LXR linux/include/linux/nvme-rdma.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
   4 */
   5
   6#ifndef _LINUX_NVME_RDMA_H
   7#define _LINUX_NVME_RDMA_H
   8
   9enum nvme_rdma_cm_fmt {
  10        NVME_RDMA_CM_FMT_1_0 = 0x0,
  11};
  12
  13enum nvme_rdma_cm_status {
  14        NVME_RDMA_CM_INVALID_LEN        = 0x01,
  15        NVME_RDMA_CM_INVALID_RECFMT     = 0x02,
  16        NVME_RDMA_CM_INVALID_QID        = 0x03,
  17        NVME_RDMA_CM_INVALID_HSQSIZE    = 0x04,
  18        NVME_RDMA_CM_INVALID_HRQSIZE    = 0x05,
  19        NVME_RDMA_CM_NO_RSC             = 0x06,
  20        NVME_RDMA_CM_INVALID_IRD        = 0x07,
  21        NVME_RDMA_CM_INVALID_ORD        = 0x08,
  22};
  23
  24static inline const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status)
  25{
  26        switch (status) {
  27        case NVME_RDMA_CM_INVALID_LEN:
  28                return "invalid length";
  29        case NVME_RDMA_CM_INVALID_RECFMT:
  30                return "invalid record format";
  31        case NVME_RDMA_CM_INVALID_QID:
  32                return "invalid queue ID";
  33        case NVME_RDMA_CM_INVALID_HSQSIZE:
  34                return "invalid host SQ size";
  35        case NVME_RDMA_CM_INVALID_HRQSIZE:
  36                return "invalid host RQ size";
  37        case NVME_RDMA_CM_NO_RSC:
  38                return "resource not found";
  39        case NVME_RDMA_CM_INVALID_IRD:
  40                return "invalid IRD";
  41        case NVME_RDMA_CM_INVALID_ORD:
  42                return "Invalid ORD";
  43        default:
  44                return "unrecognized reason";
  45        }
  46}
  47
  48/**
  49 * struct nvme_rdma_cm_req - rdma connect request
  50 *
  51 * @recfmt:        format of the RDMA Private Data
  52 * @qid:           queue Identifier for the Admin or I/O Queue
  53 * @hrqsize:       host receive queue size to be created
  54 * @hsqsize:       host send queue size to be created
  55 */
  56struct nvme_rdma_cm_req {
  57        __le16          recfmt;
  58        __le16          qid;
  59        __le16          hrqsize;
  60        __le16          hsqsize;
  61        u8              rsvd[24];
  62};
  63
  64/**
  65 * struct nvme_rdma_cm_rep - rdma connect reply
  66 *
  67 * @recfmt:        format of the RDMA Private Data
  68 * @crqsize:       controller receive queue size
  69 */
  70struct nvme_rdma_cm_rep {
  71        __le16          recfmt;
  72        __le16          crqsize;
  73        u8              rsvd[28];
  74};
  75
  76/**
  77 * struct nvme_rdma_cm_rej - rdma connect reject
  78 *
  79 * @recfmt:        format of the RDMA Private Data
  80 * @sts:           error status for the associated connect request
  81 */
  82struct nvme_rdma_cm_rej {
  83        __le16          recfmt;
  84        __le16          sts;
  85};
  86
  87#endif /* _LINUX_NVME_RDMA_H */
  88