| /* |
| * Common functions for kernel modules using Dell SMBIOS |
| * |
| * Copyright (c) Red Hat <mjg@redhat.com> |
| * Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com> |
| * Copyright (c) 2014 Pali Rohár <pali.rohar@gmail.com> |
| * |
| * Based on documentation in the libsmbios package: |
| * Copyright (C) 2005-2014 Dell Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/capability.h> |
| #include <linux/dmi.h> |
| #include <linux/err.h> |
| #include <linux/mutex.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| #include "dell-smbios.h" |
| |
| static u32 da_supported_commands; |
| static int da_num_tokens; |
| static struct platform_device *platform_device; |
| static struct calling_interface_token *da_tokens; |
| static struct device_attribute *token_location_attrs; |
| static struct device_attribute *token_value_attrs; |
| static struct attribute **token_attrs; |
| static DEFINE_MUTEX(smbios_mutex); |
| |
| struct smbios_device { |
| struct list_head list; |
| struct device *device; |
| int (*call_fn)(struct calling_interface_buffer *arg); |
| }; |
| |
| struct smbios_call { |
| u32 need_capability; |
| int cmd_class; |
| int cmd_select; |
| }; |
| |
| /* calls that are whitelisted for given capabilities */ |
| static struct smbios_call call_whitelist[] = { |
| /* generally tokens are allowed, but may be further filtered or |
| * restricted by token blacklist or whitelist |
| */ |
| {CAP_SYS_ADMIN, CLASS_TOKEN_READ, SELECT_TOKEN_STD}, |
| {CAP_SYS_ADMIN, CLASS_TOKEN_READ, SELECT_TOKEN_AC}, |
| {CAP_SYS_ADMIN, CLASS_TOKEN_READ, SELECT_TOKEN_BAT}, |
| {CAP_SYS_ADMIN, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD}, |
| {CAP_SYS_ADMIN, CLASS_TOKEN_WRITE, SELECT_TOKEN_AC}, |
| {CAP_SYS_ADMIN, CLASS_TOKEN_WRITE, SELECT_TOKEN_BAT}, |
| /* used by userspace: fwupdate */ |
| {CAP_SYS_ADMIN, CLASS_ADMIN_PROP, SELECT_ADMIN_PROP}, |
| /* used by userspace: fwupd */ |
| {CAP_SYS_ADMIN, CLASS_INFO, SELECT_DOCK}, |
| {CAP_SYS_ADMIN, CLASS_FLASH_INTERFACE, SELECT_FLASH_INTERFACE}, |
| }; |
| |
| /* calls that are explicitly blacklisted */ |
| static struct smbios_call call_blacklist[] = { |
| {0x0000, 1, 7}, /* manufacturing use */ |
| {0x0000, 6, 5}, /* manufacturing use */ |
| {0x0000, 11, 3}, /* write once */ |
| {0x0000, 11, 7}, /* write once */ |
| {0x0000, 11, 11}, /* write once */ |
| {0x0000, 19, -1}, /* diagnostics */ |
| /* handled by kernel: dell-laptop */ |
| {0x0000, CLASS_INFO, SELECT_RFKILL}, |
| {0x0000, CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT}, |
| }; |
| |
| struct token_range { |
| u32 need_capability; |
| u16 min; |
| u16 max; |
| }; |
| |
| /* tokens that are whitelisted for given capabilities */ |
| static struct token_range token_whitelist[] = { |
| /* used by userspace: fwupdate */ |
| {CAP_SYS_ADMIN, CAPSULE_EN_TOKEN, CAPSULE_DIS_TOKEN}, |
| /* can indicate to userspace that WMI is needed */ |
| {0x0000, WSMT_EN_TOKEN, WSMT_DIS_TOKEN} |
| }; |
| |
| /* tokens that are explicitly blacklisted */ |
| static struct token_range token_blacklist[] = { |
| {0x0000, 0x0058, 0x0059}, /* ME use */ |
| {0x0000, 0x00CD, 0x00D0}, /* raid shadow copy */ |
| {0x0000, 0x013A, 0x01FF}, /* sata shadow copy */ |
| {0x0000, 0x0175, 0x0176}, /* write once */ |
| {0x0000, 0x0195, 0x0197}, /* diagnostics */ |
| {0x0000, 0x01DC, 0x01DD}, /* manufacturing use */ |
| {0x0000, 0x027D, 0x0284}, /* diagnostics */ |
| {0x0000, 0x02E3, 0x02E3}, /* manufacturing use */ |
| {0x0000, 0x02FF, 0x02FF}, /* manufacturing use */ |
| {0x0000, 0x0300, 0x0302}, /* manufacturing use */ |
| {0x0000, 0x0325, 0x0326}, /* manufacturing use */ |
| {0x0000, 0x0332, 0x0335}, /* fan control */ |
| {0x0000, 0x0350, 0x0350}, /* manufacturing use */ |
| {0x0000, 0x0363, 0x0363}, /* manufacturing use */ |
| {0x0000, 0x0368, 0x0368}, /* manufacturing use */ |
| {0x0000, 0x03F6, 0x03F7}, /* manufacturing use */ |
| {0x0000, 0x049E, 0x049F}, /* manufacturing use */ |
| {0x0000, 0x04A0, 0x04A3}, /* disagnostics */ |
| {0x0000, 0x04E6, 0x04E7}, /* manufacturing use */ |
| {0x0000, 0x4000, 0x7FFF}, /* internal BIOS use */ |
| {0x0000, 0x9000, 0x9001}, /* internal BIOS use */ |
| {0x0000, 0xA000, 0xBFFF}, /* write only */ |
| {0x0000, 0xEFF0, 0xEFFF}, /* internal BIOS use */ |
| /* handled by kernel: dell-laptop */ |
| {0x0000, BRIGHTNESS_TOKEN, BRIGHTNESS_TOKEN}, |
| {0x0000, KBD_LED_OFF_TOKEN, KBD_LED_AUTO_TOKEN}, |
| {0x0000, KBD_LED_AC_TOKEN, KBD_LED_AC_TOKEN}, |
| {0x0000, KBD_LED_AUTO_25_TOKEN, KBD_LED_AUTO_75_TOKEN}, |
| {0x0000, KBD_LED_AUTO_100_TOKEN, KBD_LED_AUTO_100_TOKEN}, |
| {0x0000, GLOBAL_MIC_MUTE_ENABLE, GLOBAL_MIC_MUTE_DISABLE}, |
| }; |
| |
| static LIST_HEAD(smbios_device_list); |
| |
| int dell_smbios_error(int value) |
| { |
| switch (value) { |
| case 0: /* Completed successfully */ |
| return 0; |
| case -1: /* Completed with error */ |
| return -EIO; |
| case -2: /* Function not supported */ |
| return -ENXIO; |
| default: /* Unknown error */ |
| return -EINVAL; |
| } |
| } |
| EXPORT_SYMBOL_GPL(dell_smbios_error); |
| |
| int dell_smbios_register_device(struct device *d, void *call_fn) |
| { |
| struct smbios_device *priv; |
| |
| priv = devm_kzalloc(d, sizeof(struct smbios_device), GFP_KERNEL); |
| if (!priv) |
| return -ENOMEM; |
| get_device(d); |
| priv->device = d; |
| priv->call_fn = call_fn; |
| mutex_lock(&smbios_mutex); |
| list_add_tail(&priv->list, &smbios_device_list); |
| mutex_unlock(&smbios_mutex); |
| dev_dbg(d, "Added device: %s\n", d->driver->name); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(dell_smbios_register_device); |
| |
| void dell_smbios_unregister_device(struct device *d) |
| { |
| struct smbios_device *priv; |
| |
| mutex_lock(&smbios_mutex); |
| list_for_each_entry(priv, &smbios_device_list, list) { |
| if (priv->device == d) { |
| list_del(&priv->list); |
| put_device(d); |
| break; |
| } |
| } |
| mutex_unlock(&smbios_mutex); |
| dev_dbg(d, "Remove device: %s\n", d->driver->name); |
| } |
| EXPORT_SYMBOL_GPL(dell_smbios_unregister_device); |
| |
| int dell_smbios_call_filter(struct device *d, |
| struct calling_interface_buffer *buffer) |
| { |
| u16 t = 0; |
| int i; |
| |
| /* can't make calls over 30 */ |
| if (buffer->cmd_class > 30) { |
| dev_dbg(d, "class too big: %u\n", buffer->cmd_class); |
| return -EINVAL; |
| } |
| |
| /* supported calls on the particular system */ |
| if (!(da_supported_commands & (1 << buffer->cmd_class))) { |
| dev_dbg(d, "invalid command, supported commands: 0x%8x\n", |
| da_supported_commands); |
| return -EINVAL; |
| } |
| |
| /* match against call blacklist */ |
| for (i = 0; i < ARRAY_SIZE(call_blacklist); i++) { |
| if (buffer->cmd_class != call_blacklist[i].cmd_class) |
| continue; |
| if (buffer->cmd_select != call_blacklist[i].cmd_select && |
| call_blacklist[i].cmd_select != -1) |
| continue; |
| dev_dbg(d, "blacklisted command: %u/%u\n", |
| buffer->cmd_class, buffer->cmd_select); |
| return -EINVAL; |
| } |
| |
| /* if a token call, find token ID */ |
| |
| if ((buffer->cmd_class == CLASS_TOKEN_READ || |
| buffer->cmd_class == CLASS_TOKEN_WRITE) && |
| buffer->cmd_select < 3) { |
| /* tokens enabled ? */ |
| if (!da_tokens) { |
| dev_dbg(d, "no token support on this system\n"); |
| return -EINVAL; |
| } |
| |
| /* find the matching token ID */ |
| for (i = 0; i < da_num_tokens; i++) { |
| if (da_tokens[i].location != buffer->input[0]) |
| continue; |
| t = da_tokens[i].tokenID; |
| break; |
| } |
| |
| /* token call; but token didn't exist */ |
| if (!t) { |
| dev_dbg(d, "token at location %04x doesn't exist\n", |
| buffer->input[0]); |
| return -EINVAL; |
| } |
| |
| /* match against token blacklist */ |
| for (i = 0; i < ARRAY_SIZE(token_blacklist); i++) { |
| if (!token_blacklist[i].min || !token_blacklist[i].max) |
| continue; |
| if (t >= token_blacklist[i].min && |
| t <= token_blacklist[i].max) |
| return -EINVAL; |
| } |
| |
| /* match against token whitelist */ |
| for (i = 0; i < ARRAY_SIZE(token_whitelist); i++) { |
| if (!token_whitelist[i].min || !token_whitelist[i].max) |
| continue; |
| if (t < token_whitelist[i].min || |
| t > token_whitelist[i].max) |
| continue; |
| if (!token_whitelist[i].need_capability || |
| capable(token_whitelist[i].need_capability)) { |
| dev_dbg(d, "whitelisted token: %x\n", t); |
| return 0; |
| } |
| |
| } |
| } |
| /* match against call whitelist */ |
| for (i = 0; i < ARRAY_SIZE(call_whitelist); i++) { |
| if (buffer->cmd_class != call_whitelist[i].cmd_class) |
| continue; |
| if (buffer->cmd_select != call_whitelist[i].cmd_select) |
| continue; |
| if (!call_whitelist[i].need_capability || |
| capable(call_whitelist[i].need_capability)) { |
| dev_dbg(d, "whitelisted capable command: %u/%u\n", |
| buffer->cmd_class, buffer->cmd_select); |
| return 0; |
| } |
| dev_dbg(d, "missing capability %d for %u/%u\n", |
| call_whitelist[i].need_capability, |
| buffer->cmd_class, buffer->cmd_select); |
| |
| } |
| |
| /* not in a whitelist, only allow processes with capabilities */ |
| if (capable(CAP_SYS_RAWIO)) { |
| dev_dbg(d, "Allowing %u/%u due to CAP_SYS_RAWIO\n", |
| buffer->cmd_class, buffer->cmd_select); |
| return 0; |
| } |
| |
| return -EACCES; |
| } |
| EXPORT_SYMBOL_GPL(dell_smbios_call_filter); |
| |
| int dell_smbios_call(struct calling_interface_buffer *buffer) |
| { |
| int (*call_fn)(struct calling_interface_buffer *) = NULL; |
| struct device *selected_dev = NULL; |
| struct smbios_device *priv; |
| int ret; |
| |
| mutex_lock(&smbios_mutex); |
| list_for_each_entry(priv, &smbios_device_list, list) { |
| if (!selected_dev || priv->device->id >= selected_dev->id) { |
| dev_dbg(priv->device, "Trying device ID: %d\n", |
| priv->device->id); |
| call_fn = priv->call_fn; |
| selected_dev = priv->device; |
| } |
| } |
| |
| if (!selected_dev) { |
| ret = -ENODEV; |
| pr_err("No dell-smbios drivers are loaded\n"); |
| goto out_smbios_call; |
| } |
| |
| ret = call_fn(buffer); |
| |
| out_smbios_call: |
| mutex_unlock(&smbios_mutex); |
| return ret; |
| } |
| EXPORT_SYMBOL_GPL(dell_smbios_call); |
| |
| struct calling_interface_token *dell_smbios_find_token(int tokenid) |
| { |
| int i; |
| |
| if (!da_tokens) |
| return NULL; |
| |
| for (i = 0; i < da_num_tokens; i++) { |
| if (da_tokens[i].tokenID == tokenid) |
| return &da_tokens[i]; |
| } |
| |
| return NULL; |
| } |
| EXPORT_SYMBOL_GPL(dell_smbios_find_token); |
| |
| static BLOCKING_NOTIFIER_HEAD(dell_laptop_chain_head); |
| |
| int dell_laptop_register_notifier(struct notifier_block *nb) |
| { |
| return blocking_notifier_chain_register(&dell_laptop_chain_head, nb); |
| } |
| EXPORT_SYMBOL_GPL(dell_laptop_register_notifier); |
| |
| int dell_laptop_unregister_notifier(struct notifier_block *nb) |
| { |
| return blocking_notifier_chain_unregister(&dell_laptop_chain_head, nb); |
| } |
| EXPORT_SYMBOL_GPL(dell_laptop_unregister_notifier); |
| |
| void dell_laptop_call_notifier(unsigned long action, void *data) |
| { |
| blocking_notifier_call_chain(&dell_laptop_chain_head, action, data); |
| } |
| EXPORT_SYMBOL_GPL(dell_laptop_call_notifier); |
| |
| static void __init parse_da_table(const struct dmi_header *dm) |
| { |
| /* Final token is a terminator, so we don't want to copy it */ |
| int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1; |
| struct calling_interface_token *new_da_tokens; |
| struct calling_interface_structure *table = |
| container_of(dm, struct calling_interface_structure, header); |
| |
| /* |
| * 4 bytes of table header, plus 7 bytes of Dell header |
| * plus at least 6 bytes of entry |
| */ |
| |
| if (dm->length < 17) |
| return; |
| |
| da_supported_commands = table->supportedCmds; |
| |
| new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) * |
| sizeof(struct calling_interface_token), |
| GFP_KERNEL); |
| |
| if (!new_da_tokens) |
| return; |
| da_tokens = new_da_tokens; |
| |
| memcpy(da_tokens+da_num_tokens, table->tokens, |
| sizeof(struct calling_interface_token) * tokens); |
| |
| da_num_tokens += tokens; |
| } |
| |
| static void zero_duplicates(struct device *dev) |
| { |
| int i, j; |
| |
| for (i = 0; i < da_num_tokens; i++) { |
| if (da_tokens[i].tokenID == 0) |
| continue; |
| for (j = i+1; j < da_num_tokens; j++) { |
| if (da_tokens[j].tokenID == 0) |
| continue; |
| if (da_tokens[i].tokenID == da_tokens[j].tokenID) { |
| dev_dbg(dev, "Zeroing dup token ID %x(%x/%x)\n", |
| da_tokens[j].tokenID, |
| da_tokens[j].location, |
| da_tokens[j].value); |
| da_tokens[j].tokenID = 0; |
| } |
| } |
| } |
| } |
| |
| static void __init find_tokens(const struct dmi_header *dm, void *dummy) |
| { |
| switch (dm->type) { |
| case 0xd4: /* Indexed IO */ |
| case 0xd5: /* Protected Area Type 1 */ |
| case 0xd6: /* Protected Area Type 2 */ |
| break; |
| case 0xda: /* Calling interface */ |
| parse_da_table(dm); |
| break; |
| } |
| } |
| |
| static int match_attribute(struct device *dev, |
| struct device_attribute *attr) |
| { |
| int i; |
| |
| for (i = 0; i < da_num_tokens * 2; i++) { |
| if (!token_attrs[i]) |
| continue; |
| if (strcmp(token_attrs[i]->name, attr->attr.name) == 0) |
| return i/2; |
| } |
| dev_dbg(dev, "couldn't match: %s\n", attr->attr.name); |
| return -EINVAL; |
| } |
| |
| static ssize_t location_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int i; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| i = match_attribute(dev, attr); |
| if (i > 0) |
| return scnprintf(buf, PAGE_SIZE, "%08x", da_tokens[i].location); |
| return 0; |
| } |
| |
| static ssize_t value_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int i; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| i = match_attribute(dev, attr); |
| if (i > 0) |
| return scnprintf(buf, PAGE_SIZE, "%08x", da_tokens[i].value); |
| return 0; |
| } |
| |
| static struct attribute_group smbios_attribute_group = { |
| .name = "tokens" |
| }; |
| |
| static struct platform_driver platform_driver = { |
| .driver = { |
| .name = "dell-smbios", |
| }, |
| }; |
| |
| static int build_tokens_sysfs(struct platform_device *dev) |
| { |
| char *location_name; |
| char *value_name; |
| size_t size; |
| int ret; |
| int i, j; |
| |
| /* (number of tokens + 1 for null terminated */ |
| size = sizeof(struct device_attribute) * (da_num_tokens + 1); |
| token_location_attrs = kzalloc(size, GFP_KERNEL); |
| if (!token_location_attrs) |
| return -ENOMEM; |
| token_value_attrs = kzalloc(size, GFP_KERNEL); |
| if (!token_value_attrs) |
| goto out_allocate_value; |
| |
| /* need to store both location and value + terminator*/ |
| size = sizeof(struct attribute *) * ((2 * da_num_tokens) + 1); |
| token_attrs = kzalloc(size, GFP_KERNEL); |
| if (!token_attrs) |
| goto out_allocate_attrs; |
| |
| for (i = 0, j = 0; i < da_num_tokens; i++) { |
| /* skip empty */ |
| if (da_tokens[i].tokenID == 0) |
| continue; |
| /* add location */ |
| location_name = kasprintf(GFP_KERNEL, "%04x_location", |
| da_tokens[i].tokenID); |
| if (location_name == NULL) |
| goto out_unwind_strings; |
| sysfs_attr_init(&token_location_attrs[i].attr); |
| token_location_attrs[i].attr.name = location_name; |
| token_location_attrs[i].attr.mode = 0444; |
| token_location_attrs[i].show = location_show; |
| token_attrs[j++] = &token_location_attrs[i].attr; |
| |
| /* add value */ |
| value_name = kasprintf(GFP_KERNEL, "%04x_value", |
| da_tokens[i].tokenID); |
| if (value_name == NULL) |
| goto loop_fail_create_value; |
| sysfs_attr_init(&token_value_attrs[i].attr); |
| token_value_attrs[i].attr.name = value_name; |
| token_value_attrs[i].attr.mode = 0444; |
| token_value_attrs[i].show = value_show; |
| token_attrs[j++] = &token_value_attrs[i].attr; |
| continue; |
| |
| loop_fail_create_value: |
| kfree(location_name); |
| goto out_unwind_strings; |
| } |
| smbios_attribute_group.attrs = token_attrs; |
| |
| ret = sysfs_create_group(&dev->dev.kobj, &smbios_attribute_group); |
| if (ret) |
| goto out_unwind_strings; |
| return 0; |
| |
| out_unwind_strings: |
| while (i--) { |
| kfree(token_location_attrs[i].attr.name); |
| kfree(token_value_attrs[i].attr.name); |
| } |
| kfree(token_attrs); |
| out_allocate_attrs: |
| kfree(token_value_attrs); |
| out_allocate_value: |
| kfree(token_location_attrs); |
| |
| return -ENOMEM; |
| } |
| |
| static void free_group(struct platform_device *pdev) |
| { |
| int i; |
| |
| sysfs_remove_group(&pdev->dev.kobj, |
| &smbios_attribute_group); |
| for (i = 0; i < da_num_tokens; i++) { |
| kfree(token_location_attrs[i].attr.name); |
| kfree(token_value_attrs[i].attr.name); |
| } |
| kfree(token_attrs); |
| kfree(token_value_attrs); |
| kfree(token_location_attrs); |
| } |
| |
| static int __init dell_smbios_init(void) |
| { |
| int ret, wmi, smm; |
| |
| if (!dmi_find_device(DMI_DEV_TYPE_OEM_STRING, "Dell System", NULL) && |
| !dmi_find_device(DMI_DEV_TYPE_OEM_STRING, "www.dell.com", NULL)) { |
| pr_err("Unable to run on non-Dell system\n"); |
| return -ENODEV; |
| } |
| |
| dmi_walk(find_tokens, NULL); |
| |
| ret = platform_driver_register(&platform_driver); |
| if (ret) |
| goto fail_platform_driver; |
| |
| platform_device = platform_device_alloc("dell-smbios", 0); |
| if (!platform_device) { |
| ret = -ENOMEM; |
| goto fail_platform_device_alloc; |
| } |
| ret = platform_device_add(platform_device); |
| if (ret) |
| goto fail_platform_device_add; |
| |
| /* register backends */ |
| wmi = init_dell_smbios_wmi(); |
| if (wmi) |
| pr_debug("Failed to initialize WMI backend: %d\n", wmi); |
| smm = init_dell_smbios_smm(); |
| if (smm) |
| pr_debug("Failed to initialize SMM backend: %d\n", smm); |
| if (wmi && smm) { |
| pr_err("No SMBIOS backends available (wmi: %d, smm: %d)\n", |
| wmi, smm); |
| ret = -ENODEV; |
| goto fail_create_group; |
| } |
| |
| if (da_tokens) { |
| /* duplicate tokens will cause problems building sysfs files */ |
| zero_duplicates(&platform_device->dev); |
| |
| ret = build_tokens_sysfs(platform_device); |
| if (ret) |
| goto fail_sysfs; |
| } |
| |
| return 0; |
| |
| fail_sysfs: |
| free_group(platform_device); |
| |
| fail_create_group: |
| platform_device_del(platform_device); |
| |
| fail_platform_device_add: |
| platform_device_put(platform_device); |
| |
| fail_platform_device_alloc: |
| platform_driver_unregister(&platform_driver); |
| |
| fail_platform_driver: |
| kfree(da_tokens); |
| return ret; |
| } |
| |
| static void __exit dell_smbios_exit(void) |
| { |
| exit_dell_smbios_wmi(); |
| exit_dell_smbios_smm(); |
| mutex_lock(&smbios_mutex); |
| if (platform_device) { |
| if (da_tokens) |
| free_group(platform_device); |
| platform_device_unregister(platform_device); |
| platform_driver_unregister(&platform_driver); |
| } |
| kfree(da_tokens); |
| mutex_unlock(&smbios_mutex); |
| } |
| |
| module_init(dell_smbios_init); |
| module_exit(dell_smbios_exit); |
| |
| MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); |
| MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>"); |
| MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>"); |
| MODULE_AUTHOR("Mario Limonciello <mario.limonciello@dell.com>"); |
| MODULE_DESCRIPTION("Common functions for kernel modules using Dell SMBIOS"); |
| MODULE_LICENSE("GPL"); |