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https://github.com/edk2-porting/linux-next.git
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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 */
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#ifndef _ASM_X86_DMA_MAPPING_H
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#define _ASM_X86_DMA_MAPPING_H
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/*
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* IOMMU interface. See Documentation/DMA-API-HOWTO.txt and
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* Documentation/DMA-API.txt for documentation.
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*/
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#include <linux/scatterlist.h>
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#include <linux/dma-debug.h>
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#include <asm/io.h>
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#include <asm/swiotlb.h>
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#include <linux/dma-contiguous.h>
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#ifdef CONFIG_ISA
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# define ISA_DMA_BIT_MASK DMA_BIT_MASK(24)
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#else
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# define ISA_DMA_BIT_MASK DMA_BIT_MASK(32)
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#endif
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extern int iommu_merge;
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extern struct device x86_dma_fallback_dev;
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extern int panic_on_overflow;
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extern const struct dma_map_ops *dma_ops;
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static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
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{
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return dma_ops;
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}
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bool arch_dma_alloc_attrs(struct device **dev);
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#define arch_dma_alloc_attrs arch_dma_alloc_attrs
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#endif
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