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) 2017-2018 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 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
  10 *                                                                 *
  11 * This program is free software; you can redistribute it and/or   *
  12 * modify it under the terms of version 2 of the GNU General       *
  13 * Public License as published by the Free Software Foundation.    *
  14 * This program is distributed in the hope that it will be useful. *
  15 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
  16 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
  17 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
  18 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
  19 * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
  20 * more details, a copy of which can be found in the file COPYING  *
  21 * included with this package.                                     *
  22 ********************************************************************/
  23
  24#define LPFC_NVME_DEFAULT_SEGS          (64 + 1)        /* 256K IOs */
  25
  26#define LPFC_NVME_ERSP_LEN              0x20
  27
  28#define LPFC_NVME_WAIT_TMO              10
  29#define LPFC_NVME_EXPEDITE_XRICNT       8
  30#define LPFC_NVME_FB_SHIFT              9
  31#define LPFC_NVME_MAX_FB                (1 << 20)       /* 1M */
  32
  33#define lpfc_ndlp_get_nrport(ndlp)                                      \
  34        ((!ndlp->nrport || (ndlp->upcall_flags & NLP_WAIT_FOR_UNREG))   \
  35        ? NULL : ndlp->nrport)
  36
  37struct lpfc_nvme_qhandle {
  38        uint32_t index;         /* WQ index to use */
  39        uint32_t qidx;          /* queue index passed to create */
  40        uint32_t cpu_id;        /* current cpu id at time of create */
  41};
  42
  43struct lpfc_nvme_ctrl_stat {
  44        atomic_t fc4NvmeInputRequests;
  45        atomic_t fc4NvmeOutputRequests;
  46        atomic_t fc4NvmeControlRequests;
  47        atomic_t fc4NvmeIoCmpls;
  48};
  49
  50/* Declare nvme-based local and remote port definitions. */
  51struct lpfc_nvme_lport {
  52        struct lpfc_vport *vport;
  53        struct completion *lport_unreg_cmp;
  54        /* Add stats counters here */
  55        struct lpfc_nvme_ctrl_stat *cstat;
  56        atomic_t fc4NvmeLsRequests;
  57        atomic_t fc4NvmeLsCmpls;
  58        atomic_t xmt_fcp_noxri;
  59        atomic_t xmt_fcp_bad_ndlp;
  60        atomic_t xmt_fcp_qdepth;
  61        atomic_t xmt_fcp_wqerr;
  62        atomic_t xmt_fcp_err;
  63        atomic_t xmt_fcp_abort;
  64        atomic_t xmt_ls_abort;
  65        atomic_t xmt_ls_err;
  66        atomic_t cmpl_fcp_xb;
  67        atomic_t cmpl_fcp_err;
  68        atomic_t cmpl_ls_xb;
  69        atomic_t cmpl_ls_err;
  70};
  71
  72struct lpfc_nvme_rport {
  73        struct lpfc_nvme_lport *lport;
  74        struct nvme_fc_remote_port *remoteport;
  75        struct lpfc_nodelist *ndlp;
  76        struct completion rport_unreg_done;
  77};
  78
  79struct lpfc_nvme_buf {
  80        struct list_head list;
  81        struct nvmefc_fcp_req *nvmeCmd;
  82        struct lpfc_nvme_rport *nrport;
  83        struct lpfc_nodelist *ndlp;
  84
  85        uint32_t timeout;
  86
  87        uint16_t flags;  /* TBD convert exch_busy to flags */
  88#define LPFC_SBUF_XBUSY         0x1     /* SLI4 hba reported XB on WCQE cmpl */
  89#define LPFC_BUMP_QDEPTH        0x2     /* bumped queue depth counter */
  90        uint16_t exch_busy;     /* SLI4 hba reported XB on complete WCQE */
  91        uint16_t status;        /* From IOCB Word 7- ulpStatus */
  92        uint16_t cpu;
  93        uint16_t qidx;
  94        uint16_t sqid;
  95        uint32_t result;        /* From IOCB Word 4. */
  96
  97        uint32_t   seg_cnt;     /* Number of scatter-gather segments returned by
  98                                 * dma_map_sg.  The driver needs this for calls
  99                                 * to dma_unmap_sg.
 100                                 */
 101        dma_addr_t nonsg_phys;  /* Non scatter-gather physical address. */
 102
 103        /*
 104         * data and dma_handle are the kernel virtual and bus address of the
 105         * dma-able buffer containing the fcp_cmd, fcp_rsp and a scatter
 106         * gather bde list that supports the sg_tablesize value.
 107         */
 108        void *data;
 109        dma_addr_t dma_handle;
 110
 111        struct sli4_sge *nvme_sgl;
 112        dma_addr_t dma_phys_sgl;
 113
 114        /* cur_iocbq has phys of the dma-able buffer.
 115         * Iotag is in here
 116         */
 117        struct lpfc_iocbq cur_iocbq;
 118
 119        wait_queue_head_t *waitq;
 120        unsigned long start_time;
 121#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 122        uint64_t ts_cmd_start;
 123        uint64_t ts_last_cmd;
 124        uint64_t ts_cmd_wqput;
 125        uint64_t ts_isr_cmpl;
 126        uint64_t ts_data_nvme;
 127#endif
 128};
 129
 130struct lpfc_nvme_fcpreq_priv {
 131        struct lpfc_nvme_buf *nvme_buf;
 132};
 133