drivers/net/ethernet/sfc/rx_common.h

   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 void efx_free_rx_buffers(struct efx_rx_queue *rx_queue,
  61                          struct efx_rx_buffer *rx_buf,
  62                          unsigned int num_bufs);
  63
  64 void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue);
  65 void efx_rx_config_page_split(struct efx_nic *efx);
  66 void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic);
  67
  68 void
  69 efx_rx_packet_gro(struct efx_channel *channel, struct efx_rx_buffer *rx_buf,
  70                   unsigned int n_frags, u8 *eh);
  71
  72 struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx);
  73 struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id);
  74 void efx_free_rss_context_entry(struct efx_rss_context *ctx);
  75 void efx_set_default_rx_indir_table(struct efx_nic *efx,
  76                                     struct efx_rss_context *ctx);
  77
  78 bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec);
  79 bool efx_filter_spec_equal(const struct efx_filter_spec *left,
  80                            const struct efx_filter_spec *right);
  81 u32 efx_filter_spec_hash(const struct efx_filter_spec *spec);
  82
  83 #ifdef CONFIG_RFS_ACCEL
  84 bool efx_rps_check_rule(struct efx_arfs_rule *rule, unsigned int filter_idx,
  85                         bool *force);
  86 struct efx_arfs_rule *efx_rps_hash_find(struct efx_nic *efx,
  87                                         const struct efx_filter_spec *spec);
  88 struct efx_arfs_rule *efx_rps_hash_add(struct efx_nic *efx,
  89                                        const struct efx_filter_spec *spec,
  90                                        bool *new);
  91 void efx_rps_hash_del(struct efx_nic *efx, const struct efx_filter_spec *spec);
  92 #endif
  93
  94 int efx_probe_filters(struct efx_nic *efx);
  95 void efx_remove_filters(struct efx_nic *efx);
  96
  97 #endif