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;
}
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);
xsdt_va = (struct acpi_table_xsdt *)sfi_get_table(&xsdt_key);
return 0;
}
/* 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;
}
