wfi
wfi();
radeon_wait_for_idle wfi;
wfi.magic = RADEON_PRIVATE_DATA_MAGIC;
wfi.keep_lock = keep_lock;
return ioctl( ai->fd, RADEON_WAITFORIDLE, &wfi, sizeof( wfi ));
radeon_wait_for_idle *wfi = (radeon_wait_for_idle *)buf;
if( wfi->magic != RADEON_PRIVATE_DATA_MAGIC )
Radeon_WaitForIdle( di, true, wfi->keep_lock );