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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 two7 * licenses. You may choose to be licensed under the terms of the GNU8 * General Public License (GPL) Version 2, available from the file9 * COPYING in the main directory of this source tree, or the10 * OpenIB.org BSD license below:11 *12 * Redistribution and use in source and binary forms, with or13 * without modification, are permitted provided that the following14 * conditions are met:15 *16 * - Redistributions of source code must retain the above17 * copyright notice, this list of conditions and the following18 * disclaimer.19 *20 * - Redistributions in binary form must reproduce the above21 * copyright notice, this list of conditions and the following22 * disclaimer in the documentation and/or other materials23 * 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 OF27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE32 * SOFTWARE.33 */34 35#ifndef __CXGB4_TC_U32_PARSE_H36#define __CXGB4_TC_U32_PARSE_H37 38struct 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 */45static 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 54static 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 76static 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 85static 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 94static 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 103static 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 */113static 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 122static 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 131static 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 140static 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 149static 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 158static 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 167static 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 176static 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 185static 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 194static 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 203static 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 */218static 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 229static const struct cxgb4_match_field cxgb4_tcp_fields[] = {230 { .off = 0, .val = cxgb4_fill_l4_ports },231 { .val = NULL }232};233 234static const struct cxgb4_match_field cxgb4_udp_fields[] = {235 { .off = 0, .val = cxgb4_fill_l4_ports },236 { .val = NULL }237};238 239struct cxgb4_next_header {240 /* Offset, shift, and mask added to beginning of the header241 * to get to next header. Useful when using a header242 * field's value to jump to next header such as IHL field243 * 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 in252 * IPv4 header.253 */254static 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 header289 * to get to transport layer header.290 */291static 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 325struct 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 332struct 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