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Diffstat (limited to 'target/linux/mediatek/patches-4.4/0079-net-next-fix-BQL-support.patch')
-rw-r--r--target/linux/mediatek/patches-4.4/0079-net-next-fix-BQL-support.patch90
1 files changed, 90 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.4/0079-net-next-fix-BQL-support.patch b/target/linux/mediatek/patches-4.4/0079-net-next-fix-BQL-support.patch
new file mode 100644
index 0000000..2999281
--- /dev/null
+++ b/target/linux/mediatek/patches-4.4/0079-net-next-fix-BQL-support.patch
@@ -0,0 +1,90 @@
+From f84a8ad5cc385fe414758fa4d423e26197a79c28 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sat, 23 Apr 2016 11:57:21 +0200
+Subject: [PATCH 79/91] net-next: fix BQL support
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/net/ethernet/mediatek/mtk_eth_soc.c | 33 +++++++++++++++------------
+ 1 file changed, 19 insertions(+), 14 deletions(-)
+
+diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+index bab5d45..ded09bc 100644
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -625,7 +625,15 @@ static int mtk_tx_map(struct sk_buff *skb, struct net_device *dev,
+ WRITE_ONCE(itxd->txd3, (TX_DMA_SWC | TX_DMA_PLEN0(skb_headlen(skb)) |
+ (!nr_frags * TX_DMA_LS0)));
+
+- netdev_sent_queue(dev, skb->len);
++ /* we have a single DMA ring so BQL needs to be updated for all devices
++ * sitting on this ring
++ */
++ for (i = 0; i < MTK_MAC_COUNT; i++) {
++ if (!eth->netdev[i])
++ continue;
++ netdev_sent_queue(dev, skb->len);
++ }
++
+ skb_tx_timestamp(skb);
+
+ ring->next_free = mtk_qdma_phys_to_virt(ring, txd->txd2);
+@@ -853,21 +861,18 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again)
+ struct mtk_tx_dma *desc;
+ struct sk_buff *skb;
+ struct mtk_tx_buf *tx_buf;
+- int total = 0, done[MTK_MAX_DEVS];
+- unsigned int bytes[MTK_MAX_DEVS];
++ int total = 0, done = 0;
++ unsigned int bytes = 0;
+ u32 cpu, dma;
+ static int condition;
+ int i;
+
+- memset(done, 0, sizeof(done));
+- memset(bytes, 0, sizeof(bytes));
+-
+ cpu = mtk_r32(eth, MTK_QTX_CRX_PTR);
+ dma = mtk_r32(eth, MTK_QTX_DRX_PTR);
+
+ desc = mtk_qdma_phys_to_virt(ring, cpu);
+
+- while ((cpu != dma) && budget) {
++ while ((cpu != dma) && done < budget) {
+ u32 next_cpu = desc->txd2;
+ int mac;
+
+@@ -887,9 +892,8 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again)
+ }
+
+ if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) {
+- bytes[mac] += skb->len;
+- done[mac]++;
+- budget--;
++ bytes += skb->len;
++ done++;
+ }
+ mtk_tx_unmap(eth->dev, tx_buf);
+
+@@ -902,13 +906,14 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again)
+
+ mtk_w32(eth, cpu, MTK_QTX_CRX_PTR);
+
++ /* we have a single DMA ring so BQL needs to be updated for all devices
++ * sitting on this ring
++ */
+ for (i = 0; i < MTK_MAC_COUNT; i++) {
+- if (!eth->netdev[i] || !done[i])
++ if (!eth->netdev[i])
+ continue;
+- netdev_completed_queue(eth->netdev[i], done[i], bytes[i]);
+- total += done[i];
++ netdev_completed_queue(eth->netdev[i], done, bytes);
+ }
+-
+ /* read hw index again make sure no new tx packet */
+ if (cpu != dma || cpu != mtk_r32(eth, MTK_QTX_DRX_PTR))
+ *tx_again = true;
+--
+1.7.10.4
+