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> 10a9415644SRandy Dunlap #include <linux/capability.h> 111da177e4SLinus Torvalds #include <linux/mm.h> 121da177e4SLinus Torvalds #include <linux/errno.h> 131da177e4SLinus Torvalds #include <linux/sched.h> 141da177e4SLinus Torvalds #include <linux/dma-mapping.h> 158c8d7214SFUJITA Tomonori #include <linux/scatterlist.h> 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include "proto.h" 181da177e4SLinus Torvalds 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds /* 211da177e4SLinus Torvalds * The PCI controller list. 221da177e4SLinus Torvalds */ 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds struct pci_controller *hose_head, **hose_tail = &hose_head; 251da177e4SLinus Torvalds struct pci_controller *pci_isa_hose; 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds struct pci_controller * __init 291da177e4SLinus Torvalds alloc_pci_controller(void) 301da177e4SLinus Torvalds { 311da177e4SLinus Torvalds struct pci_controller *hose; 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds hose = alloc_bootmem(sizeof(*hose)); 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds *hose_tail = hose; 361da177e4SLinus Torvalds hose_tail = &hose->next; 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds return hose; 391da177e4SLinus Torvalds } 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds struct resource * __init 421da177e4SLinus Torvalds alloc_resource(void) 431da177e4SLinus Torvalds { 441da177e4SLinus Torvalds struct resource *res; 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds res = alloc_bootmem(sizeof(*res)); 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds return res; 491da177e4SLinus Torvalds } 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds asmlinkage long 521da177e4SLinus Torvalds sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn) 531da177e4SLinus Torvalds { 541da177e4SLinus Torvalds struct pci_controller *hose; 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds /* from hose or from bus.devfn */ 571da177e4SLinus Torvalds if (which & IOBASE_FROM_HOSE) { 581da177e4SLinus Torvalds for (hose = hose_head; hose; hose = hose->next) 591da177e4SLinus Torvalds if (hose->index == bus) 601da177e4SLinus Torvalds break; 611da177e4SLinus Torvalds if (!hose) 621da177e4SLinus Torvalds return -ENODEV; 631da177e4SLinus Torvalds } else { 641da177e4SLinus Torvalds /* Special hook for ISA access. */ 651da177e4SLinus Torvalds if (bus == 0 && dfn == 0) 661da177e4SLinus Torvalds hose = pci_isa_hose; 671da177e4SLinus Torvalds else 681da177e4SLinus Torvalds return -ENODEV; 691da177e4SLinus Torvalds } 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds switch (which & ~IOBASE_FROM_HOSE) { 721da177e4SLinus Torvalds case IOBASE_HOSE: 731da177e4SLinus Torvalds return hose->index; 741da177e4SLinus Torvalds case IOBASE_SPARSE_MEM: 751da177e4SLinus Torvalds return hose->sparse_mem_base; 761da177e4SLinus Torvalds case IOBASE_DENSE_MEM: 771da177e4SLinus Torvalds return hose->dense_mem_base; 781da177e4SLinus Torvalds case IOBASE_SPARSE_IO: 791da177e4SLinus Torvalds return hose->sparse_io_base; 801da177e4SLinus Torvalds case IOBASE_DENSE_IO: 811da177e4SLinus Torvalds return hose->dense_io_base; 821da177e4SLinus Torvalds case IOBASE_ROOT_BUS: 831da177e4SLinus Torvalds return hose->bus->number; 841da177e4SLinus Torvalds } 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds return -EOPNOTSUPP; 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds asmlinkage long 901da177e4SLinus Torvalds sys_pciconfig_read(unsigned long bus, unsigned long dfn, 911da177e4SLinus Torvalds unsigned long off, unsigned long len, void *buf) 921da177e4SLinus Torvalds { 931da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 941da177e4SLinus Torvalds return -EPERM; 951da177e4SLinus Torvalds else 961da177e4SLinus Torvalds return -ENODEV; 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds asmlinkage long 1001da177e4SLinus Torvalds sys_pciconfig_write(unsigned long bus, unsigned long dfn, 1011da177e4SLinus Torvalds unsigned long off, unsigned long len, void *buf) 1021da177e4SLinus Torvalds { 1031da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 1041da177e4SLinus Torvalds return -EPERM; 1051da177e4SLinus Torvalds else 1061da177e4SLinus Torvalds return -ENODEV; 1071da177e4SLinus Torvalds } 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds /* Stubs for the routines in pci_iommu.c: */ 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds void * 1121da177e4SLinus Torvalds pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp) 1131da177e4SLinus Torvalds { 1141da177e4SLinus Torvalds return NULL; 1151da177e4SLinus Torvalds } 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds void 1181da177e4SLinus Torvalds pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr, 1191da177e4SLinus Torvalds dma_addr_t dma_addr) 1201da177e4SLinus Torvalds { 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds dma_addr_t 1241da177e4SLinus Torvalds pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size, 1251da177e4SLinus Torvalds int direction) 1261da177e4SLinus Torvalds { 1271da177e4SLinus Torvalds return (dma_addr_t) 0; 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds void 1311da177e4SLinus Torvalds pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, 1321da177e4SLinus Torvalds int direction) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds } 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds int 1371da177e4SLinus Torvalds pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, 1381da177e4SLinus Torvalds int direction) 1391da177e4SLinus Torvalds { 1401da177e4SLinus Torvalds return 0; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds void 1441da177e4SLinus Torvalds pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, 1451da177e4SLinus Torvalds int direction) 1461da177e4SLinus Torvalds { 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds int 1501da177e4SLinus Torvalds pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask) 1511da177e4SLinus Torvalds { 1521da177e4SLinus Torvalds return 0; 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds /* Generic DMA mapping functions: */ 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds void * 1581da177e4SLinus Torvalds dma_alloc_coherent(struct device *dev, size_t size, 15955c5d74bSAl Viro dma_addr_t *dma_handle, gfp_t gfp) 1601da177e4SLinus Torvalds { 1611da177e4SLinus Torvalds void *ret; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds if (!dev || *dev->dma_mask >= 0xffffffffUL) 1641da177e4SLinus Torvalds gfp &= ~GFP_DMA; 1651da177e4SLinus Torvalds ret = (void *)__get_free_pages(gfp, get_order(size)); 1661da177e4SLinus Torvalds if (ret) { 1671da177e4SLinus Torvalds memset(ret, 0, size); 1681da177e4SLinus Torvalds *dma_handle = virt_to_bus(ret); 1691da177e4SLinus Torvalds } 1701da177e4SLinus Torvalds return ret; 1711da177e4SLinus Torvalds } 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds EXPORT_SYMBOL(dma_alloc_coherent); 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds int 1768c8d7214SFUJITA Tomonori dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents, 1771da177e4SLinus Torvalds enum dma_data_direction direction) 1781da177e4SLinus Torvalds { 1791da177e4SLinus Torvalds int i; 1808c8d7214SFUJITA Tomonori struct scatterlist *sg; 1811da177e4SLinus Torvalds 1828c8d7214SFUJITA Tomonori for_each_sg(sgl, sg, nents, i) { 1831da177e4SLinus Torvalds void *va; 1841da177e4SLinus Torvalds 1858c8d7214SFUJITA Tomonori BUG_ON(!sg_page(sg)); 1868c8d7214SFUJITA Tomonori va = sg_virt(sg); 1878c8d7214SFUJITA Tomonori sg_dma_address(sg) = (dma_addr_t)virt_to_bus(va); 1888c8d7214SFUJITA Tomonori sg_dma_len(sg) = sg->length; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds return nents; 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds EXPORT_SYMBOL(dma_map_sg); 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds int 1971da177e4SLinus Torvalds dma_set_mask(struct device *dev, u64 mask) 1981da177e4SLinus Torvalds { 1991da177e4SLinus Torvalds if (!dev->dma_mask || !dma_supported(dev, mask)) 2001da177e4SLinus Torvalds return -EIO; 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds *dev->dma_mask = mask; 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds return 0; 2051da177e4SLinus Torvalds } 206cff52dafSAl Viro EXPORT_SYMBOL(dma_set_mask); 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) 2091da177e4SLinus Torvalds { 2101da177e4SLinus Torvalds return NULL; 2111da177e4SLinus Torvalds } 2121da177e4SLinus Torvalds 2131da177e4SLinus Torvalds void pci_iounmap(struct pci_dev *dev, void __iomem * addr) 2141da177e4SLinus Torvalds { 2151da177e4SLinus Torvalds } 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds EXPORT_SYMBOL(pci_iomap); 2181da177e4SLinus Torvalds EXPORT_SYMBOL(pci_iounmap); 219