diff options
Diffstat (limited to 'drivers/net/ethernet/sfc/rx_common.h')
-rw-r--r-- | drivers/net/ethernet/sfc/rx_common.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/rx_common.h b/drivers/net/ethernet/sfc/rx_common.h new file mode 100644 index 000000000..fbd276930 --- /dev/null +++ b/drivers/net/ethernet/sfc/rx_common.h @@ -0,0 +1,116 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/**************************************************************************** + * Driver for Solarflare network controllers and boards + * Copyright 2018 Solarflare Communications Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation, incorporated herein by reference. + */ + +#ifndef EFX_RX_COMMON_H +#define EFX_RX_COMMON_H + +/* Preferred number of descriptors to fill at once */ +#define EFX_RX_PREFERRED_BATCH 8U + +/* Each packet can consume up to ceil(max_frame_len / buffer_size) buffers */ +#define EFX_RX_MAX_FRAGS DIV_ROUND_UP(EFX_MAX_FRAME_LEN(EFX_MAX_MTU), \ + EFX_RX_USR_BUF_SIZE) + +/* Number of RX buffers to recycle pages for. When creating the RX page recycle + * ring, this number is divided by the number of buffers per page to calculate + * the number of pages to store in the RX page recycle ring. + */ +#define EFX_RECYCLE_RING_SIZE_10G 256 + +static inline u8 *efx_rx_buf_va(struct efx_rx_buffer *buf) +{ + return page_address(buf->page) + buf->page_offset; +} + +static inline u32 efx_rx_buf_hash(struct efx_nic *efx, const u8 *eh) +{ +#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) + return __le32_to_cpup((const __le32 *)(eh + efx->rx_packet_hash_offset)); +#else + const u8 *data = eh + efx->rx_packet_hash_offset; + + return (u32)data[0] | + (u32)data[1] << 8 | + (u32)data[2] << 16 | + (u32)data[3] << 24; +#endif +} + +void efx_rx_slow_fill(struct timer_list *t); + +void efx_recycle_rx_pages(struct efx_channel *channel, + struct efx_rx_buffer *rx_buf, + unsigned int n_frags); +void efx_discard_rx_packet(struct efx_channel *channel, + struct efx_rx_buffer *rx_buf, + unsigned int n_frags); + +int efx_probe_rx_queue(struct efx_rx_queue *rx_queue); +void efx_init_rx_queue(struct efx_rx_queue *rx_queue); +void efx_fini_rx_queue(struct efx_rx_queue *rx_queue); +void efx_remove_rx_queue(struct efx_rx_queue *rx_queue); +void efx_destroy_rx_queue(struct efx_rx_queue *rx_queue); + +void efx_init_rx_buffer(struct efx_rx_queue *rx_queue, + struct page *page, + unsigned int page_offset, + u16 flags); +void efx_unmap_rx_buffer(struct efx_nic *efx, struct efx_rx_buffer *rx_buf); + +static inline void efx_sync_rx_buffer(struct efx_nic *efx, + struct efx_rx_buffer *rx_buf, + unsigned int len) +{ + dma_sync_single_for_cpu(&efx->pci_dev->dev, rx_buf->dma_addr, len, + DMA_FROM_DEVICE); +} + +void efx_free_rx_buffers(struct efx_rx_queue *rx_queue, + struct efx_rx_buffer *rx_buf, + unsigned int num_bufs); + +void efx_schedule_slow_fill(struct efx_rx_queue *rx_queue); +void efx_rx_config_page_split(struct efx_nic *efx); +void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic); + +void +efx_rx_packet_gro(struct efx_channel *channel, struct efx_rx_buffer *rx_buf, + unsigned int n_frags, u8 *eh, __wsum csum); + +struct efx_rss_context *efx_alloc_rss_context_entry(struct efx_nic *efx); +struct efx_rss_context *efx_find_rss_context_entry(struct efx_nic *efx, u32 id); +void efx_free_rss_context_entry(struct efx_rss_context *ctx); +void efx_set_default_rx_indir_table(struct efx_nic *efx, + struct efx_rss_context *ctx); + +bool efx_filter_is_mc_recipient(const struct efx_filter_spec *spec); +bool efx_filter_spec_equal(const struct efx_filter_spec *left, + const struct efx_filter_spec *right); +u32 efx_filter_spec_hash(const struct efx_filter_spec *spec); + +#ifdef CONFIG_RFS_ACCEL +bool efx_rps_check_rule(struct efx_arfs_rule *rule, unsigned int filter_idx, + bool *force); +struct efx_arfs_rule *efx_rps_hash_find(struct efx_nic *efx, + const struct efx_filter_spec *spec); +struct efx_arfs_rule *efx_rps_hash_add(struct efx_nic *efx, + const struct efx_filter_spec *spec, + bool *new); +void efx_rps_hash_del(struct efx_nic *efx, const struct efx_filter_spec *spec); + +int efx_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb, + u16 rxq_index, u32 flow_id); +bool __efx_filter_rfs_expire(struct efx_channel *channel, unsigned int quota); +#endif + +int efx_probe_filters(struct efx_nic *efx); +void efx_remove_filters(struct efx_nic *efx); + +#endif |