diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-3.3/423-bcm63xx_enet-fix-lockup-on-BCM6328.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-3.3/423-bcm63xx_enet-fix-lockup-on-BCM6328.patch | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-3.3/423-bcm63xx_enet-fix-lockup-on-BCM6328.patch b/target/linux/brcm63xx/patches-3.3/423-bcm63xx_enet-fix-lockup-on-BCM6328.patch new file mode 100644 index 000000000..4306ce753 --- /dev/null +++ b/target/linux/brcm63xx/patches-3.3/423-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 __devinit bcm_enet_probe(stru + 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 __devinit bcm_enetsw_probe(st + 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 +@@ -17,6 +17,7 @@ + + /* 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 +@@ -280,6 +281,9 @@ 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; + |