1
2
3
4
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
17int 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
33static 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
43struct 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
64static 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
98static 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
141login_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
147login_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;
152login_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;
157login_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
163static 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
187static 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
207static 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
232free_sgets:
233 qedi_destroy_cmd_pool(qedi, session);
234 return -ENOMEM;
235}
236
237static struct iscsi_cls_session *
238qedi_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
275session_teardown:
276 iscsi_session_teardown(cls_session);
277 return NULL;
278}
279
280static 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
290static struct iscsi_cls_conn *
291qedi_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
326free_conn:
327 iscsi_conn_teardown(cls_conn);
328 return NULL;
329}
330
331void 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
341void 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
351static 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
367struct 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
380static 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);
426put_ep:
427 iscsi_put_endpoint(ep);
428 return rc;
429}
430
431static 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
482static 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
500static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
501{
502 struct qedi_ctx *qedi = qedi_ep->qedi;
503 struct qed_iscsi_params_offload *conn_info;
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 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
581 if (rval)
582 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
583 rval, qedi_ep);
584
585 kfree(conn_info);
586 return rval;
587}
588
589static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
590{
591 struct iscsi_conn *conn = cls_conn->dd_data;
592 struct qedi_conn *qedi_conn = conn->dd_data;
593 struct qedi_ctx *qedi;
594 int rval;
595
596 qedi = qedi_conn->qedi;
597
598 rval = qedi_iscsi_update_conn(qedi, qedi_conn);
599 if (rval) {
600 iscsi_conn_printk(KERN_ALERT, conn,
601 "conn_start: FW offload conn failed.\n");
602 rval = -EINVAL;
603 goto start_err;
604 }
605
606 spin_lock(&qedi_conn->tmf_work_lock);
607 qedi_conn->fw_cleanup_works = 0;
608 qedi_conn->ep_disconnect_starting = false;
609 spin_unlock(&qedi_conn->tmf_work_lock);
610
611 qedi_conn->abrt_conn = 0;
612
613 rval = iscsi_conn_start(cls_conn);
614 if (rval) {
615 iscsi_conn_printk(KERN_ALERT, conn,
616 "iscsi_conn_start: FW offload conn failed!!\n");
617 }
618
619start_err:
620 return rval;
621}
622
623static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
624{
625 struct iscsi_conn *conn = cls_conn->dd_data;
626 struct qedi_conn *qedi_conn = conn->dd_data;
627 struct Scsi_Host *shost;
628 struct qedi_ctx *qedi;
629
630 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
631 qedi = iscsi_host_priv(shost);
632
633 qedi_conn_free_login_resources(qedi, qedi_conn);
634 iscsi_conn_teardown(cls_conn);
635}
636
637static int qedi_ep_get_param(struct iscsi_endpoint *ep,
638 enum iscsi_param param, char *buf)
639{
640 struct qedi_endpoint *qedi_ep = ep->dd_data;
641 int len;
642
643 if (!qedi_ep)
644 return -ENOTCONN;
645
646 switch (param) {
647 case ISCSI_PARAM_CONN_PORT:
648 len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
649 break;
650 case ISCSI_PARAM_CONN_ADDRESS:
651 if (qedi_ep->ip_type == TCP_IPV4)
652 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
653 else
654 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
655 break;
656 default:
657 return -ENOTCONN;
658 }
659
660 return len;
661}
662
663static int qedi_host_get_param(struct Scsi_Host *shost,
664 enum iscsi_host_param param, char *buf)
665{
666 struct qedi_ctx *qedi;
667 int len;
668
669 qedi = iscsi_host_priv(shost);
670
671 switch (param) {
672 case ISCSI_HOST_PARAM_HWADDRESS:
673 len = sysfs_format_mac(buf, qedi->mac, 6);
674 break;
675 case ISCSI_HOST_PARAM_NETDEV_NAME:
676 len = sprintf(buf, "host%d\n", shost->host_no);
677 break;
678 case ISCSI_HOST_PARAM_IPADDRESS:
679 if (qedi->ip_type == TCP_IPV4)
680 len = sprintf(buf, "%pI4\n", qedi->src_ip);
681 else
682 len = sprintf(buf, "%pI6\n", qedi->src_ip);
683 break;
684 default:
685 return iscsi_host_get_param(shost, param, buf);
686 }
687
688 return len;
689}
690
691static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
692 struct iscsi_stats *stats)
693{
694 struct iscsi_conn *conn = cls_conn->dd_data;
695 struct qed_iscsi_stats iscsi_stats;
696 struct Scsi_Host *shost;
697 struct qedi_ctx *qedi;
698
699 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
700 qedi = iscsi_host_priv(shost);
701 qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
702
703 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
704 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
705 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
706 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
707 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
708
709 stats->txdata_octets = conn->txdata_octets;
710 stats->rxdata_octets = conn->rxdata_octets;
711 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
712 stats->dataout_pdus = conn->dataout_pdus_cnt;
713 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
714 stats->datain_pdus = conn->datain_pdus_cnt;
715 stats->r2t_pdus = conn->r2t_pdus_cnt;
716 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
717 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
718 stats->digest_err = 0;
719 stats->timeout_err = 0;
720 strcpy(stats->custom[0].desc, "eh_abort_cnt");
721 stats->custom[0].value = conn->eh_abort_cnt;
722 stats->custom_length = 1;
723}
724
725static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
726{
727 struct scsi_sge *bd_tbl;
728
729 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
730
731 bd_tbl->sge_addr.hi =
732 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
733 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
734 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
735 qedi_conn->gen_pdu.req_buf;
736 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
737 bd_tbl->sge_addr.hi =
738 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
739 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
740 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
741}
742
743static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
744{
745 struct qedi_cmd *cmd = task->dd_data;
746 struct qedi_conn *qedi_conn = cmd->conn;
747 char *buf;
748 int data_len;
749 int rc = 0;
750
751 qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
752 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
753 case ISCSI_OP_LOGIN:
754 qedi_send_iscsi_login(qedi_conn, task);
755 break;
756 case ISCSI_OP_NOOP_OUT:
757 data_len = qedi_conn->gen_pdu.req_buf_size;
758 buf = qedi_conn->gen_pdu.req_buf;
759 if (data_len)
760 rc = qedi_send_iscsi_nopout(qedi_conn, task,
761 buf, data_len, 1);
762 else
763 rc = qedi_send_iscsi_nopout(qedi_conn, task,
764 NULL, 0, 1);
765 break;
766 case ISCSI_OP_LOGOUT:
767 rc = qedi_send_iscsi_logout(qedi_conn, task);
768 break;
769 case ISCSI_OP_SCSI_TMFUNC:
770 rc = qedi_send_iscsi_tmf(qedi_conn, task);
771 break;
772 case ISCSI_OP_TEXT:
773 rc = qedi_send_iscsi_text(qedi_conn, task);
774 break;
775 default:
776 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
777 "unsupported op 0x%x\n", task->hdr->opcode);
778 }
779
780 return rc;
781}
782
783static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
784{
785 struct qedi_conn *qedi_conn = conn->dd_data;
786 struct qedi_cmd *cmd = task->dd_data;
787
788 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
789
790 qedi_conn->gen_pdu.req_buf_size = task->data_count;
791
792 if (task->data_count) {
793 memcpy(qedi_conn->gen_pdu.req_buf, task->data,
794 task->data_count);
795 qedi_conn->gen_pdu.req_wr_ptr =
796 qedi_conn->gen_pdu.req_buf + task->data_count;
797 }
798
799 cmd->conn = conn->dd_data;
800 return qedi_iscsi_send_generic_request(task);
801}
802
803static int qedi_task_xmit(struct iscsi_task *task)
804{
805 struct iscsi_conn *conn = task->conn;
806 struct qedi_conn *qedi_conn = conn->dd_data;
807 struct qedi_cmd *cmd = task->dd_data;
808 struct scsi_cmnd *sc = task->sc;
809
810
811 cmd->scsi_cmd = NULL;
812 cmd->task_id = U16_MAX;
813
814 if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags))
815 return -ENODEV;
816
817 if (test_bit(QEDI_BLOCK_IO, &qedi_conn->qedi->flags))
818 return -EACCES;
819
820 cmd->state = 0;
821 cmd->task = NULL;
822 cmd->use_slowpath = false;
823 cmd->conn = qedi_conn;
824 cmd->task = task;
825 cmd->io_cmd_in_list = false;
826 INIT_LIST_HEAD(&cmd->io_cmd);
827
828 if (!sc)
829 return qedi_mtask_xmit(conn, task);
830
831 cmd->scsi_cmd = sc;
832 return qedi_iscsi_send_ioreq(task);
833}
834
835static struct iscsi_endpoint *
836qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
837 int non_blocking)
838{
839 struct qedi_ctx *qedi;
840 struct iscsi_endpoint *ep;
841 struct qedi_endpoint *qedi_ep;
842 struct sockaddr_in *addr;
843 struct sockaddr_in6 *addr6;
844 struct iscsi_path path_req;
845 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
846 u32 iscsi_cid = QEDI_CID_RESERVED;
847 u16 len = 0;
848 char *buf = NULL;
849 int ret, tmp;
850
851 if (!shost) {
852 ret = -ENXIO;
853 QEDI_ERR(NULL, "shost is NULL\n");
854 return ERR_PTR(ret);
855 }
856
857 if (qedi_do_not_recover) {
858 ret = -ENOMEM;
859 return ERR_PTR(ret);
860 }
861
862 qedi = iscsi_host_priv(shost);
863
864 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
865 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
866 ret = -ENOMEM;
867 return ERR_PTR(ret);
868 }
869
870 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
871 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
872 return ERR_PTR(-ENXIO);
873 }
874
875 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
876 if (!ep) {
877 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
878 ret = -ENOMEM;
879 return ERR_PTR(ret);
880 }
881 qedi_ep = ep->dd_data;
882 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
883 qedi_ep->state = EP_STATE_IDLE;
884 qedi_ep->iscsi_cid = (u32)-1;
885 qedi_ep->qedi = qedi;
886
887 if (dst_addr->sa_family == AF_INET) {
888 addr = (struct sockaddr_in *)dst_addr;
889 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
890 sizeof(struct in_addr));
891 qedi_ep->dst_port = ntohs(addr->sin_port);
892 qedi_ep->ip_type = TCP_IPV4;
893 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
894 "dst_addr=%pI4, dst_port=%u\n",
895 qedi_ep->dst_addr, qedi_ep->dst_port);
896 } else if (dst_addr->sa_family == AF_INET6) {
897 addr6 = (struct sockaddr_in6 *)dst_addr;
898 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
899 sizeof(struct in6_addr));
900 qedi_ep->dst_port = ntohs(addr6->sin6_port);
901 qedi_ep->ip_type = TCP_IPV6;
902 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
903 "dst_addr=%pI6, dst_port=%u\n",
904 qedi_ep->dst_addr, qedi_ep->dst_port);
905 } else {
906 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
907 }
908
909 ret = qedi_alloc_sq(qedi, qedi_ep);
910 if (ret)
911 goto ep_conn_exit;
912
913 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
914 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
915
916 if (ret) {
917 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
918 ret = -ENXIO;
919 goto ep_free_sq;
920 }
921
922 iscsi_cid = qedi_ep->handle;
923 qedi_ep->iscsi_cid = iscsi_cid;
924
925 init_waitqueue_head(&qedi_ep->ofld_wait);
926 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
927 qedi_ep->state = EP_STATE_OFLDCONN_START;
928 qedi->ep_tbl[iscsi_cid] = qedi_ep;
929
930 buf = (char *)&path_req;
931 len = sizeof(path_req);
932 memset(&path_req, 0, len);
933
934 msg_type = ISCSI_KEVENT_PATH_REQ;
935 path_req.handle = (u64)qedi_ep->iscsi_cid;
936 path_req.pmtu = qedi->ll2_mtu;
937 qedi_ep->pmtu = qedi->ll2_mtu;
938 if (qedi_ep->ip_type == TCP_IPV4) {
939 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
940 sizeof(struct in_addr));
941 path_req.ip_addr_len = 4;
942 } else {
943 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
944 sizeof(struct in6_addr));
945 path_req.ip_addr_len = 16;
946 }
947
948 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
949 len);
950 if (ret) {
951 QEDI_ERR(&qedi->dbg_ctx,
952 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
953 iscsi_cid, ret);
954 goto ep_rel_conn;
955 }
956
957 atomic_inc(&qedi->num_offloads);
958 return ep;
959
960ep_rel_conn:
961 qedi->ep_tbl[iscsi_cid] = NULL;
962 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
963 if (tmp)
964 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
965 tmp);
966ep_free_sq:
967 qedi_free_sq(qedi, qedi_ep);
968ep_conn_exit:
969 iscsi_destroy_endpoint(ep);
970 return ERR_PTR(ret);
971}
972
973static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
974{
975 struct qedi_endpoint *qedi_ep;
976 int ret = 0;
977
978 if (qedi_do_not_recover)
979 return 1;
980
981 qedi_ep = ep->dd_data;
982 if (qedi_ep->state == EP_STATE_IDLE ||
983 qedi_ep->state == EP_STATE_OFLDCONN_NONE ||
984 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
985 return -1;
986
987 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
988 ret = 1;
989
990 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
991 QEDI_OFLD_WAIT_STATE(qedi_ep),
992 msecs_to_jiffies(timeout_ms));
993
994 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
995 ret = -1;
996
997 if (ret > 0)
998 return 1;
999 else if (!ret)
1000 return 0;
1001 else
1002 return ret;
1003}
1004
1005static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
1006{
1007 struct qedi_cmd *cmd, *cmd_tmp;
1008
1009 spin_lock(&qedi_conn->list_lock);
1010 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
1011 io_cmd) {
1012 list_del_init(&cmd->io_cmd);
1013 qedi_conn->active_cmd_count--;
1014 }
1015 spin_unlock(&qedi_conn->list_lock);
1016}
1017
1018static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
1019{
1020 struct qedi_endpoint *qedi_ep;
1021 struct qedi_conn *qedi_conn = NULL;
1022 struct qedi_ctx *qedi;
1023 int ret = 0;
1024 int wait_delay;
1025 int abrt_conn = 0;
1026
1027 wait_delay = 60 * HZ + DEF_MAX_RT_TIME;
1028 qedi_ep = ep->dd_data;
1029 qedi = qedi_ep->qedi;
1030
1031 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
1032 goto ep_exit_recover;
1033
1034 if (qedi_ep->state != EP_STATE_OFLDCONN_NONE)
1035 flush_work(&qedi_ep->offload_work);
1036
1037 if (qedi_ep->conn) {
1038 qedi_conn = qedi_ep->conn;
1039 abrt_conn = qedi_conn->abrt_conn;
1040
1041 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1042 "cid=0x%x qedi_ep=%p waiting for %d tmfs\n",
1043 qedi_ep->iscsi_cid, qedi_ep,
1044 qedi_conn->fw_cleanup_works);
1045
1046 spin_lock(&qedi_conn->tmf_work_lock);
1047 qedi_conn->ep_disconnect_starting = true;
1048 while (qedi_conn->fw_cleanup_works > 0) {
1049 spin_unlock(&qedi_conn->tmf_work_lock);
1050 msleep(1000);
1051 spin_lock(&qedi_conn->tmf_work_lock);
1052 }
1053 spin_unlock(&qedi_conn->tmf_work_lock);
1054
1055 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
1056 if (qedi_do_not_recover) {
1057 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1058 "Do not recover cid=0x%x\n",
1059 qedi_ep->iscsi_cid);
1060 goto ep_exit_recover;
1061 }
1062 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1063 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
1064 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
1065 qedi_cleanup_active_cmd_list(qedi_conn);
1066 goto ep_release_conn;
1067 }
1068 }
1069
1070 if (qedi_do_not_recover)
1071 goto ep_exit_recover;
1072
1073 switch (qedi_ep->state) {
1074 case EP_STATE_OFLDCONN_START:
1075 case EP_STATE_OFLDCONN_NONE:
1076 goto ep_release_conn;
1077 case EP_STATE_OFLDCONN_FAILED:
1078 break;
1079 case EP_STATE_OFLDCONN_COMPL:
1080 if (unlikely(!qedi_conn))
1081 break;
1082
1083 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1084 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1085 qedi_conn->active_cmd_count, abrt_conn,
1086 qedi_ep->state,
1087 qedi_ep->iscsi_cid,
1088 qedi_ep->conn
1089 );
1090
1091 if (!qedi_conn->active_cmd_count)
1092 abrt_conn = 0;
1093 else
1094 abrt_conn = 1;
1095
1096 if (abrt_conn)
1097 qedi_clearsq(qedi, qedi_conn, NULL);
1098 break;
1099 default:
1100 break;
1101 }
1102
1103 if (!abrt_conn)
1104 wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer;
1105
1106 qedi_ep->state = EP_STATE_DISCONN_START;
1107
1108 if (test_bit(QEDI_IN_SHUTDOWN, &qedi->flags) ||
1109 test_bit(QEDI_IN_RECOVERY, &qedi->flags))
1110 goto ep_release_conn;
1111
1112 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1113 if (ret) {
1114 QEDI_WARN(&qedi->dbg_ctx,
1115 "destroy_conn failed returned %d\n", ret);
1116 } else {
1117 ret = wait_event_interruptible_timeout(
1118 qedi_ep->tcp_ofld_wait,
1119 (qedi_ep->state !=
1120 EP_STATE_DISCONN_START),
1121 wait_delay);
1122 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1123 QEDI_WARN(&qedi->dbg_ctx,
1124 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1125 ret, wait_delay, qedi_ep->iscsi_cid);
1126 }
1127 }
1128
1129ep_release_conn:
1130 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1131 if (ret)
1132 QEDI_WARN(&qedi->dbg_ctx,
1133 "release_conn returned %d, cid=0x%x\n",
1134 ret, qedi_ep->iscsi_cid);
1135ep_exit_recover:
1136 qedi_ep->state = EP_STATE_IDLE;
1137 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1138 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1139 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1140 qedi_free_sq(qedi, qedi_ep);
1141
1142 if (qedi_conn)
1143 qedi_conn->ep = NULL;
1144
1145 qedi_ep->conn = NULL;
1146 qedi_ep->qedi = NULL;
1147 atomic_dec(&qedi->num_offloads);
1148
1149 iscsi_destroy_endpoint(ep);
1150}
1151
1152static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1153{
1154 struct qed_dev *cdev = qedi->cdev;
1155 struct qedi_uio_dev *udev;
1156 struct qedi_uio_ctrl *uctrl;
1157 struct sk_buff *skb;
1158 u32 len;
1159 int rc = 0;
1160
1161 udev = qedi->udev;
1162 if (!udev) {
1163 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1164 return -EINVAL;
1165 }
1166
1167 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1168 if (!uctrl) {
1169 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1170 return -EINVAL;
1171 }
1172
1173 len = uctrl->host_tx_pkt_len;
1174 if (!len) {
1175 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1176 return -EINVAL;
1177 }
1178
1179 skb = alloc_skb(len, GFP_ATOMIC);
1180 if (!skb) {
1181 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1182 return -EINVAL;
1183 }
1184
1185 skb_put(skb, len);
1186 memcpy(skb->data, udev->tx_pkt, len);
1187 skb->ip_summed = CHECKSUM_NONE;
1188
1189 if (vlanid)
1190 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1191
1192 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0);
1193 if (rc) {
1194 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1195 rc);
1196 kfree_skb(skb);
1197 }
1198
1199 uctrl->host_tx_pkt_len = 0;
1200 uctrl->hw_tx_cons++;
1201
1202 return rc;
1203}
1204
1205static void qedi_offload_work(struct work_struct *work)
1206{
1207 struct qedi_endpoint *qedi_ep =
1208 container_of(work, struct qedi_endpoint, offload_work);
1209 struct qedi_ctx *qedi;
1210 int wait_delay = 5 * HZ;
1211 int ret;
1212
1213 qedi = qedi_ep->qedi;
1214
1215 ret = qedi_iscsi_offload_conn(qedi_ep);
1216 if (ret) {
1217 QEDI_ERR(&qedi->dbg_ctx,
1218 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1219 qedi_ep->iscsi_cid, qedi_ep, ret);
1220 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1221 return;
1222 }
1223
1224 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1225 (qedi_ep->state ==
1226 EP_STATE_OFLDCONN_COMPL),
1227 wait_delay);
1228 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1229 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1230 QEDI_ERR(&qedi->dbg_ctx,
1231 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1232 qedi_ep->iscsi_cid, qedi_ep);
1233 }
1234}
1235
1236static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1237{
1238 struct qedi_ctx *qedi;
1239 struct qedi_endpoint *qedi_ep;
1240 int ret = 0;
1241 u32 iscsi_cid;
1242 u16 port_id = 0;
1243
1244 if (!shost) {
1245 ret = -ENXIO;
1246 QEDI_ERR(NULL, "shost is NULL\n");
1247 return ret;
1248 }
1249
1250 if (strcmp(shost->hostt->proc_name, "qedi")) {
1251 ret = -ENXIO;
1252 QEDI_ERR(NULL, "shost %s is invalid\n",
1253 shost->hostt->proc_name);
1254 return ret;
1255 }
1256
1257 qedi = iscsi_host_priv(shost);
1258 if (path_data->handle == QEDI_PATH_HANDLE) {
1259 ret = qedi_data_avail(qedi, path_data->vlan_id);
1260 goto set_path_exit;
1261 }
1262
1263 iscsi_cid = (u32)path_data->handle;
1264 if (iscsi_cid >= qedi->max_active_conns) {
1265 ret = -EINVAL;
1266 goto set_path_exit;
1267 }
1268 qedi_ep = qedi->ep_tbl[iscsi_cid];
1269 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1270 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
1271 if (!qedi_ep) {
1272 ret = -EINVAL;
1273 goto set_path_exit;
1274 }
1275
1276 if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
1277 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
1278 qedi_ep->state = EP_STATE_OFLDCONN_NONE;
1279 ret = -EIO;
1280 goto set_path_exit;
1281 }
1282
1283 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
1284 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
1285
1286 qedi_ep->vlan_id = path_data->vlan_id;
1287 if (path_data->pmtu < DEF_PATH_MTU) {
1288 qedi_ep->pmtu = qedi->ll2_mtu;
1289 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1290 "MTU cannot be %u, using default MTU %u\n",
1291 path_data->pmtu, qedi_ep->pmtu);
1292 }
1293
1294 if (path_data->pmtu != qedi->ll2_mtu) {
1295 if (path_data->pmtu > JUMBO_MTU) {
1296 ret = -EINVAL;
1297 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
1298 goto set_path_exit;
1299 }
1300
1301 qedi_reset_host_mtu(qedi, path_data->pmtu);
1302 qedi_ep->pmtu = qedi->ll2_mtu;
1303 }
1304
1305 port_id = qedi_ep->src_port;
1306 if (port_id >= QEDI_LOCAL_PORT_MIN &&
1307 port_id < QEDI_LOCAL_PORT_MAX) {
1308 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
1309 port_id = 0;
1310 } else {
1311 port_id = 0;
1312 }
1313
1314 if (!port_id) {
1315 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
1316 if (port_id == QEDI_LOCAL_PORT_INVALID) {
1317 QEDI_ERR(&qedi->dbg_ctx,
1318 "Failed to allocate port id for iscsi_cid=0x%x\n",
1319 iscsi_cid);
1320 ret = -ENOMEM;
1321 goto set_path_exit;
1322 }
1323 }
1324
1325 qedi_ep->src_port = port_id;
1326
1327 if (qedi_ep->ip_type == TCP_IPV4) {
1328 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
1329 sizeof(struct in_addr));
1330 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
1331 sizeof(struct in_addr));
1332 qedi->ip_type = TCP_IPV4;
1333
1334 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1335 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
1336 qedi_ep->src_addr, qedi_ep->src_port,
1337 qedi_ep->dst_addr, qedi_ep->dst_port);
1338 } else {
1339 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
1340 sizeof(struct in6_addr));
1341 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
1342 sizeof(struct in6_addr));
1343 qedi->ip_type = TCP_IPV6;
1344
1345 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1346 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
1347 qedi_ep->src_addr, qedi_ep->src_port,
1348 qedi_ep->dst_addr, qedi_ep->dst_port);
1349 }
1350
1351 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
1352 queue_work(qedi->offload_thread, &qedi_ep->offload_work);
1353
1354 ret = 0;
1355
1356set_path_exit:
1357 return ret;
1358}
1359
1360static umode_t qedi_attr_is_visible(int param_type, int param)
1361{
1362 switch (param_type) {
1363 case ISCSI_HOST_PARAM:
1364 switch (param) {
1365 case ISCSI_HOST_PARAM_NETDEV_NAME:
1366 case ISCSI_HOST_PARAM_HWADDRESS:
1367 case ISCSI_HOST_PARAM_IPADDRESS:
1368 return 0444;
1369 default:
1370 return 0;
1371 }
1372 case ISCSI_PARAM:
1373 switch (param) {
1374 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1375 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1376 case ISCSI_PARAM_HDRDGST_EN:
1377 case ISCSI_PARAM_DATADGST_EN:
1378 case ISCSI_PARAM_CONN_ADDRESS:
1379 case ISCSI_PARAM_CONN_PORT:
1380 case ISCSI_PARAM_EXP_STATSN:
1381 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1382 case ISCSI_PARAM_PERSISTENT_PORT:
1383 case ISCSI_PARAM_PING_TMO:
1384 case ISCSI_PARAM_RECV_TMO:
1385 case ISCSI_PARAM_INITIAL_R2T_EN:
1386 case ISCSI_PARAM_MAX_R2T:
1387 case ISCSI_PARAM_IMM_DATA_EN:
1388 case ISCSI_PARAM_FIRST_BURST:
1389 case ISCSI_PARAM_MAX_BURST:
1390 case ISCSI_PARAM_PDU_INORDER_EN:
1391 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1392 case ISCSI_PARAM_ERL:
1393 case ISCSI_PARAM_TARGET_NAME:
1394 case ISCSI_PARAM_TPGT:
1395 case ISCSI_PARAM_USERNAME:
1396 case ISCSI_PARAM_PASSWORD:
1397 case ISCSI_PARAM_USERNAME_IN:
1398 case ISCSI_PARAM_PASSWORD_IN:
1399 case ISCSI_PARAM_FAST_ABORT:
1400 case ISCSI_PARAM_ABORT_TMO:
1401 case ISCSI_PARAM_LU_RESET_TMO:
1402 case ISCSI_PARAM_TGT_RESET_TMO:
1403 case ISCSI_PARAM_IFACE_NAME:
1404 case ISCSI_PARAM_INITIATOR_NAME:
1405 case ISCSI_PARAM_BOOT_ROOT:
1406 case ISCSI_PARAM_BOOT_NIC:
1407 case ISCSI_PARAM_BOOT_TARGET:
1408 return 0444;
1409 default:
1410 return 0;
1411 }
1412 }
1413
1414 return 0;
1415}
1416
1417static void qedi_cleanup_task(struct iscsi_task *task)
1418{
1419 struct qedi_cmd *cmd;
1420
1421 if (task->state == ISCSI_TASK_PENDING) {
1422 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
1423 refcount_read(&task->refcount));
1424 return;
1425 }
1426
1427 if (task->sc)
1428 qedi_iscsi_unmap_sg_list(task->dd_data);
1429
1430 cmd = task->dd_data;
1431 if (cmd->task_id != U16_MAX)
1432 qedi_clear_task_idx(iscsi_host_priv(task->conn->session->host),
1433 cmd->task_id);
1434
1435 cmd->task_id = U16_MAX;
1436 cmd->scsi_cmd = NULL;
1437}
1438
1439struct iscsi_transport qedi_iscsi_transport = {
1440 .owner = THIS_MODULE,
1441 .name = QEDI_MODULE_NAME,
1442 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
1443 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
1444 .create_session = qedi_session_create,
1445 .destroy_session = qedi_session_destroy,
1446 .create_conn = qedi_conn_create,
1447 .bind_conn = qedi_conn_bind,
1448 .unbind_conn = iscsi_conn_unbind,
1449 .start_conn = qedi_conn_start,
1450 .stop_conn = iscsi_conn_stop,
1451 .destroy_conn = qedi_conn_destroy,
1452 .set_param = iscsi_set_param,
1453 .get_ep_param = qedi_ep_get_param,
1454 .get_conn_param = iscsi_conn_get_param,
1455 .get_session_param = iscsi_session_get_param,
1456 .get_host_param = qedi_host_get_param,
1457 .send_pdu = iscsi_conn_send_pdu,
1458 .get_stats = qedi_conn_get_stats,
1459 .xmit_task = qedi_task_xmit,
1460 .cleanup_task = qedi_cleanup_task,
1461 .session_recovery_timedout = iscsi_session_recovery_timedout,
1462 .ep_connect = qedi_ep_connect,
1463 .ep_poll = qedi_ep_poll,
1464 .ep_disconnect = qedi_ep_disconnect,
1465 .set_path = qedi_set_path,
1466 .attr_is_visible = qedi_attr_is_visible,
1467};
1468
1469void qedi_start_conn_recovery(struct qedi_ctx *qedi,
1470 struct qedi_conn *qedi_conn)
1471{
1472 struct iscsi_cls_session *cls_sess;
1473 struct iscsi_cls_conn *cls_conn;
1474 struct iscsi_conn *conn;
1475
1476 cls_conn = qedi_conn->cls_conn;
1477 conn = cls_conn->dd_data;
1478 cls_sess = iscsi_conn_to_session(cls_conn);
1479
1480 if (iscsi_is_session_online(cls_sess)) {
1481 qedi_conn->abrt_conn = 1;
1482 QEDI_ERR(&qedi->dbg_ctx,
1483 "Failing connection, state=0x%x, cid=0x%x\n",
1484 conn->session->state, qedi_conn->iscsi_conn_id);
1485 iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
1486 ISCSI_ERR_CONN_FAILED);
1487 }
1488}
1489
1490static const struct {
1491 enum iscsi_error_types error_code;
1492 char *err_string;
1493} qedi_iscsi_error[] = {
1494 { ISCSI_STATUS_NONE,
1495 "tcp_error none"
1496 },
1497 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
1498 "task cid mismatch"
1499 },
1500 { ISCSI_CONN_ERROR_TASK_NOT_VALID,
1501 "invalid task"
1502 },
1503 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
1504 "rq ring full"
1505 },
1506 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
1507 "cmdq ring full"
1508 },
1509 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
1510 "sge caching failed"
1511 },
1512 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
1513 "hdr digest error"
1514 },
1515 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
1516 "local cmpl error"
1517 },
1518 { ISCSI_CONN_ERROR_DATA_OVERRUN,
1519 "invalid task"
1520 },
1521 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
1522 "out of sge error"
1523 },
1524 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
1525 "tcp ip fragment error"
1526 },
1527 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
1528 "AHS len protocol error"
1529 },
1530 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
1531 "itt out of range error"
1532 },
1533 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
1534 "data seg more than pdu size"
1535 },
1536 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
1537 "invalid opcode"
1538 },
1539 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
1540 "invalid opcode before update"
1541 },
1542 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
1543 "unexpected opcode"
1544 },
1545 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
1546 "r2t carries no data"
1547 },
1548 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
1549 "data sn error"
1550 },
1551 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
1552 "data TTT error"
1553 },
1554 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
1555 "r2t TTT error"
1556 },
1557 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
1558 "buffer offset error"
1559 },
1560 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
1561 "buffer offset ooo"
1562 },
1563 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
1564 "data seg len 0"
1565 },
1566 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
1567 "data xer len error"
1568 },
1569 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
1570 "data xer len1 error"
1571 },
1572 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
1573 "data xer len2 error"
1574 },
1575 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
1576 "protocol lun error"
1577 },
1578 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
1579 "f bit zero error"
1580 },
1581 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
1582 "exp stat sn error"
1583 },
1584 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
1585 "dsl not zero error"
1586 },
1587 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
1588 "invalid dsl"
1589 },
1590 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
1591 "data seg len too big"
1592 },
1593 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
1594 "outstanding r2t count error"
1595 },
1596 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
1597 "sense datalen error"
1598 },
1599};
1600
1601static char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
1602{
1603 int i;
1604 char *msg = NULL;
1605
1606 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
1607 if (qedi_iscsi_error[i].error_code == err_code) {
1608 msg = qedi_iscsi_error[i].err_string;
1609 break;
1610 }
1611 }
1612 return msg;
1613}
1614
1615void qedi_process_iscsi_error(struct qedi_endpoint *ep,
1616 struct iscsi_eqe_data *data)
1617{
1618 struct qedi_conn *qedi_conn;
1619 struct qedi_ctx *qedi;
1620 char warn_notice[] = "iscsi_warning";
1621 char error_notice[] = "iscsi_error";
1622 char unknown_msg[] = "Unknown error";
1623 char *message;
1624 int need_recovery = 0;
1625 u32 err_mask = 0;
1626 char *msg;
1627
1628 if (!ep)
1629 return;
1630
1631 qedi_conn = ep->conn;
1632 if (!qedi_conn)
1633 return;
1634
1635 qedi = ep->qedi;
1636
1637 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
1638 data->error_code);
1639
1640 if (err_mask) {
1641 need_recovery = 0;
1642 message = warn_notice;
1643 } else {
1644 need_recovery = 1;
1645 message = error_notice;
1646 }
1647
1648 msg = qedi_get_iscsi_error(data->error_code);
1649 if (!msg) {
1650 need_recovery = 0;
1651 msg = unknown_msg;
1652 }
1653
1654 iscsi_conn_printk(KERN_ALERT,
1655 qedi_conn->cls_conn->dd_data,
1656 "qedi: %s - %s\n", message, msg);
1657
1658 if (need_recovery)
1659 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1660}
1661
1662void qedi_process_tcp_error(struct qedi_endpoint *ep,
1663 struct iscsi_eqe_data *data)
1664{
1665 struct qedi_conn *qedi_conn;
1666
1667 if (!ep)
1668 return;
1669
1670 qedi_conn = ep->conn;
1671 if (!qedi_conn)
1672 return;
1673
1674 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
1675 data->error_code);
1676
1677 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1678}
1679
