kernel/linux.git/include/soc/tegra/mc.h, branch v5.18.2

memory: tegra: Add compile-test stub for tegra_mc_probe_device()

2021-06-20T19:22:30+00:00

The tegra_mc_probe_device() symbol is only available when the TEGRA_MC Kconfig option is enabled. Provide a stub if that's not the case so that the driver can be compile-tested. Reported-by: kernel test robot Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20210618111846.1286166-1-thierry.reding@gmail.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Implement SID override programming

2021-06-03T19:50:43+00:00

Instead of programming all SID overrides during early boot, perform the operation on-demand after the SMMU translations have been set up for a device. This reuses data from device tree to match memory clients for a device and programs the SID specified in device tree, which corresponds to the SID used for the SMMU context banks for the device. Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20210603164632.1000458-2-thierry.reding@gmail.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Unify drivers

2021-06-03T19:49:41+00:00

The Tegra210 (and earlier) driver now supports all the functionality that the Tegra186 (and later) driver does, so they can be unified. Note that previously the Tegra186 (and later) driver could be unloaded, even if that was perhaps not very useful. Older chips don't support that yet, but once they do this code can be reenabled. Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20210602163302.120041-11-thierry.reding@gmail.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Parameterize interrupt handler

2021-06-03T19:49:41+00:00

Tegra20 requires a slightly different interrupt handler than Tegra30 and later, so parameterize the handler, so that each SoC implementation can provide its own. Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20210602163302.120041-8-thierry.reding@gmail.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Make per-SoC setup more generic

2021-06-03T19:49:41+00:00

The current per-SoC setup code runs at a fairly arbitrary point during probe, thereby making it less flexible for other SoC generations. Move the call around slightly (after only the very basic, common setup that applies to all SoC generations has been performed), which will allow it to be used for other implementations. Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20210602163302.120041-6-thierry.reding@gmail.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Push suspend/resume into SoC drivers

2021-06-03T19:49:41+00:00

Continuing the scheme of unification, push suspend/resume callbacks into per-SoC driver so that they can be properly parameterized. Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20210602163302.120041-5-thierry.reding@gmail.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Introduce struct tegra_mc_ops

2021-06-03T19:49:40+00:00

Subsequent patches will introduce further callbacks, so create a new struct tegra_mc_ops to collect all of them in a single place. Move the existing ->init() callback into the new structure. Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20210602163302.120041-4-thierry.reding@gmail.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Unify struct tegra_mc across SoC generations

2021-06-03T19:49:40+00:00

As another step towards unifying both the Tegra210 (and earlier) and Tegra186 (and later) memory controller drivers, unify the structures that are used to represent them. Note that this comes at a slight space penalty since some fields are not used on all generations, but the benefits of unifying the driver outweigh the downsides. Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20210602163302.120041-3-thierry.reding@gmail.com Signed-off-by: Krzysztof Kozlowski

memory: tegra: Consolidate register fields

2021-06-03T19:49:40+00:00

Subsequent patches will add more register fields to the tegra_mc_client structure, so consolidate all register field definitions into a common sub-structure for coherency. Signed-off-by: Thierry Reding Link: https://lore.kernel.org/r/20210602163302.120041-2-thierry.reding@gmail.com Signed-off-by: Krzysztof Kozlowski

memory: tegra20: Add debug statistics

2021-04-01T17:58:22+00:00

Add debug statistics collection support. The statistics is available via debugfs in '/sys/kernel/debug/mc/stats', it shows percent of memory controller utilization for each memory client. This information is intended to help with debugging of memory performance issues, it already was proven to be useful by helping to improve memory bandwidth management of the display driver. Signed-off-by: Dmitry Osipenko Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20210319130933.23261-1-digetx@gmail.com