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[SCSI] bnx2i: Optimized the bnx2i_stop connection clean up procedure
[deliverable/linux.git] / drivers / scsi / bnx2i / bnx2i.h
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cf4e6363
MC		 1/* bnx2i.h: Broadcom NetXtreme II iSCSI driver.
2 *
3 * Copyright (c) 2006 - 2009 Broadcom Corporation
4 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
5 * Copyright (c) 2007, 2008 Mike Christie
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation.
10 *
11 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
12 */
13
14#ifndef _BNX2I_H_
15#define _BNX2I_H_
16
17#include <linux/module.h>
18#include <linux/moduleparam.h>
19
20#include <linux/errno.h>
21#include <linux/pci.h>
22#include <linux/spinlock.h>
23#include <linux/interrupt.h>
24#include <linux/sched.h>
25#include <linux/in.h>
26#include <linux/kfifo.h>
27#include <linux/netdevice.h>
28#include <linux/completion.h>
29
30#include <scsi/scsi_cmnd.h>
31#include <scsi/scsi_device.h>
32#include <scsi/scsi_eh.h>
33#include <scsi/scsi_host.h>
34#include <scsi/scsi.h>
35#include <scsi/iscsi_proto.h>
36#include <scsi/libiscsi.h>
37#include <scsi/scsi_transport_iscsi.h>
38
39#include "../../net/cnic_if.h"
40#include "57xx_iscsi_hsi.h"
41#include "57xx_iscsi_constants.h"
42
43#define BNX2_ISCSI_DRIVER_NAME "bnx2i"
44
45#define BNX2I_MAX_ADAPTERS 8
46
47#define ISCSI_MAX_CONNS_PER_HBA 128
48#define ISCSI_MAX_SESS_PER_HBA ISCSI_MAX_CONNS_PER_HBA
49#define ISCSI_MAX_CMDS_PER_SESS 128
50
51/* Total active commands across all connections supported by devices */
52#define ISCSI_MAX_CMDS_PER_HBA_5708 (28 * (ISCSI_MAX_CMDS_PER_SESS - 1))
53#define ISCSI_MAX_CMDS_PER_HBA_5709 (128 * (ISCSI_MAX_CMDS_PER_SESS - 1))
54#define ISCSI_MAX_CMDS_PER_HBA_57710 (256 * (ISCSI_MAX_CMDS_PER_SESS - 1))
55
56#define ISCSI_MAX_BDS_PER_CMD 32
57
58#define MAX_PAGES_PER_CTRL_STRUCT_POOL 8
59#define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS 4
60
61/* 5706/08 hardware has limit on maximum buffer size per BD it can handle */
62#define MAX_BD_LENGTH 65535
63#define BD_SPLIT_SIZE 32768
64
65/* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */
66#define BNX2I_SQ_WQES_MIN 16
67#define BNX2I_570X_SQ_WQES_MAX 128
68#define BNX2I_5770X_SQ_WQES_MAX 512
69#define BNX2I_570X_SQ_WQES_DEFAULT 128
70#define BNX2I_5770X_SQ_WQES_DEFAULT 256
71
72#define BNX2I_570X_CQ_WQES_MAX 128
73#define BNX2I_5770X_CQ_WQES_MAX 512
74
75#define BNX2I_RQ_WQES_MIN 16
76#define BNX2I_RQ_WQES_MAX 32
77#define BNX2I_RQ_WQES_DEFAULT 16
78
79/* CCELLs per conn */
80#define BNX2I_CCELLS_MIN 16
81#define BNX2I_CCELLS_MAX 96
82#define BNX2I_CCELLS_DEFAULT 64
83
84#define ITT_INVALID_SIGNATURE 0xFFFF
85
86#define ISCSI_CMD_CLEANUP_TIMEOUT 100
87
88#define BNX2I_CONN_CTX_BUF_SIZE 16384
89
90#define BNX2I_SQ_WQE_SIZE 64
91#define BNX2I_RQ_WQE_SIZE 256
92#define BNX2I_CQE_SIZE 64
93
94#define MB_KERNEL_CTX_SHIFT 8
95#define MB_KERNEL_CTX_SIZE (1 << MB_KERNEL_CTX_SHIFT)
96
97#define CTX_SHIFT 7
98#define GET_CID_NUM(cid_addr) ((cid_addr) >> CTX_SHIFT)
99
100#define CTX_OFFSET 0x10000
101#define MAX_CID_CNT 0x4000
102
53203244
AV		 103#define BNX2I_570X_PAGE_SIZE_DEFAULT 4096
104
cf4e6363
MC		 105/* 5709 context registers */
106#define BNX2_MQ_CONFIG2 0x00003d00
107#define BNX2_MQ_CONFIG2_CONT_SZ (0x7L<<4)
108#define BNX2_MQ_CONFIG2_FIRST_L4L5 (0x1fL<<8)
109
110/* 57710's BAR2 is mapped to doorbell registers */
111#define BNX2X_DOORBELL_PCI_BAR 2
112#define BNX2X_MAX_CQS 8
113
114#define CNIC_ARM_CQE 1
115#define CNIC_DISARM_CQE 0
116
117#define REG_RD(__hba, offset) \
118 readl(__hba->regview + offset)
119#define REG_WR(__hba, offset, val) \
120 writel(val, __hba->regview + offset)
121
122
123/**
124 * struct generic_pdu_resc - login pdu resource structure
125 *
126 * @req_buf: driver buffer used to stage payload associated with
127 * the login request
128 * @req_dma_addr: dma address for iscsi login request payload buffer
129 * @req_buf_size: actual login request payload length
130 * @req_wr_ptr: pointer into login request buffer when next data is
131 * to be written
132 * @resp_hdr: iscsi header where iscsi login response header is to
133 * be recreated
134 * @resp_buf: buffer to stage login response payload
135 * @resp_dma_addr: login response payload buffer dma address
136 * @resp_buf_size: login response paylod length
137 * @resp_wr_ptr: pointer into login response buffer when next data is
138 * to be written
139 * @req_bd_tbl: iscsi login request payload BD table
140 * @req_bd_dma: login request BD table dma address
141 * @resp_bd_tbl: iscsi login response payload BD table
142 * @resp_bd_dma: login request BD table dma address
143 *
144 * following structure defines buffer info for generic pdus such as iSCSI Login,
145 * Logout and NOP
146 */
147struct generic_pdu_resc {
148 char *req_buf;
149 dma_addr_t req_dma_addr;
150 u32 req_buf_size;
151 char *req_wr_ptr;
152 struct iscsi_hdr resp_hdr;
153 char *resp_buf;
154 dma_addr_t resp_dma_addr;
155 u32 resp_buf_size;
156 char *resp_wr_ptr;
157 char *req_bd_tbl;
158 dma_addr_t req_bd_dma;
159 char *resp_bd_tbl;
160 dma_addr_t resp_bd_dma;
161};
162
163
164/**
165 * struct bd_resc_page - tracks DMA'able memory allocated for BD tables
166 *
167 * @link: list head to link elements
168 * @max_ptrs: maximun pointers that can be stored in this page
169 * @num_valid: number of pointer valid in this page
170 * @page: base addess for page pointer array
171 *
172 * structure to track DMA'able memory allocated for command BD tables
173 */
174struct bd_resc_page {
175 struct list_head link;
176 u32 max_ptrs;
177 u32 num_valid;
178 void *page[1];
179};
180
181
182/**
183 * struct io_bdt - I/O buffer destricptor table
184 *
185 * @bd_tbl: BD table's virtual address
186 * @bd_tbl_dma: BD table's dma address
187 * @bd_valid: num valid BD entries
188 *
189 * IO BD table
190 */
191struct io_bdt {
192 struct iscsi_bd *bd_tbl;
193 dma_addr_t bd_tbl_dma;
194 u16 bd_valid;
195};
196
197
198/**
199 * bnx2i_cmd - iscsi command structure
200 *
201 * @scsi_cmd: SCSI-ML task pointer corresponding to this iscsi cmd
202 * @sg: SG list
203 * @io_tbl: buffer descriptor (BD) table
204 * @bd_tbl_dma: buffer descriptor (BD) table's dma address
205 */
206struct bnx2i_cmd {
207 struct iscsi_hdr hdr;
208 struct bnx2i_conn *conn;
209 struct scsi_cmnd *scsi_cmd;
210 struct scatterlist *sg;
211 struct io_bdt io_tbl;
212 dma_addr_t bd_tbl_dma;
213 struct bnx2i_cmd_request req;
214};
215
216
217/**
218 * struct bnx2i_conn - iscsi connection structure
219 *
220 * @cls_conn: pointer to iscsi cls conn
221 * @hba: adapter structure pointer
222 * @iscsi_conn_cid: iscsi conn id
223 * @fw_cid: firmware iscsi context id
224 * @ep: endpoint structure pointer
225 * @gen_pdu: login/nopout/logout pdu resources
226 * @violation_notified: bit mask used to track iscsi error/warning messages
227 * already printed out
228 *
229 * iSCSI connection structure
230 */
231struct bnx2i_conn {
232 struct iscsi_cls_conn *cls_conn;
233 struct bnx2i_hba *hba;
234 struct completion cmd_cleanup_cmpl;
cf4e6363
MC		 235
236 u32 iscsi_conn_cid;
237#define BNX2I_CID_RESERVED 0x5AFF
238 u32 fw_cid;
239
240 struct timer_list poll_timer;
241 /*
242 * Queue Pair (QP) related structure elements.
243 */
244 struct bnx2i_endpoint *ep;
245
246 /*
247 * Buffer for login negotiation process
248 */
249 struct generic_pdu_resc gen_pdu;
250 u64 violation_notified;
251};
252
253
254
255/**
256 * struct iscsi_cid_queue - Per adapter iscsi cid queue
257 *
258 * @cid_que_base: queue base memory
259 * @cid_que: queue memory pointer
260 * @cid_q_prod_idx: produce index
261 * @cid_q_cons_idx: consumer index
262 * @cid_q_max_idx: max index. used to detect wrap around condition
263 * @cid_free_cnt: queue size
264 * @conn_cid_tbl: iscsi cid to conn structure mapping table
265 *
266 * Per adapter iSCSI CID Queue
267 */
268struct iscsi_cid_queue {
269 void *cid_que_base;
270 u32 *cid_que;
271 u32 cid_q_prod_idx;
272 u32 cid_q_cons_idx;
273 u32 cid_q_max_idx;
274 u32 cid_free_cnt;
275 struct bnx2i_conn **conn_cid_tbl;
276};
277
278/**
279 * struct bnx2i_hba - bnx2i adapter structure
280 *
281 * @link: list head to link elements
282 * @cnic: pointer to cnic device
283 * @pcidev: pointer to pci dev
284 * @netdev: pointer to netdev structure
285 * @regview: mapped PCI register space
286 * @age: age, incremented by every recovery
287 * @cnic_dev_type: cnic device type, 5706/5708/5709/57710
288 * @mail_queue_access: mailbox queue access mode, applicable to 5709 only
289 * @reg_with_cnic: indicates whether the device is register with CNIC
290 * @adapter_state: adapter state, UP, GOING_DOWN, LINK_DOWN
291 * @mtu_supported: Ethernet MTU supported
292 * @shost: scsi host pointer
293 * @max_sqes: SQ size
294 * @max_rqes: RQ size
295 * @max_cqes: CQ size
296 * @num_ccell: number of command cells per connection
297 * @ofld_conns_active: active connection list
55e15c97 298 * @eh_wait: wait queue for the endpoint to shutdown
cf4e6363
MC		 299 * @max_active_conns: max offload connections supported by this device
300 * @cid_que: iscsi cid queue
301 * @ep_rdwr_lock: read / write lock to synchronize various ep lists
302 * @ep_ofld_list: connection list for pending offload completion
46012e8b 303 * @ep_active_list: connection list for active offload endpoints
cf4e6363
MC		 304 * @ep_destroy_list: connection list for pending offload completion
305 * @mp_bd_tbl: BD table to be used with middle path requests
306 * @mp_bd_dma: DMA address of 'mp_bd_tbl' memory buffer
307 * @dummy_buffer: Dummy buffer to be used with zero length scsicmd reqs
308 * @dummy_buf_dma: DMA address of 'dummy_buffer' memory buffer
309 * @lock: lock to synchonize access to hba structure
55e15c97 310 * @hba_shutdown_tmo: Timeout value to shutdown each connection
cf4e6363
MC		 311 * @pci_did: PCI device ID
312 * @pci_vid: PCI vendor ID
313 * @pci_sdid: PCI subsystem device ID
314 * @pci_svid: PCI subsystem vendor ID
315 * @pci_func: PCI function number in system pci tree
316 * @pci_devno: PCI device number in system pci tree
317 * @num_wqe_sent: statistic counter, total wqe's sent
318 * @num_cqe_rcvd: statistic counter, total cqe's received
319 * @num_intr_claimed: statistic counter, total interrupts claimed
320 * @link_changed_count: statistic counter, num of link change notifications
321 * received
322 * @ipaddr_changed_count: statistic counter, num times IP address changed while
323 * at least one connection is offloaded
324 * @num_sess_opened: statistic counter, total num sessions opened
325 * @num_conn_opened: statistic counter, total num conns opened on this hba
326 * @ctx_ccell_tasks: captures number of ccells and tasks supported by
327 * currently offloaded connection, used to decode
328 * context memory
329 *
330 * Adapter Data Structure
331 */
332struct bnx2i_hba {
333 struct list_head link;
334 struct cnic_dev *cnic;
335 struct pci_dev *pcidev;
336 struct net_device *netdev;
337 void __iomem *regview;
338
339 u32 age;
340 unsigned long cnic_dev_type;
341 #define BNX2I_NX2_DEV_5706 0x0
342 #define BNX2I_NX2_DEV_5708 0x1
343 #define BNX2I_NX2_DEV_5709 0x2
344 #define BNX2I_NX2_DEV_57710 0x3
345 u32 mail_queue_access;
346 #define BNX2I_MQ_KERNEL_MODE 0x0
347 #define BNX2I_MQ_KERNEL_BYPASS_MODE 0x1
348 #define BNX2I_MQ_BIN_MODE 0x2
349 unsigned long reg_with_cnic;
350 #define BNX2I_CNIC_REGISTERED 1
351
352 unsigned long adapter_state;
353 #define ADAPTER_STATE_UP 0
354 #define ADAPTER_STATE_GOING_DOWN 1
355 #define ADAPTER_STATE_LINK_DOWN 2
356 #define ADAPTER_STATE_INIT_FAILED 31
357 unsigned int mtu_supported;
358 #define BNX2I_MAX_MTU_SUPPORTED 1500
359
360 struct Scsi_Host *shost;
361
362 u32 max_sqes;
363 u32 max_rqes;
364 u32 max_cqes;
365 u32 num_ccell;
366
367 int ofld_conns_active;
490475a9 368 wait_queue_head_t eh_wait;
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MC		 369
370 int max_active_conns;
371 struct iscsi_cid_queue cid_que;
372
373 rwlock_t ep_rdwr_lock;
374 struct list_head ep_ofld_list;
46012e8b 375 struct list_head ep_active_list;
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MC		 376 struct list_head ep_destroy_list;
377
378 /*
379 * BD table to be used with MP (Middle Path requests.
380 */
381 char *mp_bd_tbl;
382 dma_addr_t mp_bd_dma;
383 char *dummy_buffer;
384 dma_addr_t dummy_buf_dma;
385
386 spinlock_t lock; /* protects hba structure access */
387 struct mutex net_dev_lock;/* sync net device access */
388
490475a9 389 int hba_shutdown_tmo;
cf4e6363
MC		 390 /*
391 * PCI related info.
392 */
393 u16 pci_did;
394 u16 pci_vid;
395 u16 pci_sdid;
396 u16 pci_svid;
397 u16 pci_func;
398 u16 pci_devno;
399
400 /*
401 * Following are a bunch of statistics useful during development
402 * and later stage for score boarding.
403 */
404 u32 num_wqe_sent;
405 u32 num_cqe_rcvd;
406 u32 num_intr_claimed;
407 u32 link_changed_count;
408 u32 ipaddr_changed_count;
409 u32 num_sess_opened;
410 u32 num_conn_opened;
411 unsigned int ctx_ccell_tasks;
412};
413
414
415/*******************************************************************************
416 * QP [ SQ / RQ / CQ ] info.
417 ******************************************************************************/
418
419/*
420 * SQ/RQ/CQ generic structure definition
421 */
422struct sqe {
423 u8 sqe_byte[BNX2I_SQ_WQE_SIZE];
424};
425
426struct rqe {
427 u8 rqe_byte[BNX2I_RQ_WQE_SIZE];
428};
429
430struct cqe {
431 u8 cqe_byte[BNX2I_CQE_SIZE];
432};
433
434
435enum {
436#if defined(__LITTLE_ENDIAN)
437 CNIC_EVENT_COAL_INDEX = 0x0,
438 CNIC_SEND_DOORBELL = 0x4,
439 CNIC_EVENT_CQ_ARM = 0x7,
440 CNIC_RECV_DOORBELL = 0x8
441#elif defined(__BIG_ENDIAN)
442 CNIC_EVENT_COAL_INDEX = 0x2,
443 CNIC_SEND_DOORBELL = 0x6,
444 CNIC_EVENT_CQ_ARM = 0x4,
445 CNIC_RECV_DOORBELL = 0xa
446#endif
447};
448
449
450/*
451 * CQ DB
452 */
453struct bnx2x_iscsi_cq_pend_cmpl {
454 /* CQ producer, updated by Ustorm */
455 u16 ustrom_prod;
456 /* CQ pending completion counter */
457 u16 pend_cntr;
458};
459
460
461struct bnx2i_5771x_cq_db {
462 struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS];
463 /* CQ pending completion ITT array */
464 u16 itt[BNX2X_MAX_CQS];
465 /* Cstorm CQ sequence to notify array, updated by driver */;
466 u16 sqn[BNX2X_MAX_CQS];
467 u32 reserved[4] /* 16 byte allignment */;
468};
469
470
471struct bnx2i_5771x_sq_rq_db {
472 u16 prod_idx;
473 u8 reserved0[14]; /* Pad structure size to 16 bytes */
474};
475
476
477struct bnx2i_5771x_dbell_hdr {
478 u8 header;
479 /* 1 for rx doorbell, 0 for tx doorbell */
480#define B577XX_DOORBELL_HDR_RX (0x1<<0)
481#define B577XX_DOORBELL_HDR_RX_SHIFT 0
482 /* 0 for normal doorbell, 1 for advertise wnd doorbell */
483#define B577XX_DOORBELL_HDR_DB_TYPE (0x1<<1)
484#define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT 1
485 /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */
486#define B577XX_DOORBELL_HDR_DPM_SIZE (0x3<<2)
487#define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT 2
488 /* connection type */
489#define B577XX_DOORBELL_HDR_CONN_TYPE (0xF<<4)
490#define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT 4
491};
492
493struct bnx2i_5771x_dbell {
494 struct bnx2i_5771x_dbell_hdr dbell;
495 u8 pad[3];
496
497};
498
499/**
500 * struct qp_info - QP (share queue region) atrributes structure
501 *
502 * @ctx_base: ioremapped pci register base to access doorbell register
503 * pertaining to this offloaded connection
504 * @sq_virt: virtual address of send queue (SQ) region
505 * @sq_phys: DMA address of SQ memory region
506 * @sq_mem_size: SQ size
507 * @sq_prod_qe: SQ producer entry pointer
508 * @sq_cons_qe: SQ consumer entry pointer
509 * @sq_first_qe: virtaul address of first entry in SQ
510 * @sq_last_qe: virtaul address of last entry in SQ
511 * @sq_prod_idx: SQ producer index
512 * @sq_cons_idx: SQ consumer index
513 * @sqe_left: number sq entry left
514 * @sq_pgtbl_virt: page table describing buffer consituting SQ region
515 * @sq_pgtbl_phys: dma address of 'sq_pgtbl_virt'
516 * @sq_pgtbl_size: SQ page table size
517 * @cq_virt: virtual address of completion queue (CQ) region
518 * @cq_phys: DMA address of RQ memory region
519 * @cq_mem_size: CQ size
520 * @cq_prod_qe: CQ producer entry pointer
521 * @cq_cons_qe: CQ consumer entry pointer
522 * @cq_first_qe: virtaul address of first entry in CQ
523 * @cq_last_qe: virtaul address of last entry in CQ
524 * @cq_prod_idx: CQ producer index
525 * @cq_cons_idx: CQ consumer index
526 * @cqe_left: number cq entry left
527 * @cqe_size: size of each CQ entry
528 * @cqe_exp_seq_sn: next expected CQE sequence number
529 * @cq_pgtbl_virt: page table describing buffer consituting CQ region
530 * @cq_pgtbl_phys: dma address of 'cq_pgtbl_virt'
531 * @cq_pgtbl_size: CQ page table size
532 * @rq_virt: virtual address of receive queue (RQ) region
533 * @rq_phys: DMA address of RQ memory region
534 * @rq_mem_size: RQ size
535 * @rq_prod_qe: RQ producer entry pointer
536 * @rq_cons_qe: RQ consumer entry pointer
537 * @rq_first_qe: virtaul address of first entry in RQ
538 * @rq_last_qe: virtaul address of last entry in RQ
539 * @rq_prod_idx: RQ producer index
540 * @rq_cons_idx: RQ consumer index
541 * @rqe_left: number rq entry left
542 * @rq_pgtbl_virt: page table describing buffer consituting RQ region
543 * @rq_pgtbl_phys: dma address of 'rq_pgtbl_virt'
544 * @rq_pgtbl_size: RQ page table size
545 *
546 * queue pair (QP) is a per connection shared data structure which is used
547 * to send work requests (SQ), receive completion notifications (CQ)
548 * and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure
549 * below holds queue memory, consumer/producer indexes and page table
550 * information
551 */
552struct qp_info {
553 void __iomem *ctx_base;
554#define DPM_TRIGER_TYPE 0x40
555
556#define BNX2I_570x_QUE_DB_SIZE 0
557#define BNX2I_5771x_QUE_DB_SIZE 16
558 struct sqe *sq_virt;
559 dma_addr_t sq_phys;
560 u32 sq_mem_size;
561
562 struct sqe *sq_prod_qe;
563 struct sqe *sq_cons_qe;
564 struct sqe *sq_first_qe;
565 struct sqe *sq_last_qe;
566 u16 sq_prod_idx;
567 u16 sq_cons_idx;
568 u32 sqe_left;
569
570 void *sq_pgtbl_virt;
571 dma_addr_t sq_pgtbl_phys;
572 u32 sq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */
573
574 struct cqe *cq_virt;
575 dma_addr_t cq_phys;
576 u32 cq_mem_size;
577
578 struct cqe *cq_prod_qe;
579 struct cqe *cq_cons_qe;
580 struct cqe *cq_first_qe;
581 struct cqe *cq_last_qe;
582 u16 cq_prod_idx;
583 u16 cq_cons_idx;
584 u32 cqe_left;
585 u32 cqe_size;
586 u32 cqe_exp_seq_sn;
587
588 void *cq_pgtbl_virt;
589 dma_addr_t cq_pgtbl_phys;
590 u32 cq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */
591
592 struct rqe *rq_virt;
593 dma_addr_t rq_phys;
594 u32 rq_mem_size;
595
596 struct rqe *rq_prod_qe;
597 struct rqe *rq_cons_qe;
598 struct rqe *rq_first_qe;
599 struct rqe *rq_last_qe;
600 u16 rq_prod_idx;
601 u16 rq_cons_idx;
602 u32 rqe_left;
603
604 void *rq_pgtbl_virt;
605 dma_addr_t rq_pgtbl_phys;
606 u32 rq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */
607};
608
609
610
611/*
612 * CID handles
613 */
614struct ep_handles {
615 u32 fw_cid;
616 u32 drv_iscsi_cid;
617 u16 pg_cid;
618 u16 rsvd;
619};
620
621
622enum {
623 EP_STATE_IDLE = 0x0,
624 EP_STATE_PG_OFLD_START = 0x1,
625 EP_STATE_PG_OFLD_COMPL = 0x2,
626 EP_STATE_OFLD_START = 0x4,
627 EP_STATE_OFLD_COMPL = 0x8,
628 EP_STATE_CONNECT_START = 0x10,
629 EP_STATE_CONNECT_COMPL = 0x20,
630 EP_STATE_ULP_UPDATE_START = 0x40,
631 EP_STATE_ULP_UPDATE_COMPL = 0x80,
632 EP_STATE_DISCONN_START = 0x100,
633 EP_STATE_DISCONN_COMPL = 0x200,
634 EP_STATE_CLEANUP_START = 0x400,
635 EP_STATE_CLEANUP_CMPL = 0x800,
636 EP_STATE_TCP_FIN_RCVD = 0x1000,
637 EP_STATE_TCP_RST_RCVD = 0x2000,
638 EP_STATE_PG_OFLD_FAILED = 0x1000000,
639 EP_STATE_ULP_UPDATE_FAILED = 0x2000000,
640 EP_STATE_CLEANUP_FAILED = 0x4000000,
641 EP_STATE_OFLD_FAILED = 0x8000000,
642 EP_STATE_CONNECT_FAILED = 0x10000000,
643 EP_STATE_DISCONN_TIMEDOUT = 0x20000000,
644};
645
646/**
647 * struct bnx2i_endpoint - representation of tcp connection in NX2 world
648 *
649 * @link: list head to link elements
650 * @hba: adapter to which this connection belongs
651 * @conn: iscsi connection this EP is linked to
46012e8b 652 * @cls_ep: associated iSCSI endpoint pointer
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MC		 653 * @sess: iscsi session this EP is linked to
654 * @cm_sk: cnic sock struct
655 * @hba_age: age to detect if 'iscsid' issues ep_disconnect()
656 * after HBA reset is completed by bnx2i/cnic/bnx2
657 * modules
658 * @state: tracks offload connection state machine
659 * @teardown_mode: indicates if conn teardown is abortive or orderly
660 * @qp: QP information
661 * @ids: contains chip allocated *context id* & driver assigned
662 * *iscsi cid*
663 * @ofld_timer: offload timer to detect timeout
664 * @ofld_wait: wait queue
665 *
666 * Endpoint Structure - equivalent of tcp socket structure
667 */
668struct bnx2i_endpoint {
669 struct list_head link;
670 struct bnx2i_hba *hba;
671 struct bnx2i_conn *conn;
46012e8b 672 struct iscsi_endpoint *cls_ep;
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MC		 673 struct cnic_sock *cm_sk;
674 u32 hba_age;
675 u32 state;
676 unsigned long timestamp;
677 int num_active_cmds;
678
679 struct qp_info qp;
680 struct ep_handles ids;
681 #define ep_iscsi_cid ids.drv_iscsi_cid
682 #define ep_cid ids.fw_cid
683 #define ep_pg_cid ids.pg_cid
684 struct timer_list ofld_timer;
685 wait_queue_head_t ofld_wait;
686};
687
688
689
690/* Global variables */
691extern unsigned int error_mask1, error_mask2;
692extern u64 iscsi_error_mask;
693extern unsigned int en_tcp_dack;
694extern unsigned int event_coal_div;
8776193b 695extern unsigned int event_coal_min;
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MC		 696
697extern struct scsi_transport_template *bnx2i_scsi_xport_template;
698extern struct iscsi_transport bnx2i_iscsi_transport;
699extern struct cnic_ulp_ops bnx2i_cnic_cb;
700
701extern unsigned int sq_size;
702extern unsigned int rq_size;
703
704extern struct device_attribute *bnx2i_dev_attributes[];
705
706
707
708/*
709 * Function Prototypes
710 */
711extern void bnx2i_identify_device(struct bnx2i_hba *hba);
712extern void bnx2i_register_device(struct bnx2i_hba *hba);
713
714extern void bnx2i_ulp_init(struct cnic_dev *dev);
715extern void bnx2i_ulp_exit(struct cnic_dev *dev);
716extern void bnx2i_start(void *handle);
717extern void bnx2i_stop(void *handle);
718extern void bnx2i_reg_dev_all(void);
719extern void bnx2i_unreg_dev_all(void);
720extern struct bnx2i_hba *get_adapter_list_head(void);
721
722struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
723 u16 iscsi_cid);
724
725int bnx2i_alloc_ep_pool(void);
726void bnx2i_release_ep_pool(void);
727struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba);
728struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba);
729
730struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic);
731
732struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic);
733void bnx2i_free_hba(struct bnx2i_hba *hba);
734
735void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len);
736void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count);
737
738void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd);
739
740void bnx2i_drop_session(struct iscsi_cls_session *session);
741
742extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba);
743extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn,
744 struct iscsi_task *mtask);
745extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn,
746 struct iscsi_task *mtask);
747extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn,
748 struct bnx2i_cmd *cmnd);
749extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn,
750 struct iscsi_task *mtask, u32 ttt,
751 char *datap, int data_len, int unsol);
752extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn,
753 struct iscsi_task *mtask);
754extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba,
755 struct bnx2i_cmd *cmd);
756extern void bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba,
757 struct bnx2i_endpoint *ep);
758extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn);
759extern void bnx2i_send_conn_destroy(struct bnx2i_hba *hba,
760 struct bnx2i_endpoint *ep);
761
762extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba,
763 struct bnx2i_endpoint *ep);
764extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba,
765 struct bnx2i_endpoint *ep);
766extern void bnx2i_ep_ofld_timer(unsigned long data);
767extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list(
768 struct bnx2i_hba *hba, u32 iscsi_cid);
769extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list(
770 struct bnx2i_hba *hba, u32 iscsi_cid);
771
772extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep);
773extern void bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action);
774
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EW		 775extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep);
776
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MC		 777/* Debug related function prototypes */
778extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn);
779extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn);
780extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn);
781extern void bnx2i_print_recv_state(struct bnx2i_conn *conn);
782
783#endif
Linux kernel - Deliverables
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