11da177e4SLinus Torvalds #include <linux/module.h> 21da177e4SLinus Torvalds #include <linux/pci.h> 31da177e4SLinus Torvalds #include <linux/init.h> 41da177e4SLinus Torvalds #include <linux/agp_backend.h> 51da177e4SLinus Torvalds #include <linux/mm.h> 61da177e4SLinus Torvalds #include <linux/slab.h> 71da177e4SLinus Torvalds 81da177e4SLinus Torvalds #include <asm/machvec.h> 91da177e4SLinus Torvalds #include <asm/agp_backend.h> 101da177e4SLinus Torvalds #include "../../../arch/alpha/kernel/pci_impl.h" 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include "agp.h" 131da177e4SLinus Torvalds 146d6f8d52SNick Piggin static int alpha_core_agp_vm_fault(struct vm_area_struct *vma, 156d6f8d52SNick Piggin struct vm_fault *vmf) 161da177e4SLinus Torvalds { 171da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data; 181da177e4SLinus Torvalds dma_addr_t dma_addr; 191da177e4SLinus Torvalds unsigned long pa; 201da177e4SLinus Torvalds struct page *page; 211da177e4SLinus Torvalds 226d6f8d52SNick Piggin dma_addr = (unsigned long)vmf->virtual_address - vma->vm_start 236d6f8d52SNick Piggin + agp->aperture.bus_base; 241da177e4SLinus Torvalds pa = agp->ops->translate(agp, dma_addr); 251da177e4SLinus Torvalds 266a92a4e0SDave Jones if (pa == (unsigned long)-EINVAL) 276d6f8d52SNick Piggin return VM_FAULT_SIGBUS; /* no translation */ 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds /* 301da177e4SLinus Torvalds * Get the page, inc the use count, and return it 311da177e4SLinus Torvalds */ 321da177e4SLinus Torvalds page = virt_to_page(__va(pa)); 331da177e4SLinus Torvalds get_page(page); 346d6f8d52SNick Piggin vmf->page = page; 356d6f8d52SNick Piggin return 0; 361da177e4SLinus Torvalds } 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds static struct aper_size_info_fixed alpha_core_agp_sizes[] = 391da177e4SLinus Torvalds { 401da177e4SLinus Torvalds { 0, 0, 0 }, /* filled in by alpha_core_agp_setup */ 411da177e4SLinus Torvalds }; 421da177e4SLinus Torvalds 43f0f37e2fSAlexey Dobriyan static const struct vm_operations_struct alpha_core_agp_vm_ops = { 446d6f8d52SNick Piggin .fault = alpha_core_agp_vm_fault, 451da177e4SLinus Torvalds }; 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds static int alpha_core_agp_fetch_size(void) 491da177e4SLinus Torvalds { 501da177e4SLinus Torvalds return alpha_core_agp_sizes[0].size; 511da177e4SLinus Torvalds } 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds static int alpha_core_agp_configure(void) 541da177e4SLinus Torvalds { 551da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data; 561da177e4SLinus Torvalds agp_bridge->gart_bus_addr = agp->aperture.bus_base; 571da177e4SLinus Torvalds return 0; 581da177e4SLinus Torvalds } 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds static void alpha_core_agp_cleanup(void) 611da177e4SLinus Torvalds { 621da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data; 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds agp->ops->cleanup(agp); 651da177e4SLinus Torvalds } 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds static void alpha_core_agp_tlbflush(struct agp_memory *mem) 681da177e4SLinus Torvalds { 691da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data; 701da177e4SLinus Torvalds alpha_mv.mv_pci_tbi(agp->hose, 0, -1); 711da177e4SLinus Torvalds } 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds static void alpha_core_agp_enable(struct agp_bridge_data *bridge, u32 mode) 741da177e4SLinus Torvalds { 751da177e4SLinus Torvalds alpha_agp_info *agp = bridge->dev_private_data; 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds agp->mode.lw = agp_collect_device_status(bridge, mode, 781da177e4SLinus Torvalds agp->capability.lw); 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds agp->mode.bits.enable = 1; 811da177e4SLinus Torvalds agp->ops->configure(agp); 821da177e4SLinus Torvalds 83c7258012SJoe Perches agp_device_command(agp->mode.lw, false); 841da177e4SLinus Torvalds } 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds static int alpha_core_agp_insert_memory(struct agp_memory *mem, off_t pg_start, 871da177e4SLinus Torvalds int type) 881da177e4SLinus Torvalds { 891da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data; 901da177e4SLinus Torvalds int num_entries, status; 911da177e4SLinus Torvalds void *temp; 921da177e4SLinus Torvalds 93a030ce44SThomas Hellstrom if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES) 94a030ce44SThomas Hellstrom return -EINVAL; 95a030ce44SThomas Hellstrom 961da177e4SLinus Torvalds temp = agp_bridge->current_size; 971da177e4SLinus Torvalds num_entries = A_SIZE_FIX(temp)->num_entries; 986a92a4e0SDave Jones if ((pg_start + mem->page_count) > num_entries) 996a92a4e0SDave Jones return -EINVAL; 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds status = agp->ops->bind(agp, pg_start, mem); 1021da177e4SLinus Torvalds mb(); 1031da177e4SLinus Torvalds alpha_core_agp_tlbflush(mem); 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds return status; 1061da177e4SLinus Torvalds } 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds static int alpha_core_agp_remove_memory(struct agp_memory *mem, off_t pg_start, 1091da177e4SLinus Torvalds int type) 1101da177e4SLinus Torvalds { 1111da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data; 1121da177e4SLinus Torvalds int status; 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds status = agp->ops->unbind(agp, pg_start, mem); 1151da177e4SLinus Torvalds alpha_core_agp_tlbflush(mem); 1161da177e4SLinus Torvalds return status; 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 11981c24669SAndrew Morton static int alpha_core_agp_create_free_gatt_table(struct agp_bridge_data *a) 12081c24669SAndrew Morton { 12181c24669SAndrew Morton return 0; 12281c24669SAndrew Morton } 12381c24669SAndrew Morton 1241da177e4SLinus Torvalds struct agp_bridge_driver alpha_core_agp_driver = { 1251da177e4SLinus Torvalds .owner = THIS_MODULE, 1261da177e4SLinus Torvalds .aperture_sizes = alpha_core_agp_sizes, 1271da177e4SLinus Torvalds .num_aperture_sizes = 1, 1281da177e4SLinus Torvalds .size_type = FIXED_APER_SIZE, 129c7258012SJoe Perches .cant_use_aperture = true, 1301da177e4SLinus Torvalds .masks = NULL, 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds .fetch_size = alpha_core_agp_fetch_size, 1331da177e4SLinus Torvalds .configure = alpha_core_agp_configure, 1341da177e4SLinus Torvalds .agp_enable = alpha_core_agp_enable, 1351da177e4SLinus Torvalds .cleanup = alpha_core_agp_cleanup, 1361da177e4SLinus Torvalds .tlb_flush = alpha_core_agp_tlbflush, 1371da177e4SLinus Torvalds .mask_memory = agp_generic_mask_memory, 1381da177e4SLinus Torvalds .cache_flush = global_cache_flush, 13981c24669SAndrew Morton .create_gatt_table = alpha_core_agp_create_free_gatt_table, 14081c24669SAndrew Morton .free_gatt_table = alpha_core_agp_create_free_gatt_table, 1411da177e4SLinus Torvalds .insert_memory = alpha_core_agp_insert_memory, 1421da177e4SLinus Torvalds .remove_memory = alpha_core_agp_remove_memory, 1431da177e4SLinus Torvalds .alloc_by_type = agp_generic_alloc_by_type, 1441da177e4SLinus Torvalds .free_by_type = agp_generic_free_by_type, 1451da177e4SLinus Torvalds .agp_alloc_page = agp_generic_alloc_page, 1465f310b63SRene Herman .agp_alloc_pages = agp_generic_alloc_pages, 1471da177e4SLinus Torvalds .agp_destroy_page = agp_generic_destroy_page, 1485f310b63SRene Herman .agp_destroy_pages = agp_generic_destroy_pages, 149a030ce44SThomas Hellstrom .agp_type_to_mask_type = agp_generic_type_to_mask_type, 1501da177e4SLinus Torvalds }; 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds struct agp_bridge_data *alpha_bridge; 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds int __init 1551da177e4SLinus Torvalds alpha_core_agp_setup(void) 1561da177e4SLinus Torvalds { 1571da177e4SLinus Torvalds alpha_agp_info *agp = alpha_mv.agp_info(); 1581da177e4SLinus Torvalds struct pci_dev *pdev; /* faked */ 1591da177e4SLinus Torvalds struct aper_size_info_fixed *aper_size; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds if (!agp) 1621da177e4SLinus Torvalds return -ENODEV; 1631da177e4SLinus Torvalds if (agp->ops->setup(agp)) 1641da177e4SLinus Torvalds return -ENODEV; 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds /* 1671da177e4SLinus Torvalds * Build the aperture size descriptor 1681da177e4SLinus Torvalds */ 1691da177e4SLinus Torvalds aper_size = alpha_core_agp_sizes; 1701da177e4SLinus Torvalds aper_size->size = agp->aperture.size / (1024 * 1024); 1711da177e4SLinus Torvalds aper_size->num_entries = agp->aperture.size / PAGE_SIZE; 1721da177e4SLinus Torvalds aper_size->page_order = __ffs(aper_size->num_entries / 1024); 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds /* 1751da177e4SLinus Torvalds * Build a fake pci_dev struct 1761da177e4SLinus Torvalds */ 177bab41e9bSMichael Ellerman pdev = alloc_pci_dev(); 1781da177e4SLinus Torvalds if (!pdev) 1791da177e4SLinus Torvalds return -ENOMEM; 1801da177e4SLinus Torvalds pdev->vendor = 0xffff; 1811da177e4SLinus Torvalds pdev->device = 0xffff; 1821da177e4SLinus Torvalds pdev->sysdata = agp->hose; 1831da177e4SLinus Torvalds 1841da177e4SLinus Torvalds alpha_bridge = agp_alloc_bridge(); 1851da177e4SLinus Torvalds if (!alpha_bridge) 1861da177e4SLinus Torvalds goto fail; 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds alpha_bridge->driver = &alpha_core_agp_driver; 1891da177e4SLinus Torvalds alpha_bridge->vm_ops = &alpha_core_agp_vm_ops; 1901da177e4SLinus Torvalds alpha_bridge->current_size = aper_size; /* only 1 size */ 1911da177e4SLinus Torvalds alpha_bridge->dev_private_data = agp; 1921da177e4SLinus Torvalds alpha_bridge->dev = pdev; 1931da177e4SLinus Torvalds alpha_bridge->mode = agp->capability.lw; 1941da177e4SLinus Torvalds 1951da177e4SLinus Torvalds printk(KERN_INFO PFX "Detected AGP on hose %d\n", agp->hose->index); 1961da177e4SLinus Torvalds return agp_add_bridge(alpha_bridge); 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds fail: 1991da177e4SLinus Torvalds kfree(pdev); 2001da177e4SLinus Torvalds return -ENOMEM; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds static int __init agp_alpha_core_init(void) 2041da177e4SLinus Torvalds { 2051da177e4SLinus Torvalds if (agp_off) 2061da177e4SLinus Torvalds return -EINVAL; 2071da177e4SLinus Torvalds if (alpha_mv.agp_info) 2081da177e4SLinus Torvalds return alpha_core_agp_setup(); 2091da177e4SLinus Torvalds return -ENODEV; 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds static void __exit agp_alpha_core_cleanup(void) 2131da177e4SLinus Torvalds { 2141da177e4SLinus Torvalds agp_remove_bridge(alpha_bridge); 2151da177e4SLinus Torvalds agp_put_bridge(alpha_bridge); 2161da177e4SLinus Torvalds } 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds module_init(agp_alpha_core_init); 2191da177e4SLinus Torvalds module_exit(agp_alpha_core_cleanup); 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds MODULE_AUTHOR("Jeff Wiedemeier <Jeff.Wiedemeier@hp.com>"); 2221da177e4SLinus Torvalds MODULE_LICENSE("GPL and additional rights"); 223