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 $
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/device.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
40 #include <sys/agpio.h>
45 #include <bus/pci/pcivar.h>
46 #include <bus/pci/pcireg.h>
52 #include <vm/vm_object.h>
53 #include <vm/vm_page.h>
54 #include <vm/vm_pageout.h>
57 #include <machine/md_var.h>
59 MODULE_VERSION(agp, 1);
61 MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
63 #define CDEV_MAJOR 148
65 static d_open_t agp_open;
66 static d_close_t agp_close;
67 static d_ioctl_t agp_ioctl;
68 static d_mmap_t agp_mmap;
70 static struct dev_ops agp_ops = {
71 { "agp", CDEV_MAJOR, D_TTY },
78 static devclass_t agp_devclass;
79 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
81 /* Helper functions for implementing chipset mini drivers. */
86 #if defined(__i386__) || defined(__amd64__)
92 agp_find_caps(device_t dev)
98 * Check the CAP_LIST bit of the PCI status register first.
100 status = pci_read_config(dev, PCIR_STATUS, 2);
101 if (!(status & 0x10))
105 * Traverse the capabilities list.
107 for (ptr = pci_read_config(dev, AGP_CAPPTR, 1);
110 u_int32_t capid = pci_read_config(dev, ptr, 4);
111 next = AGP_CAPID_GET_NEXT_PTR(capid);
114 * If this capability entry ID is 2, then we are done.
116 if (AGP_CAPID_GET_CAP_ID(capid) == 2)
124 * Find an AGP display device (if any).
127 agp_find_display(void)
129 devclass_t pci = devclass_find("pci");
130 device_t bus, dev = 0;
132 int busnum, numkids, i;
134 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
135 bus = devclass_get_device(pci, busnum);
138 device_get_children(bus, &kids, &numkids);
139 for (i = 0; i < numkids; i++) {
141 if (pci_get_class(dev) == PCIC_DISPLAY
142 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
143 if (agp_find_caps(dev)) {
156 agp_alloc_gatt(device_t dev)
158 u_int32_t apsize = AGP_GET_APERTURE(dev);
159 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
160 struct agp_gatt *gatt;
164 "allocating GATT for aperture of size %dM\n",
165 apsize / (1024*1024));
168 device_printf(dev, "bad aperture size\n");
172 gatt = kmalloc(sizeof(struct agp_gatt), M_AGP, M_INTWAIT);
173 gatt->ag_entries = entries;
174 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP,
175 M_WAITOK|M_ZERO, 0, ~0, PAGE_SIZE, 0);
176 if (!gatt->ag_virtual) {
178 device_printf(dev, "contiguous allocation failed\n");
182 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
189 agp_free_gatt(struct agp_gatt *gatt)
191 contigfree(gatt->ag_virtual,
192 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
196 static u_int agp_max[][2] = {
207 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
210 * Sets the PCI resource which represents the AGP aperture.
212 * If not called, the default AGP aperture resource of AGP_APBASE will
213 * be used. Must be called before agp_generic_attach().
216 agp_set_aperture_resource(device_t dev, int rid)
218 struct agp_softc *sc = device_get_softc(dev);
220 sc->as_aperture_rid = rid;
224 agp_generic_attach(device_t dev)
226 struct agp_softc *sc = device_get_softc(dev);
231 * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
232 * because the kernel doesn't need to map it.
234 if (sc->as_aperture_rid == 0)
235 sc->as_aperture_rid = AGP_APBASE;
237 sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
238 &sc->as_aperture_rid, RF_SHAREABLE);
239 if (!sc->as_aperture)
243 * Work out an upper bound for agp memory allocation. This
244 * uses a heurisitc table from the Linux driver.
246 memsize = ptoa(Maxmem) >> 20;
247 for (i = 0; i < agp_max_size; i++) {
248 if (memsize <= agp_max[i][0])
251 if (i == agp_max_size) i = agp_max_size - 1;
252 sc->as_maxmem = agp_max[i][1] << 20U;
255 * The lock is used to prevent re-entry to
256 * agp_generic_bind_memory() since that function can sleep.
258 lockinit(&sc->as_lock, "agplk", 0, 0);
261 * Initialise stuff for the userland device.
263 agp_devclass = devclass_find("agp");
264 TAILQ_INIT(&sc->as_memory);
267 dev_ops_add(&agp_ops, -1, device_get_unit(dev));
268 make_dev(&agp_ops, device_get_unit(dev), UID_ROOT, GID_WHEEL,
275 agp_free_cdev(device_t dev)
277 dev_ops_remove(&agp_ops, -1, device_get_unit(dev));
281 agp_free_res(device_t dev)
283 struct agp_softc *sc = device_get_softc(dev);
285 bus_release_resource(dev, SYS_RES_MEMORY, sc->as_aperture_rid,
291 agp_generic_detach(device_t dev)
299 * Default AGP aperture size detection which simply returns the size of
300 * the aperture's PCI resource.
303 agp_generic_get_aperture(device_t dev)
305 struct agp_softc *sc = device_get_softc(dev);
307 return rman_get_size(sc->as_aperture);
311 * Default AGP aperture size setting function, which simply doesn't allow
312 * changes to resource size.
315 agp_generic_set_aperture(device_t dev, u_int32_t aperture)
317 u_int32_t current_aperture;
319 current_aperture = AGP_GET_APERTURE(dev);
320 if (current_aperture != aperture)
327 * This does the enable logic for v3, with the same topology
328 * restrictions as in place for v2 -- one bus, one device on the bus.
331 agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
333 u_int32_t tstatus, mstatus;
335 int rq, sba, fw, rate, arqsz, cal;
337 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
338 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
340 /* Set RQ to the min of mode, tstatus and mstatus */
341 rq = AGP_MODE_GET_RQ(mode);
342 if (AGP_MODE_GET_RQ(tstatus) < rq)
343 rq = AGP_MODE_GET_RQ(tstatus);
344 if (AGP_MODE_GET_RQ(mstatus) < rq)
345 rq = AGP_MODE_GET_RQ(mstatus);
348 * ARQSZ - Set the value to the maximum one.
349 * Don't allow the mode register to override values.
351 arqsz = AGP_MODE_GET_ARQSZ(mode);
352 if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
353 rq = AGP_MODE_GET_ARQSZ(tstatus);
354 if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
355 rq = AGP_MODE_GET_ARQSZ(mstatus);
357 /* Calibration cycle - don't allow override by mode register */
358 cal = AGP_MODE_GET_CAL(tstatus);
359 if (AGP_MODE_GET_CAL(mstatus) < cal)
360 cal = AGP_MODE_GET_CAL(mstatus);
362 /* SBA must be supported for AGP v3. */
365 /* Set FW if all three support it. */
366 fw = (AGP_MODE_GET_FW(tstatus)
367 & AGP_MODE_GET_FW(mstatus)
368 & AGP_MODE_GET_FW(mode));
370 /* Figure out the max rate */
371 rate = (AGP_MODE_GET_RATE(tstatus)
372 & AGP_MODE_GET_RATE(mstatus)
373 & AGP_MODE_GET_RATE(mode));
374 if (rate & AGP_MODE_V3_RATE_8x)
375 rate = AGP_MODE_V3_RATE_8x;
377 rate = AGP_MODE_V3_RATE_4x;
379 device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
381 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
383 /* Construct the new mode word and tell the hardware */
385 command = AGP_MODE_SET_RQ(0, rq);
386 command = AGP_MODE_SET_ARQSZ(command, arqsz);
387 command = AGP_MODE_SET_CAL(command, cal);
388 command = AGP_MODE_SET_SBA(command, sba);
389 command = AGP_MODE_SET_FW(command, fw);
390 command = AGP_MODE_SET_RATE(command, rate);
391 command = AGP_MODE_SET_MODE_3(command, 1);
392 command = AGP_MODE_SET_AGP(command, 1);
393 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
394 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
400 agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
402 u_int32_t tstatus, mstatus;
404 int rq, sba, fw, rate;
406 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
407 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
409 /* Set RQ to the min of mode, tstatus and mstatus */
410 rq = AGP_MODE_GET_RQ(mode);
411 if (AGP_MODE_GET_RQ(tstatus) < rq)
412 rq = AGP_MODE_GET_RQ(tstatus);
413 if (AGP_MODE_GET_RQ(mstatus) < rq)
414 rq = AGP_MODE_GET_RQ(mstatus);
416 /* Set SBA if all three can deal with SBA */
417 sba = (AGP_MODE_GET_SBA(tstatus)
418 & AGP_MODE_GET_SBA(mstatus)
419 & AGP_MODE_GET_SBA(mode));
422 fw = (AGP_MODE_GET_FW(tstatus)
423 & AGP_MODE_GET_FW(mstatus)
424 & AGP_MODE_GET_FW(mode));
426 /* Figure out the max rate */
427 rate = (AGP_MODE_GET_RATE(tstatus)
428 & AGP_MODE_GET_RATE(mstatus)
429 & AGP_MODE_GET_RATE(mode));
430 if (rate & AGP_MODE_V2_RATE_4x)
431 rate = AGP_MODE_V2_RATE_4x;
432 else if (rate & AGP_MODE_V2_RATE_2x)
433 rate = AGP_MODE_V2_RATE_2x;
435 rate = AGP_MODE_V2_RATE_1x;
437 device_printf(dev, "Setting AGP v2 mode %d\n", rate);
439 /* Construct the new mode word and tell the hardware */
441 command = AGP_MODE_SET_RQ(0, rq);
442 command = AGP_MODE_SET_SBA(command, sba);
443 command = AGP_MODE_SET_FW(command, fw);
444 command = AGP_MODE_SET_RATE(command, rate);
445 command = AGP_MODE_SET_AGP(command, 1);
446 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
447 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
453 agp_generic_enable(device_t dev, u_int32_t mode)
455 device_t mdev = agp_find_display();
456 u_int32_t tstatus, mstatus;
459 AGP_DPF("can't find display\n");
463 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
464 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
467 * Check display and bridge for AGP v3 support. AGP v3 allows
468 * more variety in topology than v2, e.g. multiple AGP devices
469 * attached to one bridge, or multiple AGP bridges in one
470 * system. This doesn't attempt to address those situations,
471 * but should work fine for a classic single AGP slot system
474 if (AGP_MODE_GET_MODE_3(mode) &&
475 AGP_MODE_GET_MODE_3(tstatus) &&
476 AGP_MODE_GET_MODE_3(mstatus))
477 return (agp_v3_enable(dev, mdev, mode));
479 return (agp_v2_enable(dev, mdev, mode));
483 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
485 struct agp_softc *sc = device_get_softc(dev);
486 struct agp_memory *mem;
488 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
491 if (sc->as_allocated + size > sc->as_maxmem)
495 kprintf("agp_generic_alloc_memory: unsupported type %d\n",
500 mem = kmalloc(sizeof *mem, M_AGP, M_INTWAIT);
501 mem->am_id = sc->as_nextid++;
504 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
505 mem->am_physical = 0;
507 mem->am_is_bound = 0;
508 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
509 sc->as_allocated += size;
515 agp_generic_free_memory(device_t dev, struct agp_memory *mem)
517 struct agp_softc *sc = device_get_softc(dev);
519 if (mem->am_is_bound)
522 sc->as_allocated -= mem->am_size;
523 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
524 vm_object_deallocate(mem->am_obj);
530 agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
533 struct agp_softc *sc = device_get_softc(dev);
538 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
540 if (mem->am_is_bound) {
541 device_printf(dev, "memory already bound\n");
542 lockmgr(&sc->as_lock, LK_RELEASE);
547 || (offset & (AGP_PAGE_SIZE - 1)) != 0
548 || offset + mem->am_size > AGP_GET_APERTURE(dev)) {
549 device_printf(dev, "binding memory at bad offset %#x,%#x,%#x\n",
550 (int) offset, (int)mem->am_size,
551 (int)AGP_GET_APERTURE(dev));
552 kprintf("Check BIOS's aperature size vs X\n");
553 lockmgr(&sc->as_lock, LK_RELEASE);
558 * Bind the individual pages and flush the chipset's
561 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
563 * Find a page from the object and wire it
564 * down. This page will be mapped using one or more
565 * entries in the GATT (assuming that PAGE_SIZE >=
566 * AGP_PAGE_SIZE. If this is the first call to bind,
567 * the pages will be allocated and zeroed.
569 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
570 VM_ALLOC_NORMAL | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
571 if ((m->flags & PG_ZERO) == 0)
572 vm_page_zero_fill(m);
573 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
577 * Install entries in the GATT, making sure that if
578 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
579 * aligned to PAGE_SIZE, we don't modify too many GATT
582 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
583 j += AGP_PAGE_SIZE) {
584 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
585 AGP_DPF("binding offset %#x to pa %#x\n",
587 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
590 * Bail out. Reverse all the mappings
591 * and unwire the pages.
594 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
595 AGP_UNBIND_PAGE(dev, offset + k);
596 for (k = 0; k <= i; k += PAGE_SIZE) {
597 m = vm_page_lookup(mem->am_obj,
599 vm_page_unwire(m, 0);
601 lockmgr(&sc->as_lock, LK_RELEASE);
609 * Flush the cpu cache since we are providing a new mapping
615 * Make sure the chipset gets the new mappings.
619 mem->am_offset = offset;
620 mem->am_is_bound = 1;
622 lockmgr(&sc->as_lock, LK_RELEASE);
628 agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
630 struct agp_softc *sc = device_get_softc(dev);
634 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
636 if (!mem->am_is_bound) {
637 device_printf(dev, "memory is not bound\n");
638 lockmgr(&sc->as_lock, LK_RELEASE);
644 * Unbind the individual pages and flush the chipset's
645 * TLB. Unwire the pages so they can be swapped.
647 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
648 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
649 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
650 m = vm_page_lookup(mem->am_obj, atop(i));
651 vm_page_unwire(m, 0);
658 mem->am_is_bound = 0;
660 lockmgr(&sc->as_lock, LK_RELEASE);
665 /* Helper functions for implementing user/kernel api */
668 agp_acquire_helper(device_t dev, enum agp_acquire_state state)
670 struct agp_softc *sc = device_get_softc(dev);
672 if (sc->as_state != AGP_ACQUIRE_FREE)
674 sc->as_state = state;
680 agp_release_helper(device_t dev, enum agp_acquire_state state)
682 struct agp_softc *sc = device_get_softc(dev);
684 if (sc->as_state == AGP_ACQUIRE_FREE)
687 if (sc->as_state != state)
690 sc->as_state = AGP_ACQUIRE_FREE;
694 static struct agp_memory *
695 agp_find_memory(device_t dev, int id)
697 struct agp_softc *sc = device_get_softc(dev);
698 struct agp_memory *mem;
700 AGP_DPF("searching for memory block %d\n", id);
701 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
702 AGP_DPF("considering memory block %d\n", mem->am_id);
703 if (mem->am_id == id)
709 /* Implementation of the userland ioctl api */
712 agp_info_user(device_t dev, agp_info *info)
714 struct agp_softc *sc = device_get_softc(dev);
716 bzero(info, sizeof *info);
717 info->bridge_id = pci_get_devid(dev);
719 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
720 info->aper_base = rman_get_start(sc->as_aperture);
721 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
722 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
723 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
729 agp_setup_user(device_t dev, agp_setup *setup)
731 return AGP_ENABLE(dev, setup->agp_mode);
735 agp_allocate_user(device_t dev, agp_allocate *alloc)
737 struct agp_memory *mem;
739 mem = AGP_ALLOC_MEMORY(dev,
741 alloc->pg_count << AGP_PAGE_SHIFT);
743 alloc->key = mem->am_id;
744 alloc->physical = mem->am_physical;
752 agp_deallocate_user(device_t dev, int id)
754 struct agp_memory *mem = agp_find_memory(dev, id);
757 AGP_FREE_MEMORY(dev, mem);
765 agp_bind_user(device_t dev, agp_bind *bind)
767 struct agp_memory *mem = agp_find_memory(dev, bind->key);
772 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
776 agp_unbind_user(device_t dev, agp_unbind *unbind)
778 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
783 return AGP_UNBIND_MEMORY(dev, mem);
787 agp_open(struct dev_open_args *ap)
789 cdev_t kdev = ap->a_head.a_dev;
790 device_t dev = KDEV2DEV(kdev);
791 struct agp_softc *sc = device_get_softc(dev);
793 if (!sc->as_isopen) {
802 agp_close(struct dev_close_args *ap)
804 cdev_t kdev = ap->a_head.a_dev;
805 device_t dev = KDEV2DEV(kdev);
806 struct agp_softc *sc = device_get_softc(dev);
807 struct agp_memory *mem;
810 * Clear the GATT and force release on last close
812 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
813 if (mem->am_is_bound)
814 AGP_UNBIND_MEMORY(dev, mem);
815 AGP_FREE_MEMORY(dev, mem);
817 if (sc->as_state == AGP_ACQUIRE_USER)
818 agp_release_helper(dev, AGP_ACQUIRE_USER);
826 agp_ioctl(struct dev_ioctl_args *ap)
828 cdev_t kdev = ap->a_head.a_dev;
829 device_t dev = KDEV2DEV(kdev);
833 return agp_info_user(dev, (agp_info *)ap->a_data);
836 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
839 return agp_release_helper(dev, AGP_ACQUIRE_USER);
842 return agp_setup_user(dev, (agp_setup *)ap->a_data);
844 case AGPIOC_ALLOCATE:
845 return agp_allocate_user(dev, (agp_allocate *)ap->a_data);
847 case AGPIOC_DEALLOCATE:
848 return agp_deallocate_user(dev, *(int *)ap->a_data);
851 return agp_bind_user(dev, (agp_bind *)ap->a_data);
854 return agp_unbind_user(dev, (agp_unbind *)ap->a_data);
862 agp_mmap(struct dev_mmap_args *ap)
864 cdev_t kdev = ap->a_head.a_dev;
865 device_t dev = KDEV2DEV(kdev);
866 struct agp_softc *sc = device_get_softc(dev);
868 if (ap->a_offset > AGP_GET_APERTURE(dev))
870 ap->a_result = atop(rman_get_start(sc->as_aperture) + ap->a_offset);
874 /* Implementation of the kernel api */
877 agp_find_device(void)
879 device_t *children, child;
884 if (devclass_get_devices(agp_devclass, &children, &count) != 0)
887 for (i = 0; i < count; i++) {
888 if (device_is_attached(children[i])) {
893 kfree(children, M_TEMP);
897 enum agp_acquire_state
898 agp_state(device_t dev)
900 struct agp_softc *sc = device_get_softc(dev);
905 agp_get_info(device_t dev, struct agp_info *info)
907 struct agp_softc *sc = device_get_softc(dev);
910 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
911 info->ai_aperture_base = rman_get_start(sc->as_aperture);
912 info->ai_aperture_size = rman_get_size(sc->as_aperture);
913 info->ai_memory_allowed = sc->as_maxmem;
914 info->ai_memory_used = sc->as_allocated;
918 agp_acquire(device_t dev)
920 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
924 agp_release(device_t dev)
926 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
930 agp_enable(device_t dev, u_int32_t mode)
932 return AGP_ENABLE(dev, mode);
935 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
937 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
940 void agp_free_memory(device_t dev, void *handle)
942 struct agp_memory *mem = (struct agp_memory *) handle;
943 AGP_FREE_MEMORY(dev, mem);
946 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
948 struct agp_memory *mem = (struct agp_memory *) handle;
949 return AGP_BIND_MEMORY(dev, mem, offset);
952 int agp_unbind_memory(device_t dev, void *handle)
954 struct agp_memory *mem = (struct agp_memory *) handle;
955 return AGP_UNBIND_MEMORY(dev, mem);
958 void agp_memory_info(device_t dev, void *handle, struct
961 struct agp_memory *mem = (struct agp_memory *) handle;
963 mi->ami_size = mem->am_size;
964 mi->ami_physical = mem->am_physical;
965 mi->ami_offset = mem->am_offset;
966 mi->ami_is_bound = mem->am_is_bound;