[mirror_ubuntu-bionic-kernel.git] / include / linux / nvme-rdma.h

/*
 * Copyright (c) 2015 Mellanox Technologies. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 */

#ifndef _LINUX_NVME_RDMA_H
#define _LINUX_NVME_RDMA_H

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
 * @fsts:          error status for the associated connect request
 */
struct nvme_rdma_cm_rej {
	__le16		recfmt;
	__le16		sts;
};

#endif /* _LINUX_NVME_RDMA_H */
Commit	Line	Data
931a6de4 SG	1	/*
	2	* Copyright (c) 2015 Mellanox Technologies. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms and conditions of the GNU General Public License,
	6	* version 2, as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*/
	13
	14	#ifndef _LINUX_NVME_RDMA_H
	15	#define _LINUX_NVME_RDMA_H
	16
	17	enum nvme_rdma_cm_fmt {
	18	NVME_RDMA_CM_FMT_1_0 = 0x0,
	19	};
	20
	21	enum nvme_rdma_cm_status {
	22	NVME_RDMA_CM_INVALID_LEN = 0x01,
	23	NVME_RDMA_CM_INVALID_RECFMT = 0x02,
	24	NVME_RDMA_CM_INVALID_QID = 0x03,
	25	NVME_RDMA_CM_INVALID_HSQSIZE = 0x04,
	26	NVME_RDMA_CM_INVALID_HRQSIZE = 0x05,
	27	NVME_RDMA_CM_NO_RSC = 0x06,
	28	NVME_RDMA_CM_INVALID_IRD = 0x07,
	29	NVME_RDMA_CM_INVALID_ORD = 0x08,
	30	};
	31
3ee80c3d MG	32	static inline const char *nvme_rdma_cm_msg(enum nvme_rdma_cm_status status)
	33	{
	34	switch (status) {
	35	case NVME_RDMA_CM_INVALID_LEN:
	36	return "invalid length";
	37	case NVME_RDMA_CM_INVALID_RECFMT:
	38	return "invalid record format";
	39	case NVME_RDMA_CM_INVALID_QID:
	40	return "invalid queue ID";
	41	case NVME_RDMA_CM_INVALID_HSQSIZE:
	42	return "invalid host SQ size";
	43	case NVME_RDMA_CM_INVALID_HRQSIZE:
	44	return "invalid host RQ size";
	45	case NVME_RDMA_CM_NO_RSC:
	46	return "resource not found";
	47	case NVME_RDMA_CM_INVALID_IRD:
	48	return "invalid IRD";
	49	case NVME_RDMA_CM_INVALID_ORD:
	50	return "Invalid ORD";
	51	default:
	52	return "unrecognized reason";
	53	}
	54	}
	55
931a6de4 SG	56	/**
	57	* struct nvme_rdma_cm_req - rdma connect request
	58	*
	59	* @recfmt: format of the RDMA Private Data
	60	* @qid: queue Identifier for the Admin or I/O Queue
	61	* @hrqsize: host receive queue size to be created
	62	* @hsqsize: host send queue size to be created
	63	*/
	64	struct nvme_rdma_cm_req {
	65	__le16 recfmt;
	66	__le16 qid;
	67	__le16 hrqsize;
	68	__le16 hsqsize;
	69	u8 rsvd[24];
	70	};
	71
	72	/**
	73	* struct nvme_rdma_cm_rep - rdma connect reply
	74	*
	75	* @recfmt: format of the RDMA Private Data
	76	* @crqsize: controller receive queue size
	77	*/
	78	struct nvme_rdma_cm_rep {
	79	__le16 recfmt;
	80	__le16 crqsize;
	81	u8 rsvd[28];
	82	};
	83
	84	/**
	85	* struct nvme_rdma_cm_rej - rdma connect reject
	86	*
	87	* @recfmt: format of the RDMA Private Data
	88	* @fsts: error status for the associated connect request
	89	*/
	90	struct nvme_rdma_cm_rej {
	91	__le16 recfmt;
	92	__le16 sts;
	93	};
	94
	95	#endif /* _LINUX_NVME_RDMA_H */