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/* 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 */
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