drivers/scsi/lpfc/lpfc_nvme.h

   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
  37 struct 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
  43 struct 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. */
  51 struct lpfc_nvme_lport {
  52         struct lpfc_vport *vport;
  53         struct completion lport_unreg_done;
  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
  72 struct 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
  79 struct 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
 130 struct lpfc_nvme_fcpreq_priv {
 131         struct lpfc_nvme_buf *nvme_buf;
 132 };