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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
20int 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
36static 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
46struct 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
68static 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
102static 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
145login_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
151login_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;
156login_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;
161login_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
167static 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
191static 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
211static 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
236free_sgets:
237 qedi_destroy_cmd_pool(qedi, session);
238 return -ENOMEM;
239}
240
241static struct iscsi_cls_session *
242qedi_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
279session_teardown:
280 iscsi_session_teardown(cls_session);
281 return NULL;
282}
283
284static 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
294static struct iscsi_cls_conn *
295qedi_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
330free_conn:
331 iscsi_conn_teardown(cls_conn);
332 return NULL;
333}
334
335void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
336{
337 iscsi_block_session(cls_session);
338}
339
340void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
341{
342 iscsi_unblock_session(cls_session);
343}
344
345static 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
361struct 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
374static 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_ep = ep;
400 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
401 qedi_conn->fw_cid = qedi_ep->fw_cid;
402 qedi_conn->cmd_cleanup_req = 0;
403 qedi_conn->cmd_cleanup_cmpl = 0;
404
405 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn))
406 return -EINVAL;
407
408 spin_lock_init(&qedi_conn->tmf_work_lock);
409 INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
410 init_waitqueue_head(&qedi_conn->wait_queue);
411 return 0;
412}
413
414static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
415 struct qedi_conn *qedi_conn)
416{
417 struct qed_iscsi_params_update *conn_info;
418 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
419 struct iscsi_conn *conn = cls_conn->dd_data;
420 struct qedi_endpoint *qedi_ep;
421 int rval;
422
423 qedi_ep = qedi_conn->ep;
424
425 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
426 if (!conn_info) {
427 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
428 return -ENOMEM;
429 }
430
431 conn_info->update_flag = 0;
432
433 if (conn->hdrdgst_en)
434 SET_FIELD(conn_info->update_flag,
435 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
436 if (conn->datadgst_en)
437 SET_FIELD(conn_info->update_flag,
438 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
439 if (conn->session->initial_r2t_en)
440 SET_FIELD(conn_info->update_flag,
441 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
442 true);
443 if (conn->session->imm_data_en)
444 SET_FIELD(conn_info->update_flag,
445 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
446 true);
447
448 conn_info->max_seq_size = conn->session->max_burst;
449 conn_info->max_recv_pdu_length = conn->max_recv_dlength;
450 conn_info->max_send_pdu_length = conn->max_xmit_dlength;
451 conn_info->first_seq_length = conn->session->first_burst;
452 conn_info->exp_stat_sn = conn->exp_statsn;
453
454 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
455 conn_info);
456 if (rval) {
457 rval = -ENXIO;
458 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
459 }
460
461 kfree(conn_info);
462 return rval;
463}
464
465static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
466{
467 u16 mss = 0;
468 u16 hdrs = TCP_HDR_LEN;
469
470 if (is_ipv6)
471 hdrs += IPV6_HDR_LEN;
472 else
473 hdrs += IPV4_HDR_LEN;
474
475 mss = pmtu - hdrs;
476
477 if (!mss)
478 mss = DEF_MSS;
479
480 return mss;
481}
482
483static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
484{
485 struct qedi_ctx *qedi = qedi_ep->qedi;
486 struct qed_iscsi_params_offload *conn_info;
487 int rval;
488 int i;
489
490 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
491 if (!conn_info) {
492 QEDI_ERR(&qedi->dbg_ctx,
493 "Failed to allocate memory ep=%p\n", qedi_ep);
494 return -ENOMEM;
495 }
496
497 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
498 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
499
500 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
501 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
502
503 if (qedi_ep->ip_type == TCP_IPV4) {
504 conn_info->ip_version = 0;
505 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
506 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
507 qedi_ep->src_addr, qedi_ep->dst_addr);
508 } else {
509 for (i = 1; i < 4; i++) {
510 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
511 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
512 }
513
514 conn_info->ip_version = 1;
515 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
516 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
517 qedi_ep->src_addr, qedi_ep->dst_addr);
518 }
519
520 conn_info->src.port = qedi_ep->src_port;
521 conn_info->dst.port = qedi_ep->dst_port;
522
523 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
524 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
525 conn_info->vlan_id = qedi_ep->vlan_id;
526
527 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
528 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
529 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
530 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
531
532 conn_info->default_cq = (qedi_ep->fw_cid % qedi->num_queues);
533
534 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
535 conn_info->dup_ack_theshold = 3;
536 conn_info->rcv_wnd = 65535;
537
538 conn_info->ss_thresh = 65535;
539 conn_info->srtt = 300;
540 conn_info->rtt_var = 150;
541 conn_info->flow_label = 0;
542 conn_info->ka_timeout = DEF_KA_TIMEOUT;
543 conn_info->ka_interval = DEF_KA_INTERVAL;
544 conn_info->max_rt_time = DEF_MAX_RT_TIME;
545 conn_info->ttl = DEF_TTL;
546 conn_info->tos_or_tc = DEF_TOS;
547 conn_info->remote_port = qedi_ep->dst_port;
548 conn_info->local_port = qedi_ep->src_port;
549
550 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
551 (qedi_ep->ip_type == TCP_IPV6),
552 1, (qedi_ep->vlan_id != 0));
553
554 conn_info->cwnd = DEF_MAX_CWND * conn_info->mss;
555 conn_info->rcv_wnd_scale = 4;
556 conn_info->da_timeout_value = 200;
557 conn_info->ack_frequency = 2;
558
559 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
560 "Default cq index [%d], mss [%d]\n",
561 conn_info->default_cq, conn_info->mss);
562
563 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
564 if (rval)
565 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
566 rval, qedi_ep);
567
568 kfree(conn_info);
569 return rval;
570}
571
572static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
573{
574 struct iscsi_conn *conn = cls_conn->dd_data;
575 struct qedi_conn *qedi_conn = conn->dd_data;
576 struct qedi_ctx *qedi;
577 int rval;
578
579 qedi = qedi_conn->qedi;
580
581 rval = qedi_iscsi_update_conn(qedi, qedi_conn);
582 if (rval) {
583 iscsi_conn_printk(KERN_ALERT, conn,
584 "conn_start: FW offload conn failed.\n");
585 rval = -EINVAL;
586 goto start_err;
587 }
588
589 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
590 qedi_conn->abrt_conn = 0;
591
592 rval = iscsi_conn_start(cls_conn);
593 if (rval) {
594 iscsi_conn_printk(KERN_ALERT, conn,
595 "iscsi_conn_start: FW offload conn failed!!\n");
596 }
597
598start_err:
599 return rval;
600}
601
602static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
603{
604 struct iscsi_conn *conn = cls_conn->dd_data;
605 struct qedi_conn *qedi_conn = conn->dd_data;
606 struct Scsi_Host *shost;
607 struct qedi_ctx *qedi;
608
609 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
610 qedi = iscsi_host_priv(shost);
611
612 qedi_conn_free_login_resources(qedi, qedi_conn);
613 iscsi_conn_teardown(cls_conn);
614}
615
616static int qedi_ep_get_param(struct iscsi_endpoint *ep,
617 enum iscsi_param param, char *buf)
618{
619 struct qedi_endpoint *qedi_ep = ep->dd_data;
620 int len;
621
622 if (!qedi_ep)
623 return -ENOTCONN;
624
625 switch (param) {
626 case ISCSI_PARAM_CONN_PORT:
627 len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
628 break;
629 case ISCSI_PARAM_CONN_ADDRESS:
630 if (qedi_ep->ip_type == TCP_IPV4)
631 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
632 else
633 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
634 break;
635 default:
636 return -ENOTCONN;
637 }
638
639 return len;
640}
641
642static int qedi_host_get_param(struct Scsi_Host *shost,
643 enum iscsi_host_param param, char *buf)
644{
645 struct qedi_ctx *qedi;
646 int len;
647
648 qedi = iscsi_host_priv(shost);
649
650 switch (param) {
651 case ISCSI_HOST_PARAM_HWADDRESS:
652 len = sysfs_format_mac(buf, qedi->mac, 6);
653 break;
654 case ISCSI_HOST_PARAM_NETDEV_NAME:
655 len = sprintf(buf, "host%d\n", shost->host_no);
656 break;
657 case ISCSI_HOST_PARAM_IPADDRESS:
658 if (qedi->ip_type == TCP_IPV4)
659 len = sprintf(buf, "%pI4\n", qedi->src_ip);
660 else
661 len = sprintf(buf, "%pI6\n", qedi->src_ip);
662 break;
663 default:
664 return iscsi_host_get_param(shost, param, buf);
665 }
666
667 return len;
668}
669
670static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
671 struct iscsi_stats *stats)
672{
673 struct iscsi_conn *conn = cls_conn->dd_data;
674 struct qed_iscsi_stats iscsi_stats;
675 struct Scsi_Host *shost;
676 struct qedi_ctx *qedi;
677
678 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
679 qedi = iscsi_host_priv(shost);
680 qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
681
682 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
683 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
684 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
685 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
686 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
687
688 stats->txdata_octets = conn->txdata_octets;
689 stats->rxdata_octets = conn->rxdata_octets;
690 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
691 stats->dataout_pdus = conn->dataout_pdus_cnt;
692 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
693 stats->datain_pdus = conn->datain_pdus_cnt;
694 stats->r2t_pdus = conn->r2t_pdus_cnt;
695 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
696 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
697 stats->digest_err = 0;
698 stats->timeout_err = 0;
699 strcpy(stats->custom[0].desc, "eh_abort_cnt");
700 stats->custom[0].value = conn->eh_abort_cnt;
701 stats->custom_length = 1;
702}
703
704static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
705{
706 struct scsi_sge *bd_tbl;
707
708 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
709
710 bd_tbl->sge_addr.hi =
711 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
712 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
713 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
714 qedi_conn->gen_pdu.req_buf;
715 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
716 bd_tbl->sge_addr.hi =
717 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
718 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
719 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
720}
721
722static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
723{
724 struct qedi_cmd *cmd = task->dd_data;
725 struct qedi_conn *qedi_conn = cmd->conn;
726 char *buf;
727 int data_len;
728 int rc = 0;
729
730 qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
731 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
732 case ISCSI_OP_LOGIN:
733 qedi_send_iscsi_login(qedi_conn, task);
734 break;
735 case ISCSI_OP_NOOP_OUT:
736 data_len = qedi_conn->gen_pdu.req_buf_size;
737 buf = qedi_conn->gen_pdu.req_buf;
738 if (data_len)
739 rc = qedi_send_iscsi_nopout(qedi_conn, task,
740 buf, data_len, 1);
741 else
742 rc = qedi_send_iscsi_nopout(qedi_conn, task,
743 NULL, 0, 1);
744 break;
745 case ISCSI_OP_LOGOUT:
746 rc = qedi_send_iscsi_logout(qedi_conn, task);
747 break;
748 case ISCSI_OP_SCSI_TMFUNC:
749 rc = qedi_iscsi_abort_work(qedi_conn, task);
750 break;
751 case ISCSI_OP_TEXT:
752 rc = qedi_send_iscsi_text(qedi_conn, task);
753 break;
754 default:
755 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
756 "unsupported op 0x%x\n", task->hdr->opcode);
757 }
758
759 return rc;
760}
761
762static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
763{
764 struct qedi_conn *qedi_conn = conn->dd_data;
765 struct qedi_cmd *cmd = task->dd_data;
766
767 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
768
769 qedi_conn->gen_pdu.req_buf_size = task->data_count;
770
771 if (task->data_count) {
772 memcpy(qedi_conn->gen_pdu.req_buf, task->data,
773 task->data_count);
774 qedi_conn->gen_pdu.req_wr_ptr =
775 qedi_conn->gen_pdu.req_buf + task->data_count;
776 }
777
778 cmd->conn = conn->dd_data;
779 cmd->scsi_cmd = NULL;
780 return qedi_iscsi_send_generic_request(task);
781}
782
783static int qedi_task_xmit(struct iscsi_task *task)
784{
785 struct iscsi_conn *conn = task->conn;
786 struct qedi_conn *qedi_conn = conn->dd_data;
787 struct qedi_cmd *cmd = task->dd_data;
788 struct scsi_cmnd *sc = task->sc;
789
790 if (test_bit(QEDI_IN_SHUTDOWN, &qedi_conn->qedi->flags))
791 return -ENODEV;
792
793 cmd->state = 0;
794 cmd->task = NULL;
795 cmd->use_slowpath = false;
796 cmd->conn = qedi_conn;
797 cmd->task = task;
798 cmd->io_cmd_in_list = false;
799 INIT_LIST_HEAD(&cmd->io_cmd);
800
801 if (!sc)
802 return qedi_mtask_xmit(conn, task);
803
804 cmd->scsi_cmd = sc;
805 return qedi_iscsi_send_ioreq(task);
806}
807
808static struct iscsi_endpoint *
809qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
810 int non_blocking)
811{
812 struct qedi_ctx *qedi;
813 struct iscsi_endpoint *ep;
814 struct qedi_endpoint *qedi_ep;
815 struct sockaddr_in *addr;
816 struct sockaddr_in6 *addr6;
817 struct iscsi_path path_req;
818 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
819 u32 iscsi_cid = QEDI_CID_RESERVED;
820 u16 len = 0;
821 char *buf = NULL;
822 int ret, tmp;
823
824 if (!shost) {
825 ret = -ENXIO;
826 QEDI_ERR(NULL, "shost is NULL\n");
827 return ERR_PTR(ret);
828 }
829
830 if (qedi_do_not_recover) {
831 ret = -ENOMEM;
832 return ERR_PTR(ret);
833 }
834
835 qedi = iscsi_host_priv(shost);
836
837 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
838 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
839 ret = -ENOMEM;
840 return ERR_PTR(ret);
841 }
842
843 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
844 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
845 return ERR_PTR(-ENXIO);
846 }
847
848 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
849 if (!ep) {
850 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
851 ret = -ENOMEM;
852 return ERR_PTR(ret);
853 }
854 qedi_ep = ep->dd_data;
855 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
856 qedi_ep->state = EP_STATE_IDLE;
857 qedi_ep->iscsi_cid = (u32)-1;
858 qedi_ep->qedi = qedi;
859
860 if (dst_addr->sa_family == AF_INET) {
861 addr = (struct sockaddr_in *)dst_addr;
862 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
863 sizeof(struct in_addr));
864 qedi_ep->dst_port = ntohs(addr->sin_port);
865 qedi_ep->ip_type = TCP_IPV4;
866 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
867 "dst_addr=%pI4, dst_port=%u\n",
868 qedi_ep->dst_addr, qedi_ep->dst_port);
869 } else if (dst_addr->sa_family == AF_INET6) {
870 addr6 = (struct sockaddr_in6 *)dst_addr;
871 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
872 sizeof(struct in6_addr));
873 qedi_ep->dst_port = ntohs(addr6->sin6_port);
874 qedi_ep->ip_type = TCP_IPV6;
875 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
876 "dst_addr=%pI6, dst_port=%u\n",
877 qedi_ep->dst_addr, qedi_ep->dst_port);
878 } else {
879 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
880 }
881
882 ret = qedi_alloc_sq(qedi, qedi_ep);
883 if (ret)
884 goto ep_conn_exit;
885
886 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
887 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
888
889 if (ret) {
890 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
891 ret = -ENXIO;
892 goto ep_free_sq;
893 }
894
895 iscsi_cid = qedi_ep->handle;
896 qedi_ep->iscsi_cid = iscsi_cid;
897
898 init_waitqueue_head(&qedi_ep->ofld_wait);
899 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
900 qedi_ep->state = EP_STATE_OFLDCONN_START;
901 qedi->ep_tbl[iscsi_cid] = qedi_ep;
902
903 buf = (char *)&path_req;
904 len = sizeof(path_req);
905 memset(&path_req, 0, len);
906
907 msg_type = ISCSI_KEVENT_PATH_REQ;
908 path_req.handle = (u64)qedi_ep->iscsi_cid;
909 path_req.pmtu = qedi->ll2_mtu;
910 qedi_ep->pmtu = qedi->ll2_mtu;
911 if (qedi_ep->ip_type == TCP_IPV4) {
912 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
913 sizeof(struct in_addr));
914 path_req.ip_addr_len = 4;
915 } else {
916 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
917 sizeof(struct in6_addr));
918 path_req.ip_addr_len = 16;
919 }
920
921 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
922 len);
923 if (ret) {
924 QEDI_ERR(&qedi->dbg_ctx,
925 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
926 iscsi_cid, ret);
927 goto ep_rel_conn;
928 }
929
930 atomic_inc(&qedi->num_offloads);
931 return ep;
932
933ep_rel_conn:
934 qedi->ep_tbl[iscsi_cid] = NULL;
935 tmp = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
936 if (tmp)
937 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
938 tmp);
939ep_free_sq:
940 qedi_free_sq(qedi, qedi_ep);
941ep_conn_exit:
942 iscsi_destroy_endpoint(ep);
943 return ERR_PTR(ret);
944}
945
946static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
947{
948 struct qedi_endpoint *qedi_ep;
949 int ret = 0;
950
951 if (qedi_do_not_recover)
952 return 1;
953
954 qedi_ep = ep->dd_data;
955 if (qedi_ep->state == EP_STATE_IDLE ||
956 qedi_ep->state == EP_STATE_OFLDCONN_NONE ||
957 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
958 return -1;
959
960 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
961 ret = 1;
962
963 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
964 QEDI_OFLD_WAIT_STATE(qedi_ep),
965 msecs_to_jiffies(timeout_ms));
966
967 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
968 ret = -1;
969
970 if (ret > 0)
971 return 1;
972 else if (!ret)
973 return 0;
974 else
975 return ret;
976}
977
978static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
979{
980 struct qedi_cmd *cmd, *cmd_tmp;
981
982 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
983 io_cmd) {
984 list_del_init(&cmd->io_cmd);
985 qedi_conn->active_cmd_count--;
986 }
987}
988
989static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
990{
991 struct qedi_endpoint *qedi_ep;
992 struct qedi_conn *qedi_conn = NULL;
993 struct iscsi_conn *conn = NULL;
994 struct qedi_ctx *qedi;
995 int ret = 0;
996 int wait_delay;
997 int abrt_conn = 0;
998 int count = 10;
999
1000 wait_delay = 60 * HZ + DEF_MAX_RT_TIME;
1001 qedi_ep = ep->dd_data;
1002 qedi = qedi_ep->qedi;
1003
1004 if (qedi_ep->state == EP_STATE_OFLDCONN_START)
1005 goto ep_exit_recover;
1006
1007 if (qedi_ep->state != EP_STATE_OFLDCONN_NONE)
1008 flush_work(&qedi_ep->offload_work);
1009
1010 if (qedi_ep->conn) {
1011 qedi_conn = qedi_ep->conn;
1012 conn = qedi_conn->cls_conn->dd_data;
1013 iscsi_suspend_queue(conn);
1014 abrt_conn = qedi_conn->abrt_conn;
1015
1016 while (count--) {
1017 if (!test_bit(QEDI_CONN_FW_CLEANUP,
1018 &qedi_conn->flags)) {
1019 break;
1020 }
1021 msleep(1000);
1022 }
1023
1024 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
1025 if (qedi_do_not_recover) {
1026 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1027 "Do not recover cid=0x%x\n",
1028 qedi_ep->iscsi_cid);
1029 goto ep_exit_recover;
1030 }
1031 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1032 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
1033 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
1034 qedi_cleanup_active_cmd_list(qedi_conn);
1035 goto ep_release_conn;
1036 }
1037 }
1038
1039 if (qedi_do_not_recover)
1040 goto ep_exit_recover;
1041
1042 switch (qedi_ep->state) {
1043 case EP_STATE_OFLDCONN_START:
1044 case EP_STATE_OFLDCONN_NONE:
1045 goto ep_release_conn;
1046 case EP_STATE_OFLDCONN_FAILED:
1047 break;
1048 case EP_STATE_OFLDCONN_COMPL:
1049 if (unlikely(!qedi_conn))
1050 break;
1051
1052 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1053 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1054 qedi_conn->active_cmd_count, abrt_conn,
1055 qedi_ep->state,
1056 qedi_ep->iscsi_cid,
1057 qedi_ep->conn
1058 );
1059
1060 if (!qedi_conn->active_cmd_count)
1061 abrt_conn = 0;
1062 else
1063 abrt_conn = 1;
1064
1065 if (abrt_conn)
1066 qedi_clearsq(qedi, qedi_conn, NULL);
1067 break;
1068 default:
1069 break;
1070 }
1071
1072 if (!abrt_conn)
1073 wait_delay += qedi->pf_params.iscsi_pf_params.two_msl_timer;
1074
1075 qedi_ep->state = EP_STATE_DISCONN_START;
1076 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1077 if (ret) {
1078 QEDI_WARN(&qedi->dbg_ctx,
1079 "destroy_conn failed returned %d\n", ret);
1080 } else {
1081 ret = wait_event_interruptible_timeout(
1082 qedi_ep->tcp_ofld_wait,
1083 (qedi_ep->state !=
1084 EP_STATE_DISCONN_START),
1085 wait_delay);
1086 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1087 QEDI_WARN(&qedi->dbg_ctx,
1088 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1089 ret, wait_delay, qedi_ep->iscsi_cid);
1090 }
1091 }
1092
1093ep_release_conn:
1094 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1095 if (ret)
1096 QEDI_WARN(&qedi->dbg_ctx,
1097 "release_conn returned %d, cid=0x%x\n",
1098 ret, qedi_ep->iscsi_cid);
1099ep_exit_recover:
1100 qedi_ep->state = EP_STATE_IDLE;
1101 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1102 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1103 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1104 qedi_free_sq(qedi, qedi_ep);
1105
1106 if (qedi_conn)
1107 qedi_conn->ep = NULL;
1108
1109 qedi_ep->conn = NULL;
1110 qedi_ep->qedi = NULL;
1111 atomic_dec(&qedi->num_offloads);
1112
1113 iscsi_destroy_endpoint(ep);
1114}
1115
1116static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1117{
1118 struct qed_dev *cdev = qedi->cdev;
1119 struct qedi_uio_dev *udev;
1120 struct qedi_uio_ctrl *uctrl;
1121 struct sk_buff *skb;
1122 u32 len;
1123 int rc = 0;
1124
1125 udev = qedi->udev;
1126 if (!udev) {
1127 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1128 return -EINVAL;
1129 }
1130
1131 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1132 if (!uctrl) {
1133 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1134 return -EINVAL;
1135 }
1136
1137 len = uctrl->host_tx_pkt_len;
1138 if (!len) {
1139 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1140 return -EINVAL;
1141 }
1142
1143 skb = alloc_skb(len, GFP_ATOMIC);
1144 if (!skb) {
1145 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1146 return -EINVAL;
1147 }
1148
1149 skb_put(skb, len);
1150 memcpy(skb->data, udev->tx_pkt, len);
1151 skb->ip_summed = CHECKSUM_NONE;
1152
1153 if (vlanid)
1154 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1155
1156 rc = qedi_ops->ll2->start_xmit(cdev, skb, 0);
1157 if (rc) {
1158 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1159 rc);
1160 kfree_skb(skb);
1161 }
1162
1163 uctrl->host_tx_pkt_len = 0;
1164 uctrl->hw_tx_cons++;
1165
1166 return rc;
1167}
1168
1169static void qedi_offload_work(struct work_struct *work)
1170{
1171 struct qedi_endpoint *qedi_ep =
1172 container_of(work, struct qedi_endpoint, offload_work);
1173 struct qedi_ctx *qedi;
1174 int wait_delay = 5 * HZ;
1175 int ret;
1176
1177 qedi = qedi_ep->qedi;
1178
1179 ret = qedi_iscsi_offload_conn(qedi_ep);
1180 if (ret) {
1181 QEDI_ERR(&qedi->dbg_ctx,
1182 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1183 qedi_ep->iscsi_cid, qedi_ep, ret);
1184 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1185 return;
1186 }
1187
1188 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1189 (qedi_ep->state ==
1190 EP_STATE_OFLDCONN_COMPL),
1191 wait_delay);
1192 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1193 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1194 QEDI_ERR(&qedi->dbg_ctx,
1195 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1196 qedi_ep->iscsi_cid, qedi_ep);
1197 }
1198}
1199
1200static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1201{
1202 struct qedi_ctx *qedi;
1203 struct qedi_endpoint *qedi_ep;
1204 int ret = 0;
1205 u32 iscsi_cid;
1206 u16 port_id = 0;
1207
1208 if (!shost) {
1209 ret = -ENXIO;
1210 QEDI_ERR(NULL, "shost is NULL\n");
1211 return ret;
1212 }
1213
1214 if (strcmp(shost->hostt->proc_name, "qedi")) {
1215 ret = -ENXIO;
1216 QEDI_ERR(NULL, "shost %s is invalid\n",
1217 shost->hostt->proc_name);
1218 return ret;
1219 }
1220
1221 qedi = iscsi_host_priv(shost);
1222 if (path_data->handle == QEDI_PATH_HANDLE) {
1223 ret = qedi_data_avail(qedi, path_data->vlan_id);
1224 goto set_path_exit;
1225 }
1226
1227 iscsi_cid = (u32)path_data->handle;
1228 qedi_ep = qedi->ep_tbl[iscsi_cid];
1229 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1230 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
1231 if (!qedi_ep) {
1232 ret = -EINVAL;
1233 goto set_path_exit;
1234 }
1235
1236 if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
1237 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
1238 qedi_ep->state = EP_STATE_OFLDCONN_NONE;
1239 ret = -EIO;
1240 goto set_path_exit;
1241 }
1242
1243 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
1244 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
1245
1246 qedi_ep->vlan_id = path_data->vlan_id;
1247 if (path_data->pmtu < DEF_PATH_MTU) {
1248 qedi_ep->pmtu = qedi->ll2_mtu;
1249 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1250 "MTU cannot be %u, using default MTU %u\n",
1251 path_data->pmtu, qedi_ep->pmtu);
1252 }
1253
1254 if (path_data->pmtu != qedi->ll2_mtu) {
1255 if (path_data->pmtu > JUMBO_MTU) {
1256 ret = -EINVAL;
1257 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
1258 goto set_path_exit;
1259 }
1260
1261 qedi_reset_host_mtu(qedi, path_data->pmtu);
1262 qedi_ep->pmtu = qedi->ll2_mtu;
1263 }
1264
1265 port_id = qedi_ep->src_port;
1266 if (port_id >= QEDI_LOCAL_PORT_MIN &&
1267 port_id < QEDI_LOCAL_PORT_MAX) {
1268 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
1269 port_id = 0;
1270 } else {
1271 port_id = 0;
1272 }
1273
1274 if (!port_id) {
1275 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
1276 if (port_id == QEDI_LOCAL_PORT_INVALID) {
1277 QEDI_ERR(&qedi->dbg_ctx,
1278 "Failed to allocate port id for iscsi_cid=0x%x\n",
1279 iscsi_cid);
1280 ret = -ENOMEM;
1281 goto set_path_exit;
1282 }
1283 }
1284
1285 qedi_ep->src_port = port_id;
1286
1287 if (qedi_ep->ip_type == TCP_IPV4) {
1288 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
1289 sizeof(struct in_addr));
1290 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
1291 sizeof(struct in_addr));
1292 qedi->ip_type = TCP_IPV4;
1293
1294 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1295 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
1296 qedi_ep->src_addr, qedi_ep->src_port,
1297 qedi_ep->dst_addr, qedi_ep->dst_port);
1298 } else {
1299 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
1300 sizeof(struct in6_addr));
1301 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
1302 sizeof(struct in6_addr));
1303 qedi->ip_type = TCP_IPV6;
1304
1305 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1306 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
1307 qedi_ep->src_addr, qedi_ep->src_port,
1308 qedi_ep->dst_addr, qedi_ep->dst_port);
1309 }
1310
1311 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
1312 queue_work(qedi->offload_thread, &qedi_ep->offload_work);
1313
1314 ret = 0;
1315
1316set_path_exit:
1317 return ret;
1318}
1319
1320static umode_t qedi_attr_is_visible(int param_type, int param)
1321{
1322 switch (param_type) {
1323 case ISCSI_HOST_PARAM:
1324 switch (param) {
1325 case ISCSI_HOST_PARAM_NETDEV_NAME:
1326 case ISCSI_HOST_PARAM_HWADDRESS:
1327 case ISCSI_HOST_PARAM_IPADDRESS:
1328 return 0444;
1329 default:
1330 return 0;
1331 }
1332 case ISCSI_PARAM:
1333 switch (param) {
1334 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1335 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1336 case ISCSI_PARAM_HDRDGST_EN:
1337 case ISCSI_PARAM_DATADGST_EN:
1338 case ISCSI_PARAM_CONN_ADDRESS:
1339 case ISCSI_PARAM_CONN_PORT:
1340 case ISCSI_PARAM_EXP_STATSN:
1341 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1342 case ISCSI_PARAM_PERSISTENT_PORT:
1343 case ISCSI_PARAM_PING_TMO:
1344 case ISCSI_PARAM_RECV_TMO:
1345 case ISCSI_PARAM_INITIAL_R2T_EN:
1346 case ISCSI_PARAM_MAX_R2T:
1347 case ISCSI_PARAM_IMM_DATA_EN:
1348 case ISCSI_PARAM_FIRST_BURST:
1349 case ISCSI_PARAM_MAX_BURST:
1350 case ISCSI_PARAM_PDU_INORDER_EN:
1351 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1352 case ISCSI_PARAM_ERL:
1353 case ISCSI_PARAM_TARGET_NAME:
1354 case ISCSI_PARAM_TPGT:
1355 case ISCSI_PARAM_USERNAME:
1356 case ISCSI_PARAM_PASSWORD:
1357 case ISCSI_PARAM_USERNAME_IN:
1358 case ISCSI_PARAM_PASSWORD_IN:
1359 case ISCSI_PARAM_FAST_ABORT:
1360 case ISCSI_PARAM_ABORT_TMO:
1361 case ISCSI_PARAM_LU_RESET_TMO:
1362 case ISCSI_PARAM_TGT_RESET_TMO:
1363 case ISCSI_PARAM_IFACE_NAME:
1364 case ISCSI_PARAM_INITIATOR_NAME:
1365 case ISCSI_PARAM_BOOT_ROOT:
1366 case ISCSI_PARAM_BOOT_NIC:
1367 case ISCSI_PARAM_BOOT_TARGET:
1368 return 0444;
1369 default:
1370 return 0;
1371 }
1372 }
1373
1374 return 0;
1375}
1376
1377static void qedi_cleanup_task(struct iscsi_task *task)
1378{
1379 if (!task->sc || task->state == ISCSI_TASK_PENDING) {
1380 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
1381 refcount_read(&task->refcount));
1382 return;
1383 }
1384
1385 qedi_iscsi_unmap_sg_list(task->dd_data);
1386}
1387
1388struct iscsi_transport qedi_iscsi_transport = {
1389 .owner = THIS_MODULE,
1390 .name = QEDI_MODULE_NAME,
1391 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
1392 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
1393 .create_session = qedi_session_create,
1394 .destroy_session = qedi_session_destroy,
1395 .create_conn = qedi_conn_create,
1396 .bind_conn = qedi_conn_bind,
1397 .start_conn = qedi_conn_start,
1398 .stop_conn = iscsi_conn_stop,
1399 .destroy_conn = qedi_conn_destroy,
1400 .set_param = iscsi_set_param,
1401 .get_ep_param = qedi_ep_get_param,
1402 .get_conn_param = iscsi_conn_get_param,
1403 .get_session_param = iscsi_session_get_param,
1404 .get_host_param = qedi_host_get_param,
1405 .send_pdu = iscsi_conn_send_pdu,
1406 .get_stats = qedi_conn_get_stats,
1407 .xmit_task = qedi_task_xmit,
1408 .cleanup_task = qedi_cleanup_task,
1409 .session_recovery_timedout = iscsi_session_recovery_timedout,
1410 .ep_connect = qedi_ep_connect,
1411 .ep_poll = qedi_ep_poll,
1412 .ep_disconnect = qedi_ep_disconnect,
1413 .set_path = qedi_set_path,
1414 .attr_is_visible = qedi_attr_is_visible,
1415};
1416
1417void qedi_start_conn_recovery(struct qedi_ctx *qedi,
1418 struct qedi_conn *qedi_conn)
1419{
1420 struct iscsi_cls_session *cls_sess;
1421 struct iscsi_cls_conn *cls_conn;
1422 struct iscsi_conn *conn;
1423
1424 cls_conn = qedi_conn->cls_conn;
1425 conn = cls_conn->dd_data;
1426 cls_sess = iscsi_conn_to_session(cls_conn);
1427
1428 if (iscsi_is_session_online(cls_sess)) {
1429 qedi_conn->abrt_conn = 1;
1430 QEDI_ERR(&qedi->dbg_ctx,
1431 "Failing connection, state=0x%x, cid=0x%x\n",
1432 conn->session->state, qedi_conn->iscsi_conn_id);
1433 iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
1434 ISCSI_ERR_CONN_FAILED);
1435 }
1436}
1437
1438static const struct {
1439 enum iscsi_error_types error_code;
1440 char *err_string;
1441} qedi_iscsi_error[] = {
1442 { ISCSI_STATUS_NONE,
1443 "tcp_error none"
1444 },
1445 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
1446 "task cid mismatch"
1447 },
1448 { ISCSI_CONN_ERROR_TASK_NOT_VALID,
1449 "invalid task"
1450 },
1451 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
1452 "rq ring full"
1453 },
1454 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
1455 "cmdq ring full"
1456 },
1457 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
1458 "sge caching failed"
1459 },
1460 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
1461 "hdr digest error"
1462 },
1463 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
1464 "local cmpl error"
1465 },
1466 { ISCSI_CONN_ERROR_DATA_OVERRUN,
1467 "invalid task"
1468 },
1469 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
1470 "out of sge error"
1471 },
1472 { ISCSI_CONN_ERROR_TCP_IP_FRAGMENT_ERROR,
1473 "tcp ip fragment error"
1474 },
1475 { ISCSI_CONN_ERROR_PROTOCOL_ERR_AHS_LEN,
1476 "AHS len protocol error"
1477 },
1478 { ISCSI_CONN_ERROR_PROTOCOL_ERR_ITT_OUT_OF_RANGE,
1479 "itt out of range error"
1480 },
1481 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_EXCEEDS_PDU_SIZE,
1482 "data seg more than pdu size"
1483 },
1484 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE,
1485 "invalid opcode"
1486 },
1487 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_OPCODE_BEFORE_UPDATE,
1488 "invalid opcode before update"
1489 },
1490 { ISCSI_CONN_ERROR_UNVALID_NOPIN_DSL,
1491 "unexpected opcode"
1492 },
1493 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_CARRIES_NO_DATA,
1494 "r2t carries no data"
1495 },
1496 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SN,
1497 "data sn error"
1498 },
1499 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_IN_TTT,
1500 "data TTT error"
1501 },
1502 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_TTT,
1503 "r2t TTT error"
1504 },
1505 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_BUFFER_OFFSET,
1506 "buffer offset error"
1507 },
1508 { ISCSI_CONN_ERROR_PROTOCOL_ERR_BUFFER_OFFSET_OOO,
1509 "buffer offset ooo"
1510 },
1511 { ISCSI_CONN_ERROR_PROTOCOL_ERR_R2T_SN,
1512 "data seg len 0"
1513 },
1514 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_0,
1515 "data xer len error"
1516 },
1517 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_1,
1518 "data xer len1 error"
1519 },
1520 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DESIRED_DATA_TRNS_LEN_2,
1521 "data xer len2 error"
1522 },
1523 { ISCSI_CONN_ERROR_PROTOCOL_ERR_LUN,
1524 "protocol lun error"
1525 },
1526 { ISCSI_CONN_ERROR_PROTOCOL_ERR_F_BIT_ZERO,
1527 "f bit zero error"
1528 },
1529 { ISCSI_CONN_ERROR_PROTOCOL_ERR_EXP_STAT_SN,
1530 "exp stat sn error"
1531 },
1532 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DSL_NOT_ZERO,
1533 "dsl not zero error"
1534 },
1535 { ISCSI_CONN_ERROR_PROTOCOL_ERR_INVALID_DSL,
1536 "invalid dsl"
1537 },
1538 { ISCSI_CONN_ERROR_PROTOCOL_ERR_DATA_SEG_LEN_TOO_BIG,
1539 "data seg len too big"
1540 },
1541 { ISCSI_CONN_ERROR_PROTOCOL_ERR_OUTSTANDING_R2T_COUNT,
1542 "outstanding r2t count error"
1543 },
1544 { ISCSI_CONN_ERROR_SENSE_DATA_LENGTH,
1545 "sense datalen error"
1546 },
1547};
1548
1549char *qedi_get_iscsi_error(enum iscsi_error_types err_code)
1550{
1551 int i;
1552 char *msg = NULL;
1553
1554 for (i = 0; i < ARRAY_SIZE(qedi_iscsi_error); i++) {
1555 if (qedi_iscsi_error[i].error_code == err_code) {
1556 msg = qedi_iscsi_error[i].err_string;
1557 break;
1558 }
1559 }
1560 return msg;
1561}
1562
1563void qedi_process_iscsi_error(struct qedi_endpoint *ep,
1564 struct iscsi_eqe_data *data)
1565{
1566 struct qedi_conn *qedi_conn;
1567 struct qedi_ctx *qedi;
1568 char warn_notice[] = "iscsi_warning";
1569 char error_notice[] = "iscsi_error";
1570 char unknown_msg[] = "Unknown error";
1571 char *message;
1572 int need_recovery = 0;
1573 u32 err_mask = 0;
1574 char *msg;
1575
1576 if (!ep)
1577 return;
1578
1579 qedi_conn = ep->conn;
1580 if (!qedi_conn)
1581 return;
1582
1583 qedi = ep->qedi;
1584
1585 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
1586 data->error_code);
1587
1588 if (err_mask) {
1589 need_recovery = 0;
1590 message = warn_notice;
1591 } else {
1592 need_recovery = 1;
1593 message = error_notice;
1594 }
1595
1596 msg = qedi_get_iscsi_error(data->error_code);
1597 if (!msg) {
1598 need_recovery = 0;
1599 msg = unknown_msg;
1600 }
1601
1602 iscsi_conn_printk(KERN_ALERT,
1603 qedi_conn->cls_conn->dd_data,
1604 "qedi: %s - %s\n", message, msg);
1605
1606 if (need_recovery)
1607 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1608}
1609
1610void qedi_clear_session_ctx(struct iscsi_cls_session *cls_sess)
1611{
1612 struct iscsi_session *session = cls_sess->dd_data;
1613 struct iscsi_conn *conn = session->leadconn;
1614 struct qedi_conn *qedi_conn = conn->dd_data;
1615
1616 if (iscsi_is_session_online(cls_sess))
1617 qedi_ep_disconnect(qedi_conn->iscsi_ep);
1618
1619 qedi_conn_destroy(qedi_conn->cls_conn);
1620
1621 qedi_session_destroy(cls_sess);
1622}
1623
1624void qedi_process_tcp_error(struct qedi_endpoint *ep,
1625 struct iscsi_eqe_data *data)
1626{
1627 struct qedi_conn *qedi_conn;
1628
1629 if (!ep)
1630 return;
1631
1632 qedi_conn = ep->conn;
1633 if (!qedi_conn)
1634 return;
1635
1636 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
1637 data->error_code);
1638
1639 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1640}
1641
