1/* SPDX-License-Identifier: GPL-2.0-only */
2/****************************************************************************
3 * Driver for Solarflare network controllers and boards
4 * Copyright 2018 Solarflare Communications Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
9 */
10
11#ifndef EFX_RX_COMMON_H
12#define EFX_RX_COMMON_H
13
14/* Preferred number of descriptors to fill at once */
15#define EFX_RX_PREFERRED_BATCH 8U
16
17/* Each packet can consume up to ceil(max_frame_len / buffer_size) buffers */
18#define EFX_RX_MAX_FRAGS DIV_ROUND_UP(EFX_MAX_FRAME_LEN(EFX_MAX_MTU), \
19				      EFX_RX_USR_BUF_SIZE)
20
21static inline u8 *efx_rx_buf_va(struct efx_rx_buffer *buf)
22{
23	return page_address(buf->page) + buf->page_offset;
24}
25
26static inline u32 efx_rx_buf_hash(struct efx_nic *efx, const u8 *eh)
27{
28#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
29	return __le32_to_cpup((const __le32 *)(eh + efx->rx_packet_hash_offset));
30#else
31	const u8 *data = eh + efx->rx_packet_hash_offset;
32
33	return (u32)data[0]	  |
34	       (u32)data[1] << 8  |
35	       (u32)data[2] << 16 |
36	       (u32)data[3] << 24;
37#endif
38}
39
40void efx_rx_slow_fill(struct timer_list *t);
41
42void efx_recycle_rx_pages(struct efx_channel *channel,
43			  struct efx_rx_buffer *rx_buf,
44			  unsigned int n_frags);
45void efx_discard_rx_packet(struct efx_channel *channel,
46			   struct efx_rx_buffer *rx_buf,
47			   unsigned int n_frags);
48
49int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
50void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
51void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
52void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
53void efx_destroy_rx_queue(struct efx_rx_queue *rx_queue);
54
55void efx_init_rx_buffer(struct efx_rx_queue *rx_queue,
56			struct page *page,
57			unsigned int page_offset,
58			u16 flags);
59void efx_unmap_rx_buffer(struct efx_nic *efx, struct efx_rx_buffer *rx_buf);
60
61static inline void efx_sync_rx_buffer(struct efx_nic *efx,
62				      struct efx_rx_buffer *rx_buf,
63				      unsigned int len)
64{
65	dma_sync_single_for_cpu(&efx->pci_dev->dev, rx_buf->dma_addr, len,
66				DMA_FROM_DEVICE);
67}
68
69void efx_free_rx_buffers(struct efx_rx_queue *rx_queue,
70			 struct efx_rx_buffer *rx_buf,
71			 unsigned int num_bufs);
72
73void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
74void efx_rx_config_page_split(struct efx_nic *efx);
75void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
76
77void
78efx_rx_packet_gro(struct efx_channel *channel, struct efx_rx_buffer *rx_buf,
79		  unsigned int n_frags, u8 *eh, __wsum csum);
80
81struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx);
82struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id);
83void efx_free_rss_context_entry(struct efx_rss_context *ctx);
84void efx_set_default_rx_indir_table(struct efx_nic *efx,
85				    struct efx_rss_context *ctx);
86
87bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
88bool efx_filter_spec_equal(const struct efx_filter_spec *left,
89			   const struct efx_filter_spec *right);
90u32 efx_filter_spec_hash(const struct efx_filter_spec *spec);
91
92#ifdef CONFIG_RFS_ACCEL
93bool efx_rps_check_rule(struct efx_arfs_rule *rule, unsigned int filter_idx,
94			bool *force);
95struct efx_arfs_rule *efx_rps_hash_find(struct efx_nic *efx,
96					const struct efx_filter_spec *spec);
97struct efx_arfs_rule *efx_rps_hash_add(struct efx_nic *efx,
98				       const struct efx_filter_spec *spec,
99				       bool *new);
100void efx_rps_hash_del(struct efx_nic *efx, const struct efx_filter_spec *spec);
101
102int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
103		   u16 rxq_index, u32 flow_id);
104bool __efx_filter_rfs_expire(struct efx_channel *channel, unsigned int quota);
105#endif
106
107int efx_probe_filters(struct efx_nic *efx);
108void efx_remove_filters(struct efx_nic *efx);
109
110#endif
111