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From 0771d1d96e6439c00497a521f8d2c9803f7e07e2 Mon Sep 17 00:00:00 2001
From: Igor Skalkin <igor.skalkin@opensynergy.com>
Date: Thu, 5 Nov 2020 22:21:10 +0100
Subject: [PATCH] firmware: arm_scmi: Add per message transport data
The virtio transport in this patch series can be simplified by using the
scmi_xfer tx/rx buffers for data exchange with the virtio device, and
for saving the message state. But the virtio transport requires
prepending a transport-specific header. Also, for data exchange using
virtqueues, the tx and rx buffers should not overlap.
The first step to solve the aforementioned issues is to add a
transport-specific data pointer to scmi_xfer.
Co-developed-by: Peter Hilber <peter.hilber@opensynergy.com>
Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
Signed-off-by: Igor Skalkin <igor.skalkin@opensynergy.com>
Signed-off-by: Vasyl Vavrychuk <vasyl.vavrychuk@opensynergy.com>
---
drivers/firmware/arm_scmi/common.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h
index 9a8359ecd220..c998ec29018e 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -131,6 +131,7 @@ struct scmi_msg {
* buffer for the rx path as we use for the tx path.
* @done: command message transmit completion event
* @async_done: pointer to delayed response message received event completion
+ * @extra_data: Transport-specific private data pointer
*/
struct scmi_xfer {
int transfer_id;
@@ -139,6 +140,7 @@ struct scmi_xfer {
struct scmi_msg rx;
struct completion done;
struct completion *async_done;
+ void *extra_data;
};
void scmi_xfer_put(const struct scmi_handle *h, struct scmi_xfer *xfer);
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