summaryrefslogtreecommitdiffstats
path: root/sys/pci/agp_i810.c
blob: 942dc921adac8e07cd26d19636758b0992b83916 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
/*-
 * Copyright (c) 2000 Doug Rabson
 * Copyright (c) 2000 Ruslan Ermilov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	$FreeBSD$
 */

#include "opt_bus.h"
#include "opt_pci.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/lockmgr.h>
#include <sys/mutex.h>
#include <sys/proc.h>

#include <pci/pcivar.h>
#include <pci/pcireg.h>
#include <pci/agppriv.h>
#include <pci/agpreg.h>

#include <vm/vm.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pageout.h>
#include <vm/pmap.h>

#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>

MALLOC_DECLARE(M_AGP);

#define READ1(off)	bus_space_read_1(sc->bst, sc->bsh, off)
#define WRITE4(off,v)	bus_space_write_4(sc->bst, sc->bsh, off, v)

struct agp_i810_softc {
	struct agp_softc agp;
	u_int32_t initial_aperture;	/* aperture size at startup */
	struct agp_gatt *gatt;
	u_int32_t dcache_size;
	device_t bdev;			/* bridge device */
	struct resource *regs;		/* memory mapped GC registers */
	bus_space_tag_t bst;		/* bus_space tag */
	bus_space_handle_t bsh;		/* bus_space handle */
};

static const char*
agp_i810_match(device_t dev)
{
	if (pci_get_class(dev) != PCIC_DISPLAY
	    || pci_get_subclass(dev) != PCIS_DISPLAY_VGA)
		return NULL;

	switch (pci_get_devid(dev)) {
	case 0x71218086:
		return ("Intel 82810 (i810 GMCH) SVGA controller");

	case 0x71238086:
		return ("Intel 82810-DC100 (i810-DC100 GMCH) SVGA controller");

	case 0x71258086:
		return ("Intel 82810E (i810E GMCH) SVGA controller");

	case 0x11328086:
		return ("Intel 82815 (i815 GMCH) SVGA controller");
	};

	return NULL;
}

/*
 * Find bridge device.
 */
static device_t
agp_i810_find_bridge(device_t dev)
{
	device_t *children, child;
	int nchildren, i;
	u_int32_t devid;

	/*
	 * Calculate bridge device's ID.
	 */
	devid = pci_get_devid(dev);
	switch (devid) {
	case 0x71218086:
	case 0x71238086:
	case 0x71258086:
		devid -= 0x10000;
		break;

	case 0x11328086:
		devid = 0x11308086;
		break;
	};
	if (device_get_children(device_get_parent(dev), &children, &nchildren))
		return 0;

	for (i = 0; i < nchildren; i++) {
		child = children[i];

		if (pci_get_devid(child) == devid) {
			free(children, M_TEMP);
			return child;
		}
	}
	free(children, M_TEMP);
	return 0;
}

static int
agp_i810_probe(device_t dev)
{
	const char *desc;

	desc = agp_i810_match(dev);
	if (desc) {
		device_t bdev;
		u_int8_t smram;

		bdev = agp_i810_find_bridge(dev);
		if (!bdev) {
			if (bootverbose)
				printf("I810: can't find bridge device\n");
			return ENXIO;
		}

		smram = pci_read_config(bdev, AGP_I810_SMRAM, 1);
		if ((smram & AGP_I810_SMRAM_GMS)
		    == AGP_I810_SMRAM_GMS_DISABLED) {
			if (bootverbose)
				printf("I810: disabled, not probing\n");
			return ENXIO;
		}

		device_verbose(dev);
		device_set_desc(dev, desc);
		return 0;
	}

	return ENXIO;
}

static int
agp_i810_attach(device_t dev)
{
	struct agp_i810_softc *sc = device_get_softc(dev);
	struct agp_gatt *gatt;
	int error, rid;

	sc->bdev = agp_i810_find_bridge(dev);
	if (!sc->bdev)
		return ENOENT;

	error = agp_generic_attach(dev);
	if (error)
		return error;

	rid = AGP_I810_MMADR;
	sc->regs = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
				      0, ~0, 1, RF_ACTIVE);
	if (!sc->regs) {
		agp_generic_detach(dev);
		return ENOMEM;
	}
	sc->bst = rman_get_bustag(sc->regs);
	sc->bsh = rman_get_bushandle(sc->regs);

	sc->initial_aperture = AGP_GET_APERTURE(dev);

	if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED)
		sc->dcache_size = 4 * 1024 * 1024;
	else
		sc->dcache_size = 0;

	for (;;) {
		gatt = agp_alloc_gatt(dev);
		if (gatt)
			break;

		/*
		 * Probably contigmalloc failure. Try reducing the
		 * aperture so that the gatt size reduces.
		 */
		if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
			agp_generic_detach(dev);
			return ENOMEM;
		}
	}
	sc->gatt = gatt;

	/* Install the GATT. */
	WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1);

	/*
	 * Make sure the chipset can see everything.
	 */
	agp_flush_cache();

	return 0;
}

static int
agp_i810_detach(device_t dev)
{
	struct agp_i810_softc *sc = device_get_softc(dev);
	int error;

	error = agp_generic_detach(dev);
	if (error)
		return error;

	/* Clear the GATT base. */
	WRITE4(AGP_I810_PGTBL_CTL, 0);

	/* Put the aperture back the way it started. */
	AGP_SET_APERTURE(dev, sc->initial_aperture);

	agp_free_gatt(sc->gatt);

	bus_release_resource(dev, SYS_RES_MEMORY,
			     AGP_I810_MMADR, sc->regs);

	return 0;
}

static u_int32_t
agp_i810_get_aperture(device_t dev)
{
	struct agp_i810_softc *sc = device_get_softc(dev);
	u_int16_t miscc;

	miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
	if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32)
		return 32 * 1024 * 1024;
	else
		return 64 * 1024 * 1024;
}

static int
agp_i810_set_aperture(device_t dev, u_int32_t aperture)
{
	struct agp_i810_softc *sc = device_get_softc(dev);
	u_int16_t miscc;

	/*
	 * Double check for sanity.
	 */
	if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
		device_printf(dev, "bad aperture size %d\n", aperture);
		return EINVAL;
	}

	miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
	miscc &= ~AGP_I810_MISCC_WINSIZE;
	if (aperture == 32 * 1024 * 1024)
		miscc |= AGP_I810_MISCC_WINSIZE_32;
	else
		miscc |= AGP_I810_MISCC_WINSIZE_64;

	pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);

	return 0;
}

static int
agp_i810_bind_page(device_t dev, int offset, vm_offset_t physical)
{
	struct agp_i810_softc *sc = device_get_softc(dev);

	if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
		return EINVAL;

	WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
	return 0;
}

static int
agp_i810_unbind_page(device_t dev, int offset)
{
	struct agp_i810_softc *sc = device_get_softc(dev);

	if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
		return EINVAL;

	WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, 0);
	return 0;
}

/*
 * Writing via memory mapped registers already flushes all TLBs.
 */
static void
agp_i810_flush_tlb(device_t dev)
{
}

static int
agp_i810_enable(device_t dev, u_int32_t mode)
{

	return 0;
}

static struct agp_memory *
agp_i810_alloc_memory(device_t dev, int type, vm_size_t size)
{
	struct agp_i810_softc *sc = device_get_softc(dev);
	struct agp_memory *mem;

	if ((size & (AGP_PAGE_SIZE - 1)) != 0)
		return 0;

	if (sc->agp.as_allocated + size > sc->agp.as_maxmem)
		return 0;

	if (type == 1) {
		/*
		 * Mapping local DRAM into GATT.
		 */
		if (size != sc->dcache_size)
			return 0;
	} else if (type == 2) {
		/*
		 * Bogus mapping of a single page for the hardware cursor.
		 */
		if (size != AGP_PAGE_SIZE)
			return 0;
	}

	mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
	mem->am_id = sc->agp.as_nextid++;
	mem->am_size = size;
	mem->am_type = type;
	if (type != 1)
		mem->am_obj = vm_object_allocate(OBJT_DEFAULT,
						 atop(round_page(size)));
	else
		mem->am_obj = 0;

	if (type == 2) {
		/*
		 * Allocate and wire down the page now so that we can
		 * get its physical address.
		 */
		vm_page_t m;
		m = vm_page_grab(mem->am_obj, 0,
		    VM_ALLOC_WIRED | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
		if ((m->flags & PG_ZERO) == 0)
			pmap_zero_page(m);
		vm_page_lock_queues();
		mem->am_physical = VM_PAGE_TO_PHYS(m);
		vm_page_wakeup(m);
		vm_page_unlock_queues();
	} else {
		mem->am_physical = 0;
	}

	mem->am_offset = 0;
	mem->am_is_bound = 0;
	TAILQ_INSERT_TAIL(&sc->agp.as_memory, mem, am_link);
	sc->agp.as_allocated += size;

	return mem;
}

static int
agp_i810_free_memory(device_t dev, struct agp_memory *mem)
{
	struct agp_i810_softc *sc = device_get_softc(dev);

	if (mem->am_is_bound)
		return EBUSY;

	if (mem->am_type == 2) {
		/*
		 * Unwire the page which we wired in alloc_memory.
		 */
		vm_page_t m = vm_page_lookup(mem->am_obj, 0);
		vm_page_lock_queues();
		vm_page_unwire(m, 0);
		vm_page_unlock_queues();
	}

	sc->agp.as_allocated -= mem->am_size;
	TAILQ_REMOVE(&sc->agp.as_memory, mem, am_link);
	if (mem->am_obj)
		vm_object_deallocate(mem->am_obj);
	free(mem, M_AGP);
	return 0;
}

static int
agp_i810_bind_memory(device_t dev, struct agp_memory *mem,
		     vm_offset_t offset)
{
	struct agp_i810_softc *sc = device_get_softc(dev);
	vm_offset_t i;

	if (mem->am_type != 1)
		return agp_generic_bind_memory(dev, mem, offset);

	for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
		WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4,
		       i | 3);
	}

	return 0;
}

static int
agp_i810_unbind_memory(device_t dev, struct agp_memory *mem)
{
	struct agp_i810_softc *sc = device_get_softc(dev);
	vm_offset_t i;

	if (mem->am_type != 1)
		return agp_generic_unbind_memory(dev, mem);

	for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
		WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);

	return 0;
}

static device_method_t agp_i810_methods[] = {
	/* Device interface */
	DEVMETHOD(device_probe,		agp_i810_probe),
	DEVMETHOD(device_attach,	agp_i810_attach),
	DEVMETHOD(device_detach,	agp_i810_detach),
	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
	DEVMETHOD(device_suspend,	bus_generic_suspend),
	DEVMETHOD(device_resume,	bus_generic_resume),

	/* AGP interface */
	DEVMETHOD(agp_get_aperture,	agp_i810_get_aperture),
	DEVMETHOD(agp_set_aperture,	agp_i810_set_aperture),
	DEVMETHOD(agp_bind_page,	agp_i810_bind_page),
	DEVMETHOD(agp_unbind_page,	agp_i810_unbind_page),
	DEVMETHOD(agp_flush_tlb,	agp_i810_flush_tlb),
	DEVMETHOD(agp_enable,		agp_i810_enable),
	DEVMETHOD(agp_alloc_memory,	agp_i810_alloc_memory),
	DEVMETHOD(agp_free_memory,	agp_i810_free_memory),
	DEVMETHOD(agp_bind_memory,	agp_i810_bind_memory),
	DEVMETHOD(agp_unbind_memory,	agp_i810_unbind_memory),

	{ 0, 0 }
};

static driver_t agp_i810_driver = {
	"agp",
	agp_i810_methods,
	sizeof(struct agp_i810_softc),
};

static devclass_t agp_devclass;

DRIVER_MODULE(agp_i810, pci, agp_i810_driver, agp_devclass, 0, 0);
OpenPOWER on IntegriCloud