1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * This file is part of the Emulex Linux Device Driver for Enterprise iSCSI
4 * Host Bus Adapters. Refer to the README file included with this package
5 * for driver version and adapter compatibility.
6 *
7 * Copyright (c) 2018 Broadcom. All Rights Reserved.
8 * The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.
9 *
10 * Contact Information:
11 * linux-drivers@broadcom.com
12 */
13
14#include <scsi/libiscsi.h>
15#include <scsi/scsi_transport_iscsi.h>
16#include <scsi/scsi_transport.h>
17#include <scsi/scsi_cmnd.h>
18#include <scsi/scsi_device.h>
19#include <scsi/scsi_host.h>
20#include <scsi/scsi_netlink.h>
21#include <net/netlink.h>
22#include <scsi/scsi.h>
23
24#include "be_iscsi.h"
25
26extern struct iscsi_transport beiscsi_iscsi_transport;
27
28/**
29 * beiscsi_session_create - creates a new iscsi session
30 * @ep: pointer to iscsi ep
31 * @cmds_max: max commands supported
32 * @qdepth: max queue depth supported
33 * @initial_cmdsn: initial iscsi CMDSN
34 */
35struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
36 u16 cmds_max,
37 u16 qdepth,
38 u32 initial_cmdsn)
39{
40 struct Scsi_Host *shost;
41 struct beiscsi_endpoint *beiscsi_ep;
42 struct iscsi_cls_session *cls_session;
43 struct beiscsi_hba *phba;
44 struct iscsi_session *sess;
45 struct beiscsi_session *beiscsi_sess;
46 struct beiscsi_io_task *io_task;
47
48
49 if (!ep) {
50 pr_err("beiscsi_session_create: invalid ep\n");
51 return NULL;
52 }
53 beiscsi_ep = ep->dd_data;
54 phba = beiscsi_ep->phba;
55
56 if (!beiscsi_hba_is_online(phba)) {
57 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
58 "BS_%d : HBA in error 0x%lx\n", phba->state);
59 return NULL;
60 }
61
62 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
63 "BS_%d : In beiscsi_session_create\n");
64 if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
65 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
66 "BS_%d : Cannot handle %d cmds."
67 "Max cmds per session supported is %d. Using %d."
68 "\n", cmds_max,
69 beiscsi_ep->phba->params.wrbs_per_cxn,
70 beiscsi_ep->phba->params.wrbs_per_cxn);
71
72 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
73 }
74
75 shost = phba->shost;
76 cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
77 shost, cmds_max,
78 sizeof(*beiscsi_sess),
79 sizeof(*io_task),
80 initial_cmdsn, ISCSI_MAX_TARGET);
81 if (!cls_session)
82 return NULL;
83 sess = cls_session->dd_data;
84 beiscsi_sess = sess->dd_data;
85 beiscsi_sess->bhs_pool = dma_pool_create(name: "beiscsi_bhs_pool",
86 dev: &phba->pcidev->dev,
87 size: sizeof(struct be_cmd_bhs),
88 align: 64, allocation: 0);
89 if (!beiscsi_sess->bhs_pool)
90 goto destroy_sess;
91
92 return cls_session;
93destroy_sess:
94 iscsi_session_teardown(cls_session);
95 return NULL;
96}
97
98/**
99 * beiscsi_session_destroy - destroys iscsi session
100 * @cls_session: pointer to iscsi cls session
101 *
102 * Destroys iSCSI session instance and releases
103 * resources allocated for it.
104 */
105void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
106{
107 struct iscsi_session *sess = cls_session->dd_data;
108 struct beiscsi_session *beiscsi_sess = sess->dd_data;
109
110 printk(KERN_INFO "In beiscsi_session_destroy\n");
111 dma_pool_destroy(pool: beiscsi_sess->bhs_pool);
112 iscsi_session_teardown(cls_session);
113}
114
115/**
116 * beiscsi_session_fail(): Closing session with appropriate error
117 * @cls_session: ptr to session
118 **/
119void beiscsi_session_fail(struct iscsi_cls_session *cls_session)
120{
121 iscsi_session_failure(session: cls_session->dd_data, err: ISCSI_ERR_CONN_FAILED);
122}
123
124
125/**
126 * beiscsi_conn_create - create an instance of iscsi connection
127 * @cls_session: ptr to iscsi_cls_session
128 * @cid: iscsi cid
129 */
130struct iscsi_cls_conn *
131beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
132{
133 struct beiscsi_hba *phba;
134 struct Scsi_Host *shost;
135 struct iscsi_cls_conn *cls_conn;
136 struct beiscsi_conn *beiscsi_conn;
137 struct iscsi_conn *conn;
138 struct iscsi_session *sess;
139 struct beiscsi_session *beiscsi_sess;
140
141 shost = iscsi_session_to_shost(cls_session);
142 phba = iscsi_host_priv(shost);
143
144 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
145 "BS_%d : In beiscsi_conn_create ,cid"
146 "from iscsi layer=%d\n", cid);
147
148 cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
149 if (!cls_conn)
150 return NULL;
151
152 conn = cls_conn->dd_data;
153 beiscsi_conn = conn->dd_data;
154 beiscsi_conn->ep = NULL;
155 beiscsi_conn->phba = phba;
156 beiscsi_conn->conn = conn;
157 sess = cls_session->dd_data;
158 beiscsi_sess = sess->dd_data;
159 beiscsi_conn->beiscsi_sess = beiscsi_sess;
160 return cls_conn;
161}
162
163/**
164 * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
165 * @cls_session: pointer to iscsi cls session
166 * @cls_conn: pointer to iscsi cls conn
167 * @transport_fd: EP handle(64 bit)
168 * @is_leading: indicate if this is the session leading connection (MCS)
169 *
170 * This function binds the TCP Conn with iSCSI Connection and Session.
171 */
172int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
173 struct iscsi_cls_conn *cls_conn,
174 u64 transport_fd, int is_leading)
175{
176 struct iscsi_conn *conn = cls_conn->dd_data;
177 struct beiscsi_conn *beiscsi_conn = conn->dd_data;
178 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
179 struct beiscsi_hba *phba = iscsi_host_priv(shost);
180 struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
181 struct hwi_wrb_context *pwrb_context;
182 struct beiscsi_endpoint *beiscsi_ep;
183 struct iscsi_endpoint *ep;
184 uint16_t cri_index;
185 int rc = 0;
186
187 ep = iscsi_lookup_endpoint(handle: transport_fd);
188 if (!ep)
189 return -EINVAL;
190
191 beiscsi_ep = ep->dd_data;
192
193 if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) {
194 rc = -EINVAL;
195 goto put_ep;
196 }
197
198 if (beiscsi_ep->phba != phba) {
199 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
200 "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
201 beiscsi_ep->phba, phba);
202 rc = -EEXIST;
203 goto put_ep;
204 }
205 cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
206 if (phba->conn_table[cri_index]) {
207 if (beiscsi_conn != phba->conn_table[cri_index] ||
208 beiscsi_ep != phba->conn_table[cri_index]->ep) {
209 __beiscsi_log(phba, KERN_ERR,
210 "BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n",
211 cri_index,
212 beiscsi_ep->ep_cid,
213 beiscsi_conn,
214 phba->conn_table[cri_index]);
215 rc = -EINVAL;
216 goto put_ep;
217 }
218 }
219
220 beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
221 beiscsi_conn->ep = beiscsi_ep;
222 beiscsi_ep->conn = beiscsi_conn;
223 /**
224 * Each connection is associated with a WRBQ kept in wrb_context.
225 * Store doorbell offset for transmit path.
226 */
227 pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
228 beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
229 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
230 "BS_%d : cid %d phba->conn_table[%u]=%p\n",
231 beiscsi_ep->ep_cid, cri_index, beiscsi_conn);
232 phba->conn_table[cri_index] = beiscsi_conn;
233
234put_ep:
235 iscsi_put_endpoint(ep);
236 return rc;
237}
238
239static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba)
240{
241 if (phba->ipv4_iface)
242 return 0;
243
244 phba->ipv4_iface = iscsi_create_iface(shost: phba->shost,
245 t: &beiscsi_iscsi_transport,
246 ISCSI_IFACE_TYPE_IPV4,
247 iface_num: 0, dd_size: 0);
248 if (!phba->ipv4_iface) {
249 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
250 "BS_%d : Could not "
251 "create default IPv4 address.\n");
252 return -ENODEV;
253 }
254
255 return 0;
256}
257
258static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba)
259{
260 if (phba->ipv6_iface)
261 return 0;
262
263 phba->ipv6_iface = iscsi_create_iface(shost: phba->shost,
264 t: &beiscsi_iscsi_transport,
265 ISCSI_IFACE_TYPE_IPV6,
266 iface_num: 0, dd_size: 0);
267 if (!phba->ipv6_iface) {
268 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
269 "BS_%d : Could not "
270 "create default IPv6 address.\n");
271 return -ENODEV;
272 }
273
274 return 0;
275}
276
277void beiscsi_iface_create_default(struct beiscsi_hba *phba)
278{
279 struct be_cmd_get_if_info_resp *if_info;
280
281 if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, if_info: &if_info)) {
282 beiscsi_iface_create_ipv4(phba);
283 kfree(objp: if_info);
284 }
285
286 if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, if_info: &if_info)) {
287 beiscsi_iface_create_ipv6(phba);
288 kfree(objp: if_info);
289 }
290}
291
292void beiscsi_iface_destroy_default(struct beiscsi_hba *phba)
293{
294 if (phba->ipv6_iface) {
295 iscsi_destroy_iface(iface: phba->ipv6_iface);
296 phba->ipv6_iface = NULL;
297 }
298 if (phba->ipv4_iface) {
299 iscsi_destroy_iface(iface: phba->ipv4_iface);
300 phba->ipv4_iface = NULL;
301 }
302}
303
304/**
305 * beiscsi_iface_config_vlan()- Set the VLAN TAG
306 * @shost: Scsi Host for the driver instance
307 * @iface_param: Interface paramters
308 *
309 * Set the VLAN TAG for the adapter or disable
310 * the VLAN config
311 *
312 * returns
313 * Success: 0
314 * Failure: Non-Zero Value
315 **/
316static int
317beiscsi_iface_config_vlan(struct Scsi_Host *shost,
318 struct iscsi_iface_param_info *iface_param)
319{
320 struct beiscsi_hba *phba = iscsi_host_priv(shost);
321 int ret = -EPERM;
322
323 switch (iface_param->param) {
324 case ISCSI_NET_PARAM_VLAN_ENABLED:
325 ret = 0;
326 if (iface_param->value[0] != ISCSI_VLAN_ENABLE)
327 ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE);
328 break;
329 case ISCSI_NET_PARAM_VLAN_TAG:
330 ret = beiscsi_if_set_vlan(phba,
331 vlan_tag: *((uint16_t *)iface_param->value));
332 break;
333 }
334 return ret;
335}
336
337
338static int
339beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
340 struct iscsi_iface_param_info *info,
341 void *data, uint32_t dt_len)
342{
343 struct beiscsi_hba *phba = iscsi_host_priv(shost);
344 u8 *ip = NULL, *subnet = NULL, *gw;
345 struct nlattr *nla;
346 int ret = -EPERM;
347
348 /* Check the param */
349 switch (info->param) {
350 case ISCSI_NET_PARAM_IFACE_ENABLE:
351 if (info->value[0] == ISCSI_IFACE_ENABLE)
352 ret = beiscsi_iface_create_ipv4(phba);
353 else {
354 iscsi_destroy_iface(iface: phba->ipv4_iface);
355 phba->ipv4_iface = NULL;
356 }
357 break;
358 case ISCSI_NET_PARAM_IPV4_GW:
359 gw = info->value;
360 ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw);
361 break;
362 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
363 if (info->value[0] == ISCSI_BOOTPROTO_DHCP)
364 ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4);
365 else if (info->value[0] == ISCSI_BOOTPROTO_STATIC)
366 /* release DHCP IP address */
367 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
368 NULL, NULL);
369 else
370 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
371 "BS_%d : Invalid BOOTPROTO: %d\n",
372 info->value[0]);
373 break;
374 case ISCSI_NET_PARAM_IPV4_ADDR:
375 ip = info->value;
376 nla = nla_find(head: data, len: dt_len, attrtype: ISCSI_NET_PARAM_IPV4_SUBNET);
377 if (nla) {
378 info = nla_data(nla);
379 subnet = info->value;
380 }
381 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
382 ip, subnet);
383 break;
384 case ISCSI_NET_PARAM_IPV4_SUBNET:
385 /*
386 * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP
387 * and subnet both. Find IP to be applied for this subnet.
388 */
389 subnet = info->value;
390 nla = nla_find(head: data, len: dt_len, attrtype: ISCSI_NET_PARAM_IPV4_ADDR);
391 if (nla) {
392 info = nla_data(nla);
393 ip = info->value;
394 }
395 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
396 ip, subnet);
397 break;
398 }
399
400 return ret;
401}
402
403static int
404beiscsi_iface_config_ipv6(struct Scsi_Host *shost,
405 struct iscsi_iface_param_info *iface_param,
406 void *data, uint32_t dt_len)
407{
408 struct beiscsi_hba *phba = iscsi_host_priv(shost);
409 int ret = -EPERM;
410
411 switch (iface_param->param) {
412 case ISCSI_NET_PARAM_IFACE_ENABLE:
413 if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
414 ret = beiscsi_iface_create_ipv6(phba);
415 else {
416 iscsi_destroy_iface(iface: phba->ipv6_iface);
417 phba->ipv6_iface = NULL;
418 }
419 break;
420 case ISCSI_NET_PARAM_IPV6_ADDR:
421 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6,
422 ip: iface_param->value, NULL);
423 break;
424 }
425
426 return ret;
427}
428
429int beiscsi_iface_set_param(struct Scsi_Host *shost,
430 void *data, uint32_t dt_len)
431{
432 struct iscsi_iface_param_info *iface_param = NULL;
433 struct beiscsi_hba *phba = iscsi_host_priv(shost);
434 struct nlattr *attrib;
435 uint32_t rm_len = dt_len;
436 int ret;
437
438 if (!beiscsi_hba_is_online(phba)) {
439 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
440 "BS_%d : HBA in error 0x%lx\n", phba->state);
441 return -EBUSY;
442 }
443
444 /* update interface_handle */
445 ret = beiscsi_if_get_handle(phba);
446 if (ret) {
447 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
448 "BS_%d : Getting Interface Handle Failed\n");
449 return ret;
450 }
451
452 nla_for_each_attr(attrib, data, dt_len, rm_len) {
453 /* ignore nla_type as it is never used */
454 if (nla_len(nla: attrib) < sizeof(*iface_param))
455 return -EINVAL;
456
457 iface_param = nla_data(nla: attrib);
458
459 if (iface_param->param_type != ISCSI_NET_PARAM)
460 continue;
461
462 /*
463 * BE2ISCSI only supports 1 interface
464 */
465 if (iface_param->iface_num) {
466 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
467 "BS_%d : Invalid iface_num %d."
468 "Only iface_num 0 is supported.\n",
469 iface_param->iface_num);
470
471 return -EINVAL;
472 }
473
474 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
475 "BS_%d : %s.0 set param %d",
476 (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ?
477 "ipv4" : "ipv6", iface_param->param);
478
479 ret = -EPERM;
480 switch (iface_param->param) {
481 case ISCSI_NET_PARAM_VLAN_ENABLED:
482 case ISCSI_NET_PARAM_VLAN_TAG:
483 ret = beiscsi_iface_config_vlan(shost, iface_param);
484 break;
485 default:
486 switch (iface_param->iface_type) {
487 case ISCSI_IFACE_TYPE_IPV4:
488 ret = beiscsi_iface_config_ipv4(shost,
489 info: iface_param,
490 data, dt_len);
491 break;
492 case ISCSI_IFACE_TYPE_IPV6:
493 ret = beiscsi_iface_config_ipv6(shost,
494 iface_param,
495 data, dt_len);
496 break;
497 }
498 }
499
500 if (ret == -EPERM) {
501 __beiscsi_log(phba, KERN_ERR,
502 "BS_%d : %s.0 set param %d not permitted",
503 (iface_param->iface_type ==
504 ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6",
505 iface_param->param);
506 ret = 0;
507 }
508 if (ret)
509 break;
510 }
511
512 return ret;
513}
514
515static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
516 struct iscsi_iface *iface,
517 int param, char *buf)
518{
519 struct be_cmd_get_if_info_resp *if_info;
520 int len, ip_type = BEISCSI_IP_TYPE_V4;
521
522 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
523 ip_type = BEISCSI_IP_TYPE_V6;
524
525 len = beiscsi_if_get_info(phba, ip_type, if_info: &if_info);
526 if (len)
527 return len;
528
529 switch (param) {
530 case ISCSI_NET_PARAM_IPV4_ADDR:
531 len = sprintf(buf, fmt: "%pI4\n", if_info->ip_addr.addr);
532 break;
533 case ISCSI_NET_PARAM_IPV6_ADDR:
534 len = sprintf(buf, fmt: "%pI6\n", if_info->ip_addr.addr);
535 break;
536 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
537 if (!if_info->dhcp_state)
538 len = sprintf(buf, fmt: "static\n");
539 else
540 len = sprintf(buf, fmt: "dhcp\n");
541 break;
542 case ISCSI_NET_PARAM_IPV4_SUBNET:
543 len = sprintf(buf, fmt: "%pI4\n", if_info->ip_addr.subnet_mask);
544 break;
545 case ISCSI_NET_PARAM_VLAN_ENABLED:
546 len = sprintf(buf, fmt: "%s\n",
547 (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ?
548 "disable" : "enable");
549 break;
550 case ISCSI_NET_PARAM_VLAN_ID:
551 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
552 len = -EINVAL;
553 else
554 len = sprintf(buf, fmt: "%d\n",
555 (if_info->vlan_priority &
556 ISCSI_MAX_VLAN_ID));
557 break;
558 case ISCSI_NET_PARAM_VLAN_PRIORITY:
559 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
560 len = -EINVAL;
561 else
562 len = sprintf(buf, fmt: "%d\n",
563 ((if_info->vlan_priority >> 13) &
564 ISCSI_MAX_VLAN_PRIORITY));
565 break;
566 default:
567 WARN_ON(1);
568 }
569
570 kfree(objp: if_info);
571 return len;
572}
573
574int beiscsi_iface_get_param(struct iscsi_iface *iface,
575 enum iscsi_param_type param_type,
576 int param, char *buf)
577{
578 struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
579 struct beiscsi_hba *phba = iscsi_host_priv(shost);
580 struct be_cmd_get_def_gateway_resp gateway;
581 int len = -EPERM;
582
583 if (param_type != ISCSI_NET_PARAM)
584 return 0;
585 if (!beiscsi_hba_is_online(phba)) {
586 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
587 "BS_%d : HBA in error 0x%lx\n", phba->state);
588 return -EBUSY;
589 }
590
591 switch (param) {
592 case ISCSI_NET_PARAM_IPV4_ADDR:
593 case ISCSI_NET_PARAM_IPV4_SUBNET:
594 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
595 case ISCSI_NET_PARAM_IPV6_ADDR:
596 case ISCSI_NET_PARAM_VLAN_ENABLED:
597 case ISCSI_NET_PARAM_VLAN_ID:
598 case ISCSI_NET_PARAM_VLAN_PRIORITY:
599 len = __beiscsi_iface_get_param(phba, iface, param, buf);
600 break;
601 case ISCSI_NET_PARAM_IFACE_ENABLE:
602 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
603 len = sprintf(buf, fmt: "%s\n",
604 phba->ipv4_iface ? "enable" : "disable");
605 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
606 len = sprintf(buf, fmt: "%s\n",
607 phba->ipv6_iface ? "enable" : "disable");
608 break;
609 case ISCSI_NET_PARAM_IPV4_GW:
610 memset(&gateway, 0, sizeof(gateway));
611 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, resp: &gateway);
612 if (!len)
613 len = sprintf(buf, fmt: "%pI4\n", &gateway.ip_addr.addr);
614 break;
615 }
616
617 return len;
618}
619
620/**
621 * beiscsi_ep_get_param - get the iscsi parameter
622 * @ep: pointer to iscsi ep
623 * @param: parameter type identifier
624 * @buf: buffer pointer
625 *
626 * returns iscsi parameter
627 */
628int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
629 enum iscsi_param param, char *buf)
630{
631 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
632 int len;
633
634 beiscsi_log(beiscsi_ep->phba, KERN_INFO,
635 BEISCSI_LOG_CONFIG,
636 "BS_%d : In beiscsi_ep_get_param,"
637 " param= %d\n", param);
638
639 switch (param) {
640 case ISCSI_PARAM_CONN_PORT:
641 len = sprintf(buf, fmt: "%hu\n", beiscsi_ep->dst_tcpport);
642 break;
643 case ISCSI_PARAM_CONN_ADDRESS:
644 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
645 len = sprintf(buf, fmt: "%pI4\n", &beiscsi_ep->dst_addr);
646 else
647 len = sprintf(buf, fmt: "%pI6\n", &beiscsi_ep->dst6_addr);
648 break;
649 default:
650 len = -EPERM;
651 }
652 return len;
653}
654
655int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
656 enum iscsi_param param, char *buf, int buflen)
657{
658 struct iscsi_conn *conn = cls_conn->dd_data;
659 struct iscsi_session *session = conn->session;
660 struct beiscsi_hba *phba = NULL;
661 int ret;
662
663 phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
664 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
665 "BS_%d : In beiscsi_conn_set_param,"
666 " param= %d\n", param);
667
668 ret = iscsi_set_param(cls_conn, param, buf, buflen);
669 if (ret)
670 return ret;
671 /*
672 * If userspace tried to set the value to higher than we can
673 * support override here.
674 */
675 switch (param) {
676 case ISCSI_PARAM_FIRST_BURST:
677 if (session->first_burst > 8192)
678 session->first_burst = 8192;
679 break;
680 case ISCSI_PARAM_MAX_RECV_DLENGTH:
681 if (conn->max_recv_dlength > 65536)
682 conn->max_recv_dlength = 65536;
683 break;
684 case ISCSI_PARAM_MAX_BURST:
685 if (session->max_burst > 262144)
686 session->max_burst = 262144;
687 break;
688 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
689 if (conn->max_xmit_dlength > 65536)
690 conn->max_xmit_dlength = 65536;
691 fallthrough;
692 default:
693 return 0;
694 }
695
696 return 0;
697}
698
699/**
700 * beiscsi_get_port_state - Get the Port State
701 * @shost : pointer to scsi_host structure
702 *
703 */
704static void beiscsi_get_port_state(struct Scsi_Host *shost)
705{
706 struct beiscsi_hba *phba = iscsi_host_priv(shost);
707 struct iscsi_cls_host *ihost = shost->shost_data;
708
709 ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ?
710 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN;
711}
712
713/**
714 * beiscsi_get_port_speed - Get the Port Speed from Adapter
715 * @shost : pointer to scsi_host structure
716 *
717 */
718static void beiscsi_get_port_speed(struct Scsi_Host *shost)
719{
720 struct beiscsi_hba *phba = iscsi_host_priv(shost);
721 struct iscsi_cls_host *ihost = shost->shost_data;
722
723 switch (phba->port_speed) {
724 case BE2ISCSI_LINK_SPEED_10MBPS:
725 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS;
726 break;
727 case BE2ISCSI_LINK_SPEED_100MBPS:
728 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS;
729 break;
730 case BE2ISCSI_LINK_SPEED_1GBPS:
731 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS;
732 break;
733 case BE2ISCSI_LINK_SPEED_10GBPS:
734 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS;
735 break;
736 case BE2ISCSI_LINK_SPEED_25GBPS:
737 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS;
738 break;
739 case BE2ISCSI_LINK_SPEED_40GBPS:
740 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS;
741 break;
742 default:
743 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN;
744 }
745}
746
747/**
748 * beiscsi_get_host_param - get the iscsi parameter
749 * @shost: pointer to scsi_host structure
750 * @param: parameter type identifier
751 * @buf: buffer pointer
752 *
753 */
754int beiscsi_get_host_param(struct Scsi_Host *shost,
755 enum iscsi_host_param param, char *buf)
756{
757 struct beiscsi_hba *phba = iscsi_host_priv(shost);
758 int status = 0;
759
760 if (!beiscsi_hba_is_online(phba)) {
761 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
762 "BS_%d : HBA in error 0x%lx\n", phba->state);
763 return 0;
764 }
765 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
766 "BS_%d : In beiscsi_get_host_param, param = %d\n", param);
767
768 switch (param) {
769 case ISCSI_HOST_PARAM_HWADDRESS:
770 status = beiscsi_get_macaddr(buf, phba);
771 if (status < 0) {
772 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
773 "BS_%d : beiscsi_get_macaddr Failed\n");
774 return 0;
775 }
776 break;
777 case ISCSI_HOST_PARAM_INITIATOR_NAME:
778 /* try fetching user configured name first */
779 status = beiscsi_get_initiator_name(phba, name: buf, cfg: true);
780 if (status < 0) {
781 status = beiscsi_get_initiator_name(phba, name: buf, cfg: false);
782 if (status < 0) {
783 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
784 "BS_%d : Retrieving Initiator Name Failed\n");
785 status = 0;
786 }
787 }
788 break;
789 case ISCSI_HOST_PARAM_PORT_STATE:
790 beiscsi_get_port_state(shost);
791 status = sprintf(buf, fmt: "%s\n", iscsi_get_port_state_name(shost));
792 break;
793 case ISCSI_HOST_PARAM_PORT_SPEED:
794 beiscsi_get_port_speed(shost);
795 status = sprintf(buf, fmt: "%s\n", iscsi_get_port_speed_name(shost));
796 break;
797 default:
798 return iscsi_host_get_param(shost, param, buf);
799 }
800 return status;
801}
802
803int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
804{
805 struct be_cmd_get_nic_conf_resp resp;
806 int rc;
807
808 if (phba->mac_addr_set)
809 return sysfs_format_mac(buf, addr: phba->mac_address, ETH_ALEN);
810
811 memset(&resp, 0, sizeof(resp));
812 rc = mgmt_get_nic_conf(phba, mac: &resp);
813 if (rc)
814 return rc;
815
816 phba->mac_addr_set = true;
817 memcpy(phba->mac_address, resp.mac_address, ETH_ALEN);
818 return sysfs_format_mac(buf, addr: phba->mac_address, ETH_ALEN);
819}
820
821/**
822 * beiscsi_conn_get_stats - get the iscsi stats
823 * @cls_conn: pointer to iscsi cls conn
824 * @stats: pointer to iscsi_stats structure
825 *
826 * returns iscsi stats
827 */
828void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
829 struct iscsi_stats *stats)
830{
831 struct iscsi_conn *conn = cls_conn->dd_data;
832 struct beiscsi_hba *phba = NULL;
833
834 phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
835 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
836 "BS_%d : In beiscsi_conn_get_stats\n");
837
838 stats->txdata_octets = conn->txdata_octets;
839 stats->rxdata_octets = conn->rxdata_octets;
840 stats->dataout_pdus = conn->dataout_pdus_cnt;
841 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
842 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
843 stats->datain_pdus = conn->datain_pdus_cnt;
844 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
845 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
846 stats->r2t_pdus = conn->r2t_pdus_cnt;
847 stats->digest_err = 0;
848 stats->timeout_err = 0;
849 stats->custom_length = 1;
850 strcpy(p: stats->custom[0].desc, q: "eh_abort_cnt");
851 stats->custom[0].value = conn->eh_abort_cnt;
852}
853
854/**
855 * beiscsi_set_params_for_offld - get the parameters for offload
856 * @beiscsi_conn: pointer to beiscsi_conn
857 * @params: pointer to offload_params structure
858 */
859static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
860 struct beiscsi_offload_params *params)
861{
862 struct iscsi_conn *conn = beiscsi_conn->conn;
863 struct iscsi_session *session = conn->session;
864
865 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
866 params, session->max_burst);
867 AMAP_SET_BITS(struct amap_beiscsi_offload_params,
868 max_send_data_segment_length, params,
869 conn->max_xmit_dlength);
870 AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
871 params, session->first_burst);
872 AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
873 session->erl);
874 AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
875 conn->datadgst_en);
876 AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
877 conn->hdrdgst_en);
878 AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
879 session->initial_r2t_en);
880 AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
881 session->imm_data_en);
882 AMAP_SET_BITS(struct amap_beiscsi_offload_params,
883 data_seq_inorder, params,
884 session->dataseq_inorder_en);
885 AMAP_SET_BITS(struct amap_beiscsi_offload_params,
886 pdu_seq_inorder, params,
887 session->pdu_inorder_en);
888 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params,
889 session->max_r2t);
890 AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
891 (conn->exp_statsn - 1));
892 AMAP_SET_BITS(struct amap_beiscsi_offload_params,
893 max_recv_data_segment_length, params,
894 conn->max_recv_dlength);
895
896}
897
898/**
899 * beiscsi_conn_start - offload of session to chip
900 * @cls_conn: pointer to beiscsi_conn
901 */
902int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
903{
904 struct iscsi_conn *conn = cls_conn->dd_data;
905 struct beiscsi_conn *beiscsi_conn = conn->dd_data;
906 struct beiscsi_endpoint *beiscsi_ep;
907 struct beiscsi_offload_params params;
908 struct beiscsi_hba *phba;
909
910 phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
911
912 if (!beiscsi_hba_is_online(phba)) {
913 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
914 "BS_%d : HBA in error 0x%lx\n", phba->state);
915 return -EBUSY;
916 }
917 beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
918 "BS_%d : In beiscsi_conn_start\n");
919
920 memset(&params, 0, sizeof(struct beiscsi_offload_params));
921 beiscsi_ep = beiscsi_conn->ep;
922 if (!beiscsi_ep)
923 beiscsi_log(beiscsi_conn->phba, KERN_ERR,
924 BEISCSI_LOG_CONFIG,
925 "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n");
926
927 beiscsi_conn->login_in_progress = 0;
928 beiscsi_set_params_for_offld(beiscsi_conn, params: &params);
929 beiscsi_offload_connection(beiscsi_conn, params: &params);
930 iscsi_conn_start(cls_conn);
931 return 0;
932}
933
934/**
935 * beiscsi_get_cid - Allocate a cid
936 * @phba: The phba instance
937 */
938static int beiscsi_get_cid(struct beiscsi_hba *phba)
939{
940 uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1;
941 unsigned short cid, cid_from_ulp;
942 struct ulp_cid_info *cid_info;
943
944 /* Find the ULP which has more CID available */
945 cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ?
946 BEISCSI_ULP0_AVLBL_CID(phba) : 0;
947 cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ?
948 BEISCSI_ULP1_AVLBL_CID(phba) : 0;
949 cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ?
950 BEISCSI_ULP0 : BEISCSI_ULP1;
951 /**
952 * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp
953 * is ZERO for both, ULP 1 is returned.
954 * Check if ULP is loaded before getting new CID.
955 */
956 if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported))
957 return BE_INVALID_CID;
958
959 cid_info = phba->cid_array_info[cid_from_ulp];
960 cid = cid_info->cid_array[cid_info->cid_alloc];
961 if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) {
962 __beiscsi_log(phba, KERN_ERR,
963 "BS_%d : failed to get cid: available %u:%u\n",
964 cid_info->avlbl_cids, cid_info->cid_free);
965 return BE_INVALID_CID;
966 }
967 /* empty the slot */
968 cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID;
969 if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp))
970 cid_info->cid_alloc = 0;
971 cid_info->avlbl_cids--;
972 return cid;
973}
974
975/**
976 * beiscsi_put_cid - Free the cid
977 * @phba: The phba for which the cid is being freed
978 * @cid: The cid to free
979 */
980static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
981{
982 uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
983 struct hwi_wrb_context *pwrb_context;
984 struct hwi_controller *phwi_ctrlr;
985 struct ulp_cid_info *cid_info;
986 uint16_t cid_post_ulp;
987
988 phwi_ctrlr = phba->phwi_ctrlr;
989 pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
990 cid_post_ulp = pwrb_context->ulp_num;
991
992 cid_info = phba->cid_array_info[cid_post_ulp];
993 /* fill only in empty slot */
994 if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) {
995 __beiscsi_log(phba, KERN_ERR,
996 "BS_%d : failed to put cid %u: available %u:%u\n",
997 cid, cid_info->avlbl_cids, cid_info->cid_free);
998 return;
999 }
1000 cid_info->cid_array[cid_info->cid_free++] = cid;
1001 if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp))
1002 cid_info->cid_free = 0;
1003 cid_info->avlbl_cids++;
1004}
1005
1006/**
1007 * beiscsi_free_ep - free endpoint
1008 * @beiscsi_ep: pointer to device endpoint struct
1009 */
1010static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
1011{
1012 struct beiscsi_hba *phba = beiscsi_ep->phba;
1013 struct beiscsi_conn *beiscsi_conn;
1014
1015 beiscsi_put_cid(phba, cid: beiscsi_ep->ep_cid);
1016 beiscsi_ep->phba = NULL;
1017 /* clear this to track freeing in beiscsi_ep_disconnect */
1018 phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL;
1019
1020 /**
1021 * Check if any connection resource allocated by driver
1022 * is to be freed.This case occurs when target redirection
1023 * or connection retry is done.
1024 **/
1025 if (!beiscsi_ep->conn)
1026 return;
1027
1028 beiscsi_conn = beiscsi_ep->conn;
1029 /**
1030 * Break ep->conn link here so that completions after
1031 * this are ignored.
1032 */
1033 beiscsi_ep->conn = NULL;
1034 if (beiscsi_conn->login_in_progress) {
1035 beiscsi_free_mgmt_task_handles(beiscsi_conn,
1036 task: beiscsi_conn->task);
1037 beiscsi_conn->login_in_progress = 0;
1038 }
1039}
1040
1041/**
1042 * beiscsi_open_conn - Ask FW to open a TCP connection
1043 * @ep: pointer to device endpoint struct
1044 * @src_addr: The source IP address
1045 * @dst_addr: The Destination IP address
1046 * @non_blocking: blocking or non-blocking call
1047 *
1048 * Asks the FW to open a TCP connection
1049 */
1050static int beiscsi_open_conn(struct iscsi_endpoint *ep,
1051 struct sockaddr *src_addr,
1052 struct sockaddr *dst_addr, int non_blocking)
1053{
1054 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1055 struct beiscsi_hba *phba = beiscsi_ep->phba;
1056 struct tcp_connect_and_offload_out *ptcpcnct_out;
1057 struct be_dma_mem nonemb_cmd;
1058 unsigned int tag, req_memsize;
1059 int ret = -ENOMEM;
1060
1061 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1062 "BS_%d : In beiscsi_open_conn\n");
1063
1064 beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
1065 if (beiscsi_ep->ep_cid == BE_INVALID_CID) {
1066 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1067 "BS_%d : No free cid available\n");
1068 return ret;
1069 }
1070
1071 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1072 "BS_%d : In beiscsi_open_conn, ep_cid=%d\n",
1073 beiscsi_ep->ep_cid);
1074
1075 phba->ep_array[BE_GET_CRI_FROM_CID
1076 (beiscsi_ep->ep_cid)] = ep;
1077
1078 beiscsi_ep->cid_vld = 0;
1079
1080 if (is_chip_be2_be3r(phba))
1081 req_memsize = sizeof(struct tcp_connect_and_offload_in);
1082 else
1083 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1);
1084
1085 nonemb_cmd.va = dma_alloc_coherent(dev: &phba->ctrl.pdev->dev,
1086 size: req_memsize,
1087 dma_handle: &nonemb_cmd.dma, GFP_KERNEL);
1088 if (nonemb_cmd.va == NULL) {
1089
1090 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1091 "BS_%d : Failed to allocate memory for"
1092 " mgmt_open_connection\n");
1093
1094 beiscsi_free_ep(beiscsi_ep);
1095 return -ENOMEM;
1096 }
1097 nonemb_cmd.size = req_memsize;
1098 memset(nonemb_cmd.va, 0, nonemb_cmd.size);
1099 tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, nonemb_cmd: &nonemb_cmd);
1100 if (!tag) {
1101 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1102 "BS_%d : mgmt_open_connection Failed for cid=%d\n",
1103 beiscsi_ep->ep_cid);
1104
1105 dma_free_coherent(dev: &phba->ctrl.pdev->dev, size: nonemb_cmd.size,
1106 cpu_addr: nonemb_cmd.va, dma_handle: nonemb_cmd.dma);
1107 beiscsi_free_ep(beiscsi_ep);
1108 return -EAGAIN;
1109 }
1110
1111 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, mbx_cmd_mem: &nonemb_cmd);
1112 if (ret) {
1113 beiscsi_log(phba, KERN_ERR,
1114 BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
1115 "BS_%d : mgmt_open_connection Failed");
1116
1117 if (ret != -EBUSY)
1118 dma_free_coherent(dev: &phba->ctrl.pdev->dev,
1119 size: nonemb_cmd.size, cpu_addr: nonemb_cmd.va,
1120 dma_handle: nonemb_cmd.dma);
1121
1122 beiscsi_free_ep(beiscsi_ep);
1123 return ret;
1124 }
1125
1126 ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va;
1127 beiscsi_ep = ep->dd_data;
1128 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
1129 beiscsi_ep->cid_vld = 1;
1130 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1131 "BS_%d : mgmt_open_connection Success\n");
1132
1133 dma_free_coherent(dev: &phba->ctrl.pdev->dev, size: nonemb_cmd.size,
1134 cpu_addr: nonemb_cmd.va, dma_handle: nonemb_cmd.dma);
1135 return 0;
1136}
1137
1138/**
1139 * beiscsi_ep_connect - Ask chip to create TCP Conn
1140 * @shost: Pointer to scsi_host structure
1141 * @dst_addr: The IP address of Target
1142 * @non_blocking: blocking or non-blocking call
1143 *
1144 * This routines first asks chip to create a connection and then allocates an EP
1145 */
1146struct iscsi_endpoint *
1147beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
1148 int non_blocking)
1149{
1150 struct beiscsi_hba *phba;
1151 struct beiscsi_endpoint *beiscsi_ep;
1152 struct iscsi_endpoint *ep;
1153 int ret;
1154
1155 if (!shost) {
1156 ret = -ENXIO;
1157 pr_err("beiscsi_ep_connect shost is NULL\n");
1158 return ERR_PTR(error: ret);
1159 }
1160
1161 phba = iscsi_host_priv(shost);
1162 if (!beiscsi_hba_is_online(phba)) {
1163 ret = -EIO;
1164 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1165 "BS_%d : HBA in error 0x%lx\n", phba->state);
1166 return ERR_PTR(error: ret);
1167 }
1168 if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) {
1169 ret = -EBUSY;
1170 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
1171 "BS_%d : The Adapter Port state is Down!!!\n");
1172 return ERR_PTR(error: ret);
1173 }
1174
1175 ep = iscsi_create_endpoint(dd_size: sizeof(struct beiscsi_endpoint));
1176 if (!ep) {
1177 ret = -ENOMEM;
1178 return ERR_PTR(error: ret);
1179 }
1180
1181 beiscsi_ep = ep->dd_data;
1182 beiscsi_ep->phba = phba;
1183 beiscsi_ep->openiscsi_ep = ep;
1184 ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
1185 if (ret) {
1186 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1187 "BS_%d : Failed in beiscsi_open_conn\n");
1188 goto free_ep;
1189 }
1190
1191 return ep;
1192
1193free_ep:
1194 iscsi_destroy_endpoint(ep);
1195 return ERR_PTR(error: ret);
1196}
1197
1198/**
1199 * beiscsi_ep_poll - Poll to see if connection is established
1200 * @ep: endpoint to be used
1201 * @timeout_ms: timeout specified in millisecs
1202 *
1203 * Poll to see if TCP connection established
1204 */
1205int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1206{
1207 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1208
1209 beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1210 "BS_%d : In beiscsi_ep_poll\n");
1211
1212 if (beiscsi_ep->cid_vld == 1)
1213 return 1;
1214 else
1215 return 0;
1216}
1217
1218/**
1219 * beiscsi_flush_cq()- Flush the CQ created.
1220 * @phba: ptr device priv structure.
1221 *
1222 * Before the connection resource are freed flush
1223 * all the CQ enteries
1224 **/
1225static void beiscsi_flush_cq(struct beiscsi_hba *phba)
1226{
1227 uint16_t i;
1228 struct be_eq_obj *pbe_eq;
1229 struct hwi_controller *phwi_ctrlr;
1230 struct hwi_context_memory *phwi_context;
1231
1232 phwi_ctrlr = phba->phwi_ctrlr;
1233 phwi_context = phwi_ctrlr->phwi_ctxt;
1234
1235 for (i = 0; i < phba->num_cpus; i++) {
1236 pbe_eq = &phwi_context->be_eq[i];
1237 irq_poll_disable(&pbe_eq->iopoll);
1238 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC);
1239 irq_poll_enable(&pbe_eq->iopoll);
1240 }
1241}
1242
1243/**
1244 * beiscsi_conn_close - Invalidate and upload connection
1245 * @beiscsi_ep: pointer to device endpoint struct
1246 *
1247 * Returns 0 on success, -1 on failure.
1248 */
1249static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep)
1250{
1251 struct beiscsi_hba *phba = beiscsi_ep->phba;
1252 unsigned int tag, attempts;
1253 int ret;
1254
1255 /**
1256 * Without successfully invalidating and uploading connection
1257 * driver can't reuse the CID so attempt more than once.
1258 */
1259 attempts = 0;
1260 while (attempts++ < 3) {
1261 tag = beiscsi_invalidate_cxn(phba, beiscsi_ep);
1262 if (tag) {
1263 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1264 if (!ret)
1265 break;
1266 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1267 "BS_%d : invalidate conn failed cid %d\n",
1268 beiscsi_ep->ep_cid);
1269 }
1270 }
1271
1272 /* wait for all completions to arrive, then process them */
1273 msleep(msecs: 250);
1274 /* flush CQ entries */
1275 beiscsi_flush_cq(phba);
1276
1277 if (attempts > 3)
1278 return -1;
1279
1280 attempts = 0;
1281 while (attempts++ < 3) {
1282 tag = beiscsi_upload_cxn(phba, beiscsi_ep);
1283 if (tag) {
1284 ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1285 if (!ret)
1286 break;
1287 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1288 "BS_%d : upload conn failed cid %d\n",
1289 beiscsi_ep->ep_cid);
1290 }
1291 }
1292 if (attempts > 3)
1293 return -1;
1294
1295 return 0;
1296}
1297
1298/**
1299 * beiscsi_ep_disconnect - Tears down the TCP connection
1300 * @ep: endpoint to be used
1301 *
1302 * Tears down the TCP connection
1303 */
1304void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
1305{
1306 struct beiscsi_endpoint *beiscsi_ep;
1307 struct beiscsi_hba *phba;
1308 uint16_t cri_index;
1309
1310 beiscsi_ep = ep->dd_data;
1311 phba = beiscsi_ep->phba;
1312 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1313 "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n",
1314 beiscsi_ep->ep_cid);
1315
1316 cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
1317 if (!phba->ep_array[cri_index]) {
1318 __beiscsi_log(phba, KERN_ERR,
1319 "BS_%d : ep_array at %u cid %u empty\n",
1320 cri_index,
1321 beiscsi_ep->ep_cid);
1322 return;
1323 }
1324
1325 if (!beiscsi_hba_is_online(phba)) {
1326 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1327 "BS_%d : HBA in error 0x%lx\n", phba->state);
1328 } else {
1329 /**
1330 * Make CID available even if close fails.
1331 * If not freed, FW might fail open using the CID.
1332 */
1333 if (beiscsi_conn_close(beiscsi_ep) < 0)
1334 __beiscsi_log(phba, KERN_ERR,
1335 "BS_%d : close conn failed cid %d\n",
1336 beiscsi_ep->ep_cid);
1337 }
1338
1339 beiscsi_free_ep(beiscsi_ep);
1340 if (!phba->conn_table[cri_index])
1341 __beiscsi_log(phba, KERN_ERR,
1342 "BS_%d : conn_table empty at %u: cid %u\n",
1343 cri_index, beiscsi_ep->ep_cid);
1344 phba->conn_table[cri_index] = NULL;
1345 iscsi_destroy_endpoint(ep: beiscsi_ep->openiscsi_ep);
1346}
1347
1348umode_t beiscsi_attr_is_visible(int param_type, int param)
1349{
1350 switch (param_type) {
1351 case ISCSI_NET_PARAM:
1352 switch (param) {
1353 case ISCSI_NET_PARAM_IFACE_ENABLE:
1354 case ISCSI_NET_PARAM_IPV4_ADDR:
1355 case ISCSI_NET_PARAM_IPV4_SUBNET:
1356 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
1357 case ISCSI_NET_PARAM_IPV4_GW:
1358 case ISCSI_NET_PARAM_IPV6_ADDR:
1359 case ISCSI_NET_PARAM_VLAN_ID:
1360 case ISCSI_NET_PARAM_VLAN_PRIORITY:
1361 case ISCSI_NET_PARAM_VLAN_ENABLED:
1362 return S_IRUGO;
1363 default:
1364 return 0;
1365 }
1366 case ISCSI_HOST_PARAM:
1367 switch (param) {
1368 case ISCSI_HOST_PARAM_HWADDRESS:
1369 case ISCSI_HOST_PARAM_INITIATOR_NAME:
1370 case ISCSI_HOST_PARAM_PORT_STATE:
1371 case ISCSI_HOST_PARAM_PORT_SPEED:
1372 return S_IRUGO;
1373 default:
1374 return 0;
1375 }
1376 case ISCSI_PARAM:
1377 switch (param) {
1378 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1379 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1380 case ISCSI_PARAM_HDRDGST_EN:
1381 case ISCSI_PARAM_DATADGST_EN:
1382 case ISCSI_PARAM_CONN_ADDRESS:
1383 case ISCSI_PARAM_CONN_PORT:
1384 case ISCSI_PARAM_EXP_STATSN:
1385 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1386 case ISCSI_PARAM_PERSISTENT_PORT:
1387 case ISCSI_PARAM_PING_TMO:
1388 case ISCSI_PARAM_RECV_TMO:
1389 case ISCSI_PARAM_INITIAL_R2T_EN:
1390 case ISCSI_PARAM_MAX_R2T:
1391 case ISCSI_PARAM_IMM_DATA_EN:
1392 case ISCSI_PARAM_FIRST_BURST:
1393 case ISCSI_PARAM_MAX_BURST:
1394 case ISCSI_PARAM_PDU_INORDER_EN:
1395 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1396 case ISCSI_PARAM_ERL:
1397 case ISCSI_PARAM_TARGET_NAME:
1398 case ISCSI_PARAM_TPGT:
1399 case ISCSI_PARAM_USERNAME:
1400 case ISCSI_PARAM_PASSWORD:
1401 case ISCSI_PARAM_USERNAME_IN:
1402 case ISCSI_PARAM_PASSWORD_IN:
1403 case ISCSI_PARAM_FAST_ABORT:
1404 case ISCSI_PARAM_ABORT_TMO:
1405 case ISCSI_PARAM_LU_RESET_TMO:
1406 case ISCSI_PARAM_IFACE_NAME:
1407 case ISCSI_PARAM_INITIATOR_NAME:
1408 return S_IRUGO;
1409 default:
1410 return 0;
1411 }
1412 }
1413
1414 return 0;
1415}
1416

source code of linux/drivers/scsi/be2iscsi/be_iscsi.c