/* * linux/arch/alpha/kernel/pci-noop.c * * Stub PCI interfaces for Jensen-specific kernels. */ #include <linux/pci.h> #include <linux/init.h> #include <linux/bootmem.h> #include <linux/capability.h> #include <linux/mm.h> #include <linux/errno.h> #include <linux/sched.h> #include <linux/dma-mapping.h> #include "proto.h" /* * The PCI controller list. */ struct pci_controller *hose_head, **hose_tail = &hose_head; struct pci_controller *pci_isa_hose; struct pci_controller * __init alloc_pci_controller(void) { struct pci_controller *hose; hose = alloc_bootmem(sizeof(*hose)); *hose_tail = hose; hose_tail = &hose->next; return hose; } struct resource * __init alloc_resource(void) { struct resource *res; res = alloc_bootmem(sizeof(*res)); return res; } asmlinkage long sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn) { struct pci_controller *hose; /* from hose or from bus.devfn */ if (which & IOBASE_FROM_HOSE) { for (hose = hose_head; hose; hose = hose->next) if (hose->index == bus) break; if (!hose) return -ENODEV; } else { /* Special hook for ISA access. */ if (bus == 0 && dfn == 0) hose = pci_isa_hose; else return -ENODEV; } switch (which & ~IOBASE_FROM_HOSE) { case IOBASE_HOSE: return hose->index; case IOBASE_SPARSE_MEM: return hose->sparse_mem_base; case IOBASE_DENSE_MEM: return hose->dense_mem_base; case IOBASE_SPARSE_IO: return hose->sparse_io_base; case IOBASE_DENSE_IO: return hose->dense_io_base; case IOBASE_ROOT_BUS: return hose->bus->number; } return -EOPNOTSUPP; } asmlinkage long sys_pciconfig_read(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, void *buf) { if (!capable(CAP_SYS_ADMIN)) return -EPERM; else return -ENODEV; } asmlinkage long sys_pciconfig_write(unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len, void *buf) { if (!capable(CAP_SYS_ADMIN)) return -EPERM; else return -ENODEV; } /* Stubs for the routines in pci_iommu.c: */ void * pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp) { return NULL; } void pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr, dma_addr_t dma_addr) { } dma_addr_t pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size, int direction) { return (dma_addr_t) 0; } void pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, int direction) { } int pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, int direction) { return 0; } void pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, int direction) { } int pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask) { return 0; } /* Generic DMA mapping functions: */ void * dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp) { void *ret; if (!dev || *dev->dma_mask >= 0xffffffffUL) gfp &= ~GFP_DMA; ret = (void *)__get_free_pages(gfp, get_order(size)); if (ret) { memset(ret, 0, size); *dma_handle = virt_to_bus(ret); } return ret; } EXPORT_SYMBOL(dma_alloc_coherent); int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction direction) { int i; for (i = 0; i < nents; i++ ) { void *va; BUG_ON(!sg[i].page); va = page_address(sg[i].page) + sg[i].offset; sg_dma_address(sg + i) = (dma_addr_t)virt_to_bus(va); sg_dma_len(sg + i) = sg[i].length; } return nents; } EXPORT_SYMBOL(dma_map_sg); int dma_set_mask(struct device *dev, u64 mask) { if (!dev->dma_mask || !dma_supported(dev, mask)) return -EIO; *dev->dma_mask = mask; return 0; } EXPORT_SYMBOL(dma_set_mask); void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { return NULL; } void pci_iounmap(struct pci_dev *dev, void __iomem * addr) { } EXPORT_SYMBOL(pci_iomap); EXPORT_SYMBOL(pci_iounmap);