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Diffstat (limited to 'target/linux/brcm63xx/patches-3.8/423-bcm63xx_enet-fix-lockup-on-BCM6328.patch')
-rw-r--r--target/linux/brcm63xx/patches-3.8/423-bcm63xx_enet-fix-lockup-on-BCM6328.patch93
1 files changed, 93 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-3.8/423-bcm63xx_enet-fix-lockup-on-BCM6328.patch b/target/linux/brcm63xx/patches-3.8/423-bcm63xx_enet-fix-lockup-on-BCM6328.patch
new file mode 100644
index 0000000000..1611d576e6
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.8/423-bcm63xx_enet-fix-lockup-on-BCM6328.patch
@@ -0,0 +1,93 @@
+From 382a0b0dc4cbd0e0fbfd6c2d132e972c3d1245b0 Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski@gmail.com>
+Date: Sun, 13 Nov 2011 14:59:37 +0100
+Subject: [PATCH 39/84] bcm63xx_enet: fix lockup on BCM6328
+
+BCM6328 locks up on a maxburst size of 16, reduce it to 8 for BCM6328 and
+BCM6368.
+
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+---
+ drivers/net/ethernet/broadcom/bcm63xx_enet.c | 13 +++++++------
+ drivers/net/ethernet/broadcom/bcm63xx_enet.h | 4 ++++
+ 2 files changed, 11 insertions(+), 6 deletions(-)
+
+--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
++++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+@@ -261,7 +261,6 @@ static int bcm_enet_refill_rx(struct net
+ if (!skb)
+ break;
+ priv->rx_skb[desc_idx] = skb;
+-
+ p = dma_map_single(&priv->pdev->dev, skb->data,
+ priv->rx_skb_size,
+ DMA_FROM_DEVICE);
+@@ -995,9 +994,9 @@ static int bcm_enet_open(struct net_devi
+ enet_writel(priv, priv->hw_mtu, ENET_TXMAXLEN_REG);
+
+ /* set dma maximum burst len */
+- enet_dmac_writel(priv, BCMENET_DMA_MAXBURST,
++ enet_dmac_writel(priv, priv->dma_maxburst,
+ ENETDMAC_MAXBURST_REG(priv->rx_chan));
+- enet_dmac_writel(priv, BCMENET_DMA_MAXBURST,
++ enet_dmac_writel(priv, priv->dma_maxburst,
+ ENETDMAC_MAXBURST_REG(priv->tx_chan));
+
+ /* set correct transmit fifo watermark */
+@@ -1593,7 +1592,7 @@ static int compute_hw_mtu(struct bcm_ene
+ * it's appended
+ */
+ priv->rx_skb_size = ALIGN(actual_mtu + ETH_FCS_LEN,
+- BCMENET_DMA_MAXBURST * 4);
++ priv->dma_maxburst * 4);
+ return 0;
+ }
+
+@@ -1701,6 +1700,7 @@ static int bcm_enet_probe(struct platfor
+ priv = netdev_priv(dev);
+
+ priv->enet_is_sw = false;
++ priv->dma_maxburst = BCMENET_DMA_MAXBURST;
+
+ ret = compute_hw_mtu(priv, dev->mtu);
+ if (ret)
+@@ -2282,9 +2282,9 @@ static int bcm_enetsw_open(struct net_de
+ enet_dmas_writel(priv, 0, ENETDMAS_SRAM4_REG(priv->tx_chan));
+
+ /* set dma maximum burst len */
+- enet_dmac_writel(priv, BCMENET_DMA_MAXBURST,
++ enet_dmac_writel(priv, priv->dma_maxburst,
+ ENETDMAC_MAXBURST_REG(priv->rx_chan));
+- enet_dmac_writel(priv, BCMENET_DMA_MAXBURST,
++ enet_dmac_writel(priv, priv->dma_maxburst,
+ ENETDMAC_MAXBURST_REG(priv->tx_chan));
+
+ /* set flow control low/high threshold to 1/3 / 2/3 */
+@@ -2749,6 +2749,7 @@ static int bcm_enetsw_probe(struct platf
+ priv->irq_tx = irq_tx;
+ priv->rx_ring_size = BCMENET_DEF_RX_DESC;
+ priv->tx_ring_size = BCMENET_DEF_TX_DESC;
++ priv->dma_maxburst = BCMENETSW_DMA_MAXBURST;
+
+ pd = pdev->dev.platform_data;
+ if (pd) {
+--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.h
++++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.h
+@@ -18,6 +18,7 @@
+
+ /* maximum burst len for dma (4 bytes unit) */
+ #define BCMENET_DMA_MAXBURST 16
++#define BCMENETSW_DMA_MAXBURST 8
+
+ /* tx transmit threshold (4 bytes unit), fifo is 256 bytes, the value
+ * must be low enough so that a DMA transfer of above burst length can
+@@ -252,6 +253,9 @@ struct bcm_enet_priv {
+ /* number of dma desc in tx ring */
+ int tx_ring_size;
+
++ /* maximum dma burst size */
++ int dma_maxburst;
++
+ /* cpu view of rx dma ring */
+ struct bcm_enet_desc *tx_desc_cpu;
+