kernel/linux.git/drivers/soc/apple/rtkit-internal.h, branch linux-7.0.y

soc: apple: rtkit: Implement OSLog buffers properly

2025-02-28T21:36:45+00:00

Apparently nobody can figure out where the old logic came from, but it seems like it has never been actually used on any supported firmware to this day. OSLog buffers were apparently never requested. But starting with 13.3, we actually need this implemented properly for MTP (and later AOP) to work, so let's actually do that. Signed-off-by: Hector Martin Reviewed-by: Alyssa Rosenzweig Link: https://lore.kernel.org/r/20250226-apple-soc-misc-v2-2-c3ec37f9021b@svenpeter.dev Signed-off-by: Sven Peter

soc: apple: rtkit: Port to the internal mailbox driver

2023-11-23T10:10:17+00:00

Now that we have a mailbox driver in drivers/soc/apple, port the RTKit code to it. This mostly just entails replacing calls through the mailbox subsystem with direct calls into the driver. Acked-by: Eric Curtin Acked-by: Neal Gompa Acked-by: Alyssa Rosenzweig Signed-off-by: Hector Martin

soc: apple: Add RTKit IPC library

2022-05-01T14:55:06+00:00

Apple SoCs such as the M1 come with multiple embedded co-processors running proprietary firmware. Communication with those is established over a simple mailbox using the RTKit IPC protocol. This cannot be implemented inside the mailbox subsystem since on top of communication over channels we also need support for starting, hibernating and resetting these co-processors. We also need to handle shared memory allocations differently depending on the co-processor and don't want to split that across multiple drivers. Reviewed-by: Arnd Bergmann Signed-off-by: Sven Peter