proc->thread stage 4: rework the VFS and DEVICE subsystems to take thread
[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 $
dadab5e9 27 * $DragonFly: src/sys/dev/agp/agp.c,v 1.4 2003/06/25 03:56:09 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
44#include <pci/pcivar.h>
45#include <pci/pcireg.h>
46#include <pci/agppriv.h>
47#include <pci/agpvar.h>
48#include <pci/agpreg.h>
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 = {
73 /* open */ agp_open,
74 /* close */ agp_close,
75 /* read */ noread,
76 /* write */ nowrite,
77 /* ioctl */ agp_ioctl,
78 /* poll */ nopoll,
79 /* mmap */ agp_mmap,
80 /* strategy */ nostrategy,
81 /* name */ "agp",
82 /* maj */ CDEV_MAJOR,
83 /* dump */ nodump,
84 /* psize */ nopsize,
85 /* flags */ D_TTY,
86 /* bmaj */ -1
87};
88
89static devclass_t agp_devclass;
90#define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev))
91
92/* Helper functions for implementing chipset mini drivers. */
93
94void
95agp_flush_cache()
96{
97#ifdef __i386__
98 wbinvd();
99#endif
100}
101
102u_int8_t
103agp_find_caps(device_t dev)
104{
105 u_int32_t status;
106 u_int8_t ptr, next;
107
108 /*
109 * Check the CAP_LIST bit of the PCI status register first.
110 */
111 status = pci_read_config(dev, PCIR_STATUS, 2);
112 if (!(status & 0x10))
113 return 0;
114
115 /*
116 * Traverse the capabilities list.
117 */
118 for (ptr = pci_read_config(dev, AGP_CAPPTR, 1);
119 ptr != 0;
120 ptr = next) {
121 u_int32_t capid = pci_read_config(dev, ptr, 4);
122 next = AGP_CAPID_GET_NEXT_PTR(capid);
123
124 /*
125 * If this capability entry ID is 2, then we are done.
126 */
127 if (AGP_CAPID_GET_CAP_ID(capid) == 2)
128 return ptr;
129 }
130
131 return 0;
132}
133
134/*
135 * Find an AGP display device (if any).
136 */
137static device_t
138agp_find_display(void)
139{
140 devclass_t pci = devclass_find("pci");
141 device_t bus, dev = 0;
142 device_t *kids;
143 int busnum, numkids, i;
144
145 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) {
146 bus = devclass_get_device(pci, busnum);
147 if (!bus)
148 continue;
149 device_get_children(bus, &kids, &numkids);
150 for (i = 0; i < numkids; i++) {
151 dev = kids[i];
152 if (pci_get_class(dev) == PCIC_DISPLAY
153 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA)
154 if (agp_find_caps(dev)) {
155 free(kids, M_TEMP);
156 return dev;
157 }
158
159 }
160 free(kids, M_TEMP);
161 }
162
163 return 0;
164}
165
166struct agp_gatt *
167agp_alloc_gatt(device_t dev)
168{
169 u_int32_t apsize = AGP_GET_APERTURE(dev);
170 u_int32_t entries = apsize >> AGP_PAGE_SHIFT;
171 struct agp_gatt *gatt;
172
173 if (bootverbose)
174 device_printf(dev,
175 "allocating GATT for aperture of size %dM\n",
176 apsize / (1024*1024));
177
178 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
179 if (!gatt)
180 return 0;
181
182 gatt->ag_entries = entries;
183 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP, 0,
184 0, ~0, PAGE_SIZE, 0);
185 if (!gatt->ag_virtual) {
186 if (bootverbose)
187 device_printf(dev, "contiguous allocation failed\n");
188 free(gatt, M_AGP);
189 return 0;
190 }
191 bzero(gatt->ag_virtual, entries * sizeof(u_int32_t));
192 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
193 agp_flush_cache();
194
195 return gatt;
196}
197
198void
199agp_free_gatt(struct agp_gatt *gatt)
200{
201 contigfree(gatt->ag_virtual,
202 gatt->ag_entries * sizeof(u_int32_t), M_AGP);
203 free(gatt, M_AGP);
204}
205
206static int agp_max[][2] = {
207 {0, 0},
208 {32, 4},
209 {64, 28},
210 {128, 96},
211 {256, 204},
212 {512, 440},
213 {1024, 942},
214 {2048, 1920},
215 {4096, 3932}
216};
217#define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0]))
218
219int
220agp_generic_attach(device_t dev)
221{
222 struct agp_softc *sc = device_get_softc(dev);
223 int rid, memsize, i;
224
225 /*
226 * Find and map the aperture.
227 */
228 rid = AGP_APBASE;
229 sc->as_aperture = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
230 0, ~0, 1, RF_ACTIVE);
231 if (!sc->as_aperture)
232 return ENOMEM;
233
234 /*
235 * Work out an upper bound for agp memory allocation. This
236 * uses a heurisitc table from the Linux driver.
237 */
238 memsize = ptoa(Maxmem) >> 20;
239 for (i = 0; i < agp_max_size; i++) {
240 if (memsize <= agp_max[i][0])
241 break;
242 }
243 if (i == agp_max_size) i = agp_max_size - 1;
244 sc->as_maxmem = agp_max[i][1] << 20U;
245
246 /*
247 * The lock is used to prevent re-entry to
248 * agp_generic_bind_memory() since that function can sleep.
249 */
250 lockinit(&sc->as_lock, PZERO|PCATCH, "agplk", 0, 0);
251
252 /*
253 * Initialise stuff for the userland device.
254 */
255 agp_devclass = devclass_find("agp");
256 TAILQ_INIT(&sc->as_memory);
257 sc->as_nextid = 1;
258
259 sc->as_devnode = make_dev(&agp_cdevsw,
260 device_get_unit(dev),
261 UID_ROOT,
262 GID_WHEEL,
263 0600,
264 "agpgart");
265
266 return 0;
267}
268
269int
270agp_generic_detach(device_t dev)
271{
272 struct agp_softc *sc = device_get_softc(dev);
273 bus_release_resource(dev, SYS_RES_MEMORY, AGP_APBASE, sc->as_aperture);
dadab5e9 274 lockmgr(&sc->as_lock, LK_DRAIN, 0, curthread); /* XXX */
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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
dadab5e9 392 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curthread); /* XXX */
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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 if ((m->flags & PG_ZERO) == 0)
426 vm_page_zero_fill(m);
427 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m));
428 vm_page_wire(m);
429
430 /*
431 * Install entries in the GATT, making sure that if
432 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not
433 * aligned to PAGE_SIZE, we don't modify too many GATT
434 * entries.
435 */
436 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size;
437 j += AGP_PAGE_SIZE) {
438 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j;
439 AGP_DPF("binding offset %#x to pa %#x\n",
440 offset + i + j, pa);
441 error = AGP_BIND_PAGE(dev, offset + i + j, pa);
442 if (error) {
443 /*
444 * Bail out. Reverse all the mappings
445 * and unwire the pages.
446 */
447 vm_page_wakeup(m);
448 for (k = 0; k < i + j; k += AGP_PAGE_SIZE)
449 AGP_UNBIND_PAGE(dev, offset + k);
450 for (k = 0; k <= i; k += PAGE_SIZE) {
451 m = vm_page_lookup(mem->am_obj,
452 OFF_TO_IDX(k));
453 vm_page_unwire(m, 0);
454 }
dadab5e9 455 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */
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456 return error;
457 }
458 }
459 vm_page_wakeup(m);
460 }
461
462 /*
463 * Flush the cpu cache since we are providing a new mapping
464 * for these pages.
465 */
466 agp_flush_cache();
467
468 /*
469 * Make sure the chipset gets the new mappings.
470 */
471 AGP_FLUSH_TLB(dev);
472
473 mem->am_offset = offset;
474 mem->am_is_bound = 1;
475
dadab5e9 476 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */
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477
478 return 0;
479}
480
481int
482agp_generic_unbind_memory(device_t dev, struct agp_memory *mem)
483{
484 struct agp_softc *sc = device_get_softc(dev);
485 vm_page_t m;
486 int i;
487
dadab5e9 488 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curthread); /* XXX */
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489
490 if (!mem->am_is_bound) {
491 device_printf(dev, "memory is not bound\n");
492 return EINVAL;
493 }
494
495
496 /*
497 * Unbind the individual pages and flush the chipset's
498 * TLB. Unwire the pages so they can be swapped.
499 */
500 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
501 AGP_UNBIND_PAGE(dev, mem->am_offset + i);
502 for (i = 0; i < mem->am_size; i += PAGE_SIZE) {
503 m = vm_page_lookup(mem->am_obj, atop(i));
504 vm_page_unwire(m, 0);
505 }
506
507 agp_flush_cache();
508 AGP_FLUSH_TLB(dev);
509
510 mem->am_offset = 0;
511 mem->am_is_bound = 0;
512
dadab5e9 513 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */
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514
515 return 0;
516}
517
518/* Helper functions for implementing user/kernel api */
519
520static int
521agp_acquire_helper(device_t dev, enum agp_acquire_state state)
522{
523 struct agp_softc *sc = device_get_softc(dev);
524
525 if (sc->as_state != AGP_ACQUIRE_FREE)
526 return EBUSY;
527 sc->as_state = state;
528
529 return 0;
530}
531
532static int
533agp_release_helper(device_t dev, enum agp_acquire_state state)
534{
535 struct agp_softc *sc = device_get_softc(dev);
536
537 if (sc->as_state == AGP_ACQUIRE_FREE)
538 return 0;
539
540 if (sc->as_state != state)
541 return EBUSY;
542
543 sc->as_state = AGP_ACQUIRE_FREE;
544 return 0;
545}
546
547static struct agp_memory *
548agp_find_memory(device_t dev, int id)
549{
550 struct agp_softc *sc = device_get_softc(dev);
551 struct agp_memory *mem;
552
553 AGP_DPF("searching for memory block %d\n", id);
554 TAILQ_FOREACH(mem, &sc->as_memory, am_link) {
555 AGP_DPF("considering memory block %d\n", mem->am_id);
556 if (mem->am_id == id)
557 return mem;
558 }
559 return 0;
560}
561
562/* Implementation of the userland ioctl api */
563
564static int
565agp_info_user(device_t dev, agp_info *info)
566{
567 struct agp_softc *sc = device_get_softc(dev);
568
569 bzero(info, sizeof *info);
570 info->bridge_id = pci_get_devid(dev);
571 info->agp_mode =
572 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
573 info->aper_base = rman_get_start(sc->as_aperture);
574 info->aper_size = AGP_GET_APERTURE(dev) >> 20;
575 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT;
576 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT;
577
578 return 0;
579}
580
581static int
582agp_setup_user(device_t dev, agp_setup *setup)
583{
584 return AGP_ENABLE(dev, setup->agp_mode);
585}
586
587static int
588agp_allocate_user(device_t dev, agp_allocate *alloc)
589{
590 struct agp_memory *mem;
591
592 mem = AGP_ALLOC_MEMORY(dev,
593 alloc->type,
594 alloc->pg_count << AGP_PAGE_SHIFT);
595 if (mem) {
596 alloc->key = mem->am_id;
597 alloc->physical = mem->am_physical;
598 return 0;
599 } else {
600 return ENOMEM;
601 }
602}
603
604static int
605agp_deallocate_user(device_t dev, int id)
606{
607 struct agp_memory *mem = agp_find_memory(dev, id);;
608
609 if (mem) {
610 AGP_FREE_MEMORY(dev, mem);
611 return 0;
612 } else {
613 return ENOENT;
614 }
615}
616
617static int
618agp_bind_user(device_t dev, agp_bind *bind)
619{
620 struct agp_memory *mem = agp_find_memory(dev, bind->key);
621
622 if (!mem)
623 return ENOENT;
624
625 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT);
626}
627
628static int
629agp_unbind_user(device_t dev, agp_unbind *unbind)
630{
631 struct agp_memory *mem = agp_find_memory(dev, unbind->key);
632
633 if (!mem)
634 return ENOENT;
635
636 return AGP_UNBIND_MEMORY(dev, mem);
637}
638
639static int
41c20dac 640agp_open(dev_t kdev, int oflags, int devtype, struct thread *td)
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641{
642 device_t dev = KDEV2DEV(kdev);
643 struct agp_softc *sc = device_get_softc(dev);
644
645 if (!sc->as_isopen) {
646 sc->as_isopen = 1;
647 device_busy(dev);
648 }
649
650 return 0;
651}
652
653static int
41c20dac 654agp_close(dev_t kdev, int fflag, int devtype, struct thread *td)
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655{
656 device_t dev = KDEV2DEV(kdev);
657 struct agp_softc *sc = device_get_softc(dev);
658 struct agp_memory *mem;
659
660 /*
661 * Clear the GATT and force release on last close
662 */
663 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) {
664 if (mem->am_is_bound)
665 AGP_UNBIND_MEMORY(dev, mem);
666 AGP_FREE_MEMORY(dev, mem);
667 }
668 if (sc->as_state == AGP_ACQUIRE_USER)
669 agp_release_helper(dev, AGP_ACQUIRE_USER);
670 sc->as_isopen = 0;
671 device_unbusy(dev);
672
673 return 0;
674}
675
676static int
41c20dac 677agp_ioctl(dev_t kdev, u_long cmd, caddr_t data, int fflag, struct thread *td)
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678{
679 device_t dev = KDEV2DEV(kdev);
680
681 switch (cmd) {
682 case AGPIOC_INFO:
683 return agp_info_user(dev, (agp_info *) data);
684
685 case AGPIOC_ACQUIRE:
686 return agp_acquire_helper(dev, AGP_ACQUIRE_USER);
687
688 case AGPIOC_RELEASE:
689 return agp_release_helper(dev, AGP_ACQUIRE_USER);
690
691 case AGPIOC_SETUP:
692 return agp_setup_user(dev, (agp_setup *)data);
693
694 case AGPIOC_ALLOCATE:
695 return agp_allocate_user(dev, (agp_allocate *)data);
696
697 case AGPIOC_DEALLOCATE:
698 return agp_deallocate_user(dev, *(int *) data);
699
700 case AGPIOC_BIND:
701 return agp_bind_user(dev, (agp_bind *)data);
702
703 case AGPIOC_UNBIND:
704 return agp_unbind_user(dev, (agp_unbind *)data);
705
706 }
707
708 return EINVAL;
709}
710
711static int
712agp_mmap(dev_t kdev, vm_offset_t offset, int prot)
713{
714 device_t dev = KDEV2DEV(kdev);
715 struct agp_softc *sc = device_get_softc(dev);
716
717 if (offset > AGP_GET_APERTURE(dev))
718 return -1;
719 return atop(rman_get_start(sc->as_aperture) + offset);
720}
721
722/* Implementation of the kernel api */
723
724device_t
725agp_find_device()
726{
727 if (!agp_devclass)
728 return 0;
729 return devclass_get_device(agp_devclass, 0);
730}
731
732enum agp_acquire_state
733agp_state(device_t dev)
734{
735 struct agp_softc *sc = device_get_softc(dev);
736 return sc->as_state;
737}
738
739void
740agp_get_info(device_t dev, struct agp_info *info)
741{
742 struct agp_softc *sc = device_get_softc(dev);
743
744 info->ai_mode =
745 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4);
746 info->ai_aperture_base = rman_get_start(sc->as_aperture);
747 info->ai_aperture_size = (rman_get_end(sc->as_aperture)
748 - rman_get_start(sc->as_aperture)) + 1;
749 info->ai_aperture_va = (vm_offset_t) rman_get_virtual(sc->as_aperture);
750 info->ai_memory_allowed = sc->as_maxmem;
751 info->ai_memory_used = sc->as_allocated;
752}
753
754int
755agp_acquire(device_t dev)
756{
757 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL);
758}
759
760int
761agp_release(device_t dev)
762{
763 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL);
764}
765
766int
767agp_enable(device_t dev, u_int32_t mode)
768{
769 return AGP_ENABLE(dev, mode);
770}
771
772void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes)
773{
774 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes);
775}
776
777void agp_free_memory(device_t dev, void *handle)
778{
779 struct agp_memory *mem = (struct agp_memory *) handle;
780 AGP_FREE_MEMORY(dev, mem);
781}
782
783int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset)
784{
785 struct agp_memory *mem = (struct agp_memory *) handle;
786 return AGP_BIND_MEMORY(dev, mem, offset);
787}
788
789int agp_unbind_memory(device_t dev, void *handle)
790{
791 struct agp_memory *mem = (struct agp_memory *) handle;
792 return AGP_UNBIND_MEMORY(dev, mem);
793}
794
795void agp_memory_info(device_t dev, void *handle, struct
796 agp_memory_info *mi)
797{
798 struct agp_memory *mem = (struct agp_memory *) handle;
799
800 mi->ami_size = mem->am_size;
801 mi->ami_physical = mem->am_physical;
802 mi->ami_offset = mem->am_offset;
803 mi->ami_is_bound = mem->am_is_bound;
804}