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/*
* utils.c
*
* Common bits
*
* (c) 2009 Thomas White <taw@bitwiz.org.uk>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xmd.h>
#include <stdint.h>
#include <libdrm/drm.h>
#include "dri2.h"
#define RING_LOCALS int __count = 0;
#define OUT_REG(reg, val) cmds[__count++] = (reg); cmds[__count++] = (val);
int do_drm_authentication(Display *dpy)
{
int scrnum;
Window root;
char *driver;
char *device;
int fd;
drm_magic_t magic;
/* Get default screen, root window and default visual */
scrnum = DefaultScreen(dpy);
root = RootWindow(dpy, scrnum);
/* Get device name */
if ( !DRI2Connect(dpy, root, &driver, &device) ) {
fprintf(stderr, "DRI2Connect failed\n");
return -1;
}
/* Open DRM device */
fd = open(device, O_RDWR);
if ( fd < 0 ) {
fprintf(stderr, "Couldn't open '%s': %s\n",
device, strerror(errno));
return -1;
}
/* Get an authentication token */
if ( drmGetMagic(fd, &magic) ) {
fprintf(stderr, "drmGetMagic failed\n");
return -1;
}
/* Authenticate */
if ( DRI2Authenticate(dpy, root, magic) == False ) {
fprintf(stderr, "DRI2Authenticate failed\n");
return -1;
}
return fd;
}
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