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| author | Peter Hilber <peter.hilber@opensynergy.com> | 2021-08-03 16:10:20 +0300 |
|---|---|---|
| committer | Sudeep Holla <sudeep.holla@arm.com> | 2021-08-05 12:23:23 +0300 |
| commit | f301bba0ca7392d16a6ea4f1d264a91f1fadea1a (patch) | |
| tree | 292ea6e3ac501dab4bb5541b6baada984c101dc1 /drivers/firmware/arm_scmi/common.h | |
| parent | c92c3e382ebd2382b26a41e312a266a40c4fb05c (diff) | |
| download | linux-f301bba0ca7392d16a6ea4f1d264a91f1fadea1a.tar.xz | |
firmware: arm_scmi: Add message passing abstractions for transports
Add abstractions for future transports using message passing, such as
virtio. Derive the abstractions from the shared memory abstractions.
Abstract the transport SDU through the opaque struct scmi_msg_payld.
Also enable the transport to determine all other required information
about the transport SDU.
Link: https://lore.kernel.org/r/20210803131024.40280-12-cristian.marussi@arm.com
Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
[ Cristian: Adapted to new SCMI Kconfig layout, updated Copyrights ]
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scmi/common.h')
| -rw-r--r-- | drivers/firmware/arm_scmi/common.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h index 6320345865e8..4da6cecc0a1c 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -432,6 +432,21 @@ void shmem_clear_channel(struct scmi_shared_mem __iomem *shmem); bool shmem_poll_done(struct scmi_shared_mem __iomem *shmem, struct scmi_xfer *xfer); +/* declarations for message passing transports */ +struct scmi_msg_payld; + +/* Maximum overhead of message w.r.t. struct scmi_desc.max_msg_size */ +#define SCMI_MSG_MAX_PROT_OVERHEAD (2 * sizeof(__le32)) + +size_t msg_response_size(struct scmi_xfer *xfer); +size_t msg_command_size(struct scmi_xfer *xfer); +void msg_tx_prepare(struct scmi_msg_payld *msg, struct scmi_xfer *xfer); +u32 msg_read_header(struct scmi_msg_payld *msg); +void msg_fetch_response(struct scmi_msg_payld *msg, size_t len, + struct scmi_xfer *xfer); +void msg_fetch_notification(struct scmi_msg_payld *msg, size_t len, + size_t max_len, struct scmi_xfer *xfer); + void scmi_notification_instance_data_set(const struct scmi_handle *handle, void *priv); void *scmi_notification_instance_data_get(const struct scmi_handle *handle); |