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path: root/drivers/net/ethernet/sfc/rx.c
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Diffstat (limited to 'drivers/net/ethernet/sfc/rx.c')
-rw-r--r--drivers/net/ethernet/sfc/rx.c188
1 files changed, 0 insertions, 188 deletions
diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index 0e04ed7f6382..18001195410f 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -33,13 +33,6 @@
/* Maximum rx prefix used by any architecture. */
#define EFX_MAX_RX_PREFIX_SIZE 16
-/* 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_IOMMU 4096
-#define EFX_RECYCLE_RING_SIZE_NOIOMMU (2 * EFX_RX_PREFERRED_BATCH)
-
/* Size of buffer allocated for skb header area. */
#define EFX_SKB_HEADERS 128u
@@ -47,24 +40,6 @@
#define EFX_RX_MAX_FRAGS DIV_ROUND_UP(EFX_MAX_FRAME_LEN(EFX_MAX_MTU), \
EFX_RX_USR_BUF_SIZE)
-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
-}
-
static inline void efx_sync_rx_buffer(struct efx_nic *efx,
struct efx_rx_buffer *rx_buf,
unsigned int len)
@@ -73,100 +48,6 @@ static inline void efx_sync_rx_buffer(struct efx_nic *efx,
DMA_FROM_DEVICE);
}
-/* Check the RX page recycle ring for a page that can be reused. */
-struct page *efx_reuse_page(struct efx_rx_queue *rx_queue)
-{
- struct efx_nic *efx = rx_queue->efx;
- struct page *page;
- struct efx_rx_page_state *state;
- unsigned index;
-
- index = rx_queue->page_remove & rx_queue->page_ptr_mask;
- page = rx_queue->page_ring[index];
- if (page == NULL)
- return NULL;
-
- rx_queue->page_ring[index] = NULL;
- /* page_remove cannot exceed page_add. */
- if (rx_queue->page_remove != rx_queue->page_add)
- ++rx_queue->page_remove;
-
- /* If page_count is 1 then we hold the only reference to this page. */
- if (page_count(page) == 1) {
- ++rx_queue->page_recycle_count;
- return page;
- } else {
- state = page_address(page);
- dma_unmap_page(&efx->pci_dev->dev, state->dma_addr,
- PAGE_SIZE << efx->rx_buffer_order,
- DMA_FROM_DEVICE);
- put_page(page);
- ++rx_queue->page_recycle_failed;
- }
-
- return NULL;
-}
-
-/* Attempt to recycle the page if there is an RX recycle ring; the page can
- * only be added if this is the final RX buffer, to prevent pages being used in
- * the descriptor ring and appearing in the recycle ring simultaneously.
- */
-static void efx_recycle_rx_page(struct efx_channel *channel,
- struct efx_rx_buffer *rx_buf)
-{
- struct page *page = rx_buf->page;
- struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);
- struct efx_nic *efx = rx_queue->efx;
- unsigned index;
-
- /* Only recycle the page after processing the final buffer. */
- if (!(rx_buf->flags & EFX_RX_BUF_LAST_IN_PAGE))
- return;
-
- index = rx_queue->page_add & rx_queue->page_ptr_mask;
- if (rx_queue->page_ring[index] == NULL) {
- unsigned read_index = rx_queue->page_remove &
- rx_queue->page_ptr_mask;
-
- /* The next slot in the recycle ring is available, but
- * increment page_remove if the read pointer currently
- * points here.
- */
- if (read_index == index)
- ++rx_queue->page_remove;
- rx_queue->page_ring[index] = page;
- ++rx_queue->page_add;
- return;
- }
- ++rx_queue->page_recycle_full;
- efx_unmap_rx_buffer(efx, rx_buf);
- put_page(rx_buf->page);
-}
-
-/* Recycle the pages that are used by buffers that have just been received. */
-static void efx_recycle_rx_pages(struct efx_channel *channel,
- struct efx_rx_buffer *rx_buf,
- unsigned int n_frags)
-{
- struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);
-
- do {
- efx_recycle_rx_page(channel, rx_buf);
- rx_buf = efx_rx_buf_next(rx_queue, rx_buf);
- } while (--n_frags);
-}
-
-static void efx_discard_rx_packet(struct efx_channel *channel,
- struct efx_rx_buffer *rx_buf,
- unsigned int n_frags)
-{
- struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);
-
- efx_recycle_rx_pages(channel, rx_buf, n_frags);
-
- efx_free_rx_buffers(rx_queue, rx_buf, n_frags);
-}
-
static void efx_rx_packet__check_len(struct efx_rx_queue *rx_queue,
struct efx_rx_buffer *rx_buf,
int len)
@@ -190,53 +71,6 @@ static void efx_rx_packet__check_len(struct efx_rx_queue *rx_queue,
efx_rx_queue_channel(rx_queue)->n_rx_overlength++;
}
-/* Pass a received packet up through GRO. GRO can handle pages
- * regardless of checksum state and skbs with a good checksum.
- */
-static void
-efx_rx_packet_gro(struct efx_channel *channel, struct efx_rx_buffer *rx_buf,
- unsigned int n_frags, u8 *eh)
-{
- struct napi_struct *napi = &channel->napi_str;
- struct efx_nic *efx = channel->efx;
- struct sk_buff *skb;
-
- skb = napi_get_frags(napi);
- if (unlikely(!skb)) {
- struct efx_rx_queue *rx_queue;
-
- rx_queue = efx_channel_get_rx_queue(channel);
- efx_free_rx_buffers(rx_queue, rx_buf, n_frags);
- return;
- }
-
- if (efx->net_dev->features & NETIF_F_RXHASH)
- skb_set_hash(skb, efx_rx_buf_hash(efx, eh),
- PKT_HASH_TYPE_L3);
- skb->ip_summed = ((rx_buf->flags & EFX_RX_PKT_CSUMMED) ?
- CHECKSUM_UNNECESSARY : CHECKSUM_NONE);
- skb->csum_level = !!(rx_buf->flags & EFX_RX_PKT_CSUM_LEVEL);
-
- for (;;) {
- skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
- rx_buf->page, rx_buf->page_offset,
- rx_buf->len);
- rx_buf->page = NULL;
- skb->len += rx_buf->len;
- if (skb_shinfo(skb)->nr_frags == n_frags)
- break;
-
- rx_buf = efx_rx_buf_next(&channel->rx_queue, rx_buf);
- }
-
- skb->data_len = skb->len;
- skb->truesize += n_frags * efx->rx_buffer_truesize;
-
- skb_record_rx_queue(skb, channel->rx_queue.core_index);
-
- napi_gro_frags(napi);
-}
-
/* Allocate and construct an SKB around page fragments */
static struct sk_buff *efx_rx_mk_skb(struct efx_channel *channel,
struct efx_rx_buffer *rx_buf,
@@ -583,28 +417,6 @@ out:
channel->rx_pkt_n_frags = 0;
}
-void efx_init_rx_recycle_ring(struct efx_rx_queue *rx_queue)
-{
- unsigned int bufs_in_recycle_ring, page_ring_size;
- struct efx_nic *efx = rx_queue->efx;
-
- /* Set the RX recycle ring size */
-#ifdef CONFIG_PPC64
- bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_IOMMU;
-#else
- if (iommu_present(&pci_bus_type))
- bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_IOMMU;
- else
- bufs_in_recycle_ring = EFX_RECYCLE_RING_SIZE_NOIOMMU;
-#endif /* CONFIG_PPC64 */
-
- page_ring_size = roundup_pow_of_two(bufs_in_recycle_ring /
- efx->rx_bufs_per_page);
- rx_queue->page_ring = kcalloc(page_ring_size,
- sizeof(*rx_queue->page_ring), GFP_KERNEL);
- rx_queue->page_ptr_mask = page_ring_size - 1;
-}
-
#ifdef CONFIG_RFS_ACCEL
static void efx_filter_rfs_work(struct work_struct *data)
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-02 14:18:16 +0300