1*4882a593Smuzhiyun #ifndef _IOMMU_H
2*4882a593Smuzhiyun #define _IOMMU_H 1
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun #include <linux/pci.h>
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun struct parisc_device;
7*4882a593Smuzhiyun struct ioc;
8*4882a593Smuzhiyun
parisc_walk_tree(struct device * dev)9*4882a593Smuzhiyun static inline struct pci_hba_data *parisc_walk_tree(struct device *dev)
10*4882a593Smuzhiyun {
11*4882a593Smuzhiyun struct device *otherdev;
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun if (likely(dev->platform_data))
14*4882a593Smuzhiyun return dev->platform_data;
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun /* OK, just traverse the bus to find it */
17*4882a593Smuzhiyun for (otherdev = dev->parent;
18*4882a593Smuzhiyun otherdev;
19*4882a593Smuzhiyun otherdev = otherdev->parent) {
20*4882a593Smuzhiyun if (otherdev->platform_data) {
21*4882a593Smuzhiyun dev->platform_data = otherdev->platform_data;
22*4882a593Smuzhiyun break;
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun return dev->platform_data;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
GET_IOC(struct device * dev)29*4882a593Smuzhiyun static inline struct ioc *GET_IOC(struct device *dev)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun struct pci_hba_data *pdata = parisc_walk_tree(dev);
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun if (!pdata)
34*4882a593Smuzhiyun return NULL;
35*4882a593Smuzhiyun return pdata->iommu;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun #ifdef CONFIG_IOMMU_CCIO
39*4882a593Smuzhiyun void *ccio_get_iommu(const struct parisc_device *dev);
40*4882a593Smuzhiyun int ccio_request_resource(const struct parisc_device *dev,
41*4882a593Smuzhiyun struct resource *res);
42*4882a593Smuzhiyun int ccio_allocate_resource(const struct parisc_device *dev,
43*4882a593Smuzhiyun struct resource *res, unsigned long size,
44*4882a593Smuzhiyun unsigned long min, unsigned long max, unsigned long align);
45*4882a593Smuzhiyun #else /* !CONFIG_IOMMU_CCIO */
46*4882a593Smuzhiyun #define ccio_get_iommu(dev) NULL
47*4882a593Smuzhiyun #define ccio_request_resource(dev, res) insert_resource(&iomem_resource, res)
48*4882a593Smuzhiyun #define ccio_allocate_resource(dev, res, size, min, max, align) \
49*4882a593Smuzhiyun allocate_resource(&iomem_resource, res, size, min, max, \
50*4882a593Smuzhiyun align, NULL, NULL)
51*4882a593Smuzhiyun #endif /* !CONFIG_IOMMU_CCIO */
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun void *sba_get_iommu(struct parisc_device *dev);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun #endif /* _IOMMU_H */
56