1 files changed, 66 insertions, 0 deletions

diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
new file mode 100644
index 000000000000..be20da49d147
--- /dev/null
+++ b/drivers/s390/cio/chsc.h
@@ -0,0 +1,66 @@
+#ifndef S390_CHSC_H
+#define S390_CHSC_H
+
+#define NR_CHPIDS 256
+
+#define CHSC_SEI_ACC_CHPID        1
+#define CHSC_SEI_ACC_LINKADDR     2
+#define CHSC_SEI_ACC_FULLLINKADDR 3
+
+struct chsc_header {
+        u16 length;
+        u16 code;
+};
+
+struct channel_path_desc {
+        u8 flags;
+        u8 lsn;
+        u8 desc;
+        u8 chpid;
+        u8 swla;
+        u8 zeroes;
+        u8 chla;
+        u8 chpp;
+};
+
+struct channel_path {
+        int id;
+        int state;
+        struct channel_path_desc desc;
+        struct device dev;
+};
+
+extern void s390_process_css( void );
+extern void chsc_validate_chpids(struct subchannel *);
+extern void chpid_is_actually_online(int);
+
+struct css_general_char {
+        u64 : 41;
+        u32 aif : 1;     /* bit 41 */
+        u32 : 3;
+        u32 mcss : 1;    /* bit 45 */
+        u32 : 2;
+        u32 ext_mb : 1;  /* bit 48 */
+        u32 : 7;
+        u32 aif_tdd : 1; /* bit 56 */
+        u32 : 10;
+        u32 aif_osa : 1; /* bit 67 */
+        u32 : 28;
+}__attribute__((packed));
+
+struct css_chsc_char {
+        u64 res;
+        u64 : 43;
+        u32 scssc : 1;  /* bit 107 */
+        u32 scsscf : 1; /* bit 108 */
+        u32 : 19;
+}__attribute__((packed));
+
+extern struct css_general_char css_general_characteristics;
+extern struct css_chsc_char css_chsc_characteristics;
+
+extern int chsc_determine_css_characteristics(void);
+extern int css_characteristics_avail;
+
+extern void *chsc_get_chp_desc(struct subchannel*, int);
+#endif