diff options
| author |   Jesper Dangaard Brouer <brouer@redhat.com> | 2019-06-18 15:05:42 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-06-19 11:23:13 -0400 |
| commit | 29b006a67634e389ebc1b0c45e72a84d60118d6f (patch) | |
| tree | 183602d583d6a027b235f9bfdcb4f73fae747c22 | |
| parent | page_pool: introduce page_pool_free and use in mlx5 (diff) | |
| download | linux-dev-29b006a67634e389ebc1b0c45e72a84d60118d6f.tar.xz linux-dev-29b006a67634e389ebc1b0c45e72a84d60118d6f.zip | |
mlx5: more strict use of page_pool API
The mlx5 driver is using page_pool, but not for DMA-mapping (currently), and
is a little too relaxed about returning or releasing page resources, as it
is not strictly necessary, when not using DMA-mappings.
As this patchset is working towards tracking page_pool resources, to know
about in-flight frames on shutdown. Then fix places where mlx5 leak
page_pool resource.
In case of dma_mapping_error, then recycle into page_pool.
In mlx5e_free_rq() moved the page_pool_destroy() call to after the
mlx5e_page_release() calls, as it is more correct.
In mlx5e_page_release() when no recycle was requested, then release page
from the page_pool, via page_pool_release_page().
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 9 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 3 |
2 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index 46323709ad47..46b6a47bd1e3 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -625,10 +625,6 @@ static void mlx5e_free_rq(struct mlx5e_rq *rq) if (rq->xdp_prog) bpf_prog_put(rq->xdp_prog); - xdp_rxq_info_unreg(&rq->xdp_rxq); - if (rq->page_pool) - page_pool_destroy(rq->page_pool); - switch (rq->wq_type) { case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ: kvfree(rq->mpwqe.info); @@ -645,6 +641,11 @@ static void mlx5e_free_rq(struct mlx5e_rq *rq) mlx5e_page_release(rq, dma_info, false); } + + xdp_rxq_info_unreg(&rq->xdp_rxq); + if (rq->page_pool) + page_pool_destroy(rq->page_pool); + mlx5_wq_destroy(&rq->wq_ctrl); } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index 935bf62eddc1..234a3fd39901 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -248,7 +248,7 @@ static inline int mlx5e_page_alloc_mapped(struct mlx5e_rq *rq, dma_info->addr = dma_map_page(rq->pdev, dma_info->page, 0, PAGE_SIZE, rq->buff.map_dir); if (unlikely(dma_mapping_error(rq->pdev, dma_info->addr))) { - put_page(dma_info->page); + page_pool_recycle_direct(rq->page_pool, dma_info->page); dma_info->page = NULL; return -ENOMEM; } @@ -272,6 +272,7 @@ void mlx5e_page_release(struct mlx5e_rq *rq, struct mlx5e_dma_info *dma_info, page_pool_recycle_direct(rq->page_pool, dma_info->page); } else { mlx5e_page_dma_unmap(rq, dma_info); + page_pool_release_page(rq->page_pool, dma_info->page); put_page(dma_info->page); } } |