1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* 2 /*
3 * NVMe over Fabrics TCP protocol header. 3 * NVMe over Fabrics TCP protocol header.
4 * Copyright (c) 2018 Lightbits Labs. All righ 4 * Copyright (c) 2018 Lightbits Labs. All rights reserved.
5 */ 5 */
6 6
7 #ifndef _LINUX_NVME_TCP_H 7 #ifndef _LINUX_NVME_TCP_H
8 #define _LINUX_NVME_TCP_H 8 #define _LINUX_NVME_TCP_H
9 9
10 #include <linux/nvme.h> 10 #include <linux/nvme.h>
11 11
12 #define NVME_TCP_DISC_PORT 8009 12 #define NVME_TCP_DISC_PORT 8009
13 #define NVME_TCP_ADMIN_CCSZ SZ_8K 13 #define NVME_TCP_ADMIN_CCSZ SZ_8K
14 #define NVME_TCP_DIGEST_LENGTH 4 14 #define NVME_TCP_DIGEST_LENGTH 4
15 #define NVME_TCP_MIN_MAXH2CDATA 4096 <<
16 15
17 enum nvme_tcp_pfv { 16 enum nvme_tcp_pfv {
18 NVME_TCP_PFV_1_0 = 0x0, 17 NVME_TCP_PFV_1_0 = 0x0,
19 }; 18 };
20 19
21 enum nvme_tcp_tls_cipher { <<
22 NVME_TCP_TLS_CIPHER_INVALID = 0, <<
23 NVME_TCP_TLS_CIPHER_SHA256 = 1, <<
24 NVME_TCP_TLS_CIPHER_SHA384 = 2, <<
25 }; <<
26 <<
27 enum nvme_tcp_fatal_error_status { 20 enum nvme_tcp_fatal_error_status {
28 NVME_TCP_FES_INVALID_PDU_HDR 21 NVME_TCP_FES_INVALID_PDU_HDR = 0x01,
29 NVME_TCP_FES_PDU_SEQ_ERR 22 NVME_TCP_FES_PDU_SEQ_ERR = 0x02,
30 NVME_TCP_FES_HDR_DIGEST_ERR 23 NVME_TCP_FES_HDR_DIGEST_ERR = 0x03,
31 NVME_TCP_FES_DATA_OUT_OF_RANGE 24 NVME_TCP_FES_DATA_OUT_OF_RANGE = 0x04,
32 NVME_TCP_FES_R2T_LIMIT_EXCEEDED 25 NVME_TCP_FES_R2T_LIMIT_EXCEEDED = 0x05,
33 NVME_TCP_FES_DATA_LIMIT_EXCEEDED 26 NVME_TCP_FES_DATA_LIMIT_EXCEEDED = 0x05,
34 NVME_TCP_FES_UNSUPPORTED_PARAM 27 NVME_TCP_FES_UNSUPPORTED_PARAM = 0x06,
35 }; 28 };
36 29
37 enum nvme_tcp_digest_option { 30 enum nvme_tcp_digest_option {
38 NVME_TCP_HDR_DIGEST_ENABLE = (1 < 31 NVME_TCP_HDR_DIGEST_ENABLE = (1 << 0),
39 NVME_TCP_DATA_DIGEST_ENABLE = (1 < 32 NVME_TCP_DATA_DIGEST_ENABLE = (1 << 1),
40 }; 33 };
41 34
42 enum nvme_tcp_pdu_type { 35 enum nvme_tcp_pdu_type {
43 nvme_tcp_icreq = 0x0, 36 nvme_tcp_icreq = 0x0,
44 nvme_tcp_icresp = 0x1, 37 nvme_tcp_icresp = 0x1,
45 nvme_tcp_h2c_term = 0x2, 38 nvme_tcp_h2c_term = 0x2,
46 nvme_tcp_c2h_term = 0x3, 39 nvme_tcp_c2h_term = 0x3,
47 nvme_tcp_cmd = 0x4, 40 nvme_tcp_cmd = 0x4,
48 nvme_tcp_rsp = 0x5, 41 nvme_tcp_rsp = 0x5,
49 nvme_tcp_h2c_data = 0x6, 42 nvme_tcp_h2c_data = 0x6,
50 nvme_tcp_c2h_data = 0x7, 43 nvme_tcp_c2h_data = 0x7,
51 nvme_tcp_r2t = 0x9, 44 nvme_tcp_r2t = 0x9,
52 }; 45 };
53 46
54 enum nvme_tcp_pdu_flags { 47 enum nvme_tcp_pdu_flags {
55 NVME_TCP_F_HDGST = (1 < 48 NVME_TCP_F_HDGST = (1 << 0),
56 NVME_TCP_F_DDGST = (1 < 49 NVME_TCP_F_DDGST = (1 << 1),
57 NVME_TCP_F_DATA_LAST = (1 < 50 NVME_TCP_F_DATA_LAST = (1 << 2),
58 NVME_TCP_F_DATA_SUCCESS = (1 < 51 NVME_TCP_F_DATA_SUCCESS = (1 << 3),
59 }; 52 };
60 53
61 /** 54 /**
62 * struct nvme_tcp_hdr - nvme tcp pdu common h 55 * struct nvme_tcp_hdr - nvme tcp pdu common header
63 * 56 *
64 * @type: pdu type 57 * @type: pdu type
65 * @flags: pdu specific flags 58 * @flags: pdu specific flags
66 * @hlen: pdu header length 59 * @hlen: pdu header length
67 * @pdo: pdu data offset 60 * @pdo: pdu data offset
68 * @plen: pdu wire byte length 61 * @plen: pdu wire byte length
69 */ 62 */
70 struct nvme_tcp_hdr { 63 struct nvme_tcp_hdr {
71 __u8 type; 64 __u8 type;
72 __u8 flags; 65 __u8 flags;
73 __u8 hlen; 66 __u8 hlen;
74 __u8 pdo; 67 __u8 pdo;
75 __le32 plen; 68 __le32 plen;
76 }; 69 };
77 70
78 /** 71 /**
79 * struct nvme_tcp_icreq_pdu - nvme tcp initia 72 * struct nvme_tcp_icreq_pdu - nvme tcp initialize connection request pdu
80 * 73 *
81 * @hdr: pdu generic header 74 * @hdr: pdu generic header
82 * @pfv: pdu version format 75 * @pfv: pdu version format
83 * @hpda: host pdu data alignment (dw 76 * @hpda: host pdu data alignment (dwords, 0's based)
84 * @digest: digest types enabled 77 * @digest: digest types enabled
85 * @maxr2t: maximum r2ts per request su 78 * @maxr2t: maximum r2ts per request supported
86 */ 79 */
87 struct nvme_tcp_icreq_pdu { 80 struct nvme_tcp_icreq_pdu {
88 struct nvme_tcp_hdr hdr; 81 struct nvme_tcp_hdr hdr;
89 __le16 pfv; 82 __le16 pfv;
90 __u8 hpda; 83 __u8 hpda;
91 __u8 digest; 84 __u8 digest;
92 __le32 maxr2t; 85 __le32 maxr2t;
93 __u8 rsvd2[112]; 86 __u8 rsvd2[112];
94 }; 87 };
95 88
96 /** 89 /**
97 * struct nvme_tcp_icresp_pdu - nvme tcp initi 90 * struct nvme_tcp_icresp_pdu - nvme tcp initialize connection response pdu
98 * 91 *
99 * @hdr: pdu common header 92 * @hdr: pdu common header
100 * @pfv: pdu version format 93 * @pfv: pdu version format
101 * @cpda: controller pdu data alignme 94 * @cpda: controller pdu data alignment (dowrds, 0's based)
102 * @digest: digest types enabled 95 * @digest: digest types enabled
103 * @maxdata: maximum data capsules per r 96 * @maxdata: maximum data capsules per r2t supported
104 */ 97 */
105 struct nvme_tcp_icresp_pdu { 98 struct nvme_tcp_icresp_pdu {
106 struct nvme_tcp_hdr hdr; 99 struct nvme_tcp_hdr hdr;
107 __le16 pfv; 100 __le16 pfv;
108 __u8 cpda; 101 __u8 cpda;
109 __u8 digest; 102 __u8 digest;
110 __le32 maxdata; 103 __le32 maxdata;
111 __u8 rsvd[112]; 104 __u8 rsvd[112];
112 }; 105 };
113 106
114 /** 107 /**
115 * struct nvme_tcp_term_pdu - nvme tcp termina 108 * struct nvme_tcp_term_pdu - nvme tcp terminate connection pdu
116 * 109 *
117 * @hdr: pdu common header 110 * @hdr: pdu common header
118 * @fes: fatal error status 111 * @fes: fatal error status
119 * @fei: fatal error information 112 * @fei: fatal error information
120 */ 113 */
121 struct nvme_tcp_term_pdu { 114 struct nvme_tcp_term_pdu {
122 struct nvme_tcp_hdr hdr; 115 struct nvme_tcp_hdr hdr;
123 __le16 fes; 116 __le16 fes;
124 __le16 feil; !! 117 __le32 fei;
125 __le16 feiu; !! 118 __u8 rsvd[8];
126 __u8 rsvd[10]; <<
127 }; 119 };
128 120
129 /** 121 /**
130 * struct nvme_tcp_cmd_pdu - nvme tcp command 122 * struct nvme_tcp_cmd_pdu - nvme tcp command capsule pdu
131 * 123 *
132 * @hdr: pdu common header 124 * @hdr: pdu common header
133 * @cmd: nvme command 125 * @cmd: nvme command
134 */ 126 */
135 struct nvme_tcp_cmd_pdu { 127 struct nvme_tcp_cmd_pdu {
136 struct nvme_tcp_hdr hdr; 128 struct nvme_tcp_hdr hdr;
137 struct nvme_command cmd; 129 struct nvme_command cmd;
138 }; 130 };
139 131
140 /** 132 /**
141 * struct nvme_tcp_rsp_pdu - nvme tcp response 133 * struct nvme_tcp_rsp_pdu - nvme tcp response capsule pdu
142 * 134 *
143 * @hdr: pdu common header 135 * @hdr: pdu common header
144 * @hdr: nvme-tcp generic header 136 * @hdr: nvme-tcp generic header
145 * @cqe: nvme completion queue entry 137 * @cqe: nvme completion queue entry
146 */ 138 */
147 struct nvme_tcp_rsp_pdu { 139 struct nvme_tcp_rsp_pdu {
148 struct nvme_tcp_hdr hdr; 140 struct nvme_tcp_hdr hdr;
149 struct nvme_completion cqe; 141 struct nvme_completion cqe;
150 }; 142 };
151 143
152 /** 144 /**
153 * struct nvme_tcp_r2t_pdu - nvme tcp ready-to 145 * struct nvme_tcp_r2t_pdu - nvme tcp ready-to-transfer pdu
154 * 146 *
155 * @hdr: pdu common header 147 * @hdr: pdu common header
156 * @command_id: nvme command identifier whi 148 * @command_id: nvme command identifier which this relates to
157 * @ttag: transfer tag (controller ge 149 * @ttag: transfer tag (controller generated)
158 * @r2t_offset: offset from the start of th 150 * @r2t_offset: offset from the start of the command data
159 * @r2t_length: length the host is allowed 151 * @r2t_length: length the host is allowed to send
160 */ 152 */
161 struct nvme_tcp_r2t_pdu { 153 struct nvme_tcp_r2t_pdu {
162 struct nvme_tcp_hdr hdr; 154 struct nvme_tcp_hdr hdr;
163 __u16 command_id; 155 __u16 command_id;
164 __u16 ttag; 156 __u16 ttag;
165 __le32 r2t_offset; 157 __le32 r2t_offset;
166 __le32 r2t_length; 158 __le32 r2t_length;
167 __u8 rsvd[4]; 159 __u8 rsvd[4];
168 }; 160 };
169 161
170 /** 162 /**
171 * struct nvme_tcp_data_pdu - nvme tcp data pd 163 * struct nvme_tcp_data_pdu - nvme tcp data pdu
172 * 164 *
173 * @hdr: pdu common header 165 * @hdr: pdu common header
174 * @command_id: nvme command identifier whi 166 * @command_id: nvme command identifier which this relates to
175 * @ttag: transfer tag (controller ge 167 * @ttag: transfer tag (controller generated)
176 * @data_offset: offset from the start of th 168 * @data_offset: offset from the start of the command data
177 * @data_length: length of the data stream 169 * @data_length: length of the data stream
178 */ 170 */
179 struct nvme_tcp_data_pdu { 171 struct nvme_tcp_data_pdu {
180 struct nvme_tcp_hdr hdr; 172 struct nvme_tcp_hdr hdr;
181 __u16 command_id; 173 __u16 command_id;
182 __u16 ttag; 174 __u16 ttag;
183 __le32 data_offset; 175 __le32 data_offset;
184 __le32 data_length; 176 __le32 data_length;
185 __u8 rsvd[4]; 177 __u8 rsvd[4];
186 }; 178 };
187 179
188 union nvme_tcp_pdu { 180 union nvme_tcp_pdu {
189 struct nvme_tcp_icreq_pdu icreq; 181 struct nvme_tcp_icreq_pdu icreq;
190 struct nvme_tcp_icresp_pdu icresp 182 struct nvme_tcp_icresp_pdu icresp;
191 struct nvme_tcp_cmd_pdu cmd; 183 struct nvme_tcp_cmd_pdu cmd;
192 struct nvme_tcp_rsp_pdu rsp; 184 struct nvme_tcp_rsp_pdu rsp;
193 struct nvme_tcp_r2t_pdu r2t; 185 struct nvme_tcp_r2t_pdu r2t;
194 struct nvme_tcp_data_pdu data; 186 struct nvme_tcp_data_pdu data;
195 }; 187 };
196 188
197 #endif /* _LINUX_NVME_TCP_H */ 189 #endif /* _LINUX_NVME_TCP_H */
198 190
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