mediatek: update patches

[openwrt.git] / target / linux / mediatek / patches-4.4 / 0079-net-next-fix-BQL-support.patch

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 (file)
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
+