1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2014 NVIDIA Corporation
4 */
5
6 #ifndef __SOC_TEGRA_MC_H__
7 #define __SOC_TEGRA_MC_H__
8
9 #include <linux/err.h>
10 #include <linux/reset-controller.h>
11 #include <linux/types.h>
12
13 struct clk;
14 struct device;
15 struct page;
16
17 struct tegra_smmu_enable {
18 unsigned int reg;
19 unsigned int bit;
20 };
21
22 struct tegra_mc_timing {
23 unsigned long rate;
24
25 u32 *emem_data;
26 };
27
28 /* latency allowance */
29 struct tegra_mc_la {
30 unsigned int reg;
31 unsigned int shift;
32 unsigned int mask;
33 unsigned int def;
34 };
35
36 struct tegra_mc_client {
37 unsigned int id;
38 const char *name;
39 unsigned int swgroup;
40
41 unsigned int fifo_size;
42
43 struct tegra_smmu_enable smmu;
44 struct tegra_mc_la la;
45 };
46
47 struct tegra_smmu_swgroup {
48 const char *name;
49 unsigned int swgroup;
50 unsigned int reg;
51 };
52
53 struct tegra_smmu_group_soc {
54 const char *name;
55 const unsigned int *swgroups;
56 unsigned int num_swgroups;
57 };
58
59 struct tegra_smmu_soc {
60 const struct tegra_mc_client *clients;
61 unsigned int num_clients;
62
63 const struct tegra_smmu_swgroup *swgroups;
64 unsigned int num_swgroups;
65
66 const struct tegra_smmu_group_soc *groups;
67 unsigned int num_groups;
68
69 bool supports_round_robin_arbitration;
70 bool supports_request_limit;
71
72 unsigned int num_tlb_lines;
73 unsigned int num_asids;
74 };
75
76 struct tegra_mc;
77 struct tegra_smmu;
78 struct gart_device;
79
80 #ifdef CONFIG_TEGRA_IOMMU_SMMU
81 struct tegra_smmu *tegra_smmu_probe(struct device *dev,
82 const struct tegra_smmu_soc *soc,
83 struct tegra_mc *mc);
84 void tegra_smmu_remove(struct tegra_smmu *smmu);
85 #else
86 static inline struct tegra_smmu *
tegra_smmu_probe(struct device * dev,const struct tegra_smmu_soc * soc,struct tegra_mc * mc)87 tegra_smmu_probe(struct device *dev, const struct tegra_smmu_soc *soc,
88 struct tegra_mc *mc)
89 {
90 return NULL;
91 }
92
tegra_smmu_remove(struct tegra_smmu * smmu)93 static inline void tegra_smmu_remove(struct tegra_smmu *smmu)
94 {
95 }
96 #endif
97
98 #ifdef CONFIG_TEGRA_IOMMU_GART
99 struct gart_device *tegra_gart_probe(struct device *dev, struct tegra_mc *mc);
100 int tegra_gart_suspend(struct gart_device *gart);
101 int tegra_gart_resume(struct gart_device *gart);
102 #else
103 static inline struct gart_device *
tegra_gart_probe(struct device * dev,struct tegra_mc * mc)104 tegra_gart_probe(struct device *dev, struct tegra_mc *mc)
105 {
106 return ERR_PTR(-ENODEV);
107 }
108
tegra_gart_suspend(struct gart_device * gart)109 static inline int tegra_gart_suspend(struct gart_device *gart)
110 {
111 return -ENODEV;
112 }
113
tegra_gart_resume(struct gart_device * gart)114 static inline int tegra_gart_resume(struct gart_device *gart)
115 {
116 return -ENODEV;
117 }
118 #endif
119
120 struct tegra_mc_reset {
121 const char *name;
122 unsigned long id;
123 unsigned int control;
124 unsigned int status;
125 unsigned int reset;
126 unsigned int bit;
127 };
128
129 struct tegra_mc_reset_ops {
130 int (*hotreset_assert)(struct tegra_mc *mc,
131 const struct tegra_mc_reset *rst);
132 int (*hotreset_deassert)(struct tegra_mc *mc,
133 const struct tegra_mc_reset *rst);
134 int (*block_dma)(struct tegra_mc *mc,
135 const struct tegra_mc_reset *rst);
136 bool (*dma_idling)(struct tegra_mc *mc,
137 const struct tegra_mc_reset *rst);
138 int (*unblock_dma)(struct tegra_mc *mc,
139 const struct tegra_mc_reset *rst);
140 int (*reset_status)(struct tegra_mc *mc,
141 const struct tegra_mc_reset *rst);
142 };
143
144 struct tegra_mc_soc {
145 const struct tegra_mc_client *clients;
146 unsigned int num_clients;
147
148 const unsigned long *emem_regs;
149 unsigned int num_emem_regs;
150
151 unsigned int num_address_bits;
152 unsigned int atom_size;
153
154 u8 client_id_mask;
155
156 const struct tegra_smmu_soc *smmu;
157
158 u32 intmask;
159
160 const struct tegra_mc_reset_ops *reset_ops;
161 const struct tegra_mc_reset *resets;
162 unsigned int num_resets;
163 };
164
165 struct tegra_mc {
166 struct device *dev;
167 struct tegra_smmu *smmu;
168 struct gart_device *gart;
169 void __iomem *regs;
170 struct clk *clk;
171 int irq;
172
173 const struct tegra_mc_soc *soc;
174 unsigned long tick;
175
176 struct tegra_mc_timing *timings;
177 unsigned int num_timings;
178
179 struct reset_controller_dev reset;
180
181 spinlock_t lock;
182 };
183
184 void tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate);
185 unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc);
186
187 #endif /* __SOC_TEGRA_MC_H__ */
188
