forked from Minki/linux
25c9dbe8bb
This makes the function both more readable and more typesafe. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Helge Deller <deller@gmx.de>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
#ifndef _IOMMU_H
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#define _IOMMU_H 1
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#include <linux/pci.h>
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struct parisc_device;
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struct ioc;
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static inline void *parisc_walk_tree(struct device *dev)
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{
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struct device *otherdev;
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if (likely(dev->platform_data))
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return dev->platform_data;
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/* OK, just traverse the bus to find it */
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for (otherdev = dev->parent;
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otherdev;
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otherdev = otherdev->parent) {
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if (otherdev->platform_data) {
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dev->platform_data = otherdev->platform_data;
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break;
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}
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}
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return dev->platform_data;
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}
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static inline struct ioc *GET_IOC(struct device *dev)
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{
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struct pci_hba_data *pdata = parisc_walk_tree(dev);
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if (!pdata)
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return NULL;
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return pdata->iommu;
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}
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#ifdef CONFIG_IOMMU_CCIO
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void *ccio_get_iommu(const struct parisc_device *dev);
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int ccio_request_resource(const struct parisc_device *dev,
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struct resource *res);
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int ccio_allocate_resource(const struct parisc_device *dev,
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struct resource *res, unsigned long size,
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unsigned long min, unsigned long max, unsigned long align);
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#else /* !CONFIG_IOMMU_CCIO */
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#define ccio_get_iommu(dev) NULL
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#define ccio_request_resource(dev, res) insert_resource(&iomem_resource, res)
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#define ccio_allocate_resource(dev, res, size, min, max, align) \
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allocate_resource(&iomem_resource, res, size, min, max, \
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align, NULL, NULL)
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#endif /* !CONFIG_IOMMU_CCIO */
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void *sba_get_iommu(struct parisc_device *dev);
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#endif /* _IOMMU_H */
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