Commit 3affedc4 authored by Mark Nelson's avatar Mark Nelson Committed by Benjamin Herrenschmidt
Browse files

powerpc/dma: implement new dma_*map*_attrs() interfaces 



Update powerpc to use the new dma_*map*_attrs() interfaces. In doing so
update struct dma_mapping_ops to accept a struct dma_attrs and propagate
these changes through to all users of the code (generic IOMMU and the
64bit DMA code, and the iseries and ps3 platform code).

The old dma_*map_*() interfaces are reimplemented as calls to the
corresponding new interfaces.

Signed-off-by: default avatarMark Nelson <markn@au1.ibm.com>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarGeoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent c8692362

arch/powerpc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -110,6 +110,7 @@ config PPC 
	select HAVE_KPROBES

	select HAVE_KRETPROBES

	select HAVE_LMB

	select HAVE_DMA_ATTRS



config EARLY_PRINTK

	bool

arch/powerpc/kernel/dma_64.c

+22 −12
Original line number Diff line number Diff line
@@ -50,32 +50,38 @@ static void dma_iommu_free_coherent(struct device *dev, size_t size, 
 */

static dma_addr_t dma_iommu_map_single(struct device *dev, void *vaddr,

				       size_t size,

				       enum dma_data_direction direction)

				       enum dma_data_direction direction,

				       struct dma_attrs *attrs)

{

	return iommu_map_single(dev, dev->archdata.dma_data, vaddr, size,

			        device_to_mask(dev), direction);

				device_to_mask(dev), direction, attrs);

}





static void dma_iommu_unmap_single(struct device *dev, dma_addr_t dma_handle,

				   size_t size,

				   enum dma_data_direction direction)

				   enum dma_data_direction direction,

				   struct dma_attrs *attrs)

{

	iommu_unmap_single(dev->archdata.dma_data, dma_handle, size, direction);

	iommu_unmap_single(dev->archdata.dma_data, dma_handle, size, direction,

			   attrs);

}





static int dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist,

			    int nelems, enum dma_data_direction direction)

			    int nelems, enum dma_data_direction direction,

			    struct dma_attrs *attrs)

{

	return iommu_map_sg(dev, dev->archdata.dma_data, sglist, nelems,

			    device_to_mask(dev), direction);

			    device_to_mask(dev), direction, attrs);

}



static void dma_iommu_unmap_sg(struct device *dev, struct scatterlist *sglist,

		int nelems, enum dma_data_direction direction)

		int nelems, enum dma_data_direction direction,

		struct dma_attrs *attrs)

{

	iommu_unmap_sg(dev->archdata.dma_data, sglist, nelems, direction);

	iommu_unmap_sg(dev->archdata.dma_data, sglist, nelems, direction,

		       attrs);

}



/* We support DMA to/from any memory page via the iommu */
@@ -148,19 +154,22 @@ static void dma_direct_free_coherent(struct device *dev, size_t size, 


static dma_addr_t dma_direct_map_single(struct device *dev, void *ptr,

					size_t size,

					enum dma_data_direction direction)

					enum dma_data_direction direction,

					struct dma_attrs *attrs)

{

	return virt_to_abs(ptr) + get_dma_direct_offset(dev);

}



static void dma_direct_unmap_single(struct device *dev, dma_addr_t dma_addr,

				    size_t size,

				    enum dma_data_direction direction)

				    enum dma_data_direction direction,

				    struct dma_attrs *attrs)

{

}



static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,

			     int nents, enum dma_data_direction direction)

			     int nents, enum dma_data_direction direction,

			     struct dma_attrs *attrs)

{

	struct scatterlist *sg;

	int i;
@@ -174,7 +183,8 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, 
}



static void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sg,

				int nents, enum dma_data_direction direction)

				int nents, enum dma_data_direction direction,

				struct dma_attrs *attrs)

{

}

arch/powerpc/kernel/ibmebus.c

+8 −4
Original line number Diff line number Diff line
@@ -82,7 +82,8 @@ static void ibmebus_free_coherent(struct device *dev, 
static dma_addr_t ibmebus_map_single(struct device *dev,

				     void *ptr,

				     size_t size,

				     enum dma_data_direction direction)

				     enum dma_data_direction direction,

				     struct dma_attrs *attrs)

{

	return (dma_addr_t)(ptr);

}
@@ -90,14 +91,16 @@ static dma_addr_t ibmebus_map_single(struct device *dev, 
static void ibmebus_unmap_single(struct device *dev,

				 dma_addr_t dma_addr,

				 size_t size,

				 enum dma_data_direction direction)

				 enum dma_data_direction direction,

				 struct dma_attrs *attrs)

{

	return;

}



static int ibmebus_map_sg(struct device *dev,

			  struct scatterlist *sgl,

			  int nents, enum dma_data_direction direction)

			  int nents, enum dma_data_direction direction,

			  struct dma_attrs *attrs)

{

	struct scatterlist *sg;

	int i;
@@ -112,7 +115,8 @@ static int ibmebus_map_sg(struct device *dev, 


static void ibmebus_unmap_sg(struct device *dev,

			     struct scatterlist *sg,

			     int nents, enum dma_data_direction direction)

			     int nents, enum dma_data_direction direction,

			     struct dma_attrs *attrs)

{

	return;

}

arch/powerpc/kernel/iommu.c

+7 −4
Original line number Diff line number Diff line
@@ -269,7 +269,8 @@ static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr, 


int iommu_map_sg(struct device *dev, struct iommu_table *tbl,

		 struct scatterlist *sglist, int nelems,

		 unsigned long mask, enum dma_data_direction direction)

		 unsigned long mask, enum dma_data_direction direction,

		 struct dma_attrs *attrs)

{

	dma_addr_t dma_next = 0, dma_addr;

	unsigned long flags;
@@ -411,7 +412,8 @@ int iommu_map_sg(struct device *dev, struct iommu_table *tbl, 




void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist,

		int nelems, enum dma_data_direction direction)

		int nelems, enum dma_data_direction direction,

		struct dma_attrs *attrs)

{

	struct scatterlist *sg;

	unsigned long flags;
@@ -553,7 +555,7 @@ void iommu_free_table(struct iommu_table *tbl, const char *node_name) 
 */

dma_addr_t iommu_map_single(struct device *dev, struct iommu_table *tbl,

			    void *vaddr, size_t size, unsigned long mask,

			    enum dma_data_direction direction)

		enum dma_data_direction direction, struct dma_attrs *attrs)

{

	dma_addr_t dma_handle = DMA_ERROR_CODE;

	unsigned long uaddr;
@@ -586,7 +588,8 @@ dma_addr_t iommu_map_single(struct device *dev, struct iommu_table *tbl, 
}



void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle,

		size_t size, enum dma_data_direction direction)

		size_t size, enum dma_data_direction direction,

		struct dma_attrs *attrs)

{

	unsigned int npages;

arch/powerpc/platforms/iseries/iommu.c

+2 −2
Original line number Diff line number Diff line
@@ -214,13 +214,13 @@ dma_addr_t iseries_hv_map(void *vaddr, size_t size, 
			enum dma_data_direction direction)

{

	return iommu_map_single(NULL, &vio_iommu_table, vaddr, size,

				DMA_32BIT_MASK, direction);

				DMA_32BIT_MASK, direction, NULL);

}



void iseries_hv_unmap(dma_addr_t dma_handle, size_t size,

			enum dma_data_direction direction)

{

	iommu_unmap_single(&vio_iommu_table, dma_handle, size, direction);

	iommu_unmap_single(&vio_iommu_table, dma_handle, size, direction, NULL);

}



void __init iommu_vio_init(void)

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