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IB/ipath: Add ability to set the LMC via the sysfs debugging interface

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This patch adds the ability to set the LMC via a sysfs file as if the SM
sent a SubnSet(PortInfo) MAD.  It is useful for debugging when no SM is
running.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Ralph Campbell 2007-09-12 15:00:58 -07:00 committed by Roland Dreier
parent 6cff2faaf1
commit 15cba26f42
1 changed files with 39 additions and 1 deletions
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40
drivers/infiniband/hw/ipath/ipath_sysfs.c
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@ -163,6 +163,42 @@ static ssize_t show_boardversion(struct device *dev,
return scnprintf(buf, PAGE_SIZE, "%s", dd->ipath_boardversion);
}
static ssize_t show_lmc(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ipath_devdata *dd = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%u\n", dd->ipath_lmc);
}
static ssize_t store_lmc(struct device *dev,
struct device_attribute *attr,
const char *buf,
size_t count)
{
struct ipath_devdata *dd = dev_get_drvdata(dev);
u16 lmc = 0;
int ret;
ret = ipath_parse_ushort(buf, &lmc);
if (ret < 0)
goto invalid;
if (lmc > 7) {
ret = -EINVAL;
goto invalid;
}
ipath_set_lid(dd, dd->ipath_lid, lmc);
goto bail;
invalid:
ipath_dev_err(dd, "attempt to set invalid LMC %u\n", lmc);
bail:
return ret;
}
static ssize_t show_lid(struct device *dev,
struct device_attribute *attr,
char *buf)
@ -190,7 +226,7 @@ static ssize_t store_lid(struct device *dev,
goto invalid;
}
ipath_set_lid(dd, lid, 0);
ipath_set_lid(dd, lid, dd->ipath_lmc);
goto bail;
invalid:
@ -648,6 +684,7 @@ static struct attribute_group driver_attr_group = {
};
static DEVICE_ATTR(guid, S_IWUSR | S_IRUGO, show_guid, store_guid);
static DEVICE_ATTR(lmc, S_IWUSR | S_IRUGO, show_lmc, store_lmc);
static DEVICE_ATTR(lid, S_IWUSR | S_IRUGO, show_lid, store_lid);
static DEVICE_ATTR(link_state, S_IWUSR, NULL, store_link_state);
static DEVICE_ATTR(mlid, S_IWUSR | S_IRUGO, show_mlid, store_mlid);
@ -667,6 +704,7 @@ static DEVICE_ATTR(logged_errors, S_IRUGO, show_logged_errs, NULL);
static struct attribute *dev_attributes[] = {
&dev_attr_guid.attr,
&dev_attr_lmc.attr,
&dev_attr_lid.attr,
&dev_attr_link_state.attr,
&dev_attr_mlid.attr,