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ccwdev.h

/*
 *  include/asm-s390/ccwdev.h
 *  include/asm-s390x/ccwdev.h
 *
 *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
 *    Author(s): Arnd Bergmann <arndb@de.ibm.com>
 *
 *  Interface for CCW device drivers
 */
#ifndef _S390_CCWDEV_H_
#define _S390_CCWDEV_H_

#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <asm/fcx.h>

/* structs from asm/cio.h */
struct irb;
struct ccw1;
struct ccw_dev_id;

/* simplified initializers for struct ccw_device:
 * CCW_DEVICE and CCW_DEVICE_DEVTYPE initialize one
 * entry in your MODULE_DEVICE_TABLE and set the match_flag correctly */
#define CCW_DEVICE(cu, cum)                                 \
      .cu_type=(cu), .cu_model=(cum),                             \
      .match_flags=(CCW_DEVICE_ID_MATCH_CU_TYPE             \
               | (cum ? CCW_DEVICE_ID_MATCH_CU_MODEL : 0))

#define CCW_DEVICE_DEVTYPE(cu, cum, dev, devm)                    \
      .cu_type=(cu), .cu_model=(cum), .dev_type=(dev), .dev_model=(devm),\
      .match_flags=CCW_DEVICE_ID_MATCH_CU_TYPE              \
               | ((cum) ? CCW_DEVICE_ID_MATCH_CU_MODEL : 0)       \
               | CCW_DEVICE_ID_MATCH_DEVICE_TYPE                  \
               | ((devm) ? CCW_DEVICE_ID_MATCH_DEVICE_MODEL : 0)

/* scan through an array of device ids and return the first
 * entry that matches the device.
 *
 * the array must end with an entry containing zero match_flags
 */
static inline const struct ccw_device_id *
ccw_device_id_match(const struct ccw_device_id *array,
                  const struct ccw_device_id *match)
{
      const struct ccw_device_id *id = array;

      for (id = array; id->match_flags; id++) {
            if ((id->match_flags & CCW_DEVICE_ID_MATCH_CU_TYPE)
                && (id->cu_type != match->cu_type))
                  continue;

            if ((id->match_flags & CCW_DEVICE_ID_MATCH_CU_MODEL)
                && (id->cu_model != match->cu_model))
                  continue;

            if ((id->match_flags & CCW_DEVICE_ID_MATCH_DEVICE_TYPE)
                && (id->dev_type != match->dev_type))
                  continue;

            if ((id->match_flags & CCW_DEVICE_ID_MATCH_DEVICE_MODEL)
                && (id->dev_model != match->dev_model))
                  continue;

            return id;
      }

      return NULL;
}

/**
 * struct ccw_device - channel attached device
 * @ccwlock: pointer to device lock
 * @id: id of this device
 * @drv: ccw driver for this device
 * @dev: embedded device structure
 * @online: online status of device
 * @handler: interrupt handler
 *
 * @handler is a member of the device rather than the driver since a driver
 * can have different interrupt handlers for different ccw devices
 * (multi-subchannel drivers).
 */
00084 struct ccw_device {
      spinlock_t *ccwlock;
/* private: */
      struct ccw_device_private *private; /* cio private information */
/* public: */
      struct ccw_device_id id;
      struct ccw_driver *drv;
      struct device dev;
      int online;
      void (*handler) (struct ccw_device *, unsigned long, struct irb *);
};


/**
 * struct ccw driver - device driver for channel attached devices
 * @owner: owning module
 * @ids: ids supported by this driver
 * @probe: function called on probe
 * @remove: function called on remove
 * @set_online: called when setting device online
 * @set_offline: called when setting device offline
 * @notify: notify driver of device state changes
 * @shutdown: called at device shutdown
 * @driver: embedded device driver structure
 * @name: device driver name
 */
struct ccw_driver {
      struct module *owner;
      struct ccw_device_id *ids;
      int (*probe) (struct ccw_device *);
      void (*remove) (struct ccw_device *);
      int (*set_online) (struct ccw_device *);
      int (*set_offline) (struct ccw_device *);
      int (*notify) (struct ccw_device *, int);
      void (*shutdown) (struct ccw_device *);
      struct device_driver driver;
      char *name;
};

extern struct ccw_device *get_ccwdev_by_busid(struct ccw_driver *cdrv,
                                    const char *bus_id);

/* devices drivers call these during module load and unload.
 * When a driver is registered, its probe method is called
 * when new devices for its type pop up */
extern int  ccw_driver_register   (struct ccw_driver *driver);
extern void ccw_driver_unregister (struct ccw_driver *driver);

struct ccw1;

extern int ccw_device_set_options_mask(struct ccw_device *, unsigned long);
extern int ccw_device_set_options(struct ccw_device *, unsigned long);
extern void ccw_device_clear_options(struct ccw_device *, unsigned long);

/* Allow for i/o completion notification after primary interrupt status. */
#define CCWDEV_EARLY_NOTIFICATION   0x0001
/* Report all interrupt conditions. */
#define CCWDEV_REPORT_ALL           0x0002
/* Try to perform path grouping. */
#define CCWDEV_DO_PATHGROUP             0x0004
/* Allow forced onlining of boxed devices. */
#define CCWDEV_ALLOW_FORCE              0x0008

extern int ccw_device_start(struct ccw_device *, struct ccw1 *,
                      unsigned long, __u8, unsigned long);
extern int ccw_device_start_timeout(struct ccw_device *, struct ccw1 *,
                            unsigned long, __u8, unsigned long, int);
extern int ccw_device_start_key(struct ccw_device *, struct ccw1 *,
                        unsigned long, __u8, __u8, unsigned long);
extern int ccw_device_start_timeout_key(struct ccw_device *, struct ccw1 *,
                              unsigned long, __u8, __u8,
                              unsigned long, int);


extern int ccw_device_resume(struct ccw_device *);
extern int ccw_device_halt(struct ccw_device *, unsigned long);
extern int ccw_device_clear(struct ccw_device *, unsigned long);
int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw,
                      unsigned long intparm, u8 lpm, u8 key);
int ccw_device_tm_start_key(struct ccw_device *, struct tcw *,
                      unsigned long, u8, u8);
int ccw_device_tm_start_timeout_key(struct ccw_device *, struct tcw *,
                      unsigned long, u8, u8, int);
int ccw_device_tm_start(struct ccw_device *, struct tcw *,
                      unsigned long, u8);
int ccw_device_tm_start_timeout(struct ccw_device *, struct tcw *,
                      unsigned long, u8, int);
int ccw_device_tm_intrg(struct ccw_device *cdev);

extern int ccw_device_set_online(struct ccw_device *cdev);
extern int ccw_device_set_offline(struct ccw_device *cdev);


extern struct ciw *ccw_device_get_ciw(struct ccw_device *, __u32 cmd);
extern __u8 ccw_device_get_path_mask(struct ccw_device *);
extern void ccw_device_get_id(struct ccw_device *, struct ccw_dev_id *);

#define get_ccwdev_lock(x) (x)->ccwlock

#define to_ccwdev(n) container_of(n, struct ccw_device, dev)
#define to_ccwdrv(n) container_of(n, struct ccw_driver, driver)

extern struct ccw_device *ccw_device_probe_console(void);

// FIXME: these have to go
extern int _ccw_device_get_subchannel_number(struct ccw_device *);

extern void *ccw_device_get_chp_desc(struct ccw_device *, int);
#endif /* _S390_CCWDEV_H_ */

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