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[mirror_ubuntu-eoan-kernel.git] / drivers / scsi / qedi / qedi_iscsi.c
CommitLineData
ace7f46b
MR		 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
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_abort_handler = iscsi_eh_abort,
52 .eh_device_reset_handler = iscsi_eh_device_reset,
53 .eh_target_reset_handler = iscsi_eh_recover_target,
54 .eh_host_reset_handler = qedi_eh_host_reset,
55 .target_alloc = iscsi_target_alloc,
56 .change_queue_depth = scsi_change_queue_depth,
57 .can_queue = QEDI_MAX_ISCSI_TASK,
58 .this_id = -1,
59 .sg_tablesize = QEDI_ISCSI_MAX_BDS_PER_CMD,
60 .max_sectors = 0xffff,
61 .cmd_per_lun = 128,
62 .use_clustering = ENABLE_CLUSTERING,
63 .shost_attrs = qedi_shost_attrs,
64};
65
66static void qedi_conn_free_login_resources(struct qedi_ctx *qedi,
67 struct qedi_conn *qedi_conn)
68{
69 if (qedi_conn->gen_pdu.resp_bd_tbl) {
70 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
71 qedi_conn->gen_pdu.resp_bd_tbl,
72 qedi_conn->gen_pdu.resp_bd_dma);
73 qedi_conn->gen_pdu.resp_bd_tbl = NULL;
74 }
75
76 if (qedi_conn->gen_pdu.req_bd_tbl) {
77 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
78 qedi_conn->gen_pdu.req_bd_tbl,
79 qedi_conn->gen_pdu.req_bd_dma);
80 qedi_conn->gen_pdu.req_bd_tbl = NULL;
81 }
82
83 if (qedi_conn->gen_pdu.resp_buf) {
84 dma_free_coherent(&qedi->pdev->dev,
85 ISCSI_DEF_MAX_RECV_SEG_LEN,
86 qedi_conn->gen_pdu.resp_buf,
87 qedi_conn->gen_pdu.resp_dma_addr);
88 qedi_conn->gen_pdu.resp_buf = NULL;
89 }
90
91 if (qedi_conn->gen_pdu.req_buf) {
92 dma_free_coherent(&qedi->pdev->dev,
93 ISCSI_DEF_MAX_RECV_SEG_LEN,
94 qedi_conn->gen_pdu.req_buf,
95 qedi_conn->gen_pdu.req_dma_addr);
96 qedi_conn->gen_pdu.req_buf = NULL;
97 }
98}
99
100static int qedi_conn_alloc_login_resources(struct qedi_ctx *qedi,
101 struct qedi_conn *qedi_conn)
102{
103 qedi_conn->gen_pdu.req_buf =
104 dma_alloc_coherent(&qedi->pdev->dev,
105 ISCSI_DEF_MAX_RECV_SEG_LEN,
106 &qedi_conn->gen_pdu.req_dma_addr,
107 GFP_KERNEL);
108 if (!qedi_conn->gen_pdu.req_buf)
109 goto login_req_buf_failure;
110
111 qedi_conn->gen_pdu.req_buf_size = 0;
112 qedi_conn->gen_pdu.req_wr_ptr = qedi_conn->gen_pdu.req_buf;
113
114 qedi_conn->gen_pdu.resp_buf =
115 dma_alloc_coherent(&qedi->pdev->dev,
116 ISCSI_DEF_MAX_RECV_SEG_LEN,
117 &qedi_conn->gen_pdu.resp_dma_addr,
118 GFP_KERNEL);
119 if (!qedi_conn->gen_pdu.resp_buf)
120 goto login_resp_buf_failure;
121
122 qedi_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
123 qedi_conn->gen_pdu.resp_wr_ptr = qedi_conn->gen_pdu.resp_buf;
124
125 qedi_conn->gen_pdu.req_bd_tbl =
126 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
127 &qedi_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
128 if (!qedi_conn->gen_pdu.req_bd_tbl)
129 goto login_req_bd_tbl_failure;
130
131 qedi_conn->gen_pdu.resp_bd_tbl =
132 dma_alloc_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
133 &qedi_conn->gen_pdu.resp_bd_dma,
134 GFP_KERNEL);
135 if (!qedi_conn->gen_pdu.resp_bd_tbl)
136 goto login_resp_bd_tbl_failure;
137
138 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_SESS,
139 "Allocation successful, cid=0x%x\n",
140 qedi_conn->iscsi_conn_id);
141 return 0;
142
143login_resp_bd_tbl_failure:
144 dma_free_coherent(&qedi->pdev->dev, QEDI_PAGE_SIZE,
145 qedi_conn->gen_pdu.req_bd_tbl,
146 qedi_conn->gen_pdu.req_bd_dma);
147 qedi_conn->gen_pdu.req_bd_tbl = NULL;
148
149login_req_bd_tbl_failure:
150 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
151 qedi_conn->gen_pdu.resp_buf,
152 qedi_conn->gen_pdu.resp_dma_addr);
153 qedi_conn->gen_pdu.resp_buf = NULL;
154login_resp_buf_failure:
155 dma_free_coherent(&qedi->pdev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
156 qedi_conn->gen_pdu.req_buf,
157 qedi_conn->gen_pdu.req_dma_addr);
158 qedi_conn->gen_pdu.req_buf = NULL;
159login_req_buf_failure:
160 iscsi_conn_printk(KERN_ERR, qedi_conn->cls_conn->dd_data,
161 "login resource alloc failed!!\n");
162 return -ENOMEM;
163}
164
165static void qedi_destroy_cmd_pool(struct qedi_ctx *qedi,
166 struct iscsi_session *session)
167{
168 int i;
169
170 for (i = 0; i < session->cmds_max; i++) {
171 struct iscsi_task *task = session->cmds[i];
172 struct qedi_cmd *cmd = task->dd_data;
173
174 if (cmd->io_tbl.sge_tbl)
175 dma_free_coherent(&qedi->pdev->dev,
176 QEDI_ISCSI_MAX_BDS_PER_CMD *
177 sizeof(struct iscsi_sge),
178 cmd->io_tbl.sge_tbl,
179 cmd->io_tbl.sge_tbl_dma);
180
181 if (cmd->sense_buffer)
182 dma_free_coherent(&qedi->pdev->dev,
183 SCSI_SENSE_BUFFERSIZE,
184 cmd->sense_buffer,
185 cmd->sense_buffer_dma);
186 }
187}
188
189static int qedi_alloc_sget(struct qedi_ctx *qedi, struct iscsi_session *session,
190 struct qedi_cmd *cmd)
191{
192 struct qedi_io_bdt *io = &cmd->io_tbl;
193 struct iscsi_sge *sge;
194
195 io->sge_tbl = dma_alloc_coherent(&qedi->pdev->dev,
196 QEDI_ISCSI_MAX_BDS_PER_CMD *
197 sizeof(*sge),
198 &io->sge_tbl_dma, GFP_KERNEL);
199 if (!io->sge_tbl) {
200 iscsi_session_printk(KERN_ERR, session,
201 "Could not allocate BD table.\n");
202 return -ENOMEM;
203 }
204
205 io->sge_valid = 0;
206 return 0;
207}
208
209static int qedi_setup_cmd_pool(struct qedi_ctx *qedi,
210 struct iscsi_session *session)
211{
212 int i;
213
214 for (i = 0; i < session->cmds_max; i++) {
215 struct iscsi_task *task = session->cmds[i];
216 struct qedi_cmd *cmd = task->dd_data;
217
218 task->hdr = &cmd->hdr;
219 task->hdr_max = sizeof(struct iscsi_hdr);
220
221 if (qedi_alloc_sget(qedi, session, cmd))
222 goto free_sgets;
223
224 cmd->sense_buffer = dma_alloc_coherent(&qedi->pdev->dev,
225 SCSI_SENSE_BUFFERSIZE,
226 &cmd->sense_buffer_dma,
227 GFP_KERNEL);
228 if (!cmd->sense_buffer)
229 goto free_sgets;
230 }
231
232 return 0;
233
234free_sgets:
235 qedi_destroy_cmd_pool(qedi, session);
236 return -ENOMEM;
237}
238
239static struct iscsi_cls_session *
240qedi_session_create(struct iscsi_endpoint *ep, u16 cmds_max,
241 u16 qdepth, uint32_t initial_cmdsn)
242{
243 struct Scsi_Host *shost;
244 struct iscsi_cls_session *cls_session;
245 struct qedi_ctx *qedi;
246 struct qedi_endpoint *qedi_ep;
247
248 if (!ep)
249 return NULL;
250
251 qedi_ep = ep->dd_data;
252 shost = qedi_ep->qedi->shost;
253 qedi = iscsi_host_priv(shost);
254
255 if (cmds_max > qedi->max_sqes)
256 cmds_max = qedi->max_sqes;
257 else if (cmds_max < QEDI_SQ_WQES_MIN)
258 cmds_max = QEDI_SQ_WQES_MIN;
259
260 cls_session = iscsi_session_setup(&qedi_iscsi_transport, shost,
261 cmds_max, 0, sizeof(struct qedi_cmd),
262 initial_cmdsn, ISCSI_MAX_TARGET);
263 if (!cls_session) {
264 QEDI_ERR(&qedi->dbg_ctx,
265 "Failed to setup session for ep=%p\n", qedi_ep);
266 return NULL;
267 }
268
269 if (qedi_setup_cmd_pool(qedi, cls_session->dd_data)) {
270 QEDI_ERR(&qedi->dbg_ctx,
271 "Failed to setup cmd pool for ep=%p\n", qedi_ep);
272 goto session_teardown;
273 }
274
275 return cls_session;
276
277session_teardown:
278 iscsi_session_teardown(cls_session);
279 return NULL;
280}
281
282static void qedi_session_destroy(struct iscsi_cls_session *cls_session)
283{
284 struct iscsi_session *session = cls_session->dd_data;
285 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
286 struct qedi_ctx *qedi = iscsi_host_priv(shost);
287
288 qedi_destroy_cmd_pool(qedi, session);
289 iscsi_session_teardown(cls_session);
290}
291
292static struct iscsi_cls_conn *
293qedi_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
294{
295 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
296 struct qedi_ctx *qedi = iscsi_host_priv(shost);
297 struct iscsi_cls_conn *cls_conn;
298 struct qedi_conn *qedi_conn;
299 struct iscsi_conn *conn;
300
301 cls_conn = iscsi_conn_setup(cls_session, sizeof(*qedi_conn),
302 cid);
303 if (!cls_conn) {
304 QEDI_ERR(&qedi->dbg_ctx,
305 "conn_new: iscsi conn setup failed, cid=0x%x, cls_sess=%p!\n",
306 cid, cls_session);
307 return NULL;
308 }
309
310 conn = cls_conn->dd_data;
311 qedi_conn = conn->dd_data;
312 qedi_conn->cls_conn = cls_conn;
313 qedi_conn->qedi = qedi;
314 qedi_conn->ep = NULL;
315 qedi_conn->active_cmd_count = 0;
316 INIT_LIST_HEAD(&qedi_conn->active_cmd_list);
317 spin_lock_init(&qedi_conn->list_lock);
318
319 if (qedi_conn_alloc_login_resources(qedi, qedi_conn)) {
320 iscsi_conn_printk(KERN_ALERT, conn,
321 "conn_new: login resc alloc failed, cid=0x%x, cls_sess=%p!!\n",
322 cid, cls_session);
323 goto free_conn;
324 }
325
326 return cls_conn;
327
328free_conn:
329 iscsi_conn_teardown(cls_conn);
330 return NULL;
331}
332
333void qedi_mark_device_missing(struct iscsi_cls_session *cls_session)
334{
335 iscsi_block_session(cls_session);
336}
337
338void qedi_mark_device_available(struct iscsi_cls_session *cls_session)
339{
340 iscsi_unblock_session(cls_session);
341}
342
343static int qedi_bind_conn_to_iscsi_cid(struct qedi_ctx *qedi,
344 struct qedi_conn *qedi_conn)
345{
346 u32 iscsi_cid = qedi_conn->iscsi_conn_id;
347
348 if (qedi->cid_que.conn_cid_tbl[iscsi_cid]) {
349 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
350 "conn bind - entry #%d not free\n",
351 iscsi_cid);
352 return -EBUSY;
353 }
354
355 qedi->cid_que.conn_cid_tbl[iscsi_cid] = qedi_conn;
356 return 0;
357}
358
359struct qedi_conn *qedi_get_conn_from_id(struct qedi_ctx *qedi, u32 iscsi_cid)
360{
361 if (!qedi->cid_que.conn_cid_tbl) {
362 QEDI_ERR(&qedi->dbg_ctx, "missing conn<->cid table\n");
363 return NULL;
364
365 } else if (iscsi_cid >= qedi->max_active_conns) {
366 QEDI_ERR(&qedi->dbg_ctx, "wrong cid #%d\n", iscsi_cid);
367 return NULL;
368 }
369 return qedi->cid_que.conn_cid_tbl[iscsi_cid];
370}
371
372static int qedi_conn_bind(struct iscsi_cls_session *cls_session,
373 struct iscsi_cls_conn *cls_conn,
374 u64 transport_fd, int is_leading)
375{
376 struct iscsi_conn *conn = cls_conn->dd_data;
377 struct qedi_conn *qedi_conn = conn->dd_data;
378 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
379 struct qedi_ctx *qedi = iscsi_host_priv(shost);
380 struct qedi_endpoint *qedi_ep;
381 struct iscsi_endpoint *ep;
382
383 ep = iscsi_lookup_endpoint(transport_fd);
384 if (!ep)
385 return -EINVAL;
386
387 qedi_ep = ep->dd_data;
388 if ((qedi_ep->state == EP_STATE_TCP_FIN_RCVD) ||
389 (qedi_ep->state == EP_STATE_TCP_RST_RCVD))
390 return -EINVAL;
391
392 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
393 return -EINVAL;
394
395 qedi_ep->conn = qedi_conn;
396 qedi_conn->ep = qedi_ep;
397 qedi_conn->iscsi_conn_id = qedi_ep->iscsi_cid;
398 qedi_conn->fw_cid = qedi_ep->fw_cid;
399 qedi_conn->cmd_cleanup_req = 0;
400 qedi_conn->cmd_cleanup_cmpl = 0;
401
402 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn))
403 return -EINVAL;
404
405 spin_lock_init(&qedi_conn->tmf_work_lock);
406 INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
407 init_waitqueue_head(&qedi_conn->wait_queue);
408 return 0;
409}
410
411static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
412 struct qedi_conn *qedi_conn)
413{
414 struct qed_iscsi_params_update *conn_info;
415 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
416 struct iscsi_conn *conn = cls_conn->dd_data;
417 struct qedi_endpoint *qedi_ep;
418 int rval;
419
420 qedi_ep = qedi_conn->ep;
421
422 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
423 if (!conn_info) {
424 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
425 return -ENOMEM;
426 }
427
428 conn_info->update_flag = 0;
429
430 if (conn->hdrdgst_en)
431 SET_FIELD(conn_info->update_flag,
432 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
433 if (conn->datadgst_en)
434 SET_FIELD(conn_info->update_flag,
435 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
436 if (conn->session->initial_r2t_en)
437 SET_FIELD(conn_info->update_flag,
438 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
439 true);
440 if (conn->session->imm_data_en)
441 SET_FIELD(conn_info->update_flag,
442 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
443 true);
444
445 conn_info->max_seq_size = conn->session->max_burst;
446 conn_info->max_recv_pdu_length = conn->max_recv_dlength;
447 conn_info->max_send_pdu_length = conn->max_xmit_dlength;
448 conn_info->first_seq_length = conn->session->first_burst;
449 conn_info->exp_stat_sn = conn->exp_statsn;
450
451 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
452 conn_info);
453 if (rval) {
454 rval = -ENXIO;
455 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
456 goto update_conn_err;
457 }
458
459 kfree(conn_info);
460 rval = 0;
461
462update_conn_err:
463 return rval;
464}
465
466static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
467{
468 u16 mss = 0;
469 u16 hdrs = TCP_HDR_LEN;
470
471 if (is_ipv6)
472 hdrs += IPV6_HDR_LEN;
473 else
474 hdrs += IPV4_HDR_LEN;
475
476 if (vlan_en)
477 hdrs += VLAN_LEN;
478
479 mss = pmtu - hdrs;
480
481 if (tcp_ts_en)
482 mss -= TCP_OPTION_LEN;
483
484 if (!mss)
485 mss = DEF_MSS;
486
487 return mss;
488}
489
490static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
491{
492 struct qedi_ctx *qedi = qedi_ep->qedi;
493 struct qed_iscsi_params_offload *conn_info;
494 int rval;
495 int i;
496
497 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
498 if (!conn_info) {
499 QEDI_ERR(&qedi->dbg_ctx,
500 "Failed to allocate memory ep=%p\n", qedi_ep);
501 return -ENOMEM;
502 }
503
504 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
505 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
506
507 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
508 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
509
510 if (qedi_ep->ip_type == TCP_IPV4) {
511 conn_info->ip_version = 0;
512 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
513 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
514 qedi_ep->src_addr, qedi_ep->dst_addr);
515 } else {
516 for (i = 1; i < 4; i++) {
517 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
518 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
519 }
520
521 conn_info->ip_version = 1;
522 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
523 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
524 qedi_ep->src_addr, qedi_ep->dst_addr);
525 }
526
527 conn_info->src.port = qedi_ep->src_port;
528 conn_info->dst.port = qedi_ep->dst_port;
529
530 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
531 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
532 conn_info->vlan_id = qedi_ep->vlan_id;
533
534 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
535 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
536 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
537 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
538
539 conn_info->default_cq = (qedi_ep->fw_cid % 8);
540
541 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
542 conn_info->dup_ack_theshold = 3;
543 conn_info->rcv_wnd = 65535;
544 conn_info->cwnd = DEF_MAX_CWND;
545
546 conn_info->ss_thresh = 65535;
547 conn_info->srtt = 300;
548 conn_info->rtt_var = 150;
549 conn_info->flow_label = 0;
550 conn_info->ka_timeout = DEF_KA_TIMEOUT;
551 conn_info->ka_interval = DEF_KA_INTERVAL;
552 conn_info->max_rt_time = DEF_MAX_RT_TIME;
553 conn_info->ttl = DEF_TTL;
554 conn_info->tos_or_tc = DEF_TOS;
555 conn_info->remote_port = qedi_ep->dst_port;
556 conn_info->local_port = qedi_ep->src_port;
557
558 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
559 (qedi_ep->ip_type == TCP_IPV6),
560 1, (qedi_ep->vlan_id != 0));
561
562 conn_info->rcv_wnd_scale = 4;
563 conn_info->ts_ticks_per_second = 1000;
564 conn_info->da_timeout_value = 200;
565 conn_info->ack_frequency = 2;
566
567 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
568 "Default cq index [%d], mss [%d]\n",
569 conn_info->default_cq, conn_info->mss);
570
571 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
572 if (rval)
573 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
574 rval, qedi_ep);
575
576 kfree(conn_info);
577 return rval;
578}
579
580static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
581{
582 struct iscsi_conn *conn = cls_conn->dd_data;
583 struct qedi_conn *qedi_conn = conn->dd_data;
584 struct qedi_ctx *qedi;
585 int rval;
586
587 qedi = qedi_conn->qedi;
588
589 rval = qedi_iscsi_update_conn(qedi, qedi_conn);
590 if (rval) {
591 iscsi_conn_printk(KERN_ALERT, conn,
592 "conn_start: FW oflload conn failed.\n");
593 rval = -EINVAL;
594 goto start_err;
595 }
596
597 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
598 qedi_conn->abrt_conn = 0;
599
600 rval = iscsi_conn_start(cls_conn);
601 if (rval) {
602 iscsi_conn_printk(KERN_ALERT, conn,
603 "iscsi_conn_start: FW oflload conn failed!!\n");
604 }
605
606start_err:
607 return rval;
608}
609
610static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
611{
612 struct iscsi_conn *conn = cls_conn->dd_data;
613 struct qedi_conn *qedi_conn = conn->dd_data;
614 struct Scsi_Host *shost;
615 struct qedi_ctx *qedi;
616
617 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
618 qedi = iscsi_host_priv(shost);
619
620 qedi_conn_free_login_resources(qedi, qedi_conn);
621 iscsi_conn_teardown(cls_conn);
622}
623
624static int qedi_ep_get_param(struct iscsi_endpoint *ep,
625 enum iscsi_param param, char *buf)
626{
627 struct qedi_endpoint *qedi_ep = ep->dd_data;
628 int len;
629
630 if (!qedi_ep)
631 return -ENOTCONN;
632
633 switch (param) {
634 case ISCSI_PARAM_CONN_PORT:
635 len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
636 break;
637 case ISCSI_PARAM_CONN_ADDRESS:
638 if (qedi_ep->ip_type == TCP_IPV4)
639 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
640 else
641 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
642 break;
643 default:
644 return -ENOTCONN;
645 }
646
647 return len;
648}
649
650static int qedi_host_get_param(struct Scsi_Host *shost,
651 enum iscsi_host_param param, char *buf)
652{
653 struct qedi_ctx *qedi;
654 int len;
655
656 qedi = iscsi_host_priv(shost);
657
658 switch (param) {
659 case ISCSI_HOST_PARAM_HWADDRESS:
660 len = sysfs_format_mac(buf, qedi->mac, 6);
661 break;
662 case ISCSI_HOST_PARAM_NETDEV_NAME:
663 len = sprintf(buf, "host%d\n", shost->host_no);
664 break;
665 case ISCSI_HOST_PARAM_IPADDRESS:
666 if (qedi->ip_type == TCP_IPV4)
667 len = sprintf(buf, "%pI4\n", qedi->src_ip);
668 else
669 len = sprintf(buf, "%pI6\n", qedi->src_ip);
670 break;
671 default:
672 return iscsi_host_get_param(shost, param, buf);
673 }
674
675 return len;
676}
677
678static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
679 struct iscsi_stats *stats)
680{
681 struct iscsi_conn *conn = cls_conn->dd_data;
682 struct qed_iscsi_stats iscsi_stats;
683 struct Scsi_Host *shost;
684 struct qedi_ctx *qedi;
685
686 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
687 qedi = iscsi_host_priv(shost);
688 qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
689
690 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
691 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
692 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
693 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
694 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
695
696 stats->txdata_octets = conn->txdata_octets;
697 stats->rxdata_octets = conn->rxdata_octets;
698 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
699 stats->dataout_pdus = conn->dataout_pdus_cnt;
700 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
701 stats->datain_pdus = conn->datain_pdus_cnt;
702 stats->r2t_pdus = conn->r2t_pdus_cnt;
703 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
704 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
705 stats->digest_err = 0;
706 stats->timeout_err = 0;
707 strcpy(stats->custom[0].desc, "eh_abort_cnt");
708 stats->custom[0].value = conn->eh_abort_cnt;
709 stats->custom_length = 1;
710}
711
712static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
713{
714 struct iscsi_sge *bd_tbl;
715
716 bd_tbl = (struct iscsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
717
718 bd_tbl->sge_addr.hi =
719 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
720 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
721 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
722 qedi_conn->gen_pdu.req_buf;
723 bd_tbl->reserved0 = 0;
724 bd_tbl = (struct iscsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
725 bd_tbl->sge_addr.hi =
726 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
727 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
728 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
729 bd_tbl->reserved0 = 0;
730}
731
732static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
733{
734 struct qedi_cmd *cmd = task->dd_data;
735 struct qedi_conn *qedi_conn = cmd->conn;
736 char *buf;
737 int data_len;
738 int rc = 0;
739
740 qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
741 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
742 case ISCSI_OP_LOGIN:
743 qedi_send_iscsi_login(qedi_conn, task);
744 break;
745 case ISCSI_OP_NOOP_OUT:
746 data_len = qedi_conn->gen_pdu.req_buf_size;
747 buf = qedi_conn->gen_pdu.req_buf;
748 if (data_len)
749 rc = qedi_send_iscsi_nopout(qedi_conn, task,
750 buf, data_len, 1);
751 else
752 rc = qedi_send_iscsi_nopout(qedi_conn, task,
753 NULL, 0, 1);
754 break;
755 case ISCSI_OP_LOGOUT:
756 rc = qedi_send_iscsi_logout(qedi_conn, task);
757 break;
758 case ISCSI_OP_SCSI_TMFUNC:
759 rc = qedi_iscsi_abort_work(qedi_conn, task);
760 break;
761 case ISCSI_OP_TEXT:
762 rc = qedi_send_iscsi_text(qedi_conn, task);
763 break;
764 default:
765 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
766 "unsupported op 0x%x\n", task->hdr->opcode);
767 }
768
769 return rc;
770}
771
772static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
773{
774 struct qedi_conn *qedi_conn = conn->dd_data;
775 struct qedi_cmd *cmd = task->dd_data;
776
777 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
778
779 qedi_conn->gen_pdu.req_buf_size = task->data_count;
780
781 if (task->data_count) {
782 memcpy(qedi_conn->gen_pdu.req_buf, task->data,
783 task->data_count);
784 qedi_conn->gen_pdu.req_wr_ptr =
785 qedi_conn->gen_pdu.req_buf + task->data_count;
786 }
787
788 cmd->conn = conn->dd_data;
789 cmd->scsi_cmd = NULL;
790 return qedi_iscsi_send_generic_request(task);
791}
792
793static int qedi_task_xmit(struct iscsi_task *task)
794{
795 struct iscsi_conn *conn = task->conn;
796 struct qedi_conn *qedi_conn = conn->dd_data;
797 struct qedi_cmd *cmd = task->dd_data;
798 struct scsi_cmnd *sc = task->sc;
799
800 cmd->state = 0;
801 cmd->task = NULL;
802 cmd->use_slowpath = false;
803 cmd->conn = qedi_conn;
804 cmd->task = task;
805 cmd->io_cmd_in_list = false;
806 INIT_LIST_HEAD(&cmd->io_cmd);
807
808 if (!sc)
809 return qedi_mtask_xmit(conn, task);
810
811 cmd->scsi_cmd = sc;
812 return qedi_iscsi_send_ioreq(task);
813}
814
815static struct iscsi_endpoint *
816qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
817 int non_blocking)
818{
819 struct qedi_ctx *qedi;
820 struct iscsi_endpoint *ep;
821 struct qedi_endpoint *qedi_ep;
822 struct sockaddr_in *addr;
823 struct sockaddr_in6 *addr6;
824 struct qed_dev *cdev = NULL;
825 struct qedi_uio_dev *udev = NULL;
826 struct iscsi_path path_req;
827 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
828 u32 iscsi_cid = QEDI_CID_RESERVED;
829 u16 len = 0;
830 char *buf = NULL;
831 int ret;
832
833 if (!shost) {
834 ret = -ENXIO;
835 QEDI_ERR(NULL, "shost is NULL\n");
836 return ERR_PTR(ret);
837 }
838
839 if (do_not_recover) {
840 ret = -ENOMEM;
841 return ERR_PTR(ret);
842 }
843
844 qedi = iscsi_host_priv(shost);
845 cdev = qedi->cdev;
846 udev = qedi->udev;
847
848 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
849 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
850 ret = -ENOMEM;
851 return ERR_PTR(ret);
852 }
853
854 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
855 if (!ep) {
856 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
857 ret = -ENOMEM;
858 return ERR_PTR(ret);
859 }
860 qedi_ep = ep->dd_data;
861 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
862 qedi_ep->state = EP_STATE_IDLE;
863 qedi_ep->iscsi_cid = (u32)-1;
864 qedi_ep->qedi = qedi;
865
866 if (dst_addr->sa_family == AF_INET) {
867 addr = (struct sockaddr_in *)dst_addr;
868 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
869 sizeof(struct in_addr));
870 qedi_ep->dst_port = ntohs(addr->sin_port);
871 qedi_ep->ip_type = TCP_IPV4;
872 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
873 "dst_addr=%pI4, dst_port=%u\n",
874 qedi_ep->dst_addr, qedi_ep->dst_port);
875 } else if (dst_addr->sa_family == AF_INET6) {
876 addr6 = (struct sockaddr_in6 *)dst_addr;
877 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
878 sizeof(struct in6_addr));
879 qedi_ep->dst_port = ntohs(addr6->sin6_port);
880 qedi_ep->ip_type = TCP_IPV6;
881 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
882 "dst_addr=%pI6, dst_port=%u\n",
883 qedi_ep->dst_addr, qedi_ep->dst_port);
884 } else {
885 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
886 }
887
888 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
889 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
890 ret = -ENXIO;
891 goto ep_conn_exit;
892 }
893
894 ret = qedi_alloc_sq(qedi, qedi_ep);
895 if (ret)
896 goto ep_conn_exit;
897
898 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
899 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
900
901 if (ret) {
902 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
903 ret = -ENXIO;
904 goto ep_free_sq;
905 }
906
907 iscsi_cid = qedi_ep->handle;
908 qedi_ep->iscsi_cid = iscsi_cid;
909
910 init_waitqueue_head(&qedi_ep->ofld_wait);
911 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
912 qedi_ep->state = EP_STATE_OFLDCONN_START;
913 qedi->ep_tbl[iscsi_cid] = qedi_ep;
914
915 buf = (char *)&path_req;
916 len = sizeof(path_req);
917 memset(&path_req, 0, len);
918
919 msg_type = ISCSI_KEVENT_PATH_REQ;
920 path_req.handle = (u64)qedi_ep->iscsi_cid;
921 path_req.pmtu = qedi->ll2_mtu;
922 qedi_ep->pmtu = qedi->ll2_mtu;
923 if (qedi_ep->ip_type == TCP_IPV4) {
924 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
925 sizeof(struct in_addr));
926 path_req.ip_addr_len = 4;
927 } else {
928 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
929 sizeof(struct in6_addr));
930 path_req.ip_addr_len = 16;
931 }
932
933 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
934 len);
935 if (ret) {
936 QEDI_ERR(&qedi->dbg_ctx,
937 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
938 iscsi_cid, ret);
939 goto ep_rel_conn;
940 }
941
942 atomic_inc(&qedi->num_offloads);
943 return ep;
944
945ep_rel_conn:
946 qedi->ep_tbl[iscsi_cid] = NULL;
947 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
948 if (ret)
949 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
950 ret);
951ep_free_sq:
952 qedi_free_sq(qedi, qedi_ep);
953ep_conn_exit:
954 iscsi_destroy_endpoint(ep);
955 return ERR_PTR(ret);
956}
957
958static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
959{
960 struct qedi_endpoint *qedi_ep;
961 int ret = 0;
962
963 if (do_not_recover)
964 return 1;
965
966 qedi_ep = ep->dd_data;
967 if (qedi_ep->state == EP_STATE_IDLE ||
968 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
969 return -1;
970
971 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
972 ret = 1;
973
974 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
975 QEDI_OFLD_WAIT_STATE(qedi_ep),
976 msecs_to_jiffies(timeout_ms));
977
978 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
979 ret = -1;
980
981 if (ret > 0)
982 return 1;
983 else if (!ret)
984 return 0;
985 else
986 return ret;
987}
988
989static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
990{
991 struct qedi_cmd *cmd, *cmd_tmp;
992
993 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
994 io_cmd) {
995 list_del_init(&cmd->io_cmd);
996 qedi_conn->active_cmd_count--;
997 }
998}
999
1000static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
1001{
1002 struct qedi_endpoint *qedi_ep;
1003 struct qedi_conn *qedi_conn = NULL;
1004 struct iscsi_conn *conn = NULL;
1005 struct qedi_ctx *qedi;
1006 int ret = 0;
1007 int wait_delay = 20 * HZ;
1008 int abrt_conn = 0;
1009 int count = 10;
1010
1011 qedi_ep = ep->dd_data;
1012 qedi = qedi_ep->qedi;
1013
1014 flush_work(&qedi_ep->offload_work);
1015
1016 if (qedi_ep->conn) {
1017 qedi_conn = qedi_ep->conn;
1018 conn = qedi_conn->cls_conn->dd_data;
1019 iscsi_suspend_queue(conn);
1020 abrt_conn = qedi_conn->abrt_conn;
1021
1022 while (count--) {
1023 if (!test_bit(QEDI_CONN_FW_CLEANUP,
1024 &qedi_conn->flags)) {
1025 break;
1026 }
1027 msleep(1000);
1028 }
1029
1030 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
1031 if (do_not_recover) {
1032 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1033 "Do not recover cid=0x%x\n",
1034 qedi_ep->iscsi_cid);
1035 goto ep_exit_recover;
1036 }
1037 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1038 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
1039 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
1040 qedi_cleanup_active_cmd_list(qedi_conn);
1041 goto ep_release_conn;
1042 }
1043 }
1044
1045 if (do_not_recover)
1046 goto ep_exit_recover;
1047
1048 switch (qedi_ep->state) {
1049 case EP_STATE_OFLDCONN_START:
1050 goto ep_release_conn;
1051 case EP_STATE_OFLDCONN_FAILED:
1052 break;
1053 case EP_STATE_OFLDCONN_COMPL:
1054 if (unlikely(!qedi_conn))
1055 break;
1056
1057 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1058 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1059 qedi_conn->active_cmd_count, abrt_conn,
1060 qedi_ep->state,
1061 qedi_ep->iscsi_cid,
1062 qedi_ep->conn
1063 );
1064
1065 if (!qedi_conn->active_cmd_count)
1066 abrt_conn = 0;
1067 else
1068 abrt_conn = 1;
1069
1070 if (abrt_conn)
1071 qedi_clearsq(qedi, qedi_conn, NULL);
1072 break;
1073 default:
1074 break;
1075 }
1076
1077 qedi_ep->state = EP_STATE_DISCONN_START;
1078 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1079 if (ret) {
1080 QEDI_WARN(&qedi->dbg_ctx,
1081 "destroy_conn failed returned %d\n", ret);
1082 } else {
1083 ret = wait_event_interruptible_timeout(
1084 qedi_ep->tcp_ofld_wait,
1085 (qedi_ep->state !=
1086 EP_STATE_DISCONN_START),
1087 wait_delay);
1088 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1089 QEDI_WARN(&qedi->dbg_ctx,
1090 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1091 ret, wait_delay, qedi_ep->iscsi_cid);
1092 }
1093 }
1094
1095ep_release_conn:
1096 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1097 if (ret)
1098 QEDI_WARN(&qedi->dbg_ctx,
1099 "release_conn returned %d, cid=0x%x\n",
1100 ret, qedi_ep->iscsi_cid);
1101ep_exit_recover:
1102 qedi_ep->state = EP_STATE_IDLE;
1103 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1104 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1105 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1106 qedi_free_sq(qedi, qedi_ep);
1107
1108 if (qedi_conn)
1109 qedi_conn->ep = NULL;
1110
1111 qedi_ep->conn = NULL;
1112 qedi_ep->qedi = NULL;
1113 atomic_dec(&qedi->num_offloads);
1114
1115 iscsi_destroy_endpoint(ep);
1116}
1117
1118static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1119{
1120 struct qed_dev *cdev = qedi->cdev;
1121 struct qedi_uio_dev *udev;
1122 struct qedi_uio_ctrl *uctrl;
1123 struct sk_buff *skb;
1124 u32 len;
1125 int rc = 0;
1126
1127 udev = qedi->udev;
1128 if (!udev) {
1129 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1130 return -EINVAL;
1131 }
1132
1133 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1134 if (!uctrl) {
1135 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1136 return -EINVAL;
1137 }
1138
1139 len = uctrl->host_tx_pkt_len;
1140 if (!len) {
1141 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1142 return -EINVAL;
1143 }
1144
1145 skb = alloc_skb(len, GFP_ATOMIC);
1146 if (!skb) {
1147 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1148 return -EINVAL;
1149 }
1150
1151 skb_put(skb, len);
1152 memcpy(skb->data, udev->tx_pkt, len);
1153 skb->ip_summed = CHECKSUM_NONE;
1154
1155 if (vlanid)
1156 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1157
1158 rc = qedi_ops->ll2->start_xmit(cdev, skb);
1159 if (rc) {
1160 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1161 rc);
1162 kfree_skb(skb);
1163 }
1164
1165 uctrl->host_tx_pkt_len = 0;
1166 uctrl->hw_tx_cons++;
1167
1168 return rc;
1169}
1170
1171static void qedi_offload_work(struct work_struct *work)
1172{
1173 struct qedi_endpoint *qedi_ep =
1174 container_of(work, struct qedi_endpoint, offload_work);
1175 struct qedi_ctx *qedi;
1176 int wait_delay = 20 * HZ;
1177 int ret;
1178
1179 qedi = qedi_ep->qedi;
1180
1181 ret = qedi_iscsi_offload_conn(qedi_ep);
1182 if (ret) {
1183 QEDI_ERR(&qedi->dbg_ctx,
1184 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1185 qedi_ep->iscsi_cid, qedi_ep, ret);
1186 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1187 return;
1188 }
1189
1190 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1191 (qedi_ep->state ==
1192 EP_STATE_OFLDCONN_COMPL),
1193 wait_delay);
1194 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1195 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1196 QEDI_ERR(&qedi->dbg_ctx,
1197 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1198 qedi_ep->iscsi_cid, qedi_ep);
1199 }
1200}
1201
1202static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1203{
1204 struct qedi_ctx *qedi;
1205 struct qedi_endpoint *qedi_ep;
1206 int ret = 0;
1207 u32 iscsi_cid;
1208 u16 port_id = 0;
1209
1210 if (!shost) {
1211 ret = -ENXIO;
1212 QEDI_ERR(NULL, "shost is NULL\n");
1213 return ret;
1214 }
1215
1216 if (strcmp(shost->hostt->proc_name, "qedi")) {
1217 ret = -ENXIO;
1218 QEDI_ERR(NULL, "shost %s is invalid\n",
1219 shost->hostt->proc_name);
1220 return ret;
1221 }
1222
1223 qedi = iscsi_host_priv(shost);
1224 if (path_data->handle == QEDI_PATH_HANDLE) {
1225 ret = qedi_data_avail(qedi, path_data->vlan_id);
1226 goto set_path_exit;
1227 }
1228
1229 iscsi_cid = (u32)path_data->handle;
1230 qedi_ep = qedi->ep_tbl[iscsi_cid];
1231 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1232 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
1233
1234 if (!is_valid_ether_addr(&path_data->mac_addr[0])) {
1235 QEDI_NOTICE(&qedi->dbg_ctx, "dst mac NOT VALID\n");
1236 ret = -EIO;
1237 goto set_path_exit;
1238 }
1239
1240 ether_addr_copy(&qedi_ep->src_mac[0], &qedi->mac[0]);
1241 ether_addr_copy(&qedi_ep->dst_mac[0], &path_data->mac_addr[0]);
1242
1243 qedi_ep->vlan_id = path_data->vlan_id;
1244 if (path_data->pmtu < DEF_PATH_MTU) {
1245 qedi_ep->pmtu = qedi->ll2_mtu;
1246 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1247 "MTU cannot be %u, using default MTU %u\n",
1248 path_data->pmtu, qedi_ep->pmtu);
1249 }
1250
1251 if (path_data->pmtu != qedi->ll2_mtu) {
1252 if (path_data->pmtu > JUMBO_MTU) {
1253 ret = -EINVAL;
1254 QEDI_ERR(NULL, "Invalid MTU %u\n", path_data->pmtu);
1255 goto set_path_exit;
1256 }
1257
1258 qedi_reset_host_mtu(qedi, path_data->pmtu);
1259 qedi_ep->pmtu = qedi->ll2_mtu;
1260 }
1261
1262 port_id = qedi_ep->src_port;
1263 if (port_id >= QEDI_LOCAL_PORT_MIN &&
1264 port_id < QEDI_LOCAL_PORT_MAX) {
1265 if (qedi_alloc_id(&qedi->lcl_port_tbl, port_id))
1266 port_id = 0;
1267 } else {
1268 port_id = 0;
1269 }
1270
1271 if (!port_id) {
1272 port_id = qedi_alloc_new_id(&qedi->lcl_port_tbl);
1273 if (port_id == QEDI_LOCAL_PORT_INVALID) {
1274 QEDI_ERR(&qedi->dbg_ctx,
1275 "Failed to allocate port id for iscsi_cid=0x%x\n",
1276 iscsi_cid);
1277 ret = -ENOMEM;
1278 goto set_path_exit;
1279 }
1280 }
1281
1282 qedi_ep->src_port = port_id;
1283
1284 if (qedi_ep->ip_type == TCP_IPV4) {
1285 memcpy(&qedi_ep->src_addr[0], &path_data->src.v4_addr,
1286 sizeof(struct in_addr));
1287 memcpy(&qedi->src_ip[0], &path_data->src.v4_addr,
1288 sizeof(struct in_addr));
1289 qedi->ip_type = TCP_IPV4;
1290
1291 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1292 "src addr:port=%pI4:%u, dst addr:port=%pI4:%u\n",
1293 qedi_ep->src_addr, qedi_ep->src_port,
1294 qedi_ep->dst_addr, qedi_ep->dst_port);
1295 } else {
1296 memcpy(&qedi_ep->src_addr[0], &path_data->src.v6_addr,
1297 sizeof(struct in6_addr));
1298 memcpy(&qedi->src_ip[0], &path_data->src.v6_addr,
1299 sizeof(struct in6_addr));
1300 qedi->ip_type = TCP_IPV6;
1301
1302 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
1303 "src addr:port=%pI6:%u, dst addr:port=%pI6:%u\n",
1304 qedi_ep->src_addr, qedi_ep->src_port,
1305 qedi_ep->dst_addr, qedi_ep->dst_port);
1306 }
1307
1308 INIT_WORK(&qedi_ep->offload_work, qedi_offload_work);
1309 queue_work(qedi->offload_thread, &qedi_ep->offload_work);
1310
1311 ret = 0;
1312
1313set_path_exit:
1314 return ret;
1315}
1316
1317static umode_t qedi_attr_is_visible(int param_type, int param)
1318{
1319 switch (param_type) {
1320 case ISCSI_HOST_PARAM:
1321 switch (param) {
1322 case ISCSI_HOST_PARAM_NETDEV_NAME:
1323 case ISCSI_HOST_PARAM_HWADDRESS:
1324 case ISCSI_HOST_PARAM_IPADDRESS:
1325 return 0444;
1326 default:
1327 return 0;
1328 }
1329 case ISCSI_PARAM:
1330 switch (param) {
1331 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1332 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1333 case ISCSI_PARAM_HDRDGST_EN:
1334 case ISCSI_PARAM_DATADGST_EN:
1335 case ISCSI_PARAM_CONN_ADDRESS:
1336 case ISCSI_PARAM_CONN_PORT:
1337 case ISCSI_PARAM_EXP_STATSN:
1338 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1339 case ISCSI_PARAM_PERSISTENT_PORT:
1340 case ISCSI_PARAM_PING_TMO:
1341 case ISCSI_PARAM_RECV_TMO:
1342 case ISCSI_PARAM_INITIAL_R2T_EN:
1343 case ISCSI_PARAM_MAX_R2T:
1344 case ISCSI_PARAM_IMM_DATA_EN:
1345 case ISCSI_PARAM_FIRST_BURST:
1346 case ISCSI_PARAM_MAX_BURST:
1347 case ISCSI_PARAM_PDU_INORDER_EN:
1348 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1349 case ISCSI_PARAM_ERL:
1350 case ISCSI_PARAM_TARGET_NAME:
1351 case ISCSI_PARAM_TPGT:
1352 case ISCSI_PARAM_USERNAME:
1353 case ISCSI_PARAM_PASSWORD:
1354 case ISCSI_PARAM_USERNAME_IN:
1355 case ISCSI_PARAM_PASSWORD_IN:
1356 case ISCSI_PARAM_FAST_ABORT:
1357 case ISCSI_PARAM_ABORT_TMO:
1358 case ISCSI_PARAM_LU_RESET_TMO:
1359 case ISCSI_PARAM_TGT_RESET_TMO:
1360 case ISCSI_PARAM_IFACE_NAME:
1361 case ISCSI_PARAM_INITIATOR_NAME:
1362 case ISCSI_PARAM_BOOT_ROOT:
1363 case ISCSI_PARAM_BOOT_NIC:
1364 case ISCSI_PARAM_BOOT_TARGET:
1365 return 0444;
1366 default:
1367 return 0;
1368 }
1369 }
1370
1371 return 0;
1372}
1373
1374static void qedi_cleanup_task(struct iscsi_task *task)
1375{
1376 if (!task->sc || task->state == ISCSI_TASK_PENDING) {
1377 QEDI_INFO(NULL, QEDI_LOG_IO, "Returning ref_cnt=%d\n",
1378 atomic_read(&task->refcount));
1379 return;
1380 }
1381
1382 qedi_iscsi_unmap_sg_list(task->dd_data);
1383}
1384
1385struct iscsi_transport qedi_iscsi_transport = {
1386 .owner = THIS_MODULE,
1387 .name = QEDI_MODULE_NAME,
1388 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | CAP_MULTI_R2T | CAP_DATADGST |
1389 CAP_DATA_PATH_OFFLOAD | CAP_TEXT_NEGO,
1390 .create_session = qedi_session_create,
1391 .destroy_session = qedi_session_destroy,
1392 .create_conn = qedi_conn_create,
1393 .bind_conn = qedi_conn_bind,
1394 .start_conn = qedi_conn_start,
1395 .stop_conn = iscsi_conn_stop,
1396 .destroy_conn = qedi_conn_destroy,
1397 .set_param = iscsi_set_param,
1398 .get_ep_param = qedi_ep_get_param,
1399 .get_conn_param = iscsi_conn_get_param,
1400 .get_session_param = iscsi_session_get_param,
1401 .get_host_param = qedi_host_get_param,
1402 .send_pdu = iscsi_conn_send_pdu,
1403 .get_stats = qedi_conn_get_stats,
1404 .xmit_task = qedi_task_xmit,
1405 .cleanup_task = qedi_cleanup_task,
1406 .session_recovery_timedout = iscsi_session_recovery_timedout,
1407 .ep_connect = qedi_ep_connect,
1408 .ep_poll = qedi_ep_poll,
1409 .ep_disconnect = qedi_ep_disconnect,
1410 .set_path = qedi_set_path,
1411 .attr_is_visible = qedi_attr_is_visible,
1412};
1413
1414void qedi_start_conn_recovery(struct qedi_ctx *qedi,
1415 struct qedi_conn *qedi_conn)
1416{
1417 struct iscsi_cls_session *cls_sess;
1418 struct iscsi_cls_conn *cls_conn;
1419 struct iscsi_conn *conn;
1420
1421 cls_conn = qedi_conn->cls_conn;
1422 conn = cls_conn->dd_data;
1423 cls_sess = iscsi_conn_to_session(cls_conn);
1424
1425 if (iscsi_is_session_online(cls_sess)) {
1426 qedi_conn->abrt_conn = 1;
1427 QEDI_ERR(&qedi->dbg_ctx,
1428 "Failing connection, state=0x%x, cid=0x%x\n",
1429 conn->session->state, qedi_conn->iscsi_conn_id);
1430 iscsi_conn_failure(qedi_conn->cls_conn->dd_data,
1431 ISCSI_ERR_CONN_FAILED);
1432 }
1433}
1434
1435static const struct {
1436 enum iscsi_error_types error_code;
1437 char *err_string;
1438} qedi_iscsi_error[] = {
1439 { ISCSI_STATUS_NONE,
1440 "tcp_error none"
1441 },
1442 { ISCSI_CONN_ERROR_TASK_CID_MISMATCH,
1443 "task cid mismatch"
1444 },
1445 { ISCSI_CONN_ERROR_TASK_NOT_VALID,
1446 "invalid task"
1447 },
1448 { ISCSI_CONN_ERROR_RQ_RING_IS_FULL,
1449 "rq ring full"
1450 },
1451 { ISCSI_CONN_ERROR_CMDQ_RING_IS_FULL,
1452 "cmdq ring full"
1453 },
1454 { ISCSI_CONN_ERROR_HQE_CACHING_FAILED,
1455 "sge caching failed"
1456 },
1457 { ISCSI_CONN_ERROR_HEADER_DIGEST_ERROR,
1458 "hdr digest error"
1459 },
1460 { ISCSI_CONN_ERROR_LOCAL_COMPLETION_ERROR,
1461 "local cmpl error"
1462 },
1463 { ISCSI_CONN_ERROR_DATA_OVERRUN,
1464 "invalid task"
1465 },
1466 { ISCSI_CONN_ERROR_OUT_OF_SGES_ERROR,
1467 "out of sge error"
1468 },
1469 { ISCSI_CONN_ERROR_TCP_SEG_PROC_IP_OPTIONS_ERROR,
1470 "tcp seg ip options 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, struct async_data *data)
1564{
1565 struct qedi_conn *qedi_conn;
1566 struct qedi_ctx *qedi;
1567 char warn_notice[] = "iscsi_warning";
1568 char error_notice[] = "iscsi_error";
1569 char unknown_msg[] = "Unknown error";
1570 char *message;
1571 int need_recovery = 0;
1572 u32 err_mask = 0;
1573 char *msg;
1574
1575 if (!ep)
1576 return;
1577
1578 qedi_conn = ep->conn;
1579 if (!qedi_conn)
1580 return;
1581
1582 qedi = ep->qedi;
1583
1584 QEDI_ERR(&qedi->dbg_ctx, "async event iscsi error:0x%x\n",
1585 data->error_code);
1586
1587 if (err_mask) {
1588 need_recovery = 0;
1589 message = warn_notice;
1590 } else {
1591 need_recovery = 1;
1592 message = error_notice;
1593 }
1594
1595 msg = qedi_get_iscsi_error(data->error_code);
1596 if (!msg) {
1597 need_recovery = 0;
1598 msg = unknown_msg;
1599 }
1600
1601 iscsi_conn_printk(KERN_ALERT,
1602 qedi_conn->cls_conn->dd_data,
1603 "qedi: %s - %s\n", message, msg);
1604
1605 if (need_recovery)
1606 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1607}
1608
1609void qedi_process_tcp_error(struct qedi_endpoint *ep, struct async_data *data)
1610{
1611 struct qedi_conn *qedi_conn;
1612
1613 if (!ep)
1614 return;
1615
1616 qedi_conn = ep->conn;
1617 if (!qedi_conn)
1618 return;
1619
1620 QEDI_ERR(&ep->qedi->dbg_ctx, "async event TCP error:0x%x\n",
1621 data->error_code);
1622
1623 qedi_start_conn_recovery(qedi_conn->qedi, qedi_conn);
1624}
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