1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* Copyright (C) 2024 Intel Corporation */ 3 4 #ifndef __LIBIE_RX_H 5 #define __LIBIE_RX_H 6 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 9728U 13 /* "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 16382U 19 /* 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 parsed 27 * bitfield struct. 28 */ 29 30 #define LIBIE_RX_PT_NUM 154 31 32 extern 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 structure 36 * @pt: 10-bit hardware packet type value from the descriptor 37 * 38 * ```libie_rx_pt_lut``` must be accessed only using this wrapper. 39 * 40 * Return: parsed bitfield struct corresponding to the provided ptype. 41 */ libie_rx_pt_parse(u32 pt)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