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/ioccom.h>
41 #include <sys/agpio.h>
46 #include <bus/pci/pcivar.h>
47 #include <bus/pci/pcireg.h>
53 #include <vm/vm_object.h>
54 #include <vm/vm_page.h>
55 #include <vm/vm_pageout.h>
58 #include <machine/md_var.h>
60 MODULE_VERSION(agp
, 1);
62 MALLOC_DEFINE(M_AGP
, "agp", "AGP data structures");
64 #define CDEV_MAJOR 148
66 static d_open_t agp_open
;
67 static d_close_t agp_close
;
68 static d_ioctl_t agp_ioctl
;
69 static d_mmap_t agp_mmap
;
71 static struct dev_ops agp_ops
= {
72 { "agp", CDEV_MAJOR
, D_TTY
},
79 static devclass_t agp_devclass
;
80 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
82 /* Helper functions for implementing chipset mini drivers. */
87 #if defined(__i386__) || defined(__amd64__)
93 agp_find_caps(device_t dev
)
99 * Check the CAP_LIST bit of the PCI status register first.
101 status
= pci_read_config(dev
, PCIR_STATUS
, 2);
102 if (!(status
& 0x10))
106 * Traverse the capabilities list.
108 for (ptr
= pci_read_config(dev
, AGP_CAPPTR
, 1);
111 u_int32_t capid
= pci_read_config(dev
, ptr
, 4);
112 next
= AGP_CAPID_GET_NEXT_PTR(capid
);
115 * If this capability entry ID is 2, then we are done.
117 if (AGP_CAPID_GET_CAP_ID(capid
) == 2)
125 * Find an AGP display device (if any).
128 agp_find_display(void)
130 devclass_t pci
= devclass_find("pci");
131 device_t bus
, dev
= 0;
133 int busnum
, numkids
, i
;
135 for (busnum
= 0; busnum
< devclass_get_maxunit(pci
); busnum
++) {
136 bus
= devclass_get_device(pci
, busnum
);
139 device_get_children(bus
, &kids
, &numkids
);
140 for (i
= 0; i
< numkids
; i
++) {
142 if (pci_get_class(dev
) == PCIC_DISPLAY
143 && pci_get_subclass(dev
) == PCIS_DISPLAY_VGA
)
144 if (agp_find_caps(dev
)) {
157 agp_alloc_gatt(device_t dev
)
159 u_int32_t apsize
= AGP_GET_APERTURE(dev
);
160 u_int32_t entries
= apsize
>> AGP_PAGE_SHIFT
;
161 struct agp_gatt
*gatt
;
165 "allocating GATT for aperture of size %dM\n",
166 apsize
/ (1024*1024));
169 device_printf(dev
, "bad aperture size\n");
173 gatt
= kmalloc(sizeof(struct agp_gatt
), M_AGP
, M_INTWAIT
);
174 gatt
->ag_entries
= entries
;
175 gatt
->ag_virtual
= contigmalloc(entries
* sizeof(u_int32_t
), M_AGP
,
176 M_WAITOK
|M_ZERO
, 0, ~0, PAGE_SIZE
, 0);
177 if (!gatt
->ag_virtual
) {
179 device_printf(dev
, "contiguous allocation failed\n");
183 gatt
->ag_physical
= vtophys((vm_offset_t
) gatt
->ag_virtual
);
190 agp_free_gatt(struct agp_gatt
*gatt
)
192 contigfree(gatt
->ag_virtual
,
193 gatt
->ag_entries
* sizeof(u_int32_t
), M_AGP
);
197 static u_int agp_max
[][2] = {
208 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
211 * Sets the PCI resource which represents the AGP aperture.
213 * If not called, the default AGP aperture resource of AGP_APBASE will
214 * be used. Must be called before agp_generic_attach().
217 agp_set_aperture_resource(device_t dev
, int rid
)
219 struct agp_softc
*sc
= device_get_softc(dev
);
221 sc
->as_aperture_rid
= rid
;
225 agp_generic_attach(device_t dev
)
227 struct agp_softc
*sc
= device_get_softc(dev
);
232 * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
233 * because the kernel doesn't need to map it.
235 if (sc
->as_aperture_rid
== 0)
236 sc
->as_aperture_rid
= AGP_APBASE
;
238 sc
->as_aperture
= bus_alloc_resource_any(dev
, SYS_RES_MEMORY
,
239 &sc
->as_aperture_rid
, RF_SHAREABLE
);
240 if (!sc
->as_aperture
)
244 * Work out an upper bound for agp memory allocation. This
245 * uses a heurisitc table from the Linux driver.
247 memsize
= ptoa(Maxmem
) >> 20;
248 for (i
= 0; i
< agp_max_size
; i
++) {
249 if (memsize
<= agp_max
[i
][0])
252 if (i
== agp_max_size
) i
= agp_max_size
- 1;
253 sc
->as_maxmem
= agp_max
[i
][1] << 20U;
256 * The lock is used to prevent re-entry to
257 * agp_generic_bind_memory() since that function can sleep.
259 lockinit(&sc
->as_lock
, "agplk", 0, 0);
262 * Initialise stuff for the userland device.
264 agp_devclass
= devclass_find("agp");
265 TAILQ_INIT(&sc
->as_memory
);
268 dev_ops_add(&agp_ops
, -1, device_get_unit(dev
));
269 make_dev(&agp_ops
, device_get_unit(dev
), UID_ROOT
, GID_WHEEL
,
276 agp_free_cdev(device_t dev
)
278 dev_ops_remove(&agp_ops
, -1, device_get_unit(dev
));
282 agp_free_res(device_t dev
)
284 struct agp_softc
*sc
= device_get_softc(dev
);
286 bus_release_resource(dev
, SYS_RES_MEMORY
, sc
->as_aperture_rid
,
292 agp_generic_detach(device_t dev
)
300 * Default AGP aperture size detection which simply returns the size of
301 * the aperture's PCI resource.
304 agp_generic_get_aperture(device_t dev
)
306 struct agp_softc
*sc
= device_get_softc(dev
);
308 return rman_get_size(sc
->as_aperture
);
312 * Default AGP aperture size setting function, which simply doesn't allow
313 * changes to resource size.
316 agp_generic_set_aperture(device_t dev
, u_int32_t aperture
)
318 u_int32_t current_aperture
;
320 current_aperture
= AGP_GET_APERTURE(dev
);
321 if (current_aperture
!= aperture
)
328 * This does the enable logic for v3, with the same topology
329 * restrictions as in place for v2 -- one bus, one device on the bus.
332 agp_v3_enable(device_t dev
, device_t mdev
, u_int32_t mode
)
334 u_int32_t tstatus
, mstatus
;
336 int rq
, sba
, fw
, rate
, arqsz
, cal
;
338 tstatus
= pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
339 mstatus
= pci_read_config(mdev
, agp_find_caps(mdev
) + AGP_STATUS
, 4);
341 /* Set RQ to the min of mode, tstatus and mstatus */
342 rq
= AGP_MODE_GET_RQ(mode
);
343 if (AGP_MODE_GET_RQ(tstatus
) < rq
)
344 rq
= AGP_MODE_GET_RQ(tstatus
);
345 if (AGP_MODE_GET_RQ(mstatus
) < rq
)
346 rq
= AGP_MODE_GET_RQ(mstatus
);
349 * ARQSZ - Set the value to the maximum one.
350 * Don't allow the mode register to override values.
352 arqsz
= AGP_MODE_GET_ARQSZ(mode
);
353 if (AGP_MODE_GET_ARQSZ(tstatus
) > rq
)
354 rq
= AGP_MODE_GET_ARQSZ(tstatus
);
355 if (AGP_MODE_GET_ARQSZ(mstatus
) > rq
)
356 rq
= AGP_MODE_GET_ARQSZ(mstatus
);
358 /* Calibration cycle - don't allow override by mode register */
359 cal
= AGP_MODE_GET_CAL(tstatus
);
360 if (AGP_MODE_GET_CAL(mstatus
) < cal
)
361 cal
= AGP_MODE_GET_CAL(mstatus
);
363 /* SBA must be supported for AGP v3. */
366 /* Set FW if all three support it. */
367 fw
= (AGP_MODE_GET_FW(tstatus
)
368 & AGP_MODE_GET_FW(mstatus
)
369 & AGP_MODE_GET_FW(mode
));
371 /* Figure out the max rate */
372 rate
= (AGP_MODE_GET_RATE(tstatus
)
373 & AGP_MODE_GET_RATE(mstatus
)
374 & AGP_MODE_GET_RATE(mode
));
375 if (rate
& AGP_MODE_V3_RATE_8x
)
376 rate
= AGP_MODE_V3_RATE_8x
;
378 rate
= AGP_MODE_V3_RATE_4x
;
380 device_printf(dev
, "Setting AGP v3 mode %d\n", rate
* 4);
382 pci_write_config(dev
, agp_find_caps(dev
) + AGP_COMMAND
, 0, 4);
384 /* Construct the new mode word and tell the hardware */
386 command
= AGP_MODE_SET_RQ(0, rq
);
387 command
= AGP_MODE_SET_ARQSZ(command
, arqsz
);
388 command
= AGP_MODE_SET_CAL(command
, cal
);
389 command
= AGP_MODE_SET_SBA(command
, sba
);
390 command
= AGP_MODE_SET_FW(command
, fw
);
391 command
= AGP_MODE_SET_RATE(command
, rate
);
392 command
= AGP_MODE_SET_MODE_3(command
, 1);
393 command
= AGP_MODE_SET_AGP(command
, 1);
394 pci_write_config(dev
, agp_find_caps(dev
) + AGP_COMMAND
, command
, 4);
395 pci_write_config(mdev
, agp_find_caps(mdev
) + AGP_COMMAND
, command
, 4);
401 agp_v2_enable(device_t dev
, device_t mdev
, u_int32_t mode
)
403 u_int32_t tstatus
, mstatus
;
405 int rq
, sba
, fw
, rate
;
407 tstatus
= pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
408 mstatus
= pci_read_config(mdev
, agp_find_caps(mdev
) + AGP_STATUS
, 4);
410 /* Set RQ to the min of mode, tstatus and mstatus */
411 rq
= AGP_MODE_GET_RQ(mode
);
412 if (AGP_MODE_GET_RQ(tstatus
) < rq
)
413 rq
= AGP_MODE_GET_RQ(tstatus
);
414 if (AGP_MODE_GET_RQ(mstatus
) < rq
)
415 rq
= AGP_MODE_GET_RQ(mstatus
);
417 /* Set SBA if all three can deal with SBA */
418 sba
= (AGP_MODE_GET_SBA(tstatus
)
419 & AGP_MODE_GET_SBA(mstatus
)
420 & AGP_MODE_GET_SBA(mode
));
423 fw
= (AGP_MODE_GET_FW(tstatus
)
424 & AGP_MODE_GET_FW(mstatus
)
425 & AGP_MODE_GET_FW(mode
));
427 /* Figure out the max rate */
428 rate
= (AGP_MODE_GET_RATE(tstatus
)
429 & AGP_MODE_GET_RATE(mstatus
)
430 & AGP_MODE_GET_RATE(mode
));
431 if (rate
& AGP_MODE_V2_RATE_4x
)
432 rate
= AGP_MODE_V2_RATE_4x
;
433 else if (rate
& AGP_MODE_V2_RATE_2x
)
434 rate
= AGP_MODE_V2_RATE_2x
;
436 rate
= AGP_MODE_V2_RATE_1x
;
438 device_printf(dev
, "Setting AGP v2 mode %d\n", rate
);
440 /* Construct the new mode word and tell the hardware */
442 command
= AGP_MODE_SET_RQ(0, rq
);
443 command
= AGP_MODE_SET_SBA(command
, sba
);
444 command
= AGP_MODE_SET_FW(command
, fw
);
445 command
= AGP_MODE_SET_RATE(command
, rate
);
446 command
= AGP_MODE_SET_AGP(command
, 1);
447 pci_write_config(dev
, agp_find_caps(dev
) + AGP_COMMAND
, command
, 4);
448 pci_write_config(mdev
, agp_find_caps(mdev
) + AGP_COMMAND
, command
, 4);
454 agp_generic_enable(device_t dev
, u_int32_t mode
)
456 device_t mdev
= agp_find_display();
457 u_int32_t tstatus
, mstatus
;
460 AGP_DPF("can't find display\n");
464 tstatus
= pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
465 mstatus
= pci_read_config(mdev
, agp_find_caps(mdev
) + AGP_STATUS
, 4);
468 * Check display and bridge for AGP v3 support. AGP v3 allows
469 * more variety in topology than v2, e.g. multiple AGP devices
470 * attached to one bridge, or multiple AGP bridges in one
471 * system. This doesn't attempt to address those situations,
472 * but should work fine for a classic single AGP slot system
475 if (AGP_MODE_GET_MODE_3(mode
) &&
476 AGP_MODE_GET_MODE_3(tstatus
) &&
477 AGP_MODE_GET_MODE_3(mstatus
))
478 return (agp_v3_enable(dev
, mdev
, mode
));
480 return (agp_v2_enable(dev
, mdev
, mode
));
484 agp_generic_alloc_memory(device_t dev
, int type
, vm_size_t size
)
486 struct agp_softc
*sc
= device_get_softc(dev
);
487 struct agp_memory
*mem
;
489 if ((size
& (AGP_PAGE_SIZE
- 1)) != 0)
492 if (sc
->as_allocated
+ size
> sc
->as_maxmem
)
496 kprintf("agp_generic_alloc_memory: unsupported type %d\n",
501 mem
= kmalloc(sizeof *mem
, M_AGP
, M_INTWAIT
);
502 mem
->am_id
= sc
->as_nextid
++;
505 mem
->am_obj
= vm_object_allocate(OBJT_DEFAULT
, atop(round_page(size
)));
506 mem
->am_physical
= 0;
508 mem
->am_is_bound
= 0;
509 TAILQ_INSERT_TAIL(&sc
->as_memory
, mem
, am_link
);
510 sc
->as_allocated
+= size
;
516 agp_generic_free_memory(device_t dev
, struct agp_memory
*mem
)
518 struct agp_softc
*sc
= device_get_softc(dev
);
520 if (mem
->am_is_bound
)
523 sc
->as_allocated
-= mem
->am_size
;
524 TAILQ_REMOVE(&sc
->as_memory
, mem
, am_link
);
525 vm_object_deallocate(mem
->am_obj
);
531 agp_generic_bind_memory(device_t dev
, struct agp_memory
*mem
,
534 struct agp_softc
*sc
= device_get_softc(dev
);
539 lockmgr(&sc
->as_lock
, LK_EXCLUSIVE
);
541 if (mem
->am_is_bound
) {
542 device_printf(dev
, "memory already bound\n");
543 lockmgr(&sc
->as_lock
, LK_RELEASE
);
548 || (offset
& (AGP_PAGE_SIZE
- 1)) != 0
549 || offset
+ mem
->am_size
> AGP_GET_APERTURE(dev
)) {
550 device_printf(dev
, "binding memory at bad offset %#x,%#x,%#x\n",
551 (int) offset
, (int)mem
->am_size
,
552 (int)AGP_GET_APERTURE(dev
));
553 kprintf("Check BIOS's aperature size vs X\n");
554 lockmgr(&sc
->as_lock
, LK_RELEASE
);
559 * Bind the individual pages and flush the chipset's
562 for (i
= 0; i
< mem
->am_size
; i
+= PAGE_SIZE
) {
564 * Find a page from the object and wire it
565 * down. This page will be mapped using one or more
566 * entries in the GATT (assuming that PAGE_SIZE >=
567 * AGP_PAGE_SIZE. If this is the first call to bind,
568 * the pages will be allocated and zeroed.
570 m
= vm_page_grab(mem
->am_obj
, OFF_TO_IDX(i
),
571 VM_ALLOC_NORMAL
| VM_ALLOC_ZERO
| VM_ALLOC_RETRY
);
572 if ((m
->flags
& PG_ZERO
) == 0)
573 vm_page_zero_fill(m
);
574 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m
));
578 * Install entries in the GATT, making sure that if
579 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
580 * aligned to PAGE_SIZE, we don't modify too many GATT
583 for (j
= 0; j
< PAGE_SIZE
&& i
+ j
< mem
->am_size
;
584 j
+= AGP_PAGE_SIZE
) {
585 vm_offset_t pa
= VM_PAGE_TO_PHYS(m
) + j
;
586 AGP_DPF("binding offset %#x to pa %#x\n",
588 error
= AGP_BIND_PAGE(dev
, offset
+ i
+ j
, pa
);
591 * Bail out. Reverse all the mappings
592 * and unwire the pages.
595 for (k
= 0; k
< i
+ j
; k
+= AGP_PAGE_SIZE
)
596 AGP_UNBIND_PAGE(dev
, offset
+ k
);
597 for (k
= 0; k
<= i
; k
+= PAGE_SIZE
) {
598 m
= vm_page_lookup(mem
->am_obj
,
600 vm_page_unwire(m
, 0);
602 lockmgr(&sc
->as_lock
, LK_RELEASE
);
610 * Flush the cpu cache since we are providing a new mapping
616 * Make sure the chipset gets the new mappings.
620 mem
->am_offset
= offset
;
621 mem
->am_is_bound
= 1;
623 lockmgr(&sc
->as_lock
, LK_RELEASE
);
629 agp_generic_unbind_memory(device_t dev
, struct agp_memory
*mem
)
631 struct agp_softc
*sc
= device_get_softc(dev
);
635 lockmgr(&sc
->as_lock
, LK_EXCLUSIVE
);
637 if (!mem
->am_is_bound
) {
638 device_printf(dev
, "memory is not bound\n");
639 lockmgr(&sc
->as_lock
, LK_RELEASE
);
645 * Unbind the individual pages and flush the chipset's
646 * TLB. Unwire the pages so they can be swapped.
648 for (i
= 0; i
< mem
->am_size
; i
+= AGP_PAGE_SIZE
)
649 AGP_UNBIND_PAGE(dev
, mem
->am_offset
+ i
);
650 for (i
= 0; i
< mem
->am_size
; i
+= PAGE_SIZE
) {
651 m
= vm_page_lookup(mem
->am_obj
, atop(i
));
652 vm_page_unwire(m
, 0);
659 mem
->am_is_bound
= 0;
661 lockmgr(&sc
->as_lock
, LK_RELEASE
);
666 /* Helper functions for implementing user/kernel api */
669 agp_acquire_helper(device_t dev
, enum agp_acquire_state state
)
671 struct agp_softc
*sc
= device_get_softc(dev
);
673 if (sc
->as_state
!= AGP_ACQUIRE_FREE
)
675 sc
->as_state
= state
;
681 agp_release_helper(device_t dev
, enum agp_acquire_state state
)
683 struct agp_softc
*sc
= device_get_softc(dev
);
685 if (sc
->as_state
== AGP_ACQUIRE_FREE
)
688 if (sc
->as_state
!= state
)
691 sc
->as_state
= AGP_ACQUIRE_FREE
;
695 static struct agp_memory
*
696 agp_find_memory(device_t dev
, int id
)
698 struct agp_softc
*sc
= device_get_softc(dev
);
699 struct agp_memory
*mem
;
701 AGP_DPF("searching for memory block %d\n", id
);
702 TAILQ_FOREACH(mem
, &sc
->as_memory
, am_link
) {
703 AGP_DPF("considering memory block %d\n", mem
->am_id
);
704 if (mem
->am_id
== id
)
710 /* Implementation of the userland ioctl api */
713 agp_info_user(device_t dev
, agp_info
*info
)
715 struct agp_softc
*sc
= device_get_softc(dev
);
717 bzero(info
, sizeof *info
);
718 info
->bridge_id
= pci_get_devid(dev
);
720 pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
721 info
->aper_base
= rman_get_start(sc
->as_aperture
);
722 info
->aper_size
= AGP_GET_APERTURE(dev
) >> 20;
723 info
->pg_total
= info
->pg_system
= sc
->as_maxmem
>> AGP_PAGE_SHIFT
;
724 info
->pg_used
= sc
->as_allocated
>> AGP_PAGE_SHIFT
;
730 agp_setup_user(device_t dev
, agp_setup
*setup
)
732 return AGP_ENABLE(dev
, setup
->agp_mode
);
736 agp_allocate_user(device_t dev
, agp_allocate
*alloc
)
738 struct agp_memory
*mem
;
740 mem
= AGP_ALLOC_MEMORY(dev
,
742 alloc
->pg_count
<< AGP_PAGE_SHIFT
);
744 alloc
->key
= mem
->am_id
;
745 alloc
->physical
= mem
->am_physical
;
753 agp_deallocate_user(device_t dev
, int id
)
755 struct agp_memory
*mem
= agp_find_memory(dev
, id
);
758 AGP_FREE_MEMORY(dev
, mem
);
766 agp_bind_user(device_t dev
, agp_bind
*bind
)
768 struct agp_memory
*mem
= agp_find_memory(dev
, bind
->key
);
773 return AGP_BIND_MEMORY(dev
, mem
, bind
->pg_start
<< AGP_PAGE_SHIFT
);
777 agp_unbind_user(device_t dev
, agp_unbind
*unbind
)
779 struct agp_memory
*mem
= agp_find_memory(dev
, unbind
->key
);
784 return AGP_UNBIND_MEMORY(dev
, mem
);
788 agp_open(struct dev_open_args
*ap
)
790 cdev_t kdev
= ap
->a_head
.a_dev
;
791 device_t dev
= KDEV2DEV(kdev
);
792 struct agp_softc
*sc
= device_get_softc(dev
);
794 if (!sc
->as_isopen
) {
803 agp_close(struct dev_close_args
*ap
)
805 cdev_t kdev
= ap
->a_head
.a_dev
;
806 device_t dev
= KDEV2DEV(kdev
);
807 struct agp_softc
*sc
= device_get_softc(dev
);
808 struct agp_memory
*mem
;
811 * Clear the GATT and force release on last close
813 while ((mem
= TAILQ_FIRST(&sc
->as_memory
)) != 0) {
814 if (mem
->am_is_bound
)
815 AGP_UNBIND_MEMORY(dev
, mem
);
816 AGP_FREE_MEMORY(dev
, mem
);
818 if (sc
->as_state
== AGP_ACQUIRE_USER
)
819 agp_release_helper(dev
, AGP_ACQUIRE_USER
);
827 agp_ioctl(struct dev_ioctl_args
*ap
)
829 cdev_t kdev
= ap
->a_head
.a_dev
;
830 device_t dev
= KDEV2DEV(kdev
);
834 return agp_info_user(dev
, (agp_info
*)ap
->a_data
);
837 return agp_acquire_helper(dev
, AGP_ACQUIRE_USER
);
840 return agp_release_helper(dev
, AGP_ACQUIRE_USER
);
843 return agp_setup_user(dev
, (agp_setup
*)ap
->a_data
);
845 case AGPIOC_ALLOCATE
:
846 return agp_allocate_user(dev
, (agp_allocate
*)ap
->a_data
);
848 case AGPIOC_DEALLOCATE
:
849 return agp_deallocate_user(dev
, *(int *)ap
->a_data
);
852 return agp_bind_user(dev
, (agp_bind
*)ap
->a_data
);
855 return agp_unbind_user(dev
, (agp_unbind
*)ap
->a_data
);
863 agp_mmap(struct dev_mmap_args
*ap
)
865 cdev_t kdev
= ap
->a_head
.a_dev
;
866 device_t dev
= KDEV2DEV(kdev
);
867 struct agp_softc
*sc
= device_get_softc(dev
);
869 if (ap
->a_offset
> AGP_GET_APERTURE(dev
))
871 ap
->a_result
= atop(rman_get_start(sc
->as_aperture
) + ap
->a_offset
);
875 /* Implementation of the kernel api */
878 agp_find_device(void)
880 device_t
*children
, child
;
885 if (devclass_get_devices(agp_devclass
, &children
, &count
) != 0)
888 for (i
= 0; i
< count
; i
++) {
889 if (device_is_attached(children
[i
])) {
894 kfree(children
, M_TEMP
);
898 enum agp_acquire_state
899 agp_state(device_t dev
)
901 struct agp_softc
*sc
= device_get_softc(dev
);
906 agp_get_info(device_t dev
, struct agp_info
*info
)
908 struct agp_softc
*sc
= device_get_softc(dev
);
911 pci_read_config(dev
, agp_find_caps(dev
) + AGP_STATUS
, 4);
912 info
->ai_aperture_base
= rman_get_start(sc
->as_aperture
);
913 info
->ai_aperture_size
= rman_get_size(sc
->as_aperture
);
914 info
->ai_memory_allowed
= sc
->as_maxmem
;
915 info
->ai_memory_used
= sc
->as_allocated
;
919 agp_acquire(device_t dev
)
921 return agp_acquire_helper(dev
, AGP_ACQUIRE_KERNEL
);
925 agp_release(device_t dev
)
927 return agp_release_helper(dev
, AGP_ACQUIRE_KERNEL
);
931 agp_enable(device_t dev
, u_int32_t mode
)
933 return AGP_ENABLE(dev
, mode
);
936 void *agp_alloc_memory(device_t dev
, int type
, vm_size_t bytes
)
938 return (void *) AGP_ALLOC_MEMORY(dev
, type
, bytes
);
941 void agp_free_memory(device_t dev
, void *handle
)
943 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
944 AGP_FREE_MEMORY(dev
, mem
);
947 int agp_bind_memory(device_t dev
, void *handle
, vm_offset_t offset
)
949 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
950 return AGP_BIND_MEMORY(dev
, mem
, offset
);
953 int agp_unbind_memory(device_t dev
, void *handle
)
955 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
956 return AGP_UNBIND_MEMORY(dev
, mem
);
959 void agp_memory_info(device_t dev
, void *handle
, struct
962 struct agp_memory
*mem
= (struct agp_memory
*) handle
;
964 mi
->ami_size
= mem
->am_size
;
965 mi
->ami_physical
= mem
->am_physical
;
966 mi
->ami_offset
= mem
->am_offset
;
967 mi
->ami_is_bound
= mem
->am_is_bound
;