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authorJosh Bendavid <joshbendavid@gmail.com>2016-06-15 02:56:36 +0200
committerJohn Crispin <john@phrozen.org>2016-06-14 13:28:41 +0200
commit9361285a41b8b1164f523dbd493042ae0b8e63d7 (patch)
treed3cd0a310cd777c53a95203d098a53f7a113de00 /target
parente13b6322cdbea9d7bdeed83fe04a5fd988b2f035 (diff)
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ipq806x: restore old stmmac dma patch which is still needed to fix data corruption
Signed-off-by: Josh Bendavid <joshbendavid@gmail.com>
Diffstat (limited to 'target')
-rw-r--r--target/linux/ipq806x/patches-4.4/711-stmmac-fix-ipq806x-DMA-configuration.patch117
1 files changed, 117 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-4.4/711-stmmac-fix-ipq806x-DMA-configuration.patch b/target/linux/ipq806x/patches-4.4/711-stmmac-fix-ipq806x-DMA-configuration.patch
new file mode 100644
index 0000000000..c99f60768f
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/711-stmmac-fix-ipq806x-DMA-configuration.patch
@@ -0,0 +1,117 @@
+--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
++++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
+@@ -259,6 +259,7 @@ static int ipq806x_gmac_probe(struct pla
+ {
+ struct plat_stmmacenet_data *plat_dat;
+ struct stmmac_resources stmmac_res;
++ struct stmmac_dma_cfg *dma_cfg;
+ struct device *dev = &pdev->dev;
+ struct ipq806x_gmac *gmac;
+ int val;
+@@ -348,6 +349,17 @@ static int ipq806x_gmac_probe(struct pla
+ plat_dat->bsp_priv = gmac;
+ plat_dat->fix_mac_speed = ipq806x_gmac_fix_mac_speed;
+
++ dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
++ GFP_KERNEL);
++
++ dma_cfg->pbl = 32;
++ dma_cfg->aal = 1;
++ dma_cfg->burst_len = DMA_AXI_BLEN_16 |
++ (7 << DMA_AXI_RD_OSR_LMT_SHIFT) |
++ (7 << DMA_AXI_WR_OSR_LMT_SHIFT);
++
++ plat_dat->dma_cfg = dma_cfg;
++
+ return stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+ }
+
+--- a/include/linux/stmmac.h
++++ b/include/linux/stmmac.h
+@@ -73,6 +73,9 @@
+ | DMA_AXI_BLEN_32 | DMA_AXI_BLEN_64 \
+ | DMA_AXI_BLEN_128 | DMA_AXI_BLEN_256)
+
++#define DMA_AXI_RD_OSR_LMT_SHIFT 16
++#define DMA_AXI_WR_OSR_LMT_SHIFT 20
++
+ /* Platfrom data for platform device structure's platform_data field */
+
+ struct stmmac_mdio_bus_data {
+@@ -88,6 +91,7 @@ struct stmmac_mdio_bus_data {
+
+ struct stmmac_dma_cfg {
+ int pbl;
++ int aal;
+ int fixed_burst;
+ int mixed_burst;
+ int burst_len;
+--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
++++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_dma.c
+@@ -31,7 +31,8 @@
+ #include "dwmac_dma.h"
+
+ static int dwmac1000_dma_init(void __iomem *ioaddr, int pbl, int fb, int mb,
+- int burst_len, u32 dma_tx, u32 dma_rx, int atds)
++ int burst_len, u32 dma_tx, u32 dma_rx, int atds,
++ int aal)
+ {
+ u32 value = readl(ioaddr + DMA_BUS_MODE);
+ int limit;
+@@ -62,6 +63,10 @@ static int dwmac1000_dma_init(void __iom
+ value = DMA_BUS_MODE_PBL | ((pbl << DMA_BUS_MODE_PBL_SHIFT) |
+ (pbl << DMA_BUS_MODE_RPBL_SHIFT));
+
++ /* Address Aligned Beats */
++ if (aal)
++ value |= DMA_BUS_MODE_AAL;
++
+ /* Set the Fixed burst mode */
+ if (fb)
+ value |= DMA_BUS_MODE_FB;
+--- a/drivers/net/ethernet/stmicro/stmmac/common.h
++++ b/drivers/net/ethernet/stmicro/stmmac/common.h
+@@ -352,7 +352,7 @@ extern const struct stmmac_desc_ops ndes
+ struct stmmac_dma_ops {
+ /* DMA core initialization */
+ int (*init) (void __iomem *ioaddr, int pbl, int fb, int mb,
+- int burst_len, u32 dma_tx, u32 dma_rx, int atds);
++ int burst_len, u32 dma_tx, u32 dma_rx, int atds, int aal);
+ /* Dump DMA registers */
+ void (*dump_regs) (void __iomem *ioaddr);
+ /* Set tx/rx threshold in the csr6 register
+--- a/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c
++++ b/drivers/net/ethernet/stmicro/stmmac/dwmac100_dma.c
+@@ -33,7 +33,8 @@
+ #include "dwmac_dma.h"
+
+ static int dwmac100_dma_init(void __iomem *ioaddr, int pbl, int fb, int mb,
+- int burst_len, u32 dma_tx, u32 dma_rx, int atds)
++ int burst_len, u32 dma_tx, u32 dma_rx, int atds,
++ int aal)
+ {
+ u32 value = readl(ioaddr + DMA_BUS_MODE);
+ int limit;
+--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
++++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+@@ -1639,9 +1639,11 @@ static int stmmac_init_dma_engine(struct
+ int pbl = DEFAULT_DMA_PBL, fixed_burst = 0, burst_len = 0;
+ int mixed_burst = 0;
+ int atds = 0;
++ int aal = 0;
+
+ if (priv->plat->dma_cfg) {
+ pbl = priv->plat->dma_cfg->pbl;
++ aal = priv->plat->dma_cfg->aal;
+ fixed_burst = priv->plat->dma_cfg->fixed_burst;
+ mixed_burst = priv->plat->dma_cfg->mixed_burst;
+ burst_len = priv->plat->dma_cfg->burst_len;
+@@ -1652,7 +1654,7 @@ static int stmmac_init_dma_engine(struct
+
+ return priv->hw->dma->init(priv->ioaddr, pbl, fixed_burst, mixed_burst,
+ burst_len, priv->dma_tx_phy,
+- priv->dma_rx_phy, atds);
++ priv->dma_rx_phy, atds, aal);
+ }
+
+ /**