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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_IP_PORT 4420
10
11#define NVME_RDMA_MAX_QUEUE_SIZE 256
12#define NVME_RDMA_MAX_METADATA_QUEUE_SIZE 128
13#define NVME_RDMA_DEFAULT_QUEUE_SIZE 128
14
15enum nvme_rdma_cm_fmt {
16 NVME_RDMA_CM_FMT_1_0 = 0x0,
17};
18
19enum nvme_rdma_cm_status {
20 NVME_RDMA_CM_INVALID_LEN = 0x01,
21 NVME_RDMA_CM_INVALID_RECFMT = 0x02,
22 NVME_RDMA_CM_INVALID_QID = 0x03,
23 NVME_RDMA_CM_INVALID_HSQSIZE = 0x04,
24 NVME_RDMA_CM_INVALID_HRQSIZE = 0x05,
25 NVME_RDMA_CM_NO_RSC = 0x06,
26 NVME_RDMA_CM_INVALID_IRD = 0x07,
27 NVME_RDMA_CM_INVALID_ORD = 0x08,
28 NVME_RDMA_CM_INVALID_CNTLID = 0x09,
29};
30
31static inline const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status)
32{
33 switch (status) {
34 case NVME_RDMA_CM_INVALID_LEN:
35 return "invalid length";
36 case NVME_RDMA_CM_INVALID_RECFMT:
37 return "invalid record format";
38 case NVME_RDMA_CM_INVALID_QID:
39 return "invalid queue ID";
40 case NVME_RDMA_CM_INVALID_HSQSIZE:
41 return "invalid host SQ size";
42 case NVME_RDMA_CM_INVALID_HRQSIZE:
43 return "invalid host RQ size";
44 case NVME_RDMA_CM_NO_RSC:
45 return "resource not found";
46 case NVME_RDMA_CM_INVALID_IRD:
47 return "invalid IRD";
48 case NVME_RDMA_CM_INVALID_ORD:
49 return "Invalid ORD";
50 case NVME_RDMA_CM_INVALID_CNTLID:
51 return "invalid controller ID";
52 default:
53 return "unrecognized reason";
54 }
55}
56
57/**
58 * struct nvme_rdma_cm_req - rdma connect request
59 *
60 * @recfmt: format of the RDMA Private Data
61 * @qid: queue Identifier for the Admin or I/O Queue
62 * @hrqsize: host receive queue size to be created
63 * @hsqsize: host send queue size to be created
64 */
65struct nvme_rdma_cm_req {
66 __le16 recfmt;
67 __le16 qid;
68 __le16 hrqsize;
69 __le16 hsqsize;
70 __le16 cntlid;
71 u8 rsvd[22];
72};
73
74/**
75 * struct nvme_rdma_cm_rep - rdma connect reply
76 *
77 * @recfmt: format of the RDMA Private Data
78 * @crqsize: controller receive queue size
79 */
80struct nvme_rdma_cm_rep {
81 __le16 recfmt;
82 __le16 crqsize;
83 u8 rsvd[28];
84};
85
86/**
87 * struct nvme_rdma_cm_rej - rdma connect reject
88 *
89 * @recfmt: format of the RDMA Private Data
90 * @sts: error status for the associated connect request
91 */
92struct nvme_rdma_cm_rej {
93 __le16 recfmt;
94 __le16 sts;
95};
96
97#endif /* _LINUX_NVME_RDMA_H */