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Commit 1a1e03dc authored by Raed Salem's avatar Raed Salem Committed by Leon Romanovsky
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IB/mlx5: Add counters read support 



This patch implements the uverbs counters read API, it will use the
specific read counters function to the given type to accomplish its
task.

Reviewed-by: default avatarYishai Hadas <yishaih@mellanox.com>
Signed-off-by: default avatarRaed Salem <raeds@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 5e95af5f

drivers/infiniband/hw/mlx5/main.c

+43 −0
Original line number Diff line number Diff line
@@ -5210,6 +5210,48 @@ 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 = {};

	struct mlx5_ib_flow_counters_desc *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; i++)

		read_attr->counters_buff[desc[i].index] += mread_attr.out[desc[i].description];



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);
@@ -5483,6 +5525,7 @@ 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)