xen/arm: consolidate page-coherent.h

Shared the duplicate arm/arm64 code in include/xen/arm/page-coherent.h.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>

diff --git a/arch/arm/include/asm/xen/page-coherent.h b/arch/arm/include/asm/xen/page-coherent.h
index 602ac02f154c9013a6ff13fefd14fa785d8bfe3a..27e984977402b27ef5904ba827a899115d366c6d 100644 (file)
--- a/arch/arm/include/asm/xen/page-coherent.h
+++ b/arch/arm/include/asm/xen/page-coherent.h
@@ -1,77 +1,2 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_ARM_XEN_PAGE_COHERENT_H
-#define _ASM_ARM_XEN_PAGE_COHERENT_H
-
-#include <linux/dma-mapping.h>
-#include <asm/page.h>
 #include <xen/arm/page-coherent.h>
-
-static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
-               dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs)
-{
-       return dma_direct_alloc(hwdev, size, dma_handle, flags, attrs);
-}
-
-static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
-               void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs)
-{
-       dma_direct_free(hwdev, size, cpu_addr, dma_handle, attrs);
-}
-
-static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
-               dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
-       unsigned long pfn = PFN_DOWN(handle);
-
-       if (pfn_valid(pfn))
-               dma_direct_sync_single_for_cpu(hwdev, handle, size, dir);
-       else
-               __xen_dma_sync_single_for_cpu(hwdev, handle, size, dir);
-}
-
-static inline void xen_dma_sync_single_for_device(struct device *hwdev,
-               dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
-       unsigned long pfn = PFN_DOWN(handle);
-       if (pfn_valid(pfn))
-               dma_direct_sync_single_for_device(hwdev, handle, size, dir);
-       else
-               __xen_dma_sync_single_for_device(hwdev, handle, size, dir);
-}
-
-static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
-            dma_addr_t dev_addr, unsigned long offset, size_t size,
-            enum dma_data_direction dir, unsigned long attrs)
-{
-       unsigned long page_pfn = page_to_xen_pfn(page);
-       unsigned long dev_pfn = XEN_PFN_DOWN(dev_addr);
-       unsigned long compound_pages =
-               (1<<compound_order(page)) * XEN_PFN_PER_PAGE;
-       bool local = (page_pfn <= dev_pfn) &&
-               (dev_pfn - page_pfn < compound_pages);
-
-       if (local)
-               dma_direct_map_page(hwdev, page, offset, size, dir, attrs);
-       else
-               __xen_dma_map_page(hwdev, page, dev_addr, offset, size, dir, attrs);
-}
-
-static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
-               size_t size, enum dma_data_direction dir, unsigned long attrs)
-{
-       unsigned long pfn = PFN_DOWN(handle);
-       /*
-        * Dom0 is mapped 1:1, while the Linux page can be spanned accross
-        * multiple Xen page, it's not possible to have a mix of local and
-        * foreign Xen page. Dom0 is mapped 1:1, so calling pfn_valid on a
-        * foreign mfn will always return false. If the page is local we can
-        * safely call the native dma_ops function, otherwise we call the xen
-        * specific function.
-        */
-       if (pfn_valid(pfn))
-               dma_direct_unmap_page(hwdev, handle, size, dir, attrs);
-       else
-               __xen_dma_unmap_page(hwdev, handle, size, dir, attrs);
-}
-
-#endif /* _ASM_ARM_XEN_PAGE_COHERENT_H */

diff --git a/arch/arm64/include/asm/xen/page-coherent.h b/arch/arm64/include/asm/xen/page-coherent.h
index d88e56b90b93a55fa972fbf22b518c17bdfba1cb..27e984977402b27ef5904ba827a899115d366c6d 100644 (file)
--- a/arch/arm64/include/asm/xen/page-coherent.h
+++ b/arch/arm64/include/asm/xen/page-coherent.h
@@ -1,77 +1,2 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_ARM64_XEN_PAGE_COHERENT_H
-#define _ASM_ARM64_XEN_PAGE_COHERENT_H
-
-#include <linux/dma-mapping.h>
-#include <asm/page.h>
 #include <xen/arm/page-coherent.h>
-
-static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
-               dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs)
-{
-       return dma_direct_alloc(hwdev, size, dma_handle, flags, attrs);
-}
-
-static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
-               void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs)
-{
-       dma_direct_free(hwdev, size, cpu_addr, dma_handle, attrs);
-}
-
-static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
-               dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
-       unsigned long pfn = PFN_DOWN(handle);
-
-       if (pfn_valid(pfn))
-               dma_direct_sync_single_for_cpu(hwdev, handle, size, dir);
-       else
-               __xen_dma_sync_single_for_cpu(hwdev, handle, size, dir);
-}
-
-static inline void xen_dma_sync_single_for_device(struct device *hwdev,
-               dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
-       unsigned long pfn = PFN_DOWN(handle);
-       if (pfn_valid(pfn))
-               dma_direct_sync_single_for_device(hwdev, handle, size, dir);
-       else
-               __xen_dma_sync_single_for_device(hwdev, handle, size, dir);
-}
-
-static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
-            dma_addr_t dev_addr, unsigned long offset, size_t size,
-            enum dma_data_direction dir, unsigned long attrs)
-{
-       unsigned long page_pfn = page_to_xen_pfn(page);
-       unsigned long dev_pfn = XEN_PFN_DOWN(dev_addr);
-       unsigned long compound_pages =
-               (1<<compound_order(page)) * XEN_PFN_PER_PAGE;
-       bool local = (page_pfn <= dev_pfn) &&
-               (dev_pfn - page_pfn < compound_pages);
-
-       if (local)
-               dma_direct_map_page(hwdev, page, offset, size, dir, attrs);
-       else
-               __xen_dma_map_page(hwdev, page, dev_addr, offset, size, dir, attrs);
-}
-
-static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
-               size_t size, enum dma_data_direction dir, unsigned long attrs)
-{
-       unsigned long pfn = PFN_DOWN(handle);
-       /*
-        * Dom0 is mapped 1:1, while the Linux page can be spanned accross
-        * multiple Xen page, it's not possible to have a mix of local and
-        * foreign Xen page. Dom0 is mapped 1:1, so calling pfn_valid on a
-        * foreign mfn will always return false. If the page is local we can
-        * safely call the native dma_ops function, otherwise we call the xen
-        * specific function.
-        */
-       if (pfn_valid(pfn))
-               dma_direct_unmap_page(hwdev, handle, size, dir, attrs);
-       else
-               __xen_dma_unmap_page(hwdev, handle, size, dir, attrs);
-}
-
-#endif /* _ASM_ARM64_XEN_PAGE_COHERENT_H */

diff --git a/include/xen/arm/page-coherent.h b/include/xen/arm/page-coherent.h
index 2ca9164a79bfdcc1c48844692c874b823e6f87a0..a840d6949a87c5941f72f9fd3499b6cd780ed89e 100644 (file)
--- a/include/xen/arm/page-coherent.h
+++ b/include/xen/arm/page-coherent.h
@@ -2,6 +2,9 @@
 #ifndef _XEN_ARM_PAGE_COHERENT_H
 #define _XEN_ARM_PAGE_COHERENT_H
 
+#include <linux/dma-mapping.h>
+#include <asm/page.h>
+
 void __xen_dma_map_page(struct device *hwdev, struct page *page,
             dma_addr_t dev_addr, unsigned long offset, size_t size,
             enum dma_data_direction dir, unsigned long attrs);
@@ -13,4 +16,81 @@ void __xen_dma_sync_single_for_cpu(struct device *hwdev,
 void __xen_dma_sync_single_for_device(struct device *hwdev,
                dma_addr_t handle, size_t size, enum dma_data_direction dir);
 
+static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
+               dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs)
+{
+       return dma_direct_alloc(hwdev, size, dma_handle, flags, attrs);
+}
+
+static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
+               void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs)
+{
+       dma_direct_free(hwdev, size, cpu_addr, dma_handle, attrs);
+}
+
+static inline void xen_dma_sync_single_for_cpu(struct device *hwdev,
+               dma_addr_t handle, size_t size, enum dma_data_direction dir)
+{
+       unsigned long pfn = PFN_DOWN(handle);
+
+       if (pfn_valid(pfn))
+               dma_direct_sync_single_for_cpu(hwdev, handle, size, dir);
+       else
+               __xen_dma_sync_single_for_cpu(hwdev, handle, size, dir);
+}
+
+static inline void xen_dma_sync_single_for_device(struct device *hwdev,
+               dma_addr_t handle, size_t size, enum dma_data_direction dir)
+{
+       unsigned long pfn = PFN_DOWN(handle);
+       if (pfn_valid(pfn))
+               dma_direct_sync_single_for_device(hwdev, handle, size, dir);
+       else
+               __xen_dma_sync_single_for_device(hwdev, handle, size, dir);
+}
+
+static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
+            dma_addr_t dev_addr, unsigned long offset, size_t size,
+            enum dma_data_direction dir, unsigned long attrs)
+{
+       unsigned long page_pfn = page_to_xen_pfn(page);
+       unsigned long dev_pfn = XEN_PFN_DOWN(dev_addr);
+       unsigned long compound_pages =
+               (1<<compound_order(page)) * XEN_PFN_PER_PAGE;
+       bool local = (page_pfn <= dev_pfn) &&
+               (dev_pfn - page_pfn < compound_pages);
+
+       /*
+        * Dom0 is mapped 1:1, while the Linux page can span across
+        * multiple Xen pages, it's not possible for it to contain a
+        * mix of local and foreign Xen pages. So if the first xen_pfn
+        * == mfn the page is local otherwise it's a foreign page
+        * grant-mapped in dom0. If the page is local we can safely
+        * call the native dma_ops function, otherwise we call the xen
+        * specific function.
+        */
+       if (local)
+               dma_direct_map_page(hwdev, page, offset, size, dir, attrs);
+       else
+               __xen_dma_map_page(hwdev, page, dev_addr, offset, size, dir, attrs);
+}
+
+static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
+               size_t size, enum dma_data_direction dir, unsigned long attrs)
+{
+       unsigned long pfn = PFN_DOWN(handle);
+       /*
+        * Dom0 is mapped 1:1, while the Linux page can be spanned accross
+        * multiple Xen page, it's not possible to have a mix of local and
+        * foreign Xen page. Dom0 is mapped 1:1, so calling pfn_valid on a
+        * foreign mfn will always return false. If the page is local we can
+        * safely call the native dma_ops function, otherwise we call the xen
+        * specific function.
+        */
+       if (pfn_valid(pfn))
+               dma_direct_unmap_page(hwdev, handle, size, dir, attrs);
+       else
+               __xen_dma_unmap_page(hwdev, handle, size, dir, attrs);
+}
+
 #endif /* _XEN_ARM_PAGE_COHERENT_H */