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 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 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 (!iscsi_cmd(sc_cmd)->task) {
607 QEDI_WARN(&qedi->dbg_ctx,
608 "NULL task pointer, 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 int found = 0;
736 struct qedi_cmd *qedi_cmd = NULL;
737 u32 iscsi_cid;
738 struct qedi_conn *qedi_conn;
739 struct qedi_cmd *dbg_cmd;
740 struct iscsi_task *mtask, *task;
741 struct iscsi_tm *tmf_hdr = NULL;
742
743 iscsi_cid = cqe->conn_id;
744 qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
745 if (!qedi_conn) {
746 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
747 "icid not found 0x%x\n", cqe->conn_id);
748 return;
749 }
750
751 /* Based on this itt get the corresponding qedi_cmd */
752 spin_lock_bh(&qedi_conn->tmf_work_lock);
753 list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
754 list) {
755 if (work->rtid == proto_itt) {
756 /* We found the command */
757 qedi_cmd = work->qedi_cmd;
758 if (!qedi_cmd->list_tmf_work) {
759 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
760 "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
761 proto_itt, qedi_conn->iscsi_conn_id);
762 WARN_ON(1);
763 }
764 found = 1;
765 mtask = qedi_cmd->task;
766 task = work->ctask;
767 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
768
769 list_del_init(&work->list);
770 kfree(work);
771 qedi_cmd->list_tmf_work = NULL;
772 }
773 }
774 spin_unlock_bh(&qedi_conn->tmf_work_lock);
775
776 if (!found)
777 goto check_cleanup_reqs;
778
779 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
780 "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
781 proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
782
783 spin_lock_bh(&conn->session->back_lock);
784 if (iscsi_task_is_completed(task)) {
785 QEDI_NOTICE(&qedi->dbg_ctx,
786 "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
787 get_itt(tmf_hdr->rtt), qedi_conn->iscsi_conn_id);
788 goto unlock;
789 }
790
791 dbg_cmd = task->dd_data;
792
793 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
794 "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
795 get_itt(tmf_hdr->rtt), get_itt(task->itt), dbg_cmd->task_id,
796 qedi_conn->iscsi_conn_id);
797
798 spin_lock(&qedi_conn->list_lock);
799 if (likely(dbg_cmd->io_cmd_in_list)) {
800 dbg_cmd->io_cmd_in_list = false;
801 list_del_init(&dbg_cmd->io_cmd);
802 qedi_conn->active_cmd_count--;
803 }
804 spin_unlock(&qedi_conn->list_lock);
805 qedi_cmd->state = CLEANUP_RECV;
806 unlock:
807 spin_unlock_bh(&conn->session->back_lock);
808 wake_up_interruptible(&qedi_conn->wait_queue);
809 return;
810
811 check_cleanup_reqs:
812 if (atomic_inc_return(&qedi_conn->cmd_cleanup_cmpl) ==
813 qedi_conn->cmd_cleanup_req) {
814 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
815 "Freeing tid=0x%x for cid=0x%x\n",
816 cqe->itid, qedi_conn->iscsi_conn_id);
817 wake_up(&qedi_conn->wait_queue);
818 }
819 }
820
qedi_fp_process_cqes(struct qedi_work * work)821 void qedi_fp_process_cqes(struct qedi_work *work)
822 {
823 struct qedi_ctx *qedi = work->qedi;
824 union iscsi_cqe *cqe = &work->cqe;
825 struct iscsi_task *task = NULL;
826 struct iscsi_nopout *nopout_hdr;
827 struct qedi_conn *q_conn;
828 struct iscsi_conn *conn;
829 struct qedi_cmd *qedi_cmd;
830 u32 comp_type;
831 u32 iscsi_cid;
832 u32 hdr_opcode;
833 u16 que_idx = work->que_idx;
834 u8 cqe_err_bits = 0;
835
836 comp_type = cqe->cqe_common.cqe_type;
837 hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
838 cqe_err_bits =
839 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
840
841 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
842 "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
843 cqe->cqe_common.conn_id, comp_type, hdr_opcode);
844
845 if (comp_type >= MAX_ISCSI_CQES_TYPE) {
846 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
847 return;
848 }
849
850 iscsi_cid = cqe->cqe_common.conn_id;
851 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
852 if (!q_conn) {
853 QEDI_WARN(&qedi->dbg_ctx,
854 "Session no longer exists for cid=0x%x!!\n",
855 iscsi_cid);
856 return;
857 }
858
859 conn = q_conn->cls_conn->dd_data;
860
861 if (unlikely(cqe_err_bits &&
862 GET_FIELD(cqe_err_bits,
863 CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
864 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
865 return;
866 }
867
868 switch (comp_type) {
869 case ISCSI_CQE_TYPE_SOLICITED:
870 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
871 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
872 task = qedi_cmd->task;
873 if (!task) {
874 QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
875 return;
876 }
877
878 /* Process NOPIN local completion */
879 nopout_hdr = (struct iscsi_nopout *)task->hdr;
880 if ((nopout_hdr->itt == RESERVED_ITT) &&
881 (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
882 qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
883 task, q_conn);
884 } else {
885 cqe->cqe_solicited.itid =
886 qedi_get_itt(cqe->cqe_solicited);
887 /* Process other solicited responses */
888 qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
889 }
890 break;
891 case ISCSI_CQE_TYPE_UNSOLICITED:
892 switch (hdr_opcode) {
893 case ISCSI_OPCODE_NOP_IN:
894 qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
895 que_idx);
896 break;
897 case ISCSI_OPCODE_ASYNC_MSG:
898 qedi_process_async_mesg(qedi, cqe, task, q_conn,
899 que_idx);
900 break;
901 case ISCSI_OPCODE_REJECT:
902 qedi_process_reject_mesg(qedi, cqe, task, q_conn,
903 que_idx);
904 break;
905 }
906 goto exit_fp_process;
907 case ISCSI_CQE_TYPE_DUMMY:
908 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
909 goto exit_fp_process;
910 case ISCSI_CQE_TYPE_TASK_CLEANUP:
911 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
912 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, conn);
913 goto exit_fp_process;
914 default:
915 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
916 break;
917 }
918
919 exit_fp_process:
920 return;
921 }
922
qedi_ring_doorbell(struct qedi_conn * qedi_conn)923 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
924 {
925 qedi_conn->ep->db_data.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
926
927 /* wmb - Make sure fw idx is coherent */
928 wmb();
929 writel(*(u32 *)&qedi_conn->ep->db_data, qedi_conn->ep->p_doorbell);
930
931 /* Make sure fw write idx is coherent, and include both memory barriers
932 * as a failsafe as for some architectures the call is the same but on
933 * others they are two different assembly operations.
934 */
935 wmb();
936 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
937 "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
938 qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
939 qedi_conn->iscsi_conn_id);
940 }
941
qedi_get_wqe_idx(struct qedi_conn * qedi_conn)942 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
943 {
944 struct qedi_endpoint *ep;
945 u16 rval;
946
947 ep = qedi_conn->ep;
948 rval = ep->sq_prod_idx;
949
950 /* Increament SQ index */
951 ep->sq_prod_idx++;
952 ep->fw_sq_prod_idx++;
953 if (ep->sq_prod_idx == QEDI_SQ_SIZE)
954 ep->sq_prod_idx = 0;
955
956 return rval;
957 }
958
qedi_send_iscsi_login(struct qedi_conn * qedi_conn,struct iscsi_task * task)959 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
960 struct iscsi_task *task)
961 {
962 struct iscsi_login_req_hdr login_req_pdu_header;
963 struct scsi_sgl_task_params tx_sgl_task_params;
964 struct scsi_sgl_task_params rx_sgl_task_params;
965 struct iscsi_task_params task_params;
966 struct iscsi_task_context *fw_task_ctx;
967 struct qedi_ctx *qedi = qedi_conn->qedi;
968 struct iscsi_login_req *login_hdr;
969 struct scsi_sge *resp_sge = NULL;
970 struct qedi_cmd *qedi_cmd;
971 struct qedi_endpoint *ep;
972 s16 tid = 0;
973 u16 sq_idx = 0;
974 int rval = 0;
975
976 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
977 qedi_cmd = (struct qedi_cmd *)task->dd_data;
978 ep = qedi_conn->ep;
979 login_hdr = (struct iscsi_login_req *)task->hdr;
980
981 tid = qedi_get_task_idx(qedi);
982 if (tid == -1)
983 return -ENOMEM;
984
985 fw_task_ctx =
986 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
987 tid);
988 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
989
990 qedi_cmd->task_id = tid;
991
992 memset(&task_params, 0, sizeof(task_params));
993 memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
994 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
995 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
996 /* Update header info */
997 login_req_pdu_header.opcode = login_hdr->opcode;
998 login_req_pdu_header.version_min = login_hdr->min_version;
999 login_req_pdu_header.version_max = login_hdr->max_version;
1000 login_req_pdu_header.flags_attr = login_hdr->flags;
1001 login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1002 login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1003
1004 login_req_pdu_header.tsih = login_hdr->tsih;
1005 login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1006
1007 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1008 login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1009 login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1010 login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1011 login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1012 login_req_pdu_header.exp_stat_sn = 0;
1013
1014 /* Fill tx AHS and rx buffer */
1015 tx_sgl_task_params.sgl =
1016 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1017 tx_sgl_task_params.sgl_phys_addr.lo =
1018 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1019 tx_sgl_task_params.sgl_phys_addr.hi =
1020 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1021 tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1022 tx_sgl_task_params.num_sges = 1;
1023
1024 rx_sgl_task_params.sgl =
1025 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1026 rx_sgl_task_params.sgl_phys_addr.lo =
1027 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1028 rx_sgl_task_params.sgl_phys_addr.hi =
1029 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1030 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1031 rx_sgl_task_params.num_sges = 1;
1032
1033 /* Fill fw input params */
1034 task_params.context = fw_task_ctx;
1035 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1036 task_params.itid = tid;
1037 task_params.cq_rss_number = 0;
1038 task_params.tx_io_size = ntoh24(login_hdr->dlength);
1039 task_params.rx_io_size = resp_sge->sge_len;
1040
1041 sq_idx = qedi_get_wqe_idx(qedi_conn);
1042 task_params.sqe = &ep->sq[sq_idx];
1043
1044 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1045 rval = init_initiator_login_request_task(&task_params,
1046 &login_req_pdu_header,
1047 &tx_sgl_task_params,
1048 &rx_sgl_task_params);
1049 if (rval)
1050 return -1;
1051
1052 spin_lock(&qedi_conn->list_lock);
1053 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1054 qedi_cmd->io_cmd_in_list = true;
1055 qedi_conn->active_cmd_count++;
1056 spin_unlock(&qedi_conn->list_lock);
1057
1058 qedi_ring_doorbell(qedi_conn);
1059 return 0;
1060 }
1061
qedi_send_iscsi_logout(struct qedi_conn * qedi_conn,struct iscsi_task * task)1062 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1063 struct iscsi_task *task)
1064 {
1065 struct iscsi_logout_req_hdr logout_pdu_header;
1066 struct scsi_sgl_task_params tx_sgl_task_params;
1067 struct scsi_sgl_task_params rx_sgl_task_params;
1068 struct iscsi_task_params task_params;
1069 struct iscsi_task_context *fw_task_ctx;
1070 struct iscsi_logout *logout_hdr = NULL;
1071 struct qedi_ctx *qedi = qedi_conn->qedi;
1072 struct qedi_cmd *qedi_cmd;
1073 struct qedi_endpoint *ep;
1074 s16 tid = 0;
1075 u16 sq_idx = 0;
1076 int rval = 0;
1077
1078 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1079 logout_hdr = (struct iscsi_logout *)task->hdr;
1080 ep = qedi_conn->ep;
1081
1082 tid = qedi_get_task_idx(qedi);
1083 if (tid == -1)
1084 return -ENOMEM;
1085
1086 fw_task_ctx =
1087 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1088 tid);
1089 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1090
1091 qedi_cmd->task_id = tid;
1092
1093 memset(&task_params, 0, sizeof(task_params));
1094 memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1095 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1096 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1097
1098 /* Update header info */
1099 logout_pdu_header.opcode = logout_hdr->opcode;
1100 logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1101 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1102 logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1103 logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1104 logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1105 logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1106
1107 /* Fill fw input params */
1108 task_params.context = fw_task_ctx;
1109 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1110 task_params.itid = tid;
1111 task_params.cq_rss_number = 0;
1112 task_params.tx_io_size = 0;
1113 task_params.rx_io_size = 0;
1114
1115 sq_idx = qedi_get_wqe_idx(qedi_conn);
1116 task_params.sqe = &ep->sq[sq_idx];
1117 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1118
1119 rval = init_initiator_logout_request_task(&task_params,
1120 &logout_pdu_header,
1121 NULL, NULL);
1122 if (rval)
1123 return -1;
1124
1125 spin_lock(&qedi_conn->list_lock);
1126 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1127 qedi_cmd->io_cmd_in_list = true;
1128 qedi_conn->active_cmd_count++;
1129 spin_unlock(&qedi_conn->list_lock);
1130
1131 qedi_ring_doorbell(qedi_conn);
1132 return 0;
1133 }
1134
qedi_cleanup_all_io(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn,struct iscsi_task * task,bool in_recovery)1135 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1136 struct iscsi_task *task, bool in_recovery)
1137 {
1138 int rval;
1139 struct iscsi_task *ctask;
1140 struct qedi_cmd *cmd, *cmd_tmp;
1141 struct iscsi_tm *tmf_hdr;
1142 unsigned int lun = 0;
1143 bool lun_reset = false;
1144 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1145 struct iscsi_session *session = conn->session;
1146
1147 /* From recovery, task is NULL or from tmf resp valid task */
1148 if (task) {
1149 tmf_hdr = (struct iscsi_tm *)task->hdr;
1150
1151 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1152 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1153 lun_reset = true;
1154 lun = scsilun_to_int(&tmf_hdr->lun);
1155 }
1156 }
1157
1158 qedi_conn->cmd_cleanup_req = 0;
1159 atomic_set(&qedi_conn->cmd_cleanup_cmpl, 0);
1160
1161 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1162 "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1163 qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1164 in_recovery, lun_reset);
1165
1166 if (lun_reset)
1167 spin_lock_bh(&session->back_lock);
1168
1169 spin_lock(&qedi_conn->list_lock);
1170
1171 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1172 io_cmd) {
1173 ctask = cmd->task;
1174 if (ctask == task)
1175 continue;
1176
1177 if (lun_reset) {
1178 if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1179 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1180 "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1181 cmd->task_id, get_itt(ctask->itt),
1182 cmd->scsi_cmd, cmd->scsi_cmd->device,
1183 ctask->state, cmd->state,
1184 qedi_conn->iscsi_conn_id);
1185 if (cmd->scsi_cmd->device->lun != lun)
1186 continue;
1187 }
1188 }
1189 qedi_conn->cmd_cleanup_req++;
1190 qedi_iscsi_cleanup_task(ctask, true);
1191
1192 cmd->io_cmd_in_list = false;
1193 list_del_init(&cmd->io_cmd);
1194 qedi_conn->active_cmd_count--;
1195 QEDI_WARN(&qedi->dbg_ctx,
1196 "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1197 &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1198 }
1199
1200 spin_unlock(&qedi_conn->list_lock);
1201
1202 if (lun_reset)
1203 spin_unlock_bh(&session->back_lock);
1204
1205 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1206 "cmd_cleanup_req=%d, cid=0x%x\n",
1207 qedi_conn->cmd_cleanup_req,
1208 qedi_conn->iscsi_conn_id);
1209
1210 rval = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1211 (qedi_conn->cmd_cleanup_req ==
1212 atomic_read(&qedi_conn->cmd_cleanup_cmpl)) ||
1213 test_bit(QEDI_IN_RECOVERY, &qedi->flags),
1214 5 * HZ);
1215 if (rval) {
1216 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1217 "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1218 qedi_conn->cmd_cleanup_req,
1219 atomic_read(&qedi_conn->cmd_cleanup_cmpl),
1220 qedi_conn->iscsi_conn_id);
1221
1222 return 0;
1223 }
1224
1225 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1226 "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1227 qedi_conn->cmd_cleanup_req,
1228 atomic_read(&qedi_conn->cmd_cleanup_cmpl),
1229 qedi_conn->iscsi_conn_id);
1230
1231 iscsi_host_for_each_session(qedi->shost,
1232 qedi_mark_device_missing);
1233 qedi_ops->common->drain(qedi->cdev);
1234
1235 /* Enable IOs for all other sessions except current.*/
1236 if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1237 (qedi_conn->cmd_cleanup_req ==
1238 atomic_read(&qedi_conn->cmd_cleanup_cmpl)) ||
1239 test_bit(QEDI_IN_RECOVERY, &qedi->flags),
1240 5 * HZ)) {
1241 iscsi_host_for_each_session(qedi->shost,
1242 qedi_mark_device_available);
1243 return -1;
1244 }
1245
1246 iscsi_host_for_each_session(qedi->shost,
1247 qedi_mark_device_available);
1248
1249 return 0;
1250 }
1251
qedi_clearsq(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn,struct iscsi_task * task)1252 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1253 struct iscsi_task *task)
1254 {
1255 struct qedi_endpoint *qedi_ep;
1256 int rval;
1257
1258 qedi_ep = qedi_conn->ep;
1259 qedi_conn->cmd_cleanup_req = 0;
1260 atomic_set(&qedi_conn->cmd_cleanup_cmpl, 0);
1261
1262 if (!qedi_ep) {
1263 QEDI_WARN(&qedi->dbg_ctx,
1264 "Cannot proceed, ep already disconnected, cid=0x%x\n",
1265 qedi_conn->iscsi_conn_id);
1266 return;
1267 }
1268
1269 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1270 "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1271 qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1272
1273 qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1274
1275 rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1276 if (rval) {
1277 QEDI_ERR(&qedi->dbg_ctx,
1278 "fatal error, need hard reset, cid=0x%x\n",
1279 qedi_conn->iscsi_conn_id);
1280 WARN_ON(1);
1281 }
1282 }
1283
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)1284 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1285 struct qedi_conn *qedi_conn,
1286 struct iscsi_task *task,
1287 struct qedi_cmd *qedi_cmd,
1288 struct qedi_work_map *list_work)
1289 {
1290 struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1291 int wait;
1292
1293 wait = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1294 ((qedi_cmd->state ==
1295 CLEANUP_RECV) ||
1296 ((qedi_cmd->type == TYPEIO) &&
1297 (cmd->state ==
1298 RESPONSE_RECEIVED))),
1299 5 * HZ);
1300 if (!wait) {
1301 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1302
1303 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1304 "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1305 cmd->task_id, qedi_conn->iscsi_conn_id);
1306
1307 return -1;
1308 }
1309 return 0;
1310 }
1311
qedi_abort_work(struct work_struct * work)1312 static void qedi_abort_work(struct work_struct *work)
1313 {
1314 struct qedi_cmd *qedi_cmd =
1315 container_of(work, struct qedi_cmd, tmf_work);
1316 struct qedi_conn *qedi_conn = qedi_cmd->conn;
1317 struct qedi_ctx *qedi = qedi_conn->qedi;
1318 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1319 struct qedi_work_map *list_work = NULL;
1320 struct iscsi_task *mtask;
1321 struct qedi_cmd *cmd;
1322 struct iscsi_task *ctask;
1323 struct iscsi_tm *tmf_hdr;
1324 s16 rval = 0;
1325
1326 mtask = qedi_cmd->task;
1327 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1328
1329 spin_lock_bh(&conn->session->back_lock);
1330 ctask = iscsi_itt_to_ctask(conn, tmf_hdr->rtt);
1331 if (!ctask) {
1332 spin_unlock_bh(&conn->session->back_lock);
1333 QEDI_ERR(&qedi->dbg_ctx, "Invalid RTT. Letting abort timeout.\n");
1334 goto clear_cleanup;
1335 }
1336
1337 if (iscsi_task_is_completed(ctask)) {
1338 spin_unlock_bh(&conn->session->back_lock);
1339 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1340 "Task already completed\n");
1341 /*
1342 * We have to still send the TMF because libiscsi needs the
1343 * response to avoid a timeout.
1344 */
1345 goto send_tmf;
1346 }
1347 spin_unlock_bh(&conn->session->back_lock);
1348
1349 cmd = (struct qedi_cmd *)ctask->dd_data;
1350 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1351 "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1352 get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1353 qedi_conn->iscsi_conn_id);
1354
1355 if (qedi_do_not_recover) {
1356 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1357 qedi_do_not_recover);
1358 goto clear_cleanup;
1359 }
1360
1361 list_work = kzalloc(sizeof(*list_work), GFP_NOIO);
1362 if (!list_work) {
1363 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1364 goto clear_cleanup;
1365 }
1366
1367 qedi_cmd->type = TYPEIO;
1368 qedi_cmd->state = CLEANUP_WAIT;
1369 list_work->qedi_cmd = qedi_cmd;
1370 list_work->rtid = cmd->task_id;
1371 list_work->state = QEDI_WORK_SCHEDULED;
1372 list_work->ctask = ctask;
1373 qedi_cmd->list_tmf_work = list_work;
1374
1375 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1376 "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1377 list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1378 tmf_hdr->flags);
1379
1380 spin_lock_bh(&qedi_conn->tmf_work_lock);
1381 list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1382 spin_unlock_bh(&qedi_conn->tmf_work_lock);
1383
1384 qedi_iscsi_cleanup_task(ctask, false);
1385
1386 rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1387 list_work);
1388 if (rval == -1) {
1389 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1390 "FW cleanup got escalated, cid=0x%x\n",
1391 qedi_conn->iscsi_conn_id);
1392 goto ldel_exit;
1393 }
1394
1395 send_tmf:
1396 send_iscsi_tmf(qedi_conn, qedi_cmd->task, ctask);
1397 goto clear_cleanup;
1398
1399 ldel_exit:
1400 spin_lock_bh(&qedi_conn->tmf_work_lock);
1401 if (qedi_cmd->list_tmf_work) {
1402 list_del_init(&list_work->list);
1403 qedi_cmd->list_tmf_work = NULL;
1404 kfree(list_work);
1405 }
1406 spin_unlock_bh(&qedi_conn->tmf_work_lock);
1407
1408 spin_lock(&qedi_conn->list_lock);
1409 if (likely(cmd->io_cmd_in_list)) {
1410 cmd->io_cmd_in_list = false;
1411 list_del_init(&cmd->io_cmd);
1412 qedi_conn->active_cmd_count--;
1413 }
1414 spin_unlock(&qedi_conn->list_lock);
1415
1416 clear_cleanup:
1417 spin_lock(&qedi_conn->tmf_work_lock);
1418 qedi_conn->fw_cleanup_works--;
1419 spin_unlock(&qedi_conn->tmf_work_lock);
1420 }
1421
send_iscsi_tmf(struct qedi_conn * qedi_conn,struct iscsi_task * mtask,struct iscsi_task * ctask)1422 static int send_iscsi_tmf(struct qedi_conn *qedi_conn, struct iscsi_task *mtask,
1423 struct iscsi_task *ctask)
1424 {
1425 struct iscsi_tmf_request_hdr tmf_pdu_header;
1426 struct iscsi_task_params task_params;
1427 struct qedi_ctx *qedi = qedi_conn->qedi;
1428 struct iscsi_task_context *fw_task_ctx;
1429 struct iscsi_tm *tmf_hdr;
1430 struct qedi_cmd *qedi_cmd;
1431 struct qedi_cmd *cmd;
1432 struct qedi_endpoint *ep;
1433 u32 scsi_lun[2];
1434 s16 tid = 0;
1435 u16 sq_idx = 0;
1436
1437 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1438 qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1439 ep = qedi_conn->ep;
1440 if (!ep)
1441 return -ENODEV;
1442
1443 tid = qedi_get_task_idx(qedi);
1444 if (tid == -1)
1445 return -ENOMEM;
1446
1447 fw_task_ctx =
1448 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1449 tid);
1450 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1451
1452 qedi_cmd->task_id = tid;
1453
1454 memset(&task_params, 0, sizeof(task_params));
1455 memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1456
1457 /* Update header info */
1458 qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1459 tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1460 tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1461
1462 memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1463 tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1464 tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1465
1466 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1467 ISCSI_TM_FUNC_ABORT_TASK) {
1468 cmd = (struct qedi_cmd *)ctask->dd_data;
1469 tmf_pdu_header.rtt =
1470 qedi_set_itt(cmd->task_id,
1471 get_itt(tmf_hdr->rtt));
1472 } else {
1473 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1474 }
1475
1476 tmf_pdu_header.opcode = tmf_hdr->opcode;
1477 tmf_pdu_header.function = tmf_hdr->flags;
1478 tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1479 tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1480
1481 /* Fill fw input params */
1482 task_params.context = fw_task_ctx;
1483 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1484 task_params.itid = tid;
1485 task_params.cq_rss_number = 0;
1486 task_params.tx_io_size = 0;
1487 task_params.rx_io_size = 0;
1488
1489 sq_idx = qedi_get_wqe_idx(qedi_conn);
1490 task_params.sqe = &ep->sq[sq_idx];
1491
1492 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1493 init_initiator_tmf_request_task(&task_params, &tmf_pdu_header);
1494
1495 spin_lock(&qedi_conn->list_lock);
1496 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1497 qedi_cmd->io_cmd_in_list = true;
1498 qedi_conn->active_cmd_count++;
1499 spin_unlock(&qedi_conn->list_lock);
1500
1501 qedi_ring_doorbell(qedi_conn);
1502 return 0;
1503 }
1504
qedi_send_iscsi_tmf(struct qedi_conn * qedi_conn,struct iscsi_task * mtask)1505 int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn, struct iscsi_task *mtask)
1506 {
1507 struct iscsi_tm *tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1508 struct qedi_cmd *qedi_cmd = mtask->dd_data;
1509 struct qedi_ctx *qedi = qedi_conn->qedi;
1510 int rc = 0;
1511
1512 switch (tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
1513 case ISCSI_TM_FUNC_ABORT_TASK:
1514 spin_lock(&qedi_conn->tmf_work_lock);
1515 qedi_conn->fw_cleanup_works++;
1516 spin_unlock(&qedi_conn->tmf_work_lock);
1517
1518 INIT_WORK(&qedi_cmd->tmf_work, qedi_abort_work);
1519 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1520 break;
1521 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
1522 case ISCSI_TM_FUNC_TARGET_WARM_RESET:
1523 case ISCSI_TM_FUNC_TARGET_COLD_RESET:
1524 rc = send_iscsi_tmf(qedi_conn, mtask, NULL);
1525 break;
1526 default:
1527 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1528 qedi_conn->iscsi_conn_id);
1529 return -EINVAL;
1530 }
1531
1532 return rc;
1533 }
1534
qedi_send_iscsi_text(struct qedi_conn * qedi_conn,struct iscsi_task * task)1535 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1536 struct iscsi_task *task)
1537 {
1538 struct iscsi_text_request_hdr text_request_pdu_header;
1539 struct scsi_sgl_task_params tx_sgl_task_params;
1540 struct scsi_sgl_task_params rx_sgl_task_params;
1541 struct iscsi_task_params task_params;
1542 struct iscsi_task_context *fw_task_ctx;
1543 struct qedi_ctx *qedi = qedi_conn->qedi;
1544 struct iscsi_text *text_hdr;
1545 struct scsi_sge *req_sge = NULL;
1546 struct scsi_sge *resp_sge = NULL;
1547 struct qedi_cmd *qedi_cmd;
1548 struct qedi_endpoint *ep;
1549 s16 tid = 0;
1550 u16 sq_idx = 0;
1551 int rval = 0;
1552
1553 req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1554 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1555 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1556 text_hdr = (struct iscsi_text *)task->hdr;
1557 ep = qedi_conn->ep;
1558
1559 tid = qedi_get_task_idx(qedi);
1560 if (tid == -1)
1561 return -ENOMEM;
1562
1563 fw_task_ctx =
1564 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1565 tid);
1566 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1567
1568 qedi_cmd->task_id = tid;
1569
1570 memset(&task_params, 0, sizeof(task_params));
1571 memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1572 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1573 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1574
1575 /* Update header info */
1576 text_request_pdu_header.opcode = text_hdr->opcode;
1577 text_request_pdu_header.flags_attr = text_hdr->flags;
1578
1579 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1580 text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1581 text_request_pdu_header.ttt = text_hdr->ttt;
1582 text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1583 text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1584 text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1585
1586 /* Fill tx AHS and rx buffer */
1587 tx_sgl_task_params.sgl =
1588 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1589 tx_sgl_task_params.sgl_phys_addr.lo =
1590 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1591 tx_sgl_task_params.sgl_phys_addr.hi =
1592 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1593 tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1594 tx_sgl_task_params.num_sges = 1;
1595
1596 rx_sgl_task_params.sgl =
1597 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1598 rx_sgl_task_params.sgl_phys_addr.lo =
1599 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1600 rx_sgl_task_params.sgl_phys_addr.hi =
1601 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1602 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1603 rx_sgl_task_params.num_sges = 1;
1604
1605 /* Fill fw input params */
1606 task_params.context = fw_task_ctx;
1607 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1608 task_params.itid = tid;
1609 task_params.cq_rss_number = 0;
1610 task_params.tx_io_size = ntoh24(text_hdr->dlength);
1611 task_params.rx_io_size = resp_sge->sge_len;
1612
1613 sq_idx = qedi_get_wqe_idx(qedi_conn);
1614 task_params.sqe = &ep->sq[sq_idx];
1615
1616 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1617 rval = init_initiator_text_request_task(&task_params,
1618 &text_request_pdu_header,
1619 &tx_sgl_task_params,
1620 &rx_sgl_task_params);
1621 if (rval)
1622 return -1;
1623
1624 spin_lock(&qedi_conn->list_lock);
1625 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1626 qedi_cmd->io_cmd_in_list = true;
1627 qedi_conn->active_cmd_count++;
1628 spin_unlock(&qedi_conn->list_lock);
1629
1630 qedi_ring_doorbell(qedi_conn);
1631 return 0;
1632 }
1633
qedi_send_iscsi_nopout(struct qedi_conn * qedi_conn,struct iscsi_task * task,char * datap,int data_len,int unsol)1634 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1635 struct iscsi_task *task,
1636 char *datap, int data_len, int unsol)
1637 {
1638 struct iscsi_nop_out_hdr nop_out_pdu_header;
1639 struct scsi_sgl_task_params tx_sgl_task_params;
1640 struct scsi_sgl_task_params rx_sgl_task_params;
1641 struct iscsi_task_params task_params;
1642 struct qedi_ctx *qedi = qedi_conn->qedi;
1643 struct iscsi_task_context *fw_task_ctx;
1644 struct iscsi_nopout *nopout_hdr;
1645 struct scsi_sge *resp_sge = NULL;
1646 struct qedi_cmd *qedi_cmd;
1647 struct qedi_endpoint *ep;
1648 u32 scsi_lun[2];
1649 s16 tid = 0;
1650 u16 sq_idx = 0;
1651 int rval = 0;
1652
1653 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1654 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1655 nopout_hdr = (struct iscsi_nopout *)task->hdr;
1656 ep = qedi_conn->ep;
1657
1658 tid = qedi_get_task_idx(qedi);
1659 if (tid == -1)
1660 return -ENOMEM;
1661
1662 fw_task_ctx =
1663 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1664 tid);
1665 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
1666
1667 qedi_cmd->task_id = tid;
1668
1669 memset(&task_params, 0, sizeof(task_params));
1670 memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1671 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1672 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1673
1674 /* Update header info */
1675 nop_out_pdu_header.opcode = nopout_hdr->opcode;
1676 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1677 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1678
1679 memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1680 nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1681 nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1682 nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1683 nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1684
1685 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1686
1687 if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1688 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1689 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1690 } else {
1691 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1692 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1693
1694 spin_lock(&qedi_conn->list_lock);
1695 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1696 qedi_cmd->io_cmd_in_list = true;
1697 qedi_conn->active_cmd_count++;
1698 spin_unlock(&qedi_conn->list_lock);
1699 }
1700
1701 /* Fill tx AHS and rx buffer */
1702 if (data_len) {
1703 tx_sgl_task_params.sgl =
1704 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1705 tx_sgl_task_params.sgl_phys_addr.lo =
1706 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1707 tx_sgl_task_params.sgl_phys_addr.hi =
1708 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1709 tx_sgl_task_params.total_buffer_size = data_len;
1710 tx_sgl_task_params.num_sges = 1;
1711
1712 rx_sgl_task_params.sgl =
1713 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1714 rx_sgl_task_params.sgl_phys_addr.lo =
1715 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1716 rx_sgl_task_params.sgl_phys_addr.hi =
1717 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1718 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1719 rx_sgl_task_params.num_sges = 1;
1720 }
1721
1722 /* Fill fw input params */
1723 task_params.context = fw_task_ctx;
1724 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1725 task_params.itid = tid;
1726 task_params.cq_rss_number = 0;
1727 task_params.tx_io_size = data_len;
1728 task_params.rx_io_size = resp_sge->sge_len;
1729
1730 sq_idx = qedi_get_wqe_idx(qedi_conn);
1731 task_params.sqe = &ep->sq[sq_idx];
1732
1733 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1734 rval = init_initiator_nop_out_task(&task_params,
1735 &nop_out_pdu_header,
1736 &tx_sgl_task_params,
1737 &rx_sgl_task_params);
1738 if (rval)
1739 return -1;
1740
1741 qedi_ring_doorbell(qedi_conn);
1742 return 0;
1743 }
1744
qedi_split_bd(struct qedi_cmd * cmd,u64 addr,int sg_len,int bd_index)1745 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1746 int bd_index)
1747 {
1748 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1749 int frag_size, sg_frags;
1750
1751 sg_frags = 0;
1752
1753 while (sg_len) {
1754 if (addr % QEDI_PAGE_SIZE)
1755 frag_size =
1756 (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1757 else
1758 frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1759 (sg_len % QEDI_BD_SPLIT_SZ);
1760
1761 if (frag_size == 0)
1762 frag_size = QEDI_BD_SPLIT_SZ;
1763
1764 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1765 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1766 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1767 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1768 "split sge %d: addr=%llx, len=%x",
1769 (bd_index + sg_frags), addr, frag_size);
1770
1771 addr += (u64)frag_size;
1772 sg_frags++;
1773 sg_len -= frag_size;
1774 }
1775 return sg_frags;
1776 }
1777
qedi_map_scsi_sg(struct qedi_ctx * qedi,struct qedi_cmd * cmd)1778 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1779 {
1780 struct scsi_cmnd *sc = cmd->scsi_cmd;
1781 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1782 struct scatterlist *sg;
1783 int byte_count = 0;
1784 int bd_count = 0;
1785 int sg_count;
1786 int sg_len;
1787 int sg_frags;
1788 u64 addr, end_addr;
1789 int i;
1790
1791 WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1792
1793 sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1794 scsi_sg_count(sc), sc->sc_data_direction);
1795
1796 /*
1797 * New condition to send single SGE as cached-SGL.
1798 * Single SGE with length less than 64K.
1799 */
1800 sg = scsi_sglist(sc);
1801 if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1802 sg_len = sg_dma_len(sg);
1803 addr = (u64)sg_dma_address(sg);
1804
1805 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1806 bd[bd_count].sge_addr.hi = (addr >> 32);
1807 bd[bd_count].sge_len = (u16)sg_len;
1808
1809 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1810 "single-cached-sgl: bd_count:%d addr=%llx, len=%x",
1811 sg_count, addr, sg_len);
1812
1813 return ++bd_count;
1814 }
1815
1816 scsi_for_each_sg(sc, sg, sg_count, i) {
1817 sg_len = sg_dma_len(sg);
1818 addr = (u64)sg_dma_address(sg);
1819 end_addr = (addr + sg_len);
1820
1821 /*
1822 * first sg elem in the 'list',
1823 * check if end addr is page-aligned.
1824 */
1825 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1826 cmd->use_slowpath = true;
1827
1828 /*
1829 * last sg elem in the 'list',
1830 * check if start addr is page-aligned.
1831 */
1832 else if ((i == (sg_count - 1)) &&
1833 (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1834 cmd->use_slowpath = true;
1835
1836 /*
1837 * middle sg elements in list,
1838 * check if start and end addr is page-aligned
1839 */
1840 else if ((i != 0) && (i != (sg_count - 1)) &&
1841 ((addr % QEDI_PAGE_SIZE) ||
1842 (end_addr % QEDI_PAGE_SIZE)))
1843 cmd->use_slowpath = true;
1844
1845 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1846 i, sg_len);
1847
1848 if (sg_len > QEDI_BD_SPLIT_SZ) {
1849 sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1850 } else {
1851 sg_frags = 1;
1852 bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1853 bd[bd_count].sge_addr.hi = addr >> 32;
1854 bd[bd_count].sge_len = sg_len;
1855 }
1856 byte_count += sg_len;
1857 bd_count += sg_frags;
1858 }
1859
1860 if (byte_count != scsi_bufflen(sc))
1861 QEDI_ERR(&qedi->dbg_ctx,
1862 "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1863 scsi_bufflen(sc));
1864 else
1865 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1866 byte_count);
1867
1868 WARN_ON(byte_count != scsi_bufflen(sc));
1869
1870 return bd_count;
1871 }
1872
qedi_iscsi_map_sg_list(struct qedi_cmd * cmd)1873 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1874 {
1875 int bd_count;
1876 struct scsi_cmnd *sc = cmd->scsi_cmd;
1877
1878 if (scsi_sg_count(sc)) {
1879 bd_count = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1880 if (bd_count == 0)
1881 return;
1882 } else {
1883 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1884
1885 bd[0].sge_addr.lo = 0;
1886 bd[0].sge_addr.hi = 0;
1887 bd[0].sge_len = 0;
1888 bd_count = 0;
1889 }
1890 cmd->io_tbl.sge_valid = bd_count;
1891 }
1892
qedi_cpy_scsi_cdb(struct scsi_cmnd * sc,u32 * dstp)1893 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1894 {
1895 u32 dword;
1896 int lpcnt;
1897 u8 *srcp;
1898
1899 lpcnt = sc->cmd_len / sizeof(dword);
1900 srcp = (u8 *)sc->cmnd;
1901 while (lpcnt--) {
1902 memcpy(&dword, (const void *)srcp, 4);
1903 *dstp = cpu_to_be32(dword);
1904 srcp += 4;
1905 dstp++;
1906 }
1907 if (sc->cmd_len & 0x3) {
1908 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1909 *dstp = cpu_to_be32(dword);
1910 }
1911 }
1912
qedi_trace_io(struct qedi_ctx * qedi,struct iscsi_task * task,u16 tid,int8_t direction)1913 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
1914 u16 tid, int8_t direction)
1915 {
1916 struct qedi_io_log *io_log;
1917 struct iscsi_conn *conn = task->conn;
1918 struct qedi_conn *qedi_conn = conn->dd_data;
1919 struct scsi_cmnd *sc_cmd = task->sc;
1920 unsigned long flags;
1921
1922 spin_lock_irqsave(&qedi->io_trace_lock, flags);
1923
1924 io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
1925 io_log->direction = direction;
1926 io_log->task_id = tid;
1927 io_log->cid = qedi_conn->iscsi_conn_id;
1928 io_log->lun = sc_cmd->device->lun;
1929 io_log->op = sc_cmd->cmnd[0];
1930 io_log->lba[0] = sc_cmd->cmnd[2];
1931 io_log->lba[1] = sc_cmd->cmnd[3];
1932 io_log->lba[2] = sc_cmd->cmnd[4];
1933 io_log->lba[3] = sc_cmd->cmnd[5];
1934 io_log->bufflen = scsi_bufflen(sc_cmd);
1935 io_log->sg_count = scsi_sg_count(sc_cmd);
1936 io_log->fast_sgs = qedi->fast_sgls;
1937 io_log->cached_sgs = qedi->cached_sgls;
1938 io_log->slow_sgs = qedi->slow_sgls;
1939 io_log->cached_sge = qedi->use_cached_sge;
1940 io_log->slow_sge = qedi->use_slow_sge;
1941 io_log->fast_sge = qedi->use_fast_sge;
1942 io_log->result = sc_cmd->result;
1943 io_log->jiffies = jiffies;
1944 io_log->blk_req_cpu = smp_processor_id();
1945
1946 if (direction == QEDI_IO_TRACE_REQ) {
1947 /* For requests we only care about the submission CPU */
1948 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
1949 io_log->intr_cpu = 0;
1950 io_log->blk_rsp_cpu = 0;
1951 } else if (direction == QEDI_IO_TRACE_RSP) {
1952 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
1953 io_log->intr_cpu = qedi->intr_cpu;
1954 io_log->blk_rsp_cpu = smp_processor_id();
1955 }
1956
1957 qedi->io_trace_idx++;
1958 if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
1959 qedi->io_trace_idx = 0;
1960
1961 qedi->use_cached_sge = false;
1962 qedi->use_slow_sge = false;
1963 qedi->use_fast_sge = false;
1964
1965 spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
1966 }
1967
qedi_iscsi_send_ioreq(struct iscsi_task * task)1968 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
1969 {
1970 struct iscsi_conn *conn = task->conn;
1971 struct iscsi_session *session = conn->session;
1972 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1973 struct qedi_ctx *qedi = iscsi_host_priv(shost);
1974 struct qedi_conn *qedi_conn = conn->dd_data;
1975 struct qedi_cmd *cmd = task->dd_data;
1976 struct scsi_cmnd *sc = task->sc;
1977 struct iscsi_cmd_hdr cmd_pdu_header;
1978 struct scsi_sgl_task_params tx_sgl_task_params;
1979 struct scsi_sgl_task_params rx_sgl_task_params;
1980 struct scsi_sgl_task_params *prx_sgl = NULL;
1981 struct scsi_sgl_task_params *ptx_sgl = NULL;
1982 struct iscsi_task_params task_params;
1983 struct iscsi_conn_params conn_params;
1984 struct scsi_initiator_cmd_params cmd_params;
1985 struct iscsi_task_context *fw_task_ctx;
1986 struct iscsi_cls_conn *cls_conn;
1987 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
1988 enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
1989 struct qedi_endpoint *ep;
1990 u32 scsi_lun[2];
1991 s16 tid = 0;
1992 u16 sq_idx = 0;
1993 u16 cq_idx;
1994 int rval = 0;
1995
1996 ep = qedi_conn->ep;
1997 cls_conn = qedi_conn->cls_conn;
1998 conn = cls_conn->dd_data;
1999
2000 qedi_iscsi_map_sg_list(cmd);
2001 int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2002
2003 tid = qedi_get_task_idx(qedi);
2004 if (tid == -1)
2005 return -ENOMEM;
2006
2007 fw_task_ctx =
2008 (struct iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2009 tid);
2010 memset(fw_task_ctx, 0, sizeof(struct iscsi_task_context));
2011
2012 cmd->task_id = tid;
2013
2014 memset(&task_params, 0, sizeof(task_params));
2015 memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2016 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2017 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2018 memset(&conn_params, 0, sizeof(conn_params));
2019 memset(&cmd_params, 0, sizeof(cmd_params));
2020
2021 cq_idx = smp_processor_id() % qedi->num_queues;
2022 /* Update header info */
2023 SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2024 ISCSI_ATTR_SIMPLE);
2025 if (hdr->cdb[0] != TEST_UNIT_READY) {
2026 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2027 SET_FIELD(cmd_pdu_header.flags_attr,
2028 ISCSI_CMD_HDR_WRITE, 1);
2029 task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2030 } else {
2031 SET_FIELD(cmd_pdu_header.flags_attr,
2032 ISCSI_CMD_HDR_READ, 1);
2033 task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2034 }
2035 }
2036
2037 cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2038 cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2039
2040 qedi_update_itt_map(qedi, tid, task->itt, cmd);
2041 cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2042 cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2043 cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2044 cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2045 cmd_pdu_header.hdr_first_byte = hdr->opcode;
2046 qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2047
2048 /* Fill tx AHS and rx buffer */
2049 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2050 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2051 tx_sgl_task_params.sgl_phys_addr.lo =
2052 (u32)(cmd->io_tbl.sge_tbl_dma);
2053 tx_sgl_task_params.sgl_phys_addr.hi =
2054 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2055 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2056 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2057 if (cmd->use_slowpath)
2058 tx_sgl_task_params.small_mid_sge = true;
2059 } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2060 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2061 rx_sgl_task_params.sgl_phys_addr.lo =
2062 (u32)(cmd->io_tbl.sge_tbl_dma);
2063 rx_sgl_task_params.sgl_phys_addr.hi =
2064 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2065 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2066 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2067 }
2068
2069 /* Add conn param */
2070 conn_params.first_burst_length = conn->session->first_burst;
2071 conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2072 conn_params.max_burst_length = conn->session->max_burst;
2073 if (conn->session->initial_r2t_en)
2074 conn_params.initial_r2t = true;
2075 if (conn->session->imm_data_en)
2076 conn_params.immediate_data = true;
2077
2078 /* Add cmd params */
2079 cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2080 cmd_params.sense_data_buffer_phys_addr.hi =
2081 (u32)((u64)cmd->sense_buffer_dma >> 32);
2082 /* Fill fw input params */
2083 task_params.context = fw_task_ctx;
2084 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2085 task_params.itid = tid;
2086 task_params.cq_rss_number = cq_idx;
2087 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2088 task_params.tx_io_size = scsi_bufflen(sc);
2089 else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2090 task_params.rx_io_size = scsi_bufflen(sc);
2091
2092 sq_idx = qedi_get_wqe_idx(qedi_conn);
2093 task_params.sqe = &ep->sq[sq_idx];
2094
2095 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2096 "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2097 (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2098 "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2099 "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2100 (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2101 (u32)(cmd->io_tbl.sge_tbl_dma),
2102 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2103
2104 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2105
2106 if (task_params.tx_io_size != 0)
2107 ptx_sgl = &tx_sgl_task_params;
2108 if (task_params.rx_io_size != 0)
2109 prx_sgl = &rx_sgl_task_params;
2110
2111 rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2112 &cmd_params, &cmd_pdu_header,
2113 ptx_sgl, prx_sgl,
2114 NULL);
2115 if (rval)
2116 return -1;
2117
2118 spin_lock(&qedi_conn->list_lock);
2119 list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2120 cmd->io_cmd_in_list = true;
2121 qedi_conn->active_cmd_count++;
2122 spin_unlock(&qedi_conn->list_lock);
2123
2124 qedi_ring_doorbell(qedi_conn);
2125 return 0;
2126 }
2127
qedi_iscsi_cleanup_task(struct iscsi_task * task,bool mark_cmd_node_deleted)2128 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2129 {
2130 struct iscsi_task_params task_params;
2131 struct qedi_endpoint *ep;
2132 struct iscsi_conn *conn = task->conn;
2133 struct qedi_conn *qedi_conn = conn->dd_data;
2134 struct qedi_cmd *cmd = task->dd_data;
2135 u16 sq_idx = 0;
2136 int rval = 0;
2137
2138 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2139 "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2140 cmd->task_id, get_itt(task->itt), task->state,
2141 cmd->state, qedi_conn->iscsi_conn_id);
2142
2143 memset(&task_params, 0, sizeof(task_params));
2144 ep = qedi_conn->ep;
2145
2146 sq_idx = qedi_get_wqe_idx(qedi_conn);
2147
2148 task_params.sqe = &ep->sq[sq_idx];
2149 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2150 task_params.itid = cmd->task_id;
2151
2152 rval = init_cleanup_task(&task_params);
2153 if (rval)
2154 return rval;
2155
2156 qedi_ring_doorbell(qedi_conn);
2157 return 0;
2158 }
2159