summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/virtio/virtgpu_fb.c
blob: cde9f37581064828809555bb4808c38f7497d94e (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
/*
 * Copyright (C) 2015 Red Hat, Inc.
 * All Rights Reserved.
 *
 * 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 (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 NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
 */

#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include "virtgpu_drv.h"

#define VIRTIO_GPU_FBCON_POLL_PERIOD (HZ / 60)

struct virtio_gpu_fbdev {
	struct drm_fb_helper           helper;
	struct virtio_gpu_framebuffer  vgfb;
	struct virtio_gpu_device       *vgdev;
	struct delayed_work            work;
};

static int virtio_gpu_dirty_update(struct virtio_gpu_framebuffer *fb,
				   bool store, int x, int y,
				   int width, int height)
{
	struct drm_device *dev = fb->base.dev;
	struct virtio_gpu_device *vgdev = dev->dev_private;
	bool store_for_later = false;
	int bpp = fb->base.bits_per_pixel / 8;
	int x2, y2;
	unsigned long flags;
	struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->obj);

	if ((width <= 0) ||
	    (x + width > fb->base.width) ||
	    (y + height > fb->base.height)) {
		DRM_DEBUG("values out of range %dx%d+%d+%d, fb %dx%d\n",
			  width, height, x, y,
			  fb->base.width, fb->base.height);
		return -EINVAL;
	}

	/*
	 * Can be called with pretty much any context (console output
	 * path).  If we are in atomic just store the dirty rect info
	 * to send out the update later.
	 *
	 * Can't test inside spin lock.
	 */
	if (in_atomic() || store)
		store_for_later = true;

	x2 = x + width - 1;
	y2 = y + height - 1;

	spin_lock_irqsave(&fb->dirty_lock, flags);

	if (fb->y1 < y)
		y = fb->y1;
	if (fb->y2 > y2)
		y2 = fb->y2;
	if (fb->x1 < x)
		x = fb->x1;
	if (fb->x2 > x2)
		x2 = fb->x2;

	if (store_for_later) {
		fb->x1 = x;
		fb->x2 = x2;
		fb->y1 = y;
		fb->y2 = y2;
		spin_unlock_irqrestore(&fb->dirty_lock, flags);
		return 0;
	}

	fb->x1 = fb->y1 = INT_MAX;
	fb->x2 = fb->y2 = 0;

	spin_unlock_irqrestore(&fb->dirty_lock, flags);

	{
		uint32_t offset;
		uint32_t w = x2 - x + 1;
		uint32_t h = y2 - y + 1;

		offset = (y * fb->base.pitches[0]) + x * bpp;

		virtio_gpu_cmd_transfer_to_host_2d(vgdev, obj->hw_res_handle,
						   offset,
						   cpu_to_le32(w),
						   cpu_to_le32(h),
						   cpu_to_le32(x),
						   cpu_to_le32(y),
						   NULL);

	}
	virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
				      x, y, x2 - x + 1, y2 - y + 1);
	return 0;
}

int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *vgfb,
			     struct drm_clip_rect *clips,
			     unsigned num_clips)
{
	struct virtio_gpu_device *vgdev = vgfb->base.dev->dev_private;
	struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(vgfb->obj);
	struct drm_clip_rect norect;
	struct drm_clip_rect *clips_ptr;
	int left, right, top, bottom;
	int i;
	int inc = 1;
	if (!num_clips) {
		num_clips = 1;
		clips = &norect;
		norect.x1 = norect.y1 = 0;
		norect.x2 = vgfb->base.width;
		norect.y2 = vgfb->base.height;
	}
	left = clips->x1;
	right = clips->x2;
	top = clips->y1;
	bottom = clips->y2;

	/* skip the first clip rect */
	for (i = 1, clips_ptr = clips + inc;
	     i < num_clips; i++, clips_ptr += inc) {
		left = min_t(int, left, (int)clips_ptr->x1);
		right = max_t(int, right, (int)clips_ptr->x2);
		top = min_t(int, top, (int)clips_ptr->y1);
		bottom = max_t(int, bottom, (int)clips_ptr->y2);
	}

	if (obj->dumb)
		return virtio_gpu_dirty_update(vgfb, false, left, top,
					       right - left, bottom - top);

	virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
				      left, top, right - left, bottom - top);
	return 0;
}

static void virtio_gpu_fb_dirty_work(struct work_struct *work)
{
	struct delayed_work *delayed_work = to_delayed_work(work);
	struct virtio_gpu_fbdev *vfbdev =
		container_of(delayed_work, struct virtio_gpu_fbdev, work);
	struct virtio_gpu_framebuffer *vgfb = &vfbdev->vgfb;

	virtio_gpu_dirty_update(&vfbdev->vgfb, false, vgfb->x1, vgfb->y1,
				vgfb->x2 - vgfb->x1, vgfb->y2 - vgfb->y1);
}

static void virtio_gpu_3d_fillrect(struct fb_info *info,
				   const struct fb_fillrect *rect)
{
	struct virtio_gpu_fbdev *vfbdev = info->par;
	drm_fb_helper_sys_fillrect(info, rect);
	virtio_gpu_dirty_update(&vfbdev->vgfb, true, rect->dx, rect->dy,
			     rect->width, rect->height);
	schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
}

static void virtio_gpu_3d_copyarea(struct fb_info *info,
				   const struct fb_copyarea *area)
{
	struct virtio_gpu_fbdev *vfbdev = info->par;
	drm_fb_helper_sys_copyarea(info, area);
	virtio_gpu_dirty_update(&vfbdev->vgfb, true, area->dx, area->dy,
			   area->width, area->height);
	schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
}

static void virtio_gpu_3d_imageblit(struct fb_info *info,
				    const struct fb_image *image)
{
	struct virtio_gpu_fbdev *vfbdev = info->par;
	drm_fb_helper_sys_imageblit(info, image);
	virtio_gpu_dirty_update(&vfbdev->vgfb, true, image->dx, image->dy,
			     image->width, image->height);
	schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
}

static struct fb_ops virtio_gpufb_ops = {
	.owner = THIS_MODULE,
	DRM_FB_HELPER_DEFAULT_OPS,
	.fb_fillrect = virtio_gpu_3d_fillrect,
	.fb_copyarea = virtio_gpu_3d_copyarea,
	.fb_imageblit = virtio_gpu_3d_imageblit,
};

static int virtio_gpu_vmap_fb(struct virtio_gpu_device *vgdev,
			      struct virtio_gpu_object *obj)
{
	return virtio_gpu_object_kmap(obj, NULL);
}

static int virtio_gpufb_create(struct drm_fb_helper *helper,
			       struct drm_fb_helper_surface_size *sizes)
{
	struct virtio_gpu_fbdev *vfbdev =
		container_of(helper, struct virtio_gpu_fbdev, helper);
	struct drm_device *dev = helper->dev;
	struct virtio_gpu_device *vgdev = dev->dev_private;
	struct fb_info *info;
	struct drm_framebuffer *fb;
	struct drm_mode_fb_cmd2 mode_cmd = {};
	struct virtio_gpu_object *obj;
	uint32_t resid, format, size;
	int ret;

	mode_cmd.width = sizes->surface_width;
	mode_cmd.height = sizes->surface_height;
	mode_cmd.pitches[0] = mode_cmd.width * 4;
	mode_cmd.pixel_format = drm_mode_legacy_fb_format(32, 24);

	switch (mode_cmd.pixel_format) {
#ifdef __BIG_ENDIAN
	case DRM_FORMAT_XRGB8888:
		format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
		break;
	case DRM_FORMAT_ARGB8888:
		format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
		break;
	case DRM_FORMAT_BGRX8888:
		format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
		break;
	case DRM_FORMAT_BGRA8888:
		format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
		break;
	case DRM_FORMAT_RGBX8888:
		format = VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM;
		break;
	case DRM_FORMAT_RGBA8888:
		format = VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM;
		break;
	case DRM_FORMAT_XBGR8888:
		format = VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM;
		break;
	case DRM_FORMAT_ABGR8888:
		format = VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM;
		break;
#else
	case DRM_FORMAT_XRGB8888:
		format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
		break;
	case DRM_FORMAT_ARGB8888:
		format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
		break;
	case DRM_FORMAT_BGRX8888:
		format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
		break;
	case DRM_FORMAT_BGRA8888:
		format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
		break;
	case DRM_FORMAT_RGBX8888:
		format = VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM;
		break;
	case DRM_FORMAT_RGBA8888:
		format = VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM;
		break;
	case DRM_FORMAT_XBGR8888:
		format = VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM;
		break;
	case DRM_FORMAT_ABGR8888:
		format = VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM;
		break;
#endif
	default:
		DRM_ERROR("failed to find virtio gpu format for %d\n",
			  mode_cmd.pixel_format);
		return -EINVAL;
	}

	size = mode_cmd.pitches[0] * mode_cmd.height;
	obj = virtio_gpu_alloc_object(dev, size, false, true);
	if (IS_ERR(obj))
		return PTR_ERR(obj);

	virtio_gpu_resource_id_get(vgdev, &resid);
	virtio_gpu_cmd_create_resource(vgdev, resid, format,
				       mode_cmd.width, mode_cmd.height);

	ret = virtio_gpu_vmap_fb(vgdev, obj);
	if (ret) {
		DRM_ERROR("failed to vmap fb %d\n", ret);
		goto err_obj_vmap;
	}

	/* attach the object to the resource */
	ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
	if (ret)
		goto err_obj_attach;

	info = drm_fb_helper_alloc_fbi(helper);
	if (IS_ERR(info)) {
		ret = PTR_ERR(info);
		goto err_fb_alloc;
	}

	info->par = helper;

	ret = virtio_gpu_framebuffer_init(dev, &vfbdev->vgfb,
					  &mode_cmd, &obj->gem_base);
	if (ret)
		goto err_fb_init;

	fb = &vfbdev->vgfb.base;

	vfbdev->helper.fb = fb;

	strcpy(info->fix.id, "virtiodrmfb");
	info->flags = FBINFO_DEFAULT;
	info->fbops = &virtio_gpufb_ops;
	info->pixmap.flags = FB_PIXMAP_SYSTEM;

	info->screen_buffer = obj->vmap;
	info->screen_size = obj->gem_base.size;
	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
	drm_fb_helper_fill_var(info, &vfbdev->helper,
			       sizes->fb_width, sizes->fb_height);

	info->fix.mmio_start = 0;
	info->fix.mmio_len = 0;
	return 0;

err_fb_init:
	drm_fb_helper_release_fbi(helper);
err_fb_alloc:
	virtio_gpu_cmd_resource_inval_backing(vgdev, resid);
err_obj_attach:
err_obj_vmap:
	virtio_gpu_gem_free_object(&obj->gem_base);
	return ret;
}

static int virtio_gpu_fbdev_destroy(struct drm_device *dev,
				    struct virtio_gpu_fbdev *vgfbdev)
{
	struct virtio_gpu_framebuffer *vgfb = &vgfbdev->vgfb;

	drm_fb_helper_unregister_fbi(&vgfbdev->helper);
	drm_fb_helper_release_fbi(&vgfbdev->helper);

	if (vgfb->obj)
		vgfb->obj = NULL;
	drm_fb_helper_fini(&vgfbdev->helper);
	drm_framebuffer_cleanup(&vgfb->base);

	return 0;
}
static struct drm_fb_helper_funcs virtio_gpu_fb_helper_funcs = {
	.fb_probe = virtio_gpufb_create,
};

int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev)
{
	struct virtio_gpu_fbdev *vgfbdev;
	int bpp_sel = 32; /* TODO: parameter from somewhere? */
	int ret;

	vgfbdev = kzalloc(sizeof(struct virtio_gpu_fbdev), GFP_KERNEL);
	if (!vgfbdev)
		return -ENOMEM;

	vgfbdev->vgdev = vgdev;
	vgdev->vgfbdev = vgfbdev;
	INIT_DELAYED_WORK(&vgfbdev->work, virtio_gpu_fb_dirty_work);

	drm_fb_helper_prepare(vgdev->ddev, &vgfbdev->helper,
			      &virtio_gpu_fb_helper_funcs);
	ret = drm_fb_helper_init(vgdev->ddev, &vgfbdev->helper,
				 vgdev->num_scanouts,
				 VIRTIO_GPUFB_CONN_LIMIT);
	if (ret) {
		kfree(vgfbdev);
		return ret;
	}

	drm_fb_helper_single_add_all_connectors(&vgfbdev->helper);
	drm_fb_helper_initial_config(&vgfbdev->helper, bpp_sel);
	return 0;
}

void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev)
{
	if (!vgdev->vgfbdev)
		return;

	virtio_gpu_fbdev_destroy(vgdev->ddev, vgdev->vgfbdev);
	kfree(vgdev->vgfbdev);
	vgdev->vgfbdev = NULL;
}