1071 lines
27 KiB
C
1071 lines
27 KiB
C
/*
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* AGPGART driver.
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* Copyright (C) 2002-2004 Dave Jones.
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* Copyright (C) 1999 Jeff Hartmann.
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* Copyright (C) 1999 Precision Insight, Inc.
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* Copyright (C) 1999 Xi Graphics, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* TODO:
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* - Allocate more than order 0 pages to avoid too much linear map splitting.
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*/
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#include <linux/config.h>
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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/pagemap.h>
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#include <linux/miscdevice.h>
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#include <linux/pm.h>
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#include <linux/agp_backend.h>
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#include <linux/vmalloc.h>
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#include <asm/io.h>
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#include "agp.h"
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__u32 *agp_gatt_table;
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int agp_memory_reserved;
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/*
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* Needed by the Nforce GART driver for the time being. Would be
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* nice to do this some other way instead of needing this export.
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*/
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EXPORT_SYMBOL_GPL(agp_memory_reserved);
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/*
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* Generic routines for handling agp_memory structures -
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* They use the basic page allocation routines to do the brunt of the work.
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*/
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void agp_free_key(int key)
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{
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if (key < 0)
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return;
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if (key < MAXKEY)
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clear_bit(key, agp_bridge->key_list);
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}
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EXPORT_SYMBOL(agp_free_key);
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static int agp_get_key(void)
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{
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int bit;
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bit = find_first_zero_bit(agp_bridge->key_list, MAXKEY);
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if (bit < MAXKEY) {
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set_bit(bit, agp_bridge->key_list);
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return bit;
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}
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return -1;
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}
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struct agp_memory *agp_create_memory(int scratch_pages)
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{
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struct agp_memory *new;
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new = kmalloc(sizeof(struct agp_memory), GFP_KERNEL);
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if (new == NULL)
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return NULL;
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memset(new, 0, sizeof(struct agp_memory));
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new->key = agp_get_key();
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if (new->key < 0) {
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kfree(new);
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return NULL;
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}
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new->memory = vmalloc(PAGE_SIZE * scratch_pages);
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if (new->memory == NULL) {
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agp_free_key(new->key);
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kfree(new);
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return NULL;
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}
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new->num_scratch_pages = scratch_pages;
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return new;
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}
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EXPORT_SYMBOL(agp_create_memory);
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/**
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* agp_free_memory - free memory associated with an agp_memory pointer.
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*
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* @curr: agp_memory pointer to be freed.
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*
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* It is the only function that can be called when the backend is not owned
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* by the caller. (So it can free memory on client death.)
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*/
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void agp_free_memory(struct agp_memory *curr)
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{
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size_t i;
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if ((agp_bridge->type == NOT_SUPPORTED) || (curr == NULL))
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return;
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if (curr->is_bound == TRUE)
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agp_unbind_memory(curr);
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if (curr->type != 0) {
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agp_bridge->driver->free_by_type(curr);
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return;
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}
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if (curr->page_count != 0) {
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for (i = 0; i < curr->page_count; i++) {
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agp_bridge->driver->agp_destroy_page(phys_to_virt(curr->memory[i]));
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}
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}
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agp_free_key(curr->key);
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vfree(curr->memory);
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kfree(curr);
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}
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EXPORT_SYMBOL(agp_free_memory);
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#define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long))
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/**
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* agp_allocate_memory - allocate a group of pages of a certain type.
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*
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* @page_count: size_t argument of the number of pages
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* @type: u32 argument of the type of memory to be allocated.
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*
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* Every agp bridge device will allow you to allocate AGP_NORMAL_MEMORY which
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* maps to physical ram. Any other type is device dependent.
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*
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* It returns NULL whenever memory is unavailable.
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*/
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struct agp_memory *agp_allocate_memory(size_t page_count, u32 type)
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{
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int scratch_pages;
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struct agp_memory *new;
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size_t i;
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if (agp_bridge->type == NOT_SUPPORTED)
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return NULL;
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if ((atomic_read(&agp_bridge->current_memory_agp) + page_count) > agp_bridge->max_memory_agp)
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return NULL;
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if (type != 0) {
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new = agp_bridge->driver->alloc_by_type(page_count, type);
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return new;
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}
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scratch_pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE;
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new = agp_create_memory(scratch_pages);
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if (new == NULL)
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return NULL;
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for (i = 0; i < page_count; i++) {
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void *addr = agp_bridge->driver->agp_alloc_page();
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if (addr == NULL) {
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agp_free_memory(new);
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return NULL;
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}
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new->memory[i] =
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agp_bridge->driver->mask_memory(virt_to_phys(addr), type);
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new->page_count++;
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}
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flush_agp_mappings();
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return new;
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}
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EXPORT_SYMBOL(agp_allocate_memory);
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/* End - Generic routines for handling agp_memory structures */
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static int agp_return_size(void)
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{
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int current_size;
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void *temp;
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temp = agp_bridge->current_size;
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switch (agp_bridge->driver->size_type) {
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case U8_APER_SIZE:
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current_size = A_SIZE_8(temp)->size;
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break;
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case U16_APER_SIZE:
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current_size = A_SIZE_16(temp)->size;
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break;
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case U32_APER_SIZE:
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current_size = A_SIZE_32(temp)->size;
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break;
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case LVL2_APER_SIZE:
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current_size = A_SIZE_LVL2(temp)->size;
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break;
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case FIXED_APER_SIZE:
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current_size = A_SIZE_FIX(temp)->size;
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break;
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default:
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current_size = 0;
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break;
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}
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current_size -= (agp_memory_reserved / (1024*1024));
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if (current_size <0)
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current_size = 0;
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return current_size;
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}
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int agp_num_entries(void)
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{
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int num_entries;
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void *temp;
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temp = agp_bridge->current_size;
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switch (agp_bridge->driver->size_type) {
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case U8_APER_SIZE:
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num_entries = A_SIZE_8(temp)->num_entries;
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break;
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case U16_APER_SIZE:
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num_entries = A_SIZE_16(temp)->num_entries;
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break;
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case U32_APER_SIZE:
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num_entries = A_SIZE_32(temp)->num_entries;
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break;
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case LVL2_APER_SIZE:
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num_entries = A_SIZE_LVL2(temp)->num_entries;
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break;
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case FIXED_APER_SIZE:
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num_entries = A_SIZE_FIX(temp)->num_entries;
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break;
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default:
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num_entries = 0;
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break;
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}
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num_entries -= agp_memory_reserved>>PAGE_SHIFT;
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if (num_entries<0)
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num_entries = 0;
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return num_entries;
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}
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EXPORT_SYMBOL_GPL(agp_num_entries);
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/**
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* agp_copy_info - copy bridge state information
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*
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* @info: agp_kern_info pointer. The caller should insure that this pointer is valid.
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*
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* This function copies information about the agp bridge device and the state of
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* the agp backend into an agp_kern_info pointer.
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*/
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int agp_copy_info(struct agp_kern_info *info)
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{
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memset(info, 0, sizeof(struct agp_kern_info));
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if (!agp_bridge || agp_bridge->type == NOT_SUPPORTED ||
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!agp_bridge->version) {
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info->chipset = NOT_SUPPORTED;
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return -EIO;
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}
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info->version.major = agp_bridge->version->major;
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info->version.minor = agp_bridge->version->minor;
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info->chipset = agp_bridge->type;
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info->device = agp_bridge->dev;
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info->mode = agp_bridge->mode;
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info->aper_base = agp_bridge->gart_bus_addr;
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info->aper_size = agp_return_size();
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info->max_memory = agp_bridge->max_memory_agp;
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info->current_memory = atomic_read(&agp_bridge->current_memory_agp);
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info->cant_use_aperture = agp_bridge->driver->cant_use_aperture;
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info->vm_ops = agp_bridge->vm_ops;
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info->page_mask = ~0UL;
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return 0;
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}
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EXPORT_SYMBOL(agp_copy_info);
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/* End - Routine to copy over information structure */
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/*
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* Routines for handling swapping of agp_memory into the GATT -
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* These routines take agp_memory and insert them into the GATT.
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* They call device specific routines to actually write to the GATT.
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*/
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/**
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* agp_bind_memory - Bind an agp_memory structure into the GATT.
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*
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* @curr: agp_memory pointer
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* @pg_start: an offset into the graphics aperture translation table
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*
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* It returns -EINVAL if the pointer == NULL.
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* It returns -EBUSY if the area of the table requested is already in use.
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*/
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int agp_bind_memory(struct agp_memory *curr, off_t pg_start)
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{
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int ret_val;
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if ((agp_bridge->type == NOT_SUPPORTED) || (curr == NULL))
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return -EINVAL;
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if (curr->is_bound == TRUE) {
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printk (KERN_INFO PFX "memory %p is already bound!\n", curr);
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return -EINVAL;
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}
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if (curr->is_flushed == FALSE) {
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agp_bridge->driver->cache_flush();
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curr->is_flushed = TRUE;
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}
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ret_val = agp_bridge->driver->insert_memory(curr, pg_start, curr->type);
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if (ret_val != 0)
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return ret_val;
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curr->is_bound = TRUE;
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curr->pg_start = pg_start;
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return 0;
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}
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EXPORT_SYMBOL(agp_bind_memory);
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/**
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* agp_unbind_memory - Removes an agp_memory structure from the GATT
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*
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* @curr: agp_memory pointer to be removed from the GATT.
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*
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* It returns -EINVAL if this piece of agp_memory is not currently bound to
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* the graphics aperture translation table or if the agp_memory pointer == NULL
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*/
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int agp_unbind_memory(struct agp_memory *curr)
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{
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int ret_val;
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if ((agp_bridge->type == NOT_SUPPORTED) || (curr == NULL))
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return -EINVAL;
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if (curr->is_bound != TRUE) {
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printk (KERN_INFO PFX "memory %p was not bound!\n", curr);
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return -EINVAL;
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}
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ret_val = agp_bridge->driver->remove_memory(curr, curr->pg_start, curr->type);
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if (ret_val != 0)
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return ret_val;
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curr->is_bound = FALSE;
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curr->pg_start = 0;
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return 0;
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}
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EXPORT_SYMBOL(agp_unbind_memory);
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/* End - Routines for handling swapping of agp_memory into the GATT */
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/* Generic Agp routines - Start */
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static void agp_v2_parse_one(u32 *mode, u32 *cmd, u32 *tmp)
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{
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/* disable SBA if it's not supported */
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if (!((*cmd & AGPSTAT_SBA) && (*tmp & AGPSTAT_SBA) && (*mode & AGPSTAT_SBA)))
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*cmd &= ~AGPSTAT_SBA;
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/* Set speed */
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if (!((*cmd & AGPSTAT2_4X) && (*tmp & AGPSTAT2_4X) && (*mode & AGPSTAT2_4X)))
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*cmd &= ~AGPSTAT2_4X;
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if (!((*cmd & AGPSTAT2_2X) && (*tmp & AGPSTAT2_2X) && (*mode & AGPSTAT2_2X)))
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*cmd &= ~AGPSTAT2_2X;
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if (!((*cmd & AGPSTAT2_1X) && (*tmp & AGPSTAT2_1X) && (*mode & AGPSTAT2_1X)))
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*cmd &= ~AGPSTAT2_1X;
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/* Now we know what mode it should be, clear out the unwanted bits. */
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if (*cmd & AGPSTAT2_4X)
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*cmd &= ~(AGPSTAT2_1X | AGPSTAT2_2X); /* 4X */
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if (*cmd & AGPSTAT2_2X)
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*cmd &= ~(AGPSTAT2_1X | AGPSTAT2_4X); /* 2X */
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if (*cmd & AGPSTAT2_1X)
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*cmd &= ~(AGPSTAT2_2X | AGPSTAT2_4X); /* 1X */
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}
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/*
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* mode = requested mode.
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* cmd = PCI_AGP_STATUS from agp bridge.
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* tmp = PCI_AGP_STATUS from graphic card.
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*/
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static void agp_v3_parse_one(u32 *mode, u32 *cmd, u32 *tmp)
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{
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u32 origcmd=*cmd, origtmp=*tmp;
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/* ARQSZ - Set the value to the maximum one.
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* Don't allow the mode register to override values. */
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*cmd = ((*cmd & ~AGPSTAT_ARQSZ) |
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max_t(u32,(*cmd & AGPSTAT_ARQSZ),(*tmp & AGPSTAT_ARQSZ)));
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/* Calibration cycle.
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* Don't allow the mode register to override values. */
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*cmd = ((*cmd & ~AGPSTAT_CAL_MASK) |
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min_t(u32,(*cmd & AGPSTAT_CAL_MASK),(*tmp & AGPSTAT_CAL_MASK)));
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/* SBA *must* be supported for AGP v3 */
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*cmd |= AGPSTAT_SBA;
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/*
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* Set speed.
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* Check for invalid speeds. This can happen when applications
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* written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware
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*/
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if (*mode & AGPSTAT_MODE_3_0) {
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/*
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* Caller hasn't a clue what its doing. We are in 3.0 mode,
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* have been passed a 3.0 mode, but with 2.x speed bits set.
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* AGP2.x 4x -> AGP3.0 4x.
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*/
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if (*mode & AGPSTAT2_4X) {
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printk (KERN_INFO PFX "%s passes broken AGP3 flags (%x). Fixed.\n",
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current->comm, *mode);
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*mode &= ~AGPSTAT2_4X;
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*mode |= AGPSTAT3_4X;
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}
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} else {
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/*
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* The caller doesn't know what they are doing. We are in 3.0 mode,
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* but have been passed an AGP 2.x mode.
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* Convert AGP 1x,2x,4x -> AGP 3.0 4x.
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*/
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printk (KERN_INFO PFX "%s passes broken AGP2 flags (%x) in AGP3 mode. Fixed.\n",
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current->comm, *mode);
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*mode &= ~(AGPSTAT2_4X | AGPSTAT2_2X | AGPSTAT2_1X);
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*mode |= AGPSTAT3_4X;
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}
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if (*mode & AGPSTAT3_8X) {
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if (!(*cmd & AGPSTAT3_8X)) {
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*cmd &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD);
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*cmd |= AGPSTAT3_4X;
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printk ("%s requested AGPx8 but bridge not capable.\n", current->comm);
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return;
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}
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if (!(*tmp & AGPSTAT3_8X)) {
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*cmd &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD);
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*cmd |= AGPSTAT3_4X;
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printk ("%s requested AGPx8 but graphic card not capable.\n", current->comm);
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return;
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}
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/* All set, bridge & device can do AGP x8*/
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*cmd &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD);
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return;
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} else {
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/*
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* If we didn't specify AGPx8, we can only do x4.
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* If the hardware can't do x4, we're up shit creek, and never
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* should have got this far.
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*/
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*cmd &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD);
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if ((*cmd & AGPSTAT3_4X) && (*tmp & AGPSTAT3_4X))
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*cmd |= AGPSTAT3_4X;
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else {
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printk (KERN_INFO PFX "Badness. Don't know which AGP mode to set. "
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"[cmd:%x tmp:%x fell back to:- cmd:%x tmp:%x]\n",
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origcmd, origtmp, *cmd, *tmp);
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if (!(*cmd & AGPSTAT3_4X))
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printk (KERN_INFO PFX "Bridge couldn't do AGP x4.\n");
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if (!(*tmp & AGPSTAT3_4X))
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printk (KERN_INFO PFX "Graphic card couldn't do AGP x4.\n");
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}
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}
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}
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|
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//FIXME: This doesn't smell right.
|
|
//We need a function we pass an agp_device to.
|
|
u32 agp_collect_device_status(u32 mode, u32 cmd)
|
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{
|
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struct pci_dev *device = NULL;
|
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u8 cap_ptr;
|
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u32 tmp;
|
|
u32 agp3;
|
|
|
|
while ((device = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, device)) != NULL) {
|
|
cap_ptr = pci_find_capability(device, PCI_CAP_ID_AGP);
|
|
if (!cap_ptr)
|
|
continue;
|
|
|
|
//FIXME: We should probably skip anything here that
|
|
// isn't an AGP graphic card.
|
|
/*
|
|
* Ok, here we have a AGP device. Disable impossible
|
|
* settings, and adjust the readqueue to the minimum.
|
|
*/
|
|
pci_read_config_dword(device, cap_ptr+PCI_AGP_STATUS, &tmp);
|
|
|
|
/* adjust RQ depth */
|
|
cmd = ((cmd & ~AGPSTAT_RQ_DEPTH) |
|
|
min_t(u32, (mode & AGPSTAT_RQ_DEPTH),
|
|
min_t(u32, (cmd & AGPSTAT_RQ_DEPTH), (tmp & AGPSTAT_RQ_DEPTH))));
|
|
|
|
/* disable FW if it's not supported */
|
|
if (!((cmd & AGPSTAT_FW) && (tmp & AGPSTAT_FW) && (mode & AGPSTAT_FW)))
|
|
cmd &= ~AGPSTAT_FW;
|
|
|
|
/* Check to see if we are operating in 3.0 mode */
|
|
pci_read_config_dword(device, cap_ptr+AGPSTAT, &agp3);
|
|
if (agp3 & AGPSTAT_MODE_3_0) {
|
|
agp_v3_parse_one(&mode, &cmd, &tmp);
|
|
} else {
|
|
agp_v2_parse_one(&mode, &cmd, &tmp);
|
|
}
|
|
}
|
|
return cmd;
|
|
}
|
|
EXPORT_SYMBOL(agp_collect_device_status);
|
|
|
|
|
|
void agp_device_command(u32 command, int agp_v3)
|
|
{
|
|
struct pci_dev *device = NULL;
|
|
int mode;
|
|
|
|
mode = command & 0x7;
|
|
if (agp_v3)
|
|
mode *= 4;
|
|
|
|
while ((device = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, device)) != NULL) {
|
|
u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
|
|
if (!agp)
|
|
continue;
|
|
|
|
printk(KERN_INFO PFX "Putting AGP V%d device at %s into %dx mode\n",
|
|
agp_v3 ? 3 : 2, pci_name(device), mode);
|
|
pci_write_config_dword(device, agp + PCI_AGP_COMMAND, command);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(agp_device_command);
|
|
|
|
|
|
void get_agp_version(struct agp_bridge_data *bridge)
|
|
{
|
|
u32 ncapid;
|
|
|
|
/* Exit early if already set by errata workarounds. */
|
|
if (agp_bridge->major_version != 0)
|
|
return;
|
|
|
|
pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx, &ncapid);
|
|
agp_bridge->major_version = (ncapid >> AGP_MAJOR_VERSION_SHIFT) & 0xf;
|
|
agp_bridge->minor_version = (ncapid >> AGP_MINOR_VERSION_SHIFT) & 0xf;
|
|
}
|
|
EXPORT_SYMBOL(get_agp_version);
|
|
|
|
|
|
void agp_generic_enable(u32 mode)
|
|
{
|
|
u32 command, temp;
|
|
u32 agp3;
|
|
|
|
get_agp_version(agp_bridge);
|
|
|
|
printk(KERN_INFO PFX "Found an AGP %d.%d compliant device at %s.\n",
|
|
agp_bridge->major_version,
|
|
agp_bridge->minor_version,
|
|
agp_bridge->dev->slot_name);
|
|
|
|
pci_read_config_dword(agp_bridge->dev,
|
|
agp_bridge->capndx + PCI_AGP_STATUS, &command);
|
|
|
|
command = agp_collect_device_status(mode, command);
|
|
command |= AGPSTAT_AGP_ENABLE;
|
|
|
|
/* Do AGP version specific frobbing. */
|
|
if(agp_bridge->major_version >= 3) {
|
|
pci_read_config_dword(agp_bridge->dev,
|
|
agp_bridge->capndx+AGPSTAT, &agp3);
|
|
|
|
/* Check to see if we are operating in 3.0 mode */
|
|
if (agp3 & AGPSTAT_MODE_3_0) {
|
|
/* If we have 3.5, we can do the isoch stuff. */
|
|
if (agp_bridge->minor_version >= 5)
|
|
agp_3_5_enable(agp_bridge);
|
|
agp_device_command(command, TRUE);
|
|
return;
|
|
} else {
|
|
/* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/
|
|
command &= ~(7<<10) ;
|
|
pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &temp);
|
|
temp |= (1<<9);
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, temp);
|
|
|
|
printk (KERN_INFO PFX "Device is in legacy mode,"
|
|
" falling back to 2.x\n");
|
|
}
|
|
}
|
|
|
|
/* AGP v<3 */
|
|
agp_device_command(command, FALSE);
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_enable);
|
|
|
|
|
|
int agp_generic_create_gatt_table(void)
|
|
{
|
|
char *table;
|
|
char *table_end;
|
|
int size;
|
|
int page_order;
|
|
int num_entries;
|
|
int i;
|
|
void *temp;
|
|
struct page *page;
|
|
|
|
/* The generic routines can't handle 2 level gatt's */
|
|
if (agp_bridge->driver->size_type == LVL2_APER_SIZE)
|
|
return -EINVAL;
|
|
|
|
table = NULL;
|
|
i = agp_bridge->aperture_size_idx;
|
|
temp = agp_bridge->current_size;
|
|
size = page_order = num_entries = 0;
|
|
|
|
if (agp_bridge->driver->size_type != FIXED_APER_SIZE) {
|
|
do {
|
|
switch (agp_bridge->driver->size_type) {
|
|
case U8_APER_SIZE:
|
|
size = A_SIZE_8(temp)->size;
|
|
page_order =
|
|
A_SIZE_8(temp)->page_order;
|
|
num_entries =
|
|
A_SIZE_8(temp)->num_entries;
|
|
break;
|
|
case U16_APER_SIZE:
|
|
size = A_SIZE_16(temp)->size;
|
|
page_order = A_SIZE_16(temp)->page_order;
|
|
num_entries = A_SIZE_16(temp)->num_entries;
|
|
break;
|
|
case U32_APER_SIZE:
|
|
size = A_SIZE_32(temp)->size;
|
|
page_order = A_SIZE_32(temp)->page_order;
|
|
num_entries = A_SIZE_32(temp)->num_entries;
|
|
break;
|
|
/* This case will never really happen. */
|
|
case FIXED_APER_SIZE:
|
|
case LVL2_APER_SIZE:
|
|
default:
|
|
size = page_order = num_entries = 0;
|
|
break;
|
|
}
|
|
|
|
table = (char *) __get_free_pages(GFP_KERNEL,
|
|
page_order);
|
|
|
|
if (table == NULL) {
|
|
i++;
|
|
switch (agp_bridge->driver->size_type) {
|
|
case U8_APER_SIZE:
|
|
agp_bridge->current_size = A_IDX8(agp_bridge);
|
|
break;
|
|
case U16_APER_SIZE:
|
|
agp_bridge->current_size = A_IDX16(agp_bridge);
|
|
break;
|
|
case U32_APER_SIZE:
|
|
agp_bridge->current_size = A_IDX32(agp_bridge);
|
|
break;
|
|
/* This case will never really happen. */
|
|
case FIXED_APER_SIZE:
|
|
case LVL2_APER_SIZE:
|
|
default:
|
|
agp_bridge->current_size =
|
|
agp_bridge->current_size;
|
|
break;
|
|
}
|
|
temp = agp_bridge->current_size;
|
|
} else {
|
|
agp_bridge->aperture_size_idx = i;
|
|
}
|
|
} while (!table && (i < agp_bridge->driver->num_aperture_sizes));
|
|
} else {
|
|
size = ((struct aper_size_info_fixed *) temp)->size;
|
|
page_order = ((struct aper_size_info_fixed *) temp)->page_order;
|
|
num_entries = ((struct aper_size_info_fixed *) temp)->num_entries;
|
|
table = (char *) __get_free_pages(GFP_KERNEL, page_order);
|
|
}
|
|
|
|
if (table == NULL)
|
|
return -ENOMEM;
|
|
|
|
table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
|
|
|
|
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
|
|
SetPageReserved(page);
|
|
|
|
agp_bridge->gatt_table_real = (u32 *) table;
|
|
agp_gatt_table = (void *)table;
|
|
|
|
agp_bridge->driver->cache_flush();
|
|
agp_bridge->gatt_table = ioremap_nocache(virt_to_phys(table),
|
|
(PAGE_SIZE * (1 << page_order)));
|
|
agp_bridge->driver->cache_flush();
|
|
|
|
if (agp_bridge->gatt_table == NULL) {
|
|
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
|
|
ClearPageReserved(page);
|
|
|
|
free_pages((unsigned long) table, page_order);
|
|
|
|
return -ENOMEM;
|
|
}
|
|
agp_bridge->gatt_bus_addr = virt_to_phys(agp_bridge->gatt_table_real);
|
|
|
|
/* AK: bogus, should encode addresses > 4GB */
|
|
for (i = 0; i < num_entries; i++)
|
|
writel(agp_bridge->scratch_page, agp_bridge->gatt_table+i);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_create_gatt_table);
|
|
|
|
int agp_generic_free_gatt_table(void)
|
|
{
|
|
int page_order;
|
|
char *table, *table_end;
|
|
void *temp;
|
|
struct page *page;
|
|
|
|
temp = agp_bridge->current_size;
|
|
|
|
switch (agp_bridge->driver->size_type) {
|
|
case U8_APER_SIZE:
|
|
page_order = A_SIZE_8(temp)->page_order;
|
|
break;
|
|
case U16_APER_SIZE:
|
|
page_order = A_SIZE_16(temp)->page_order;
|
|
break;
|
|
case U32_APER_SIZE:
|
|
page_order = A_SIZE_32(temp)->page_order;
|
|
break;
|
|
case FIXED_APER_SIZE:
|
|
page_order = A_SIZE_FIX(temp)->page_order;
|
|
break;
|
|
case LVL2_APER_SIZE:
|
|
/* The generic routines can't deal with 2 level gatt's */
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
page_order = 0;
|
|
break;
|
|
}
|
|
|
|
/* Do not worry about freeing memory, because if this is
|
|
* called, then all agp memory is deallocated and removed
|
|
* from the table. */
|
|
|
|
iounmap(agp_bridge->gatt_table);
|
|
table = (char *) agp_bridge->gatt_table_real;
|
|
table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
|
|
|
|
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
|
|
ClearPageReserved(page);
|
|
|
|
free_pages((unsigned long) agp_bridge->gatt_table_real, page_order);
|
|
|
|
agp_gatt_table = NULL;
|
|
agp_bridge->gatt_table = NULL;
|
|
agp_bridge->gatt_table_real = NULL;
|
|
agp_bridge->gatt_bus_addr = 0;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_free_gatt_table);
|
|
|
|
|
|
int agp_generic_insert_memory(struct agp_memory * mem, off_t pg_start, int type)
|
|
{
|
|
int num_entries;
|
|
size_t i;
|
|
off_t j;
|
|
void *temp;
|
|
|
|
temp = agp_bridge->current_size;
|
|
|
|
switch (agp_bridge->driver->size_type) {
|
|
case U8_APER_SIZE:
|
|
num_entries = A_SIZE_8(temp)->num_entries;
|
|
break;
|
|
case U16_APER_SIZE:
|
|
num_entries = A_SIZE_16(temp)->num_entries;
|
|
break;
|
|
case U32_APER_SIZE:
|
|
num_entries = A_SIZE_32(temp)->num_entries;
|
|
break;
|
|
case FIXED_APER_SIZE:
|
|
num_entries = A_SIZE_FIX(temp)->num_entries;
|
|
break;
|
|
case LVL2_APER_SIZE:
|
|
/* The generic routines can't deal with 2 level gatt's */
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
num_entries = 0;
|
|
break;
|
|
}
|
|
|
|
num_entries -= agp_memory_reserved/PAGE_SIZE;
|
|
if (num_entries < 0) num_entries = 0;
|
|
|
|
if (type != 0 || mem->type != 0) {
|
|
/* The generic routines know nothing of memory types */
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* AK: could wrap */
|
|
if ((pg_start + mem->page_count) > num_entries)
|
|
return -EINVAL;
|
|
|
|
j = pg_start;
|
|
|
|
while (j < (pg_start + mem->page_count)) {
|
|
if (!PGE_EMPTY(agp_bridge, readl(agp_bridge->gatt_table+j)))
|
|
return -EBUSY;
|
|
j++;
|
|
}
|
|
|
|
if (mem->is_flushed == FALSE) {
|
|
agp_bridge->driver->cache_flush();
|
|
mem->is_flushed = TRUE;
|
|
}
|
|
|
|
for (i = 0, j = pg_start; i < mem->page_count; i++, j++)
|
|
writel(agp_bridge->driver->mask_memory(mem->memory[i], mem->type), agp_bridge->gatt_table+j);
|
|
|
|
agp_bridge->driver->tlb_flush(mem);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_insert_memory);
|
|
|
|
|
|
int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type)
|
|
{
|
|
size_t i;
|
|
|
|
if (type != 0 || mem->type != 0) {
|
|
/* The generic routines know nothing of memory types */
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* AK: bogus, should encode addresses > 4GB */
|
|
for (i = pg_start; i < (mem->page_count + pg_start); i++)
|
|
writel(agp_bridge->scratch_page, agp_bridge->gatt_table+i);
|
|
|
|
agp_bridge->driver->tlb_flush(mem);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_remove_memory);
|
|
|
|
|
|
struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type)
|
|
{
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_alloc_by_type);
|
|
|
|
|
|
void agp_generic_free_by_type(struct agp_memory *curr)
|
|
{
|
|
if (curr->memory != NULL)
|
|
vfree(curr->memory);
|
|
|
|
agp_free_key(curr->key);
|
|
kfree(curr);
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_free_by_type);
|
|
|
|
|
|
/*
|
|
* Basic Page Allocation Routines -
|
|
* These routines handle page allocation and by default they reserve the allocated
|
|
* memory. They also handle incrementing the current_memory_agp value, Which is checked
|
|
* against a maximum value.
|
|
*/
|
|
|
|
void *agp_generic_alloc_page(void)
|
|
{
|
|
struct page * page;
|
|
|
|
page = alloc_page(GFP_KERNEL);
|
|
if (page == NULL)
|
|
return NULL;
|
|
|
|
map_page_into_agp(page);
|
|
|
|
get_page(page);
|
|
SetPageLocked(page);
|
|
atomic_inc(&agp_bridge->current_memory_agp);
|
|
return page_address(page);
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_alloc_page);
|
|
|
|
|
|
void agp_generic_destroy_page(void *addr)
|
|
{
|
|
struct page *page;
|
|
|
|
if (addr == NULL)
|
|
return;
|
|
|
|
page = virt_to_page(addr);
|
|
unmap_page_from_agp(page);
|
|
put_page(page);
|
|
unlock_page(page);
|
|
free_page((unsigned long)addr);
|
|
atomic_dec(&agp_bridge->current_memory_agp);
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_destroy_page);
|
|
|
|
/* End Basic Page Allocation Routines */
|
|
|
|
|
|
/**
|
|
* agp_enable - initialise the agp point-to-point connection.
|
|
*
|
|
* @mode: agp mode register value to configure with.
|
|
*/
|
|
void agp_enable(u32 mode)
|
|
{
|
|
if (agp_bridge->type == NOT_SUPPORTED)
|
|
return;
|
|
agp_bridge->driver->agp_enable(mode);
|
|
}
|
|
EXPORT_SYMBOL(agp_enable);
|
|
|
|
|
|
#ifdef CONFIG_SMP
|
|
static void ipi_handler(void *null)
|
|
{
|
|
flush_agp_cache();
|
|
}
|
|
#endif
|
|
|
|
void global_cache_flush(void)
|
|
{
|
|
#ifdef CONFIG_SMP
|
|
if (on_each_cpu(ipi_handler, NULL, 1, 1) != 0)
|
|
panic(PFX "timed out waiting for the other CPUs!\n");
|
|
#else
|
|
flush_agp_cache();
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(global_cache_flush);
|
|
|
|
unsigned long agp_generic_mask_memory(unsigned long addr, int type)
|
|
{
|
|
/* memory type is ignored in the generic routine */
|
|
if (agp_bridge->driver->masks)
|
|
return addr | agp_bridge->driver->masks[0].mask;
|
|
else
|
|
return addr;
|
|
}
|
|
EXPORT_SYMBOL(agp_generic_mask_memory);
|
|
|
|
/*
|
|
* These functions are implemented according to the AGPv3 spec,
|
|
* which covers implementation details that had previously been
|
|
* left open.
|
|
*/
|
|
|
|
int agp3_generic_fetch_size(void)
|
|
{
|
|
u16 temp_size;
|
|
int i;
|
|
struct aper_size_info_16 *values;
|
|
|
|
pci_read_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, &temp_size);
|
|
values = A_SIZE_16(agp_bridge->driver->aperture_sizes);
|
|
|
|
for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
|
|
if (temp_size == values[i].size_value) {
|
|
agp_bridge->previous_size =
|
|
agp_bridge->current_size = (void *) (values + i);
|
|
|
|
agp_bridge->aperture_size_idx = i;
|
|
return values[i].size;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp3_generic_fetch_size);
|
|
|
|
void agp3_generic_tlbflush(struct agp_memory *mem)
|
|
{
|
|
u32 ctrl;
|
|
pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl);
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_GTLBEN);
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl);
|
|
}
|
|
EXPORT_SYMBOL(agp3_generic_tlbflush);
|
|
|
|
int agp3_generic_configure(void)
|
|
{
|
|
u32 temp;
|
|
struct aper_size_info_16 *current_size;
|
|
|
|
current_size = A_SIZE_16(agp_bridge->current_size);
|
|
|
|
pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
|
|
agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
|
|
|
|
/* set aperture size */
|
|
pci_write_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, current_size->size_value);
|
|
/* set gart pointer */
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPGARTLO, agp_bridge->gatt_bus_addr);
|
|
/* enable aperture and GTLB */
|
|
pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &temp);
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, temp | AGPCTRL_APERENB | AGPCTRL_GTLBEN);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(agp3_generic_configure);
|
|
|
|
void agp3_generic_cleanup(void)
|
|
{
|
|
u32 ctrl;
|
|
pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl);
|
|
pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_APERENB);
|
|
}
|
|
EXPORT_SYMBOL(agp3_generic_cleanup);
|
|
|
|
struct aper_size_info_16 agp3_generic_sizes[AGP_GENERIC_SIZES_ENTRIES] =
|
|
{
|
|
{4096, 1048576, 10,0x000},
|
|
{2048, 524288, 9, 0x800},
|
|
{1024, 262144, 8, 0xc00},
|
|
{ 512, 131072, 7, 0xe00},
|
|
{ 256, 65536, 6, 0xf00},
|
|
{ 128, 32768, 5, 0xf20},
|
|
{ 64, 16384, 4, 0xf30},
|
|
{ 32, 8192, 3, 0xf38},
|
|
{ 16, 4096, 2, 0xf3c},
|
|
{ 8, 2048, 1, 0xf3e},
|
|
{ 4, 1024, 0, 0xf3f}
|
|
};
|
|
EXPORT_SYMBOL(agp3_generic_sizes);
|
|
|