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1/*2 * Copyright 2017 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * 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 42void43nvkm_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 54int55nvkm_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