/* * 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_RETRY_TAG_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 */ lun_t 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_FROM_TAG(_fcpim, _iotag) \ (&fcpim->ioim_arr[(_iotag & BFA_IOIM_RETRY_TAG_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) static inline bfa_boolean_t bfa_ioim_get_iotag(struct bfa_ioim_s *ioim) { u16 k = ioim->iotag; k >>= BFA_IOIM_RETRY_TAG_OFFSET; k++; if (k > BFA_IOIM_RETRY_MAX) return BFA_FALSE; ioim->iotag &= BFA_IOIM_RETRY_TAG_MASK; ioim->iotag |= k<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_get_stats(struct bfa_itnim_s *itnim, struct bfa_itnim_iostats_s *stats); 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(). * * @param[in] itnim FCS or driver itnim instance * * return None */ void bfa_cb_itnim_online(void *itnim); /** * BFA completion callback for bfa_itnim_offline(). * * @param[in] itnim FCS or driver itnim instance * * return None */ 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. * * @param[in] itnim FCS or driver itnim instance * * return None */ 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. * * @param[in] dio driver IO structure * * @return None */ void bfa_cb_ioim_good_comp(void *bfad, struct bfad_ioim_s *dio); /** * I/O abort completion notification * * @param[in] dio driver IO that was aborted * * @return None */ 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, lun_t 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__ */