diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 4c0f498069e8..e4effbb243b1 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -549,7 +549,7 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
 			const struct iommu_ops *iommu, bool coherent)
 {
 	if (!dev->dma_ops)
-		dev->dma_ops = &swiotlb_dma_ops;
+		dev->dma_ops = &dma_direct_ops;
 
 	dev->dma_coherent = coherent;
 	__iommu_setup_dma_ops(dev, dma_base, size, iommu);
diff --git a/arch/ia64/hp/common/hwsw_iommu.c b/arch/ia64/hp/common/hwsw_iommu.c
index 58969039bed2..f40ca499b246 100644
--- a/arch/ia64/hp/common/hwsw_iommu.c
+++ b/arch/ia64/hp/common/hwsw_iommu.c
@@ -38,7 +38,7 @@ static inline int use_swiotlb(struct device *dev)
 const struct dma_map_ops *hwsw_dma_get_ops(struct device *dev)
 {
 	if (use_swiotlb(dev))
-		return &swiotlb_dma_ops;
+		return &dma_direct_ops;
 	return &sba_dma_ops;
 }
 EXPORT_SYMBOL(hwsw_dma_get_ops);
diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c
index 0d21c0b5b23d..5ee74820a0f6 100644
--- a/arch/ia64/hp/common/sba_iommu.c
+++ b/arch/ia64/hp/common/sba_iommu.c
@@ -2065,8 +2065,6 @@ static int __init acpi_sba_ioc_init_acpi(void)
 /* This has to run before acpi_scan_init(). */
 arch_initcall(acpi_sba_ioc_init_acpi);
 
-extern const struct dma_map_ops swiotlb_dma_ops;
-
 static int __init
 sba_init(void)
 {
@@ -2080,7 +2078,7 @@ sba_init(void)
 	 * a successful kdump kernel boot is to use the swiotlb.
 	 */
 	if (is_kdump_kernel()) {
-		dma_ops = &swiotlb_dma_ops;
+		dma_ops = &dma_direct_ops;
 		if (swiotlb_late_init_with_default_size(64 * (1<<20)) != 0)
 			panic("Unable to initialize software I/O TLB:"
 				  " Try machvec=dig boot option");
@@ -2102,7 +2100,7 @@ sba_init(void)
 		 * If we didn't find something sba_iommu can claim, we
 		 * need to setup the swiotlb and switch to the dig machvec.
 		 */
-		dma_ops = &swiotlb_dma_ops;
+		dma_ops = &dma_direct_ops;
 		if (swiotlb_late_init_with_default_size(64 * (1<<20)) != 0)
 			panic("Unable to find SBA IOMMU or initialize "
 			      "software I/O TLB: Try machvec=dig boot option");
diff --git a/arch/ia64/kernel/dma-mapping.c b/arch/ia64/kernel/dma-mapping.c
index 36dd6aa6d759..80cd3e1ea95a 100644
--- a/arch/ia64/kernel/dma-mapping.c
+++ b/arch/ia64/kernel/dma-mapping.c
@@ -36,7 +36,7 @@ long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr,
 
 void __init swiotlb_dma_init(void)
 {
-	dma_ops = &swiotlb_dma_ops;
+	dma_ops = &dma_direct_ops;
 	swiotlb_init(1);
 }
 #endif
diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h
index b4c477eb46ce..69f914667f3e 100644
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -10,8 +10,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
 {
 #if defined(CONFIG_MACH_JAZZ)
 	return &jazz_dma_ops;
-#elif defined(CONFIG_SWIOTLB)
-	return &swiotlb_dma_ops;
 #else
 	return &dma_direct_ops;
 #endif
diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c
index 3d8df2cf8be9..430a7d0aa2cb 100644
--- a/arch/powerpc/kernel/dma-swiotlb.c
+++ b/arch/powerpc/kernel/dma-swiotlb.c
@@ -50,15 +50,15 @@ const struct dma_map_ops powerpc_swiotlb_dma_ops = {
 	.alloc = __dma_nommu_alloc_coherent,
 	.free = __dma_nommu_free_coherent,
 	.mmap = dma_nommu_mmap_coherent,
-	.map_sg = swiotlb_map_sg_attrs,
-	.unmap_sg = swiotlb_unmap_sg_attrs,
+	.map_sg = dma_direct_map_sg,
+	.unmap_sg = dma_direct_unmap_sg,
 	.dma_supported = swiotlb_dma_supported,
-	.map_page = swiotlb_map_page,
-	.unmap_page = swiotlb_unmap_page,
-	.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
-	.sync_single_for_device = swiotlb_sync_single_for_device,
-	.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
-	.sync_sg_for_device = swiotlb_sync_sg_for_device,
+	.map_page = dma_direct_map_page,
+	.unmap_page = dma_direct_unmap_page,
+	.sync_single_for_cpu = dma_direct_sync_single_for_cpu,
+	.sync_single_for_device = dma_direct_sync_single_for_device,
+	.sync_sg_for_cpu = dma_direct_sync_sg_for_cpu,
+	.sync_sg_for_device = dma_direct_sync_sg_for_device,
 	.get_required_mask = swiotlb_powerpc_get_required,
 };
 
diff --git a/arch/riscv/include/asm/dma-mapping.h b/arch/riscv/include/asm/dma-mapping.h
deleted file mode 100644
index 8facc1c8fa05..000000000000
--- a/arch/riscv/include/asm/dma-mapping.h
+++ /dev/null
@@ -1,15 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#ifndef _RISCV_ASM_DMA_MAPPING_H
-#define _RISCV_ASM_DMA_MAPPING_H 1
-
-#ifdef CONFIG_SWIOTLB
-#include <linux/swiotlb.h>
-static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
-{
-	return &swiotlb_dma_ops;
-}
-#else
-#include <asm-generic/dma-mapping.h>
-#endif /* CONFIG_SWIOTLB */
-
-#endif /* _RISCV_ASM_DMA_MAPPING_H */
diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c
index bd08b9e1c9e2..5f5302028a9a 100644
--- a/arch/x86/kernel/pci-swiotlb.c
+++ b/arch/x86/kernel/pci-swiotlb.c
@@ -62,10 +62,8 @@ IOMMU_INIT(pci_swiotlb_detect_4gb,
 
 void __init pci_swiotlb_init(void)
 {
-	if (swiotlb) {
+	if (swiotlb)
 		swiotlb_init(0);
-		dma_ops = &swiotlb_dma_ops;
-	}
 }
 
 void __init pci_swiotlb_late_init(void)
diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
index 006f373f54ab..385afa2b9e17 100644
--- a/arch/x86/mm/mem_encrypt.c
+++ b/arch/x86/mm/mem_encrypt.c
@@ -380,13 +380,6 @@ void __init mem_encrypt_init(void)
 	/* Call into SWIOTLB to update the SWIOTLB DMA buffers */
 	swiotlb_update_mem_attributes();
 
-	/*
-	 * With SEV, DMA operations cannot use encryption, we need to use
-	 * SWIOTLB to bounce buffer DMA operation.
-	 */
-	if (sev_active())
-		dma_ops = &swiotlb_dma_ops;
-
 	/*
 	 * With SEV, we need to unroll the rep string I/O instructions.
 	 */
diff --git a/arch/x86/pci/sta2x11-fixup.c b/arch/x86/pci/sta2x11-fixup.c
index 7a5bafb76d77..3cdafea55ab6 100644
--- a/arch/x86/pci/sta2x11-fixup.c
+++ b/arch/x86/pci/sta2x11-fixup.c
@@ -168,7 +168,6 @@ static void sta2x11_setup_pdev(struct pci_dev *pdev)
 		return;
 	pci_set_consistent_dma_mask(pdev, STA2X11_AMBA_SIZE - 1);
 	pci_set_dma_mask(pdev, STA2X11_AMBA_SIZE - 1);
-	pdev->dev.dma_ops = &swiotlb_dma_ops;
 	pdev->dev.archdata.is_sta2x11 = true;
 
 	/* We must enable all devices as master, for audio DMA to work */
diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h
index 1aa73f4907ae..3b0a3ea3876d 100644
--- a/include/linux/dma-direct.h
+++ b/include/linux/dma-direct.h
@@ -63,7 +63,19 @@ void __dma_direct_free_pages(struct device *dev, size_t size, struct page *page)
 dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
 		unsigned long offset, size_t size, enum dma_data_direction dir,
 		unsigned long attrs);
+void dma_direct_unmap_page(struct device *dev, dma_addr_t addr,
+		size_t size, enum dma_data_direction dir, unsigned long attrs);
 int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
 		enum dma_data_direction dir, unsigned long attrs);
+void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl,
+		int nents, enum dma_data_direction dir, unsigned long attrs);
+void dma_direct_sync_single_for_device(struct device *dev,
+		dma_addr_t addr, size_t size, enum dma_data_direction dir);
+void dma_direct_sync_sg_for_device(struct device *dev,
+		struct scatterlist *sgl, int nents, enum dma_data_direction dir);
+void dma_direct_sync_single_for_cpu(struct device *dev,
+		dma_addr_t addr, size_t size, enum dma_data_direction dir);
+void dma_direct_sync_sg_for_cpu(struct device *dev,
+		struct scatterlist *sgl, int nents, enum dma_data_direction dir);
 int dma_direct_supported(struct device *dev, u64 mask);
 #endif /* _LINUX_DMA_DIRECT_H */
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 14aec0b70dd9..7c007ed7505f 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -16,8 +16,6 @@ enum swiotlb_force {
 	SWIOTLB_NO_FORCE,	/* swiotlb=noforce */
 };
 
-extern enum swiotlb_force swiotlb_force;
-
 /*
  * Maximum allowable number of contiguous slabs to map,
  * must be a power of 2.  What is the appropriate value ?
@@ -62,56 +60,44 @@ extern void swiotlb_tbl_sync_single(struct device *hwdev,
 				    size_t size, enum dma_data_direction dir,
 				    enum dma_sync_target target);
 
-/* Accessory functions. */
-
-extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
-				   unsigned long offset, size_t size,
-				   enum dma_data_direction dir,
-				   unsigned long attrs);
-extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
-			       size_t size, enum dma_data_direction dir,
-			       unsigned long attrs);
-
-extern int
-swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
-		     enum dma_data_direction dir,
-		     unsigned long attrs);
-
-extern void
-swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
-		       int nelems, enum dma_data_direction dir,
-		       unsigned long attrs);
-
-extern void
-swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
-			    size_t size, enum dma_data_direction dir);
-
-extern void
-swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
-			int nelems, enum dma_data_direction dir);
-
-extern void
-swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
-			       size_t size, enum dma_data_direction dir);
-
-extern void
-swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
-			   int nelems, enum dma_data_direction dir);
-
 extern int
 swiotlb_dma_supported(struct device *hwdev, u64 mask);
 
 #ifdef CONFIG_SWIOTLB
-extern void __init swiotlb_exit(void);
+extern enum swiotlb_force swiotlb_force;
+extern phys_addr_t io_tlb_start, io_tlb_end;
+
+static inline bool is_swiotlb_buffer(phys_addr_t paddr)
+{
+	return paddr >= io_tlb_start && paddr < io_tlb_end;
+}
+
+bool swiotlb_map(struct device *dev, phys_addr_t *phys, dma_addr_t *dma_addr,
+		size_t size, enum dma_data_direction dir, unsigned long attrs);
+void __init swiotlb_exit(void);
 unsigned int swiotlb_max_segment(void);
 #else
-static inline void swiotlb_exit(void) { }
-static inline unsigned int swiotlb_max_segment(void) { return 0; }
-#endif
+#define swiotlb_force SWIOTLB_NO_FORCE
+static inline bool is_swiotlb_buffer(phys_addr_t paddr)
+{
+	return false;
+}
+static inline bool swiotlb_map(struct device *dev, phys_addr_t *phys,
+		dma_addr_t *dma_addr, size_t size, enum dma_data_direction dir,
+		unsigned long attrs)
+{
+	return false;
+}
+static inline void swiotlb_exit(void)
+{
+}
+static inline unsigned int swiotlb_max_segment(void)
+{
+	return 0;
+}
+#endif /* CONFIG_SWIOTLB */
 
 extern void swiotlb_print_info(void);
 extern void swiotlb_set_max_segment(unsigned int);
 
-extern const struct dma_map_ops swiotlb_dma_ops;
-
 #endif /* __LINUX_SWIOTLB_H */
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index d45306473c90..85d8286a0ba2 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -13,6 +13,7 @@
 #include <linux/dma-noncoherent.h>
 #include <linux/pfn.h>
 #include <linux/set_memory.h>
+#include <linux/swiotlb.h>
 
 /*
  * Most architectures use ZONE_DMA for the first 16 Megabytes, but
@@ -209,69 +210,110 @@ void dma_direct_free(struct device *dev, size_t size,
 		dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);
 }
 
-static void dma_direct_sync_single_for_device(struct device *dev,
+#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
+    defined(CONFIG_SWIOTLB)
+void dma_direct_sync_single_for_device(struct device *dev,
 		dma_addr_t addr, size_t size, enum dma_data_direction dir)
 {
-	if (dev_is_dma_coherent(dev))
-		return;
-	arch_sync_dma_for_device(dev, dma_to_phys(dev, addr), size, dir);
+	phys_addr_t paddr = dma_to_phys(dev, addr);
+
+	if (unlikely(is_swiotlb_buffer(paddr)))
+		swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_DEVICE);
+
+	if (!dev_is_dma_coherent(dev))
+		arch_sync_dma_for_device(dev, paddr, size, dir);
 }
 
-#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE)
-static void dma_direct_sync_sg_for_device(struct device *dev,
+void dma_direct_sync_sg_for_device(struct device *dev,
 		struct scatterlist *sgl, int nents, enum dma_data_direction dir)
 {
 	struct scatterlist *sg;
 	int i;
 
-	if (dev_is_dma_coherent(dev))
-		return;
+	for_each_sg(sgl, sg, nents, i) {
+		if (unlikely(is_swiotlb_buffer(sg_phys(sg))))
+			swiotlb_tbl_sync_single(dev, sg_phys(sg), sg->length,
+					dir, SYNC_FOR_DEVICE);
 
-	for_each_sg(sgl, sg, nents, i)
-		arch_sync_dma_for_device(dev, sg_phys(sg), sg->length, dir);
+		if (!dev_is_dma_coherent(dev))
+			arch_sync_dma_for_device(dev, sg_phys(sg), sg->length,
+					dir);
+	}
 }
 #endif
 
 #if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
-    defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
-static void dma_direct_sync_single_for_cpu(struct device *dev,
+    defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \
+    defined(CONFIG_SWIOTLB)
+void dma_direct_sync_single_for_cpu(struct device *dev,
 		dma_addr_t addr, size_t size, enum dma_data_direction dir)
 {
-	if (dev_is_dma_coherent(dev))
-		return;
-	arch_sync_dma_for_cpu(dev, dma_to_phys(dev, addr), size, dir);
-	arch_sync_dma_for_cpu_all(dev);
+	phys_addr_t paddr = dma_to_phys(dev, addr);
+
+	if (!dev_is_dma_coherent(dev)) {
+		arch_sync_dma_for_cpu(dev, paddr, size, dir);
+		arch_sync_dma_for_cpu_all(dev);
+	}
+
+	if (unlikely(is_swiotlb_buffer(paddr)))
+		swiotlb_tbl_sync_single(dev, paddr, size, dir, SYNC_FOR_CPU);
 }
 
-static void dma_direct_sync_sg_for_cpu(struct device *dev,
+void dma_direct_sync_sg_for_cpu(struct device *dev,
 		struct scatterlist *sgl, int nents, enum dma_data_direction dir)
 {
 	struct scatterlist *sg;
 	int i;
 
-	if (dev_is_dma_coherent(dev))
-		return;
+	for_each_sg(sgl, sg, nents, i) {
+		if (!dev_is_dma_coherent(dev))
+			arch_sync_dma_for_cpu(dev, sg_phys(sg), sg->length, dir);
+	
+		if (unlikely(is_swiotlb_buffer(sg_phys(sg))))
+			swiotlb_tbl_sync_single(dev, sg_phys(sg), sg->length, dir,
+					SYNC_FOR_CPU);
+	}
 
-	for_each_sg(sgl, sg, nents, i)
-		arch_sync_dma_for_cpu(dev, sg_phys(sg), sg->length, dir);
-	arch_sync_dma_for_cpu_all(dev);
+	if (!dev_is_dma_coherent(dev))
+		arch_sync_dma_for_cpu_all(dev);
 }
 
-static void dma_direct_unmap_page(struct device *dev, dma_addr_t addr,
+void dma_direct_unmap_page(struct device *dev, dma_addr_t addr,
 		size_t size, enum dma_data_direction dir, unsigned long attrs)
 {
+	phys_addr_t phys = dma_to_phys(dev, addr);
+
 	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
 		dma_direct_sync_single_for_cpu(dev, addr, size, dir);
+
+	if (unlikely(is_swiotlb_buffer(phys)))
+		swiotlb_tbl_unmap_single(dev, phys, size, dir, attrs);
 }
 
-static void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl,
+void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl,
+		int nents, enum dma_data_direction dir, unsigned long attrs)
+{
+	struct scatterlist *sg;
+	int i;
+
+	for_each_sg(sgl, sg, nents, i)
+		dma_direct_unmap_page(dev, sg->dma_address, sg_dma_len(sg), dir,
+			     attrs);
+}
+#else
+void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl,
 		int nents, enum dma_data_direction dir, unsigned long attrs)
 {
-	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
-		dma_direct_sync_sg_for_cpu(dev, sgl, nents, dir);
 }
 #endif
 
+static inline bool dma_direct_possible(struct device *dev, dma_addr_t dma_addr,
+		size_t size)
+{
+	return swiotlb_force != SWIOTLB_FORCE &&
+		(!dev || dma_capable(dev, dma_addr, size));
+}
+
 dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
 		unsigned long offset, size_t size, enum dma_data_direction dir,
 		unsigned long attrs)
@@ -279,13 +321,14 @@ dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
 	phys_addr_t phys = page_to_phys(page) + offset;
 	dma_addr_t dma_addr = phys_to_dma(dev, phys);
 
-	if (unlikely(dev && !dma_capable(dev, dma_addr, size))) {
+	if (unlikely(!dma_direct_possible(dev, dma_addr, size)) &&
+	    !swiotlb_map(dev, &phys, &dma_addr, size, dir, attrs)) {
 		report_addr(dev, dma_addr, size);
 		return DMA_MAPPING_ERROR;
 	}
 
-	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
-		dma_direct_sync_single_for_device(dev, dma_addr, size, dir);
+	if (!dev_is_dma_coherent(dev) && !(attrs & DMA_ATTR_SKIP_CPU_SYNC))
+		arch_sync_dma_for_device(dev, phys, size, dir);
 	return dma_addr;
 }
 
@@ -299,11 +342,15 @@ int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
 		sg->dma_address = dma_direct_map_page(dev, sg_page(sg),
 				sg->offset, sg->length, dir, attrs);
 		if (sg->dma_address == DMA_MAPPING_ERROR)
-			return 0;
+			goto out_unmap;
 		sg_dma_len(sg) = sg->length;
 	}
 
 	return nents;
+
+out_unmap:
+	dma_direct_unmap_sg(dev, sgl, i, dir, attrs | DMA_ATTR_SKIP_CPU_SYNC);
+	return 0;
 }
 
 /*
@@ -331,12 +378,14 @@ const struct dma_map_ops dma_direct_ops = {
 	.free			= dma_direct_free,
 	.map_page		= dma_direct_map_page,
 	.map_sg			= dma_direct_map_sg,
-#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE)
+#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
+    defined(CONFIG_SWIOTLB)
 	.sync_single_for_device	= dma_direct_sync_single_for_device,
 	.sync_sg_for_device	= dma_direct_sync_sg_for_device,
 #endif
 #if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
-    defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL)
+    defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \
+    defined(CONFIG_SWIOTLB)
 	.sync_single_for_cpu	= dma_direct_sync_single_for_cpu,
 	.sync_sg_for_cpu	= dma_direct_sync_sg_for_cpu,
 	.unmap_page		= dma_direct_unmap_page,
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 2e126bac5d7d..d6361776dc5c 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -21,7 +21,6 @@
 
 #include <linux/cache.h>
 #include <linux/dma-direct.h>
-#include <linux/dma-noncoherent.h>
 #include <linux/mm.h>
 #include <linux/export.h>
 #include <linux/spinlock.h>
@@ -65,7 +64,7 @@ enum swiotlb_force swiotlb_force;
  * swiotlb_tbl_sync_single_*, to see if the memory was in fact allocated by this
  * API.
  */
-static phys_addr_t io_tlb_start, io_tlb_end;
+phys_addr_t io_tlb_start, io_tlb_end;
 
 /*
  * The number of IO TLB blocks (in groups of 64) between io_tlb_start and
@@ -383,11 +382,6 @@ void __init swiotlb_exit(void)
 	max_segment = 0;
 }
 
-static int is_swiotlb_buffer(phys_addr_t paddr)
-{
-	return paddr >= io_tlb_start && paddr < io_tlb_end;
-}
-
 /*
  * Bounce: copy the swiotlb buffer back to the original dma location
  */
@@ -623,221 +617,36 @@ void swiotlb_tbl_sync_single(struct device *hwdev, phys_addr_t tlb_addr,
 	}
 }
 
-static dma_addr_t swiotlb_bounce_page(struct device *dev, phys_addr_t *phys,
+/*
+ * Create a swiotlb mapping for the buffer at @phys, and in case of DMAing
+ * to the device copy the data into it as well.
+ */
+bool swiotlb_map(struct device *dev, phys_addr_t *phys, dma_addr_t *dma_addr,
 		size_t size, enum dma_data_direction dir, unsigned long attrs)
 {
-	dma_addr_t dma_addr;
+	trace_swiotlb_bounced(dev, *dma_addr, size, swiotlb_force);
 
 	if (unlikely(swiotlb_force == SWIOTLB_NO_FORCE)) {
 		dev_warn_ratelimited(dev,
 			"Cannot do DMA to address %pa\n", phys);
-		return DMA_MAPPING_ERROR;
+		return false;
 	}
 
 	/* Oh well, have to allocate and map a bounce buffer. */
 	*phys = swiotlb_tbl_map_single(dev, __phys_to_dma(dev, io_tlb_start),
 			*phys, size, dir, attrs);
 	if (*phys == DMA_MAPPING_ERROR)
-		return DMA_MAPPING_ERROR;
+		return false;
 
 	/* Ensure that the address returned is DMA'ble */
-	dma_addr = __phys_to_dma(dev, *phys);
-	if (unlikely(!dma_capable(dev, dma_addr, size))) {
+	*dma_addr = __phys_to_dma(dev, *phys);
+	if (unlikely(!dma_capable(dev, *dma_addr, size))) {
 		swiotlb_tbl_unmap_single(dev, *phys, size, dir,
 			attrs | DMA_ATTR_SKIP_CPU_SYNC);
-		return DMA_MAPPING_ERROR;
-	}
-
-	return dma_addr;
-}
-
-/*
- * Map a single buffer of the indicated size for DMA in streaming mode.  The
- * physical address to use is returned.
- *
- * Once the device is given the dma address, the device owns this memory until
- * either swiotlb_unmap_page or swiotlb_dma_sync_single is performed.
- */
-dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
-			    unsigned long offset, size_t size,
-			    enum dma_data_direction dir,
-			    unsigned long attrs)
-{
-	phys_addr_t phys = page_to_phys(page) + offset;
-	dma_addr_t dev_addr = phys_to_dma(dev, phys);
-
-	BUG_ON(dir == DMA_NONE);
-	/*
-	 * If the address happens to be in the device's DMA window,
-	 * we can safely return the device addr and not worry about bounce
-	 * buffering it.
-	 */
-	if (!dma_capable(dev, dev_addr, size) ||
-	    swiotlb_force == SWIOTLB_FORCE) {
-		trace_swiotlb_bounced(dev, dev_addr, size, swiotlb_force);
-		dev_addr = swiotlb_bounce_page(dev, &phys, size, dir, attrs);
+		return false;
 	}
 
-	if (!dev_is_dma_coherent(dev) &&
-	    (attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0 &&
-	    dev_addr != DMA_MAPPING_ERROR)
-		arch_sync_dma_for_device(dev, phys, size, dir);
-
-	return dev_addr;
-}
-
-/*
- * Unmap a single streaming mode DMA translation.  The dma_addr and size must
- * match what was provided for in a previous swiotlb_map_page call.  All
- * other usages are undefined.
- *
- * After this call, reads by the cpu to the buffer are guaranteed to see
- * whatever the device wrote there.
- */
-void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
-			size_t size, enum dma_data_direction dir,
-			unsigned long attrs)
-{
-	phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
-
-	BUG_ON(dir == DMA_NONE);
-
-	if (!dev_is_dma_coherent(hwdev) &&
-	    (attrs & DMA_ATTR_SKIP_CPU_SYNC) == 0)
-		arch_sync_dma_for_cpu(hwdev, paddr, size, dir);
-
-	if (is_swiotlb_buffer(paddr))
-		swiotlb_tbl_unmap_single(hwdev, paddr, size, dir, attrs);
-}
-
-/*
- * Make physical memory consistent for a single streaming mode DMA translation
- * after a transfer.
- *
- * If you perform a swiotlb_map_page() but wish to interrogate the buffer
- * using the cpu, yet do not wish to teardown the dma mapping, you must
- * call this function before doing so.  At the next point you give the dma
- * address back to the card, you must first perform a
- * swiotlb_dma_sync_for_device, and then the device again owns the buffer
- */
-static void
-swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
-		    size_t size, enum dma_data_direction dir,
-		    enum dma_sync_target target)
-{
-	phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
-
-	BUG_ON(dir == DMA_NONE);
-
-	if (!dev_is_dma_coherent(hwdev) && target == SYNC_FOR_CPU)
-		arch_sync_dma_for_cpu(hwdev, paddr, size, dir);
-
-	if (is_swiotlb_buffer(paddr))
-		swiotlb_tbl_sync_single(hwdev, paddr, size, dir, target);
-
-	if (!dev_is_dma_coherent(hwdev) && target == SYNC_FOR_DEVICE)
-		arch_sync_dma_for_device(hwdev, paddr, size, dir);
-}
-
-void
-swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
-			    size_t size, enum dma_data_direction dir)
-{
-	swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_CPU);
-}
-
-void
-swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
-			       size_t size, enum dma_data_direction dir)
-{
-	swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_DEVICE);
-}
-
-/*
- * Map a set of buffers described by scatterlist in streaming mode for DMA.
- * This is the scatter-gather version of the above swiotlb_map_page
- * interface.  Here the scatter gather list elements are each tagged with the
- * appropriate dma address and length.  They are obtained via
- * sg_dma_{address,length}(SG).
- *
- * Device ownership issues as mentioned above for swiotlb_map_page are the
- * same here.
- */
-int
-swiotlb_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nelems,
-		     enum dma_data_direction dir, unsigned long attrs)
-{
-	struct scatterlist *sg;
-	int i;
-
-	for_each_sg(sgl, sg, nelems, i) {
-		sg->dma_address = swiotlb_map_page(dev, sg_page(sg), sg->offset,
-				sg->length, dir, attrs);
-		if (sg->dma_address == DMA_MAPPING_ERROR)
-			goto out_error;
-		sg_dma_len(sg) = sg->length;
-	}
-
-	return nelems;
-
-out_error:
-	swiotlb_unmap_sg_attrs(dev, sgl, i, dir,
-			attrs | DMA_ATTR_SKIP_CPU_SYNC);
-	sg_dma_len(sgl) = 0;
-	return 0;
-}
-
-/*
- * Unmap a set of streaming mode DMA translations.  Again, cpu read rules
- * concerning calls here are the same as for swiotlb_unmap_page() above.
- */
-void
-swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
-		       int nelems, enum dma_data_direction dir,
-		       unsigned long attrs)
-{
-	struct scatterlist *sg;
-	int i;
-
-	BUG_ON(dir == DMA_NONE);
-
-	for_each_sg(sgl, sg, nelems, i)
-		swiotlb_unmap_page(hwdev, sg->dma_address, sg_dma_len(sg), dir,
-			     attrs);
-}
-
-/*
- * Make physical memory consistent for a set of streaming mode DMA translations
- * after a transfer.
- *
- * The same as swiotlb_sync_single_* but for a scatter-gather list, same rules
- * and usage.
- */
-static void
-swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sgl,
-		int nelems, enum dma_data_direction dir,
-		enum dma_sync_target target)
-{
-	struct scatterlist *sg;
-	int i;
-
-	for_each_sg(sgl, sg, nelems, i)
-		swiotlb_sync_single(hwdev, sg->dma_address,
-				    sg_dma_len(sg), dir, target);
-}
-
-void
-swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
-			int nelems, enum dma_data_direction dir)
-{
-	swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_CPU);
-}
-
-void
-swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
-			   int nelems, enum dma_data_direction dir)
-{
-	swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_DEVICE);
+	return true;
 }
 
 /*
@@ -851,18 +660,3 @@ swiotlb_dma_supported(struct device *hwdev, u64 mask)
 {
 	return __phys_to_dma(hwdev, io_tlb_end - 1) <= mask;
 }
-
-const struct dma_map_ops swiotlb_dma_ops = {
-	.alloc			= dma_direct_alloc,
-	.free			= dma_direct_free,
-	.sync_single_for_cpu	= swiotlb_sync_single_for_cpu,
-	.sync_single_for_device	= swiotlb_sync_single_for_device,
-	.sync_sg_for_cpu	= swiotlb_sync_sg_for_cpu,
-	.sync_sg_for_device	= swiotlb_sync_sg_for_device,
-	.map_sg			= swiotlb_map_sg_attrs,
-	.unmap_sg		= swiotlb_unmap_sg_attrs,
-	.map_page		= swiotlb_map_page,
-	.unmap_page		= swiotlb_unmap_page,
-	.dma_supported		= dma_direct_supported,
-};
-EXPORT_SYMBOL(swiotlb_dma_ops);
