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 $
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/device.h>
33 #include <sys/malloc.h>
34 #include <sys/kernel.h>
36 #include <sys/agpio.h>
41 #include <bus/pci/pcivar.h>
42 #include <bus/pci/pcireg.h>
48 #include <vm/vm_object.h>
49 #include <vm/vm_page.h>
50 #include <vm/vm_pageout.h>
53 #include <machine/md_var.h>
55 MODULE_VERSION(agp, 1);
57 MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
59 static d_open_t agp_open;
60 static d_close_t agp_close;
61 static d_ioctl_t agp_ioctl;
62 static d_mmap_t agp_mmap;
64 static struct dev_ops agp_ops = {
72 static devclass_t agp_devclass;
73 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
75 /* Helper functions for implementing chipset mini drivers. */
80 #if defined(__i386__) || defined(__x86_64__)
86 agp_find_caps(device_t dev)
90 if (pci_find_extcap(dev, PCIY_AGP, &capreg) != 0)
96 * Find an AGP display device (if any).
99 agp_find_display(void)
101 devclass_t pci = devclass_find("pci");
102 device_t bus, dev = 0;
104 int busnum, numkids, i;
106 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
107 bus = devclass_get_device(pci, busnum);
110 device_get_children(bus, &kids, &numkids);
111 for (i = 0; i < numkids; i++) {
113 if (pci_get_class(dev) == PCIC_DISPLAY
114 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
115 if (agp_find_caps(dev)) {
128 agp_alloc_gatt(device_t dev)
130 u_int32_t apsize = AGP_GET_APERTURE(dev);
131 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
132 struct agp_gatt *gatt;
136 "allocating GATT for aperture of size %dM\n",
137 apsize / (1024*1024));
140 device_printf(dev, "bad aperture size\n");
144 gatt = kmalloc(sizeof(struct agp_gatt), M_AGP, M_INTWAIT);
145 gatt->ag_entries = entries;
146 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP,
147 M_WAITOK|M_ZERO, 0, ~0, PAGE_SIZE, 0);
148 if (!gatt->ag_virtual) {
150 device_printf(dev, "contiguous allocation failed\n");
154 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
161 agp_free_gatt(struct agp_gatt *gatt)
163 contigfree(gatt->ag_virtual,
164 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
168 static u_int agp_max[][2] = {
179 #define agp_max_size NELEM(agp_max)
182 * Sets the PCI resource which represents the AGP aperture.
184 * If not called, the default AGP aperture resource of AGP_APBASE will
185 * be used. Must be called before agp_generic_attach().
188 agp_set_aperture_resource(device_t dev, int rid)
190 struct agp_softc *sc = device_get_softc(dev);
192 sc->as_aperture_rid = rid;
196 agp_generic_attach(device_t dev)
198 struct agp_softc *sc = device_get_softc(dev);
203 * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
204 * because the kernel doesn't need to map it.
206 if (sc->as_aperture_rid == 0)
207 sc->as_aperture_rid = AGP_APBASE;
209 sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
210 &sc->as_aperture_rid, RF_SHAREABLE);
211 if (!sc->as_aperture)
215 * Work out an upper bound for agp memory allocation. This
216 * uses a heurisitc table from the Linux driver.
218 memsize = ptoa(Maxmem) >> 20;
219 for (i = 0; i < agp_max_size; i++) {
220 if (memsize <= agp_max[i][0])
223 if (i == agp_max_size) i = agp_max_size - 1;
224 sc->as_maxmem = agp_max[i][1] << 20U;
227 * The lock is used to prevent re-entry to
228 * agp_generic_bind_memory() since that function can sleep.
230 lockinit(&sc->as_lock, "agplk", 0, 0);
233 * Initialise stuff for the userland device.
235 agp_devclass = devclass_find("agp");
236 TAILQ_INIT(&sc->as_memory);
239 make_dev(&agp_ops, device_get_unit(dev), UID_ROOT, GID_WHEEL,
246 agp_free_cdev(device_t dev)
248 dev_ops_remove_minor(&agp_ops, device_get_unit(dev));
252 agp_free_res(device_t dev)
254 struct agp_softc *sc = device_get_softc(dev);
256 bus_release_resource(dev, SYS_RES_MEMORY, sc->as_aperture_rid,
262 agp_generic_detach(device_t dev)
270 * Default AGP aperture size detection which simply returns the size of
271 * the aperture's PCI resource.
274 agp_generic_get_aperture(device_t dev)
276 struct agp_softc *sc = device_get_softc(dev);
278 return rman_get_size(sc->as_aperture);
282 * Default AGP aperture size setting function, which simply doesn't allow
283 * changes to resource size.
286 agp_generic_set_aperture(device_t dev, u_int32_t aperture)
288 u_int32_t current_aperture;
290 current_aperture = AGP_GET_APERTURE(dev);
291 if (current_aperture != aperture)
298 * This does the enable logic for v3, with the same topology
299 * restrictions as in place for v2 -- one bus, one device on the bus.
302 agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
304 u_int32_t tstatus, mstatus;
306 int rq, sba, fw, rate, arqsz, cal;
308 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
309 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
311 /* Set RQ to the min of mode, tstatus and mstatus */
312 rq = AGP_MODE_GET_RQ(mode);
313 if (AGP_MODE_GET_RQ(tstatus) < rq)
314 rq = AGP_MODE_GET_RQ(tstatus);
315 if (AGP_MODE_GET_RQ(mstatus) < rq)
316 rq = AGP_MODE_GET_RQ(mstatus);
319 * ARQSZ - Set the value to the maximum one.
320 * Don't allow the mode register to override values.
322 arqsz = AGP_MODE_GET_ARQSZ(mode);
323 if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
324 rq = AGP_MODE_GET_ARQSZ(tstatus);
325 if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
326 rq = AGP_MODE_GET_ARQSZ(mstatus);
328 /* Calibration cycle - don't allow override by mode register */
329 cal = AGP_MODE_GET_CAL(tstatus);
330 if (AGP_MODE_GET_CAL(mstatus) < cal)
331 cal = AGP_MODE_GET_CAL(mstatus);
333 /* SBA must be supported for AGP v3. */
336 /* Set FW if all three support it. */
337 fw = (AGP_MODE_GET_FW(tstatus)
338 & AGP_MODE_GET_FW(mstatus)
339 & AGP_MODE_GET_FW(mode));
341 /* Figure out the max rate */
342 rate = (AGP_MODE_GET_RATE(tstatus)
343 & AGP_MODE_GET_RATE(mstatus)
344 & AGP_MODE_GET_RATE(mode));
345 if (rate & AGP_MODE_V3_RATE_8x)
346 rate = AGP_MODE_V3_RATE_8x;
348 rate = AGP_MODE_V3_RATE_4x;
350 device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
352 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
354 /* Construct the new mode word and tell the hardware */
356 command = AGP_MODE_SET_RQ(0, rq);
357 command = AGP_MODE_SET_ARQSZ(command, arqsz);
358 command = AGP_MODE_SET_CAL(command, cal);
359 command = AGP_MODE_SET_SBA(command, sba);
360 command = AGP_MODE_SET_FW(command, fw);
361 command = AGP_MODE_SET_RATE(command, rate);
362 command = AGP_MODE_SET_MODE_3(command, 1);
363 command = AGP_MODE_SET_AGP(command, 1);
364 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
365 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
371 agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
373 u_int32_t tstatus, mstatus;
375 int rq, sba, fw, rate;
377 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
378 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
380 /* Set RQ to the min of mode, tstatus and mstatus */
381 rq = AGP_MODE_GET_RQ(mode);
382 if (AGP_MODE_GET_RQ(tstatus) < rq)
383 rq = AGP_MODE_GET_RQ(tstatus);
384 if (AGP_MODE_GET_RQ(mstatus) < rq)
385 rq = AGP_MODE_GET_RQ(mstatus);
387 /* Set SBA if all three can deal with SBA */
388 sba = (AGP_MODE_GET_SBA(tstatus)
389 & AGP_MODE_GET_SBA(mstatus)
390 & AGP_MODE_GET_SBA(mode));
393 fw = (AGP_MODE_GET_FW(tstatus)
394 & AGP_MODE_GET_FW(mstatus)
395 & AGP_MODE_GET_FW(mode));
397 /* Figure out the max rate */
398 rate = (AGP_MODE_GET_RATE(tstatus)
399 & AGP_MODE_GET_RATE(mstatus)
400 & AGP_MODE_GET_RATE(mode));
401 if (rate & AGP_MODE_V2_RATE_4x)
402 rate = AGP_MODE_V2_RATE_4x;
403 else if (rate & AGP_MODE_V2_RATE_2x)
404 rate = AGP_MODE_V2_RATE_2x;
406 rate = AGP_MODE_V2_RATE_1x;
408 device_printf(dev, "Setting AGP v2 mode %d\n", rate);
410 /* Construct the new mode word and tell the hardware */
412 command = AGP_MODE_SET_RQ(0, rq);
413 command = AGP_MODE_SET_SBA(command, sba);
414 command = AGP_MODE_SET_FW(command, fw);
415 command = AGP_MODE_SET_RATE(command, rate);
416 command = AGP_MODE_SET_AGP(command, 1);
417 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
418 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
424 agp_generic_enable(device_t dev, u_int32_t mode)
426 device_t mdev = agp_find_display();
427 u_int32_t tstatus, mstatus;
430 AGP_DPF("can't find display\n");
434 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
435 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
438 * Check display and bridge for AGP v3 support. AGP v3 allows
439 * more variety in topology than v2, e.g. multiple AGP devices
440 * attached to one bridge, or multiple AGP bridges in one
441 * system. This doesn't attempt to address those situations,
442 * but should work fine for a classic single AGP slot system
445 if (AGP_MODE_GET_MODE_3(mode) &&
446 AGP_MODE_GET_MODE_3(tstatus) &&
447 AGP_MODE_GET_MODE_3(mstatus))
448 return (agp_v3_enable(dev, mdev, mode));
450 return (agp_v2_enable(dev, mdev, mode));
454 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
456 struct agp_softc *sc = device_get_softc(dev);
457 struct agp_memory *mem;
459 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
462 if (sc->as_allocated + size > sc->as_maxmem)
466 kprintf("agp_generic_alloc_memory: unsupported type %d\n",
471 mem = kmalloc(sizeof *mem, M_AGP, M_INTWAIT);
472 mem->am_id = sc->as_nextid++;
475 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
476 mem->am_physical = 0;
478 mem->am_is_bound = 0;
479 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
480 sc->as_allocated += size;
486 agp_generic_free_memory(device_t dev, struct agp_memory *mem)
488 struct agp_softc *sc = device_get_softc(dev);
490 if (mem->am_is_bound)
493 sc->as_allocated -= mem->am_size;
494 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
495 vm_object_deallocate(mem->am_obj);
501 agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
504 struct agp_softc *sc = device_get_softc(dev);
509 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
511 if (mem->am_is_bound) {
512 device_printf(dev, "memory already bound\n");
513 lockmgr(&sc->as_lock, LK_RELEASE);
518 || (offset & (AGP_PAGE_SIZE - 1)) != 0
519 || offset + mem->am_size > AGP_GET_APERTURE(dev)) {
520 device_printf(dev, "binding memory at bad offset %#x,%#x,%#x\n",
521 (int) offset, (int)mem->am_size,
522 (int)AGP_GET_APERTURE(dev));
523 kprintf("Check BIOS's aperature size vs X\n");
524 lockmgr(&sc->as_lock, LK_RELEASE);
529 * Bind the individual pages and flush the chipset's
532 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
534 * Find a page from the object and wire it down. This page
535 * will be mapped using one or more entries in the GATT
536 * (assuming that PAGE_SIZE >= AGP_PAGE_SIZE. If this is
537 * the first call to bind, the pages will be allocated
540 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
541 VM_ALLOC_NORMAL | VM_ALLOC_ZERO |
543 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
547 * Install entries in the GATT, making sure that if
548 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
549 * aligned to PAGE_SIZE, we don't modify too many GATT
552 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
553 j += AGP_PAGE_SIZE) {
554 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
555 AGP_DPF("binding offset %#x to pa %#x\n",
557 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
560 * Bail out. Reverse all the mappings
561 * and unwire the pages.
564 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
565 AGP_UNBIND_PAGE(dev, offset + k);
566 vm_object_hold(mem->am_obj);
567 for (k = 0; k <= i; k += PAGE_SIZE) {
568 m = vm_page_lookup_busy_wait(
569 mem->am_obj, OFF_TO_IDX(k),
571 vm_page_unwire(m, 0);
574 vm_object_drop(mem->am_obj);
575 lockmgr(&sc->as_lock, LK_RELEASE);
583 * Flush the cpu cache since we are providing a new mapping
589 * Make sure the chipset gets the new mappings.
593 mem->am_offset = offset;
594 mem->am_is_bound = 1;
596 lockmgr(&sc->as_lock, LK_RELEASE);
602 agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
604 struct agp_softc *sc = device_get_softc(dev);
608 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
610 if (!mem->am_is_bound) {
611 device_printf(dev, "memory is not bound\n");
612 lockmgr(&sc->as_lock, LK_RELEASE);
618 * Unbind the individual pages and flush the chipset's
619 * TLB. Unwire the pages so they can be swapped.
621 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
622 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
623 vm_object_hold(mem->am_obj);
624 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
625 m = vm_page_lookup_busy_wait(mem->am_obj, atop(i),
627 vm_page_unwire(m, 0);
630 vm_object_drop(mem->am_obj);
636 mem->am_is_bound = 0;
638 lockmgr(&sc->as_lock, LK_RELEASE);
643 /* Helper functions for implementing user/kernel api */
646 agp_acquire_helper(device_t dev, enum agp_acquire_state state)
648 struct agp_softc *sc = device_get_softc(dev);
650 if (sc->as_state != AGP_ACQUIRE_FREE)
652 sc->as_state = state;
658 agp_release_helper(device_t dev, enum agp_acquire_state state)
660 struct agp_softc *sc = device_get_softc(dev);
662 if (sc->as_state == AGP_ACQUIRE_FREE)
665 if (sc->as_state != state)
668 sc->as_state = AGP_ACQUIRE_FREE;
672 static struct agp_memory *
673 agp_find_memory(device_t dev, int id)
675 struct agp_softc *sc = device_get_softc(dev);
676 struct agp_memory *mem;
678 AGP_DPF("searching for memory block %d\n", id);
679 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
680 AGP_DPF("considering memory block %d\n", mem->am_id);
681 if (mem->am_id == id)
687 /* Implementation of the userland ioctl api */
690 agp_info_user(device_t dev, agp_info *info)
692 struct agp_softc *sc = device_get_softc(dev);
694 bzero(info, sizeof *info);
695 info->bridge_id = pci_get_devid(dev);
697 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
698 info->aper_base = rman_get_start(sc->as_aperture);
699 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
700 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
701 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
707 agp_setup_user(device_t dev, agp_setup *setup)
709 return AGP_ENABLE(dev, setup->agp_mode);
713 agp_allocate_user(device_t dev, agp_allocate *alloc)
715 struct agp_memory *mem;
717 mem = AGP_ALLOC_MEMORY(dev,
719 alloc->pg_count << AGP_PAGE_SHIFT);
721 alloc->key = mem->am_id;
722 alloc->physical = mem->am_physical;
730 agp_deallocate_user(device_t dev, int id)
732 struct agp_memory *mem = agp_find_memory(dev, id);
735 AGP_FREE_MEMORY(dev, mem);
743 agp_bind_user(device_t dev, agp_bind *bind)
745 struct agp_memory *mem = agp_find_memory(dev, bind->key);
750 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
754 agp_unbind_user(device_t dev, agp_unbind *unbind)
756 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
761 return AGP_UNBIND_MEMORY(dev, mem);
765 agp_open(struct dev_open_args *ap)
767 cdev_t kdev = ap->a_head.a_dev;
768 device_t dev = KDEV2DEV(kdev);
769 struct agp_softc *sc = device_get_softc(dev);
771 if (!sc->as_isopen) {
780 agp_close(struct dev_close_args *ap)
782 cdev_t kdev = ap->a_head.a_dev;
783 device_t dev = KDEV2DEV(kdev);
784 struct agp_softc *sc = device_get_softc(dev);
785 struct agp_memory *mem;
788 * Clear the GATT and force release on last close
790 while ((mem = TAILQ_FIRST(&sc->as_memory)) != NULL) {
791 if (mem->am_is_bound)
792 AGP_UNBIND_MEMORY(dev, mem);
793 AGP_FREE_MEMORY(dev, mem);
795 if (sc->as_state == AGP_ACQUIRE_USER)
796 agp_release_helper(dev, AGP_ACQUIRE_USER);
806 agp_ioctl(struct dev_ioctl_args *ap)
808 cdev_t kdev = ap->a_head.a_dev;
809 device_t dev = KDEV2DEV(kdev);
813 return agp_info_user(dev, (agp_info *)ap->a_data);
816 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
819 return agp_release_helper(dev, AGP_ACQUIRE_USER);
822 return agp_setup_user(dev, (agp_setup *)ap->a_data);
824 case AGPIOC_ALLOCATE:
825 return agp_allocate_user(dev, (agp_allocate *)ap->a_data);
827 case AGPIOC_DEALLOCATE:
828 return agp_deallocate_user(dev, *(int *)ap->a_data);
831 return agp_bind_user(dev, (agp_bind *)ap->a_data);
834 return agp_unbind_user(dev, (agp_unbind *)ap->a_data);
842 agp_mmap(struct dev_mmap_args *ap)
844 cdev_t kdev = ap->a_head.a_dev;
845 device_t dev = KDEV2DEV(kdev);
846 struct agp_softc *sc = device_get_softc(dev);
848 if (ap->a_offset > AGP_GET_APERTURE(dev))
850 ap->a_result = atop(rman_get_start(sc->as_aperture) + ap->a_offset);
854 /* Implementation of the kernel api */
857 agp_find_device(void)
859 device_t *children, child;
864 if (devclass_get_devices(agp_devclass, &children, &count) != 0)
867 for (i = 0; i < count; i++) {
868 if (device_is_attached(children[i])) {
873 kfree(children, M_TEMP);
877 enum agp_acquire_state
878 agp_state(device_t dev)
880 struct agp_softc *sc = device_get_softc(dev);
885 agp_get_info(device_t dev, struct agp_info *info)
887 struct agp_softc *sc = device_get_softc(dev);
890 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
891 info->ai_aperture_base = rman_get_start(sc->as_aperture);
892 info->ai_aperture_size = rman_get_size(sc->as_aperture);
893 info->ai_memory_allowed = sc->as_maxmem;
894 info->ai_memory_used = sc->as_allocated;
898 agp_acquire(device_t dev)
900 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
904 agp_release(device_t dev)
906 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
910 agp_enable(device_t dev, u_int32_t mode)
912 return AGP_ENABLE(dev, mode);
915 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
917 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
920 void agp_free_memory(device_t dev, void *handle)
922 struct agp_memory *mem = (struct agp_memory *) handle;
923 AGP_FREE_MEMORY(dev, mem);
926 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
928 struct agp_memory *mem = (struct agp_memory *) handle;
929 return AGP_BIND_MEMORY(dev, mem, offset);
932 int agp_unbind_memory(device_t dev, void *handle)
934 struct agp_memory *mem = (struct agp_memory *) handle;
935 return AGP_UNBIND_MEMORY(dev, mem);
938 void agp_memory_info(device_t dev, void *handle, struct
941 struct agp_memory *mem = (struct agp_memory *) handle;
943 mi->ami_size = mem->am_size;
944 mi->ami_physical = mem->am_physical;
945 mi->ami_offset = mem->am_offset;
946 mi->ami_is_bound = mem->am_is_bound;