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// SPDX-License-Identifier: GPL-2.0
/*
* Channel subsystem I/O instructions.
*/
#include <linux/export.h>
#include <asm/asm-extable.h>
#include <asm/chpid.h>
#include <asm/schid.h>
#include <asm/asm.h>
#include <asm/crw.h>
#include "ioasm.h"
#include "orb.h"
#include "cio.h"
#include "cio_inject.h"
static inline int __stsch(struct subchannel_id schid, struct schib *addr)
{
unsigned long r1 = *(unsigned int *)&schid;
int ccode, exception;
exception = 1;
asm volatile(
" lgr 1,%[r1]\n"
" stsch %[addr]\n"
"0: lhi %[exc],0\n"
"1:\n"
CC_IPM(cc)
EX_TABLE(0b, 1b)
: CC_OUT(cc, ccode), [addr] "=Q" (*addr), [exc] "+d" (exception)
: [r1] "d" (r1)
: CC_CLOBBER_LIST("1"));
return exception ? -EIO : CC_TRANSFORM(ccode);
}
int stsch(struct subchannel_id schid, struct schib *addr)
{
int ccode;
ccode = __stsch(schid, addr);
trace_s390_cio_stsch(schid, addr, ccode);
return ccode;
}
EXPORT_SYMBOL(stsch);
static inline int __msch(struct subchannel_id schid, struct schib *addr)
{
unsigned long r1 = *(unsigned int *)&schid;
int ccode, exception;
exception = 1;
asm volatile(
" lgr 1,%[r1]\n"
" msch %[addr]\n"
"0: lhi %[exc],0\n"
"1:\n"
CC_IPM(cc)
EX_TABLE(0b, 1b)
: CC_OUT(cc, ccode), [exc] "+d" (exception)
: [r1] "d" (r1), [addr] "Q" (*addr)
: CC_CLOBBER_LIST("1"));
return exception ? -EIO : CC_TRANSFORM(ccode);
}
int msch(struct subchannel_id schid, struct schib *addr)
{
int ccode;
ccode = __msch(schid, addr);
trace_s390_cio_msch(schid, addr, ccode);
return ccode;
}
static inline int __tsch(struct subchannel_id schid, struct irb *addr)
{
unsigned long r1 = *(unsigned int *)&schid;
int ccode;
asm volatile(
" lgr 1,%[r1]\n"
" tsch %[addr]\n"
CC_IPM(cc)
: CC_OUT(cc, ccode), [addr] "=Q" (*addr)
: [r1] "d" (r1)
: CC_CLOBBER_LIST("1"));
return CC_TRANSFORM(ccode);
}
int tsch(struct subchannel_id schid, struct irb *addr)
{
int ccode;
ccode = __tsch(schid, addr);
trace_s390_cio_tsch(schid, addr, ccode);
return ccode;
}
static inline int __ssch(struct subchannel_id schid, union orb *addr)
{
unsigned long r1 = *(unsigned int *)&schid;
int ccode, exception;
exception = 1;
asm volatile(
" lgr 1,%[r1]\n"
" ssch %[addr]\n"
"0: lhi %[exc],0\n"
"1:\n"
CC_IPM(cc)
EX_TABLE(0b, 1b)
: CC_OUT(cc, ccode), [exc] "+d" (exception)
: [r1] "d" (r1), [addr] "Q" (*addr)
: CC_CLOBBER_LIST("memory", "1"));
return CC_TRANSFORM(ccode);
}
int ssch(struct subchannel_id schid, union orb *addr)
{
int ccode;
ccode = __ssch(schid, addr);
trace_s390_cio_ssch(schid, addr, ccode);
return ccode;
}
EXPORT_SYMBOL(ssch);
static inline int __csch(struct subchannel_id schid)
{
unsigned long r1 = *(unsigned int *)&schid;
int ccode;
asm volatile(
" lgr 1,%[r1]\n"
" csch\n"
CC_IPM(cc)
: CC_OUT(cc, ccode)
: [r1] "d" (r1)
: CC_CLOBBER_LIST("1"));
return CC_TRANSFORM(ccode);
}
int csch(struct subchannel_id schid)
{
int ccode;
ccode = __csch(schid);
trace_s390_cio_csch(schid, ccode);
return ccode;
}
EXPORT_SYMBOL(csch);
int tpi(struct tpi_info *addr)
{
int ccode;
asm volatile(
" tpi %[addr]\n"
CC_IPM(cc)
: CC_OUT(cc, ccode), [addr] "=Q" (*addr)
:
: CC_CLOBBER);
ccode = CC_TRANSFORM(ccode);
trace_s390_cio_tpi(addr, ccode);
return ccode;
}
int chsc(void *chsc_area)
{
typedef struct { char _[4096]; } addr_type;
int cc, exception;
exception = 1;
asm volatile(
" .insn rre,0xb25f0000,%[chsc_area],0\n"
"0: lhi %[exc],0\n"
"1:\n"
CC_IPM(cc)
EX_TABLE(0b, 1b)
: CC_OUT(cc, cc), "+m" (*(addr_type *)chsc_area), [exc] "+d" (exception)
: [chsc_area] "d" (chsc_area)
: CC_CLOBBER);
cc = exception ? -EIO : CC_TRANSFORM(cc);
trace_s390_cio_chsc(chsc_area, cc);
return cc;
}
EXPORT_SYMBOL(chsc);
static inline int __rsch(struct subchannel_id schid)
{
unsigned long r1 = *(unsigned int *)&schid;
int ccode;
asm volatile(
" lgr 1,%[r1]\n"
" rsch\n"
CC_IPM(cc)
: CC_OUT(cc, ccode)
: [r1] "d" (r1)
: CC_CLOBBER_LIST("memory", "1"));
return CC_TRANSFORM(ccode);
}
int rsch(struct subchannel_id schid)
{
int ccode;
ccode = __rsch(schid);
trace_s390_cio_rsch(schid, ccode);
return ccode;
}
static inline int __hsch(struct subchannel_id schid)
{
unsigned long r1 = *(unsigned int *)&schid;
int ccode;
asm volatile(
" lgr 1,%[r1]\n"
" hsch\n"
CC_IPM(cc)
: CC_OUT(cc, ccode)
: [r1] "d" (r1)
: CC_CLOBBER_LIST("1"));
return CC_TRANSFORM(ccode);
}
int hsch(struct subchannel_id schid)
{
int ccode;
ccode = __hsch(schid);
trace_s390_cio_hsch(schid, ccode);
return ccode;
}
EXPORT_SYMBOL(hsch);
static inline int __xsch(struct subchannel_id schid)
{
unsigned long r1 = *(unsigned int *)&schid;
int ccode;
asm volatile(
" lgr 1,%[r1]\n"
" xsch\n"
" ipm %[cc]\n"
" srl %[cc],28\n"
: [cc] "=&d" (ccode)
: [r1] "d" (r1)
: "cc", "1");
return CC_TRANSFORM(ccode);
}
int xsch(struct subchannel_id schid)
{
int ccode;
ccode = __xsch(schid);
trace_s390_cio_xsch(schid, ccode);
return ccode;
}
static inline int __stcrw(struct crw *crw)
{
int ccode;
asm volatile(
" stcrw %[crw]\n"
CC_IPM(cc)
: CC_OUT(cc, ccode), [crw] "=Q" (*crw)
:
: CC_CLOBBER);
return CC_TRANSFORM(ccode);
}
static inline int _stcrw(struct crw *crw)
{
#ifdef CONFIG_CIO_INJECT
if (static_branch_unlikely(&cio_inject_enabled)) {
if (stcrw_get_injected(crw) == 0)
return 0;
}
#endif
return __stcrw(crw);
}
int stcrw(struct crw *crw)
{
int ccode;
ccode = _stcrw(crw);
trace_s390_cio_stcrw(crw, ccode);
return ccode;
}
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