Merge tag 'dma-mapping-4.14' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping updates from Christoph Hellwig:

 - removal of the old dma_alloc_noncoherent interface

 - remove unused flags to dma_declare_coherent_memory

 - restrict OF DMA configuration to specific physical busses

 - use the iommu mailing list for dma-mapping questions and patches

* tag 'dma-mapping-4.14' of git://git.infradead.org/users/hch/dma-mapping:
  dma-coherent: fix dma_declare_coherent_memory() logic error
  ARM: imx: mx31moboard: Remove unused 'dma' variable
  dma-coherent: remove an unused variable
  MAINTAINERS: use the iommu list for the dma-mapping subsystem
  dma-coherent: remove the DMA_MEMORY_MAP and DMA_MEMORY_IO flags
  dma-coherent: remove the DMA_MEMORY_INCLUDES_CHILDREN flag
  of: restrict DMA configuration
  dma-mapping: remove dma_alloc_noncoherent and dma_free_noncoherent
  i825xx: switch to switch to dma_alloc_attrs
  au1000_eth: switch to dma_alloc_attrs
  sgiseeq: switch to dma_alloc_attrs
  dma-mapping: reduce dma_mapping_error inline bloat

6 files changed, 28 insertions, 39 deletions

diff --git a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
index dd75a4756761..5169dfba9718 100644
--- a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
+++ b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
@@ -245,7 +245,6 @@ static phys_addr_t mx2_camera_base __initdata;
 static void __init visstrim_analog_camera_init(void)
 {
 	struct platform_device *pdev;
-	int dma;
 
 	gpio_set_value(TVP5150_PWDN, 1);
 	ndelay(1);
@@ -258,12 +257,9 @@ static void __init visstrim_analog_camera_init(void)
 	if (IS_ERR(pdev))
 		return;
 
-	dma = dma_declare_coherent_memory(&pdev->dev,
-				mx2_camera_base, mx2_camera_base,
-				MX2_CAMERA_BUF_SIZE,
-				DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE);
-	if (!(dma & DMA_MEMORY_MAP))
-		return;
+	dma_declare_coherent_memory(&pdev->dev, mx2_camera_base,
+				    mx2_camera_base, MX2_CAMERA_BUF_SIZE,
+				    DMA_MEMORY_EXCLUSIVE);
 }
 
 static void __init visstrim_reserve(void)
@@ -444,16 +440,13 @@ static const struct imx_ssi_platform_data visstrim_m10_ssi_pdata __initconst = {
 static void __init visstrim_coda_init(void)
 {
 	struct platform_device *pdev;
-	int dma;
 
 	pdev = imx27_add_coda();
-	dma = dma_declare_coherent_memory(&pdev->dev,
-					  mx2_camera_base + MX2_CAMERA_BUF_SIZE,
-					  mx2_camera_base + MX2_CAMERA_BUF_SIZE,
-					  MX2_CAMERA_BUF_SIZE,
-					  DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE);
-	if (!(dma & DMA_MEMORY_MAP))
-		return;
+	dma_declare_coherent_memory(&pdev->dev,
+				    mx2_camera_base + MX2_CAMERA_BUF_SIZE,
+				    mx2_camera_base + MX2_CAMERA_BUF_SIZE,
+				    MX2_CAMERA_BUF_SIZE,
+				    DMA_MEMORY_EXCLUSIVE);
 }
 
 /* DMA deinterlace */
@@ -466,24 +459,21 @@ static void __init visstrim_deinterlace_init(void)
 {
 	int ret = -ENOMEM;
 	struct platform_device *pdev = &visstrim_deinterlace;
-	int dma;
 
 	ret = platform_device_register(pdev);
 
-	dma = dma_declare_coherent_memory(&pdev->dev,
-					  mx2_camera_base + 2 * MX2_CAMERA_BUF_SIZE,
-					  mx2_camera_base + 2 * MX2_CAMERA_BUF_SIZE,
-					  MX2_CAMERA_BUF_SIZE,
-					  DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE);
-	if (!(dma & DMA_MEMORY_MAP))
-		return;
+	dma_declare_coherent_memory(&pdev->dev,
+				    mx2_camera_base + 2 * MX2_CAMERA_BUF_SIZE,
+				    mx2_camera_base + 2 * MX2_CAMERA_BUF_SIZE,
+				    MX2_CAMERA_BUF_SIZE,
+				    DMA_MEMORY_EXCLUSIVE);
 }
 
 /* Emma-PrP for format conversion */
 static void __init visstrim_emmaprp_init(void)
 {
 	struct platform_device *pdev;
-	int dma;
+	int ret;
 
 	pdev = imx27_add_mx2_emmaprp();
 	if (IS_ERR(pdev))
@@ -493,11 +483,11 @@ static void __init visstrim_emmaprp_init(void)
 	 * Use the same memory area as the analog camera since both
 	 * devices are, by nature, exclusive.
 	 */
-	dma = dma_declare_coherent_memory(&pdev->dev,
+	ret = dma_declare_coherent_memory(&pdev->dev,
 				mx2_camera_base, mx2_camera_base,
 				MX2_CAMERA_BUF_SIZE,
-				DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE);
-	if (!(dma & DMA_MEMORY_MAP))
+				DMA_MEMORY_EXCLUSIVE);
+	if (ret)
 		pr_err("Failed to declare memory for emmaprp\n");
 }
 
diff --git a/arch/arm/mach-imx/mach-mx31moboard.c b/arch/arm/mach-imx/mach-mx31moboard.c
index bde9a9af6714..7716f83aecdd 100644
--- a/arch/arm/mach-imx/mach-mx31moboard.c
+++ b/arch/arm/mach-imx/mach-mx31moboard.c
@@ -475,7 +475,7 @@ static phys_addr_t mx3_camera_base __initdata;
 
 static int __init mx31moboard_init_cam(void)
 {
-	int dma, ret = -ENOMEM;
+	int ret;
 	struct platform_device *pdev;
 
 	imx31_add_ipu_core();
@@ -484,11 +484,11 @@ static int __init mx31moboard_init_cam(void)
 	if (IS_ERR(pdev))
 		return PTR_ERR(pdev);
 
-	dma = dma_declare_coherent_memory(&pdev->dev,
-					mx3_camera_base, mx3_camera_base,
-					MX3_CAMERA_BUF_SIZE,
-					DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE);
-	if (!(dma & DMA_MEMORY_MAP))
+	ret = dma_declare_coherent_memory(&pdev->dev,
+					  mx3_camera_base, mx3_camera_base,
+					  MX3_CAMERA_BUF_SIZE,
+					  DMA_MEMORY_EXCLUSIVE);
+	if (ret)
 		goto err;
 
 	ret = platform_device_add(pdev);
diff --git a/arch/metag/include/asm/dma-mapping.h b/arch/metag/include/asm/dma-mapping.h
index fad3dc3cb210..ea573be2b6d0 100644
--- a/arch/metag/include/asm/dma-mapping.h
+++ b/arch/metag/include/asm/dma-mapping.h
@@ -9,7 +9,7 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
 }
 
 /*
- * dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to
+ * dma_alloc_attrs() always returns non-cacheable memory, so there's no need to
  * do any flushing here.
  */
 static inline void
diff --git a/arch/nios2/include/asm/dma-mapping.h b/arch/nios2/include/asm/dma-mapping.h
index 7b3c6f280293..f8dc62222741 100644
--- a/arch/nios2/include/asm/dma-mapping.h
+++ b/arch/nios2/include/asm/dma-mapping.h
@@ -18,7 +18,7 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
 }
 
 /*
- * dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to
+ * dma_alloc_attrs() always returns non-cacheable memory, so there's no need to
  * do any flushing here.
  */
 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
diff --git a/arch/sh/drivers/pci/fixups-dreamcast.c b/arch/sh/drivers/pci/fixups-dreamcast.c
index 9d597f7ab8dd..48aaefd8f5d6 100644
--- a/arch/sh/drivers/pci/fixups-dreamcast.c
+++ b/arch/sh/drivers/pci/fixups-dreamcast.c
@@ -63,11 +63,10 @@ static void gapspci_fixup_resources(struct pci_dev *dev)
 		res.end = GAPSPCI_DMA_BASE + GAPSPCI_DMA_SIZE - 1;
 		res.flags = IORESOURCE_MEM;
 		pcibios_resource_to_bus(dev->bus, &region, &res);
-		BUG_ON(!dma_declare_coherent_memory(&dev->dev,
+		BUG_ON(dma_declare_coherent_memory(&dev->dev,
 						res.start,
 						region.start,
 						resource_size(&res),
-						DMA_MEMORY_MAP |
 						DMA_MEMORY_EXCLUSIVE));
 		break;
 	default:
diff --git a/arch/tile/include/asm/dma-mapping.h b/arch/tile/include/asm/dma-mapping.h
index bbc71a29b2c6..7061dc8af43a 100644
--- a/arch/tile/include/asm/dma-mapping.h
+++ b/arch/tile/include/asm/dma-mapping.h
@@ -68,8 +68,8 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
 int dma_set_mask(struct device *dev, u64 mask);
 
 /*
- * dma_alloc_noncoherent() is #defined to return coherent memory,
- * so there's no need to do any flushing here.
+ * dma_alloc_attrs() always returns non-cacheable memory, so there's no need to
+ * do any flushing here.
  */
 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 				  enum dma_data_direction direction)