aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/be2iscsi/be_iscsi.c
blob: 868cc5590145ca572eb723ddb1434f00e095f504 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
/**
 * Copyright (C) 2005 - 2010 ServerEngines
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.  The full GNU General
 * Public License is included in this distribution in the file called COPYING.
 *
 * Written by: Jayamohan Kallickal (jayamohank@serverengines.com)
 *
 * Contact Information:
 * linux-drivers@serverengines.com
 *
 * ServerEngines
 * 209 N. Fair Oaks Ave
 * Sunnyvale, CA 94085
 *
 */

#include <scsi/libiscsi.h>
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi.h>

#include "be_iscsi.h"

extern struct iscsi_transport beiscsi_iscsi_transport;

/**
 * beiscsi_session_create - creates a new iscsi session
 * @cmds_max: max commands supported
 * @qdepth: max queue depth supported
 * @initial_cmdsn: initial iscsi CMDSN
 */
struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
						 u16 cmds_max,
						 u16 qdepth,
						 u32 initial_cmdsn)
{
	struct Scsi_Host *shost;
	struct beiscsi_endpoint *beiscsi_ep;
	struct iscsi_cls_session *cls_session;
	struct beiscsi_hba *phba;
	struct iscsi_session *sess;
	struct beiscsi_session *beiscsi_sess;
	struct beiscsi_io_task *io_task;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n");

	if (!ep) {
		SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep\n");
		return NULL;
	}
	beiscsi_ep = ep->dd_data;
	phba = beiscsi_ep->phba;
	shost = phba->shost;
	if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
		shost_printk(KERN_ERR, shost, "Cannot handle %d cmds."
			     "Max cmds per session supported is %d. Using %d. "
			     "\n", cmds_max,
			      beiscsi_ep->phba->params.wrbs_per_cxn,
			      beiscsi_ep->phba->params.wrbs_per_cxn);
		cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
	}

	cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
					  shost, cmds_max,
					  sizeof(*beiscsi_sess),
					  sizeof(*io_task),
					  initial_cmdsn, ISCSI_MAX_TARGET);
	if (!cls_session)
		return NULL;
	sess = cls_session->dd_data;
	beiscsi_sess = sess->dd_data;
	beiscsi_sess->bhs_pool =  pci_pool_create("beiscsi_bhs_pool",
						   phba->pcidev,
						   sizeof(struct be_cmd_bhs),
						   64, 0);
	if (!beiscsi_sess->bhs_pool)
		goto destroy_sess;

	return cls_session;
destroy_sess:
	iscsi_session_teardown(cls_session);
	return NULL;
}

/**
 * beiscsi_session_destroy - destroys iscsi session
 * @cls_session:	pointer to iscsi cls session
 *
 * Destroys iSCSI session instance and releases
 * resources allocated for it.
 */
void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
{
	struct iscsi_session *sess = cls_session->dd_data;
	struct beiscsi_session *beiscsi_sess = sess->dd_data;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_session_destroy\n");
	pci_pool_destroy(beiscsi_sess->bhs_pool);
	iscsi_session_teardown(cls_session);
}

/**
 * beiscsi_conn_create - create an instance of iscsi connection
 * @cls_session: ptr to iscsi_cls_session
 * @cid: iscsi cid
 */
struct iscsi_cls_conn *
beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
{
	struct beiscsi_hba *phba;
	struct Scsi_Host *shost;
	struct iscsi_cls_conn *cls_conn;
	struct beiscsi_conn *beiscsi_conn;
	struct iscsi_conn *conn;
	struct iscsi_session *sess;
	struct beiscsi_session *beiscsi_sess;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid"
		 "from iscsi layer=%d\n", cid);
	shost = iscsi_session_to_shost(cls_session);
	phba = iscsi_host_priv(shost);

	cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
	if (!cls_conn)
		return NULL;

	conn = cls_conn->dd_data;
	beiscsi_conn = conn->dd_data;
	beiscsi_conn->ep = NULL;
	beiscsi_conn->phba = phba;
	beiscsi_conn->conn = conn;
	sess = cls_session->dd_data;
	beiscsi_sess = sess->dd_data;
	beiscsi_conn->beiscsi_sess = beiscsi_sess;
	return cls_conn;
}

/**
 * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table
 * @beiscsi_conn: The pointer to  beiscsi_conn structure
 * @phba: The phba instance
 * @cid: The cid to free
 */
static int beiscsi_bindconn_cid(struct beiscsi_hba *phba,
				struct beiscsi_conn *beiscsi_conn,
				unsigned int cid)
{
	if (phba->conn_table[cid]) {
		SE_DEBUG(DBG_LVL_1,
			 "Connection table already occupied. Detected clash\n");
		return -EINVAL;
	} else {
		SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn)\n",
			 cid, beiscsi_conn);
		phba->conn_table[cid] = beiscsi_conn;
	}
	return 0;
}

/**
 * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
 * @cls_session: pointer to iscsi cls session
 * @cls_conn: pointer to iscsi cls conn
 * @transport_fd: EP handle(64 bit)
 *
 * This function binds the TCP Conn with iSCSI Connection and Session.
 */
int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
		      struct iscsi_cls_conn *cls_conn,
		      u64 transport_fd, int is_leading)
{
	struct iscsi_conn *conn = cls_conn->dd_data;
	struct beiscsi_conn *beiscsi_conn = conn->dd_data;
	struct Scsi_Host *shost =
		(struct Scsi_Host *)iscsi_session_to_shost(cls_session);
	struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
	struct beiscsi_endpoint *beiscsi_ep;
	struct iscsi_endpoint *ep;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n");
	ep = iscsi_lookup_endpoint(transport_fd);
	if (!ep)
		return -EINVAL;

	beiscsi_ep = ep->dd_data;

	if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
		return -EINVAL;

	if (beiscsi_ep->phba != phba) {
		SE_DEBUG(DBG_LVL_8,
			 "beiscsi_ep->hba=%p not equal to phba=%p\n",
			 beiscsi_ep->phba, phba);
		return -EEXIST;
	}

	beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
	beiscsi_conn->ep = beiscsi_ep;
	beiscsi_ep->conn = beiscsi_conn;
	SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d\n",
		 beiscsi_conn, conn, beiscsi_ep->ep_cid);
	return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
}

/**
 * beiscsi_ep_get_param - get the iscsi parameter
 * @ep: pointer to iscsi ep
 * @param: parameter type identifier
 * @buf: buffer pointer
 *
 * returns iscsi parameter
 */
int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
			   enum iscsi_param param, char *buf)
{
	struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
	int len = 0;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param);

	switch (param) {
	case ISCSI_PARAM_CONN_PORT:
		len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
		break;
	case ISCSI_PARAM_CONN_ADDRESS:
		if (beiscsi_ep->ip_type == BE2_IPV4)
			len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
		else
			len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
		break;
	default:
		return -ENOSYS;
	}
	return len;
}

int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
		      enum iscsi_param param, char *buf, int buflen)
{
	struct iscsi_conn *conn = cls_conn->dd_data;
	struct iscsi_session *session = conn->session;
	int ret;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param);
	ret = iscsi_set_param(cls_conn, param, buf, buflen);
	if (ret)
		return ret;
	/*
	 * If userspace tried to set the value to higher than we can
	 * support override here.
	 */
	switch (param) {
	case ISCSI_PARAM_FIRST_BURST:
		if (session->first_burst > 8192)
			session->first_burst = 8192;
		break;
	case ISCSI_PARAM_MAX_RECV_DLENGTH:
		if (conn->max_recv_dlength > 65536)
			conn->max_recv_dlength = 65536;
		break;
	case ISCSI_PARAM_MAX_BURST:
		if (session->max_burst > 262144)
			session->max_burst = 262144;
		break;
	case ISCSI_PARAM_MAX_XMIT_DLENGTH:
		if ((conn->max_xmit_dlength > 65536) ||
		    (conn->max_xmit_dlength == 0))
			conn->max_xmit_dlength = 65536;
	default:
		return 0;
	}

	return 0;
}

/**
 * beiscsi_get_host_param - get the iscsi parameter
 * @shost: pointer to scsi_host structure
 * @param: parameter type identifier
 * @buf: buffer pointer
 *
 * returns host parameter
 */
int beiscsi_get_host_param(struct Scsi_Host *shost,
			   enum iscsi_host_param param, char *buf)
{
	struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
	int status = 0;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param);
	switch (param) {
	case ISCSI_HOST_PARAM_HWADDRESS:
		status = beiscsi_get_macaddr(buf, phba);
		if (status < 0) {
			SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n");
			return status;
		}
		break;
	default:
		return iscsi_host_get_param(shost, param, buf);
	}
	return status;
}

int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
{
	struct be_cmd_resp_get_mac_addr *resp;
	struct be_mcc_wrb *wrb;
	unsigned int tag, wrb_num;
	unsigned short status, extd_status;
	struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
	int rc;

	if (phba->read_mac_address)
		return sysfs_format_mac(buf, phba->mac_address,
					ETH_ALEN);

	tag = be_cmd_get_mac_addr(phba);
	if (!tag) {
		SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n");
		return -EBUSY;
	} else
		wait_event_interruptible(phba->ctrl.mcc_wait[tag],
					 phba->ctrl.mcc_numtag[tag]);

	wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
	extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
	status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
	if (status || extd_status) {
		SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr"
				    " status = %d extd_status = %d\n",
				    status, extd_status);
		free_mcc_tag(&phba->ctrl, tag);
		return -EAGAIN;
	}
	wrb = queue_get_wrb(mccq, wrb_num);
	free_mcc_tag(&phba->ctrl, tag);
	resp = embedded_payload(wrb);
	memcpy(phba->mac_address, resp->mac_address, ETH_ALEN);
	rc = sysfs_format_mac(buf, phba->mac_address,
			       ETH_ALEN);
	phba->read_mac_address = 1;
	return rc;
}


/**
 * beiscsi_conn_get_stats - get the iscsi stats
 * @cls_conn: pointer to iscsi cls conn
 * @stats: pointer to iscsi_stats structure
 *
 * returns iscsi stats
 */
void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
			    struct iscsi_stats *stats)
{
	struct iscsi_conn *conn = cls_conn->dd_data;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n");
	stats->txdata_octets = conn->txdata_octets;
	stats->rxdata_octets = conn->rxdata_octets;
	stats->dataout_pdus = conn->dataout_pdus_cnt;
	stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
	stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
	stats->datain_pdus = conn->datain_pdus_cnt;
	stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
	stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
	stats->r2t_pdus = conn->r2t_pdus_cnt;
	stats->digest_err = 0;
	stats->timeout_err = 0;
	stats->custom_length = 0;
	strcpy(stats->custom[0].desc, "eh_abort_cnt");
	stats->custom[0].value = conn->eh_abort_cnt;
}

/**
 * beiscsi_set_params_for_offld - get the parameters for offload
 * @beiscsi_conn: pointer to beiscsi_conn
 * @params: pointer to offload_params structure
 */
static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
					  struct beiscsi_offload_params *params)
{
	struct iscsi_conn *conn = beiscsi_conn->conn;
	struct iscsi_session *session = conn->session;

	AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
		      params, session->max_burst);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params,
		      max_send_data_segment_length, params,
		      conn->max_xmit_dlength);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
		      params, session->first_burst);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
		      session->erl);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
		      conn->datadgst_en);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
		      conn->hdrdgst_en);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
		      session->initial_r2t_en);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
		      session->imm_data_en);
	AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
		      (conn->exp_statsn - 1));
}

/**
 * beiscsi_conn_start - offload of session to chip
 * @cls_conn: pointer to beiscsi_conn
 */
int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
{
	struct iscsi_conn *conn = cls_conn->dd_data;
	struct beiscsi_conn *beiscsi_conn = conn->dd_data;
	struct beiscsi_endpoint *beiscsi_ep;
	struct beiscsi_offload_params params;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n");
	memset(&params, 0, sizeof(struct beiscsi_offload_params));
	beiscsi_ep = beiscsi_conn->ep;
	if (!beiscsi_ep)
		SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n");

	beiscsi_conn->login_in_progress = 0;
	beiscsi_set_params_for_offld(beiscsi_conn, &params);
	beiscsi_offload_connection(beiscsi_conn, &params);
	iscsi_conn_start(cls_conn);
	return 0;
}

/**
 * beiscsi_get_cid - Allocate a cid
 * @phba: The phba instance
 */
static int beiscsi_get_cid(struct beiscsi_hba *phba)
{
	unsigned short cid = 0xFFFF;

	if (!phba->avlbl_cids)
		return cid;

	cid = phba->cid_array[phba->cid_alloc++];
	if (phba->cid_alloc == phba->params.cxns_per_ctrl)
		phba->cid_alloc = 0;
	phba->avlbl_cids--;
	return cid;
}

/**
 * beiscsi_put_cid - Free the cid
 * @phba: The phba for which the cid is being freed
 * @cid: The cid to free
 */
static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
{
	phba->avlbl_cids++;
	phba->cid_array[phba->cid_free++] = cid;
	if (phba->cid_free == phba->params.cxns_per_ctrl)
		phba->cid_free = 0;
}

/**
 * beiscsi_free_ep - free endpoint
 * @ep:	pointer to iscsi endpoint structure
 */
static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
{
	struct beiscsi_hba *phba = beiscsi_ep->phba;

	beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
	beiscsi_ep->phba = NULL;
}

/**
 * beiscsi_open_conn - Ask FW to open a TCP connection
 * @ep:	endpoint to be used
 * @src_addr: The source IP address
 * @dst_addr: The Destination  IP address
 *
 * Asks the FW to open a TCP connection
 */
static int beiscsi_open_conn(struct iscsi_endpoint *ep,
			     struct sockaddr *src_addr,
			     struct sockaddr *dst_addr, int non_blocking)
{
	struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
	struct beiscsi_hba *phba = beiscsi_ep->phba;
	struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
	struct be_mcc_wrb *wrb;
	struct tcp_connect_and_offload_out *ptcpcnct_out;
	unsigned short status, extd_status;
	struct be_dma_mem nonemb_cmd;
	unsigned int tag, wrb_num;
	int ret = -ENOMEM;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n");
	beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
	if (beiscsi_ep->ep_cid == 0xFFFF) {
		SE_DEBUG(DBG_LVL_1, "No free cid available\n");
		return ret;
	}
	SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n",
		 beiscsi_ep->ep_cid);
	phba->ep_array[beiscsi_ep->ep_cid -
		       phba->fw_config.iscsi_cid_start] = ep;
	if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start +
				  phba->params.cxns_per_ctrl * 2)) {
		SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
		goto free_ep;
	}

	beiscsi_ep->cid_vld = 0;
	nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
				sizeof(struct tcp_connect_and_offload_in),
				&nonemb_cmd.dma);
	if (nonemb_cmd.va == NULL) {
		SE_DEBUG(DBG_LVL_1,
			 "Failed to allocate memory for mgmt_open_connection"
			 "\n");
		beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
		return -ENOMEM;
	}
	nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in);
	memset(nonemb_cmd.va, 0, nonemb_cmd.size);
	tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
	if (!tag) {
		SE_DEBUG(DBG_LVL_1,
			 "mgmt_open_connection Failed for cid=%d\n",
			 beiscsi_ep->ep_cid);
		beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
		pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
				    nonemb_cmd.va, nonemb_cmd.dma);
		return -EAGAIN;
	} else {
		wait_event_interruptible(phba->ctrl.mcc_wait[tag],
					 phba->ctrl.mcc_numtag[tag]);
	}
	wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
	extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
	status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
	if (status || extd_status) {
		SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed"
				    " status = %d extd_status = %d\n",
				    status, extd_status);
		free_mcc_tag(&phba->ctrl, tag);
		pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
			    nonemb_cmd.va, nonemb_cmd.dma);
		goto free_ep;
	} else {
		wrb = queue_get_wrb(mccq, wrb_num);
		free_mcc_tag(&phba->ctrl, tag);

		ptcpcnct_out = embedded_payload(wrb);
		beiscsi_ep = ep->dd_data;
		beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
		beiscsi_ep->cid_vld = 1;
		SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n");
	}
	pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
			    nonemb_cmd.va, nonemb_cmd.dma);
	return 0;

free_ep:
	beiscsi_free_ep(beiscsi_ep);
	return -EBUSY;
}

/**
 * beiscsi_ep_connect - Ask chip to create TCP Conn
 * @scsi_host: Pointer to scsi_host structure
 * @dst_addr: The IP address of Target
 * @non_blocking: blocking or non-blocking call
 *
 * This routines first asks chip to create a connection and then allocates an EP
 */
struct iscsi_endpoint *
beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
		   int non_blocking)
{
	struct beiscsi_hba *phba;
	struct beiscsi_endpoint *beiscsi_ep;
	struct iscsi_endpoint *ep;
	int ret;

	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n");
	if (shost)
		phba = iscsi_host_priv(shost);
	else {
		ret = -ENXIO;
		SE_DEBUG(DBG_LVL_1, "shost is NULL\n");
		return ERR_PTR(ret);
	}

	if (phba->state != BE_ADAPTER_UP) {
		ret = -EBUSY;
		SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n");
		return ERR_PTR(ret);
	}

	ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
	if (!ep) {
		ret = -ENOMEM;
		return ERR_PTR(ret);
	}

	beiscsi_ep = ep->dd_data;
	beiscsi_ep->phba = phba;
	beiscsi_ep->openiscsi_ep = ep;
	ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
	if (ret) {
		SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n");
		goto free_ep;
	}

	return ep;

free_ep:
	iscsi_destroy_endpoint(ep);
	return ERR_PTR(ret);
}

/**
 * beiscsi_ep_poll - Poll to see if connection is established
 * @ep:	endpoint to be used
 * @timeout_ms: timeout specified in millisecs
 *
 * Poll to see if TCP connection established
 */
int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
{
	struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;

	SE_DEBUG(DBG_LVL_8, "In  beiscsi_ep_poll\n");
	if (beiscsi_ep->cid_vld == 1)
		return 1;
	else
		return 0;
}

/**
 * beiscsi_close_conn - Upload the  connection
 * @ep: The iscsi endpoint
 * @flag: The type of connection closure
 */
static int beiscsi_close_conn(struct  beiscsi_endpoint *beiscsi_ep, int flag)
{
	int ret = 0;
	unsigned int tag;
	struct beiscsi_hba *phba = beiscsi_ep->phba;

	tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
	if (!tag) {
		SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n",
			 beiscsi_ep->ep_cid);
		ret = -EAGAIN;
	} else {
		wait_event_interruptible(phba->ctrl.mcc_wait[tag],
					 phba->ctrl.mcc_numtag[tag]);
		free_mcc_tag(&phba->ctrl, tag);
	}
	return ret;
}

/**
 * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
 * @phba: The phba instance
 * @cid: The cid to free
 */
static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
				      unsigned int cid)
{
	if (phba->conn_table[cid])
		phba->conn_table[cid] = NULL;
	else {
		SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n");
		return -EINVAL;
	}
	return 0;
}

/**
 * beiscsi_ep_disconnect - Tears down the TCP connection
 * @ep:	endpoint to be used
 *
 * Tears down the TCP connection
 */
void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
{
	struct beiscsi_conn *beiscsi_conn;
	struct beiscsi_endpoint *beiscsi_ep;
	struct beiscsi_hba *phba;
	unsigned int tag;
	unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;

	beiscsi_ep = ep->dd_data;
	phba = beiscsi_ep->phba;
	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n",
			     beiscsi_ep->ep_cid);

	if (!beiscsi_ep->conn) {
		SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no "
			 "beiscsi_ep\n");
		return;
	}
	beiscsi_conn = beiscsi_ep->conn;
	iscsi_suspend_queue(beiscsi_conn->conn);

	SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n",
		 beiscsi_ep->ep_cid);

	tag = mgmt_invalidate_connection(phba, beiscsi_ep,
					    beiscsi_ep->ep_cid, 1,
					    savecfg_flag);
	if (!tag) {
		SE_DEBUG(DBG_LVL_1,
			 "mgmt_invalidate_connection Failed for cid=%d\n",
			  beiscsi_ep->ep_cid);
	} else {
		wait_event_interruptible(phba->ctrl.mcc_wait[tag],
					 phba->ctrl.mcc_numtag[tag]);
		free_mcc_tag(&phba->ctrl, tag);
	}

	beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL);
	beiscsi_free_ep(beiscsi_ep);
	beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
	iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
}