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authorRam Vepa <ram.vepa@qlogic.com>2011-05-31 20:20:43 +0000
committerRoland Dreier <roland@purestorage.com>2011-07-18 12:09:19 -0700
commit2df4f7579d212e8e0df7c8a24f57bf90f23fd516 (patch)
tree84c5a496f67f22f38a7c926fe3188f6bcbb3ac30 /drivers/infiniband/hw
parentac0cae4495303b8fffd3df9c7cb29c7d0c05f210 (diff)
IB/qib: Add sysfs interface to read free contexts
Indicate the number of free user contexts via the sysfs file /sys/class/infiniband/qib0/nfreectxts as required for PSM. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw')
-rw-r--r--drivers/infiniband/hw/qib/qib_sysfs.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/qib/qib_sysfs.c b/drivers/infiniband/hw/qib/qib_sysfs.c
index d50a33fe8bbc..14d129de4320 100644
--- a/drivers/infiniband/hw/qib/qib_sysfs.c
+++ b/drivers/infiniband/hw/qib/qib_sysfs.c
@@ -507,6 +507,18 @@ static ssize_t show_nctxts(struct device *device,
dd->first_user_ctxt);
}
+static ssize_t show_nfreectxts(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct qib_ibdev *dev =
+ container_of(device, struct qib_ibdev, ibdev.dev);
+ struct qib_devdata *dd = dd_from_dev(dev);
+
+ /* Return the number of free user ports (contexts) available. */
+ return scnprintf(buf, PAGE_SIZE, "%u\n", dd->cfgctxts -
+ dd->first_user_ctxt - (u32)qib_stats.sps_ctxts);
+}
+
static ssize_t show_serial(struct device *device,
struct device_attribute *attr, char *buf)
{
@@ -604,6 +616,7 @@ static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
static DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL);
static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
static DEVICE_ATTR(nctxts, S_IRUGO, show_nctxts, NULL);
+static DEVICE_ATTR(nfreectxts, S_IRUGO, show_nfreectxts, NULL);
static DEVICE_ATTR(serial, S_IRUGO, show_serial, NULL);
static DEVICE_ATTR(boardversion, S_IRUGO, show_boardversion, NULL);
static DEVICE_ATTR(logged_errors, S_IRUGO, show_logged_errs, NULL);
@@ -617,6 +630,7 @@ static struct device_attribute *qib_attributes[] = {
&dev_attr_board_id,
&dev_attr_version,
&dev_attr_nctxts,
+ &dev_attr_nfreectxts,
&dev_attr_serial,
&dev_attr_boardversion,
&dev_attr_logged_errors,

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