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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: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Raed Salem <raeds@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Raed Salem 2018-05-31 16:43:41 +03:00 committed by Leon Romanovsky
parent 5e95af5f7b
commit 1a1e03dc15
1 changed files with 43 additions and 0 deletions
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43
drivers/infiniband/hw/mlx5/main.c
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@ -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)