From: Somnath Kotur <somnath.kotur@xxxxxxxxxxxx> Use the page pool's ability to maintain DMA mappings for us. This avoids re-mapping of the recycled pages. Link: https://lore.kernel.org/netdev/20230728231829.235716-4-michael.chan@xxxxxxxxxxxx/ Cc: bpf@xxxxxxxxxxxxxxx Signed-off-by: Somnath Kotur <somnath.kotur@xxxxxxxxxxxx> Signed-off-by: Michael Chan <michael.chan@xxxxxxxxxxxx> --- v2: Use PAGE_SIZE for pp.max_len. --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 32 +++++++---------------- 1 file changed, 10 insertions(+), 22 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 6b815a2288e2..73a3936ee498 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -761,7 +761,6 @@ static struct page *__bnxt_alloc_rx_page(struct bnxt *bp, dma_addr_t *mapping, unsigned int *offset, gfp_t gfp) { - struct device *dev = &bp->pdev->dev; struct page *page; if (PAGE_SIZE > BNXT_RX_PAGE_SIZE) { @@ -774,12 +773,7 @@ static struct page *__bnxt_alloc_rx_page(struct bnxt *bp, dma_addr_t *mapping, if (!page) return NULL; - *mapping = dma_map_page_attrs(dev, page, *offset, BNXT_RX_PAGE_SIZE, - bp->rx_dir, DMA_ATTR_WEAK_ORDERING); - if (dma_mapping_error(dev, *mapping)) { - page_pool_recycle_direct(rxr->page_pool, page); - return NULL; - } + *mapping = page_pool_get_dma_addr(page) + *offset; return page; } @@ -998,8 +992,8 @@ static struct sk_buff *bnxt_rx_multi_page_skb(struct bnxt *bp, return NULL; } dma_addr -= bp->rx_dma_offset; - dma_unmap_page_attrs(&bp->pdev->dev, dma_addr, BNXT_RX_PAGE_SIZE, - bp->rx_dir, DMA_ATTR_WEAK_ORDERING); + dma_sync_single_for_cpu(&bp->pdev->dev, dma_addr, BNXT_RX_PAGE_SIZE, + bp->rx_dir); skb = build_skb(data_ptr - bp->rx_offset, BNXT_RX_PAGE_SIZE); if (!skb) { page_pool_recycle_direct(rxr->page_pool, page); @@ -1032,8 +1026,8 @@ static struct sk_buff *bnxt_rx_page_skb(struct bnxt *bp, return NULL; } dma_addr -= bp->rx_dma_offset; - dma_unmap_page_attrs(&bp->pdev->dev, dma_addr, BNXT_RX_PAGE_SIZE, - bp->rx_dir, DMA_ATTR_WEAK_ORDERING); + dma_sync_single_for_cpu(&bp->pdev->dev, dma_addr, BNXT_RX_PAGE_SIZE, + bp->rx_dir); if (unlikely(!payload)) payload = eth_get_headlen(bp->dev, data_ptr, len); @@ -1149,9 +1143,8 @@ static u32 __bnxt_rx_agg_pages(struct bnxt *bp, return 0; } - dma_unmap_page_attrs(&pdev->dev, mapping, BNXT_RX_PAGE_SIZE, - bp->rx_dir, - DMA_ATTR_WEAK_ORDERING); + dma_sync_single_for_cpu(&pdev->dev, mapping, BNXT_RX_PAGE_SIZE, + bp->rx_dir); total_frag_len += frag_len; prod = NEXT_RX_AGG(prod); @@ -2947,10 +2940,6 @@ static void bnxt_free_one_rx_ring_skbs(struct bnxt *bp, int ring_nr) rx_buf->data = NULL; if (BNXT_RX_PAGE_MODE(bp)) { - mapping -= bp->rx_dma_offset; - dma_unmap_page_attrs(&pdev->dev, mapping, - BNXT_RX_PAGE_SIZE, bp->rx_dir, - DMA_ATTR_WEAK_ORDERING); page_pool_recycle_direct(rxr->page_pool, data); } else { dma_unmap_single_attrs(&pdev->dev, mapping, @@ -2971,9 +2960,6 @@ static void bnxt_free_one_rx_ring_skbs(struct bnxt *bp, int ring_nr) if (!page) continue; - dma_unmap_page_attrs(&pdev->dev, rx_agg_buf->mapping, - BNXT_RX_PAGE_SIZE, bp->rx_dir, - DMA_ATTR_WEAK_ORDERING); rx_agg_buf->page = NULL; __clear_bit(i, rxr->rx_agg_bmap); @@ -3205,7 +3191,9 @@ static int bnxt_alloc_rx_page_pool(struct bnxt *bp, pp.nid = dev_to_node(&bp->pdev->dev); pp.napi = &rxr->bnapi->napi; pp.dev = &bp->pdev->dev; - pp.dma_dir = DMA_BIDIRECTIONAL; + pp.dma_dir = bp->rx_dir; + pp.max_len = PAGE_SIZE; + pp.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV; if (PAGE_SIZE > BNXT_RX_PAGE_SIZE) pp.flags |= PP_FLAG_PAGE_FRAG; -- 2.30.1
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