[SCSI] zfcp: handle unsolicited status notification lost

Handle unsolicited adapter status that informs about loss of
previous unsolicited status notification(s).

Signed-off-by: Maxim Shchetynin <maxim@de.ibm.com>
Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 47 insertions, 0 deletions

diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 59587951c847..bf859c9982df 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -964,6 +964,40 @@ zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
                                         | ZFCP_STATUS_COMMON_ERP_FAILED);
                 break;
 
+        case FSF_STATUS_READ_NOTIFICATION_LOST:
+                ZFCP_LOG_NORMAL("Unsolicited status notification(s) lost: "
+                                "adapter %s%s%s%s%s%s%s%s%s\n",
+                                zfcp_get_busid_by_adapter(adapter),
+                                (status_buffer->status_subtype &
+                                        FSF_STATUS_READ_SUB_INCOMING_ELS) ?
+                                        ", incoming ELS" : "",
+                                (status_buffer->status_subtype &
+                                        FSF_STATUS_READ_SUB_SENSE_DATA) ?
+                                        ", sense data" : "",
+                                (status_buffer->status_subtype &
+                                        FSF_STATUS_READ_SUB_LINK_STATUS) ?
+                                        ", link status change" : "",
+                                (status_buffer->status_subtype &
+                                        FSF_STATUS_READ_SUB_PORT_CLOSED) ?
+                                        ", port close" : "",
+                                (status_buffer->status_subtype &
+                                        FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD) ?
+                                        ", bit error exception" : "",
+                                (status_buffer->status_subtype &
+                                        FSF_STATUS_READ_SUB_ACT_UPDATED) ?
+                                        ", ACT update" : "",
+                                (status_buffer->status_subtype &
+                                        FSF_STATUS_READ_SUB_ACT_HARDENED) ?
+                                        ", ACT hardening" : "",
+                                (status_buffer->status_subtype &
+                                        FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT) ?
+                                        ", adapter feature change" : "");
+
+                if (status_buffer->status_subtype &
+                    FSF_STATUS_READ_SUB_ACT_UPDATED)
+                        zfcp_erp_adapter_access_changed(adapter);
+                break;
+
         case FSF_STATUS_READ_CFDC_UPDATED:
                 ZFCP_LOG_NORMAL("CFDC has been updated on the adapter %s\n",
                               zfcp_get_busid_by_adapter(adapter));
@@ -1954,6 +1988,7 @@ zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
         erp_action->fsf_req->qtcb->bottom.config.feature_selection =
                         FSF_FEATURE_CFDC |
                         FSF_FEATURE_LUN_SHARING |
+                        FSF_FEATURE_NOTIFICATION_LOST |
                         FSF_FEATURE_UPDATE_ALERT;
 
         /* start QDIO request for this FSF request */
diff --git a/drivers/s390/scsi/zfcp_fsf.h b/drivers/s390/scsi/zfcp_fsf.h
index 48719f055952..39475dbcb614 100644
--- a/drivers/s390/scsi/zfcp_fsf.h
+++ b/drivers/s390/scsi/zfcp_fsf.h
@@ -166,6 +166,7 @@
 #define FSF_STATUS_READ_BIT_ERROR_THRESHOLD     0x00000004
 #define FSF_STATUS_READ_LINK_DOWN               0x00000005
 #define FSF_STATUS_READ_LINK_UP                 0x00000006
+#define FSF_STATUS_READ_NOTIFICATION_LOST       0x00000009
 #define FSF_STATUS_READ_CFDC_UPDATED            0x0000000A
 #define FSF_STATUS_READ_CFDC_HARDENED           0x0000000B
 #define FSF_STATUS_READ_FEATURE_UPDATE_ALERT    0x0000000C
@@ -179,6 +180,16 @@
 #define FSF_STATUS_READ_SUB_FDISC_FAILED        0x00000001
 #define FSF_STATUS_READ_SUB_FIRMWARE_UPDATE     0x00000002
 
+/* status subtypes for unsolicited status notification lost */
+#define FSF_STATUS_READ_SUB_INCOMING_ELS        0x00000001
+#define FSF_STATUS_READ_SUB_SENSE_DATA          0x00000002
+#define FSF_STATUS_READ_SUB_LINK_STATUS         0x00000004
+#define FSF_STATUS_READ_SUB_PORT_CLOSED         0x00000008
+#define FSF_STATUS_READ_SUB_BIT_ERROR_THRESHOLD 0x00000010
+#define FSF_STATUS_READ_SUB_ACT_UPDATED         0x00000020
+#define FSF_STATUS_READ_SUB_ACT_HARDENED        0x00000040
+#define FSF_STATUS_READ_SUB_FEATURE_UPDATE_ALERT 0x00000080
+
 /* status subtypes for CFDC */
 #define FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE 0x00000002
 #define FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2 0x0000000F
@@ -211,6 +222,7 @@
 /* channel features */
 #define FSF_FEATURE_CFDC                        0x00000002
 #define FSF_FEATURE_LUN_SHARING                 0x00000004
+#define FSF_FEATURE_NOTIFICATION_LOST           0x00000008
 #define FSF_FEATURE_HBAAPI_MANAGEMENT           0x00000010
 #define FSF_FEATURE_ELS_CT_CHAINED_SBALS        0x00000020
 #define FSF_FEATURE_UPDATE_ALERT                0x00000100