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 HEVC_SYSMMU_COMPATIBLE_NAME "iommu,hevc_mmu"
25 #define VPU_SYSMMU_COMPATIBLE_NAME "iommu,vpu_mmu"
28 enum rk_sysmmu_inttype {
35 struct sysmmu_drvdata;
37 * @itype: type of fault.
38 * @pgtable_base: the physical address of page table base. This is 0 if @itype
40 * @fault_addr: the device (virtual) address that the System MMU tried to
41 * translated. This is 0 if @itype is SYSMMU_BUSERROR.
43 typedef int (*sysmmu_fault_handler_t)(struct device *dev,
44 enum rk_sysmmu_inttype itype,
45 unsigned long pgtable_base,
46 unsigned long fault_addr,
49 #ifdef CONFIG_ROCKCHIP_IOMMU
51 * rockchip_sysmmu_enable() - enable system mmu
52 * @owner: The device whose System MMU is about to be enabled.
53 * @pgd: Base physical address of the 1st level page table
55 * This function enable system mmu to transfer address
56 * from virtual address to physical address.
57 * Return non-zero if it fails to enable System MMU.
59 int rockchip_sysmmu_enable(struct device *owner, unsigned long pgd);
62 * rockchip_sysmmu_disable() - disable sysmmu mmu of ip
63 * @owner: The device whose System MMU is about to be disabled.
65 * This function disable system mmu to transfer address
66 * from virtual address to physical address
68 bool rockchip_sysmmu_disable(struct device *owner);
71 * rockchip_sysmmu_tlb_invalidate() - flush all TLB entry in system mmu
72 * @owner: The device whose System MMU.
74 * This function flush all TLB entry in system mmu
76 void rockchip_sysmmu_tlb_invalidate(struct device *owner);
78 /** rockchip_sysmmu_set_fault_handler() - Fault handler for System MMUs
79 * Called when interrupt occurred by the System MMUs
80 * The device drivers of peripheral devices that has a System MMU can implement
81 * a fault handler to resolve address translation fault by System MMU.
82 * The meanings of return value and parameters are described below.
84 * return value: non-zero if the fault is correctly resolved.
85 * zero if the fault is not handled.
87 void rockchip_sysmmu_set_fault_handler(struct device *dev,sysmmu_fault_handler_t handler);
89 /** rockchip_sysmmu_set_prefbuf() - Initialize prefetch buffers of System MMU v3
90 * @owner: The device which need to set the prefetch buffers
91 * @base0: The start virtual address of the area of the @owner device that the
92 * first prefetch buffer loads translation descriptors
93 * @size0: The last virtual address of the area of the @owner device that the
94 * first prefetch buffer loads translation descriptors.
95 * @base1: The start virtual address of the area of the @owner device that the
96 * second prefetch buffer loads translation descriptors. This will be
97 * ignored if @size1 is 0 and this function assigns the 2 prefetch
98 * buffers with each half of the area specified by @base0 and @size0
99 * @size1: The last virtual address of the area of the @owner device that the
100 * prefetch buffer loads translation descriptors. This can be 0. See
101 * the description of @base1 for more information with @size1 = 0
103 void rockchip_sysmmu_set_prefbuf(struct device *owner,
104 unsigned long base0, unsigned long size0,
105 unsigned long base1, unsigned long size1);
106 #else /* CONFIG_ROCKCHIP_IOMMU */
107 static inline int rockchip_sysmmu_enable(struct device *owner, unsigned long pgd)
111 static inline bool rockchip_sysmmu_disable(struct device *owner)
115 static inline void rockchip_sysmmu_tlb_invalidate(struct device *owner)
118 static inline void rockchip_sysmmu_set_fault_handler(struct device *dev,sysmmu_fault_handler_t handler)
121 static inline void rockchip_sysmmu_set_prefbuf(struct device *owner,
122 unsigned long base0, unsigned long size0,
123 unsigned long base1, unsigned long size1)
128 #ifdef CONFIG_IOMMU_API
129 #include <linux/device.h>
130 static inline void platform_set_sysmmu(struct device *sysmmu, struct device *dev)
132 dev->archdata.iommu = sysmmu;
135 static inline void platform_set_sysmmu(struct device *sysmmu, struct device *dev)
140 #endif /* _ARM_MACH_RK_SYSMMU_H_ */