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 static inline u8 *efx_rx_buf_va(struct efx_rx_buffer *buf) 22 { 23 return page_address(buf->page) + buf->page_offset; 24 } 25 26 static 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 40 void efx_rx_slow_fill(struct timer_list *t); 41 42 void efx_recycle_rx_pages(struct efx_channel *channel, 43 struct efx_rx_buffer *rx_buf, 44 unsigned int n_frags); 45 void efx_discard_rx_packet(struct efx_channel *channel, 46 struct efx_rx_buffer *rx_buf, 47 unsigned int n_frags); 48 49 int efx_probe_rx_queue(struct efx_rx_queue *rx_queue); 50 void efx_init_rx_queue(struct efx_rx_queue *rx_queue); 51 void efx_fini_rx_queue(struct efx_rx_queue *rx_queue); 52 void efx_remove_rx_queue(struct efx_rx_queue *rx_queue); 53 void efx_destroy_rx_queue(struct efx_rx_queue *rx_queue); 54 55 void efx_init_rx_buffer(struct efx_rx_queue *rx_queue, 56 struct page *page, 57 unsigned int page_offset, 58 u16 flags); 59 void efx_unmap_rx_buffer(struct efx_nic *efx, struct efx_rx_buffer *rx_buf); 60 61 static 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 69 void efx_free_rx_buffers(struct efx_rx_queue *rx_queue, 70 struct efx_rx_buffer *rx_buf, 71 unsigned int num_bufs); 72 73 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); 74 void efx_rx_config_page_split(struct efx_nic *efx); 75 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic); 76 77 void 78 efx_rx_packet_gro(struct efx_channel *channel, struct efx_rx_buffer *rx_buf, 79 unsigned int n_frags, u8 *eh, __wsum csum); 80 81 struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx); 82 struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id); 83 void efx_free_rss_context_entry(struct efx_rss_context *ctx); 84 void efx_set_default_rx_indir_table(struct efx_nic *efx, 85 struct efx_rss_context *ctx); 86 87 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); 88 bool efx_filter_spec_equal(const struct efx_filter_spec *left, 89 const struct efx_filter_spec *right); 90 u32 efx_filter_spec_hash(const struct efx_filter_spec *spec); 91 92 #ifdef CONFIG_RFS_ACCEL 93 bool efx_rps_check_rule(struct efx_arfs_rule *rule, unsigned int filter_idx, 94 bool *force); 95 struct efx_arfs_rule *efx_rps_hash_find(struct efx_nic *efx, 96 const struct efx_filter_spec *spec); 97 struct efx_arfs_rule *efx_rps_hash_add(struct efx_nic *efx, 98 const struct efx_filter_spec *spec, 99 bool *new); 100 void efx_rps_hash_del(struct efx_nic *efx, const struct efx_filter_spec *spec); 101 102 int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, 103 u16 rxq_index, u32 flow_id); 104 bool __efx_filter_rfs_expire(struct efx_channel *channel, unsigned int quota); 105 #endif 106 107 int efx_probe_filters(struct efx_nic *efx); 108 void efx_remove_filters(struct efx_nic *efx); 109 110 #endif 111