linux_kernel/drivers/gpu/drm/nouveau/nvif/device.c

/*
 * Copyright 2014 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs <bskeggs@redhat.com>
 */

#include <nvif/device.h>

u64
nvif_device_time(struct nvif_device *device)
{
	struct nv_device_time_v0 args = {};
	int ret = nvif_object_mthd(&device->object, NV_DEVICE_V0_TIME,
				   &args, sizeof(args));
	WARN_ON_ONCE(ret != 0);
	return args.time;
}

void
nvif_device_fini(struct nvif_device *device)
{
	nvif_user_fini(device);
	kfree(device->runlist);
	device->runlist = NULL;
	nvif_object_fini(&device->object);
}

int
nvif_device_init(struct nvif_object *parent, u32 handle, s32 oclass,
		 void *data, u32 size, struct nvif_device *device)
{
	int ret = nvif_object_init(parent, handle, oclass, data, size,
				   &device->object);
	device->runlist = NULL;
	device->user.func = NULL;
	if (ret == 0) {
		device->info.version = 0;
		ret = nvif_object_mthd(&device->object, NV_DEVICE_V0_INFO,
				       &device->info, sizeof(device->info));
	}
	return ret;
}