1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright(c) 2018 Intel Corporation. */ 3 4 #ifndef _I40E_XSK_H_ 5 #define _I40E_XSK_H_ 6 7 #include <linux/types.h> 8 9 /* This value should match the pragma in the loop_unrolled_for 10 * macro. Why 4? It is strictly empirical. It seems to be a good 11 * compromise between the advantage of having simultaneous outstanding 12 * reads to the DMA array that can hide each others latency and the 13 * disadvantage of having a larger code path. 14 */ 15 #define PKTS_PER_BATCH 4 16 17 #ifdef __clang__ 18 #define loop_unrolled_for _Pragma("clang loop unroll_count(4)") for 19 #elif __GNUC__ >= 8 20 #define loop_unrolled_for _Pragma("GCC unroll 4") for 21 #else 22 #define loop_unrolled_for for 23 #endif 24 25 struct i40e_ring; 26 struct i40e_vsi; 27 struct net_device; 28 struct xsk_buff_pool; 29 30 int i40e_queue_pair_disable(struct i40e_vsi *vsi, int queue_pair); 31 int i40e_queue_pair_enable(struct i40e_vsi *vsi, int queue_pair); 32 int i40e_xsk_pool_setup(struct i40e_vsi *vsi, struct xsk_buff_pool *pool, 33 u16 qid); 34 bool i40e_alloc_rx_buffers_zc(struct i40e_ring *rx_ring, u16 cleaned_count); 35 int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget); 36 37 bool i40e_clean_xdp_tx_irq(struct i40e_vsi *vsi, struct i40e_ring *tx_ring); 38 int i40e_xsk_wakeup(struct net_device *dev, u32 queue_id, u32 flags); 39 int i40e_realloc_rx_bi_zc(struct i40e_vsi *vsi, bool zc); 40 void i40e_clear_rx_bi_zc(struct i40e_ring *rx_ring); 41 42 #endif /* _I40E_XSK_H_ */ 43