[S390] cio: obtain mdc value per channel path

Add support to accumulate the number of 64K-bytes blocks all paths
to a device at least support for a transport command.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 6693f5e3176f..3f15b2aaeaea 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -35,6 +35,22 @@ struct channel_path_desc {
         u8 chpp;
 } __attribute__ ((packed));
 
+struct channel_path_desc_fmt1 {
+        u8 flags;
+        u8 lsn;
+        u8 desc;
+        u8 chpid;
+        u32:24;
+        u8 chpp;
+        u32 unused[3];
+        u16 mdc;
+        u16:13;
+        u8 r:1;
+        u8 s:1;
+        u8 f:1;
+        u32 zeros[2];
+} __attribute__ ((packed));
+
 struct channel_path;
 
 struct css_chsc_char {
@@ -92,6 +108,8 @@ int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
                                      int c, int m, void *page);
 int chsc_determine_base_channel_path_desc(struct chp_id chpid,
                                           struct channel_path_desc *desc);
+int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
+                                          struct channel_path_desc_fmt1 *desc);
 void chsc_chp_online(struct chp_id chpid);
 void chsc_chp_offline(struct chp_id chpid);
 int chsc_get_channel_measurement_chars(struct channel_path *chp);