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authorChristoph Hellwig <hch@lst.de>2019-09-02 11:44:19 +0300
committerChristoph Hellwig <hch@lst.de>2019-09-11 13:43:16 +0300
commit8e23c82c68635a8859820bc6feb0fb3798aed943 (patch)
tree7e42707e498229b72b89d6f782eef6ddb7051f5e /drivers/xen
parent78406ff566ecd72021928217908ca255406bd914 (diff)
downloadlinux-8e23c82c68635a8859820bc6feb0fb3798aed943.tar.xz
xen/arm: use dma-noncoherent.h calls for xen-swiotlb cache maintainance
Copy the arm64 code that uses the dma-direct/swiotlb helpers for DMA on-coherent devices. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/swiotlb-xen.c20
1 files changed, 0 insertions, 20 deletions
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index ae1df496bf38..eee86cc7046b 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -557,11 +557,6 @@ xen_swiotlb_dma_mmap(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
unsigned long attrs)
{
-#ifdef CONFIG_ARM
- if (xen_get_dma_ops(dev)->mmap)
- return xen_get_dma_ops(dev)->mmap(dev, vma, cpu_addr,
- dma_addr, size, attrs);
-#endif
return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
}
@@ -574,21 +569,6 @@ xen_swiotlb_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t handle, size_t size,
unsigned long attrs)
{
-#ifdef CONFIG_ARM
- if (xen_get_dma_ops(dev)->get_sgtable) {
-#if 0
- /*
- * This check verifies that the page belongs to the current domain and
- * is not one mapped from another domain.
- * This check is for debug only, and should not go to production build
- */
- unsigned long bfn = PHYS_PFN(dma_to_phys(dev, handle));
- BUG_ON (!page_is_ram(bfn));
-#endif
- return xen_get_dma_ops(dev)->get_sgtable(dev, sgt, cpu_addr,
- handle, size, attrs);
- }
-#endif
return dma_common_get_sgtable(dev, sgt, cpu_addr, handle, size, attrs);
}