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 $
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/device.h>
36 #include <sys/malloc.h>
37 #include <sys/kernel.h>
39 #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>
58 MODULE_VERSION(agp, 1);
60 MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
62 #define CDEV_MAJOR 148
64 static d_open_t agp_open;
65 static d_close_t agp_close;
66 static d_ioctl_t agp_ioctl;
67 static d_mmap_t agp_mmap;
69 static struct dev_ops agp_ops = {
70 { "agp", CDEV_MAJOR, D_TTY },
77 static devclass_t agp_devclass;
78 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
80 /* Helper functions for implementing chipset mini drivers. */
85 #if defined(__i386__) || defined(__amd64__)
91 agp_find_caps(device_t dev)
95 if (pci_find_extcap(dev, PCIY_AGP, &capreg) != 0)
101 * Find an AGP display device (if any).
104 agp_find_display(void)
106 devclass_t pci = devclass_find("pci");
107 device_t bus, dev = 0;
109 int busnum, numkids, i;
111 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
112 bus = devclass_get_device(pci, busnum);
115 device_get_children(bus, &kids, &numkids);
116 for (i = 0; i < numkids; i++) {
118 if (pci_get_class(dev) == PCIC_DISPLAY
119 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
120 if (agp_find_caps(dev)) {
133 agp_alloc_gatt(device_t dev)
135 u_int32_t apsize = AGP_GET_APERTURE(dev);
136 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
137 struct agp_gatt *gatt;
141 "allocating GATT for aperture of size %dM\n",
142 apsize / (1024*1024));
145 device_printf(dev, "bad aperture size\n");
149 gatt = kmalloc(sizeof(struct agp_gatt), M_AGP, M_INTWAIT);
150 gatt->ag_entries = entries;
151 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP,
152 M_WAITOK|M_ZERO, 0, ~0, PAGE_SIZE, 0);
153 if (!gatt->ag_virtual) {
155 device_printf(dev, "contiguous allocation failed\n");
159 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
166 agp_free_gatt(struct agp_gatt *gatt)
168 contigfree(gatt->ag_virtual,
169 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
173 static u_int agp_max[][2] = {
184 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
187 * Sets the PCI resource which represents the AGP aperture.
189 * If not called, the default AGP aperture resource of AGP_APBASE will
190 * be used. Must be called before agp_generic_attach().
193 agp_set_aperture_resource(device_t dev, int rid)
195 struct agp_softc *sc = device_get_softc(dev);
197 sc->as_aperture_rid = rid;
201 agp_generic_attach(device_t dev)
203 struct agp_softc *sc = device_get_softc(dev);
208 * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
209 * because the kernel doesn't need to map it.
211 if (sc->as_aperture_rid == 0)
212 sc->as_aperture_rid = AGP_APBASE;
214 sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
215 &sc->as_aperture_rid, RF_SHAREABLE);
216 if (!sc->as_aperture)
220 * Work out an upper bound for agp memory allocation. This
221 * uses a heurisitc table from the Linux driver.
223 memsize = ptoa(Maxmem) >> 20;
224 for (i = 0; i < agp_max_size; i++) {
225 if (memsize <= agp_max[i][0])
228 if (i == agp_max_size) i = agp_max_size - 1;
229 sc->as_maxmem = agp_max[i][1] << 20U;
232 * The lock is used to prevent re-entry to
233 * agp_generic_bind_memory() since that function can sleep.
235 lockinit(&sc->as_lock, "agplk", 0, 0);
238 * Initialise stuff for the userland device.
240 agp_devclass = devclass_find("agp");
241 TAILQ_INIT(&sc->as_memory);
244 make_dev(&agp_ops, device_get_unit(dev), UID_ROOT, GID_WHEEL,
251 agp_free_cdev(device_t dev)
253 dev_ops_remove_minor(&agp_ops, device_get_unit(dev));
257 agp_free_res(device_t dev)
259 struct agp_softc *sc = device_get_softc(dev);
261 bus_release_resource(dev, SYS_RES_MEMORY, sc->as_aperture_rid,
267 agp_generic_detach(device_t dev)
275 * Default AGP aperture size detection which simply returns the size of
276 * the aperture's PCI resource.
279 agp_generic_get_aperture(device_t dev)
281 struct agp_softc *sc = device_get_softc(dev);
283 return rman_get_size(sc->as_aperture);
287 * Default AGP aperture size setting function, which simply doesn't allow
288 * changes to resource size.
291 agp_generic_set_aperture(device_t dev, u_int32_t aperture)
293 u_int32_t current_aperture;
295 current_aperture = AGP_GET_APERTURE(dev);
296 if (current_aperture != aperture)
303 * This does the enable logic for v3, with the same topology
304 * restrictions as in place for v2 -- one bus, one device on the bus.
307 agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
309 u_int32_t tstatus, mstatus;
311 int rq, sba, fw, rate, arqsz, cal;
313 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
314 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
316 /* Set RQ to the min of mode, tstatus and mstatus */
317 rq = AGP_MODE_GET_RQ(mode);
318 if (AGP_MODE_GET_RQ(tstatus) < rq)
319 rq = AGP_MODE_GET_RQ(tstatus);
320 if (AGP_MODE_GET_RQ(mstatus) < rq)
321 rq = AGP_MODE_GET_RQ(mstatus);
324 * ARQSZ - Set the value to the maximum one.
325 * Don't allow the mode register to override values.
327 arqsz = AGP_MODE_GET_ARQSZ(mode);
328 if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
329 rq = AGP_MODE_GET_ARQSZ(tstatus);
330 if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
331 rq = AGP_MODE_GET_ARQSZ(mstatus);
333 /* Calibration cycle - don't allow override by mode register */
334 cal = AGP_MODE_GET_CAL(tstatus);
335 if (AGP_MODE_GET_CAL(mstatus) < cal)
336 cal = AGP_MODE_GET_CAL(mstatus);
338 /* SBA must be supported for AGP v3. */
341 /* Set FW if all three support it. */
342 fw = (AGP_MODE_GET_FW(tstatus)
343 & AGP_MODE_GET_FW(mstatus)
344 & AGP_MODE_GET_FW(mode));
346 /* Figure out the max rate */
347 rate = (AGP_MODE_GET_RATE(tstatus)
348 & AGP_MODE_GET_RATE(mstatus)
349 & AGP_MODE_GET_RATE(mode));
350 if (rate & AGP_MODE_V3_RATE_8x)
351 rate = AGP_MODE_V3_RATE_8x;
353 rate = AGP_MODE_V3_RATE_4x;
355 device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
357 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
359 /* Construct the new mode word and tell the hardware */
361 command = AGP_MODE_SET_RQ(0, rq);
362 command = AGP_MODE_SET_ARQSZ(command, arqsz);
363 command = AGP_MODE_SET_CAL(command, cal);
364 command = AGP_MODE_SET_SBA(command, sba);
365 command = AGP_MODE_SET_FW(command, fw);
366 command = AGP_MODE_SET_RATE(command, rate);
367 command = AGP_MODE_SET_MODE_3(command, 1);
368 command = AGP_MODE_SET_AGP(command, 1);
369 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
370 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
376 agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
378 u_int32_t tstatus, mstatus;
380 int rq, sba, fw, rate;
382 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
383 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
385 /* Set RQ to the min of mode, tstatus and mstatus */
386 rq = AGP_MODE_GET_RQ(mode);
387 if (AGP_MODE_GET_RQ(tstatus) < rq)
388 rq = AGP_MODE_GET_RQ(tstatus);
389 if (AGP_MODE_GET_RQ(mstatus) < rq)
390 rq = AGP_MODE_GET_RQ(mstatus);
392 /* Set SBA if all three can deal with SBA */
393 sba = (AGP_MODE_GET_SBA(tstatus)
394 & AGP_MODE_GET_SBA(mstatus)
395 & AGP_MODE_GET_SBA(mode));
398 fw = (AGP_MODE_GET_FW(tstatus)
399 & AGP_MODE_GET_FW(mstatus)
400 & AGP_MODE_GET_FW(mode));
402 /* Figure out the max rate */
403 rate = (AGP_MODE_GET_RATE(tstatus)
404 & AGP_MODE_GET_RATE(mstatus)
405 & AGP_MODE_GET_RATE(mode));
406 if (rate & AGP_MODE_V2_RATE_4x)
407 rate = AGP_MODE_V2_RATE_4x;
408 else if (rate & AGP_MODE_V2_RATE_2x)
409 rate = AGP_MODE_V2_RATE_2x;
411 rate = AGP_MODE_V2_RATE_1x;
413 device_printf(dev, "Setting AGP v2 mode %d\n", rate);
415 /* Construct the new mode word and tell the hardware */
417 command = AGP_MODE_SET_RQ(0, rq);
418 command = AGP_MODE_SET_SBA(command, sba);
419 command = AGP_MODE_SET_FW(command, fw);
420 command = AGP_MODE_SET_RATE(command, rate);
421 command = AGP_MODE_SET_AGP(command, 1);
422 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
423 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
429 agp_generic_enable(device_t dev, u_int32_t mode)
431 device_t mdev = agp_find_display();
432 u_int32_t tstatus, mstatus;
435 AGP_DPF("can't find display\n");
439 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
440 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
443 * Check display and bridge for AGP v3 support. AGP v3 allows
444 * more variety in topology than v2, e.g. multiple AGP devices
445 * attached to one bridge, or multiple AGP bridges in one
446 * system. This doesn't attempt to address those situations,
447 * but should work fine for a classic single AGP slot system
450 if (AGP_MODE_GET_MODE_3(mode) &&
451 AGP_MODE_GET_MODE_3(tstatus) &&
452 AGP_MODE_GET_MODE_3(mstatus))
453 return (agp_v3_enable(dev, mdev, mode));
455 return (agp_v2_enable(dev, mdev, mode));
459 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
461 struct agp_softc *sc = device_get_softc(dev);
462 struct agp_memory *mem;
464 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
467 if (sc->as_allocated + size > sc->as_maxmem)
471 kprintf("agp_generic_alloc_memory: unsupported type %d\n",
476 mem = kmalloc(sizeof *mem, M_AGP, M_INTWAIT);
477 mem->am_id = sc->as_nextid++;
480 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
481 mem->am_physical = 0;
483 mem->am_is_bound = 0;
484 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
485 sc->as_allocated += size;
491 agp_generic_free_memory(device_t dev, struct agp_memory *mem)
493 struct agp_softc *sc = device_get_softc(dev);
495 if (mem->am_is_bound)
498 sc->as_allocated -= mem->am_size;
499 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
500 vm_object_deallocate(mem->am_obj);
506 agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
509 struct agp_softc *sc = device_get_softc(dev);
514 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
516 if (mem->am_is_bound) {
517 device_printf(dev, "memory already bound\n");
518 lockmgr(&sc->as_lock, LK_RELEASE);
523 || (offset & (AGP_PAGE_SIZE - 1)) != 0
524 || offset + mem->am_size > AGP_GET_APERTURE(dev)) {
525 device_printf(dev, "binding memory at bad offset %#x,%#x,%#x\n",
526 (int) offset, (int)mem->am_size,
527 (int)AGP_GET_APERTURE(dev));
528 kprintf("Check BIOS's aperature size vs X\n");
529 lockmgr(&sc->as_lock, LK_RELEASE);
534 * Bind the individual pages and flush the chipset's
537 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
539 * Find a page from the object and wire it
540 * down. This page will be mapped using one or more
541 * entries in the GATT (assuming that PAGE_SIZE >=
542 * AGP_PAGE_SIZE. If this is the first call to bind,
543 * the pages will be allocated and zeroed.
545 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
546 VM_ALLOC_NORMAL | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
547 if ((m->flags & PG_ZERO) == 0)
548 vm_page_zero_fill(m);
549 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
553 * Install entries in the GATT, making sure that if
554 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
555 * aligned to PAGE_SIZE, we don't modify too many GATT
558 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
559 j += AGP_PAGE_SIZE) {
560 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
561 AGP_DPF("binding offset %#x to pa %#x\n",
563 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
566 * Bail out. Reverse all the mappings
567 * and unwire the pages.
570 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
571 AGP_UNBIND_PAGE(dev, offset + k);
572 for (k = 0; k <= i; k += PAGE_SIZE) {
573 m = vm_page_lookup(mem->am_obj,
575 vm_page_unwire(m, 0);
577 lockmgr(&sc->as_lock, LK_RELEASE);
585 * Flush the cpu cache since we are providing a new mapping
591 * Make sure the chipset gets the new mappings.
595 mem->am_offset = offset;
596 mem->am_is_bound = 1;
598 lockmgr(&sc->as_lock, LK_RELEASE);
604 agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
606 struct agp_softc *sc = device_get_softc(dev);
610 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
612 if (!mem->am_is_bound) {
613 device_printf(dev, "memory is not bound\n");
614 lockmgr(&sc->as_lock, LK_RELEASE);
620 * Unbind the individual pages and flush the chipset's
621 * TLB. Unwire the pages so they can be swapped.
623 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
624 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
625 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
626 m = vm_page_lookup(mem->am_obj, atop(i));
627 vm_page_unwire(m, 0);
634 mem->am_is_bound = 0;
636 lockmgr(&sc->as_lock, LK_RELEASE);
641 /* Helper functions for implementing user/kernel api */
644 agp_acquire_helper(device_t dev, enum agp_acquire_state state)
646 struct agp_softc *sc = device_get_softc(dev);
648 if (sc->as_state != AGP_ACQUIRE_FREE)
650 sc->as_state = state;
656 agp_release_helper(device_t dev, enum agp_acquire_state state)
658 struct agp_softc *sc = device_get_softc(dev);
660 if (sc->as_state == AGP_ACQUIRE_FREE)
663 if (sc->as_state != state)
666 sc->as_state = AGP_ACQUIRE_FREE;
670 static struct agp_memory *
671 agp_find_memory(device_t dev, int id)
673 struct agp_softc *sc = device_get_softc(dev);
674 struct agp_memory *mem;
676 AGP_DPF("searching for memory block %d\n", id);
677 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
678 AGP_DPF("considering memory block %d\n", mem->am_id);
679 if (mem->am_id == id)
685 /* Implementation of the userland ioctl api */
688 agp_info_user(device_t dev, agp_info *info)
690 struct agp_softc *sc = device_get_softc(dev);
692 bzero(info, sizeof *info);
693 info->bridge_id = pci_get_devid(dev);
695 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
696 info->aper_base = rman_get_start(sc->as_aperture);
697 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
698 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
699 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
705 agp_setup_user(device_t dev, agp_setup *setup)
707 return AGP_ENABLE(dev, setup->agp_mode);
711 agp_allocate_user(device_t dev, agp_allocate *alloc)
713 struct agp_memory *mem;
715 mem = AGP_ALLOC_MEMORY(dev,
717 alloc->pg_count << AGP_PAGE_SHIFT);
719 alloc->key = mem->am_id;
720 alloc->physical = mem->am_physical;
728 agp_deallocate_user(device_t dev, int id)
730 struct agp_memory *mem = agp_find_memory(dev, id);
733 AGP_FREE_MEMORY(dev, mem);
741 agp_bind_user(device_t dev, agp_bind *bind)
743 struct agp_memory *mem = agp_find_memory(dev, bind->key);
748 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
752 agp_unbind_user(device_t dev, agp_unbind *unbind)
754 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
759 return AGP_UNBIND_MEMORY(dev, mem);
763 agp_open(struct dev_open_args *ap)
765 cdev_t kdev = ap->a_head.a_dev;
766 device_t dev = KDEV2DEV(kdev);
767 struct agp_softc *sc = device_get_softc(dev);
769 if (!sc->as_isopen) {
778 agp_close(struct dev_close_args *ap)
780 cdev_t kdev = ap->a_head.a_dev;
781 device_t dev = KDEV2DEV(kdev);
782 struct agp_softc *sc = device_get_softc(dev);
783 struct agp_memory *mem;
786 * Clear the GATT and force release on last close
788 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
789 if (mem->am_is_bound)
790 AGP_UNBIND_MEMORY(dev, mem);
791 AGP_FREE_MEMORY(dev, mem);
793 if (sc->as_state == AGP_ACQUIRE_USER)
794 agp_release_helper(dev, AGP_ACQUIRE_USER);
802 agp_ioctl(struct dev_ioctl_args *ap)
804 cdev_t kdev = ap->a_head.a_dev;
805 device_t dev = KDEV2DEV(kdev);
809 return agp_info_user(dev, (agp_info *)ap->a_data);
812 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
815 return agp_release_helper(dev, AGP_ACQUIRE_USER);
818 return agp_setup_user(dev, (agp_setup *)ap->a_data);
820 case AGPIOC_ALLOCATE:
821 return agp_allocate_user(dev, (agp_allocate *)ap->a_data);
823 case AGPIOC_DEALLOCATE:
824 return agp_deallocate_user(dev, *(int *)ap->a_data);
827 return agp_bind_user(dev, (agp_bind *)ap->a_data);
830 return agp_unbind_user(dev, (agp_unbind *)ap->a_data);
838 agp_mmap(struct dev_mmap_args *ap)
840 cdev_t kdev = ap->a_head.a_dev;
841 device_t dev = KDEV2DEV(kdev);
842 struct agp_softc *sc = device_get_softc(dev);
844 if (ap->a_offset > AGP_GET_APERTURE(dev))
846 ap->a_result = atop(rman_get_start(sc->as_aperture) + ap->a_offset);
850 /* Implementation of the kernel api */
853 agp_find_device(void)
855 device_t *children, child;
860 if (devclass_get_devices(agp_devclass, &children, &count) != 0)
863 for (i = 0; i < count; i++) {
864 if (device_is_attached(children[i])) {
869 kfree(children, M_TEMP);
873 enum agp_acquire_state
874 agp_state(device_t dev)
876 struct agp_softc *sc = device_get_softc(dev);
881 agp_get_info(device_t dev, struct agp_info *info)
883 struct agp_softc *sc = device_get_softc(dev);
886 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
887 info->ai_aperture_base = rman_get_start(sc->as_aperture);
888 info->ai_aperture_size = rman_get_size(sc->as_aperture);
889 info->ai_memory_allowed = sc->as_maxmem;
890 info->ai_memory_used = sc->as_allocated;
894 agp_acquire(device_t dev)
896 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
900 agp_release(device_t dev)
902 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
906 agp_enable(device_t dev, u_int32_t mode)
908 return AGP_ENABLE(dev, mode);
911 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
913 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
916 void agp_free_memory(device_t dev, void *handle)
918 struct agp_memory *mem = (struct agp_memory *) handle;
919 AGP_FREE_MEMORY(dev, mem);
922 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
924 struct agp_memory *mem = (struct agp_memory *) handle;
925 return AGP_BIND_MEMORY(dev, mem, offset);
928 int agp_unbind_memory(device_t dev, void *handle)
930 struct agp_memory *mem = (struct agp_memory *) handle;
931 return AGP_UNBIND_MEMORY(dev, mem);
934 void agp_memory_info(device_t dev, void *handle, struct
937 struct agp_memory *mem = (struct agp_memory *) handle;
939 mi->ami_size = mem->am_size;
940 mi->ami_physical = mem->am_physical;
941 mi->ami_offset = mem->am_offset;
942 mi->ami_is_bound = mem->am_is_bound;