mirror of
https://github.com/torvalds/linux.git
synced 2024-11-15 16:41:58 +00:00
d2fec59551
Add support for clock synchronization with the server time protocol. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
259 lines
7.5 KiB
C
259 lines
7.5 KiB
C
/*
|
|
* include/asm-s390/etr.h
|
|
*
|
|
* Copyright IBM Corp. 2006
|
|
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
|
|
*/
|
|
#ifndef __S390_ETR_H
|
|
#define __S390_ETR_H
|
|
|
|
/* ETR attachment control register */
|
|
struct etr_eacr {
|
|
unsigned int e0 : 1; /* port 0 stepping control */
|
|
unsigned int e1 : 1; /* port 1 stepping control */
|
|
unsigned int _pad0 : 5; /* must be 00100 */
|
|
unsigned int dp : 1; /* data port control */
|
|
unsigned int p0 : 1; /* port 0 change recognition control */
|
|
unsigned int p1 : 1; /* port 1 change recognition control */
|
|
unsigned int _pad1 : 3; /* must be 000 */
|
|
unsigned int ea : 1; /* ETR alert control */
|
|
unsigned int es : 1; /* ETR sync check control */
|
|
unsigned int sl : 1; /* switch to local control */
|
|
} __attribute__ ((packed));
|
|
|
|
/* Port state returned by steai */
|
|
enum etr_psc {
|
|
etr_psc_operational = 0,
|
|
etr_psc_semi_operational = 1,
|
|
etr_psc_protocol_error = 4,
|
|
etr_psc_no_symbols = 8,
|
|
etr_psc_no_signal = 12,
|
|
etr_psc_pps_mode = 13
|
|
};
|
|
|
|
/* Logical port state returned by stetr */
|
|
enum etr_lpsc {
|
|
etr_lpsc_operational_step = 0,
|
|
etr_lpsc_operational_alt = 1,
|
|
etr_lpsc_semi_operational = 2,
|
|
etr_lpsc_protocol_error = 4,
|
|
etr_lpsc_no_symbol_sync = 8,
|
|
etr_lpsc_no_signal = 12,
|
|
etr_lpsc_pps_mode = 13
|
|
};
|
|
|
|
/* ETR status words */
|
|
struct etr_esw {
|
|
struct etr_eacr eacr; /* attachment control register */
|
|
unsigned int y : 1; /* stepping mode */
|
|
unsigned int _pad0 : 5; /* must be 00000 */
|
|
unsigned int p : 1; /* stepping port number */
|
|
unsigned int q : 1; /* data port number */
|
|
unsigned int psc0 : 4; /* port 0 state code */
|
|
unsigned int psc1 : 4; /* port 1 state code */
|
|
} __attribute__ ((packed));
|
|
|
|
/* Second level data register status word */
|
|
struct etr_slsw {
|
|
unsigned int vv1 : 1; /* copy of validity bit data frame 1 */
|
|
unsigned int vv2 : 1; /* copy of validity bit data frame 2 */
|
|
unsigned int vv3 : 1; /* copy of validity bit data frame 3 */
|
|
unsigned int vv4 : 1; /* copy of validity bit data frame 4 */
|
|
unsigned int _pad0 : 19; /* must by all zeroes */
|
|
unsigned int n : 1; /* EAF port number */
|
|
unsigned int v1 : 1; /* validity bit ETR data frame 1 */
|
|
unsigned int v2 : 1; /* validity bit ETR data frame 2 */
|
|
unsigned int v3 : 1; /* validity bit ETR data frame 3 */
|
|
unsigned int v4 : 1; /* validity bit ETR data frame 4 */
|
|
unsigned int _pad1 : 4; /* must be 0000 */
|
|
} __attribute__ ((packed));
|
|
|
|
/* ETR data frames */
|
|
struct etr_edf1 {
|
|
unsigned int u : 1; /* untuned bit */
|
|
unsigned int _pad0 : 1; /* must be 0 */
|
|
unsigned int r : 1; /* service request bit */
|
|
unsigned int _pad1 : 4; /* must be 0000 */
|
|
unsigned int a : 1; /* time adjustment bit */
|
|
unsigned int net_id : 8; /* ETR network id */
|
|
unsigned int etr_id : 8; /* id of ETR which sends data frames */
|
|
unsigned int etr_pn : 8; /* port number of ETR output port */
|
|
} __attribute__ ((packed));
|
|
|
|
struct etr_edf2 {
|
|
unsigned int etv : 32; /* Upper 32 bits of TOD. */
|
|
} __attribute__ ((packed));
|
|
|
|
struct etr_edf3 {
|
|
unsigned int rc : 8; /* failure reason code */
|
|
unsigned int _pad0 : 3; /* must be 000 */
|
|
unsigned int c : 1; /* ETR coupled bit */
|
|
unsigned int tc : 4; /* ETR type code */
|
|
unsigned int blto : 8; /* biased local time offset */
|
|
/* (blto - 128) * 15 = minutes */
|
|
unsigned int buo : 8; /* biased utc offset */
|
|
/* (buo - 128) = leap seconds */
|
|
} __attribute__ ((packed));
|
|
|
|
struct etr_edf4 {
|
|
unsigned int ed : 8; /* ETS device dependent data */
|
|
unsigned int _pad0 : 1; /* must be 0 */
|
|
unsigned int buc : 5; /* biased ut1 correction */
|
|
/* (buc - 16) * 0.1 seconds */
|
|
unsigned int em : 6; /* ETS error magnitude */
|
|
unsigned int dc : 6; /* ETS drift code */
|
|
unsigned int sc : 6; /* ETS steering code */
|
|
} __attribute__ ((packed));
|
|
|
|
/*
|
|
* ETR attachment information block, two formats
|
|
* format 1 has 4 reserved words with a size of 64 bytes
|
|
* format 2 has 16 reserved words with a size of 96 bytes
|
|
*/
|
|
struct etr_aib {
|
|
struct etr_esw esw;
|
|
struct etr_slsw slsw;
|
|
unsigned long long tsp;
|
|
struct etr_edf1 edf1;
|
|
struct etr_edf2 edf2;
|
|
struct etr_edf3 edf3;
|
|
struct etr_edf4 edf4;
|
|
unsigned int reserved[16];
|
|
} __attribute__ ((packed,aligned(8)));
|
|
|
|
/* ETR interruption parameter */
|
|
struct etr_irq_parm {
|
|
unsigned int _pad0 : 8;
|
|
unsigned int pc0 : 1; /* port 0 state change */
|
|
unsigned int pc1 : 1; /* port 1 state change */
|
|
unsigned int _pad1 : 3;
|
|
unsigned int eai : 1; /* ETR alert indication */
|
|
unsigned int _pad2 : 18;
|
|
} __attribute__ ((packed));
|
|
|
|
/* Query TOD offset result */
|
|
struct etr_ptff_qto {
|
|
unsigned long long physical_clock;
|
|
unsigned long long tod_offset;
|
|
unsigned long long logical_tod_offset;
|
|
unsigned long long tod_epoch_difference;
|
|
} __attribute__ ((packed));
|
|
|
|
/* Inline assembly helper functions */
|
|
static inline int etr_setr(struct etr_eacr *ctrl)
|
|
{
|
|
int rc = -ENOSYS;
|
|
|
|
asm volatile(
|
|
" .insn s,0xb2160000,0(%2)\n"
|
|
"0: la %0,0\n"
|
|
"1:\n"
|
|
EX_TABLE(0b,1b)
|
|
: "+d" (rc) : "m" (*ctrl), "a" (ctrl));
|
|
return rc;
|
|
}
|
|
|
|
/* Stores a format 1 aib with 64 bytes */
|
|
static inline int etr_stetr(struct etr_aib *aib)
|
|
{
|
|
int rc = -ENOSYS;
|
|
|
|
asm volatile(
|
|
" .insn s,0xb2170000,0(%2)\n"
|
|
"0: la %0,0\n"
|
|
"1:\n"
|
|
EX_TABLE(0b,1b)
|
|
: "+d" (rc) : "m" (*aib), "a" (aib));
|
|
return rc;
|
|
}
|
|
|
|
/* Stores a format 2 aib with 96 bytes for specified port */
|
|
static inline int etr_steai(struct etr_aib *aib, unsigned int func)
|
|
{
|
|
register unsigned int reg0 asm("0") = func;
|
|
int rc = -ENOSYS;
|
|
|
|
asm volatile(
|
|
" .insn s,0xb2b30000,0(%2)\n"
|
|
"0: la %0,0\n"
|
|
"1:\n"
|
|
EX_TABLE(0b,1b)
|
|
: "+d" (rc) : "m" (*aib), "a" (aib), "d" (reg0));
|
|
return rc;
|
|
}
|
|
|
|
/* Function codes for the steai instruction. */
|
|
#define ETR_STEAI_STEPPING_PORT 0x10
|
|
#define ETR_STEAI_ALTERNATE_PORT 0x11
|
|
#define ETR_STEAI_PORT_0 0x12
|
|
#define ETR_STEAI_PORT_1 0x13
|
|
|
|
static inline int etr_ptff(void *ptff_block, unsigned int func)
|
|
{
|
|
register unsigned int reg0 asm("0") = func;
|
|
register unsigned long reg1 asm("1") = (unsigned long) ptff_block;
|
|
int rc = -ENOSYS;
|
|
|
|
asm volatile(
|
|
" .word 0x0104\n"
|
|
" ipm %0\n"
|
|
" srl %0,28\n"
|
|
: "=d" (rc), "=m" (ptff_block)
|
|
: "d" (reg0), "d" (reg1), "m" (ptff_block) : "cc");
|
|
return rc;
|
|
}
|
|
|
|
/* Function codes for the ptff instruction. */
|
|
#define ETR_PTFF_QAF 0x00 /* query available functions */
|
|
#define ETR_PTFF_QTO 0x01 /* query tod offset */
|
|
#define ETR_PTFF_QSI 0x02 /* query steering information */
|
|
#define ETR_PTFF_ATO 0x40 /* adjust tod offset */
|
|
#define ETR_PTFF_STO 0x41 /* set tod offset */
|
|
#define ETR_PTFF_SFS 0x42 /* set fine steering rate */
|
|
#define ETR_PTFF_SGS 0x43 /* set gross steering rate */
|
|
|
|
/* Functions needed by the machine check handler */
|
|
void etr_switch_to_local(void);
|
|
void etr_sync_check(void);
|
|
|
|
/* STP interruption parameter */
|
|
struct stp_irq_parm {
|
|
unsigned int _pad0 : 14;
|
|
unsigned int tsc : 1; /* Timing status change */
|
|
unsigned int lac : 1; /* Link availability change */
|
|
unsigned int tcpc : 1; /* Time control parameter change */
|
|
unsigned int _pad2 : 15;
|
|
} __attribute__ ((packed));
|
|
|
|
#define STP_OP_SYNC 1
|
|
#define STP_OP_CTRL 3
|
|
|
|
struct stp_sstpi {
|
|
unsigned int rsvd0;
|
|
unsigned int rsvd1 : 8;
|
|
unsigned int stratum : 8;
|
|
unsigned int vbits : 16;
|
|
unsigned int leaps : 16;
|
|
unsigned int tmd : 4;
|
|
unsigned int ctn : 4;
|
|
unsigned int rsvd2 : 3;
|
|
unsigned int c : 1;
|
|
unsigned int tst : 4;
|
|
unsigned int tzo : 16;
|
|
unsigned int dsto : 16;
|
|
unsigned int ctrl : 16;
|
|
unsigned int rsvd3 : 16;
|
|
unsigned int tto;
|
|
unsigned int rsvd4;
|
|
unsigned int ctnid[3];
|
|
unsigned int rsvd5;
|
|
unsigned int todoff[4];
|
|
unsigned int rsvd6[48];
|
|
} __attribute__ ((packed));
|
|
|
|
/* Functions needed by the machine check handler */
|
|
void stp_sync_check(void);
|
|
void stp_island_check(void);
|
|
|
|
#endif /* __S390_ETR_H */
|