11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/arch/alpha/kernel/pci-noop.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Stub PCI interfaces for Jensen-specific kernels. 51da177e4SLinus Torvalds */ 61da177e4SLinus Torvalds 71da177e4SLinus Torvalds #include <linux/pci.h> 81da177e4SLinus Torvalds #include <linux/init.h> 91da177e4SLinus Torvalds #include <linux/bootmem.h> 101da177e4SLinus Torvalds #include <linux/mm.h> 111da177e4SLinus Torvalds #include <linux/errno.h> 121da177e4SLinus Torvalds #include <linux/sched.h> 131da177e4SLinus Torvalds #include <linux/dma-mapping.h> 141da177e4SLinus Torvalds 151da177e4SLinus Torvalds #include "proto.h" 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds 181da177e4SLinus Torvalds /* 191da177e4SLinus Torvalds * The PCI controller list. 201da177e4SLinus Torvalds */ 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds struct pci_controller *hose_head, **hose_tail = &hose_head; 231da177e4SLinus Torvalds struct pci_controller *pci_isa_hose; 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds struct pci_controller * __init 271da177e4SLinus Torvalds alloc_pci_controller(void) 281da177e4SLinus Torvalds { 291da177e4SLinus Torvalds struct pci_controller *hose; 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds hose = alloc_bootmem(sizeof(*hose)); 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds *hose_tail = hose; 341da177e4SLinus Torvalds hose_tail = &hose->next; 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds return hose; 371da177e4SLinus Torvalds } 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds struct resource * __init 401da177e4SLinus Torvalds alloc_resource(void) 411da177e4SLinus Torvalds { 421da177e4SLinus Torvalds struct resource *res; 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds res = alloc_bootmem(sizeof(*res)); 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds return res; 471da177e4SLinus Torvalds } 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds asmlinkage long 501da177e4SLinus Torvalds sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn) 511da177e4SLinus Torvalds { 521da177e4SLinus Torvalds struct pci_controller *hose; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds /* from hose or from bus.devfn */ 551da177e4SLinus Torvalds if (which & IOBASE_FROM_HOSE) { 561da177e4SLinus Torvalds for (hose = hose_head; hose; hose = hose->next) 571da177e4SLinus Torvalds if (hose->index == bus) 581da177e4SLinus Torvalds break; 591da177e4SLinus Torvalds if (!hose) 601da177e4SLinus Torvalds return -ENODEV; 611da177e4SLinus Torvalds } else { 621da177e4SLinus Torvalds /* Special hook for ISA access. */ 631da177e4SLinus Torvalds if (bus == 0 && dfn == 0) 641da177e4SLinus Torvalds hose = pci_isa_hose; 651da177e4SLinus Torvalds else 661da177e4SLinus Torvalds return -ENODEV; 671da177e4SLinus Torvalds } 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds switch (which & ~IOBASE_FROM_HOSE) { 701da177e4SLinus Torvalds case IOBASE_HOSE: 711da177e4SLinus Torvalds return hose->index; 721da177e4SLinus Torvalds case IOBASE_SPARSE_MEM: 731da177e4SLinus Torvalds return hose->sparse_mem_base; 741da177e4SLinus Torvalds case IOBASE_DENSE_MEM: 751da177e4SLinus Torvalds return hose->dense_mem_base; 761da177e4SLinus Torvalds case IOBASE_SPARSE_IO: 771da177e4SLinus Torvalds return hose->sparse_io_base; 781da177e4SLinus Torvalds case IOBASE_DENSE_IO: 791da177e4SLinus Torvalds return hose->dense_io_base; 801da177e4SLinus Torvalds case IOBASE_ROOT_BUS: 811da177e4SLinus Torvalds return hose->bus->number; 821da177e4SLinus Torvalds } 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds return -EOPNOTSUPP; 851da177e4SLinus Torvalds } 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds asmlinkage long 881da177e4SLinus Torvalds sys_pciconfig_read(unsigned long bus, unsigned long dfn, 891da177e4SLinus Torvalds unsigned long off, unsigned long len, void *buf) 901da177e4SLinus Torvalds { 911da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 921da177e4SLinus Torvalds return -EPERM; 931da177e4SLinus Torvalds else 941da177e4SLinus Torvalds return -ENODEV; 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds asmlinkage long 981da177e4SLinus Torvalds sys_pciconfig_write(unsigned long bus, unsigned long dfn, 991da177e4SLinus Torvalds unsigned long off, unsigned long len, void *buf) 1001da177e4SLinus Torvalds { 1011da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 1021da177e4SLinus Torvalds return -EPERM; 1031da177e4SLinus Torvalds else 1041da177e4SLinus Torvalds return -ENODEV; 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds /* Stubs for the routines in pci_iommu.c: */ 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds void * 1101da177e4SLinus Torvalds pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp) 1111da177e4SLinus Torvalds { 1121da177e4SLinus Torvalds return NULL; 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds void 1161da177e4SLinus Torvalds pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr, 1171da177e4SLinus Torvalds dma_addr_t dma_addr) 1181da177e4SLinus Torvalds { 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds dma_addr_t 1221da177e4SLinus Torvalds pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size, 1231da177e4SLinus Torvalds int direction) 1241da177e4SLinus Torvalds { 1251da177e4SLinus Torvalds return (dma_addr_t) 0; 1261da177e4SLinus Torvalds } 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds void 1291da177e4SLinus Torvalds pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, 1301da177e4SLinus Torvalds int direction) 1311da177e4SLinus Torvalds { 1321da177e4SLinus Torvalds } 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds int 1351da177e4SLinus Torvalds pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, 1361da177e4SLinus Torvalds int direction) 1371da177e4SLinus Torvalds { 1381da177e4SLinus Torvalds return 0; 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds void 1421da177e4SLinus Torvalds pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, 1431da177e4SLinus Torvalds int direction) 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds } 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds int 1481da177e4SLinus Torvalds pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask) 1491da177e4SLinus Torvalds { 1501da177e4SLinus Torvalds return 0; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds /* Generic DMA mapping functions: */ 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds void * 1561da177e4SLinus Torvalds dma_alloc_coherent(struct device *dev, size_t size, 15755c5d74bSAl Viro dma_addr_t *dma_handle, gfp_t gfp) 1581da177e4SLinus Torvalds { 1591da177e4SLinus Torvalds void *ret; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds if (!dev || *dev->dma_mask >= 0xffffffffUL) 1621da177e4SLinus Torvalds gfp &= ~GFP_DMA; 1631da177e4SLinus Torvalds ret = (void *)__get_free_pages(gfp, get_order(size)); 1641da177e4SLinus Torvalds if (ret) { 1651da177e4SLinus Torvalds memset(ret, 0, size); 1661da177e4SLinus Torvalds *dma_handle = virt_to_bus(ret); 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds return ret; 1691da177e4SLinus Torvalds } 1701da177e4SLinus Torvalds 1711da177e4SLinus Torvalds EXPORT_SYMBOL(dma_alloc_coherent); 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds int 1741da177e4SLinus Torvalds dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, 1751da177e4SLinus Torvalds enum dma_data_direction direction) 1761da177e4SLinus Torvalds { 1771da177e4SLinus Torvalds int i; 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds for (i = 0; i < nents; i++ ) { 1801da177e4SLinus Torvalds void *va; 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds BUG_ON(!sg[i].page); 1831da177e4SLinus Torvalds va = page_address(sg[i].page) + sg[i].offset; 1841da177e4SLinus Torvalds sg_dma_address(sg + i) = (dma_addr_t)virt_to_bus(va); 1851da177e4SLinus Torvalds sg_dma_len(sg + i) = sg[i].length; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds return nents; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds EXPORT_SYMBOL(dma_map_sg); 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds int 1941da177e4SLinus Torvalds dma_set_mask(struct device *dev, u64 mask) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds if (!dev->dma_mask || !dma_supported(dev, mask)) 1971da177e4SLinus Torvalds return -EIO; 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds *dev->dma_mask = mask; 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds return 0; 2021da177e4SLinus Torvalds } 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) 2051da177e4SLinus Torvalds { 2061da177e4SLinus Torvalds return NULL; 2071da177e4SLinus Torvalds } 2081da177e4SLinus Torvalds 2091da177e4SLinus Torvalds void pci_iounmap(struct pci_dev *dev, void __iomem * addr) 2101da177e4SLinus Torvalds { 2111da177e4SLinus Torvalds } 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds EXPORT_SYMBOL(pci_iomap); 2141da177e4SLinus Torvalds EXPORT_SYMBOL(pci_iounmap); 215