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swiotlb: remove dma_mark_clean

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Instead of providing a special dma_mark_clean hook just for ia64, switch
ia64 to use the normal arch_sync_dma_for_cpu hooks instead.

This means that we now also set the PG_arch_1 bit for pages in the
swiotlb buffer, which isn't stricly needed as we will never execute code
out of the swiotlb buffer, but otherwise harmless.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Tested-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Christoph Hellwig
2018-12-06 07:06:04 -08:00
parent b907e20508
commit 68c608345c
6 changed files with 30 additions and 56 deletions
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18
kernel/dma/swiotlb.c
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@@ -706,21 +706,8 @@ void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
(attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
arch_sync_dma_for_cpu(hwdev, paddr, size, dir);
if (is_swiotlb_buffer(paddr)) {
if (is_swiotlb_buffer(paddr))
swiotlb_tbl_unmap_single(hwdev, paddr, size, dir, attrs);
return;
}
if (dir != DMA_FROM_DEVICE)
return;
/*
* phys_to_virt doesn't work with hihgmem page but we could
* call dma_mark_clean() with hihgmem page here. However, we
* are fine since dma_mark_clean() is null on POWERPC. We can
* make dma_mark_clean() take a physical address if necessary.
*/
dma_mark_clean(phys_to_virt(paddr), size);
}
/*
@@ -750,9 +737,6 @@ swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
if (!dev_is_dma_coherent(hwdev) && target == SYNC_FOR_DEVICE)
arch_sync_dma_for_device(hwdev, paddr, size, dir);
if (!is_swiotlb_buffer(paddr) && dir == DMA_FROM_DEVICE)
dma_mark_clean(phys_to_virt(paddr), size);
}
void