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Merge branch 'bind_unbind' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
[GitHub/LineageOS/android_kernel_motorola_exynos9610.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,
b6a05c82 51 .eh_timed_out = iscsi_eh_cmd_timed_out,
ace7f46b
MR		 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,
d0788a52 62 .dma_boundary = QEDI_HW_DMA_BOUNDARY,
ace7f46b
MR		 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 *
be086e7c 179 sizeof(struct scsi_sge),
ace7f46b
MR		 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;
be086e7c 195 struct scsi_sge *sge;
ace7f46b
MR		 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_conn_id = qedi_ep->iscsi_cid;
400 qedi_conn->fw_cid = qedi_ep->fw_cid;
401 qedi_conn->cmd_cleanup_req = 0;
402 qedi_conn->cmd_cleanup_cmpl = 0;
403
404 if (qedi_bind_conn_to_iscsi_cid(qedi, qedi_conn))
405 return -EINVAL;
406
407 spin_lock_init(&qedi_conn->tmf_work_lock);
408 INIT_LIST_HEAD(&qedi_conn->tmf_work_list);
409 init_waitqueue_head(&qedi_conn->wait_queue);
410 return 0;
411}
412
413static int qedi_iscsi_update_conn(struct qedi_ctx *qedi,
414 struct qedi_conn *qedi_conn)
415{
416 struct qed_iscsi_params_update *conn_info;
417 struct iscsi_cls_conn *cls_conn = qedi_conn->cls_conn;
418 struct iscsi_conn *conn = cls_conn->dd_data;
419 struct qedi_endpoint *qedi_ep;
420 int rval;
421
422 qedi_ep = qedi_conn->ep;
423
424 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
425 if (!conn_info) {
426 QEDI_ERR(&qedi->dbg_ctx, "memory alloc failed\n");
427 return -ENOMEM;
428 }
429
430 conn_info->update_flag = 0;
431
432 if (conn->hdrdgst_en)
433 SET_FIELD(conn_info->update_flag,
434 ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, true);
435 if (conn->datadgst_en)
436 SET_FIELD(conn_info->update_flag,
437 ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, true);
438 if (conn->session->initial_r2t_en)
439 SET_FIELD(conn_info->update_flag,
440 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T,
441 true);
442 if (conn->session->imm_data_en)
443 SET_FIELD(conn_info->update_flag,
444 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA,
445 true);
446
447 conn_info->max_seq_size = conn->session->max_burst;
448 conn_info->max_recv_pdu_length = conn->max_recv_dlength;
449 conn_info->max_send_pdu_length = conn->max_xmit_dlength;
450 conn_info->first_seq_length = conn->session->first_burst;
451 conn_info->exp_stat_sn = conn->exp_statsn;
452
453 rval = qedi_ops->update_conn(qedi->cdev, qedi_ep->handle,
454 conn_info);
455 if (rval) {
456 rval = -ENXIO;
457 QEDI_ERR(&qedi->dbg_ctx, "Could not update connection\n");
ace7f46b
MR		 458 }
459
460 kfree(conn_info);
ace7f46b
MR		 461 return rval;
462}
463
464static u16 qedi_calc_mss(u16 pmtu, u8 is_ipv6, u8 tcp_ts_en, u8 vlan_en)
465{
466 u16 mss = 0;
467 u16 hdrs = TCP_HDR_LEN;
468
469 if (is_ipv6)
470 hdrs += IPV6_HDR_LEN;
471 else
472 hdrs += IPV4_HDR_LEN;
473
474 if (vlan_en)
475 hdrs += VLAN_LEN;
476
477 mss = pmtu - hdrs;
478
479 if (tcp_ts_en)
480 mss -= TCP_OPTION_LEN;
481
482 if (!mss)
483 mss = DEF_MSS;
484
485 return mss;
486}
487
488static int qedi_iscsi_offload_conn(struct qedi_endpoint *qedi_ep)
489{
490 struct qedi_ctx *qedi = qedi_ep->qedi;
491 struct qed_iscsi_params_offload *conn_info;
492 int rval;
493 int i;
494
495 conn_info = kzalloc(sizeof(*conn_info), GFP_KERNEL);
496 if (!conn_info) {
497 QEDI_ERR(&qedi->dbg_ctx,
498 "Failed to allocate memory ep=%p\n", qedi_ep);
499 return -ENOMEM;
500 }
501
502 ether_addr_copy(conn_info->src.mac, qedi_ep->src_mac);
503 ether_addr_copy(conn_info->dst.mac, qedi_ep->dst_mac);
504
505 conn_info->src.ip[0] = ntohl(qedi_ep->src_addr[0]);
506 conn_info->dst.ip[0] = ntohl(qedi_ep->dst_addr[0]);
507
508 if (qedi_ep->ip_type == TCP_IPV4) {
509 conn_info->ip_version = 0;
510 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
511 "After ntohl: src_addr=%pI4, dst_addr=%pI4\n",
512 qedi_ep->src_addr, qedi_ep->dst_addr);
513 } else {
514 for (i = 1; i < 4; i++) {
515 conn_info->src.ip[i] = ntohl(qedi_ep->src_addr[i]);
516 conn_info->dst.ip[i] = ntohl(qedi_ep->dst_addr[i]);
517 }
518
519 conn_info->ip_version = 1;
520 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
521 "After ntohl: src_addr=%pI6, dst_addr=%pI6\n",
522 qedi_ep->src_addr, qedi_ep->dst_addr);
523 }
524
525 conn_info->src.port = qedi_ep->src_port;
526 conn_info->dst.port = qedi_ep->dst_port;
527
528 conn_info->layer_code = ISCSI_SLOW_PATH_LAYER_CODE;
529 conn_info->sq_pbl_addr = qedi_ep->sq_pbl_dma;
530 conn_info->vlan_id = qedi_ep->vlan_id;
531
532 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_TS_EN, 1);
533 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_EN, 1);
534 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_DA_CNT_EN, 1);
535 SET_FIELD(conn_info->tcp_flags, TCP_OFFLOAD_PARAMS_KA_EN, 1);
536
537 conn_info->default_cq = (qedi_ep->fw_cid % 8);
538
539 conn_info->ka_max_probe_cnt = DEF_KA_MAX_PROBE_COUNT;
540 conn_info->dup_ack_theshold = 3;
541 conn_info->rcv_wnd = 65535;
542 conn_info->cwnd = DEF_MAX_CWND;
543
544 conn_info->ss_thresh = 65535;
545 conn_info->srtt = 300;
546 conn_info->rtt_var = 150;
547 conn_info->flow_label = 0;
548 conn_info->ka_timeout = DEF_KA_TIMEOUT;
549 conn_info->ka_interval = DEF_KA_INTERVAL;
550 conn_info->max_rt_time = DEF_MAX_RT_TIME;
551 conn_info->ttl = DEF_TTL;
552 conn_info->tos_or_tc = DEF_TOS;
553 conn_info->remote_port = qedi_ep->dst_port;
554 conn_info->local_port = qedi_ep->src_port;
555
556 conn_info->mss = qedi_calc_mss(qedi_ep->pmtu,
557 (qedi_ep->ip_type == TCP_IPV6),
558 1, (qedi_ep->vlan_id != 0));
559
560 conn_info->rcv_wnd_scale = 4;
561 conn_info->ts_ticks_per_second = 1000;
562 conn_info->da_timeout_value = 200;
563 conn_info->ack_frequency = 2;
564
565 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
566 "Default cq index [%d], mss [%d]\n",
567 conn_info->default_cq, conn_info->mss);
568
569 rval = qedi_ops->offload_conn(qedi->cdev, qedi_ep->handle, conn_info);
570 if (rval)
571 QEDI_ERR(&qedi->dbg_ctx, "offload_conn returned %d, ep=%p\n",
572 rval, qedi_ep);
573
574 kfree(conn_info);
575 return rval;
576}
577
578static int qedi_conn_start(struct iscsi_cls_conn *cls_conn)
579{
580 struct iscsi_conn *conn = cls_conn->dd_data;
581 struct qedi_conn *qedi_conn = conn->dd_data;
582 struct qedi_ctx *qedi;
583 int rval;
584
585 qedi = qedi_conn->qedi;
586
587 rval = qedi_iscsi_update_conn(qedi, qedi_conn);
588 if (rval) {
589 iscsi_conn_printk(KERN_ALERT, conn,
590 "conn_start: FW oflload conn failed.\n");
591 rval = -EINVAL;
592 goto start_err;
593 }
594
595 clear_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
596 qedi_conn->abrt_conn = 0;
597
598 rval = iscsi_conn_start(cls_conn);
599 if (rval) {
600 iscsi_conn_printk(KERN_ALERT, conn,
601 "iscsi_conn_start: FW oflload conn failed!!\n");
602 }
603
604start_err:
605 return rval;
606}
607
608static void qedi_conn_destroy(struct iscsi_cls_conn *cls_conn)
609{
610 struct iscsi_conn *conn = cls_conn->dd_data;
611 struct qedi_conn *qedi_conn = conn->dd_data;
612 struct Scsi_Host *shost;
613 struct qedi_ctx *qedi;
614
615 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
616 qedi = iscsi_host_priv(shost);
617
618 qedi_conn_free_login_resources(qedi, qedi_conn);
619 iscsi_conn_teardown(cls_conn);
620}
621
622static int qedi_ep_get_param(struct iscsi_endpoint *ep,
623 enum iscsi_param param, char *buf)
624{
625 struct qedi_endpoint *qedi_ep = ep->dd_data;
626 int len;
627
628 if (!qedi_ep)
629 return -ENOTCONN;
630
631 switch (param) {
632 case ISCSI_PARAM_CONN_PORT:
633 len = sprintf(buf, "%hu\n", qedi_ep->dst_port);
634 break;
635 case ISCSI_PARAM_CONN_ADDRESS:
636 if (qedi_ep->ip_type == TCP_IPV4)
637 len = sprintf(buf, "%pI4\n", qedi_ep->dst_addr);
638 else
639 len = sprintf(buf, "%pI6\n", qedi_ep->dst_addr);
640 break;
641 default:
642 return -ENOTCONN;
643 }
644
645 return len;
646}
647
648static int qedi_host_get_param(struct Scsi_Host *shost,
649 enum iscsi_host_param param, char *buf)
650{
651 struct qedi_ctx *qedi;
652 int len;
653
654 qedi = iscsi_host_priv(shost);
655
656 switch (param) {
657 case ISCSI_HOST_PARAM_HWADDRESS:
658 len = sysfs_format_mac(buf, qedi->mac, 6);
659 break;
660 case ISCSI_HOST_PARAM_NETDEV_NAME:
661 len = sprintf(buf, "host%d\n", shost->host_no);
662 break;
663 case ISCSI_HOST_PARAM_IPADDRESS:
664 if (qedi->ip_type == TCP_IPV4)
665 len = sprintf(buf, "%pI4\n", qedi->src_ip);
666 else
667 len = sprintf(buf, "%pI6\n", qedi->src_ip);
668 break;
669 default:
670 return iscsi_host_get_param(shost, param, buf);
671 }
672
673 return len;
674}
675
676static void qedi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
677 struct iscsi_stats *stats)
678{
679 struct iscsi_conn *conn = cls_conn->dd_data;
680 struct qed_iscsi_stats iscsi_stats;
681 struct Scsi_Host *shost;
682 struct qedi_ctx *qedi;
683
684 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
685 qedi = iscsi_host_priv(shost);
686 qedi_ops->get_stats(qedi->cdev, &iscsi_stats);
687
688 conn->txdata_octets = iscsi_stats.iscsi_tx_bytes_cnt;
689 conn->rxdata_octets = iscsi_stats.iscsi_rx_bytes_cnt;
690 conn->dataout_pdus_cnt = (uint32_t)iscsi_stats.iscsi_tx_data_pdu_cnt;
691 conn->datain_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_data_pdu_cnt;
692 conn->r2t_pdus_cnt = (uint32_t)iscsi_stats.iscsi_rx_r2t_pdu_cnt;
693
694 stats->txdata_octets = conn->txdata_octets;
695 stats->rxdata_octets = conn->rxdata_octets;
696 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
697 stats->dataout_pdus = conn->dataout_pdus_cnt;
698 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
699 stats->datain_pdus = conn->datain_pdus_cnt;
700 stats->r2t_pdus = conn->r2t_pdus_cnt;
701 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
702 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
703 stats->digest_err = 0;
704 stats->timeout_err = 0;
705 strcpy(stats->custom[0].desc, "eh_abort_cnt");
706 stats->custom[0].value = conn->eh_abort_cnt;
707 stats->custom_length = 1;
708}
709
710static void qedi_iscsi_prep_generic_pdu_bd(struct qedi_conn *qedi_conn)
711{
be086e7c 712 struct scsi_sge *bd_tbl;
ace7f46b 713
be086e7c 714 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.req_bd_tbl;
ace7f46b
MR		 715
716 bd_tbl->sge_addr.hi =
717 (u32)((u64)qedi_conn->gen_pdu.req_dma_addr >> 32);
718 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.req_dma_addr;
719 bd_tbl->sge_len = qedi_conn->gen_pdu.req_wr_ptr -
720 qedi_conn->gen_pdu.req_buf;
be086e7c 721 bd_tbl = (struct scsi_sge *)qedi_conn->gen_pdu.resp_bd_tbl;
ace7f46b
MR		 722 bd_tbl->sge_addr.hi =
723 (u32)((u64)qedi_conn->gen_pdu.resp_dma_addr >> 32);
724 bd_tbl->sge_addr.lo = (u32)qedi_conn->gen_pdu.resp_dma_addr;
725 bd_tbl->sge_len = ISCSI_DEF_MAX_RECV_SEG_LEN;
ace7f46b
MR		 726}
727
728static int qedi_iscsi_send_generic_request(struct iscsi_task *task)
729{
730 struct qedi_cmd *cmd = task->dd_data;
731 struct qedi_conn *qedi_conn = cmd->conn;
732 char *buf;
733 int data_len;
734 int rc = 0;
735
736 qedi_iscsi_prep_generic_pdu_bd(qedi_conn);
737 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
738 case ISCSI_OP_LOGIN:
739 qedi_send_iscsi_login(qedi_conn, task);
740 break;
741 case ISCSI_OP_NOOP_OUT:
742 data_len = qedi_conn->gen_pdu.req_buf_size;
743 buf = qedi_conn->gen_pdu.req_buf;
744 if (data_len)
745 rc = qedi_send_iscsi_nopout(qedi_conn, task,
746 buf, data_len, 1);
747 else
748 rc = qedi_send_iscsi_nopout(qedi_conn, task,
749 NULL, 0, 1);
750 break;
751 case ISCSI_OP_LOGOUT:
752 rc = qedi_send_iscsi_logout(qedi_conn, task);
753 break;
754 case ISCSI_OP_SCSI_TMFUNC:
755 rc = qedi_iscsi_abort_work(qedi_conn, task);
756 break;
757 case ISCSI_OP_TEXT:
758 rc = qedi_send_iscsi_text(qedi_conn, task);
759 break;
760 default:
761 iscsi_conn_printk(KERN_ALERT, qedi_conn->cls_conn->dd_data,
762 "unsupported op 0x%x\n", task->hdr->opcode);
763 }
764
765 return rc;
766}
767
768static int qedi_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
769{
770 struct qedi_conn *qedi_conn = conn->dd_data;
771 struct qedi_cmd *cmd = task->dd_data;
772
773 memset(qedi_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
774
775 qedi_conn->gen_pdu.req_buf_size = task->data_count;
776
777 if (task->data_count) {
778 memcpy(qedi_conn->gen_pdu.req_buf, task->data,
779 task->data_count);
780 qedi_conn->gen_pdu.req_wr_ptr =
781 qedi_conn->gen_pdu.req_buf + task->data_count;
782 }
783
784 cmd->conn = conn->dd_data;
785 cmd->scsi_cmd = NULL;
786 return qedi_iscsi_send_generic_request(task);
787}
788
789static int qedi_task_xmit(struct iscsi_task *task)
790{
791 struct iscsi_conn *conn = task->conn;
792 struct qedi_conn *qedi_conn = conn->dd_data;
793 struct qedi_cmd *cmd = task->dd_data;
794 struct scsi_cmnd *sc = task->sc;
795
796 cmd->state = 0;
797 cmd->task = NULL;
798 cmd->use_slowpath = false;
799 cmd->conn = qedi_conn;
800 cmd->task = task;
801 cmd->io_cmd_in_list = false;
802 INIT_LIST_HEAD(&cmd->io_cmd);
803
804 if (!sc)
805 return qedi_mtask_xmit(conn, task);
806
807 cmd->scsi_cmd = sc;
808 return qedi_iscsi_send_ioreq(task);
809}
810
811static struct iscsi_endpoint *
812qedi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
813 int non_blocking)
814{
815 struct qedi_ctx *qedi;
816 struct iscsi_endpoint *ep;
817 struct qedi_endpoint *qedi_ep;
818 struct sockaddr_in *addr;
819 struct sockaddr_in6 *addr6;
820 struct qed_dev *cdev = NULL;
821 struct qedi_uio_dev *udev = NULL;
822 struct iscsi_path path_req;
823 u32 msg_type = ISCSI_KEVENT_IF_DOWN;
824 u32 iscsi_cid = QEDI_CID_RESERVED;
825 u16 len = 0;
826 char *buf = NULL;
827 int ret;
828
829 if (!shost) {
830 ret = -ENXIO;
831 QEDI_ERR(NULL, "shost is NULL\n");
832 return ERR_PTR(ret);
833 }
834
bd571195 835 if (qedi_do_not_recover) {
ace7f46b
MR		 836 ret = -ENOMEM;
837 return ERR_PTR(ret);
838 }
839
840 qedi = iscsi_host_priv(shost);
841 cdev = qedi->cdev;
842 udev = qedi->udev;
843
844 if (test_bit(QEDI_IN_OFFLINE, &qedi->flags) ||
845 test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
846 ret = -ENOMEM;
847 return ERR_PTR(ret);
848 }
849
850 ep = iscsi_create_endpoint(sizeof(struct qedi_endpoint));
851 if (!ep) {
852 QEDI_ERR(&qedi->dbg_ctx, "endpoint create fail\n");
853 ret = -ENOMEM;
854 return ERR_PTR(ret);
855 }
856 qedi_ep = ep->dd_data;
857 memset(qedi_ep, 0, sizeof(struct qedi_endpoint));
858 qedi_ep->state = EP_STATE_IDLE;
859 qedi_ep->iscsi_cid = (u32)-1;
860 qedi_ep->qedi = qedi;
861
862 if (dst_addr->sa_family == AF_INET) {
863 addr = (struct sockaddr_in *)dst_addr;
864 memcpy(qedi_ep->dst_addr, &addr->sin_addr.s_addr,
865 sizeof(struct in_addr));
866 qedi_ep->dst_port = ntohs(addr->sin_port);
867 qedi_ep->ip_type = TCP_IPV4;
868 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
869 "dst_addr=%pI4, dst_port=%u\n",
870 qedi_ep->dst_addr, qedi_ep->dst_port);
871 } else if (dst_addr->sa_family == AF_INET6) {
872 addr6 = (struct sockaddr_in6 *)dst_addr;
873 memcpy(qedi_ep->dst_addr, &addr6->sin6_addr,
874 sizeof(struct in6_addr));
875 qedi_ep->dst_port = ntohs(addr6->sin6_port);
876 qedi_ep->ip_type = TCP_IPV6;
877 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_CONN,
878 "dst_addr=%pI6, dst_port=%u\n",
879 qedi_ep->dst_addr, qedi_ep->dst_port);
880 } else {
881 QEDI_ERR(&qedi->dbg_ctx, "Invalid endpoint\n");
882 }
883
884 if (atomic_read(&qedi->link_state) != QEDI_LINK_UP) {
885 QEDI_WARN(&qedi->dbg_ctx, "qedi link down\n");
886 ret = -ENXIO;
887 goto ep_conn_exit;
888 }
889
890 ret = qedi_alloc_sq(qedi, qedi_ep);
891 if (ret)
892 goto ep_conn_exit;
893
894 ret = qedi_ops->acquire_conn(qedi->cdev, &qedi_ep->handle,
895 &qedi_ep->fw_cid, &qedi_ep->p_doorbell);
896
897 if (ret) {
898 QEDI_ERR(&qedi->dbg_ctx, "Could not acquire connection\n");
899 ret = -ENXIO;
900 goto ep_free_sq;
901 }
902
903 iscsi_cid = qedi_ep->handle;
904 qedi_ep->iscsi_cid = iscsi_cid;
905
906 init_waitqueue_head(&qedi_ep->ofld_wait);
907 init_waitqueue_head(&qedi_ep->tcp_ofld_wait);
908 qedi_ep->state = EP_STATE_OFLDCONN_START;
909 qedi->ep_tbl[iscsi_cid] = qedi_ep;
910
911 buf = (char *)&path_req;
912 len = sizeof(path_req);
913 memset(&path_req, 0, len);
914
915 msg_type = ISCSI_KEVENT_PATH_REQ;
916 path_req.handle = (u64)qedi_ep->iscsi_cid;
917 path_req.pmtu = qedi->ll2_mtu;
918 qedi_ep->pmtu = qedi->ll2_mtu;
919 if (qedi_ep->ip_type == TCP_IPV4) {
920 memcpy(&path_req.dst.v4_addr, &qedi_ep->dst_addr,
921 sizeof(struct in_addr));
922 path_req.ip_addr_len = 4;
923 } else {
924 memcpy(&path_req.dst.v6_addr, &qedi_ep->dst_addr,
925 sizeof(struct in6_addr));
926 path_req.ip_addr_len = 16;
927 }
928
929 ret = iscsi_offload_mesg(shost, &qedi_iscsi_transport, msg_type, buf,
930 len);
931 if (ret) {
932 QEDI_ERR(&qedi->dbg_ctx,
933 "iscsi_offload_mesg() failed for cid=0x%x ret=%d\n",
934 iscsi_cid, ret);
935 goto ep_rel_conn;
936 }
937
938 atomic_inc(&qedi->num_offloads);
939 return ep;
940
941ep_rel_conn:
942 qedi->ep_tbl[iscsi_cid] = NULL;
943 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
944 if (ret)
945 QEDI_WARN(&qedi->dbg_ctx, "release_conn returned %d\n",
946 ret);
947ep_free_sq:
948 qedi_free_sq(qedi, qedi_ep);
949ep_conn_exit:
950 iscsi_destroy_endpoint(ep);
951 return ERR_PTR(ret);
952}
953
954static int qedi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
955{
956 struct qedi_endpoint *qedi_ep;
957 int ret = 0;
958
bd571195 959 if (qedi_do_not_recover)
ace7f46b
MR		 960 return 1;
961
962 qedi_ep = ep->dd_data;
963 if (qedi_ep->state == EP_STATE_IDLE ||
964 qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
965 return -1;
966
967 if (qedi_ep->state == EP_STATE_OFLDCONN_COMPL)
968 ret = 1;
969
970 ret = wait_event_interruptible_timeout(qedi_ep->ofld_wait,
971 QEDI_OFLD_WAIT_STATE(qedi_ep),
972 msecs_to_jiffies(timeout_ms));
973
974 if (qedi_ep->state == EP_STATE_OFLDCONN_FAILED)
975 ret = -1;
976
977 if (ret > 0)
978 return 1;
979 else if (!ret)
980 return 0;
981 else
982 return ret;
983}
984
985static void qedi_cleanup_active_cmd_list(struct qedi_conn *qedi_conn)
986{
987 struct qedi_cmd *cmd, *cmd_tmp;
988
989 list_for_each_entry_safe(cmd, cmd_tmp, &qedi_conn->active_cmd_list,
990 io_cmd) {
991 list_del_init(&cmd->io_cmd);
992 qedi_conn->active_cmd_count--;
993 }
994}
995
996static void qedi_ep_disconnect(struct iscsi_endpoint *ep)
997{
998 struct qedi_endpoint *qedi_ep;
999 struct qedi_conn *qedi_conn = NULL;
1000 struct iscsi_conn *conn = NULL;
1001 struct qedi_ctx *qedi;
1002 int ret = 0;
1003 int wait_delay = 20 * HZ;
1004 int abrt_conn = 0;
1005 int count = 10;
1006
1007 qedi_ep = ep->dd_data;
1008 qedi = qedi_ep->qedi;
1009
1010 flush_work(&qedi_ep->offload_work);
1011
1012 if (qedi_ep->conn) {
1013 qedi_conn = qedi_ep->conn;
1014 conn = qedi_conn->cls_conn->dd_data;
1015 iscsi_suspend_queue(conn);
1016 abrt_conn = qedi_conn->abrt_conn;
1017
1018 while (count--) {
1019 if (!test_bit(QEDI_CONN_FW_CLEANUP,
1020 &qedi_conn->flags)) {
1021 break;
1022 }
1023 msleep(1000);
1024 }
1025
1026 if (test_bit(QEDI_IN_RECOVERY, &qedi->flags)) {
bd571195 1027 if (qedi_do_not_recover) {
ace7f46b
MR		 1028 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1029 "Do not recover cid=0x%x\n",
1030 qedi_ep->iscsi_cid);
1031 goto ep_exit_recover;
1032 }
1033 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1034 "Reset recovery cid=0x%x, qedi_ep=%p, state=0x%x\n",
1035 qedi_ep->iscsi_cid, qedi_ep, qedi_ep->state);
1036 qedi_cleanup_active_cmd_list(qedi_conn);
1037 goto ep_release_conn;
1038 }
1039 }
1040
bd571195 1041 if (qedi_do_not_recover)
ace7f46b
MR		 1042 goto ep_exit_recover;
1043
1044 switch (qedi_ep->state) {
1045 case EP_STATE_OFLDCONN_START:
1046 goto ep_release_conn;
1047 case EP_STATE_OFLDCONN_FAILED:
1048 break;
1049 case EP_STATE_OFLDCONN_COMPL:
1050 if (unlikely(!qedi_conn))
1051 break;
1052
1053 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
1054 "Active cmd count=%d, abrt_conn=%d, ep state=0x%x, cid=0x%x, qedi_conn=%p\n",
1055 qedi_conn->active_cmd_count, abrt_conn,
1056 qedi_ep->state,
1057 qedi_ep->iscsi_cid,
1058 qedi_ep->conn
1059 );
1060
1061 if (!qedi_conn->active_cmd_count)
1062 abrt_conn = 0;
1063 else
1064 abrt_conn = 1;
1065
1066 if (abrt_conn)
1067 qedi_clearsq(qedi, qedi_conn, NULL);
1068 break;
1069 default:
1070 break;
1071 }
1072
1073 qedi_ep->state = EP_STATE_DISCONN_START;
1074 ret = qedi_ops->destroy_conn(qedi->cdev, qedi_ep->handle, abrt_conn);
1075 if (ret) {
1076 QEDI_WARN(&qedi->dbg_ctx,
1077 "destroy_conn failed returned %d\n", ret);
1078 } else {
1079 ret = wait_event_interruptible_timeout(
1080 qedi_ep->tcp_ofld_wait,
1081 (qedi_ep->state !=
1082 EP_STATE_DISCONN_START),
1083 wait_delay);
1084 if ((ret <= 0) || (qedi_ep->state == EP_STATE_DISCONN_START)) {
1085 QEDI_WARN(&qedi->dbg_ctx,
1086 "Destroy conn timedout or interrupted, ret=%d, delay=%d, cid=0x%x\n",
1087 ret, wait_delay, qedi_ep->iscsi_cid);
1088 }
1089 }
1090
1091ep_release_conn:
1092 ret = qedi_ops->release_conn(qedi->cdev, qedi_ep->handle);
1093 if (ret)
1094 QEDI_WARN(&qedi->dbg_ctx,
1095 "release_conn returned %d, cid=0x%x\n",
1096 ret, qedi_ep->iscsi_cid);
1097ep_exit_recover:
1098 qedi_ep->state = EP_STATE_IDLE;
1099 qedi->ep_tbl[qedi_ep->iscsi_cid] = NULL;
1100 qedi->cid_que.conn_cid_tbl[qedi_ep->iscsi_cid] = NULL;
1101 qedi_free_id(&qedi->lcl_port_tbl, qedi_ep->src_port);
1102 qedi_free_sq(qedi, qedi_ep);
1103
1104 if (qedi_conn)
1105 qedi_conn->ep = NULL;
1106
1107 qedi_ep->conn = NULL;
1108 qedi_ep->qedi = NULL;
1109 atomic_dec(&qedi->num_offloads);
1110
1111 iscsi_destroy_endpoint(ep);
1112}
1113
1114static int qedi_data_avail(struct qedi_ctx *qedi, u16 vlanid)
1115{
1116 struct qed_dev *cdev = qedi->cdev;
1117 struct qedi_uio_dev *udev;
1118 struct qedi_uio_ctrl *uctrl;
1119 struct sk_buff *skb;
1120 u32 len;
1121 int rc = 0;
1122
1123 udev = qedi->udev;
1124 if (!udev) {
1125 QEDI_ERR(&qedi->dbg_ctx, "udev is NULL.\n");
1126 return -EINVAL;
1127 }
1128
1129 uctrl = (struct qedi_uio_ctrl *)udev->uctrl;
1130 if (!uctrl) {
1131 QEDI_ERR(&qedi->dbg_ctx, "uctlr is NULL.\n");
1132 return -EINVAL;
1133 }
1134
1135 len = uctrl->host_tx_pkt_len;
1136 if (!len) {
1137 QEDI_ERR(&qedi->dbg_ctx, "Invalid len %u\n", len);
1138 return -EINVAL;
1139 }
1140
1141 skb = alloc_skb(len, GFP_ATOMIC);
1142 if (!skb) {
1143 QEDI_ERR(&qedi->dbg_ctx, "alloc_skb failed\n");
1144 return -EINVAL;
1145 }
1146
1147 skb_put(skb, len);
1148 memcpy(skb->data, udev->tx_pkt, len);
1149 skb->ip_summed = CHECKSUM_NONE;
1150
1151 if (vlanid)
1152 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlanid);
1153
1154 rc = qedi_ops->ll2->start_xmit(cdev, skb);
1155 if (rc) {
1156 QEDI_ERR(&qedi->dbg_ctx, "ll2 start_xmit returned %d\n",
1157 rc);
1158 kfree_skb(skb);
1159 }
1160
1161 uctrl->host_tx_pkt_len = 0;
1162 uctrl->hw_tx_cons++;
1163
1164 return rc;
1165}
1166
1167static void qedi_offload_work(struct work_struct *work)
1168{
1169 struct qedi_endpoint *qedi_ep =
1170 container_of(work, struct qedi_endpoint, offload_work);
1171 struct qedi_ctx *qedi;
1172 int wait_delay = 20 * HZ;
1173 int ret;
1174
1175 qedi = qedi_ep->qedi;
1176
1177 ret = qedi_iscsi_offload_conn(qedi_ep);
1178 if (ret) {
1179 QEDI_ERR(&qedi->dbg_ctx,
1180 "offload error: iscsi_cid=%u, qedi_ep=%p, ret=%d\n",
1181 qedi_ep->iscsi_cid, qedi_ep, ret);
1182 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1183 return;
1184 }
1185
1186 ret = wait_event_interruptible_timeout(qedi_ep->tcp_ofld_wait,
1187 (qedi_ep->state ==
1188 EP_STATE_OFLDCONN_COMPL),
1189 wait_delay);
1190 if ((ret <= 0) || (qedi_ep->state != EP_STATE_OFLDCONN_COMPL)) {
1191 qedi_ep->state = EP_STATE_OFLDCONN_FAILED;
1192 QEDI_ERR(&qedi->dbg_ctx,
1193 "Offload conn TIMEOUT iscsi_cid=%u, qedi_ep=%p\n",
1194 qedi_ep->iscsi_cid, qedi_ep);
1195 }
1196}
1197
1198static int qedi_set_path(struct Scsi_Host *shost, struct iscsi_path *path_data)
1199{
1200 struct qedi_ctx *qedi;
1201 struct qedi_endpoint *qedi_ep;
1202 int ret = 0;
1203 u32 iscsi_cid;
1204 u16 port_id = 0;
1205
1206 if (!shost) {
1207 ret = -ENXIO;
1208 QEDI_ERR(NULL, "shost is NULL\n");
1209 return ret;
1210 }
1211
1212 if (strcmp(shost->hostt->proc_name, "qedi")) {
1213 ret = -ENXIO;
1214 QEDI_ERR(NULL, "shost %s is invalid\n",
1215 shost->hostt->proc_name);
1216 return ret;
1217 }
1218
1219 qedi = iscsi_host_priv(shost);
1220 if (path_data->handle == QEDI_PATH_HANDLE) {
1221 ret = qedi_data_avail(qedi, path_data->vlan_id);
1222 goto set_path_exit;
1223 }
1224
1225 iscsi_cid = (u32)path_data->handle;
1226 qedi_ep = qedi->ep_tbl[iscsi_cid];
0ea9314f 1227 QEDI_INFO(&qedi->dbg_ctx, QEDI_LOG_INFO,
ace7f46b 1228 "iscsi_cid=0x%x, qedi_ep=%p\n", iscsi_cid, qedi_ep);
0ea9314f 1229 if (!qedi_ep) {
1230 ret = -EINVAL;
1231 goto set_path_exit;
1232 }
ace7f46b
MR		 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",
6dc618cd 1378 refcount_read(&task->refcount));
ace7f46b
MR		 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}