On Wed, Jan 13, 2021 at 06:27:08PM +, Robin Murphy wrote:
>> Can we hook in somewhat lower level in the dma-direct code so that all
>> the remapping in dma-direct can be reused instead of duplicated? That
>> also becomes important if we want to use non-remapping uncached support,
>> e.g. on mi
On 2021-01-13 12:48, Christoph Hellwig wrote:
+#ifdef CONFIG_SWIOTLB
+ if (unlikely(dev->dma_io_tlb_mem))
+ return swiotlb_alloc(dev, size, dma_handle, attrs);
+#endif
Another place where the dma_io_tlb_mem is useful to avoid the ifdef.
-phys_addr_t swiotlb_tbl_map_single(
> +#ifdef CONFIG_SWIOTLB
> + if (unlikely(dev->dma_io_tlb_mem))
> + return swiotlb_alloc(dev, size, dma_handle, attrs);
> +#endif
Another place where the dma_io_tlb_mem is useful to avoid the ifdef.
> -phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t
> orig_ad
On 1/5/21 7:41 PM, Claire Chang wrote:
> Add the functions, swiotlb_alloc and swiotlb_free to support the
> memory allocation from restricted DMA pool.
>
> Signed-off-by: Claire Chang
> ---
[snip]
> diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> index 30ccbc08e229..126e9b3354d6 100644
Add the functions, swiotlb_alloc and swiotlb_free to support the
memory allocation from restricted DMA pool.
Signed-off-by: Claire Chang
---
include/linux/swiotlb.h | 6 ++
kernel/dma/direct.c | 12 +++
kernel/dma/swiotlb.c| 171 +---
3 files change
