summaryrefslogtreecommitdiff
path: root/kernel/dma
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2020-02-21 15:55:43 -0800
committerChristoph Hellwig <hch@lst.de>2020-03-16 10:48:09 +0100
commitfa7e2247c5729f990c7456fe09f3af99c8f2571b (patch)
tree65aa46af4ff51a93301caca46b509c34267bfe40 /kernel/dma
parent3d0fc341c4bb66b2c41c0d1ec954a6d300e100b7 (diff)
dma-direct: make uncached_kernel_address more general
Rename the symbol to arch_dma_set_uncached, and pass a size to it as well as allow an error return. That will allow reusing this hook for in-place pagetable remapping. As the in-place remap doesn't always require an explicit cache flush, also detangle ARCH_HAS_DMA_PREP_COHERENT from ARCH_HAS_DMA_SET_UNCACHED. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to 'kernel/dma')
-rw-r--r--kernel/dma/direct.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 650580fbbff3..baf4e93735c3 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -192,10 +192,12 @@ void *dma_direct_alloc_pages(struct device *dev, size_t size,
memset(ret, 0, size);
- if (IS_ENABLED(CONFIG_ARCH_HAS_UNCACHED_SEGMENT) &&
+ if (IS_ENABLED(CONFIG_ARCH_HAS_DMA_SET_UNCACHED) &&
dma_alloc_need_uncached(dev, attrs)) {
arch_dma_prep_coherent(page, size);
- ret = uncached_kernel_address(ret);
+ ret = arch_dma_set_uncached(ret, size);
+ if (IS_ERR(ret))
+ goto out_free_pages;
}
done:
if (force_dma_unencrypted(dev))
@@ -236,7 +238,7 @@ void dma_direct_free_pages(struct device *dev, size_t size, void *cpu_addr,
void *dma_direct_alloc(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
- if (!IS_ENABLED(CONFIG_ARCH_HAS_UNCACHED_SEGMENT) &&
+ if (!IS_ENABLED(CONFIG_ARCH_HAS_DMA_SET_UNCACHED) &&
!IS_ENABLED(CONFIG_DMA_DIRECT_REMAP) &&
dma_alloc_need_uncached(dev, attrs))
return arch_dma_alloc(dev, size, dma_handle, gfp, attrs);
@@ -246,7 +248,7 @@ void *dma_direct_alloc(struct device *dev, size_t size,
void dma_direct_free(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs)
{
- if (!IS_ENABLED(CONFIG_ARCH_HAS_UNCACHED_SEGMENT) &&
+ if (!IS_ENABLED(CONFIG_ARCH_HAS_DMA_SET_UNCACHED) &&
!IS_ENABLED(CONFIG_DMA_DIRECT_REMAP) &&
dma_alloc_need_uncached(dev, attrs))
arch_dma_free(dev, size, cpu_addr, dma_addr, attrs);