diff options
| author | Becky Bruce <beckyb@kernel.crashing.org> | 2009-09-21 08:26:35 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-09-24 15:31:43 +1000 |
| commit | 738ef42e32fe95553a424c04016b936c9f6c9afb (patch) | |
| tree | f45f21a92eacbb22bd3223c5ac725473c6ec1d72 /arch/powerpc/include | |
| parent | 1cebd7a0f62804ca24f7b7b35e8105000b9e879a (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.h | 11 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/dma-mapping.h | 10 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/iommu.h | 10 |
3 files changed, 28 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h index 9dade15d1ab..6d94d27ed85 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 34b919fe8cd..e281daebddc 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 7464c0daddd..edfc9803ec9 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); |