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 struct lpfc_cq_event {
  33         struct list_head list;
  34         union {
  35                 struct lpfc_mcqe                mcqe_cmpl;
  36                 struct lpfc_acqe_link           acqe_link;
  37                 struct lpfc_acqe_fip            acqe_fip;
  38                 struct lpfc_acqe_dcbx           acqe_dcbx;
  39                 struct lpfc_acqe_grp5           acqe_grp5;
  40                 struct lpfc_acqe_fc_la          acqe_fc;
  41                 struct lpfc_acqe_sli            acqe_sli;
  42                 struct lpfc_rcqe                rcqe_cmpl;
  43                 struct sli4_wcqe_xri_aborted    wcqe_axri;
  44                 struct lpfc_wcqe_complete       wcqe_cmpl;
  45         } cqe;
  46 };
  47
  48 /* This structure is used to handle IOCB requests / responses */
  49 struct lpfc_iocbq {
  50         /* lpfc_iocbqs are used in double linked lists */
  51         struct list_head list;
  52         struct list_head clist;
  53         struct list_head dlist;
  54         uint16_t iotag;         /* pre-assigned IO tag */
  55         uint16_t sli4_lxritag;  /* logical pre-assigned XRI. */
  56         uint16_t sli4_xritag;   /* pre-assigned XRI, (OXID) tag. */
  57         struct lpfc_cq_event cq_event;
  58
  59         IOCB_t iocb;            /* IOCB cmd */
  60         uint8_t retry;          /* retry counter for IOCB cmd - if needed */
  61         uint16_t iocb_flag;
  62 #define LPFC_IO_LIBDFC          1       /* libdfc iocb */
  63 #define LPFC_IO_WAKE            2       /* High Priority Queue signal flag */
  64 #define LPFC_IO_FCP             4       /* FCP command -- iocbq in scsi_buf */
  65 #define LPFC_DRIVER_ABORTED     8       /* driver aborted this request */
  66 #define LPFC_IO_FABRIC          0x10    /* Iocb send using fabric scheduler */
  67 #define LPFC_DELAY_MEM_FREE     0x20    /* Defer free'ing of FC data */
  68 #define LPFC_EXCHANGE_BUSY      0x40    /* SLI4 hba reported XB in response */
  69 #define LPFC_USE_FCPWQIDX       0x80    /* Submit to specified FCPWQ index */
  70 #define DSS_SECURITY_OP         0x100   /* security IO */
  71 #define LPFC_IO_ON_TXCMPLQ      0x200   /* The IO is still on the TXCMPLQ */
  72 #define LPFC_IO_DIF_PASS        0x400   /* T10 DIF IO pass-thru prot */
  73 #define LPFC_IO_DIF_STRIP       0x800   /* T10 DIF IO strip prot */
  74 #define LPFC_IO_DIF_INSERT      0x1000  /* T10 DIF IO insert prot */
  75
  76 #define LPFC_FIP_ELS_ID_MASK    0xc000  /* ELS_ID range 0-3, non-shifted mask */
  77 #define LPFC_FIP_ELS_ID_SHIFT   14
  78
  79         uint8_t rsvd2;
  80         uint32_t drvrTimeout;   /* driver timeout in seconds */
  81         uint32_t fcp_wqidx;     /* index to FCP work queue */
  82         struct lpfc_vport *vport;/* virtual port pointer */
  83         void *context1;         /* caller context information */
  84         void *context2;         /* caller context information */
  85         void *context3;         /* caller context information */
  86         union {
  87                 wait_queue_head_t    *wait_queue;
  88                 struct lpfc_iocbq    *rsp_iocb;
  89                 struct lpfcMboxq     *mbox;
  90                 struct lpfc_nodelist *ndlp;
  91                 struct lpfc_node_rrq *rrq;
  92         } context_un;
  93
  94         void (*fabric_iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
  95                            struct lpfc_iocbq *);
  96         void (*iocb_cmpl) (struct lpfc_hba *, struct lpfc_iocbq *,
  97                            struct lpfc_iocbq *);
  98 };
  99
 100 #define SLI_IOCB_RET_IOCB      1        /* Return IOCB if cmd ring full */
 101
 102 #define IOCB_SUCCESS        0
 103 #define IOCB_BUSY           1
 104 #define IOCB_ERROR          2
 105 #define IOCB_TIMEDOUT       3
 106
 107 #define LPFC_MBX_WAKE           1
 108 #define LPFC_MBX_IMED_UNREG     2
 109
 110 typedef struct lpfcMboxq {
 111         /* MBOXQs are used in single linked lists */
 112         struct list_head list;  /* ptr to next mailbox command */
 113         union {
 114                 MAILBOX_t mb;           /* Mailbox cmd */
 115                 struct lpfc_mqe mqe;
 116         } u;
 117         struct lpfc_vport *vport;/* virtual port pointer */
 118         void *context1;         /* caller context information */
 119         void *context2;         /* caller context information */
 120
 121         void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
 122         uint8_t mbox_flag;
 123         uint16_t in_ext_byte_len;
 124         uint16_t out_ext_byte_len;
 125         uint8_t  mbox_offset_word;
 126         struct lpfc_mcqe mcqe;
 127         struct lpfc_mbx_nembed_sge_virt *sge_array;
 128 } LPFC_MBOXQ_t;
 129
 130 #define MBX_POLL        1       /* poll mailbox till command done, then
 131                                    return */
 132 #define MBX_NOWAIT      2       /* issue command then return immediately */
 133
 134 #define LPFC_MAX_RING_MASK  5   /* max num of rctl/type masks allowed per
 135                                    ring */
 136 #define LPFC_SLI3_MAX_RING  4   /* Max num of SLI3 rings used by driver.
 137                                    For SLI4, an additional ring for each
 138                                    FCP WQ will be allocated.  */
 139
 140 struct lpfc_sli_ring;
 141
 142 struct lpfc_sli_ring_mask {
 143         uint8_t profile;        /* profile associated with ring */
 144         uint8_t rctl;   /* rctl / type pair configured for ring */
 145         uint8_t type;   /* rctl / type pair configured for ring */
 146         uint8_t rsvd;
 147         /* rcv'd unsol event */
 148         void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
 149                                          struct lpfc_sli_ring *,
 150                                          struct lpfc_iocbq *);
 151 };
 152
 153
 154 /* Structure used to hold SLI statistical counters and info */
 155 struct lpfc_sli_ring_stat {
 156         uint64_t iocb_event;     /* IOCB event counters */
 157         uint64_t iocb_cmd;       /* IOCB cmd issued */
 158         uint64_t iocb_rsp;       /* IOCB rsp received */
 159         uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
 160         uint64_t iocb_cmd_full;  /* IOCB cmd ring full */
 161         uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
 162         uint64_t iocb_rsp_full;  /* IOCB rsp ring full */
 163 };
 164
 165 struct lpfc_sli3_ring {
 166         uint32_t local_getidx;  /* last available cmd index (from cmdGetInx) */
 167         uint32_t next_cmdidx;   /* next_cmd index */
 168         uint32_t rspidx;        /* current index in response ring */
 169         uint32_t cmdidx;        /* current index in command ring */
 170         uint16_t numCiocb;      /* number of command iocb's per ring */
 171         uint16_t numRiocb;      /* number of rsp iocb's per ring */
 172         uint16_t sizeCiocb;     /* Size of command iocb's in this ring */
 173         uint16_t sizeRiocb;     /* Size of response iocb's in this ring */
 174         uint32_t *cmdringaddr;  /* virtual address for cmd rings */
 175         uint32_t *rspringaddr;  /* virtual address for rsp rings */
 176 };
 177
 178 struct lpfc_sli4_ring {
 179         struct lpfc_queue *wqp; /* Pointer to associated WQ */
 180 };
 181
 182
 183 /* Structure used to hold SLI ring information */
 184 struct lpfc_sli_ring {
 185         uint16_t flag;          /* ring flags */
 186 #define LPFC_DEFERRED_RING_EVENT 0x001  /* Deferred processing a ring event */
 187 #define LPFC_CALL_RING_AVAILABLE 0x002  /* indicates cmd was full */
 188 #define LPFC_STOP_IOCB_EVENT     0x020  /* Stop processing IOCB cmds event */
 189         uint16_t abtsiotag;     /* tracks next iotag to use for ABTS */
 190
 191         uint8_t rsvd;
 192         uint8_t ringno;         /* ring number */
 193
 194         spinlock_t ring_lock;   /* lock for issuing commands */
 195
 196         uint32_t fast_iotag;    /* max fastlookup based iotag           */
 197         uint32_t iotag_ctr;     /* keeps track of the next iotag to use */
 198         uint32_t iotag_max;     /* max iotag value to use               */
 199         struct list_head txq;
 200         uint16_t txq_cnt;       /* current length of queue */
 201         uint16_t txq_max;       /* max length */
 202         struct list_head txcmplq;
 203         uint16_t txcmplq_cnt;   /* current length of queue */
 204         uint16_t txcmplq_max;   /* max length */
 205         uint32_t missbufcnt;    /* keep track of buffers to post */
 206         struct list_head postbufq;
 207         uint16_t postbufq_cnt;  /* current length of queue */
 208         uint16_t postbufq_max;  /* max length */
 209         struct list_head iocb_continueq;
 210         uint16_t iocb_continueq_cnt;    /* current length of queue */
 211         uint16_t iocb_continueq_max;    /* max length */
 212         struct list_head iocb_continue_saveq;
 213
 214         struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
 215         uint32_t num_mask;      /* number of mask entries in prt array */
 216         void (*lpfc_sli_rcv_async_status) (struct lpfc_hba *,
 217                 struct lpfc_sli_ring *, struct lpfc_iocbq *);
 218
 219         struct lpfc_sli_ring_stat stats;        /* SLI statistical info */
 220
 221         /* cmd ring available */
 222         void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
 223                                         struct lpfc_sli_ring *);
 224         union {
 225                 struct lpfc_sli3_ring sli3;
 226                 struct lpfc_sli4_ring sli4;
 227         } sli;
 228 };
 229
 230 /* Structure used for configuring rings to a specific profile or rctl / type */
 231 struct lpfc_hbq_init {
 232         uint32_t rn;            /* Receive buffer notification */
 233         uint32_t entry_count;   /* max # of entries in HBQ */
 234         uint32_t headerLen;     /* 0 if not profile 4 or 5 */
 235         uint32_t logEntry;      /* Set to 1 if this HBQ used for LogEntry */
 236         uint32_t profile;       /* Selection profile 0=all, 7=logentry */
 237         uint32_t ring_mask;     /* Binds HBQ to a ring e.g. Ring0=b0001,
 238                                  * ring2=b0100 */
 239         uint32_t hbq_index;     /* index of this hbq in ring .HBQs[] */
 240
 241         uint32_t seqlenoff;
 242         uint32_t maxlen;
 243         uint32_t seqlenbcnt;
 244         uint32_t cmdcodeoff;
 245         uint32_t cmdmatch[8];
 246         uint32_t mask_count;    /* number of mask entries in prt array */
 247         struct hbq_mask hbqMasks[6];
 248
 249         /* Non-config rings fields to keep track of buffer allocations */
 250         uint32_t buffer_count;  /* number of buffers allocated */
 251         uint32_t init_count;    /* number to allocate when initialized */
 252         uint32_t add_count;     /* number to allocate when starved */
 253 } ;
 254
 255 /* Structure used to hold SLI statistical counters and info */
 256 struct lpfc_sli_stat {
 257         uint64_t mbox_stat_err;  /* Mbox cmds completed status error */
 258         uint64_t mbox_cmd;       /* Mailbox commands issued */
 259         uint64_t sli_intr;       /* Count of Host Attention interrupts */
 260         uint64_t sli_prev_intr;  /* Previous cnt of Host Attention interrupts */
 261         uint64_t sli_ips;        /* Host Attention interrupts per sec */
 262         uint32_t err_attn_event; /* Error Attn event counters */
 263         uint32_t link_event;     /* Link event counters */
 264         uint32_t mbox_event;     /* Mailbox event counters */
 265         uint32_t mbox_busy;      /* Mailbox cmd busy */
 266 };
 267
 268 /* Structure to store link status values when port stats are reset */
 269 struct lpfc_lnk_stat {
 270         uint32_t link_failure_count;
 271         uint32_t loss_of_sync_count;
 272         uint32_t loss_of_signal_count;
 273         uint32_t prim_seq_protocol_err_count;
 274         uint32_t invalid_tx_word_count;
 275         uint32_t invalid_crc_count;
 276         uint32_t error_frames;
 277         uint32_t link_events;
 278 };
 279
 280 /* Structure used to hold SLI information */
 281 struct lpfc_sli {
 282         uint32_t num_rings;
 283         uint32_t sli_flag;
 284
 285         /* Additional sli_flags */
 286 #define LPFC_SLI_MBOX_ACTIVE      0x100 /* HBA mailbox is currently active */
 287 #define LPFC_SLI_ACTIVE           0x200 /* SLI in firmware is active */
 288 #define LPFC_PROCESS_LA           0x400 /* Able to process link attention */
 289 #define LPFC_BLOCK_MGMT_IO        0x800 /* Don't allow mgmt mbx or iocb cmds */
 290 #define LPFC_MENLO_MAINT          0x1000 /* need for menl fw download */
 291 #define LPFC_SLI_ASYNC_MBX_BLK    0x2000 /* Async mailbox is blocked */
 292
 293         struct lpfc_sli_ring *ring;
 294         int fcp_ring;           /* ring used for FCP initiator commands */
 295         int next_ring;
 296
 297         int extra_ring;         /* extra ring used for other protocols */
 298
 299         struct lpfc_sli_stat slistat;   /* SLI statistical info */
 300         struct list_head mboxq;
 301         uint16_t mboxq_cnt;     /* current length of queue */
 302         uint16_t mboxq_max;     /* max length */
 303         LPFC_MBOXQ_t *mbox_active;      /* active mboxq information */
 304         struct list_head mboxq_cmpl;
 305
 306         struct timer_list mbox_tmo;     /* Hold clk to timeout active mbox
 307                                            cmd */
 308
 309 #define LPFC_IOCBQ_LOOKUP_INCREMENT  1024
 310         struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
 311         size_t iocbq_lookup_len;           /* current lengs of the array */
 312         uint16_t  last_iotag;              /* last allocated IOTAG */
 313         unsigned long  stats_start;        /* in seconds */
 314         struct lpfc_lnk_stat lnk_stat_offsets;
 315 };
 316
 317 /* Timeout for normal outstanding mbox command (Seconds) */
 318 #define LPFC_MBOX_TMO                           30
 319 /* Timeout for non-flash-based outstanding sli_config mbox command (Seconds) */
 320 #define LPFC_MBOX_SLI4_CONFIG_TMO               60
 321 /* Timeout for flash-based outstanding sli_config mbox command (Seconds) */
 322 #define LPFC_MBOX_SLI4_CONFIG_EXTENDED_TMO      300
 323 /* Timeout for other flash-based outstanding mbox command (Seconds) */
 324 #define LPFC_MBOX_TMO_FLASH_CMD                 300