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
776 if (!found) {
777 spin_unlock_bh(&qedi_conn->tmf_work_lock);
778 goto check_cleanup_reqs;
779 }
780
781 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
782 "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
783 proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
784
785 spin_lock_bh(&conn->session->back_lock);
786 if (iscsi_task_is_completed(task)) {
787 QEDI_NOTICE(&qedi->dbg_ctx,
788 "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
789 get_itt(tmf_hdr->rtt), qedi_conn->iscsi_conn_id);
790 goto unlock;
791 }
792
793 dbg_cmd = task->dd_data;
794
795 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
796 "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
797 get_itt(tmf_hdr->rtt), get_itt(task->itt), dbg_cmd->task_id,
798 qedi_conn->iscsi_conn_id);
799
800 spin_lock(&qedi_conn->list_lock);
801 if (likely(dbg_cmd->io_cmd_in_list)) {
802 dbg_cmd->io_cmd_in_list = false;
803 list_del_init(&dbg_cmd->io_cmd);
804 qedi_conn->active_cmd_count--;
805 }
806 spin_unlock(&qedi_conn->list_lock);
807 qedi_cmd->state = CLEANUP_RECV;
808 unlock:
809 spin_unlock_bh(&conn->session->back_lock);
810 spin_unlock_bh(&qedi_conn->tmf_work_lock);
811 wake_up_interruptible(&qedi_conn->wait_queue);
812 return;
813
814 check_cleanup_reqs:
815 if (qedi_conn->cmd_cleanup_req > 0) {
816 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
817 "Freeing tid=0x%x for cid=0x%x\n",
818 cqe->itid, qedi_conn->iscsi_conn_id);
819 qedi_conn->cmd_cleanup_cmpl++;
820 wake_up(&qedi_conn->wait_queue);
821 } else {
822 QEDI_ERR(&qedi->dbg_ctx,
823 "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x\n",
824 protoitt, cqe->itid, qedi_conn->iscsi_conn_id);
825 }
826 }
827
qedi_fp_process_cqes(struct qedi_work * work)828 void qedi_fp_process_cqes(struct qedi_work *work)
829 {
830 struct qedi_ctx *qedi = work->qedi;
831 union iscsi_cqe *cqe = &work->cqe;
832 struct iscsi_task *task = NULL;
833 struct iscsi_nopout *nopout_hdr;
834 struct qedi_conn *q_conn;
835 struct iscsi_conn *conn;
836 struct qedi_cmd *qedi_cmd;
837 u32 comp_type;
838 u32 iscsi_cid;
839 u32 hdr_opcode;
840 u16 que_idx = work->que_idx;
841 u8 cqe_err_bits = 0;
842
843 comp_type = cqe->cqe_common.cqe_type;
844 hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
845 cqe_err_bits =
846 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
847
848 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
849 "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
850 cqe->cqe_common.conn_id, comp_type, hdr_opcode);
851
852 if (comp_type >= MAX_ISCSI_CQES_TYPE) {
853 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
854 return;
855 }
856
857 iscsi_cid = cqe->cqe_common.conn_id;
858 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
859 if (!q_conn) {
860 QEDI_WARN(&qedi->dbg_ctx,
861 "Session no longer exists for cid=0x%x!!\n",
862 iscsi_cid);
863 return;
864 }
865
866 conn = q_conn->cls_conn->dd_data;
867
868 if (unlikely(cqe_err_bits &&
869 GET_FIELD(cqe_err_bits,
870 CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
871 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
872 return;
873 }
874
875 switch (comp_type) {
876 case ISCSI_CQE_TYPE_SOLICITED:
877 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
878 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
879 task = qedi_cmd->task;
880 if (!task) {
881 QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
882 return;
883 }
884
885 /* Process NOPIN local completion */
886 nopout_hdr = (struct iscsi_nopout *)task->hdr;
887 if ((nopout_hdr->itt == RESERVED_ITT) &&
888 (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
889 qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
890 task, q_conn);
891 } else {
892 cqe->cqe_solicited.itid =
893 qedi_get_itt(cqe->cqe_solicited);
894 /* Process other solicited responses */
895 qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
896 }
897 break;
898 case ISCSI_CQE_TYPE_UNSOLICITED:
899 switch (hdr_opcode) {
900 case ISCSI_OPCODE_NOP_IN:
901 qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
902 que_idx);
903 break;
904 case ISCSI_OPCODE_ASYNC_MSG:
905 qedi_process_async_mesg(qedi, cqe, task, q_conn,
906 que_idx);
907 break;
908 case ISCSI_OPCODE_REJECT:
909 qedi_process_reject_mesg(qedi, cqe, task, q_conn,
910 que_idx);
911 break;
912 }
913 goto exit_fp_process;
914 case ISCSI_CQE_TYPE_DUMMY:
915 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
916 goto exit_fp_process;
917 case ISCSI_CQE_TYPE_TASK_CLEANUP:
918 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
919 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, conn);
920 goto exit_fp_process;
921 default:
922 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
923 break;
924 }
925
926 exit_fp_process:
927 return;
928 }
929
qedi_ring_doorbell(struct qedi_conn * qedi_conn)930 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
931 {
932 qedi_conn->ep->db_data.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
933
934 /* wmb - Make sure fw idx is coherent */
935 wmb();
936 writel(*(u32 *)&qedi_conn->ep->db_data, qedi_conn->ep->p_doorbell);
937
938 /* Make sure fw write idx is coherent, and include both memory barriers
939 * as a failsafe as for some architectures the call is the same but on
940 * others they are two different assembly operations.
941 */
942 wmb();
943 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
944 "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
945 qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
946 qedi_conn->iscsi_conn_id);
947 }
948
qedi_get_wqe_idx(struct qedi_conn * qedi_conn)949 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
950 {
951 struct qedi_endpoint *ep;
952 u16 rval;
953
954 ep = qedi_conn->ep;
955 rval = ep->sq_prod_idx;
956
957 /* Increament SQ index */
958 ep->sq_prod_idx++;
959 ep->fw_sq_prod_idx++;
960 if (ep->sq_prod_idx == QEDI_SQ_SIZE)
961 ep->sq_prod_idx = 0;
962
963 return rval;
964 }
965
qedi_send_iscsi_login(struct qedi_conn * qedi_conn,struct iscsi_task * task)966 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
967 struct iscsi_task *task)
968 {
969 struct iscsi_login_req_hdr login_req_pdu_header;
970 struct scsi_sgl_task_params tx_sgl_task_params;
971 struct scsi_sgl_task_params rx_sgl_task_params;
972 struct iscsi_task_params task_params;
973 struct e4_iscsi_task_context *fw_task_ctx;
974 struct qedi_ctx *qedi = qedi_conn->qedi;
975 struct iscsi_login_req *login_hdr;
976 struct scsi_sge *resp_sge = NULL;
977 struct qedi_cmd *qedi_cmd;
978 struct qedi_endpoint *ep;
979 s16 tid = 0;
980 u16 sq_idx = 0;
981 int rval = 0;
982
983 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
984 qedi_cmd = (struct qedi_cmd *)task->dd_data;
985 ep = qedi_conn->ep;
986 login_hdr = (struct iscsi_login_req *)task->hdr;
987
988 tid = qedi_get_task_idx(qedi);
989 if (tid == -1)
990 return -ENOMEM;
991
992 fw_task_ctx =
993 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
994 tid);
995 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
996
997 qedi_cmd->task_id = tid;
998
999 memset(&task_params, 0, sizeof(task_params));
1000 memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
1001 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1002 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1003 /* Update header info */
1004 login_req_pdu_header.opcode = login_hdr->opcode;
1005 login_req_pdu_header.version_min = login_hdr->min_version;
1006 login_req_pdu_header.version_max = login_hdr->max_version;
1007 login_req_pdu_header.flags_attr = login_hdr->flags;
1008 login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1009 login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1010
1011 login_req_pdu_header.tsih = login_hdr->tsih;
1012 login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1013
1014 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1015 login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1016 login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1017 login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1018 login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1019 login_req_pdu_header.exp_stat_sn = 0;
1020
1021 /* Fill tx AHS and rx buffer */
1022 tx_sgl_task_params.sgl =
1023 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1024 tx_sgl_task_params.sgl_phys_addr.lo =
1025 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1026 tx_sgl_task_params.sgl_phys_addr.hi =
1027 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1028 tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1029 tx_sgl_task_params.num_sges = 1;
1030
1031 rx_sgl_task_params.sgl =
1032 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1033 rx_sgl_task_params.sgl_phys_addr.lo =
1034 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1035 rx_sgl_task_params.sgl_phys_addr.hi =
1036 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1037 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1038 rx_sgl_task_params.num_sges = 1;
1039
1040 /* Fill fw input params */
1041 task_params.context = fw_task_ctx;
1042 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1043 task_params.itid = tid;
1044 task_params.cq_rss_number = 0;
1045 task_params.tx_io_size = ntoh24(login_hdr->dlength);
1046 task_params.rx_io_size = resp_sge->sge_len;
1047
1048 sq_idx = qedi_get_wqe_idx(qedi_conn);
1049 task_params.sqe = &ep->sq[sq_idx];
1050
1051 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1052 rval = init_initiator_login_request_task(&task_params,
1053 &login_req_pdu_header,
1054 &tx_sgl_task_params,
1055 &rx_sgl_task_params);
1056 if (rval)
1057 return -1;
1058
1059 spin_lock(&qedi_conn->list_lock);
1060 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1061 qedi_cmd->io_cmd_in_list = true;
1062 qedi_conn->active_cmd_count++;
1063 spin_unlock(&qedi_conn->list_lock);
1064
1065 qedi_ring_doorbell(qedi_conn);
1066 return 0;
1067 }
1068
qedi_send_iscsi_logout(struct qedi_conn * qedi_conn,struct iscsi_task * task)1069 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1070 struct iscsi_task *task)
1071 {
1072 struct iscsi_logout_req_hdr logout_pdu_header;
1073 struct scsi_sgl_task_params tx_sgl_task_params;
1074 struct scsi_sgl_task_params rx_sgl_task_params;
1075 struct iscsi_task_params task_params;
1076 struct e4_iscsi_task_context *fw_task_ctx;
1077 struct iscsi_logout *logout_hdr = NULL;
1078 struct qedi_ctx *qedi = qedi_conn->qedi;
1079 struct qedi_cmd *qedi_cmd;
1080 struct qedi_endpoint *ep;
1081 s16 tid = 0;
1082 u16 sq_idx = 0;
1083 int rval = 0;
1084
1085 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1086 logout_hdr = (struct iscsi_logout *)task->hdr;
1087 ep = qedi_conn->ep;
1088
1089 tid = qedi_get_task_idx(qedi);
1090 if (tid == -1)
1091 return -ENOMEM;
1092
1093 fw_task_ctx =
1094 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1095 tid);
1096 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1097
1098 qedi_cmd->task_id = tid;
1099
1100 memset(&task_params, 0, sizeof(task_params));
1101 memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1102 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1103 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1104
1105 /* Update header info */
1106 logout_pdu_header.opcode = logout_hdr->opcode;
1107 logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1108 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1109 logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1110 logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1111 logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1112 logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1113
1114 /* Fill fw input params */
1115 task_params.context = fw_task_ctx;
1116 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1117 task_params.itid = tid;
1118 task_params.cq_rss_number = 0;
1119 task_params.tx_io_size = 0;
1120 task_params.rx_io_size = 0;
1121
1122 sq_idx = qedi_get_wqe_idx(qedi_conn);
1123 task_params.sqe = &ep->sq[sq_idx];
1124 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1125
1126 rval = init_initiator_logout_request_task(&task_params,
1127 &logout_pdu_header,
1128 NULL, NULL);
1129 if (rval)
1130 return -1;
1131
1132 spin_lock(&qedi_conn->list_lock);
1133 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1134 qedi_cmd->io_cmd_in_list = true;
1135 qedi_conn->active_cmd_count++;
1136 spin_unlock(&qedi_conn->list_lock);
1137
1138 qedi_ring_doorbell(qedi_conn);
1139 return 0;
1140 }
1141
qedi_cleanup_all_io(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn,struct iscsi_task * task,bool in_recovery)1142 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1143 struct iscsi_task *task, bool in_recovery)
1144 {
1145 int rval;
1146 struct iscsi_task *ctask;
1147 struct qedi_cmd *cmd, *cmd_tmp;
1148 struct iscsi_tm *tmf_hdr;
1149 unsigned int lun = 0;
1150 bool lun_reset = false;
1151 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1152 struct iscsi_session *session = conn->session;
1153
1154 /* From recovery, task is NULL or from tmf resp valid task */
1155 if (task) {
1156 tmf_hdr = (struct iscsi_tm *)task->hdr;
1157
1158 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1159 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1160 lun_reset = true;
1161 lun = scsilun_to_int(&tmf_hdr->lun);
1162 }
1163 }
1164
1165 qedi_conn->cmd_cleanup_req = 0;
1166 qedi_conn->cmd_cleanup_cmpl = 0;
1167
1168 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1169 "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1170 qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1171 in_recovery, lun_reset);
1172
1173 if (lun_reset)
1174 spin_lock_bh(&session->back_lock);
1175
1176 spin_lock(&qedi_conn->list_lock);
1177
1178 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1179 io_cmd) {
1180 ctask = cmd->task;
1181 if (ctask == task)
1182 continue;
1183
1184 if (lun_reset) {
1185 if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1186 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1187 "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1188 cmd->task_id, get_itt(ctask->itt),
1189 cmd->scsi_cmd, cmd->scsi_cmd->device,
1190 ctask->state, cmd->state,
1191 qedi_conn->iscsi_conn_id);
1192 if (cmd->scsi_cmd->device->lun != lun)
1193 continue;
1194 }
1195 }
1196 qedi_conn->cmd_cleanup_req++;
1197 qedi_iscsi_cleanup_task(ctask, true);
1198
1199 cmd->io_cmd_in_list = false;
1200 list_del_init(&cmd->io_cmd);
1201 qedi_conn->active_cmd_count--;
1202 QEDI_WARN(&qedi->dbg_ctx,
1203 "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1204 &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1205 }
1206
1207 spin_unlock(&qedi_conn->list_lock);
1208
1209 if (lun_reset)
1210 spin_unlock_bh(&session->back_lock);
1211
1212 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1213 "cmd_cleanup_req=%d, cid=0x%x\n",
1214 qedi_conn->cmd_cleanup_req,
1215 qedi_conn->iscsi_conn_id);
1216
1217 rval = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1218 ((qedi_conn->cmd_cleanup_req ==
1219 qedi_conn->cmd_cleanup_cmpl) ||
1220 test_bit(QEDI_IN_RECOVERY,
1221 &qedi->flags)),
1222 5 * HZ);
1223 if (rval) {
1224 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1225 "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1226 qedi_conn->cmd_cleanup_req,
1227 qedi_conn->cmd_cleanup_cmpl,
1228 qedi_conn->iscsi_conn_id);
1229
1230 return 0;
1231 }
1232
1233 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1234 "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1235 qedi_conn->cmd_cleanup_req,
1236 qedi_conn->cmd_cleanup_cmpl,
1237 qedi_conn->iscsi_conn_id);
1238
1239 iscsi_host_for_each_session(qedi->shost,
1240 qedi_mark_device_missing);
1241 qedi_ops->common->drain(qedi->cdev);
1242
1243 /* Enable IOs for all other sessions except current.*/
1244 if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1245 (qedi_conn->cmd_cleanup_req ==
1246 qedi_conn->cmd_cleanup_cmpl) ||
1247 test_bit(QEDI_IN_RECOVERY,
1248 &qedi->flags),
1249 5 * HZ)) {
1250 iscsi_host_for_each_session(qedi->shost,
1251 qedi_mark_device_available);
1252 return -1;
1253 }
1254
1255 iscsi_host_for_each_session(qedi->shost,
1256 qedi_mark_device_available);
1257
1258 return 0;
1259 }
1260
qedi_clearsq(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn,struct iscsi_task * task)1261 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1262 struct iscsi_task *task)
1263 {
1264 struct qedi_endpoint *qedi_ep;
1265 int rval;
1266
1267 qedi_ep = qedi_conn->ep;
1268 qedi_conn->cmd_cleanup_req = 0;
1269 qedi_conn->cmd_cleanup_cmpl = 0;
1270
1271 if (!qedi_ep) {
1272 QEDI_WARN(&qedi->dbg_ctx,
1273 "Cannot proceed, ep already disconnected, cid=0x%x\n",
1274 qedi_conn->iscsi_conn_id);
1275 return;
1276 }
1277
1278 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1279 "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1280 qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1281
1282 qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1283
1284 rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1285 if (rval) {
1286 QEDI_ERR(&qedi->dbg_ctx,
1287 "fatal error, need hard reset, cid=0x%x\n",
1288 qedi_conn->iscsi_conn_id);
1289 WARN_ON(1);
1290 }
1291 }
1292
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)1293 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1294 struct qedi_conn *qedi_conn,
1295 struct iscsi_task *task,
1296 struct qedi_cmd *qedi_cmd,
1297 struct qedi_work_map *list_work)
1298 {
1299 struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1300 int wait;
1301
1302 wait = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1303 ((qedi_cmd->state ==
1304 CLEANUP_RECV) ||
1305 ((qedi_cmd->type == TYPEIO) &&
1306 (cmd->state ==
1307 RESPONSE_RECEIVED))),
1308 5 * HZ);
1309 if (!wait) {
1310 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1311
1312 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1313 "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1314 cmd->task_id, qedi_conn->iscsi_conn_id);
1315
1316 return -1;
1317 }
1318 return 0;
1319 }
1320
qedi_abort_work(struct work_struct * work)1321 static void qedi_abort_work(struct work_struct *work)
1322 {
1323 struct qedi_cmd *qedi_cmd =
1324 container_of(work, struct qedi_cmd, tmf_work);
1325 struct qedi_conn *qedi_conn = qedi_cmd->conn;
1326 struct qedi_ctx *qedi = qedi_conn->qedi;
1327 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1328 struct qedi_work_map *list_work = NULL;
1329 struct iscsi_task *mtask;
1330 struct qedi_cmd *cmd;
1331 struct iscsi_task *ctask;
1332 struct iscsi_tm *tmf_hdr;
1333 s16 rval = 0;
1334
1335 mtask = qedi_cmd->task;
1336 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1337
1338 spin_lock_bh(&conn->session->back_lock);
1339 ctask = iscsi_itt_to_ctask(conn, tmf_hdr->rtt);
1340 if (!ctask) {
1341 spin_unlock_bh(&conn->session->back_lock);
1342 QEDI_ERR(&qedi->dbg_ctx, "Invalid RTT. Letting abort timeout.\n");
1343 goto clear_cleanup;
1344 }
1345
1346 if (iscsi_task_is_completed(ctask)) {
1347 spin_unlock_bh(&conn->session->back_lock);
1348 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1349 "Task already completed\n");
1350 /*
1351 * We have to still send the TMF because libiscsi needs the
1352 * response to avoid a timeout.
1353 */
1354 goto send_tmf;
1355 }
1356 spin_unlock_bh(&conn->session->back_lock);
1357
1358 cmd = (struct qedi_cmd *)ctask->dd_data;
1359 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1360 "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1361 get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1362 qedi_conn->iscsi_conn_id);
1363
1364 if (qedi_do_not_recover) {
1365 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1366 qedi_do_not_recover);
1367 goto clear_cleanup;
1368 }
1369
1370 list_work = kzalloc(sizeof(*list_work), GFP_NOIO);
1371 if (!list_work) {
1372 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1373 goto clear_cleanup;
1374 }
1375
1376 qedi_cmd->type = TYPEIO;
1377 qedi_cmd->state = CLEANUP_WAIT;
1378 list_work->qedi_cmd = qedi_cmd;
1379 list_work->rtid = cmd->task_id;
1380 list_work->state = QEDI_WORK_SCHEDULED;
1381 list_work->ctask = ctask;
1382 qedi_cmd->list_tmf_work = list_work;
1383
1384 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1385 "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1386 list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1387 tmf_hdr->flags);
1388
1389 spin_lock_bh(&qedi_conn->tmf_work_lock);
1390 list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1391 spin_unlock_bh(&qedi_conn->tmf_work_lock);
1392
1393 qedi_iscsi_cleanup_task(ctask, false);
1394
1395 rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1396 list_work);
1397 if (rval == -1) {
1398 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1399 "FW cleanup got escalated, cid=0x%x\n",
1400 qedi_conn->iscsi_conn_id);
1401 goto ldel_exit;
1402 }
1403
1404 send_tmf:
1405 send_iscsi_tmf(qedi_conn, qedi_cmd->task, ctask);
1406 goto clear_cleanup;
1407
1408 ldel_exit:
1409 spin_lock_bh(&qedi_conn->tmf_work_lock);
1410 if (qedi_cmd->list_tmf_work) {
1411 list_del_init(&list_work->list);
1412 qedi_cmd->list_tmf_work = NULL;
1413 kfree(list_work);
1414 }
1415 spin_unlock_bh(&qedi_conn->tmf_work_lock);
1416
1417 spin_lock(&qedi_conn->list_lock);
1418 if (likely(cmd->io_cmd_in_list)) {
1419 cmd->io_cmd_in_list = false;
1420 list_del_init(&cmd->io_cmd);
1421 qedi_conn->active_cmd_count--;
1422 }
1423 spin_unlock(&qedi_conn->list_lock);
1424
1425 clear_cleanup:
1426 spin_lock(&qedi_conn->tmf_work_lock);
1427 qedi_conn->fw_cleanup_works--;
1428 spin_unlock(&qedi_conn->tmf_work_lock);
1429 }
1430
send_iscsi_tmf(struct qedi_conn * qedi_conn,struct iscsi_task * mtask,struct iscsi_task * ctask)1431 static int send_iscsi_tmf(struct qedi_conn *qedi_conn, struct iscsi_task *mtask,
1432 struct iscsi_task *ctask)
1433 {
1434 struct iscsi_tmf_request_hdr tmf_pdu_header;
1435 struct iscsi_task_params task_params;
1436 struct qedi_ctx *qedi = qedi_conn->qedi;
1437 struct e4_iscsi_task_context *fw_task_ctx;
1438 struct iscsi_tm *tmf_hdr;
1439 struct qedi_cmd *qedi_cmd;
1440 struct qedi_cmd *cmd;
1441 struct qedi_endpoint *ep;
1442 u32 scsi_lun[2];
1443 s16 tid = 0;
1444 u16 sq_idx = 0;
1445
1446 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1447 qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1448 ep = qedi_conn->ep;
1449 if (!ep)
1450 return -ENODEV;
1451
1452 tid = qedi_get_task_idx(qedi);
1453 if (tid == -1)
1454 return -ENOMEM;
1455
1456 fw_task_ctx =
1457 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1458 tid);
1459 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1460
1461 qedi_cmd->task_id = tid;
1462
1463 memset(&task_params, 0, sizeof(task_params));
1464 memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1465
1466 /* Update header info */
1467 qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1468 tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1469 tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1470
1471 memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1472 tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1473 tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1474
1475 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1476 ISCSI_TM_FUNC_ABORT_TASK) {
1477 cmd = (struct qedi_cmd *)ctask->dd_data;
1478 tmf_pdu_header.rtt =
1479 qedi_set_itt(cmd->task_id,
1480 get_itt(tmf_hdr->rtt));
1481 } else {
1482 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1483 }
1484
1485 tmf_pdu_header.opcode = tmf_hdr->opcode;
1486 tmf_pdu_header.function = tmf_hdr->flags;
1487 tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1488 tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1489
1490 /* Fill fw input params */
1491 task_params.context = fw_task_ctx;
1492 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1493 task_params.itid = tid;
1494 task_params.cq_rss_number = 0;
1495 task_params.tx_io_size = 0;
1496 task_params.rx_io_size = 0;
1497
1498 sq_idx = qedi_get_wqe_idx(qedi_conn);
1499 task_params.sqe = &ep->sq[sq_idx];
1500
1501 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1502 init_initiator_tmf_request_task(&task_params, &tmf_pdu_header);
1503
1504 spin_lock(&qedi_conn->list_lock);
1505 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1506 qedi_cmd->io_cmd_in_list = true;
1507 qedi_conn->active_cmd_count++;
1508 spin_unlock(&qedi_conn->list_lock);
1509
1510 qedi_ring_doorbell(qedi_conn);
1511 return 0;
1512 }
1513
qedi_send_iscsi_tmf(struct qedi_conn * qedi_conn,struct iscsi_task * mtask)1514 int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn, struct iscsi_task *mtask)
1515 {
1516 struct iscsi_tm *tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1517 struct qedi_cmd *qedi_cmd = mtask->dd_data;
1518 struct qedi_ctx *qedi = qedi_conn->qedi;
1519 int rc = 0;
1520
1521 switch (tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) {
1522 case ISCSI_TM_FUNC_ABORT_TASK:
1523 spin_lock(&qedi_conn->tmf_work_lock);
1524 qedi_conn->fw_cleanup_works++;
1525 spin_unlock(&qedi_conn->tmf_work_lock);
1526
1527 INIT_WORK(&qedi_cmd->tmf_work, qedi_abort_work);
1528 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1529 break;
1530 case ISCSI_TM_FUNC_LOGICAL_UNIT_RESET:
1531 case ISCSI_TM_FUNC_TARGET_WARM_RESET:
1532 case ISCSI_TM_FUNC_TARGET_COLD_RESET:
1533 rc = send_iscsi_tmf(qedi_conn, mtask, NULL);
1534 break;
1535 default:
1536 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1537 qedi_conn->iscsi_conn_id);
1538 return -EINVAL;
1539 }
1540
1541 return rc;
1542 }
1543
qedi_send_iscsi_text(struct qedi_conn * qedi_conn,struct iscsi_task * task)1544 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1545 struct iscsi_task *task)
1546 {
1547 struct iscsi_text_request_hdr text_request_pdu_header;
1548 struct scsi_sgl_task_params tx_sgl_task_params;
1549 struct scsi_sgl_task_params rx_sgl_task_params;
1550 struct iscsi_task_params task_params;
1551 struct e4_iscsi_task_context *fw_task_ctx;
1552 struct qedi_ctx *qedi = qedi_conn->qedi;
1553 struct iscsi_text *text_hdr;
1554 struct scsi_sge *req_sge = NULL;
1555 struct scsi_sge *resp_sge = NULL;
1556 struct qedi_cmd *qedi_cmd;
1557 struct qedi_endpoint *ep;
1558 s16 tid = 0;
1559 u16 sq_idx = 0;
1560 int rval = 0;
1561
1562 req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1563 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1564 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1565 text_hdr = (struct iscsi_text *)task->hdr;
1566 ep = qedi_conn->ep;
1567
1568 tid = qedi_get_task_idx(qedi);
1569 if (tid == -1)
1570 return -ENOMEM;
1571
1572 fw_task_ctx =
1573 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1574 tid);
1575 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1576
1577 qedi_cmd->task_id = tid;
1578
1579 memset(&task_params, 0, sizeof(task_params));
1580 memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1581 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1582 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1583
1584 /* Update header info */
1585 text_request_pdu_header.opcode = text_hdr->opcode;
1586 text_request_pdu_header.flags_attr = text_hdr->flags;
1587
1588 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1589 text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1590 text_request_pdu_header.ttt = text_hdr->ttt;
1591 text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1592 text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1593 text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1594
1595 /* Fill tx AHS and rx buffer */
1596 tx_sgl_task_params.sgl =
1597 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1598 tx_sgl_task_params.sgl_phys_addr.lo =
1599 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1600 tx_sgl_task_params.sgl_phys_addr.hi =
1601 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1602 tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1603 tx_sgl_task_params.num_sges = 1;
1604
1605 rx_sgl_task_params.sgl =
1606 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1607 rx_sgl_task_params.sgl_phys_addr.lo =
1608 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1609 rx_sgl_task_params.sgl_phys_addr.hi =
1610 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1611 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1612 rx_sgl_task_params.num_sges = 1;
1613
1614 /* Fill fw input params */
1615 task_params.context = fw_task_ctx;
1616 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1617 task_params.itid = tid;
1618 task_params.cq_rss_number = 0;
1619 task_params.tx_io_size = ntoh24(text_hdr->dlength);
1620 task_params.rx_io_size = resp_sge->sge_len;
1621
1622 sq_idx = qedi_get_wqe_idx(qedi_conn);
1623 task_params.sqe = &ep->sq[sq_idx];
1624
1625 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1626 rval = init_initiator_text_request_task(&task_params,
1627 &text_request_pdu_header,
1628 &tx_sgl_task_params,
1629 &rx_sgl_task_params);
1630 if (rval)
1631 return -1;
1632
1633 spin_lock(&qedi_conn->list_lock);
1634 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1635 qedi_cmd->io_cmd_in_list = true;
1636 qedi_conn->active_cmd_count++;
1637 spin_unlock(&qedi_conn->list_lock);
1638
1639 qedi_ring_doorbell(qedi_conn);
1640 return 0;
1641 }
1642
qedi_send_iscsi_nopout(struct qedi_conn * qedi_conn,struct iscsi_task * task,char * datap,int data_len,int unsol)1643 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1644 struct iscsi_task *task,
1645 char *datap, int data_len, int unsol)
1646 {
1647 struct iscsi_nop_out_hdr nop_out_pdu_header;
1648 struct scsi_sgl_task_params tx_sgl_task_params;
1649 struct scsi_sgl_task_params rx_sgl_task_params;
1650 struct iscsi_task_params task_params;
1651 struct qedi_ctx *qedi = qedi_conn->qedi;
1652 struct e4_iscsi_task_context *fw_task_ctx;
1653 struct iscsi_nopout *nopout_hdr;
1654 struct scsi_sge *resp_sge = NULL;
1655 struct qedi_cmd *qedi_cmd;
1656 struct qedi_endpoint *ep;
1657 u32 scsi_lun[2];
1658 s16 tid = 0;
1659 u16 sq_idx = 0;
1660 int rval = 0;
1661
1662 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1663 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1664 nopout_hdr = (struct iscsi_nopout *)task->hdr;
1665 ep = qedi_conn->ep;
1666
1667 tid = qedi_get_task_idx(qedi);
1668 if (tid == -1)
1669 return -ENOMEM;
1670
1671 fw_task_ctx =
1672 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1673 tid);
1674 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1675
1676 qedi_cmd->task_id = tid;
1677
1678 memset(&task_params, 0, sizeof(task_params));
1679 memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1680 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1681 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1682
1683 /* Update header info */
1684 nop_out_pdu_header.opcode = nopout_hdr->opcode;
1685 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1686 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1687
1688 memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1689 nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1690 nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1691 nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1692 nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1693
1694 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1695
1696 if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1697 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1698 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1699 } else {
1700 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1701 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1702
1703 spin_lock(&qedi_conn->list_lock);
1704 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1705 qedi_cmd->io_cmd_in_list = true;
1706 qedi_conn->active_cmd_count++;
1707 spin_unlock(&qedi_conn->list_lock);
1708 }
1709
1710 /* Fill tx AHS and rx buffer */
1711 if (data_len) {
1712 tx_sgl_task_params.sgl =
1713 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1714 tx_sgl_task_params.sgl_phys_addr.lo =
1715 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1716 tx_sgl_task_params.sgl_phys_addr.hi =
1717 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1718 tx_sgl_task_params.total_buffer_size = data_len;
1719 tx_sgl_task_params.num_sges = 1;
1720
1721 rx_sgl_task_params.sgl =
1722 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1723 rx_sgl_task_params.sgl_phys_addr.lo =
1724 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1725 rx_sgl_task_params.sgl_phys_addr.hi =
1726 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1727 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1728 rx_sgl_task_params.num_sges = 1;
1729 }
1730
1731 /* Fill fw input params */
1732 task_params.context = fw_task_ctx;
1733 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1734 task_params.itid = tid;
1735 task_params.cq_rss_number = 0;
1736 task_params.tx_io_size = data_len;
1737 task_params.rx_io_size = resp_sge->sge_len;
1738
1739 sq_idx = qedi_get_wqe_idx(qedi_conn);
1740 task_params.sqe = &ep->sq[sq_idx];
1741
1742 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1743 rval = init_initiator_nop_out_task(&task_params,
1744 &nop_out_pdu_header,
1745 &tx_sgl_task_params,
1746 &rx_sgl_task_params);
1747 if (rval)
1748 return -1;
1749
1750 qedi_ring_doorbell(qedi_conn);
1751 return 0;
1752 }
1753
qedi_split_bd(struct qedi_cmd * cmd,u64 addr,int sg_len,int bd_index)1754 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1755 int bd_index)
1756 {
1757 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1758 int frag_size, sg_frags;
1759
1760 sg_frags = 0;
1761
1762 while (sg_len) {
1763 if (addr % QEDI_PAGE_SIZE)
1764 frag_size =
1765 (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1766 else
1767 frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1768 (sg_len % QEDI_BD_SPLIT_SZ);
1769
1770 if (frag_size == 0)
1771 frag_size = QEDI_BD_SPLIT_SZ;
1772
1773 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1774 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1775 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1776 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1777 "split sge %d: addr=%llx, len=%x",
1778 (bd_index + sg_frags), addr, frag_size);
1779
1780 addr += (u64)frag_size;
1781 sg_frags++;
1782 sg_len -= frag_size;
1783 }
1784 return sg_frags;
1785 }
1786
qedi_map_scsi_sg(struct qedi_ctx * qedi,struct qedi_cmd * cmd)1787 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1788 {
1789 struct scsi_cmnd *sc = cmd->scsi_cmd;
1790 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1791 struct scatterlist *sg;
1792 int byte_count = 0;
1793 int bd_count = 0;
1794 int sg_count;
1795 int sg_len;
1796 int sg_frags;
1797 u64 addr, end_addr;
1798 int i;
1799
1800 WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1801
1802 sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1803 scsi_sg_count(sc), sc->sc_data_direction);
1804
1805 /*
1806 * New condition to send single SGE as cached-SGL.
1807 * Single SGE with length less than 64K.
1808 */
1809 sg = scsi_sglist(sc);
1810 if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1811 sg_len = sg_dma_len(sg);
1812 addr = (u64)sg_dma_address(sg);
1813
1814 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1815 bd[bd_count].sge_addr.hi = (addr >> 32);
1816 bd[bd_count].sge_len = (u16)sg_len;
1817
1818 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1819 "single-cached-sgl: bd_count:%d addr=%llx, len=%x",
1820 sg_count, addr, sg_len);
1821
1822 return ++bd_count;
1823 }
1824
1825 scsi_for_each_sg(sc, sg, sg_count, i) {
1826 sg_len = sg_dma_len(sg);
1827 addr = (u64)sg_dma_address(sg);
1828 end_addr = (addr + sg_len);
1829
1830 /*
1831 * first sg elem in the 'list',
1832 * check if end addr is page-aligned.
1833 */
1834 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1835 cmd->use_slowpath = true;
1836
1837 /*
1838 * last sg elem in the 'list',
1839 * check if start addr is page-aligned.
1840 */
1841 else if ((i == (sg_count - 1)) &&
1842 (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1843 cmd->use_slowpath = true;
1844
1845 /*
1846 * middle sg elements in list,
1847 * check if start and end addr is page-aligned
1848 */
1849 else if ((i != 0) && (i != (sg_count - 1)) &&
1850 ((addr % QEDI_PAGE_SIZE) ||
1851 (end_addr % QEDI_PAGE_SIZE)))
1852 cmd->use_slowpath = true;
1853
1854 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1855 i, sg_len);
1856
1857 if (sg_len > QEDI_BD_SPLIT_SZ) {
1858 sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1859 } else {
1860 sg_frags = 1;
1861 bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1862 bd[bd_count].sge_addr.hi = addr >> 32;
1863 bd[bd_count].sge_len = sg_len;
1864 }
1865 byte_count += sg_len;
1866 bd_count += sg_frags;
1867 }
1868
1869 if (byte_count != scsi_bufflen(sc))
1870 QEDI_ERR(&qedi->dbg_ctx,
1871 "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1872 scsi_bufflen(sc));
1873 else
1874 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1875 byte_count);
1876
1877 WARN_ON(byte_count != scsi_bufflen(sc));
1878
1879 return bd_count;
1880 }
1881
qedi_iscsi_map_sg_list(struct qedi_cmd * cmd)1882 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1883 {
1884 int bd_count;
1885 struct scsi_cmnd *sc = cmd->scsi_cmd;
1886
1887 if (scsi_sg_count(sc)) {
1888 bd_count = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1889 if (bd_count == 0)
1890 return;
1891 } else {
1892 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1893
1894 bd[0].sge_addr.lo = 0;
1895 bd[0].sge_addr.hi = 0;
1896 bd[0].sge_len = 0;
1897 bd_count = 0;
1898 }
1899 cmd->io_tbl.sge_valid = bd_count;
1900 }
1901
qedi_cpy_scsi_cdb(struct scsi_cmnd * sc,u32 * dstp)1902 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1903 {
1904 u32 dword;
1905 int lpcnt;
1906 u8 *srcp;
1907
1908 lpcnt = sc->cmd_len / sizeof(dword);
1909 srcp = (u8 *)sc->cmnd;
1910 while (lpcnt--) {
1911 memcpy(&dword, (const void *)srcp, 4);
1912 *dstp = cpu_to_be32(dword);
1913 srcp += 4;
1914 dstp++;
1915 }
1916 if (sc->cmd_len & 0x3) {
1917 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1918 *dstp = cpu_to_be32(dword);
1919 }
1920 }
1921
qedi_trace_io(struct qedi_ctx * qedi,struct iscsi_task * task,u16 tid,int8_t direction)1922 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
1923 u16 tid, int8_t direction)
1924 {
1925 struct qedi_io_log *io_log;
1926 struct iscsi_conn *conn = task->conn;
1927 struct qedi_conn *qedi_conn = conn->dd_data;
1928 struct scsi_cmnd *sc_cmd = task->sc;
1929 unsigned long flags;
1930
1931 spin_lock_irqsave(&qedi->io_trace_lock, flags);
1932
1933 io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
1934 io_log->direction = direction;
1935 io_log->task_id = tid;
1936 io_log->cid = qedi_conn->iscsi_conn_id;
1937 io_log->lun = sc_cmd->device->lun;
1938 io_log->op = sc_cmd->cmnd[0];
1939 io_log->lba[0] = sc_cmd->cmnd[2];
1940 io_log->lba[1] = sc_cmd->cmnd[3];
1941 io_log->lba[2] = sc_cmd->cmnd[4];
1942 io_log->lba[3] = sc_cmd->cmnd[5];
1943 io_log->bufflen = scsi_bufflen(sc_cmd);
1944 io_log->sg_count = scsi_sg_count(sc_cmd);
1945 io_log->fast_sgs = qedi->fast_sgls;
1946 io_log->cached_sgs = qedi->cached_sgls;
1947 io_log->slow_sgs = qedi->slow_sgls;
1948 io_log->cached_sge = qedi->use_cached_sge;
1949 io_log->slow_sge = qedi->use_slow_sge;
1950 io_log->fast_sge = qedi->use_fast_sge;
1951 io_log->result = sc_cmd->result;
1952 io_log->jiffies = jiffies;
1953 io_log->blk_req_cpu = smp_processor_id();
1954
1955 if (direction == QEDI_IO_TRACE_REQ) {
1956 /* For requests we only care about the submission CPU */
1957 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
1958 io_log->intr_cpu = 0;
1959 io_log->blk_rsp_cpu = 0;
1960 } else if (direction == QEDI_IO_TRACE_RSP) {
1961 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
1962 io_log->intr_cpu = qedi->intr_cpu;
1963 io_log->blk_rsp_cpu = smp_processor_id();
1964 }
1965
1966 qedi->io_trace_idx++;
1967 if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
1968 qedi->io_trace_idx = 0;
1969
1970 qedi->use_cached_sge = false;
1971 qedi->use_slow_sge = false;
1972 qedi->use_fast_sge = false;
1973
1974 spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
1975 }
1976
qedi_iscsi_send_ioreq(struct iscsi_task * task)1977 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
1978 {
1979 struct iscsi_conn *conn = task->conn;
1980 struct iscsi_session *session = conn->session;
1981 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1982 struct qedi_ctx *qedi = iscsi_host_priv(shost);
1983 struct qedi_conn *qedi_conn = conn->dd_data;
1984 struct qedi_cmd *cmd = task->dd_data;
1985 struct scsi_cmnd *sc = task->sc;
1986 struct iscsi_cmd_hdr cmd_pdu_header;
1987 struct scsi_sgl_task_params tx_sgl_task_params;
1988 struct scsi_sgl_task_params rx_sgl_task_params;
1989 struct scsi_sgl_task_params *prx_sgl = NULL;
1990 struct scsi_sgl_task_params *ptx_sgl = NULL;
1991 struct iscsi_task_params task_params;
1992 struct iscsi_conn_params conn_params;
1993 struct scsi_initiator_cmd_params cmd_params;
1994 struct e4_iscsi_task_context *fw_task_ctx;
1995 struct iscsi_cls_conn *cls_conn;
1996 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
1997 enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
1998 struct qedi_endpoint *ep;
1999 u32 scsi_lun[2];
2000 s16 tid = 0;
2001 u16 sq_idx = 0;
2002 u16 cq_idx;
2003 int rval = 0;
2004
2005 ep = qedi_conn->ep;
2006 cls_conn = qedi_conn->cls_conn;
2007 conn = cls_conn->dd_data;
2008
2009 qedi_iscsi_map_sg_list(cmd);
2010 int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2011
2012 tid = qedi_get_task_idx(qedi);
2013 if (tid == -1)
2014 return -ENOMEM;
2015
2016 fw_task_ctx =
2017 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2018 tid);
2019 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
2020
2021 cmd->task_id = tid;
2022
2023 memset(&task_params, 0, sizeof(task_params));
2024 memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2025 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2026 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2027 memset(&conn_params, 0, sizeof(conn_params));
2028 memset(&cmd_params, 0, sizeof(cmd_params));
2029
2030 cq_idx = smp_processor_id() % qedi->num_queues;
2031 /* Update header info */
2032 SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2033 ISCSI_ATTR_SIMPLE);
2034 if (hdr->cdb[0] != TEST_UNIT_READY) {
2035 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2036 SET_FIELD(cmd_pdu_header.flags_attr,
2037 ISCSI_CMD_HDR_WRITE, 1);
2038 task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2039 } else {
2040 SET_FIELD(cmd_pdu_header.flags_attr,
2041 ISCSI_CMD_HDR_READ, 1);
2042 task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2043 }
2044 }
2045
2046 cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2047 cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2048
2049 qedi_update_itt_map(qedi, tid, task->itt, cmd);
2050 cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2051 cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2052 cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2053 cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2054 cmd_pdu_header.hdr_first_byte = hdr->opcode;
2055 qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2056
2057 /* Fill tx AHS and rx buffer */
2058 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2059 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2060 tx_sgl_task_params.sgl_phys_addr.lo =
2061 (u32)(cmd->io_tbl.sge_tbl_dma);
2062 tx_sgl_task_params.sgl_phys_addr.hi =
2063 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2064 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2065 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2066 if (cmd->use_slowpath)
2067 tx_sgl_task_params.small_mid_sge = true;
2068 } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2069 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2070 rx_sgl_task_params.sgl_phys_addr.lo =
2071 (u32)(cmd->io_tbl.sge_tbl_dma);
2072 rx_sgl_task_params.sgl_phys_addr.hi =
2073 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2074 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2075 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2076 }
2077
2078 /* Add conn param */
2079 conn_params.first_burst_length = conn->session->first_burst;
2080 conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2081 conn_params.max_burst_length = conn->session->max_burst;
2082 if (conn->session->initial_r2t_en)
2083 conn_params.initial_r2t = true;
2084 if (conn->session->imm_data_en)
2085 conn_params.immediate_data = true;
2086
2087 /* Add cmd params */
2088 cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2089 cmd_params.sense_data_buffer_phys_addr.hi =
2090 (u32)((u64)cmd->sense_buffer_dma >> 32);
2091 /* Fill fw input params */
2092 task_params.context = fw_task_ctx;
2093 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2094 task_params.itid = tid;
2095 task_params.cq_rss_number = cq_idx;
2096 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2097 task_params.tx_io_size = scsi_bufflen(sc);
2098 else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2099 task_params.rx_io_size = scsi_bufflen(sc);
2100
2101 sq_idx = qedi_get_wqe_idx(qedi_conn);
2102 task_params.sqe = &ep->sq[sq_idx];
2103
2104 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2105 "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2106 (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2107 "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2108 "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2109 (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2110 (u32)(cmd->io_tbl.sge_tbl_dma),
2111 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2112
2113 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2114
2115 if (task_params.tx_io_size != 0)
2116 ptx_sgl = &tx_sgl_task_params;
2117 if (task_params.rx_io_size != 0)
2118 prx_sgl = &rx_sgl_task_params;
2119
2120 rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2121 &cmd_params, &cmd_pdu_header,
2122 ptx_sgl, prx_sgl,
2123 NULL);
2124 if (rval)
2125 return -1;
2126
2127 spin_lock(&qedi_conn->list_lock);
2128 list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2129 cmd->io_cmd_in_list = true;
2130 qedi_conn->active_cmd_count++;
2131 spin_unlock(&qedi_conn->list_lock);
2132
2133 qedi_ring_doorbell(qedi_conn);
2134 return 0;
2135 }
2136
qedi_iscsi_cleanup_task(struct iscsi_task * task,bool mark_cmd_node_deleted)2137 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2138 {
2139 struct iscsi_task_params task_params;
2140 struct qedi_endpoint *ep;
2141 struct iscsi_conn *conn = task->conn;
2142 struct qedi_conn *qedi_conn = conn->dd_data;
2143 struct qedi_cmd *cmd = task->dd_data;
2144 u16 sq_idx = 0;
2145 int rval = 0;
2146
2147 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2148 "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2149 cmd->task_id, get_itt(task->itt), task->state,
2150 cmd->state, qedi_conn->iscsi_conn_id);
2151
2152 memset(&task_params, 0, sizeof(task_params));
2153 ep = qedi_conn->ep;
2154
2155 sq_idx = qedi_get_wqe_idx(qedi_conn);
2156
2157 task_params.sqe = &ep->sq[sq_idx];
2158 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2159 task_params.itid = cmd->task_id;
2160
2161 rval = init_cleanup_task(&task_params);
2162 if (rval)
2163 return rval;
2164
2165 qedi_ring_doorbell(qedi_conn);
2166 return 0;
2167 }
2168
