c786df08f6
We provide a map_error function in pci-base_32.c to make sure i386 keeps with the same behaviour it used to. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
#include <linux/mm.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <asm/dma-mapping.h>
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static dma_addr_t pci32_map_single(struct device *dev, phys_addr_t ptr,
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size_t size, int direction)
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{
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WARN_ON(size == 0);
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flush_write_buffers();
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return ptr;
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}
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static int pci32_dma_map_sg(struct device *dev, struct scatterlist *sglist,
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int nents, int direction)
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{
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struct scatterlist *sg;
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int i;
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WARN_ON(nents == 0 || sglist[0].length == 0);
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for_each_sg(sglist, sg, nents, i) {
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BUG_ON(!sg_page(sg));
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sg->dma_address = sg_phys(sg);
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}
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flush_write_buffers();
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return nents;
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}
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/* Make sure we keep the same behaviour */
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static int pci32_map_error(dma_addr_t dma_addr)
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{
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return 0;
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}
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static const struct dma_mapping_ops pci32_dma_ops = {
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.map_single = pci32_map_single,
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.unmap_single = NULL,
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.map_sg = pci32_dma_map_sg,
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.unmap_sg = NULL,
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.sync_single_for_cpu = NULL,
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.sync_single_for_device = NULL,
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.sync_single_range_for_cpu = NULL,
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.sync_single_range_for_device = NULL,
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.sync_sg_for_cpu = NULL,
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.sync_sg_for_device = NULL,
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.mapping_error = pci32_map_error,
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};
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const struct dma_mapping_ops *dma_ops = &pci32_dma_ops;
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EXPORT_SYMBOL(dma_ops);
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