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author | Feng Tang <feng.tang@intel.com> | 2010-05-26 03:28:08 (GMT) |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2010-05-27 16:46:20 (GMT) |
commit | dce80a56268fffd6b5ea57b3f6ba3d027a68f05e (patch) | |
tree | 387349e5e6ee31dbe26c57ac0bf5d223af4ef838 /drivers/sfi/sfi_acpi.c | |
parent | 5487ab4a5a71e955fef7094a0624df0542da91ef (diff) | |
download | linux-dce80a56268fffd6b5ea57b3f6ba3d027a68f05e.tar.xz |
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.c | 41 |
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; +} |