diff options
| author | Cristian Marussi <cristian.marussi@arm.com> | 2024-02-12 12:32:24 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-06 11:00:16 +0200 |
| commit | 67a50f5721787f3372085634a028311f8cd83713 (patch) | |
| tree | ed7979e5b88f318edb2daddee200cbd68ef17539 | |
| parent | 6f27bbf3de0d26090c298a58fcd9bb99f941ea07 (diff) | |
firmware: arm_scmi: Add a common helper to check if a message is supported
commit 637b6d6cae9c42db5a9525da67c991294924d2cd upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/firmware/arm_scmi/driver.c | 34 | ||||
| -rw-r--r-- | drivers/firmware/arm_scmi/protocols.h | 4 |
2 files changed, 38 insertions, 0 deletions
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 65d1e66a347d..24babf87adb9 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -1820,10 +1820,44 @@ 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, }; diff --git a/drivers/firmware/arm_scmi/protocols.h b/drivers/firmware/arm_scmi/protocols.h index 78e1a01eb656..9fc2f1e293d4 100644 --- a/drivers/firmware/arm_scmi/protocols.h +++ b/drivers/firmware/arm_scmi/protocols.h @@ -250,6 +250,8 @@ 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. @@ -262,6 +264,8 @@ 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, |