diff options
Diffstat (limited to 'drivers/platform/x86/dell')
| -rw-r--r-- | drivers/platform/x86/dell/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/Makefile | 2 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dcdbas.c | 3 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-laptop.c | 13 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-base.c (renamed from drivers/platform/x86/dell/dell-wmi.c) | 14 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-privacy.c | 391 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-privacy.h | 36 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-sysman/dell-wmi-sysman.h | 5 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-sysman/enum-attributes.c | 39 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-sysman/int-attributes.c | 16 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-sysman/passobj-attributes.c | 6 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-sysman/passwordattr-interface.c | 4 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-sysman/string-attributes.c | 16 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell-wmi-sysman/sysman.c | 21 | ||||
| -rw-r--r-- | drivers/platform/x86/dell/dell_rbu.c | 2 |
15 files changed, 551 insertions, 28 deletions
diff --git a/drivers/platform/x86/dell/Kconfig b/drivers/platform/x86/dell/Kconfig index e0a55337f51a..9e7314d90bea 100644 --- a/drivers/platform/x86/dell/Kconfig +++ b/drivers/platform/x86/dell/Kconfig @@ -5,7 +5,6 @@ menuconfig X86_PLATFORM_DRIVERS_DELL bool "Dell X86 Platform Specific Device Drivers" - default n depends on X86_PLATFORM_DEVICES help Say Y here to get to see options for device drivers for various @@ -53,6 +52,7 @@ config DELL_LAPTOP depends on BACKLIGHT_CLASS_DEVICE depends on ACPI_VIDEO || ACPI_VIDEO = n depends on RFKILL || RFKILL = n + depends on DELL_WMI || DELL_WMI = n depends on SERIO_I8042 depends on DELL_SMBIOS select POWER_SUPPLY @@ -164,6 +164,14 @@ config DELL_WMI To compile this driver as a module, choose M here: the module will be called dell-wmi. +config DELL_WMI_PRIVACY + bool "Dell WMI Hardware Privacy Support" + depends on DELL_WMI + depends on LEDS_TRIGGER_AUDIO + help + This option adds integration with the "Dell Hardware Privacy" + feature of Dell laptops to the dell-wmi driver. + config DELL_WMI_AIO tristate "WMI Hotkeys for Dell All-In-One series" default m @@ -197,6 +205,7 @@ config DELL_WMI_SYSMAN depends on ACPI_WMI depends on DMI select NLS + select FW_ATTR_CLASS help This driver allows changing BIOS settings on many Dell machines from 2018 and newer without the use of any additional software. diff --git a/drivers/platform/x86/dell/Makefile b/drivers/platform/x86/dell/Makefile index d720a3e42ae3..ddba1df71e80 100644 --- a/drivers/platform/x86/dell/Makefile +++ b/drivers/platform/x86/dell/Makefile @@ -15,6 +15,8 @@ dell-smbios-$(CONFIG_DELL_SMBIOS_WMI) += dell-smbios-wmi.o dell-smbios-$(CONFIG_DELL_SMBIOS_SMM) += dell-smbios-smm.o obj-$(CONFIG_DELL_SMO8800) += dell-smo8800.o obj-$(CONFIG_DELL_WMI) += dell-wmi.o +dell-wmi-objs := dell-wmi-base.o +dell-wmi-$(CONFIG_DELL_WMI_PRIVACY) += dell-wmi-privacy.o obj-$(CONFIG_DELL_WMI_AIO) += dell-wmi-aio.o obj-$(CONFIG_DELL_WMI_DESCRIPTOR) += dell-wmi-descriptor.o obj-$(CONFIG_DELL_WMI_LED) += dell-wmi-led.o diff --git a/drivers/platform/x86/dell/dcdbas.c b/drivers/platform/x86/dell/dcdbas.c index d513a59a5d47..28447c180be8 100644 --- a/drivers/platform/x86/dell/dcdbas.c +++ b/drivers/platform/x86/dell/dcdbas.c @@ -394,8 +394,7 @@ static int host_control_smi(void) /* wait a few to see if it executed */ num_ticks = TIMEOUT_USEC_SHORT_SEMA_BLOCKING; - while ((cmd_status = inb(PCAT_APM_STATUS_PORT)) - == ESM_STATUS_CMD_UNSUCCESSFUL) { + while ((s8)inb(PCAT_APM_STATUS_PORT) == ESM_STATUS_CMD_UNSUCCESSFUL) { num_ticks--; if (num_ticks == EXPIRED_TIMER) return -ETIME; diff --git a/drivers/platform/x86/dell/dell-laptop.c b/drivers/platform/x86/dell/dell-laptop.c index 70edc5bb3a14..8230e7a68a5e 100644 --- a/drivers/platform/x86/dell/dell-laptop.c +++ b/drivers/platform/x86/dell/dell-laptop.c @@ -31,6 +31,8 @@ #include "dell-rbtn.h" #include "dell-smbios.h" +#include "dell-wmi-privacy.h" + struct quirk_entry { bool touchpad_led; bool kbd_led_not_present; @@ -90,6 +92,7 @@ static struct rfkill *wifi_rfkill; static struct rfkill *bluetooth_rfkill; static struct rfkill *wwan_rfkill; static bool force_rfkill; +static bool micmute_led_registered; module_param(force_rfkill, bool, 0444); MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models"); @@ -2205,11 +2208,13 @@ static int __init dell_init(void) dell_laptop_register_notifier(&dell_laptop_notifier); if (dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE) && - dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE)) { + dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE) && + !dell_privacy_has_mic_mute()) { micmute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE); ret = led_classdev_register(&platform_device->dev, &micmute_led_cdev); if (ret < 0) goto fail_led; + micmute_led_registered = true; } if (acpi_video_get_backlight_type() != acpi_backlight_vendor) @@ -2257,7 +2262,8 @@ static int __init dell_init(void) fail_get_brightness: backlight_device_unregister(dell_backlight_device); fail_backlight: - led_classdev_unregister(&micmute_led_cdev); + if (micmute_led_registered) + led_classdev_unregister(&micmute_led_cdev); fail_led: dell_cleanup_rfkill(); fail_rfkill: @@ -2278,7 +2284,8 @@ static void __exit dell_exit(void) touchpad_led_exit(); kbd_led_exit(); backlight_device_unregister(dell_backlight_device); - led_classdev_unregister(&micmute_led_cdev); + if (micmute_led_registered) + led_classdev_unregister(&micmute_led_cdev); dell_cleanup_rfkill(); if (platform_device) { platform_device_unregister(platform_device); diff --git a/drivers/platform/x86/dell/dell-wmi.c b/drivers/platform/x86/dell/dell-wmi-base.c index 5e1b7f897df5..089c125e18f7 100644 --- a/drivers/platform/x86/dell/dell-wmi.c +++ b/drivers/platform/x86/dell/dell-wmi-base.c @@ -27,6 +27,7 @@ #include <acpi/video.h> #include "dell-smbios.h" #include "dell-wmi-descriptor.h" +#include "dell-wmi-privacy.h" MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); MODULE_AUTHOR("Pali Rohár <pali@kernel.org>"); @@ -427,7 +428,6 @@ static void dell_wmi_notify(struct wmi_device *wdev, switch (buffer_entry[1]) { case 0x0000: /* One key pressed or event occurred */ - case 0x0012: /* Event with extended data occurred */ if (len > 2) dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[2]); @@ -439,6 +439,13 @@ static void dell_wmi_notify(struct wmi_device *wdev, dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[i]); break; + case 0x0012: + if ((len > 4) && dell_privacy_process_event(buffer_entry[1], buffer_entry[3], + buffer_entry[4])) + /* dell_privacy_process_event has handled the event */; + else if (len > 2) + dell_wmi_process_key(wdev, buffer_entry[1], buffer_entry[2]); + break; default: /* Unknown event */ pr_info("Unknown WMI event type 0x%x\n", (int)buffer_entry[1]); @@ -747,6 +754,10 @@ static int __init dell_wmi_init(void) } } + err = dell_privacy_register_driver(); + if (err) + return err; + return wmi_driver_register(&dell_wmi_driver); } late_initcall(dell_wmi_init); @@ -757,6 +768,7 @@ static void __exit dell_wmi_exit(void) dell_wmi_events_set_enabled(false); wmi_driver_unregister(&dell_wmi_driver); + dell_privacy_unregister_driver(); } module_exit(dell_wmi_exit); diff --git a/drivers/platform/x86/dell/dell-wmi-privacy.c b/drivers/platform/x86/dell/dell-wmi-privacy.c new file mode 100644 index 000000000000..074b7e68c227 --- /dev/null +++ b/drivers/platform/x86/dell/dell-wmi-privacy.c @@ -0,0 +1,391 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Dell privacy notification driver + * + * Copyright (C) 2021 Dell Inc. All Rights Reserved. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/acpi.h> +#include <linux/bitops.h> +#include <linux/input.h> +#include <linux/input/sparse-keymap.h> +#include <linux/list.h> +#include <linux/leds.h> +#include <linux/module.h> +#include <linux/wmi.h> + +#include "dell-wmi-privacy.h" + +#define DELL_PRIVACY_GUID "6932965F-1671-4CEB-B988-D3AB0A901919" +#define MICROPHONE_STATUS BIT(0) +#define CAMERA_STATUS BIT(1) +#define DELL_PRIVACY_AUDIO_EVENT 0x1 +#define DELL_PRIVACY_CAMERA_EVENT 0x2 +#define led_to_priv(c) container_of(c, struct privacy_wmi_data, cdev) + +/* + * The wmi_list is used to store the privacy_priv struct with mutex protecting + */ +static LIST_HEAD(wmi_list); +static DEFINE_MUTEX(list_mutex); + +struct privacy_wmi_data { + struct input_dev *input_dev; + struct wmi_device *wdev; + struct list_head list; + struct led_classdev cdev; + u32 features_present; + u32 last_status; +}; + +/* DELL Privacy Type */ +enum dell_hardware_privacy_type { + DELL_PRIVACY_TYPE_AUDIO = 0, + DELL_PRIVACY_TYPE_CAMERA, + DELL_PRIVACY_TYPE_SCREEN, + DELL_PRIVACY_TYPE_MAX, +}; + +static const char * const privacy_types[DELL_PRIVACY_TYPE_MAX] = { + [DELL_PRIVACY_TYPE_AUDIO] = "Microphone", + [DELL_PRIVACY_TYPE_CAMERA] = "Camera Shutter", + [DELL_PRIVACY_TYPE_SCREEN] = "ePrivacy Screen", +}; + +/* + * Keymap for WMI privacy events of type 0x0012 + */ +static const struct key_entry dell_wmi_keymap_type_0012[] = { + /* privacy mic mute */ + { KE_KEY, 0x0001, { KEY_MICMUTE } }, + /* privacy camera mute */ + { KE_SW, 0x0002, { SW_CAMERA_LENS_COVER } }, + { KE_END, 0}, +}; + +bool dell_privacy_has_mic_mute(void) +{ + struct privacy_wmi_data *priv; + + mutex_lock(&list_mutex); + priv = list_first_entry_or_null(&wmi_list, + struct privacy_wmi_data, + list); + mutex_unlock(&list_mutex); + + return priv && (priv->features_present & BIT(DELL_PRIVACY_TYPE_AUDIO)); +} +EXPORT_SYMBOL_GPL(dell_privacy_has_mic_mute); + +/* + * The flow of privacy event: + * 1) User presses key. HW does stuff with this key (timeout is started) + * 2) WMI event is emitted from BIOS + * 3) WMI event is received by dell-privacy + * 4) KEY_MICMUTE emitted from dell-privacy + * 5) Userland picks up key and modifies kcontrol for SW mute + * 6) Codec kernel driver catches and calls ledtrig_audio_set which will call + * led_set_brightness() on the LED registered by dell_privacy_leds_setup() + * 7) dell-privacy notifies EC, the timeout is cancelled and the HW mute activates. + * If the EC is not notified then the HW mic mute will activate when the timeout + * triggers, just a bit later than with the active ack. + */ +bool dell_privacy_process_event(int type, int code, int status) +{ + struct privacy_wmi_data *priv; + const struct key_entry *key; + bool ret = false; + + mutex_lock(&list_mutex); + priv = list_first_entry_or_null(&wmi_list, + struct privacy_wmi_data, + list); + if (!priv) + goto error; + + key = sparse_keymap_entry_from_scancode(priv->input_dev, (type << 16) | code); + if (!key) { + dev_warn(&priv->wdev->dev, "Unknown key with type 0x%04x and code 0x%04x pressed\n", + type, code); + goto error; + } + dev_dbg(&priv->wdev->dev, "Key with type 0x%04x and code 0x%04x pressed\n", type, code); + + switch (code) { + case DELL_PRIVACY_AUDIO_EVENT: /* Mic mute */ + case DELL_PRIVACY_CAMERA_EVENT: /* Camera mute */ + priv->last_status = status; + sparse_keymap_report_entry(priv->input_dev, key, 1, true); + ret = true; + break; + default: + dev_dbg(&priv->wdev->dev, "unknown event type 0x%04x 0x%04x\n", type, code); + } + +error: + mutex_unlock(&list_mutex); + return ret; +} + +static ssize_t dell_privacy_supported_type_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct privacy_wmi_data *priv = dev_get_drvdata(dev); + enum dell_hardware_privacy_type type; + u32 privacy_list; + int len = 0; + + privacy_list = priv->features_present; + for (type = DELL_PRIVACY_TYPE_AUDIO; type < DELL_PRIVACY_TYPE_MAX; type++) { + if (privacy_list & BIT(type)) + len += sysfs_emit_at(buf, len, "[%s] [supported]\n", privacy_types[type]); + else + len += sysfs_emit_at(buf, len, "[%s] [unsupported]\n", privacy_types[type]); + } + + return len; +} + +static ssize_t dell_privacy_current_state_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct privacy_wmi_data *priv = dev_get_drvdata(dev); + u32 privacy_supported = priv->features_present; + enum dell_hardware_privacy_type type; + u32 privacy_state = priv->last_status; + int len = 0; + + for (type = DELL_PRIVACY_TYPE_AUDIO; type < DELL_PRIVACY_TYPE_MAX; type++) { + if (privacy_supported & BIT(type)) { + if (privacy_state & BIT(type)) + len += sysfs_emit_at(buf, len, "[%s] [unmuted]\n", privacy_types[type]); + else + len += sysfs_emit_at(buf, len, "[%s] [muted]\n", privacy_types[type]); + } + } + + return len; +} + +static DEVICE_ATTR_RO(dell_privacy_supported_type); +static DEVICE_ATTR_RO(dell_privacy_current_state); + +static struct attribute *privacy_attributes[] = { + &dev_attr_dell_privacy_supported_type.attr, + &dev_attr_dell_privacy_current_state.attr, + NULL, +}; + +static const struct attribute_group privacy_attribute_group = { + .attrs = privacy_attributes +}; + +/* + * Describes the Device State class exposed by BIOS which can be consumed by + * various applications interested in knowing the Privacy feature capabilities. + * class DeviceState + * { + * [key, read] string InstanceName; + * [read] boolean ReadOnly; + * + * [WmiDataId(1), read] uint32 DevicesSupported; + * 0 - None; 0x1 - Microphone; 0x2 - Camera; 0x4 - ePrivacy Screen + * + * [WmiDataId(2), read] uint32 CurrentState; + * 0 - Off; 1 - On; Bit0 - Microphone; Bit1 - Camera; Bit2 - ePrivacyScreen + * }; + */ +static int get_current_status(struct wmi_device *wdev) +{ + struct privacy_wmi_data *priv = dev_get_drvdata(&wdev->dev); + union acpi_object *obj_present; + u32 *buffer; + int ret = 0; + + if (!priv) { + dev_err(&wdev->dev, "dell privacy priv is NULL\n"); + return -EINVAL; + } + /* check privacy support features and device states */ + obj_present = wmidev_block_query(wdev, 0); + if (!obj_present) { + dev_err(&wdev->dev, "failed to read Binary MOF\n"); + return -EIO; + } + + if (obj_present->type != ACPI_TYPE_BUFFER) { + dev_err(&wdev->dev, "Binary MOF is not a buffer!\n"); + ret = -EIO; + goto obj_free; + } + /* Although it's not technically a failure, this would lead to + * unexpected behavior + */ + if (obj_present->buffer.length != 8) { + dev_err(&wdev->dev, "Dell privacy buffer has unexpected length (%d)!\n", + obj_present->buffer.length); + ret = -EINVAL; + goto obj_free; + } + buffer = (u32 *)obj_present->buffer.pointer; + priv->features_present = buffer[0]; + priv->last_status = buffer[1]; + +obj_free: + kfree(obj_present); + return ret; +} + +static int dell_privacy_micmute_led_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct privacy_wmi_data *priv = led_to_priv(led_cdev); + static char *acpi_method = (char *)"ECAK"; + acpi_status status; + acpi_handle handle; + + handle = ec_get_handle(); + if (!handle) + return -EIO; + + if (!acpi_has_method(handle, acpi_method)) + return -EIO; + + status = acpi_evaluate_object(handle, acpi_method, NULL, NULL); + if (ACPI_FAILURE(status)) { + dev_err(&priv->wdev->dev, "Error setting privacy EC ack value: %s\n", + acpi_format_exception(status)); + return -EIO; + } + + return 0; +} + +/* + * Pressing the mute key activates a time delayed circuit to physically cut + * off the mute. The LED is in the same circuit, so it reflects the true + * state of the HW mute. The reason for the EC "ack" is so that software + * can first invoke a SW mute before the HW circuit is cut off. Without SW + * cutting this off first does not affect the time delayed muting or status + * of the LED but there is a possibility of a "popping" noise. + * + * If the EC receives the SW ack, the circuit will be activated before the + * delay completed. + * + * Exposing as an LED device allows the codec drivers notification path to + * EC ACK to work + */ +static int dell_privacy_leds_setup(struct device *dev) +{ + struct privacy_wmi_data *priv = dev_get_drvdata(dev); + + priv->cdev.name = "dell-privacy::micmute"; + priv->cdev.max_brightness = 1; + priv->cdev.brightness_set_blocking = dell_privacy_micmute_led_set; + priv->cdev.default_trigger = "audio-micmute"; + priv->cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE); + return devm_led_classdev_register(dev, &priv->cdev); +} + +static int dell_privacy_wmi_probe(struct wmi_device *wdev, const void *context) +{ + struct privacy_wmi_data *priv; + struct key_entry *keymap; + int ret, i; + + ret = wmi_has_guid(DELL_PRIVACY_GUID); + if (!ret) + pr_debug("Unable to detect available Dell privacy devices!\n"); + + priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + dev_set_drvdata(&wdev->dev, priv); + priv->wdev = wdev; + /* create evdev passing interface */ + priv->input_dev = devm_input_allocate_device(&wdev->dev); + if (!priv->input_dev) + return -ENOMEM; + + /* remap the wmi keymap event to new keymap */ + keymap = kcalloc(ARRAY_SIZE(dell_wmi_keymap_type_0012), + sizeof(struct key_entry), GFP_KERNEL); + if (!keymap) + return -ENOMEM; + + /* remap the keymap code with Dell privacy key type 0x12 as prefix + * KEY_MICMUTE scancode will be reported as 0x120001 + */ + for (i = 0; i < ARRAY_SIZE(dell_wmi_keymap_type_0012); i++) { + keymap[i] = dell_wmi_keymap_type_0012[i]; + keymap[i].code |= (0x0012 << 16); + } + ret = sparse_keymap_setup(priv->input_dev, keymap, NULL); + kfree(keymap); + if (ret) + return ret; + + priv->input_dev->dev.parent = &wdev->dev; + priv->input_dev->name = "Dell Privacy Driver"; + priv->input_dev->id.bustype = BUS_HOST; + + ret = input_register_device(priv->input_dev); + if (ret) + return ret; + + ret = get_current_status(priv->wdev); + if (ret) + return ret; + + ret = devm_device_add_group(&wdev->dev, &privacy_attribute_group); + if (ret) + return ret; + + if (priv->features_present & BIT(DELL_PRIVACY_TYPE_AUDIO)) { + ret = dell_privacy_leds_setup(&priv->wdev->dev); + if (ret) + return ret; + } + mutex_lock(&list_mutex); + list_add_tail(&priv->list, &wmi_list); + mutex_unlock(&list_mutex); + return 0; +} + +static void dell_privacy_wmi_remove(struct wmi_device *wdev) +{ + struct privacy_wmi_data *priv = dev_get_drvdata(&wdev->dev); + + mutex_lock(&list_mutex); + list_del(&priv->list); + mutex_unlock(&list_mutex); +} + +static const struct wmi_device_id dell_wmi_privacy_wmi_id_table[] = { + { .guid_string = DELL_PRIVACY_GUID }, + { }, +}; + +static struct wmi_driver dell_privacy_wmi_driver = { + .driver = { + .name = "dell-privacy", + }, + .probe = dell_privacy_wmi_probe, + .remove = dell_privacy_wmi_remove, + .id_table = dell_wmi_privacy_wmi_id_table, +}; + +int dell_privacy_register_driver(void) +{ + return wmi_driver_register(&dell_privacy_wmi_driver); +} + +void dell_privacy_unregister_driver(void) +{ + wmi_driver_unregister(&dell_privacy_wmi_driver); +} diff --git a/drivers/platform/x86/dell/dell-wmi-privacy.h b/drivers/platform/x86/dell/dell-wmi-privacy.h new file mode 100644 index 000000000000..50c9b943dd47 --- /dev/null +++ b/drivers/platform/x86/dell/dell-wmi-privacy.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Dell privacy notification driver + * + * Copyright (C) 2021 Dell Inc. All Rights Reserved. + */ + +#ifndef _DELL_PRIVACY_WMI_H_ +#define _DELL_PRIVACY_WMI_H_ + +#if IS_ENABLED(CONFIG_DELL_WMI_PRIVACY) +bool dell_privacy_has_mic_mute(void); +bool dell_privacy_process_event(int type, int code, int status); +int dell_privacy_register_driver(void); +void dell_privacy_unregister_driver(void); +#else /* CONFIG_DELL_PRIVACY */ +static inline bool dell_privacy_has_mic_mute(void) +{ + return false; +} + +static inline bool dell_privacy_process_event(int type, int code, int status) +{ + return false; +} + +static inline int dell_privacy_register_driver(void) +{ + return 0; +} + +static inline void dell_privacy_unregister_driver(void) +{ +} +#endif /* CONFIG_DELL_PRIVACY */ +#endif diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/dell-wmi-sysman.h b/drivers/platform/x86/dell/dell-wmi-sysman/dell-wmi-sysman.h index b80f2a62ea3f..3ad33a094588 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/dell-wmi-sysman.h +++ b/drivers/platform/x86/dell/dell-wmi-sysman/dell-wmi-sysman.h @@ -152,12 +152,15 @@ static ssize_t curr_val##_store(struct kobject *kobj, \ return ret ? ret : count; \ } +#define check_property_type(attr, prop, valuetype) \ + (attr##_obj[prop].type != valuetype) + union acpi_object *get_wmiobj_pointer(int instance_id, const char *guid_string); int get_instance_count(const char *guid_string); void strlcpy_attr(char *dest, char *src); int populate_enum_data(union acpi_object *enumeration_obj, int instance_id, - struct kobject *attr_name_kobj); + struct kobject *attr_name_kobj, u32 enum_property_count); int alloc_enum_data(void); void exit_enum_attributes(void); diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/enum-attributes.c b/drivers/platform/x86/dell/dell-wmi-sysman/enum-attributes.c index 091e48c217ed..8cc212c85266 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/enum-attributes.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/enum-attributes.c @@ -132,39 +132,68 @@ int alloc_enum_data(void) * @enumeration_obj: ACPI object with enumeration data * @instance_id: The instance to enumerate * @attr_name_kobj: The parent kernel object + * @enum_property_count: Total properties count under enumeration type */ int populate_enum_data(union acpi_object *enumeration_obj, int instance_id, - struct kobject *attr_name_kobj) + struct kobject *attr_name_kobj, u32 enum_property_count) { int i, next_obj, value_modifier_count, possible_values_count; wmi_priv.enumeration_data[instance_id].attr_name_kobj = attr_name_kobj; + if (check_property_type(enumeration, ATTR_NAME, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.enumeration_data[instance_id].attribute_name, enumeration_obj[ATTR_NAME].string.pointer); + if (check_property_type(enumeration, DISPL_NAME_LANG_CODE, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.enumeration_data[instance_id].display_name_language_code, enumeration_obj[DISPL_NAME_LANG_CODE].string.pointer); + if (check_property_type(enumeration, DISPLAY_NAME, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.enumeration_data[instance_id].display_name, enumeration_obj[DISPLAY_NAME].string.pointer); + if (check_property_type(enumeration, DEFAULT_VAL, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.enumeration_data[instance_id].default_value, enumeration_obj[DEFAULT_VAL].string.pointer); + if (check_property_type(enumeration, MODIFIER, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.enumeration_data[instance_id].dell_modifier, enumeration_obj[MODIFIER].string.pointer); next_obj = MODIFIER + 1; - value_modifier_count = (uintptr_t)enumeration_obj[next_obj].string.pointer; + if (next_obj >= enum_property_count) + return -EINVAL; + + if (check_property_type(enumeration, next_obj, ACPI_TYPE_INTEGER)) + return -EINVAL; + value_modifier_count = (uintptr_t)enumeration_obj[next_obj++].string.pointer; for (i = 0; i < value_modifier_count; i++) { + if (next_obj >= enum_property_count) + return -EINVAL; + if (check_property_type(enumeration, next_obj, ACPI_TYPE_STRING)) + return -EINVAL; strcat(wmi_priv.enumeration_data[instance_id].dell_value_modifier, - enumeration_obj[++next_obj].string.pointer); + enumeration_obj[next_obj++].string.pointer); strcat(wmi_priv.enumeration_data[instance_id].dell_value_modifier, ";"); } - possible_values_count = (uintptr_t) enumeration_obj[++next_obj].string.pointer; + if (next_obj >= enum_property_count) + return -EINVAL; + + if (check_property_type(enumeration, next_obj, ACPI_TYPE_INTEGER)) + return -EINVAL; + possible_values_count = (uintptr_t) enumeration_obj[next_obj++].string.pointer; for (i = 0; i < possible_values_count; i++) { + if (next_obj >= enum_property_count) + return -EINVAL; + if (check_property_type(enumeration, next_obj, ACPI_TYPE_STRING)) + return -EINVAL; strcat(wmi_priv.enumeration_data[instance_id].possible_values, - enumeration_obj[++next_obj].string.pointer); + enumeration_obj[next_obj++].string.pointer); strcat(wmi_priv.enumeration_data[instance_id].possible_values, ";"); } diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/int-attributes.c b/drivers/platform/x86/dell/dell-wmi-sysman/int-attributes.c index 8a49ba6e44f9..951e75b538fa 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/int-attributes.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/int-attributes.c @@ -141,20 +141,36 @@ int populate_int_data(union acpi_object *integer_obj, int instance_id, struct kobject *attr_name_kobj) { wmi_priv.integer_data[instance_id].attr_name_kobj = attr_name_kobj; + if (check_property_type(integer, ATTR_NAME, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.integer_data[instance_id].attribute_name, integer_obj[ATTR_NAME].string.pointer); + if (check_property_type(integer, DISPL_NAME_LANG_CODE, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.integer_data[instance_id].display_name_language_code, integer_obj[DISPL_NAME_LANG_CODE].string.pointer); + if (check_property_type(integer, DISPLAY_NAME, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.integer_data[instance_id].display_name, integer_obj[DISPLAY_NAME].string.pointer); + if (check_property_type(integer, DEFAULT_VAL, ACPI_TYPE_INTEGER)) + return -EINVAL; wmi_priv.integer_data[instance_id].default_value = (uintptr_t)integer_obj[DEFAULT_VAL].string.pointer; + if (check_property_type(integer, MODIFIER, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.integer_data[instance_id].dell_modifier, integer_obj[MODIFIER].string.pointer); + if (check_property_type(integer, MIN_VALUE, ACPI_TYPE_INTEGER)) + return -EINVAL; wmi_priv.integer_data[instance_id].min_value = (uintptr_t)integer_obj[MIN_VALUE].string.pointer; + if (check_property_type(integer, MAX_VALUE, ACPI_TYPE_INTEGER)) + return -EINVAL; wmi_priv.integer_data[instance_id].max_value = (uintptr_t)integer_obj[MAX_VALUE].string.pointer; + if (check_property_type(integer, SCALAR_INCR, ACPI_TYPE_INTEGER)) + return -EINVAL; wmi_priv.integer_data[instance_id].scalar_increment = (uintptr_t)integer_obj[SCALAR_INCR].string.pointer; diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/passobj-attributes.c b/drivers/platform/x86/dell/dell-wmi-sysman/passobj-attributes.c index 834b3e82ad9f..230e6ee96636 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/passobj-attributes.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/passobj-attributes.c @@ -159,10 +159,16 @@ int alloc_po_data(void) int populate_po_data(union acpi_object *po_obj, int instance_id, struct kobject *attr_name_kobj) { wmi_priv.po_data[instance_id].attr_name_kobj = attr_name_kobj; + if (check_property_type(po, ATTR_NAME, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.po_data[instance_id].attribute_name, po_obj[ATTR_NAME].string.pointer); + if (check_property_type(po, MIN_PASS_LEN, ACPI_TYPE_INTEGER)) + return -EINVAL; wmi_priv.po_data[instance_id].min_password_length = (uintptr_t)po_obj[MIN_PASS_LEN].string.pointer; + if (check_property_type(po, MAX_PASS_LEN, ACPI_TYPE_INTEGER)) + return -EINVAL; wmi_priv.po_data[instance_id].max_password_length = (uintptr_t) po_obj[MAX_PASS_LEN].string.pointer; diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/passwordattr-interface.c b/drivers/platform/x86/dell/dell-wmi-sysman/passwordattr-interface.c index 339a082d6c18..86ec962aace9 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/passwordattr-interface.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/passwordattr-interface.c @@ -95,9 +95,9 @@ int set_new_password(const char *password_type, const char *new) print_hex_dump_bytes("set new password data: ", DUMP_PREFIX_NONE, buffer, buffer_size); ret = call_password_interface(wmi_priv.password_attr_wdev, buffer, buffer_size); - /* clear current_password here and use user input from wmi_priv.current_password */ + /* on success copy the new password to current password */ if (!ret) - memset(current_password, 0, MAX_BUFF); + strscpy(current_password, new, MAX_BUFF); /* explain to user the detailed failure reason */ else if (ret == -EOPNOTSUPP) dev_err(&wmi_priv.password_attr_wdev->dev, "admin password must be configured\n"); diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/string-attributes.c b/drivers/platform/x86/dell/dell-wmi-sysman/string-attributes.c index 552537852459..c392f0ecf8b5 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/string-attributes.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/string-attributes.c @@ -118,24 +118,38 @@ int alloc_str_data(void) /** * populate_str_data() - Populate all properties of an instance under string attribute - * @str_obj: ACPI object with integer data + * @str_obj: ACPI object with string data * @instance_id: The instance to enumerate * @attr_name_kobj: The parent kernel object */ int populate_str_data(union acpi_object *str_obj, int instance_id, struct kobject *attr_name_kobj) { wmi_priv.str_data[instance_id].attr_name_kobj = attr_name_kobj; + if (check_property_type(str, ATTR_NAME, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.str_data[instance_id].attribute_name, str_obj[ATTR_NAME].string.pointer); + if (check_property_type(str, DISPL_NAME_LANG_CODE, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.str_data[instance_id].display_name_language_code, str_obj[DISPL_NAME_LANG_CODE].string.pointer); + if (check_property_type(str, DISPLAY_NAME, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.str_data[instance_id].display_name, str_obj[DISPLAY_NAME].string.pointer); + if (check_property_type(str, DEFAULT_VAL, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.str_data[instance_id].default_value, str_obj[DEFAULT_VAL].string.pointer); + if (check_property_type(str, MODIFIER, ACPI_TYPE_STRING)) + return -EINVAL; strlcpy_attr(wmi_priv.str_data[instance_id].dell_modifier, str_obj[MODIFIER].string.pointer); + if (check_property_type(str, MIN_LEN, ACPI_TYPE_INTEGER)) + return -EINVAL; wmi_priv.str_data[instance_id].min_length = (uintptr_t)str_obj[MIN_LEN].string.pointer; + if (check_property_type(str, MAX_LEN, ACPI_TYPE_INTEGER)) + return -EINVAL; wmi_priv.str_data[instance_id].max_length = (uintptr_t) str_obj[MAX_LEN].string.pointer; return sysfs_create_group(attr_name_kobj, &str_attr_group); diff --git a/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c b/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c index c8d276d78e92..636bdfa83284 100644 --- a/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c +++ b/drivers/platform/x86/dell/dell-wmi-sysman/sysman.c @@ -13,14 +13,11 @@ #include <linux/kernel.h> #include <linux/wmi.h> #include "dell-wmi-sysman.h" +#include "../../firmware_attributes_class.h" #define MAX_TYPES 4 #include <linux/nls.h> -static struct class firmware_attributes_class = { - .name = "firmware-attributes", -}; - struct wmi_sysman_priv wmi_priv = { .mutex = __MUTEX_INITIALIZER(wmi_priv.mutex), }; @@ -28,6 +25,7 @@ struct wmi_sysman_priv wmi_priv = { /* reset bios to defaults */ static const char * const reset_types[] = {"builtinsafe", "lastknowngood", "factory", "custom"}; static int reset_option = -1; +static struct class *fw_attr_class; /** @@ -481,7 +479,8 @@ static int init_bios_attributes(int attr_type, const char *guid) /* enumerate all of this attribute */ switch (attr_type) { case ENUM: - retval = populate_enum_data(elements, instance_id, attr_name_kobj); + retval = populate_enum_data(elements, instance_id, attr_name_kobj, + obj->package.count); break; case INT: retval = populate_int_data(elements, instance_id, attr_name_kobj); @@ -541,11 +540,11 @@ static int __init sysman_init(void) goto err_exit_bios_attr_pass_interface; } - ret = class_register(&firmware_attributes_class); + ret = fw_attributes_class_get(&fw_attr_class); if (ret) goto err_exit_bios_attr_pass_interface; - wmi_priv.class_dev = device_create(&firmware_attributes_class, NULL, MKDEV(0, 0), + wmi_priv.class_dev = device_create(fw_attr_class, NULL, MKDEV(0, 0), NULL, "%s", DRIVER_NAME); if (IS_ERR(wmi_priv.class_dev)) { ret = PTR_ERR(wmi_priv.class_dev); @@ -602,10 +601,10 @@ err_release_attributes_data: release_attributes_data(); err_destroy_classdev: - device_destroy(&firmware_attributes_class, MKDEV(0, 0)); + device_destroy(fw_attr_class, MKDEV(0, 0)); err_unregister_class: - class_unregister(&firmware_attributes_class); + fw_attributes_class_put(); err_exit_bios_attr_pass_interface: exit_bios_attr_pass_interface(); @@ -619,8 +618,8 @@ err_exit_bios_attr_set_interface: static void __exit sysman_exit(void) { release_attributes_data(); - device_destroy(&firmware_attributes_class, MKDEV(0, 0)); - class_unregister(&firmware_attributes_class); + device_destroy(fw_attr_class, MKDEV(0, 0)); + fw_attributes_class_put(); exit_bios_attr_set_interface(); exit_bios_attr_pass_interface(); } diff --git a/drivers/platform/x86/dell/dell_rbu.c b/drivers/platform/x86/dell/dell_rbu.c index 085ad0a0d22e..e9f4b30dcafa 100644 --- a/drivers/platform/x86/dell/dell_rbu.c +++ b/drivers/platform/x86/dell/dell_rbu.c @@ -573,7 +573,7 @@ static ssize_t image_type_write(struct file *filp, struct kobject *kobj, if (!rbu_data.entry_created) { spin_unlock(&rbu_data.lock); req_firm_rc = request_firmware_nowait(THIS_MODULE, - FW_ACTION_NOHOTPLUG, "dell_rbu", + FW_ACTION_NOUEVENT, "dell_rbu", &rbu_device->dev, GFP_KERNEL, &context, callbackfn_rbu); if (req_firm_rc) { |