drivers/scsi/lpfc/lpfc_sli.h

   1 /*******************************************************************
   2  * This file is part of the Emulex Linux Device Driver for         *
   3  * Fibre Channel Host Bus Adapters.                                *
   4  * Copyright (C) 2004-2007 Emulex.  All rights reserved.           *
   5  * EMULEX and SLI are trademarks of Emulex.                        *
   6  * www.emulex.com                                                  *
   7  *                                                                 *
   8  * This program is free software; you can redistribute it and/or   *
   9  * modify it under the terms of version 2 of the GNU General       *
  10  * Public License as published by the Free Software Foundation.    *
  11  * This program is distributed in the hope that it will be useful. *
  12  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  13  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  14  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  15  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  16  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  17  * more details, a copy of which can be found in the file COPYING  *
  18  * included with this package.                                     *
  19  *******************************************************************/
  20
  21 /* forward declaration for LPFC_IOCB_t's use */
  22 struct lpfc_hba;
  23 struct lpfc_vport;
  24
  25 /* Define the context types that SLI handles for abort and sums. */
  26 typedef enum _lpfc_ctx_cmd {
  27         LPFC_CTX_LUN,
  28         LPFC_CTX_TGT,
  29         LPFC_CTX_HOST
  30 } lpfc_ctx_cmd;
  31
  32 /* This structure is used to handle IOCB requests / responses */
  33 struct lpfc_iocbq {
  34         /* lpfc_iocbqs are used in double linked lists */
  35         struct list_head list;
  36         uint16_t iotag;         /* pre-assigned IO tag */
  37         uint16_t rsvd1;
  38
  39         IOCB_t iocb;            /* IOCB cmd */
  40         uint8_t retry;          /* retry counter for IOCB cmd - if needed */
  41         uint8_t iocb_flag;
  42 #define LPFC_IO_LIBDFC          1       /* libdfc iocb */
  43 #define LPFC_IO_WAKE            2       /* High Priority Queue signal flag */
  44 #define LPFC_IO_FCP             4       /* FCP command -- iocbq in scsi_buf */
  45 #define LPFC_DRIVER_ABORTED     8       /* driver aborted this request */
  46 #define LPFC_IO_FABRIC          0x10    /* Iocb send using fabric scheduler */
  47
  48         uint8_t abort_count;
  49         uint8_t rsvd2;
  50         uint32_t drvrTimeout;   /* driver timeout in seconds */
  51         struct lpfc_vport *vport;/* virtual port pointer */
  52         void *context1;         /* caller context information */
  53         void *context2;         /* caller context information */
  54         void *context3;         /* caller context information */
  55         union {
  56                 wait_queue_head_t    *wait_queue;
  57                 struct lpfc_iocbq    *rsp_iocb;
  58                 struct lpfcMboxq     *mbox;
  59                 struct lpfc_nodelist *ndlp;
  60         } context_un;
  61
  62         void (*fabric_iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
  63                            struct lpfc_iocbq *);
  64         void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
  65                            struct lpfc_iocbq *);
  66
  67 };
  68
  69 #define SLI_IOCB_RET_IOCB      1        /* Return IOCB if cmd ring full */
  70
  71 #define IOCB_SUCCESS        0
  72 #define IOCB_BUSY           1
  73 #define IOCB_ERROR          2
  74 #define IOCB_TIMEDOUT       3
  75
  76 #define LPFC_MBX_WAKE           1
  77 #define LPFC_MBX_IMED_UNREG     2
  78
  79 typedef struct lpfcMboxq {
  80         /* MBOXQs are used in single linked lists */
  81         struct list_head list;  /* ptr to next mailbox command */
  82         MAILBOX_t mb;           /* Mailbox cmd */
  83         struct lpfc_vport *vport;/* virutal port pointer */
  84         void *context1;         /* caller context information */
  85         void *context2;         /* caller context information */
  86
  87         void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
  88         uint8_t mbox_flag;
  89
  90 } LPFC_MBOXQ_t;
  91
  92 #define MBX_POLL        1       /* poll mailbox till command done, then
  93                                    return */
  94 #define MBX_NOWAIT      2       /* issue command then return immediately */
  95 #define MBX_STOP_IOCB   4       /* Stop iocb processing till mbox cmds
  96                                    complete */
  97
  98 #define LPFC_MAX_RING_MASK  4   /* max num of rctl/type masks allowed per
  99                                    ring */
 100 #define LPFC_MAX_RING       4   /* max num of SLI rings used by driver */
 101
 102 struct lpfc_sli_ring;
 103
 104 struct lpfc_sli_ring_mask {
 105         uint8_t profile;        /* profile associated with ring */
 106         uint8_t rctl;   /* rctl / type pair configured for ring */
 107         uint8_t type;   /* rctl / type pair configured for ring */
 108         uint8_t rsvd;
 109         /* rcv'd unsol event */
 110         void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
 111                                          struct lpfc_sli_ring *,
 112                                          struct lpfc_iocbq *);
 113 };
 114
 115
 116 /* Structure used to hold SLI statistical counters and info */
 117 struct lpfc_sli_ring_stat {
 118         uint64_t iocb_event;     /* IOCB event counters */
 119         uint64_t iocb_cmd;       /* IOCB cmd issued */
 120         uint64_t iocb_rsp;       /* IOCB rsp received */
 121         uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
 122         uint64_t iocb_cmd_full;  /* IOCB cmd ring full */
 123         uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
 124         uint64_t iocb_rsp_full;  /* IOCB rsp ring full */
 125 };
 126
 127 /* Structure used to hold SLI ring information */
 128 struct lpfc_sli_ring {
 129         uint16_t flag;          /* ring flags */
 130 #define LPFC_DEFERRED_RING_EVENT 0x001  /* Deferred processing a ring event */
 131 #define LPFC_CALL_RING_AVAILABLE 0x002  /* indicates cmd was full */
 132 #define LPFC_STOP_IOCB_MBX       0x010  /* Stop processing IOCB cmds mbox */
 133 #define LPFC_STOP_IOCB_EVENT     0x020  /* Stop processing IOCB cmds event */
 134 #define LPFC_STOP_IOCB_MASK      0x030  /* Stop processing IOCB cmds mask */
 135         uint16_t abtsiotag;     /* tracks next iotag to use for ABTS */
 136
 137         uint32_t local_getidx;   /* last available cmd index (from cmdGetInx) */
 138         uint32_t next_cmdidx;    /* next_cmd index */
 139         uint32_t rspidx;        /* current index in response ring */
 140         uint32_t cmdidx;        /* current index in command ring */
 141         uint8_t rsvd;
 142         uint8_t ringno;         /* ring number */
 143         uint16_t numCiocb;      /* number of command iocb's per ring */
 144         uint16_t numRiocb;      /* number of rsp iocb's per ring */
 145         uint16_t sizeCiocb;     /* Size of command iocb's in this ring */
 146         uint16_t sizeRiocb;     /* Size of response iocb's in this ring */
 147
 148         uint32_t fast_iotag;    /* max fastlookup based iotag           */
 149         uint32_t iotag_ctr;     /* keeps track of the next iotag to use */
 150         uint32_t iotag_max;     /* max iotag value to use               */
 151         struct list_head txq;
 152         uint16_t txq_cnt;       /* current length of queue */
 153         uint16_t txq_max;       /* max length */
 154         struct list_head txcmplq;
 155         uint16_t txcmplq_cnt;   /* current length of queue */
 156         uint16_t txcmplq_max;   /* max length */
 157         uint32_t *cmdringaddr;  /* virtual address for cmd rings */
 158         uint32_t *rspringaddr;  /* virtual address for rsp rings */
 159         uint32_t missbufcnt;    /* keep track of buffers to post */
 160         struct list_head postbufq;
 161         uint16_t postbufq_cnt;  /* current length of queue */
 162         uint16_t postbufq_max;  /* max length */
 163         struct list_head iocb_continueq;
 164         uint16_t iocb_continueq_cnt;    /* current length of queue */
 165         uint16_t iocb_continueq_max;    /* max length */
 166
 167         struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
 168         uint32_t num_mask;      /* number of mask entries in prt array */
 169
 170         struct lpfc_sli_ring_stat stats;        /* SLI statistical info */
 171
 172         /* cmd ring available */
 173         void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
 174                                         struct lpfc_sli_ring *);
 175 };
 176
 177 /* Structure used for configuring rings to a specific profile or rctl / type */
 178 struct lpfc_hbq_init {
 179         uint32_t rn;            /* Receive buffer notification */
 180         uint32_t entry_count;   /* max # of entries in HBQ */
 181         uint32_t headerLen;     /* 0 if not profile 4 or 5 */
 182         uint32_t logEntry;      /* Set to 1 if this HBQ used for LogEntry */
 183         uint32_t profile;       /* Selection profile 0=all, 7=logentry */
 184         uint32_t ring_mask;     /* Binds HBQ to a ring e.g. Ring0=b0001,
 185                                  * ring2=b0100 */
 186         uint32_t hbq_index;     /* index of this hbq in ring .HBQs[] */
 187
 188         uint32_t seqlenoff;
 189         uint32_t maxlen;
 190         uint32_t seqlenbcnt;
 191         uint32_t cmdcodeoff;
 192         uint32_t cmdmatch[8];
 193         uint32_t mask_count;    /* number of mask entries in prt array */
 194         struct hbq_mask hbqMasks[6];
 195
 196         /* Non-config rings fields to keep track of buffer allocations */
 197         uint32_t buffer_count;  /* number of buffers allocated */
 198         uint32_t init_count;    /* number to allocate when initialized */
 199         uint32_t add_count;     /* number to allocate when starved */
 200 } ;
 201
 202 #define LPFC_MAX_HBQ 16
 203
 204
 205 /* Structure used to hold SLI statistical counters and info */
 206 struct lpfc_sli_stat {
 207         uint64_t mbox_stat_err;  /* Mbox cmds completed status error */
 208         uint64_t mbox_cmd;       /* Mailbox commands issued */
 209         uint64_t sli_intr;       /* Count of Host Attention interrupts */
 210         uint32_t err_attn_event; /* Error Attn event counters */
 211         uint32_t link_event;     /* Link event counters */
 212         uint32_t mbox_event;     /* Mailbox event counters */
 213         uint32_t mbox_busy;      /* Mailbox cmd busy */
 214 };
 215
 216 /* Structure to store link status values when port stats are reset */
 217 struct lpfc_lnk_stat {
 218         uint32_t link_failure_count;
 219         uint32_t loss_of_sync_count;
 220         uint32_t loss_of_signal_count;
 221         uint32_t prim_seq_protocol_err_count;
 222         uint32_t invalid_tx_word_count;
 223         uint32_t invalid_crc_count;
 224         uint32_t error_frames;
 225         uint32_t link_events;
 226 };
 227
 228 /* Structure used to hold SLI information */
 229 struct lpfc_sli {
 230         uint32_t num_rings;
 231         uint32_t sli_flag;
 232
 233         /* Additional sli_flags */
 234 #define LPFC_SLI_MBOX_ACTIVE      0x100 /* HBA mailbox is currently active */
 235 #define LPFC_SLI2_ACTIVE          0x200 /* SLI2 overlay in firmware is active */
 236 #define LPFC_PROCESS_LA           0x400 /* Able to process link attention */
 237 #define LPFC_BLOCK_MGMT_IO        0x800 /* Don't allow mgmt mbx or iocb cmds */
 238
 239         struct lpfc_sli_ring ring[LPFC_MAX_RING];
 240         int fcp_ring;           /* ring used for FCP initiator commands */
 241         int next_ring;
 242
 243         int extra_ring;         /* extra ring used for other protocols */
 244
 245         struct lpfc_sli_stat slistat;   /* SLI statistical info */
 246         struct list_head mboxq;
 247         uint16_t mboxq_cnt;     /* current length of queue */
 248         uint16_t mboxq_max;     /* max length */
 249         LPFC_MBOXQ_t *mbox_active;      /* active mboxq information */
 250         struct list_head mboxq_cmpl;
 251
 252         struct timer_list mbox_tmo;     /* Hold clk to timeout active mbox
 253                                            cmd */
 254
 255 #define LPFC_IOCBQ_LOOKUP_INCREMENT  1024
 256         struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
 257         size_t iocbq_lookup_len;           /* current lengs of the array */
 258         uint16_t  last_iotag;              /* last allocated IOTAG */
 259         unsigned long  stats_start;        /* in seconds */
 260         struct lpfc_lnk_stat lnk_stat_offsets;
 261 };
 262
 263 #define LPFC_MBOX_TMO           30      /* Sec tmo for outstanding mbox
 264                                            command */
 265 #define LPFC_MBOX_TMO_FLASH_CMD 300     /* Sec tmo for outstanding FLASH write
 266                                          * or erase cmds. This is especially
 267                                          * long because of the potential of
 268                                          * multiple flash erases that can be
 269                                          * spawned.
 270                                          */