From 0a0f0d8be76dcd4390ff538e7060fda34db79717 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 22 Sep 2020 15:31:03 +0200
Subject: dma-mapping: split <linux/dma-mapping.h>

Split out all the bits that are purely for dma_map_ops implementations
and related code into a new <linux/dma-map-ops.h> header so that they
don't get pulled into all the drivers.  That also means the architecture
specific <asm/dma-mapping.h> is not pulled in by <linux/dma-mapping.h>
any more, which leads to a missing includes that were pulled in by the
x86 or arm versions in a few not overly portable drivers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/pci/xen-pcifront.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'drivers/pci')

diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index c0e85be598c1..c6fe0cfec0f6 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -22,6 +22,7 @@
 #include <linux/bitops.h>
 #include <linux/time.h>
 #include <linux/ktime.h>
+#include <linux/swiotlb.h>
 #include <xen/platform_pci.h>
 
 #include <asm/xen/swiotlb-xen.h>
-- 
cgit v1.2.3-59-g8ed1b


From a1fd09e8e6ae35228ecc7c1e4bfff1fd725f78a0 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 11 Sep 2020 10:12:44 +0200
Subject: dma-mapping: move dma-debug.h to kernel/dma/

Most of dma-debug.h is not required by anything outside of kernel/dma.
Move the four declarations needed by dma-mappin.h or dma-ops providers
into dma-mapping.h and dma-map-ops.h, and move the remainder of the
file to kernel/dma/debug.h.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/arm/include/asm/dma-iommu.h   |   1 -
 arch/arm/include/asm/dma-mapping.h |   1 -
 arch/microblaze/kernel/dma.c       |   1 -
 arch/sh/drivers/pci/pci.c          |   1 -
 arch/x86/include/asm/dma-mapping.h |   1 -
 arch/x86/kernel/pci-dma.c          |   1 -
 drivers/pci/pci-driver.c           |   1 +
 include/linux/dma-debug.h          | 160 -------------------------------------
 include/linux/dma-map-ops.h        |  12 +++
 include/linux/dma-mapping.h        |  16 +++-
 kernel/dma/debug.c                 |   5 +-
 kernel/dma/debug.h                 | 122 ++++++++++++++++++++++++++++
 kernel/dma/mapping.c               |   1 +
 mm/memory.c                        |   1 -
 14 files changed, 153 insertions(+), 171 deletions(-)
 delete mode 100644 include/linux/dma-debug.h
 create mode 100644 kernel/dma/debug.h

(limited to 'drivers/pci')

diff --git a/arch/arm/include/asm/dma-iommu.h b/arch/arm/include/asm/dma-iommu.h
index 86405cc81385..fe9ef6f79e9c 100644
--- a/arch/arm/include/asm/dma-iommu.h
+++ b/arch/arm/include/asm/dma-iommu.h
@@ -6,7 +6,6 @@
 
 #include <linux/mm_types.h>
 #include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
 #include <linux/kref.h>
 
 struct dma_iommu_mapping {
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 0a1a536368c3..77082246a5e1 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -6,7 +6,6 @@
 
 #include <linux/mm_types.h>
 #include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
 
 #include <xen/xen.h>
 #include <asm/xen/hypervisor.h>
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index d7bebd04247b..a564863db06e 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -10,7 +10,6 @@
 #include <linux/device.h>
 #include <linux/dma-noncoherent.h>
 #include <linux/gfp.h>
-#include <linux/dma-debug.h>
 #include <linux/export.h>
 #include <linux/bug.h>
 #include <asm/cacheflush.h>
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index 6ab0b7377f66..a3903304f33f 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -13,7 +13,6 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/types.h>
-#include <linux/dma-debug.h>
 #include <linux/io.h>
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index e0c380b3ec14..bb1654fe0ce7 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -8,7 +8,6 @@
  */
 
 #include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
 #include <asm/io.h>
 #include <asm/swiotlb.h>
 
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 4892dd043d41..de234e7a8962 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -1,7 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/dma-map-ops.h>
 #include <linux/dma-direct.h>
-#include <linux/dma-debug.h>
 #include <linux/iommu.h>
 #include <linux/dmar.h>
 #include <linux/export.h>
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 449466f71040..d1b7169c0684 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -19,6 +19,7 @@
 #include <linux/kexec.h>
 #include <linux/of_device.h>
 #include <linux/acpi.h>
+#include <linux/dma-map-ops.h>
 #include "pci.h"
 #include "pcie/portdrv.h"
 
diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h
deleted file mode 100644
index 7b3b04ba60f3..000000000000
--- a/include/linux/dma-debug.h
+++ /dev/null
@@ -1,160 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2008 Advanced Micro Devices, Inc.
- *
- * Author: Joerg Roedel <joerg.roedel@amd.com>
- */
-
-#ifndef __DMA_DEBUG_H
-#define __DMA_DEBUG_H
-
-#include <linux/types.h>
-
-struct device;
-struct scatterlist;
-struct bus_type;
-
-#ifdef CONFIG_DMA_API_DEBUG
-
-extern void dma_debug_add_bus(struct bus_type *bus);
-
-extern void debug_dma_map_single(struct device *dev, const void *addr,
-				 unsigned long len);
-
-extern void debug_dma_map_page(struct device *dev, struct page *page,
-			       size_t offset, size_t size,
-			       int direction, dma_addr_t dma_addr);
-
-extern void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
-
-extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
-				 size_t size, int direction);
-
-extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
-			     int nents, int mapped_ents, int direction);
-
-extern void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
-			       int nelems, int dir);
-
-extern void debug_dma_alloc_coherent(struct device *dev, size_t size,
-				     dma_addr_t dma_addr, void *virt);
-
-extern void debug_dma_free_coherent(struct device *dev, size_t size,
-				    void *virt, dma_addr_t addr);
-
-extern void debug_dma_map_resource(struct device *dev, phys_addr_t addr,
-				   size_t size, int direction,
-				   dma_addr_t dma_addr);
-
-extern void debug_dma_unmap_resource(struct device *dev, dma_addr_t dma_addr,
-				     size_t size, int direction);
-
-extern void debug_dma_sync_single_for_cpu(struct device *dev,
-					  dma_addr_t dma_handle, size_t size,
-					  int direction);
-
-extern void debug_dma_sync_single_for_device(struct device *dev,
-					     dma_addr_t dma_handle,
-					     size_t size, int direction);
-
-extern void debug_dma_sync_sg_for_cpu(struct device *dev,
-				      struct scatterlist *sg,
-				      int nelems, int direction);
-
-extern void debug_dma_sync_sg_for_device(struct device *dev,
-					 struct scatterlist *sg,
-					 int nelems, int direction);
-
-extern void debug_dma_dump_mappings(struct device *dev);
-
-#else /* CONFIG_DMA_API_DEBUG */
-
-static inline void dma_debug_add_bus(struct bus_type *bus)
-{
-}
-
-static inline void debug_dma_map_single(struct device *dev, const void *addr,
-					unsigned long len)
-{
-}
-
-static inline void debug_dma_map_page(struct device *dev, struct page *page,
-				      size_t offset, size_t size,
-				      int direction, dma_addr_t dma_addr)
-{
-}
-
-static inline void debug_dma_mapping_error(struct device *dev,
-					  dma_addr_t dma_addr)
-{
-}
-
-static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
-					size_t size, int direction)
-{
-}
-
-static inline void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
-				    int nents, int mapped_ents, int direction)
-{
-}
-
-static inline void debug_dma_unmap_sg(struct device *dev,
-				      struct scatterlist *sglist,
-				      int nelems, int dir)
-{
-}
-
-static inline void debug_dma_alloc_coherent(struct device *dev, size_t size,
-					    dma_addr_t dma_addr, void *virt)
-{
-}
-
-static inline void debug_dma_free_coherent(struct device *dev, size_t size,
-					   void *virt, dma_addr_t addr)
-{
-}
-
-static inline void debug_dma_map_resource(struct device *dev, phys_addr_t addr,
-					  size_t size, int direction,
-					  dma_addr_t dma_addr)
-{
-}
-
-static inline void debug_dma_unmap_resource(struct device *dev,
-					    dma_addr_t dma_addr, size_t size,
-					    int direction)
-{
-}
-
-static inline void debug_dma_sync_single_for_cpu(struct device *dev,
-						 dma_addr_t dma_handle,
-						 size_t size, int direction)
-{
-}
-
-static inline void debug_dma_sync_single_for_device(struct device *dev,
-						    dma_addr_t dma_handle,
-						    size_t size, int direction)
-{
-}
-
-static inline void debug_dma_sync_sg_for_cpu(struct device *dev,
-					     struct scatterlist *sg,
-					     int nelems, int direction)
-{
-}
-
-static inline void debug_dma_sync_sg_for_device(struct device *dev,
-						struct scatterlist *sg,
-						int nelems, int direction)
-{
-}
-
-static inline void debug_dma_dump_mappings(struct device *dev)
-{
-}
-
-#endif /* CONFIG_DMA_API_DEBUG */
-
-#endif /* __DMA_DEBUG_H */
diff --git a/include/linux/dma-map-ops.h b/include/linux/dma-map-ops.h
index 7912f5d00ed9..9891def42da7 100644
--- a/include/linux/dma-map-ops.h
+++ b/include/linux/dma-map-ops.h
@@ -220,6 +220,18 @@ static inline void arch_teardown_dma_ops(struct device *dev)
 }
 #endif /* CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS */
 
+#ifdef CONFIG_DMA_API_DEBUG
+void dma_debug_add_bus(struct bus_type *bus);
+void debug_dma_dump_mappings(struct device *dev);
+#else
+static inline void dma_debug_add_bus(struct bus_type *bus)
+{
+}
+static inline void debug_dma_dump_mappings(struct device *dev)
+{
+}
+#endif /* CONFIG_DMA_API_DEBUG */
+
 extern const struct dma_map_ops dma_dummy_ops;
 
 #endif /* _LINUX_DMA_MAP_OPS_H */
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 9591cd482d7c..3f029afdc9dc 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -6,7 +6,6 @@
 #include <linux/string.h>
 #include <linux/device.h>
 #include <linux/err.h>
-#include <linux/dma-debug.h>
 #include <linux/dma-direction.h>
 #include <linux/scatterlist.h>
 #include <linux/bug.h>
@@ -76,6 +75,21 @@
 
 #define DMA_BIT_MASK(n)	(((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
 
+#ifdef CONFIG_DMA_API_DEBUG
+void debug_dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
+void debug_dma_map_single(struct device *dev, const void *addr,
+		unsigned long len);
+#else
+static inline void debug_dma_mapping_error(struct device *dev,
+		dma_addr_t dma_addr)
+{
+}
+static inline void debug_dma_map_single(struct device *dev, const void *addr,
+		unsigned long len)
+{
+}
+#endif /* CONFIG_DMA_API_DEBUG */
+
 #ifdef CONFIG_HAS_DMA
 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 {
diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c
index 4211800d9f3e..14de1271463f 100644
--- a/kernel/dma/debug.c
+++ b/kernel/dma/debug.c
@@ -9,10 +9,9 @@
 
 #include <linux/sched/task_stack.h>
 #include <linux/scatterlist.h>
-#include <linux/dma-mapping.h>
+#include <linux/dma-map-ops.h>
 #include <linux/sched/task.h>
 #include <linux/stacktrace.h>
-#include <linux/dma-debug.h>
 #include <linux/spinlock.h>
 #include <linux/vmalloc.h>
 #include <linux/debugfs.h>
@@ -24,8 +23,8 @@
 #include <linux/ctype.h>
 #include <linux/list.h>
 #include <linux/slab.h>
-
 #include <asm/sections.h>
+#include "debug.h"
 
 #define HASH_SIZE       16384ULL
 #define HASH_FN_SHIFT   13
diff --git a/kernel/dma/debug.h b/kernel/dma/debug.h
new file mode 100644
index 000000000000..83643b3010b2
--- /dev/null
+++ b/kernel/dma/debug.h
@@ -0,0 +1,122 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2008 Advanced Micro Devices, Inc.
+ *
+ * Author: Joerg Roedel <joerg.roedel@amd.com>
+ */
+
+#ifndef _KERNEL_DMA_DEBUG_H
+#define _KERNEL_DMA_DEBUG_H
+
+#ifdef CONFIG_DMA_API_DEBUG
+extern void debug_dma_map_page(struct device *dev, struct page *page,
+			       size_t offset, size_t size,
+			       int direction, dma_addr_t dma_addr);
+
+extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
+				 size_t size, int direction);
+
+extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
+			     int nents, int mapped_ents, int direction);
+
+extern void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
+			       int nelems, int dir);
+
+extern void debug_dma_alloc_coherent(struct device *dev, size_t size,
+				     dma_addr_t dma_addr, void *virt);
+
+extern void debug_dma_free_coherent(struct device *dev, size_t size,
+				    void *virt, dma_addr_t addr);
+
+extern void debug_dma_map_resource(struct device *dev, phys_addr_t addr,
+				   size_t size, int direction,
+				   dma_addr_t dma_addr);
+
+extern void debug_dma_unmap_resource(struct device *dev, dma_addr_t dma_addr,
+				     size_t size, int direction);
+
+extern void debug_dma_sync_single_for_cpu(struct device *dev,
+					  dma_addr_t dma_handle, size_t size,
+					  int direction);
+
+extern void debug_dma_sync_single_for_device(struct device *dev,
+					     dma_addr_t dma_handle,
+					     size_t size, int direction);
+
+extern void debug_dma_sync_sg_for_cpu(struct device *dev,
+				      struct scatterlist *sg,
+				      int nelems, int direction);
+
+extern void debug_dma_sync_sg_for_device(struct device *dev,
+					 struct scatterlist *sg,
+					 int nelems, int direction);
+#else /* CONFIG_DMA_API_DEBUG */
+static inline void debug_dma_map_page(struct device *dev, struct page *page,
+				      size_t offset, size_t size,
+				      int direction, dma_addr_t dma_addr)
+{
+}
+
+static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
+					size_t size, int direction)
+{
+}
+
+static inline void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
+				    int nents, int mapped_ents, int direction)
+{
+}
+
+static inline void debug_dma_unmap_sg(struct device *dev,
+				      struct scatterlist *sglist,
+				      int nelems, int dir)
+{
+}
+
+static inline void debug_dma_alloc_coherent(struct device *dev, size_t size,
+					    dma_addr_t dma_addr, void *virt)
+{
+}
+
+static inline void debug_dma_free_coherent(struct device *dev, size_t size,
+					   void *virt, dma_addr_t addr)
+{
+}
+
+static inline void debug_dma_map_resource(struct device *dev, phys_addr_t addr,
+					  size_t size, int direction,
+					  dma_addr_t dma_addr)
+{
+}
+
+static inline void debug_dma_unmap_resource(struct device *dev,
+					    dma_addr_t dma_addr, size_t size,
+					    int direction)
+{
+}
+
+static inline void debug_dma_sync_single_for_cpu(struct device *dev,
+						 dma_addr_t dma_handle,
+						 size_t size, int direction)
+{
+}
+
+static inline void debug_dma_sync_single_for_device(struct device *dev,
+						    dma_addr_t dma_handle,
+						    size_t size, int direction)
+{
+}
+
+static inline void debug_dma_sync_sg_for_cpu(struct device *dev,
+					     struct scatterlist *sg,
+					     int nelems, int direction)
+{
+}
+
+static inline void debug_dma_sync_sg_for_device(struct device *dev,
+						struct scatterlist *sg,
+						int nelems, int direction)
+{
+}
+#endif /* CONFIG_DMA_API_DEBUG */
+#endif /* _KERNEL_DMA_DEBUG_H */
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index 2e13e6d3903f..335ba183e095 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -14,6 +14,7 @@
 #include <linux/of_device.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
+#include "debug.h"
 
 /*
  * Managed DMA API
diff --git a/mm/memory.c b/mm/memory.c
index f3eb55975902..7e4e8b81a738 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -65,7 +65,6 @@
 #include <linux/gfp.h>
 #include <linux/migrate.h>
 #include <linux/string.h>
-#include <linux/dma-debug.h>
 #include <linux/debugfs.h>
 #include <linux/userfaultfd_k.h>
 #include <linux/dax.h>
-- 
cgit v1.2.3-59-g8ed1b