337 lines
8.8 KiB
C
337 lines
8.8 KiB
C
/*
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* This file is part of the Chelsio T4 Ethernet driver for Linux.
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*
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* Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __CXGB4_TC_U32_PARSE_H
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#define __CXGB4_TC_U32_PARSE_H
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struct cxgb4_match_field {
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int off; /* Offset from the beginning of the header to match */
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/* Fill the value/mask pair in the spec if matched */
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int (*val)(struct ch_filter_specification *f, __be32 val, __be32 mask);
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};
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/* IPv4 match fields */
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static inline int cxgb4_fill_ipv4_tos(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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f->val.tos = (ntohl(val) >> 16) & 0x000000FF;
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f->mask.tos = (ntohl(mask) >> 16) & 0x000000FF;
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return 0;
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}
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static inline int cxgb4_fill_ipv4_frag(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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u32 mask_val;
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u8 frag_val;
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frag_val = (ntohl(val) >> 13) & 0x00000007;
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mask_val = ntohl(mask) & 0x0000FFFF;
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if (frag_val == 0x1 && mask_val != 0x3FFF) { /* MF set */
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f->val.frag = 1;
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f->mask.frag = 1;
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} else if (frag_val == 0x2 && mask_val != 0x3FFF) { /* DF set */
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f->val.frag = 0;
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f->mask.frag = 1;
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} else {
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return -EINVAL;
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}
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return 0;
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}
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static inline int cxgb4_fill_ipv4_proto(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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f->val.proto = (ntohl(val) >> 16) & 0x000000FF;
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f->mask.proto = (ntohl(mask) >> 16) & 0x000000FF;
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return 0;
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}
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static inline int cxgb4_fill_ipv4_src_ip(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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memcpy(&f->val.fip[0], &val, sizeof(u32));
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memcpy(&f->mask.fip[0], &mask, sizeof(u32));
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return 0;
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}
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static inline int cxgb4_fill_ipv4_dst_ip(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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memcpy(&f->val.lip[0], &val, sizeof(u32));
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memcpy(&f->mask.lip[0], &mask, sizeof(u32));
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return 0;
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}
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static const struct cxgb4_match_field cxgb4_ipv4_fields[] = {
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{ .off = 0, .val = cxgb4_fill_ipv4_tos },
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{ .off = 4, .val = cxgb4_fill_ipv4_frag },
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{ .off = 8, .val = cxgb4_fill_ipv4_proto },
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{ .off = 12, .val = cxgb4_fill_ipv4_src_ip },
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{ .off = 16, .val = cxgb4_fill_ipv4_dst_ip },
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{ .val = NULL }
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};
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/* IPv6 match fields */
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static inline int cxgb4_fill_ipv6_tos(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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f->val.tos = (ntohl(val) >> 20) & 0x000000FF;
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f->mask.tos = (ntohl(mask) >> 20) & 0x000000FF;
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return 0;
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}
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static inline int cxgb4_fill_ipv6_proto(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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f->val.proto = (ntohl(val) >> 8) & 0x000000FF;
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f->mask.proto = (ntohl(mask) >> 8) & 0x000000FF;
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return 0;
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}
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static inline int cxgb4_fill_ipv6_src_ip0(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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memcpy(&f->val.fip[0], &val, sizeof(u32));
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memcpy(&f->mask.fip[0], &mask, sizeof(u32));
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return 0;
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}
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static inline int cxgb4_fill_ipv6_src_ip1(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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memcpy(&f->val.fip[4], &val, sizeof(u32));
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memcpy(&f->mask.fip[4], &mask, sizeof(u32));
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return 0;
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}
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static inline int cxgb4_fill_ipv6_src_ip2(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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memcpy(&f->val.fip[8], &val, sizeof(u32));
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memcpy(&f->mask.fip[8], &mask, sizeof(u32));
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return 0;
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}
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static inline int cxgb4_fill_ipv6_src_ip3(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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memcpy(&f->val.fip[12], &val, sizeof(u32));
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memcpy(&f->mask.fip[12], &mask, sizeof(u32));
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return 0;
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}
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static inline int cxgb4_fill_ipv6_dst_ip0(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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memcpy(&f->val.lip[0], &val, sizeof(u32));
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memcpy(&f->mask.lip[0], &mask, sizeof(u32));
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return 0;
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}
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static inline int cxgb4_fill_ipv6_dst_ip1(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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memcpy(&f->val.lip[4], &val, sizeof(u32));
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memcpy(&f->mask.lip[4], &mask, sizeof(u32));
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return 0;
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}
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static inline int cxgb4_fill_ipv6_dst_ip2(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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memcpy(&f->val.lip[8], &val, sizeof(u32));
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memcpy(&f->mask.lip[8], &mask, sizeof(u32));
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return 0;
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}
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static inline int cxgb4_fill_ipv6_dst_ip3(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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memcpy(&f->val.lip[12], &val, sizeof(u32));
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memcpy(&f->mask.lip[12], &mask, sizeof(u32));
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return 0;
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}
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static const struct cxgb4_match_field cxgb4_ipv6_fields[] = {
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{ .off = 0, .val = cxgb4_fill_ipv6_tos },
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{ .off = 4, .val = cxgb4_fill_ipv6_proto },
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{ .off = 8, .val = cxgb4_fill_ipv6_src_ip0 },
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{ .off = 12, .val = cxgb4_fill_ipv6_src_ip1 },
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{ .off = 16, .val = cxgb4_fill_ipv6_src_ip2 },
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{ .off = 20, .val = cxgb4_fill_ipv6_src_ip3 },
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{ .off = 24, .val = cxgb4_fill_ipv6_dst_ip0 },
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{ .off = 28, .val = cxgb4_fill_ipv6_dst_ip1 },
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{ .off = 32, .val = cxgb4_fill_ipv6_dst_ip2 },
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{ .off = 36, .val = cxgb4_fill_ipv6_dst_ip3 },
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{ .val = NULL }
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};
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/* TCP/UDP match */
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static inline int cxgb4_fill_l4_ports(struct ch_filter_specification *f,
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__be32 val, __be32 mask)
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{
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f->val.fport = ntohl(val) >> 16;
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f->mask.fport = ntohl(mask) >> 16;
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f->val.lport = ntohl(val) & 0x0000FFFF;
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f->mask.lport = ntohl(mask) & 0x0000FFFF;
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return 0;
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};
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static const struct cxgb4_match_field cxgb4_tcp_fields[] = {
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{ .off = 0, .val = cxgb4_fill_l4_ports },
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{ .val = NULL }
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};
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static const struct cxgb4_match_field cxgb4_udp_fields[] = {
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{ .off = 0, .val = cxgb4_fill_l4_ports },
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{ .val = NULL }
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};
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struct cxgb4_next_header {
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/* Offset, shift, and mask added to beginning of the header
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* to get to next header. Useful when using a header
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* field's value to jump to next header such as IHL field
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* in IPv4 header.
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*/
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struct tc_u32_sel_hdr sel;
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struct tc_u32_key key;
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/* location of jump to make */
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const struct cxgb4_match_field *jump;
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};
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/* Accept a rule with a jump to transport layer header based on IHL field in
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* IPv4 header.
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*/
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static const struct cxgb4_next_header cxgb4_ipv4_jumps[] = {
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{
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/* TCP Jump */
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.sel = {
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.off = 0,
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.offoff = 0,
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.offshift = 6,
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.offmask = cpu_to_be16(0x0f00),
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},
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.key = {
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.off = 8,
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.val = cpu_to_be32(0x00060000),
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.mask = cpu_to_be32(0x00ff0000),
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},
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.jump = cxgb4_tcp_fields,
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},
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{
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/* UDP Jump */
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.sel = {
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.off = 0,
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.offoff = 0,
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.offshift = 6,
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.offmask = cpu_to_be16(0x0f00),
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},
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.key = {
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.off = 8,
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.val = cpu_to_be32(0x00110000),
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.mask = cpu_to_be32(0x00ff0000),
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},
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.jump = cxgb4_udp_fields,
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},
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{ .jump = NULL },
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};
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/* Accept a rule with a jump directly past the 40 Bytes of IPv6 fixed header
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* to get to transport layer header.
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*/
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static const struct cxgb4_next_header cxgb4_ipv6_jumps[] = {
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{
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/* TCP Jump */
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.sel = {
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.off = 40,
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.offoff = 0,
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.offshift = 0,
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.offmask = 0,
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},
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.key = {
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.off = 4,
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.val = cpu_to_be32(0x00000600),
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.mask = cpu_to_be32(0x0000ff00),
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},
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.jump = cxgb4_tcp_fields,
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},
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{
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/* UDP Jump */
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.sel = {
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.off = 40,
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.offoff = 0,
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.offshift = 0,
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.offmask = 0,
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},
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.key = {
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.off = 4,
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.val = cpu_to_be32(0x00001100),
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.mask = cpu_to_be32(0x0000ff00),
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},
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.jump = cxgb4_udp_fields,
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},
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{ .jump = NULL },
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};
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struct cxgb4_link {
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const struct cxgb4_match_field *match_field; /* Next header */
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struct ch_filter_specification fs; /* Match spec associated with link */
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u32 link_handle; /* Knode handle associated with the link */
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unsigned long *tid_map; /* Bitmap for filter tids */
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};
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struct cxgb4_tc_u32_table {
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unsigned int size; /* number of entries in table */
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struct cxgb4_link table[] __counted_by(size); /* Jump table */
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};
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#endif /* __CXGB4_TC_U32_PARSE_H */
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