include/linux/nvme-rdma.h

   1 /*
   2  * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  */
  13
  14 #ifndef _LINUX_NVME_RDMA_H
  15 #define _LINUX_NVME_RDMA_H
  16
  17 enum nvme_rdma_cm_fmt {
  18         NVME_RDMA_CM_FMT_1_0 = 0x0,
  19 };
  20
  21 enum nvme_rdma_cm_status {
  22         NVME_RDMA_CM_INVALID_LEN        = 0x01,
  23         NVME_RDMA_CM_INVALID_RECFMT     = 0x02,
  24         NVME_RDMA_CM_INVALID_QID        = 0x03,
  25         NVME_RDMA_CM_INVALID_HSQSIZE    = 0x04,
  26         NVME_RDMA_CM_INVALID_HRQSIZE    = 0x05,
  27         NVME_RDMA_CM_NO_RSC             = 0x06,
  28         NVME_RDMA_CM_INVALID_IRD        = 0x07,
  29         NVME_RDMA_CM_INVALID_ORD        = 0x08,
  30 };
  31
  32 /**
  33  * struct nvme_rdma_cm_req - rdma connect request
  34  *
  35  * @recfmt:        format of the RDMA Private Data
  36  * @qid:           queue Identifier for the Admin or I/O Queue
  37  * @hrqsize:       host receive queue size to be created
  38  * @hsqsize:       host send queue size to be created
  39  */
  40 struct nvme_rdma_cm_req {
  41         __le16          recfmt;
  42         __le16          qid;
  43         __le16          hrqsize;
  44         __le16          hsqsize;
  45         u8              rsvd[24];
  46 };
  47
  48 /**
  49  * struct nvme_rdma_cm_rep - rdma connect reply
  50  *
  51  * @recfmt:        format of the RDMA Private Data
  52  * @crqsize:       controller receive queue size
  53  */
  54 struct nvme_rdma_cm_rep {
  55         __le16          recfmt;
  56         __le16          crqsize;
  57         u8              rsvd[28];
  58 };
  59
  60 /**
  61  * struct nvme_rdma_cm_rej - rdma connect reject
  62  *
  63  * @recfmt:        format of the RDMA Private Data
  64  * @fsts:          error status for the associated connect request
  65  */
  66 struct nvme_rdma_cm_rej {
  67         __le16          recfmt;
  68         __le16          sts;
  69 };
  70
  71 #endif /* _LINUX_NVME_RDMA_H */