3 * Copyright (C) 2004 Silicon Graphics, Inc.
4 * Copyright (C) 2002-2005 Dave Jones.
5 * Copyright (C) 1999 Jeff Hartmann.
6 * Copyright (C) 1999 Precision Insight, Inc.
7 * Copyright (C) 1999 Xi Graphics, Inc.
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
25 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * - Allocate more than order 0 pages to avoid too much linear map splitting.
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>
38 #include <linux/dma-mapping.h>
40 #include <linux/sched.h>
42 #include <asm/cacheflush.h>
43 #include <asm/pgtable.h>
46 __u32
*agp_gatt_table
;
47 int agp_memory_reserved
;
50 * Needed by the Nforce GART driver for the time being. Would be
51 * nice to do this some other way instead of needing this export.
53 EXPORT_SYMBOL_GPL(agp_memory_reserved
);
56 * Generic routines for handling agp_memory structures -
57 * They use the basic page allocation routines to do the brunt of the work.
60 void agp_free_key(int key
)
66 clear_bit(key
, agp_bridge
->key_list
);
68 EXPORT_SYMBOL(agp_free_key
);
71 static int agp_get_key(void)
75 bit
= find_first_zero_bit(agp_bridge
->key_list
, MAXKEY
);
77 set_bit(bit
, agp_bridge
->key_list
);
83 void agp_flush_chipset(struct agp_bridge_data
*bridge
)
85 if (bridge
->driver
->chipset_flush
)
86 bridge
->driver
->chipset_flush(bridge
);
88 EXPORT_SYMBOL(agp_flush_chipset
);
91 * Use kmalloc if possible for the page list. Otherwise fall back to
92 * vmalloc. This speeds things up and also saves memory for small AGP
96 void agp_alloc_page_array(size_t size
, struct agp_memory
*mem
)
99 mem
->vmalloc_flag
= false;
101 if (size
<= 2*PAGE_SIZE
)
102 mem
->memory
= kmalloc(size
, GFP_KERNEL
| __GFP_NORETRY
);
103 if (mem
->memory
== NULL
) {
104 mem
->memory
= vmalloc(size
);
105 mem
->vmalloc_flag
= true;
108 EXPORT_SYMBOL(agp_alloc_page_array
);
110 void agp_free_page_array(struct agp_memory
*mem
)
112 if (mem
->vmalloc_flag
) {
118 EXPORT_SYMBOL(agp_free_page_array
);
121 static struct agp_memory
*agp_create_user_memory(unsigned long num_agp_pages
)
123 struct agp_memory
*new;
124 unsigned long alloc_size
= num_agp_pages
*sizeof(struct page
*);
126 new = kzalloc(sizeof(struct agp_memory
), GFP_KERNEL
);
130 new->key
= agp_get_key();
137 agp_alloc_page_array(alloc_size
, new);
139 if (new->memory
== NULL
) {
140 agp_free_key(new->key
);
144 new->num_scratch_pages
= 0;
148 struct agp_memory
*agp_create_memory(int scratch_pages
)
150 struct agp_memory
*new;
152 new = kzalloc(sizeof(struct agp_memory
), GFP_KERNEL
);
156 new->key
= agp_get_key();
163 agp_alloc_page_array(PAGE_SIZE
* scratch_pages
, new);
165 if (new->memory
== NULL
) {
166 agp_free_key(new->key
);
170 new->num_scratch_pages
= scratch_pages
;
171 new->type
= AGP_NORMAL_MEMORY
;
174 EXPORT_SYMBOL(agp_create_memory
);
177 * agp_free_memory - free memory associated with an agp_memory pointer.
179 * @curr: agp_memory pointer to be freed.
181 * It is the only function that can be called when the backend is not owned
182 * by the caller. (So it can free memory on client death.)
184 void agp_free_memory(struct agp_memory
*curr
)
192 agp_unbind_memory(curr
);
194 if (curr
->type
>= AGP_USER_TYPES
) {
195 agp_generic_free_by_type(curr
);
199 if (curr
->type
!= 0) {
200 curr
->bridge
->driver
->free_by_type(curr
);
203 if (curr
->page_count
!= 0) {
204 for (i
= 0; i
< curr
->page_count
; i
++) {
205 curr
->memory
[i
] = (unsigned long)gart_to_virt(curr
->memory
[i
]);
206 curr
->bridge
->driver
->agp_destroy_page((void *)curr
->memory
[i
],
207 AGP_PAGE_DESTROY_UNMAP
);
209 for (i
= 0; i
< curr
->page_count
; i
++) {
210 curr
->bridge
->driver
->agp_destroy_page((void *)curr
->memory
[i
],
211 AGP_PAGE_DESTROY_FREE
);
214 agp_free_key(curr
->key
);
215 agp_free_page_array(curr
);
218 EXPORT_SYMBOL(agp_free_memory
);
220 #define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long))
223 * agp_allocate_memory - allocate a group of pages of a certain type.
225 * @page_count: size_t argument of the number of pages
226 * @type: u32 argument of the type of memory to be allocated.
228 * Every agp bridge device will allow you to allocate AGP_NORMAL_MEMORY which
229 * maps to physical ram. Any other type is device dependent.
231 * It returns NULL whenever memory is unavailable.
233 struct agp_memory
*agp_allocate_memory(struct agp_bridge_data
*bridge
,
234 size_t page_count
, u32 type
)
237 struct agp_memory
*new;
243 if ((atomic_read(&bridge
->current_memory_agp
) + page_count
) > bridge
->max_memory_agp
)
246 if (type
>= AGP_USER_TYPES
) {
247 new = agp_generic_alloc_user(page_count
, type
);
249 new->bridge
= bridge
;
254 new = bridge
->driver
->alloc_by_type(page_count
, type
);
256 new->bridge
= bridge
;
260 scratch_pages
= (page_count
+ ENTRIES_PER_PAGE
- 1) / ENTRIES_PER_PAGE
;
262 new = agp_create_memory(scratch_pages
);
267 for (i
= 0; i
< page_count
; i
++) {
268 void *addr
= bridge
->driver
->agp_alloc_page(bridge
);
271 agp_free_memory(new);
274 new->memory
[i
] = virt_to_gart(addr
);
277 map_page_into_agp_global_flush();
278 new->bridge
= bridge
;
282 EXPORT_SYMBOL(agp_allocate_memory
);
285 /* End - Generic routines for handling agp_memory structures */
288 static int agp_return_size(void)
293 temp
= agp_bridge
->current_size
;
295 switch (agp_bridge
->driver
->size_type
) {
297 current_size
= A_SIZE_8(temp
)->size
;
300 current_size
= A_SIZE_16(temp
)->size
;
303 current_size
= A_SIZE_32(temp
)->size
;
306 current_size
= A_SIZE_LVL2(temp
)->size
;
308 case FIXED_APER_SIZE
:
309 current_size
= A_SIZE_FIX(temp
)->size
;
316 current_size
-= (agp_memory_reserved
/ (1024*1024));
323 int agp_num_entries(void)
328 temp
= agp_bridge
->current_size
;
330 switch (agp_bridge
->driver
->size_type
) {
332 num_entries
= A_SIZE_8(temp
)->num_entries
;
335 num_entries
= A_SIZE_16(temp
)->num_entries
;
338 num_entries
= A_SIZE_32(temp
)->num_entries
;
341 num_entries
= A_SIZE_LVL2(temp
)->num_entries
;
343 case FIXED_APER_SIZE
:
344 num_entries
= A_SIZE_FIX(temp
)->num_entries
;
351 num_entries
-= agp_memory_reserved
>>PAGE_SHIFT
;
356 EXPORT_SYMBOL_GPL(agp_num_entries
);
360 * agp_copy_info - copy bridge state information
362 * @info: agp_kern_info pointer. The caller should insure that this pointer is valid.
364 * This function copies information about the agp bridge device and the state of
365 * the agp backend into an agp_kern_info pointer.
367 int agp_copy_info(struct agp_bridge_data
*bridge
, struct agp_kern_info
*info
)
369 memset(info
, 0, sizeof(struct agp_kern_info
));
371 info
->chipset
= NOT_SUPPORTED
;
375 info
->version
.major
= bridge
->version
->major
;
376 info
->version
.minor
= bridge
->version
->minor
;
377 info
->chipset
= SUPPORTED
;
378 info
->device
= bridge
->dev
;
379 if (bridge
->mode
& AGPSTAT_MODE_3_0
)
380 info
->mode
= bridge
->mode
& ~AGP3_RESERVED_MASK
;
382 info
->mode
= bridge
->mode
& ~AGP2_RESERVED_MASK
;
383 info
->aper_base
= bridge
->gart_bus_addr
;
384 info
->aper_size
= agp_return_size();
385 info
->max_memory
= bridge
->max_memory_agp
;
386 info
->current_memory
= atomic_read(&bridge
->current_memory_agp
);
387 info
->cant_use_aperture
= bridge
->driver
->cant_use_aperture
;
388 info
->vm_ops
= bridge
->vm_ops
;
389 info
->page_mask
= ~0UL;
392 EXPORT_SYMBOL(agp_copy_info
);
394 /* End - Routine to copy over information structure */
397 * Routines for handling swapping of agp_memory into the GATT -
398 * These routines take agp_memory and insert them into the GATT.
399 * They call device specific routines to actually write to the GATT.
403 * agp_bind_memory - Bind an agp_memory structure into the GATT.
405 * @curr: agp_memory pointer
406 * @pg_start: an offset into the graphics aperture translation table
408 * It returns -EINVAL if the pointer == NULL.
409 * It returns -EBUSY if the area of the table requested is already in use.
411 int agp_bind_memory(struct agp_memory
*curr
, off_t pg_start
)
418 if (curr
->is_bound
) {
419 printk(KERN_INFO PFX
"memory %p is already bound!\n", curr
);
422 if (!curr
->is_flushed
) {
423 curr
->bridge
->driver
->cache_flush();
424 curr
->is_flushed
= true;
426 ret_val
= curr
->bridge
->driver
->insert_memory(curr
, pg_start
, curr
->type
);
431 curr
->is_bound
= true;
432 curr
->pg_start
= pg_start
;
435 EXPORT_SYMBOL(agp_bind_memory
);
439 * agp_unbind_memory - Removes an agp_memory structure from the GATT
441 * @curr: agp_memory pointer to be removed from the GATT.
443 * It returns -EINVAL if this piece of agp_memory is not currently bound to
444 * the graphics aperture translation table or if the agp_memory pointer == NULL
446 int agp_unbind_memory(struct agp_memory
*curr
)
453 if (!curr
->is_bound
) {
454 printk(KERN_INFO PFX
"memory %p was not bound!\n", curr
);
458 ret_val
= curr
->bridge
->driver
->remove_memory(curr
, curr
->pg_start
, curr
->type
);
463 curr
->is_bound
= false;
467 EXPORT_SYMBOL(agp_unbind_memory
);
469 /* End - Routines for handling swapping of agp_memory into the GATT */
472 /* Generic Agp routines - Start */
473 static void agp_v2_parse_one(u32
*requested_mode
, u32
*bridge_agpstat
, u32
*vga_agpstat
)
477 if (*requested_mode
& AGP2_RESERVED_MASK
) {
478 printk(KERN_INFO PFX
"reserved bits set (%x) in mode 0x%x. Fixed.\n",
479 *requested_mode
& AGP2_RESERVED_MASK
, *requested_mode
);
480 *requested_mode
&= ~AGP2_RESERVED_MASK
;
484 * Some dumb bridges are programmed to disobey the AGP2 spec.
485 * This is likely a BIOS misprogramming rather than poweron default, or
486 * it would be a lot more common.
487 * https://bugs.freedesktop.org/show_bug.cgi?id=8816
488 * AGPv2 spec 6.1.9 states:
489 * The RATE field indicates the data transfer rates supported by this
490 * device. A.G.P. devices must report all that apply.
491 * Fix them up as best we can.
493 switch (*bridge_agpstat
& 7) {
495 *bridge_agpstat
|= (AGPSTAT2_2X
| AGPSTAT2_1X
);
496 printk(KERN_INFO PFX
"BIOS bug. AGP bridge claims to only support x4 rate"
497 "Fixing up support for x2 & x1\n");
500 *bridge_agpstat
|= AGPSTAT2_1X
;
501 printk(KERN_INFO PFX
"BIOS bug. AGP bridge claims to only support x2 rate"
502 "Fixing up support for x1\n");
508 /* Check the speed bits make sense. Only one should be set. */
509 tmp
= *requested_mode
& 7;
512 printk(KERN_INFO PFX
"%s tried to set rate=x0. Setting to x1 mode.\n", current
->comm
);
513 *requested_mode
|= AGPSTAT2_1X
;
519 *requested_mode
&= ~(AGPSTAT2_1X
); /* rate=2 */
526 *requested_mode
&= ~(AGPSTAT2_1X
|AGPSTAT2_2X
); /* rate=4*/
530 /* disable SBA if it's not supported */
531 if (!((*bridge_agpstat
& AGPSTAT_SBA
) && (*vga_agpstat
& AGPSTAT_SBA
) && (*requested_mode
& AGPSTAT_SBA
)))
532 *bridge_agpstat
&= ~AGPSTAT_SBA
;
535 if (!((*bridge_agpstat
& AGPSTAT2_4X
) && (*vga_agpstat
& AGPSTAT2_4X
) && (*requested_mode
& AGPSTAT2_4X
)))
536 *bridge_agpstat
&= ~AGPSTAT2_4X
;
538 if (!((*bridge_agpstat
& AGPSTAT2_2X
) && (*vga_agpstat
& AGPSTAT2_2X
) && (*requested_mode
& AGPSTAT2_2X
)))
539 *bridge_agpstat
&= ~AGPSTAT2_2X
;
541 if (!((*bridge_agpstat
& AGPSTAT2_1X
) && (*vga_agpstat
& AGPSTAT2_1X
) && (*requested_mode
& AGPSTAT2_1X
)))
542 *bridge_agpstat
&= ~AGPSTAT2_1X
;
544 /* Now we know what mode it should be, clear out the unwanted bits. */
545 if (*bridge_agpstat
& AGPSTAT2_4X
)
546 *bridge_agpstat
&= ~(AGPSTAT2_1X
| AGPSTAT2_2X
); /* 4X */
548 if (*bridge_agpstat
& AGPSTAT2_2X
)
549 *bridge_agpstat
&= ~(AGPSTAT2_1X
| AGPSTAT2_4X
); /* 2X */
551 if (*bridge_agpstat
& AGPSTAT2_1X
)
552 *bridge_agpstat
&= ~(AGPSTAT2_2X
| AGPSTAT2_4X
); /* 1X */
554 /* Apply any errata. */
555 if (agp_bridge
->flags
& AGP_ERRATA_FASTWRITES
)
556 *bridge_agpstat
&= ~AGPSTAT_FW
;
558 if (agp_bridge
->flags
& AGP_ERRATA_SBA
)
559 *bridge_agpstat
&= ~AGPSTAT_SBA
;
561 if (agp_bridge
->flags
& AGP_ERRATA_1X
) {
562 *bridge_agpstat
&= ~(AGPSTAT2_2X
| AGPSTAT2_4X
);
563 *bridge_agpstat
|= AGPSTAT2_1X
;
566 /* If we've dropped down to 1X, disable fast writes. */
567 if (*bridge_agpstat
& AGPSTAT2_1X
)
568 *bridge_agpstat
&= ~AGPSTAT_FW
;
572 * requested_mode = Mode requested by (typically) X.
573 * bridge_agpstat = PCI_AGP_STATUS from agp bridge.
574 * vga_agpstat = PCI_AGP_STATUS from graphic card.
576 static void agp_v3_parse_one(u32
*requested_mode
, u32
*bridge_agpstat
, u32
*vga_agpstat
)
578 u32 origbridge
=*bridge_agpstat
, origvga
=*vga_agpstat
;
581 if (*requested_mode
& AGP3_RESERVED_MASK
) {
582 printk(KERN_INFO PFX
"reserved bits set (%x) in mode 0x%x. Fixed.\n",
583 *requested_mode
& AGP3_RESERVED_MASK
, *requested_mode
);
584 *requested_mode
&= ~AGP3_RESERVED_MASK
;
587 /* Check the speed bits make sense. */
588 tmp
= *requested_mode
& 7;
590 printk(KERN_INFO PFX
"%s tried to set rate=x0. Setting to AGP3 x4 mode.\n", current
->comm
);
591 *requested_mode
|= AGPSTAT3_4X
;
594 printk(KERN_INFO PFX
"%s tried to set rate=x%d. Setting to AGP3 x8 mode.\n", current
->comm
, tmp
* 4);
595 *requested_mode
= (*requested_mode
& ~7) | AGPSTAT3_8X
;
598 /* ARQSZ - Set the value to the maximum one.
599 * Don't allow the mode register to override values. */
600 *bridge_agpstat
= ((*bridge_agpstat
& ~AGPSTAT_ARQSZ
) |
601 max_t(u32
,(*bridge_agpstat
& AGPSTAT_ARQSZ
),(*vga_agpstat
& AGPSTAT_ARQSZ
)));
603 /* Calibration cycle.
604 * Don't allow the mode register to override values. */
605 *bridge_agpstat
= ((*bridge_agpstat
& ~AGPSTAT_CAL_MASK
) |
606 min_t(u32
,(*bridge_agpstat
& AGPSTAT_CAL_MASK
),(*vga_agpstat
& AGPSTAT_CAL_MASK
)));
608 /* SBA *must* be supported for AGP v3 */
609 *bridge_agpstat
|= AGPSTAT_SBA
;
613 * Check for invalid speeds. This can happen when applications
614 * written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware
616 if (*requested_mode
& AGPSTAT_MODE_3_0
) {
618 * Caller hasn't a clue what it is doing. Bridge is in 3.0 mode,
619 * have been passed a 3.0 mode, but with 2.x speed bits set.
620 * AGP2.x 4x -> AGP3.0 4x.
622 if (*requested_mode
& AGPSTAT2_4X
) {
623 printk(KERN_INFO PFX
"%s passes broken AGP3 flags (%x). Fixed.\n",
624 current
->comm
, *requested_mode
);
625 *requested_mode
&= ~AGPSTAT2_4X
;
626 *requested_mode
|= AGPSTAT3_4X
;
630 * The caller doesn't know what they are doing. We are in 3.0 mode,
631 * but have been passed an AGP 2.x mode.
632 * Convert AGP 1x,2x,4x -> AGP 3.0 4x.
634 printk(KERN_INFO PFX
"%s passes broken AGP2 flags (%x) in AGP3 mode. Fixed.\n",
635 current
->comm
, *requested_mode
);
636 *requested_mode
&= ~(AGPSTAT2_4X
| AGPSTAT2_2X
| AGPSTAT2_1X
);
637 *requested_mode
|= AGPSTAT3_4X
;
640 if (*requested_mode
& AGPSTAT3_8X
) {
641 if (!(*bridge_agpstat
& AGPSTAT3_8X
)) {
642 *bridge_agpstat
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
643 *bridge_agpstat
|= AGPSTAT3_4X
;
644 printk(KERN_INFO PFX
"%s requested AGPx8 but bridge not capable.\n", current
->comm
);
647 if (!(*vga_agpstat
& AGPSTAT3_8X
)) {
648 *bridge_agpstat
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
649 *bridge_agpstat
|= AGPSTAT3_4X
;
650 printk(KERN_INFO PFX
"%s requested AGPx8 but graphic card not capable.\n", current
->comm
);
653 /* All set, bridge & device can do AGP x8*/
654 *bridge_agpstat
&= ~(AGPSTAT3_4X
| AGPSTAT3_RSVD
);
657 } else if (*requested_mode
& AGPSTAT3_4X
) {
658 *bridge_agpstat
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
659 *bridge_agpstat
|= AGPSTAT3_4X
;
665 * If we didn't specify an AGP mode, we see if both
666 * the graphics card, and the bridge can do x8, and use if so.
667 * If not, we fall back to x4 mode.
669 if ((*bridge_agpstat
& AGPSTAT3_8X
) && (*vga_agpstat
& AGPSTAT3_8X
)) {
670 printk(KERN_INFO PFX
"No AGP mode specified. Setting to highest mode "
671 "supported by bridge & card (x8).\n");
672 *bridge_agpstat
&= ~(AGPSTAT3_4X
| AGPSTAT3_RSVD
);
673 *vga_agpstat
&= ~(AGPSTAT3_4X
| AGPSTAT3_RSVD
);
675 printk(KERN_INFO PFX
"Fell back to AGPx4 mode because");
676 if (!(*bridge_agpstat
& AGPSTAT3_8X
)) {
677 printk(KERN_INFO PFX
"bridge couldn't do x8. bridge_agpstat:%x (orig=%x)\n",
678 *bridge_agpstat
, origbridge
);
679 *bridge_agpstat
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
680 *bridge_agpstat
|= AGPSTAT3_4X
;
682 if (!(*vga_agpstat
& AGPSTAT3_8X
)) {
683 printk(KERN_INFO PFX
"graphics card couldn't do x8. vga_agpstat:%x (orig=%x)\n",
684 *vga_agpstat
, origvga
);
685 *vga_agpstat
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
686 *vga_agpstat
|= AGPSTAT3_4X
;
692 /* Apply any errata. */
693 if (agp_bridge
->flags
& AGP_ERRATA_FASTWRITES
)
694 *bridge_agpstat
&= ~AGPSTAT_FW
;
696 if (agp_bridge
->flags
& AGP_ERRATA_SBA
)
697 *bridge_agpstat
&= ~AGPSTAT_SBA
;
699 if (agp_bridge
->flags
& AGP_ERRATA_1X
) {
700 *bridge_agpstat
&= ~(AGPSTAT2_2X
| AGPSTAT2_4X
);
701 *bridge_agpstat
|= AGPSTAT2_1X
;
707 * agp_collect_device_status - determine correct agp_cmd from various agp_stat's
708 * @bridge: an agp_bridge_data struct allocated for the AGP host bridge.
709 * @requested_mode: requested agp_stat from userspace (Typically from X)
710 * @bridge_agpstat: current agp_stat from AGP bridge.
712 * This function will hunt for an AGP graphics card, and try to match
713 * the requested mode to the capabilities of both the bridge and the card.
715 u32
agp_collect_device_status(struct agp_bridge_data
*bridge
, u32 requested_mode
, u32 bridge_agpstat
)
717 struct pci_dev
*device
= NULL
;
722 device
= pci_get_class(PCI_CLASS_DISPLAY_VGA
<< 8, device
);
724 printk(KERN_INFO PFX
"Couldn't find an AGP VGA controller.\n");
727 cap_ptr
= pci_find_capability(device
, PCI_CAP_ID_AGP
);
733 * Ok, here we have a AGP device. Disable impossible
734 * settings, and adjust the readqueue to the minimum.
736 pci_read_config_dword(device
, cap_ptr
+PCI_AGP_STATUS
, &vga_agpstat
);
738 /* adjust RQ depth */
739 bridge_agpstat
= ((bridge_agpstat
& ~AGPSTAT_RQ_DEPTH
) |
740 min_t(u32
, (requested_mode
& AGPSTAT_RQ_DEPTH
),
741 min_t(u32
, (bridge_agpstat
& AGPSTAT_RQ_DEPTH
), (vga_agpstat
& AGPSTAT_RQ_DEPTH
))));
743 /* disable FW if it's not supported */
744 if (!((bridge_agpstat
& AGPSTAT_FW
) &&
745 (vga_agpstat
& AGPSTAT_FW
) &&
746 (requested_mode
& AGPSTAT_FW
)))
747 bridge_agpstat
&= ~AGPSTAT_FW
;
749 /* Check to see if we are operating in 3.0 mode */
750 if (agp_bridge
->mode
& AGPSTAT_MODE_3_0
)
751 agp_v3_parse_one(&requested_mode
, &bridge_agpstat
, &vga_agpstat
);
753 agp_v2_parse_one(&requested_mode
, &bridge_agpstat
, &vga_agpstat
);
756 return bridge_agpstat
;
758 EXPORT_SYMBOL(agp_collect_device_status
);
761 void agp_device_command(u32 bridge_agpstat
, bool agp_v3
)
763 struct pci_dev
*device
= NULL
;
766 mode
= bridge_agpstat
& 0x7;
770 for_each_pci_dev(device
) {
771 u8 agp
= pci_find_capability(device
, PCI_CAP_ID_AGP
);
775 printk(KERN_INFO PFX
"Putting AGP V%d device at %s into %dx mode\n",
776 agp_v3
? 3 : 2, pci_name(device
), mode
);
777 pci_write_config_dword(device
, agp
+ PCI_AGP_COMMAND
, bridge_agpstat
);
780 EXPORT_SYMBOL(agp_device_command
);
783 void get_agp_version(struct agp_bridge_data
*bridge
)
787 /* Exit early if already set by errata workarounds. */
788 if (bridge
->major_version
!= 0)
791 pci_read_config_dword(bridge
->dev
, bridge
->capndx
, &ncapid
);
792 bridge
->major_version
= (ncapid
>> AGP_MAJOR_VERSION_SHIFT
) & 0xf;
793 bridge
->minor_version
= (ncapid
>> AGP_MINOR_VERSION_SHIFT
) & 0xf;
795 EXPORT_SYMBOL(get_agp_version
);
798 void agp_generic_enable(struct agp_bridge_data
*bridge
, u32 requested_mode
)
800 u32 bridge_agpstat
, temp
;
802 get_agp_version(agp_bridge
);
804 printk(KERN_INFO PFX
"Found an AGP %d.%d compliant device at %s.\n",
805 agp_bridge
->major_version
,
806 agp_bridge
->minor_version
,
807 pci_name(agp_bridge
->dev
));
809 pci_read_config_dword(agp_bridge
->dev
,
810 agp_bridge
->capndx
+ PCI_AGP_STATUS
, &bridge_agpstat
);
812 bridge_agpstat
= agp_collect_device_status(agp_bridge
, requested_mode
, bridge_agpstat
);
813 if (bridge_agpstat
== 0)
814 /* Something bad happened. FIXME: Return error code? */
817 bridge_agpstat
|= AGPSTAT_AGP_ENABLE
;
819 /* Do AGP version specific frobbing. */
820 if (bridge
->major_version
>= 3) {
821 if (bridge
->mode
& AGPSTAT_MODE_3_0
) {
822 /* If we have 3.5, we can do the isoch stuff. */
823 if (bridge
->minor_version
>= 5)
824 agp_3_5_enable(bridge
);
825 agp_device_command(bridge_agpstat
, true);
828 /* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/
829 bridge_agpstat
&= ~(7<<10) ;
830 pci_read_config_dword(bridge
->dev
,
831 bridge
->capndx
+AGPCTRL
, &temp
);
833 pci_write_config_dword(bridge
->dev
,
834 bridge
->capndx
+AGPCTRL
, temp
);
836 printk(KERN_INFO PFX
"Device is in legacy mode,"
837 " falling back to 2.x\n");
842 agp_device_command(bridge_agpstat
, false);
844 EXPORT_SYMBOL(agp_generic_enable
);
847 int agp_generic_create_gatt_table(struct agp_bridge_data
*bridge
)
858 /* The generic routines can't handle 2 level gatt's */
859 if (bridge
->driver
->size_type
== LVL2_APER_SIZE
)
863 i
= bridge
->aperture_size_idx
;
864 temp
= bridge
->current_size
;
865 size
= page_order
= num_entries
= 0;
867 if (bridge
->driver
->size_type
!= FIXED_APER_SIZE
) {
869 switch (bridge
->driver
->size_type
) {
871 size
= A_SIZE_8(temp
)->size
;
873 A_SIZE_8(temp
)->page_order
;
875 A_SIZE_8(temp
)->num_entries
;
878 size
= A_SIZE_16(temp
)->size
;
879 page_order
= A_SIZE_16(temp
)->page_order
;
880 num_entries
= A_SIZE_16(temp
)->num_entries
;
883 size
= A_SIZE_32(temp
)->size
;
884 page_order
= A_SIZE_32(temp
)->page_order
;
885 num_entries
= A_SIZE_32(temp
)->num_entries
;
887 /* This case will never really happen. */
888 case FIXED_APER_SIZE
:
891 size
= page_order
= num_entries
= 0;
895 table
= alloc_gatt_pages(page_order
);
899 switch (bridge
->driver
->size_type
) {
901 bridge
->current_size
= A_IDX8(bridge
);
904 bridge
->current_size
= A_IDX16(bridge
);
907 bridge
->current_size
= A_IDX32(bridge
);
909 /* These cases will never really happen. */
910 case FIXED_APER_SIZE
:
915 temp
= bridge
->current_size
;
917 bridge
->aperture_size_idx
= i
;
919 } while (!table
&& (i
< bridge
->driver
->num_aperture_sizes
));
921 size
= ((struct aper_size_info_fixed
*) temp
)->size
;
922 page_order
= ((struct aper_size_info_fixed
*) temp
)->page_order
;
923 num_entries
= ((struct aper_size_info_fixed
*) temp
)->num_entries
;
924 table
= alloc_gatt_pages(page_order
);
930 table_end
= table
+ ((PAGE_SIZE
* (1 << page_order
)) - 1);
932 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
933 SetPageReserved(page
);
935 bridge
->gatt_table_real
= (u32
*) table
;
936 agp_gatt_table
= (void *)table
;
938 bridge
->driver
->cache_flush();
940 set_memory_uc((unsigned long)table
, 1 << page_order
);
941 bridge
->gatt_table
= (void *)table
;
943 bridge
->gatt_table
= ioremap_nocache(virt_to_gart(table
),
944 (PAGE_SIZE
* (1 << page_order
)));
945 bridge
->driver
->cache_flush();
948 if (bridge
->gatt_table
== NULL
) {
949 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
950 ClearPageReserved(page
);
952 free_gatt_pages(table
, page_order
);
956 bridge
->gatt_bus_addr
= virt_to_gart(bridge
->gatt_table_real
);
958 /* AK: bogus, should encode addresses > 4GB */
959 for (i
= 0; i
< num_entries
; i
++) {
960 writel(bridge
->scratch_page
, bridge
->gatt_table
+i
);
961 readl(bridge
->gatt_table
+i
); /* PCI Posting. */
966 EXPORT_SYMBOL(agp_generic_create_gatt_table
);
968 int agp_generic_free_gatt_table(struct agp_bridge_data
*bridge
)
971 char *table
, *table_end
;
975 temp
= bridge
->current_size
;
977 switch (bridge
->driver
->size_type
) {
979 page_order
= A_SIZE_8(temp
)->page_order
;
982 page_order
= A_SIZE_16(temp
)->page_order
;
985 page_order
= A_SIZE_32(temp
)->page_order
;
987 case FIXED_APER_SIZE
:
988 page_order
= A_SIZE_FIX(temp
)->page_order
;
991 /* The generic routines can't deal with 2 level gatt's */
999 /* Do not worry about freeing memory, because if this is
1000 * called, then all agp memory is deallocated and removed
1001 * from the table. */
1004 set_memory_wb((unsigned long)bridge
->gatt_table
, 1 << page_order
);
1006 iounmap(bridge
->gatt_table
);
1008 table
= (char *) bridge
->gatt_table_real
;
1009 table_end
= table
+ ((PAGE_SIZE
* (1 << page_order
)) - 1);
1011 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
1012 ClearPageReserved(page
);
1014 free_gatt_pages(bridge
->gatt_table_real
, page_order
);
1016 agp_gatt_table
= NULL
;
1017 bridge
->gatt_table
= NULL
;
1018 bridge
->gatt_table_real
= NULL
;
1019 bridge
->gatt_bus_addr
= 0;
1023 EXPORT_SYMBOL(agp_generic_free_gatt_table
);
1026 int agp_generic_insert_memory(struct agp_memory
* mem
, off_t pg_start
, int type
)
1032 struct agp_bridge_data
*bridge
;
1035 bridge
= mem
->bridge
;
1039 if (mem
->page_count
== 0)
1042 temp
= bridge
->current_size
;
1044 switch (bridge
->driver
->size_type
) {
1046 num_entries
= A_SIZE_8(temp
)->num_entries
;
1049 num_entries
= A_SIZE_16(temp
)->num_entries
;
1052 num_entries
= A_SIZE_32(temp
)->num_entries
;
1054 case FIXED_APER_SIZE
:
1055 num_entries
= A_SIZE_FIX(temp
)->num_entries
;
1057 case LVL2_APER_SIZE
:
1058 /* The generic routines can't deal with 2 level gatt's */
1066 num_entries
-= agp_memory_reserved
/PAGE_SIZE
;
1067 if (num_entries
< 0) num_entries
= 0;
1069 if (type
!= mem
->type
)
1072 mask_type
= bridge
->driver
->agp_type_to_mask_type(bridge
, type
);
1073 if (mask_type
!= 0) {
1074 /* The generic routines know nothing of memory types */
1078 /* AK: could wrap */
1079 if ((pg_start
+ mem
->page_count
) > num_entries
)
1084 while (j
< (pg_start
+ mem
->page_count
)) {
1085 if (!PGE_EMPTY(bridge
, readl(bridge
->gatt_table
+j
)))
1090 if (!mem
->is_flushed
) {
1091 bridge
->driver
->cache_flush();
1092 mem
->is_flushed
= true;
1095 for (i
= 0, j
= pg_start
; i
< mem
->page_count
; i
++, j
++) {
1096 writel(bridge
->driver
->mask_memory(bridge
, mem
->memory
[i
], mask_type
),
1097 bridge
->gatt_table
+j
);
1099 readl(bridge
->gatt_table
+j
-1); /* PCI Posting. */
1101 bridge
->driver
->tlb_flush(mem
);
1104 EXPORT_SYMBOL(agp_generic_insert_memory
);
1107 int agp_generic_remove_memory(struct agp_memory
*mem
, off_t pg_start
, int type
)
1110 struct agp_bridge_data
*bridge
;
1113 bridge
= mem
->bridge
;
1117 if (mem
->page_count
== 0)
1120 if (type
!= mem
->type
)
1123 mask_type
= bridge
->driver
->agp_type_to_mask_type(bridge
, type
);
1124 if (mask_type
!= 0) {
1125 /* The generic routines know nothing of memory types */
1129 /* AK: bogus, should encode addresses > 4GB */
1130 for (i
= pg_start
; i
< (mem
->page_count
+ pg_start
); i
++) {
1131 writel(bridge
->scratch_page
, bridge
->gatt_table
+i
);
1133 readl(bridge
->gatt_table
+i
-1); /* PCI Posting. */
1135 bridge
->driver
->tlb_flush(mem
);
1138 EXPORT_SYMBOL(agp_generic_remove_memory
);
1140 struct agp_memory
*agp_generic_alloc_by_type(size_t page_count
, int type
)
1144 EXPORT_SYMBOL(agp_generic_alloc_by_type
);
1146 void agp_generic_free_by_type(struct agp_memory
*curr
)
1148 agp_free_page_array(curr
);
1149 agp_free_key(curr
->key
);
1152 EXPORT_SYMBOL(agp_generic_free_by_type
);
1154 struct agp_memory
*agp_generic_alloc_user(size_t page_count
, int type
)
1156 struct agp_memory
*new;
1160 pages
= (page_count
+ ENTRIES_PER_PAGE
- 1) / ENTRIES_PER_PAGE
;
1161 new = agp_create_user_memory(page_count
);
1165 for (i
= 0; i
< page_count
; i
++)
1167 new->page_count
= 0;
1169 new->num_scratch_pages
= pages
;
1173 EXPORT_SYMBOL(agp_generic_alloc_user
);
1176 * Basic Page Allocation Routines -
1177 * These routines handle page allocation and by default they reserve the allocated
1178 * memory. They also handle incrementing the current_memory_agp value, Which is checked
1179 * against a maximum value.
1182 void *agp_generic_alloc_page(struct agp_bridge_data
*bridge
)
1186 page
= alloc_page(GFP_KERNEL
| GFP_DMA32
);
1190 /* agp_allocate_memory will do flush */
1191 map_page_into_agp_noflush(page
);
1194 atomic_inc(&agp_bridge
->current_memory_agp
);
1195 return page_address(page
);
1197 EXPORT_SYMBOL(agp_generic_alloc_page
);
1200 void agp_generic_destroy_page(void *addr
, int flags
)
1207 page
= virt_to_page(addr
);
1208 if (flags
& AGP_PAGE_DESTROY_UNMAP
)
1209 unmap_page_from_agp(page
);
1211 if (flags
& AGP_PAGE_DESTROY_FREE
) {
1213 free_page((unsigned long)addr
);
1214 atomic_dec(&agp_bridge
->current_memory_agp
);
1217 EXPORT_SYMBOL(agp_generic_destroy_page
);
1219 /* End Basic Page Allocation Routines */
1223 * agp_enable - initialise the agp point-to-point connection.
1225 * @mode: agp mode register value to configure with.
1227 void agp_enable(struct agp_bridge_data
*bridge
, u32 mode
)
1231 bridge
->driver
->agp_enable(bridge
, mode
);
1233 EXPORT_SYMBOL(agp_enable
);
1235 /* When we remove the global variable agp_bridge from all drivers
1236 * then agp_alloc_bridge and agp_generic_find_bridge need to be updated
1239 struct agp_bridge_data
*agp_generic_find_bridge(struct pci_dev
*pdev
)
1241 if (list_empty(&agp_bridges
))
1247 static void ipi_handler(void *null
)
1252 void global_cache_flush(void)
1254 if (on_each_cpu(ipi_handler
, NULL
, 1) != 0)
1255 panic(PFX
"timed out waiting for the other CPUs!\n");
1257 EXPORT_SYMBOL(global_cache_flush
);
1259 unsigned long agp_generic_mask_memory(struct agp_bridge_data
*bridge
,
1260 unsigned long addr
, int type
)
1262 /* memory type is ignored in the generic routine */
1263 if (bridge
->driver
->masks
)
1264 return addr
| bridge
->driver
->masks
[0].mask
;
1268 EXPORT_SYMBOL(agp_generic_mask_memory
);
1270 int agp_generic_type_to_mask_type(struct agp_bridge_data
*bridge
,
1273 if (type
>= AGP_USER_TYPES
)
1277 EXPORT_SYMBOL(agp_generic_type_to_mask_type
);
1280 * These functions are implemented according to the AGPv3 spec,
1281 * which covers implementation details that had previously been
1285 int agp3_generic_fetch_size(void)
1289 struct aper_size_info_16
*values
;
1291 pci_read_config_word(agp_bridge
->dev
, agp_bridge
->capndx
+AGPAPSIZE
, &temp_size
);
1292 values
= A_SIZE_16(agp_bridge
->driver
->aperture_sizes
);
1294 for (i
= 0; i
< agp_bridge
->driver
->num_aperture_sizes
; i
++) {
1295 if (temp_size
== values
[i
].size_value
) {
1296 agp_bridge
->previous_size
=
1297 agp_bridge
->current_size
= (void *) (values
+ i
);
1299 agp_bridge
->aperture_size_idx
= i
;
1300 return values
[i
].size
;
1305 EXPORT_SYMBOL(agp3_generic_fetch_size
);
1307 void agp3_generic_tlbflush(struct agp_memory
*mem
)
1310 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, &ctrl
);
1311 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, ctrl
& ~AGPCTRL_GTLBEN
);
1312 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, ctrl
);
1314 EXPORT_SYMBOL(agp3_generic_tlbflush
);
1316 int agp3_generic_configure(void)
1319 struct aper_size_info_16
*current_size
;
1321 current_size
= A_SIZE_16(agp_bridge
->current_size
);
1323 pci_read_config_dword(agp_bridge
->dev
, AGP_APBASE
, &temp
);
1324 agp_bridge
->gart_bus_addr
= (temp
& PCI_BASE_ADDRESS_MEM_MASK
);
1326 /* set aperture size */
1327 pci_write_config_word(agp_bridge
->dev
, agp_bridge
->capndx
+AGPAPSIZE
, current_size
->size_value
);
1328 /* set gart pointer */
1329 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPGARTLO
, agp_bridge
->gatt_bus_addr
);
1330 /* enable aperture and GTLB */
1331 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, &temp
);
1332 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, temp
| AGPCTRL_APERENB
| AGPCTRL_GTLBEN
);
1335 EXPORT_SYMBOL(agp3_generic_configure
);
1337 void agp3_generic_cleanup(void)
1340 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, &ctrl
);
1341 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, ctrl
& ~AGPCTRL_APERENB
);
1343 EXPORT_SYMBOL(agp3_generic_cleanup
);
1345 const struct aper_size_info_16 agp3_generic_sizes
[AGP_GENERIC_SIZES_ENTRIES
] =
1347 {4096, 1048576, 10,0x000},
1348 {2048, 524288, 9, 0x800},
1349 {1024, 262144, 8, 0xc00},
1350 { 512, 131072, 7, 0xe00},
1351 { 256, 65536, 6, 0xf00},
1352 { 128, 32768, 5, 0xf20},
1353 { 64, 16384, 4, 0xf30},
1354 { 32, 8192, 3, 0xf38},
1355 { 16, 4096, 2, 0xf3c},
1356 { 8, 2048, 1, 0xf3e},
1357 { 4, 1024, 0, 0xf3f}
1359 EXPORT_SYMBOL(agp3_generic_sizes
);