2 * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
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
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.
12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
15 #include <linux/slab.h>
16 #include <scsi/scsi_tcq.h>
17 #include <scsi/libiscsi.h>
20 struct scsi_transport_template
*bnx2i_scsi_xport_template
;
21 struct iscsi_transport bnx2i_iscsi_transport
;
22 static struct scsi_host_template bnx2i_host_template
;
25 * Global endpoint resource info
27 static DEFINE_SPINLOCK(bnx2i_resc_lock
); /* protects global resources */
30 static int bnx2i_adapter_ready(struct bnx2i_hba
*hba
)
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
))
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
49 * identifies & marks various bd info for scsi command's imm data,
50 * unsolicited data and the first solicited data seq.
52 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd
*cmd
, u32 buf_off
,
53 u32
*start_bd_off
, u32
*start_bd_idx
)
55 struct iscsi_bd
*bd_tbl
= cmd
->io_tbl
.bd_tbl
;
60 while (buf_off
>= (cur_offset
+ bd_tbl
->buffer_length
)) {
61 cur_offset
+= bd_tbl
->buffer_length
;
67 *start_bd_off
= buf_off
- cur_offset
;
68 *start_bd_idx
= cur_bd_idx
;
72 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
73 * @task: transport layer's cmd struct pointer
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.
80 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task
*task
)
82 struct bnx2i_cmd
*cmd
= task
->dd_data
;
85 u32 buffer_offset
= 0;
86 u32 cmd_len
= cmd
->req
.total_data_transfer_length
;
88 /* if ImmediateData is turned off & IntialR2T is turned on,
89 * there will be no immediate or unsolicited data, just return.
91 if (!iscsi_task_has_unsol_data(task
) && !task
->imm_count
)
95 buffer_offset
+= task
->imm_count
;
96 if (task
->imm_count
== cmd_len
)
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
;
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
))) {
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
].\
125 cmd
->req
.sd_buffer_offset
= start_bd_offset
;
126 cmd
->req
.sd_start_bd_index
= start_bd_idx
;
133 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
134 * @hba: adapter instance
135 * @cmd: iscsi cmd struct pointer
139 static int bnx2i_map_scsi_sg(struct bnx2i_hba
*hba
, struct bnx2i_cmd
*cmd
)
141 struct scsi_cmnd
*sc
= cmd
->scsi_cmd
;
142 struct iscsi_bd
*bd
= cmd
->io_tbl
.bd_tbl
;
143 struct scatterlist
*sg
;
151 BUG_ON(scsi_sg_count(sc
) > ISCSI_MAX_BDS_PER_CMD
);
153 sg_count
= scsi_dma_map(sc
);
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;
163 bd
[bd_count
].flags
= ISCSI_BD_FIRST_IN_BD_CHAIN
;
165 byte_count
+= sg_len
;
170 bd
[bd_count
- 1].flags
|= ISCSI_BD_LAST_IN_BD_CHAIN
;
172 BUG_ON(byte_count
!= scsi_bufflen(sc
));
177 * bnx2i_iscsi_map_sg_list - maps SG list
178 * @cmd: iscsi cmd struct pointer
180 * creates BD list table for the command
182 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd
*cmd
)
186 bd_count
= bnx2i_map_scsi_sg(cmd
->conn
->hba
, cmd
);
188 struct iscsi_bd
*bd
= cmd
->io_tbl
.bd_tbl
;
190 bd
[0].buffer_addr_lo
= bd
[0].buffer_addr_hi
= 0;
191 bd
[0].buffer_length
= bd
[0].flags
= 0;
193 cmd
->io_tbl
.bd_valid
= bd_count
;
198 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
199 * @cmd: iscsi cmd struct pointer
201 * unmap IO buffers and invalidate the BD table
203 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd
*cmd
)
205 struct scsi_cmnd
*sc
= cmd
->scsi_cmd
;
207 if (cmd
->io_tbl
.bd_valid
&& sc
) {
209 cmd
->io_tbl
.bd_valid
= 0;
213 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd
*cmd
)
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);
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)
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
234 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba
*hba
,
235 struct bnx2i_conn
*bnx2i_conn
,
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
);
244 hba
->cid_que
.conn_cid_tbl
[iscsi_cid
] = bnx2i_conn
;
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)
254 struct bnx2i_conn
*bnx2i_get_conn_from_id(struct bnx2i_hba
*hba
,
257 if (!hba
->cid_que
.conn_cid_tbl
) {
258 printk(KERN_ERR
"bnx2i: ERROR - missing conn<->cid table\n");
261 } else if (iscsi_cid
>= hba
->max_active_conns
) {
262 printk(KERN_ERR
"bnx2i: wrong cid #%d\n", iscsi_cid
);
265 return hba
->cid_que
.conn_cid_tbl
[iscsi_cid
];
270 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
271 * @hba: pointer to adapter instance
273 static u32
bnx2i_alloc_iscsi_cid(struct bnx2i_hba
*hba
)
277 if (!hba
->cid_que
.cid_free_cnt
)
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;
285 hba
->cid_que
.cid_free_cnt
--;
286 return hba
->cid_que
.cid_que
[idx
];
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
295 static void bnx2i_free_iscsi_cid(struct bnx2i_hba
*hba
, u16 iscsi_cid
)
299 if (iscsi_cid
== (u16
) -1)
302 hba
->cid_que
.cid_free_cnt
++;
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;
314 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
315 * @hba: pointer to adapter instance
317 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
318 * and initialize table attributes
320 static int bnx2i_setup_free_cid_que(struct bnx2i_hba
*hba
)
325 mem_size
= hba
->max_active_conns
* sizeof(u32
);
326 mem_size
= (mem_size
+ (PAGE_SIZE
- 1)) & PAGE_MASK
;
328 hba
->cid_que
.cid_que_base
= kmalloc(mem_size
, GFP_KERNEL
);
329 if (!hba
->cid_que
.cid_que_base
)
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
;
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
;
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
;
356 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
357 * @hba: pointer to adapter instance
359 static void bnx2i_release_free_cid_que(struct bnx2i_hba
*hba
)
361 kfree(hba
->cid_que
.cid_que_base
);
362 hba
->cid_que
.cid_que_base
= NULL
;
364 kfree(hba
->cid_que
.conn_cid_tbl
);
365 hba
->cid_que
.conn_cid_tbl
= NULL
;
370 * bnx2i_alloc_ep - allocates ep structure from global pool
371 * @hba: pointer to adapter instance
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
377 static struct iscsi_endpoint
*bnx2i_alloc_ep(struct bnx2i_hba
*hba
)
379 struct iscsi_endpoint
*ep
;
380 struct bnx2i_endpoint
*bnx2i_ep
;
382 ep
= iscsi_create_endpoint(sizeof(*bnx2i_ep
));
384 printk(KERN_ERR
"bnx2i: Could not allocate ep\n");
388 bnx2i_ep
= ep
->dd_data
;
389 bnx2i_ep
->cls_ep
= ep
;
390 INIT_LIST_HEAD(&bnx2i_ep
->link
);
391 bnx2i_ep
->state
= EP_STATE_IDLE
;
392 bnx2i_ep
->ep_iscsi_cid
= (u16
) -1;
394 bnx2i_ep
->hba_age
= hba
->age
;
395 hba
->ofld_conns_active
++;
396 init_waitqueue_head(&bnx2i_ep
->ofld_wait
);
402 * bnx2i_free_ep - free endpoint
403 * @ep: pointer to iscsi endpoint structure
405 static void bnx2i_free_ep(struct iscsi_endpoint
*ep
)
407 struct bnx2i_endpoint
*bnx2i_ep
= ep
->dd_data
;
410 spin_lock_irqsave(&bnx2i_resc_lock
, flags
);
411 bnx2i_ep
->state
= EP_STATE_IDLE
;
412 bnx2i_ep
->hba
->ofld_conns_active
--;
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
;
420 bnx2i_ep
->hba
= NULL
;
421 spin_unlock_irqrestore(&bnx2i_resc_lock
, flags
);
422 iscsi_destroy_endpoint(ep
);
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
432 static int bnx2i_alloc_bdt(struct bnx2i_hba
*hba
, struct iscsi_session
*session
,
433 struct bnx2i_cmd
*cmd
)
435 struct io_bdt
*io
= &cmd
->io_tbl
;
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
);
442 iscsi_session_printk(KERN_ERR
, session
, "Could not "
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
456 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba
*hba
,
457 struct iscsi_session
*session
)
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
;
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
),
470 cmd
->io_tbl
.bd_tbl_dma
);
477 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
478 * @hba: adapter instance pointer
479 * @session: iscsi session pointer
481 static int bnx2i_setup_cmd_pool(struct bnx2i_hba
*hba
,
482 struct iscsi_session
*session
)
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
;
490 task
->hdr
= &cmd
->hdr
;
491 task
->hdr_max
= sizeof(struct iscsi_hdr
);
493 if (bnx2i_alloc_bdt(hba
, session
, cmd
))
500 bnx2i_destroy_cmd_pool(hba
, session
);
506 * bnx2i_setup_mp_bdt - allocate BD table resources
507 * @hba: pointer to adapter structure
509 * Allocate memory for dummy buffer and associated BD
510 * table to be used by middle path (MP) requests
512 static int bnx2i_setup_mp_bdt(struct bnx2i_hba
*hba
)
515 struct iscsi_bd
*mp_bdt
;
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");
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
;
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
;
550 * bnx2i_free_mp_bdt - releases ITT back to free pool
551 * @hba: pointer to adapter instance
553 * free MP dummy buffer and associated BD table
555 static void bnx2i_free_mp_bdt(struct bnx2i_hba
*hba
)
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
;
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
;
571 * bnx2i_drop_session - notifies iscsid of connection error.
572 * @hba: adapter instance pointer
573 * @session: iscsi session pointer
575 * This notifies iscsid that there is a error, so it can initiate
578 * This relies on caller using the iscsi class iterator so the object
579 * is refcounted and does not disapper from under us.
581 void bnx2i_drop_session(struct iscsi_cls_session
*cls_session
)
583 iscsi_session_failure(cls_session
->dd_data
, ISCSI_ERR_CONN_FAILED
);
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
591 * EP destroy queue manager
593 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba
*hba
,
594 struct bnx2i_endpoint
*ep
)
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
);
603 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
605 * @hba: pointer to adapter instance
606 * @ep: pointer to endpoint (transport indentifier) structure
608 * EP destroy queue manager
610 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba
*hba
,
611 struct bnx2i_endpoint
*ep
)
613 write_lock_bh(&hba
->ep_rdwr_lock
);
614 list_del_init(&ep
->link
);
615 write_unlock_bh(&hba
->ep_rdwr_lock
);
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
625 * pending conn offload completion queue manager
627 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba
*hba
,
628 struct bnx2i_endpoint
*ep
)
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
);
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
641 * pending conn offload completion queue manager
643 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba
*hba
,
644 struct bnx2i_endpoint
*ep
)
646 write_lock_bh(&hba
->ep_rdwr_lock
);
647 list_del_init(&ep
->link
);
648 write_unlock_bh(&hba
->ep_rdwr_lock
);
654 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
656 * @hba: pointer to adapter instance
657 * @iscsi_cid: iscsi context ID to find
660 struct bnx2i_endpoint
*
661 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba
*hba
, u32 iscsi_cid
)
663 struct list_head
*list
;
664 struct list_head
*tmp
;
665 struct bnx2i_endpoint
*ep
;
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
;
671 if (ep
->ep_iscsi_cid
== iscsi_cid
)
675 read_unlock_bh(&hba
->ep_rdwr_lock
);
678 printk(KERN_ERR
"l5 cid %d not found\n", iscsi_cid
);
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
688 struct bnx2i_endpoint
*
689 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba
*hba
, u32 iscsi_cid
)
691 struct list_head
*list
;
692 struct list_head
*tmp
;
693 struct bnx2i_endpoint
*ep
;
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
;
699 if (ep
->ep_iscsi_cid
== iscsi_cid
)
703 read_unlock_bh(&hba
->ep_rdwr_lock
);
706 printk(KERN_ERR
"l5 cid %d not found\n", iscsi_cid
);
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
716 * current active conn queue manager
718 static void bnx2i_ep_active_list_add(struct bnx2i_hba
*hba
,
719 struct bnx2i_endpoint
*ep
)
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
);
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
732 * current active conn queue manager
734 static void bnx2i_ep_active_list_del(struct bnx2i_hba
*hba
,
735 struct bnx2i_endpoint
*ep
)
737 write_lock_bh(&hba
->ep_rdwr_lock
);
738 list_del_init(&ep
->link
);
739 write_unlock_bh(&hba
->ep_rdwr_lock
);
744 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
745 * @hba: pointer to adapter instance
746 * @shost: scsi host pointer
748 * Initializes 'can_queue' parameter based on how many outstanding commands
749 * the device can handle. Each device 5708/5709/57710 has different
752 static void bnx2i_setup_host_queue_size(struct bnx2i_hba
*hba
,
753 struct Scsi_Host
*shost
)
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
;
762 shost
->can_queue
= ISCSI_MAX_CMDS_PER_HBA_5708
;
767 * bnx2i_alloc_hba - allocate and init adapter instance
768 * @cnic: cnic device pointer
770 * allocate & initialize adapter structure and call other
771 * support routines to do per adapter initialization
773 struct bnx2i_hba
*bnx2i_alloc_hba(struct cnic_dev
*cnic
)
775 struct Scsi_Host
*shost
;
776 struct bnx2i_hba
*hba
;
778 shost
= iscsi_host_alloc(&bnx2i_host_template
, sizeof(*hba
), 0);
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;
788 hba
= iscsi_host_priv(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
);
801 bnx2i_identify_device(hba
);
802 bnx2i_setup_host_queue_size(hba
, shost
);
804 if (test_bit(BNX2I_NX2_DEV_5709
, &hba
->cnic_dev_type
)) {
805 hba
->regview
= ioremap_nocache(hba
->netdev
->base_addr
,
809 } else if (test_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
)) {
810 hba
->regview
= ioremap_nocache(hba
->netdev
->base_addr
, 4096);
815 if (bnx2i_setup_mp_bdt(hba
))
818 INIT_LIST_HEAD(&hba
->ep_ofld_list
);
819 INIT_LIST_HEAD(&hba
->ep_active_list
);
820 INIT_LIST_HEAD(&hba
->ep_destroy_list
);
821 rwlock_init(&hba
->ep_rdwr_lock
);
823 hba
->mtu_supported
= BNX2I_MAX_MTU_SUPPORTED
;
825 /* different values for 5708/5709/57710 */
826 hba
->max_active_conns
= ISCSI_MAX_CONNS_PER_HBA
;
828 if (bnx2i_setup_free_cid_que(hba
))
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
;
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
;
841 hba
->max_sqes
= BNX2I_570X_SQ_WQES_DEFAULT
;
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
;
852 hba
->num_ccell
= hba
->max_sqes
/ 2;
854 spin_lock_init(&hba
->lock
);
855 mutex_init(&hba
->net_dev_lock
);
856 init_waitqueue_head(&hba
->eh_wait
);
857 if (test_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
)) {
858 hba
->hba_shutdown_tmo
= 20 * HZ
;
859 hba
->conn_teardown_tmo
= 20 * HZ
;
860 hba
->conn_ctx_destroy_tmo
= 6 * HZ
;
861 } else { /* 5706/5708/5709 */
862 hba
->hba_shutdown_tmo
= 20 * HZ
;
863 hba
->conn_teardown_tmo
= 10 * HZ
;
864 hba
->conn_ctx_destroy_tmo
= 2 * HZ
;
867 if (iscsi_host_add(shost
, &hba
->pcidev
->dev
))
872 bnx2i_release_free_cid_que(hba
);
874 bnx2i_free_mp_bdt(hba
);
877 iounmap(hba
->regview
);
881 pci_dev_put(hba
->pcidev
);
882 scsi_host_put(shost
);
887 * bnx2i_free_hba- releases hba structure and resources held by the adapter
888 * @hba: pointer to adapter instance
890 * free adapter structure and call various cleanup routines.
892 void bnx2i_free_hba(struct bnx2i_hba
*hba
)
894 struct Scsi_Host
*shost
= hba
->shost
;
896 iscsi_host_remove(shost
);
897 INIT_LIST_HEAD(&hba
->ep_ofld_list
);
898 INIT_LIST_HEAD(&hba
->ep_active_list
);
899 INIT_LIST_HEAD(&hba
->ep_destroy_list
);
900 pci_dev_put(hba
->pcidev
);
903 iounmap(hba
->regview
);
906 bnx2i_free_mp_bdt(hba
);
907 bnx2i_release_free_cid_que(hba
);
908 iscsi_host_free(shost
);
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
916 * Login related resources, mostly BDT & payload DMA memory is freed
918 static void bnx2i_conn_free_login_resources(struct bnx2i_hba
*hba
,
919 struct bnx2i_conn
*bnx2i_conn
)
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
;
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
;
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
;
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
;
953 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
954 * @hba: pointer to adapter instance
955 * @bnx2i_conn: iscsi connection pointer
957 * Mgmt task DNA resources are allocated in this routine.
959 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba
*hba
,
960 struct bnx2i_conn
*bnx2i_conn
)
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
,
968 if (bnx2i_conn
->gen_pdu
.req_buf
== NULL
)
969 goto login_req_buf_failure
;
971 bnx2i_conn
->gen_pdu
.req_buf_size
= 0;
972 bnx2i_conn
->gen_pdu
.req_wr_ptr
= bnx2i_conn
->gen_pdu
.req_buf
;
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
,
979 if (bnx2i_conn
->gen_pdu
.resp_buf
== NULL
)
980 goto login_resp_buf_failure
;
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
;
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
;
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
,
995 if (bnx2i_conn
->gen_pdu
.resp_bd_tbl
== NULL
)
996 goto login_resp_bd_tbl_failure
;
1000 login_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
;
1006 login_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
;
1011 login_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
;
1016 login_req_buf_failure
:
1017 iscsi_conn_printk(KERN_ERR
, bnx2i_conn
->cls_conn
->dd_data
,
1018 "login resource alloc failed!!\n");
1025 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1026 * @bnx2i_conn: iscsi connection pointer
1028 * Allocates buffers and BD tables before shipping requests to cnic
1029 * for PDUs prepared by 'iscsid' daemon
1031 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn
*bnx2i_conn
)
1033 struct iscsi_bd
*bd_tbl
;
1035 bd_tbl
= (struct iscsi_bd
*) bnx2i_conn
->gen_pdu
.req_bd_tbl
;
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
;
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
;
1057 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1058 * @task: transport layer task pointer
1060 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1061 * Nop-out and Logout requests flow through this path.
1063 static int bnx2i_iscsi_send_generic_request(struct iscsi_task
*task
)
1065 struct bnx2i_cmd
*cmd
= task
->dd_data
;
1066 struct bnx2i_conn
*bnx2i_conn
= cmd
->conn
;
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
);
1076 case ISCSI_OP_NOOP_OUT
:
1077 data_len
= bnx2i_conn
->gen_pdu
.req_buf_size
;
1078 buf
= bnx2i_conn
->gen_pdu
.req_buf
;
1080 rc
= bnx2i_send_iscsi_nopout(bnx2i_conn
, task
,
1083 rc
= bnx2i_send_iscsi_nopout(bnx2i_conn
, task
,
1086 case ISCSI_OP_LOGOUT
:
1087 rc
= bnx2i_send_iscsi_logout(bnx2i_conn
, task
);
1089 case ISCSI_OP_SCSI_TMFUNC
:
1090 rc
= bnx2i_send_iscsi_tmf(bnx2i_conn
, task
);
1093 iscsi_conn_printk(KERN_ALERT
, bnx2i_conn
->cls_conn
->dd_data
,
1094 "send_gen: unsupported op 0x%x\n",
1101 /**********************************************************************
1103 **********************************************************************/
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
1110 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd
*sc
, struct bnx2i_cmd
*cmd
)
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]);
1122 lpcnt
= cmd
->scsi_cmd
->cmd_len
/ sizeof(dword
);
1123 srcp
= (u8
*) sc
->cmnd
;
1124 dstp
= (u32
*) cmd
->req
.cdb
;
1126 memcpy(&dword
, (const void *) srcp
, 4);
1127 *dstp
= cpu_to_be32(dword
);
1131 if (sc
->cmd_len
& 0x3) {
1132 dword
= (u32
) srcp
[0] | ((u32
) srcp
[1] << 8);
1133 *dstp
= cpu_to_be32(dword
);
1137 static void bnx2i_cleanup_task(struct iscsi_task
*task
)
1139 struct iscsi_conn
*conn
= task
->conn
;
1140 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1141 struct bnx2i_hba
*hba
= bnx2i_conn
->hba
;
1144 * mgmt task or cmd was never sent to us to transmit.
1146 if (!task
->sc
|| task
->state
== ISCSI_TASK_PENDING
)
1149 * need to clean-up task context to claim dma buffers
1151 if (task
->state
== ISCSI_TASK_ABRT_TMF
) {
1152 bnx2i_send_cmd_cleanup_req(hba
, task
->dd_data
);
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
);
1159 bnx2i_iscsi_unmap_sg_list(task
->dd_data
);
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
1168 bnx2i_mtask_xmit(struct iscsi_conn
*conn
, struct iscsi_task
*task
)
1170 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1171 struct bnx2i_cmd
*cmd
= task
->dd_data
;
1173 memset(bnx2i_conn
->gen_pdu
.req_buf
, 0, ISCSI_DEF_MAX_RECV_SEG_LEN
);
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
,
1180 bnx2i_conn
->gen_pdu
.req_wr_ptr
=
1181 bnx2i_conn
->gen_pdu
.req_buf
+ task
->data_count
;
1183 cmd
->conn
= conn
->dd_data
;
1184 cmd
->scsi_cmd
= NULL
;
1185 return bnx2i_iscsi_send_generic_request(task
);
1189 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1190 * @task: transport layer command structure pointer
1192 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1194 static int bnx2i_task_xmit(struct iscsi_task
*task
)
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
;
1206 * If there is no scsi_cmnd this must be a mgmt task
1209 return bnx2i_mtask_xmit(conn
, task
);
1211 bnx2i_setup_cmd_wqe_template(cmd
);
1212 cmd
->req
.op_code
= ISCSI_OP_SCSI_CMD
;
1213 cmd
->conn
= bnx2i_conn
;
1215 cmd
->req
.total_data_transfer_length
= scsi_bufflen(sc
);
1216 cmd
->req
.cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1218 bnx2i_iscsi_map_sg_list(cmd
);
1219 bnx2i_cpy_scsi_cdb(sc
, cmd
);
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
);
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
);
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;
1241 bnx2i_send_iscsi_scsicmd(bnx2i_conn
, cmd
);
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
1251 * Creates a new iSCSI session instance on given device.
1253 static struct iscsi_cls_session
*
1254 bnx2i_session_create(struct iscsi_endpoint
*ep
,
1255 uint16_t cmds_max
, uint16_t qdepth
,
1256 uint32_t initial_cmdsn
)
1258 struct Scsi_Host
*shost
;
1259 struct iscsi_cls_session
*cls_session
;
1260 struct bnx2i_hba
*hba
;
1261 struct bnx2i_endpoint
*bnx2i_ep
;
1264 printk(KERN_ERR
"bnx2i: missing ep.\n");
1268 bnx2i_ep
= ep
->dd_data
;
1269 shost
= bnx2i_ep
->hba
->shost
;
1270 hba
= iscsi_host_priv(shost
);
1271 if (bnx2i_adapter_ready(hba
))
1275 * user can override hw limit as long as it is within
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
;
1283 cls_session
= iscsi_session_setup(&bnx2i_iscsi_transport
, shost
,
1284 cmds_max
, 0, sizeof(struct bnx2i_cmd
),
1285 initial_cmdsn
, ISCSI_MAX_TARGET
);
1289 if (bnx2i_setup_cmd_pool(hba
, cls_session
->dd_data
))
1290 goto session_teardown
;
1294 iscsi_session_teardown(cls_session
);
1300 * bnx2i_session_destroy - destroys iscsi session
1301 * @cls_session: pointer to iscsi cls session
1303 * Destroys previously created iSCSI session instance and releases
1304 * all resources held by it
1306 static void bnx2i_session_destroy(struct iscsi_cls_session
*cls_session
)
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
);
1312 bnx2i_destroy_cmd_pool(hba
, session
);
1313 iscsi_session_teardown(cls_session
);
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)
1322 * Creates a new iSCSI connection instance for a given session
1324 static struct iscsi_cls_conn
*
1325 bnx2i_conn_create(struct iscsi_cls_session
*cls_session
, uint32_t cid
)
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
;
1333 cls_conn
= iscsi_conn_setup(cls_session
, sizeof(*bnx2i_conn
),
1337 conn
= cls_conn
->dd_data
;
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
);
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");
1355 iscsi_conn_teardown(cls_conn
);
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?
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
1371 static 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
)
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
;
1383 ep
= iscsi_lookup_endpoint(transport_fd
);
1387 bnx2i_ep
= ep
->dd_data
;
1388 if ((bnx2i_ep
->state
== EP_STATE_TCP_FIN_RCVD
) ||
1389 (bnx2i_ep
->state
== EP_STATE_TCP_RST_RCVD
))
1390 /* Peer disconnect via' FIN or RST */
1393 if (iscsi_conn_bind(cls_session
, cls_conn
, is_leading
))
1396 if (bnx2i_ep
->hba
!= hba
) {
1397 /* Error - TCP connection does not belong to this device
1399 iscsi_conn_printk(KERN_ALERT
, cls_conn
->dd_data
,
1400 "conn bind, ep=0x%p (%s) does not",
1401 bnx2i_ep
, bnx2i_ep
->hba
->netdev
->name
);
1402 iscsi_conn_printk(KERN_ALERT
, cls_conn
->dd_data
,
1403 "belong to hba (%s)\n",
1408 bnx2i_ep
->conn
= bnx2i_conn
;
1409 bnx2i_conn
->ep
= bnx2i_ep
;
1410 bnx2i_conn
->iscsi_conn_cid
= bnx2i_ep
->ep_iscsi_cid
;
1411 bnx2i_conn
->fw_cid
= bnx2i_ep
->ep_cid
;
1413 ret_code
= bnx2i_bind_conn_to_iscsi_cid(hba
, bnx2i_conn
,
1414 bnx2i_ep
->ep_iscsi_cid
);
1416 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1417 * driver needs to explicitly replenish RQ index during setup.
1419 if (test_bit(BNX2I_NX2_DEV_57710
, &bnx2i_ep
->hba
->cnic_dev_type
))
1420 bnx2i_put_rq_buf(bnx2i_conn
, 0);
1422 bnx2i_arm_cq_event_coalescing(bnx2i_conn
->ep
, CNIC_ARM_CQE
);
1428 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1429 * @cls_conn: pointer to iscsi cls conn
1431 * Destroy an iSCSI connection instance and release memory resources held by
1434 static void bnx2i_conn_destroy(struct iscsi_cls_conn
*cls_conn
)
1436 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
1437 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1438 struct Scsi_Host
*shost
;
1439 struct bnx2i_hba
*hba
;
1441 shost
= iscsi_session_to_shost(iscsi_conn_to_session(cls_conn
));
1442 hba
= iscsi_host_priv(shost
);
1444 bnx2i_conn_free_login_resources(hba
, bnx2i_conn
);
1445 iscsi_conn_teardown(cls_conn
);
1450 * bnx2i_conn_get_param - return iscsi connection parameter to caller
1451 * @cls_conn: pointer to iscsi cls conn
1452 * @param: parameter type identifier
1453 * @buf: buffer pointer
1455 * returns iSCSI connection parameters
1457 static int bnx2i_conn_get_param(struct iscsi_cls_conn
*cls_conn
,
1458 enum iscsi_param param
, char *buf
)
1460 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
1461 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1465 case ISCSI_PARAM_CONN_PORT
:
1467 len
= sprintf(buf
, "%hu\n",
1468 bnx2i_conn
->ep
->cm_sk
->dst_port
);
1470 case ISCSI_PARAM_CONN_ADDRESS
:
1472 len
= sprintf(buf
, "%pI4\n",
1473 &bnx2i_conn
->ep
->cm_sk
->dst_ip
);
1476 return iscsi_conn_get_param(cls_conn
, param
, buf
);
1483 * bnx2i_host_get_param - returns host (adapter) related parameters
1484 * @shost: scsi host pointer
1485 * @param: parameter type identifier
1486 * @buf: buffer pointer
1488 static int bnx2i_host_get_param(struct Scsi_Host
*shost
,
1489 enum iscsi_host_param param
, char *buf
)
1491 struct bnx2i_hba
*hba
= iscsi_host_priv(shost
);
1495 case ISCSI_HOST_PARAM_HWADDRESS
:
1496 len
= sysfs_format_mac(buf
, hba
->cnic
->mac_addr
, 6);
1498 case ISCSI_HOST_PARAM_NETDEV_NAME
:
1499 len
= sprintf(buf
, "%s\n", hba
->netdev
->name
);
1501 case ISCSI_HOST_PARAM_IPADDRESS
: {
1502 struct list_head
*active_list
= &hba
->ep_active_list
;
1504 read_lock_bh(&hba
->ep_rdwr_lock
);
1505 if (!list_empty(&hba
->ep_active_list
)) {
1506 struct bnx2i_endpoint
*bnx2i_ep
;
1507 struct cnic_sock
*csk
;
1509 bnx2i_ep
= list_first_entry(active_list
,
1510 struct bnx2i_endpoint
,
1512 csk
= bnx2i_ep
->cm_sk
;
1513 if (test_bit(SK_F_IPV6
, &csk
->flags
))
1514 len
= sprintf(buf
, "%pI6\n", csk
->src_ip
);
1516 len
= sprintf(buf
, "%pI4\n", csk
->src_ip
);
1518 read_unlock_bh(&hba
->ep_rdwr_lock
);
1522 return iscsi_host_get_param(shost
, param
, buf
);
1528 * bnx2i_conn_start - completes iscsi connection migration to FFP
1529 * @cls_conn: pointer to iscsi cls conn
1531 * last call in FFP migration to handover iscsi conn to the driver
1533 static int bnx2i_conn_start(struct iscsi_cls_conn
*cls_conn
)
1535 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
1536 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1538 bnx2i_conn
->ep
->state
= EP_STATE_ULP_UPDATE_START
;
1539 bnx2i_update_iscsi_conn(conn
);
1542 * this should normally not sleep for a long time so it should
1543 * not disrupt the caller.
1545 bnx2i_conn
->ep
->ofld_timer
.expires
= 1 * HZ
+ jiffies
;
1546 bnx2i_conn
->ep
->ofld_timer
.function
= bnx2i_ep_ofld_timer
;
1547 bnx2i_conn
->ep
->ofld_timer
.data
= (unsigned long) bnx2i_conn
->ep
;
1548 add_timer(&bnx2i_conn
->ep
->ofld_timer
);
1549 /* update iSCSI context for this conn, wait for CNIC to complete */
1550 wait_event_interruptible(bnx2i_conn
->ep
->ofld_wait
,
1551 bnx2i_conn
->ep
->state
!= EP_STATE_ULP_UPDATE_START
);
1553 if (signal_pending(current
))
1554 flush_signals(current
);
1555 del_timer_sync(&bnx2i_conn
->ep
->ofld_timer
);
1557 iscsi_conn_start(cls_conn
);
1563 * bnx2i_conn_get_stats - returns iSCSI stats
1564 * @cls_conn: pointer to iscsi cls conn
1565 * @stats: pointer to iscsi statistic struct
1567 static void bnx2i_conn_get_stats(struct iscsi_cls_conn
*cls_conn
,
1568 struct iscsi_stats
*stats
)
1570 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
1572 stats
->txdata_octets
= conn
->txdata_octets
;
1573 stats
->rxdata_octets
= conn
->rxdata_octets
;
1574 stats
->scsicmd_pdus
= conn
->scsicmd_pdus_cnt
;
1575 stats
->dataout_pdus
= conn
->dataout_pdus_cnt
;
1576 stats
->scsirsp_pdus
= conn
->scsirsp_pdus_cnt
;
1577 stats
->datain_pdus
= conn
->datain_pdus_cnt
;
1578 stats
->r2t_pdus
= conn
->r2t_pdus_cnt
;
1579 stats
->tmfcmd_pdus
= conn
->tmfcmd_pdus_cnt
;
1580 stats
->tmfrsp_pdus
= conn
->tmfrsp_pdus_cnt
;
1581 stats
->custom_length
= 3;
1582 strcpy(stats
->custom
[2].desc
, "eh_abort_cnt");
1583 stats
->custom
[2].value
= conn
->eh_abort_cnt
;
1584 stats
->digest_err
= 0;
1585 stats
->timeout_err
= 0;
1586 stats
->custom_length
= 0;
1591 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1592 * @dst_addr: target IP address
1594 * check if route resolves to BNX2 device
1596 static struct bnx2i_hba
*bnx2i_check_route(struct sockaddr
*dst_addr
)
1598 struct sockaddr_in
*desti
= (struct sockaddr_in
*) dst_addr
;
1599 struct bnx2i_hba
*hba
;
1600 struct cnic_dev
*cnic
= NULL
;
1602 bnx2i_reg_dev_all();
1604 hba
= get_adapter_list_head();
1605 if (hba
&& hba
->cnic
)
1606 cnic
= hba
->cnic
->cm_select_dev(desti
, CNIC_ULP_ISCSI
);
1608 printk(KERN_ALERT
"bnx2i: no route,"
1609 "can't connect using cnic\n");
1612 hba
= bnx2i_find_hba_for_cnic(cnic
);
1616 if (bnx2i_adapter_ready(hba
)) {
1617 printk(KERN_ALERT
"bnx2i: check route, hba not found\n");
1620 if (hba
->netdev
->mtu
> hba
->mtu_supported
) {
1621 printk(KERN_ALERT
"bnx2i: %s network i/f mtu is set to %d\n",
1622 hba
->netdev
->name
, hba
->netdev
->mtu
);
1623 printk(KERN_ALERT
"bnx2i: iSCSI HBA can support mtu of %d\n",
1624 hba
->mtu_supported
);
1634 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1635 * @hba: pointer to adapter instance
1636 * @ep: endpoint (transport indentifier) structure
1638 * destroys cm_sock structure and on chip iscsi context
1640 static int bnx2i_tear_down_conn(struct bnx2i_hba
*hba
,
1641 struct bnx2i_endpoint
*ep
)
1643 if (test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
))
1644 hba
->cnic
->cm_destroy(ep
->cm_sk
);
1646 if (test_bit(ADAPTER_STATE_GOING_DOWN
, &ep
->hba
->adapter_state
))
1647 ep
->state
= EP_STATE_DISCONN_COMPL
;
1649 if (test_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
) &&
1650 ep
->state
== EP_STATE_DISCONN_TIMEDOUT
) {
1651 printk(KERN_ALERT
"bnx2i - ERROR - please submit GRC Dump,"
1652 " NW/PCIe trace, driver msgs to developers"
1657 ep
->state
= EP_STATE_CLEANUP_START
;
1658 init_timer(&ep
->ofld_timer
);
1659 ep
->ofld_timer
.expires
= hba
->conn_ctx_destroy_tmo
+ jiffies
;
1660 ep
->ofld_timer
.function
= bnx2i_ep_ofld_timer
;
1661 ep
->ofld_timer
.data
= (unsigned long) ep
;
1662 add_timer(&ep
->ofld_timer
);
1664 bnx2i_ep_destroy_list_add(hba
, ep
);
1666 /* destroy iSCSI context, wait for it to complete */
1667 bnx2i_send_conn_destroy(hba
, ep
);
1668 wait_event_interruptible(ep
->ofld_wait
,
1669 (ep
->state
!= EP_STATE_CLEANUP_START
));
1671 if (signal_pending(current
))
1672 flush_signals(current
);
1673 del_timer_sync(&ep
->ofld_timer
);
1675 bnx2i_ep_destroy_list_del(hba
, ep
);
1677 if (ep
->state
!= EP_STATE_CLEANUP_CMPL
)
1678 /* should never happen */
1679 printk(KERN_ALERT
"bnx2i - conn destroy failed\n");
1686 * bnx2i_ep_connect - establish TCP connection to target portal
1688 * @dst_addr: target IP address
1689 * @non_blocking: blocking or non-blocking call
1691 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1692 * with l5_core and the CNIC. This is a multi-step process of resolving
1693 * route to target, create a iscsi connection context, handshaking with
1694 * CNIC module to create/initialize the socket struct and finally
1695 * sending down option-2 request to complete TCP 3-way handshake
1697 static struct iscsi_endpoint
*bnx2i_ep_connect(struct Scsi_Host
*shost
,
1698 struct sockaddr
*dst_addr
,
1701 u32 iscsi_cid
= BNX2I_CID_RESERVED
;
1702 struct sockaddr_in
*desti
= (struct sockaddr_in
*) dst_addr
;
1703 struct sockaddr_in6
*desti6
;
1704 struct bnx2i_endpoint
*bnx2i_ep
;
1705 struct bnx2i_hba
*hba
;
1706 struct cnic_dev
*cnic
;
1707 struct cnic_sockaddr saddr
;
1708 struct iscsi_endpoint
*ep
;
1712 /* driver is given scsi host to work with */
1713 hba
= iscsi_host_priv(shost
);
1714 /* Register the device with cnic if not already done so */
1715 bnx2i_register_device(hba
);
1718 * check if the given destination can be reached through
1719 * a iscsi capable NetXtreme2 device
1721 hba
= bnx2i_check_route(dst_addr
);
1723 if (!hba
|| test_bit(ADAPTER_STATE_GOING_DOWN
, &hba
->adapter_state
)) {
1729 mutex_lock(&hba
->net_dev_lock
);
1730 ep
= bnx2i_alloc_ep(hba
);
1735 bnx2i_ep
= ep
->dd_data
;
1737 if (bnx2i_adapter_ready(hba
)) {
1742 bnx2i_ep
->num_active_cmds
= 0;
1743 iscsi_cid
= bnx2i_alloc_iscsi_cid(hba
);
1744 if (iscsi_cid
== -1) {
1745 printk(KERN_ALERT
"alloc_ep: unable to allocate iscsi cid\n");
1749 bnx2i_ep
->hba_age
= hba
->age
;
1751 rc
= bnx2i_alloc_qp_resc(hba
, bnx2i_ep
);
1753 printk(KERN_ALERT
"bnx2i: ep_conn, alloc QP resc error\n");
1758 bnx2i_ep
->ep_iscsi_cid
= (u16
)iscsi_cid
;
1759 bnx2i_ep
->state
= EP_STATE_OFLD_START
;
1760 bnx2i_ep_ofld_list_add(hba
, bnx2i_ep
);
1762 init_timer(&bnx2i_ep
->ofld_timer
);
1763 bnx2i_ep
->ofld_timer
.expires
= 2 * HZ
+ jiffies
;
1764 bnx2i_ep
->ofld_timer
.function
= bnx2i_ep_ofld_timer
;
1765 bnx2i_ep
->ofld_timer
.data
= (unsigned long) bnx2i_ep
;
1766 add_timer(&bnx2i_ep
->ofld_timer
);
1768 bnx2i_send_conn_ofld_req(hba
, bnx2i_ep
);
1770 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1771 wait_event_interruptible(bnx2i_ep
->ofld_wait
,
1772 bnx2i_ep
->state
!= EP_STATE_OFLD_START
);
1774 if (signal_pending(current
))
1775 flush_signals(current
);
1776 del_timer_sync(&bnx2i_ep
->ofld_timer
);
1778 bnx2i_ep_ofld_list_del(hba
, bnx2i_ep
);
1780 if (bnx2i_ep
->state
!= EP_STATE_OFLD_COMPL
) {
1785 rc
= cnic
->cm_create(cnic
, CNIC_ULP_ISCSI
, bnx2i_ep
->ep_cid
,
1786 iscsi_cid
, &bnx2i_ep
->cm_sk
, bnx2i_ep
);
1792 bnx2i_ep
->cm_sk
->rcv_buf
= 256 * 1024;
1793 bnx2i_ep
->cm_sk
->snd_buf
= 256 * 1024;
1794 clear_bit(SK_TCP_TIMESTAMP
, &bnx2i_ep
->cm_sk
->tcp_flags
);
1796 memset(&saddr
, 0, sizeof(saddr
));
1797 if (dst_addr
->sa_family
== AF_INET
) {
1798 desti
= (struct sockaddr_in
*) dst_addr
;
1799 saddr
.remote
.v4
= *desti
;
1800 saddr
.local
.v4
.sin_family
= desti
->sin_family
;
1801 } else if (dst_addr
->sa_family
== AF_INET6
) {
1802 desti6
= (struct sockaddr_in6
*) dst_addr
;
1803 saddr
.remote
.v6
= *desti6
;
1804 saddr
.local
.v6
.sin6_family
= desti6
->sin6_family
;
1807 bnx2i_ep
->timestamp
= jiffies
;
1808 bnx2i_ep
->state
= EP_STATE_CONNECT_START
;
1809 if (!test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
)) {
1813 rc
= cnic
->cm_connect(bnx2i_ep
->cm_sk
, &saddr
);
1817 bnx2i_ep_active_list_add(hba
, bnx2i_ep
);
1819 if (bnx2i_map_ep_dbell_regs(bnx2i_ep
))
1822 mutex_unlock(&hba
->net_dev_lock
);
1826 bnx2i_ep_active_list_del(hba
, bnx2i_ep
);
1828 if (bnx2i_tear_down_conn(hba
, bnx2i_ep
)) {
1829 mutex_unlock(&hba
->net_dev_lock
);
1835 bnx2i_free_qp_resc(hba
, bnx2i_ep
);
1839 mutex_unlock(&hba
->net_dev_lock
);
1841 bnx2i_unreg_dev_all();
1847 * bnx2i_ep_poll - polls for TCP connection establishement
1848 * @ep: TCP connection (endpoint) handle
1849 * @timeout_ms: timeout value in milli secs
1851 * polls for TCP connect request to complete
1853 static int bnx2i_ep_poll(struct iscsi_endpoint
*ep
, int timeout_ms
)
1855 struct bnx2i_endpoint
*bnx2i_ep
;
1858 bnx2i_ep
= ep
->dd_data
;
1859 if ((bnx2i_ep
->state
== EP_STATE_IDLE
) ||
1860 (bnx2i_ep
->state
== EP_STATE_CONNECT_FAILED
) ||
1861 (bnx2i_ep
->state
== EP_STATE_OFLD_FAILED
))
1863 if (bnx2i_ep
->state
== EP_STATE_CONNECT_COMPL
)
1866 rc
= wait_event_interruptible_timeout(bnx2i_ep
->ofld_wait
,
1867 ((bnx2i_ep
->state
==
1868 EP_STATE_OFLD_FAILED
) ||
1870 EP_STATE_CONNECT_FAILED
) ||
1872 EP_STATE_CONNECT_COMPL
)),
1873 msecs_to_jiffies(timeout_ms
));
1874 if (bnx2i_ep
->state
== EP_STATE_OFLD_FAILED
)
1880 return 0; /* timeout */
1887 * bnx2i_ep_tcp_conn_active - check EP state transition
1888 * @ep: endpoint pointer
1890 * check if underlying TCP connection is active
1892 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint
*bnx2i_ep
)
1895 int cnic_dev_10g
= 0;
1897 if (test_bit(BNX2I_NX2_DEV_57710
, &bnx2i_ep
->hba
->cnic_dev_type
))
1900 switch (bnx2i_ep
->state
) {
1901 case EP_STATE_CONNECT_START
:
1902 case EP_STATE_CLEANUP_FAILED
:
1903 case EP_STATE_OFLD_FAILED
:
1904 case EP_STATE_DISCONN_TIMEDOUT
:
1907 case EP_STATE_CONNECT_COMPL
:
1908 case EP_STATE_ULP_UPDATE_START
:
1909 case EP_STATE_ULP_UPDATE_COMPL
:
1910 case EP_STATE_TCP_FIN_RCVD
:
1911 case EP_STATE_LOGOUT_SENT
:
1912 case EP_STATE_LOGOUT_RESP_RCVD
:
1913 case EP_STATE_ULP_UPDATE_FAILED
:
1916 case EP_STATE_TCP_RST_RCVD
:
1919 case EP_STATE_CONNECT_FAILED
:
1934 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
1935 * @ep: TCP connection (bnx2i endpoint) handle
1937 * executes TCP connection teardown process
1939 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint
*bnx2i_ep
)
1941 struct bnx2i_hba
*hba
= bnx2i_ep
->hba
;
1942 struct cnic_dev
*cnic
;
1943 struct iscsi_session
*session
= NULL
;
1944 struct iscsi_conn
*conn
= NULL
;
1956 if (bnx2i_ep
->state
== EP_STATE_IDLE
)
1959 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep
))
1962 if (bnx2i_ep
->conn
) {
1963 conn
= bnx2i_ep
->conn
->cls_conn
->dd_data
;
1964 session
= conn
->session
;
1967 init_timer(&bnx2i_ep
->ofld_timer
);
1968 bnx2i_ep
->ofld_timer
.expires
= hba
->conn_teardown_tmo
+ jiffies
;
1969 bnx2i_ep
->ofld_timer
.function
= bnx2i_ep_ofld_timer
;
1970 bnx2i_ep
->ofld_timer
.data
= (unsigned long) bnx2i_ep
;
1971 add_timer(&bnx2i_ep
->ofld_timer
);
1973 if (!test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
))
1977 spin_lock_bh(&session
->lock
);
1978 if (bnx2i_ep
->state
!= EP_STATE_TCP_FIN_RCVD
) {
1979 if (session
->state
== ISCSI_STATE_LOGGING_OUT
) {
1980 if (bnx2i_ep
->state
== EP_STATE_LOGOUT_SENT
) {
1981 /* Logout sent, but no resp */
1982 printk(KERN_ALERT
"bnx2i - WARNING "
1983 "logout response was not "
1985 } else if (bnx2i_ep
->state
==
1986 EP_STATE_LOGOUT_RESP_RCVD
)
1992 spin_unlock_bh(&session
->lock
);
1995 bnx2i_ep
->state
= EP_STATE_DISCONN_START
;
1998 close_ret
= cnic
->cm_close(bnx2i_ep
->cm_sk
);
2000 close_ret
= cnic
->cm_abort(bnx2i_ep
->cm_sk
);
2002 /* No longer allow CFC delete if cm_close/abort fails the request */
2004 printk(KERN_ALERT
"bnx2i: %s close/abort(%d) returned %d\n",
2005 bnx2i_ep
->hba
->netdev
->name
, close
, close_ret
);
2007 /* wait for option-2 conn teardown */
2008 wait_event_interruptible(bnx2i_ep
->ofld_wait
,
2009 bnx2i_ep
->state
!= EP_STATE_DISCONN_START
);
2011 if (signal_pending(current
))
2012 flush_signals(current
);
2013 del_timer_sync(&bnx2i_ep
->ofld_timer
);
2016 bnx2i_ep_active_list_del(hba
, bnx2i_ep
);
2017 if (bnx2i_tear_down_conn(hba
, bnx2i_ep
))
2020 bnx2i_ep
->state
= EP_STATE_IDLE
;
2026 * bnx2i_ep_disconnect - executes TCP connection teardown process
2027 * @ep: TCP connection (iscsi endpoint) handle
2029 * executes TCP connection teardown process
2031 static void bnx2i_ep_disconnect(struct iscsi_endpoint
*ep
)
2033 struct bnx2i_endpoint
*bnx2i_ep
;
2034 struct bnx2i_conn
*bnx2i_conn
= NULL
;
2035 struct iscsi_conn
*conn
= NULL
;
2036 struct bnx2i_hba
*hba
;
2038 bnx2i_ep
= ep
->dd_data
;
2040 /* driver should not attempt connection cleanup until TCP_CONNECT
2041 * completes either successfully or fails. Timeout is 9-secs, so
2042 * wait for it to complete
2044 while ((bnx2i_ep
->state
== EP_STATE_CONNECT_START
) &&
2045 !time_after(jiffies
, bnx2i_ep
->timestamp
+ (12 * HZ
)))
2048 if (bnx2i_ep
->conn
) {
2049 bnx2i_conn
= bnx2i_ep
->conn
;
2050 conn
= bnx2i_conn
->cls_conn
->dd_data
;
2051 iscsi_suspend_queue(conn
);
2053 hba
= bnx2i_ep
->hba
;
2055 mutex_lock(&hba
->net_dev_lock
);
2057 if (bnx2i_ep
->state
== EP_STATE_IDLE
)
2058 goto return_bnx2i_ep
;
2060 if (!test_bit(ADAPTER_STATE_UP
, &hba
->adapter_state
))
2063 if (bnx2i_ep
->hba_age
!= hba
->age
)
2066 /* Do all chip cleanup here */
2067 if (bnx2i_hw_ep_disconnect(bnx2i_ep
)) {
2068 mutex_unlock(&hba
->net_dev_lock
);
2072 bnx2i_free_qp_resc(hba
, bnx2i_ep
);
2075 bnx2i_conn
->ep
= NULL
;
2078 mutex_unlock(&hba
->net_dev_lock
);
2079 if (!hba
->ofld_conns_active
)
2080 bnx2i_unreg_dev_all();
2082 wake_up_interruptible(&hba
->eh_wait
);
2087 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2088 * @buf: pointer to buffer containing iscsi path message
2091 static int bnx2i_nl_set_path(struct Scsi_Host
*shost
, struct iscsi_path
*params
)
2093 struct bnx2i_hba
*hba
= iscsi_host_priv(shost
);
2094 char *buf
= (char *) params
;
2095 u16 len
= sizeof(*params
);
2097 /* handled by cnic driver */
2098 hba
->cnic
->iscsi_nl_msg_recv(hba
->cnic
, ISCSI_UEVENT_PATH_UPDATE
, buf
,
2106 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2107 * used while registering with the scsi host and iSCSI transport module.
2109 static struct scsi_host_template bnx2i_host_template
= {
2110 .module
= THIS_MODULE
,
2111 .name
= "Broadcom Offload iSCSI Initiator",
2112 .proc_name
= "bnx2i",
2113 .queuecommand
= iscsi_queuecommand
,
2114 .eh_abort_handler
= iscsi_eh_abort
,
2115 .eh_device_reset_handler
= iscsi_eh_device_reset
,
2116 .eh_target_reset_handler
= iscsi_eh_recover_target
,
2117 .change_queue_depth
= iscsi_change_queue_depth
,
2122 .use_clustering
= ENABLE_CLUSTERING
,
2123 .sg_tablesize
= ISCSI_MAX_BDS_PER_CMD
,
2124 .shost_attrs
= bnx2i_dev_attributes
,
2127 struct iscsi_transport bnx2i_iscsi_transport
= {
2128 .owner
= THIS_MODULE
,
2130 .caps
= CAP_RECOVERY_L0
| CAP_HDRDGST
|
2131 CAP_MULTI_R2T
| CAP_DATADGST
|
2132 CAP_DATA_PATH_OFFLOAD
,
2133 .param_mask
= ISCSI_MAX_RECV_DLENGTH
|
2134 ISCSI_MAX_XMIT_DLENGTH
|
2137 ISCSI_INITIAL_R2T_EN
|
2142 ISCSI_PDU_INORDER_EN
|
2143 ISCSI_DATASEQ_INORDER_EN
|
2146 ISCSI_CONN_ADDRESS
|
2148 ISCSI_PERSISTENT_PORT
|
2149 ISCSI_PERSISTENT_ADDRESS
|
2150 ISCSI_TARGET_NAME
| ISCSI_TPGT
|
2151 ISCSI_USERNAME
| ISCSI_PASSWORD
|
2152 ISCSI_USERNAME_IN
| ISCSI_PASSWORD_IN
|
2153 ISCSI_FAST_ABORT
| ISCSI_ABORT_TMO
|
2154 ISCSI_LU_RESET_TMO
| ISCSI_TGT_RESET_TMO
|
2155 ISCSI_PING_TMO
| ISCSI_RECV_TMO
|
2156 ISCSI_IFACE_NAME
| ISCSI_INITIATOR_NAME
,
2157 .host_param_mask
= ISCSI_HOST_HWADDRESS
| ISCSI_HOST_IPADDRESS
|
2158 ISCSI_HOST_NETDEV_NAME
,
2159 .create_session
= bnx2i_session_create
,
2160 .destroy_session
= bnx2i_session_destroy
,
2161 .create_conn
= bnx2i_conn_create
,
2162 .bind_conn
= bnx2i_conn_bind
,
2163 .destroy_conn
= bnx2i_conn_destroy
,
2164 .set_param
= iscsi_set_param
,
2165 .get_conn_param
= bnx2i_conn_get_param
,
2166 .get_session_param
= iscsi_session_get_param
,
2167 .get_host_param
= bnx2i_host_get_param
,
2168 .start_conn
= bnx2i_conn_start
,
2169 .stop_conn
= iscsi_conn_stop
,
2170 .send_pdu
= iscsi_conn_send_pdu
,
2171 .xmit_task
= bnx2i_task_xmit
,
2172 .get_stats
= bnx2i_conn_get_stats
,
2173 /* TCP connect - disconnect - option-2 interface calls */
2174 .ep_connect
= bnx2i_ep_connect
,
2175 .ep_poll
= bnx2i_ep_poll
,
2176 .ep_disconnect
= bnx2i_ep_disconnect
,
2177 .set_path
= bnx2i_nl_set_path
,
2178 /* Error recovery timeout call */
2179 .session_recovery_timedout
= iscsi_session_recovery_timedout
,
2180 .cleanup_task
= bnx2i_cleanup_task
,