mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
972 B
43 lines
972 B
// 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); |
|
}
|
|
|