treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206
[muen/linux.git] / drivers / scsi / be2iscsi / be_iscsi.c
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  * @cmds_max: max commands supported
31  * @qdepth: max queue depth supported
32  * @initial_cmdsn: initial iscsi CMDSN
33  */
34 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
35                                                  u16 cmds_max,
36                                                  u16 qdepth,
37                                                  u32 initial_cmdsn)
38 {
39         struct Scsi_Host *shost;
40         struct beiscsi_endpoint *beiscsi_ep;
41         struct iscsi_cls_session *cls_session;
42         struct beiscsi_hba *phba;
43         struct iscsi_session *sess;
44         struct beiscsi_session *beiscsi_sess;
45         struct beiscsi_io_task *io_task;
46
47
48         if (!ep) {
49                 pr_err("beiscsi_session_create: invalid ep\n");
50                 return NULL;
51         }
52         beiscsi_ep = ep->dd_data;
53         phba = beiscsi_ep->phba;
54
55         if (!beiscsi_hba_is_online(phba)) {
56                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
57                             "BS_%d : HBA in error 0x%lx\n", phba->state);
58                 return NULL;
59         }
60
61         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
62                     "BS_%d : In beiscsi_session_create\n");
63         if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
64                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
65                             "BS_%d : Cannot handle %d cmds."
66                             "Max cmds per session supported is %d. Using %d."
67                             "\n", cmds_max,
68                             beiscsi_ep->phba->params.wrbs_per_cxn,
69                             beiscsi_ep->phba->params.wrbs_per_cxn);
70
71                 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
72         }
73
74         shost = phba->shost;
75         cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
76                                           shost, cmds_max,
77                                           sizeof(*beiscsi_sess),
78                                           sizeof(*io_task),
79                                           initial_cmdsn, ISCSI_MAX_TARGET);
80         if (!cls_session)
81                 return NULL;
82         sess = cls_session->dd_data;
83         beiscsi_sess = sess->dd_data;
84         beiscsi_sess->bhs_pool =  dma_pool_create("beiscsi_bhs_pool",
85                                                    &phba->pcidev->dev,
86                                                    sizeof(struct be_cmd_bhs),
87                                                    64, 0);
88         if (!beiscsi_sess->bhs_pool)
89                 goto destroy_sess;
90
91         return cls_session;
92 destroy_sess:
93         iscsi_session_teardown(cls_session);
94         return NULL;
95 }
96
97 /**
98  * beiscsi_session_destroy - destroys iscsi session
99  * @cls_session:        pointer to iscsi cls session
100  *
101  * Destroys iSCSI session instance and releases
102  * resources allocated for it.
103  */
104 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
105 {
106         struct iscsi_session *sess = cls_session->dd_data;
107         struct beiscsi_session *beiscsi_sess = sess->dd_data;
108
109         printk(KERN_INFO "In beiscsi_session_destroy\n");
110         dma_pool_destroy(beiscsi_sess->bhs_pool);
111         iscsi_session_teardown(cls_session);
112 }
113
114 /**
115  * beiscsi_session_fail(): Closing session with appropriate error
116  * @cls_session: ptr to session
117  **/
118 void beiscsi_session_fail(struct iscsi_cls_session *cls_session)
119 {
120         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
121 }
122
123
124 /**
125  * beiscsi_conn_create - create an instance of iscsi connection
126  * @cls_session: ptr to iscsi_cls_session
127  * @cid: iscsi cid
128  */
129 struct iscsi_cls_conn *
130 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
131 {
132         struct beiscsi_hba *phba;
133         struct Scsi_Host *shost;
134         struct iscsi_cls_conn *cls_conn;
135         struct beiscsi_conn *beiscsi_conn;
136         struct iscsi_conn *conn;
137         struct iscsi_session *sess;
138         struct beiscsi_session *beiscsi_sess;
139
140         shost = iscsi_session_to_shost(cls_session);
141         phba = iscsi_host_priv(shost);
142
143         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
144                     "BS_%d : In beiscsi_conn_create ,cid"
145                     "from iscsi layer=%d\n", cid);
146
147         cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
148         if (!cls_conn)
149                 return NULL;
150
151         conn = cls_conn->dd_data;
152         beiscsi_conn = conn->dd_data;
153         beiscsi_conn->ep = NULL;
154         beiscsi_conn->phba = phba;
155         beiscsi_conn->conn = conn;
156         sess = cls_session->dd_data;
157         beiscsi_sess = sess->dd_data;
158         beiscsi_conn->beiscsi_sess = beiscsi_sess;
159         return cls_conn;
160 }
161
162 /**
163  * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
164  * @cls_session: pointer to iscsi cls session
165  * @cls_conn: pointer to iscsi cls conn
166  * @transport_fd: EP handle(64 bit)
167  *
168  * This function binds the TCP Conn with iSCSI Connection and Session.
169  */
170 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
171                       struct iscsi_cls_conn *cls_conn,
172                       u64 transport_fd, int is_leading)
173 {
174         struct iscsi_conn *conn = cls_conn->dd_data;
175         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
176         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
177         struct beiscsi_hba *phba = iscsi_host_priv(shost);
178         struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
179         struct hwi_wrb_context *pwrb_context;
180         struct beiscsi_endpoint *beiscsi_ep;
181         struct iscsi_endpoint *ep;
182         uint16_t cri_index;
183
184         ep = iscsi_lookup_endpoint(transport_fd);
185         if (!ep)
186                 return -EINVAL;
187
188         beiscsi_ep = ep->dd_data;
189
190         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
191                 return -EINVAL;
192
193         if (beiscsi_ep->phba != phba) {
194                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
195                             "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
196                             beiscsi_ep->phba, phba);
197
198                 return -EEXIST;
199         }
200         cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
201         if (phba->conn_table[cri_index]) {
202                 if (beiscsi_conn != phba->conn_table[cri_index] ||
203                     beiscsi_ep != phba->conn_table[cri_index]->ep) {
204                         __beiscsi_log(phba, KERN_ERR,
205                                       "BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n",
206                                       cri_index,
207                                       beiscsi_ep->ep_cid,
208                                       beiscsi_conn,
209                                       phba->conn_table[cri_index]);
210                         return -EINVAL;
211                 }
212         }
213
214         beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
215         beiscsi_conn->ep = beiscsi_ep;
216         beiscsi_ep->conn = beiscsi_conn;
217         /**
218          * Each connection is associated with a WRBQ kept in wrb_context.
219          * Store doorbell offset for transmit path.
220          */
221         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
222         beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
223         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
224                     "BS_%d : cid %d phba->conn_table[%u]=%p\n",
225                     beiscsi_ep->ep_cid, cri_index, beiscsi_conn);
226         phba->conn_table[cri_index] = beiscsi_conn;
227         return 0;
228 }
229
230 static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba)
231 {
232         if (phba->ipv4_iface)
233                 return 0;
234
235         phba->ipv4_iface = iscsi_create_iface(phba->shost,
236                                               &beiscsi_iscsi_transport,
237                                               ISCSI_IFACE_TYPE_IPV4,
238                                               0, 0);
239         if (!phba->ipv4_iface) {
240                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
241                             "BS_%d : Could not "
242                             "create default IPv4 address.\n");
243                 return -ENODEV;
244         }
245
246         return 0;
247 }
248
249 static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba)
250 {
251         if (phba->ipv6_iface)
252                 return 0;
253
254         phba->ipv6_iface = iscsi_create_iface(phba->shost,
255                                               &beiscsi_iscsi_transport,
256                                               ISCSI_IFACE_TYPE_IPV6,
257                                               0, 0);
258         if (!phba->ipv6_iface) {
259                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
260                             "BS_%d : Could not "
261                             "create default IPv6 address.\n");
262                 return -ENODEV;
263         }
264
265         return 0;
266 }
267
268 void beiscsi_iface_create_default(struct beiscsi_hba *phba)
269 {
270         struct be_cmd_get_if_info_resp *if_info;
271
272         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) {
273                 beiscsi_iface_create_ipv4(phba);
274                 kfree(if_info);
275         }
276
277         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) {
278                 beiscsi_iface_create_ipv6(phba);
279                 kfree(if_info);
280         }
281 }
282
283 void beiscsi_iface_destroy_default(struct beiscsi_hba *phba)
284 {
285         if (phba->ipv6_iface) {
286                 iscsi_destroy_iface(phba->ipv6_iface);
287                 phba->ipv6_iface = NULL;
288         }
289         if (phba->ipv4_iface) {
290                 iscsi_destroy_iface(phba->ipv4_iface);
291                 phba->ipv4_iface = NULL;
292         }
293 }
294
295 /**
296  * beiscsi_set_vlan_tag()- Set the VLAN TAG
297  * @shost: Scsi Host for the driver instance
298  * @iface_param: Interface paramters
299  *
300  * Set the VLAN TAG for the adapter or disable
301  * the VLAN config
302  *
303  * returns
304  *      Success: 0
305  *      Failure: Non-Zero Value
306  **/
307 static int
308 beiscsi_iface_config_vlan(struct Scsi_Host *shost,
309                           struct iscsi_iface_param_info *iface_param)
310 {
311         struct beiscsi_hba *phba = iscsi_host_priv(shost);
312         int ret = -EPERM;
313
314         switch (iface_param->param) {
315         case ISCSI_NET_PARAM_VLAN_ENABLED:
316                 ret = 0;
317                 if (iface_param->value[0] != ISCSI_VLAN_ENABLE)
318                         ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE);
319                 break;
320         case ISCSI_NET_PARAM_VLAN_TAG:
321                 ret = beiscsi_if_set_vlan(phba,
322                                           *((uint16_t *)iface_param->value));
323                 break;
324         }
325         return ret;
326 }
327
328
329 static int
330 beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
331                           struct iscsi_iface_param_info *info,
332                           void *data, uint32_t dt_len)
333 {
334         struct beiscsi_hba *phba = iscsi_host_priv(shost);
335         u8 *ip = NULL, *subnet = NULL, *gw;
336         struct nlattr *nla;
337         int ret = -EPERM;
338
339         /* Check the param */
340         switch (info->param) {
341         case ISCSI_NET_PARAM_IFACE_ENABLE:
342                 if (info->value[0] == ISCSI_IFACE_ENABLE)
343                         ret = beiscsi_iface_create_ipv4(phba);
344                 else {
345                         iscsi_destroy_iface(phba->ipv4_iface);
346                         phba->ipv4_iface = NULL;
347                 }
348                 break;
349         case ISCSI_NET_PARAM_IPV4_GW:
350                 gw = info->value;
351                 ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw);
352                 break;
353         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
354                 if (info->value[0] == ISCSI_BOOTPROTO_DHCP)
355                         ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4);
356                 else if (info->value[0] == ISCSI_BOOTPROTO_STATIC)
357                         /* release DHCP IP address */
358                         ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
359                                                    NULL, NULL);
360                 else
361                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
362                                     "BS_%d : Invalid BOOTPROTO: %d\n",
363                                     info->value[0]);
364                 break;
365         case ISCSI_NET_PARAM_IPV4_ADDR:
366                 ip = info->value;
367                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET);
368                 if (nla) {
369                         info = nla_data(nla);
370                         subnet = info->value;
371                 }
372                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
373                                            ip, subnet);
374                 break;
375         case ISCSI_NET_PARAM_IPV4_SUBNET:
376                 /*
377                  * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP
378                  * and subnet both. Find IP to be applied for this subnet.
379                  */
380                 subnet = info->value;
381                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR);
382                 if (nla) {
383                         info = nla_data(nla);
384                         ip = info->value;
385                 }
386                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
387                                            ip, subnet);
388                 break;
389         }
390
391         return ret;
392 }
393
394 static int
395 beiscsi_iface_config_ipv6(struct Scsi_Host *shost,
396                           struct iscsi_iface_param_info *iface_param,
397                           void *data, uint32_t dt_len)
398 {
399         struct beiscsi_hba *phba = iscsi_host_priv(shost);
400         int ret = -EPERM;
401
402         switch (iface_param->param) {
403         case ISCSI_NET_PARAM_IFACE_ENABLE:
404                 if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
405                         ret = beiscsi_iface_create_ipv6(phba);
406                 else {
407                         iscsi_destroy_iface(phba->ipv6_iface);
408                         phba->ipv6_iface = NULL;
409                 }
410                 break;
411         case ISCSI_NET_PARAM_IPV6_ADDR:
412                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6,
413                                            iface_param->value, NULL);
414                 break;
415         }
416
417         return ret;
418 }
419
420 int beiscsi_iface_set_param(struct Scsi_Host *shost,
421                             void *data, uint32_t dt_len)
422 {
423         struct iscsi_iface_param_info *iface_param = NULL;
424         struct beiscsi_hba *phba = iscsi_host_priv(shost);
425         struct nlattr *attrib;
426         uint32_t rm_len = dt_len;
427         int ret;
428
429         if (!beiscsi_hba_is_online(phba)) {
430                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
431                             "BS_%d : HBA in error 0x%lx\n", phba->state);
432                 return -EBUSY;
433         }
434
435         /* update interface_handle */
436         ret = beiscsi_if_get_handle(phba);
437         if (ret) {
438                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
439                             "BS_%d : Getting Interface Handle Failed\n");
440                 return ret;
441         }
442
443         nla_for_each_attr(attrib, data, dt_len, rm_len) {
444                 iface_param = nla_data(attrib);
445
446                 if (iface_param->param_type != ISCSI_NET_PARAM)
447                         continue;
448
449                 /*
450                  * BE2ISCSI only supports 1 interface
451                  */
452                 if (iface_param->iface_num) {
453                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
454                                     "BS_%d : Invalid iface_num %d."
455                                     "Only iface_num 0 is supported.\n",
456                                     iface_param->iface_num);
457
458                         return -EINVAL;
459                 }
460
461                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
462                             "BS_%d : %s.0 set param %d",
463                             (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ?
464                             "ipv4" : "ipv6", iface_param->param);
465
466                 ret = -EPERM;
467                 switch (iface_param->param) {
468                 case ISCSI_NET_PARAM_VLAN_ENABLED:
469                 case ISCSI_NET_PARAM_VLAN_TAG:
470                         ret = beiscsi_iface_config_vlan(shost, iface_param);
471                         break;
472                 default:
473                         switch (iface_param->iface_type) {
474                         case ISCSI_IFACE_TYPE_IPV4:
475                                 ret = beiscsi_iface_config_ipv4(shost,
476                                                                 iface_param,
477                                                                 data, dt_len);
478                                 break;
479                         case ISCSI_IFACE_TYPE_IPV6:
480                                 ret = beiscsi_iface_config_ipv6(shost,
481                                                                 iface_param,
482                                                                 data, dt_len);
483                                 break;
484                         }
485                 }
486
487                 if (ret == -EPERM) {
488                         __beiscsi_log(phba, KERN_ERR,
489                                       "BS_%d : %s.0 set param %d not permitted",
490                                       (iface_param->iface_type ==
491                                        ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6",
492                                       iface_param->param);
493                         ret = 0;
494                 }
495                 if (ret)
496                         break;
497         }
498
499         return ret;
500 }
501
502 static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
503                                      struct iscsi_iface *iface,
504                                      int param, char *buf)
505 {
506         struct be_cmd_get_if_info_resp *if_info;
507         int len, ip_type = BEISCSI_IP_TYPE_V4;
508
509         if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
510                 ip_type = BEISCSI_IP_TYPE_V6;
511
512         len = beiscsi_if_get_info(phba, ip_type, &if_info);
513         if (len)
514                 return len;
515
516         switch (param) {
517         case ISCSI_NET_PARAM_IPV4_ADDR:
518                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr);
519                 break;
520         case ISCSI_NET_PARAM_IPV6_ADDR:
521                 len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr);
522                 break;
523         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
524                 if (!if_info->dhcp_state)
525                         len = sprintf(buf, "static\n");
526                 else
527                         len = sprintf(buf, "dhcp\n");
528                 break;
529         case ISCSI_NET_PARAM_IPV4_SUBNET:
530                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask);
531                 break;
532         case ISCSI_NET_PARAM_VLAN_ENABLED:
533                 len = sprintf(buf, "%s\n",
534                               (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ?
535                               "disable" : "enable");
536                 break;
537         case ISCSI_NET_PARAM_VLAN_ID:
538                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
539                         len = -EINVAL;
540                 else
541                         len = sprintf(buf, "%d\n",
542                                       (if_info->vlan_priority &
543                                        ISCSI_MAX_VLAN_ID));
544                 break;
545         case ISCSI_NET_PARAM_VLAN_PRIORITY:
546                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
547                         len = -EINVAL;
548                 else
549                         len = sprintf(buf, "%d\n",
550                                       ((if_info->vlan_priority >> 13) &
551                                        ISCSI_MAX_VLAN_PRIORITY));
552                 break;
553         default:
554                 WARN_ON(1);
555         }
556
557         kfree(if_info);
558         return len;
559 }
560
561 int beiscsi_iface_get_param(struct iscsi_iface *iface,
562                             enum iscsi_param_type param_type,
563                             int param, char *buf)
564 {
565         struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
566         struct beiscsi_hba *phba = iscsi_host_priv(shost);
567         struct be_cmd_get_def_gateway_resp gateway;
568         int len = -EPERM;
569
570         if (param_type != ISCSI_NET_PARAM)
571                 return 0;
572         if (!beiscsi_hba_is_online(phba)) {
573                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
574                             "BS_%d : HBA in error 0x%lx\n", phba->state);
575                 return -EBUSY;
576         }
577
578         switch (param) {
579         case ISCSI_NET_PARAM_IPV4_ADDR:
580         case ISCSI_NET_PARAM_IPV4_SUBNET:
581         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
582         case ISCSI_NET_PARAM_IPV6_ADDR:
583         case ISCSI_NET_PARAM_VLAN_ENABLED:
584         case ISCSI_NET_PARAM_VLAN_ID:
585         case ISCSI_NET_PARAM_VLAN_PRIORITY:
586                 len = __beiscsi_iface_get_param(phba, iface, param, buf);
587                 break;
588         case ISCSI_NET_PARAM_IFACE_ENABLE:
589                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
590                         len = sprintf(buf, "%s\n",
591                                       phba->ipv4_iface ? "enable" : "disable");
592                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
593                         len = sprintf(buf, "%s\n",
594                                       phba->ipv6_iface ? "enable" : "disable");
595                 break;
596         case ISCSI_NET_PARAM_IPV4_GW:
597                 memset(&gateway, 0, sizeof(gateway));
598                 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway);
599                 if (!len)
600                         len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr);
601                 break;
602         }
603
604         return len;
605 }
606
607 /**
608  * beiscsi_ep_get_param - get the iscsi parameter
609  * @ep: pointer to iscsi ep
610  * @param: parameter type identifier
611  * @buf: buffer pointer
612  *
613  * returns iscsi parameter
614  */
615 int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
616                            enum iscsi_param param, char *buf)
617 {
618         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
619         int len;
620
621         beiscsi_log(beiscsi_ep->phba, KERN_INFO,
622                     BEISCSI_LOG_CONFIG,
623                     "BS_%d : In beiscsi_ep_get_param,"
624                     " param= %d\n", param);
625
626         switch (param) {
627         case ISCSI_PARAM_CONN_PORT:
628                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
629                 break;
630         case ISCSI_PARAM_CONN_ADDRESS:
631                 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
632                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
633                 else
634                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
635                 break;
636         default:
637                 len = -EPERM;
638         }
639         return len;
640 }
641
642 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
643                       enum iscsi_param param, char *buf, int buflen)
644 {
645         struct iscsi_conn *conn = cls_conn->dd_data;
646         struct iscsi_session *session = conn->session;
647         struct beiscsi_hba *phba = NULL;
648         int ret;
649
650         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
651         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
652                     "BS_%d : In beiscsi_conn_set_param,"
653                     " param= %d\n", param);
654
655         ret = iscsi_set_param(cls_conn, param, buf, buflen);
656         if (ret)
657                 return ret;
658         /*
659          * If userspace tried to set the value to higher than we can
660          * support override here.
661          */
662         switch (param) {
663         case ISCSI_PARAM_FIRST_BURST:
664                 if (session->first_burst > 8192)
665                         session->first_burst = 8192;
666                 break;
667         case ISCSI_PARAM_MAX_RECV_DLENGTH:
668                 if (conn->max_recv_dlength > 65536)
669                         conn->max_recv_dlength = 65536;
670                 break;
671         case ISCSI_PARAM_MAX_BURST:
672                 if (session->max_burst > 262144)
673                         session->max_burst = 262144;
674                 break;
675         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
676                 if (conn->max_xmit_dlength > 65536)
677                         conn->max_xmit_dlength = 65536;
678                 /* fall through */
679         default:
680                 return 0;
681         }
682
683         return 0;
684 }
685
686 /**
687  * beiscsi_get_port_state - Get the Port State
688  * @shost : pointer to scsi_host structure
689  *
690  */
691 static void beiscsi_get_port_state(struct Scsi_Host *shost)
692 {
693         struct beiscsi_hba *phba = iscsi_host_priv(shost);
694         struct iscsi_cls_host *ihost = shost->shost_data;
695
696         ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ?
697                 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN;
698 }
699
700 /**
701  * beiscsi_get_port_speed  - Get the Port Speed from Adapter
702  * @shost : pointer to scsi_host structure
703  *
704  */
705 static void beiscsi_get_port_speed(struct Scsi_Host *shost)
706 {
707         struct beiscsi_hba *phba = iscsi_host_priv(shost);
708         struct iscsi_cls_host *ihost = shost->shost_data;
709
710         switch (phba->port_speed) {
711         case BE2ISCSI_LINK_SPEED_10MBPS:
712                 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS;
713                 break;
714         case BE2ISCSI_LINK_SPEED_100MBPS:
715                 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS;
716                 break;
717         case BE2ISCSI_LINK_SPEED_1GBPS:
718                 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS;
719                 break;
720         case BE2ISCSI_LINK_SPEED_10GBPS:
721                 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS;
722                 break;
723         case BE2ISCSI_LINK_SPEED_25GBPS:
724                 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS;
725                 break;
726         case BE2ISCSI_LINK_SPEED_40GBPS:
727                 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS;
728                 break;
729         default:
730                 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN;
731         }
732 }
733
734 /**
735  * beiscsi_get_host_param - get the iscsi parameter
736  * @shost: pointer to scsi_host structure
737  * @param: parameter type identifier
738  * @buf: buffer pointer
739  *
740  */
741 int beiscsi_get_host_param(struct Scsi_Host *shost,
742                            enum iscsi_host_param param, char *buf)
743 {
744         struct beiscsi_hba *phba = iscsi_host_priv(shost);
745         int status = 0;
746
747         if (!beiscsi_hba_is_online(phba)) {
748                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
749                             "BS_%d : HBA in error 0x%lx\n", phba->state);
750                 return 0;
751         }
752         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
753                     "BS_%d : In beiscsi_get_host_param, param = %d\n", param);
754
755         switch (param) {
756         case ISCSI_HOST_PARAM_HWADDRESS:
757                 status = beiscsi_get_macaddr(buf, phba);
758                 if (status < 0) {
759                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
760                                     "BS_%d : beiscsi_get_macaddr Failed\n");
761                         return 0;
762                 }
763                 break;
764         case ISCSI_HOST_PARAM_INITIATOR_NAME:
765                 /* try fetching user configured name first */
766                 status = beiscsi_get_initiator_name(phba, buf, true);
767                 if (status < 0) {
768                         status = beiscsi_get_initiator_name(phba, buf, false);
769                         if (status < 0) {
770                                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
771                                             "BS_%d : Retrieving Initiator Name Failed\n");
772                                 status = 0;
773                         }
774                 }
775                 break;
776         case ISCSI_HOST_PARAM_PORT_STATE:
777                 beiscsi_get_port_state(shost);
778                 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost));
779                 break;
780         case ISCSI_HOST_PARAM_PORT_SPEED:
781                 beiscsi_get_port_speed(shost);
782                 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost));
783                 break;
784         default:
785                 return iscsi_host_get_param(shost, param, buf);
786         }
787         return status;
788 }
789
790 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
791 {
792         struct be_cmd_get_nic_conf_resp resp;
793         int rc;
794
795         if (phba->mac_addr_set)
796                 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
797
798         memset(&resp, 0, sizeof(resp));
799         rc = mgmt_get_nic_conf(phba, &resp);
800         if (rc)
801                 return rc;
802
803         phba->mac_addr_set = true;
804         memcpy(phba->mac_address, resp.mac_address, ETH_ALEN);
805         return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
806 }
807
808 /**
809  * beiscsi_conn_get_stats - get the iscsi stats
810  * @cls_conn: pointer to iscsi cls conn
811  * @stats: pointer to iscsi_stats structure
812  *
813  * returns iscsi stats
814  */
815 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
816                             struct iscsi_stats *stats)
817 {
818         struct iscsi_conn *conn = cls_conn->dd_data;
819         struct beiscsi_hba *phba = NULL;
820
821         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
822         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
823                     "BS_%d : In beiscsi_conn_get_stats\n");
824
825         stats->txdata_octets = conn->txdata_octets;
826         stats->rxdata_octets = conn->rxdata_octets;
827         stats->dataout_pdus = conn->dataout_pdus_cnt;
828         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
829         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
830         stats->datain_pdus = conn->datain_pdus_cnt;
831         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
832         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
833         stats->r2t_pdus = conn->r2t_pdus_cnt;
834         stats->digest_err = 0;
835         stats->timeout_err = 0;
836         stats->custom_length = 1;
837         strcpy(stats->custom[0].desc, "eh_abort_cnt");
838         stats->custom[0].value = conn->eh_abort_cnt;
839 }
840
841 /**
842  * beiscsi_set_params_for_offld - get the parameters for offload
843  * @beiscsi_conn: pointer to beiscsi_conn
844  * @params: pointer to offload_params structure
845  */
846 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
847                                           struct beiscsi_offload_params *params)
848 {
849         struct iscsi_conn *conn = beiscsi_conn->conn;
850         struct iscsi_session *session = conn->session;
851
852         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
853                       params, session->max_burst);
854         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
855                       max_send_data_segment_length, params,
856                       conn->max_xmit_dlength);
857         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
858                       params, session->first_burst);
859         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
860                       session->erl);
861         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
862                       conn->datadgst_en);
863         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
864                       conn->hdrdgst_en);
865         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
866                       session->initial_r2t_en);
867         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
868                       session->imm_data_en);
869         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
870                       data_seq_inorder, params,
871                       session->dataseq_inorder_en);
872         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
873                       pdu_seq_inorder, params,
874                       session->pdu_inorder_en);
875         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params,
876                       session->max_r2t);
877         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
878                       (conn->exp_statsn - 1));
879         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
880                       max_recv_data_segment_length, params,
881                       conn->max_recv_dlength);
882
883 }
884
885 /**
886  * beiscsi_conn_start - offload of session to chip
887  * @cls_conn: pointer to beiscsi_conn
888  */
889 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
890 {
891         struct iscsi_conn *conn = cls_conn->dd_data;
892         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
893         struct beiscsi_endpoint *beiscsi_ep;
894         struct beiscsi_offload_params params;
895         struct beiscsi_hba *phba;
896
897         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
898
899         if (!beiscsi_hba_is_online(phba)) {
900                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
901                             "BS_%d : HBA in error 0x%lx\n", phba->state);
902                 return -EBUSY;
903         }
904         beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
905                     "BS_%d : In beiscsi_conn_start\n");
906
907         memset(&params, 0, sizeof(struct beiscsi_offload_params));
908         beiscsi_ep = beiscsi_conn->ep;
909         if (!beiscsi_ep)
910                 beiscsi_log(beiscsi_conn->phba, KERN_ERR,
911                             BEISCSI_LOG_CONFIG,
912                             "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n");
913
914         beiscsi_conn->login_in_progress = 0;
915         beiscsi_set_params_for_offld(beiscsi_conn, &params);
916         beiscsi_offload_connection(beiscsi_conn, &params);
917         iscsi_conn_start(cls_conn);
918         return 0;
919 }
920
921 /**
922  * beiscsi_get_cid - Allocate a cid
923  * @phba: The phba instance
924  */
925 static int beiscsi_get_cid(struct beiscsi_hba *phba)
926 {
927         uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1;
928         unsigned short cid, cid_from_ulp;
929         struct ulp_cid_info *cid_info;
930
931         /* Find the ULP which has more CID available */
932         cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ?
933                           BEISCSI_ULP0_AVLBL_CID(phba) : 0;
934         cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ?
935                           BEISCSI_ULP1_AVLBL_CID(phba) : 0;
936         cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ?
937                         BEISCSI_ULP0 : BEISCSI_ULP1;
938         /**
939          * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp
940          * is ZERO for both, ULP 1 is returned.
941          * Check if ULP is loaded before getting new CID.
942          */
943         if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported))
944                 return BE_INVALID_CID;
945
946         cid_info = phba->cid_array_info[cid_from_ulp];
947         cid = cid_info->cid_array[cid_info->cid_alloc];
948         if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) {
949                 __beiscsi_log(phba, KERN_ERR,
950                                 "BS_%d : failed to get cid: available %u:%u\n",
951                                 cid_info->avlbl_cids, cid_info->cid_free);
952                 return BE_INVALID_CID;
953         }
954         /* empty the slot */
955         cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID;
956         if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp))
957                 cid_info->cid_alloc = 0;
958         cid_info->avlbl_cids--;
959         return cid;
960 }
961
962 /**
963  * beiscsi_put_cid - Free the cid
964  * @phba: The phba for which the cid is being freed
965  * @cid: The cid to free
966  */
967 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
968 {
969         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
970         struct hwi_wrb_context *pwrb_context;
971         struct hwi_controller *phwi_ctrlr;
972         struct ulp_cid_info *cid_info;
973         uint16_t cid_post_ulp;
974
975         phwi_ctrlr = phba->phwi_ctrlr;
976         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
977         cid_post_ulp = pwrb_context->ulp_num;
978
979         cid_info = phba->cid_array_info[cid_post_ulp];
980         /* fill only in empty slot */
981         if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) {
982                 __beiscsi_log(phba, KERN_ERR,
983                               "BS_%d : failed to put cid %u: available %u:%u\n",
984                               cid, cid_info->avlbl_cids, cid_info->cid_free);
985                 return;
986         }
987         cid_info->cid_array[cid_info->cid_free++] = cid;
988         if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp))
989                 cid_info->cid_free = 0;
990         cid_info->avlbl_cids++;
991 }
992
993 /**
994  * beiscsi_free_ep - free endpoint
995  * @ep: pointer to iscsi endpoint structure
996  */
997 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
998 {
999         struct beiscsi_hba *phba = beiscsi_ep->phba;
1000         struct beiscsi_conn *beiscsi_conn;
1001
1002         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
1003         beiscsi_ep->phba = NULL;
1004         /* clear this to track freeing in beiscsi_ep_disconnect */
1005         phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL;
1006
1007         /**
1008          * Check if any connection resource allocated by driver
1009          * is to be freed.This case occurs when target redirection
1010          * or connection retry is done.
1011          **/
1012         if (!beiscsi_ep->conn)
1013                 return;
1014
1015         beiscsi_conn = beiscsi_ep->conn;
1016         /**
1017          * Break ep->conn link here so that completions after
1018          * this are ignored.
1019          */
1020         beiscsi_ep->conn = NULL;
1021         if (beiscsi_conn->login_in_progress) {
1022                 beiscsi_free_mgmt_task_handles(beiscsi_conn,
1023                                                beiscsi_conn->task);
1024                 beiscsi_conn->login_in_progress = 0;
1025         }
1026 }
1027
1028 /**
1029  * beiscsi_open_conn - Ask FW to open a TCP connection
1030  * @ep: endpoint to be used
1031  * @src_addr: The source IP address
1032  * @dst_addr: The Destination  IP address
1033  *
1034  * Asks the FW to open a TCP connection
1035  */
1036 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
1037                              struct sockaddr *src_addr,
1038                              struct sockaddr *dst_addr, int non_blocking)
1039 {
1040         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1041         struct beiscsi_hba *phba = beiscsi_ep->phba;
1042         struct tcp_connect_and_offload_out *ptcpcnct_out;
1043         struct be_dma_mem nonemb_cmd;
1044         unsigned int tag, req_memsize;
1045         int ret = -ENOMEM;
1046
1047         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1048                     "BS_%d : In beiscsi_open_conn\n");
1049
1050         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
1051         if (beiscsi_ep->ep_cid == BE_INVALID_CID) {
1052                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1053                             "BS_%d : No free cid available\n");
1054                 return ret;
1055         }
1056
1057         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1058                     "BS_%d : In beiscsi_open_conn, ep_cid=%d\n",
1059                     beiscsi_ep->ep_cid);
1060
1061         phba->ep_array[BE_GET_CRI_FROM_CID
1062                        (beiscsi_ep->ep_cid)] = ep;
1063
1064         beiscsi_ep->cid_vld = 0;
1065
1066         if (is_chip_be2_be3r(phba))
1067                 req_memsize = sizeof(struct tcp_connect_and_offload_in);
1068         else
1069                 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1);
1070
1071         nonemb_cmd.va = dma_alloc_coherent(&phba->ctrl.pdev->dev,
1072                                 req_memsize,
1073                                 &nonemb_cmd.dma, GFP_KERNEL);
1074         if (nonemb_cmd.va == NULL) {
1075
1076                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1077                             "BS_%d : Failed to allocate memory for"
1078                             " mgmt_open_connection\n");
1079
1080                 beiscsi_free_ep(beiscsi_ep);
1081                 return -ENOMEM;
1082         }
1083         nonemb_cmd.size = req_memsize;
1084         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
1085         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
1086         if (!tag) {
1087                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1088                             "BS_%d : mgmt_open_connection Failed for cid=%d\n",
1089                             beiscsi_ep->ep_cid);
1090
1091                 dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
1092                                     nonemb_cmd.va, nonemb_cmd.dma);
1093                 beiscsi_free_ep(beiscsi_ep);
1094                 return -EAGAIN;
1095         }
1096
1097         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
1098         if (ret) {
1099                 beiscsi_log(phba, KERN_ERR,
1100                             BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
1101                             "BS_%d : mgmt_open_connection Failed");
1102
1103                 if (ret != -EBUSY)
1104                         dma_free_coherent(&phba->ctrl.pdev->dev,
1105                                         nonemb_cmd.size, nonemb_cmd.va,
1106                                         nonemb_cmd.dma);
1107
1108                 beiscsi_free_ep(beiscsi_ep);
1109                 return ret;
1110         }
1111
1112         ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va;
1113         beiscsi_ep = ep->dd_data;
1114         beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
1115         beiscsi_ep->cid_vld = 1;
1116         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1117                     "BS_%d : mgmt_open_connection Success\n");
1118
1119         dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
1120                             nonemb_cmd.va, nonemb_cmd.dma);
1121         return 0;
1122 }
1123
1124 /**
1125  * beiscsi_ep_connect - Ask chip to create TCP Conn
1126  * @scsi_host: Pointer to scsi_host structure
1127  * @dst_addr: The IP address of Target
1128  * @non_blocking: blocking or non-blocking call
1129  *
1130  * This routines first asks chip to create a connection and then allocates an EP
1131  */
1132 struct iscsi_endpoint *
1133 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
1134                    int non_blocking)
1135 {
1136         struct beiscsi_hba *phba;
1137         struct beiscsi_endpoint *beiscsi_ep;
1138         struct iscsi_endpoint *ep;
1139         int ret;
1140
1141         if (!shost) {
1142                 ret = -ENXIO;
1143                 pr_err("beiscsi_ep_connect shost is NULL\n");
1144                 return ERR_PTR(ret);
1145         }
1146
1147         phba = iscsi_host_priv(shost);
1148         if (!beiscsi_hba_is_online(phba)) {
1149                 ret = -EIO;
1150                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1151                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1152                 return ERR_PTR(ret);
1153         }
1154         if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) {
1155                 ret = -EBUSY;
1156                 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
1157                             "BS_%d : The Adapter Port state is Down!!!\n");
1158                 return ERR_PTR(ret);
1159         }
1160
1161         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
1162         if (!ep) {
1163                 ret = -ENOMEM;
1164                 return ERR_PTR(ret);
1165         }
1166
1167         beiscsi_ep = ep->dd_data;
1168         beiscsi_ep->phba = phba;
1169         beiscsi_ep->openiscsi_ep = ep;
1170         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
1171         if (ret) {
1172                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1173                             "BS_%d : Failed in beiscsi_open_conn\n");
1174                 goto free_ep;
1175         }
1176
1177         return ep;
1178
1179 free_ep:
1180         iscsi_destroy_endpoint(ep);
1181         return ERR_PTR(ret);
1182 }
1183
1184 /**
1185  * beiscsi_ep_poll - Poll to see if connection is established
1186  * @ep: endpoint to be used
1187  * @timeout_ms: timeout specified in millisecs
1188  *
1189  * Poll to see if TCP connection established
1190  */
1191 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1192 {
1193         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1194
1195         beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1196                     "BS_%d : In  beiscsi_ep_poll\n");
1197
1198         if (beiscsi_ep->cid_vld == 1)
1199                 return 1;
1200         else
1201                 return 0;
1202 }
1203
1204 /**
1205  * beiscsi_flush_cq()- Flush the CQ created.
1206  * @phba: ptr device priv structure.
1207  *
1208  * Before the connection resource are freed flush
1209  * all the CQ enteries
1210  **/
1211 static void beiscsi_flush_cq(struct beiscsi_hba *phba)
1212 {
1213         uint16_t i;
1214         struct be_eq_obj *pbe_eq;
1215         struct hwi_controller *phwi_ctrlr;
1216         struct hwi_context_memory *phwi_context;
1217
1218         phwi_ctrlr = phba->phwi_ctrlr;
1219         phwi_context = phwi_ctrlr->phwi_ctxt;
1220
1221         for (i = 0; i < phba->num_cpus; i++) {
1222                 pbe_eq = &phwi_context->be_eq[i];
1223                 irq_poll_disable(&pbe_eq->iopoll);
1224                 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC);
1225                 irq_poll_enable(&pbe_eq->iopoll);
1226         }
1227 }
1228
1229 /**
1230  * beiscsi_conn_close - Invalidate and upload connection
1231  * @ep: The iscsi endpoint
1232  *
1233  * Returns 0 on success,  -1 on failure.
1234  */
1235 static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep)
1236 {
1237         struct beiscsi_hba *phba = beiscsi_ep->phba;
1238         unsigned int tag, attempts;
1239         int ret;
1240
1241         /**
1242          * Without successfully invalidating and uploading connection
1243          * driver can't reuse the CID so attempt more than once.
1244          */
1245         attempts = 0;
1246         while (attempts++ < 3) {
1247                 tag = beiscsi_invalidate_cxn(phba, beiscsi_ep);
1248                 if (tag) {
1249                         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1250                         if (!ret)
1251                                 break;
1252                         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1253                                     "BS_%d : invalidate conn failed cid %d\n",
1254                                     beiscsi_ep->ep_cid);
1255                 }
1256         }
1257
1258         /* wait for all completions to arrive, then process them */
1259         msleep(250);
1260         /* flush CQ entries */
1261         beiscsi_flush_cq(phba);
1262
1263         if (attempts > 3)
1264                 return -1;
1265
1266         attempts = 0;
1267         while (attempts++ < 3) {
1268                 tag = beiscsi_upload_cxn(phba, beiscsi_ep);
1269                 if (tag) {
1270                         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1271                         if (!ret)
1272                                 break;
1273                         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1274                                     "BS_%d : upload conn failed cid %d\n",
1275                                     beiscsi_ep->ep_cid);
1276                 }
1277         }
1278         if (attempts > 3)
1279                 return -1;
1280
1281         return 0;
1282 }
1283
1284 /**
1285  * beiscsi_ep_disconnect - Tears down the TCP connection
1286  * @ep: endpoint to be used
1287  *
1288  * Tears down the TCP connection
1289  */
1290 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
1291 {
1292         struct beiscsi_endpoint *beiscsi_ep;
1293         struct beiscsi_conn *beiscsi_conn;
1294         struct beiscsi_hba *phba;
1295         uint16_t cri_index;
1296
1297         beiscsi_ep = ep->dd_data;
1298         phba = beiscsi_ep->phba;
1299         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1300                     "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n",
1301                     beiscsi_ep->ep_cid);
1302
1303         cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
1304         if (!phba->ep_array[cri_index]) {
1305                 __beiscsi_log(phba, KERN_ERR,
1306                               "BS_%d : ep_array at %u cid %u empty\n",
1307                               cri_index,
1308                               beiscsi_ep->ep_cid);
1309                 return;
1310         }
1311
1312         if (beiscsi_ep->conn) {
1313                 beiscsi_conn = beiscsi_ep->conn;
1314                 iscsi_suspend_queue(beiscsi_conn->conn);
1315         }
1316
1317         if (!beiscsi_hba_is_online(phba)) {
1318                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1319                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1320         } else {
1321                 /**
1322                  * Make CID available even if close fails.
1323                  * If not freed, FW might fail open using the CID.
1324                  */
1325                 if (beiscsi_conn_close(beiscsi_ep) < 0)
1326                         __beiscsi_log(phba, KERN_ERR,
1327                                       "BS_%d : close conn failed cid %d\n",
1328                                       beiscsi_ep->ep_cid);
1329         }
1330
1331         beiscsi_free_ep(beiscsi_ep);
1332         if (!phba->conn_table[cri_index])
1333                 __beiscsi_log(phba, KERN_ERR,
1334                               "BS_%d : conn_table empty at %u: cid %u\n",
1335                               cri_index, beiscsi_ep->ep_cid);
1336         phba->conn_table[cri_index] = NULL;
1337         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
1338 }
1339
1340 umode_t beiscsi_attr_is_visible(int param_type, int param)
1341 {
1342         switch (param_type) {
1343         case ISCSI_NET_PARAM:
1344                 switch (param) {
1345                 case ISCSI_NET_PARAM_IFACE_ENABLE:
1346                 case ISCSI_NET_PARAM_IPV4_ADDR:
1347                 case ISCSI_NET_PARAM_IPV4_SUBNET:
1348                 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
1349                 case ISCSI_NET_PARAM_IPV4_GW:
1350                 case ISCSI_NET_PARAM_IPV6_ADDR:
1351                 case ISCSI_NET_PARAM_VLAN_ID:
1352                 case ISCSI_NET_PARAM_VLAN_PRIORITY:
1353                 case ISCSI_NET_PARAM_VLAN_ENABLED:
1354                         return S_IRUGO;
1355                 default:
1356                         return 0;
1357                 }
1358         case ISCSI_HOST_PARAM:
1359                 switch (param) {
1360                 case ISCSI_HOST_PARAM_HWADDRESS:
1361                 case ISCSI_HOST_PARAM_INITIATOR_NAME:
1362                 case ISCSI_HOST_PARAM_PORT_STATE:
1363                 case ISCSI_HOST_PARAM_PORT_SPEED:
1364                         return S_IRUGO;
1365                 default:
1366                         return 0;
1367                 }
1368         case ISCSI_PARAM:
1369                 switch (param) {
1370                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1371                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1372                 case ISCSI_PARAM_HDRDGST_EN:
1373                 case ISCSI_PARAM_DATADGST_EN:
1374                 case ISCSI_PARAM_CONN_ADDRESS:
1375                 case ISCSI_PARAM_CONN_PORT:
1376                 case ISCSI_PARAM_EXP_STATSN:
1377                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1378                 case ISCSI_PARAM_PERSISTENT_PORT:
1379                 case ISCSI_PARAM_PING_TMO:
1380                 case ISCSI_PARAM_RECV_TMO:
1381                 case ISCSI_PARAM_INITIAL_R2T_EN:
1382                 case ISCSI_PARAM_MAX_R2T:
1383                 case ISCSI_PARAM_IMM_DATA_EN:
1384                 case ISCSI_PARAM_FIRST_BURST:
1385                 case ISCSI_PARAM_MAX_BURST:
1386                 case ISCSI_PARAM_PDU_INORDER_EN:
1387                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1388                 case ISCSI_PARAM_ERL:
1389                 case ISCSI_PARAM_TARGET_NAME:
1390                 case ISCSI_PARAM_TPGT:
1391                 case ISCSI_PARAM_USERNAME:
1392                 case ISCSI_PARAM_PASSWORD:
1393                 case ISCSI_PARAM_USERNAME_IN:
1394                 case ISCSI_PARAM_PASSWORD_IN:
1395                 case ISCSI_PARAM_FAST_ABORT:
1396                 case ISCSI_PARAM_ABORT_TMO:
1397                 case ISCSI_PARAM_LU_RESET_TMO:
1398                 case ISCSI_PARAM_IFACE_NAME:
1399                 case ISCSI_PARAM_INITIATOR_NAME:
1400                         return S_IRUGO;
1401                 default:
1402                         return 0;
1403                 }
1404         }
1405
1406         return 0;
1407 }