firmware: arm_scmi: Add new parameter to mark_txdone

Add a new xfer parameter to mark_txdone transport operation which enables
the SCMI core to optionally pass back into the transport layer a reference
to the xfer descriptor that is being handled.

Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Florian Fainelli <[e-mail]>
Signed-off-by: Cristian Marussi <[e-mail]>
Signed-off-by: Sudeep Holla <[e-mail]>

drivers/firmware/arm_scmi/common.h

···
 	unsigned int (*get_max_msg)(struct scmi_chan_info *base_cinfo);
 	int (*send_message)(struct scmi_chan_info *cinfo,
 			    struct scmi_xfer *xfer);
-	void (*mark_txdone)(struct scmi_chan_info *cinfo, int ret);
+	void (*mark_txdone)(struct scmi_chan_info *cinfo, int ret,
+			    struct scmi_xfer *xfer);
 	void (*fetch_response)(struct scmi_chan_info *cinfo,
 			       struct scmi_xfer *xfer);
 	void (*fetch_notification)(struct scmi_chan_info *cinfo,

drivers/firmware/arm_scmi/driver.c

···
 		ret = scmi_to_linux_errno(xfer->hdr.status);
 
 	if (info->desc->ops->mark_txdone)
-		info->desc->ops->mark_txdone(cinfo, ret);
+		info->desc->ops->mark_txdone(cinfo, ret, xfer);
 
 	trace_scmi_xfer_end(xfer->transfer_id, xfer->hdr.id,
 			    xfer->hdr.protocol_id, xfer->hdr.seq, ret);

drivers/firmware/arm_scmi/mailbox.c

···
 	return ret;
 }
 
-static void mailbox_mark_txdone(struct scmi_chan_info *cinfo, int ret)
+static void mailbox_mark_txdone(struct scmi_chan_info *cinfo, int ret,
+				struct scmi_xfer *__unused)
 {
 	struct scmi_mailbox *smbox = cinfo->transport_info;
 

drivers/firmware/arm_scmi/optee.c

···
 	shmem_fetch_response(shmem, xfer);
 }
 
-static void scmi_optee_mark_txdone(struct scmi_chan_info *cinfo, int ret)
+static void scmi_optee_mark_txdone(struct scmi_chan_info *cinfo, int ret,
+				   struct scmi_xfer *__unused)
 {
 	struct scmi_optee_channel *channel = cinfo->transport_info;
 

drivers/firmware/arm_scmi/smc.c

···
 	shmem_fetch_response(scmi_info->shmem, xfer);
 }
 
-static void smc_mark_txdone(struct scmi_chan_info *cinfo, int ret)
+static void smc_mark_txdone(struct scmi_chan_info *cinfo, int ret,
+			    struct scmi_xfer *__unused)
 {
 	struct scmi_smc *scmi_info = cinfo->transport_info;