Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / s390 / cio / cio.h

diff --git a/kernel/drivers/s390/cio/cio.h b/kernel/drivers/s390/cio/cio.h
new file mode 100644 (file)
index 0000000..a01376a
--- /dev/null
+++ b/kernel/drivers/s390/cio/cio.h
@@ -0,0 +1,137 @@
+#ifndef S390_CIO_H
+#define S390_CIO_H
+
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <linux/mod_devicetable.h>
+#include <asm/chpid.h>
+#include <asm/cio.h>
+#include <asm/fcx.h>
+#include <asm/schid.h>
+#include "chsc.h"
+
+/*
+ * path management control word
+ */
+struct pmcw {
+       u32 intparm;            /* interruption parameter */
+       u32 qf   : 1;           /* qdio facility */
+       u32 w    : 1;
+       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.       */
+} __attribute__ ((packed));
+
+/* Target SCHIB configuration. */
+struct schib_config {
+       u64 mba;
+       u32 intparm;
+       u16 mbi;
+       u32 isc:3;
+       u32 ena:1;
+       u32 mme:2;
+       u32 mp:1;
+       u32 csense:1;
+       u32 mbfc:1;
+} __attribute__ ((packed));
+
+/*
+ * subchannel information block
+ */
+struct schib {
+       struct pmcw pmcw;        /* path management control word */
+       union scsw scsw;         /* subchannel status word */
+       __u64 mba;               /* measurement block address */
+       __u8 mda[4];             /* model dependent area */
+} __attribute__ ((packed,aligned(4)));
+
+/*
+ * When rescheduled, todo's with higher values will overwrite those
+ * with lower values.
+ */
+enum sch_todo {
+       SCH_TODO_NOTHING,
+       SCH_TODO_EVAL,
+       SCH_TODO_UNREG,
+};
+
+/* subchannel data structure used by I/O subroutines */
+struct subchannel {
+       struct subchannel_id schid;
+       spinlock_t *lock;       /* subchannel lock */
+       struct mutex reg_mutex;
+       enum {
+               SUBCHANNEL_TYPE_IO = 0,
+               SUBCHANNEL_TYPE_CHSC = 1,
+               SUBCHANNEL_TYPE_MSG = 2,
+               SUBCHANNEL_TYPE_ADM = 3,
+       } st;                   /* subchannel type */
+       __u8 vpm;               /* verified path mask */
+       __u8 lpm;               /* logical path mask */
+       __u8 opm;               /* operational path mask */
+       struct schib schib;     /* subchannel information block */
+       int isc; /* desired interruption subclass */
+       struct chsc_ssd_info ssd_info;  /* subchannel description */
+       struct device dev;      /* entry in device tree */
+       struct css_driver *driver;
+       enum sch_todo todo;
+       struct work_struct todo_work;
+       struct schib_config config;
+} __attribute__ ((aligned(8)));
+
+DECLARE_PER_CPU(struct irb, cio_irb);
+
+#define to_subchannel(n) container_of(n, struct subchannel, dev)
+
+extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
+extern int cio_enable_subchannel(struct subchannel *, u32);
+extern int cio_disable_subchannel (struct subchannel *);
+extern int cio_cancel (struct subchannel *);
+extern int cio_clear (struct subchannel *);
+extern int cio_resume (struct subchannel *);
+extern int cio_halt (struct subchannel *);
+extern int cio_start (struct subchannel *, struct ccw1 *, __u8);
+extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
+extern int cio_cancel (struct subchannel *);
+extern int cio_set_options (struct subchannel *, int);
+extern int cio_update_schib(struct subchannel *sch);
+extern int cio_commit_config(struct subchannel *sch);
+
+int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key);
+int cio_tm_intrg(struct subchannel *sch);
+
+/* Use with care. */
+#ifdef CONFIG_CCW_CONSOLE
+extern struct subchannel *cio_probe_console(void);
+extern int cio_is_console(struct subchannel_id);
+extern void cio_register_early_subchannels(void);
+extern void cio_tsch(struct subchannel *sch);
+#else
+#define cio_is_console(schid) 0
+static inline void cio_register_early_subchannels(void) {}
+#endif
+
+#endif