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) 2004-2016 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         uint16_t hba_wqidx;     /* index to HBA work queue */
  58         struct lpfc_cq_event cq_event;
  59         struct lpfc_wcqe_complete wcqe_cmpl;    /* WQE cmpl */
  60         uint64_t isr_timestamp;
  61
  62         /* Be careful here */
  63         union lpfc_wqe wqe;     /* WQE cmd */
  64         IOCB_t iocb;            /* For IOCB cmd or if we want 128 byte WQE */
  65
  66         uint8_t rsvd2;
  67         uint8_t priority;       /* OAS priority */
  68         uint8_t retry;          /* retry counter for IOCB cmd - if needed */
  69         uint32_t iocb_flag;
  70 #define LPFC_IO_LIBDFC          1       /* libdfc iocb */
  71 #define LPFC_IO_WAKE            2       /* Synchronous I/O completed */
  72 #define LPFC_IO_WAKE_TMO        LPFC_IO_WAKE /* Synchronous I/O timed out */
  73 #define LPFC_IO_FCP             4       /* FCP command -- iocbq in scsi_buf */
  74 #define LPFC_DRIVER_ABORTED     8       /* driver aborted this request */
  75 #define LPFC_IO_FABRIC          0x10    /* Iocb send using fabric scheduler */
  76 #define LPFC_DELAY_MEM_FREE     0x20    /* Defer free'ing of FC data */
  77 #define LPFC_EXCHANGE_BUSY      0x40    /* SLI4 hba reported XB in response */
  78 #define LPFC_USE_FCPWQIDX       0x80    /* Submit to specified FCPWQ index */
  79 #define DSS_SECURITY_OP         0x100   /* security IO */
  80 #define LPFC_IO_ON_TXCMPLQ      0x200   /* The IO is still on the TXCMPLQ */
  81 #define LPFC_IO_DIF_PASS        0x400   /* T10 DIF IO pass-thru prot */
  82 #define LPFC_IO_DIF_STRIP       0x800   /* T10 DIF IO strip prot */
  83 #define LPFC_IO_DIF_INSERT      0x1000  /* T10 DIF IO insert prot */
  84 #define LPFC_IO_CMD_OUTSTANDING 0x2000 /* timeout handler abort window */
  85
  86 #define LPFC_FIP_ELS_ID_MASK    0xc000  /* ELS_ID range 0-3, non-shifted mask */
  87 #define LPFC_FIP_ELS_ID_SHIFT   14
  88
  89 #define LPFC_IO_OAS             0x10000 /* OAS FCP IO */
  90 #define LPFC_IO_FOF             0x20000 /* FOF FCP IO */
  91 #define LPFC_IO_LOOPBACK        0x40000 /* Loopback IO */
  92 #define LPFC_PRLI_NVME_REQ      0x80000 /* This is an NVME PRLI. */
  93 #define LPFC_PRLI_FCP_REQ       0x100000 /* This is an NVME PRLI. */
  94 #define LPFC_IO_NVME            0x200000 /* NVME FCP command */
  95 #define LPFC_IO_NVME_LS         0x400000 /* NVME LS command */
  96 #define LPFC_IO_NVMET           0x800000 /* NVMET command */
  97
  98         uint32_t drvrTimeout;   /* driver timeout in seconds */
  99         struct lpfc_vport *vport;/* virtual port pointer */
 100         void *context1;         /* caller context information */
 101         void *context2;         /* caller context information */
 102         void *context3;         /* caller context information */
 103         union {
 104                 wait_queue_head_t    *wait_queue;
 105                 struct lpfc_iocbq    *rsp_iocb;
 106                 struct lpfcMboxq     *mbox;
 107                 struct lpfc_nodelist *ndlp;
 108                 struct lpfc_node_rrq *rrq;
 109         } context_un;
 110
 111         void (*fabric_iocb_cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 112                            struct lpfc_iocbq *);
 113         void (*wait_iocb_cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 114                            struct lpfc_iocbq *);
 115         void (*iocb_cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 116                            struct lpfc_iocbq *);
 117         void (*wqe_cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 118                           struct lpfc_wcqe_complete *);
 119 };
 120
 121 #define SLI_IOCB_RET_IOCB      1        /* Return IOCB if cmd ring full */
 122
 123 #define IOCB_SUCCESS        0
 124 #define IOCB_BUSY           1
 125 #define IOCB_ERROR          2
 126 #define IOCB_TIMEDOUT       3
 127
 128 #define SLI_WQE_RET_WQE    1    /* Return WQE if cmd ring full */
 129
 130 #define WQE_SUCCESS        0
 131 #define WQE_BUSY           1
 132 #define WQE_ERROR          2
 133 #define WQE_TIMEDOUT       3
 134 #define WQE_ABORTED        4
 135
 136 #define LPFC_MBX_WAKE           1
 137 #define LPFC_MBX_IMED_UNREG     2
 138
 139 typedef struct lpfcMboxq {
 140         /* MBOXQs are used in single linked lists */
 141         struct list_head list;  /* ptr to next mailbox command */
 142         union {
 143                 MAILBOX_t mb;           /* Mailbox cmd */
 144                 struct lpfc_mqe mqe;
 145         } u;
 146         struct lpfc_vport *vport;/* virtual port pointer */
 147         void *context1;         /* caller context information */
 148         void *context2;         /* caller context information */
 149
 150         void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
 151         uint8_t mbox_flag;
 152         uint16_t in_ext_byte_len;
 153         uint16_t out_ext_byte_len;
 154         uint8_t  mbox_offset_word;
 155         struct lpfc_mcqe mcqe;
 156         struct lpfc_mbx_nembed_sge_virt *sge_array;
 157 } LPFC_MBOXQ_t;
 158
 159 #define MBX_POLL        1       /* poll mailbox till command done, then
 160                                    return */
 161 #define MBX_NOWAIT      2       /* issue command then return immediately */
 162
 163 #define LPFC_MAX_RING_MASK  5   /* max num of rctl/type masks allowed per
 164                                    ring */
 165 #define LPFC_SLI3_MAX_RING  4   /* Max num of SLI3 rings used by driver.
 166                                    For SLI4, an additional ring for each
 167                                    FCP WQ will be allocated.  */
 168
 169 struct lpfc_sli_ring;
 170
 171 struct lpfc_sli_ring_mask {
 172         uint8_t profile;        /* profile associated with ring */
 173         uint8_t rctl;   /* rctl / type pair configured for ring */
 174         uint8_t type;   /* rctl / type pair configured for ring */
 175         uint8_t rsvd;
 176         /* rcv'd unsol event */
 177         void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
 178                                          struct lpfc_sli_ring *,
 179                                          struct lpfc_iocbq *);
 180 };
 181
 182
 183 /* Structure used to hold SLI statistical counters and info */
 184 struct lpfc_sli_ring_stat {
 185         uint64_t iocb_event;     /* IOCB event counters */
 186         uint64_t iocb_cmd;       /* IOCB cmd issued */
 187         uint64_t iocb_rsp;       /* IOCB rsp received */
 188         uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
 189         uint64_t iocb_cmd_full;  /* IOCB cmd ring full */
 190         uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
 191         uint64_t iocb_rsp_full;  /* IOCB rsp ring full */
 192 };
 193
 194 struct lpfc_sli3_ring {
 195         uint32_t local_getidx;  /* last available cmd index (from cmdGetInx) */
 196         uint32_t next_cmdidx;   /* next_cmd index */
 197         uint32_t rspidx;        /* current index in response ring */
 198         uint32_t cmdidx;        /* current index in command ring */
 199         uint16_t numCiocb;      /* number of command iocb's per ring */
 200         uint16_t numRiocb;      /* number of rsp iocb's per ring */
 201         uint16_t sizeCiocb;     /* Size of command iocb's in this ring */
 202         uint16_t sizeRiocb;     /* Size of response iocb's in this ring */
 203         uint32_t *cmdringaddr;  /* virtual address for cmd rings */
 204         uint32_t *rspringaddr;  /* virtual address for rsp rings */
 205 };
 206
 207 struct lpfc_sli4_ring {
 208         struct lpfc_queue *wqp; /* Pointer to associated WQ */
 209 };
 210
 211
 212 /* Structure used to hold SLI ring information */
 213 struct lpfc_sli_ring {
 214         uint16_t flag;          /* ring flags */
 215 #define LPFC_DEFERRED_RING_EVENT 0x001  /* Deferred processing a ring event */
 216 #define LPFC_CALL_RING_AVAILABLE 0x002  /* indicates cmd was full */
 217 #define LPFC_STOP_IOCB_EVENT     0x020  /* Stop processing IOCB cmds event */
 218         uint16_t abtsiotag;     /* tracks next iotag to use for ABTS */
 219
 220         uint8_t rsvd;
 221         uint8_t ringno;         /* ring number */
 222
 223         spinlock_t ring_lock;   /* lock for issuing commands */
 224
 225         uint32_t fast_iotag;    /* max fastlookup based iotag           */
 226         uint32_t iotag_ctr;     /* keeps track of the next iotag to use */
 227         uint32_t iotag_max;     /* max iotag value to use               */
 228         struct list_head txq;
 229         uint16_t txq_cnt;       /* current length of queue */
 230         uint16_t txq_max;       /* max length */
 231         struct list_head txcmplq;
 232         uint16_t txcmplq_cnt;   /* current length of queue */
 233         uint16_t txcmplq_max;   /* max length */
 234         uint32_t missbufcnt;    /* keep track of buffers to post */
 235         struct list_head postbufq;
 236         uint16_t postbufq_cnt;  /* current length of queue */
 237         uint16_t postbufq_max;  /* max length */
 238         struct list_head iocb_continueq;
 239         uint16_t iocb_continueq_cnt;    /* current length of queue */
 240         uint16_t iocb_continueq_max;    /* max length */
 241         struct list_head iocb_continue_saveq;
 242
 243         struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
 244         uint32_t num_mask;      /* number of mask entries in prt array */
 245         void (*lpfc_sli_rcv_async_status) (struct lpfc_hba *,
 246                 struct lpfc_sli_ring *, struct lpfc_iocbq *);
 247
 248         struct lpfc_sli_ring_stat stats;        /* SLI statistical info */
 249
 250         /* cmd ring available */
 251         void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
 252                                         struct lpfc_sli_ring *);
 253         union {
 254                 struct lpfc_sli3_ring sli3;
 255                 struct lpfc_sli4_ring sli4;
 256         } sli;
 257 };
 258
 259 /* Structure used for configuring rings to a specific profile or rctl / type */
 260 struct lpfc_hbq_init {
 261         uint32_t rn;            /* Receive buffer notification */
 262         uint32_t entry_count;   /* max # of entries in HBQ */
 263         uint32_t headerLen;     /* 0 if not profile 4 or 5 */
 264         uint32_t logEntry;      /* Set to 1 if this HBQ used for LogEntry */
 265         uint32_t profile;       /* Selection profile 0=all, 7=logentry */
 266         uint32_t ring_mask;     /* Binds HBQ to a ring e.g. Ring0=b0001,
 267                                  * ring2=b0100 */
 268         uint32_t hbq_index;     /* index of this hbq in ring .HBQs[] */
 269
 270         uint32_t seqlenoff;
 271         uint32_t maxlen;
 272         uint32_t seqlenbcnt;
 273         uint32_t cmdcodeoff;
 274         uint32_t cmdmatch[8];
 275         uint32_t mask_count;    /* number of mask entries in prt array */
 276         struct hbq_mask hbqMasks[6];
 277
 278         /* Non-config rings fields to keep track of buffer allocations */
 279         uint32_t buffer_count;  /* number of buffers allocated */
 280         uint32_t init_count;    /* number to allocate when initialized */
 281         uint32_t add_count;     /* number to allocate when starved */
 282 } ;
 283
 284 /* Structure used to hold SLI statistical counters and info */
 285 struct lpfc_sli_stat {
 286         uint64_t mbox_stat_err;  /* Mbox cmds completed status error */
 287         uint64_t mbox_cmd;       /* Mailbox commands issued */
 288         uint64_t sli_intr;       /* Count of Host Attention interrupts */
 289         uint64_t sli_prev_intr;  /* Previous cnt of Host Attention interrupts */
 290         uint64_t sli_ips;        /* Host Attention interrupts per sec */
 291         uint32_t err_attn_event; /* Error Attn event counters */
 292         uint32_t link_event;     /* Link event counters */
 293         uint32_t mbox_event;     /* Mailbox event counters */
 294         uint32_t mbox_busy;      /* Mailbox cmd busy */
 295 };
 296
 297 /* Structure to store link status values when port stats are reset */
 298 struct lpfc_lnk_stat {
 299         uint32_t link_failure_count;
 300         uint32_t loss_of_sync_count;
 301         uint32_t loss_of_signal_count;
 302         uint32_t prim_seq_protocol_err_count;
 303         uint32_t invalid_tx_word_count;
 304         uint32_t invalid_crc_count;
 305         uint32_t error_frames;
 306         uint32_t link_events;
 307 };
 308
 309 /* Structure used to hold SLI information */
 310 struct lpfc_sli {
 311         uint32_t num_rings;
 312         uint32_t sli_flag;
 313
 314         /* Additional sli_flags */
 315 #define LPFC_SLI_MBOX_ACTIVE      0x100 /* HBA mailbox is currently active */
 316 #define LPFC_SLI_ACTIVE           0x200 /* SLI in firmware is active */
 317 #define LPFC_PROCESS_LA           0x400 /* Able to process link attention */
 318 #define LPFC_BLOCK_MGMT_IO        0x800 /* Don't allow mgmt mbx or iocb cmds */
 319 #define LPFC_MENLO_MAINT          0x1000 /* need for menl fw download */
 320 #define LPFC_SLI_ASYNC_MBX_BLK    0x2000 /* Async mailbox is blocked */
 321 #define LPFC_SLI_SUPPRESS_RSP     0x4000 /* Suppress RSP feature is supported */
 322
 323         struct lpfc_sli_ring *sli3_ring;
 324
 325         struct lpfc_sli_stat slistat;   /* SLI statistical info */
 326         struct list_head mboxq;
 327         uint16_t mboxq_cnt;     /* current length of queue */
 328         uint16_t mboxq_max;     /* max length */
 329         LPFC_MBOXQ_t *mbox_active;      /* active mboxq information */
 330         struct list_head mboxq_cmpl;
 331
 332         struct timer_list mbox_tmo;     /* Hold clk to timeout active mbox
 333                                            cmd */
 334
 335 #define LPFC_IOCBQ_LOOKUP_INCREMENT  1024
 336         struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
 337         size_t iocbq_lookup_len;           /* current lengs of the array */
 338         uint16_t  last_iotag;              /* last allocated IOTAG */
 339         unsigned long  stats_start;        /* in seconds */
 340         struct lpfc_lnk_stat lnk_stat_offsets;
 341 };
 342
 343 /* Timeout for normal outstanding mbox command (Seconds) */
 344 #define LPFC_MBOX_TMO                           30
 345 /* Timeout for non-flash-based outstanding sli_config mbox command (Seconds) */
 346 #define LPFC_MBOX_SLI4_CONFIG_TMO               60
 347 /* Timeout for flash-based outstanding sli_config mbox command (Seconds) */
 348 #define LPFC_MBOX_SLI4_CONFIG_EXTENDED_TMO      300
 349 /* Timeout for other flash-based outstanding mbox command (Seconds) */
 350 #define LPFC_MBOX_TMO_FLASH_CMD                 300