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ee664a9252
This converts SPARC to use asm-generic/pci-dma-compat instead of the homegrown mechnism. SPARC32 has two dma_map_ops structures for pci and sbus (removing arch/sparc/kernel/dma.c, PCI and SBUS DMA accessor). The global 'dma_ops' is set to sbus_dma_ops and get_dma_ops() returns pci32_dma_ops for pci devices so we can use the appropriate dma mapping operations. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Acked-by: David S. Miller <davem@davemloft.net> Cc: tony.luck@intel.com Cc: fenghua.yu@intel.com LKML-Reference: <1249872797-1314-8-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
40 lines
934 B
C
40 lines
934 B
C
/* dma.c: PCI and SBUS DMA accessors for 32-bit sparc.
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*
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* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
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*/
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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 <linux/scatterlist.h>
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#include <linux/mm.h>
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#ifdef CONFIG_PCI
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#include <linux/pci.h>
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#endif
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/*
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* Return whether the given PCI device DMA address mask can be
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* supported properly. For example, if your device can only drive the
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* low 24-bits during PCI bus mastering, then you would pass
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* 0x00ffffff as the mask to this function.
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*/
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int dma_supported(struct device *dev, u64 mask)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type)
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return 1;
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#endif
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return 0;
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}
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EXPORT_SYMBOL(dma_supported);
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int dma_set_mask(struct device *dev, u64 dma_mask)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type)
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return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
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#endif
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return -EOPNOTSUPP;
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}
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EXPORT_SYMBOL(dma_set_mask);
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