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