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
21/* Number of RX buffers to recycle pages for. When creating the RX page recycle
22 * ring, this number is divided by the number of buffers per page to calculate
23 * the number of pages to store in the RX page recycle ring.
24 */
25#define EFX_RECYCLE_RING_SIZE_10G 256
26
27static inline u8 *efx_rx_buf_va(struct efx_rx_buffer *buf)
28{
29 return page_address(buf->page) + buf->page_offset;
30}
31
32static inline u32 efx_rx_buf_hash(struct efx_nic *efx, const u8 *eh)
33{
34#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
35 return __le32_to_cpup(p: (const __le32 *)(eh + efx->rx_packet_hash_offset));
36#else
37 const u8 *data = eh + efx->rx_packet_hash_offset;
38
39 return (u32)data[0] |
40 (u32)data[1] << 8 |
41 (u32)data[2] << 16 |
42 (u32)data[3] << 24;
43#endif
44}
45
46void efx_rx_slow_fill(struct timer_list *t);
47
48void efx_recycle_rx_pages(struct efx_channel *channel,
49 struct efx_rx_buffer *rx_buf,
50 unsigned int n_frags);
51void efx_discard_rx_packet(struct efx_channel *channel,
52 struct efx_rx_buffer *rx_buf,
53 unsigned int n_frags);
54
55int efx_probe_rx_queue(struct efx_rx_queue *rx_queue);
56void efx_init_rx_queue(struct efx_rx_queue *rx_queue);
57void efx_fini_rx_queue(struct efx_rx_queue *rx_queue);
58void efx_remove_rx_queue(struct efx_rx_queue *rx_queue);
59void efx_destroy_rx_queue(struct efx_rx_queue *rx_queue);
60
61void efx_init_rx_buffer(struct efx_rx_queue *rx_queue,
62 struct page *page,
63 unsigned int page_offset,
64 u16 flags);
65void efx_unmap_rx_buffer(struct efx_nic *efx, struct efx_rx_buffer *rx_buf);
66
67static inline void efx_sync_rx_buffer(struct efx_nic *efx,
68 struct efx_rx_buffer *rx_buf,
69 unsigned int len)
70{
71 dma_sync_single_for_cpu(dev: &efx->pci_dev->dev, addr: rx_buf->dma_addr, size: len,
72 dir: DMA_FROM_DEVICE);
73}
74
75void efx_free_rx_buffers(struct efx_rx_queue *rx_queue,
76 struct efx_rx_buffer *rx_buf,
77 unsigned int num_bufs);
78
79void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
80void efx_rx_config_page_split(struct efx_nic *efx);
81void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
82
83void
84efx_rx_packet_gro(struct efx_channel *channel, struct efx_rx_buffer *rx_buf,
85 unsigned int n_frags, u8 *eh, __wsum csum);
86
87struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx);
88struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id);
89void efx_free_rss_context_entry(struct efx_rss_context *ctx);
90void efx_set_default_rx_indir_table(struct efx_nic *efx,
91 struct efx_rss_context *ctx);
92
93bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
94bool efx_filter_spec_equal(const struct efx_filter_spec *left,
95 const struct efx_filter_spec *right);
96u32 efx_filter_spec_hash(const struct efx_filter_spec *spec);
97
98#ifdef CONFIG_RFS_ACCEL
99bool efx_rps_check_rule(struct efx_arfs_rule *rule, unsigned int filter_idx,
100 bool *force);
101struct efx_arfs_rule *efx_rps_hash_find(struct efx_nic *efx,
102 const struct efx_filter_spec *spec);
103struct efx_arfs_rule *efx_rps_hash_add(struct efx_nic *efx,
104 const struct efx_filter_spec *spec,
105 bool *new);
106void efx_rps_hash_del(struct efx_nic *efx, const struct efx_filter_spec *spec);
107
108int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
109 u16 rxq_index, u32 flow_id);
110bool __efx_filter_rfs_expire(struct efx_channel *channel, unsigned int quota);
111#endif
112
113int efx_probe_filters(struct efx_nic *efx);
114void efx_remove_filters(struct efx_nic *efx);
115
116#endif
117

source code of linux/drivers/net/ethernet/sfc/rx_common.h