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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / scsi / qedi / qedi_iscsi.c
blob8829880a54c38f3a86675964c22bd6f92ad94d7f
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * QLogic iSCSI Offload Driver
4 * Copyright (c) 2016 Cavium Inc.
5 */
6
7 #include <linux/blkdev.h>
8 #include <linux/etherdevice.h>
9 #include <linux/if_ether.h>
10 #include <linux/if_vlan.h>
11 #include <scsi/scsi_tcq.h>
12
13 #include "qedi.h"
14 #include "qedi_iscsi.h"
15 #include "qedi_gbl.h"
16
17 int qedi_recover_all_conns(struct qedi_ctx *qedi)
18 {
19 struct qedi_conn *qedi_conn;
20 int i;
21
22 for (i = 0; i < qedi->max_active_conns; i++) {
23 qedi_conn = qedi_get_conn_from_id(qedi, i);
24 if (!qedi_conn)
25 continue;
26
27 qedi_start_conn_recovery(qedi, qedi_conn);
28 }
29
30 return SUCCESS;
31 }
32
33 static int qedi_eh_host_reset(struct scsi_cmnd *cmd)
34 {
35 struct Scsi_Host *shost = cmd->device->host;
36 struct qedi_ctx *qedi;
37
38 qedi = iscsi_host_priv(shost);
39
40 return qedi_recover_all_conns(qedi);
41 }
42
43 struct scsi_host_template qedi_host_template = {
44 .module = THIS_MODULE,
45 .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver",
46 .proc_name = QEDI_MODULE_NAME,
47 .queuecommand = iscsi_queuecommand,
48 .eh_timed_out = iscsi_eh_cmd_timed_out,
49 .eh_abort_handler = iscsi_eh_abort,
50 .eh_device_reset_handler = iscsi_eh_device_reset,
51 .eh_target_reset_handler = iscsi_eh_recover_target,
52 .eh_host_reset_handler = qedi_eh_host_reset,
53 .target_alloc = iscsi_target_alloc,
54 .change_queue_depth = scsi_change_queue_depth,
55 .can_queue = QEDI_MAX_ISCSI_TASK,
56 .this_id = -1,
57 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD,
58 .max_sectors = 0xffff,
59 .dma_boundary = QEDI_HW_DMA_BOUNDARY,
60 .cmd_per_lun = 128,
61 .shost_attrs = qedi_shost_attrs,
62 };
63
64 static void qedi_conn_free_login_resources(struct qedi_ctx *qedi,
65 struct qedi_conn *qedi_conn)
66 {
67 if (qedi_conn->gen_pdu.resp_bd_tbl) {
68 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
69 qedi_conn->gen_pdu.resp_bd_tbl,
70 qedi_conn->gen_pdu.resp_bd_dma);
71 qedi_conn->gen_pdu.resp_bd_tbl = NULL;
72 }
73
74 if (qedi_conn->gen_pdu.req_bd_tbl) {
75 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
76 qedi_conn->gen_pdu.req_bd_tbl,
77 qedi_conn->gen_pdu.req_bd_dma);
78 qedi_conn->gen_pdu.req_bd_tbl = NULL;
79 }
80
81 if (qedi_conn->gen_pdu.resp_buf) {
82 dma_free_coherent(&qedi->pdev->dev,
83 ISCSI_DEF_MAX_RECV_SEG_LEN,
84 qedi_conn->gen_pdu.resp_buf,
85 qedi_conn->gen_pdu.resp_dma_addr);
86 qedi_conn->gen_pdu.resp_buf = NULL;
87 }
88
89 if (qedi_conn->gen_pdu.req_buf) {
90 dma_free_coherent(&qedi->pdev->dev,
91 ISCSI_DEF_MAX_RECV_SEG_LEN,
92 qedi_conn->gen_pdu.req_buf,
93 qedi_conn->gen_pdu.req_dma_addr);
94 qedi_conn->gen_pdu.req_buf = NULL;
95 }
96 }
97
98 static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi,
99 struct qedi_conn *qedi_conn)
100 {
101 qedi_conn->gen_pdu.req_buf =
102 dma_alloc_coherent(&qedi->pdev->dev,
103 ISCSI_DEF_MAX_RECV_SEG_LEN,
104 &qedi_conn->gen_pdu.req_dma_addr,
105 GFP_KERNEL);
106 if (!qedi_conn->gen_pdu.req_buf)
107 goto login_req_buf_failure;
108
109 qedi_conn->gen_pdu.req_buf_size = 0;
110 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf;
111
112 qedi_conn->gen_pdu.resp_buf =
113 dma_alloc_coherent(&qedi->pdev->dev,
114 ISCSI_DEF_MAX_RECV_SEG_LEN,
115 &qedi_conn->gen_pdu.resp_dma_addr,
116 GFP_KERNEL);
117 if (!qedi_conn->gen_pdu.resp_buf)
118 goto login_resp_buf_failure;
119
120 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
121 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf;
122
123 qedi_conn->gen_pdu.req_bd_tbl =
124 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
125 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
126 if (!qedi_conn->gen_pdu.req_bd_tbl)
127 goto login_req_bd_tbl_failure;
128
129 qedi_conn->gen_pdu.resp_bd_tbl =
130 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
131 &qedi_conn->gen_pdu.resp_bd_dma,
132 GFP_KERNEL);
133 if (!qedi_conn->gen_pdu.resp_bd_tbl)
134 goto login_resp_bd_tbl_failure;
135
136 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS,
137 "Allocation successful, cid=0x%x\n",
138 qedi_conn->iscsi_conn_id);
139 return 0;
140
141 login_resp_bd_tbl_failure:
142 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
143 qedi_conn->gen_pdu.req_bd_tbl,
144 qedi_conn->gen_pdu.req_bd_dma);
145 qedi_conn->gen_pdu.req_bd_tbl = NULL;
146
147 login_req_bd_tbl_failure:
148 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
149 qedi_conn->gen_pdu.resp_buf,
150 qedi_conn->gen_pdu.resp_dma_addr);
151 qedi_conn->gen_pdu.resp_buf = NULL;
152 login_resp_buf_failure:
153 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
154 qedi_conn->gen_pdu.req_buf,
155 qedi_conn->gen_pdu.req_dma_addr);
156 qedi_conn->gen_pdu.req_buf = NULL;
157 login_req_buf_failure:
158 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data,
159 "login resource alloc failed!!\n");
160 return -ENOMEM;
161 }
162
163 static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi,
164 struct iscsi_session *session)
165 {
166 int i;
167
168 for (i = 0; i < session->cmds_max; i++) {
169 struct iscsi_task *task = session->cmds[i];
170 struct qedi_cmd *cmd = task->dd_data;
171
172 if (cmd->io_tbl.sge_tbl)
173 dma_free_coherent(&qedi->pdev->dev,
174 QEDI_ISCSI_MAX_BDS_PER_CMD *
175 sizeof(struct scsi_sge),
176 cmd->io_tbl.sge_tbl,
177 cmd->io_tbl.sge_tbl_dma);
178
179 if (cmd->sense_buffer)
180 dma_free_coherent(&qedi->pdev->dev,
181 SCSI_SENSE_BUFFERSIZE,
182 cmd->sense_buffer,
183 cmd->sense_buffer_dma);
184 }
185 }
186
187 static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session,
188 struct qedi_cmd *cmd)
189 {
190 struct qedi_io_bdt *io = &cmd->io_tbl;
191 struct scsi_sge *sge;
192
193 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev,
194 QEDI_ISCSI_MAX_BDS_PER_CMD *
195 sizeof(*sge),
196 &io->sge_tbl_dma, GFP_KERNEL);
197 if (!io->sge_tbl) {
198 iscsi_session_printk(KERN_ERR, session,
199 "Could not allocate BD table.\n");
200 return -ENOMEM;
201 }
202
203 io->sge_valid = 0;
204 return 0;
205 }
206
207 static int qedi_setup_cmd_pool(struct qedi_ctx *qedi,
208 struct iscsi_session *session)
209 {
210 int i;
211
212 for (i = 0; i < session->cmds_max; i++) {
213 struct iscsi_task *task = session->cmds[i];
214 struct qedi_cmd *cmd = task->dd_data;
215
216 task->hdr = &cmd->hdr;
217 task->hdr_max = sizeof(struct iscsi_hdr);
218
219 if (qedi_alloc_sget(qedi, session, cmd))
220 goto free_sgets;
221
222 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev,
223 SCSI_SENSE_BUFFERSIZE,
224 &cmd->sense_buffer_dma,
225 GFP_KERNEL);
226 if (!cmd->sense_buffer)
227 goto free_sgets;
228 }
229
230 return 0;
231
232 free_sgets:
233 qedi_destroy_cmd_pool(qedi, session);
234 return -ENOMEM;
235 }
236
237 static struct iscsi_cls_session *
238 qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max,
239 u16 qdepth, uint32_t initial_cmdsn)
240 {
241 struct Scsi_Host *shost;
242 struct iscsi_cls_session *cls_session;
243 struct qedi_ctx *qedi;
244 struct qedi_endpoint *qedi_ep;
245
246 if (!ep)
247 return NULL;
248
249 qedi_ep = ep->dd_data;
250 shost = qedi_ep->qedi->shost;
251 qedi = iscsi_host_priv(shost);
252
253 if (cmds_max > qedi->max_sqes)
254 cmds_max = qedi->max_sqes;
255 else if (cmds_max < QEDI_SQ_WQES_MIN)
256 cmds_max = QEDI_SQ_WQES_MIN;
257
258 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost,
259 cmds_max, 0, sizeof(struct qedi_cmd),
260 initial_cmdsn, ISCSI_MAX_TARGET);
261 if (!cls_session) {
262 QEDI_ERR(&qedi->dbg_ctx,
263 "Failed to setup session for ep=%p\n", qedi_ep);
264 return NULL;
265 }
266
267 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) {
268 QEDI_ERR(&qedi->dbg_ctx,
269 "Failed to setup cmd pool for ep=%p\n", qedi_ep);
270 goto session_teardown;
271 }
272
273 return cls_session;
274
275 session_teardown:
276 iscsi_session_teardown(cls_session);
277 return NULL;
278 }
279
280 static void qedi_session_destroy(struct iscsi_cls_session *cls_session)
281 {
282 struct iscsi_session *session = cls_session->dd_data;
283 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
284 struct qedi_ctx *qedi = iscsi_host_priv(shost);
285
286 qedi_destroy_cmd_pool(qedi, session);
287 iscsi_session_teardown(cls_session);
288 }
289
290 static struct iscsi_cls_conn *
291 qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
292 {
293 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
294 struct qedi_ctx *qedi = iscsi_host_priv(shost);
295 struct iscsi_cls_conn *cls_conn;
296 struct qedi_conn *qedi_conn;
297 struct iscsi_conn *conn;
298
299 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn),
300 cid);
301 if (!cls_conn) {
302 QEDI_ERR(&qedi->dbg_ctx,
303 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n",
304 cid, cls_session);
305 return NULL;
306 }
307
308 conn = cls_conn->dd_data;
309 qedi_conn = conn->dd_data;
310 qedi_conn->cls_conn = cls_conn;
311 qedi_conn->qedi = qedi;
312 qedi_conn->ep = NULL;
313 qedi_conn->active_cmd_count = 0;
314 INIT_LIST_HEAD(&qedi_conn->active_cmd_list);
315 spin_lock_init(&qedi_conn->list_lock);
316
317 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) {
318 iscsi_conn_printk(KERN_ALERT, conn,
319 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n",
320 cid, cls_session);
321 goto free_conn;
322 }
323
324 return cls_conn;
325
326 free_conn:
327 iscsi_conn_teardown(cls_conn);
328 return NULL;
329 }
330
331 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
332 {
333 iscsi_block_session(cls_session);
334 }
335
336 void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
337 {
338 iscsi_unblock_session(cls_session);
339 }
340
341 static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi,
342 struct qedi_conn *qedi_conn)
343 {
344 u32 iscsi_cid = qedi_conn->iscsi_conn_id;
345
346 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) {
347 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
348 "conn bind - entry #%d not free\n",
349 iscsi_cid);
350 return -EBUSY;
351 }
352
353 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn;
354 return 0;
355 }
356
357 struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid)
358 {
359 if (!qedi->cid_que.conn_cid_tbl) {
360 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n");
361 return NULL;
362
363 } else if (iscsi_cid >= qedi->max_active_conns) {
364 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid);
365 return NULL;
366 }
367 return qedi->cid_que.conn_cid_tbl[iscsi_cid];
368 }
369
370 static int qedi_conn_bind(struct iscsi_cls_session *cls_session,
371 struct iscsi_cls_conn *cls_conn,
372 u64 transport_fd, int is_leading)
373 {
374 struct iscsi_conn *conn = cls_conn->dd_data;
375 struct qedi_conn *qedi_conn = conn->dd_data;
376 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
377 struct qedi_ctx *qedi = iscsi_host_priv(shost);
378 struct qedi_endpoint *qedi_ep;
379 struct iscsi_endpoint *ep;
380
381 ep = iscsi_lookup_endpoint(transport_fd);
382 if (!ep)
383 return -EINVAL;
384
385 qedi_ep = ep->dd_data;
386 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) ||
387 (qedi_ep->state == EP_STATE_TCP_RST_RCVD))
388 return -EINVAL;
389
390 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
391 return -EINVAL;
392
393 qedi_ep->conn = qedi_conn;
394 qedi_conn->ep = qedi_ep;
395 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
396 qedi_conn->fw_cid = qedi_ep->fw_cid;
397 qedi_conn->cmd_cleanup_req = 0;
398 qedi_conn->cmd_cleanup_cmpl = 0;
399
400 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn))
401 return -EINVAL;
402
403 spin_lock_init(&qedi_conn->tmf_work_lock);
404 INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
405 init_waitqueue_head(&qedi_conn->wait_queue);
406 return 0;
407 }
408
409 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
410 struct qedi_conn *qedi_conn)
411 {
412 struct qed_iscsi_params_update *conn_info;
413 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
414 struct iscsi_conn *conn = cls_conn->dd_data;
415 struct qedi_endpoint *qedi_ep;
416 int rval;
417
418 qedi_ep = qedi_conn->ep;
419
420 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
421 if (!conn_info) {
422 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
423 return -ENOMEM;
424 }
425
426 conn_info->update_flag = 0;
427
428 if (conn->hdrdgst_en)
429 SET_FIELD(conn_info->update_flag,
430 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
431 if (conn->datadgst_en)
432 SET_FIELD(conn_info->update_flag,
433 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
434 if (conn->session->initial_r2t_en)
435 SET_FIELD(conn_info->update_flag,
436 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
437 true);
438 if (conn->session->imm_data_en)
439 SET_FIELD(conn_info->update_flag,
440 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
441 true);
442
443 conn_info->max_seq_size = conn->session->max_burst;
444 conn_info->max_recv_pdu_length = conn->max_recv_dlength;
445 conn_info->max_send_pdu_length = conn->max_xmit_dlength;
446 conn_info->first_seq_length = conn->session->first_burst;
447 conn_info->exp_stat_sn = conn->exp_statsn;
448
449 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
450 conn_info);
451 if (rval) {
452 rval = -ENXIO;
453 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
454 }
455
456 kfree(conn_info);
457 return rval;
458 }
459
460 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
461 {
462 u16 mss = 0;
463 u16 hdrs = TCP_HDR_LEN;
464
465 if (is_ipv6)
466 hdrs += IPV6_HDR_LEN;
467 else
468 hdrs += IPV4_HDR_LEN;
469
470 mss = pmtu - hdrs;
471
472 if (!mss)
473 mss = DEF_MSS;
474
475 return mss;
476 }
477
478 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
479 {
480 struct qedi_ctx *qedi = qedi_ep->qedi;
481 struct qed_iscsi_params_offload *conn_info;
482 int rval;
483 int i;
484
485 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
486 if (!conn_info) {
487 QEDI_ERR(&qedi->dbg_ctx,
488 "Failed to allocate memory ep=%p\n", qedi_ep);
489 return -ENOMEM;
490 }
491
492 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
493 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
494
495 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
496 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
497
498 if (qedi_ep->ip_type == TCP_IPV4) {
499 conn_info->ip_version = 0;
500 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
501 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
502 qedi_ep->src_addr, qedi_ep->dst_addr);
503 } else {
504 for (i = 1; i < 4; i++) {
505 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
506 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
507 }
508
509 conn_info->ip_version = 1;
510 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
511 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
512 qedi_ep->src_addr, qedi_ep->dst_addr);
513 }
514
515 conn_info->src.port = qedi_ep->src_port;
516 conn_info->dst.port = qedi_ep->dst_port;
517
518 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
519 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
520 conn_info->vlan_id = qedi_ep->vlan_id;
521
522 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
523 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
524 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
525 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
526
527 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues);
528
529 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
530 conn_info->dup_ack_theshold = 3;
531 conn_info->rcv_wnd = 65535;
532
533 conn_info->ss_thresh = 65535;
534 conn_info->srtt = 300;
535 conn_info->rtt_var = 150;
536 conn_info->flow_label = 0;
537 conn_info->ka_timeout = DEF_KA_TIMEOUT;
538 conn_info->ka_interval = DEF_KA_INTERVAL;
539 conn_info->max_rt_time = DEF_MAX_RT_TIME;
540 conn_info->ttl = DEF_TTL;
541 conn_info->tos_or_tc = DEF_TOS;
542 conn_info->remote_port = qedi_ep->dst_port;
543 conn_info->local_port = qedi_ep->src_port;
544
545 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
546 (qedi_ep->ip_type == TCP_IPV6),
547 1, (qedi_ep->vlan_id != 0));
548
549 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss;
550 conn_info->rcv_wnd_scale = 4;
551 conn_info->da_timeout_value = 200;
552 conn_info->ack_frequency = 2;
553
554 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
555 "Default cq index [%d], mss [%d]\n",
556 conn_info->default_cq, conn_info->mss);
557
558 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
559 if (rval)
560 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
561 rval, qedi_ep);
562
563 kfree(conn_info);
564 return rval;
565 }
566
567 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
568 {
569 struct iscsi_conn *conn = cls_conn->dd_data;
570 struct qedi_conn *qedi_conn = conn->dd_data;
571 struct qedi_ctx *qedi;
572 int rval;
573
574 qedi = qedi_conn->qedi;
575
576 rval = qedi_iscsi_update_conn(qedi, qedi_conn);
577 if (rval) {
578 iscsi_conn_printk(KERN_ALERT, conn,
579 "conn_start: FW offload conn failed.\n");
580 rval = -EINVAL;
581 goto start_err;
582 }
583
584 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
585 qedi_conn->abrt_conn = 0;
586
587 rval = iscsi_conn_start(cls_conn);
588 if (rval) {
589 iscsi_conn_printk(KERN_ALERT, conn,
590 "iscsi_conn_start: FW offload conn failed!!\n");
591 }
592
593 start_err:
594 return rval;
595 }
596
597 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
598 {
599 struct iscsi_conn *conn = cls_conn->dd_data;
600 struct qedi_conn *qedi_conn = conn->dd_data;
601 struct Scsi_Host *shost;
602 struct qedi_ctx *qedi;
603
604 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
605 qedi = iscsi_host_priv(shost);
606
607 qedi_conn_free_login_resources(qedi, qedi_conn);
608 iscsi_conn_teardown(cls_conn);
609 }
610
611 static int qedi_ep_get_param(struct iscsi_endpoint *ep,
612 enum iscsi_param param, char *buf)
613 {
614 struct qedi_endpoint *qedi_ep = ep->dd_data;
615 int len;
616
617 if (!qedi_ep)
618 return -ENOTCONN;
619
620 switch (param) {
621 case ISCSI_PARAM_CONN_PORT:
622 len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
623 break;
624 case ISCSI_PARAM_CONN_ADDRESS:
625 if (qedi_ep->ip_type == TCP_IPV4)
626 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
627 else
628 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
629 break;
630 default:
631 return -ENOTCONN;
632 }
633
634 return len;
635 }
636
637 static int qedi_host_get_param(struct Scsi_Host *shost,
638 enum iscsi_host_param param, char *buf)
639 {
640 struct qedi_ctx *qedi;
641 int len;
642
643 qedi = iscsi_host_priv(shost);
644
645 switch (param) {
646 case ISCSI_HOST_PARAM_HWADDRESS:
647 len = sysfs_format_mac(buf, qedi->mac, 6);
648 break;
649 case ISCSI_HOST_PARAM_NETDEV_NAME:
650 len = sprintf(buf, "host%d\n", shost->host_no);
651 break;
652 case ISCSI_HOST_PARAM_IPADDRESS:
653 if (qedi->ip_type == TCP_IPV4)
654 len = sprintf(buf, "%pI4\n", qedi->src_ip);
655 else
656 len = sprintf(buf, "%pI6\n", qedi->src_ip);
657 break;
658 default:
659 return iscsi_host_get_param(shost, param, buf);
660 }
661
662 return len;
663 }
664
665 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
666 struct iscsi_stats *stats)
667 {
668 struct iscsi_conn *conn = cls_conn->dd_data;
669 struct qed_iscsi_stats iscsi_stats;
670 struct Scsi_Host *shost;
671 struct qedi_ctx *qedi;
672
673 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
674 qedi = iscsi_host_priv(shost);
675 qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
676
677 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
678 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
679 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
680 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
681 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
682
683 stats->txdata_octets = conn->txdata_octets;
684 stats->rxdata_octets = conn->rxdata_octets;
685 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
686 stats->dataout_pdus = conn->dataout_pdus_cnt;
687 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
688 stats->datain_pdus = conn->datain_pdus_cnt;
689 stats->r2t_pdus = conn->r2t_pdus_cnt;
690 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
691 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
692 stats->digest_err = 0;
693 stats->timeout_err = 0;
694 strcpy(stats->custom[0].desc, "eh_abort_cnt");
695 stats->custom[0].value = conn->eh_abort_cnt;
696 stats->custom_length = 1;
697 }
698
699 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
700 {
701 struct scsi_sge *bd_tbl;
702
703 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
704
705 bd_tbl->sge_addr.hi =
706 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
707 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
708 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
709 qedi_conn->gen_pdu.req_buf;
710 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
711 bd_tbl->sge_addr.hi =
712 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
713 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
714 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
715 }
716
717 static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
718 {
719 struct qedi_cmd *cmd = task->dd_data;
720 struct qedi_conn *qedi_conn = cmd->conn;
721 char *buf;
722 int data_len;
723 int rc = 0;
724
725 qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
726 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
727 case ISCSI_OP_LOGIN:
728 qedi_send_iscsi_login(qedi_conn, task);
729 break;
730 case ISCSI_OP_NOOP_OUT:
731 data_len = qedi_conn->gen_pdu.req_buf_size;
732 buf = qedi_conn->gen_pdu.req_buf;
733 if (data_len)
734 rc = qedi_send_iscsi_nopout(qedi_conn, task,
735 buf, data_len, 1);
736 else
737 rc = qedi_send_iscsi_nopout(qedi_conn, task,
738 NULL, 0, 1);
739 break;
740 case ISCSI_OP_LOGOUT:
741 rc = qedi_send_iscsi_logout(qedi_conn, task);
742 break;
743 case ISCSI_OP_SCSI_TMFUNC:
744 rc = qedi_iscsi_abort_work(qedi_conn, task);
745 break;
746 case ISCSI_OP_TEXT:
747 rc = qedi_send_iscsi_text(qedi_conn, task);
748 break;
749 default:
750 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
751 "unsupported op 0x%x\n", task->hdr->opcode);
752 }
753
754 return rc;
755 }
756
757 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
758 {
759 struct qedi_conn *qedi_conn = conn->dd_data;
760 struct qedi_cmd *cmd = task->dd_data;
761
762 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
763
764 qedi_conn->gen_pdu.req_buf_size = task->data_count;
765
766 if (task->data_count) {
767 memcpy(qedi_conn->gen_pdu.req_buf, task->data,
768 task->data_count);
769 qedi_conn->gen_pdu.req_wr_ptr =
770 qedi_conn->gen_pdu.req_buf + task->data_count;
771 }
772
773 cmd->conn = conn->dd_data;
774 cmd->scsi_cmd = NULL;
775 return qedi_iscsi_send_generic_request(task);
776 }
777
778 static int qedi_task_xmit(struct iscsi_task *task)
779 {
780 struct iscsi_conn *conn = task->conn;
781 struct qedi_conn *qedi_conn = conn->dd_data;
782 struct qedi_cmd *cmd = task->dd_data;
783 struct scsi_cmnd *sc = task->sc;
784
785 cmd->state = 0;
786 cmd->task = NULL;
787 cmd->use_slowpath = false;
788 cmd->conn = qedi_conn;
789 cmd->task = task;
790 cmd->io_cmd_in_list = false;
791 INIT_LIST_HEAD(&cmd->io_cmd);
792
793 if (!sc)
794 return qedi_mtask_xmit(conn, task);
795
796 cmd->scsi_cmd = sc;
797 return qedi_iscsi_send_ioreq(task);
798 }
799
800 static struct iscsi_endpoint *
801 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
802 int non_blocking)
803 {
804 struct qedi_ctx *qedi;
805 struct iscsi_endpoint *ep;
806 struct qedi_endpoint *qedi_ep;
807 struct sockaddr_in *addr;
808 struct sockaddr_in6 *addr6;
809 struct iscsi_path path_req;
810 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
811 u32 iscsi_cid = QEDI_CID_RESERVED;
812 u16 len = 0;
813 char *buf = NULL;
814 int ret, tmp;
815
816 if (!shost) {
817 ret = -ENXIO;
818 QEDI_ERR(NULL, "shost is NULL\n");
819 return ERR_PTR(ret);
820 }
821
822 if (qedi_do_not_recover) {
823 ret = -ENOMEM;
824 return ERR_PTR(ret);
825 }
826
827 qedi = iscsi_host_priv(shost);
828
829 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
830 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
831 ret = -ENOMEM;
832 return ERR_PTR(ret);
833 }
834
835 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
836 if (!ep) {
837 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
838 ret = -ENOMEM;
839 return ERR_PTR(ret);
840 }
841 qedi_ep = ep->dd_data;
842 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
843 qedi_ep->state = EP_STATE_IDLE;
844 qedi_ep->iscsi_cid = (u32)-1;
845 qedi_ep->qedi = qedi;
846
847 if (dst_addr->sa_family == AF_INET) {
848 addr = (struct sockaddr_in *)dst_addr;
849 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
850 sizeof(struct in_addr));
851 qedi_ep->dst_port = ntohs(addr->sin_port);
852 qedi_ep->ip_type = TCP_IPV4;
853 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
854 "dst_addr=%pI4, dst_port=%u\n",
855 qedi_ep->dst_addr, qedi_ep->dst_port);
856 } else if (dst_addr->sa_family == AF_INET6) {
857 addr6 = (struct sockaddr_in6 *)dst_addr;
858 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
859 sizeof(struct in6_addr));
860 qedi_ep->dst_port = ntohs(addr6->sin6_port);
861 qedi_ep->ip_type = TCP_IPV6;
862 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
863 "dst_addr=%pI6, dst_port=%u\n",
864 qedi_ep->dst_addr, qedi_ep->dst_port);
865 } else {
866 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
867 }
868
869 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
870 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
871 ret = -ENXIO;
872 goto ep_conn_exit;
873 }
874
875 ret = qedi_alloc_sq(qedi, qedi_ep);
876 if (ret)
877 goto ep_conn_exit;
878
879 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
880 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
881
882 if (ret) {
883 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
884 ret = -ENXIO;
885 goto ep_free_sq;
886 }
887
888 iscsi_cid = qedi_ep->handle;
889 qedi_ep->iscsi_cid = iscsi_cid;
890
891 init_waitqueue_head(&qedi_ep->ofld_wait);
892 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
893 qedi_ep->state = EP_STATE_OFLDCONN_START;
894 qedi->ep_tbl[iscsi_cid] = qedi_ep;
895
896 buf = (char *)&path_req;
897 len = sizeof(path_req);
898 memset(&path_req, 0, len);
899
900 msg_type = ISCSI_KEVENT_PATH_REQ;
901 path_req.handle = (u64)qedi_ep->iscsi_cid;
902 path_req.pmtu = qedi->ll2_mtu;
903 qedi_ep->pmtu = qedi->ll2_mtu;
904 if (qedi_ep->ip_type == TCP_IPV4) {
905 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
906 sizeof(struct in_addr));
907 path_req.ip_addr_len = 4;
908 } else {
909 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
910 sizeof(struct in6_addr));
911 path_req.ip_addr_len = 16;
912 }
913
914 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
915 len);
916 if (ret) {
917 QEDI_ERR(&qedi->dbg_ctx,
918 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
919 iscsi_cid, ret);
920 goto ep_rel_conn;
921 }
922
923 atomic_inc(&qedi->num_offloads);
924 return ep;
925
926 ep_rel_conn:
927 qedi->ep_tbl[iscsi_cid] = NULL;
928 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
929 if (tmp)
930 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
931 tmp);
932 ep_free_sq:
933 qedi_free_sq(qedi, qedi_ep);
934 ep_conn_exit:
935 iscsi_destroy_endpoint(ep);
936 return ERR_PTR(ret);
937 }
938
939 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
940 {
941 struct qedi_endpoint *qedi_ep;
942 int ret = 0;
943
944 if (qedi_do_not_recover)
945 return 1;
946
947 qedi_ep = ep->dd_data;
948 if (qedi_ep->state == EP_STATE_IDLE ||
949 qedi_ep->state == EP_STATE_OFLDCONN_NONE ||
950 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
951 return -1;
952
953 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
954 ret = 1;
955
956 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
957 QEDI_OFLD_WAIT_STATE(qedi_ep),
958 msecs_to_jiffies(timeout_ms));
959
960 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
961 ret = -1;
962
963 if (ret > 0)
964 return 1;
965 else if (!ret)
966 return 0;
967 else
968 return ret;
969 }
970
971 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
972 {
973 struct qedi_cmd *cmd, *cmd_tmp;
974
975 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
976 io_cmd) {
977 list_del_init(&cmd->io_cmd);
978 qedi_conn->active_cmd_count--;
979 }
980 }
981
982 static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
983 {
984 struct qedi_endpoint *qedi_ep;
985 struct qedi_conn *qedi_conn = NULL;
986 struct iscsi_conn *conn = NULL;
987 struct qedi_ctx *qedi;
988 int ret = 0;
989 int wait_delay;
990 int abrt_conn = 0;
991 int count = 10;
992
993 wait_delay = 60 * HZ + DEF_MAX_RT_TIME;
994 qedi_ep = ep->dd_data;
995 qedi = qedi_ep->qedi;
996
997 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
998 goto ep_exit_recover;
999
1000 flush_work(&qedi_ep->offload_work);
1001
1002 if (qedi_ep->conn) {
1003 qedi_conn = qedi_ep->conn;
1004 conn = qedi_conn->cls_conn->dd_data;
1005 iscsi_suspend_queue(conn);
1006 abrt_conn = qedi_conn->abrt_conn;
1007
1008 while (count--) {
1009 if (!test_bit(QEDI_CONN_FW_CLEANUP,
1010 &qedi_conn->flags)) {
1011 break;
1012 }
1013 msleep(1000);
1014 }
1015
1016 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
1017 if (qedi_do_not_recover) {
1018 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1019 "Do not recover cid=0x%x\n",
1020 qedi_ep->iscsi_cid);
1021 goto ep_exit_recover;
1022 }
1023 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1024 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
1025 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
1026 qedi_cleanup_active_cmd_list(qedi_conn);
1027 goto ep_release_conn;
1028 }
1029 }
1030
1031 if (qedi_do_not_recover)
1032 goto ep_exit_recover;
1033
1034 switch (qedi_ep->state) {
1035 case EP_STATE_OFLDCONN_START:
1036 case EP_STATE_OFLDCONN_NONE:
1037 goto ep_release_conn;
1038 case EP_STATE_OFLDCONN_FAILED:
1039 break;
1040 case EP_STATE_OFLDCONN_COMPL:
1041 if (unlikely(!qedi_conn))
1042 break;
1043
1044 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1045 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1046 qedi_conn->active_cmd_count, abrt_conn,
1047 qedi_ep->state,
1048 qedi_ep->iscsi_cid,
1049 qedi_ep->conn
1050 );
1051
1052 if (!qedi_conn->active_cmd_count)
1053 abrt_conn = 0;
1054 else
1055 abrt_conn = 1;
1056
1057 if (abrt_conn)
1058 qedi_clearsq(qedi, qedi_conn, NULL);
1059 break;
1060 default:
1061 break;
1062 }
1063
1064 qedi_ep->state = EP_STATE_DISCONN_START;
1065 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1066 if (ret) {
1067 QEDI_WARN(&qedi->dbg_ctx,
1068 "destroy_conn failed returned %d\n", ret);
1069 } else {
1070 ret = wait_event_interruptible_timeout(
1071 qedi_ep->tcp_ofld_wait,
1072 (qedi_ep->state !=
1073 EP_STATE_DISCONN_START),
1074 wait_delay);
1075 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1076 QEDI_WARN(&qedi->dbg_ctx,
1077 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1078 ret, wait_delay, qedi_ep->iscsi_cid);
1079 }
1080 }
1081
1082 ep_release_conn:
1083 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1084 if (ret)
1085 QEDI_WARN(&qedi->dbg_ctx,
1086 "release_conn returned %d, cid=0x%x\n",
1087 ret, qedi_ep->iscsi_cid);
1088 ep_exit_recover:
1089 qedi_ep->state = EP_STATE_IDLE;
1090 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1091 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1092 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1093 qedi_free_sq(qedi, qedi_ep);
1094
1095 if (qedi_conn)
1096 qedi_conn->ep = NULL;
1097
1098 qedi_ep->conn = NULL;
1099 qedi_ep->qedi = NULL;
1100 atomic_dec(&qedi->num_offloads);
1101
1102 iscsi_destroy_endpoint(ep);
1103 }
1104
1105 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1106 {
1107 struct qed_dev *cdev = qedi->cdev;
1108 struct qedi_uio_dev *udev;
1109 struct qedi_uio_ctrl *uctrl;
1110 struct sk_buff *skb;
1111 u32 len;
1112 int rc = 0;
1113
1114 udev = qedi->udev;
1115 if (!udev) {
1116 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1117 return -EINVAL;
1118 }
1119
1120 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1121 if (!uctrl) {
1122 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1123 return -EINVAL;
1124 }
1125
1126 len = uctrl->host_tx_pkt_len;
1127 if (!len) {
1128 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1129 return -EINVAL;
1130 }
1131
1132 skb = alloc_skb(len, GFP_ATOMIC);
1133 if (!skb) {
1134 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1135 return -EINVAL;
1136 }
1137
1138 skb_put(skb, len);
1139 memcpy(skb->data, udev->tx_pkt, len);
1140 skb->ip_summed = CHECKSUM_NONE;
1141
1142 if (vlanid)
1143 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1144
1145 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0);
1146 if (rc) {
1147 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1148 rc);
1149 kfree_skb(skb);
1150 }
1151
1152 uctrl->host_tx_pkt_len = 0;
1153 uctrl->hw_tx_cons++;
1154
1155 return rc;
1156 }
1157
1158 static void qedi_offload_work(struct work_struct *work)
1159 {
1160 struct qedi_endpoint *qedi_ep =
1161 container_of(work, struct qedi_endpoint, offload_work);
1162 struct qedi_ctx *qedi;
1163 int wait_delay = 5 * HZ;
1164 int ret;
1165
1166 qedi = qedi_ep->qedi;
1167
1168 ret = qedi_iscsi_offload_conn(qedi_ep);
1169 if (ret) {
1170 QEDI_ERR(&qedi->dbg_ctx,
1171 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1172 qedi_ep->iscsi_cid, qedi_ep, ret);
1173 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1174 return;
1175 }
1176
1177 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1178 (qedi_ep->state ==
1179 EP_STATE_OFLDCONN_COMPL),
1180 wait_delay);
1181 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1182 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1183 QEDI_ERR(&qedi->dbg_ctx,
1184 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1185 qedi_ep->iscsi_cid, qedi_ep);
1186 }
1187 }
1188
1189 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1190 {
1191 struct qedi_ctx *qedi;
1192 struct qedi_endpoint *qedi_ep;
1193 int ret = 0;
1194 u32 iscsi_cid;
1195 u16 port_id = 0;
1196
1197 if (!shost) {
1198 ret = -ENXIO;
1199 QEDI_ERR(NULL, "shost is NULL\n");
1200 return ret;
1201 }
1202
1203 if (strcmp(shost->hostt->proc_name, "qedi")) {
1204 ret = -ENXIO;
1205 QEDI_ERR(NULL, "shost %s is invalid\n",
1206 shost->hostt->proc_name);
1207 return ret;
1208 }
1209
1210 qedi = iscsi_host_priv(shost);
1211 if (path_data->handle == QEDI_PATH_HANDLE) {
1212 ret = qedi_data_avail(qedi, path_data->vlan_id);
1213 goto set_path_exit;
1214 }
1215
1216 iscsi_cid = (u32)path_data->handle;
1217 qedi_ep = qedi->ep_tbl[iscsi_cid];
1218 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1219 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
1220 if (!qedi_ep) {
1221 ret = -EINVAL;
1222 goto set_path_exit;
1223 }
1224
1225 if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
1226 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
1227 qedi_ep->state = EP_STATE_OFLDCONN_NONE;
1228 ret = -EIO;
1229 goto set_path_exit;
1230 }
1231
1232 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
1233 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
1234
1235 qedi_ep->vlan_id = path_data->vlan_id;
1236 if (path_data->pmtu < DEF_PATH_MTU) {
1237 qedi_ep->pmtu = qedi->ll2_mtu;
1238 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1239 "MTU cannot be %u, using default MTU %u\n",
1240 path_data->pmtu, qedi_ep->pmtu);
1241 }
1242
1243 if (path_data->pmtu != qedi->ll2_mtu) {
1244 if (path_data->pmtu > JUMBO_MTU) {
1245 ret = -EINVAL;
1246 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
1247 goto set_path_exit;
1248 }
1249
1250 qedi_reset_host_mtu(qedi, path_data->pmtu);
1251 qedi_ep->pmtu = qedi->ll2_mtu;
1252 }
1253
1254 port_id = qedi_ep->src_port;
1255 if (port_id >= QEDI_LOCAL_PORT_MIN &&
1256 port_id < QEDI_LOCAL_PORT_MAX) {
1257 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
1258 port_id = 0;
1259 } else {
1260 port_id = 0;
1261 }
1262
1263 if (!port_id) {
1264 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
1265 if (port_id == QEDI_LOCAL_PORT_INVALID) {
1266 QEDI_ERR(&qedi->dbg_ctx,
1267 "Failed to allocate port id for iscsi_cid=0x%x\n",
1268 iscsi_cid);
1269 ret = -ENOMEM;
1270 goto set_path_exit;
1271 }
1272 }
1273
1274 qedi_ep->src_port = port_id;
1275
1276 if (qedi_ep->ip_type == TCP_IPV4) {
1277 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
1278 sizeof(struct in_addr));
1279 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
1280 sizeof(struct in_addr));
1281 qedi->ip_type = TCP_IPV4;
1282
1283 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1284 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
1285 qedi_ep->src_addr, qedi_ep->src_port,
1286 qedi_ep->dst_addr, qedi_ep->dst_port);
1287 } else {
1288 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
1289 sizeof(struct in6_addr));
1290 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
1291 sizeof(struct in6_addr));
1292 qedi->ip_type = TCP_IPV6;
1293
1294 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1295 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
1296 qedi_ep->src_addr, qedi_ep->src_port,
1297 qedi_ep->dst_addr, qedi_ep->dst_port);
1298 }
1299
1300 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
1301 queue_work(qedi->offload_thread, &qedi_ep->offload_work);
1302
1303 ret = 0;
1304
1305 set_path_exit:
1306 return ret;
1307 }
1308
1309 static umode_t qedi_attr_is_visible(int param_type, int param)
1310 {
1311 switch (param_type) {
1312 case ISCSI_HOST_PARAM:
1313 switch (param) {
1314 case ISCSI_HOST_PARAM_NETDEV_NAME:
1315 case ISCSI_HOST_PARAM_HWADDRESS:
1316 case ISCSI_HOST_PARAM_IPADDRESS:
1317 return 0444;
1318 default:
1319 return 0;
1320 }
1321 case ISCSI_PARAM:
1322 switch (param) {
1323 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1324 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1325 case ISCSI_PARAM_HDRDGST_EN:
1326 case ISCSI_PARAM_DATADGST_EN:
1327 case ISCSI_PARAM_CONN_ADDRESS:
1328 case ISCSI_PARAM_CONN_PORT:
1329 case ISCSI_PARAM_EXP_STATSN:
1330 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1331 case ISCSI_PARAM_PERSISTENT_PORT:
1332 case ISCSI_PARAM_PING_TMO:
1333 case ISCSI_PARAM_RECV_TMO:
1334 case ISCSI_PARAM_INITIAL_R2T_EN:
1335 case ISCSI_PARAM_MAX_R2T:
1336 case ISCSI_PARAM_IMM_DATA_EN:
1337 case ISCSI_PARAM_FIRST_BURST:
1338 case ISCSI_PARAM_MAX_BURST:
1339 case ISCSI_PARAM_PDU_INORDER_EN:
1340 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1341 case ISCSI_PARAM_ERL:
1342 case ISCSI_PARAM_TARGET_NAME:
1343 case ISCSI_PARAM_TPGT:
1344 case ISCSI_PARAM_USERNAME:
1345 case ISCSI_PARAM_PASSWORD:
1346 case ISCSI_PARAM_USERNAME_IN:
1347 case ISCSI_PARAM_PASSWORD_IN:
1348 case ISCSI_PARAM_FAST_ABORT:
1349 case ISCSI_PARAM_ABORT_TMO:
1350 case ISCSI_PARAM_LU_RESET_TMO:
1351 case ISCSI_PARAM_TGT_RESET_TMO:
1352 case ISCSI_PARAM_IFACE_NAME:
1353 case ISCSI_PARAM_INITIATOR_NAME:
1354 case ISCSI_PARAM_BOOT_ROOT:
1355 case ISCSI_PARAM_BOOT_NIC:
1356 case ISCSI_PARAM_BOOT_TARGET:
1357 return 0444;
1358 default:
1359 return 0;
1360 }
1361 }
1362
1363 return 0;
1364 }
1365
1366 static void qedi_cleanup_task(struct iscsi_task *task)
1367 {
1368 if (!task->sc || task->state == ISCSI_TASK_PENDING) {
1369 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
1370 refcount_read(&task->refcount));
1371 return;
1372 }
1373
1374 qedi_iscsi_unmap_sg_list(task->dd_data);
1375 }
1376
1377 struct iscsi_transport qedi_iscsi_transport = {
1378 .owner = THIS_MODULE,
1379 .name = QEDI_MODULE_NAME,
1380 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
1381 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
1382 .create_session = qedi_session_create,
1383 .destroy_session = qedi_session_destroy,
1384 .create_conn = qedi_conn_create,
1385 .bind_conn = qedi_conn_bind,
1386 .start_conn = qedi_conn_start,
1387 .stop_conn = iscsi_conn_stop,
1388 .destroy_conn = qedi_conn_destroy,
1389 .set_param = iscsi_set_param,
1390 .get_ep_param = qedi_ep_get_param,
1391 .get_conn_param = iscsi_conn_get_param,
1392 .get_session_param = iscsi_session_get_param,
1393 .get_host_param = qedi_host_get_param,
1394 .send_pdu = iscsi_conn_send_pdu,
1395 .get_stats = qedi_conn_get_stats,
1396 .xmit_task = qedi_task_xmit,
1397 .cleanup_task = qedi_cleanup_task,
1398 .session_recovery_timedout = iscsi_session_recovery_timedout,
1399 .ep_connect = qedi_ep_connect,
1400 .ep_poll = qedi_ep_poll,
1401 .ep_disconnect = qedi_ep_disconnect,
1402 .set_path = qedi_set_path,
1403 .attr_is_visible = qedi_attr_is_visible,
1404 };
1405
1406 void qedi_start_conn_recovery(struct qedi_ctx *qedi,
1407 struct qedi_conn *qedi_conn)
1408 {
1409 struct iscsi_cls_session *cls_sess;
1410 struct iscsi_cls_conn *cls_conn;
1411 struct iscsi_conn *conn;
1412
1413 cls_conn = qedi_conn->cls_conn;
1414 conn = cls_conn->dd_data;
1415 cls_sess = iscsi_conn_to_session(cls_conn);
1416
1417 if (iscsi_is_session_online(cls_sess)) {
1418 qedi_conn->abrt_conn = 1;
1419 QEDI_ERR(&qedi->dbg_ctx,
1420 "Failing connection, state=0x%x, cid=0x%x\n",
1421 conn->session->state, qedi_conn->iscsi_conn_id);
1422 iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
1423 ISCSI_ERR_CONN_FAILED);
1424 }
1425 }
1426
1427 static const struct {
1428 enum iscsi_error_types error_code;
1429 char *err_string;
1430 } qedi_iscsi_error[] = {
1431 { ISCSI_STATUS_NONE,
1432 "tcp_error none"
1433 },
1434 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
1435 "task cid mismatch"
1436 },
1437 { ISCSI_CONN_ERROR_TASK_NOT_VALID,
1438 "invalid task"
1439 },
1440 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
1441 "rq ring full"
1442 },
1443 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
1444 "cmdq ring full"
1445 },
1446 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
1447 "sge caching failed"
1448 },
1449 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
1450 "hdr digest error"
1451 },
1452 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
1453 "local cmpl error"
1454 },
1455 { ISCSI_CONN_ERROR_DATA_OVERRUN,
1456 "invalid task"
1457 },
1458 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
1459 "out of sge error"
1460 },
1461 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
1462 "tcp ip fragment error"
1463 },
1464 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
1465 "AHS len protocol error"
1466 },
1467 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
1468 "itt out of range error"
1469 },
1470 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
1471 "data seg more than pdu size"
1472 },
1473 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
1474 "invalid opcode"
1475 },
1476 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
1477 "invalid opcode before update"
1478 },
1479 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
1480 "unexpected opcode"
1481 },
1482 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
1483 "r2t carries no data"
1484 },
1485 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
1486 "data sn error"
1487 },
1488 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
1489 "data TTT error"
1490 },
1491 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
1492 "r2t TTT error"
1493 },
1494 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
1495 "buffer offset error"
1496 },
1497 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
1498 "buffer offset ooo"
1499 },
1500 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
1501 "data seg len 0"
1502 },
1503 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
1504 "data xer len error"
1505 },
1506 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
1507 "data xer len1 error"
1508 },
1509 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
1510 "data xer len2 error"
1511 },
1512 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
1513 "protocol lun error"
1514 },
1515 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
1516 "f bit zero error"
1517 },
1518 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
1519 "exp stat sn error"
1520 },
1521 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
1522 "dsl not zero error"
1523 },
1524 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
1525 "invalid dsl"
1526 },
1527 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
1528 "data seg len too big"
1529 },
1530 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
1531 "outstanding r2t count error"
1532 },
1533 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
1534 "sense datalen error"
1535 },
1536 };
1537
1538 char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
1539 {
1540 int i;
1541 char *msg = NULL;
1542
1543 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
1544 if (qedi_iscsi_error[i].error_code == err_code) {
1545 msg = qedi_iscsi_error[i].err_string;
1546 break;
1547 }
1548 }
1549 return msg;
1550 }
1551
1552 void qedi_process_iscsi_error(struct qedi_endpoint *ep,
1553 struct iscsi_eqe_data *data)
1554 {
1555 struct qedi_conn *qedi_conn;
1556 struct qedi_ctx *qedi;
1557 char warn_notice[] = "iscsi_warning";
1558 char error_notice[] = "iscsi_error";
1559 char unknown_msg[] = "Unknown error";
1560 char *message;
1561 int need_recovery = 0;
1562 u32 err_mask = 0;
1563 char *msg;
1564
1565 if (!ep)
1566 return;
1567
1568 qedi_conn = ep->conn;
1569 if (!qedi_conn)
1570 return;
1571
1572 qedi = ep->qedi;
1573
1574 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
1575 data->error_code);
1576
1577 if (err_mask) {
1578 need_recovery = 0;
1579 message = warn_notice;
1580 } else {
1581 need_recovery = 1;
1582 message = error_notice;
1583 }
1584
1585 msg = qedi_get_iscsi_error(data->error_code);
1586 if (!msg) {
1587 need_recovery = 0;
1588 msg = unknown_msg;
1589 }
1590
1591 iscsi_conn_printk(KERN_ALERT,
1592 qedi_conn->cls_conn->dd_data,
1593 "qedi: %s - %s\n", message, msg);
1594
1595 if (need_recovery)
1596 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1597 }
1598
1599 void qedi_process_tcp_error(struct qedi_endpoint *ep,
1600 struct iscsi_eqe_data *data)
1601 {
1602 struct qedi_conn *qedi_conn;
1603
1604 if (!ep)
1605 return;
1606
1607 qedi_conn = ep->conn;
1608 if (!qedi_conn)
1609 return;
1610
1611 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
1612 data->error_code);
1613
1614 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1615 }
Linux with added FPC-III support