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: 256abd8e550ce977b728be79a74e1729438b4948 authored by Linus Torvalds on 07 July 2024, 21:23:46 UTC
Linux 6.10-rc7
Linux 6.10-rc7
Tip revision: 256abd8
dma.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* DMA implementation for Hexagon
*
* Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
*/
#include <linux/dma-map-ops.h>
#include <linux/memblock.h>
#include <asm/page.h>
void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
enum dma_data_direction dir)
{
void *addr = phys_to_virt(paddr);
switch (dir) {
case DMA_TO_DEVICE:
hexagon_clean_dcache_range((unsigned long) addr,
(unsigned long) addr + size);
break;
case DMA_FROM_DEVICE:
hexagon_inv_dcache_range((unsigned long) addr,
(unsigned long) addr + size);
break;
case DMA_BIDIRECTIONAL:
flush_dcache_range((unsigned long) addr,
(unsigned long) addr + size);
break;
default:
BUG();
}
}
/*
* Our max_low_pfn should have been backed off by 16MB in mm/init.c to create
* DMA coherent space. Use that for the pool.
*/
static int __init hexagon_dma_init(void)
{
return dma_init_global_coherent(PFN_PHYS(max_low_pfn),
hexagon_coherent_pool_size);
}
core_initcall(hexagon_dma_init);