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 $
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/device.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
40 #include <sys/agpio.h>
45 #include <bus/pci/pcivar.h>
46 #include <bus/pci/pcireg.h>
52 #include <vm/vm_object.h>
53 #include <vm/vm_page.h>
54 #include <vm/vm_pageout.h>
57 #include <machine/md_var.h>
59 MODULE_VERSION(agp
, 1);
61 MALLOC_DEFINE(M_AGP
, "agp", "AGP data structures");
63 #define CDEV_MAJOR 148
65 static d_open_t agp_open
;
66 static d_close_t agp_close
;
67 static d_ioctl_t agp_ioctl
;
68 static d_mmap_t agp_mmap
;
70 static struct dev_ops agp_ops
= {
71 { "agp", CDEV_MAJOR
, D_TTY
},
78 static devclass_t agp_devclass
;
79 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
81 /* Helper functions for implementing chipset mini drivers. */
86 #if defined(__i386__) || defined(__amd64__)
92 agp_find_caps(device_t dev
)
96 if (pci_find_extcap(dev
, PCIY_AGP
, &capreg
) != 0)
102 * Find an AGP display device (if any).
105 agp_find_display(void)
107 devclass_t pci
= devclass_find("pci");
108 device_t bus
, dev
= 0;
110 int busnum
, numkids
, i
;
112 for (busnum
= 0; busnum
< devclass_get_maxunit(pci
); busnum
++) {
113 bus
= devclass_get_device(pci
, busnum
);
116 device_get_children(bus
, &kids
, &numkids
);
117 for (i
= 0; i
< numkids
; i
++) {
119 if (pci_get_class(dev
) == PCIC_DISPLAY
120 && pci_get_subclass(dev
) == PCIS_DISPLAY_VGA
)
121 if (agp_find_caps(dev
)) {
134 agp_alloc_gatt(device_t dev
)
136 u_int32_t apsize
= AGP_GET_APERTURE(dev
);
137 u_int32_t entries
= apsize
>> AGP_PAGE_SHIFT
;
138 struct agp_gatt
*gatt
;
142 "allocating GATT for aperture of size %dM\n",
143 apsize
/ (1024*1024));
146 device_printf(dev
, "bad aperture size\n");
150 gatt
= kmalloc(sizeof(struct agp_gatt
), M_AGP
, M_INTWAIT
);
151 gatt
->ag_entries
= entries
;
152 gatt
->ag_virtual
= contigmalloc(entries
* sizeof(u_int32_t
), M_AGP
,
153 M_WAITOK
|M_ZERO
, 0, ~0, PAGE_SIZE
, 0);
154 if (!gatt
->ag_virtual
) {
156 device_printf(dev
, "contiguous allocation failed\n");
160 gatt
->ag_physical
= vtophys((vm_offset_t
) gatt
->ag_virtual
);
167 agp_free_gatt(struct agp_gatt
*gatt
)
169 contigfree(gatt
->ag_virtual
,
170 gatt
->ag_entries
* sizeof(u_int32_t
), M_AGP
);
174 static u_int agp_max
[][2] = {
185 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
188 * Sets the PCI resource which represents the AGP aperture.
190 * If not called, the default AGP aperture resource of AGP_APBASE will
191 * be used. Must be called before agp_generic_attach().
194 agp_set_aperture_resource(device_t dev
, int rid
)
196 struct agp_softc
*sc
= device_get_softc(dev
);
198 sc
->as_aperture_rid
= rid
;
202 agp_generic_attach(device_t dev
)
204 struct agp_softc
*sc
= device_get_softc(dev
);
209 * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
210 * because the kernel doesn't need to map it.
212 if (sc
->as_aperture_rid
== 0)
213 sc
->as_aperture_rid
= AGP_APBASE
;
215 sc
->as_aperture
= bus_alloc_resource_any(dev
, SYS_RES_MEMORY
,
216 &sc
->as_aperture_rid
, RF_SHAREABLE
);
217 if (!sc
->as_aperture
)
221 * Work out an upper bound for agp memory allocation. This
222 * uses a heurisitc table from the Linux driver.
224 memsize
= ptoa(Maxmem
) >> 20;
225 for (i
= 0; i
< agp_max_size
; i
++) {
226 if (memsize
<= agp_max
[i
][0])
229 if (i
== agp_max_size
) i
= agp_max_size
- 1;
230 sc
->as_maxmem
= agp_max
[i
][1] << 20U;
233 * The lock is used to prevent re-entry to
234 * agp_generic_bind_memory() since that function can sleep.
236 lockinit(&sc
->as_lock
, "agplk", 0, 0);
239 * Initialise stuff for the userland device.
241 agp_devclass
= devclass_find("agp");
242 TAILQ_INIT(&sc
->as_memory
);
245 dev_ops_add(&agp_ops
, -1, device_get_unit(dev
));
246 make_dev(&agp_ops
, device_get_unit(dev
), UID_ROOT
, GID_WHEEL
,
253 agp_free_cdev(device_t dev
)
255 dev_ops_remove(&agp_ops
, -1, device_get_unit(dev
));
259 agp_free_res(device_t dev
)
261 struct agp_softc
*sc
= device_get_softc(dev
);
263 bus_release_resource(dev
, SYS_RES_MEMORY
, sc
->as_aperture_rid
,
269 agp_generic_detach(device_t dev
)
277 * Default AGP aperture size detection which simply returns the size of
278 * the aperture's PCI resource.
281 agp_generic_get_aperture(device_t dev
)
283 struct agp_softc
*sc
= device_get_softc(dev
);
285 return rman_get_size(sc
->as_aperture
);
289 * Default AGP aperture size setting function, which simply doesn't allow
290 * changes to resource size.
293 agp_generic_set_aperture(device_t dev
, u_int32_t aperture
)
295 u_int32_t current_aperture
;
297 current_aperture
= AGP_GET_APERTURE(dev
);
298 if (current_aperture
!= aperture
)
305 * This does the enable logic for v3, with the same topology
306 * restrictions as in place for v2 -- one bus, one device on the bus.
309 agp_v3_enable(device_t dev
, device_t mdev
, u_int32_t mode
)
311 u_int32_t tstatus
, mstatus
;
313 int rq
, sba
, fw
, rate
, arqsz
, cal
;
315 tstatus
= pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
316 mstatus
= pci_read_config(mdev
, agp_find_caps(mdev
) + AGP_STATUS
, 4);
318 /* Set RQ to the min of mode, tstatus and mstatus */
319 rq
= AGP_MODE_GET_RQ(mode
);
320 if (AGP_MODE_GET_RQ(tstatus
) < rq
)
321 rq
= AGP_MODE_GET_RQ(tstatus
);
322 if (AGP_MODE_GET_RQ(mstatus
) < rq
)
323 rq
= AGP_MODE_GET_RQ(mstatus
);
326 * ARQSZ - Set the value to the maximum one.
327 * Don't allow the mode register to override values.
329 arqsz
= AGP_MODE_GET_ARQSZ(mode
);
330 if (AGP_MODE_GET_ARQSZ(tstatus
) > rq
)
331 rq
= AGP_MODE_GET_ARQSZ(tstatus
);
332 if (AGP_MODE_GET_ARQSZ(mstatus
) > rq
)
333 rq
= AGP_MODE_GET_ARQSZ(mstatus
);
335 /* Calibration cycle - don't allow override by mode register */
336 cal
= AGP_MODE_GET_CAL(tstatus
);
337 if (AGP_MODE_GET_CAL(mstatus
) < cal
)
338 cal
= AGP_MODE_GET_CAL(mstatus
);
340 /* SBA must be supported for AGP v3. */
343 /* Set FW if all three support it. */
344 fw
= (AGP_MODE_GET_FW(tstatus
)
345 & AGP_MODE_GET_FW(mstatus
)
346 & AGP_MODE_GET_FW(mode
));
348 /* Figure out the max rate */
349 rate
= (AGP_MODE_GET_RATE(tstatus
)
350 & AGP_MODE_GET_RATE(mstatus
)
351 & AGP_MODE_GET_RATE(mode
));
352 if (rate
& AGP_MODE_V3_RATE_8x
)
353 rate
= AGP_MODE_V3_RATE_8x
;
355 rate
= AGP_MODE_V3_RATE_4x
;
357 device_printf(dev
, "Setting AGP v3 mode %d\n", rate
* 4);
359 pci_write_config(dev
, agp_find_caps(dev
) + AGP_COMMAND
, 0, 4);
361 /* Construct the new mode word and tell the hardware */
363 command
= AGP_MODE_SET_RQ(0, rq
);
364 command
= AGP_MODE_SET_ARQSZ(command
, arqsz
);
365 command
= AGP_MODE_SET_CAL(command
, cal
);
366 command
= AGP_MODE_SET_SBA(command
, sba
);
367 command
= AGP_MODE_SET_FW(command
, fw
);
368 command
= AGP_MODE_SET_RATE(command
, rate
);
369 command
= AGP_MODE_SET_MODE_3(command
, 1);
370 command
= AGP_MODE_SET_AGP(command
, 1);
371 pci_write_config(dev
, agp_find_caps(dev
) + AGP_COMMAND
, command
, 4);
372 pci_write_config(mdev
, agp_find_caps(mdev
) + AGP_COMMAND
, command
, 4);
378 agp_v2_enable(device_t dev
, device_t mdev
, u_int32_t mode
)
380 u_int32_t tstatus
, mstatus
;
382 int rq
, sba
, fw
, rate
;
384 tstatus
= pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
385 mstatus
= pci_read_config(mdev
, agp_find_caps(mdev
) + AGP_STATUS
, 4);
387 /* Set RQ to the min of mode, tstatus and mstatus */
388 rq
= AGP_MODE_GET_RQ(mode
);
389 if (AGP_MODE_GET_RQ(tstatus
) < rq
)
390 rq
= AGP_MODE_GET_RQ(tstatus
);
391 if (AGP_MODE_GET_RQ(mstatus
) < rq
)
392 rq
= AGP_MODE_GET_RQ(mstatus
);
394 /* Set SBA if all three can deal with SBA */
395 sba
= (AGP_MODE_GET_SBA(tstatus
)
396 & AGP_MODE_GET_SBA(mstatus
)
397 & AGP_MODE_GET_SBA(mode
));
400 fw
= (AGP_MODE_GET_FW(tstatus
)
401 & AGP_MODE_GET_FW(mstatus
)
402 & AGP_MODE_GET_FW(mode
));
404 /* Figure out the max rate */
405 rate
= (AGP_MODE_GET_RATE(tstatus
)
406 & AGP_MODE_GET_RATE(mstatus
)
407 & AGP_MODE_GET_RATE(mode
));
408 if (rate
& AGP_MODE_V2_RATE_4x
)
409 rate
= AGP_MODE_V2_RATE_4x
;
410 else if (rate
& AGP_MODE_V2_RATE_2x
)
411 rate
= AGP_MODE_V2_RATE_2x
;
413 rate
= AGP_MODE_V2_RATE_1x
;
415 device_printf(dev
, "Setting AGP v2 mode %d\n", rate
);
417 /* Construct the new mode word and tell the hardware */
419 command
= AGP_MODE_SET_RQ(0, rq
);
420 command
= AGP_MODE_SET_SBA(command
, sba
);
421 command
= AGP_MODE_SET_FW(command
, fw
);
422 command
= AGP_MODE_SET_RATE(command
, rate
);
423 command
= AGP_MODE_SET_AGP(command
, 1);
424 pci_write_config(dev
, agp_find_caps(dev
) + AGP_COMMAND
, command
, 4);
425 pci_write_config(mdev
, agp_find_caps(mdev
) + AGP_COMMAND
, command
, 4);
431 agp_generic_enable(device_t dev
, u_int32_t mode
)
433 device_t mdev
= agp_find_display();
434 u_int32_t tstatus
, mstatus
;
437 AGP_DPF("can't find display\n");
441 tstatus
= pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
442 mstatus
= pci_read_config(mdev
, agp_find_caps(mdev
) + AGP_STATUS
, 4);
445 * Check display and bridge for AGP v3 support. AGP v3 allows
446 * more variety in topology than v2, e.g. multiple AGP devices
447 * attached to one bridge, or multiple AGP bridges in one
448 * system. This doesn't attempt to address those situations,
449 * but should work fine for a classic single AGP slot system
452 if (AGP_MODE_GET_MODE_3(mode
) &&
453 AGP_MODE_GET_MODE_3(tstatus
) &&
454 AGP_MODE_GET_MODE_3(mstatus
))
455 return (agp_v3_enable(dev
, mdev
, mode
));
457 return (agp_v2_enable(dev
, mdev
, mode
));
461 agp_generic_alloc_memory(device_t dev
, int type
, vm_size_t size
)
463 struct agp_softc
*sc
= device_get_softc(dev
);
464 struct agp_memory
*mem
;
466 if ((size
& (AGP_PAGE_SIZE
- 1)) != 0)
469 if (sc
->as_allocated
+ size
> sc
->as_maxmem
)
473 kprintf("agp_generic_alloc_memory: unsupported type %d\n",
478 mem
= kmalloc(sizeof *mem
, M_AGP
, M_INTWAIT
);
479 mem
->am_id
= sc
->as_nextid
++;
482 mem
->am_obj
= vm_object_allocate(OBJT_DEFAULT
, atop(round_page(size
)));
483 mem
->am_physical
= 0;
485 mem
->am_is_bound
= 0;
486 TAILQ_INSERT_TAIL(&sc
->as_memory
, mem
, am_link
);
487 sc
->as_allocated
+= size
;
493 agp_generic_free_memory(device_t dev
, struct agp_memory
*mem
)
495 struct agp_softc
*sc
= device_get_softc(dev
);
497 if (mem
->am_is_bound
)
500 sc
->as_allocated
-= mem
->am_size
;
501 TAILQ_REMOVE(&sc
->as_memory
, mem
, am_link
);
502 vm_object_deallocate(mem
->am_obj
);
508 agp_generic_bind_memory(device_t dev
, struct agp_memory
*mem
,
511 struct agp_softc
*sc
= device_get_softc(dev
);
516 lockmgr(&sc
->as_lock
, LK_EXCLUSIVE
);
518 if (mem
->am_is_bound
) {
519 device_printf(dev
, "memory already bound\n");
520 lockmgr(&sc
->as_lock
, LK_RELEASE
);
525 || (offset
& (AGP_PAGE_SIZE
- 1)) != 0
526 || offset
+ mem
->am_size
> AGP_GET_APERTURE(dev
)) {
527 device_printf(dev
, "binding memory at bad offset %#x,%#x,%#x\n",
528 (int) offset
, (int)mem
->am_size
,
529 (int)AGP_GET_APERTURE(dev
));
530 kprintf("Check BIOS's aperature size vs X\n");
531 lockmgr(&sc
->as_lock
, LK_RELEASE
);
536 * Bind the individual pages and flush the chipset's
539 for (i
= 0; i
< mem
->am_size
; i
+= PAGE_SIZE
) {
541 * Find a page from the object and wire it
542 * down. This page will be mapped using one or more
543 * entries in the GATT (assuming that PAGE_SIZE >=
544 * AGP_PAGE_SIZE. If this is the first call to bind,
545 * the pages will be allocated and zeroed.
547 m
= vm_page_grab(mem
->am_obj
, OFF_TO_IDX(i
),
548 VM_ALLOC_NORMAL
| VM_ALLOC_ZERO
| VM_ALLOC_RETRY
);
549 if ((m
->flags
& PG_ZERO
) == 0)
550 vm_page_zero_fill(m
);
551 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m
));
555 * Install entries in the GATT, making sure that if
556 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
557 * aligned to PAGE_SIZE, we don't modify too many GATT
560 for (j
= 0; j
< PAGE_SIZE
&& i
+ j
< mem
->am_size
;
561 j
+= AGP_PAGE_SIZE
) {
562 vm_offset_t pa
= VM_PAGE_TO_PHYS(m
) + j
;
563 AGP_DPF("binding offset %#x to pa %#x\n",
565 error
= AGP_BIND_PAGE(dev
, offset
+ i
+ j
, pa
);
568 * Bail out. Reverse all the mappings
569 * and unwire the pages.
572 for (k
= 0; k
< i
+ j
; k
+= AGP_PAGE_SIZE
)
573 AGP_UNBIND_PAGE(dev
, offset
+ k
);
574 for (k
= 0; k
<= i
; k
+= PAGE_SIZE
) {
575 m
= vm_page_lookup(mem
->am_obj
,
577 vm_page_unwire(m
, 0);
579 lockmgr(&sc
->as_lock
, LK_RELEASE
);
587 * Flush the cpu cache since we are providing a new mapping
593 * Make sure the chipset gets the new mappings.
597 mem
->am_offset
= offset
;
598 mem
->am_is_bound
= 1;
600 lockmgr(&sc
->as_lock
, LK_RELEASE
);
606 agp_generic_unbind_memory(device_t dev
, struct agp_memory
*mem
)
608 struct agp_softc
*sc
= device_get_softc(dev
);
612 lockmgr(&sc
->as_lock
, LK_EXCLUSIVE
);
614 if (!mem
->am_is_bound
) {
615 device_printf(dev
, "memory is not bound\n");
616 lockmgr(&sc
->as_lock
, LK_RELEASE
);
622 * Unbind the individual pages and flush the chipset's
623 * TLB. Unwire the pages so they can be swapped.
625 for (i
= 0; i
< mem
->am_size
; i
+= AGP_PAGE_SIZE
)
626 AGP_UNBIND_PAGE(dev
, mem
->am_offset
+ i
);
627 for (i
= 0; i
< mem
->am_size
; i
+= PAGE_SIZE
) {
628 m
= vm_page_lookup(mem
->am_obj
, atop(i
));
629 vm_page_unwire(m
, 0);
636 mem
->am_is_bound
= 0;
638 lockmgr(&sc
->as_lock
, LK_RELEASE
);
643 /* Helper functions for implementing user/kernel api */
646 agp_acquire_helper(device_t dev
, enum agp_acquire_state state
)
648 struct agp_softc
*sc
= device_get_softc(dev
);
650 if (sc
->as_state
!= AGP_ACQUIRE_FREE
)
652 sc
->as_state
= state
;
658 agp_release_helper(device_t dev
, enum agp_acquire_state state
)
660 struct agp_softc
*sc
= device_get_softc(dev
);
662 if (sc
->as_state
== AGP_ACQUIRE_FREE
)
665 if (sc
->as_state
!= state
)
668 sc
->as_state
= AGP_ACQUIRE_FREE
;
672 static struct agp_memory
*
673 agp_find_memory(device_t dev
, int id
)
675 struct agp_softc
*sc
= device_get_softc(dev
);
676 struct agp_memory
*mem
;
678 AGP_DPF("searching for memory block %d\n", id
);
679 TAILQ_FOREACH(mem
, &sc
->as_memory
, am_link
) {
680 AGP_DPF("considering memory block %d\n", mem
->am_id
);
681 if (mem
->am_id
== id
)
687 /* Implementation of the userland ioctl api */
690 agp_info_user(device_t dev
, agp_info
*info
)
692 struct agp_softc
*sc
= device_get_softc(dev
);
694 bzero(info
, sizeof *info
);
695 info
->bridge_id
= pci_get_devid(dev
);
697 pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
698 info
->aper_base
= rman_get_start(sc
->as_aperture
);
699 info
->aper_size
= AGP_GET_APERTURE(dev
) >> 20;
700 info
->pg_total
= info
->pg_system
= sc
->as_maxmem
>> AGP_PAGE_SHIFT
;
701 info
->pg_used
= sc
->as_allocated
>> AGP_PAGE_SHIFT
;
707 agp_setup_user(device_t dev
, agp_setup
*setup
)
709 return AGP_ENABLE(dev
, setup
->agp_mode
);
713 agp_allocate_user(device_t dev
, agp_allocate
*alloc
)
715 struct agp_memory
*mem
;
717 mem
= AGP_ALLOC_MEMORY(dev
,
719 alloc
->pg_count
<< AGP_PAGE_SHIFT
);
721 alloc
->key
= mem
->am_id
;
722 alloc
->physical
= mem
->am_physical
;
730 agp_deallocate_user(device_t dev
, int id
)
732 struct agp_memory
*mem
= agp_find_memory(dev
, id
);
735 AGP_FREE_MEMORY(dev
, mem
);
743 agp_bind_user(device_t dev
, agp_bind
*bind
)
745 struct agp_memory
*mem
= agp_find_memory(dev
, bind
->key
);
750 return AGP_BIND_MEMORY(dev
, mem
, bind
->pg_start
<< AGP_PAGE_SHIFT
);
754 agp_unbind_user(device_t dev
, agp_unbind
*unbind
)
756 struct agp_memory
*mem
= agp_find_memory(dev
, unbind
->key
);
761 return AGP_UNBIND_MEMORY(dev
, mem
);
765 agp_open(struct dev_open_args
*ap
)
767 cdev_t kdev
= ap
->a_head
.a_dev
;
768 device_t dev
= KDEV2DEV(kdev
);
769 struct agp_softc
*sc
= device_get_softc(dev
);
771 if (!sc
->as_isopen
) {
780 agp_close(struct dev_close_args
*ap
)
782 cdev_t kdev
= ap
->a_head
.a_dev
;
783 device_t dev
= KDEV2DEV(kdev
);
784 struct agp_softc
*sc
= device_get_softc(dev
);
785 struct agp_memory
*mem
;
788 * Clear the GATT and force release on last close
790 while ((mem
= TAILQ_FIRST(&sc
->as_memory
)) != 0) {
791 if (mem
->am_is_bound
)
792 AGP_UNBIND_MEMORY(dev
, mem
);
793 AGP_FREE_MEMORY(dev
, mem
);
795 if (sc
->as_state
== AGP_ACQUIRE_USER
)
796 agp_release_helper(dev
, AGP_ACQUIRE_USER
);
804 agp_ioctl(struct dev_ioctl_args
*ap
)
806 cdev_t kdev
= ap
->a_head
.a_dev
;
807 device_t dev
= KDEV2DEV(kdev
);
811 return agp_info_user(dev
, (agp_info
*)ap
->a_data
);
814 return agp_acquire_helper(dev
, AGP_ACQUIRE_USER
);
817 return agp_release_helper(dev
, AGP_ACQUIRE_USER
);
820 return agp_setup_user(dev
, (agp_setup
*)ap
->a_data
);
822 case AGPIOC_ALLOCATE
:
823 return agp_allocate_user(dev
, (agp_allocate
*)ap
->a_data
);
825 case AGPIOC_DEALLOCATE
:
826 return agp_deallocate_user(dev
, *(int *)ap
->a_data
);
829 return agp_bind_user(dev
, (agp_bind
*)ap
->a_data
);
832 return agp_unbind_user(dev
, (agp_unbind
*)ap
->a_data
);
840 agp_mmap(struct dev_mmap_args
*ap
)
842 cdev_t kdev
= ap
->a_head
.a_dev
;
843 device_t dev
= KDEV2DEV(kdev
);
844 struct agp_softc
*sc
= device_get_softc(dev
);
846 if (ap
->a_offset
> AGP_GET_APERTURE(dev
))
848 ap
->a_result
= atop(rman_get_start(sc
->as_aperture
) + ap
->a_offset
);
852 /* Implementation of the kernel api */
855 agp_find_device(void)
857 device_t
*children
, child
;
862 if (devclass_get_devices(agp_devclass
, &children
, &count
) != 0)
865 for (i
= 0; i
< count
; i
++) {
866 if (device_is_attached(children
[i
])) {
871 kfree(children
, M_TEMP
);
875 enum agp_acquire_state
876 agp_state(device_t dev
)
878 struct agp_softc
*sc
= device_get_softc(dev
);
883 agp_get_info(device_t dev
, struct agp_info
*info
)
885 struct agp_softc
*sc
= device_get_softc(dev
);
888 pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
889 info
->ai_aperture_base
= rman_get_start(sc
->as_aperture
);
890 info
->ai_aperture_size
= rman_get_size(sc
->as_aperture
);
891 info
->ai_memory_allowed
= sc
->as_maxmem
;
892 info
->ai_memory_used
= sc
->as_allocated
;
896 agp_acquire(device_t dev
)
898 return agp_acquire_helper(dev
, AGP_ACQUIRE_KERNEL
);
902 agp_release(device_t dev
)
904 return agp_release_helper(dev
, AGP_ACQUIRE_KERNEL
);
908 agp_enable(device_t dev
, u_int32_t mode
)
910 return AGP_ENABLE(dev
, mode
);
913 void *agp_alloc_memory(device_t dev
, int type
, vm_size_t bytes
)
915 return (void *) AGP_ALLOC_MEMORY(dev
, type
, bytes
);
918 void agp_free_memory(device_t dev
, void *handle
)
920 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
921 AGP_FREE_MEMORY(dev
, mem
);
924 int agp_bind_memory(device_t dev
, void *handle
, vm_offset_t offset
)
926 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
927 return AGP_BIND_MEMORY(dev
, mem
, offset
);
930 int agp_unbind_memory(device_t dev
, void *handle
)
932 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
933 return AGP_UNBIND_MEMORY(dev
, mem
);
936 void agp_memory_info(device_t dev
, void *handle
, struct
939 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
941 mi
->ami_size
= mem
->am_size
;
942 mi
->ami_physical
= mem
->am_physical
;
943 mi
->ami_offset
= mem
->am_offset
;
944 mi
->ami_is_bound
= mem
->am_is_bound
;