2005-04-16 18:20:36 -04:00
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/agp_backend.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <asm/machvec.h>
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#include <asm/agp_backend.h>
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#include "../../../arch/alpha/kernel/pci_impl.h"
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#include "agp.h"
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static struct page *alpha_core_agp_vm_nopage(struct vm_area_struct *vma,
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unsigned long address,
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int *type)
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{
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alpha_agp_info *agp = agp_bridge->dev_private_data;
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dma_addr_t dma_addr;
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unsigned long pa;
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struct page *page;
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dma_addr = address - vma->vm_start + agp->aperture.bus_base;
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pa = agp->ops->translate(agp, dma_addr);
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2006-02-28 00:54:25 -05:00
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if (pa == (unsigned long)-EINVAL)
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return NULL; /* no translation */
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2005-04-16 18:20:36 -04:00
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/*
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* Get the page, inc the use count, and return it
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*/
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page = virt_to_page(__va(pa));
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get_page(page);
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if (type)
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*type = VM_FAULT_MINOR;
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return page;
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}
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static struct aper_size_info_fixed alpha_core_agp_sizes[] =
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{
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{ 0, 0, 0 }, /* filled in by alpha_core_agp_setup */
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};
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struct vm_operations_struct alpha_core_agp_vm_ops = {
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.nopage = alpha_core_agp_vm_nopage,
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};
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static int alpha_core_agp_fetch_size(void)
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{
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return alpha_core_agp_sizes[0].size;
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}
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static int alpha_core_agp_configure(void)
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{
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alpha_agp_info *agp = agp_bridge->dev_private_data;
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agp_bridge->gart_bus_addr = agp->aperture.bus_base;
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return 0;
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}
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static void alpha_core_agp_cleanup(void)
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{
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alpha_agp_info *agp = agp_bridge->dev_private_data;
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agp->ops->cleanup(agp);
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}
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static void alpha_core_agp_tlbflush(struct agp_memory *mem)
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{
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alpha_agp_info *agp = agp_bridge->dev_private_data;
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alpha_mv.mv_pci_tbi(agp->hose, 0, -1);
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}
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static void alpha_core_agp_enable(struct agp_bridge_data *bridge, u32 mode)
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{
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alpha_agp_info *agp = bridge->dev_private_data;
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agp->mode.lw = agp_collect_device_status(bridge, mode,
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agp->capability.lw);
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agp->mode.bits.enable = 1;
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agp->ops->configure(agp);
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agp_device_command(agp->mode.lw, 0);
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}
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2006-02-28 00:54:25 -05:00
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static int alpha_core_agp_insert_memory(struct agp_memory *mem, off_t pg_start,
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2005-04-16 18:20:36 -04:00
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int type)
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{
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alpha_agp_info *agp = agp_bridge->dev_private_data;
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int num_entries, status;
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void *temp;
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2007-01-23 04:33:43 -05:00
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if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES)
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return -EINVAL;
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2005-04-16 18:20:36 -04:00
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temp = agp_bridge->current_size;
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num_entries = A_SIZE_FIX(temp)->num_entries;
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2006-02-28 00:54:25 -05:00
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if ((pg_start + mem->page_count) > num_entries)
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return -EINVAL;
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2005-04-16 18:20:36 -04:00
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status = agp->ops->bind(agp, pg_start, mem);
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mb();
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alpha_core_agp_tlbflush(mem);
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return status;
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}
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2006-02-28 00:54:25 -05:00
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static int alpha_core_agp_remove_memory(struct agp_memory *mem, off_t pg_start,
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2005-04-16 18:20:36 -04:00
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int type)
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{
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alpha_agp_info *agp = agp_bridge->dev_private_data;
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int status;
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status = agp->ops->unbind(agp, pg_start, mem);
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alpha_core_agp_tlbflush(mem);
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return status;
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}
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2006-06-01 23:19:36 -04:00
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static int alpha_core_agp_create_free_gatt_table(struct agp_bridge_data *a)
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{
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return 0;
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}
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2005-04-16 18:20:36 -04:00
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struct agp_bridge_driver alpha_core_agp_driver = {
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.owner = THIS_MODULE,
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.aperture_sizes = alpha_core_agp_sizes,
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.num_aperture_sizes = 1,
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.size_type = FIXED_APER_SIZE,
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.cant_use_aperture = 1,
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.masks = NULL,
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2006-02-28 00:54:25 -05:00
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2005-04-16 18:20:36 -04:00
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.fetch_size = alpha_core_agp_fetch_size,
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.configure = alpha_core_agp_configure,
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.agp_enable = alpha_core_agp_enable,
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.cleanup = alpha_core_agp_cleanup,
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.tlb_flush = alpha_core_agp_tlbflush,
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.mask_memory = agp_generic_mask_memory,
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.cache_flush = global_cache_flush,
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2006-06-01 23:19:36 -04:00
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.create_gatt_table = alpha_core_agp_create_free_gatt_table,
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.free_gatt_table = alpha_core_agp_create_free_gatt_table,
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2005-04-16 18:20:36 -04:00
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.insert_memory = alpha_core_agp_insert_memory,
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.remove_memory = alpha_core_agp_remove_memory,
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.alloc_by_type = agp_generic_alloc_by_type,
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.free_by_type = agp_generic_free_by_type,
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.agp_alloc_page = agp_generic_alloc_page,
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.agp_destroy_page = agp_generic_destroy_page,
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2007-01-23 04:33:43 -05:00
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.agp_type_to_mask_type = agp_generic_type_to_mask_type,
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2005-04-16 18:20:36 -04:00
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};
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struct agp_bridge_data *alpha_bridge;
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int __init
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alpha_core_agp_setup(void)
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{
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alpha_agp_info *agp = alpha_mv.agp_info();
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struct pci_dev *pdev; /* faked */
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struct aper_size_info_fixed *aper_size;
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if (!agp)
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return -ENODEV;
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if (agp->ops->setup(agp))
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return -ENODEV;
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/*
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* Build the aperture size descriptor
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*/
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aper_size = alpha_core_agp_sizes;
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aper_size->size = agp->aperture.size / (1024 * 1024);
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aper_size->num_entries = agp->aperture.size / PAGE_SIZE;
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aper_size->page_order = __ffs(aper_size->num_entries / 1024);
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/*
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* Build a fake pci_dev struct
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*/
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2007-04-05 03:19:09 -04:00
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pdev = alloc_pci_dev();
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2005-04-16 18:20:36 -04:00
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if (!pdev)
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return -ENOMEM;
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pdev->vendor = 0xffff;
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pdev->device = 0xffff;
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pdev->sysdata = agp->hose;
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alpha_bridge = agp_alloc_bridge();
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if (!alpha_bridge)
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goto fail;
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alpha_bridge->driver = &alpha_core_agp_driver;
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alpha_bridge->vm_ops = &alpha_core_agp_vm_ops;
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alpha_bridge->current_size = aper_size; /* only 1 size */
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alpha_bridge->dev_private_data = agp;
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alpha_bridge->dev = pdev;
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alpha_bridge->mode = agp->capability.lw;
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printk(KERN_INFO PFX "Detected AGP on hose %d\n", agp->hose->index);
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return agp_add_bridge(alpha_bridge);
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fail:
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kfree(pdev);
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return -ENOMEM;
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}
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static int __init agp_alpha_core_init(void)
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{
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if (agp_off)
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return -EINVAL;
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if (alpha_mv.agp_info)
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return alpha_core_agp_setup();
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return -ENODEV;
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}
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static void __exit agp_alpha_core_cleanup(void)
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{
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agp_remove_bridge(alpha_bridge);
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agp_put_bridge(alpha_bridge);
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}
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module_init(agp_alpha_core_init);
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module_exit(agp_alpha_core_cleanup);
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MODULE_AUTHOR("Jeff Wiedemeier <Jeff.Wiedemeier@hp.com>");
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MODULE_LICENSE("GPL and additional rights");
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