mirror of https://gitee.com/openkylin/linux.git
354 lines
11 KiB
C
354 lines
11 KiB
C
/*
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* Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
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* All rights reserved
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* www.brocade.com
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*
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* Linux driver for Brocade Fibre Channel Host Bus Adapter.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (GPL) Version 2 as
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* published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#ifndef __BFA_FCPIM_H__
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#define __BFA_FCPIM_H__
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#include "bfa.h"
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#include "bfa_svc.h"
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#include "bfi_ms.h"
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#include "bfa_defs_svc.h"
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#include "bfa_cs.h"
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#define BFA_ITNIM_MIN 32
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#define BFA_ITNIM_MAX 1024
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#define BFA_IOIM_MIN 8
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#define BFA_IOIM_MAX 2000
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#define BFA_TSKIM_MIN 4
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#define BFA_TSKIM_MAX 512
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#define BFA_FCPIM_PATHTOV_DEF (30 * 1000) /* in millisecs */
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#define BFA_FCPIM_PATHTOV_MAX (90 * 1000) /* in millisecs */
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#define bfa_itnim_ioprofile_update(__itnim, __index) \
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(__itnim->ioprofile.iocomps[__index]++)
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#define BFA_IOIM_RETRY_TAG_OFFSET 11
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#define BFA_IOIM_RETRY_TAG_MASK 0x07ff /* 2K IOs */
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#define BFA_IOIM_RETRY_MAX 7
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/* Buckets are are 512 bytes to 2MB */
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static inline u32
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bfa_ioim_get_index(u32 n) {
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int pos = 0;
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if (n >= (1UL)<<22)
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return BFA_IOBUCKET_MAX - 1;
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n >>= 8;
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if (n >= (1UL)<<16)
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n >>= 16; pos += 16;
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if (n >= 1 << 8)
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n >>= 8; pos += 8;
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if (n >= 1 << 4)
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n >>= 4; pos += 4;
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if (n >= 1 << 2)
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n >>= 2; pos += 2;
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if (n >= 1 << 1)
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pos += 1;
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return (n == 0) ? (0) : pos;
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}
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/*
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* forward declarations
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*/
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struct bfa_ioim_s;
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struct bfa_tskim_s;
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struct bfad_ioim_s;
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struct bfad_tskim_s;
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typedef void (*bfa_fcpim_profile_t) (struct bfa_ioim_s *ioim);
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struct bfa_fcpim_mod_s {
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struct bfa_s *bfa;
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struct bfa_itnim_s *itnim_arr;
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struct bfa_ioim_s *ioim_arr;
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struct bfa_ioim_sp_s *ioim_sp_arr;
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struct bfa_tskim_s *tskim_arr;
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struct bfa_dma_s snsbase;
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int num_itnims;
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int num_ioim_reqs;
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int num_tskim_reqs;
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u32 path_tov;
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u16 q_depth;
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u8 reqq; /* Request queue to be used */
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u8 rsvd;
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struct list_head itnim_q; /* queue of active itnim */
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struct list_head ioim_free_q; /* free IO resources */
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struct list_head ioim_resfree_q; /* IOs waiting for f/w */
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struct list_head ioim_comp_q; /* IO global comp Q */
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struct list_head tskim_free_q;
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u32 ios_active; /* current active IOs */
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u32 delay_comp;
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struct bfa_fcpim_del_itn_stats_s del_itn_stats;
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bfa_boolean_t ioredirect;
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bfa_boolean_t io_profile;
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u32 io_profile_start_time;
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bfa_fcpim_profile_t profile_comp;
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bfa_fcpim_profile_t profile_start;
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};
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/*
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* BFA IO (initiator mode)
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*/
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struct bfa_ioim_s {
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struct list_head qe; /* queue elememt */
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bfa_sm_t sm; /* BFA ioim state machine */
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struct bfa_s *bfa; /* BFA module */
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struct bfa_fcpim_mod_s *fcpim; /* parent fcpim module */
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struct bfa_itnim_s *itnim; /* i-t-n nexus for this IO */
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struct bfad_ioim_s *dio; /* driver IO handle */
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u16 iotag; /* FWI IO tag */
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u16 abort_tag; /* unqiue abort request tag */
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u16 nsges; /* number of SG elements */
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u16 nsgpgs; /* number of SG pages */
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struct bfa_sgpg_s *sgpg; /* first SG page */
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struct list_head sgpg_q; /* allocated SG pages */
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struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
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bfa_cb_cbfn_t io_cbfn; /* IO completion handler */
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struct bfa_ioim_sp_s *iosp; /* slow-path IO handling */
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u8 reqq; /* Request queue for I/O */
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u64 start_time; /* IO's Profile start val */
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};
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struct bfa_ioim_sp_s {
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struct bfi_msg_s comp_rspmsg; /* IO comp f/w response */
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u8 *snsinfo; /* sense info for this IO */
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struct bfa_sgpg_wqe_s sgpg_wqe; /* waitq elem for sgpg */
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struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
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bfa_boolean_t abort_explicit; /* aborted by OS */
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struct bfa_tskim_s *tskim; /* Relevant TM cmd */
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};
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/*
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* BFA Task management command (initiator mode)
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*/
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struct bfa_tskim_s {
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struct list_head qe;
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bfa_sm_t sm;
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struct bfa_s *bfa; /* BFA module */
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struct bfa_fcpim_mod_s *fcpim; /* parent fcpim module */
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struct bfa_itnim_s *itnim; /* i-t-n nexus for this IO */
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struct bfad_tskim_s *dtsk; /* driver task mgmt cmnd */
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bfa_boolean_t notify; /* notify itnim on TM comp */
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struct scsi_lun lun; /* lun if applicable */
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enum fcp_tm_cmnd tm_cmnd; /* task management command */
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u16 tsk_tag; /* FWI IO tag */
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u8 tsecs; /* timeout in seconds */
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struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
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struct list_head io_q; /* queue of affected IOs */
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struct bfa_wc_s wc; /* waiting counter */
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struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
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enum bfi_tskim_status tsk_status; /* TM status */
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};
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/*
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* BFA i-t-n (initiator mode)
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*/
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struct bfa_itnim_s {
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struct list_head qe; /* queue element */
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bfa_sm_t sm; /* i-t-n im BFA state machine */
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struct bfa_s *bfa; /* bfa instance */
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struct bfa_rport_s *rport; /* bfa rport */
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void *ditn; /* driver i-t-n structure */
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struct bfi_mhdr_s mhdr; /* pre-built mhdr */
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u8 msg_no; /* itnim/rport firmware handle */
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u8 reqq; /* CQ for requests */
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struct bfa_cb_qe_s hcb_qe; /* bfa callback qelem */
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struct list_head pending_q; /* queue of pending IO requests */
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struct list_head io_q; /* queue of active IO requests */
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struct list_head io_cleanup_q; /* IO being cleaned up */
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struct list_head tsk_q; /* queue of active TM commands */
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struct list_head delay_comp_q; /* queue of failed inflight cmds */
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bfa_boolean_t seq_rec; /* SQER supported */
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bfa_boolean_t is_online; /* itnim is ONLINE for IO */
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bfa_boolean_t iotov_active; /* IO TOV timer is active */
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struct bfa_wc_s wc; /* waiting counter */
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struct bfa_timer_s timer; /* pending IO TOV */
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struct bfa_reqq_wait_s reqq_wait; /* to wait for room in reqq */
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struct bfa_fcpim_mod_s *fcpim; /* fcpim module */
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struct bfa_itnim_iostats_s stats;
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struct bfa_itnim_ioprofile_s ioprofile;
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};
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#define bfa_itnim_is_online(_itnim) ((_itnim)->is_online)
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#define BFA_FCPIM_MOD(_hal) (&(_hal)->modules.fcpim_mod)
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#define BFA_IOIM_FROM_TAG(_fcpim, _iotag) \
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(&fcpim->ioim_arr[(_iotag & BFA_IOIM_RETRY_TAG_MASK)])
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#define BFA_TSKIM_FROM_TAG(_fcpim, _tmtag) \
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(&fcpim->tskim_arr[_tmtag & (fcpim->num_tskim_reqs - 1)])
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#define bfa_io_profile_start_time(_bfa) \
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(_bfa->modules.fcpim_mod.io_profile_start_time)
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#define bfa_fcpim_get_io_profile(_bfa) \
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(_bfa->modules.fcpim_mod.io_profile)
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static inline bfa_boolean_t
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bfa_ioim_get_iotag(struct bfa_ioim_s *ioim)
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{
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u16 k = ioim->iotag;
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k >>= BFA_IOIM_RETRY_TAG_OFFSET; k++;
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if (k > BFA_IOIM_RETRY_MAX)
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return BFA_FALSE;
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ioim->iotag &= BFA_IOIM_RETRY_TAG_MASK;
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ioim->iotag |= k<<BFA_IOIM_RETRY_TAG_OFFSET;
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return BFA_TRUE;
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}
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/*
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* function prototypes
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*/
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void bfa_ioim_attach(struct bfa_fcpim_mod_s *fcpim,
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struct bfa_meminfo_s *minfo);
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void bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
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void bfa_ioim_good_comp_isr(struct bfa_s *bfa,
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struct bfi_msg_s *msg);
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void bfa_ioim_cleanup(struct bfa_ioim_s *ioim);
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void bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim,
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struct bfa_tskim_s *tskim);
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void bfa_ioim_iocdisable(struct bfa_ioim_s *ioim);
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void bfa_ioim_tov(struct bfa_ioim_s *ioim);
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void bfa_tskim_attach(struct bfa_fcpim_mod_s *fcpim,
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struct bfa_meminfo_s *minfo);
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void bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
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void bfa_tskim_iodone(struct bfa_tskim_s *tskim);
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void bfa_tskim_iocdisable(struct bfa_tskim_s *tskim);
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void bfa_tskim_cleanup(struct bfa_tskim_s *tskim);
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void bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
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u32 *dm_len);
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void bfa_itnim_attach(struct bfa_fcpim_mod_s *fcpim,
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struct bfa_meminfo_s *minfo);
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void bfa_itnim_detach(struct bfa_fcpim_mod_s *fcpim);
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void bfa_itnim_iocdisable(struct bfa_itnim_s *itnim);
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void bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
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void bfa_itnim_iodone(struct bfa_itnim_s *itnim);
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void bfa_itnim_tskdone(struct bfa_itnim_s *itnim);
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bfa_boolean_t bfa_itnim_hold_io(struct bfa_itnim_s *itnim);
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/*
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* bfa fcpim module API functions
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*/
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void bfa_fcpim_path_tov_set(struct bfa_s *bfa, u16 path_tov);
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u16 bfa_fcpim_path_tov_get(struct bfa_s *bfa);
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u16 bfa_fcpim_qdepth_get(struct bfa_s *bfa);
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#define bfa_fcpim_ioredirect_enabled(__bfa) \
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(((struct bfa_fcpim_mod_s *)(BFA_FCPIM_MOD(__bfa)))->ioredirect)
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#define bfa_fcpim_get_next_reqq(__bfa, __qid) \
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{ \
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struct bfa_fcpim_mod_s *__fcpim = BFA_FCPIM_MOD(__bfa); \
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__fcpim->reqq++; \
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__fcpim->reqq &= (BFI_IOC_MAX_CQS - 1); \
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*(__qid) = __fcpim->reqq; \
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}
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#define bfa_iocfc_map_msg_to_qid(__msg, __qid) \
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*(__qid) = (u8)((__msg) & (BFI_IOC_MAX_CQS - 1));
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/*
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* bfa itnim API functions
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*/
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struct bfa_itnim_s *bfa_itnim_create(struct bfa_s *bfa,
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struct bfa_rport_s *rport, void *itnim);
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void bfa_itnim_delete(struct bfa_itnim_s *itnim);
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void bfa_itnim_online(struct bfa_itnim_s *itnim, bfa_boolean_t seq_rec);
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void bfa_itnim_offline(struct bfa_itnim_s *itnim);
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void bfa_itnim_clear_stats(struct bfa_itnim_s *itnim);
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bfa_status_t bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim,
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struct bfa_itnim_ioprofile_s *ioprofile);
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#define bfa_itnim_get_reqq(__ioim) (((struct bfa_ioim_s *)__ioim)->itnim->reqq)
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/*
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* BFA completion callback for bfa_itnim_online().
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*/
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void bfa_cb_itnim_online(void *itnim);
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/*
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* BFA completion callback for bfa_itnim_offline().
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*/
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void bfa_cb_itnim_offline(void *itnim);
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void bfa_cb_itnim_tov_begin(void *itnim);
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void bfa_cb_itnim_tov(void *itnim);
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/*
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* BFA notification to FCS/driver for second level error recovery.
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* Atleast one I/O request has timedout and target is unresponsive to
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* repeated abort requests. Second level error recovery should be initiated
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* by starting implicit logout and recovery procedures.
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*/
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void bfa_cb_itnim_sler(void *itnim);
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/*
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* bfa ioim API functions
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*/
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struct bfa_ioim_s *bfa_ioim_alloc(struct bfa_s *bfa,
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struct bfad_ioim_s *dio,
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struct bfa_itnim_s *itnim,
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u16 nsgles);
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void bfa_ioim_free(struct bfa_ioim_s *ioim);
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void bfa_ioim_start(struct bfa_ioim_s *ioim);
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bfa_status_t bfa_ioim_abort(struct bfa_ioim_s *ioim);
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void bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim,
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bfa_boolean_t iotov);
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/*
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* I/O completion notification.
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*
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* @param[in] dio driver IO structure
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* @param[in] io_status IO completion status
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* @param[in] scsi_status SCSI status returned by target
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* @param[in] sns_len SCSI sense length, 0 if none
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* @param[in] sns_info SCSI sense data, if any
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* @param[in] residue Residual length
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*
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* @return None
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*/
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void bfa_cb_ioim_done(void *bfad, struct bfad_ioim_s *dio,
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enum bfi_ioim_status io_status,
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u8 scsi_status, int sns_len,
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u8 *sns_info, s32 residue);
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/*
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* I/O good completion notification.
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*/
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void bfa_cb_ioim_good_comp(void *bfad, struct bfad_ioim_s *dio);
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/*
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* I/O abort completion notification
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*/
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void bfa_cb_ioim_abort(void *bfad, struct bfad_ioim_s *dio);
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/*
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* bfa tskim API functions
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*/
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struct bfa_tskim_s *bfa_tskim_alloc(struct bfa_s *bfa,
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struct bfad_tskim_s *dtsk);
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void bfa_tskim_free(struct bfa_tskim_s *tskim);
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void bfa_tskim_start(struct bfa_tskim_s *tskim,
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struct bfa_itnim_s *itnim, struct scsi_lun lun,
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enum fcp_tm_cmnd tm, u8 t_secs);
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void bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
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enum bfi_tskim_status tsk_status);
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#endif /* __BFA_FCPIM_H__ */
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