diff options
Diffstat (limited to 'target/linux/generic/patches-3.18/077-02-bgmac-implement-GRO-and-use-build_skb.patch')
| -rw-r--r-- | target/linux/generic/patches-3.18/077-02-bgmac-implement-GRO-and-use-build_skb.patch | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/077-02-bgmac-implement-GRO-and-use-build_skb.patch b/target/linux/generic/patches-3.18/077-02-bgmac-implement-GRO-and-use-build_skb.patch new file mode 100644 index 0000000000..3636fb619a --- /dev/null +++ b/target/linux/generic/patches-3.18/077-02-bgmac-implement-GRO-and-use-build_skb.patch @@ -0,0 +1,189 @@ +From: Felix Fietkau <nbd@openwrt.org> +Date: Mon, 23 Mar 2015 02:41:25 +0100 +Subject: [PATCH] bgmac: implement GRO and use build_skb + +This improves performance for routing and local rx + +Signed-off-by: Felix Fietkau <nbd@openwrt.org> +--- + +--- a/drivers/net/ethernet/broadcom/bgmac.c ++++ b/drivers/net/ethernet/broadcom/bgmac.c +@@ -276,31 +276,31 @@ static int bgmac_dma_rx_skb_for_slot(str + struct bgmac_slot_info *slot) + { + struct device *dma_dev = bgmac->core->dma_dev; +- struct sk_buff *skb; + dma_addr_t dma_addr; + struct bgmac_rx_header *rx; ++ void *buf; + + /* Alloc skb */ +- skb = netdev_alloc_skb(bgmac->net_dev, BGMAC_RX_BUF_SIZE); +- if (!skb) ++ buf = netdev_alloc_frag(BGMAC_RX_ALLOC_SIZE); ++ if (!buf) + return -ENOMEM; + + /* Poison - if everything goes fine, hardware will overwrite it */ +- rx = (struct bgmac_rx_header *)skb->data; ++ rx = buf; + rx->len = cpu_to_le16(0xdead); + rx->flags = cpu_to_le16(0xbeef); + + /* Map skb for the DMA */ +- dma_addr = dma_map_single(dma_dev, skb->data, +- BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); ++ dma_addr = dma_map_single(dma_dev, buf, BGMAC_RX_BUF_SIZE, ++ DMA_FROM_DEVICE); + if (dma_mapping_error(dma_dev, dma_addr)) { + bgmac_err(bgmac, "DMA mapping error\n"); +- dev_kfree_skb(skb); ++ put_page(virt_to_head_page(buf)); + return -ENOMEM; + } + + /* Update the slot */ +- slot->skb = skb; ++ slot->buf = buf; + slot->dma_addr = dma_addr; + + return 0; +@@ -343,8 +343,9 @@ 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 sk_buff *skb = slot->skb; +- struct bgmac_rx_header *rx; ++ struct bgmac_rx_header *rx = slot->buf; ++ struct sk_buff *skb; ++ void *buf = slot->buf; + u16 len, flags; + + /* Unmap buffer to make it accessible to the CPU */ +@@ -352,7 +353,6 @@ static int bgmac_dma_rx_read(struct bgma + BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE); + + /* Get info from the header */ +- rx = (struct bgmac_rx_header *)skb->data; + len = le16_to_cpu(rx->len); + flags = le16_to_cpu(rx->flags); + +@@ -393,12 +393,13 @@ static int bgmac_dma_rx_read(struct bgma + dma_unmap_single(dma_dev, old_dma_addr, + 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_checksum_none_assert(skb); + skb->protocol = eth_type_trans(skb, bgmac->net_dev); +- netif_receive_skb(skb); ++ napi_gro_receive(&bgmac->napi, skb); + handled++; + } while (0); + +@@ -434,12 +435,11 @@ static bool bgmac_dma_unaligned(struct b + return false; + } + +-static void bgmac_dma_ring_free(struct bgmac *bgmac, +- struct bgmac_dma_ring *ring) ++static void bgmac_dma_tx_ring_free(struct bgmac *bgmac, ++ struct bgmac_dma_ring *ring) + { + struct device *dma_dev = bgmac->core->dma_dev; + struct bgmac_slot_info *slot; +- int size; + int i; + + for (i = 0; i < ring->num_slots; i++) { +@@ -451,23 +451,55 @@ static void bgmac_dma_ring_free(struct b + dev_kfree_skb(slot->skb); + } + } ++} + +- if (ring->cpu_base) { +- /* Free ring of descriptors */ +- size = ring->num_slots * sizeof(struct bgmac_dma_desc); +- dma_free_coherent(dma_dev, size, ring->cpu_base, +- ring->dma_base); ++static void bgmac_dma_rx_ring_free(struct bgmac *bgmac, ++ struct bgmac_dma_ring *ring) ++{ ++ struct device *dma_dev = bgmac->core->dma_dev; ++ struct bgmac_slot_info *slot; ++ int i; ++ ++ for (i = 0; i < ring->num_slots; i++) { ++ slot = &ring->slots[i]; ++ if (!slot->buf) ++ continue; ++ ++ if (slot->dma_addr) ++ dma_unmap_single(dma_dev, slot->dma_addr, ++ BGMAC_RX_BUF_SIZE, ++ DMA_FROM_DEVICE); ++ put_page(virt_to_head_page(slot->buf)); + } + } + ++static void bgmac_dma_ring_desc_free(struct bgmac *bgmac, ++ struct bgmac_dma_ring *ring) ++{ ++ struct device *dma_dev = bgmac->core->dma_dev; ++ int size; ++ ++ if (!ring->cpu_base) ++ return; ++ ++ /* Free ring of descriptors */ ++ size = ring->num_slots * sizeof(struct bgmac_dma_desc); ++ dma_free_coherent(dma_dev, size, ring->cpu_base, ++ ring->dma_base); ++} ++ + static void bgmac_dma_free(struct bgmac *bgmac) + { + int i; + +- for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) +- bgmac_dma_ring_free(bgmac, &bgmac->tx_ring[i]); +- for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) +- bgmac_dma_ring_free(bgmac, &bgmac->rx_ring[i]); ++ for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) { ++ bgmac_dma_tx_ring_free(bgmac, &bgmac->tx_ring[i]); ++ bgmac_dma_ring_desc_free(bgmac, &bgmac->tx_ring[i]); ++ } ++ for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) { ++ bgmac_dma_rx_ring_free(bgmac, &bgmac->rx_ring[i]); ++ bgmac_dma_ring_desc_free(bgmac, &bgmac->rx_ring[i]); ++ } + } + + static int bgmac_dma_alloc(struct bgmac *bgmac) +--- a/drivers/net/ethernet/broadcom/bgmac.h ++++ b/drivers/net/ethernet/broadcom/bgmac.h +@@ -362,6 +362,8 @@ + #define BGMAC_RX_FRAME_OFFSET 30 /* There are 2 unused bytes between header and real data */ + #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) + \ ++ SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) + + #define BGMAC_BFL_ENETROBO 0x0010 /* has ephy roboswitch spi */ + #define BGMAC_BFL_ENETADM 0x0080 /* has ADMtek switch */ +@@ -383,7 +385,10 @@ + #define ETHER_MAX_LEN 1518 + + struct bgmac_slot_info { +- struct sk_buff *skb; ++ union { ++ struct sk_buff *skb; ++ void *buf; ++ }; + dma_addr_t dma_addr; + }; + |