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 carry the needed response IOCB states */
  33 struct lpfc_sli4_rspiocb_info {
  34         uint8_t hw_status;
  35         uint8_t bfield;
  36 #define LPFC_XB 0x1
  37 #define LPFC_PV 0x2
  38         uint8_t priority;
  39         uint8_t reserved;
  40 };
  41
  42 /* This structure is used to handle IOCB requests / responses */
  43 struct lpfc_iocbq {
  44         /* lpfc_iocbqs are used in double linked lists */
  45         struct list_head list;
  46         struct list_head clist;
  47         uint16_t iotag;         /* pre-assigned IO tag */
  48         uint16_t sli4_xritag;   /* pre-assigned XRI, (OXID) tag. */
  49
  50         IOCB_t iocb;            /* IOCB cmd */
  51         uint8_t retry;          /* retry counter for IOCB cmd - if needed */
  52         uint8_t iocb_flag;
  53 #define LPFC_IO_LIBDFC          1       /* libdfc iocb */
  54 #define LPFC_IO_WAKE            2       /* High Priority Queue signal flag */
  55 #define LPFC_IO_FCP             4       /* FCP command -- iocbq in scsi_buf */
  56 #define LPFC_DRIVER_ABORTED     8       /* driver aborted this request */
  57 #define LPFC_IO_FABRIC          0x10    /* Iocb send using fabric scheduler */
  58 #define LPFC_DELAY_MEM_FREE     0x20    /* Defer free'ing of FC data */
  59 #define LPFC_FIP_ELS            0x40
  60
  61         uint8_t abort_count;
  62         uint8_t rsvd2;
  63         uint32_t drvrTimeout;   /* driver timeout in seconds */
  64         struct lpfc_vport *vport;/* virtual port pointer */
  65         void *context1;         /* caller context information */
  66         void *context2;         /* caller context information */
  67         void *context3;         /* caller context information */
  68         union {
  69                 wait_queue_head_t    *wait_queue;
  70                 struct lpfc_iocbq    *rsp_iocb;
  71                 struct lpfcMboxq     *mbox;
  72                 struct lpfc_nodelist *ndlp;
  73         } context_un;
  74
  75         void (*fabric_iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
  76                            struct lpfc_iocbq *);
  77         void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
  78                            struct lpfc_iocbq *);
  79         struct lpfc_sli4_rspiocb_info sli4_info;
  80 };
  81
  82 #define SLI_IOCB_RET_IOCB      1        /* Return IOCB if cmd ring full */
  83
  84 #define IOCB_SUCCESS        0
  85 #define IOCB_BUSY           1
  86 #define IOCB_ERROR          2
  87 #define IOCB_TIMEDOUT       3
  88
  89 #define LPFC_MBX_WAKE           1
  90 #define LPFC_MBX_IMED_UNREG     2
  91
  92 typedef struct lpfcMboxq {
  93         /* MBOXQs are used in single linked lists */
  94         struct list_head list;  /* ptr to next mailbox command */
  95         union {
  96                 MAILBOX_t mb;           /* Mailbox cmd */
  97                 struct lpfc_mqe mqe;
  98         } u;
  99         struct lpfc_vport *vport;/* virtual port pointer */
 100         void *context1;         /* caller context information */
 101         void *context2;         /* caller context information */
 102
 103         void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
 104         uint8_t mbox_flag;
 105         struct lpfc_mcqe mcqe;
 106         struct lpfc_mbx_nembed_sge_virt *sge_array;
 107 } LPFC_MBOXQ_t;
 108
 109 #define MBX_POLL        1       /* poll mailbox till command done, then
 110                                    return */
 111 #define MBX_NOWAIT      2       /* issue command then return immediately */
 112
 113 #define LPFC_MAX_RING_MASK  4   /* max num of rctl/type masks allowed per
 114                                    ring */
 115 #define LPFC_MAX_RING       4   /* max num of SLI rings used by driver */
 116
 117 struct lpfc_sli_ring;
 118
 119 struct lpfc_sli_ring_mask {
 120         uint8_t profile;        /* profile associated with ring */
 121         uint8_t rctl;   /* rctl / type pair configured for ring */
 122         uint8_t type;   /* rctl / type pair configured for ring */
 123         uint8_t rsvd;
 124         /* rcv'd unsol event */
 125         void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
 126                                          struct lpfc_sli_ring *,
 127                                          struct lpfc_iocbq *);
 128 };
 129
 130
 131 /* Structure used to hold SLI statistical counters and info */
 132 struct lpfc_sli_ring_stat {
 133         uint64_t iocb_event;     /* IOCB event counters */
 134         uint64_t iocb_cmd;       /* IOCB cmd issued */
 135         uint64_t iocb_rsp;       /* IOCB rsp received */
 136         uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
 137         uint64_t iocb_cmd_full;  /* IOCB cmd ring full */
 138         uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
 139         uint64_t iocb_rsp_full;  /* IOCB rsp ring full */
 140 };
 141
 142 /* Structure used to hold SLI ring information */
 143 struct lpfc_sli_ring {
 144         uint16_t flag;          /* ring flags */
 145 #define LPFC_DEFERRED_RING_EVENT 0x001  /* Deferred processing a ring event */
 146 #define LPFC_CALL_RING_AVAILABLE 0x002  /* indicates cmd was full */
 147 #define LPFC_STOP_IOCB_EVENT     0x020  /* Stop processing IOCB cmds event */
 148         uint16_t abtsiotag;     /* tracks next iotag to use for ABTS */
 149
 150         uint32_t local_getidx;   /* last available cmd index (from cmdGetInx) */
 151         uint32_t next_cmdidx;    /* next_cmd index */
 152         uint32_t rspidx;        /* current index in response ring */
 153         uint32_t cmdidx;        /* current index in command ring */
 154         uint8_t rsvd;
 155         uint8_t ringno;         /* ring number */
 156         uint16_t numCiocb;      /* number of command iocb's per ring */
 157         uint16_t numRiocb;      /* number of rsp iocb's per ring */
 158         uint16_t sizeCiocb;     /* Size of command iocb's in this ring */
 159         uint16_t sizeRiocb;     /* Size of response iocb's in this ring */
 160
 161         uint32_t fast_iotag;    /* max fastlookup based iotag           */
 162         uint32_t iotag_ctr;     /* keeps track of the next iotag to use */
 163         uint32_t iotag_max;     /* max iotag value to use               */
 164         struct list_head txq;
 165         uint16_t txq_cnt;       /* current length of queue */
 166         uint16_t txq_max;       /* max length */
 167         struct list_head txcmplq;
 168         uint16_t txcmplq_cnt;   /* current length of queue */
 169         uint16_t txcmplq_max;   /* max length */
 170         uint32_t *cmdringaddr;  /* virtual address for cmd rings */
 171         uint32_t *rspringaddr;  /* virtual address for rsp rings */
 172         uint32_t missbufcnt;    /* keep track of buffers to post */
 173         struct list_head postbufq;
 174         uint16_t postbufq_cnt;  /* current length of queue */
 175         uint16_t postbufq_max;  /* max length */
 176         struct list_head iocb_continueq;
 177         uint16_t iocb_continueq_cnt;    /* current length of queue */
 178         uint16_t iocb_continueq_max;    /* max length */
 179         struct list_head iocb_continue_saveq;
 180
 181         struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
 182         uint32_t num_mask;      /* number of mask entries in prt array */
 183         void (*lpfc_sli_rcv_async_status) (struct lpfc_hba *,
 184                 struct lpfc_sli_ring *, struct lpfc_iocbq *);
 185
 186         struct lpfc_sli_ring_stat stats;        /* SLI statistical info */
 187
 188         /* cmd ring available */
 189         void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
 190                                         struct lpfc_sli_ring *);
 191 };
 192
 193 /* Structure used for configuring rings to a specific profile or rctl / type */
 194 struct lpfc_hbq_init {
 195         uint32_t rn;            /* Receive buffer notification */
 196         uint32_t entry_count;   /* max # of entries in HBQ */
 197         uint32_t headerLen;     /* 0 if not profile 4 or 5 */
 198         uint32_t logEntry;      /* Set to 1 if this HBQ used for LogEntry */
 199         uint32_t profile;       /* Selection profile 0=all, 7=logentry */
 200         uint32_t ring_mask;     /* Binds HBQ to a ring e.g. Ring0=b0001,
 201                                  * ring2=b0100 */
 202         uint32_t hbq_index;     /* index of this hbq in ring .HBQs[] */
 203
 204         uint32_t seqlenoff;
 205         uint32_t maxlen;
 206         uint32_t seqlenbcnt;
 207         uint32_t cmdcodeoff;
 208         uint32_t cmdmatch[8];
 209         uint32_t mask_count;    /* number of mask entries in prt array */
 210         struct hbq_mask hbqMasks[6];
 211
 212         /* Non-config rings fields to keep track of buffer allocations */
 213         uint32_t buffer_count;  /* number of buffers allocated */
 214         uint32_t init_count;    /* number to allocate when initialized */
 215         uint32_t add_count;     /* number to allocate when starved */
 216 } ;
 217
 218 /* Structure used to hold SLI statistical counters and info */
 219 struct lpfc_sli_stat {
 220         uint64_t mbox_stat_err;  /* Mbox cmds completed status error */
 221         uint64_t mbox_cmd;       /* Mailbox commands issued */
 222         uint64_t sli_intr;       /* Count of Host Attention interrupts */
 223         uint32_t err_attn_event; /* Error Attn event counters */
 224         uint32_t link_event;     /* Link event counters */
 225         uint32_t mbox_event;     /* Mailbox event counters */
 226         uint32_t mbox_busy;      /* Mailbox cmd busy */
 227 };
 228
 229 /* Structure to store link status values when port stats are reset */
 230 struct lpfc_lnk_stat {
 231         uint32_t link_failure_count;
 232         uint32_t loss_of_sync_count;
 233         uint32_t loss_of_signal_count;
 234         uint32_t prim_seq_protocol_err_count;
 235         uint32_t invalid_tx_word_count;
 236         uint32_t invalid_crc_count;
 237         uint32_t error_frames;
 238         uint32_t link_events;
 239 };
 240
 241 /* Structure used to hold SLI information */
 242 struct lpfc_sli {
 243         uint32_t num_rings;
 244         uint32_t sli_flag;
 245
 246         /* Additional sli_flags */
 247 #define LPFC_SLI_MBOX_ACTIVE      0x100 /* HBA mailbox is currently active */
 248 #define LPFC_SLI_ACTIVE           0x200 /* SLI in firmware is active */
 249 #define LPFC_PROCESS_LA           0x400 /* Able to process link attention */
 250 #define LPFC_BLOCK_MGMT_IO        0x800 /* Don't allow mgmt mbx or iocb cmds */
 251 #define LPFC_MENLO_MAINT          0x1000 /* need for menl fw download */
 252 #define LPFC_SLI_ASYNC_MBX_BLK    0x2000 /* Async mailbox is blocked */
 253
 254         struct lpfc_sli_ring ring[LPFC_MAX_RING];
 255         int fcp_ring;           /* ring used for FCP initiator commands */
 256         int next_ring;
 257
 258         int extra_ring;         /* extra ring used for other protocols */
 259
 260         struct lpfc_sli_stat slistat;   /* SLI statistical info */
 261         struct list_head mboxq;
 262         uint16_t mboxq_cnt;     /* current length of queue */
 263         uint16_t mboxq_max;     /* max length */
 264         LPFC_MBOXQ_t *mbox_active;      /* active mboxq information */
 265         struct list_head mboxq_cmpl;
 266
 267         struct timer_list mbox_tmo;     /* Hold clk to timeout active mbox
 268                                            cmd */
 269
 270 #define LPFC_IOCBQ_LOOKUP_INCREMENT  1024
 271         struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
 272         size_t iocbq_lookup_len;           /* current lengs of the array */
 273         uint16_t  last_iotag;              /* last allocated IOTAG */
 274         unsigned long  stats_start;        /* in seconds */
 275         struct lpfc_lnk_stat lnk_stat_offsets;
 276 };
 277
 278 #define LPFC_MBOX_TMO           30      /* Sec tmo for outstanding mbox
 279                                            command */
 280 #define LPFC_MBOX_SLI4_CONFIG_TMO 60    /* Sec tmo for outstanding mbox
 281                                            command */
 282 #define LPFC_MBOX_TMO_FLASH_CMD 300     /* Sec tmo for outstanding FLASH write
 283                                          * or erase cmds. This is especially
 284                                          * long because of the potential of
 285                                          * multiple flash erases that can be
 286                                          * spawned.
 287                                          */