mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
mei: add debugfs hooks
debugfs exposes device state and list of me clients and their properties Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
a864ec76db
commit
30e53bb8ff
5 changed files with 185 additions and 8 deletions
|
@ -11,6 +11,7 @@ mei-objs += main.o
|
|||
mei-objs += amthif.o
|
||||
mei-objs += wd.o
|
||||
mei-objs += bus.o
|
||||
mei-$(CONFIG_DEBUG_FS) += debugfs.o
|
||||
|
||||
obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o
|
||||
mei-me-objs := pci-me.o
|
||||
|
|
149
drivers/misc/mei/debugfs.c
Normal file
149
drivers/misc/mei/debugfs.c
Normal file
|
@ -0,0 +1,149 @@
|
|||
/*
|
||||
*
|
||||
* Intel Management Engine Interface (Intel MEI) Linux driver
|
||||
* Copyright (c) 2012-2013, Intel Corporation.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms and conditions of the GNU General Public License,
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope 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/slab.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/debugfs.h>
|
||||
#include <linux/pci.h>
|
||||
|
||||
#include <linux/mei.h>
|
||||
|
||||
#include "mei_dev.h"
|
||||
#include "hw.h"
|
||||
|
||||
static int mei_dbgfs_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
file->private_data = inode->i_private;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
|
||||
size_t cnt, loff_t *ppos)
|
||||
{
|
||||
struct mei_device *dev = fp->private_data;
|
||||
struct mei_me_client *cl;
|
||||
const size_t bufsz = 1024;
|
||||
char *buf = kzalloc(bufsz, GFP_KERNEL);
|
||||
int i;
|
||||
int pos = 0;
|
||||
int ret;
|
||||
|
||||
if (!buf)
|
||||
return -ENOMEM;
|
||||
|
||||
pos += scnprintf(buf + pos, bufsz - pos,
|
||||
" |id|addr| UUID |con|msg len|\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;
|
||||
|
||||
for (i = 0; i < dev->me_clients_num; i++) {
|
||||
cl = &dev->me_clients[i];
|
||||
|
||||
/* skip me clients that cannot be connected */
|
||||
if (cl->props.max_number_of_connections == 0)
|
||||
continue;
|
||||
|
||||
pos += scnprintf(buf + pos, bufsz - pos,
|
||||
"%2d|%2d|%4d|%pUl|%3d|%7d|\n",
|
||||
i, cl->client_id,
|
||||
cl->props.fixed_address,
|
||||
&cl->props.protocol_name,
|
||||
cl->props.max_number_of_connections,
|
||||
cl->props.max_msg_length);
|
||||
}
|
||||
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_meclients = {
|
||||
.open = mei_dbgfs_open,
|
||||
.read = mei_dbgfs_read_meclients,
|
||||
.llseek = generic_file_llseek,
|
||||
};
|
||||
|
||||
static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
|
||||
size_t cnt, loff_t *ppos)
|
||||
{
|
||||
struct mei_device *dev = fp->private_data;
|
||||
const size_t bufsz = 1024;
|
||||
char *buf = kzalloc(bufsz, GFP_KERNEL);
|
||||
int pos = 0;
|
||||
int ret;
|
||||
|
||||
if (!buf)
|
||||
return -ENOMEM;
|
||||
|
||||
pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
|
||||
mei_dev_state_str(dev->dev_state));
|
||||
ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
|
||||
kfree(buf);
|
||||
return ret;
|
||||
}
|
||||
static const struct file_operations mei_dbgfs_fops_devstate = {
|
||||
.open = mei_dbgfs_open,
|
||||
.read = mei_dbgfs_read_devstate,
|
||||
.llseek = generic_file_llseek,
|
||||
};
|
||||
|
||||
/**
|
||||
* mei_dbgfs_deregister - Remove the debugfs files and directories
|
||||
* @mei - pointer to mei device private dat
|
||||
*/
|
||||
void mei_dbgfs_deregister(struct mei_device *dev)
|
||||
{
|
||||
if (!dev->dbgfs_dir)
|
||||
return;
|
||||
debugfs_remove_recursive(dev->dbgfs_dir);
|
||||
dev->dbgfs_dir = NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* Add the debugfs files
|
||||
*
|
||||
*/
|
||||
int mei_dbgfs_register(struct mei_device *dev, const char *name)
|
||||
{
|
||||
struct dentry *dir, *f;
|
||||
dir = debugfs_create_dir(name, NULL);
|
||||
if (!dir)
|
||||
return -ENOMEM;
|
||||
|
||||
f = debugfs_create_file("meclients", S_IRUSR, dir,
|
||||
dev, &mei_dbgfs_fops_meclients);
|
||||
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) {
|
||||
dev_err(&dev->pdev->dev, "devstate: registration failed\n");
|
||||
goto err;
|
||||
}
|
||||
dev->dbgfs_dir = dir;
|
||||
return 0;
|
||||
err:
|
||||
mei_dbgfs_deregister(dev);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
|
@ -753,15 +753,25 @@ static struct miscdevice mei_misc_device = {
|
|||
.minor = MISC_DYNAMIC_MINOR,
|
||||
};
|
||||
|
||||
int mei_register(struct device *dev)
|
||||
|
||||
int mei_register(struct mei_device *dev)
|
||||
{
|
||||
mei_misc_device.parent = dev;
|
||||
return misc_register(&mei_misc_device);
|
||||
int ret;
|
||||
mei_misc_device.parent = &dev->pdev->dev;
|
||||
ret = misc_register(&mei_misc_device);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if (mei_dbgfs_register(dev, mei_misc_device.name))
|
||||
dev_err(&dev->pdev->dev, "cannot register debugfs\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(mei_register);
|
||||
|
||||
void mei_deregister(void)
|
||||
void mei_deregister(struct mei_device *dev)
|
||||
{
|
||||
mei_dbgfs_deregister(dev);
|
||||
misc_deregister(&mei_misc_device);
|
||||
mei_misc_device.parent = NULL;
|
||||
}
|
||||
|
|
|
@ -437,6 +437,11 @@ struct mei_device {
|
|||
/* List of bus devices */
|
||||
struct list_head device_list;
|
||||
|
||||
#if IS_ENABLED(CONFIG_DEBUG_FS)
|
||||
struct dentry *dbgfs_dir;
|
||||
#endif /* CONFIG_DEBUG_FS */
|
||||
|
||||
|
||||
const struct mei_hw_ops *ops;
|
||||
char hw[0] __aligned(sizeof(void *));
|
||||
};
|
||||
|
@ -603,8 +608,19 @@ static inline int mei_count_full_read_slots(struct mei_device *dev)
|
|||
return dev->ops->rdbuf_full_slots(dev);
|
||||
}
|
||||
|
||||
int mei_register(struct device *dev);
|
||||
void mei_deregister(void);
|
||||
#if IS_ENABLED(CONFIG_DEBUG_FS)
|
||||
int mei_dbgfs_register(struct mei_device *dev, const char *name);
|
||||
void mei_dbgfs_deregister(struct mei_device *dev);
|
||||
#else
|
||||
static inline int mei_dbgfs_register(struct mei_device *dev, const char *name)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
static inline void mei_dbgfs_deregister(struct mei_device *dev) {}
|
||||
#endif /* CONFIG_DEBUG_FS */
|
||||
|
||||
int mei_register(struct mei_device *dev);
|
||||
void mei_deregister(struct mei_device *dev);
|
||||
|
||||
#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d comp=%1d"
|
||||
#define MEI_HDR_PRM(hdr) \
|
||||
|
|
|
@ -190,7 +190,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
|
|||
goto release_irq;
|
||||
}
|
||||
|
||||
err = mei_register(&pdev->dev);
|
||||
err = mei_register(dev);
|
||||
if (err)
|
||||
goto release_irq;
|
||||
|
||||
|
@ -262,12 +262,13 @@ static void mei_me_remove(struct pci_dev *pdev)
|
|||
if (hw->mem_addr)
|
||||
pci_iounmap(pdev, hw->mem_addr);
|
||||
|
||||
mei_deregister(dev);
|
||||
|
||||
kfree(dev);
|
||||
|
||||
pci_release_regions(pdev);
|
||||
pci_disable_device(pdev);
|
||||
|
||||
mei_deregister();
|
||||
|
||||
}
|
||||
#ifdef CONFIG_PM
|
||||
|
|
Loading…
Reference in a new issue