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1168af40b1
Add support to the K3 R5F remoteproc driver to configure all the R5F cores to be either in IPC-only mode or the traditional remoteproc mode. The IPC-only mode expects that the remote processors are already booted by the bootloader, and only performs the minimum steps required to initialize and deinitialize the virtio IPC transports. The remoteproc mode allows the kernel remoteproc driver to do the regular load and boot and other device management operations for a R5F core. The IPC-only mode for a R5F core is detected and configured at driver probe time by querying the System Firmware for the R5F power and reset state and/or status and making sure that the R5F core is indeed started by the bootloaders, otherwise the device is configured for remoteproc mode. Support for IPC-only mode is achieved through .attach(), .detach() and .get_loaded_rsc_table() callback ops and zeroing out the regular rproc ops .prepare(), .unprepare(), .start() and .stop(). The resource table follows a design-by-contract approach and is expected to be at the base of the DDR firmware region reserved for each remoteproc, it is mostly expected to contain only the virtio device and trace resource entries. NOTE: The driver cannot configure a R5F core for remoteproc mode by any means without rebooting the kernel if that R5F core has been started by a bootloader. This is the current desired behavior and can be enhanced in the future if the feature is needed. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20220213201246.25952-4-s-anna@ti.com
Linux kernel
============
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