summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/virtio/virtgpu_fb.c
blob: b07584b1c2bf7be15a40a72f545138f204dd0177 (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
/*
 * 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"

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.format->cpp[0];
	int x2, y2;
	unsigned long flags;
	struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->base.obj[0]);

	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,
						   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 int num_clips)
{
	struct virtio_gpu_device *vgdev = vgfb->base.dev->dev_private;
	struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
	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;
}