tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (c) 2015-2016 MediaTek Inc.
4 * Author: Yong Wu <yong.wu@mediatek.com>
5 */
6#ifndef MTK_IOMMU_SMI_H
7#define MTK_IOMMU_SMI_H
8
9#include <linux/bitops.h>
10#include <linux/device.h>
11
12#ifdef CONFIG_MTK_SMI
13
14#define MTK_LARB_NR_MAX 16
15
16#define MTK_SMI_MMU_EN(port) BIT(port)
17
18struct mtk_smi_larb_iommu {
19 struct device *dev;
20 unsigned int mmu;
21};
22
23struct mtk_smi_iommu {
24 unsigned int larb_nr;
25 struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX];
26};
27
28/*
29 * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter.
30 * It also initialize some basic setting(like iommu).
31 * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter.
32 * Both should be called in non-atomic context.
33 *
34 * Returns 0 if successful, negative on failure.
35 */
36int mtk_smi_larb_get(struct device *larbdev);
37void mtk_smi_larb_put(struct device *larbdev);
38
39#else
40
41static inline int mtk_smi_larb_get(struct device *larbdev)
42{
43 return 0;
44}
45
46static inline void mtk_smi_larb_put(struct device *larbdev) { }
47
48#endif
49
50#endif