summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/virtio/virtgpu_display.c
blob: f545913a56c7a972fe71dea32a20972f5440f5fb (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
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
/*
 * Copyright (C) 2015 Red Hat, Inc.
 * All Rights Reserved.
 *
 * Authors:
 *    Dave Airlie
 *    Alon Levy
 *
 * 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, sublicense,
 * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 */

#include "virtgpu_drv.h"
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic_helper.h>

#define XRES_MIN   320
#define YRES_MIN   200

#define XRES_DEF  1024
#define YRES_DEF   768

#define XRES_MAX  8192
#define YRES_MAX  8192

static void virtio_gpu_crtc_gamma_set(struct drm_crtc *crtc,
				      u16 *red, u16 *green, u16 *blue,
				      uint32_t start, uint32_t size)
{
	/* TODO */
}

static void
virtio_gpu_hide_cursor(struct virtio_gpu_device *vgdev,
		       struct virtio_gpu_output *output)
{
	output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
	output->cursor.resource_id = 0;
	virtio_gpu_cursor_ping(vgdev, output);
}

static int virtio_gpu_crtc_cursor_set(struct drm_crtc *crtc,
				      struct drm_file *file_priv,
				      uint32_t handle,
				      uint32_t width,
				      uint32_t height,
				      int32_t hot_x, int32_t hot_y)
{
	struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
	struct virtio_gpu_output *output =
		container_of(crtc, struct virtio_gpu_output, crtc);
	struct drm_gem_object *gobj = NULL;
	struct virtio_gpu_object *qobj = NULL;
	struct virtio_gpu_fence *fence = NULL;
	int ret = 0;

	if (handle == 0) {
		virtio_gpu_hide_cursor(vgdev, output);
		return 0;
	}

	/* lookup the cursor */
	gobj = drm_gem_object_lookup(crtc->dev, file_priv, handle);
	if (gobj == NULL)
		return -ENOENT;

	qobj = gem_to_virtio_gpu_obj(gobj);

	if (!qobj->hw_res_handle) {
		ret = -EINVAL;
		goto out;
	}

	virtio_gpu_cmd_transfer_to_host_2d(vgdev, qobj->hw_res_handle, 0,
					   cpu_to_le32(64),
					   cpu_to_le32(64),
					   0, 0, &fence);
	ret = virtio_gpu_object_reserve(qobj, false);
	if (!ret) {
		reservation_object_add_excl_fence(qobj->tbo.resv,
						  &fence->f);
		fence_put(&fence->f);
		virtio_gpu_object_unreserve(qobj);
		virtio_gpu_object_wait(qobj, false);
	}

	output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
	output->cursor.resource_id = cpu_to_le32(qobj->hw_res_handle);
	output->cursor.hot_x = cpu_to_le32(hot_x);
	output->cursor.hot_y = cpu_to_le32(hot_y);
	virtio_gpu_cursor_ping(vgdev, output);
	ret = 0;

out:
	drm_gem_object_unreference_unlocked(gobj);
	return ret;
}

static int virtio_gpu_crtc_cursor_move(struct drm_crtc *crtc,
				    int x, int y)
{
	struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
	struct virtio_gpu_output *output =
		container_of(crtc, struct virtio_gpu_output, crtc);

	output->cursor.hdr.type = cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
	output->cursor.pos.x = cpu_to_le32(x);
	output->cursor.pos.y = cpu_to_le32(y);
	virtio_gpu_cursor_ping(vgdev, output);
	return 0;
}

static int virtio_gpu_page_flip(struct drm_crtc *crtc,
				struct drm_framebuffer *fb,
				struct drm_pending_vblank_event *event,
				uint32_t flags)
{
	struct virtio_gpu_device *vgdev = crtc->dev->dev_private;
	struct virtio_gpu_output *output =
		container_of(crtc, struct virtio_gpu_output, crtc);
	struct drm_plane *plane = crtc->primary;
	struct virtio_gpu_framebuffer *vgfb;
	struct virtio_gpu_object *bo;
	unsigned long irqflags;
	uint32_t handle;

	plane->fb = fb;
	vgfb = to_virtio_gpu_framebuffer(plane->fb);
	bo = gem_to_virtio_gpu_obj(vgfb->obj);
	handle = bo->hw_res_handle;

	DRM_DEBUG("handle 0x%x%s, crtc %dx%d\n", handle,
		  bo->dumb ? ", dumb" : "",
		  crtc->mode.hdisplay, crtc->mode.vdisplay);
	if (bo->dumb) {
		virtio_gpu_cmd_transfer_to_host_2d
			(vgdev, handle, 0,
			 cpu_to_le32(crtc->mode.hdisplay),
			 cpu_to_le32(crtc->mode.vdisplay),
			 0, 0, NULL);
	}
	virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
				   crtc->mode.hdisplay,
				   crtc->mode.vdisplay, 0, 0);
	virtio_gpu_cmd_resource_flush(vgdev, handle, 0, 0,
				      crtc->mode.hdisplay,
				      crtc->mode.vdisplay);

	if (event) {
		spin_lock_irqsave(&crtc->dev->event_lock, irqflags);
		drm_send_vblank_event(crtc->dev, -1, event);
		spin_unlock_irqrestore(&crtc->dev->event_lock, irqflags);
	}

	return 0;
}

static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {
	.cursor_set2            = virtio_gpu_crtc_cursor_set,
	.cursor_move            = virtio_gpu_crtc_cursor_move,
	.gamma_set              = virtio_gpu_crtc_gamma_set,
	.set_config             = drm_atomic_helper_set_config,
	.destroy                = drm_crtc_cleanup,

	.page_flip              = virtio_gpu_page_flip,
	.reset                  = drm_atomic_helper_crtc_reset,
	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
	.atomic_destroy_state   = drm_atomic_helper_crtc_destroy_state,
};

static void virtio_gpu_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
	struct virtio_gpu_framebuffer *virtio_gpu_fb
		= to_virtio_gpu_framebuffer(fb);

	if (virtio_gpu_fb->obj)
		drm_gem_object_unreference_unlocked(virtio_gpu_fb->obj);
	drm_framebuffer_cleanup(fb);
	kfree(virtio_gpu_fb);
}

static int
virtio_gpu_framebuffer_surface_dirty(struct drm_framebuffer *fb,
				     struct drm_file *file_priv,
				     unsigned flags, unsigned color,
				     struct drm_clip_rect *clips,
				     unsigned num_clips)
{
	struct virtio_gpu_framebuffer *virtio_gpu_fb
		= to_virtio_gpu_framebuffer(fb);

	return virtio_gpu_surface_dirty(virtio_gpu_fb, clips, num_clips);
}

static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = {
	.destroy = virtio_gpu_user_framebuffer_destroy,
	.dirty = virtio_gpu_framebuffer_surface_dirty,
};

int
virtio_gpu_framebuffer_init(struct drm_device *dev,
			    struct virtio_gpu_framebuffer *vgfb,
			    struct drm_mode_fb_cmd2 *mode_cmd,
			    struct drm_gem_object *obj)
{
	int ret;
	struct virtio_gpu_object *bo;
	vgfb->obj = obj;

	bo = gem_to_virtio_gpu_obj(obj);

	ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs);
	if (ret) {
		vgfb->obj = NULL;
		return ret;
	}
	drm_helper_mode_fill_fb_struct(&vgfb->base, mode_cmd);

	spin_lock_init(&vgfb->dirty_lock);
	vgfb->x1 = vgfb->y1 = INT_MAX;
	vgfb->x2 = vgfb->y2 = 0;
	return 0;
}

static bool virtio_gpu_crtc_mode_fixup(struct drm_crtc *crtc,
				       const struct drm_display_mode *mode,
				       struct drm_display_mode *adjusted_mode)
{
	return true;
}

static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
	struct drm_device *dev = crtc->dev;
	struct virtio_gpu_device *vgdev = dev->dev_private;
	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);

	virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
				   crtc->mode.hdisplay,
				   crtc->mode.vdisplay, 0, 0);
}

static void virtio_gpu_crtc_enable(struct drm_crtc *crtc)
{
}

static void virtio_gpu_crtc_disable(struct drm_crtc *crtc)
{
	struct drm_device *dev = crtc->dev;
	struct virtio_gpu_device *vgdev = dev->dev_private;
	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);

	virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);
}

static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
					struct drm_crtc_state *state)
{
	return 0;
}

static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
	.enable        = virtio_gpu_crtc_enable,
	.disable       = virtio_gpu_crtc_disable,
	.mode_fixup    = virtio_gpu_crtc_mode_fixup,
	.mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,
	.atomic_check  = virtio_gpu_crtc_atomic_check,
};

static bool virtio_gpu_enc_mode_fixup(struct drm_encoder *encoder,
				      const struct drm_display_mode *mode,
				      struct drm_display_mode *adjusted_mode)
{
	return true;
}

static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,
				    struct drm_display_mode *mode,
				    struct drm_display_mode *adjusted_mode)
{
}

static void virtio_gpu_enc_enable(struct drm_encoder *encoder)
{
}

static void virtio_gpu_enc_disable(struct drm_encoder *encoder)
{
}

static int virtio_gpu_conn_get_modes(struct drm_connector *connector)
{
	struct virtio_gpu_output *output =
		drm_connector_to_virtio_gpu_output(connector);
	struct drm_display_mode *mode = NULL;
	int count, width, height;

	width  = le32_to_cpu(output->info.r.width);
	height = le32_to_cpu(output->info.r.height);
	count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);

	if (width == 0 || height == 0) {
		width = XRES_DEF;
		height = YRES_DEF;
		drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
	} else {
		DRM_DEBUG("add mode: %dx%d\n", width, height);
		mode = drm_cvt_mode(connector->dev, width, height, 60,
				    false, false, false);
		mode->type |= DRM_MODE_TYPE_PREFERRED;
		drm_mode_probed_add(connector, mode);
		count++;
	}

	return count;
}

static int virtio_gpu_conn_mode_valid(struct drm_connector *connector,
				      struct drm_display_mode *mode)
{
	struct virtio_gpu_output *output =
		drm_connector_to_virtio_gpu_output(connector);
	int width, height;

	width  = le32_to_cpu(output->info.r.width);
	height = le32_to_cpu(output->info.r.height);

	if (!(mode->type & DRM_MODE_TYPE_PREFERRED))
		return MODE_OK;
	if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF)
		return MODE_OK;
	if (mode->hdisplay <= width  && mode->hdisplay >= width - 16 &&
	    mode->vdisplay <= height && mode->vdisplay >= height - 16)
		return MODE_OK;

	DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay);
	return MODE_BAD;
}

static struct drm_encoder*
virtio_gpu_best_encoder(struct drm_connector *connector)
{
	struct virtio_gpu_output *virtio_gpu_output =
		drm_connector_to_virtio_gpu_output(connector);

	return &virtio_gpu_output->enc;
}

static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = {
	.mode_fixup = virtio_gpu_enc_mode_fixup,
	.mode_set   = virtio_gpu_enc_mode_set,
	.enable     = virtio_gpu_enc_enable,
	.disable    = virtio_gpu_enc_disable,
};

static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = {
	.get_modes    = virtio_gpu_conn_get_modes,
	.mode_valid   = virtio_gpu_conn_mode_valid,
	.best_encoder = virtio_gpu_best_encoder,
};

static void virtio_gpu_conn_save(struct drm_connector *connector)
{
	DRM_DEBUG("\n");
}

static void virtio_gpu_conn_restore(struct drm_connector *connector)
{
	DRM_DEBUG("\n");
}

static enum drm_connector_status virtio_gpu_conn_detect(
			struct drm_connector *connector,
			bool force)
{
	struct virtio_gpu_output *output =
		drm_connector_to_virtio_gpu_output(connector);

	if (output->info.enabled)
		return connector_status_connected;
	else
		return connector_status_disconnected;
}

static void virtio_gpu_conn_destroy(struct drm_connector *connector)
{
	struct virtio_gpu_output *virtio_gpu_output =
		drm_connector_to_virtio_gpu_output(connector);

	drm_connector_unregister(connector);
	drm_connector_cleanup(connector);
	kfree(virtio_gpu_output);
}

static const struct drm_connector_funcs virtio_gpu_connector_funcs = {
	.dpms = drm_atomic_helper_connector_dpms,
	.save = virtio_gpu_conn_save,
	.restore = virtio_gpu_conn_restore,
	.detect = virtio_gpu_conn_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.destroy = virtio_gpu_conn_destroy,
	.reset = drm_atomic_helper_connector_reset,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};

static const struct drm_encoder_funcs virtio_gpu_enc_funcs = {
	.destroy = drm_encoder_cleanup,
};

static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index)
{
	struct drm_device *dev = vgdev->ddev;
	struct virtio_gpu_output *output = vgdev->outputs + index;
	struct drm_connector *connector = &output->conn;
	struct drm_encoder *encoder = &output->enc;
	struct drm_crtc *crtc = &output->crtc;
	struct drm_plane *plane;

	output->index = index;
	if (index == 0) {
		output->info.enabled = cpu_to_le32(true);
		output->info.r.width = cpu_to_le32(XRES_DEF);
		output->info.r.height = cpu_to_le32(YRES_DEF);
	}

	plane = virtio_gpu_plane_init(vgdev, index);
	if (IS_ERR(plane))
		return PTR_ERR(plane);
	drm_crtc_init_with_planes(dev, crtc, plane, NULL,
				  &virtio_gpu_crtc_funcs);
	drm_mode_crtc_set_gamma_size(crtc, 256);
	drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);
	plane->crtc = crtc;

	drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,
			   DRM_MODE_CONNECTOR_VIRTUAL);
	drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs);

	drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs,
			 DRM_MODE_ENCODER_VIRTUAL);
	drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs);
	encoder->possible_crtcs = 1 << index;

	drm_mode_connector_attach_encoder(connector, encoder);
	drm_connector_register(connector);
	return 0;
}

static struct drm_framebuffer *
virtio_gpu_user_framebuffer_create(struct drm_device *dev,
				   struct drm_file *file_priv,
				   struct drm_mode_fb_cmd2 *mode_cmd)
{
	struct drm_gem_object *obj = NULL;
	struct virtio_gpu_framebuffer *virtio_gpu_fb;
	int ret;

	/* lookup object associated with res handle */
	obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
	if (!obj)
		return ERR_PTR(-EINVAL);

	virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);
	if (virtio_gpu_fb == NULL)
		return ERR_PTR(-ENOMEM);

	ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);
	if (ret) {
		kfree(virtio_gpu_fb);
		if (obj)
			drm_gem_object_unreference_unlocked(obj);
		return NULL;
	}

	return &virtio_gpu_fb->base;
}

static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {
	.fb_create = virtio_gpu_user_framebuffer_create,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
};

int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev)
{
	int i;

	drm_mode_config_init(vgdev->ddev);
	vgdev->ddev->mode_config.funcs = (void *)&virtio_gpu_mode_funcs;

	/* modes will be validated against the framebuffer size */
	vgdev->ddev->mode_config.min_width = XRES_MIN;
	vgdev->ddev->mode_config.min_height = YRES_MIN;
	vgdev->ddev->mode_config.max_width = XRES_MAX;
	vgdev->ddev->mode_config.max_height = YRES_MAX;

	for (i = 0 ; i < vgdev->num_scanouts; ++i)
		vgdev_output_init(vgdev, i);

        drm_mode_config_reset(vgdev->ddev);
	return 0;
}

void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
{
	virtio_gpu_fbdev_fini(vgdev);
	drm_mode_config_cleanup(vgdev->ddev);
}