@@ -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,
};
@@ -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,
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> --- drivers/firmware/arm_scmi/driver.c | 34 +++++++++++++++++++++++++++ drivers/firmware/arm_scmi/protocols.h | 4 ++++ 2 files changed, 38 insertions(+)