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2#ifndef __IO_PGTABLE_H
3#define __IO_PGTABLE_H
4
5#include <linux/bitops.h>
6#include <linux/iommu.h>
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11enum io_pgtable_fmt {
12 ARM_32_LPAE_S1,
13 ARM_32_LPAE_S2,
14 ARM_64_LPAE_S1,
15 ARM_64_LPAE_S2,
16 ARM_V7S,
17 ARM_MALI_LPAE,
18 IO_PGTABLE_NUM_FMTS,
19};
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39struct iommu_flush_ops {
40 void (*tlb_flush_all)(void *cookie);
41 void (*tlb_flush_walk)(unsigned long iova, size_t size, size_t granule,
42 void *cookie);
43 void (*tlb_flush_leaf)(unsigned long iova, size_t size, size_t granule,
44 void *cookie);
45 void (*tlb_add_page)(struct iommu_iotlb_gather *gather,
46 unsigned long iova, size_t granule, void *cookie);
47};
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64struct io_pgtable_cfg {
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90 #define IO_PGTABLE_QUIRK_ARM_NS BIT(0)
91 #define IO_PGTABLE_QUIRK_NO_PERMS BIT(1)
92 #define IO_PGTABLE_QUIRK_TLBI_ON_MAP BIT(2)
93 #define IO_PGTABLE_QUIRK_ARM_MTK_EXT BIT(3)
94 #define IO_PGTABLE_QUIRK_NON_STRICT BIT(4)
95 #define IO_PGTABLE_QUIRK_ARM_TTBR1 BIT(5)
96 unsigned long quirks;
97 unsigned long pgsize_bitmap;
98 unsigned int ias;
99 unsigned int oas;
100 bool coherent_walk;
101 const struct iommu_flush_ops *tlb;
102 struct device *iommu_dev;
103
104
105 union {
106 struct {
107 u64 ttbr;
108 struct {
109 u32 ips:3;
110 u32 tg:2;
111 u32 sh:2;
112 u32 orgn:2;
113 u32 irgn:2;
114 u32 tsz:6;
115 } tcr;
116 u64 mair;
117 } arm_lpae_s1_cfg;
118
119 struct {
120 u64 vttbr;
121 struct {
122 u32 ps:3;
123 u32 tg:2;
124 u32 sh:2;
125 u32 orgn:2;
126 u32 irgn:2;
127 u32 sl:2;
128 u32 tsz:6;
129 } vtcr;
130 } arm_lpae_s2_cfg;
131
132 struct {
133 u32 ttbr;
134 u32 tcr;
135 u32 nmrr;
136 u32 prrr;
137 } arm_v7s_cfg;
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139 struct {
140 u64 transtab;
141 u64 memattr;
142 } arm_mali_lpae_cfg;
143 };
144};
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156struct io_pgtable_ops {
157 int (*map)(struct io_pgtable_ops *ops, unsigned long iova,
158 phys_addr_t paddr, size_t size, int prot, gfp_t gfp);
159 size_t (*unmap)(struct io_pgtable_ops *ops, unsigned long iova,
160 size_t size, struct iommu_iotlb_gather *gather);
161 phys_addr_t (*iova_to_phys)(struct io_pgtable_ops *ops,
162 unsigned long iova);
163};
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175struct io_pgtable_ops *alloc_io_pgtable_ops(enum io_pgtable_fmt fmt,
176 struct io_pgtable_cfg *cfg,
177 void *cookie);
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186void free_io_pgtable_ops(struct io_pgtable_ops *ops);
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202struct io_pgtable {
203 enum io_pgtable_fmt fmt;
204 void *cookie;
205 struct io_pgtable_cfg cfg;
206 struct io_pgtable_ops ops;
207};
208
209#define io_pgtable_ops_to_pgtable(x) container_of((x), struct io_pgtable, ops)
210
211static inline void io_pgtable_tlb_flush_all(struct io_pgtable *iop)
212{
213 iop->cfg.tlb->tlb_flush_all(iop->cookie);
214}
215
216static inline void
217io_pgtable_tlb_flush_walk(struct io_pgtable *iop, unsigned long iova,
218 size_t size, size_t granule)
219{
220 iop->cfg.tlb->tlb_flush_walk(iova, size, granule, iop->cookie);
221}
222
223static inline void
224io_pgtable_tlb_flush_leaf(struct io_pgtable *iop, unsigned long iova,
225 size_t size, size_t granule)
226{
227 iop->cfg.tlb->tlb_flush_leaf(iova, size, granule, iop->cookie);
228}
229
230static inline void
231io_pgtable_tlb_add_page(struct io_pgtable *iop,
232 struct iommu_iotlb_gather * gather, unsigned long iova,
233 size_t granule)
234{
235 if (iop->cfg.tlb->tlb_add_page)
236 iop->cfg.tlb->tlb_add_page(gather, iova, granule, iop->cookie);
237}
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246struct io_pgtable_init_fns {
247 struct io_pgtable *(*alloc)(struct io_pgtable_cfg *cfg, void *cookie);
248 void (*free)(struct io_pgtable *iop);
249};
250
251extern struct io_pgtable_init_fns io_pgtable_arm_32_lpae_s1_init_fns;
252extern struct io_pgtable_init_fns io_pgtable_arm_32_lpae_s2_init_fns;
253extern struct io_pgtable_init_fns io_pgtable_arm_64_lpae_s1_init_fns;
254extern struct io_pgtable_init_fns io_pgtable_arm_64_lpae_s2_init_fns;
255extern struct io_pgtable_init_fns io_pgtable_arm_v7s_init_fns;
256extern struct io_pgtable_init_fns io_pgtable_arm_mali_lpae_init_fns;
257
258#endif
259