i915_dma.c 21.7 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1
2
/* i915_dma.c -- DMA support for the I915 -*- linux-c -*-
 */
Dave Airlie's avatar
Dave Airlie committed
3
/*
Linus Torvalds's avatar
Linus Torvalds committed
4
5
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
Dave Airlie's avatar
Dave Airlie committed
27
 */
Linus Torvalds's avatar
Linus Torvalds committed
28
29
30
31
32
33
34
35
36
37
38

#include "drmP.h"
#include "drm.h"
#include "i915_drm.h"
#include "i915_drv.h"

/* Really want an OS-independent resettable timer.  Would like to have
 * this loop run for (eg) 3 sec, but have the timer reset every time
 * the head pointer changes, so that EBUSY only happens if the ring
 * actually stalls for (eg) 3 seconds.
 */
39
int i915_wait_ring(struct drm_device * dev, int n, const char *caller)
Linus Torvalds's avatar
Linus Torvalds committed
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
{
	drm_i915_private_t *dev_priv = dev->dev_private;
	drm_i915_ring_buffer_t *ring = &(dev_priv->ring);
	u32 last_head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
	int i;

	for (i = 0; i < 10000; i++) {
		ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
		ring->space = ring->head - (ring->tail + 8);
		if (ring->space < 0)
			ring->space += ring->Size;
		if (ring->space >= n)
			return 0;

		dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;

		if (ring->head != last_head)
			i = 0;

		last_head = ring->head;
	}

Eric Anholt's avatar
Eric Anholt committed
62
	return -EBUSY;
Linus Torvalds's avatar
Linus Torvalds committed
63
64
}

65
void i915_kernel_lost_context(struct drm_device * dev)
Linus Torvalds's avatar
Linus Torvalds committed
66
67
68
69
70
71
72
73
74
75
76
77
78
79
{
	drm_i915_private_t *dev_priv = dev->dev_private;
	drm_i915_ring_buffer_t *ring = &(dev_priv->ring);

	ring->head = I915_READ(LP_RING + RING_HEAD) & HEAD_ADDR;
	ring->tail = I915_READ(LP_RING + RING_TAIL) & TAIL_ADDR;
	ring->space = ring->head - (ring->tail + 8);
	if (ring->space < 0)
		ring->space += ring->Size;

	if (ring->head == ring->tail)
		dev_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY;
}

80
static int i915_dma_cleanup(struct drm_device * dev)
Linus Torvalds's avatar
Linus Torvalds committed
81
{
82
	drm_i915_private_t *dev_priv = dev->dev_private;
Linus Torvalds's avatar
Linus Torvalds committed
83
84
85
86
87
	/* Make sure interrupts are disabled here because the uninstall ioctl
	 * may not have been called from userspace and after dev_private
	 * is freed, it's too late.
	 */
	if (dev->irq)
Dave Airlie's avatar
Dave Airlie committed
88
		drm_irq_uninstall(dev);
Linus Torvalds's avatar
Linus Torvalds committed
89

90
91
92
93
94
95
	if (dev_priv->ring.virtual_start) {
		drm_core_ioremapfree(&dev_priv->ring.map, dev);
		dev_priv->ring.virtual_start = 0;
		dev_priv->ring.map.handle = 0;
		dev_priv->ring.map.size = 0;
	}
96

97
98
99
100
101
102
	if (dev_priv->status_page_dmah) {
		drm_pci_free(dev, dev_priv->status_page_dmah);
		dev_priv->status_page_dmah = NULL;
		/* Need to rewrite hardware status page */
		I915_WRITE(0x02080, 0x1ffff000);
	}
Linus Torvalds's avatar
Linus Torvalds committed
103

104
105
106
107
	if (dev_priv->status_gfx_addr) {
		dev_priv->status_gfx_addr = 0;
		drm_core_ioremapfree(&dev_priv->hws_map, dev);
		I915_WRITE(0x2080, 0x1ffff000);
Linus Torvalds's avatar
Linus Torvalds committed
108
109
110
111
112
	}

	return 0;
}

113
static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init)
Linus Torvalds's avatar
Linus Torvalds committed
114
{
115
	drm_i915_private_t *dev_priv = dev->dev_private;
Linus Torvalds's avatar
Linus Torvalds committed
116

117
	dev_priv->sarea = drm_getsarea(dev);
Linus Torvalds's avatar
Linus Torvalds committed
118
119
120
	if (!dev_priv->sarea) {
		DRM_ERROR("can not find sarea!\n");
		i915_dma_cleanup(dev);
Eric Anholt's avatar
Eric Anholt committed
121
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
122
123
124
125
126
127
	}

	dev_priv->mmio_map = drm_core_findmap(dev, init->mmio_offset);
	if (!dev_priv->mmio_map) {
		i915_dma_cleanup(dev);
		DRM_ERROR("can not find mmio map!\n");
Eric Anholt's avatar
Eric Anholt committed
128
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
	}

	dev_priv->sarea_priv = (drm_i915_sarea_t *)
	    ((u8 *) dev_priv->sarea->handle + init->sarea_priv_offset);

	dev_priv->ring.Start = init->ring_start;
	dev_priv->ring.End = init->ring_end;
	dev_priv->ring.Size = init->ring_size;
	dev_priv->ring.tail_mask = dev_priv->ring.Size - 1;

	dev_priv->ring.map.offset = init->ring_start;
	dev_priv->ring.map.size = init->ring_size;
	dev_priv->ring.map.type = 0;
	dev_priv->ring.map.flags = 0;
	dev_priv->ring.map.mtrr = 0;

Dave Airlie's avatar
Dave Airlie committed
145
	drm_core_ioremap(&dev_priv->ring.map, dev);
Linus Torvalds's avatar
Linus Torvalds committed
146
147
148
149
150

	if (dev_priv->ring.map.handle == NULL) {
		i915_dma_cleanup(dev);
		DRM_ERROR("can not ioremap virtual address for"
			  " ring buffer\n");
Eric Anholt's avatar
Eric Anholt committed
151
		return -ENOMEM;
Linus Torvalds's avatar
Linus Torvalds committed
152
153
154
155
	}

	dev_priv->ring.virtual_start = dev_priv->ring.map.handle;

156
	dev_priv->cpp = init->cpp;
Linus Torvalds's avatar
Linus Torvalds committed
157
158
159
160
161
162
163
164
165
	dev_priv->back_offset = init->back_offset;
	dev_priv->front_offset = init->front_offset;
	dev_priv->current_page = 0;
	dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;

	/* We are using separate values as placeholders for mechanisms for
	 * private backbuffer/depthbuffer usage.
	 */
	dev_priv->use_mi_batchbuffer_start = 0;
166
167
	if (IS_I965G(dev)) /* 965 doesn't support older method */
		dev_priv->use_mi_batchbuffer_start = 1;
Linus Torvalds's avatar
Linus Torvalds committed
168
169
170
171
172
173

	/* Allow hardware batchbuffers unless told otherwise.
	 */
	dev_priv->allow_batchbuffer = 1;

	/* Program Hardware Status Page */
174
	if (!I915_NEED_GFX_HWS(dev)) {
175
176
177
178
179
180
		dev_priv->status_page_dmah =
			drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff);

		if (!dev_priv->status_page_dmah) {
			i915_dma_cleanup(dev);
			DRM_ERROR("Can not allocate hardware status page\n");
Eric Anholt's avatar
Eric Anholt committed
181
			return -ENOMEM;
182
183
184
		}
		dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr;
		dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr;
Linus Torvalds's avatar
Linus Torvalds committed
185

186
187
		memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
		I915_WRITE(0x02080, dev_priv->dma_status_page);
Linus Torvalds's avatar
Linus Torvalds committed
188
189
190
191
192
	}
	DRM_DEBUG("Enabled hardware status page\n");
	return 0;
}

193
static int i915_dma_resume(struct drm_device * dev)
Linus Torvalds's avatar
Linus Torvalds committed
194
195
196
{
	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;

197
	DRM_DEBUG("%s\n", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
198
199
200

	if (!dev_priv->sarea) {
		DRM_ERROR("can not find sarea!\n");
Eric Anholt's avatar
Eric Anholt committed
201
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
202
203
204
205
	}

	if (!dev_priv->mmio_map) {
		DRM_ERROR("can not find mmio map!\n");
Eric Anholt's avatar
Eric Anholt committed
206
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
207
208
209
210
211
	}

	if (dev_priv->ring.map.handle == NULL) {
		DRM_ERROR("can not ioremap virtual address for"
			  " ring buffer\n");
Eric Anholt's avatar
Eric Anholt committed
212
		return -ENOMEM;
Linus Torvalds's avatar
Linus Torvalds committed
213
214
215
216
217
	}

	/* Program Hardware Status Page */
	if (!dev_priv->hw_status_page) {
		DRM_ERROR("Can not find hardware status page\n");
Eric Anholt's avatar
Eric Anholt committed
218
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
219
220
221
	}
	DRM_DEBUG("hw status page @ %p\n", dev_priv->hw_status_page);

222
223
224
225
	if (dev_priv->status_gfx_addr != 0)
		I915_WRITE(0x02080, dev_priv->status_gfx_addr);
	else
		I915_WRITE(0x02080, dev_priv->dma_status_page);
Linus Torvalds's avatar
Linus Torvalds committed
226
227
228
229
230
	DRM_DEBUG("Enabled hardware status page\n");

	return 0;
}

231
232
static int i915_dma_init(struct drm_device *dev, void *data,
			 struct drm_file *file_priv)
Linus Torvalds's avatar
Linus Torvalds committed
233
{
234
	drm_i915_init_t *init = data;
Linus Torvalds's avatar
Linus Torvalds committed
235
236
	int retcode = 0;

237
	switch (init->func) {
Linus Torvalds's avatar
Linus Torvalds committed
238
	case I915_INIT_DMA:
239
		retcode = i915_initialize(dev, init);
Linus Torvalds's avatar
Linus Torvalds committed
240
241
242
243
244
		break;
	case I915_CLEANUP_DMA:
		retcode = i915_dma_cleanup(dev);
		break;
	case I915_RESUME_DMA:
Dave Airlie's avatar
Dave Airlie committed
245
		retcode = i915_dma_resume(dev);
Linus Torvalds's avatar
Linus Torvalds committed
246
247
		break;
	default:
Eric Anholt's avatar
Eric Anholt committed
248
		retcode = -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
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
		break;
	}

	return retcode;
}

/* Implement basically the same security restrictions as hardware does
 * for MI_BATCH_NON_SECURE.  These can be made stricter at any time.
 *
 * Most of the calculations below involve calculating the size of a
 * particular instruction.  It's important to get the size right as
 * that tells us where the next instruction to check is.  Any illegal
 * instruction detected will be given a size of zero, which is a
 * signal to abort the rest of the buffer.
 */
static int do_validate_cmd(int cmd)
{
	switch (((cmd >> 29) & 0x7)) {
	case 0x0:
		switch ((cmd >> 23) & 0x3f) {
		case 0x0:
			return 1;	/* MI_NOOP */
		case 0x4:
			return 1;	/* MI_FLUSH */
		default:
			return 0;	/* disallow everything else */
		}
		break;
	case 0x1:
		return 0;	/* reserved */
	case 0x2:
		return (cmd & 0xff) + 2;	/* 2d commands */
	case 0x3:
		if (((cmd >> 24) & 0x1f) <= 0x18)
			return 1;

		switch ((cmd >> 24) & 0x1f) {
		case 0x1c:
			return 1;
		case 0x1d:
Dave Airlie's avatar
Dave Airlie committed
289
			switch ((cmd >> 16) & 0xff) {
Linus Torvalds's avatar
Linus Torvalds committed
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
			case 0x3:
				return (cmd & 0x1f) + 2;
			case 0x4:
				return (cmd & 0xf) + 2;
			default:
				return (cmd & 0xffff) + 2;
			}
		case 0x1e:
			if (cmd & (1 << 23))
				return (cmd & 0xffff) + 1;
			else
				return 1;
		case 0x1f:
			if ((cmd & (1 << 23)) == 0)	/* inline vertices */
				return (cmd & 0x1ffff) + 2;
			else if (cmd & (1 << 17))	/* indirect random */
				if ((cmd & 0xffff) == 0)
					return 0;	/* unknown length, too hard */
				else
					return (((cmd & 0xffff) + 1) / 2) + 1;
			else
				return 2;	/* indirect sequential */
		default:
			return 0;
		}
	default:
		return 0;
	}

	return 0;
}

static int validate_cmd(int cmd)
{
	int ret = do_validate_cmd(cmd);

326
/*	printk("validate_cmd( %x ): %d\n", cmd, ret); */
Linus Torvalds's avatar
Linus Torvalds committed
327
328
329
330

	return ret;
}

331
static int i915_emit_cmds(struct drm_device * dev, int __user * buffer, int dwords)
Linus Torvalds's avatar
Linus Torvalds committed
332
333
334
335
336
{
	drm_i915_private_t *dev_priv = dev->dev_private;
	int i;
	RING_LOCALS;

337
	if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8)
Eric Anholt's avatar
Eric Anholt committed
338
		return -EINVAL;
339

340
	BEGIN_LP_RING((dwords+1)&~1);
341

Linus Torvalds's avatar
Linus Torvalds committed
342
343
344
345
	for (i = 0; i < dwords;) {
		int cmd, sz;

		if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i], sizeof(cmd)))
Eric Anholt's avatar
Eric Anholt committed
346
			return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
347
348

		if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords)
Eric Anholt's avatar
Eric Anholt committed
349
			return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
350
351
352
353
354
355

		OUT_RING(cmd);

		while (++i, --sz) {
			if (DRM_COPY_FROM_USER_UNCHECKED(&cmd, &buffer[i],
							 sizeof(cmd))) {
Eric Anholt's avatar
Eric Anholt committed
356
				return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
357
358
359
360
361
			}
			OUT_RING(cmd);
		}
	}

362
363
364
365
366
	if (dwords & 1)
		OUT_RING(0);

	ADVANCE_LP_RING();

Linus Torvalds's avatar
Linus Torvalds committed
367
368
369
	return 0;
}

370
static int i915_emit_box(struct drm_device * dev,
371
			 struct drm_clip_rect __user * boxes,
Linus Torvalds's avatar
Linus Torvalds committed
372
373
374
			 int i, int DR1, int DR4)
{
	drm_i915_private_t *dev_priv = dev->dev_private;
375
	struct drm_clip_rect box;
Linus Torvalds's avatar
Linus Torvalds committed
376
377
378
	RING_LOCALS;

	if (DRM_COPY_FROM_USER_UNCHECKED(&box, &boxes[i], sizeof(box))) {
Eric Anholt's avatar
Eric Anholt committed
379
		return -EFAULT;
Linus Torvalds's avatar
Linus Torvalds committed
380
381
382
383
384
	}

	if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) {
		DRM_ERROR("Bad box %d,%d..%d,%d\n",
			  box.x1, box.y1, box.x2, box.y2);
Eric Anholt's avatar
Eric Anholt committed
385
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
386
387
	}

388
389
390
391
	if (IS_I965G(dev)) {
		BEGIN_LP_RING(4);
		OUT_RING(GFX_OP_DRAWRECT_INFO_I965);
		OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
Andrew Morton's avatar
Andrew Morton committed
392
		OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
393
394
395
396
397
398
399
400
401
402
403
404
		OUT_RING(DR4);
		ADVANCE_LP_RING();
	} else {
		BEGIN_LP_RING(6);
		OUT_RING(GFX_OP_DRAWRECT_INFO);
		OUT_RING(DR1);
		OUT_RING((box.x1 & 0xffff) | (box.y1 << 16));
		OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16));
		OUT_RING(DR4);
		OUT_RING(0);
		ADVANCE_LP_RING();
	}
Linus Torvalds's avatar
Linus Torvalds committed
405
406
407
408

	return 0;
}

409
410
411
412
/* XXX: Emitting the counter should really be moved to part of the IRQ
 * emit. For now, do it in both places:
 */

413
static void i915_emit_breadcrumb(struct drm_device *dev)
414
415
416
417
{
	drm_i915_private_t *dev_priv = dev->dev_private;
	RING_LOCALS;

418
	dev_priv->sarea_priv->last_enqueue = ++dev_priv->counter;
419

420
421
	if (dev_priv->counter > 0x7FFFFFFFUL)
		dev_priv->sarea_priv->last_enqueue = dev_priv->counter = 1;
422
423
424
425
426
427
428
429
430

	BEGIN_LP_RING(4);
	OUT_RING(CMD_STORE_DWORD_IDX);
	OUT_RING(20);
	OUT_RING(dev_priv->counter);
	OUT_RING(0);
	ADVANCE_LP_RING();
}

431
static int i915_dispatch_cmdbuffer(struct drm_device * dev,
Linus Torvalds's avatar
Linus Torvalds committed
432
433
434
435
436
437
438
				   drm_i915_cmdbuffer_t * cmd)
{
	int nbox = cmd->num_cliprects;
	int i = 0, count, ret;

	if (cmd->sz & 0x3) {
		DRM_ERROR("alignment");
Eric Anholt's avatar
Eric Anholt committed
439
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
	}

	i915_kernel_lost_context(dev);

	count = nbox ? nbox : 1;

	for (i = 0; i < count; i++) {
		if (i < nbox) {
			ret = i915_emit_box(dev, cmd->cliprects, i,
					    cmd->DR1, cmd->DR4);
			if (ret)
				return ret;
		}

		ret = i915_emit_cmds(dev, (int __user *)cmd->buf, cmd->sz / 4);
		if (ret)
			return ret;
	}

459
	i915_emit_breadcrumb(dev);
Linus Torvalds's avatar
Linus Torvalds committed
460
461
462
	return 0;
}

463
static int i915_dispatch_batchbuffer(struct drm_device * dev,
Linus Torvalds's avatar
Linus Torvalds committed
464
465
466
				     drm_i915_batchbuffer_t * batch)
{
	drm_i915_private_t *dev_priv = dev->dev_private;
467
	struct drm_clip_rect __user *boxes = batch->cliprects;
Linus Torvalds's avatar
Linus Torvalds committed
468
469
470
471
472
473
	int nbox = batch->num_cliprects;
	int i = 0, count;
	RING_LOCALS;

	if ((batch->start | batch->used) & 0x7) {
		DRM_ERROR("alignment");
Eric Anholt's avatar
Eric Anholt committed
474
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
	}

	i915_kernel_lost_context(dev);

	count = nbox ? nbox : 1;

	for (i = 0; i < count; i++) {
		if (i < nbox) {
			int ret = i915_emit_box(dev, boxes, i,
						batch->DR1, batch->DR4);
			if (ret)
				return ret;
		}

		if (dev_priv->use_mi_batchbuffer_start) {
			BEGIN_LP_RING(2);
491
492
493
494
495
496
497
			if (IS_I965G(dev)) {
				OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965);
				OUT_RING(batch->start);
			} else {
				OUT_RING(MI_BATCH_BUFFER_START | (2 << 6));
				OUT_RING(batch->start | MI_BATCH_NON_SECURE);
			}
Linus Torvalds's avatar
Linus Torvalds committed
498
499
500
501
502
503
504
505
506
507
508
			ADVANCE_LP_RING();
		} else {
			BEGIN_LP_RING(4);
			OUT_RING(MI_BATCH_BUFFER);
			OUT_RING(batch->start | MI_BATCH_NON_SECURE);
			OUT_RING(batch->start + batch->used - 4);
			OUT_RING(0);
			ADVANCE_LP_RING();
		}
	}

509
	i915_emit_breadcrumb(dev);
Linus Torvalds's avatar
Linus Torvalds committed
510
511
512
513

	return 0;
}

514
static int i915_dispatch_flip(struct drm_device * dev)
Linus Torvalds's avatar
Linus Torvalds committed
515
516
517
518
{
	drm_i915_private_t *dev_priv = dev->dev_private;
	RING_LOCALS;

519
	DRM_DEBUG("%s: page=%d pfCurrentPage=%d\n",
520
		  __func__,
521
522
		  dev_priv->current_page,
		  dev_priv->sarea_priv->pf_current_page);
Linus Torvalds's avatar
Linus Torvalds committed
523

524
525
526
527
528
529
	i915_kernel_lost_context(dev);

	BEGIN_LP_RING(2);
	OUT_RING(INST_PARSER_CLIENT | INST_OP_FLUSH | INST_FLUSH_MAP_CACHE);
	OUT_RING(0);
	ADVANCE_LP_RING();
Linus Torvalds's avatar
Linus Torvalds committed
530

531
532
533
534
535
536
	BEGIN_LP_RING(6);
	OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP);
	OUT_RING(0);
	if (dev_priv->current_page == 0) {
		OUT_RING(dev_priv->back_offset);
		dev_priv->current_page = 1;
Linus Torvalds's avatar
Linus Torvalds committed
537
	} else {
538
539
		OUT_RING(dev_priv->front_offset);
		dev_priv->current_page = 0;
Linus Torvalds's avatar
Linus Torvalds committed
540
	}
541
542
	OUT_RING(0);
	ADVANCE_LP_RING();
Linus Torvalds's avatar
Linus Torvalds committed
543

544
545
546
547
	BEGIN_LP_RING(2);
	OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP);
	OUT_RING(0);
	ADVANCE_LP_RING();
Linus Torvalds's avatar
Linus Torvalds committed
548

549
	dev_priv->sarea_priv->last_enqueue = dev_priv->counter++;
Linus Torvalds's avatar
Linus Torvalds committed
550
551

	BEGIN_LP_RING(4);
552
553
554
555
	OUT_RING(CMD_STORE_DWORD_IDX);
	OUT_RING(20);
	OUT_RING(dev_priv->counter);
	OUT_RING(0);
Linus Torvalds's avatar
Linus Torvalds committed
556
557
	ADVANCE_LP_RING();

558
559
	dev_priv->sarea_priv->pf_current_page = dev_priv->current_page;
	return 0;
Linus Torvalds's avatar
Linus Torvalds committed
560
561
}

562
static int i915_quiescent(struct drm_device * dev)
Linus Torvalds's avatar
Linus Torvalds committed
563
564
565
566
{
	drm_i915_private_t *dev_priv = dev->dev_private;

	i915_kernel_lost_context(dev);
567
	return i915_wait_ring(dev, dev_priv->ring.Size - 8, __func__);
Linus Torvalds's avatar
Linus Torvalds committed
568
569
}

570
571
static int i915_flush_ioctl(struct drm_device *dev, void *data,
			    struct drm_file *file_priv)
Linus Torvalds's avatar
Linus Torvalds committed
572
{
573
	LOCK_TEST_WITH_RETURN(dev, file_priv);
Linus Torvalds's avatar
Linus Torvalds committed
574
575
576
577

	return i915_quiescent(dev);
}

578
579
static int i915_batchbuffer(struct drm_device *dev, void *data,
			    struct drm_file *file_priv)
Linus Torvalds's avatar
Linus Torvalds committed
580
581
{
	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
582
	u32 *hw_status = dev_priv->hw_status_page;
Linus Torvalds's avatar
Linus Torvalds committed
583
584
	drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
	    dev_priv->sarea_priv;
585
	drm_i915_batchbuffer_t *batch = data;
Linus Torvalds's avatar
Linus Torvalds committed
586
587
588
589
	int ret;

	if (!dev_priv->allow_batchbuffer) {
		DRM_ERROR("Batchbuffer ioctl disabled\n");
Eric Anholt's avatar
Eric Anholt committed
590
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
591
592
593
	}

	DRM_DEBUG("i915 batchbuffer, start %x used %d cliprects %d\n",
594
		  batch->start, batch->used, batch->num_cliprects);
Linus Torvalds's avatar
Linus Torvalds committed
595

596
	LOCK_TEST_WITH_RETURN(dev, file_priv);
Linus Torvalds's avatar
Linus Torvalds committed
597

598
599
	if (batch->num_cliprects && DRM_VERIFYAREA_READ(batch->cliprects,
						       batch->num_cliprects *
600
						       sizeof(struct drm_clip_rect)))
Eric Anholt's avatar
Eric Anholt committed
601
		return -EFAULT;
Linus Torvalds's avatar
Linus Torvalds committed
602

603
	ret = i915_dispatch_batchbuffer(dev, batch);
Linus Torvalds's avatar
Linus Torvalds committed
604

605
	sarea_priv->last_dispatch = (int)hw_status[5];
Linus Torvalds's avatar
Linus Torvalds committed
606
607
608
	return ret;
}

609
610
static int i915_cmdbuffer(struct drm_device *dev, void *data,
			  struct drm_file *file_priv)
Linus Torvalds's avatar
Linus Torvalds committed
611
612
{
	drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
613
	u32 *hw_status = dev_priv->hw_status_page;
Linus Torvalds's avatar
Linus Torvalds committed
614
615
	drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *)
	    dev_priv->sarea_priv;
616
	drm_i915_cmdbuffer_t *cmdbuf = data;
Linus Torvalds's avatar
Linus Torvalds committed
617
618
619
	int ret;

	DRM_DEBUG("i915 cmdbuffer, buf %p sz %d cliprects %d\n",
620
		  cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects);
Linus Torvalds's avatar
Linus Torvalds committed
621

622
	LOCK_TEST_WITH_RETURN(dev, file_priv);
Linus Torvalds's avatar
Linus Torvalds committed
623

624
625
626
	if (cmdbuf->num_cliprects &&
	    DRM_VERIFYAREA_READ(cmdbuf->cliprects,
				cmdbuf->num_cliprects *
627
				sizeof(struct drm_clip_rect))) {
Linus Torvalds's avatar
Linus Torvalds committed
628
		DRM_ERROR("Fault accessing cliprects\n");
Eric Anholt's avatar
Eric Anholt committed
629
		return -EFAULT;
Linus Torvalds's avatar
Linus Torvalds committed
630
631
	}

632
	ret = i915_dispatch_cmdbuffer(dev, cmdbuf);
Linus Torvalds's avatar
Linus Torvalds committed
633
634
635
636
637
	if (ret) {
		DRM_ERROR("i915_dispatch_cmdbuffer failed\n");
		return ret;
	}

638
	sarea_priv->last_dispatch = (int)hw_status[5];
Linus Torvalds's avatar
Linus Torvalds committed
639
640
641
	return 0;
}

642
643
static int i915_flip_bufs(struct drm_device *dev, void *data,
			  struct drm_file *file_priv)
Linus Torvalds's avatar
Linus Torvalds committed
644
{
645
	DRM_DEBUG("%s\n", __func__);
Linus Torvalds's avatar
Linus Torvalds committed
646

647
	LOCK_TEST_WITH_RETURN(dev, file_priv);
Linus Torvalds's avatar
Linus Torvalds committed
648

649
	return i915_dispatch_flip(dev);
Linus Torvalds's avatar
Linus Torvalds committed
650
651
}

652
653
static int i915_getparam(struct drm_device *dev, void *data,
			 struct drm_file *file_priv)
Linus Torvalds's avatar
Linus Torvalds committed
654
655
{
	drm_i915_private_t *dev_priv = dev->dev_private;
656
	drm_i915_getparam_t *param = data;
Linus Torvalds's avatar
Linus Torvalds committed
657
658
659
	int value;

	if (!dev_priv) {
660
		DRM_ERROR("called with no initialization\n");
Eric Anholt's avatar
Eric Anholt committed
661
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
662
663
	}

664
	switch (param->param) {
Linus Torvalds's avatar
Linus Torvalds committed
665
666
667
668
669
670
	case I915_PARAM_IRQ_ACTIVE:
		value = dev->irq ? 1 : 0;
		break;
	case I915_PARAM_ALLOW_BATCHBUFFER:
		value = dev_priv->allow_batchbuffer ? 1 : 0;
		break;
Dave Airlie's avatar
Dave Airlie committed
671
672
673
	case I915_PARAM_LAST_DISPATCH:
		value = READ_BREADCRUMB(dev_priv);
		break;
Linus Torvalds's avatar
Linus Torvalds committed
674
	default:
675
		DRM_ERROR("Unknown parameter %d\n", param->param);
Eric Anholt's avatar
Eric Anholt committed
676
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
677
678
	}

679
	if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) {
Linus Torvalds's avatar
Linus Torvalds committed
680
		DRM_ERROR("DRM_COPY_TO_USER failed\n");
Eric Anholt's avatar
Eric Anholt committed
681
		return -EFAULT;
Linus Torvalds's avatar
Linus Torvalds committed
682
683
684
685
686
	}

	return 0;
}

687
688
static int i915_setparam(struct drm_device *dev, void *data,
			 struct drm_file *file_priv)
Linus Torvalds's avatar
Linus Torvalds committed
689
690
{
	drm_i915_private_t *dev_priv = dev->dev_private;
691
	drm_i915_setparam_t *param = data;
Linus Torvalds's avatar
Linus Torvalds committed
692
693

	if (!dev_priv) {
694
		DRM_ERROR("called with no initialization\n");
Eric Anholt's avatar
Eric Anholt committed
695
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
696
697
	}

698
	switch (param->param) {
Linus Torvalds's avatar
Linus Torvalds committed
699
	case I915_SETPARAM_USE_MI_BATCHBUFFER_START:
700
		if (!IS_I965G(dev))
701
			dev_priv->use_mi_batchbuffer_start = param->value;
Linus Torvalds's avatar
Linus Torvalds committed
702
703
		break;
	case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY:
704
		dev_priv->tex_lru_log_granularity = param->value;
Linus Torvalds's avatar
Linus Torvalds committed
705
706
		break;
	case I915_SETPARAM_ALLOW_BATCHBUFFER:
707
		dev_priv->allow_batchbuffer = param->value;
Linus Torvalds's avatar
Linus Torvalds committed
708
709
		break;
	default:
710
		DRM_ERROR("unknown parameter %d\n", param->param);
Eric Anholt's avatar
Eric Anholt committed
711
		return -EINVAL;
Linus Torvalds's avatar
Linus Torvalds committed
712
713
714
715
716
	}

	return 0;
}

717
718
static int i915_set_status_page(struct drm_device *dev, void *data,
				struct drm_file *file_priv)
719
720
{
	drm_i915_private_t *dev_priv = dev->dev_private;
721
	drm_i915_hws_addr_t *hws = data;
722
723
724

	if (!I915_NEED_GFX_HWS(dev))
		return -EINVAL;
725
726

	if (!dev_priv) {
727
		DRM_ERROR("called with no initialization\n");
Eric Anholt's avatar
Eric Anholt committed
728
		return -EINVAL;
729
730
	}

731
732
733
	printk(KERN_DEBUG "set status page addr 0x%08x\n", (u32)hws->addr);

	dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12);
734

735
	dev_priv->hws_map.offset = dev->agp->base + hws->addr;
736
737
738
739
740
741
742
743
744
745
746
	dev_priv->hws_map.size = 4*1024;
	dev_priv->hws_map.type = 0;
	dev_priv->hws_map.flags = 0;
	dev_priv->hws_map.mtrr = 0;

	drm_core_ioremap(&dev_priv->hws_map, dev);
	if (dev_priv->hws_map.handle == NULL) {
		i915_dma_cleanup(dev);
		dev_priv->status_gfx_addr = 0;
		DRM_ERROR("can not ioremap virtual address for"
				" G33 hw status page\n");
Eric Anholt's avatar
Eric Anholt committed
747
		return -ENOMEM;
748
749
750
751
752
753
754
755
756
757
758
	}
	dev_priv->hw_status_page = dev_priv->hws_map.handle;

	memset(dev_priv->hw_status_page, 0, PAGE_SIZE);
	I915_WRITE(0x02080, dev_priv->status_gfx_addr);
	DRM_DEBUG("load hws 0x2080 with gfx mem 0x%x\n",
			dev_priv->status_gfx_addr);
	DRM_DEBUG("load hws at %p\n", dev_priv->hw_status_page);
	return 0;
}

759
int i915_driver_load(struct drm_device *dev, unsigned long flags)
760
{
761
762
763
764
	struct drm_i915_private *dev_priv = dev->dev_private;
	unsigned long base, size;
	int ret = 0, mmio_bar = IS_I9XX(dev) ? 0 : 1;

765
766
767
768
769
770
771
	/* i915 has 4 more counters */
	dev->counters += 4;
	dev->types[6] = _DRM_STAT_IRQ;
	dev->types[7] = _DRM_STAT_PRIMARY;
	dev->types[8] = _DRM_STAT_SECONDARY;
	dev->types[9] = _DRM_STAT_DMA;

772
773
774
775
776
777
778
779
780
781
782
783
	dev_priv = drm_alloc(sizeof(drm_i915_private_t), DRM_MEM_DRIVER);
	if (dev_priv == NULL)
		return -ENOMEM;

	memset(dev_priv, 0, sizeof(drm_i915_private_t));

	dev->dev_private = (void *)dev_priv;

	/* Add register map (needed for suspend/resume) */
	base = drm_get_resource_start(dev, mmio_bar);
	size = drm_get_resource_len(dev, mmio_bar);

784
785
	ret = drm_addmap(dev, base, size, _DRM_REGISTERS,
			 _DRM_KERNEL | _DRM_DRIVER,
786
787
788
789
790
791
792
793
794
795
796
797
798
799
			 &dev_priv->mmio_map);
	return ret;
}

int i915_driver_unload(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	if (dev_priv->mmio_map)
		drm_rmmap(dev, dev_priv->mmio_map);

	drm_free(dev->dev_private, sizeof(drm_i915_private_t),
		 DRM_MEM_DRIVER);

800
801
802
	return 0;
}

803
void i915_driver_lastclose(struct drm_device * dev)
Linus Torvalds's avatar
Linus Torvalds committed
804
{
805
806
	drm_i915_private_t *dev_priv = dev->dev_private;

Dave Airlie's avatar
Dave Airlie committed
807
808
809
	if (!dev_priv)
		return;

810
	if (dev_priv->agp_heap)
Dave Airlie's avatar
Dave Airlie committed
811
		i915_mem_takedown(&(dev_priv->agp_heap));
812

Dave Airlie's avatar
Dave Airlie committed
813
	i915_dma_cleanup(dev);
Linus Torvalds's avatar
Linus Torvalds committed
814
815
}

816
void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv)
Linus Torvalds's avatar
Linus Torvalds committed
817
{
818
819
	drm_i915_private_t *dev_priv = dev->dev_private;
	i915_mem_release(dev, file_priv, dev_priv->agp_heap);
Linus Torvalds's avatar
Linus Torvalds committed
820
821
}

822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
struct drm_ioctl_desc i915_ioctls[] = {
	DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP,  i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
	DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE,  i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ),
	DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE,  i915_vblank_pipe_get, DRM_AUTH ),
	DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH),
	DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH),
Dave Airlie's avatar
Dave Airlie committed
840
841
842
};

int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls);
843
844
845
846
847
848
849
850
851
852
853
854

/**
 * Determine if the device really is AGP or not.
 *
 * All Intel graphics chipsets are treated as AGP, even if they are really
 * PCI-e.
 *
 * \param dev   The device to be tested.
 *
 * \returns
 * A value of 1 is always retured to indictate every i9x5 is AGP.
 */
855
int i915_driver_device_is_agp(struct drm_device * dev)
856
857
858
{
	return 1;
}