firmware: arm_scmi: Call raw mode hooks from the core stack

Add a few call sites where, if SCMI raw mode access had been enabled in
Kconfig, the needed SCMI raw initialization and hooks are called.

Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230118121426.492864-16-cristian.marussi@arm.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 2b96d9c..ad4e53f 100644 (file)
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -37,6 +37,8 @@
 #include "common.h"
 #include "notify.h"
 
+#include "raw_mode.h"
+
 #define CREATE_TRACE_POINTS
 #include <trace/events/scmi.h>
 
@@ -150,6 +152,7 @@ struct scmi_debug_info {
  *             bus
  * @devreq_mtx: A mutex to serialize device creation for this SCMI instance
  * @dbg: A pointer to debugfs related data (if any)
+ * @raw: An opaque reference handle used by SCMI Raw mode.
  */
 struct scmi_info {
        int id;
@@ -175,6 +178,7 @@ struct scmi_info {
        /* Serialize device creation process for this instance */
        struct mutex devreq_mtx;
        struct scmi_debug_info *dbg;
+       void *raw;
 };
 
 #define handle_to_scmi_info(h) container_of(h, struct scmi_info, handle)
@@ -890,6 +894,11 @@ static void scmi_handle_notification(struct scmi_chan_info *cinfo,
                           xfer->hdr.protocol_id, xfer->hdr.seq,
                           MSG_TYPE_NOTIFICATION);
 
+       if (IS_ENABLED(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT)) {
+               xfer->hdr.seq = MSG_XTRACT_TOKEN(msg_hdr);
+               scmi_raw_message_report(info->raw, xfer, SCMI_RAW_NOTIF_QUEUE);
+       }
+
        __scmi_xfer_put(minfo, xfer);
 
        scmi_clear_channel(info, cinfo);
@@ -903,6 +912,9 @@ static void scmi_handle_response(struct scmi_chan_info *cinfo,
 
        xfer = scmi_xfer_command_acquire(cinfo, msg_hdr);
        if (IS_ERR(xfer)) {
+               if (IS_ENABLED(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT))
+                       scmi_raw_error_report(info->raw, cinfo, msg_hdr, priv);
+
                if (MSG_XTRACT_TYPE(msg_hdr) == MSG_TYPE_DELAYED_RESP)
                        scmi_clear_channel(info, cinfo);
                return;
@@ -936,6 +948,16 @@ static void scmi_handle_response(struct scmi_chan_info *cinfo,
                complete(&xfer->done);
        }
 
+       if (IS_ENABLED(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT)) {
+               /*
+                * When in polling mode avoid to queue the Raw xfer on the IRQ
+                * RX path since it will be already queued at the end of the TX
+                * poll loop.
+                */
+               if (!xfer->hdr.poll_completion)
+                       scmi_raw_message_report(info->raw, xfer, SCMI_RAW_REPLY_QUEUE);
+       }
+
        scmi_xfer_command_release(info, xfer);
 }
 
@@ -1050,6 +1072,14 @@ static int scmi_wait_for_reply(struct device *dev, const struct scmi_desc *desc,
                                            "RESP" : "resp",
                                            xfer->hdr.seq, xfer->hdr.status,
                                            xfer->rx.buf, xfer->rx.len);
+
+                       if (IS_ENABLED(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT)) {
+                               struct scmi_info *info =
+                                       handle_to_scmi_info(cinfo->handle);
+
+                               scmi_raw_message_report(info->raw, xfer,
+                                                       SCMI_RAW_REPLY_QUEUE);
+                       }
                }
        } else {
                /* And we wait for the response. */
@@ -2576,6 +2606,26 @@ static struct scmi_debug_info *scmi_debugfs_common_setup(struct scmi_info *info)
        return dbg;
 }
 
+static int scmi_debugfs_raw_mode_setup(struct scmi_info *info)
+{
+       int ret = 0;
+
+       if (!info->dbg)
+               return -EINVAL;
+
+       info->raw = scmi_raw_mode_init(&info->handle, info->dbg->top_dentry,
+                                      info->id, info->desc,
+                                      info->tx_minfo.max_msg);
+
+       if (IS_ERR(info->raw)) {
+               dev_err(info->dev, "Failed to initialize SCMI RAW Mode !\n");
+               ret = PTR_ERR(info->raw);
+               info->raw = NULL;
+       }
+
+       return ret;
+}
+
 static int scmi_probe(struct platform_device *pdev)
 {
        int ret;
@@ -2654,6 +2704,14 @@ static int scmi_probe(struct platform_device *pdev)
                info->dbg = scmi_debugfs_common_setup(info);
                if (!info->dbg)
                        dev_warn(dev, "Failed to setup SCMI debugfs.\n");
+
+               if (IS_ENABLED(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT)) {
+                       ret = scmi_debugfs_raw_mode_setup(info);
+                       if (ret)
+                               goto clear_dev_req_notifier;
+
+                       return 0;
+               }
        }
 
        if (scmi_notification_init(handle))
@@ -2713,6 +2771,8 @@ static int scmi_probe(struct platform_device *pdev)
        return 0;
 
 notification_exit:
+       if (IS_ENABLED(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT))
+               scmi_raw_mode_cleanup(info->raw);
        scmi_notification_exit(&info->handle);
 clear_dev_req_notifier:
        blocking_notifier_chain_unregister(&scmi_requested_devices_nh,
@@ -2732,6 +2792,9 @@ static int scmi_remove(struct platform_device *pdev)
        struct scmi_info *info = platform_get_drvdata(pdev);
        struct device_node *child;
 
+       if (IS_ENABLED(CONFIG_ARM_SCMI_RAW_MODE_SUPPORT))
+               scmi_raw_mode_cleanup(info->raw);
+
        mutex_lock(&scmi_list_mutex);
        if (info->users)
                dev_warn(&pdev->dev,