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arm64/dma-mapping: Fix arch_sync_dma_for_device to respect dir parameter #6995

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Merged
pelwell merged 1 commit into from
Aug 13, 2025
Merged

arm64/dma-mapping: Fix arch_sync_dma_for_device to respect dir parameter #6995

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16 changes: 15 additions & 1 deletion arch/arm64/mm/dma-mapping.c
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Original file line number Diff line number Diff line change
Expand Up @@ -16,8 +16,22 @@ void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
enum dma_data_direction dir)
{
unsigned long start = (unsigned long)phys_to_virt(paddr);
unsigned long end = start + size;

dcache_clean_poc(start, start + size);
switch (dir) {
case DMA_BIDIRECTIONAL:
dcache_clean_inval_poc(start, end);
break;
case DMA_TO_DEVICE:
dcache_clean_poc(start, end);
break;
case DMA_FROM_DEVICE:
dcache_inval_poc(start, end);
break;
case DMA_NONE:
default:
break;
}
}

void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
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