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1d6f422e34
Sync ethernet driver code with upstream Linux kernel: -Reduce xmit_more code changes. -Combine rx cleanup code into a function. -Convert to build_skb. -Improve rx loop by optimizing loop tracking. https://lore.kernel.org/netdev/20210106144208.1935-1-liew.s.piaw@gmail.com/ Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com> [Amend commit description, move patches to the top since they are going to be upstreamed] Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
143 lines
3.8 KiB
Diff
143 lines
3.8 KiB
Diff
From 3d0b72654b0c8304424503e7560ee8635dd56340 Mon Sep 17 00:00:00 2001
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From: Sieng Piaw Liew <liew.s.piaw@gmail.com>
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Date: Wed, 6 Jan 2021 22:42:06 +0800
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Subject: [PATCH 5/7] bcm63xx_enet: consolidate rx SKB ring cleanup code
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The rx SKB ring use the same code for cleanup at various points.
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Combine them into a function to reduce lines of code.
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Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com>
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Acked-by: Florian Fainelli <f.fainelli@gmail.com>
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/ethernet/broadcom/bcm63xx_enet.c | 72 ++++++--------------
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1 file changed, 22 insertions(+), 50 deletions(-)
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--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
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+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
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@@ -861,6 +861,24 @@ static void bcm_enet_adjust_link(struct
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priv->pause_tx ? "tx" : "off");
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}
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+static void bcm_enet_free_rx_skb_ring(struct device *kdev, struct bcm_enet_priv *priv)
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+{
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+ int i;
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+
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+ for (i = 0; i < priv->rx_ring_size; i++) {
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+ struct bcm_enet_desc *desc;
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+
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+ if (!priv->rx_skb[i])
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+ continue;
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+
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+ desc = &priv->rx_desc_cpu[i];
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+ dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
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+ DMA_FROM_DEVICE);
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+ kfree_skb(priv->rx_skb[i]);
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+ }
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+ kfree(priv->rx_skb);
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+}
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+
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/*
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* open callback, allocate dma rings & buffers and start rx operation
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*/
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@@ -1085,18 +1103,7 @@ static int bcm_enet_open(struct net_devi
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return 0;
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out:
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- for (i = 0; i < priv->rx_ring_size; i++) {
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- struct bcm_enet_desc *desc;
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-
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- if (!priv->rx_skb[i])
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- continue;
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-
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- desc = &priv->rx_desc_cpu[i];
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- dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
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- DMA_FROM_DEVICE);
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- kfree_skb(priv->rx_skb[i]);
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- }
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- kfree(priv->rx_skb);
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+ bcm_enet_free_rx_skb_ring(kdev, priv);
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out_free_tx_skb:
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kfree(priv->tx_skb);
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@@ -1175,7 +1182,6 @@ static int bcm_enet_stop(struct net_devi
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{
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struct bcm_enet_priv *priv;
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struct device *kdev;
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- int i;
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priv = netdev_priv(dev);
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kdev = &priv->pdev->dev;
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@@ -1204,20 +1210,9 @@ static int bcm_enet_stop(struct net_devi
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bcm_enet_tx_reclaim(dev, 1);
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/* free the rx skb ring */
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- for (i = 0; i < priv->rx_ring_size; i++) {
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- struct bcm_enet_desc *desc;
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-
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- if (!priv->rx_skb[i])
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- continue;
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-
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- desc = &priv->rx_desc_cpu[i];
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- dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
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- DMA_FROM_DEVICE);
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- kfree_skb(priv->rx_skb[i]);
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- }
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+ bcm_enet_free_rx_skb_ring(kdev, priv);
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/* free remaining allocated memory */
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- kfree(priv->rx_skb);
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kfree(priv->tx_skb);
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dma_free_coherent(kdev, priv->rx_desc_alloc_size,
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priv->rx_desc_cpu, priv->rx_desc_dma);
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@@ -2308,18 +2303,7 @@ static int bcm_enetsw_open(struct net_de
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return 0;
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out:
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- for (i = 0; i < priv->rx_ring_size; i++) {
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- struct bcm_enet_desc *desc;
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-
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- if (!priv->rx_skb[i])
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- continue;
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-
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- desc = &priv->rx_desc_cpu[i];
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- dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
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- DMA_FROM_DEVICE);
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- kfree_skb(priv->rx_skb[i]);
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- }
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- kfree(priv->rx_skb);
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+ bcm_enet_free_rx_skb_ring(kdev, priv);
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out_free_tx_skb:
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kfree(priv->tx_skb);
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@@ -2348,7 +2332,6 @@ static int bcm_enetsw_stop(struct net_de
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{
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struct bcm_enet_priv *priv;
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struct device *kdev;
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- int i;
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priv = netdev_priv(dev);
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kdev = &priv->pdev->dev;
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@@ -2371,20 +2354,9 @@ static int bcm_enetsw_stop(struct net_de
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bcm_enet_tx_reclaim(dev, 1);
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/* free the rx skb ring */
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- for (i = 0; i < priv->rx_ring_size; i++) {
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- struct bcm_enet_desc *desc;
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-
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- if (!priv->rx_skb[i])
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- continue;
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-
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- desc = &priv->rx_desc_cpu[i];
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- dma_unmap_single(kdev, desc->address, priv->rx_skb_size,
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- DMA_FROM_DEVICE);
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- kfree_skb(priv->rx_skb[i]);
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- }
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+ bcm_enet_free_rx_skb_ring(kdev, priv);
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/* free remaining allocated memory */
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- kfree(priv->rx_skb);
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kfree(priv->tx_skb);
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dma_free_coherent(kdev, priv->rx_desc_alloc_size,
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priv->rx_desc_cpu, priv->rx_desc_dma);
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