[S390] cio: Add chsc subchannel driver.

This patch adds a driver for subchannels of type chsc.

A device /dev/chsc is created which may be used to issue ioctls to:
- obtain information about the machine's I/O configuration
- dynamically change the machine's I/O configuration via
  asynchronous chsc commands

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 15 insertions, 6 deletions

diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h
index 2a38b5090228..fb6c4d6c45b4 100644
--- a/drivers/s390/cio/chsc.h
+++ b/drivers/s390/cio/chsc.h
@@ -4,7 +4,8 @@
 #include <linux/types.h>
 #include <linux/device.h>
 #include <asm/chpid.h>
-#include "schid.h"
+#include <asm/chsc.h>
+#include <asm/schid.h>
 
 #define CHSC_SDA_OC_MSS   0x2
 
@@ -37,11 +38,14 @@ struct channel_path_desc {
 struct channel_path;
 
 struct css_general_char {
-        u64 : 41;
+        u64 : 12;
+        u32 dynio : 1;   /* bit 12 */
+        u32 : 28;
         u32 aif : 1;     /* bit 41 */
         u32 : 3;
         u32 mcss : 1;    /* bit 45 */
-        u32 : 2;
+        u32 fcs : 1;     /* bit 46 */
+        u32 : 1;
         u32 ext_mb : 1;  /* bit 48 */
         u32 : 7;
         u32 aif_tdd : 1; /* bit 56 */
@@ -49,7 +53,9 @@ struct css_general_char {
         u32 qebsm : 1;   /* bit 58 */
         u32 : 8;
         u32 aif_osa : 1; /* bit 67 */
-        u32 : 20;
+        u32 : 14;
+        u32 cib : 1;     /* bit 82 */
+        u32 : 5;
         u32 fcx : 1;     /* bit 88 */
         u32 : 7;
 }__attribute__((packed));
@@ -86,8 +92,11 @@ struct channel_subsystem;
 extern int chsc_secm(struct channel_subsystem *, int);
 
 int chsc_chp_vary(struct chp_id chpid, int on);
-int chsc_determine_channel_path_description(struct chp_id chpid,
-                                            struct channel_path_desc *desc);
+int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
+                                     int c, int m,
+                                     struct chsc_response_struct *resp);
+int chsc_determine_base_channel_path_desc(struct chp_id chpid,
+                                          struct channel_path_desc *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);