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 $
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/device.h>
35 #include <sys/malloc.h>
36 #include <sys/kernel.h>
38 #include <sys/agpio.h>
43 #include <bus/pci/pcivar.h>
44 #include <bus/pci/pcireg.h>
50 #include <vm/vm_object.h>
51 #include <vm/vm_page.h>
52 #include <vm/vm_pageout.h>
55 #include <machine/md_var.h>
57 MODULE_VERSION(agp, 1);
59 MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
61 static d_open_t agp_open;
62 static d_close_t agp_close;
63 static d_ioctl_t agp_ioctl;
64 static d_mmap_t agp_mmap;
66 static struct dev_ops agp_ops = {
74 static devclass_t agp_devclass;
75 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
77 /* Helper functions for implementing chipset mini drivers. */
82 #if defined(__i386__) || defined(__x86_64__)
88 agp_find_caps(device_t dev)
92 if (pci_find_extcap(dev, PCIY_AGP, &capreg) != 0)
98 * Find an AGP display device (if any).
101 agp_find_display(void)
103 devclass_t pci = devclass_find("pci");
104 device_t bus, dev = 0;
106 int busnum, numkids, i;
108 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
109 bus = devclass_get_device(pci, busnum);
112 device_get_children(bus, &kids, &numkids);
113 for (i = 0; i < numkids; i++) {
115 if (pci_get_class(dev) == PCIC_DISPLAY
116 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
117 if (agp_find_caps(dev)) {
130 agp_alloc_gatt(device_t dev)
132 u_int32_t apsize = AGP_GET_APERTURE(dev);
133 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
134 struct agp_gatt *gatt;
138 "allocating GATT for aperture of size %dM\n",
139 apsize / (1024*1024));
142 device_printf(dev, "bad aperture size\n");
146 gatt = kmalloc(sizeof(struct agp_gatt), M_AGP, M_INTWAIT);
147 gatt->ag_entries = entries;
148 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP,
149 M_WAITOK|M_ZERO, 0, ~0, PAGE_SIZE, 0);
150 if (!gatt->ag_virtual) {
152 device_printf(dev, "contiguous allocation failed\n");
156 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
163 agp_free_gatt(struct agp_gatt *gatt)
165 contigfree(gatt->ag_virtual,
166 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
170 static u_int agp_max[][2] = {
181 #define agp_max_size NELEM(agp_max)
184 * Sets the PCI resource which represents the AGP aperture.
186 * If not called, the default AGP aperture resource of AGP_APBASE will
187 * be used. Must be called before agp_generic_attach().
190 agp_set_aperture_resource(device_t dev, int rid)
192 struct agp_softc *sc = device_get_softc(dev);
194 sc->as_aperture_rid = rid;
198 agp_generic_attach(device_t dev)
200 struct agp_softc *sc = device_get_softc(dev);
205 * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
206 * because the kernel doesn't need to map it.
208 if (sc->as_aperture_rid == 0)
209 sc->as_aperture_rid = AGP_APBASE;
211 sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
212 &sc->as_aperture_rid, RF_SHAREABLE);
213 if (!sc->as_aperture)
217 * Work out an upper bound for agp memory allocation. This
218 * uses a heurisitc table from the Linux driver.
220 memsize = ptoa(Maxmem) >> 20;
221 for (i = 0; i < agp_max_size; i++) {
222 if (memsize <= agp_max[i][0])
225 if (i == agp_max_size) i = agp_max_size - 1;
226 sc->as_maxmem = agp_max[i][1] << 20U;
229 * The lock is used to prevent re-entry to
230 * agp_generic_bind_memory() since that function can sleep.
232 lockinit(&sc->as_lock, "agplk", 0, 0);
235 * Initialise stuff for the userland device.
237 agp_devclass = devclass_find("agp");
238 TAILQ_INIT(&sc->as_memory);
241 make_dev(&agp_ops, device_get_unit(dev), UID_ROOT, GID_WHEEL,
248 agp_free_cdev(device_t dev)
250 dev_ops_remove_minor(&agp_ops, device_get_unit(dev));
254 agp_free_res(device_t dev)
256 struct agp_softc *sc = device_get_softc(dev);
258 bus_release_resource(dev, SYS_RES_MEMORY, sc->as_aperture_rid,
264 agp_generic_detach(device_t dev)
272 * Default AGP aperture size detection which simply returns the size of
273 * the aperture's PCI resource.
276 agp_generic_get_aperture(device_t dev)
278 struct agp_softc *sc = device_get_softc(dev);
280 return rman_get_size(sc->as_aperture);
284 * Default AGP aperture size setting function, which simply doesn't allow
285 * changes to resource size.
288 agp_generic_set_aperture(device_t dev, u_int32_t aperture)
290 u_int32_t current_aperture;
292 current_aperture = AGP_GET_APERTURE(dev);
293 if (current_aperture != aperture)
300 * This does the enable logic for v3, with the same topology
301 * restrictions as in place for v2 -- one bus, one device on the bus.
304 agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
306 u_int32_t tstatus, mstatus;
308 int rq, sba, fw, rate, arqsz, cal;
310 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
311 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
313 /* Set RQ to the min of mode, tstatus and mstatus */
314 rq = AGP_MODE_GET_RQ(mode);
315 if (AGP_MODE_GET_RQ(tstatus) < rq)
316 rq = AGP_MODE_GET_RQ(tstatus);
317 if (AGP_MODE_GET_RQ(mstatus) < rq)
318 rq = AGP_MODE_GET_RQ(mstatus);
321 * ARQSZ - Set the value to the maximum one.
322 * Don't allow the mode register to override values.
324 arqsz = AGP_MODE_GET_ARQSZ(mode);
325 if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
326 rq = AGP_MODE_GET_ARQSZ(tstatus);
327 if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
328 rq = AGP_MODE_GET_ARQSZ(mstatus);
330 /* Calibration cycle - don't allow override by mode register */
331 cal = AGP_MODE_GET_CAL(tstatus);
332 if (AGP_MODE_GET_CAL(mstatus) < cal)
333 cal = AGP_MODE_GET_CAL(mstatus);
335 /* SBA must be supported for AGP v3. */
338 /* Set FW if all three support it. */
339 fw = (AGP_MODE_GET_FW(tstatus)
340 & AGP_MODE_GET_FW(mstatus)
341 & AGP_MODE_GET_FW(mode));
343 /* Figure out the max rate */
344 rate = (AGP_MODE_GET_RATE(tstatus)
345 & AGP_MODE_GET_RATE(mstatus)
346 & AGP_MODE_GET_RATE(mode));
347 if (rate & AGP_MODE_V3_RATE_8x)
348 rate = AGP_MODE_V3_RATE_8x;
350 rate = AGP_MODE_V3_RATE_4x;
352 device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
354 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
356 /* Construct the new mode word and tell the hardware */
358 command = AGP_MODE_SET_RQ(0, rq);
359 command = AGP_MODE_SET_ARQSZ(command, arqsz);
360 command = AGP_MODE_SET_CAL(command, cal);
361 command = AGP_MODE_SET_SBA(command, sba);
362 command = AGP_MODE_SET_FW(command, fw);
363 command = AGP_MODE_SET_RATE(command, rate);
364 command = AGP_MODE_SET_MODE_3(command, 1);
365 command = AGP_MODE_SET_AGP(command, 1);
366 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
367 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
373 agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
375 u_int32_t tstatus, mstatus;
377 int rq, sba, fw, rate;
379 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
380 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
382 /* Set RQ to the min of mode, tstatus and mstatus */
383 rq = AGP_MODE_GET_RQ(mode);
384 if (AGP_MODE_GET_RQ(tstatus) < rq)
385 rq = AGP_MODE_GET_RQ(tstatus);
386 if (AGP_MODE_GET_RQ(mstatus) < rq)
387 rq = AGP_MODE_GET_RQ(mstatus);
389 /* Set SBA if all three can deal with SBA */
390 sba = (AGP_MODE_GET_SBA(tstatus)
391 & AGP_MODE_GET_SBA(mstatus)
392 & AGP_MODE_GET_SBA(mode));
395 fw = (AGP_MODE_GET_FW(tstatus)
396 & AGP_MODE_GET_FW(mstatus)
397 & AGP_MODE_GET_FW(mode));
399 /* Figure out the max rate */
400 rate = (AGP_MODE_GET_RATE(tstatus)
401 & AGP_MODE_GET_RATE(mstatus)
402 & AGP_MODE_GET_RATE(mode));
403 if (rate & AGP_MODE_V2_RATE_4x)
404 rate = AGP_MODE_V2_RATE_4x;
405 else if (rate & AGP_MODE_V2_RATE_2x)
406 rate = AGP_MODE_V2_RATE_2x;
408 rate = AGP_MODE_V2_RATE_1x;
410 device_printf(dev, "Setting AGP v2 mode %d\n", rate);
412 /* Construct the new mode word and tell the hardware */
414 command = AGP_MODE_SET_RQ(0, rq);
415 command = AGP_MODE_SET_SBA(command, sba);
416 command = AGP_MODE_SET_FW(command, fw);
417 command = AGP_MODE_SET_RATE(command, rate);
418 command = AGP_MODE_SET_AGP(command, 1);
419 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
420 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
426 agp_generic_enable(device_t dev, u_int32_t mode)
428 device_t mdev = agp_find_display();
429 u_int32_t tstatus, mstatus;
432 AGP_DPF("can't find display\n");
436 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
437 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
440 * Check display and bridge for AGP v3 support. AGP v3 allows
441 * more variety in topology than v2, e.g. multiple AGP devices
442 * attached to one bridge, or multiple AGP bridges in one
443 * system. This doesn't attempt to address those situations,
444 * but should work fine for a classic single AGP slot system
447 if (AGP_MODE_GET_MODE_3(mode) &&
448 AGP_MODE_GET_MODE_3(tstatus) &&
449 AGP_MODE_GET_MODE_3(mstatus))
450 return (agp_v3_enable(dev, mdev, mode));
452 return (agp_v2_enable(dev, mdev, mode));
456 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
458 struct agp_softc *sc = device_get_softc(dev);
459 struct agp_memory *mem;
461 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
464 if (sc->as_allocated + size > sc->as_maxmem)
468 kprintf("agp_generic_alloc_memory: unsupported type %d\n",
473 mem = kmalloc(sizeof *mem, M_AGP, M_INTWAIT);
474 mem->am_id = sc->as_nextid++;
477 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
478 mem->am_physical = 0;
480 mem->am_is_bound = 0;
481 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
482 sc->as_allocated += size;
488 agp_generic_free_memory(device_t dev, struct agp_memory *mem)
490 struct agp_softc *sc = device_get_softc(dev);
492 if (mem->am_is_bound)
495 sc->as_allocated -= mem->am_size;
496 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
497 vm_object_deallocate(mem->am_obj);
503 agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
506 struct agp_softc *sc = device_get_softc(dev);
511 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
513 if (mem->am_is_bound) {
514 device_printf(dev, "memory already bound\n");
515 lockmgr(&sc->as_lock, LK_RELEASE);
520 || (offset & (AGP_PAGE_SIZE - 1)) != 0
521 || offset + mem->am_size > AGP_GET_APERTURE(dev)) {
522 device_printf(dev, "binding memory at bad offset %#x,%#x,%#x\n",
523 (int) offset, (int)mem->am_size,
524 (int)AGP_GET_APERTURE(dev));
525 kprintf("Check BIOS's aperature size vs X\n");
526 lockmgr(&sc->as_lock, LK_RELEASE);
531 * Bind the individual pages and flush the chipset's
534 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
536 * Find a page from the object and wire it
537 * down. This page will be mapped using one or more
538 * entries in the GATT (assuming that PAGE_SIZE >=
539 * AGP_PAGE_SIZE. If this is the first call to bind,
540 * the pages will be allocated and zeroed.
542 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
543 VM_ALLOC_NORMAL | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
544 if ((m->flags & PG_ZERO) == 0)
545 vm_page_zero_fill(m);
546 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
550 * Install entries in the GATT, making sure that if
551 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
552 * aligned to PAGE_SIZE, we don't modify too many GATT
555 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
556 j += AGP_PAGE_SIZE) {
557 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
558 AGP_DPF("binding offset %#x to pa %#x\n",
560 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
563 * Bail out. Reverse all the mappings
564 * and unwire the pages.
567 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
568 AGP_UNBIND_PAGE(dev, offset + k);
569 lwkt_gettoken(&vm_token);
570 for (k = 0; k <= i; k += PAGE_SIZE) {
571 m = vm_page_lookup(mem->am_obj,
573 vm_page_unwire(m, 0);
575 lwkt_reltoken(&vm_token);
576 lockmgr(&sc->as_lock, LK_RELEASE);
584 * Flush the cpu cache since we are providing a new mapping
590 * Make sure the chipset gets the new mappings.
594 mem->am_offset = offset;
595 mem->am_is_bound = 1;
597 lockmgr(&sc->as_lock, LK_RELEASE);
603 agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
605 struct agp_softc *sc = device_get_softc(dev);
609 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
611 if (!mem->am_is_bound) {
612 device_printf(dev, "memory is not bound\n");
613 lockmgr(&sc->as_lock, LK_RELEASE);
619 * Unbind the individual pages and flush the chipset's
620 * TLB. Unwire the pages so they can be swapped.
622 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
623 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
624 lwkt_gettoken(&vm_token);
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);
629 lwkt_reltoken(&vm_token);
635 mem->am_is_bound = 0;
637 lockmgr(&sc->as_lock, LK_RELEASE);
642 /* Helper functions for implementing user/kernel api */
645 agp_acquire_helper(device_t dev, enum agp_acquire_state state)
647 struct agp_softc *sc = device_get_softc(dev);
649 if (sc->as_state != AGP_ACQUIRE_FREE)
651 sc->as_state = state;
657 agp_release_helper(device_t dev, enum agp_acquire_state state)
659 struct agp_softc *sc = device_get_softc(dev);
661 if (sc->as_state == AGP_ACQUIRE_FREE)
664 if (sc->as_state != state)
667 sc->as_state = AGP_ACQUIRE_FREE;
671 static struct agp_memory *
672 agp_find_memory(device_t dev, int id)
674 struct agp_softc *sc = device_get_softc(dev);
675 struct agp_memory *mem;
677 AGP_DPF("searching for memory block %d\n", id);
678 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
679 AGP_DPF("considering memory block %d\n", mem->am_id);
680 if (mem->am_id == id)
686 /* Implementation of the userland ioctl api */
689 agp_info_user(device_t dev, agp_info *info)
691 struct agp_softc *sc = device_get_softc(dev);
693 bzero(info, sizeof *info);
694 info->bridge_id = pci_get_devid(dev);
696 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
697 info->aper_base = rman_get_start(sc->as_aperture);
698 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
699 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
700 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
706 agp_setup_user(device_t dev, agp_setup *setup)
708 return AGP_ENABLE(dev, setup->agp_mode);
712 agp_allocate_user(device_t dev, agp_allocate *alloc)
714 struct agp_memory *mem;
716 mem = AGP_ALLOC_MEMORY(dev,
718 alloc->pg_count << AGP_PAGE_SHIFT);
720 alloc->key = mem->am_id;
721 alloc->physical = mem->am_physical;
729 agp_deallocate_user(device_t dev, int id)
731 struct agp_memory *mem = agp_find_memory(dev, id);
734 AGP_FREE_MEMORY(dev, mem);
742 agp_bind_user(device_t dev, agp_bind *bind)
744 struct agp_memory *mem = agp_find_memory(dev, bind->key);
749 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
753 agp_unbind_user(device_t dev, agp_unbind *unbind)
755 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
760 return AGP_UNBIND_MEMORY(dev, mem);
764 agp_open(struct dev_open_args *ap)
766 cdev_t kdev = ap->a_head.a_dev;
767 device_t dev = KDEV2DEV(kdev);
768 struct agp_softc *sc = device_get_softc(dev);
770 if (!sc->as_isopen) {
779 agp_close(struct dev_close_args *ap)
781 cdev_t kdev = ap->a_head.a_dev;
782 device_t dev = KDEV2DEV(kdev);
783 struct agp_softc *sc = device_get_softc(dev);
784 struct agp_memory *mem;
787 * Clear the GATT and force release on last close
789 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
790 if (mem->am_is_bound)
791 AGP_UNBIND_MEMORY(dev, mem);
792 AGP_FREE_MEMORY(dev, mem);
794 if (sc->as_state == AGP_ACQUIRE_USER)
795 agp_release_helper(dev, AGP_ACQUIRE_USER);
803 agp_ioctl(struct dev_ioctl_args *ap)
805 cdev_t kdev = ap->a_head.a_dev;
806 device_t dev = KDEV2DEV(kdev);
810 return agp_info_user(dev, (agp_info *)ap->a_data);
813 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
816 return agp_release_helper(dev, AGP_ACQUIRE_USER);
819 return agp_setup_user(dev, (agp_setup *)ap->a_data);
821 case AGPIOC_ALLOCATE:
822 return agp_allocate_user(dev, (agp_allocate *)ap->a_data);
824 case AGPIOC_DEALLOCATE:
825 return agp_deallocate_user(dev, *(int *)ap->a_data);
828 return agp_bind_user(dev, (agp_bind *)ap->a_data);
831 return agp_unbind_user(dev, (agp_unbind *)ap->a_data);
839 agp_mmap(struct dev_mmap_args *ap)
841 cdev_t kdev = ap->a_head.a_dev;
842 device_t dev = KDEV2DEV(kdev);
843 struct agp_softc *sc = device_get_softc(dev);
845 if (ap->a_offset > AGP_GET_APERTURE(dev))
847 ap->a_result = atop(rman_get_start(sc->as_aperture) + ap->a_offset);
851 /* Implementation of the kernel api */
854 agp_find_device(void)
856 device_t *children, child;
861 if (devclass_get_devices(agp_devclass, &children, &count) != 0)
864 for (i = 0; i < count; i++) {
865 if (device_is_attached(children[i])) {
870 kfree(children, M_TEMP);
874 enum agp_acquire_state
875 agp_state(device_t dev)
877 struct agp_softc *sc = device_get_softc(dev);
882 agp_get_info(device_t dev, struct agp_info *info)
884 struct agp_softc *sc = device_get_softc(dev);
887 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
888 info->ai_aperture_base = rman_get_start(sc->as_aperture);
889 info->ai_aperture_size = rman_get_size(sc->as_aperture);
890 info->ai_memory_allowed = sc->as_maxmem;
891 info->ai_memory_used = sc->as_allocated;
895 agp_acquire(device_t dev)
897 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
901 agp_release(device_t dev)
903 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
907 agp_enable(device_t dev, u_int32_t mode)
909 return AGP_ENABLE(dev, mode);
912 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
914 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
917 void agp_free_memory(device_t dev, void *handle)
919 struct agp_memory *mem = (struct agp_memory *) handle;
920 AGP_FREE_MEMORY(dev, mem);
923 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
925 struct agp_memory *mem = (struct agp_memory *) handle;
926 return AGP_BIND_MEMORY(dev, mem, offset);
929 int agp_unbind_memory(device_t dev, void *handle)
931 struct agp_memory *mem = (struct agp_memory *) handle;
932 return AGP_UNBIND_MEMORY(dev, mem);
935 void agp_memory_info(device_t dev, void *handle, struct
938 struct agp_memory *mem = (struct agp_memory *) handle;
940 mi->ami_size = mem->am_size;
941 mi->ami_physical = mem->am_physical;
942 mi->ami_offset = mem->am_offset;
943 mi->ami_is_bound = mem->am_is_bound;