platform/x86: Move all dell drivers to their own subdirectory

A user without a Dell system doesn't need to pick any of these
drivers.

Users with a Dell system can enable this submenu and all drivers
behind it will be enabled.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Link: https://lore.kernel.org/r/20210203195832.2950605-1-mario.limonciello@dell.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

1 files changed, 0 insertions, 631 deletions

diff --git a/drivers/platform/x86/dell-wmi-sysman/sysman.c b/drivers/platform/x86/dell-wmi-sysman/sysman.c
deleted file mode 100644
index cb81010ba1a2..000000000000
--- a/drivers/platform/x86/dell-wmi-sysman/sysman.c
+++ /dev/null
@@ -1,631 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Common methods for use with dell-wmi-sysman
- *
- *  Copyright (c) 2020 Dell Inc.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/fs.h>
-#include <linux/dmi.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/wmi.h>
-#include "dell-wmi-sysman.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),
-};
-
-/* reset bios to defaults */
-static const char * const reset_types[] = {"builtinsafe", "lastknowngood", "factory", "custom"};
-static int reset_option = -1;
-
-
-/**
- * populate_string_buffer() - populates a string buffer
- * @buffer: the start of the destination buffer
- * @buffer_len: length of the destination buffer
- * @str: the string to insert into buffer
- */
-ssize_t populate_string_buffer(char *buffer, size_t buffer_len, const char *str)
-{
-	u16 *length = (u16 *)buffer;
-	u16 *target = length + 1;
-	int ret;
-
-	ret = utf8s_to_utf16s(str, strlen(str), UTF16_HOST_ENDIAN,
-			      target, buffer_len - sizeof(u16));
-	if (ret < 0) {
-		dev_err(wmi_priv.class_dev, "UTF16 conversion failed\n");
-		return ret;
-	}
-
-	if ((ret * sizeof(u16)) > U16_MAX) {
-		dev_err(wmi_priv.class_dev, "Error string too long\n");
-		return -ERANGE;
-	}
-
-	*length = ret * sizeof(u16);
-	return sizeof(u16) + *length;
-}
-
-/**
- * calculate_string_buffer() - determines size of string buffer for use with BIOS communication
- * @str: the string to calculate based upon
- *
- */
-size_t calculate_string_buffer(const char *str)
-{
-	/* u16 length field + one UTF16 char for each input char */
-	return sizeof(u16) + strlen(str) * sizeof(u16);
-}
-
-/**
- * calculate_security_buffer() - determines size of security buffer for authentication scheme
- * @authentication: the authentication content
- *
- * Currently only supported type is Admin password
- */
-size_t calculate_security_buffer(char *authentication)
-{
-	if (strlen(authentication) > 0) {
-		return (sizeof(u32) * 2) + strlen(authentication) +
-			strlen(authentication) % 2;
-	}
-	return sizeof(u32) * 2;
-}
-
-/**
- * populate_security_buffer() - builds a security buffer for authentication scheme
- * @buffer: the buffer to populate
- * @authentication: the authentication content
- *
- * Currently only supported type is PLAIN TEXT
- */
-void populate_security_buffer(char *buffer, char *authentication)
-{
-	char *auth = buffer + sizeof(u32) * 2;
-	u32 *sectype = (u32 *) buffer;
-	u32 *seclen = sectype + 1;
-
-	*sectype = strlen(authentication) > 0 ? 1 : 0;
-	*seclen = strlen(authentication);
-
-	/* plain text */
-	if (strlen(authentication) > 0)
-		memcpy(auth, authentication, *seclen);
-}
-
-/**
- * map_wmi_error() - map errors from WMI methods to kernel error codes
- * @error_code: integer error code returned from Dell's firmware
- */
-int map_wmi_error(int error_code)
-{
-	switch (error_code) {
-	case 0:
-		/* success */
-		return 0;
-	case 1:
-		/* failed */
-		return -EIO;
-	case 2:
-		/* invalid parameter */
-		return -EINVAL;
-	case 3:
-		/* access denied */
-		return -EACCES;
-	case 4:
-		/* not supported */
-		return -EOPNOTSUPP;
-	case 5:
-		/* memory error */
-		return -ENOMEM;
-	case 6:
-		/* protocol error */
-		return -EPROTO;
-	}
-	/* unspecified error */
-	return -EIO;
-}
-
-/**
- * reset_bios_show() - sysfs implementaton for read reset_bios
- * @kobj: Kernel object for this attribute
- * @attr: Kernel object attribute
- * @buf: The buffer to display to userspace
- */
-static ssize_t reset_bios_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
-{
-	char *start = buf;
-	int i;
-
-	for (i = 0; i < MAX_TYPES; i++) {
-		if (i == reset_option)
-			buf += sprintf(buf, "[%s] ", reset_types[i]);
-		else
-			buf += sprintf(buf, "%s ", reset_types[i]);
-	}
-	buf += sprintf(buf, "\n");
-	return buf-start;
-}
-
-/**
- * reset_bios_store() - sysfs implementaton for write reset_bios
- * @kobj: Kernel object for this attribute
- * @attr: Kernel object attribute
- * @buf: The buffer from userspace
- * @count: the size of the buffer from userspace
- */
-static ssize_t reset_bios_store(struct kobject *kobj,
-				struct kobj_attribute *attr, const char *buf, size_t count)
-{
-	int type = sysfs_match_string(reset_types, buf);
-	int ret;
-
-	if (type < 0)
-		return type;
-
-	ret = set_bios_defaults(type);
-	pr_debug("reset all attributes request type %d: %d\n", type, ret);
-	if (!ret) {
-		reset_option = type;
-		ret = count;
-	}
-
-	return ret;
-}
-
-/**
- * pending_reboot_show() - sysfs implementaton for read pending_reboot
- * @kobj: Kernel object for this attribute
- * @attr: Kernel object attribute
- * @buf: The buffer to display to userspace
- *
- * Stores default value as 0
- * When current_value is changed this attribute is set to 1 to notify reboot may be required
- */
-static ssize_t pending_reboot_show(struct kobject *kobj, struct kobj_attribute *attr,
-				   char *buf)
-{
-	return sprintf(buf, "%d\n", wmi_priv.pending_changes);
-}
-
-static struct kobj_attribute reset_bios = __ATTR_RW(reset_bios);
-static struct kobj_attribute pending_reboot = __ATTR_RO(pending_reboot);
-
-
-/**
- * create_attributes_level_sysfs_files() - Creates reset_bios and
- * pending_reboot attributes
- */
-static int create_attributes_level_sysfs_files(void)
-{
-	int ret = sysfs_create_file(&wmi_priv.main_dir_kset->kobj, &reset_bios.attr);
-
-	if (ret) {
-		pr_debug("could not create reset_bios file\n");
-		return ret;
-	}
-
-	ret = sysfs_create_file(&wmi_priv.main_dir_kset->kobj, &pending_reboot.attr);
-	if (ret) {
-		pr_debug("could not create changing_pending_reboot file\n");
-		sysfs_remove_file(&wmi_priv.main_dir_kset->kobj, &reset_bios.attr);
-	}
-	return ret;
-}
-
-static void release_reset_bios_data(void)
-{
-	sysfs_remove_file(&wmi_priv.main_dir_kset->kobj, &reset_bios.attr);
-	sysfs_remove_file(&wmi_priv.main_dir_kset->kobj, &pending_reboot.attr);
-}
-
-static ssize_t wmi_sysman_attr_show(struct kobject *kobj, struct attribute *attr,
-				    char *buf)
-{
-	struct kobj_attribute *kattr;
-	ssize_t ret = -EIO;
-
-	kattr = container_of(attr, struct kobj_attribute, attr);
-	if (kattr->show)
-		ret = kattr->show(kobj, kattr, buf);
-	return ret;
-}
-
-static ssize_t wmi_sysman_attr_store(struct kobject *kobj, struct attribute *attr,
-				     const char *buf, size_t count)
-{
-	struct kobj_attribute *kattr;
-	ssize_t ret = -EIO;
-
-	kattr = container_of(attr, struct kobj_attribute, attr);
-	if (kattr->store)
-		ret = kattr->store(kobj, kattr, buf, count);
-	return ret;
-}
-
-static const struct sysfs_ops wmi_sysman_kobj_sysfs_ops = {
-	.show	= wmi_sysman_attr_show,
-	.store	= wmi_sysman_attr_store,
-};
-
-static void attr_name_release(struct kobject *kobj)
-{
-	kfree(kobj);
-}
-
-static struct kobj_type attr_name_ktype = {
-	.release	= attr_name_release,
-	.sysfs_ops	= &wmi_sysman_kobj_sysfs_ops,
-};
-
-/**
- * strlcpy_attr - Copy a length-limited, NULL-terminated string with bound checks
- * @dest: Where to copy the string to
- * @src: Where to copy the string from
- */
-void strlcpy_attr(char *dest, char *src)
-{
-	size_t len = strlen(src) + 1;
-
-	if (len > 1 && len <= MAX_BUFF)
-		strlcpy(dest, src, len);
-
-	/*len can be zero because any property not-applicable to attribute can
-	 * be empty so check only for too long buffers and log error
-	 */
-	if (len > MAX_BUFF)
-		pr_err("Source string returned from BIOS is out of bound!\n");
-}
-
-/**
- * get_wmiobj_pointer() - Get Content of WMI block for particular instance
- * @instance_id: WMI instance ID
- * @guid_string: WMI GUID (in str form)
- *
- * Fetches the content for WMI block (instance_id) under GUID (guid_string)
- * Caller must kfree the return
- */
-union acpi_object *get_wmiobj_pointer(int instance_id, const char *guid_string)
-{
-	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
-	acpi_status status;
-
-	status = wmi_query_block(guid_string, instance_id, &out);
-
-	return ACPI_SUCCESS(status) ? (union acpi_object *)out.pointer : NULL;
-}
-
-/**
- * get_instance_count() - Compute total number of instances under guid_string
- * @guid_string: WMI GUID (in string form)
- */
-int get_instance_count(const char *guid_string)
-{
-	union acpi_object *wmi_obj = NULL;
-	int i = 0;
-
-	do {
-		kfree(wmi_obj);
-		wmi_obj = get_wmiobj_pointer(i, guid_string);
-		i++;
-	} while (wmi_obj);
-
-	return (i-1);
-}
-
-/**
- * alloc_attributes_data() - Allocate attributes data for a particular type
- * @attr_type: Attribute type to allocate
- */
-static int alloc_attributes_data(int attr_type)
-{
-	int retval = 0;
-
-	switch (attr_type) {
-	case ENUM:
-		retval = alloc_enum_data();
-		break;
-	case INT:
-		retval = alloc_int_data();
-		break;
-	case STR:
-		retval = alloc_str_data();
-		break;
-	case PO:
-		retval = alloc_po_data();
-		break;
-	default:
-		break;
-	}
-
-	return retval;
-}
-
-/**
- * destroy_attribute_objs() - Free a kset of kobjects
- * @kset: The kset to destroy
- *
- * Fress kobjects created for each attribute_name under attribute type kset
- */
-static void destroy_attribute_objs(struct kset *kset)
-{
-	struct kobject *pos, *next;
-
-	list_for_each_entry_safe(pos, next, &kset->list, entry) {
-		kobject_put(pos);
-	}
-}
-
-/**
- * release_attributes_data() - Clean-up all sysfs directories and files created
- */
-static void release_attributes_data(void)
-{
-	release_reset_bios_data();
-
-	mutex_lock(&wmi_priv.mutex);
-	exit_enum_attributes();
-	exit_int_attributes();
-	exit_str_attributes();
-	exit_po_attributes();
-	if (wmi_priv.authentication_dir_kset) {
-		destroy_attribute_objs(wmi_priv.authentication_dir_kset);
-		kset_unregister(wmi_priv.authentication_dir_kset);
-		wmi_priv.authentication_dir_kset = NULL;
-	}
-	if (wmi_priv.main_dir_kset) {
-		destroy_attribute_objs(wmi_priv.main_dir_kset);
-		kset_unregister(wmi_priv.main_dir_kset);
-	}
-	mutex_unlock(&wmi_priv.mutex);
-
-}
-
-/**
- * init_bios_attributes() - Initialize all attributes for a type
- * @attr_type: The attribute type to initialize
- * @guid: The WMI GUID associated with this type to initialize
- *
- * Initialiaze all 4 types of attributes enumeration, integer, string and password object.
- * Populates each attrbute typ's respective properties under sysfs files
- */
-static int init_bios_attributes(int attr_type, const char *guid)
-{
-	struct kobject *attr_name_kobj; //individual attribute names
-	union acpi_object *obj = NULL;
-	union acpi_object *elements;
-	struct kset *tmp_set;
-
-	/* instance_id needs to be reset for each type GUID
-	 * also, instance IDs are unique within GUID but not across
-	 */
-	int instance_id = 0;
-	int retval = 0;
-
-	retval = alloc_attributes_data(attr_type);
-	if (retval)
-		return retval;
-	/* need to use specific instance_id and guid combination to get right data */
-	obj = get_wmiobj_pointer(instance_id, guid);
-	if (!obj || obj->type != ACPI_TYPE_PACKAGE)
-		return -ENODEV;
-	elements = obj->package.elements;
-
-	mutex_lock(&wmi_priv.mutex);
-	while (elements) {
-		/* sanity checking */
-		if (elements[ATTR_NAME].type != ACPI_TYPE_STRING) {
-			pr_debug("incorrect element type\n");
-			goto nextobj;
-		}
-		if (strlen(elements[ATTR_NAME].string.pointer) == 0) {
-			pr_debug("empty attribute found\n");
-			goto nextobj;
-		}
-		if (attr_type == PO)
-			tmp_set = wmi_priv.authentication_dir_kset;
-		else
-			tmp_set = wmi_priv.main_dir_kset;
-
-		if (kset_find_obj(tmp_set, elements[ATTR_NAME].string.pointer)) {
-			pr_debug("duplicate attribute name found - %s\n",
-				elements[ATTR_NAME].string.pointer);
-			goto nextobj;
-		}
-
-		/* build attribute */
-		attr_name_kobj = kzalloc(sizeof(*attr_name_kobj), GFP_KERNEL);
-		if (!attr_name_kobj) {
-			retval = -ENOMEM;
-			goto err_attr_init;
-		}
-
-		attr_name_kobj->kset = tmp_set;
-
-		retval = kobject_init_and_add(attr_name_kobj, &attr_name_ktype, NULL, "%s",
-						elements[ATTR_NAME].string.pointer);
-		if (retval) {
-			kobject_put(attr_name_kobj);
-			goto err_attr_init;
-		}
-
-		/* enumerate all of this attribute */
-		switch (attr_type) {
-		case ENUM:
-			retval = populate_enum_data(elements, instance_id, attr_name_kobj);
-			break;
-		case INT:
-			retval = populate_int_data(elements, instance_id, attr_name_kobj);
-			break;
-		case STR:
-			retval = populate_str_data(elements, instance_id, attr_name_kobj);
-			break;
-		case PO:
-			retval = populate_po_data(elements, instance_id, attr_name_kobj);
-			break;
-		default:
-			break;
-		}
-
-		if (retval) {
-			pr_debug("failed to populate %s\n",
-				elements[ATTR_NAME].string.pointer);
-			goto err_attr_init;
-		}
-
-nextobj:
-		kfree(obj);
-		instance_id++;
-		obj = get_wmiobj_pointer(instance_id, guid);
-		elements = obj ? obj->package.elements : NULL;
-	}
-
-	mutex_unlock(&wmi_priv.mutex);
-	return 0;
-
-err_attr_init:
-	mutex_unlock(&wmi_priv.mutex);
-	release_attributes_data();
-	kfree(obj);
-	return retval;
-}
-
-static int __init sysman_init(void)
-{
-	int ret = 0;
-
-	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;
-	}
-
-	ret = init_bios_attr_set_interface();
-	if (ret || !wmi_priv.bios_attr_wdev) {
-		pr_debug("failed to initialize set interface\n");
-		goto fail_set_interface;
-	}
-
-	ret = init_bios_attr_pass_interface();
-	if (ret || !wmi_priv.password_attr_wdev) {
-		pr_debug("failed to initialize pass interface\n");
-		goto fail_pass_interface;
-	}
-
-	ret = class_register(&firmware_attributes_class);
-	if (ret)
-		goto fail_class;
-
-	wmi_priv.class_dev = device_create(&firmware_attributes_class, NULL, MKDEV(0, 0),
-				  NULL, "%s", DRIVER_NAME);
-	if (IS_ERR(wmi_priv.class_dev)) {
-		ret = PTR_ERR(wmi_priv.class_dev);
-		goto fail_classdev;
-	}
-
-	wmi_priv.main_dir_kset = kset_create_and_add("attributes", NULL,
-						     &wmi_priv.class_dev->kobj);
-	if (!wmi_priv.main_dir_kset) {
-		ret = -ENOMEM;
-		goto fail_main_kset;
-	}
-
-	wmi_priv.authentication_dir_kset = kset_create_and_add("authentication", NULL,
-								&wmi_priv.class_dev->kobj);
-	if (!wmi_priv.authentication_dir_kset) {
-		ret = -ENOMEM;
-		goto fail_authentication_kset;
-	}
-
-	ret = create_attributes_level_sysfs_files();
-	if (ret) {
-		pr_debug("could not create reset BIOS attribute\n");
-		goto fail_reset_bios;
-	}
-
-	ret = init_bios_attributes(ENUM, DELL_WMI_BIOS_ENUMERATION_ATTRIBUTE_GUID);
-	if (ret) {
-		pr_debug("failed to populate enumeration type attributes\n");
-		goto fail_create_group;
-	}
-
-	ret = init_bios_attributes(INT, DELL_WMI_BIOS_INTEGER_ATTRIBUTE_GUID);
-	if (ret) {
-		pr_debug("failed to populate integer type attributes\n");
-		goto fail_create_group;
-	}
-
-	ret = init_bios_attributes(STR, DELL_WMI_BIOS_STRING_ATTRIBUTE_GUID);
-	if (ret) {
-		pr_debug("failed to populate string type attributes\n");
-		goto fail_create_group;
-	}
-
-	ret = init_bios_attributes(PO, DELL_WMI_BIOS_PASSOBJ_ATTRIBUTE_GUID);
-	if (ret) {
-		pr_debug("failed to populate pass object type attributes\n");
-		goto fail_create_group;
-	}
-
-	return 0;
-
-fail_create_group:
-	release_attributes_data();
-
-fail_reset_bios:
-	if (wmi_priv.authentication_dir_kset) {
-		kset_unregister(wmi_priv.authentication_dir_kset);
-		wmi_priv.authentication_dir_kset = NULL;
-	}
-
-fail_authentication_kset:
-	if (wmi_priv.main_dir_kset) {
-		kset_unregister(wmi_priv.main_dir_kset);
-		wmi_priv.main_dir_kset = NULL;
-	}
-
-fail_main_kset:
-	device_destroy(&firmware_attributes_class, MKDEV(0, 0));
-
-fail_classdev:
-	class_unregister(&firmware_attributes_class);
-
-fail_class:
-	exit_bios_attr_pass_interface();
-
-fail_pass_interface:
-	exit_bios_attr_set_interface();
-
-fail_set_interface:
-	return ret;
-}
-
-static void __exit sysman_exit(void)
-{
-	release_attributes_data();
-	device_destroy(&firmware_attributes_class, MKDEV(0, 0));
-	class_unregister(&firmware_attributes_class);
-	exit_bios_attr_set_interface();
-	exit_bios_attr_pass_interface();
-}
-
-module_init(sysman_init);
-module_exit(sysman_exit);
-
-MODULE_AUTHOR("Mario Limonciello <mario.limonciello@dell.com>");
-MODULE_AUTHOR("Prasanth Ksr <prasanth.ksr@dell.com>");
-MODULE_AUTHOR("Divya Bharathi <divya.bharathi@dell.com>");
-MODULE_DESCRIPTION("Dell platform setting control interface");
-MODULE_LICENSE("GPL");