net/mlx5e: Union RQ RX info per RQ type

We have two types of RX RQs, and they use two separate sets of
info arrays and structures in RX data path function.  Today those
structures are mutually exclusive per RQ type, hence one kind is
allocated on RQ creation according to the RQ type.

For better cache locality and to minimalize the
sizeof(struct mlx5e_rq), in this patch we define them as a union.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 16 insertions, 16 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index d09588b54c38..f2efa532f453 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -314,7 +314,7 @@ static inline void mlx5e_build_umr_wqe(struct mlx5e_rq *rq, struct mlx5e_sq *sq,
 	struct mlx5_wqe_ctrl_seg      *cseg = &wqe->ctrl;
 	struct mlx5_wqe_umr_ctrl_seg *ucseg = &wqe->uctrl;
 	struct mlx5_wqe_data_seg      *dseg = &wqe->data;
-	struct mlx5e_mpw_info *wi = &rq->wqe_info[ix];
+	struct mlx5e_mpw_info *wi = &rq->mpwqe.info[ix];
 	u8 ds_cnt = DIV_ROUND_UP(sizeof(*wqe), MLX5_SEND_WQE_DS);
 	u32 umr_wqe_mtt_offset = mlx5e_get_wqe_mtt_offset(rq, ix);
 
@@ -342,21 +342,21 @@ static int mlx5e_rq_alloc_mpwqe_info(struct mlx5e_rq *rq,
 	int mtt_alloc = mtt_sz + MLX5_UMR_ALIGN - 1;
 	int i;
 
-	rq->wqe_info = kzalloc_node(wq_sz * sizeof(*rq->wqe_info),
-				    GFP_KERNEL, cpu_to_node(c->cpu));
-	if (!rq->wqe_info)
+	rq->mpwqe.info = kzalloc_node(wq_sz * sizeof(*rq->mpwqe.info),
+				      GFP_KERNEL, cpu_to_node(c->cpu));
+	if (!rq->mpwqe.info)
 		goto err_out;
 
 	/* We allocate more than mtt_sz as we will align the pointer */
-	rq->mtt_no_align = kzalloc_node(mtt_alloc * wq_sz, GFP_KERNEL,
+	rq->mpwqe.mtt_no_align = kzalloc_node(mtt_alloc * wq_sz, GFP_KERNEL,
 					cpu_to_node(c->cpu));
-	if (unlikely(!rq->mtt_no_align))
+	if (unlikely(!rq->mpwqe.mtt_no_align))
 		goto err_free_wqe_info;
 
 	for (i = 0; i < wq_sz; i++) {
-		struct mlx5e_mpw_info *wi = &rq->wqe_info[i];
+		struct mlx5e_mpw_info *wi = &rq->mpwqe.info[i];
 
-		wi->umr.mtt = PTR_ALIGN(rq->mtt_no_align + i * mtt_alloc,
+		wi->umr.mtt = PTR_ALIGN(rq->mpwqe.mtt_no_align + i * mtt_alloc,
 					MLX5_UMR_ALIGN);
 		wi->umr.mtt_addr = dma_map_single(c->pdev, wi->umr.mtt, mtt_sz,
 						  PCI_DMA_TODEVICE);
@@ -370,14 +370,14 @@ static int mlx5e_rq_alloc_mpwqe_info(struct mlx5e_rq *rq,
 
 err_unmap_mtts:
 	while (--i >= 0) {
-		struct mlx5e_mpw_info *wi = &rq->wqe_info[i];
+		struct mlx5e_mpw_info *wi = &rq->mpwqe.info[i];
 
 		dma_unmap_single(c->pdev, wi->umr.mtt_addr, mtt_sz,
 				 PCI_DMA_TODEVICE);
 	}
-	kfree(rq->mtt_no_align);
+	kfree(rq->mpwqe.mtt_no_align);
 err_free_wqe_info:
-	kfree(rq->wqe_info);
+	kfree(rq->mpwqe.info);
 
 err_out:
 	return -ENOMEM;
@@ -390,13 +390,13 @@ static void mlx5e_rq_free_mpwqe_info(struct mlx5e_rq *rq)
 	int i;
 
 	for (i = 0; i < wq_sz; i++) {
-		struct mlx5e_mpw_info *wi = &rq->wqe_info[i];
+		struct mlx5e_mpw_info *wi = &rq->mpwqe.info[i];
 
 		dma_unmap_single(rq->pdev, wi->umr.mtt_addr, mtt_sz,
 				 PCI_DMA_TODEVICE);
 	}
-	kfree(rq->mtt_no_align);
-	kfree(rq->wqe_info);
+	kfree(rq->mpwqe.mtt_no_align);
+	kfree(rq->mpwqe.info);
 }
 
 static int mlx5e_create_rq(struct mlx5e_channel *c,
@@ -439,7 +439,7 @@ static int mlx5e_create_rq(struct mlx5e_channel *c,
 		rq->alloc_wqe = mlx5e_alloc_rx_mpwqe;
 		rq->dealloc_wqe = mlx5e_dealloc_rx_mpwqe;
 
-		rq->mpwqe_mtt_offset = c->ix *
+		rq->mpwqe.mtt_offset = c->ix *
 			MLX5E_REQUIRED_MTTS(1, BIT(priv->params.log_rq_size));
 
 		rq->mpwqe_stride_sz = BIT(priv->params.mpwqe_log_stride_sz);
@@ -654,7 +654,7 @@ static void mlx5e_free_rx_descs(struct mlx5e_rq *rq)
 
 	/* UMR WQE (if in progress) is always at wq->head */
 	if (test_bit(MLX5E_RQ_STATE_UMR_WQE_IN_PROGRESS, &rq->state))
-		mlx5e_free_rx_mpwqe(rq, &rq->wqe_info[wq->head]);
+		mlx5e_free_rx_mpwqe(rq, &rq->mpwqe.info[wq->head]);
 
 	while (!mlx5_wq_ll_is_empty(wq)) {
 		wqe_ix_be = *wq->tail_next;