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("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/malloc.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
39 #include <sys/ioccom.h>
40 #include <sys/agpio.h>
42 #include <sys/mutex.h>
45 #include <dev/agp/agppriv.h>
46 #include <dev/agp/agpvar.h>
47 #include <dev/agp/agpreg.h>
48 #include <dev/pci/pcivar.h>
49 #include <dev/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>
58 #include <machine/bus.h>
59 #include <machine/resource.h>
62 MODULE_VERSION(agp, 1);
64 MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
67 static d_open_t agp_open;
68 static d_close_t agp_close;
69 static d_ioctl_t agp_ioctl;
70 static d_mmap_t agp_mmap;
72 static struct cdevsw agp_cdevsw = {
73 .d_version = D_VERSION,
74 .d_flags = D_NEEDGIANT,
82 static devclass_t agp_devclass;
83 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, dev2unit(kdev))
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_extcap(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.
222 if (sc->as_aperture_rid == 0)
223 sc->as_aperture_rid = AGP_APBASE;
225 sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
226 &sc->as_aperture_rid, RF_SHAREABLE);
227 if (!sc->as_aperture)
231 * Work out an upper bound for agp memory allocation. This
232 * uses a heurisitc table from the Linux driver.
234 memsize = ptoa(Maxmem) >> 20;
235 for (i = 0; i < agp_max_size; i++) {
236 if (memsize <= agp_max[i][0])
239 if (i == agp_max_size) i = agp_max_size - 1;
240 sc->as_maxmem = agp_max[i][1] << 20U;
243 * The lock is used to prevent re-entry to
244 * agp_generic_bind_memory() since that function can sleep.
246 mtx_init(&sc->as_lock, "agp lock", NULL, MTX_DEF);
249 * Initialise stuff for the userland device.
251 agp_devclass = devclass_find("agp");
252 TAILQ_INIT(&sc->as_memory);
255 sc->as_devnode = make_dev(&agp_cdevsw,
256 device_get_unit(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 bus_release_resource(dev, SYS_RES_MEMORY, sc->as_aperture_rid,
280 mtx_destroy(&sc->as_lock);
285 agp_generic_detach(device_t dev)
294 * Default AGP aperture size detection which simply returns the size of
295 * the aperture's PCI resource.
298 agp_generic_get_aperture(device_t dev)
300 struct agp_softc *sc = device_get_softc(dev);
302 return rman_get_size(sc->as_aperture);
306 * Default AGP aperture size setting function, which simply doesn't allow
307 * changes to resource size.
310 agp_generic_set_aperture(device_t dev, u_int32_t aperture)
312 u_int32_t current_aperture;
314 current_aperture = AGP_GET_APERTURE(dev);
315 if (current_aperture != aperture)
322 * This does the enable logic for v3, with the same topology
323 * restrictions as in place for v2 -- one bus, one device on the bus.
326 agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
328 u_int32_t tstatus, mstatus;
330 int rq, sba, fw, rate, arqsz, cal;
332 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
333 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
335 /* Set RQ to the min of mode, tstatus and mstatus */
336 rq = AGP_MODE_GET_RQ(mode);
337 if (AGP_MODE_GET_RQ(tstatus) < rq)
338 rq = AGP_MODE_GET_RQ(tstatus);
339 if (AGP_MODE_GET_RQ(mstatus) < rq)
340 rq = AGP_MODE_GET_RQ(mstatus);
343 * ARQSZ - Set the value to the maximum one.
344 * Don't allow the mode register to override values.
346 arqsz = AGP_MODE_GET_ARQSZ(mode);
347 if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
348 rq = AGP_MODE_GET_ARQSZ(tstatus);
349 if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
350 rq = AGP_MODE_GET_ARQSZ(mstatus);
352 /* Calibration cycle - don't allow override by mode register */
353 cal = AGP_MODE_GET_CAL(tstatus);
354 if (AGP_MODE_GET_CAL(mstatus) < cal)
355 cal = AGP_MODE_GET_CAL(mstatus);
357 /* SBA must be supported for AGP v3. */
360 /* Set FW if all three support it. */
361 fw = (AGP_MODE_GET_FW(tstatus)
362 & AGP_MODE_GET_FW(mstatus)
363 & AGP_MODE_GET_FW(mode));
365 /* Figure out the max rate */
366 rate = (AGP_MODE_GET_RATE(tstatus)
367 & AGP_MODE_GET_RATE(mstatus)
368 & AGP_MODE_GET_RATE(mode));
369 if (rate & AGP_MODE_V3_RATE_8x)
370 rate = AGP_MODE_V3_RATE_8x;
372 rate = AGP_MODE_V3_RATE_4x;
374 device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
376 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
378 /* Construct the new mode word and tell the hardware */
380 command = AGP_MODE_SET_RQ(0, rq);
381 command = AGP_MODE_SET_ARQSZ(command, arqsz);
382 command = AGP_MODE_SET_CAL(command, cal);
383 command = AGP_MODE_SET_SBA(command, sba);
384 command = AGP_MODE_SET_FW(command, fw);
385 command = AGP_MODE_SET_RATE(command, rate);
386 command = AGP_MODE_SET_MODE_3(command, 1);
387 command = AGP_MODE_SET_AGP(command, 1);
388 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
389 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
395 agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
397 u_int32_t tstatus, mstatus;
399 int rq, sba, fw, rate;
401 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
402 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
404 /* Set RQ to the min of mode, tstatus and mstatus */
405 rq = AGP_MODE_GET_RQ(mode);
406 if (AGP_MODE_GET_RQ(tstatus) < rq)
407 rq = AGP_MODE_GET_RQ(tstatus);
408 if (AGP_MODE_GET_RQ(mstatus) < rq)
409 rq = AGP_MODE_GET_RQ(mstatus);
411 /* Set SBA if all three can deal with SBA */
412 sba = (AGP_MODE_GET_SBA(tstatus)
413 & AGP_MODE_GET_SBA(mstatus)
414 & AGP_MODE_GET_SBA(mode));
417 fw = (AGP_MODE_GET_FW(tstatus)
418 & AGP_MODE_GET_FW(mstatus)
419 & AGP_MODE_GET_FW(mode));
421 /* Figure out the max rate */
422 rate = (AGP_MODE_GET_RATE(tstatus)
423 & AGP_MODE_GET_RATE(mstatus)
424 & AGP_MODE_GET_RATE(mode));
425 if (rate & AGP_MODE_V2_RATE_4x)
426 rate = AGP_MODE_V2_RATE_4x;
427 else if (rate & AGP_MODE_V2_RATE_2x)
428 rate = AGP_MODE_V2_RATE_2x;
430 rate = AGP_MODE_V2_RATE_1x;
432 device_printf(dev, "Setting AGP v2 mode %d\n", rate);
434 /* Construct the new mode word and tell the hardware */
436 command = AGP_MODE_SET_RQ(0, rq);
437 command = AGP_MODE_SET_SBA(command, sba);
438 command = AGP_MODE_SET_FW(command, fw);
439 command = AGP_MODE_SET_RATE(command, rate);
440 command = AGP_MODE_SET_AGP(command, 1);
441 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
442 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
448 agp_generic_enable(device_t dev, u_int32_t mode)
450 device_t mdev = agp_find_display();
451 u_int32_t tstatus, mstatus;
454 AGP_DPF("can't find display\n");
458 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
459 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
462 * Check display and bridge for AGP v3 support. AGP v3 allows
463 * more variety in topology than v2, e.g. multiple AGP devices
464 * attached to one bridge, or multiple AGP bridges in one
465 * system. This doesn't attempt to address those situations,
466 * but should work fine for a classic single AGP slot system
469 if (AGP_MODE_GET_MODE_3(mode) &&
470 AGP_MODE_GET_MODE_3(tstatus) &&
471 AGP_MODE_GET_MODE_3(mstatus))
472 return (agp_v3_enable(dev, mdev, mode));
474 return (agp_v2_enable(dev, mdev, mode));
478 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
480 struct agp_softc *sc = device_get_softc(dev);
481 struct agp_memory *mem;
483 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
486 if (sc->as_allocated + size > sc->as_maxmem)
490 printf("agp_generic_alloc_memory: unsupported type %d\n",
495 mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
496 mem->am_id = sc->as_nextid++;
499 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
500 mem->am_physical = 0;
502 mem->am_is_bound = 0;
503 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
504 sc->as_allocated += size;
510 agp_generic_free_memory(device_t dev, struct agp_memory *mem)
512 struct agp_softc *sc = device_get_softc(dev);
514 if (mem->am_is_bound)
517 sc->as_allocated -= mem->am_size;
518 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
519 vm_object_deallocate(mem->am_obj);
525 agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
528 struct agp_softc *sc = device_get_softc(dev);
533 /* Do some sanity checks first. */
534 if (offset < 0 || (offset & (AGP_PAGE_SIZE - 1)) != 0 ||
535 offset + mem->am_size > AGP_GET_APERTURE(dev)) {
536 device_printf(dev, "binding memory at bad offset %#x\n",
542 * Allocate the pages early, before acquiring the lock,
543 * because vm_page_grab() used with VM_ALLOC_RETRY may
544 * block and we can't hold a mutex while blocking.
546 VM_OBJECT_LOCK(mem->am_obj);
547 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
549 * Find a page from the object and wire it
550 * down. This page will be mapped using one or more
551 * entries in the GATT (assuming that PAGE_SIZE >=
552 * AGP_PAGE_SIZE. If this is the first call to bind,
553 * the pages will be allocated and zeroed.
555 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
556 VM_ALLOC_WIRED | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
557 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
559 VM_OBJECT_UNLOCK(mem->am_obj);
561 mtx_lock(&sc->as_lock);
563 if (mem->am_is_bound) {
564 device_printf(dev, "memory already bound\n");
566 VM_OBJECT_LOCK(mem->am_obj);
571 * Bind the individual pages and flush the chipset's
574 VM_OBJECT_LOCK(mem->am_obj);
575 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
576 m = vm_page_lookup(mem->am_obj, OFF_TO_IDX(i));
579 * Install entries in the GATT, making sure that if
580 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
581 * aligned to PAGE_SIZE, we don't modify too many GATT
584 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
585 j += AGP_PAGE_SIZE) {
586 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
587 AGP_DPF("binding offset %#x to pa %#x\n",
589 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
592 * Bail out. Reverse all the mappings
593 * and unwire the pages.
596 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
597 AGP_UNBIND_PAGE(dev, offset + k);
603 VM_OBJECT_UNLOCK(mem->am_obj);
606 * Flush the cpu cache since we are providing a new mapping
612 * Make sure the chipset gets the new mappings.
616 mem->am_offset = offset;
617 mem->am_is_bound = 1;
619 mtx_unlock(&sc->as_lock);
623 mtx_unlock(&sc->as_lock);
624 VM_OBJECT_LOCK_ASSERT(mem->am_obj, MA_OWNED);
625 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
626 m = vm_page_lookup(mem->am_obj, OFF_TO_IDX(i));
627 vm_page_lock_queues();
628 vm_page_unwire(m, 0);
629 vm_page_unlock_queues();
631 VM_OBJECT_UNLOCK(mem->am_obj);
637 agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
639 struct agp_softc *sc = device_get_softc(dev);
643 mtx_lock(&sc->as_lock);
645 if (!mem->am_is_bound) {
646 device_printf(dev, "memory is not bound\n");
647 mtx_unlock(&sc->as_lock);
653 * Unbind the individual pages and flush the chipset's
654 * TLB. Unwire the pages so they can be swapped.
656 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
657 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
658 VM_OBJECT_LOCK(mem->am_obj);
659 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
660 m = vm_page_lookup(mem->am_obj, atop(i));
661 vm_page_lock_queues();
662 vm_page_unwire(m, 0);
663 vm_page_unlock_queues();
665 VM_OBJECT_UNLOCK(mem->am_obj);
671 mem->am_is_bound = 0;
673 mtx_unlock(&sc->as_lock);
678 /* Helper functions for implementing user/kernel api */
681 agp_acquire_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)
687 sc->as_state = state;
693 agp_release_helper(device_t dev, enum agp_acquire_state state)
695 struct agp_softc *sc = device_get_softc(dev);
697 if (sc->as_state == AGP_ACQUIRE_FREE)
700 if (sc->as_state != state)
703 sc->as_state = AGP_ACQUIRE_FREE;
707 static struct agp_memory *
708 agp_find_memory(device_t dev, int id)
710 struct agp_softc *sc = device_get_softc(dev);
711 struct agp_memory *mem;
713 AGP_DPF("searching for memory block %d\n", id);
714 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
715 AGP_DPF("considering memory block %d\n", mem->am_id);
716 if (mem->am_id == id)
722 /* Implementation of the userland ioctl api */
725 agp_info_user(device_t dev, agp_info *info)
727 struct agp_softc *sc = device_get_softc(dev);
729 bzero(info, sizeof *info);
730 info->bridge_id = pci_get_devid(dev);
732 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
733 info->aper_base = rman_get_start(sc->as_aperture);
734 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
735 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
736 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
742 agp_setup_user(device_t dev, agp_setup *setup)
744 return AGP_ENABLE(dev, setup->agp_mode);
748 agp_allocate_user(device_t dev, agp_allocate *alloc)
750 struct agp_memory *mem;
752 mem = AGP_ALLOC_MEMORY(dev,
754 alloc->pg_count << AGP_PAGE_SHIFT);
756 alloc->key = mem->am_id;
757 alloc->physical = mem->am_physical;
765 agp_deallocate_user(device_t dev, int id)
767 struct agp_memory *mem = agp_find_memory(dev, id);;
770 AGP_FREE_MEMORY(dev, mem);
778 agp_bind_user(device_t dev, agp_bind *bind)
780 struct agp_memory *mem = agp_find_memory(dev, bind->key);
785 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
789 agp_unbind_user(device_t dev, agp_unbind *unbind)
791 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
796 return AGP_UNBIND_MEMORY(dev, mem);
800 agp_open(struct cdev *kdev, int oflags, int devtype, struct thread *td)
802 device_t dev = KDEV2DEV(kdev);
803 struct agp_softc *sc = device_get_softc(dev);
805 if (!sc->as_isopen) {
814 agp_close(struct cdev *kdev, int fflag, int devtype, struct thread *td)
816 device_t dev = KDEV2DEV(kdev);
817 struct agp_softc *sc = device_get_softc(dev);
818 struct agp_memory *mem;
821 * Clear the GATT and force release on last close
823 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
824 if (mem->am_is_bound)
825 AGP_UNBIND_MEMORY(dev, mem);
826 AGP_FREE_MEMORY(dev, mem);
828 if (sc->as_state == AGP_ACQUIRE_USER)
829 agp_release_helper(dev, AGP_ACQUIRE_USER);
837 agp_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int fflag, struct thread *td)
839 device_t dev = KDEV2DEV(kdev);
843 return agp_info_user(dev, (agp_info *) data);
846 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
849 return agp_release_helper(dev, AGP_ACQUIRE_USER);
852 return agp_setup_user(dev, (agp_setup *)data);
854 case AGPIOC_ALLOCATE:
855 return agp_allocate_user(dev, (agp_allocate *)data);
857 case AGPIOC_DEALLOCATE:
858 return agp_deallocate_user(dev, *(int *) data);
861 return agp_bind_user(dev, (agp_bind *)data);
864 return agp_unbind_user(dev, (agp_unbind *)data);
872 agp_mmap(struct cdev *kdev, vm_offset_t offset, vm_paddr_t *paddr, int prot)
874 device_t dev = KDEV2DEV(kdev);
875 struct agp_softc *sc = device_get_softc(dev);
877 if (offset > AGP_GET_APERTURE(dev))
879 *paddr = rman_get_start(sc->as_aperture) + offset;
883 /* Implementation of the kernel api */
888 device_t *children, child;
893 if (devclass_get_devices(agp_devclass, &children, &count) != 0)
896 for (i = 0; i < count; i++) {
897 if (device_is_attached(children[i])) {
902 free(children, M_TEMP);
906 enum agp_acquire_state
907 agp_state(device_t dev)
909 struct agp_softc *sc = device_get_softc(dev);
914 agp_get_info(device_t dev, struct agp_info *info)
916 struct agp_softc *sc = device_get_softc(dev);
919 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
920 info->ai_aperture_base = rman_get_start(sc->as_aperture);
921 info->ai_aperture_size = rman_get_size(sc->as_aperture);
922 info->ai_memory_allowed = sc->as_maxmem;
923 info->ai_memory_used = sc->as_allocated;
927 agp_acquire(device_t dev)
929 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
933 agp_release(device_t dev)
935 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
939 agp_enable(device_t dev, u_int32_t mode)
941 return AGP_ENABLE(dev, mode);
944 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
946 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
949 void agp_free_memory(device_t dev, void *handle)
951 struct agp_memory *mem = (struct agp_memory *) handle;
952 AGP_FREE_MEMORY(dev, mem);
955 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
957 struct agp_memory *mem = (struct agp_memory *) handle;
958 return AGP_BIND_MEMORY(dev, mem, offset);
961 int agp_unbind_memory(device_t dev, void *handle)
963 struct agp_memory *mem = (struct agp_memory *) handle;
964 return AGP_UNBIND_MEMORY(dev, mem);
967 void agp_memory_info(device_t dev, void *handle, struct
970 struct agp_memory *mem = (struct agp_memory *) handle;
972 mi->ami_size = mem->am_size;
973 mi->ami_physical = mem->am_physical;
974 mi->ami_offset = mem->am_offset;
975 mi->ami_is_bound = mem->am_is_bound;