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 "state_tracker/drm_driver.h"
35#include "pipe/p_screen.h"
36#include "util/u_format.h"
37#include "util/u_inlines.h"
38#include "util/u_memory.h"
39
40struct renderonly *
41renderonly_dup(const struct renderonly *ro)
42{
43   struct renderonly *copy;
44
45   copy = CALLOC_STRUCT(renderonly);
46   if (!copy)
47      return NULL;
48
49   memcpy(copy, ro, sizeof(*ro));
50
51   return copy;
52}
53
54void
55renderonly_scanout_destroy(struct renderonly_scanout *scanout,
56			   struct renderonly *ro)
57{
58   struct drm_mode_destroy_dumb destroy_dumb = { };
59
60   if (ro->kms_fd != -1) {
61      destroy_dumb.handle = scanout->handle;
62      drmIoctl(ro->kms_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
63   }
64   FREE(scanout);
65}
66
67struct renderonly_scanout *
68renderonly_create_kms_dumb_buffer_for_resource(struct pipe_resource *rsc,
69                                               struct renderonly *ro,
70                                               struct winsys_handle *out_handle)
71{
72   struct renderonly_scanout *scanout;
73   int err;
74   struct drm_mode_create_dumb create_dumb = {
75      .width = rsc->width0,
76      .height = rsc->height0,
77      .bpp = util_format_get_blocksizebits(rsc->format),
78   };
79   struct drm_mode_destroy_dumb destroy_dumb = { };
80
81   scanout = CALLOC_STRUCT(renderonly_scanout);
82   if (!scanout)
83      return NULL;
84
85   /* create dumb buffer at scanout GPU */
86   err = drmIoctl(ro->kms_fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
87   if (err < 0) {
88      fprintf(stderr, "DRM_IOCTL_MODE_CREATE_DUMB failed: %s\n",
89            strerror(errno));
90      goto free_scanout;
91   }
92
93   scanout->handle = create_dumb.handle;
94   scanout->stride = create_dumb.pitch;
95
96   if (!out_handle)
97      return scanout;
98
99   /* fill in winsys handle */
100   memset(out_handle, 0, sizeof(*out_handle));
101   out_handle->type = WINSYS_HANDLE_TYPE_FD;
102   out_handle->stride = create_dumb.pitch;
103
104   err = drmPrimeHandleToFD(ro->kms_fd, create_dumb.handle, O_CLOEXEC,
105         (int *)&out_handle->handle);
106   if (err < 0) {
107      fprintf(stderr, "failed to export dumb buffer: %s\n", strerror(errno));
108      goto free_dumb;
109   }
110
111   return scanout;
112
113free_dumb:
114   destroy_dumb.handle = scanout->handle;
115   drmIoctl(ro->kms_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
116
117free_scanout:
118   FREE(scanout);
119
120   return NULL;
121}
122
123struct renderonly_scanout *
124renderonly_create_gpu_import_for_resource(struct pipe_resource *rsc,
125                                          struct renderonly *ro,
126                                          struct winsys_handle *out_handle)
127{
128   struct pipe_screen *screen = rsc->screen;
129   struct renderonly_scanout *scanout;
130   boolean status;
131   int fd, err;
132   struct winsys_handle handle = {
133      .type = WINSYS_HANDLE_TYPE_FD
134   };
135
136   scanout = CALLOC_STRUCT(renderonly_scanout);
137   if (!scanout)
138      return NULL;
139
140   status = screen->resource_get_handle(screen, NULL, rsc, &handle,
141         PIPE_HANDLE_USAGE_FRAMEBUFFER_WRITE);
142   if (!status)
143      goto free_scanout;
144
145   scanout->stride = handle.stride;
146   fd = handle.handle;
147
148   err = drmPrimeFDToHandle(ro->kms_fd, fd, &scanout->handle);
149   close(fd);
150
151   if (err < 0) {
152      fprintf(stderr, "drmPrimeFDToHandle() failed: %s\n", strerror(errno));
153      goto free_scanout;
154   }
155
156   return scanout;
157
158free_scanout:
159   FREE(scanout);
160
161   return NULL;
162}
163
164