https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f authored by Linus Torvalds on 12 September 2021, 23:28:37 UTC
Linux 5.15-rc1
Linux 5.15-rc1
Tip revision: 6880fa6
dma.c
// 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);
}