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35f93203 |
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11-Dec-2023 |
Cristian Marussi <cristian.marussi@arm.com> |
scmi: Introduce a new SCMI API and port CLK SCMI driver to it Expose new scmi_buf_get/put API methods to build and send messages; command request descriptors are now pre-allocated when the SCMI core is initialized and kept in a free list, instead of being allocated on the stack of the caller of the SCMI request. Dynamically allocated descriptors enable the SCMI core to keep around and track outstanding transactions for as long as needed, outliving the lifetime of the caller stack: this allows tracking of late or missing replies and it will be needed when adding support for SCMI transports that allows for more messages to be inflight concurrently. Move the existing CLK SCMI driver to the new API. Reviewed by: andrew Tested on: Arm Morello Board Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D43046
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3595f18f |
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07-Dec-2023 |
Cristian Marussi <cristian.marussi@arm.com> |
scmi: Add SCMI message tracking and centralize tx/rx logic In order to be able to support also new, more parallel, SCMI transports that by nature can allow multiple concurrent commands to be in-flight, pending a reply, we must be able to use the sequence number provided in the SCMI messages to track the message status, matching commands and replies while keeping track of timeouts and duplicates. Add the needed message tracking machinery in the core SCMI stack and move the residual common tx/rx logic from the specific transports to the core SCMI stack, while adding one more interface to let the transports customize ther behaviour. Reviewed by: andrew Tested on: Arm Morello Board Sponsored by: Arm Ltd Differential Revision: https://reviews.freebsd.org/D43045
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