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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3d9dd6fdd2
The EMC driver needs to know the number of external memory devices and also needs to update the EMEM configuration based on the new rate of the memory bus. To know how to update the EMEM config, looks up the values of the burst regs in the DT, for a given timing. Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
120 lines
2.3 KiB
C
120 lines
2.3 KiB
C
/*
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* Copyright (C) 2014 NVIDIA Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __SOC_TEGRA_MC_H__
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#define __SOC_TEGRA_MC_H__
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#include <linux/types.h>
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struct clk;
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struct device;
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struct page;
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struct tegra_smmu_enable {
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unsigned int reg;
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unsigned int bit;
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};
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struct tegra_mc_timing {
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unsigned long rate;
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u32 *emem_data;
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};
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/* latency allowance */
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struct tegra_mc_la {
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unsigned int reg;
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unsigned int shift;
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unsigned int mask;
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unsigned int def;
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};
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struct tegra_mc_client {
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unsigned int id;
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const char *name;
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unsigned int swgroup;
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unsigned int fifo_size;
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struct tegra_smmu_enable smmu;
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struct tegra_mc_la la;
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};
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struct tegra_smmu_swgroup {
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unsigned int swgroup;
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unsigned int reg;
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};
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struct tegra_smmu_ops {
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void (*flush_dcache)(struct page *page, unsigned long offset,
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size_t size);
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};
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struct tegra_smmu_soc {
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const struct tegra_mc_client *clients;
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unsigned int num_clients;
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const struct tegra_smmu_swgroup *swgroups;
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unsigned int num_swgroups;
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bool supports_round_robin_arbitration;
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bool supports_request_limit;
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unsigned int num_asids;
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const struct tegra_smmu_ops *ops;
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};
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struct tegra_mc;
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struct tegra_smmu;
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#ifdef CONFIG_TEGRA_IOMMU_SMMU
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struct tegra_smmu *tegra_smmu_probe(struct device *dev,
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const struct tegra_smmu_soc *soc,
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struct tegra_mc *mc);
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#else
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static inline struct tegra_smmu *
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tegra_smmu_probe(struct device *dev, const struct tegra_smmu_soc *soc,
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struct tegra_mc *mc)
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{
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return NULL;
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}
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#endif
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struct tegra_mc_soc {
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const struct tegra_mc_client *clients;
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unsigned int num_clients;
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const unsigned long *emem_regs;
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unsigned int num_emem_regs;
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unsigned int num_address_bits;
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unsigned int atom_size;
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const struct tegra_smmu_soc *smmu;
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};
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struct tegra_mc {
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struct device *dev;
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struct tegra_smmu *smmu;
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void __iomem *regs;
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struct clk *clk;
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int irq;
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const struct tegra_mc_soc *soc;
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unsigned long tick;
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struct tegra_mc_timing *timings;
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unsigned int num_timings;
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};
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void tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate);
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unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc);
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#endif /* __SOC_TEGRA_MC_H__ */
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