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/*
* Copyright © 2008 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Soft-
* ware"), to deal in the Software without restriction, including without
* limitation the rights to use, copy, modify, merge, publish, distribute,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, provided that the above copyright
* notice(s) and this permission notice appear in all copies of the Soft-
* ware and that both the above copyright notice(s) and this permission
* notice appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
* ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
* RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
* THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
* QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
* MANCE OF THIS SOFTWARE.
*
* Except as contained in this notice, the name of a copyright holder shall
* not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization of
* the copyright holder.
*
* Authors:
* Kristian Høgsberg (krh@redhat.com)
*/
#include <stdio.h>
#include <X11/Xlibint.h>
#include <X11/extensions/Xext.h>
#include <X11/extensions/extutil.h>
#include <X11/extensions/dri2proto.h>
#include <X11/extensions/dri2tokens.h>
#include <xf86drm.h>
#include <drm.h>
#include <fcntl.h>
#include <unistd.h>
#include "dri2.h"
static char dri2ExtensionName[] = DRI2_NAME;
static XExtensionInfo *dri2Info;
static XEXT_GENERATE_CLOSE_DISPLAY (DRI2CloseDisplay, dri2Info)
static /* const */ XExtensionHooks dri2ExtensionHooks = {
NULL, /* create_gc */
NULL, /* copy_gc */
NULL, /* flush_gc */
NULL, /* free_gc */
NULL, /* create_font */
NULL, /* free_font */
DRI2CloseDisplay, /* close_display */
};
static XEXT_GENERATE_FIND_DISPLAY (DRI2FindDisplay,
dri2Info,
dri2ExtensionName,
&dri2ExtensionHooks,
0, NULL)
static Bool
DRI2Connect(Display *dpy, XID window, char **driverName, char **deviceName)
{
XExtDisplayInfo *info = DRI2FindDisplay(dpy);
xDRI2ConnectReply rep;
xDRI2ConnectReq *req;
XextCheckExtension(dpy, info, dri2ExtensionName, False);
LockDisplay(dpy);
GetReq(DRI2Connect, req);
req->reqType = info->codes->major_opcode;
req->dri2ReqType = X_DRI2Connect;
req->window = window;
req->driverType = DRI2DriverDRI;
if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
return False;
}
if (rep.driverNameLength == 0 && rep.deviceNameLength == 0) {
UnlockDisplay(dpy);
SyncHandle();
return False;
}
*driverName = Xmalloc(rep.driverNameLength + 1);
if (*driverName == NULL) {
_XEatData(dpy,
((rep.driverNameLength + 3) & ~3) +
((rep.deviceNameLength + 3) & ~3));
UnlockDisplay(dpy);
SyncHandle();
return False;
}
_XReadPad(dpy, *driverName, rep.driverNameLength);
(*driverName)[rep.driverNameLength] = '\0';
*deviceName = Xmalloc(rep.deviceNameLength + 1);
if (*deviceName == NULL) {
Xfree(*driverName);
_XEatData(dpy, ((rep.deviceNameLength + 3) & ~3));
UnlockDisplay(dpy);
SyncHandle();
return False;
}
_XReadPad(dpy, *deviceName, rep.deviceNameLength);
(*deviceName)[rep.deviceNameLength] = '\0';
UnlockDisplay(dpy);
SyncHandle();
return True;
}
static Bool
DRI2Authenticate(Display * dpy, XID window, unsigned int magic)
{
XExtDisplayInfo *info = DRI2FindDisplay(dpy);
xDRI2AuthenticateReq *req;
xDRI2AuthenticateReply rep;
XextCheckExtension(dpy, info, dri2ExtensionName, False);
LockDisplay(dpy);
GetReq(DRI2Authenticate, req);
req->reqType = info->codes->major_opcode;
req->dri2ReqType = X_DRI2Authenticate;
req->window = window;
req->magic = magic;
if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) {
UnlockDisplay(dpy);
SyncHandle();
return False;
}
UnlockDisplay(dpy);
SyncHandle();
return rep.authenticated;
}
int dri2_open(Display *dpy)
{
drm_auth_t auth;
char *driver, *device;
int fd;
if (!DRI2Connect(dpy, DefaultRootWindow(dpy), &driver, &device))
return -1;
fd = open(device, O_RDWR);
if (fd < 0)
return -1;
if (drmIoctl(fd, DRM_IOCTL_GET_MAGIC, &auth))
goto err_fd;
if (!DRI2Authenticate(dpy, DefaultRootWindow(dpy), auth.magic))
goto err_fd;
return fd;
err_fd:
close(fd);
return -1;
}
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