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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
40 #include <sys/ioccom.h>
41 #include <sys/agpio.h>
43 #include <sys/mutex.h>
46 #include <dev/agp/agppriv.h>
47 #include <dev/agp/agpvar.h>
48 #include <dev/agp/agpreg.h>
49 #include <dev/pci/pcivar.h>
50 #include <dev/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>
59 #include <machine/bus.h>
60 #include <machine/resource.h>
63 MODULE_VERSION(agp, 1);
65 MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
68 static d_open_t agp_open;
69 static d_close_t agp_close;
70 static d_ioctl_t agp_ioctl;
71 static d_mmap_t agp_mmap;
73 static struct cdevsw agp_cdevsw = {
74 .d_version = D_VERSION,
75 .d_flags = D_NEEDGIANT,
83 static devclass_t agp_devclass;
85 /* Helper functions for implementing chipset mini drivers. */
90 #if defined(__i386__) || defined(__amd64__)
96 agp_find_caps(device_t dev)
101 if (pci_find_cap(dev, PCIY_AGP, &capreg) != 0)
107 * Find an AGP display device (if any).
110 agp_find_display(void)
112 devclass_t pci = devclass_find("pci");
113 device_t bus, dev = 0;
115 int busnum, numkids, i;
117 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
118 bus = devclass_get_device(pci, busnum);
121 if (device_get_children(bus, &kids, &numkids) != 0)
123 for (i = 0; i < numkids; i++) {
125 if (pci_get_class(dev) == PCIC_DISPLAY
126 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
127 if (agp_find_caps(dev)) {
140 agp_alloc_gatt(device_t dev)
142 u_int32_t apsize = AGP_GET_APERTURE(dev);
143 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
144 struct agp_gatt *gatt;
148 "allocating GATT for aperture of size %dM\n",
149 apsize / (1024*1024));
152 device_printf(dev, "bad aperture size\n");
156 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
160 gatt->ag_entries = entries;
161 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP, 0,
162 0, ~0, PAGE_SIZE, 0);
163 if (!gatt->ag_virtual) {
165 device_printf(dev, "contiguous allocation failed\n");
169 bzero(gatt->ag_virtual, entries * sizeof(u_int32_t));
170 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
177 agp_free_gatt(struct agp_gatt *gatt)
179 contigfree(gatt->ag_virtual,
180 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
184 static u_int agp_max[][2] = {
195 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
198 * Sets the PCI resource which represents the AGP aperture.
200 * If not called, the default AGP aperture resource of AGP_APBASE will
201 * be used. Must be called before agp_generic_attach().
204 agp_set_aperture_resource(device_t dev, int rid)
206 struct agp_softc *sc = device_get_softc(dev);
208 sc->as_aperture_rid = rid;
212 agp_generic_attach(device_t dev)
214 struct agp_softc *sc = device_get_softc(dev);
219 * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
220 * because the kernel doesn't need to map it.
223 if (sc->as_aperture_rid != -1) {
224 if (sc->as_aperture_rid == 0)
225 sc->as_aperture_rid = AGP_APBASE;
227 sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
228 &sc->as_aperture_rid, RF_SHAREABLE);
229 if (!sc->as_aperture)
234 * Work out an upper bound for agp memory allocation. This
235 * uses a heurisitc table from the Linux driver.
237 memsize = ptoa(Maxmem) >> 20;
238 for (i = 0; i < agp_max_size; i++) {
239 if (memsize <= agp_max[i][0])
242 if (i == agp_max_size) i = agp_max_size - 1;
243 sc->as_maxmem = agp_max[i][1] << 20U;
246 * The lock is used to prevent re-entry to
247 * agp_generic_bind_memory() since that function can sleep.
249 mtx_init(&sc->as_lock, "agp lock", NULL, MTX_DEF);
252 * Initialise stuff for the userland device.
254 agp_devclass = devclass_find("agp");
255 TAILQ_INIT(&sc->as_memory);
258 sc->as_devnode = make_dev(&agp_cdevsw,
259 0, UID_ROOT, GID_WHEEL, 0600, "agpgart");
260 sc->as_devnode->si_drv1 = dev;
266 agp_free_cdev(device_t dev)
268 struct agp_softc *sc = device_get_softc(dev);
270 destroy_dev(sc->as_devnode);
274 agp_free_res(device_t dev)
276 struct agp_softc *sc = device_get_softc(dev);
278 if (sc->as_aperture != NULL)
279 bus_release_resource(dev, SYS_RES_MEMORY, sc->as_aperture_rid,
281 mtx_destroy(&sc->as_lock);
286 agp_generic_detach(device_t dev)
295 * Default AGP aperture size detection which simply returns the size of
296 * the aperture's PCI resource.
299 agp_generic_get_aperture(device_t dev)
301 struct agp_softc *sc = device_get_softc(dev);
303 return rman_get_size(sc->as_aperture);
307 * Default AGP aperture size setting function, which simply doesn't allow
308 * changes to resource size.
311 agp_generic_set_aperture(device_t dev, u_int32_t aperture)
313 u_int32_t current_aperture;
315 current_aperture = AGP_GET_APERTURE(dev);
316 if (current_aperture != aperture)
323 * This does the enable logic for v3, with the same topology
324 * restrictions as in place for v2 -- one bus, one device on the bus.
327 agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
329 u_int32_t tstatus, mstatus;
331 int rq, sba, fw, rate, arqsz, cal;
333 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
334 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
336 /* Set RQ to the min of mode, tstatus and mstatus */
337 rq = AGP_MODE_GET_RQ(mode);
338 if (AGP_MODE_GET_RQ(tstatus) < rq)
339 rq = AGP_MODE_GET_RQ(tstatus);
340 if (AGP_MODE_GET_RQ(mstatus) < rq)
341 rq = AGP_MODE_GET_RQ(mstatus);
344 * ARQSZ - Set the value to the maximum one.
345 * Don't allow the mode register to override values.
347 arqsz = AGP_MODE_GET_ARQSZ(mode);
348 if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
349 rq = AGP_MODE_GET_ARQSZ(tstatus);
350 if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
351 rq = AGP_MODE_GET_ARQSZ(mstatus);
353 /* Calibration cycle - don't allow override by mode register */
354 cal = AGP_MODE_GET_CAL(tstatus);
355 if (AGP_MODE_GET_CAL(mstatus) < cal)
356 cal = AGP_MODE_GET_CAL(mstatus);
358 /* SBA must be supported for AGP v3. */
361 /* Set FW if all three support it. */
362 fw = (AGP_MODE_GET_FW(tstatus)
363 & AGP_MODE_GET_FW(mstatus)
364 & AGP_MODE_GET_FW(mode));
366 /* Figure out the max rate */
367 rate = (AGP_MODE_GET_RATE(tstatus)
368 & AGP_MODE_GET_RATE(mstatus)
369 & AGP_MODE_GET_RATE(mode));
370 if (rate & AGP_MODE_V3_RATE_8x)
371 rate = AGP_MODE_V3_RATE_8x;
373 rate = AGP_MODE_V3_RATE_4x;
375 device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
377 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
379 /* Construct the new mode word and tell the hardware */
381 command = AGP_MODE_SET_RQ(0, rq);
382 command = AGP_MODE_SET_ARQSZ(command, arqsz);
383 command = AGP_MODE_SET_CAL(command, cal);
384 command = AGP_MODE_SET_SBA(command, sba);
385 command = AGP_MODE_SET_FW(command, fw);
386 command = AGP_MODE_SET_RATE(command, rate);
387 command = AGP_MODE_SET_MODE_3(command, 1);
388 command = AGP_MODE_SET_AGP(command, 1);
389 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
390 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
396 agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
398 u_int32_t tstatus, mstatus;
400 int rq, sba, fw, rate;
402 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
403 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
405 /* Set RQ to the min of mode, tstatus and mstatus */
406 rq = AGP_MODE_GET_RQ(mode);
407 if (AGP_MODE_GET_RQ(tstatus) < rq)
408 rq = AGP_MODE_GET_RQ(tstatus);
409 if (AGP_MODE_GET_RQ(mstatus) < rq)
410 rq = AGP_MODE_GET_RQ(mstatus);
412 /* Set SBA if all three can deal with SBA */
413 sba = (AGP_MODE_GET_SBA(tstatus)
414 & AGP_MODE_GET_SBA(mstatus)
415 & AGP_MODE_GET_SBA(mode));
418 fw = (AGP_MODE_GET_FW(tstatus)
419 & AGP_MODE_GET_FW(mstatus)
420 & AGP_MODE_GET_FW(mode));
422 /* Figure out the max rate */
423 rate = (AGP_MODE_GET_RATE(tstatus)
424 & AGP_MODE_GET_RATE(mstatus)
425 & AGP_MODE_GET_RATE(mode));
426 if (rate & AGP_MODE_V2_RATE_4x)
427 rate = AGP_MODE_V2_RATE_4x;
428 else if (rate & AGP_MODE_V2_RATE_2x)
429 rate = AGP_MODE_V2_RATE_2x;
431 rate = AGP_MODE_V2_RATE_1x;
433 device_printf(dev, "Setting AGP v2 mode %d\n", rate);
435 /* Construct the new mode word and tell the hardware */
437 command = AGP_MODE_SET_RQ(0, rq);
438 command = AGP_MODE_SET_SBA(command, sba);
439 command = AGP_MODE_SET_FW(command, fw);
440 command = AGP_MODE_SET_RATE(command, rate);
441 command = AGP_MODE_SET_AGP(command, 1);
442 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
443 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
449 agp_generic_enable(device_t dev, u_int32_t mode)
451 device_t mdev = agp_find_display();
452 u_int32_t tstatus, mstatus;
455 AGP_DPF("can't find display\n");
459 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
460 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
463 * Check display and bridge for AGP v3 support. AGP v3 allows
464 * more variety in topology than v2, e.g. multiple AGP devices
465 * attached to one bridge, or multiple AGP bridges in one
466 * system. This doesn't attempt to address those situations,
467 * but should work fine for a classic single AGP slot system
470 if (AGP_MODE_GET_MODE_3(mode) &&
471 AGP_MODE_GET_MODE_3(tstatus) &&
472 AGP_MODE_GET_MODE_3(mstatus))
473 return (agp_v3_enable(dev, mdev, mode));
475 return (agp_v2_enable(dev, mdev, mode));
479 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
481 struct agp_softc *sc = device_get_softc(dev);
482 struct agp_memory *mem;
484 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
487 if (sc->as_allocated + size > sc->as_maxmem)
491 printf("agp_generic_alloc_memory: unsupported type %d\n",
496 mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
497 mem->am_id = sc->as_nextid++;
500 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
501 mem->am_physical = 0;
503 mem->am_is_bound = 0;
504 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
505 sc->as_allocated += size;
511 agp_generic_free_memory(device_t dev, struct agp_memory *mem)
513 struct agp_softc *sc = device_get_softc(dev);
515 if (mem->am_is_bound)
518 sc->as_allocated -= mem->am_size;
519 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
520 vm_object_deallocate(mem->am_obj);
526 agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
529 struct agp_softc *sc = device_get_softc(dev);
534 /* Do some sanity checks first. */
535 if ((offset & (AGP_PAGE_SIZE - 1)) != 0 ||
536 offset + mem->am_size > AGP_GET_APERTURE(dev)) {
537 device_printf(dev, "binding memory at bad offset %#x\n",
543 * Allocate the pages early, before acquiring the lock,
544 * because vm_page_grab() may sleep and we can't hold a mutex
547 VM_OBJECT_LOCK(mem->am_obj);
548 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
550 * Find a page from the object and wire it
551 * down. This page will be mapped using one or more
552 * entries in the GATT (assuming that PAGE_SIZE >=
553 * AGP_PAGE_SIZE. If this is the first call to bind,
554 * the pages will be allocated and zeroed.
556 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
557 VM_ALLOC_WIRED | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
558 AGP_DPF("found page pa=%#jx\n", (uintmax_t)VM_PAGE_TO_PHYS(m));
560 VM_OBJECT_UNLOCK(mem->am_obj);
562 mtx_lock(&sc->as_lock);
564 if (mem->am_is_bound) {
565 device_printf(dev, "memory already bound\n");
567 VM_OBJECT_LOCK(mem->am_obj);
573 * Bind the individual pages and flush the chipset's
576 VM_OBJECT_LOCK(mem->am_obj);
577 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
578 m = vm_page_lookup(mem->am_obj, OFF_TO_IDX(i));
581 * Install entries in the GATT, making sure that if
582 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
583 * aligned to PAGE_SIZE, we don't modify too many GATT
586 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
587 j += AGP_PAGE_SIZE) {
588 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
589 AGP_DPF("binding offset %#jx to pa %#jx\n",
590 (uintmax_t)offset + i + j, (uintmax_t)pa);
591 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
594 * Bail out. Reverse all the mappings
595 * and unwire the pages.
597 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
598 AGP_UNBIND_PAGE(dev, offset + k);
604 VM_OBJECT_UNLOCK(mem->am_obj);
607 * Flush the cpu cache since we are providing a new mapping
613 * Make sure the chipset gets the new mappings.
617 mem->am_offset = offset;
618 mem->am_is_bound = 1;
620 mtx_unlock(&sc->as_lock);
624 mtx_unlock(&sc->as_lock);
625 VM_OBJECT_LOCK_ASSERT(mem->am_obj, MA_OWNED);
626 for (k = 0; k < mem->am_size; k += PAGE_SIZE) {
627 m = vm_page_lookup(mem->am_obj, OFF_TO_IDX(k));
631 vm_page_unwire(m, 0);
634 VM_OBJECT_UNLOCK(mem->am_obj);
640 agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
642 struct agp_softc *sc = device_get_softc(dev);
646 mtx_lock(&sc->as_lock);
648 if (!mem->am_is_bound) {
649 device_printf(dev, "memory is not bound\n");
650 mtx_unlock(&sc->as_lock);
656 * Unbind the individual pages and flush the chipset's
657 * TLB. Unwire the pages so they can be swapped.
659 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
660 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
661 VM_OBJECT_LOCK(mem->am_obj);
662 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
663 m = vm_page_lookup(mem->am_obj, atop(i));
665 vm_page_unwire(m, 0);
668 VM_OBJECT_UNLOCK(mem->am_obj);
674 mem->am_is_bound = 0;
676 mtx_unlock(&sc->as_lock);
681 /* Helper functions for implementing user/kernel api */
684 agp_acquire_helper(device_t dev, enum agp_acquire_state state)
686 struct agp_softc *sc = device_get_softc(dev);
688 if (sc->as_state != AGP_ACQUIRE_FREE)
690 sc->as_state = state;
696 agp_release_helper(device_t dev, enum agp_acquire_state state)
698 struct agp_softc *sc = device_get_softc(dev);
700 if (sc->as_state == AGP_ACQUIRE_FREE)
703 if (sc->as_state != state)
706 sc->as_state = AGP_ACQUIRE_FREE;
710 static struct agp_memory *
711 agp_find_memory(device_t dev, int id)
713 struct agp_softc *sc = device_get_softc(dev);
714 struct agp_memory *mem;
716 AGP_DPF("searching for memory block %d\n", id);
717 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
718 AGP_DPF("considering memory block %d\n", mem->am_id);
719 if (mem->am_id == id)
725 /* Implementation of the userland ioctl api */
728 agp_info_user(device_t dev, agp_info *info)
730 struct agp_softc *sc = device_get_softc(dev);
732 bzero(info, sizeof *info);
733 info->bridge_id = pci_get_devid(dev);
735 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
737 info->aper_base = rman_get_start(sc->as_aperture);
740 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
741 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
742 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
748 agp_setup_user(device_t dev, agp_setup *setup)
750 return AGP_ENABLE(dev, setup->agp_mode);
754 agp_allocate_user(device_t dev, agp_allocate *alloc)
756 struct agp_memory *mem;
758 mem = AGP_ALLOC_MEMORY(dev,
760 alloc->pg_count << AGP_PAGE_SHIFT);
762 alloc->key = mem->am_id;
763 alloc->physical = mem->am_physical;
771 agp_deallocate_user(device_t dev, int id)
773 struct agp_memory *mem = agp_find_memory(dev, id);
776 AGP_FREE_MEMORY(dev, mem);
784 agp_bind_user(device_t dev, agp_bind *bind)
786 struct agp_memory *mem = agp_find_memory(dev, bind->key);
791 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
795 agp_unbind_user(device_t dev, agp_unbind *unbind)
797 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
802 return AGP_UNBIND_MEMORY(dev, mem);
806 agp_open(struct cdev *kdev, int oflags, int devtype, struct thread *td)
808 device_t dev = kdev->si_drv1;
809 struct agp_softc *sc = device_get_softc(dev);
811 if (!sc->as_isopen) {
820 agp_close(struct cdev *kdev, int fflag, int devtype, struct thread *td)
822 device_t dev = kdev->si_drv1;
823 struct agp_softc *sc = device_get_softc(dev);
824 struct agp_memory *mem;
827 * Clear the GATT and force release on last close
829 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
830 if (mem->am_is_bound)
831 AGP_UNBIND_MEMORY(dev, mem);
832 AGP_FREE_MEMORY(dev, mem);
834 if (sc->as_state == AGP_ACQUIRE_USER)
835 agp_release_helper(dev, AGP_ACQUIRE_USER);
843 agp_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int fflag, struct thread *td)
845 device_t dev = kdev->si_drv1;
849 return agp_info_user(dev, (agp_info *) data);
852 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
855 return agp_release_helper(dev, AGP_ACQUIRE_USER);
858 return agp_setup_user(dev, (agp_setup *)data);
860 case AGPIOC_ALLOCATE:
861 return agp_allocate_user(dev, (agp_allocate *)data);
863 case AGPIOC_DEALLOCATE:
864 return agp_deallocate_user(dev, *(int *) data);
867 return agp_bind_user(dev, (agp_bind *)data);
870 return agp_unbind_user(dev, (agp_unbind *)data);
878 agp_mmap(struct cdev *kdev, vm_ooffset_t offset, vm_paddr_t *paddr,
879 int prot, vm_memattr_t *memattr)
881 device_t dev = kdev->si_drv1;
882 struct agp_softc *sc = device_get_softc(dev);
884 if (offset > AGP_GET_APERTURE(dev))
886 if (sc->as_aperture == NULL)
888 *paddr = rman_get_start(sc->as_aperture) + offset;
892 /* Implementation of the kernel api */
897 device_t *children, child;
902 if (devclass_get_devices(agp_devclass, &children, &count) != 0)
905 for (i = 0; i < count; i++) {
906 if (device_is_attached(children[i])) {
911 free(children, M_TEMP);
915 enum agp_acquire_state
916 agp_state(device_t dev)
918 struct agp_softc *sc = device_get_softc(dev);
923 agp_get_info(device_t dev, struct agp_info *info)
925 struct agp_softc *sc = device_get_softc(dev);
928 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
929 if (sc->as_aperture != NULL)
930 info->ai_aperture_base = rman_get_start(sc->as_aperture);
932 info->ai_aperture_base = 0;
933 info->ai_aperture_size = AGP_GET_APERTURE(dev);
934 info->ai_memory_allowed = sc->as_maxmem;
935 info->ai_memory_used = sc->as_allocated;
939 agp_acquire(device_t dev)
941 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
945 agp_release(device_t dev)
947 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
951 agp_enable(device_t dev, u_int32_t mode)
953 return AGP_ENABLE(dev, mode);
956 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
958 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
961 void agp_free_memory(device_t dev, void *handle)
963 struct agp_memory *mem = (struct agp_memory *) handle;
964 AGP_FREE_MEMORY(dev, mem);
967 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
969 struct agp_memory *mem = (struct agp_memory *) handle;
970 return AGP_BIND_MEMORY(dev, mem, offset);
973 int agp_unbind_memory(device_t dev, void *handle)
975 struct agp_memory *mem = (struct agp_memory *) handle;
976 return AGP_UNBIND_MEMORY(dev, mem);
979 void agp_memory_info(device_t dev, void *handle, struct
982 struct agp_memory *mem = (struct agp_memory *) handle;
984 mi->ami_size = mem->am_size;
985 mi->ami_physical = mem->am_physical;
986 mi->ami_offset = mem->am_offset;
987 mi->ami_is_bound = mem->am_is_bound;