1 /*
2 * Copyright (C) 2016 Christian Gmeiner <christian.gmeiner@gmail.com>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 * Christian Gmeiner <christian.gmeiner@gmail.com>
25 */
26
27 #include "renderonly/renderonly.h"
28
29 #include <errno.h>
30 #include <fcntl.h>
31 #include <stdio.h>
32 #include <xf86drm.h>
33
34 #include "frontend/drm_driver.h"
35 #include "pipe/p_screen.h"
36 #include "util/format/u_format.h"
37 #include "util/u_inlines.h"
38 #include "util/u_memory.h"
39
40 void
renderonly_scanout_destroy(struct renderonly_scanout * scanout,struct renderonly * ro)41 renderonly_scanout_destroy(struct renderonly_scanout *scanout,
42 struct renderonly *ro)
43 {
44 struct drm_mode_destroy_dumb destroy_dumb = {0};
45
46 if (ro->kms_fd != -1) {
47 destroy_dumb.handle = scanout->handle;
48 drmIoctl(ro->kms_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
49 }
50 FREE(scanout);
51 }
52
53 struct renderonly_scanout *
renderonly_create_kms_dumb_buffer_for_resource(struct pipe_resource * rsc,struct renderonly * ro,struct winsys_handle * out_handle)54 renderonly_create_kms_dumb_buffer_for_resource(struct pipe_resource *rsc,
55 struct renderonly *ro,
56 struct winsys_handle *out_handle)
57 {
58 struct renderonly_scanout *scanout;
59 int err;
60 struct drm_mode_create_dumb create_dumb = {
61 .width = rsc->width0,
62 .height = rsc->height0,
63 .bpp = util_format_get_blocksizebits(rsc->format),
64 };
65 struct drm_mode_destroy_dumb destroy_dumb = {0};
66
67 scanout = CALLOC_STRUCT(renderonly_scanout);
68 if (!scanout)
69 return NULL;
70
71 /* create dumb buffer at scanout GPU */
72 err = drmIoctl(ro->kms_fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
73 if (err < 0) {
74 fprintf(stderr, "DRM_IOCTL_MODE_CREATE_DUMB failed: %s\n",
75 strerror(errno));
76 goto free_scanout;
77 }
78
79 scanout->handle = create_dumb.handle;
80 scanout->stride = create_dumb.pitch;
81
82 if (!out_handle)
83 return scanout;
84
85 /* fill in winsys handle */
86 memset(out_handle, 0, sizeof(*out_handle));
87 out_handle->type = WINSYS_HANDLE_TYPE_FD;
88 out_handle->stride = create_dumb.pitch;
89
90 err = drmPrimeHandleToFD(ro->kms_fd, create_dumb.handle, O_CLOEXEC,
91 (int *)&out_handle->handle);
92 if (err < 0) {
93 fprintf(stderr, "failed to export dumb buffer: %s\n", strerror(errno));
94 goto free_dumb;
95 }
96
97 return scanout;
98
99 free_dumb:
100 destroy_dumb.handle = scanout->handle;
101 drmIoctl(ro->kms_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
102
103 free_scanout:
104 FREE(scanout);
105
106 return NULL;
107 }
108
109 struct renderonly_scanout *
renderonly_create_gpu_import_for_resource(struct pipe_resource * rsc,struct renderonly * ro,struct winsys_handle * out_handle)110 renderonly_create_gpu_import_for_resource(struct pipe_resource *rsc,
111 struct renderonly *ro,
112 struct winsys_handle *out_handle)
113 {
114 struct pipe_screen *screen = rsc->screen;
115 struct renderonly_scanout *scanout;
116 boolean status;
117 int fd, err;
118 struct winsys_handle handle = {
119 .type = WINSYS_HANDLE_TYPE_FD
120 };
121
122 scanout = CALLOC_STRUCT(renderonly_scanout);
123 if (!scanout)
124 return NULL;
125
126 status = screen->resource_get_handle(screen, NULL, rsc, &handle,
127 PIPE_HANDLE_USAGE_FRAMEBUFFER_WRITE);
128 if (!status)
129 goto free_scanout;
130
131 scanout->stride = handle.stride;
132 fd = handle.handle;
133
134 err = drmPrimeFDToHandle(ro->kms_fd, fd, &scanout->handle);
135 close(fd);
136
137 if (err < 0)
138 goto free_scanout;
139
140 return scanout;
141
142 free_scanout:
143 FREE(scanout);
144
145 return NULL;
146 }
147
148