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Release 4.11 drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32_parse.h

/*
 * This file is part of the Chelsio T4 Ethernet driver for Linux.
 *
 * Copyright (c) 2016 Chelsio Communications, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef __CXGB4_TC_U32_PARSE_H

#define __CXGB4_TC_U32_PARSE_H


struct cxgb4_match_field {
	
int off; /* Offset from the beginning of the header to match */
	/* Fill the value/mask pair in the spec if matched */
	
int (*val)(struct ch_filter_specification *f, u32 val, u32 mask);
};

/* IPv4 match fields */

static inline int cxgb4_fill_ipv4_tos(struct ch_filter_specification *f, u32 val, u32 mask) { f->val.tos = (ntohl(val) >> 16) & 0x000000FF; f->mask.tos = (ntohl(mask) >> 16) & 0x000000FF; return 0; }

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static inline int cxgb4_fill_ipv4_frag(struct ch_filter_specification *f, u32 val, u32 mask) { u32 mask_val; u8 frag_val; frag_val = (ntohl(val) >> 13) & 0x00000007; mask_val = ntohl(mask) & 0x0000FFFF; if (frag_val == 0x1 && mask_val != 0x3FFF) { /* MF set */ f->val.frag = 1; f->mask.frag = 1; } else if (frag_val == 0x2 && mask_val != 0x3FFF) { /* DF set */ f->val.frag = 0; f->mask.frag = 1; } else { return -EINVAL; } return 0; }

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static inline int cxgb4_fill_ipv4_proto(struct ch_filter_specification *f, u32 val, u32 mask) { f->val.proto = (ntohl(val) >> 16) & 0x000000FF; f->mask.proto = (ntohl(mask) >> 16) & 0x000000FF; return 0; }

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static inline int cxgb4_fill_ipv4_src_ip(struct ch_filter_specification *f, u32 val, u32 mask) { memcpy(&f->val.fip[0], &val, sizeof(u32)); memcpy(&f->mask.fip[0], &mask, sizeof(u32)); return 0; }

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static inline int cxgb4_fill_ipv4_dst_ip(struct ch_filter_specification *f, u32 val, u32 mask) { memcpy(&f->val.lip[0], &val, sizeof(u32)); memcpy(&f->mask.lip[0], &mask, sizeof(u32)); return 0; }

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static const struct cxgb4_match_field cxgb4_ipv4_fields[] = { { .off = 0, .val = cxgb4_fill_ipv4_tos }, { .off = 4, .val = cxgb4_fill_ipv4_frag }, { .off = 8, .val = cxgb4_fill_ipv4_proto }, { .off = 12, .val = cxgb4_fill_ipv4_src_ip }, { .off = 16, .val = cxgb4_fill_ipv4_dst_ip }, { .val = NULL } }; /* IPv6 match fields */
static inline int cxgb4_fill_ipv6_tos(struct ch_filter_specification *f, u32 val, u32 mask) { f->val.tos = (ntohl(val) >> 20) & 0x000000FF; f->mask.tos = (ntohl(mask) >> 20) & 0x000000FF; return 0; }

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static inline int cxgb4_fill_ipv6_proto(struct ch_filter_specification *f, u32 val, u32 mask) { f->val.proto = (ntohl(val) >> 8) & 0x000000FF; f->mask.proto = (ntohl(mask) >> 8) & 0x000000FF; return 0; }

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static inline int cxgb4_fill_ipv6_src_ip0(struct ch_filter_specification *f, u32 val, u32 mask) { memcpy(&f->val.fip[0], &val, sizeof(u32)); memcpy(&f->mask.fip[0], &mask, sizeof(u32)); return 0; }

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static inline int cxgb4_fill_ipv6_src_ip1(struct ch_filter_specification *f, u32 val, u32 mask) { memcpy(&f->val.fip[4], &val, sizeof(u32)); memcpy(&f->mask.fip[4], &mask, sizeof(u32)); return 0; }

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static inline int cxgb4_fill_ipv6_src_ip2(struct ch_filter_specification *f, u32 val, u32 mask) { memcpy(&f->val.fip[8], &val, sizeof(u32)); memcpy(&f->mask.fip[8], &mask, sizeof(u32)); return 0; }

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static inline int cxgb4_fill_ipv6_src_ip3(struct ch_filter_specification *f, u32 val, u32 mask) { memcpy(&f->val.fip[12], &val, sizeof(u32)); memcpy(&f->mask.fip[12], &mask, sizeof(u32)); return 0; }

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static inline int cxgb4_fill_ipv6_dst_ip0(struct ch_filter_specification *f, u32 val, u32 mask) { memcpy(&f->val.lip[0], &val, sizeof(u32)); memcpy(&f->mask.lip[0], &mask, sizeof(u32)); return 0; }

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static inline int cxgb4_fill_ipv6_dst_ip1(struct ch_filter_specification *f, u32 val, u32 mask) { memcpy(&f->val.lip[4], &val, sizeof(u32)); memcpy(&f->mask.lip[4], &mask, sizeof(u32)); return 0; }

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static inline int cxgb4_fill_ipv6_dst_ip2(struct ch_filter_specification *f, u32 val, u32 mask) { memcpy(&f->val.lip[8], &val, sizeof(u32)); memcpy(&f->mask.lip[8], &mask, sizeof(u32)); return 0; }

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static inline int cxgb4_fill_ipv6_dst_ip3(struct ch_filter_specification *f, u32 val, u32 mask) { memcpy(&f->val.lip[12], &val, sizeof(u32)); memcpy(&f->mask.lip[12], &mask, sizeof(u32)); return 0; }

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static const struct cxgb4_match_field cxgb4_ipv6_fields[] = { { .off = 0, .val = cxgb4_fill_ipv6_tos }, { .off = 4, .val = cxgb4_fill_ipv6_proto }, { .off = 8, .val = cxgb4_fill_ipv6_src_ip0 }, { .off = 12, .val = cxgb4_fill_ipv6_src_ip1 }, { .off = 16, .val = cxgb4_fill_ipv6_src_ip2 }, { .off = 20, .val = cxgb4_fill_ipv6_src_ip3 }, { .off = 24, .val = cxgb4_fill_ipv6_dst_ip0 }, { .off = 28, .val = cxgb4_fill_ipv6_dst_ip1 }, { .off = 32, .val = cxgb4_fill_ipv6_dst_ip2 }, { .off = 36, .val = cxgb4_fill_ipv6_dst_ip3 }, { .val = NULL } }; /* TCP/UDP match */
static inline int cxgb4_fill_l4_ports(struct ch_filter_specification *f, u32 val, u32 mask) { f->val.fport = ntohl(val) >> 16; f->mask.fport = ntohl(mask) >> 16; f->val.lport = ntohl(val) & 0x0000FFFF; f->mask.lport = ntohl(mask) & 0x0000FFFF; return 0; }

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; static const struct cxgb4_match_field cxgb4_tcp_fields[] = { { .off = 0, .val = cxgb4_fill_l4_ports }, { .val = NULL } }; static const struct cxgb4_match_field cxgb4_udp_fields[] = { { .off = 0, .val = cxgb4_fill_l4_ports }, { .val = NULL } }; struct cxgb4_next_header { unsigned int offset; /* Offset to next header */ /* offset, shift, and mask added to offset above * to get to next header. Useful when using a header * field's value to jump to next header such as IHL field * in IPv4 header. */ unsigned int offoff; u32 shift; u32 mask; /* match criteria to make this jump */ unsigned int match_off; u32 match_val; u32 match_mask; /* location of jump to make */ const struct cxgb4_match_field *jump; }; /* Accept a rule with a jump to transport layer header based on IHL field in * IPv4 header. */ static const struct cxgb4_next_header cxgb4_ipv4_jumps[] = { { .offset = 0, .offoff = 0, .shift = 6, .mask = 0xF, .match_off = 8, .match_val = 0x600, .match_mask = 0xFF00, .jump = cxgb4_tcp_fields }, { .offset = 0, .offoff = 0, .shift = 6, .mask = 0xF, .match_off = 8, .match_val = 0x1100, .match_mask = 0xFF00, .jump = cxgb4_udp_fields }, { .jump = NULL } }; /* Accept a rule with a jump directly past the 40 Bytes of IPv6 fixed header * to get to transport layer header. */ static const struct cxgb4_next_header cxgb4_ipv6_jumps[] = { { .offset = 0x28, .offoff = 0, .shift = 0, .mask = 0, .match_off = 4, .match_val = 0x60000, .match_mask = 0xFF0000, .jump = cxgb4_tcp_fields }, { .offset = 0x28, .offoff = 0, .shift = 0, .mask = 0, .match_off = 4, .match_val = 0x110000, .match_mask = 0xFF0000, .jump = cxgb4_udp_fields }, { .jump = NULL } }; struct cxgb4_link { const struct cxgb4_match_field *match_field; /* Next header */ struct ch_filter_specification fs; /* Match spec associated with link */ u32 link_handle; /* Knode handle associated with the link */ unsigned long *tid_map; /* Bitmap for filter tids */ }; struct cxgb4_tc_u32_table { unsigned int size; /* number of entries in table */ struct cxgb4_link table[0]; /* Jump table */ }; #endif /* __CXGB4_TC_U32_PARSE_H */

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