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Commit fd5ada04 authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

s390/time: remove ETR support 



The External-Time-Reference (ETR) clock synchronization interface has
been superseded by Server-Time-Protocol (STP). Remove the outdated
ETR interface.

Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 936cc855

arch/s390/include/asm/etr.h

deleted100644 → 0
+0 −229
Original line number Diff line number Diff line 
/*

 *  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));



/* Inline assembly helper functions */

static inline int etr_setr(struct etr_eacr *ctrl)

{

	int rc = -EOPNOTSUPP;



	asm volatile(

		"	.insn	s,0xb2160000,%1\n"

		"0:	la	%0,0\n"

		"1:\n"

		EX_TABLE(0b,1b)

		: "+d" (rc) : "Q" (*ctrl));

	return rc;

}



/* Stores a format 1 aib with 64 bytes */

static inline int etr_stetr(struct etr_aib *aib)

{

	int rc = -EOPNOTSUPP;



	asm volatile(

		"	.insn	s,0xb2170000,%1\n"

		"0:	la	%0,0\n"

		"1:\n"

		EX_TABLE(0b,1b)

		: "+d" (rc) : "Q" (*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 = -EOPNOTSUPP;



	asm volatile(

		"	.insn	s,0xb2b30000,%1\n"

		"0:	la	%0,0\n"

		"1:\n"

		EX_TABLE(0b,1b)

		: "+d" (rc) : "Q" (*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



/* Functions needed by the machine check handler */

int etr_switch_to_local(void);

int etr_sync_check(void);

void etr_queue_work(void);



/* notifier for syncs */

extern struct atomic_notifier_head s390_epoch_delta_notifier;



/* 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 */

int stp_sync_check(void);

int stp_island_check(void);

void stp_queue_work(void);



#endif /* __S390_ETR_H */

arch/s390/include/asm/stp.h

0 → 100644
+51 −0
Original line number Diff line number Diff line 
/*

 *  Copyright IBM Corp. 2006

 *  Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)

 */

#ifndef __S390_STP_H

#define __S390_STP_H



/* notifier for syncs */

extern struct atomic_notifier_head s390_epoch_delta_notifier;



/* 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 */

int stp_sync_check(void);

int stp_island_check(void);

void stp_queue_work(void);



#endif /* __S390_STP_H */

arch/s390/kernel/nmi.c

+2 −11
Original line number Diff line number Diff line
@@ -16,7 +16,7 @@ 
#include <linux/module.h>

#include <asm/lowcore.h>

#include <asm/smp.h>

#include <asm/etr.h>

#include <asm/stp.h>

#include <asm/cputime.h>

#include <asm/nmi.h>

#include <asm/crw.h>
@@ -27,7 +27,6 @@ struct mcck_struct { 
	unsigned int kill_task : 1;

	unsigned int channel_report : 1;

	unsigned int warning : 1;

	unsigned int etr_queue : 1;

	unsigned int stp_queue : 1;

	unsigned long mcck_code;

};
@@ -82,8 +81,6 @@ void s390_handle_mcck(void) 
		if (xchg(&mchchk_wng_posted, 1) == 0)

			kill_cad_pid(SIGPWR, 1);

	}

	if (mcck.etr_queue)

		etr_queue_work();

	if (mcck.stp_queue)

		stp_queue_work();

	if (mcck.kill_task) {
@@ -241,8 +238,6 @@ static int notrace s390_validate_registers(union mci mci) 


#define ED_STP_ISLAND	6	/* External damage STP island check */

#define ED_STP_SYNC	7	/* External damage STP sync check */

#define ED_ETR_SYNC	12	/* External damage ETR sync check */

#define ED_ETR_SWITCH	13	/* External damage ETR switch to local */



/*

 * machine check handler.
@@ -325,15 +320,11 @@ void notrace s390_do_machine_check(struct pt_regs *regs) 
	}

	if (mci.ed && mci.ec) {

		/* External damage */

		if (S390_lowcore.external_damage_code & (1U << ED_ETR_SYNC))

			mcck->etr_queue |= etr_sync_check();

		if (S390_lowcore.external_damage_code & (1U << ED_ETR_SWITCH))

			mcck->etr_queue |= etr_switch_to_local();

		if (S390_lowcore.external_damage_code & (1U << ED_STP_SYNC))

			mcck->stp_queue |= stp_sync_check();

		if (S390_lowcore.external_damage_code & (1U << ED_STP_ISLAND))

			mcck->stp_queue |= stp_island_check();

		if (mcck->etr_queue || mcck->stp_queue)

		if (mcck->stp_queue)

			set_cpu_flag(CIF_MCCK_PENDING);

	}

	if (mci.se)