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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/sfi/sfi_acpi.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/sfi/sfi_acpi.c')
-rw-r--r--kernel/drivers/sfi/sfi_acpi.c214
1 files changed, 214 insertions, 0 deletions
diff --git a/kernel/drivers/sfi/sfi_acpi.c b/kernel/drivers/sfi/sfi_acpi.c
new file mode 100644
index 000000000..d277b36eb
--- /dev/null
+++ b/kernel/drivers/sfi/sfi_acpi.c
@@ -0,0 +1,214 @@
+/* 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;
+}