From 95099d4622f8cb224d94e314c7a8e0df60b13f87 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 09 Dec 2023 08:38:01 +0000
Subject: [PATCH] enable docker ppp
---
kernel/drivers/remoteproc/remoteproc_debugfs.c | 194 ++++++++++++++++++++++++++++++++++++------------
1 files changed, 146 insertions(+), 48 deletions(-)
diff --git a/kernel/drivers/remoteproc/remoteproc_debugfs.c b/kernel/drivers/remoteproc/remoteproc_debugfs.c
index a5c29f2..5819304 100644
--- a/kernel/drivers/remoteproc/remoteproc_debugfs.c
+++ b/kernel/drivers/remoteproc/remoteproc_debugfs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Remote Processor Framework
*
@@ -11,15 +12,6 @@
* Suman Anna <s-anna@ti.com>
* Robert Tivy <rtivy@ti.com>
* Armando Uribe De Leon <x0095078@ti.com>
- *
- * 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.
*/
#define pr_fmt(fmt) "%s: " fmt, __func__
@@ -36,6 +28,93 @@
static struct dentry *rproc_dbg;
/*
+ * A coredump-configuration-to-string lookup table, for exposing a
+ * human readable configuration via debugfs. 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 rproc_coredump_read(struct file *filp, char __user *userbuf,
+ size_t count, loff_t *ppos)
+{
+ struct rproc *rproc = filp->private_data;
+ char buf[20];
+ int len;
+
+ len = scnprintf(buf, sizeof(buf), "%s\n",
+ rproc_coredump_str[rproc->dump_conf]);
+
+ return simple_read_from_buffer(userbuf, count, ppos, buf, len);
+}
+
+/*
+ * By writing to the 'coredump' debugfs entry, we control the behavior of the
+ * coredump mechanism dynamically. The default value of this entry is "disabled".
+ *
+ * The 'coredump' debugfs entry supports these commands:
+ *
+ * disabled: By default coredump collection is disabled. Recovery will
+ * proceed without collecting any dump.
+ *
+ * enabled: 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 rproc_coredump_write(struct file *filp,
+ const char __user *user_buf, size_t count,
+ loff_t *ppos)
+{
+ struct rproc *rproc = filp->private_data;
+ int ret, err = 0;
+ char buf[20];
+
+ if (count < 1 || count > sizeof(buf))
+ return -EINVAL;
+
+ ret = copy_from_user(buf, user_buf, count);
+ if (ret)
+ return -EFAULT;
+
+ /* remove end of line */
+ if (buf[count - 1] == '\n')
+ buf[count - 1] = '\0';
+
+ if (rproc->state == RPROC_CRASHED) {
+ dev_err(&rproc->dev, "can't change coredump configuration\n");
+ err = -EBUSY;
+ goto out;
+ }
+
+ if (!strncmp(buf, "disabled", count)) {
+ rproc->dump_conf = RPROC_COREDUMP_DISABLED;
+ } else if (!strncmp(buf, "enabled", count)) {
+ rproc->dump_conf = RPROC_COREDUMP_ENABLED;
+ } else if (!strncmp(buf, "inline", count)) {
+ rproc->dump_conf = RPROC_COREDUMP_INLINE;
+ } else {
+ dev_err(&rproc->dev, "Invalid coredump configuration\n");
+ err = -EINVAL;
+ }
+out:
+ return err ? err : count;
+}
+
+static const struct file_operations rproc_coredump_fops = {
+ .read = rproc_coredump_read,
+ .write = rproc_coredump_write,
+ .open = simple_open,
+ .llseek = generic_file_llseek,
+};
+
+/*
* Some remote processors may support dumping trace logs into a shared
* memory buffer. We expose this trace buffer using debugfs, so users
* can easily tell what's going on remotely.
@@ -47,10 +126,23 @@
static ssize_t rproc_trace_read(struct file *filp, char __user *userbuf,
size_t count, loff_t *ppos)
{
- struct rproc_mem_entry *trace = filp->private_data;
- int len = strnlen(trace->va, trace->len);
+ struct rproc_debug_trace *data = filp->private_data;
+ struct rproc_mem_entry *trace = &data->trace_mem;
+ void *va;
+ char buf[100];
+ int len;
- return simple_read_from_buffer(userbuf, count, ppos, trace->va, len);
+ va = rproc_da_to_va(data->rproc, trace->da, trace->len, NULL);
+
+ if (!va) {
+ len = scnprintf(buf, sizeof(buf), "Trace %s not available\n",
+ trace->name);
+ va = buf;
+ } else {
+ len = strnlen(va, trace->len);
+ }
+
+ return simple_read_from_buffer(userbuf, count, ppos, va, len);
}
static const struct file_operations trace_rproc_ops = {
@@ -133,16 +225,16 @@
buf[count - 1] = '\0';
if (!strncmp(buf, "enabled", count)) {
+ /* change the flag and begin the recovery process if needed */
rproc->recovery_disabled = false;
- /* if rproc has crashed, trigger recovery */
- if (rproc->state == RPROC_CRASHED)
- rproc_trigger_recovery(rproc);
+ rproc_trigger_recovery(rproc);
} else if (!strncmp(buf, "disabled", count)) {
rproc->recovery_disabled = true;
} else if (!strncmp(buf, "recover", count)) {
- /* if rproc has crashed, trigger recovery */
- if (rproc->state == RPROC_CRASHED)
- rproc_trigger_recovery(rproc);
+ /* begin the recovery process without changing the flag */
+ rproc_trigger_recovery(rproc);
+ } else {
+ return -EINVAL;
}
return count;
@@ -151,6 +243,30 @@
static const struct file_operations rproc_recovery_ops = {
.read = rproc_recovery_read,
.write = rproc_recovery_write,
+ .open = simple_open,
+ .llseek = generic_file_llseek,
+};
+
+/* expose the crash trigger via debugfs */
+static ssize_t
+rproc_crash_write(struct file *filp, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct rproc *rproc = filp->private_data;
+ unsigned int type;
+ int ret;
+
+ ret = kstrtouint_from_user(user_buf, count, 0, &type);
+ if (ret < 0)
+ return ret;
+
+ rproc_report_crash(rproc, type);
+
+ return count;
+}
+
+static const struct file_operations rproc_crash_ops = {
+ .write = rproc_crash_write,
.open = simple_open,
.llseek = generic_file_llseek,
};
@@ -240,17 +356,7 @@
return 0;
}
-static int rproc_rsc_table_open(struct inode *inode, struct file *file)
-{
- return single_open(file, rproc_rsc_table_show, inode->i_private);
-}
-
-static const struct file_operations rproc_rsc_table_ops = {
- .open = rproc_rsc_table_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(rproc_rsc_table);
/* Expose carveout content via debugfs */
static int rproc_carveouts_show(struct seq_file *seq, void *p)
@@ -260,26 +366,17 @@
list_for_each_entry(carveout, &rproc->carveouts, node) {
seq_puts(seq, "Carveout memory entry:\n");
+ seq_printf(seq, "\tName: %s\n", carveout->name);
seq_printf(seq, "\tVirtual address: %pK\n", carveout->va);
seq_printf(seq, "\tDMA address: %pad\n", &carveout->dma);
seq_printf(seq, "\tDevice address: 0x%x\n", carveout->da);
- seq_printf(seq, "\tLength: 0x%x Bytes\n\n", carveout->len);
+ seq_printf(seq, "\tLength: 0x%zx Bytes\n\n", carveout->len);
}
return 0;
}
-static int rproc_carveouts_open(struct inode *inode, struct file *file)
-{
- return single_open(file, rproc_carveouts_show, inode->i_private);
-}
-
-static const struct file_operations rproc_carveouts_ops = {
- .open = rproc_carveouts_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(rproc_carveouts);
void rproc_remove_trace_file(struct dentry *tfile)
{
@@ -287,7 +384,7 @@
}
struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
- struct rproc_mem_entry *trace)
+ struct rproc_debug_trace *trace)
{
struct dentry *tfile;
@@ -303,9 +400,6 @@
void rproc_delete_debug_dir(struct rproc *rproc)
{
- if (!rproc->dbg_dir)
- return;
-
debugfs_remove_recursive(rproc->dbg_dir);
}
@@ -322,12 +416,16 @@
debugfs_create_file("name", 0400, rproc->dbg_dir,
rproc, &rproc_name_ops);
- debugfs_create_file("recovery", 0400, rproc->dbg_dir,
+ debugfs_create_file("recovery", 0600, rproc->dbg_dir,
rproc, &rproc_recovery_ops);
+ debugfs_create_file("crash", 0200, rproc->dbg_dir,
+ rproc, &rproc_crash_ops);
debugfs_create_file("resource_table", 0400, rproc->dbg_dir,
- rproc, &rproc_rsc_table_ops);
+ rproc, &rproc_rsc_table_fops);
debugfs_create_file("carveout_memories", 0400, rproc->dbg_dir,
- rproc, &rproc_carveouts_ops);
+ rproc, &rproc_carveouts_fops);
+ debugfs_create_file("coredump", 0600, rproc->dbg_dir,
+ rproc, &rproc_coredump_fops);
}
void __init rproc_init_debugfs(void)
--
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