Merge tag 'dma-mapping-4.20' of git://git.infradead.org/users/hch/dma-mapping

Pull dma mapping updates from Christoph Hellwig:
 "First batch of dma-mapping changes for 4.20.

  There will be a second PR as some big changes were only applied just
  before the end of the merge window, and I want to give them a few more
  days in linux-next.

  Summary:

   - mostly more consolidation of the direct mapping code, including
     converting over hexagon, and merging the coherent and non-coherent
     code into a single dma_map_ops instance (me)

   - cleanups for the dma_configure/dma_unconfigure callchains (me)

   - better handling of dma_masks in odd setups (me, Alexander Duyck)

   - better debugging of passing vmalloc address to the DMA API (Stephen
     Boyd)

   - CMA command line parsing fix (He Zhe)"

* tag 'dma-mapping-4.20' of git://git.infradead.org/users/hch/dma-mapping: (27 commits)
  dma-direct: respect DMA_ATTR_NO_WARN
  dma-mapping: translate __GFP_NOFAIL to DMA_ATTR_NO_WARN
  dma-direct: document the zone selection logic
  dma-debug: Check for drivers mapping invalid addresses in dma_map_single()
  dma-direct: fix return value of dma_direct_supported
  dma-mapping: move dma_default_get_required_mask under ifdef
  dma-direct: always allow dma mask <= physiscal memory size
  dma-direct: implement complete bus_dma_mask handling
  dma-direct: refine dma_direct_alloc zone selection
  dma-direct: add an explicit dma_direct_get_required_mask
  dma-mapping: make the get_required_mask method available unconditionally
  unicore32: remove swiotlb support
  Revert "dma-mapping: clear dev->dma_ops in arch_teardown_dma_ops"
  dma-mapping: support non-coherent devices in dma_common_get_sgtable
  dma-mapping: consolidate the dma mmap implementations
  dma-mapping: merge direct and noncoherent ops
  dma-mapping: move the dma_coherent flag to struct device
  MIPS: don't select DMA_MAYBE_COHERENT from DMA_PERDEV_COHERENT
  dma-mapping: add the missing ARCH_HAS_SYNC_DMA_FOR_CPU_ALL declaration
  dma-mapping: fix panic caused by passing empty cma command line argument
  ...

43 files changed, 92 insertions, 426 deletions

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index a045f30860477..e98c6b8e6186e 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -9,6 +9,7 @@
 config ARC
 	def_bool y
 	select ARC_TIMERS
+	select ARCH_HAS_DMA_COHERENT_TO_PFN
 	select ARCH_HAS_PTE_SPECIAL
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
@@ -17,8 +18,7 @@ config ARC
 	select BUILDTIME_EXTABLE_SORT
 	select CLONE_BACKWARDS
 	select COMMON_CLK
-	select DMA_NONCOHERENT_OPS
-	select DMA_NONCOHERENT_MMAP
+	select DMA_DIRECT_OPS
 	select GENERIC_ATOMIC64 if !ISA_ARCV2 || !(ARC_HAS_LL64 && ARC_HAS_LLSC)
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_FIND_FIRST_BIT
diff --git a/arch/arc/mm/dma.c b/arch/arc/mm/dma.c
index c75d5c3470e35..db203ff69ccfa 100644
--- a/arch/arc/mm/dma.c
+++ b/arch/arc/mm/dma.c
@@ -84,29 +84,10 @@ void arch_dma_free(struct device *dev, size_t size, void *vaddr,
 	__free_pages(page, get_order(size));
 }
 
-int arch_dma_mmap(struct device *dev, struct vm_area_struct *vma,
-		void *cpu_addr, dma_addr_t dma_addr, size_t size,
-		unsigned long attrs)
+long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr,
+		dma_addr_t dma_addr)
 {
-	unsigned long user_count = vma_pages(vma);
-	unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT;
-	unsigned long pfn = __phys_to_pfn(dma_addr);
-	unsigned long off = vma->vm_pgoff;
-	int ret = -ENXIO;
-
-	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
-	if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))
-		return ret;
-
-	if (off < count && user_count <= (count - off)) {
-		ret = remap_pfn_range(vma, vma->vm_start,
-				      pfn + off,
-				      user_count << PAGE_SHIFT,
-				      vma->vm_page_prot);
-	}
-
-	return ret;
+	return __phys_to_pfn(dma_addr);
 }
 
 /*
@@ -167,7 +148,7 @@ void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
 }
 
 /*
- * Plug in coherent or noncoherent dma ops
+ * Plug in direct dma map ops.
  */
 void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
 			const struct iommu_ops *iommu, bool coherent)
@@ -175,13 +156,11 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
 	/*
 	 * IOC hardware snoops all DMA traffic keeping the caches consistent
 	 * with memory - eliding need for any explicit cache maintenance of
-	 * DMA buffers - so we can use dma_direct cache ops.
+	 * DMA buffers.
 	 */
-	if (is_isa_arcv2() && ioc_enable && coherent) {
-		set_dma_ops(dev, &dma_direct_ops);
-		dev_info(dev, "use dma_direct_ops cache ops\n");
-	} else {
-		set_dma_ops(dev, &dma_noncoherent_ops);
-		dev_info(dev, "use dma_noncoherent_ops cache ops\n");
-	}
+	if (is_isa_arcv2() && ioc_enable && coherent)
+		dev->dma_coherent = true;
+
+	dev_info(dev, "use %sncoherent DMA ops\n",
+		 dev->dma_coherent ? "" : "non");
 }
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 8436f6ade57dd..965b7c846ecb1 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -100,8 +100,10 @@ static inline unsigned long dma_max_pfn(struct device *dev)
 extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
 			       const struct iommu_ops *iommu, bool coherent);
 
+#ifdef CONFIG_MMU
 #define arch_teardown_dma_ops arch_teardown_dma_ops
 extern void arch_teardown_dma_ops(struct device *dev);
+#endif
 
 /* do not use this function in a driver */
 static inline bool is_device_dma_coherent(struct device *dev)
diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c
index f448a0663b106..712416ecd8e6c 100644
--- a/arch/arm/mm/dma-mapping-nommu.c
+++ b/arch/arm/mm/dma-mapping-nommu.c
@@ -47,7 +47,8 @@ static void *arm_nommu_dma_alloc(struct device *dev, size_t size,
 	 */
 
 	if (attrs & DMA_ATTR_NON_CONSISTENT)
-		return dma_direct_alloc(dev, size, dma_handle, gfp, attrs);
+		return dma_direct_alloc_pages(dev, size, dma_handle, gfp,
+				attrs);
 
 	ret = dma_alloc_from_global_coherent(size, dma_handle);
 
@@ -70,7 +71,7 @@ static void arm_nommu_dma_free(struct device *dev, size_t size,
 			       unsigned long attrs)
 {
 	if (attrs & DMA_ATTR_NON_CONSISTENT) {
-		dma_direct_free(dev, size, cpu_addr, dma_addr, attrs);
+		dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);
 	} else {
 		int ret = dma_release_from_global_coherent(get_order(size),
 							   cpu_addr);
@@ -90,7 +91,7 @@ static int arm_nommu_dma_mmap(struct device *dev, struct vm_area_struct *vma,
 	if (dma_mmap_from_global_coherent(vma, cpu_addr, size, &ret))
 		return ret;
 
-	return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
+	return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
 }
 
 
@@ -237,7 +238,3 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
 
 	set_dma_ops(dev, dma_ops);
 }
-
-void arch_teardown_dma_ops(struct device *dev)
-{
-}
diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
index a641b0bf16115..f65a084607fd4 100644
--- a/arch/c6x/Kconfig
+++ b/arch/c6x/Kconfig
@@ -9,7 +9,7 @@ config C6X
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 	select CLKDEV_LOOKUP
-	select DMA_NONCOHERENT_OPS
+	select DMA_DIRECT_OPS
 	select GENERIC_ATOMIC64
 	select GENERIC_IRQ_SHOW
 	select HAVE_ARCH_TRACEHOOK
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index 89a4b22f34d9b..3ef46522e89f1 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -4,6 +4,7 @@ comment "Linux Kernel Configuration for Hexagon"
 
 config HEXAGON
 	def_bool y
+	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 	select ARCH_NO_PREEMPT
 	select HAVE_OPROFILE
 	# Other pending projects/to-do items.
@@ -29,6 +30,7 @@ config HEXAGON
 	select GENERIC_CLOCKEVENTS_BROADCAST
 	select MODULES_USE_ELF_RELA
 	select GENERIC_CPU_DEVICES
+	select DMA_DIRECT_OPS
 	---help---
 	  Qualcomm Hexagon is a processor architecture designed for high
 	  performance and low power across a wide variety of applications.
diff --git a/arch/hexagon/include/asm/Kbuild b/arch/hexagon/include/asm/Kbuild
index dd2fd9c0d292b..47c4da3d64a4e 100644
--- a/arch/hexagon/include/asm/Kbuild
+++ b/arch/hexagon/include/asm/Kbuild
@@ -6,6 +6,7 @@ generic-y += compat.h
 generic-y += current.h
 generic-y += device.h
 generic-y += div64.h
+generic-y += dma-mapping.h
 generic-y += emergency-restart.h
 generic-y += extable.h
 generic-y += fb.h
diff --git a/arch/hexagon/include/asm/dma-mapping.h b/arch/hexagon/include/asm/dma-mapping.h
deleted file mode 100644
index 263f6acbfb0f0..0000000000000
--- a/arch/hexagon/include/asm/dma-mapping.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * DMA operations for the Hexagon architecture
- *
- * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- */
-
-#ifndef _ASM_DMA_MAPPING_H
-#define _ASM_DMA_MAPPING_H
-
-#include <linux/types.h>
-#include <linux/cache.h>
-#include <linux/mm.h>
-#include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
-#include <asm/io.h>
-
-struct device;
-
-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;
-}
-
-#endif
diff --git a/arch/hexagon/kernel/dma.c b/arch/hexagon/kernel/dma.c
index 7ebe7ad19d155..7066993744448 100644
--- a/arch/hexagon/kernel/dma.c
+++ b/arch/hexagon/kernel/dma.c
@@ -18,32 +18,19 @@
  * 02110-1301, USA.
  */
 
-#include <linux/dma-mapping.h>
-#include <linux/dma-direct.h>
+#include <linux/dma-noncoherent.h>
 #include <linux/bootmem.h>
 #include <linux/genalloc.h>
-#include <asm/dma-mapping.h>
 #include <linux/module.h>
 #include <asm/page.h>
 
-#define HEXAGON_MAPPING_ERROR	0
-
-const struct dma_map_ops *dma_ops;
-EXPORT_SYMBOL(dma_ops);
-
-static inline void *dma_addr_to_virt(dma_addr_t dma_addr)
-{
-	return phys_to_virt((unsigned long) dma_addr);
-}
-
 static struct gen_pool *coherent_pool;
 
 
 /* Allocates from a pool of uncached memory that was reserved at boot time */
 
-static void *hexagon_dma_alloc_coherent(struct device *dev, size_t size,
-				 dma_addr_t *dma_addr, gfp_t flag,
-				 unsigned long attrs)
+void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_addr,
+		gfp_t flag, unsigned long attrs)
 {
 	void *ret;
 
@@ -75,58 +62,17 @@ static void *hexagon_dma_alloc_coherent(struct device *dev, size_t size,
 	return ret;
 }
 
-static void hexagon_free_coherent(struct device *dev, size_t size, void *vaddr,
-				  dma_addr_t dma_addr, unsigned long attrs)
+void arch_dma_free(struct device *dev, size_t size, void *vaddr,
+		dma_addr_t dma_addr, unsigned long attrs)
 {
 	gen_pool_free(coherent_pool, (unsigned long) vaddr, size);
 }
 
-static int check_addr(const char *name, struct device *hwdev,
-		      dma_addr_t bus, size_t size)
-{
-	if (hwdev && hwdev->dma_mask && !dma_capable(hwdev, bus, size)) {
-		if (*hwdev->dma_mask >= DMA_BIT_MASK(32))
-			printk(KERN_ERR
-				"%s: overflow %Lx+%zu of device mask %Lx\n",
-				name, (long long)bus, size,
-				(long long)*hwdev->dma_mask);
-		return 0;
-	}
-	return 1;
-}
-
-static int hexagon_map_sg(struct device *hwdev, struct scatterlist *sg,
-			  int nents, enum dma_data_direction dir,
-			  unsigned long attrs)
+void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
+		size_t size, enum dma_data_direction dir)
 {
-	struct scatterlist *s;
-	int i;
-
-	WARN_ON(nents == 0 || sg[0].length == 0);
-
-	for_each_sg(sg, s, nents, i) {
-		s->dma_address = sg_phys(s);
-		if (!check_addr("map_sg", hwdev, s->dma_address, s->length))
-			return 0;
-
-		s->dma_length = s->length;
+	void *addr = phys_to_virt(paddr);
 
-		if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
-			continue;
-
-		flush_dcache_range(dma_addr_to_virt(s->dma_address),
-				   dma_addr_to_virt(s->dma_address + s->length));
-	}
-
-	return nents;
-}
-
-/*
- * address is virtual
- */
-static inline void dma_sync(void *addr, size_t size,
-			    enum dma_data_direction dir)
-{
 	switch (dir) {
 	case DMA_TO_DEVICE:
 		hexagon_clean_dcache_range((unsigned long) addr,
@@ -144,76 +90,3 @@ static inline void dma_sync(void *addr, size_t size,
 		BUG();
 	}
 }
-
-/**
- * hexagon_map_page() - maps an address for device DMA
- * @dev:	pointer to DMA device
- * @page:	pointer to page struct of DMA memory
- * @offset:	offset within page
- * @size:	size of memory to map
- * @dir:	transfer direction
- * @attrs:	pointer to DMA attrs (not used)
- *
- * Called to map a memory address to a DMA address prior
- * to accesses to/from device.
- *
- * We don't particularly have many hoops to jump through
- * so far.  Straight translation between phys and virtual.
- *
- * DMA is not cache coherent so sync is necessary; this
- * seems to be a convenient place to do it.
- *
- */
-static dma_addr_t hexagon_map_page(struct device *dev, struct page *page,
-				   unsigned long offset, size_t size,
-				   enum dma_data_direction dir,
-				   unsigned long attrs)
-{
-	dma_addr_t bus = page_to_phys(page) + offset;
-	WARN_ON(size == 0);
-
-	if (!check_addr("map_single", dev, bus, size))
-		return HEXAGON_MAPPING_ERROR;
-
-	if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
-		dma_sync(dma_addr_to_virt(bus), size, dir);
-
-	return bus;
-}
-
-static void hexagon_sync_single_for_cpu(struct device *dev,
-					dma_addr_t dma_handle, size_t size,
-					enum dma_data_direction dir)
-{
-	dma_sync(dma_addr_to_virt(dma_handle), size, dir);
-}
-
-static void hexagon_sync_single_for_device(struct device *dev,
-					dma_addr_t dma_handle, size_t size,
-					enum dma_data_direction dir)
-{
-	dma_sync(dma_addr_to_virt(dma_handle), size, dir);
-}
-
-static int hexagon_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
-	return dma_addr == HEXAGON_MAPPING_ERROR;
-}
-
-const struct dma_map_ops hexagon_dma_ops = {
-	.alloc		= hexagon_dma_alloc_coherent,
-	.free		= hexagon_free_coherent,
-	.map_sg		= hexagon_map_sg,
-	.map_page	= hexagon_map_page,
-	.sync_single_for_cpu = hexagon_sync_single_for_cpu,
-	.sync_single_for_device = hexagon_sync_single_for_device,
-	.mapping_error	= hexagon_mapping_error,
-};
-
-void __init hexagon_dma_init(void)
-{
-	if (dma_ops)
-		return;
-
-	dma_ops = &hexagon_dma_ops;
-}
diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h
index 76e4d6632d68f..522745ae67bb6 100644
--- a/arch/ia64/include/asm/dma-mapping.h
+++ b/arch/ia64/include/asm/dma-mapping.h
@@ -10,8 +10,6 @@
 #include <linux/scatterlist.h>
 #include <linux/dma-debug.h>
 
-#define ARCH_HAS_DMA_GET_REQUIRED_MASK
-
 extern const struct dma_map_ops *dma_ops;
 extern struct ia64_machine_vector ia64_mv;
 extern void set_iommu_machvec(void);
diff --git a/arch/ia64/include/asm/machvec.h b/arch/ia64/include/asm/machvec.h
index 267f4f1701916..5133739966bcf 100644
--- a/arch/ia64/include/asm/machvec.h
+++ b/arch/ia64/include/asm/machvec.h
@@ -44,7 +44,6 @@ typedef void ia64_mv_kernel_launch_event_t(void);
 
 /* DMA-mapping interface: */
 typedef void ia64_mv_dma_init (void);
-typedef u64 ia64_mv_dma_get_required_mask (struct device *);
 typedef const struct dma_map_ops *ia64_mv_dma_get_ops(struct device *);
 
 /*
@@ -127,7 +126,6 @@ extern void machvec_tlb_migrate_finish (struct mm_struct *);
 #  define platform_global_tlb_purge	ia64_mv.global_tlb_purge
 #  define platform_tlb_migrate_finish	ia64_mv.tlb_migrate_finish
 #  define platform_dma_init		ia64_mv.dma_init
-#  define platform_dma_get_required_mask ia64_mv.dma_get_required_mask
 #  define platform_dma_get_ops		ia64_mv.dma_get_ops
 #  define platform_irq_to_vector	ia64_mv.irq_to_vector
 #  define platform_local_vector_to_irq	ia64_mv.local_vector_to_irq
@@ -171,7 +169,6 @@ struct ia64_machine_vector {
 	ia64_mv_global_tlb_purge_t *global_tlb_purge;
 	ia64_mv_tlb_migrate_finish_t *tlb_migrate_finish;
 	ia64_mv_dma_init *dma_init;
-	ia64_mv_dma_get_required_mask *dma_get_required_mask;
 	ia64_mv_dma_get_ops *dma_get_ops;
 	ia64_mv_irq_to_vector *irq_to_vector;
 	ia64_mv_local_vector_to_irq *local_vector_to_irq;
@@ -211,7 +208,6 @@ struct ia64_machine_vector {
 	platform_global_tlb_purge,		\
 	platform_tlb_migrate_finish,		\
 	platform_dma_init,			\
-	platform_dma_get_required_mask,		\
 	platform_dma_get_ops,			\
 	platform_irq_to_vector,			\
 	platform_local_vector_to_irq,		\
@@ -286,9 +282,6 @@ extern const struct dma_map_ops *dma_get_ops(struct device *);
 #ifndef platform_dma_get_ops
 # define platform_dma_get_ops		dma_get_ops
 #endif
-#ifndef platform_dma_get_required_mask
-# define  platform_dma_get_required_mask	ia64_dma_get_required_mask
-#endif
 #ifndef platform_irq_to_vector
 # define platform_irq_to_vector		__ia64_irq_to_vector
 #endif
diff --git a/arch/ia64/include/asm/machvec_init.h b/arch/ia64/include/asm/machvec_init.h
index 2b32fd06b7c64..2aafb69a37874 100644
--- a/arch/ia64/include/asm/machvec_init.h
+++ b/arch/ia64/include/asm/machvec_init.h
@@ -4,7 +4,6 @@
 
 extern ia64_mv_send_ipi_t ia64_send_ipi;
 extern ia64_mv_global_tlb_purge_t ia64_global_tlb_purge;
-extern ia64_mv_dma_get_required_mask ia64_dma_get_required_mask;
 extern ia64_mv_irq_to_vector __ia64_irq_to_vector;
 extern ia64_mv_local_vector_to_irq __ia64_local_vector_to_irq;
 extern ia64_mv_pci_get_legacy_mem_t ia64_pci_get_legacy_mem;
diff --git a/arch/ia64/include/asm/machvec_sn2.h b/arch/ia64/include/asm/machvec_sn2.h
index ece9fa85be886..b5153d3002897 100644
--- a/arch/ia64/include/asm/machvec_sn2.h
+++ b/arch/ia64/include/asm/machvec_sn2.h
@@ -55,7 +55,6 @@ extern ia64_mv_readb_t __sn_readb_relaxed;
 extern ia64_mv_readw_t __sn_readw_relaxed;
 extern ia64_mv_readl_t __sn_readl_relaxed;
 extern ia64_mv_readq_t __sn_readq_relaxed;
-extern ia64_mv_dma_get_required_mask	sn_dma_get_required_mask;
 extern ia64_mv_dma_init			sn_dma_init;
 extern ia64_mv_migrate_t		sn_migrate;
 extern ia64_mv_kernel_launch_event_t	sn_kernel_launch_event;
@@ -100,7 +99,6 @@ extern ia64_mv_pci_fixup_bus_t		sn_pci_fixup_bus;
 #define platform_pci_get_legacy_mem	sn_pci_get_legacy_mem
 #define platform_pci_legacy_read	sn_pci_legacy_read
 #define platform_pci_legacy_write	sn_pci_legacy_write
-#define platform_dma_get_required_mask	sn_dma_get_required_mask
 #define platform_dma_init		sn_dma_init
 #define platform_migrate		sn_migrate
 #define platform_kernel_launch_event    sn_kernel_launch_event
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 7ccc64d5fe3ee..5d71800df4313 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -568,32 +568,6 @@ static void __init set_pci_dfl_cacheline_size(void)
 	pci_dfl_cache_line_size = (1 << cci.pcci_line_size) / 4;
 }
 
-u64 ia64_dma_get_required_mask(struct device *dev)
-{
-	u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT);
-	u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT));
-	u64 mask;
-
-	if (!high_totalram) {
-		/* convert to mask just covering totalram */
-		low_totalram = (1 << (fls(low_totalram) - 1));
-		low_totalram += low_totalram - 1;
-		mask = low_totalram;
-	} else {
-		high_totalram = (1 << (fls(high_totalram) - 1));
-		high_totalram += high_totalram - 1;
-		mask = (((u64)high_totalram) << 32) + 0xffffffff;
-	}
-	return mask;
-}
-EXPORT_SYMBOL_GPL(ia64_dma_get_required_mask);
-
-u64 dma_get_required_mask(struct device *dev)
-{
-	return platform_dma_get_required_mask(dev);
-}
-EXPORT_SYMBOL_GPL(dma_get_required_mask);
-
 static int __init pcibios_init(void)
 {
 	set_pci_dfl_cacheline_size();
diff --git a/arch/ia64/sn/pci/pci_dma.c b/arch/ia64/sn/pci/pci_dma.c
index 74c934a997bb4..96eb2567718a2 100644
--- a/arch/ia64/sn/pci/pci_dma.c
+++ b/arch/ia64/sn/pci/pci_dma.c
@@ -344,11 +344,10 @@ static int sn_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 	return 0;
 }
 
-u64 sn_dma_get_required_mask(struct device *dev)
+static u64 sn_dma_get_required_mask(struct device *dev)
 {
 	return DMA_BIT_MASK(64);
 }
-EXPORT_SYMBOL_GPL(sn_dma_get_required_mask);
 
 char *sn_pci_get_legacy_mem(struct pci_bus *bus)
 {
@@ -473,6 +472,7 @@ static struct dma_map_ops sn_dma_ops = {
 	.sync_sg_for_device	= sn_dma_sync_sg_for_device,
 	.mapping_error		= sn_dma_mapping_error,
 	.dma_supported		= sn_dma_supported,
+	.get_required_mask	= sn_dma_get_required_mask,
 };
 
 void sn_dma_init(void)
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 070553791e977..c7b2a8d60a41e 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -26,7 +26,7 @@ config M68K
 	select MODULES_USE_ELF_RELA
 	select OLD_SIGSUSPEND3
 	select OLD_SIGACTION
-	select DMA_NONCOHERENT_OPS if HAS_DMA
+	select DMA_DIRECT_OPS if HAS_DMA
 	select HAVE_MEMBLOCK
 	select ARCH_DISCARD_MEMBLOCK
 	select NO_BOOTMEM
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index ace5c5bf18361..164a4857737a0 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -1,6 +1,7 @@
 config MICROBLAZE
 	def_bool y
 	select ARCH_NO_SWAP
+	select ARCH_HAS_DMA_COHERENT_TO_PFN if MMU
 	select ARCH_HAS_GCOV_PROFILE_ALL
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
@@ -11,8 +12,7 @@ config MICROBLAZE
 	select TIMER_OF
 	select CLONE_BACKWARDS3
 	select COMMON_CLK
-	select DMA_NONCOHERENT_OPS
-	select DMA_NONCOHERENT_MMAP
+	select DMA_DIRECT_OPS
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_CPU_DEVICES
diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index 7b650ab14fa08..f64ebb9c9a413 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -553,8 +553,6 @@ void __init *early_get_page(void);
 
 extern unsigned long ioremap_bot, ioremap_base;
 
-unsigned long consistent_virt_to_pfn(void *vaddr);
-
 void setup_memory(void);
 #endif /* __ASSEMBLY__ */
 
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index 71032cf646699..a89c2d4ed5ffc 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -42,25 +42,3 @@ void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
 {
 	__dma_sync(dev, paddr, size, dir);
 }
-
-int arch_dma_mmap(struct device *dev, struct vm_area_struct *vma,
-		void *cpu_addr, dma_addr_t handle, size_t size,
-		unsigned long attrs)
-{
-#ifdef CONFIG_MMU
-	unsigned long user_count = vma_pages(vma);
-	unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT;
-	unsigned long off = vma->vm_pgoff;
-	unsigned long pfn;
-
-	if (off >= count || user_count > (count - off))
-		return -ENXIO;
-
-	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-	pfn = consistent_virt_to_pfn(cpu_addr);
-	return remap_pfn_range(vma, vma->vm_start, pfn + off,
-			       vma->vm_end - vma->vm_start, vma->vm_page_prot);
-#else
-	return -ENXIO;
-#endif
-}
diff --git a/arch/microblaze/mm/consistent.c b/arch/microblaze/mm/consistent.c
index c9a278ac795a8..d801cc5f5b955 100644
--- a/arch/microblaze/mm/consistent.c
+++ b/arch/microblaze/mm/consistent.c
@@ -165,7 +165,8 @@ static pte_t *consistent_virt_to_pte(void *vaddr)
 	return pte_offset_kernel(pmd_offset(pgd_offset_k(addr), addr), addr);
 }
 
-unsigned long consistent_virt_to_pfn(void *vaddr)
+long arch_dma_coherent_to_pfn(struct device *dev, void *vaddr,
+		dma_addr_t dma_addr)
 {
 	pte_t *ptep = consistent_virt_to_pte(vaddr);
 
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 35511999156af..77c022e56e6ec 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1106,21 +1106,22 @@ config ARCH_SUPPORTS_UPROBES
 	bool
 
 config DMA_MAYBE_COHERENT
+	select ARCH_HAS_DMA_COHERENCE_H
 	select DMA_NONCOHERENT
 	bool
 
 config DMA_PERDEV_COHERENT
 	bool
-	select DMA_MAYBE_COHERENT
+	select DMA_NONCOHERENT
 
 config DMA_NONCOHERENT
 	bool
+	select ARCH_HAS_DMA_MMAP_PGPROT
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select NEED_DMA_MAP_STATE
-	select DMA_NONCOHERENT_MMAP
+	select ARCH_HAS_DMA_COHERENT_TO_PFN
 	select DMA_NONCOHERENT_CACHE_SYNC
-	select DMA_NONCOHERENT_OPS
 
 config SYS_HAS_EARLY_PRINTK
 	bool
diff --git a/arch/mips/include/asm/Kbuild b/arch/mips/include/asm/Kbuild
index 58351e48421e5..9a81e72119daa 100644
--- a/arch/mips/include/asm/Kbuild
+++ b/arch/mips/include/asm/Kbuild
@@ -1,6 +1,7 @@
 # MIPS headers
 generic-(CONFIG_GENERIC_CSUM) += checksum.h
 generic-y += current.h
+generic-y += device.h
 generic-y += dma-contiguous.h
 generic-y += emergency-restart.h
 generic-y += export.h
diff --git a/arch/mips/include/asm/device.h b/arch/mips/include/asm/device.h
deleted file mode 100644
index 6aa796f1081a9..0000000000000
--- a/arch/mips/include/asm/device.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Arch specific extensions to struct device
- *
- * This file is released under the GPLv2
- */
-#ifndef _ASM_MIPS_DEVICE_H
-#define _ASM_MIPS_DEVICE_H
-
-struct dev_archdata {
-#ifdef CONFIG_DMA_PERDEV_COHERENT
-	/* Non-zero if DMA is coherent with CPU caches */
-	bool dma_coherent;
-#endif
-};
-
-struct pdev_archdata {
-};
-
-#endif /* _ASM_MIPS_DEVICE_H*/
diff --git a/arch/mips/include/asm/dma-coherence.h b/arch/mips/include/asm/dma-coherence.h
index 8eda48748ed59..5eaa1fcc878a8 100644
--- a/arch/mips/include/asm/dma-coherence.h
+++ b/arch/mips/include/asm/dma-coherence.h
@@ -20,6 +20,12 @@ enum coherent_io_user_state {
 #elif defined(CONFIG_DMA_MAYBE_COHERENT)
 extern enum coherent_io_user_state coherentio;
 extern int hw_coherentio;
+
+static inline bool dev_is_dma_coherent(struct device *dev)
+{
+	return coherentio == IO_COHERENCE_ENABLED ||
+		(coherentio == IO_COHERENCE_DEFAULT && hw_coherentio);
+}
 #else
 #ifdef CONFIG_DMA_NONCOHERENT
 #define coherentio	IO_COHERENCE_DISABLED
diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h
index e81c4e97ff1a2..b4c477eb46ce9 100644
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -12,8 +12,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
 	return &jazz_dma_ops;
 #elif defined(CONFIG_SWIOTLB)
 	return &swiotlb_dma_ops;
-#elif defined(CONFIG_DMA_NONCOHERENT_OPS)
-	return &dma_noncoherent_ops;
 #else
 	return &dma_direct_ops;
 #endif
@@ -25,7 +23,7 @@ static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
 				      bool coherent)
 {
 #ifdef CONFIG_DMA_PERDEV_COHERENT
-	dev->archdata.dma_coherent = coherent;
+	dev->dma_coherent = coherent;
 #endif
 }
 
diff --git a/arch/mips/jazz/jazzdma.c b/arch/mips/jazz/jazzdma.c
index d31bc2f012088..0a0aaf39fd162 100644
--- a/arch/mips/jazz/jazzdma.c
+++ b/arch/mips/jazz/jazzdma.c
@@ -564,13 +564,13 @@ static void *jazz_dma_alloc(struct device *dev, size_t size,
 {
 	void *ret;
 
-	ret = dma_direct_alloc(dev, size, dma_handle, gfp, attrs);
+	ret = dma_direct_alloc_pages(dev, size, dma_handle, gfp, attrs);
 	if (!ret)
 		return NULL;
 
 	*dma_handle = vdma_alloc(virt_to_phys(ret), size);
 	if (*dma_handle == VDMA_ERROR) {
-		dma_direct_free(dev, size, ret, *dma_handle, attrs);
+		dma_direct_free_pages(dev, size, ret, *dma_handle, attrs);
 		return NULL;
 	}
 
@@ -587,7 +587,7 @@ static void jazz_dma_free(struct device *dev, size_t size, void *vaddr,
 	vdma_free(dma_handle);
 	if (!(attrs & DMA_ATTR_NON_CONSISTENT))
 		vaddr = (void *)CAC_ADDR((unsigned long)vaddr);
-	return dma_direct_free(dev, size, vaddr, dma_handle, attrs);
+	dma_direct_free_pages(dev, size, vaddr, dma_handle, attrs);
 }
 
 static dma_addr_t jazz_dma_map_page(struct device *dev, struct page *page,
@@ -682,7 +682,6 @@ static int jazz_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 const struct dma_map_ops jazz_dma_ops = {
 	.alloc			= jazz_dma_alloc,
 	.free			= jazz_dma_free,
-	.mmap			= arch_dma_mmap,
 	.map_page		= jazz_dma_map_page,
 	.unmap_page		= jazz_dma_unmap_page,
 	.map_sg			= jazz_dma_map_sg,
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 8aaaa42f91ed6..e64b9e8bb002e 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -1075,7 +1075,7 @@ static int __init debugfs_mips(void)
 arch_initcall(debugfs_mips);
 #endif
 
-#if defined(CONFIG_DMA_MAYBE_COHERENT) && !defined(CONFIG_DMA_PERDEV_COHERENT)
+#ifdef CONFIG_DMA_MAYBE_COHERENT
 /* User defined DMA coherency from command line. */
 enum coherent_io_user_state coherentio = IO_COHERENCE_DEFAULT;
 EXPORT_SYMBOL_GPL(coherentio);
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index a9ef057c79fe4..05bd77727fb95 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1955,22 +1955,21 @@ void r4k_cache_init(void)
 	__flush_icache_user_range	= r4k_flush_icache_user_range;
 	__local_flush_icache_user_range	= local_r4k_flush_icache_user_range;
 
-#if defined(CONFIG_DMA_NONCOHERENT) || defined(CONFIG_DMA_MAYBE_COHERENT)
-# if defined(CONFIG_DMA_PERDEV_COHERENT)
-	if (0) {
-# else
-	if ((coherentio == IO_COHERENCE_ENABLED) ||
-	    ((coherentio == IO_COHERENCE_DEFAULT) && hw_coherentio)) {
-# endif
+#ifdef CONFIG_DMA_NONCOHERENT
+#ifdef CONFIG_DMA_MAYBE_COHERENT
+	if (coherentio == IO_COHERENCE_ENABLED ||
+	    (coherentio == IO_COHERENCE_DEFAULT && hw_coherentio)) {
 		_dma_cache_wback_inv	= (void *)cache_noop;
 		_dma_cache_wback	= (void *)cache_noop;
 		_dma_cache_inv		= (void *)cache_noop;
-	} else {
+	} else
+#endif /* CONFIG_DMA_MAYBE_COHERENT */
+	{
 		_dma_cache_wback_inv	= r4k_dma_cache_wback_inv;
 		_dma_cache_wback	= r4k_dma_cache_wback_inv;
 		_dma_cache_inv		= r4k_dma_cache_inv;
 	}
-#endif
+#endif /* CONFIG_DMA_NONCOHERENT */
 
 	build_clear_page();
 	build_copy_page();
diff --git a/arch/mips/mm/dma-noncoherent.c b/arch/mips/mm/dma-noncoherent.c
index 2aca1236af36d..e6c9485cadcff 100644
--- a/arch/mips/mm/dma-noncoherent.c
+++ b/arch/mips/mm/dma-noncoherent.c
@@ -14,26 +14,6 @@
 #include <asm/dma-coherence.h>
 #include <asm/io.h>
 
-#ifdef CONFIG_DMA_PERDEV_COHERENT
-static inline int dev_is_coherent(struct device *dev)
-{
-	return dev->archdata.dma_coherent;
-}
-#else
-static inline int dev_is_coherent(struct device *dev)
-{
-	switch (coherentio) {
-	default:
-	case IO_COHERENCE_DEFAULT:
-		return hw_coherentio;
-	case IO_COHERENCE_ENABLED:
-		return 1;
-	case IO_COHERENCE_DISABLED:
-		return 0;
-	}
-}
-#endif /* CONFIG_DMA_PERDEV_COHERENT */
-
 /*
  * The affected CPUs below in 'cpu_needs_post_dma_flush()' can speculatively
  * fill random cachelines with stale data at any time, requiring an extra
@@ -49,9 +29,6 @@ static inline int dev_is_coherent(struct device *dev)
  */
 static inline bool cpu_needs_post_dma_flush(struct device *dev)
 {
-	if (dev_is_coherent(dev))
-		return false;
-
 	switch (boot_cpu_type()) {
 	case CPU_R10000:
 	case CPU_R12000:
@@ -72,11 +49,8 @@ void *arch_dma_alloc(struct device *dev, size_t size,
 {
 	void *ret;
 
-	ret = dma_direct_alloc(dev, size, dma_handle, gfp, attrs);
-	if (!ret)
-		return NULL;
-
-	if (!dev_is_coherent(dev) && !(attrs & DMA_ATTR_NON_CONSISTENT)) {
+	ret = dma_direct_alloc_pages(dev, size, dma_handle, gfp, attrs);
+	if (!ret && !(attrs & DMA_ATTR_NON_CONSISTENT)) {
 		dma_cache_wback_inv((unsigned long) ret, size);
 		ret = (void *)UNCAC_ADDR(ret);
 	}
@@ -87,43 +61,24 @@ void *arch_dma_alloc(struct device *dev, size_t size,
 void arch_dma_free(struct device *dev, size_t size, void *cpu_addr,
 		dma_addr_t dma_addr, unsigned long attrs)
 {
-	if (!(attrs & DMA_ATTR_NON_CONSISTENT) && !dev_is_coherent(dev))
+	if (!(attrs & DMA_ATTR_NON_CONSISTENT))
 		cpu_addr = (void *)CAC_ADDR((unsigned long)cpu_addr);
-	dma_direct_free(dev, size, cpu_addr, dma_addr, attrs);
+	dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);
 }
 
-int arch_dma_mmap(struct device *dev, struct vm_area_struct *vma,
-		void *cpu_addr, dma_addr_t dma_addr, size_t size,
-		unsigned long attrs)
+long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr,
+		dma_addr_t dma_addr)
 {
-	unsigned long user_count = vma_pages(vma);
-	unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT;
-	unsigned long addr = (unsigned long)cpu_addr;
-	unsigned long off = vma->vm_pgoff;
-	unsigned long pfn;
-	int ret = -ENXIO;
-
-	if (!dev_is_coherent(dev))
-		addr = CAC_ADDR(addr);
-
-	pfn = page_to_pfn(virt_to_page((void *)addr));
+	unsigned long addr = CAC_ADDR((unsigned long)cpu_addr);
+	return page_to_pfn(virt_to_page((void *)addr));
+}
 
+pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
+		unsigned long attrs)
+{
 	if (attrs & DMA_ATTR_WRITE_COMBINE)
-		vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
-	else
-		vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
-	if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))
-		return ret;
-
-	if (off < count && user_count <= (count - off)) {
-		ret = remap_pfn_range(vma, vma->vm_start,
-				      pfn + off,
-				      user_count << PAGE_SHIFT,
-				      vma->vm_page_prot);
-	}
-
-	return ret;
+		return pgprot_writecombine(prot);
+	return pgprot_noncached(prot);
 }
 
 static inline void dma_sync_virt(void *addr, size_t size,
@@ -187,8 +142,7 @@ static inline void dma_sync_phys(phys_addr_t paddr, size_t size,
 void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
 		size_t size, enum dma_data_direction dir)
 {
-	if (!dev_is_coherent(dev))
-		dma_sync_phys(paddr, size, dir);
+	dma_sync_phys(paddr, size, dir);
 }
 
 void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
@@ -203,6 +157,5 @@ void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 {
 	BUG_ON(direction == DMA_NONE);
 
-	if (!dev_is_coherent(dev))
-		dma_sync_virt(vaddr, size, direction);
+	dma_sync_virt(vaddr, size, direction);
 }
diff --git a/arch/nds32/Kconfig b/arch/nds32/Kconfig
index 7068f341133d7..56992330026a6 100644
--- a/arch/nds32/Kconfig
+++ b/arch/nds32/Kconfig
@@ -11,7 +11,7 @@ config NDS32
 	select CLKSRC_MMIO
 	select CLONE_BACKWARDS
 	select COMMON_CLK
-	select DMA_NONCOHERENT_OPS
+	select DMA_DIRECT_OPS
 	select GENERIC_ATOMIC64
 	select GENERIC_CPU_DEVICES
 	select GENERIC_CLOCKEVENTS
diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig
index f4ad1138e6b90..03965692fbfe2 100644
--- a/arch/nios2/Kconfig
+++ b/arch/nios2/Kconfig
@@ -4,7 +4,7 @@ config NIOS2
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 	select ARCH_NO_SWAP
-	select DMA_NONCOHERENT_OPS
+	select DMA_DIRECT_OPS
 	select TIMER_OF
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index e0081e7348271..a655ae280637b 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -7,7 +7,7 @@
 config OPENRISC
 	def_bool y
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
-	select DMA_NONCOHERENT_OPS
+	select DMA_DIRECT_OPS
 	select OF
 	select OF_EARLY_FLATTREE
 	select IRQ_DOMAIN
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 8e6d83f79e72b..f1cd12afd943c 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -186,7 +186,7 @@ config PA11
 	depends on PA7000 || PA7100LC || PA7200 || PA7300LC
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
-	select DMA_NONCOHERENT_OPS
+	select DMA_DIRECT_OPS
 	select DMA_NONCOHERENT_CACHE_SYNC
 
 config PREFETCH
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 4e87c35c22b72..755e89ec828a3 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -102,7 +102,7 @@ void __init dma_ops_init(void)
 	case pcxl: /* falls through */
 	case pcxs:
 	case pcxt:
-		hppa_dma_ops = &dma_noncoherent_ops;
+		hppa_dma_ops = &dma_direct_ops;
 		break;
 	default:
 		break;
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 1fb7b6d72bafc..475d786a65b07 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -7,6 +7,7 @@ config SUPERH
 	select ARCH_NO_COHERENT_DMA_MMAP if !MMU
 	select HAVE_PATA_PLATFORM
 	select CLKDEV_LOOKUP
+	select DMA_DIRECT_OPS
 	select HAVE_IDE if HAS_IOPORT_MAP
 	select HAVE_MEMBLOCK
 	select HAVE_MEMBLOCK_NODE_MAP
@@ -158,13 +159,11 @@ config SWAP_IO_SPACE
 	bool
 
 config DMA_COHERENT
-	select DMA_DIRECT_OPS
 	bool
 
 config DMA_NONCOHERENT
 	def_bool !DMA_COHERENT
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
-	select DMA_NONCOHERENT_OPS
 
 config PGTABLE_LEVELS
 	default 3 if X2TLB
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index e6f2a38d2e61e..7e2aa59fcc296 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -51,7 +51,7 @@ config SPARC
 config SPARC32
 	def_bool !64BIT
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
-	select DMA_NONCOHERENT_OPS
+	select DMA_DIRECT_OPS
 	select GENERIC_ATOMIC64
 	select CLZ_TAB
 	select HAVE_UID16
diff --git a/arch/sparc/include/asm/dma-mapping.h b/arch/sparc/include/asm/dma-mapping.h
index e17566376934f..b0bb2fcaf1c90 100644
--- a/arch/sparc/include/asm/dma-mapping.h
+++ b/arch/sparc/include/asm/dma-mapping.h
@@ -14,11 +14,11 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
 {
 #ifdef CONFIG_SPARC_LEON
 	if (sparc_cpu_model == sparc_leon)
-		return &dma_noncoherent_ops;
+		return &dma_direct_ops;
 #endif
 #if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
 	if (bus == &pci_bus_type)
-		return &dma_noncoherent_ops;
+		return &dma_direct_ops;
 #endif
 	return dma_ops;
 }
diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 60eae744d8fd0..3a3b40f795589 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -4,6 +4,7 @@ config UNICORE32
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_MIGHT_HAVE_PC_SERIO
+	select DMA_DIRECT_OPS
 	select HAVE_MEMBLOCK
 	select HAVE_GENERIC_DMA_COHERENT
 	select HAVE_KERNEL_GZIP
@@ -20,7 +21,6 @@ config UNICORE32
 	select GENERIC_IOMAP
 	select MODULES_USE_ELF_REL
 	select NEED_DMA_MAP_STATE
-	select SWIOTLB
 	help
 	  UniCore-32 is 32-bit Instruction Set Architecture,
 	  including a series of low-power-consumption RISC chip
diff --git a/arch/unicore32/include/asm/Kbuild b/arch/unicore32/include/asm/Kbuild
index bfc7abe779057..1372553dc0a9a 100644
--- a/arch/unicore32/include/asm/Kbuild
+++ b/arch/unicore32/include/asm/Kbuild
@@ -4,6 +4,7 @@ generic-y += compat.h
 generic-y += current.h
 generic-y += device.h
 generic-y += div64.h
+generic-y += dma-mapping.h
 generic-y += emergency-restart.h
 generic-y += exec.h
 generic-y += extable.h
diff --git a/arch/unicore32/include/asm/dma-mapping.h b/arch/unicore32/include/asm/dma-mapping.h
deleted file mode 100644
index 790bc2ef4af27..0000000000000
--- a/arch/unicore32/include/asm/dma-mapping.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * linux/arch/unicore32/include/asm/dma-mapping.h
- *
- * Code specific to PKUnity SoC and UniCore ISA
- *
- * Copyright (C) 2001-2010 GUAN Xue-tao
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef __UNICORE_DMA_MAPPING_H__
-#define __UNICORE_DMA_MAPPING_H__
-
-#include <linux/swiotlb.h>
-
-static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
-{
-	return &swiotlb_dma_ops;
-}
-
-#endif
diff --git a/arch/unicore32/mm/init.c b/arch/unicore32/mm/init.c
index f4950fbfe5749..5f72a8d1d9534 100644
--- a/arch/unicore32/mm/init.c
+++ b/arch/unicore32/mm/init.c
@@ -234,9 +234,6 @@ void __init bootmem_init(void)
 
 	uc32_bootmem_init(min, max_low);
 
-#ifdef CONFIG_SWIOTLB
-	swiotlb_init(1);
-#endif
 	/*
 	 * Sparsemem tries to allocate bootmem in memory_present(),
 	 * so must be done after the fixed reservations
diff --git a/arch/x86/kernel/amd_gart_64.c b/arch/x86/kernel/amd_gart_64.c
index f299d8a479bbb..3f9d1b4019bbf 100644
--- a/arch/x86/kernel/amd_gart_64.c
+++ b/arch/x86/kernel/amd_gart_64.c
@@ -482,7 +482,7 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
 {
 	void *vaddr;
 
-	vaddr = dma_direct_alloc(dev, size, dma_addr, flag, attrs);
+	vaddr = dma_direct_alloc_pages(dev, size, dma_addr, flag, attrs);
 	if (!vaddr ||
 	    !force_iommu || dev->coherent_dma_mask <= DMA_BIT_MASK(24))
 		return vaddr;
@@ -494,7 +494,7 @@ gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
 		goto out_free;
 	return vaddr;
 out_free:
-	dma_direct_free(dev, size, vaddr, *dma_addr, attrs);
+	dma_direct_free_pages(dev, size, vaddr, *dma_addr, attrs);
 	return NULL;
 }
 
@@ -504,7 +504,7 @@ gart_free_coherent(struct device *dev, size_t size, void *vaddr,
 		   dma_addr_t dma_addr, unsigned long attrs)
 {
 	gart_unmap_page(dev, dma_addr, size, DMA_BIDIRECTIONAL, 0);
-	dma_direct_free(dev, size, vaddr, dma_addr, attrs);
+	dma_direct_free_pages(dev, size, vaddr, dma_addr, attrs);
 }
 
 static int gart_mapping_error(struct device *dev, dma_addr_t dma_addr)
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index b9ad83a0ee5db..ea5d8d03e53b8 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -13,7 +13,7 @@ config XTENSA
 	select BUILDTIME_EXTABLE_SORT
 	select CLONE_BACKWARDS
 	select COMMON_CLK
-	select DMA_NONCOHERENT_OPS
+	select DMA_DIRECT_OPS
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_IRQ_SHOW