#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 struct page *alpha_core_agp_vm_nopage(struct vm_area_struct *vma, unsigned long address, int write_access) { alpha_agp_info *agp = agp_bridge->dev_private_data; dma_addr_t dma_addr; unsigned long pa; struct page *page; dma_addr = address - vma->vm_start + agp->aperture.bus_base; pa = agp->ops->translate(agp, dma_addr); if (pa == (unsigned long)-EINVAL) return NULL; /* no translation */ /* * Get the page, inc the use count, and return it */ page = virt_to_page(__va(pa)); get_page(page); return page; } static struct aper_size_info_fixed alpha_core_agp_sizes[] = { { 0, 0, 0 }, /* filled in by alpha_core_agp_setup */ }; static struct gatt_mask alpha_core_agp_masks[] = { { .mask = 0, .type = 0 }, }; struct vm_operations_struct alpha_core_agp_vm_ops = { .nopage = alpha_core_agp_vm_nopage, }; static int alpha_core_agp_nop(void) { /* just return success */ return 0; } 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(agp_memory *mem) { alpha_agp_info *agp = agp_bridge->dev_private_data; alpha_mv.mv_pci_tbi(agp->hose, 0, -1); } static unsigned long alpha_core_agp_mask_memory(unsigned long addr, int type) { /* Memory type is ignored */ return addr | agp_bridge->masks[0].mask; } static void alpha_core_agp_enable(u32 mode) { alpha_agp_info *agp = agp_bridge->dev_private_data; agp->mode.lw = agp_collect_device_status(mode, agp->capability.lw); agp->mode.bits.enable = 1; agp->ops->configure(agp); agp_device_command(agp->mode.lw, 0); } static int alpha_core_agp_insert_memory(agp_memory *mem, off_t pg_start, int type) { alpha_agp_info *agp = agp_bridge->dev_private_data; int num_entries, status; void *temp; 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(); agp_bridge->tlb_flush(mem); return status; } static int alpha_core_agp_remove_memory(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); agp_bridge->tlb_flush(mem); return status; } static struct agp_driver alpha_core_agp_driver = { .owner = THIS_MODULE, }; int __init alpha_core_agp_setup(void) { alpha_agp_info *agp = alpha_mv.agp_info(); 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; if (!aper_size) return -ENOMEM; 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) - 1; /* * Build a fake pci_dev struct */ if (!(agp_bridge->dev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL))) { return -ENOMEM; } agp_bridge->dev->vendor = 0xffff; agp_bridge->dev->device = 0xffff; agp_bridge->dev->sysdata = agp->hose; /* * Fill in the rest of the agp_bridge struct */ agp_bridge->masks = alpha_core_agp_masks; agp_bridge->aperture_sizes = aper_size; agp_bridge->current_size = aper_size; /* only one entry */ agp_bridge->size_type = FIXED_APER_SIZE; agp_bridge->num_aperture_sizes = 1; agp_bridge->dev_private_data = agp; agp_bridge->needs_scratch_page = FALSE; agp_bridge->configure = alpha_core_agp_configure; agp_bridge->fetch_size = alpha_core_agp_fetch_size; agp_bridge->cleanup = alpha_core_agp_cleanup; agp_bridge->tlb_flush = alpha_core_agp_tlbflush; agp_bridge->mask_memory = alpha_core_agp_mask_memory; agp_bridge->agp_enable = alpha_core_agp_enable; agp_bridge->cache_flush = global_cache_flush; agp_bridge->create_gatt_table = alpha_core_agp_nop; agp_bridge->free_gatt_table = alpha_core_agp_nop; agp_bridge->insert_memory = alpha_core_agp_insert_memory; agp_bridge->remove_memory = alpha_core_agp_remove_memory; agp_bridge->alloc_by_type = agp_generic_alloc_by_type; agp_bridge->free_by_type = agp_generic_free_by_type; agp_bridge->agp_alloc_page = agp_generic_alloc_page; agp_bridge->agp_destroy_page = agp_generic_destroy_page; agp_bridge->mode = agp->capability.lw; agp_bridge->cant_use_aperture = 1; agp_bridge->vm_ops = &alpha_core_agp_vm_ops; alpha_core_agp_driver.dev = agp_bridge->dev; agp_register_driver(&alpha_core_agp_driver); printk(KERN_INFO "Detected AGP on hose %d\n", agp->hose->index); return 0; } static int __init agp_alpha_core_init(void) { int ret_val = -ENODEV; if (alpha_mv.agp_info) { agp_bridge->type = ALPHA_CORE_AGP; ret_val = alpha_core_agp_setup(); } return ret_val; } static void __exit agp_alpha_core_cleanup(void) { agp_unregister_driver(&alpha_core_agp_driver); /* no pci driver for core */ } 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");