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Input: dlink-dir685-touchkeys - fix a typo in driver name
[linux/fpc-iii.git] / drivers / scsi / qedi / qedi_iscsi.c
blob1b7049dce1699becfee72df21afb53526ea2fc31
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 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 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
840 if (!ep) {
841 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
842 ret = -ENOMEM;
843 return ERR_PTR(ret);
844 }
845 qedi_ep = ep->dd_data;
846 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
847 qedi_ep->state = EP_STATE_IDLE;
848 qedi_ep->iscsi_cid = (u32)-1;
849 qedi_ep->qedi = qedi;
850
851 if (dst_addr->sa_family == AF_INET) {
852 addr = (struct sockaddr_in *)dst_addr;
853 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
854 sizeof(struct in_addr));
855 qedi_ep->dst_port = ntohs(addr->sin_port);
856 qedi_ep->ip_type = TCP_IPV4;
857 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
858 "dst_addr=%pI4, dst_port=%u\n",
859 qedi_ep->dst_addr, qedi_ep->dst_port);
860 } else if (dst_addr->sa_family == AF_INET6) {
861 addr6 = (struct sockaddr_in6 *)dst_addr;
862 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
863 sizeof(struct in6_addr));
864 qedi_ep->dst_port = ntohs(addr6->sin6_port);
865 qedi_ep->ip_type = TCP_IPV6;
866 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
867 "dst_addr=%pI6, dst_port=%u\n",
868 qedi_ep->dst_addr, qedi_ep->dst_port);
869 } else {
870 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
871 }
872
873 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
874 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
875 ret = -ENXIO;
876 goto ep_conn_exit;
877 }
878
879 ret = qedi_alloc_sq(qedi, qedi_ep);
880 if (ret)
881 goto ep_conn_exit;
882
883 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
884 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
885
886 if (ret) {
887 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
888 ret = -ENXIO;
889 goto ep_free_sq;
890 }
891
892 iscsi_cid = qedi_ep->handle;
893 qedi_ep->iscsi_cid = iscsi_cid;
894
895 init_waitqueue_head(&qedi_ep->ofld_wait);
896 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
897 qedi_ep->state = EP_STATE_OFLDCONN_START;
898 qedi->ep_tbl[iscsi_cid] = qedi_ep;
899
900 buf = (char *)&path_req;
901 len = sizeof(path_req);
902 memset(&path_req, 0, len);
903
904 msg_type = ISCSI_KEVENT_PATH_REQ;
905 path_req.handle = (u64)qedi_ep->iscsi_cid;
906 path_req.pmtu = qedi->ll2_mtu;
907 qedi_ep->pmtu = qedi->ll2_mtu;
908 if (qedi_ep->ip_type == TCP_IPV4) {
909 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
910 sizeof(struct in_addr));
911 path_req.ip_addr_len = 4;
912 } else {
913 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
914 sizeof(struct in6_addr));
915 path_req.ip_addr_len = 16;
916 }
917
918 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
919 len);
920 if (ret) {
921 QEDI_ERR(&qedi->dbg_ctx,
922 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
923 iscsi_cid, ret);
924 goto ep_rel_conn;
925 }
926
927 atomic_inc(&qedi->num_offloads);
928 return ep;
929
930 ep_rel_conn:
931 qedi->ep_tbl[iscsi_cid] = NULL;
932 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
933 if (tmp)
934 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
935 tmp);
936 ep_free_sq:
937 qedi_free_sq(qedi, qedi_ep);
938 ep_conn_exit:
939 iscsi_destroy_endpoint(ep);
940 return ERR_PTR(ret);
941 }
942
943 static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
944 {
945 struct qedi_endpoint *qedi_ep;
946 int ret = 0;
947
948 if (qedi_do_not_recover)
949 return 1;
950
951 qedi_ep = ep->dd_data;
952 if (qedi_ep->state == EP_STATE_IDLE ||
953 qedi_ep->state == EP_STATE_OFLDCONN_NONE ||
954 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
955 return -1;
956
957 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
958 ret = 1;
959
960 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
961 QEDI_OFLD_WAIT_STATE(qedi_ep),
962 msecs_to_jiffies(timeout_ms));
963
964 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
965 ret = -1;
966
967 if (ret > 0)
968 return 1;
969 else if (!ret)
970 return 0;
971 else
972 return ret;
973 }
974
975 static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
976 {
977 struct qedi_cmd *cmd, *cmd_tmp;
978
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 }
985
986 static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
987 {
988 struct qedi_endpoint *qedi_ep;
989 struct qedi_conn *qedi_conn = NULL;
990 struct iscsi_conn *conn = NULL;
991 struct qedi_ctx *qedi;
992 int ret = 0;
993 int wait_delay = 20 * HZ;
994 int abrt_conn = 0;
995 int count = 10;
996
997 qedi_ep = ep->dd_data;
998 qedi = qedi_ep->qedi;
999
1000 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
1001 goto ep_exit_recover;
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 case EP_STATE_OFLDCONN_NONE:
1040 goto ep_release_conn;
1041 case EP_STATE_OFLDCONN_FAILED:
1042 break;
1043 case EP_STATE_OFLDCONN_COMPL:
1044 if (unlikely(!qedi_conn))
1045 break;
1046
1047 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1048 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1049 qedi_conn->active_cmd_count, abrt_conn,
1050 qedi_ep->state,
1051 qedi_ep->iscsi_cid,
1052 qedi_ep->conn
1053 );
1054
1055 if (!qedi_conn->active_cmd_count)
1056 abrt_conn = 0;
1057 else
1058 abrt_conn = 1;
1059
1060 if (abrt_conn)
1061 qedi_clearsq(qedi, qedi_conn, NULL);
1062 break;
1063 default:
1064 break;
1065 }
1066
1067 qedi_ep->state = EP_STATE_DISCONN_START;
1068 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1069 if (ret) {
1070 QEDI_WARN(&qedi->dbg_ctx,
1071 "destroy_conn failed returned %d\n", ret);
1072 } else {
1073 ret = wait_event_interruptible_timeout(
1074 qedi_ep->tcp_ofld_wait,
1075 (qedi_ep->state !=
1076 EP_STATE_DISCONN_START),
1077 wait_delay);
1078 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1079 QEDI_WARN(&qedi->dbg_ctx,
1080 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1081 ret, wait_delay, qedi_ep->iscsi_cid);
1082 }
1083 }
1084
1085 ep_release_conn:
1086 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1087 if (ret)
1088 QEDI_WARN(&qedi->dbg_ctx,
1089 "release_conn returned %d, cid=0x%x\n",
1090 ret, qedi_ep->iscsi_cid);
1091 ep_exit_recover:
1092 qedi_ep->state = EP_STATE_IDLE;
1093 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1094 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1095 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1096 qedi_free_sq(qedi, qedi_ep);
1097
1098 if (qedi_conn)
1099 qedi_conn->ep = NULL;
1100
1101 qedi_ep->conn = NULL;
1102 qedi_ep->qedi = NULL;
1103 atomic_dec(&qedi->num_offloads);
1104
1105 iscsi_destroy_endpoint(ep);
1106 }
1107
1108 static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1109 {
1110 struct qed_dev *cdev = qedi->cdev;
1111 struct qedi_uio_dev *udev;
1112 struct qedi_uio_ctrl *uctrl;
1113 struct sk_buff *skb;
1114 u32 len;
1115 int rc = 0;
1116
1117 udev = qedi->udev;
1118 if (!udev) {
1119 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1120 return -EINVAL;
1121 }
1122
1123 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1124 if (!uctrl) {
1125 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1126 return -EINVAL;
1127 }
1128
1129 len = uctrl->host_tx_pkt_len;
1130 if (!len) {
1131 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1132 return -EINVAL;
1133 }
1134
1135 skb = alloc_skb(len, GFP_ATOMIC);
1136 if (!skb) {
1137 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1138 return -EINVAL;
1139 }
1140
1141 skb_put(skb, len);
1142 memcpy(skb->data, udev->tx_pkt, len);
1143 skb->ip_summed = CHECKSUM_NONE;
1144
1145 if (vlanid)
1146 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1147
1148 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0);
1149 if (rc) {
1150 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1151 rc);
1152 kfree_skb(skb);
1153 }
1154
1155 uctrl->host_tx_pkt_len = 0;
1156 uctrl->hw_tx_cons++;
1157
1158 return rc;
1159 }
1160
1161 static void qedi_offload_work(struct work_struct *work)
1162 {
1163 struct qedi_endpoint *qedi_ep =
1164 container_of(work, struct qedi_endpoint, offload_work);
1165 struct qedi_ctx *qedi;
1166 int wait_delay = 20 * HZ;
1167 int ret;
1168
1169 qedi = qedi_ep->qedi;
1170
1171 ret = qedi_iscsi_offload_conn(qedi_ep);
1172 if (ret) {
1173 QEDI_ERR(&qedi->dbg_ctx,
1174 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1175 qedi_ep->iscsi_cid, qedi_ep, ret);
1176 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1177 return;
1178 }
1179
1180 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1181 (qedi_ep->state ==
1182 EP_STATE_OFLDCONN_COMPL),
1183 wait_delay);
1184 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1185 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1186 QEDI_ERR(&qedi->dbg_ctx,
1187 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1188 qedi_ep->iscsi_cid, qedi_ep);
1189 }
1190 }
1191
1192 static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1193 {
1194 struct qedi_ctx *qedi;
1195 struct qedi_endpoint *qedi_ep;
1196 int ret = 0;
1197 u32 iscsi_cid;
1198 u16 port_id = 0;
1199
1200 if (!shost) {
1201 ret = -ENXIO;
1202 QEDI_ERR(NULL, "shost is NULL\n");
1203 return ret;
1204 }
1205
1206 if (strcmp(shost->hostt->proc_name, "qedi")) {
1207 ret = -ENXIO;
1208 QEDI_ERR(NULL, "shost %s is invalid\n",
1209 shost->hostt->proc_name);
1210 return ret;
1211 }
1212
1213 qedi = iscsi_host_priv(shost);
1214 if (path_data->handle == QEDI_PATH_HANDLE) {
1215 ret = qedi_data_avail(qedi, path_data->vlan_id);
1216 goto set_path_exit;
1217 }
1218
1219 iscsi_cid = (u32)path_data->handle;
1220 qedi_ep = qedi->ep_tbl[iscsi_cid];
1221 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1222 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
1223 if (!qedi_ep) {
1224 ret = -EINVAL;
1225 goto set_path_exit;
1226 }
1227
1228 if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
1229 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
1230 qedi_ep->state = EP_STATE_OFLDCONN_NONE;
1231 ret = -EIO;
1232 goto set_path_exit;
1233 }
1234
1235 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
1236 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
1237
1238 qedi_ep->vlan_id = path_data->vlan_id;
1239 if (path_data->pmtu < DEF_PATH_MTU) {
1240 qedi_ep->pmtu = qedi->ll2_mtu;
1241 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1242 "MTU cannot be %u, using default MTU %u\n",
1243 path_data->pmtu, qedi_ep->pmtu);
1244 }
1245
1246 if (path_data->pmtu != qedi->ll2_mtu) {
1247 if (path_data->pmtu > JUMBO_MTU) {
1248 ret = -EINVAL;
1249 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
1250 goto set_path_exit;
1251 }
1252
1253 qedi_reset_host_mtu(qedi, path_data->pmtu);
1254 qedi_ep->pmtu = qedi->ll2_mtu;
1255 }
1256
1257 port_id = qedi_ep->src_port;
1258 if (port_id >= QEDI_LOCAL_PORT_MIN &&
1259 port_id < QEDI_LOCAL_PORT_MAX) {
1260 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
1261 port_id = 0;
1262 } else {
1263 port_id = 0;
1264 }
1265
1266 if (!port_id) {
1267 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
1268 if (port_id == QEDI_LOCAL_PORT_INVALID) {
1269 QEDI_ERR(&qedi->dbg_ctx,
1270 "Failed to allocate port id for iscsi_cid=0x%x\n",
1271 iscsi_cid);
1272 ret = -ENOMEM;
1273 goto set_path_exit;
1274 }
1275 }
1276
1277 qedi_ep->src_port = port_id;
1278
1279 if (qedi_ep->ip_type == TCP_IPV4) {
1280 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
1281 sizeof(struct in_addr));
1282 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
1283 sizeof(struct in_addr));
1284 qedi->ip_type = TCP_IPV4;
1285
1286 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1287 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
1288 qedi_ep->src_addr, qedi_ep->src_port,
1289 qedi_ep->dst_addr, qedi_ep->dst_port);
1290 } else {
1291 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
1292 sizeof(struct in6_addr));
1293 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
1294 sizeof(struct in6_addr));
1295 qedi->ip_type = TCP_IPV6;
1296
1297 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1298 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
1299 qedi_ep->src_addr, qedi_ep->src_port,
1300 qedi_ep->dst_addr, qedi_ep->dst_port);
1301 }
1302
1303 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
1304 queue_work(qedi->offload_thread, &qedi_ep->offload_work);
1305
1306 ret = 0;
1307
1308 set_path_exit:
1309 return ret;
1310 }
1311
1312 static umode_t qedi_attr_is_visible(int param_type, int param)
1313 {
1314 switch (param_type) {
1315 case ISCSI_HOST_PARAM:
1316 switch (param) {
1317 case ISCSI_HOST_PARAM_NETDEV_NAME:
1318 case ISCSI_HOST_PARAM_HWADDRESS:
1319 case ISCSI_HOST_PARAM_IPADDRESS:
1320 return 0444;
1321 default:
1322 return 0;
1323 }
1324 case ISCSI_PARAM:
1325 switch (param) {
1326 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1327 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1328 case ISCSI_PARAM_HDRDGST_EN:
1329 case ISCSI_PARAM_DATADGST_EN:
1330 case ISCSI_PARAM_CONN_ADDRESS:
1331 case ISCSI_PARAM_CONN_PORT:
1332 case ISCSI_PARAM_EXP_STATSN:
1333 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1334 case ISCSI_PARAM_PERSISTENT_PORT:
1335 case ISCSI_PARAM_PING_TMO:
1336 case ISCSI_PARAM_RECV_TMO:
1337 case ISCSI_PARAM_INITIAL_R2T_EN:
1338 case ISCSI_PARAM_MAX_R2T:
1339 case ISCSI_PARAM_IMM_DATA_EN:
1340 case ISCSI_PARAM_FIRST_BURST:
1341 case ISCSI_PARAM_MAX_BURST:
1342 case ISCSI_PARAM_PDU_INORDER_EN:
1343 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1344 case ISCSI_PARAM_ERL:
1345 case ISCSI_PARAM_TARGET_NAME:
1346 case ISCSI_PARAM_TPGT:
1347 case ISCSI_PARAM_USERNAME:
1348 case ISCSI_PARAM_PASSWORD:
1349 case ISCSI_PARAM_USERNAME_IN:
1350 case ISCSI_PARAM_PASSWORD_IN:
1351 case ISCSI_PARAM_FAST_ABORT:
1352 case ISCSI_PARAM_ABORT_TMO:
1353 case ISCSI_PARAM_LU_RESET_TMO:
1354 case ISCSI_PARAM_TGT_RESET_TMO:
1355 case ISCSI_PARAM_IFACE_NAME:
1356 case ISCSI_PARAM_INITIATOR_NAME:
1357 case ISCSI_PARAM_BOOT_ROOT:
1358 case ISCSI_PARAM_BOOT_NIC:
1359 case ISCSI_PARAM_BOOT_TARGET:
1360 return 0444;
1361 default:
1362 return 0;
1363 }
1364 }
1365
1366 return 0;
1367 }
1368
1369 static void qedi_cleanup_task(struct iscsi_task *task)
1370 {
1371 if (!task->sc || task->state == ISCSI_TASK_PENDING) {
1372 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
1373 refcount_read(&task->refcount));
1374 return;
1375 }
1376
1377 qedi_iscsi_unmap_sg_list(task->dd_data);
1378 }
1379
1380 struct iscsi_transport qedi_iscsi_transport = {
1381 .owner = THIS_MODULE,
1382 .name = QEDI_MODULE_NAME,
1383 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
1384 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
1385 .create_session = qedi_session_create,
1386 .destroy_session = qedi_session_destroy,
1387 .create_conn = qedi_conn_create,
1388 .bind_conn = qedi_conn_bind,
1389 .start_conn = qedi_conn_start,
1390 .stop_conn = iscsi_conn_stop,
1391 .destroy_conn = qedi_conn_destroy,
1392 .set_param = iscsi_set_param,
1393 .get_ep_param = qedi_ep_get_param,
1394 .get_conn_param = iscsi_conn_get_param,
1395 .get_session_param = iscsi_session_get_param,
1396 .get_host_param = qedi_host_get_param,
1397 .send_pdu = iscsi_conn_send_pdu,
1398 .get_stats = qedi_conn_get_stats,
1399 .xmit_task = qedi_task_xmit,
1400 .cleanup_task = qedi_cleanup_task,
1401 .session_recovery_timedout = iscsi_session_recovery_timedout,
1402 .ep_connect = qedi_ep_connect,
1403 .ep_poll = qedi_ep_poll,
1404 .ep_disconnect = qedi_ep_disconnect,
1405 .set_path = qedi_set_path,
1406 .attr_is_visible = qedi_attr_is_visible,
1407 };
1408
1409 void qedi_start_conn_recovery(struct qedi_ctx *qedi,
1410 struct qedi_conn *qedi_conn)
1411 {
1412 struct iscsi_cls_session *cls_sess;
1413 struct iscsi_cls_conn *cls_conn;
1414 struct iscsi_conn *conn;
1415
1416 cls_conn = qedi_conn->cls_conn;
1417 conn = cls_conn->dd_data;
1418 cls_sess = iscsi_conn_to_session(cls_conn);
1419
1420 if (iscsi_is_session_online(cls_sess)) {
1421 qedi_conn->abrt_conn = 1;
1422 QEDI_ERR(&qedi->dbg_ctx,
1423 "Failing connection, state=0x%x, cid=0x%x\n",
1424 conn->session->state, qedi_conn->iscsi_conn_id);
1425 iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
1426 ISCSI_ERR_CONN_FAILED);
1427 }
1428 }
1429
1430 static const struct {
1431 enum iscsi_error_types error_code;
1432 char *err_string;
1433 } qedi_iscsi_error[] = {
1434 { ISCSI_STATUS_NONE,
1435 "tcp_error none"
1436 },
1437 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
1438 "task cid mismatch"
1439 },
1440 { ISCSI_CONN_ERROR_TASK_NOT_VALID,
1441 "invalid task"
1442 },
1443 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
1444 "rq ring full"
1445 },
1446 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
1447 "cmdq ring full"
1448 },
1449 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
1450 "sge caching failed"
1451 },
1452 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
1453 "hdr digest error"
1454 },
1455 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
1456 "local cmpl error"
1457 },
1458 { ISCSI_CONN_ERROR_DATA_OVERRUN,
1459 "invalid task"
1460 },
1461 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
1462 "out of sge error"
1463 },
1464 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
1465 "tcp ip fragment error"
1466 },
1467 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
1468 "AHS len protocol error"
1469 },
1470 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
1471 "itt out of range error"
1472 },
1473 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
1474 "data seg more than pdu size"
1475 },
1476 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
1477 "invalid opcode"
1478 },
1479 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
1480 "invalid opcode before update"
1481 },
1482 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
1483 "unexpected opcode"
1484 },
1485 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
1486 "r2t carries no data"
1487 },
1488 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
1489 "data sn error"
1490 },
1491 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
1492 "data TTT error"
1493 },
1494 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
1495 "r2t TTT error"
1496 },
1497 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
1498 "buffer offset error"
1499 },
1500 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
1501 "buffer offset ooo"
1502 },
1503 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
1504 "data seg len 0"
1505 },
1506 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
1507 "data xer len error"
1508 },
1509 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
1510 "data xer len1 error"
1511 },
1512 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
1513 "data xer len2 error"
1514 },
1515 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
1516 "protocol lun error"
1517 },
1518 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
1519 "f bit zero error"
1520 },
1521 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
1522 "exp stat sn error"
1523 },
1524 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
1525 "dsl not zero error"
1526 },
1527 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
1528 "invalid dsl"
1529 },
1530 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
1531 "data seg len too big"
1532 },
1533 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
1534 "outstanding r2t count error"
1535 },
1536 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
1537 "sense datalen error"
1538 },
1539 };
1540
1541 char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
1542 {
1543 int i;
1544 char *msg = NULL;
1545
1546 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
1547 if (qedi_iscsi_error[i].error_code == err_code) {
1548 msg = qedi_iscsi_error[i].err_string;
1549 break;
1550 }
1551 }
1552 return msg;
1553 }
1554
1555 void qedi_process_iscsi_error(struct qedi_endpoint *ep,
1556 struct iscsi_eqe_data *data)
1557 {
1558 struct qedi_conn *qedi_conn;
1559 struct qedi_ctx *qedi;
1560 char warn_notice[] = "iscsi_warning";
1561 char error_notice[] = "iscsi_error";
1562 char unknown_msg[] = "Unknown error";
1563 char *message;
1564 int need_recovery = 0;
1565 u32 err_mask = 0;
1566 char *msg;
1567
1568 if (!ep)
1569 return;
1570
1571 qedi_conn = ep->conn;
1572 if (!qedi_conn)
1573 return;
1574
1575 qedi = ep->qedi;
1576
1577 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
1578 data->error_code);
1579
1580 if (err_mask) {
1581 need_recovery = 0;
1582 message = warn_notice;
1583 } else {
1584 need_recovery = 1;
1585 message = error_notice;
1586 }
1587
1588 msg = qedi_get_iscsi_error(data->error_code);
1589 if (!msg) {
1590 need_recovery = 0;
1591 msg = unknown_msg;
1592 }
1593
1594 iscsi_conn_printk(KERN_ALERT,
1595 qedi_conn->cls_conn->dd_data,
1596 "qedi: %s - %s\n", message, msg);
1597
1598 if (need_recovery)
1599 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1600 }
1601
1602 void qedi_process_tcp_error(struct qedi_endpoint *ep,
1603 struct iscsi_eqe_data *data)
1604 {
1605 struct qedi_conn *qedi_conn;
1606
1607 if (!ep)
1608 return;
1609
1610 qedi_conn = ep->conn;
1611 if (!qedi_conn)
1612 return;
1613
1614 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
1615 data->error_code);
1616
1617 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1618 }
Linux with added FPC-III support