path: root/drivers/net/ethernet/intel/ice/ice_flow.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019, Intel Corporation. */

#include "ice_common.h"
#include "ice_flow.h"

/* Describe properties of a protocol header field */
struct ice_flow_field_info {
	enum ice_flow_seg_hdr hdr;
	s16 off;	/* Offset from start of a protocol header, in bits */
	u16 size;	/* Size of fields in bits */
};

#define ICE_FLOW_FLD_INFO(_hdr, _offset_bytes, _size_bytes) { \
	.hdr = _hdr, \
	.off = (_offset_bytes) * BITS_PER_BYTE, \
	.size = (_size_bytes) * BITS_PER_BYTE, \
}

/* Table containing properties of supported protocol header fields */
static const
struct ice_flow_field_info ice_flds_info[ICE_FLOW_FIELD_IDX_MAX] = {
	/* IPv4 / IPv6 */
	/* ICE_FLOW_FIELD_IDX_IPV4_SA */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_IPV4, 12, sizeof(struct in_addr)),
	/* ICE_FLOW_FIELD_IDX_IPV4_DA */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_IPV4, 16, sizeof(struct in_addr)),
	/* ICE_FLOW_FIELD_IDX_IPV6_SA */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_IPV6, 8, sizeof(struct in6_addr)),
	/* ICE_FLOW_FIELD_IDX_IPV6_DA */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_IPV6, 24, sizeof(struct in6_addr)),
	/* Transport */
	/* ICE_FLOW_FIELD_IDX_TCP_SRC_PORT */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_TCP, 0, sizeof(__be16)),
	/* ICE_FLOW_FIELD_IDX_TCP_DST_PORT */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_TCP, 2, sizeof(__be16)),
	/* ICE_FLOW_FIELD_IDX_UDP_SRC_PORT */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_UDP, 0, sizeof(__be16)),
	/* ICE_FLOW_FIELD_IDX_UDP_DST_PORT */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_UDP, 2, sizeof(__be16)),
	/* ICE_FLOW_FIELD_IDX_SCTP_SRC_PORT */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_SCTP, 0, sizeof(__be16)),
	/* ICE_FLOW_FIELD_IDX_SCTP_DST_PORT */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_SCTP, 2, sizeof(__be16)),
	/* GRE */
	/* ICE_FLOW_FIELD_IDX_GRE_KEYID */
	ICE_FLOW_FLD_INFO(ICE_FLOW_SEG_HDR_GRE, 12,
			  sizeof_field(struct gre_full_hdr, key)),
};

/* Bitmaps indicating relevant packet types for a particular protocol header
 *
 * Packet types for packets with an Outer/First/Single IPv4 header
 */
static const u32 ice_ptypes_ipv4_ofos[] = {
	0x1DC00000, 0x04000800, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
};

/* Packet types for packets with an Innermost/Last IPv4 header */
static const u32 ice_ptypes_ipv4_il[] = {
	0xE0000000, 0xB807700E, 0x80000003, 0xE01DC03B,
	0x0000000E, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
};

/* Packet types for packets with an Outer/First/Single IPv6 header */
static const u32 ice_ptypes_ipv6_ofos[] = {
	0x00000000, 0x00000000, 0x77000000, 0x10002000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
};

/* Packet types for packets with an Innermost/Last IPv6 header */
static const u32 ice_ptypes_ipv6_il[] = {
	0x00000000, 0x03B80770, 0x000001DC, 0x0EE00000,
	0x00000770, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000, 0x00000000, 0x00000000, 0x00000000,
	0x00000000,