192 lines
4.5 KiB
C
192 lines
4.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* NVMe over Fabrics TCP protocol header.
|
|
* Copyright (c) 2018 Lightbits Labs. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _LINUX_NVME_TCP_H
|
|
#define _LINUX_NVME_TCP_H
|
|
|
|
#include <linux/nvme.h>
|
|
|
|
#define NVME_TCP_DISC_PORT 8009
|
|
#define NVME_TCP_ADMIN_CCSZ SZ_8K
|
|
#define NVME_TCP_DIGEST_LENGTH 4
|
|
#define NVME_TCP_MIN_MAXH2CDATA 4096
|
|
|
|
enum nvme_tcp_pfv {
|
|
NVME_TCP_PFV_1_0 = 0x0,
|
|
};
|
|
|
|
enum nvme_tcp_fatal_error_status {
|
|
NVME_TCP_FES_INVALID_PDU_HDR = 0x01,
|
|
NVME_TCP_FES_PDU_SEQ_ERR = 0x02,
|
|
NVME_TCP_FES_HDR_DIGEST_ERR = 0x03,
|
|
NVME_TCP_FES_DATA_OUT_OF_RANGE = 0x04,
|
|
NVME_TCP_FES_R2T_LIMIT_EXCEEDED = 0x05,
|
|
NVME_TCP_FES_DATA_LIMIT_EXCEEDED = 0x05,
|
|
NVME_TCP_FES_UNSUPPORTED_PARAM = 0x06,
|
|
};
|
|
|
|
enum nvme_tcp_digest_option {
|
|
NVME_TCP_HDR_DIGEST_ENABLE = (1 << 0),
|
|
NVME_TCP_DATA_DIGEST_ENABLE = (1 << 1),
|
|
};
|
|
|
|
enum nvme_tcp_pdu_type {
|
|
nvme_tcp_icreq = 0x0,
|
|
nvme_tcp_icresp = 0x1,
|
|
nvme_tcp_h2c_term = 0x2,
|
|
nvme_tcp_c2h_term = 0x3,
|
|
nvme_tcp_cmd = 0x4,
|
|
nvme_tcp_rsp = 0x5,
|
|
nvme_tcp_h2c_data = 0x6,
|
|
nvme_tcp_c2h_data = 0x7,
|
|
nvme_tcp_r2t = 0x9,
|
|
};
|
|
|
|
enum nvme_tcp_pdu_flags {
|
|
NVME_TCP_F_HDGST = (1 << 0),
|
|
NVME_TCP_F_DDGST = (1 << 1),
|
|
NVME_TCP_F_DATA_LAST = (1 << 2),
|
|
NVME_TCP_F_DATA_SUCCESS = (1 << 3),
|
|
};
|
|
|
|
/**
|
|
* struct nvme_tcp_hdr - nvme tcp pdu common header
|
|
*
|
|
* @type: pdu type
|
|
* @flags: pdu specific flags
|
|
* @hlen: pdu header length
|
|
* @pdo: pdu data offset
|
|
* @plen: pdu wire byte length
|
|
*/
|
|
struct nvme_tcp_hdr {
|
|
__u8 type;
|
|
__u8 flags;
|
|
__u8 hlen;
|
|
__u8 pdo;
|
|
__le32 plen;
|
|
};
|
|
|
|
/**
|
|
* struct nvme_tcp_icreq_pdu - nvme tcp initialize connection request pdu
|
|
*
|
|
* @hdr: pdu generic header
|
|
* @pfv: pdu version format
|
|
* @hpda: host pdu data alignment (dwords, 0's based)
|
|
* @digest: digest types enabled
|
|
* @maxr2t: maximum r2ts per request supported
|
|
*/
|
|
struct nvme_tcp_icreq_pdu {
|
|
struct nvme_tcp_hdr hdr;
|
|
__le16 pfv;
|
|
__u8 hpda;
|
|
__u8 digest;
|
|
__le32 maxr2t;
|
|
__u8 rsvd2[112];
|
|
};
|
|
|
|
/**
|
|
* struct nvme_tcp_icresp_pdu - nvme tcp initialize connection response pdu
|
|
*
|
|
* @hdr: pdu common header
|
|
* @pfv: pdu version format
|
|
* @cpda: controller pdu data alignment (dowrds, 0's based)
|
|
* @digest: digest types enabled
|
|
* @maxdata: maximum data capsules per r2t supported
|
|
*/
|
|
struct nvme_tcp_icresp_pdu {
|
|
struct nvme_tcp_hdr hdr;
|
|
__le16 pfv;
|
|
__u8 cpda;
|
|
__u8 digest;
|
|
__le32 maxdata;
|
|
__u8 rsvd[112];
|
|
};
|
|
|
|
/**
|
|
* struct nvme_tcp_term_pdu - nvme tcp terminate connection pdu
|
|
*
|
|
* @hdr: pdu common header
|
|
* @fes: fatal error status
|
|
* @fei: fatal error information
|
|
*/
|
|
struct nvme_tcp_term_pdu {
|
|
struct nvme_tcp_hdr hdr;
|
|
__le16 fes;
|
|
__le16 feil;
|
|
__le16 feiu;
|
|
__u8 rsvd[10];
|
|
};
|
|
|
|
/**
|
|
* struct nvme_tcp_cmd_pdu - nvme tcp command capsule pdu
|
|
*
|
|
* @hdr: pdu common header
|
|
* @cmd: nvme command
|
|
*/
|
|
struct nvme_tcp_cmd_pdu {
|
|
struct nvme_tcp_hdr hdr;
|
|
struct nvme_command cmd;
|
|
};
|
|
|
|
/**
|
|
* struct nvme_tcp_rsp_pdu - nvme tcp response capsule pdu
|
|
*
|
|
* @hdr: pdu common header
|
|
* @hdr: nvme-tcp generic header
|
|
* @cqe: nvme completion queue entry
|
|
*/
|
|
struct nvme_tcp_rsp_pdu {
|
|
struct nvme_tcp_hdr hdr;
|
|
struct nvme_completion cqe;
|
|
};
|
|
|
|
/**
|
|
* struct nvme_tcp_r2t_pdu - nvme tcp ready-to-transfer pdu
|
|
*
|
|
* @hdr: pdu common header
|
|
* @command_id: nvme command identifier which this relates to
|
|
* @ttag: transfer tag (controller generated)
|
|
* @r2t_offset: offset from the start of the command data
|
|
* @r2t_length: length the host is allowed to send
|
|
*/
|
|
struct nvme_tcp_r2t_pdu {
|
|
struct nvme_tcp_hdr hdr;
|
|
__u16 command_id;
|
|
__u16 ttag;
|
|
__le32 r2t_offset;
|
|
__le32 r2t_length;
|
|
__u8 rsvd[4];
|
|
};
|
|
|
|
/**
|
|
* struct nvme_tcp_data_pdu - nvme tcp data pdu
|
|
*
|
|
* @hdr: pdu common header
|
|
* @command_id: nvme command identifier which this relates to
|
|
* @ttag: transfer tag (controller generated)
|
|
* @data_offset: offset from the start of the command data
|
|
* @data_length: length of the data stream
|
|
*/
|
|
struct nvme_tcp_data_pdu {
|
|
struct nvme_tcp_hdr hdr;
|
|
__u16 command_id;
|
|
__u16 ttag;
|
|
__le32 data_offset;
|
|
__le32 data_length;
|
|
__u8 rsvd[4];
|
|
};
|
|
|
|
union nvme_tcp_pdu {
|
|
struct nvme_tcp_icreq_pdu icreq;
|
|
struct nvme_tcp_icresp_pdu icresp;
|
|
struct nvme_tcp_cmd_pdu cmd;
|
|
struct nvme_tcp_rsp_pdu rsp;
|
|
struct nvme_tcp_r2t_pdu r2t;
|
|
struct nvme_tcp_data_pdu data;
|
|
};
|
|
|
|
#endif /* _LINUX_NVME_TCP_H */
|