firmware: arm_ffa: Add support for FFA_MSG_SEND2

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The FFA_MSG_SEND2 can be  used to transmit a partition message from
the Tx buffer of the sender(the driver in this case) endpoint to the Rx
buffer of the receiver endpoint.

An invocation of the FFA_MSG_SEND2 transfers the ownership of the Tx
buffer to the receiver endpoint(or any intermediate consumer). Completion
of an FFA_MSG_SEND2 invocation transfers the ownership of the buffer
back to the sender endpoint.

The framework defines the FFA_MSG_SEND2 interface to transmit a partition
message from the Tx buffer of the sender to the Rx buffer of a receiver
and inform the scheduler that the receiver must be run.

Link: https://lore.kernel.org/r/20240417090931.2866487-1-sudeep.holla@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

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Sudeep Holla 2024-04-17 10:09:31 +01:00

parent 3c258bf6bf

commit 02c19d84c7

2 changed files with 47 additions and 0 deletions

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38

drivers/firmware/arm_ffa/driver.c

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9

include/linux/arm_ffa.h

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