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
alpha_core_agp_vm_fault(struct vm_fault * vmf)148fb8876bSSouptick Joarder static vm_fault_t alpha_core_agp_vm_fault(struct vm_fault *vmf)
151da177e4SLinus Torvalds {
161da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data;
171da177e4SLinus Torvalds dma_addr_t dma_addr;
181da177e4SLinus Torvalds unsigned long pa;
191da177e4SLinus Torvalds struct page *page;
201da177e4SLinus Torvalds
2111bac800SDave Jiang dma_addr = vmf->address - vmf->vma->vm_start + agp->aperture.bus_base;
221da177e4SLinus Torvalds pa = agp->ops->translate(agp, dma_addr);
231da177e4SLinus Torvalds
246a92a4e0SDave Jones if (pa == (unsigned long)-EINVAL)
256d6f8d52SNick Piggin return VM_FAULT_SIGBUS; /* no translation */
261da177e4SLinus Torvalds
271da177e4SLinus Torvalds /*
281da177e4SLinus Torvalds * Get the page, inc the use count, and return it
291da177e4SLinus Torvalds */
301da177e4SLinus Torvalds page = virt_to_page(__va(pa));
311da177e4SLinus Torvalds get_page(page);
326d6f8d52SNick Piggin vmf->page = page;
336d6f8d52SNick Piggin return 0;
341da177e4SLinus Torvalds }
351da177e4SLinus Torvalds
361da177e4SLinus Torvalds static struct aper_size_info_fixed alpha_core_agp_sizes[] =
371da177e4SLinus Torvalds {
381da177e4SLinus Torvalds { 0, 0, 0 }, /* filled in by alpha_core_agp_setup */
391da177e4SLinus Torvalds };
401da177e4SLinus Torvalds
41f0f37e2fSAlexey Dobriyan static const struct vm_operations_struct alpha_core_agp_vm_ops = {
426d6f8d52SNick Piggin .fault = alpha_core_agp_vm_fault,
431da177e4SLinus Torvalds };
441da177e4SLinus Torvalds
451da177e4SLinus Torvalds
alpha_core_agp_fetch_size(void)461da177e4SLinus Torvalds static int alpha_core_agp_fetch_size(void)
471da177e4SLinus Torvalds {
481da177e4SLinus Torvalds return alpha_core_agp_sizes[0].size;
491da177e4SLinus Torvalds }
501da177e4SLinus Torvalds
alpha_core_agp_configure(void)511da177e4SLinus Torvalds static int alpha_core_agp_configure(void)
521da177e4SLinus Torvalds {
531da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data;
541da177e4SLinus Torvalds agp_bridge->gart_bus_addr = agp->aperture.bus_base;
551da177e4SLinus Torvalds return 0;
561da177e4SLinus Torvalds }
571da177e4SLinus Torvalds
alpha_core_agp_cleanup(void)581da177e4SLinus Torvalds static void alpha_core_agp_cleanup(void)
591da177e4SLinus Torvalds {
601da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data;
611da177e4SLinus Torvalds
621da177e4SLinus Torvalds agp->ops->cleanup(agp);
631da177e4SLinus Torvalds }
641da177e4SLinus Torvalds
alpha_core_agp_tlbflush(struct agp_memory * mem)651da177e4SLinus Torvalds static void alpha_core_agp_tlbflush(struct agp_memory *mem)
661da177e4SLinus Torvalds {
671da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data;
681da177e4SLinus Torvalds alpha_mv.mv_pci_tbi(agp->hose, 0, -1);
691da177e4SLinus Torvalds }
701da177e4SLinus Torvalds
alpha_core_agp_enable(struct agp_bridge_data * bridge,u32 mode)711da177e4SLinus Torvalds static void alpha_core_agp_enable(struct agp_bridge_data *bridge, u32 mode)
721da177e4SLinus Torvalds {
731da177e4SLinus Torvalds alpha_agp_info *agp = bridge->dev_private_data;
741da177e4SLinus Torvalds
751da177e4SLinus Torvalds agp->mode.lw = agp_collect_device_status(bridge, mode,
761da177e4SLinus Torvalds agp->capability.lw);
771da177e4SLinus Torvalds
781da177e4SLinus Torvalds agp->mode.bits.enable = 1;
791da177e4SLinus Torvalds agp->ops->configure(agp);
801da177e4SLinus Torvalds
81c7258012SJoe Perches agp_device_command(agp->mode.lw, false);
821da177e4SLinus Torvalds }
831da177e4SLinus Torvalds
alpha_core_agp_insert_memory(struct agp_memory * mem,off_t pg_start,int type)841da177e4SLinus Torvalds static int alpha_core_agp_insert_memory(struct agp_memory *mem, off_t pg_start,
851da177e4SLinus Torvalds int type)
861da177e4SLinus Torvalds {
871da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data;
881da177e4SLinus Torvalds int num_entries, status;
891da177e4SLinus Torvalds void *temp;
901da177e4SLinus Torvalds
91a030ce44SThomas Hellstrom if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES)
92a030ce44SThomas Hellstrom return -EINVAL;
93a030ce44SThomas Hellstrom
941da177e4SLinus Torvalds temp = agp_bridge->current_size;
951da177e4SLinus Torvalds num_entries = A_SIZE_FIX(temp)->num_entries;
966a92a4e0SDave Jones if ((pg_start + mem->page_count) > num_entries)
976a92a4e0SDave Jones return -EINVAL;
981da177e4SLinus Torvalds
991da177e4SLinus Torvalds status = agp->ops->bind(agp, pg_start, mem);
1001da177e4SLinus Torvalds mb();
1011da177e4SLinus Torvalds alpha_core_agp_tlbflush(mem);
1021da177e4SLinus Torvalds
1031da177e4SLinus Torvalds return status;
1041da177e4SLinus Torvalds }
1051da177e4SLinus Torvalds
alpha_core_agp_remove_memory(struct agp_memory * mem,off_t pg_start,int type)1061da177e4SLinus Torvalds static int alpha_core_agp_remove_memory(struct agp_memory *mem, off_t pg_start,
1071da177e4SLinus Torvalds int type)
1081da177e4SLinus Torvalds {
1091da177e4SLinus Torvalds alpha_agp_info *agp = agp_bridge->dev_private_data;
1101da177e4SLinus Torvalds int status;
1111da177e4SLinus Torvalds
1121da177e4SLinus Torvalds status = agp->ops->unbind(agp, pg_start, mem);
1131da177e4SLinus Torvalds alpha_core_agp_tlbflush(mem);
1141da177e4SLinus Torvalds return status;
1151da177e4SLinus Torvalds }
1161da177e4SLinus Torvalds
alpha_core_agp_create_free_gatt_table(struct agp_bridge_data * a)11781c24669SAndrew Morton static int alpha_core_agp_create_free_gatt_table(struct agp_bridge_data *a)
11881c24669SAndrew Morton {
11981c24669SAndrew Morton return 0;
12081c24669SAndrew Morton }
12181c24669SAndrew Morton
1221da177e4SLinus Torvalds struct agp_bridge_driver alpha_core_agp_driver = {
1231da177e4SLinus Torvalds .owner = THIS_MODULE,
1241da177e4SLinus Torvalds .aperture_sizes = alpha_core_agp_sizes,
1251da177e4SLinus Torvalds .num_aperture_sizes = 1,
1261da177e4SLinus Torvalds .size_type = FIXED_APER_SIZE,
127c7258012SJoe Perches .cant_use_aperture = true,
1281da177e4SLinus Torvalds .masks = NULL,
1291da177e4SLinus Torvalds
1301da177e4SLinus Torvalds .fetch_size = alpha_core_agp_fetch_size,
1311da177e4SLinus Torvalds .configure = alpha_core_agp_configure,
1321da177e4SLinus Torvalds .agp_enable = alpha_core_agp_enable,
1331da177e4SLinus Torvalds .cleanup = alpha_core_agp_cleanup,
1341da177e4SLinus Torvalds .tlb_flush = alpha_core_agp_tlbflush,
1351da177e4SLinus Torvalds .mask_memory = agp_generic_mask_memory,
1361da177e4SLinus Torvalds .cache_flush = global_cache_flush,
13781c24669SAndrew Morton .create_gatt_table = alpha_core_agp_create_free_gatt_table,
13881c24669SAndrew Morton .free_gatt_table = alpha_core_agp_create_free_gatt_table,
1391da177e4SLinus Torvalds .insert_memory = alpha_core_agp_insert_memory,
1401da177e4SLinus Torvalds .remove_memory = alpha_core_agp_remove_memory,
1411da177e4SLinus Torvalds .alloc_by_type = agp_generic_alloc_by_type,
1421da177e4SLinus Torvalds .free_by_type = agp_generic_free_by_type,
1431da177e4SLinus Torvalds .agp_alloc_page = agp_generic_alloc_page,
1445f310b63SRene Herman .agp_alloc_pages = agp_generic_alloc_pages,
1451da177e4SLinus Torvalds .agp_destroy_page = agp_generic_destroy_page,
1465f310b63SRene Herman .agp_destroy_pages = agp_generic_destroy_pages,
147a030ce44SThomas Hellstrom .agp_type_to_mask_type = agp_generic_type_to_mask_type,
1481da177e4SLinus Torvalds };
1491da177e4SLinus Torvalds
1501da177e4SLinus Torvalds struct agp_bridge_data *alpha_bridge;
1511da177e4SLinus Torvalds
1521da177e4SLinus Torvalds int __init
alpha_core_agp_setup(void)1531da177e4SLinus Torvalds alpha_core_agp_setup(void)
1541da177e4SLinus Torvalds {
1551da177e4SLinus Torvalds alpha_agp_info *agp = alpha_mv.agp_info();
1561da177e4SLinus Torvalds struct pci_dev *pdev; /* faked */
1571da177e4SLinus Torvalds struct aper_size_info_fixed *aper_size;
1581da177e4SLinus Torvalds
1591da177e4SLinus Torvalds if (!agp)
1601da177e4SLinus Torvalds return -ENODEV;
1611da177e4SLinus Torvalds if (agp->ops->setup(agp))
1621da177e4SLinus Torvalds return -ENODEV;
1631da177e4SLinus Torvalds
1641da177e4SLinus Torvalds /*
1651da177e4SLinus Torvalds * Build the aperture size descriptor
1661da177e4SLinus Torvalds */
1671da177e4SLinus Torvalds aper_size = alpha_core_agp_sizes;
1681da177e4SLinus Torvalds aper_size->size = agp->aperture.size / (1024 * 1024);
1691da177e4SLinus Torvalds aper_size->num_entries = agp->aperture.size / PAGE_SIZE;
1701da177e4SLinus Torvalds aper_size->page_order = __ffs(aper_size->num_entries / 1024);
1711da177e4SLinus Torvalds
1721da177e4SLinus Torvalds /*
1731da177e4SLinus Torvalds * Build a fake pci_dev struct
1741da177e4SLinus Torvalds */
1758b1fce04SGu Zheng pdev = pci_alloc_dev(NULL);
1761da177e4SLinus Torvalds if (!pdev)
1771da177e4SLinus Torvalds return -ENOMEM;
1781da177e4SLinus Torvalds pdev->vendor = 0xffff;
1791da177e4SLinus Torvalds pdev->device = 0xffff;
1801da177e4SLinus Torvalds pdev->sysdata = agp->hose;
1811da177e4SLinus Torvalds
1821da177e4SLinus Torvalds alpha_bridge = agp_alloc_bridge();
1831da177e4SLinus Torvalds if (!alpha_bridge)
1841da177e4SLinus Torvalds goto fail;
1851da177e4SLinus Torvalds
1861da177e4SLinus Torvalds alpha_bridge->driver = &alpha_core_agp_driver;
1871da177e4SLinus Torvalds alpha_bridge->vm_ops = &alpha_core_agp_vm_ops;
1881da177e4SLinus Torvalds alpha_bridge->current_size = aper_size; /* only 1 size */
1891da177e4SLinus Torvalds alpha_bridge->dev_private_data = agp;
1901da177e4SLinus Torvalds alpha_bridge->dev = pdev;
1911da177e4SLinus Torvalds alpha_bridge->mode = agp->capability.lw;
1921da177e4SLinus Torvalds
1931da177e4SLinus Torvalds printk(KERN_INFO PFX "Detected AGP on hose %d\n", agp->hose->index);
1941da177e4SLinus Torvalds return agp_add_bridge(alpha_bridge);
1951da177e4SLinus Torvalds
1961da177e4SLinus Torvalds fail:
1971da177e4SLinus Torvalds kfree(pdev);
1981da177e4SLinus Torvalds return -ENOMEM;
1991da177e4SLinus Torvalds }
2001da177e4SLinus Torvalds
agp_alpha_core_init(void)2011da177e4SLinus Torvalds static int __init agp_alpha_core_init(void)
2021da177e4SLinus Torvalds {
2031da177e4SLinus Torvalds if (agp_off)
2041da177e4SLinus Torvalds return -EINVAL;
2051da177e4SLinus Torvalds if (alpha_mv.agp_info)
2061da177e4SLinus Torvalds return alpha_core_agp_setup();
2071da177e4SLinus Torvalds return -ENODEV;
2081da177e4SLinus Torvalds }
2091da177e4SLinus Torvalds
agp_alpha_core_cleanup(void)2101da177e4SLinus Torvalds static void __exit agp_alpha_core_cleanup(void)
2111da177e4SLinus Torvalds {
2121da177e4SLinus Torvalds agp_remove_bridge(alpha_bridge);
2131da177e4SLinus Torvalds agp_put_bridge(alpha_bridge);
2141da177e4SLinus Torvalds }
2151da177e4SLinus Torvalds
2161da177e4SLinus Torvalds module_init(agp_alpha_core_init);
2171da177e4SLinus Torvalds module_exit(agp_alpha_core_cleanup);
2181da177e4SLinus Torvalds
2191da177e4SLinus Torvalds MODULE_AUTHOR("Jeff Wiedemeier <Jeff.Wiedemeier@hp.com>");
2201da177e4SLinus Torvalds MODULE_LICENSE("GPL and additional rights");
221