nvme-rdma.h

 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 */