mirror of
https://github.com/linux-msm/laptops-kernel.git
synced 2026-08-13 14:19:53 -07:00
Aneesh Kumar K.V (Arm)andMarek Szyprowski
b4f38ddd79
dma_direct_map_phys() is too large to benefit from being inlined. Move its implementation to direct.c and leave the declaration in direct.h. No functional change in this patch Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org> Link: https://lore.kernel.org/r/20260717180442.110954-17-aneesh.kumar@kernel.org Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
106 lines
3.4 KiB
C
106 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2018 Christoph Hellwig.
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*
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* DMA operations that map physical memory directly without using an IOMMU.
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*/
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#ifndef _KERNEL_DMA_DIRECT_H
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#define _KERNEL_DMA_DIRECT_H
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#include <linux/dma-direct.h>
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#include <linux/memremap.h>
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int dma_direct_get_sgtable(struct device *dev, struct sg_table *sgt,
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void *cpu_addr, dma_addr_t dma_addr, size_t size,
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unsigned long attrs);
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bool dma_direct_can_mmap(struct device *dev);
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int dma_direct_mmap(struct device *dev, struct vm_area_struct *vma,
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void *cpu_addr, dma_addr_t dma_addr, size_t size,
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unsigned long attrs);
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dma_addr_t dma_direct_map_phys(struct device *dev, phys_addr_t phys,
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size_t size, enum dma_data_direction dir,
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unsigned long attrs, bool flush);
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bool dma_direct_need_sync(struct device *dev, dma_addr_t dma_addr);
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int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
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enum dma_data_direction dir, unsigned long attrs);
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bool dma_direct_all_ram_mapped(struct device *dev);
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size_t dma_direct_max_mapping_size(struct device *dev);
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#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
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defined(CONFIG_SWIOTLB)
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void dma_direct_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,
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int nents, enum dma_data_direction dir);
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#else
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static inline void dma_direct_sync_sg_for_device(struct device *dev,
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struct scatterlist *sgl, int nents, enum dma_data_direction dir)
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{
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}
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#endif
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#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
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defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \
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defined(CONFIG_SWIOTLB)
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void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl,
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int nents, enum dma_data_direction dir, unsigned long attrs);
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void dma_direct_sync_sg_for_cpu(struct device *dev,
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struct scatterlist *sgl, int nents, enum dma_data_direction dir);
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#else
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static inline void dma_direct_unmap_sg(struct device *dev,
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struct scatterlist *sgl, int nents, enum dma_data_direction dir,
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unsigned long attrs)
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{
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}
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static inline void dma_direct_sync_sg_for_cpu(struct device *dev,
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struct scatterlist *sgl, int nents, enum dma_data_direction dir)
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{
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}
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#endif
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static inline void dma_direct_sync_single_for_device(struct device *dev,
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dma_addr_t addr, size_t size, enum dma_data_direction dir)
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{
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phys_addr_t paddr = dma_to_phys(dev, addr);
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swiotlb_sync_single_for_device(dev, paddr, size, dir);
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if (!dev_is_dma_coherent(dev)) {
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arch_sync_dma_for_device(paddr, size, dir);
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arch_sync_dma_flush();
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}
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}
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static inline void dma_direct_sync_single_for_cpu(struct device *dev,
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dma_addr_t addr, size_t size, enum dma_data_direction dir,
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bool flush)
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{
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phys_addr_t paddr = dma_to_phys(dev, addr);
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if (!dev_is_dma_coherent(dev)) {
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arch_sync_dma_for_cpu(paddr, size, dir);
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if (flush)
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arch_sync_dma_flush();
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arch_sync_dma_for_cpu_all();
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}
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swiotlb_sync_single_for_cpu(dev, paddr, size, dir);
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}
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static inline void dma_direct_unmap_phys(struct device *dev, dma_addr_t addr,
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size_t size, enum dma_data_direction dir, unsigned long attrs,
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bool flush)
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{
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phys_addr_t phys;
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if (attrs & (DMA_ATTR_MMIO | DMA_ATTR_REQUIRE_COHERENT))
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/* nothing to do: uncached and no swiotlb */
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return;
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phys = dma_to_phys(dev, addr);
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if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
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dma_direct_sync_single_for_cpu(dev, addr, size, dir, flush);
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swiotlb_tbl_unmap_single(dev, phys, size, dir,
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attrs | DMA_ATTR_SKIP_CPU_SYNC);
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}
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#endif /* _KERNEL_DMA_DIRECT_H */
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