sfi: Remove framework for deprecated firmware

SFI-based platforms are gone. So does this framework.

This removes mention of SFI through the drivers and other code as well.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

7 files changed, 5 insertions, 858 deletions

diff --git a/drivers/Makefile b/drivers/Makefile
index fd11b9ac4cc3..b2af1514a6b3 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -27,7 +27,7 @@ obj-y				+= idle/
 obj-y				+= char/ipmi/
 
 obj-$(CONFIG_ACPI)		+= acpi/
-obj-$(CONFIG_SFI)		+= sfi/
+
 # PnP must come after ACPI since it will eventually need to check if acpi
 # was used and do nothing if so
 obj-$(CONFIG_PNP)		+= pnp/
diff --git a/drivers/platform/x86/intel_scu_pcidrv.c b/drivers/platform/x86/intel_scu_pcidrv.c
index 8c5fd8240da9..80abc708e4f2 100644
--- a/drivers/platform/x86/intel_scu_pcidrv.c
+++ b/drivers/platform/x86/intel_scu_pcidrv.c
@@ -17,7 +17,6 @@
 static int intel_scu_pci_probe(struct pci_dev *pdev,
 			       const struct pci_device_id *id)
 {
-	void (*setup_fn)(void) = (void (*)(void))id->driver_data;
 	struct intel_scu_ipc_data scu_data = {};
 	struct intel_scu_ipc_dev *scu;
 	int ret;
@@ -30,27 +29,14 @@ static int intel_scu_pci_probe(struct pci_dev *pdev,
 	scu_data.irq = pdev->irq;
 
 	scu = intel_scu_ipc_register(&pdev->dev, &scu_data);
-	if (IS_ERR(scu))
-		return PTR_ERR(scu);
-
-	if (setup_fn)
-		setup_fn();
-	return 0;
-}
-
-static void intel_mid_scu_setup(void)
-{
-	intel_scu_devices_create();
+	return PTR_ERR_OR_ZERO(scu);
 }
 
 static const struct pci_device_id pci_ids[] = {
-	{ PCI_VDEVICE(INTEL, 0x080e),
-	  .driver_data = (kernel_ulong_t)intel_mid_scu_setup },
-	{ PCI_VDEVICE(INTEL, 0x08ea),
-	  .driver_data = (kernel_ulong_t)intel_mid_scu_setup },
+	{ PCI_VDEVICE(INTEL, 0x080e) },
+	{ PCI_VDEVICE(INTEL, 0x08ea) },
 	{ PCI_VDEVICE(INTEL, 0x0a94) },
-	{ PCI_VDEVICE(INTEL, 0x11a0),
-	  .driver_data = (kernel_ulong_t)intel_mid_scu_setup },
+	{ PCI_VDEVICE(INTEL, 0x11a0) },
 	{ PCI_VDEVICE(INTEL, 0x1a94) },
 	{ PCI_VDEVICE(INTEL, 0x5a94) },
 	{}
diff --git a/drivers/sfi/Kconfig b/drivers/sfi/Kconfig
deleted file mode 100644
index 3d0b64db214e..000000000000
--- a/drivers/sfi/Kconfig
+++ /dev/null
@@ -1,18 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# SFI Configuration
-#
-
-menuconfig SFI
-	bool "SFI (Simple Firmware Interface) Support"
-	help
-	The Simple Firmware Interface (SFI) provides a lightweight method
-	for platform firmware to pass information to the operating system
-	via static tables in memory.  Kernel SFI support is required to
-	boot on SFI-only platforms.  Currently, all SFI-only platforms are
-	based on the 2nd generation Intel Atom processor platform,
-	code-named Moorestown.
-
-	For more information, see http://simplefirmware.org
-
-	Say 'Y' here to enable the kernel to boot on SFI-only platforms.
diff --git a/drivers/sfi/Makefile b/drivers/sfi/Makefile
deleted file mode 100644
index ca9436b12386..000000000000
--- a/drivers/sfi/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-obj-y	+= sfi_acpi.o
-obj-y	+= sfi_core.o
-
diff --git a/drivers/sfi/sfi_acpi.c b/drivers/sfi/sfi_acpi.c
deleted file mode 100644
index d277b36eb389..000000000000
--- a/drivers/sfi/sfi_acpi.c
+++ /dev/null
@@ -1,214 +0,0 @@
-/* sfi_acpi.c Simple Firmware Interface - ACPI extensions */
-
-/*
-
-  This file is provided under a dual BSD/GPLv2 license.  When using or
-  redistributing this file, you may do so under either license.
-
-  GPL LICENSE SUMMARY
-
-  Copyright(c) 2009 Intel Corporation. All rights reserved.
-
-  This program is free software; you can redistribute it and/or modify
-  it under the terms of version 2 of the GNU General Public License as
-  published by the Free Software Foundation.
-
-  This program is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-  General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program; if not, write to the Free Software
-  Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
-  The full GNU General Public License is included in this distribution
-  in the file called LICENSE.GPL.
-
-  BSD LICENSE
-
-  Copyright(c) 2009 Intel Corporation. All rights reserved.
-
-  Redistribution and use in source and binary forms, with or without
-  modification, are permitted provided that the following conditions
-  are met:
-
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above copyright
-      notice, this list of conditions and the following disclaimer in
-      the documentation and/or other materials provided with the
-      distribution.
-    * Neither the name of Intel Corporation nor the names of its
-      contributors may be used to endorse or promote products derived
-      from this software without specific prior written permission.
-
-  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-*/
-
-#define KMSG_COMPONENT "SFI"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
-
-#include <linux/kernel.h>
-#include <linux/sfi_acpi.h>
-#include "sfi_core.h"
-
-/*
- * SFI can access ACPI-defined tables via an optional ACPI XSDT.
- *
- * This allows re-use, and avoids re-definition, of standard tables.
- * For example, the "MCFG" table is defined by PCI, reserved by ACPI,
- * and is expected to be present many SFI-only systems.
- */
-
-static struct acpi_table_xsdt *xsdt_va __read_mostly;
-
-#define XSDT_GET_NUM_ENTRIES(ptable, entry_type) \
-	((ptable->header.length - sizeof(struct acpi_table_header)) / \
-	(sizeof(entry_type)))
-
-static inline struct sfi_table_header *acpi_to_sfi_th(
-				struct acpi_table_header *th)
-{
-	return (struct sfi_table_header *)th;
-}
-
-static inline struct acpi_table_header *sfi_to_acpi_th(
-				struct sfi_table_header *th)
-{
-	return (struct acpi_table_header *)th;
-}
-
-/*
- * sfi_acpi_parse_xsdt()
- *
- * Parse the ACPI XSDT for later access by sfi_acpi_table_parse().
- */
-static int __init sfi_acpi_parse_xsdt(struct sfi_table_header *th)
-{
-	struct sfi_table_key key = SFI_ANY_KEY;
-	int tbl_cnt, i;
-	void *ret;
-
-	xsdt_va = (struct acpi_table_xsdt *)th;
-	tbl_cnt = XSDT_GET_NUM_ENTRIES(xsdt_va, u64);
-	for (i = 0; i < tbl_cnt; i++) {
-		ret = sfi_check_table(xsdt_va->table_offset_entry[i], &key);
-		if (IS_ERR(ret)) {
-			disable_sfi();
-			return -1;
-		}
-	}
-
-	return 0;
-}
-
-int __init sfi_acpi_init(void)
-{
-	struct sfi_table_key xsdt_key = { .sig = SFI_SIG_XSDT };
-
-	sfi_table_parse(SFI_SIG_XSDT, NULL, NULL, sfi_acpi_parse_xsdt);
-
-	/* Only call the get_table to keep the table mapped */
-	xsdt_va = (struct acpi_table_xsdt *)sfi_get_table(&xsdt_key);
-	return 0;
-}
-
-static struct acpi_table_header *sfi_acpi_get_table(struct sfi_table_key *key)
-{
-	u32 tbl_cnt, i;
-	void *ret;
-
-	tbl_cnt = XSDT_GET_NUM_ENTRIES(xsdt_va, u64);
-	for (i = 0; i < tbl_cnt; i++) {
-		ret = sfi_check_table(xsdt_va->table_offset_entry[i], key);
-		if (!IS_ERR(ret) && ret)
-			return sfi_to_acpi_th(ret);
-	}
-
-	return NULL;
-}
-
-static void sfi_acpi_put_table(struct acpi_table_header *table)
-{
-	sfi_put_table(acpi_to_sfi_th(table));
-}
-
-/*
- * sfi_acpi_table_parse()
- *
- * Find specified table in XSDT, run handler on it and return its return value
- */
-int sfi_acpi_table_parse(char *signature, char *oem_id, char *oem_table_id,
-			int(*handler)(struct acpi_table_header *))
-{
-	struct acpi_table_header *table = NULL;
-	struct sfi_table_key key;
-	int ret = 0;
-
-	if (sfi_disabled)
-		return -1;
-
-	key.sig = signature;
-	key.oem_id = oem_id;
-	key.oem_table_id = oem_table_id;
-
-	table = sfi_acpi_get_table(&key);
-	if (!table)
-		return -EINVAL;
-
-	ret = handler(table);
-	sfi_acpi_put_table(table);
-	return ret;
-}
-
-static ssize_t sfi_acpi_table_show(struct file *filp, struct kobject *kobj,
-			       struct bin_attribute *bin_attr, char *buf,
-			       loff_t offset, size_t count)
-{
-	struct sfi_table_attr *tbl_attr =
-	    container_of(bin_attr, struct sfi_table_attr, attr);
-	struct acpi_table_header *th = NULL;
-	struct sfi_table_key key;
-	ssize_t cnt;
-
-	key.sig = tbl_attr->name;
-	key.oem_id = NULL;
-	key.oem_table_id = NULL;
-
-	th = sfi_acpi_get_table(&key);
-	if (!th)
-		return 0;
-
-	cnt =  memory_read_from_buffer(buf, count, &offset,
-					th, th->length);
-	sfi_acpi_put_table(th);
-
-	return cnt;
-}
-
-
-void __init sfi_acpi_sysfs_init(void)
-{
-	u32 tbl_cnt, i;
-	struct sfi_table_attr *tbl_attr;
-
-	tbl_cnt = XSDT_GET_NUM_ENTRIES(xsdt_va, u64);
-	for (i = 0; i < tbl_cnt; i++) {
-		tbl_attr =
-			sfi_sysfs_install_table(xsdt_va->table_offset_entry[i]);
-		tbl_attr->attr.read = sfi_acpi_table_show;
-	}
-
-	return;
-}
diff --git a/drivers/sfi/sfi_core.c b/drivers/sfi/sfi_core.c
deleted file mode 100644
index a5136901dd8a..000000000000
--- a/drivers/sfi/sfi_core.c
+++ /dev/null
@@ -1,522 +0,0 @@
-/* sfi_core.c Simple Firmware Interface - core internals */
-
-/*
-
-  This file is provided under a dual BSD/GPLv2 license.  When using or
-  redistributing this file, you may do so under either license.
-
-  GPL LICENSE SUMMARY
-
-  Copyright(c) 2009 Intel Corporation. All rights reserved.
-
-  This program is free software; you can redistribute it and/or modify
-  it under the terms of version 2 of the GNU General Public License as
-  published by the Free Software Foundation.
-
-  This program is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-  General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program; if not, write to the Free Software
-  Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
-  The full GNU General Public License is included in this distribution
-  in the file called LICENSE.GPL.
-
-  BSD LICENSE
-
-  Copyright(c) 2009 Intel Corporation. All rights reserved.
-
-  Redistribution and use in source and binary forms, with or without
-  modification, are permitted provided that the following conditions
-  are met:
-
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above copyright
-      notice, this list of conditions and the following disclaimer in
-      the documentation and/or other materials provided with the
-      distribution.
-    * Neither the name of Intel Corporation nor the names of its
-      contributors may be used to endorse or promote products derived
-      from this software without specific prior written permission.
-
-  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-*/
-
-#define KMSG_COMPONENT "SFI"
-#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
-
-#include <linux/memblock.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/acpi.h>
-#include <linux/init.h>
-#include <linux/sfi.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-
-#include "sfi_core.h"
-
-#define ON_SAME_PAGE(addr1, addr2) \
-	(((unsigned long)(addr1) & PAGE_MASK) == \
-	((unsigned long)(addr2) & PAGE_MASK))
-#define TABLE_ON_PAGE(page, table, size) (ON_SAME_PAGE(page, table) && \
-				ON_SAME_PAGE(page, table + size))
-
-int sfi_disabled __read_mostly;
-EXPORT_SYMBOL(sfi_disabled);
-
-static u64 syst_pa __read_mostly;
-static struct sfi_table_simple *syst_va __read_mostly;
-
-/*
- * FW creates and saves the SFI tables in memory. When these tables get
- * used, they may need to be mapped to virtual address space, and the mapping
- * can happen before or after the memremap() is ready, so a flag is needed
- * to indicating this
- */
-static u32 sfi_use_memremap __read_mostly;
-
-/*
- * sfi_un/map_memory calls early_memremap/memunmap which is a __init function
- * and introduces section mismatch. So use __ref to make it calm.
- */
-static void __iomem * __ref sfi_map_memory(u64 phys, u32 size)
-{
-	if (!phys || !size)
-		return NULL;
-
-	if (sfi_use_memremap)
-		return memremap(phys, size, MEMREMAP_WB);
-	else
-		return early_memremap(phys, size);
-}
-
-static void __ref sfi_unmap_memory(void __iomem *virt, u32 size)
-{
-	if (!virt || !size)
-		return;
-
-	if (sfi_use_memremap)
-		memunmap(virt);
-	else
-		early_memunmap(virt, size);
-}
-
-static void sfi_print_table_header(unsigned long long pa,
-				struct sfi_table_header *header)
-{
-	pr_info("%4.4s %llX, %04X (v%d %6.6s %8.8s)\n",
-		header->sig, pa,
-		header->len, header->rev, header->oem_id,
-		header->oem_table_id);
-}
-
-/*
- * sfi_verify_table()
- * Sanity check table lengh, calculate checksum
- */
-static int sfi_verify_table(struct sfi_table_header *table)
-{
-
-	u8 checksum = 0;
-	u8 *puchar = (u8 *)table;
-	u32 length = table->len;
-
-	/* Sanity check table length against arbitrary 1MB limit */
-	if (length > 0x100000) {
-		pr_err("Invalid table length 0x%x\n", length);
-		return -1;
-	}
-
-	while (length--)
-		checksum += *puchar++;
-
-	if (checksum) {
-		pr_err("Checksum %2.2X should be %2.2X\n",
-			table->csum, table->csum - checksum);
-		return -1;
-	}
-	return 0;
-}
-
-/*
- * sfi_map_table()
- *
- * Return address of mapped table
- * Check for common case that we can re-use mapping to SYST,
- * which requires syst_pa, syst_va to be initialized.
- */
-static struct sfi_table_header *sfi_map_table(u64 pa)
-{
-	struct sfi_table_header *th;
-	u32 length;
-
-	if (!TABLE_ON_PAGE(syst_pa, pa, sizeof(struct sfi_table_header)))
-		th = sfi_map_memory(pa, sizeof(struct sfi_table_header));
-	else
-		th = (void *)syst_va + (pa - syst_pa);
-
-	 /* If table fits on same page as its header, we are done */
-	if (TABLE_ON_PAGE(th, th, th->len))
-		return th;
-
-	/* Entire table does not fit on same page as SYST */
-	length = th->len;
-	if (!TABLE_ON_PAGE(syst_pa, pa, sizeof(struct sfi_table_header)))
-		sfi_unmap_memory(th, sizeof(struct sfi_table_header));
-
-	return sfi_map_memory(pa, length);
-}
-
-/*
- * sfi_unmap_table()
- *
- * Undoes effect of sfi_map_table() by unmapping table
- * if it did not completely fit on same page as SYST.
- */
-static void sfi_unmap_table(struct sfi_table_header *th)
-{
-	if (!TABLE_ON_PAGE(syst_va, th, th->len))
-		sfi_unmap_memory(th, TABLE_ON_PAGE(th, th, th->len) ?
-					sizeof(*th) : th->len);
-}
-
-static int sfi_table_check_key(struct sfi_table_header *th,
-				struct sfi_table_key *key)
-{
-
-	if (strncmp(th->sig, key->sig, SFI_SIGNATURE_SIZE)
-		|| (key->oem_id && strncmp(th->oem_id,
-				key->oem_id, SFI_OEM_ID_SIZE))
-		|| (key->oem_table_id && strncmp(th->oem_table_id,
-				key->oem_table_id, SFI_OEM_TABLE_ID_SIZE)))
-		return -1;
-
-	return 0;
-}
-
-/*
- * This function will be used in 2 cases:
- * 1. used to enumerate and verify the tables addressed by SYST/XSDT,
- *    thus no signature will be given (in kernel boot phase)
- * 2. used to parse one specific table, signature must exist, and
- *    the mapped virt address will be returned, and the virt space
- *    will be released by call sfi_put_table() later
- *
- * This two cases are from two different functions with two different
- * sections and causes section mismatch warning. So use __ref to tell
- * modpost not to make any noise.
- *
- * Return value:
- *	NULL:			when can't find a table matching the key
- *	ERR_PTR(error):		error value
- *	virt table address:	when a matched table is found
- */
-struct sfi_table_header *
- __ref sfi_check_table(u64 pa, struct sfi_table_key *key)
-{
-	struct sfi_table_header *th;
-	void *ret = NULL;
-
-	th = sfi_map_table(pa);
-	if (!th)
-		return ERR_PTR(-ENOMEM);
-
-	if (!key->sig) {
-		sfi_print_table_header(pa, th);
-		if (sfi_verify_table(th))
-			ret = ERR_PTR(-EINVAL);
-	} else {
-		if (!sfi_table_check_key(th, key))
-			return th;	/* Success */
-	}
-
-	sfi_unmap_table(th);
-	return ret;
-}
-
-/*
- * sfi_get_table()
- *
- * Search SYST for the specified table with the signature in
- * the key, and return the mapped table
- */
-struct sfi_table_header *sfi_get_table(struct sfi_table_key *key)
-{
-	struct sfi_table_header *th;
-	u32 tbl_cnt, i;
-
-	tbl_cnt = SFI_GET_NUM_ENTRIES(syst_va, u64);
-	for (i = 0; i < tbl_cnt; i++) {
-		th = sfi_check_table(syst_va->pentry[i], key);
-		if (!IS_ERR(th) && th)
-			return th;
-	}
-
-	return NULL;
-}
-
-void sfi_put_table(struct sfi_table_header *th)
-{
-	sfi_unmap_table(th);
-}
-
-/* Find table with signature, run handler on it */
-int sfi_table_parse(char *signature, char *oem_id, char *oem_table_id,
-			sfi_table_handler handler)
-{
-	struct sfi_table_header *table = NULL;
-	struct sfi_table_key key;
-	int ret = -EINVAL;
-
-	if (sfi_disabled || !handler || !signature)
-		goto exit;
-
-	key.sig = signature;
-	key.oem_id = oem_id;
-	key.oem_table_id = oem_table_id;
-
-	table = sfi_get_table(&key);
-	if (!table)
-		goto exit;
-
-	ret = handler(table);
-	sfi_put_table(table);
-exit:
-	return ret;
-}
-EXPORT_SYMBOL_GPL(sfi_table_parse);
-
-/*
- * sfi_parse_syst()
- * Checksum all the tables in SYST and print their headers
- *
- * success: set syst_va, return 0
- */
-static int __init sfi_parse_syst(void)
-{
-	struct sfi_table_key key = SFI_ANY_KEY;
-	int tbl_cnt, i;
-	void *ret;
-
-	syst_va = sfi_map_memory(syst_pa, sizeof(struct sfi_table_simple));
-	if (!syst_va)
-		return -ENOMEM;
-
-	tbl_cnt = SFI_GET_NUM_ENTRIES(syst_va, u64);
-	for (i = 0; i < tbl_cnt; i++) {
-		ret = sfi_check_table(syst_va->pentry[i], &key);
-		if (IS_ERR(ret))
-			return PTR_ERR(ret);
-	}
-
-	return 0;
-}
-
-/*
- * The OS finds the System Table by searching 16-byte boundaries between
- * physical address 0x000E0000 and 0x000FFFFF. The OS shall search this region
- * starting at the low address and shall stop searching when the 1st valid SFI
- * System Table is found.
- *
- * success: set syst_pa, return 0
- * fail: return -1
- */
-static __init int sfi_find_syst(void)
-{
-	unsigned long offset, len;
-	void *start;
-
-	len = SFI_SYST_SEARCH_END - SFI_SYST_SEARCH_BEGIN;
-	start = sfi_map_memory(SFI_SYST_SEARCH_BEGIN, len);
-	if (!start)
-		return -1;
-
-	for (offset = 0; offset < len; offset += 16) {
-		struct sfi_table_header *syst_hdr;
-
-		syst_hdr = start + offset;
-		if (strncmp(syst_hdr->sig, SFI_SIG_SYST,
-				SFI_SIGNATURE_SIZE))
-			continue;
-
-		if (syst_hdr->len > PAGE_SIZE)
-			continue;
-
-		sfi_print_table_header(SFI_SYST_SEARCH_BEGIN + offset,
-					syst_hdr);
-
-		if (sfi_verify_table(syst_hdr))
-			continue;
-
-		/*
-		 * Enforce SFI spec mandate that SYST reside within a page.
-		 */
-		if (!ON_SAME_PAGE(syst_pa, syst_pa + syst_hdr->len)) {
-			pr_info("SYST 0x%llx + 0x%x crosses page\n",
-					syst_pa, syst_hdr->len);
-			continue;
-		}
-
-		/* Success */
-		syst_pa = SFI_SYST_SEARCH_BEGIN + offset;
-		sfi_unmap_memory(start, len);
-		return 0;
-	}
-
-	sfi_unmap_memory(start, len);
-	return -1;
-}
-
-static struct kobject *sfi_kobj;
-static struct kobject *tables_kobj;
-
-static ssize_t sfi_table_show(struct file *filp, struct kobject *kobj,
-			       struct bin_attribute *bin_attr, char *buf,
-			       loff_t offset, size_t count)
-{
-	struct sfi_table_attr *tbl_attr =
-	    container_of(bin_attr, struct sfi_table_attr, attr);
-	struct sfi_table_header *th = NULL;
-	struct sfi_table_key key;
-	ssize_t cnt;
-
-	key.sig = tbl_attr->name;
-	key.oem_id = NULL;
-	key.oem_table_id = NULL;
-
-	if (strncmp(SFI_SIG_SYST, tbl_attr->name, SFI_SIGNATURE_SIZE)) {
-		th = sfi_get_table(&key);
-		if (!th)
-			return 0;
-
-		cnt =  memory_read_from_buffer(buf, count, &offset,
-						th, th->len);
-		sfi_put_table(th);
-	} else
-		cnt =  memory_read_from_buffer(buf, count, &offset,
-					syst_va, syst_va->header.len);
-
-	return cnt;
-}
-
-struct sfi_table_attr __init *sfi_sysfs_install_table(u64 pa)
-{
-	struct sfi_table_attr *tbl_attr;
-	struct sfi_table_header *th;
-	int ret;
-
-	tbl_attr = kzalloc(sizeof(struct sfi_table_attr), GFP_KERNEL);
-	if (!tbl_attr)
-		return NULL;
-
-	th = sfi_map_table(pa);
-	if (!th || !th->sig[0]) {
-		kfree(tbl_attr);
-		return NULL;
-	}
-
-	sysfs_attr_init(&tbl_attr->attr.attr);
-	memcpy(tbl_attr->name, th->sig, SFI_SIGNATURE_SIZE);
-
-	tbl_attr->attr.size = 0;
-	tbl_attr->attr.read = sfi_table_show;
-	tbl_attr->attr.attr.name = tbl_attr->name;
-	tbl_attr->attr.attr.mode = 0400;
-
-	ret = sysfs_create_bin_file(tables_kobj,
-				  &tbl_attr->attr);
-	if (ret) {
-		kfree(tbl_attr);
-		tbl_attr = NULL;
-	}
-
-	sfi_unmap_table(th);
-	return tbl_attr;
-}
-
-static int __init sfi_sysfs_init(void)
-{
-	int tbl_cnt, i;
-
-	if (sfi_disabled)
-		return 0;
-
-	sfi_kobj = kobject_create_and_add("sfi", firmware_kobj);
-	if (!sfi_kobj)
-		return 0;
-
-	tables_kobj = kobject_create_and_add("tables", sfi_kobj);
-	if (!tables_kobj) {
-		kobject_put(sfi_kobj);
-		return 0;
-	}
-
-	sfi_sysfs_install_table(syst_pa);
-
-	tbl_cnt = SFI_GET_NUM_ENTRIES(syst_va, u64);
-
-	for (i = 0; i < tbl_cnt; i++)
-		sfi_sysfs_install_table(syst_va->pentry[i]);
-
-	sfi_acpi_sysfs_init();
-	kobject_uevent(sfi_kobj, KOBJ_ADD);
-	kobject_uevent(tables_kobj, KOBJ_ADD);
-	pr_info("SFI sysfs interfaces init success\n");
-	return 0;
-}
-
-void __init sfi_init(void)
-{
-	if (!acpi_disabled)
-		disable_sfi();
-
-	if (sfi_disabled)
-		return;
-
-	pr_info("Simple Firmware Interface v0.81 http://simplefirmware.org\n");
-
-	if (sfi_find_syst() || sfi_parse_syst() || sfi_platform_init())
-		disable_sfi();
-
-	return;
-}
-
-void __init sfi_init_late(void)
-{
-	int length;
-
-	if (sfi_disabled)
-		return;
-
-	length = syst_va->header.len;
-	sfi_unmap_memory(syst_va, sizeof(struct sfi_table_simple));
-
-	/* Use memremap now after it is ready */
-	sfi_use_memremap = 1;
-	syst_va = sfi_map_memory(syst_pa, length);
-
-	sfi_acpi_init();
-}
-
-/*
- * The reason we put it here because we need wait till the /sys/firmware
- * is setup, then our interface can be registered in /sys/firmware/sfi
- */
-core_initcall(sfi_sysfs_init);
diff --git a/drivers/sfi/sfi_core.h b/drivers/sfi/sfi_core.h
deleted file mode 100644
index 1d5cfe854cf7..000000000000
--- a/drivers/sfi/sfi_core.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/* sfi_core.h Simple Firmware Interface, internal header */
-
-/*
-
-  This file is provided under a dual BSD/GPLv2 license.  When using or
-  redistributing this file, you may do so under either license.
-
-  GPL LICENSE SUMMARY
-
-  Copyright(c) 2009 Intel Corporation. All rights reserved.
-
-  This program is free software; you can redistribute it and/or modify
-  it under the terms of version 2 of the GNU General Public License as
-  published by the Free Software Foundation.
-
-  This program is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-  General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program; if not, write to the Free Software
-  Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
-  The full GNU General Public License is included in this distribution
-  in the file called LICENSE.GPL.
-
-  BSD LICENSE
-
-  Copyright(c) 2009 Intel Corporation. All rights reserved.
-
-  Redistribution and use in source and binary forms, with or without
-  modification, are permitted provided that the following conditions
-  are met:
-
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above copyright
-      notice, this list of conditions and the following disclaimer in
-      the documentation and/or other materials provided with the
-      distribution.
-    * Neither the name of Intel Corporation nor the names of its
-      contributors may be used to endorse or promote products derived
-      from this software without specific prior written permission.
-
-  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-*/
-
-#include <linux/sysfs.h>
-
-struct sfi_table_key{
-	char	*sig;
-	char	*oem_id;
-	char	*oem_table_id;
-};
-
-/* sysfs interface */
-struct sfi_table_attr {
-	struct bin_attribute attr;
-	char name[8];
-};
-
-#define SFI_ANY_KEY { .sig = NULL, .oem_id = NULL, .oem_table_id = NULL }
-
-extern int __init sfi_acpi_init(void);
-extern  struct sfi_table_header *sfi_check_table(u64 paddr,
-					struct sfi_table_key *key);
-struct sfi_table_header *sfi_get_table(struct sfi_table_key *key);
-extern void sfi_put_table(struct sfi_table_header *table);
-extern struct sfi_table_attr __init *sfi_sysfs_install_table(u64 pa);
-extern void __init sfi_acpi_sysfs_init(void);