From a5a0c590166e39fa399940775e7bfd8e1a9356da Mon Sep 17 00:00:00 2001 From: Tariq Toukan Date: Thu, 15 Sep 2016 16:08:37 +0300 Subject: [PATCH] net/mlx5e: Introduce API for RX mapped pages Manage the allocation and deallocation of mapped RX pages only through dedicated API functions. Signed-off-by: Tariq Toukan Signed-off-by: Saeed Mahameed Signed-off-by: David S. Miller --- .../net/ethernet/mellanox/mlx5/core/en_rx.c | 46 +++++++++++-------- 1 file changed, 27 insertions(+), 19 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index 5d1b7b5e4f36..0c34daa04c43 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -305,26 +305,32 @@ static inline void mlx5e_post_umr_wqe(struct mlx5e_rq *rq, u16 ix) mlx5e_tx_notify_hw(sq, &wqe->ctrl, 0); } -static inline int mlx5e_alloc_and_map_page(struct mlx5e_rq *rq, - struct mlx5e_mpw_info *wi, - int i) +static inline int mlx5e_page_alloc_mapped(struct mlx5e_rq *rq, + struct mlx5e_dma_info *dma_info) { struct page *page = dev_alloc_page(); + if (unlikely(!page)) return -ENOMEM; - wi->umr.dma_info[i].page = page; - wi->umr.dma_info[i].addr = dma_map_page(rq->pdev, page, 0, PAGE_SIZE, - PCI_DMA_FROMDEVICE); - if (unlikely(dma_mapping_error(rq->pdev, wi->umr.dma_info[i].addr))) { + dma_info->page = page; + dma_info->addr = dma_map_page(rq->pdev, page, 0, PAGE_SIZE, + DMA_FROM_DEVICE); + if (unlikely(dma_mapping_error(rq->pdev, dma_info->addr))) { put_page(page); return -ENOMEM; } - wi->umr.mtt[i] = cpu_to_be64(wi->umr.dma_info[i].addr | MLX5_EN_WR); return 0; } +static inline void mlx5e_page_release(struct mlx5e_rq *rq, + struct mlx5e_dma_info *dma_info) +{ + dma_unmap_page(rq->pdev, dma_info->addr, PAGE_SIZE, DMA_FROM_DEVICE); + put_page(dma_info->page); +} + static int mlx5e_alloc_rx_umr_mpwqe(struct mlx5e_rq *rq, struct mlx5e_rx_wqe *wqe, u16 ix) @@ -336,10 +342,13 @@ static int mlx5e_alloc_rx_umr_mpwqe(struct mlx5e_rq *rq, int i; for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++) { - err = mlx5e_alloc_and_map_page(rq, wi, i); + struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[i]; + + err = mlx5e_page_alloc_mapped(rq, dma_info); if (unlikely(err)) goto err_unmap; - page_ref_add(wi->umr.dma_info[i].page, pg_strides); + wi->umr.mtt[i] = cpu_to_be64(dma_info->addr | MLX5_EN_WR); + page_ref_add(dma_info->page, pg_strides); wi->skbs_frags[i] = 0; } @@ -350,10 +359,10 @@ static int mlx5e_alloc_rx_umr_mpwqe(struct mlx5e_rq *rq, err_unmap: while (--i >= 0) { - dma_unmap_page(rq->pdev, wi->umr.dma_info[i].addr, PAGE_SIZE, - PCI_DMA_FROMDEVICE); - page_ref_sub(wi->umr.dma_info[i].page, pg_strides); - put_page(wi->umr.dma_info[i].page); + struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[i]; + + page_ref_sub(dma_info->page, pg_strides); + mlx5e_page_release(rq, dma_info); } return err; @@ -365,11 +374,10 @@ void mlx5e_free_rx_mpwqe(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi) int i; for (i = 0; i < MLX5_MPWRQ_PAGES_PER_WQE; i++) { - dma_unmap_page(rq->pdev, wi->umr.dma_info[i].addr, PAGE_SIZE, - PCI_DMA_FROMDEVICE); - page_ref_sub(wi->umr.dma_info[i].page, - pg_strides - wi->skbs_frags[i]); - put_page(wi->umr.dma_info[i].page); + struct mlx5e_dma_info *dma_info = &wi->umr.dma_info[i]; + + page_ref_sub(dma_info->page, pg_strides - wi->skbs_frags[i]); + mlx5e_page_release(rq, dma_info); } } -- GitLab