* Merge fixes from libc to libcr.
[dragonfly.git] / sys / dev / agp / agp.c
CommitLineData
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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: src/sys/pci/agp.c,v 1.3.2.4 2002/08/11 19:58:12 alc Exp $
1f2de5d4 27 * $DragonFly: src/sys/dev/agp/agp.c,v 1.7 2003/08/07 21:16:48 dillon Exp $
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28 */
29
30#include "opt_bus.h"
31#include "opt_pci.h"
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/malloc.h>
36#include <sys/kernel.h>
37#include <sys/bus.h>
38#include <sys/conf.h>
39#include <sys/ioccom.h>
40#include <sys/agpio.h>
41#include <sys/lock.h>
42#include <sys/proc.h>
43
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44#include <bus/pci/pcivar.h>
45#include <bus/pci/pcireg.h>
46#include "agppriv.h"
47#include "agpvar.h"
48#include "agpreg.h"
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49
50#include <vm/vm.h>
51#include <vm/vm_object.h>
52#include <vm/vm_page.h>
53#include <vm/vm_pageout.h>
54#include <vm/pmap.h>
55
56#include <machine/md_var.h>
57#include <machine/bus.h>
58#include <machine/resource.h>
59#include <sys/rman.h>
60
61MODULE_VERSION(agp, 1);
62
63MALLOC_DEFINE(M_AGP, "agp", "AGP data structures");
64
65#define CDEV_MAJOR 148
66 /* agp_drv.c */
67static d_open_t agp_open;
68static d_close_t agp_close;
69static d_ioctl_t agp_ioctl;
70static d_mmap_t agp_mmap;
71
72static struct cdevsw agp_cdevsw = {
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73 /* name */ "agp",
74 /* maj */ CDEV_MAJOR,
75 /* flags */ D_TTY,
76 /* port */ NULL,
77 /* autoq */ 0,
78
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79 /* open */ agp_open,
80 /* close */ agp_close,
81 /* read */ noread,
82 /* write */ nowrite,
83 /* ioctl */ agp_ioctl,
84 /* poll */ nopoll,
85 /* mmap */ agp_mmap,
86 /* strategy */ nostrategy,
984263bc 87 /* dump */ nodump,
fabb8ceb 88 /* psize */ nopsize
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89};
90
91static devclass_t agp_devclass;
92#define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
93
94/* Helper functions for implementing chipset mini drivers. */
95
96void
97agp_flush_cache()
98{
99#ifdef __i386__
100 wbinvd();
101#endif
102}
103
104u_int8_t
105agp_find_caps(device_t dev)
106{
107 u_int32_t status;
108 u_int8_t ptr, next;
109
110 /*
111 * Check the CAP_LIST bit of the PCI status register first.
112 */
113 status = pci_read_config(dev, PCIR_STATUS, 2);
114 if (!(status & 0x10))
115 return 0;
116
117 /*
118 * Traverse the capabilities list.
119 */
120 for (ptr = pci_read_config(dev, AGP_CAPPTR, 1);
121 ptr != 0;
122 ptr = next) {
123 u_int32_t capid = pci_read_config(dev, ptr, 4);
124 next = AGP_CAPID_GET_NEXT_PTR(capid);
125
126 /*
127 * If this capability entry ID is 2, then we are done.
128 */
129 if (AGP_CAPID_GET_CAP_ID(capid) == 2)
130 return ptr;
131 }
132
133 return 0;
134}
135
136/*
137 * Find an AGP display device (if any).
138 */
139static device_t
140agp_find_display(void)
141{
142 devclass_t pci = devclass_find("pci");
143 device_t bus, dev = 0;
144 device_t *kids;
145 int busnum, numkids, i;
146
147 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
148 bus = devclass_get_device(pci, busnum);
149 if (!bus)
150 continue;
151 device_get_children(bus, &kids, &numkids);
152 for (i = 0; i < numkids; i++) {
153 dev = kids[i];
154 if (pci_get_class(dev) == PCIC_DISPLAY
155 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
156 if (agp_find_caps(dev)) {
157 free(kids, M_TEMP);
158 return dev;
159 }
160
161 }
162 free(kids, M_TEMP);
163 }
164
165 return 0;
166}
167
168struct agp_gatt *
169agp_alloc_gatt(device_t dev)
170{
171 u_int32_t apsize = AGP_GET_APERTURE(dev);
172 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
173 struct agp_gatt *gatt;
174
175 if (bootverbose)
176 device_printf(dev,
177 "allocating GATT for aperture of size %dM\n",
178 apsize / (1024*1024));
179
180 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
181 if (!gatt)
182 return 0;
183
184 gatt->ag_entries = entries;
185 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP, 0,
186 0, ~0, PAGE_SIZE, 0);
187 if (!gatt->ag_virtual) {
188 if (bootverbose)
189 device_printf(dev, "contiguous allocation failed\n");
190 free(gatt, M_AGP);
191 return 0;
192 }
193 bzero(gatt->ag_virtual, entries * sizeof(u_int32_t));
194 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
195 agp_flush_cache();
196
197 return gatt;
198}
199
200void
201agp_free_gatt(struct agp_gatt *gatt)
202{
203 contigfree(gatt->ag_virtual,
204 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
205 free(gatt, M_AGP);
206}
207
208static int agp_max[][2] = {
209 {0, 0},
210 {32, 4},
211 {64, 28},
212 {128, 96},
213 {256, 204},
214 {512, 440},
215 {1024, 942},
216 {2048, 1920},
217 {4096, 3932}
218};
219#define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
220
221int
222agp_generic_attach(device_t dev)
223{
224 struct agp_softc *sc = device_get_softc(dev);
225 int rid, memsize, i;
226
227 /*
228 * Find and map the aperture.
229 */
230 rid = AGP_APBASE;
231 sc->as_aperture = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
232 0, ~0, 1, RF_ACTIVE);
233 if (!sc->as_aperture)
234 return ENOMEM;
235
236 /*
237 * Work out an upper bound for agp memory allocation. This
238 * uses a heurisitc table from the Linux driver.
239 */
240 memsize = ptoa(Maxmem) >> 20;
241 for (i = 0; i < agp_max_size; i++) {
242 if (memsize <= agp_max[i][0])
243 break;
244 }
245 if (i == agp_max_size) i = agp_max_size - 1;
246 sc->as_maxmem = agp_max[i][1] << 20U;
247
248 /*
249 * The lock is used to prevent re-entry to
250 * agp_generic_bind_memory() since that function can sleep.
251 */
377d4740 252 lockinit(&sc->as_lock, PCATCH, "agplk", 0, 0);
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253
254 /*
255 * Initialise stuff for the userland device.
256 */
257 agp_devclass = devclass_find("agp");
258 TAILQ_INIT(&sc->as_memory);
259 sc->as_nextid = 1;
260
261 sc->as_devnode = make_dev(&agp_cdevsw,
262 device_get_unit(dev),
263 UID_ROOT,
264 GID_WHEEL,
265 0600,
266 "agpgart");
267
268 return 0;
269}
270
271int
272agp_generic_detach(device_t dev)
273{
274 struct agp_softc *sc = device_get_softc(dev);
275 bus_release_resource(dev, SYS_RES_MEMORY, AGP_APBASE, sc->as_aperture);
dadab5e9 276 lockmgr(&sc->as_lock, LK_DRAIN, 0, curthread); /* XXX */
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277 destroy_dev(sc->as_devnode);
278 agp_flush_cache();
279 return 0;
280}
281
282int
283agp_generic_enable(device_t dev, u_int32_t mode)
284{
285 device_t mdev = agp_find_display();
286 u_int32_t tstatus, mstatus;
287 u_int32_t command;
288 int rq, sba, fw, rate;;
289
290 if (!mdev) {
291 AGP_DPF("can't find display\n");
292 return ENXIO;
293 }
294
295 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
296 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4);
297
298 /* Set RQ to the min of mode, tstatus and mstatus */
299 rq = AGP_MODE_GET_RQ(mode);
300 if (AGP_MODE_GET_RQ(tstatus) < rq)
301 rq = AGP_MODE_GET_RQ(tstatus);
302 if (AGP_MODE_GET_RQ(mstatus) < rq)
303 rq = AGP_MODE_GET_RQ(mstatus);
304
305 /* Set SBA if all three can deal with SBA */
306 sba = (AGP_MODE_GET_SBA(tstatus)
307 & AGP_MODE_GET_SBA(mstatus)
308 & AGP_MODE_GET_SBA(mode));
309
310 /* Similar for FW */
311 fw = (AGP_MODE_GET_FW(tstatus)
312 & AGP_MODE_GET_FW(mstatus)
313 & AGP_MODE_GET_FW(mode));
314
315 /* Figure out the max rate */
316 rate = (AGP_MODE_GET_RATE(tstatus)
317 & AGP_MODE_GET_RATE(mstatus)
318 & AGP_MODE_GET_RATE(mode));
319 if (rate & AGP_MODE_RATE_4x)
320 rate = AGP_MODE_RATE_4x;
321 else if (rate & AGP_MODE_RATE_2x)
322 rate = AGP_MODE_RATE_2x;
323 else
324 rate = AGP_MODE_RATE_1x;
325
326 /* Construct the new mode word and tell the hardware */
327 command = AGP_MODE_SET_RQ(0, rq);
328 command = AGP_MODE_SET_SBA(command, sba);
329 command = AGP_MODE_SET_FW(command, fw);
330 command = AGP_MODE_SET_RATE(command, rate);
331 command = AGP_MODE_SET_AGP(command, 1);
332 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4);
333 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4);
334
335 return 0;
336}
337
338struct agp_memory *
339agp_generic_alloc_memory(device_t dev, int type, vm_size_t size)
340{
341 struct agp_softc *sc = device_get_softc(dev);
342 struct agp_memory *mem;
343
344 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
345 return 0;
346
347 if (sc->as_allocated + size > sc->as_maxmem)
348 return 0;
349
350 if (type != 0) {
351 printf("agp_generic_alloc_memory: unsupported type %d\n",
352 type);
353 return 0;
354 }
355
356 mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
357 mem->am_id = sc->as_nextid++;
358 mem->am_size = size;
359 mem->am_type = 0;
360 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size)));
361 mem->am_physical = 0;
362 mem->am_offset = 0;
363 mem->am_is_bound = 0;
364 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link);
365 sc->as_allocated += size;
366
367 return mem;
368}
369
370int
371agp_generic_free_memory(device_t dev, struct agp_memory *mem)
372{
373 struct agp_softc *sc = device_get_softc(dev);
374
375 if (mem->am_is_bound)
376 return EBUSY;
377
378 sc->as_allocated -= mem->am_size;
379 TAILQ_REMOVE(&sc->as_memory, mem, am_link);
380 vm_object_deallocate(mem->am_obj);
381 free(mem, M_AGP);
382 return 0;
383}
384
385int
386agp_generic_bind_memory(device_t dev, struct agp_memory *mem,
387 vm_offset_t offset)
388{
389 struct agp_softc *sc = device_get_softc(dev);
390 vm_offset_t i, j, k;
391 vm_page_t m;
392 int error;
393
dadab5e9 394 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curthread); /* XXX */
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395
396 if (mem->am_is_bound) {
397 device_printf(dev, "memory already bound\n");
398 return EINVAL;
399 }
400
401 if (offset < 0
402 || (offset & (AGP_PAGE_SIZE - 1)) != 0
403 || offset + mem->am_size > AGP_GET_APERTURE(dev)) {
404 device_printf(dev, "binding memory at bad offset %#x\n",
405 (int) offset);
406 return EINVAL;
407 }
408
409 /*
410 * Bind the individual pages and flush the chipset's
411 * TLB.
412 *
413 * XXX Presumably, this needs to be the pci address on alpha
414 * (i.e. use alpha_XXX_dmamap()). I don't have access to any
415 * alpha AGP hardware to check.
416 */
417 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
418 /*
419 * Find a page from the object and wire it
420 * down. This page will be mapped using one or more
421 * entries in the GATT (assuming that PAGE_SIZE >=
422 * AGP_PAGE_SIZE. If this is the first call to bind,
423 * the pages will be allocated and zeroed.
424 */
425 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i),
426 VM_ALLOC_ZERO | VM_ALLOC_RETRY);
427 if ((m->flags & PG_ZERO) == 0)
428 vm_page_zero_fill(m);
429 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
430 vm_page_wire(m);
431
432 /*
433 * Install entries in the GATT, making sure that if
434 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
435 * aligned to PAGE_SIZE, we don't modify too many GATT
436 * entries.
437 */
438 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
439 j += AGP_PAGE_SIZE) {
440 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
441 AGP_DPF("binding offset %#x to pa %#x\n",
442 offset + i + j, pa);
443 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
444 if (error) {
445 /*
446 * Bail out. Reverse all the mappings
447 * and unwire the pages.
448 */
449 vm_page_wakeup(m);
450 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
451 AGP_UNBIND_PAGE(dev, offset + k);
452 for (k = 0; k <= i; k += PAGE_SIZE) {
453 m = vm_page_lookup(mem->am_obj,
454 OFF_TO_IDX(k));
455 vm_page_unwire(m, 0);
456 }
dadab5e9 457 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */
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458 return error;
459 }
460 }
461 vm_page_wakeup(m);
462 }
463
464 /*
465 * Flush the cpu cache since we are providing a new mapping
466 * for these pages.
467 */
468 agp_flush_cache();
469
470 /*
471 * Make sure the chipset gets the new mappings.
472 */
473 AGP_FLUSH_TLB(dev);
474
475 mem->am_offset = offset;
476 mem->am_is_bound = 1;
477
dadab5e9 478 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */
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479
480 return 0;
481}
482
483int
484agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
485{
486 struct agp_softc *sc = device_get_softc(dev);
487 vm_page_t m;
488 int i;
489
dadab5e9 490 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curthread); /* XXX */
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491
492 if (!mem->am_is_bound) {
493 device_printf(dev, "memory is not bound\n");
494 return EINVAL;
495 }
496
497
498 /*
499 * Unbind the individual pages and flush the chipset's
500 * TLB. Unwire the pages so they can be swapped.
501 */
502 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
503 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
504 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
505 m = vm_page_lookup(mem->am_obj, atop(i));
506 vm_page_unwire(m, 0);
507 }
508
509 agp_flush_cache();
510 AGP_FLUSH_TLB(dev);
511
512 mem->am_offset = 0;
513 mem->am_is_bound = 0;
514
dadab5e9 515 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */
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516
517 return 0;
518}
519
520/* Helper functions for implementing user/kernel api */
521
522static int
523agp_acquire_helper(device_t dev, enum agp_acquire_state state)
524{
525 struct agp_softc *sc = device_get_softc(dev);
526
527 if (sc->as_state != AGP_ACQUIRE_FREE)
528 return EBUSY;
529 sc->as_state = state;
530
531 return 0;
532}
533
534static int
535agp_release_helper(device_t dev, enum agp_acquire_state state)
536{
537 struct agp_softc *sc = device_get_softc(dev);
538
539 if (sc->as_state == AGP_ACQUIRE_FREE)
540 return 0;
541
542 if (sc->as_state != state)
543 return EBUSY;
544
545 sc->as_state = AGP_ACQUIRE_FREE;
546 return 0;
547}
548
549static struct agp_memory *
550agp_find_memory(device_t dev, int id)
551{
552 struct agp_softc *sc = device_get_softc(dev);
553 struct agp_memory *mem;
554
555 AGP_DPF("searching for memory block %d\n", id);
556 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
557 AGP_DPF("considering memory block %d\n", mem->am_id);
558 if (mem->am_id == id)
559 return mem;
560 }
561 return 0;
562}
563
564/* Implementation of the userland ioctl api */
565
566static int
567agp_info_user(device_t dev, agp_info *info)
568{
569 struct agp_softc *sc = device_get_softc(dev);
570
571 bzero(info, sizeof *info);
572 info->bridge_id = pci_get_devid(dev);
573 info->agp_mode =
574 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
575 info->aper_base = rman_get_start(sc->as_aperture);
576 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
577 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
578 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
579
580 return 0;
581}
582
583static int
584agp_setup_user(device_t dev, agp_setup *setup)
585{
586 return AGP_ENABLE(dev, setup->agp_mode);
587}
588
589static int
590agp_allocate_user(device_t dev, agp_allocate *alloc)
591{
592 struct agp_memory *mem;
593
594 mem = AGP_ALLOC_MEMORY(dev,
595 alloc->type,
596 alloc->pg_count << AGP_PAGE_SHIFT);
597 if (mem) {
598 alloc->key = mem->am_id;
599 alloc->physical = mem->am_physical;
600 return 0;
601 } else {
602 return ENOMEM;
603 }
604}
605
606static int
607agp_deallocate_user(device_t dev, int id)
608{
609 struct agp_memory *mem = agp_find_memory(dev, id);;
610
611 if (mem) {
612 AGP_FREE_MEMORY(dev, mem);
613 return 0;
614 } else {
615 return ENOENT;
616 }
617}
618
619static int
620agp_bind_user(device_t dev, agp_bind *bind)
621{
622 struct agp_memory *mem = agp_find_memory(dev, bind->key);
623
624 if (!mem)
625 return ENOENT;
626
627 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
628}
629
630static int
631agp_unbind_user(device_t dev, agp_unbind *unbind)
632{
633 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
634
635 if (!mem)
636 return ENOENT;
637
638 return AGP_UNBIND_MEMORY(dev, mem);
639}
640
641static int
41c20dac 642agp_open(dev_t kdev, int oflags, int devtype, struct thread *td)
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643{
644 device_t dev = KDEV2DEV(kdev);
645 struct agp_softc *sc = device_get_softc(dev);
646
647 if (!sc->as_isopen) {
648 sc->as_isopen = 1;
649 device_busy(dev);
650 }
651
652 return 0;
653}
654
655static int
41c20dac 656agp_close(dev_t kdev, int fflag, int devtype, struct thread *td)
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657{
658 device_t dev = KDEV2DEV(kdev);
659 struct agp_softc *sc = device_get_softc(dev);
660 struct agp_memory *mem;
661
662 /*
663 * Clear the GATT and force release on last close
664 */
665 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
666 if (mem->am_is_bound)
667 AGP_UNBIND_MEMORY(dev, mem);
668 AGP_FREE_MEMORY(dev, mem);
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
41c20dac 679agp_ioctl(dev_t kdev, u_long cmd, caddr_t data, int fflag, struct thread *td)
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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_aperture_va = (vm_offset_t) rman_get_virtual(sc->as_aperture);
752 info->ai_memory_allowed = sc->as_maxmem;
753 info->ai_memory_used = sc->as_allocated;
754}
755
756int
757agp_acquire(device_t dev)
758{
759 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
760}
761
762int
763agp_release(device_t dev)
764{
765 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
766}
767
768int
769agp_enable(device_t dev, u_int32_t mode)
770{
771 return AGP_ENABLE(dev, mode);
772}
773
774void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
775{
776 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
777}
778
779void agp_free_memory(device_t dev, void *handle)
780{
781 struct agp_memory *mem = (struct agp_memory *) handle;
782 AGP_FREE_MEMORY(dev, mem);
783}
784
785int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
786{
787 struct agp_memory *mem = (struct agp_memory *) handle;
788 return AGP_BIND_MEMORY(dev, mem, offset);
789}
790
791int agp_unbind_memory(device_t dev, void *handle)
792{
793 struct agp_memory *mem = (struct agp_memory *) handle;
794 return AGP_UNBIND_MEMORY(dev, mem);
795}
796
797void agp_memory_info(device_t dev, void *handle, struct
798 agp_memory_info *mi)
799{
800 struct agp_memory *mem = (struct agp_memory *) handle;
801
802 mi->ami_size = mem->am_size;
803 mi->ami_physical = mem->am_physical;
804 mi->ami_offset = mem->am_offset;
805 mi->ami_is_bound = mem->am_is_bound;
806}