@@ -5,22 +5,6 @@
#include <asm/page.h>
#include <linux/dma-mapping.h>
-static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
- dma_addr_t *dma_handle, gfp_t flags,
- unsigned long attrs)
-{
- void *vstart = (void*)__get_free_pages(flags, get_order(size));
- *dma_handle = virt_to_phys(vstart);
- return vstart;
-}
-
-static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
- void *cpu_addr, dma_addr_t dma_handle,
- unsigned long attrs)
-{
- free_pages((unsigned long) cpu_addr, get_order(size));
-}
-
static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
dma_addr_t dev_addr, unsigned long offset, size_t size,
enum dma_data_direction dir, unsigned long attrs) { }
@@ -299,8 +299,7 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
* address. In fact on ARM virt_to_phys only works for kernel direct
* mapped RAM memory. Also see comment below.
*/
- ret = xen_alloc_coherent_pages(hwdev, size, dma_handle, flags, attrs);
-
+ ret = dma_direct_alloc(hwdev, size, dma_handle, flags, attrs);
if (!ret)
return ret;
@@ -319,7 +318,7 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
else {
if (xen_create_contiguous_region(phys, order,
fls64(dma_mask), dma_handle) != 0) {
- xen_free_coherent_pages(hwdev, size, ret, (dma_addr_t)phys, attrs);
+ dma_direct_free(hwdev, size, ret, (dma_addr_t)phys, attrs);
return NULL;
}
SetPageXenRemapped(virt_to_page(ret));
@@ -351,7 +350,7 @@ xen_swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
TestClearPageXenRemapped(virt_to_page(vaddr)))
xen_destroy_contiguous_region(phys, order);
- xen_free_coherent_pages(hwdev, size, vaddr, (dma_addr_t)phys, attrs);
+ dma_direct_free(hwdev, size, vaddr, (dma_addr_t)phys, attrs);
}
/*
@@ -16,18 +16,6 @@ void __xen_dma_sync_single_for_cpu(struct device *hwdev,
void __xen_dma_sync_single_for_device(struct device *hwdev,
dma_addr_t handle, size_t size, enum dma_data_direction dir);
-static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
- dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs)
-{
- return dma_direct_alloc(hwdev, size, dma_handle, flags, attrs);
-}
-
-static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
- void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs)
-{
- dma_direct_free(hwdev, size, cpu_addr, dma_handle, attrs);
-}
-
static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
x86 currently calls alloc_pages, but using dma-direct works as well there, with the added benefit of using the CMA pool if available. The biggest advantage is of course to remove a pointless bit of architecture specific code. Signed-off-by: Christoph Hellwig <hch@lst.de> --- arch/x86/include/asm/xen/page-coherent.h | 16 ---------------- drivers/xen/swiotlb-xen.c | 7 +++---- include/xen/arm/page-coherent.h | 12 ------------ 3 files changed, 3 insertions(+), 32 deletions(-)