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Commit 15cba26f authored by Ralph Campbell's avatar Ralph Campbell Committed by Roland Dreier
Browse files

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



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: default avatarRalph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 6cff2faa

drivers/infiniband/hw/ipath/ipath_sysfs.c

+39 −1
Original line number Diff line number Diff line
@@ -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,