Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-2.6-microblaze.git] / include / linux / 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_MAX_QUEUE_SIZE        128
10
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
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
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
82  * @sts:           error status for the associated connect request
83  */
84 struct nvme_rdma_cm_rej {
85         __le16          recfmt;
86         __le16          sts;
87 };
88
89 #endif /* _LINUX_NVME_RDMA_H */