[PATCH net-next V3 08/11] net/mlx5e: Use napi_alloc_skb for RX SKB allocations
From: Saeed Mahameed <hidden>
Date: 2016-04-20 19:03:09
Subsystem:
mellanox ethernet driver (mlx5e), mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Saeed Mahameed, Tariq Toukan, Mark Bloch, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Tariq Toukan <redacted> Instead of netdev_alloc_skb, we use the napi_alloc_skb function which is designated to allocate skbuff's for RX in a channel-specific NAPI instance, and implies the IP packet alignment. Signed-off-by: Tariq Toukan <redacted> Signed-off-by: Saeed Mahameed <redacted> --- drivers/net/ethernet/mellanox/mlx5/core/en.h | 1 - drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 4 ++-- drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 12 +++++------- 3 files changed, 7 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index c99fdff..303e6cd 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h@@ -93,7 +93,6 @@ #define MLX5E_SQ_BF_BUDGET 16 #define MLX5E_NUM_MAIN_GROUPS 9 -#define MLX5E_NET_IP_ALIGN 2 static inline u16 mlx5_min_rx_wqes(int wq_type, u32 wq_size) {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 942829e..9b17bc0 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c@@ -373,8 +373,8 @@ static int mlx5e_create_rq(struct mlx5e_channel *c, rq->wqe_sz = (priv->params.lro_en) ? priv->params.lro_wqe_sz : MLX5E_SW2HW_MTU(priv->netdev->mtu); - rq->wqe_sz = SKB_DATA_ALIGN(rq->wqe_sz + MLX5E_NET_IP_ALIGN); - byte_count = rq->wqe_sz - MLX5E_NET_IP_ALIGN; + rq->wqe_sz = SKB_DATA_ALIGN(rq->wqe_sz); + byte_count = rq->wqe_sz; byte_count |= MLX5_HW_START_PADDING; }
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index d71919c..5bdcc0b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c@@ -47,7 +47,7 @@ int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe *wqe, u16 ix) struct sk_buff *skb; dma_addr_t dma_addr; - skb = netdev_alloc_skb(rq->netdev, rq->wqe_sz); + skb = napi_alloc_skb(rq->cq.napi, rq->wqe_sz); if (unlikely(!skb)) return -ENOMEM;
@@ -61,10 +61,8 @@ int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe *wqe, u16 ix) if (unlikely(dma_mapping_error(rq->pdev, dma_addr))) goto err_free_skb; - skb_reserve(skb, MLX5E_NET_IP_ALIGN); - *((dma_addr_t *)skb->cb) = dma_addr; - wqe->data.addr = cpu_to_be64(dma_addr + MLX5E_NET_IP_ALIGN); + wqe->data.addr = cpu_to_be64(dma_addr); wqe->data.lkey = rq->mkey_be; rq->skb[ix] = skb;
@@ -701,9 +699,9 @@ void mlx5e_handle_rx_cqe_mpwrq(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe) goto mpwrq_cqe_out; } - skb = netdev_alloc_skb(rq->netdev, - ALIGN(MLX5_MPWRQ_SMALL_PACKET_THRESHOLD, - sizeof(long))); + skb = napi_alloc_skb(rq->cq.napi, + ALIGN(MLX5_MPWRQ_SMALL_PACKET_THRESHOLD, + sizeof(long))); if (unlikely(!skb)) goto mpwrq_cqe_out;
--
1.7.1