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path: root/drivers/misc/mei/debugfs.c
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Diffstat (limited to 'drivers/misc/mei/debugfs.c')
-rw-r--r--drivers/misc/mei/debugfs.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index a3ae154..ced5b77 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -75,6 +75,54 @@ static const struct file_operations mei_dbgfs_fops_meclients = {
.llseek = generic_file_llseek,
};
+static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+{
+ struct mei_device *dev = fp->private_data;
+ struct mei_cl *cl;
+ const size_t bufsz = 1024;
+ char *buf;
+ int i = 0;
+ int pos = 0;
+ int ret;
+
+ if (!dev)
+ return -ENODEV;
+
+ buf = kzalloc(bufsz, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ pos += scnprintf(buf + pos, bufsz - pos,
+ " |me|host|state|rd|wr|\n");
+
+ mutex_lock(&dev->device_lock);
+
+ /* if the driver is not enabled the list won't b consitent */
+ if (dev->dev_state != MEI_DEV_ENABLED)
+ goto out;
+
+ list_for_each_entry(cl, &dev->file_list, link) {
+
+ pos += scnprintf(buf + pos, bufsz - pos,
+ "%2d|%2d|%4d|%5d|%2d|%2d|\n",
+ i, cl->me_client_id, cl->host_client_id, cl->state,
+ cl->reading_state, cl->writing_state);
+ i++;
+ }
+out:
+ mutex_unlock(&dev->device_lock);
+ ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
+ kfree(buf);
+ return ret;
+}
+
+static const struct file_operations mei_dbgfs_fops_active = {
+ .open = simple_open,
+ .read = mei_dbgfs_read_active,
+ .llseek = generic_file_llseek,
+};
+
static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
@@ -128,6 +176,12 @@ int mei_dbgfs_register(struct mei_device *dev, const char *name)
dev_err(&dev->pdev->dev, "meclients: registration failed\n");
goto err;
}
+ f = debugfs_create_file("active", S_IRUSR, dir,
+ dev, &mei_dbgfs_fops_active);
+ if (!f) {
+ dev_err(&dev->pdev->dev, "meclients: registration failed\n");
+ goto err;
+ }
f = debugfs_create_file("devstate", S_IRUSR, dir,
dev, &mei_dbgfs_fops_devstate);
if (!f) {
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