[PATCH v9 09/13] xen/arm/arm64: merge xen/mm32.c into xen/mm.c

Stefano Stabellini
2014-11-12T11:42:18Z

Merge xen/mm32.c into xen/mm.c.
As a consequence the code gets compiled on arm64 too.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
---
arch/arm/xen/Makefile | 2 +-
arch/arm/xen/mm.c | 84 +++++++++++++++++++++++++
arch/arm/xen/mm32.c | 94 ----------------------------
arch/arm64/include/asm/xen/page-coherent.h | 44 +------------
4 files changed, 86 insertions(+), 138 deletions(-)
delete mode 100644 arch/arm/xen/mm32.c

diff --git a/arch/arm/xen/Makefile b/arch/arm/xen/Makefile
index 1f85bfe..1296952 100644
--- a/arch/arm/xen/Makefile
+++ b/arch/arm/xen/Makefile
@@ -1 +1 @@
-obj-y := enlighten.o hypercall.o grant-table.o p2m.o mm.o mm32.o
+obj-y := enlighten.o hypercall.o grant-table.o p2m.o mm.o
diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
index b0e77de..ab700e1 100644
--- a/arch/arm/xen/mm.c
+++ b/arch/arm/xen/mm.c
@@ -1,6 +1,10 @@
+#include <linux/cpu.h>
+#include <linux/dma-mapping.h>
#include <linux/bootmem.h>
#include <linux/gfp.h>
+#include <linux/highmem.h>
#include <linux/export.h>
+#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/dma-mapping.h>
@@ -16,6 +20,86 @@
#include <asm/xen/hypercall.h>
#include <asm/xen/interface.h>

+enum dma_cache_op {
+ DMA_UNMAP,
+ DMA_MAP,
+};
+
+/* functions called by SWIOTLB */
+
+static void dma_cache_maint(dma_addr_t handle, unsigned long offset,
+ size_t size, enum dma_data_direction dir, enum dma_cache_op op)
+{
+ unsigned long pfn;
+ size_t left = size;
+
+ pfn = (handle >> PAGE_SHIFT) + offset / PAGE_SIZE;
+ offset %= PAGE_SIZE;
+
+ do {
+ size_t len = left;
+
+ /* TODO: cache flush */
+
+ offset = 0;
+ pfn++;
+ left -= len;
+ } while (left);
+}
+
+static void __xen_dma_page_dev_to_cpu(struct device *hwdev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir)
+{
+ dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, DMA_UNMAP);
+}
+
+static void __xen_dma_page_cpu_to_dev(struct device *hwdev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir)
+{
+ dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, DMA_MAP);
+}
+
+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, struct dma_attrs *attrs)
+{
+ if (is_device_dma_coherent(hwdev))
+ return;
+ if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
+ return;
+
+ __xen_dma_page_cpu_to_dev(hwdev, dev_addr, size, dir);
+}
+
+void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
+ size_t size, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+
+{
+ if (is_device_dma_coherent(hwdev))
+ return;
+ if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
+ return;
+
+ __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);
+}
+
+void __xen_dma_sync_single_for_cpu(struct device *hwdev,
+ dma_addr_t handle, size_t size, enum dma_data_direction dir)
+{
+ if (is_device_dma_coherent(hwdev))
+ return;
+ __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);
+}
+
+void __xen_dma_sync_single_for_device(struct device *hwdev,
+ dma_addr_t handle, size_t size, enum dma_data_direction dir)
+{
+ if (is_device_dma_coherent(hwdev))
+ return;
+ __xen_dma_page_cpu_to_dev(hwdev, handle, size, dir);
+}
+
int xen_create_contiguous_region(phys_addr_t pstart, unsigned int order,
unsigned int address_bits,
dma_addr_t *dma_handle)
diff --git a/arch/arm/xen/mm32.c b/arch/arm/xen/mm32.c
deleted file mode 100644
index c86919b..0000000
--- a/arch/arm/xen/mm32.c
+++ /dev/null
@@ -1,94 +0,0 @@
-#include <linux/cpu.h>
-#include <linux/dma-mapping.h>
-#include <linux/gfp.h>
-#include <linux/highmem.h>
-
-#include <xen/features.h>
-enum dma_cache_op {
- DMA_UNMAP,
- DMA_MAP,
-};
-
-/* functions called by SWIOTLB */
-
-static void dma_cache_maint(dma_addr_t handle, unsigned long offset,
- size_t size, enum dma_data_direction dir, enum dma_cache_op op)
-{
- unsigned long pfn;
- size_t left = size;
-
- pfn = (handle >> PAGE_SHIFT) + offset / PAGE_SIZE;
- offset %= PAGE_SIZE;
-
- do {
- size_t len = left;
-
- /* TODO: cache flush */
-
- offset = 0;
- pfn++;
- left -= len;
- } while (left);
-}
-
-static void __xen_dma_page_dev_to_cpu(struct device *hwdev, dma_addr_t handle,
- size_t size, enum dma_data_direction dir)
-{
- dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, DMA_UNMAP);
-}
-
-static void __xen_dma_page_cpu_to_dev(struct device *hwdev, dma_addr_t handle,
- size_t size, enum dma_data_direction dir)
-{
- dma_cache_maint(handle & PAGE_MASK, handle & ~PAGE_MASK, size, dir, DMA_MAP);
-}
-
-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, struct dma_attrs *attrs)
-{
- if (is_device_dma_coherent(hwdev))
- return;
- if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
- return;
-
- __xen_dma_page_cpu_to_dev(hwdev, dev_addr, size, dir);
-}
-
-void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
- size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs)
-
-{
- if (is_device_dma_coherent(hwdev))
- return;
- if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
- return;
-
- __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);
-}
-
-void __xen_dma_sync_single_for_cpu(struct device *hwdev,
- dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
- if (is_device_dma_coherent(hwdev))
- return;
- __xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);
-}
-
-void __xen_dma_sync_single_for_device(struct device *hwdev,
- dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
- if (is_device_dma_coherent(hwdev))
- return;
- __xen_dma_page_cpu_to_dev(hwdev, handle, size, dir);
-}
-
-int __init xen_mm32_init(void)
-{
- if (!xen_initial_domain())
- return 0;
-
- return 0;
-}
-arch_initcall(xen_mm32_init);
diff --git a/arch/arm64/include/asm/xen/page-coherent.h b/arch/arm64/include/asm/xen/page-coherent.h
index d7cd4c2..2052102 100644
--- a/arch/arm64/include/asm/xen/page-coherent.h
+++ b/arch/arm64/include/asm/xen/page-coherent.h
@@ -1,43 +1 @@
-#ifndef _ASM_ARM64_XEN_PAGE_COHERENT_H
-#define _ASM_ARM64_XEN_PAGE_COHERENT_H
-
-#include <asm/page.h>
-#include <linux/dma-attrs.h>
-#include <linux/dma-mapping.h>
-
-static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
- dma_addr_t *dma_handle, gfp_t flags,
- struct dma_attrs *attrs)
-{
- return __generic_dma_ops(hwdev)->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,
- struct dma_attrs *attrs)
-{
- __generic_dma_ops(hwdev)->free(hwdev, size, cpu_addr, dma_handle, attrs);
-}
-
-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, struct dma_attrs *attrs)
-{
-}
-
-static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
- size_t size, enum dma_data_direction dir,
- struct dma_attrs *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)
-{
-}
-
-static inline void xen_dma_sync_single_for_device(struct device *hwdev,
- dma_addr_t handle, size_t size, enum dma_data_direction dir)
-{
-}
-#endif /* _ASM_ARM64_XEN_PAGE_COHERENT_H */
+#include <../../arm/include/asm/xen/page-coherent.h>
--
1.7.10.4