/**
* cio_enable_subchannel - enable a subchannel.
* @sch: subchannel to be enabled
* @intparm: interruption parameter to set
*/
int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
{
int ret;
CIO_TRACE_EVENT(2, "ensch");
CIO_TRACE_EVENT(2, dev_name(&sch->dev));
if (sch_is_pseudo_sch(sch))
return -EINVAL;
if (cio_update_schib(sch))
return -ENODEV;
sch->config.ena = 1;
sch->config.isc = sch->isc;
sch->config.intparm = intparm;
ret = cio_commit_config(sch);
if (ret == -EIO) {
/*
* Got a program check in msch. Try without
* the concurrent sense bit the next time.
*/
sch->config.csense = 0;
ret = cio_commit_config(sch);
}
CIO_HEX_EVENT(2, &ret, sizeof(ret));
return ret;
}
/**
* cio_disable_subchannel - disable a subchannel.
* @sch: subchannel to disable
*/
int cio_disable_subchannel(struct subchannel *sch)
{
int retry;
int ret;
CIO_TRACE_EVENT(2, "dissch");
CIO_TRACE_EVENT(2, dev_name(&sch->dev));
if (sch_is_pseudo_sch(sch))
return 0;
if (cio_update_schib(sch))
return -ENODEV;
sch->config.ena = 0;
for (retry = 0; retry < 3; retry++) {
ret = cio_commit_config(sch);
if (ret == -EBUSY) {
struct irb irb;
if (tsch(sch->schid, &irb) != 0)
break;
} else
break;
}
CIO_HEX_EVENT(2, &ret, sizeof(ret));
return ret;
}
int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
{
int retry;
int ret;
CIO_TRACE_EVENT(2, "ensch");
CIO_TRACE_EVENT(2, dev_name(&sch->dev));
if (sch_is_pseudo_sch(sch))
return -EINVAL;
if (cio_update_schib(sch))
return -ENODEV;
sch->config.ena = 1;
sch->config.isc = sch->isc;
sch->config.intparm = intparm;
for (retry = 0; retry < 3; retry++) {
ret = cio_commit_config(sch);
if (ret == -EIO) {
sch->config.csense = 0;
} else if (ret == -EBUSY) {
struct irb irb;
if (tsch(sch->schid, &irb) != 0)
break;
} else
break;
}
CIO_HEX_EVENT(2, &ret, sizeof(ret));
return ret;
}
/**
* cio_disable_subchannel - disable a subchannel.
* @sch: subchannel to disable
*/
int cio_disable_subchannel(struct subchannel *sch)
{
char dbf_txt[15];
int ccode;
int retry;
int ret;
CIO_TRACE_EVENT (2, "dissch");
CIO_TRACE_EVENT(2, dev_name(&sch->dev));
if (sch_is_pseudo_sch(sch))
return 0;
ccode = stsch (sch->schid, &sch->schib);
if (ccode == 3) /* Not operational. */
return -ENODEV;
if (scsw_actl(&sch->schib.scsw) != 0)
/*
* the disable function must not be called while there are
* requests pending for completion !
*/
return -EBUSY;
for (retry = 5, ret = 0; retry > 0; retry--) {
sch->schib.pmcw.ena = 0;
ret = cio_modify(sch);
if (ret == -ENODEV)
break;
if (ret == -EBUSY)
/*
* The subchannel is busy or status pending.
* We'll disable when the next interrupt was delivered
* via the state machine.
*/
break;
if (ret == 0) {
stsch (sch->schid, &sch->schib);
if (!sch->schib.pmcw.ena)
break;
}
}
sprintf (dbf_txt, "ret:%d", ret);
CIO_TRACE_EVENT (2, dbf_txt);
return ret;
}
/**
* cio_disable_subchannel - disable a subchannel.
* @sch: subchannel to disable
*/
int cio_disable_subchannel(struct subchannel *sch)
{
int ret;
CIO_TRACE_EVENT(2, "dissch");
CIO_TRACE_EVENT(2, dev_name(&sch->dev));
if (sch_is_pseudo_sch(sch))
return 0;
if (cio_update_schib(sch))
return -ENODEV;
sch->config.ena = 0;
ret = cio_commit_config(sch);
CIO_HEX_EVENT(2, &ret, sizeof(ret));
return ret;
}
/**
* cio_enable_subchannel - enable a subchannel.
* @sch: subchannel to be enabled
* @intparm: interruption parameter to set
*/
int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
{
char dbf_txt[15];
int ccode;
int retry;
int ret;
CIO_TRACE_EVENT (2, "ensch");
CIO_TRACE_EVENT(2, dev_name(&sch->dev));
if (sch_is_pseudo_sch(sch))
return -EINVAL;
ccode = stsch (sch->schid, &sch->schib);
if (ccode)
return -ENODEV;
for (retry = 5, ret = 0; retry > 0; retry--) {
sch->schib.pmcw.ena = 1;
sch->schib.pmcw.isc = sch->isc;
sch->schib.pmcw.intparm = intparm;
ret = cio_modify(sch);
if (ret == -ENODEV)
break;
if (ret == -EIO)
/*
* Got a program check in cio_modify. Try without
* the concurrent sense bit the next time.
*/
sch->schib.pmcw.csense = 0;
if (ret == 0) {
stsch (sch->schid, &sch->schib);
if (sch->schib.pmcw.ena)
break;
}
if (ret == -EBUSY) {
struct irb irb;
if (tsch(sch->schid, &irb) != 0)
break;
}
}
sprintf (dbf_txt, "ret:%d", ret);
CIO_TRACE_EVENT (2, dbf_txt);
return ret;
}
/**
* cio_enable_subchannel - enable a subchannel.
* @sch: subchannel to be enabled
* @intparm: interruption parameter to set
*/
int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
{
char dbf_txt[15];
int retry;
int ret;
CIO_TRACE_EVENT (2, "ensch");
CIO_TRACE_EVENT(2, dev_name(&sch->dev));
if (sch_is_pseudo_sch(sch))
return -EINVAL;
if (cio_update_schib(sch))
return -ENODEV;
sch->config.ena = 1;
sch->config.isc = sch->isc;
sch->config.intparm = intparm;
for (retry = 0; retry < 3; retry++) {
ret = cio_commit_config(sch);
if (ret == -EIO) {
/*
* Got a program check in msch. Try without
* the concurrent sense bit the next time.
*/
sch->config.csense = 0;
} else if (ret == -EBUSY) {
struct irb irb;
if (tsch(sch->schid, &irb) != 0)
break;
} else
break;
}
sprintf (dbf_txt, "ret:%d", ret);
CIO_TRACE_EVENT (2, dbf_txt);
return ret;
}