FreeBSD/Linux Kernel Cross Reference
sys/pci/agp_i810.c
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 <machine/md_var.h>
62 #include <sys/rman.h>
63
64 MALLOC_DECLARE(M_AGP);
65
66 enum {
67 CHIP_I810, /* i810/i815 */
68 CHIP_I830, /* 830M/845G */
69 CHIP_I855, /* 852GM/855GM/865G */
70 CHIP_I915, /* 915G/915GM */
71 CHIP_I965, /* G965 */
72 CHIP_G33, /* G33/Q33/Q35 */
73 };
74
75 /* The i810 through i855 have the registers at BAR 1, and the GATT gets
76 * allocated by us. The i915 has registers in BAR 0 and the GATT is at the
77 * start of the stolen memory, and should only be accessed by the OS through
78 * BAR 3. The G965 has registers and GATT in the same BAR (0) -- first 512KB
79 * is registers, second 512KB is GATT.
80 */
81 static struct resource_spec agp_i810_res_spec[] = {
82 { SYS_RES_MEMORY, AGP_I810_MMADR, RF_ACTIVE | RF_SHAREABLE },
83 { -1, 0 }
84 };
85
86 static struct resource_spec agp_i915_res_spec[] = {
87 { SYS_RES_MEMORY, AGP_I915_MMADR, RF_ACTIVE | RF_SHAREABLE },
88 { SYS_RES_MEMORY, AGP_I915_GTTADR, RF_ACTIVE | RF_SHAREABLE },
89 { -1, 0 }
90 };
91
92 static struct resource_spec agp_i965_res_spec[] = {
93 { SYS_RES_MEMORY, AGP_I965_GTTMMADR, RF_ACTIVE | RF_SHAREABLE },
94 { -1, 0 }
95 };
96
97 struct agp_i810_softc {
98 struct agp_softc agp;
99 u_int32_t initial_aperture; /* aperture size at startup */
100 struct agp_gatt *gatt;
101 int chiptype; /* i810-like or i830 */
102 u_int32_t dcache_size; /* i810 only */
103 u_int32_t stolen; /* number of i830/845 gtt entries for stolen memory */
104 device_t bdev; /* bridge device */
105
106 void *argb_cursor; /* contigmalloc area for ARGB cursor */
107
108 struct resource_spec * sc_res_spec;
109 struct resource *sc_res[2];
110 };
111
112 /* For adding new devices, devid is the id of the graphics controller
113 * (pci:0:2:0, for example). The placeholder (usually at pci:0:2:1) for the
114 * second head should never be added. The bridge_offset is the offset to
115 * subtract from devid to get the id of the hostb that the device is on.
116 */
117 static const struct agp_i810_match {
118 int devid;
119 int chiptype;
120 int bridge_offset;
121 char *name;
122 } agp_i810_matches[] = {
123 {0x71218086, CHIP_I810, 0x00010000,
124 "Intel 82810 (i810 GMCH) SVGA controller"},
125 {0x71238086, CHIP_I810, 0x00010000,
126 "Intel 82810-DC100 (i810-DC100 GMCH) SVGA controller"},
127 {0x71258086, CHIP_I810, 0x00010000,
128 "Intel 82810E (i810E GMCH) SVGA controller"},
129 {0x11328086, CHIP_I810, 0x00020000,
130 "Intel 82815 (i815 GMCH) SVGA controller"},
131 {0x35778086, CHIP_I830, 0x00020000,
132 "Intel 82830M (830M GMCH) SVGA controller"},
133 {0x25628086, CHIP_I830, 0x00020000,
134 "Intel 82845M (845M GMCH) SVGA controller"},
135 {0x35828086, CHIP_I855, 0x00020000,
136 "Intel 82852/5"},
137 {0x25728086, CHIP_I855, 0x00020000,
138 "Intel 82865G (865G GMCH) SVGA controller"},
139 {0x25828086, CHIP_I915, 0x00020000,
140 "Intel 82915G (915G GMCH) SVGA controller"},
141 {0x258A8086, CHIP_I915, 0x00020000,
142 "Intel E7221 SVGA controller"},
143 {0x25928086, CHIP_I915, 0x00020000,
144 "Intel 82915GM (915GM GMCH) SVGA controller"},
145 {0x27728086, CHIP_I915, 0x00020000,
146 "Intel 82945G (945G GMCH) SVGA controller"},
147 {0x27A28086, CHIP_I915, 0x00020000,
148 "Intel 82945GM (945GM GMCH) SVGA controller"},
149 {0x27A28086, CHIP_I915, 0x00020000,
150 "Intel 945GME SVGA controller"},
151 {0x29728086, CHIP_I965, 0x00020000,
152 "Intel 946GZ SVGA controller"},
153 {0x29828086, CHIP_I965, 0x00020000,
154 "Intel G965 SVGA controller"},
155 {0x29928086, CHIP_I965, 0x00020000,
156 "Intel Q965 SVGA controller"},
157 {0x29a28086, CHIP_I965, 0x00020000,
158 "Intel G965 SVGA controller"},
159 /*
160 {0x29b28086, CHIP_G33, 0x00020000,
161 "Intel Q35 SVGA controller"},
162 {0x29c28086, CHIP_G33, 0x00020000,
163 "Intel G33 SVGA controller"},
164 {0x29d28086, CHIP_G33, 0x00020000,
165 "Intel Q33 SVGA controller"},
166 */
167 {0x2a028086, CHIP_I965, 0x00020000,
168 "Intel GM965 SVGA controller"},
169 {0x2a128086, CHIP_I965, 0x00020000,
170 "Intel GME965 SVGA controller"},
171 {0, 0, 0, NULL}
172 };
173
174 static const struct agp_i810_match*
175 agp_i810_match(device_t dev)
176 {
177 int i, devid;
178
179 if (pci_get_class(dev) != PCIC_DISPLAY
180 || pci_get_subclass(dev) != PCIS_DISPLAY_VGA)
181 return NULL;
182
183 devid = pci_get_devid(dev);
184 for (i = 0; agp_i810_matches[i].devid != 0; i++) {
185 if (agp_i810_matches[i].devid == devid)
186 break;
187 }
188 if (agp_i810_matches[i].devid == 0)
189 return NULL;
190 else
191 return &agp_i810_matches[i];
192 }
193
194 /*
195 * Find bridge device.
196 */
197 static device_t
198 agp_i810_find_bridge(device_t dev)
199 {
200 device_t *children, child;
201 int nchildren, i;
202 u_int32_t devid;
203 const struct agp_i810_match *match;
204
205 match = agp_i810_match(dev);
206 devid = match->devid - match->bridge_offset;
207
208 if (device_get_children(device_get_parent(device_get_parent(dev)),
209 &children, &nchildren))
210 return 0;
211
212 for (i = 0; i < nchildren; i++) {
213 child = children[i];
214
215 if (pci_get_devid(child) == devid) {
216 free(children, M_TEMP);
217 return child;
218 }
219 }
220 free(children, M_TEMP);
221 return 0;
222 }
223
224 static void
225 agp_i810_identify(driver_t *driver, device_t parent)
226 {
227
228 if (device_find_child(parent, "agp", -1) == NULL &&
229 agp_i810_match(parent))
230 device_add_child(parent, "agp", -1);
231 }
232
233 static int
234 agp_i810_probe(device_t dev)
235 {
236 device_t bdev;
237 const struct agp_i810_match *match;
238 u_int8_t smram;
239 int gcc1, deven;
240
241 if (resource_disabled("agp", device_get_unit(dev)))
242 return (ENXIO);
243 match = agp_i810_match(dev);
244 if (match == NULL)
245 return ENXIO;
246
247 bdev = agp_i810_find_bridge(dev);
248 if (!bdev) {
249 if (bootverbose)
250 printf("I810: can't find bridge device\n");
251 return ENXIO;
252 }
253
254 /*
255 * checking whether internal graphics device has been activated.
256 */
257 switch (match->chiptype) {
258 case CHIP_I810:
259 smram = pci_read_config(bdev, AGP_I810_SMRAM, 1);
260 if ((smram & AGP_I810_SMRAM_GMS) ==
261 AGP_I810_SMRAM_GMS_DISABLED) {
262 if (bootverbose)
263 printf("I810: disabled, not probing\n");
264 return ENXIO;
265 }
266 break;
267 case CHIP_I830:
268 case CHIP_I855:
269 gcc1 = pci_read_config(bdev, AGP_I830_GCC1, 1);
270 if ((gcc1 & AGP_I830_GCC1_DEV2) ==
271 AGP_I830_GCC1_DEV2_DISABLED) {
272 if (bootverbose)
273 printf("I830: disabled, not probing\n");
274 return ENXIO;
275 }
276 break;
277 case CHIP_I915:
278 case CHIP_I965:
279 case CHIP_G33:
280 deven = pci_read_config(bdev, AGP_I915_DEVEN, 4);
281 if ((deven & AGP_I915_DEVEN_D2F0) ==
282 AGP_I915_DEVEN_D2F0_DISABLED) {
283 if (bootverbose)
284 printf("I915: disabled, not probing\n");
285 return ENXIO;
286 }
287 break;
288 }
289
290 if (match->devid == 0x35828086) {
291 switch (pci_read_config(dev, AGP_I85X_CAPID, 1)) {
292 case AGP_I855_GME:
293 device_set_desc(dev,
294 "Intel 82855GME (855GME GMCH) SVGA controller");
295 break;
296 case AGP_I855_GM:
297 device_set_desc(dev,
298 "Intel 82855GM (855GM GMCH) SVGA controller");
299 break;
300 case AGP_I852_GME:
301 device_set_desc(dev,
302 "Intel 82852GME (852GME GMCH) SVGA controller");
303 break;
304 case AGP_I852_GM:
305 device_set_desc(dev,
306 "Intel 82852GM (852GM GMCH) SVGA controller");
307 break;
308 default:
309 device_set_desc(dev,
310 "Intel 8285xM (85xGM GMCH) SVGA controller");
311 break;
312 }
313 } else {
314 device_set_desc(dev, match->name);
315 }
316
317 return BUS_PROBE_DEFAULT;
318 }
319
320 static void
321 agp_i810_dump_regs(device_t dev)
322 {
323 struct agp_i810_softc *sc = device_get_softc(dev);
324
325 device_printf(dev, "AGP_I810_PGTBL_CTL: %08x\n",
326 bus_read_4(sc->sc_res[0], AGP_I810_PGTBL_CTL));
327
328 switch (sc->chiptype) {
329 case CHIP_I810:
330 device_printf(dev, "AGP_I810_MISCC: 0x%04x\n",
331 pci_read_config(sc->bdev, AGP_I810_MISCC, 2));
332 break;
333 case CHIP_I830:
334 device_printf(dev, "AGP_I830_GCC1: 0x%02x\n",
335 pci_read_config(sc->bdev, AGP_I830_GCC1, 1));
336 break;
337 case CHIP_I855:
338 device_printf(dev, "AGP_I855_GCC1: 0x%02x\n",
339 pci_read_config(sc->bdev, AGP_I855_GCC1, 1));
340 break;
341 case CHIP_I915:
342 case CHIP_I965:
343 case CHIP_G33:
344 device_printf(dev, "AGP_I855_GCC1: 0x%02x\n",
345 pci_read_config(sc->bdev, AGP_I855_GCC1, 1));
346 device_printf(dev, "AGP_I915_MSAC: 0x%02x\n",
347 pci_read_config(sc->bdev, AGP_I915_MSAC, 1));
348 break;
349 }
350 device_printf(dev, "Aperture resource size: %d bytes\n",
351 AGP_GET_APERTURE(dev));
352 }
353
354 static int
355 agp_i810_attach(device_t dev)
356 {
357 struct agp_i810_softc *sc = device_get_softc(dev);
358 struct agp_gatt *gatt;
359 const struct agp_i810_match *match;
360 int error;
361
362 sc->bdev = agp_i810_find_bridge(dev);
363 if (!sc->bdev)
364 return ENOENT;
365
366 match = agp_i810_match(dev);
367 sc->chiptype = match->chiptype;
368
369 switch (sc->chiptype) {
370 case CHIP_I810:
371 case CHIP_I830:
372 case CHIP_I855:
373 sc->sc_res_spec = agp_i810_res_spec;
374 agp_set_aperture_resource(dev, AGP_APBASE);
375 break;
376 case CHIP_I915:
377 case CHIP_G33:
378 sc->sc_res_spec = agp_i915_res_spec;
379 agp_set_aperture_resource(dev, AGP_I915_GMADR);
380 break;
381 case CHIP_I965:
382 sc->sc_res_spec = agp_i965_res_spec;
383 agp_set_aperture_resource(dev, AGP_I915_GMADR);
384 break;
385 }
386
387 error = agp_generic_attach(dev);
388 if (error)
389 return error;
390
391 if (sc->chiptype != CHIP_I965 && sc->chiptype != CHIP_G33 &&
392 ptoa((vm_paddr_t)Maxmem) > 0xfffffffful)
393 {
394 device_printf(dev, "agp_i810.c does not support physical "
395 "memory above 4GB.\n");
396 return ENOENT;
397 }
398
399 if (bus_alloc_resources(dev, sc->sc_res_spec, sc->sc_res)) {
400 agp_generic_detach(dev);
401 return ENODEV;
402 }
403
404 sc->initial_aperture = AGP_GET_APERTURE(dev);
405
406 gatt = malloc( sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
407 if (!gatt) {
408 bus_release_resources(dev, sc->sc_res_spec, sc->sc_res);
409 agp_generic_detach(dev);
410 return ENOMEM;
411 }
412 sc->gatt = gatt;
413
414 gatt->ag_entries = AGP_GET_APERTURE(dev) >> AGP_PAGE_SHIFT;
415
416 if ( sc->chiptype == CHIP_I810 ) {
417 /* Some i810s have on-chip memory called dcache */
418 if (bus_read_1(sc->sc_res[0], AGP_I810_DRT) &
419 AGP_I810_DRT_POPULATED)
420 sc->dcache_size = 4 * 1024 * 1024;
421 else
422 sc->dcache_size = 0;
423
424 /* According to the specs the gatt on the i810 must be 64k */
425 gatt->ag_virtual = contigmalloc( 64 * 1024, M_AGP, 0,
426 0, ~0, PAGE_SIZE, 0);
427 if (!gatt->ag_virtual) {
428 if (bootverbose)
429 device_printf(dev, "contiguous allocation failed\n");
430 bus_release_resources(dev, sc->sc_res_spec,
431 sc->sc_res);
432 free(gatt, M_AGP);
433 agp_generic_detach(dev);
434 return ENOMEM;
435 }
436 bzero(gatt->ag_virtual, gatt->ag_entries * sizeof(u_int32_t));
437
438 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
439 agp_flush_cache();
440 /* Install the GATT. */
441 bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL,
442 gatt->ag_physical | 1);
443 } else if ( sc->chiptype == CHIP_I830 ) {
444 /* The i830 automatically initializes the 128k gatt on boot. */
445 unsigned int gcc1, pgtblctl;
446
447 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 1);
448 switch (gcc1 & AGP_I830_GCC1_GMS) {
449 case AGP_I830_GCC1_GMS_STOLEN_512:
450 sc->stolen = (512 - 132) * 1024 / 4096;
451 break;
452 case AGP_I830_GCC1_GMS_STOLEN_1024:
453 sc->stolen = (1024 - 132) * 1024 / 4096;
454 break;
455 case AGP_I830_GCC1_GMS_STOLEN_8192:
456 sc->stolen = (8192 - 132) * 1024 / 4096;
457 break;
458 default:
459 sc->stolen = 0;
460 device_printf(dev, "unknown memory configuration, disabling\n");
461 bus_release_resources(dev, sc->sc_res_spec,
462 sc->sc_res);
463 free(gatt, M_AGP);
464 agp_generic_detach(dev);
465 return EINVAL;
466 }
467 if (sc->stolen > 0) {
468 device_printf(dev, "detected %dk stolen memory\n",
469 sc->stolen * 4);
470 }
471 device_printf(dev, "aperture size is %dM\n",
472 sc->initial_aperture / 1024 / 1024);
473
474 /* GATT address is already in there, make sure it's enabled */
475 pgtblctl = bus_read_4(sc->sc_res[0], AGP_I810_PGTBL_CTL);
476 pgtblctl |= 1;
477 bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL, pgtblctl);
478
479 gatt->ag_physical = pgtblctl & ~1;
480 } else if (sc->chiptype == CHIP_I855 || sc->chiptype == CHIP_I915 ||
481 sc->chiptype == CHIP_I965 || sc->chiptype == CHIP_G33) {
482 unsigned int gcc1, pgtblctl, stolen, gtt_size;
483
484 /* Stolen memory is set up at the beginning of the aperture by
485 * the BIOS, consisting of the GATT followed by 4kb for the
486 * BIOS display.
487 */
488 switch (sc->chiptype) {
489 case CHIP_I855:
490 gtt_size = 128;
491 break;
492 case CHIP_I915:
493 gtt_size = 256;
494 break;
495 case CHIP_I965:
496 case CHIP_G33:
497 switch (bus_read_4(sc->sc_res[0], AGP_I810_PGTBL_CTL) &
498 AGP_I810_PGTBL_SIZE_MASK) {
499 case AGP_I810_PGTBL_SIZE_128KB:
500 gtt_size = 128;
501 break;
502 case AGP_I810_PGTBL_SIZE_256KB:
503 gtt_size = 256;
504 break;
505 case AGP_I810_PGTBL_SIZE_512KB:
506 gtt_size = 512;
507 break;
508 default:
509 device_printf(dev, "Bad PGTBL size\n");
510 bus_release_resources(dev, sc->sc_res_spec,
511 sc->sc_res);
512 free(gatt, M_AGP);
513 agp_generic_detach(dev);
514 return EINVAL;
515 }
516 break;
517 default:
518 device_printf(dev, "Bad chiptype\n");
519 bus_release_resources(dev, sc->sc_res_spec,
520 sc->sc_res);
521 free(gatt, M_AGP);
522 agp_generic_detach(dev);
523 return EINVAL;
524 }
525
526 /* GCC1 is called MGGC on i915+ */
527 gcc1 = pci_read_config(sc->bdev, AGP_I855_GCC1, 1);
528 switch (gcc1 & AGP_I855_GCC1_GMS) {
529 case AGP_I855_GCC1_GMS_STOLEN_1M:
530 stolen = 1024;
531 break;
532 case AGP_I855_GCC1_GMS_STOLEN_4M:
533 stolen = 4096;
534 break;
535 case AGP_I855_GCC1_GMS_STOLEN_8M:
536 stolen = 8192;
537 break;
538 case AGP_I855_GCC1_GMS_STOLEN_16M:
539 stolen = 16384;
540 break;
541 case AGP_I855_GCC1_GMS_STOLEN_32M:
542 stolen = 32768;
543 break;
544 case AGP_I915_GCC1_GMS_STOLEN_48M:
545 stolen = 49152;
546 break;
547 case AGP_I915_GCC1_GMS_STOLEN_64M:
548 stolen = 65536;
549 break;
550 case AGP_G33_GCC1_GMS_STOLEN_128M:
551 stolen = 128 * 1024;
552 break;
553 case AGP_G33_GCC1_GMS_STOLEN_256M:
554 stolen = 256 * 1024;
555 break;
556 default:
557 device_printf(dev, "unknown memory configuration, "
558 "disabling\n");
559 bus_release_resources(dev, sc->sc_res_spec,
560 sc->sc_res);
561 free(gatt, M_AGP);
562 agp_generic_detach(dev);
563 return EINVAL;
564 }
565 sc->stolen = (stolen - gtt_size - 4) * 1024 / 4096;
566 if (sc->stolen > 0)
567 device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
568 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
569
570 /* GATT address is already in there, make sure it's enabled */
571 pgtblctl = bus_read_4(sc->sc_res[0], AGP_I810_PGTBL_CTL);
572 pgtblctl |= 1;
573 bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL, pgtblctl);
574
575 gatt->ag_physical = pgtblctl & ~1;
576 }
577
578 if (0)
579 agp_i810_dump_regs(dev);
580
581 return 0;
582 }
583
584 static int
585 agp_i810_detach(device_t dev)
586 {
587 struct agp_i810_softc *sc = device_get_softc(dev);
588
589 agp_free_cdev(dev);
590
591 /* Clear the GATT base. */
592 if ( sc->chiptype == CHIP_I810 ) {
593 bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL, 0);
594 } else {
595 unsigned int pgtblctl;
596 pgtblctl = bus_read_4(sc->sc_res[0], AGP_I810_PGTBL_CTL);
597 pgtblctl &= ~1;
598 bus_write_4(sc->sc_res[0], AGP_I810_PGTBL_CTL, pgtblctl);
599 }
600
601 /* Put the aperture back the way it started. */
602 AGP_SET_APERTURE(dev, sc->initial_aperture);
603
604 if ( sc->chiptype == CHIP_I810 ) {
605 contigfree(sc->gatt->ag_virtual, 64 * 1024, M_AGP);
606 }
607 free(sc->gatt, M_AGP);
608
609 bus_release_resources(dev, sc->sc_res_spec, sc->sc_res);
610 agp_free_res(dev);
611
612 return 0;
613 }
614
615 /**
616 * Sets the PCI resource size of the aperture on i830-class and below chipsets,
617 * while returning failure on later chipsets when an actual change is
618 * requested.
619 *
620 * This whole function is likely bogus, as the kernel would probably need to
621 * reconfigure the placement of the AGP aperture if a larger size is requested,
622 * which doesn't happen currently.
623 */
624 static int
625 agp_i810_set_aperture(device_t dev, u_int32_t aperture)
626 {
627 struct agp_i810_softc *sc = device_get_softc(dev);
628 u_int16_t miscc, gcc1;
629
630 switch (sc->chiptype) {
631 case CHIP_I810:
632 /*
633 * Double check for sanity.
634 */
635 if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
636 device_printf(dev, "bad aperture size %d\n", aperture);
637 return EINVAL;
638 }
639
640 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
641 miscc &= ~AGP_I810_MISCC_WINSIZE;
642 if (aperture == 32 * 1024 * 1024)
643 miscc |= AGP_I810_MISCC_WINSIZE_32;
644 else
645 miscc |= AGP_I810_MISCC_WINSIZE_64;
646
647 pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);
648 break;
649 case CHIP_I830:
650 if (aperture != 64 * 1024 * 1024 &&
651 aperture != 128 * 1024 * 1024) {
652 device_printf(dev, "bad aperture size %d\n", aperture);
653 return EINVAL;
654 }
655 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
656 gcc1 &= ~AGP_I830_GCC1_GMASIZE;
657 if (aperture == 64 * 1024 * 1024)
658 gcc1 |= AGP_I830_GCC1_GMASIZE_64;
659 else
660 gcc1 |= AGP_I830_GCC1_GMASIZE_128;
661
662 pci_write_config(sc->bdev, AGP_I830_GCC1, gcc1, 2);
663 break;
664 case CHIP_I855:
665 case CHIP_I915:
666 case CHIP_I965:
667 case CHIP_G33:
668 return agp_generic_set_aperture(dev, aperture);
669 }
670
671 return 0;
672 }
673
674 /**
675 * Writes a GTT entry mapping the page at the given offset from the beginning
676 * of the aperture to the given physical address.
677 */
678 static void
679 agp_i810_write_gtt_entry(device_t dev, int offset, vm_offset_t physical,
680 int enabled)
681 {
682 struct agp_i810_softc *sc = device_get_softc(dev);
683 u_int32_t pte;
684
685 pte = (u_int32_t)physical | 1;
686 if (sc->chiptype == CHIP_I965 || sc->chiptype == CHIP_G33) {
687 pte |= (physical & 0x0000000f00000000ull) >> 28;
688 } else {
689 /* If we do actually have memory above 4GB on an older system,
690 * crash cleanly rather than scribble on system memory,
691 * so we know we need to fix it.
692 */
693 KASSERT((pte & 0x0000000f00000000ull) == 0,
694 (">4GB physical address in agp"));
695 }
696
697 switch (sc->chiptype) {
698 case CHIP_I810:
699 case CHIP_I830:
700 case CHIP_I855:
701 bus_write_4(sc->sc_res[0],
702 AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, pte);
703 break;
704 case CHIP_I915:
705 case CHIP_G33:
706 bus_write_4(sc->sc_res[1],
707 (offset >> AGP_PAGE_SHIFT) * 4, pte);
708 break;
709 case CHIP_I965:
710 bus_write_4(sc->sc_res[0],
711 (offset >> AGP_PAGE_SHIFT) * 4 + (512 * 1024), pte);
712 break;
713 }
714 }
715
716 static int
717 agp_i810_bind_page(device_t dev, int offset, vm_offset_t physical)
718 {
719 struct agp_i810_softc *sc = device_get_softc(dev);
720
721 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) {
722 device_printf(dev, "failed: offset is 0x%08x, shift is %d, entries is %d\n", offset, AGP_PAGE_SHIFT, sc->gatt->ag_entries);
723 return EINVAL;
724 }
725
726 if ( sc->chiptype != CHIP_I810 ) {
727 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
728 device_printf(dev, "trying to bind into stolen memory");
729 return EINVAL;
730 }
731 }
732
733 agp_i810_write_gtt_entry(dev, offset, physical, 1);
734
735 return 0;
736 }
737
738 static int
739 agp_i810_unbind_page(device_t dev, int offset)
740 {
741 struct agp_i810_softc *sc = device_get_softc(dev);
742
743 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
744 return EINVAL;
745
746 if ( sc->chiptype != CHIP_I810 ) {
747 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
748 device_printf(dev, "trying to unbind from stolen memory");
749 return EINVAL;
750 }
751 }
752
753 agp_i810_write_gtt_entry(dev, offset, 0, 0);
754
755 return 0;
756 }
757
758 /*
759 * Writing via memory mapped registers already flushes all TLBs.
760 */
761 static void
762 agp_i810_flush_tlb(device_t dev)
763 {
764 }
765
766 static int
767 agp_i810_enable(device_t dev, u_int32_t mode)
768 {
769
770 return 0;
771 }
772
773 static struct agp_memory *
774 agp_i810_alloc_memory(device_t dev, int type, vm_size_t size)
775 {
776 struct agp_i810_softc *sc = device_get_softc(dev);
777 struct agp_memory *mem;
778
779 if ((size & (AGP_PAGE_SIZE - 1)) != 0)
780 return 0;
781
782 if (sc->agp.as_allocated + size > sc->agp.as_maxmem)
783 return 0;
784
785 if (type == 1) {
786 /*
787 * Mapping local DRAM into GATT.
788 */
789 if ( sc->chiptype != CHIP_I810 )
790 return 0;
791 if (size != sc->dcache_size)
792 return 0;
793 } else if (type == 2) {
794 /*
795 * Type 2 is the contiguous physical memory type, that hands
796 * back a physical address. This is used for cursors on i810.
797 * Hand back as many single pages with physical as the user
798 * wants, but only allow one larger allocation (ARGB cursor)
799 * for simplicity.
800 */
801 if (size != AGP_PAGE_SIZE) {
802 if (sc->argb_cursor != NULL)
803 return 0;
804
805 /* Allocate memory for ARGB cursor, if we can. */
806 sc->argb_cursor = contigmalloc(size, M_AGP,
807 0, 0, ~0, PAGE_SIZE, 0);
808 if (sc->argb_cursor == NULL)
809 return 0;
810 }
811 }
812
813 mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
814 mem->am_id = sc->agp.as_nextid++;
815 mem->am_size = size;
816 mem->am_type = type;
817 if (type != 1 && (type != 2 || size == AGP_PAGE_SIZE))
818 mem->am_obj = vm_object_allocate(OBJT_DEFAULT,
819 atop(round_page(size)));
820 else
821 mem->am_obj = 0;
822
823 if (type == 2) {
824 if (size == AGP_PAGE_SIZE) {
825 /*
826 * Allocate and wire down the page now so that we can
827 * get its physical address.
828 */
829 vm_page_t m;
830
831 VM_OBJECT_LOCK(mem->am_obj);
832 m = vm_page_grab(mem->am_obj, 0, VM_ALLOC_NOBUSY |
833 VM_ALLOC_WIRED | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
834 VM_OBJECT_UNLOCK(mem->am_obj);
835 mem->am_physical = VM_PAGE_TO_PHYS(m);
836 } else {
837 /* Our allocation is already nicely wired down for us.
838 * Just grab the physical address.
839 */
840 mem->am_physical = vtophys(sc->argb_cursor);
841 }
842 } else {
843 mem->am_physical = 0;
844 }
845
846 mem->am_offset = 0;
847 mem->am_is_bound = 0;
848 TAILQ_INSERT_TAIL(&sc->agp.as_memory, mem, am_link);
849 sc->agp.as_allocated += size;
850
851 return mem;
852 }
853
854 static int
855 agp_i810_free_memory(device_t dev, struct agp_memory *mem)
856 {
857 struct agp_i810_softc *sc = device_get_softc(dev);
858
859 if (mem->am_is_bound)
860 return EBUSY;
861
862 if (mem->am_type == 2) {
863 if (mem->am_size == AGP_PAGE_SIZE) {
864 /*
865 * Unwire the page which we wired in alloc_memory.
866 */
867 vm_page_t m;
868
869 VM_OBJECT_LOCK(mem->am_obj);
870 m = vm_page_lookup(mem->am_obj, 0);
871 VM_OBJECT_UNLOCK(mem->am_obj);
872 vm_page_lock_queues();
873 vm_page_unwire(m, 0);
874 vm_page_unlock_queues();
875 } else {
876 contigfree(sc->argb_cursor, mem->am_size, M_AGP);
877 sc->argb_cursor = NULL;
878 }
879 }
880
881 sc->agp.as_allocated -= mem->am_size;
882 TAILQ_REMOVE(&sc->agp.as_memory, mem, am_link);
883 if (mem->am_obj)
884 vm_object_deallocate(mem->am_obj);
885 free(mem, M_AGP);
886 return 0;
887 }
888
889 static int
890 agp_i810_bind_memory(device_t dev, struct agp_memory *mem,
891 vm_offset_t offset)
892 {
893 struct agp_i810_softc *sc = device_get_softc(dev);
894 vm_offset_t i;
895
896 /* Do some sanity checks first. */
897 if (offset < 0 || (offset & (AGP_PAGE_SIZE - 1)) != 0 ||
898 offset + mem->am_size > AGP_GET_APERTURE(dev)) {
899 device_printf(dev, "binding memory at bad offset %#x\n",
900 (int)offset);
901 return EINVAL;
902 }
903
904 if (mem->am_type == 2 && mem->am_size != AGP_PAGE_SIZE) {
905 mtx_lock(&sc->agp.as_lock);
906 if (mem->am_is_bound) {
907 mtx_unlock(&sc->agp.as_lock);
908 return EINVAL;
909 }
910 /* The memory's already wired down, just stick it in the GTT. */
911 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
912 agp_i810_write_gtt_entry(dev, offset + i,
913 mem->am_physical + i, 1);
914 }
915 agp_flush_cache();
916 mem->am_offset = offset;
917 mem->am_is_bound = 1;
918 mtx_unlock(&sc->agp.as_lock);
919 return 0;
920 }
921
922 if (mem->am_type != 1)
923 return agp_generic_bind_memory(dev, mem, offset);
924
925 if ( sc->chiptype != CHIP_I810 )
926 return EINVAL;
927
928 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
929 bus_write_4(sc->sc_res[0],
930 AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, i | 3);
931 }
932
933 return 0;
934 }
935
936 static int
937 agp_i810_unbind_memory(device_t dev, struct agp_memory *mem)
938 {
939 struct agp_i810_softc *sc = device_get_softc(dev);
940 vm_offset_t i;
941
942 if (mem->am_type == 2 && mem->am_size != AGP_PAGE_SIZE) {
943 mtx_lock(&sc->agp.as_lock);
944 if (!mem->am_is_bound) {
945 mtx_unlock(&sc->agp.as_lock);
946 return EINVAL;
947 }
948
949 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
950 agp_i810_write_gtt_entry(dev, mem->am_offset + i,
951 0, 0);
952 }
953 agp_flush_cache();
954 mem->am_is_bound = 0;
955 mtx_unlock(&sc->agp.as_lock);
956 return 0;
957 }
958
959 if (mem->am_type != 1)
960 return agp_generic_unbind_memory(dev, mem);
961
962 if ( sc->chiptype != CHIP_I810 )
963 return EINVAL;
964
965 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
966 bus_write_4(sc->sc_res[0],
967 AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
968 }
969
970 return 0;
971 }
972
973 static device_method_t agp_i810_methods[] = {
974 /* Device interface */
975 DEVMETHOD(device_identify, agp_i810_identify),
976 DEVMETHOD(device_probe, agp_i810_probe),
977 DEVMETHOD(device_attach, agp_i810_attach),
978 DEVMETHOD(device_detach, agp_i810_detach),
979
980 /* AGP interface */
981 DEVMETHOD(agp_get_aperture, agp_generic_get_aperture),
982 DEVMETHOD(agp_set_aperture, agp_i810_set_aperture),
983 DEVMETHOD(agp_bind_page, agp_i810_bind_page),
984 DEVMETHOD(agp_unbind_page, agp_i810_unbind_page),
985 DEVMETHOD(agp_flush_tlb, agp_i810_flush_tlb),
986 DEVMETHOD(agp_enable, agp_i810_enable),
987 DEVMETHOD(agp_alloc_memory, agp_i810_alloc_memory),
988 DEVMETHOD(agp_free_memory, agp_i810_free_memory),
989 DEVMETHOD(agp_bind_memory, agp_i810_bind_memory),
990 DEVMETHOD(agp_unbind_memory, agp_i810_unbind_memory),
991
992 { 0, 0 }
993 };
994
995 static driver_t agp_i810_driver = {
996 "agp",
997 agp_i810_methods,
998 sizeof(struct agp_i810_softc),
999 };
1000
1001 static devclass_t agp_devclass;
1002
1003 DRIVER_MODULE(agp_i810, vgapci, agp_i810_driver, agp_devclass, 0, 0);
1004 MODULE_DEPEND(agp_i810, agp, 1, 1, 1);
1005 MODULE_DEPEND(agp_i810, pci, 1, 1, 1);
Cache object: 82be4798754b5e3350f59d7d9abf5410
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