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s390/cio: Introduce common I/O layer tracepoints

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Add tracepoints to interrupt handler and core inline assemblies used by
the s390 common I/O layer. These tracepoints can be used to monitor and
validate hardware and hypervisor requests and responses.

Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
tirimbino
Peter Oberparleiter 9 years ago committed by Martin Schwidefsky
parent 2ab59de7c5
commit 42248979d5
6 changed files with 419 additions and 1 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 5
      drivers/s390/cio/Makefile
  2. 1
      drivers/s390/cio/airq.c
  3. 2
      drivers/s390/cio/cio.c
  4. 25
      drivers/s390/cio/ioasm.h
  5. 24
      drivers/s390/cio/trace.c
  6. 363
      drivers/s390/cio/trace.h

5
drivers/s390/cio/Makefile
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@ -2,8 +2,11 @@
# Makefile for the S/390 common i/o drivers
#
# The following is required for define_trace.h to find ./trace.h
CFLAGS_trace.o := -I$(src)
obj-y += airq.o blacklist.o chsc.o cio.o css.o chp.o idset.o isc.o \
fcx.o itcw.o crw.o ccwreq.o
fcx.o itcw.o crw.o ccwreq.o trace.o
ccw_device-objs += device.o device_fsm.o device_ops.o
ccw_device-objs += device_id.o device_pgid.o device_status.o
obj-y += ccw_device.o cmf.o

1
drivers/s390/cio/airq.c
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@ -89,6 +89,7 @@ static irqreturn_t do_airq_interrupt(int irq, void *dummy)
set_cpu_flag(CIF_NOHZ_DELAY);
tpi_info = (struct tpi_info *) &get_irq_regs()->int_code;
trace_s390_cio_adapter_int(tpi_info);
head = &airq_lists[tpi_info->isc];
rcu_read_lock();
hlist_for_each_entry_rcu(airq, head, list)

2
drivers/s390/cio/cio.c
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@ -41,6 +41,7 @@
#include "blacklist.h"
#include "cio_debug.h"
#include "chp.h"
#include "trace.h"
debug_info_t *cio_debug_msg_id;
debug_info_t *cio_debug_trace_id;
@ -539,6 +540,7 @@ static irqreturn_t do_cio_interrupt(int irq, void *dummy)
set_cpu_flag(CIF_NOHZ_DELAY);
tpi_info = (struct tpi_info *) &get_irq_regs()->int_code;
trace_s390_cio_interrupt(tpi_info);
irb = this_cpu_ptr(&cio_irb);
sch = (struct subchannel *)(unsigned long) tpi_info->intparm;
if (!sch) {

25
drivers/s390/cio/ioasm.h
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@ -6,6 +6,7 @@
#include <asm/crw.h>
#include "orb.h"
#include "cio.h"
#include "trace.h"
/*
* Some S390 specific IO instructions as inline
@ -25,6 +26,8 @@ static inline int stsch(struct subchannel_id schid, struct schib *addr)
: "+d" (ccode), "=m" (*addr)
: "d" (reg1), "a" (addr)
: "cc");
trace_s390_cio_stsch(schid, addr, ccode);
return ccode;
}
@ -42,6 +45,8 @@ static inline int msch(struct subchannel_id schid, struct schib *addr)
: "+d" (ccode)
: "d" (reg1), "a" (addr), "m" (*addr)
: "cc");
trace_s390_cio_msch(schid, addr, ccode);
return ccode;
}
@ -57,6 +62,8 @@ static inline int tsch(struct subchannel_id schid, struct irb *addr)
: "=d" (ccode), "=m" (*addr)
: "d" (reg1), "a" (addr)
: "cc");
trace_s390_cio_tsch(schid, addr, ccode);
return ccode;
}
@ -74,6 +81,8 @@ static inline int ssch(struct subchannel_id schid, union orb *addr)
: "+d" (ccode)
: "d" (reg1), "a" (addr), "m" (*addr)
: "cc", "memory");
trace_s390_cio_ssch(schid, addr, ccode);
return ccode;
}
@ -89,6 +98,8 @@ static inline int csch(struct subchannel_id schid)
: "=d" (ccode)
: "d" (reg1)
: "cc");
trace_s390_cio_csch(schid, ccode);
return ccode;
}
@ -103,6 +114,8 @@ static inline int tpi(struct tpi_info *addr)
: "=d" (ccode), "=m" (*addr)
: "a" (addr)
: "cc");
trace_s390_cio_tpi(addr, ccode);
return ccode;
}
@ -118,6 +131,8 @@ static inline int chsc(void *chsc_area)
: "=d" (cc), "=m" (*(addr_type *) chsc_area)
: "d" (chsc_area), "m" (*(addr_type *) chsc_area)
: "cc");
trace_s390_cio_chsc(chsc_area, cc);
return cc;
}
@ -132,6 +147,8 @@ static inline int rchp(struct chp_id chpid)
" ipm %0\n"
" srl %0,28"
: "=d" (ccode) : "d" (reg1) : "cc");
trace_s390_cio_rchp(chpid, ccode);
return ccode;
}
@ -147,6 +164,8 @@ static inline int rsch(struct subchannel_id schid)
: "=d" (ccode)
: "d" (reg1)
: "cc", "memory");
trace_s390_cio_rsch(schid, ccode);
return ccode;
}
@ -162,6 +181,8 @@ static inline int hsch(struct subchannel_id schid)
: "=d" (ccode)
: "d" (reg1)
: "cc");
trace_s390_cio_hsch(schid, ccode);
return ccode;
}
@ -177,6 +198,8 @@ static inline int xsch(struct subchannel_id schid)
: "=d" (ccode)
: "d" (reg1)
: "cc");
trace_s390_cio_xsch(schid, ccode);
return ccode;
}
@ -191,6 +214,8 @@ static inline int stcrw(struct crw *crw)
: "=d" (ccode), "=m" (*crw)
: "a" (crw)
: "cc");
trace_s390_cio_stcrw(crw, ccode);
return ccode;
}

24
drivers/s390/cio/trace.c
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@ -0,0 +1,24 @@
/*
* Tracepoint definitions for s390_cio
*
* Copyright IBM Corp. 2015
* Author(s): Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
*/
#include <asm/crw.h>
#include "cio.h"
#define CREATE_TRACE_POINTS
#include "trace.h"
EXPORT_TRACEPOINT_SYMBOL(s390_cio_stsch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_msch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_tsch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_tpi);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_ssch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_csch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_hsch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_xsch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_rsch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_rchp);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_chsc);

363
drivers/s390/cio/trace.h
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@ -0,0 +1,363 @@
/*
* Tracepoint header for the s390 Common I/O layer (CIO)
*
* Copyright IBM Corp. 2015
* Author(s): Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
*/
#include <linux/kernel.h>
#include <asm/crw.h>
#include <uapi/asm/chpid.h>
#include <uapi/asm/schid.h>
#include "cio.h"
#include "orb.h"
#undef TRACE_SYSTEM
#define TRACE_SYSTEM s390
#if !defined(_TRACE_S390_CIO_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_S390_CIO_H
#include <linux/tracepoint.h>
DECLARE_EVENT_CLASS(s390_class_schib,
TP_PROTO(struct subchannel_id schid, struct schib *schib, int cc),
TP_ARGS(schid, schib, cc),
TP_STRUCT__entry(
__field(u8, cssid)
__field(u8, ssid)
__field(u16, schno)
__field(u16, devno)
__field_struct(struct schib, schib)
__field(int, cc)
),
TP_fast_assign(
__entry->cssid = schid.cssid;
__entry->ssid = schid.ssid;
__entry->schno = schid.sch_no;
__entry->devno = schib->pmcw.dev;
__entry->schib = *schib;
__entry->cc = cc;
),
TP_printk("schid=%x.%x.%04x cc=%d ena=%d st=%d dnv=%d dev=%04x "
"lpm=0x%02x pnom=0x%02x lpum=0x%02x pim=0x%02x pam=0x%02x "
"pom=0x%02x chpids=%016llx",
__entry->cssid, __entry->ssid, __entry->schno, __entry->cc,
__entry->schib.pmcw.ena, __entry->schib.pmcw.st,
__entry->schib.pmcw.dnv, __entry->schib.pmcw.dev,
__entry->schib.pmcw.lpm, __entry->schib.pmcw.pnom,
__entry->schib.pmcw.lpum, __entry->schib.pmcw.pim,
__entry->schib.pmcw.pam, __entry->schib.pmcw.pom,
*((u64 *) __entry->schib.pmcw.chpid)
)
);
/**
* s390_cio_stsch - Store Subchannel instruction (STSCH) was performed
* @schid: Subchannel ID
* @schib: Subchannel-Information block
* @cc: Condition code
*/
DEFINE_EVENT(s390_class_schib, s390_cio_stsch,
TP_PROTO(struct subchannel_id schid, struct schib *schib, int cc),
TP_ARGS(schid, schib, cc)
);
/**
* s390_cio_msch - Modify Subchannel instruction (MSCH) was performed
* @schid: Subchannel ID
* @schib: Subchannel-Information block
* @cc: Condition code
*/
DEFINE_EVENT(s390_class_schib, s390_cio_msch,
TP_PROTO(struct subchannel_id schid, struct schib *schib, int cc),
TP_ARGS(schid, schib, cc)
);
/**
* s390_cio_tsch - Test Subchannel instruction (TSCH) was performed
* @schid: Subchannel ID
* @irb: Interruption-Response Block
* @cc: Condition code
*/
TRACE_EVENT(s390_cio_tsch,
TP_PROTO(struct subchannel_id schid, struct irb *irb, int cc),
TP_ARGS(schid, irb, cc),
TP_STRUCT__entry(
__field(u8, cssid)
__field(u8, ssid)
__field(u16, schno)
__field_struct(struct irb, irb)
__field(int, cc)
),
TP_fast_assign(
__entry->cssid = schid.cssid;
__entry->ssid = schid.ssid;
__entry->schno = schid.sch_no;
__entry->irb = *irb;
__entry->cc = cc;
),
TP_printk("schid=%x.%x.%04x cc=%d dcc=%d pno=%d fctl=0x%x actl=0x%x "
"stctl=0x%x dstat=0x%x cstat=0x%x",
__entry->cssid, __entry->ssid, __entry->schno, __entry->cc,
scsw_cc(&__entry->irb.scsw), scsw_pno(&__entry->irb.scsw),
scsw_fctl(&__entry->irb.scsw), scsw_actl(&__entry->irb.scsw),
scsw_stctl(&__entry->irb.scsw),
scsw_dstat(&__entry->irb.scsw), scsw_cstat(&__entry->irb.scsw)
)
);
/**
* s390_cio_tpi - Test Pending Interruption instruction (TPI) was performed
* @addr: Address of the I/O interruption code or %NULL
* @cc: Condition code
*/
TRACE_EVENT(s390_cio_tpi,
TP_PROTO(struct tpi_info *addr, int cc),
TP_ARGS(addr, cc),
TP_STRUCT__entry(
__field(int, cc)
__field_struct(struct tpi_info, tpi_info)
__field(u8, cssid)
__field(u8, ssid)
__field(u16, schno)
),
TP_fast_assign(
__entry->cc = cc;
if (cc != 0)
memset(&__entry->tpi_info, 0, sizeof(struct tpi_info));
else if (addr)
__entry->tpi_info = *addr;
else {
memcpy(&__entry->tpi_info, &S390_lowcore.subchannel_id,
sizeof(struct tpi_info));
}
__entry->cssid = __entry->tpi_info.schid.cssid;
__entry->ssid = __entry->tpi_info.schid.ssid;
__entry->schno = __entry->tpi_info.schid.sch_no;
),
TP_printk("schid=%x.%x.%04x cc=%d a=%d isc=%d type=%d",
__entry->cssid, __entry->ssid, __entry->schno, __entry->cc,
__entry->tpi_info.adapter_IO, __entry->tpi_info.isc,
__entry->tpi_info.type
)
);
/**
* s390_cio_ssch - Start Subchannel instruction (SSCH) was performed
* @schid: Subchannel ID
* @orb: Operation-Request Block
* @cc: Condition code
*/
TRACE_EVENT(s390_cio_ssch,
TP_PROTO(struct subchannel_id schid, union orb *orb, int cc),
TP_ARGS(schid, orb, cc),
TP_STRUCT__entry(
__field(u8, cssid)
__field(u8, ssid)
__field(u16, schno)
__field_struct(union orb, orb)
__field(int, cc)
),
TP_fast_assign(
__entry->cssid = schid.cssid;
__entry->ssid = schid.ssid;
__entry->schno = schid.sch_no;
__entry->orb = *orb;
__entry->cc = cc;
),
TP_printk("schid=%x.%x.%04x cc=%d", __entry->cssid, __entry->ssid,
__entry->schno, __entry->cc
)
);
DECLARE_EVENT_CLASS(s390_class_schid,
TP_PROTO(struct subchannel_id schid, int cc),
TP_ARGS(schid, cc),
TP_STRUCT__entry(
__field(u8, cssid)
__field(u8, ssid)
__field(u16, schno)
__field(int, cc)
),
TP_fast_assign(
__entry->cssid = schid.cssid;
__entry->ssid = schid.ssid;
__entry->schno = schid.sch_no;
__entry->cc = cc;
),
TP_printk("schid=%x.%x.%04x cc=%d", __entry->cssid, __entry->ssid,
__entry->schno, __entry->cc
)
);
/**
* s390_cio_csch - Clear Subchannel instruction (CSCH) was performed
* @schid: Subchannel ID
* @cc: Condition code
*/
DEFINE_EVENT(s390_class_schid, s390_cio_csch,
TP_PROTO(struct subchannel_id schid, int cc),
TP_ARGS(schid, cc)
);
/**
* s390_cio_hsch - Halt Subchannel instruction (HSCH) was performed
* @schid: Subchannel ID
* @cc: Condition code
*/
DEFINE_EVENT(s390_class_schid, s390_cio_hsch,
TP_PROTO(struct subchannel_id schid, int cc),
TP_ARGS(schid, cc)
);
/**
* s390_cio_xsch - Cancel Subchannel instruction (XSCH) was performed
* @schid: Subchannel ID
* @cc: Condition code
*/
DEFINE_EVENT(s390_class_schid, s390_cio_xsch,
TP_PROTO(struct subchannel_id schid, int cc),
TP_ARGS(schid, cc)
);
/**
* s390_cio_rsch - Resume Subchannel instruction (RSCH) was performed
* @schid: Subchannel ID
* @cc: Condition code
*/
DEFINE_EVENT(s390_class_schid, s390_cio_rsch,
TP_PROTO(struct subchannel_id schid, int cc),
TP_ARGS(schid, cc)
);
/**
* s390_cio_rchp - Reset Channel Path (RCHP) instruction was performed
* @chpid: Channel-Path Identifier
* @cc: Condition code
*/
TRACE_EVENT(s390_cio_rchp,
TP_PROTO(struct chp_id chpid, int cc),
TP_ARGS(chpid, cc),
TP_STRUCT__entry(
__field(u8, cssid)
__field(u8, id)
__field(int, cc)
),
TP_fast_assign(
__entry->cssid = chpid.cssid;
__entry->id = chpid.id;
__entry->cc = cc;
),
TP_printk("chpid=%x.%02x cc=%d", __entry->cssid, __entry->id,
__entry->cc
)
);
#define CHSC_MAX_REQUEST_LEN 64
#define CHSC_MAX_RESPONSE_LEN 64
/**
* s390_cio_chsc - Channel Subsystem Call (CHSC) instruction was performed
* @chsc: CHSC block
* @cc: Condition code
*/
TRACE_EVENT(s390_cio_chsc,
TP_PROTO(struct chsc_header *chsc, int cc),
TP_ARGS(chsc, cc),
TP_STRUCT__entry(
__field(int, cc)
__field(u16, code)
__field(u16, rcode)
__array(u8, request, CHSC_MAX_REQUEST_LEN)
__array(u8, response, CHSC_MAX_RESPONSE_LEN)
),
TP_fast_assign(
__entry->cc = cc;
__entry->code = chsc->code;
memcpy(&entry->request, chsc,
min_t(u16, chsc->length, CHSC_MAX_REQUEST_LEN));
chsc = (struct chsc_header *) ((char *) chsc + chsc->length);
__entry->rcode = chsc->code;
memcpy(&entry->response, chsc,
min_t(u16, chsc->length, CHSC_MAX_RESPONSE_LEN));
),
TP_printk("code=0x%04x cc=%d rcode=0x%04x", __entry->code,
__entry->cc, __entry->rcode)
);
/**
* s390_cio_interrupt - An I/O interrupt occurred
* @tpi_info: Address of the I/O interruption code
*/
TRACE_EVENT(s390_cio_interrupt,
TP_PROTO(struct tpi_info *tpi_info),
TP_ARGS(tpi_info),
TP_STRUCT__entry(
__field_struct(struct tpi_info, tpi_info)
__field(u8, cssid)
__field(u8, ssid)
__field(u16, schno)
),
TP_fast_assign(
__entry->tpi_info = *tpi_info;
__entry->cssid = __entry->tpi_info.schid.cssid;
__entry->ssid = __entry->tpi_info.schid.ssid;
__entry->schno = __entry->tpi_info.schid.sch_no;
),
TP_printk("schid=%x.%x.%04x isc=%d type=%d",
__entry->cssid, __entry->ssid, __entry->schno,
__entry->tpi_info.isc, __entry->tpi_info.type
)
);
/**
* s390_cio_adapter_int - An adapter interrupt occurred
* @tpi_info: Address of the I/O interruption code
*/
TRACE_EVENT(s390_cio_adapter_int,
TP_PROTO(struct tpi_info *tpi_info),
TP_ARGS(tpi_info),
TP_STRUCT__entry(
__field_struct(struct tpi_info, tpi_info)
),
TP_fast_assign(
__entry->tpi_info = *tpi_info;
),
TP_printk("isc=%d", __entry->tpi_info.isc)
);
/**
* s390_cio_stcrw - Store Channel Report Word (STCRW) was performed
* @crw: Channel Report Word
* @cc: Condition code
*/
TRACE_EVENT(s390_cio_stcrw,
TP_PROTO(struct crw *crw, int cc),
TP_ARGS(crw, cc),
TP_STRUCT__entry(
__field_struct(struct crw, crw)
__field(int, cc)
),
TP_fast_assign(
__entry->crw = *crw;
__entry->cc = cc;
),
TP_printk("cc=%d slct=%d oflw=%d chn=%d rsc=%d anc=%d erc=0x%x "
"rsid=0x%x",
__entry->cc, __entry->crw.slct, __entry->crw.oflw,
__entry->crw.chn, __entry->crw.rsc, __entry->crw.anc,
__entry->crw.erc, __entry->crw.rsid
)
);
#endif /* _TRACE_S390_CIO_H */
/* This part must be outside protection */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE trace
#include <trace/define_trace.h>
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