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-rw-r--r--lib/dma-noncoherent.c102
1 files changed, 0 insertions, 102 deletions
diff --git a/lib/dma-noncoherent.c b/lib/dma-noncoherent.c
deleted file mode 100644
index 79e9a757387f..000000000000
--- a/lib/dma-noncoherent.c
+++ /dev/null
@@ -1,102 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2018 Christoph Hellwig.
- *
- * DMA operations that map physical memory directly without providing cache
- * coherence.
- */
-#include <linux/export.h>
-#include <linux/mm.h>
-#include <linux/dma-direct.h>
-#include <linux/dma-noncoherent.h>
-#include <linux/scatterlist.h>
-
-static void dma_noncoherent_sync_single_for_device(struct device *dev,
- dma_addr_t addr, size_t size, enum dma_data_direction dir)
-{
- arch_sync_dma_for_device(dev, dma_to_phys(dev, addr), size, dir);
-}
-
-static void dma_noncoherent_sync_sg_for_device(struct device *dev,
- struct scatterlist *sgl, int nents, enum dma_data_direction dir)
-{
- struct scatterlist *sg;
- int i;
-
- for_each_sg(sgl, sg, nents, i)
- arch_sync_dma_for_device(dev, sg_phys(sg), sg->length, dir);
-}
-
-static dma_addr_t dma_noncoherent_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size, enum dma_data_direction dir,
- unsigned long attrs)
-{
- dma_addr_t addr;
-
- addr = dma_direct_map_page(dev, page, offset, size, dir, attrs);
- if (!dma_mapping_error(dev, addr) && !(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- arch_sync_dma_for_device(dev, page_to_phys(page) + offset,
- size, dir);
- return addr;
-}
-
-static int dma_noncoherent_map_sg(struct device *dev, struct scatterlist *sgl,
- int nents, enum dma_data_direction dir, unsigned long attrs)
-{
- nents = dma_direct_map_sg(dev, sgl, nents, dir, attrs);
- if (nents > 0 && !(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- dma_noncoherent_sync_sg_for_device(dev, sgl, nents, dir);
- return nents;
-}
-
-#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU
-static void dma_noncoherent_sync_single_for_cpu(struct device *dev,
- dma_addr_t addr, size_t size, enum dma_data_direction dir)
-{
- arch_sync_dma_for_cpu(dev, dma_to_phys(dev, addr), size, dir);
-}
-
-static void dma_noncoherent_sync_sg_for_cpu(struct device *dev,
- struct scatterlist *sgl, int nents, enum dma_data_direction dir)
-{
- struct scatterlist *sg;
- int i;
-
- for_each_sg(sgl, sg, nents, i)
- arch_sync_dma_for_cpu(dev, sg_phys(sg), sg->length, dir);
-}
-
-static void dma_noncoherent_unmap_page(struct device *dev, dma_addr_t addr,
- size_t size, enum dma_data_direction dir, unsigned long attrs)
-{
- if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- dma_noncoherent_sync_single_for_cpu(dev, addr, size, dir);
-}
-
-static void dma_noncoherent_unmap_sg(struct device *dev, struct scatterlist *sgl,
- int nents, enum dma_data_direction dir, unsigned long attrs)
-{
- if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- dma_noncoherent_sync_sg_for_cpu(dev, sgl, nents, dir);
-}
-#endif
-
-const struct dma_map_ops dma_noncoherent_ops = {
- .alloc = arch_dma_alloc,
- .free = arch_dma_free,
- .mmap = arch_dma_mmap,
- .sync_single_for_device = dma_noncoherent_sync_single_for_device,
- .sync_sg_for_device = dma_noncoherent_sync_sg_for_device,
- .map_page = dma_noncoherent_map_page,
- .map_sg = dma_noncoherent_map_sg,
-#ifdef CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU
- .sync_single_for_cpu = dma_noncoherent_sync_single_for_cpu,
- .sync_sg_for_cpu = dma_noncoherent_sync_sg_for_cpu,
- .unmap_page = dma_noncoherent_unmap_page,
- .unmap_sg = dma_noncoherent_unmap_sg,
-#endif
- .dma_supported = dma_direct_supported,
- .mapping_error = dma_direct_mapping_error,
- .cache_sync = arch_dma_cache_sync,
-};
-EXPORT_SYMBOL(dma_noncoherent_ops);