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 
18 struct mtk_smi_larb_iommu {
19 	struct device *dev;
20 	unsigned int   mmu;
21 };
22 
23 /*
24  * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter.
25  *                   It also initialize some basic setting(like iommu).
26  * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter.
27  * Both should be called in non-atomic context.
28  *
29  * Returns 0 if successful, negative on failure.
30  */
31 int mtk_smi_larb_get(struct device *larbdev);
32 void mtk_smi_larb_put(struct device *larbdev);
33 
34 #else
35 
mtk_smi_larb_get(struct device * larbdev)36 static inline int mtk_smi_larb_get(struct device *larbdev)
37 {
38 	return 0;
39 }
40 
mtk_smi_larb_put(struct device * larbdev)41 static inline void mtk_smi_larb_put(struct device *larbdev) { }
42 
43 #endif
44 
45 #endif
46