/*
* 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, __be32 val, __be32 mask);
};
/* IPv4 match fields */
static inline int cxgb4_fill_ipv4_tos(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
f->val.tos = (ntohl(val) >> 16 ) & 0 x000000FF;
f->mask.tos = (ntohl(mask) >> 16 ) & 0 x000000FF;
return 0 ;
}
static inline int cxgb4_fill_ipv4_frag(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
u32 mask_val;
u8 frag_val;
frag_val = (ntohl(val) >> 13 ) & 0 x00000007;
mask_val = ntohl(mask) & 0 x0000FFFF;
if (frag_val == 0 x1 && mask_val != 0 x3FFF) { /* MF set */
f->val.frag = 1 ;
f->mask.frag = 1 ;
} else if (frag_val == 0 x2 && mask_val != 0 x3FFF) { /* DF set */
f->val.frag = 0 ;
f->mask.frag = 1 ;
} else {
return -EINVAL;
}
return 0 ;
}
static inline int cxgb4_fill_ipv4_proto(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
f->val.proto = (ntohl(val) >> 16 ) & 0 x000000FF;
f->mask.proto = (ntohl(mask) >> 16 ) & 0 x000000FF;
return 0 ;
}
static inline int cxgb4_fill_ipv4_src_ip(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
memcpy(&f->val.fip[0 ], &val, sizeof (u32));
memcpy(&f->mask.fip[0 ], &mask, sizeof (u32));
return 0 ;
}
static inline int cxgb4_fill_ipv4_dst_ip(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
memcpy(&f->val.lip[0 ], &val, sizeof (u32));
memcpy(&f->mask.lip[0 ], &mask, sizeof (u32));
return 0 ;
}
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,
__be32 val, __be32 mask)
{
f->val.tos = (ntohl(val) >> 20 ) & 0 x000000FF;
f->mask.tos = (ntohl(mask) >> 20 ) & 0 x000000FF;
return 0 ;
}
static inline int cxgb4_fill_ipv6_proto(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
f->val.proto = (ntohl(val) >> 8 ) & 0 x000000FF;
f->mask.proto = (ntohl(mask) >> 8 ) & 0 x000000FF;
return 0 ;
}
static inline int cxgb4_fill_ipv6_src_ip0(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
memcpy(&f->val.fip[0 ], &val, sizeof (u32));
memcpy(&f->mask.fip[0 ], &mask, sizeof (u32));
return 0 ;
}
static inline int cxgb4_fill_ipv6_src_ip1(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
memcpy(&f->val.fip[4 ], &val, sizeof (u32));
memcpy(&f->mask.fip[4 ], &mask, sizeof (u32));
return 0 ;
}
static inline int cxgb4_fill_ipv6_src_ip2(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
memcpy(&f->val.fip[8 ], &val, sizeof (u32));
memcpy(&f->mask.fip[8 ], &mask, sizeof (u32));
return 0 ;
}
static inline int cxgb4_fill_ipv6_src_ip3(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
memcpy(&f->val.fip[12 ], &val, sizeof (u32));
memcpy(&f->mask.fip[12 ], &mask, sizeof (u32));
return 0 ;
}
static inline int cxgb4_fill_ipv6_dst_ip0(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
memcpy(&f->val.lip[0 ], &val, sizeof (u32));
memcpy(&f->mask.lip[0 ], &mask, sizeof (u32));
return 0 ;
}
static inline int cxgb4_fill_ipv6_dst_ip1(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
memcpy(&f->val.lip[4 ], &val, sizeof (u32));
memcpy(&f->mask.lip[4 ], &mask, sizeof (u32));
return 0 ;
}
static inline int cxgb4_fill_ipv6_dst_ip2(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
memcpy(&f->val.lip[8 ], &val, sizeof (u32));
memcpy(&f->mask.lip[8 ], &mask, sizeof (u32));
return 0 ;
}
static inline int cxgb4_fill_ipv6_dst_ip3(struct ch_filter_specification *f,
__be32 val, __be32 mask)
{
memcpy(&f->val.lip[12 ], &val, sizeof (u32));
memcpy(&f->mask.lip[12 ], &mask, sizeof (u32));
return 0 ;
}
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,
__be32 val, __be32 mask)
{
f->val.fport = ntohl(val) >> 16 ;
f->mask.fport = ntohl(mask) >> 16 ;
f->val.lport = ntohl(val) & 0 x0000FFFF;
f->mask.lport = ntohl(mask) & 0 x0000FFFF;
return 0 ;
};
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 {
/* Offset, shift, and mask added to beginning of the header
* 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 .
*/
struct tc_u32_sel_hdr sel;
struct tc_u32_key key;
/* 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[] = {
{
/* TCP Jump */
.sel = {
.off = 0 ,
.offoff = 0 ,
.offshift = 6 ,
.offmask = cpu_to_be16(0 x0f00),
},
.key = {
.off = 8 ,
.val = cpu_to_be32(0 x00060000),
.mask = cpu_to_be32(0 x00ff0000),
},
.jump = cxgb4_tcp_fields,
},
{
/* UDP Jump */
.sel = {
.off = 0 ,
.offoff = 0 ,
.offshift = 6 ,
.offmask = cpu_to_be16(0 x0f00),
},
.key = {
.off = 8 ,
.val = cpu_to_be32(0 x00110000),
.mask = cpu_to_be32(0 x00ff0000),
},
.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[] = {
{
/* TCP Jump */
.sel = {
.off = 40 ,
.offoff = 0 ,
.offshift = 0 ,
.offmask = 0 ,
},
.key = {
.off = 4 ,
.val = cpu_to_be32(0 x00000600),
.mask = cpu_to_be32(0 x0000ff00),
},
.jump = cxgb4_tcp_fields,
},
{
/* UDP Jump */
.sel = {
.off = 40 ,
.offoff = 0 ,
.offshift = 0 ,
.offmask = 0 ,
},
.key = {
.off = 4 ,
.val = cpu_to_be32(0 x00001100),
.mask = cpu_to_be32(0 x0000ff00),
},
.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[] __counted_by(size); /* Jump table */
};
#endif /* __CXGB4_TC_U32_PARSE_H */
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