2 * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver.
4 * Copyright (c) 2006 - 2013 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)
13 * Maintained by: Eddie Wai (eddie.wai@broadcom.com)
16 #include <linux/slab.h>
17 #include <scsi/scsi_tcq.h>
18 #include <scsi/libiscsi.h>
21 struct scsi_transport_template
*bnx2i_scsi_xport_template
;
22 struct iscsi_transport bnx2i_iscsi_transport
;
23 static struct scsi_host_template bnx2i_host_template
;
26 * Global endpoint resource info
28 static DEFINE_SPINLOCK(bnx2i_resc_lock
); /* protects global resources */
30 DECLARE_PER_CPU(struct bnx2i_percpu_s
, bnx2i_percpu
);
32 static int bnx2i_adapter_ready(struct bnx2i_hba
*hba
)
36 if (!hba
|| !test_bit(ADAPTER_STATE_UP
, &hba
->adapter_state
) ||
37 test_bit(ADAPTER_STATE_GOING_DOWN
, &hba
->adapter_state
) ||
38 test_bit(ADAPTER_STATE_LINK_DOWN
, &hba
->adapter_state
))
44 * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks
45 * @cmd: iscsi cmd struct pointer
46 * @buf_off: absolute buffer offset
47 * @start_bd_off: u32 pointer to return the offset within the BD
48 * indicated by 'start_bd_idx' on which 'buf_off' falls
49 * @start_bd_idx: index of the BD on which 'buf_off' falls
51 * identifies & marks various bd info for scsi command's imm data,
52 * unsolicited data and the first solicited data seq.
54 static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd
*cmd
, u32 buf_off
,
55 u32
*start_bd_off
, u32
*start_bd_idx
)
57 struct iscsi_bd
*bd_tbl
= cmd
->io_tbl
.bd_tbl
;
62 while (buf_off
>= (cur_offset
+ bd_tbl
->buffer_length
)) {
63 cur_offset
+= bd_tbl
->buffer_length
;
69 *start_bd_off
= buf_off
- cur_offset
;
70 *start_bd_idx
= cur_bd_idx
;
74 * bnx2i_setup_write_cmd_bd_info - sets up BD various information
75 * @task: transport layer's cmd struct pointer
77 * identifies & marks various bd info for scsi command's immediate data,
78 * unsolicited data and first solicited data seq which includes BD start
79 * index & BD buf off. his function takes into account iscsi parameter such
80 * as immediate data and unsolicited data is support on this connection.
82 static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task
*task
)
84 struct bnx2i_cmd
*cmd
= task
->dd_data
;
87 u32 buffer_offset
= 0;
88 u32 cmd_len
= cmd
->req
.total_data_transfer_length
;
90 /* if ImmediateData is turned off & IntialR2T is turned on,
91 * there will be no immediate or unsolicited data, just return.
93 if (!iscsi_task_has_unsol_data(task
) && !task
->imm_count
)
97 buffer_offset
+= task
->imm_count
;
98 if (task
->imm_count
== cmd_len
)
101 if (iscsi_task_has_unsol_data(task
)) {
102 bnx2i_get_write_cmd_bd_idx(cmd
, buffer_offset
,
103 &start_bd_offset
, &start_bd_idx
);
104 cmd
->req
.ud_buffer_offset
= start_bd_offset
;
105 cmd
->req
.ud_start_bd_index
= start_bd_idx
;
106 buffer_offset
+= task
->unsol_r2t
.data_length
;
109 if (buffer_offset
!= cmd_len
) {
110 bnx2i_get_write_cmd_bd_idx(cmd
, buffer_offset
,
111 &start_bd_offset
, &start_bd_idx
);
112 if ((start_bd_offset
> task
->conn
->session
->first_burst
) ||
113 (start_bd_idx
> scsi_sg_count(cmd
->scsi_cmd
))) {
116 iscsi_conn_printk(KERN_ALERT
, task
->conn
,
117 "bnx2i- error, buf offset 0x%x "
118 "bd_valid %d use_sg %d\n",
119 buffer_offset
, cmd
->io_tbl
.bd_valid
,
120 scsi_sg_count(cmd
->scsi_cmd
));
121 for (i
= 0; i
< cmd
->io_tbl
.bd_valid
; i
++)
122 iscsi_conn_printk(KERN_ALERT
, task
->conn
,
123 "bnx2i err, bd[%d]: len %x\n",
124 i
, cmd
->io_tbl
.bd_tbl
[i
].\
127 cmd
->req
.sd_buffer_offset
= start_bd_offset
;
128 cmd
->req
.sd_start_bd_index
= start_bd_idx
;
135 * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table
136 * @hba: adapter instance
137 * @cmd: iscsi cmd struct pointer
141 static int bnx2i_map_scsi_sg(struct bnx2i_hba
*hba
, struct bnx2i_cmd
*cmd
)
143 struct scsi_cmnd
*sc
= cmd
->scsi_cmd
;
144 struct iscsi_bd
*bd
= cmd
->io_tbl
.bd_tbl
;
145 struct scatterlist
*sg
;
153 BUG_ON(scsi_sg_count(sc
) > ISCSI_MAX_BDS_PER_CMD
);
155 sg_count
= scsi_dma_map(sc
);
157 scsi_for_each_sg(sc
, sg
, sg_count
, i
) {
158 sg_len
= sg_dma_len(sg
);
159 addr
= (u64
) sg_dma_address(sg
);
160 bd
[bd_count
].buffer_addr_lo
= addr
& 0xffffffff;
161 bd
[bd_count
].buffer_addr_hi
= addr
>> 32;
162 bd
[bd_count
].buffer_length
= sg_len
;
163 bd
[bd_count
].flags
= 0;
165 bd
[bd_count
].flags
= ISCSI_BD_FIRST_IN_BD_CHAIN
;
167 byte_count
+= sg_len
;
172 bd
[bd_count
- 1].flags
|= ISCSI_BD_LAST_IN_BD_CHAIN
;
174 BUG_ON(byte_count
!= scsi_bufflen(sc
));
179 * bnx2i_iscsi_map_sg_list - maps SG list
180 * @cmd: iscsi cmd struct pointer
182 * creates BD list table for the command
184 static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd
*cmd
)
188 bd_count
= bnx2i_map_scsi_sg(cmd
->conn
->hba
, cmd
);
190 struct iscsi_bd
*bd
= cmd
->io_tbl
.bd_tbl
;
192 bd
[0].buffer_addr_lo
= bd
[0].buffer_addr_hi
= 0;
193 bd
[0].buffer_length
= bd
[0].flags
= 0;
195 cmd
->io_tbl
.bd_valid
= bd_count
;
200 * bnx2i_iscsi_unmap_sg_list - unmaps SG list
201 * @cmd: iscsi cmd struct pointer
203 * unmap IO buffers and invalidate the BD table
205 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd
*cmd
)
207 struct scsi_cmnd
*sc
= cmd
->scsi_cmd
;
209 if (cmd
->io_tbl
.bd_valid
&& sc
) {
211 cmd
->io_tbl
.bd_valid
= 0;
215 static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd
*cmd
)
217 memset(&cmd
->req
, 0x00, sizeof(cmd
->req
));
218 cmd
->req
.op_code
= 0xFF;
219 cmd
->req
.bd_list_addr_lo
= (u32
) cmd
->io_tbl
.bd_tbl_dma
;
220 cmd
->req
.bd_list_addr_hi
=
221 (u32
) ((u64
) cmd
->io_tbl
.bd_tbl_dma
>> 32);
227 * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid'
228 * @hba: pointer to adapter instance
229 * @conn: pointer to iscsi connection
230 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
232 * update iscsi cid table entry with connection pointer. This enables
233 * driver to quickly get hold of connection structure pointer in
234 * completion/interrupt thread using iscsi context ID
236 static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba
*hba
,
237 struct bnx2i_conn
*bnx2i_conn
,
240 if (hba
&& hba
->cid_que
.conn_cid_tbl
[iscsi_cid
]) {
241 iscsi_conn_printk(KERN_ALERT
, bnx2i_conn
->cls_conn
->dd_data
,
242 "conn bind - entry #%d not free\n", iscsi_cid
);
246 hba
->cid_que
.conn_cid_tbl
[iscsi_cid
] = bnx2i_conn
;
252 * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr
253 * @hba: pointer to adapter instance
254 * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1)
256 struct bnx2i_conn
*bnx2i_get_conn_from_id(struct bnx2i_hba
*hba
,
259 if (!hba
->cid_que
.conn_cid_tbl
) {
260 printk(KERN_ERR
"bnx2i: ERROR - missing conn<->cid table\n");
263 } else if (iscsi_cid
>= hba
->max_active_conns
) {
264 printk(KERN_ERR
"bnx2i: wrong cid #%d\n", iscsi_cid
);
267 return hba
->cid_que
.conn_cid_tbl
[iscsi_cid
];
272 * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool
273 * @hba: pointer to adapter instance
275 static u32
bnx2i_alloc_iscsi_cid(struct bnx2i_hba
*hba
)
279 if (!hba
->cid_que
.cid_free_cnt
)
282 idx
= hba
->cid_que
.cid_q_cons_idx
;
283 hba
->cid_que
.cid_q_cons_idx
++;
284 if (hba
->cid_que
.cid_q_cons_idx
== hba
->cid_que
.cid_q_max_idx
)
285 hba
->cid_que
.cid_q_cons_idx
= 0;
287 hba
->cid_que
.cid_free_cnt
--;
288 return hba
->cid_que
.cid_que
[idx
];
293 * bnx2i_free_iscsi_cid - returns tcp port to free list
294 * @hba: pointer to adapter instance
295 * @iscsi_cid: iscsi context ID to free
297 static void bnx2i_free_iscsi_cid(struct bnx2i_hba
*hba
, u16 iscsi_cid
)
301 if (iscsi_cid
== (u16
) -1)
304 hba
->cid_que
.cid_free_cnt
++;
306 idx
= hba
->cid_que
.cid_q_prod_idx
;
307 hba
->cid_que
.cid_que
[idx
] = iscsi_cid
;
308 hba
->cid_que
.conn_cid_tbl
[iscsi_cid
] = NULL
;
309 hba
->cid_que
.cid_q_prod_idx
++;
310 if (hba
->cid_que
.cid_q_prod_idx
== hba
->cid_que
.cid_q_max_idx
)
311 hba
->cid_que
.cid_q_prod_idx
= 0;
316 * bnx2i_setup_free_cid_que - sets up free iscsi cid queue
317 * @hba: pointer to adapter instance
319 * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table,
320 * and initialize table attributes
322 static int bnx2i_setup_free_cid_que(struct bnx2i_hba
*hba
)
327 mem_size
= hba
->max_active_conns
* sizeof(u32
);
328 mem_size
= (mem_size
+ (PAGE_SIZE
- 1)) & PAGE_MASK
;
330 hba
->cid_que
.cid_que_base
= kmalloc(mem_size
, GFP_KERNEL
);
331 if (!hba
->cid_que
.cid_que_base
)
334 mem_size
= hba
->max_active_conns
* sizeof(struct bnx2i_conn
*);
335 mem_size
= (mem_size
+ (PAGE_SIZE
- 1)) & PAGE_MASK
;
336 hba
->cid_que
.conn_cid_tbl
= kmalloc(mem_size
, GFP_KERNEL
);
337 if (!hba
->cid_que
.conn_cid_tbl
) {
338 kfree(hba
->cid_que
.cid_que_base
);
339 hba
->cid_que
.cid_que_base
= NULL
;
343 hba
->cid_que
.cid_que
= (u32
*)hba
->cid_que
.cid_que_base
;
344 hba
->cid_que
.cid_q_prod_idx
= 0;
345 hba
->cid_que
.cid_q_cons_idx
= 0;
346 hba
->cid_que
.cid_q_max_idx
= hba
->max_active_conns
;
347 hba
->cid_que
.cid_free_cnt
= hba
->max_active_conns
;
349 for (i
= 0; i
< hba
->max_active_conns
; i
++) {
350 hba
->cid_que
.cid_que
[i
] = i
;
351 hba
->cid_que
.conn_cid_tbl
[i
] = NULL
;
358 * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources
359 * @hba: pointer to adapter instance
361 static void bnx2i_release_free_cid_que(struct bnx2i_hba
*hba
)
363 kfree(hba
->cid_que
.cid_que_base
);
364 hba
->cid_que
.cid_que_base
= NULL
;
366 kfree(hba
->cid_que
.conn_cid_tbl
);
367 hba
->cid_que
.conn_cid_tbl
= NULL
;
372 * bnx2i_alloc_ep - allocates ep structure from global pool
373 * @hba: pointer to adapter instance
375 * routine allocates a free endpoint structure from global pool and
376 * a tcp port to be used for this connection. Global resource lock,
377 * 'bnx2i_resc_lock' is held while accessing shared global data structures
379 static struct iscsi_endpoint
*bnx2i_alloc_ep(struct bnx2i_hba
*hba
)
381 struct iscsi_endpoint
*ep
;
382 struct bnx2i_endpoint
*bnx2i_ep
;
385 ep
= iscsi_create_endpoint(sizeof(*bnx2i_ep
));
387 printk(KERN_ERR
"bnx2i: Could not allocate ep\n");
391 bnx2i_ep
= ep
->dd_data
;
392 bnx2i_ep
->cls_ep
= ep
;
393 INIT_LIST_HEAD(&bnx2i_ep
->link
);
394 bnx2i_ep
->state
= EP_STATE_IDLE
;
395 bnx2i_ep
->ep_iscsi_cid
= (u16
) -1;
397 bnx2i_ep
->hba_age
= hba
->age
;
399 ec_div
= event_coal_div
;
401 bnx2i_ep
->ec_shift
+= 1;
403 hba
->ofld_conns_active
++;
404 init_waitqueue_head(&bnx2i_ep
->ofld_wait
);
410 * bnx2i_free_ep - free endpoint
411 * @ep: pointer to iscsi endpoint structure
413 static void bnx2i_free_ep(struct iscsi_endpoint
*ep
)
415 struct bnx2i_endpoint
*bnx2i_ep
= ep
->dd_data
;
418 spin_lock_irqsave(&bnx2i_resc_lock
, flags
);
419 bnx2i_ep
->state
= EP_STATE_IDLE
;
420 bnx2i_ep
->hba
->ofld_conns_active
--;
422 if (bnx2i_ep
->ep_iscsi_cid
!= (u16
) -1)
423 bnx2i_free_iscsi_cid(bnx2i_ep
->hba
, bnx2i_ep
->ep_iscsi_cid
);
425 if (bnx2i_ep
->conn
) {
426 bnx2i_ep
->conn
->ep
= NULL
;
427 bnx2i_ep
->conn
= NULL
;
430 bnx2i_ep
->hba
= NULL
;
431 spin_unlock_irqrestore(&bnx2i_resc_lock
, flags
);
432 iscsi_destroy_endpoint(ep
);
437 * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command
438 * @hba: adapter instance pointer
439 * @session: iscsi session pointer
440 * @cmd: iscsi command structure
442 static int bnx2i_alloc_bdt(struct bnx2i_hba
*hba
, struct iscsi_session
*session
,
443 struct bnx2i_cmd
*cmd
)
445 struct io_bdt
*io
= &cmd
->io_tbl
;
448 io
->bd_tbl
= dma_alloc_coherent(&hba
->pcidev
->dev
,
449 ISCSI_MAX_BDS_PER_CMD
* sizeof(*bd
),
450 &io
->bd_tbl_dma
, GFP_KERNEL
);
452 iscsi_session_printk(KERN_ERR
, session
, "Could not "
461 * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table
462 * @hba: adapter instance pointer
463 * @session: iscsi session pointer
464 * @cmd: iscsi command structure
466 static void bnx2i_destroy_cmd_pool(struct bnx2i_hba
*hba
,
467 struct iscsi_session
*session
)
471 for (i
= 0; i
< session
->cmds_max
; i
++) {
472 struct iscsi_task
*task
= session
->cmds
[i
];
473 struct bnx2i_cmd
*cmd
= task
->dd_data
;
475 if (cmd
->io_tbl
.bd_tbl
)
476 dma_free_coherent(&hba
->pcidev
->dev
,
477 ISCSI_MAX_BDS_PER_CMD
*
478 sizeof(struct iscsi_bd
),
480 cmd
->io_tbl
.bd_tbl_dma
);
487 * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session
488 * @hba: adapter instance pointer
489 * @session: iscsi session pointer
491 static int bnx2i_setup_cmd_pool(struct bnx2i_hba
*hba
,
492 struct iscsi_session
*session
)
496 for (i
= 0; i
< session
->cmds_max
; i
++) {
497 struct iscsi_task
*task
= session
->cmds
[i
];
498 struct bnx2i_cmd
*cmd
= task
->dd_data
;
500 task
->hdr
= &cmd
->hdr
;
501 task
->hdr_max
= sizeof(struct iscsi_hdr
);
503 if (bnx2i_alloc_bdt(hba
, session
, cmd
))
510 bnx2i_destroy_cmd_pool(hba
, session
);
516 * bnx2i_setup_mp_bdt - allocate BD table resources
517 * @hba: pointer to adapter structure
519 * Allocate memory for dummy buffer and associated BD
520 * table to be used by middle path (MP) requests
522 static int bnx2i_setup_mp_bdt(struct bnx2i_hba
*hba
)
525 struct iscsi_bd
*mp_bdt
;
528 hba
->mp_bd_tbl
= dma_alloc_coherent(&hba
->pcidev
->dev
, PAGE_SIZE
,
529 &hba
->mp_bd_dma
, GFP_KERNEL
);
530 if (!hba
->mp_bd_tbl
) {
531 printk(KERN_ERR
"unable to allocate Middle Path BDT\n");
536 hba
->dummy_buffer
= dma_alloc_coherent(&hba
->pcidev
->dev
, PAGE_SIZE
,
537 &hba
->dummy_buf_dma
, GFP_KERNEL
);
538 if (!hba
->dummy_buffer
) {
539 printk(KERN_ERR
"unable to alloc Middle Path Dummy Buffer\n");
540 dma_free_coherent(&hba
->pcidev
->dev
, PAGE_SIZE
,
541 hba
->mp_bd_tbl
, hba
->mp_bd_dma
);
542 hba
->mp_bd_tbl
= NULL
;
547 mp_bdt
= (struct iscsi_bd
*) hba
->mp_bd_tbl
;
548 addr
= (unsigned long) hba
->dummy_buf_dma
;
549 mp_bdt
->buffer_addr_lo
= addr
& 0xffffffff;
550 mp_bdt
->buffer_addr_hi
= addr
>> 32;
551 mp_bdt
->buffer_length
= PAGE_SIZE
;
552 mp_bdt
->flags
= ISCSI_BD_LAST_IN_BD_CHAIN
|
553 ISCSI_BD_FIRST_IN_BD_CHAIN
;
560 * bnx2i_free_mp_bdt - releases ITT back to free pool
561 * @hba: pointer to adapter instance
563 * free MP dummy buffer and associated BD table
565 static void bnx2i_free_mp_bdt(struct bnx2i_hba
*hba
)
567 if (hba
->mp_bd_tbl
) {
568 dma_free_coherent(&hba
->pcidev
->dev
, PAGE_SIZE
,
569 hba
->mp_bd_tbl
, hba
->mp_bd_dma
);
570 hba
->mp_bd_tbl
= NULL
;
572 if (hba
->dummy_buffer
) {
573 dma_free_coherent(&hba
->pcidev
->dev
, PAGE_SIZE
,
574 hba
->dummy_buffer
, hba
->dummy_buf_dma
);
575 hba
->dummy_buffer
= NULL
;
581 * bnx2i_drop_session - notifies iscsid of connection error.
582 * @hba: adapter instance pointer
583 * @session: iscsi session pointer
585 * This notifies iscsid that there is a error, so it can initiate
588 * This relies on caller using the iscsi class iterator so the object
589 * is refcounted and does not disapper from under us.
591 void bnx2i_drop_session(struct iscsi_cls_session
*cls_session
)
593 iscsi_session_failure(cls_session
->dd_data
, ISCSI_ERR_CONN_FAILED
);
597 * bnx2i_ep_destroy_list_add - add an entry to EP destroy list
598 * @hba: pointer to adapter instance
599 * @ep: pointer to endpoint (transport indentifier) structure
601 * EP destroy queue manager
603 static int bnx2i_ep_destroy_list_add(struct bnx2i_hba
*hba
,
604 struct bnx2i_endpoint
*ep
)
606 write_lock_bh(&hba
->ep_rdwr_lock
);
607 list_add_tail(&ep
->link
, &hba
->ep_destroy_list
);
608 write_unlock_bh(&hba
->ep_rdwr_lock
);
613 * bnx2i_ep_destroy_list_del - add an entry to EP destroy list
615 * @hba: pointer to adapter instance
616 * @ep: pointer to endpoint (transport indentifier) structure
618 * EP destroy queue manager
620 static int bnx2i_ep_destroy_list_del(struct bnx2i_hba
*hba
,
621 struct bnx2i_endpoint
*ep
)
623 write_lock_bh(&hba
->ep_rdwr_lock
);
624 list_del_init(&ep
->link
);
625 write_unlock_bh(&hba
->ep_rdwr_lock
);
631 * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list
632 * @hba: pointer to adapter instance
633 * @ep: pointer to endpoint (transport indentifier) structure
635 * pending conn offload completion queue manager
637 static int bnx2i_ep_ofld_list_add(struct bnx2i_hba
*hba
,
638 struct bnx2i_endpoint
*ep
)
640 write_lock_bh(&hba
->ep_rdwr_lock
);
641 list_add_tail(&ep
->link
, &hba
->ep_ofld_list
);
642 write_unlock_bh(&hba
->ep_rdwr_lock
);
647 * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list
648 * @hba: pointer to adapter instance
649 * @ep: pointer to endpoint (transport indentifier) structure
651 * pending conn offload completion queue manager
653 static int bnx2i_ep_ofld_list_del(struct bnx2i_hba
*hba
,
654 struct bnx2i_endpoint
*ep
)
656 write_lock_bh(&hba
->ep_rdwr_lock
);
657 list_del_init(&ep
->link
);
658 write_unlock_bh(&hba
->ep_rdwr_lock
);
664 * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints
666 * @hba: pointer to adapter instance
667 * @iscsi_cid: iscsi context ID to find
670 struct bnx2i_endpoint
*
671 bnx2i_find_ep_in_ofld_list(struct bnx2i_hba
*hba
, u32 iscsi_cid
)
673 struct list_head
*list
;
674 struct list_head
*tmp
;
675 struct bnx2i_endpoint
*ep
;
677 read_lock_bh(&hba
->ep_rdwr_lock
);
678 list_for_each_safe(list
, tmp
, &hba
->ep_ofld_list
) {
679 ep
= (struct bnx2i_endpoint
*)list
;
681 if (ep
->ep_iscsi_cid
== iscsi_cid
)
685 read_unlock_bh(&hba
->ep_rdwr_lock
);
688 printk(KERN_ERR
"l5 cid %d not found\n", iscsi_cid
);
693 * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list
694 * @hba: pointer to adapter instance
695 * @iscsi_cid: iscsi context ID to find
698 struct bnx2i_endpoint
*
699 bnx2i_find_ep_in_destroy_list(struct bnx2i_hba
*hba
, u32 iscsi_cid
)
701 struct list_head
*list
;
702 struct list_head
*tmp
;
703 struct bnx2i_endpoint
*ep
;
705 read_lock_bh(&hba
->ep_rdwr_lock
);
706 list_for_each_safe(list
, tmp
, &hba
->ep_destroy_list
) {
707 ep
= (struct bnx2i_endpoint
*)list
;
709 if (ep
->ep_iscsi_cid
== iscsi_cid
)
713 read_unlock_bh(&hba
->ep_rdwr_lock
);
716 printk(KERN_ERR
"l5 cid %d not found\n", iscsi_cid
);
722 * bnx2i_ep_active_list_add - add an entry to ep active list
723 * @hba: pointer to adapter instance
724 * @ep: pointer to endpoint (transport indentifier) structure
726 * current active conn queue manager
728 static void bnx2i_ep_active_list_add(struct bnx2i_hba
*hba
,
729 struct bnx2i_endpoint
*ep
)
731 write_lock_bh(&hba
->ep_rdwr_lock
);
732 list_add_tail(&ep
->link
, &hba
->ep_active_list
);
733 write_unlock_bh(&hba
->ep_rdwr_lock
);
738 * bnx2i_ep_active_list_del - deletes an entry to ep active list
739 * @hba: pointer to adapter instance
740 * @ep: pointer to endpoint (transport indentifier) structure
742 * current active conn queue manager
744 static void bnx2i_ep_active_list_del(struct bnx2i_hba
*hba
,
745 struct bnx2i_endpoint
*ep
)
747 write_lock_bh(&hba
->ep_rdwr_lock
);
748 list_del_init(&ep
->link
);
749 write_unlock_bh(&hba
->ep_rdwr_lock
);
754 * bnx2i_setup_host_queue_size - assigns shost->can_queue param
755 * @hba: pointer to adapter instance
756 * @shost: scsi host pointer
758 * Initializes 'can_queue' parameter based on how many outstanding commands
759 * the device can handle. Each device 5708/5709/57710 has different
762 static void bnx2i_setup_host_queue_size(struct bnx2i_hba
*hba
,
763 struct Scsi_Host
*shost
)
765 if (test_bit(BNX2I_NX2_DEV_5708
, &hba
->cnic_dev_type
))
766 shost
->can_queue
= ISCSI_MAX_CMDS_PER_HBA_5708
;
767 else if (test_bit(BNX2I_NX2_DEV_5709
, &hba
->cnic_dev_type
))
768 shost
->can_queue
= ISCSI_MAX_CMDS_PER_HBA_5709
;
769 else if (test_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
))
770 shost
->can_queue
= ISCSI_MAX_CMDS_PER_HBA_57710
;
772 shost
->can_queue
= ISCSI_MAX_CMDS_PER_HBA_5708
;
777 * bnx2i_alloc_hba - allocate and init adapter instance
778 * @cnic: cnic device pointer
780 * allocate & initialize adapter structure and call other
781 * support routines to do per adapter initialization
783 struct bnx2i_hba
*bnx2i_alloc_hba(struct cnic_dev
*cnic
)
785 struct Scsi_Host
*shost
;
786 struct bnx2i_hba
*hba
;
788 shost
= iscsi_host_alloc(&bnx2i_host_template
, sizeof(*hba
), 0);
791 shost
->dma_boundary
= cnic
->pcidev
->dma_mask
;
792 shost
->transportt
= bnx2i_scsi_xport_template
;
793 shost
->max_id
= ISCSI_MAX_CONNS_PER_HBA
;
794 shost
->max_channel
= 0;
795 shost
->max_lun
= 512;
796 shost
->max_cmd_len
= 16;
798 hba
= iscsi_host_priv(shost
);
800 hba
->netdev
= cnic
->netdev
;
801 /* Get PCI related information and update hba struct members */
802 hba
->pcidev
= cnic
->pcidev
;
803 pci_dev_get(hba
->pcidev
);
804 hba
->pci_did
= hba
->pcidev
->device
;
805 hba
->pci_vid
= hba
->pcidev
->vendor
;
806 hba
->pci_sdid
= hba
->pcidev
->subsystem_device
;
807 hba
->pci_svid
= hba
->pcidev
->subsystem_vendor
;
808 hba
->pci_func
= PCI_FUNC(hba
->pcidev
->devfn
);
809 hba
->pci_devno
= PCI_SLOT(hba
->pcidev
->devfn
);
811 bnx2i_identify_device(hba
, cnic
);
812 bnx2i_setup_host_queue_size(hba
, shost
);
814 hba
->reg_base
= pci_resource_start(hba
->pcidev
, 0);
815 if (test_bit(BNX2I_NX2_DEV_5709
, &hba
->cnic_dev_type
)) {
816 hba
->regview
= pci_iomap(hba
->pcidev
, 0, BNX2_MQ_CONFIG2
);
819 } else if (test_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
)) {
820 hba
->regview
= pci_iomap(hba
->pcidev
, 0, 4096);
825 if (bnx2i_setup_mp_bdt(hba
))
828 INIT_LIST_HEAD(&hba
->ep_ofld_list
);
829 INIT_LIST_HEAD(&hba
->ep_active_list
);
830 INIT_LIST_HEAD(&hba
->ep_destroy_list
);
831 rwlock_init(&hba
->ep_rdwr_lock
);
833 hba
->mtu_supported
= BNX2I_MAX_MTU_SUPPORTED
;
835 /* different values for 5708/5709/57710 */
836 hba
->max_active_conns
= ISCSI_MAX_CONNS_PER_HBA
;
838 if (bnx2i_setup_free_cid_que(hba
))
841 /* SQ/RQ/CQ size can be changed via sysfx interface */
842 if (test_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
)) {
843 if (sq_size
&& sq_size
<= BNX2I_5770X_SQ_WQES_MAX
)
844 hba
->max_sqes
= sq_size
;
846 hba
->max_sqes
= BNX2I_5770X_SQ_WQES_DEFAULT
;
847 } else { /* 5706/5708/5709 */
848 if (sq_size
&& sq_size
<= BNX2I_570X_SQ_WQES_MAX
)
849 hba
->max_sqes
= sq_size
;
851 hba
->max_sqes
= BNX2I_570X_SQ_WQES_DEFAULT
;
854 hba
->max_rqes
= rq_size
;
855 hba
->max_cqes
= hba
->max_sqes
+ rq_size
;
856 if (test_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
)) {
857 if (hba
->max_cqes
> BNX2I_5770X_CQ_WQES_MAX
)
858 hba
->max_cqes
= BNX2I_5770X_CQ_WQES_MAX
;
859 } else if (hba
->max_cqes
> BNX2I_570X_CQ_WQES_MAX
)
860 hba
->max_cqes
= BNX2I_570X_CQ_WQES_MAX
;
862 hba
->num_ccell
= hba
->max_sqes
/ 2;
864 spin_lock_init(&hba
->lock
);
865 mutex_init(&hba
->net_dev_lock
);
866 init_waitqueue_head(&hba
->eh_wait
);
867 if (test_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
)) {
868 hba
->hba_shutdown_tmo
= 30 * HZ
;
869 hba
->conn_teardown_tmo
= 20 * HZ
;
870 hba
->conn_ctx_destroy_tmo
= 6 * HZ
;
871 } else { /* 5706/5708/5709 */
872 hba
->hba_shutdown_tmo
= 20 * HZ
;
873 hba
->conn_teardown_tmo
= 10 * HZ
;
874 hba
->conn_ctx_destroy_tmo
= 2 * HZ
;
878 spin_lock_init(&hba
->stat_lock
);
880 memset(&hba
->stats
, 0, sizeof(struct iscsi_stats_info
));
882 if (iscsi_host_add(shost
, &hba
->pcidev
->dev
))
887 bnx2i_release_free_cid_que(hba
);
889 bnx2i_free_mp_bdt(hba
);
892 pci_iounmap(hba
->pcidev
, hba
->regview
);
896 pci_dev_put(hba
->pcidev
);
897 scsi_host_put(shost
);
902 * bnx2i_free_hba- releases hba structure and resources held by the adapter
903 * @hba: pointer to adapter instance
905 * free adapter structure and call various cleanup routines.
907 void bnx2i_free_hba(struct bnx2i_hba
*hba
)
909 struct Scsi_Host
*shost
= hba
->shost
;
911 iscsi_host_remove(shost
);
912 INIT_LIST_HEAD(&hba
->ep_ofld_list
);
913 INIT_LIST_HEAD(&hba
->ep_active_list
);
914 INIT_LIST_HEAD(&hba
->ep_destroy_list
);
915 pci_dev_put(hba
->pcidev
);
918 pci_iounmap(hba
->pcidev
, hba
->regview
);
921 bnx2i_free_mp_bdt(hba
);
922 bnx2i_release_free_cid_que(hba
);
923 iscsi_host_free(shost
);
927 * bnx2i_conn_free_login_resources - free DMA resources used for login process
928 * @hba: pointer to adapter instance
929 * @bnx2i_conn: iscsi connection pointer
931 * Login related resources, mostly BDT & payload DMA memory is freed
933 static void bnx2i_conn_free_login_resources(struct bnx2i_hba
*hba
,
934 struct bnx2i_conn
*bnx2i_conn
)
936 if (bnx2i_conn
->gen_pdu
.resp_bd_tbl
) {
937 dma_free_coherent(&hba
->pcidev
->dev
, PAGE_SIZE
,
938 bnx2i_conn
->gen_pdu
.resp_bd_tbl
,
939 bnx2i_conn
->gen_pdu
.resp_bd_dma
);
940 bnx2i_conn
->gen_pdu
.resp_bd_tbl
= NULL
;
943 if (bnx2i_conn
->gen_pdu
.req_bd_tbl
) {
944 dma_free_coherent(&hba
->pcidev
->dev
, PAGE_SIZE
,
945 bnx2i_conn
->gen_pdu
.req_bd_tbl
,
946 bnx2i_conn
->gen_pdu
.req_bd_dma
);
947 bnx2i_conn
->gen_pdu
.req_bd_tbl
= NULL
;
950 if (bnx2i_conn
->gen_pdu
.resp_buf
) {
951 dma_free_coherent(&hba
->pcidev
->dev
,
952 ISCSI_DEF_MAX_RECV_SEG_LEN
,
953 bnx2i_conn
->gen_pdu
.resp_buf
,
954 bnx2i_conn
->gen_pdu
.resp_dma_addr
);
955 bnx2i_conn
->gen_pdu
.resp_buf
= NULL
;
958 if (bnx2i_conn
->gen_pdu
.req_buf
) {
959 dma_free_coherent(&hba
->pcidev
->dev
,
960 ISCSI_DEF_MAX_RECV_SEG_LEN
,
961 bnx2i_conn
->gen_pdu
.req_buf
,
962 bnx2i_conn
->gen_pdu
.req_dma_addr
);
963 bnx2i_conn
->gen_pdu
.req_buf
= NULL
;
968 * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop.
969 * @hba: pointer to adapter instance
970 * @bnx2i_conn: iscsi connection pointer
972 * Mgmt task DNA resources are allocated in this routine.
974 static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba
*hba
,
975 struct bnx2i_conn
*bnx2i_conn
)
977 /* Allocate memory for login request/response buffers */
978 bnx2i_conn
->gen_pdu
.req_buf
=
979 dma_alloc_coherent(&hba
->pcidev
->dev
,
980 ISCSI_DEF_MAX_RECV_SEG_LEN
,
981 &bnx2i_conn
->gen_pdu
.req_dma_addr
,
983 if (bnx2i_conn
->gen_pdu
.req_buf
== NULL
)
984 goto login_req_buf_failure
;
986 bnx2i_conn
->gen_pdu
.req_buf_size
= 0;
987 bnx2i_conn
->gen_pdu
.req_wr_ptr
= bnx2i_conn
->gen_pdu
.req_buf
;
989 bnx2i_conn
->gen_pdu
.resp_buf
=
990 dma_alloc_coherent(&hba
->pcidev
->dev
,
991 ISCSI_DEF_MAX_RECV_SEG_LEN
,
992 &bnx2i_conn
->gen_pdu
.resp_dma_addr
,
994 if (bnx2i_conn
->gen_pdu
.resp_buf
== NULL
)
995 goto login_resp_buf_failure
;
997 bnx2i_conn
->gen_pdu
.resp_buf_size
= ISCSI_DEF_MAX_RECV_SEG_LEN
;
998 bnx2i_conn
->gen_pdu
.resp_wr_ptr
= bnx2i_conn
->gen_pdu
.resp_buf
;
1000 bnx2i_conn
->gen_pdu
.req_bd_tbl
=
1001 dma_alloc_coherent(&hba
->pcidev
->dev
, PAGE_SIZE
,
1002 &bnx2i_conn
->gen_pdu
.req_bd_dma
, GFP_KERNEL
);
1003 if (bnx2i_conn
->gen_pdu
.req_bd_tbl
== NULL
)
1004 goto login_req_bd_tbl_failure
;
1006 bnx2i_conn
->gen_pdu
.resp_bd_tbl
=
1007 dma_alloc_coherent(&hba
->pcidev
->dev
, PAGE_SIZE
,
1008 &bnx2i_conn
->gen_pdu
.resp_bd_dma
,
1010 if (bnx2i_conn
->gen_pdu
.resp_bd_tbl
== NULL
)
1011 goto login_resp_bd_tbl_failure
;
1015 login_resp_bd_tbl_failure
:
1016 dma_free_coherent(&hba
->pcidev
->dev
, PAGE_SIZE
,
1017 bnx2i_conn
->gen_pdu
.req_bd_tbl
,
1018 bnx2i_conn
->gen_pdu
.req_bd_dma
);
1019 bnx2i_conn
->gen_pdu
.req_bd_tbl
= NULL
;
1021 login_req_bd_tbl_failure
:
1022 dma_free_coherent(&hba
->pcidev
->dev
, ISCSI_DEF_MAX_RECV_SEG_LEN
,
1023 bnx2i_conn
->gen_pdu
.resp_buf
,
1024 bnx2i_conn
->gen_pdu
.resp_dma_addr
);
1025 bnx2i_conn
->gen_pdu
.resp_buf
= NULL
;
1026 login_resp_buf_failure
:
1027 dma_free_coherent(&hba
->pcidev
->dev
, ISCSI_DEF_MAX_RECV_SEG_LEN
,
1028 bnx2i_conn
->gen_pdu
.req_buf
,
1029 bnx2i_conn
->gen_pdu
.req_dma_addr
);
1030 bnx2i_conn
->gen_pdu
.req_buf
= NULL
;
1031 login_req_buf_failure
:
1032 iscsi_conn_printk(KERN_ERR
, bnx2i_conn
->cls_conn
->dd_data
,
1033 "login resource alloc failed!!\n");
1040 * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table.
1041 * @bnx2i_conn: iscsi connection pointer
1043 * Allocates buffers and BD tables before shipping requests to cnic
1044 * for PDUs prepared by 'iscsid' daemon
1046 static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn
*bnx2i_conn
)
1048 struct iscsi_bd
*bd_tbl
;
1050 bd_tbl
= (struct iscsi_bd
*) bnx2i_conn
->gen_pdu
.req_bd_tbl
;
1052 bd_tbl
->buffer_addr_hi
=
1053 (u32
) ((u64
) bnx2i_conn
->gen_pdu
.req_dma_addr
>> 32);
1054 bd_tbl
->buffer_addr_lo
= (u32
) bnx2i_conn
->gen_pdu
.req_dma_addr
;
1055 bd_tbl
->buffer_length
= bnx2i_conn
->gen_pdu
.req_wr_ptr
-
1056 bnx2i_conn
->gen_pdu
.req_buf
;
1057 bd_tbl
->reserved0
= 0;
1058 bd_tbl
->flags
= ISCSI_BD_LAST_IN_BD_CHAIN
|
1059 ISCSI_BD_FIRST_IN_BD_CHAIN
;
1061 bd_tbl
= (struct iscsi_bd
*) bnx2i_conn
->gen_pdu
.resp_bd_tbl
;
1062 bd_tbl
->buffer_addr_hi
= (u64
) bnx2i_conn
->gen_pdu
.resp_dma_addr
>> 32;
1063 bd_tbl
->buffer_addr_lo
= (u32
) bnx2i_conn
->gen_pdu
.resp_dma_addr
;
1064 bd_tbl
->buffer_length
= ISCSI_DEF_MAX_RECV_SEG_LEN
;
1065 bd_tbl
->reserved0
= 0;
1066 bd_tbl
->flags
= ISCSI_BD_LAST_IN_BD_CHAIN
|
1067 ISCSI_BD_FIRST_IN_BD_CHAIN
;
1072 * bnx2i_iscsi_send_generic_request - called to send mgmt tasks.
1073 * @task: transport layer task pointer
1075 * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login,
1076 * Nop-out and Logout requests flow through this path.
1078 static int bnx2i_iscsi_send_generic_request(struct iscsi_task
*task
)
1080 struct bnx2i_cmd
*cmd
= task
->dd_data
;
1081 struct bnx2i_conn
*bnx2i_conn
= cmd
->conn
;
1086 bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn
);
1087 switch (task
->hdr
->opcode
& ISCSI_OPCODE_MASK
) {
1088 case ISCSI_OP_LOGIN
:
1089 bnx2i_send_iscsi_login(bnx2i_conn
, task
);
1091 case ISCSI_OP_NOOP_OUT
:
1092 data_len
= bnx2i_conn
->gen_pdu
.req_buf_size
;
1093 buf
= bnx2i_conn
->gen_pdu
.req_buf
;
1095 rc
= bnx2i_send_iscsi_nopout(bnx2i_conn
, task
,
1098 rc
= bnx2i_send_iscsi_nopout(bnx2i_conn
, task
,
1101 case ISCSI_OP_LOGOUT
:
1102 rc
= bnx2i_send_iscsi_logout(bnx2i_conn
, task
);
1104 case ISCSI_OP_SCSI_TMFUNC
:
1105 rc
= bnx2i_send_iscsi_tmf(bnx2i_conn
, task
);
1108 rc
= bnx2i_send_iscsi_text(bnx2i_conn
, task
);
1111 iscsi_conn_printk(KERN_ALERT
, bnx2i_conn
->cls_conn
->dd_data
,
1112 "send_gen: unsupported op 0x%x\n",
1119 /**********************************************************************
1121 **********************************************************************/
1124 * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe
1125 * @sc: SCSI-ML command pointer
1126 * @cmd: iscsi cmd pointer
1128 static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd
*sc
, struct bnx2i_cmd
*cmd
)
1136 int_to_scsilun(sc
->device
->lun
, (struct scsi_lun
*) scsi_lun
);
1137 cmd
->req
.lun
[0] = be32_to_cpu(scsi_lun
[0]);
1138 cmd
->req
.lun
[1] = be32_to_cpu(scsi_lun
[1]);
1140 lpcnt
= cmd
->scsi_cmd
->cmd_len
/ sizeof(dword
);
1141 srcp
= (u8
*) sc
->cmnd
;
1142 dstp
= (u32
*) cmd
->req
.cdb
;
1144 memcpy(&dword
, (const void *) srcp
, 4);
1145 *dstp
= cpu_to_be32(dword
);
1149 if (sc
->cmd_len
& 0x3) {
1150 dword
= (u32
) srcp
[0] | ((u32
) srcp
[1] << 8);
1151 *dstp
= cpu_to_be32(dword
);
1155 static void bnx2i_cleanup_task(struct iscsi_task
*task
)
1157 struct iscsi_conn
*conn
= task
->conn
;
1158 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1159 struct bnx2i_hba
*hba
= bnx2i_conn
->hba
;
1162 * mgmt task or cmd was never sent to us to transmit.
1164 if (!task
->sc
|| task
->state
== ISCSI_TASK_PENDING
)
1167 * need to clean-up task context to claim dma buffers
1169 if (task
->state
== ISCSI_TASK_ABRT_TMF
) {
1170 bnx2i_send_cmd_cleanup_req(hba
, task
->dd_data
);
1172 spin_unlock_bh(&conn
->session
->lock
);
1173 wait_for_completion_timeout(&bnx2i_conn
->cmd_cleanup_cmpl
,
1174 msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT
));
1175 spin_lock_bh(&conn
->session
->lock
);
1177 bnx2i_iscsi_unmap_sg_list(task
->dd_data
);
1181 * bnx2i_mtask_xmit - transmit mtask to chip for further processing
1182 * @conn: transport layer conn structure pointer
1183 * @task: transport layer command structure pointer
1186 bnx2i_mtask_xmit(struct iscsi_conn
*conn
, struct iscsi_task
*task
)
1188 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1189 struct bnx2i_hba
*hba
= bnx2i_conn
->hba
;
1190 struct bnx2i_cmd
*cmd
= task
->dd_data
;
1192 memset(bnx2i_conn
->gen_pdu
.req_buf
, 0, ISCSI_DEF_MAX_RECV_SEG_LEN
);
1194 bnx2i_setup_cmd_wqe_template(cmd
);
1195 bnx2i_conn
->gen_pdu
.req_buf_size
= task
->data_count
;
1197 /* Tx PDU/data length count */
1198 ADD_STATS_64(hba
, tx_pdus
, 1);
1199 ADD_STATS_64(hba
, tx_bytes
, task
->data_count
);
1201 if (task
->data_count
) {
1202 memcpy(bnx2i_conn
->gen_pdu
.req_buf
, task
->data
,
1204 bnx2i_conn
->gen_pdu
.req_wr_ptr
=
1205 bnx2i_conn
->gen_pdu
.req_buf
+ task
->data_count
;
1207 cmd
->conn
= conn
->dd_data
;
1208 cmd
->scsi_cmd
= NULL
;
1209 return bnx2i_iscsi_send_generic_request(task
);
1213 * bnx2i_task_xmit - transmit iscsi command to chip for further processing
1214 * @task: transport layer command structure pointer
1216 * maps SG buffers and send request to chip/firmware in the form of SQ WQE
1218 static int bnx2i_task_xmit(struct iscsi_task
*task
)
1220 struct iscsi_conn
*conn
= task
->conn
;
1221 struct iscsi_session
*session
= conn
->session
;
1222 struct Scsi_Host
*shost
= iscsi_session_to_shost(session
->cls_session
);
1223 struct bnx2i_hba
*hba
= iscsi_host_priv(shost
);
1224 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1225 struct scsi_cmnd
*sc
= task
->sc
;
1226 struct bnx2i_cmd
*cmd
= task
->dd_data
;
1227 struct iscsi_scsi_req
*hdr
= (struct iscsi_scsi_req
*)task
->hdr
;
1229 if (atomic_read(&bnx2i_conn
->ep
->num_active_cmds
) + 1 >
1234 * If there is no scsi_cmnd this must be a mgmt task
1237 return bnx2i_mtask_xmit(conn
, task
);
1239 bnx2i_setup_cmd_wqe_template(cmd
);
1240 cmd
->req
.op_code
= ISCSI_OP_SCSI_CMD
;
1241 cmd
->conn
= bnx2i_conn
;
1243 cmd
->req
.total_data_transfer_length
= scsi_bufflen(sc
);
1244 cmd
->req
.cmd_sn
= be32_to_cpu(hdr
->cmdsn
);
1246 bnx2i_iscsi_map_sg_list(cmd
);
1247 bnx2i_cpy_scsi_cdb(sc
, cmd
);
1249 cmd
->req
.op_attr
= ISCSI_ATTR_SIMPLE
;
1250 if (sc
->sc_data_direction
== DMA_TO_DEVICE
) {
1251 cmd
->req
.op_attr
|= ISCSI_CMD_REQUEST_WRITE
;
1252 cmd
->req
.itt
= task
->itt
|
1253 (ISCSI_TASK_TYPE_WRITE
<< ISCSI_CMD_REQUEST_TYPE_SHIFT
);
1254 bnx2i_setup_write_cmd_bd_info(task
);
1256 if (scsi_bufflen(sc
))
1257 cmd
->req
.op_attr
|= ISCSI_CMD_REQUEST_READ
;
1258 cmd
->req
.itt
= task
->itt
|
1259 (ISCSI_TASK_TYPE_READ
<< ISCSI_CMD_REQUEST_TYPE_SHIFT
);
1262 cmd
->req
.num_bds
= cmd
->io_tbl
.bd_valid
;
1263 if (!cmd
->io_tbl
.bd_valid
) {
1264 cmd
->req
.bd_list_addr_lo
= (u32
) hba
->mp_bd_dma
;
1265 cmd
->req
.bd_list_addr_hi
= (u32
) ((u64
) hba
->mp_bd_dma
>> 32);
1266 cmd
->req
.num_bds
= 1;
1269 bnx2i_send_iscsi_scsicmd(bnx2i_conn
, cmd
);
1274 * bnx2i_session_create - create a new iscsi session
1275 * @cmds_max: max commands supported
1276 * @qdepth: scsi queue depth to support
1277 * @initial_cmdsn: initial iscsi CMDSN to be used for this session
1279 * Creates a new iSCSI session instance on given device.
1281 static struct iscsi_cls_session
*
1282 bnx2i_session_create(struct iscsi_endpoint
*ep
,
1283 uint16_t cmds_max
, uint16_t qdepth
,
1284 uint32_t initial_cmdsn
)
1286 struct Scsi_Host
*shost
;
1287 struct iscsi_cls_session
*cls_session
;
1288 struct bnx2i_hba
*hba
;
1289 struct bnx2i_endpoint
*bnx2i_ep
;
1292 printk(KERN_ERR
"bnx2i: missing ep.\n");
1296 bnx2i_ep
= ep
->dd_data
;
1297 shost
= bnx2i_ep
->hba
->shost
;
1298 hba
= iscsi_host_priv(shost
);
1299 if (bnx2i_adapter_ready(hba
))
1303 * user can override hw limit as long as it is within
1306 if (cmds_max
> hba
->max_sqes
)
1307 cmds_max
= hba
->max_sqes
;
1308 else if (cmds_max
< BNX2I_SQ_WQES_MIN
)
1309 cmds_max
= BNX2I_SQ_WQES_MIN
;
1311 cls_session
= iscsi_session_setup(&bnx2i_iscsi_transport
, shost
,
1312 cmds_max
, 0, sizeof(struct bnx2i_cmd
),
1313 initial_cmdsn
, ISCSI_MAX_TARGET
);
1317 if (bnx2i_setup_cmd_pool(hba
, cls_session
->dd_data
))
1318 goto session_teardown
;
1322 iscsi_session_teardown(cls_session
);
1328 * bnx2i_session_destroy - destroys iscsi session
1329 * @cls_session: pointer to iscsi cls session
1331 * Destroys previously created iSCSI session instance and releases
1332 * all resources held by it
1334 static void bnx2i_session_destroy(struct iscsi_cls_session
*cls_session
)
1336 struct iscsi_session
*session
= cls_session
->dd_data
;
1337 struct Scsi_Host
*shost
= iscsi_session_to_shost(cls_session
);
1338 struct bnx2i_hba
*hba
= iscsi_host_priv(shost
);
1340 bnx2i_destroy_cmd_pool(hba
, session
);
1341 iscsi_session_teardown(cls_session
);
1346 * bnx2i_conn_create - create iscsi connection instance
1347 * @cls_session: pointer to iscsi cls session
1348 * @cid: iscsi cid as per rfc (not NX2's CID terminology)
1350 * Creates a new iSCSI connection instance for a given session
1352 static struct iscsi_cls_conn
*
1353 bnx2i_conn_create(struct iscsi_cls_session
*cls_session
, uint32_t cid
)
1355 struct Scsi_Host
*shost
= iscsi_session_to_shost(cls_session
);
1356 struct bnx2i_hba
*hba
= iscsi_host_priv(shost
);
1357 struct bnx2i_conn
*bnx2i_conn
;
1358 struct iscsi_cls_conn
*cls_conn
;
1359 struct iscsi_conn
*conn
;
1361 cls_conn
= iscsi_conn_setup(cls_session
, sizeof(*bnx2i_conn
),
1365 conn
= cls_conn
->dd_data
;
1367 bnx2i_conn
= conn
->dd_data
;
1368 bnx2i_conn
->cls_conn
= cls_conn
;
1369 bnx2i_conn
->hba
= hba
;
1371 atomic_set(&bnx2i_conn
->work_cnt
, 0);
1373 /* 'ep' ptr will be assigned in bind() call */
1374 bnx2i_conn
->ep
= NULL
;
1375 init_completion(&bnx2i_conn
->cmd_cleanup_cmpl
);
1377 if (bnx2i_conn_alloc_login_resources(hba
, bnx2i_conn
)) {
1378 iscsi_conn_printk(KERN_ALERT
, conn
,
1379 "conn_new: login resc alloc failed!!\n");
1386 iscsi_conn_teardown(cls_conn
);
1391 * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together
1392 * @cls_session: pointer to iscsi cls session
1393 * @cls_conn: pointer to iscsi cls conn
1394 * @transport_fd: 64-bit EP handle
1395 * @is_leading: leading connection on this session?
1397 * Binds together iSCSI session instance, iSCSI connection instance
1398 * and the TCP connection. This routine returns error code if
1399 * TCP connection does not belong on the device iSCSI sess/conn
1402 static int bnx2i_conn_bind(struct iscsi_cls_session
*cls_session
,
1403 struct iscsi_cls_conn
*cls_conn
,
1404 uint64_t transport_fd
, int is_leading
)
1406 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
1407 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1408 struct Scsi_Host
*shost
= iscsi_session_to_shost(cls_session
);
1409 struct bnx2i_hba
*hba
= iscsi_host_priv(shost
);
1410 struct bnx2i_endpoint
*bnx2i_ep
;
1411 struct iscsi_endpoint
*ep
;
1414 ep
= iscsi_lookup_endpoint(transport_fd
);
1418 * Forcefully terminate all in progress connection recovery at the
1419 * earliest, either in bind(), send_pdu(LOGIN), or conn_start()
1421 if (bnx2i_adapter_ready(hba
))
1424 bnx2i_ep
= ep
->dd_data
;
1425 if ((bnx2i_ep
->state
== EP_STATE_TCP_FIN_RCVD
) ||
1426 (bnx2i_ep
->state
== EP_STATE_TCP_RST_RCVD
))
1427 /* Peer disconnect via' FIN or RST */
1430 if (iscsi_conn_bind(cls_session
, cls_conn
, is_leading
))
1433 if (bnx2i_ep
->hba
!= hba
) {
1434 /* Error - TCP connection does not belong to this device
1436 iscsi_conn_printk(KERN_ALERT
, cls_conn
->dd_data
,
1437 "conn bind, ep=0x%p (%s) does not",
1438 bnx2i_ep
, bnx2i_ep
->hba
->netdev
->name
);
1439 iscsi_conn_printk(KERN_ALERT
, cls_conn
->dd_data
,
1440 "belong to hba (%s)\n",
1444 bnx2i_ep
->conn
= bnx2i_conn
;
1445 bnx2i_conn
->ep
= bnx2i_ep
;
1446 bnx2i_conn
->iscsi_conn_cid
= bnx2i_ep
->ep_iscsi_cid
;
1447 bnx2i_conn
->fw_cid
= bnx2i_ep
->ep_cid
;
1449 ret_code
= bnx2i_bind_conn_to_iscsi_cid(hba
, bnx2i_conn
,
1450 bnx2i_ep
->ep_iscsi_cid
);
1452 /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710
1453 * driver needs to explicitly replenish RQ index during setup.
1455 if (test_bit(BNX2I_NX2_DEV_57710
, &bnx2i_ep
->hba
->cnic_dev_type
))
1456 bnx2i_put_rq_buf(bnx2i_conn
, 0);
1458 bnx2i_arm_cq_event_coalescing(bnx2i_conn
->ep
, CNIC_ARM_CQE
);
1464 * bnx2i_conn_destroy - destroy iscsi connection instance & release resources
1465 * @cls_conn: pointer to iscsi cls conn
1467 * Destroy an iSCSI connection instance and release memory resources held by
1470 static void bnx2i_conn_destroy(struct iscsi_cls_conn
*cls_conn
)
1472 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
1473 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1474 struct Scsi_Host
*shost
;
1475 struct bnx2i_hba
*hba
;
1476 struct bnx2i_work
*work
, *tmp
;
1478 struct bnx2i_percpu_s
*p
;
1480 shost
= iscsi_session_to_shost(iscsi_conn_to_session(cls_conn
));
1481 hba
= iscsi_host_priv(shost
);
1483 bnx2i_conn_free_login_resources(hba
, bnx2i_conn
);
1485 if (atomic_read(&bnx2i_conn
->work_cnt
)) {
1486 for_each_online_cpu(cpu
) {
1487 p
= &per_cpu(bnx2i_percpu
, cpu
);
1488 spin_lock_bh(&p
->p_work_lock
);
1489 list_for_each_entry_safe(work
, tmp
,
1490 &p
->work_list
, list
) {
1491 if (work
->session
== conn
->session
&&
1492 work
->bnx2i_conn
== bnx2i_conn
) {
1493 list_del_init(&work
->list
);
1495 if (!atomic_dec_and_test(
1496 &bnx2i_conn
->work_cnt
))
1500 spin_unlock_bh(&p
->p_work_lock
);
1504 iscsi_conn_teardown(cls_conn
);
1509 * bnx2i_ep_get_param - return iscsi ep parameter to caller
1510 * @ep: pointer to iscsi endpoint
1511 * @param: parameter type identifier
1512 * @buf: buffer pointer
1514 * returns iSCSI ep parameters
1516 static int bnx2i_ep_get_param(struct iscsi_endpoint
*ep
,
1517 enum iscsi_param param
, char *buf
)
1519 struct bnx2i_endpoint
*bnx2i_ep
= ep
->dd_data
;
1520 struct bnx2i_hba
*hba
= bnx2i_ep
->hba
;
1521 int len
= -ENOTCONN
;
1527 case ISCSI_PARAM_CONN_PORT
:
1528 mutex_lock(&hba
->net_dev_lock
);
1529 if (bnx2i_ep
->cm_sk
)
1530 len
= sprintf(buf
, "%hu\n", bnx2i_ep
->cm_sk
->dst_port
);
1531 mutex_unlock(&hba
->net_dev_lock
);
1533 case ISCSI_PARAM_CONN_ADDRESS
:
1534 mutex_lock(&hba
->net_dev_lock
);
1535 if (bnx2i_ep
->cm_sk
)
1536 len
= sprintf(buf
, "%pI4\n", &bnx2i_ep
->cm_sk
->dst_ip
);
1537 mutex_unlock(&hba
->net_dev_lock
);
1547 * bnx2i_host_get_param - returns host (adapter) related parameters
1548 * @shost: scsi host pointer
1549 * @param: parameter type identifier
1550 * @buf: buffer pointer
1552 static int bnx2i_host_get_param(struct Scsi_Host
*shost
,
1553 enum iscsi_host_param param
, char *buf
)
1555 struct bnx2i_hba
*hba
= iscsi_host_priv(shost
);
1559 case ISCSI_HOST_PARAM_HWADDRESS
:
1560 len
= sysfs_format_mac(buf
, hba
->cnic
->mac_addr
, 6);
1562 case ISCSI_HOST_PARAM_NETDEV_NAME
:
1563 len
= sprintf(buf
, "%s\n", hba
->netdev
->name
);
1565 case ISCSI_HOST_PARAM_IPADDRESS
: {
1566 struct list_head
*active_list
= &hba
->ep_active_list
;
1568 read_lock_bh(&hba
->ep_rdwr_lock
);
1569 if (!list_empty(&hba
->ep_active_list
)) {
1570 struct bnx2i_endpoint
*bnx2i_ep
;
1571 struct cnic_sock
*csk
;
1573 bnx2i_ep
= list_first_entry(active_list
,
1574 struct bnx2i_endpoint
,
1576 csk
= bnx2i_ep
->cm_sk
;
1577 if (test_bit(SK_F_IPV6
, &csk
->flags
))
1578 len
= sprintf(buf
, "%pI6\n", csk
->src_ip
);
1580 len
= sprintf(buf
, "%pI4\n", csk
->src_ip
);
1582 read_unlock_bh(&hba
->ep_rdwr_lock
);
1586 return iscsi_host_get_param(shost
, param
, buf
);
1592 * bnx2i_conn_start - completes iscsi connection migration to FFP
1593 * @cls_conn: pointer to iscsi cls conn
1595 * last call in FFP migration to handover iscsi conn to the driver
1597 static int bnx2i_conn_start(struct iscsi_cls_conn
*cls_conn
)
1599 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
1600 struct bnx2i_conn
*bnx2i_conn
= conn
->dd_data
;
1602 bnx2i_conn
->ep
->state
= EP_STATE_ULP_UPDATE_START
;
1603 bnx2i_update_iscsi_conn(conn
);
1606 * this should normally not sleep for a long time so it should
1607 * not disrupt the caller.
1609 bnx2i_conn
->ep
->ofld_timer
.expires
= 1 * HZ
+ jiffies
;
1610 bnx2i_conn
->ep
->ofld_timer
.function
= bnx2i_ep_ofld_timer
;
1611 bnx2i_conn
->ep
->ofld_timer
.data
= (unsigned long) bnx2i_conn
->ep
;
1612 add_timer(&bnx2i_conn
->ep
->ofld_timer
);
1613 /* update iSCSI context for this conn, wait for CNIC to complete */
1614 wait_event_interruptible(bnx2i_conn
->ep
->ofld_wait
,
1615 bnx2i_conn
->ep
->state
!= EP_STATE_ULP_UPDATE_START
);
1617 if (signal_pending(current
))
1618 flush_signals(current
);
1619 del_timer_sync(&bnx2i_conn
->ep
->ofld_timer
);
1621 iscsi_conn_start(cls_conn
);
1627 * bnx2i_conn_get_stats - returns iSCSI stats
1628 * @cls_conn: pointer to iscsi cls conn
1629 * @stats: pointer to iscsi statistic struct
1631 static void bnx2i_conn_get_stats(struct iscsi_cls_conn
*cls_conn
,
1632 struct iscsi_stats
*stats
)
1634 struct iscsi_conn
*conn
= cls_conn
->dd_data
;
1636 stats
->txdata_octets
= conn
->txdata_octets
;
1637 stats
->rxdata_octets
= conn
->rxdata_octets
;
1638 stats
->scsicmd_pdus
= conn
->scsicmd_pdus_cnt
;
1639 stats
->dataout_pdus
= conn
->dataout_pdus_cnt
;
1640 stats
->scsirsp_pdus
= conn
->scsirsp_pdus_cnt
;
1641 stats
->datain_pdus
= conn
->datain_pdus_cnt
;
1642 stats
->r2t_pdus
= conn
->r2t_pdus_cnt
;
1643 stats
->tmfcmd_pdus
= conn
->tmfcmd_pdus_cnt
;
1644 stats
->tmfrsp_pdus
= conn
->tmfrsp_pdus_cnt
;
1645 stats
->custom_length
= 3;
1646 strcpy(stats
->custom
[2].desc
, "eh_abort_cnt");
1647 stats
->custom
[2].value
= conn
->eh_abort_cnt
;
1648 stats
->digest_err
= 0;
1649 stats
->timeout_err
= 0;
1650 stats
->custom_length
= 0;
1655 * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices
1656 * @dst_addr: target IP address
1658 * check if route resolves to BNX2 device
1660 static struct bnx2i_hba
*bnx2i_check_route(struct sockaddr
*dst_addr
)
1662 struct sockaddr_in
*desti
= (struct sockaddr_in
*) dst_addr
;
1663 struct bnx2i_hba
*hba
;
1664 struct cnic_dev
*cnic
= NULL
;
1666 hba
= get_adapter_list_head();
1667 if (hba
&& hba
->cnic
)
1668 cnic
= hba
->cnic
->cm_select_dev(desti
, CNIC_ULP_ISCSI
);
1670 printk(KERN_ALERT
"bnx2i: no route,"
1671 "can't connect using cnic\n");
1674 hba
= bnx2i_find_hba_for_cnic(cnic
);
1678 if (bnx2i_adapter_ready(hba
)) {
1679 printk(KERN_ALERT
"bnx2i: check route, hba not found\n");
1682 if (hba
->netdev
->mtu
> hba
->mtu_supported
) {
1683 printk(KERN_ALERT
"bnx2i: %s network i/f mtu is set to %d\n",
1684 hba
->netdev
->name
, hba
->netdev
->mtu
);
1685 printk(KERN_ALERT
"bnx2i: iSCSI HBA can support mtu of %d\n",
1686 hba
->mtu_supported
);
1696 * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources
1697 * @hba: pointer to adapter instance
1698 * @ep: endpoint (transport indentifier) structure
1700 * destroys cm_sock structure and on chip iscsi context
1702 static int bnx2i_tear_down_conn(struct bnx2i_hba
*hba
,
1703 struct bnx2i_endpoint
*ep
)
1705 if (test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
) && ep
->cm_sk
)
1706 hba
->cnic
->cm_destroy(ep
->cm_sk
);
1708 if (test_bit(BNX2I_NX2_DEV_57710
, &hba
->cnic_dev_type
) &&
1709 ep
->state
== EP_STATE_DISCONN_TIMEDOUT
) {
1710 if (ep
->conn
&& ep
->conn
->cls_conn
&&
1711 ep
->conn
->cls_conn
->dd_data
) {
1712 struct iscsi_conn
*conn
= ep
->conn
->cls_conn
->dd_data
;
1714 /* Must suspend all rx queue activity for this ep */
1715 set_bit(ISCSI_SUSPEND_BIT
, &conn
->suspend_rx
);
1717 /* CONN_DISCONNECT timeout may or may not be an issue depending
1718 * on what transcribed in TCP layer, different targets behave
1721 printk(KERN_ALERT
"bnx2i (%s): - WARN - CONN_DISCON timed out, "
1722 "please submit GRC Dump, NW/PCIe trace, "
1723 "driver msgs to developers for analysis\n",
1727 ep
->state
= EP_STATE_CLEANUP_START
;
1728 init_timer(&ep
->ofld_timer
);
1729 ep
->ofld_timer
.expires
= hba
->conn_ctx_destroy_tmo
+ jiffies
;
1730 ep
->ofld_timer
.function
= bnx2i_ep_ofld_timer
;
1731 ep
->ofld_timer
.data
= (unsigned long) ep
;
1732 add_timer(&ep
->ofld_timer
);
1734 bnx2i_ep_destroy_list_add(hba
, ep
);
1736 /* destroy iSCSI context, wait for it to complete */
1737 if (bnx2i_send_conn_destroy(hba
, ep
))
1738 ep
->state
= EP_STATE_CLEANUP_CMPL
;
1740 wait_event_interruptible(ep
->ofld_wait
,
1741 (ep
->state
!= EP_STATE_CLEANUP_START
));
1743 if (signal_pending(current
))
1744 flush_signals(current
);
1745 del_timer_sync(&ep
->ofld_timer
);
1747 bnx2i_ep_destroy_list_del(hba
, ep
);
1749 if (ep
->state
!= EP_STATE_CLEANUP_CMPL
)
1750 /* should never happen */
1751 printk(KERN_ALERT
"bnx2i - conn destroy failed\n");
1758 * bnx2i_ep_connect - establish TCP connection to target portal
1760 * @dst_addr: target IP address
1761 * @non_blocking: blocking or non-blocking call
1763 * this routine initiates the TCP/IP connection by invoking Option-2 i/f
1764 * with l5_core and the CNIC. This is a multi-step process of resolving
1765 * route to target, create a iscsi connection context, handshaking with
1766 * CNIC module to create/initialize the socket struct and finally
1767 * sending down option-2 request to complete TCP 3-way handshake
1769 static struct iscsi_endpoint
*bnx2i_ep_connect(struct Scsi_Host
*shost
,
1770 struct sockaddr
*dst_addr
,
1773 u32 iscsi_cid
= BNX2I_CID_RESERVED
;
1774 struct sockaddr_in
*desti
= (struct sockaddr_in
*) dst_addr
;
1775 struct sockaddr_in6
*desti6
;
1776 struct bnx2i_endpoint
*bnx2i_ep
;
1777 struct bnx2i_hba
*hba
;
1778 struct cnic_dev
*cnic
;
1779 struct cnic_sockaddr saddr
;
1780 struct iscsi_endpoint
*ep
;
1784 /* driver is given scsi host to work with */
1785 hba
= iscsi_host_priv(shost
);
1788 * check if the given destination can be reached through
1789 * a iscsi capable NetXtreme2 device
1791 hba
= bnx2i_check_route(dst_addr
);
1797 mutex_lock(&hba
->net_dev_lock
);
1799 if (bnx2i_adapter_ready(hba
) || !hba
->cid_que
.cid_free_cnt
) {
1804 ep
= bnx2i_alloc_ep(hba
);
1809 bnx2i_ep
= ep
->dd_data
;
1811 atomic_set(&bnx2i_ep
->num_active_cmds
, 0);
1812 iscsi_cid
= bnx2i_alloc_iscsi_cid(hba
);
1813 if (iscsi_cid
== -1) {
1814 printk(KERN_ALERT
"bnx2i (%s): alloc_ep - unable to allocate "
1815 "iscsi cid\n", hba
->netdev
->name
);
1820 bnx2i_ep
->hba_age
= hba
->age
;
1822 rc
= bnx2i_alloc_qp_resc(hba
, bnx2i_ep
);
1824 printk(KERN_ALERT
"bnx2i (%s): ep_conn - alloc QP resc error"
1825 "\n", hba
->netdev
->name
);
1830 bnx2i_ep
->ep_iscsi_cid
= (u16
)iscsi_cid
;
1831 bnx2i_ep
->state
= EP_STATE_OFLD_START
;
1832 bnx2i_ep_ofld_list_add(hba
, bnx2i_ep
);
1834 init_timer(&bnx2i_ep
->ofld_timer
);
1835 bnx2i_ep
->ofld_timer
.expires
= 2 * HZ
+ jiffies
;
1836 bnx2i_ep
->ofld_timer
.function
= bnx2i_ep_ofld_timer
;
1837 bnx2i_ep
->ofld_timer
.data
= (unsigned long) bnx2i_ep
;
1838 add_timer(&bnx2i_ep
->ofld_timer
);
1840 if (bnx2i_send_conn_ofld_req(hba
, bnx2i_ep
)) {
1841 if (bnx2i_ep
->state
== EP_STATE_OFLD_FAILED_CID_BUSY
) {
1842 printk(KERN_ALERT
"bnx2i (%s): iscsi cid %d is busy\n",
1843 hba
->netdev
->name
, bnx2i_ep
->ep_iscsi_cid
);
1847 printk(KERN_ALERT
"bnx2i (%s): unable to send conn offld kwqe"
1848 "\n", hba
->netdev
->name
);
1849 bnx2i_ep_ofld_list_del(hba
, bnx2i_ep
);
1853 /* Wait for CNIC hardware to setup conn context and return 'cid' */
1854 wait_event_interruptible(bnx2i_ep
->ofld_wait
,
1855 bnx2i_ep
->state
!= EP_STATE_OFLD_START
);
1857 if (signal_pending(current
))
1858 flush_signals(current
);
1859 del_timer_sync(&bnx2i_ep
->ofld_timer
);
1861 bnx2i_ep_ofld_list_del(hba
, bnx2i_ep
);
1863 if (bnx2i_ep
->state
!= EP_STATE_OFLD_COMPL
) {
1864 if (bnx2i_ep
->state
== EP_STATE_OFLD_FAILED_CID_BUSY
) {
1865 printk(KERN_ALERT
"bnx2i (%s): iscsi cid %d is busy\n",
1866 hba
->netdev
->name
, bnx2i_ep
->ep_iscsi_cid
);
1873 rc
= cnic
->cm_create(cnic
, CNIC_ULP_ISCSI
, bnx2i_ep
->ep_cid
,
1874 iscsi_cid
, &bnx2i_ep
->cm_sk
, bnx2i_ep
);
1877 /* Need to terminate and cleanup the connection */
1881 bnx2i_ep
->cm_sk
->rcv_buf
= 256 * 1024;
1882 bnx2i_ep
->cm_sk
->snd_buf
= 256 * 1024;
1883 clear_bit(SK_TCP_TIMESTAMP
, &bnx2i_ep
->cm_sk
->tcp_flags
);
1885 memset(&saddr
, 0, sizeof(saddr
));
1886 if (dst_addr
->sa_family
== AF_INET
) {
1887 desti
= (struct sockaddr_in
*) dst_addr
;
1888 saddr
.remote
.v4
= *desti
;
1889 saddr
.local
.v4
.sin_family
= desti
->sin_family
;
1890 } else if (dst_addr
->sa_family
== AF_INET6
) {
1891 desti6
= (struct sockaddr_in6
*) dst_addr
;
1892 saddr
.remote
.v6
= *desti6
;
1893 saddr
.local
.v6
.sin6_family
= desti6
->sin6_family
;
1896 bnx2i_ep
->timestamp
= jiffies
;
1897 bnx2i_ep
->state
= EP_STATE_CONNECT_START
;
1898 if (!test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
)) {
1902 rc
= cnic
->cm_connect(bnx2i_ep
->cm_sk
, &saddr
);
1906 bnx2i_ep_active_list_add(hba
, bnx2i_ep
);
1908 if (bnx2i_map_ep_dbell_regs(bnx2i_ep
))
1911 mutex_unlock(&hba
->net_dev_lock
);
1915 bnx2i_ep_active_list_del(hba
, bnx2i_ep
);
1917 if (bnx2i_tear_down_conn(hba
, bnx2i_ep
)) {
1918 mutex_unlock(&hba
->net_dev_lock
);
1922 bnx2i_free_qp_resc(hba
, bnx2i_ep
);
1926 mutex_unlock(&hba
->net_dev_lock
);
1933 * bnx2i_ep_poll - polls for TCP connection establishement
1934 * @ep: TCP connection (endpoint) handle
1935 * @timeout_ms: timeout value in milli secs
1937 * polls for TCP connect request to complete
1939 static int bnx2i_ep_poll(struct iscsi_endpoint
*ep
, int timeout_ms
)
1941 struct bnx2i_endpoint
*bnx2i_ep
;
1944 bnx2i_ep
= ep
->dd_data
;
1945 if ((bnx2i_ep
->state
== EP_STATE_IDLE
) ||
1946 (bnx2i_ep
->state
== EP_STATE_CONNECT_FAILED
) ||
1947 (bnx2i_ep
->state
== EP_STATE_OFLD_FAILED
))
1949 if (bnx2i_ep
->state
== EP_STATE_CONNECT_COMPL
)
1952 rc
= wait_event_interruptible_timeout(bnx2i_ep
->ofld_wait
,
1953 ((bnx2i_ep
->state
==
1954 EP_STATE_OFLD_FAILED
) ||
1956 EP_STATE_CONNECT_FAILED
) ||
1958 EP_STATE_CONNECT_COMPL
)),
1959 msecs_to_jiffies(timeout_ms
));
1960 if (bnx2i_ep
->state
== EP_STATE_OFLD_FAILED
)
1966 return 0; /* timeout */
1973 * bnx2i_ep_tcp_conn_active - check EP state transition
1974 * @ep: endpoint pointer
1976 * check if underlying TCP connection is active
1978 static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint
*bnx2i_ep
)
1981 int cnic_dev_10g
= 0;
1983 if (test_bit(BNX2I_NX2_DEV_57710
, &bnx2i_ep
->hba
->cnic_dev_type
))
1986 switch (bnx2i_ep
->state
) {
1987 case EP_STATE_CLEANUP_FAILED
:
1988 case EP_STATE_OFLD_FAILED
:
1989 case EP_STATE_DISCONN_TIMEDOUT
:
1992 case EP_STATE_CONNECT_START
:
1993 case EP_STATE_CONNECT_FAILED
:
1994 case EP_STATE_CONNECT_COMPL
:
1995 case EP_STATE_ULP_UPDATE_START
:
1996 case EP_STATE_ULP_UPDATE_COMPL
:
1997 case EP_STATE_TCP_FIN_RCVD
:
1998 case EP_STATE_LOGOUT_SENT
:
1999 case EP_STATE_LOGOUT_RESP_RCVD
:
2000 case EP_STATE_ULP_UPDATE_FAILED
:
2003 case EP_STATE_TCP_RST_RCVD
:
2018 * bnx2i_hw_ep_disconnect - executes TCP connection teardown process in the hw
2019 * @ep: TCP connection (bnx2i endpoint) handle
2021 * executes TCP connection teardown process
2023 int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint
*bnx2i_ep
)
2025 struct bnx2i_hba
*hba
= bnx2i_ep
->hba
;
2026 struct cnic_dev
*cnic
;
2027 struct iscsi_session
*session
= NULL
;
2028 struct iscsi_conn
*conn
= NULL
;
2040 if (bnx2i_ep
->state
== EP_STATE_IDLE
||
2041 bnx2i_ep
->state
== EP_STATE_DISCONN_TIMEDOUT
)
2044 if (!bnx2i_ep_tcp_conn_active(bnx2i_ep
))
2047 if (bnx2i_ep
->conn
) {
2048 conn
= bnx2i_ep
->conn
->cls_conn
->dd_data
;
2049 session
= conn
->session
;
2052 init_timer(&bnx2i_ep
->ofld_timer
);
2053 bnx2i_ep
->ofld_timer
.expires
= hba
->conn_teardown_tmo
+ jiffies
;
2054 bnx2i_ep
->ofld_timer
.function
= bnx2i_ep_ofld_timer
;
2055 bnx2i_ep
->ofld_timer
.data
= (unsigned long) bnx2i_ep
;
2056 add_timer(&bnx2i_ep
->ofld_timer
);
2058 if (!test_bit(BNX2I_CNIC_REGISTERED
, &hba
->reg_with_cnic
))
2062 spin_lock_bh(&session
->lock
);
2063 if (bnx2i_ep
->state
!= EP_STATE_TCP_FIN_RCVD
) {
2064 if (session
->state
== ISCSI_STATE_LOGGING_OUT
) {
2065 if (bnx2i_ep
->state
== EP_STATE_LOGOUT_SENT
) {
2066 /* Logout sent, but no resp */
2067 printk(KERN_ALERT
"bnx2i (%s): WARNING"
2068 " logout response was not "
2070 bnx2i_ep
->hba
->netdev
->name
);
2071 } else if (bnx2i_ep
->state
==
2072 EP_STATE_LOGOUT_RESP_RCVD
)
2078 spin_unlock_bh(&session
->lock
);
2081 bnx2i_ep
->state
= EP_STATE_DISCONN_START
;
2084 close_ret
= cnic
->cm_close(bnx2i_ep
->cm_sk
);
2086 close_ret
= cnic
->cm_abort(bnx2i_ep
->cm_sk
);
2089 printk(KERN_ALERT
"bnx2i (%s): close/abort(%d) returned %d\n",
2090 bnx2i_ep
->hba
->netdev
->name
, close
, close_ret
);
2092 /* wait for option-2 conn teardown */
2093 wait_event_interruptible(bnx2i_ep
->ofld_wait
,
2094 bnx2i_ep
->state
!= EP_STATE_DISCONN_START
);
2096 if (signal_pending(current
))
2097 flush_signals(current
);
2098 del_timer_sync(&bnx2i_ep
->ofld_timer
);
2101 bnx2i_ep_active_list_del(hba
, bnx2i_ep
);
2102 if (bnx2i_tear_down_conn(hba
, bnx2i_ep
))
2105 bnx2i_ep
->state
= EP_STATE_IDLE
;
2111 * bnx2i_ep_disconnect - executes TCP connection teardown process
2112 * @ep: TCP connection (iscsi endpoint) handle
2114 * executes TCP connection teardown process
2116 static void bnx2i_ep_disconnect(struct iscsi_endpoint
*ep
)
2118 struct bnx2i_endpoint
*bnx2i_ep
;
2119 struct bnx2i_conn
*bnx2i_conn
= NULL
;
2120 struct iscsi_conn
*conn
= NULL
;
2121 struct bnx2i_hba
*hba
;
2123 bnx2i_ep
= ep
->dd_data
;
2125 /* driver should not attempt connection cleanup until TCP_CONNECT
2126 * completes either successfully or fails. Timeout is 9-secs, so
2127 * wait for it to complete
2129 while ((bnx2i_ep
->state
== EP_STATE_CONNECT_START
) &&
2130 !time_after(jiffies
, bnx2i_ep
->timestamp
+ (12 * HZ
)))
2133 if (bnx2i_ep
->conn
) {
2134 bnx2i_conn
= bnx2i_ep
->conn
;
2135 conn
= bnx2i_conn
->cls_conn
->dd_data
;
2136 iscsi_suspend_queue(conn
);
2138 hba
= bnx2i_ep
->hba
;
2140 mutex_lock(&hba
->net_dev_lock
);
2142 if (bnx2i_ep
->state
== EP_STATE_DISCONN_TIMEDOUT
)
2145 if (bnx2i_ep
->state
== EP_STATE_IDLE
)
2148 if (!test_bit(ADAPTER_STATE_UP
, &hba
->adapter_state
) ||
2149 (bnx2i_ep
->hba_age
!= hba
->age
)) {
2150 bnx2i_ep_active_list_del(hba
, bnx2i_ep
);
2154 /* Do all chip cleanup here */
2155 if (bnx2i_hw_ep_disconnect(bnx2i_ep
)) {
2156 mutex_unlock(&hba
->net_dev_lock
);
2160 bnx2i_free_qp_resc(hba
, bnx2i_ep
);
2163 bnx2i_conn
->ep
= NULL
;
2167 mutex_unlock(&hba
->net_dev_lock
);
2169 wake_up_interruptible(&hba
->eh_wait
);
2174 * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler
2175 * @buf: pointer to buffer containing iscsi path message
2178 static int bnx2i_nl_set_path(struct Scsi_Host
*shost
, struct iscsi_path
*params
)
2180 struct bnx2i_hba
*hba
= iscsi_host_priv(shost
);
2181 char *buf
= (char *) params
;
2182 u16 len
= sizeof(*params
);
2184 /* handled by cnic driver */
2185 hba
->cnic
->iscsi_nl_msg_recv(hba
->cnic
, ISCSI_UEVENT_PATH_UPDATE
, buf
,
2191 static umode_t
bnx2i_attr_is_visible(int param_type
, int param
)
2193 switch (param_type
) {
2194 case ISCSI_HOST_PARAM
:
2196 case ISCSI_HOST_PARAM_NETDEV_NAME
:
2197 case ISCSI_HOST_PARAM_HWADDRESS
:
2198 case ISCSI_HOST_PARAM_IPADDRESS
:
2205 case ISCSI_PARAM_MAX_RECV_DLENGTH
:
2206 case ISCSI_PARAM_MAX_XMIT_DLENGTH
:
2207 case ISCSI_PARAM_HDRDGST_EN
:
2208 case ISCSI_PARAM_DATADGST_EN
:
2209 case ISCSI_PARAM_CONN_ADDRESS
:
2210 case ISCSI_PARAM_CONN_PORT
:
2211 case ISCSI_PARAM_EXP_STATSN
:
2212 case ISCSI_PARAM_PERSISTENT_ADDRESS
:
2213 case ISCSI_PARAM_PERSISTENT_PORT
:
2214 case ISCSI_PARAM_PING_TMO
:
2215 case ISCSI_PARAM_RECV_TMO
:
2216 case ISCSI_PARAM_INITIAL_R2T_EN
:
2217 case ISCSI_PARAM_MAX_R2T
:
2218 case ISCSI_PARAM_IMM_DATA_EN
:
2219 case ISCSI_PARAM_FIRST_BURST
:
2220 case ISCSI_PARAM_MAX_BURST
:
2221 case ISCSI_PARAM_PDU_INORDER_EN
:
2222 case ISCSI_PARAM_DATASEQ_INORDER_EN
:
2223 case ISCSI_PARAM_ERL
:
2224 case ISCSI_PARAM_TARGET_NAME
:
2225 case ISCSI_PARAM_TPGT
:
2226 case ISCSI_PARAM_USERNAME
:
2227 case ISCSI_PARAM_PASSWORD
:
2228 case ISCSI_PARAM_USERNAME_IN
:
2229 case ISCSI_PARAM_PASSWORD_IN
:
2230 case ISCSI_PARAM_FAST_ABORT
:
2231 case ISCSI_PARAM_ABORT_TMO
:
2232 case ISCSI_PARAM_LU_RESET_TMO
:
2233 case ISCSI_PARAM_TGT_RESET_TMO
:
2234 case ISCSI_PARAM_IFACE_NAME
:
2235 case ISCSI_PARAM_INITIATOR_NAME
:
2246 * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template
2247 * used while registering with the scsi host and iSCSI transport module.
2249 static struct scsi_host_template bnx2i_host_template
= {
2250 .module
= THIS_MODULE
,
2251 .name
= "Broadcom Offload iSCSI Initiator",
2252 .proc_name
= "bnx2i",
2253 .queuecommand
= iscsi_queuecommand
,
2254 .eh_abort_handler
= iscsi_eh_abort
,
2255 .eh_device_reset_handler
= iscsi_eh_device_reset
,
2256 .eh_target_reset_handler
= iscsi_eh_recover_target
,
2257 .change_queue_depth
= iscsi_change_queue_depth
,
2258 .target_alloc
= iscsi_target_alloc
,
2263 .use_clustering
= ENABLE_CLUSTERING
,
2264 .sg_tablesize
= ISCSI_MAX_BDS_PER_CMD
,
2265 .shost_attrs
= bnx2i_dev_attributes
,
2268 struct iscsi_transport bnx2i_iscsi_transport
= {
2269 .owner
= THIS_MODULE
,
2271 .caps
= CAP_RECOVERY_L0
| CAP_HDRDGST
|
2272 CAP_MULTI_R2T
| CAP_DATADGST
|
2273 CAP_DATA_PATH_OFFLOAD
|
2275 .create_session
= bnx2i_session_create
,
2276 .destroy_session
= bnx2i_session_destroy
,
2277 .create_conn
= bnx2i_conn_create
,
2278 .bind_conn
= bnx2i_conn_bind
,
2279 .destroy_conn
= bnx2i_conn_destroy
,
2280 .attr_is_visible
= bnx2i_attr_is_visible
,
2281 .set_param
= iscsi_set_param
,
2282 .get_conn_param
= iscsi_conn_get_param
,
2283 .get_session_param
= iscsi_session_get_param
,
2284 .get_host_param
= bnx2i_host_get_param
,
2285 .start_conn
= bnx2i_conn_start
,
2286 .stop_conn
= iscsi_conn_stop
,
2287 .send_pdu
= iscsi_conn_send_pdu
,
2288 .xmit_task
= bnx2i_task_xmit
,
2289 .get_stats
= bnx2i_conn_get_stats
,
2290 /* TCP connect - disconnect - option-2 interface calls */
2291 .get_ep_param
= bnx2i_ep_get_param
,
2292 .ep_connect
= bnx2i_ep_connect
,
2293 .ep_poll
= bnx2i_ep_poll
,
2294 .ep_disconnect
= bnx2i_ep_disconnect
,
2295 .set_path
= bnx2i_nl_set_path
,
2296 /* Error recovery timeout call */
2297 .session_recovery_timedout
= iscsi_session_recovery_timedout
,
2298 .cleanup_task
= bnx2i_cleanup_task
,