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Diffstat (limited to 'kernel/dma/virt.c')
-rw-r--r--kernel/dma/virt.c61
1 files changed, 0 insertions, 61 deletions
diff --git a/kernel/dma/virt.c b/kernel/dma/virt.c
deleted file mode 100644
index 59d32317dd57..000000000000
--- a/kernel/dma/virt.c
+++ /dev/null
@@ -1,61 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * DMA operations that map to virtual addresses without flushing memory.
- */
-#include <linux/export.h>
-#include <linux/mm.h>
-#include <linux/dma-map-ops.h>
-#include <linux/scatterlist.h>
-
-static void *dma_virt_alloc(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp,
- unsigned long attrs)
-{
- void *ret;
-
- ret = (void *)__get_free_pages(gfp | __GFP_ZERO, get_order(size));
- if (ret)
- *dma_handle = (uintptr_t)ret;
- return ret;
-}
-
-static void dma_virt_free(struct device *dev, size_t size,
- void *cpu_addr, dma_addr_t dma_addr,
- unsigned long attrs)
-{
- free_pages((unsigned long)cpu_addr, get_order(size));
-}
-
-static dma_addr_t dma_virt_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- unsigned long attrs)
-{
- return (uintptr_t)(page_address(page) + offset);
-}
-
-static int dma_virt_map_sg(struct device *dev, struct scatterlist *sgl,
- int nents, enum dma_data_direction dir,
- unsigned long attrs)
-{
- int i;
- struct scatterlist *sg;
-
- for_each_sg(sgl, sg, nents, i) {
- BUG_ON(!sg_page(sg));
- sg_dma_address(sg) = (uintptr_t)sg_virt(sg);
- sg_dma_len(sg) = sg->length;
- }
-
- return nents;
-}
-
-const struct dma_map_ops dma_virt_ops = {
- .alloc = dma_virt_alloc,
- .free = dma_virt_free,
- .map_page = dma_virt_map_page,
- .map_sg = dma_virt_map_sg,
- .alloc_pages = dma_common_alloc_pages,
- .free_pages = dma_common_free_pages,
-};
-EXPORT_SYMBOL(dma_virt_ops);