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/drivers/scsi/bnx2i/bnx2i.h

http://github.com/mirrors/linux
C Header | 882 lines | 479 code | 126 blank | 277 comment | 6 complexity | 0c213974de0d240091a1561307173b8c MD5 | raw file
  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 */
195struct 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 */
222struct 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 */
239struct 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 */
257struct 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 */
283struct 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 */
322struct 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
333struct 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 */
399struct 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 */
498struct 	sqe {
499	u8 sqe_byte[BNX2I_SQ_WQE_SIZE];
500};
501
502struct 	rqe {
503	u8 rqe_byte[BNX2I_RQ_WQE_SIZE];
504};
505
506struct 	cqe {
507	u8 cqe_byte[BNX2I_CQE_SIZE];
508};
509
510
511enum {
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 */
529struct 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
537struct 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
547struct bnx2i_5771x_sq_rq_db {
548	u16 prod_idx;
549	u8 reserved0[62]; /* Pad structure size to 64 bytes */
550};
551
552
553struct 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
569struct 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 */
628struct 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 */
690struct ep_handles {
691	u32 fw_cid;
692	u32 drv_iscsi_cid;
693	u16 pg_cid;
694	u16 rsvd;
695};
696
697
698enum {
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 */
748struct 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
770struct bnx2i_work {
771	struct list_head list;
772	struct iscsi_session *session;
773	struct bnx2i_conn *bnx2i_conn;
774	struct cqe cqe;
775};
776
777struct 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 */
785extern unsigned int error_mask1, error_mask2;
786extern u64 iscsi_error_mask;
787extern unsigned int en_tcp_dack;
788extern unsigned int event_coal_div;
789extern unsigned int event_coal_min;
790
791extern struct scsi_transport_template *bnx2i_scsi_xport_template;
792extern struct iscsi_transport bnx2i_iscsi_transport;
793extern struct cnic_ulp_ops bnx2i_cnic_cb;
794
795extern unsigned int sq_size;
796extern unsigned int rq_size;
797
798extern struct device_attribute *bnx2i_dev_attributes[];
799
800
801
802/*
803 * Function Prototypes
804 */
805extern void bnx2i_identify_device(struct bnx2i_hba *hba, struct cnic_dev *dev);
806
807extern void bnx2i_ulp_init(struct cnic_dev *dev);
808extern void bnx2i_ulp_exit(struct cnic_dev *dev);
809extern void bnx2i_start(void *handle);
810extern void bnx2i_stop(void *handle);
811extern int bnx2i_get_stats(void *handle);
812
813extern struct bnx2i_hba *get_adapter_list_head(void);
814
815struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba,
816					  u16 iscsi_cid);
817
818int bnx2i_alloc_ep_pool(void);
819void bnx2i_release_ep_pool(void);
820struct bnx2i_endpoint *bnx2i_ep_ofld_list_next(struct bnx2i_hba *hba);
821struct bnx2i_endpoint *bnx2i_ep_destroy_list_next(struct bnx2i_hba *hba);
822
823struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic);
824
825struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic);
826void bnx2i_free_hba(struct bnx2i_hba *hba);
827
828void bnx2i_get_rq_buf(struct bnx2i_conn *conn, char *ptr, int len);
829void bnx2i_put_rq_buf(struct bnx2i_conn *conn, int count);
830
831void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd);
832
833void bnx2i_drop_session(struct iscsi_cls_session *session);
834
835extern int bnx2i_send_fw_iscsi_init_msg(struct bnx2i_hba *hba);
836extern int bnx2i_send_iscsi_login(struct bnx2i_conn *conn,
837				  struct iscsi_task *mtask);
838extern int bnx2i_send_iscsi_tmf(struct bnx2i_conn *conn,
839				  struct iscsi_task *mtask);
840extern int bnx2i_send_iscsi_text(struct bnx2i_conn *conn,
841				 struct iscsi_task *mtask);
842extern int bnx2i_send_iscsi_scsicmd(struct bnx2i_conn *conn,
843				    struct bnx2i_cmd *cmnd);
844extern int bnx2i_send_iscsi_nopout(struct bnx2i_conn *conn,
845				   struct iscsi_task *mtask,
846				   char *datap, int data_len, int unsol);
847extern int bnx2i_send_iscsi_logout(struct bnx2i_conn *conn,
848				   struct iscsi_task *mtask);
849extern void bnx2i_send_cmd_cleanup_req(struct bnx2i_hba *hba,
850				       struct bnx2i_cmd *cmd);
851extern int bnx2i_send_conn_ofld_req(struct bnx2i_hba *hba,
852				    struct bnx2i_endpoint *ep);
853extern void bnx2i_update_iscsi_conn(struct iscsi_conn *conn);
854extern int bnx2i_send_conn_destroy(struct bnx2i_hba *hba,
855				   struct bnx2i_endpoint *ep);
856
857extern int bnx2i_alloc_qp_resc(struct bnx2i_hba *hba,
858			       struct bnx2i_endpoint *ep);
859extern void bnx2i_free_qp_resc(struct bnx2i_hba *hba,
860			       struct bnx2i_endpoint *ep);
861extern void bnx2i_ep_ofld_timer(struct timer_list *t);
862extern struct bnx2i_endpoint *bnx2i_find_ep_in_ofld_list(
863		struct bnx2i_hba *hba, u32 iscsi_cid);
864extern struct bnx2i_endpoint *bnx2i_find_ep_in_destroy_list(
865		struct bnx2i_hba *hba, u32 iscsi_cid);
866
867extern int bnx2i_map_ep_dbell_regs(struct bnx2i_endpoint *ep);
868extern int bnx2i_arm_cq_event_coalescing(struct bnx2i_endpoint *ep, u8 action);
869
870extern int bnx2i_hw_ep_disconnect(struct bnx2i_endpoint *bnx2i_ep);
871
872/* Debug related function prototypes */
873extern void bnx2i_print_pend_cmd_queue(struct bnx2i_conn *conn);
874extern void bnx2i_print_active_cmd_queue(struct bnx2i_conn *conn);
875extern void bnx2i_print_xmit_pdu_queue(struct bnx2i_conn *conn);
876extern void bnx2i_print_recv_state(struct bnx2i_conn *conn);
877
878extern int bnx2i_percpu_io_thread(void *arg);
879extern int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
880				       struct bnx2i_conn *bnx2i_conn,
881				       struct cqe *cqe);
882#endif