1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 89a2b21976d6..692d5ff657df 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2976,3 +2976,52 @@ bool __rdma_block_iter_next(struct ib_block_iter *biter)
 	return true;
 }
 EXPORT_SYMBOL(__rdma_block_iter_next);
+
+/**
+ * rdma_alloc_hw_stats_struct - Helper function to allocate dynamic struct
+ *   for the drivers.
+ * @descs: array of static descriptors
+ * @num_counters: number of elements in array
+ * @lifespan: milliseconds between updates
+ */
+struct rdma_hw_stats *rdma_alloc_hw_stats_struct(
+	const struct rdma_stat_desc *descs, int num_counters,
+	unsigned long lifespan)
+{
+	struct rdma_hw_stats *stats;
+
+	stats = kzalloc(struct_size(stats, value, num_counters), GFP_KERNEL);
+	if (!stats)
+		return NULL;
+
+	stats->is_disabled = kcalloc(BITS_TO_LONGS(num_counters),
+				     sizeof(*stats->is_disabled), GFP_KERNEL);
+	if (!stats->is_disabled)
+		goto err;
+
+	stats->descs = descs;
+	stats->num_counters = num_counters;
+	stats->lifespan = msecs_to_jiffies(lifespan);
+	mutex_init(&stats->lock);
+
+	return stats;
+
+err:
+	kfree(stats);
+	return NULL;
+}
+EXPORT_SYMBOL(rdma_alloc_hw_stats_struct);
+
+/**
+ * rdma_free_hw_stats_struct - Helper function to release rdma_hw_stats
+ * @stats: statistics to release
+ */
+void rdma_free_hw_stats_struct(struct rdma_hw_stats *stats)
+{
+	if (!stats)
+		return;
+
+	kfree(stats->is_disabled);
+	kfree(stats);
+}
+EXPORT_SYMBOL(rdma_free_hw_stats_struct);