--- /dev/null
+#ifndef S390_IO_SCH_H
+#define S390_IO_SCH_H
+
+#include <linux/types.h>
+#include <asm/schid.h>
+#include <asm/ccwdev.h>
+#include <asm/irq.h>
+#include "css.h"
+#include "orb.h"
+
+struct io_subchannel_private {
+ union orb orb; /* operation request block */
+ struct ccw1 sense_ccw; /* static ccw for sense command */
+ struct ccw_device *cdev;/* pointer to the child ccw device */
+ struct {
+ unsigned int suspend:1; /* allow suspend */
+ unsigned int prefetch:1;/* deny prefetch */
+ unsigned int inter:1; /* suppress intermediate interrupts */
+ } __packed options;
+} __aligned(8);
+
+#define to_io_private(n) ((struct io_subchannel_private *) \
+ dev_get_drvdata(&(n)->dev))
+#define set_io_private(n, p) (dev_set_drvdata(&(n)->dev, p))
+
+static inline struct ccw_device *sch_get_cdev(struct subchannel *sch)
+{
+ struct io_subchannel_private *priv = to_io_private(sch);
+ return priv ? priv->cdev : NULL;
+}
+
+static inline void sch_set_cdev(struct subchannel *sch,
+ struct ccw_device *cdev)
+{
+ struct io_subchannel_private *priv = to_io_private(sch);
+ if (priv)
+ priv->cdev = cdev;
+}
+
+#define MAX_CIWS 8
+
+/*
+ * Possible status values for a CCW request's I/O.
+ */
+enum io_status {
+ IO_DONE,
+ IO_RUNNING,
+ IO_STATUS_ERROR,
+ IO_PATH_ERROR,
+ IO_REJECTED,
+ IO_KILLED
+};
+
+/**
+ * ccw_request - Internal CCW request.
+ * @cp: channel program to start
+ * @timeout: maximum allowable time in jiffies between start I/O and interrupt
+ * @maxretries: number of retries per I/O operation and path
+ * @lpm: mask of paths to use
+ * @check: optional callback that determines if results are final
+ * @filter: optional callback to adjust request status based on IRB data
+ * @callback: final callback
+ * @data: user-defined pointer passed to all callbacks
+ * @singlepath: if set, use only one path from @lpm per start I/O
+ * @cancel: non-zero if request was cancelled
+ * @done: non-zero if request was finished
+ * @mask: current path mask
+ * @retries: current number of retries
+ * @drc: delayed return code
+ */
+struct ccw_request {
+ struct ccw1 *cp;
+ unsigned long timeout;
+ u16 maxretries;
+ u8 lpm;
+ int (*check)(struct ccw_device *, void *);
+ enum io_status (*filter)(struct ccw_device *, void *, struct irb *,
+ enum io_status);
+ void (*callback)(struct ccw_device *, void *, int);
+ void *data;
+ unsigned int singlepath:1;
+ /* These fields are used internally. */
+ unsigned int cancel:1;
+ unsigned int done:1;
+ u16 mask;
+ u16 retries;
+ int drc;
+} __attribute__((packed));
+
+/*
+ * sense-id response buffer layout
+ */
+struct senseid {
+ /* common part */
+ u8 reserved; /* always 0x'FF' */
+ u16 cu_type; /* control unit type */
+ u8 cu_model; /* control unit model */
+ u16 dev_type; /* device type */
+ u8 dev_model; /* device model */
+ u8 unused; /* padding byte */
+ /* extended part */
+ struct ciw ciw[MAX_CIWS]; /* variable # of CIWs */
+} __attribute__ ((packed, aligned(4)));
+
+enum cdev_todo {
+ CDEV_TODO_NOTHING,
+ CDEV_TODO_ENABLE_CMF,
+ CDEV_TODO_REBIND,
+ CDEV_TODO_REGISTER,
+ CDEV_TODO_UNREG,
+ CDEV_TODO_UNREG_EVAL,
+};
+
+#define FAKE_CMD_IRB 1
+#define FAKE_TM_IRB 2
+
+struct ccw_device_private {
+ struct ccw_device *cdev;
+ struct subchannel *sch;
+ int state; /* device state */
+ atomic_t onoff;
+ struct ccw_dev_id dev_id; /* device id */
+ struct subchannel_id schid; /* subchannel number */
+ struct ccw_request req; /* internal I/O request */
+ int iretry;
+ u8 pgid_valid_mask; /* mask of valid PGIDs */
+ u8 pgid_todo_mask; /* mask of PGIDs to be adjusted */
+ u8 pgid_reset_mask; /* mask of PGIDs which were reset */
+ u8 path_noirq_mask; /* mask of paths for which no irq was
+ received */
+ u8 path_notoper_mask; /* mask of paths which were found
+ not operable */
+ u8 path_gone_mask; /* mask of paths, that became unavailable */
+ u8 path_new_mask; /* mask of paths, that became available */
+ struct {
+ unsigned int fast:1; /* post with "channel end" */
+ unsigned int repall:1; /* report every interrupt status */
+ unsigned int pgroup:1; /* do path grouping */
+ unsigned int force:1; /* allow forced online */
+ unsigned int mpath:1; /* do multipathing */
+ } __attribute__ ((packed)) options;
+ struct {
+ unsigned int esid:1; /* Ext. SenseID supported by HW */
+ unsigned int dosense:1; /* delayed SENSE required */
+ unsigned int doverify:1; /* delayed path verification */
+ unsigned int donotify:1; /* call notify function */
+ unsigned int recog_done:1; /* dev. recog. complete */
+ unsigned int fake_irb:2; /* deliver faked irb */
+ unsigned int resuming:1; /* recognition while resume */
+ unsigned int pgroup:1; /* pathgroup is set up */
+ unsigned int mpath:1; /* multipathing is set up */
+ unsigned int pgid_unknown:1;/* unknown pgid state */
+ unsigned int initialized:1; /* set if initial reference held */
+ } __attribute__((packed)) flags;
+ unsigned long intparm; /* user interruption parameter */
+ struct qdio_irq *qdio_data;
+ struct irb irb; /* device status */
+ struct senseid senseid; /* SenseID info */
+ struct pgid pgid[8]; /* path group IDs per chpid*/
+ struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */
+ struct work_struct todo_work;
+ enum cdev_todo todo;
+ wait_queue_head_t wait_q;
+ struct timer_list timer;
+ void *cmb; /* measurement information */
+ struct list_head cmb_list; /* list of measured devices */
+ u64 cmb_start_time; /* clock value of cmb reset */
+ void *cmb_wait; /* deferred cmb enable/disable */
+ enum interruption_class int_class;
+};
+
+static inline int rsch(struct subchannel_id schid)
+{
+ register struct subchannel_id reg1 asm("1") = schid;
+ int ccode;
+
+ asm volatile(
+ " rsch\n"
+ " ipm %0\n"
+ " srl %0,28"
+ : "=d" (ccode)
+ : "d" (reg1)
+ : "cc", "memory");
+ return ccode;
+}
+
+static inline int hsch(struct subchannel_id schid)
+{
+ register struct subchannel_id reg1 asm("1") = schid;
+ int ccode;
+
+ asm volatile(
+ " hsch\n"
+ " ipm %0\n"
+ " srl %0,28"
+ : "=d" (ccode)
+ : "d" (reg1)
+ : "cc");
+ return ccode;
+}
+
+static inline int xsch(struct subchannel_id schid)
+{
+ register struct subchannel_id reg1 asm("1") = schid;
+ int ccode;
+
+ asm volatile(
+ " .insn rre,0xb2760000,%1,0\n"
+ " ipm %0\n"
+ " srl %0,28"
+ : "=d" (ccode)
+ : "d" (reg1)
+ : "cc");
+ return ccode;
+}
+
+#endif
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