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 }; 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 }; 294 #endif /* __CXGB4_TC_U32_PARSE_H */ 295