diff options
Diffstat (limited to 'target/linux/generic/patches-4.0/072-06-bgmac-set-received-skb-headroom-to-NET_SKB_PAD.patch')
| -rw-r--r-- | target/linux/generic/patches-4.0/072-06-bgmac-set-received-skb-headroom-to-NET_SKB_PAD.patch | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/target/linux/generic/patches-4.0/072-06-bgmac-set-received-skb-headroom-to-NET_SKB_PAD.patch b/target/linux/generic/patches-4.0/072-06-bgmac-set-received-skb-headroom-to-NET_SKB_PAD.patch deleted file mode 100644 index 2c490efbbb..0000000000 --- a/target/linux/generic/patches-4.0/072-06-bgmac-set-received-skb-headroom-to-NET_SKB_PAD.patch +++ /dev/null @@ -1,66 +0,0 @@ -From: Felix Fietkau <nbd@openwrt.org> -Date: Sun, 12 Apr 2015 10:13:28 +0200 -Subject: [PATCH] bgmac: set received skb headroom to NET_SKB_PAD - -A packet buffer offset of 30 bytes is inefficient, because the first 2 -bytes end up in a different cacheline. - -Signed-off-by: Felix Fietkau <nbd@openwrt.org> ---- - ---- a/drivers/net/ethernet/broadcom/bgmac.c -+++ b/drivers/net/ethernet/broadcom/bgmac.c -@@ -346,13 +346,13 @@ static int bgmac_dma_rx_skb_for_slot(str - return -ENOMEM; - - /* Poison - if everything goes fine, hardware will overwrite it */ -- rx = buf; -+ rx = buf + BGMAC_RX_BUF_OFFSET; - rx->len = cpu_to_le16(0xdead); - rx->flags = cpu_to_le16(0xbeef); - - /* Map skb for the DMA */ -- dma_addr = dma_map_single(dma_dev, buf, BGMAC_RX_BUF_SIZE, -- DMA_FROM_DEVICE); -+ dma_addr = dma_map_single(dma_dev, buf + BGMAC_RX_BUF_OFFSET, -+ BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); - if (dma_mapping_error(dma_dev, dma_addr)) { - bgmac_err(bgmac, "DMA mapping error\n"); - put_page(virt_to_head_page(buf)); -@@ -403,7 +403,7 @@ static int bgmac_dma_rx_read(struct bgma - while (ring->start != ring->end) { - struct device *dma_dev = bgmac->core->dma_dev; - struct bgmac_slot_info *slot = &ring->slots[ring->start]; -- struct bgmac_rx_header *rx = slot->buf; -+ struct bgmac_rx_header *rx = slot->buf + BGMAC_RX_BUF_OFFSET; - struct sk_buff *skb; - void *buf = slot->buf; - u16 len, flags; -@@ -454,8 +454,10 @@ static int bgmac_dma_rx_read(struct bgma - BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); - - skb = build_skb(buf, BGMAC_RX_ALLOC_SIZE); -- skb_put(skb, BGMAC_RX_FRAME_OFFSET + len); -- skb_pull(skb, BGMAC_RX_FRAME_OFFSET); -+ skb_put(skb, BGMAC_RX_FRAME_OFFSET + -+ BGMAC_RX_BUF_OFFSET + len); -+ skb_pull(skb, BGMAC_RX_FRAME_OFFSET + -+ BGMAC_RX_BUF_OFFSET); - - skb_checksum_none_assert(skb); - skb->protocol = eth_type_trans(skb, bgmac->net_dev); ---- a/drivers/net/ethernet/broadcom/bgmac.h -+++ b/drivers/net/ethernet/broadcom/bgmac.h -@@ -360,9 +360,11 @@ - - #define BGMAC_RX_HEADER_LEN 28 /* Last 24 bytes are unused. Well... */ - #define BGMAC_RX_FRAME_OFFSET 30 /* There are 2 unused bytes between header and real data */ -+#define BGMAC_RX_BUF_OFFSET (NET_SKB_PAD + NET_IP_ALIGN - \ -+ BGMAC_RX_FRAME_OFFSET) - #define BGMAC_RX_MAX_FRAME_SIZE 1536 /* Copied from b44/tg3 */ - #define BGMAC_RX_BUF_SIZE (BGMAC_RX_FRAME_OFFSET + BGMAC_RX_MAX_FRAME_SIZE) --#define BGMAC_RX_ALLOC_SIZE (SKB_DATA_ALIGN(BGMAC_RX_BUF_SIZE) + \ -+#define BGMAC_RX_ALLOC_SIZE (SKB_DATA_ALIGN(BGMAC_RX_BUF_SIZE + BGMAC_RX_BUF_OFFSET) + \ - SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) - - #define BGMAC_BFL_ENETROBO 0x0010 /* has ephy roboswitch spi */ |