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firmware: arm_scmi: Add a common helper to check if a message is supported

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A common helper is provided to check if a specific protocol message is
supported or not.

Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Link: https://lore.kernel.org/r/20240212123233.1230090-3-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Cristian Marussi 2024-02-12 12:32:24 +00:00 committed by Sudeep Holla
parent 8733e86a80
commit 637b6d6cae
2 changed files with 38 additions and 0 deletions
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34
drivers/firmware/arm_scmi/driver.c
View File

@ -1754,10 +1754,44 @@ static void scmi_common_fastchannel_db_ring(struct scmi_fc_db_info *db)
#endif
}
/**
* scmi_protocol_msg_check - Check protocol message attributes
*
* @ph: A reference to the protocol handle.
* @message_id: The ID of the message to check.
* @attributes: A parameter to optionally return the retrieved message
* attributes, in case of Success.
*
* An helper to check protocol message attributes for a specific protocol
* and message pair.
*
* Return: 0 on SUCCESS
*/
static int scmi_protocol_msg_check(const struct scmi_protocol_handle *ph,
u32 message_id, u32 *attributes)
{
int ret;
struct scmi_xfer *t;
ret = xfer_get_init(ph, PROTOCOL_MESSAGE_ATTRIBUTES,
sizeof(__le32), 0, &t);
if (ret)
return ret;
put_unaligned_le32(message_id, t->tx.buf);
ret = do_xfer(ph, t);
if (!ret && attributes)
*attributes = get_unaligned_le32(t->rx.buf);
xfer_put(ph, t);
return ret;
}
static const struct scmi_proto_helpers_ops helpers_ops = {
.extended_name_get = scmi_common_extended_name_get,
.iter_response_init = scmi_iterator_init,
.iter_response_run = scmi_iterator_run,
.protocol_msg_check = scmi_protocol_msg_check,
.fastchannel_init = scmi_common_fastchannel_init,
.fastchannel_db_ring = scmi_common_fastchannel_db_ring,
};

4
drivers/firmware/arm_scmi/protocols.h
View File

@ -251,6 +251,8 @@ struct scmi_fc_info {
* provided in @ops.
* @iter_response_run: A common helper to trigger the run of a previously
* initialized iterator.
* @protocol_msg_check: A common helper to check is a specific protocol message
* is supported.
* @fastchannel_init: A common helper used to initialize FC descriptors by
* gathering FC descriptions from the SCMI platform server.
* @fastchannel_db_ring: A common helper to ring a FC doorbell.
@ -264,6 +266,8 @@ struct scmi_proto_helpers_ops {
unsigned int max_resources, u8 msg_id,
size_t tx_size, void *priv);
int (*iter_response_run)(void *iter);
int (*protocol_msg_check)(const struct scmi_protocol_handle *ph,
u32 message_id, u32 *attributes);
void (*fastchannel_init)(const struct scmi_protocol_handle *ph,
u8 describe_id, u32 message_id,
u32 valid_size, u32 domain,