#ifndef S390_CHSC_H
  #define S390_CHSC_H
  
  #include <linux/types.h>
  #include <linux/device.h>
  #include <asm/css_chars.h>
  #include <asm/chpid.h>
  #include <asm/chsc.h>
  #include <asm/schid.h>
  #include <asm/qdio.h>
  
  #define CHSC_SDA_OC_MSS   0x2
  
  #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_fmt1 {
  	u8 flags;
  	u8 lsn;
  	u8 desc;
  	u8 chpid;
  	u32:24;
  	u8 chpp;
  	u32 unused[2];
  	u16 chid;
  	u32:16;
  	u16 mdc;
  	u16:13;
  	u8 r:1;
  	u8 s:1;
  	u8 f:1;
  	u32 zeros[2];
  } __attribute__ ((packed));
  
  struct channel_path;
  
  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 */
  	u32:7;
  	u32 pnso:1; /* bit 116 */
  	u32:11;
  }__attribute__((packed));
  
  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];
  };
  
  struct chsc_ssqd_area {
  	struct chsc_header request;
  	u16:10;
  	u8 ssid:2;
  	u8 fmt:4;
  	u16 first_sch;
  	u16:16;
  	u16 last_sch;
  	u32:32;
  	struct chsc_header response;
  	u32:32;
  	struct qdio_ssqd_desc qdio_ssqd;
  } __packed;
  
  struct chsc_scssc_area {
  	struct chsc_header request;
  	u16 operation_code;
  	u16:16;
  	u32:32;
  	u32:32;
  	u64 summary_indicator_addr;
  	u64 subchannel_indicator_addr;
  	u32 ks:4;
  	u32 kc:4;
  	u32:21;
  	u32 isc:3;
  	u32 word_with_d_bit;
  	u32:32;
  	struct subchannel_id schid;
  	u32 reserved[1004];
  	struct chsc_header response;
  	u32:32;
  } __packed;
  
  struct chsc_scpd {
  	struct chsc_header request;
  	u32:2;
  	u32 m:1;
  	u32 c:1;
  	u32 fmt:4;
  	u32 cssid:8;
  	u32:4;
  	u32 rfmt:4;
  	u32 first_chpid:8;
  	u32:24;
  	u32 last_chpid:8;
  	u32 zeroes1;
  	struct chsc_header response;
  	u8 data[PAGE_SIZE - 20];
  } __attribute__ ((packed));
  
  struct chsc_sda_area {
  	struct chsc_header request;
  	u8 :4;
  	u8 format:4;
  	u8 :8;
  	u16 operation_code;
  	u32 :32;
  	u32 :32;
  	u32 operation_data_area[252];
  	struct chsc_header response;
  	u32 :4;
  	u32 format2:4;
  	u32 :24;
  } __packed __aligned(PAGE_SIZE);
  
  extern int chsc_get_ssd_info(struct subchannel_id schid,
  			     struct chsc_ssd_info *ssd);
  extern int chsc_determine_css_characteristics(void);
  extern int chsc_init(void);
  extern void chsc_init_cleanup(void);
  
  int __chsc_enable_facility(struct chsc_sda_area *sda_area, int operation_code);
  extern int chsc_enable_facility(int);
  struct channel_subsystem;
  extern int chsc_secm(struct channel_subsystem *, int);
  int __chsc_do_secm(struct channel_subsystem *css, int enable);
  
  int chsc_chp_vary(struct chp_id chpid, int on);
  int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
  				     int c, int m, void *page);
  int chsc_determine_base_channel_path_desc(struct chp_id chpid,
  					  struct channel_path_desc *desc);
  int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
  					  struct channel_path_desc_fmt1 *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);
  int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd);
  int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
  	      u64 summary_indicator_addr, u64 subchannel_indicator_addr);
  int chsc_error_from_response(int response);
  
  int chsc_siosl(struct subchannel_id schid);
  
  /* Functions and definitions to query storage-class memory. */
  struct sale {
  	u64 sa;
  	u32 p:4;
  	u32 op_state:4;
  	u32 data_state:4;
  	u32 rank:4;
  	u32 r:1;
  	u32:7;
  	u32 rid:8;
  	u32:32;
  } __packed;
  
  struct chsc_scm_info {
  	struct chsc_header request;
  	u32:32;
  	u64 reqtok;
  	u32 reserved1[4];
  	struct chsc_header response;
  	u64:56;
  	u8 rq;
  	u32 mbc;
  	u64 msa;
  	u16 is;
  	u16 mmc;
  	u32 mci;
  	u64 nr_scm_ini;
  	u64 nr_scm_unini;
  	u32 reserved2[10];
  	u64 restok;
  	struct sale scmal[248];
  } __packed;
  
  int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
  
  struct chsc_brinfo_resume_token {
  	u64 t1;
  	u64 t2;
  } __packed;
  
  struct chsc_brinfo_naihdr {
  	struct chsc_brinfo_resume_token resume_token;
  	u32:32;
  	u32 instance;
  	u32:24;
  	u8 naids;
  	u32 reserved[3];
  } __packed;
  
  struct chsc_pnso_area {
  	struct chsc_header request;
  	u8:2;
  	u8 m:1;
  	u8:5;
  	u8:2;
  	u8 ssid:2;
  	u8 fmt:4;
  	u16 sch;
  	u8:8;
  	u8 cssid;
  	u16:16;
  	u8 oc;
  	u32:24;
  	struct chsc_brinfo_resume_token resume_token;
  	u32 n:1;
  	u32:31;
  	u32 reserved[3];
  	struct chsc_header response;
  	u32:32;
  	struct chsc_brinfo_naihdr naihdr;
  	union {
  		struct qdio_brinfo_entry_l3_ipv6 l3_ipv6[0];
  		struct qdio_brinfo_entry_l3_ipv4 l3_ipv4[0];
  		struct qdio_brinfo_entry_l2	 l2[0];
  	} entries;
  } __packed;
  
  int chsc_pnso_brinfo(struct subchannel_id schid,
  		struct chsc_pnso_area *brinfo_area,
  		struct chsc_brinfo_resume_token resume_token,
  		int cnc);
  
  #ifdef CONFIG_SCM_BUS
  int scm_update_information(void);
  int scm_process_availability_information(void);
  #else /* CONFIG_SCM_BUS */
  static inline int scm_update_information(void) { return 0; }
  static inline int scm_process_availability_information(void) { return 0; }
  #endif /* CONFIG_SCM_BUS */
  
  
  #endif