---

yaml --- r: 308043 b: refs/heads/master c: 4ce63fc h: refs/heads/master i: 308041: 5e8a0ec 308039: ea8ad31 v: v3
git-mirror · May 21, 2012 · 714b991 · 714b991
1 parent f9458b8
commit 714b991
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Showing 6 changed files with 748 additions and 13 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f99d60341238fe73fc514129cd9ae4e44e1b2c47
+refs/heads/master: 4ce63fcd919c32d22528e54dcd89506962933719
diff --git a/trunk/arch/arm/Kconfig b/trunk/arch/arm/Kconfig
@@ -46,6 +46,14 @@ config ARM
 config ARM_HAS_SG_CHAIN
 	bool
 
+config NEED_SG_DMA_LENGTH
+	bool
+
+config ARM_DMA_USE_IOMMU
+	select NEED_SG_DMA_LENGTH
+	select ARM_HAS_SG_CHAIN
+	bool
+
 config HAVE_PWM
 	bool
 

diff --git a/trunk/arch/arm/include/asm/device.h b/trunk/arch/arm/include/asm/device.h
@@ -14,6 +14,9 @@ struct dev_archdata {
 #ifdef CONFIG_IOMMU_API
 	void *iommu; /* private IOMMU data */
 #endif
+#ifdef CONFIG_ARM_DMA_USE_IOMMU
+	struct dma_iommu_mapping	*mapping;
+#endif
 };
 
 struct omap_device;

diff --git a/trunk/arch/arm/include/asm/dma-iommu.h b/trunk/arch/arm/include/asm/dma-iommu.h
@@ -0,0 +1,34 @@
+#ifndef ASMARM_DMA_IOMMU_H
+#define ASMARM_DMA_IOMMU_H
+
+#ifdef __KERNEL__
+
+#include <linux/mm_types.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-debug.h>
+#include <linux/kmemcheck.h>
+
+struct dma_iommu_mapping {
+	/* iommu specific data */
+	struct iommu_domain	*domain;
+
+	void			*bitmap;
+	size_t			bits;
+	unsigned int		order;
+	dma_addr_t		base;
+
+	spinlock_t		lock;
+	struct kref		kref;
+};
+
+struct dma_iommu_mapping *
+arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size,
+			 int order);
+
+void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
+
+int arm_iommu_attach_device(struct device *dev,
+					struct dma_iommu_mapping *mapping);
+
+#endif /* __KERNEL__ */
+#endif