diff options
Diffstat (limited to 'arch/powerpc/kernel/iommu.c')
| -rw-r--r-- | arch/powerpc/kernel/iommu.c | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index 3857d7e2af0..1bfa706b96e 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -32,6 +32,7 @@ #include <linux/dma-mapping.h> #include <linux/bitops.h> #include <linux/iommu-helper.h> +#include <linux/crash_dump.h> #include <asm/io.h> #include <asm/prom.h> #include <asm/iommu.h> @@ -460,7 +461,7 @@ void iommu_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist, static void iommu_table_clear(struct iommu_table *tbl) { - if (!__kdump_flag) { + if (!is_kdump_kernel()) { /* Clear the table in case firmware left allocations in it */ ppc_md.tce_free(tbl, tbl->it_offset, tbl->it_size); return; @@ -564,21 +565,23 @@ void iommu_free_table(struct iommu_table *tbl, const char *node_name) } /* Creates TCEs for a user provided buffer. The user buffer must be - * contiguous real kernel storage (not vmalloc). The address of the buffer - * passed here is the kernel (virtual) address of the buffer. The buffer - * need not be page aligned, the dma_addr_t returned will point to the same - * byte within the page as vaddr. + * contiguous real kernel storage (not vmalloc). The address passed here + * comprises a page address and offset into that page. The dma_addr_t + * returned will point to the same byte within the page as was passed in. */ -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, struct dma_attrs *attrs) +dma_addr_t iommu_map_page(struct device *dev, struct iommu_table *tbl, + struct page *page, unsigned long offset, size_t size, + unsigned long mask, enum dma_data_direction direction, + struct dma_attrs *attrs) { dma_addr_t dma_handle = DMA_ERROR_CODE; + void *vaddr; unsigned long uaddr; unsigned int npages, align; BUG_ON(direction == DMA_NONE); + vaddr = page_address(page) + offset; uaddr = (unsigned long)vaddr; npages = iommu_num_pages(uaddr, size, IOMMU_PAGE_SIZE); @@ -604,9 +607,9 @@ dma_addr_t iommu_map_single(struct device *dev, struct iommu_table *tbl, return dma_handle; } -void iommu_unmap_single(struct iommu_table *tbl, dma_addr_t dma_handle, - size_t size, enum dma_data_direction direction, - struct dma_attrs *attrs) +void iommu_unmap_page(struct iommu_table *tbl, dma_addr_t dma_handle, + size_t size, enum dma_data_direction direction, + struct dma_attrs *attrs) { unsigned int npages; |