drivers/scsi/bfa/bfa_fcpim_priv.h

   1 /*
   2  * Copyright (c) 2005-2009 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_PRIV_H__
  19 #define __BFA_FCPIM_PRIV_H__
  20
  21 #include <bfa_fcpim.h>
  22 #include <defs/bfa_defs_fcpim.h>
  23 #include <cs/bfa_wc.h>
  24 #include "bfa_sgpg_priv.h"
  25
  26 #define BFA_ITNIM_MIN   32
  27 #define BFA_ITNIM_MAX   1024
  28
  29 #define BFA_IOIM_MIN    8
  30 #define BFA_IOIM_MAX    2000
  31
  32 #define BFA_TSKIM_MIN   4
  33 #define BFA_TSKIM_MAX   512
  34 #define BFA_FCPIM_PATHTOV_DEF   (30 * 1000)     /* in millisecs */
  35 #define BFA_FCPIM_PATHTOV_MAX   (90 * 1000)     /* in millisecs */
  36
  37 #define bfa_fcpim_stats(__fcpim, __stats)   \
  38     (__fcpim)->stats.__stats ++
  39
  40 struct bfa_fcpim_mod_s {
  41         struct bfa_s    *bfa;
  42         struct bfa_itnim_s      *itnim_arr;
  43         struct bfa_ioim_s       *ioim_arr;
  44         struct bfa_ioim_sp_s *ioim_sp_arr;
  45         struct bfa_tskim_s      *tskim_arr;
  46         struct bfa_dma_s        snsbase;
  47         int                     num_itnims;
  48         int                     num_ioim_reqs;
  49         int                     num_tskim_reqs;
  50         u32             path_tov;
  51         u16             q_depth;
  52         u16             rsvd;
  53         struct list_head        itnim_q;        /*  queue of active itnim    */
  54         struct list_head        ioim_free_q;    /*  free IO resources        */
  55         struct list_head        ioim_resfree_q; /*  IOs waiting for f/w      */
  56         struct list_head        ioim_comp_q;    /*  IO global comp Q         */
  57         struct list_head        tskim_free_q;
  58         u32     ios_active;     /*  current active IOs        */
  59         u32     delay_comp;
  60         struct bfa_fcpim_stats_s stats;
  61 };
  62
  63 struct bfa_ioim_s;
  64 struct bfa_tskim_s;
  65
  66 /**
  67  * BFA IO (initiator mode)
  68  */
  69 struct bfa_ioim_s {
  70         struct list_head qe;            /*  queue elememt            */
  71         bfa_sm_t                sm;     /*  BFA ioim state machine   */
  72         struct bfa_s            *bfa;   /*  BFA module               */
  73         struct bfa_fcpim_mod_s  *fcpim; /*  parent fcpim module      */
  74         struct bfa_itnim_s      *itnim; /*  i-t-n nexus for this IO  */
  75         struct bfad_ioim_s      *dio;   /*  driver IO handle         */
  76         u16     iotag;          /*  FWI IO tag               */
  77         u16     abort_tag;      /*  unqiue abort request tag */
  78         u16     nsges;          /*  number of SG elements    */
  79         u16     nsgpgs;         /*  number of SG pages       */
  80         struct bfa_sgpg_s *sgpg;        /*  first SG page            */
  81         struct list_head sgpg_q;                /*  allocated SG pages       */
  82         struct bfa_cb_qe_s hcb_qe;      /*  bfa callback qelem       */
  83         bfa_cb_cbfn_t io_cbfn;          /*  IO completion handler    */
  84         struct bfa_ioim_sp_s *iosp;     /*  slow-path IO handling    */
  85 };
  86
  87 struct bfa_ioim_sp_s {
  88         struct bfi_msg_s        comp_rspmsg;    /*  IO comp f/w response     */
  89         u8                      *snsinfo;       /*  sense info for this IO   */
  90         struct bfa_sgpg_wqe_s sgpg_wqe; /*  waitq elem for sgpg      */
  91         struct bfa_reqq_wait_s reqq_wait;       /*  to wait for room in reqq */
  92         bfa_boolean_t           abort_explicit; /*  aborted by OS            */
  93         struct bfa_tskim_s      *tskim;         /*  Relevant TM cmd          */
  94 };
  95
  96 /**
  97  * BFA Task management command (initiator mode)
  98  */
  99 struct bfa_tskim_s {
 100         struct list_head          qe;
 101         bfa_sm_t                sm;
 102         struct bfa_s            *bfa;        /*  BFA module  */
 103         struct bfa_fcpim_mod_s  *fcpim;      /*  parent fcpim module      */
 104         struct bfa_itnim_s      *itnim;      /*  i-t-n nexus for this IO  */
 105         struct bfad_tskim_s         *dtsk;   /*  driver task mgmt cmnd    */
 106         bfa_boolean_t        notify;         /*  notify itnim on TM comp  */
 107         lun_t                lun;            /*  lun if applicable        */
 108         enum fcp_tm_cmnd        tm_cmnd;     /*  task management command  */
 109         u16             tsk_tag;        /*  FWI IO tag               */
 110         u8              tsecs;          /*  timeout in seconds       */
 111         struct bfa_reqq_wait_s  reqq_wait;   /*  to wait for room in reqq */
 112         struct list_head              io_q;    /*  queue of affected IOs    */
 113         struct bfa_wc_s             wc;      /*  waiting counter          */
 114         struct bfa_cb_qe_s      hcb_qe;      /*  bfa callback qelem       */
 115         enum bfi_tskim_status   tsk_status;  /*  TM status                */
 116 };
 117
 118 /**
 119  * BFA i-t-n (initiator mode)
 120  */
 121 struct bfa_itnim_s {
 122         struct list_head    qe;         /*  queue element               */
 123         bfa_sm_t          sm;           /*  i-t-n im BFA state machine  */
 124         struct bfa_s      *bfa;         /*  bfa instance                */
 125         struct bfa_rport_s *rport;      /*  bfa rport                   */
 126         void           *ditn;           /*  driver i-t-n structure      */
 127         struct bfi_mhdr_s      mhdr;    /*  pre-built mhdr              */
 128         u8         msg_no;              /*  itnim/rport firmware handle */
 129         u8         reqq;                /*  CQ for requests             */
 130         struct bfa_cb_qe_s    hcb_qe;   /*  bfa callback qelem          */
 131         struct list_head pending_q;     /*  queue of pending IO requests*/
 132         struct list_head io_q;          /*  queue of active IO requests */
 133         struct list_head io_cleanup_q;  /*  IO being cleaned up         */
 134         struct list_head tsk_q;         /*  queue of active TM commands */
 135         struct list_head  delay_comp_q;/*  queue of failed inflight cmds */
 136         bfa_boolean_t   seq_rec;        /*  SQER supported              */
 137         bfa_boolean_t   is_online;      /*  itnim is ONLINE for IO      */
 138         bfa_boolean_t   iotov_active;   /*  IO TOV timer is active       */
 139         struct bfa_wc_s        wc;      /*  waiting counter             */
 140         struct bfa_timer_s timer;       /*  pending IO TOV               */
 141         struct bfa_reqq_wait_s reqq_wait; /*  to wait for room in reqq */
 142         struct bfa_fcpim_mod_s *fcpim;  /*  fcpim module                */
 143         struct bfa_itnim_hal_stats_s    stats;
 144 };
 145
 146 #define bfa_itnim_is_online(_itnim) (_itnim)->is_online
 147 #define BFA_FCPIM_MOD(_hal) (&(_hal)->modules.fcpim_mod)
 148 #define BFA_IOIM_FROM_TAG(_fcpim, _iotag)       \
 149         (&fcpim->ioim_arr[_iotag])
 150 #define BFA_TSKIM_FROM_TAG(_fcpim, _tmtag)                  \
 151     (&fcpim->tskim_arr[_tmtag & (fcpim->num_tskim_reqs - 1)])
 152
 153 /*
 154  * function prototypes
 155  */
 156 void            bfa_ioim_attach(struct bfa_fcpim_mod_s *fcpim,
 157                                     struct bfa_meminfo_s *minfo);
 158 void            bfa_ioim_detach(struct bfa_fcpim_mod_s *fcpim);
 159 void            bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
 160 void            bfa_ioim_good_comp_isr(struct bfa_s *bfa,
 161                                         struct bfi_msg_s *msg);
 162 void            bfa_ioim_cleanup(struct bfa_ioim_s *ioim);
 163 void            bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim,
 164                                         struct bfa_tskim_s *tskim);
 165 void            bfa_ioim_iocdisable(struct bfa_ioim_s *ioim);
 166 void            bfa_ioim_tov(struct bfa_ioim_s *ioim);
 167
 168 void            bfa_tskim_attach(struct bfa_fcpim_mod_s *fcpim,
 169                                      struct bfa_meminfo_s *minfo);
 170 void            bfa_tskim_detach(struct bfa_fcpim_mod_s *fcpim);
 171 void            bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
 172 void            bfa_tskim_iodone(struct bfa_tskim_s *tskim);
 173 void            bfa_tskim_iocdisable(struct bfa_tskim_s *tskim);
 174 void            bfa_tskim_cleanup(struct bfa_tskim_s *tskim);
 175
 176 void            bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len,
 177                                       u32 *dm_len);
 178 void            bfa_itnim_attach(struct bfa_fcpim_mod_s *fcpim,
 179                                      struct bfa_meminfo_s *minfo);
 180 void            bfa_itnim_detach(struct bfa_fcpim_mod_s *fcpim);
 181 void            bfa_itnim_iocdisable(struct bfa_itnim_s *itnim);
 182 void            bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
 183 void            bfa_itnim_iodone(struct bfa_itnim_s *itnim);
 184 void            bfa_itnim_tskdone(struct bfa_itnim_s *itnim);
 185 bfa_boolean_t   bfa_itnim_hold_io(struct bfa_itnim_s *itnim);
 186
 187 #endif /* __BFA_FCPIM_PRIV_H__ */
 188