mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
0ead51c3fb
Instead of globally disabling > 32bit DMA using the arch_dma_supported hook walk the PCI bus under the actually affected bridge and mark every device with the dma_32bit_limit flag. This also gets rid of the arch_dma_supported hook entirely. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
37 lines
824 B
C
37 lines
824 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_DMA_MAPPING_H
|
|
#define _ASM_X86_DMA_MAPPING_H
|
|
|
|
/*
|
|
* IOMMU interface. See Documentation/DMA-API-HOWTO.txt and
|
|
* Documentation/DMA-API.txt for documentation.
|
|
*/
|
|
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/dma-debug.h>
|
|
#include <asm/io.h>
|
|
#include <asm/swiotlb.h>
|
|
#include <linux/dma-contiguous.h>
|
|
|
|
#ifdef CONFIG_ISA
|
|
# define ISA_DMA_BIT_MASK DMA_BIT_MASK(24)
|
|
#else
|
|
# define ISA_DMA_BIT_MASK DMA_BIT_MASK(32)
|
|
#endif
|
|
|
|
extern int iommu_merge;
|
|
extern struct device x86_dma_fallback_dev;
|
|
extern int panic_on_overflow;
|
|
|
|
extern const struct dma_map_ops *dma_ops;
|
|
|
|
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
|
|
{
|
|
return dma_ops;
|
|
}
|
|
|
|
bool arch_dma_alloc_attrs(struct device **dev);
|
|
#define arch_dma_alloc_attrs arch_dma_alloc_attrs
|
|
|
|
#endif
|