On Mon, Jun 14, 2021 at 03:10:36PM +0100, Jonathan Cameron wrote:

On Fri, 11 Jun 2021 17:59:33 +0100
Cristian Marussi [off-list ref] wrote:

quoted

From: Peter Hilber <redacted>

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.

Signed-off-by: Peter Hilber <redacted>
---

...

quoted

diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index b783ae058c8a..fa4075336580 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h

@@ -410,6 +410,21 @@ 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 */

Doesn't look to be kernel-doc..

Right, I'll fix.

Cristian

quoted

+#define SCMI_MSG_MAX_PROT_OVERHEAD (2 * sizeof(__le32))

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