drivers/s390/cio/chsc.h

   1 #ifndef S390_CHSC_H
   2 #define S390_CHSC_H
   3
   4 #define CHSC_SEI_ACC_CHPID        1
   5 #define CHSC_SEI_ACC_LINKADDR     2
   6 #define CHSC_SEI_ACC_FULLLINKADDR 3
   7
   8 #define CHSC_SDA_OC_MSS   0x2
   9
  10 struct chsc_header {
  11         u16 length;
  12         u16 code;
  13 };
  14
  15 struct channel_path_desc {
  16         u8 flags;
  17         u8 lsn;
  18         u8 desc;
  19         u8 chpid;
  20         u8 swla;
  21         u8 zeroes;
  22         u8 chla;
  23         u8 chpp;
  24 };
  25
  26 struct channel_path {
  27         int id;
  28         int state;
  29         struct channel_path_desc desc;
  30         struct device dev;
  31 };
  32
  33 extern void s390_process_css( void );
  34 extern void chsc_validate_chpids(struct subchannel *);
  35 extern void chpid_is_actually_online(int);
  36
  37 struct css_general_char {
  38         u64 : 41;
  39         u32 aif : 1;     /* bit 41 */
  40         u32 : 3;
  41         u32 mcss : 1;    /* bit 45 */
  42         u32 : 2;
  43         u32 ext_mb : 1;  /* bit 48 */
  44         u32 : 7;
  45         u32 aif_tdd : 1; /* bit 56 */
  46         u32 : 1;
  47         u32 qebsm : 1;   /* bit 58 */
  48         u32 : 8;
  49         u32 aif_osa : 1; /* bit 67 */
  50         u32 : 28;
  51 }__attribute__((packed));
  52
  53 struct css_chsc_char {
  54         u64 res;
  55         u64 : 43;
  56         u32 scssc : 1;  /* bit 107 */
  57         u32 scsscf : 1; /* bit 108 */
  58         u32 : 19;
  59 }__attribute__((packed));
  60
  61 extern struct css_general_char css_general_characteristics;
  62 extern struct css_chsc_char css_chsc_characteristics;
  63
  64 extern int chsc_determine_css_characteristics(void);
  65 extern int css_characteristics_avail;
  66
  67 extern void *chsc_get_chp_desc(struct subchannel*, int);
  68
  69 extern int chsc_enable_facility(int);
  70
  71 #define to_channelpath(device) container_of(device, struct channel_path, dev)
  72
  73 #endif