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 * 87 tegra_smmu_probe(struct device *dev, const struct tegra_smmu_soc *soc, 88 struct tegra_mc *mc) 89 { 90 return NULL; 91 } 92 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 * 104 tegra_gart_probe(struct device *dev, struct tegra_mc *mc) 105 { 106 return ERR_PTR(-ENODEV); 107 } 108 109 static inline int tegra_gart_suspend(struct gart_device *gart) 110 { 111 return -ENODEV; 112 } 113 114 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 int 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