[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	BFI_IO_MAX
#define BFA_FWTIO_MAX	2000

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);
void bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw);

#define BFA_FCP_MOD(_hal)	(&(_hal)->modules.fcp_mod)
#define BFA_MEM_FCP_KVA(__bfa)	(&(BFA_FCP_MOD(__bfa)->kva_seg))
#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) \
	bfa_mem_get_dmabuf_kva(_fcp, _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 */
	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;
	struct list_head	tskim_unused_q;	/* Unused tskim 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;
};

/* Max FCP dma segs required */
#define BFA_FCP_DMA_SEGS	BFI_IOIM_SNSBUF_SEGS

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 list_head	iotag_unused_q;	/* unused 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[BFA_FCP_DMA_SEGS];
	struct bfa_fcpim_s	fcpim;
	struct bfa_mem_dma_s	dma_seg[BFA_FCP_DMA_SEGS];
	struct bfa_mem_kva_s	kva_seg;
};

/*
 * 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 */
	u8			mode;		/*  IO is passthrough or not */
	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);
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);
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_tskim_res_recfg(struct bfa_s *bfa, u16 num_tskim_fw);

void	bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len);
void	bfa_itnim_attach(struct bfa_fcpim_s *fcpim);
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);
bfa_status_t bfa_fcpim_port_iostats(struct bfa_s *bfa,
			struct bfa_itnim_iostats_s *stats, u8 lp_tag);
void bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *fcpim_stats,
			struct bfa_itnim_iostats_s *itnim_stats);
bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time);
bfa_status_t bfa_fcpim_profile_off(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);

void	bfa_fcpim_lunmask_rp_update(struct bfa_s *bfa, wwn_t lp_wwn,
			wwn_t rp_wwn, u16 rp_tag, u8 lp_tag);
bfa_status_t	bfa_fcpim_lunmask_update(struct bfa_s *bfa, u32 on_off);
bfa_status_t	bfa_fcpim_lunmask_query(struct bfa_s *bfa, void *buf);
bfa_status_t	bfa_fcpim_lunmask_delete(struct bfa_s *bfa, u16 vf_id,
				wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun);
bfa_status_t	bfa_fcpim_lunmask_add(struct bfa_s *bfa, u16 vf_id,
				wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun);
bfa_status_t	bfa_fcpim_lunmask_clear(struct bfa_s *bfa);

#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	27	/* FCP module related definitions */
4507025d KG	28	#define BFA_IO_MAX BFI_IO_MAX
4507025d KG	29	#define BFA_FWTIO_MAX 2000
e2187d7f KG	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);
4507025d	44	void bfa_iotag_attach(struct bfa_fcp_mod_s *fcp);
3fd45980	45	void bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw);
e2187d7f KG	46
e2187d7f KG	47	#define BFA_FCP_MOD(_hal) (&(_hal)->modules.fcp_mod)
4507025d	48	#define BFA_MEM_FCP_KVA(__bfa) (&(BFA_FCP_MOD(__bfa)->kva_seg))
e2187d7f KG	49	#define BFA_IOTAG_FROM_TAG(_fcp, _tag) \
	50	(&(_fcp)->iotag_arr[(_tag & BFA_IOIM_IOTAG_MASK)])
	51	#define BFA_ITN_FROM_TAG(_fcp, _tag) \
	52	((_fcp)->itn_arr + ((_tag) & ((_fcp)->num_itns - 1)))
	53	#define BFA_SNSINFO_FROM_TAG(_fcp, _tag) \
4507025d	54	bfa_mem_get_dmabuf_kva(_fcp, _tag, BFI_IOIM_SNSLEN)
a36c61f9 KG	55
	56	#define BFA_ITNIM_MIN 32
	57	#define BFA_ITNIM_MAX 1024
	58
	59	#define BFA_IOIM_MIN 8
	60	#define BFA_IOIM_MAX 2000
	61
	62	#define BFA_TSKIM_MIN 4
	63	#define BFA_TSKIM_MAX 512
	64	#define BFA_FCPIM_PATHTOV_DEF (30 * 1000) /* in millisecs */
	65	#define BFA_FCPIM_PATHTOV_MAX (90 * 1000) /* in millisecs */
	66
	67
	68	#define bfa_itnim_ioprofile_update(__itnim, __index) \
	69	(__itnim->ioprofile.iocomps[__index]++)
	70
	71	#define BFA_IOIM_RETRY_TAG_OFFSET 11
15821f05	72	#define BFA_IOIM_IOTAG_MASK 0x07ff /* 2K IOs */
a36c61f9 KG	73	#define BFA_IOIM_RETRY_MAX 7
	74
	75	/* Buckets are are 512 bytes to 2MB */
	76	static inline u32
	77	bfa_ioim_get_index(u32 n) {
	78	int pos = 0;
	79	if (n >= (1UL)<<22)
	80	return BFA_IOBUCKET_MAX - 1;
	81	n >>= 8;
42a8e6e2 KG	82	if (n >= (1UL)<<16) {
	83	n >>= 16;
	84	pos += 16;
	85	}
	86	if (n >= 1 << 8) {
	87	n >>= 8;
	88	pos += 8;
	89	}
	90	if (n >= 1 << 4) {
	91	n >>= 4;
	92	pos += 4;
	93	}
	94	if (n >= 1 << 2) {
	95	n >>= 2;
	96	pos += 2;
	97	}
a36c61f9 KG	98	if (n >= 1 << 1)
	99	pos += 1;
	100
	101	return (n == 0) ? (0) : pos;
	102	}
	103
	104	/*
	105	* forward declarations
	106	*/
	107	struct bfa_ioim_s;
	108	struct bfa_tskim_s;
	109	struct bfad_ioim_s;
	110	struct bfad_tskim_s;
	111
	112	typedef void (bfa_fcpim_profile_t) (struct bfa_ioim_s ioim);
	113
e2187d7f	114	struct bfa_fcpim_s {
a36c61f9	115	struct bfa_s *bfa;
e2187d7f	116	struct bfa_fcp_mod_s *fcp;
a36c61f9 KG	117	struct bfa_itnim_s *itnim_arr;
	118	struct bfa_ioim_s *ioim_arr;
	119	struct bfa_ioim_sp_s *ioim_sp_arr;
	120	struct bfa_tskim_s *tskim_arr;
a36c61f9	121	int num_itnims;
a36c61f9 KG	122	int num_tskim_reqs;
	123	u32 path_tov;
	124	u16 q_depth;
	125	u8 reqq; /* Request queue to be used */
a36c61f9	126	struct list_head itnim_q; /* queue of active itnim */
a36c61f9 KG	127	struct list_head ioim_resfree_q; /* IOs waiting for f/w */
	128	struct list_head ioim_comp_q; /* IO global comp Q */
	129	struct list_head tskim_free_q;
3fd45980	130	struct list_head tskim_unused_q; /* Unused tskim Q */
da99dcc9 MZ	131	u32 ios_active; /* current active IOs */
da99dcc9 MZ	132	u32 delay_comp;
a36c61f9 KG	133	struct bfa_fcpim_del_itn_stats_s del_itn_stats;
	134	bfa_boolean_t ioredirect;
	135	bfa_boolean_t io_profile;
da99dcc9	136	u32 io_profile_start_time;
a36c61f9 KG	137	bfa_fcpim_profile_t profile_comp;
	138	bfa_fcpim_profile_t profile_start;
	139	};
	140
4507025d KG	141	/* Max FCP dma segs required */
	142	#define BFA_FCP_DMA_SEGS BFI_IOIM_SNSBUF_SEGS
	143
e2187d7f KG	144	struct bfa_fcp_mod_s {
	145	struct bfa_s *bfa;
	146	struct list_head iotag_ioim_free_q; /* free IO resources */
	147	struct list_head iotag_tio_free_q; /* free IO resources */
3fd45980	148	struct list_head iotag_unused_q; /* unused IO resources*/
e2187d7f KG	149	struct bfa_iotag_s *iotag_arr;
	150	struct bfa_itn_s *itn_arr;
	151	int num_ioim_reqs;
	152	int num_fwtio_reqs;
	153	int num_itns;
4507025d	154	struct bfa_dma_s snsbase[BFA_FCP_DMA_SEGS];
e2187d7f	155	struct bfa_fcpim_s fcpim;
4507025d KG	156	struct bfa_mem_dma_s dma_seg[BFA_FCP_DMA_SEGS];
4507025d KG	157	struct bfa_mem_kva_s kva_seg;
e2187d7f KG	158	};
e2187d7f KG	159
acdc79a6	160	/*
a36c61f9 KG	161	* BFA IO (initiator mode)
	162	*/
	163	struct bfa_ioim_s {
	164	struct list_head qe; /* queue elememt */
	165	bfa_sm_t sm; /* BFA ioim state machine */
	166	struct bfa_s bfa; / BFA module */
e2187d7f	167	struct bfa_fcpim_s fcpim; / parent fcpim module */
a36c61f9 KG	168	struct bfa_itnim_s itnim; / i-t-n nexus for this IO */
a36c61f9 KG	169	struct bfad_ioim_s dio; / driver IO handle */
da99dcc9 MZ	170	u16 iotag; /* FWI IO tag */
	171	u16 abort_tag; /* unqiue abort request tag */
	172	u16 nsges; /* number of SG elements */
	173	u16 nsgpgs; /* number of SG pages */
a36c61f9 KG	174	struct bfa_sgpg_s sgpg; / first SG page */
	175	struct list_head sgpg_q; /* allocated SG pages */
	176	struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
	177	bfa_cb_cbfn_t io_cbfn; /* IO completion handler */
da99dcc9 MZ	178	struct bfa_ioim_sp_s iosp; / slow-path IO handling */
da99dcc9 MZ	179	u8 reqq; /* Request queue for I/O */
83763d59	180	u8 mode; /* IO is passthrough or not */
da99dcc9	181	u64 start_time; /* IO's Profile start val */
a36c61f9 KG	182	};
a36c61f9 KG	183
a36c61f9 KG	184	struct bfa_ioim_sp_s {
a36c61f9 KG	185	struct bfi_msg_s comp_rspmsg; /* IO comp f/w response */
da99dcc9 MZ	186	struct bfa_sgpg_wqe_s sgpg_wqe; /* waitq elem for sgpg */
da99dcc9 MZ	187	struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
a36c61f9 KG	188	bfa_boolean_t abort_explicit; /* aborted by OS */
	189	struct bfa_tskim_s tskim; / Relevant TM cmd */
	190	};
	191
acdc79a6	192	/*
a36c61f9 KG	193	* BFA Task management command (initiator mode)
	194	*/
	195	struct bfa_tskim_s {
	196	struct list_head qe;
	197	bfa_sm_t sm;
da99dcc9	198	struct bfa_s bfa; / BFA module */
e2187d7f	199	struct bfa_fcpim_s fcpim; / parent fcpim module */
a36c61f9	200	struct bfa_itnim_s itnim; / i-t-n nexus for this IO */
f314878a	201	struct bfad_tskim_s dtsk; / driver task mgmt cmnd */
da99dcc9	202	bfa_boolean_t notify; /* notify itnim on TM comp */
f314878a	203	struct scsi_lun lun; /* lun if applicable */
da99dcc9 MZ	204	enum fcp_tm_cmnd tm_cmnd; /* task management command */
	205	u16 tsk_tag; /* FWI IO tag */
	206	u8 tsecs; /* timeout in seconds */
a36c61f9 KG	207	struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
a36c61f9 KG	208	struct list_head io_q; /* queue of affected IOs */
da99dcc9	209	struct bfa_wc_s wc; /* waiting counter */
a36c61f9 KG	210	struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
	211	enum bfi_tskim_status tsk_status; /* TM status */
	212	};
	213
acdc79a6	214	/*
a36c61f9 KG	215	* BFA i-t-n (initiator mode)
	216	*/
	217	struct bfa_itnim_s {
da99dcc9 MZ	218	struct list_head qe; /* queue element */
	219	bfa_sm_t sm; /* i-t-n im BFA state machine */
	220	struct bfa_s bfa; / bfa instance */
	221	struct bfa_rport_s rport; / bfa rport */
	222	void ditn; / driver i-t-n structure */
a36c61f9	223	struct bfi_mhdr_s mhdr; /* pre-built mhdr */
da99dcc9 MZ	224	u8 msg_no; /* itnim/rport firmware handle */
da99dcc9 MZ	225	u8 reqq; /* CQ for requests */
a36c61f9 KG	226	struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
	227	struct list_head pending_q; /* queue of pending IO requests */
	228	struct list_head io_q; /* queue of active IO requests */
	229	struct list_head io_cleanup_q; /* IO being cleaned up */
	230	struct list_head tsk_q; /* queue of active TM commands */
	231	struct list_head delay_comp_q; /* queue of failed inflight cmds */
	232	bfa_boolean_t seq_rec; /* SQER supported */
	233	bfa_boolean_t is_online; /* itnim is ONLINE for IO */
	234	bfa_boolean_t iotov_active; /* IO TOV timer is active */
da99dcc9 MZ	235	struct bfa_wc_s wc; /* waiting counter */
da99dcc9 MZ	236	struct bfa_timer_s timer; /* pending IO TOV */
a36c61f9	237	struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
e2187d7f	238	struct bfa_fcpim_s fcpim; / fcpim module */
a36c61f9 KG	239	struct bfa_itnim_iostats_s stats;
	240	struct bfa_itnim_ioprofile_s ioprofile;
	241	};
	242
a36c61f9	243	#define bfa_itnim_is_online(_itnim) ((_itnim)->is_online)
e2187d7f	244	#define BFA_FCPIM(_hal) (&(_hal)->modules.fcp_mod.fcpim)
15821f05	245	#define BFA_IOIM_TAG_2_ID(_iotag) ((_iotag) & BFA_IOIM_IOTAG_MASK)
a36c61f9	246	#define BFA_IOIM_FROM_TAG(_fcpim, _iotag) \
15821f05	247	(&fcpim->ioim_arr[(_iotag & BFA_IOIM_IOTAG_MASK)])
a36c61f9 KG	248	#define BFA_TSKIM_FROM_TAG(_fcpim, _tmtag) \
	249	(&fcpim->tskim_arr[_tmtag & (fcpim->num_tskim_reqs - 1)])
	250
	251	#define bfa_io_profile_start_time(_bfa) \
e2187d7f	252	((_bfa)->modules.fcp_mod.fcpim.io_profile_start_time)
a36c61f9	253	#define bfa_fcpim_get_io_profile(_bfa) \
e2187d7f	254	((_bfa)->modules.fcp_mod.fcpim.io_profile)
15821f05 KG	255	#define bfa_ioim_update_iotag(__ioim) do { \
	256	uint16_t k = (__ioim)->iotag >> BFA_IOIM_RETRY_TAG_OFFSET; \
	257	k++; (__ioim)->iotag &= BFA_IOIM_IOTAG_MASK; \
	258	(__ioim)->iotag \|= k << BFA_IOIM_RETRY_TAG_OFFSET; \
	259	} while (0)
a36c61f9 KG	260
a36c61f9 KG	261	static inline bfa_boolean_t
15821f05	262	bfa_ioim_maxretry_reached(struct bfa_ioim_s *ioim)
a36c61f9	263	{
15821f05 KG	264	uint16_t k = ioim->iotag >> BFA_IOIM_RETRY_TAG_OFFSET;
15821f05 KG	265	if (k < BFA_IOIM_RETRY_MAX)
a36c61f9	266	return BFA_FALSE;
a36c61f9 KG	267	return BFA_TRUE;
a36c61f9 KG	268	}
15821f05	269
a36c61f9 KG	270	/*
	271	* function prototypes
	272	*/
4507025d	273	void bfa_ioim_attach(struct bfa_fcpim_s *fcpim);
a36c61f9 KG	274	void bfa_ioim_isr(struct bfa_s bfa, struct bfi_msg_s msg);
	275	void bfa_ioim_good_comp_isr(struct bfa_s *bfa,
	276	struct bfi_msg_s *msg);
	277	void bfa_ioim_cleanup(struct bfa_ioim_s *ioim);
	278	void bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim,
	279	struct bfa_tskim_s *tskim);
	280	void bfa_ioim_iocdisable(struct bfa_ioim_s *ioim);
	281	void bfa_ioim_tov(struct bfa_ioim_s *ioim);
	282
4507025d	283	void bfa_tskim_attach(struct bfa_fcpim_s *fcpim);
a36c61f9 KG	284	void bfa_tskim_isr(struct bfa_s bfa, struct bfi_msg_s msg);
	285	void bfa_tskim_iodone(struct bfa_tskim_s *tskim);
	286	void bfa_tskim_iocdisable(struct bfa_tskim_s *tskim);
	287	void bfa_tskim_cleanup(struct bfa_tskim_s *tskim);
3fd45980	288	void bfa_tskim_res_recfg(struct bfa_s *bfa, u16 num_tskim_fw);
a36c61f9	289
4507025d KG	290	void bfa_itnim_meminfo(struct bfa_iocfc_cfg_s cfg, u32 km_len);
4507025d KG	291	void bfa_itnim_attach(struct bfa_fcpim_s *fcpim);
a36c61f9 KG	292	void bfa_itnim_iocdisable(struct bfa_itnim_s *itnim);
	293	void bfa_itnim_isr(struct bfa_s bfa, struct bfi_msg_s msg);
	294	void bfa_itnim_iodone(struct bfa_itnim_s *itnim);
	295	void bfa_itnim_tskdone(struct bfa_itnim_s *itnim);
	296	bfa_boolean_t bfa_itnim_hold_io(struct bfa_itnim_s *itnim);
a36c61f9 KG	297
	298	/*
	299	* bfa fcpim module API functions
	300	*/
da99dcc9	301	void bfa_fcpim_path_tov_set(struct bfa_s *bfa, u16 path_tov);
a36c61f9	302	u16 bfa_fcpim_path_tov_get(struct bfa_s *bfa);
a36c61f9	303	u16 bfa_fcpim_qdepth_get(struct bfa_s *bfa);
60138066 KG	304	bfa_status_t bfa_fcpim_port_iostats(struct bfa_s *bfa,
	305	struct bfa_itnim_iostats_s *stats, u8 lp_tag);
	306	void bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *fcpim_stats,
	307	struct bfa_itnim_iostats_s *itnim_stats);
42a8e6e2 KG	308	bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time);
42a8e6e2 KG	309	bfa_status_t bfa_fcpim_profile_off(struct bfa_s *bfa);
da99dcc9	310
a36c61f9	311	#define bfa_fcpim_ioredirect_enabled(__bfa) \
e2187d7f	312	(((struct bfa_fcpim_s *)(BFA_FCPIM(__bfa)))->ioredirect)
a36c61f9 KG	313
	314	#define bfa_fcpim_get_next_reqq(__bfa, __qid) \
	315	{ \
e2187d7f	316	struct bfa_fcpim_s *__fcpim = BFA_FCPIM(__bfa); \
a36c61f9 KG	317	__fcpim->reqq++; \
	318	__fcpim->reqq &= (BFI_IOC_MAX_CQS - 1); \
	319	*(__qid) = __fcpim->reqq; \
	320	}
	321
	322	#define bfa_iocfc_map_msg_to_qid(__msg, __qid) \
	323	*(__qid) = (u8)((__msg) & (BFI_IOC_MAX_CQS - 1));
	324	/*
	325	* bfa itnim API functions
	326	*/
	327	struct bfa_itnim_s bfa_itnim_create(struct bfa_s bfa,
da99dcc9 MZ	328	struct bfa_rport_s rport, void itnim);
	329	void bfa_itnim_delete(struct bfa_itnim_s *itnim);
	330	void bfa_itnim_online(struct bfa_itnim_s *itnim, bfa_boolean_t seq_rec);
	331	void bfa_itnim_offline(struct bfa_itnim_s *itnim);
	332	void bfa_itnim_clear_stats(struct bfa_itnim_s *itnim);
	333	bfa_status_t bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim,
	334	struct bfa_itnim_ioprofile_s *ioprofile);
	335
a36c61f9 KG	336	#define bfa_itnim_get_reqq(__ioim) (((struct bfa_ioim_s *)__ioim)->itnim->reqq)
a36c61f9 KG	337
acdc79a6	338	/*
da99dcc9	339	* BFA completion callback for bfa_itnim_online().
a36c61f9 KG	340	*/
	341	void bfa_cb_itnim_online(void *itnim);
	342
acdc79a6	343	/*
da99dcc9	344	* BFA completion callback for bfa_itnim_offline().
a36c61f9 KG	345	*/
	346	void bfa_cb_itnim_offline(void *itnim);
	347	void bfa_cb_itnim_tov_begin(void *itnim);
	348	void bfa_cb_itnim_tov(void *itnim);
	349
acdc79a6	350	/*
da99dcc9	351	* BFA notification to FCS/driver for second level error recovery.
a36c61f9 KG	352	* Atleast one I/O request has timedout and target is unresponsive to
	353	* repeated abort requests. Second level error recovery should be initiated
	354	* by starting implicit logout and recovery procedures.
a36c61f9 KG	355	*/
	356	void bfa_cb_itnim_sler(void *itnim);
	357
	358	/*
	359	* bfa ioim API functions
	360	*/
	361	struct bfa_ioim_s bfa_ioim_alloc(struct bfa_s bfa,
	362	struct bfad_ioim_s *dio,
	363	struct bfa_itnim_s *itnim,
	364	u16 nsgles);
	365
	366	void bfa_ioim_free(struct bfa_ioim_s *ioim);
	367	void bfa_ioim_start(struct bfa_ioim_s *ioim);
	368	bfa_status_t bfa_ioim_abort(struct bfa_ioim_s *ioim);
	369	void bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim,
	370	bfa_boolean_t iotov);
acdc79a6	371	/*
da99dcc9	372	* I/O completion notification.
a36c61f9 KG	373	*
	374	* @param[in] dio driver IO structure
	375	* @param[in] io_status IO completion status
	376	* @param[in] scsi_status SCSI status returned by target
	377	* @param[in] sns_len SCSI sense length, 0 if none
	378	* @param[in] sns_info SCSI sense data, if any
	379	* @param[in] residue Residual length
	380	*
	381	* @return None
	382	*/
da99dcc9 MZ	383	void bfa_cb_ioim_done(void bfad, struct bfad_ioim_s dio,
	384	enum bfi_ioim_status io_status,
	385	u8 scsi_status, int sns_len,
	386	u8 *sns_info, s32 residue);
a36c61f9	387
acdc79a6	388	/*
da99dcc9	389	* I/O good completion notification.
a36c61f9	390	*/
da99dcc9	391	void bfa_cb_ioim_good_comp(void bfad, struct bfad_ioim_s dio);
a36c61f9	392
acdc79a6	393	/*
da99dcc9	394	* I/O abort completion notification
a36c61f9	395	*/
da99dcc9	396	void bfa_cb_ioim_abort(void bfad, struct bfad_ioim_s dio);
a36c61f9 KG	397
	398	/*
	399	* bfa tskim API functions
	400	*/
da99dcc9 MZ	401	struct bfa_tskim_s bfa_tskim_alloc(struct bfa_s bfa,
	402	struct bfad_tskim_s *dtsk);
	403	void bfa_tskim_free(struct bfa_tskim_s *tskim);
	404	void bfa_tskim_start(struct bfa_tskim_s *tskim,
	405	struct bfa_itnim_s *itnim, struct scsi_lun lun,
	406	enum fcp_tm_cmnd tm, u8 t_secs);
	407	void bfa_cb_tskim_done(void bfad, struct bfad_tskim_s dtsk,
	408	enum bfi_tskim_status tsk_status);
a36c61f9	409
83763d59 KG	410	void bfa_fcpim_lunmask_rp_update(struct bfa_s *bfa, wwn_t lp_wwn,
83763d59 KG	411	wwn_t rp_wwn, u16 rp_tag, u8 lp_tag);
4c5d22bf KG	412	bfa_status_t bfa_fcpim_lunmask_update(struct bfa_s *bfa, u32 on_off);
	413	bfa_status_t bfa_fcpim_lunmask_query(struct bfa_s bfa, void buf);
	414	bfa_status_t bfa_fcpim_lunmask_delete(struct bfa_s *bfa, u16 vf_id,
	415	wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun);
	416	bfa_status_t bfa_fcpim_lunmask_add(struct bfa_s *bfa, u16 vf_id,
	417	wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun);
	418	bfa_status_t bfa_fcpim_lunmask_clear(struct bfa_s *bfa);
83763d59	419
a36c61f9	420	#endif /* __BFA_FCPIM_H__ */