1 /*
2  * Copyright (C) 2014 NVIDIA Corporation
3  *
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.
7  */
8 
9 #ifndef __SOC_TEGRA_MC_H__
10 #define __SOC_TEGRA_MC_H__
11 
12 #include <linux/types.h>
13 
14 struct clk;
15 struct device;
16 struct page;
17 
18 struct tegra_smmu_enable {
19 	unsigned int reg;
20 	unsigned int bit;
21 };
22 
23 /* latency allowance */
24 struct tegra_mc_la {
25 	unsigned int reg;
26 	unsigned int shift;
27 	unsigned int mask;
28 	unsigned int def;
29 };
30 
31 struct tegra_mc_client {
32 	unsigned int id;
33 	const char *name;
34 	unsigned int swgroup;
35 
36 	unsigned int fifo_size;
37 
38 	struct tegra_smmu_enable smmu;
39 	struct tegra_mc_la la;
40 };
41 
42 struct tegra_smmu_swgroup {
43 	unsigned int swgroup;
44 	unsigned int reg;
45 };
46 
47 struct tegra_smmu_ops {
48 	void (*flush_dcache)(struct page *page, unsigned long offset,
49 			     size_t size);
50 };
51 
52 struct tegra_smmu_soc {
53 	const struct tegra_mc_client *clients;
54 	unsigned int num_clients;
55 
56 	const struct tegra_smmu_swgroup *swgroups;
57 	unsigned int num_swgroups;
58 
59 	bool supports_round_robin_arbitration;
60 	bool supports_request_limit;
61 
62 	unsigned int num_tlb_lines;
63 	unsigned int num_asids;
64 
65 	const struct tegra_smmu_ops *ops;
66 };
67 
68 struct tegra_mc;
69 struct tegra_smmu;
70 
71 #ifdef CONFIG_TEGRA_IOMMU_SMMU
72 struct tegra_smmu *tegra_smmu_probe(struct device *dev,
73 				    const struct tegra_smmu_soc *soc,
74 				    struct tegra_mc *mc);
75 #else
76 static inline struct tegra_smmu *
tegra_smmu_probe(struct device * dev,const struct tegra_smmu_soc * soc,struct tegra_mc * mc)77 tegra_smmu_probe(struct device *dev, const struct tegra_smmu_soc *soc,
78 		 struct tegra_mc *mc)
79 {
80 	return NULL;
81 }
82 #endif
83 
84 struct tegra_mc_soc {
85 	const struct tegra_mc_client *clients;
86 	unsigned int num_clients;
87 
88 	const unsigned int *emem_regs;
89 	unsigned int num_emem_regs;
90 
91 	unsigned int num_address_bits;
92 	unsigned int atom_size;
93 
94 	const struct tegra_smmu_soc *smmu;
95 };
96 
97 struct tegra_mc {
98 	struct device *dev;
99 	struct tegra_smmu *smmu;
100 	void __iomem *regs;
101 	struct clk *clk;
102 	int irq;
103 
104 	const struct tegra_mc_soc *soc;
105 	unsigned long tick;
106 };
107 
108 #endif /* __SOC_TEGRA_MC_H__ */
109