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authorFeng Tang <feng.tang@intel.com>2010-05-26 11:28:08 +0800
committerLen Brown <len.brown@intel.com>2010-05-27 12:46:20 -0400
commitdce80a56268fffd6b5ea57b3f6ba3d027a68f05e (patch)
tree387349e5e6ee31dbe26c57ac0bf5d223af4ef838 /drivers/sfi/sfi_acpi.c
parent5487ab4a5a71e955fef7094a0624df0542da91ef (diff)
downloadop-kernel-dev-dce80a56268fffd6b5ea57b3f6ba3d027a68f05e.zip
op-kernel-dev-dce80a56268fffd6b5ea57b3f6ba3d027a68f05e.tar.gz
SFI: add sysfs interface for SFI tables.
Analogous to ACPI's /sys/firmware/acpi/tables/... create /sys/firmware/sfi/tables/ The tables are primariy for the kernel, but sometimes it is useful for user-space to be able to read them. Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/sfi/sfi_acpi.c')
-rw-r--r--drivers/sfi/sfi_acpi.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/sfi/sfi_acpi.c b/drivers/sfi/sfi_acpi.c
index 34aba30..f5b4ca5 100644
--- a/drivers/sfi/sfi_acpi.c
+++ b/drivers/sfi/sfi_acpi.c
@@ -173,3 +173,44 @@ int sfi_acpi_table_parse(char *signature, char *oem_id, char *oem_table_id,
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;
+}
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