LXR linux/drivers/scsi/lpfc/lpfc

   1/*******************************************************************
   2 * This file is part of the Emulex Linux Device Driver for         *
   3 * Fibre Channel Host Bus Adapters.                                *
   4 * Copyright (C) 2017-2019 Broadcom. All Rights Reserved. The term *
   5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
   6 * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
   7 * EMULEX and SLI are trademarks of Emulex.                        *
   8 * www.broadcom.com                                                *
   9 *                                                                 *
  10 * This program is free software; you can redistribute it and/or   *
  11 * modify it under the terms of version 2 of the GNU General       *
  12 * Public License as published by the Free Software Foundation.    *
  13 * This program is distributed in the hope that it will be useful. *
  14 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  15 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  16 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  17 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  18 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  19 * more details, a copy of which can be found in the file COPYING  *
  20 * included with this package.                                     *
  21 *******************************************************************/
  22
  23#if defined(CONFIG_DEBUG_FS) && !defined(CONFIG_SCSI_LPFC_DEBUG_FS)
  24#define CONFIG_SCSI_LPFC_DEBUG_FS
  25#endif
  26
  27/* forward declaration for LPFC_IOCB_t's use */
  28struct lpfc_hba;
  29struct lpfc_vport;
  30
  31/* Define the context types that SLI handles for abort and sums. */
  32typedef enum _lpfc_ctx_cmd {
  33        LPFC_CTX_LUN,
  34        LPFC_CTX_TGT,
  35        LPFC_CTX_HOST
  36} lpfc_ctx_cmd;
  37
  38struct lpfc_cq_event {
  39        struct list_head list;
  40        uint16_t hdwq;
  41        union {
  42                struct lpfc_mcqe                mcqe_cmpl;
  43                struct lpfc_acqe_link           acqe_link;
  44                struct lpfc_acqe_fip            acqe_fip;
  45                struct lpfc_acqe_dcbx           acqe_dcbx;
  46                struct lpfc_acqe_grp5           acqe_grp5;
  47                struct lpfc_acqe_fc_la          acqe_fc;
  48                struct lpfc_acqe_sli            acqe_sli;
  49                struct lpfc_rcqe                rcqe_cmpl;
  50                struct sli4_wcqe_xri_aborted    wcqe_axri;
  51                struct lpfc_wcqe_complete       wcqe_cmpl;
  52        } cqe;
  53};
  54
  55/* This structure is used to handle IOCB requests / responses */
  56struct lpfc_iocbq {
  57        /* lpfc_iocbqs are used in double linked lists */
  58        struct list_head list;
  59        struct list_head clist;
  60        struct list_head dlist;
  61        uint16_t iotag;         /* pre-assigned IO tag */
  62        uint16_t sli4_lxritag;  /* logical pre-assigned XRI. */
  63        uint16_t sli4_xritag;   /* pre-assigned XRI, (OXID) tag. */
  64        uint16_t hba_wqidx;     /* index to HBA work queue */
  65        struct lpfc_cq_event cq_event;
  66        struct lpfc_wcqe_complete wcqe_cmpl;    /* WQE cmpl */
  67        uint64_t isr_timestamp;
  68
  69        union lpfc_wqe128 wqe;  /* SLI-4 */
  70        IOCB_t iocb;            /* SLI-3 */
  71
  72        uint8_t rsvd2;
  73        uint8_t priority;       /* OAS priority */
  74        uint8_t retry;          /* retry counter for IOCB cmd - if needed */
  75        uint32_t iocb_flag;
  76#define LPFC_IO_LIBDFC          1       /* libdfc iocb */
  77#define LPFC_IO_WAKE            2       /* Synchronous I/O completed */
  78#define LPFC_IO_WAKE_TMO        LPFC_IO_WAKE /* Synchronous I/O timed out */
  79#define LPFC_IO_FCP             4       /* FCP command -- iocbq in scsi_buf */
  80#define LPFC_DRIVER_ABORTED     8       /* driver aborted this request */
  81#define LPFC_IO_FABRIC          0x10    /* Iocb send using fabric scheduler */
  82#define LPFC_DELAY_MEM_FREE     0x20    /* Defer free'ing of FC data */
  83#define LPFC_EXCHANGE_BUSY      0x40    /* SLI4 hba reported XB in response */
  84#define LPFC_USE_FCPWQIDX       0x80    /* Submit to specified FCPWQ index */
  85#define DSS_SECURITY_OP         0x100   /* security IO */
  86#define LPFC_IO_ON_TXCMPLQ      0x200   /* The IO is still on the TXCMPLQ */
  87#define LPFC_IO_DIF_PASS        0x400   /* T10 DIF IO pass-thru prot */
  88#define LPFC_IO_DIF_STRIP       0x800   /* T10 DIF IO strip prot */
  89#define LPFC_IO_DIF_INSERT      0x1000  /* T10 DIF IO insert prot */
  90#define LPFC_IO_CMD_OUTSTANDING 0x2000 /* timeout handler abort window */
  91
  92#define LPFC_FIP_ELS_ID_MASK    0xc000  /* ELS_ID range 0-3, non-shifted mask */
  93#define LPFC_FIP_ELS_ID_SHIFT   14
  94
  95#define LPFC_IO_OAS             0x10000 /* OAS FCP IO */
  96#define LPFC_IO_FOF             0x20000 /* FOF FCP IO */
  97#define LPFC_IO_LOOPBACK        0x40000 /* Loopback IO */
  98#define LPFC_PRLI_NVME_REQ      0x80000 /* This is an NVME PRLI. */
  99#define LPFC_PRLI_FCP_REQ       0x100000 /* This is an NVME PRLI. */
 100#define LPFC_IO_NVME            0x200000 /* NVME FCP command */
 101#define LPFC_IO_NVME_LS         0x400000 /* NVME LS command */
 102#define LPFC_IO_NVMET           0x800000 /* NVMET command */
 103
 104        uint32_t drvrTimeout;   /* driver timeout in seconds */
 105        struct lpfc_vport *vport;/* virtual port pointer */
 106        void *context1;         /* caller context information */
 107        void *context2;         /* caller context information */
 108        void *context3;         /* caller context information */
 109        union {
 110                wait_queue_head_t    *wait_queue;
 111                struct lpfc_iocbq    *rsp_iocb;
 112                struct lpfcMboxq     *mbox;
 113                struct lpfc_nodelist *ndlp;
 114                struct lpfc_node_rrq *rrq;
 115        } context_un;
 116
 117        void (*fabric_iocb_cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 118                           struct lpfc_iocbq *);
 119        void (*wait_iocb_cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 120                           struct lpfc_iocbq *);
 121        void (*iocb_cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 122                           struct lpfc_iocbq *);
 123        void (*wqe_cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
 124                          struct lpfc_wcqe_complete *);
 125};
 126
 127#define SLI_IOCB_RET_IOCB      1        /* Return IOCB if cmd ring full */
 128
 129#define IOCB_SUCCESS        0
 130#define IOCB_BUSY           1
 131#define IOCB_ERROR          2
 132#define IOCB_TIMEDOUT       3
 133
 134#define SLI_WQE_RET_WQE    1    /* Return WQE if cmd ring full */
 135
 136#define WQE_SUCCESS        0
 137#define WQE_BUSY           1
 138#define WQE_ERROR          2
 139#define WQE_TIMEDOUT       3
 140#define WQE_ABORTED        4
 141
 142#define LPFC_MBX_WAKE           1
 143#define LPFC_MBX_IMED_UNREG     2
 144
 145typedef struct lpfcMboxq {
 146        /* MBOXQs are used in single linked lists */
 147        struct list_head list;  /* ptr to next mailbox command */
 148        union {
 149                MAILBOX_t mb;           /* Mailbox cmd */
 150                struct lpfc_mqe mqe;
 151        } u;
 152        struct lpfc_vport *vport; /* virtual port pointer */
 153        void *ctx_ndlp;           /* caller ndlp information */
 154        void *ctx_buf;            /* caller buffer information */
 155        void *context3;
 156
 157        void (*mbox_cmpl) (struct lpfc_hba *, struct lpfcMboxq *);
 158        uint8_t mbox_flag;
 159        uint16_t in_ext_byte_len;
 160        uint16_t out_ext_byte_len;
 161        uint8_t  mbox_offset_word;
 162        struct lpfc_mcqe mcqe;
 163        struct lpfc_mbx_nembed_sge_virt *sge_array;
 164} LPFC_MBOXQ_t;
 165
 166#define MBX_POLL        1       /* poll mailbox till command done, then
 167                                   return */
 168#define MBX_NOWAIT      2       /* issue command then return immediately */
 169
 170#define LPFC_MAX_RING_MASK  5   /* max num of rctl/type masks allowed per
 171                                   ring */
 172#define LPFC_SLI3_MAX_RING  4   /* Max num of SLI3 rings used by driver.
 173                                   For SLI4, an additional ring for each
 174                                   FCP WQ will be allocated.  */
 175
 176struct lpfc_sli_ring;
 177
 178struct lpfc_sli_ring_mask {
 179        uint8_t profile;        /* profile associated with ring */
 180        uint8_t rctl;   /* rctl / type pair configured for ring */
 181        uint8_t type;   /* rctl / type pair configured for ring */
 182        uint8_t rsvd;
 183        /* rcv'd unsol event */
 184        void (*lpfc_sli_rcv_unsol_event) (struct lpfc_hba *,
 185                                         struct lpfc_sli_ring *,
 186                                         struct lpfc_iocbq *);
 187};
 188
 189
 190/* Structure used to hold SLI statistical counters and info */
 191struct lpfc_sli_ring_stat {
 192        uint64_t iocb_event;     /* IOCB event counters */
 193        uint64_t iocb_cmd;       /* IOCB cmd issued */
 194        uint64_t iocb_rsp;       /* IOCB rsp received */
 195        uint64_t iocb_cmd_delay; /* IOCB cmd ring delay */
 196        uint64_t iocb_cmd_full;  /* IOCB cmd ring full */
 197        uint64_t iocb_cmd_empty; /* IOCB cmd ring is now empty */
 198        uint64_t iocb_rsp_full;  /* IOCB rsp ring full */
 199};
 200
 201struct lpfc_sli3_ring {
 202        uint32_t local_getidx;  /* last available cmd index (from cmdGetInx) */
 203        uint32_t next_cmdidx;   /* next_cmd index */
 204        uint32_t rspidx;        /* current index in response ring */
 205        uint32_t cmdidx;        /* current index in command ring */
 206        uint16_t numCiocb;      /* number of command iocb's per ring */
 207        uint16_t numRiocb;      /* number of rsp iocb's per ring */
 208        uint16_t sizeCiocb;     /* Size of command iocb's in this ring */
 209        uint16_t sizeRiocb;     /* Size of response iocb's in this ring */
 210        uint32_t *cmdringaddr;  /* virtual address for cmd rings */
 211        uint32_t *rspringaddr;  /* virtual address for rsp rings */
 212};
 213
 214struct lpfc_sli4_ring {
 215        struct lpfc_queue *wqp; /* Pointer to associated WQ */
 216};
 217
 218
 219/* Structure used to hold SLI ring information */
 220struct lpfc_sli_ring {
 221        uint16_t flag;          /* ring flags */
 222#define LPFC_DEFERRED_RING_EVENT 0x001  /* Deferred processing a ring event */
 223#define LPFC_CALL_RING_AVAILABLE 0x002  /* indicates cmd was full */
 224#define LPFC_STOP_IOCB_EVENT     0x020  /* Stop processing IOCB cmds event */
 225        uint16_t abtsiotag;     /* tracks next iotag to use for ABTS */
 226
 227        uint8_t rsvd;
 228        uint8_t ringno;         /* ring number */
 229
 230        spinlock_t ring_lock;   /* lock for issuing commands */
 231
 232        uint32_t fast_iotag;    /* max fastlookup based iotag           */
 233        uint32_t iotag_ctr;     /* keeps track of the next iotag to use */
 234        uint32_t iotag_max;     /* max iotag value to use               */
 235        struct list_head txq;
 236        uint16_t txq_cnt;       /* current length of queue */
 237        uint16_t txq_max;       /* max length */
 238        struct list_head txcmplq;
 239        uint16_t txcmplq_cnt;   /* current length of queue */
 240        uint16_t txcmplq_max;   /* max length */
 241        uint32_t missbufcnt;    /* keep track of buffers to post */
 242        struct list_head postbufq;
 243        uint16_t postbufq_cnt;  /* current length of queue */
 244        uint16_t postbufq_max;  /* max length */
 245        struct list_head iocb_continueq;
 246        uint16_t iocb_continueq_cnt;    /* current length of queue */
 247        uint16_t iocb_continueq_max;    /* max length */
 248        struct list_head iocb_continue_saveq;
 249
 250        struct lpfc_sli_ring_mask prt[LPFC_MAX_RING_MASK];
 251        uint32_t num_mask;      /* number of mask entries in prt array */
 252        void (*lpfc_sli_rcv_async_status) (struct lpfc_hba *,
 253                struct lpfc_sli_ring *, struct lpfc_iocbq *);
 254
 255        struct lpfc_sli_ring_stat stats;        /* SLI statistical info */
 256
 257        /* cmd ring available */
 258        void (*lpfc_sli_cmd_available) (struct lpfc_hba *,
 259                                        struct lpfc_sli_ring *);
 260        union {
 261                struct lpfc_sli3_ring sli3;
 262                struct lpfc_sli4_ring sli4;
 263        } sli;
 264};
 265
 266/* Structure used for configuring rings to a specific profile or rctl / type */
 267struct lpfc_hbq_init {
 268        uint32_t rn;            /* Receive buffer notification */
 269        uint32_t entry_count;   /* max # of entries in HBQ */
 270        uint32_t headerLen;     /* 0 if not profile 4 or 5 */
 271        uint32_t logEntry;      /* Set to 1 if this HBQ used for LogEntry */
 272        uint32_t profile;       /* Selection profile 0=all, 7=logentry */
 273        uint32_t ring_mask;     /* Binds HBQ to a ring e.g. Ring0=b0001,
 274                                 * ring2=b0100 */
 275        uint32_t hbq_index;     /* index of this hbq in ring .HBQs[] */
 276
 277        uint32_t seqlenoff;
 278        uint32_t maxlen;
 279        uint32_t seqlenbcnt;
 280        uint32_t cmdcodeoff;
 281        uint32_t cmdmatch[8];
 282        uint32_t mask_count;    /* number of mask entries in prt array */
 283        struct hbq_mask hbqMasks[6];
 284
 285        /* Non-config rings fields to keep track of buffer allocations */
 286        uint32_t buffer_count;  /* number of buffers allocated */
 287        uint32_t init_count;    /* number to allocate when initialized */
 288        uint32_t add_count;     /* number to allocate when starved */
 289} ;
 290
 291/* Structure used to hold SLI statistical counters and info */
 292struct lpfc_sli_stat {
 293        uint64_t mbox_stat_err;  /* Mbox cmds completed status error */
 294        uint64_t mbox_cmd;       /* Mailbox commands issued */
 295        uint64_t sli_intr;       /* Count of Host Attention interrupts */
 296        uint64_t sli_prev_intr;  /* Previous cnt of Host Attention interrupts */
 297        uint64_t sli_ips;        /* Host Attention interrupts per sec */
 298        uint32_t err_attn_event; /* Error Attn event counters */
 299        uint32_t link_event;     /* Link event counters */
 300        uint32_t mbox_event;     /* Mailbox event counters */
 301        uint32_t mbox_busy;      /* Mailbox cmd busy */
 302};
 303
 304/* Structure to store link status values when port stats are reset */
 305struct lpfc_lnk_stat {
 306        uint32_t link_failure_count;
 307        uint32_t loss_of_sync_count;
 308        uint32_t loss_of_signal_count;
 309        uint32_t prim_seq_protocol_err_count;
 310        uint32_t invalid_tx_word_count;
 311        uint32_t invalid_crc_count;
 312        uint32_t error_frames;
 313        uint32_t link_events;
 314};
 315
 316/* Structure used to hold SLI information */
 317struct lpfc_sli {
 318        uint32_t num_rings;
 319        uint32_t sli_flag;
 320
 321        /* Additional sli_flags */
 322#define LPFC_SLI_MBOX_ACTIVE      0x100 /* HBA mailbox is currently active */
 323#define LPFC_SLI_ACTIVE           0x200 /* SLI in firmware is active */
 324#define LPFC_PROCESS_LA           0x400 /* Able to process link attention */
 325#define LPFC_BLOCK_MGMT_IO        0x800 /* Don't allow mgmt mbx or iocb cmds */
 326#define LPFC_MENLO_MAINT          0x1000 /* need for menl fw download */
 327#define LPFC_SLI_ASYNC_MBX_BLK    0x2000 /* Async mailbox is blocked */
 328#define LPFC_SLI_SUPPRESS_RSP     0x4000 /* Suppress RSP feature is supported */
 329#define LPFC_SLI_USE_EQDR         0x8000 /* EQ Delay Register is supported */
 330#define LPFC_QUEUE_FREE_INIT      0x10000 /* Queue freeing is in progress */
 331#define LPFC_QUEUE_FREE_WAIT      0x20000 /* Hold Queue free as it is being
 332                                           * used outside worker thread
 333                                           */
 334
 335        struct lpfc_sli_ring *sli3_ring;
 336
 337        struct lpfc_sli_stat slistat;   /* SLI statistical info */
 338        struct list_head mboxq;
 339        uint16_t mboxq_cnt;     /* current length of queue */
 340        uint16_t mboxq_max;     /* max length */
 341        LPFC_MBOXQ_t *mbox_active;      /* active mboxq information */
 342        struct list_head mboxq_cmpl;
 343
 344        struct timer_list mbox_tmo;     /* Hold clk to timeout active mbox
 345                                           cmd */
 346
 347#define LPFC_IOCBQ_LOOKUP_INCREMENT  1024
 348        struct lpfc_iocbq ** iocbq_lookup; /* array to lookup IOCB by IOTAG */
 349        size_t iocbq_lookup_len;           /* current lengs of the array */
 350        uint16_t  last_iotag;              /* last allocated IOTAG */
 351        time64_t  stats_start;             /* in seconds */
 352        struct lpfc_lnk_stat lnk_stat_offsets;
 353};
 354
 355/* Timeout for normal outstanding mbox command (Seconds) */
 356#define LPFC_MBOX_TMO                           30
 357/* Timeout for non-flash-based outstanding sli_config mbox command (Seconds) */
 358#define LPFC_MBOX_SLI4_CONFIG_TMO               60
 359/* Timeout for flash-based outstanding sli_config mbox command (Seconds) */
 360#define LPFC_MBOX_SLI4_CONFIG_EXTENDED_TMO      300
 361/* Timeout for other flash-based outstanding mbox command (Seconds) */
 362#define LPFC_MBOX_TMO_FLASH_CMD                 300
 363
 364struct lpfc_io_buf {
 365        /* Common fields */
 366        struct list_head list;
 367        void *data;
 368
 369        dma_addr_t dma_handle;
 370        dma_addr_t dma_phys_sgl;
 371
 372        struct sli4_sge *dma_sgl; /* initial segment chunk */
 373
 374        /* linked list of extra sli4_hybrid_sge */
 375        struct list_head dma_sgl_xtra_list;
 376
 377        /* list head for fcp_cmd_rsp buf */
 378        struct list_head dma_cmd_rsp_list;
 379
 380        struct lpfc_iocbq cur_iocbq;
 381        struct lpfc_sli4_hdw_queue *hdwq;
 382        uint16_t hdwq_no;
 383        uint16_t cpu;
 384
 385        struct lpfc_nodelist *ndlp;
 386        uint32_t timeout;
 387        uint16_t flags;
 388#define LPFC_SBUF_XBUSY         0x1     /* SLI4 hba reported XB on WCQE cmpl */
 389#define LPFC_SBUF_BUMP_QDEPTH   0x2     /* bumped queue depth counter */
 390                                        /* External DIF device IO conversions */
 391#define LPFC_SBUF_NORMAL_DIF    0x4     /* normal mode to insert/strip */
 392#define LPFC_SBUF_PASS_DIF      0x8     /* insert/strip mode to passthru */
 393#define LPFC_SBUF_NOT_POSTED    0x10    /* SGL failed post to FW. */
 394        uint16_t status;        /* From IOCB Word 7- ulpStatus */
 395        uint32_t result;        /* From IOCB Word 4. */
 396
 397        uint32_t   seg_cnt;     /* Number of scatter-gather segments returned by
 398                                 * dma_map_sg.  The driver needs this for calls
 399                                 * to dma_unmap_sg.
 400                                 */
 401        unsigned long start_time;
 402        spinlock_t buf_lock;    /* lock used in case of simultaneous abort */
 403        bool expedite;          /* this is an expedite io_buf */
 404
 405        union {
 406                /* SCSI specific fields */
 407                struct {
 408                        struct scsi_cmnd *pCmd;
 409                        struct lpfc_rport_data *rdata;
 410                        uint32_t prot_seg_cnt;  /* seg_cnt's counterpart for
 411                                                 * protection data
 412                                                 */
 413
 414                        /*
 415                         * data and dma_handle are the kernel virtual and bus
 416                         * address of the dma-able buffer containing the
 417                         * fcp_cmd, fcp_rsp and a scatter gather bde list that
 418                         * supports the sg_tablesize value.
 419                         */
 420                        struct fcp_cmnd *fcp_cmnd;
 421                        struct fcp_rsp *fcp_rsp;
 422
 423                        wait_queue_head_t *waitq;
 424
 425#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 426                        /* Used to restore any changes to protection data for
 427                         * error injection
 428                         */
 429                        void *prot_data_segment;
 430                        uint32_t prot_data;
 431                        uint32_t prot_data_type;
 432#define LPFC_INJERR_REFTAG      1
 433#define LPFC_INJERR_APPTAG      2
 434#define LPFC_INJERR_GUARD       3
 435#endif
 436                };
 437
 438                /* NVME specific fields */
 439                struct {
 440                        struct nvmefc_fcp_req *nvmeCmd;
 441                        uint16_t qidx;
 442                };
 443        };
 444#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 445        uint64_t ts_cmd_start;
 446        uint64_t ts_last_cmd;
 447        uint64_t ts_cmd_wqput;
 448        uint64_t ts_isr_cmpl;
 449        uint64_t ts_data_io;
 450#endif
 451};
 452