1 /*
2 * QLogic iSCSI Offload Driver
3 * Copyright (c) 2016 Cavium Inc.
4 *
5 * This software is available under the terms of the GNU General Public License
6 * (GPL) Version 2, available from the file COPYING in the main directory of
7 * this source tree.
8 */
9
10 #include <linux/blkdev.h>
11 #include <scsi/scsi_tcq.h>
12 #include <linux/delay.h>
13
14 #include "qedi.h"
15 #include "qedi_iscsi.h"
16 #include "qedi_gbl.h"
17 #include "qedi_fw_iscsi.h"
18 #include "qedi_fw_scsi.h"
19
20 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
21 struct iscsi_task *mtask);
22
qedi_iscsi_unmap_sg_list(struct qedi_cmd * cmd)23 void qedi_iscsi_unmap_sg_list(struct qedi_cmd *cmd)
24 {
25 struct scsi_cmnd *sc = cmd->scsi_cmd;
26
27 if (cmd->io_tbl.sge_valid && sc) {
28 cmd->io_tbl.sge_valid = 0;
29 scsi_dma_unmap(sc);
30 }
31 }
32
qedi_process_logout_resp(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn)33 static void qedi_process_logout_resp(struct qedi_ctx *qedi,
34 union iscsi_cqe *cqe,
35 struct iscsi_task *task,
36 struct qedi_conn *qedi_conn)
37 {
38 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
39 struct iscsi_logout_rsp *resp_hdr;
40 struct iscsi_session *session = conn->session;
41 struct iscsi_logout_response_hdr *cqe_logout_response;
42 struct qedi_cmd *cmd;
43
44 cmd = (struct qedi_cmd *)task->dd_data;
45 cqe_logout_response = &cqe->cqe_common.iscsi_hdr.logout_response;
46 spin_lock(&session->back_lock);
47 resp_hdr = (struct iscsi_logout_rsp *)&qedi_conn->gen_pdu.resp_hdr;
48 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
49 resp_hdr->opcode = cqe_logout_response->opcode;
50 resp_hdr->flags = cqe_logout_response->flags;
51 resp_hdr->hlength = 0;
52
53 resp_hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
54 resp_hdr->statsn = cpu_to_be32(cqe_logout_response->stat_sn);
55 resp_hdr->exp_cmdsn = cpu_to_be32(cqe_logout_response->exp_cmd_sn);
56 resp_hdr->max_cmdsn = cpu_to_be32(cqe_logout_response->max_cmd_sn);
57
58 resp_hdr->t2wait = cpu_to_be32(cqe_logout_response->time_2_wait);
59 resp_hdr->t2retain = cpu_to_be32(cqe_logout_response->time_2_retain);
60
61 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
62 "Freeing tid=0x%x for cid=0x%x\n",
63 cmd->task_id, qedi_conn->iscsi_conn_id);
64
65 spin_lock(&qedi_conn->list_lock);
66 if (likely(cmd->io_cmd_in_list)) {
67 cmd->io_cmd_in_list = false;
68 list_del_init(&cmd->io_cmd);
69 qedi_conn->active_cmd_count--;
70 } else {
71 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
72 "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
73 cmd->task_id, qedi_conn->iscsi_conn_id,
74 &cmd->io_cmd);
75 }
76 spin_unlock(&qedi_conn->list_lock);
77
78 cmd->state = RESPONSE_RECEIVED;
79 qedi_clear_task_idx(qedi, cmd->task_id);
80 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, NULL, 0);
81
82 spin_unlock(&session->back_lock);
83 }
84
qedi_process_text_resp(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn)85 static void qedi_process_text_resp(struct qedi_ctx *qedi,
86 union iscsi_cqe *cqe,
87 struct iscsi_task *task,
88 struct qedi_conn *qedi_conn)
89 {
90 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
91 struct iscsi_session *session = conn->session;
92 struct e4_iscsi_task_context *task_ctx;
93 struct iscsi_text_rsp *resp_hdr_ptr;
94 struct iscsi_text_response_hdr *cqe_text_response;
95 struct qedi_cmd *cmd;
96 int pld_len;
97
98 cmd = (struct qedi_cmd *)task->dd_data;
99 task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
100
101 cqe_text_response = &cqe->cqe_common.iscsi_hdr.text_response;
102 spin_lock(&session->back_lock);
103 resp_hdr_ptr = (struct iscsi_text_rsp *)&qedi_conn->gen_pdu.resp_hdr;
104 memset(resp_hdr_ptr, 0, sizeof(struct iscsi_hdr));
105 resp_hdr_ptr->opcode = cqe_text_response->opcode;
106 resp_hdr_ptr->flags = cqe_text_response->flags;
107 resp_hdr_ptr->hlength = 0;
108
109 hton24(resp_hdr_ptr->dlength,
110 (cqe_text_response->hdr_second_dword &
111 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK));
112
113 resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
114 conn->session->age);
115 resp_hdr_ptr->ttt = cqe_text_response->ttt;
116 resp_hdr_ptr->statsn = cpu_to_be32(cqe_text_response->stat_sn);
117 resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_text_response->exp_cmd_sn);
118 resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_text_response->max_cmd_sn);
119
120 pld_len = cqe_text_response->hdr_second_dword &
121 ISCSI_TEXT_RESPONSE_HDR_DATA_SEG_LEN_MASK;
122 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
123
124 memset(task_ctx, '\0', sizeof(*task_ctx));
125
126 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
127 "Freeing tid=0x%x for cid=0x%x\n",
128 cmd->task_id, qedi_conn->iscsi_conn_id);
129
130 spin_lock(&qedi_conn->list_lock);
131 if (likely(cmd->io_cmd_in_list)) {
132 cmd->io_cmd_in_list = false;
133 list_del_init(&cmd->io_cmd);
134 qedi_conn->active_cmd_count--;
135 } else {
136 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
137 "Active cmd list node already deleted, tid=0x%x, cid=0x%x, io_cmd_node=%p\n",
138 cmd->task_id, qedi_conn->iscsi_conn_id,
139 &cmd->io_cmd);
140 }
141 spin_unlock(&qedi_conn->list_lock);
142
143 cmd->state = RESPONSE_RECEIVED;
144 qedi_clear_task_idx(qedi, cmd->task_id);
145
146 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
147 qedi_conn->gen_pdu.resp_buf,
148 (qedi_conn->gen_pdu.resp_wr_ptr -
149 qedi_conn->gen_pdu.resp_buf));
150 spin_unlock(&session->back_lock);
151 }
152
qedi_tmf_resp_work(struct work_struct * work)153 static void qedi_tmf_resp_work(struct work_struct *work)
154 {
155 struct qedi_cmd *qedi_cmd =
156 container_of(work, struct qedi_cmd, tmf_work);
157 struct qedi_conn *qedi_conn = qedi_cmd->conn;
158 struct qedi_ctx *qedi = qedi_conn->qedi;
159 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
160 struct iscsi_session *session = conn->session;
161 struct iscsi_tm_rsp *resp_hdr_ptr;
162 struct iscsi_cls_session *cls_sess;
163 int rval = 0;
164
165 set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
166 resp_hdr_ptr = (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
167 cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
168
169 iscsi_block_session(session->cls_session);
170 rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
171 if (rval) {
172 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
173 iscsi_unblock_session(session->cls_session);
174 goto exit_tmf_resp;
175 }
176
177 iscsi_unblock_session(session->cls_session);
178 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
179
180 spin_lock(&session->back_lock);
181 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
182 spin_unlock(&session->back_lock);
183
184 exit_tmf_resp:
185 kfree(resp_hdr_ptr);
186 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
187 }
188
qedi_process_tmf_resp(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn)189 static void qedi_process_tmf_resp(struct qedi_ctx *qedi,
190 union iscsi_cqe *cqe,
191 struct iscsi_task *task,
192 struct qedi_conn *qedi_conn)
193
194 {
195 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
196 struct iscsi_session *session = conn->session;
197 struct iscsi_tmf_response_hdr *cqe_tmp_response;
198 struct iscsi_tm_rsp *resp_hdr_ptr;
199 struct iscsi_tm *tmf_hdr;
200 struct qedi_cmd *qedi_cmd = NULL;
201
202 cqe_tmp_response = &cqe->cqe_common.iscsi_hdr.tmf_response;
203
204 qedi_cmd = task->dd_data;
205 qedi_cmd->tmf_resp_buf = kzalloc(sizeof(*resp_hdr_ptr), GFP_ATOMIC);
206 if (!qedi_cmd->tmf_resp_buf) {
207 QEDI_ERR(&qedi->dbg_ctx,
208 "Failed to allocate resp buf, cid=0x%x\n",
209 qedi_conn->iscsi_conn_id);
210 return;
211 }
212
213 spin_lock(&session->back_lock);
214 resp_hdr_ptr = (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;
215 memset(resp_hdr_ptr, 0, sizeof(struct iscsi_tm_rsp));
216
217 /* Fill up the header */
218 resp_hdr_ptr->opcode = cqe_tmp_response->opcode;
219 resp_hdr_ptr->flags = cqe_tmp_response->hdr_flags;
220 resp_hdr_ptr->response = cqe_tmp_response->hdr_response;
221 resp_hdr_ptr->hlength = 0;
222
223 hton24(resp_hdr_ptr->dlength,
224 (cqe_tmp_response->hdr_second_dword &
225 ISCSI_TMF_RESPONSE_HDR_DATA_SEG_LEN_MASK));
226 resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
227 conn->session->age);
228 resp_hdr_ptr->statsn = cpu_to_be32(cqe_tmp_response->stat_sn);
229 resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_tmp_response->exp_cmd_sn);
230 resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_tmp_response->max_cmd_sn);
231
232 tmf_hdr = (struct iscsi_tm *)qedi_cmd->task->hdr;
233
234 spin_lock(&qedi_conn->list_lock);
235 if (likely(qedi_cmd->io_cmd_in_list)) {
236 qedi_cmd->io_cmd_in_list = false;
237 list_del_init(&qedi_cmd->io_cmd);
238 qedi_conn->active_cmd_count--;
239 }
240 spin_unlock(&qedi_conn->list_lock);
241
242 if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
243 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
244 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
245 ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
246 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
247 ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
248 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_resp_work);
249 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
250 goto unblock_sess;
251 }
252
253 qedi_clear_task_idx(qedi, qedi_cmd->task_id);
254
255 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);
256 kfree(resp_hdr_ptr);
257
258 unblock_sess:
259 spin_unlock(&session->back_lock);
260 }
261
qedi_process_login_resp(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn)262 static void qedi_process_login_resp(struct qedi_ctx *qedi,
263 union iscsi_cqe *cqe,
264 struct iscsi_task *task,
265 struct qedi_conn *qedi_conn)
266 {
267 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
268 struct iscsi_session *session = conn->session;
269 struct e4_iscsi_task_context *task_ctx;
270 struct iscsi_login_rsp *resp_hdr_ptr;
271 struct iscsi_login_response_hdr *cqe_login_response;
272 struct qedi_cmd *cmd;
273 int pld_len;
274
275 cmd = (struct qedi_cmd *)task->dd_data;
276
277 cqe_login_response = &cqe->cqe_common.iscsi_hdr.login_response;
278 task_ctx = qedi_get_task_mem(&qedi->tasks, cmd->task_id);
279
280 spin_lock(&session->back_lock);
281 resp_hdr_ptr = (struct iscsi_login_rsp *)&qedi_conn->gen_pdu.resp_hdr;
282 memset(resp_hdr_ptr, 0, sizeof(struct iscsi_login_rsp));
283 resp_hdr_ptr->opcode = cqe_login_response->opcode;
284 resp_hdr_ptr->flags = cqe_login_response->flags_attr;
285 resp_hdr_ptr->hlength = 0;
286
287 hton24(resp_hdr_ptr->dlength,
288 (cqe_login_response->hdr_second_dword &
289 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK));
290 resp_hdr_ptr->itt = build_itt(cqe->cqe_solicited.itid,
291 conn->session->age);
292 resp_hdr_ptr->tsih = cqe_login_response->tsih;
293 resp_hdr_ptr->statsn = cpu_to_be32(cqe_login_response->stat_sn);
294 resp_hdr_ptr->exp_cmdsn = cpu_to_be32(cqe_login_response->exp_cmd_sn);
295 resp_hdr_ptr->max_cmdsn = cpu_to_be32(cqe_login_response->max_cmd_sn);
296 resp_hdr_ptr->status_class = cqe_login_response->status_class;
297 resp_hdr_ptr->status_detail = cqe_login_response->status_detail;
298 pld_len = cqe_login_response->hdr_second_dword &
299 ISCSI_LOGIN_RESPONSE_HDR_DATA_SEG_LEN_MASK;
300 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf + pld_len;
301
302 spin_lock(&qedi_conn->list_lock);
303 if (likely(cmd->io_cmd_in_list)) {
304 cmd->io_cmd_in_list = false;
305 list_del_init(&cmd->io_cmd);
306 qedi_conn->active_cmd_count--;
307 }
308 spin_unlock(&qedi_conn->list_lock);
309
310 memset(task_ctx, '\0', sizeof(*task_ctx));
311
312 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr,
313 qedi_conn->gen_pdu.resp_buf,
314 (qedi_conn->gen_pdu.resp_wr_ptr -
315 qedi_conn->gen_pdu.resp_buf));
316
317 spin_unlock(&session->back_lock);
318 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
319 "Freeing tid=0x%x for cid=0x%x\n",
320 cmd->task_id, qedi_conn->iscsi_conn_id);
321 cmd->state = RESPONSE_RECEIVED;
322 qedi_clear_task_idx(qedi, cmd->task_id);
323 }
324
qedi_get_rq_bdq_buf(struct qedi_ctx * qedi,struct iscsi_cqe_unsolicited * cqe,char * ptr,int len)325 static void qedi_get_rq_bdq_buf(struct qedi_ctx *qedi,
326 struct iscsi_cqe_unsolicited *cqe,
327 char *ptr, int len)
328 {
329 u16 idx = 0;
330
331 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
332 "pld_len [%d], bdq_prod_idx [%d], idx [%d]\n",
333 len, qedi->bdq_prod_idx,
334 (qedi->bdq_prod_idx % qedi->rq_num_entries));
335
336 /* Obtain buffer address from rqe_opaque */
337 idx = cqe->rqe_opaque;
338 if (idx > (QEDI_BDQ_NUM - 1)) {
339 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
340 "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
341 idx);
342 return;
343 }
344
345 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
346 "rqe_opaque [0x%p], idx [%d]\n", cqe->rqe_opaque, idx);
347
348 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
349 "unsol_cqe_type = %d\n", cqe->unsol_cqe_type);
350 switch (cqe->unsol_cqe_type) {
351 case ISCSI_CQE_UNSOLICITED_SINGLE:
352 case ISCSI_CQE_UNSOLICITED_FIRST:
353 if (len)
354 memcpy(ptr, (void *)qedi->bdq[idx].buf_addr, len);
355 break;
356 case ISCSI_CQE_UNSOLICITED_MIDDLE:
357 case ISCSI_CQE_UNSOLICITED_LAST:
358 break;
359 default:
360 break;
361 }
362 }
363
qedi_put_rq_bdq_buf(struct qedi_ctx * qedi,struct iscsi_cqe_unsolicited * cqe,int count)364 static void qedi_put_rq_bdq_buf(struct qedi_ctx *qedi,
365 struct iscsi_cqe_unsolicited *cqe,
366 int count)
367 {
368 u16 tmp;
369 u16 idx = 0;
370 struct scsi_bd *pbl;
371
372 /* Obtain buffer address from rqe_opaque */
373 idx = cqe->rqe_opaque;
374 if (idx > (QEDI_BDQ_NUM - 1)) {
375 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
376 "wrong idx %d returned by FW, dropping the unsolicited pkt\n",
377 idx);
378 return;
379 }
380
381 pbl = (struct scsi_bd *)qedi->bdq_pbl;
382 pbl += (qedi->bdq_prod_idx % qedi->rq_num_entries);
383 pbl->address.hi = cpu_to_le32(QEDI_U64_HI(qedi->bdq[idx].buf_dma));
384 pbl->address.lo = cpu_to_le32(QEDI_U64_LO(qedi->bdq[idx].buf_dma));
385 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
386 "pbl [0x%p] pbl->address hi [0x%llx] lo [0x%llx] idx [%d]\n",
387 pbl, pbl->address.hi, pbl->address.lo, idx);
388 pbl->opaque.iscsi_opaque.reserved_zero[0] = 0;
389 pbl->opaque.iscsi_opaque.reserved_zero[1] = 0;
390 pbl->opaque.iscsi_opaque.reserved_zero[2] = 0;
391 pbl->opaque.iscsi_opaque.opaque = cpu_to_le32(idx);
392
393 /* Increment producer to let f/w know we've handled the frame */
394 qedi->bdq_prod_idx += count;
395
396 writew(qedi->bdq_prod_idx, qedi->bdq_primary_prod);
397 tmp = readw(qedi->bdq_primary_prod);
398
399 writew(qedi->bdq_prod_idx, qedi->bdq_secondary_prod);
400 tmp = readw(qedi->bdq_secondary_prod);
401 }
402
qedi_unsol_pdu_adjust_bdq(struct qedi_ctx * qedi,struct iscsi_cqe_unsolicited * cqe,u32 pdu_len,u32 num_bdqs,char * bdq_data)403 static void qedi_unsol_pdu_adjust_bdq(struct qedi_ctx *qedi,
404 struct iscsi_cqe_unsolicited *cqe,
405 u32 pdu_len, u32 num_bdqs,
406 char *bdq_data)
407 {
408 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
409 "num_bdqs [%d]\n", num_bdqs);
410
411 qedi_get_rq_bdq_buf(qedi, cqe, bdq_data, pdu_len);
412 qedi_put_rq_bdq_buf(qedi, cqe, (num_bdqs + 1));
413 }
414
qedi_process_nopin_mesg(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn,u16 que_idx)415 static int qedi_process_nopin_mesg(struct qedi_ctx *qedi,
416 union iscsi_cqe *cqe,
417 struct iscsi_task *task,
418 struct qedi_conn *qedi_conn, u16 que_idx)
419 {
420 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
421 struct iscsi_session *session = conn->session;
422 struct iscsi_nop_in_hdr *cqe_nop_in;
423 struct iscsi_nopin *hdr;
424 struct qedi_cmd *cmd;
425 int tgt_async_nop = 0;
426 u32 lun[2];
427 u32 pdu_len, num_bdqs;
428 char bdq_data[QEDI_BDQ_BUF_SIZE];
429 unsigned long flags;
430
431 spin_lock_bh(&session->back_lock);
432 cqe_nop_in = &cqe->cqe_common.iscsi_hdr.nop_in;
433
434 pdu_len = cqe_nop_in->hdr_second_dword &
435 ISCSI_NOP_IN_HDR_DATA_SEG_LEN_MASK;
436 num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
437
438 hdr = (struct iscsi_nopin *)&qedi_conn->gen_pdu.resp_hdr;
439 memset(hdr, 0, sizeof(struct iscsi_hdr));
440 hdr->opcode = cqe_nop_in->opcode;
441 hdr->max_cmdsn = cpu_to_be32(cqe_nop_in->max_cmd_sn);
442 hdr->exp_cmdsn = cpu_to_be32(cqe_nop_in->exp_cmd_sn);
443 hdr->statsn = cpu_to_be32(cqe_nop_in->stat_sn);
444 hdr->ttt = cpu_to_be32(cqe_nop_in->ttt);
445
446 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
447 spin_lock_irqsave(&qedi->hba_lock, flags);
448 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
449 pdu_len, num_bdqs, bdq_data);
450 hdr->itt = RESERVED_ITT;
451 tgt_async_nop = 1;
452 spin_unlock_irqrestore(&qedi->hba_lock, flags);
453 goto done;
454 }
455
456 /* Response to one of our nop-outs */
457 if (task) {
458 cmd = task->dd_data;
459 hdr->flags = ISCSI_FLAG_CMD_FINAL;
460 hdr->itt = build_itt(cqe->cqe_solicited.itid,
461 conn->session->age);
462 lun[0] = 0xffffffff;
463 lun[1] = 0xffffffff;
464 memcpy(&hdr->lun, lun, sizeof(struct scsi_lun));
465 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
466 "Freeing tid=0x%x for cid=0x%x\n",
467 cmd->task_id, qedi_conn->iscsi_conn_id);
468 cmd->state = RESPONSE_RECEIVED;
469 spin_lock(&qedi_conn->list_lock);
470 if (likely(cmd->io_cmd_in_list)) {
471 cmd->io_cmd_in_list = false;
472 list_del_init(&cmd->io_cmd);
473 qedi_conn->active_cmd_count--;
474 }
475
476 spin_unlock(&qedi_conn->list_lock);
477 qedi_clear_task_idx(qedi, cmd->task_id);
478 }
479
480 done:
481 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, bdq_data, pdu_len);
482
483 spin_unlock_bh(&session->back_lock);
484 return tgt_async_nop;
485 }
486
qedi_process_async_mesg(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn,u16 que_idx)487 static void qedi_process_async_mesg(struct qedi_ctx *qedi,
488 union iscsi_cqe *cqe,
489 struct iscsi_task *task,
490 struct qedi_conn *qedi_conn,
491 u16 que_idx)
492 {
493 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
494 struct iscsi_session *session = conn->session;
495 struct iscsi_async_msg_hdr *cqe_async_msg;
496 struct iscsi_async *resp_hdr;
497 u32 lun[2];
498 u32 pdu_len, num_bdqs;
499 char bdq_data[QEDI_BDQ_BUF_SIZE];
500 unsigned long flags;
501
502 spin_lock_bh(&session->back_lock);
503
504 cqe_async_msg = &cqe->cqe_common.iscsi_hdr.async_msg;
505 pdu_len = cqe_async_msg->hdr_second_dword &
506 ISCSI_ASYNC_MSG_HDR_DATA_SEG_LEN_MASK;
507 num_bdqs = pdu_len / QEDI_BDQ_BUF_SIZE;
508
509 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
510 spin_lock_irqsave(&qedi->hba_lock, flags);
511 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
512 pdu_len, num_bdqs, bdq_data);
513 spin_unlock_irqrestore(&qedi->hba_lock, flags);
514 }
515
516 resp_hdr = (struct iscsi_async *)&qedi_conn->gen_pdu.resp_hdr;
517 memset(resp_hdr, 0, sizeof(struct iscsi_hdr));
518 resp_hdr->opcode = cqe_async_msg->opcode;
519 resp_hdr->flags = 0x80;
520
521 lun[0] = cpu_to_be32(cqe_async_msg->lun.lo);
522 lun[1] = cpu_to_be32(cqe_async_msg->lun.hi);
523 memcpy(&resp_hdr->lun, lun, sizeof(struct scsi_lun));
524 resp_hdr->exp_cmdsn = cpu_to_be32(cqe_async_msg->exp_cmd_sn);
525 resp_hdr->max_cmdsn = cpu_to_be32(cqe_async_msg->max_cmd_sn);
526 resp_hdr->statsn = cpu_to_be32(cqe_async_msg->stat_sn);
527
528 resp_hdr->async_event = cqe_async_msg->async_event;
529 resp_hdr->async_vcode = cqe_async_msg->async_vcode;
530
531 resp_hdr->param1 = cpu_to_be16(cqe_async_msg->param1_rsrv);
532 resp_hdr->param2 = cpu_to_be16(cqe_async_msg->param2_rsrv);
533 resp_hdr->param3 = cpu_to_be16(cqe_async_msg->param3_rsrv);
534
535 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr, bdq_data,
536 pdu_len);
537
538 spin_unlock_bh(&session->back_lock);
539 }
540
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)541 static void qedi_process_reject_mesg(struct qedi_ctx *qedi,
542 union iscsi_cqe *cqe,
543 struct iscsi_task *task,
544 struct qedi_conn *qedi_conn,
545 uint16_t que_idx)
546 {
547 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
548 struct iscsi_session *session = conn->session;
549 struct iscsi_reject_hdr *cqe_reject;
550 struct iscsi_reject *hdr;
551 u32 pld_len, num_bdqs;
552 unsigned long flags;
553
554 spin_lock_bh(&session->back_lock);
555 cqe_reject = &cqe->cqe_common.iscsi_hdr.reject;
556 pld_len = cqe_reject->hdr_second_dword &
557 ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK;
558 num_bdqs = pld_len / QEDI_BDQ_BUF_SIZE;
559
560 if (cqe->cqe_common.cqe_type == ISCSI_CQE_TYPE_UNSOLICITED) {
561 spin_lock_irqsave(&qedi->hba_lock, flags);
562 qedi_unsol_pdu_adjust_bdq(qedi, &cqe->cqe_unsolicited,
563 pld_len, num_bdqs, conn->data);
564 spin_unlock_irqrestore(&qedi->hba_lock, flags);
565 }
566 hdr = (struct iscsi_reject *)&qedi_conn->gen_pdu.resp_hdr;
567 memset(hdr, 0, sizeof(struct iscsi_hdr));
568 hdr->opcode = cqe_reject->opcode;
569 hdr->reason = cqe_reject->hdr_reason;
570 hdr->flags = cqe_reject->hdr_flags;
571 hton24(hdr->dlength, (cqe_reject->hdr_second_dword &
572 ISCSI_REJECT_HDR_DATA_SEG_LEN_MASK));
573 hdr->max_cmdsn = cpu_to_be32(cqe_reject->max_cmd_sn);
574 hdr->exp_cmdsn = cpu_to_be32(cqe_reject->exp_cmd_sn);
575 hdr->statsn = cpu_to_be32(cqe_reject->stat_sn);
576 hdr->ffffffff = cpu_to_be32(0xffffffff);
577
578 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
579 conn->data, pld_len);
580 spin_unlock_bh(&session->back_lock);
581 }
582
qedi_scsi_completion(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct iscsi_conn * conn)583 static void qedi_scsi_completion(struct qedi_ctx *qedi,
584 union iscsi_cqe *cqe,
585 struct iscsi_task *task,
586 struct iscsi_conn *conn)
587 {
588 struct scsi_cmnd *sc_cmd;
589 struct qedi_cmd *cmd = task->dd_data;
590 struct iscsi_session *session = conn->session;
591 struct iscsi_scsi_rsp *hdr;
592 struct iscsi_data_in_hdr *cqe_data_in;
593 int datalen = 0;
594 struct qedi_conn *qedi_conn;
595 u32 iscsi_cid;
596 u8 cqe_err_bits = 0;
597
598 iscsi_cid = cqe->cqe_common.conn_id;
599 qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
600
601 cqe_data_in = &cqe->cqe_common.iscsi_hdr.data_in;
602 cqe_err_bits =
603 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
604
605 spin_lock_bh(&session->back_lock);
606 /* get the scsi command */
607 sc_cmd = cmd->scsi_cmd;
608
609 if (!sc_cmd) {
610 QEDI_WARN(&qedi->dbg_ctx, "sc_cmd is NULL!\n");
611 goto error;
612 }
613
614 if (!sc_cmd->SCp.ptr) {
615 QEDI_WARN(&qedi->dbg_ctx,
616 "SCp.ptr is NULL, returned in another context.\n");
617 goto error;
618 }
619
620 if (!sc_cmd->request) {
621 QEDI_WARN(&qedi->dbg_ctx,
622 "sc_cmd->request is NULL, sc_cmd=%p.\n",
623 sc_cmd);
624 goto error;
625 }
626
627 if (!sc_cmd->request->special) {
628 QEDI_WARN(&qedi->dbg_ctx,
629 "request->special is NULL so request not valid, sc_cmd=%p.\n",
630 sc_cmd);
631 goto error;
632 }
633
634 if (!sc_cmd->request->q) {
635 QEDI_WARN(&qedi->dbg_ctx,
636 "request->q is NULL so request is not valid, sc_cmd=%p.\n",
637 sc_cmd);
638 goto error;
639 }
640
641 qedi_iscsi_unmap_sg_list(cmd);
642
643 hdr = (struct iscsi_scsi_rsp *)task->hdr;
644 hdr->opcode = cqe_data_in->opcode;
645 hdr->max_cmdsn = cpu_to_be32(cqe_data_in->max_cmd_sn);
646 hdr->exp_cmdsn = cpu_to_be32(cqe_data_in->exp_cmd_sn);
647 hdr->itt = build_itt(cqe->cqe_solicited.itid, conn->session->age);
648 hdr->response = cqe_data_in->reserved1;
649 hdr->cmd_status = cqe_data_in->status_rsvd;
650 hdr->flags = cqe_data_in->flags;
651 hdr->residual_count = cpu_to_be32(cqe_data_in->residual_count);
652
653 if (hdr->cmd_status == SAM_STAT_CHECK_CONDITION) {
654 datalen = cqe_data_in->reserved2 &
655 ISCSI_COMMON_HDR_DATA_SEG_LEN_MASK;
656 memcpy((char *)conn->data, (char *)cmd->sense_buffer, datalen);
657 }
658
659 /* If f/w reports data underrun err then set residual to IO transfer
660 * length, set Underrun flag and clear Overrun flag explicitly
661 */
662 if (unlikely(cqe_err_bits &&
663 GET_FIELD(cqe_err_bits, CQE_ERROR_BITMAP_UNDER_RUN_ERR))) {
664 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
665 "Under flow itt=0x%x proto flags=0x%x tid=0x%x cid 0x%x fw resid 0x%x sc dlen 0x%x\n",
666 hdr->itt, cqe_data_in->flags, cmd->task_id,
667 qedi_conn->iscsi_conn_id, hdr->residual_count,
668 scsi_bufflen(sc_cmd));
669 hdr->residual_count = cpu_to_be32(scsi_bufflen(sc_cmd));
670 hdr->flags |= ISCSI_FLAG_CMD_UNDERFLOW;
671 hdr->flags &= (~ISCSI_FLAG_CMD_OVERFLOW);
672 }
673
674 spin_lock(&qedi_conn->list_lock);
675 if (likely(cmd->io_cmd_in_list)) {
676 cmd->io_cmd_in_list = false;
677 list_del_init(&cmd->io_cmd);
678 qedi_conn->active_cmd_count--;
679 }
680 spin_unlock(&qedi_conn->list_lock);
681
682 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
683 "Freeing tid=0x%x for cid=0x%x\n",
684 cmd->task_id, qedi_conn->iscsi_conn_id);
685 cmd->state = RESPONSE_RECEIVED;
686 if (qedi_io_tracing)
687 qedi_trace_io(qedi, task, cmd->task_id, QEDI_IO_TRACE_RSP);
688
689 qedi_clear_task_idx(qedi, cmd->task_id);
690 __iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr,
691 conn->data, datalen);
692 error:
693 spin_unlock_bh(&session->back_lock);
694 }
695
qedi_mtask_completion(struct qedi_ctx * qedi,union iscsi_cqe * cqe,struct iscsi_task * task,struct qedi_conn * conn,uint16_t que_idx)696 static void qedi_mtask_completion(struct qedi_ctx *qedi,
697 union iscsi_cqe *cqe,
698 struct iscsi_task *task,
699 struct qedi_conn *conn, uint16_t que_idx)
700 {
701 struct iscsi_conn *iscsi_conn;
702 u32 hdr_opcode;
703
704 hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
705 iscsi_conn = conn->cls_conn->dd_data;
706
707 switch (hdr_opcode) {
708 case ISCSI_OPCODE_SCSI_RESPONSE:
709 case ISCSI_OPCODE_DATA_IN:
710 qedi_scsi_completion(qedi, cqe, task, iscsi_conn);
711 break;
712 case ISCSI_OPCODE_LOGIN_RESPONSE:
713 qedi_process_login_resp(qedi, cqe, task, conn);
714 break;
715 case ISCSI_OPCODE_TMF_RESPONSE:
716 qedi_process_tmf_resp(qedi, cqe, task, conn);
717 break;
718 case ISCSI_OPCODE_TEXT_RESPONSE:
719 qedi_process_text_resp(qedi, cqe, task, conn);
720 break;
721 case ISCSI_OPCODE_LOGOUT_RESPONSE:
722 qedi_process_logout_resp(qedi, cqe, task, conn);
723 break;
724 case ISCSI_OPCODE_NOP_IN:
725 qedi_process_nopin_mesg(qedi, cqe, task, conn, que_idx);
726 break;
727 default:
728 QEDI_ERR(&qedi->dbg_ctx, "unknown opcode\n");
729 }
730 }
731
qedi_process_nopin_local_cmpl(struct qedi_ctx * qedi,struct iscsi_cqe_solicited * cqe,struct iscsi_task * task,struct qedi_conn * qedi_conn)732 static void qedi_process_nopin_local_cmpl(struct qedi_ctx *qedi,
733 struct iscsi_cqe_solicited *cqe,
734 struct iscsi_task *task,
735 struct qedi_conn *qedi_conn)
736 {
737 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
738 struct iscsi_session *session = conn->session;
739 struct qedi_cmd *cmd = task->dd_data;
740
741 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_UNSOL,
742 "itid=0x%x, cmd task id=0x%x\n",
743 cqe->itid, cmd->task_id);
744
745 cmd->state = RESPONSE_RECEIVED;
746 qedi_clear_task_idx(qedi, cmd->task_id);
747
748 spin_lock_bh(&session->back_lock);
749 __iscsi_put_task(task);
750 spin_unlock_bh(&session->back_lock);
751 }
752
qedi_process_cmd_cleanup_resp(struct qedi_ctx * qedi,struct iscsi_cqe_solicited * cqe,struct iscsi_task * task,struct iscsi_conn * conn)753 static void qedi_process_cmd_cleanup_resp(struct qedi_ctx *qedi,
754 struct iscsi_cqe_solicited *cqe,
755 struct iscsi_task *task,
756 struct iscsi_conn *conn)
757 {
758 struct qedi_work_map *work, *work_tmp;
759 u32 proto_itt = cqe->itid;
760 u32 ptmp_itt = 0;
761 itt_t protoitt = 0;
762 int found = 0;
763 struct qedi_cmd *qedi_cmd = NULL;
764 u32 rtid = 0;
765 u32 iscsi_cid;
766 struct qedi_conn *qedi_conn;
767 struct qedi_cmd *dbg_cmd;
768 struct iscsi_task *mtask;
769 struct iscsi_tm *tmf_hdr = NULL;
770
771 iscsi_cid = cqe->conn_id;
772 qedi_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
773 if (!qedi_conn) {
774 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
775 "icid not found 0x%x\n", cqe->conn_id);
776 return;
777 }
778
779 /* Based on this itt get the corresponding qedi_cmd */
780 spin_lock_bh(&qedi_conn->tmf_work_lock);
781 list_for_each_entry_safe(work, work_tmp, &qedi_conn->tmf_work_list,
782 list) {
783 if (work->rtid == proto_itt) {
784 /* We found the command */
785 qedi_cmd = work->qedi_cmd;
786 if (!qedi_cmd->list_tmf_work) {
787 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
788 "TMF work not found, cqe->tid=0x%x, cid=0x%x\n",
789 proto_itt, qedi_conn->iscsi_conn_id);
790 WARN_ON(1);
791 }
792 found = 1;
793 mtask = qedi_cmd->task;
794 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
795 rtid = work->rtid;
796
797 list_del_init(&work->list);
798 kfree(work);
799 qedi_cmd->list_tmf_work = NULL;
800 }
801 }
802 spin_unlock_bh(&qedi_conn->tmf_work_lock);
803
804 if (found) {
805 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
806 "TMF work, cqe->tid=0x%x, tmf flags=0x%x, cid=0x%x\n",
807 proto_itt, tmf_hdr->flags, qedi_conn->iscsi_conn_id);
808
809 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
810 ISCSI_TM_FUNC_ABORT_TASK) {
811 spin_lock_bh(&conn->session->back_lock);
812
813 protoitt = build_itt(get_itt(tmf_hdr->rtt),
814 conn->session->age);
815 task = iscsi_itt_to_task(conn, protoitt);
816
817 spin_unlock_bh(&conn->session->back_lock);
818
819 if (!task) {
820 QEDI_NOTICE(&qedi->dbg_ctx,
821 "IO task completed, tmf rtt=0x%x, cid=0x%x\n",
822 get_itt(tmf_hdr->rtt),
823 qedi_conn->iscsi_conn_id);
824 return;
825 }
826
827 dbg_cmd = task->dd_data;
828
829 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
830 "Abort tmf rtt=0x%x, i/o itt=0x%x, i/o tid=0x%x, cid=0x%x\n",
831 get_itt(tmf_hdr->rtt), get_itt(task->itt),
832 dbg_cmd->task_id, qedi_conn->iscsi_conn_id);
833
834 if (qedi_cmd->state == CLEANUP_WAIT_FAILED)
835 qedi_cmd->state = CLEANUP_RECV;
836
837 qedi_clear_task_idx(qedi_conn->qedi, rtid);
838
839 spin_lock(&qedi_conn->list_lock);
840 if (likely(dbg_cmd->io_cmd_in_list)) {
841 dbg_cmd->io_cmd_in_list = false;
842 list_del_init(&dbg_cmd->io_cmd);
843 qedi_conn->active_cmd_count--;
844 }
845 spin_unlock(&qedi_conn->list_lock);
846 qedi_cmd->state = CLEANUP_RECV;
847 wake_up_interruptible(&qedi_conn->wait_queue);
848 }
849 } else if (qedi_conn->cmd_cleanup_req > 0) {
850 spin_lock_bh(&conn->session->back_lock);
851 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
852 protoitt = build_itt(ptmp_itt, conn->session->age);
853 task = iscsi_itt_to_task(conn, protoitt);
854 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
855 "cleanup io itid=0x%x, protoitt=0x%x, cmd_cleanup_cmpl=%d, cid=0x%x\n",
856 cqe->itid, protoitt, qedi_conn->cmd_cleanup_cmpl,
857 qedi_conn->iscsi_conn_id);
858
859 spin_unlock_bh(&conn->session->back_lock);
860 if (!task) {
861 QEDI_NOTICE(&qedi->dbg_ctx,
862 "task is null, itid=0x%x, cid=0x%x\n",
863 cqe->itid, qedi_conn->iscsi_conn_id);
864 return;
865 }
866 qedi_conn->cmd_cleanup_cmpl++;
867 wake_up(&qedi_conn->wait_queue);
868
869 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_TID,
870 "Freeing tid=0x%x for cid=0x%x\n",
871 cqe->itid, qedi_conn->iscsi_conn_id);
872 qedi_clear_task_idx(qedi_conn->qedi, cqe->itid);
873
874 } else {
875 qedi_get_proto_itt(qedi, cqe->itid, &ptmp_itt);
876 protoitt = build_itt(ptmp_itt, conn->session->age);
877 task = iscsi_itt_to_task(conn, protoitt);
878 QEDI_ERR(&qedi->dbg_ctx,
879 "Delayed or untracked cleanup response, itt=0x%x, tid=0x%x, cid=0x%x, task=%p\n",
880 protoitt, cqe->itid, qedi_conn->iscsi_conn_id, task);
881 }
882 }
883
qedi_fp_process_cqes(struct qedi_work * work)884 void qedi_fp_process_cqes(struct qedi_work *work)
885 {
886 struct qedi_ctx *qedi = work->qedi;
887 union iscsi_cqe *cqe = &work->cqe;
888 struct iscsi_task *task = NULL;
889 struct iscsi_nopout *nopout_hdr;
890 struct qedi_conn *q_conn;
891 struct iscsi_conn *conn;
892 struct qedi_cmd *qedi_cmd;
893 u32 comp_type;
894 u32 iscsi_cid;
895 u32 hdr_opcode;
896 u16 que_idx = work->que_idx;
897 u8 cqe_err_bits = 0;
898
899 comp_type = cqe->cqe_common.cqe_type;
900 hdr_opcode = cqe->cqe_common.iscsi_hdr.common.hdr_first_byte;
901 cqe_err_bits =
902 cqe->cqe_common.error_bitmap.error_bits.cqe_error_status_bits;
903
904 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
905 "fw_cid=0x%x, cqe type=0x%x, opcode=0x%x\n",
906 cqe->cqe_common.conn_id, comp_type, hdr_opcode);
907
908 if (comp_type >= MAX_ISCSI_CQES_TYPE) {
909 QEDI_WARN(&qedi->dbg_ctx, "Invalid CqE type\n");
910 return;
911 }
912
913 iscsi_cid = cqe->cqe_common.conn_id;
914 q_conn = qedi->cid_que.conn_cid_tbl[iscsi_cid];
915 if (!q_conn) {
916 QEDI_WARN(&qedi->dbg_ctx,
917 "Session no longer exists for cid=0x%x!!\n",
918 iscsi_cid);
919 return;
920 }
921
922 conn = q_conn->cls_conn->dd_data;
923
924 if (unlikely(cqe_err_bits &&
925 GET_FIELD(cqe_err_bits,
926 CQE_ERROR_BITMAP_DATA_DIGEST_ERR))) {
927 iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST);
928 return;
929 }
930
931 switch (comp_type) {
932 case ISCSI_CQE_TYPE_SOLICITED:
933 case ISCSI_CQE_TYPE_SOLICITED_WITH_SENSE:
934 qedi_cmd = container_of(work, struct qedi_cmd, cqe_work);
935 task = qedi_cmd->task;
936 if (!task) {
937 QEDI_WARN(&qedi->dbg_ctx, "task is NULL\n");
938 return;
939 }
940
941 /* Process NOPIN local completion */
942 nopout_hdr = (struct iscsi_nopout *)task->hdr;
943 if ((nopout_hdr->itt == RESERVED_ITT) &&
944 (cqe->cqe_solicited.itid != (u16)RESERVED_ITT)) {
945 qedi_process_nopin_local_cmpl(qedi, &cqe->cqe_solicited,
946 task, q_conn);
947 } else {
948 cqe->cqe_solicited.itid =
949 qedi_get_itt(cqe->cqe_solicited);
950 /* Process other solicited responses */
951 qedi_mtask_completion(qedi, cqe, task, q_conn, que_idx);
952 }
953 break;
954 case ISCSI_CQE_TYPE_UNSOLICITED:
955 switch (hdr_opcode) {
956 case ISCSI_OPCODE_NOP_IN:
957 qedi_process_nopin_mesg(qedi, cqe, task, q_conn,
958 que_idx);
959 break;
960 case ISCSI_OPCODE_ASYNC_MSG:
961 qedi_process_async_mesg(qedi, cqe, task, q_conn,
962 que_idx);
963 break;
964 case ISCSI_OPCODE_REJECT:
965 qedi_process_reject_mesg(qedi, cqe, task, q_conn,
966 que_idx);
967 break;
968 }
969 goto exit_fp_process;
970 case ISCSI_CQE_TYPE_DUMMY:
971 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "Dummy CqE\n");
972 goto exit_fp_process;
973 case ISCSI_CQE_TYPE_TASK_CLEANUP:
974 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM, "CleanUp CqE\n");
975 qedi_process_cmd_cleanup_resp(qedi, &cqe->cqe_solicited, task,
976 conn);
977 goto exit_fp_process;
978 default:
979 QEDI_ERR(&qedi->dbg_ctx, "Error cqe.\n");
980 break;
981 }
982
983 exit_fp_process:
984 return;
985 }
986
qedi_ring_doorbell(struct qedi_conn * qedi_conn)987 static void qedi_ring_doorbell(struct qedi_conn *qedi_conn)
988 {
989 struct iscsi_db_data dbell = { 0 };
990
991 dbell.agg_flags = 0;
992
993 dbell.params |= DB_DEST_XCM << ISCSI_DB_DATA_DEST_SHIFT;
994 dbell.params |= DB_AGG_CMD_SET << ISCSI_DB_DATA_AGG_CMD_SHIFT;
995 dbell.params |=
996 DQ_XCM_ISCSI_SQ_PROD_CMD << ISCSI_DB_DATA_AGG_VAL_SEL_SHIFT;
997
998 dbell.sq_prod = qedi_conn->ep->fw_sq_prod_idx;
999 writel(*(u32 *)&dbell, qedi_conn->ep->p_doorbell);
1000
1001 /* Make sure fw write idx is coherent, and include both memory barriers
1002 * as a failsafe as for some architectures the call is the same but on
1003 * others they are two different assembly operations.
1004 */
1005 wmb();
1006 mmiowb();
1007 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_MP_REQ,
1008 "prod_idx=0x%x, fw_prod_idx=0x%x, cid=0x%x\n",
1009 qedi_conn->ep->sq_prod_idx, qedi_conn->ep->fw_sq_prod_idx,
1010 qedi_conn->iscsi_conn_id);
1011 }
1012
qedi_get_wqe_idx(struct qedi_conn * qedi_conn)1013 static u16 qedi_get_wqe_idx(struct qedi_conn *qedi_conn)
1014 {
1015 struct qedi_endpoint *ep;
1016 u16 rval;
1017
1018 ep = qedi_conn->ep;
1019 rval = ep->sq_prod_idx;
1020
1021 /* Increament SQ index */
1022 ep->sq_prod_idx++;
1023 ep->fw_sq_prod_idx++;
1024 if (ep->sq_prod_idx == QEDI_SQ_SIZE)
1025 ep->sq_prod_idx = 0;
1026
1027 return rval;
1028 }
1029
qedi_send_iscsi_login(struct qedi_conn * qedi_conn,struct iscsi_task * task)1030 int qedi_send_iscsi_login(struct qedi_conn *qedi_conn,
1031 struct iscsi_task *task)
1032 {
1033 struct iscsi_login_req_hdr login_req_pdu_header;
1034 struct scsi_sgl_task_params tx_sgl_task_params;
1035 struct scsi_sgl_task_params rx_sgl_task_params;
1036 struct iscsi_task_params task_params;
1037 struct e4_iscsi_task_context *fw_task_ctx;
1038 struct qedi_ctx *qedi = qedi_conn->qedi;
1039 struct iscsi_login_req *login_hdr;
1040 struct scsi_sge *resp_sge = NULL;
1041 struct qedi_cmd *qedi_cmd;
1042 struct qedi_endpoint *ep;
1043 s16 tid = 0;
1044 u16 sq_idx = 0;
1045 int rval = 0;
1046
1047 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1048 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1049 ep = qedi_conn->ep;
1050 login_hdr = (struct iscsi_login_req *)task->hdr;
1051
1052 tid = qedi_get_task_idx(qedi);
1053 if (tid == -1)
1054 return -ENOMEM;
1055
1056 fw_task_ctx =
1057 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1058 tid);
1059 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1060
1061 qedi_cmd->task_id = tid;
1062
1063 memset(&task_params, 0, sizeof(task_params));
1064 memset(&login_req_pdu_header, 0, sizeof(login_req_pdu_header));
1065 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1066 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1067 /* Update header info */
1068 login_req_pdu_header.opcode = login_hdr->opcode;
1069 login_req_pdu_header.version_min = login_hdr->min_version;
1070 login_req_pdu_header.version_max = login_hdr->max_version;
1071 login_req_pdu_header.flags_attr = login_hdr->flags;
1072 login_req_pdu_header.isid_tabc = swab32p((u32 *)login_hdr->isid);
1073 login_req_pdu_header.isid_d = swab16p((u16 *)&login_hdr->isid[4]);
1074
1075 login_req_pdu_header.tsih = login_hdr->tsih;
1076 login_req_pdu_header.hdr_second_dword = ntoh24(login_hdr->dlength);
1077
1078 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1079 login_req_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1080 login_req_pdu_header.cid = qedi_conn->iscsi_conn_id;
1081 login_req_pdu_header.cmd_sn = be32_to_cpu(login_hdr->cmdsn);
1082 login_req_pdu_header.exp_stat_sn = be32_to_cpu(login_hdr->exp_statsn);
1083 login_req_pdu_header.exp_stat_sn = 0;
1084
1085 /* Fill tx AHS and rx buffer */
1086 tx_sgl_task_params.sgl =
1087 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1088 tx_sgl_task_params.sgl_phys_addr.lo =
1089 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1090 tx_sgl_task_params.sgl_phys_addr.hi =
1091 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1092 tx_sgl_task_params.total_buffer_size = ntoh24(login_hdr->dlength);
1093 tx_sgl_task_params.num_sges = 1;
1094
1095 rx_sgl_task_params.sgl =
1096 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1097 rx_sgl_task_params.sgl_phys_addr.lo =
1098 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1099 rx_sgl_task_params.sgl_phys_addr.hi =
1100 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1101 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1102 rx_sgl_task_params.num_sges = 1;
1103
1104 /* Fill fw input params */
1105 task_params.context = fw_task_ctx;
1106 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1107 task_params.itid = tid;
1108 task_params.cq_rss_number = 0;
1109 task_params.tx_io_size = ntoh24(login_hdr->dlength);
1110 task_params.rx_io_size = resp_sge->sge_len;
1111
1112 sq_idx = qedi_get_wqe_idx(qedi_conn);
1113 task_params.sqe = &ep->sq[sq_idx];
1114
1115 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1116 rval = init_initiator_login_request_task(&task_params,
1117 &login_req_pdu_header,
1118 &tx_sgl_task_params,
1119 &rx_sgl_task_params);
1120 if (rval)
1121 return -1;
1122
1123 spin_lock(&qedi_conn->list_lock);
1124 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1125 qedi_cmd->io_cmd_in_list = true;
1126 qedi_conn->active_cmd_count++;
1127 spin_unlock(&qedi_conn->list_lock);
1128
1129 qedi_ring_doorbell(qedi_conn);
1130 return 0;
1131 }
1132
qedi_send_iscsi_logout(struct qedi_conn * qedi_conn,struct iscsi_task * task)1133 int qedi_send_iscsi_logout(struct qedi_conn *qedi_conn,
1134 struct iscsi_task *task)
1135 {
1136 struct iscsi_logout_req_hdr logout_pdu_header;
1137 struct scsi_sgl_task_params tx_sgl_task_params;
1138 struct scsi_sgl_task_params rx_sgl_task_params;
1139 struct iscsi_task_params task_params;
1140 struct e4_iscsi_task_context *fw_task_ctx;
1141 struct iscsi_logout *logout_hdr = NULL;
1142 struct qedi_ctx *qedi = qedi_conn->qedi;
1143 struct qedi_cmd *qedi_cmd;
1144 struct qedi_endpoint *ep;
1145 s16 tid = 0;
1146 u16 sq_idx = 0;
1147 int rval = 0;
1148
1149 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1150 logout_hdr = (struct iscsi_logout *)task->hdr;
1151 ep = qedi_conn->ep;
1152
1153 tid = qedi_get_task_idx(qedi);
1154 if (tid == -1)
1155 return -ENOMEM;
1156
1157 fw_task_ctx =
1158 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1159 tid);
1160 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1161
1162 qedi_cmd->task_id = tid;
1163
1164 memset(&task_params, 0, sizeof(task_params));
1165 memset(&logout_pdu_header, 0, sizeof(logout_pdu_header));
1166 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1167 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1168
1169 /* Update header info */
1170 logout_pdu_header.opcode = logout_hdr->opcode;
1171 logout_pdu_header.reason_code = 0x80 | logout_hdr->flags;
1172 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1173 logout_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1174 logout_pdu_header.exp_stat_sn = be32_to_cpu(logout_hdr->exp_statsn);
1175 logout_pdu_header.cmd_sn = be32_to_cpu(logout_hdr->cmdsn);
1176 logout_pdu_header.cid = qedi_conn->iscsi_conn_id;
1177
1178 /* Fill fw input params */
1179 task_params.context = fw_task_ctx;
1180 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1181 task_params.itid = tid;
1182 task_params.cq_rss_number = 0;
1183 task_params.tx_io_size = 0;
1184 task_params.rx_io_size = 0;
1185
1186 sq_idx = qedi_get_wqe_idx(qedi_conn);
1187 task_params.sqe = &ep->sq[sq_idx];
1188 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1189
1190 rval = init_initiator_logout_request_task(&task_params,
1191 &logout_pdu_header,
1192 NULL, NULL);
1193 if (rval)
1194 return -1;
1195
1196 spin_lock(&qedi_conn->list_lock);
1197 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1198 qedi_cmd->io_cmd_in_list = true;
1199 qedi_conn->active_cmd_count++;
1200 spin_unlock(&qedi_conn->list_lock);
1201
1202 qedi_ring_doorbell(qedi_conn);
1203 return 0;
1204 }
1205
qedi_cleanup_all_io(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn,struct iscsi_task * task,bool in_recovery)1206 int qedi_cleanup_all_io(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1207 struct iscsi_task *task, bool in_recovery)
1208 {
1209 int rval;
1210 struct iscsi_task *ctask;
1211 struct qedi_cmd *cmd, *cmd_tmp;
1212 struct iscsi_tm *tmf_hdr;
1213 unsigned int lun = 0;
1214 bool lun_reset = false;
1215 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1216 struct iscsi_session *session = conn->session;
1217
1218 /* From recovery, task is NULL or from tmf resp valid task */
1219 if (task) {
1220 tmf_hdr = (struct iscsi_tm *)task->hdr;
1221
1222 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1223 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) {
1224 lun_reset = true;
1225 lun = scsilun_to_int(&tmf_hdr->lun);
1226 }
1227 }
1228
1229 qedi_conn->cmd_cleanup_req = 0;
1230 qedi_conn->cmd_cleanup_cmpl = 0;
1231
1232 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1233 "active_cmd_count=%d, cid=0x%x, in_recovery=%d, lun_reset=%d\n",
1234 qedi_conn->active_cmd_count, qedi_conn->iscsi_conn_id,
1235 in_recovery, lun_reset);
1236
1237 if (lun_reset)
1238 spin_lock_bh(&session->back_lock);
1239
1240 spin_lock(&qedi_conn->list_lock);
1241
1242 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1243 io_cmd) {
1244 ctask = cmd->task;
1245 if (ctask == task)
1246 continue;
1247
1248 if (lun_reset) {
1249 if (cmd->scsi_cmd && cmd->scsi_cmd->device) {
1250 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1251 "tid=0x%x itt=0x%x scsi_cmd_ptr=%p device=%p task_state=%d cmd_state=0%x cid=0x%x\n",
1252 cmd->task_id, get_itt(ctask->itt),
1253 cmd->scsi_cmd, cmd->scsi_cmd->device,
1254 ctask->state, cmd->state,
1255 qedi_conn->iscsi_conn_id);
1256 if (cmd->scsi_cmd->device->lun != lun)
1257 continue;
1258 }
1259 }
1260 qedi_conn->cmd_cleanup_req++;
1261 qedi_iscsi_cleanup_task(ctask, true);
1262
1263 cmd->io_cmd_in_list = false;
1264 list_del_init(&cmd->io_cmd);
1265 qedi_conn->active_cmd_count--;
1266 QEDI_WARN(&qedi->dbg_ctx,
1267 "Deleted active cmd list node io_cmd=%p, cid=0x%x\n",
1268 &cmd->io_cmd, qedi_conn->iscsi_conn_id);
1269 }
1270
1271 spin_unlock(&qedi_conn->list_lock);
1272
1273 if (lun_reset)
1274 spin_unlock_bh(&session->back_lock);
1275
1276 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1277 "cmd_cleanup_req=%d, cid=0x%x\n",
1278 qedi_conn->cmd_cleanup_req,
1279 qedi_conn->iscsi_conn_id);
1280
1281 rval = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1282 ((qedi_conn->cmd_cleanup_req ==
1283 qedi_conn->cmd_cleanup_cmpl) ||
1284 qedi_conn->ep),
1285 5 * HZ);
1286 if (rval) {
1287 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1288 "i/o cmd_cleanup_req=%d, equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1289 qedi_conn->cmd_cleanup_req,
1290 qedi_conn->cmd_cleanup_cmpl,
1291 qedi_conn->iscsi_conn_id);
1292
1293 return 0;
1294 }
1295
1296 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1297 "i/o cmd_cleanup_req=%d, not equal to cmd_cleanup_cmpl=%d, cid=0x%x\n",
1298 qedi_conn->cmd_cleanup_req,
1299 qedi_conn->cmd_cleanup_cmpl,
1300 qedi_conn->iscsi_conn_id);
1301
1302 iscsi_host_for_each_session(qedi->shost,
1303 qedi_mark_device_missing);
1304 qedi_ops->common->drain(qedi->cdev);
1305
1306 /* Enable IOs for all other sessions except current.*/
1307 if (!wait_event_interruptible_timeout(qedi_conn->wait_queue,
1308 (qedi_conn->cmd_cleanup_req ==
1309 qedi_conn->cmd_cleanup_cmpl),
1310 5 * HZ)) {
1311 iscsi_host_for_each_session(qedi->shost,
1312 qedi_mark_device_available);
1313 return -1;
1314 }
1315
1316 iscsi_host_for_each_session(qedi->shost,
1317 qedi_mark_device_available);
1318
1319 return 0;
1320 }
1321
qedi_clearsq(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn,struct iscsi_task * task)1322 void qedi_clearsq(struct qedi_ctx *qedi, struct qedi_conn *qedi_conn,
1323 struct iscsi_task *task)
1324 {
1325 struct qedi_endpoint *qedi_ep;
1326 int rval;
1327
1328 qedi_ep = qedi_conn->ep;
1329 qedi_conn->cmd_cleanup_req = 0;
1330 qedi_conn->cmd_cleanup_cmpl = 0;
1331
1332 if (!qedi_ep) {
1333 QEDI_WARN(&qedi->dbg_ctx,
1334 "Cannot proceed, ep already disconnected, cid=0x%x\n",
1335 qedi_conn->iscsi_conn_id);
1336 return;
1337 }
1338
1339 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1340 "Clearing SQ for cid=0x%x, conn=%p, ep=%p\n",
1341 qedi_conn->iscsi_conn_id, qedi_conn, qedi_ep);
1342
1343 qedi_ops->clear_sq(qedi->cdev, qedi_ep->handle);
1344
1345 rval = qedi_cleanup_all_io(qedi, qedi_conn, task, true);
1346 if (rval) {
1347 QEDI_ERR(&qedi->dbg_ctx,
1348 "fatal error, need hard reset, cid=0x%x\n",
1349 qedi_conn->iscsi_conn_id);
1350 WARN_ON(1);
1351 }
1352 }
1353
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)1354 static int qedi_wait_for_cleanup_request(struct qedi_ctx *qedi,
1355 struct qedi_conn *qedi_conn,
1356 struct iscsi_task *task,
1357 struct qedi_cmd *qedi_cmd,
1358 struct qedi_work_map *list_work)
1359 {
1360 struct qedi_cmd *cmd = (struct qedi_cmd *)task->dd_data;
1361 int wait;
1362
1363 wait = wait_event_interruptible_timeout(qedi_conn->wait_queue,
1364 ((qedi_cmd->state ==
1365 CLEANUP_RECV) ||
1366 ((qedi_cmd->type == TYPEIO) &&
1367 (cmd->state ==
1368 RESPONSE_RECEIVED))),
1369 5 * HZ);
1370 if (!wait) {
1371 qedi_cmd->state = CLEANUP_WAIT_FAILED;
1372
1373 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1374 "Cleanup timedout tid=0x%x, issue connection recovery, cid=0x%x\n",
1375 cmd->task_id, qedi_conn->iscsi_conn_id);
1376
1377 return -1;
1378 }
1379 return 0;
1380 }
1381
qedi_tmf_work(struct work_struct * work)1382 static void qedi_tmf_work(struct work_struct *work)
1383 {
1384 struct qedi_cmd *qedi_cmd =
1385 container_of(work, struct qedi_cmd, tmf_work);
1386 struct qedi_conn *qedi_conn = qedi_cmd->conn;
1387 struct qedi_ctx *qedi = qedi_conn->qedi;
1388 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1389 struct iscsi_cls_session *cls_sess;
1390 struct qedi_work_map *list_work = NULL;
1391 struct iscsi_task *mtask;
1392 struct qedi_cmd *cmd;
1393 struct iscsi_task *ctask;
1394 struct iscsi_tm *tmf_hdr;
1395 s16 rval = 0;
1396 s16 tid = 0;
1397
1398 mtask = qedi_cmd->task;
1399 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1400 cls_sess = iscsi_conn_to_session(qedi_conn->cls_conn);
1401 set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1402
1403 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1404 if (!ctask || !ctask->sc) {
1405 QEDI_ERR(&qedi->dbg_ctx, "Task already completed\n");
1406 goto abort_ret;
1407 }
1408
1409 cmd = (struct qedi_cmd *)ctask->dd_data;
1410 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1411 "Abort tmf rtt=0x%x, cmd itt=0x%x, cmd tid=0x%x, cid=0x%x\n",
1412 get_itt(tmf_hdr->rtt), get_itt(ctask->itt), cmd->task_id,
1413 qedi_conn->iscsi_conn_id);
1414
1415 if (qedi_do_not_recover) {
1416 QEDI_ERR(&qedi->dbg_ctx, "DONT SEND CLEANUP/ABORT %d\n",
1417 qedi_do_not_recover);
1418 goto abort_ret;
1419 }
1420
1421 list_work = kzalloc(sizeof(*list_work), GFP_ATOMIC);
1422 if (!list_work) {
1423 QEDI_ERR(&qedi->dbg_ctx, "Memory allocation failed\n");
1424 goto abort_ret;
1425 }
1426
1427 qedi_cmd->type = TYPEIO;
1428 list_work->qedi_cmd = qedi_cmd;
1429 list_work->rtid = cmd->task_id;
1430 list_work->state = QEDI_WORK_SCHEDULED;
1431 qedi_cmd->list_tmf_work = list_work;
1432
1433 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
1434 "Queue tmf work=%p, list node=%p, cid=0x%x, tmf flags=0x%x\n",
1435 list_work->ptr_tmf_work, list_work, qedi_conn->iscsi_conn_id,
1436 tmf_hdr->flags);
1437
1438 spin_lock_bh(&qedi_conn->tmf_work_lock);
1439 list_add_tail(&list_work->list, &qedi_conn->tmf_work_list);
1440 spin_unlock_bh(&qedi_conn->tmf_work_lock);
1441
1442 qedi_iscsi_cleanup_task(ctask, false);
1443
1444 rval = qedi_wait_for_cleanup_request(qedi, qedi_conn, ctask, qedi_cmd,
1445 list_work);
1446 if (rval == -1) {
1447 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1448 "FW cleanup got escalated, cid=0x%x\n",
1449 qedi_conn->iscsi_conn_id);
1450 goto ldel_exit;
1451 }
1452
1453 tid = qedi_get_task_idx(qedi);
1454 if (tid == -1) {
1455 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1456 qedi_conn->iscsi_conn_id);
1457 goto ldel_exit;
1458 }
1459
1460 qedi_cmd->task_id = tid;
1461 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1462
1463 abort_ret:
1464 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1465 return;
1466
1467 ldel_exit:
1468 spin_lock_bh(&qedi_conn->tmf_work_lock);
1469 if (!qedi_cmd->list_tmf_work) {
1470 list_del_init(&list_work->list);
1471 qedi_cmd->list_tmf_work = NULL;
1472 kfree(list_work);
1473 }
1474 spin_unlock_bh(&qedi_conn->tmf_work_lock);
1475
1476 spin_lock(&qedi_conn->list_lock);
1477 if (likely(cmd->io_cmd_in_list)) {
1478 cmd->io_cmd_in_list = false;
1479 list_del_init(&cmd->io_cmd);
1480 qedi_conn->active_cmd_count--;
1481 }
1482 spin_unlock(&qedi_conn->list_lock);
1483
1484 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
1485 }
1486
qedi_send_iscsi_tmf(struct qedi_conn * qedi_conn,struct iscsi_task * mtask)1487 static int qedi_send_iscsi_tmf(struct qedi_conn *qedi_conn,
1488 struct iscsi_task *mtask)
1489 {
1490 struct iscsi_tmf_request_hdr tmf_pdu_header;
1491 struct iscsi_task_params task_params;
1492 struct qedi_ctx *qedi = qedi_conn->qedi;
1493 struct e4_iscsi_task_context *fw_task_ctx;
1494 struct iscsi_conn *conn = qedi_conn->cls_conn->dd_data;
1495 struct iscsi_task *ctask;
1496 struct iscsi_tm *tmf_hdr;
1497 struct qedi_cmd *qedi_cmd;
1498 struct qedi_cmd *cmd;
1499 struct qedi_endpoint *ep;
1500 u32 scsi_lun[2];
1501 s16 tid = 0;
1502 u16 sq_idx = 0;
1503 int rval = 0;
1504
1505 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1506 qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1507 ep = qedi_conn->ep;
1508 if (!ep)
1509 return -ENODEV;
1510
1511 tid = qedi_get_task_idx(qedi);
1512 if (tid == -1)
1513 return -ENOMEM;
1514
1515 fw_task_ctx =
1516 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1517 tid);
1518 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1519
1520 qedi_cmd->task_id = tid;
1521
1522 memset(&task_params, 0, sizeof(task_params));
1523 memset(&tmf_pdu_header, 0, sizeof(tmf_pdu_header));
1524
1525 /* Update header info */
1526 qedi_update_itt_map(qedi, tid, mtask->itt, qedi_cmd);
1527 tmf_pdu_header.itt = qedi_set_itt(tid, get_itt(mtask->itt));
1528 tmf_pdu_header.cmd_sn = be32_to_cpu(tmf_hdr->cmdsn);
1529
1530 memcpy(scsi_lun, &tmf_hdr->lun, sizeof(struct scsi_lun));
1531 tmf_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1532 tmf_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1533
1534 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1535 ISCSI_TM_FUNC_ABORT_TASK) {
1536 ctask = iscsi_itt_to_task(conn, tmf_hdr->rtt);
1537 if (!ctask || !ctask->sc) {
1538 QEDI_ERR(&qedi->dbg_ctx,
1539 "Could not get reference task\n");
1540 return 0;
1541 }
1542 cmd = (struct qedi_cmd *)ctask->dd_data;
1543 tmf_pdu_header.rtt =
1544 qedi_set_itt(cmd->task_id,
1545 get_itt(tmf_hdr->rtt));
1546 } else {
1547 tmf_pdu_header.rtt = ISCSI_RESERVED_TAG;
1548 }
1549
1550 tmf_pdu_header.opcode = tmf_hdr->opcode;
1551 tmf_pdu_header.function = tmf_hdr->flags;
1552 tmf_pdu_header.hdr_second_dword = ntoh24(tmf_hdr->dlength);
1553 tmf_pdu_header.ref_cmd_sn = be32_to_cpu(tmf_hdr->refcmdsn);
1554
1555 /* Fill fw input params */
1556 task_params.context = fw_task_ctx;
1557 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1558 task_params.itid = tid;
1559 task_params.cq_rss_number = 0;
1560 task_params.tx_io_size = 0;
1561 task_params.rx_io_size = 0;
1562
1563 sq_idx = qedi_get_wqe_idx(qedi_conn);
1564 task_params.sqe = &ep->sq[sq_idx];
1565
1566 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1567 rval = init_initiator_tmf_request_task(&task_params,
1568 &tmf_pdu_header);
1569 if (rval)
1570 return -1;
1571
1572 spin_lock(&qedi_conn->list_lock);
1573 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1574 qedi_cmd->io_cmd_in_list = true;
1575 qedi_conn->active_cmd_count++;
1576 spin_unlock(&qedi_conn->list_lock);
1577
1578 qedi_ring_doorbell(qedi_conn);
1579 return 0;
1580 }
1581
qedi_iscsi_abort_work(struct qedi_conn * qedi_conn,struct iscsi_task * mtask)1582 int qedi_iscsi_abort_work(struct qedi_conn *qedi_conn,
1583 struct iscsi_task *mtask)
1584 {
1585 struct qedi_ctx *qedi = qedi_conn->qedi;
1586 struct iscsi_tm *tmf_hdr;
1587 struct qedi_cmd *qedi_cmd = (struct qedi_cmd *)mtask->dd_data;
1588 s16 tid = 0;
1589
1590 tmf_hdr = (struct iscsi_tm *)mtask->hdr;
1591 qedi_cmd->task = mtask;
1592
1593 /* If abort task then schedule the work and return */
1594 if ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1595 ISCSI_TM_FUNC_ABORT_TASK) {
1596 qedi_cmd->state = CLEANUP_WAIT;
1597 INIT_WORK(&qedi_cmd->tmf_work, qedi_tmf_work);
1598 queue_work(qedi->tmf_thread, &qedi_cmd->tmf_work);
1599
1600 } else if (((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1601 ISCSI_TM_FUNC_LOGICAL_UNIT_RESET) ||
1602 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1603 ISCSI_TM_FUNC_TARGET_WARM_RESET) ||
1604 ((tmf_hdr->flags & ISCSI_FLAG_TM_FUNC_MASK) ==
1605 ISCSI_TM_FUNC_TARGET_COLD_RESET)) {
1606 tid = qedi_get_task_idx(qedi);
1607 if (tid == -1) {
1608 QEDI_ERR(&qedi->dbg_ctx, "Invalid tid, cid=0x%x\n",
1609 qedi_conn->iscsi_conn_id);
1610 return -1;
1611 }
1612 qedi_cmd->task_id = tid;
1613
1614 qedi_send_iscsi_tmf(qedi_conn, qedi_cmd->task);
1615
1616 } else {
1617 QEDI_ERR(&qedi->dbg_ctx, "Invalid tmf, cid=0x%x\n",
1618 qedi_conn->iscsi_conn_id);
1619 return -1;
1620 }
1621
1622 return 0;
1623 }
1624
qedi_send_iscsi_text(struct qedi_conn * qedi_conn,struct iscsi_task * task)1625 int qedi_send_iscsi_text(struct qedi_conn *qedi_conn,
1626 struct iscsi_task *task)
1627 {
1628 struct iscsi_text_request_hdr text_request_pdu_header;
1629 struct scsi_sgl_task_params tx_sgl_task_params;
1630 struct scsi_sgl_task_params rx_sgl_task_params;
1631 struct iscsi_task_params task_params;
1632 struct e4_iscsi_task_context *fw_task_ctx;
1633 struct qedi_ctx *qedi = qedi_conn->qedi;
1634 struct iscsi_text *text_hdr;
1635 struct scsi_sge *req_sge = NULL;
1636 struct scsi_sge *resp_sge = NULL;
1637 struct qedi_cmd *qedi_cmd;
1638 struct qedi_endpoint *ep;
1639 s16 tid = 0;
1640 u16 sq_idx = 0;
1641 int rval = 0;
1642
1643 req_sge = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1644 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1645 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1646 text_hdr = (struct iscsi_text *)task->hdr;
1647 ep = qedi_conn->ep;
1648
1649 tid = qedi_get_task_idx(qedi);
1650 if (tid == -1)
1651 return -ENOMEM;
1652
1653 fw_task_ctx =
1654 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1655 tid);
1656 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1657
1658 qedi_cmd->task_id = tid;
1659
1660 memset(&task_params, 0, sizeof(task_params));
1661 memset(&text_request_pdu_header, 0, sizeof(text_request_pdu_header));
1662 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1663 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1664
1665 /* Update header info */
1666 text_request_pdu_header.opcode = text_hdr->opcode;
1667 text_request_pdu_header.flags_attr = text_hdr->flags;
1668
1669 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1670 text_request_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1671 text_request_pdu_header.ttt = text_hdr->ttt;
1672 text_request_pdu_header.cmd_sn = be32_to_cpu(text_hdr->cmdsn);
1673 text_request_pdu_header.exp_stat_sn = be32_to_cpu(text_hdr->exp_statsn);
1674 text_request_pdu_header.hdr_second_dword = ntoh24(text_hdr->dlength);
1675
1676 /* Fill tx AHS and rx buffer */
1677 tx_sgl_task_params.sgl =
1678 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1679 tx_sgl_task_params.sgl_phys_addr.lo =
1680 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1681 tx_sgl_task_params.sgl_phys_addr.hi =
1682 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1683 tx_sgl_task_params.total_buffer_size = req_sge->sge_len;
1684 tx_sgl_task_params.num_sges = 1;
1685
1686 rx_sgl_task_params.sgl =
1687 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1688 rx_sgl_task_params.sgl_phys_addr.lo =
1689 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1690 rx_sgl_task_params.sgl_phys_addr.hi =
1691 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1692 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1693 rx_sgl_task_params.num_sges = 1;
1694
1695 /* Fill fw input params */
1696 task_params.context = fw_task_ctx;
1697 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1698 task_params.itid = tid;
1699 task_params.cq_rss_number = 0;
1700 task_params.tx_io_size = ntoh24(text_hdr->dlength);
1701 task_params.rx_io_size = resp_sge->sge_len;
1702
1703 sq_idx = qedi_get_wqe_idx(qedi_conn);
1704 task_params.sqe = &ep->sq[sq_idx];
1705
1706 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1707 rval = init_initiator_text_request_task(&task_params,
1708 &text_request_pdu_header,
1709 &tx_sgl_task_params,
1710 &rx_sgl_task_params);
1711 if (rval)
1712 return -1;
1713
1714 spin_lock(&qedi_conn->list_lock);
1715 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1716 qedi_cmd->io_cmd_in_list = true;
1717 qedi_conn->active_cmd_count++;
1718 spin_unlock(&qedi_conn->list_lock);
1719
1720 qedi_ring_doorbell(qedi_conn);
1721 return 0;
1722 }
1723
qedi_send_iscsi_nopout(struct qedi_conn * qedi_conn,struct iscsi_task * task,char * datap,int data_len,int unsol)1724 int qedi_send_iscsi_nopout(struct qedi_conn *qedi_conn,
1725 struct iscsi_task *task,
1726 char *datap, int data_len, int unsol)
1727 {
1728 struct iscsi_nop_out_hdr nop_out_pdu_header;
1729 struct scsi_sgl_task_params tx_sgl_task_params;
1730 struct scsi_sgl_task_params rx_sgl_task_params;
1731 struct iscsi_task_params task_params;
1732 struct qedi_ctx *qedi = qedi_conn->qedi;
1733 struct e4_iscsi_task_context *fw_task_ctx;
1734 struct iscsi_nopout *nopout_hdr;
1735 struct scsi_sge *resp_sge = NULL;
1736 struct qedi_cmd *qedi_cmd;
1737 struct qedi_endpoint *ep;
1738 u32 scsi_lun[2];
1739 s16 tid = 0;
1740 u16 sq_idx = 0;
1741 int rval = 0;
1742
1743 resp_sge = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1744 qedi_cmd = (struct qedi_cmd *)task->dd_data;
1745 nopout_hdr = (struct iscsi_nopout *)task->hdr;
1746 ep = qedi_conn->ep;
1747
1748 tid = qedi_get_task_idx(qedi);
1749 if (tid == -1)
1750 return -ENOMEM;
1751
1752 fw_task_ctx =
1753 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
1754 tid);
1755 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
1756
1757 qedi_cmd->task_id = tid;
1758
1759 memset(&task_params, 0, sizeof(task_params));
1760 memset(&nop_out_pdu_header, 0, sizeof(nop_out_pdu_header));
1761 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
1762 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
1763
1764 /* Update header info */
1765 nop_out_pdu_header.opcode = nopout_hdr->opcode;
1766 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_CONST1, 1);
1767 SET_FIELD(nop_out_pdu_header.flags_attr, ISCSI_NOP_OUT_HDR_RSRV, 0);
1768
1769 memcpy(scsi_lun, &nopout_hdr->lun, sizeof(struct scsi_lun));
1770 nop_out_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
1771 nop_out_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
1772 nop_out_pdu_header.cmd_sn = be32_to_cpu(nopout_hdr->cmdsn);
1773 nop_out_pdu_header.exp_stat_sn = be32_to_cpu(nopout_hdr->exp_statsn);
1774
1775 qedi_update_itt_map(qedi, tid, task->itt, qedi_cmd);
1776
1777 if (nopout_hdr->ttt != ISCSI_TTT_ALL_ONES) {
1778 nop_out_pdu_header.itt = be32_to_cpu(nopout_hdr->itt);
1779 nop_out_pdu_header.ttt = be32_to_cpu(nopout_hdr->ttt);
1780 } else {
1781 nop_out_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
1782 nop_out_pdu_header.ttt = ISCSI_TTT_ALL_ONES;
1783
1784 spin_lock(&qedi_conn->list_lock);
1785 list_add_tail(&qedi_cmd->io_cmd, &qedi_conn->active_cmd_list);
1786 qedi_cmd->io_cmd_in_list = true;
1787 qedi_conn->active_cmd_count++;
1788 spin_unlock(&qedi_conn->list_lock);
1789 }
1790
1791 /* Fill tx AHS and rx buffer */
1792 if (data_len) {
1793 tx_sgl_task_params.sgl =
1794 (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
1795 tx_sgl_task_params.sgl_phys_addr.lo =
1796 (u32)(qedi_conn->gen_pdu.req_dma_addr);
1797 tx_sgl_task_params.sgl_phys_addr.hi =
1798 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
1799 tx_sgl_task_params.total_buffer_size = data_len;
1800 tx_sgl_task_params.num_sges = 1;
1801
1802 rx_sgl_task_params.sgl =
1803 (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
1804 rx_sgl_task_params.sgl_phys_addr.lo =
1805 (u32)(qedi_conn->gen_pdu.resp_dma_addr);
1806 rx_sgl_task_params.sgl_phys_addr.hi =
1807 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
1808 rx_sgl_task_params.total_buffer_size = resp_sge->sge_len;
1809 rx_sgl_task_params.num_sges = 1;
1810 }
1811
1812 /* Fill fw input params */
1813 task_params.context = fw_task_ctx;
1814 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
1815 task_params.itid = tid;
1816 task_params.cq_rss_number = 0;
1817 task_params.tx_io_size = data_len;
1818 task_params.rx_io_size = resp_sge->sge_len;
1819
1820 sq_idx = qedi_get_wqe_idx(qedi_conn);
1821 task_params.sqe = &ep->sq[sq_idx];
1822
1823 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
1824 rval = init_initiator_nop_out_task(&task_params,
1825 &nop_out_pdu_header,
1826 &tx_sgl_task_params,
1827 &rx_sgl_task_params);
1828 if (rval)
1829 return -1;
1830
1831 qedi_ring_doorbell(qedi_conn);
1832 return 0;
1833 }
1834
qedi_split_bd(struct qedi_cmd * cmd,u64 addr,int sg_len,int bd_index)1835 static int qedi_split_bd(struct qedi_cmd *cmd, u64 addr, int sg_len,
1836 int bd_index)
1837 {
1838 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1839 int frag_size, sg_frags;
1840
1841 sg_frags = 0;
1842
1843 while (sg_len) {
1844 if (addr % QEDI_PAGE_SIZE)
1845 frag_size =
1846 (QEDI_PAGE_SIZE - (addr % QEDI_PAGE_SIZE));
1847 else
1848 frag_size = (sg_len > QEDI_BD_SPLIT_SZ) ? 0 :
1849 (sg_len % QEDI_BD_SPLIT_SZ);
1850
1851 if (frag_size == 0)
1852 frag_size = QEDI_BD_SPLIT_SZ;
1853
1854 bd[bd_index + sg_frags].sge_addr.lo = (addr & 0xffffffff);
1855 bd[bd_index + sg_frags].sge_addr.hi = (addr >> 32);
1856 bd[bd_index + sg_frags].sge_len = (u16)frag_size;
1857 QEDI_INFO(&cmd->conn->qedi->dbg_ctx, QEDI_LOG_IO,
1858 "split sge %d: addr=%llx, len=%x",
1859 (bd_index + sg_frags), addr, frag_size);
1860
1861 addr += (u64)frag_size;
1862 sg_frags++;
1863 sg_len -= frag_size;
1864 }
1865 return sg_frags;
1866 }
1867
qedi_map_scsi_sg(struct qedi_ctx * qedi,struct qedi_cmd * cmd)1868 static int qedi_map_scsi_sg(struct qedi_ctx *qedi, struct qedi_cmd *cmd)
1869 {
1870 struct scsi_cmnd *sc = cmd->scsi_cmd;
1871 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1872 struct scatterlist *sg;
1873 int byte_count = 0;
1874 int bd_count = 0;
1875 int sg_count;
1876 int sg_len;
1877 int sg_frags;
1878 u64 addr, end_addr;
1879 int i;
1880
1881 WARN_ON(scsi_sg_count(sc) > QEDI_ISCSI_MAX_BDS_PER_CMD);
1882
1883 sg_count = dma_map_sg(&qedi->pdev->dev, scsi_sglist(sc),
1884 scsi_sg_count(sc), sc->sc_data_direction);
1885
1886 /*
1887 * New condition to send single SGE as cached-SGL.
1888 * Single SGE with length less than 64K.
1889 */
1890 sg = scsi_sglist(sc);
1891 if ((sg_count == 1) && (sg_dma_len(sg) <= MAX_SGLEN_FOR_CACHESGL)) {
1892 sg_len = sg_dma_len(sg);
1893 addr = (u64)sg_dma_address(sg);
1894
1895 bd[bd_count].sge_addr.lo = (addr & 0xffffffff);
1896 bd[bd_count].sge_addr.hi = (addr >> 32);
1897 bd[bd_count].sge_len = (u16)sg_len;
1898
1899 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
1900 "single-cached-sgl: bd_count:%d addr=%llx, len=%x",
1901 sg_count, addr, sg_len);
1902
1903 return ++bd_count;
1904 }
1905
1906 scsi_for_each_sg(sc, sg, sg_count, i) {
1907 sg_len = sg_dma_len(sg);
1908 addr = (u64)sg_dma_address(sg);
1909 end_addr = (addr + sg_len);
1910
1911 /*
1912 * first sg elem in the 'list',
1913 * check if end addr is page-aligned.
1914 */
1915 if ((i == 0) && (sg_count > 1) && (end_addr % QEDI_PAGE_SIZE))
1916 cmd->use_slowpath = true;
1917
1918 /*
1919 * last sg elem in the 'list',
1920 * check if start addr is page-aligned.
1921 */
1922 else if ((i == (sg_count - 1)) &&
1923 (sg_count > 1) && (addr % QEDI_PAGE_SIZE))
1924 cmd->use_slowpath = true;
1925
1926 /*
1927 * middle sg elements in list,
1928 * check if start and end addr is page-aligned
1929 */
1930 else if ((i != 0) && (i != (sg_count - 1)) &&
1931 ((addr % QEDI_PAGE_SIZE) ||
1932 (end_addr % QEDI_PAGE_SIZE)))
1933 cmd->use_slowpath = true;
1934
1935 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "sg[%d] size=0x%x",
1936 i, sg_len);
1937
1938 if (sg_len > QEDI_BD_SPLIT_SZ) {
1939 sg_frags = qedi_split_bd(cmd, addr, sg_len, bd_count);
1940 } else {
1941 sg_frags = 1;
1942 bd[bd_count].sge_addr.lo = addr & 0xffffffff;
1943 bd[bd_count].sge_addr.hi = addr >> 32;
1944 bd[bd_count].sge_len = sg_len;
1945 }
1946 byte_count += sg_len;
1947 bd_count += sg_frags;
1948 }
1949
1950 if (byte_count != scsi_bufflen(sc))
1951 QEDI_ERR(&qedi->dbg_ctx,
1952 "byte_count = %d != scsi_bufflen = %d\n", byte_count,
1953 scsi_bufflen(sc));
1954 else
1955 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO, "byte_count = %d\n",
1956 byte_count);
1957
1958 WARN_ON(byte_count != scsi_bufflen(sc));
1959
1960 return bd_count;
1961 }
1962
qedi_iscsi_map_sg_list(struct qedi_cmd * cmd)1963 static void qedi_iscsi_map_sg_list(struct qedi_cmd *cmd)
1964 {
1965 int bd_count;
1966 struct scsi_cmnd *sc = cmd->scsi_cmd;
1967
1968 if (scsi_sg_count(sc)) {
1969 bd_count = qedi_map_scsi_sg(cmd->conn->qedi, cmd);
1970 if (bd_count == 0)
1971 return;
1972 } else {
1973 struct scsi_sge *bd = cmd->io_tbl.sge_tbl;
1974
1975 bd[0].sge_addr.lo = 0;
1976 bd[0].sge_addr.hi = 0;
1977 bd[0].sge_len = 0;
1978 bd_count = 0;
1979 }
1980 cmd->io_tbl.sge_valid = bd_count;
1981 }
1982
qedi_cpy_scsi_cdb(struct scsi_cmnd * sc,u32 * dstp)1983 static void qedi_cpy_scsi_cdb(struct scsi_cmnd *sc, u32 *dstp)
1984 {
1985 u32 dword;
1986 int lpcnt;
1987 u8 *srcp;
1988
1989 lpcnt = sc->cmd_len / sizeof(dword);
1990 srcp = (u8 *)sc->cmnd;
1991 while (lpcnt--) {
1992 memcpy(&dword, (const void *)srcp, 4);
1993 *dstp = cpu_to_be32(dword);
1994 srcp += 4;
1995 dstp++;
1996 }
1997 if (sc->cmd_len & 0x3) {
1998 dword = (u32)srcp[0] | ((u32)srcp[1] << 8);
1999 *dstp = cpu_to_be32(dword);
2000 }
2001 }
2002
qedi_trace_io(struct qedi_ctx * qedi,struct iscsi_task * task,u16 tid,int8_t direction)2003 void qedi_trace_io(struct qedi_ctx *qedi, struct iscsi_task *task,
2004 u16 tid, int8_t direction)
2005 {
2006 struct qedi_io_log *io_log;
2007 struct iscsi_conn *conn = task->conn;
2008 struct qedi_conn *qedi_conn = conn->dd_data;
2009 struct scsi_cmnd *sc_cmd = task->sc;
2010 unsigned long flags;
2011
2012 spin_lock_irqsave(&qedi->io_trace_lock, flags);
2013
2014 io_log = &qedi->io_trace_buf[qedi->io_trace_idx];
2015 io_log->direction = direction;
2016 io_log->task_id = tid;
2017 io_log->cid = qedi_conn->iscsi_conn_id;
2018 io_log->lun = sc_cmd->device->lun;
2019 io_log->op = sc_cmd->cmnd[0];
2020 io_log->lba[0] = sc_cmd->cmnd[2];
2021 io_log->lba[1] = sc_cmd->cmnd[3];
2022 io_log->lba[2] = sc_cmd->cmnd[4];
2023 io_log->lba[3] = sc_cmd->cmnd[5];
2024 io_log->bufflen = scsi_bufflen(sc_cmd);
2025 io_log->sg_count = scsi_sg_count(sc_cmd);
2026 io_log->fast_sgs = qedi->fast_sgls;
2027 io_log->cached_sgs = qedi->cached_sgls;
2028 io_log->slow_sgs = qedi->slow_sgls;
2029 io_log->cached_sge = qedi->use_cached_sge;
2030 io_log->slow_sge = qedi->use_slow_sge;
2031 io_log->fast_sge = qedi->use_fast_sge;
2032 io_log->result = sc_cmd->result;
2033 io_log->jiffies = jiffies;
2034 io_log->blk_req_cpu = smp_processor_id();
2035
2036 if (direction == QEDI_IO_TRACE_REQ) {
2037 /* For requests we only care about the submission CPU */
2038 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2039 io_log->intr_cpu = 0;
2040 io_log->blk_rsp_cpu = 0;
2041 } else if (direction == QEDI_IO_TRACE_RSP) {
2042 io_log->req_cpu = smp_processor_id() % qedi->num_queues;
2043 io_log->intr_cpu = qedi->intr_cpu;
2044 io_log->blk_rsp_cpu = smp_processor_id();
2045 }
2046
2047 qedi->io_trace_idx++;
2048 if (qedi->io_trace_idx == QEDI_IO_TRACE_SIZE)
2049 qedi->io_trace_idx = 0;
2050
2051 qedi->use_cached_sge = false;
2052 qedi->use_slow_sge = false;
2053 qedi->use_fast_sge = false;
2054
2055 spin_unlock_irqrestore(&qedi->io_trace_lock, flags);
2056 }
2057
qedi_iscsi_send_ioreq(struct iscsi_task * task)2058 int qedi_iscsi_send_ioreq(struct iscsi_task *task)
2059 {
2060 struct iscsi_conn *conn = task->conn;
2061 struct iscsi_session *session = conn->session;
2062 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
2063 struct qedi_ctx *qedi = iscsi_host_priv(shost);
2064 struct qedi_conn *qedi_conn = conn->dd_data;
2065 struct qedi_cmd *cmd = task->dd_data;
2066 struct scsi_cmnd *sc = task->sc;
2067 struct iscsi_cmd_hdr cmd_pdu_header;
2068 struct scsi_sgl_task_params tx_sgl_task_params;
2069 struct scsi_sgl_task_params rx_sgl_task_params;
2070 struct scsi_sgl_task_params *prx_sgl = NULL;
2071 struct scsi_sgl_task_params *ptx_sgl = NULL;
2072 struct iscsi_task_params task_params;
2073 struct iscsi_conn_params conn_params;
2074 struct scsi_initiator_cmd_params cmd_params;
2075 struct e4_iscsi_task_context *fw_task_ctx;
2076 struct iscsi_cls_conn *cls_conn;
2077 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
2078 enum iscsi_task_type task_type = MAX_ISCSI_TASK_TYPE;
2079 struct qedi_endpoint *ep;
2080 u32 scsi_lun[2];
2081 s16 tid = 0;
2082 u16 sq_idx = 0;
2083 u16 cq_idx;
2084 int rval = 0;
2085
2086 ep = qedi_conn->ep;
2087 cls_conn = qedi_conn->cls_conn;
2088 conn = cls_conn->dd_data;
2089
2090 qedi_iscsi_map_sg_list(cmd);
2091 int_to_scsilun(sc->device->lun, (struct scsi_lun *)scsi_lun);
2092
2093 tid = qedi_get_task_idx(qedi);
2094 if (tid == -1)
2095 return -ENOMEM;
2096
2097 fw_task_ctx =
2098 (struct e4_iscsi_task_context *)qedi_get_task_mem(&qedi->tasks,
2099 tid);
2100 memset(fw_task_ctx, 0, sizeof(struct e4_iscsi_task_context));
2101
2102 cmd->task_id = tid;
2103
2104 memset(&task_params, 0, sizeof(task_params));
2105 memset(&cmd_pdu_header, 0, sizeof(cmd_pdu_header));
2106 memset(&tx_sgl_task_params, 0, sizeof(tx_sgl_task_params));
2107 memset(&rx_sgl_task_params, 0, sizeof(rx_sgl_task_params));
2108 memset(&conn_params, 0, sizeof(conn_params));
2109 memset(&cmd_params, 0, sizeof(cmd_params));
2110
2111 cq_idx = smp_processor_id() % qedi->num_queues;
2112 /* Update header info */
2113 SET_FIELD(cmd_pdu_header.flags_attr, ISCSI_CMD_HDR_ATTR,
2114 ISCSI_ATTR_SIMPLE);
2115 if (hdr->cdb[0] != TEST_UNIT_READY) {
2116 if (sc->sc_data_direction == DMA_TO_DEVICE) {
2117 SET_FIELD(cmd_pdu_header.flags_attr,
2118 ISCSI_CMD_HDR_WRITE, 1);
2119 task_type = ISCSI_TASK_TYPE_INITIATOR_WRITE;
2120 } else {
2121 SET_FIELD(cmd_pdu_header.flags_attr,
2122 ISCSI_CMD_HDR_READ, 1);
2123 task_type = ISCSI_TASK_TYPE_INITIATOR_READ;
2124 }
2125 }
2126
2127 cmd_pdu_header.lun.lo = be32_to_cpu(scsi_lun[0]);
2128 cmd_pdu_header.lun.hi = be32_to_cpu(scsi_lun[1]);
2129
2130 qedi_update_itt_map(qedi, tid, task->itt, cmd);
2131 cmd_pdu_header.itt = qedi_set_itt(tid, get_itt(task->itt));
2132 cmd_pdu_header.expected_transfer_length = cpu_to_be32(hdr->data_length);
2133 cmd_pdu_header.hdr_second_dword = ntoh24(hdr->dlength);
2134 cmd_pdu_header.cmd_sn = be32_to_cpu(hdr->cmdsn);
2135 cmd_pdu_header.hdr_first_byte = hdr->opcode;
2136 qedi_cpy_scsi_cdb(sc, (u32 *)cmd_pdu_header.cdb);
2137
2138 /* Fill tx AHS and rx buffer */
2139 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) {
2140 tx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2141 tx_sgl_task_params.sgl_phys_addr.lo =
2142 (u32)(cmd->io_tbl.sge_tbl_dma);
2143 tx_sgl_task_params.sgl_phys_addr.hi =
2144 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2145 tx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2146 tx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2147 if (cmd->use_slowpath)
2148 tx_sgl_task_params.small_mid_sge = true;
2149 } else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ) {
2150 rx_sgl_task_params.sgl = cmd->io_tbl.sge_tbl;
2151 rx_sgl_task_params.sgl_phys_addr.lo =
2152 (u32)(cmd->io_tbl.sge_tbl_dma);
2153 rx_sgl_task_params.sgl_phys_addr.hi =
2154 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32);
2155 rx_sgl_task_params.total_buffer_size = scsi_bufflen(sc);
2156 rx_sgl_task_params.num_sges = cmd->io_tbl.sge_valid;
2157 }
2158
2159 /* Add conn param */
2160 conn_params.first_burst_length = conn->session->first_burst;
2161 conn_params.max_send_pdu_length = conn->max_xmit_dlength;
2162 conn_params.max_burst_length = conn->session->max_burst;
2163 if (conn->session->initial_r2t_en)
2164 conn_params.initial_r2t = true;
2165 if (conn->session->imm_data_en)
2166 conn_params.immediate_data = true;
2167
2168 /* Add cmd params */
2169 cmd_params.sense_data_buffer_phys_addr.lo = (u32)cmd->sense_buffer_dma;
2170 cmd_params.sense_data_buffer_phys_addr.hi =
2171 (u32)((u64)cmd->sense_buffer_dma >> 32);
2172 /* Fill fw input params */
2173 task_params.context = fw_task_ctx;
2174 task_params.conn_icid = (u16)qedi_conn->iscsi_conn_id;
2175 task_params.itid = tid;
2176 task_params.cq_rss_number = cq_idx;
2177 if (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE)
2178 task_params.tx_io_size = scsi_bufflen(sc);
2179 else if (task_type == ISCSI_TASK_TYPE_INITIATOR_READ)
2180 task_params.rx_io_size = scsi_bufflen(sc);
2181
2182 sq_idx = qedi_get_wqe_idx(qedi_conn);
2183 task_params.sqe = &ep->sq[sq_idx];
2184
2185 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_IO,
2186 "%s: %s-SGL: sg_len=0x%x num_sges=0x%x first-sge-lo=0x%x first-sge-hi=0x%x\n",
2187 (task_type == ISCSI_TASK_TYPE_INITIATOR_WRITE) ?
2188 "Write " : "Read ", (cmd->io_tbl.sge_valid == 1) ?
2189 "Single" : (cmd->use_slowpath ? "SLOW" : "FAST"),
2190 (u16)cmd->io_tbl.sge_valid, scsi_bufflen(sc),
2191 (u32)(cmd->io_tbl.sge_tbl_dma),
2192 (u32)((u64)cmd->io_tbl.sge_tbl_dma >> 32));
2193
2194 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2195
2196 if (task_params.tx_io_size != 0)
2197 ptx_sgl = &tx_sgl_task_params;
2198 if (task_params.rx_io_size != 0)
2199 prx_sgl = &rx_sgl_task_params;
2200
2201 rval = init_initiator_rw_iscsi_task(&task_params, &conn_params,
2202 &cmd_params, &cmd_pdu_header,
2203 ptx_sgl, prx_sgl,
2204 NULL);
2205 if (rval)
2206 return -1;
2207
2208 spin_lock(&qedi_conn->list_lock);
2209 list_add_tail(&cmd->io_cmd, &qedi_conn->active_cmd_list);
2210 cmd->io_cmd_in_list = true;
2211 qedi_conn->active_cmd_count++;
2212 spin_unlock(&qedi_conn->list_lock);
2213
2214 qedi_ring_doorbell(qedi_conn);
2215 return 0;
2216 }
2217
qedi_iscsi_cleanup_task(struct iscsi_task * task,bool mark_cmd_node_deleted)2218 int qedi_iscsi_cleanup_task(struct iscsi_task *task, bool mark_cmd_node_deleted)
2219 {
2220 struct iscsi_task_params task_params;
2221 struct qedi_endpoint *ep;
2222 struct iscsi_conn *conn = task->conn;
2223 struct qedi_conn *qedi_conn = conn->dd_data;
2224 struct qedi_cmd *cmd = task->dd_data;
2225 u16 sq_idx = 0;
2226 int rval = 0;
2227
2228 QEDI_INFO(&qedi_conn->qedi->dbg_ctx, QEDI_LOG_SCSI_TM,
2229 "issue cleanup tid=0x%x itt=0x%x task_state=%d cmd_state=0%x cid=0x%x\n",
2230 cmd->task_id, get_itt(task->itt), task->state,
2231 cmd->state, qedi_conn->iscsi_conn_id);
2232
2233 memset(&task_params, 0, sizeof(task_params));
2234 ep = qedi_conn->ep;
2235
2236 sq_idx = qedi_get_wqe_idx(qedi_conn);
2237
2238 task_params.sqe = &ep->sq[sq_idx];
2239 memset(task_params.sqe, 0, sizeof(struct iscsi_wqe));
2240 task_params.itid = cmd->task_id;
2241
2242 rval = init_cleanup_task(&task_params);
2243 if (rval)
2244 return rval;
2245
2246 qedi_ring_doorbell(qedi_conn);
2247 return 0;
2248 }
2249