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[mirror_ubuntu-artful-kernel.git] / drivers / scsi / qedi / qedi_iscsi.c
1 /*
2 * QLogic iSCSI Offload Driver
3 * Copyright (c) 2016 Cavium Inc.
4 *
5 * This software is available under the terms of the GNU General Public License
6 * (GPL) Version 2, available from the file COPYING in the main directory of
7 * this source tree.
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
20 int 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
36 static 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
46 struct 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_timed_out = iscsi_eh_cmd_timed_out,
52 .eh_abort_handler = iscsi_eh_abort,
53 .eh_device_reset_handler = iscsi_eh_device_reset,
54 .eh_target_reset_handler = iscsi_eh_recover_target,
55 .eh_host_reset_handler = qedi_eh_host_reset,
56 .target_alloc = iscsi_target_alloc,
57 .change_queue_depth = scsi_change_queue_depth,
58 .can_queue = QEDI_MAX_ISCSI_TASK,
59 .this_id = -1,
60 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD,
61 .max_sectors = 0xffff,
62 .cmd_per_lun = 128,
63 .use_clustering = ENABLE_CLUSTERING,
64 .shost_attrs = qedi_shost_attrs,
65 };
66
67 static 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
101 static 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
144 login_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
150 login_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;
155 login_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;
160 login_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
166 static 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
190 static 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
210 static 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
235 free_sgets:
236 qedi_destroy_cmd_pool(qedi, session);
237 return -ENOMEM;
238 }
239
240 static struct iscsi_cls_session *
241 qedi_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
278 session_teardown:
279 iscsi_session_teardown(cls_session);
280 return NULL;
281 }
282
283 static 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
293 static struct iscsi_cls_conn *
294 qedi_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
329 free_conn:
330 iscsi_conn_teardown(cls_conn);
331 return NULL;
332 }
333
334 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
335 {
336 iscsi_block_session(cls_session);
337 }
338
339 void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
340 {
341 iscsi_unblock_session(cls_session);
342 }
343
344 static 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
360 struct 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
373 static 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
412 static 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
463 static 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
487 static 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 % 8);
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 conn_info->cwnd = DEF_MAX_CWND;
542
543 conn_info->ss_thresh = 65535;
544 conn_info->srtt = 300;
545 conn_info->rtt_var = 150;
546 conn_info->flow_label = 0;
547 conn_info->ka_timeout = DEF_KA_TIMEOUT;
548 conn_info->ka_interval = DEF_KA_INTERVAL;
549 conn_info->max_rt_time = DEF_MAX_RT_TIME;
550 conn_info->ttl = DEF_TTL;
551 conn_info->tos_or_tc = DEF_TOS;
552 conn_info->remote_port = qedi_ep->dst_port;
553 conn_info->local_port = qedi_ep->src_port;
554
555 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
556 (qedi_ep->ip_type == TCP_IPV6),
557 1, (qedi_ep->vlan_id != 0));
558
559 conn_info->rcv_wnd_scale = 4;
560 conn_info->ts_ticks_per_second = 1000;
561 conn_info->da_timeout_value = 200;
562 conn_info->ack_frequency = 2;
563
564 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
565 "Default cq index [%d], mss [%d]\n",
566 conn_info->default_cq, conn_info->mss);
567
568 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
569 if (rval)
570 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
571 rval, qedi_ep);
572
573 kfree(conn_info);
574 return rval;
575 }
576
577 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
578 {
579 struct iscsi_conn *conn = cls_conn->dd_data;
580 struct qedi_conn *qedi_conn = conn->dd_data;
581 struct qedi_ctx *qedi;
582 int rval;
583
584 qedi = qedi_conn->qedi;
585
586 rval = qedi_iscsi_update_conn(qedi, qedi_conn);
587 if (rval) {
588 iscsi_conn_printk(KERN_ALERT, conn,
589 "conn_start: FW oflload conn failed.\n");
590 rval = -EINVAL;
591 goto start_err;
592 }
593
594 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
595 qedi_conn->abrt_conn = 0;
596
597 rval = iscsi_conn_start(cls_conn);
598 if (rval) {
599 iscsi_conn_printk(KERN_ALERT, conn,
600 "iscsi_conn_start: FW oflload conn failed!!\n");
601 }
602
603 start_err:
604 return rval;
605 }
606
607 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
608 {
609 struct iscsi_conn *conn = cls_conn->dd_data;
610 struct qedi_conn *qedi_conn = conn->dd_data;
611 struct Scsi_Host *shost;
612 struct qedi_ctx *qedi;
613
614 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
615 qedi = iscsi_host_priv(shost);
616
617 qedi_conn_free_login_resources(qedi, qedi_conn);
618 iscsi_conn_teardown(cls_conn);
619 }
620
621 static int qedi_ep_get_param(struct iscsi_endpoint *ep,
622 enum iscsi_param param, char *buf)
623 {
624 struct qedi_endpoint *qedi_ep = ep->dd_data;
625 int len;
626
627 if (!qedi_ep)
628 return -ENOTCONN;
629
630 switch (param) {
631 case ISCSI_PARAM_CONN_PORT:
632 len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
633 break;
634 case ISCSI_PARAM_CONN_ADDRESS:
635 if (qedi_ep->ip_type == TCP_IPV4)
636 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
637 else
638 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
639 break;
640 default:
641 return -ENOTCONN;
642 }
643
644 return len;
645 }
646
647 static int qedi_host_get_param(struct Scsi_Host *shost,
648 enum iscsi_host_param param, char *buf)
649 {
650 struct qedi_ctx *qedi;
651 int len;
652
653 qedi = iscsi_host_priv(shost);
654
655 switch (param) {
656 case ISCSI_HOST_PARAM_HWADDRESS:
657 len = sysfs_format_mac(buf, qedi->mac, 6);
658 break;
659 case ISCSI_HOST_PARAM_NETDEV_NAME:
660 len = sprintf(buf, "host%d\n", shost->host_no);
661 break;
662 case ISCSI_HOST_PARAM_IPADDRESS:
663 if (qedi->ip_type == TCP_IPV4)
664 len = sprintf(buf, "%pI4\n", qedi->src_ip);
665 else
666 len = sprintf(buf, "%pI6\n", qedi->src_ip);
667 break;
668 default:
669 return iscsi_host_get_param(shost, param, buf);
670 }
671
672 return len;
673 }
674
675 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
676 struct iscsi_stats *stats)
677 {
678 struct iscsi_conn *conn = cls_conn->dd_data;
679 struct qed_iscsi_stats iscsi_stats;
680 struct Scsi_Host *shost;
681 struct qedi_ctx *qedi;
682
683 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
684 qedi = iscsi_host_priv(shost);
685 qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
686
687 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
688 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
689 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
690 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
691 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
692
693 stats->txdata_octets = conn->txdata_octets;
694 stats->rxdata_octets = conn->rxdata_octets;
695 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
696 stats->dataout_pdus = conn->dataout_pdus_cnt;
697 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
698 stats->datain_pdus = conn->datain_pdus_cnt;
699 stats->r2t_pdus = conn->r2t_pdus_cnt;
700 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
701 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
702 stats->digest_err = 0;
703 stats->timeout_err = 0;
704 strcpy(stats->custom[0].desc, "eh_abort_cnt");
705 stats->custom[0].value = conn->eh_abort_cnt;
706 stats->custom_length = 1;
707 }
708
709 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
710 {
711 struct scsi_sge *bd_tbl;
712
713 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
714
715 bd_tbl->sge_addr.hi =
716 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
717 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
718 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
719 qedi_conn->gen_pdu.req_buf;
720 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
721 bd_tbl->sge_addr.hi =
722 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
723 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
724 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
725 }
726
727 static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
728 {
729 struct qedi_cmd *cmd = task->dd_data;
730 struct qedi_conn *qedi_conn = cmd->conn;
731 char *buf;
732 int data_len;
733 int rc = 0;
734
735 qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
736 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
737 case ISCSI_OP_LOGIN:
738 qedi_send_iscsi_login(qedi_conn, task);
739 break;
740 case ISCSI_OP_NOOP_OUT:
741 data_len = qedi_conn->gen_pdu.req_buf_size;
742 buf = qedi_conn->gen_pdu.req_buf;
743 if (data_len)
744 rc = qedi_send_iscsi_nopout(qedi_conn, task,
745 buf, data_len, 1);
746 else
747 rc = qedi_send_iscsi_nopout(qedi_conn, task,
748 NULL, 0, 1);
749 break;
750 case ISCSI_OP_LOGOUT:
751 rc = qedi_send_iscsi_logout(qedi_conn, task);
752 break;
753 case ISCSI_OP_SCSI_TMFUNC:
754 rc = qedi_iscsi_abort_work(qedi_conn, task);
755 break;
756 case ISCSI_OP_TEXT:
757 rc = qedi_send_iscsi_text(qedi_conn, task);
758 break;
759 default:
760 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
761 "unsupported op 0x%x\n", task->hdr->opcode);
762 }
763
764 return rc;
765 }
766
767 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
768 {
769 struct qedi_conn *qedi_conn = conn->dd_data;
770 struct qedi_cmd *cmd = task->dd_data;
771
772 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
773
774 qedi_conn->gen_pdu.req_buf_size = task->data_count;
775
776 if (task->data_count) {
777 memcpy(qedi_conn->gen_pdu.req_buf, task->data,
778 task->data_count);
779 qedi_conn->gen_pdu.req_wr_ptr =
780 qedi_conn->gen_pdu.req_buf + task->data_count;
781 }
782
783 cmd->conn = conn->dd_data;
784 cmd->scsi_cmd = NULL;
785 return qedi_iscsi_send_generic_request(task);
786 }
787
788 static int qedi_task_xmit(struct iscsi_task *task)
789 {
790 struct iscsi_conn *conn = task->conn;
791 struct qedi_conn *qedi_conn = conn->dd_data;
792 struct qedi_cmd *cmd = task->dd_data;
793 struct scsi_cmnd *sc = task->sc;
794
795 cmd->state = 0;
796 cmd->task = NULL;
797 cmd->use_slowpath = false;
798 cmd->conn = qedi_conn;
799 cmd->task = task;
800 cmd->io_cmd_in_list = false;
801 INIT_LIST_HEAD(&cmd->io_cmd);
802
803 if (!sc)
804 return qedi_mtask_xmit(conn, task);
805
806 cmd->scsi_cmd = sc;
807 return qedi_iscsi_send_ioreq(task);
808 }
809
810 static struct iscsi_endpoint *
811 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
812 int non_blocking)
813 {
814 struct qedi_ctx *qedi;
815 struct iscsi_endpoint *ep;
816 struct qedi_endpoint *qedi_ep;
817 struct sockaddr_in *addr;
818 struct sockaddr_in6 *addr6;
819 struct qed_dev *cdev = NULL;
820 struct qedi_uio_dev *udev = NULL;
821 struct iscsi_path path_req;
822 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
823 u32 iscsi_cid = QEDI_CID_RESERVED;
824 u16 len = 0;
825 char *buf = NULL;
826 int ret;
827
828 if (!shost) {
829 ret = -ENXIO;
830 QEDI_ERR(NULL, "shost is NULL\n");
831 return ERR_PTR(ret);
832 }
833
834 if (qedi_do_not_recover) {
835 ret = -ENOMEM;
836 return ERR_PTR(ret);
837 }
838
839 qedi = iscsi_host_priv(shost);
840 cdev = qedi->cdev;
841 udev = qedi->udev;
842
843 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
844 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
845 ret = -ENOMEM;
846 return ERR_PTR(ret);
847 }
848
849 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
850 if (!ep) {
851 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
852 ret = -ENOMEM;
853 return ERR_PTR(ret);
854 }
855 qedi_ep = ep->dd_data;
856 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
857 qedi_ep->state = EP_STATE_IDLE;
858 qedi_ep->iscsi_cid = (u32)-1;
859 qedi_ep->qedi = qedi;
860
861 if (dst_addr->sa_family == AF_INET) {
862 addr = (struct sockaddr_in *)dst_addr;
863 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
864 sizeof(struct in_addr));
865 qedi_ep->dst_port = ntohs(addr->sin_port);
866 qedi_ep->ip_type = TCP_IPV4;
867 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
868 "dst_addr=%pI4, dst_port=%u\n",
869 qedi_ep->dst_addr, qedi_ep->dst_port);
870 } else if (dst_addr->sa_family == AF_INET6) {
871 addr6 = (struct sockaddr_in6 *)dst_addr;
872 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
873 sizeof(struct in6_addr));
874 qedi_ep->dst_port = ntohs(addr6->sin6_port);
875 qedi_ep->ip_type = TCP_IPV6;
876 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
877 "dst_addr=%pI6, dst_port=%u\n",
878 qedi_ep->dst_addr, qedi_ep->dst_port);
879 } else {
880 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
881 }
882
883 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
884 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
885 ret = -ENXIO;
886 goto ep_conn_exit;
887 }
888
889 ret = qedi_alloc_sq(qedi, qedi_ep);
890 if (ret)
891 goto ep_conn_exit;
892
893 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
894 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
895
896 if (ret) {
897 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
898 ret = -ENXIO;
899 goto ep_free_sq;
900 }
901
902 iscsi_cid = qedi_ep->handle;
903 qedi_ep->iscsi_cid = iscsi_cid;
904
905 init_waitqueue_head(&qedi_ep->ofld_wait);
906 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
907 qedi_ep->state = EP_STATE_OFLDCONN_START;
908 qedi->ep_tbl[iscsi_cid] = qedi_ep;
909
910 buf = (char *)&path_req;
911 len = sizeof(path_req);
912 memset(&path_req, 0, len);
913
914 msg_type = ISCSI_KEVENT_PATH_REQ;
915 path_req.handle = (u64)qedi_ep->iscsi_cid;
916 path_req.pmtu = qedi->ll2_mtu;
917 qedi_ep->pmtu = qedi->ll2_mtu;
918 if (qedi_ep->ip_type == TCP_IPV4) {
919 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
920 sizeof(struct in_addr));
921 path_req.ip_addr_len = 4;
922 } else {
923 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
924 sizeof(struct in6_addr));
925 path_req.ip_addr_len = 16;
926 }
927
928 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
929 len);
930 if (ret) {
931 QEDI_ERR(&qedi->dbg_ctx,
932 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
933 iscsi_cid, ret);
934 goto ep_rel_conn;
935 }
936
937 atomic_inc(&qedi->num_offloads);
938 return ep;
939
940 ep_rel_conn:
941 qedi->ep_tbl[iscsi_cid] = NULL;
942 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
943 if (ret)
944 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
945 ret);
946 ep_free_sq:
947 qedi_free_sq(qedi, qedi_ep);
948 ep_conn_exit:
949 iscsi_destroy_endpoint(ep);
950 return ERR_PTR(ret);
951 }
952
953 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
954 {
955 struct qedi_endpoint *qedi_ep;
956 int ret = 0;
957
958 if (qedi_do_not_recover)
959 return 1;
960
961 qedi_ep = ep->dd_data;
962 if (qedi_ep->state == EP_STATE_IDLE ||
963 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
964 return -1;
965
966 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
967 ret = 1;
968
969 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
970 QEDI_OFLD_WAIT_STATE(qedi_ep),
971 msecs_to_jiffies(timeout_ms));
972
973 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
974 ret = -1;
975
976 if (ret > 0)
977 return 1;
978 else if (!ret)
979 return 0;
980 else
981 return ret;
982 }
983
984 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
985 {
986 struct qedi_cmd *cmd, *cmd_tmp;
987
988 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
989 io_cmd) {
990 list_del_init(&cmd->io_cmd);
991 qedi_conn->active_cmd_count--;
992 }
993 }
994
995 static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
996 {
997 struct qedi_endpoint *qedi_ep;
998 struct qedi_conn *qedi_conn = NULL;
999 struct iscsi_conn *conn = NULL;
1000 struct qedi_ctx *qedi;
1001 int ret = 0;
1002 int wait_delay = 20 * HZ;
1003 int abrt_conn = 0;
1004 int count = 10;
1005
1006 qedi_ep = ep->dd_data;
1007 qedi = qedi_ep->qedi;
1008
1009 flush_work(&qedi_ep->offload_work);
1010
1011 if (qedi_ep->conn) {
1012 qedi_conn = qedi_ep->conn;
1013 conn = qedi_conn->cls_conn->dd_data;
1014 iscsi_suspend_queue(conn);
1015 abrt_conn = qedi_conn->abrt_conn;
1016
1017 while (count--) {
1018 if (!test_bit(QEDI_CONN_FW_CLEANUP,
1019 &qedi_conn->flags)) {
1020 break;
1021 }
1022 msleep(1000);
1023 }
1024
1025 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
1026 if (qedi_do_not_recover) {
1027 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1028 "Do not recover cid=0x%x\n",
1029 qedi_ep->iscsi_cid);
1030 goto ep_exit_recover;
1031 }
1032 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1033 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
1034 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
1035 qedi_cleanup_active_cmd_list(qedi_conn);
1036 goto ep_release_conn;
1037 }
1038 }
1039
1040 if (qedi_do_not_recover)
1041 goto ep_exit_recover;
1042
1043 switch (qedi_ep->state) {
1044 case EP_STATE_OFLDCONN_START:
1045 goto ep_release_conn;
1046 case EP_STATE_OFLDCONN_FAILED:
1047 break;
1048 case EP_STATE_OFLDCONN_COMPL:
1049 if (unlikely(!qedi_conn))
1050 break;
1051
1052 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1053 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1054 qedi_conn->active_cmd_count, abrt_conn,
1055 qedi_ep->state,
1056 qedi_ep->iscsi_cid,
1057 qedi_ep->conn
1058 );
1059
1060 if (!qedi_conn->active_cmd_count)
1061 abrt_conn = 0;
1062 else
1063 abrt_conn = 1;
1064
1065 if (abrt_conn)
1066 qedi_clearsq(qedi, qedi_conn, NULL);
1067 break;
1068 default:
1069 break;
1070 }
1071
1072 qedi_ep->state = EP_STATE_DISCONN_START;
1073 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1074 if (ret) {
1075 QEDI_WARN(&qedi->dbg_ctx,
1076 "destroy_conn failed returned %d\n", ret);
1077 } else {
1078 ret = wait_event_interruptible_timeout(
1079 qedi_ep->tcp_ofld_wait,
1080 (qedi_ep->state !=
1081 EP_STATE_DISCONN_START),
1082 wait_delay);
1083 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1084 QEDI_WARN(&qedi->dbg_ctx,
1085 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1086 ret, wait_delay, qedi_ep->iscsi_cid);
1087 }
1088 }
1089
1090 ep_release_conn:
1091 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1092 if (ret)
1093 QEDI_WARN(&qedi->dbg_ctx,
1094 "release_conn returned %d, cid=0x%x\n",
1095 ret, qedi_ep->iscsi_cid);
1096 ep_exit_recover:
1097 qedi_ep->state = EP_STATE_IDLE;
1098 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1099 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1100 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1101 qedi_free_sq(qedi, qedi_ep);
1102
1103 if (qedi_conn)
1104 qedi_conn->ep = NULL;
1105
1106 qedi_ep->conn = NULL;
1107 qedi_ep->qedi = NULL;
1108 atomic_dec(&qedi->num_offloads);
1109
1110 iscsi_destroy_endpoint(ep);
1111 }
1112
1113 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1114 {
1115 struct qed_dev *cdev = qedi->cdev;
1116 struct qedi_uio_dev *udev;
1117 struct qedi_uio_ctrl *uctrl;
1118 struct sk_buff *skb;
1119 u32 len;
1120 int rc = 0;
1121
1122 udev = qedi->udev;
1123 if (!udev) {
1124 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1125 return -EINVAL;
1126 }
1127
1128 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1129 if (!uctrl) {
1130 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1131 return -EINVAL;
1132 }
1133
1134 len = uctrl->host_tx_pkt_len;
1135 if (!len) {
1136 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1137 return -EINVAL;
1138 }
1139
1140 skb = alloc_skb(len, GFP_ATOMIC);
1141 if (!skb) {
1142 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1143 return -EINVAL;
1144 }
1145
1146 skb_put(skb, len);
1147 memcpy(skb->data, udev->tx_pkt, len);
1148 skb->ip_summed = CHECKSUM_NONE;
1149
1150 if (vlanid)
1151 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1152
1153 rc = qedi_ops->ll2->start_xmit(cdev, skb);
1154 if (rc) {
1155 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1156 rc);
1157 kfree_skb(skb);
1158 }
1159
1160 uctrl->host_tx_pkt_len = 0;
1161 uctrl->hw_tx_cons++;
1162
1163 return rc;
1164 }
1165
1166 static void qedi_offload_work(struct work_struct *work)
1167 {
1168 struct qedi_endpoint *qedi_ep =
1169 container_of(work, struct qedi_endpoint, offload_work);
1170 struct qedi_ctx *qedi;
1171 int wait_delay = 20 * HZ;
1172 int ret;
1173
1174 qedi = qedi_ep->qedi;
1175
1176 ret = qedi_iscsi_offload_conn(qedi_ep);
1177 if (ret) {
1178 QEDI_ERR(&qedi->dbg_ctx,
1179 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1180 qedi_ep->iscsi_cid, qedi_ep, ret);
1181 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1182 return;
1183 }
1184
1185 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1186 (qedi_ep->state ==
1187 EP_STATE_OFLDCONN_COMPL),
1188 wait_delay);
1189 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1190 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1191 QEDI_ERR(&qedi->dbg_ctx,
1192 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1193 qedi_ep->iscsi_cid, qedi_ep);
1194 }
1195 }
1196
1197 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1198 {
1199 struct qedi_ctx *qedi;
1200 struct qedi_endpoint *qedi_ep;
1201 int ret = 0;
1202 u32 iscsi_cid;
1203 u16 port_id = 0;
1204
1205 if (!shost) {
1206 ret = -ENXIO;
1207 QEDI_ERR(NULL, "shost is NULL\n");
1208 return ret;
1209 }
1210
1211 if (strcmp(shost->hostt->proc_name, "qedi")) {
1212 ret = -ENXIO;
1213 QEDI_ERR(NULL, "shost %s is invalid\n",
1214 shost->hostt->proc_name);
1215 return ret;
1216 }
1217
1218 qedi = iscsi_host_priv(shost);
1219 if (path_data->handle == QEDI_PATH_HANDLE) {
1220 ret = qedi_data_avail(qedi, path_data->vlan_id);
1221 goto set_path_exit;
1222 }
1223
1224 iscsi_cid = (u32)path_data->handle;
1225 qedi_ep = qedi->ep_tbl[iscsi_cid];
1226 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1227 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
1228
1229 if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
1230 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
1231 ret = -EIO;
1232 goto set_path_exit;
1233 }
1234
1235 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
1236 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
1237
1238 qedi_ep->vlan_id = path_data->vlan_id;
1239 if (path_data->pmtu < DEF_PATH_MTU) {
1240 qedi_ep->pmtu = qedi->ll2_mtu;
1241 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1242 "MTU cannot be %u, using default MTU %u\n",
1243 path_data->pmtu, qedi_ep->pmtu);
1244 }
1245
1246 if (path_data->pmtu != qedi->ll2_mtu) {
1247 if (path_data->pmtu > JUMBO_MTU) {
1248 ret = -EINVAL;
1249 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
1250 goto set_path_exit;
1251 }
1252
1253 qedi_reset_host_mtu(qedi, path_data->pmtu);
1254 qedi_ep->pmtu = qedi->ll2_mtu;
1255 }
1256
1257 port_id = qedi_ep->src_port;
1258 if (port_id >= QEDI_LOCAL_PORT_MIN &&
1259 port_id < QEDI_LOCAL_PORT_MAX) {
1260 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
1261 port_id = 0;
1262 } else {
1263 port_id = 0;
1264 }
1265
1266 if (!port_id) {
1267 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
1268 if (port_id == QEDI_LOCAL_PORT_INVALID) {
1269 QEDI_ERR(&qedi->dbg_ctx,
1270 "Failed to allocate port id for iscsi_cid=0x%x\n",
1271 iscsi_cid);
1272 ret = -ENOMEM;
1273 goto set_path_exit;
1274 }
1275 }
1276
1277 qedi_ep->src_port = port_id;
1278
1279 if (qedi_ep->ip_type == TCP_IPV4) {
1280 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
1281 sizeof(struct in_addr));
1282 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
1283 sizeof(struct in_addr));
1284 qedi->ip_type = TCP_IPV4;
1285
1286 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1287 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
1288 qedi_ep->src_addr, qedi_ep->src_port,
1289 qedi_ep->dst_addr, qedi_ep->dst_port);
1290 } else {
1291 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
1292 sizeof(struct in6_addr));
1293 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
1294 sizeof(struct in6_addr));
1295 qedi->ip_type = TCP_IPV6;
1296
1297 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1298 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
1299 qedi_ep->src_addr, qedi_ep->src_port,
1300 qedi_ep->dst_addr, qedi_ep->dst_port);
1301 }
1302
1303 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
1304 queue_work(qedi->offload_thread, &qedi_ep->offload_work);
1305
1306 ret = 0;
1307
1308 set_path_exit:
1309 return ret;
1310 }
1311
1312 static umode_t qedi_attr_is_visible(int param_type, int param)
1313 {
1314 switch (param_type) {
1315 case ISCSI_HOST_PARAM:
1316 switch (param) {
1317 case ISCSI_HOST_PARAM_NETDEV_NAME:
1318 case ISCSI_HOST_PARAM_HWADDRESS:
1319 case ISCSI_HOST_PARAM_IPADDRESS:
1320 return 0444;
1321 default:
1322 return 0;
1323 }
1324 case ISCSI_PARAM:
1325 switch (param) {
1326 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1327 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1328 case ISCSI_PARAM_HDRDGST_EN:
1329 case ISCSI_PARAM_DATADGST_EN:
1330 case ISCSI_PARAM_CONN_ADDRESS:
1331 case ISCSI_PARAM_CONN_PORT:
1332 case ISCSI_PARAM_EXP_STATSN:
1333 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1334 case ISCSI_PARAM_PERSISTENT_PORT:
1335 case ISCSI_PARAM_PING_TMO:
1336 case ISCSI_PARAM_RECV_TMO:
1337 case ISCSI_PARAM_INITIAL_R2T_EN:
1338 case ISCSI_PARAM_MAX_R2T:
1339 case ISCSI_PARAM_IMM_DATA_EN:
1340 case ISCSI_PARAM_FIRST_BURST:
1341 case ISCSI_PARAM_MAX_BURST:
1342 case ISCSI_PARAM_PDU_INORDER_EN:
1343 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1344 case ISCSI_PARAM_ERL:
1345 case ISCSI_PARAM_TARGET_NAME:
1346 case ISCSI_PARAM_TPGT:
1347 case ISCSI_PARAM_USERNAME:
1348 case ISCSI_PARAM_PASSWORD:
1349 case ISCSI_PARAM_USERNAME_IN:
1350 case ISCSI_PARAM_PASSWORD_IN:
1351 case ISCSI_PARAM_FAST_ABORT:
1352 case ISCSI_PARAM_ABORT_TMO:
1353 case ISCSI_PARAM_LU_RESET_TMO:
1354 case ISCSI_PARAM_TGT_RESET_TMO:
1355 case ISCSI_PARAM_IFACE_NAME:
1356 case ISCSI_PARAM_INITIATOR_NAME:
1357 case ISCSI_PARAM_BOOT_ROOT:
1358 case ISCSI_PARAM_BOOT_NIC:
1359 case ISCSI_PARAM_BOOT_TARGET:
1360 return 0444;
1361 default:
1362 return 0;
1363 }
1364 }
1365
1366 return 0;
1367 }
1368
1369 static void qedi_cleanup_task(struct iscsi_task *task)
1370 {
1371 if (!task->sc || task->state == ISCSI_TASK_PENDING) {
1372 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
1373 refcount_read(&task->refcount));
1374 return;
1375 }
1376
1377 qedi_iscsi_unmap_sg_list(task->dd_data);
1378 }
1379
1380 struct iscsi_transport qedi_iscsi_transport = {
1381 .owner = THIS_MODULE,
1382 .name = QEDI_MODULE_NAME,
1383 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
1384 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
1385 .create_session = qedi_session_create,
1386 .destroy_session = qedi_session_destroy,
1387 .create_conn = qedi_conn_create,
1388 .bind_conn = qedi_conn_bind,
1389 .start_conn = qedi_conn_start,
1390 .stop_conn = iscsi_conn_stop,
1391 .destroy_conn = qedi_conn_destroy,
1392 .set_param = iscsi_set_param,
1393 .get_ep_param = qedi_ep_get_param,
1394 .get_conn_param = iscsi_conn_get_param,
1395 .get_session_param = iscsi_session_get_param,
1396 .get_host_param = qedi_host_get_param,
1397 .send_pdu = iscsi_conn_send_pdu,
1398 .get_stats = qedi_conn_get_stats,
1399 .xmit_task = qedi_task_xmit,
1400 .cleanup_task = qedi_cleanup_task,
1401 .session_recovery_timedout = iscsi_session_recovery_timedout,
1402 .ep_connect = qedi_ep_connect,
1403 .ep_poll = qedi_ep_poll,
1404 .ep_disconnect = qedi_ep_disconnect,
1405 .set_path = qedi_set_path,
1406 .attr_is_visible = qedi_attr_is_visible,
1407 };
1408
1409 void qedi_start_conn_recovery(struct qedi_ctx *qedi,
1410 struct qedi_conn *qedi_conn)
1411 {
1412 struct iscsi_cls_session *cls_sess;
1413 struct iscsi_cls_conn *cls_conn;
1414 struct iscsi_conn *conn;
1415
1416 cls_conn = qedi_conn->cls_conn;
1417 conn = cls_conn->dd_data;
1418 cls_sess = iscsi_conn_to_session(cls_conn);
1419
1420 if (iscsi_is_session_online(cls_sess)) {
1421 qedi_conn->abrt_conn = 1;
1422 QEDI_ERR(&qedi->dbg_ctx,
1423 "Failing connection, state=0x%x, cid=0x%x\n",
1424 conn->session->state, qedi_conn->iscsi_conn_id);
1425 iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
1426 ISCSI_ERR_CONN_FAILED);
1427 }
1428 }
1429
1430 static const struct {
1431 enum iscsi_error_types error_code;
1432 char *err_string;
1433 } qedi_iscsi_error[] = {
1434 { ISCSI_STATUS_NONE,
1435 "tcp_error none"
1436 },
1437 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
1438 "task cid mismatch"
1439 },
1440 { ISCSI_CONN_ERROR_TASK_NOT_VALID,
1441 "invalid task"
1442 },
1443 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
1444 "rq ring full"
1445 },
1446 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
1447 "cmdq ring full"
1448 },
1449 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
1450 "sge caching failed"
1451 },
1452 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
1453 "hdr digest error"
1454 },
1455 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
1456 "local cmpl error"
1457 },
1458 { ISCSI_CONN_ERROR_DATA_OVERRUN,
1459 "invalid task"
1460 },
1461 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
1462 "out of sge error"
1463 },
1464 { ISCSI_CONN_ERROR_TCP_SEG_PROC_IP_OPTIONS_ERROR,
1465 "tcp seg ip options 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
1544 char *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
1558 void qedi_process_iscsi_error(struct qedi_endpoint *ep, struct async_data *data)
1559 {
1560 struct qedi_conn *qedi_conn;
1561 struct qedi_ctx *qedi;
1562 char warn_notice[] = "iscsi_warning";
1563 char error_notice[] = "iscsi_error";
1564 char unknown_msg[] = "Unknown error";
1565 char *message;
1566 int need_recovery = 0;
1567 u32 err_mask = 0;
1568 char *msg;
1569
1570 if (!ep)
1571 return;
1572
1573 qedi_conn = ep->conn;
1574 if (!qedi_conn)
1575 return;
1576
1577 qedi = ep->qedi;
1578
1579 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
1580 data->error_code);
1581
1582 if (err_mask) {
1583 need_recovery = 0;
1584 message = warn_notice;
1585 } else {
1586 need_recovery = 1;
1587 message = error_notice;
1588 }
1589
1590 msg = qedi_get_iscsi_error(data->error_code);
1591 if (!msg) {
1592 need_recovery = 0;
1593 msg = unknown_msg;
1594 }
1595
1596 iscsi_conn_printk(KERN_ALERT,
1597 qedi_conn->cls_conn->dd_data,
1598 "qedi: %s - %s\n", message, msg);
1599
1600 if (need_recovery)
1601 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1602 }
1603
1604 void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data)
1605 {
1606 struct qedi_conn *qedi_conn;
1607
1608 if (!ep)
1609 return;
1610
1611 qedi_conn = ep->conn;
1612 if (!qedi_conn)
1613 return;
1614
1615 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
1616 data->error_code);
1617
1618 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1619 }
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