@@ -5327,6 +5327,48 @@ static void depopulate_specs_root(struct mlx5_ib_dev *dev)
uverbs_free_spec_tree(dev->ib_dev.specs_root);
}
+static int mlx5_ib_read_counters(struct ib_counters *counters,
+ struct ib_counters_read_attr *read_attr,
+ struct uverbs_attr_bundle *attrs)
+{
+ struct mlx5_ib_mcounters *mcounters = to_mcounters(counters);
+ struct mlx5_read_counters_attr mread_attr = {};
+ u32 *desc;
+ int ret, i;
+
+ mutex_lock(&mcounters->mcntrs_mutex);
+ if (mcounters->cntrs_max_index > read_attr->ncounters) {
+ ret = -EINVAL;
+ goto err_bound;
+ }
+
+ mread_attr.out = kcalloc(mcounters->counters_num, sizeof(u64),
+ GFP_KERNEL);
+ if (!mread_attr.out) {
+ ret = -ENOMEM;
+ goto err_bound;
+ }
+
+ mread_attr.hw_cntrs_hndl = mcounters->hw_cntrs_hndl;
+ mread_attr.flags = read_attr->flags;
+ ret = mcounters->read_counters(counters->device, &mread_attr);
+ if (ret)
+ goto err_read;
+
+ /* do the pass over the counters data array to assign according to the
+ * descriptions and indexing pairs
+ */
+ desc = mcounters->counters_data;
+ for (i = 0; i < mcounters->ncounters * 2; i += 2)
+ read_attr->counters_buff[desc[i + 1]] += mread_attr.out[desc[i]];
+
+err_read:
+ kfree(mread_attr.out);
+err_bound:
+ mutex_unlock(&mcounters->mcntrs_mutex);
+ return ret;
+}
+
static int mlx5_ib_destroy_counters(struct ib_counters *counters)
{
struct mlx5_ib_mcounters *mcounters = to_mcounters(counters);
@@ -5600,6 +5642,7 @@ int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev)
dev->ib_dev.driver_id = RDMA_DRIVER_MLX5;
dev->ib_dev.create_counters = mlx5_ib_create_counters;
dev->ib_dev.destroy_counters = mlx5_ib_destroy_counters;
+ dev->ib_dev.read_counters = mlx5_ib_read_counters;
err = init_node_data(dev);
if (err)