1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/base/dma-removed.c b/drivers/base/dma-removed.c
new file mode 100644
index 00000000000..004827a65e4
--- /dev/null
+++ b/drivers/base/dma-removed.c
@@ -0,0 +1,153 @@
+/*
+ *
+ *  Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
+ *  Copyright (C) 2000-2004 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/gfp.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/dma-contiguous.h>
+#include <linux/highmem.h>
+#include <linux/memblock.h>
+#include <linux/slab.h>
+#include <linux/iommu.h>
+#include <linux/io.h>
+#include <linux/vmalloc.h>
+#include <linux/sizes.h>
+
+#define NO_KERNEL_MAPPING_DUMMY	0x2222
+
+void *removed_alloc(struct device *dev, size_t size, dma_addr_t *handle,
+		    gfp_t gfp, struct dma_attrs *attrs)
+{
+	bool no_kernel_mapping = dma_get_attr(DMA_ATTR_NO_KERNEL_MAPPING,
+					attrs);
+	unsigned long pfn;
+	unsigned long order = get_order(size);
+	void *addr = NULL;
+
+	size = PAGE_ALIGN(size);
+
+	if (!(gfp & __GFP_WAIT))
+		return NULL;
+
+	pfn = dma_alloc_from_contiguous(dev, size >> PAGE_SHIFT, order);
+
+	if (pfn) {
+		addr = ioremap(__pfn_to_phys(pfn), size);
+		memset(addr, 0, size);
+		if (no_kernel_mapping) {
+			iounmap(addr);
+			addr = (void *)NO_KERNEL_MAPPING_DUMMY;
+		}
+		if (addr)
+			*handle = __pfn_to_phys(pfn);
+
+	}
+
+	return addr;
+}
+
+
+int removed_mmap(struct device *dev, struct vm_area_struct *vma,
+		 void *cpu_addr, dma_addr_t dma_addr, size_t size,
+		 struct dma_attrs *attrs)
+{
+	return -ENXIO;
+}
+
+void removed_free(struct device *dev, size_t size, void *cpu_addr,
+		  dma_addr_t handle, struct dma_attrs *attrs)
+{
+	bool no_kernel_mapping = dma_get_attr(DMA_ATTR_NO_KERNEL_MAPPING,
+					attrs);
+
+	if (!no_kernel_mapping)
+		iounmap(cpu_addr);
+	dma_release_from_contiguous(dev, __phys_to_pfn(handle),
+					size >> PAGE_SHIFT);
+}
+
+static dma_addr_t removed_map_page(struct device *dev, struct page *page,
+			unsigned long offset, size_t size,
+			enum dma_data_direction dir,
+			struct dma_attrs *attrs)
+{
+	return ~(dma_addr_t)0;
+}
+
+static void removed_unmap_page(struct device *dev, dma_addr_t dma_handle,
+		size_t size, enum dma_data_direction dir,
+		struct dma_attrs *attrs)
+{
+	return;
+}
+
+static int removed_map_sg(struct device *dev, struct scatterlist *sg,
+			int nents, enum dma_data_direction dir,
+			struct dma_attrs *attrs)
+{
+	return 0;
+}
+
+static void removed_unmap_sg(struct device *dev,
+			struct scatterlist *sg, int nents,
+			enum dma_data_direction dir,
+			struct dma_attrs *attrs)
+{
+	return;
+}
+
+static void removed_sync_single_for_cpu(struct device *dev,
+			dma_addr_t dma_handle, size_t size,
+			enum dma_data_direction dir)
+{
+	return;
+}
+
+void removed_sync_single_for_device(struct device *dev,
+			dma_addr_t dma_handle, size_t size,
+			enum dma_data_direction dir)
+{
+	return;
+}
+
+void removed_sync_sg_for_cpu(struct device *dev,
+			struct scatterlist *sg, int nents,
+			enum dma_data_direction dir)
+{
+	return;
+}
+
+void removed_sync_sg_for_device(struct device *dev,
+			struct scatterlist *sg, int nents,
+			enum dma_data_direction dir)
+{
+	return;
+}
+
+struct dma_map_ops removed_dma_ops = {
+	.alloc			= removed_alloc,
+	.free			= removed_free,
+	.mmap			= removed_mmap,
+	.map_page		= removed_map_page,
+	.unmap_page		= removed_unmap_page,
+	.map_sg			= removed_map_sg,
+	.unmap_sg		= removed_unmap_sg,
+	.sync_single_for_cpu	= removed_sync_single_for_cpu,
+	.sync_single_for_device	= removed_sync_single_for_device,
+	.sync_sg_for_cpu	= removed_sync_sg_for_cpu,
+	.sync_sg_for_device	= removed_sync_sg_for_device,
+};
+EXPORT_SYMBOL(removed_dma_ops);
+
+