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44c3c6257e
Corrent limit of 1024 isn't valid for some of the RDMA based ctrls. In case the target expose a cap of larger amount of entries (e.g. 1024), the initiator may fail to create a QP with this size. Thus limit to a value that works for all RDMA adapters. Future general solution should use RDMA/core API to calculate this size according to device capabilities and number of WRs needed per NVMe IO request. Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2015 Mellanox Technologies. All rights reserved.
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*/
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#ifndef _LINUX_NVME_RDMA_H
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#define _LINUX_NVME_RDMA_H
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#define NVME_RDMA_MAX_QUEUE_SIZE 128
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enum nvme_rdma_cm_fmt {
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NVME_RDMA_CM_FMT_1_0 = 0x0,
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};
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enum nvme_rdma_cm_status {
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NVME_RDMA_CM_INVALID_LEN = 0x01,
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NVME_RDMA_CM_INVALID_RECFMT = 0x02,
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NVME_RDMA_CM_INVALID_QID = 0x03,
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NVME_RDMA_CM_INVALID_HSQSIZE = 0x04,
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NVME_RDMA_CM_INVALID_HRQSIZE = 0x05,
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NVME_RDMA_CM_NO_RSC = 0x06,
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NVME_RDMA_CM_INVALID_IRD = 0x07,
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NVME_RDMA_CM_INVALID_ORD = 0x08,
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};
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static inline const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status)
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{
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switch (status) {
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case NVME_RDMA_CM_INVALID_LEN:
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return "invalid length";
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case NVME_RDMA_CM_INVALID_RECFMT:
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return "invalid record format";
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case NVME_RDMA_CM_INVALID_QID:
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return "invalid queue ID";
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case NVME_RDMA_CM_INVALID_HSQSIZE:
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return "invalid host SQ size";
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case NVME_RDMA_CM_INVALID_HRQSIZE:
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return "invalid host RQ size";
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case NVME_RDMA_CM_NO_RSC:
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return "resource not found";
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case NVME_RDMA_CM_INVALID_IRD:
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return "invalid IRD";
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case NVME_RDMA_CM_INVALID_ORD:
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return "Invalid ORD";
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default:
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return "unrecognized reason";
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}
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}
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/**
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* struct nvme_rdma_cm_req - rdma connect request
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*
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* @recfmt: format of the RDMA Private Data
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* @qid: queue Identifier for the Admin or I/O Queue
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* @hrqsize: host receive queue size to be created
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* @hsqsize: host send queue size to be created
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*/
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struct nvme_rdma_cm_req {
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__le16 recfmt;
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__le16 qid;
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__le16 hrqsize;
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__le16 hsqsize;
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u8 rsvd[24];
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};
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/**
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* struct nvme_rdma_cm_rep - rdma connect reply
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*
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* @recfmt: format of the RDMA Private Data
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* @crqsize: controller receive queue size
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*/
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struct nvme_rdma_cm_rep {
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__le16 recfmt;
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__le16 crqsize;
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u8 rsvd[28];
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};
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/**
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* struct nvme_rdma_cm_rej - rdma connect reject
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*
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* @recfmt: format of the RDMA Private Data
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* @sts: error status for the associated connect request
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*/
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struct nvme_rdma_cm_rej {
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__le16 recfmt;
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__le16 sts;
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};
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#endif /* _LINUX_NVME_RDMA_H */
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