1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (c) 2015-2016 MediaTek Inc. 4*4882a593Smuzhiyun * Author: Yong Wu <yong.wu@mediatek.com> 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun #ifndef MTK_IOMMU_SMI_H 7*4882a593Smuzhiyun #define MTK_IOMMU_SMI_H 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #include <linux/bitops.h> 10*4882a593Smuzhiyun #include <linux/device.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_MTK_SMI) 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #define MTK_SMI_MMU_EN(port) BIT(port) 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun struct mtk_smi_larb_iommu { 17*4882a593Smuzhiyun struct device *dev; 18*4882a593Smuzhiyun unsigned int mmu; 19*4882a593Smuzhiyun unsigned char bank[32]; 20*4882a593Smuzhiyun }; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun /* 23*4882a593Smuzhiyun * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter. 24*4882a593Smuzhiyun * It also initialize some basic setting(like iommu). 25*4882a593Smuzhiyun * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter. 26*4882a593Smuzhiyun * Both should be called in non-atomic context. 27*4882a593Smuzhiyun * 28*4882a593Smuzhiyun * Returns 0 if successful, negative on failure. 29*4882a593Smuzhiyun */ 30*4882a593Smuzhiyun int mtk_smi_larb_get(struct device *larbdev); 31*4882a593Smuzhiyun void mtk_smi_larb_put(struct device *larbdev); 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #else 34*4882a593Smuzhiyun mtk_smi_larb_get(struct device * larbdev)35*4882a593Smuzhiyunstatic inline int mtk_smi_larb_get(struct device *larbdev) 36*4882a593Smuzhiyun { 37*4882a593Smuzhiyun return 0; 38*4882a593Smuzhiyun } 39*4882a593Smuzhiyun mtk_smi_larb_put(struct device * larbdev)40*4882a593Smuzhiyunstatic inline void mtk_smi_larb_put(struct device *larbdev) { } 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun #endif 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun #endif 45