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https://github.com/openwrt/openwrt.git
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224 lines
6.6 KiB
Diff
224 lines
6.6 KiB
Diff
From 09f8d6960b69e474eef9d2aebdd0d536d00af0c8 Mon Sep 17 00:00:00 2001
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From: Srinivas Kandagatla <srinivas.kandagatla@st.com>
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Date: Thu, 16 Jan 2014 10:52:06 +0000
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Subject: [PATCH] net: stmmac: move dma allocation to new function
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This patch moves dma resource allocation to a new function
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alloc_dma_desc_resources, the reason for moving this to a new function
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is to keep the memory allocations in a separate function. One more reason
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it to get suspend and hibernation cases working without releasing and
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allocating these resources during suspend-resume and freeze-restore
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cases.
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Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
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Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 169 +++++++++++-----------
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1 file changed, 85 insertions(+), 84 deletions(-)
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diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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index 15192c0..532f2b4 100644
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--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@@ -996,66 +996,6 @@ static int init_dma_desc_rings(struct net_device *dev)
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pr_debug("%s: txsize %d, rxsize %d, bfsize %d\n", __func__,
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txsize, rxsize, bfsize);
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- if (priv->extend_desc) {
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- priv->dma_erx = dma_alloc_coherent(priv->device, rxsize *
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- sizeof(struct
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- dma_extended_desc),
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- &priv->dma_rx_phy,
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- GFP_KERNEL);
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- if (!priv->dma_erx)
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- goto err_dma;
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-
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- priv->dma_etx = dma_alloc_coherent(priv->device, txsize *
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- sizeof(struct
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- dma_extended_desc),
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- &priv->dma_tx_phy,
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- GFP_KERNEL);
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- if (!priv->dma_etx) {
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- dma_free_coherent(priv->device, priv->dma_rx_size *
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- sizeof(struct dma_extended_desc),
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- priv->dma_erx, priv->dma_rx_phy);
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- goto err_dma;
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- }
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- } else {
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- priv->dma_rx = dma_alloc_coherent(priv->device, rxsize *
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- sizeof(struct dma_desc),
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- &priv->dma_rx_phy,
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- GFP_KERNEL);
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- if (!priv->dma_rx)
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- goto err_dma;
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-
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- priv->dma_tx = dma_alloc_coherent(priv->device, txsize *
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- sizeof(struct dma_desc),
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- &priv->dma_tx_phy,
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- GFP_KERNEL);
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- if (!priv->dma_tx) {
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- dma_free_coherent(priv->device, priv->dma_rx_size *
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- sizeof(struct dma_desc),
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- priv->dma_rx, priv->dma_rx_phy);
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- goto err_dma;
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- }
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- }
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-
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- priv->rx_skbuff_dma = kmalloc_array(rxsize, sizeof(dma_addr_t),
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- GFP_KERNEL);
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- if (!priv->rx_skbuff_dma)
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- goto err_rx_skbuff_dma;
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-
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- priv->rx_skbuff = kmalloc_array(rxsize, sizeof(struct sk_buff *),
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- GFP_KERNEL);
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- if (!priv->rx_skbuff)
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- goto err_rx_skbuff;
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-
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- priv->tx_skbuff_dma = kmalloc_array(txsize, sizeof(dma_addr_t),
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- GFP_KERNEL);
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- if (!priv->tx_skbuff_dma)
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- goto err_tx_skbuff_dma;
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-
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- priv->tx_skbuff = kmalloc_array(txsize, sizeof(struct sk_buff *),
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- GFP_KERNEL);
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- if (!priv->tx_skbuff)
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- goto err_tx_skbuff;
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-
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if (netif_msg_probe(priv)) {
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pr_debug("(%s) dma_rx_phy=0x%08x dma_tx_phy=0x%08x\n", __func__,
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(u32) priv->dma_rx_phy, (u32) priv->dma_tx_phy);
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@@ -1123,30 +1063,6 @@ static int init_dma_desc_rings(struct net_device *dev)
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err_init_rx_buffers:
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while (--i >= 0)
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stmmac_free_rx_buffers(priv, i);
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- kfree(priv->tx_skbuff);
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-err_tx_skbuff:
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- kfree(priv->tx_skbuff_dma);
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-err_tx_skbuff_dma:
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- kfree(priv->rx_skbuff);
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-err_rx_skbuff:
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- kfree(priv->rx_skbuff_dma);
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-err_rx_skbuff_dma:
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- if (priv->extend_desc) {
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- dma_free_coherent(priv->device, priv->dma_tx_size *
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- sizeof(struct dma_extended_desc),
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- priv->dma_etx, priv->dma_tx_phy);
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- dma_free_coherent(priv->device, priv->dma_rx_size *
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- sizeof(struct dma_extended_desc),
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- priv->dma_erx, priv->dma_rx_phy);
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- } else {
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- dma_free_coherent(priv->device,
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- priv->dma_tx_size * sizeof(struct dma_desc),
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- priv->dma_tx, priv->dma_tx_phy);
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- dma_free_coherent(priv->device,
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- priv->dma_rx_size * sizeof(struct dma_desc),
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- priv->dma_rx, priv->dma_rx_phy);
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- }
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-err_dma:
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return ret;
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}
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@@ -1182,6 +1098,85 @@ static void dma_free_tx_skbufs(struct stmmac_priv *priv)
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}
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}
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+static int alloc_dma_desc_resources(struct stmmac_priv *priv)
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+{
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+ unsigned int txsize = priv->dma_tx_size;
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+ unsigned int rxsize = priv->dma_rx_size;
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+ int ret = -ENOMEM;
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+
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+ priv->rx_skbuff_dma = kmalloc_array(rxsize, sizeof(dma_addr_t),
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+ GFP_KERNEL);
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+ if (!priv->rx_skbuff_dma)
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+ return -ENOMEM;
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+
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+ priv->rx_skbuff = kmalloc_array(rxsize, sizeof(struct sk_buff *),
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+ GFP_KERNEL);
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+ if (!priv->rx_skbuff)
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+ goto err_rx_skbuff;
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+
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+ priv->tx_skbuff_dma = kmalloc_array(txsize, sizeof(dma_addr_t),
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+ GFP_KERNEL);
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+ if (!priv->tx_skbuff_dma)
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+ goto err_tx_skbuff_dma;
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+
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+ priv->tx_skbuff = kmalloc_array(txsize, sizeof(struct sk_buff *),
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+ GFP_KERNEL);
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+ if (!priv->tx_skbuff)
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+ goto err_tx_skbuff;
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+
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+ if (priv->extend_desc) {
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+ priv->dma_erx = dma_alloc_coherent(priv->device, rxsize *
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+ sizeof(struct
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+ dma_extended_desc),
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+ &priv->dma_rx_phy,
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+ GFP_KERNEL);
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+ if (!priv->dma_erx)
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+ goto err_dma;
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+
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+ priv->dma_etx = dma_alloc_coherent(priv->device, txsize *
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+ sizeof(struct
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+ dma_extended_desc),
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+ &priv->dma_tx_phy,
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+ GFP_KERNEL);
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+ if (!priv->dma_etx) {
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+ dma_free_coherent(priv->device, priv->dma_rx_size *
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+ sizeof(struct dma_extended_desc),
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+ priv->dma_erx, priv->dma_rx_phy);
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+ goto err_dma;
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+ }
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+ } else {
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+ priv->dma_rx = dma_alloc_coherent(priv->device, rxsize *
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+ sizeof(struct dma_desc),
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+ &priv->dma_rx_phy,
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+ GFP_KERNEL);
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+ if (!priv->dma_rx)
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+ goto err_dma;
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+
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+ priv->dma_tx = dma_alloc_coherent(priv->device, txsize *
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+ sizeof(struct dma_desc),
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+ &priv->dma_tx_phy,
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+ GFP_KERNEL);
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+ if (!priv->dma_tx) {
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+ dma_free_coherent(priv->device, priv->dma_rx_size *
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+ sizeof(struct dma_desc),
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+ priv->dma_rx, priv->dma_rx_phy);
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+ goto err_dma;
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+ }
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+ }
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+
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+ return 0;
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+
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+err_dma:
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+ kfree(priv->tx_skbuff);
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+err_tx_skbuff:
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+ kfree(priv->tx_skbuff_dma);
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+err_tx_skbuff_dma:
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+ kfree(priv->rx_skbuff);
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+err_rx_skbuff:
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+ kfree(priv->rx_skbuff_dma);
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+ return ret;
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+}
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+
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static void free_dma_desc_resources(struct stmmac_priv *priv)
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{
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/* Release the DMA TX/RX socket buffers */
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@@ -1623,6 +1618,12 @@ static int stmmac_open(struct net_device *dev)
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priv->dma_rx_size = STMMAC_ALIGN(dma_rxsize);
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priv->dma_buf_sz = STMMAC_ALIGN(buf_sz);
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+ alloc_dma_desc_resources(priv);
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+ if (ret < 0) {
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+ pr_err("%s: DMA descriptors allocation failed\n", __func__);
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+ goto dma_desc_error;
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+ }
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+
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ret = init_dma_desc_rings(dev);
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if (ret < 0) {
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pr_err("%s: DMA descriptors initialization failed\n", __func__);
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--
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1.8.5.5
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