summaryrefslogtreecommitdiff
path: root/target/linux/sunxi/patches-3.13/151-3-stmmac-fixup-3.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/sunxi/patches-3.13/151-3-stmmac-fixup-3.patch')
-rw-r--r--target/linux/sunxi/patches-3.13/151-3-stmmac-fixup-3.patch223
1 files changed, 223 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.13/151-3-stmmac-fixup-3.patch b/target/linux/sunxi/patches-3.13/151-3-stmmac-fixup-3.patch
new file mode 100644
index 0000000..d9c843a
--- /dev/null
+++ b/target/linux/sunxi/patches-3.13/151-3-stmmac-fixup-3.patch
@@ -0,0 +1,223 @@
+From 09f8d6960b69e474eef9d2aebdd0d536d00af0c8 Mon Sep 17 00:00:00 2001
+From: Srinivas Kandagatla <srinivas.kandagatla@st.com>
+Date: Thu, 16 Jan 2014 10:52:06 +0000
+Subject: [PATCH] net: stmmac: move dma allocation to new function
+
+This patch moves dma resource allocation to a new function
+alloc_dma_desc_resources, the reason for moving this to a new function
+is to keep the memory allocations in a separate function. One more reason
+it to get suspend and hibernation cases working without releasing and
+allocating these resources during suspend-resume and freeze-restore
+cases.
+
+Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
+Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 169 +++++++++++-----------
+ 1 file changed, 85 insertions(+), 84 deletions(-)
+
+diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+index 15192c0..532f2b4 100644
+--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
++++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+@@ -996,66 +996,6 @@ static int init_dma_desc_rings(struct net_device *dev)
+ pr_debug("%s: txsize %d, rxsize %d, bfsize %d\n", __func__,
+ txsize, rxsize, bfsize);
+
+- if (priv->extend_desc) {
+- priv->dma_erx = dma_alloc_coherent(priv->device, rxsize *
+- sizeof(struct
+- dma_extended_desc),
+- &priv->dma_rx_phy,
+- GFP_KERNEL);
+- if (!priv->dma_erx)
+- goto err_dma;
+-
+- priv->dma_etx = dma_alloc_coherent(priv->device, txsize *
+- sizeof(struct
+- dma_extended_desc),
+- &priv->dma_tx_phy,
+- GFP_KERNEL);
+- if (!priv->dma_etx) {
+- dma_free_coherent(priv->device, priv->dma_rx_size *
+- sizeof(struct dma_extended_desc),
+- priv->dma_erx, priv->dma_rx_phy);
+- goto err_dma;
+- }
+- } else {
+- priv->dma_rx = dma_alloc_coherent(priv->device, rxsize *
+- sizeof(struct dma_desc),
+- &priv->dma_rx_phy,
+- GFP_KERNEL);
+- if (!priv->dma_rx)
+- goto err_dma;
+-
+- priv->dma_tx = dma_alloc_coherent(priv->device, txsize *
+- sizeof(struct dma_desc),
+- &priv->dma_tx_phy,
+- GFP_KERNEL);
+- if (!priv->dma_tx) {
+- dma_free_coherent(priv->device, priv->dma_rx_size *
+- sizeof(struct dma_desc),
+- priv->dma_rx, priv->dma_rx_phy);
+- goto err_dma;
+- }
+- }
+-
+- priv->rx_skbuff_dma = kmalloc_array(rxsize, sizeof(dma_addr_t),
+- GFP_KERNEL);
+- if (!priv->rx_skbuff_dma)
+- goto err_rx_skbuff_dma;
+-
+- priv->rx_skbuff = kmalloc_array(rxsize, sizeof(struct sk_buff *),
+- GFP_KERNEL);
+- if (!priv->rx_skbuff)
+- goto err_rx_skbuff;
+-
+- priv->tx_skbuff_dma = kmalloc_array(txsize, sizeof(dma_addr_t),
+- GFP_KERNEL);
+- if (!priv->tx_skbuff_dma)
+- goto err_tx_skbuff_dma;
+-
+- priv->tx_skbuff = kmalloc_array(txsize, sizeof(struct sk_buff *),
+- GFP_KERNEL);
+- if (!priv->tx_skbuff)
+- goto err_tx_skbuff;
+-
+ if (netif_msg_probe(priv)) {
+ pr_debug("(%s) dma_rx_phy=0x%08x dma_tx_phy=0x%08x\n", __func__,
+ (u32) priv->dma_rx_phy, (u32) priv->dma_tx_phy);
+@@ -1123,30 +1063,6 @@ static int init_dma_desc_rings(struct net_device *dev)
+ err_init_rx_buffers:
+ while (--i >= 0)
+ stmmac_free_rx_buffers(priv, i);
+- kfree(priv->tx_skbuff);
+-err_tx_skbuff:
+- kfree(priv->tx_skbuff_dma);
+-err_tx_skbuff_dma:
+- kfree(priv->rx_skbuff);
+-err_rx_skbuff:
+- kfree(priv->rx_skbuff_dma);
+-err_rx_skbuff_dma:
+- if (priv->extend_desc) {
+- dma_free_coherent(priv->device, priv->dma_tx_size *
+- sizeof(struct dma_extended_desc),
+- priv->dma_etx, priv->dma_tx_phy);
+- dma_free_coherent(priv->device, priv->dma_rx_size *
+- sizeof(struct dma_extended_desc),
+- priv->dma_erx, priv->dma_rx_phy);
+- } else {
+- dma_free_coherent(priv->device,
+- priv->dma_tx_size * sizeof(struct dma_desc),
+- priv->dma_tx, priv->dma_tx_phy);
+- dma_free_coherent(priv->device,
+- priv->dma_rx_size * sizeof(struct dma_desc),
+- priv->dma_rx, priv->dma_rx_phy);
+- }
+-err_dma:
+ return ret;
+ }
+
+@@ -1182,6 +1098,85 @@ static void dma_free_tx_skbufs(struct stmmac_priv *priv)
+ }
+ }
+
++static int alloc_dma_desc_resources(struct stmmac_priv *priv)
++{
++ unsigned int txsize = priv->dma_tx_size;
++ unsigned int rxsize = priv->dma_rx_size;
++ int ret = -ENOMEM;
++
++ priv->rx_skbuff_dma = kmalloc_array(rxsize, sizeof(dma_addr_t),
++ GFP_KERNEL);
++ if (!priv->rx_skbuff_dma)
++ return -ENOMEM;
++
++ priv->rx_skbuff = kmalloc_array(rxsize, sizeof(struct sk_buff *),
++ GFP_KERNEL);
++ if (!priv->rx_skbuff)
++ goto err_rx_skbuff;
++
++ priv->tx_skbuff_dma = kmalloc_array(txsize, sizeof(dma_addr_t),
++ GFP_KERNEL);
++ if (!priv->tx_skbuff_dma)
++ goto err_tx_skbuff_dma;
++
++ priv->tx_skbuff = kmalloc_array(txsize, sizeof(struct sk_buff *),
++ GFP_KERNEL);
++ if (!priv->tx_skbuff)
++ goto err_tx_skbuff;
++
++ if (priv->extend_desc) {
++ priv->dma_erx = dma_alloc_coherent(priv->device, rxsize *
++ sizeof(struct
++ dma_extended_desc),
++ &priv->dma_rx_phy,
++ GFP_KERNEL);
++ if (!priv->dma_erx)
++ goto err_dma;
++
++ priv->dma_etx = dma_alloc_coherent(priv->device, txsize *
++ sizeof(struct
++ dma_extended_desc),
++ &priv->dma_tx_phy,
++ GFP_KERNEL);
++ if (!priv->dma_etx) {
++ dma_free_coherent(priv->device, priv->dma_rx_size *
++ sizeof(struct dma_extended_desc),
++ priv->dma_erx, priv->dma_rx_phy);
++ goto err_dma;
++ }
++ } else {
++ priv->dma_rx = dma_alloc_coherent(priv->device, rxsize *
++ sizeof(struct dma_desc),
++ &priv->dma_rx_phy,
++ GFP_KERNEL);
++ if (!priv->dma_rx)
++ goto err_dma;
++
++ priv->dma_tx = dma_alloc_coherent(priv->device, txsize *
++ sizeof(struct dma_desc),
++ &priv->dma_tx_phy,
++ GFP_KERNEL);
++ if (!priv->dma_tx) {
++ dma_free_coherent(priv->device, priv->dma_rx_size *
++ sizeof(struct dma_desc),
++ priv->dma_rx, priv->dma_rx_phy);
++ goto err_dma;
++ }
++ }
++
++ return 0;
++
++err_dma:
++ kfree(priv->tx_skbuff);
++err_tx_skbuff:
++ kfree(priv->tx_skbuff_dma);
++err_tx_skbuff_dma:
++ kfree(priv->rx_skbuff);
++err_rx_skbuff:
++ kfree(priv->rx_skbuff_dma);
++ return ret;
++}
++
+ static void free_dma_desc_resources(struct stmmac_priv *priv)
+ {
+ /* Release the DMA TX/RX socket buffers */
+@@ -1623,6 +1618,12 @@ static int stmmac_open(struct net_device *dev)
+ priv->dma_rx_size = STMMAC_ALIGN(dma_rxsize);
+ priv->dma_buf_sz = STMMAC_ALIGN(buf_sz);
+
++ alloc_dma_desc_resources(priv);
++ if (ret < 0) {
++ pr_err("%s: DMA descriptors allocation failed\n", __func__);
++ goto dma_desc_error;
++ }
++
+ ret = init_dma_desc_rings(dev);
+ if (ret < 0) {
+ pr_err("%s: DMA descriptors initialization failed\n", __func__);
+--
+1.8.5.5
+
generated by cgit v1.1 at 2024-12-15 16:53:50 +0000