include/soc/tegra/mc.h

   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__ */