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 <linux/etherdevice.h>
9 #include <linux/if_ether.h>
10 #include <linux/if_vlan.h>
11 #include <scsi/scsi_tcq.h>
12
13 #include "qedi.h"
14 #include "qedi_iscsi.h"
15 #include "qedi_gbl.h"
16
qedi_recover_all_conns(struct qedi_ctx * qedi)17 int qedi_recover_all_conns(struct qedi_ctx *qedi)
18 {
19 struct qedi_conn *qedi_conn;
20 int i;
21
22 for (i = 0; i < qedi->max_active_conns; i++) {
23 qedi_conn = qedi_get_conn_from_id(qedi, i);
24 if (!qedi_conn)
25 continue;
26
27 qedi_start_conn_recovery(qedi, qedi_conn);
28 }
29
30 return SUCCESS;
31 }
32
qedi_eh_host_reset(struct scsi_cmnd * cmd)33 static int qedi_eh_host_reset(struct scsi_cmnd *cmd)
34 {
35 struct Scsi_Host *shost = cmd->device->host;
36 struct qedi_ctx *qedi;
37
38 qedi = iscsi_host_priv(shost);
39
40 return qedi_recover_all_conns(qedi);
41 }
42
43 struct scsi_host_template qedi_host_template = {
44 .module = THIS_MODULE,
45 .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver",
46 .proc_name = QEDI_MODULE_NAME,
47 .queuecommand = iscsi_queuecommand,
48 .eh_timed_out = iscsi_eh_cmd_timed_out,
49 .eh_abort_handler = iscsi_eh_abort,
50 .eh_device_reset_handler = iscsi_eh_device_reset,
51 .eh_target_reset_handler = iscsi_eh_recover_target,
52 .eh_host_reset_handler = qedi_eh_host_reset,
53 .target_alloc = iscsi_target_alloc,
54 .change_queue_depth = scsi_change_queue_depth,
55 .can_queue = QEDI_MAX_ISCSI_TASK,
56 .this_id = -1,
57 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD,
58 .max_sectors = 0xffff,
59 .dma_boundary = QEDI_HW_DMA_BOUNDARY,
60 .cmd_per_lun = 128,
61 .shost_attrs = qedi_shost_attrs,
62 };
63
qedi_conn_free_login_resources(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn)64 static void qedi_conn_free_login_resources(struct qedi_ctx *qedi,
65 struct qedi_conn *qedi_conn)
66 {
67 if (qedi_conn->gen_pdu.resp_bd_tbl) {
68 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
69 qedi_conn->gen_pdu.resp_bd_tbl,
70 qedi_conn->gen_pdu.resp_bd_dma);
71 qedi_conn->gen_pdu.resp_bd_tbl = NULL;
72 }
73
74 if (qedi_conn->gen_pdu.req_bd_tbl) {
75 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
76 qedi_conn->gen_pdu.req_bd_tbl,
77 qedi_conn->gen_pdu.req_bd_dma);
78 qedi_conn->gen_pdu.req_bd_tbl = NULL;
79 }
80
81 if (qedi_conn->gen_pdu.resp_buf) {
82 dma_free_coherent(&qedi->pdev->dev,
83 ISCSI_DEF_MAX_RECV_SEG_LEN,
84 qedi_conn->gen_pdu.resp_buf,
85 qedi_conn->gen_pdu.resp_dma_addr);
86 qedi_conn->gen_pdu.resp_buf = NULL;
87 }
88
89 if (qedi_conn->gen_pdu.req_buf) {
90 dma_free_coherent(&qedi->pdev->dev,
91 ISCSI_DEF_MAX_RECV_SEG_LEN,
92 qedi_conn->gen_pdu.req_buf,
93 qedi_conn->gen_pdu.req_dma_addr);
94 qedi_conn->gen_pdu.req_buf = NULL;
95 }
96 }
97
qedi_conn_alloc_login_resources(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn)98 static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi,
99 struct qedi_conn *qedi_conn)
100 {
101 qedi_conn->gen_pdu.req_buf =
102 dma_alloc_coherent(&qedi->pdev->dev,
103 ISCSI_DEF_MAX_RECV_SEG_LEN,
104 &qedi_conn->gen_pdu.req_dma_addr,
105 GFP_KERNEL);
106 if (!qedi_conn->gen_pdu.req_buf)
107 goto login_req_buf_failure;
108
109 qedi_conn->gen_pdu.req_buf_size = 0;
110 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf;
111
112 qedi_conn->gen_pdu.resp_buf =
113 dma_alloc_coherent(&qedi->pdev->dev,
114 ISCSI_DEF_MAX_RECV_SEG_LEN,
115 &qedi_conn->gen_pdu.resp_dma_addr,
116 GFP_KERNEL);
117 if (!qedi_conn->gen_pdu.resp_buf)
118 goto login_resp_buf_failure;
119
120 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
121 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf;
122
123 qedi_conn->gen_pdu.req_bd_tbl =
124 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
125 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
126 if (!qedi_conn->gen_pdu.req_bd_tbl)
127 goto login_req_bd_tbl_failure;
128
129 qedi_conn->gen_pdu.resp_bd_tbl =
130 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
131 &qedi_conn->gen_pdu.resp_bd_dma,
132 GFP_KERNEL);
133 if (!qedi_conn->gen_pdu.resp_bd_tbl)
134 goto login_resp_bd_tbl_failure;
135
136 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS,
137 "Allocation successful, cid=0x%x\n",
138 qedi_conn->iscsi_conn_id);
139 return 0;
140
141 login_resp_bd_tbl_failure:
142 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
143 qedi_conn->gen_pdu.req_bd_tbl,
144 qedi_conn->gen_pdu.req_bd_dma);
145 qedi_conn->gen_pdu.req_bd_tbl = NULL;
146
147 login_req_bd_tbl_failure:
148 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
149 qedi_conn->gen_pdu.resp_buf,
150 qedi_conn->gen_pdu.resp_dma_addr);
151 qedi_conn->gen_pdu.resp_buf = NULL;
152 login_resp_buf_failure:
153 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
154 qedi_conn->gen_pdu.req_buf,
155 qedi_conn->gen_pdu.req_dma_addr);
156 qedi_conn->gen_pdu.req_buf = NULL;
157 login_req_buf_failure:
158 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data,
159 "login resource alloc failed!!\n");
160 return -ENOMEM;
161 }
162
qedi_destroy_cmd_pool(struct qedi_ctx * qedi,struct iscsi_session * session)163 static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi,
164 struct iscsi_session *session)
165 {
166 int i;
167
168 for (i = 0; i < session->cmds_max; i++) {
169 struct iscsi_task *task = session->cmds[i];
170 struct qedi_cmd *cmd = task->dd_data;
171
172 if (cmd->io_tbl.sge_tbl)
173 dma_free_coherent(&qedi->pdev->dev,
174 QEDI_ISCSI_MAX_BDS_PER_CMD *
175 sizeof(struct scsi_sge),
176 cmd->io_tbl.sge_tbl,
177 cmd->io_tbl.sge_tbl_dma);
178
179 if (cmd->sense_buffer)
180 dma_free_coherent(&qedi->pdev->dev,
181 SCSI_SENSE_BUFFERSIZE,
182 cmd->sense_buffer,
183 cmd->sense_buffer_dma);
184 }
185 }
186
qedi_alloc_sget(struct qedi_ctx * qedi,struct iscsi_session * session,struct qedi_cmd * cmd)187 static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session,
188 struct qedi_cmd *cmd)
189 {
190 struct qedi_io_bdt *io = &cmd->io_tbl;
191 struct scsi_sge *sge;
192
193 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev,
194 QEDI_ISCSI_MAX_BDS_PER_CMD *
195 sizeof(*sge),
196 &io->sge_tbl_dma, GFP_KERNEL);
197 if (!io->sge_tbl) {
198 iscsi_session_printk(KERN_ERR, session,
199 "Could not allocate BD table.\n");
200 return -ENOMEM;
201 }
202
203 io->sge_valid = 0;
204 return 0;
205 }
206
qedi_setup_cmd_pool(struct qedi_ctx * qedi,struct iscsi_session * session)207 static int qedi_setup_cmd_pool(struct qedi_ctx *qedi,
208 struct iscsi_session *session)
209 {
210 int i;
211
212 for (i = 0; i < session->cmds_max; i++) {
213 struct iscsi_task *task = session->cmds[i];
214 struct qedi_cmd *cmd = task->dd_data;
215
216 task->hdr = &cmd->hdr;
217 task->hdr_max = sizeof(struct iscsi_hdr);
218
219 if (qedi_alloc_sget(qedi, session, cmd))
220 goto free_sgets;
221
222 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev,
223 SCSI_SENSE_BUFFERSIZE,
224 &cmd->sense_buffer_dma,
225 GFP_KERNEL);
226 if (!cmd->sense_buffer)
227 goto free_sgets;
228 }
229
230 return 0;
231
232 free_sgets:
233 qedi_destroy_cmd_pool(qedi, session);
234 return -ENOMEM;
235 }
236
237 static struct iscsi_cls_session *
qedi_session_create(struct iscsi_endpoint * ep,u16 cmds_max,u16 qdepth,uint32_t initial_cmdsn)238 qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max,
239 u16 qdepth, uint32_t initial_cmdsn)
240 {
241 struct Scsi_Host *shost;
242 struct iscsi_cls_session *cls_session;
243 struct qedi_ctx *qedi;
244 struct qedi_endpoint *qedi_ep;
245
246 if (!ep)
247 return NULL;
248
249 qedi_ep = ep->dd_data;
250 shost = qedi_ep->qedi->shost;
251 qedi = iscsi_host_priv(shost);
252
253 if (cmds_max > qedi->max_sqes)
254 cmds_max = qedi->max_sqes;
255 else if (cmds_max < QEDI_SQ_WQES_MIN)
256 cmds_max = QEDI_SQ_WQES_MIN;
257
258 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost,
259 cmds_max, 0, sizeof(struct qedi_cmd),
260 initial_cmdsn, ISCSI_MAX_TARGET);
261 if (!cls_session) {
262 QEDI_ERR(&qedi->dbg_ctx,
263 "Failed to setup session for ep=%p\n", qedi_ep);
264 return NULL;
265 }
266
267 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) {
268 QEDI_ERR(&qedi->dbg_ctx,
269 "Failed to setup cmd pool for ep=%p\n", qedi_ep);
270 goto session_teardown;
271 }
272
273 return cls_session;
274
275 session_teardown:
276 iscsi_session_teardown(cls_session);
277 return NULL;
278 }
279
qedi_session_destroy(struct iscsi_cls_session * cls_session)280 static void qedi_session_destroy(struct iscsi_cls_session *cls_session)
281 {
282 struct iscsi_session *session = cls_session->dd_data;
283 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
284 struct qedi_ctx *qedi = iscsi_host_priv(shost);
285
286 qedi_destroy_cmd_pool(qedi, session);
287 iscsi_session_teardown(cls_session);
288 }
289
290 static struct iscsi_cls_conn *
qedi_conn_create(struct iscsi_cls_session * cls_session,uint32_t cid)291 qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
292 {
293 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
294 struct qedi_ctx *qedi = iscsi_host_priv(shost);
295 struct iscsi_cls_conn *cls_conn;
296 struct qedi_conn *qedi_conn;
297 struct iscsi_conn *conn;
298
299 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn),
300 cid);
301 if (!cls_conn) {
302 QEDI_ERR(&qedi->dbg_ctx,
303 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n",
304 cid, cls_session);
305 return NULL;
306 }
307
308 conn = cls_conn->dd_data;
309 qedi_conn = conn->dd_data;
310 qedi_conn->cls_conn = cls_conn;
311 qedi_conn->qedi = qedi;
312 qedi_conn->ep = NULL;
313 qedi_conn->active_cmd_count = 0;
314 INIT_LIST_HEAD(&qedi_conn->active_cmd_list);
315 spin_lock_init(&qedi_conn->list_lock);
316
317 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) {
318 iscsi_conn_printk(KERN_ALERT, conn,
319 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n",
320 cid, cls_session);
321 goto free_conn;
322 }
323
324 return cls_conn;
325
326 free_conn:
327 iscsi_conn_teardown(cls_conn);
328 return NULL;
329 }
330
qedi_mark_device_missing(struct iscsi_cls_session * cls_session)331 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
332 {
333 struct iscsi_session *session = cls_session->dd_data;
334 struct qedi_conn *qedi_conn = session->leadconn->dd_data;
335
336 spin_lock_bh(&session->frwd_lock);
337 set_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags);
338 spin_unlock_bh(&session->frwd_lock);
339 }
340
qedi_mark_device_available(struct iscsi_cls_session * cls_session)341 void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
342 {
343 struct iscsi_session *session = cls_session->dd_data;
344 struct qedi_conn *qedi_conn = session->leadconn->dd_data;
345
346 spin_lock_bh(&session->frwd_lock);
347 clear_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags);
348 spin_unlock_bh(&session->frwd_lock);
349 }
350
qedi_bind_conn_to_iscsi_cid(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn)351 static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi,
352 struct qedi_conn *qedi_conn)
353 {
354 u32 iscsi_cid = qedi_conn->iscsi_conn_id;
355
356 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) {
357 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
358 "conn bind - entry #%d not free\n",
359 iscsi_cid);
360 return -EBUSY;
361 }
362
363 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn;
364 return 0;
365 }
366
qedi_get_conn_from_id(struct qedi_ctx * qedi,u32 iscsi_cid)367 struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid)
368 {
369 if (!qedi->cid_que.conn_cid_tbl) {
370 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n");
371 return NULL;
372
373 } else if (iscsi_cid >= qedi->max_active_conns) {
374 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid);
375 return NULL;
376 }
377 return qedi->cid_que.conn_cid_tbl[iscsi_cid];
378 }
379
qedi_conn_bind(struct iscsi_cls_session * cls_session,struct iscsi_cls_conn * cls_conn,u64 transport_fd,int is_leading)380 static int qedi_conn_bind(struct iscsi_cls_session *cls_session,
381 struct iscsi_cls_conn *cls_conn,
382 u64 transport_fd, int is_leading)
383 {
384 struct iscsi_conn *conn = cls_conn->dd_data;
385 struct qedi_conn *qedi_conn = conn->dd_data;
386 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
387 struct qedi_ctx *qedi = iscsi_host_priv(shost);
388 struct qedi_endpoint *qedi_ep;
389 struct iscsi_endpoint *ep;
390 int rc = 0;
391
392 ep = iscsi_lookup_endpoint(transport_fd);
393 if (!ep)
394 return -EINVAL;
395
396 qedi_ep = ep->dd_data;
397 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) ||
398 (qedi_ep->state == EP_STATE_TCP_RST_RCVD)) {
399 rc = -EINVAL;
400 goto put_ep;
401 }
402
403 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) {
404 rc = -EINVAL;
405 goto put_ep;
406 }
407
408
409 qedi_ep->conn = qedi_conn;
410 qedi_conn->ep = qedi_ep;
411 qedi_conn->iscsi_ep = ep;
412 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
413 qedi_conn->fw_cid = qedi_ep->fw_cid;
414 qedi_conn->cmd_cleanup_req = 0;
415 qedi_conn->cmd_cleanup_cmpl = 0;
416
417 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn)) {
418 rc = -EINVAL;
419 goto put_ep;
420 }
421
422
423 spin_lock_init(&qedi_conn->tmf_work_lock);
424 INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
425 init_waitqueue_head(&qedi_conn->wait_queue);
426 put_ep:
427 iscsi_put_endpoint(ep);
428 return rc;
429 }
430
qedi_iscsi_update_conn(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn)431 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
432 struct qedi_conn *qedi_conn)
433 {
434 struct qed_iscsi_params_update *conn_info;
435 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
436 struct iscsi_conn *conn = cls_conn->dd_data;
437 struct qedi_endpoint *qedi_ep;
438 int rval;
439
440 qedi_ep = qedi_conn->ep;
441
442 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
443 if (!conn_info) {
444 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
445 return -ENOMEM;
446 }
447
448 conn_info->update_flag = 0;
449
450 if (conn->hdrdgst_en)
451 SET_FIELD(conn_info->update_flag,
452 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
453 if (conn->datadgst_en)
454 SET_FIELD(conn_info->update_flag,
455 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
456 if (conn->session->initial_r2t_en)
457 SET_FIELD(conn_info->update_flag,
458 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
459 true);
460 if (conn->session->imm_data_en)
461 SET_FIELD(conn_info->update_flag,
462 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
463 true);
464
465 conn_info->max_seq_size = conn->session->max_burst;
466 conn_info->max_recv_pdu_length = conn->max_recv_dlength;
467 conn_info->max_send_pdu_length = conn->max_xmit_dlength;
468 conn_info->first_seq_length = conn->session->first_burst;
469 conn_info->exp_stat_sn = conn->exp_statsn;
470
471 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
472 conn_info);
473 if (rval) {
474 rval = -ENXIO;
475 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
476 }
477
478 kfree(conn_info);
479 return rval;
480 }
481
qedi_calc_mss(u16 pmtu,u8 is_ipv6,u8 tcp_ts_en,u8 vlan_en)482 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
483 {
484 u16 mss = 0;
485 u16 hdrs = TCP_HDR_LEN;
486
487 if (is_ipv6)
488 hdrs += IPV6_HDR_LEN;
489 else
490 hdrs += IPV4_HDR_LEN;
491
492 mss = pmtu - hdrs;
493
494 if (!mss)
495 mss = DEF_MSS;
496
497 return mss;
498 }
499
qedi_iscsi_offload_conn(struct qedi_endpoint * qedi_ep)500 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
501 {
502 struct qed_iscsi_params_offload *conn_info;
503 struct qedi_ctx *qedi = qedi_ep->qedi;
504 int rval;
505 int i;
506
507 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
508 if (!conn_info) {
509 QEDI_ERR(&qedi->dbg_ctx,
510 "Failed to allocate memory ep=%p\n", qedi_ep);
511 return -ENOMEM;
512 }
513
514 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
515 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
516
517 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
518 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
519
520 if (qedi_ep->ip_type == TCP_IPV4) {
521 conn_info->ip_version = 0;
522 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
523 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
524 qedi_ep->src_addr, qedi_ep->dst_addr);
525 } else {
526 for (i = 1; i < 4; i++) {
527 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
528 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
529 }
530
531 conn_info->ip_version = 1;
532 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
533 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
534 qedi_ep->src_addr, qedi_ep->dst_addr);
535 }
536
537 conn_info->src.port = qedi_ep->src_port;
538 conn_info->dst.port = qedi_ep->dst_port;
539
540 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
541 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
542 conn_info->vlan_id = qedi_ep->vlan_id;
543
544 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
545 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
546 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
547 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
548
549 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues);
550
551 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
552 conn_info->dup_ack_theshold = 3;
553 conn_info->rcv_wnd = 65535;
554
555 conn_info->ss_thresh = 65535;
556 conn_info->srtt = 300;
557 conn_info->rtt_var = 150;
558 conn_info->flow_label = 0;
559 conn_info->ka_timeout = DEF_KA_TIMEOUT;
560 conn_info->ka_interval = DEF_KA_INTERVAL;
561 conn_info->max_rt_time = DEF_MAX_RT_TIME;
562 conn_info->ttl = DEF_TTL;
563 conn_info->tos_or_tc = DEF_TOS;
564 conn_info->remote_port = qedi_ep->dst_port;
565 conn_info->local_port = qedi_ep->src_port;
566
567 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
568 (qedi_ep->ip_type == TCP_IPV6),
569 1, (qedi_ep->vlan_id != 0));
570
571 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss;
572 conn_info->rcv_wnd_scale = 4;
573 conn_info->da_timeout_value = 200;
574 conn_info->ack_frequency = 2;
575
576 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
577 "Default cq index [%d], mss [%d]\n",
578 conn_info->default_cq, conn_info->mss);
579
580 /* Prepare the doorbell parameters */
581 qedi_ep->db_data.agg_flags = 0;
582 qedi_ep->db_data.params = 0;
583 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_DEST, DB_DEST_XCM);
584 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_AGG_CMD,
585 DB_AGG_CMD_MAX);
586 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_AGG_VAL_SEL,
587 DQ_XCM_ISCSI_SQ_PROD_CMD);
588 SET_FIELD(qedi_ep->db_data.params, ISCSI_DB_DATA_BYPASS_EN, 1);
589
590 /* Register doorbell with doorbell recovery mechanism */
591 rval = qedi_ops->common->db_recovery_add(qedi->cdev,
592 qedi_ep->p_doorbell,
593 &qedi_ep->db_data,
594 DB_REC_WIDTH_32B,
595 DB_REC_KERNEL);
596 if (rval) {
597 kfree(conn_info);
598 return rval;
599 }
600
601 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
602 if (rval) {
603 /* delete doorbell from doorbell recovery mechanism */
604 rval = qedi_ops->common->db_recovery_del(qedi->cdev,
605 qedi_ep->p_doorbell,
606 &qedi_ep->db_data);
607
608 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
609 rval, qedi_ep);
610 }
611
612 kfree(conn_info);
613 return rval;
614 }
615
qedi_conn_start(struct iscsi_cls_conn * cls_conn)616 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
617 {
618 struct iscsi_conn *conn = cls_conn->dd_data;
619 struct qedi_conn *qedi_conn = conn->dd_data;
620 struct qedi_ctx *qedi;
621 int rval;
622
623 qedi = qedi_conn->qedi;
624
625 rval = qedi_iscsi_update_conn(qedi, qedi_conn);
626 if (rval) {
627 iscsi_conn_printk(KERN_ALERT, conn,
628 "conn_start: FW offload conn failed.\n");
629 rval = -EINVAL;
630 goto start_err;
631 }
632
633 spin_lock(&qedi_conn->tmf_work_lock);
634 qedi_conn->fw_cleanup_works = 0;
635 qedi_conn->ep_disconnect_starting = false;
636 spin_unlock(&qedi_conn->tmf_work_lock);
637
638 qedi_conn->abrt_conn = 0;
639
640 rval = iscsi_conn_start(cls_conn);
641 if (rval) {
642 iscsi_conn_printk(KERN_ALERT, conn,
643 "iscsi_conn_start: FW offload conn failed!!\n");
644 }
645
646 start_err:
647 return rval;
648 }
649
qedi_conn_destroy(struct iscsi_cls_conn * cls_conn)650 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
651 {
652 struct iscsi_conn *conn = cls_conn->dd_data;
653 struct qedi_conn *qedi_conn = conn->dd_data;
654 struct Scsi_Host *shost;
655 struct qedi_ctx *qedi;
656
657 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
658 qedi = iscsi_host_priv(shost);
659
660 qedi_conn_free_login_resources(qedi, qedi_conn);
661 iscsi_conn_teardown(cls_conn);
662 }
663
qedi_ep_get_param(struct iscsi_endpoint * ep,enum iscsi_param param,char * buf)664 static int qedi_ep_get_param(struct iscsi_endpoint *ep,
665 enum iscsi_param param, char *buf)
666 {
667 struct qedi_endpoint *qedi_ep = ep->dd_data;
668 int len;
669
670 if (!qedi_ep)
671 return -ENOTCONN;
672
673 switch (param) {
674 case ISCSI_PARAM_CONN_PORT:
675 len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
676 break;
677 case ISCSI_PARAM_CONN_ADDRESS:
678 if (qedi_ep->ip_type == TCP_IPV4)
679 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
680 else
681 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
682 break;
683 default:
684 return -ENOTCONN;
685 }
686
687 return len;
688 }
689
qedi_host_get_param(struct Scsi_Host * shost,enum iscsi_host_param param,char * buf)690 static int qedi_host_get_param(struct Scsi_Host *shost,
691 enum iscsi_host_param param, char *buf)
692 {
693 struct qedi_ctx *qedi;
694 int len;
695
696 qedi = iscsi_host_priv(shost);
697
698 switch (param) {
699 case ISCSI_HOST_PARAM_HWADDRESS:
700 len = sysfs_format_mac(buf, qedi->mac, 6);
701 break;
702 case ISCSI_HOST_PARAM_NETDEV_NAME:
703 len = sprintf(buf, "host%d\n", shost->host_no);
704 break;
705 case ISCSI_HOST_PARAM_IPADDRESS:
706 if (qedi->ip_type == TCP_IPV4)
707 len = sprintf(buf, "%pI4\n", qedi->src_ip);
708 else
709 len = sprintf(buf, "%pI6\n", qedi->src_ip);
710 break;
711 default:
712 return iscsi_host_get_param(shost, param, buf);
713 }
714
715 return len;
716 }
717
qedi_conn_get_stats(struct iscsi_cls_conn * cls_conn,struct iscsi_stats * stats)718 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
719 struct iscsi_stats *stats)
720 {
721 struct iscsi_conn *conn = cls_conn->dd_data;
722 struct qed_iscsi_stats iscsi_stats;
723 struct Scsi_Host *shost;
724 struct qedi_ctx *qedi;
725
726 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
727 qedi = iscsi_host_priv(shost);
728 qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
729
730 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
731 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
732 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
733 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
734 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
735
736 stats->txdata_octets = conn->txdata_octets;
737 stats->rxdata_octets = conn->rxdata_octets;
738 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
739 stats->dataout_pdus = conn->dataout_pdus_cnt;
740 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
741 stats->datain_pdus = conn->datain_pdus_cnt;
742 stats->r2t_pdus = conn->r2t_pdus_cnt;
743 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
744 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
745 stats->digest_err = 0;
746 stats->timeout_err = 0;
747 strcpy(stats->custom[0].desc, "eh_abort_cnt");
748 stats->custom[0].value = conn->eh_abort_cnt;
749 stats->custom_length = 1;
750 }
751
qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn * qedi_conn)752 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
753 {
754 struct scsi_sge *bd_tbl;
755
756 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
757
758 bd_tbl->sge_addr.hi =
759 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
760 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
761 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
762 qedi_conn->gen_pdu.req_buf;
763 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
764 bd_tbl->sge_addr.hi =
765 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
766 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
767 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
768 }
769
qedi_iscsi_send_generic_request(struct iscsi_task * task)770 static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
771 {
772 struct qedi_cmd *cmd = task->dd_data;
773 struct qedi_conn *qedi_conn = cmd->conn;
774 char *buf;
775 int data_len;
776 int rc = 0;
777
778 qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
779 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
780 case ISCSI_OP_LOGIN:
781 qedi_send_iscsi_login(qedi_conn, task);
782 break;
783 case ISCSI_OP_NOOP_OUT:
784 data_len = qedi_conn->gen_pdu.req_buf_size;
785 buf = qedi_conn->gen_pdu.req_buf;
786 if (data_len)
787 rc = qedi_send_iscsi_nopout(qedi_conn, task,
788 buf, data_len, 1);
789 else
790 rc = qedi_send_iscsi_nopout(qedi_conn, task,
791 NULL, 0, 1);
792 break;
793 case ISCSI_OP_LOGOUT:
794 rc = qedi_send_iscsi_logout(qedi_conn, task);
795 break;
796 case ISCSI_OP_SCSI_TMFUNC:
797 rc = qedi_send_iscsi_tmf(qedi_conn, task);
798 break;
799 case ISCSI_OP_TEXT:
800 rc = qedi_send_iscsi_text(qedi_conn, task);
801 break;
802 default:
803 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
804 "unsupported op 0x%x\n", task->hdr->opcode);
805 }
806
807 return rc;
808 }
809
qedi_mtask_xmit(struct iscsi_conn * conn,struct iscsi_task * task)810 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
811 {
812 struct qedi_conn *qedi_conn = conn->dd_data;
813 struct qedi_cmd *cmd = task->dd_data;
814
815 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
816
817 qedi_conn->gen_pdu.req_buf_size = task->data_count;
818
819 if (task->data_count) {
820 memcpy(qedi_conn->gen_pdu.req_buf, task->data,
821 task->data_count);
822 qedi_conn->gen_pdu.req_wr_ptr =
823 qedi_conn->gen_pdu.req_buf + task->data_count;
824 }
825
826 cmd->conn = conn->dd_data;
827 return qedi_iscsi_send_generic_request(task);
828 }
829
qedi_task_xmit(struct iscsi_task * task)830 static int qedi_task_xmit(struct iscsi_task *task)
831 {
832 struct iscsi_conn *conn = task->conn;
833 struct qedi_conn *qedi_conn = conn->dd_data;
834 struct qedi_cmd *cmd = task->dd_data;
835 struct scsi_cmnd *sc = task->sc;
836
837 /* Clear now so in cleanup_task we know it didn't make it */
838 cmd->scsi_cmd = NULL;
839 cmd->task_id = U16_MAX;
840
841 if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags))
842 return -ENODEV;
843
844 if (test_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags))
845 return -EACCES;
846
847 cmd->state = 0;
848 cmd->task = NULL;
849 cmd->use_slowpath = false;
850 cmd->conn = qedi_conn;
851 cmd->task = task;
852 cmd->io_cmd_in_list = false;
853 INIT_LIST_HEAD(&cmd->io_cmd);
854
855 if (!sc)
856 return qedi_mtask_xmit(conn, task);
857
858 cmd->scsi_cmd = sc;
859 return qedi_iscsi_send_ioreq(task);
860 }
861
862 static struct iscsi_endpoint *
qedi_ep_connect(struct Scsi_Host * shost,struct sockaddr * dst_addr,int non_blocking)863 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
864 int non_blocking)
865 {
866 struct qedi_ctx *qedi;
867 struct iscsi_endpoint *ep;
868 struct qedi_endpoint *qedi_ep;
869 struct sockaddr_in *addr;
870 struct sockaddr_in6 *addr6;
871 struct iscsi_path path_req;
872 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
873 u32 iscsi_cid = QEDI_CID_RESERVED;
874 u16 len = 0;
875 char *buf = NULL;
876 int ret, tmp;
877
878 if (!shost) {
879 ret = -ENXIO;
880 QEDI_ERR(NULL, "shost is NULL\n");
881 return ERR_PTR(ret);
882 }
883
884 if (qedi_do_not_recover) {
885 ret = -ENOMEM;
886 return ERR_PTR(ret);
887 }
888
889 qedi = iscsi_host_priv(shost);
890
891 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
892 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
893 ret = -ENOMEM;
894 return ERR_PTR(ret);
895 }
896
897 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
898 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
899 return ERR_PTR(-ENXIO);
900 }
901
902 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
903 if (!ep) {
904 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
905 ret = -ENOMEM;
906 return ERR_PTR(ret);
907 }
908 qedi_ep = ep->dd_data;
909 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
910 qedi_ep->state = EP_STATE_IDLE;
911 qedi_ep->iscsi_cid = (u32)-1;
912 qedi_ep->qedi = qedi;
913
914 if (dst_addr->sa_family == AF_INET) {
915 addr = (struct sockaddr_in *)dst_addr;
916 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
917 sizeof(struct in_addr));
918 qedi_ep->dst_port = ntohs(addr->sin_port);
919 qedi_ep->ip_type = TCP_IPV4;
920 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
921 "dst_addr=%pI4, dst_port=%u\n",
922 qedi_ep->dst_addr, qedi_ep->dst_port);
923 } else if (dst_addr->sa_family == AF_INET6) {
924 addr6 = (struct sockaddr_in6 *)dst_addr;
925 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
926 sizeof(struct in6_addr));
927 qedi_ep->dst_port = ntohs(addr6->sin6_port);
928 qedi_ep->ip_type = TCP_IPV6;
929 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
930 "dst_addr=%pI6, dst_port=%u\n",
931 qedi_ep->dst_addr, qedi_ep->dst_port);
932 } else {
933 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
934 }
935
936 ret = qedi_alloc_sq(qedi, qedi_ep);
937 if (ret)
938 goto ep_conn_exit;
939
940 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
941 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
942
943 if (ret) {
944 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
945 ret = -ENXIO;
946 goto ep_free_sq;
947 }
948
949 iscsi_cid = qedi_ep->handle;
950 qedi_ep->iscsi_cid = iscsi_cid;
951
952 init_waitqueue_head(&qedi_ep->ofld_wait);
953 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
954 qedi_ep->state = EP_STATE_OFLDCONN_START;
955 qedi->ep_tbl[iscsi_cid] = qedi_ep;
956
957 buf = (char *)&path_req;
958 len = sizeof(path_req);
959 memset(&path_req, 0, len);
960
961 msg_type = ISCSI_KEVENT_PATH_REQ;
962 path_req.handle = (u64)qedi_ep->iscsi_cid;
963 path_req.pmtu = qedi->ll2_mtu;
964 qedi_ep->pmtu = qedi->ll2_mtu;
965 if (qedi_ep->ip_type == TCP_IPV4) {
966 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
967 sizeof(struct in_addr));
968 path_req.ip_addr_len = 4;
969 } else {
970 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
971 sizeof(struct in6_addr));
972 path_req.ip_addr_len = 16;
973 }
974
975 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
976 len);
977 if (ret) {
978 QEDI_ERR(&qedi->dbg_ctx,
979 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
980 iscsi_cid, ret);
981 goto ep_rel_conn;
982 }
983
984 atomic_inc(&qedi->num_offloads);
985 return ep;
986
987 ep_rel_conn:
988 qedi->ep_tbl[iscsi_cid] = NULL;
989 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
990 if (tmp)
991 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
992 tmp);
993 ep_free_sq:
994 qedi_free_sq(qedi, qedi_ep);
995 ep_conn_exit:
996 iscsi_destroy_endpoint(ep);
997 return ERR_PTR(ret);
998 }
999
qedi_ep_poll(struct iscsi_endpoint * ep,int timeout_ms)1000 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1001 {
1002 struct qedi_endpoint *qedi_ep;
1003 int ret = 0;
1004
1005 if (qedi_do_not_recover)
1006 return 1;
1007
1008 qedi_ep = ep->dd_data;
1009 if (qedi_ep->state == EP_STATE_IDLE ||
1010 qedi_ep->state == EP_STATE_OFLDCONN_NONE ||
1011 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
1012 return -1;
1013
1014 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
1015 ret = 1;
1016
1017 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
1018 QEDI_OFLD_WAIT_STATE(qedi_ep),
1019 msecs_to_jiffies(timeout_ms));
1020
1021 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
1022 ret = -1;
1023
1024 if (ret > 0)
1025 return 1;
1026 else if (!ret)
1027 return 0;
1028 else
1029 return ret;
1030 }
1031
qedi_cleanup_active_cmd_list(struct qedi_conn * qedi_conn)1032 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
1033 {
1034 struct qedi_cmd *cmd, *cmd_tmp;
1035
1036 spin_lock(&qedi_conn->list_lock);
1037 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1038 io_cmd) {
1039 list_del_init(&cmd->io_cmd);
1040 qedi_conn->active_cmd_count--;
1041 }
1042 spin_unlock(&qedi_conn->list_lock);
1043 }
1044
qedi_ep_disconnect(struct iscsi_endpoint * ep)1045 static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
1046 {
1047 struct qedi_endpoint *qedi_ep;
1048 struct qedi_conn *qedi_conn = NULL;
1049 struct qedi_ctx *qedi;
1050 int ret = 0;
1051 int wait_delay;
1052 int abrt_conn = 0;
1053
1054 wait_delay = 60 * HZ + DEF_MAX_RT_TIME;
1055 qedi_ep = ep->dd_data;
1056 qedi = qedi_ep->qedi;
1057
1058 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
1059 goto ep_exit_recover;
1060
1061 if (qedi_ep->state != EP_STATE_OFLDCONN_NONE)
1062 flush_work(&qedi_ep->offload_work);
1063
1064 if (qedi_ep->conn) {
1065 qedi_conn = qedi_ep->conn;
1066 abrt_conn = qedi_conn->abrt_conn;
1067
1068 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1069 "cid=0x%x qedi_ep=%p waiting for %d tmfs\n",
1070 qedi_ep->iscsi_cid, qedi_ep,
1071 qedi_conn->fw_cleanup_works);
1072
1073 spin_lock(&qedi_conn->tmf_work_lock);
1074 qedi_conn->ep_disconnect_starting = true;
1075 while (qedi_conn->fw_cleanup_works > 0) {
1076 spin_unlock(&qedi_conn->tmf_work_lock);
1077 msleep(1000);
1078 spin_lock(&qedi_conn->tmf_work_lock);
1079 }
1080 spin_unlock(&qedi_conn->tmf_work_lock);
1081
1082 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
1083 if (qedi_do_not_recover) {
1084 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1085 "Do not recover cid=0x%x\n",
1086 qedi_ep->iscsi_cid);
1087 goto ep_exit_recover;
1088 }
1089 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1090 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
1091 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
1092 qedi_cleanup_active_cmd_list(qedi_conn);
1093 goto ep_release_conn;
1094 }
1095 }
1096
1097 if (qedi_do_not_recover)
1098 goto ep_exit_recover;
1099
1100 switch (qedi_ep->state) {
1101 case EP_STATE_OFLDCONN_START:
1102 case EP_STATE_OFLDCONN_NONE:
1103 goto ep_release_conn;
1104 case EP_STATE_OFLDCONN_FAILED:
1105 break;
1106 case EP_STATE_OFLDCONN_COMPL:
1107 if (unlikely(!qedi_conn))
1108 break;
1109
1110 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1111 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1112 qedi_conn->active_cmd_count, abrt_conn,
1113 qedi_ep->state,
1114 qedi_ep->iscsi_cid,
1115 qedi_ep->conn
1116 );
1117
1118 if (!qedi_conn->active_cmd_count)
1119 abrt_conn = 0;
1120 else
1121 abrt_conn = 1;
1122
1123 if (abrt_conn)
1124 qedi_clearsq(qedi, qedi_conn, NULL);
1125 break;
1126 default:
1127 break;
1128 }
1129
1130 if (!abrt_conn)
1131 wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer;
1132
1133 qedi_ep->state = EP_STATE_DISCONN_START;
1134
1135 if (test_bit(QEDI_IN_SHUTDOWN, &qedi->flags) ||
1136 test_bit(QEDI_IN_RECOVERY, &qedi->flags))
1137 goto ep_release_conn;
1138
1139 /* Delete doorbell from doorbell recovery mechanism */
1140 ret = qedi_ops->common->db_recovery_del(qedi->cdev,
1141 qedi_ep->p_doorbell,
1142 &qedi_ep->db_data);
1143
1144 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1145 if (ret) {
1146 QEDI_WARN(&qedi->dbg_ctx,
1147 "destroy_conn failed returned %d\n", ret);
1148 } else {
1149 ret = wait_event_interruptible_timeout(
1150 qedi_ep->tcp_ofld_wait,
1151 (qedi_ep->state !=
1152 EP_STATE_DISCONN_START),
1153 wait_delay);
1154 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1155 QEDI_WARN(&qedi->dbg_ctx,
1156 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1157 ret, wait_delay, qedi_ep->iscsi_cid);
1158 }
1159 }
1160
1161 ep_release_conn:
1162 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1163 if (ret)
1164 QEDI_WARN(&qedi->dbg_ctx,
1165 "release_conn returned %d, cid=0x%x\n",
1166 ret, qedi_ep->iscsi_cid);
1167 ep_exit_recover:
1168 qedi_ep->state = EP_STATE_IDLE;
1169 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1170 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1171 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1172 qedi_free_sq(qedi, qedi_ep);
1173
1174 if (qedi_conn)
1175 qedi_conn->ep = NULL;
1176
1177 qedi_ep->conn = NULL;
1178 qedi_ep->qedi = NULL;
1179 atomic_dec(&qedi->num_offloads);
1180
1181 iscsi_destroy_endpoint(ep);
1182 }
1183
qedi_data_avail(struct qedi_ctx * qedi,u16 vlanid)1184 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1185 {
1186 struct qed_dev *cdev = qedi->cdev;
1187 struct qedi_uio_dev *udev;
1188 struct qedi_uio_ctrl *uctrl;
1189 struct sk_buff *skb;
1190 u32 len;
1191 int rc = 0;
1192
1193 udev = qedi->udev;
1194 if (!udev) {
1195 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1196 return -EINVAL;
1197 }
1198
1199 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1200 if (!uctrl) {
1201 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1202 return -EINVAL;
1203 }
1204
1205 len = uctrl->host_tx_pkt_len;
1206 if (!len) {
1207 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1208 return -EINVAL;
1209 }
1210
1211 skb = alloc_skb(len, GFP_ATOMIC);
1212 if (!skb) {
1213 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1214 return -EINVAL;
1215 }
1216
1217 skb_put(skb, len);
1218 memcpy(skb->data, udev->tx_pkt, len);
1219 skb->ip_summed = CHECKSUM_NONE;
1220
1221 if (vlanid)
1222 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1223
1224 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0);
1225 if (rc) {
1226 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1227 rc);
1228 kfree_skb(skb);
1229 }
1230
1231 uctrl->host_tx_pkt_len = 0;
1232 uctrl->hw_tx_cons++;
1233
1234 return rc;
1235 }
1236
qedi_offload_work(struct work_struct * work)1237 static void qedi_offload_work(struct work_struct *work)
1238 {
1239 struct qedi_endpoint *qedi_ep =
1240 container_of(work, struct qedi_endpoint, offload_work);
1241 struct qedi_ctx *qedi;
1242 int wait_delay = 5 * HZ;
1243 int ret;
1244
1245 qedi = qedi_ep->qedi;
1246
1247 ret = qedi_iscsi_offload_conn(qedi_ep);
1248 if (ret) {
1249 QEDI_ERR(&qedi->dbg_ctx,
1250 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1251 qedi_ep->iscsi_cid, qedi_ep, ret);
1252 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1253 return;
1254 }
1255
1256 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1257 (qedi_ep->state ==
1258 EP_STATE_OFLDCONN_COMPL),
1259 wait_delay);
1260 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1261 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1262 QEDI_ERR(&qedi->dbg_ctx,
1263 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1264 qedi_ep->iscsi_cid, qedi_ep);
1265 }
1266 }
1267
qedi_set_path(struct Scsi_Host * shost,struct iscsi_path * path_data)1268 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1269 {
1270 struct qedi_ctx *qedi;
1271 struct qedi_endpoint *qedi_ep;
1272 int ret = 0;
1273 u32 iscsi_cid;
1274 u16 port_id = 0;
1275
1276 if (!shost) {
1277 ret = -ENXIO;
1278 QEDI_ERR(NULL, "shost is NULL\n");
1279 return ret;
1280 }
1281
1282 if (strcmp(shost->hostt->proc_name, "qedi")) {
1283 ret = -ENXIO;
1284 QEDI_ERR(NULL, "shost %s is invalid\n",
1285 shost->hostt->proc_name);
1286 return ret;
1287 }
1288
1289 qedi = iscsi_host_priv(shost);
1290 if (path_data->handle == QEDI_PATH_HANDLE) {
1291 ret = qedi_data_avail(qedi, path_data->vlan_id);
1292 goto set_path_exit;
1293 }
1294
1295 iscsi_cid = (u32)path_data->handle;
1296 if (iscsi_cid >= qedi->max_active_conns) {
1297 ret = -EINVAL;
1298 goto set_path_exit;
1299 }
1300 qedi_ep = qedi->ep_tbl[iscsi_cid];
1301 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1302 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
1303 if (!qedi_ep) {
1304 ret = -EINVAL;
1305 goto set_path_exit;
1306 }
1307
1308 if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
1309 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
1310 qedi_ep->state = EP_STATE_OFLDCONN_NONE;
1311 ret = -EIO;
1312 goto set_path_exit;
1313 }
1314
1315 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
1316 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
1317
1318 qedi_ep->vlan_id = path_data->vlan_id;
1319 if (path_data->pmtu < DEF_PATH_MTU) {
1320 qedi_ep->pmtu = qedi->ll2_mtu;
1321 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1322 "MTU cannot be %u, using default MTU %u\n",
1323 path_data->pmtu, qedi_ep->pmtu);
1324 }
1325
1326 if (path_data->pmtu != qedi->ll2_mtu) {
1327 if (path_data->pmtu > JUMBO_MTU) {
1328 ret = -EINVAL;
1329 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
1330 goto set_path_exit;
1331 }
1332
1333 qedi_reset_host_mtu(qedi, path_data->pmtu);
1334 qedi_ep->pmtu = qedi->ll2_mtu;
1335 }
1336
1337 port_id = qedi_ep->src_port;
1338 if (port_id >= QEDI_LOCAL_PORT_MIN &&
1339 port_id < QEDI_LOCAL_PORT_MAX) {
1340 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
1341 port_id = 0;
1342 } else {
1343 port_id = 0;
1344 }
1345
1346 if (!port_id) {
1347 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
1348 if (port_id == QEDI_LOCAL_PORT_INVALID) {
1349 QEDI_ERR(&qedi->dbg_ctx,
1350 "Failed to allocate port id for iscsi_cid=0x%x\n",
1351 iscsi_cid);
1352 ret = -ENOMEM;
1353 goto set_path_exit;
1354 }
1355 }
1356
1357 qedi_ep->src_port = port_id;
1358
1359 if (qedi_ep->ip_type == TCP_IPV4) {
1360 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
1361 sizeof(struct in_addr));
1362 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
1363 sizeof(struct in_addr));
1364 qedi->ip_type = TCP_IPV4;
1365
1366 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1367 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
1368 qedi_ep->src_addr, qedi_ep->src_port,
1369 qedi_ep->dst_addr, qedi_ep->dst_port);
1370 } else {
1371 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
1372 sizeof(struct in6_addr));
1373 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
1374 sizeof(struct in6_addr));
1375 qedi->ip_type = TCP_IPV6;
1376
1377 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1378 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
1379 qedi_ep->src_addr, qedi_ep->src_port,
1380 qedi_ep->dst_addr, qedi_ep->dst_port);
1381 }
1382
1383 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
1384 queue_work(qedi->offload_thread, &qedi_ep->offload_work);
1385
1386 ret = 0;
1387
1388 set_path_exit:
1389 return ret;
1390 }
1391
qedi_attr_is_visible(int param_type,int param)1392 static umode_t qedi_attr_is_visible(int param_type, int param)
1393 {
1394 switch (param_type) {
1395 case ISCSI_HOST_PARAM:
1396 switch (param) {
1397 case ISCSI_HOST_PARAM_NETDEV_NAME:
1398 case ISCSI_HOST_PARAM_HWADDRESS:
1399 case ISCSI_HOST_PARAM_IPADDRESS:
1400 return 0444;
1401 default:
1402 return 0;
1403 }
1404 case ISCSI_PARAM:
1405 switch (param) {
1406 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1407 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1408 case ISCSI_PARAM_HDRDGST_EN:
1409 case ISCSI_PARAM_DATADGST_EN:
1410 case ISCSI_PARAM_CONN_ADDRESS:
1411 case ISCSI_PARAM_CONN_PORT:
1412 case ISCSI_PARAM_EXP_STATSN:
1413 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1414 case ISCSI_PARAM_PERSISTENT_PORT:
1415 case ISCSI_PARAM_PING_TMO:
1416 case ISCSI_PARAM_RECV_TMO:
1417 case ISCSI_PARAM_INITIAL_R2T_EN:
1418 case ISCSI_PARAM_MAX_R2T:
1419 case ISCSI_PARAM_IMM_DATA_EN:
1420 case ISCSI_PARAM_FIRST_BURST:
1421 case ISCSI_PARAM_MAX_BURST:
1422 case ISCSI_PARAM_PDU_INORDER_EN:
1423 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1424 case ISCSI_PARAM_ERL:
1425 case ISCSI_PARAM_TARGET_NAME:
1426 case ISCSI_PARAM_TPGT:
1427 case ISCSI_PARAM_USERNAME:
1428 case ISCSI_PARAM_PASSWORD:
1429 case ISCSI_PARAM_USERNAME_IN:
1430 case ISCSI_PARAM_PASSWORD_IN:
1431 case ISCSI_PARAM_FAST_ABORT:
1432 case ISCSI_PARAM_ABORT_TMO:
1433 case ISCSI_PARAM_LU_RESET_TMO:
1434 case ISCSI_PARAM_TGT_RESET_TMO:
1435 case ISCSI_PARAM_IFACE_NAME:
1436 case ISCSI_PARAM_INITIATOR_NAME:
1437 case ISCSI_PARAM_BOOT_ROOT:
1438 case ISCSI_PARAM_BOOT_NIC:
1439 case ISCSI_PARAM_BOOT_TARGET:
1440 return 0444;
1441 default:
1442 return 0;
1443 }
1444 }
1445
1446 return 0;
1447 }
1448
qedi_cleanup_task(struct iscsi_task * task)1449 static void qedi_cleanup_task(struct iscsi_task *task)
1450 {
1451 struct qedi_cmd *cmd;
1452
1453 if (task->state == ISCSI_TASK_PENDING) {
1454 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
1455 refcount_read(&task->refcount));
1456 return;
1457 }
1458
1459 if (task->sc)
1460 qedi_iscsi_unmap_sg_list(task->dd_data);
1461
1462 cmd = task->dd_data;
1463 if (cmd->task_id != U16_MAX)
1464 qedi_clear_task_idx(iscsi_host_priv(task->conn->session->host),
1465 cmd->task_id);
1466
1467 cmd->task_id = U16_MAX;
1468 cmd->scsi_cmd = NULL;
1469 }
1470
1471 struct iscsi_transport qedi_iscsi_transport = {
1472 .owner = THIS_MODULE,
1473 .name = QEDI_MODULE_NAME,
1474 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
1475 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
1476 .create_session = qedi_session_create,
1477 .destroy_session = qedi_session_destroy,
1478 .create_conn = qedi_conn_create,
1479 .bind_conn = qedi_conn_bind,
1480 .unbind_conn = iscsi_conn_unbind,
1481 .start_conn = qedi_conn_start,
1482 .stop_conn = iscsi_conn_stop,
1483 .destroy_conn = qedi_conn_destroy,
1484 .set_param = iscsi_set_param,
1485 .get_ep_param = qedi_ep_get_param,
1486 .get_conn_param = iscsi_conn_get_param,
1487 .get_session_param = iscsi_session_get_param,
1488 .get_host_param = qedi_host_get_param,
1489 .send_pdu = iscsi_conn_send_pdu,
1490 .get_stats = qedi_conn_get_stats,
1491 .xmit_task = qedi_task_xmit,
1492 .cleanup_task = qedi_cleanup_task,
1493 .session_recovery_timedout = iscsi_session_recovery_timedout,
1494 .ep_connect = qedi_ep_connect,
1495 .ep_poll = qedi_ep_poll,
1496 .ep_disconnect = qedi_ep_disconnect,
1497 .set_path = qedi_set_path,
1498 .attr_is_visible = qedi_attr_is_visible,
1499 };
1500
qedi_start_conn_recovery(struct qedi_ctx * qedi,struct qedi_conn * qedi_conn)1501 void qedi_start_conn_recovery(struct qedi_ctx *qedi,
1502 struct qedi_conn *qedi_conn)
1503 {
1504 struct iscsi_cls_session *cls_sess;
1505 struct iscsi_cls_conn *cls_conn;
1506 struct iscsi_conn *conn;
1507
1508 cls_conn = qedi_conn->cls_conn;
1509 conn = cls_conn->dd_data;
1510 cls_sess = iscsi_conn_to_session(cls_conn);
1511
1512 if (iscsi_is_session_online(cls_sess)) {
1513 qedi_conn->abrt_conn = 1;
1514 QEDI_ERR(&qedi->dbg_ctx,
1515 "Failing connection, state=0x%x, cid=0x%x\n",
1516 conn->session->state, qedi_conn->iscsi_conn_id);
1517 iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
1518 ISCSI_ERR_CONN_FAILED);
1519 }
1520 }
1521
1522 static const struct {
1523 enum iscsi_error_types error_code;
1524 char *err_string;
1525 } qedi_iscsi_error[] = {
1526 { ISCSI_STATUS_NONE,
1527 "tcp_error none"
1528 },
1529 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
1530 "task cid mismatch"
1531 },
1532 { ISCSI_CONN_ERROR_TASK_NOT_VALID,
1533 "invalid task"
1534 },
1535 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
1536 "rq ring full"
1537 },
1538 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
1539 "cmdq ring full"
1540 },
1541 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
1542 "sge caching failed"
1543 },
1544 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
1545 "hdr digest error"
1546 },
1547 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
1548 "local cmpl error"
1549 },
1550 { ISCSI_CONN_ERROR_DATA_OVERRUN,
1551 "invalid task"
1552 },
1553 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
1554 "out of sge error"
1555 },
1556 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
1557 "tcp ip fragment error"
1558 },
1559 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
1560 "AHS len protocol error"
1561 },
1562 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
1563 "itt out of range error"
1564 },
1565 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
1566 "data seg more than pdu size"
1567 },
1568 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
1569 "invalid opcode"
1570 },
1571 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
1572 "invalid opcode before update"
1573 },
1574 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
1575 "unexpected opcode"
1576 },
1577 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
1578 "r2t carries no data"
1579 },
1580 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
1581 "data sn error"
1582 },
1583 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
1584 "data TTT error"
1585 },
1586 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
1587 "r2t TTT error"
1588 },
1589 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
1590 "buffer offset error"
1591 },
1592 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
1593 "buffer offset ooo"
1594 },
1595 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
1596 "data seg len 0"
1597 },
1598 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
1599 "data xer len error"
1600 },
1601 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
1602 "data xer len1 error"
1603 },
1604 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
1605 "data xer len2 error"
1606 },
1607 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
1608 "protocol lun error"
1609 },
1610 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
1611 "f bit zero error"
1612 },
1613 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
1614 "exp stat sn error"
1615 },
1616 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
1617 "dsl not zero error"
1618 },
1619 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
1620 "invalid dsl"
1621 },
1622 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
1623 "data seg len too big"
1624 },
1625 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
1626 "outstanding r2t count error"
1627 },
1628 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
1629 "sense datalen error"
1630 },
1631 };
1632
qedi_get_iscsi_error(enum iscsi_error_types err_code)1633 static char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
1634 {
1635 int i;
1636 char *msg = NULL;
1637
1638 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
1639 if (qedi_iscsi_error[i].error_code == err_code) {
1640 msg = qedi_iscsi_error[i].err_string;
1641 break;
1642 }
1643 }
1644 return msg;
1645 }
1646
qedi_process_iscsi_error(struct qedi_endpoint * ep,struct iscsi_eqe_data * data)1647 void qedi_process_iscsi_error(struct qedi_endpoint *ep,
1648 struct iscsi_eqe_data *data)
1649 {
1650 struct qedi_conn *qedi_conn;
1651 struct qedi_ctx *qedi;
1652 char warn_notice[] = "iscsi_warning";
1653 char error_notice[] = "iscsi_error";
1654 char unknown_msg[] = "Unknown error";
1655 char *message;
1656 int need_recovery = 0;
1657 u32 err_mask = 0;
1658 char *msg;
1659
1660 if (!ep)
1661 return;
1662
1663 qedi_conn = ep->conn;
1664 if (!qedi_conn)
1665 return;
1666
1667 qedi = ep->qedi;
1668
1669 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
1670 data->error_code);
1671
1672 if (err_mask) {
1673 need_recovery = 0;
1674 message = warn_notice;
1675 } else {
1676 need_recovery = 1;
1677 message = error_notice;
1678 }
1679
1680 msg = qedi_get_iscsi_error(data->error_code);
1681 if (!msg) {
1682 need_recovery = 0;
1683 msg = unknown_msg;
1684 }
1685
1686 iscsi_conn_printk(KERN_ALERT,
1687 qedi_conn->cls_conn->dd_data,
1688 "qedi: %s - %s\n", message, msg);
1689
1690 if (need_recovery)
1691 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1692 }
1693
qedi_process_tcp_error(struct qedi_endpoint * ep,struct iscsi_eqe_data * data)1694 void qedi_process_tcp_error(struct qedi_endpoint *ep,
1695 struct iscsi_eqe_data *data)
1696 {
1697 struct qedi_conn *qedi_conn;
1698
1699 if (!ep)
1700 return;
1701
1702 qedi_conn = ep->conn;
1703 if (!qedi_conn)
1704 return;
1705
1706 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
1707 data->error_code);
1708
1709 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1710 }
1711
