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authorBecky Bruce <beckyb@kernel.crashing.org>2009-09-21 08:26:35 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-09-24 15:31:43 +1000
commit738ef42e32fe95553a424c04016b936c9f6c9afb (patch)
treef45f21a92eacbb22bd3223c5ac725473c6ec1d72 /arch/powerpc/include
parent1cebd7a0f62804ca24f7b7b35e8105000b9e879a (diff)
powerpc: Change archdata dma_data to a union
Sometimes this is used to hold a simple offset, and sometimes it is used to hold a pointer. This patch changes it to a union containing void * and dma_addr_t. get/set accessors are also provided, because it was getting a bit ugly to get to the actual data. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include')
-rw-r--r--arch/powerpc/include/asm/device.h11
-rw-r--r--arch/powerpc/include/asm/dma-mapping.h10
-rw-r--r--arch/powerpc/include/asm/iommu.h10
3 files changed, 28 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h
index 9dade15d1ab4..6d94d27ed850 100644
--- a/arch/powerpc/include/asm/device.h
+++ b/arch/powerpc/include/asm/device.h
@@ -15,7 +15,16 @@ struct dev_archdata {
/* DMA operations on that device */
struct dma_map_ops *dma_ops;
- void *dma_data;
+
+ /*
+ * When an iommu is in use, dma_data is used as a ptr to the base of the
+ * iommu_table. Otherwise, it is a simple numerical offset.
+ */
+ union {
+ dma_addr_t dma_offset;
+ void *iommu_table_base;
+ } dma_data;
+
#ifdef CONFIG_SWIOTLB
dma_addr_t max_direct_dma_addr;
#endif
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index 34b919fe8cda..e281daebddca 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -97,14 +97,20 @@ static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops)
* swiotlb use this function, but it is typically not used by implementations
* with an iommu.
*/
-static inline unsigned long get_dma_offset(struct device *dev)
+static inline dma_addr_t get_dma_offset(struct device *dev)
{
if (dev)
- return (unsigned long)dev->archdata.dma_data;
+ return dev->archdata.dma_data.dma_offset;
return PCI_DRAM_OFFSET;
}
+static inline void set_dma_offset(struct device *dev, dma_addr_t off)
+{
+ if (dev)
+ dev->archdata.dma_data.dma_offset = off;
+}
+
/* this will be removed soon */
#define flush_write_buffers()
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index 7464c0daddd1..edfc9803ec91 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -70,6 +70,16 @@ struct iommu_table {
struct scatterlist;
+static inline void set_iommu_table_base(struct device *dev, void *base)
+{
+ dev->archdata.dma_data.iommu_table_base = base;
+}
+
+static inline void *get_iommu_table_base(struct device *dev)
+{
+ return dev->archdata.dma_data.iommu_table_base;
+}
+
/* Frees table for an individual device node */
extern void iommu_free_table(struct iommu_table *tbl, const char *node_name);