_task(&task_params);
2231 if (rval)
2232 return rval;
2233
2234 qedi_ring_doorbell(qedi_conn);
2235 return 0;
2236 }
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