IB/rdmavt: Add support for rvt_query_device function
With this commit, the drivers using rdmavt need not define query_device
function. But they should fill in the IB device attributes structure
rvt_dev_info.dparms.props
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/sw/rdmavt/vt.c b/drivers/infiniband/sw/rdmavt/vt.c
index e75eb3d..f2b6438 100644
--- a/drivers/infiniband/sw/rdmavt/vt.c
+++ b/drivers/infiniband/sw/rdmavt/vt.c
@@ -68,10 +68,15 @@
struct ib_device_attr *props,
struct ib_udata *uhw)
{
+ struct rvt_dev_info *rdi = ib_to_rvt(ibdev);
+
+ if (uhw->inlen || uhw->outlen)
+ return -EINVAL;
/*
- * Return rvt_dev_info.props contents
+ * Return rvt_dev_info.dparms.props contents
*/
- return -EOPNOTSUPP;
+ *props = rdi->dparms.props;
+ return 0;
}
static int rvt_modify_device(struct ib_device *device,
diff --git a/include/rdma/rdma_vt.h b/include/rdma/rdma_vt.h
index e412e67..725778a 100644
--- a/include/rdma/rdma_vt.h
+++ b/include/rdma/rdma_vt.h
@@ -245,7 +245,10 @@
* allocating space for this structure.
*
* The driver will also be responsible for filling in certain members of
- * dparms.props
+ * dparms.props. The driver needs to fill in dparms exactly as it would
+ * want values reported to a ULP. This will be returned to the caller
+ * in rdmavt's device. The driver should also therefore refrain from
+ * modifying this directly after registration with rdmavt.
*/
/* Driver specific properties */