linux/arch/s390/include/asm/etr.h
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   1/*
   2 *  Copyright IBM Corp. 2006
   3 *  Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
   4 */
   5#ifndef __S390_ETR_H
   6#define __S390_ETR_H
   7
   8/* ETR attachment control register */
   9struct etr_eacr {
  10        unsigned int e0         : 1;    /* port 0 stepping control */
  11        unsigned int e1         : 1;    /* port 1 stepping control */
  12        unsigned int _pad0      : 5;    /* must be 00100 */
  13        unsigned int dp         : 1;    /* data port control */
  14        unsigned int p0         : 1;    /* port 0 change recognition control */
  15        unsigned int p1         : 1;    /* port 1 change recognition control */
  16        unsigned int _pad1      : 3;    /* must be 000 */
  17        unsigned int ea         : 1;    /* ETR alert control */
  18        unsigned int es         : 1;    /* ETR sync check control */
  19        unsigned int sl         : 1;    /* switch to local control */
  20} __attribute__ ((packed));
  21
  22/* Port state returned by steai */
  23enum etr_psc {
  24        etr_psc_operational = 0,
  25        etr_psc_semi_operational = 1,
  26        etr_psc_protocol_error =  4,
  27        etr_psc_no_symbols = 8,
  28        etr_psc_no_signal = 12,
  29        etr_psc_pps_mode = 13
  30};
  31
  32/* Logical port state returned by stetr */
  33enum etr_lpsc {
  34        etr_lpsc_operational_step = 0,
  35        etr_lpsc_operational_alt = 1,
  36        etr_lpsc_semi_operational = 2,
  37        etr_lpsc_protocol_error =  4,
  38        etr_lpsc_no_symbol_sync = 8,
  39        etr_lpsc_no_signal = 12,
  40        etr_lpsc_pps_mode = 13
  41};
  42
  43/* ETR status words */
  44struct etr_esw {
  45        struct etr_eacr eacr;           /* attachment control register */
  46        unsigned int y          : 1;    /* stepping mode */
  47        unsigned int _pad0      : 5;    /* must be 00000 */
  48        unsigned int p          : 1;    /* stepping port number */
  49        unsigned int q          : 1;    /* data port number */
  50        unsigned int psc0       : 4;    /* port 0 state code */
  51        unsigned int psc1       : 4;    /* port 1 state code */
  52} __attribute__ ((packed));
  53
  54/* Second level data register status word */
  55struct etr_slsw {
  56        unsigned int vv1        : 1;    /* copy of validity bit data frame 1 */
  57        unsigned int vv2        : 1;    /* copy of validity bit data frame 2 */
  58        unsigned int vv3        : 1;    /* copy of validity bit data frame 3 */
  59        unsigned int vv4        : 1;    /* copy of validity bit data frame 4 */
  60        unsigned int _pad0      : 19;   /* must by all zeroes */
  61        unsigned int n          : 1;    /* EAF port number */
  62        unsigned int v1         : 1;    /* validity bit ETR data frame 1 */
  63        unsigned int v2         : 1;    /* validity bit ETR data frame 2 */
  64        unsigned int v3         : 1;    /* validity bit ETR data frame 3 */
  65        unsigned int v4         : 1;    /* validity bit ETR data frame 4 */
  66        unsigned int _pad1      : 4;    /* must be 0000 */
  67} __attribute__ ((packed));
  68
  69/* ETR data frames */
  70struct etr_edf1 {
  71        unsigned int u          : 1;    /* untuned bit */
  72        unsigned int _pad0      : 1;    /* must be 0 */
  73        unsigned int r          : 1;    /* service request bit */
  74        unsigned int _pad1      : 4;    /* must be 0000 */
  75        unsigned int a          : 1;    /* time adjustment bit */
  76        unsigned int net_id     : 8;    /* ETR network id */
  77        unsigned int etr_id     : 8;    /* id of ETR which sends data frames */
  78        unsigned int etr_pn     : 8;    /* port number of ETR output port */
  79} __attribute__ ((packed));
  80
  81struct etr_edf2 {
  82        unsigned int etv        : 32;   /* Upper 32 bits of TOD. */
  83} __attribute__ ((packed));
  84
  85struct etr_edf3 {
  86        unsigned int rc         : 8;    /* failure reason code */
  87        unsigned int _pad0      : 3;    /* must be 000 */
  88        unsigned int c          : 1;    /* ETR coupled bit */
  89        unsigned int tc         : 4;    /* ETR type code */
  90        unsigned int blto       : 8;    /* biased local time offset */
  91                                        /* (blto - 128) * 15 = minutes */
  92        unsigned int buo        : 8;    /* biased utc offset */
  93                                        /* (buo - 128) = leap seconds */
  94} __attribute__ ((packed));
  95
  96struct etr_edf4 {
  97        unsigned int ed         : 8;    /* ETS device dependent data */
  98        unsigned int _pad0      : 1;    /* must be 0 */
  99        unsigned int buc        : 5;    /* biased ut1 correction */
 100                                        /* (buc - 16) * 0.1 seconds */
 101        unsigned int em         : 6;    /* ETS error magnitude */
 102        unsigned int dc         : 6;    /* ETS drift code */
 103        unsigned int sc         : 6;    /* ETS steering code */
 104} __attribute__ ((packed));
 105
 106/*
 107 * ETR attachment information block, two formats
 108 * format 1 has 4 reserved words with a size of 64 bytes
 109 * format 2 has 16 reserved words with a size of 96 bytes
 110 */
 111struct etr_aib {
 112        struct etr_esw esw;
 113        struct etr_slsw slsw;
 114        unsigned long long tsp;
 115        struct etr_edf1 edf1;
 116        struct etr_edf2 edf2;
 117        struct etr_edf3 edf3;
 118        struct etr_edf4 edf4;
 119        unsigned int reserved[16];
 120} __attribute__ ((packed,aligned(8)));
 121
 122/* ETR interruption parameter */
 123struct etr_irq_parm {
 124        unsigned int _pad0      : 8;
 125        unsigned int pc0        : 1;    /* port 0 state change */
 126        unsigned int pc1        : 1;    /* port 1 state change */
 127        unsigned int _pad1      : 3;
 128        unsigned int eai        : 1;    /* ETR alert indication */
 129        unsigned int _pad2      : 18;
 130} __attribute__ ((packed));
 131
 132/* Query TOD offset result */
 133struct etr_ptff_qto {
 134        unsigned long long physical_clock;
 135        unsigned long long tod_offset;
 136        unsigned long long logical_tod_offset;
 137        unsigned long long tod_epoch_difference;
 138} __attribute__ ((packed));
 139
 140/* Inline assembly helper functions */
 141static inline int etr_setr(struct etr_eacr *ctrl)
 142{
 143        int rc = -EOPNOTSUPP;
 144
 145        asm volatile(
 146                "       .insn   s,0xb2160000,%1\n"
 147                "0:     la      %0,0\n"
 148                "1:\n"
 149                EX_TABLE(0b,1b)
 150                : "+d" (rc) : "Q" (*ctrl));
 151        return rc;
 152}
 153
 154/* Stores a format 1 aib with 64 bytes */
 155static inline int etr_stetr(struct etr_aib *aib)
 156{
 157        int rc = -EOPNOTSUPP;
 158
 159        asm volatile(
 160                "       .insn   s,0xb2170000,%1\n"
 161                "0:     la      %0,0\n"
 162                "1:\n"
 163                EX_TABLE(0b,1b)
 164                : "+d" (rc) : "Q" (*aib));
 165        return rc;
 166}
 167
 168/* Stores a format 2 aib with 96 bytes for specified port */
 169static inline int etr_steai(struct etr_aib *aib, unsigned int func)
 170{
 171        register unsigned int reg0 asm("0") = func;
 172        int rc = -EOPNOTSUPP;
 173
 174        asm volatile(
 175                "       .insn   s,0xb2b30000,%1\n"
 176                "0:     la      %0,0\n"
 177                "1:\n"
 178                EX_TABLE(0b,1b)
 179                : "+d" (rc) : "Q" (*aib), "d" (reg0));
 180        return rc;
 181}
 182
 183/* Function codes for the steai instruction. */
 184#define ETR_STEAI_STEPPING_PORT         0x10
 185#define ETR_STEAI_ALTERNATE_PORT        0x11
 186#define ETR_STEAI_PORT_0                0x12
 187#define ETR_STEAI_PORT_1                0x13
 188
 189static inline int etr_ptff(void *ptff_block, unsigned int func)
 190{
 191        register unsigned int reg0 asm("0") = func;
 192        register unsigned long reg1 asm("1") = (unsigned long) ptff_block;
 193        int rc = -EOPNOTSUPP;
 194
 195        asm volatile(
 196                "       .word   0x0104\n"
 197                "       ipm     %0\n"
 198                "       srl     %0,28\n"
 199                : "=d" (rc), "=m" (ptff_block)
 200                : "d" (reg0), "d" (reg1), "m" (ptff_block) : "cc");
 201        return rc;
 202}
 203
 204/* Function codes for the ptff instruction. */
 205#define ETR_PTFF_QAF    0x00    /* query available functions */
 206#define ETR_PTFF_QTO    0x01    /* query tod offset */
 207#define ETR_PTFF_QSI    0x02    /* query steering information */
 208#define ETR_PTFF_ATO    0x40    /* adjust tod offset */
 209#define ETR_PTFF_STO    0x41    /* set tod offset */
 210#define ETR_PTFF_SFS    0x42    /* set fine steering rate */
 211#define ETR_PTFF_SGS    0x43    /* set gross steering rate */
 212
 213/* Functions needed by the machine check handler */
 214void etr_switch_to_local(void);
 215void etr_sync_check(void);
 216
 217/* notifier for syncs */
 218extern struct atomic_notifier_head s390_epoch_delta_notifier;
 219
 220/* STP interruption parameter */
 221struct stp_irq_parm {
 222        unsigned int _pad0      : 14;
 223        unsigned int tsc        : 1;    /* Timing status change */
 224        unsigned int lac        : 1;    /* Link availability change */
 225        unsigned int tcpc       : 1;    /* Time control parameter change */
 226        unsigned int _pad2      : 15;
 227} __attribute__ ((packed));
 228
 229#define STP_OP_SYNC     1
 230#define STP_OP_CTRL     3
 231
 232struct stp_sstpi {
 233        unsigned int rsvd0;
 234        unsigned int rsvd1 : 8;
 235        unsigned int stratum : 8;
 236        unsigned int vbits : 16;
 237        unsigned int leaps : 16;
 238        unsigned int tmd : 4;
 239        unsigned int ctn : 4;
 240        unsigned int rsvd2 : 3;
 241        unsigned int c : 1;
 242        unsigned int tst : 4;
 243        unsigned int tzo : 16;
 244        unsigned int dsto : 16;
 245        unsigned int ctrl : 16;
 246        unsigned int rsvd3 : 16;
 247        unsigned int tto;
 248        unsigned int rsvd4;
 249        unsigned int ctnid[3];
 250        unsigned int rsvd5;
 251        unsigned int todoff[4];
 252        unsigned int rsvd6[48];
 253} __attribute__ ((packed));
 254
 255/* Functions needed by the machine check handler */
 256void stp_sync_check(void);
 257void stp_island_check(void);
 258
 259#endif /* __S390_ETR_H */
 260
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