1 /* bnx2i.h: QLogic NetXtreme II iSCSI driver.
2 *
3 * Copyright (c) 2006 - 2013 Broadcom Corporation
4 * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved.
5 * Copyright (c) 2007, 2008 Mike Christie
6 * Copyright (c) 2014, QLogic Corporation
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation.
11 *
12 * Written by: Anil Veerabhadrappa (anilgv@broadcom.com)
13 * Previously Maintained by: Eddie Wai (eddie.wai@broadcom.com)
14 * Maintained by: QLogic-Storage-Upstream@qlogic.com
15 */
16
17 #ifndef _BNX2I_H_
18 #define _BNX2I_H_
19
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22
23 #include <linux/errno.h>
24 #include <linux/pci.h>
25 #include <linux/spinlock.h>
26 #include <linux/interrupt.h>
27 #include <linux/delay.h>
28 #include <linux/sched/signal.h>
29 #include <linux/in.h>
30 #include <linux/kfifo.h>
31 #include <linux/netdevice.h>
32 #include <linux/completion.h>
33 #include <linux/kthread.h>
34 #include <linux/cpu.h>
35
36 #include <scsi/scsi_cmnd.h>
37 #include <scsi/scsi_device.h>
38 #include <scsi/scsi_eh.h>
39 #include <scsi/scsi_host.h>
40 #include <scsi/scsi.h>
41 #include <scsi/iscsi_proto.h>
42 #include <scsi/libiscsi.h>
43 #include <scsi/scsi_transport_iscsi.h>
44
45 #include "../../net/ethernet/broadcom/cnic_if.h"
46 #include "57xx_iscsi_hsi.h"
47 #include "57xx_iscsi_constants.h"
48
49 #include "../../net/ethernet/broadcom/bnx2x/bnx2x_mfw_req.h"
50
51 #define BNX2_ISCSI_DRIVER_NAME "bnx2i"
52
53 #define BNX2I_MAX_ADAPTERS 8
54
55 #define ISCSI_MAX_CONNS_PER_HBA 128
56 #define ISCSI_MAX_SESS_PER_HBA ISCSI_MAX_CONNS_PER_HBA
57 #define ISCSI_MAX_CMDS_PER_SESS 128
58
59 /* Total active commands across all connections supported by devices */
60 #define ISCSI_MAX_CMDS_PER_HBA_5708 (28 * (ISCSI_MAX_CMDS_PER_SESS - 1))
61 #define ISCSI_MAX_CMDS_PER_HBA_5709 (128 * (ISCSI_MAX_CMDS_PER_SESS - 1))
62 #define ISCSI_MAX_CMDS_PER_HBA_57710 (256 * (ISCSI_MAX_CMDS_PER_SESS - 1))
63
64 #define ISCSI_MAX_BDS_PER_CMD 32
65
66 #define MAX_PAGES_PER_CTRL_STRUCT_POOL 8
67 #define BNX2I_RESERVED_SLOW_PATH_CMD_SLOTS 4
68
69 #define BNX2X_DB_SHIFT 3
70
71 /* 5706/08 hardware has limit on maximum buffer size per BD it can handle */
72 #define MAX_BD_LENGTH 65535
73 #define BD_SPLIT_SIZE 32768
74
75 /* min, max & default values for SQ/RQ/CQ size, configurable via' modparam */
76 #define BNX2I_SQ_WQES_MIN 16
77 #define BNX2I_570X_SQ_WQES_MAX 128
78 #define BNX2I_5770X_SQ_WQES_MAX 512
79 #define BNX2I_570X_SQ_WQES_DEFAULT 128
80 #define BNX2I_5770X_SQ_WQES_DEFAULT 128
81
82 #define BNX2I_570X_CQ_WQES_MAX 128
83 #define BNX2I_5770X_CQ_WQES_MAX 512
84
85 #define BNX2I_RQ_WQES_MIN 16
86 #define BNX2I_RQ_WQES_MAX 32
87 #define BNX2I_RQ_WQES_DEFAULT 16
88
89 /* CCELLs per conn */
90 #define BNX2I_CCELLS_MIN 16
91 #define BNX2I_CCELLS_MAX 96
92 #define BNX2I_CCELLS_DEFAULT 64
93
94 #define ITT_INVALID_SIGNATURE 0xFFFF
95
96 #define ISCSI_CMD_CLEANUP_TIMEOUT 100
97
98 #define BNX2I_CONN_CTX_BUF_SIZE 16384
99
100 #define BNX2I_SQ_WQE_SIZE 64
101 #define BNX2I_RQ_WQE_SIZE 256
102 #define BNX2I_CQE_SIZE 64
103
104 #define MB_KERNEL_CTX_SHIFT 8
105 #define MB_KERNEL_CTX_SIZE (1 << MB_KERNEL_CTX_SHIFT)
106
107 #define CTX_SHIFT 7
108 #define GET_CID_NUM(cid_addr) ((cid_addr) >> CTX_SHIFT)
109
110 #define CTX_OFFSET 0x10000
111 #define MAX_CID_CNT 0x4000
112
113 #define BNX2I_570X_PAGE_SIZE_DEFAULT 4096
114
115 /* 5709 context registers */
116 #define BNX2_MQ_CONFIG2 0x00003d00
117 #define BNX2_MQ_CONFIG2_CONT_SZ (0x7L<<4)
118 #define BNX2_MQ_CONFIG2_FIRST_L4L5 (0x1fL<<8)
119
120 /* 57710's BAR2 is mapped to doorbell registers */
121 #define BNX2X_DOORBELL_PCI_BAR 2
122 #define BNX2X_MAX_CQS 8
123
124 #define CNIC_ARM_CQE 1
125 #define CNIC_ARM_CQE_FP 2
126 #define CNIC_DISARM_CQE 0
127
128 #define REG_RD(__hba, offset) \
129 readl(__hba->regview + offset)
130 #define REG_WR(__hba, offset, val) \
131 writel(val, __hba->regview + offset)
132
133 #ifdef CONFIG_32BIT
134 #define GET_STATS_64(__hba, dst, field) \
135 do { \
136 spin_lock_bh(&__hba->stat_lock); \
137 dst->field##_lo = __hba->stats.field##_lo; \
138 dst->field##_hi = __hba->stats.field##_hi; \
139 spin_unlock_bh(&__hba->stat_lock); \
140 } while (0)
141
142 #define ADD_STATS_64(__hba, field, len) \
143 do { \
144 if (spin_trylock(&__hba->stat_lock)) { \
145 if (__hba->stats.field##_lo + len < \
146 __hba->stats.field##_lo) \
147 __hba->stats.field##_hi++; \
148 __hba->stats.field##_lo += len; \
149 spin_unlock(&__hba->stat_lock); \
150 } \
151 } while (0)
152
153 #else
154 #define GET_STATS_64(__hba, dst, field) \
155 do { \
156 u64 val, *out; \
157 \
158 val = __hba->bnx2i_stats.field; \
159 out = (u64 *)&__hba->stats.field##_lo; \
160 *out = cpu_to_le64(val); \
161 out = (u64 *)&dst->field##_lo; \
162 *out = cpu_to_le64(val); \
163 } while (0)
164
165 #define ADD_STATS_64(__hba, field, len) \
166 do { \
167 __hba->bnx2i_stats.field += len; \
168 } while (0)
169 #endif
170
171 /**
172 * struct generic_pdu_resc - login pdu resource structure
173 *
174 * @req_buf: driver buffer used to stage payload associated with
175 * the login request
176 * @req_dma_addr: dma address for iscsi login request payload buffer
177 * @req_buf_size: actual login request payload length
178 * @req_wr_ptr: pointer into login request buffer when next data is
179 * to be written
180 * @resp_hdr: iscsi header where iscsi login response header is to
181 * be recreated
182 * @resp_buf: buffer to stage login response payload
183 * @resp_dma_addr: login response payload buffer dma address
184 * @resp_buf_size: login response paylod length
185 * @resp_wr_ptr: pointer into login response buffer when next data is
186 * to be written
187 * @req_bd_tbl: iscsi login request payload BD table
188 * @req_bd_dma: login request BD table dma address
189 * @resp_bd_tbl: iscsi login response payload BD table
190 * @resp_bd_dma: login request BD table dma address
191 *
192 * following structure defines buffer info for generic pdus such as iSCSI Login,
193 * Logout and NOP
194 */
195 struct generic_pdu_resc {
196 char *req_buf;
197 dma_addr_t req_dma_addr;
198 u32 req_buf_size;
199 char *req_wr_ptr;
200 struct iscsi_hdr resp_hdr;
201 char *resp_buf;
202 dma_addr_t resp_dma_addr;
203 u32 resp_buf_size;
204 char *resp_wr_ptr;
205 char *req_bd_tbl;
206 dma_addr_t req_bd_dma;
207 char *resp_bd_tbl;
208 dma_addr_t resp_bd_dma;
209 };
210
211
212 /**
213 * struct bd_resc_page - tracks DMA'able memory allocated for BD tables
214 *
215 * @link: list head to link elements
216 * @max_ptrs: maximun pointers that can be stored in this page
217 * @num_valid: number of pointer valid in this page
218 * @page: base addess for page pointer array
219 *
220 * structure to track DMA'able memory allocated for command BD tables
221 */
222 struct bd_resc_page {
223 struct list_head link;
224 u32 max_ptrs;
225 u32 num_valid;
226 void *page[1];
227 };
228
229
230 /**
231 * struct io_bdt - I/O buffer destricptor table
232 *
233 * @bd_tbl: BD table's virtual address
234 * @bd_tbl_dma: BD table's dma address
235 * @bd_valid: num valid BD entries
236 *
237 * IO BD table
238 */
239 struct io_bdt {
240 struct iscsi_bd *bd_tbl;
241 dma_addr_t bd_tbl_dma;
242 u16 bd_valid;
243 };
244
245
246 /**
247 * bnx2i_cmd - iscsi command structure
248 *
249 * @hdr: iSCSI header
250 * @conn: iscsi_conn pointer
251 * @scsi_cmd: SCSI-ML task pointer corresponding to this iscsi cmd
252 * @sg: SG list
253 * @io_tbl: buffer descriptor (BD) table
254 * @bd_tbl_dma: buffer descriptor (BD) table's dma address
255 * @req: bnx2i specific command request struct
256 */
257 struct bnx2i_cmd {
258 struct iscsi_hdr hdr;
259 struct bnx2i_conn *conn;
260 struct scsi_cmnd *scsi_cmd;
261 struct scatterlist *sg;
262 struct io_bdt io_tbl;
263 dma_addr_t bd_tbl_dma;
264 struct bnx2i_cmd_request req;
265 };
266
267
268 /**
269 * struct bnx2i_conn - iscsi connection structure
270 *
271 * @cls_conn: pointer to iscsi cls conn
272 * @hba: adapter structure pointer
273 * @iscsi_conn_cid: iscsi conn id
274 * @fw_cid: firmware iscsi context id
275 * @ep: endpoint structure pointer
276 * @gen_pdu: login/nopout/logout pdu resources
277 * @violation_notified: bit mask used to track iscsi error/warning messages
278 * already printed out
279 * @work_cnt: keeps track of the number of outstanding work
280 *
281 * iSCSI connection structure
282 */
283 struct bnx2i_conn {
284 struct iscsi_cls_conn *cls_conn;
285 struct bnx2i_hba *hba;
286 struct completion cmd_cleanup_cmpl;
287
288 u32 iscsi_conn_cid;
289 #define BNX2I_CID_RESERVED 0x5AFF
290 u32 fw_cid;
291
292 struct timer_list poll_timer;
293 /*
294 * Queue Pair (QP) related structure elements.
295 */
296 struct bnx2i_endpoint *ep;
297
298 /*
299 * Buffer for login negotiation process
300 */
301 struct generic_pdu_resc gen_pdu;
302 u64 violation_notified;
303
304 atomic_t work_cnt;
305 };
306
307
308
309 /**
310 * struct iscsi_cid_queue - Per adapter iscsi cid queue
311 *
312 * @cid_que_base: queue base memory
313 * @cid_que: queue memory pointer
314 * @cid_q_prod_idx: produce index
315 * @cid_q_cons_idx: consumer index
316 * @cid_q_max_idx: max index. used to detect wrap around condition
317 * @cid_free_cnt: queue size
318 * @conn_cid_tbl: iscsi cid to conn structure mapping table
319 *
320 * Per adapter iSCSI CID Queue
321 */
322 struct iscsi_cid_queue {
323 void *cid_que_base;
324 u32 *cid_que;
325 u32 cid_q_prod_idx;
326 u32 cid_q_cons_idx;
327 u32 cid_q_max_idx;
328 u32 cid_free_cnt;
329 struct bnx2i_conn **conn_cid_tbl;
330 };
331
332
333 struct bnx2i_stats_info {
334 u64 rx_pdus;
335 u64 rx_bytes;
336 u64 tx_pdus;
337 u64 tx_bytes;
338 };
339
340
341 /**
342 * struct bnx2i_hba - bnx2i adapter structure
343 *
344 * @link: list head to link elements
345 * @cnic: pointer to cnic device
346 * @pcidev: pointer to pci dev
347 * @netdev: pointer to netdev structure
348 * @regview: mapped PCI register space
349 * @age: age, incremented by every recovery
350 * @cnic_dev_type: cnic device type, 5706/5708/5709/57710
351 * @mail_queue_access: mailbox queue access mode, applicable to 5709 only
352 * @reg_with_cnic: indicates whether the device is register with CNIC
353 * @adapter_state: adapter state, UP, GOING_DOWN, LINK_DOWN
354 * @mtu_supported: Ethernet MTU supported
355 * @shost: scsi host pointer
356 * @max_sqes: SQ size
357 * @max_rqes: RQ size
358 * @max_cqes: CQ size
359 * @num_ccell: number of command cells per connection
360 * @ofld_conns_active: active connection list
361 * @eh_wait: wait queue for the endpoint to shutdown
362 * @max_active_conns: max offload connections supported by this device
363 * @cid_que: iscsi cid queue
364 * @ep_rdwr_lock: read / write lock to synchronize various ep lists
365 * @ep_ofld_list: connection list for pending offload completion
366 * @ep_active_list: connection list for active offload endpoints
367 * @ep_destroy_list: connection list for pending offload completion
368 * @mp_bd_tbl: BD table to be used with middle path requests
369 * @mp_bd_dma: DMA address of 'mp_bd_tbl' memory buffer
370 * @dummy_buffer: Dummy buffer to be used with zero length scsicmd reqs
371 * @dummy_buf_dma: DMA address of 'dummy_buffer' memory buffer
372 * @lock: lock to synchonize access to hba structure
373 * @hba_shutdown_tmo: Timeout value to shutdown each connection
374 * @conn_teardown_tmo: Timeout value to tear down each connection
375 * @conn_ctx_destroy_tmo: Timeout value to destroy context of each connection
376 * @pci_did: PCI device ID
377 * @pci_vid: PCI vendor ID
378 * @pci_sdid: PCI subsystem device ID
379 * @pci_svid: PCI subsystem vendor ID
380 * @pci_func: PCI function number in system pci tree
381 * @pci_devno: PCI device number in system pci tree
382 * @num_wqe_sent: statistic counter, total wqe's sent
383 * @num_cqe_rcvd: statistic counter, total cqe's received
384 * @num_intr_claimed: statistic counter, total interrupts claimed
385 * @link_changed_count: statistic counter, num of link change notifications
386 * received
387 * @ipaddr_changed_count: statistic counter, num times IP address changed while
388 * at least one connection is offloaded
389 * @num_sess_opened: statistic counter, total num sessions opened
390 * @num_conn_opened: statistic counter, total num conns opened on this hba
391 * @ctx_ccell_tasks: captures number of ccells and tasks supported by
392 * currently offloaded connection, used to decode
393 * context memory
394 * @stat_lock: spin lock used by the statistic collector (32 bit)
395 * @stats: local iSCSI statistic collection place holder
396 *
397 * Adapter Data Structure
398 */
399 struct bnx2i_hba {
400 struct list_head link;
401 struct cnic_dev *cnic;
402 struct pci_dev *pcidev;
403 struct net_device *netdev;
404 void __iomem *regview;
405 resource_size_t reg_base;
406
407 u32 age;
408 unsigned long cnic_dev_type;
409 #define BNX2I_NX2_DEV_5706 0x0
410 #define BNX2I_NX2_DEV_5708 0x1
411 #define BNX2I_NX2_DEV_5709 0x2
412 #define BNX2I_NX2_DEV_57710 0x3
413 u32 mail_queue_access;
414 #define BNX2I_MQ_KERNEL_MODE 0x0
415 #define BNX2I_MQ_KERNEL_BYPASS_MODE 0x1
416 #define BNX2I_MQ_BIN_MODE 0x2
417 unsigned long reg_with_cnic;
418 #define BNX2I_CNIC_REGISTERED 1
419
420 unsigned long adapter_state;
421 #define ADAPTER_STATE_UP 0
422 #define ADAPTER_STATE_GOING_DOWN 1
423 #define ADAPTER_STATE_LINK_DOWN 2
424 #define ADAPTER_STATE_INIT_FAILED 31
425 unsigned int mtu_supported;
426 #define BNX2I_MAX_MTU_SUPPORTED 9000
427
428 struct Scsi_Host *shost;
429
430 u32 max_sqes;
431 u32 max_rqes;
432 u32 max_cqes;
433 u32 num_ccell;
434
435 int ofld_conns_active;
436 wait_queue_head_t eh_wait;
437
438 int max_active_conns;
439 struct iscsi_cid_queue cid_que;
440
441 rwlock_t ep_rdwr_lock;
442 struct list_head ep_ofld_list;
443 struct list_head ep_active_list;
444 struct list_head ep_destroy_list;
445
446 /*
447 * BD table to be used with MP (Middle Path requests.
448 */
449 char *mp_bd_tbl;
450 dma_addr_t mp_bd_dma;
451 char *dummy_buffer;
452 dma_addr_t dummy_buf_dma;
453
454 spinlock_t lock; /* protects hba structure access */
455 struct mutex net_dev_lock;/* sync net device access */
456
457 int hba_shutdown_tmo;
458 int conn_teardown_tmo;
459 int conn_ctx_destroy_tmo;
460 /*
461 * PCI related info.
462 */
463 u16 pci_did;
464 u16 pci_vid;
465 u16 pci_sdid;
466 u16 pci_svid;
467 u16 pci_func;
468 u16 pci_devno;
469
470 /*
471 * Following are a bunch of statistics useful during development
472 * and later stage for score boarding.
473 */
474 u32 num_wqe_sent;
475 u32 num_cqe_rcvd;
476 u32 num_intr_claimed;
477 u32 link_changed_count;
478 u32 ipaddr_changed_count;
479 u32 num_sess_opened;
480 u32 num_conn_opened;
481 unsigned int ctx_ccell_tasks;
482
483 #ifdef CONFIG_32BIT
484 spinlock_t stat_lock;
485 #endif
486 struct bnx2i_stats_info bnx2i_stats;
487 struct iscsi_stats_info stats;
488 };
489
490
491 /*******************************************************************************
492 * QP [ SQ / RQ / CQ ] info.
493 ******************************************************************************/
494
495 /*
496 * SQ/RQ/CQ generic structure definition
497 */
498 struct sqe {
499 u8 sqe_byte[BNX2I_SQ_WQE_SIZE];
500 };
501
502 struct rqe {
503 u8 rqe_byte[BNX2I_RQ_WQE_SIZE];
504 };
505
506 struct cqe {
507 u8 cqe_byte[BNX2I_CQE_SIZE];
508 };
509
510
511 enum {
512 #if defined(__LITTLE_ENDIAN)
513 CNIC_EVENT_COAL_INDEX = 0x0,
514 CNIC_SEND_DOORBELL = 0x4,
515 CNIC_EVENT_CQ_ARM = 0x7,
516 CNIC_RECV_DOORBELL = 0x8
517 #elif defined(__BIG_ENDIAN)
518 CNIC_EVENT_COAL_INDEX = 0x2,
519 CNIC_SEND_DOORBELL = 0x6,
520 CNIC_EVENT_CQ_ARM = 0x4,
521 CNIC_RECV_DOORBELL = 0xa
522 #endif
523 };
524
525
526 /*
527 * CQ DB
528 */
529 struct bnx2x_iscsi_cq_pend_cmpl {
530 /* CQ producer, updated by Ustorm */
531 u16 ustrom_prod;
532 /* CQ pending completion counter */
533 u16 pend_cntr;
534 };
535
536
537 struct bnx2i_5771x_cq_db {
538 struct bnx2x_iscsi_cq_pend_cmpl qp_pend_cmpl[BNX2X_MAX_CQS];
539 /* CQ pending completion ITT array */
540 u16 itt[BNX2X_MAX_CQS];
541 /* Cstorm CQ sequence to notify array, updated by driver */;
542 u16 sqn[BNX2X_MAX_CQS];
543 u32 reserved[4] /* 16 byte allignment */;
544 };
545
546
547 struct bnx2i_5771x_sq_rq_db {
548 u16 prod_idx;
549 u8 reserved0[62]; /* Pad structure size to 64 bytes */
550 };
551
552
553 struct bnx2i_5771x_dbell_hdr {
554 u8 header;
555 /* 1 for rx doorbell, 0 for tx doorbell */
556 #define B577XX_DOORBELL_HDR_RX (0x1<<0)
557 #define B577XX_DOORBELL_HDR_RX_SHIFT 0
558 /* 0 for normal doorbell, 1 for advertise wnd doorbell */
559 #define B577XX_DOORBELL_HDR_DB_TYPE (0x1<<1)
560 #define B577XX_DOORBELL_HDR_DB_TYPE_SHIFT 1
561 /* rdma tx only: DPM transaction size specifier (64/128/256/512B) */
562 #define B577XX_DOORBELL_HDR_DPM_SIZE (0x3<<2)
563 #define B577XX_DOORBELL_HDR_DPM_SIZE_SHIFT 2
564 /* connection type */
565 #define B577XX_DOORBELL_HDR_CONN_TYPE (0xF<<4)
566 #define B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT 4
567 };
568
569 struct bnx2i_5771x_dbell {
570 struct bnx2i_5771x_dbell_hdr dbell;
571 u8 pad[3];
572
573 };
574
575 /**
576 * struct qp_info - QP (share queue region) atrributes structure
577 *
578 * @ctx_base: ioremapped pci register base to access doorbell register
579 * pertaining to this offloaded connection
580 * @sq_virt: virtual address of send queue (SQ) region
581 * @sq_phys: DMA address of SQ memory region
582 * @sq_mem_size: SQ size
583 * @sq_prod_qe: SQ producer entry pointer
584 * @sq_cons_qe: SQ consumer entry pointer
585 * @sq_first_qe: virtual address of first entry in SQ
586 * @sq_last_qe: virtual address of last entry in SQ
587 * @sq_prod_idx: SQ producer index
588 * @sq_cons_idx: SQ consumer index
589 * @sqe_left: number sq entry left
590 * @sq_pgtbl_virt: page table describing buffer consituting SQ region
591 * @sq_pgtbl_phys: dma address of 'sq_pgtbl_virt'
592 * @sq_pgtbl_size: SQ page table size
593 * @cq_virt: virtual address of completion queue (CQ) region
594 * @cq_phys: DMA address of RQ memory region
595 * @cq_mem_size: CQ size
596 * @cq_prod_qe: CQ producer entry pointer
597 * @cq_cons_qe: CQ consumer entry pointer
598 * @cq_first_qe: virtual address of first entry in CQ
599 * @cq_last_qe: virtual address of last entry in CQ
600 * @cq_prod_idx: CQ producer index
601 * @cq_cons_idx: CQ consumer index
602 * @cqe_left: number cq entry left
603 * @cqe_size: size of each CQ entry
604 * @cqe_exp_seq_sn: next expected CQE sequence number
605 * @cq_pgtbl_virt: page table describing buffer consituting CQ region
606 * @cq_pgtbl_phys: dma address of 'cq_pgtbl_virt'
607 * @cq_pgtbl_size: CQ page table size
608 * @rq_virt: virtual address of receive queue (RQ) region
609 * @rq_phys: DMA address of RQ memory region
610 * @rq_mem_size: RQ size
611 * @rq_prod_qe: RQ producer entry pointer
612 * @rq_cons_qe: RQ consumer entry pointer
613 * @rq_first_qe: virtual address of first entry in RQ
614 * @rq_last_qe: virtual address of last entry in RQ
615 * @rq_prod_idx: RQ producer index
616 * @rq_cons_idx: RQ consumer index
617 * @rqe_left: number rq entry left
618 * @rq_pgtbl_virt: page table describing buffer consituting RQ region
619 * @rq_pgtbl_phys: dma address of 'rq_pgtbl_virt'
620 * @rq_pgtbl_size: RQ page table size
621 *
622 * queue pair (QP) is a per connection shared data structure which is used
623 * to send work requests (SQ), receive completion notifications (CQ)
624 * and receive asynchoronous / scsi sense info (RQ). 'qp_info' structure
625 * below holds queue memory, consumer/producer indexes and page table
626 * information
627 */
628 struct qp_info {
629 void __iomem *ctx_base;
630 #define DPM_TRIGER_TYPE 0x40
631
632 #define BNX2I_570x_QUE_DB_SIZE 0
633 #define BNX2I_5771x_QUE_DB_SIZE 16
634 struct sqe *sq_virt;
635 dma_addr_t sq_phys;
636 u32 sq_mem_size;
637
638 struct sqe *sq_prod_qe;
639 struct sqe *sq_cons_qe;
640 struct sqe *sq_first_qe;
641 struct sqe *sq_last_qe;
642 u16 sq_prod_idx;
643 u16 sq_cons_idx;
644 u32 sqe_left;
645
646 void *sq_pgtbl_virt;
647 dma_addr_t sq_pgtbl_phys;
648 u32 sq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */
649
650 struct cqe *cq_virt;
651 dma_addr_t cq_phys;
652 u32 cq_mem_size;
653
654 struct cqe *cq_prod_qe;
655 struct cqe *cq_cons_qe;
656 struct cqe *cq_first_qe;
657 struct cqe *cq_last_qe;
658 u16 cq_prod_idx;
659 u16 cq_cons_idx;
660 u32 cqe_left;
661 u32 cqe_size;
662 u32 cqe_exp_seq_sn;
663
664 void *cq_pgtbl_virt;
665 dma_addr_t cq_pgtbl_phys;
666 u32 cq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */
667
668 struct rqe *rq_virt;
669 dma_addr_t rq_phys;
670 u32 rq_mem_size;
671
672 struct rqe *rq_prod_qe;
673 struct rqe *rq_cons_qe;
674 struct rqe *rq_first_qe;
675 struct rqe *rq_last_qe;
676 u16 rq_prod_idx;
677 u16 rq_cons_idx;
678 u32 rqe_left;
679
680 void *rq_pgtbl_virt;
681 dma_addr_t rq_pgtbl_phys;
682 u32 rq_pgtbl_size; /* set to PAGE_SIZE for 5708 & 5709 */
683 };
684
685
686
687 /*
688 * CID handles
689 */
690 struct ep_handles {
691 u32 fw_cid;
692 u32 drv_iscsi_cid;
693 u16 pg_cid;
694 u16 rsvd;
695 };
696
697
698 enum {
699 EP_STATE_IDLE = 0x0,
700 EP_STATE_PG_OFLD_START = 0x1,
701 EP_STATE_PG_OFLD_COMPL = 0x2,
702 EP_STATE_OFLD_START = 0x4,
703 EP_STATE_OFLD_COMPL = 0x8,
704 EP_STATE_CONNECT_START = 0x10,
705 EP_STATE_CONNECT_COMPL = 0x20,
706 EP_STATE_ULP_UPDATE_START = 0x40,
707 EP_STATE_ULP_UPDATE_COMPL = 0x80,
708 EP_STATE_DISCONN_START = 0x100,
709 EP_STATE_DISCONN_COMPL = 0x200,
710 EP_STATE_CLEANUP_START = 0x400,
711 EP_STATE_CLEANUP_CMPL = 0x800,
712 EP_STATE_TCP_FIN_RCVD = 0x1000,
713 EP_STATE_TCP_RST_RCVD = 0x2000,
714 EP_STATE_LOGOUT_SENT = 0x4000,
715 EP_STATE_LOGOUT_RESP_RCVD = 0x8000,
716 EP_STATE_PG_OFLD_FAILED = 0x1000000,
717 EP_STATE_ULP_UPDATE_FAILED = 0x2000000,
718 EP_STATE_CLEANUP_FAILED = 0x4000000,
719 EP_STATE_OFLD_FAILED = 0x8000000,
720 EP_STATE_CONNECT_FAILED = 0x10000000,
721 EP_STATE_DISCONN_TIMEDOUT = 0x20000000,
722 EP_STATE_OFLD_FAILED_CID_BUSY = 0x80000000,
723 };
724
725 /**
726 * struct bnx2i_endpoint - representation of tcp connection in NX2 world
727 *
728 * @link: list head to link elements
729 * @hba: adapter to which this connection belongs
730 * @conn: iscsi connection this EP is linked to
731 * @cls_ep: associated iSCSI endpoint pointer
732 * @cm_sk: cnic sock struct
733 * @hba_age: age to detect if 'iscsid' issues ep_disconnect()
734 * after HBA reset is completed by bnx2i/cnic/bnx2
735 * modules
736 * @state: tracks offload connection state machine
737 * @timestamp: tracks the start time when the ep begins to connect
738 * @num_active_cmds: tracks the number of outstanding commands for this ep
739 * @ec_shift: the amount of shift as part of the event coal calc
740 * @qp: QP information
741 * @ids: contains chip allocated *context id* & driver assigned
742 * *iscsi cid*
743 * @ofld_timer: offload timer to detect timeout
744 * @ofld_wait: wait queue
745 *
746 * Endpoint Structure - equivalent of tcp socket structure
747 */
748 struct bnx2i_endpoint {
749 struct list_head link;
750 struct bnx2i_hba *hba;
751 struct bnx2i_conn *conn;
752 struct iscsi_endpoint *cls_ep;
753 struct cnic_sock *cm_sk;
754 u32 hba_age;
755 u32 state;
756 unsigned long timestamp;
757 atomic_t num_active_cmds;
758 u32 ec_shift;
759
760 struct qp_info qp;
761 struct ep_handles ids;
762 #define ep_iscsi_cid ids.drv_iscsi_cid
763 #define ep_cid ids.fw_cid
764 #define ep_pg_cid ids.pg_cid
765 struct timer_list ofld_timer;
766 wait_queue_head_t ofld_wait;
767 };
768
769
770 struct bnx2i_work {
771 struct list_head list;
772 struct iscsi_session *session;
773 struct bnx2i_conn *bnx2i_conn;
774 struct cqe cqe;
775 };
776
777 struct bnx2i_percpu_s {
778 struct task_struct *iothread;
779 struct list_head work_list;
780 spinlock_t p_work_lock;
781 };
782
783
784 /* Global variables */
785 extern unsigned int error_mask1, error_mask2;
786 extern u64 iscsi_error_mask;
787 extern unsigned int en_tcp_dack;
788 extern unsigned int event_coal_div;
789 extern unsigned int event_coal_min;
790
791 extern struct scsi_transport_template *bnx2i_scsi_xport_template;
792 extern struct iscsi_transport bnx2i_iscsi_transport;
793 extern struct cnic_ulp_ops bnx2i_cnic_cb;
794
795 extern unsigned int sq_size;
796 extern unsigned int rq_size;
797
798 extern struct device_attribute *bnx2i_dev_attributes[];
799
800
801
802 /*
803 * Function Prototypes
804 */
805 extern void bnx2i_identify_device(struct bnx2i_hba *hba, struct cnic_dev *dev);
806
807 extern void bnx2i_ulp_init(struct cnic_dev *dev);
808 extern void bnx2i_ulp_exit(struct cnic_dev *dev);
809 extern void bnx2i_start(void *handle);
810 extern void bnx2i_stop(void *handle);
811 extern int bnx2i_get_stats(void *handle);
812
813 extern struct bnx2i_hba *get_adapter_list_head(void);
814
815 struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
816 u16 iscsi_cid);
817
818 int bnx2i_alloc_ep_pool(void);
819 void bnx2i_release_ep_pool(void);
820 struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba);
821 struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba);
822
823 struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic);
824
825 struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic);
826 void bnx2i_free_hba(struct bnx2i_hba *hba);
827
828 void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len);
829 void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count);
830
831 void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd);
832
833 void bnx2i_drop_session(struct iscsi_cls_session *session);
834
835 extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba);
836 extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn,
837 struct iscsi_task *mtask);
838 extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn,
839 struct iscsi_task *mtask);
840 extern int bnx2i_send_iscsi_text(struct bnx2i_conn *conn,
841 struct iscsi_task *mtask);
842 extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn,
843 struct bnx2i_cmd *cmnd);
844 extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn,
845 struct iscsi_task *mtask,
846 char *datap, int data_len, int unsol);
847 extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn,
848 struct iscsi_task *mtask);
849 extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba,
850 struct bnx2i_cmd *cmd);
851 extern int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba,
852 struct bnx2i_endpoint *ep);
853 extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn);
854 extern int bnx2i_send_conn_destroy(struct bnx2i_hba *hba,
855 struct bnx2i_endpoint *ep);
856
857 extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba,
858 struct bnx2i_endpoint *ep);
859 extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba,
860 struct bnx2i_endpoint *ep);
861 extern void bnx2i_ep_ofld_timer(struct timer_list *t);
862 extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list(
863 struct bnx2i_hba *hba, u32 iscsi_cid);
864 extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list(
865 struct bnx2i_hba *hba, u32 iscsi_cid);
866
867 extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep);
868 extern int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action);
869
870 extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep);
871
872 /* Debug related function prototypes */
873 extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn);
874 extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn);
875 extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn);
876 extern void bnx2i_print_recv_state(struct bnx2i_conn *conn);
877
878 extern int bnx2i_percpu_io_thread(void *arg);
879 extern int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
880 struct bnx2i_conn *bnx2i_conn,
881 struct cqe *cqe);
882 #endif