diff options
Diffstat (limited to 'drivers/misc/mei/debugfs.c')
| -rw-r--r-- | drivers/misc/mei/debugfs.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c index a3ae154444b2..ced5b777c70f 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) { |