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1 /*-
2  * Copyright (c) 2000 Doug Rabson
3  * Copyright (c) 2000 Ruslan Ermilov
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27
28 /*
29  * Fixes for 830/845G support: David Dawes <dawes@xfree86.org>
30  * 852GM/855GM/865G support added by David Dawes <dawes@xfree86.org>
31  */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #include "opt_bus.h"
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/malloc.h>
41 #include <sys/kernel.h>
42 #include <sys/bus.h>
43 #include <sys/lock.h>
44 #include <sys/lockmgr.h>
45 #include <sys/mutex.h>
46 #include <sys/proc.h>
47
48 #include <dev/pci/pcivar.h>
49 #include <dev/pci/pcireg.h>
50 #include <pci/agppriv.h>
51 #include <pci/agpreg.h>
52
53 #include <vm/vm.h>
54 #include <vm/vm_object.h>
55 #include <vm/vm_page.h>
56 #include <vm/vm_pageout.h>
57 #include <vm/pmap.h>
58
59 #include <machine/bus.h>
60 #include <machine/resource.h>
61 #include <sys/rman.h>
62
63 MALLOC_DECLARE(M_AGP);
64
65 #define READ1(off)      bus_space_read_1(sc->bst, sc->bsh, off)
66 #define READ4(off)      bus_space_read_4(sc->bst, sc->bsh, off)
67 #define WRITE4(off,v)   bus_space_write_4(sc->bst, sc->bsh, off, v)
68
69 #define CHIP_I810 0     /* i810/i815 */
70 #define CHIP_I830 1     /* 830M/845G */
71 #define CHIP_I855 2     /* 852GM/855GM/865G */
72
73 struct agp_i810_softc {
74         struct agp_softc agp;
75         u_int32_t initial_aperture;     /* aperture size at startup */
76         struct agp_gatt *gatt;
77         int chiptype;                   /* i810-like or i830 */
78         u_int32_t dcache_size;          /* i810 only */
79         u_int32_t stolen;               /* number of i830/845 gtt entries for stolen memory */
80         device_t bdev;                  /* bridge device */
81         struct resource *regs;          /* memory mapped GC registers */
82         bus_space_tag_t bst;            /* bus_space tag */
83         bus_space_handle_t bsh;         /* bus_space handle */
84 };
85
86 static const char*
87 agp_i810_match(device_t dev)
88 {
89         if (pci_get_class(dev) != PCIC_DISPLAY
90             || pci_get_subclass(dev) != PCIS_DISPLAY_VGA)
91                 return NULL;
92
93         switch (pci_get_devid(dev)) {
94         case 0x71218086:
95                 return ("Intel 82810 (i810 GMCH) SVGA controller");
96
97         case 0x71238086:
98                 return ("Intel 82810-DC100 (i810-DC100 GMCH) SVGA controller");
99
100         case 0x71258086:
101                 return ("Intel 82810E (i810E GMCH) SVGA controller");
102
103         case 0x11328086:
104                 return ("Intel 82815 (i815 GMCH) SVGA controller");
105
106         case 0x35778086:
107                 return ("Intel 82830M (830M GMCH) SVGA controller");
108
109         case 0x25628086:
110                 return ("Intel 82845G (845G GMCH) SVGA controller");
111
112         case 0x35828086:
113                 switch (pci_read_config(dev, AGP_I85X_CAPID, 1)) {
114                 case AGP_I855_GME:
115                         return ("Intel 82855GME (855GME GMCH) SVGA controller");
116
117                 case AGP_I855_GM:
118                         return ("Intel 82855GM (855GM GMCH) SVGA controller");
119
120                 case AGP_I852_GME:
121                         return ("Intel 82852GME (852GME GMCH) SVGA controller");
122
123                 case AGP_I852_GM:
124                         return ("Intel 82852GM (852GM GMCH) SVGA controller");
125
126                 default:
127                         return ("Intel 8285xM (85xGM GMCH) SVGA controller");
128                 }
129
130         case 0x25728086:
131                 return ("Intel 82865G (865G GMCH) SVGA controller");
132         };
133
134         return NULL;
135 }
136
137 /*
138  * Find bridge device.
139  */
140 static device_t
141 agp_i810_find_bridge(device_t dev)
142 {
143         device_t *children, child;
144         int nchildren, i;
145         u_int32_t devid;
146
147         /*
148          * Calculate bridge device's ID.
149          */
150         devid = pci_get_devid(dev);
151         switch (devid) {
152         case 0x71218086:
153         case 0x71238086:
154         case 0x71258086:
155                 devid -= 0x10000;
156                 break;
157
158         case 0x11328086:
159         case 0x35778086:
160         case 0x25628086:
161         case 0x35828086:
162         case 0x25728086:
163                 devid -= 0x20000;
164                 break;
165         };
166         if (device_get_children(device_get_parent(dev), &children, &nchildren))
167                 return 0;
168
169         for (i = 0; i < nchildren; i++) {
170                 child = children[i];
171
172                 if (pci_get_devid(child) == devid) {
173                         free(children, M_TEMP);
174                         return child;
175                 }
176         }
177         free(children, M_TEMP);
178         return 0;
179 }
180
181 static int
182 agp_i810_probe(device_t dev)
183 {
184         const char *desc;
185
186         desc = agp_i810_match(dev);
187         if (desc) {
188                 device_t bdev;
189                 u_int8_t smram;
190                 unsigned int gcc1;
191                 int devid = pci_get_devid(dev);
192
193                 bdev = agp_i810_find_bridge(dev);
194                 if (!bdev) {
195                         if (bootverbose)
196                                 printf("I810: can't find bridge device\n");
197                         return ENXIO;
198                 }
199
200                 /*
201                  * checking whether internal graphics device has been activated.
202                  */
203                 switch (devid) {
204                         /* i810 */
205                 case 0x71218086:
206                 case 0x71238086:
207                 case 0x71258086:
208                 case 0x11328086:
209                         smram = pci_read_config(bdev, AGP_I810_SMRAM, 1);
210                         if ((smram & AGP_I810_SMRAM_GMS)
211                             == AGP_I810_SMRAM_GMS_DISABLED) {
212                                 if (bootverbose)
213                                         printf("I810: disabled, not probing\n");
214                                 return ENXIO;
215                         }
216                         break;
217
218                         /* i830 */
219                 case 0x35778086:
220                 case 0x35828086:
221                 case 0x25628086:
222                 case 0x25728086:
223                         gcc1 = pci_read_config(bdev, AGP_I830_GCC1, 1);
224                         if ((gcc1 & AGP_I830_GCC1_DEV2) == AGP_I830_GCC1_DEV2_DISABLED) {
225                                 if (bootverbose)
226                                         printf("I830: disabled, not probing\n");
227                                 return ENXIO;
228                         }
229                         break;
230
231                 default:
232                         return ENXIO;
233                 }
234
235                 device_verbose(dev);
236                 device_set_desc(dev, desc);
237                 return 0;
238         }
239
240         return ENXIO;
241 }
242
243 static int
244 agp_i810_attach(device_t dev)
245 {
246         struct agp_i810_softc *sc = device_get_softc(dev);
247         struct agp_gatt *gatt;
248         int error, rid;
249
250         sc->bdev = agp_i810_find_bridge(dev);
251         if (!sc->bdev)
252                 return ENOENT;
253
254         error = agp_generic_attach(dev);
255         if (error)
256                 return error;
257
258         switch (pci_get_devid(dev)) {
259         case 0x71218086:
260         case 0x71238086:
261         case 0x71258086:
262         case 0x11328086:
263                 sc->chiptype = CHIP_I810;
264                 break;
265         case 0x35778086:
266         case 0x25628086:
267                 sc->chiptype = CHIP_I830;
268                 break;
269         case 0x35828086:
270         case 0x25728086:
271                 sc->chiptype = CHIP_I855;
272                 break;
273         };
274
275         /* Same for i810 and i830 */
276         rid = AGP_I810_MMADR;
277         sc->regs = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
278                                       0, ~0, 1, RF_ACTIVE);
279         if (!sc->regs) {
280                 agp_generic_detach(dev);
281                 return ENOMEM;
282         }
283         sc->bst = rman_get_bustag(sc->regs);
284         sc->bsh = rman_get_bushandle(sc->regs);
285
286         sc->initial_aperture = AGP_GET_APERTURE(dev);
287
288         gatt = malloc( sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
289         if (!gatt) {
290                 agp_generic_detach(dev);
291                 return ENOMEM;
292         }
293         sc->gatt = gatt;
294
295         gatt->ag_entries = AGP_GET_APERTURE(dev) >> AGP_PAGE_SHIFT;
296
297         if ( sc->chiptype == CHIP_I810 ) {
298                 /* Some i810s have on-chip memory called dcache */
299                 if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED)
300                         sc->dcache_size = 4 * 1024 * 1024;
301                 else
302                         sc->dcache_size = 0;
303
304                 /* According to the specs the gatt on the i810 must be 64k */
305                 gatt->ag_virtual = contigmalloc( 64 * 1024, M_AGP, 0, 
306                                         0, ~0, PAGE_SIZE, 0);
307                 if (!gatt->ag_virtual) {
308                         if (bootverbose)
309                                 device_printf(dev, "contiguous allocation failed\n");
310                         free(gatt, M_AGP);
311                         agp_generic_detach(dev);
312                         return ENOMEM;
313                 }
314                 bzero(gatt->ag_virtual, gatt->ag_entries * sizeof(u_int32_t));
315         
316                 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
317                 agp_flush_cache();
318                 /* Install the GATT. */
319                 WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1);
320         } else if ( sc->chiptype == CHIP_I830 ) {
321                 /* The i830 automatically initializes the 128k gatt on boot. */
322                 unsigned int gcc1, pgtblctl;
323                 
324                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 1);
325                 switch (gcc1 & AGP_I830_GCC1_GMS) {
326                         case AGP_I830_GCC1_GMS_STOLEN_512:
327                                 sc->stolen = (512 - 132) * 1024 / 4096;
328                                 break;
329                         case AGP_I830_GCC1_GMS_STOLEN_1024: 
330                                 sc->stolen = (1024 - 132) * 1024 / 4096;
331                                 break;
332                         case AGP_I830_GCC1_GMS_STOLEN_8192: 
333                                 sc->stolen = (8192 - 132) * 1024 / 4096;
334                                 break;
335                         default:
336                                 sc->stolen = 0;
337                                 device_printf(dev, "unknown memory configuration, disabling\n");
338                                 agp_generic_detach(dev);
339                                 return EINVAL;
340                 }
341                 if (sc->stolen > 0)
342                         device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
343                 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
344
345                 /* GATT address is already in there, make sure it's enabled */
346                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
347                 pgtblctl |= 1;
348                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
349
350                 gatt->ag_physical = pgtblctl & ~1;
351         } else {        /* CHIP_I855 */
352                 /* The i855 automatically initializes the 128k gatt on boot. */
353                 unsigned int gcc1, pgtblctl;
354                 
355                 gcc1 = pci_read_config(sc->bdev, AGP_I855_GCC1, 1);
356                 switch (gcc1 & AGP_I855_GCC1_GMS) {
357                         case AGP_I855_GCC1_GMS_STOLEN_1M:
358                                 sc->stolen = (1024 - 132) * 1024 / 4096;
359                                 break;
360                         case AGP_I855_GCC1_GMS_STOLEN_4M: 
361                                 sc->stolen = (4096 - 132) * 1024 / 4096;
362                                 break;
363                         case AGP_I855_GCC1_GMS_STOLEN_8M: 
364                                 sc->stolen = (8192 - 132) * 1024 / 4096;
365                                 break;
366                         case AGP_I855_GCC1_GMS_STOLEN_16M: 
367                                 sc->stolen = (16384 - 132) * 1024 / 4096;
368                                 break;
369                         case AGP_I855_GCC1_GMS_STOLEN_32M: 
370                                 sc->stolen = (32768 - 132) * 1024 / 4096;
371                                 break;
372                         default:
373                                 sc->stolen = 0;
374                                 device_printf(dev, "unknown memory configuration, disabling\n");
375                                 agp_generic_detach(dev);
376                                 return EINVAL;
377                 }
378                 if (sc->stolen > 0)
379                         device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
380                 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
381
382                 /* GATT address is already in there, make sure it's enabled */
383                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
384                 pgtblctl |= 1;
385                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
386
387                 gatt->ag_physical = pgtblctl & ~1;
388         }
389
390         /* Add a device for the drm to attach to */
391         if (!device_add_child( dev, "drmsub", -1 ))
392                 printf("out of memory...\n");
393
394         return bus_generic_attach(dev);
395 }
396
397 static int
398 agp_i810_detach(device_t dev)
399 {
400         struct agp_i810_softc *sc = device_get_softc(dev);
401         int error;
402         device_t child;
403
404         error = agp_generic_detach(dev);
405         if (error)
406                 return error;
407
408         /* Clear the GATT base. */
409         if ( sc->chiptype == CHIP_I810 ) {
410                 WRITE4(AGP_I810_PGTBL_CTL, 0);
411         } else {
412                 unsigned int pgtblctl;
413                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
414                 pgtblctl &= ~1;
415                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
416         }
417
418         /* Put the aperture back the way it started. */
419         AGP_SET_APERTURE(dev, sc->initial_aperture);
420
421         if ( sc->chiptype == CHIP_I810 ) {
422                 contigfree(sc->gatt->ag_virtual, 64 * 1024, M_AGP);
423         }
424         free(sc->gatt, M_AGP);
425
426         bus_release_resource(dev, SYS_RES_MEMORY,
427                              AGP_I810_MMADR, sc->regs);
428
429         child = device_find_child( dev, "drmsub", 0 );
430         if (child)
431            device_delete_child( dev, child );
432
433         return 0;
434 }
435
436 static u_int32_t
437 agp_i810_get_aperture(device_t dev)
438 {
439         struct agp_i810_softc *sc = device_get_softc(dev);
440
441         if ( sc->chiptype == CHIP_I810 ) {
442                 u_int16_t miscc;
443                 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
444                 if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32)
445                         return 32 * 1024 * 1024;
446                 else
447                         return 64 * 1024 * 1024;
448         } else if ( sc->chiptype == CHIP_I830 ) {
449                 unsigned int gcc1;
450
451                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
452                 if ((gcc1 & AGP_I830_GCC1_GMASIZE) == AGP_I830_GCC1_GMASIZE_64)
453                         return 64 * 1024 * 1024;
454                 else
455                         return 128 * 1024 * 1024;
456         } else { /* CHIP_I855 */
457                 return 128 * 1024 * 1024;
458         }
459 }
460
461 static int
462 agp_i810_set_aperture(device_t dev, u_int32_t aperture)
463 {
464         struct agp_i810_softc *sc = device_get_softc(dev);
465         u_int16_t miscc;
466
467         if ( sc->chiptype == CHIP_I810 ) {
468                 /*
469                  * Double check for sanity.
470                  */
471                 if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
472                         device_printf(dev, "bad aperture size %d\n", aperture);
473                         return EINVAL;
474                 }
475         
476                 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
477                 miscc &= ~AGP_I810_MISCC_WINSIZE;
478                 if (aperture == 32 * 1024 * 1024)
479                         miscc |= AGP_I810_MISCC_WINSIZE_32;
480                 else
481                         miscc |= AGP_I810_MISCC_WINSIZE_64;
482         
483                 pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);
484         } else if ( sc->chiptype == CHIP_I830 ) {
485                 unsigned int gcc1;
486
487                 if (aperture != 64 * 1024 * 1024 && aperture != 128 * 1024 * 1024) {
488                         device_printf(dev, "bad aperture size %d\n", aperture);
489                         return EINVAL;
490                 }
491                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
492                 gcc1 &= ~AGP_I830_GCC1_GMASIZE;
493                 if (aperture == 64 * 1024 * 1024)
494                         gcc1 |= AGP_I830_GCC1_GMASIZE_64;
495                 else
496                         gcc1 |= AGP_I830_GCC1_GMASIZE_128;
497
498                 pci_write_config(sc->bdev, AGP_I830_GCC1, gcc1, 2);
499         } else {        /* CHIP_I855 */
500                 if (aperture != 128 * 1024 * 1024) {
501                         device_printf(dev, "bad aperture size %d\n", aperture);
502                         return EINVAL;
503                 }
504         }
505
506         return 0;
507 }
508
509 static int
510 agp_i810_bind_page(device_t dev, int offset, vm_offset_t physical)
511 {
512         struct agp_i810_softc *sc = device_get_softc(dev);
513
514         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) {
515                 device_printf(dev, "failed: offset is 0x%08x, shift is %d, entries is %d\n", offset, AGP_PAGE_SHIFT, sc->gatt->ag_entries);
516                 return EINVAL;
517         }
518
519         if ( sc->chiptype != CHIP_I810 ) {
520                 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
521                         device_printf(dev, "trying to bind into stolen memory");
522                         return EINVAL;
523                 }
524         }
525
526         WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
527         return 0;
528 }
529
530 static int
531 agp_i810_unbind_page(device_t dev, int offset)
532 {
533         struct agp_i810_softc *sc = device_get_softc(dev);
534
535         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
536                 return EINVAL;
537
538         if ( sc->chiptype != CHIP_I810 ) {
539                 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
540                         device_printf(dev, "trying to unbind from stolen memory");
541                         return EINVAL;
542                 }
543         }
544
545         WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, 0);
546         return 0;
547 }
548
549 /*
550  * Writing via memory mapped registers already flushes all TLBs.
551  */
552 static void
553 agp_i810_flush_tlb(device_t dev)
554 {
555 }
556
557 static int
558 agp_i810_enable(device_t dev, u_int32_t mode)
559 {
560
561         return 0;
562 }
563
564 static struct agp_memory *
565 agp_i810_alloc_memory(device_t dev, int type, vm_size_t size)
566 {
567         struct agp_i810_softc *sc = device_get_softc(dev);
568         struct agp_memory *mem;
569
570         if ((size & (AGP_PAGE_SIZE - 1)) != 0)
571                 return 0;
572
573         if (sc->agp.as_allocated + size > sc->agp.as_maxmem)
574                 return 0;
575
576         if (type == 1) {
577                 /*
578                  * Mapping local DRAM into GATT.
579                  */
580                 if ( sc->chiptype != CHIP_I810 )
581                         return 0;
582                 if (size != sc->dcache_size)
583                         return 0;
584         } else if (type == 2) {
585                 /*
586                  * Bogus mapping of a single page for the hardware cursor.
587                  */
588                 if (size != AGP_PAGE_SIZE)
589                         return 0;
590         }
591
592         mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
593         mem->am_id = sc->agp.as_nextid++;
594         mem->am_size = size;
595         mem->am_type = type;
596         if (type != 1)
597                 mem->am_obj = vm_object_allocate(OBJT_DEFAULT,
598                                                  atop(round_page(size)));
599         else
600                 mem->am_obj = 0;
601
602         if (type == 2) {
603                 /*
604                  * Allocate and wire down the page now so that we can
605                  * get its physical address.
606                  */
607                 vm_page_t m;
608
609                 VM_OBJECT_LOCK(mem->am_obj);
610                 m = vm_page_grab(mem->am_obj, 0,
611                     VM_ALLOC_WIRED | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
612                 VM_OBJECT_UNLOCK(mem->am_obj);
613                 if ((m->flags & PG_ZERO) == 0)
614                         pmap_zero_page(m);
615                 vm_page_lock_queues();
616                 mem->am_physical = VM_PAGE_TO_PHYS(m);
617                 vm_page_wakeup(m);
618                 vm_page_unlock_queues();
619         } else {
620                 mem->am_physical = 0;
621         }
622
623         mem->am_offset = 0;
624         mem->am_is_bound = 0;
625         TAILQ_INSERT_TAIL(&sc->agp.as_memory, mem, am_link);
626         sc->agp.as_allocated += size;
627
628         return mem;
629 }
630
631 static int
632 agp_i810_free_memory(device_t dev, struct agp_memory *mem)
633 {
634         struct agp_i810_softc *sc = device_get_softc(dev);
635
636         if (mem->am_is_bound)
637                 return EBUSY;
638
639         if (mem->am_type == 2) {
640                 /*
641                  * Unwire the page which we wired in alloc_memory.
642                  */
643                 vm_page_t m;
644
645                 VM_OBJECT_LOCK(mem->am_obj);
646                 m = vm_page_lookup(mem->am_obj, 0);
647                 VM_OBJECT_UNLOCK(mem->am_obj);
648                 vm_page_lock_queues();
649                 vm_page_unwire(m, 0);
650                 vm_page_unlock_queues();
651         }
652
653         sc->agp.as_allocated -= mem->am_size;
654         TAILQ_REMOVE(&sc->agp.as_memory, mem, am_link);
655         if (mem->am_obj)
656                 vm_object_deallocate(mem->am_obj);
657         free(mem, M_AGP);
658         return 0;
659 }
660
661 static int
662 agp_i810_bind_memory(device_t dev, struct agp_memory *mem,
663                      vm_offset_t offset)
664 {
665         struct agp_i810_softc *sc = device_get_softc(dev);
666         vm_offset_t i;
667
668         if (mem->am_type != 1)
669                 return agp_generic_bind_memory(dev, mem, offset);
670
671         if ( sc->chiptype != CHIP_I810 )
672                 return EINVAL;
673
674         for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
675                 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4,
676                        i | 3);
677         }
678
679         return 0;
680 }
681
682 static int
683 agp_i810_unbind_memory(device_t dev, struct agp_memory *mem)
684 {
685         struct agp_i810_softc *sc = device_get_softc(dev);
686         vm_offset_t i;
687
688         if (mem->am_type != 1)
689                 return agp_generic_unbind_memory(dev, mem);
690
691         if ( sc->chiptype != CHIP_I810 )
692                 return EINVAL;
693
694         for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
695                 WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
696
697         return 0;
698 }
699
700 static int
701 agp_i810_print_child(device_t dev, device_t child)
702 {
703         int retval = 0;
704
705         retval += bus_print_child_header(dev, child);
706         retval += printf(": (child of agp_i810.c)");
707         retval += bus_print_child_footer(dev, child);
708
709         return retval;
710 }
711
712 static device_method_t agp_i810_methods[] = {
713         /* Device interface */
714         DEVMETHOD(device_probe,         agp_i810_probe),
715         DEVMETHOD(device_attach,        agp_i810_attach),
716         DEVMETHOD(device_detach,        agp_i810_detach),
717         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
718         DEVMETHOD(device_suspend,       bus_generic_suspend),
719         DEVMETHOD(device_resume,        bus_generic_resume),
720
721         /* AGP interface */
722         DEVMETHOD(agp_get_aperture,     agp_i810_get_aperture),
723         DEVMETHOD(agp_set_aperture,     agp_i810_set_aperture),
724         DEVMETHOD(agp_bind_page,        agp_i810_bind_page),
725         DEVMETHOD(agp_unbind_page,      agp_i810_unbind_page),
726         DEVMETHOD(agp_flush_tlb,        agp_i810_flush_tlb),
727         DEVMETHOD(agp_enable,           agp_i810_enable),
728         DEVMETHOD(agp_alloc_memory,     agp_i810_alloc_memory),
729         DEVMETHOD(agp_free_memory,      agp_i810_free_memory),
730         DEVMETHOD(agp_bind_memory,      agp_i810_bind_memory),
731         DEVMETHOD(agp_unbind_memory,    agp_i810_unbind_memory),
732
733         /* bus methods */
734         DEVMETHOD(bus_print_child,      agp_i810_print_child),
735         DEVMETHOD(bus_alloc_resource,   bus_generic_alloc_resource),
736         DEVMETHOD(bus_release_resource, bus_generic_release_resource),
737         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
738         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
739         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
740         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
741         { 0, 0 }
742 };
743
744 static driver_t agp_i810_driver = {
745         "agp",
746         agp_i810_methods,
747         sizeof(struct agp_i810_softc),
748 };
749
750 static devclass_t agp_devclass;
751
752 DRIVER_MODULE(agp_i810, pci, agp_i810_driver, agp_devclass, 0, 0);
753 MODULE_DEPEND(agp_i810, agp, 1, 1, 1);
754 MODULE_DEPEND(agp_i810, pci, 1, 1, 1);