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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2015 Mellanox Technologies. All rights reserved.
*/
#ifndef _LINUX_NVME_RDMA_H
#define _LINUX_NVME_RDMA_H
#define NVME_RDMA_MAX_QUEUE_SIZE 128
enum nvme_rdma_cm_fmt {
NVME_RDMA_CM_FMT_1_0 = 0x0,
};
enum nvme_rdma_cm_status {
NVME_RDMA_CM_INVALID_LEN = 0x01,
NVME_RDMA_CM_INVALID_RECFMT = 0x02,
NVME_RDMA_CM_INVALID_QID = 0x03,
NVME_RDMA_CM_INVALID_HSQSIZE = 0x04,
NVME_RDMA_CM_INVALID_HRQSIZE = 0x05,
NVME_RDMA_CM_NO_RSC = 0x06,
NVME_RDMA_CM_INVALID_IRD = 0x07,
NVME_RDMA_CM_INVALID_ORD = 0x08,
};
static inline const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status)
{
switch (status) {
case NVME_RDMA_CM_INVALID_LEN:
return "invalid length";
case NVME_RDMA_CM_INVALID_RECFMT:
return "invalid record format";
case NVME_RDMA_CM_INVALID_QID:
return "invalid queue ID";
case NVME_RDMA_CM_INVALID_HSQSIZE:
return "invalid host SQ size";
case NVME_RDMA_CM_INVALID_HRQSIZE:
return "invalid host RQ size";
case NVME_RDMA_CM_NO_RSC:
return "resource not found";
case NVME_RDMA_CM_INVALID_IRD:
return "invalid IRD";
case NVME_RDMA_CM_INVALID_ORD:
return "Invalid ORD";
default:
return "unrecognized reason";
}
}
/**
* struct nvme_rdma_cm_req - rdma connect request
*
* @recfmt: format of the RDMA Private Data
* @qid: queue Identifier for the Admin or I/O Queue
* @hrqsize: host receive queue size to be created
* @hsqsize: host send queue size to be created
*/
struct nvme_rdma_cm_req {
__le16 recfmt;
__le16 qid;
__le16 hrqsize;
__le16 hsqsize;
u8 rsvd[24];
};
/**
* struct nvme_rdma_cm_rep - rdma connect reply
*
* @recfmt: format of the RDMA Private Data
* @crqsize: controller receive queue size
*/
struct nvme_rdma_cm_rep {
__le16 recfmt;
__le16 crqsize;
u8 rsvd[28];
};
/**
* struct nvme_rdma_cm_rej - rdma connect reject
*
* @recfmt: format of the RDMA Private Data
* @sts: error status for the associated connect request
*/
struct nvme_rdma_cm_rej {
__le16 recfmt;
__le16 sts;
};
#endif /* _LINUX_NVME_RDMA_H */