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/config.h>
31 #include <linux/module.h>
32 #include <linux/pci.h>
33 #include <linux/init.h>
34 #include <linux/pagemap.h>
35 #include <linux/miscdevice.h>
37 #include <linux/agp_backend.h>
38 #include <linux/vmalloc.h>
39 #include <linux/dma-mapping.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
);
55 #if defined(CONFIG_X86)
56 int map_page_into_agp(struct page
*page
)
59 i
= change_page_attr(page
, 1, PAGE_KERNEL_NOCACHE
);
60 /* Caller's responsibility to call global_flush_tlb() for
61 * performance reasons */
64 EXPORT_SYMBOL_GPL(map_page_into_agp
);
66 int unmap_page_from_agp(struct page
*page
)
69 i
= change_page_attr(page
, 1, PAGE_KERNEL
);
70 /* Caller's responsibility to call global_flush_tlb() for
71 * performance reasons */
74 EXPORT_SYMBOL_GPL(unmap_page_from_agp
);
78 * Generic routines for handling agp_memory structures -
79 * They use the basic page allocation routines to do the brunt of the work.
82 void agp_free_key(int key
)
88 clear_bit(key
, agp_bridge
->key_list
);
90 EXPORT_SYMBOL(agp_free_key
);
93 static int agp_get_key(void)
97 bit
= find_first_zero_bit(agp_bridge
->key_list
, MAXKEY
);
99 set_bit(bit
, agp_bridge
->key_list
);
106 struct agp_memory
*agp_create_memory(int scratch_pages
)
108 struct agp_memory
*new;
110 new = kzalloc(sizeof(struct agp_memory
), GFP_KERNEL
);
114 new->key
= agp_get_key();
120 new->memory
= vmalloc(PAGE_SIZE
* scratch_pages
);
122 if (new->memory
== NULL
) {
123 agp_free_key(new->key
);
127 new->num_scratch_pages
= scratch_pages
;
130 EXPORT_SYMBOL(agp_create_memory
);
133 * agp_free_memory - free memory associated with an agp_memory pointer.
135 * @curr: agp_memory pointer to be freed.
137 * It is the only function that can be called when the backend is not owned
138 * by the caller. (So it can free memory on client death.)
140 void agp_free_memory(struct agp_memory
*curr
)
147 if (curr
->is_bound
== TRUE
)
148 agp_unbind_memory(curr
);
150 if (curr
->type
!= 0) {
151 curr
->bridge
->driver
->free_by_type(curr
);
154 if (curr
->page_count
!= 0) {
155 for (i
= 0; i
< curr
->page_count
; i
++) {
156 curr
->bridge
->driver
->agp_destroy_page(gart_to_virt(curr
->memory
[i
]));
158 flush_agp_mappings();
160 agp_free_key(curr
->key
);
164 EXPORT_SYMBOL(agp_free_memory
);
166 #define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long))
169 * agp_allocate_memory - allocate a group of pages of a certain type.
171 * @page_count: size_t argument of the number of pages
172 * @type: u32 argument of the type of memory to be allocated.
174 * Every agp bridge device will allow you to allocate AGP_NORMAL_MEMORY which
175 * maps to physical ram. Any other type is device dependent.
177 * It returns NULL whenever memory is unavailable.
179 struct agp_memory
*agp_allocate_memory(struct agp_bridge_data
*bridge
,
180 size_t page_count
, u32 type
)
183 struct agp_memory
*new;
189 if ((atomic_read(&bridge
->current_memory_agp
) + page_count
) > bridge
->max_memory_agp
)
193 new = bridge
->driver
->alloc_by_type(page_count
, type
);
195 new->bridge
= bridge
;
199 scratch_pages
= (page_count
+ ENTRIES_PER_PAGE
- 1) / ENTRIES_PER_PAGE
;
201 new = agp_create_memory(scratch_pages
);
206 for (i
= 0; i
< page_count
; i
++) {
207 void *addr
= bridge
->driver
->agp_alloc_page(bridge
);
210 agp_free_memory(new);
213 new->memory
[i
] = virt_to_gart(addr
);
216 new->bridge
= bridge
;
218 flush_agp_mappings();
222 EXPORT_SYMBOL(agp_allocate_memory
);
225 /* End - Generic routines for handling agp_memory structures */
228 static int agp_return_size(void)
233 temp
= agp_bridge
->current_size
;
235 switch (agp_bridge
->driver
->size_type
) {
237 current_size
= A_SIZE_8(temp
)->size
;
240 current_size
= A_SIZE_16(temp
)->size
;
243 current_size
= A_SIZE_32(temp
)->size
;
246 current_size
= A_SIZE_LVL2(temp
)->size
;
248 case FIXED_APER_SIZE
:
249 current_size
= A_SIZE_FIX(temp
)->size
;
256 current_size
-= (agp_memory_reserved
/ (1024*1024));
263 int agp_num_entries(void)
268 temp
= agp_bridge
->current_size
;
270 switch (agp_bridge
->driver
->size_type
) {
272 num_entries
= A_SIZE_8(temp
)->num_entries
;
275 num_entries
= A_SIZE_16(temp
)->num_entries
;
278 num_entries
= A_SIZE_32(temp
)->num_entries
;
281 num_entries
= A_SIZE_LVL2(temp
)->num_entries
;
283 case FIXED_APER_SIZE
:
284 num_entries
= A_SIZE_FIX(temp
)->num_entries
;
291 num_entries
-= agp_memory_reserved
>>PAGE_SHIFT
;
296 EXPORT_SYMBOL_GPL(agp_num_entries
);
300 * agp_copy_info - copy bridge state information
302 * @info: agp_kern_info pointer. The caller should insure that this pointer is valid.
304 * This function copies information about the agp bridge device and the state of
305 * the agp backend into an agp_kern_info pointer.
307 int agp_copy_info(struct agp_bridge_data
*bridge
, struct agp_kern_info
*info
)
309 memset(info
, 0, sizeof(struct agp_kern_info
));
311 info
->chipset
= NOT_SUPPORTED
;
315 info
->version
.major
= bridge
->version
->major
;
316 info
->version
.minor
= bridge
->version
->minor
;
317 info
->chipset
= SUPPORTED
;
318 info
->device
= bridge
->dev
;
319 if (bridge
->mode
& AGPSTAT_MODE_3_0
)
320 info
->mode
= bridge
->mode
& ~AGP3_RESERVED_MASK
;
322 info
->mode
= bridge
->mode
& ~AGP2_RESERVED_MASK
;
323 info
->aper_base
= bridge
->gart_bus_addr
;
324 info
->aper_size
= agp_return_size();
325 info
->max_memory
= bridge
->max_memory_agp
;
326 info
->current_memory
= atomic_read(&bridge
->current_memory_agp
);
327 info
->cant_use_aperture
= bridge
->driver
->cant_use_aperture
;
328 info
->vm_ops
= bridge
->vm_ops
;
329 info
->page_mask
= ~0UL;
332 EXPORT_SYMBOL(agp_copy_info
);
334 /* End - Routine to copy over information structure */
337 * Routines for handling swapping of agp_memory into the GATT -
338 * These routines take agp_memory and insert them into the GATT.
339 * They call device specific routines to actually write to the GATT.
343 * agp_bind_memory - Bind an agp_memory structure into the GATT.
345 * @curr: agp_memory pointer
346 * @pg_start: an offset into the graphics aperture translation table
348 * It returns -EINVAL if the pointer == NULL.
349 * It returns -EBUSY if the area of the table requested is already in use.
351 int agp_bind_memory(struct agp_memory
*curr
, off_t pg_start
)
358 if (curr
->is_bound
== TRUE
) {
359 printk(KERN_INFO PFX
"memory %p is already bound!\n", curr
);
362 if (curr
->is_flushed
== FALSE
) {
363 curr
->bridge
->driver
->cache_flush();
364 curr
->is_flushed
= TRUE
;
366 ret_val
= curr
->bridge
->driver
->insert_memory(curr
, pg_start
, curr
->type
);
371 curr
->is_bound
= TRUE
;
372 curr
->pg_start
= pg_start
;
375 EXPORT_SYMBOL(agp_bind_memory
);
379 * agp_unbind_memory - Removes an agp_memory structure from the GATT
381 * @curr: agp_memory pointer to be removed from the GATT.
383 * It returns -EINVAL if this piece of agp_memory is not currently bound to
384 * the graphics aperture translation table or if the agp_memory pointer == NULL
386 int agp_unbind_memory(struct agp_memory
*curr
)
393 if (curr
->is_bound
!= TRUE
) {
394 printk(KERN_INFO PFX
"memory %p was not bound!\n", curr
);
398 ret_val
= curr
->bridge
->driver
->remove_memory(curr
, curr
->pg_start
, curr
->type
);
403 curr
->is_bound
= FALSE
;
407 EXPORT_SYMBOL(agp_unbind_memory
);
409 /* End - Routines for handling swapping of agp_memory into the GATT */
412 /* Generic Agp routines - Start */
413 static void agp_v2_parse_one(u32
*requested_mode
, u32
*bridge_agpstat
, u32
*vga_agpstat
)
417 if (*requested_mode
& AGP2_RESERVED_MASK
) {
418 printk(KERN_INFO PFX
"reserved bits set (%x) in mode 0x%x. Fixed.\n",
419 *requested_mode
& AGP2_RESERVED_MASK
, *requested_mode
);
420 *requested_mode
&= ~AGP2_RESERVED_MASK
;
423 /* Check the speed bits make sense. Only one should be set. */
424 tmp
= *requested_mode
& 7;
427 printk(KERN_INFO PFX
"%s tried to set rate=x0. Setting to x1 mode.\n", current
->comm
);
428 *requested_mode
|= AGPSTAT2_1X
;
434 *requested_mode
&= ~(AGPSTAT2_1X
); /* rate=2 */
441 *requested_mode
&= ~(AGPSTAT2_1X
|AGPSTAT2_2X
); /* rate=4*/
445 /* disable SBA if it's not supported */
446 if (!((*bridge_agpstat
& AGPSTAT_SBA
) && (*vga_agpstat
& AGPSTAT_SBA
) && (*requested_mode
& AGPSTAT_SBA
)))
447 *bridge_agpstat
&= ~AGPSTAT_SBA
;
450 if (!((*bridge_agpstat
& AGPSTAT2_4X
) && (*vga_agpstat
& AGPSTAT2_4X
) && (*requested_mode
& AGPSTAT2_4X
)))
451 *bridge_agpstat
&= ~AGPSTAT2_4X
;
453 if (!((*bridge_agpstat
& AGPSTAT2_2X
) && (*vga_agpstat
& AGPSTAT2_2X
) && (*requested_mode
& AGPSTAT2_2X
)))
454 *bridge_agpstat
&= ~AGPSTAT2_2X
;
456 if (!((*bridge_agpstat
& AGPSTAT2_1X
) && (*vga_agpstat
& AGPSTAT2_1X
) && (*requested_mode
& AGPSTAT2_1X
)))
457 *bridge_agpstat
&= ~AGPSTAT2_1X
;
459 /* Now we know what mode it should be, clear out the unwanted bits. */
460 if (*bridge_agpstat
& AGPSTAT2_4X
)
461 *bridge_agpstat
&= ~(AGPSTAT2_1X
| AGPSTAT2_2X
); /* 4X */
463 if (*bridge_agpstat
& AGPSTAT2_2X
)
464 *bridge_agpstat
&= ~(AGPSTAT2_1X
| AGPSTAT2_4X
); /* 2X */
466 if (*bridge_agpstat
& AGPSTAT2_1X
)
467 *bridge_agpstat
&= ~(AGPSTAT2_2X
| AGPSTAT2_4X
); /* 1X */
469 /* Apply any errata. */
470 if (agp_bridge
->flags
& AGP_ERRATA_FASTWRITES
)
471 *bridge_agpstat
&= ~AGPSTAT_FW
;
473 if (agp_bridge
->flags
& AGP_ERRATA_SBA
)
474 *bridge_agpstat
&= ~AGPSTAT_SBA
;
476 if (agp_bridge
->flags
& AGP_ERRATA_1X
) {
477 *bridge_agpstat
&= ~(AGPSTAT2_2X
| AGPSTAT2_4X
);
478 *bridge_agpstat
|= AGPSTAT2_1X
;
481 /* If we've dropped down to 1X, disable fast writes. */
482 if (*bridge_agpstat
& AGPSTAT2_1X
)
483 *bridge_agpstat
&= ~AGPSTAT_FW
;
487 * requested_mode = Mode requested by (typically) X.
488 * bridge_agpstat = PCI_AGP_STATUS from agp bridge.
489 * vga_agpstat = PCI_AGP_STATUS from graphic card.
491 static void agp_v3_parse_one(u32
*requested_mode
, u32
*bridge_agpstat
, u32
*vga_agpstat
)
493 u32 origbridge
=*bridge_agpstat
, origvga
=*vga_agpstat
;
496 if (*requested_mode
& AGP3_RESERVED_MASK
) {
497 printk(KERN_INFO PFX
"reserved bits set (%x) in mode 0x%x. Fixed.\n",
498 *requested_mode
& AGP3_RESERVED_MASK
, *requested_mode
);
499 *requested_mode
&= ~AGP3_RESERVED_MASK
;
502 /* Check the speed bits make sense. */
503 tmp
= *requested_mode
& 7;
505 printk(KERN_INFO PFX
"%s tried to set rate=x0. Setting to AGP3 x4 mode.\n", current
->comm
);
506 *requested_mode
|= AGPSTAT3_4X
;
509 printk(KERN_INFO PFX
"%s tried to set rate=x%d. Setting to AGP3 x8 mode.\n", current
->comm
, tmp
* 4);
510 *requested_mode
= (*requested_mode
& ~7) | AGPSTAT3_8X
;
513 /* ARQSZ - Set the value to the maximum one.
514 * Don't allow the mode register to override values. */
515 *bridge_agpstat
= ((*bridge_agpstat
& ~AGPSTAT_ARQSZ
) |
516 max_t(u32
,(*bridge_agpstat
& AGPSTAT_ARQSZ
),(*vga_agpstat
& AGPSTAT_ARQSZ
)));
518 /* Calibration cycle.
519 * Don't allow the mode register to override values. */
520 *bridge_agpstat
= ((*bridge_agpstat
& ~AGPSTAT_CAL_MASK
) |
521 min_t(u32
,(*bridge_agpstat
& AGPSTAT_CAL_MASK
),(*vga_agpstat
& AGPSTAT_CAL_MASK
)));
523 /* SBA *must* be supported for AGP v3 */
524 *bridge_agpstat
|= AGPSTAT_SBA
;
528 * Check for invalid speeds. This can happen when applications
529 * written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware
531 if (*requested_mode
& AGPSTAT_MODE_3_0
) {
533 * Caller hasn't a clue what it is doing. Bridge is in 3.0 mode,
534 * have been passed a 3.0 mode, but with 2.x speed bits set.
535 * AGP2.x 4x -> AGP3.0 4x.
537 if (*requested_mode
& AGPSTAT2_4X
) {
538 printk(KERN_INFO PFX
"%s passes broken AGP3 flags (%x). Fixed.\n",
539 current
->comm
, *requested_mode
);
540 *requested_mode
&= ~AGPSTAT2_4X
;
541 *requested_mode
|= AGPSTAT3_4X
;
545 * The caller doesn't know what they are doing. We are in 3.0 mode,
546 * but have been passed an AGP 2.x mode.
547 * Convert AGP 1x,2x,4x -> AGP 3.0 4x.
549 printk(KERN_INFO PFX
"%s passes broken AGP2 flags (%x) in AGP3 mode. Fixed.\n",
550 current
->comm
, *requested_mode
);
551 *requested_mode
&= ~(AGPSTAT2_4X
| AGPSTAT2_2X
| AGPSTAT2_1X
);
552 *requested_mode
|= AGPSTAT3_4X
;
555 if (*requested_mode
& AGPSTAT3_8X
) {
556 if (!(*bridge_agpstat
& AGPSTAT3_8X
)) {
557 *bridge_agpstat
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
558 *bridge_agpstat
|= AGPSTAT3_4X
;
559 printk(KERN_INFO PFX
"%s requested AGPx8 but bridge not capable.\n", current
->comm
);
562 if (!(*vga_agpstat
& AGPSTAT3_8X
)) {
563 *bridge_agpstat
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
564 *bridge_agpstat
|= AGPSTAT3_4X
;
565 printk(KERN_INFO PFX
"%s requested AGPx8 but graphic card not capable.\n", current
->comm
);
568 /* All set, bridge & device can do AGP x8*/
569 *bridge_agpstat
&= ~(AGPSTAT3_4X
| AGPSTAT3_RSVD
);
575 * If we didn't specify AGPx8, we can only do x4.
576 * If the hardware can't do x4, we're up shit creek, and never
577 * should have got this far.
579 *bridge_agpstat
&= ~(AGPSTAT3_8X
| AGPSTAT3_RSVD
);
580 if ((*bridge_agpstat
& AGPSTAT3_4X
) && (*vga_agpstat
& AGPSTAT3_4X
))
581 *bridge_agpstat
|= AGPSTAT3_4X
;
583 printk(KERN_INFO PFX
"Badness. Don't know which AGP mode to set. "
584 "[bridge_agpstat:%x vga_agpstat:%x fell back to:- bridge_agpstat:%x vga_agpstat:%x]\n",
585 origbridge
, origvga
, *bridge_agpstat
, *vga_agpstat
);
586 if (!(*bridge_agpstat
& AGPSTAT3_4X
))
587 printk(KERN_INFO PFX
"Bridge couldn't do AGP x4.\n");
588 if (!(*vga_agpstat
& AGPSTAT3_4X
))
589 printk(KERN_INFO PFX
"Graphic card couldn't do AGP x4.\n");
595 /* Apply any errata. */
596 if (agp_bridge
->flags
& AGP_ERRATA_FASTWRITES
)
597 *bridge_agpstat
&= ~AGPSTAT_FW
;
599 if (agp_bridge
->flags
& AGP_ERRATA_SBA
)
600 *bridge_agpstat
&= ~AGPSTAT_SBA
;
602 if (agp_bridge
->flags
& AGP_ERRATA_1X
) {
603 *bridge_agpstat
&= ~(AGPSTAT2_2X
| AGPSTAT2_4X
);
604 *bridge_agpstat
|= AGPSTAT2_1X
;
610 * agp_collect_device_status - determine correct agp_cmd from various agp_stat's
611 * @bridge: an agp_bridge_data struct allocated for the AGP host bridge.
612 * @requested_mode: requested agp_stat from userspace (Typically from X)
613 * @bridge_agpstat: current agp_stat from AGP bridge.
615 * This function will hunt for an AGP graphics card, and try to match
616 * the requested mode to the capabilities of both the bridge and the card.
618 u32
agp_collect_device_status(struct agp_bridge_data
*bridge
, u32 requested_mode
, u32 bridge_agpstat
)
620 struct pci_dev
*device
= NULL
;
625 device
= pci_get_class(PCI_CLASS_DISPLAY_VGA
<< 8, device
);
627 printk(KERN_INFO PFX
"Couldn't find an AGP VGA controller.\n");
630 cap_ptr
= pci_find_capability(device
, PCI_CAP_ID_AGP
);
636 * Ok, here we have a AGP device. Disable impossible
637 * settings, and adjust the readqueue to the minimum.
639 pci_read_config_dword(device
, cap_ptr
+PCI_AGP_STATUS
, &vga_agpstat
);
641 /* adjust RQ depth */
642 bridge_agpstat
= ((bridge_agpstat
& ~AGPSTAT_RQ_DEPTH
) |
643 min_t(u32
, (requested_mode
& AGPSTAT_RQ_DEPTH
),
644 min_t(u32
, (bridge_agpstat
& AGPSTAT_RQ_DEPTH
), (vga_agpstat
& AGPSTAT_RQ_DEPTH
))));
646 /* disable FW if it's not supported */
647 if (!((bridge_agpstat
& AGPSTAT_FW
) &&
648 (vga_agpstat
& AGPSTAT_FW
) &&
649 (requested_mode
& AGPSTAT_FW
)))
650 bridge_agpstat
&= ~AGPSTAT_FW
;
652 /* Check to see if we are operating in 3.0 mode */
653 if (agp_bridge
->mode
& AGPSTAT_MODE_3_0
)
654 agp_v3_parse_one(&requested_mode
, &bridge_agpstat
, &vga_agpstat
);
656 agp_v2_parse_one(&requested_mode
, &bridge_agpstat
, &vga_agpstat
);
659 return bridge_agpstat
;
661 EXPORT_SYMBOL(agp_collect_device_status
);
664 void agp_device_command(u32 bridge_agpstat
, int agp_v3
)
666 struct pci_dev
*device
= NULL
;
669 mode
= bridge_agpstat
& 0x7;
673 for_each_pci_dev(device
) {
674 u8 agp
= pci_find_capability(device
, PCI_CAP_ID_AGP
);
678 printk(KERN_INFO PFX
"Putting AGP V%d device at %s into %dx mode\n",
679 agp_v3
? 3 : 2, pci_name(device
), mode
);
680 pci_write_config_dword(device
, agp
+ PCI_AGP_COMMAND
, bridge_agpstat
);
683 EXPORT_SYMBOL(agp_device_command
);
686 void get_agp_version(struct agp_bridge_data
*bridge
)
690 /* Exit early if already set by errata workarounds. */
691 if (bridge
->major_version
!= 0)
694 pci_read_config_dword(bridge
->dev
, bridge
->capndx
, &ncapid
);
695 bridge
->major_version
= (ncapid
>> AGP_MAJOR_VERSION_SHIFT
) & 0xf;
696 bridge
->minor_version
= (ncapid
>> AGP_MINOR_VERSION_SHIFT
) & 0xf;
698 EXPORT_SYMBOL(get_agp_version
);
701 void agp_generic_enable(struct agp_bridge_data
*bridge
, u32 requested_mode
)
703 u32 bridge_agpstat
, temp
;
705 get_agp_version(agp_bridge
);
707 printk(KERN_INFO PFX
"Found an AGP %d.%d compliant device at %s.\n",
708 agp_bridge
->major_version
,
709 agp_bridge
->minor_version
,
710 pci_name(agp_bridge
->dev
));
712 pci_read_config_dword(agp_bridge
->dev
,
713 agp_bridge
->capndx
+ PCI_AGP_STATUS
, &bridge_agpstat
);
715 bridge_agpstat
= agp_collect_device_status(agp_bridge
, requested_mode
, bridge_agpstat
);
716 if (bridge_agpstat
== 0)
717 /* Something bad happened. FIXME: Return error code? */
720 bridge_agpstat
|= AGPSTAT_AGP_ENABLE
;
722 /* Do AGP version specific frobbing. */
723 if (bridge
->major_version
>= 3) {
724 if (bridge
->mode
& AGPSTAT_MODE_3_0
) {
725 /* If we have 3.5, we can do the isoch stuff. */
726 if (bridge
->minor_version
>= 5)
727 agp_3_5_enable(bridge
);
728 agp_device_command(bridge_agpstat
, TRUE
);
731 /* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/
732 bridge_agpstat
&= ~(7<<10) ;
733 pci_read_config_dword(bridge
->dev
,
734 bridge
->capndx
+AGPCTRL
, &temp
);
736 pci_write_config_dword(bridge
->dev
,
737 bridge
->capndx
+AGPCTRL
, temp
);
739 printk(KERN_INFO PFX
"Device is in legacy mode,"
740 " falling back to 2.x\n");
745 agp_device_command(bridge_agpstat
, FALSE
);
747 EXPORT_SYMBOL(agp_generic_enable
);
750 int agp_generic_create_gatt_table(struct agp_bridge_data
*bridge
)
761 /* The generic routines can't handle 2 level gatt's */
762 if (bridge
->driver
->size_type
== LVL2_APER_SIZE
)
766 i
= bridge
->aperture_size_idx
;
767 temp
= bridge
->current_size
;
768 size
= page_order
= num_entries
= 0;
770 if (bridge
->driver
->size_type
!= FIXED_APER_SIZE
) {
772 switch (bridge
->driver
->size_type
) {
774 size
= A_SIZE_8(temp
)->size
;
776 A_SIZE_8(temp
)->page_order
;
778 A_SIZE_8(temp
)->num_entries
;
781 size
= A_SIZE_16(temp
)->size
;
782 page_order
= A_SIZE_16(temp
)->page_order
;
783 num_entries
= A_SIZE_16(temp
)->num_entries
;
786 size
= A_SIZE_32(temp
)->size
;
787 page_order
= A_SIZE_32(temp
)->page_order
;
788 num_entries
= A_SIZE_32(temp
)->num_entries
;
790 /* This case will never really happen. */
791 case FIXED_APER_SIZE
:
794 size
= page_order
= num_entries
= 0;
798 table
= alloc_gatt_pages(page_order
);
802 switch (bridge
->driver
->size_type
) {
804 bridge
->current_size
= A_IDX8(bridge
);
807 bridge
->current_size
= A_IDX16(bridge
);
810 bridge
->current_size
= A_IDX32(bridge
);
812 /* This case will never really happen. */
813 case FIXED_APER_SIZE
:
816 bridge
->current_size
=
817 bridge
->current_size
;
820 temp
= bridge
->current_size
;
822 bridge
->aperture_size_idx
= i
;
824 } while (!table
&& (i
< bridge
->driver
->num_aperture_sizes
));
826 size
= ((struct aper_size_info_fixed
*) temp
)->size
;
827 page_order
= ((struct aper_size_info_fixed
*) temp
)->page_order
;
828 num_entries
= ((struct aper_size_info_fixed
*) temp
)->num_entries
;
829 table
= alloc_gatt_pages(page_order
);
835 table_end
= table
+ ((PAGE_SIZE
* (1 << page_order
)) - 1);
837 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
838 SetPageReserved(page
);
840 bridge
->gatt_table_real
= (u32
*) table
;
841 agp_gatt_table
= (void *)table
;
843 bridge
->driver
->cache_flush();
844 bridge
->gatt_table
= ioremap_nocache(virt_to_gart(table
),
845 (PAGE_SIZE
* (1 << page_order
)));
846 bridge
->driver
->cache_flush();
848 if (bridge
->gatt_table
== NULL
) {
849 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
850 ClearPageReserved(page
);
852 free_gatt_pages(table
, page_order
);
856 bridge
->gatt_bus_addr
= virt_to_gart(bridge
->gatt_table_real
);
858 /* AK: bogus, should encode addresses > 4GB */
859 for (i
= 0; i
< num_entries
; i
++) {
860 writel(bridge
->scratch_page
, bridge
->gatt_table
+i
);
861 readl(bridge
->gatt_table
+i
); /* PCI Posting. */
866 EXPORT_SYMBOL(agp_generic_create_gatt_table
);
868 int agp_generic_free_gatt_table(struct agp_bridge_data
*bridge
)
871 char *table
, *table_end
;
875 temp
= bridge
->current_size
;
877 switch (bridge
->driver
->size_type
) {
879 page_order
= A_SIZE_8(temp
)->page_order
;
882 page_order
= A_SIZE_16(temp
)->page_order
;
885 page_order
= A_SIZE_32(temp
)->page_order
;
887 case FIXED_APER_SIZE
:
888 page_order
= A_SIZE_FIX(temp
)->page_order
;
891 /* The generic routines can't deal with 2 level gatt's */
899 /* Do not worry about freeing memory, because if this is
900 * called, then all agp memory is deallocated and removed
903 iounmap(bridge
->gatt_table
);
904 table
= (char *) bridge
->gatt_table_real
;
905 table_end
= table
+ ((PAGE_SIZE
* (1 << page_order
)) - 1);
907 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
908 ClearPageReserved(page
);
910 free_gatt_pages(bridge
->gatt_table_real
, page_order
);
912 agp_gatt_table
= NULL
;
913 bridge
->gatt_table
= NULL
;
914 bridge
->gatt_table_real
= NULL
;
915 bridge
->gatt_bus_addr
= 0;
919 EXPORT_SYMBOL(agp_generic_free_gatt_table
);
922 int agp_generic_insert_memory(struct agp_memory
* mem
, off_t pg_start
, int type
)
928 struct agp_bridge_data
*bridge
;
930 bridge
= mem
->bridge
;
934 temp
= bridge
->current_size
;
936 switch (bridge
->driver
->size_type
) {
938 num_entries
= A_SIZE_8(temp
)->num_entries
;
941 num_entries
= A_SIZE_16(temp
)->num_entries
;
944 num_entries
= A_SIZE_32(temp
)->num_entries
;
946 case FIXED_APER_SIZE
:
947 num_entries
= A_SIZE_FIX(temp
)->num_entries
;
950 /* The generic routines can't deal with 2 level gatt's */
958 num_entries
-= agp_memory_reserved
/PAGE_SIZE
;
959 if (num_entries
< 0) num_entries
= 0;
961 if (type
!= 0 || mem
->type
!= 0) {
962 /* The generic routines know nothing of memory types */
967 if ((pg_start
+ mem
->page_count
) > num_entries
)
972 while (j
< (pg_start
+ mem
->page_count
)) {
973 if (!PGE_EMPTY(bridge
, readl(bridge
->gatt_table
+j
)))
978 if (mem
->is_flushed
== FALSE
) {
979 bridge
->driver
->cache_flush();
980 mem
->is_flushed
= TRUE
;
983 for (i
= 0, j
= pg_start
; i
< mem
->page_count
; i
++, j
++) {
984 writel(bridge
->driver
->mask_memory(bridge
, mem
->memory
[i
], mem
->type
), bridge
->gatt_table
+j
);
985 readl(bridge
->gatt_table
+j
); /* PCI Posting. */
988 bridge
->driver
->tlb_flush(mem
);
991 EXPORT_SYMBOL(agp_generic_insert_memory
);
994 int agp_generic_remove_memory(struct agp_memory
*mem
, off_t pg_start
, int type
)
997 struct agp_bridge_data
*bridge
;
999 bridge
= mem
->bridge
;
1003 if (type
!= 0 || mem
->type
!= 0) {
1004 /* The generic routines know nothing of memory types */
1008 /* AK: bogus, should encode addresses > 4GB */
1009 for (i
= pg_start
; i
< (mem
->page_count
+ pg_start
); i
++) {
1010 writel(bridge
->scratch_page
, bridge
->gatt_table
+i
);
1011 readl(bridge
->gatt_table
+i
); /* PCI Posting. */
1014 global_cache_flush();
1015 bridge
->driver
->tlb_flush(mem
);
1018 EXPORT_SYMBOL(agp_generic_remove_memory
);
1021 struct agp_memory
*agp_generic_alloc_by_type(size_t page_count
, int type
)
1025 EXPORT_SYMBOL(agp_generic_alloc_by_type
);
1028 void agp_generic_free_by_type(struct agp_memory
*curr
)
1030 vfree(curr
->memory
);
1031 agp_free_key(curr
->key
);
1034 EXPORT_SYMBOL(agp_generic_free_by_type
);
1038 * Basic Page Allocation Routines -
1039 * These routines handle page allocation and by default they reserve the allocated
1040 * memory. They also handle incrementing the current_memory_agp value, Which is checked
1041 * against a maximum value.
1044 void *agp_generic_alloc_page(struct agp_bridge_data
*bridge
)
1048 page
= alloc_page(GFP_KERNEL
);
1052 map_page_into_agp(page
);
1055 SetPageLocked(page
);
1056 atomic_inc(&agp_bridge
->current_memory_agp
);
1057 return page_address(page
);
1059 EXPORT_SYMBOL(agp_generic_alloc_page
);
1062 void agp_generic_destroy_page(void *addr
)
1069 page
= virt_to_page(addr
);
1070 unmap_page_from_agp(page
);
1073 free_page((unsigned long)addr
);
1074 atomic_dec(&agp_bridge
->current_memory_agp
);
1076 EXPORT_SYMBOL(agp_generic_destroy_page
);
1078 /* End Basic Page Allocation Routines */
1082 * agp_enable - initialise the agp point-to-point connection.
1084 * @mode: agp mode register value to configure with.
1086 void agp_enable(struct agp_bridge_data
*bridge
, u32 mode
)
1090 bridge
->driver
->agp_enable(bridge
, mode
);
1092 EXPORT_SYMBOL(agp_enable
);
1094 /* When we remove the global variable agp_bridge from all drivers
1095 * then agp_alloc_bridge and agp_generic_find_bridge need to be updated
1098 struct agp_bridge_data
*agp_generic_find_bridge(struct pci_dev
*pdev
)
1100 if (list_empty(&agp_bridges
))
1106 static void ipi_handler(void *null
)
1111 void global_cache_flush(void)
1113 if (on_each_cpu(ipi_handler
, NULL
, 1, 1) != 0)
1114 panic(PFX
"timed out waiting for the other CPUs!\n");
1116 EXPORT_SYMBOL(global_cache_flush
);
1118 unsigned long agp_generic_mask_memory(struct agp_bridge_data
*bridge
,
1119 unsigned long addr
, int type
)
1121 /* memory type is ignored in the generic routine */
1122 if (bridge
->driver
->masks
)
1123 return addr
| bridge
->driver
->masks
[0].mask
;
1127 EXPORT_SYMBOL(agp_generic_mask_memory
);
1130 * These functions are implemented according to the AGPv3 spec,
1131 * which covers implementation details that had previously been
1135 int agp3_generic_fetch_size(void)
1139 struct aper_size_info_16
*values
;
1141 pci_read_config_word(agp_bridge
->dev
, agp_bridge
->capndx
+AGPAPSIZE
, &temp_size
);
1142 values
= A_SIZE_16(agp_bridge
->driver
->aperture_sizes
);
1144 for (i
= 0; i
< agp_bridge
->driver
->num_aperture_sizes
; i
++) {
1145 if (temp_size
== values
[i
].size_value
) {
1146 agp_bridge
->previous_size
=
1147 agp_bridge
->current_size
= (void *) (values
+ i
);
1149 agp_bridge
->aperture_size_idx
= i
;
1150 return values
[i
].size
;
1155 EXPORT_SYMBOL(agp3_generic_fetch_size
);
1157 void agp3_generic_tlbflush(struct agp_memory
*mem
)
1160 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, &ctrl
);
1161 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, ctrl
& ~AGPCTRL_GTLBEN
);
1162 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, ctrl
);
1164 EXPORT_SYMBOL(agp3_generic_tlbflush
);
1166 int agp3_generic_configure(void)
1169 struct aper_size_info_16
*current_size
;
1171 current_size
= A_SIZE_16(agp_bridge
->current_size
);
1173 pci_read_config_dword(agp_bridge
->dev
, AGP_APBASE
, &temp
);
1174 agp_bridge
->gart_bus_addr
= (temp
& PCI_BASE_ADDRESS_MEM_MASK
);
1176 /* set aperture size */
1177 pci_write_config_word(agp_bridge
->dev
, agp_bridge
->capndx
+AGPAPSIZE
, current_size
->size_value
);
1178 /* set gart pointer */
1179 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPGARTLO
, agp_bridge
->gatt_bus_addr
);
1180 /* enable aperture and GTLB */
1181 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, &temp
);
1182 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, temp
| AGPCTRL_APERENB
| AGPCTRL_GTLBEN
);
1185 EXPORT_SYMBOL(agp3_generic_configure
);
1187 void agp3_generic_cleanup(void)
1190 pci_read_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, &ctrl
);
1191 pci_write_config_dword(agp_bridge
->dev
, agp_bridge
->capndx
+AGPCTRL
, ctrl
& ~AGPCTRL_APERENB
);
1193 EXPORT_SYMBOL(agp3_generic_cleanup
);
1195 struct aper_size_info_16 agp3_generic_sizes
[AGP_GENERIC_SIZES_ENTRIES
] =
1197 {4096, 1048576, 10,0x000},
1198 {2048, 524288, 9, 0x800},
1199 {1024, 262144, 8, 0xc00},
1200 { 512, 131072, 7, 0xe00},
1201 { 256, 65536, 6, 0xf00},
1202 { 128, 32768, 5, 0xf20},
1203 { 64, 16384, 4, 0xf30},
1204 { 32, 8192, 3, 0xf38},
1205 { 16, 4096, 2, 0xf3c},
1206 { 8, 2048, 1, 0xf3e},
1207 { 4, 1024, 0, 0xf3f}
1209 EXPORT_SYMBOL(agp3_generic_sizes
);