diff options
Diffstat (limited to 'arch/microblaze/kernel/dma.c')
| -rw-r--r-- | arch/microblaze/kernel/dma.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c new file mode 100644 index 0000000000..04d091ade4 --- /dev/null +++ b/arch/microblaze/kernel/dma.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2009-2010 PetaLogix + * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corporation + * + * Provide default implementations of the DMA mapping callbacks for + * directly mapped busses. + */ + +#include <linux/device.h> +#include <linux/dma-map-ops.h> +#include <linux/gfp.h> +#include <linux/export.h> +#include <linux/bug.h> +#include <asm/cacheflush.h> + +static void __dma_sync(phys_addr_t paddr, size_t size, + enum dma_data_direction direction) +{ + switch (direction) { + case DMA_TO_DEVICE: + case DMA_BIDIRECTIONAL: + flush_dcache_range(paddr, paddr + size); + break; + case DMA_FROM_DEVICE: + invalidate_dcache_range(paddr, paddr + size); + break; + default: + BUG(); + } +} + +void arch_sync_dma_for_device(phys_addr_t paddr, size_t size, + enum dma_data_direction dir) +{ + __dma_sync(paddr, size, dir); +} + +void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size, + enum dma_data_direction dir) +{ + __dma_sync(paddr, size, dir); +} |