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5d8762d5 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
931a6de4 SG |
2 | /* |
3 | * Copyright (c) 2015 Mellanox Technologies. All rights reserved. | |
931a6de4 SG |
4 | */ |
5 | ||
6 | #ifndef _LINUX_NVME_RDMA_H | |
7 | #define _LINUX_NVME_RDMA_H | |
8 | ||
44c3c625 MG |
9 | #define NVME_RDMA_MAX_QUEUE_SIZE 128 |
10 | ||
931a6de4 SG |
11 | enum nvme_rdma_cm_fmt { |
12 | NVME_RDMA_CM_FMT_1_0 = 0x0, | |
13 | }; | |
14 | ||
15 | enum 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 | ||
3ee80c3d MG |
26 | static 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 | ||
931a6de4 SG |
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 | */ | |
58 | struct 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 | */ | |
72 | struct 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 | |
82bebbde | 82 | * @sts: error status for the associated connect request |
931a6de4 SG |
83 | */ |
84 | struct nvme_rdma_cm_rej { | |
85 | __le16 recfmt; | |
86 | __le16 sts; | |
87 | }; | |
88 | ||
89 | #endif /* _LINUX_NVME_RDMA_H */ |