#include <linux/module.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/agp_backend.h> #include <linux/mm.h> #include <linux/slab.h> #include <asm/machvec.h> #include <asm/agp_backend.h> #include "../../../arch/alpha/kernel/pci_impl.h" #include "agp.h" static int alpha_core_agp_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { alpha_agp_info *agp = agp_bridge->dev_private_data; dma_addr_t dma_addr; unsigned long pa; struct page *page; dma_addr = (unsigned long)vmf->virtual_address - vma->vm_start + agp->aperture.bus_base; pa = agp->ops->translate(agp, dma_addr); if (pa == (unsigned long)-EINVAL) return VM_FAULT_SIGBUS; /* no translation */ /* * Get the page, inc the use count, and return it */ page = virt_to_page(__va(pa)); get_page(page); vmf->page = page; return 0; } static struct aper_size_info_fixed alpha_core_agp_sizes[] = { { 0, 0, 0 }, /* filled in by alpha_core_agp_setup */ }; struct vm_operations_struct alpha_core_agp_vm_ops = { .fault = alpha_core_agp_vm_fault, }; static int alpha_core_agp_fetch_size(void) { return alpha_core_agp_sizes[0].size; } static int alpha_core_agp_configure(void) { alpha_agp_info *agp = agp_bridge->dev_private_data; agp_bridge->gart_bus_addr = agp->aperture.bus_base; return 0; } static void alpha_core_agp_cleanup(void) { alpha_agp_info *agp = agp_bridge->dev_private_data; agp->ops->cleanup(agp); } static void alpha_core_agp_tlbflush(struct agp_memory *mem) { alpha_agp_info *agp = agp_bridge->dev_private_data; alpha_mv.mv_pci_tbi(agp->hose, 0, -1); } static void alpha_core_agp_enable(struct agp_bridge_data *bridge, u32 mode) { alpha_agp_info *agp = bridge->dev_private_data; agp->mode.lw = agp_collect_device_status(bridge, mode, agp->capability.lw); agp->mode.bits.enable = 1; agp->ops->configure(agp); agp_device_command(agp->mode.lw, false); } static int alpha_core_agp_insert_memory(struct agp_memory *mem, off_t pg_start, int type) { alpha_agp_info *agp = agp_bridge->dev_private_data; int num_entries, status; void *temp; if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES) return -EINVAL; temp = agp_bridge->current_size; num_entries = A_SIZE_FIX(temp)->num_entries; if ((pg_start + mem->page_count) > num_entries) return -EINVAL; status = agp->ops->bind(agp, pg_start, mem); mb(); alpha_core_agp_tlbflush(mem); return status; } static int alpha_core_agp_remove_memory(struct agp_memory *mem, off_t pg_start, int type) { alpha_agp_info *agp = agp_bridge->dev_private_data; int status; status = agp->ops->unbind(agp, pg_start, mem); alpha_core_agp_tlbflush(mem); return status; } static int alpha_core_agp_create_free_gatt_table(struct agp_bridge_data *a) { return 0; } struct agp_bridge_driver alpha_core_agp_driver = { .owner = THIS_MODULE, .aperture_sizes = alpha_core_agp_sizes, .num_aperture_sizes = 1, .size_type = FIXED_APER_SIZE, .cant_use_aperture = true, .masks = NULL, .fetch_size = alpha_core_agp_fetch_size, .configure = alpha_core_agp_configure, .agp_enable = alpha_core_agp_enable, .cleanup = alpha_core_agp_cleanup, .tlb_flush = alpha_core_agp_tlbflush, .mask_memory = agp_generic_mask_memory, .cache_flush = global_cache_flush, .create_gatt_table = alpha_core_agp_create_free_gatt_table, .free_gatt_table = alpha_core_agp_create_free_gatt_table, .insert_memory = alpha_core_agp_insert_memory, .remove_memory = alpha_core_agp_remove_memory, .alloc_by_type = agp_generic_alloc_by_type, .free_by_type = agp_generic_free_by_type, .agp_alloc_page = agp_generic_alloc_page, .agp_alloc_pages = agp_generic_alloc_pages, .agp_destroy_page = agp_generic_destroy_page, .agp_destroy_pages = agp_generic_destroy_pages, .agp_type_to_mask_type = agp_generic_type_to_mask_type, }; struct agp_bridge_data *alpha_bridge; int __init alpha_core_agp_setup(void) { alpha_agp_info *agp = alpha_mv.agp_info(); struct pci_dev *pdev; /* faked */ struct aper_size_info_fixed *aper_size; if (!agp) return -ENODEV; if (agp->ops->setup(agp)) return -ENODEV; /* * Build the aperture size descriptor */ aper_size = alpha_core_agp_sizes; aper_size->size = agp->aperture.size / (1024 * 1024); aper_size->num_entries = agp->aperture.size / PAGE_SIZE; aper_size->page_order = __ffs(aper_size->num_entries / 1024); /* * Build a fake pci_dev struct */ pdev = alloc_pci_dev(); if (!pdev) return -ENOMEM; pdev->vendor = 0xffff; pdev->device = 0xffff; pdev->sysdata = agp->hose; alpha_bridge = agp_alloc_bridge(); if (!alpha_bridge) goto fail; alpha_bridge->driver = &alpha_core_agp_driver; alpha_bridge->vm_ops = &alpha_core_agp_vm_ops; alpha_bridge->current_size = aper_size; /* only 1 size */ alpha_bridge->dev_private_data = agp; alpha_bridge->dev = pdev; alpha_bridge->mode = agp->capability.lw; printk(KERN_INFO PFX "Detected AGP on hose %d\n", agp->hose->index); return agp_add_bridge(alpha_bridge); fail: kfree(pdev); return -ENOMEM; } static int __init agp_alpha_core_init(void) { if (agp_off) return -EINVAL; if (alpha_mv.agp_info) return alpha_core_agp_setup(); return -ENODEV; } static void __exit agp_alpha_core_cleanup(void) { agp_remove_bridge(alpha_bridge); agp_put_bridge(alpha_bridge); } module_init(agp_alpha_core_init); module_exit(agp_alpha_core_cleanup); MODULE_AUTHOR("Jeff Wiedemeier <Jeff.Wiedemeier@hp.com>"); MODULE_LICENSE("GPL and additional rights");