1
2
3
4
5
6
7
8
9
10#include <linux/blkdev.h>
11#include <linux/etherdevice.h>
12#include <linux/if_ether.h>
13#include <linux/if_vlan.h>
14#include <scsi/scsi_tcq.h>
15
16#include "qedi.h"
17#include "qedi_iscsi.h"
18#include "qedi_gbl.h"
19
20int qedi_recover_all_conns(struct qedi_ctx *qedi)
21{
22 struct qedi_conn *qedi_conn;
23 int i;
24
25 for (i = 0; i < qedi->max_active_conns; i++) {
26 qedi_conn = qedi_get_conn_from_id(qedi, i);
27 if (!qedi_conn)
28 continue;
29
30 qedi_start_conn_recovery(qedi, qedi_conn);
31 }
32
33 return SUCCESS;
34}
35
36static int qedi_eh_host_reset(struct scsi_cmnd *cmd)
37{
38 struct Scsi_Host *shost = cmd->device->host;
39 struct qedi_ctx *qedi;
40
41 qedi = iscsi_host_priv(shost);
42
43 return qedi_recover_all_conns(qedi);
44}
45
46struct scsi_host_template qedi_host_template = {
47 .module = THIS_MODULE,
48 .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver",
49 .proc_name = QEDI_MODULE_NAME,
50 .queuecommand = iscsi_queuecommand,
51 .eh_abort_handler = iscsi_eh_abort,
52 .eh_device_reset_handler = iscsi_eh_device_reset,
53 .eh_target_reset_handler = iscsi_eh_recover_target,
54 .eh_host_reset_handler = qedi_eh_host_reset,
55 .target_alloc = iscsi_target_alloc,
56 .change_queue_depth = iscsi_change_queue_depth,
57 .can_queue = QEDI_MAX_ISCSI_TASK,
58 .this_id = -1,
59 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD,
60 .max_sectors = 0xffff,
61 .dma_boundary = QEDI_HW_DMA_BOUNDARY,
62 .cmd_per_lun = 128,
63 .use_clustering = ENABLE_CLUSTERING,
64 .shost_attrs = qedi_shost_attrs,
65};
66
67static void qedi_conn_free_login_resources(struct qedi_ctx *qedi,
68 struct qedi_conn *qedi_conn)
69{
70 if (qedi_conn->gen_pdu.resp_bd_tbl) {
71 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
72 qedi_conn->gen_pdu.resp_bd_tbl,
73 qedi_conn->gen_pdu.resp_bd_dma);
74 qedi_conn->gen_pdu.resp_bd_tbl = NULL;
75 }
76
77 if (qedi_conn->gen_pdu.req_bd_tbl) {
78 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
79 qedi_conn->gen_pdu.req_bd_tbl,
80 qedi_conn->gen_pdu.req_bd_dma);
81 qedi_conn->gen_pdu.req_bd_tbl = NULL;
82 }
83
84 if (qedi_conn->gen_pdu.resp_buf) {
85 dma_free_coherent(&qedi->pdev->dev,
86 ISCSI_DEF_MAX_RECV_SEG_LEN,
87 qedi_conn->gen_pdu.resp_buf,
88 qedi_conn->gen_pdu.resp_dma_addr);
89 qedi_conn->gen_pdu.resp_buf = NULL;
90 }
91
92 if (qedi_conn->gen_pdu.req_buf) {
93 dma_free_coherent(&qedi->pdev->dev,
94 ISCSI_DEF_MAX_RECV_SEG_LEN,
95 qedi_conn->gen_pdu.req_buf,
96 qedi_conn->gen_pdu.req_dma_addr);
97 qedi_conn->gen_pdu.req_buf = NULL;
98 }
99}
100
101static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi,
102 struct qedi_conn *qedi_conn)
103{
104 qedi_conn->gen_pdu.req_buf =
105 dma_alloc_coherent(&qedi->pdev->dev,
106 ISCSI_DEF_MAX_RECV_SEG_LEN,
107 &qedi_conn->gen_pdu.req_dma_addr,
108 GFP_KERNEL);
109 if (!qedi_conn->gen_pdu.req_buf)
110 goto login_req_buf_failure;
111
112 qedi_conn->gen_pdu.req_buf_size = 0;
113 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf;
114
115 qedi_conn->gen_pdu.resp_buf =
116 dma_alloc_coherent(&qedi->pdev->dev,
117 ISCSI_DEF_MAX_RECV_SEG_LEN,
118 &qedi_conn->gen_pdu.resp_dma_addr,
119 GFP_KERNEL);
120 if (!qedi_conn->gen_pdu.resp_buf)
121 goto login_resp_buf_failure;
122
123 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
124 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf;
125
126 qedi_conn->gen_pdu.req_bd_tbl =
127 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
128 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
129 if (!qedi_conn->gen_pdu.req_bd_tbl)
130 goto login_req_bd_tbl_failure;
131
132 qedi_conn->gen_pdu.resp_bd_tbl =
133 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
134 &qedi_conn->gen_pdu.resp_bd_dma,
135 GFP_KERNEL);
136 if (!qedi_conn->gen_pdu.resp_bd_tbl)
137 goto login_resp_bd_tbl_failure;
138
139 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS,
140 "Allocation successful, cid=0x%x\n",
141 qedi_conn->iscsi_conn_id);
142 return 0;
143
144login_resp_bd_tbl_failure:
145 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
146 qedi_conn->gen_pdu.req_bd_tbl,
147 qedi_conn->gen_pdu.req_bd_dma);
148 qedi_conn->gen_pdu.req_bd_tbl = NULL;
149
150login_req_bd_tbl_failure:
151 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
152 qedi_conn->gen_pdu.resp_buf,
153 qedi_conn->gen_pdu.resp_dma_addr);
154 qedi_conn->gen_pdu.resp_buf = NULL;
155login_resp_buf_failure:
156 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
157 qedi_conn->gen_pdu.req_buf,
158 qedi_conn->gen_pdu.req_dma_addr);
159 qedi_conn->gen_pdu.req_buf = NULL;
160login_req_buf_failure:
161 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data,
162 "login resource alloc failed!!\n");
163 return -ENOMEM;
164}
165
166static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi,
167 struct iscsi_session *session)
168{
169 int i;
170
171 for (i = 0; i < session->cmds_max; i++) {
172 struct iscsi_task *task = session->cmds[i];
173 struct qedi_cmd *cmd = task->dd_data;
174
175 if (cmd->io_tbl.sge_tbl)
176 dma_free_coherent(&qedi->pdev->dev,
177 QEDI_ISCSI_MAX_BDS_PER_CMD *
178 sizeof(struct scsi_sge),
179 cmd->io_tbl.sge_tbl,
180 cmd->io_tbl.sge_tbl_dma);
181
182 if (cmd->sense_buffer)
183 dma_free_coherent(&qedi->pdev->dev,
184 SCSI_SENSE_BUFFERSIZE,
185 cmd->sense_buffer,
186 cmd->sense_buffer_dma);
187 }
188}
189
190static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session,
191 struct qedi_cmd *cmd)
192{
193 struct qedi_io_bdt *io = &cmd->io_tbl;
194 struct scsi_sge *sge;
195
196 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev,
197 QEDI_ISCSI_MAX_BDS_PER_CMD *
198 sizeof(*sge),
199 &io->sge_tbl_dma, GFP_KERNEL);
200 if (!io->sge_tbl) {
201 iscsi_session_printk(KERN_ERR, session,
202 "Could not allocate BD table.\n");
203 return -ENOMEM;
204 }
205
206 io->sge_valid = 0;
207 return 0;
208}
209
210static int qedi_setup_cmd_pool(struct qedi_ctx *qedi,
211 struct iscsi_session *session)
212{
213 int i;
214
215 for (i = 0; i < session->cmds_max; i++) {
216 struct iscsi_task *task = session->cmds[i];
217 struct qedi_cmd *cmd = task->dd_data;
218
219 task->hdr = &cmd->hdr;
220 task->hdr_max = sizeof(struct iscsi_hdr);
221
222 if (qedi_alloc_sget(qedi, session, cmd))
223 goto free_sgets;
224
225 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev,
226 SCSI_SENSE_BUFFERSIZE,
227 &cmd->sense_buffer_dma,
228 GFP_KERNEL);
229 if (!cmd->sense_buffer)
230 goto free_sgets;
231 }
232
233 return 0;
234
235free_sgets:
236 qedi_destroy_cmd_pool(qedi, session);
237 return -ENOMEM;
238}
239
240static struct iscsi_cls_session *
241qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max,
242 u16 qdepth, uint32_t initial_cmdsn)
243{
244 struct Scsi_Host *shost;
245 struct iscsi_cls_session *cls_session;
246 struct qedi_ctx *qedi;
247 struct qedi_endpoint *qedi_ep;
248
249 if (!ep)
250 return NULL;
251
252 qedi_ep = ep->dd_data;
253 shost = qedi_ep->qedi->shost;
254 qedi = iscsi_host_priv(shost);
255
256 if (cmds_max > qedi->max_sqes)
257 cmds_max = qedi->max_sqes;
258 else if (cmds_max < QEDI_SQ_WQES_MIN)
259 cmds_max = QEDI_SQ_WQES_MIN;
260
261 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost,
262 cmds_max, 0, sizeof(struct qedi_cmd),
263 initial_cmdsn, ISCSI_MAX_TARGET);
264 if (!cls_session) {
265 QEDI_ERR(&qedi->dbg_ctx,
266 "Failed to setup session for ep=%p\n", qedi_ep);
267 return NULL;
268 }
269
270 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) {
271 QEDI_ERR(&qedi->dbg_ctx,
272 "Failed to setup cmd pool for ep=%p\n", qedi_ep);
273 goto session_teardown;
274 }
275
276 return cls_session;
277
278session_teardown:
279 iscsi_session_teardown(cls_session);
280 return NULL;
281}
282
283static void qedi_session_destroy(struct iscsi_cls_session *cls_session)
284{
285 struct iscsi_session *session = cls_session->dd_data;
286 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
287 struct qedi_ctx *qedi = iscsi_host_priv(shost);
288
289 qedi_destroy_cmd_pool(qedi, session);
290 iscsi_session_teardown(cls_session);
291}
292
293static struct iscsi_cls_conn *
294qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
295{
296 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
297 struct qedi_ctx *qedi = iscsi_host_priv(shost);
298 struct iscsi_cls_conn *cls_conn;
299 struct qedi_conn *qedi_conn;
300 struct iscsi_conn *conn;
301
302 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn),
303 cid);
304 if (!cls_conn) {
305 QEDI_ERR(&qedi->dbg_ctx,
306 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n",
307 cid, cls_session);
308 return NULL;
309 }
310
311 conn = cls_conn->dd_data;
312 qedi_conn = conn->dd_data;
313 qedi_conn->cls_conn = cls_conn;
314 qedi_conn->qedi = qedi;
315 qedi_conn->ep = NULL;
316 qedi_conn->active_cmd_count = 0;
317 INIT_LIST_HEAD(&qedi_conn->active_cmd_list);
318 spin_lock_init(&qedi_conn->list_lock);
319
320 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) {
321 iscsi_conn_printk(KERN_ALERT, conn,
322 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n",
323 cid, cls_session);
324 goto free_conn;
325 }
326
327 return cls_conn;
328
329free_conn:
330 iscsi_conn_teardown(cls_conn);
331 return NULL;
332}
333
334void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
335{
336 iscsi_block_session(cls_session);
337}
338
339void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
340{
341 iscsi_unblock_session(cls_session);
342}
343
344static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi,
345 struct qedi_conn *qedi_conn)
346{
347 u32 iscsi_cid = qedi_conn->iscsi_conn_id;
348
349 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) {
350 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
351 "conn bind - entry #%d not free\n",
352 iscsi_cid);
353 return -EBUSY;
354 }
355
356 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn;
357 return 0;
358}
359
360struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid)
361{
362 if (!qedi->cid_que.conn_cid_tbl) {
363 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n");
364 return NULL;
365
366 } else if (iscsi_cid >= qedi->max_active_conns) {
367 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid);
368 return NULL;
369 }
370 return qedi->cid_que.conn_cid_tbl[iscsi_cid];
371}
372
373static int qedi_conn_bind(struct iscsi_cls_session *cls_session,
374 struct iscsi_cls_conn *cls_conn,
375 u64 transport_fd, int is_leading)
376{
377 struct iscsi_conn *conn = cls_conn->dd_data;
378 struct qedi_conn *qedi_conn = conn->dd_data;
379 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
380 struct qedi_ctx *qedi = iscsi_host_priv(shost);
381 struct qedi_endpoint *qedi_ep;
382 struct iscsi_endpoint *ep;
383
384 ep = iscsi_lookup_endpoint(transport_fd);
385 if (!ep)
386 return -EINVAL;
387
388 qedi_ep = ep->dd_data;
389 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) ||
390 (qedi_ep->state == EP_STATE_TCP_RST_RCVD))
391 return -EINVAL;
392
393 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
394 return -EINVAL;
395
396 qedi_ep->conn = qedi_conn;
397 qedi_conn->ep = qedi_ep;
398 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
399 qedi_conn->fw_cid = qedi_ep->fw_cid;
400 qedi_conn->cmd_cleanup_req = 0;
401 qedi_conn->cmd_cleanup_cmpl = 0;
402
403 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn))
404 return -EINVAL;
405
406 spin_lock_init(&qedi_conn->tmf_work_lock);
407 INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
408 init_waitqueue_head(&qedi_conn->wait_queue);
409 return 0;
410}
411
412static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
413 struct qedi_conn *qedi_conn)
414{
415 struct qed_iscsi_params_update *conn_info;
416 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
417 struct iscsi_conn *conn = cls_conn->dd_data;
418 struct qedi_endpoint *qedi_ep;
419 int rval;
420
421 qedi_ep = qedi_conn->ep;
422
423 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
424 if (!conn_info) {
425 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
426 return -ENOMEM;
427 }
428
429 conn_info->update_flag = 0;
430
431 if (conn->hdrdgst_en)
432 SET_FIELD(conn_info->update_flag,
433 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
434 if (conn->datadgst_en)
435 SET_FIELD(conn_info->update_flag,
436 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
437 if (conn->session->initial_r2t_en)
438 SET_FIELD(conn_info->update_flag,
439 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
440 true);
441 if (conn->session->imm_data_en)
442 SET_FIELD(conn_info->update_flag,
443 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
444 true);
445
446 conn_info->max_seq_size = conn->session->max_burst;
447 conn_info->max_recv_pdu_length = conn->max_recv_dlength;
448 conn_info->max_send_pdu_length = conn->max_xmit_dlength;
449 conn_info->first_seq_length = conn->session->first_burst;
450 conn_info->exp_stat_sn = conn->exp_statsn;
451
452 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
453 conn_info);
454 if (rval) {
455 rval = -ENXIO;
456 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
457 }
458
459 kfree(conn_info);
460 return rval;
461}
462
463static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
464{
465 u16 mss = 0;
466 u16 hdrs = TCP_HDR_LEN;
467
468 if (is_ipv6)
469 hdrs += IPV6_HDR_LEN;
470 else
471 hdrs += IPV4_HDR_LEN;
472
473 if (vlan_en)
474 hdrs += VLAN_LEN;
475
476 mss = pmtu - hdrs;
477
478 if (tcp_ts_en)
479 mss -= TCP_OPTION_LEN;
480
481 if (!mss)
482 mss = DEF_MSS;
483
484 return mss;
485}
486
487static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
488{
489 struct qedi_ctx *qedi = qedi_ep->qedi;
490 struct qed_iscsi_params_offload *conn_info;
491 int rval;
492 int i;
493
494 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
495 if (!conn_info) {
496 QEDI_ERR(&qedi->dbg_ctx,
497 "Failed to allocate memory ep=%p\n", qedi_ep);
498 return -ENOMEM;
499 }
500
501 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
502 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
503
504 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
505 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
506
507 if (qedi_ep->ip_type == TCP_IPV4) {
508 conn_info->ip_version = 0;
509 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
510 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
511 qedi_ep->src_addr, qedi_ep->dst_addr);
512 } else {
513 for (i = 1; i < 4; i++) {
514 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
515 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
516 }
517
518 conn_info->ip_version = 1;
519 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
520 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
521 qedi_ep->src_addr, qedi_ep->dst_addr);
522 }
523
524 conn_info->src.port = qedi_ep->src_port;
525 conn_info->dst.port = qedi_ep->dst_port;
526
527 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
528 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
529 conn_info->vlan_id = qedi_ep->vlan_id;
530
531 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
532 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
533 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
534 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
535
536 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues);
537
538 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
539 conn_info->dup_ack_theshold = 3;
540 conn_info->rcv_wnd = 65535;
541
542 conn_info->ss_thresh = 65535;
543 conn_info->srtt = 300;
544 conn_info->rtt_var = 150;
545 conn_info->flow_label = 0;
546 conn_info->ka_timeout = DEF_KA_TIMEOUT;
547 conn_info->ka_interval = DEF_KA_INTERVAL;
548 conn_info->max_rt_time = DEF_MAX_RT_TIME;
549 conn_info->ttl = DEF_TTL;
550 conn_info->tos_or_tc = DEF_TOS;
551 conn_info->remote_port = qedi_ep->dst_port;
552 conn_info->local_port = qedi_ep->src_port;
553
554 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
555 (qedi_ep->ip_type == TCP_IPV6),
556 1, (qedi_ep->vlan_id != 0));
557
558 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss;
559 conn_info->rcv_wnd_scale = 4;
560 conn_info->da_timeout_value = 200;
561 conn_info->ack_frequency = 2;
562
563 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
564 "Default cq index [%d], mss [%d]\n",
565 conn_info->default_cq, conn_info->mss);
566
567 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
568 if (rval)
569 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
570 rval, qedi_ep);
571
572 kfree(conn_info);
573 return rval;
574}
575
576static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
577{
578 struct iscsi_conn *conn = cls_conn->dd_data;
579 struct qedi_conn *qedi_conn = conn->dd_data;
580 struct qedi_ctx *qedi;
581 int rval;
582
583 qedi = qedi_conn->qedi;
584
585 rval = qedi_iscsi_update_conn(qedi, qedi_conn);
586 if (rval) {
587 iscsi_conn_printk(KERN_ALERT, conn,
588 "conn_start: FW oflload conn failed.\n");
589 rval = -EINVAL;
590 goto start_err;
591 }
592
593 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
594 qedi_conn->abrt_conn = 0;
595
596 rval = iscsi_conn_start(cls_conn);
597 if (rval) {
598 iscsi_conn_printk(KERN_ALERT, conn,
599 "iscsi_conn_start: FW oflload conn failed!!\n");
600 }
601
602start_err:
603 return rval;
604}
605
606static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
607{
608 struct iscsi_conn *conn = cls_conn->dd_data;
609 struct qedi_conn *qedi_conn = conn->dd_data;
610 struct Scsi_Host *shost;
611 struct qedi_ctx *qedi;
612
613 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
614 qedi = iscsi_host_priv(shost);
615
616 qedi_conn_free_login_resources(qedi, qedi_conn);
617 iscsi_conn_teardown(cls_conn);
618}
619
620static int qedi_ep_get_param(struct iscsi_endpoint *ep,
621 enum iscsi_param param, char *buf)
622{
623 struct qedi_endpoint *qedi_ep = ep->dd_data;
624 int len;
625
626 if (!qedi_ep)
627 return -ENOTCONN;
628
629 switch (param) {
630 case ISCSI_PARAM_CONN_PORT:
631 len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
632 break;
633 case ISCSI_PARAM_CONN_ADDRESS:
634 if (qedi_ep->ip_type == TCP_IPV4)
635 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
636 else
637 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
638 break;
639 default:
640 return -ENOTCONN;
641 }
642
643 return len;
644}
645
646static int qedi_host_get_param(struct Scsi_Host *shost,
647 enum iscsi_host_param param, char *buf)
648{
649 struct qedi_ctx *qedi;
650 int len;
651
652 qedi = iscsi_host_priv(shost);
653
654 switch (param) {
655 case ISCSI_HOST_PARAM_HWADDRESS:
656 len = sysfs_format_mac(buf, qedi->mac, 6);
657 break;
658 case ISCSI_HOST_PARAM_NETDEV_NAME:
659 len = sprintf(buf, "host%d\n", shost->host_no);
660 break;
661 case ISCSI_HOST_PARAM_IPADDRESS:
662 if (qedi->ip_type == TCP_IPV4)
663 len = sprintf(buf, "%pI4\n", qedi->src_ip);
664 else
665 len = sprintf(buf, "%pI6\n", qedi->src_ip);
666 break;
667 default:
668 return iscsi_host_get_param(shost, param, buf);
669 }
670
671 return len;
672}
673
674static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
675 struct iscsi_stats *stats)
676{
677 struct iscsi_conn *conn = cls_conn->dd_data;
678 struct qed_iscsi_stats iscsi_stats;
679 struct Scsi_Host *shost;
680 struct qedi_ctx *qedi;
681
682 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
683 qedi = iscsi_host_priv(shost);
684 qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
685
686 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
687 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
688 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
689 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
690 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
691
692 stats->txdata_octets = conn->txdata_octets;
693 stats->rxdata_octets = conn->rxdata_octets;
694 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
695 stats->dataout_pdus = conn->dataout_pdus_cnt;
696 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
697 stats->datain_pdus = conn->datain_pdus_cnt;
698 stats->r2t_pdus = conn->r2t_pdus_cnt;
699 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
700 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
701 stats->digest_err = 0;
702 stats->timeout_err = 0;
703 strcpy(stats->custom[0].desc, "eh_abort_cnt");
704 stats->custom[0].value = conn->eh_abort_cnt;
705 stats->custom_length = 1;
706}
707
708static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
709{
710 struct scsi_sge *bd_tbl;
711
712 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
713
714 bd_tbl->sge_addr.hi =
715 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
716 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
717 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
718 qedi_conn->gen_pdu.req_buf;
719 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
720 bd_tbl->sge_addr.hi =
721 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
722 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
723 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
724}
725
726static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
727{
728 struct qedi_cmd *cmd = task->dd_data;
729 struct qedi_conn *qedi_conn = cmd->conn;
730 char *buf;
731 int data_len;
732 int rc = 0;
733
734 qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
735 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
736 case ISCSI_OP_LOGIN:
737 qedi_send_iscsi_login(qedi_conn, task);
738 break;
739 case ISCSI_OP_NOOP_OUT:
740 data_len = qedi_conn->gen_pdu.req_buf_size;
741 buf = qedi_conn->gen_pdu.req_buf;
742 if (data_len)
743 rc = qedi_send_iscsi_nopout(qedi_conn, task,
744 buf, data_len, 1);
745 else
746 rc = qedi_send_iscsi_nopout(qedi_conn, task,
747 NULL, 0, 1);
748 break;
749 case ISCSI_OP_LOGOUT:
750 rc = qedi_send_iscsi_logout(qedi_conn, task);
751 break;
752 case ISCSI_OP_SCSI_TMFUNC:
753 rc = qedi_iscsi_abort_work(qedi_conn, task);
754 break;
755 case ISCSI_OP_TEXT:
756 rc = qedi_send_iscsi_text(qedi_conn, task);
757 break;
758 default:
759 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
760 "unsupported op 0x%x\n", task->hdr->opcode);
761 }
762
763 return rc;
764}
765
766static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
767{
768 struct qedi_conn *qedi_conn = conn->dd_data;
769 struct qedi_cmd *cmd = task->dd_data;
770
771 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
772
773 qedi_conn->gen_pdu.req_buf_size = task->data_count;
774
775 if (task->data_count) {
776 memcpy(qedi_conn->gen_pdu.req_buf, task->data,
777 task->data_count);
778 qedi_conn->gen_pdu.req_wr_ptr =
779 qedi_conn->gen_pdu.req_buf + task->data_count;
780 }
781
782 cmd->conn = conn->dd_data;
783 cmd->scsi_cmd = NULL;
784 return qedi_iscsi_send_generic_request(task);
785}
786
787static int qedi_task_xmit(struct iscsi_task *task)
788{
789 struct iscsi_conn *conn = task->conn;
790 struct qedi_conn *qedi_conn = conn->dd_data;
791 struct qedi_cmd *cmd = task->dd_data;
792 struct scsi_cmnd *sc = task->sc;
793
794 cmd->state = 0;
795 cmd->task = NULL;
796 cmd->use_slowpath = false;
797 cmd->conn = qedi_conn;
798 cmd->task = task;
799 cmd->io_cmd_in_list = false;
800 INIT_LIST_HEAD(&cmd->io_cmd);
801
802 if (!sc)
803 return qedi_mtask_xmit(conn, task);
804
805 cmd->scsi_cmd = sc;
806 return qedi_iscsi_send_ioreq(task);
807}
808
809static struct iscsi_endpoint *
810qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
811 int non_blocking)
812{
813 struct qedi_ctx *qedi;
814 struct iscsi_endpoint *ep;
815 struct qedi_endpoint *qedi_ep;
816 struct sockaddr_in *addr;
817 struct sockaddr_in6 *addr6;
818 struct qed_dev *cdev = NULL;
819 struct qedi_uio_dev *udev = NULL;
820 struct iscsi_path path_req;
821 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
822 u32 iscsi_cid = QEDI_CID_RESERVED;
823 u16 len = 0;
824 char *buf = NULL;
825 int ret, tmp;
826
827 if (!shost) {
828 ret = -ENXIO;
829 QEDI_ERR(NULL, "shost is NULL\n");
830 return ERR_PTR(ret);
831 }
832
833 if (do_not_recover) {
834 ret = -ENOMEM;
835 return ERR_PTR(ret);
836 }
837
838 qedi = iscsi_host_priv(shost);
839 cdev = qedi->cdev;
840 udev = qedi->udev;
841
842 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
843 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
844 ret = -ENOMEM;
845 return ERR_PTR(ret);
846 }
847
848 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
849 if (!ep) {
850 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
851 ret = -ENOMEM;
852 return ERR_PTR(ret);
853 }
854 qedi_ep = ep->dd_data;
855 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
856 qedi_ep->state = EP_STATE_IDLE;
857 qedi_ep->iscsi_cid = (u32)-1;
858 qedi_ep->qedi = qedi;
859
860 if (dst_addr->sa_family == AF_INET) {
861 addr = (struct sockaddr_in *)dst_addr;
862 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
863 sizeof(struct in_addr));
864 qedi_ep->dst_port = ntohs(addr->sin_port);
865 qedi_ep->ip_type = TCP_IPV4;
866 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
867 "dst_addr=%pI4, dst_port=%u\n",
868 qedi_ep->dst_addr, qedi_ep->dst_port);
869 } else if (dst_addr->sa_family == AF_INET6) {
870 addr6 = (struct sockaddr_in6 *)dst_addr;
871 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
872 sizeof(struct in6_addr));
873 qedi_ep->dst_port = ntohs(addr6->sin6_port);
874 qedi_ep->ip_type = TCP_IPV6;
875 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
876 "dst_addr=%pI6, dst_port=%u\n",
877 qedi_ep->dst_addr, qedi_ep->dst_port);
878 } else {
879 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
880 }
881
882 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
883 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
884 ret = -ENXIO;
885 goto ep_conn_exit;
886 }
887
888 ret = qedi_alloc_sq(qedi, qedi_ep);
889 if (ret)
890 goto ep_conn_exit;
891
892 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
893 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
894
895 if (ret) {
896 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
897 ret = -ENXIO;
898 goto ep_free_sq;
899 }
900
901 iscsi_cid = qedi_ep->handle;
902 qedi_ep->iscsi_cid = iscsi_cid;
903
904 init_waitqueue_head(&qedi_ep->ofld_wait);
905 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
906 qedi_ep->state = EP_STATE_OFLDCONN_START;
907 qedi->ep_tbl[iscsi_cid] = qedi_ep;
908
909 buf = (char *)&path_req;
910 len = sizeof(path_req);
911 memset(&path_req, 0, len);
912
913 msg_type = ISCSI_KEVENT_PATH_REQ;
914 path_req.handle = (u64)qedi_ep->iscsi_cid;
915 path_req.pmtu = qedi->ll2_mtu;
916 qedi_ep->pmtu = qedi->ll2_mtu;
917 if (qedi_ep->ip_type == TCP_IPV4) {
918 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
919 sizeof(struct in_addr));
920 path_req.ip_addr_len = 4;
921 } else {
922 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
923 sizeof(struct in6_addr));
924 path_req.ip_addr_len = 16;
925 }
926
927 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
928 len);
929 if (ret) {
930 QEDI_ERR(&qedi->dbg_ctx,
931 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
932 iscsi_cid, ret);
933 goto ep_rel_conn;
934 }
935
936 atomic_inc(&qedi->num_offloads);
937 return ep;
938
939ep_rel_conn:
940 qedi->ep_tbl[iscsi_cid] = NULL;
941 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
942 if (tmp)
943 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
944 tmp);
945ep_free_sq:
946 qedi_free_sq(qedi, qedi_ep);
947ep_conn_exit:
948 iscsi_destroy_endpoint(ep);
949 return ERR_PTR(ret);
950}
951
952static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
953{
954 struct qedi_endpoint *qedi_ep;
955 int ret = 0;
956
957 if (do_not_recover)
958 return 1;
959
960 qedi_ep = ep->dd_data;
961 if (qedi_ep->state == EP_STATE_IDLE ||
962 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
963 return -1;
964
965 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
966 ret = 1;
967
968 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
969 QEDI_OFLD_WAIT_STATE(qedi_ep),
970 msecs_to_jiffies(timeout_ms));
971
972 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
973 ret = -1;
974
975 if (ret > 0)
976 return 1;
977 else if (!ret)
978 return 0;
979 else
980 return ret;
981}
982
983static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
984{
985 struct qedi_cmd *cmd, *cmd_tmp;
986
987 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
988 io_cmd) {
989 list_del_init(&cmd->io_cmd);
990 qedi_conn->active_cmd_count--;
991 }
992}
993
994static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
995{
996 struct qedi_endpoint *qedi_ep;
997 struct qedi_conn *qedi_conn = NULL;
998 struct iscsi_conn *conn = NULL;
999 struct qedi_ctx *qedi;
1000 int ret = 0;
1001 int wait_delay = 20 * HZ;
1002 int abrt_conn = 0;
1003 int count = 10;
1004
1005 qedi_ep = ep->dd_data;
1006 qedi = qedi_ep->qedi;
1007
1008 flush_work(&qedi_ep->offload_work);
1009
1010 if (qedi_ep->conn) {
1011 qedi_conn = qedi_ep->conn;
1012 conn = qedi_conn->cls_conn->dd_data;
1013 iscsi_suspend_queue(conn);
1014 abrt_conn = qedi_conn->abrt_conn;
1015
1016 while (count--) {
1017 if (!test_bit(QEDI_CONN_FW_CLEANUP,
1018 &qedi_conn->flags)) {
1019 break;
1020 }
1021 msleep(1000);
1022 }
1023
1024 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
1025 if (do_not_recover) {
1026 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1027 "Do not recover cid=0x%x\n",
1028 qedi_ep->iscsi_cid);
1029 goto ep_exit_recover;
1030 }
1031 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1032 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
1033 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
1034 qedi_cleanup_active_cmd_list(qedi_conn);
1035 goto ep_release_conn;
1036 }
1037 }
1038
1039 if (do_not_recover)
1040 goto ep_exit_recover;
1041
1042 switch (qedi_ep->state) {
1043 case EP_STATE_OFLDCONN_START:
1044 goto ep_release_conn;
1045 case EP_STATE_OFLDCONN_FAILED:
1046 break;
1047 case EP_STATE_OFLDCONN_COMPL:
1048 if (unlikely(!qedi_conn))
1049 break;
1050
1051 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1052 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1053 qedi_conn->active_cmd_count, abrt_conn,
1054 qedi_ep->state,
1055 qedi_ep->iscsi_cid,
1056 qedi_ep->conn
1057 );
1058
1059 if (!qedi_conn->active_cmd_count)
1060 abrt_conn = 0;
1061 else
1062 abrt_conn = 1;
1063
1064 if (abrt_conn)
1065 qedi_clearsq(qedi, qedi_conn, NULL);
1066 break;
1067 default:
1068 break;
1069 }
1070
1071 qedi_ep->state = EP_STATE_DISCONN_START;
1072 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1073 if (ret) {
1074 QEDI_WARN(&qedi->dbg_ctx,
1075 "destroy_conn failed returned %d\n", ret);
1076 } else {
1077 ret = wait_event_interruptible_timeout(
1078 qedi_ep->tcp_ofld_wait,
1079 (qedi_ep->state !=
1080 EP_STATE_DISCONN_START),
1081 wait_delay);
1082 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1083 QEDI_WARN(&qedi->dbg_ctx,
1084 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1085 ret, wait_delay, qedi_ep->iscsi_cid);
1086 }
1087 }
1088
1089ep_release_conn:
1090 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1091 if (ret)
1092 QEDI_WARN(&qedi->dbg_ctx,
1093 "release_conn returned %d, cid=0x%x\n",
1094 ret, qedi_ep->iscsi_cid);
1095ep_exit_recover:
1096 qedi_ep->state = EP_STATE_IDLE;
1097 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1098 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1099 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1100 qedi_free_sq(qedi, qedi_ep);
1101
1102 if (qedi_conn)
1103 qedi_conn->ep = NULL;
1104
1105 qedi_ep->conn = NULL;
1106 qedi_ep->qedi = NULL;
1107 atomic_dec(&qedi->num_offloads);
1108
1109 iscsi_destroy_endpoint(ep);
1110}
1111
1112static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1113{
1114 struct qed_dev *cdev = qedi->cdev;
1115 struct qedi_uio_dev *udev;
1116 struct qedi_uio_ctrl *uctrl;
1117 struct sk_buff *skb;
1118 u32 len;
1119 int rc = 0;
1120
1121 udev = qedi->udev;
1122 if (!udev) {
1123 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1124 return -EINVAL;
1125 }
1126
1127 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1128 if (!uctrl) {
1129 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1130 return -EINVAL;
1131 }
1132
1133 len = uctrl->host_tx_pkt_len;
1134 if (!len) {
1135 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1136 return -EINVAL;
1137 }
1138
1139 skb = alloc_skb(len, GFP_ATOMIC);
1140 if (!skb) {
1141 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1142 return -EINVAL;
1143 }
1144
1145 skb_put(skb, len);
1146 memcpy(skb->data, udev->tx_pkt, len);
1147 skb->ip_summed = CHECKSUM_NONE;
1148
1149 if (vlanid)
1150 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1151
1152 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0);
1153 if (rc) {
1154 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1155 rc);
1156 kfree_skb(skb);
1157 }
1158
1159 uctrl->host_tx_pkt_len = 0;
1160 uctrl->hw_tx_cons++;
1161
1162 return rc;
1163}
1164
1165static void qedi_offload_work(struct work_struct *work)
1166{
1167 struct qedi_endpoint *qedi_ep =
1168 container_of(work, struct qedi_endpoint, offload_work);
1169 struct qedi_ctx *qedi;
1170 int wait_delay = 20 * HZ;
1171 int ret;
1172
1173 qedi = qedi_ep->qedi;
1174
1175 ret = qedi_iscsi_offload_conn(qedi_ep);
1176 if (ret) {
1177 QEDI_ERR(&qedi->dbg_ctx,
1178 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1179 qedi_ep->iscsi_cid, qedi_ep, ret);
1180 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1181 return;
1182 }
1183
1184 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1185 (qedi_ep->state ==
1186 EP_STATE_OFLDCONN_COMPL),
1187 wait_delay);
1188 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1189 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1190 QEDI_ERR(&qedi->dbg_ctx,
1191 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1192 qedi_ep->iscsi_cid, qedi_ep);
1193 }
1194}
1195
1196static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1197{
1198 struct qedi_ctx *qedi;
1199 struct qedi_endpoint *qedi_ep;
1200 int ret = 0;
1201 u32 iscsi_cid;
1202 u16 port_id = 0;
1203
1204 if (!shost) {
1205 ret = -ENXIO;
1206 QEDI_ERR(NULL, "shost is NULL\n");
1207 return ret;
1208 }
1209
1210 if (strcmp(shost->hostt->proc_name, "qedi")) {
1211 ret = -ENXIO;
1212 QEDI_ERR(NULL, "shost %s is invalid\n",
1213 shost->hostt->proc_name);
1214 return ret;
1215 }
1216
1217 qedi = iscsi_host_priv(shost);
1218 if (path_data->handle == QEDI_PATH_HANDLE) {
1219 ret = qedi_data_avail(qedi, path_data->vlan_id);
1220 goto set_path_exit;
1221 }
1222
1223 iscsi_cid = (u32)path_data->handle;
1224 qedi_ep = qedi->ep_tbl[iscsi_cid];
1225 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1226 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
1227 if (!qedi_ep) {
1228 ret = -EINVAL;
1229 goto set_path_exit;
1230 }
1231
1232 if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
1233 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
1234 ret = -EIO;
1235 goto set_path_exit;
1236 }
1237
1238 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
1239 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
1240
1241 qedi_ep->vlan_id = path_data->vlan_id;
1242 if (path_data->pmtu < DEF_PATH_MTU) {
1243 qedi_ep->pmtu = qedi->ll2_mtu;
1244 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1245 "MTU cannot be %u, using default MTU %u\n",
1246 path_data->pmtu, qedi_ep->pmtu);
1247 }
1248
1249 if (path_data->pmtu != qedi->ll2_mtu) {
1250 if (path_data->pmtu > JUMBO_MTU) {
1251 ret = -EINVAL;
1252 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
1253 goto set_path_exit;
1254 }
1255
1256 qedi_reset_host_mtu(qedi, path_data->pmtu);
1257 qedi_ep->pmtu = qedi->ll2_mtu;
1258 }
1259
1260 port_id = qedi_ep->src_port;
1261 if (port_id >= QEDI_LOCAL_PORT_MIN &&
1262 port_id < QEDI_LOCAL_PORT_MAX) {
1263 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
1264 port_id = 0;
1265 } else {
1266 port_id = 0;
1267 }
1268
1269 if (!port_id) {
1270 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
1271 if (port_id == QEDI_LOCAL_PORT_INVALID) {
1272 QEDI_ERR(&qedi->dbg_ctx,
1273 "Failed to allocate port id for iscsi_cid=0x%x\n",
1274 iscsi_cid);
1275 ret = -ENOMEM;
1276 goto set_path_exit;
1277 }
1278 }
1279
1280 qedi_ep->src_port = port_id;
1281
1282 if (qedi_ep->ip_type == TCP_IPV4) {
1283 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
1284 sizeof(struct in_addr));
1285 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
1286 sizeof(struct in_addr));
1287 qedi->ip_type = TCP_IPV4;
1288
1289 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1290 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
1291 qedi_ep->src_addr, qedi_ep->src_port,
1292 qedi_ep->dst_addr, qedi_ep->dst_port);
1293 } else {
1294 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
1295 sizeof(struct in6_addr));
1296 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
1297 sizeof(struct in6_addr));
1298 qedi->ip_type = TCP_IPV6;
1299
1300 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1301 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
1302 qedi_ep->src_addr, qedi_ep->src_port,
1303 qedi_ep->dst_addr, qedi_ep->dst_port);
1304 }
1305
1306 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
1307 queue_work(qedi->offload_thread, &qedi_ep->offload_work);
1308
1309 ret = 0;
1310
1311set_path_exit:
1312 return ret;
1313}
1314
1315static umode_t qedi_attr_is_visible(int param_type, int param)
1316{
1317 switch (param_type) {
1318 case ISCSI_HOST_PARAM:
1319 switch (param) {
1320 case ISCSI_HOST_PARAM_NETDEV_NAME:
1321 case ISCSI_HOST_PARAM_HWADDRESS:
1322 case ISCSI_HOST_PARAM_IPADDRESS:
1323 return 0444;
1324 default:
1325 return 0;
1326 }
1327 case ISCSI_PARAM:
1328 switch (param) {
1329 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1330 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1331 case ISCSI_PARAM_HDRDGST_EN:
1332 case ISCSI_PARAM_DATADGST_EN:
1333 case ISCSI_PARAM_CONN_ADDRESS:
1334 case ISCSI_PARAM_CONN_PORT:
1335 case ISCSI_PARAM_EXP_STATSN:
1336 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1337 case ISCSI_PARAM_PERSISTENT_PORT:
1338 case ISCSI_PARAM_PING_TMO:
1339 case ISCSI_PARAM_RECV_TMO:
1340 case ISCSI_PARAM_INITIAL_R2T_EN:
1341 case ISCSI_PARAM_MAX_R2T:
1342 case ISCSI_PARAM_IMM_DATA_EN:
1343 case ISCSI_PARAM_FIRST_BURST:
1344 case ISCSI_PARAM_MAX_BURST:
1345 case ISCSI_PARAM_PDU_INORDER_EN:
1346 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1347 case ISCSI_PARAM_ERL:
1348 case ISCSI_PARAM_TARGET_NAME:
1349 case ISCSI_PARAM_TPGT:
1350 case ISCSI_PARAM_USERNAME:
1351 case ISCSI_PARAM_PASSWORD:
1352 case ISCSI_PARAM_USERNAME_IN:
1353 case ISCSI_PARAM_PASSWORD_IN:
1354 case ISCSI_PARAM_FAST_ABORT:
1355 case ISCSI_PARAM_ABORT_TMO:
1356 case ISCSI_PARAM_LU_RESET_TMO:
1357 case ISCSI_PARAM_TGT_RESET_TMO:
1358 case ISCSI_PARAM_IFACE_NAME:
1359 case ISCSI_PARAM_INITIATOR_NAME:
1360 case ISCSI_PARAM_BOOT_ROOT:
1361 case ISCSI_PARAM_BOOT_NIC:
1362 case ISCSI_PARAM_BOOT_TARGET:
1363 return 0444;
1364 default:
1365 return 0;
1366 }
1367 }
1368
1369 return 0;
1370}
1371
1372static void qedi_cleanup_task(struct iscsi_task *task)
1373{
1374 if (!task->sc || task->state == ISCSI_TASK_PENDING) {
1375 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
1376 atomic_read(&task->refcount));
1377 return;
1378 }
1379
1380 qedi_iscsi_unmap_sg_list(task->dd_data);
1381}
1382
1383struct iscsi_transport qedi_iscsi_transport = {
1384 .owner = THIS_MODULE,
1385 .name = QEDI_MODULE_NAME,
1386 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
1387 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
1388 .create_session = qedi_session_create,
1389 .destroy_session = qedi_session_destroy,
1390 .create_conn = qedi_conn_create,
1391 .bind_conn = qedi_conn_bind,
1392 .start_conn = qedi_conn_start,
1393 .stop_conn = iscsi_conn_stop,
1394 .destroy_conn = qedi_conn_destroy,
1395 .set_param = iscsi_set_param,
1396 .get_ep_param = qedi_ep_get_param,
1397 .get_conn_param = iscsi_conn_get_param,
1398 .get_session_param = iscsi_session_get_param,
1399 .get_host_param = qedi_host_get_param,
1400 .send_pdu = iscsi_conn_send_pdu,
1401 .get_stats = qedi_conn_get_stats,
1402 .xmit_task = qedi_task_xmit,
1403 .cleanup_task = qedi_cleanup_task,
1404 .session_recovery_timedout = iscsi_session_recovery_timedout,
1405 .ep_connect = qedi_ep_connect,
1406 .ep_poll = qedi_ep_poll,
1407 .ep_disconnect = qedi_ep_disconnect,
1408 .set_path = qedi_set_path,
1409 .attr_is_visible = qedi_attr_is_visible,
1410};
1411
1412void qedi_start_conn_recovery(struct qedi_ctx *qedi,
1413 struct qedi_conn *qedi_conn)
1414{
1415 struct iscsi_cls_session *cls_sess;
1416 struct iscsi_cls_conn *cls_conn;
1417 struct iscsi_conn *conn;
1418
1419 cls_conn = qedi_conn->cls_conn;
1420 conn = cls_conn->dd_data;
1421 cls_sess = iscsi_conn_to_session(cls_conn);
1422
1423 if (iscsi_is_session_online(cls_sess)) {
1424 qedi_conn->abrt_conn = 1;
1425 QEDI_ERR(&qedi->dbg_ctx,
1426 "Failing connection, state=0x%x, cid=0x%x\n",
1427 conn->session->state, qedi_conn->iscsi_conn_id);
1428 iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
1429 ISCSI_ERR_CONN_FAILED);
1430 }
1431}
1432
1433static const struct {
1434 enum iscsi_error_types error_code;
1435 char *err_string;
1436} qedi_iscsi_error[] = {
1437 { ISCSI_STATUS_NONE,
1438 "tcp_error none"
1439 },
1440 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
1441 "task cid mismatch"
1442 },
1443 { ISCSI_CONN_ERROR_TASK_NOT_VALID,
1444 "invalid task"
1445 },
1446 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
1447 "rq ring full"
1448 },
1449 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
1450 "cmdq ring full"
1451 },
1452 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
1453 "sge caching failed"
1454 },
1455 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
1456 "hdr digest error"
1457 },
1458 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
1459 "local cmpl error"
1460 },
1461 { ISCSI_CONN_ERROR_DATA_OVERRUN,
1462 "invalid task"
1463 },
1464 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
1465 "out of sge error"
1466 },
1467 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
1468 "tcp ip fragment error"
1469 },
1470 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
1471 "AHS len protocol error"
1472 },
1473 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
1474 "itt out of range error"
1475 },
1476 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
1477 "data seg more than pdu size"
1478 },
1479 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
1480 "invalid opcode"
1481 },
1482 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
1483 "invalid opcode before update"
1484 },
1485 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
1486 "unexpected opcode"
1487 },
1488 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
1489 "r2t carries no data"
1490 },
1491 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
1492 "data sn error"
1493 },
1494 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
1495 "data TTT error"
1496 },
1497 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
1498 "r2t TTT error"
1499 },
1500 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
1501 "buffer offset error"
1502 },
1503 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
1504 "buffer offset ooo"
1505 },
1506 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
1507 "data seg len 0"
1508 },
1509 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
1510 "data xer len error"
1511 },
1512 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
1513 "data xer len1 error"
1514 },
1515 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
1516 "data xer len2 error"
1517 },
1518 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
1519 "protocol lun error"
1520 },
1521 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
1522 "f bit zero error"
1523 },
1524 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
1525 "exp stat sn error"
1526 },
1527 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
1528 "dsl not zero error"
1529 },
1530 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
1531 "invalid dsl"
1532 },
1533 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
1534 "data seg len too big"
1535 },
1536 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
1537 "outstanding r2t count error"
1538 },
1539 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
1540 "sense datalen error"
1541 },
1542};
1543
1544char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
1545{
1546 int i;
1547 char *msg = NULL;
1548
1549 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
1550 if (qedi_iscsi_error[i].error_code == err_code) {
1551 msg = qedi_iscsi_error[i].err_string;
1552 break;
1553 }
1554 }
1555 return msg;
1556}
1557
1558void qedi_process_iscsi_error(struct qedi_endpoint *ep,
1559 struct iscsi_eqe_data *data)
1560{
1561 struct qedi_conn *qedi_conn;
1562 struct qedi_ctx *qedi;
1563 char warn_notice[] = "iscsi_warning";
1564 char error_notice[] = "iscsi_error";
1565 char unknown_msg[] = "Unknown error";
1566 char *message;
1567 int need_recovery = 0;
1568 u32 err_mask = 0;
1569 char *msg;
1570
1571 if (!ep)
1572 return;
1573
1574 qedi_conn = ep->conn;
1575 if (!qedi_conn)
1576 return;
1577
1578 qedi = ep->qedi;
1579
1580 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
1581 data->error_code);
1582
1583 if (err_mask) {
1584 need_recovery = 0;
1585 message = warn_notice;
1586 } else {
1587 need_recovery = 1;
1588 message = error_notice;
1589 }
1590
1591 msg = qedi_get_iscsi_error(data->error_code);
1592 if (!msg) {
1593 need_recovery = 0;
1594 msg = unknown_msg;
1595 }
1596
1597 iscsi_conn_printk(KERN_ALERT,
1598 qedi_conn->cls_conn->dd_data,
1599 "qedi: %s - %s\n", message, msg);
1600
1601 if (need_recovery)
1602 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1603}
1604
1605void qedi_process_tcp_error(struct qedi_endpoint *ep,
1606 struct iscsi_eqe_data *data)
1607{
1608 struct qedi_conn *qedi_conn;
1609
1610 if (!ep)
1611 return;
1612
1613 qedi_conn = ep->conn;
1614 if (!qedi_conn)
1615 return;
1616
1617 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
1618 data->error_code);
1619
1620 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1621}
1622
