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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