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, __be32 val, __be32 mask); 42 }; 43 44 /* IPv4 match fields */ 45 static inline int cxgb4_fill_ipv4_tos(struct ch_filter_specification *f, 46 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 __be32 val, __be32 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 /* Offset, shift, and mask added to beginning of the header 241 * to get to next header. Useful when using a header 242 * field's value to jump to next header such as IHL field 243 * in IPv4 header. 244 */ 245 struct tc_u32_sel_hdr sel; 246 struct tc_u32_key key; 247 /* location of jump to make */ 248 const struct cxgb4_match_field *jump; 249 }; 250 251 /* Accept a rule with a jump to transport layer header based on IHL field in 252 * IPv4 header. 253 */ 254 static const struct cxgb4_next_header cxgb4_ipv4_jumps[] = { 255 { 256 /* TCP Jump */ 257 .sel = { 258 .off = 0, 259 .offoff = 0, 260 .offshift = 6, 261 .offmask = cpu_to_be16(0x0f00), 262 }, 263 .key = { 264 .off = 8, 265 .val = cpu_to_be32(0x00060000), 266 .mask = cpu_to_be32(0x00ff0000), 267 }, 268 .jump = cxgb4_tcp_fields, 269 }, 270 { 271 /* UDP Jump */ 272 .sel = { 273 .off = 0, 274 .offoff = 0, 275 .offshift = 6, 276 .offmask = cpu_to_be16(0x0f00), 277 }, 278 .key = { 279 .off = 8, 280 .val = cpu_to_be32(0x00110000), 281 .mask = cpu_to_be32(0x00ff0000), 282 }, 283 .jump = cxgb4_udp_fields, 284 }, 285 { .jump = NULL }, 286 }; 287 288 /* Accept a rule with a jump directly past the 40 Bytes of IPv6 fixed header 289 * to get to transport layer header. 290 */ 291 static const struct cxgb4_next_header cxgb4_ipv6_jumps[] = { 292 { 293 /* TCP Jump */ 294 .sel = { 295 .off = 40, 296 .offoff = 0, 297 .offshift = 0, 298 .offmask = 0, 299 }, 300 .key = { 301 .off = 4, 302 .val = cpu_to_be32(0x00000600), 303 .mask = cpu_to_be32(0x0000ff00), 304 }, 305 .jump = cxgb4_tcp_fields, 306 }, 307 { 308 /* UDP Jump */ 309 .sel = { 310 .off = 40, 311 .offoff = 0, 312 .offshift = 0, 313 .offmask = 0, 314 }, 315 .key = { 316 .off = 4, 317 .val = cpu_to_be32(0x00001100), 318 .mask = cpu_to_be32(0x0000ff00), 319 }, 320 .jump = cxgb4_udp_fields, 321 }, 322 { .jump = NULL }, 323 }; 324 325 struct cxgb4_link { 326 const struct cxgb4_match_field *match_field; /* Next header */ 327 struct ch_filter_specification fs; /* Match spec associated with link */ 328 u32 link_handle; /* Knode handle associated with the link */ 329 unsigned long *tid_map; /* Bitmap for filter tids */ 330 }; 331 332 struct cxgb4_tc_u32_table { 333 unsigned int size; /* number of entries in table */ 334 struct cxgb4_link table[] __counted_by(size); /* Jump table */ 335 }; 336 #endif /* __CXGB4_TC_U32_PARSE_H */ 337