1 files changed, 52 insertions, 0 deletions

diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index cfe0c087fe5c..4d51a7c4eb8b 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -52,6 +52,11 @@ int chsc_error_from_response(int response)
                 return -EINVAL;
         case 0x0004:
                 return -EOPNOTSUPP;
+        case 0x000b:
+                return -EBUSY;
+        case 0x0100:
+        case 0x0102:
+                return -ENOMEM;
         default:
                 return -EIO;
         }
@@ -393,6 +398,20 @@ static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
         }
 }
 
+static void chsc_process_sei_scm_change(struct chsc_sei_area *sei_area)
+{
+        int ret;
+
+        CIO_CRW_EVENT(4, "chsc: scm change notification\n");
+        if (sei_area->rs != 7)
+                return;
+
+        ret = scm_update_information();
+        if (ret)
+                CIO_CRW_EVENT(0, "chsc: updating change notification"
+                              " failed (rc=%d).\n", ret);
+}
+
 static void chsc_process_sei(struct chsc_sei_area *sei_area)
 {
         /* Check if we might have lost some information. */
@@ -414,6 +433,9 @@ static void chsc_process_sei(struct chsc_sei_area *sei_area)
         case 8: /* channel-path-configuration notification */
                 chsc_process_sei_chp_config(sei_area);
                 break;
+        case 12: /* scm change notification */
+                chsc_process_sei_scm_change(sei_area);
+                break;
         default: /* other stuff */
                 CIO_CRW_EVENT(4, "chsc: unhandled sei content code %d\n",
                               sei_area->cc);
@@ -1047,3 +1069,33 @@ out:
         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);