144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
/*
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*
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* Intel Management Engine Interface (Intel MEI) Linux driver
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* Copyright (c) 2012-2013, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/debugfs.h>
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#include <linux/pci.h>
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#include <linux/mei.h>
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#include "mei_dev.h"
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#include "hw.h"
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static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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struct mei_device *dev = fp->private_data;
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struct mei_me_client *cl;
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const size_t bufsz = 1024;
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char *buf = kzalloc(bufsz, GFP_KERNEL);
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int i;
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int pos = 0;
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int ret;
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if (!buf)
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return -ENOMEM;
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pos += scnprintf(buf + pos, bufsz - pos,
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" |id|addr| UUID |con|msg len|\n");
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mutex_lock(&dev->device_lock);
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/* if the driver is not enabled the list won't be consistent */
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if (dev->dev_state != MEI_DEV_ENABLED)
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goto out;
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for (i = 0; i < dev->me_clients_num; i++) {
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cl = &dev->me_clients[i];
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/* skip me clients that cannot be connected */
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if (cl->props.max_number_of_connections == 0)
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continue;
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pos += scnprintf(buf + pos, bufsz - pos,
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"%2d|%2d|%4d|%pUl|%3d|%7d|\n",
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i, cl->client_id,
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cl->props.fixed_address,
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&cl->props.protocol_name,
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cl->props.max_number_of_connections,
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cl->props.max_msg_length);
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}
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out:
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mutex_unlock(&dev->device_lock);
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ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
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kfree(buf);
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return ret;
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}
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static const struct file_operations mei_dbgfs_fops_meclients = {
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.open = simple_open,
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.read = mei_dbgfs_read_meclients,
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.llseek = generic_file_llseek,
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};
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static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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struct mei_device *dev = fp->private_data;
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const size_t bufsz = 1024;
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char *buf = kzalloc(bufsz, GFP_KERNEL);
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int pos = 0;
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int ret;
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if (!buf)
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return -ENOMEM;
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pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
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mei_dev_state_str(dev->dev_state));
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ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
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kfree(buf);
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return ret;
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}
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static const struct file_operations mei_dbgfs_fops_devstate = {
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.open = simple_open,
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.read = mei_dbgfs_read_devstate,
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.llseek = generic_file_llseek,
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};
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/**
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* mei_dbgfs_deregister - Remove the debugfs files and directories
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* @mei - pointer to mei device private data
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*/
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void mei_dbgfs_deregister(struct mei_device *dev)
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{
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if (!dev->dbgfs_dir)
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return;
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debugfs_remove_recursive(dev->dbgfs_dir);
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dev->dbgfs_dir = NULL;
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}
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/**
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* Add the debugfs files
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*
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*/
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int mei_dbgfs_register(struct mei_device *dev, const char *name)
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{
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struct dentry *dir, *f;
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dir = debugfs_create_dir(name, NULL);
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if (!dir)
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return -ENOMEM;
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f = debugfs_create_file("meclients", S_IRUSR, dir,
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dev, &mei_dbgfs_fops_meclients);
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if (!f) {
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dev_err(&dev->pdev->dev, "meclients: registration failed\n");
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goto err;
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}
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f = debugfs_create_file("devstate", S_IRUSR, dir,
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dev, &mei_dbgfs_fops_devstate);
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if (!f) {
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dev_err(&dev->pdev->dev, "devstate: registration failed\n");
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goto err;
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}
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dev->dbgfs_dir = dir;
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return 0;
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err:
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mei_dbgfs_deregister(dev);
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return -ENODEV;
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}
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