platform/x86: dell-smbios: Rename dell-smbios source to dell-smbios-base

This is being done to faciliate a later change to link all the dell-smbios
drivers together.

Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

1 files changed, 0 insertions, 629 deletions

diff --git a/drivers/platform/x86/dell-smbios.c b/drivers/platform/x86/dell-smbios.c
deleted file mode 100644
index 76b9d7545447..000000000000
--- a/drivers/platform/x86/dell-smbios.c
+++ /dev/null
@@ -1,629 +0,0 @@
-/*
- *  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) {
-		/* 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;
-
-	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(value_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:
-	for (i = i-1; i > 0; 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)
-{
-	const struct dmi_device *valid;
-	int ret;
-
-	valid = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, "Dell System", NULL);
-	if (!valid) {
-		pr_err("Unable to run on non-Dell system\n");
-		return -ENODEV;
-	}
-
-	dmi_walk(find_tokens, NULL);
-
-	if (!da_tokens)  {
-		pr_info("Unable to find dmi tokens\n");
-		return -ENODEV;
-	}
-
-	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;
-
-	/* duplicate tokens will cause problems building sysfs files */
-	zero_duplicates(&platform_device->dev);
-
-	ret = build_tokens_sysfs(platform_device);
-	if (ret)
-		goto fail_create_group;
-
-	return 0;
-
-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)
-{
-	mutex_lock(&smbios_mutex);
-	if (platform_device) {
-		free_group(platform_device);
-		platform_device_unregister(platform_device);
-		platform_driver_unregister(&platform_driver);
-	}
-	kfree(da_tokens);
-	mutex_unlock(&smbios_mutex);
-}
-
-subsys_initcall(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_DESCRIPTION("Common functions for kernel modules using Dell SMBIOS");
-MODULE_LICENSE("GPL");