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