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/pci/agp.c,v 1.3.2.4 2002/08/11 19:58:12 alc Exp $
27 * $DragonFly: src/sys/dev/agp/agp.c,v 1.9 2004/01/20 05:04:03 dillon Exp $
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/kernel.h>
39 #include <sys/ioccom.h>
40 #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>
57 #include <machine/bus.h>
58 #include <machine/resource.h>
61 MODULE_VERSION(agp, 1);
63 MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
65 #define CDEV_MAJOR 148
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 = {
80 /* close */ agp_close,
83 /* ioctl */ agp_ioctl,
86 /* strategy */ nostrategy,
91 static devclass_t agp_devclass;
92 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
94 /* Helper functions for implementing chipset mini drivers. */
105 agp_find_caps(device_t dev)
111 * Check the CAP_LIST bit of the PCI status register first.
113 status = pci_read_config(dev, PCIR_STATUS, 2);
114 if (!(status & 0x10))
118 * Traverse the capabilities list.
120 for (ptr = pci_read_config(dev, AGP_CAPPTR, 1);
123 u_int32_t capid = pci_read_config(dev, ptr, 4);
124 next = AGP_CAPID_GET_NEXT_PTR(capid);
127 * If this capability entry ID is 2, then we are done.
129 if (AGP_CAPID_GET_CAP_ID(capid) == 2)
137 * Find an AGP display device (if any).
140 agp_find_display(void)
142 devclass_t pci = devclass_find("pci");
143 device_t bus, dev = 0;
145 int busnum, numkids, i;
147 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
148 bus = devclass_get_device(pci, busnum);
151 device_get_children(bus, &kids, &numkids);
152 for (i = 0; i < numkids; i++) {
154 if (pci_get_class(dev) == PCIC_DISPLAY
155 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
156 if (agp_find_caps(dev)) {
169 agp_alloc_gatt(device_t dev)
171 u_int32_t apsize = AGP_GET_APERTURE(dev);
172 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
173 struct agp_gatt *gatt;
177 "allocating GATT for aperture of size %dM\n",
178 apsize / (1024*1024));
181 device_printf(dev, "bad aperture size\n");
185 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
189 gatt->ag_entries = entries;
190 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP, 0,
191 0, ~0, PAGE_SIZE, 0);
192 if (!gatt->ag_virtual) {
194 device_printf(dev, "contiguous allocation failed\n");
198 bzero(gatt->ag_virtual, entries * sizeof(u_int32_t));
199 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
206 agp_free_gatt(struct agp_gatt *gatt)
208 contigfree(gatt->ag_virtual,
209 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
213 static int agp_max[][2] = {
224 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
227 agp_generic_attach(device_t dev)
229 struct agp_softc *sc = device_get_softc(dev);
233 * Find and map the aperture.
236 sc->as_aperture = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
237 0, ~0, 1, RF_ACTIVE);
238 if (!sc->as_aperture)
242 * Work out an upper bound for agp memory allocation. This
243 * uses a heurisitc table from the Linux driver.
245 memsize = ptoa(Maxmem) >> 20;
246 for (i = 0; i < agp_max_size; i++) {
247 if (memsize <= agp_max[i][0])
250 if (i == agp_max_size) i = agp_max_size - 1;
251 sc->as_maxmem = agp_max[i][1] << 20U;
254 * The lock is used to prevent re-entry to
255 * agp_generic_bind_memory() since that function can sleep.
257 lockinit(&sc->as_lock, PCATCH, "agplk", 0, 0);
260 * Initialise stuff for the userland device.
262 agp_devclass = devclass_find("agp");
263 TAILQ_INIT(&sc->as_memory);
266 sc->as_devnode = make_dev(&agp_cdevsw,
267 device_get_unit(dev),
277 agp_generic_detach(device_t dev)
279 struct agp_softc *sc = device_get_softc(dev);
280 bus_release_resource(dev, SYS_RES_MEMORY, AGP_APBASE, sc->as_aperture);
281 lockmgr(&sc->as_lock, LK_DRAIN, 0, curthread); /* XXX */
282 destroy_dev(sc->as_devnode);
288 * This does the enable logic for v3, with the same topology
289 * restrictions as in place for v2 -- one bus, one device on the bus.
292 agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
294 u_int32_t tstatus, mstatus;
296 int rq, sba, fw, rate, arqsz, cal;
298 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
299 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
301 /* Set RQ to the min of mode, tstatus and mstatus */
302 rq = AGP_MODE_GET_RQ(mode);
303 if (AGP_MODE_GET_RQ(tstatus) < rq)
304 rq = AGP_MODE_GET_RQ(tstatus);
305 if (AGP_MODE_GET_RQ(mstatus) < rq)
306 rq = AGP_MODE_GET_RQ(mstatus);
309 * ARQSZ - Set the value to the maximum one.
310 * Don't allow the mode register to override values.
312 arqsz = AGP_MODE_GET_ARQSZ(mode);
313 if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
314 rq = AGP_MODE_GET_ARQSZ(tstatus);
315 if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
316 rq = AGP_MODE_GET_ARQSZ(mstatus);
318 /* Calibration cycle - don't allow override by mode register */
319 cal = AGP_MODE_GET_CAL(tstatus);
320 if (AGP_MODE_GET_CAL(mstatus) < cal)
321 cal = AGP_MODE_GET_CAL(mstatus);
323 /* SBA must be supported for AGP v3. */
326 /* Set FW if all three support it. */
327 fw = (AGP_MODE_GET_FW(tstatus)
328 & AGP_MODE_GET_FW(mstatus)
329 & AGP_MODE_GET_FW(mode));
331 /* Figure out the max rate */
332 rate = (AGP_MODE_GET_RATE(tstatus)
333 & AGP_MODE_GET_RATE(mstatus)
334 & AGP_MODE_GET_RATE(mode));
335 if (rate & AGP_MODE_V3_RATE_8x)
336 rate = AGP_MODE_V3_RATE_8x;
338 rate = AGP_MODE_V3_RATE_4x;
340 device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
342 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
344 /* Construct the new mode word and tell the hardware */
345 command = AGP_MODE_SET_RQ(0, rq);
346 command = AGP_MODE_SET_ARQSZ(command, arqsz);
347 command = AGP_MODE_SET_CAL(command, cal);
348 command = AGP_MODE_SET_SBA(command, sba);
349 command = AGP_MODE_SET_FW(command, fw);
350 command = AGP_MODE_SET_RATE(command, rate);
351 command = AGP_MODE_SET_AGP(command, 1);
352 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
353 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
359 agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
361 u_int32_t tstatus, mstatus;
363 int rq, sba, fw, rate;
365 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
366 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
368 /* Set RQ to the min of mode, tstatus and mstatus */
369 rq = AGP_MODE_GET_RQ(mode);
370 if (AGP_MODE_GET_RQ(tstatus) < rq)
371 rq = AGP_MODE_GET_RQ(tstatus);
372 if (AGP_MODE_GET_RQ(mstatus) < rq)
373 rq = AGP_MODE_GET_RQ(mstatus);
375 /* Set SBA if all three can deal with SBA */
376 sba = (AGP_MODE_GET_SBA(tstatus)
377 & AGP_MODE_GET_SBA(mstatus)
378 & AGP_MODE_GET_SBA(mode));
381 fw = (AGP_MODE_GET_FW(tstatus)
382 & AGP_MODE_GET_FW(mstatus)
383 & AGP_MODE_GET_FW(mode));
385 /* Figure out the max rate */
386 rate = (AGP_MODE_GET_RATE(tstatus)
387 & AGP_MODE_GET_RATE(mstatus)
388 & AGP_MODE_GET_RATE(mode));
389 if (rate & AGP_MODE_V2_RATE_4x)
390 rate = AGP_MODE_V2_RATE_4x;
391 else if (rate & AGP_MODE_V2_RATE_2x)
392 rate = AGP_MODE_V2_RATE_2x;
394 rate = AGP_MODE_V2_RATE_1x;
396 device_printf(dev, "Setting AGP v2 mode %d\n", rate);
398 /* Construct the new mode word and tell the hardware */
399 command = AGP_MODE_SET_RQ(0, rq);
400 command = AGP_MODE_SET_SBA(command, sba);
401 command = AGP_MODE_SET_FW(command, fw);
402 command = AGP_MODE_SET_RATE(command, rate);
403 command = AGP_MODE_SET_AGP(command, 1);
404 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
405 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
411 agp_generic_enable(device_t dev, u_int32_t mode)
413 device_t mdev = agp_find_display();
414 u_int32_t tstatus, mstatus;
417 AGP_DPF("can't find display\n");
421 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
422 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
425 * Check display and bridge for AGP v3 support. AGP v3 allows
426 * more variety in topology than v2, e.g. multiple AGP devices
427 * attached to one bridge, or multiple AGP bridges in one
428 * system. This doesn't attempt to address those situations,
429 * but should work fine for a classic single AGP slot system
432 if (AGP_MODE_GET_MODE_3(tstatus) && AGP_MODE_GET_MODE_3(mstatus))
433 return (agp_v3_enable(dev, mdev, mode));
435 return (agp_v2_enable(dev, mdev, mode));
439 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
441 struct agp_softc *sc = device_get_softc(dev);
442 struct agp_memory *mem;
444 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
447 if (sc->as_allocated + size > sc->as_maxmem)
451 printf("agp_generic_alloc_memory: unsupported type %d\n",
456 mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
457 mem->am_id = sc->as_nextid++;
460 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
461 mem->am_physical = 0;
463 mem->am_is_bound = 0;
464 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
465 sc->as_allocated += size;
471 agp_generic_free_memory(device_t dev, struct agp_memory *mem)
473 struct agp_softc *sc = device_get_softc(dev);
475 if (mem->am_is_bound)
478 sc->as_allocated -= mem->am_size;
479 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
480 vm_object_deallocate(mem->am_obj);
486 agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
489 struct agp_softc *sc = device_get_softc(dev);
494 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curthread); /* XXX */
496 if (mem->am_is_bound) {
497 device_printf(dev, "memory already bound\n");
502 || (offset & (AGP_PAGE_SIZE - 1)) != 0
503 || offset + mem->am_size > AGP_GET_APERTURE(dev)) {
504 device_printf(dev, "binding memory at bad offset %#x\n",
510 * Bind the individual pages and flush the chipset's
513 * XXX Presumably, this needs to be the pci address on alpha
514 * (i.e. use alpha_XXX_dmamap()). I don't have access to any
515 * alpha AGP hardware to check.
517 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
519 * Find a page from the object and wire it
520 * down. This page will be mapped using one or more
521 * entries in the GATT (assuming that PAGE_SIZE >=
522 * AGP_PAGE_SIZE. If this is the first call to bind,
523 * the pages will be allocated and zeroed.
525 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
526 VM_ALLOC_NORMAL | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
527 if ((m->flags & PG_ZERO) == 0)
528 vm_page_zero_fill(m);
529 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
533 * Install entries in the GATT, making sure that if
534 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
535 * aligned to PAGE_SIZE, we don't modify too many GATT
538 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
539 j += AGP_PAGE_SIZE) {
540 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
541 AGP_DPF("binding offset %#x to pa %#x\n",
543 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
546 * Bail out. Reverse all the mappings
547 * and unwire the pages.
550 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
551 AGP_UNBIND_PAGE(dev, offset + k);
552 for (k = 0; k <= i; k += PAGE_SIZE) {
553 m = vm_page_lookup(mem->am_obj,
555 vm_page_unwire(m, 0);
557 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */
565 * Flush the cpu cache since we are providing a new mapping
571 * Make sure the chipset gets the new mappings.
575 mem->am_offset = offset;
576 mem->am_is_bound = 1;
578 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */
584 agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
586 struct agp_softc *sc = device_get_softc(dev);
590 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curthread); /* XXX */
592 if (!mem->am_is_bound) {
593 device_printf(dev, "memory is not bound\n");
599 * Unbind the individual pages and flush the chipset's
600 * TLB. Unwire the pages so they can be swapped.
602 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
603 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
604 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
605 m = vm_page_lookup(mem->am_obj, atop(i));
606 vm_page_unwire(m, 0);
613 mem->am_is_bound = 0;
615 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */
620 /* Helper functions for implementing user/kernel api */
623 agp_acquire_helper(device_t dev, enum agp_acquire_state state)
625 struct agp_softc *sc = device_get_softc(dev);
627 if (sc->as_state != AGP_ACQUIRE_FREE)
629 sc->as_state = state;
635 agp_release_helper(device_t dev, enum agp_acquire_state state)
637 struct agp_softc *sc = device_get_softc(dev);
639 if (sc->as_state == AGP_ACQUIRE_FREE)
642 if (sc->as_state != state)
645 sc->as_state = AGP_ACQUIRE_FREE;
649 static struct agp_memory *
650 agp_find_memory(device_t dev, int id)
652 struct agp_softc *sc = device_get_softc(dev);
653 struct agp_memory *mem;
655 AGP_DPF("searching for memory block %d\n", id);
656 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
657 AGP_DPF("considering memory block %d\n", mem->am_id);
658 if (mem->am_id == id)
664 /* Implementation of the userland ioctl api */
667 agp_info_user(device_t dev, agp_info *info)
669 struct agp_softc *sc = device_get_softc(dev);
671 bzero(info, sizeof *info);
672 info->bridge_id = pci_get_devid(dev);
674 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
675 info->aper_base = rman_get_start(sc->as_aperture);
676 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
677 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
678 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
684 agp_setup_user(device_t dev, agp_setup *setup)
686 return AGP_ENABLE(dev, setup->agp_mode);
690 agp_allocate_user(device_t dev, agp_allocate *alloc)
692 struct agp_memory *mem;
694 mem = AGP_ALLOC_MEMORY(dev,
696 alloc->pg_count << AGP_PAGE_SHIFT);
698 alloc->key = mem->am_id;
699 alloc->physical = mem->am_physical;
707 agp_deallocate_user(device_t dev, int id)
709 struct agp_memory *mem = agp_find_memory(dev, id);;
712 AGP_FREE_MEMORY(dev, mem);
720 agp_bind_user(device_t dev, agp_bind *bind)
722 struct agp_memory *mem = agp_find_memory(dev, bind->key);
727 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
731 agp_unbind_user(device_t dev, agp_unbind *unbind)
733 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
738 return AGP_UNBIND_MEMORY(dev, mem);
742 agp_open(dev_t kdev, int oflags, int devtype, struct thread *td)
744 device_t dev = KDEV2DEV(kdev);
745 struct agp_softc *sc = device_get_softc(dev);
747 if (!sc->as_isopen) {
756 agp_close(dev_t kdev, int fflag, int devtype, struct thread *td)
758 device_t dev = KDEV2DEV(kdev);
759 struct agp_softc *sc = device_get_softc(dev);
760 struct agp_memory *mem;
763 * Clear the GATT and force release on last close
765 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
766 if (mem->am_is_bound)
767 AGP_UNBIND_MEMORY(dev, mem);
768 AGP_FREE_MEMORY(dev, mem);
770 if (sc->as_state == AGP_ACQUIRE_USER)
771 agp_release_helper(dev, AGP_ACQUIRE_USER);
779 agp_ioctl(dev_t kdev, u_long cmd, caddr_t data, int fflag, struct thread *td)
781 device_t dev = KDEV2DEV(kdev);
785 return agp_info_user(dev, (agp_info *) data);
788 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
791 return agp_release_helper(dev, AGP_ACQUIRE_USER);
794 return agp_setup_user(dev, (agp_setup *)data);
796 case AGPIOC_ALLOCATE:
797 return agp_allocate_user(dev, (agp_allocate *)data);
799 case AGPIOC_DEALLOCATE:
800 return agp_deallocate_user(dev, *(int *) data);
803 return agp_bind_user(dev, (agp_bind *)data);
806 return agp_unbind_user(dev, (agp_unbind *)data);
814 agp_mmap(dev_t kdev, vm_offset_t offset, int prot)
816 device_t dev = KDEV2DEV(kdev);
817 struct agp_softc *sc = device_get_softc(dev);
819 if (offset > AGP_GET_APERTURE(dev))
821 return atop(rman_get_start(sc->as_aperture) + offset);
824 /* Implementation of the kernel api */
831 return devclass_get_device(agp_devclass, 0);
834 enum agp_acquire_state
835 agp_state(device_t dev)
837 struct agp_softc *sc = device_get_softc(dev);
842 agp_get_info(device_t dev, struct agp_info *info)
844 struct agp_softc *sc = device_get_softc(dev);
847 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
848 info->ai_aperture_base = rman_get_start(sc->as_aperture);
849 info->ai_aperture_size = (rman_get_end(sc->as_aperture)
850 - rman_get_start(sc->as_aperture)) + 1;
851 info->ai_aperture_va = (vm_offset_t) rman_get_virtual(sc->as_aperture);
852 info->ai_memory_allowed = sc->as_maxmem;
853 info->ai_memory_used = sc->as_allocated;
857 agp_acquire(device_t dev)
859 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
863 agp_release(device_t dev)
865 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
869 agp_enable(device_t dev, u_int32_t mode)
871 return AGP_ENABLE(dev, mode);
874 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
876 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
879 void agp_free_memory(device_t dev, void *handle)
881 struct agp_memory *mem = (struct agp_memory *) handle;
882 AGP_FREE_MEMORY(dev, mem);
885 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
887 struct agp_memory *mem = (struct agp_memory *) handle;
888 return AGP_BIND_MEMORY(dev, mem, offset);
891 int agp_unbind_memory(device_t dev, void *handle)
893 struct agp_memory *mem = (struct agp_memory *) handle;
894 return AGP_UNBIND_MEMORY(dev, mem);
897 void agp_memory_info(device_t dev, void *handle, struct
900 struct agp_memory *mem = (struct agp_memory *) handle;
902 mi->ami_size = mem->am_size;
903 mi->ami_physical = mem->am_physical;
904 mi->ami_offset = mem->am_offset;
905 mi->ami_is_bound = mem->am_is_bound;