2 * Rockchip - System MMU support
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #ifndef _ARM_MACH_RK_SYSMMU_H_
10 #define _ARM_MACH_RK_SYSMMU_H_
12 #include <linux/list.h>
13 #include <linux/atomic.h>
14 #include <linux/spinlock.h>
16 #define IEP_SYSMMU_COMPATIBLE_NAME "iommu,iep_mmu"
17 #define VIP_SYSMMU_COMPATIBLE_NAME "iommu,vip_mmu"
19 #define ISP_SYSMMU_COMPATIBLE_NAME "iommu,isp_mmu"
21 #define VOPB_SYSMMU_COMPATIBLE_NAME "iommu,vopb_mmu"
22 #define VOPL_SYSMMU_COMPATIBLE_NAME "iommu,vopl_mmu"
24 #define VOP_SYSMMU_COMPATIBLE_NAME "iommu,vop_mmu"
26 #define HEVC_SYSMMU_COMPATIBLE_NAME "iommu,hevc_mmu"
27 #define VPU_SYSMMU_COMPATIBLE_NAME "iommu,vpu_mmu"
30 enum rk_sysmmu_inttype {
37 struct sysmmu_drvdata;
39 * @itype: type of fault.
40 * @pgtable_base: the physical address of page table base. This is 0 if @itype
42 * @fault_addr: the device (virtual) address that the System MMU tried to
43 * translated. This is 0 if @itype is SYSMMU_BUSERROR.
45 typedef int (*sysmmu_fault_handler_t)(struct device *dev,
46 enum rk_sysmmu_inttype itype,
47 unsigned long pgtable_base,
48 unsigned long fault_addr,
52 #ifdef CONFIG_ROCKCHIP_IOMMU
54 * rockchip_sysmmu_enable() - enable system mmu
55 * @owner: The device whose System MMU is about to be enabled.
56 * @pgd: Base physical address of the 1st level page table
58 * This function enable system mmu to transfer address
59 * from virtual address to physical address.
60 * Return non-zero if it fails to enable System MMU.
62 int rockchip_sysmmu_enable(struct device *owner, unsigned long pgd);
65 * rockchip_sysmmu_disable() - disable sysmmu mmu of ip
66 * @owner: The device whose System MMU is about to be disabled.
68 * This function disable system mmu to transfer address
69 * from virtual address to physical address
71 bool rockchip_sysmmu_disable(struct device *owner);
74 * rockchip_sysmmu_tlb_invalidate() - flush all TLB entry in system mmu
75 * @owner: The device whose System MMU.
77 * This function flush all TLB entry in system mmu
79 void rockchip_sysmmu_tlb_invalidate(struct device *owner);
81 /** rockchip_sysmmu_set_fault_handler() - Fault handler for System MMUs
82 * Called when interrupt occurred by the System MMUs
83 * The device drivers of peripheral devices that has a System MMU can implement
84 * a fault handler to resolve address translation fault by System MMU.
85 * The meanings of return value and parameters are described below.
87 * return value: non-zero if the fault is correctly resolved.
88 * zero if the fault is not handled.
90 void rockchip_sysmmu_set_fault_handler(struct device *dev,sysmmu_fault_handler_t handler);
92 #else /* CONFIG_ROCKCHIP_IOMMU */
93 #define rockchip_sysmmu_enable(owner, pgd) do { } while (0)
94 #define rockchip_sysmmu_disable(owner) do { } while (0)
95 #define rockchip_sysmmu_tlb_invalidate(owner) do { } while (0)
96 #define rockchip_sysmmu_set_fault_handler(sysmmu, handler) do { } while (0)
99 #ifdef CONFIG_IOMMU_API
100 #include <linux/device.h>
101 static inline void platform_set_sysmmu(struct device *sysmmu, struct device *dev)
103 dev->archdata.iommu = sysmmu;
106 #define platform_set_sysmmu(dev, sysmmu) do { } while (0)
109 #endif /* _ARM_MACH_RK_SYSMMU_H_ */