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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051/* SPDX-License-Identifier: GPL-2.0-only *//* Copyright (C) 2024 Intel Corporation */
#ifndef __LIBIE_RX_H#define __LIBIE_RX_H
#include <net/libeth/rx.h>
/* Rx buffer management */
/* The largest size for a single descriptor as per HW */#define LIBIE_MAX_RX_BUF_LEN 9728U/* "True" HW-writeable space: minimum from SW and HW values */#define LIBIE_RX_BUF_LEN(hr) min_t(u32, LIBETH_RX_PAGE_LEN(hr), \ LIBIE_MAX_RX_BUF_LEN)
/* The maximum frame size as per HW (S/G) */#define __LIBIE_MAX_RX_FRM_LEN 16382U/* ATST, HW can chain up to 5 Rx descriptors */#define LIBIE_MAX_RX_FRM_LEN(hr) \ min_t(u32, __LIBIE_MAX_RX_FRM_LEN, LIBIE_RX_BUF_LEN(hr) * 5)/* Maximum frame size minus LL overhead */#define LIBIE_MAX_MTU \ (LIBIE_MAX_RX_FRM_LEN(LIBETH_MAX_HEADROOM) - LIBETH_RX_LL_LEN)
/* O(1) converting i40e/ice/iavf's 8/10-bit hardware packet type to a parsed * bitfield struct. */
#define LIBIE_RX_PT_NUM 154
extern const struct libeth_rx_pt libie_rx_pt_lut[LIBIE_RX_PT_NUM];
/** * libie_rx_pt_parse - convert HW packet type to software bitfield structure * @pt: 10-bit hardware packet type value from the descriptor * * ```libie_rx_pt_lut``` must be accessed only using this wrapper. * * Return: parsed bitfield struct corresponding to the provided ptype. */static inline struct libeth_rx_pt libie_rx_pt_parse(u32 pt){ if (unlikely(pt >= LIBIE_RX_PT_NUM)) pt = 0;
return libie_rx_pt_lut[pt];}
#endif /* __LIBIE_RX_H */