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, 183 deletions

diff --git a/drivers/platform/x86/dell-smbios-smm.c b/drivers/platform/x86/dell-smbios-smm.c
deleted file mode 100644
index 97c52a839a3e..000000000000
--- a/drivers/platform/x86/dell-smbios-smm.c
+++ /dev/null
@@ -1,183 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *  SMI methods for use with dell-smbios
- *
- *  Copyright (c) Red Hat <mjg@redhat.com>
- *  Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
- *  Copyright (c) 2014 Pali Rohár <pali@kernel.org>
- *  Copyright (c) 2017 Dell Inc.
- */
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/dmi.h>
-#include <linux/gfp.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/platform_device.h>
-#include "dcdbas.h"
-#include "dell-smbios.h"
-
-static int da_command_address;
-static int da_command_code;
-static struct calling_interface_buffer *buffer;
-static struct platform_device *platform_device;
-static DEFINE_MUTEX(smm_mutex);
-
-static const struct dmi_system_id dell_device_table[] __initconst = {
-	{
-		.ident = "Dell laptop",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-			DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
-		},
-	},
-	{
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-			DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
-		},
-	},
-	{
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
-			DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /*Notebook*/
-		},
-	},
-	{
-		.ident = "Dell Computer Corporation",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
-			DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
-		},
-	},
-	{ }
-};
-MODULE_DEVICE_TABLE(dmi, dell_device_table);
-
-static void parse_da_table(const struct dmi_header *dm)
-{
-	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_command_address = table->cmdIOAddress;
-	da_command_code = table->cmdIOCode;
-}
-
-static void find_cmd_address(const struct dmi_header *dm, void *dummy)
-{
-	switch (dm->type) {
-	case 0xda: /* Calling interface */
-		parse_da_table(dm);
-		break;
-	}
-}
-
-static int dell_smbios_smm_call(struct calling_interface_buffer *input)
-{
-	struct smi_cmd command;
-	size_t size;
-
-	size = sizeof(struct calling_interface_buffer);
-	command.magic = SMI_CMD_MAGIC;
-	command.command_address = da_command_address;
-	command.command_code = da_command_code;
-	command.ebx = virt_to_phys(buffer);
-	command.ecx = 0x42534931;
-
-	mutex_lock(&smm_mutex);
-	memcpy(buffer, input, size);
-	dcdbas_smi_request(&command);
-	memcpy(input, buffer, size);
-	mutex_unlock(&smm_mutex);
-	return 0;
-}
-
-/* When enabled this indicates that SMM won't work */
-static bool test_wsmt_enabled(void)
-{
-	struct calling_interface_token *wsmt;
-
-	/* if token doesn't exist, SMM will work */
-	wsmt = dell_smbios_find_token(WSMT_EN_TOKEN);
-	if (!wsmt)
-		return false;
-
-	/* If token exists, try to access over SMM but set a dummy return.
-	 * - If WSMT disabled it will be overwritten by SMM
-	 * - If WSMT enabled then dummy value will remain
-	 */
-	buffer->cmd_class = CLASS_TOKEN_READ;
-	buffer->cmd_select = SELECT_TOKEN_STD;
-	memset(buffer, 0, sizeof(struct calling_interface_buffer));
-	buffer->input[0] = wsmt->location;
-	buffer->output[0] = 99;
-	dell_smbios_smm_call(buffer);
-	if (buffer->output[0] == 99)
-		return true;
-
-	return false;
-}
-
-int init_dell_smbios_smm(void)
-{
-	int ret;
-	/*
-	 * Allocate buffer below 4GB for SMI data--only 32-bit physical addr
-	 * is passed to SMI handler.
-	 */
-	buffer = (void *)__get_free_page(GFP_KERNEL | GFP_DMA32);
-	if (!buffer)
-		return -ENOMEM;
-
-	dmi_walk(find_cmd_address, NULL);
-
-	if (test_wsmt_enabled()) {
-		pr_debug("Disabling due to WSMT enabled\n");
-		ret = -ENODEV;
-		goto fail_wsmt;
-	}
-
-	platform_device = platform_device_alloc("dell-smbios", 1);
-	if (!platform_device) {
-		ret = -ENOMEM;
-		goto fail_platform_device_alloc;
-	}
-
-	ret = platform_device_add(platform_device);
-	if (ret)
-		goto fail_platform_device_add;
-
-	ret = dell_smbios_register_device(&platform_device->dev,
-					  &dell_smbios_smm_call);
-	if (ret)
-		goto fail_register;
-
-	return 0;
-
-fail_register:
-	platform_device_del(platform_device);
-
-fail_platform_device_add:
-	platform_device_put(platform_device);
-
-fail_wsmt:
-fail_platform_device_alloc:
-	free_page((unsigned long)buffer);
-	return ret;
-}
-
-void exit_dell_smbios_smm(void)
-{
-	if (platform_device) {
-		dell_smbios_unregister_device(&platform_device->dev);
-		platform_device_unregister(platform_device);
-		free_page((unsigned long)buffer);
-	}
-}