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 * @fsts: 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