drivers/scsi/bfa/bfa_fcpim.h

   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
  27 /* FCP module related definitions */
  28 #define BFA_IO_MAX      BFI_IO_MAX
  29 #define BFA_FWTIO_MAX   2000
  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);
  44 void bfa_iotag_attach(struct bfa_fcp_mod_s *fcp);
  45 void bfa_fcp_res_recfg(struct bfa_s *bfa, u16 num_ioim_fw);
  46
  47 #define BFA_FCP_MOD(_hal)       (&(_hal)->modules.fcp_mod)
  48 #define BFA_MEM_FCP_KVA(__bfa)  (&(BFA_FCP_MOD(__bfa)->kva_seg))
  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) \
  54         bfa_mem_get_dmabuf_kva(_fcp, _tag, BFI_IOIM_SNSLEN)
  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
  72 #define BFA_IOIM_IOTAG_MASK 0x07ff /* 2K IOs */
  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;
  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         }
  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 typedef bfa_boolean_t (*bfa_ioim_lm_proc_rsp_data_t) (struct bfa_ioim_s *ioim);
 114
 115 struct bfa_fcpim_s {
 116         struct bfa_s            *bfa;
 117         struct bfa_fcp_mod_s    *fcp;
 118         struct bfa_itnim_s      *itnim_arr;
 119         struct bfa_ioim_s       *ioim_arr;
 120         struct bfa_ioim_sp_s    *ioim_sp_arr;
 121         struct bfa_tskim_s      *tskim_arr;
 122         int                     num_itnims;
 123         int                     num_tskim_reqs;
 124         u32                     path_tov;
 125         u16                     q_depth;
 126         u8                      reqq;           /*  Request queue to be used */
 127         u8                      lun_masking_pending;
 128         struct list_head        itnim_q;        /*  queue of active itnim */
 129         struct list_head        ioim_resfree_q; /*  IOs waiting for f/w */
 130         struct list_head        ioim_comp_q;    /*  IO global comp Q    */
 131         struct list_head        tskim_free_q;
 132         struct list_head        tskim_unused_q; /* Unused tskim Q */
 133         u32                     ios_active;     /*  current active IOs  */
 134         u32                     delay_comp;
 135         struct bfa_fcpim_del_itn_stats_s del_itn_stats;
 136         bfa_boolean_t           ioredirect;
 137         bfa_boolean_t           io_profile;
 138         u32                     io_profile_start_time;
 139         bfa_fcpim_profile_t     profile_comp;
 140         bfa_fcpim_profile_t     profile_start;
 141 };
 142
 143 /* Max FCP dma segs required */
 144 #define BFA_FCP_DMA_SEGS        BFI_IOIM_SNSBUF_SEGS
 145
 146 struct bfa_fcp_mod_s {
 147         struct bfa_s            *bfa;
 148         struct list_head        iotag_ioim_free_q;      /* free IO resources */
 149         struct list_head        iotag_tio_free_q;       /* free IO resources */
 150         struct list_head        iotag_unused_q; /* unused IO resources*/
 151         struct bfa_iotag_s      *iotag_arr;
 152         struct bfa_itn_s        *itn_arr;
 153         int                     num_ioim_reqs;
 154         int                     num_fwtio_reqs;
 155         int                     num_itns;
 156         struct bfa_dma_s        snsbase[BFA_FCP_DMA_SEGS];
 157         struct bfa_fcpim_s      fcpim;
 158         struct bfa_mem_dma_s    dma_seg[BFA_FCP_DMA_SEGS];
 159         struct bfa_mem_kva_s    kva_seg;
 160 };
 161
 162 /*
 163  * BFA IO (initiator mode)
 164  */
 165 struct bfa_ioim_s {
 166         struct list_head        qe;             /*  queue elememt       */
 167         bfa_sm_t                sm;             /*  BFA ioim state machine */
 168         struct bfa_s            *bfa;           /*  BFA module  */
 169         struct bfa_fcpim_s      *fcpim;         /*  parent fcpim module */
 170         struct bfa_itnim_s      *itnim;         /*  i-t-n nexus for this IO  */
 171         struct bfad_ioim_s      *dio;           /*  driver IO handle    */
 172         u16                     iotag;          /*  FWI IO tag  */
 173         u16                     abort_tag;      /*  unqiue abort request tag */
 174         u16                     nsges;          /*  number of SG elements */
 175         u16                     nsgpgs;         /*  number of SG pages  */
 176         struct bfa_sgpg_s       *sgpg;          /*  first SG page       */
 177         struct list_head        sgpg_q;         /*  allocated SG pages  */
 178         struct bfa_cb_qe_s      hcb_qe;         /*  bfa callback qelem  */
 179         bfa_cb_cbfn_t           io_cbfn;        /*  IO completion handler */
 180         struct bfa_ioim_sp_s    *iosp;          /*  slow-path IO handling */
 181         u8                      reqq;           /*  Request queue for I/O */
 182         u8                      mode;           /*  IO is passthrough or not */
 183         u64                     start_time;     /*  IO's Profile start val */
 184         bfa_ioim_lm_proc_rsp_data_t proc_rsp_data; /* RSP data adjust */
 185 };
 186
 187 struct bfa_ioim_sp_s {
 188         struct bfi_msg_s        comp_rspmsg;    /*  IO comp f/w response */
 189         struct bfa_sgpg_wqe_s   sgpg_wqe;       /*  waitq elem for sgpg */
 190         struct bfa_reqq_wait_s  reqq_wait;      /*  to wait for room in reqq */
 191         bfa_boolean_t           abort_explicit; /*  aborted by OS       */
 192         struct bfa_tskim_s      *tskim;         /*  Relevant TM cmd     */
 193 };
 194
 195 /*
 196  * BFA Task management command (initiator mode)
 197  */
 198 struct bfa_tskim_s {
 199         struct list_head        qe;
 200         bfa_sm_t                sm;
 201         struct bfa_s            *bfa;   /*  BFA module  */
 202         struct bfa_fcpim_s      *fcpim; /*  parent fcpim module */
 203         struct bfa_itnim_s      *itnim; /*  i-t-n nexus for this IO  */
 204         struct bfad_tskim_s     *dtsk;  /*  driver task mgmt cmnd       */
 205         bfa_boolean_t           notify; /*  notify itnim on TM comp  */
 206         struct scsi_lun         lun;    /*  lun if applicable   */
 207         enum fcp_tm_cmnd        tm_cmnd; /*  task management command  */
 208         u16                     tsk_tag; /*  FWI IO tag */
 209         u8                      tsecs;  /*  timeout in seconds  */
 210         struct bfa_reqq_wait_s  reqq_wait;   /*  to wait for room in reqq */
 211         struct list_head        io_q;   /*  queue of affected IOs       */
 212         struct bfa_wc_s         wc;     /*  waiting counter     */
 213         struct bfa_cb_qe_s      hcb_qe; /*  bfa callback qelem  */
 214         enum bfi_tskim_status   tsk_status;  /*  TM status      */
 215 };
 216
 217 /*
 218  * BFA i-t-n (initiator mode)
 219  */
 220 struct bfa_itnim_s {
 221         struct list_head        qe;     /*  queue element       */
 222         bfa_sm_t                sm;     /*  i-t-n im BFA state machine  */
 223         struct bfa_s            *bfa;   /*  bfa instance        */
 224         struct bfa_rport_s      *rport; /*  bfa rport   */
 225         void                    *ditn;  /*  driver i-t-n structure      */
 226         struct bfi_mhdr_s       mhdr;   /*  pre-built mhdr      */
 227         u8                      msg_no; /*  itnim/rport firmware handle */
 228         u8                      reqq;   /*  CQ for requests     */
 229         struct bfa_cb_qe_s      hcb_qe; /*  bfa callback qelem  */
 230         struct list_head pending_q;     /*  queue of pending IO requests */
 231         struct list_head io_q;          /*  queue of active IO requests */
 232         struct list_head io_cleanup_q;  /*  IO being cleaned up */
 233         struct list_head tsk_q;         /*  queue of active TM commands */
 234         struct list_head  delay_comp_q; /*  queue of failed inflight cmds */
 235         bfa_boolean_t   seq_rec;        /*  SQER supported      */
 236         bfa_boolean_t   is_online;      /*  itnim is ONLINE for IO      */
 237         bfa_boolean_t   iotov_active;   /*  IO TOV timer is active       */
 238         struct bfa_wc_s wc;             /*  waiting counter     */
 239         struct bfa_timer_s timer;       /*  pending IO TOV       */
 240         struct bfa_reqq_wait_s reqq_wait; /*  to wait for room in reqq */
 241         struct bfa_fcpim_s *fcpim;      /*  fcpim module        */
 242         struct bfa_itnim_iostats_s      stats;
 243         struct bfa_itnim_ioprofile_s  ioprofile;
 244 };
 245
 246 #define bfa_itnim_is_online(_itnim) ((_itnim)->is_online)
 247 #define BFA_FCPIM(_hal) (&(_hal)->modules.fcp_mod.fcpim)
 248 #define BFA_IOIM_TAG_2_ID(_iotag)       ((_iotag) & BFA_IOIM_IOTAG_MASK)
 249 #define BFA_IOIM_FROM_TAG(_fcpim, _iotag)       \
 250         (&fcpim->ioim_arr[(_iotag & BFA_IOIM_IOTAG_MASK)])
 251 #define BFA_TSKIM_FROM_TAG(_fcpim, _tmtag)      \
 252         (&fcpim->tskim_arr[_tmtag & (fcpim->num_tskim_reqs - 1)])
 253
 254 #define bfa_io_profile_start_time(_bfa) \
 255         ((_bfa)->modules.fcp_mod.fcpim.io_profile_start_time)
 256 #define bfa_fcpim_get_io_profile(_bfa)  \
 257         ((_bfa)->modules.fcp_mod.fcpim.io_profile)
 258 #define bfa_ioim_update_iotag(__ioim) do {                              \
 259         uint16_t k = (__ioim)->iotag >> BFA_IOIM_RETRY_TAG_OFFSET;      \
 260         k++; (__ioim)->iotag &= BFA_IOIM_IOTAG_MASK;                    \
 261         (__ioim)->iotag |= k << BFA_IOIM_RETRY_TAG_OFFSET;              \
 262 } while (0)
 263
 264 #define BFA_IOIM_TO_LPS(__ioim)         \
 265         BFA_LPS_FROM_TAG(BFA_LPS_MOD(__ioim->bfa),      \
 266                 __ioim->itnim->rport->rport_info.lp_tag)
 267
 268 static inline bfa_boolean_t
 269 bfa_ioim_maxretry_reached(struct bfa_ioim_s *ioim)
 270 {
 271         uint16_t k = ioim->iotag >> BFA_IOIM_RETRY_TAG_OFFSET;
 272         if (k < BFA_IOIM_RETRY_MAX)
 273                 return BFA_FALSE;
 274         return BFA_TRUE;
 275 }
 276
 277 /*
 278  * function prototypes
 279  */
 280 void    bfa_ioim_attach(struct bfa_fcpim_s *fcpim);
 281 void    bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
 282 void    bfa_ioim_good_comp_isr(struct bfa_s *bfa,
 283                                         struct bfi_msg_s *msg);
 284 void    bfa_ioim_cleanup(struct bfa_ioim_s *ioim);
 285 void    bfa_ioim_cleanup_tm(struct bfa_ioim_s *ioim,
 286                                         struct bfa_tskim_s *tskim);
 287 void    bfa_ioim_iocdisable(struct bfa_ioim_s *ioim);
 288 void    bfa_ioim_tov(struct bfa_ioim_s *ioim);
 289
 290 void    bfa_tskim_attach(struct bfa_fcpim_s *fcpim);
 291 void    bfa_tskim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
 292 void    bfa_tskim_iodone(struct bfa_tskim_s *tskim);
 293 void    bfa_tskim_iocdisable(struct bfa_tskim_s *tskim);
 294 void    bfa_tskim_cleanup(struct bfa_tskim_s *tskim);
 295 void    bfa_tskim_res_recfg(struct bfa_s *bfa, u16 num_tskim_fw);
 296
 297 void    bfa_itnim_meminfo(struct bfa_iocfc_cfg_s *cfg, u32 *km_len);
 298 void    bfa_itnim_attach(struct bfa_fcpim_s *fcpim);
 299 void    bfa_itnim_iocdisable(struct bfa_itnim_s *itnim);
 300 void    bfa_itnim_isr(struct bfa_s *bfa, struct bfi_msg_s *msg);
 301 void    bfa_itnim_iodone(struct bfa_itnim_s *itnim);
 302 void    bfa_itnim_tskdone(struct bfa_itnim_s *itnim);
 303 bfa_boolean_t   bfa_itnim_hold_io(struct bfa_itnim_s *itnim);
 304
 305 /*
 306  * bfa fcpim module API functions
 307  */
 308 void    bfa_fcpim_path_tov_set(struct bfa_s *bfa, u16 path_tov);
 309 u16     bfa_fcpim_path_tov_get(struct bfa_s *bfa);
 310 u16     bfa_fcpim_qdepth_get(struct bfa_s *bfa);
 311 bfa_status_t bfa_fcpim_port_iostats(struct bfa_s *bfa,
 312                         struct bfa_itnim_iostats_s *stats, u8 lp_tag);
 313 void bfa_fcpim_add_stats(struct bfa_itnim_iostats_s *fcpim_stats,
 314                         struct bfa_itnim_iostats_s *itnim_stats);
 315 bfa_status_t bfa_fcpim_profile_on(struct bfa_s *bfa, u32 time);
 316 bfa_status_t bfa_fcpim_profile_off(struct bfa_s *bfa);
 317
 318 #define bfa_fcpim_ioredirect_enabled(__bfa)                             \
 319         (((struct bfa_fcpim_s *)(BFA_FCPIM(__bfa)))->ioredirect)
 320
 321 #define bfa_fcpim_get_next_reqq(__bfa, __qid)                           \
 322 {                                                                       \
 323         struct bfa_fcpim_s *__fcpim = BFA_FCPIM(__bfa);      \
 324         __fcpim->reqq++;                                                \
 325         __fcpim->reqq &= (BFI_IOC_MAX_CQS - 1);      \
 326         *(__qid) = __fcpim->reqq;                                       \
 327 }
 328
 329 #define bfa_iocfc_map_msg_to_qid(__msg, __qid)                          \
 330         *(__qid) = (u8)((__msg) & (BFI_IOC_MAX_CQS - 1));
 331 /*
 332  * bfa itnim API functions
 333  */
 334 struct bfa_itnim_s *bfa_itnim_create(struct bfa_s *bfa,
 335                 struct bfa_rport_s *rport, void *itnim);
 336 void bfa_itnim_delete(struct bfa_itnim_s *itnim);
 337 void bfa_itnim_online(struct bfa_itnim_s *itnim, bfa_boolean_t seq_rec);
 338 void bfa_itnim_offline(struct bfa_itnim_s *itnim);
 339 void bfa_itnim_clear_stats(struct bfa_itnim_s *itnim);
 340 bfa_status_t bfa_itnim_get_ioprofile(struct bfa_itnim_s *itnim,
 341                         struct bfa_itnim_ioprofile_s *ioprofile);
 342
 343 #define bfa_itnim_get_reqq(__ioim) (((struct bfa_ioim_s *)__ioim)->itnim->reqq)
 344
 345 /*
 346  * BFA completion callback for bfa_itnim_online().
 347  */
 348 void    bfa_cb_itnim_online(void *itnim);
 349
 350 /*
 351  * BFA completion callback for bfa_itnim_offline().
 352  */
 353 void    bfa_cb_itnim_offline(void *itnim);
 354 void    bfa_cb_itnim_tov_begin(void *itnim);
 355 void    bfa_cb_itnim_tov(void *itnim);
 356
 357 /*
 358  * BFA notification to FCS/driver for second level error recovery.
 359  * Atleast one I/O request has timedout and target is unresponsive to
 360  * repeated abort requests. Second level error recovery should be initiated
 361  * by starting implicit logout and recovery procedures.
 362  */
 363 void    bfa_cb_itnim_sler(void *itnim);
 364
 365 /*
 366  * bfa ioim API functions
 367  */
 368 struct bfa_ioim_s       *bfa_ioim_alloc(struct bfa_s *bfa,
 369                                         struct bfad_ioim_s *dio,
 370                                         struct bfa_itnim_s *itnim,
 371                                         u16 nsgles);
 372
 373 void            bfa_ioim_free(struct bfa_ioim_s *ioim);
 374 void            bfa_ioim_start(struct bfa_ioim_s *ioim);
 375 bfa_status_t    bfa_ioim_abort(struct bfa_ioim_s *ioim);
 376 void            bfa_ioim_delayed_comp(struct bfa_ioim_s *ioim,
 377                                       bfa_boolean_t iotov);
 378 /*
 379  * I/O completion notification.
 380  *
 381  * @param[in]           dio                     driver IO structure
 382  * @param[in]           io_status               IO completion status
 383  * @param[in]           scsi_status             SCSI status returned by target
 384  * @param[in]           sns_len                 SCSI sense length, 0 if none
 385  * @param[in]           sns_info                SCSI sense data, if any
 386  * @param[in]           residue                 Residual length
 387  *
 388  * @return None
 389  */
 390 void bfa_cb_ioim_done(void *bfad, struct bfad_ioim_s *dio,
 391                         enum bfi_ioim_status io_status,
 392                         u8 scsi_status, int sns_len,
 393                         u8 *sns_info, s32 residue);
 394
 395 /*
 396  * I/O good completion notification.
 397  */
 398 void bfa_cb_ioim_good_comp(void *bfad, struct bfad_ioim_s *dio);
 399
 400 /*
 401  * I/O abort completion notification
 402  */
 403 void bfa_cb_ioim_abort(void *bfad, struct bfad_ioim_s *dio);
 404
 405 /*
 406  * bfa tskim API functions
 407  */
 408 struct bfa_tskim_s *bfa_tskim_alloc(struct bfa_s *bfa,
 409                         struct bfad_tskim_s *dtsk);
 410 void bfa_tskim_free(struct bfa_tskim_s *tskim);
 411 void bfa_tskim_start(struct bfa_tskim_s *tskim,
 412                         struct bfa_itnim_s *itnim, struct scsi_lun lun,
 413                         enum fcp_tm_cmnd tm, u8 t_secs);
 414 void bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
 415                         enum bfi_tskim_status tsk_status);
 416
 417 void    bfa_fcpim_lunmask_rp_update(struct bfa_s *bfa, wwn_t lp_wwn,
 418                         wwn_t rp_wwn, u16 rp_tag, u8 lp_tag);
 419 bfa_status_t    bfa_fcpim_lunmask_update(struct bfa_s *bfa, u32 on_off);
 420 bfa_status_t    bfa_fcpim_lunmask_query(struct bfa_s *bfa, void *buf);
 421 bfa_status_t    bfa_fcpim_lunmask_delete(struct bfa_s *bfa, u16 vf_id,
 422                                 wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun);
 423 bfa_status_t    bfa_fcpim_lunmask_add(struct bfa_s *bfa, u16 vf_id,
 424                                 wwn_t *pwwn, wwn_t rpwwn, struct scsi_lun lun);
 425 bfa_status_t    bfa_fcpim_lunmask_clear(struct bfa_s *bfa);
 426
 427 #endif /* __BFA_FCPIM_H__ */