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linux/drivers/scsi/bfa/bfa_fcpim.h
Krishna Gudipati 15821f05b7 [SCSI] bfa: io tag handling and minor bug fix. 
Fix iotag handling:

1) Update and check io tag for retry case.
2) Clearing upper 3 bits in io tag when an IO completes.
   The 3 upper bits in io tags are used for counting FCP exchange retry.
   Un-cleared bits will cause firmware to access invalid memory when the
   same io tag is used for an IO to a target that doesn't support FCP
   exchange retry.
3) Only check the effective bits when validating an iotag.

Other minor fixes:

1) Added trace to get FC header type with assert of unhandled packet received.
   Ignore the type FC_TYPE_FC_FSS (FC_XS).
2) Fixed the adapter info display check - to check for fcmode flag even.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-12-21 12:37:17 -06:00

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/*
* 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"
#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_mod_s {
struct bfa_s *bfa;
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;
struct bfa_dma_s snsbase;
int num_itnims;
int num_ioim_reqs;
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_free_q; /* free IO resources */
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;
};
/*
* 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_mod_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 */
u8 *snsinfo; /* sense info for this IO */
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_mod_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_mod_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_MOD(_hal) (&(_hal)->modules.fcpim_mod)
#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.fcpim_mod.io_profile_start_time)
#define bfa_fcpim_get_io_profile(_bfa) \
(_bfa->modules.fcpim_mod.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_mod_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_mod_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_mod_s *fcpim,
struct bfa_meminfo_s *minfo);
void bfa_itnim_detach(struct bfa_fcpim_mod_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);
#define bfa_fcpim_ioredirect_enabled(__bfa) \
(((struct bfa_fcpim_mod_s *)(BFA_FCPIM_MOD(__bfa)))->ioredirect)
#define bfa_fcpim_get_next_reqq(__bfa, __qid) \
{ \
struct bfa_fcpim_mod_s *__fcpim = BFA_FCPIM_MOD(__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__ */
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