[S390] cio: Introduce subchannel->private.

Introduce a private pointer in struct subchannel to store
per-subchannel type data (cannot use dev->priv since this
is already used for something else).

Create a new header io_sch.h for I/O subchannel specific structures
and instructions.

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

1 files changed, 30 insertions, 54 deletions

diff --git a/drivers/s390/cio/cio.h b/drivers/s390/cio/cio.h
index 7446c39951a7..a6ef218defbe 100644
--- a/drivers/s390/cio/cio.h
+++ b/drivers/s390/cio/cio.h
@@ -11,32 +11,32 @@
  * path management control word
  */
 struct pmcw {
-        __u32 intparm;          /* interruption parameter */
-        __u32 qf   : 1;         /* qdio facility */
-        __u32 res0 : 1;         /* reserved zeros */
-        __u32 isc  : 3;         /* interruption sublass */
-        __u32 res5 : 3;         /* reserved zeros */
-        __u32 ena  : 1;         /* enabled */
-        __u32 lm   : 2;         /* limit mode */
-        __u32 mme  : 2;         /* measurement-mode enable */
-        __u32 mp   : 1;         /* multipath mode */
-        __u32 tf   : 1;         /* timing facility */
-        __u32 dnv  : 1;         /* device number valid */
-        __u32 dev  : 16;        /* device number */
-        __u8  lpm;              /* logical path mask */
-        __u8  pnom;             /* path not operational mask */
-        __u8  lpum;             /* last path used mask */
-        __u8  pim;              /* path installed mask */
-        __u16 mbi;              /* measurement-block index */
-        __u8  pom;              /* path operational mask */
-        __u8  pam;              /* path available mask */
-        __u8  chpid[8];         /* CHPID 0-7 (if available) */
-        __u32 unused1 : 8;      /* reserved zeros */
-        __u32 st      : 3;      /* subchannel type */
-        __u32 unused2 : 18;     /* reserved zeros */
-        __u32 mbfc    : 1;      /* measurement block format control */
-        __u32 xmwme   : 1;      /* extended measurement word mode enable */
-        __u32 csense  : 1;      /* concurrent sense; can be enabled ...*/
+        u32 intparm;            /* interruption parameter */
+        u32 qf   : 1;           /* qdio facility */
+        u32 res0 : 1;           /* reserved zeros */
+        u32 isc  : 3;           /* interruption sublass */
+        u32 res5 : 3;           /* reserved zeros */
+        u32 ena  : 1;           /* enabled */
+        u32 lm   : 2;           /* limit mode */
+        u32 mme  : 2;           /* measurement-mode enable */
+        u32 mp   : 1;           /* multipath mode */
+        u32 tf   : 1;           /* timing facility */
+        u32 dnv  : 1;           /* device number valid */
+        u32 dev  : 16;          /* device number */
+        u8  lpm;                /* logical path mask */
+        u8  pnom;               /* path not operational mask */
+        u8  lpum;               /* last path used mask */
+        u8  pim;                /* path installed mask */
+        u16 mbi;                /* measurement-block index */
+        u8  pom;                /* path operational mask */
+        u8  pam;                /* path available mask */
+        u8  chpid[8];           /* CHPID 0-7 (if available) */
+        u32 unused1 : 8;        /* reserved zeros */
+        u32 st      : 3;        /* subchannel type */
+        u32 unused2 : 18;       /* reserved zeros */
+        u32 mbfc    : 1;        /* measurement block format control */
+        u32 xmwme   : 1;        /* extended measurement word mode enable */
+        u32 csense  : 1;        /* concurrent sense; can be enabled ...*/
                                 /*  ... per MSCH, however, if facility */
                                 /*  ... is not installed, this results */
                                 /*  ... in an operand exception.       */
@@ -52,31 +52,6 @@ struct schib {
         __u8 mda[4];             /* model dependent area */
 } __attribute__ ((packed,aligned(4)));
 
-/*
- * operation request block
- */
-struct orb {
-        __u32 intparm;          /* interruption parameter */
-        __u32 key  : 4;         /* flags, like key, suspend control, etc. */
-        __u32 spnd : 1;         /* suspend control */
-        __u32 res1 : 1;         /* reserved */
-        __u32 mod  : 1;         /* modification control */
-        __u32 sync : 1;         /* synchronize control */
-        __u32 fmt  : 1;         /* format control */
-        __u32 pfch : 1;         /* prefetch control */
-        __u32 isic : 1;         /* initial-status-interruption control */
-        __u32 alcc : 1;         /* address-limit-checking control */
-        __u32 ssic : 1;         /* suppress-suspended-interr. control */
-        __u32 res2 : 1;         /* reserved */
-        __u32 c64  : 1;         /* IDAW/QDIO 64 bit control  */
-        __u32 i2k  : 1;         /* IDAW 2/4kB block size control */
-        __u32 lpm  : 8;         /* logical path mask */
-        __u32 ils  : 1;         /* incorrect length */
-        __u32 zero : 6;         /* reserved zeros */
-        __u32 orbx : 1;         /* ORB extension control */
-        __u32 cpa;              /* channel program address */
-}  __attribute__ ((packed,aligned(4)));
-
 /* subchannel data structure used by I/O subroutines */
 struct subchannel {
         struct subchannel_id schid;
@@ -99,11 +74,10 @@ struct subchannel {
         __u8 lpm;               /* logical path mask */
         __u8 opm;               /* operational path mask */
         struct schib schib;     /* subchannel information block */
-        struct orb orb;         /* operation request block */
-        struct ccw1 sense_ccw;  /* static ccw for sense command */
         struct chsc_ssd_info ssd_info;  /* subchannel description */
         struct device dev;      /* entry in device tree */
         struct css_driver *driver;
+        void *private; /* private per subchannel type data */
 } __attribute__ ((aligned(8)));
 
 #define IO_INTERRUPT_TYPE          0 /* I/O interrupt type */
@@ -133,10 +107,12 @@ extern void cio_release_console(void);
 extern int cio_is_console(struct subchannel_id);
 extern struct subchannel *cio_get_console_subchannel(void);
 extern spinlock_t * cio_get_console_lock(void);
+extern void *cio_get_console_priv(void);
 #else
 #define cio_is_console(schid) 0
 #define cio_get_console_subchannel() NULL
-#define cio_get_console_lock() NULL;
+#define cio_get_console_lock() NULL
+#define cio_get_console_priv() NULL
 #endif
 
 extern int cio_show_msg;