From 297b60346df8beafee954a0fd7c2d64f33f3b9bc Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 01:44:05 +0000
Subject: [PATCH] rtl8211F_led_control
---
kernel/drivers/remoteproc/remoteproc_sysfs.c | 192 +++++++++++++++++++++++++++++++++++++----------
1 files changed, 151 insertions(+), 41 deletions(-)
diff --git a/kernel/drivers/remoteproc/remoteproc_sysfs.c b/kernel/drivers/remoteproc/remoteproc_sysfs.c
index 3a4c3d7..60e2be0 100644
--- a/kernel/drivers/remoteproc/remoteproc_sysfs.c
+++ b/kernel/drivers/remoteproc/remoteproc_sysfs.c
@@ -1,29 +1,154 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Remote Processor Framework
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
#include <linux/remoteproc.h>
+#include <linux/slab.h>
+#include <trace/hooks/remoteproc.h>
#include "remoteproc_internal.h"
#define to_rproc(d) container_of(d, struct rproc, dev)
+
+static ssize_t recovery_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rproc *rproc = to_rproc(dev);
+
+ return sprintf(buf, "%s", rproc->recovery_disabled ? "disabled\n" : "enabled\n");
+}
+
+/*
+ * By writing to the 'recovery' sysfs entry, we control the behavior of the
+ * recovery mechanism dynamically. The default value of this entry is "enabled".
+ *
+ * The 'recovery' sysfs entry supports these commands:
+ *
+ * enabled: When enabled, the remote processor will be automatically
+ * recovered whenever it crashes. Moreover, if the remote
+ * processor crashes while recovery is disabled, it will
+ * be automatically recovered too as soon as recovery is enabled.
+ *
+ * disabled: When disabled, a remote processor will remain in a crashed
+ * state if it crashes. This is useful for debugging purposes;
+ * without it, debugging a crash is substantially harder.
+ *
+ * recover: This function will trigger an immediate recovery if the
+ * remote processor is in a crashed state, without changing
+ * or checking the recovery state (enabled/disabled).
+ * This is useful during debugging sessions, when one expects
+ * additional crashes to happen after enabling recovery. In this
+ * case, enabling recovery will make it hard to debug subsequent
+ * crashes, so it's recommended to keep recovery disabled, and
+ * instead use the "recover" command as needed.
+ */
+static ssize_t recovery_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct rproc *rproc = to_rproc(dev);
+
+ if (sysfs_streq(buf, "enabled")) {
+ /* change the flag and begin the recovery process if needed */
+ rproc->recovery_disabled = false;
+ trace_android_vh_rproc_recovery_set(rproc);
+ rproc_trigger_recovery(rproc);
+ } else if (sysfs_streq(buf, "disabled")) {
+ rproc->recovery_disabled = true;
+ trace_android_vh_rproc_recovery_set(rproc);
+ } else if (sysfs_streq(buf, "recover")) {
+ /* begin the recovery process without changing the flag */
+ rproc_trigger_recovery(rproc);
+ } else {
+ return -EINVAL;
+ }
+
+ return count;
+}
+static DEVICE_ATTR_RW(recovery);
+
+/*
+ * A coredump-configuration-to-string lookup table, for exposing a
+ * human readable configuration via sysfs. Always keep in sync with
+ * enum rproc_coredump_mechanism
+ */
+static const char * const rproc_coredump_str[] = {
+ [RPROC_COREDUMP_DISABLED] = "disabled",
+ [RPROC_COREDUMP_ENABLED] = "enabled",
+ [RPROC_COREDUMP_INLINE] = "inline",
+};
+
+/* Expose the current coredump configuration via debugfs */
+static ssize_t coredump_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rproc *rproc = to_rproc(dev);
+
+ return sprintf(buf, "%s\n", rproc_coredump_str[rproc->dump_conf]);
+}
+
+/*
+ * By writing to the 'coredump' sysfs entry, we control the behavior of the
+ * coredump mechanism dynamically. The default value of this entry is "default".
+ *
+ * The 'coredump' sysfs entry supports these commands:
+ *
+ * disabled: This is the default coredump mechanism. Recovery will proceed
+ * without collecting any dump.
+ *
+ * default: When the remoteproc crashes the entire coredump will be
+ * copied to a separate buffer and exposed to userspace.
+ *
+ * inline: The coredump will not be copied to a separate buffer and the
+ * recovery process will have to wait until data is read by
+ * userspace. But this avoid usage of extra memory.
+ */
+static ssize_t coredump_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct rproc *rproc = to_rproc(dev);
+
+ if (rproc->state == RPROC_CRASHED) {
+ dev_err(&rproc->dev, "can't change coredump configuration\n");
+ return -EBUSY;
+ }
+
+ if (sysfs_streq(buf, "disabled")) {
+ rproc->dump_conf = RPROC_COREDUMP_DISABLED;
+ } else if (sysfs_streq(buf, "enabled")) {
+ rproc->dump_conf = RPROC_COREDUMP_ENABLED;
+ } else if (sysfs_streq(buf, "inline")) {
+ rproc->dump_conf = RPROC_COREDUMP_INLINE;
+ } else {
+ dev_err(&rproc->dev, "Invalid coredump configuration\n");
+ return -EINVAL;
+ }
+
+ return count;
+}
+static DEVICE_ATTR_RW(coredump);
/* Expose the loaded / running firmware name via sysfs */
static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct rproc *rproc = to_rproc(dev);
+ const char *firmware = rproc->firmware;
- return sprintf(buf, "%s\n", rproc->firmware);
+ /*
+ * If the remote processor has been started by an external
+ * entity we have no idea of what image it is running. As such
+ * simply display a generic string rather then rproc->firmware.
+ *
+ * Here we rely on the autonomous flag because a remote processor
+ * may have been attached to and currently in a running state.
+ */
+ if (rproc->autonomous)
+ firmware = "unknown";
+
+ return sprintf(buf, "%s\n", firmware);
}
/* Change firmware name via sysfs */
@@ -32,38 +157,9 @@
const char *buf, size_t count)
{
struct rproc *rproc = to_rproc(dev);
- char *p;
- int err, len = count;
+ int err;
- err = mutex_lock_interruptible(&rproc->lock);
- if (err) {
- dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, err);
- return -EINVAL;
- }
-
- if (rproc->state != RPROC_OFFLINE) {
- dev_err(dev, "can't change firmware while running\n");
- err = -EBUSY;
- goto out;
- }
-
- len = strcspn(buf, "\n");
- if (!len) {
- dev_err(dev, "can't provide a NULL firmware\n");
- err = -EINVAL;
- goto out;
- }
-
- p = kstrndup(buf, len, GFP_KERNEL);
- if (!p) {
- err = -ENOMEM;
- goto out;
- }
-
- kfree(rproc->firmware);
- rproc->firmware = p;
-out:
- mutex_unlock(&rproc->lock);
+ err = rproc_set_firmware(rproc, buf);
return err ? err : count;
}
@@ -79,6 +175,7 @@
[RPROC_RUNNING] = "running",
[RPROC_CRASHED] = "crashed",
[RPROC_DELETED] = "deleted",
+ [RPROC_DETACHED] = "detached",
[RPROC_LAST] = "invalid",
};
@@ -121,9 +218,22 @@
}
static DEVICE_ATTR_RW(state);
+/* Expose the name of the remote processor via sysfs */
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct rproc *rproc = to_rproc(dev);
+
+ return sprintf(buf, "%s\n", rproc->name);
+}
+static DEVICE_ATTR_RO(name);
+
static struct attribute *rproc_attrs[] = {
+ &dev_attr_coredump.attr,
+ &dev_attr_recovery.attr,
&dev_attr_firmware.attr,
&dev_attr_state.attr,
+ &dev_attr_name.attr,
NULL
};
--
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