3 * Copyright (C) 2002-2004 Dave Jones.
4 * Copyright (C) 1999 Jeff Hartmann.
5 * Copyright (C) 1999 Precision Insight, Inc.
6 * Copyright (C) 1999 Xi Graphics, Inc.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
24 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 * - Allocate more than order 0 pages to avoid too much linear map splitting.
29 #include <linux/config.h>
30 #include <linux/module.h>
31 #include <linux/pci.h>
32 #include <linux/init.h>
33 #include <linux/pagemap.h>
34 #include <linux/miscdevice.h>
36 #include <linux/agp_backend.h>
37 #include <linux/vmalloc.h>
41 __u32
*agp_gatt_table
;
42 int agp_memory_reserved
;
45 * Needed by the Nforce GART driver for the time being. Would be
46 * nice to do this some other way instead of needing this export.
48 EXPORT_SYMBOL_GPL(agp_memory_reserved
);
51 * Generic routines for handling agp_memory structures -
52 * They use the basic page allocation routines to do the brunt of the work.
55 void agp_free_key(int key
)
61 clear_bit(key
, agp_bridge
->key_list
);
63 EXPORT_SYMBOL(agp_free_key
);
66 static int agp_get_key(void)
70 bit
= find_first_zero_bit(agp_bridge
->key_list
, MAXKEY
);
72 set_bit(bit
, agp_bridge
->key_list
);
79 struct agp_memory
*agp_create_memory(int scratch_pages
)
81 struct agp_memory
*new;
83 new = kmalloc(sizeof(struct agp_memory
), GFP_KERNEL
);
88 memset(new, 0, sizeof(struct agp_memory
));
89 new->key
= agp_get_key();
95 new->memory
= vmalloc(PAGE_SIZE
* scratch_pages
);
97 if (new->memory
== NULL
) {
98 agp_free_key(new->key
);
102 new->num_scratch_pages
= scratch_pages
;
105 EXPORT_SYMBOL(agp_create_memory
);
108 * agp_free_memory - free memory associated with an agp_memory pointer.
110 * @curr: agp_memory pointer to be freed.
112 * It is the only function that can be called when the backend is not owned
113 * by the caller. (So it can free memory on client death.)
115 void agp_free_memory(struct agp_memory
*curr
)
119 if ((agp_bridge
->type
== NOT_SUPPORTED
) || (curr
== NULL
))
122 if (curr
->is_bound
== TRUE
)
123 agp_unbind_memory(curr
);
125 if (curr
->type
!= 0) {
126 agp_bridge
->driver
->free_by_type(curr
);
129 if (curr
->page_count
!= 0) {
130 for (i
= 0; i
< curr
->page_count
; i
++) {
131 agp_bridge
->driver
->agp_destroy_page(phys_to_virt(curr
->memory
[i
]));
134 agp_free_key(curr
->key
);
138 EXPORT_SYMBOL(agp_free_memory
);
140 #define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long))
143 * agp_allocate_memory - allocate a group of pages of a certain type.
145 * @page_count: size_t argument of the number of pages
146 * @type: u32 argument of the type of memory to be allocated.
148 * Every agp bridge device will allow you to allocate AGP_NORMAL_MEMORY which
149 * maps to physical ram. Any other type is device dependent.
151 * It returns NULL whenever memory is unavailable.
153 struct agp_memory
*agp_allocate_memory(size_t page_count
, u32 type
)
156 struct agp_memory
*new;
159 if (agp_bridge
->type
== NOT_SUPPORTED
)
162 if ((atomic_read(&agp_bridge
->current_memory_agp
) + page_count
) > agp_bridge
->max_memory_agp
)
166 new = agp_bridge
->driver
->alloc_by_type(page_count
, type
);
170 scratch_pages
= (page_count
+ ENTRIES_PER_PAGE
- 1) / ENTRIES_PER_PAGE
;
172 new = agp_create_memory(scratch_pages
);
177 for (i
= 0; i
< page_count
; i
++) {
178 void *addr
= agp_bridge
->driver
->agp_alloc_page();
181 agp_free_memory(new);
185 agp_bridge
->driver
->mask_memory(virt_to_phys(addr
), type
);
189 flush_agp_mappings();
193 EXPORT_SYMBOL(agp_allocate_memory
);
196 /* End - Generic routines for handling agp_memory structures */
199 static int agp_return_size(void)
204 temp
= agp_bridge
->current_size
;
206 switch (agp_bridge
->driver
->size_type
) {
208 current_size
= A_SIZE_8(temp
)->size
;
211 current_size
= A_SIZE_16(temp
)->size
;
214 current_size
= A_SIZE_32(temp
)->size
;
217 current_size
= A_SIZE_LVL2(temp
)->size
;
219 case FIXED_APER_SIZE
:
220 current_size
= A_SIZE_FIX(temp
)->size
;
227 current_size
-= (agp_memory_reserved
/ (1024*1024));
234 int agp_num_entries(void)
239 temp
= agp_bridge
->current_size
;
241 switch (agp_bridge
->driver
->size_type
) {
243 num_entries
= A_SIZE_8(temp
)->num_entries
;
246 num_entries
= A_SIZE_16(temp
)->num_entries
;
249 num_entries
= A_SIZE_32(temp
)->num_entries
;
252 num_entries
= A_SIZE_LVL2(temp
)->num_entries
;
254 case FIXED_APER_SIZE
:
255 num_entries
= A_SIZE_FIX(temp
)->num_entries
;
262 num_entries
-= agp_memory_reserved
>>PAGE_SHIFT
;
267 EXPORT_SYMBOL_GPL(agp_num_entries
);
271 * agp_copy_info - copy bridge state information
273 * @info: agp_kern_info pointer. The caller should insure that this pointer is valid.
275 * This function copies information about the agp bridge device and the state of
276 * the agp backend into an agp_kern_info pointer.
278 int agp_copy_info(struct agp_kern_info
*info
)
280 memset(info
, 0, sizeof(struct agp_kern_info
));
281 if (!agp_bridge
|| agp_bridge
->type
== NOT_SUPPORTED
||
282 !agp_bridge
->version
) {
283 info
->chipset
= NOT_SUPPORTED
;
287 info
->version
.major
= agp_bridge
->version
->major
;
288 info
->version
.minor
= agp_bridge
->version
->minor
;
289 info
->chipset
= agp_bridge
->type
;
290 info
->device
= agp_bridge
->dev
;
291 info
->mode
= agp_bridge
->mode
;
292 info
->aper_base
= agp_bridge
->gart_bus_addr
;
293 info
->aper_size
= agp_return_size();
294 info
->max_memory
= agp_bridge
->max_memory_agp
;
295 info
->current_memory
= atomic_read(&agp_bridge
->current_memory_agp
);
296 info
->cant_use_aperture
= agp_bridge
->driver
->cant_use_aperture
;
297 info
->vm_ops
= agp_bridge
->vm_ops
;
298 info
->page_mask
= ~0UL;
301 EXPORT_SYMBOL(agp_copy_info
);
304 /* End - Routine to copy over information structure */
308 * Routines for handling swapping of agp_memory into the GATT -
309 * These routines take agp_memory and insert them into the GATT.
310 * They call device specific routines to actually write to the GATT.
314 * agp_bind_memory - Bind an agp_memory structure into the GATT.
316 * @curr: agp_memory pointer
317 * @pg_start: an offset into the graphics aperture translation table
319 * It returns -EINVAL if the pointer == NULL.
320 * It returns -EBUSY if the area of the table requested is already in use.
322 int agp_bind_memory(struct agp_memory
*curr
, off_t pg_start
)
326 if ((agp_bridge
->type
== NOT_SUPPORTED
) || (curr
== NULL
))
329 if (curr
->is_bound
== TRUE
) {
330 printk (KERN_INFO PFX
"memory %p is already bound!\n", curr
);
333 if (curr
->is_flushed
== FALSE
) {
334 agp_bridge
->driver
->cache_flush();
335 curr
->is_flushed
= TRUE
;
337 ret_val
= agp_bridge
->driver
->insert_memory(curr
, pg_start
, curr
->type
);
342 curr
->is_bound
= TRUE
;
343 curr
->pg_start
= pg_start
;
346 EXPORT_SYMBOL(agp_bind_memory
);
350 * agp_unbind_memory - Removes an agp_memory structure from the GATT
352 * @curr: agp_memory pointer to be removed from the GATT.
354 * It returns -EINVAL if this piece of agp_memory is not currently bound to
355 * the graphics aperture translation table or if the agp_memory pointer == NULL
357 int agp_unbind_memory(struct agp_memory
*curr
)
361 if ((agp_bridge
->type
== NOT_SUPPORTED
) || (curr
== NULL
))
364 if (curr
->is_bound
!= TRUE
) {
365 printk (KERN_INFO PFX
"memory %p was not bound!\n", curr
);
369 ret_val
= agp_bridge
->driver
->remove_memory(curr
, curr
->pg_start
, curr
->type
);
374 curr
->is_bound
= FALSE
;
378 EXPORT_SYMBOL(agp_unbind_memory
);
380 /* End - Routines for handling swapping of agp_memory into the GATT */
383 /* Generic Agp routines - Start */
384 static void agp_v2_parse_one(u32
*mode
, u32
*cmd
, u32
*tmp
)
386 /* disable SBA if it's not supported */
387 if (!((*cmd
& AGPSTAT_SBA
) && (*tmp
& AGPSTAT_SBA
) && (*mode
& AGPSTAT_SBA
)))
388 *cmd
&= ~AGPSTAT_SBA
;
391 if (!((*cmd
& AGPSTAT2_4X
) && (*tmp
& AGPSTAT2_4X
) && (*mode
& AGPSTAT2_4X
)))
392 *cmd
&= ~AGPSTAT2_4X
;
394 if (!((*cmd
& AGPSTAT2_2X
) && (*tmp
& AGPSTAT2_2X
) && (*mode
& AGPSTAT2_2X
)))
395 *cmd
&= ~AGPSTAT2_2X
;
397 if (!((*cmd
& AGPSTAT2_1X
) && (*tmp
& AGPSTAT2_1X
) && (*mode
& AGPSTAT2_1X
)))
398 *cmd
&= ~AGPSTAT2_1X
;
400 /* Now we know what mode it should be, clear out the unwanted bits. */
401 if (*cmd
& AGPSTAT2_4X
)
402 *cmd
&= ~(AGPSTAT2_1X
| AGPSTAT2_2X
); /* 4X */
404 if (*cmd
& AGPSTAT2_2X
)
405 *cmd
&= ~(AGPSTAT2_1X
| AGPSTAT2_4X
); /* 2X */
407 if (*cmd
& AGPSTAT2_1X
)
408 *cmd
&= ~(AGPSTAT2_2X
| AGPSTAT2_4X
); /* 1X */
412 * mode = requested mode.
413 * cmd = PCI_AGP_STATUS from agp bridge.
414 * tmp = PCI_AGP_STATUS from graphic card.
416 static void agp_v3_parse_one(u32
*mode
, u32
*cmd
, u32
*tmp
)
418 u32 origcmd
=*cmd
, origtmp
=*tmp
;
420 /* ARQSZ - Set the value to the maximum one.
421 * Don't allow the mode register to override values. */
422 *cmd
= ((*cmd
& ~AGPSTAT_ARQSZ
) |
423 max_t(u32
,(*cmd
& AGPSTAT_ARQSZ
),(*tmp
& AGPSTAT_ARQSZ
)));
425 /* Calibration cycle.
426 * Don't allow the mode register to override values. */
427 *cmd
= ((*cmd
& ~AGPSTAT_CAL_MASK
) |
428 min_t(u32
,(*cmd
& AGPSTAT_CAL_MASK
),(*tmp
& AGPSTAT_CAL_MASK
)));
430 /* SBA *must* be supported for AGP v3 */
435 * Check for invalid speeds. This can happen when applications
436 * written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware
438 if (*mode
& AGPSTAT_MODE_3_0
) {
440 * Caller hasn't a clue what its doing. We are in 3.0 mode,
441 * have been passed a 3.0 mode, but with 2.x speed bits set.
442 * AGP2.x 4x -> AGP3.0 4x.
444 if (*mode
& AGPSTAT2_4X
) {
445 printk (KERN_INFO PFX
"%s passes broken AGP3 flags (%x). Fixed.\n",
446 current
->comm
, *mode
);
447 *mode
&= ~AGPSTAT2_4X
;
448 *mode
|= AGPSTAT3_4X
;
452 * The caller doesn't know what they are doing. We are in 3.0 mode,
453 * but have been passed an AGP 2.x mode.
454 * Convert AGP 1x,2x,4x -> AGP 3.0 4x.
456 printk (KERN_INFO PFX
"%s passes broken AGP2 flags (%x) in AGP3 mode. Fixed.\n",
457 current
->comm
, *mode
);
458 *mode
&= ~(AGPSTAT2_4X
| AGPSTAT2_2X
| AGPSTAT2_1X
);
459 *mode
|= AGPSTAT3_4X
;
462 if (*mode
& AGPSTAT3_8X
) {
463 if (!(*cmd
& AGPSTAT3_8X
)) {
464 *cmd
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
466 printk ("%s requested AGPx8 but bridge not capable.\n", current
->comm
);
469 if (!(*tmp
& AGPSTAT3_8X
)) {
470 *cmd
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
472 printk ("%s requested AGPx8 but graphic card not capable.\n", current
->comm
);
475 /* All set, bridge & device can do AGP x8*/
476 *cmd
&= ~(AGPSTAT3_4X
| AGPSTAT3_RSVD
);
482 * If we didn't specify AGPx8, we can only do x4.
483 * If the hardware can't do x4, we're up shit creek, and never
484 * should have got this far.
486 *cmd
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
487 if ((*cmd
& AGPSTAT3_4X
) && (*tmp
& AGPSTAT3_4X
))
490 printk (KERN_INFO PFX
"Badness. Don't know which AGP mode to set. "
491 "[cmd:%x tmp:%x fell back to:- cmd:%x tmp:%x]\n",
492 origcmd
, origtmp
, *cmd
, *tmp
);
493 if (!(*cmd
& AGPSTAT3_4X
))
494 printk (KERN_INFO PFX
"Bridge couldn't do AGP x4.\n");
495 if (!(*tmp
& AGPSTAT3_4X
))
496 printk (KERN_INFO PFX
"Graphic card couldn't do AGP x4.\n");
501 //FIXME: This doesn't smell right.
502 //We need a function we pass an agp_device to.
503 u32
agp_collect_device_status(u32 mode
, u32 cmd
)
505 struct pci_dev
*device
= NULL
;
510 while ((device
= pci_find_device(PCI_ANY_ID
, PCI_ANY_ID
, device
)) != NULL
) {
511 cap_ptr
= pci_find_capability(device
, PCI_CAP_ID_AGP
);
515 //FIXME: We should probably skip anything here that
516 // isn't an AGP graphic card.
518 * Ok, here we have a AGP device. Disable impossible
519 * settings, and adjust the readqueue to the minimum.
521 pci_read_config_dword(device
, cap_ptr
+PCI_AGP_STATUS
, &tmp
);
523 /* adjust RQ depth */
524 cmd
= ((cmd
& ~AGPSTAT_RQ_DEPTH
) |
525 min_t(u32
, (mode
& AGPSTAT_RQ_DEPTH
),
526 min_t(u32
, (cmd
& AGPSTAT_RQ_DEPTH
), (tmp
& AGPSTAT_RQ_DEPTH
))));
528 /* disable FW if it's not supported */
529 if (!((cmd
& AGPSTAT_FW
) && (tmp
& AGPSTAT_FW
) && (mode
& AGPSTAT_FW
)))
532 /* Check to see if we are operating in 3.0 mode */
533 pci_read_config_dword(device
, cap_ptr
+AGPSTAT
, &agp3
);
534 if (agp3
& AGPSTAT_MODE_3_0
) {
535 agp_v3_parse_one(&mode
, &cmd
, &tmp
);
537 agp_v2_parse_one(&mode
, &cmd
, &tmp
);
542 EXPORT_SYMBOL(agp_collect_device_status
);
545 void agp_device_command(u32 command
, int agp_v3
)
547 struct pci_dev
*device
= NULL
;
550 mode
= command
& 0x7;
554 while ((device
= pci_find_device(PCI_ANY_ID
, PCI_ANY_ID
, device
)) != NULL
) {
555 u8 agp
= pci_find_capability(device
, PCI_CAP_ID_AGP
);
559 printk(KERN_INFO PFX
"Putting AGP V%d device at %s into %dx mode\n",
560 agp_v3
? 3 : 2, pci_name(device
), mode
);
561 pci_write_config_dword(device
, agp
+ PCI_AGP_COMMAND
, command
);
564 EXPORT_SYMBOL(agp_device_command
);
567 void get_agp_version(struct agp_bridge_data
*bridge
)
571 /* Exit early if already set by errata workarounds. */
572 if (agp_bridge
->major_version
!= 0)
575 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
, &ncapid
);
576 agp_bridge
->major_version
= (ncapid
>> AGP_MAJOR_VERSION_SHIFT
) & 0xf;
577 agp_bridge
->minor_version
= (ncapid
>> AGP_MINOR_VERSION_SHIFT
) & 0xf;
579 EXPORT_SYMBOL(get_agp_version
);
582 void agp_generic_enable(u32 mode
)
587 get_agp_version(agp_bridge
);
589 printk(KERN_INFO PFX
"Found an AGP %d.%d compliant device at %s.\n",
590 agp_bridge
->major_version
,
591 agp_bridge
->minor_version
,
592 agp_bridge
->dev
->slot_name
);
594 pci_read_config_dword(agp_bridge
->dev
,
595 agp_bridge
->capndx
+ PCI_AGP_STATUS
, &command
);
597 command
= agp_collect_device_status(mode
, command
);
598 command
|= AGPSTAT_AGP_ENABLE
;
600 /* Do AGP version specific frobbing. */
601 if(agp_bridge
->major_version
>= 3) {
602 pci_read_config_dword(agp_bridge
->dev
,
603 agp_bridge
->capndx
+AGPSTAT
, &agp3
);
605 /* Check to see if we are operating in 3.0 mode */
606 if (agp3
& AGPSTAT_MODE_3_0
) {
607 /* If we have 3.5, we can do the isoch stuff. */
608 if (agp_bridge
->minor_version
>= 5)
609 agp_3_5_enable(agp_bridge
);
610 agp_device_command(command
, TRUE
);
613 /* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/
614 command
&= ~(7<<10) ;
615 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, &temp
);
617 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, temp
);
619 printk (KERN_INFO PFX
"Device is in legacy mode,"
620 " falling back to 2.x\n");
625 agp_device_command(command
, FALSE
);
627 EXPORT_SYMBOL(agp_generic_enable
);
630 int agp_generic_create_gatt_table(void)
641 /* The generic routines can't handle 2 level gatt's */
642 if (agp_bridge
->driver
->size_type
== LVL2_APER_SIZE
)
646 i
= agp_bridge
->aperture_size_idx
;
647 temp
= agp_bridge
->current_size
;
648 size
= page_order
= num_entries
= 0;
650 if (agp_bridge
->driver
->size_type
!= FIXED_APER_SIZE
) {
652 switch (agp_bridge
->driver
->size_type
) {
654 size
= A_SIZE_8(temp
)->size
;
656 A_SIZE_8(temp
)->page_order
;
658 A_SIZE_8(temp
)->num_entries
;
661 size
= A_SIZE_16(temp
)->size
;
662 page_order
= A_SIZE_16(temp
)->page_order
;
663 num_entries
= A_SIZE_16(temp
)->num_entries
;
666 size
= A_SIZE_32(temp
)->size
;
667 page_order
= A_SIZE_32(temp
)->page_order
;
668 num_entries
= A_SIZE_32(temp
)->num_entries
;
670 /* This case will never really happen. */
671 case FIXED_APER_SIZE
:
674 size
= page_order
= num_entries
= 0;
678 table
= (char *) __get_free_pages(GFP_KERNEL
,
683 switch (agp_bridge
->driver
->size_type
) {
685 agp_bridge
->current_size
= A_IDX8(agp_bridge
);
688 agp_bridge
->current_size
= A_IDX16(agp_bridge
);
691 agp_bridge
->current_size
= A_IDX32(agp_bridge
);
693 /* This case will never really happen. */
694 case FIXED_APER_SIZE
:
697 agp_bridge
->current_size
=
698 agp_bridge
->current_size
;
701 temp
= agp_bridge
->current_size
;
703 agp_bridge
->aperture_size_idx
= i
;
705 } while (!table
&& (i
< agp_bridge
->driver
->num_aperture_sizes
));
707 size
= ((struct aper_size_info_fixed
*) temp
)->size
;
708 page_order
= ((struct aper_size_info_fixed
*) temp
)->page_order
;
709 num_entries
= ((struct aper_size_info_fixed
*) temp
)->num_entries
;
710 table
= (char *) __get_free_pages(GFP_KERNEL
, page_order
);
716 table_end
= table
+ ((PAGE_SIZE
* (1 << page_order
)) - 1);
718 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
719 SetPageReserved(page
);
721 agp_bridge
->gatt_table_real
= (u32
*) table
;
722 agp_gatt_table
= (void *)table
;
724 agp_bridge
->driver
->cache_flush();
725 agp_bridge
->gatt_table
= ioremap_nocache(virt_to_phys(table
),
726 (PAGE_SIZE
* (1 << page_order
)));
727 agp_bridge
->driver
->cache_flush();
729 if (agp_bridge
->gatt_table
== NULL
) {
730 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
731 ClearPageReserved(page
);
733 free_pages((unsigned long) table
, page_order
);
737 agp_bridge
->gatt_bus_addr
= virt_to_phys(agp_bridge
->gatt_table_real
);
739 /* AK: bogus, should encode addresses > 4GB */
740 for (i
= 0; i
< num_entries
; i
++)
741 writel(agp_bridge
->scratch_page
, agp_bridge
->gatt_table
+i
);
745 EXPORT_SYMBOL(agp_generic_create_gatt_table
);
747 int agp_generic_free_gatt_table(void)
750 char *table
, *table_end
;
754 temp
= agp_bridge
->current_size
;
756 switch (agp_bridge
->driver
->size_type
) {
758 page_order
= A_SIZE_8(temp
)->page_order
;
761 page_order
= A_SIZE_16(temp
)->page_order
;
764 page_order
= A_SIZE_32(temp
)->page_order
;
766 case FIXED_APER_SIZE
:
767 page_order
= A_SIZE_FIX(temp
)->page_order
;
770 /* The generic routines can't deal with 2 level gatt's */
778 /* Do not worry about freeing memory, because if this is
779 * called, then all agp memory is deallocated and removed
782 iounmap(agp_bridge
->gatt_table
);
783 table
= (char *) agp_bridge
->gatt_table_real
;
784 table_end
= table
+ ((PAGE_SIZE
* (1 << page_order
)) - 1);
786 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
787 ClearPageReserved(page
);
789 free_pages((unsigned long) agp_bridge
->gatt_table_real
, page_order
);
791 agp_gatt_table
= NULL
;
792 agp_bridge
->gatt_table
= NULL
;
793 agp_bridge
->gatt_table_real
= NULL
;
794 agp_bridge
->gatt_bus_addr
= 0;
798 EXPORT_SYMBOL(agp_generic_free_gatt_table
);
801 int agp_generic_insert_memory(struct agp_memory
* mem
, off_t pg_start
, int type
)
808 temp
= agp_bridge
->current_size
;
810 switch (agp_bridge
->driver
->size_type
) {
812 num_entries
= A_SIZE_8(temp
)->num_entries
;
815 num_entries
= A_SIZE_16(temp
)->num_entries
;
818 num_entries
= A_SIZE_32(temp
)->num_entries
;
820 case FIXED_APER_SIZE
:
821 num_entries
= A_SIZE_FIX(temp
)->num_entries
;
824 /* The generic routines can't deal with 2 level gatt's */
832 num_entries
-= agp_memory_reserved
/PAGE_SIZE
;
833 if (num_entries
< 0) num_entries
= 0;
835 if (type
!= 0 || mem
->type
!= 0) {
836 /* The generic routines know nothing of memory types */
841 if ((pg_start
+ mem
->page_count
) > num_entries
)
846 while (j
< (pg_start
+ mem
->page_count
)) {
847 if (!PGE_EMPTY(agp_bridge
, readl(agp_bridge
->gatt_table
+j
)))
852 if (mem
->is_flushed
== FALSE
) {
853 agp_bridge
->driver
->cache_flush();
854 mem
->is_flushed
= TRUE
;
857 for (i
= 0, j
= pg_start
; i
< mem
->page_count
; i
++, j
++)
858 writel(agp_bridge
->driver
->mask_memory(mem
->memory
[i
], mem
->type
), agp_bridge
->gatt_table
+j
);
860 agp_bridge
->driver
->tlb_flush(mem
);
863 EXPORT_SYMBOL(agp_generic_insert_memory
);
866 int agp_generic_remove_memory(struct agp_memory
*mem
, off_t pg_start
, int type
)
870 if (type
!= 0 || mem
->type
!= 0) {
871 /* The generic routines know nothing of memory types */
875 /* AK: bogus, should encode addresses > 4GB */
876 for (i
= pg_start
; i
< (mem
->page_count
+ pg_start
); i
++)
877 writel(agp_bridge
->scratch_page
, agp_bridge
->gatt_table
+i
);
879 agp_bridge
->driver
->tlb_flush(mem
);
882 EXPORT_SYMBOL(agp_generic_remove_memory
);
885 struct agp_memory
*agp_generic_alloc_by_type(size_t page_count
, int type
)
889 EXPORT_SYMBOL(agp_generic_alloc_by_type
);
892 void agp_generic_free_by_type(struct agp_memory
*curr
)
894 if (curr
->memory
!= NULL
)
897 agp_free_key(curr
->key
);
900 EXPORT_SYMBOL(agp_generic_free_by_type
);
904 * Basic Page Allocation Routines -
905 * These routines handle page allocation and by default they reserve the allocated
906 * memory. They also handle incrementing the current_memory_agp value, Which is checked
907 * against a maximum value.
910 void *agp_generic_alloc_page(void)
914 page
= alloc_page(GFP_KERNEL
);
918 map_page_into_agp(page
);
922 atomic_inc(&agp_bridge
->current_memory_agp
);
923 return page_address(page
);
925 EXPORT_SYMBOL(agp_generic_alloc_page
);
928 void agp_generic_destroy_page(void *addr
)
935 page
= virt_to_page(addr
);
936 unmap_page_from_agp(page
);
939 free_page((unsigned long)addr
);
940 atomic_dec(&agp_bridge
->current_memory_agp
);
942 EXPORT_SYMBOL(agp_generic_destroy_page
);
944 /* End Basic Page Allocation Routines */
948 * agp_enable - initialise the agp point-to-point connection.
950 * @mode: agp mode register value to configure with.
952 void agp_enable(u32 mode
)
954 if (agp_bridge
->type
== NOT_SUPPORTED
)
956 agp_bridge
->driver
->agp_enable(mode
);
958 EXPORT_SYMBOL(agp_enable
);
962 static void ipi_handler(void *null
)
968 void global_cache_flush(void)
971 if (on_each_cpu(ipi_handler
, NULL
, 1, 1) != 0)
972 panic(PFX
"timed out waiting for the other CPUs!\n");
977 EXPORT_SYMBOL(global_cache_flush
);
979 unsigned long agp_generic_mask_memory(unsigned long addr
, int type
)
981 /* memory type is ignored in the generic routine */
982 if (agp_bridge
->driver
->masks
)
983 return addr
| agp_bridge
->driver
->masks
[0].mask
;
987 EXPORT_SYMBOL(agp_generic_mask_memory
);
990 * These functions are implemented according to the AGPv3 spec,
991 * which covers implementation details that had previously been
995 int agp3_generic_fetch_size(void)
999 struct aper_size_info_16
*values
;
1001 pci_read_config_word(agp_bridge
->dev
, agp_bridge
->capndx
+AGPAPSIZE
, &temp_size
);
1002 values
= A_SIZE_16(agp_bridge
->driver
->aperture_sizes
);
1004 for (i
= 0; i
< agp_bridge
->driver
->num_aperture_sizes
; i
++) {
1005 if (temp_size
== values
[i
].size_value
) {
1006 agp_bridge
->previous_size
=
1007 agp_bridge
->current_size
= (void *) (values
+ i
);
1009 agp_bridge
->aperture_size_idx
= i
;
1010 return values
[i
].size
;
1015 EXPORT_SYMBOL(agp3_generic_fetch_size
);
1017 void agp3_generic_tlbflush(struct agp_memory
*mem
)
1020 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, &ctrl
);
1021 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, ctrl
& ~AGPCTRL_GTLBEN
);
1022 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, ctrl
);
1024 EXPORT_SYMBOL(agp3_generic_tlbflush
);
1026 int agp3_generic_configure(void)
1029 struct aper_size_info_16
*current_size
;
1031 current_size
= A_SIZE_16(agp_bridge
->current_size
);
1033 pci_read_config_dword(agp_bridge
->dev
, AGP_APBASE
, &temp
);
1034 agp_bridge
->gart_bus_addr
= (temp
& PCI_BASE_ADDRESS_MEM_MASK
);
1036 /* set aperture size */
1037 pci_write_config_word(agp_bridge
->dev
, agp_bridge
->capndx
+AGPAPSIZE
, current_size
->size_value
);
1038 /* set gart pointer */
1039 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPGARTLO
, agp_bridge
->gatt_bus_addr
);
1040 /* enable aperture and GTLB */
1041 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, &temp
);
1042 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, temp
| AGPCTRL_APERENB
| AGPCTRL_GTLBEN
);
1045 EXPORT_SYMBOL(agp3_generic_configure
);
1047 void agp3_generic_cleanup(void)
1050 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, &ctrl
);
1051 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, ctrl
& ~AGPCTRL_APERENB
);
1053 EXPORT_SYMBOL(agp3_generic_cleanup
);
1055 struct aper_size_info_16 agp3_generic_sizes
[AGP_GENERIC_SIZES_ENTRIES
] =
1057 {4096, 1048576, 10,0x000},
1058 {2048, 524288, 9, 0x800},
1059 {1024, 262144, 8, 0xc00},
1060 { 512, 131072, 7, 0xe00},
1061 { 256, 65536, 6, 0xf00},
1062 { 128, 32768, 5, 0xf20},
1063 { 64, 16384, 4, 0xf30},
1064 { 32, 8192, 3, 0xf38},
1065 { 16, 4096, 2, 0xf3c},
1066 { 8, 2048, 1, 0xf3e},
1067 { 4, 1024, 0, 0xf3f}
1069 EXPORT_SYMBOL(agp3_generic_sizes
);