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