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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/module.h>
43 #include <sys/bus.h>
44 #include <sys/lock.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 #define WRITEGTT(off,v) bus_space_write_4(sc->gtt_bst, sc->gtt_bsh, off, v)
69
70 #define CHIP_I810 0     /* i810/i815 */
71 #define CHIP_I830 1     /* 830M/845G */
72 #define CHIP_I855 2     /* 852GM/855GM/865G */
73 #define CHIP_I915 3     /* 915G/915GM */
74
75 struct agp_i810_softc {
76         struct agp_softc agp;
77         u_int32_t initial_aperture;     /* aperture size at startup */
78         struct agp_gatt *gatt;
79         int chiptype;                   /* i810-like or i830 */
80         u_int32_t dcache_size;          /* i810 only */
81         u_int32_t stolen;               /* number of i830/845 gtt entries for stolen memory */
82         device_t bdev;                  /* bridge device */
83
84         struct resource *regs;          /* memory mapped GC registers */
85         bus_space_tag_t bst;            /* bus_space tag */
86         bus_space_handle_t bsh;         /* bus_space handle */
87
88         struct resource *gtt;           /* memory mapped GATT entries */
89         bus_space_tag_t gtt_bst;        /* bus_space tag */
90         bus_space_handle_t gtt_bsh;     /* bus_space handle */
91
92         struct resource *gm;            /* unmapped (but allocated) aperture */
93
94         void *argb_cursor;              /* contigmalloc area for ARGB cursor */
95 };
96
97 /* For adding new devices, devid is the id of the graphics controller
98  * (pci:0:2:0, for example).  The placeholder (usually at pci:0:2:1) for the
99  * second head should never be added.  The bridge_offset is the offset to
100  * subtract from devid to get the id of the hostb that the device is on.
101  */
102 static const struct agp_i810_match {
103         int devid;
104         int chiptype;
105         int bridge_offset;
106         char *name;
107 } agp_i810_matches[] = {
108         {0x71218086, CHIP_I810, 0x00010000,
109             "Intel 82810 (i810 GMCH) SVGA controller"},
110         {0x71238086, CHIP_I810, 0x00010000,
111             "Intel 82810-DC100 (i810-DC100 GMCH) SVGA controller"},
112         {0x71258086, CHIP_I810, 0x00010000,
113             "Intel 82810E (i810E GMCH) SVGA controller"},
114         {0x11328086, CHIP_I810, 0x00020000,
115             "Intel 82815 (i815 GMCH) SVGA controller"},
116         {0x35778086, CHIP_I830, 0x00020000,
117             "Intel 82830M (830M GMCH) SVGA controller"},
118         {0x35828086, CHIP_I855, 0x00020000,
119             "Intel 82852/5"},
120         {0x25728086, CHIP_I855, 0x00020000,
121             "Intel 82865G (865G GMCH) SVGA controller"},
122         {0x25828086, CHIP_I915, 0x00020000,
123             "Intel 82915G (915G GMCH) SVGA controller"},
124         {0x25928086, CHIP_I915, 0x00020000,
125             "Intel 82915GM (915GM GMCH) SVGA controller"},
126         {0x27728086, CHIP_I915, 0x00020000,
127             "Intel 82945G (945G GMCH) SVGA controller"},
128         {0x27A28086, CHIP_I915, 0x00020000,
129             "Intel 82945GM (945GM GMCH) SVGA controller"},
130         {0, 0, 0, NULL}
131 };
132
133 static const struct agp_i810_match*
134 agp_i810_match(device_t dev)
135 {
136         int i, devid;
137
138         if (pci_get_class(dev) != PCIC_DISPLAY
139             || pci_get_subclass(dev) != PCIS_DISPLAY_VGA)
140                 return NULL;
141
142         devid = pci_get_devid(dev);
143         for (i = 0; agp_i810_matches[i].devid != 0; i++) {
144                 if (agp_i810_matches[i].devid == devid)
145                     break;
146         }
147         if (agp_i810_matches[i].devid == 0)
148                 return NULL;
149         else
150                 return &agp_i810_matches[i];
151 }
152
153 /*
154  * Find bridge device.
155  */
156 static device_t
157 agp_i810_find_bridge(device_t dev)
158 {
159         device_t *children, child;
160         int nchildren, i;
161         u_int32_t devid;
162         const struct agp_i810_match *match;
163   
164         match = agp_i810_match(dev);
165         devid = match->devid - match->bridge_offset;
166
167         if (device_get_children(device_get_parent(device_get_parent(dev)),
168             &children, &nchildren))
169                 return 0;
170
171         for (i = 0; i < nchildren; i++) {
172                 child = children[i];
173
174                 if (pci_get_devid(child) == devid) {
175                         free(children, M_TEMP);
176                         return child;
177                 }
178         }
179         free(children, M_TEMP);
180         return 0;
181 }
182
183 static void
184 agp_i810_identify(driver_t *driver, device_t parent)
185 {
186
187         if (device_find_child(parent, "agp", -1) == NULL &&
188             agp_i810_match(parent))
189                 device_add_child(parent, "agp", -1);
190 }
191
192 static int
193 agp_i810_probe(device_t dev)
194 {
195         device_t bdev;
196         const struct agp_i810_match *match;
197
198         if (resource_disabled("agp", device_get_unit(dev)))
199                 return (ENXIO);
200         match = agp_i810_match(dev);
201         if (match == NULL)
202                 return ENXIO;
203
204         bdev = agp_i810_find_bridge(dev);
205         if (!bdev) {
206                 if (bootverbose)
207                         printf("I810: can't find bridge device\n");
208                 return ENXIO;
209         }
210
211         /*
212          * checking whether internal graphics device has been activated.
213          */
214         if (match->chiptype == CHIP_I810) {
215                 u_int8_t smram;
216
217                 smram = pci_read_config(bdev, AGP_I810_SMRAM, 1);
218                 if ((smram & AGP_I810_SMRAM_GMS)
219                     == AGP_I810_SMRAM_GMS_DISABLED) {
220                         if (bootverbose)
221                                 printf("I810: disabled, not probing\n");
222                         return ENXIO;
223                 }
224         } else if (match->chiptype == CHIP_I830 ||
225             match->chiptype == CHIP_I855) {
226                 unsigned int gcc1;
227
228                 gcc1 = pci_read_config(bdev, AGP_I830_GCC1, 1);
229                 if ((gcc1 & AGP_I830_GCC1_DEV2) ==
230                     AGP_I830_GCC1_DEV2_DISABLED) {
231                         if (bootverbose)
232                                 printf("I830: disabled, not probing\n");
233                         return ENXIO;
234                 }
235         } else if (match->chiptype == CHIP_I915) {
236                 unsigned int gcc1;
237
238                 gcc1 = pci_read_config(bdev, AGP_I915_DEVEN, 4);
239                 if ((gcc1 & AGP_I915_DEVEN_D2F0) ==
240                     AGP_I915_DEVEN_D2F0_DISABLED) {
241                         if (bootverbose)
242                                 printf("I915: disabled, not probing\n");
243                         return ENXIO;
244                 }
245         }
246
247         if (match->devid == 0x35828086) {
248                 switch (pci_read_config(dev, AGP_I85X_CAPID, 1)) {
249                 case AGP_I855_GME:
250                         device_set_desc(dev,
251                             "Intel 82855GME (855GME GMCH) SVGA controller");
252                         break;
253                 case AGP_I855_GM:
254                         device_set_desc(dev,
255                             "Intel 82855GM (855GM GMCH) SVGA controller");
256                         break;
257                 case AGP_I852_GME:
258                         device_set_desc(dev,
259                             "Intel 82852GME (852GME GMCH) SVGA controller");
260                         break;
261                 case AGP_I852_GM:
262                         device_set_desc(dev,
263                             "Intel 82852GM (852GM GMCH) SVGA controller");
264                         break;
265                 default:
266                         device_set_desc(dev,
267                             "Intel 8285xM (85xGM GMCH) SVGA controller");
268                         break;
269                 }
270         } else {
271                 device_set_desc(dev, match->name);
272         }
273
274         return BUS_PROBE_DEFAULT;
275 }
276
277 static int
278 agp_i810_attach(device_t dev)
279 {
280         struct agp_i810_softc *sc = device_get_softc(dev);
281         struct agp_gatt *gatt;
282         const struct agp_i810_match *match;
283         int error, rid;
284
285         sc->bdev = agp_i810_find_bridge(dev);
286         if (!sc->bdev)
287                 return ENOENT;
288
289         error = agp_generic_attach(dev);
290         if (error)
291                 return error;
292
293         match = agp_i810_match(dev);
294         sc->chiptype = match->chiptype;
295
296         /* Same for i810 and i830 */
297         if (sc->chiptype == CHIP_I915)
298                 rid = AGP_I915_MMADR;
299         else
300                 rid = AGP_I810_MMADR;
301
302         sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
303                                           RF_ACTIVE);
304         if (!sc->regs) {
305                 agp_generic_detach(dev);
306                 return ENODEV;
307         }
308         sc->bst = rman_get_bustag(sc->regs);
309         sc->bsh = rman_get_bushandle(sc->regs);
310
311         if (sc->chiptype == CHIP_I915) {
312                 rid = AGP_I915_GTTADR;
313                 sc->gtt = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
314                                                  RF_ACTIVE);
315                 if (!sc->gtt) {
316                         bus_release_resource(dev, SYS_RES_MEMORY,
317                                              AGP_I915_MMADR, sc->regs);
318                         agp_generic_detach(dev);
319                         return ENODEV;
320                 }
321                 sc->gtt_bst = rman_get_bustag(sc->gtt);
322                 sc->gtt_bsh = rman_get_bushandle(sc->gtt);
323
324                 /* While agp_generic_attach allocates the AGP_APBASE resource
325                  * to try to reserve the aperture, on the 915 the aperture
326                  * isn't in PCIR_BAR(0), it's in PCIR_BAR(2), so it allocated
327                  * the registers that we just mapped anyway.  So, allocate the
328                  * aperture here, which also gives us easy access to it for the
329                  * agp_i810_get_aperture().
330                  */
331                 rid = AGP_I915_GMADR;
332                 sc->gm = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0);
333                 if (sc->gm == NULL) {
334                         bus_release_resource(dev, SYS_RES_MEMORY,
335                                              AGP_I915_MMADR, sc->regs);
336                         bus_release_resource(dev, SYS_RES_MEMORY,
337                                              AGP_I915_GTTADR, sc->regs);
338                         agp_generic_detach(dev);
339                         return ENODEV;
340                 }
341         }
342
343         sc->initial_aperture = AGP_GET_APERTURE(dev);
344
345         gatt = malloc( sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
346         if (!gatt) {
347                 agp_generic_detach(dev);
348                 return ENOMEM;
349         }
350         sc->gatt = gatt;
351
352         gatt->ag_entries = AGP_GET_APERTURE(dev) >> AGP_PAGE_SHIFT;
353
354         if ( sc->chiptype == CHIP_I810 ) {
355                 /* Some i810s have on-chip memory called dcache */
356                 if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED)
357                         sc->dcache_size = 4 * 1024 * 1024;
358                 else
359                         sc->dcache_size = 0;
360
361                 /* According to the specs the gatt on the i810 must be 64k */
362                 gatt->ag_virtual = contigmalloc( 64 * 1024, M_AGP, 0, 
363                                         0, ~0, PAGE_SIZE, 0);
364                 if (!gatt->ag_virtual) {
365                         if (bootverbose)
366                                 device_printf(dev, "contiguous allocation failed\n");
367                         free(gatt, M_AGP);
368                         agp_generic_detach(dev);
369                         return ENOMEM;
370                 }
371                 bzero(gatt->ag_virtual, gatt->ag_entries * sizeof(u_int32_t));
372         
373                 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
374                 agp_flush_cache();
375                 /* Install the GATT. */
376                 WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1);
377         } else if ( sc->chiptype == CHIP_I830 ) {
378                 /* The i830 automatically initializes the 128k gatt on boot. */
379                 unsigned int gcc1, pgtblctl;
380                 
381                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 1);
382                 switch (gcc1 & AGP_I830_GCC1_GMS) {
383                         case AGP_I830_GCC1_GMS_STOLEN_512:
384                                 sc->stolen = (512 - 132) * 1024 / 4096;
385                                 break;
386                         case AGP_I830_GCC1_GMS_STOLEN_1024: 
387                                 sc->stolen = (1024 - 132) * 1024 / 4096;
388                                 break;
389                         case AGP_I830_GCC1_GMS_STOLEN_8192: 
390                                 sc->stolen = (8192 - 132) * 1024 / 4096;
391                                 break;
392                         default:
393                                 sc->stolen = 0;
394                                 device_printf(dev, "unknown memory configuration, disabling\n");
395                                 agp_generic_detach(dev);
396                                 return EINVAL;
397                 }
398                 if (sc->stolen > 0)
399                         device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
400                 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
401
402                 /* GATT address is already in there, make sure it's enabled */
403                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
404                 pgtblctl |= 1;
405                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
406
407                 gatt->ag_physical = pgtblctl & ~1;
408         } else if (sc->chiptype == CHIP_I855 || sc->chiptype == CHIP_I915) {    /* CHIP_I855 */
409                 unsigned int gcc1, pgtblctl, stolen;
410
411                 /* Stolen memory is set up at the beginning of the aperture by
412                  * the BIOS, consisting of the GATT followed by 4kb for the BIOS
413                  * display.
414                  */
415                 if (sc->chiptype == CHIP_I855)
416                         stolen = 132;
417                 else
418                         stolen = 260;
419
420                 gcc1 = pci_read_config(sc->bdev, AGP_I855_GCC1, 1);
421                 switch (gcc1 & AGP_I855_GCC1_GMS) {
422                         case AGP_I855_GCC1_GMS_STOLEN_1M:
423                                 sc->stolen = (1024 - stolen) * 1024 / 4096;
424                                 break;
425                         case AGP_I855_GCC1_GMS_STOLEN_4M: 
426                                 sc->stolen = (4096 - stolen) * 1024 / 4096;
427                                 break;
428                         case AGP_I855_GCC1_GMS_STOLEN_8M: 
429                                 sc->stolen = (8192 - stolen) * 1024 / 4096;
430                                 break;
431                         case AGP_I855_GCC1_GMS_STOLEN_16M: 
432                                 sc->stolen = (16384 - stolen) * 1024 / 4096;
433                                 break;
434                         case AGP_I855_GCC1_GMS_STOLEN_32M: 
435                                 sc->stolen = (32768 - stolen) * 1024 / 4096;
436                                 break;
437                         case AGP_I915_GCC1_GMS_STOLEN_48M: 
438                                 sc->stolen = (49152 - stolen) * 1024 / 4096;
439                                 break;
440                         case AGP_I915_GCC1_GMS_STOLEN_64M: 
441                                 sc->stolen = (65536 - stolen) * 1024 / 4096;
442                                 break;
443                         default:
444                                 sc->stolen = 0;
445                                 device_printf(dev, "unknown memory configuration, disabling\n");
446                                 agp_generic_detach(dev);
447                                 return EINVAL;
448                 }
449                 if (sc->stolen > 0)
450                         device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
451                 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
452
453                 /* GATT address is already in there, make sure it's enabled */
454                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
455                 pgtblctl |= 1;
456                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
457
458                 gatt->ag_physical = pgtblctl & ~1;
459         }
460
461         return 0;
462 }
463
464 static int
465 agp_i810_detach(device_t dev)
466 {
467         struct agp_i810_softc *sc = device_get_softc(dev);
468         int error;
469
470         error = agp_generic_detach(dev);
471         if (error)
472                 return error;
473
474         /* Clear the GATT base. */
475         if ( sc->chiptype == CHIP_I810 ) {
476                 WRITE4(AGP_I810_PGTBL_CTL, 0);
477         } else {
478                 unsigned int pgtblctl;
479                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
480                 pgtblctl &= ~1;
481                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
482         }
483
484         /* Put the aperture back the way it started. */
485         AGP_SET_APERTURE(dev, sc->initial_aperture);
486
487         if ( sc->chiptype == CHIP_I810 ) {
488                 contigfree(sc->gatt->ag_virtual, 64 * 1024, M_AGP);
489         }
490         free(sc->gatt, M_AGP);
491
492         if (sc->chiptype == CHIP_I915) {
493                 bus_release_resource(dev, SYS_RES_MEMORY, AGP_I915_GMADR,
494                                      sc->gm);
495                 bus_release_resource(dev, SYS_RES_MEMORY, AGP_I915_GTTADR,
496                                      sc->gtt);
497                 bus_release_resource(dev, SYS_RES_MEMORY, AGP_I915_MMADR,
498                                      sc->regs);
499         } else {
500                 bus_release_resource(dev, SYS_RES_MEMORY, AGP_I810_MMADR,
501                                      sc->regs);
502         }
503
504         return 0;
505 }
506
507 static u_int32_t
508 agp_i810_get_aperture(device_t dev)
509 {
510         struct agp_i810_softc *sc = device_get_softc(dev);
511         uint32_t temp;
512         u_int16_t miscc;
513
514         switch (sc->chiptype) {
515         case CHIP_I810:
516                 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
517                 if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32)
518                         return 32 * 1024 * 1024;
519                 else
520                         return 64 * 1024 * 1024;
521         case CHIP_I830:
522                 temp = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
523                 if ((temp & AGP_I830_GCC1_GMASIZE) == AGP_I830_GCC1_GMASIZE_64)
524                         return 64 * 1024 * 1024;
525                 else
526                         return 128 * 1024 * 1024;
527         case CHIP_I855:
528                 return 128 * 1024 * 1024;
529         case CHIP_I915:
530                 /* The documentation states that AGP_I915_MSAC should have bit
531                  * 1 set if the aperture is 128MB instead of 256.  However,
532                  * that bit appears to not get set, so we instead use the
533                  * aperture resource size, which should always be correct.
534                  */
535                 return rman_get_size(sc->gm);
536         }
537
538         return 0;
539 }
540
541 static int
542 agp_i810_set_aperture(device_t dev, u_int32_t aperture)
543 {
544         struct agp_i810_softc *sc = device_get_softc(dev);
545         u_int16_t miscc, gcc1;
546         u_int32_t temp;
547
548         switch (sc->chiptype) {
549         case CHIP_I810:
550                 /*
551                  * Double check for sanity.
552                  */
553                 if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
554                         device_printf(dev, "bad aperture size %d\n", aperture);
555                         return EINVAL;
556                 }
557
558                 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
559                 miscc &= ~AGP_I810_MISCC_WINSIZE;
560                 if (aperture == 32 * 1024 * 1024)
561                         miscc |= AGP_I810_MISCC_WINSIZE_32;
562                 else
563                         miscc |= AGP_I810_MISCC_WINSIZE_64;
564         
565                 pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);
566                 break;
567         case CHIP_I830:
568                 if (aperture != 64 * 1024 * 1024 &&
569                     aperture != 128 * 1024 * 1024) {
570                         device_printf(dev, "bad aperture size %d\n", aperture);
571                         return EINVAL;
572                 }
573                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
574                 gcc1 &= ~AGP_I830_GCC1_GMASIZE;
575                 if (aperture == 64 * 1024 * 1024)
576                         gcc1 |= AGP_I830_GCC1_GMASIZE_64;
577                 else
578                         gcc1 |= AGP_I830_GCC1_GMASIZE_128;
579
580                 pci_write_config(sc->bdev, AGP_I830_GCC1, gcc1, 2);
581                 break;
582         case CHIP_I855:
583                 if (aperture != 128 * 1024 * 1024) {
584                         device_printf(dev, "bad aperture size %d\n", aperture);
585                         return EINVAL;
586                 }
587                 break;
588         case CHIP_I915:
589                 temp = pci_read_config(dev, AGP_I915_MSAC, 1);
590                 temp &= ~AGP_I915_MSAC_GMASIZE;
591
592                 switch (aperture) {
593                 case 128 * 1024 * 1024:
594                         temp |= AGP_I915_MSAC_GMASIZE_128;
595                         break;
596                 case 256 * 1024 * 1024:
597                         temp |= AGP_I915_MSAC_GMASIZE_256;
598                         break;
599                 default:
600                         device_printf(dev, "bad aperture size %d\n", aperture);
601                         return EINVAL;
602                 }
603
604                 pci_write_config(dev, AGP_I915_MSAC, temp, 1);
605                 break;
606         }
607
608         return 0;
609 }
610
611 static int
612 agp_i810_bind_page(device_t dev, int offset, vm_offset_t physical)
613 {
614         struct agp_i810_softc *sc = device_get_softc(dev);
615
616         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) {
617                 device_printf(dev, "failed: offset is 0x%08x, shift is %d, entries is %d\n", offset, AGP_PAGE_SHIFT, sc->gatt->ag_entries);
618                 return EINVAL;
619         }
620
621         if ( sc->chiptype != CHIP_I810 ) {
622                 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
623                         device_printf(dev, "trying to bind into stolen memory");
624                         return EINVAL;
625                 }
626         }
627
628         if (sc->chiptype == CHIP_I915) {
629                 WRITEGTT((offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
630         } else {
631                 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
632         }
633
634         return 0;
635 }
636
637 static int
638 agp_i810_unbind_page(device_t dev, int offset)
639 {
640         struct agp_i810_softc *sc = device_get_softc(dev);
641
642         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
643                 return EINVAL;
644
645         if ( sc->chiptype != CHIP_I810 ) {
646                 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
647                         device_printf(dev, "trying to unbind from stolen memory");
648                         return EINVAL;
649                 }
650         }
651
652         if (sc->chiptype == CHIP_I915) {
653                 WRITEGTT((offset >> AGP_PAGE_SHIFT) * 4, 0);
654         } else {
655                 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, 0);
656         }
657         
658         return 0;
659 }
660
661 /*
662  * Writing via memory mapped registers already flushes all TLBs.
663  */
664 static void
665 agp_i810_flush_tlb(device_t dev)
666 {
667 }
668
669 static int
670 agp_i810_enable(device_t dev, u_int32_t mode)
671 {
672
673         return 0;
674 }
675
676 static struct agp_memory *
677 agp_i810_alloc_memory(device_t dev, int type, vm_size_t size)
678 {
679         struct agp_i810_softc *sc = device_get_softc(dev);
680         struct agp_memory *mem;
681
682         if ((size & (AGP_PAGE_SIZE - 1)) != 0)
683                 return 0;
684
685         if (sc->agp.as_allocated + size > sc->agp.as_maxmem)
686                 return 0;
687
688         if (type == 1) {
689                 /*
690                  * Mapping local DRAM into GATT.
691                  */
692                 if ( sc->chiptype != CHIP_I810 )
693                         return 0;
694                 if (size != sc->dcache_size)
695                         return 0;
696         } else if (type == 2) {
697                 /*
698                  * Type 2 is the contiguous physical memory type, that hands
699                  * back a physical address.  This is used for cursors on i810.
700                  * Hand back as many single pages with physical as the user
701                  * wants, but only allow one larger allocation (ARGB cursor)
702                  * for simplicity.
703                  */
704                 if (size != AGP_PAGE_SIZE) {
705                         if (sc->argb_cursor != NULL)
706                                 return 0;
707
708                         /* Allocate memory for ARGB cursor, if we can. */
709                         sc->argb_cursor = contigmalloc(size, M_AGP,
710                            0, 0, ~0, PAGE_SIZE, 0);
711                         if (sc->argb_cursor == NULL)
712                                 return 0;
713                 }
714         }
715
716         mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
717         mem->am_id = sc->agp.as_nextid++;
718         mem->am_size = size;
719         mem->am_type = type;
720         if (type != 1 && (type != 2 || size == AGP_PAGE_SIZE))
721                 mem->am_obj = vm_object_allocate(OBJT_DEFAULT,
722                                                  atop(round_page(size)));
723         else
724                 mem->am_obj = 0;
725
726         if (type == 2) {
727                 if (size == AGP_PAGE_SIZE) {
728                         /*
729                          * Allocate and wire down the page now so that we can
730                          * get its physical address.
731                          */
732                         vm_page_t m;
733         
734                         VM_OBJECT_LOCK(mem->am_obj);
735                         m = vm_page_grab(mem->am_obj, 0, VM_ALLOC_NOBUSY |
736                             VM_ALLOC_WIRED | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
737                         VM_OBJECT_UNLOCK(mem->am_obj);
738                         mem->am_physical = VM_PAGE_TO_PHYS(m);
739                 } else {
740                         /* Our allocation is already nicely wired down for us.
741                          * Just grab the physical address.
742                          */
743                         mem->am_physical = vtophys(sc->argb_cursor);
744                 }
745         } else {
746                 mem->am_physical = 0;
747         }
748
749         mem->am_offset = 0;
750         mem->am_is_bound = 0;
751         TAILQ_INSERT_TAIL(&sc->agp.as_memory, mem, am_link);
752         sc->agp.as_allocated += size;
753
754         return mem;
755 }
756
757 static int
758 agp_i810_free_memory(device_t dev, struct agp_memory *mem)
759 {
760         struct agp_i810_softc *sc = device_get_softc(dev);
761
762         if (mem->am_is_bound)
763                 return EBUSY;
764
765         if (mem->am_type == 2) {
766                 if (mem->am_size == AGP_PAGE_SIZE) {
767                         /*
768                          * Unwire the page which we wired in alloc_memory.
769                          */
770                         vm_page_t m;
771         
772                         VM_OBJECT_LOCK(mem->am_obj);
773                         m = vm_page_lookup(mem->am_obj, 0);
774                         VM_OBJECT_UNLOCK(mem->am_obj);
775                         vm_page_lock_queues();
776                         vm_page_unwire(m, 0);
777                         vm_page_unlock_queues();
778                 } else {
779                         contigfree(sc->argb_cursor, mem->am_size, M_AGP);
780                         sc->argb_cursor = NULL;
781                 }
782         }
783
784         sc->agp.as_allocated -= mem->am_size;
785         TAILQ_REMOVE(&sc->agp.as_memory, mem, am_link);
786         if (mem->am_obj)
787                 vm_object_deallocate(mem->am_obj);
788         free(mem, M_AGP);
789         return 0;
790 }
791
792 static int
793 agp_i810_bind_memory(device_t dev, struct agp_memory *mem,
794                      vm_offset_t offset)
795 {
796         struct agp_i810_softc *sc = device_get_softc(dev);
797         vm_offset_t i;
798
799         /* Do some sanity checks first. */
800         if (offset < 0 || (offset & (AGP_PAGE_SIZE - 1)) != 0 ||
801             offset + mem->am_size > AGP_GET_APERTURE(dev)) {
802                 device_printf(dev, "binding memory at bad offset %#x\n",
803                     (int)offset);
804                 return EINVAL;
805         }
806
807         if (mem->am_type == 2 && mem->am_size != AGP_PAGE_SIZE) {
808                 mtx_lock(&sc->agp.as_lock);
809                 if (mem->am_is_bound) {
810                         mtx_unlock(&sc->agp.as_lock);
811                         return EINVAL;
812                 }
813                 /* The memory's already wired down, just stick it in the GTT. */
814                 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
815                         u_int32_t physical = mem->am_physical + i;
816
817                         if (sc->chiptype == CHIP_I915) {
818                                 WRITEGTT(((offset + i) >> AGP_PAGE_SHIFT) * 4,
819                                     physical | 1);
820                         } else {
821                                 WRITE4(AGP_I810_GTT +
822                                     ((offset + i) >> AGP_PAGE_SHIFT) * 4,
823                                     physical | 1);
824                         }
825                 }
826                 agp_flush_cache();
827                 mem->am_offset = offset;
828                 mem->am_is_bound = 1;
829                 mtx_unlock(&sc->agp.as_lock);
830                 return 0;
831         }
832
833         if (mem->am_type != 1)
834                 return agp_generic_bind_memory(dev, mem, offset);
835
836         if ( sc->chiptype != CHIP_I810 )
837                 return EINVAL;
838
839         for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
840                 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4,
841                        i | 3);
842         }
843
844         return 0;
845 }
846
847 static int
848 agp_i810_unbind_memory(device_t dev, struct agp_memory *mem)
849 {
850         struct agp_i810_softc *sc = device_get_softc(dev);
851         vm_offset_t i;
852
853         if (mem->am_type == 2 && mem->am_size != AGP_PAGE_SIZE) {
854                 mtx_lock(&sc->agp.as_lock);
855                 if (!mem->am_is_bound) {
856                         mtx_unlock(&sc->agp.as_lock);
857                         return EINVAL;
858                 }
859
860                 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
861                         vm_offset_t offset = mem->am_offset;
862
863                         if (sc->chiptype == CHIP_I915) {
864                                 WRITEGTT(((offset + i) >> AGP_PAGE_SHIFT) * 4,
865                                     0);
866                         } else {
867                                 WRITE4(AGP_I810_GTT +
868                                     ((offset + i) >> AGP_PAGE_SHIFT) * 4, 0);
869                         }
870                 }
871                 agp_flush_cache();
872                 mem->am_is_bound = 0;
873                 mtx_unlock(&sc->agp.as_lock);
874                 return 0;
875         }
876
877         if (mem->am_type != 1)
878                 return agp_generic_unbind_memory(dev, mem);
879
880         if ( sc->chiptype != CHIP_I810 )
881                 return EINVAL;
882
883         for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
884                 WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
885
886         return 0;
887 }
888
889 static device_method_t agp_i810_methods[] = {
890         /* Device interface */
891         DEVMETHOD(device_identify,      agp_i810_identify),
892         DEVMETHOD(device_probe,         agp_i810_probe),
893         DEVMETHOD(device_attach,        agp_i810_attach),
894         DEVMETHOD(device_detach,        agp_i810_detach),
895
896         /* AGP interface */
897         DEVMETHOD(agp_get_aperture,     agp_i810_get_aperture),
898         DEVMETHOD(agp_set_aperture,     agp_i810_set_aperture),
899         DEVMETHOD(agp_bind_page,        agp_i810_bind_page),
900         DEVMETHOD(agp_unbind_page,      agp_i810_unbind_page),
901         DEVMETHOD(agp_flush_tlb,        agp_i810_flush_tlb),
902         DEVMETHOD(agp_enable,           agp_i810_enable),
903         DEVMETHOD(agp_alloc_memory,     agp_i810_alloc_memory),
904         DEVMETHOD(agp_free_memory,      agp_i810_free_memory),
905         DEVMETHOD(agp_bind_memory,      agp_i810_bind_memory),
906         DEVMETHOD(agp_unbind_memory,    agp_i810_unbind_memory),
907
908         { 0, 0 }
909 };
910
911 static driver_t agp_i810_driver = {
912         "agp",
913         agp_i810_methods,
914         sizeof(struct agp_i810_softc),
915 };
916
917 static devclass_t agp_devclass;
918
919 DRIVER_MODULE(agp_i810, vgapci, agp_i810_driver, agp_devclass, 0, 0);
920 MODULE_DEPEND(agp_i810, agp, 1, 1, 1);
921 MODULE_DEPEND(agp_i810, pci, 1, 1, 1);