Release 4.16 arch/x86/include/asm/dma-mapping.h
/* 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| FUJITA Tomonori | 14 | 77.78% | 2 | 50.00% |
| Bart Van Assche | 4 | 22.22% | 2 | 50.00% |
| Total | 18 | 100.00% | 4 | 100.00% |
int arch_dma_supported(struct device *dev, u64 mask);
#define arch_dma_supported arch_dma_supported
bool arch_dma_alloc_attrs(struct device **dev, gfp_t *gfp);
#define arch_dma_alloc_attrs arch_dma_alloc_attrs
extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag,
unsigned long attrs);
extern void dma_generic_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_addr,
unsigned long attrs);
static inline unsigned long dma_alloc_coherent_mask(struct device *dev,
gfp_t gfp)
{
unsigned long dma_mask = 0;
dma_mask = dev->coherent_dma_mask;
if (!dma_mask)
dma_mask = (gfp & GFP_DMA) ? DMA_BIT_MASK(24) : DMA_BIT_MASK(32);
return dma_mask;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| FUJITA Tomonori | 43 | 79.63% | 1 | 25.00% |
| Yang Hongyang | 8 | 14.81% | 2 | 50.00% |
| Glauber de Oliveira Costa | 3 | 5.56% | 1 | 25.00% |
| Total | 54 | 100.00% | 4 | 100.00% |
static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp)
{
unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp);
if (dma_mask <= DMA_BIT_MASK(24))
gfp |= GFP_DMA;
#ifdef CONFIG_X86_64
if (dma_mask <= DMA_BIT_MASK(32) && !(gfp & GFP_DMA))
gfp |= GFP_DMA32;
#endif
return gfp;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| FUJITA Tomonori | 59 | 88.06% | 2 | 50.00% |
| Yang Hongyang | 8 | 11.94% | 2 | 50.00% |
| Total | 67 | 100.00% | 4 | 100.00% |
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| FUJITA Tomonori | 129 | 45.74% | 5 | 20.83% |
| Glauber de Oliveira Costa | 44 | 15.60% | 4 | 16.67% |
| Christoph Hellwig | 34 | 12.06% | 2 | 8.33% |
| Marek Szyprowski | 23 | 8.16% | 1 | 4.17% |
| Yang Hongyang | 16 | 5.67% | 2 | 8.33% |
| Jan Beulich | 15 | 5.32% | 1 | 4.17% |
| Joerg Roedel | 6 | 2.13% | 2 | 8.33% |
| Bart Van Assche | 5 | 1.77% | 2 | 8.33% |
| Krzysztof Kozlowski | 4 | 1.42% | 1 | 4.17% |
| H. Peter Anvin | 2 | 0.71% | 1 | 4.17% |
| Andrzej Pietrasiewicz | 2 | 0.71% | 1 | 4.17% |
| Paul Bolle | 1 | 0.35% | 1 | 4.17% |
| Greg Kroah-Hartman | 1 | 0.35% | 1 | 4.17% |
| Total | 282 | 100.00% | 24 | 100.00% |
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