text: #ifndef S390_CHSC_H
  #define S390_CHSC_H
  
  #include <linux/types.h>
  #include <linux/device.h>
  #include <asm/chpid.h>
  #include "schid.h"
  
  #define CHSC_SDA_OC_MSS   0x2
  
  struct chsc_header {
  	u16 length;
  	u16 code;
  } __attribute__ ((packed));
  
  #define NR_MEASUREMENT_CHARS 5
  struct cmg_chars {
  	u32 values[NR_MEASUREMENT_CHARS];
  } __attribute__ ((packed));
  
  #define NR_MEASUREMENT_ENTRIES 8
  struct cmg_entry {
  	u32 values[NR_MEASUREMENT_ENTRIES];
  } __attribute__ ((packed));
  
  struct channel_path_desc {
  	u8 flags;
  	u8 lsn;
  	u8 desc;
  	u8 chpid;
  	u8 swla;
  	u8 zeroes;
  	u8 chla;
  	u8 chpp;
  } __attribute__ ((packed));
  
  struct channel_path;
  
  extern void chsc_process_crw(void);
  
  struct css_general_char {
  	u64 : 41;
  	u32 aif : 1;     /* bit 41 */
  	u32 : 3;
  	u32 mcss : 1;    /* bit 45 */
  	u32 : 2;
  	u32 ext_mb : 1;  /* bit 48 */
  	u32 : 7;
  	u32 aif_tdd : 1; /* bit 56 */
  	u32 : 1;
  	u32 qebsm : 1;   /* bit 58 */
  	u32 : 8;
  	u32 aif_osa : 1; /* bit 67 */
  	u32 : 28;
  }__attribute__((packed));
  
  struct css_chsc_char {
  	u64 res;
  	u64 : 20;
  	u32 secm : 1; /* bit 84 */
  	u32 : 1;
  	u32 scmc : 1; /* bit 86 */
  	u32 : 20;
  	u32 scssc : 1;  /* bit 107 */
  	u32 scsscf : 1; /* bit 108 */
  	u32 : 19;
  }__attribute__((packed));
  
  extern struct css_general_char css_general_characteristics;
  extern struct css_chsc_char css_chsc_characteristics;
  
  struct chsc_ssd_info {
  	u8 path_mask;
  	u8 fla_valid_mask;
  	struct chp_id chpid[8];
  	u16 fla[8];
  };
  extern int chsc_get_ssd_info(struct subchannel_id schid,
  			     struct chsc_ssd_info *ssd);
  extern int chsc_determine_css_characteristics(void);
  extern int css_characteristics_avail;
  extern int chsc_alloc_sei_area(void);
  extern void chsc_free_sei_area(void);
  
  extern int chsc_enable_facility(int);
  struct channel_subsystem;
  extern int chsc_secm(struct channel_subsystem *, int);
  
  int chsc_chp_vary(struct chp_id chpid, int on);
  int chsc_determine_channel_path_description(struct chp_id chpid,
  					    struct channel_path_desc *desc);
  void chsc_chp_online(struct chp_id chpid);
  void chsc_chp_offline(struct chp_id chpid);
  int chsc_get_channel_measurement_chars(struct channel_path *chp);
  
  #endif
  