Rahul Lakkireddy | 2e8aad7 | 2016-09-20 17:13:08 +0530 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the Chelsio T4 Ethernet driver for Linux. |
| 3 | * |
| 4 | * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved. |
| 5 | * |
| 6 | * This software is available to you under a choice of one of two |
| 7 | * licenses. You may choose to be licensed under the terms of the GNU |
| 8 | * General Public License (GPL) Version 2, available from the file |
| 9 | * COPYING in the main directory of this source tree, or the |
| 10 | * OpenIB.org BSD license below: |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or |
| 13 | * without modification, are permitted provided that the following |
| 14 | * conditions are met: |
| 15 | * |
| 16 | * - Redistributions of source code must retain the above |
| 17 | * copyright notice, this list of conditions and the following |
| 18 | * disclaimer. |
| 19 | * |
| 20 | * - Redistributions in binary form must reproduce the above |
| 21 | * copyright notice, this list of conditions and the following |
| 22 | * disclaimer in the documentation and/or other materials |
| 23 | * provided with the distribution. |
| 24 | * |
| 25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 32 | * SOFTWARE. |
| 33 | */ |
| 34 | |
| 35 | #ifndef __CXGB4_TC_U32_PARSE_H |
| 36 | #define __CXGB4_TC_U32_PARSE_H |
| 37 | |
| 38 | struct cxgb4_match_field { |
| 39 | int off; /* Offset from the beginning of the header to match */ |
| 40 | /* Fill the value/mask pair in the spec if matched */ |
| 41 | int (*val)(struct ch_filter_specification *f, u32 val, u32 mask); |
| 42 | }; |
| 43 | |
| 44 | /* IPv4 match fields */ |
| 45 | static inline int cxgb4_fill_ipv4_tos(struct ch_filter_specification *f, |
| 46 | u32 val, u32 mask) |
| 47 | { |
| 48 | f->val.tos = (ntohl(val) >> 16) & 0x000000FF; |
| 49 | f->mask.tos = (ntohl(mask) >> 16) & 0x000000FF; |
| 50 | |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | static inline int cxgb4_fill_ipv4_frag(struct ch_filter_specification *f, |
| 55 | u32 val, u32 mask) |
| 56 | { |
| 57 | u32 mask_val; |
| 58 | u8 frag_val; |
| 59 | |
| 60 | frag_val = (ntohl(val) >> 13) & 0x00000007; |
| 61 | mask_val = ntohl(mask) & 0x0000FFFF; |
| 62 | |
| 63 | if (frag_val == 0x1 && mask_val != 0x3FFF) { /* MF set */ |
| 64 | f->val.frag = 1; |
| 65 | f->mask.frag = 1; |
| 66 | } else if (frag_val == 0x2 && mask_val != 0x3FFF) { /* DF set */ |
| 67 | f->val.frag = 0; |
| 68 | f->mask.frag = 1; |
| 69 | } else { |
| 70 | return -EINVAL; |
| 71 | } |
| 72 | |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | static inline int cxgb4_fill_ipv4_proto(struct ch_filter_specification *f, |
| 77 | u32 val, u32 mask) |
| 78 | { |
| 79 | f->val.proto = (ntohl(val) >> 16) & 0x000000FF; |
| 80 | f->mask.proto = (ntohl(mask) >> 16) & 0x000000FF; |
| 81 | |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | static inline int cxgb4_fill_ipv4_src_ip(struct ch_filter_specification *f, |
| 86 | u32 val, u32 mask) |
| 87 | { |
| 88 | memcpy(&f->val.fip[0], &val, sizeof(u32)); |
| 89 | memcpy(&f->mask.fip[0], &mask, sizeof(u32)); |
| 90 | |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | static inline int cxgb4_fill_ipv4_dst_ip(struct ch_filter_specification *f, |
| 95 | u32 val, u32 mask) |
| 96 | { |
| 97 | memcpy(&f->val.lip[0], &val, sizeof(u32)); |
| 98 | memcpy(&f->mask.lip[0], &mask, sizeof(u32)); |
| 99 | |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static const struct cxgb4_match_field cxgb4_ipv4_fields[] = { |
| 104 | { .off = 0, .val = cxgb4_fill_ipv4_tos }, |
| 105 | { .off = 4, .val = cxgb4_fill_ipv4_frag }, |
| 106 | { .off = 8, .val = cxgb4_fill_ipv4_proto }, |
| 107 | { .off = 12, .val = cxgb4_fill_ipv4_src_ip }, |
| 108 | { .off = 16, .val = cxgb4_fill_ipv4_dst_ip }, |
| 109 | { .val = NULL } |
| 110 | }; |
| 111 | |
| 112 | /* IPv6 match fields */ |
| 113 | static inline int cxgb4_fill_ipv6_tos(struct ch_filter_specification *f, |
| 114 | u32 val, u32 mask) |
| 115 | { |
| 116 | f->val.tos = (ntohl(val) >> 20) & 0x000000FF; |
| 117 | f->mask.tos = (ntohl(mask) >> 20) & 0x000000FF; |
| 118 | |
| 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | static inline int cxgb4_fill_ipv6_proto(struct ch_filter_specification *f, |
| 123 | u32 val, u32 mask) |
| 124 | { |
| 125 | f->val.proto = (ntohl(val) >> 8) & 0x000000FF; |
| 126 | f->mask.proto = (ntohl(mask) >> 8) & 0x000000FF; |
| 127 | |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static inline int cxgb4_fill_ipv6_src_ip0(struct ch_filter_specification *f, |
| 132 | u32 val, u32 mask) |
| 133 | { |
| 134 | memcpy(&f->val.fip[0], &val, sizeof(u32)); |
| 135 | memcpy(&f->mask.fip[0], &mask, sizeof(u32)); |
| 136 | |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | static inline int cxgb4_fill_ipv6_src_ip1(struct ch_filter_specification *f, |
| 141 | u32 val, u32 mask) |
| 142 | { |
| 143 | memcpy(&f->val.fip[4], &val, sizeof(u32)); |
| 144 | memcpy(&f->mask.fip[4], &mask, sizeof(u32)); |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static inline int cxgb4_fill_ipv6_src_ip2(struct ch_filter_specification *f, |
| 150 | u32 val, u32 mask) |
| 151 | { |
| 152 | memcpy(&f->val.fip[8], &val, sizeof(u32)); |
| 153 | memcpy(&f->mask.fip[8], &mask, sizeof(u32)); |
| 154 | |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | static inline int cxgb4_fill_ipv6_src_ip3(struct ch_filter_specification *f, |
| 159 | u32 val, u32 mask) |
| 160 | { |
| 161 | memcpy(&f->val.fip[12], &val, sizeof(u32)); |
| 162 | memcpy(&f->mask.fip[12], &mask, sizeof(u32)); |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | static inline int cxgb4_fill_ipv6_dst_ip0(struct ch_filter_specification *f, |
| 168 | u32 val, u32 mask) |
| 169 | { |
| 170 | memcpy(&f->val.lip[0], &val, sizeof(u32)); |
| 171 | memcpy(&f->mask.lip[0], &mask, sizeof(u32)); |
| 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | static inline int cxgb4_fill_ipv6_dst_ip1(struct ch_filter_specification *f, |
| 177 | u32 val, u32 mask) |
| 178 | { |
| 179 | memcpy(&f->val.lip[4], &val, sizeof(u32)); |
| 180 | memcpy(&f->mask.lip[4], &mask, sizeof(u32)); |
| 181 | |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | static inline int cxgb4_fill_ipv6_dst_ip2(struct ch_filter_specification *f, |
| 186 | u32 val, u32 mask) |
| 187 | { |
| 188 | memcpy(&f->val.lip[8], &val, sizeof(u32)); |
| 189 | memcpy(&f->mask.lip[8], &mask, sizeof(u32)); |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | static inline int cxgb4_fill_ipv6_dst_ip3(struct ch_filter_specification *f, |
| 195 | u32 val, u32 mask) |
| 196 | { |
| 197 | memcpy(&f->val.lip[12], &val, sizeof(u32)); |
| 198 | memcpy(&f->mask.lip[12], &mask, sizeof(u32)); |
| 199 | |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | static const struct cxgb4_match_field cxgb4_ipv6_fields[] = { |
| 204 | { .off = 0, .val = cxgb4_fill_ipv6_tos }, |
| 205 | { .off = 4, .val = cxgb4_fill_ipv6_proto }, |
| 206 | { .off = 8, .val = cxgb4_fill_ipv6_src_ip0 }, |
| 207 | { .off = 12, .val = cxgb4_fill_ipv6_src_ip1 }, |
| 208 | { .off = 16, .val = cxgb4_fill_ipv6_src_ip2 }, |
| 209 | { .off = 20, .val = cxgb4_fill_ipv6_src_ip3 }, |
| 210 | { .off = 24, .val = cxgb4_fill_ipv6_dst_ip0 }, |
| 211 | { .off = 28, .val = cxgb4_fill_ipv6_dst_ip1 }, |
| 212 | { .off = 32, .val = cxgb4_fill_ipv6_dst_ip2 }, |
| 213 | { .off = 36, .val = cxgb4_fill_ipv6_dst_ip3 }, |
| 214 | { .val = NULL } |
| 215 | }; |
| 216 | |
| 217 | /* TCP/UDP match */ |
| 218 | static inline int cxgb4_fill_l4_ports(struct ch_filter_specification *f, |
| 219 | u32 val, u32 mask) |
| 220 | { |
| 221 | f->val.fport = ntohl(val) >> 16; |
| 222 | f->mask.fport = ntohl(mask) >> 16; |
| 223 | f->val.lport = ntohl(val) & 0x0000FFFF; |
| 224 | f->mask.lport = ntohl(mask) & 0x0000FFFF; |
| 225 | |
| 226 | return 0; |
| 227 | }; |
| 228 | |
| 229 | static const struct cxgb4_match_field cxgb4_tcp_fields[] = { |
| 230 | { .off = 0, .val = cxgb4_fill_l4_ports }, |
| 231 | { .val = NULL } |
| 232 | }; |
| 233 | |
| 234 | static const struct cxgb4_match_field cxgb4_udp_fields[] = { |
| 235 | { .off = 0, .val = cxgb4_fill_l4_ports }, |
| 236 | { .val = NULL } |
| 237 | }; |
| 238 | |
| 239 | struct cxgb4_next_header { |
| 240 | unsigned int offset; /* Offset to next header */ |
| 241 | /* offset, shift, and mask added to offset above |
| 242 | * to get to next header. Useful when using a header |
| 243 | * field's value to jump to next header such as IHL field |
| 244 | * in IPv4 header. |
| 245 | */ |
| 246 | unsigned int offoff; |
| 247 | u32 shift; |
| 248 | u32 mask; |
| 249 | /* match criteria to make this jump */ |
| 250 | unsigned int match_off; |
| 251 | u32 match_val; |
| 252 | u32 match_mask; |
| 253 | /* location of jump to make */ |
| 254 | const struct cxgb4_match_field *jump; |
| 255 | }; |
| 256 | |
| 257 | /* Accept a rule with a jump to transport layer header based on IHL field in |
| 258 | * IPv4 header. |
| 259 | */ |
| 260 | static const struct cxgb4_next_header cxgb4_ipv4_jumps[] = { |
| 261 | { .offset = 0, .offoff = 0, .shift = 6, .mask = 0xF, |
| 262 | .match_off = 8, .match_val = 0x600, .match_mask = 0xFF00, |
| 263 | .jump = cxgb4_tcp_fields }, |
| 264 | { .offset = 0, .offoff = 0, .shift = 6, .mask = 0xF, |
| 265 | .match_off = 8, .match_val = 0x1100, .match_mask = 0xFF00, |
| 266 | .jump = cxgb4_udp_fields }, |
| 267 | { .jump = NULL } |
| 268 | }; |
| 269 | |
| 270 | /* Accept a rule with a jump directly past the 40 Bytes of IPv6 fixed header |
| 271 | * to get to transport layer header. |
| 272 | */ |
| 273 | static const struct cxgb4_next_header cxgb4_ipv6_jumps[] = { |
| 274 | { .offset = 0x28, .offoff = 0, .shift = 0, .mask = 0, |
| 275 | .match_off = 4, .match_val = 0x60000, .match_mask = 0xFF0000, |
| 276 | .jump = cxgb4_tcp_fields }, |
| 277 | { .offset = 0x28, .offoff = 0, .shift = 0, .mask = 0, |
| 278 | .match_off = 4, .match_val = 0x110000, .match_mask = 0xFF0000, |
| 279 | .jump = cxgb4_udp_fields }, |
| 280 | { .jump = NULL } |
| 281 | }; |
Rahul Lakkireddy | d893184 | 2016-09-20 17:13:09 +0530 | [diff] [blame] | 282 | |
| 283 | struct cxgb4_link { |
| 284 | const struct cxgb4_match_field *match_field; /* Next header */ |
| 285 | struct ch_filter_specification fs; /* Match spec associated with link */ |
| 286 | u32 link_handle; /* Knode handle associated with the link */ |
| 287 | unsigned long *tid_map; /* Bitmap for filter tids */ |
| 288 | }; |
| 289 | |
| 290 | struct cxgb4_tc_u32_table { |
| 291 | unsigned int size; /* number of entries in table */ |
| 292 | struct cxgb4_link table[0]; /* Jump table */ |
| 293 | }; |
Rahul Lakkireddy | 2e8aad7 | 2016-09-20 17:13:08 +0530 | [diff] [blame] | 294 | #endif /* __CXGB4_TC_U32_PARSE_H */ |