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 #if IS_ENABLED(CONFIG_MTK_SMI)
13 
14 #define MTK_SMI_MMU_EN(port)	BIT(port)
15 
16 struct mtk_smi_larb_iommu {
17 	struct device *dev;
18 	unsigned int   mmu;
19 	unsigned char  bank[32];
20 };
21 
22 /*
23  * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter.
24  *                   It also initialize some basic setting(like iommu).
25  * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter.
26  * Both should be called in non-atomic context.
27  *
28  * Returns 0 if successful, negative on failure.
29  */
30 int mtk_smi_larb_get(struct device *larbdev);
31 void mtk_smi_larb_put(struct device *larbdev);
32 
33 #else
34 
mtk_smi_larb_get(struct device * larbdev)35 static inline int mtk_smi_larb_get(struct device *larbdev)
36 {
37 	return 0;
38 }
39 
mtk_smi_larb_put(struct device * larbdev)40 static inline void mtk_smi_larb_put(struct device *larbdev) { }
41 
42 #endif
43 
44 #endif
45