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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2024 Intel Corporation */
#include <net/libeth/rx.h>
/* Converting abstract packet type numbers into a software structure with
* the packet parameters to do O(1) lookup on Rx.
*/
static const u16 libeth_rx_pt_xdp_oip[] = {
[LIBETH_RX_PT_OUTER_L2] = XDP_RSS_TYPE_NONE,
[LIBETH_RX_PT_OUTER_IPV4] = XDP_RSS_L3_IPV4,
[LIBETH_RX_PT_OUTER_IPV6] = XDP_RSS_L3_IPV6,
};
static const u16 libeth_rx_pt_xdp_iprot[] = {
[LIBETH_RX_PT_INNER_NONE] = XDP_RSS_TYPE_NONE,
[LIBETH_RX_PT_INNER_UDP] = XDP_RSS_L4_UDP,
[LIBETH_RX_PT_INNER_TCP] = XDP_RSS_L4_TCP,
[LIBETH_RX_PT_INNER_SCTP] = XDP_RSS_L4_SCTP,
[LIBETH_RX_PT_INNER_ICMP] = XDP_RSS_L4_ICMP,
[LIBETH_RX_PT_INNER_TIMESYNC] = XDP_RSS_TYPE_NONE,
};
static const u16 libeth_rx_pt_xdp_pl[] = {
[LIBETH_RX_PT_PAYLOAD_NONE] = XDP_RSS_TYPE_NONE,
[LIBETH_RX_PT_PAYLOAD_L2] = XDP_RSS_TYPE_NONE,
[LIBETH_RX_PT_PAYLOAD_L3] = XDP_RSS_TYPE_NONE,
[LIBETH_RX_PT_PAYLOAD_L4] = XDP_RSS_L4,
};
/**
* libeth_rx_pt_gen_hash_type - generate an XDP RSS hash type for a PT
* @pt: PT structure to evaluate
*
* Generates ```hash_type``` field with XDP RSS type values from the parsed
* packet parameters if they're obtained dynamically at runtime.
*/
void libeth_rx_pt_gen_hash_type(struct libeth_rx_pt *pt)
{
pt->hash_type = 0;
pt->hash_type |= libeth_rx_pt_xdp_oip[pt->outer_ip];
pt->hash_type |= libeth_rx_pt_xdp_iprot[pt->inner_prot];
pt->hash_type |= libeth_rx_pt_xdp_pl[pt->payload_layer];
}
EXPORT_SYMBOL_NS_GPL(libeth_rx_pt_gen_hash_type, LIBETH);
/* Module */
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION("Common Ethernet library");
MODULE_LICENSE("GPL");
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