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>
44 #include <sys/rwlock.h>
46 #include <dev/agp/agppriv.h>
47 #include <dev/agp/agpvar.h>
48 #include <dev/agp/agpreg.h>
49 #include <dev/pci/pcivar.h>
50 #include <dev/pci/pcireg.h>
53 #include <vm/vm_param.h>
54 #include <vm/vm_object.h>
55 #include <vm/vm_page.h>
56 #include <vm/vm_pageout.h>
59 #include <machine/bus.h>
60 #include <machine/resource.h>
63 MODULE_VERSION(agp, 1);
65 MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
68 static d_open_t agp_open;
69 static d_close_t agp_close;
70 static d_ioctl_t agp_ioctl;
71 static d_mmap_t agp_mmap;
73 static struct cdevsw agp_cdevsw = {
74 .d_version = D_VERSION,
75 .d_flags = D_NEEDGIANT,
83 static devclass_t agp_devclass;
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_cap(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.
223 if (sc->as_aperture_rid != -1) {
224 if (sc->as_aperture_rid == 0)
225 sc->as_aperture_rid = AGP_APBASE;
227 sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
228 &sc->as_aperture_rid, RF_SHAREABLE);
229 if (!sc->as_aperture)
234 * Work out an upper bound for agp memory allocation. This
235 * uses a heurisitc table from the Linux driver.
237 memsize = ptoa(realmem) >> 20;
238 for (i = 0; i < agp_max_size; i++) {
239 if (memsize <= agp_max[i][0])
242 if (i == agp_max_size)
243 i = agp_max_size - 1;
244 sc->as_maxmem = agp_max[i][1] << 20U;
247 * The lock is used to prevent re-entry to
248 * agp_generic_bind_memory() since that function can sleep.
250 mtx_init(&sc->as_lock, "agp lock", NULL, MTX_DEF);
253 * Initialise stuff for the userland device.
255 agp_devclass = devclass_find("agp");
256 TAILQ_INIT(&sc->as_memory);
259 sc->as_devnode = make_dev(&agp_cdevsw,
260 0, UID_ROOT, GID_WHEEL, 0600, "agpgart");
261 sc->as_devnode->si_drv1 = dev;
267 agp_free_cdev(device_t dev)
269 struct agp_softc *sc = device_get_softc(dev);
271 destroy_dev(sc->as_devnode);
275 agp_free_res(device_t dev)
277 struct agp_softc *sc = device_get_softc(dev);
279 if (sc->as_aperture != NULL)
280 bus_release_resource(dev, SYS_RES_MEMORY, sc->as_aperture_rid,
282 mtx_destroy(&sc->as_lock);
287 agp_generic_detach(device_t dev)
296 * Default AGP aperture size detection which simply returns the size of
297 * the aperture's PCI resource.
300 agp_generic_get_aperture(device_t dev)
302 struct agp_softc *sc = device_get_softc(dev);
304 return rman_get_size(sc->as_aperture);
308 * Default AGP aperture size setting function, which simply doesn't allow
309 * changes to resource size.
312 agp_generic_set_aperture(device_t dev, u_int32_t aperture)
314 u_int32_t current_aperture;
316 current_aperture = AGP_GET_APERTURE(dev);
317 if (current_aperture != aperture)
324 * This does the enable logic for v3, with the same topology
325 * restrictions as in place for v2 -- one bus, one device on the bus.
328 agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
330 u_int32_t tstatus, mstatus;
332 int rq, sba, fw, rate, arqsz, cal;
334 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
335 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
337 /* Set RQ to the min of mode, tstatus and mstatus */
338 rq = AGP_MODE_GET_RQ(mode);
339 if (AGP_MODE_GET_RQ(tstatus) < rq)
340 rq = AGP_MODE_GET_RQ(tstatus);
341 if (AGP_MODE_GET_RQ(mstatus) < rq)
342 rq = AGP_MODE_GET_RQ(mstatus);
345 * ARQSZ - Set the value to the maximum one.
346 * Don't allow the mode register to override values.
348 arqsz = AGP_MODE_GET_ARQSZ(mode);
349 if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
350 rq = AGP_MODE_GET_ARQSZ(tstatus);
351 if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
352 rq = AGP_MODE_GET_ARQSZ(mstatus);
354 /* Calibration cycle - don't allow override by mode register */
355 cal = AGP_MODE_GET_CAL(tstatus);
356 if (AGP_MODE_GET_CAL(mstatus) < cal)
357 cal = AGP_MODE_GET_CAL(mstatus);
359 /* SBA must be supported for AGP v3. */
362 /* Set FW if all three support it. */
363 fw = (AGP_MODE_GET_FW(tstatus)
364 & AGP_MODE_GET_FW(mstatus)
365 & AGP_MODE_GET_FW(mode));
367 /* Figure out the max rate */
368 rate = (AGP_MODE_GET_RATE(tstatus)
369 & AGP_MODE_GET_RATE(mstatus)
370 & AGP_MODE_GET_RATE(mode));
371 if (rate & AGP_MODE_V3_RATE_8x)
372 rate = AGP_MODE_V3_RATE_8x;
374 rate = AGP_MODE_V3_RATE_4x;
376 device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
378 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
380 /* Construct the new mode word and tell the hardware */
382 command = AGP_MODE_SET_RQ(0, rq);
383 command = AGP_MODE_SET_ARQSZ(command, arqsz);
384 command = AGP_MODE_SET_CAL(command, cal);
385 command = AGP_MODE_SET_SBA(command, sba);
386 command = AGP_MODE_SET_FW(command, fw);
387 command = AGP_MODE_SET_RATE(command, rate);
388 command = AGP_MODE_SET_MODE_3(command, 1);
389 command = AGP_MODE_SET_AGP(command, 1);
390 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
391 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
397 agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
399 u_int32_t tstatus, mstatus;
401 int rq, sba, fw, rate;
403 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
404 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
406 /* Set RQ to the min of mode, tstatus and mstatus */
407 rq = AGP_MODE_GET_RQ(mode);
408 if (AGP_MODE_GET_RQ(tstatus) < rq)
409 rq = AGP_MODE_GET_RQ(tstatus);
410 if (AGP_MODE_GET_RQ(mstatus) < rq)
411 rq = AGP_MODE_GET_RQ(mstatus);
413 /* Set SBA if all three can deal with SBA */
414 sba = (AGP_MODE_GET_SBA(tstatus)
415 & AGP_MODE_GET_SBA(mstatus)
416 & AGP_MODE_GET_SBA(mode));
419 fw = (AGP_MODE_GET_FW(tstatus)
420 & AGP_MODE_GET_FW(mstatus)
421 & AGP_MODE_GET_FW(mode));
423 /* Figure out the max rate */
424 rate = (AGP_MODE_GET_RATE(tstatus)
425 & AGP_MODE_GET_RATE(mstatus)
426 & AGP_MODE_GET_RATE(mode));
427 if (rate & AGP_MODE_V2_RATE_4x)
428 rate = AGP_MODE_V2_RATE_4x;
429 else if (rate & AGP_MODE_V2_RATE_2x)
430 rate = AGP_MODE_V2_RATE_2x;
432 rate = AGP_MODE_V2_RATE_1x;
434 device_printf(dev, "Setting AGP v2 mode %d\n", rate);
436 /* Construct the new mode word and tell the hardware */
438 command = AGP_MODE_SET_RQ(0, rq);
439 command = AGP_MODE_SET_SBA(command, sba);
440 command = AGP_MODE_SET_FW(command, fw);
441 command = AGP_MODE_SET_RATE(command, rate);
442 command = AGP_MODE_SET_AGP(command, 1);
443 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
444 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
450 agp_generic_enable(device_t dev, u_int32_t mode)
452 device_t mdev = agp_find_display();
453 u_int32_t tstatus, mstatus;
456 AGP_DPF("can't find display\n");
460 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
461 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
464 * Check display and bridge for AGP v3 support. AGP v3 allows
465 * more variety in topology than v2, e.g. multiple AGP devices
466 * attached to one bridge, or multiple AGP bridges in one
467 * system. This doesn't attempt to address those situations,
468 * but should work fine for a classic single AGP slot system
471 if (AGP_MODE_GET_MODE_3(mode) &&
472 AGP_MODE_GET_MODE_3(tstatus) &&
473 AGP_MODE_GET_MODE_3(mstatus))
474 return (agp_v3_enable(dev, mdev, mode));
476 return (agp_v2_enable(dev, mdev, mode));
480 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
482 struct agp_softc *sc = device_get_softc(dev);
483 struct agp_memory *mem;
485 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
488 if (sc->as_allocated + size > sc->as_maxmem)
492 printf("agp_generic_alloc_memory: unsupported type %d\n",
497 mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
498 mem->am_id = sc->as_nextid++;
501 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
502 mem->am_physical = 0;
504 mem->am_is_bound = 0;
505 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
506 sc->as_allocated += size;
512 agp_generic_free_memory(device_t dev, struct agp_memory *mem)
514 struct agp_softc *sc = device_get_softc(dev);
516 if (mem->am_is_bound)
519 sc->as_allocated -= mem->am_size;
520 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
521 vm_object_deallocate(mem->am_obj);
527 agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
530 struct agp_softc *sc = device_get_softc(dev);
535 /* Do some sanity checks first. */
536 if ((offset & (AGP_PAGE_SIZE - 1)) != 0 ||
537 offset + mem->am_size > AGP_GET_APERTURE(dev)) {
538 device_printf(dev, "binding memory at bad offset %#x\n",
544 * Allocate the pages early, before acquiring the lock,
545 * because vm_page_grab() may sleep and we can't hold a mutex
548 VM_OBJECT_WLOCK(mem->am_obj);
549 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
551 * Find a page from the object and wire it
552 * down. This page will be mapped using one or more
553 * entries in the GATT (assuming that PAGE_SIZE >=
554 * AGP_PAGE_SIZE. If this is the first call to bind,
555 * the pages will be allocated and zeroed.
557 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
558 VM_ALLOC_WIRED | VM_ALLOC_ZERO);
559 AGP_DPF("found page pa=%#jx\n", (uintmax_t)VM_PAGE_TO_PHYS(m));
561 VM_OBJECT_WUNLOCK(mem->am_obj);
563 mtx_lock(&sc->as_lock);
565 if (mem->am_is_bound) {
566 device_printf(dev, "memory already bound\n");
568 VM_OBJECT_WLOCK(mem->am_obj);
574 * Bind the individual pages and flush the chipset's
577 VM_OBJECT_WLOCK(mem->am_obj);
578 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
579 m = vm_page_lookup(mem->am_obj, OFF_TO_IDX(i));
582 * Install entries in the GATT, making sure that if
583 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
584 * aligned to PAGE_SIZE, we don't modify too many GATT
587 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
588 j += AGP_PAGE_SIZE) {
589 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
590 AGP_DPF("binding offset %#jx to pa %#jx\n",
591 (uintmax_t)offset + i + j, (uintmax_t)pa);
592 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
595 * Bail out. Reverse all the mappings
596 * and unwire the pages.
598 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
599 AGP_UNBIND_PAGE(dev, offset + k);
605 VM_OBJECT_WUNLOCK(mem->am_obj);
608 * Flush the cpu cache since we are providing a new mapping
614 * Make sure the chipset gets the new mappings.
618 mem->am_offset = offset;
619 mem->am_is_bound = 1;
621 mtx_unlock(&sc->as_lock);
625 mtx_unlock(&sc->as_lock);
626 VM_OBJECT_ASSERT_WLOCKED(mem->am_obj);
627 for (k = 0; k < mem->am_size; k += PAGE_SIZE) {
628 m = vm_page_lookup(mem->am_obj, OFF_TO_IDX(k));
632 vm_page_unwire(m, 0);
635 VM_OBJECT_WUNLOCK(mem->am_obj);
641 agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
643 struct agp_softc *sc = device_get_softc(dev);
647 mtx_lock(&sc->as_lock);
649 if (!mem->am_is_bound) {
650 device_printf(dev, "memory is not bound\n");
651 mtx_unlock(&sc->as_lock);
657 * Unbind the individual pages and flush the chipset's
658 * TLB. Unwire the pages so they can be swapped.
660 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
661 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
662 VM_OBJECT_WLOCK(mem->am_obj);
663 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
664 m = vm_page_lookup(mem->am_obj, atop(i));
666 vm_page_unwire(m, 0);
669 VM_OBJECT_WUNLOCK(mem->am_obj);
675 mem->am_is_bound = 0;
677 mtx_unlock(&sc->as_lock);
682 /* Helper functions for implementing user/kernel api */
685 agp_acquire_helper(device_t dev, enum agp_acquire_state state)
687 struct agp_softc *sc = device_get_softc(dev);
689 if (sc->as_state != AGP_ACQUIRE_FREE)
691 sc->as_state = state;
697 agp_release_helper(device_t dev, enum agp_acquire_state state)
699 struct agp_softc *sc = device_get_softc(dev);
701 if (sc->as_state == AGP_ACQUIRE_FREE)
704 if (sc->as_state != state)
707 sc->as_state = AGP_ACQUIRE_FREE;
711 static struct agp_memory *
712 agp_find_memory(device_t dev, int id)
714 struct agp_softc *sc = device_get_softc(dev);
715 struct agp_memory *mem;
717 AGP_DPF("searching for memory block %d\n", id);
718 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
719 AGP_DPF("considering memory block %d\n", mem->am_id);
720 if (mem->am_id == id)
726 /* Implementation of the userland ioctl api */
729 agp_info_user(device_t dev, agp_info *info)
731 struct agp_softc *sc = device_get_softc(dev);
733 bzero(info, sizeof *info);
734 info->bridge_id = pci_get_devid(dev);
736 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
738 info->aper_base = rman_get_start(sc->as_aperture);
741 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
742 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
743 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
749 agp_setup_user(device_t dev, agp_setup *setup)
751 return AGP_ENABLE(dev, setup->agp_mode);
755 agp_allocate_user(device_t dev, agp_allocate *alloc)
757 struct agp_memory *mem;
759 mem = AGP_ALLOC_MEMORY(dev,
761 alloc->pg_count << AGP_PAGE_SHIFT);
763 alloc->key = mem->am_id;
764 alloc->physical = mem->am_physical;
772 agp_deallocate_user(device_t dev, int id)
774 struct agp_memory *mem = agp_find_memory(dev, id);
777 AGP_FREE_MEMORY(dev, mem);
785 agp_bind_user(device_t dev, agp_bind *bind)
787 struct agp_memory *mem = agp_find_memory(dev, bind->key);
792 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
796 agp_unbind_user(device_t dev, agp_unbind *unbind)
798 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
803 return AGP_UNBIND_MEMORY(dev, mem);
807 agp_chipset_flush(device_t dev)
810 return (AGP_CHIPSET_FLUSH(dev));
814 agp_open(struct cdev *kdev, int oflags, int devtype, struct thread *td)
816 device_t dev = kdev->si_drv1;
817 struct agp_softc *sc = device_get_softc(dev);
819 if (!sc->as_isopen) {
828 agp_close(struct cdev *kdev, int fflag, int devtype, struct thread *td)
830 device_t dev = kdev->si_drv1;
831 struct agp_softc *sc = device_get_softc(dev);
832 struct agp_memory *mem;
835 * Clear the GATT and force release on last close
837 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
838 if (mem->am_is_bound)
839 AGP_UNBIND_MEMORY(dev, mem);
840 AGP_FREE_MEMORY(dev, mem);
842 if (sc->as_state == AGP_ACQUIRE_USER)
843 agp_release_helper(dev, AGP_ACQUIRE_USER);
851 agp_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int fflag, struct thread *td)
853 device_t dev = kdev->si_drv1;
857 return agp_info_user(dev, (agp_info *) data);
860 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
863 return agp_release_helper(dev, AGP_ACQUIRE_USER);
866 return agp_setup_user(dev, (agp_setup *)data);
868 case AGPIOC_ALLOCATE:
869 return agp_allocate_user(dev, (agp_allocate *)data);
871 case AGPIOC_DEALLOCATE:
872 return agp_deallocate_user(dev, *(int *) data);
875 return agp_bind_user(dev, (agp_bind *)data);
878 return agp_unbind_user(dev, (agp_unbind *)data);
880 case AGPIOC_CHIPSET_FLUSH:
881 return agp_chipset_flush(dev);
888 agp_mmap(struct cdev *kdev, vm_ooffset_t offset, vm_paddr_t *paddr,
889 int prot, vm_memattr_t *memattr)
891 device_t dev = kdev->si_drv1;
892 struct agp_softc *sc = device_get_softc(dev);
894 if (offset > AGP_GET_APERTURE(dev))
896 if (sc->as_aperture == NULL)
898 *paddr = rman_get_start(sc->as_aperture) + offset;
902 /* Implementation of the kernel api */
907 device_t *children, child;
912 if (devclass_get_devices(agp_devclass, &children, &count) != 0)
915 for (i = 0; i < count; i++) {
916 if (device_is_attached(children[i])) {
921 free(children, M_TEMP);
925 enum agp_acquire_state
926 agp_state(device_t dev)
928 struct agp_softc *sc = device_get_softc(dev);
933 agp_get_info(device_t dev, struct agp_info *info)
935 struct agp_softc *sc = device_get_softc(dev);
938 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
939 if (sc->as_aperture != NULL)
940 info->ai_aperture_base = rman_get_start(sc->as_aperture);
942 info->ai_aperture_base = 0;
943 info->ai_aperture_size = AGP_GET_APERTURE(dev);
944 info->ai_memory_allowed = sc->as_maxmem;
945 info->ai_memory_used = sc->as_allocated;
949 agp_acquire(device_t dev)
951 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
955 agp_release(device_t dev)
957 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
961 agp_enable(device_t dev, u_int32_t mode)
963 return AGP_ENABLE(dev, mode);
966 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
968 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
971 void agp_free_memory(device_t dev, void *handle)
973 struct agp_memory *mem = (struct agp_memory *) handle;
974 AGP_FREE_MEMORY(dev, mem);
977 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
979 struct agp_memory *mem = (struct agp_memory *) handle;
980 return AGP_BIND_MEMORY(dev, mem, offset);
983 int agp_unbind_memory(device_t dev, void *handle)
985 struct agp_memory *mem = (struct agp_memory *) handle;
986 return AGP_UNBIND_MEMORY(dev, mem);
989 void agp_memory_info(device_t dev, void *handle, struct
992 struct agp_memory *mem = (struct agp_memory *) handle;
994 mi->ami_size = mem->am_size;
995 mi->ami_physical = mem->am_physical;
996 mi->ami_offset = mem->am_offset;
997 mi->ami_is_bound = mem->am_is_bound;