]> Git Repo - linux.git/blob - drivers/gpu/drm/virtio/virtgpu_fb.c
Merge tag 'v5.1-rc1' into regulator-5.2
[linux.git] / drivers / gpu / drm / virtio / virtgpu_fb.c
1 /*
2  * Copyright (C) 2015 Red Hat, Inc.
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial
15  * portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  */
25
26 #include <drm/drmP.h>
27 #include <drm/drm_fb_helper.h>
28 #include "virtgpu_drv.h"
29
30 static int virtio_gpu_dirty_update(struct virtio_gpu_framebuffer *fb,
31                                    bool store, int x, int y,
32                                    int width, int height)
33 {
34         struct drm_device *dev = fb->base.dev;
35         struct virtio_gpu_device *vgdev = dev->dev_private;
36         bool store_for_later = false;
37         int bpp = fb->base.format->cpp[0];
38         int x2, y2;
39         unsigned long flags;
40         struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->base.obj[0]);
41
42         if ((width <= 0) ||
43             (x + width > fb->base.width) ||
44             (y + height > fb->base.height)) {
45                 DRM_DEBUG("values out of range %dx%d+%d+%d, fb %dx%d\n",
46                           width, height, x, y,
47                           fb->base.width, fb->base.height);
48                 return -EINVAL;
49         }
50
51         /*
52          * Can be called with pretty much any context (console output
53          * path).  If we are in atomic just store the dirty rect info
54          * to send out the update later.
55          *
56          * Can't test inside spin lock.
57          */
58         if (in_atomic() || store)
59                 store_for_later = true;
60
61         x2 = x + width - 1;
62         y2 = y + height - 1;
63
64         spin_lock_irqsave(&fb->dirty_lock, flags);
65
66         if (fb->y1 < y)
67                 y = fb->y1;
68         if (fb->y2 > y2)
69                 y2 = fb->y2;
70         if (fb->x1 < x)
71                 x = fb->x1;
72         if (fb->x2 > x2)
73                 x2 = fb->x2;
74
75         if (store_for_later) {
76                 fb->x1 = x;
77                 fb->x2 = x2;
78                 fb->y1 = y;
79                 fb->y2 = y2;
80                 spin_unlock_irqrestore(&fb->dirty_lock, flags);
81                 return 0;
82         }
83
84         fb->x1 = fb->y1 = INT_MAX;
85         fb->x2 = fb->y2 = 0;
86
87         spin_unlock_irqrestore(&fb->dirty_lock, flags);
88
89         {
90                 uint32_t offset;
91                 uint32_t w = x2 - x + 1;
92                 uint32_t h = y2 - y + 1;
93
94                 offset = (y * fb->base.pitches[0]) + x * bpp;
95
96                 virtio_gpu_cmd_transfer_to_host_2d(vgdev, obj,
97                                                    offset,
98                                                    cpu_to_le32(w),
99                                                    cpu_to_le32(h),
100                                                    cpu_to_le32(x),
101                                                    cpu_to_le32(y),
102                                                    NULL);
103
104         }
105         virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
106                                       x, y, x2 - x + 1, y2 - y + 1);
107         return 0;
108 }
109
110 int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *vgfb,
111                              struct drm_clip_rect *clips,
112                              unsigned int num_clips)
113 {
114         struct virtio_gpu_device *vgdev = vgfb->base.dev->dev_private;
115         struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
116         struct drm_clip_rect norect;
117         struct drm_clip_rect *clips_ptr;
118         int left, right, top, bottom;
119         int i;
120         int inc = 1;
121
122         if (!num_clips) {
123                 num_clips = 1;
124                 clips = &norect;
125                 norect.x1 = norect.y1 = 0;
126                 norect.x2 = vgfb->base.width;
127                 norect.y2 = vgfb->base.height;
128         }
129         left = clips->x1;
130         right = clips->x2;
131         top = clips->y1;
132         bottom = clips->y2;
133
134         /* skip the first clip rect */
135         for (i = 1, clips_ptr = clips + inc;
136              i < num_clips; i++, clips_ptr += inc) {
137                 left = min_t(int, left, (int)clips_ptr->x1);
138                 right = max_t(int, right, (int)clips_ptr->x2);
139                 top = min_t(int, top, (int)clips_ptr->y1);
140                 bottom = max_t(int, bottom, (int)clips_ptr->y2);
141         }
142
143         if (obj->dumb)
144                 return virtio_gpu_dirty_update(vgfb, false, left, top,
145                                                right - left, bottom - top);
146
147         virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
148                                       left, top, right - left, bottom - top);
149         return 0;
150 }
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