s390/dasd: add support for control unit initiated reconfiguration
Add support for Control Unit Initiated Reconfiguration (CUIR) to
Linux, a storage server interface to reconcile concurrent hardware
changes between storage and host.
Reviewed-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/block/dasd_eckd.h b/drivers/s390/block/dasd_eckd.h
index 2555e49..ddab7df 100644
--- a/drivers/s390/block/dasd_eckd.h
+++ b/drivers/s390/block/dasd_eckd.h
@@ -51,8 +51,35 @@
/*
* Perform Subsystem Function / Sub-Orders
*/
-#define PSF_ORDER_PRSSD 0x18
-#define PSF_ORDER_SSC 0x1D
+#define PSF_ORDER_PRSSD 0x18
+#define PSF_ORDER_CUIR_RESPONSE 0x1A
+#define PSF_ORDER_SSC 0x1D
+
+/*
+ * CUIR response condition codes
+ */
+#define PSF_CUIR_INVALID 0x00
+#define PSF_CUIR_COMPLETED 0x01
+#define PSF_CUIR_NOT_SUPPORTED 0x02
+#define PSF_CUIR_ERROR_IN_REQ 0x03
+#define PSF_CUIR_DENIED 0x04
+#define PSF_CUIR_LAST_PATH 0x05
+#define PSF_CUIR_DEVICE_ONLINE 0x06
+#define PSF_CUIR_VARY_FAILURE 0x07
+#define PSF_CUIR_SOFTWARE_FAILURE 0x08
+#define PSF_CUIR_NOT_RECOGNIZED 0x09
+
+/*
+ * CUIR codes
+ */
+#define CUIR_QUIESCE 0x01
+#define CUIR_RESUME 0x02
+
+/*
+ * attention message definitions
+ */
+#define ATTENTION_LENGTH_CUIR 0x0e
+#define ATTENTION_FORMAT_CUIR 0x01
/*
* Size that is reportet for large volumes in the old 16-bit no_cyl field
@@ -342,6 +369,38 @@
char feature[256];
} __attribute__((packed));
+struct dasd_rssd_messages {
+ __u16 length;
+ __u8 format;
+ __u8 code;
+ __u32 message_id;
+ __u8 flags;
+ char messages[4087];
+} __packed;
+
+struct dasd_cuir_message {
+ __u16 length;
+ __u8 format;
+ __u8 code;
+ __u32 message_id;
+ __u8 flags;
+ __u8 neq_map[3];
+ __u8 ned_map;
+ __u8 record_selector;
+} __packed;
+
+struct dasd_psf_cuir_response {
+ __u8 order;
+ __u8 flags;
+ __u8 cc;
+ __u8 chpid;
+ __u16 device_nr;
+ __u16 reserved;
+ __u32 message_id;
+ __u64 system_id;
+ __u8 cssid;
+ __u8 ssid;
+} __packed;
/*
* Perform Subsystem Function - Prepare for Read Subsystem Data