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Message-Id: <20230118121426.492864-16-cristian.marussi@arm.com>
Date: Wed, 18 Jan 2023 12:14:24 +0000
From: Cristian Marussi <cristian.marussi@....com>
To: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc: sudeep.holla@....com, james.quinlan@...adcom.com,
Jonathan.Cameron@...wei.com, f.fainelli@...il.com,
etienne.carriere@...aro.org, vincent.guittot@...aro.org,
souvik.chakravarty@....com, wleavitt@...vell.com,
peter.hilber@...nsynergy.com, nicola.mazzucato@....com,
tarek.el-sherbiny@....com, quic_kshivnan@...cinc.com,
cristian.marussi@....com
Subject: [PATCH v8 15/17] 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@....com>
---
v7 --> v8
- refactor RAw mode initialization
v5 --> v6
- fix error path for RAW mode in scmi_probe
- use new debugfs Raw rootdir
v4 --> v5
- rework to use multiple SCMI instances
v3 --> v4
- add call hooks to support polled transports
v1 --> v2
- fixes need to use multiple cinfo if available
---
drivers/firmware/arm_scmi/driver.c | 63 ++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index 2b96d9c3489d..ad4e53f0c342 100644
--- 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,
--
2.34.1
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