From 0771d1d96e6439c00497a521f8d2c9803f7e07e2 Mon Sep 17 00:00:00 2001 From: Igor Skalkin 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 Signed-off-by: Peter Hilber Signed-off-by: Igor Skalkin Signed-off-by: Vasyl Vavrychuk --- 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);