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Date: Sun, 3 Sep 2017 07:21:01 +0300
From: Saeed Mahameed <saeedm@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org, kernel-team@...com,
Tariq Toukan <tariqt@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 01/17] net/mlx5e: Reorganize struct mlx5e_rq
From: Tariq Toukan <tariqt@...lanox.com>
Bring fast-path fields together, and combine RX WQE mutual
exclusive fields into a union.
Page-reuse and XDP are mutually exclusive and cannot be used at
the same time.
Use a union to combine their footprints.
Signed-off-by: Tariq Toukan <tariqt@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en.h | 16 +++++++++-------
drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 10 +++++-----
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 13 ++++++-------
3 files changed, 20 insertions(+), 19 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 6c2abeccfa5a..d964db286c95 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -527,20 +527,24 @@ struct mlx5e_rq {
struct {
struct mlx5e_wqe_frag_info *frag_info;
u32 frag_sz; /* max possible skb frag_sz */
- bool page_reuse;
- bool xdp_xmit;
+ union {
+ bool page_reuse;
+ bool xdp_xmit;
+ };
} wqe;
struct {
struct mlx5e_mpw_info *info;
void *mtt_no_align;
+ u16 stride_sz;
+ u16 num_strides;
} mpwqe;
};
struct {
- u8 page_order;
u32 wqe_sz; /* wqe data buffer size */
+ u16 headroom;
+ u8 page_order;
u8 map_dir; /* dma map direction */
} buff;
- __be32 mkey_be;
struct device *pdev;
struct net_device *netdev;
@@ -555,7 +559,6 @@ struct mlx5e_rq {
unsigned long state;
int ix;
- u16 rx_headroom;
struct mlx5e_rx_am am; /* Adaptive Moderation */
@@ -565,9 +568,8 @@ struct mlx5e_rq {
/* control */
struct mlx5_wq_ctrl wq_ctrl;
+ __be32 mkey_be;
u8 wq_type;
- u32 mpwqe_stride_sz;
- u32 mpwqe_num_strides;
u32 rqn;
struct mlx5e_channel *channel;
struct mlx5_core_dev *mdev;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 85841e24c65b..94761d0e1b33 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -593,7 +593,7 @@ static int mlx5e_alloc_rq(struct mlx5e_channel *c,
}
rq->buff.map_dir = rq->xdp_prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE;
- rq->rx_headroom = params->rq_headroom;
+ rq->buff.headroom = params->rq_headroom;
switch (rq->wq_type) {
case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
@@ -615,10 +615,10 @@ static int mlx5e_alloc_rq(struct mlx5e_channel *c,
goto err_rq_wq_destroy;
}
- rq->mpwqe_stride_sz = BIT(params->mpwqe_log_stride_sz);
- rq->mpwqe_num_strides = BIT(params->mpwqe_log_num_strides);
+ rq->mpwqe.stride_sz = BIT(params->mpwqe_log_stride_sz);
+ rq->mpwqe.num_strides = BIT(params->mpwqe_log_num_strides);
- rq->buff.wqe_sz = rq->mpwqe_stride_sz * rq->mpwqe_num_strides;
+ rq->buff.wqe_sz = rq->mpwqe.stride_sz * rq->mpwqe.num_strides;
byte_count = rq->buff.wqe_sz;
err = mlx5e_create_rq_umr_mkey(mdev, rq);
@@ -665,7 +665,7 @@ static int mlx5e_alloc_rq(struct mlx5e_channel *c,
byte_count = rq->buff.wqe_sz;
/* calc the required page order */
- rq->wqe.frag_sz = MLX5_SKB_FRAG_SZ(rq->rx_headroom + byte_count);
+ rq->wqe.frag_sz = MLX5_SKB_FRAG_SZ(rq->buff.headroom + byte_count);
npages = DIV_ROUND_UP(rq->wqe.frag_sz, PAGE_SIZE);
rq->buff.page_order = order_base_2(npages);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index be8197a75a63..1b50f1e7e48a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -263,8 +263,7 @@ int mlx5e_alloc_rx_wqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe *wqe, u16 ix)
wi->offset = 0;
}
- wqe->data.addr = cpu_to_be64(wi->di.addr + wi->offset +
- rq->rx_headroom);
+ wqe->data.addr = cpu_to_be64(wi->di.addr + wi->offset + rq->buff.headroom);
return 0;
}
@@ -296,7 +295,7 @@ void mlx5e_dealloc_rx_wqe(struct mlx5e_rq *rq, u16 ix)
static inline int mlx5e_mpwqe_strides_per_page(struct mlx5e_rq *rq)
{
- return rq->mpwqe_num_strides >> MLX5_MPWRQ_WQE_PAGE_ORDER;
+ return rq->mpwqe.num_strides >> MLX5_MPWRQ_WQE_PAGE_ORDER;
}
static inline void mlx5e_add_skb_frag_mpwqe(struct mlx5e_rq *rq,
@@ -305,7 +304,7 @@ static inline void mlx5e_add_skb_frag_mpwqe(struct mlx5e_rq *rq,
u32 page_idx, u32 frag_offset,
u32 len)
{
- unsigned int truesize = ALIGN(len, rq->mpwqe_stride_sz);
+ unsigned int truesize = ALIGN(len, rq->mpwqe.stride_sz);
dma_sync_single_for_cpu(rq->pdev,
wi->umr.dma_info[page_idx].addr + frag_offset,
@@ -776,9 +775,9 @@ struct sk_buff *skb_from_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
struct mlx5e_wqe_frag_info *wi, u32 cqe_bcnt)
{
struct mlx5e_dma_info *di = &wi->di;
+ u16 rx_headroom = rq->buff.headroom;
struct sk_buff *skb;
void *va, *data;
- u16 rx_headroom = rq->rx_headroom;
bool consumed;
u32 frag_size;
@@ -911,7 +910,7 @@ static inline void mlx5e_mpwqe_fill_rx_skb(struct mlx5e_rq *rq,
struct sk_buff *skb)
{
u16 stride_ix = mpwrq_get_cqe_stride_index(cqe);
- u32 wqe_offset = stride_ix * rq->mpwqe_stride_sz;
+ u32 wqe_offset = stride_ix * rq->mpwqe.stride_sz;
u32 head_offset = wqe_offset & (PAGE_SIZE - 1);
u32 page_idx = wqe_offset >> PAGE_SHIFT;
u32 head_page_idx = page_idx;
@@ -979,7 +978,7 @@ void mlx5e_handle_rx_cqe_mpwrq(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
napi_gro_receive(rq->cq.napi, skb);
mpwrq_cqe_out:
- if (likely(wi->consumed_strides < rq->mpwqe_num_strides))
+ if (likely(wi->consumed_strides < rq->mpwqe.num_strides))
return;
mlx5e_free_rx_mpwqe(rq, wi);
--
2.13.0
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