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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / scsi / qedi / qedi_iscsi.c
blob08c05403cd720f3bf75fad0c1856488ef842ff32
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * QLogic iSCSI Offload Driver
4 * Copyright (c) 2016 Cavium Inc.
5 */
6
7 #include <linux/blkdev.h>
8 #include <linux/etherdevice.h>
9 #include <linux/if_ether.h>
10 #include <linux/if_vlan.h>
11 #include <scsi/scsi_tcq.h>
12
13 #include "qedi.h"
14 #include "qedi_iscsi.h"
15 #include "qedi_gbl.h"
16
17 int qedi_recover_all_conns(struct qedi_ctx *qedi)
18 {
19 struct qedi_conn *qedi_conn;
20 int i;
21
22 for (i = 0; i < qedi->max_active_conns; i++) {
23 qedi_conn = qedi_get_conn_from_id(qedi, i);
24 if (!qedi_conn)
25 continue;
26
27 qedi_start_conn_recovery(qedi, qedi_conn);
28 }
29
30 return SUCCESS;
31 }
32
33 static int qedi_eh_host_reset(struct scsi_cmnd *cmd)
34 {
35 struct Scsi_Host *shost = cmd->device->host;
36 struct qedi_ctx *qedi;
37
38 qedi = iscsi_host_priv(shost);
39
40 return qedi_recover_all_conns(qedi);
41 }
42
43 struct scsi_host_template qedi_host_template = {
44 .module = THIS_MODULE,
45 .name = "QLogic QEDI 25/40/100Gb iSCSI Initiator Driver",
46 .proc_name = QEDI_MODULE_NAME,
47 .queuecommand = iscsi_queuecommand,
48 .eh_timed_out = iscsi_eh_cmd_timed_out,
49 .eh_abort_handler = iscsi_eh_abort,
50 .eh_device_reset_handler = iscsi_eh_device_reset,
51 .eh_target_reset_handler = iscsi_eh_recover_target,
52 .eh_host_reset_handler = qedi_eh_host_reset,
53 .target_alloc = iscsi_target_alloc,
54 .change_queue_depth = scsi_change_queue_depth,
55 .can_queue = QEDI_MAX_ISCSI_TASK,
56 .this_id = -1,
57 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD,
58 .max_sectors = 0xffff,
59 .dma_boundary = QEDI_HW_DMA_BOUNDARY,
60 .cmd_per_lun = 128,
61 .shost_attrs = qedi_shost_attrs,
62 };
63
64 static void qedi_conn_free_login_resources(struct qedi_ctx *qedi,
65 struct qedi_conn *qedi_conn)
66 {
67 if (qedi_conn->gen_pdu.resp_bd_tbl) {
68 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
69 qedi_conn->gen_pdu.resp_bd_tbl,
70 qedi_conn->gen_pdu.resp_bd_dma);
71 qedi_conn->gen_pdu.resp_bd_tbl = NULL;
72 }
73
74 if (qedi_conn->gen_pdu.req_bd_tbl) {
75 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
76 qedi_conn->gen_pdu.req_bd_tbl,
77 qedi_conn->gen_pdu.req_bd_dma);
78 qedi_conn->gen_pdu.req_bd_tbl = NULL;
79 }
80
81 if (qedi_conn->gen_pdu.resp_buf) {
82 dma_free_coherent(&qedi->pdev->dev,
83 ISCSI_DEF_MAX_RECV_SEG_LEN,
84 qedi_conn->gen_pdu.resp_buf,
85 qedi_conn->gen_pdu.resp_dma_addr);
86 qedi_conn->gen_pdu.resp_buf = NULL;
87 }
88
89 if (qedi_conn->gen_pdu.req_buf) {
90 dma_free_coherent(&qedi->pdev->dev,
91 ISCSI_DEF_MAX_RECV_SEG_LEN,
92 qedi_conn->gen_pdu.req_buf,
93 qedi_conn->gen_pdu.req_dma_addr);
94 qedi_conn->gen_pdu.req_buf = NULL;
95 }
96 }
97
98 static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi,
99 struct qedi_conn *qedi_conn)
100 {
101 qedi_conn->gen_pdu.req_buf =
102 dma_alloc_coherent(&qedi->pdev->dev,
103 ISCSI_DEF_MAX_RECV_SEG_LEN,
104 &qedi_conn->gen_pdu.req_dma_addr,
105 GFP_KERNEL);
106 if (!qedi_conn->gen_pdu.req_buf)
107 goto login_req_buf_failure;
108
109 qedi_conn->gen_pdu.req_buf_size = 0;
110 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf;
111
112 qedi_conn->gen_pdu.resp_buf =
113 dma_alloc_coherent(&qedi->pdev->dev,
114 ISCSI_DEF_MAX_RECV_SEG_LEN,
115 &qedi_conn->gen_pdu.resp_dma_addr,
116 GFP_KERNEL);
117 if (!qedi_conn->gen_pdu.resp_buf)
118 goto login_resp_buf_failure;
119
120 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
121 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf;
122
123 qedi_conn->gen_pdu.req_bd_tbl =
124 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
125 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
126 if (!qedi_conn->gen_pdu.req_bd_tbl)
127 goto login_req_bd_tbl_failure;
128
129 qedi_conn->gen_pdu.resp_bd_tbl =
130 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
131 &qedi_conn->gen_pdu.resp_bd_dma,
132 GFP_KERNEL);
133 if (!qedi_conn->gen_pdu.resp_bd_tbl)
134 goto login_resp_bd_tbl_failure;
135
136 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS,
137 "Allocation successful, cid=0x%x\n",
138 qedi_conn->iscsi_conn_id);
139 return 0;
140
141 login_resp_bd_tbl_failure:
142 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
143 qedi_conn->gen_pdu.req_bd_tbl,
144 qedi_conn->gen_pdu.req_bd_dma);
145 qedi_conn->gen_pdu.req_bd_tbl = NULL;
146
147 login_req_bd_tbl_failure:
148 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
149 qedi_conn->gen_pdu.resp_buf,
150 qedi_conn->gen_pdu.resp_dma_addr);
151 qedi_conn->gen_pdu.resp_buf = NULL;
152 login_resp_buf_failure:
153 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
154 qedi_conn->gen_pdu.req_buf,
155 qedi_conn->gen_pdu.req_dma_addr);
156 qedi_conn->gen_pdu.req_buf = NULL;
157 login_req_buf_failure:
158 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data,
159 "login resource alloc failed!!\n");
160 return -ENOMEM;
161 }
162
163 static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi,
164 struct iscsi_session *session)
165 {
166 int i;
167
168 for (i = 0; i < session->cmds_max; i++) {
169 struct iscsi_task *task = session->cmds[i];
170 struct qedi_cmd *cmd = task->dd_data;
171
172 if (cmd->io_tbl.sge_tbl)
173 dma_free_coherent(&qedi->pdev->dev,
174 QEDI_ISCSI_MAX_BDS_PER_CMD *
175 sizeof(struct scsi_sge),
176 cmd->io_tbl.sge_tbl,
177 cmd->io_tbl.sge_tbl_dma);
178
179 if (cmd->sense_buffer)
180 dma_free_coherent(&qedi->pdev->dev,
181 SCSI_SENSE_BUFFERSIZE,
182 cmd->sense_buffer,
183 cmd->sense_buffer_dma);
184 }
185 }
186
187 static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session,
188 struct qedi_cmd *cmd)
189 {
190 struct qedi_io_bdt *io = &cmd->io_tbl;
191 struct scsi_sge *sge;
192
193 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev,
194 QEDI_ISCSI_MAX_BDS_PER_CMD *
195 sizeof(*sge),
196 &io->sge_tbl_dma, GFP_KERNEL);
197 if (!io->sge_tbl) {
198 iscsi_session_printk(KERN_ERR, session,
199 "Could not allocate BD table.\n");
200 return -ENOMEM;
201 }
202
203 io->sge_valid = 0;
204 return 0;
205 }
206
207 static int qedi_setup_cmd_pool(struct qedi_ctx *qedi,
208 struct iscsi_session *session)
209 {
210 int i;
211
212 for (i = 0; i < session->cmds_max; i++) {
213 struct iscsi_task *task = session->cmds[i];
214 struct qedi_cmd *cmd = task->dd_data;
215
216 task->hdr = &cmd->hdr;
217 task->hdr_max = sizeof(struct iscsi_hdr);
218
219 if (qedi_alloc_sget(qedi, session, cmd))
220 goto free_sgets;
221
222 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev,
223 SCSI_SENSE_BUFFERSIZE,
224 &cmd->sense_buffer_dma,
225 GFP_KERNEL);
226 if (!cmd->sense_buffer)
227 goto free_sgets;
228 }
229
230 return 0;
231
232 free_sgets:
233 qedi_destroy_cmd_pool(qedi, session);
234 return -ENOMEM;
235 }
236
237 static struct iscsi_cls_session *
238 qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max,
239 u16 qdepth, uint32_t initial_cmdsn)
240 {
241 struct Scsi_Host *shost;
242 struct iscsi_cls_session *cls_session;
243 struct qedi_ctx *qedi;
244 struct qedi_endpoint *qedi_ep;
245
246 if (!ep)
247 return NULL;
248
249 qedi_ep = ep->dd_data;
250 shost = qedi_ep->qedi->shost;
251 qedi = iscsi_host_priv(shost);
252
253 if (cmds_max > qedi->max_sqes)
254 cmds_max = qedi->max_sqes;
255 else if (cmds_max < QEDI_SQ_WQES_MIN)
256 cmds_max = QEDI_SQ_WQES_MIN;
257
258 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost,
259 cmds_max, 0, sizeof(struct qedi_cmd),
260 initial_cmdsn, ISCSI_MAX_TARGET);
261 if (!cls_session) {
262 QEDI_ERR(&qedi->dbg_ctx,
263 "Failed to setup session for ep=%p\n", qedi_ep);
264 return NULL;
265 }
266
267 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) {
268 QEDI_ERR(&qedi->dbg_ctx,
269 "Failed to setup cmd pool for ep=%p\n", qedi_ep);
270 goto session_teardown;
271 }
272
273 return cls_session;
274
275 session_teardown:
276 iscsi_session_teardown(cls_session);
277 return NULL;
278 }
279
280 static void qedi_session_destroy(struct iscsi_cls_session *cls_session)
281 {
282 struct iscsi_session *session = cls_session->dd_data;
283 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
284 struct qedi_ctx *qedi = iscsi_host_priv(shost);
285
286 qedi_destroy_cmd_pool(qedi, session);
287 iscsi_session_teardown(cls_session);
288 }
289
290 static struct iscsi_cls_conn *
291 qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
292 {
293 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
294 struct qedi_ctx *qedi = iscsi_host_priv(shost);
295 struct iscsi_cls_conn *cls_conn;
296 struct qedi_conn *qedi_conn;
297 struct iscsi_conn *conn;
298
299 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn),
300 cid);
301 if (!cls_conn) {
302 QEDI_ERR(&qedi->dbg_ctx,
303 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n",
304 cid, cls_session);
305 return NULL;
306 }
307
308 conn = cls_conn->dd_data;
309 qedi_conn = conn->dd_data;
310 qedi_conn->cls_conn = cls_conn;
311 qedi_conn->qedi = qedi;
312 qedi_conn->ep = NULL;
313 qedi_conn->active_cmd_count = 0;
314 INIT_LIST_HEAD(&qedi_conn->active_cmd_list);
315 spin_lock_init(&qedi_conn->list_lock);
316
317 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) {
318 iscsi_conn_printk(KERN_ALERT, conn,
319 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n",
320 cid, cls_session);
321 goto free_conn;
322 }
323
324 return cls_conn;
325
326 free_conn:
327 iscsi_conn_teardown(cls_conn);
328 return NULL;
329 }
330
331 void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
332 {
333 iscsi_block_session(cls_session);
334 }
335
336 void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
337 {
338 iscsi_unblock_session(cls_session);
339 }
340
341 static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi,
342 struct qedi_conn *qedi_conn)
343 {
344 u32 iscsi_cid = qedi_conn->iscsi_conn_id;
345
346 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) {
347 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
348 "conn bind - entry #%d not free\n",
349 iscsi_cid);
350 return -EBUSY;
351 }
352
353 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn;
354 return 0;
355 }
356
357 struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid)
358 {
359 if (!qedi->cid_que.conn_cid_tbl) {
360 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n");
361 return NULL;
362
363 } else if (iscsi_cid >= qedi->max_active_conns) {
364 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid);
365 return NULL;
366 }
367 return qedi->cid_que.conn_cid_tbl[iscsi_cid];
368 }
369
370 static int qedi_conn_bind(struct iscsi_cls_session *cls_session,
371 struct iscsi_cls_conn *cls_conn,
372 u64 transport_fd, int is_leading)
373 {
374 struct iscsi_conn *conn = cls_conn->dd_data;
375 struct qedi_conn *qedi_conn = conn->dd_data;
376 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
377 struct qedi_ctx *qedi = iscsi_host_priv(shost);
378 struct qedi_endpoint *qedi_ep;
379 struct iscsi_endpoint *ep;
380
381 ep = iscsi_lookup_endpoint(transport_fd);
382 if (!ep)
383 return -EINVAL;
384
385 qedi_ep = ep->dd_data;
386 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) ||
387 (qedi_ep->state == EP_STATE_TCP_RST_RCVD))
388 return -EINVAL;
389
390 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
391 return -EINVAL;
392
393 qedi_ep->conn = qedi_conn;
394 qedi_conn->ep = qedi_ep;
395 qedi_conn->iscsi_ep = ep;
396 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
397 qedi_conn->fw_cid = qedi_ep->fw_cid;
398 qedi_conn->cmd_cleanup_req = 0;
399 qedi_conn->cmd_cleanup_cmpl = 0;
400
401 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn))
402 return -EINVAL;
403
404 spin_lock_init(&qedi_conn->tmf_work_lock);
405 INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
406 init_waitqueue_head(&qedi_conn->wait_queue);
407 return 0;
408 }
409
410 static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
411 struct qedi_conn *qedi_conn)
412 {
413 struct qed_iscsi_params_update *conn_info;
414 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
415 struct iscsi_conn *conn = cls_conn->dd_data;
416 struct qedi_endpoint *qedi_ep;
417 int rval;
418
419 qedi_ep = qedi_conn->ep;
420
421 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
422 if (!conn_info) {
423 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
424 return -ENOMEM;
425 }
426
427 conn_info->update_flag = 0;
428
429 if (conn->hdrdgst_en)
430 SET_FIELD(conn_info->update_flag,
431 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
432 if (conn->datadgst_en)
433 SET_FIELD(conn_info->update_flag,
434 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
435 if (conn->session->initial_r2t_en)
436 SET_FIELD(conn_info->update_flag,
437 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
438 true);
439 if (conn->session->imm_data_en)
440 SET_FIELD(conn_info->update_flag,
441 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
442 true);
443
444 conn_info->max_seq_size = conn->session->max_burst;
445 conn_info->max_recv_pdu_length = conn->max_recv_dlength;
446 conn_info->max_send_pdu_length = conn->max_xmit_dlength;
447 conn_info->first_seq_length = conn->session->first_burst;
448 conn_info->exp_stat_sn = conn->exp_statsn;
449
450 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
451 conn_info);
452 if (rval) {
453 rval = -ENXIO;
454 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
455 }
456
457 kfree(conn_info);
458 return rval;
459 }
460
461 static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
462 {
463 u16 mss = 0;
464 u16 hdrs = TCP_HDR_LEN;
465
466 if (is_ipv6)
467 hdrs += IPV6_HDR_LEN;
468 else
469 hdrs += IPV4_HDR_LEN;
470
471 mss = pmtu - hdrs;
472
473 if (!mss)
474 mss = DEF_MSS;
475
476 return mss;
477 }
478
479 static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
480 {
481 struct qedi_ctx *qedi = qedi_ep->qedi;
482 struct qed_iscsi_params_offload *conn_info;
483 int rval;
484 int i;
485
486 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
487 if (!conn_info) {
488 QEDI_ERR(&qedi->dbg_ctx,
489 "Failed to allocate memory ep=%p\n", qedi_ep);
490 return -ENOMEM;
491 }
492
493 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
494 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
495
496 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
497 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
498
499 if (qedi_ep->ip_type == TCP_IPV4) {
500 conn_info->ip_version = 0;
501 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
502 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
503 qedi_ep->src_addr, qedi_ep->dst_addr);
504 } else {
505 for (i = 1; i < 4; i++) {
506 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
507 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
508 }
509
510 conn_info->ip_version = 1;
511 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
512 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
513 qedi_ep->src_addr, qedi_ep->dst_addr);
514 }
515
516 conn_info->src.port = qedi_ep->src_port;
517 conn_info->dst.port = qedi_ep->dst_port;
518
519 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
520 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
521 conn_info->vlan_id = qedi_ep->vlan_id;
522
523 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
524 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
525 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
526 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
527
528 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues);
529
530 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
531 conn_info->dup_ack_theshold = 3;
532 conn_info->rcv_wnd = 65535;
533
534 conn_info->ss_thresh = 65535;
535 conn_info->srtt = 300;
536 conn_info->rtt_var = 150;
537 conn_info->flow_label = 0;
538 conn_info->ka_timeout = DEF_KA_TIMEOUT;
539 conn_info->ka_interval = DEF_KA_INTERVAL;
540 conn_info->max_rt_time = DEF_MAX_RT_TIME;
541 conn_info->ttl = DEF_TTL;
542 conn_info->tos_or_tc = DEF_TOS;
543 conn_info->remote_port = qedi_ep->dst_port;
544 conn_info->local_port = qedi_ep->src_port;
545
546 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
547 (qedi_ep->ip_type == TCP_IPV6),
548 1, (qedi_ep->vlan_id != 0));
549
550 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss;
551 conn_info->rcv_wnd_scale = 4;
552 conn_info->da_timeout_value = 200;
553 conn_info->ack_frequency = 2;
554
555 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
556 "Default cq index [%d], mss [%d]\n",
557 conn_info->default_cq, conn_info->mss);
558
559 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
560 if (rval)
561 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
562 rval, qedi_ep);
563
564 kfree(conn_info);
565 return rval;
566 }
567
568 static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
569 {
570 struct iscsi_conn *conn = cls_conn->dd_data;
571 struct qedi_conn *qedi_conn = conn->dd_data;
572 struct qedi_ctx *qedi;
573 int rval;
574
575 qedi = qedi_conn->qedi;
576
577 rval = qedi_iscsi_update_conn(qedi, qedi_conn);
578 if (rval) {
579 iscsi_conn_printk(KERN_ALERT, conn,
580 "conn_start: FW offload conn failed.\n");
581 rval = -EINVAL;
582 goto start_err;
583 }
584
585 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
586 qedi_conn->abrt_conn = 0;
587
588 rval = iscsi_conn_start(cls_conn);
589 if (rval) {
590 iscsi_conn_printk(KERN_ALERT, conn,
591 "iscsi_conn_start: FW offload conn failed!!\n");
592 }
593
594 start_err:
595 return rval;
596 }
597
598 static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
599 {
600 struct iscsi_conn *conn = cls_conn->dd_data;
601 struct qedi_conn *qedi_conn = conn->dd_data;
602 struct Scsi_Host *shost;
603 struct qedi_ctx *qedi;
604
605 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
606 qedi = iscsi_host_priv(shost);
607
608 qedi_conn_free_login_resources(qedi, qedi_conn);
609 iscsi_conn_teardown(cls_conn);
610 }
611
612 static int qedi_ep_get_param(struct iscsi_endpoint *ep,
613 enum iscsi_param param, char *buf)
614 {
615 struct qedi_endpoint *qedi_ep = ep->dd_data;
616 int len;
617
618 if (!qedi_ep)
619 return -ENOTCONN;
620
621 switch (param) {
622 case ISCSI_PARAM_CONN_PORT:
623 len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
624 break;
625 case ISCSI_PARAM_CONN_ADDRESS:
626 if (qedi_ep->ip_type == TCP_IPV4)
627 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
628 else
629 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
630 break;
631 default:
632 return -ENOTCONN;
633 }
634
635 return len;
636 }
637
638 static int qedi_host_get_param(struct Scsi_Host *shost,
639 enum iscsi_host_param param, char *buf)
640 {
641 struct qedi_ctx *qedi;
642 int len;
643
644 qedi = iscsi_host_priv(shost);
645
646 switch (param) {
647 case ISCSI_HOST_PARAM_HWADDRESS:
648 len = sysfs_format_mac(buf, qedi->mac, 6);
649 break;
650 case ISCSI_HOST_PARAM_NETDEV_NAME:
651 len = sprintf(buf, "host%d\n", shost->host_no);
652 break;
653 case ISCSI_HOST_PARAM_IPADDRESS:
654 if (qedi->ip_type == TCP_IPV4)
655 len = sprintf(buf, "%pI4\n", qedi->src_ip);
656 else
657 len = sprintf(buf, "%pI6\n", qedi->src_ip);
658 break;
659 default:
660 return iscsi_host_get_param(shost, param, buf);
661 }
662
663 return len;
664 }
665
666 static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
667 struct iscsi_stats *stats)
668 {
669 struct iscsi_conn *conn = cls_conn->dd_data;
670 struct qed_iscsi_stats iscsi_stats;
671 struct Scsi_Host *shost;
672 struct qedi_ctx *qedi;
673
674 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
675 qedi = iscsi_host_priv(shost);
676 qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
677
678 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
679 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
680 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
681 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
682 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
683
684 stats->txdata_octets = conn->txdata_octets;
685 stats->rxdata_octets = conn->rxdata_octets;
686 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
687 stats->dataout_pdus = conn->dataout_pdus_cnt;
688 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
689 stats->datain_pdus = conn->datain_pdus_cnt;
690 stats->r2t_pdus = conn->r2t_pdus_cnt;
691 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
692 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
693 stats->digest_err = 0;
694 stats->timeout_err = 0;
695 strcpy(stats->custom[0].desc, "eh_abort_cnt");
696 stats->custom[0].value = conn->eh_abort_cnt;
697 stats->custom_length = 1;
698 }
699
700 static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
701 {
702 struct scsi_sge *bd_tbl;
703
704 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
705
706 bd_tbl->sge_addr.hi =
707 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
708 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
709 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
710 qedi_conn->gen_pdu.req_buf;
711 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
712 bd_tbl->sge_addr.hi =
713 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
714 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
715 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
716 }
717
718 static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
719 {
720 struct qedi_cmd *cmd = task->dd_data;
721 struct qedi_conn *qedi_conn = cmd->conn;
722 char *buf;
723 int data_len;
724 int rc = 0;
725
726 qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
727 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
728 case ISCSI_OP_LOGIN:
729 qedi_send_iscsi_login(qedi_conn, task);
730 break;
731 case ISCSI_OP_NOOP_OUT:
732 data_len = qedi_conn->gen_pdu.req_buf_size;
733 buf = qedi_conn->gen_pdu.req_buf;
734 if (data_len)
735 rc = qedi_send_iscsi_nopout(qedi_conn, task,
736 buf, data_len, 1);
737 else
738 rc = qedi_send_iscsi_nopout(qedi_conn, task,
739 NULL, 0, 1);
740 break;
741 case ISCSI_OP_LOGOUT:
742 rc = qedi_send_iscsi_logout(qedi_conn, task);
743 break;
744 case ISCSI_OP_SCSI_TMFUNC:
745 rc = qedi_iscsi_abort_work(qedi_conn, task);
746 break;
747 case ISCSI_OP_TEXT:
748 rc = qedi_send_iscsi_text(qedi_conn, task);
749 break;
750 default:
751 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
752 "unsupported op 0x%x\n", task->hdr->opcode);
753 }
754
755 return rc;
756 }
757
758 static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
759 {
760 struct qedi_conn *qedi_conn = conn->dd_data;
761 struct qedi_cmd *cmd = task->dd_data;
762
763 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
764
765 qedi_conn->gen_pdu.req_buf_size = task->data_count;
766
767 if (task->data_count) {
768 memcpy(qedi_conn->gen_pdu.req_buf, task->data,
769 task->data_count);
770 qedi_conn->gen_pdu.req_wr_ptr =
771 qedi_conn->gen_pdu.req_buf + task->data_count;
772 }
773
774 cmd->conn = conn->dd_data;
775 cmd->scsi_cmd = NULL;
776 return qedi_iscsi_send_generic_request(task);
777 }
778
779 static int qedi_task_xmit(struct iscsi_task *task)
780 {
781 struct iscsi_conn *conn = task->conn;
782 struct qedi_conn *qedi_conn = conn->dd_data;
783 struct qedi_cmd *cmd = task->dd_data;
784 struct scsi_cmnd *sc = task->sc;
785
786 if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags))
787 return -ENODEV;
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 iscsi_path path_req;
814 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
815 u32 iscsi_cid = QEDI_CID_RESERVED;
816 u16 len = 0;
817 char *buf = NULL;
818 int ret, tmp;
819
820 if (!shost) {
821 ret = -ENXIO;
822 QEDI_ERR(NULL, "shost is NULL\n");
823 return ERR_PTR(ret);
824 }
825
826 if (qedi_do_not_recover) {
827 ret = -ENOMEM;
828 return ERR_PTR(ret);
829 }
830
831 qedi = iscsi_host_priv(shost);
832
833 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
834 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
835 ret = -ENOMEM;
836 return ERR_PTR(ret);
837 }
838
839 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
840 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
841 return ERR_PTR(-ENXIO);
842 }
843
844 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
845 if (!ep) {
846 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
847 ret = -ENOMEM;
848 return ERR_PTR(ret);
849 }
850 qedi_ep = ep->dd_data;
851 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
852 qedi_ep->state = EP_STATE_IDLE;
853 qedi_ep->iscsi_cid = (u32)-1;
854 qedi_ep->qedi = qedi;
855
856 if (dst_addr->sa_family == AF_INET) {
857 addr = (struct sockaddr_in *)dst_addr;
858 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
859 sizeof(struct in_addr));
860 qedi_ep->dst_port = ntohs(addr->sin_port);
861 qedi_ep->ip_type = TCP_IPV4;
862 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
863 "dst_addr=%pI4, dst_port=%u\n",
864 qedi_ep->dst_addr, qedi_ep->dst_port);
865 } else if (dst_addr->sa_family == AF_INET6) {
866 addr6 = (struct sockaddr_in6 *)dst_addr;
867 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
868 sizeof(struct in6_addr));
869 qedi_ep->dst_port = ntohs(addr6->sin6_port);
870 qedi_ep->ip_type = TCP_IPV6;
871 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
872 "dst_addr=%pI6, dst_port=%u\n",
873 qedi_ep->dst_addr, qedi_ep->dst_port);
874 } else {
875 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
876 }
877
878 ret = qedi_alloc_sq(qedi, qedi_ep);
879 if (ret)
880 goto ep_conn_exit;
881
882 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
883 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
884
885 if (ret) {
886 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
887 ret = -ENXIO;
888 goto ep_free_sq;
889 }
890
891 iscsi_cid = qedi_ep->handle;
892 qedi_ep->iscsi_cid = iscsi_cid;
893
894 init_waitqueue_head(&qedi_ep->ofld_wait);
895 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
896 qedi_ep->state = EP_STATE_OFLDCONN_START;
897 qedi->ep_tbl[iscsi_cid] = qedi_ep;
898
899 buf = (char *)&path_req;
900 len = sizeof(path_req);
901 memset(&path_req, 0, len);
902
903 msg_type = ISCSI_KEVENT_PATH_REQ;
904 path_req.handle = (u64)qedi_ep->iscsi_cid;
905 path_req.pmtu = qedi->ll2_mtu;
906 qedi_ep->pmtu = qedi->ll2_mtu;
907 if (qedi_ep->ip_type == TCP_IPV4) {
908 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
909 sizeof(struct in_addr));
910 path_req.ip_addr_len = 4;
911 } else {
912 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
913 sizeof(struct in6_addr));
914 path_req.ip_addr_len = 16;
915 }
916
917 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
918 len);
919 if (ret) {
920 QEDI_ERR(&qedi->dbg_ctx,
921 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
922 iscsi_cid, ret);
923 goto ep_rel_conn;
924 }
925
926 atomic_inc(&qedi->num_offloads);
927 return ep;
928
929 ep_rel_conn:
930 qedi->ep_tbl[iscsi_cid] = NULL;
931 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
932 if (tmp)
933 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
934 tmp);
935 ep_free_sq:
936 qedi_free_sq(qedi, qedi_ep);
937 ep_conn_exit:
938 iscsi_destroy_endpoint(ep);
939 return ERR_PTR(ret);
940 }
941
942 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
943 {
944 struct qedi_endpoint *qedi_ep;
945 int ret = 0;
946
947 if (qedi_do_not_recover)
948 return 1;
949
950 qedi_ep = ep->dd_data;
951 if (qedi_ep->state == EP_STATE_IDLE ||
952 qedi_ep->state == EP_STATE_OFLDCONN_NONE ||
953 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
954 return -1;
955
956 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
957 ret = 1;
958
959 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
960 QEDI_OFLD_WAIT_STATE(qedi_ep),
961 msecs_to_jiffies(timeout_ms));
962
963 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
964 ret = -1;
965
966 if (ret > 0)
967 return 1;
968 else if (!ret)
969 return 0;
970 else
971 return ret;
972 }
973
974 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
975 {
976 struct qedi_cmd *cmd, *cmd_tmp;
977
978 spin_lock(&qedi_conn->list_lock);
979 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
980 io_cmd) {
981 list_del_init(&cmd->io_cmd);
982 qedi_conn->active_cmd_count--;
983 }
984 spin_unlock(&qedi_conn->list_lock);
985 }
986
987 static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
988 {
989 struct qedi_endpoint *qedi_ep;
990 struct qedi_conn *qedi_conn = NULL;
991 struct iscsi_conn *conn = NULL;
992 struct qedi_ctx *qedi;
993 int ret = 0;
994 int wait_delay;
995 int abrt_conn = 0;
996 int count = 10;
997
998 wait_delay = 60 * HZ + DEF_MAX_RT_TIME;
999 qedi_ep = ep->dd_data;
1000 qedi = qedi_ep->qedi;
1001
1002 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
1003 goto ep_exit_recover;
1004
1005 if (qedi_ep->state != EP_STATE_OFLDCONN_NONE)
1006 flush_work(&qedi_ep->offload_work);
1007
1008 if (qedi_ep->conn) {
1009 qedi_conn = qedi_ep->conn;
1010 conn = qedi_conn->cls_conn->dd_data;
1011 iscsi_suspend_queue(conn);
1012 abrt_conn = qedi_conn->abrt_conn;
1013
1014 while (count--) {
1015 if (!test_bit(QEDI_CONN_FW_CLEANUP,
1016 &qedi_conn->flags)) {
1017 break;
1018 }
1019 msleep(1000);
1020 }
1021
1022 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
1023 if (qedi_do_not_recover) {
1024 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1025 "Do not recover cid=0x%x\n",
1026 qedi_ep->iscsi_cid);
1027 goto ep_exit_recover;
1028 }
1029 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1030 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
1031 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
1032 qedi_cleanup_active_cmd_list(qedi_conn);
1033 goto ep_release_conn;
1034 }
1035 }
1036
1037 if (qedi_do_not_recover)
1038 goto ep_exit_recover;
1039
1040 switch (qedi_ep->state) {
1041 case EP_STATE_OFLDCONN_START:
1042 case EP_STATE_OFLDCONN_NONE:
1043 goto ep_release_conn;
1044 case EP_STATE_OFLDCONN_FAILED:
1045 break;
1046 case EP_STATE_OFLDCONN_COMPL:
1047 if (unlikely(!qedi_conn))
1048 break;
1049
1050 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1051 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1052 qedi_conn->active_cmd_count, abrt_conn,
1053 qedi_ep->state,
1054 qedi_ep->iscsi_cid,
1055 qedi_ep->conn
1056 );
1057
1058 if (!qedi_conn->active_cmd_count)
1059 abrt_conn = 0;
1060 else
1061 abrt_conn = 1;
1062
1063 if (abrt_conn)
1064 qedi_clearsq(qedi, qedi_conn, NULL);
1065 break;
1066 default:
1067 break;
1068 }
1069
1070 if (!abrt_conn)
1071 wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer;
1072
1073 qedi_ep->state = EP_STATE_DISCONN_START;
1074
1075 if (test_bit(QEDI_IN_SHUTDOWN, &qedi->flags) ||
1076 test_bit(QEDI_IN_RECOVERY, &qedi->flags))
1077 goto ep_release_conn;
1078
1079 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1080 if (ret) {
1081 QEDI_WARN(&qedi->dbg_ctx,
1082 "destroy_conn failed returned %d\n", ret);
1083 } else {
1084 ret = wait_event_interruptible_timeout(
1085 qedi_ep->tcp_ofld_wait,
1086 (qedi_ep->state !=
1087 EP_STATE_DISCONN_START),
1088 wait_delay);
1089 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1090 QEDI_WARN(&qedi->dbg_ctx,
1091 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1092 ret, wait_delay, qedi_ep->iscsi_cid);
1093 }
1094 }
1095
1096 ep_release_conn:
1097 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1098 if (ret)
1099 QEDI_WARN(&qedi->dbg_ctx,
1100 "release_conn returned %d, cid=0x%x\n",
1101 ret, qedi_ep->iscsi_cid);
1102 ep_exit_recover:
1103 qedi_ep->state = EP_STATE_IDLE;
1104 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1105 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1106 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1107 qedi_free_sq(qedi, qedi_ep);
1108
1109 if (qedi_conn)
1110 qedi_conn->ep = NULL;
1111
1112 qedi_ep->conn = NULL;
1113 qedi_ep->qedi = NULL;
1114 atomic_dec(&qedi->num_offloads);
1115
1116 iscsi_destroy_endpoint(ep);
1117 }
1118
1119 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1120 {
1121 struct qed_dev *cdev = qedi->cdev;
1122 struct qedi_uio_dev *udev;
1123 struct qedi_uio_ctrl *uctrl;
1124 struct sk_buff *skb;
1125 u32 len;
1126 int rc = 0;
1127
1128 udev = qedi->udev;
1129 if (!udev) {
1130 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1131 return -EINVAL;
1132 }
1133
1134 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1135 if (!uctrl) {
1136 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1137 return -EINVAL;
1138 }
1139
1140 len = uctrl->host_tx_pkt_len;
1141 if (!len) {
1142 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1143 return -EINVAL;
1144 }
1145
1146 skb = alloc_skb(len, GFP_ATOMIC);
1147 if (!skb) {
1148 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1149 return -EINVAL;
1150 }
1151
1152 skb_put(skb, len);
1153 memcpy(skb->data, udev->tx_pkt, len);
1154 skb->ip_summed = CHECKSUM_NONE;
1155
1156 if (vlanid)
1157 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1158
1159 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0);
1160 if (rc) {
1161 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1162 rc);
1163 kfree_skb(skb);
1164 }
1165
1166 uctrl->host_tx_pkt_len = 0;
1167 uctrl->hw_tx_cons++;
1168
1169 return rc;
1170 }
1171
1172 static void qedi_offload_work(struct work_struct *work)
1173 {
1174 struct qedi_endpoint *qedi_ep =
1175 container_of(work, struct qedi_endpoint, offload_work);
1176 struct qedi_ctx *qedi;
1177 int wait_delay = 5 * HZ;
1178 int ret;
1179
1180 qedi = qedi_ep->qedi;
1181
1182 ret = qedi_iscsi_offload_conn(qedi_ep);
1183 if (ret) {
1184 QEDI_ERR(&qedi->dbg_ctx,
1185 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1186 qedi_ep->iscsi_cid, qedi_ep, ret);
1187 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1188 return;
1189 }
1190
1191 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1192 (qedi_ep->state ==
1193 EP_STATE_OFLDCONN_COMPL),
1194 wait_delay);
1195 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1196 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1197 QEDI_ERR(&qedi->dbg_ctx,
1198 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1199 qedi_ep->iscsi_cid, qedi_ep);
1200 }
1201 }
1202
1203 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1204 {
1205 struct qedi_ctx *qedi;
1206 struct qedi_endpoint *qedi_ep;
1207 int ret = 0;
1208 u32 iscsi_cid;
1209 u16 port_id = 0;
1210
1211 if (!shost) {
1212 ret = -ENXIO;
1213 QEDI_ERR(NULL, "shost is NULL\n");
1214 return ret;
1215 }
1216
1217 if (strcmp(shost->hostt->proc_name, "qedi")) {
1218 ret = -ENXIO;
1219 QEDI_ERR(NULL, "shost %s is invalid\n",
1220 shost->hostt->proc_name);
1221 return ret;
1222 }
1223
1224 qedi = iscsi_host_priv(shost);
1225 if (path_data->handle == QEDI_PATH_HANDLE) {
1226 ret = qedi_data_avail(qedi, path_data->vlan_id);
1227 goto set_path_exit;
1228 }
1229
1230 iscsi_cid = (u32)path_data->handle;
1231 if (iscsi_cid >= qedi->max_active_conns) {
1232 ret = -EINVAL;
1233 goto set_path_exit;
1234 }
1235 qedi_ep = qedi->ep_tbl[iscsi_cid];
1236 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1237 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
1238 if (!qedi_ep) {
1239 ret = -EINVAL;
1240 goto set_path_exit;
1241 }
1242
1243 if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
1244 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
1245 qedi_ep->state = EP_STATE_OFLDCONN_NONE;
1246 ret = -EIO;
1247 goto set_path_exit;
1248 }
1249
1250 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
1251 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
1252
1253 qedi_ep->vlan_id = path_data->vlan_id;
1254 if (path_data->pmtu < DEF_PATH_MTU) {
1255 qedi_ep->pmtu = qedi->ll2_mtu;
1256 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1257 "MTU cannot be %u, using default MTU %u\n",
1258 path_data->pmtu, qedi_ep->pmtu);
1259 }
1260
1261 if (path_data->pmtu != qedi->ll2_mtu) {
1262 if (path_data->pmtu > JUMBO_MTU) {
1263 ret = -EINVAL;
1264 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
1265 goto set_path_exit;
1266 }
1267
1268 qedi_reset_host_mtu(qedi, path_data->pmtu);
1269 qedi_ep->pmtu = qedi->ll2_mtu;
1270 }
1271
1272 port_id = qedi_ep->src_port;
1273 if (port_id >= QEDI_LOCAL_PORT_MIN &&
1274 port_id < QEDI_LOCAL_PORT_MAX) {
1275 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
1276 port_id = 0;
1277 } else {
1278 port_id = 0;
1279 }
1280
1281 if (!port_id) {
1282 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
1283 if (port_id == QEDI_LOCAL_PORT_INVALID) {
1284 QEDI_ERR(&qedi->dbg_ctx,
1285 "Failed to allocate port id for iscsi_cid=0x%x\n",
1286 iscsi_cid);
1287 ret = -ENOMEM;
1288 goto set_path_exit;
1289 }
1290 }
1291
1292 qedi_ep->src_port = port_id;
1293
1294 if (qedi_ep->ip_type == TCP_IPV4) {
1295 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
1296 sizeof(struct in_addr));
1297 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
1298 sizeof(struct in_addr));
1299 qedi->ip_type = TCP_IPV4;
1300
1301 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1302 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
1303 qedi_ep->src_addr, qedi_ep->src_port,
1304 qedi_ep->dst_addr, qedi_ep->dst_port);
1305 } else {
1306 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
1307 sizeof(struct in6_addr));
1308 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
1309 sizeof(struct in6_addr));
1310 qedi->ip_type = TCP_IPV6;
1311
1312 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1313 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
1314 qedi_ep->src_addr, qedi_ep->src_port,
1315 qedi_ep->dst_addr, qedi_ep->dst_port);
1316 }
1317
1318 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
1319 queue_work(qedi->offload_thread, &qedi_ep->offload_work);
1320
1321 ret = 0;
1322
1323 set_path_exit:
1324 return ret;
1325 }
1326
1327 static umode_t qedi_attr_is_visible(int param_type, int param)
1328 {
1329 switch (param_type) {
1330 case ISCSI_HOST_PARAM:
1331 switch (param) {
1332 case ISCSI_HOST_PARAM_NETDEV_NAME:
1333 case ISCSI_HOST_PARAM_HWADDRESS:
1334 case ISCSI_HOST_PARAM_IPADDRESS:
1335 return 0444;
1336 default:
1337 return 0;
1338 }
1339 case ISCSI_PARAM:
1340 switch (param) {
1341 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1342 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1343 case ISCSI_PARAM_HDRDGST_EN:
1344 case ISCSI_PARAM_DATADGST_EN:
1345 case ISCSI_PARAM_CONN_ADDRESS:
1346 case ISCSI_PARAM_CONN_PORT:
1347 case ISCSI_PARAM_EXP_STATSN:
1348 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1349 case ISCSI_PARAM_PERSISTENT_PORT:
1350 case ISCSI_PARAM_PING_TMO:
1351 case ISCSI_PARAM_RECV_TMO:
1352 case ISCSI_PARAM_INITIAL_R2T_EN:
1353 case ISCSI_PARAM_MAX_R2T:
1354 case ISCSI_PARAM_IMM_DATA_EN:
1355 case ISCSI_PARAM_FIRST_BURST:
1356 case ISCSI_PARAM_MAX_BURST:
1357 case ISCSI_PARAM_PDU_INORDER_EN:
1358 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1359 case ISCSI_PARAM_ERL:
1360 case ISCSI_PARAM_TARGET_NAME:
1361 case ISCSI_PARAM_TPGT:
1362 case ISCSI_PARAM_USERNAME:
1363 case ISCSI_PARAM_PASSWORD:
1364 case ISCSI_PARAM_USERNAME_IN:
1365 case ISCSI_PARAM_PASSWORD_IN:
1366 case ISCSI_PARAM_FAST_ABORT:
1367 case ISCSI_PARAM_ABORT_TMO:
1368 case ISCSI_PARAM_LU_RESET_TMO:
1369 case ISCSI_PARAM_TGT_RESET_TMO:
1370 case ISCSI_PARAM_IFACE_NAME:
1371 case ISCSI_PARAM_INITIATOR_NAME:
1372 case ISCSI_PARAM_BOOT_ROOT:
1373 case ISCSI_PARAM_BOOT_NIC:
1374 case ISCSI_PARAM_BOOT_TARGET:
1375 return 0444;
1376 default:
1377 return 0;
1378 }
1379 }
1380
1381 return 0;
1382 }
1383
1384 static void qedi_cleanup_task(struct iscsi_task *task)
1385 {
1386 if (!task->sc || task->state == ISCSI_TASK_PENDING) {
1387 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
1388 refcount_read(&task->refcount));
1389 return;
1390 }
1391
1392 qedi_iscsi_unmap_sg_list(task->dd_data);
1393 }
1394
1395 struct iscsi_transport qedi_iscsi_transport = {
1396 .owner = THIS_MODULE,
1397 .name = QEDI_MODULE_NAME,
1398 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
1399 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
1400 .create_session = qedi_session_create,
1401 .destroy_session = qedi_session_destroy,
1402 .create_conn = qedi_conn_create,
1403 .bind_conn = qedi_conn_bind,
1404 .start_conn = qedi_conn_start,
1405 .stop_conn = iscsi_conn_stop,
1406 .destroy_conn = qedi_conn_destroy,
1407 .set_param = iscsi_set_param,
1408 .get_ep_param = qedi_ep_get_param,
1409 .get_conn_param = iscsi_conn_get_param,
1410 .get_session_param = iscsi_session_get_param,
1411 .get_host_param = qedi_host_get_param,
1412 .send_pdu = iscsi_conn_send_pdu,
1413 .get_stats = qedi_conn_get_stats,
1414 .xmit_task = qedi_task_xmit,
1415 .cleanup_task = qedi_cleanup_task,
1416 .session_recovery_timedout = iscsi_session_recovery_timedout,
1417 .ep_connect = qedi_ep_connect,
1418 .ep_poll = qedi_ep_poll,
1419 .ep_disconnect = qedi_ep_disconnect,
1420 .set_path = qedi_set_path,
1421 .attr_is_visible = qedi_attr_is_visible,
1422 };
1423
1424 void qedi_start_conn_recovery(struct qedi_ctx *qedi,
1425 struct qedi_conn *qedi_conn)
1426 {
1427 struct iscsi_cls_session *cls_sess;
1428 struct iscsi_cls_conn *cls_conn;
1429 struct iscsi_conn *conn;
1430
1431 cls_conn = qedi_conn->cls_conn;
1432 conn = cls_conn->dd_data;
1433 cls_sess = iscsi_conn_to_session(cls_conn);
1434
1435 if (iscsi_is_session_online(cls_sess)) {
1436 qedi_conn->abrt_conn = 1;
1437 QEDI_ERR(&qedi->dbg_ctx,
1438 "Failing connection, state=0x%x, cid=0x%x\n",
1439 conn->session->state, qedi_conn->iscsi_conn_id);
1440 iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
1441 ISCSI_ERR_CONN_FAILED);
1442 }
1443 }
1444
1445 static const struct {
1446 enum iscsi_error_types error_code;
1447 char *err_string;
1448 } qedi_iscsi_error[] = {
1449 { ISCSI_STATUS_NONE,
1450 "tcp_error none"
1451 },
1452 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
1453 "task cid mismatch"
1454 },
1455 { ISCSI_CONN_ERROR_TASK_NOT_VALID,
1456 "invalid task"
1457 },
1458 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
1459 "rq ring full"
1460 },
1461 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
1462 "cmdq ring full"
1463 },
1464 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
1465 "sge caching failed"
1466 },
1467 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
1468 "hdr digest error"
1469 },
1470 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
1471 "local cmpl error"
1472 },
1473 { ISCSI_CONN_ERROR_DATA_OVERRUN,
1474 "invalid task"
1475 },
1476 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
1477 "out of sge error"
1478 },
1479 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
1480 "tcp ip fragment error"
1481 },
1482 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
1483 "AHS len protocol error"
1484 },
1485 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
1486 "itt out of range error"
1487 },
1488 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
1489 "data seg more than pdu size"
1490 },
1491 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
1492 "invalid opcode"
1493 },
1494 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
1495 "invalid opcode before update"
1496 },
1497 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
1498 "unexpected opcode"
1499 },
1500 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
1501 "r2t carries no data"
1502 },
1503 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
1504 "data sn error"
1505 },
1506 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
1507 "data TTT error"
1508 },
1509 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
1510 "r2t TTT error"
1511 },
1512 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
1513 "buffer offset error"
1514 },
1515 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
1516 "buffer offset ooo"
1517 },
1518 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
1519 "data seg len 0"
1520 },
1521 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
1522 "data xer len error"
1523 },
1524 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
1525 "data xer len1 error"
1526 },
1527 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
1528 "data xer len2 error"
1529 },
1530 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
1531 "protocol lun error"
1532 },
1533 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
1534 "f bit zero error"
1535 },
1536 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
1537 "exp stat sn error"
1538 },
1539 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
1540 "dsl not zero error"
1541 },
1542 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
1543 "invalid dsl"
1544 },
1545 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
1546 "data seg len too big"
1547 },
1548 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
1549 "outstanding r2t count error"
1550 },
1551 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
1552 "sense datalen error"
1553 },
1554 };
1555
1556 static char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
1557 {
1558 int i;
1559 char *msg = NULL;
1560
1561 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
1562 if (qedi_iscsi_error[i].error_code == err_code) {
1563 msg = qedi_iscsi_error[i].err_string;
1564 break;
1565 }
1566 }
1567 return msg;
1568 }
1569
1570 void qedi_process_iscsi_error(struct qedi_endpoint *ep,
1571 struct iscsi_eqe_data *data)
1572 {
1573 struct qedi_conn *qedi_conn;
1574 struct qedi_ctx *qedi;
1575 char warn_notice[] = "iscsi_warning";
1576 char error_notice[] = "iscsi_error";
1577 char unknown_msg[] = "Unknown error";
1578 char *message;
1579 int need_recovery = 0;
1580 u32 err_mask = 0;
1581 char *msg;
1582
1583 if (!ep)
1584 return;
1585
1586 qedi_conn = ep->conn;
1587 if (!qedi_conn)
1588 return;
1589
1590 qedi = ep->qedi;
1591
1592 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
1593 data->error_code);
1594
1595 if (err_mask) {
1596 need_recovery = 0;
1597 message = warn_notice;
1598 } else {
1599 need_recovery = 1;
1600 message = error_notice;
1601 }
1602
1603 msg = qedi_get_iscsi_error(data->error_code);
1604 if (!msg) {
1605 need_recovery = 0;
1606 msg = unknown_msg;
1607 }
1608
1609 iscsi_conn_printk(KERN_ALERT,
1610 qedi_conn->cls_conn->dd_data,
1611 "qedi: %s - %s\n", message, msg);
1612
1613 if (need_recovery)
1614 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1615 }
1616
1617 void qedi_clear_session_ctx(struct iscsi_cls_session *cls_sess)
1618 {
1619 struct iscsi_session *session = cls_sess->dd_data;
1620 struct iscsi_conn *conn = session->leadconn;
1621 struct qedi_conn *qedi_conn = conn->dd_data;
1622
1623 if (iscsi_is_session_online(cls_sess))
1624 qedi_ep_disconnect(qedi_conn->iscsi_ep);
1625
1626 qedi_conn_destroy(qedi_conn->cls_conn);
1627
1628 qedi_session_destroy(cls_sess);
1629 }
1630
1631 void qedi_process_tcp_error(struct qedi_endpoint *ep,
1632 struct iscsi_eqe_data *data)
1633 {
1634 struct qedi_conn *qedi_conn;
1635
1636 if (!ep)
1637 return;
1638
1639 qedi_conn = ep->conn;
1640 if (!qedi_conn)
1641 return;
1642
1643 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
1644 data->error_code);
1645
1646 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1647 }
Linux with added FPC-III support