1/*
2 * Copyright 2017 Red Hat Inc.
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 shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Ben Skeggs <bskeggs@redhat.com>
23 */
24#include "head.h"
25
26#include <core/client.h>
27
28#include <nvif/cl0046.h>
29#include <nvif/unpack.h>
30
31struct nvkm_head *
32nvkm_head_find(struct nvkm_disp *disp, int id)
33{
34	struct nvkm_head *head;
35	list_for_each_entry(head, &disp->heads, head) {
36		if (head->id == id)
37			return head;
38	}
39	return NULL;
40}
41
42void
43nvkm_head_del(struct nvkm_head **phead)
44{
45	struct nvkm_head *head = *phead;
46	if (head) {
47		HEAD_DBG(head, "dtor");
48		list_del(&head->head);
49		kfree(*phead);
50		*phead = NULL;
51	}
52}
53
54int
55nvkm_head_new_(const struct nvkm_head_func *func,
56	       struct nvkm_disp *disp, int id)
57{
58	struct nvkm_head *head;
59	if (!(head = kzalloc(sizeof(*head), GFP_KERNEL)))
60		return -ENOMEM;
61	head->func = func;
62	head->disp = disp;
63	head->id = id;
64	list_add_tail(&head->head, &disp->heads);
65	HEAD_DBG(head, "ctor");
66	return 0;
67}
68