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Linux 4.18.10
[linux/fpc-iii.git] / drivers / scsi / qedi / qedi_iscsi.c
blob2f0a4f2c5ff803fbc663093b9118479219c5a1f3
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 .dma_boundary = QEDI_HW_DMA_BOUNDARY,
63 .cmd_per_lun = 128,
64 .use_clustering = ENABLE_CLUSTERING,
65 .shost_attrs = qedi_shost_attrs,
66 };
67
68 static void qedi_conn_free_login_resources(struct qedi_ctx *qedi,
69 struct qedi_conn *qedi_conn)
70 {
71 if (qedi_conn->gen_pdu.resp_bd_tbl) {
72 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
73 qedi_conn->gen_pdu.resp_bd_tbl,
74 qedi_conn->gen_pdu.resp_bd_dma);
75 qedi_conn->gen_pdu.resp_bd_tbl = NULL;
76 }
77
78 if (qedi_conn->gen_pdu.req_bd_tbl) {
79 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
80 qedi_conn->gen_pdu.req_bd_tbl,
81 qedi_conn->gen_pdu.req_bd_dma);
82 qedi_conn->gen_pdu.req_bd_tbl = NULL;
83 }
84
85 if (qedi_conn->gen_pdu.resp_buf) {
86 dma_free_coherent(&qedi->pdev->dev,
87 ISCSI_DEF_MAX_RECV_SEG_LEN,
88 qedi_conn->gen_pdu.resp_buf,
89 qedi_conn->gen_pdu.resp_dma_addr);
90 qedi_conn->gen_pdu.resp_buf = NULL;
91 }
92
93 if (qedi_conn->gen_pdu.req_buf) {
94 dma_free_coherent(&qedi->pdev->dev,
95 ISCSI_DEF_MAX_RECV_SEG_LEN,
96 qedi_conn->gen_pdu.req_buf,
97 qedi_conn->gen_pdu.req_dma_addr);
98 qedi_conn->gen_pdu.req_buf = NULL;
99 }
100 }
101
102 static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi,
103 struct qedi_conn *qedi_conn)
104 {
105 qedi_conn->gen_pdu.req_buf =
106 dma_alloc_coherent(&qedi->pdev->dev,
107 ISCSI_DEF_MAX_RECV_SEG_LEN,
108 &qedi_conn->gen_pdu.req_dma_addr,
109 GFP_KERNEL);
110 if (!qedi_conn->gen_pdu.req_buf)
111 goto login_req_buf_failure;
112
113 qedi_conn->gen_pdu.req_buf_size = 0;
114 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf;
115
116 qedi_conn->gen_pdu.resp_buf =
117 dma_alloc_coherent(&qedi->pdev->dev,
118 ISCSI_DEF_MAX_RECV_SEG_LEN,
119 &qedi_conn->gen_pdu.resp_dma_addr,
120 GFP_KERNEL);
121 if (!qedi_conn->gen_pdu.resp_buf)
122 goto login_resp_buf_failure;
123
124 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
125 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf;
126
127 qedi_conn->gen_pdu.req_bd_tbl =
128 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
129 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
130 if (!qedi_conn->gen_pdu.req_bd_tbl)
131 goto login_req_bd_tbl_failure;
132
133 qedi_conn->gen_pdu.resp_bd_tbl =
134 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
135 &qedi_conn->gen_pdu.resp_bd_dma,
136 GFP_KERNEL);
137 if (!qedi_conn->gen_pdu.resp_bd_tbl)
138 goto login_resp_bd_tbl_failure;
139
140 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS,
141 "Allocation successful, cid=0x%x\n",
142 qedi_conn->iscsi_conn_id);
143 return 0;
144
145 login_resp_bd_tbl_failure:
146 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
147 qedi_conn->gen_pdu.req_bd_tbl,
148 qedi_conn->gen_pdu.req_bd_dma);
149 qedi_conn->gen_pdu.req_bd_tbl = NULL;
150
151 login_req_bd_tbl_failure:
152 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
153 qedi_conn->gen_pdu.resp_buf,
154 qedi_conn->gen_pdu.resp_dma_addr);
155 qedi_conn->gen_pdu.resp_buf = NULL;
156 login_resp_buf_failure:
157 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
158 qedi_conn->gen_pdu.req_buf,
159 qedi_conn->gen_pdu.req_dma_addr);
160 qedi_conn->gen_pdu.req_buf = NULL;
161 login_req_buf_failure:
162 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data,
163 "login resource alloc failed!!\n");
164 return -ENOMEM;
165 }
166
167 static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi,
168 struct iscsi_session *session)
169 {
170 int i;
171
172 for (i = 0; i < session->cmds_max; i++) {
173 struct iscsi_task *task = session->cmds[i];
174 struct qedi_cmd *cmd = task->dd_data;
175
176 if (cmd->io_tbl.sge_tbl)
177 dma_free_coherent(&qedi->pdev->dev,
178 QEDI_ISCSI_MAX_BDS_PER_CMD *
179 sizeof(struct scsi_sge),
180 cmd->io_tbl.sge_tbl,
181 cmd->io_tbl.sge_tbl_dma);
182
183 if (cmd->sense_buffer)
184 dma_free_coherent(&qedi->pdev->dev,
185 SCSI_SENSE_BUFFERSIZE,
186 cmd->sense_buffer,
187 cmd->sense_buffer_dma);
188 }
189 }
190
191 static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session,
192 struct qedi_cmd *cmd)
193 {
194 struct qedi_io_bdt *io = &cmd->io_tbl;
195 struct scsi_sge *sge;
196
197 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev,
198 QEDI_ISCSI_MAX_BDS_PER_CMD *
199 sizeof(*sge),
200 &io->sge_tbl_dma, GFP_KERNEL);
201 if (!io->sge_tbl) {
202 iscsi_session_printk(KERN_ERR, session,
203 "Could not allocate BD table.\n");
204 return -ENOMEM;
205 }
206
207 io->sge_valid = 0;
208 return 0;
209 }
210
211 static int qedi_setup_cmd_pool(struct qedi_ctx *qedi,
212 struct iscsi_session *session)
213 {
214 int i;
215
216 for (i = 0; i < session->cmds_max; i++) {
217 struct iscsi_task *task = session->cmds[i];
218 struct qedi_cmd *cmd = task->dd_data;
219
220 task->hdr = &cmd->hdr;
221 task->hdr_max = sizeof(struct iscsi_hdr);
222
223 if (qedi_alloc_sget(qedi, session, cmd))
224 goto free_sgets;
225
226 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev,
227 SCSI_SENSE_BUFFERSIZE,
228 &cmd->sense_buffer_dma,
229 GFP_KERNEL);
230 if (!cmd->sense_buffer)
231 goto free_sgets;
232 }
233
234 return 0;
235
236 free_sgets:
237 qedi_destroy_cmd_pool(qedi, session);
238 return -ENOMEM;
239 }
240
241 static struct iscsi_cls_session *
242 qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max,
243 u16 qdepth, uint32_t initial_cmdsn)
244 {
245 struct Scsi_Host *shost;
246 struct iscsi_cls_session *cls_session;
247 struct qedi_ctx *qedi;
248 struct qedi_endpoint *qedi_ep;
249
250 if (!ep)
251 return NULL;
252
253 qedi_ep = ep->dd_data;
254 shost = qedi_ep->qedi->shost;
255 qedi = iscsi_host_priv(shost);
256
257 if (cmds_max > qedi->max_sqes)
258 cmds_max = qedi->max_sqes;
259 else if (cmds_max < QEDI_SQ_WQES_MIN)
260 cmds_max = QEDI_SQ_WQES_MIN;
261
262 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost,
263 cmds_max, 0, sizeof(struct qedi_cmd),
264 initial_cmdsn, ISCSI_MAX_TARGET);
265 if (!cls_session) {
266 QEDI_ERR(&qedi->dbg_ctx,
267 "Failed to setup session for ep=%p\n", qedi_ep);
268 return NULL;
269 }
270
271 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) {
272 QEDI_ERR(&qedi->dbg_ctx,
273 "Failed to setup cmd pool for ep=%p\n", qedi_ep);
274 goto session_teardown;
275 }
276
277 return cls_session;
278
279 session_teardown:
280 iscsi_session_teardown(cls_session);
281 return NULL;
282 }
283
284 static void qedi_session_destroy(struct iscsi_cls_session *cls_session)
285 {
286 struct iscsi_session *session = cls_session->dd_data;
287 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
288 struct qedi_ctx *qedi = iscsi_host_priv(shost);
289
290 qedi_destroy_cmd_pool(qedi, session);
291 iscsi_session_teardown(cls_session);
292 }
293
294 static struct iscsi_cls_conn *
295 qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
296 {
297 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
298 struct qedi_ctx *qedi = iscsi_host_priv(shost);
299 struct iscsi_cls_conn *cls_conn;
300 struct qedi_conn *qedi_conn;
301 struct iscsi_conn *conn;
302
303 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn),
304 cid);
305 if (!cls_conn) {
306 QEDI_ERR(&qedi->dbg_ctx,
307 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n",
308 cid, cls_session);
309 return NULL;
310 }
311
312 conn = cls_conn->dd_data;
313 qedi_conn = conn->dd_data;
314 qedi_conn->cls_conn = cls_conn;
315 qedi_conn->qedi = qedi;
316 qedi_conn->ep = NULL;
317 qedi_conn->active_cmd_count = 0;
318 INIT_LIST_HEAD(&qedi_conn->active_cmd_list);
319 spin_lock_init(&qedi_conn->list_lock);
320
321 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) {
322 iscsi_conn_printk(KERN_ALERT, conn,
323 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n",
324 cid, cls_session);
325 goto free_conn;
326 }
327
328 return cls_conn;
329
330 free_conn:
331 iscsi_conn_teardown(cls_conn);
332 return NULL;
333 }
334
335 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
336 {
337 iscsi_block_session(cls_session);
338 }
339
340 void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
341 {
342 iscsi_unblock_session(cls_session);
343 }
344
345 static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi,
346 struct qedi_conn *qedi_conn)
347 {
348 u32 iscsi_cid = qedi_conn->iscsi_conn_id;
349
350 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) {
351 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
352 "conn bind - entry #%d not free\n",
353 iscsi_cid);
354 return -EBUSY;
355 }
356
357 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn;
358 return 0;
359 }
360
361 struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid)
362 {
363 if (!qedi->cid_que.conn_cid_tbl) {
364 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n");
365 return NULL;
366
367 } else if (iscsi_cid >= qedi->max_active_conns) {
368 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid);
369 return NULL;
370 }
371 return qedi->cid_que.conn_cid_tbl[iscsi_cid];
372 }
373
374 static int qedi_conn_bind(struct iscsi_cls_session *cls_session,
375 struct iscsi_cls_conn *cls_conn,
376 u64 transport_fd, int is_leading)
377 {
378 struct iscsi_conn *conn = cls_conn->dd_data;
379 struct qedi_conn *qedi_conn = conn->dd_data;
380 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
381 struct qedi_ctx *qedi = iscsi_host_priv(shost);
382 struct qedi_endpoint *qedi_ep;
383 struct iscsi_endpoint *ep;
384
385 ep = iscsi_lookup_endpoint(transport_fd);
386 if (!ep)
387 return -EINVAL;
388
389 qedi_ep = ep->dd_data;
390 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) ||
391 (qedi_ep->state == EP_STATE_TCP_RST_RCVD))
392 return -EINVAL;
393
394 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
395 return -EINVAL;
396
397 qedi_ep->conn = qedi_conn;
398 qedi_conn->ep = qedi_ep;
399 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
400 qedi_conn->fw_cid = qedi_ep->fw_cid;
401 qedi_conn->cmd_cleanup_req = 0;
402 qedi_conn->cmd_cleanup_cmpl = 0;
403
404 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn))
405 return -EINVAL;
406
407 spin_lock_init(&qedi_conn->tmf_work_lock);
408 INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
409 init_waitqueue_head(&qedi_conn->wait_queue);
410 return 0;
411 }
412
413 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
414 struct qedi_conn *qedi_conn)
415 {
416 struct qed_iscsi_params_update *conn_info;
417 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
418 struct iscsi_conn *conn = cls_conn->dd_data;
419 struct qedi_endpoint *qedi_ep;
420 int rval;
421
422 qedi_ep = qedi_conn->ep;
423
424 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
425 if (!conn_info) {
426 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
427 return -ENOMEM;
428 }
429
430 conn_info->update_flag = 0;
431
432 if (conn->hdrdgst_en)
433 SET_FIELD(conn_info->update_flag,
434 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
435 if (conn->datadgst_en)
436 SET_FIELD(conn_info->update_flag,
437 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
438 if (conn->session->initial_r2t_en)
439 SET_FIELD(conn_info->update_flag,
440 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
441 true);
442 if (conn->session->imm_data_en)
443 SET_FIELD(conn_info->update_flag,
444 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
445 true);
446
447 conn_info->max_seq_size = conn->session->max_burst;
448 conn_info->max_recv_pdu_length = conn->max_recv_dlength;
449 conn_info->max_send_pdu_length = conn->max_xmit_dlength;
450 conn_info->first_seq_length = conn->session->first_burst;
451 conn_info->exp_stat_sn = conn->exp_statsn;
452
453 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
454 conn_info);
455 if (rval) {
456 rval = -ENXIO;
457 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
458 }
459
460 kfree(conn_info);
461 return rval;
462 }
463
464 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
465 {
466 u16 mss = 0;
467 u16 hdrs = TCP_HDR_LEN;
468
469 if (is_ipv6)
470 hdrs += IPV6_HDR_LEN;
471 else
472 hdrs += IPV4_HDR_LEN;
473
474 mss = pmtu - hdrs;
475
476 if (!mss)
477 mss = DEF_MSS;
478
479 return mss;
480 }
481
482 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
483 {
484 struct qedi_ctx *qedi = qedi_ep->qedi;
485 struct qed_iscsi_params_offload *conn_info;
486 int rval;
487 int i;
488
489 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
490 if (!conn_info) {
491 QEDI_ERR(&qedi->dbg_ctx,
492 "Failed to allocate memory ep=%p\n", qedi_ep);
493 return -ENOMEM;
494 }
495
496 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
497 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
498
499 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
500 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
501
502 if (qedi_ep->ip_type == TCP_IPV4) {
503 conn_info->ip_version = 0;
504 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
505 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
506 qedi_ep->src_addr, qedi_ep->dst_addr);
507 } else {
508 for (i = 1; i < 4; i++) {
509 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
510 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
511 }
512
513 conn_info->ip_version = 1;
514 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
515 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
516 qedi_ep->src_addr, qedi_ep->dst_addr);
517 }
518
519 conn_info->src.port = qedi_ep->src_port;
520 conn_info->dst.port = qedi_ep->dst_port;
521
522 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
523 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
524 conn_info->vlan_id = qedi_ep->vlan_id;
525
526 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
527 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
528 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
529 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
530
531 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues);
532
533 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
534 conn_info->dup_ack_theshold = 3;
535 conn_info->rcv_wnd = 65535;
536
537 conn_info->ss_thresh = 65535;
538 conn_info->srtt = 300;
539 conn_info->rtt_var = 150;
540 conn_info->flow_label = 0;
541 conn_info->ka_timeout = DEF_KA_TIMEOUT;
542 conn_info->ka_interval = DEF_KA_INTERVAL;
543 conn_info->max_rt_time = DEF_MAX_RT_TIME;
544 conn_info->ttl = DEF_TTL;
545 conn_info->tos_or_tc = DEF_TOS;
546 conn_info->remote_port = qedi_ep->dst_port;
547 conn_info->local_port = qedi_ep->src_port;
548
549 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
550 (qedi_ep->ip_type == TCP_IPV6),
551 1, (qedi_ep->vlan_id != 0));
552
553 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss;
554 conn_info->rcv_wnd_scale = 4;
555 conn_info->da_timeout_value = 200;
556 conn_info->ack_frequency = 2;
557
558 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
559 "Default cq index [%d], mss [%d]\n",
560 conn_info->default_cq, conn_info->mss);
561
562 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
563 if (rval)
564 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
565 rval, qedi_ep);
566
567 kfree(conn_info);
568 return rval;
569 }
570
571 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
572 {
573 struct iscsi_conn *conn = cls_conn->dd_data;
574 struct qedi_conn *qedi_conn = conn->dd_data;
575 struct qedi_ctx *qedi;
576 int rval;
577
578 qedi = qedi_conn->qedi;
579
580 rval = qedi_iscsi_update_conn(qedi, qedi_conn);
581 if (rval) {
582 iscsi_conn_printk(KERN_ALERT, conn,
583 "conn_start: FW oflload conn failed.\n");
584 rval = -EINVAL;
585 goto start_err;
586 }
587
588 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
589 qedi_conn->abrt_conn = 0;
590
591 rval = iscsi_conn_start(cls_conn);
592 if (rval) {
593 iscsi_conn_printk(KERN_ALERT, conn,
594 "iscsi_conn_start: FW oflload conn failed!!\n");
595 }
596
597 start_err:
598 return rval;
599 }
600
601 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
602 {
603 struct iscsi_conn *conn = cls_conn->dd_data;
604 struct qedi_conn *qedi_conn = conn->dd_data;
605 struct Scsi_Host *shost;
606 struct qedi_ctx *qedi;
607
608 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
609 qedi = iscsi_host_priv(shost);
610
611 qedi_conn_free_login_resources(qedi, qedi_conn);
612 iscsi_conn_teardown(cls_conn);
613 }
614
615 static int qedi_ep_get_param(struct iscsi_endpoint *ep,
616 enum iscsi_param param, char *buf)
617 {
618 struct qedi_endpoint *qedi_ep = ep->dd_data;
619 int len;
620
621 if (!qedi_ep)
622 return -ENOTCONN;
623
624 switch (param) {
625 case ISCSI_PARAM_CONN_PORT:
626 len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
627 break;
628 case ISCSI_PARAM_CONN_ADDRESS:
629 if (qedi_ep->ip_type == TCP_IPV4)
630 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
631 else
632 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
633 break;
634 default:
635 return -ENOTCONN;
636 }
637
638 return len;
639 }
640
641 static int qedi_host_get_param(struct Scsi_Host *shost,
642 enum iscsi_host_param param, char *buf)
643 {
644 struct qedi_ctx *qedi;
645 int len;
646
647 qedi = iscsi_host_priv(shost);
648
649 switch (param) {
650 case ISCSI_HOST_PARAM_HWADDRESS:
651 len = sysfs_format_mac(buf, qedi->mac, 6);
652 break;
653 case ISCSI_HOST_PARAM_NETDEV_NAME:
654 len = sprintf(buf, "host%d\n", shost->host_no);
655 break;
656 case ISCSI_HOST_PARAM_IPADDRESS:
657 if (qedi->ip_type == TCP_IPV4)
658 len = sprintf(buf, "%pI4\n", qedi->src_ip);
659 else
660 len = sprintf(buf, "%pI6\n", qedi->src_ip);
661 break;
662 default:
663 return iscsi_host_get_param(shost, param, buf);
664 }
665
666 return len;
667 }
668
669 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
670 struct iscsi_stats *stats)
671 {
672 struct iscsi_conn *conn = cls_conn->dd_data;
673 struct qed_iscsi_stats iscsi_stats;
674 struct Scsi_Host *shost;
675 struct qedi_ctx *qedi;
676
677 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
678 qedi = iscsi_host_priv(shost);
679 qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
680
681 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
682 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
683 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
684 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
685 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
686
687 stats->txdata_octets = conn->txdata_octets;
688 stats->rxdata_octets = conn->rxdata_octets;
689 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
690 stats->dataout_pdus = conn->dataout_pdus_cnt;
691 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
692 stats->datain_pdus = conn->datain_pdus_cnt;
693 stats->r2t_pdus = conn->r2t_pdus_cnt;
694 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
695 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
696 stats->digest_err = 0;
697 stats->timeout_err = 0;
698 strcpy(stats->custom[0].desc, "eh_abort_cnt");
699 stats->custom[0].value = conn->eh_abort_cnt;
700 stats->custom_length = 1;
701 }
702
703 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
704 {
705 struct scsi_sge *bd_tbl;
706
707 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
708
709 bd_tbl->sge_addr.hi =
710 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
711 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
712 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
713 qedi_conn->gen_pdu.req_buf;
714 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
715 bd_tbl->sge_addr.hi =
716 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
717 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
718 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
719 }
720
721 static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
722 {
723 struct qedi_cmd *cmd = task->dd_data;
724 struct qedi_conn *qedi_conn = cmd->conn;
725 char *buf;
726 int data_len;
727 int rc = 0;
728
729 qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
730 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
731 case ISCSI_OP_LOGIN:
732 qedi_send_iscsi_login(qedi_conn, task);
733 break;
734 case ISCSI_OP_NOOP_OUT:
735 data_len = qedi_conn->gen_pdu.req_buf_size;
736 buf = qedi_conn->gen_pdu.req_buf;
737 if (data_len)
738 rc = qedi_send_iscsi_nopout(qedi_conn, task,
739 buf, data_len, 1);
740 else
741 rc = qedi_send_iscsi_nopout(qedi_conn, task,
742 NULL, 0, 1);
743 break;
744 case ISCSI_OP_LOGOUT:
745 rc = qedi_send_iscsi_logout(qedi_conn, task);
746 break;
747 case ISCSI_OP_SCSI_TMFUNC:
748 rc = qedi_iscsi_abort_work(qedi_conn, task);
749 break;
750 case ISCSI_OP_TEXT:
751 rc = qedi_send_iscsi_text(qedi_conn, task);
752 break;
753 default:
754 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
755 "unsupported op 0x%x\n", task->hdr->opcode);
756 }
757
758 return rc;
759 }
760
761 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
762 {
763 struct qedi_conn *qedi_conn = conn->dd_data;
764 struct qedi_cmd *cmd = task->dd_data;
765
766 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
767
768 qedi_conn->gen_pdu.req_buf_size = task->data_count;
769
770 if (task->data_count) {
771 memcpy(qedi_conn->gen_pdu.req_buf, task->data,
772 task->data_count);
773 qedi_conn->gen_pdu.req_wr_ptr =
774 qedi_conn->gen_pdu.req_buf + task->data_count;
775 }
776
777 cmd->conn = conn->dd_data;
778 cmd->scsi_cmd = NULL;
779 return qedi_iscsi_send_generic_request(task);
780 }
781
782 static int qedi_task_xmit(struct iscsi_task *task)
783 {
784 struct iscsi_conn *conn = task->conn;
785 struct qedi_conn *qedi_conn = conn->dd_data;
786 struct qedi_cmd *cmd = task->dd_data;
787 struct scsi_cmnd *sc = task->sc;
788
789 cmd->state = 0;
790 cmd->task = NULL;
791 cmd->use_slowpath = false;
792 cmd->conn = qedi_conn;
793 cmd->task = task;
794 cmd->io_cmd_in_list = false;
795 INIT_LIST_HEAD(&cmd->io_cmd);
796
797 if (!sc)
798 return qedi_mtask_xmit(conn, task);
799
800 cmd->scsi_cmd = sc;
801 return qedi_iscsi_send_ioreq(task);
802 }
803
804 static struct iscsi_endpoint *
805 qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
806 int non_blocking)
807 {
808 struct qedi_ctx *qedi;
809 struct iscsi_endpoint *ep;
810 struct qedi_endpoint *qedi_ep;
811 struct sockaddr_in *addr;
812 struct sockaddr_in6 *addr6;
813 struct qed_dev *cdev = NULL;
814 struct qedi_uio_dev *udev = NULL;
815 struct iscsi_path path_req;
816 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
817 u32 iscsi_cid = QEDI_CID_RESERVED;
818 u16 len = 0;
819 char *buf = NULL;
820 int ret, tmp;
821
822 if (!shost) {
823 ret = -ENXIO;
824 QEDI_ERR(NULL, "shost is NULL\n");
825 return ERR_PTR(ret);
826 }
827
828 if (qedi_do_not_recover) {
829 ret = -ENOMEM;
830 return ERR_PTR(ret);
831 }
832
833 qedi = iscsi_host_priv(shost);
834 cdev = qedi->cdev;
835 udev = qedi->udev;
836
837 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
838 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
839 ret = -ENOMEM;
840 return ERR_PTR(ret);
841 }
842
843 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
844 if (!ep) {
845 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
846 ret = -ENOMEM;
847 return ERR_PTR(ret);
848 }
849 qedi_ep = ep->dd_data;
850 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
851 qedi_ep->state = EP_STATE_IDLE;
852 qedi_ep->iscsi_cid = (u32)-1;
853 qedi_ep->qedi = qedi;
854
855 if (dst_addr->sa_family == AF_INET) {
856 addr = (struct sockaddr_in *)dst_addr;
857 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
858 sizeof(struct in_addr));
859 qedi_ep->dst_port = ntohs(addr->sin_port);
860 qedi_ep->ip_type = TCP_IPV4;
861 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
862 "dst_addr=%pI4, dst_port=%u\n",
863 qedi_ep->dst_addr, qedi_ep->dst_port);
864 } else if (dst_addr->sa_family == AF_INET6) {
865 addr6 = (struct sockaddr_in6 *)dst_addr;
866 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
867 sizeof(struct in6_addr));
868 qedi_ep->dst_port = ntohs(addr6->sin6_port);
869 qedi_ep->ip_type = TCP_IPV6;
870 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
871 "dst_addr=%pI6, dst_port=%u\n",
872 qedi_ep->dst_addr, qedi_ep->dst_port);
873 } else {
874 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
875 }
876
877 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
878 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
879 ret = -ENXIO;
880 goto ep_conn_exit;
881 }
882
883 ret = qedi_alloc_sq(qedi, qedi_ep);
884 if (ret)
885 goto ep_conn_exit;
886
887 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
888 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
889
890 if (ret) {
891 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
892 ret = -ENXIO;
893 goto ep_free_sq;
894 }
895
896 iscsi_cid = qedi_ep->handle;
897 qedi_ep->iscsi_cid = iscsi_cid;
898
899 init_waitqueue_head(&qedi_ep->ofld_wait);
900 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
901 qedi_ep->state = EP_STATE_OFLDCONN_START;
902 qedi->ep_tbl[iscsi_cid] = qedi_ep;
903
904 buf = (char *)&path_req;
905 len = sizeof(path_req);
906 memset(&path_req, 0, len);
907
908 msg_type = ISCSI_KEVENT_PATH_REQ;
909 path_req.handle = (u64)qedi_ep->iscsi_cid;
910 path_req.pmtu = qedi->ll2_mtu;
911 qedi_ep->pmtu = qedi->ll2_mtu;
912 if (qedi_ep->ip_type == TCP_IPV4) {
913 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
914 sizeof(struct in_addr));
915 path_req.ip_addr_len = 4;
916 } else {
917 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
918 sizeof(struct in6_addr));
919 path_req.ip_addr_len = 16;
920 }
921
922 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
923 len);
924 if (ret) {
925 QEDI_ERR(&qedi->dbg_ctx,
926 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
927 iscsi_cid, ret);
928 goto ep_rel_conn;
929 }
930
931 atomic_inc(&qedi->num_offloads);
932 return ep;
933
934 ep_rel_conn:
935 qedi->ep_tbl[iscsi_cid] = NULL;
936 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
937 if (tmp)
938 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
939 tmp);
940 ep_free_sq:
941 qedi_free_sq(qedi, qedi_ep);
942 ep_conn_exit:
943 iscsi_destroy_endpoint(ep);
944 return ERR_PTR(ret);
945 }
946
947 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
948 {
949 struct qedi_endpoint *qedi_ep;
950 int ret = 0;
951
952 if (qedi_do_not_recover)
953 return 1;
954
955 qedi_ep = ep->dd_data;
956 if (qedi_ep->state == EP_STATE_IDLE ||
957 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
958 return -1;
959
960 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
961 ret = 1;
962
963 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
964 QEDI_OFLD_WAIT_STATE(qedi_ep),
965 msecs_to_jiffies(timeout_ms));
966
967 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
968 ret = -1;
969
970 if (ret > 0)
971 return 1;
972 else if (!ret)
973 return 0;
974 else
975 return ret;
976 }
977
978 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
979 {
980 struct qedi_cmd *cmd, *cmd_tmp;
981
982 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
983 io_cmd) {
984 list_del_init(&cmd->io_cmd);
985 qedi_conn->active_cmd_count--;
986 }
987 }
988
989 static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
990 {
991 struct qedi_endpoint *qedi_ep;
992 struct qedi_conn *qedi_conn = NULL;
993 struct iscsi_conn *conn = NULL;
994 struct qedi_ctx *qedi;
995 int ret = 0;
996 int wait_delay = 20 * HZ;
997 int abrt_conn = 0;
998 int count = 10;
999
1000 qedi_ep = ep->dd_data;
1001 qedi = qedi_ep->qedi;
1002
1003 flush_work(&qedi_ep->offload_work);
1004
1005 if (qedi_ep->conn) {
1006 qedi_conn = qedi_ep->conn;
1007 conn = qedi_conn->cls_conn->dd_data;
1008 iscsi_suspend_queue(conn);
1009 abrt_conn = qedi_conn->abrt_conn;
1010
1011 while (count--) {
1012 if (!test_bit(QEDI_CONN_FW_CLEANUP,
1013 &qedi_conn->flags)) {
1014 break;
1015 }
1016 msleep(1000);
1017 }
1018
1019 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
1020 if (qedi_do_not_recover) {
1021 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1022 "Do not recover cid=0x%x\n",
1023 qedi_ep->iscsi_cid);
1024 goto ep_exit_recover;
1025 }
1026 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1027 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
1028 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
1029 qedi_cleanup_active_cmd_list(qedi_conn);
1030 goto ep_release_conn;
1031 }
1032 }
1033
1034 if (qedi_do_not_recover)
1035 goto ep_exit_recover;
1036
1037 switch (qedi_ep->state) {
1038 case EP_STATE_OFLDCONN_START:
1039 goto ep_release_conn;
1040 case EP_STATE_OFLDCONN_FAILED:
1041 break;
1042 case EP_STATE_OFLDCONN_COMPL:
1043 if (unlikely(!qedi_conn))
1044 break;
1045
1046 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1047 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1048 qedi_conn->active_cmd_count, abrt_conn,
1049 qedi_ep->state,
1050 qedi_ep->iscsi_cid,
1051 qedi_ep->conn
1052 );
1053
1054 if (!qedi_conn->active_cmd_count)
1055 abrt_conn = 0;
1056 else
1057 abrt_conn = 1;
1058
1059 if (abrt_conn)
1060 qedi_clearsq(qedi, qedi_conn, NULL);
1061 break;
1062 default:
1063 break;
1064 }
1065
1066 qedi_ep->state = EP_STATE_DISCONN_START;
1067 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1068 if (ret) {
1069 QEDI_WARN(&qedi->dbg_ctx,
1070 "destroy_conn failed returned %d\n", ret);
1071 } else {
1072 ret = wait_event_interruptible_timeout(
1073 qedi_ep->tcp_ofld_wait,
1074 (qedi_ep->state !=
1075 EP_STATE_DISCONN_START),
1076 wait_delay);
1077 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1078 QEDI_WARN(&qedi->dbg_ctx,
1079 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1080 ret, wait_delay, qedi_ep->iscsi_cid);
1081 }
1082 }
1083
1084 ep_release_conn:
1085 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1086 if (ret)
1087 QEDI_WARN(&qedi->dbg_ctx,
1088 "release_conn returned %d, cid=0x%x\n",
1089 ret, qedi_ep->iscsi_cid);
1090 ep_exit_recover:
1091 qedi_ep->state = EP_STATE_IDLE;
1092 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1093 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1094 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1095 qedi_free_sq(qedi, qedi_ep);
1096
1097 if (qedi_conn)
1098 qedi_conn->ep = NULL;
1099
1100 qedi_ep->conn = NULL;
1101 qedi_ep->qedi = NULL;
1102 atomic_dec(&qedi->num_offloads);
1103
1104 iscsi_destroy_endpoint(ep);
1105 }
1106
1107 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1108 {
1109 struct qed_dev *cdev = qedi->cdev;
1110 struct qedi_uio_dev *udev;
1111 struct qedi_uio_ctrl *uctrl;
1112 struct sk_buff *skb;
1113 u32 len;
1114 int rc = 0;
1115
1116 udev = qedi->udev;
1117 if (!udev) {
1118 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1119 return -EINVAL;
1120 }
1121
1122 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1123 if (!uctrl) {
1124 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1125 return -EINVAL;
1126 }
1127
1128 len = uctrl->host_tx_pkt_len;
1129 if (!len) {
1130 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1131 return -EINVAL;
1132 }
1133
1134 skb = alloc_skb(len, GFP_ATOMIC);
1135 if (!skb) {
1136 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1137 return -EINVAL;
1138 }
1139
1140 skb_put(skb, len);
1141 memcpy(skb->data, udev->tx_pkt, len);
1142 skb->ip_summed = CHECKSUM_NONE;
1143
1144 if (vlanid)
1145 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1146
1147 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0);
1148 if (rc) {
1149 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1150 rc);
1151 kfree_skb(skb);
1152 }
1153
1154 uctrl->host_tx_pkt_len = 0;
1155 uctrl->hw_tx_cons++;
1156
1157 return rc;
1158 }
1159
1160 static void qedi_offload_work(struct work_struct *work)
1161 {
1162 struct qedi_endpoint *qedi_ep =
1163 container_of(work, struct qedi_endpoint, offload_work);
1164 struct qedi_ctx *qedi;
1165 int wait_delay = 20 * HZ;
1166 int ret;
1167
1168 qedi = qedi_ep->qedi;
1169
1170 ret = qedi_iscsi_offload_conn(qedi_ep);
1171 if (ret) {
1172 QEDI_ERR(&qedi->dbg_ctx,
1173 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1174 qedi_ep->iscsi_cid, qedi_ep, ret);
1175 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1176 return;
1177 }
1178
1179 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1180 (qedi_ep->state ==
1181 EP_STATE_OFLDCONN_COMPL),
1182 wait_delay);
1183 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1184 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1185 QEDI_ERR(&qedi->dbg_ctx,
1186 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1187 qedi_ep->iscsi_cid, qedi_ep);
1188 }
1189 }
1190
1191 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1192 {
1193 struct qedi_ctx *qedi;
1194 struct qedi_endpoint *qedi_ep;
1195 int ret = 0;
1196 u32 iscsi_cid;
1197 u16 port_id = 0;
1198
1199 if (!shost) {
1200 ret = -ENXIO;
1201 QEDI_ERR(NULL, "shost is NULL\n");
1202 return ret;
1203 }
1204
1205 if (strcmp(shost->hostt->proc_name, "qedi")) {
1206 ret = -ENXIO;
1207 QEDI_ERR(NULL, "shost %s is invalid\n",
1208 shost->hostt->proc_name);
1209 return ret;
1210 }
1211
1212 qedi = iscsi_host_priv(shost);
1213 if (path_data->handle == QEDI_PATH_HANDLE) {
1214 ret = qedi_data_avail(qedi, path_data->vlan_id);
1215 goto set_path_exit;
1216 }
1217
1218 iscsi_cid = (u32)path_data->handle;
1219 qedi_ep = qedi->ep_tbl[iscsi_cid];
1220 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1221 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
1222 if (!qedi_ep) {
1223 ret = -EINVAL;
1224 goto set_path_exit;
1225 }
1226
1227 if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
1228 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
1229 ret = -EIO;
1230 goto set_path_exit;
1231 }
1232
1233 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
1234 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
1235
1236 qedi_ep->vlan_id = path_data->vlan_id;
1237 if (path_data->pmtu < DEF_PATH_MTU) {
1238 qedi_ep->pmtu = qedi->ll2_mtu;
1239 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1240 "MTU cannot be %u, using default MTU %u\n",
1241 path_data->pmtu, qedi_ep->pmtu);
1242 }
1243
1244 if (path_data->pmtu != qedi->ll2_mtu) {
1245 if (path_data->pmtu > JUMBO_MTU) {
1246 ret = -EINVAL;
1247 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
1248 goto set_path_exit;
1249 }
1250
1251 qedi_reset_host_mtu(qedi, path_data->pmtu);
1252 qedi_ep->pmtu = qedi->ll2_mtu;
1253 }
1254
1255 port_id = qedi_ep->src_port;
1256 if (port_id >= QEDI_LOCAL_PORT_MIN &&
1257 port_id < QEDI_LOCAL_PORT_MAX) {
1258 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
1259 port_id = 0;
1260 } else {
1261 port_id = 0;
1262 }
1263
1264 if (!port_id) {
1265 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
1266 if (port_id == QEDI_LOCAL_PORT_INVALID) {
1267 QEDI_ERR(&qedi->dbg_ctx,
1268 "Failed to allocate port id for iscsi_cid=0x%x\n",
1269 iscsi_cid);
1270 ret = -ENOMEM;
1271 goto set_path_exit;
1272 }
1273 }
1274
1275 qedi_ep->src_port = port_id;
1276
1277 if (qedi_ep->ip_type == TCP_IPV4) {
1278 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
1279 sizeof(struct in_addr));
1280 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
1281 sizeof(struct in_addr));
1282 qedi->ip_type = TCP_IPV4;
1283
1284 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1285 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
1286 qedi_ep->src_addr, qedi_ep->src_port,
1287 qedi_ep->dst_addr, qedi_ep->dst_port);
1288 } else {
1289 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
1290 sizeof(struct in6_addr));
1291 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
1292 sizeof(struct in6_addr));
1293 qedi->ip_type = TCP_IPV6;
1294
1295 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1296 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
1297 qedi_ep->src_addr, qedi_ep->src_port,
1298 qedi_ep->dst_addr, qedi_ep->dst_port);
1299 }
1300
1301 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
1302 queue_work(qedi->offload_thread, &qedi_ep->offload_work);
1303
1304 ret = 0;
1305
1306 set_path_exit:
1307 return ret;
1308 }
1309
1310 static umode_t qedi_attr_is_visible(int param_type, int param)
1311 {
1312 switch (param_type) {
1313 case ISCSI_HOST_PARAM:
1314 switch (param) {
1315 case ISCSI_HOST_PARAM_NETDEV_NAME:
1316 case ISCSI_HOST_PARAM_HWADDRESS:
1317 case ISCSI_HOST_PARAM_IPADDRESS:
1318 return 0444;
1319 default:
1320 return 0;
1321 }
1322 case ISCSI_PARAM:
1323 switch (param) {
1324 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1325 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1326 case ISCSI_PARAM_HDRDGST_EN:
1327 case ISCSI_PARAM_DATADGST_EN:
1328 case ISCSI_PARAM_CONN_ADDRESS:
1329 case ISCSI_PARAM_CONN_PORT:
1330 case ISCSI_PARAM_EXP_STATSN:
1331 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1332 case ISCSI_PARAM_PERSISTENT_PORT:
1333 case ISCSI_PARAM_PING_TMO:
1334 case ISCSI_PARAM_RECV_TMO:
1335 case ISCSI_PARAM_INITIAL_R2T_EN:
1336 case ISCSI_PARAM_MAX_R2T:
1337 case ISCSI_PARAM_IMM_DATA_EN:
1338 case ISCSI_PARAM_FIRST_BURST:
1339 case ISCSI_PARAM_MAX_BURST:
1340 case ISCSI_PARAM_PDU_INORDER_EN:
1341 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1342 case ISCSI_PARAM_ERL:
1343 case ISCSI_PARAM_TARGET_NAME:
1344 case ISCSI_PARAM_TPGT:
1345 case ISCSI_PARAM_USERNAME:
1346 case ISCSI_PARAM_PASSWORD:
1347 case ISCSI_PARAM_USERNAME_IN:
1348 case ISCSI_PARAM_PASSWORD_IN:
1349 case ISCSI_PARAM_FAST_ABORT:
1350 case ISCSI_PARAM_ABORT_TMO:
1351 case ISCSI_PARAM_LU_RESET_TMO:
1352 case ISCSI_PARAM_TGT_RESET_TMO:
1353 case ISCSI_PARAM_IFACE_NAME:
1354 case ISCSI_PARAM_INITIATOR_NAME:
1355 case ISCSI_PARAM_BOOT_ROOT:
1356 case ISCSI_PARAM_BOOT_NIC:
1357 case ISCSI_PARAM_BOOT_TARGET:
1358 return 0444;
1359 default:
1360 return 0;
1361 }
1362 }
1363
1364 return 0;
1365 }
1366
1367 static void qedi_cleanup_task(struct iscsi_task *task)
1368 {
1369 if (!task->sc || task->state == ISCSI_TASK_PENDING) {
1370 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
1371 refcount_read(&task->refcount));
1372 return;
1373 }
1374
1375 qedi_iscsi_unmap_sg_list(task->dd_data);
1376 }
1377
1378 struct iscsi_transport qedi_iscsi_transport = {
1379 .owner = THIS_MODULE,
1380 .name = QEDI_MODULE_NAME,
1381 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
1382 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
1383 .create_session = qedi_session_create,
1384 .destroy_session = qedi_session_destroy,
1385 .create_conn = qedi_conn_create,
1386 .bind_conn = qedi_conn_bind,
1387 .start_conn = qedi_conn_start,
1388 .stop_conn = iscsi_conn_stop,
1389 .destroy_conn = qedi_conn_destroy,
1390 .set_param = iscsi_set_param,
1391 .get_ep_param = qedi_ep_get_param,
1392 .get_conn_param = iscsi_conn_get_param,
1393 .get_session_param = iscsi_session_get_param,
1394 .get_host_param = qedi_host_get_param,
1395 .send_pdu = iscsi_conn_send_pdu,
1396 .get_stats = qedi_conn_get_stats,
1397 .xmit_task = qedi_task_xmit,
1398 .cleanup_task = qedi_cleanup_task,
1399 .session_recovery_timedout = iscsi_session_recovery_timedout,
1400 .ep_connect = qedi_ep_connect,
1401 .ep_poll = qedi_ep_poll,
1402 .ep_disconnect = qedi_ep_disconnect,
1403 .set_path = qedi_set_path,
1404 .attr_is_visible = qedi_attr_is_visible,
1405 };
1406
1407 void qedi_start_conn_recovery(struct qedi_ctx *qedi,
1408 struct qedi_conn *qedi_conn)
1409 {
1410 struct iscsi_cls_session *cls_sess;
1411 struct iscsi_cls_conn *cls_conn;
1412 struct iscsi_conn *conn;
1413
1414 cls_conn = qedi_conn->cls_conn;
1415 conn = cls_conn->dd_data;
1416 cls_sess = iscsi_conn_to_session(cls_conn);
1417
1418 if (iscsi_is_session_online(cls_sess)) {
1419 qedi_conn->abrt_conn = 1;
1420 QEDI_ERR(&qedi->dbg_ctx,
1421 "Failing connection, state=0x%x, cid=0x%x\n",
1422 conn->session->state, qedi_conn->iscsi_conn_id);
1423 iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
1424 ISCSI_ERR_CONN_FAILED);
1425 }
1426 }
1427
1428 static const struct {
1429 enum iscsi_error_types error_code;
1430 char *err_string;
1431 } qedi_iscsi_error[] = {
1432 { ISCSI_STATUS_NONE,
1433 "tcp_error none"
1434 },
1435 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
1436 "task cid mismatch"
1437 },
1438 { ISCSI_CONN_ERROR_TASK_NOT_VALID,
1439 "invalid task"
1440 },
1441 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
1442 "rq ring full"
1443 },
1444 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
1445 "cmdq ring full"
1446 },
1447 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
1448 "sge caching failed"
1449 },
1450 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
1451 "hdr digest error"
1452 },
1453 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
1454 "local cmpl error"
1455 },
1456 { ISCSI_CONN_ERROR_DATA_OVERRUN,
1457 "invalid task"
1458 },
1459 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
1460 "out of sge error"
1461 },
1462 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
1463 "tcp ip fragment error"
1464 },
1465 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
1466 "AHS len protocol error"
1467 },
1468 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
1469 "itt out of range error"
1470 },
1471 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
1472 "data seg more than pdu size"
1473 },
1474 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
1475 "invalid opcode"
1476 },
1477 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
1478 "invalid opcode before update"
1479 },
1480 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
1481 "unexpected opcode"
1482 },
1483 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
1484 "r2t carries no data"
1485 },
1486 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
1487 "data sn error"
1488 },
1489 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
1490 "data TTT error"
1491 },
1492 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
1493 "r2t TTT error"
1494 },
1495 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
1496 "buffer offset error"
1497 },
1498 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
1499 "buffer offset ooo"
1500 },
1501 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
1502 "data seg len 0"
1503 },
1504 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
1505 "data xer len error"
1506 },
1507 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
1508 "data xer len1 error"
1509 },
1510 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
1511 "data xer len2 error"
1512 },
1513 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
1514 "protocol lun error"
1515 },
1516 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
1517 "f bit zero error"
1518 },
1519 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
1520 "exp stat sn error"
1521 },
1522 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
1523 "dsl not zero error"
1524 },
1525 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
1526 "invalid dsl"
1527 },
1528 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
1529 "data seg len too big"
1530 },
1531 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
1532 "outstanding r2t count error"
1533 },
1534 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
1535 "sense datalen error"
1536 },
1537 };
1538
1539 char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
1540 {
1541 int i;
1542 char *msg = NULL;
1543
1544 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
1545 if (qedi_iscsi_error[i].error_code == err_code) {
1546 msg = qedi_iscsi_error[i].err_string;
1547 break;
1548 }
1549 }
1550 return msg;
1551 }
1552
1553 void qedi_process_iscsi_error(struct qedi_endpoint *ep,
1554 struct iscsi_eqe_data *data)
1555 {
1556 struct qedi_conn *qedi_conn;
1557 struct qedi_ctx *qedi;
1558 char warn_notice[] = "iscsi_warning";
1559 char error_notice[] = "iscsi_error";
1560 char unknown_msg[] = "Unknown error";
1561 char *message;
1562 int need_recovery = 0;
1563 u32 err_mask = 0;
1564 char *msg;
1565
1566 if (!ep)
1567 return;
1568
1569 qedi_conn = ep->conn;
1570 if (!qedi_conn)
1571 return;
1572
1573 qedi = ep->qedi;
1574
1575 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
1576 data->error_code);
1577
1578 if (err_mask) {
1579 need_recovery = 0;
1580 message = warn_notice;
1581 } else {
1582 need_recovery = 1;
1583 message = error_notice;
1584 }
1585
1586 msg = qedi_get_iscsi_error(data->error_code);
1587 if (!msg) {
1588 need_recovery = 0;
1589 msg = unknown_msg;
1590 }
1591
1592 iscsi_conn_printk(KERN_ALERT,
1593 qedi_conn->cls_conn->dd_data,
1594 "qedi: %s - %s\n", message, msg);
1595
1596 if (need_recovery)
1597 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1598 }
1599
1600 void qedi_process_tcp_error(struct qedi_endpoint *ep,
1601 struct iscsi_eqe_data *data)
1602 {
1603 struct qedi_conn *qedi_conn;
1604
1605 if (!ep)
1606 return;
1607
1608 qedi_conn = ep->conn;
1609 if (!qedi_conn)
1610 return;
1611
1612 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
1613 data->error_code);
1614
1615 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1616 }
Linux with added FPC-III support