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ARM: EXYNOS: Set 64-bit DMA mask for EXYNOS5250

PATCH New Tushar Behera 2 participants 5 messages Aug 9, 2013

Subsystems (3)
Arm (32-bit) Arm sub-architectures Arm Samsung Exynos
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Tushar Behera

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#0 lore raw

PATCH 1/1 ARM: EXYNOS: Set 64-bit DMA mask for EXYNOS5250

When LPAE is enabled, we need to set 64bit DMA mask bits.

Signed-off-by Tushar Behera <[email protected]>

---
Based on v3.11-rc4.

 arch/arm/mach-exynos/mach-exynos5-dt.c |   26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
arch/arm/mach-exynos/mach-exynos5-dt.c +26 -0
index f874b77..2217631 100644
@@ -14,6 +14,7 @@
 #include <linux/memblock.h>
 #include <linux/io.h>
 #include <linux/clocksource.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/mach/arch.h>
 #include <mach/regs-pmu.h>

@@ -23,6 +24,26 @@
 
 #include "common.h"
 
+static u64 dma_mask64 = DMA_BIT_MASK(64);
+
+static int exynos5250_platform_notifier(struct notifier_block *nb,
+				  unsigned long event, void *__dev)
+{
+	struct device *dev = __dev;
+
+	if (event != BUS_NOTIFY_ADD_DEVICE)
+		return NOTIFY_DONE;
+
+	dev->dma_mask = &dma_mask64;
+	dev->coherent_dma_mask = DMA_BIT_MASK(64);
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block exynos5250_platform_nb = {
+	.notifier_call = exynos5250_platform_notifier,
+};
+
 static void __init exynos5_dt_machine_init(void)
 {
 	struct device_node *i2c_np;

@@ -47,6 +68,11 @@ static void __init exynos5_dt_machine_init(void)
 		}
 	}
 
+	if (config_enabled(CONFIG_ARM_LPAE) &&
+			of_machine_is_compatible("samsung,exynos5250"))
+		bus_register_notifier(&platform_bus_type,
+				&exynos5250_platform_nb);
+
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }
Signature · 1 line
1.7.9.5
#1 lore raw

PATCH 1/1 ARM: EXYNOS: Set 64-bit DMA mask for EXYNOS5250

Quoted 1 line · Tushar Behera

When LPAE is enabled, we need to set 64bit DMA mask bits.

*Please* check the list archives. I sent during the last 7 days a patch series which should address this problem. Unfortunately, it seems almost no one has looked at it.

author
#2 lore raw

PATCH 1/1 ARM: EXYNOS: Set 64-bit DMA mask for EXYNOS5250

Quoted 6 lines · Russell King - ARM Linux
Quoted 1 line · Tushar Behera

When LPAE is enabled, we need to set 64bit DMA mask bits.

*Please* check the list archives. I sent during the last 7 days a patch series which should address this problem. Unfortunately, it seems almost no one has looked at it.

Thanks for the patchset. Tested on Arndale.

Signature · 1 line
Tushar Behera
#3 lore raw

PATCH 1/1 ARM: EXYNOS: Set 64-bit DMA mask for EXYNOS5250

Quoted 9 lines · Tushar Behera
Quoted 6 lines · Russell King - ARM Linux
Quoted 1 line · Tushar Behera

When LPAE is enabled, we need to set 64bit DMA mask bits.

*Please* check the list archives. I sent during the last 7 days a patch series which should address this problem. Unfortunately, it seems almost no one has looked at it.

Thanks for the patchset. Tested on Arndale.

Thanks - can I assume that's a proper Tested-by: ? Also, please confirm the patch numbers which you tested. Thanks.

author
#4 lore raw

PATCH 1/1 ARM: EXYNOS: Set 64-bit DMA mask for EXYNOS5250

Quoted 5 lines · Russell King - ARM Linux
Quoted 4 lines · Tushar Behera
Quoted 3 lines · Russell King - ARM Linux
Quoted 1 line · Tushar Behera

When LPAE is enabled, we need to set 64bit DMA mask bits.

Quoted 8 lines
Quoted 5 lines
Quoted 3 lines

*Please* check the list archives. I sent during the last 7 days a patch series which should address this problem. Unfortunately, it seems almost no one has looked at it.

Thanks for the patchset. Tested on Arndale.

Thanks - can I assume that's a proper Tested-by: ? Also, please confirm the patch numbers which you tested. Thanks.

Replied to [PATCH 46/51] with a Tested-by.

Signature · 1 line
Tushar Behera