Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/drivers/s390/cio/css.h b/kernel/drivers/s390/cio/css.h
new file mode 100644 (file)
index 0000000..2c9107e
--- /dev/null
+++ b/kernel/drivers/s390/cio/css.h
@@ -0,0 +1,146 @@
+#ifndef _CSS_H
+#define _CSS_H
+
+#include <linux/mutex.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+#include <linux/device.h>
+#include <linux/types.h>
+
+#include <asm/cio.h>
+#include <asm/chpid.h>
+#include <asm/schid.h>
+
+#include "cio.h"
+
+/*
+ * path grouping stuff
+ */
+#define SPID_FUNC_SINGLE_PATH     0x00
+#define SPID_FUNC_MULTI_PATH      0x80
+#define SPID_FUNC_ESTABLISH       0x00
+#define SPID_FUNC_RESIGN          0x40
+#define SPID_FUNC_DISBAND         0x20
+
+#define SNID_STATE1_RESET         0
+#define SNID_STATE1_UNGROUPED     2
+#define SNID_STATE1_GROUPED       3
+
+#define SNID_STATE2_NOT_RESVD     0
+#define SNID_STATE2_RESVD_ELSE    2
+#define SNID_STATE2_RESVD_SELF    3
+
+#define SNID_STATE3_MULTI_PATH    1
+#define SNID_STATE3_SINGLE_PATH           0
+
+struct path_state {
+       __u8  state1 : 2;       /* path state value 1 */
+       __u8  state2 : 2;       /* path state value 2 */
+       __u8  state3 : 1;       /* path state value 3 */
+       __u8  resvd  : 3;       /* reserved */
+} __attribute__ ((packed));
+
+struct extended_cssid {
+       u8 version;
+       u8 cssid;
+} __attribute__ ((packed));
+
+struct pgid {
+       union {
+               __u8 fc;        /* SPID function code */
+               struct path_state ps;   /* SNID path state */
+       } __attribute__ ((packed)) inf;
+       union {
+               __u32 cpu_addr  : 16;   /* CPU address */
+               struct extended_cssid ext_cssid;
+       } __attribute__ ((packed)) pgid_high;
+       __u32 cpu_id    : 24;   /* CPU identification */
+       __u32 cpu_model : 16;   /* CPU model */
+       __u32 tod_high;         /* high word TOD clock */
+} __attribute__ ((packed));
+
+struct subchannel;
+struct chp_link;
+/**
+ * struct css_driver - device driver for subchannels
+ * @subchannel_type: subchannel type supported by this driver
+ * @drv: embedded device driver structure
+ * @irq: called on interrupts
+ * @chp_event: called for events affecting a channel path
+ * @sch_event: called for events affecting the subchannel
+ * @probe: function called on probe
+ * @remove: function called on remove
+ * @shutdown: called at device shutdown
+ * @prepare: prepare for pm state transition
+ * @complete: undo work done in @prepare
+ * @freeze: callback for freezing during hibernation snapshotting
+ * @thaw: undo work done in @freeze
+ * @restore: callback for restoring after hibernation
+ * @settle: wait for asynchronous work to finish
+ */
+struct css_driver {
+       struct css_device_id *subchannel_type;
+       struct device_driver drv;
+       void (*irq)(struct subchannel *);
+       int (*chp_event)(struct subchannel *, struct chp_link *, int);
+       int (*sch_event)(struct subchannel *, int);
+       int (*probe)(struct subchannel *);
+       int (*remove)(struct subchannel *);
+       void (*shutdown)(struct subchannel *);
+       int (*prepare) (struct subchannel *);
+       void (*complete) (struct subchannel *);
+       int (*freeze)(struct subchannel *);
+       int (*thaw) (struct subchannel *);
+       int (*restore)(struct subchannel *);
+       int (*settle)(void);
+};
+
+#define to_cssdriver(n) container_of(n, struct css_driver, drv)
+
+extern int css_driver_register(struct css_driver *);
+extern void css_driver_unregister(struct css_driver *);
+
+extern void css_sch_device_unregister(struct subchannel *);
+extern int css_register_subchannel(struct subchannel *);
+extern struct subchannel *css_alloc_subchannel(struct subchannel_id);
+extern struct subchannel *get_subchannel_by_schid(struct subchannel_id);
+extern int css_init_done;
+extern int max_ssid;
+int for_each_subchannel_staged(int (*fn_known)(struct subchannel *, void *),
+                              int (*fn_unknown)(struct subchannel_id,
+                              void *), void *data);
+extern int for_each_subchannel(int(*fn)(struct subchannel_id, void *), void *);
+void css_update_ssd_info(struct subchannel *sch);
+
+struct channel_subsystem {
+       u8 cssid;
+       int valid;
+       struct channel_path *chps[__MAX_CHPID + 1];
+       struct device device;
+       struct pgid global_pgid;
+       struct mutex mutex;
+       /* channel measurement related */
+       int cm_enabled;
+       void *cub_addr1;
+       void *cub_addr2;
+       /* for orphaned ccw devices */
+       struct subchannel *pseudo_subchannel;
+};
+#define to_css(dev) container_of(dev, struct channel_subsystem, device)
+
+extern struct channel_subsystem *channel_subsystems[];
+
+/* Helper functions to build lists for the slow path. */
+void css_schedule_eval(struct subchannel_id schid);
+void css_schedule_eval_all(void);
+void css_schedule_eval_all_unreg(unsigned long delay);
+int css_complete_work(void);
+
+int sch_is_pseudo_sch(struct subchannel *);
+struct schib;
+int css_sch_is_valid(struct schib *);
+
+extern struct workqueue_struct *cio_work_q;
+void css_wait_for_slow_path(void);
+void css_sched_sch_todo(struct subchannel *sch, enum sch_todo todo);
+#endif