1/*-
2 * Copyright (c) 2000 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/agp/agp.c 66615 2000-10-04 01:29:17Z jasone $
27 */
28
29#include "opt_bus.h"
30#include "opt_pci.h"
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/malloc.h>
35#include <sys/kernel.h>
36#include <sys/bus.h>
37#include <sys/conf.h>
38#include <sys/ioccom.h>
39#include <sys/agpio.h>
40#include <sys/lock.h>
41#include <sys/proc.h>
42
43#include <pci/pcivar.h>
44#include <pci/pcireg.h>
45#include <pci/agppriv.h>
46#include <pci/agpvar.h>
47#include <pci/agpreg.h>
48
49#include <vm/vm.h>
50#include <vm/vm_object.h>
51#include <vm/vm_page.h>
52#include <vm/vm_pageout.h>
53#include <vm/pmap.h>
54
55#include <machine/md_var.h>
56#include <machine/bus.h>
57#include <machine/resource.h>
58#include <sys/rman.h>
59
60MODULE_VERSION(agp, 1);
61
62MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
63
64#define CDEV_MAJOR 148
65 /* agp_drv.c */
66static d_open_t agp_open;
67static d_close_t agp_close;
68static d_ioctl_t agp_ioctl;
69static d_mmap_t agp_mmap;
70
71static struct cdevsw agp_cdevsw = {
72 /* open */ agp_open,
73 /* close */ agp_close,
74 /* read */ noread,
75 /* write */ nowrite,
76 /* ioctl */ agp_ioctl,
77 /* poll */ nopoll,
78 /* mmap */ agp_mmap,
79 /* strategy */ nostrategy,
80 /* name */ "agp",
81 /* maj */ CDEV_MAJOR,
82 /* dump */ nodump,
83 /* psize */ nopsize,
84 /* flags */ D_TTY,
85 /* bmaj */ -1
86};
87
88static devclass_t agp_devclass;
89#define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
90
91/* Helper functions for implementing chipset mini drivers. */
92
93void
94agp_flush_cache()
95{
96#ifdef __i386__
97 wbinvd();
98#endif
99}
100
101u_int8_t
102agp_find_caps(device_t dev)
103{
104 u_int32_t status;
105 u_int8_t ptr, next;
106
107 /*
108 * Check the CAP_LIST bit of the PCI status register first.
109 */
110 status = pci_read_config(dev, PCIR_STATUS, 2);
111 if (!(status & 0x10))
112 return 0;
113
114 /*
115 * Traverse the capabilities list.
116 */
117 for (ptr = pci_read_config(dev, AGP_CAPPTR, 1);
118 ptr != 0;
119 ptr = next) {
120 u_int32_t capid = pci_read_config(dev, ptr, 4);
121 next = AGP_CAPID_GET_NEXT_PTR(capid);
122
123 /*
124 * If this capability entry ID is 2, then we are done.
125 */
126 if (AGP_CAPID_GET_CAP_ID(capid) == 2)
127 return ptr;
128 }
129
130 return 0;
131}
132
133/*
134 * Find an AGP display device (if any).
135 */
136static device_t
137agp_find_display(void)
138{
139 devclass_t pci = devclass_find("pci");
140 device_t bus, dev = 0;
141 device_t *kids;
142 int busnum, numkids, i;
143
144 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
145 bus = devclass_get_device(pci, busnum);
146 if (!bus)
147 continue;
148 device_get_children(bus, &kids, &numkids);
149 for (i = 0; i < numkids; i++) {
150 dev = kids[i];
151 if (pci_get_class(dev) == PCIC_DISPLAY
152 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
153 if (agp_find_caps(dev)) {
154 free(kids, M_TEMP);
155 return dev;
156 }
157
158 }
159 free(kids, M_TEMP);
160 }
161
162 return 0;
163}
164
165struct agp_gatt *
166agp_alloc_gatt(device_t dev)
167{
168 u_int32_t apsize = AGP_GET_APERTURE(dev);
169 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
170 struct agp_gatt *gatt;
171
172 if (bootverbose)
173 device_printf(dev,
174 "allocating GATT for aperture of size %dM\n",
175 apsize / (1024*1024));
176
177 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
178 if (!gatt)
179 return 0;
180
181 gatt->ag_entries = entries;
182 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP, 0,
183 0, ~0, PAGE_SIZE, 0);
184 if (!gatt->ag_virtual) {
185 if (bootverbose)
186 device_printf(dev, "contiguous allocation failed\n");
187 free(gatt, M_AGP);
188 return 0;
189 }
190 bzero(gatt->ag_virtual, entries * sizeof(u_int32_t));
191 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
192 agp_flush_cache();
193
194 return gatt;
195}
196
197void
198agp_free_gatt(struct agp_gatt *gatt)
199{
200 contigfree(gatt->ag_virtual,
201 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
202 free(gatt, M_AGP);
203}
204
205static int agp_max[][2] = {
206 {0, 0},
207 {32, 4},
208 {64, 28},
209 {128, 96},
210 {256, 204},
211 {512, 440},
212 {1024, 942},
213 {2048, 1920},
214 {4096, 3932}
215};
216#define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
217
218int
219agp_generic_attach(device_t dev)
220{
221 struct agp_softc *sc = device_get_softc(dev);
222 int rid, memsize, i;
223
224 /*
225 * Find and map the aperture.
226 */
227 rid = AGP_APBASE;
228 sc->as_aperture = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
229 0, ~0, 1, RF_ACTIVE);
230 if (!sc->as_aperture)
231 return ENOMEM;
232
233 /*
234 * Work out an upper bound for agp memory allocation. This
235 * uses a heurisitc table from the Linux driver.
236 */
237 memsize = ptoa(Maxmem) >> 20;
238 for (i = 0; i < agp_max_size; i++) {
239 if (memsize <= agp_max[i][0])
240 break;
241 }
242 if (i == agp_max_size) i = agp_max_size - 1;
243 sc->as_maxmem = agp_max[i][1] << 20U;
244
245 /*
246 * The lock is used to prevent re-entry to
247 * agp_generic_bind_memory() since that function can sleep.
248 */
249 lockinit(&sc->as_lock, PZERO|PCATCH, "agplk", 0, 0);
250
251 /*
252 * Initialise stuff for the userland device.
253 */
254 agp_devclass = devclass_find("agp");
255 TAILQ_INIT(&sc->as_memory);
256 sc->as_nextid = 1;
257
258 sc->as_devnode = make_dev(&agp_cdevsw,
259 device_get_unit(dev),
260 UID_ROOT,
261 GID_WHEEL,
262 0600,
263 "agpgart");
264
265 return 0;
266}
267
268int
269agp_generic_detach(device_t dev)
270{
271 struct agp_softc *sc = device_get_softc(dev);
272 bus_release_resource(dev, SYS_RES_MEMORY, AGP_APBASE, sc->as_aperture);
273 lockmgr(&sc->as_lock, LK_DRAIN, 0, curproc);
274 lockdestroy(&sc->as_lock);
275 destroy_dev(sc->as_devnode);
276 agp_flush_cache();
277 return 0;
278}
279
280int
281agp_generic_enable(device_t dev, u_int32_t mode)
282{
283 device_t mdev = agp_find_display();
284 u_int32_t tstatus, mstatus;
285 u_int32_t command;
286 int rq, sba, fw, rate;;
287
288 if (!mdev) {
289 AGP_DPF("can't find display\n");
290 return ENXIO;
291 }
292
293 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
294 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
295
296 /* Set RQ to the min of mode, tstatus and mstatus */
297 rq = AGP_MODE_GET_RQ(mode);
298 if (AGP_MODE_GET_RQ(tstatus) < rq)
299 rq = AGP_MODE_GET_RQ(tstatus);
300 if (AGP_MODE_GET_RQ(mstatus) < rq)
301 rq = AGP_MODE_GET_RQ(mstatus);
302
303 /* Set SBA if all three can deal with SBA */
304 sba = (AGP_MODE_GET_SBA(tstatus)
305 & AGP_MODE_GET_SBA(mstatus)
306 & AGP_MODE_GET_SBA(mode));
307
308 /* Similar for FW */
309 fw = (AGP_MODE_GET_FW(tstatus)
310 & AGP_MODE_GET_FW(mstatus)
311 & AGP_MODE_GET_FW(mode));
312
313 /* Figure out the max rate */
314 rate = (AGP_MODE_GET_RATE(tstatus)
315 & AGP_MODE_GET_RATE(mstatus)
316 & AGP_MODE_GET_RATE(mode));
317 if (rate & AGP_MODE_RATE_4x)
318 rate = AGP_MODE_RATE_4x;
319 else if (rate & AGP_MODE_RATE_2x)
320 rate = AGP_MODE_RATE_2x;
321 else
322 rate = AGP_MODE_RATE_1x;
323
324 /* Construct the new mode word and tell the hardware */
325 command = AGP_MODE_SET_RQ(0, rq);
326 command = AGP_MODE_SET_SBA(command, sba);
327 command = AGP_MODE_SET_FW(command, fw);
328 command = AGP_MODE_SET_RATE(command, rate);
329 command = AGP_MODE_SET_AGP(command, 1);
330 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
331 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
332
333 return 0;
334}
335
336struct agp_memory *
337agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
338{
339 struct agp_softc *sc = device_get_softc(dev);
340 struct agp_memory *mem;
341
342 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
343 return 0;
344
345 if (sc->as_allocated + size > sc->as_maxmem)
346 return 0;
347
348 if (type != 0) {
349 printf("agp_generic_alloc_memory: unsupported type %d\n",
350 type);
351 return 0;
352 }
353
354 mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
355 mem->am_id = sc->as_nextid++;
356 mem->am_size = size;
357 mem->am_type = 0;
358 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
359 mem->am_physical = 0;
360 mem->am_offset = 0;
361 mem->am_is_bound = 0;
362 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
363 sc->as_allocated += size;
364
365 return mem;
366}
367
368int
369agp_generic_free_memory(device_t dev, struct agp_memory *mem)
370{
371 struct agp_softc *sc = device_get_softc(dev);
372
373 if (mem->am_is_bound)
374 return EBUSY;
375
376 sc->as_allocated -= mem->am_size;
377 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
378 vm_object_deallocate(mem->am_obj);
379 free(mem, M_AGP);
380 return 0;
381}
382
383int
384agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
385 vm_offset_t offset)
386{
387 struct agp_softc *sc = device_get_softc(dev);
388 vm_offset_t i, j, k;
389 vm_page_t m;
390 int error;
391
392 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curproc);
393
394 if (mem->am_is_bound) {
395 device_printf(dev, "memory already bound\n");
396 return EINVAL;
397 }
398
399 if (offset < 0
400 || (offset & (AGP_PAGE_SIZE - 1)) != 0
401 || offset + mem->am_size > AGP_GET_APERTURE(dev)) {
402 device_printf(dev, "binding memory at bad offset %#x\n",
403 (int) offset);
404 return EINVAL;
405 }
406
407 /*
408 * Bind the individual pages and flush the chipset's
409 * TLB.
410 *
411 * XXX Presumably, this needs to be the pci address on alpha
412 * (i.e. use alpha_XXX_dmamap()). I don't have access to any
413 * alpha AGP hardware to check.
414 */
415 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
416 /*
417 * Find a page from the object and wire it
418 * down. This page will be mapped using one or more
419 * entries in the GATT (assuming that PAGE_SIZE >=
420 * AGP_PAGE_SIZE. If this is the first call to bind,
421 * the pages will be allocated and zeroed.
422 */
423 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
424 VM_ALLOC_ZERO | VM_ALLOC_RETRY);
425 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
426 vm_page_wire(m);
427
428 /*
429 * Install entries in the GATT, making sure that if
430 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
431 * aligned to PAGE_SIZE, we don't modify too many GATT
432 * entries.
433 */
434 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
435 j += AGP_PAGE_SIZE) {
436 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
437 AGP_DPF("binding offset %#x to pa %#x\n",
438 offset + i + j, pa);
439 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
440 if (error) {
441 /*
442 * Bail out. Reverse all the mappings
443 * and unwire the pages.
444 */
445 vm_page_wakeup(m);
446 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
447 AGP_UNBIND_PAGE(dev, offset + k);
448 for (k = 0; k <= i; k += PAGE_SIZE) {
449 m = vm_page_lookup(mem->am_obj,
450 OFF_TO_IDX(k));
451 vm_page_unwire(m, 0);
452 }
453 lockmgr(&sc->as_lock, LK_RELEASE, 0, curproc);
454 return error;
455 }
456 }
457 vm_page_wakeup(m);
458 }
459
460 /*
461 * Flush the cpu cache since we are providing a new mapping
462 * for these pages.
463 */
464 agp_flush_cache();
465
466 /*
467 * Make sure the chipset gets the new mappings.
468 */
469 AGP_FLUSH_TLB(dev);
470
471 mem->am_offset = offset;
472 mem->am_is_bound = 1;
473
474 lockmgr(&sc->as_lock, LK_RELEASE, 0, curproc);
475
476 return 0;
477}
478
479int
480agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
481{
482 struct agp_softc *sc = device_get_softc(dev);
483 vm_page_t m;
484 int i;
485
486 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curproc);
487
488 if (!mem->am_is_bound) {
489 device_printf(dev, "memory is not bound\n");
490 return EINVAL;
491 }
492
493
494 /*
495 * Unbind the individual pages and flush the chipset's
496 * TLB. Unwire the pages so they can be swapped.
497 */
498 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
499 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
500 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
501 m = vm_page_lookup(mem->am_obj, atop(i));
502 vm_page_unwire(m, 0);
503 }
504
505 agp_flush_cache();
506 AGP_FLUSH_TLB(dev);
507
508 mem->am_offset = 0;
509 mem->am_is_bound = 0;
510
511 lockmgr(&sc->as_lock, LK_RELEASE, 0, curproc);
512
513 return 0;
514}
515
516/* Helper functions for implementing user/kernel api */
517
518static int
519agp_acquire_helper(device_t dev, enum agp_acquire_state state)
520{
521 struct agp_softc *sc = device_get_softc(dev);
522
523 if (sc->as_state != AGP_ACQUIRE_FREE)
524 return EBUSY;
525 sc->as_state = state;
526
527 return 0;
528}
529
530static int
531agp_release_helper(device_t dev, enum agp_acquire_state state)
532{
533 struct agp_softc *sc = device_get_softc(dev);
534 struct agp_memory *mem;
535
536 if (sc->as_state == AGP_ACQUIRE_FREE)
537 return 0;
538
539 if (sc->as_state != state)
540 return EBUSY;
541
542 /*
543 * Clear out the aperture and free any outstanding memory blocks.
544 */
545 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
546 if (mem->am_is_bound)
547 AGP_UNBIND_MEMORY(dev, mem);
548 AGP_FREE_MEMORY(dev, mem);
549 }
550
551 sc->as_state = AGP_ACQUIRE_FREE;
552 return 0;
553}
554
555static struct agp_memory *
556agp_find_memory(device_t dev, int id)
557{
558 struct agp_softc *sc = device_get_softc(dev);
559 struct agp_memory *mem;
560
561 AGP_DPF("searching for memory block %d\n", id);
562 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
563 AGP_DPF("considering memory block %d\n", mem->am_id);
564 if (mem->am_id == id)
565 return mem;
566 }
567 return 0;
568}
569
570/* Implementation of the userland ioctl api */
571
572static int
573agp_info_user(device_t dev, agp_info *info)
574{
575 struct agp_softc *sc = device_get_softc(dev);
576
577 bzero(info, sizeof *info);
578 info->bridge_id = pci_get_devid(dev);
579 info->agp_mode =
580 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
581 info->aper_base = rman_get_start(sc->as_aperture);
582 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
583 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
584 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
585
586 return 0;
587}
588
589static int
590agp_setup_user(device_t dev, agp_setup *setup)
591{
592 return AGP_ENABLE(dev, setup->agp_mode);
593}
594
595static int
596agp_allocate_user(device_t dev, agp_allocate *alloc)
597{
598 struct agp_memory *mem;
599
600 mem = AGP_ALLOC_MEMORY(dev,
601 alloc->type,
602 alloc->pg_count << AGP_PAGE_SHIFT);
603 if (mem) {
604 alloc->key = mem->am_id;
605 alloc->physical = mem->am_physical;
606 return 0;
607 } else {
608 return ENOMEM;
609 }
610}
611
612static int
613agp_deallocate_user(device_t dev, int id)
614{
615 struct agp_memory *mem = agp_find_memory(dev, id);;
616
617 if (mem) {
618 AGP_FREE_MEMORY(dev, mem);
619 return 0;
620 } else {
621 return ENOENT;
622 }
623}
624
625static int
626agp_bind_user(device_t dev, agp_bind *bind)
627{
628 struct agp_memory *mem = agp_find_memory(dev, bind->key);
629
630 if (!mem)
631 return ENOENT;
632
633 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
634}
635
636static int
637agp_unbind_user(device_t dev, agp_unbind *unbind)
638{
639 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
640
641 if (!mem)
642 return ENOENT;
643
644 return AGP_UNBIND_MEMORY(dev, mem);
645}
646
647static int
648agp_open(dev_t kdev, int oflags, int devtype, struct proc *p)
649{
650 device_t dev = KDEV2DEV(kdev);
651 struct agp_softc *sc = device_get_softc(dev);
652
653 if (!sc->as_isopen) {
654 sc->as_isopen = 1;
655 device_busy(dev);
656 }
657
658 return 0;
659}
660
661static int
662agp_close(dev_t kdev, int fflag, int devtype, struct proc *p)
663{
664 device_t dev = KDEV2DEV(kdev);
665 struct agp_softc *sc = device_get_softc(dev);
666
667 /*
668 * Clear the GATT and force release on last close
669 */
670 if (sc->as_state == AGP_ACQUIRE_USER)
671 agp_release_helper(dev, AGP_ACQUIRE_USER);
672 sc->as_isopen = 0;
673 device_unbusy(dev);
674
675 return 0;
676}
677
678static int
679agp_ioctl(dev_t kdev, u_long cmd, caddr_t data, int fflag, struct proc *p)
680{
681 device_t dev = KDEV2DEV(kdev);
682
683 switch (cmd) {
684 case AGPIOC_INFO:
685 return agp_info_user(dev, (agp_info *) data);
686
687 case AGPIOC_ACQUIRE:
688 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
689
690 case AGPIOC_RELEASE:
691 return agp_release_helper(dev, AGP_ACQUIRE_USER);
692
693 case AGPIOC_SETUP:
694 return agp_setup_user(dev, (agp_setup *)data);
695
696 case AGPIOC_ALLOCATE:
697 return agp_allocate_user(dev, (agp_allocate *)data);
698
699 case AGPIOC_DEALLOCATE:
700 return agp_deallocate_user(dev, *(int *) data);
701
702 case AGPIOC_BIND:
703 return agp_bind_user(dev, (agp_bind *)data);
704
705 case AGPIOC_UNBIND:
706 return agp_unbind_user(dev, (agp_unbind *)data);
707
708 }
709
710 return EINVAL;
711}
712
713static int
714agp_mmap(dev_t kdev, vm_offset_t offset, int prot)
715{
716 device_t dev = KDEV2DEV(kdev);
717 struct agp_softc *sc = device_get_softc(dev);
718
719 if (offset > AGP_GET_APERTURE(dev))
720 return -1;
721 return atop(rman_get_start(sc->as_aperture) + offset);
722}
723
724/* Implementation of the kernel api */
725
726device_t
727agp_find_device()
728{
729 if (!agp_devclass)
730 return 0;
731 return devclass_get_device(agp_devclass, 0);
732}
733
734enum agp_acquire_state
735agp_state(device_t dev)
736{
737 struct agp_softc *sc = device_get_softc(dev);
738 return sc->as_state;
739}
740
741void
742agp_get_info(device_t dev, struct agp_info *info)
743{
744 struct agp_softc *sc = device_get_softc(dev);
745
746 info->ai_mode =
747 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
748 info->ai_aperture_base = rman_get_start(sc->as_aperture);
749 info->ai_aperture_size = (rman_get_end(sc->as_aperture)
750 - rman_get_start(sc->as_aperture)) + 1;
751 info->ai_memory_allowed = sc->as_maxmem;
752 info->ai_memory_used = sc->as_allocated;
753}
754
755int
756agp_acquire(device_t dev)
757{
758 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
759}
760
761int
762agp_release(device_t dev)
763{
764 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
765}
766
767int
768agp_enable(device_t dev, u_int32_t mode)
769{
770 return AGP_ENABLE(dev, mode);
771}
772
773void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
774{
775 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
776}
777
778void agp_free_memory(device_t dev, void *handle)
779{
780 struct agp_memory *mem = (struct agp_memory *) handle;
781 AGP_FREE_MEMORY(dev, mem);
782}
783
784int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
785{
786 struct agp_memory *mem = (struct agp_memory *) handle;
787 return AGP_BIND_MEMORY(dev, mem, offset);
788}
789
790int agp_unbind_memory(device_t dev, void *handle)
791{
792 struct agp_memory *mem = (struct agp_memory *) handle;
793 return AGP_UNBIND_MEMORY(dev, mem);
794}
795
796void agp_memory_info(device_t dev, void *handle, struct
797 agp_memory_info *mi)
798{
799 struct agp_memory *mem = (struct agp_memory *) handle;
800
801 mi->ami_size = mem->am_size;
802 mi->ami_physical = mem->am_physical;
803 mi->ami_offset = mem->am_offset;
804 mi->ami_is_bound = mem->am_is_bound;
805}
2 * Copyright (c) 2000 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/agp/agp.c 66615 2000-10-04 01:29:17Z jasone $
27 */
28
29#include "opt_bus.h"
30#include "opt_pci.h"
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/malloc.h>
35#include <sys/kernel.h>
36#include <sys/bus.h>
37#include <sys/conf.h>
38#include <sys/ioccom.h>
39#include <sys/agpio.h>
40#include <sys/lock.h>
41#include <sys/proc.h>
42
43#include <pci/pcivar.h>
44#include <pci/pcireg.h>
45#include <pci/agppriv.h>
46#include <pci/agpvar.h>
47#include <pci/agpreg.h>
48
49#include <vm/vm.h>
50#include <vm/vm_object.h>
51#include <vm/vm_page.h>
52#include <vm/vm_pageout.h>
53#include <vm/pmap.h>
54
55#include <machine/md_var.h>
56#include <machine/bus.h>
57#include <machine/resource.h>
58#include <sys/rman.h>
59
60MODULE_VERSION(agp, 1);
61
62MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
63
64#define CDEV_MAJOR 148
65 /* agp_drv.c */
66static d_open_t agp_open;
67static d_close_t agp_close;
68static d_ioctl_t agp_ioctl;
69static d_mmap_t agp_mmap;
70
71static struct cdevsw agp_cdevsw = {
72 /* open */ agp_open,
73 /* close */ agp_close,
74 /* read */ noread,
75 /* write */ nowrite,
76 /* ioctl */ agp_ioctl,
77 /* poll */ nopoll,
78 /* mmap */ agp_mmap,
79 /* strategy */ nostrategy,
80 /* name */ "agp",
81 /* maj */ CDEV_MAJOR,
82 /* dump */ nodump,
83 /* psize */ nopsize,
84 /* flags */ D_TTY,
85 /* bmaj */ -1
86};
87
88static devclass_t agp_devclass;
89#define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
90
91/* Helper functions for implementing chipset mini drivers. */
92
93void
94agp_flush_cache()
95{
96#ifdef __i386__
97 wbinvd();
98#endif
99}
100
101u_int8_t
102agp_find_caps(device_t dev)
103{
104 u_int32_t status;
105 u_int8_t ptr, next;
106
107 /*
108 * Check the CAP_LIST bit of the PCI status register first.
109 */
110 status = pci_read_config(dev, PCIR_STATUS, 2);
111 if (!(status & 0x10))
112 return 0;
113
114 /*
115 * Traverse the capabilities list.
116 */
117 for (ptr = pci_read_config(dev, AGP_CAPPTR, 1);
118 ptr != 0;
119 ptr = next) {
120 u_int32_t capid = pci_read_config(dev, ptr, 4);
121 next = AGP_CAPID_GET_NEXT_PTR(capid);
122
123 /*
124 * If this capability entry ID is 2, then we are done.
125 */
126 if (AGP_CAPID_GET_CAP_ID(capid) == 2)
127 return ptr;
128 }
129
130 return 0;
131}
132
133/*
134 * Find an AGP display device (if any).
135 */
136static device_t
137agp_find_display(void)
138{
139 devclass_t pci = devclass_find("pci");
140 device_t bus, dev = 0;
141 device_t *kids;
142 int busnum, numkids, i;
143
144 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
145 bus = devclass_get_device(pci, busnum);
146 if (!bus)
147 continue;
148 device_get_children(bus, &kids, &numkids);
149 for (i = 0; i < numkids; i++) {
150 dev = kids[i];
151 if (pci_get_class(dev) == PCIC_DISPLAY
152 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
153 if (agp_find_caps(dev)) {
154 free(kids, M_TEMP);
155 return dev;
156 }
157
158 }
159 free(kids, M_TEMP);
160 }
161
162 return 0;
163}
164
165struct agp_gatt *
166agp_alloc_gatt(device_t dev)
167{
168 u_int32_t apsize = AGP_GET_APERTURE(dev);
169 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
170 struct agp_gatt *gatt;
171
172 if (bootverbose)
173 device_printf(dev,
174 "allocating GATT for aperture of size %dM\n",
175 apsize / (1024*1024));
176
177 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
178 if (!gatt)
179 return 0;
180
181 gatt->ag_entries = entries;
182 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP, 0,
183 0, ~0, PAGE_SIZE, 0);
184 if (!gatt->ag_virtual) {
185 if (bootverbose)
186 device_printf(dev, "contiguous allocation failed\n");
187 free(gatt, M_AGP);
188 return 0;
189 }
190 bzero(gatt->ag_virtual, entries * sizeof(u_int32_t));
191 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
192 agp_flush_cache();
193
194 return gatt;
195}
196
197void
198agp_free_gatt(struct agp_gatt *gatt)
199{
200 contigfree(gatt->ag_virtual,
201 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
202 free(gatt, M_AGP);
203}
204
205static int agp_max[][2] = {
206 {0, 0},
207 {32, 4},
208 {64, 28},
209 {128, 96},
210 {256, 204},
211 {512, 440},
212 {1024, 942},
213 {2048, 1920},
214 {4096, 3932}
215};
216#define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
217
218int
219agp_generic_attach(device_t dev)
220{
221 struct agp_softc *sc = device_get_softc(dev);
222 int rid, memsize, i;
223
224 /*
225 * Find and map the aperture.
226 */
227 rid = AGP_APBASE;
228 sc->as_aperture = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
229 0, ~0, 1, RF_ACTIVE);
230 if (!sc->as_aperture)
231 return ENOMEM;
232
233 /*
234 * Work out an upper bound for agp memory allocation. This
235 * uses a heurisitc table from the Linux driver.
236 */
237 memsize = ptoa(Maxmem) >> 20;
238 for (i = 0; i < agp_max_size; i++) {
239 if (memsize <= agp_max[i][0])
240 break;
241 }
242 if (i == agp_max_size) i = agp_max_size - 1;
243 sc->as_maxmem = agp_max[i][1] << 20U;
244
245 /*
246 * The lock is used to prevent re-entry to
247 * agp_generic_bind_memory() since that function can sleep.
248 */
249 lockinit(&sc->as_lock, PZERO|PCATCH, "agplk", 0, 0);
250
251 /*
252 * Initialise stuff for the userland device.
253 */
254 agp_devclass = devclass_find("agp");
255 TAILQ_INIT(&sc->as_memory);
256 sc->as_nextid = 1;
257
258 sc->as_devnode = make_dev(&agp_cdevsw,
259 device_get_unit(dev),
260 UID_ROOT,
261 GID_WHEEL,
262 0600,
263 "agpgart");
264
265 return 0;
266}
267
268int
269agp_generic_detach(device_t dev)
270{
271 struct agp_softc *sc = device_get_softc(dev);
272 bus_release_resource(dev, SYS_RES_MEMORY, AGP_APBASE, sc->as_aperture);
273 lockmgr(&sc->as_lock, LK_DRAIN, 0, curproc);
274 lockdestroy(&sc->as_lock);
275 destroy_dev(sc->as_devnode);
276 agp_flush_cache();
277 return 0;
278}
279
280int
281agp_generic_enable(device_t dev, u_int32_t mode)
282{
283 device_t mdev = agp_find_display();
284 u_int32_t tstatus, mstatus;
285 u_int32_t command;
286 int rq, sba, fw, rate;;
287
288 if (!mdev) {
289 AGP_DPF("can't find display\n");
290 return ENXIO;
291 }
292
293 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
294 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
295
296 /* Set RQ to the min of mode, tstatus and mstatus */
297 rq = AGP_MODE_GET_RQ(mode);
298 if (AGP_MODE_GET_RQ(tstatus) < rq)
299 rq = AGP_MODE_GET_RQ(tstatus);
300 if (AGP_MODE_GET_RQ(mstatus) < rq)
301 rq = AGP_MODE_GET_RQ(mstatus);
302
303 /* Set SBA if all three can deal with SBA */
304 sba = (AGP_MODE_GET_SBA(tstatus)
305 & AGP_MODE_GET_SBA(mstatus)
306 & AGP_MODE_GET_SBA(mode));
307
308 /* Similar for FW */
309 fw = (AGP_MODE_GET_FW(tstatus)
310 & AGP_MODE_GET_FW(mstatus)
311 & AGP_MODE_GET_FW(mode));
312
313 /* Figure out the max rate */
314 rate = (AGP_MODE_GET_RATE(tstatus)
315 & AGP_MODE_GET_RATE(mstatus)
316 & AGP_MODE_GET_RATE(mode));
317 if (rate & AGP_MODE_RATE_4x)
318 rate = AGP_MODE_RATE_4x;
319 else if (rate & AGP_MODE_RATE_2x)
320 rate = AGP_MODE_RATE_2x;
321 else
322 rate = AGP_MODE_RATE_1x;
323
324 /* Construct the new mode word and tell the hardware */
325 command = AGP_MODE_SET_RQ(0, rq);
326 command = AGP_MODE_SET_SBA(command, sba);
327 command = AGP_MODE_SET_FW(command, fw);
328 command = AGP_MODE_SET_RATE(command, rate);
329 command = AGP_MODE_SET_AGP(command, 1);
330 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
331 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
332
333 return 0;
334}
335
336struct agp_memory *
337agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
338{
339 struct agp_softc *sc = device_get_softc(dev);
340 struct agp_memory *mem;
341
342 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
343 return 0;
344
345 if (sc->as_allocated + size > sc->as_maxmem)
346 return 0;
347
348 if (type != 0) {
349 printf("agp_generic_alloc_memory: unsupported type %d\n",
350 type);
351 return 0;
352 }
353
354 mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
355 mem->am_id = sc->as_nextid++;
356 mem->am_size = size;
357 mem->am_type = 0;
358 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
359 mem->am_physical = 0;
360 mem->am_offset = 0;
361 mem->am_is_bound = 0;
362 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
363 sc->as_allocated += size;
364
365 return mem;
366}
367
368int
369agp_generic_free_memory(device_t dev, struct agp_memory *mem)
370{
371 struct agp_softc *sc = device_get_softc(dev);
372
373 if (mem->am_is_bound)
374 return EBUSY;
375
376 sc->as_allocated -= mem->am_size;
377 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
378 vm_object_deallocate(mem->am_obj);
379 free(mem, M_AGP);
380 return 0;
381}
382
383int
384agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
385 vm_offset_t offset)
386{
387 struct agp_softc *sc = device_get_softc(dev);
388 vm_offset_t i, j, k;
389 vm_page_t m;
390 int error;
391
392 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curproc);
393
394 if (mem->am_is_bound) {
395 device_printf(dev, "memory already bound\n");
396 return EINVAL;
397 }
398
399 if (offset < 0
400 || (offset & (AGP_PAGE_SIZE - 1)) != 0
401 || offset + mem->am_size > AGP_GET_APERTURE(dev)) {
402 device_printf(dev, "binding memory at bad offset %#x\n",
403 (int) offset);
404 return EINVAL;
405 }
406
407 /*
408 * Bind the individual pages and flush the chipset's
409 * TLB.
410 *
411 * XXX Presumably, this needs to be the pci address on alpha
412 * (i.e. use alpha_XXX_dmamap()). I don't have access to any
413 * alpha AGP hardware to check.
414 */
415 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
416 /*
417 * Find a page from the object and wire it
418 * down. This page will be mapped using one or more
419 * entries in the GATT (assuming that PAGE_SIZE >=
420 * AGP_PAGE_SIZE. If this is the first call to bind,
421 * the pages will be allocated and zeroed.
422 */
423 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
424 VM_ALLOC_ZERO | VM_ALLOC_RETRY);
425 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
426 vm_page_wire(m);
427
428 /*
429 * Install entries in the GATT, making sure that if
430 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
431 * aligned to PAGE_SIZE, we don't modify too many GATT
432 * entries.
433 */
434 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
435 j += AGP_PAGE_SIZE) {
436 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
437 AGP_DPF("binding offset %#x to pa %#x\n",
438 offset + i + j, pa);
439 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
440 if (error) {
441 /*
442 * Bail out. Reverse all the mappings
443 * and unwire the pages.
444 */
445 vm_page_wakeup(m);
446 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
447 AGP_UNBIND_PAGE(dev, offset + k);
448 for (k = 0; k <= i; k += PAGE_SIZE) {
449 m = vm_page_lookup(mem->am_obj,
450 OFF_TO_IDX(k));
451 vm_page_unwire(m, 0);
452 }
453 lockmgr(&sc->as_lock, LK_RELEASE, 0, curproc);
454 return error;
455 }
456 }
457 vm_page_wakeup(m);
458 }
459
460 /*
461 * Flush the cpu cache since we are providing a new mapping
462 * for these pages.
463 */
464 agp_flush_cache();
465
466 /*
467 * Make sure the chipset gets the new mappings.
468 */
469 AGP_FLUSH_TLB(dev);
470
471 mem->am_offset = offset;
472 mem->am_is_bound = 1;
473
474 lockmgr(&sc->as_lock, LK_RELEASE, 0, curproc);
475
476 return 0;
477}
478
479int
480agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
481{
482 struct agp_softc *sc = device_get_softc(dev);
483 vm_page_t m;
484 int i;
485
486 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curproc);
487
488 if (!mem->am_is_bound) {
489 device_printf(dev, "memory is not bound\n");
490 return EINVAL;
491 }
492
493
494 /*
495 * Unbind the individual pages and flush the chipset's
496 * TLB. Unwire the pages so they can be swapped.
497 */
498 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
499 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
500 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
501 m = vm_page_lookup(mem->am_obj, atop(i));
502 vm_page_unwire(m, 0);
503 }
504
505 agp_flush_cache();
506 AGP_FLUSH_TLB(dev);
507
508 mem->am_offset = 0;
509 mem->am_is_bound = 0;
510
511 lockmgr(&sc->as_lock, LK_RELEASE, 0, curproc);
512
513 return 0;
514}
515
516/* Helper functions for implementing user/kernel api */
517
518static int
519agp_acquire_helper(device_t dev, enum agp_acquire_state state)
520{
521 struct agp_softc *sc = device_get_softc(dev);
522
523 if (sc->as_state != AGP_ACQUIRE_FREE)
524 return EBUSY;
525 sc->as_state = state;
526
527 return 0;
528}
529
530static int
531agp_release_helper(device_t dev, enum agp_acquire_state state)
532{
533 struct agp_softc *sc = device_get_softc(dev);
534 struct agp_memory *mem;
535
536 if (sc->as_state == AGP_ACQUIRE_FREE)
537 return 0;
538
539 if (sc->as_state != state)
540 return EBUSY;
541
542 /*
543 * Clear out the aperture and free any outstanding memory blocks.
544 */
545 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
546 if (mem->am_is_bound)
547 AGP_UNBIND_MEMORY(dev, mem);
548 AGP_FREE_MEMORY(dev, mem);
549 }
550
551 sc->as_state = AGP_ACQUIRE_FREE;
552 return 0;
553}
554
555static struct agp_memory *
556agp_find_memory(device_t dev, int id)
557{
558 struct agp_softc *sc = device_get_softc(dev);
559 struct agp_memory *mem;
560
561 AGP_DPF("searching for memory block %d\n", id);
562 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
563 AGP_DPF("considering memory block %d\n", mem->am_id);
564 if (mem->am_id == id)
565 return mem;
566 }
567 return 0;
568}
569
570/* Implementation of the userland ioctl api */
571
572static int
573agp_info_user(device_t dev, agp_info *info)
574{
575 struct agp_softc *sc = device_get_softc(dev);
576
577 bzero(info, sizeof *info);
578 info->bridge_id = pci_get_devid(dev);
579 info->agp_mode =
580 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
581 info->aper_base = rman_get_start(sc->as_aperture);
582 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
583 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
584 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
585
586 return 0;
587}
588
589static int
590agp_setup_user(device_t dev, agp_setup *setup)
591{
592 return AGP_ENABLE(dev, setup->agp_mode);
593}
594
595static int
596agp_allocate_user(device_t dev, agp_allocate *alloc)
597{
598 struct agp_memory *mem;
599
600 mem = AGP_ALLOC_MEMORY(dev,
601 alloc->type,
602 alloc->pg_count << AGP_PAGE_SHIFT);
603 if (mem) {
604 alloc->key = mem->am_id;
605 alloc->physical = mem->am_physical;
606 return 0;
607 } else {
608 return ENOMEM;
609 }
610}
611
612static int
613agp_deallocate_user(device_t dev, int id)
614{
615 struct agp_memory *mem = agp_find_memory(dev, id);;
616
617 if (mem) {
618 AGP_FREE_MEMORY(dev, mem);
619 return 0;
620 } else {
621 return ENOENT;
622 }
623}
624
625static int
626agp_bind_user(device_t dev, agp_bind *bind)
627{
628 struct agp_memory *mem = agp_find_memory(dev, bind->key);
629
630 if (!mem)
631 return ENOENT;
632
633 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
634}
635
636static int
637agp_unbind_user(device_t dev, agp_unbind *unbind)
638{
639 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
640
641 if (!mem)
642 return ENOENT;
643
644 return AGP_UNBIND_MEMORY(dev, mem);
645}
646
647static int
648agp_open(dev_t kdev, int oflags, int devtype, struct proc *p)
649{
650 device_t dev = KDEV2DEV(kdev);
651 struct agp_softc *sc = device_get_softc(dev);
652
653 if (!sc->as_isopen) {
654 sc->as_isopen = 1;
655 device_busy(dev);
656 }
657
658 return 0;
659}
660
661static int
662agp_close(dev_t kdev, int fflag, int devtype, struct proc *p)
663{
664 device_t dev = KDEV2DEV(kdev);
665 struct agp_softc *sc = device_get_softc(dev);
666
667 /*
668 * Clear the GATT and force release on last close
669 */
670 if (sc->as_state == AGP_ACQUIRE_USER)
671 agp_release_helper(dev, AGP_ACQUIRE_USER);
672 sc->as_isopen = 0;
673 device_unbusy(dev);
674
675 return 0;
676}
677
678static int
679agp_ioctl(dev_t kdev, u_long cmd, caddr_t data, int fflag, struct proc *p)
680{
681 device_t dev = KDEV2DEV(kdev);
682
683 switch (cmd) {
684 case AGPIOC_INFO:
685 return agp_info_user(dev, (agp_info *) data);
686
687 case AGPIOC_ACQUIRE:
688 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
689
690 case AGPIOC_RELEASE:
691 return agp_release_helper(dev, AGP_ACQUIRE_USER);
692
693 case AGPIOC_SETUP:
694 return agp_setup_user(dev, (agp_setup *)data);
695
696 case AGPIOC_ALLOCATE:
697 return agp_allocate_user(dev, (agp_allocate *)data);
698
699 case AGPIOC_DEALLOCATE:
700 return agp_deallocate_user(dev, *(int *) data);
701
702 case AGPIOC_BIND:
703 return agp_bind_user(dev, (agp_bind *)data);
704
705 case AGPIOC_UNBIND:
706 return agp_unbind_user(dev, (agp_unbind *)data);
707
708 }
709
710 return EINVAL;
711}
712
713static int
714agp_mmap(dev_t kdev, vm_offset_t offset, int prot)
715{
716 device_t dev = KDEV2DEV(kdev);
717 struct agp_softc *sc = device_get_softc(dev);
718
719 if (offset > AGP_GET_APERTURE(dev))
720 return -1;
721 return atop(rman_get_start(sc->as_aperture) + offset);
722}
723
724/* Implementation of the kernel api */
725
726device_t
727agp_find_device()
728{
729 if (!agp_devclass)
730 return 0;
731 return devclass_get_device(agp_devclass, 0);
732}
733
734enum agp_acquire_state
735agp_state(device_t dev)
736{
737 struct agp_softc *sc = device_get_softc(dev);
738 return sc->as_state;
739}
740
741void
742agp_get_info(device_t dev, struct agp_info *info)
743{
744 struct agp_softc *sc = device_get_softc(dev);
745
746 info->ai_mode =
747 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
748 info->ai_aperture_base = rman_get_start(sc->as_aperture);
749 info->ai_aperture_size = (rman_get_end(sc->as_aperture)
750 - rman_get_start(sc->as_aperture)) + 1;
751 info->ai_memory_allowed = sc->as_maxmem;
752 info->ai_memory_used = sc->as_allocated;
753}
754
755int
756agp_acquire(device_t dev)
757{
758 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
759}
760
761int
762agp_release(device_t dev)
763{
764 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
765}
766
767int
768agp_enable(device_t dev, u_int32_t mode)
769{
770 return AGP_ENABLE(dev, mode);
771}
772
773void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
774{
775 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
776}
777
778void agp_free_memory(device_t dev, void *handle)
779{
780 struct agp_memory *mem = (struct agp_memory *) handle;
781 AGP_FREE_MEMORY(dev, mem);
782}
783
784int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
785{
786 struct agp_memory *mem = (struct agp_memory *) handle;
787 return AGP_BIND_MEMORY(dev, mem, offset);
788}
789
790int agp_unbind_memory(device_t dev, void *handle)
791{
792 struct agp_memory *mem = (struct agp_memory *) handle;
793 return AGP_UNBIND_MEMORY(dev, mem);
794}
795
796void agp_memory_info(device_t dev, void *handle, struct
797 agp_memory_info *mi)
798{
799 struct agp_memory *mem = (struct agp_memory *) handle;
800
801 mi->ami_size = mem->am_size;
802 mi->ami_physical = mem->am_physical;
803 mi->ami_offset = mem->am_offset;
804 mi->ami_is_bound = mem->am_is_bound;
805}