[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / bfa / bfa_fcpim.h

/*
 * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
 * All rights reserved
 * www.brocade.com
 *
 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (GPL) Version 2 as
 * published by the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

#ifndef __BFA_FCPIM_H__
#define __BFA_FCPIM_H__

#include "bfa.h"
#include "bfa_svc.h"
#include "bfi_ms.h"
#include "bfa_defs_svc.h"
#include "bfa_cs.h"

/* FCP module related definitions */
#define BFA_IO_MAX	2000
#define BFA_FWTIO_MAX	0

struct bfa_fcp_mod_s;
struct bfa_iotag_s {
	struct list_head	qe;	/* queue element	*/
	u16	tag;			/* FW IO tag		*/
};

struct bfa_itn_s {
	bfa_isr_func_t isr;
};

void bfa_itn_create(struct bfa_s *bfa, struct bfa_rport_s *rport,
		void (*isr)(struct bfa_s *bfa, struct bfi_msg_s *m));
void bfa_itn_isr(struct bfa_s *bfa, struct bfi_msg_s *m);
void bfa_iotag_attach(struct bfa_fcp_mod_s *fcp, struct bfa_meminfo_s *minfo);

#define BFA_FCP_MOD(_hal)	(&(_hal)->modules.fcp_mod)
#define BFA_IOTAG_FROM_TAG(_fcp, _tag)	\
	(&(_fcp)->iotag_arr[(_tag & BFA_IOIM_IOTAG_MASK)])
#define BFA_ITN_FROM_TAG(_fcp, _tag)	\
	((_fcp)->itn_arr + ((_tag) & ((_fcp)->num_itns - 1)))
#define BFA_SNSINFO_FROM_TAG(_fcp, _tag) \
	(((u8 *)(_fcp)->snsbase.kva) + (_tag * BFI_IOIM_SNSLEN))

#define BFA_ITNIM_MIN   32
#define BFA_ITNIM_MAX   1024

#define BFA_IOIM_MIN	8
#define BFA_IOIM_MAX	2000

#define BFA_TSKIM_MIN   4
#define BFA_TSKIM_MAX   512
#define BFA_FCPIM_PATHTOV_DEF	(30 * 1000)	/* in millisecs */
#define BFA_FCPIM_PATHTOV_MAX	(90 * 1000)	/* in millisecs */


#define bfa_itnim_ioprofile_update(__itnim, __index)			\
	(__itnim->ioprofile.iocomps[__index]++)

#define BFA_IOIM_RETRY_TAG_OFFSET 11
#define BFA_IOIM_IOTAG_MASK 0x07ff /* 2K IOs */
#define BFA_IOIM_RETRY_MAX 7

/* Buckets are are 512 bytes to 2MB */
static inline u32
bfa_ioim_get_index(u32 n) {
	int pos = 0;
	if (n >= (1UL)<<22)
		return BFA_IOBUCKET_MAX - 1;
	n >>= 8;
	if (n >= (1UL)<<16)
		n >>= 16; pos += 16;
	if (n >= 1 << 8)
		n >>= 8; pos += 8;
	if (n >= 1 << 4)
		n >>= 4; pos += 4;
	if (n >= 1 << 2)
		n >>= 2; pos += 2;
	if (n >= 1 << 1)
		pos += 1;

	return (n == 0) ? (0) : pos;
}

/*
 * forward declarations
 */
struct bfa_ioim_s;
struct bfa_tskim_s;
struct bfad_ioim_s;
struct bfad_tskim_s;

typedef void    (*bfa_fcpim_profile_t) (struct bfa_ioim_s *ioim);

struct bfa_fcpim_s {
	struct bfa_s		*bfa;
	struct bfa_fcp_mod_s	*fcp;
	struct bfa_itnim_s	*itnim_arr;
	struct bfa_ioim_s	*ioim_arr;
	struct bfa_ioim_sp_s	*ioim_sp_arr;
	struct bfa_tskim_s	*tskim_arr;
	int			num_itnims;
	int			num_tskim_reqs;
	u32			path_tov;
	u16			q_depth;
	u8			reqq;		/*  Request queue to be used */
	u8			rsvd;
	struct list_head	itnim_q;	/*  queue of active itnim */
	struct list_head	ioim_resfree_q; /*  IOs waiting for f/w */
	struct list_head	ioim_comp_q;	/*  IO global comp Q	*/
	struct list_head	tskim_free_q;
	u32			ios_active;	/*  current active IOs	*/
	u32			delay_comp;
	struct bfa_fcpim_del_itn_stats_s del_itn_stats;
	bfa_boolean_t		ioredirect;
	bfa_boolean_t		io_profile;
	u32			io_profile_start_time;
	bfa_fcpim_profile_t     profile_comp;
	bfa_fcpim_profile_t     profile_start;
};

struct bfa_fcp_mod_s {
	struct bfa_s		*bfa;
	struct list_head	iotag_ioim_free_q;	/* free IO resources */
	struct list_head	iotag_tio_free_q;	/* free IO resources */
	struct bfa_iotag_s	*iotag_arr;
	struct bfa_itn_s	*itn_arr;
	int			num_ioim_reqs;
	int			num_fwtio_reqs;
	int			num_itns;
	struct bfa_dma_s	snsbase;
	struct bfa_fcpim_s	fcpim;
};

/*
 * BFA IO (initiator mode)
 */
struct bfa_ioim_s {
	struct list_head	qe;		/*  queue elememt	*/
	bfa_sm_t		sm;		/*  BFA ioim state machine */
	struct bfa_s		*bfa;		/*  BFA module	*/
	struct bfa_fcpim_s	*fcpim;		/*  parent fcpim module */
	struct bfa_itnim_s	*itnim;		/*  i-t-n nexus for this IO  */
	struct bfad_ioim_s	*dio;		/*  driver IO handle	*/
	u16			iotag;		/*  FWI IO tag	*/
	u16			abort_tag;	/*  unqiue abort request tag */
	u16			nsges;		/*  number of SG elements */
	u16			nsgpgs;		/*  number of SG pages	*/
	struct bfa_sgpg_s	*sgpg;		/*  first SG page	*/
	struct list_head	sgpg_q;		/*  allocated SG pages	*/
	struct bfa_cb_qe_s	hcb_qe;		/*  bfa callback qelem	*/
	bfa_cb_cbfn_t		io_cbfn;	/*  IO completion handler */
	struct bfa_ioim_sp_s	*iosp;		/*  slow-path IO handling */
	u8			reqq;		/*  Request queue for I/O */
	u64			start_time;	/*  IO's Profile start val */
};

struct bfa_ioim_sp_s {
	struct bfi_msg_s	comp_rspmsg;	/*  IO comp f/w response */
	struct bfa_sgpg_wqe_s	sgpg_wqe;	/*  waitq elem for sgpg	*/
	struct bfa_reqq_wait_s	reqq_wait;	/*  to wait for room in reqq */
	bfa_boolean_t		abort_explicit;	/*  aborted by OS	*/
	struct bfa_tskim_s	*tskim;		/*  Relevant TM cmd	*/
};

/*
 * BFA Task management command (initiator mode)
 */
struct bfa_tskim_s {
	struct list_head	qe;
	bfa_sm_t		sm;
	struct bfa_s		*bfa;	/*  BFA module  */
	struct bfa_fcpim_s	*fcpim;	/*  parent fcpim module	*/
	struct bfa_itnim_s	*itnim;	/*  i-t-n nexus for this IO  */
	struct bfad_tskim_s	*dtsk;  /*  driver task mgmt cmnd	*/
	bfa_boolean_t		notify;	/*  notify itnim on TM comp  */
	struct scsi_lun		lun;	/*  lun if applicable	*/
	enum fcp_tm_cmnd	tm_cmnd; /*  task management command  */
	u16			tsk_tag; /*  FWI IO tag	*/
	u8			tsecs;	/*  timeout in seconds	*/
	struct bfa_reqq_wait_s  reqq_wait;   /*  to wait for room in reqq */
	struct list_head	io_q;	/*  queue of affected IOs	*/
	struct bfa_wc_s		wc;	/*  waiting counter	*/
	struct bfa_cb_qe_s	hcb_qe;	/*  bfa callback qelem	*/
	enum bfi_tskim_status   tsk_status;  /*  TM status	*/
};

/*
 * BFA i-t-n (initiator mode)
 */
struct bfa_itnim_s {
	struct list_head	qe;	/*  queue element	*/
	bfa_sm_t		sm;	/*  i-t-n im BFA state machine  */
	struct bfa_s		*bfa;	/*  bfa instance	*/
	struct bfa_rport_s	*rport;	/*  bfa rport	*/
	void			*ditn;	/*  driver i-t-n structure	*/
	struct bfi_mhdr_s	mhdr;	/*  pre-built mhdr	*/
	u8			msg_no;	/*  itnim/rport firmware handle */
	u8			reqq;	/*  CQ for requests	*/
	struct bfa_cb_qe_s	hcb_qe;	/*  bfa callback qelem	*/
	struct list_head pending_q;	/*  queue of pending IO requests */
	struct list_head io_q;		/*  queue of active IO requests */
	struct list_head io_cleanup_q;	/*  IO being cleaned up	*/
	struct list_head tsk_q;		/*  queue of active TM commands */
	struct list_head  delay_comp_q; /*  queue of failed inflight cmds */
	bfa_boolean_t   seq_rec;	/*  SQER supported	*/
	bfa_boolean_t   is_online;	/*  itnim is ONLINE for IO	*/
	bfa_boolean_t   iotov_active;	/*  IO TOV timer is active	 */
	struct bfa_wc_s	wc;		/*  waiting counter	*/
	struct bfa_timer_s timer;	/*  pending IO TOV	 */
	struct bfa_reqq_wait_s reqq_wait; /*  to wait for room in reqq */
	struct bfa_fcpim_s *fcpim;	/*  fcpim module	*/
	struct bfa_itnim_iostats_s	stats;
	struct bfa_itnim_ioprofile_s  ioprofile;
};

#define bfa_itnim_is_online(_itnim) ((_itnim)->is_online)
#define BFA_FCPIM(_hal)	(&(_hal)->modules.fcp_mod.fcpim)
#define BFA_IOIM_TAG_2_ID(_iotag)	((_iotag) & BFA_IOIM_IOTAG_MASK)
#define BFA_IOIM_FROM_TAG(_fcpim, _iotag)	\
	(&fcpim->ioim_arr[(_iotag & BFA_IOIM_IOTAG_MASK)])
#define BFA_TSKIM_FROM_TAG(_fcpim, _tmtag)	\
	(&fcpim->tskim_arr[_tmtag & (fcpim->num_tskim_reqs - 1)])

#define bfa_io_profile_start_time(_bfa)	\
	((_bfa)->modules.fcp_mod.fcpim.io_profile_start_time)
#define bfa_fcpim_get_io_profile(_bfa)	\
	((_bfa)->modules.fcp_mod.fcpim.io_profile)
#define bfa_ioim_update_iotag(__ioim) do {				\
	uint16_t k = (__ioim)->iotag >> BFA_IOIM_RETRY_TAG_OFFSET;	\
	k++; (__ioim)->iotag &= BFA_IOIM_IOTAG_MASK;			\
	(__ioim)->iotag |= k << BFA_IOIM_RETRY_TAG_OFFSET;		\
} while (0)

static inline bfa_boolean_t
bfa_ioim_maxretry_reached(struct bfa_ioim_s *ioim)
{
	uint16_t k = ioim->iotag >> BFA_IOIM_RETRY_TAG_OFFSET;
	if (k < BFA_IOIM_RETRY_MAX)
		return BFA_FALSE;
	return BFA_TRUE;
}

/*
 * function prototypes
 */
void	bfa_ioim_attach(struct bfa_fcpim_s *fcpim,
					struct bfa_meminfo_s *minfo);
void	bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
void	bfa_ioim_good_comp_isr(struct bfa_s *bfa,
					struct bfi_msg_s *msg);
void	bfa_ioim_cleanup(struct bfa_ioim_s *ioim);
void	bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim,
					struct bfa_tskim_s *tskim);
void	bfa_ioim_iocdisable(struct bfa_ioim_s *ioim);
void	bfa_ioim_tov(struct bfa_ioim_s *ioim);

void	bfa_tskim_attach(struct bfa_fcpim_s *fcpim,
					struct bfa_meminfo_s *minfo);
void	bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
void	bfa_tskim_iodone(struct bfa_tskim_s *tskim);
void	bfa_tskim_iocdisable(struct bfa_tskim_s *tskim);
void	bfa_tskim_cleanup(struct bfa_tskim_s *tskim);

void	bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
					u32 *dm_len);
void	bfa_itnim_attach(struct bfa_fcpim_s *fcpim,
					struct bfa_meminfo_s *minfo);
void	bfa_itnim_iocdisable(struct bfa_itnim_s *itnim);
void	bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
void	bfa_itnim_iodone(struct bfa_itnim_s *itnim);
void	bfa_itnim_tskdone(struct bfa_itnim_s *itnim);
bfa_boolean_t   bfa_itnim_hold_io(struct bfa_itnim_s *itnim);

/*
 * bfa fcpim module API functions
 */
void	bfa_fcpim_path_tov_set(struct bfa_s *bfa, u16 path_tov);
u16	bfa_fcpim_path_tov_get(struct bfa_s *bfa);
u16	bfa_fcpim_qdepth_get(struct bfa_s *bfa);

#define bfa_fcpim_ioredirect_enabled(__bfa)				\
	(((struct bfa_fcpim_s *)(BFA_FCPIM(__bfa)))->ioredirect)

#define bfa_fcpim_get_next_reqq(__bfa, __qid)				\
{									\
	struct bfa_fcpim_s *__fcpim = BFA_FCPIM(__bfa);      \
	__fcpim->reqq++;						\
	__fcpim->reqq &= (BFI_IOC_MAX_CQS - 1);      \
	*(__qid) = __fcpim->reqq;					\
}

#define bfa_iocfc_map_msg_to_qid(__msg, __qid)				\
	*(__qid) = (u8)((__msg) & (BFI_IOC_MAX_CQS - 1));
/*
 * bfa itnim API functions
 */
struct bfa_itnim_s *bfa_itnim_create(struct bfa_s *bfa,
		struct bfa_rport_s *rport, void *itnim);
void bfa_itnim_delete(struct bfa_itnim_s *itnim);
void bfa_itnim_online(struct bfa_itnim_s *itnim, bfa_boolean_t seq_rec);
void bfa_itnim_offline(struct bfa_itnim_s *itnim);
void bfa_itnim_clear_stats(struct bfa_itnim_s *itnim);
bfa_status_t bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim,
			struct bfa_itnim_ioprofile_s *ioprofile);

#define bfa_itnim_get_reqq(__ioim) (((struct bfa_ioim_s *)__ioim)->itnim->reqq)

/*
 * BFA completion callback for bfa_itnim_online().
 */
void	bfa_cb_itnim_online(void *itnim);

/*
 * BFA completion callback for bfa_itnim_offline().
 */
void	bfa_cb_itnim_offline(void *itnim);
void	bfa_cb_itnim_tov_begin(void *itnim);
void	bfa_cb_itnim_tov(void *itnim);

/*
 * BFA notification to FCS/driver for second level error recovery.
 * Atleast one I/O request has timedout and target is unresponsive to
 * repeated abort requests. Second level error recovery should be initiated
 * by starting implicit logout and recovery procedures.
 */
void	bfa_cb_itnim_sler(void *itnim);

/*
 * bfa ioim API functions
 */
struct bfa_ioim_s	*bfa_ioim_alloc(struct bfa_s *bfa,
					struct bfad_ioim_s *dio,
					struct bfa_itnim_s *itnim,
					u16 nsgles);

void		bfa_ioim_free(struct bfa_ioim_s *ioim);
void		bfa_ioim_start(struct bfa_ioim_s *ioim);
bfa_status_t	bfa_ioim_abort(struct bfa_ioim_s *ioim);
void		bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim,
				      bfa_boolean_t iotov);
/*
 * I/O completion notification.
 *
 * @param[in]		dio			driver IO structure
 * @param[in]		io_status		IO completion status
 * @param[in]		scsi_status		SCSI status returned by target
 * @param[in]		sns_len			SCSI sense length, 0 if none
 * @param[in]		sns_info		SCSI sense data, if any
 * @param[in]		residue			Residual length
 *
 * @return None
 */
void bfa_cb_ioim_done(void *bfad, struct bfad_ioim_s *dio,
			enum bfi_ioim_status io_status,
			u8 scsi_status, int sns_len,
			u8 *sns_info, s32 residue);

/*
 * I/O good completion notification.
 */
void bfa_cb_ioim_good_comp(void *bfad, struct bfad_ioim_s *dio);

/*
 * I/O abort completion notification
 */
void bfa_cb_ioim_abort(void *bfad, struct bfad_ioim_s *dio);

/*
 * bfa tskim API functions
 */
struct bfa_tskim_s *bfa_tskim_alloc(struct bfa_s *bfa,
			struct bfad_tskim_s *dtsk);
void bfa_tskim_free(struct bfa_tskim_s *tskim);
void bfa_tskim_start(struct bfa_tskim_s *tskim,
			struct bfa_itnim_s *itnim, struct scsi_lun lun,
			enum fcp_tm_cmnd tm, u8 t_secs);
void bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
			enum bfi_tskim_status tsk_status);

#endif /* __BFA_FCPIM_H__ */
Commit	Line	Data
a36c61f9 KG	1	/*
	2	* Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
	3	* All rights reserved
	4	* www.brocade.com
	5	*
	6	* Linux driver for Brocade Fibre Channel Host Bus Adapter.
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License (GPL) Version 2 as
	10	* published by the Free Software Foundation
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*/
	17
	18	#ifndef __BFA_FCPIM_H__
	19	#define __BFA_FCPIM_H__
	20
	21	#include "bfa.h"
	22	#include "bfa_svc.h"
	23	#include "bfi_ms.h"
	24	#include "bfa_defs_svc.h"
	25	#include "bfa_cs.h"
	26
e2187d7f KG	27	/* FCP module related definitions */
	28	#define BFA_IO_MAX 2000
	29	#define BFA_FWTIO_MAX 0
	30
	31	struct bfa_fcp_mod_s;
	32	struct bfa_iotag_s {
	33	struct list_head qe; /* queue element */
	34	u16 tag; /* FW IO tag */
	35	};
	36
	37	struct bfa_itn_s {
	38	bfa_isr_func_t isr;
	39	};
	40
	41	void bfa_itn_create(struct bfa_s bfa, struct bfa_rport_s rport,
	42	void (isr)(struct bfa_s bfa, struct bfi_msg_s *m));
	43	void bfa_itn_isr(struct bfa_s bfa, struct bfi_msg_s m);
	44	void bfa_iotag_attach(struct bfa_fcp_mod_s fcp, struct bfa_meminfo_s minfo);
	45
	46	#define BFA_FCP_MOD(_hal) (&(_hal)->modules.fcp_mod)
	47	#define BFA_IOTAG_FROM_TAG(_fcp, _tag) \
	48	(&(_fcp)->iotag_arr[(_tag & BFA_IOIM_IOTAG_MASK)])
	49	#define BFA_ITN_FROM_TAG(_fcp, _tag) \
	50	((_fcp)->itn_arr + ((_tag) & ((_fcp)->num_itns - 1)))
	51	#define BFA_SNSINFO_FROM_TAG(_fcp, _tag) \
	52	(((u8 )(_fcp)->snsbase.kva) + (_tag BFI_IOIM_SNSLEN))
a36c61f9 KG	53
	54	#define BFA_ITNIM_MIN 32
	55	#define BFA_ITNIM_MAX 1024
	56
	57	#define BFA_IOIM_MIN 8
	58	#define BFA_IOIM_MAX 2000
	59
	60	#define BFA_TSKIM_MIN 4
	61	#define BFA_TSKIM_MAX 512
	62	#define BFA_FCPIM_PATHTOV_DEF (30 * 1000) /* in millisecs */
	63	#define BFA_FCPIM_PATHTOV_MAX (90 * 1000) /* in millisecs */
	64
	65
	66	#define bfa_itnim_ioprofile_update(__itnim, __index) \
	67	(__itnim->ioprofile.iocomps[__index]++)
	68
	69	#define BFA_IOIM_RETRY_TAG_OFFSET 11
15821f05	70	#define BFA_IOIM_IOTAG_MASK 0x07ff /* 2K IOs */
a36c61f9 KG	71	#define BFA_IOIM_RETRY_MAX 7
	72
	73	/* Buckets are are 512 bytes to 2MB */
	74	static inline u32
	75	bfa_ioim_get_index(u32 n) {
	76	int pos = 0;
	77	if (n >= (1UL)<<22)
	78	return BFA_IOBUCKET_MAX - 1;
	79	n >>= 8;
	80	if (n >= (1UL)<<16)
	81	n >>= 16; pos += 16;
	82	if (n >= 1 << 8)
	83	n >>= 8; pos += 8;
	84	if (n >= 1 << 4)
	85	n >>= 4; pos += 4;
	86	if (n >= 1 << 2)
	87	n >>= 2; pos += 2;
	88	if (n >= 1 << 1)
	89	pos += 1;
	90
	91	return (n == 0) ? (0) : pos;
	92	}
	93
	94	/*
	95	* forward declarations
	96	*/
	97	struct bfa_ioim_s;
	98	struct bfa_tskim_s;
	99	struct bfad_ioim_s;
	100	struct bfad_tskim_s;
	101
	102	typedef void (bfa_fcpim_profile_t) (struct bfa_ioim_s ioim);
	103
e2187d7f	104	struct bfa_fcpim_s {
a36c61f9	105	struct bfa_s *bfa;
e2187d7f	106	struct bfa_fcp_mod_s *fcp;
a36c61f9 KG	107	struct bfa_itnim_s *itnim_arr;
	108	struct bfa_ioim_s *ioim_arr;
	109	struct bfa_ioim_sp_s *ioim_sp_arr;
	110	struct bfa_tskim_s *tskim_arr;
a36c61f9	111	int num_itnims;
a36c61f9 KG	112	int num_tskim_reqs;
	113	u32 path_tov;
	114	u16 q_depth;
	115	u8 reqq; /* Request queue to be used */
	116	u8 rsvd;
	117	struct list_head itnim_q; /* queue of active itnim */
a36c61f9 KG	118	struct list_head ioim_resfree_q; /* IOs waiting for f/w */
	119	struct list_head ioim_comp_q; /* IO global comp Q */
	120	struct list_head tskim_free_q;
da99dcc9 MZ	121	u32 ios_active; /* current active IOs */
da99dcc9 MZ	122	u32 delay_comp;
a36c61f9 KG	123	struct bfa_fcpim_del_itn_stats_s del_itn_stats;
	124	bfa_boolean_t ioredirect;
	125	bfa_boolean_t io_profile;
da99dcc9	126	u32 io_profile_start_time;
a36c61f9 KG	127	bfa_fcpim_profile_t profile_comp;
	128	bfa_fcpim_profile_t profile_start;
	129	};
	130
e2187d7f KG	131	struct bfa_fcp_mod_s {
	132	struct bfa_s *bfa;
	133	struct list_head iotag_ioim_free_q; /* free IO resources */
	134	struct list_head iotag_tio_free_q; /* free IO resources */
	135	struct bfa_iotag_s *iotag_arr;
	136	struct bfa_itn_s *itn_arr;
	137	int num_ioim_reqs;
	138	int num_fwtio_reqs;
	139	int num_itns;
	140	struct bfa_dma_s snsbase;
	141	struct bfa_fcpim_s fcpim;
	142	};
	143
acdc79a6	144	/*
a36c61f9 KG	145	* BFA IO (initiator mode)
	146	*/
	147	struct bfa_ioim_s {
	148	struct list_head qe; /* queue elememt */
	149	bfa_sm_t sm; /* BFA ioim state machine */
	150	struct bfa_s bfa; / BFA module */
e2187d7f	151	struct bfa_fcpim_s fcpim; / parent fcpim module */
a36c61f9 KG	152	struct bfa_itnim_s itnim; / i-t-n nexus for this IO */
a36c61f9 KG	153	struct bfad_ioim_s dio; / driver IO handle */
da99dcc9 MZ	154	u16 iotag; /* FWI IO tag */
	155	u16 abort_tag; /* unqiue abort request tag */
	156	u16 nsges; /* number of SG elements */
	157	u16 nsgpgs; /* number of SG pages */
a36c61f9 KG	158	struct bfa_sgpg_s sgpg; / first SG page */
	159	struct list_head sgpg_q; /* allocated SG pages */
	160	struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
	161	bfa_cb_cbfn_t io_cbfn; /* IO completion handler */
da99dcc9 MZ	162	struct bfa_ioim_sp_s iosp; / slow-path IO handling */
	163	u8 reqq; /* Request queue for I/O */
	164	u64 start_time; /* IO's Profile start val */
a36c61f9 KG	165	};
a36c61f9 KG	166
a36c61f9 KG	167	struct bfa_ioim_sp_s {
a36c61f9 KG	168	struct bfi_msg_s comp_rspmsg; /* IO comp f/w response */
da99dcc9 MZ	169	struct bfa_sgpg_wqe_s sgpg_wqe; /* waitq elem for sgpg */
da99dcc9 MZ	170	struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
a36c61f9 KG	171	bfa_boolean_t abort_explicit; /* aborted by OS */
	172	struct bfa_tskim_s tskim; / Relevant TM cmd */
	173	};
	174
acdc79a6	175	/*
a36c61f9 KG	176	* BFA Task management command (initiator mode)
	177	*/
	178	struct bfa_tskim_s {
	179	struct list_head qe;
	180	bfa_sm_t sm;
da99dcc9	181	struct bfa_s bfa; / BFA module */
e2187d7f	182	struct bfa_fcpim_s fcpim; / parent fcpim module */
a36c61f9	183	struct bfa_itnim_s itnim; / i-t-n nexus for this IO */
f314878a	184	struct bfad_tskim_s dtsk; / driver task mgmt cmnd */
da99dcc9	185	bfa_boolean_t notify; /* notify itnim on TM comp */
f314878a	186	struct scsi_lun lun; /* lun if applicable */
da99dcc9 MZ	187	enum fcp_tm_cmnd tm_cmnd; /* task management command */
	188	u16 tsk_tag; /* FWI IO tag */
	189	u8 tsecs; /* timeout in seconds */
a36c61f9 KG	190	struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
a36c61f9 KG	191	struct list_head io_q; /* queue of affected IOs */
da99dcc9	192	struct bfa_wc_s wc; /* waiting counter */
a36c61f9 KG	193	struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
	194	enum bfi_tskim_status tsk_status; /* TM status */
	195	};
	196
acdc79a6	197	/*
a36c61f9 KG	198	* BFA i-t-n (initiator mode)
	199	*/
	200	struct bfa_itnim_s {
da99dcc9 MZ	201	struct list_head qe; /* queue element */
	202	bfa_sm_t sm; /* i-t-n im BFA state machine */
	203	struct bfa_s bfa; / bfa instance */
	204	struct bfa_rport_s rport; / bfa rport */
	205	void ditn; / driver i-t-n structure */
a36c61f9	206	struct bfi_mhdr_s mhdr; /* pre-built mhdr */
da99dcc9 MZ	207	u8 msg_no; /* itnim/rport firmware handle */
da99dcc9 MZ	208	u8 reqq; /* CQ for requests */
a36c61f9 KG	209	struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
	210	struct list_head pending_q; /* queue of pending IO requests */
	211	struct list_head io_q; /* queue of active IO requests */
	212	struct list_head io_cleanup_q; /* IO being cleaned up */
	213	struct list_head tsk_q; /* queue of active TM commands */
	214	struct list_head delay_comp_q; /* queue of failed inflight cmds */
	215	bfa_boolean_t seq_rec; /* SQER supported */
	216	bfa_boolean_t is_online; /* itnim is ONLINE for IO */
	217	bfa_boolean_t iotov_active; /* IO TOV timer is active */
da99dcc9 MZ	218	struct bfa_wc_s wc; /* waiting counter */
da99dcc9 MZ	219	struct bfa_timer_s timer; /* pending IO TOV */
a36c61f9	220	struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
e2187d7f	221	struct bfa_fcpim_s fcpim; / fcpim module */
a36c61f9 KG	222	struct bfa_itnim_iostats_s stats;
	223	struct bfa_itnim_ioprofile_s ioprofile;
	224	};
	225
a36c61f9	226	#define bfa_itnim_is_online(_itnim) ((_itnim)->is_online)
e2187d7f	227	#define BFA_FCPIM(_hal) (&(_hal)->modules.fcp_mod.fcpim)
15821f05	228	#define BFA_IOIM_TAG_2_ID(_iotag) ((_iotag) & BFA_IOIM_IOTAG_MASK)
a36c61f9	229	#define BFA_IOIM_FROM_TAG(_fcpim, _iotag) \
15821f05	230	(&fcpim->ioim_arr[(_iotag & BFA_IOIM_IOTAG_MASK)])
a36c61f9 KG	231	#define BFA_TSKIM_FROM_TAG(_fcpim, _tmtag) \
	232	(&fcpim->tskim_arr[_tmtag & (fcpim->num_tskim_reqs - 1)])
	233
	234	#define bfa_io_profile_start_time(_bfa) \
e2187d7f	235	((_bfa)->modules.fcp_mod.fcpim.io_profile_start_time)
a36c61f9	236	#define bfa_fcpim_get_io_profile(_bfa) \
e2187d7f	237	((_bfa)->modules.fcp_mod.fcpim.io_profile)
15821f05 KG	238	#define bfa_ioim_update_iotag(__ioim) do { \
	239	uint16_t k = (__ioim)->iotag >> BFA_IOIM_RETRY_TAG_OFFSET; \
	240	k++; (__ioim)->iotag &= BFA_IOIM_IOTAG_MASK; \
	241	(__ioim)->iotag \|= k << BFA_IOIM_RETRY_TAG_OFFSET; \
	242	} while (0)
a36c61f9 KG	243
a36c61f9 KG	244	static inline bfa_boolean_t
15821f05	245	bfa_ioim_maxretry_reached(struct bfa_ioim_s *ioim)
a36c61f9	246	{
15821f05 KG	247	uint16_t k = ioim->iotag >> BFA_IOIM_RETRY_TAG_OFFSET;
15821f05 KG	248	if (k < BFA_IOIM_RETRY_MAX)
a36c61f9	249	return BFA_FALSE;
a36c61f9 KG	250	return BFA_TRUE;
a36c61f9 KG	251	}
15821f05	252
a36c61f9 KG	253	/*
	254	* function prototypes
	255	*/
e2187d7f	256	void bfa_ioim_attach(struct bfa_fcpim_s *fcpim,
a36c61f9	257	struct bfa_meminfo_s *minfo);
a36c61f9 KG	258	void bfa_ioim_isr(struct bfa_s bfa, struct bfi_msg_s msg);
	259	void bfa_ioim_good_comp_isr(struct bfa_s *bfa,
	260	struct bfi_msg_s *msg);
	261	void bfa_ioim_cleanup(struct bfa_ioim_s *ioim);
	262	void bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim,
	263	struct bfa_tskim_s *tskim);
	264	void bfa_ioim_iocdisable(struct bfa_ioim_s *ioim);
	265	void bfa_ioim_tov(struct bfa_ioim_s *ioim);
	266
e2187d7f	267	void bfa_tskim_attach(struct bfa_fcpim_s *fcpim,
a36c61f9	268	struct bfa_meminfo_s *minfo);
a36c61f9 KG	269	void bfa_tskim_isr(struct bfa_s bfa, struct bfi_msg_s msg);
	270	void bfa_tskim_iodone(struct bfa_tskim_s *tskim);
	271	void bfa_tskim_iocdisable(struct bfa_tskim_s *tskim);
	272	void bfa_tskim_cleanup(struct bfa_tskim_s *tskim);
	273
	274	void bfa_itnim_meminfo(struct bfa_iocfc_cfg_s cfg, u32 km_len,
	275	u32 *dm_len);
e2187d7f	276	void bfa_itnim_attach(struct bfa_fcpim_s *fcpim,
a36c61f9	277	struct bfa_meminfo_s *minfo);
a36c61f9 KG	278	void bfa_itnim_iocdisable(struct bfa_itnim_s *itnim);
	279	void bfa_itnim_isr(struct bfa_s bfa, struct bfi_msg_s msg);
	280	void bfa_itnim_iodone(struct bfa_itnim_s *itnim);
	281	void bfa_itnim_tskdone(struct bfa_itnim_s *itnim);
	282	bfa_boolean_t bfa_itnim_hold_io(struct bfa_itnim_s *itnim);
a36c61f9 KG	283
	284	/*
	285	* bfa fcpim module API functions
	286	*/
da99dcc9	287	void bfa_fcpim_path_tov_set(struct bfa_s *bfa, u16 path_tov);
a36c61f9	288	u16 bfa_fcpim_path_tov_get(struct bfa_s *bfa);
a36c61f9	289	u16 bfa_fcpim_qdepth_get(struct bfa_s *bfa);
da99dcc9	290
a36c61f9	291	#define bfa_fcpim_ioredirect_enabled(__bfa) \
e2187d7f	292	(((struct bfa_fcpim_s *)(BFA_FCPIM(__bfa)))->ioredirect)
a36c61f9 KG	293
	294	#define bfa_fcpim_get_next_reqq(__bfa, __qid) \
	295	{ \
e2187d7f	296	struct bfa_fcpim_s *__fcpim = BFA_FCPIM(__bfa); \
a36c61f9 KG	297	__fcpim->reqq++; \
	298	__fcpim->reqq &= (BFI_IOC_MAX_CQS - 1); \
	299	*(__qid) = __fcpim->reqq; \
	300	}
	301
	302	#define bfa_iocfc_map_msg_to_qid(__msg, __qid) \
	303	*(__qid) = (u8)((__msg) & (BFI_IOC_MAX_CQS - 1));
	304	/*
	305	* bfa itnim API functions
	306	*/
	307	struct bfa_itnim_s bfa_itnim_create(struct bfa_s bfa,
da99dcc9 MZ	308	struct bfa_rport_s rport, void itnim);
	309	void bfa_itnim_delete(struct bfa_itnim_s *itnim);
	310	void bfa_itnim_online(struct bfa_itnim_s *itnim, bfa_boolean_t seq_rec);
	311	void bfa_itnim_offline(struct bfa_itnim_s *itnim);
	312	void bfa_itnim_clear_stats(struct bfa_itnim_s *itnim);
	313	bfa_status_t bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim,
	314	struct bfa_itnim_ioprofile_s *ioprofile);
	315
a36c61f9 KG	316	#define bfa_itnim_get_reqq(__ioim) (((struct bfa_ioim_s *)__ioim)->itnim->reqq)
a36c61f9 KG	317
acdc79a6	318	/*
da99dcc9	319	* BFA completion callback for bfa_itnim_online().
a36c61f9 KG	320	*/
	321	void bfa_cb_itnim_online(void *itnim);
	322
acdc79a6	323	/*
da99dcc9	324	* BFA completion callback for bfa_itnim_offline().
a36c61f9 KG	325	*/
	326	void bfa_cb_itnim_offline(void *itnim);
	327	void bfa_cb_itnim_tov_begin(void *itnim);
	328	void bfa_cb_itnim_tov(void *itnim);
	329
acdc79a6	330	/*
da99dcc9	331	* BFA notification to FCS/driver for second level error recovery.
a36c61f9 KG	332	* Atleast one I/O request has timedout and target is unresponsive to
	333	* repeated abort requests. Second level error recovery should be initiated
	334	* by starting implicit logout and recovery procedures.
a36c61f9 KG	335	*/
	336	void bfa_cb_itnim_sler(void *itnim);
	337
	338	/*
	339	* bfa ioim API functions
	340	*/
	341	struct bfa_ioim_s bfa_ioim_alloc(struct bfa_s bfa,
	342	struct bfad_ioim_s *dio,
	343	struct bfa_itnim_s *itnim,
	344	u16 nsgles);
	345
	346	void bfa_ioim_free(struct bfa_ioim_s *ioim);
	347	void bfa_ioim_start(struct bfa_ioim_s *ioim);
	348	bfa_status_t bfa_ioim_abort(struct bfa_ioim_s *ioim);
	349	void bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim,
	350	bfa_boolean_t iotov);
acdc79a6	351	/*
da99dcc9	352	* I/O completion notification.
a36c61f9 KG	353	*
	354	* @param[in] dio driver IO structure
	355	* @param[in] io_status IO completion status
	356	* @param[in] scsi_status SCSI status returned by target
	357	* @param[in] sns_len SCSI sense length, 0 if none
	358	* @param[in] sns_info SCSI sense data, if any
	359	* @param[in] residue Residual length
	360	*
	361	* @return None
	362	*/
da99dcc9 MZ	363	void bfa_cb_ioim_done(void bfad, struct bfad_ioim_s dio,
	364	enum bfi_ioim_status io_status,
	365	u8 scsi_status, int sns_len,
	366	u8 *sns_info, s32 residue);
a36c61f9	367
acdc79a6	368	/*
da99dcc9	369	* I/O good completion notification.
a36c61f9	370	*/
da99dcc9	371	void bfa_cb_ioim_good_comp(void bfad, struct bfad_ioim_s dio);
a36c61f9	372
acdc79a6	373	/*
da99dcc9	374	* I/O abort completion notification
a36c61f9	375	*/
da99dcc9	376	void bfa_cb_ioim_abort(void bfad, struct bfad_ioim_s dio);
a36c61f9 KG	377
	378	/*
	379	* bfa tskim API functions
	380	*/
da99dcc9 MZ	381	struct bfa_tskim_s bfa_tskim_alloc(struct bfa_s bfa,
	382	struct bfad_tskim_s *dtsk);
	383	void bfa_tskim_free(struct bfa_tskim_s *tskim);
	384	void bfa_tskim_start(struct bfa_tskim_s *tskim,
	385	struct bfa_itnim_s *itnim, struct scsi_lun lun,
	386	enum fcp_tm_cmnd tm, u8 t_secs);
	387	void bfa_cb_tskim_done(void bfad, struct bfad_tskim_s dtsk,
	388	enum bfi_tskim_status tsk_status);
a36c61f9 KG	389
a36c61f9 KG	390	#endif /* __BFA_FCPIM_H__ */