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[SCSI] bnx2i: Modified the bnx2i stop path to compensate for in progress ops
[deliverable/linux.git] / drivers / scsi / bnx2i / bnx2i_iscsi.c
CommitLineData
cf4e6363
MC		 1/*
2 * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
3 *
4 * Copyright (c) 2006 - 2009 Broadcom Corporation
5 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
6 * Copyright (c) 2007, 2008 Mike Christie
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation.
11 *
12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
13 */
14
5a0e3ad6 15#include <linux/slab.h>
cf4e6363
MC		 16#include <scsi/scsi_tcq.h>
17#include <scsi/libiscsi.h>
18#include "bnx2i.h"
19
20struct scsi_transport_template *bnx2i_scsi_xport_template;
21struct iscsi_transport bnx2i_iscsi_transport;
22static struct scsi_host_template bnx2i_host_template;
23
24/*
25 * Global endpoint resource info
26 */
27static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */
28
29
30static int bnx2i_adapter_ready(struct bnx2i_hba *hba)
31{
32 int retval = 0;
33
34 if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) ||
35 test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
36 test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
37 retval = -EPERM;
38 return retval;
39}
40
41/**
42 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
43 * @cmd: iscsi cmd struct pointer
44 * @buf_off: absolute buffer offset
45 * @start_bd_off: u32 pointer to return the offset within the BD
46 * indicated by 'start_bd_idx' on which 'buf_off' falls
47 * @start_bd_idx: index of the BD on which 'buf_off' falls
48 *
49 * identifies & marks various bd info for scsi command's imm data,
50 * unsolicited data and the first solicited data seq.
51 */
52static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off,
53 u32 *start_bd_off, u32 *start_bd_idx)
54{
55 struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl;
56 u32 cur_offset = 0;
57 u32 cur_bd_idx = 0;
58
59 if (buf_off) {
60 while (buf_off >= (cur_offset + bd_tbl->buffer_length)) {
61 cur_offset += bd_tbl->buffer_length;
62 cur_bd_idx++;
63 bd_tbl++;
64 }
65 }
66
67 *start_bd_off = buf_off - cur_offset;
68 *start_bd_idx = cur_bd_idx;
69}
70
71/**
72 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
73 * @task: transport layer's cmd struct pointer
74 *
75 * identifies & marks various bd info for scsi command's immediate data,
76 * unsolicited data and first solicited data seq which includes BD start
77 * index & BD buf off. his function takes into account iscsi parameter such
78 * as immediate data and unsolicited data is support on this connection.
79 */
80static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task)
81{
82 struct bnx2i_cmd *cmd = task->dd_data;
83 u32 start_bd_offset;
84 u32 start_bd_idx;
85 u32 buffer_offset = 0;
86 u32 cmd_len = cmd->req.total_data_transfer_length;
87
88 /* if ImmediateData is turned off & IntialR2T is turned on,
89 * there will be no immediate or unsolicited data, just return.
90 */
91 if (!iscsi_task_has_unsol_data(task) && !task->imm_count)
92 return;
93
94 /* Immediate data */
95 buffer_offset += task->imm_count;
96 if (task->imm_count == cmd_len)
97 return;
98
99 if (iscsi_task_has_unsol_data(task)) {
100 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
101 &start_bd_offset, &start_bd_idx);
102 cmd->req.ud_buffer_offset = start_bd_offset;
103 cmd->req.ud_start_bd_index = start_bd_idx;
104 buffer_offset += task->unsol_r2t.data_length;
105 }
106
107 if (buffer_offset != cmd_len) {
108 bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset,
109 &start_bd_offset, &start_bd_idx);
110 if ((start_bd_offset > task->conn->session->first_burst) ||
111 (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) {
112 int i = 0;
113
114 iscsi_conn_printk(KERN_ALERT, task->conn,
115 "bnx2i- error, buf offset 0x%x "
116 "bd_valid %d use_sg %d\n",
117 buffer_offset, cmd->io_tbl.bd_valid,
118 scsi_sg_count(cmd->scsi_cmd));
119 for (i = 0; i < cmd->io_tbl.bd_valid; i++)
120 iscsi_conn_printk(KERN_ALERT, task->conn,
121 "bnx2i err, bd[%d]: len %x\n",
122 i, cmd->io_tbl.bd_tbl[i].\
123 buffer_length);
124 }
125 cmd->req.sd_buffer_offset = start_bd_offset;
126 cmd->req.sd_start_bd_index = start_bd_idx;
127 }
128}
129
130
131
132/**
133 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
134 * @hba: adapter instance
135 * @cmd: iscsi cmd struct pointer
136 *
137 * map SG list
138 */
139static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd)
140{
141 struct scsi_cmnd *sc = cmd->scsi_cmd;
142 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
143 struct scatterlist *sg;
144 int byte_count = 0;
145 int bd_count = 0;
146 int sg_count;
147 int sg_len;
148 u64 addr;
149 int i;
150
151 BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD);
152
153 sg_count = scsi_dma_map(sc);
154
155 scsi_for_each_sg(sc, sg, sg_count, i) {
156 sg_len = sg_dma_len(sg);
157 addr = (u64) sg_dma_address(sg);
158 bd[bd_count].buffer_addr_lo = addr & 0xffffffff;
159 bd[bd_count].buffer_addr_hi = addr >> 32;
160 bd[bd_count].buffer_length = sg_len;
161 bd[bd_count].flags = 0;
162 if (bd_count == 0)
163 bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN;
164
165 byte_count += sg_len;
166 bd_count++;
167 }
168
169 if (bd_count)
170 bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN;
171
172 BUG_ON(byte_count != scsi_bufflen(sc));
173 return bd_count;
174}
175
176/**
177 * bnx2i_iscsi_map_sg_list - maps SG list
178 * @cmd: iscsi cmd struct pointer
179 *
180 * creates BD list table for the command
181 */
182static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd)
183{
184 int bd_count;
185
186 bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd);
187 if (!bd_count) {
188 struct iscsi_bd *bd = cmd->io_tbl.bd_tbl;
189
190 bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0;
191 bd[0].buffer_length = bd[0].flags = 0;
192 }
193 cmd->io_tbl.bd_valid = bd_count;
194}
195
196
197/**
198 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
199 * @cmd: iscsi cmd struct pointer
200 *
201 * unmap IO buffers and invalidate the BD table
202 */
203void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd)
204{
205 struct scsi_cmnd *sc = cmd->scsi_cmd;
206
207 if (cmd->io_tbl.bd_valid && sc) {
208 scsi_dma_unmap(sc);
209 cmd->io_tbl.bd_valid = 0;
210 }
211}
212
213static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd)
214{
215 memset(&cmd->req, 0x00, sizeof(cmd->req));
216 cmd->req.op_code = 0xFF;
217 cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma;
218 cmd->req.bd_list_addr_hi =
219 (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32);
220
221}
222
223
224/**
225 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
226 * @hba: pointer to adapter instance
227 * @conn: pointer to iscsi connection
228 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
229 *
230 * update iscsi cid table entry with connection pointer. This enables
231 * driver to quickly get hold of connection structure pointer in
232 * completion/interrupt thread using iscsi context ID
233 */
234static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
235 struct bnx2i_conn *bnx2i_conn,
236 u32 iscsi_cid)
237{
238 if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
239 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
240 "conn bind - entry #%d not free\n", iscsi_cid);
241 return -EBUSY;
242 }
243
244 hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn;
245 return 0;
246}
247
248
249/**
250 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
251 * @hba: pointer to adapter instance
252 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
253 */
254struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
255 u16 iscsi_cid)
256{
257 if (!hba->cid_que.conn_cid_tbl) {
258 printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n");
259 return NULL;
260
261 } else if (iscsi_cid >= hba->max_active_conns) {
262 printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid);
263 return NULL;
264 }
265 return hba->cid_que.conn_cid_tbl[iscsi_cid];
266}
267
268
269/**
270 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
271 * @hba: pointer to adapter instance
272 */
273static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba)
274{
275 int idx;
276
277 if (!hba->cid_que.cid_free_cnt)
278 return -1;
279
280 idx = hba->cid_que.cid_q_cons_idx;
281 hba->cid_que.cid_q_cons_idx++;
282 if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx)
283 hba->cid_que.cid_q_cons_idx = 0;
284
285 hba->cid_que.cid_free_cnt--;
286 return hba->cid_que.cid_que[idx];
287}
288
289
290/**
291 * bnx2i_free_iscsi_cid - returns tcp port to free list
292 * @hba: pointer to adapter instance
293 * @iscsi_cid: iscsi context ID to free
294 */
295static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid)
296{
297 int idx;
298
299 if (iscsi_cid == (u16) -1)
300 return;
301
302 hba->cid_que.cid_free_cnt++;
303
304 idx = hba->cid_que.cid_q_prod_idx;
305 hba->cid_que.cid_que[idx] = iscsi_cid;
306 hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL;
307 hba->cid_que.cid_q_prod_idx++;
308 if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx)
309 hba->cid_que.cid_q_prod_idx = 0;
310}
311
312
313/**
314 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
315 * @hba: pointer to adapter instance
316 *
317 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
318 * and initialize table attributes
319 */
320static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba)
321{
322 int mem_size;
323 int i;
324
325 mem_size = hba->max_active_conns * sizeof(u32);
326 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
327
328 hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL);
329 if (!hba->cid_que.cid_que_base)
330 return -ENOMEM;
331
332 mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *);
333 mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK;
334 hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL);
335 if (!hba->cid_que.conn_cid_tbl) {
336 kfree(hba->cid_que.cid_que_base);
337 hba->cid_que.cid_que_base = NULL;
338 return -ENOMEM;
339 }
340
341 hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base;
342 hba->cid_que.cid_q_prod_idx = 0;
343 hba->cid_que.cid_q_cons_idx = 0;
344 hba->cid_que.cid_q_max_idx = hba->max_active_conns;
345 hba->cid_que.cid_free_cnt = hba->max_active_conns;
346
347 for (i = 0; i < hba->max_active_conns; i++) {
348 hba->cid_que.cid_que[i] = i;
349 hba->cid_que.conn_cid_tbl[i] = NULL;
350 }
351 return 0;
352}
353
354
355/**
356 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
357 * @hba: pointer to adapter instance
358 */
359static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba)
360{
361 kfree(hba->cid_que.cid_que_base);
362 hba->cid_que.cid_que_base = NULL;
363
364 kfree(hba->cid_que.conn_cid_tbl);
365 hba->cid_que.conn_cid_tbl = NULL;
366}
367
368
369/**
370 * bnx2i_alloc_ep - allocates ep structure from global pool
371 * @hba: pointer to adapter instance
372 *
373 * routine allocates a free endpoint structure from global pool and
374 * a tcp port to be used for this connection. Global resource lock,
375 * 'bnx2i_resc_lock' is held while accessing shared global data structures
376 */
377static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
378{
379 struct iscsi_endpoint *ep;
380 struct bnx2i_endpoint *bnx2i_ep;
381
382 ep = iscsi_create_endpoint(sizeof(*bnx2i_ep));
383 if (!ep) {
384 printk(KERN_ERR "bnx2i: Could not allocate ep\n");
385 return NULL;
386 }
387
388 bnx2i_ep = ep->dd_data;
46012e8b 389 bnx2i_ep->cls_ep = ep;
cf4e6363
MC		 390 INIT_LIST_HEAD(&bnx2i_ep->link);
391 bnx2i_ep->state = EP_STATE_IDLE;
c19dcd01 392 bnx2i_ep->ep_iscsi_cid = (u16) -1;
cf4e6363
MC		 393 bnx2i_ep->hba = hba;
394 bnx2i_ep->hba_age = hba->age;
395 hba->ofld_conns_active++;
396 init_waitqueue_head(&bnx2i_ep->ofld_wait);
397 return ep;
398}
399
400
401/**
402 * bnx2i_free_ep - free endpoint
403 * @ep: pointer to iscsi endpoint structure
404 */
405static void bnx2i_free_ep(struct iscsi_endpoint *ep)
406{
407 struct bnx2i_endpoint *bnx2i_ep = ep->dd_data;
408 unsigned long flags;
409
410 spin_lock_irqsave(&bnx2i_resc_lock, flags);
411 bnx2i_ep->state = EP_STATE_IDLE;
412 bnx2i_ep->hba->ofld_conns_active--;
413
414 bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid);
415 if (bnx2i_ep->conn) {
416 bnx2i_ep->conn->ep = NULL;
417 bnx2i_ep->conn = NULL;
418 }
419
420 bnx2i_ep->hba = NULL;
421 spin_unlock_irqrestore(&bnx2i_resc_lock, flags);
422 iscsi_destroy_endpoint(ep);
423}
424
425
426/**
427 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
428 * @hba: adapter instance pointer
429 * @session: iscsi session pointer
430 * @cmd: iscsi command structure
431 */
432static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session,
433 struct bnx2i_cmd *cmd)
434{
435 struct io_bdt *io = &cmd->io_tbl;
436 struct iscsi_bd *bd;
437
438 io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev,
439 ISCSI_MAX_BDS_PER_CMD * sizeof(*bd),
440 &io->bd_tbl_dma, GFP_KERNEL);
441 if (!io->bd_tbl) {
442 iscsi_session_printk(KERN_ERR, session, "Could not "
443 "allocate bdt.\n");
444 return -ENOMEM;
445 }
446 io->bd_valid = 0;
447 return 0;
448}
449
450/**
451 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
452 * @hba: adapter instance pointer
453 * @session: iscsi session pointer
454 * @cmd: iscsi command structure
455 */
456static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba,
457 struct iscsi_session *session)
458{
459 int i;
460
461 for (i = 0; i < session->cmds_max; i++) {
462 struct iscsi_task *task = session->cmds[i];
463 struct bnx2i_cmd *cmd = task->dd_data;
464
465 if (cmd->io_tbl.bd_tbl)
466 dma_free_coherent(&hba->pcidev->dev,
467 ISCSI_MAX_BDS_PER_CMD *
468 sizeof(struct iscsi_bd),
469 cmd->io_tbl.bd_tbl,
470 cmd->io_tbl.bd_tbl_dma);
471 }
472
473}
474
475
476/**
477 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
478 * @hba: adapter instance pointer
479 * @session: iscsi session pointer
480 */
481static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba,
482 struct iscsi_session *session)
483{
484 int i;
485
486 for (i = 0; i < session->cmds_max; i++) {
487 struct iscsi_task *task = session->cmds[i];
488 struct bnx2i_cmd *cmd = task->dd_data;
489
cf4e6363
MC		 490 task->hdr = &cmd->hdr;
491 task->hdr_max = sizeof(struct iscsi_hdr);
492
493 if (bnx2i_alloc_bdt(hba, session, cmd))
494 goto free_bdts;
495 }
496
497 return 0;
498
499free_bdts:
500 bnx2i_destroy_cmd_pool(hba, session);
501 return -ENOMEM;
502}
503
504
505/**
506 * bnx2i_setup_mp_bdt - allocate BD table resources
507 * @hba: pointer to adapter structure
508 *
509 * Allocate memory for dummy buffer and associated BD
510 * table to be used by middle path (MP) requests
511 */
512static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba)
513{
514 int rc = 0;
515 struct iscsi_bd *mp_bdt;
516 u64 addr;
517
518 hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
519 &hba->mp_bd_dma, GFP_KERNEL);
520 if (!hba->mp_bd_tbl) {
521 printk(KERN_ERR "unable to allocate Middle Path BDT\n");
522 rc = -1;
523 goto out;
524 }
525
526 hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
527 &hba->dummy_buf_dma, GFP_KERNEL);
528 if (!hba->dummy_buffer) {
529 printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n");
530 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
531 hba->mp_bd_tbl, hba->mp_bd_dma);
532 hba->mp_bd_tbl = NULL;
533 rc = -1;
534 goto out;
535 }
536
537 mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl;
538 addr = (unsigned long) hba->dummy_buf_dma;
539 mp_bdt->buffer_addr_lo = addr & 0xffffffff;
540 mp_bdt->buffer_addr_hi = addr >> 32;
541 mp_bdt->buffer_length = PAGE_SIZE;
542 mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
543 ISCSI_BD_FIRST_IN_BD_CHAIN;
544out:
545 return rc;
546}
547
548
549/**
550 * bnx2i_free_mp_bdt - releases ITT back to free pool
551 * @hba: pointer to adapter instance
552 *
553 * free MP dummy buffer and associated BD table
554 */
555static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba)
556{
557 if (hba->mp_bd_tbl) {
558 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
559 hba->mp_bd_tbl, hba->mp_bd_dma);
560 hba->mp_bd_tbl = NULL;
561 }
562 if (hba->dummy_buffer) {
563 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
564 hba->dummy_buffer, hba->dummy_buf_dma);
565 hba->dummy_buffer = NULL;
566 }
567 return;
568}
569
570/**
571 * bnx2i_drop_session - notifies iscsid of connection error.
572 * @hba: adapter instance pointer
573 * @session: iscsi session pointer
574 *
575 * This notifies iscsid that there is a error, so it can initiate
576 * recovery.
577 *
578 * This relies on caller using the iscsi class iterator so the object
579 * is refcounted and does not disapper from under us.
580 */
581void bnx2i_drop_session(struct iscsi_cls_session *cls_session)
582{
583 iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
584}
585
586/**
587 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
588 * @hba: pointer to adapter instance
589 * @ep: pointer to endpoint (transport indentifier) structure
590 *
591 * EP destroy queue manager
592 */
593static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba,
594 struct bnx2i_endpoint *ep)
595{
596 write_lock_bh(&hba->ep_rdwr_lock);
597 list_add_tail(&ep->link, &hba->ep_destroy_list);
598 write_unlock_bh(&hba->ep_rdwr_lock);
599 return 0;
600}
601
602/**
603 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
604 *
605 * @hba: pointer to adapter instance
606 * @ep: pointer to endpoint (transport indentifier) structure
607 *
608 * EP destroy queue manager
609 */
610static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba,
611 struct bnx2i_endpoint *ep)
612{
613 write_lock_bh(&hba->ep_rdwr_lock);
614 list_del_init(&ep->link);
615 write_unlock_bh(&hba->ep_rdwr_lock);
616
617 return 0;
618}
619
620/**
621 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
622 * @hba: pointer to adapter instance
623 * @ep: pointer to endpoint (transport indentifier) structure
624 *
625 * pending conn offload completion queue manager
626 */
627static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba,
628 struct bnx2i_endpoint *ep)
629{
630 write_lock_bh(&hba->ep_rdwr_lock);
631 list_add_tail(&ep->link, &hba->ep_ofld_list);
632 write_unlock_bh(&hba->ep_rdwr_lock);
633 return 0;
634}
635
636/**
637 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
638 * @hba: pointer to adapter instance
639 * @ep: pointer to endpoint (transport indentifier) structure
640 *
641 * pending conn offload completion queue manager
642 */
643static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba,
644 struct bnx2i_endpoint *ep)
645{
646 write_lock_bh(&hba->ep_rdwr_lock);
647 list_del_init(&ep->link);
648 write_unlock_bh(&hba->ep_rdwr_lock);
649 return 0;
650}
651
652
653/**
654 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
655 *
656 * @hba: pointer to adapter instance
657 * @iscsi_cid: iscsi context ID to find
658 *
659 */
660struct bnx2i_endpoint *
661bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid)
662{
663 struct list_head *list;
664 struct list_head *tmp;
665 struct bnx2i_endpoint *ep;
666
667 read_lock_bh(&hba->ep_rdwr_lock);
668 list_for_each_safe(list, tmp, &hba->ep_ofld_list) {
669 ep = (struct bnx2i_endpoint *)list;
670
671 if (ep->ep_iscsi_cid == iscsi_cid)
672 break;
673 ep = NULL;
674 }
675 read_unlock_bh(&hba->ep_rdwr_lock);
676
677 if (!ep)
678 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
679 return ep;
680}
681
cf4e6363
MC		 682/**
683 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
684 * @hba: pointer to adapter instance
685 * @iscsi_cid: iscsi context ID to find
686 *
687 */
688struct bnx2i_endpoint *
689bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid)
690{
691 struct list_head *list;
692 struct list_head *tmp;
693 struct bnx2i_endpoint *ep;
694
695 read_lock_bh(&hba->ep_rdwr_lock);
696 list_for_each_safe(list, tmp, &hba->ep_destroy_list) {
697 ep = (struct bnx2i_endpoint *)list;
698
699 if (ep->ep_iscsi_cid == iscsi_cid)
700 break;
701 ep = NULL;
702 }
703 read_unlock_bh(&hba->ep_rdwr_lock);
704
705 if (!ep)
706 printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid);
707
708 return ep;
709}
710
46012e8b
EW		 711/**
712 * bnx2i_ep_active_list_add - add an entry to ep active list
713 * @hba: pointer to adapter instance
714 * @ep: pointer to endpoint (transport indentifier) structure
715 *
716 * current active conn queue manager
717 */
718static void bnx2i_ep_active_list_add(struct bnx2i_hba *hba,
719 struct bnx2i_endpoint *ep)
720{
721 write_lock_bh(&hba->ep_rdwr_lock);
722 list_add_tail(&ep->link, &hba->ep_active_list);
723 write_unlock_bh(&hba->ep_rdwr_lock);
724}
725
726
727/**
728 * bnx2i_ep_active_list_del - deletes an entry to ep active list
729 * @hba: pointer to adapter instance
730 * @ep: pointer to endpoint (transport indentifier) structure
731 *
732 * current active conn queue manager
733 */
734static void bnx2i_ep_active_list_del(struct bnx2i_hba *hba,
735 struct bnx2i_endpoint *ep)
736{
737 write_lock_bh(&hba->ep_rdwr_lock);
738 list_del_init(&ep->link);
739 write_unlock_bh(&hba->ep_rdwr_lock);
740}
741
742
cf4e6363
MC		 743/**
744 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
745 * @hba: pointer to adapter instance
746 * @shost: scsi host pointer
747 *
748 * Initializes 'can_queue' parameter based on how many outstanding commands
749 * the device can handle. Each device 5708/5709/57710 has different
750 * capabilities
751 */
752static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba,
753 struct Scsi_Host *shost)
754{
755 if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type))
756 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
757 else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type))
758 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709;
759 else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type))
760 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710;
761 else
762 shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708;
763}
764
765
766/**
767 * bnx2i_alloc_hba - allocate and init adapter instance
768 * @cnic: cnic device pointer
769 *
770 * allocate & initialize adapter structure and call other
771 * support routines to do per adapter initialization
772 */
773struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic)
774{
775 struct Scsi_Host *shost;
776 struct bnx2i_hba *hba;
777
778 shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0);
779 if (!shost)
780 return NULL;
781 shost->dma_boundary = cnic->pcidev->dma_mask;
782 shost->transportt = bnx2i_scsi_xport_template;
783 shost->max_id = ISCSI_MAX_CONNS_PER_HBA;
784 shost->max_channel = 0;
785 shost->max_lun = 512;
786 shost->max_cmd_len = 16;
787
788 hba = iscsi_host_priv(shost);
789 hba->shost = shost;
790 hba->netdev = cnic->netdev;
791 /* Get PCI related information and update hba struct members */
792 hba->pcidev = cnic->pcidev;
793 pci_dev_get(hba->pcidev);
794 hba->pci_did = hba->pcidev->device;
795 hba->pci_vid = hba->pcidev->vendor;
796 hba->pci_sdid = hba->pcidev->subsystem_device;
797 hba->pci_svid = hba->pcidev->subsystem_vendor;
798 hba->pci_func = PCI_FUNC(hba->pcidev->devfn);
799 hba->pci_devno = PCI_SLOT(hba->pcidev->devfn);
cf4e6363
MC		 800
801 bnx2i_identify_device(hba);
802 bnx2i_setup_host_queue_size(hba, shost);
803
804 if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) {
805 hba->regview = ioremap_nocache(hba->netdev->base_addr,
806 BNX2_MQ_CONFIG2);
807 if (!hba->regview)
808 goto ioreg_map_err;
809 } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
810 hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096);
811 if (!hba->regview)
812 goto ioreg_map_err;
813 }
814
815 if (bnx2i_setup_mp_bdt(hba))
816 goto mp_bdt_mem_err;
817
818 INIT_LIST_HEAD(&hba->ep_ofld_list);
46012e8b 819 INIT_LIST_HEAD(&hba->ep_active_list);
cf4e6363
MC		 820 INIT_LIST_HEAD(&hba->ep_destroy_list);
821 rwlock_init(&hba->ep_rdwr_lock);
822
823 hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED;
824
825 /* different values for 5708/5709/57710 */
826 hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA;
827
828 if (bnx2i_setup_free_cid_que(hba))
829 goto cid_que_err;
830
831 /* SQ/RQ/CQ size can be changed via sysfx interface */
832 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
833 if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX)
834 hba->max_sqes = sq_size;
835 else
836 hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT;
837 } else { /* 5706/5708/5709 */
838 if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX)
839 hba->max_sqes = sq_size;
840 else
841 hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT;
842 }
843
844 hba->max_rqes = rq_size;
845 hba->max_cqes = hba->max_sqes + rq_size;
846 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
847 if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX)
848 hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX;
849 } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX)
850 hba->max_cqes = BNX2I_570X_CQ_WQES_MAX;
851
852 hba->num_ccell = hba->max_sqes / 2;
853
854 spin_lock_init(&hba->lock);
855 mutex_init(&hba->net_dev_lock);
490475a9 856 init_waitqueue_head(&hba->eh_wait);
e37d2c47 857 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) {
55e15c97 858 hba->hba_shutdown_tmo = 20 * HZ;
e37d2c47
EW		 859 hba->conn_teardown_tmo = 20 * HZ;
860 hba->conn_ctx_destroy_tmo = 6 * HZ;
861 } else { /* 5706/5708/5709 */
55e15c97 862 hba->hba_shutdown_tmo = 20 * HZ;
e37d2c47
EW		 863 hba->conn_teardown_tmo = 10 * HZ;
864 hba->conn_ctx_destroy_tmo = 2 * HZ;
865 }
cf4e6363
MC		 866
867 if (iscsi_host_add(shost, &hba->pcidev->dev))
868 goto free_dump_mem;
869 return hba;
870
871free_dump_mem:
872 bnx2i_release_free_cid_que(hba);
873cid_que_err:
874 bnx2i_free_mp_bdt(hba);
875mp_bdt_mem_err:
876 if (hba->regview) {
877 iounmap(hba->regview);
878 hba->regview = NULL;
879 }
880ioreg_map_err:
881 pci_dev_put(hba->pcidev);
882 scsi_host_put(shost);
883 return NULL;
884}
885
886/**
887 * bnx2i_free_hba- releases hba structure and resources held by the adapter
888 * @hba: pointer to adapter instance
889 *
890 * free adapter structure and call various cleanup routines.
891 */
892void bnx2i_free_hba(struct bnx2i_hba *hba)
893{
894 struct Scsi_Host *shost = hba->shost;
895
896 iscsi_host_remove(shost);
897 INIT_LIST_HEAD(&hba->ep_ofld_list);
46012e8b 898 INIT_LIST_HEAD(&hba->ep_active_list);
cf4e6363
MC		 899 INIT_LIST_HEAD(&hba->ep_destroy_list);
900 pci_dev_put(hba->pcidev);
901
902 if (hba->regview) {
903 iounmap(hba->regview);
904 hba->regview = NULL;
905 }
906 bnx2i_free_mp_bdt(hba);
907 bnx2i_release_free_cid_que(hba);
908 iscsi_host_free(shost);
909}
910
911/**
912 * bnx2i_conn_free_login_resources - free DMA resources used for login process
913 * @hba: pointer to adapter instance
914 * @bnx2i_conn: iscsi connection pointer
915 *
916 * Login related resources, mostly BDT & payload DMA memory is freed
917 */
918static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba,
919 struct bnx2i_conn *bnx2i_conn)
920{
921 if (bnx2i_conn->gen_pdu.resp_bd_tbl) {
922 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
923 bnx2i_conn->gen_pdu.resp_bd_tbl,
924 bnx2i_conn->gen_pdu.resp_bd_dma);
925 bnx2i_conn->gen_pdu.resp_bd_tbl = NULL;
926 }
927
928 if (bnx2i_conn->gen_pdu.req_bd_tbl) {
929 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
930 bnx2i_conn->gen_pdu.req_bd_tbl,
931 bnx2i_conn->gen_pdu.req_bd_dma);
932 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
933 }
934
935 if (bnx2i_conn->gen_pdu.resp_buf) {
936 dma_free_coherent(&hba->pcidev->dev,
937 ISCSI_DEF_MAX_RECV_SEG_LEN,
938 bnx2i_conn->gen_pdu.resp_buf,
939 bnx2i_conn->gen_pdu.resp_dma_addr);
940 bnx2i_conn->gen_pdu.resp_buf = NULL;
941 }
942
943 if (bnx2i_conn->gen_pdu.req_buf) {
944 dma_free_coherent(&hba->pcidev->dev,
945 ISCSI_DEF_MAX_RECV_SEG_LEN,
946 bnx2i_conn->gen_pdu.req_buf,
947 bnx2i_conn->gen_pdu.req_dma_addr);
948 bnx2i_conn->gen_pdu.req_buf = NULL;
949 }
950}
951
952/**
953 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
954 * @hba: pointer to adapter instance
955 * @bnx2i_conn: iscsi connection pointer
956 *
957 * Mgmt task DNA resources are allocated in this routine.
958 */
959static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba,
960 struct bnx2i_conn *bnx2i_conn)
961{
962 /* Allocate memory for login request/response buffers */
963 bnx2i_conn->gen_pdu.req_buf =
964 dma_alloc_coherent(&hba->pcidev->dev,
965 ISCSI_DEF_MAX_RECV_SEG_LEN,
966 &bnx2i_conn->gen_pdu.req_dma_addr,
967 GFP_KERNEL);
968 if (bnx2i_conn->gen_pdu.req_buf == NULL)
969 goto login_req_buf_failure;
970
971 bnx2i_conn->gen_pdu.req_buf_size = 0;
972 bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf;
973
974 bnx2i_conn->gen_pdu.resp_buf =
975 dma_alloc_coherent(&hba->pcidev->dev,
976 ISCSI_DEF_MAX_RECV_SEG_LEN,
977 &bnx2i_conn->gen_pdu.resp_dma_addr,
978 GFP_KERNEL);
979 if (bnx2i_conn->gen_pdu.resp_buf == NULL)
980 goto login_resp_buf_failure;
981
982 bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN;
983 bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf;
984
985 bnx2i_conn->gen_pdu.req_bd_tbl =
986 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
987 &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL);
988 if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL)
989 goto login_req_bd_tbl_failure;
990
991 bnx2i_conn->gen_pdu.resp_bd_tbl =
992 dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE,
993 &bnx2i_conn->gen_pdu.resp_bd_dma,
994 GFP_KERNEL);
995 if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL)
996 goto login_resp_bd_tbl_failure;
997
998 return 0;
999
1000login_resp_bd_tbl_failure:
1001 dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE,
1002 bnx2i_conn->gen_pdu.req_bd_tbl,
1003 bnx2i_conn->gen_pdu.req_bd_dma);
1004 bnx2i_conn->gen_pdu.req_bd_tbl = NULL;
1005
1006login_req_bd_tbl_failure:
1007 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1008 bnx2i_conn->gen_pdu.resp_buf,
1009 bnx2i_conn->gen_pdu.resp_dma_addr);
1010 bnx2i_conn->gen_pdu.resp_buf = NULL;
1011login_resp_buf_failure:
1012 dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN,
1013 bnx2i_conn->gen_pdu.req_buf,
1014 bnx2i_conn->gen_pdu.req_dma_addr);
1015 bnx2i_conn->gen_pdu.req_buf = NULL;
1016login_req_buf_failure:
1017 iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data,
1018 "login resource alloc failed!!\n");
1019 return -ENOMEM;
1020
1021}
1022
1023
1024/**
1025 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1026 * @bnx2i_conn: iscsi connection pointer
1027 *
1028 * Allocates buffers and BD tables before shipping requests to cnic
1029 * for PDUs prepared by 'iscsid' daemon
1030 */
1031static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn)
1032{
1033 struct iscsi_bd *bd_tbl;
1034
1035 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl;
1036
1037 bd_tbl->buffer_addr_hi =
1038 (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32);
1039 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr;
1040 bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr -
1041 bnx2i_conn->gen_pdu.req_buf;
1042 bd_tbl->reserved0 = 0;
1043 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1044 ISCSI_BD_FIRST_IN_BD_CHAIN;
1045
1046 bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl;
1047 bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32;
1048 bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr;
1049 bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN;
1050 bd_tbl->reserved0 = 0;
1051 bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN |
1052 ISCSI_BD_FIRST_IN_BD_CHAIN;
1053}
1054
1055
1056/**
1057 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1058 * @task: transport layer task pointer
1059 *
1060 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1061 * Nop-out and Logout requests flow through this path.
1062 */
1063static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task)
1064{
1065 struct bnx2i_cmd *cmd = task->dd_data;
1066 struct bnx2i_conn *bnx2i_conn = cmd->conn;
1067 int rc = 0;
1068 char *buf;
1069 int data_len;
1070
1071 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn);
1072 switch (task->hdr->opcode & ISCSI_OPCODE_MASK) {
1073 case ISCSI_OP_LOGIN:
1074 bnx2i_send_iscsi_login(bnx2i_conn, task);
1075 break;
1076 case ISCSI_OP_NOOP_OUT:
1077 data_len = bnx2i_conn->gen_pdu.req_buf_size;
1078 buf = bnx2i_conn->gen_pdu.req_buf;
1079 if (data_len)
1080 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
cf4e6363
MC		 1081 buf, data_len, 1);
1082 else
1083 rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task,
cf4e6363
MC		 1084 NULL, 0, 1);
1085 break;
1086 case ISCSI_OP_LOGOUT:
1087 rc = bnx2i_send_iscsi_logout(bnx2i_conn, task);
1088 break;
1089 case ISCSI_OP_SCSI_TMFUNC:
1090 rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task);
1091 break;
1092 default:
1093 iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
1094 "send_gen: unsupported op 0x%x\n",
1095 task->hdr->opcode);
1096 }
1097 return rc;
1098}
1099
1100
1101/**********************************************************************
1102 * SCSI-ML Interface
1103 **********************************************************************/
1104
1105/**
1106 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1107 * @sc: SCSI-ML command pointer
1108 * @cmd: iscsi cmd pointer
1109 */
1110static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd)
1111{
1112 u32 dword;
1113 int lpcnt;
1114 u8 *srcp;
1115 u32 *dstp;
1116 u32 scsi_lun[2];
1117
1118 int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun);
1119 cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]);
1120 cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]);
1121
1122 lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword);
1123 srcp = (u8 *) sc->cmnd;
1124 dstp = (u32 *) cmd->req.cdb;
1125 while (lpcnt--) {
1126 memcpy(&dword, (const void *) srcp, 4);
1127 *dstp = cpu_to_be32(dword);
1128 srcp += 4;
1129 dstp++;
1130 }
1131 if (sc->cmd_len & 0x3) {
1132 dword = (u32) srcp[0] | ((u32) srcp[1] << 8);
1133 *dstp = cpu_to_be32(dword);
1134 }
1135}
1136
1137static void bnx2i_cleanup_task(struct iscsi_task *task)
1138{
1139 struct iscsi_conn *conn = task->conn;
1140 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1141 struct bnx2i_hba *hba = bnx2i_conn->hba;
1142
1143 /*
1144 * mgmt task or cmd was never sent to us to transmit.
1145 */
1146 if (!task->sc || task->state == ISCSI_TASK_PENDING)
1147 return;
1148 /*
1149 * need to clean-up task context to claim dma buffers
1150 */
1151 if (task->state == ISCSI_TASK_ABRT_TMF) {
1152 bnx2i_send_cmd_cleanup_req(hba, task->dd_data);
1153
1154 spin_unlock_bh(&conn->session->lock);
1155 wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl,
1156 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT));
1157 spin_lock_bh(&conn->session->lock);
1158 }
1159 bnx2i_iscsi_unmap_sg_list(task->dd_data);
1160}
1161
1162/**
1163 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1164 * @conn: transport layer conn structure pointer
1165 * @task: transport layer command structure pointer
1166 */
1167static int
1168bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task)
1169{
1170 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1171 struct bnx2i_cmd *cmd = task->dd_data;
1172
1173 memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN);
1174
1175 bnx2i_setup_cmd_wqe_template(cmd);
1176 bnx2i_conn->gen_pdu.req_buf_size = task->data_count;
1177 if (task->data_count) {
1178 memcpy(bnx2i_conn->gen_pdu.req_buf, task->data,
1179 task->data_count);
1180 bnx2i_conn->gen_pdu.req_wr_ptr =
1181 bnx2i_conn->gen_pdu.req_buf + task->data_count;
1182 }
1183 cmd->conn = conn->dd_data;
1184 cmd->scsi_cmd = NULL;
1185 return bnx2i_iscsi_send_generic_request(task);
1186}
1187
1188/**
1189 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1190 * @task: transport layer command structure pointer
1191 *
1192 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1193 */
1194static int bnx2i_task_xmit(struct iscsi_task *task)
1195{
1196 struct iscsi_conn *conn = task->conn;
1197 struct iscsi_session *session = conn->session;
1198 struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
1199 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1200 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1201 struct scsi_cmnd *sc = task->sc;
1202 struct bnx2i_cmd *cmd = task->dd_data;
1203 struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
1204
cf4e6363
MC		 1205 /*
1206 * If there is no scsi_cmnd this must be a mgmt task
1207 */
1208 if (!sc)
1209 return bnx2i_mtask_xmit(conn, task);
1210
1211 bnx2i_setup_cmd_wqe_template(cmd);
1212 cmd->req.op_code = ISCSI_OP_SCSI_CMD;
1213 cmd->conn = bnx2i_conn;
1214 cmd->scsi_cmd = sc;
1215 cmd->req.total_data_transfer_length = scsi_bufflen(sc);
1216 cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn);
1217
1218 bnx2i_iscsi_map_sg_list(cmd);
1219 bnx2i_cpy_scsi_cdb(sc, cmd);
1220
1221 cmd->req.op_attr = ISCSI_ATTR_SIMPLE;
1222 if (sc->sc_data_direction == DMA_TO_DEVICE) {
1223 cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE;
1224 cmd->req.itt = task->itt |
1225 (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1226 bnx2i_setup_write_cmd_bd_info(task);
1227 } else {
1228 if (scsi_bufflen(sc))
1229 cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ;
1230 cmd->req.itt = task->itt |
1231 (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT);
1232 }
1233
1234 cmd->req.num_bds = cmd->io_tbl.bd_valid;
1235 if (!cmd->io_tbl.bd_valid) {
1236 cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma;
1237 cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32);
1238 cmd->req.num_bds = 1;
1239 }
1240
1241 bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd);
1242 return 0;
1243}
1244
1245/**
1246 * bnx2i_session_create - create a new iscsi session
1247 * @cmds_max: max commands supported
1248 * @qdepth: scsi queue depth to support
1249 * @initial_cmdsn: initial iscsi CMDSN to be used for this session
1250 *
1251 * Creates a new iSCSI session instance on given device.
1252 */
1253static struct iscsi_cls_session *
1254bnx2i_session_create(struct iscsi_endpoint *ep,
1255 uint16_t cmds_max, uint16_t qdepth,
1256 uint32_t initial_cmdsn)
1257{
1258 struct Scsi_Host *shost;
1259 struct iscsi_cls_session *cls_session;
1260 struct bnx2i_hba *hba;
1261 struct bnx2i_endpoint *bnx2i_ep;
1262
1263 if (!ep) {
1264 printk(KERN_ERR "bnx2i: missing ep.\n");
1265 return NULL;
1266 }
1267
1268 bnx2i_ep = ep->dd_data;
1269 shost = bnx2i_ep->hba->shost;
1270 hba = iscsi_host_priv(shost);
1271 if (bnx2i_adapter_ready(hba))
1272 return NULL;
1273
1274 /*
1275 * user can override hw limit as long as it is within
1276 * the min/max.
1277 */
1278 if (cmds_max > hba->max_sqes)
1279 cmds_max = hba->max_sqes;
1280 else if (cmds_max < BNX2I_SQ_WQES_MIN)
1281 cmds_max = BNX2I_SQ_WQES_MIN;
1282
1283 cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost,
b8b9e1b8 1284 cmds_max, 0, sizeof(struct bnx2i_cmd),
cf4e6363
MC		 1285 initial_cmdsn, ISCSI_MAX_TARGET);
1286 if (!cls_session)
1287 return NULL;
1288
1289 if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data))
1290 goto session_teardown;
1291 return cls_session;
1292
1293session_teardown:
1294 iscsi_session_teardown(cls_session);
1295 return NULL;
1296}
1297
1298
1299/**
1300 * bnx2i_session_destroy - destroys iscsi session
1301 * @cls_session: pointer to iscsi cls session
1302 *
1303 * Destroys previously created iSCSI session instance and releases
1304 * all resources held by it
1305 */
1306static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session)
1307{
1308 struct iscsi_session *session = cls_session->dd_data;
1309 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1310 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1311
1312 bnx2i_destroy_cmd_pool(hba, session);
1313 iscsi_session_teardown(cls_session);
1314}
1315
1316
1317/**
1318 * bnx2i_conn_create - create iscsi connection instance
1319 * @cls_session: pointer to iscsi cls session
1320 * @cid: iscsi cid as per rfc (not NX2's CID terminology)
1321 *
1322 * Creates a new iSCSI connection instance for a given session
1323 */
1324static struct iscsi_cls_conn *
1325bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid)
1326{
1327 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1328 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1329 struct bnx2i_conn *bnx2i_conn;
1330 struct iscsi_cls_conn *cls_conn;
1331 struct iscsi_conn *conn;
1332
1333 cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn),
1334 cid);
1335 if (!cls_conn)
1336 return NULL;
1337 conn = cls_conn->dd_data;
1338
1339 bnx2i_conn = conn->dd_data;
1340 bnx2i_conn->cls_conn = cls_conn;
1341 bnx2i_conn->hba = hba;
1342 /* 'ep' ptr will be assigned in bind() call */
1343 bnx2i_conn->ep = NULL;
1344 init_completion(&bnx2i_conn->cmd_cleanup_cmpl);
1345
1346 if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) {
1347 iscsi_conn_printk(KERN_ALERT, conn,
1348 "conn_new: login resc alloc failed!!\n");
1349 goto free_conn;
1350 }
1351
1352 return cls_conn;
1353
1354free_conn:
1355 iscsi_conn_teardown(cls_conn);
1356 return NULL;
1357}
1358
1359/**
1360 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1361 * @cls_session: pointer to iscsi cls session
1362 * @cls_conn: pointer to iscsi cls conn
1363 * @transport_fd: 64-bit EP handle
1364 * @is_leading: leading connection on this session?
1365 *
1366 * Binds together iSCSI session instance, iSCSI connection instance
1367 * and the TCP connection. This routine returns error code if
1368 * TCP connection does not belong on the device iSCSI sess/conn
1369 * is bound
1370 */
1371static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session,
1372 struct iscsi_cls_conn *cls_conn,
1373 uint64_t transport_fd, int is_leading)
1374{
1375 struct iscsi_conn *conn = cls_conn->dd_data;
1376 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1377 struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
1378 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1379 struct bnx2i_endpoint *bnx2i_ep;
1380 struct iscsi_endpoint *ep;
1381 int ret_code;
1382
1383 ep = iscsi_lookup_endpoint(transport_fd);
1384 if (!ep)
1385 return -EINVAL;
842158d7
EW		 1386 /*
1387 * Forcefully terminate all in progress connection recovery at the
1388 * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1389 */
1390 if (bnx2i_adapter_ready(hba))
1391 return -EIO;
cf4e6363
MC		 1392
1393 bnx2i_ep = ep->dd_data;
1394 if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) ||
1395 (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD))
1396 /* Peer disconnect via' FIN or RST */
1397 return -EINVAL;
1398
1399 if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1400 return -EINVAL;
1401
1402 if (bnx2i_ep->hba != hba) {
1403 /* Error - TCP connection does not belong to this device
1404 */
1405 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1406 "conn bind, ep=0x%p (%s) does not",
1407 bnx2i_ep, bnx2i_ep->hba->netdev->name);
1408 iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data,
1409 "belong to hba (%s)\n",
1410 hba->netdev->name);
1411 return -EEXIST;
1412 }
cf4e6363
MC		 1413 bnx2i_ep->conn = bnx2i_conn;
1414 bnx2i_conn->ep = bnx2i_ep;
1415 bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid;
1416 bnx2i_conn->fw_cid = bnx2i_ep->ep_cid;
cf4e6363
MC		 1417
1418 ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn,
1419 bnx2i_ep->ep_iscsi_cid);
1420
1421 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1422 * driver needs to explicitly replenish RQ index during setup.
1423 */
1424 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1425 bnx2i_put_rq_buf(bnx2i_conn, 0);
1426
1427 bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE);
1428 return ret_code;
1429}
1430
1431
1432/**
1433 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1434 * @cls_conn: pointer to iscsi cls conn
1435 *
1436 * Destroy an iSCSI connection instance and release memory resources held by
1437 * this connection
1438 */
1439static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn)
1440{
1441 struct iscsi_conn *conn = cls_conn->dd_data;
1442 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1443 struct Scsi_Host *shost;
1444 struct bnx2i_hba *hba;
1445
1446 shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn));
1447 hba = iscsi_host_priv(shost);
1448
1449 bnx2i_conn_free_login_resources(hba, bnx2i_conn);
1450 iscsi_conn_teardown(cls_conn);
1451}
1452
1453
1454/**
1455 * bnx2i_conn_get_param - return iscsi connection parameter to caller
1456 * @cls_conn: pointer to iscsi cls conn
1457 * @param: parameter type identifier
1458 * @buf: buffer pointer
1459 *
1460 * returns iSCSI connection parameters
1461 */
1462static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn,
1463 enum iscsi_param param, char *buf)
1464{
1465 struct iscsi_conn *conn = cls_conn->dd_data;
1466 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1467 int len = 0;
1468
7a2962c7
EW		 1469 if (!(bnx2i_conn && bnx2i_conn->ep && bnx2i_conn->ep->hba))
1470 goto out;
1471
cf4e6363
MC		 1472 switch (param) {
1473 case ISCSI_PARAM_CONN_PORT:
7a2962c7
EW		 1474 mutex_lock(&bnx2i_conn->ep->hba->net_dev_lock);
1475 if (bnx2i_conn->ep->cm_sk)
cf4e6363
MC		 1476 len = sprintf(buf, "%hu\n",
1477 bnx2i_conn->ep->cm_sk->dst_port);
7a2962c7 1478 mutex_unlock(&bnx2i_conn->ep->hba->net_dev_lock);
cf4e6363
MC		 1479 break;
1480 case ISCSI_PARAM_CONN_ADDRESS:
7a2962c7
EW		 1481 mutex_lock(&bnx2i_conn->ep->hba->net_dev_lock);
1482 if (bnx2i_conn->ep->cm_sk)
d9573e7a
JP		 1483 len = sprintf(buf, "%pI4\n",
1484 &bnx2i_conn->ep->cm_sk->dst_ip);
7a2962c7 1485 mutex_unlock(&bnx2i_conn->ep->hba->net_dev_lock);
cf4e6363
MC		 1486 break;
1487 default:
1488 return iscsi_conn_get_param(cls_conn, param, buf);
1489 }
7a2962c7 1490out:
cf4e6363
MC		 1491 return len;
1492}
1493
1494/**
1495 * bnx2i_host_get_param - returns host (adapter) related parameters
1496 * @shost: scsi host pointer
1497 * @param: parameter type identifier
1498 * @buf: buffer pointer
1499 */
1500static int bnx2i_host_get_param(struct Scsi_Host *shost,
1501 enum iscsi_host_param param, char *buf)
1502{
1503 struct bnx2i_hba *hba = iscsi_host_priv(shost);
1504 int len = 0;
1505
1506 switch (param) {
1507 case ISCSI_HOST_PARAM_HWADDRESS:
1508 len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6);
1509 break;
1510 case ISCSI_HOST_PARAM_NETDEV_NAME:
1511 len = sprintf(buf, "%s\n", hba->netdev->name);
1512 break;
625986c2
MC		 1513 case ISCSI_HOST_PARAM_IPADDRESS: {
1514 struct list_head *active_list = &hba->ep_active_list;
1515
1516 read_lock_bh(&hba->ep_rdwr_lock);
1517 if (!list_empty(&hba->ep_active_list)) {
1518 struct bnx2i_endpoint *bnx2i_ep;
1519 struct cnic_sock *csk;
1520
1521 bnx2i_ep = list_first_entry(active_list,
1522 struct bnx2i_endpoint,
1523 link);
1524 csk = bnx2i_ep->cm_sk;
1525 if (test_bit(SK_F_IPV6, &csk->flags))
1526 len = sprintf(buf, "%pI6\n", csk->src_ip);
1527 else
1528 len = sprintf(buf, "%pI4\n", csk->src_ip);
1529 }
1530 read_unlock_bh(&hba->ep_rdwr_lock);
1531 break;
1532 }
cf4e6363
MC		 1533 default:
1534 return iscsi_host_get_param(shost, param, buf);
1535 }
1536 return len;
1537}
1538
1539/**
1540 * bnx2i_conn_start - completes iscsi connection migration to FFP
1541 * @cls_conn: pointer to iscsi cls conn
1542 *
1543 * last call in FFP migration to handover iscsi conn to the driver
1544 */
1545static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn)
1546{
1547 struct iscsi_conn *conn = cls_conn->dd_data;
1548 struct bnx2i_conn *bnx2i_conn = conn->dd_data;
1549
1550 bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START;
1551 bnx2i_update_iscsi_conn(conn);
1552
1553 /*
1554 * this should normally not sleep for a long time so it should
1555 * not disrupt the caller.
1556 */
1557 bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies;
1558 bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1559 bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep;
1560 add_timer(&bnx2i_conn->ep->ofld_timer);
1561 /* update iSCSI context for this conn, wait for CNIC to complete */
1562 wait_event_interruptible(bnx2i_conn->ep->ofld_wait,
1563 bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START);
1564
1565 if (signal_pending(current))
1566 flush_signals(current);
1567 del_timer_sync(&bnx2i_conn->ep->ofld_timer);
1568
1569 iscsi_conn_start(cls_conn);
1570 return 0;
1571}
1572
1573
1574/**
1575 * bnx2i_conn_get_stats - returns iSCSI stats
1576 * @cls_conn: pointer to iscsi cls conn
1577 * @stats: pointer to iscsi statistic struct
1578 */
1579static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn,
1580 struct iscsi_stats *stats)
1581{
1582 struct iscsi_conn *conn = cls_conn->dd_data;
1583
1584 stats->txdata_octets = conn->txdata_octets;
1585 stats->rxdata_octets = conn->rxdata_octets;
1586 stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
1587 stats->dataout_pdus = conn->dataout_pdus_cnt;
1588 stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
1589 stats->datain_pdus = conn->datain_pdus_cnt;
1590 stats->r2t_pdus = conn->r2t_pdus_cnt;
1591 stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
1592 stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
1593 stats->custom_length = 3;
1594 strcpy(stats->custom[2].desc, "eh_abort_cnt");
1595 stats->custom[2].value = conn->eh_abort_cnt;
1596 stats->digest_err = 0;
1597 stats->timeout_err = 0;
1598 stats->custom_length = 0;
1599}
1600
1601
1602/**
1603 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1604 * @dst_addr: target IP address
1605 *
1606 * check if route resolves to BNX2 device
1607 */
1608static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr)
1609{
1610 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1611 struct bnx2i_hba *hba;
1612 struct cnic_dev *cnic = NULL;
1613
cf4e6363
MC		 1614 hba = get_adapter_list_head();
1615 if (hba && hba->cnic)
1616 cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI);
1617 if (!cnic) {
1618 printk(KERN_ALERT "bnx2i: no route,"
1619 "can't connect using cnic\n");
1620 goto no_nx2_route;
1621 }
1622 hba = bnx2i_find_hba_for_cnic(cnic);
1623 if (!hba)
1624 goto no_nx2_route;
1625
1626 if (bnx2i_adapter_ready(hba)) {
1627 printk(KERN_ALERT "bnx2i: check route, hba not found\n");
1628 goto no_nx2_route;
1629 }
1630 if (hba->netdev->mtu > hba->mtu_supported) {
1631 printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n",
1632 hba->netdev->name, hba->netdev->mtu);
1633 printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n",
1634 hba->mtu_supported);
1635 goto no_nx2_route;
1636 }
1637 return hba;
1638no_nx2_route:
1639 return NULL;
1640}
1641
1642
1643/**
1644 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1645 * @hba: pointer to adapter instance
1646 * @ep: endpoint (transport indentifier) structure
1647 *
1648 * destroys cm_sock structure and on chip iscsi context
1649 */
1650static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
1651 struct bnx2i_endpoint *ep)
1652{
5bf3f39f 1653 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic) && ep->cm_sk)
cf4e6363
MC		 1654 hba->cnic->cm_destroy(ep->cm_sk);
1655
cf4e6363
MC		 1656 if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) &&
1657 ep->state == EP_STATE_DISCONN_TIMEDOUT) {
5bf3f39f
EW		 1658 if (ep->conn && ep->conn->cls_conn &&
1659 ep->conn->cls_conn->dd_data) {
1660 struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
1661
1662 /* Must suspend all rx queue activity for this ep */
1663 set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
1664 }
1665 /* CONN_DISCONNECT timeout may or may not be an issue depending
1666 * on what transcribed in TCP layer, different targets behave
1667 * differently
1668 */
1669 printk(KERN_ALERT "bnx2i (%s): - WARN - CONN_DISCON timed out, "
1670 "please submit GRC Dump, NW/PCIe trace, "
1671 "driver msgs to developers for analysis\n",
1672 hba->netdev->name);
cf4e6363
MC		 1673 }
1674
1675 ep->state = EP_STATE_CLEANUP_START;
1676 init_timer(&ep->ofld_timer);
e37d2c47 1677 ep->ofld_timer.expires = hba->conn_ctx_destroy_tmo + jiffies;
cf4e6363
MC		 1678 ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1679 ep->ofld_timer.data = (unsigned long) ep;
1680 add_timer(&ep->ofld_timer);
1681
1682 bnx2i_ep_destroy_list_add(hba, ep);
1683
1684 /* destroy iSCSI context, wait for it to complete */
1685 bnx2i_send_conn_destroy(hba, ep);
1686 wait_event_interruptible(ep->ofld_wait,
1687 (ep->state != EP_STATE_CLEANUP_START));
1688
1689 if (signal_pending(current))
1690 flush_signals(current);
1691 del_timer_sync(&ep->ofld_timer);
1692
1693 bnx2i_ep_destroy_list_del(hba, ep);
1694
1695 if (ep->state != EP_STATE_CLEANUP_CMPL)
1696 /* should never happen */
1697 printk(KERN_ALERT "bnx2i - conn destroy failed\n");
1698
1699 return 0;
1700}
1701
1702
1703/**
1704 * bnx2i_ep_connect - establish TCP connection to target portal
1705 * @shost: scsi host
1706 * @dst_addr: target IP address
1707 * @non_blocking: blocking or non-blocking call
1708 *
1709 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1710 * with l5_core and the CNIC. This is a multi-step process of resolving
1711 * route to target, create a iscsi connection context, handshaking with
1712 * CNIC module to create/initialize the socket struct and finally
1713 * sending down option-2 request to complete TCP 3-way handshake
1714 */
1715static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
1716 struct sockaddr *dst_addr,
1717 int non_blocking)
1718{
1719 u32 iscsi_cid = BNX2I_CID_RESERVED;
1720 struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr;
1721 struct sockaddr_in6 *desti6;
1722 struct bnx2i_endpoint *bnx2i_ep;
1723 struct bnx2i_hba *hba;
1724 struct cnic_dev *cnic;
1725 struct cnic_sockaddr saddr;
1726 struct iscsi_endpoint *ep;
1727 int rc = 0;
1728
fac3cc45 1729 if (shost) {
cf4e6363
MC		 1730 /* driver is given scsi host to work with */
1731 hba = iscsi_host_priv(shost);
fac3cc45 1732 } else
cf4e6363
MC		 1733 /*
1734 * check if the given destination can be reached through
1735 * a iscsi capable NetXtreme2 device
1736 */
1737 hba = bnx2i_check_route(dst_addr);
fac3cc45 1738
490475a9
AV		 1739 if (!hba || test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state)) {
1740 rc = -EINVAL;
55e15c97 1741 goto nohba;
cf4e6363
MC		 1742 }
1743
1744 cnic = hba->cnic;
55e15c97 1745 mutex_lock(&hba->net_dev_lock);
cf4e6363
MC		 1746 ep = bnx2i_alloc_ep(hba);
1747 if (!ep) {
1748 rc = -ENOMEM;
1749 goto check_busy;
1750 }
1751 bnx2i_ep = ep->dd_data;
1752
cf4e6363
MC		 1753 if (bnx2i_adapter_ready(hba)) {
1754 rc = -EPERM;
1755 goto net_if_down;
1756 }
1757
cf4e6363
MC		 1758 bnx2i_ep->num_active_cmds = 0;
1759 iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
1760 if (iscsi_cid == -1) {
1761 printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n");
1762 rc = -ENOMEM;
1763 goto iscsi_cid_err;
1764 }
1765 bnx2i_ep->hba_age = hba->age;
1766
1767 rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep);
1768 if (rc != 0) {
1769 printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n");
1770 rc = -ENOMEM;
1771 goto qp_resc_err;
1772 }
1773
1774 bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid;
1775 bnx2i_ep->state = EP_STATE_OFLD_START;
1776 bnx2i_ep_ofld_list_add(hba, bnx2i_ep);
1777
1778 init_timer(&bnx2i_ep->ofld_timer);
1779 bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies;
1780 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1781 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1782 add_timer(&bnx2i_ep->ofld_timer);
1783
1784 bnx2i_send_conn_ofld_req(hba, bnx2i_ep);
1785
1786 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1787 wait_event_interruptible(bnx2i_ep->ofld_wait,
1788 bnx2i_ep->state != EP_STATE_OFLD_START);
1789
1790 if (signal_pending(current))
1791 flush_signals(current);
1792 del_timer_sync(&bnx2i_ep->ofld_timer);
1793
1794 bnx2i_ep_ofld_list_del(hba, bnx2i_ep);
1795
1796 if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) {
1797 rc = -ENOSPC;
1798 goto conn_failed;
1799 }
1800
1801 rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid,
1802 iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep);
1803 if (rc) {
1804 rc = -EINVAL;
1805 goto conn_failed;
1806 }
1807
1808 bnx2i_ep->cm_sk->rcv_buf = 256 * 1024;
1809 bnx2i_ep->cm_sk->snd_buf = 256 * 1024;
1810 clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags);
1811
1812 memset(&saddr, 0, sizeof(saddr));
1813 if (dst_addr->sa_family == AF_INET) {
1814 desti = (struct sockaddr_in *) dst_addr;
1815 saddr.remote.v4 = *desti;
1816 saddr.local.v4.sin_family = desti->sin_family;
1817 } else if (dst_addr->sa_family == AF_INET6) {
1818 desti6 = (struct sockaddr_in6 *) dst_addr;
1819 saddr.remote.v6 = *desti6;
1820 saddr.local.v6.sin6_family = desti6->sin6_family;
1821 }
1822
1823 bnx2i_ep->timestamp = jiffies;
1824 bnx2i_ep->state = EP_STATE_CONNECT_START;
1825 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
1826 rc = -EINVAL;
1827 goto conn_failed;
1828 } else
1829 rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr);
cf4e6363
MC		 1830 if (rc)
1831 goto release_ep;
1832
46012e8b
EW		 1833 bnx2i_ep_active_list_add(hba, bnx2i_ep);
1834
cf4e6363 1835 if (bnx2i_map_ep_dbell_regs(bnx2i_ep))
46012e8b
EW		 1836 goto del_active_ep;
1837
cf4e6363
MC		 1838 mutex_unlock(&hba->net_dev_lock);
1839 return ep;
1840
46012e8b
EW		 1841del_active_ep:
1842 bnx2i_ep_active_list_del(hba, bnx2i_ep);
cf4e6363
MC		 1843release_ep:
1844 if (bnx2i_tear_down_conn(hba, bnx2i_ep)) {
1845 mutex_unlock(&hba->net_dev_lock);
1846 return ERR_PTR(rc);
1847 }
1848conn_failed:
1849net_if_down:
1850iscsi_cid_err:
1851 bnx2i_free_qp_resc(hba, bnx2i_ep);
1852qp_resc_err:
1853 bnx2i_free_ep(ep);
cf4e6363 1854check_busy:
55e15c97
EW		 1855 mutex_unlock(&hba->net_dev_lock);
1856nohba:
cf4e6363
MC		 1857 return ERR_PTR(rc);
1858}
1859
1860
1861/**
1862 * bnx2i_ep_poll - polls for TCP connection establishement
1863 * @ep: TCP connection (endpoint) handle
1864 * @timeout_ms: timeout value in milli secs
1865 *
1866 * polls for TCP connect request to complete
1867 */
1868static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1869{
1870 struct bnx2i_endpoint *bnx2i_ep;
1871 int rc = 0;
1872
1873 bnx2i_ep = ep->dd_data;
1874 if ((bnx2i_ep->state == EP_STATE_IDLE) ||
1875 (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) ||
1876 (bnx2i_ep->state == EP_STATE_OFLD_FAILED))
1877 return -1;
1878 if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL)
1879 return 1;
1880
1881 rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait,
1882 ((bnx2i_ep->state ==
1883 EP_STATE_OFLD_FAILED) ||
1884 (bnx2i_ep->state ==
1885 EP_STATE_CONNECT_FAILED) ||
1886 (bnx2i_ep->state ==
1887 EP_STATE_CONNECT_COMPL)),
1888 msecs_to_jiffies(timeout_ms));
490475a9 1889 if (bnx2i_ep->state == EP_STATE_OFLD_FAILED)
cf4e6363
MC		 1890 rc = -1;
1891
1892 if (rc > 0)
1893 return 1;
1894 else if (!rc)
1895 return 0; /* timeout */
1896 else
1897 return rc;
1898}
1899
1900
1901/**
1902 * bnx2i_ep_tcp_conn_active - check EP state transition
1903 * @ep: endpoint pointer
1904 *
1905 * check if underlying TCP connection is active
1906 */
1907static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep)
1908{
1909 int ret;
1910 int cnic_dev_10g = 0;
1911
1912 if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type))
1913 cnic_dev_10g = 1;
1914
1915 switch (bnx2i_ep->state) {
94810e82 1916 case EP_STATE_CONNECT_FAILED:
cf4e6363
MC		 1917 case EP_STATE_CLEANUP_FAILED:
1918 case EP_STATE_OFLD_FAILED:
1919 case EP_STATE_DISCONN_TIMEDOUT:
1920 ret = 0;
1921 break;
252e4480 1922 case EP_STATE_CONNECT_START:
cf4e6363
MC		 1923 case EP_STATE_CONNECT_COMPL:
1924 case EP_STATE_ULP_UPDATE_START:
1925 case EP_STATE_ULP_UPDATE_COMPL:
1926 case EP_STATE_TCP_FIN_RCVD:
2eefb20d
EW		 1927 case EP_STATE_LOGOUT_SENT:
1928 case EP_STATE_LOGOUT_RESP_RCVD:
cf4e6363
MC		 1929 case EP_STATE_ULP_UPDATE_FAILED:
1930 ret = 1;
1931 break;
1932 case EP_STATE_TCP_RST_RCVD:
cf4e6363 1933 if (cnic_dev_10g)
cf4e6363 1934 ret = 0;
94810e82
EW		 1935 else
1936 ret = 1;
cf4e6363
MC		 1937 break;
1938 default:
1939 ret = 0;
1940 }
1941
1942 return ret;
1943}
1944
1945
6447f286
EW		 1946/*
1947 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
1948 * @ep: TCP connection (bnx2i endpoint) handle
cf4e6363
MC		 1949 *
1950 * executes TCP connection teardown process
1951 */
6447f286 1952int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep)
cf4e6363 1953{
6447f286 1954 struct bnx2i_hba *hba = bnx2i_ep->hba;
cf4e6363 1955 struct cnic_dev *cnic;
6447f286
EW		 1956 struct iscsi_session *session = NULL;
1957 struct iscsi_conn *conn = NULL;
1958 int ret = 0;
2eefb20d
EW		 1959 int close = 0;
1960 int close_ret = 0;
cf4e6363 1961
6447f286
EW		 1962 if (!hba)
1963 return 0;
cf4e6363 1964
6447f286
EW		 1965 cnic = hba->cnic;
1966 if (!cnic)
1967 return 0;
1968
250ae982
EW		 1969 if (bnx2i_ep->state == EP_STATE_IDLE)
1970 return 0;
1971
6447f286
EW		 1972 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep))
1973 goto destroy_conn;
cf4e6363
MC		 1974
1975 if (bnx2i_ep->conn) {
6447f286 1976 conn = bnx2i_ep->conn->cls_conn->dd_data;
cf4e6363 1977 session = conn->session;
cf4e6363
MC		 1978 }
1979
cf4e6363 1980 init_timer(&bnx2i_ep->ofld_timer);
e37d2c47 1981 bnx2i_ep->ofld_timer.expires = hba->conn_teardown_tmo + jiffies;
cf4e6363
MC		 1982 bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer;
1983 bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep;
1984 add_timer(&bnx2i_ep->ofld_timer);
1985
2eefb20d 1986 if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic))
6447f286 1987 goto out;
cf4e6363 1988
2eefb20d
EW		 1989 if (session) {
1990 spin_lock_bh(&session->lock);
1991 if (bnx2i_ep->state != EP_STATE_TCP_FIN_RCVD) {
1992 if (session->state == ISCSI_STATE_LOGGING_OUT) {
1993 if (bnx2i_ep->state == EP_STATE_LOGOUT_SENT) {
1994 /* Logout sent, but no resp */
1995 printk(KERN_ALERT "bnx2i - WARNING "
1996 "logout response was not "
1997 "received!\n");
1998 } else if (bnx2i_ep->state ==
1999 EP_STATE_LOGOUT_RESP_RCVD)
2000 close = 1;
2001 }
2002 } else
2003 close = 1;
2004
2005 spin_unlock_bh(&session->lock);
2006 }
2007
2008 bnx2i_ep->state = EP_STATE_DISCONN_START;
2009
2010 if (close)
2011 close_ret = cnic->cm_close(bnx2i_ep->cm_sk);
2012 else
2013 close_ret = cnic->cm_abort(bnx2i_ep->cm_sk);
2014
2c2255e0 2015 /* No longer allow CFC delete if cm_close/abort fails the request */
2eefb20d 2016 if (close_ret)
2c2255e0
EW		 2017 printk(KERN_ALERT "bnx2i: %s close/abort(%d) returned %d\n",
2018 bnx2i_ep->hba->netdev->name, close, close_ret);
2019 else
2020 /* wait for option-2 conn teardown */
2021 wait_event_interruptible(bnx2i_ep->ofld_wait,
cf4e6363
MC		 2022 bnx2i_ep->state != EP_STATE_DISCONN_START);
2023
2024 if (signal_pending(current))
2025 flush_signals(current);
2026 del_timer_sync(&bnx2i_ep->ofld_timer);
2027
6447f286 2028destroy_conn:
46012e8b 2029 bnx2i_ep_active_list_del(hba, bnx2i_ep);
6447f286
EW		 2030 if (bnx2i_tear_down_conn(hba, bnx2i_ep))
2031 ret = -EINVAL;
2032out:
2033 bnx2i_ep->state = EP_STATE_IDLE;
2034 return ret;
2035}
2036
2037
2038/**
2039 * bnx2i_ep_disconnect - executes TCP connection teardown process
2040 * @ep: TCP connection (iscsi endpoint) handle
2041 *
2042 * executes TCP connection teardown process
2043 */
2044static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep)
2045{
2046 struct bnx2i_endpoint *bnx2i_ep;
2047 struct bnx2i_conn *bnx2i_conn = NULL;
2048 struct iscsi_conn *conn = NULL;
2049 struct bnx2i_hba *hba;
2050
2051 bnx2i_ep = ep->dd_data;
2052
2053 /* driver should not attempt connection cleanup until TCP_CONNECT
2054 * completes either successfully or fails. Timeout is 9-secs, so
2055 * wait for it to complete
2056 */
2057 while ((bnx2i_ep->state == EP_STATE_CONNECT_START) &&
2058 !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ)))
2059 msleep(250);
2060
2061 if (bnx2i_ep->conn) {
2062 bnx2i_conn = bnx2i_ep->conn;
2063 conn = bnx2i_conn->cls_conn->dd_data;
2064 iscsi_suspend_queue(conn);
2065 }
2066 hba = bnx2i_ep->hba;
2067
2068 mutex_lock(&hba->net_dev_lock);
2069
2070 if (bnx2i_ep->state == EP_STATE_IDLE)
2071 goto return_bnx2i_ep;
2072
2073 if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state))
2074 goto free_resc;
2075
2076 if (bnx2i_ep->hba_age != hba->age)
2077 goto free_resc;
2078
2079 /* Do all chip cleanup here */
2080 if (bnx2i_hw_ep_disconnect(bnx2i_ep)) {
cf4e6363
MC		 2081 mutex_unlock(&hba->net_dev_lock);
2082 return;
2083 }
2084free_resc:
cf4e6363
MC		 2085 bnx2i_free_qp_resc(hba, bnx2i_ep);
2086return_bnx2i_ep:
2087 if (bnx2i_conn)
2088 bnx2i_conn->ep = NULL;
2089
2090 bnx2i_free_ep(ep);
6447f286 2091 mutex_unlock(&hba->net_dev_lock);
490475a9
AV		 2092
2093 wake_up_interruptible(&hba->eh_wait);
cf4e6363
MC		 2094}
2095
2096
2097/**
2098 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2099 * @buf: pointer to buffer containing iscsi path message
2100 *
2101 */
2102static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params)
2103{
2104 struct bnx2i_hba *hba = iscsi_host_priv(shost);
2105 char *buf = (char *) params;
2106 u16 len = sizeof(*params);
2107
2108 /* handled by cnic driver */
2109 hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf,
2110 len);
2111
2112 return 0;
2113}
2114
2115
2116/*
2117 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2118 * used while registering with the scsi host and iSCSI transport module.
2119 */
2120static struct scsi_host_template bnx2i_host_template = {
2121 .module = THIS_MODULE,
2122 .name = "Broadcom Offload iSCSI Initiator",
2123 .proc_name = "bnx2i",
2124 .queuecommand = iscsi_queuecommand,
2125 .eh_abort_handler = iscsi_eh_abort,
2126 .eh_device_reset_handler = iscsi_eh_device_reset,
309ce156 2127 .eh_target_reset_handler = iscsi_eh_recover_target,
9f9127fd 2128 .change_queue_depth = iscsi_change_queue_depth,
cf4e6363
MC		 2129 .can_queue = 1024,
2130 .max_sectors = 127,
2131 .cmd_per_lun = 32,
2132 .this_id = -1,
2133 .use_clustering = ENABLE_CLUSTERING,
2134 .sg_tablesize = ISCSI_MAX_BDS_PER_CMD,
2135 .shost_attrs = bnx2i_dev_attributes,
2136};
2137
2138struct iscsi_transport bnx2i_iscsi_transport = {
2139 .owner = THIS_MODULE,
2140 .name = "bnx2i",
2141 .caps = CAP_RECOVERY_L0 | CAP_HDRDGST |
2142 CAP_MULTI_R2T | CAP_DATADGST |
2143 CAP_DATA_PATH_OFFLOAD,
2144 .param_mask = ISCSI_MAX_RECV_DLENGTH |
2145 ISCSI_MAX_XMIT_DLENGTH |
2146 ISCSI_HDRDGST_EN |
2147 ISCSI_DATADGST_EN |
2148 ISCSI_INITIAL_R2T_EN |
2149 ISCSI_MAX_R2T |
2150 ISCSI_IMM_DATA_EN |
2151 ISCSI_FIRST_BURST |
2152 ISCSI_MAX_BURST |
2153 ISCSI_PDU_INORDER_EN |
2154 ISCSI_DATASEQ_INORDER_EN |
2155 ISCSI_ERL |
2156 ISCSI_CONN_PORT |
2157 ISCSI_CONN_ADDRESS |
2158 ISCSI_EXP_STATSN |
2159 ISCSI_PERSISTENT_PORT |
2160 ISCSI_PERSISTENT_ADDRESS |
2161 ISCSI_TARGET_NAME | ISCSI_TPGT |
2162 ISCSI_USERNAME | ISCSI_PASSWORD |
2163 ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
2164 ISCSI_FAST_ABORT | ISCSI_ABORT_TMO |
3fe5ae8b 2165 ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO |
cf4e6363
MC		 2166 ISCSI_PING_TMO | ISCSI_RECV_TMO |
2167 ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME,
625986c2
MC		 2168 .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
2169 ISCSI_HOST_NETDEV_NAME,
cf4e6363
MC		 2170 .create_session = bnx2i_session_create,
2171 .destroy_session = bnx2i_session_destroy,
2172 .create_conn = bnx2i_conn_create,
2173 .bind_conn = bnx2i_conn_bind,
2174 .destroy_conn = bnx2i_conn_destroy,
2175 .set_param = iscsi_set_param,
2176 .get_conn_param = bnx2i_conn_get_param,
2177 .get_session_param = iscsi_session_get_param,
2178 .get_host_param = bnx2i_host_get_param,
2179 .start_conn = bnx2i_conn_start,
2180 .stop_conn = iscsi_conn_stop,
2181 .send_pdu = iscsi_conn_send_pdu,
2182 .xmit_task = bnx2i_task_xmit,
2183 .get_stats = bnx2i_conn_get_stats,
2184 /* TCP connect - disconnect - option-2 interface calls */
2185 .ep_connect = bnx2i_ep_connect,
2186 .ep_poll = bnx2i_ep_poll,
2187 .ep_disconnect = bnx2i_ep_disconnect,
2188 .set_path = bnx2i_nl_set_path,
2189 /* Error recovery timeout call */
2190 .session_recovery_timedout = iscsi_session_recovery_timedout,
2191 .cleanup_task = bnx2i_cleanup_task,
2192};
Linux kernel - Deliverables
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