s390/chsc: implement store SCM information
chsc_scm_info will be used to detect all available increments of
storage class memory.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index cfe0c08..1218653 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -52,6 +52,11 @@
return -EINVAL;
case 0x0004:
return -EOPNOTSUPP;
+ case 0x000b:
+ return -EBUSY;
+ case 0x0100:
+ case 0x0102:
+ return -ENOMEM;
default:
return -EIO;
}
@@ -1047,3 +1052,33 @@
return rc;
}
EXPORT_SYMBOL_GPL(chsc_siosl);
+
+/**
+ * chsc_scm_info() - store SCM information (SSI)
+ * @scm_area: request and response block for SSI
+ * @token: continuation token
+ *
+ * Returns 0 on success.
+ */
+int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
+{
+ int ccode, ret;
+
+ memset(scm_area, 0, sizeof(*scm_area));
+ scm_area->request.length = 0x0020;
+ scm_area->request.code = 0x004C;
+ scm_area->reqtok = token;
+
+ ccode = chsc(scm_area);
+ if (ccode > 0) {
+ ret = (ccode == 3) ? -ENODEV : -EBUSY;
+ goto out;
+ }
+ ret = chsc_error_from_response(scm_area->response.code);
+ if (ret != 0)
+ CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n",
+ scm_area->response.code);
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(chsc_scm_info);