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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2014-11-21 14:06:39 +0300
committerDavid Vrabel <david.vrabel@citrix.com>2014-12-04 15:41:53 +0300
commit5121872afe0e6470bc6b41637b258fa6e314be4f (patch)
tree184de018a4ef429eec9ffbd83e7b3e9379c7374f /arch/arm/xen
parent3567258d281b5b515d5165ed23851d9f84087e7d (diff)
downloadlinux-5121872afe0e6470bc6b41637b258fa6e314be4f.tar.xz
xen/arm/arm64: merge xen/mm32.c into xen/mm.c
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>
Diffstat (limited to 'arch/arm/xen')
-rw-r--r--arch/arm/xen/Makefile2
-rw-r--r--arch/arm/xen/mm.c84
-rw-r--r--arch/arm/xen/mm32.c94
3 files changed, 85 insertions, 95 deletions
diff --git a/arch/arm/xen/Makefile b/arch/arm/xen/Makefile
index 1f85bfe6b470..12969523414c 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 b0e77de99148..ab700e1e5922 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 c86919bbea83..000000000000
--- 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);