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kernel/linux-imx6_3.14.28/drivers/s390/cio/chp.h 1.78 KB
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  /*
   *    Copyright IBM Corp. 2007, 2010
   *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
   */
  
  #ifndef S390_CHP_H
  #define S390_CHP_H S390_CHP_H
  
  #include <linux/types.h>
  #include <linux/device.h>
  #include <linux/mutex.h>
  #include <asm/chpid.h>
  #include "chsc.h"
  #include "css.h"
  
  #define CHP_STATUS_STANDBY		0
  #define CHP_STATUS_CONFIGURED		1
  #define CHP_STATUS_RESERVED		2
  #define CHP_STATUS_NOT_RECOGNIZED	3
  
  #define CHP_ONLINE 0
  #define CHP_OFFLINE 1
  #define CHP_VARY_ON 2
  #define CHP_VARY_OFF 3
  
  struct chp_link {
  	struct chp_id chpid;
  	u32 fla_mask;
  	u16 fla;
  };
  
  static inline int chp_test_bit(u8 *bitmap, int num)
  {
  	int byte = num >> 3;
  	int mask = 128 >> (num & 7);
  
  	return (bitmap[byte] & mask) ? 1 : 0;
  }
  
  
  struct channel_path {
  	struct device dev;
  	struct chp_id chpid;
  	struct mutex lock; /* Serialize access to below members. */
  	int state;
  	struct channel_path_desc desc;
  	struct channel_path_desc_fmt1 desc_fmt1;
  	/* Channel-measurement related stuff: */
  	int cmg;
  	int shared;
  	void *cmg_chars;
  };
  
  /* Return channel_path struct for given chpid. */
  static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
  {
  	return channel_subsystems[chpid.cssid]->chps[chpid.id];
  }
  
  int chp_get_status(struct chp_id chpid);
  u8 chp_get_sch_opm(struct subchannel *sch);
  int chp_is_registered(struct chp_id chpid);
  void *chp_get_chp_desc(struct chp_id chpid);
  void chp_remove_cmg_attr(struct channel_path *chp);
  int chp_add_cmg_attr(struct channel_path *chp);
  int chp_update_desc(struct channel_path *chp);
  int chp_new(struct chp_id chpid);
  void chp_cfg_schedule(struct chp_id chpid, int configure);
  void chp_cfg_cancel_deconfigure(struct chp_id chpid);
  int chp_info_get_status(struct chp_id chpid);
  int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
  #endif /* S390_CHP_H */