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/pci/agp.c,v 1.56 2007/07/13 16:28:11 anholt Exp $
27 * $DragonFly: src/sys/dev/agp/agp.c,v 1.28 2008/01/05 14:02:37 swildner 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/ioccom.h>
41 #include <sys/agpio.h>
46 #include <bus/pci/pcivar.h>
47 #include <bus/pci/pcireg.h>
53 #include <vm/vm_object.h>
54 #include <vm/vm_page.h>
55 #include <vm/vm_pageout.h>
58 #include <machine/md_var.h>
60 MODULE_VERSION(agp, 1);
62 MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
64 #define CDEV_MAJOR 148
66 static d_open_t agp_open;
67 static d_close_t agp_close;
68 static d_ioctl_t agp_ioctl;
69 static d_mmap_t agp_mmap;
71 static struct dev_ops agp_ops = {
72 { "agp", CDEV_MAJOR, D_TTY },
79 static devclass_t agp_devclass;
80 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
82 /* Helper functions for implementing chipset mini drivers. */
87 #if defined(__i386__) || defined(__amd64__)
93 agp_find_caps(device_t dev)
99 * Check the CAP_LIST bit of the PCI status register first.
101 status = pci_read_config(dev, PCIR_STATUS, 2);
102 if (!(status & 0x10))
106 * Traverse the capabilities list.
108 for (ptr = pci_read_config(dev, AGP_CAPPTR, 1);
111 u_int32_t capid = pci_read_config(dev, ptr, 4);
112 next = AGP_CAPID_GET_NEXT_PTR(capid);
115 * If this capability entry ID is 2, then we are done.
117 if (AGP_CAPID_GET_CAP_ID(capid) == 2)
125 * Find an AGP display device (if any).
128 agp_find_display(void)
130 devclass_t pci = devclass_find("pci");
131 device_t bus, dev = 0;
133 int busnum, numkids, i;
135 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
136 bus = devclass_get_device(pci, busnum);
139 device_get_children(bus, &kids, &numkids);
140 for (i = 0; i < numkids; i++) {
142 if (pci_get_class(dev) == PCIC_DISPLAY
143 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
144 if (agp_find_caps(dev)) {
157 agp_alloc_gatt(device_t dev)
159 u_int32_t apsize = AGP_GET_APERTURE(dev);
160 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
161 struct agp_gatt *gatt;
165 "allocating GATT for aperture of size %dM\n",
166 apsize / (1024*1024));
169 device_printf(dev, "bad aperture size\n");
173 gatt = kmalloc(sizeof(struct agp_gatt), M_AGP, M_INTWAIT);
174 gatt->ag_entries = entries;
175 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP,
176 M_WAITOK|M_ZERO, 0, ~0, PAGE_SIZE, 0);
177 if (!gatt->ag_virtual) {
179 device_printf(dev, "contiguous allocation failed\n");
183 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
190 agp_free_gatt(struct agp_gatt *gatt)
192 contigfree(gatt->ag_virtual,
193 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
197 static u_int agp_max[][2] = {
208 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
211 * Sets the PCI resource which represents the AGP aperture.
213 * If not called, the default AGP aperture resource of AGP_APBASE will
214 * be used. Must be called before agp_generic_attach().
217 agp_set_aperture_resource(device_t dev, int rid)
219 struct agp_softc *sc = device_get_softc(dev);
221 sc->as_aperture_rid = rid;
225 agp_generic_attach(device_t dev)
227 struct agp_softc *sc = device_get_softc(dev);
232 * Find and map the aperture, RF_SHAREABLE for DRM but not RF_ACTIVE
233 * because the kernel doesn't need to map it.
235 if (sc->as_aperture_rid == 0)
236 sc->as_aperture_rid = AGP_APBASE;
238 sc->as_aperture = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
239 &sc->as_aperture_rid, RF_SHAREABLE);
240 if (!sc->as_aperture)
244 * Work out an upper bound for agp memory allocation. This
245 * uses a heurisitc table from the Linux driver.
247 memsize = ptoa(Maxmem) >> 20;
248 for (i = 0; i < agp_max_size; i++) {
249 if (memsize <= agp_max[i][0])
252 if (i == agp_max_size) i = agp_max_size - 1;
253 sc->as_maxmem = agp_max[i][1] << 20U;
256 * The lock is used to prevent re-entry to
257 * agp_generic_bind_memory() since that function can sleep.
259 lockinit(&sc->as_lock, "agplk", 0, 0);
262 * Initialise stuff for the userland device.
264 agp_devclass = devclass_find("agp");
265 TAILQ_INIT(&sc->as_memory);
268 dev_ops_add(&agp_ops, -1, device_get_unit(dev));
269 make_dev(&agp_ops, device_get_unit(dev), UID_ROOT, GID_WHEEL,
276 agp_generic_detach(device_t dev)
278 struct agp_softc *sc = device_get_softc(dev);
280 bus_release_resource(dev, SYS_RES_MEMORY, AGP_APBASE, sc->as_aperture);
282 dev_ops_remove(&agp_ops, -1, device_get_unit(dev));
287 * Default AGP aperture size detection which simply returns the size of
288 * the aperture's PCI resource.
291 agp_generic_get_aperture(device_t dev)
293 struct agp_softc *sc = device_get_softc(dev);
295 return rman_get_size(sc->as_aperture);
299 * Default AGP aperture size setting function, which simply doesn't allow
300 * changes to resource size.
303 agp_generic_set_aperture(device_t dev, u_int32_t aperture)
305 u_int32_t current_aperture;
307 current_aperture = AGP_GET_APERTURE(dev);
308 if (current_aperture != aperture)
315 * This does the enable logic for v3, with the same topology
316 * restrictions as in place for v2 -- one bus, one device on the bus.
319 agp_v3_enable(device_t dev, device_t mdev, u_int32_t mode)
321 u_int32_t tstatus, mstatus;
323 int rq, sba, fw, rate, arqsz, cal;
325 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
326 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
328 /* Set RQ to the min of mode, tstatus and mstatus */
329 rq = AGP_MODE_GET_RQ(mode);
330 if (AGP_MODE_GET_RQ(tstatus) < rq)
331 rq = AGP_MODE_GET_RQ(tstatus);
332 if (AGP_MODE_GET_RQ(mstatus) < rq)
333 rq = AGP_MODE_GET_RQ(mstatus);
336 * ARQSZ - Set the value to the maximum one.
337 * Don't allow the mode register to override values.
339 arqsz = AGP_MODE_GET_ARQSZ(mode);
340 if (AGP_MODE_GET_ARQSZ(tstatus) > rq)
341 rq = AGP_MODE_GET_ARQSZ(tstatus);
342 if (AGP_MODE_GET_ARQSZ(mstatus) > rq)
343 rq = AGP_MODE_GET_ARQSZ(mstatus);
345 /* Calibration cycle - don't allow override by mode register */
346 cal = AGP_MODE_GET_CAL(tstatus);
347 if (AGP_MODE_GET_CAL(mstatus) < cal)
348 cal = AGP_MODE_GET_CAL(mstatus);
350 /* SBA must be supported for AGP v3. */
353 /* Set FW if all three support it. */
354 fw = (AGP_MODE_GET_FW(tstatus)
355 & AGP_MODE_GET_FW(mstatus)
356 & AGP_MODE_GET_FW(mode));
358 /* Figure out the max rate */
359 rate = (AGP_MODE_GET_RATE(tstatus)
360 & AGP_MODE_GET_RATE(mstatus)
361 & AGP_MODE_GET_RATE(mode));
362 if (rate & AGP_MODE_V3_RATE_8x)
363 rate = AGP_MODE_V3_RATE_8x;
365 rate = AGP_MODE_V3_RATE_4x;
367 device_printf(dev, "Setting AGP v3 mode %d\n", rate * 4);
369 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, 0, 4);
371 /* Construct the new mode word and tell the hardware */
373 command = AGP_MODE_SET_RQ(0, rq);
374 command = AGP_MODE_SET_ARQSZ(command, arqsz);
375 command = AGP_MODE_SET_CAL(command, cal);
376 command = AGP_MODE_SET_SBA(command, sba);
377 command = AGP_MODE_SET_FW(command, fw);
378 command = AGP_MODE_SET_RATE(command, rate);
379 command = AGP_MODE_SET_MODE_3(command, 1);
380 command = AGP_MODE_SET_AGP(command, 1);
381 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
382 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
388 agp_v2_enable(device_t dev, device_t mdev, u_int32_t mode)
390 u_int32_t tstatus, mstatus;
392 int rq, sba, fw, rate;
394 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
395 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
397 /* Set RQ to the min of mode, tstatus and mstatus */
398 rq = AGP_MODE_GET_RQ(mode);
399 if (AGP_MODE_GET_RQ(tstatus) < rq)
400 rq = AGP_MODE_GET_RQ(tstatus);
401 if (AGP_MODE_GET_RQ(mstatus) < rq)
402 rq = AGP_MODE_GET_RQ(mstatus);
404 /* Set SBA if all three can deal with SBA */
405 sba = (AGP_MODE_GET_SBA(tstatus)
406 & AGP_MODE_GET_SBA(mstatus)
407 & AGP_MODE_GET_SBA(mode));
410 fw = (AGP_MODE_GET_FW(tstatus)
411 & AGP_MODE_GET_FW(mstatus)
412 & AGP_MODE_GET_FW(mode));
414 /* Figure out the max rate */
415 rate = (AGP_MODE_GET_RATE(tstatus)
416 & AGP_MODE_GET_RATE(mstatus)
417 & AGP_MODE_GET_RATE(mode));
418 if (rate & AGP_MODE_V2_RATE_4x)
419 rate = AGP_MODE_V2_RATE_4x;
420 else if (rate & AGP_MODE_V2_RATE_2x)
421 rate = AGP_MODE_V2_RATE_2x;
423 rate = AGP_MODE_V2_RATE_1x;
425 device_printf(dev, "Setting AGP v2 mode %d\n", rate);
427 /* Construct the new mode word and tell the hardware */
429 command = AGP_MODE_SET_RQ(0, rq);
430 command = AGP_MODE_SET_SBA(command, sba);
431 command = AGP_MODE_SET_FW(command, fw);
432 command = AGP_MODE_SET_RATE(command, rate);
433 command = AGP_MODE_SET_AGP(command, 1);
434 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
435 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
441 agp_generic_enable(device_t dev, u_int32_t mode)
443 device_t mdev = agp_find_display();
444 u_int32_t tstatus, mstatus;
447 AGP_DPF("can't find display\n");
451 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
452 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
455 * Check display and bridge for AGP v3 support. AGP v3 allows
456 * more variety in topology than v2, e.g. multiple AGP devices
457 * attached to one bridge, or multiple AGP bridges in one
458 * system. This doesn't attempt to address those situations,
459 * but should work fine for a classic single AGP slot system
462 if (AGP_MODE_GET_MODE_3(mode) &&
463 AGP_MODE_GET_MODE_3(tstatus) &&
464 AGP_MODE_GET_MODE_3(mstatus))
465 return (agp_v3_enable(dev, mdev, mode));
467 return (agp_v2_enable(dev, mdev, mode));
471 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
473 struct agp_softc *sc = device_get_softc(dev);
474 struct agp_memory *mem;
476 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
479 if (sc->as_allocated + size > sc->as_maxmem)
483 kprintf("agp_generic_alloc_memory: unsupported type %d\n",
488 mem = kmalloc(sizeof *mem, M_AGP, M_INTWAIT);
489 mem->am_id = sc->as_nextid++;
492 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
493 mem->am_physical = 0;
495 mem->am_is_bound = 0;
496 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
497 sc->as_allocated += size;
503 agp_generic_free_memory(device_t dev, struct agp_memory *mem)
505 struct agp_softc *sc = device_get_softc(dev);
507 if (mem->am_is_bound)
510 sc->as_allocated -= mem->am_size;
511 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
512 vm_object_deallocate(mem->am_obj);
518 agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
521 struct agp_softc *sc = device_get_softc(dev);
526 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
528 if (mem->am_is_bound) {
529 device_printf(dev, "memory already bound\n");
530 lockmgr(&sc->as_lock, LK_RELEASE);
535 || (offset & (AGP_PAGE_SIZE - 1)) != 0
536 || offset + mem->am_size > AGP_GET_APERTURE(dev)) {
537 device_printf(dev, "binding memory at bad offset %#x,%#x,%#x\n",
538 (int) offset, (int)mem->am_size,
539 (int)AGP_GET_APERTURE(dev));
540 kprintf("Check BIOS's aperature size vs X\n");
541 lockmgr(&sc->as_lock, LK_RELEASE);
546 * Bind the individual pages and flush the chipset's
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_NORMAL | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
559 if ((m->flags & PG_ZERO) == 0)
560 vm_page_zero_fill(m);
561 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
565 * Install entries in the GATT, making sure that if
566 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
567 * aligned to PAGE_SIZE, we don't modify too many GATT
570 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
571 j += AGP_PAGE_SIZE) {
572 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
573 AGP_DPF("binding offset %#x to pa %#x\n",
575 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
578 * Bail out. Reverse all the mappings
579 * and unwire the pages.
582 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
583 AGP_UNBIND_PAGE(dev, offset + k);
584 for (k = 0; k <= i; k += PAGE_SIZE) {
585 m = vm_page_lookup(mem->am_obj,
587 vm_page_unwire(m, 0);
589 lockmgr(&sc->as_lock, LK_RELEASE);
597 * Flush the cpu cache since we are providing a new mapping
603 * Make sure the chipset gets the new mappings.
607 mem->am_offset = offset;
608 mem->am_is_bound = 1;
610 lockmgr(&sc->as_lock, LK_RELEASE);
616 agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
618 struct agp_softc *sc = device_get_softc(dev);
622 lockmgr(&sc->as_lock, LK_EXCLUSIVE);
624 if (!mem->am_is_bound) {
625 device_printf(dev, "memory is not bound\n");
626 lockmgr(&sc->as_lock, LK_RELEASE);
632 * Unbind the individual pages and flush the chipset's
633 * TLB. Unwire the pages so they can be swapped.
635 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
636 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
637 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
638 m = vm_page_lookup(mem->am_obj, atop(i));
639 vm_page_unwire(m, 0);
646 mem->am_is_bound = 0;
648 lockmgr(&sc->as_lock, LK_RELEASE);
653 /* Helper functions for implementing user/kernel api */
656 agp_acquire_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)
662 sc->as_state = state;
668 agp_release_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)
675 if (sc->as_state != state)
678 sc->as_state = AGP_ACQUIRE_FREE;
682 static struct agp_memory *
683 agp_find_memory(device_t dev, int id)
685 struct agp_softc *sc = device_get_softc(dev);
686 struct agp_memory *mem;
688 AGP_DPF("searching for memory block %d\n", id);
689 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
690 AGP_DPF("considering memory block %d\n", mem->am_id);
691 if (mem->am_id == id)
697 /* Implementation of the userland ioctl api */
700 agp_info_user(device_t dev, agp_info *info)
702 struct agp_softc *sc = device_get_softc(dev);
704 bzero(info, sizeof *info);
705 info->bridge_id = pci_get_devid(dev);
707 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
708 info->aper_base = rman_get_start(sc->as_aperture);
709 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
710 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
711 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
717 agp_setup_user(device_t dev, agp_setup *setup)
719 return AGP_ENABLE(dev, setup->agp_mode);
723 agp_allocate_user(device_t dev, agp_allocate *alloc)
725 struct agp_memory *mem;
727 mem = AGP_ALLOC_MEMORY(dev,
729 alloc->pg_count << AGP_PAGE_SHIFT);
731 alloc->key = mem->am_id;
732 alloc->physical = mem->am_physical;
740 agp_deallocate_user(device_t dev, int id)
742 struct agp_memory *mem = agp_find_memory(dev, id);
745 AGP_FREE_MEMORY(dev, mem);
753 agp_bind_user(device_t dev, agp_bind *bind)
755 struct agp_memory *mem = agp_find_memory(dev, bind->key);
760 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
764 agp_unbind_user(device_t dev, agp_unbind *unbind)
766 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
771 return AGP_UNBIND_MEMORY(dev, mem);
775 agp_open(struct dev_open_args *ap)
777 cdev_t kdev = ap->a_head.a_dev;
778 device_t dev = KDEV2DEV(kdev);
779 struct agp_softc *sc = device_get_softc(dev);
781 if (!sc->as_isopen) {
790 agp_close(struct dev_close_args *ap)
792 cdev_t kdev = ap->a_head.a_dev;
793 device_t dev = KDEV2DEV(kdev);
794 struct agp_softc *sc = device_get_softc(dev);
795 struct agp_memory *mem;
798 * Clear the GATT and force release on last close
800 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
801 if (mem->am_is_bound)
802 AGP_UNBIND_MEMORY(dev, mem);
803 AGP_FREE_MEMORY(dev, mem);
805 if (sc->as_state == AGP_ACQUIRE_USER)
806 agp_release_helper(dev, AGP_ACQUIRE_USER);
814 agp_ioctl(struct dev_ioctl_args *ap)
816 cdev_t kdev = ap->a_head.a_dev;
817 device_t dev = KDEV2DEV(kdev);
821 return agp_info_user(dev, (agp_info *)ap->a_data);
824 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
827 return agp_release_helper(dev, AGP_ACQUIRE_USER);
830 return agp_setup_user(dev, (agp_setup *)ap->a_data);
832 case AGPIOC_ALLOCATE:
833 return agp_allocate_user(dev, (agp_allocate *)ap->a_data);
835 case AGPIOC_DEALLOCATE:
836 return agp_deallocate_user(dev, *(int *)ap->a_data);
839 return agp_bind_user(dev, (agp_bind *)ap->a_data);
842 return agp_unbind_user(dev, (agp_unbind *)ap->a_data);
850 agp_mmap(struct dev_mmap_args *ap)
852 cdev_t kdev = ap->a_head.a_dev;
853 device_t dev = KDEV2DEV(kdev);
854 struct agp_softc *sc = device_get_softc(dev);
856 if (ap->a_offset > AGP_GET_APERTURE(dev))
858 ap->a_result = atop(rman_get_start(sc->as_aperture) + ap->a_offset);
862 /* Implementation of the kernel api */
865 agp_find_device(void)
867 device_t *children, child;
872 if (devclass_get_devices(agp_devclass, &children, &count) != 0)
875 for (i = 0; i < count; i++) {
876 if (device_is_attached(children[i])) {
881 kfree(children, M_TEMP);
885 enum agp_acquire_state
886 agp_state(device_t dev)
888 struct agp_softc *sc = device_get_softc(dev);
893 agp_get_info(device_t dev, struct agp_info *info)
895 struct agp_softc *sc = device_get_softc(dev);
898 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
899 info->ai_aperture_base = rman_get_start(sc->as_aperture);
900 info->ai_aperture_size = rman_get_size(sc->as_aperture);
901 info->ai_memory_allowed = sc->as_maxmem;
902 info->ai_memory_used = sc->as_allocated;
906 agp_acquire(device_t dev)
908 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
912 agp_release(device_t dev)
914 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
918 agp_enable(device_t dev, u_int32_t mode)
920 return AGP_ENABLE(dev, mode);
923 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
925 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
928 void agp_free_memory(device_t dev, void *handle)
930 struct agp_memory *mem = (struct agp_memory *) handle;
931 AGP_FREE_MEMORY(dev, mem);
934 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
936 struct agp_memory *mem = (struct agp_memory *) handle;
937 return AGP_BIND_MEMORY(dev, mem, offset);
940 int agp_unbind_memory(device_t dev, void *handle)
942 struct agp_memory *mem = (struct agp_memory *) handle;
943 return AGP_UNBIND_MEMORY(dev, mem);
946 void agp_memory_info(device_t dev, void *handle, struct
949 struct agp_memory *mem = (struct agp_memory *) handle;
951 mi->ami_size = mem->am_size;
952 mi->ami_physical = mem->am_physical;
953 mi->ami_offset = mem->am_offset;
954 mi->ami_is_bound = mem->am_is_bound;