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.h b/drivers/s390/cio/chsc.h
index b5261f3..3aa94fe 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -119,4 +119,39 @@
int chsc_siosl(struct subchannel_id schid);
+/* Functions and definitions to query storage-class memory. */
+struct sale {
+ u64 sa;
+ u32 p:4;
+ u32 op_state:4;
+ u32 data_state:4;
+ u32 rank:4;
+ u32 r:1;
+ u32:7;
+ u32 rid:8;
+ u32:32;
+} __packed;
+
+struct chsc_scm_info {
+ struct chsc_header request;
+ u32:32;
+ u64 reqtok;
+ u32 reserved1[4];
+ struct chsc_header response;
+ u64:56;
+ u8 rq;
+ u32 mbc;
+ u64 msa;
+ u16 is;
+ u16 mmc;
+ u32 mci;
+ u64 nr_scm_ini;
+ u64 nr_scm_unini;
+ u32 reserved2[10];
+ u64 restok;
+ struct sale scmal[248];
+} __packed;
+
+int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
+
#endif