/* 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 */