diff options
| author | Mikko Perttunen <mperttunen@nvidia.com> | 2022-09-20 11:11:56 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2022-11-25 18:14:58 +0300 |
| commit | 7946920d402d9a4b5bf53c3adc3783105dbf3966 (patch) | |
| tree | 44c2ba374f822cc8d353c541b8fbcb158e439ade /drivers/memory/tegra | |
| parent | 17c2984492c4b4fb130c50c85d48d382cbb9471f (diff) | |
| download | linux-7946920d402d9a4b5bf53c3adc3783105dbf3966.tar.xz | |
memory: tegra: Add API for retrieving carveout bounds
On Tegra234 NVDEC firmware is loaded from a secure carveout, where it
has been loaded by a bootloader. When booting NVDEC, we need to tell it
the address of this firmware, which we can determine by checking the
starting address of the carveout. As such, add an MC API to query the
bounds of carveouts, and add related information on Tegra234.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/memory/tegra')
| -rw-r--r-- | drivers/memory/tegra/mc.c | 25 | ||||
| -rw-r--r-- | drivers/memory/tegra/tegra234.c | 5 |
2 files changed, 30 insertions, 0 deletions
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index 2f7a58a9df1a..592907546ee6 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -107,6 +107,31 @@ int tegra_mc_probe_device(struct tegra_mc *mc, struct device *dev) } EXPORT_SYMBOL_GPL(tegra_mc_probe_device); +int tegra_mc_get_carveout_info(struct tegra_mc *mc, unsigned int id, + phys_addr_t *base, u64 *size) +{ + u32 offset; + + if (id < 1 || id >= mc->soc->num_carveouts) + return -EINVAL; + + if (id < 6) + offset = 0xc0c + 0x50 * (id - 1); + else + offset = 0x2004 + 0x50 * (id - 6); + + *base = mc_ch_readl(mc, MC_BROADCAST_CHANNEL, offset + 0x0); +#ifdef CONFIG_PHYS_ADDR_T_64BIT + *base |= (phys_addr_t)mc_ch_readl(mc, MC_BROADCAST_CHANNEL, offset + 0x4) << 32; +#endif + + if (size) + *size = mc_ch_readl(mc, MC_BROADCAST_CHANNEL, offset + 0x8) << 17; + + return 0; +} +EXPORT_SYMBOL_GPL(tegra_mc_get_carveout_info); + static int tegra_mc_block_dma_common(struct tegra_mc *mc, const struct tegra_mc_reset *rst) { diff --git a/drivers/memory/tegra/tegra234.c b/drivers/memory/tegra/tegra234.c index a9e8fd99730f..74d291d66366 100644 --- a/drivers/memory/tegra/tegra234.c +++ b/drivers/memory/tegra/tegra234.c @@ -187,4 +187,9 @@ const struct tegra_mc_soc tegra234_mc_soc = { .ops = &tegra186_mc_ops, .ch_intmask = 0x0000ff00, .global_intstatus_channel_shift = 8, + /* + * Additionally, there are lite carveouts but those are not currently + * supported. + */ + .num_carveouts = 32, }; |