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1416 lines
36 KiB
1416 lines
36 KiB
/* |
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* AGPGART driver. |
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* Copyright (C) 2004 Silicon Graphics, Inc. |
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* Copyright (C) 2002-2005 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/module.h> |
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#include <linux/pci.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 <linux/dma-mapping.h> |
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#include <linux/mm.h> |
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#include <linux/sched.h> |
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#include <linux/slab.h> |
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#include <asm/io.h> |
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#ifdef CONFIG_X86 |
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#include <asm/set_memory.h> |
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#endif |
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#include "agp.h" |
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|
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__u32 *agp_gatt_table; |
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int agp_memory_reserved; |
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|
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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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/* |
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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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|
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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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|
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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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|
|
|
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static int agp_get_key(void) |
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{ |
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int bit; |
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|
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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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|
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/* |
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* Use kmalloc if possible for the page list. Otherwise fall back to |
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* vmalloc. This speeds things up and also saves memory for small AGP |
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* regions. |
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*/ |
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|
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void agp_alloc_page_array(size_t size, struct agp_memory *mem) |
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{ |
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mem->pages = kvmalloc(size, GFP_KERNEL); |
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} |
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EXPORT_SYMBOL(agp_alloc_page_array); |
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|
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static struct agp_memory *agp_create_user_memory(unsigned long num_agp_pages) |
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{ |
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struct agp_memory *new; |
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unsigned long alloc_size = num_agp_pages*sizeof(struct page *); |
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|
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if (INT_MAX/sizeof(struct page *) < num_agp_pages) |
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return NULL; |
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|
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new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); |
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if (new == NULL) |
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return NULL; |
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|
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new->key = agp_get_key(); |
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|
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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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|
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agp_alloc_page_array(alloc_size, new); |
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|
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if (new->pages == 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 = 0; |
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return new; |
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} |
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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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|
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new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); |
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if (new == NULL) |
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return NULL; |
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|
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new->key = agp_get_key(); |
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|
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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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|
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agp_alloc_page_array(PAGE_SIZE * scratch_pages, new); |
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|
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if (new->pages == 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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new->type = AGP_NORMAL_MEMORY; |
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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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/** |
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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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|
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if (curr == NULL) |
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return; |
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|
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if (curr->is_bound) |
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agp_unbind_memory(curr); |
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|
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if (curr->type >= AGP_USER_TYPES) { |
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agp_generic_free_by_type(curr); |
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return; |
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} |
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|
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if (curr->type != 0) { |
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curr->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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if (curr->bridge->driver->agp_destroy_pages) { |
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curr->bridge->driver->agp_destroy_pages(curr); |
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} else { |
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|
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for (i = 0; i < curr->page_count; i++) { |
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curr->bridge->driver->agp_destroy_page( |
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curr->pages[i], |
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AGP_PAGE_DESTROY_UNMAP); |
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} |
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for (i = 0; i < curr->page_count; i++) { |
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curr->bridge->driver->agp_destroy_page( |
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curr->pages[i], |
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AGP_PAGE_DESTROY_FREE); |
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} |
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} |
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} |
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agp_free_key(curr->key); |
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agp_free_page_array(curr); |
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kfree(curr); |
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} |
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EXPORT_SYMBOL(agp_free_memory); |
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|
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#define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long)) |
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|
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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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* @bridge: an agp_bridge_data struct allocated for the AGP host bridge. |
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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(struct agp_bridge_data *bridge, |
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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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int cur_memory; |
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|
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if (!bridge) |
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return NULL; |
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|
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cur_memory = atomic_read(&bridge->current_memory_agp); |
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if ((cur_memory + page_count > bridge->max_memory_agp) || |
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(cur_memory + page_count < page_count)) |
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return NULL; |
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|
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if (type >= AGP_USER_TYPES) { |
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new = agp_generic_alloc_user(page_count, type); |
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if (new) |
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new->bridge = bridge; |
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return new; |
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} |
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|
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if (type != 0) { |
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new = bridge->driver->alloc_by_type(page_count, type); |
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if (new) |
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new->bridge = bridge; |
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return new; |
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} |
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|
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scratch_pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; |
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|
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new = agp_create_memory(scratch_pages); |
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|
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if (new == NULL) |
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return NULL; |
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|
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if (bridge->driver->agp_alloc_pages) { |
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if (bridge->driver->agp_alloc_pages(bridge, new, page_count)) { |
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agp_free_memory(new); |
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return NULL; |
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} |
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new->bridge = bridge; |
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return new; |
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} |
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|
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for (i = 0; i < page_count; i++) { |
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struct page *page = bridge->driver->agp_alloc_page(bridge); |
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|
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if (page == NULL) { |
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agp_free_memory(new); |
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return NULL; |
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} |
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new->pages[i] = page; |
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new->page_count++; |
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} |
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new->bridge = bridge; |
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|
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return new; |
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} |
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EXPORT_SYMBOL(agp_allocate_memory); |
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|
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|
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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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|
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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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|
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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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* @bridge: an agp_bridge_data struct allocated for the AGP host bridge. |
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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_bridge_data *bridge, 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 (!bridge) { |
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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 = bridge->version->major; |
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info->version.minor = bridge->version->minor; |
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info->chipset = SUPPORTED; |
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info->device = bridge->dev; |
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if (bridge->mode & AGPSTAT_MODE_3_0) |
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info->mode = bridge->mode & ~AGP3_RESERVED_MASK; |
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else |
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info->mode = bridge->mode & ~AGP2_RESERVED_MASK; |
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info->aper_base = bridge->gart_bus_addr; |
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info->aper_size = agp_return_size(); |
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info->max_memory = bridge->max_memory_agp; |
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info->current_memory = atomic_read(&bridge->current_memory_agp); |
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info->cant_use_aperture = bridge->driver->cant_use_aperture; |
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info->vm_ops = 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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|
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/* End - Routine to copy over information structure */ |
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|
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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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/** |
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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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|
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if (curr == NULL) |
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return -EINVAL; |
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|
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if (curr->is_bound) { |
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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) { |
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curr->bridge->driver->cache_flush(); |
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curr->is_flushed = true; |
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} |
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|
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ret_val = curr->bridge->driver->insert_memory(curr, pg_start, curr->type); |
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|
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if (ret_val != 0) |
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return ret_val; |
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|
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curr->is_bound = true; |
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curr->pg_start = pg_start; |
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spin_lock(&agp_bridge->mapped_lock); |
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list_add(&curr->mapped_list, &agp_bridge->mapped_list); |
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spin_unlock(&agp_bridge->mapped_lock); |
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|
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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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|
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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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|
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if (curr == NULL) |
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return -EINVAL; |
|
|
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if (!curr->is_bound) { |
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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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|
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ret_val = curr->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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spin_lock(&curr->bridge->mapped_lock); |
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list_del(&curr->mapped_list); |
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spin_unlock(&curr->bridge->mapped_lock); |
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return 0; |
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} |
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EXPORT_SYMBOL(agp_unbind_memory); |
|
|
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|
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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 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) |
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{ |
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u32 tmp; |
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|
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if (*requested_mode & AGP2_RESERVED_MASK) { |
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printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", |
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*requested_mode & AGP2_RESERVED_MASK, *requested_mode); |
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*requested_mode &= ~AGP2_RESERVED_MASK; |
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} |
|
|
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/* |
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* Some dumb bridges are programmed to disobey the AGP2 spec. |
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* This is likely a BIOS misprogramming rather than poweron default, or |
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* it would be a lot more common. |
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* https://bugs.freedesktop.org/show_bug.cgi?id=8816 |
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* AGPv2 spec 6.1.9 states: |
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* The RATE field indicates the data transfer rates supported by this |
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* device. A.G.P. devices must report all that apply. |
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* Fix them up as best we can. |
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*/ |
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switch (*bridge_agpstat & 7) { |
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case 4: |
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*bridge_agpstat |= (AGPSTAT2_2X | AGPSTAT2_1X); |
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printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x4 rate. " |
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"Fixing up support for x2 & x1\n"); |
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break; |
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case 2: |
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*bridge_agpstat |= AGPSTAT2_1X; |
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printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x2 rate. " |
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"Fixing up support for x1\n"); |
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break; |
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default: |
|
break; |
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} |
|
|
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/* Check the speed bits make sense. Only one should be set. */ |
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tmp = *requested_mode & 7; |
|
switch (tmp) { |
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case 0: |
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printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to x1 mode.\n", current->comm); |
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*requested_mode |= AGPSTAT2_1X; |
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break; |
|
case 1: |
|
case 2: |
|
break; |
|
case 3: |
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*requested_mode &= ~(AGPSTAT2_1X); /* rate=2 */ |
|
break; |
|
case 4: |
|
break; |
|
case 5: |
|
case 6: |
|
case 7: |
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*requested_mode &= ~(AGPSTAT2_1X|AGPSTAT2_2X); /* rate=4*/ |
|
break; |
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} |
|
|
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/* disable SBA if it's not supported */ |
|
if (!((*bridge_agpstat & AGPSTAT_SBA) && (*vga_agpstat & AGPSTAT_SBA) && (*requested_mode & AGPSTAT_SBA))) |
|
*bridge_agpstat &= ~AGPSTAT_SBA; |
|
|
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/* Set rate */ |
|
if (!((*bridge_agpstat & AGPSTAT2_4X) && (*vga_agpstat & AGPSTAT2_4X) && (*requested_mode & AGPSTAT2_4X))) |
|
*bridge_agpstat &= ~AGPSTAT2_4X; |
|
|
|
if (!((*bridge_agpstat & AGPSTAT2_2X) && (*vga_agpstat & AGPSTAT2_2X) && (*requested_mode & AGPSTAT2_2X))) |
|
*bridge_agpstat &= ~AGPSTAT2_2X; |
|
|
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if (!((*bridge_agpstat & AGPSTAT2_1X) && (*vga_agpstat & AGPSTAT2_1X) && (*requested_mode & AGPSTAT2_1X))) |
|
*bridge_agpstat &= ~AGPSTAT2_1X; |
|
|
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/* Now we know what mode it should be, clear out the unwanted bits. */ |
|
if (*bridge_agpstat & AGPSTAT2_4X) |
|
*bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_2X); /* 4X */ |
|
|
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if (*bridge_agpstat & AGPSTAT2_2X) |
|
*bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_4X); /* 2X */ |
|
|
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if (*bridge_agpstat & AGPSTAT2_1X) |
|
*bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); /* 1X */ |
|
|
|
/* Apply any errata. */ |
|
if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) |
|
*bridge_agpstat &= ~AGPSTAT_FW; |
|
|
|
if (agp_bridge->flags & AGP_ERRATA_SBA) |
|
*bridge_agpstat &= ~AGPSTAT_SBA; |
|
|
|
if (agp_bridge->flags & AGP_ERRATA_1X) { |
|
*bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); |
|
*bridge_agpstat |= AGPSTAT2_1X; |
|
} |
|
|
|
/* If we've dropped down to 1X, disable fast writes. */ |
|
if (*bridge_agpstat & AGPSTAT2_1X) |
|
*bridge_agpstat &= ~AGPSTAT_FW; |
|
} |
|
|
|
/* |
|
* requested_mode = Mode requested by (typically) X. |
|
* bridge_agpstat = PCI_AGP_STATUS from agp bridge. |
|
* vga_agpstat = PCI_AGP_STATUS from graphic card. |
|
*/ |
|
static void agp_v3_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) |
|
{ |
|
u32 origbridge=*bridge_agpstat, origvga=*vga_agpstat; |
|
u32 tmp; |
|
|
|
if (*requested_mode & AGP3_RESERVED_MASK) { |
|
printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", |
|
*requested_mode & AGP3_RESERVED_MASK, *requested_mode); |
|
*requested_mode &= ~AGP3_RESERVED_MASK; |
|
} |
|
|
|
/* Check the speed bits make sense. */ |
|
tmp = *requested_mode & 7; |
|
if (tmp == 0) { |
|
printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to AGP3 x4 mode.\n", current->comm); |
|
*requested_mode |= AGPSTAT3_4X; |
|
} |
|
if (tmp >= 3) { |
|
printk(KERN_INFO PFX "%s tried to set rate=x%d. Setting to AGP3 x8 mode.\n", current->comm, tmp * 4); |
|
*requested_mode = (*requested_mode & ~7) | AGPSTAT3_8X; |
|
} |
|
|
|
/* ARQSZ - Set the value to the maximum one. |
|
* Don't allow the mode register to override values. */ |
|
*bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_ARQSZ) | |
|
max_t(u32,(*bridge_agpstat & AGPSTAT_ARQSZ),(*vga_agpstat & AGPSTAT_ARQSZ))); |
|
|
|
/* Calibration cycle. |
|
* Don't allow the mode register to override values. */ |
|
*bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_CAL_MASK) | |
|
min_t(u32,(*bridge_agpstat & AGPSTAT_CAL_MASK),(*vga_agpstat & AGPSTAT_CAL_MASK))); |
|
|
|
/* SBA *must* be supported for AGP v3 */ |
|
*bridge_agpstat |= AGPSTAT_SBA; |
|
|
|
/* |
|
* Set speed. |
|
* Check for invalid speeds. This can happen when applications |
|
* written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware |
|
*/ |
|
if (*requested_mode & AGPSTAT_MODE_3_0) { |
|
/* |
|
* Caller hasn't a clue what it is doing. Bridge is in 3.0 mode, |
|
* have been passed a 3.0 mode, but with 2.x speed bits set. |
|
* AGP2.x 4x -> AGP3.0 4x. |
|
*/ |
|
if (*requested_mode & AGPSTAT2_4X) { |
|
printk(KERN_INFO PFX "%s passes broken AGP3 flags (%x). Fixed.\n", |
|
current->comm, *requested_mode); |
|
*requested_mode &= ~AGPSTAT2_4X; |
|
*requested_mode |= AGPSTAT3_4X; |
|
} |
|
} else { |
|
/* |
|
* The caller doesn't know what they are doing. We are in 3.0 mode, |
|
* but have been passed an AGP 2.x mode. |
|
* Convert AGP 1x,2x,4x -> AGP 3.0 4x. |
|
*/ |
|
printk(KERN_INFO PFX "%s passes broken AGP2 flags (%x) in AGP3 mode. Fixed.\n", |
|
current->comm, *requested_mode); |
|
*requested_mode &= ~(AGPSTAT2_4X | AGPSTAT2_2X | AGPSTAT2_1X); |
|
*requested_mode |= AGPSTAT3_4X; |
|
} |
|
|
|
if (*requested_mode & AGPSTAT3_8X) { |
|
if (!(*bridge_agpstat & AGPSTAT3_8X)) { |
|
*bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
|
*bridge_agpstat |= AGPSTAT3_4X; |
|
printk(KERN_INFO PFX "%s requested AGPx8 but bridge not capable.\n", current->comm); |
|
return; |
|
} |
|
if (!(*vga_agpstat & AGPSTAT3_8X)) { |
|
*bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
|
*bridge_agpstat |= AGPSTAT3_4X; |
|
printk(KERN_INFO PFX "%s requested AGPx8 but graphic card not capable.\n", current->comm); |
|
return; |
|
} |
|
/* All set, bridge & device can do AGP x8*/ |
|
*bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
|
goto done; |
|
|
|
} else if (*requested_mode & AGPSTAT3_4X) { |
|
*bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
|
*bridge_agpstat |= AGPSTAT3_4X; |
|
goto done; |
|
|
|
} else { |
|
|
|
/* |
|
* If we didn't specify an AGP mode, we see if both |
|
* the graphics card, and the bridge can do x8, and use if so. |
|
* If not, we fall back to x4 mode. |
|
*/ |
|
if ((*bridge_agpstat & AGPSTAT3_8X) && (*vga_agpstat & AGPSTAT3_8X)) { |
|
printk(KERN_INFO PFX "No AGP mode specified. Setting to highest mode " |
|
"supported by bridge & card (x8).\n"); |
|
*bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
|
*vga_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
|
} else { |
|
printk(KERN_INFO PFX "Fell back to AGPx4 mode because "); |
|
if (!(*bridge_agpstat & AGPSTAT3_8X)) { |
|
printk(KERN_INFO PFX "bridge couldn't do x8. bridge_agpstat:%x (orig=%x)\n", |
|
*bridge_agpstat, origbridge); |
|
*bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
|
*bridge_agpstat |= AGPSTAT3_4X; |
|
} |
|
if (!(*vga_agpstat & AGPSTAT3_8X)) { |
|
printk(KERN_INFO PFX "graphics card couldn't do x8. vga_agpstat:%x (orig=%x)\n", |
|
*vga_agpstat, origvga); |
|
*vga_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
|
*vga_agpstat |= AGPSTAT3_4X; |
|
} |
|
} |
|
} |
|
|
|
done: |
|
/* Apply any errata. */ |
|
if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) |
|
*bridge_agpstat &= ~AGPSTAT_FW; |
|
|
|
if (agp_bridge->flags & AGP_ERRATA_SBA) |
|
*bridge_agpstat &= ~AGPSTAT_SBA; |
|
|
|
if (agp_bridge->flags & AGP_ERRATA_1X) { |
|
*bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); |
|
*bridge_agpstat |= AGPSTAT2_1X; |
|
} |
|
} |
|
|
|
|
|
/** |
|
* agp_collect_device_status - determine correct agp_cmd from various agp_stat's |
|
* @bridge: an agp_bridge_data struct allocated for the AGP host bridge. |
|
* @requested_mode: requested agp_stat from userspace (Typically from X) |
|
* @bridge_agpstat: current agp_stat from AGP bridge. |
|
* |
|
* This function will hunt for an AGP graphics card, and try to match |
|
* the requested mode to the capabilities of both the bridge and the card. |
|
*/ |
|
u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 requested_mode, u32 bridge_agpstat) |
|
{ |
|
struct pci_dev *device = NULL; |
|
u32 vga_agpstat; |
|
u8 cap_ptr; |
|
|
|
for (;;) { |
|
device = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, device); |
|
if (!device) { |
|
printk(KERN_INFO PFX "Couldn't find an AGP VGA controller.\n"); |
|
return 0; |
|
} |
|
cap_ptr = pci_find_capability(device, PCI_CAP_ID_AGP); |
|
if (cap_ptr) |
|
break; |
|
} |
|
|
|
/* |
|
* 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, &vga_agpstat); |
|
|
|
/* adjust RQ depth */ |
|
bridge_agpstat = ((bridge_agpstat & ~AGPSTAT_RQ_DEPTH) | |
|
min_t(u32, (requested_mode & AGPSTAT_RQ_DEPTH), |
|
min_t(u32, (bridge_agpstat & AGPSTAT_RQ_DEPTH), (vga_agpstat & AGPSTAT_RQ_DEPTH)))); |
|
|
|
/* disable FW if it's not supported */ |
|
if (!((bridge_agpstat & AGPSTAT_FW) && |
|
(vga_agpstat & AGPSTAT_FW) && |
|
(requested_mode & AGPSTAT_FW))) |
|
bridge_agpstat &= ~AGPSTAT_FW; |
|
|
|
/* Check to see if we are operating in 3.0 mode */ |
|
if (agp_bridge->mode & AGPSTAT_MODE_3_0) |
|
agp_v3_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); |
|
else |
|
agp_v2_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); |
|
|
|
pci_dev_put(device); |
|
return bridge_agpstat; |
|
} |
|
EXPORT_SYMBOL(agp_collect_device_status); |
|
|
|
|
|
void agp_device_command(u32 bridge_agpstat, bool agp_v3) |
|
{ |
|
struct pci_dev *device = NULL; |
|
int mode; |
|
|
|
mode = bridge_agpstat & 0x7; |
|
if (agp_v3) |
|
mode *= 4; |
|
|
|
for_each_pci_dev(device) { |
|
u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP); |
|
if (!agp) |
|
continue; |
|
|
|
dev_info(&device->dev, "putting AGP V%d device into %dx mode\n", |
|
agp_v3 ? 3 : 2, mode); |
|
pci_write_config_dword(device, agp + PCI_AGP_COMMAND, bridge_agpstat); |
|
} |
|
} |
|
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 (bridge->major_version != 0) |
|
return; |
|
|
|
pci_read_config_dword(bridge->dev, bridge->capndx, &ncapid); |
|
bridge->major_version = (ncapid >> AGP_MAJOR_VERSION_SHIFT) & 0xf; |
|
bridge->minor_version = (ncapid >> AGP_MINOR_VERSION_SHIFT) & 0xf; |
|
} |
|
EXPORT_SYMBOL(get_agp_version); |
|
|
|
|
|
void agp_generic_enable(struct agp_bridge_data *bridge, u32 requested_mode) |
|
{ |
|
u32 bridge_agpstat, temp; |
|
|
|
get_agp_version(agp_bridge); |
|
|
|
dev_info(&agp_bridge->dev->dev, "AGP %d.%d bridge\n", |
|
agp_bridge->major_version, agp_bridge->minor_version); |
|
|
|
pci_read_config_dword(agp_bridge->dev, |
|
agp_bridge->capndx + PCI_AGP_STATUS, &bridge_agpstat); |
|
|
|
bridge_agpstat = agp_collect_device_status(agp_bridge, requested_mode, bridge_agpstat); |
|
if (bridge_agpstat == 0) |
|
/* Something bad happened. FIXME: Return error code? */ |
|
return; |
|
|
|
bridge_agpstat |= AGPSTAT_AGP_ENABLE; |
|
|
|
/* Do AGP version specific frobbing. */ |
|
if (bridge->major_version >= 3) { |
|
if (bridge->mode & AGPSTAT_MODE_3_0) { |
|
/* If we have 3.5, we can do the isoch stuff. */ |
|
if (bridge->minor_version >= 5) |
|
agp_3_5_enable(bridge); |
|
agp_device_command(bridge_agpstat, true); |
|
return; |
|
} else { |
|
/* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/ |
|
bridge_agpstat &= ~(7<<10) ; |
|
pci_read_config_dword(bridge->dev, |
|
bridge->capndx+AGPCTRL, &temp); |
|
temp |= (1<<9); |
|
pci_write_config_dword(bridge->dev, |
|
bridge->capndx+AGPCTRL, temp); |
|
|
|
dev_info(&bridge->dev->dev, "bridge is in legacy mode, falling back to 2.x\n"); |
|
} |
|
} |
|
|
|
/* AGP v<3 */ |
|
agp_device_command(bridge_agpstat, false); |
|
} |
|
EXPORT_SYMBOL(agp_generic_enable); |
|
|
|
|
|
int agp_generic_create_gatt_table(struct agp_bridge_data *bridge) |
|
{ |
|
char *table; |
|
char *table_end; |
|
int page_order; |
|
int num_entries; |
|
int i; |
|
void *temp; |
|
struct page *page; |
|
|
|
/* The generic routines can't handle 2 level gatt's */ |
|
if (bridge->driver->size_type == LVL2_APER_SIZE) |
|
return -EINVAL; |
|
|
|
table = NULL; |
|
i = bridge->aperture_size_idx; |
|
temp = bridge->current_size; |
|
page_order = num_entries = 0; |
|
|
|
if (bridge->driver->size_type != FIXED_APER_SIZE) { |
|
do { |
|
switch (bridge->driver->size_type) { |
|
case U8_APER_SIZE: |
|
page_order = |
|
A_SIZE_8(temp)->page_order; |
|
num_entries = |
|
A_SIZE_8(temp)->num_entries; |
|
break; |
|
case U16_APER_SIZE: |
|
page_order = A_SIZE_16(temp)->page_order; |
|
num_entries = A_SIZE_16(temp)->num_entries; |
|
break; |
|
case U32_APER_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: |
|
page_order = num_entries = 0; |
|
break; |
|
} |
|
|
|
table = alloc_gatt_pages(page_order); |
|
|
|
if (table == NULL) { |
|
i++; |
|
switch (bridge->driver->size_type) { |
|
case U8_APER_SIZE: |
|
bridge->current_size = A_IDX8(bridge); |
|
break; |
|
case U16_APER_SIZE: |
|
bridge->current_size = A_IDX16(bridge); |
|
break; |
|
case U32_APER_SIZE: |
|
bridge->current_size = A_IDX32(bridge); |
|
break; |
|
/* These cases will never really happen. */ |
|
case FIXED_APER_SIZE: |
|
case LVL2_APER_SIZE: |
|
default: |
|
break; |
|
} |
|
temp = bridge->current_size; |
|
} else { |
|
bridge->aperture_size_idx = i; |
|
} |
|
} while (!table && (i < bridge->driver->num_aperture_sizes)); |
|
} else { |
|
page_order = ((struct aper_size_info_fixed *) temp)->page_order; |
|
num_entries = ((struct aper_size_info_fixed *) temp)->num_entries; |
|
table = alloc_gatt_pages(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); |
|
|
|
bridge->gatt_table_real = (u32 *) table; |
|
agp_gatt_table = (void *)table; |
|
|
|
bridge->driver->cache_flush(); |
|
#ifdef CONFIG_X86 |
|
if (set_memory_uc((unsigned long)table, 1 << page_order)) |
|
printk(KERN_WARNING "Could not set GATT table memory to UC!\n"); |
|
|
|
bridge->gatt_table = (u32 __iomem *)table; |
|
#else |
|
bridge->gatt_table = ioremap(virt_to_phys(table), |
|
(PAGE_SIZE * (1 << page_order))); |
|
bridge->driver->cache_flush(); |
|
#endif |
|
|
|
if (bridge->gatt_table == NULL) { |
|
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) |
|
ClearPageReserved(page); |
|
|
|
free_gatt_pages(table, page_order); |
|
|
|
return -ENOMEM; |
|
} |
|
bridge->gatt_bus_addr = virt_to_phys(bridge->gatt_table_real); |
|
|
|
/* AK: bogus, should encode addresses > 4GB */ |
|
for (i = 0; i < num_entries; i++) { |
|
writel(bridge->scratch_page, bridge->gatt_table+i); |
|
readl(bridge->gatt_table+i); /* PCI Posting. */ |
|
} |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(agp_generic_create_gatt_table); |
|
|
|
int agp_generic_free_gatt_table(struct agp_bridge_data *bridge) |
|
{ |
|
int page_order; |
|
char *table, *table_end; |
|
void *temp; |
|
struct page *page; |
|
|
|
temp = bridge->current_size; |
|
|
|
switch (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; |
|
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. */ |
|
|
|
#ifdef CONFIG_X86 |
|
set_memory_wb((unsigned long)bridge->gatt_table, 1 << page_order); |
|
#else |
|
iounmap(bridge->gatt_table); |
|
#endif |
|
table = (char *) 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_gatt_pages(bridge->gatt_table_real, page_order); |
|
|
|
agp_gatt_table = NULL; |
|
bridge->gatt_table = NULL; |
|
bridge->gatt_table_real = NULL; |
|
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; |
|
struct agp_bridge_data *bridge; |
|
int mask_type; |
|
|
|
bridge = mem->bridge; |
|
if (!bridge) |
|
return -EINVAL; |
|
|
|
if (mem->page_count == 0) |
|
return 0; |
|
|
|
temp = bridge->current_size; |
|
|
|
switch (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; |
|
default: |
|
num_entries = 0; |
|
break; |
|
} |
|
|
|
num_entries -= agp_memory_reserved/PAGE_SIZE; |
|
if (num_entries < 0) num_entries = 0; |
|
|
|
if (type != mem->type) |
|
return -EINVAL; |
|
|
|
mask_type = bridge->driver->agp_type_to_mask_type(bridge, type); |
|
if (mask_type != 0) { |
|
/* The generic routines know nothing of memory types */ |
|
return -EINVAL; |
|
} |
|
|
|
if (((pg_start + mem->page_count) > num_entries) || |
|
((pg_start + mem->page_count) < pg_start)) |
|
return -EINVAL; |
|
|
|
j = pg_start; |
|
|
|
while (j < (pg_start + mem->page_count)) { |
|
if (!PGE_EMPTY(bridge, readl(bridge->gatt_table+j))) |
|
return -EBUSY; |
|
j++; |
|
} |
|
|
|
if (!mem->is_flushed) { |
|
bridge->driver->cache_flush(); |
|
mem->is_flushed = true; |
|
} |
|
|
|
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { |
|
writel(bridge->driver->mask_memory(bridge, |
|
page_to_phys(mem->pages[i]), |
|
mask_type), |
|
bridge->gatt_table+j); |
|
} |
|
readl(bridge->gatt_table+j-1); /* PCI Posting. */ |
|
|
|
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; |
|
struct agp_bridge_data *bridge; |
|
int mask_type, num_entries; |
|
|
|
bridge = mem->bridge; |
|
if (!bridge) |
|
return -EINVAL; |
|
|
|
if (mem->page_count == 0) |
|
return 0; |
|
|
|
if (type != mem->type) |
|
return -EINVAL; |
|
|
|
num_entries = agp_num_entries(); |
|
if (((pg_start + mem->page_count) > num_entries) || |
|
((pg_start + mem->page_count) < pg_start)) |
|
return -EINVAL; |
|
|
|
mask_type = bridge->driver->agp_type_to_mask_type(bridge, type); |
|
if (mask_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(bridge->scratch_page, bridge->gatt_table+i); |
|
} |
|
readl(bridge->gatt_table+i-1); /* PCI Posting. */ |
|
|
|
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) |
|
{ |
|
agp_free_page_array(curr); |
|
agp_free_key(curr->key); |
|
kfree(curr); |
|
} |
|
EXPORT_SYMBOL(agp_generic_free_by_type); |
|
|
|
struct agp_memory *agp_generic_alloc_user(size_t page_count, int type) |
|
{ |
|
struct agp_memory *new; |
|
int i; |
|
int pages; |
|
|
|
pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; |
|
new = agp_create_user_memory(page_count); |
|
if (new == NULL) |
|
return NULL; |
|
|
|
for (i = 0; i < page_count; i++) |
|
new->pages[i] = NULL; |
|
new->page_count = 0; |
|
new->type = type; |
|
new->num_scratch_pages = pages; |
|
|
|
return new; |
|
} |
|
EXPORT_SYMBOL(agp_generic_alloc_user); |
|
|
|
/* |
|
* 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. |
|
*/ |
|
|
|
int agp_generic_alloc_pages(struct agp_bridge_data *bridge, struct agp_memory *mem, size_t num_pages) |
|
{ |
|
struct page * page; |
|
int i, ret = -ENOMEM; |
|
|
|
for (i = 0; i < num_pages; i++) { |
|
page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); |
|
/* agp_free_memory() needs gart address */ |
|
if (page == NULL) |
|
goto out; |
|
|
|
#ifndef CONFIG_X86 |
|
map_page_into_agp(page); |
|
#endif |
|
get_page(page); |
|
atomic_inc(&agp_bridge->current_memory_agp); |
|
|
|
mem->pages[i] = page; |
|
mem->page_count++; |
|
} |
|
|
|
#ifdef CONFIG_X86 |
|
set_pages_array_uc(mem->pages, num_pages); |
|
#endif |
|
ret = 0; |
|
out: |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(agp_generic_alloc_pages); |
|
|
|
struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge) |
|
{ |
|
struct page * page; |
|
|
|
page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); |
|
if (page == NULL) |
|
return NULL; |
|
|
|
map_page_into_agp(page); |
|
|
|
get_page(page); |
|
atomic_inc(&agp_bridge->current_memory_agp); |
|
return page; |
|
} |
|
EXPORT_SYMBOL(agp_generic_alloc_page); |
|
|
|
void agp_generic_destroy_pages(struct agp_memory *mem) |
|
{ |
|
int i; |
|
struct page *page; |
|
|
|
if (!mem) |
|
return; |
|
|
|
#ifdef CONFIG_X86 |
|
set_pages_array_wb(mem->pages, mem->page_count); |
|
#endif |
|
|
|
for (i = 0; i < mem->page_count; i++) { |
|
page = mem->pages[i]; |
|
|
|
#ifndef CONFIG_X86 |
|
unmap_page_from_agp(page); |
|
#endif |
|
put_page(page); |
|
__free_page(page); |
|
atomic_dec(&agp_bridge->current_memory_agp); |
|
mem->pages[i] = NULL; |
|
} |
|
} |
|
EXPORT_SYMBOL(agp_generic_destroy_pages); |
|
|
|
void agp_generic_destroy_page(struct page *page, int flags) |
|
{ |
|
if (page == NULL) |
|
return; |
|
|
|
if (flags & AGP_PAGE_DESTROY_UNMAP) |
|
unmap_page_from_agp(page); |
|
|
|
if (flags & AGP_PAGE_DESTROY_FREE) { |
|
put_page(page); |
|
__free_page(page); |
|
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. |
|
* |
|
* @bridge: an agp_bridge_data struct allocated for the AGP host bridge. |
|
* @mode: agp mode register value to configure with. |
|
*/ |
|
void agp_enable(struct agp_bridge_data *bridge, u32 mode) |
|
{ |
|
if (!bridge) |
|
return; |
|
bridge->driver->agp_enable(bridge, mode); |
|
} |
|
EXPORT_SYMBOL(agp_enable); |
|
|
|
/* When we remove the global variable agp_bridge from all drivers |
|
* then agp_alloc_bridge and agp_generic_find_bridge need to be updated |
|
*/ |
|
|
|
struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev) |
|
{ |
|
if (list_empty(&agp_bridges)) |
|
return NULL; |
|
|
|
return agp_bridge; |
|
} |
|
|
|
static void ipi_handler(void *null) |
|
{ |
|
flush_agp_cache(); |
|
} |
|
|
|
void global_cache_flush(void) |
|
{ |
|
on_each_cpu(ipi_handler, NULL, 1); |
|
} |
|
EXPORT_SYMBOL(global_cache_flush); |
|
|
|
unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge, |
|
dma_addr_t addr, int type) |
|
{ |
|
/* memory type is ignored in the generic routine */ |
|
if (bridge->driver->masks) |
|
return addr | bridge->driver->masks[0].mask; |
|
else |
|
return addr; |
|
} |
|
EXPORT_SYMBOL(agp_generic_mask_memory); |
|
|
|
int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge, |
|
int type) |
|
{ |
|
if (type >= AGP_USER_TYPES) |
|
return 0; |
|
return type; |
|
} |
|
EXPORT_SYMBOL(agp_generic_type_to_mask_type); |
|
|
|
/* |
|
* 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); |
|
|
|
agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev, |
|
AGP_APERTURE_BAR); |
|
|
|
/* 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); |
|
|
|
const 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); |
|
|
|
|