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
40void
41renderonly_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
53struct renderonly_scanout *
54renderonly_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
99free_dumb:
100   destroy_dumb.handle = scanout->handle;
101   drmIoctl(ro->kms_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
102
103free_scanout:
104   FREE(scanout);
105
106   return NULL;
107}
108
109struct renderonly_scanout *
110renderonly_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
142free_scanout:
143   FREE(scanout);
144
145   return NULL;
146}
147
148