kernel/drivers/firmware/tegra/bpmp.c, branch linux-6.9.y

firmware: tegra: Add suspend hook and reset BPMP IPC early on resume

2023-10-13T12:20:27Z

Add suspend hook and a 'suspended' field in the 'struct tegra_bpmp' to mark if BPMP is suspended. Also, add a 'flags' field in the 'struct tegra_bpmp_message' whose 'TEGRA_BPMP_MESSAGE_RESET' bit can be set from the Tegra MC driver to signal that the reset of BPMP IPC channels is required before sending MRQ to the BPMP FW. Together both the fields allow us to handle any requests that might be sent too soon as they can cause hang during system resume. One case where we see BPMP requests being sent before the BPMP driver has resumed is the memory bandwidth requests which are triggered by onlining the CPUs during system resume. The CPUs are onlined before the BPMP has resumed and we need to reset the BPMP IPC channels to handle these requests. The additional check for 'flags' is done to avoid any un-intended BPMP IPC reset if the tegra_bpmp_transfer*() API gets called during suspend sequence after the BPMP driver is suspended. Fixes: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth") Co-developed-by: Thierry Reding Signed-off-by: Sumit Gupta Acked-by: Thierry Reding Signed-off-by: Thierry Reding

firmware: Explicitly include correct DT includes

2023-08-12T08:31:01Z

The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Acked-by: Dinh Nguyen Acked-by: Thierry Reding Signed-off-by: Rob Herring Acked-by: Sudeep Holla Link: https://lore.kernel.org/r/20230803-dt-header-cleanups-for-soc-v2-17-d8de2cc88bff@kernel.org Signed-off-by: Arnd Bergmann

firmware: tegra: bpmp: Add support for DRAM MRQ GSCs

2023-06-09T15:17:23Z

Implement support for DRAM MRQ GSCs. Signed-off-by: Peter De Schrijver [treding@nvidia.com: drop unnecessary discrimination enum] Signed-off-by: Thierry Reding

firmware: Use of_property_present() for testing DT property presence

2023-04-04T19:51:23Z

It is preferred to use typed property access functions (i.e. of_property_read_ functions) rather than low-level of_get_property/of_find_property functions for reading properties. As part of this, convert of_get_property/of_find_property calls to the recently added of_property_present() helper when we just want to test for presence of a property and nothing more. Signed-off-by: Rob Herring Acked-by: Sudeep Holla Signed-off-by: Thierry Reding

firmware: tegra: bpmp: Do not support big-endian

2022-10-24T13:18:23Z

The CPU and BPMP inter-processor communication code is only partially endian-aware, so it doesn't work properly when run on a big-endian CPU anyway. Running Tegra SoCs in big-endian mode has also never been supported, especially not on those with 64-bit ARM processors. If big-endian support ever becomes necessary this can be added back but will need additional fixes for completeness. Signed-off-by: Thierry Reding

firmware: tegra: bpmp: Use iosys-map helpers

2022-10-24T13:18:11Z

The shared memory used for inter-processor communication between the CPU and the BPMP can reside either in system memory or in I/O memory. Use the iosys-map helpers to abstract these differences away. Signed-off-by: Thierry Reding

firmware: tegra: bpmp: Do only aligned access to IPC memory area

2022-06-24T15:57:29Z

Use memcpy_toio and memcpy_fromio variants of memcpy to guarantee no unaligned access to IPC memory area. This is to allow the IPC memory to be mapped as Device memory to further suppress speculative reads from happening within the 64 kB memory area above the IPC memory when 64 kB memory pages are used. Signed-off-by: Timo Alho Signed-off-by: Mikko Perttunen Signed-off-by: Thierry Reding

firmware: tegra: bpmp: Fix Tegra234-only builds

2021-06-11T11:31:51Z

The tegra186_bpmp_ops symbol is used on Tegra234, so make sure it's available. Signed-off-by: Thierry Reding

firmware: tegra: Enable BPMP support on Tegra234

2020-09-18T13:57:04Z

Enable support for the BPMP on Tegra234 to avoid relying on Tegra194 being enabled to pull in the needed OF device ID table entry. On simulation platforms the BPMP hasn't booted up yet by the time we probe the BPMP driver and the BPMP hasn't had a chance to mark the doorbell as ringable by the CCPLEX. This corresponding check in the BPMP driver will therefore fail. Work around this by disabling the check on simulation platforms. Reviewed-by: Jon Hunter Signed-off-by: Thierry Reding

firmware: tegra: Use consistent return variable name

2020-07-14T15:57:18Z

Most functions in the BPMP driver use 'err' as the return variable name but there are a few places that use 'ret'. Let's use 'err' to be consistent. Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding