Staging: strip: delete the driver
[linux/fpc-iii.git] / drivers / scsi / be2iscsi / be_iscsi.c
blobc3928cb8b04208c5dcddd915014c24e2ac3e4b51
1 /**
2 * Copyright (C) 2005 - 2010 ServerEngines
3 * All rights reserved.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation. The full GNU General
8 * Public License is included in this distribution in the file called COPYING.
10 * Written by: Jayamohan Kallickal (jayamohank@serverengines.com)
12 * Contact Information:
13 * linux-drivers@serverengines.com
15 * ServerEngines
16 * 209 N. Fair Oaks Ave
17 * Sunnyvale, CA 94085
21 #include <scsi/libiscsi.h>
22 #include <scsi/scsi_transport_iscsi.h>
23 #include <scsi/scsi_transport.h>
24 #include <scsi/scsi_cmnd.h>
25 #include <scsi/scsi_device.h>
26 #include <scsi/scsi_host.h>
27 #include <scsi/scsi.h>
29 #include "be_iscsi.h"
31 extern struct iscsi_transport beiscsi_iscsi_transport;
33 /**
34 * beiscsi_session_create - creates a new iscsi session
35 * @cmds_max: max commands supported
36 * @qdepth: max queue depth supported
37 * @initial_cmdsn: initial iscsi CMDSN
39 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
40 u16 cmds_max,
41 u16 qdepth,
42 u32 initial_cmdsn)
44 struct Scsi_Host *shost;
45 struct beiscsi_endpoint *beiscsi_ep;
46 struct iscsi_cls_session *cls_session;
47 struct beiscsi_hba *phba;
48 struct iscsi_session *sess;
49 struct beiscsi_session *beiscsi_sess;
50 struct beiscsi_io_task *io_task;
52 SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n");
54 if (!ep) {
55 SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep \n");
56 return NULL;
58 beiscsi_ep = ep->dd_data;
59 phba = beiscsi_ep->phba;
60 shost = phba->shost;
61 if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
62 shost_printk(KERN_ERR, shost, "Cannot handle %d cmds."
63 "Max cmds per session supported is %d. Using %d. "
64 "\n", cmds_max,
65 beiscsi_ep->phba->params.wrbs_per_cxn,
66 beiscsi_ep->phba->params.wrbs_per_cxn);
67 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
70 cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
71 shost, cmds_max,
72 sizeof(*beiscsi_sess),
73 sizeof(*io_task),
74 initial_cmdsn, ISCSI_MAX_TARGET);
75 if (!cls_session)
76 return NULL;
77 sess = cls_session->dd_data;
78 beiscsi_sess = sess->dd_data;
79 beiscsi_sess->bhs_pool = pci_pool_create("beiscsi_bhs_pool",
80 phba->pcidev,
81 sizeof(struct be_cmd_bhs),
82 64, 0);
83 if (!beiscsi_sess->bhs_pool)
84 goto destroy_sess;
86 return cls_session;
87 destroy_sess:
88 iscsi_session_teardown(cls_session);
89 return NULL;
92 /**
93 * beiscsi_session_destroy - destroys iscsi session
94 * @cls_session: pointer to iscsi cls session
96 * Destroys iSCSI session instance and releases
97 * resources allocated for it.
99 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
101 struct iscsi_session *sess = cls_session->dd_data;
102 struct beiscsi_session *beiscsi_sess = sess->dd_data;
104 SE_DEBUG(DBG_LVL_8, "In beiscsi_session_destroy\n");
105 pci_pool_destroy(beiscsi_sess->bhs_pool);
106 iscsi_session_teardown(cls_session);
110 * beiscsi_conn_create - create an instance of iscsi connection
111 * @cls_session: ptr to iscsi_cls_session
112 * @cid: iscsi cid
114 struct iscsi_cls_conn *
115 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
117 struct beiscsi_hba *phba;
118 struct Scsi_Host *shost;
119 struct iscsi_cls_conn *cls_conn;
120 struct beiscsi_conn *beiscsi_conn;
121 struct iscsi_conn *conn;
122 struct iscsi_session *sess;
123 struct beiscsi_session *beiscsi_sess;
125 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid"
126 "from iscsi layer=%d\n", cid);
127 shost = iscsi_session_to_shost(cls_session);
128 phba = iscsi_host_priv(shost);
130 cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
131 if (!cls_conn)
132 return NULL;
134 conn = cls_conn->dd_data;
135 beiscsi_conn = conn->dd_data;
136 beiscsi_conn->ep = NULL;
137 beiscsi_conn->phba = phba;
138 beiscsi_conn->conn = conn;
139 sess = cls_session->dd_data;
140 beiscsi_sess = sess->dd_data;
141 beiscsi_conn->beiscsi_sess = beiscsi_sess;
142 return cls_conn;
146 * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table
147 * @beiscsi_conn: The pointer to beiscsi_conn structure
148 * @phba: The phba instance
149 * @cid: The cid to free
151 static int beiscsi_bindconn_cid(struct beiscsi_hba *phba,
152 struct beiscsi_conn *beiscsi_conn,
153 unsigned int cid)
155 if (phba->conn_table[cid]) {
156 SE_DEBUG(DBG_LVL_1,
157 "Connection table already occupied. Detected clash\n");
158 return -EINVAL;
159 } else {
160 SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn) \n",
161 cid, beiscsi_conn);
162 phba->conn_table[cid] = beiscsi_conn;
164 return 0;
168 * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
169 * @cls_session: pointer to iscsi cls session
170 * @cls_conn: pointer to iscsi cls conn
171 * @transport_fd: EP handle(64 bit)
173 * This function binds the TCP Conn with iSCSI Connection and Session.
175 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
176 struct iscsi_cls_conn *cls_conn,
177 u64 transport_fd, int is_leading)
179 struct iscsi_conn *conn = cls_conn->dd_data;
180 struct beiscsi_conn *beiscsi_conn = conn->dd_data;
181 struct Scsi_Host *shost =
182 (struct Scsi_Host *)iscsi_session_to_shost(cls_session);
183 struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
184 struct beiscsi_endpoint *beiscsi_ep;
185 struct iscsi_endpoint *ep;
187 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n");
188 ep = iscsi_lookup_endpoint(transport_fd);
189 if (!ep)
190 return -EINVAL;
192 beiscsi_ep = ep->dd_data;
194 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
195 return -EINVAL;
197 if (beiscsi_ep->phba != phba) {
198 SE_DEBUG(DBG_LVL_8,
199 "beiscsi_ep->hba=%p not equal to phba=%p \n",
200 beiscsi_ep->phba, phba);
201 return -EEXIST;
204 beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
205 beiscsi_conn->ep = beiscsi_ep;
206 beiscsi_ep->conn = beiscsi_conn;
207 SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d \n",
208 beiscsi_conn, conn, beiscsi_ep->ep_cid);
209 return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
213 * beiscsi_conn_get_param - get the iscsi parameter
214 * @cls_conn: pointer to iscsi cls conn
215 * @param: parameter type identifier
216 * @buf: buffer pointer
218 * returns iscsi parameter
220 int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
221 enum iscsi_param param, char *buf)
223 struct beiscsi_endpoint *beiscsi_ep;
224 struct iscsi_conn *conn = cls_conn->dd_data;
225 struct beiscsi_conn *beiscsi_conn = conn->dd_data;
226 int len = 0;
228 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param);
229 beiscsi_ep = beiscsi_conn->ep;
230 if (!beiscsi_ep) {
231 SE_DEBUG(DBG_LVL_1,
232 "In beiscsi_conn_get_param , no beiscsi_ep\n");
233 return -1;
236 switch (param) {
237 case ISCSI_PARAM_CONN_PORT:
238 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
239 break;
240 case ISCSI_PARAM_CONN_ADDRESS:
241 if (beiscsi_ep->ip_type == BE2_IPV4)
242 len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
243 else
244 len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
245 break;
246 default:
247 return iscsi_conn_get_param(cls_conn, param, buf);
249 return len;
252 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
253 enum iscsi_param param, char *buf, int buflen)
255 struct iscsi_conn *conn = cls_conn->dd_data;
256 struct iscsi_session *session = conn->session;
257 int ret;
259 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param);
260 ret = iscsi_set_param(cls_conn, param, buf, buflen);
261 if (ret)
262 return ret;
264 * If userspace tried to set the value to higher than we can
265 * support override here.
267 switch (param) {
268 case ISCSI_PARAM_FIRST_BURST:
269 if (session->first_burst > 8192)
270 session->first_burst = 8192;
271 break;
272 case ISCSI_PARAM_MAX_RECV_DLENGTH:
273 if (conn->max_recv_dlength > 65536)
274 conn->max_recv_dlength = 65536;
275 break;
276 case ISCSI_PARAM_MAX_BURST:
277 if (session->max_burst > 262144)
278 session->max_burst = 262144;
279 break;
280 default:
281 return 0;
284 return 0;
288 * beiscsi_get_host_param - get the iscsi parameter
289 * @shost: pointer to scsi_host structure
290 * @param: parameter type identifier
291 * @buf: buffer pointer
293 * returns host parameter
295 int beiscsi_get_host_param(struct Scsi_Host *shost,
296 enum iscsi_host_param param, char *buf)
298 struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
299 struct be_cmd_resp_get_mac_addr *resp;
300 struct be_mcc_wrb *wrb;
301 unsigned int tag, wrb_num;
302 int len = 0;
303 unsigned short status, extd_status;
304 struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
306 SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param);
307 switch (param) {
308 case ISCSI_HOST_PARAM_HWADDRESS:
309 tag = be_cmd_get_mac_addr(phba);
310 if (!tag) {
311 SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed \n");
312 return -1;
313 } else
314 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
315 phba->ctrl.mcc_numtag[tag]);
317 wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
318 extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
319 status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
320 if (status || extd_status) {
321 SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed"
322 " status = %d extd_status = %d \n",
323 status, extd_status);
324 free_mcc_tag(&phba->ctrl, tag);
325 return -1;
326 } else {
327 wrb = queue_get_wrb(mccq, wrb_num);
328 free_mcc_tag(&phba->ctrl, tag);
329 resp = embedded_payload(wrb);
330 memcpy(phba->mac_address, resp->mac_address, ETH_ALEN);
331 len = sysfs_format_mac(buf, phba->mac_address,
332 ETH_ALEN);
334 break;
335 default:
336 return iscsi_host_get_param(shost, param, buf);
338 return len;
342 * beiscsi_conn_get_stats - get the iscsi stats
343 * @cls_conn: pointer to iscsi cls conn
344 * @stats: pointer to iscsi_stats structure
346 * returns iscsi stats
348 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
349 struct iscsi_stats *stats)
351 struct iscsi_conn *conn = cls_conn->dd_data;
353 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n");
354 stats->txdata_octets = conn->txdata_octets;
355 stats->rxdata_octets = conn->rxdata_octets;
356 stats->dataout_pdus = conn->dataout_pdus_cnt;
357 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
358 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
359 stats->datain_pdus = conn->datain_pdus_cnt;
360 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
361 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
362 stats->r2t_pdus = conn->r2t_pdus_cnt;
363 stats->digest_err = 0;
364 stats->timeout_err = 0;
365 stats->custom_length = 0;
366 strcpy(stats->custom[0].desc, "eh_abort_cnt");
367 stats->custom[0].value = conn->eh_abort_cnt;
371 * beiscsi_set_params_for_offld - get the parameters for offload
372 * @beiscsi_conn: pointer to beiscsi_conn
373 * @params: pointer to offload_params structure
375 static void beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
376 struct beiscsi_offload_params *params)
378 struct iscsi_conn *conn = beiscsi_conn->conn;
379 struct iscsi_session *session = conn->session;
381 AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
382 params, session->max_burst);
383 AMAP_SET_BITS(struct amap_beiscsi_offload_params,
384 max_send_data_segment_length, params,
385 conn->max_xmit_dlength);
386 AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
387 params, session->first_burst);
388 AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
389 session->erl);
390 AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
391 conn->datadgst_en);
392 AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
393 conn->hdrdgst_en);
394 AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
395 session->initial_r2t_en);
396 AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
397 session->imm_data_en);
398 AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
399 (conn->exp_statsn - 1));
403 * beiscsi_conn_start - offload of session to chip
404 * @cls_conn: pointer to beiscsi_conn
406 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
408 struct iscsi_conn *conn = cls_conn->dd_data;
409 struct beiscsi_conn *beiscsi_conn = conn->dd_data;
410 struct beiscsi_endpoint *beiscsi_ep;
411 struct beiscsi_offload_params params;
413 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n");
414 memset(&params, 0, sizeof(struct beiscsi_offload_params));
415 beiscsi_ep = beiscsi_conn->ep;
416 if (!beiscsi_ep)
417 SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n");
419 beiscsi_conn->login_in_progress = 0;
420 beiscsi_set_params_for_offld(beiscsi_conn, &params);
421 beiscsi_offload_connection(beiscsi_conn, &params);
422 iscsi_conn_start(cls_conn);
423 return 0;
427 * beiscsi_get_cid - Allocate a cid
428 * @phba: The phba instance
430 static int beiscsi_get_cid(struct beiscsi_hba *phba)
432 unsigned short cid = 0xFFFF;
434 if (!phba->avlbl_cids)
435 return cid;
437 cid = phba->cid_array[phba->cid_alloc++];
438 if (phba->cid_alloc == phba->params.cxns_per_ctrl)
439 phba->cid_alloc = 0;
440 phba->avlbl_cids--;
441 return cid;
445 * beiscsi_open_conn - Ask FW to open a TCP connection
446 * @ep: endpoint to be used
447 * @src_addr: The source IP address
448 * @dst_addr: The Destination IP address
450 * Asks the FW to open a TCP connection
452 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
453 struct sockaddr *src_addr,
454 struct sockaddr *dst_addr, int non_blocking)
456 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
457 struct beiscsi_hba *phba = beiscsi_ep->phba;
458 struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
459 struct be_mcc_wrb *wrb;
460 struct tcp_connect_and_offload_out *ptcpcnct_out;
461 unsigned short status, extd_status;
462 unsigned int tag, wrb_num;
463 int ret = -1;
465 SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n");
466 beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
467 if (beiscsi_ep->ep_cid == 0xFFFF) {
468 SE_DEBUG(DBG_LVL_1, "No free cid available\n");
469 return ret;
471 SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d ",
472 beiscsi_ep->ep_cid);
473 phba->ep_array[beiscsi_ep->ep_cid -
474 phba->fw_config.iscsi_cid_start] = ep;
475 if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start +
476 phba->params.cxns_per_ctrl * 2)) {
477 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
478 return ret;
481 beiscsi_ep->cid_vld = 0;
482 tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep);
483 if (!tag) {
484 SE_DEBUG(DBG_LVL_1,
485 "mgmt_open_connection Failed for cid=%d \n",
486 beiscsi_ep->ep_cid);
487 } else {
488 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
489 phba->ctrl.mcc_numtag[tag]);
491 wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
492 extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
493 status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
494 if (status || extd_status) {
495 SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed"
496 " status = %d extd_status = %d \n",
497 status, extd_status);
498 free_mcc_tag(&phba->ctrl, tag);
499 return -1;
500 } else {
501 wrb = queue_get_wrb(mccq, wrb_num);
502 free_mcc_tag(&phba->ctrl, tag);
504 ptcpcnct_out = embedded_payload(wrb);
505 beiscsi_ep = ep->dd_data;
506 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
507 beiscsi_ep->cid_vld = 1;
508 SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n");
510 return 0;
514 * beiscsi_put_cid - Free the cid
515 * @phba: The phba for which the cid is being freed
516 * @cid: The cid to free
518 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
520 phba->avlbl_cids++;
521 phba->cid_array[phba->cid_free++] = cid;
522 if (phba->cid_free == phba->params.cxns_per_ctrl)
523 phba->cid_free = 0;
527 * beiscsi_free_ep - free endpoint
528 * @ep: pointer to iscsi endpoint structure
530 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
532 struct beiscsi_hba *phba = beiscsi_ep->phba;
534 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
535 beiscsi_ep->phba = NULL;
539 * beiscsi_ep_connect - Ask chip to create TCP Conn
540 * @scsi_host: Pointer to scsi_host structure
541 * @dst_addr: The IP address of Target
542 * @non_blocking: blocking or non-blocking call
544 * This routines first asks chip to create a connection and then allocates an EP
546 struct iscsi_endpoint *
547 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
548 int non_blocking)
550 struct beiscsi_hba *phba;
551 struct beiscsi_endpoint *beiscsi_ep;
552 struct iscsi_endpoint *ep;
553 int ret;
555 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect \n");
556 if (shost)
557 phba = iscsi_host_priv(shost);
558 else {
559 ret = -ENXIO;
560 SE_DEBUG(DBG_LVL_1, "shost is NULL \n");
561 return ERR_PTR(ret);
564 if (phba->state != BE_ADAPTER_UP) {
565 ret = -EBUSY;
566 SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP \n");
567 return ERR_PTR(ret);
570 ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
571 if (!ep) {
572 ret = -ENOMEM;
573 return ERR_PTR(ret);
576 beiscsi_ep = ep->dd_data;
577 beiscsi_ep->phba = phba;
578 beiscsi_ep->openiscsi_ep = ep;
579 if (beiscsi_open_conn(ep, NULL, dst_addr, non_blocking)) {
580 SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn \n");
581 ret = -ENOMEM;
582 goto free_ep;
585 return ep;
587 free_ep:
588 beiscsi_free_ep(beiscsi_ep);
589 return ERR_PTR(ret);
593 * beiscsi_ep_poll - Poll to see if connection is established
594 * @ep: endpoint to be used
595 * @timeout_ms: timeout specified in millisecs
597 * Poll to see if TCP connection established
599 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
601 struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
603 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_poll\n");
604 if (beiscsi_ep->cid_vld == 1)
605 return 1;
606 else
607 return 0;
611 * beiscsi_close_conn - Upload the connection
612 * @ep: The iscsi endpoint
613 * @flag: The type of connection closure
615 static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag)
617 int ret = 0;
618 unsigned int tag;
619 struct beiscsi_hba *phba = beiscsi_ep->phba;
621 tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
622 if (!tag) {
623 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x",
624 beiscsi_ep->ep_cid);
625 ret = -1;
626 } else {
627 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
628 phba->ctrl.mcc_numtag[tag]);
629 free_mcc_tag(&phba->ctrl, tag);
631 return ret;
635 * beiscsi_ep_disconnect - Tears down the TCP connection
636 * @ep: endpoint to be used
638 * Tears down the TCP connection
640 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
642 struct beiscsi_conn *beiscsi_conn;
643 struct beiscsi_endpoint *beiscsi_ep;
644 struct beiscsi_hba *phba;
646 beiscsi_ep = ep->dd_data;
647 phba = beiscsi_ep->phba;
648 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n",
649 beiscsi_ep->ep_cid);
651 if (beiscsi_ep->conn) {
652 beiscsi_conn = beiscsi_ep->conn;
653 iscsi_suspend_queue(beiscsi_conn->conn);
659 * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
660 * @phba: The phba instance
661 * @cid: The cid to free
663 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
664 unsigned int cid)
666 if (phba->conn_table[cid])
667 phba->conn_table[cid] = NULL;
668 else {
669 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied. \n");
670 return -EINVAL;
672 return 0;
676 * beiscsi_conn_stop - Invalidate and stop the connection
677 * @cls_conn: pointer to get iscsi_conn
678 * @flag: The type of connection closure
680 void beiscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
682 struct iscsi_conn *conn = cls_conn->dd_data;
683 struct beiscsi_conn *beiscsi_conn = conn->dd_data;
684 struct beiscsi_endpoint *beiscsi_ep;
685 struct iscsi_session *session = conn->session;
686 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
687 struct beiscsi_hba *phba = iscsi_host_priv(shost);
688 unsigned int tag;
689 unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;
691 beiscsi_ep = beiscsi_conn->ep;
692 if (!beiscsi_ep) {
693 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop , no beiscsi_ep\n");
694 return;
696 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop ep_cid = %d\n",
697 beiscsi_ep->ep_cid);
698 tag = mgmt_invalidate_connection(phba, beiscsi_ep,
699 beiscsi_ep->ep_cid, 1,
700 savecfg_flag);
701 if (!tag) {
702 SE_DEBUG(DBG_LVL_1,
703 "mgmt_invalidate_connection Failed for cid=%d \n",
704 beiscsi_ep->ep_cid);
705 } else {
706 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
707 phba->ctrl.mcc_numtag[tag]);
708 free_mcc_tag(&phba->ctrl, tag);
710 beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL);
711 beiscsi_free_ep(beiscsi_ep);
712 iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
713 beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
714 iscsi_conn_stop(cls_conn, flag);