drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_u32_parse.h - manifest_repos/valens - Git at Google

 /*
  * 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) & 0x000000FF;
 	f->mask.tos = (ntohl(mask) >> 16) & 0x000000FF;

 	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) & 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;
 }

 static inline int cxgb4_fill_ipv4_proto(struct ch_filter_specification *f,
 					__be32 val, __be32 mask)
 {
 	f->val.proto  = (ntohl(val)  >> 16) & 0x000000FF;
 	f->mask.proto = (ntohl(mask) >> 16) & 0x000000FF;

 	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) & 0x000000FF;
 	f->mask.tos = (ntohl(mask) >> 20) & 0x000000FF;

 	return 0;
 }

 static inline int cxgb4_fill_ipv6_proto(struct ch_filter_specification *f,
 					__be32 val, __be32 mask)
 {
 	f->val.proto  = (ntohl(val)  >> 8) & 0x000000FF;
 	f->mask.proto = (ntohl(mask) >> 8) & 0x000000FF;

 	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)  & 0x0000FFFF;
 	f->mask.lport = ntohl(mask) & 0x0000FFFF;

 	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 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(0x0f00),
 		},
 		.key = {
 			.off = 8,
 			.val = cpu_to_be32(0x00060000),
 			.mask = cpu_to_be32(0x00ff0000),
 		},
 		.jump = cxgb4_tcp_fields,
 	},
 	{
 		/* UDP Jump */
 		.sel = {
 			.off = 0,
 			.offoff = 0,
 			.offshift = 6,
 			.offmask = cpu_to_be16(0x0f00),
 		},
 		.key = {
 			.off = 8,
 			.val = cpu_to_be32(0x00110000),
 			.mask = cpu_to_be32(0x00ff0000),
 		},
 		.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(0x00000600),
 			.mask = cpu_to_be32(0x0000ff00),
 		},
 		.jump = cxgb4_tcp_fields,
 	},
 	{
 		/* UDP Jump */
 		.sel = {
 			.off = 40,
 			.offoff = 0,
 			.offshift = 0,
 			.offmask = 0,
 		},
 		.key = {
 			.off = 4,
 			.val = cpu_to_be32(0x00001100),
 			.mask = cpu_to_be32(0x0000ff00),
 		},
 		.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 */
	/*
	* 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) & 0x000000FF;
	f->mask.tos = (ntohl(mask) >> 16) & 0x000000FF;

	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) & 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;
	}

	static inline int cxgb4_fill_ipv4_proto(struct ch_filter_specification *f,
	__be32 val, __be32 mask)
	{
	f->val.proto = (ntohl(val) >> 16) & 0x000000FF;
	f->mask.proto = (ntohl(mask) >> 16) & 0x000000FF;

	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) & 0x000000FF;
	f->mask.tos = (ntohl(mask) >> 20) & 0x000000FF;

	return 0;
	}

	static inline int cxgb4_fill_ipv6_proto(struct ch_filter_specification *f,
	__be32 val, __be32 mask)
	{
	f->val.proto = (ntohl(val) >> 8) & 0x000000FF;
	f->mask.proto = (ntohl(mask) >> 8) & 0x000000FF;

	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) & 0x0000FFFF;
	f->mask.lport = ntohl(mask) & 0x0000FFFF;

	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 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(0x0f00),
	},
	.key = {
	.off = 8,
	.val = cpu_to_be32(0x00060000),
	.mask = cpu_to_be32(0x00ff0000),
	},
	.jump = cxgb4_tcp_fields,
	},
	{
	/* UDP Jump */
	.sel = {
	.off = 0,
	.offoff = 0,
	.offshift = 6,
	.offmask = cpu_to_be16(0x0f00),
	},
	.key = {
	.off = 8,
	.val = cpu_to_be32(0x00110000),
	.mask = cpu_to_be32(0x00ff0000),
	},
	.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(0x00000600),
	.mask = cpu_to_be32(0x0000ff00),
	},
	.jump = cxgb4_tcp_fields,
	},
	{
	/* UDP Jump */
	.sel = {
	.off = 40,
	.offoff = 0,
	.offshift = 0,
	.offmask = 0,
	},
	.key = {
	.off = 4,
	.val = cpu_to_be32(0x00001100),
	.mask = cpu_to_be32(0x0000ff00),
	},
	.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 */