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
9#define NVME_RDMA_MAX_QUEUE_SIZE 128
10
11enum nvme_rdma_cm_fmt {
12 NVME_RDMA_CM_FMT_1_0 = 0x0,
13};
14
15enum nvme_rdma_cm_status {
16 NVME_RDMA_CM_INVALID_LEN = 0x01,
17 NVME_RDMA_CM_INVALID_RECFMT = 0x02,
18 NVME_RDMA_CM_INVALID_QID = 0x03,
19 NVME_RDMA_CM_INVALID_HSQSIZE = 0x04,
20 NVME_RDMA_CM_INVALID_HRQSIZE = 0x05,
21 NVME_RDMA_CM_NO_RSC = 0x06,
22 NVME_RDMA_CM_INVALID_IRD = 0x07,
23 NVME_RDMA_CM_INVALID_ORD = 0x08,
24};
25
26static inline const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status)
27{
28 switch (status) {
29 case NVME_RDMA_CM_INVALID_LEN:
30 return "invalid length";
31 case NVME_RDMA_CM_INVALID_RECFMT:
32 return "invalid record format";
33 case NVME_RDMA_CM_INVALID_QID:
34 return "invalid queue ID";
35 case NVME_RDMA_CM_INVALID_HSQSIZE:
36 return "invalid host SQ size";
37 case NVME_RDMA_CM_INVALID_HRQSIZE:
38 return "invalid host RQ size";
39 case NVME_RDMA_CM_NO_RSC:
40 return "resource not found";
41 case NVME_RDMA_CM_INVALID_IRD:
42 return "invalid IRD";
43 case NVME_RDMA_CM_INVALID_ORD:
44 return "Invalid ORD";
45 default:
46 return "unrecognized reason";
47 }
48}
49
50/**
51 * struct nvme_rdma_cm_req - rdma connect request
52 *
53 * @recfmt: format of the RDMA Private Data
54 * @qid: queue Identifier for the Admin or I/O Queue
55 * @hrqsize: host receive queue size to be created
56 * @hsqsize: host send queue size to be created
57 */
58struct nvme_rdma_cm_req {
59 __le16 recfmt;
60 __le16 qid;
61 __le16 hrqsize;
62 __le16 hsqsize;
63 u8 rsvd[24];
64};
65
66/**
67 * struct nvme_rdma_cm_rep - rdma connect reply
68 *
69 * @recfmt: format of the RDMA Private Data
70 * @crqsize: controller receive queue size
71 */
72struct nvme_rdma_cm_rep {
73 __le16 recfmt;
74 __le16 crqsize;
75 u8 rsvd[28];
76};
77
78/**
79 * struct nvme_rdma_cm_rej - rdma connect reject
80 *
81 * @recfmt: format of the RDMA Private Data
82 * @sts: error status for the associated connect request
83 */
84struct nvme_rdma_cm_rej {
85 __le16 recfmt;
86 __le16 sts;
87};
88
89#endif /* _LINUX_NVME_RDMA_H */
90

source code of linux/include/linux/nvme-rdma.h