add lvds1024*800

hc

2024-01-31 f70575805708cabdedea7498aaa3f710fde4d920

 kernel/include/linux/dma-direct.h
..
..
@@ -1,69 +1,154 @@
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 /* SPDX-License-Identifier: GPL-2.0 */
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+/*
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+ * Internals of the DMA direct mapping implementation.  Only for use by the
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+ * DMA mapping code and IOMMU drivers.
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+ */
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 #ifndef _LINUX_DMA_DIRECT_H
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 #define _LINUX_DMA_DIRECT_H 1
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 #include <linux/dma-mapping.h>
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+#include <linux/dma-map-ops.h>
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+#include <linux/memblock.h> /* for min_low_pfn */
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 #include <linux/mem_encrypt.h>
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+#include <linux/swiotlb.h>
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+
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+extern unsigned int zone_dma_bits;
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+
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+/*
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+ * Record the mapping of CPU physical to DMA addresses for a given region.
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+ */
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+struct bus_dma_region {
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+	phys_addr_t	cpu_start;
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+	dma_addr_t	dma_start;
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+	u64		size;
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+	u64		offset;
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+};
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+
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+static inline bool zone_dma32_is_empty(int node)
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+{
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+#ifdef CONFIG_ZONE_DMA32
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+	pg_data_t *pgdat = NODE_DATA(node);
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+
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+	return zone_is_empty(&pgdat->node_zones[ZONE_DMA32]);
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+#else
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+	return true;
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+#endif
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+}
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+
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+static inline bool zone_dma32_are_empty(void)
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+{
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+#ifdef CONFIG_NUMA
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+	int node;
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+
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+	for_each_node(node)
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+		if (!zone_dma32_is_empty(node))
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+			return false;
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+#else
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+	if (!zone_dma32_is_empty(numa_node_id()))
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+		return false;
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+#endif
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+
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+	return true;
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+}
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+
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+static inline dma_addr_t translate_phys_to_dma(struct device *dev,
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+		phys_addr_t paddr)
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+{
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+	const struct bus_dma_region *m;
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+
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+	for (m = dev->dma_range_map; m->size; m++)
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+		if (paddr >= m->cpu_start && paddr - m->cpu_start < m->size)
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+			return (dma_addr_t)paddr - m->offset;
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+
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+	/* make sure dma_capable fails when no translation is available */
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+	return DMA_MAPPING_ERROR;
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+}
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+
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+static inline phys_addr_t translate_dma_to_phys(struct device *dev,
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+		dma_addr_t dma_addr)
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+{
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+	const struct bus_dma_region *m;
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+
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+	for (m = dev->dma_range_map; m->size; m++)
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+		if (dma_addr >= m->dma_start && dma_addr - m->dma_start < m->size)
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+			return (phys_addr_t)dma_addr + m->offset;
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+
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+	return (phys_addr_t)-1;
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+}
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 #ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
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 #include <asm/dma-direct.h>
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+#ifndef phys_to_dma_unencrypted
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+#define phys_to_dma_unencrypted		phys_to_dma
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+#endif
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 #else
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-static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
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+static inline dma_addr_t phys_to_dma_unencrypted(struct device *dev,
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+		phys_addr_t paddr)
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 {
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-	dma_addr_t dev_addr = (dma_addr_t)paddr;
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-
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-	return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
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+	if (dev->dma_range_map)
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+		return translate_phys_to_dma(dev, paddr);
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+	return paddr;
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 }
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-
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-static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr)
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-{
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-	phys_addr_t paddr = (phys_addr_t)dev_addr;
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-
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-	return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
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-}
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-
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-static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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-{
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-	if (!dev->dma_mask)
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-		return false;
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-
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-	return addr + size - 1 <= *dev->dma_mask;
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-}
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-#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
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92
 
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 /*
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  * If memory encryption is supported, phys_to_dma will set the memory encryption
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- * bit in the DMA address, and dma_to_phys will clear it.  The raw __phys_to_dma
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- * and __dma_to_phys versions should only be used on non-encrypted memory for
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- * special occasions like DMA coherent buffers.
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+ * bit in the DMA address, and dma_to_phys will clear it.
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+ * phys_to_dma_unencrypted is for use on special unencrypted memory like swiotlb
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+ * buffers.
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  */
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 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
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 {
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-	return __sme_set(__phys_to_dma(dev, paddr));
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+	return __sme_set(phys_to_dma_unencrypted(dev, paddr));
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 }
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103
 
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-static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
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+static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dma_addr)
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 {
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-	return __sme_clr(__dma_to_phys(dev, daddr));
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-}
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+	phys_addr_t paddr;
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-#ifdef CONFIG_ARCH_HAS_DMA_MARK_CLEAN
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-void dma_mark_clean(void *addr, size_t size);
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+	if (dev->dma_range_map)
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+		paddr = translate_dma_to_phys(dev, dma_addr);
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+	else
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+		paddr = dma_addr;
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+
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+	return __sme_clr(paddr);
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+}
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+#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
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+
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+#ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
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+bool force_dma_unencrypted(struct device *dev);
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 #else
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-static inline void dma_mark_clean(void *addr, size_t size)
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+static inline bool force_dma_unencrypted(struct device *dev)
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 {
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+	return false;
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 }
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-#endif /* CONFIG_ARCH_HAS_DMA_MARK_CLEAN */
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+#endif /* CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED */
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125
 
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+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size,
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+		bool is_ram)
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+{
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+	dma_addr_t end = addr + size - 1;
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+
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+	if (addr == DMA_MAPPING_ERROR)
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+		return false;
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+	if (is_ram && !IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) &&
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+	    min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn)))
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+		return false;
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+
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+	return end <= min_not_zero(*dev->dma_mask, dev->bus_dma_limit);
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+}
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+
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+u64 dma_direct_get_required_mask(struct device *dev);
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 void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
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 		gfp_t gfp, unsigned long attrs);
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143
 void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
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 		dma_addr_t dma_addr, unsigned long attrs);
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-dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
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-		unsigned long offset, size_t size, enum dma_data_direction dir,
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-		unsigned long attrs);
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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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+struct page *dma_direct_alloc_pages(struct device *dev, size_t size,
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+		dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp);
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+void dma_direct_free_pages(struct device *dev, size_t size,
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+		struct page *page, dma_addr_t dma_addr,
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+		enum dma_data_direction dir);
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 int dma_direct_supported(struct device *dev, u64 mask);
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-int dma_direct_mapping_error(struct device *dev, dma_addr_t dma_addr);
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+dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr,
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+		size_t size, enum dma_data_direction dir, unsigned long attrs);
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+
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154
 #endif /* _LINUX_DMA_DIRECT_H */