[PATCH 2/4] firmware: arm_scmi: Add support for type handling in common functions

Cristian Marussi
2021-05-25T02:57:07Z

Add SCMI type handling to pack/unpack_scmi_header common helper functions.

Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
Needed later in the series to support delegated xfers
---
drivers/firmware/arm_scmi/common.h | 6 +++++-
drivers/firmware/arm_scmi/driver.c | 1 +
2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index 228bf4a71d23..4bd43863c306 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -70,6 +70,7 @@ struct scmi_msg_resp_prot_version {
*
* @id: The identifier of the message being sent
* @protocol_id: The identifier of the protocol used to send @id message
+ * @type: The SCMI type for this message
* @seq: The token to identify the message. When a message returns, the
* platform returns the whole message header unmodified including the
* token
@@ -80,6 +81,7 @@ struct scmi_msg_resp_prot_version {
struct scmi_msg_hdr {
u8 id;
u8 protocol_id;
+ u8 type;
u16 seq;
u32 status;
bool poll_completion;
@@ -89,13 +91,14 @@ struct scmi_msg_hdr {
* pack_scmi_header() - packs and returns 32-bit header
*
* @hdr: pointer to header containing all the information on message id,
- * protocol id and sequence id.
+ * protocol id, sequence id and type.
*
* Return: 32-bit packed message header to be sent to the platform.
*/
static inline u32 pack_scmi_header(struct scmi_msg_hdr *hdr)
{
return FIELD_PREP(MSG_ID_MASK, hdr->id) |
+ FIELD_PREP(MSG_TYPE_MASK, hdr->type) |
FIELD_PREP(MSG_TOKEN_ID_MASK, hdr->seq) |
FIELD_PREP(MSG_PROTOCOL_ID_MASK, hdr->protocol_id);
}
@@ -110,6 +113,7 @@ static inline void unpack_scmi_header(u32 msg_hdr, struct scmi_msg_hdr *hdr)
{
hdr->id = MSG_XTRACT_ID(msg_hdr);
hdr->protocol_id = MSG_XTRACT_PROT_ID(msg_hdr);
+ hdr->type = MSG_XTRACT_TYPE(msg_hdr);
}

/**
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 75141b90ae53..b4c69141eca1 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -568,6 +568,7 @@ static int xfer_get_init(const struct scmi_protocol_handle *ph,

xfer->tx.len = tx_size;
xfer->rx.len = rx_size ? : info->desc->max_msg_size;
+ xfer->hdr.type = MSG_TYPE_COMMAND;
xfer->hdr.id = msg_id;
xfer->hdr.protocol_id = pi->proto->id;
xfer->hdr.poll_completion = false;
--
2.17.1