Contributors: 7
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Vladimir Murzin |
146 |
85.88% |
1 |
12.50% |
| Doug Anderson |
8 |
4.71% |
1 |
12.50% |
| Santosh Shilimkar |
5 |
2.94% |
1 |
12.50% |
| Christoph Hellwig |
5 |
2.94% |
2 |
25.00% |
| Will Deacon |
3 |
1.76% |
1 |
12.50% |
| Thomas Gleixner |
2 |
1.18% |
1 |
12.50% |
| Yuli Wang |
1 |
0.59% |
1 |
12.50% |
| Total |
170 |
|
8 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Based on linux/arch/arm/mm/dma-mapping.c
*
* Copyright (C) 2000-2004 Russell King
*/
#include <linux/dma-map-ops.h>
#include <asm/cachetype.h>
#include <asm/cacheflush.h>
#include <asm/outercache.h>
#include <asm/cp15.h>
#include "dma.h"
void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
enum dma_data_direction dir)
{
dmac_map_area(__va(paddr), size, dir);
if (dir == DMA_FROM_DEVICE)
outer_inv_range(paddr, paddr + size);
else
outer_clean_range(paddr, paddr + size);
}
void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
enum dma_data_direction dir)
{
if (dir != DMA_TO_DEVICE) {
outer_inv_range(paddr, paddr + size);
dmac_unmap_area(__va(paddr), size, dir);
}
}
void arch_setup_dma_ops(struct device *dev, bool coherent)
{
if (IS_ENABLED(CONFIG_CPU_V7M)) {
/*
* Cache support for v7m is optional, so can be treated as
* coherent if no cache has been detected. Note that it is not
* enough to check if MPU is in use or not since in absence of
* MPU system memory map is used.
*/
dev_assign_dma_coherent(dev, cacheid ? coherent : true);
} else {
/*
* Assume coherent DMA in case MMU/MPU has not been set up.
*/
dev_assign_dma_coherent(dev, (get_cr() & CR_M) ? coherent : true);
}
}