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