[PATCH 09/25] iommu/dma: Squash __iommu_dma_{map,unmap}_page helpers

Christoph Hellwig
2019-04-30T10:51:58Z

From: Robin Murphy <robin.murphy@arm.com>

The remaining internal callsites don't care about having prototypes
compatible with the relevant dma_map_ops callbacks, so the extra
level of indirection just wastes space and complictaes things.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/iommu/dma-iommu.c | 25 +++++++------------------
1 file changed, 7 insertions(+), 18 deletions(-)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index eafc11daa868..82fb208017fb 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -698,18 +698,6 @@ static void iommu_dma_sync_sg_for_device(struct device *dev,
arch_sync_dma_for_device(dev, sg_phys(sg), sg->length, dir);
}

-static dma_addr_t __iommu_dma_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size, int prot)
-{
- return __iommu_dma_map(dev, page_to_phys(page) + offset, size, prot);
-}
-
-static void __iommu_dma_unmap_page(struct device *dev, dma_addr_t handle,
- size_t size, enum dma_data_direction dir, unsigned long attrs)
-{
- __iommu_dma_unmap(dev, handle, size);
-}
-
static dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir,
unsigned long attrs)
@@ -955,7 +943,8 @@ static void *iommu_dma_alloc(struct device *dev, size_t size,
if (!addr)
return NULL;

- *handle = __iommu_dma_map_page(dev, page, 0, iosize, ioprot);
+ *handle = __iommu_dma_map(dev, page_to_phys(page), iosize,
+ ioprot);
if (*handle == DMA_MAPPING_ERROR) {
if (coherent)
__free_pages(page, get_order(size));
@@ -972,7 +961,7 @@ static void *iommu_dma_alloc(struct device *dev, size_t size,
if (!page)
return NULL;

- *handle = __iommu_dma_map_page(dev, page, 0, iosize, ioprot);
+ *handle = __iommu_dma_map(dev, page_to_phys(page), iosize, ioprot);
if (*handle == DMA_MAPPING_ERROR) {
dma_release_from_contiguous(dev, page,
size >> PAGE_SHIFT);
@@ -986,7 +975,7 @@ static void *iommu_dma_alloc(struct device *dev, size_t size,
arch_dma_prep_coherent(page, iosize);
memset(addr, 0, size);
} else {
- __iommu_dma_unmap_page(dev, *handle, iosize, 0, attrs);
+ __iommu_dma_unmap(dev, *handle, iosize);
dma_release_from_contiguous(dev, page,
size >> PAGE_SHIFT);
}
@@ -1025,12 +1014,12 @@ static void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
* Hence how dodgy the below logic looks...
*/
if (dma_in_atomic_pool(cpu_addr, size)) {
- __iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
+ __iommu_dma_unmap(dev, handle, iosize);
dma_free_from_pool(cpu_addr, size);
} else if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
struct page *page = vmalloc_to_page(cpu_addr);

- __iommu_dma_unmap_page(dev, handle, iosize, 0, attrs);
+ __iommu_dma_unmap(dev, handle, iosize);
dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT);
dma_common_free_remap(cpu_addr, size, VM_USERMAP);
} else if (is_vmalloc_addr(cpu_addr)){
@@ -1041,7 +1030,7 @@ static void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
__iommu_dma_free(dev, area->pages, iosize, &handle);
dma_common_free_remap(cpu_addr, size, VM_USERMAP);
} else {
- __iommu_dma_unmap_page(dev, handle, iosize, 0, 0);
+ __iommu_dma_unmap(dev, handle, iosize);
__free_pages(virt_to_page(cpu_addr), get_order(size));
}
}
--
2.20.1