diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/cell/iommu.c | 14 | ||||
| -rw-r--r-- | arch/powerpc/platforms/cell/iommu.h | 8 |
2 files changed, 16 insertions, 6 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index 0e6ab8a55ef..e3ea5311476 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -46,6 +46,8 @@ #include "iommu.h" +static dma_addr_t cell_dma_valid = SPIDER_DMA_VALID; + static inline unsigned long get_iopt_entry(unsigned long real_address, unsigned long ioid, unsigned long prot) @@ -423,7 +425,7 @@ static void *cell_alloc_coherent(struct device *hwdev, size_t size, ret = (void *)__get_free_pages(flag, get_order(size)); if (ret != NULL) { memset(ret, 0, size); - *dma_handle = virt_to_abs(ret) | CELL_DMA_VALID; + *dma_handle = virt_to_abs(ret) | cell_dma_valid; } return ret; } @@ -437,7 +439,7 @@ static void cell_free_coherent(struct device *hwdev, size_t size, static dma_addr_t cell_map_single(struct device *hwdev, void *ptr, size_t size, enum dma_data_direction direction) { - return virt_to_abs(ptr) | CELL_DMA_VALID; + return virt_to_abs(ptr) | cell_dma_valid; } static void cell_unmap_single(struct device *hwdev, dma_addr_t dma_addr, @@ -452,7 +454,7 @@ static int cell_map_sg(struct device *hwdev, struct scatterlist *sg, for (i = 0; i < nents; i++, sg++) { sg->dma_address = (page_to_phys(sg->page) + sg->offset) - | CELL_DMA_VALID; + | cell_dma_valid; sg->dma_length = sg->length; } @@ -483,6 +485,12 @@ void cell_init_iommu(void) { int setup_bus = 0; + /* If we have an Axon bridge, clear the DMA valid mask. This is fairly + * hackish but will work well enough until we have proper iommu code. + */ + if (of_find_node_by_name(NULL, "axon")) + cell_dma_valid = 0; + if (of_find_node_by_path("/mambo")) { pr_info("Not using iommu on systemsim\n"); } else { diff --git a/arch/powerpc/platforms/cell/iommu.h b/arch/powerpc/platforms/cell/iommu.h index 490d77abfe8..2a9ab95604a 100644 --- a/arch/powerpc/platforms/cell/iommu.h +++ b/arch/powerpc/platforms/cell/iommu.h @@ -53,9 +53,11 @@ enum { IOC_ST_ORIGIN = 0x918, IOC_CONF = 0x930, - /* The high bit needs to be set on every DMA address, - only 2GB are addressable */ - CELL_DMA_VALID = 0x80000000, + /* The high bit needs to be set on every DMA address when using + * a spider bridge and only 2GB are addressable with the current + * iommu code. + */ + SPIDER_DMA_VALID = 0x80000000, CELL_DMA_MASK = 0x7fffffff, }; |