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