Commit b279a4f5 authored by Cornelia Huck's avatar Cornelia Huck Committed by Martin Schwidefsky
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[S390] cio: I/O subchannel specific fields.



Some fields may be !0 only for I/O subchannels. Add some checks
where required. Also adapt cio_enable_subchannel() to make the
caller specify the intparm, which makes it more generic.
Signed-off-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 4e8e56c6
......@@ -89,7 +89,8 @@ int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
/* Copy data */
ret = 0;
memset(ssd, 0, sizeof(struct chsc_ssd_info));
if ((ssd_area->st != 0) && (ssd_area->st != 2))
if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
(ssd_area->st != SUBCHANNEL_TYPE_MSG))
goto out_free;
ssd->path_mask = ssd_area->path_mask;
ssd->fla_valid_mask = ssd_area->fla_valid_mask;
......@@ -158,7 +159,7 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
spin_lock_irq(sch->lock);
stsch(sch->schid, &schib);
if (!schib.pmcw.dnv)
if (!css_sch_is_valid(&schib))
goto out_unreg;
memcpy(&sch->schib, &schib, sizeof(struct schib));
/* Check for single path devices. */
......
......@@ -406,8 +406,8 @@ cio_modify (struct subchannel *sch)
/*
* Enable subchannel.
*/
int
cio_enable_subchannel (struct subchannel *sch, unsigned int isc)
int cio_enable_subchannel(struct subchannel *sch, unsigned int isc,
u32 intparm)
{
char dbf_txt[15];
int ccode;
......@@ -426,7 +426,7 @@ cio_enable_subchannel (struct subchannel *sch, unsigned int isc)
for (retry = 5, ret = 0; retry > 0; retry--) {
sch->schib.pmcw.ena = 1;
sch->schib.pmcw.isc = isc;
sch->schib.pmcw.intparm = (u32)(addr_t)sch;
sch->schib.pmcw.intparm = intparm;
ret = cio_modify(sch);
if (ret == -ENODEV)
break;
......@@ -577,11 +577,8 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
}
/* Initialization for io subchannels. */
if (!sch->schib.pmcw.dnv) {
/* io subchannel but device number is invalid. */
err = -ENODEV;
goto out;
}
if (!css_sch_is_valid(&sch->schib))
return -ENODEV;
/* Devno is valid. */
if (is_blacklisted (sch->schid.ssid, sch->schib.pmcw.dev)) {
/*
......@@ -745,9 +742,9 @@ cio_test_for_console(struct subchannel_id schid, void *data)
{
if (stsch_err(schid, &console_subchannel.schib) != 0)
return -ENXIO;
if (console_subchannel.schib.pmcw.dnv &&
console_subchannel.schib.pmcw.dev ==
console_devno) {
if ((console_subchannel.schib.pmcw.st == SUBCHANNEL_TYPE_IO) &&
console_subchannel.schib.pmcw.dnv &&
(console_subchannel.schib.pmcw.dev == console_devno)) {
console_irq = schid.sch_no;
return 1; /* found */
}
......@@ -765,6 +762,7 @@ cio_get_console_sch_no(void)
/* VM provided us with the irq number of the console. */
schid.sch_no = console_irq;
if (stsch(schid, &console_subchannel.schib) != 0 ||
(console_subchannel.schib.pmcw.st != SUBCHANNEL_TYPE_IO) ||
!console_subchannel.schib.pmcw.dnv)
return -1;
console_devno = console_subchannel.schib.pmcw.dev;
......@@ -1029,7 +1027,7 @@ static int __reipl_subchannel_match(struct subchannel_id schid, void *data)
if (stsch_reset(schid, &schib))
return -ENXIO;
if (schib.pmcw.dnv &&
if ((schib.pmcw.st == SUBCHANNEL_TYPE_IO) && schib.pmcw.dnv &&
(schib.pmcw.dev == match_id->devid.devno) &&
(schid.ssid == match_id->devid.ssid)) {
match_id->schid = schid;
......@@ -1075,6 +1073,8 @@ int __init cio_get_iplinfo(struct cio_iplinfo *iplinfo)
return -ENODEV;
if (stsch(schid, &schib))
return -ENODEV;
if (schib.pmcw.st != SUBCHANNEL_TYPE_IO)
return -ENODEV;
if (!schib.pmcw.dnv)
return -ENODEV;
iplinfo->devno = schib.pmcw.dev;
......
......@@ -60,7 +60,7 @@ struct subchannel {
enum {
SUBCHANNEL_TYPE_IO = 0,
SUBCHANNEL_TYPE_CHSC = 1,
SUBCHANNEL_TYPE_MESSAGE = 2,
SUBCHANNEL_TYPE_MSG = 2,
SUBCHANNEL_TYPE_ADM = 3,
} st; /* subchannel type */
......@@ -85,7 +85,7 @@ struct subchannel {
#define to_subchannel(n) container_of(n, struct subchannel, dev)
extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
extern int cio_enable_subchannel (struct subchannel *, unsigned int);
extern int cio_enable_subchannel(struct subchannel *, unsigned int, u32);
extern int cio_disable_subchannel (struct subchannel *);
extern int cio_cancel (struct subchannel *);
extern int cio_clear (struct subchannel *);
......
......@@ -237,11 +237,25 @@ get_subchannel_by_schid(struct subchannel_id schid)
return dev ? to_subchannel(dev) : NULL;
}
/**
* css_sch_is_valid() - check if a subchannel is valid
* @schib: subchannel information block for the subchannel
*/
int css_sch_is_valid(struct schib *schib)
{
if ((schib->pmcw.st == SUBCHANNEL_TYPE_IO) && !schib->pmcw.dnv)
return 0;
return 1;
}
EXPORT_SYMBOL_GPL(css_sch_is_valid);
static int css_get_subchannel_status(struct subchannel *sch)
{
struct schib schib;
if (stsch(sch->schid, &schib) || !schib.pmcw.dnv)
if (stsch(sch->schid, &schib))
return CIO_GONE;
if (!css_sch_is_valid(&schib))
return CIO_GONE;
if (sch->schib.pmcw.dnv && (schib.pmcw.dev != sch->schib.pmcw.dev))
return CIO_REVALIDATE;
......@@ -349,7 +363,7 @@ static int css_evaluate_new_subchannel(struct subchannel_id schid, int slow)
/* Will be done on the slow path. */
return -EAGAIN;
}
if (stsch_err(schid, &schib) || !schib.pmcw.dnv) {
if (stsch_err(schid, &schib) || !css_sch_is_valid(&schib)) {
/* Unusable - ignore. */
return 0;
}
......
......@@ -136,6 +136,8 @@ void css_schedule_eval(struct subchannel_id schid);
void css_schedule_eval_all(void);
int sch_is_pseudo_sch(struct subchannel *);
struct schib;
int css_sch_is_valid(struct schib *);
extern struct workqueue_struct *slow_path_wq;
......
......@@ -553,7 +553,8 @@ ccw_device_recognition(struct ccw_device *cdev)
(cdev->private->state != DEV_STATE_BOXED))
return -EINVAL;
sch = to_subchannel(cdev->dev.parent);
ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc);
ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc,
(u32)(addr_t)sch);
if (ret != 0)
/* Couldn't enable the subchannel for i/o. Sick device. */
return ret;
......@@ -663,7 +664,8 @@ ccw_device_online(struct ccw_device *cdev)
sch = to_subchannel(cdev->dev.parent);
if (css_init_done && !get_device(&cdev->dev))
return -ENODEV;
ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc);
ret = cio_enable_subchannel(sch, sch->schib.pmcw.isc,
(u32)(addr_t)sch);
if (ret != 0) {
/* Couldn't enable the subchannel for i/o. Sick device. */
if (ret == -ENODEV)
......@@ -1043,7 +1045,8 @@ ccw_device_start_id(struct ccw_device *cdev, enum dev_event dev_event)
struct subchannel *sch;
sch = to_subchannel(cdev->dev.parent);
if (cio_enable_subchannel(sch, sch->schib.pmcw.isc) != 0)
if (cio_enable_subchannel(sch, sch->schib.pmcw.isc,
(u32)(addr_t)sch) != 0)
/* Couldn't enable the subchannel for i/o. Sick device. */
return;
......
......@@ -501,7 +501,7 @@ ccw_device_stlck(struct ccw_device *cdev)
return -ENOMEM;
}
spin_lock_irqsave(sch->lock, flags);
ret = cio_enable_subchannel(sch, 3);
ret = cio_enable_subchannel(sch, 3, (u32)(addr_t)sch);
if (ret)
goto out_unlock;
/*
......
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