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 Broadcom. All Rights Reserved. The term      *
   5  * “Broadcom” refers to Broadcom Limited 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_MIN_SEGS              16
  25 #define LPFC_NVME_DEFAULT_SEGS          66      /* 256K IOs - 64 + 2 */
  26 #define LPFC_NVME_MAX_SEGS              510
  27 #define LPFC_NVMET_MIN_POSTBUF          16
  28 #define LPFC_NVMET_DEFAULT_POSTBUF      1024
  29 #define LPFC_NVMET_MAX_POSTBUF          4096
  30 #define LPFC_NVME_WQSIZE                256
  31
  32 #define LPFC_NVME_ERSP_LEN              0x20
  33
  34 struct lpfc_nvme_qhandle {
  35         uint32_t index;         /* WQ index to use */
  36         uint32_t qidx;          /* queue index passed to create */
  37         uint32_t cpu_id;        /* current cpu id at time of create */
  38 };
  39
  40 /* Declare nvme-based local and remote port definitions. */
  41 struct lpfc_nvme_lport {
  42         struct lpfc_vport *vport;
  43         struct list_head rport_list;
  44         struct completion lport_unreg_done;
  45         /* Add sttats counters here */
  46 };
  47
  48 struct lpfc_nvme_rport {
  49         struct list_head list;
  50         struct lpfc_nvme_lport *lport;
  51         struct nvme_fc_remote_port *remoteport;
  52         struct lpfc_nodelist *ndlp;
  53         struct completion rport_unreg_done;
  54 };
  55
  56 struct lpfc_nvme_buf {
  57         struct list_head list;
  58         struct nvmefc_fcp_req *nvmeCmd;
  59         struct lpfc_nvme_rport *nrport;
  60
  61         uint32_t timeout;
  62
  63         uint16_t flags;  /* TBD convert exch_busy to flags */
  64 #define LPFC_SBUF_XBUSY         0x1     /* SLI4 hba reported XB on WCQE cmpl */
  65         uint16_t exch_busy;     /* SLI4 hba reported XB on complete WCQE */
  66         uint16_t status;        /* From IOCB Word 7- ulpStatus */
  67         uint16_t cpu;
  68         uint16_t qidx;
  69         uint16_t sqid;
  70         uint32_t result;        /* From IOCB Word 4. */
  71
  72         uint32_t   seg_cnt;     /* Number of scatter-gather segments returned by
  73                                  * dma_map_sg.  The driver needs this for calls
  74                                  * to dma_unmap_sg.
  75                                  */
  76         dma_addr_t nonsg_phys;  /* Non scatter-gather physical address. */
  77
  78         /*
  79          * data and dma_handle are the kernel virtual and bus address of the
  80          * dma-able buffer containing the fcp_cmd, fcp_rsp and a scatter
  81          * gather bde list that supports the sg_tablesize value.
  82          */
  83         void *data;
  84         dma_addr_t dma_handle;
  85
  86         struct sli4_sge *nvme_sgl;
  87         dma_addr_t dma_phys_sgl;
  88
  89         /* cur_iocbq has phys of the dma-able buffer.
  90          * Iotag is in here
  91          */
  92         struct lpfc_iocbq cur_iocbq;
  93
  94         wait_queue_head_t *waitq;
  95         unsigned long start_time;
  96 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
  97         uint64_t ts_cmd_start;
  98         uint64_t ts_last_cmd;
  99         uint64_t ts_cmd_wqput;
 100         uint64_t ts_isr_cmpl;
 101         uint64_t ts_data_nvme;
 102 #endif
 103 };