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usr
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src
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linux-headers-6.8.0-36
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include
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linux
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nvme-tcp.h
/* 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_tls_cipher { NVME_TCP_TLS_CIPHER_INVALID = 0, NVME_TCP_TLS_CIPHER_SHA256 = 1, NVME_TCP_TLS_CIPHER_SHA384 = 2, }; 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 */
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