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1/* SPDX-License-Identifier: GPL-2.0-only */2/* Copyright (C) 2024 Intel Corporation */3 4#ifndef __LIBIE_RX_H5#define __LIBIE_RX_H6 7#include <net/libeth/rx.h>8 9/* Rx buffer management */10 11/* The largest size for a single descriptor as per HW */12#define LIBIE_MAX_RX_BUF_LEN 9728U13/* "True" HW-writeable space: minimum from SW and HW values */14#define LIBIE_RX_BUF_LEN(hr) min_t(u32, LIBETH_RX_PAGE_LEN(hr), \15 LIBIE_MAX_RX_BUF_LEN)16 17/* The maximum frame size as per HW (S/G) */18#define __LIBIE_MAX_RX_FRM_LEN 16382U19/* ATST, HW can chain up to 5 Rx descriptors */20#define LIBIE_MAX_RX_FRM_LEN(hr) \21 min_t(u32, __LIBIE_MAX_RX_FRM_LEN, LIBIE_RX_BUF_LEN(hr) * 5)22/* Maximum frame size minus LL overhead */23#define LIBIE_MAX_MTU \24 (LIBIE_MAX_RX_FRM_LEN(LIBETH_MAX_HEADROOM) - LIBETH_RX_LL_LEN)25 26/* O(1) converting i40e/ice/iavf's 8/10-bit hardware packet type to a parsed27 * bitfield struct.28 */29 30#define LIBIE_RX_PT_NUM 15431 32extern const struct libeth_rx_pt libie_rx_pt_lut[LIBIE_RX_PT_NUM];33 34/**35 * libie_rx_pt_parse - convert HW packet type to software bitfield structure36 * @pt: 10-bit hardware packet type value from the descriptor37 *38 * ```libie_rx_pt_lut``` must be accessed only using this wrapper.39 *40 * Return: parsed bitfield struct corresponding to the provided ptype.41 */42static inline struct libeth_rx_pt libie_rx_pt_parse(u32 pt)43{44 if (unlikely(pt >= LIBIE_RX_PT_NUM))45 pt = 0;46 47 return libie_rx_pt_lut[pt];48}49 50#endif /* __LIBIE_RX_H */51