2 * Copyright (c) 2000 Doug Rabson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/dev/agp/agp.c,v 1.58 2007/11/12 21:51:36 jhb Exp $
27 * $DragonFly: src/sys/dev/agp/agp.c,v 1.30 2008/01/07 01:34:58 corecode Exp $
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/device.h>
36 #include <sys/malloc.h>
37 #include <sys/kernel.h>
39 #include <sys/agpio.h>
44 #include <bus/pci/pcivar.h>
45 #include <bus/pci/pcireg.h>
51 #include <vm/vm_object.h>
52 #include <vm/vm_page.h>
53 #include <vm/vm_pageout.h>
56 #include <machine/md_var.h>
58 MODULE_VERSION(agp
, 1);
60 MALLOC_DEFINE(M_AGP
, "agp", "AGP data structures");
62 #define CDEV_MAJOR 148
64 static d_open_t agp_open
;
65 static d_close_t agp_close
;
66 static d_ioctl_t agp_ioctl
;
67 static d_mmap_t agp_mmap
;
69 static struct dev_ops agp_ops
= {
70 { "agp", CDEV_MAJOR
, D_TTY
},
77 static devclass_t agp_devclass
;
78 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
80 /* Helper functions for implementing chipset mini drivers. */
85 #if defined(__i386__) || defined(__amd64__)
91 agp_find_caps(device_t dev
)
95 if (pci_find_extcap(dev
, PCIY_AGP
, &capreg
) != 0)
101 * Find an AGP display device (if any).
104 agp_find_display(void)
106 devclass_t pci
= devclass_find("pci");
107 device_t bus
, dev
= 0;
109 int busnum
, numkids
, i
;
111 for (busnum
= 0; busnum
< devclass_get_maxunit(pci
); busnum
++) {
112 bus
= devclass_get_device(pci
, busnum
);
115 device_get_children(bus
, &kids
, &numkids
);
116 for (i
= 0; i
< numkids
; i
++) {
118 if (pci_get_class(dev
) == PCIC_DISPLAY
119 && pci_get_subclass(dev
) == PCIS_DISPLAY_VGA
)
120 if (agp_find_caps(dev
)) {
133 agp_alloc_gatt(device_t dev
)
135 u_int32_t apsize
= AGP_GET_APERTURE(dev
);
136 u_int32_t entries
= apsize
>> AGP_PAGE_SHIFT
;
137 struct agp_gatt
*gatt
;
141 "allocating GATT for aperture of size %dM\n",
142 apsize
/ (1024*1024));
145 device_printf(dev
, "bad aperture size\n");
149 gatt
= kmalloc(sizeof(struct agp_gatt
), M_AGP
, M_INTWAIT
);
150 gatt
->ag_entries
= entries
;
151 gatt
->ag_virtual
= contigmalloc(entries
* sizeof(u_int32_t
), M_AGP
,
152 M_WAITOK
|M_ZERO
, 0, ~0, PAGE_SIZE
, 0);
153 if (!gatt
->ag_virtual
) {
155 device_printf(dev
, "contiguous allocation failed\n");
159 gatt
->ag_physical
= vtophys((vm_offset_t
) gatt
->ag_virtual
);
166 agp_free_gatt(struct agp_gatt
*gatt
)
168 contigfree(gatt
->ag_virtual
,
169 gatt
->ag_entries
* sizeof(u_int32_t
), M_AGP
);
173 static u_int agp_max
[][2] = {
184 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
187 * Sets the PCI resource which represents the AGP aperture.
189 * If not called, the default AGP aperture resource of AGP_APBASE will
190 * be used. Must be called before agp_generic_attach().
193 agp_set_aperture_resource(device_t dev
, int rid
)
195 struct agp_softc
*sc
= device_get_softc(dev
);
197 sc
->as_aperture_rid
= rid
;
201 agp_generic_attach(device_t dev
)
203 struct agp_softc
*sc
= device_get_softc(dev
);
208 * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
209 * because the kernel doesn't need to map it.
211 if (sc
->as_aperture_rid
== 0)
212 sc
->as_aperture_rid
= AGP_APBASE
;
214 sc
->as_aperture
= bus_alloc_resource_any(dev
, SYS_RES_MEMORY
,
215 &sc
->as_aperture_rid
, RF_SHAREABLE
);
216 if (!sc
->as_aperture
)
220 * Work out an upper bound for agp memory allocation. This
221 * uses a heurisitc table from the Linux driver.
223 memsize
= ptoa(Maxmem
) >> 20;
224 for (i
= 0; i
< agp_max_size
; i
++) {
225 if (memsize
<= agp_max
[i
][0])
228 if (i
== agp_max_size
) i
= agp_max_size
- 1;
229 sc
->as_maxmem
= agp_max
[i
][1] << 20U;
232 * The lock is used to prevent re-entry to
233 * agp_generic_bind_memory() since that function can sleep.
235 lockinit(&sc
->as_lock
, "agplk", 0, 0);
238 * Initialise stuff for the userland device.
240 agp_devclass
= devclass_find("agp");
241 TAILQ_INIT(&sc
->as_memory
);
244 make_dev(&agp_ops
, device_get_unit(dev
), UID_ROOT
, GID_WHEEL
,
251 agp_free_cdev(device_t dev
)
253 dev_ops_remove_minor(&agp_ops
, device_get_unit(dev
));
257 agp_free_res(device_t dev
)
259 struct agp_softc
*sc
= device_get_softc(dev
);
261 bus_release_resource(dev
, SYS_RES_MEMORY
, sc
->as_aperture_rid
,
267 agp_generic_detach(device_t dev
)
275 * Default AGP aperture size detection which simply returns the size of
276 * the aperture's PCI resource.
279 agp_generic_get_aperture(device_t dev
)
281 struct agp_softc
*sc
= device_get_softc(dev
);
283 return rman_get_size(sc
->as_aperture
);
287 * Default AGP aperture size setting function, which simply doesn't allow
288 * changes to resource size.
291 agp_generic_set_aperture(device_t dev
, u_int32_t aperture
)
293 u_int32_t current_aperture
;
295 current_aperture
= AGP_GET_APERTURE(dev
);
296 if (current_aperture
!= aperture
)
303 * This does the enable logic for v3, with the same topology
304 * restrictions as in place for v2 -- one bus, one device on the bus.
307 agp_v3_enable(device_t dev
, device_t mdev
, u_int32_t mode
)
309 u_int32_t tstatus
, mstatus
;
311 int rq
, sba
, fw
, rate
, arqsz
, cal
;
313 tstatus
= pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
314 mstatus
= pci_read_config(mdev
, agp_find_caps(mdev
) + AGP_STATUS
, 4);
316 /* Set RQ to the min of mode, tstatus and mstatus */
317 rq
= AGP_MODE_GET_RQ(mode
);
318 if (AGP_MODE_GET_RQ(tstatus
) < rq
)
319 rq
= AGP_MODE_GET_RQ(tstatus
);
320 if (AGP_MODE_GET_RQ(mstatus
) < rq
)
321 rq
= AGP_MODE_GET_RQ(mstatus
);
324 * ARQSZ - Set the value to the maximum one.
325 * Don't allow the mode register to override values.
327 arqsz
= AGP_MODE_GET_ARQSZ(mode
);
328 if (AGP_MODE_GET_ARQSZ(tstatus
) > rq
)
329 rq
= AGP_MODE_GET_ARQSZ(tstatus
);
330 if (AGP_MODE_GET_ARQSZ(mstatus
) > rq
)
331 rq
= AGP_MODE_GET_ARQSZ(mstatus
);
333 /* Calibration cycle - don't allow override by mode register */
334 cal
= AGP_MODE_GET_CAL(tstatus
);
335 if (AGP_MODE_GET_CAL(mstatus
) < cal
)
336 cal
= AGP_MODE_GET_CAL(mstatus
);
338 /* SBA must be supported for AGP v3. */
341 /* Set FW if all three support it. */
342 fw
= (AGP_MODE_GET_FW(tstatus
)
343 & AGP_MODE_GET_FW(mstatus
)
344 & AGP_MODE_GET_FW(mode
));
346 /* Figure out the max rate */
347 rate
= (AGP_MODE_GET_RATE(tstatus
)
348 & AGP_MODE_GET_RATE(mstatus
)
349 & AGP_MODE_GET_RATE(mode
));
350 if (rate
& AGP_MODE_V3_RATE_8x
)
351 rate
= AGP_MODE_V3_RATE_8x
;
353 rate
= AGP_MODE_V3_RATE_4x
;
355 device_printf(dev
, "Setting AGP v3 mode %d\n", rate
* 4);
357 pci_write_config(dev
, agp_find_caps(dev
) + AGP_COMMAND
, 0, 4);
359 /* Construct the new mode word and tell the hardware */
361 command
= AGP_MODE_SET_RQ(0, rq
);
362 command
= AGP_MODE_SET_ARQSZ(command
, arqsz
);
363 command
= AGP_MODE_SET_CAL(command
, cal
);
364 command
= AGP_MODE_SET_SBA(command
, sba
);
365 command
= AGP_MODE_SET_FW(command
, fw
);
366 command
= AGP_MODE_SET_RATE(command
, rate
);
367 command
= AGP_MODE_SET_MODE_3(command
, 1);
368 command
= AGP_MODE_SET_AGP(command
, 1);
369 pci_write_config(dev
, agp_find_caps(dev
) + AGP_COMMAND
, command
, 4);
370 pci_write_config(mdev
, agp_find_caps(mdev
) + AGP_COMMAND
, command
, 4);
376 agp_v2_enable(device_t dev
, device_t mdev
, u_int32_t mode
)
378 u_int32_t tstatus
, mstatus
;
380 int rq
, sba
, fw
, rate
;
382 tstatus
= pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
383 mstatus
= pci_read_config(mdev
, agp_find_caps(mdev
) + AGP_STATUS
, 4);
385 /* Set RQ to the min of mode, tstatus and mstatus */
386 rq
= AGP_MODE_GET_RQ(mode
);
387 if (AGP_MODE_GET_RQ(tstatus
) < rq
)
388 rq
= AGP_MODE_GET_RQ(tstatus
);
389 if (AGP_MODE_GET_RQ(mstatus
) < rq
)
390 rq
= AGP_MODE_GET_RQ(mstatus
);
392 /* Set SBA if all three can deal with SBA */
393 sba
= (AGP_MODE_GET_SBA(tstatus
)
394 & AGP_MODE_GET_SBA(mstatus
)
395 & AGP_MODE_GET_SBA(mode
));
398 fw
= (AGP_MODE_GET_FW(tstatus
)
399 & AGP_MODE_GET_FW(mstatus
)
400 & AGP_MODE_GET_FW(mode
));
402 /* Figure out the max rate */
403 rate
= (AGP_MODE_GET_RATE(tstatus
)
404 & AGP_MODE_GET_RATE(mstatus
)
405 & AGP_MODE_GET_RATE(mode
));
406 if (rate
& AGP_MODE_V2_RATE_4x
)
407 rate
= AGP_MODE_V2_RATE_4x
;
408 else if (rate
& AGP_MODE_V2_RATE_2x
)
409 rate
= AGP_MODE_V2_RATE_2x
;
411 rate
= AGP_MODE_V2_RATE_1x
;
413 device_printf(dev
, "Setting AGP v2 mode %d\n", rate
);
415 /* Construct the new mode word and tell the hardware */
417 command
= AGP_MODE_SET_RQ(0, rq
);
418 command
= AGP_MODE_SET_SBA(command
, sba
);
419 command
= AGP_MODE_SET_FW(command
, fw
);
420 command
= AGP_MODE_SET_RATE(command
, rate
);
421 command
= AGP_MODE_SET_AGP(command
, 1);
422 pci_write_config(dev
, agp_find_caps(dev
) + AGP_COMMAND
, command
, 4);
423 pci_write_config(mdev
, agp_find_caps(mdev
) + AGP_COMMAND
, command
, 4);
429 agp_generic_enable(device_t dev
, u_int32_t mode
)
431 device_t mdev
= agp_find_display();
432 u_int32_t tstatus
, mstatus
;
435 AGP_DPF("can't find display\n");
439 tstatus
= pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
440 mstatus
= pci_read_config(mdev
, agp_find_caps(mdev
) + AGP_STATUS
, 4);
443 * Check display and bridge for AGP v3 support. AGP v3 allows
444 * more variety in topology than v2, e.g. multiple AGP devices
445 * attached to one bridge, or multiple AGP bridges in one
446 * system. This doesn't attempt to address those situations,
447 * but should work fine for a classic single AGP slot system
450 if (AGP_MODE_GET_MODE_3(mode
) &&
451 AGP_MODE_GET_MODE_3(tstatus
) &&
452 AGP_MODE_GET_MODE_3(mstatus
))
453 return (agp_v3_enable(dev
, mdev
, mode
));
455 return (agp_v2_enable(dev
, mdev
, mode
));
459 agp_generic_alloc_memory(device_t dev
, int type
, vm_size_t size
)
461 struct agp_softc
*sc
= device_get_softc(dev
);
462 struct agp_memory
*mem
;
464 if ((size
& (AGP_PAGE_SIZE
- 1)) != 0)
467 if (sc
->as_allocated
+ size
> sc
->as_maxmem
)
471 kprintf("agp_generic_alloc_memory: unsupported type %d\n",
476 mem
= kmalloc(sizeof *mem
, M_AGP
, M_INTWAIT
);
477 mem
->am_id
= sc
->as_nextid
++;
480 mem
->am_obj
= vm_object_allocate(OBJT_DEFAULT
, atop(round_page(size
)));
481 mem
->am_physical
= 0;
483 mem
->am_is_bound
= 0;
484 TAILQ_INSERT_TAIL(&sc
->as_memory
, mem
, am_link
);
485 sc
->as_allocated
+= size
;
491 agp_generic_free_memory(device_t dev
, struct agp_memory
*mem
)
493 struct agp_softc
*sc
= device_get_softc(dev
);
495 if (mem
->am_is_bound
)
498 sc
->as_allocated
-= mem
->am_size
;
499 TAILQ_REMOVE(&sc
->as_memory
, mem
, am_link
);
500 vm_object_deallocate(mem
->am_obj
);
506 agp_generic_bind_memory(device_t dev
, struct agp_memory
*mem
,
509 struct agp_softc
*sc
= device_get_softc(dev
);
514 lockmgr(&sc
->as_lock
, LK_EXCLUSIVE
);
516 if (mem
->am_is_bound
) {
517 device_printf(dev
, "memory already bound\n");
518 lockmgr(&sc
->as_lock
, LK_RELEASE
);
523 || (offset
& (AGP_PAGE_SIZE
- 1)) != 0
524 || offset
+ mem
->am_size
> AGP_GET_APERTURE(dev
)) {
525 device_printf(dev
, "binding memory at bad offset %#x,%#x,%#x\n",
526 (int) offset
, (int)mem
->am_size
,
527 (int)AGP_GET_APERTURE(dev
));
528 kprintf("Check BIOS's aperature size vs X\n");
529 lockmgr(&sc
->as_lock
, LK_RELEASE
);
534 * Bind the individual pages and flush the chipset's
537 for (i
= 0; i
< mem
->am_size
; i
+= PAGE_SIZE
) {
539 * Find a page from the object and wire it
540 * down. This page will be mapped using one or more
541 * entries in the GATT (assuming that PAGE_SIZE >=
542 * AGP_PAGE_SIZE. If this is the first call to bind,
543 * the pages will be allocated and zeroed.
545 m
= vm_page_grab(mem
->am_obj
, OFF_TO_IDX(i
),
546 VM_ALLOC_NORMAL
| VM_ALLOC_ZERO
| VM_ALLOC_RETRY
);
547 if ((m
->flags
& PG_ZERO
) == 0)
548 vm_page_zero_fill(m
);
549 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m
));
553 * Install entries in the GATT, making sure that if
554 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
555 * aligned to PAGE_SIZE, we don't modify too many GATT
558 for (j
= 0; j
< PAGE_SIZE
&& i
+ j
< mem
->am_size
;
559 j
+= AGP_PAGE_SIZE
) {
560 vm_offset_t pa
= VM_PAGE_TO_PHYS(m
) + j
;
561 AGP_DPF("binding offset %#x to pa %#x\n",
563 error
= AGP_BIND_PAGE(dev
, offset
+ i
+ j
, pa
);
566 * Bail out. Reverse all the mappings
567 * and unwire the pages.
570 for (k
= 0; k
< i
+ j
; k
+= AGP_PAGE_SIZE
)
571 AGP_UNBIND_PAGE(dev
, offset
+ k
);
572 for (k
= 0; k
<= i
; k
+= PAGE_SIZE
) {
573 m
= vm_page_lookup(mem
->am_obj
,
575 vm_page_unwire(m
, 0);
577 lockmgr(&sc
->as_lock
, LK_RELEASE
);
585 * Flush the cpu cache since we are providing a new mapping
591 * Make sure the chipset gets the new mappings.
595 mem
->am_offset
= offset
;
596 mem
->am_is_bound
= 1;
598 lockmgr(&sc
->as_lock
, LK_RELEASE
);
604 agp_generic_unbind_memory(device_t dev
, struct agp_memory
*mem
)
606 struct agp_softc
*sc
= device_get_softc(dev
);
610 lockmgr(&sc
->as_lock
, LK_EXCLUSIVE
);
612 if (!mem
->am_is_bound
) {
613 device_printf(dev
, "memory is not bound\n");
614 lockmgr(&sc
->as_lock
, LK_RELEASE
);
620 * Unbind the individual pages and flush the chipset's
621 * TLB. Unwire the pages so they can be swapped.
623 for (i
= 0; i
< mem
->am_size
; i
+= AGP_PAGE_SIZE
)
624 AGP_UNBIND_PAGE(dev
, mem
->am_offset
+ i
);
625 for (i
= 0; i
< mem
->am_size
; i
+= PAGE_SIZE
) {
626 m
= vm_page_lookup(mem
->am_obj
, atop(i
));
627 vm_page_unwire(m
, 0);
634 mem
->am_is_bound
= 0;
636 lockmgr(&sc
->as_lock
, LK_RELEASE
);
641 /* Helper functions for implementing user/kernel api */
644 agp_acquire_helper(device_t dev
, enum agp_acquire_state state
)
646 struct agp_softc
*sc
= device_get_softc(dev
);
648 if (sc
->as_state
!= AGP_ACQUIRE_FREE
)
650 sc
->as_state
= state
;
656 agp_release_helper(device_t dev
, enum agp_acquire_state state
)
658 struct agp_softc
*sc
= device_get_softc(dev
);
660 if (sc
->as_state
== AGP_ACQUIRE_FREE
)
663 if (sc
->as_state
!= state
)
666 sc
->as_state
= AGP_ACQUIRE_FREE
;
670 static struct agp_memory
*
671 agp_find_memory(device_t dev
, int id
)
673 struct agp_softc
*sc
= device_get_softc(dev
);
674 struct agp_memory
*mem
;
676 AGP_DPF("searching for memory block %d\n", id
);
677 TAILQ_FOREACH(mem
, &sc
->as_memory
, am_link
) {
678 AGP_DPF("considering memory block %d\n", mem
->am_id
);
679 if (mem
->am_id
== id
)
685 /* Implementation of the userland ioctl api */
688 agp_info_user(device_t dev
, agp_info
*info
)
690 struct agp_softc
*sc
= device_get_softc(dev
);
692 bzero(info
, sizeof *info
);
693 info
->bridge_id
= pci_get_devid(dev
);
695 pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
696 info
->aper_base
= rman_get_start(sc
->as_aperture
);
697 info
->aper_size
= AGP_GET_APERTURE(dev
) >> 20;
698 info
->pg_total
= info
->pg_system
= sc
->as_maxmem
>> AGP_PAGE_SHIFT
;
699 info
->pg_used
= sc
->as_allocated
>> AGP_PAGE_SHIFT
;
705 agp_setup_user(device_t dev
, agp_setup
*setup
)
707 return AGP_ENABLE(dev
, setup
->agp_mode
);
711 agp_allocate_user(device_t dev
, agp_allocate
*alloc
)
713 struct agp_memory
*mem
;
715 mem
= AGP_ALLOC_MEMORY(dev
,
717 alloc
->pg_count
<< AGP_PAGE_SHIFT
);
719 alloc
->key
= mem
->am_id
;
720 alloc
->physical
= mem
->am_physical
;
728 agp_deallocate_user(device_t dev
, int id
)
730 struct agp_memory
*mem
= agp_find_memory(dev
, id
);
733 AGP_FREE_MEMORY(dev
, mem
);
741 agp_bind_user(device_t dev
, agp_bind
*bind
)
743 struct agp_memory
*mem
= agp_find_memory(dev
, bind
->key
);
748 return AGP_BIND_MEMORY(dev
, mem
, bind
->pg_start
<< AGP_PAGE_SHIFT
);
752 agp_unbind_user(device_t dev
, agp_unbind
*unbind
)
754 struct agp_memory
*mem
= agp_find_memory(dev
, unbind
->key
);
759 return AGP_UNBIND_MEMORY(dev
, mem
);
763 agp_open(struct dev_open_args
*ap
)
765 cdev_t kdev
= ap
->a_head
.a_dev
;
766 device_t dev
= KDEV2DEV(kdev
);
767 struct agp_softc
*sc
= device_get_softc(dev
);
769 if (!sc
->as_isopen
) {
778 agp_close(struct dev_close_args
*ap
)
780 cdev_t kdev
= ap
->a_head
.a_dev
;
781 device_t dev
= KDEV2DEV(kdev
);
782 struct agp_softc
*sc
= device_get_softc(dev
);
783 struct agp_memory
*mem
;
786 * Clear the GATT and force release on last close
788 while ((mem
= TAILQ_FIRST(&sc
->as_memory
)) != 0) {
789 if (mem
->am_is_bound
)
790 AGP_UNBIND_MEMORY(dev
, mem
);
791 AGP_FREE_MEMORY(dev
, mem
);
793 if (sc
->as_state
== AGP_ACQUIRE_USER
)
794 agp_release_helper(dev
, AGP_ACQUIRE_USER
);
802 agp_ioctl(struct dev_ioctl_args
*ap
)
804 cdev_t kdev
= ap
->a_head
.a_dev
;
805 device_t dev
= KDEV2DEV(kdev
);
809 return agp_info_user(dev
, (agp_info
*)ap
->a_data
);
812 return agp_acquire_helper(dev
, AGP_ACQUIRE_USER
);
815 return agp_release_helper(dev
, AGP_ACQUIRE_USER
);
818 return agp_setup_user(dev
, (agp_setup
*)ap
->a_data
);
820 case AGPIOC_ALLOCATE
:
821 return agp_allocate_user(dev
, (agp_allocate
*)ap
->a_data
);
823 case AGPIOC_DEALLOCATE
:
824 return agp_deallocate_user(dev
, *(int *)ap
->a_data
);
827 return agp_bind_user(dev
, (agp_bind
*)ap
->a_data
);
830 return agp_unbind_user(dev
, (agp_unbind
*)ap
->a_data
);
838 agp_mmap(struct dev_mmap_args
*ap
)
840 cdev_t kdev
= ap
->a_head
.a_dev
;
841 device_t dev
= KDEV2DEV(kdev
);
842 struct agp_softc
*sc
= device_get_softc(dev
);
844 if (ap
->a_offset
> AGP_GET_APERTURE(dev
))
846 ap
->a_result
= atop(rman_get_start(sc
->as_aperture
) + ap
->a_offset
);
850 /* Implementation of the kernel api */
853 agp_find_device(void)
855 device_t
*children
, child
;
860 if (devclass_get_devices(agp_devclass
, &children
, &count
) != 0)
863 for (i
= 0; i
< count
; i
++) {
864 if (device_is_attached(children
[i
])) {
869 kfree(children
, M_TEMP
);
873 enum agp_acquire_state
874 agp_state(device_t dev
)
876 struct agp_softc
*sc
= device_get_softc(dev
);
881 agp_get_info(device_t dev
, struct agp_info
*info
)
883 struct agp_softc
*sc
= device_get_softc(dev
);
886 pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
887 info
->ai_aperture_base
= rman_get_start(sc
->as_aperture
);
888 info
->ai_aperture_size
= rman_get_size(sc
->as_aperture
);
889 info
->ai_memory_allowed
= sc
->as_maxmem
;
890 info
->ai_memory_used
= sc
->as_allocated
;
894 agp_acquire(device_t dev
)
896 return agp_acquire_helper(dev
, AGP_ACQUIRE_KERNEL
);
900 agp_release(device_t dev
)
902 return agp_release_helper(dev
, AGP_ACQUIRE_KERNEL
);
906 agp_enable(device_t dev
, u_int32_t mode
)
908 return AGP_ENABLE(dev
, mode
);
911 void *agp_alloc_memory(device_t dev
, int type
, vm_size_t bytes
)
913 return (void *) AGP_ALLOC_MEMORY(dev
, type
, bytes
);
916 void agp_free_memory(device_t dev
, void *handle
)
918 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
919 AGP_FREE_MEMORY(dev
, mem
);
922 int agp_bind_memory(device_t dev
, void *handle
, vm_offset_t offset
)
924 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
925 return AGP_BIND_MEMORY(dev
, mem
, offset
);
928 int agp_unbind_memory(device_t dev
, void *handle
)
930 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
931 return AGP_UNBIND_MEMORY(dev
, mem
);
934 void agp_memory_info(device_t dev
, void *handle
, struct
937 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
939 mi
->ami_size
= mem
->am_size
;
940 mi
->ami_physical
= mem
->am_physical
;
941 mi
->ami_offset
= mem
->am_offset
;
942 mi
->ami_is_bound
= mem
->am_is_bound
;