1 // SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
2 /*
3 *
4 * (C) COPYRIGHT 2011-2022 ARM Limited. All rights reserved.
5 *
6 * This program is free software and is provided to you under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation, and any use by you of this program is subject to the terms
9 * of such GNU license.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, you can access it online at
18 * http://www.gnu.org/licenses/gpl-2.0.html.
19 *
20 */
21
22 #include <linux/atomic.h>
23 #include <linux/list.h>
24 #include <linux/spinlock.h>
25 #include <mali_kbase_fence.h>
26 #include <mali_kbase.h>
27
28 /* Spin lock protecting all Mali fences as fence->lock. */
29 static DEFINE_SPINLOCK(kbase_fence_lock);
30
31 #if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
32 struct fence *
kbase_fence_out_new(struct kbase_jd_atom * katom)33 kbase_fence_out_new(struct kbase_jd_atom *katom)
34 #else
35 struct dma_fence *
36 kbase_fence_out_new(struct kbase_jd_atom *katom)
37 #endif
38 {
39 #if (KERNEL_VERSION(4, 10, 0) > LINUX_VERSION_CODE)
40 struct fence *fence;
41 #else
42 struct dma_fence *fence;
43 #endif
44
45 WARN_ON(katom->dma_fence.fence);
46
47 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
48 if (!fence)
49 return NULL;
50
51 dma_fence_init(fence,
52 &kbase_fence_ops,
53 &kbase_fence_lock,
54 katom->dma_fence.context,
55 atomic_inc_return(&katom->dma_fence.seqno));
56
57 katom->dma_fence.fence = fence;
58
59 return fence;
60 }
61
62