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