diff options
Diffstat (limited to 'drivers/misc/mei/main.c')
| -rw-r--r-- | drivers/misc/mei/main.c | 80 |
1 files changed, 62 insertions, 18 deletions
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 87281b3695e6..ad02097d7fee 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -1,18 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0 /* - * + * Copyright (c) 2003-2018, Intel Corporation. All rights reserved. * Intel Management Engine Interface (Intel MEI) Linux driver - * Copyright (c) 2003-2018, 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/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> @@ -37,6 +28,12 @@ #include "mei_dev.h" #include "client.h" +static struct class *mei_class; +static dev_t mei_devt; +#define MEI_MAX_DEVS MINORMASK +static DEFINE_MUTEX(mei_minor_lock); +static DEFINE_IDR(mei_idr); + /** * mei_open - the open function * @@ -838,12 +835,65 @@ static ssize_t fw_ver_show(struct device *device, } static DEVICE_ATTR_RO(fw_ver); +/** + * dev_state_show - display device state + * + * @device: device pointer + * @attr: attribute pointer + * @buf: char out buffer + * + * Return: number of the bytes printed into buf or error + */ +static ssize_t dev_state_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct mei_device *dev = dev_get_drvdata(device); + enum mei_dev_state dev_state; + + mutex_lock(&dev->device_lock); + dev_state = dev->dev_state; + mutex_unlock(&dev->device_lock); + + return sprintf(buf, "%s", mei_dev_state_str(dev_state)); +} +static DEVICE_ATTR_RO(dev_state); + +static int match_devt(struct device *dev, const void *data) +{ + const dev_t *devt = data; + + return dev->devt == *devt; +} + +/** + * dev_set_devstate: set to new device state and notify sysfs file. + * + * @dev: mei_device + * @state: new device state + */ +void mei_set_devstate(struct mei_device *dev, enum mei_dev_state state) +{ + struct device *clsdev; + + if (dev->dev_state == state) + return; + + dev->dev_state = state; + + clsdev = class_find_device(mei_class, NULL, &dev->cdev.dev, match_devt); + if (clsdev) { + sysfs_notify(&clsdev->kobj, NULL, "dev_state"); + put_device(clsdev); + } +} + static struct attribute *mei_attrs[] = { &dev_attr_fw_status.attr, &dev_attr_hbm_ver.attr, &dev_attr_hbm_ver_drv.attr, &dev_attr_tx_queue_limit.attr, &dev_attr_fw_ver.attr, + &dev_attr_dev_state.attr, NULL }; ATTRIBUTE_GROUPS(mei); @@ -867,12 +917,6 @@ static const struct file_operations mei_fops = { .llseek = no_llseek }; -static struct class *mei_class; -static dev_t mei_devt; -#define MEI_MAX_DEVS MINORMASK -static DEFINE_MUTEX(mei_minor_lock); -static DEFINE_IDR(mei_idr); - /** * mei_minor_get - obtain next free device minor number * |