arch/s390/include/asm/etr.h

   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 */
   9 struct 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 */
  23 enum 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 */
  33 enum 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 */
  44 struct 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 */
  55 struct 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 */
  70 struct 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
  81 struct etr_edf2 {
  82         unsigned int etv        : 32;   /* Upper 32 bits of TOD. */
  83 } __attribute__ ((packed));
  84
  85 struct 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
  96 struct 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  */
 111 struct 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 */
 123 struct 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 */
 133 struct 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 */
 141 static 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 */
 155 static 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 */
 169 static 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
 189 static 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 */
 214 int etr_switch_to_local(void);
 215 int etr_sync_check(void);
 216 void etr_queue_work(void);
 217
 218 /* notifier for syncs */
 219 extern struct atomic_notifier_head s390_epoch_delta_notifier;
 220
 221 /* STP interruption parameter */
 222 struct stp_irq_parm {
 223         unsigned int _pad0      : 14;
 224         unsigned int tsc        : 1;    /* Timing status change */
 225         unsigned int lac        : 1;    /* Link availability change */
 226         unsigned int tcpc       : 1;    /* Time control parameter change */
 227         unsigned int _pad2      : 15;
 228 } __attribute__ ((packed));
 229
 230 #define STP_OP_SYNC     1
 231 #define STP_OP_CTRL     3
 232
 233 struct stp_sstpi {
 234         unsigned int rsvd0;
 235         unsigned int rsvd1 : 8;
 236         unsigned int stratum : 8;
 237         unsigned int vbits : 16;
 238         unsigned int leaps : 16;
 239         unsigned int tmd : 4;
 240         unsigned int ctn : 4;
 241         unsigned int rsvd2 : 3;
 242         unsigned int c : 1;
 243         unsigned int tst : 4;
 244         unsigned int tzo : 16;
 245         unsigned int dsto : 16;
 246         unsigned int ctrl : 16;
 247         unsigned int rsvd3 : 16;
 248         unsigned int tto;
 249         unsigned int rsvd4;
 250         unsigned int ctnid[3];
 251         unsigned int rsvd5;
 252         unsigned int todoff[4];
 253         unsigned int rsvd6[48];
 254 } __attribute__ ((packed));
 255
 256 /* Functions needed by the machine check handler */
 257 int stp_sync_check(void);
 258 int stp_island_check(void);
 259 void stp_queue_work(void);
 260
 261 #endif /* __S390_ETR_H */