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[mirror_ubuntu-artful-kernel.git] / drivers / scsi / bnx2i / bnx2i_iscsi.c
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cf4e6363 1/*
f39a7757 2 * bnx2i_iscsi.c: QLogic NetXtreme II iSCSI driver.
cf4e6363 3 *
0b3bf387 4 * Copyright (c) 2006 - 2013 Broadcom Corporation
cf4e6363
MC		 5 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
6 * Copyright (c) 2007, 2008 Mike Christie
f39a7757 7 * Copyright (c) 2014, QLogic Corporation
cf4e6363
MC		 8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation.
12 *
13 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
f39a7757
VC		 14 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
15 * Maintained by: QLogic-Storage-Upstream@qlogic.com
cf4e6363
MC		 16 */
17
5a0e3ad6 18#include <linux/slab.h>
cf4e6363
MC		 19#include <scsi/scsi_tcq.h>
20#include <scsi/libiscsi.h>
21#include "bnx2i.h"
22
23struct scsi_transport_template *bnx2i_scsi_xport_template;
24struct iscsi_transport bnx2i_iscsi_transport;
25static struct scsi_host_template bnx2i_host_template;
26
27/*
28 * Global endpoint resource info
29 */
30static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
31
b5cf6b63 32DECLARE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
cf4e6363
MC		 33
34static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
35{
36 int retval = 0;
37
38 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
39 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
40 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
41 retval = -EPERM;
42 return retval;
43}
44
45/**
46 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
47 * @cmd: iscsi cmd struct pointer
48 * @buf_off: absolute buffer offset
49 * @start_bd_off: u32 pointer to return the offset within the BD
50 * indicated by 'start_bd_idx' on which 'buf_off' falls
51 * @start_bd_idx: index of the BD on which 'buf_off' falls
52 *
53 * identifies & marks various bd info for scsi command's imm data,
54 * unsolicited data and the first solicited data seq.
55 */
56static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
57 u32 *start_bd_off, u32 *start_bd_idx)
58{
59 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
60 u32 cur_offset = 0;
61 u32 cur_bd_idx = 0;
62
63 if (buf_off) {
64 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
65 cur_offset += bd_tbl->buffer_length;
66 cur_bd_idx++;
67 bd_tbl++;
68 }
69 }
70
71 *start_bd_off = buf_off - cur_offset;
72 *start_bd_idx = cur_bd_idx;
73}
74
75/**
76 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
77 * @task: transport layer's cmd struct pointer
78 *
79 * identifies & marks various bd info for scsi command's immediate data,
80 * unsolicited data and first solicited data seq which includes BD start
81 * index & BD buf off. his function takes into account iscsi parameter such
82 * as immediate data and unsolicited data is support on this connection.
83 */
84static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
85{
86 struct bnx2i_cmd *cmd = task->dd_data;
87 u32 start_bd_offset;
88 u32 start_bd_idx;
89 u32 buffer_offset = 0;
90 u32 cmd_len = cmd->req.total_data_transfer_length;
91
92 /* if ImmediateData is turned off & IntialR2T is turned on,
93 * there will be no immediate or unsolicited data, just return.
94 */
95 if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
96 return;
97
98 /* Immediate data */
99 buffer_offset += task->imm_count;
100 if (task->imm_count == cmd_len)
101 return;
102
103 if (iscsi_task_has_unsol_data(task)) {
104 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
105 &start_bd_offset, &start_bd_idx);
106 cmd->req.ud_buffer_offset = start_bd_offset;
107 cmd->req.ud_start_bd_index = start_bd_idx;
108 buffer_offset += task->unsol_r2t.data_length;
109 }
110
111 if (buffer_offset != cmd_len) {
112 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
113 &start_bd_offset, &start_bd_idx);
114 if ((start_bd_offset > task->conn->session->first_burst) ||
115 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
116 int i = 0;
117
118 iscsi_conn_printk(KERN_ALERT, task->conn,
119 "bnx2i- error, buf offset 0x%x "
120 "bd_valid %d use_sg %d\n",
121 buffer_offset, cmd->io_tbl.bd_valid,
122 scsi_sg_count(cmd->scsi_cmd));
123 for (i = 0; i < cmd->io_tbl.bd_valid; i++)
124 iscsi_conn_printk(KERN_ALERT, task->conn,
125 "bnx2i err, bd[%d]: len %x\n",
126 i, cmd->io_tbl.bd_tbl[i].\
127 buffer_length);
128 }
129 cmd->req.sd_buffer_offset = start_bd_offset;
130 cmd->req.sd_start_bd_index = start_bd_idx;
131 }
132}
133
134
135
136/**
137 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
138 * @hba: adapter instance
139 * @cmd: iscsi cmd struct pointer
140 *
141 * map SG list
142 */
143static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
144{
145 struct scsi_cmnd *sc = cmd->scsi_cmd;
146 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
147 struct scatterlist *sg;
148 int byte_count = 0;
149 int bd_count = 0;
150 int sg_count;
151 int sg_len;
152 u64 addr;
153 int i;
154
155 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
156
157 sg_count = scsi_dma_map(sc);
158
159 scsi_for_each_sg(sc, sg, sg_count, i) {
160 sg_len = sg_dma_len(sg);
161 addr = (u64) sg_dma_address(sg);
162 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
163 bd[bd_count].buffer_addr_hi = addr >> 32;
164 bd[bd_count].buffer_length = sg_len;
165 bd[bd_count].flags = 0;
166 if (bd_count == 0)
167 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
168
169 byte_count += sg_len;
170 bd_count++;
171 }
172
173 if (bd_count)
174 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
175
176 BUG_ON(byte_count != scsi_bufflen(sc));
177 return bd_count;
178}
179
180/**
181 * bnx2i_iscsi_map_sg_list - maps SG list
182 * @cmd: iscsi cmd struct pointer
183 *
184 * creates BD list table for the command
185 */
186static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
187{
188 int bd_count;
189
190 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
191 if (!bd_count) {
192 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
193
194 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
195 bd[0].buffer_length = bd[0].flags = 0;
196 }
197 cmd->io_tbl.bd_valid = bd_count;
198}
199
200
201/**
202 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
203 * @cmd: iscsi cmd struct pointer
204 *
205 * unmap IO buffers and invalidate the BD table
206 */
207void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
208{
209 struct scsi_cmnd *sc = cmd->scsi_cmd;
210
211 if (cmd->io_tbl.bd_valid && sc) {
212 scsi_dma_unmap(sc);
213 cmd->io_tbl.bd_valid = 0;
214 }
215}
216
217static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
218{
219 memset(&cmd->req, 0x00, sizeof(cmd->req));
220 cmd->req.op_code = 0xFF;
221 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
222 cmd->req.bd_list_addr_hi =
223 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
224
225}
226
227
228/**
229 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
230 * @hba: pointer to adapter instance
231 * @conn: pointer to iscsi connection
232 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
233 *
234 * update iscsi cid table entry with connection pointer. This enables
235 * driver to quickly get hold of connection structure pointer in
236 * completion/interrupt thread using iscsi context ID
237 */
238static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
239 struct bnx2i_conn *bnx2i_conn,
240 u32 iscsi_cid)
241{
242 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
243 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
244 "conn bind - entry #%d not free\n", iscsi_cid);
245 return -EBUSY;
246 }
247
248 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
249 return 0;
250}
251
252
253/**
254 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
255 * @hba: pointer to adapter instance
256 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
257 */
258struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
259 u16 iscsi_cid)
260{
261 if (!hba->cid_que.conn_cid_tbl) {
262 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
263 return NULL;
264
265 } else if (iscsi_cid >= hba->max_active_conns) {
266 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
267 return NULL;
268 }
269 return hba->cid_que.conn_cid_tbl[iscsi_cid];
270}
271
272
273/**
274 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
275 * @hba: pointer to adapter instance
276 */
277static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
278{
279 int idx;
280
281 if (!hba->cid_que.cid_free_cnt)
282 return -1;
283
284 idx = hba->cid_que.cid_q_cons_idx;
285 hba->cid_que.cid_q_cons_idx++;
286 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
287 hba->cid_que.cid_q_cons_idx = 0;
288
289 hba->cid_que.cid_free_cnt--;
290 return hba->cid_que.cid_que[idx];
291}
292
293
294/**
295 * bnx2i_free_iscsi_cid - returns tcp port to free list
296 * @hba: pointer to adapter instance
297 * @iscsi_cid: iscsi context ID to free
298 */
299static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
300{
301 int idx;
302
303 if (iscsi_cid == (u16) -1)
304 return;
305
306 hba->cid_que.cid_free_cnt++;
307
308 idx = hba->cid_que.cid_q_prod_idx;
309 hba->cid_que.cid_que[idx] = iscsi_cid;
310 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
311 hba->cid_que.cid_q_prod_idx++;
312 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
313 hba->cid_que.cid_q_prod_idx = 0;
314}
315
316
317/**
318 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
319 * @hba: pointer to adapter instance
320 *
321 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
322 * and initialize table attributes
323 */
324static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
325{
326 int mem_size;
327 int i;
328
329 mem_size = hba->max_active_conns * sizeof(u32);
330 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
331
332 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
333 if (!hba->cid_que.cid_que_base)
334 return -ENOMEM;
335
336 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
337 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
338 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
339 if (!hba->cid_que.conn_cid_tbl) {
340 kfree(hba->cid_que.cid_que_base);
341 hba->cid_que.cid_que_base = NULL;
342 return -ENOMEM;
343 }
344
345 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
346 hba->cid_que.cid_q_prod_idx = 0;
347 hba->cid_que.cid_q_cons_idx = 0;
348 hba->cid_que.cid_q_max_idx = hba->max_active_conns;
349 hba->cid_que.cid_free_cnt = hba->max_active_conns;
350
351 for (i = 0; i < hba->max_active_conns; i++) {
352 hba->cid_que.cid_que[i] = i;
353 hba->cid_que.conn_cid_tbl[i] = NULL;
354 }
355 return 0;
356}
357
358
359/**
360 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
361 * @hba: pointer to adapter instance
362 */
363static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
364{
365 kfree(hba->cid_que.cid_que_base);
366 hba->cid_que.cid_que_base = NULL;
367
368 kfree(hba->cid_que.conn_cid_tbl);
369 hba->cid_que.conn_cid_tbl = NULL;
370}
371
372
373/**
374 * bnx2i_alloc_ep - allocates ep structure from global pool
375 * @hba: pointer to adapter instance
376 *
377 * routine allocates a free endpoint structure from global pool and
378 * a tcp port to be used for this connection. Global resource lock,
379 * 'bnx2i_resc_lock' is held while accessing shared global data structures
380 */
381static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
382{
383 struct iscsi_endpoint *ep;
384 struct bnx2i_endpoint *bnx2i_ep;
9ae58e14 385 u32 ec_div;
cf4e6363
MC		 386
387 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
388 if (!ep) {
389 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
390 return NULL;
391 }
392
393 bnx2i_ep = ep->dd_data;
46012e8b 394 bnx2i_ep->cls_ep = ep;
cf4e6363
MC		 395 INIT_LIST_HEAD(&bnx2i_ep->link);
396 bnx2i_ep->state = EP_STATE_IDLE;
c19dcd01 397 bnx2i_ep->ep_iscsi_cid = (u16) -1;
cf4e6363
MC		 398 bnx2i_ep->hba = hba;
399 bnx2i_ep->hba_age = hba->age;
9ae58e14
EW		 400
401 ec_div = event_coal_div;
402 while (ec_div >>= 1)
403 bnx2i_ep->ec_shift += 1;
404
cf4e6363
MC		 405 hba->ofld_conns_active++;
406 init_waitqueue_head(&bnx2i_ep->ofld_wait);
407 return ep;
408}
409
410
411/**
412 * bnx2i_free_ep - free endpoint
413 * @ep: pointer to iscsi endpoint structure
414 */
415static void bnx2i_free_ep(struct iscsi_endpoint *ep)
416{
417 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
418 unsigned long flags;
419
420 spin_lock_irqsave(&bnx2i_resc_lock, flags);
421 bnx2i_ep->state = EP_STATE_IDLE;
422 bnx2i_ep->hba->ofld_conns_active--;
423
a91031a6
EW		 424 if (bnx2i_ep->ep_iscsi_cid != (u16) -1)
425 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
426
cf4e6363
MC		 427 if (bnx2i_ep->conn) {
428 bnx2i_ep->conn->ep = NULL;
429 bnx2i_ep->conn = NULL;
430 }
431
432 bnx2i_ep->hba = NULL;
433 spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
434 iscsi_destroy_endpoint(ep);
435}
436
437
438/**
439 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
440 * @hba: adapter instance pointer
441 * @session: iscsi session pointer
442 * @cmd: iscsi command structure
443 */
444static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
445 struct bnx2i_cmd *cmd)
446{
447 struct io_bdt *io = &cmd->io_tbl;
448 struct iscsi_bd *bd;
449
450 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
451 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
452 &io->bd_tbl_dma, GFP_KERNEL);
453 if (!io->bd_tbl) {
454 iscsi_session_printk(KERN_ERR, session, "Could not "
455 "allocate bdt.\n");
456 return -ENOMEM;
457 }
458 io->bd_valid = 0;
459 return 0;
460}
461
462/**
463 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
464 * @hba: adapter instance pointer
465 * @session: iscsi session pointer
466 * @cmd: iscsi command structure
467 */
468static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
469 struct iscsi_session *session)
470{
471 int i;
472
473 for (i = 0; i < session->cmds_max; i++) {
474 struct iscsi_task *task = session->cmds[i];
475 struct bnx2i_cmd *cmd = task->dd_data;
476
477 if (cmd->io_tbl.bd_tbl)
478 dma_free_coherent(&hba->pcidev->dev,
479 ISCSI_MAX_BDS_PER_CMD *
480 sizeof(struct iscsi_bd),
481 cmd->io_tbl.bd_tbl,
482 cmd->io_tbl.bd_tbl_dma);
483 }
484
485}
486
487
488/**
489 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
490 * @hba: adapter instance pointer
491 * @session: iscsi session pointer
492 */
493static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
494 struct iscsi_session *session)
495{
496 int i;
497
498 for (i = 0; i < session->cmds_max; i++) {
499 struct iscsi_task *task = session->cmds[i];
500 struct bnx2i_cmd *cmd = task->dd_data;
501
cf4e6363
MC		 502 task->hdr = &cmd->hdr;
503 task->hdr_max = sizeof(struct iscsi_hdr);
504
505 if (bnx2i_alloc_bdt(hba, session, cmd))
506 goto free_bdts;
507 }
508
509 return 0;
510
511free_bdts:
512 bnx2i_destroy_cmd_pool(hba, session);
513 return -ENOMEM;
514}
515
516
517/**
518 * bnx2i_setup_mp_bdt - allocate BD table resources
519 * @hba: pointer to adapter structure
520 *
521 * Allocate memory for dummy buffer and associated BD
522 * table to be used by middle path (MP) requests
523 */
524static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
525{
526 int rc = 0;
527 struct iscsi_bd *mp_bdt;
528 u64 addr;
529
be1fefc2 530 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
cf4e6363
MC		 531 &hba->mp_bd_dma, GFP_KERNEL);
532 if (!hba->mp_bd_tbl) {
533 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
534 rc = -1;
535 goto out;
536 }
537
be1fefc2
MC		 538 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev,
539 CNIC_PAGE_SIZE,
cf4e6363
MC		 540 &hba->dummy_buf_dma, GFP_KERNEL);
541 if (!hba->dummy_buffer) {
542 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
be1fefc2 543 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
cf4e6363
MC		 544 hba->mp_bd_tbl, hba->mp_bd_dma);
545 hba->mp_bd_tbl = NULL;
546 rc = -1;
547 goto out;
548 }
549
550 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
551 addr = (unsigned long) hba->dummy_buf_dma;
552 mp_bdt->buffer_addr_lo = addr & 0xffffffff;
553 mp_bdt->buffer_addr_hi = addr >> 32;
be1fefc2 554 mp_bdt->buffer_length = CNIC_PAGE_SIZE;
cf4e6363
MC		 555 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
556 ISCSI_BD_FIRST_IN_BD_CHAIN;
557out:
558 return rc;
559}
560
561
562/**
563 * bnx2i_free_mp_bdt - releases ITT back to free pool
564 * @hba: pointer to adapter instance
565 *
566 * free MP dummy buffer and associated BD table
567 */
568static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
569{
570 if (hba->mp_bd_tbl) {
be1fefc2 571 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
cf4e6363
MC		 572 hba->mp_bd_tbl, hba->mp_bd_dma);
573 hba->mp_bd_tbl = NULL;
574 }
575 if (hba->dummy_buffer) {
be1fefc2 576 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
cf4e6363
MC		 577 hba->dummy_buffer, hba->dummy_buf_dma);
578 hba->dummy_buffer = NULL;
579 }
580 return;
581}
582
583/**
584 * bnx2i_drop_session - notifies iscsid of connection error.
585 * @hba: adapter instance pointer
586 * @session: iscsi session pointer
587 *
588 * This notifies iscsid that there is a error, so it can initiate
589 * recovery.
590 *
591 * This relies on caller using the iscsi class iterator so the object
592 * is refcounted and does not disapper from under us.
593 */
594void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
595{
596 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
597}
598
599/**
600 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
601 * @hba: pointer to adapter instance
3f79410c 602 * @ep: pointer to endpoint (transport identifier) structure
cf4e6363
MC		 603 *
604 * EP destroy queue manager
605 */
606static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
607 struct bnx2i_endpoint *ep)
608{
609 write_lock_bh(&hba->ep_rdwr_lock);
610 list_add_tail(&ep->link, &hba->ep_destroy_list);
611 write_unlock_bh(&hba->ep_rdwr_lock);
612 return 0;
613}
614
615/**
616 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
617 *
618 * @hba: pointer to adapter instance
3f79410c 619 * @ep: pointer to endpoint (transport identifier) structure
cf4e6363
MC		 620 *
621 * EP destroy queue manager
622 */
623static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
624 struct bnx2i_endpoint *ep)
625{
626 write_lock_bh(&hba->ep_rdwr_lock);
627 list_del_init(&ep->link);
628 write_unlock_bh(&hba->ep_rdwr_lock);
629
630 return 0;
631}
632
633/**
634 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
635 * @hba: pointer to adapter instance
3f79410c 636 * @ep: pointer to endpoint (transport identifier) structure
cf4e6363
MC		 637 *
638 * pending conn offload completion queue manager
639 */
640static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
641 struct bnx2i_endpoint *ep)
642{
643 write_lock_bh(&hba->ep_rdwr_lock);
644 list_add_tail(&ep->link, &hba->ep_ofld_list);
645 write_unlock_bh(&hba->ep_rdwr_lock);
646 return 0;
647}
648
649/**
650 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
651 * @hba: pointer to adapter instance
3f79410c 652 * @ep: pointer to endpoint (transport identifier) structure
cf4e6363
MC		 653 *
654 * pending conn offload completion queue manager
655 */
656static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
657 struct bnx2i_endpoint *ep)
658{
659 write_lock_bh(&hba->ep_rdwr_lock);
660 list_del_init(&ep->link);
661 write_unlock_bh(&hba->ep_rdwr_lock);
662 return 0;
663}
664
665
666/**
667 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
668 *
669 * @hba: pointer to adapter instance
670 * @iscsi_cid: iscsi context ID to find
671 *
672 */
673struct bnx2i_endpoint *
674bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
675{
676 struct list_head *list;
677 struct list_head *tmp;
9c8a76d5 678 struct bnx2i_endpoint *ep = NULL;
cf4e6363
MC		 679
680 read_lock_bh(&hba->ep_rdwr_lock);
681 list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
682 ep = (struct bnx2i_endpoint *)list;
683
684 if (ep->ep_iscsi_cid == iscsi_cid)
685 break;
686 ep = NULL;
687 }
688 read_unlock_bh(&hba->ep_rdwr_lock);
689
690 if (!ep)
691 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
692 return ep;
693}
694
cf4e6363
MC		 695/**
696 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
697 * @hba: pointer to adapter instance
698 * @iscsi_cid: iscsi context ID to find
699 *
700 */
701struct bnx2i_endpoint *
702bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
703{
704 struct list_head *list;
705 struct list_head *tmp;
9c8a76d5 706 struct bnx2i_endpoint *ep = NULL;
cf4e6363
MC		 707
708 read_lock_bh(&hba->ep_rdwr_lock);
709 list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
710 ep = (struct bnx2i_endpoint *)list;
711
712 if (ep->ep_iscsi_cid == iscsi_cid)
713 break;
714 ep = NULL;
715 }
716 read_unlock_bh(&hba->ep_rdwr_lock);
717
718 if (!ep)
719 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
720
721 return ep;
722}
723
46012e8b
EW		 724/**
725 * bnx2i_ep_active_list_add - add an entry to ep active list
726 * @hba: pointer to adapter instance
3f79410c 727 * @ep: pointer to endpoint (transport identifier) structure
46012e8b
EW		 728 *
729 * current active conn queue manager
730 */
731static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
732 struct bnx2i_endpoint *ep)
733{
734 write_lock_bh(&hba->ep_rdwr_lock);
735 list_add_tail(&ep->link, &hba->ep_active_list);
736 write_unlock_bh(&hba->ep_rdwr_lock);
737}
738
739
740/**
741 * bnx2i_ep_active_list_del - deletes an entry to ep active list
742 * @hba: pointer to adapter instance
3f79410c 743 * @ep: pointer to endpoint (transport identifier) structure
46012e8b
EW		 744 *
745 * current active conn queue manager
746 */
747static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
748 struct bnx2i_endpoint *ep)
749{
750 write_lock_bh(&hba->ep_rdwr_lock);
751 list_del_init(&ep->link);
752 write_unlock_bh(&hba->ep_rdwr_lock);
753}
754
755
cf4e6363
MC		 756/**
757 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
758 * @hba: pointer to adapter instance
759 * @shost: scsi host pointer
760 *
761 * Initializes 'can_queue' parameter based on how many outstanding commands
762 * the device can handle. Each device 5708/5709/57710 has different
763 * capabilities
764 */
765static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
766 struct Scsi_Host *shost)
767{
768 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
769 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
770 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
771 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
772 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
773 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
774 else
775 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
776}
777
778
779/**
780 * bnx2i_alloc_hba - allocate and init adapter instance
781 * @cnic: cnic device pointer
782 *
783 * allocate & initialize adapter structure and call other
784 * support routines to do per adapter initialization
785 */
786struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
787{
788 struct Scsi_Host *shost;
789 struct bnx2i_hba *hba;
790
791 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
792 if (!shost)
793 return NULL;
794 shost->dma_boundary = cnic->pcidev->dma_mask;
795 shost->transportt = bnx2i_scsi_xport_template;
796 shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
797 shost->max_channel = 0;
798 shost->max_lun = 512;
799 shost->max_cmd_len = 16;
800
801 hba = iscsi_host_priv(shost);
802 hba->shost = shost;
803 hba->netdev = cnic->netdev;
804 /* Get PCI related information and update hba struct members */
805 hba->pcidev = cnic->pcidev;
806 pci_dev_get(hba->pcidev);
807 hba->pci_did = hba->pcidev->device;
808 hba->pci_vid = hba->pcidev->vendor;
809 hba->pci_sdid = hba->pcidev->subsystem_device;
810 hba->pci_svid = hba->pcidev->subsystem_vendor;
811 hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
812 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
cf4e6363 813
b83908ce 814 bnx2i_identify_device(hba, cnic);
cf4e6363
MC		 815 bnx2i_setup_host_queue_size(hba, shost);
816
a7717180 817 hba->reg_base = pci_resource_start(hba->pcidev, 0);
cf4e6363 818 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
a7717180 819 hba->regview = pci_iomap(hba->pcidev, 0, BNX2_MQ_CONFIG2);
cf4e6363
MC		 820 if (!hba->regview)
821 goto ioreg_map_err;
822 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
a7717180 823 hba->regview = pci_iomap(hba->pcidev, 0, 4096);
cf4e6363
MC		 824 if (!hba->regview)
825 goto ioreg_map_err;
826 }
827
828 if (bnx2i_setup_mp_bdt(hba))
829 goto mp_bdt_mem_err;
830
831 INIT_LIST_HEAD(&hba->ep_ofld_list);
46012e8b 832 INIT_LIST_HEAD(&hba->ep_active_list);
cf4e6363
MC		 833 INIT_LIST_HEAD(&hba->ep_destroy_list);
834 rwlock_init(&hba->ep_rdwr_lock);
835
836 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
837
838 /* different values for 5708/5709/57710 */
839 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
840
841 if (bnx2i_setup_free_cid_que(hba))
842 goto cid_que_err;
843
844 /* SQ/RQ/CQ size can be changed via sysfx interface */
845 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
846 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
847 hba->max_sqes = sq_size;
848 else
849 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
850 } else { /* 5706/5708/5709 */
851 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
852 hba->max_sqes = sq_size;
853 else
854 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
855 }
856
857 hba->max_rqes = rq_size;
858 hba->max_cqes = hba->max_sqes + rq_size;
859 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
860 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
861 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
862 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
863 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
864
865 hba->num_ccell = hba->max_sqes / 2;
866
867 spin_lock_init(&hba->lock);
868 mutex_init(&hba->net_dev_lock);
490475a9 869 init_waitqueue_head(&hba->eh_wait);
e37d2c47 870 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
d5307a07 871 hba->hba_shutdown_tmo = 30 * HZ;
e37d2c47
EW		 872 hba->conn_teardown_tmo = 20 * HZ;
873 hba->conn_ctx_destroy_tmo = 6 * HZ;
874 } else { /* 5706/5708/5709 */
55e15c97 875 hba->hba_shutdown_tmo = 20 * HZ;
e37d2c47
EW		 876 hba->conn_teardown_tmo = 10 * HZ;
877 hba->conn_ctx_destroy_tmo = 2 * HZ;
878 }
cf4e6363 879
2e499d3c
BW		 880#ifdef CONFIG_32BIT
881 spin_lock_init(&hba->stat_lock);
882#endif
883 memset(&hba->stats, 0, sizeof(struct iscsi_stats_info));
884
cf4e6363
MC		 885 if (iscsi_host_add(shost, &hba->pcidev->dev))
886 goto free_dump_mem;
887 return hba;
888
889free_dump_mem:
890 bnx2i_release_free_cid_que(hba);
891cid_que_err:
892 bnx2i_free_mp_bdt(hba);
893mp_bdt_mem_err:
894 if (hba->regview) {
a7717180 895 pci_iounmap(hba->pcidev, hba->regview);
cf4e6363
MC		 896 hba->regview = NULL;
897 }
898ioreg_map_err:
899 pci_dev_put(hba->pcidev);
900 scsi_host_put(shost);
901 return NULL;
902}
903
904/**
905 * bnx2i_free_hba- releases hba structure and resources held by the adapter
906 * @hba: pointer to adapter instance
907 *
908 * free adapter structure and call various cleanup routines.
909 */
910void bnx2i_free_hba(struct bnx2i_hba *hba)
911{
912 struct Scsi_Host *shost = hba->shost;
913
914 iscsi_host_remove(shost);
915 INIT_LIST_HEAD(&hba->ep_ofld_list);
46012e8b 916 INIT_LIST_HEAD(&hba->ep_active_list);
cf4e6363
MC		 917 INIT_LIST_HEAD(&hba->ep_destroy_list);
918 pci_dev_put(hba->pcidev);
919
920 if (hba->regview) {
a7717180 921 pci_iounmap(hba->pcidev, hba->regview);
cf4e6363
MC		 922 hba->regview = NULL;
923 }
924 bnx2i_free_mp_bdt(hba);
925 bnx2i_release_free_cid_que(hba);
926 iscsi_host_free(shost);
927}
928
929/**
930 * bnx2i_conn_free_login_resources - free DMA resources used for login process
931 * @hba: pointer to adapter instance
932 * @bnx2i_conn: iscsi connection pointer
933 *
934 * Login related resources, mostly BDT & payload DMA memory is freed
935 */
936static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
937 struct bnx2i_conn *bnx2i_conn)
938{
939 if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
be1fefc2 940 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
cf4e6363
MC		 941 bnx2i_conn->gen_pdu.resp_bd_tbl,
942 bnx2i_conn->gen_pdu.resp_bd_dma);
943 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
944 }
945
946 if (bnx2i_conn->gen_pdu.req_bd_tbl) {
be1fefc2 947 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
cf4e6363
MC		 948 bnx2i_conn->gen_pdu.req_bd_tbl,
949 bnx2i_conn->gen_pdu.req_bd_dma);
950 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
951 }
952
953 if (bnx2i_conn->gen_pdu.resp_buf) {
954 dma_free_coherent(&hba->pcidev->dev,
955 ISCSI_DEF_MAX_RECV_SEG_LEN,
956 bnx2i_conn->gen_pdu.resp_buf,
957 bnx2i_conn->gen_pdu.resp_dma_addr);
958 bnx2i_conn->gen_pdu.resp_buf = NULL;
959 }
960
961 if (bnx2i_conn->gen_pdu.req_buf) {
962 dma_free_coherent(&hba->pcidev->dev,
963 ISCSI_DEF_MAX_RECV_SEG_LEN,
964 bnx2i_conn->gen_pdu.req_buf,
965 bnx2i_conn->gen_pdu.req_dma_addr);
966 bnx2i_conn->gen_pdu.req_buf = NULL;
967 }
968}
969
970/**
971 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
972 * @hba: pointer to adapter instance
973 * @bnx2i_conn: iscsi connection pointer
974 *
975 * Mgmt task DNA resources are allocated in this routine.
976 */
977static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
978 struct bnx2i_conn *bnx2i_conn)
979{
980 /* Allocate memory for login request/response buffers */
981 bnx2i_conn->gen_pdu.req_buf =
982 dma_alloc_coherent(&hba->pcidev->dev,
983 ISCSI_DEF_MAX_RECV_SEG_LEN,
984 &bnx2i_conn->gen_pdu.req_dma_addr,
985 GFP_KERNEL);
986 if (bnx2i_conn->gen_pdu.req_buf == NULL)
987 goto login_req_buf_failure;
988
989 bnx2i_conn->gen_pdu.req_buf_size = 0;
990 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
991
992 bnx2i_conn->gen_pdu.resp_buf =
993 dma_alloc_coherent(&hba->pcidev->dev,
994 ISCSI_DEF_MAX_RECV_SEG_LEN,
995 &bnx2i_conn->gen_pdu.resp_dma_addr,
996 GFP_KERNEL);
997 if (bnx2i_conn->gen_pdu.resp_buf == NULL)
998 goto login_resp_buf_failure;
999
1000 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
1001 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
1002
1003 bnx2i_conn->gen_pdu.req_bd_tbl =
be1fefc2 1004 dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
cf4e6363
MC		 1005 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
1006 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
1007 goto login_req_bd_tbl_failure;
1008
1009 bnx2i_conn->gen_pdu.resp_bd_tbl =
be1fefc2 1010 dma_alloc_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
cf4e6363
MC		 1011 &bnx2i_conn->gen_pdu.resp_bd_dma,
1012 GFP_KERNEL);
1013 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
1014 goto login_resp_bd_tbl_failure;
1015
1016 return 0;
1017
1018login_resp_bd_tbl_failure:
be1fefc2 1019 dma_free_coherent(&hba->pcidev->dev, CNIC_PAGE_SIZE,
cf4e6363
MC		 1020 bnx2i_conn->gen_pdu.req_bd_tbl,
1021 bnx2i_conn->gen_pdu.req_bd_dma);
1022 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1023
1024login_req_bd_tbl_failure:
1025 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1026 bnx2i_conn->gen_pdu.resp_buf,
1027 bnx2i_conn->gen_pdu.resp_dma_addr);
1028 bnx2i_conn->gen_pdu.resp_buf = NULL;
1029login_resp_buf_failure:
1030 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1031 bnx2i_conn->gen_pdu.req_buf,
1032 bnx2i_conn->gen_pdu.req_dma_addr);
1033 bnx2i_conn->gen_pdu.req_buf = NULL;
1034login_req_buf_failure:
1035 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1036 "login resource alloc failed!!\n");
1037 return -ENOMEM;
1038
1039}
1040
1041
1042/**
1043 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1044 * @bnx2i_conn: iscsi connection pointer
1045 *
1046 * Allocates buffers and BD tables before shipping requests to cnic
1047 * for PDUs prepared by 'iscsid' daemon
1048 */
1049static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1050{
1051 struct iscsi_bd *bd_tbl;
1052
1053 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1054
1055 bd_tbl->buffer_addr_hi =
1056 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1057 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1058 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1059 bnx2i_conn->gen_pdu.req_buf;
1060 bd_tbl->reserved0 = 0;
1061 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1062 ISCSI_BD_FIRST_IN_BD_CHAIN;
1063
1064 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1065 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1066 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1067 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1068 bd_tbl->reserved0 = 0;
1069 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1070 ISCSI_BD_FIRST_IN_BD_CHAIN;
1071}
1072
1073
1074/**
1075 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1076 * @task: transport layer task pointer
1077 *
1078 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1079 * Nop-out and Logout requests flow through this path.
1080 */
1081static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1082{
1083 struct bnx2i_cmd *cmd = task->dd_data;
1084 struct bnx2i_conn *bnx2i_conn = cmd->conn;
1085 int rc = 0;
1086 char *buf;
1087 int data_len;
1088
1089 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1090 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1091 case ISCSI_OP_LOGIN:
1092 bnx2i_send_iscsi_login(bnx2i_conn, task);
1093 break;
1094 case ISCSI_OP_NOOP_OUT:
1095 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1096 buf = bnx2i_conn->gen_pdu.req_buf;
1097 if (data_len)
1098 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
cf4e6363
MC		 1099 buf, data_len, 1);
1100 else
1101 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
cf4e6363
MC		 1102 NULL, 0, 1);
1103 break;
1104 case ISCSI_OP_LOGOUT:
1105 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1106 break;
1107 case ISCSI_OP_SCSI_TMFUNC:
1108 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1109 break;
09813ba5
EW		 1110 case ISCSI_OP_TEXT:
1111 rc = bnx2i_send_iscsi_text(bnx2i_conn, task);
1112 break;
cf4e6363
MC		 1113 default:
1114 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1115 "send_gen: unsupported op 0x%x\n",
1116 task->hdr->opcode);
1117 }
1118 return rc;
1119}
1120
1121
1122/**********************************************************************
1123 * SCSI-ML Interface
1124 **********************************************************************/
1125
1126/**
1127 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1128 * @sc: SCSI-ML command pointer
1129 * @cmd: iscsi cmd pointer
1130 */
1131static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1132{
1133 u32 dword;
1134 int lpcnt;
1135 u8 *srcp;
1136 u32 *dstp;
1137 u32 scsi_lun[2];
1138
1139 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1140 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1141 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1142
1143 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1144 srcp = (u8 *) sc->cmnd;
1145 dstp = (u32 *) cmd->req.cdb;
1146 while (lpcnt--) {
1147 memcpy(&dword, (const void *) srcp, 4);
1148 *dstp = cpu_to_be32(dword);
1149 srcp += 4;
1150 dstp++;
1151 }
1152 if (sc->cmd_len & 0x3) {
1153 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1154 *dstp = cpu_to_be32(dword);
1155 }
1156}
1157
1158static void bnx2i_cleanup_task(struct iscsi_task *task)
1159{
1160 struct iscsi_conn *conn = task->conn;
1161 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1162 struct bnx2i_hba *hba = bnx2i_conn->hba;
1163
1164 /*
1165 * mgmt task or cmd was never sent to us to transmit.
1166 */
1167 if (!task->sc || task->state == ISCSI_TASK_PENDING)
1168 return;
1169 /*
1170 * need to clean-up task context to claim dma buffers
1171 */
1172 if (task->state == ISCSI_TASK_ABRT_TMF) {
1173 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1174
659743b0 1175 spin_unlock_bh(&conn->session->back_lock);
35843048 1176 spin_unlock_bh(&conn->session->frwd_lock);
cf4e6363
MC		 1177 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1178 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
35843048 1179 spin_lock_bh(&conn->session->frwd_lock);
659743b0 1180 spin_lock_bh(&conn->session->back_lock);
cf4e6363
MC		 1181 }
1182 bnx2i_iscsi_unmap_sg_list(task->dd_data);
1183}
1184
1185/**
1186 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1187 * @conn: transport layer conn structure pointer
1188 * @task: transport layer command structure pointer
1189 */
1190static int
1191bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1192{
1193 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
2e499d3c 1194 struct bnx2i_hba *hba = bnx2i_conn->hba;
cf4e6363
MC		 1195 struct bnx2i_cmd *cmd = task->dd_data;
1196
1197 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1198
1199 bnx2i_setup_cmd_wqe_template(cmd);
1200 bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
2e499d3c
BW		 1201
1202 /* Tx PDU/data length count */
1203 ADD_STATS_64(hba, tx_pdus, 1);
1204 ADD_STATS_64(hba, tx_bytes, task->data_count);
1205
cf4e6363
MC		 1206 if (task->data_count) {
1207 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1208 task->data_count);
1209 bnx2i_conn->gen_pdu.req_wr_ptr =
1210 bnx2i_conn->gen_pdu.req_buf + task->data_count;
1211 }
1212 cmd->conn = conn->dd_data;
1213 cmd->scsi_cmd = NULL;
1214 return bnx2i_iscsi_send_generic_request(task);
1215}
1216
1217/**
1218 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1219 * @task: transport layer command structure pointer
1220 *
1221 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1222 */
1223static int bnx2i_task_xmit(struct iscsi_task *task)
1224{
1225 struct iscsi_conn *conn = task->conn;
1226 struct iscsi_session *session = conn->session;
1227 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1228 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1229 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1230 struct scsi_cmnd *sc = task->sc;
1231 struct bnx2i_cmd *cmd = task->dd_data;
12352183 1232 struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr;
cf4e6363 1233
b5cf6b63
EW		 1234 if (atomic_read(&bnx2i_conn->ep->num_active_cmds) + 1 >
1235 hba->max_sqes)
7287c63e
EW		 1236 return -ENOMEM;
1237
cf4e6363
MC		 1238 /*
1239 * If there is no scsi_cmnd this must be a mgmt task
1240 */
1241 if (!sc)
1242 return bnx2i_mtask_xmit(conn, task);
1243
1244 bnx2i_setup_cmd_wqe_template(cmd);
1245 cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1246 cmd->conn = bnx2i_conn;
1247 cmd->scsi_cmd = sc;
1248 cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1249 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1250
1251 bnx2i_iscsi_map_sg_list(cmd);
1252 bnx2i_cpy_scsi_cdb(sc, cmd);
1253
1254 cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1255 if (sc->sc_data_direction == DMA_TO_DEVICE) {
1256 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1257 cmd->req.itt = task->itt |
1258 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1259 bnx2i_setup_write_cmd_bd_info(task);
1260 } else {
1261 if (scsi_bufflen(sc))
1262 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1263 cmd->req.itt = task->itt |
1264 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1265 }
1266
1267 cmd->req.num_bds = cmd->io_tbl.bd_valid;
1268 if (!cmd->io_tbl.bd_valid) {
1269 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1270 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1271 cmd->req.num_bds = 1;
1272 }
1273
1274 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1275 return 0;
1276}
1277
1278/**
1279 * bnx2i_session_create - create a new iscsi session
1280 * @cmds_max: max commands supported
1281 * @qdepth: scsi queue depth to support
1282 * @initial_cmdsn: initial iscsi CMDSN to be used for this session
1283 *
1284 * Creates a new iSCSI session instance on given device.
1285 */
1286static struct iscsi_cls_session *
1287bnx2i_session_create(struct iscsi_endpoint *ep,
1288 uint16_t cmds_max, uint16_t qdepth,
1289 uint32_t initial_cmdsn)
1290{
1291 struct Scsi_Host *shost;
1292 struct iscsi_cls_session *cls_session;
1293 struct bnx2i_hba *hba;
1294 struct bnx2i_endpoint *bnx2i_ep;
1295
1296 if (!ep) {
1297 printk(KERN_ERR "bnx2i: missing ep.\n");
1298 return NULL;
1299 }
1300
1301 bnx2i_ep = ep->dd_data;
1302 shost = bnx2i_ep->hba->shost;
1303 hba = iscsi_host_priv(shost);
1304 if (bnx2i_adapter_ready(hba))
1305 return NULL;
1306
1307 /*
1308 * user can override hw limit as long as it is within
1309 * the min/max.
1310 */
1311 if (cmds_max > hba->max_sqes)
1312 cmds_max = hba->max_sqes;
1313 else if (cmds_max < BNX2I_SQ_WQES_MIN)
1314 cmds_max = BNX2I_SQ_WQES_MIN;
1315
1316 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
b8b9e1b8 1317 cmds_max, 0, sizeof(struct bnx2i_cmd),
cf4e6363
MC		 1318 initial_cmdsn, ISCSI_MAX_TARGET);
1319 if (!cls_session)
1320 return NULL;
1321
1322 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1323 goto session_teardown;
1324 return cls_session;
1325
1326session_teardown:
1327 iscsi_session_teardown(cls_session);
1328 return NULL;
1329}
1330
1331
1332/**
1333 * bnx2i_session_destroy - destroys iscsi session
1334 * @cls_session: pointer to iscsi cls session
1335 *
1336 * Destroys previously created iSCSI session instance and releases
1337 * all resources held by it
1338 */
1339static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1340{
1341 struct iscsi_session *session = cls_session->dd_data;
1342 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1343 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1344
1345 bnx2i_destroy_cmd_pool(hba, session);
1346 iscsi_session_teardown(cls_session);
1347}
1348
1349
1350/**
1351 * bnx2i_conn_create - create iscsi connection instance
1352 * @cls_session: pointer to iscsi cls session
1353 * @cid: iscsi cid as per rfc (not NX2's CID terminology)
1354 *
1355 * Creates a new iSCSI connection instance for a given session
1356 */
1357static struct iscsi_cls_conn *
1358bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1359{
1360 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1361 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1362 struct bnx2i_conn *bnx2i_conn;
1363 struct iscsi_cls_conn *cls_conn;
1364 struct iscsi_conn *conn;
1365
1366 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1367 cid);
1368 if (!cls_conn)
1369 return NULL;
1370 conn = cls_conn->dd_data;
1371
1372 bnx2i_conn = conn->dd_data;
1373 bnx2i_conn->cls_conn = cls_conn;
1374 bnx2i_conn->hba = hba;
b5cf6b63
EW		 1375
1376 atomic_set(&bnx2i_conn->work_cnt, 0);
1377
cf4e6363
MC		 1378 /* 'ep' ptr will be assigned in bind() call */
1379 bnx2i_conn->ep = NULL;
1380 init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1381
1382 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1383 iscsi_conn_printk(KERN_ALERT, conn,
1384 "conn_new: login resc alloc failed!!\n");
1385 goto free_conn;
1386 }
1387
1388 return cls_conn;
1389
1390free_conn:
1391 iscsi_conn_teardown(cls_conn);
1392 return NULL;
1393}
1394
1395/**
1396 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1397 * @cls_session: pointer to iscsi cls session
1398 * @cls_conn: pointer to iscsi cls conn
1399 * @transport_fd: 64-bit EP handle
1400 * @is_leading: leading connection on this session?
1401 *
1402 * Binds together iSCSI session instance, iSCSI connection instance
1403 * and the TCP connection. This routine returns error code if
1404 * TCP connection does not belong on the device iSCSI sess/conn
1405 * is bound
1406 */
1407static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1408 struct iscsi_cls_conn *cls_conn,
1409 uint64_t transport_fd, int is_leading)
1410{
1411 struct iscsi_conn *conn = cls_conn->dd_data;
1412 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1413 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1414 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1415 struct bnx2i_endpoint *bnx2i_ep;
1416 struct iscsi_endpoint *ep;
1417 int ret_code;
1418
1419 ep = iscsi_lookup_endpoint(transport_fd);
1420 if (!ep)
1421 return -EINVAL;
842158d7
EW		 1422 /*
1423 * Forcefully terminate all in progress connection recovery at the
1424 * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1425 */
1426 if (bnx2i_adapter_ready(hba))
1427 return -EIO;
cf4e6363
MC		 1428
1429 bnx2i_ep = ep->dd_data;
1430 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1431 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1432 /* Peer disconnect via' FIN or RST */
1433 return -EINVAL;
1434
1435 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1436 return -EINVAL;
1437
1438 if (bnx2i_ep->hba != hba) {
1439 /* Error - TCP connection does not belong to this device
1440 */
1441 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1442 "conn bind, ep=0x%p (%s) does not",
1443 bnx2i_ep, bnx2i_ep->hba->netdev->name);
1444 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1445 "belong to hba (%s)\n",
1446 hba->netdev->name);
1447 return -EEXIST;
1448 }
cf4e6363
MC		 1449 bnx2i_ep->conn = bnx2i_conn;
1450 bnx2i_conn->ep = bnx2i_ep;
1451 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1452 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
cf4e6363
MC		 1453
1454 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1455 bnx2i_ep->ep_iscsi_cid);
1456
1457 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1458 * driver needs to explicitly replenish RQ index during setup.
1459 */
1460 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1461 bnx2i_put_rq_buf(bnx2i_conn, 0);
1462
1463 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1464 return ret_code;
1465}
1466
1467
1468/**
1469 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1470 * @cls_conn: pointer to iscsi cls conn
1471 *
1472 * Destroy an iSCSI connection instance and release memory resources held by
1473 * this connection
1474 */
1475static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1476{
1477 struct iscsi_conn *conn = cls_conn->dd_data;
1478 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1479 struct Scsi_Host *shost;
1480 struct bnx2i_hba *hba;
b5cf6b63
EW		 1481 struct bnx2i_work *work, *tmp;
1482 unsigned cpu = 0;
1483 struct bnx2i_percpu_s *p;
cf4e6363
MC		 1484
1485 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1486 hba = iscsi_host_priv(shost);
1487
1488 bnx2i_conn_free_login_resources(hba, bnx2i_conn);
b5cf6b63
EW		 1489
1490 if (atomic_read(&bnx2i_conn->work_cnt)) {
1491 for_each_online_cpu(cpu) {
1492 p = &per_cpu(bnx2i_percpu, cpu);
1493 spin_lock_bh(&p->p_work_lock);
1494 list_for_each_entry_safe(work, tmp,
1495 &p->work_list, list) {
1496 if (work->session == conn->session &&
1497 work->bnx2i_conn == bnx2i_conn) {
1498 list_del_init(&work->list);
1499 kfree(work);
1500 if (!atomic_dec_and_test(
1501 &bnx2i_conn->work_cnt))
1502 break;
1503 }
1504 }
1505 spin_unlock_bh(&p->p_work_lock);
1506 }
1507 }
1508
cf4e6363
MC		 1509 iscsi_conn_teardown(cls_conn);
1510}
1511
1512
1513/**
d8585bcd
MC		 1514 * bnx2i_ep_get_param - return iscsi ep parameter to caller
1515 * @ep: pointer to iscsi endpoint
cf4e6363
MC		 1516 * @param: parameter type identifier
1517 * @buf: buffer pointer
1518 *
d8585bcd 1519 * returns iSCSI ep parameters
cf4e6363 1520 */
d8585bcd
MC		 1521static int bnx2i_ep_get_param(struct iscsi_endpoint *ep,
1522 enum iscsi_param param, char *buf)
cf4e6363 1523{
d8585bcd
MC		 1524 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
1525 struct bnx2i_hba *hba = bnx2i_ep->hba;
1526 int len = -ENOTCONN;
cf4e6363 1527
d8585bcd
MC		 1528 if (!hba)
1529 return -ENOTCONN;
7a2962c7 1530
cf4e6363
MC		 1531 switch (param) {
1532 case ISCSI_PARAM_CONN_PORT:
d8585bcd
MC		 1533 mutex_lock(&hba->net_dev_lock);
1534 if (bnx2i_ep->cm_sk)
1535 len = sprintf(buf, "%hu\n", bnx2i_ep->cm_sk->dst_port);
1536 mutex_unlock(&hba->net_dev_lock);
cf4e6363
MC		 1537 break;
1538 case ISCSI_PARAM_CONN_ADDRESS:
d8585bcd
MC		 1539 mutex_lock(&hba->net_dev_lock);
1540 if (bnx2i_ep->cm_sk)
1541 len = sprintf(buf, "%pI4\n", &bnx2i_ep->cm_sk->dst_ip);
1542 mutex_unlock(&hba->net_dev_lock);
cf4e6363
MC		 1543 break;
1544 default:
d8585bcd 1545 return -ENOSYS;
cf4e6363 1546 }
d8585bcd 1547
cf4e6363
MC		 1548 return len;
1549}
1550
1551/**
1552 * bnx2i_host_get_param - returns host (adapter) related parameters
1553 * @shost: scsi host pointer
1554 * @param: parameter type identifier
1555 * @buf: buffer pointer
1556 */
1557static int bnx2i_host_get_param(struct Scsi_Host *shost,
1558 enum iscsi_host_param param, char *buf)
1559{
1560 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1561 int len = 0;
1562
1563 switch (param) {
1564 case ISCSI_HOST_PARAM_HWADDRESS:
1565 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1566 break;
1567 case ISCSI_HOST_PARAM_NETDEV_NAME:
1568 len = sprintf(buf, "%s\n", hba->netdev->name);
1569 break;
625986c2
MC		 1570 case ISCSI_HOST_PARAM_IPADDRESS: {
1571 struct list_head *active_list = &hba->ep_active_list;
1572
1573 read_lock_bh(&hba->ep_rdwr_lock);
1574 if (!list_empty(&hba->ep_active_list)) {
1575 struct bnx2i_endpoint *bnx2i_ep;
1576 struct cnic_sock *csk;
1577
1578 bnx2i_ep = list_first_entry(active_list,
1579 struct bnx2i_endpoint,
1580 link);
1581 csk = bnx2i_ep->cm_sk;
1582 if (test_bit(SK_F_IPV6, &csk->flags))
1583 len = sprintf(buf, "%pI6\n", csk->src_ip);
1584 else
1585 len = sprintf(buf, "%pI4\n", csk->src_ip);
1586 }
1587 read_unlock_bh(&hba->ep_rdwr_lock);
1588 break;
1589 }
cf4e6363
MC		 1590 default:
1591 return iscsi_host_get_param(shost, param, buf);
1592 }
1593 return len;
1594}
1595
1596/**
1597 * bnx2i_conn_start - completes iscsi connection migration to FFP
1598 * @cls_conn: pointer to iscsi cls conn
1599 *
1600 * last call in FFP migration to handover iscsi conn to the driver
1601 */
1602static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1603{
1604 struct iscsi_conn *conn = cls_conn->dd_data;
1605 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1606
1607 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1608 bnx2i_update_iscsi_conn(conn);
1609
1610 /*
1611 * this should normally not sleep for a long time so it should
1612 * not disrupt the caller.
1613 */
1614 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1615 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1616 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1617 add_timer(&bnx2i_conn->ep->ofld_timer);
1618 /* update iSCSI context for this conn, wait for CNIC to complete */
1619 wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1620 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1621
1622 if (signal_pending(current))
1623 flush_signals(current);
1624 del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1625
1626 iscsi_conn_start(cls_conn);
1627 return 0;
1628}
1629
1630
1631/**
1632 * bnx2i_conn_get_stats - returns iSCSI stats
1633 * @cls_conn: pointer to iscsi cls conn
1634 * @stats: pointer to iscsi statistic struct
1635 */
1636static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1637 struct iscsi_stats *stats)
1638{
1639 struct iscsi_conn *conn = cls_conn->dd_data;
1640
1641 stats->txdata_octets = conn->txdata_octets;
1642 stats->rxdata_octets = conn->rxdata_octets;
1643 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1644 stats->dataout_pdus = conn->dataout_pdus_cnt;
1645 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1646 stats->datain_pdus = conn->datain_pdus_cnt;
1647 stats->r2t_pdus = conn->r2t_pdus_cnt;
1648 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1649 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
cf4e6363
MC		 1650 stats->digest_err = 0;
1651 stats->timeout_err = 0;
915aafd8
MC		 1652 strcpy(stats->custom[0].desc, "eh_abort_cnt");
1653 stats->custom[0].value = conn->eh_abort_cnt;
1654 stats->custom_length = 1;
cf4e6363
MC		 1655}
1656
1657
1658/**
1659 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1660 * @dst_addr: target IP address
1661 *
1662 * check if route resolves to BNX2 device
1663 */
1664static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1665{
1666 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1667 struct bnx2i_hba *hba;
1668 struct cnic_dev *cnic = NULL;
1669
cf4e6363
MC		 1670 hba = get_adapter_list_head();
1671 if (hba && hba->cnic)
1672 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1673 if (!cnic) {
1674 printk(KERN_ALERT "bnx2i: no route,"
1675 "can't connect using cnic\n");
1676 goto no_nx2_route;
1677 }
1678 hba = bnx2i_find_hba_for_cnic(cnic);
1679 if (!hba)
1680 goto no_nx2_route;
1681
1682 if (bnx2i_adapter_ready(hba)) {
1683 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1684 goto no_nx2_route;
1685 }
1686 if (hba->netdev->mtu > hba->mtu_supported) {
1687 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1688 hba->netdev->name, hba->netdev->mtu);
1689 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1690 hba->mtu_supported);
1691 goto no_nx2_route;
1692 }
1693 return hba;
1694no_nx2_route:
1695 return NULL;
1696}
1697
1698
1699/**
1700 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1701 * @hba: pointer to adapter instance
3f79410c 1702 * @ep: endpoint (transport identifier) structure
cf4e6363
MC		 1703 *
1704 * destroys cm_sock structure and on chip iscsi context
1705 */
1706static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1707 struct bnx2i_endpoint *ep)
1708{
5bf3f39f 1709 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
cf4e6363
MC		 1710 hba->cnic->cm_destroy(ep->cm_sk);
1711
cf4e6363
MC		 1712 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1713 ep->state == EP_STATE_DISCONN_TIMEDOUT) {
5bf3f39f
EW		 1714 if (ep->conn && ep->conn->cls_conn &&
1715 ep->conn->cls_conn->dd_data) {
1716 struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1717
1718 /* Must suspend all rx queue activity for this ep */
1719 set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1720 }
1721 /* CONN_DISCONNECT timeout may or may not be an issue depending
1722 * on what transcribed in TCP layer, different targets behave
1723 * differently
1724 */
1725 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1726 "please submit GRC Dump, NW/PCIe trace, "
1727 "driver msgs to developers for analysis\n",
1728 hba->netdev->name);
cf4e6363
MC		 1729 }
1730
1731 ep->state = EP_STATE_CLEANUP_START;
1732 init_timer(&ep->ofld_timer);
e37d2c47 1733 ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
cf4e6363
MC		 1734 ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1735 ep->ofld_timer.data = (unsigned long) ep;
1736 add_timer(&ep->ofld_timer);
1737
1738 bnx2i_ep_destroy_list_add(hba, ep);
1739
1740 /* destroy iSCSI context, wait for it to complete */
bee34877
EW		 1741 if (bnx2i_send_conn_destroy(hba, ep))
1742 ep->state = EP_STATE_CLEANUP_CMPL;
1743
cf4e6363
MC		 1744 wait_event_interruptible(ep->ofld_wait,
1745 (ep->state != EP_STATE_CLEANUP_START));
1746
1747 if (signal_pending(current))
1748 flush_signals(current);
1749 del_timer_sync(&ep->ofld_timer);
1750
1751 bnx2i_ep_destroy_list_del(hba, ep);
1752
1753 if (ep->state != EP_STATE_CLEANUP_CMPL)
1754 /* should never happen */
1755 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1756
1757 return 0;
1758}
1759
1760
1761/**
1762 * bnx2i_ep_connect - establish TCP connection to target portal
1763 * @shost: scsi host
1764 * @dst_addr: target IP address
1765 * @non_blocking: blocking or non-blocking call
1766 *
1767 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1768 * with l5_core and the CNIC. This is a multi-step process of resolving
1769 * route to target, create a iscsi connection context, handshaking with
1770 * CNIC module to create/initialize the socket struct and finally
1771 * sending down option-2 request to complete TCP 3-way handshake
1772 */
1773static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1774 struct sockaddr *dst_addr,
1775 int non_blocking)
1776{
1777 u32 iscsi_cid = BNX2I_CID_RESERVED;
1778 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1779 struct sockaddr_in6 *desti6;
1780 struct bnx2i_endpoint *bnx2i_ep;
1781 struct bnx2i_hba *hba;
1782 struct cnic_dev *cnic;
1783 struct cnic_sockaddr saddr;
1784 struct iscsi_endpoint *ep;
1785 int rc = 0;
1786
fac3cc45 1787 if (shost) {
cf4e6363
MC		 1788 /* driver is given scsi host to work with */
1789 hba = iscsi_host_priv(shost);
fac3cc45 1790 } else
cf4e6363
MC		 1791 /*
1792 * check if the given destination can be reached through
1793 * a iscsi capable NetXtreme2 device
1794 */
1795 hba = bnx2i_check_route(dst_addr);
fac3cc45 1796
a91031a6 1797 if (!hba) {
490475a9 1798 rc = -EINVAL;
55e15c97 1799 goto nohba;
cf4e6363 1800 }
a91031a6 1801 mutex_lock(&hba->net_dev_lock);
cf4e6363 1802
a91031a6
EW		 1803 if (bnx2i_adapter_ready(hba) || !hba->cid_que.cid_free_cnt) {
1804 rc = -EPERM;
1805 goto check_busy;
1806 }
cf4e6363
MC		 1807 cnic = hba->cnic;
1808 ep = bnx2i_alloc_ep(hba);
1809 if (!ep) {
1810 rc = -ENOMEM;
1811 goto check_busy;
1812 }
1813 bnx2i_ep = ep->dd_data;
1814
b5cf6b63 1815 atomic_set(&bnx2i_ep->num_active_cmds, 0);
cf4e6363
MC		 1816 iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1817 if (iscsi_cid == -1) {
a91031a6
EW		 1818 printk(KERN_ALERT "bnx2i (%s): alloc_ep - unable to allocate "
1819 "iscsi cid\n", hba->netdev->name);
cf4e6363 1820 rc = -ENOMEM;
a91031a6
EW		 1821 bnx2i_free_ep(ep);
1822 goto check_busy;
cf4e6363
MC		 1823 }
1824 bnx2i_ep->hba_age = hba->age;
1825
1826 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1827 if (rc != 0) {
a91031a6
EW		 1828 printk(KERN_ALERT "bnx2i (%s): ep_conn - alloc QP resc error"
1829 "\n", hba->netdev->name);
cf4e6363
MC		 1830 rc = -ENOMEM;
1831 goto qp_resc_err;
1832 }
1833
1834 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1835 bnx2i_ep->state = EP_STATE_OFLD_START;
1836 bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1837
1838 init_timer(&bnx2i_ep->ofld_timer);
1839 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1840 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1841 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1842 add_timer(&bnx2i_ep->ofld_timer);
1843
bee34877
EW		 1844 if (bnx2i_send_conn_ofld_req(hba, bnx2i_ep)) {
1845 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1846 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1847 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1848 rc = -EBUSY;
1849 } else
1850 rc = -ENOSPC;
1851 printk(KERN_ALERT "bnx2i (%s): unable to send conn offld kwqe"
1852 "\n", hba->netdev->name);
1853 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1854 goto conn_failed;
1855 }
cf4e6363
MC		 1856
1857 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1858 wait_event_interruptible(bnx2i_ep->ofld_wait,
1859 bnx2i_ep->state != EP_STATE_OFLD_START);
1860
1861 if (signal_pending(current))
1862 flush_signals(current);
1863 del_timer_sync(&bnx2i_ep->ofld_timer);
1864
1865 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1866
1867 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
a91031a6
EW		 1868 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED_CID_BUSY) {
1869 printk(KERN_ALERT "bnx2i (%s): iscsi cid %d is busy\n",
1870 hba->netdev->name, bnx2i_ep->ep_iscsi_cid);
1871 rc = -EBUSY;
1872 } else
1873 rc = -ENOSPC;
cf4e6363
MC		 1874 goto conn_failed;
1875 }
1876
1877 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1878 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1879 if (rc) {
1880 rc = -EINVAL;
a91031a6
EW		 1881 /* Need to terminate and cleanup the connection */
1882 goto release_ep;
cf4e6363
MC		 1883 }
1884
1885 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1886 bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1887 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1888
1889 memset(&saddr, 0, sizeof(saddr));
1890 if (dst_addr->sa_family == AF_INET) {
1891 desti = (struct sockaddr_in *) dst_addr;
1892 saddr.remote.v4 = *desti;
1893 saddr.local.v4.sin_family = desti->sin_family;
1894 } else if (dst_addr->sa_family == AF_INET6) {
1895 desti6 = (struct sockaddr_in6 *) dst_addr;
1896 saddr.remote.v6 = *desti6;
1897 saddr.local.v6.sin6_family = desti6->sin6_family;
1898 }
1899
1900 bnx2i_ep->timestamp = jiffies;
1901 bnx2i_ep->state = EP_STATE_CONNECT_START;
1902 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1903 rc = -EINVAL;
1904 goto conn_failed;
1905 } else
1906 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
cf4e6363
MC		 1907 if (rc)
1908 goto release_ep;
1909
46012e8b
EW		 1910 bnx2i_ep_active_list_add(hba, bnx2i_ep);
1911
cf4e6363 1912 if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
46012e8b
EW		 1913 goto del_active_ep;
1914
cf4e6363
MC		 1915 mutex_unlock(&hba->net_dev_lock);
1916 return ep;
1917
46012e8b
EW		 1918del_active_ep:
1919 bnx2i_ep_active_list_del(hba, bnx2i_ep);
cf4e6363
MC		 1920release_ep:
1921 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1922 mutex_unlock(&hba->net_dev_lock);
1923 return ERR_PTR(rc);
1924 }
1925conn_failed:
cf4e6363
MC		 1926 bnx2i_free_qp_resc(hba, bnx2i_ep);
1927qp_resc_err:
1928 bnx2i_free_ep(ep);
cf4e6363 1929check_busy:
55e15c97
EW		 1930 mutex_unlock(&hba->net_dev_lock);
1931nohba:
cf4e6363
MC		 1932 return ERR_PTR(rc);
1933}
1934
1935
1936/**
1937 * bnx2i_ep_poll - polls for TCP connection establishement
1938 * @ep: TCP connection (endpoint) handle
1939 * @timeout_ms: timeout value in milli secs
1940 *
1941 * polls for TCP connect request to complete
1942 */
1943static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1944{
1945 struct bnx2i_endpoint *bnx2i_ep;
1946 int rc = 0;
1947
1948 bnx2i_ep = ep->dd_data;
1949 if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1950 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1951 (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1952 return -1;
1953 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1954 return 1;
1955
1956 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1957 ((bnx2i_ep->state ==
1958 EP_STATE_OFLD_FAILED) ||
1959 (bnx2i_ep->state ==
1960 EP_STATE_CONNECT_FAILED) ||
1961 (bnx2i_ep->state ==
1962 EP_STATE_CONNECT_COMPL)),
1963 msecs_to_jiffies(timeout_ms));
490475a9 1964 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
cf4e6363
MC		 1965 rc = -1;
1966
1967 if (rc > 0)
1968 return 1;
1969 else if (!rc)
1970 return 0; /* timeout */
1971 else
1972 return rc;
1973}
1974
1975
1976/**
1977 * bnx2i_ep_tcp_conn_active - check EP state transition
1978 * @ep: endpoint pointer
1979 *
1980 * check if underlying TCP connection is active
1981 */
1982static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1983{
1984 int ret;
1985 int cnic_dev_10g = 0;
1986
1987 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1988 cnic_dev_10g = 1;
1989
1990 switch (bnx2i_ep->state) {
cf4e6363
MC		 1991 case EP_STATE_CLEANUP_FAILED:
1992 case EP_STATE_OFLD_FAILED:
1993 case EP_STATE_DISCONN_TIMEDOUT:
1994 ret = 0;
1995 break;
252e4480 1996 case EP_STATE_CONNECT_START:
ec8933b4 1997 case EP_STATE_CONNECT_FAILED:
cf4e6363
MC		 1998 case EP_STATE_CONNECT_COMPL:
1999 case EP_STATE_ULP_UPDATE_START:
2000 case EP_STATE_ULP_UPDATE_COMPL:
2001 case EP_STATE_TCP_FIN_RCVD:
2eefb20d
EW		 2002 case EP_STATE_LOGOUT_SENT:
2003 case EP_STATE_LOGOUT_RESP_RCVD:
cf4e6363
MC		 2004 case EP_STATE_ULP_UPDATE_FAILED:
2005 ret = 1;
2006 break;
2007 case EP_STATE_TCP_RST_RCVD:
cf4e6363 2008 if (cnic_dev_10g)
cf4e6363 2009 ret = 0;
94810e82
EW		 2010 else
2011 ret = 1;
cf4e6363
MC		 2012 break;
2013 default:
2014 ret = 0;
2015 }
2016
2017 return ret;
2018}
2019
2020
6447f286
EW		 2021/*
2022 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
2023 * @ep: TCP connection (bnx2i endpoint) handle
cf4e6363
MC		 2024 *
2025 * executes TCP connection teardown process
2026 */
6447f286 2027int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
cf4e6363 2028{
6447f286 2029 struct bnx2i_hba *hba = bnx2i_ep->hba;
cf4e6363 2030 struct cnic_dev *cnic;
6447f286
EW		 2031 struct iscsi_session *session = NULL;
2032 struct iscsi_conn *conn = NULL;
2033 int ret = 0;
2eefb20d
EW		 2034 int close = 0;
2035 int close_ret = 0;
cf4e6363 2036
6447f286
EW		 2037 if (!hba)
2038 return 0;
cf4e6363 2039
6447f286
EW		 2040 cnic = hba->cnic;
2041 if (!cnic)
2042 return 0;
2043
a91031a6
EW		 2044 if (bnx2i_ep->state == EP_STATE_IDLE ||
2045 bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
250ae982
EW		 2046 return 0;
2047
6447f286
EW		 2048 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
2049 goto destroy_conn;
cf4e6363
MC		 2050
2051 if (bnx2i_ep->conn) {
6447f286 2052 conn = bnx2i_ep->conn->cls_conn->dd_data;
cf4e6363 2053 session = conn->session;
cf4e6363
MC		 2054 }
2055
cf4e6363 2056 init_timer(&bnx2i_ep->ofld_timer);
e37d2c47 2057 bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
cf4e6363
MC		 2058 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
2059 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
2060 add_timer(&bnx2i_ep->ofld_timer);
2061
2eefb20d 2062 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
6447f286 2063 goto out;
cf4e6363 2064
2eefb20d 2065 if (session) {
659743b0 2066 spin_lock_bh(&session->frwd_lock);
2eefb20d
EW		 2067 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
2068 if (session->state == ISCSI_STATE_LOGGING_OUT) {
2069 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
2070 /* Logout sent, but no resp */
a91031a6
EW		 2071 printk(KERN_ALERT "bnx2i (%s): WARNING"
2072 " logout response was not "
2073 "received!\n",
2074 bnx2i_ep->hba->netdev->name);
2eefb20d
EW		 2075 } else if (bnx2i_ep->state ==
2076 EP_STATE_LOGOUT_RESP_RCVD)
2077 close = 1;
2078 }
2079 } else
2080 close = 1;
2081
659743b0 2082 spin_unlock_bh(&session->frwd_lock);
2eefb20d
EW		 2083 }
2084
2085 bnx2i_ep->state = EP_STATE_DISCONN_START;
2086
2087 if (close)
2088 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2089 else
2090 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2091
2092 if (close_ret)
a91031a6 2093 printk(KERN_ALERT "bnx2i (%s): close/abort(%d) returned %d\n",
2c2255e0
EW		 2094 bnx2i_ep->hba->netdev->name, close, close_ret);
2095 else
2096 /* wait for option-2 conn teardown */
2097 wait_event_interruptible(bnx2i_ep->ofld_wait,
5fc956c2
TP		 2098 ((bnx2i_ep->state != EP_STATE_DISCONN_START)
2099 && (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD)));
cf4e6363
MC		 2100
2101 if (signal_pending(current))
2102 flush_signals(current);
2103 del_timer_sync(&bnx2i_ep->ofld_timer);
2104
6447f286 2105destroy_conn:
46012e8b 2106 bnx2i_ep_active_list_del(hba, bnx2i_ep);
6447f286 2107 if (bnx2i_tear_down_conn(hba, bnx2i_ep))
a91031a6 2108 return -EINVAL;
6447f286
EW		 2109out:
2110 bnx2i_ep->state = EP_STATE_IDLE;
2111 return ret;
2112}
2113
2114
2115/**
2116 * bnx2i_ep_disconnect - executes TCP connection teardown process
2117 * @ep: TCP connection (iscsi endpoint) handle
2118 *
2119 * executes TCP connection teardown process
2120 */
2121static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2122{
2123 struct bnx2i_endpoint *bnx2i_ep;
2124 struct bnx2i_conn *bnx2i_conn = NULL;
2125 struct iscsi_conn *conn = NULL;
2126 struct bnx2i_hba *hba;
2127
2128 bnx2i_ep = ep->dd_data;
2129
2130 /* driver should not attempt connection cleanup until TCP_CONNECT
2131 * completes either successfully or fails. Timeout is 9-secs, so
2132 * wait for it to complete
2133 */
2134 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2135 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2136 msleep(250);
2137
2138 if (bnx2i_ep->conn) {
2139 bnx2i_conn = bnx2i_ep->conn;
2140 conn = bnx2i_conn->cls_conn->dd_data;
2141 iscsi_suspend_queue(conn);
2142 }
2143 hba = bnx2i_ep->hba;
2144
2145 mutex_lock(&hba->net_dev_lock);
2146
a91031a6
EW		 2147 if (bnx2i_ep->state == EP_STATE_DISCONN_TIMEDOUT)
2148 goto out;
6447f286 2149
a91031a6 2150 if (bnx2i_ep->state == EP_STATE_IDLE)
6447f286
EW		 2151 goto free_resc;
2152
a91031a6
EW		 2153 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
2154 (bnx2i_ep->hba_age != hba->age)) {
2155 bnx2i_ep_active_list_del(hba, bnx2i_ep);
6447f286 2156 goto free_resc;
a91031a6 2157 }
6447f286
EW		 2158
2159 /* Do all chip cleanup here */
2160 if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
cf4e6363
MC		 2161 mutex_unlock(&hba->net_dev_lock);
2162 return;
2163 }
2164free_resc:
cf4e6363 2165 bnx2i_free_qp_resc(hba, bnx2i_ep);
a91031a6 2166
cf4e6363
MC		 2167 if (bnx2i_conn)
2168 bnx2i_conn->ep = NULL;
2169
2170 bnx2i_free_ep(ep);
a91031a6 2171out:
6447f286 2172 mutex_unlock(&hba->net_dev_lock);
490475a9
AV		 2173
2174 wake_up_interruptible(&hba->eh_wait);
cf4e6363
MC		 2175}
2176
2177
2178/**
2179 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2180 * @buf: pointer to buffer containing iscsi path message
2181 *
2182 */
2183static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2184{
2185 struct bnx2i_hba *hba = iscsi_host_priv(shost);
2186 char *buf = (char *) params;
2187 u16 len = sizeof(*params);
2188
2189 /* handled by cnic driver */
2190 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2191 len);
2192
2193 return 0;
2194}
2195
587a1f16 2196static umode_t bnx2i_attr_is_visible(int param_type, int param)
3128c6c7
MC		 2197{
2198 switch (param_type) {
f27fb2ef
MC		 2199 case ISCSI_HOST_PARAM:
2200 switch (param) {
2201 case ISCSI_HOST_PARAM_NETDEV_NAME:
2202 case ISCSI_HOST_PARAM_HWADDRESS:
2203 case ISCSI_HOST_PARAM_IPADDRESS:
2204 return S_IRUGO;
2205 default:
2206 return 0;
2207 }
3128c6c7
MC		 2208 case ISCSI_PARAM:
2209 switch (param) {
2210 case ISCSI_PARAM_MAX_RECV_DLENGTH:
2211 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
2212 case ISCSI_PARAM_HDRDGST_EN:
2213 case ISCSI_PARAM_DATADGST_EN:
2214 case ISCSI_PARAM_CONN_ADDRESS:
2215 case ISCSI_PARAM_CONN_PORT:
2216 case ISCSI_PARAM_EXP_STATSN:
2217 case ISCSI_PARAM_PERSISTENT_ADDRESS:
2218 case ISCSI_PARAM_PERSISTENT_PORT:
2219 case ISCSI_PARAM_PING_TMO:
2220 case ISCSI_PARAM_RECV_TMO:
1d063c17
MC		 2221 case ISCSI_PARAM_INITIAL_R2T_EN:
2222 case ISCSI_PARAM_MAX_R2T:
2223 case ISCSI_PARAM_IMM_DATA_EN:
2224 case ISCSI_PARAM_FIRST_BURST:
2225 case ISCSI_PARAM_MAX_BURST:
2226 case ISCSI_PARAM_PDU_INORDER_EN:
2227 case ISCSI_PARAM_DATASEQ_INORDER_EN:
2228 case ISCSI_PARAM_ERL:
2229 case ISCSI_PARAM_TARGET_NAME:
2230 case ISCSI_PARAM_TPGT:
2231 case ISCSI_PARAM_USERNAME:
2232 case ISCSI_PARAM_PASSWORD:
2233 case ISCSI_PARAM_USERNAME_IN:
2234 case ISCSI_PARAM_PASSWORD_IN:
2235 case ISCSI_PARAM_FAST_ABORT:
2236 case ISCSI_PARAM_ABORT_TMO:
2237 case ISCSI_PARAM_LU_RESET_TMO:
2238 case ISCSI_PARAM_TGT_RESET_TMO:
2239 case ISCSI_PARAM_IFACE_NAME:
2240 case ISCSI_PARAM_INITIATOR_NAME:
7c160fac
TP		 2241 case ISCSI_PARAM_BOOT_ROOT:
2242 case ISCSI_PARAM_BOOT_NIC:
2243 case ISCSI_PARAM_BOOT_TARGET:
3128c6c7
MC		 2244 return S_IRUGO;
2245 default:
2246 return 0;
2247 }
2248 }
2249
2250 return 0;
2251}
cf4e6363
MC		 2252
2253/*
2254 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2255 * used while registering with the scsi host and iSCSI transport module.
2256 */
2257static struct scsi_host_template bnx2i_host_template = {
2258 .module = THIS_MODULE,
f39a7757 2259 .name = "QLogic Offload iSCSI Initiator",
cf4e6363
MC		 2260 .proc_name = "bnx2i",
2261 .queuecommand = iscsi_queuecommand,
b6a05c82 2262 .eh_timed_out = iscsi_eh_cmd_timed_out,
cf4e6363
MC		 2263 .eh_abort_handler = iscsi_eh_abort,
2264 .eh_device_reset_handler = iscsi_eh_device_reset,
309ce156 2265 .eh_target_reset_handler = iscsi_eh_recover_target,
db5ed4df 2266 .change_queue_depth = scsi_change_queue_depth,
6f9c04ff 2267 .target_alloc = iscsi_target_alloc,
b5cf6b63 2268 .can_queue = 2048,
cf4e6363 2269 .max_sectors = 127,
b5cf6b63 2270 .cmd_per_lun = 128,
cf4e6363
MC		 2271 .this_id = -1,
2272 .use_clustering = ENABLE_CLUSTERING,
2273 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
2274 .shost_attrs = bnx2i_dev_attributes,
c40ecc12 2275 .track_queue_depth = 1,
cf4e6363
MC		 2276};
2277
2278struct iscsi_transport bnx2i_iscsi_transport = {
2279 .owner = THIS_MODULE,
2280 .name = "bnx2i",
2281 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST |
2282 CAP_MULTI_R2T | CAP_DATADGST |
09813ba5
EW		 2283 CAP_DATA_PATH_OFFLOAD |
2284 CAP_TEXT_NEGO,
cf4e6363
MC		 2285 .create_session = bnx2i_session_create,
2286 .destroy_session = bnx2i_session_destroy,
2287 .create_conn = bnx2i_conn_create,
2288 .bind_conn = bnx2i_conn_bind,
2289 .destroy_conn = bnx2i_conn_destroy,
3128c6c7 2290 .attr_is_visible = bnx2i_attr_is_visible,
cf4e6363 2291 .set_param = iscsi_set_param,
d8585bcd 2292 .get_conn_param = iscsi_conn_get_param,
cf4e6363
MC		 2293 .get_session_param = iscsi_session_get_param,
2294 .get_host_param = bnx2i_host_get_param,
2295 .start_conn = bnx2i_conn_start,
2296 .stop_conn = iscsi_conn_stop,
2297 .send_pdu = iscsi_conn_send_pdu,
2298 .xmit_task = bnx2i_task_xmit,
2299 .get_stats = bnx2i_conn_get_stats,
2300 /* TCP connect - disconnect - option-2 interface calls */
d8585bcd 2301 .get_ep_param = bnx2i_ep_get_param,
cf4e6363
MC		 2302 .ep_connect = bnx2i_ep_connect,
2303 .ep_poll = bnx2i_ep_poll,
2304 .ep_disconnect = bnx2i_ep_disconnect,
2305 .set_path = bnx2i_nl_set_path,
2306 /* Error recovery timeout call */
2307 .session_recovery_timedout = iscsi_session_recovery_timedout,
2308 .cleanup_task = bnx2i_cleanup_task,
2309};
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