From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Chan Subject: [PATCH net-next 02/10] bnxt_en: Add bp->rx_dir field for rx buffer DMA direction. Date: Mon, 30 Jan 2017 20:49:27 -0500 Message-ID: <1485827375-20421-3-git-send-email-michael.chan@broadcom.com> References: <1485827375-20421-1-git-send-email-michael.chan@broadcom.com> Cc: netdev@vger.kernel.org To: davem@davemloft.net Return-path: Received: from mail-pf0-f172.google.com ([209.85.192.172]:36681 "EHLO mail-pf0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751702AbdAaBur (ORCPT ); Mon, 30 Jan 2017 20:50:47 -0500 Received: by mail-pf0-f172.google.com with SMTP id 189so96674753pfu.3 for ; Mon, 30 Jan 2017 17:49:57 -0800 (PST) In-Reply-To: <1485827375-20421-1-git-send-email-michael.chan@broadcom.com> Sender: netdev-owner@vger.kernel.org List-ID: When driver is running in XDP mode, rx buffers are DMA mapped as DMA_BIDIRECTIONAL. Add a field so the code will map/unmap rx buffers according to this field. Signed-off-by: Michael Chan --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 22 ++++++++++------------ drivers/net/ethernet/broadcom/bnxt/bnxt.h | 1 + 2 files changed, 11 insertions(+), 12 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index d419199..c343ade 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -584,7 +584,7 @@ static inline u8 *__bnxt_alloc_rx_data(struct bnxt *bp, dma_addr_t *mapping, return NULL; *mapping = dma_map_single(&pdev->dev, data + BNXT_RX_DMA_OFFSET, - bp->rx_buf_use_size, PCI_DMA_FROMDEVICE); + bp->rx_buf_use_size, bp->rx_dir); if (dma_mapping_error(&pdev->dev, *mapping)) { kfree(data); @@ -771,7 +771,7 @@ static struct sk_buff *bnxt_rx_skb(struct bnxt *bp, skb = build_skb(data, 0); dma_unmap_single(&bp->pdev->dev, dma_addr, bp->rx_buf_use_size, - PCI_DMA_FROMDEVICE); + bp->rx_dir); if (!skb) { kfree(data); return NULL; @@ -877,15 +877,14 @@ static inline struct sk_buff *bnxt_copy_skb(struct bnxt_napi *bnapi, u8 *data, if (!skb) return NULL; - dma_sync_single_for_cpu(&pdev->dev, mapping, - bp->rx_copy_thresh, PCI_DMA_FROMDEVICE); + dma_sync_single_for_cpu(&pdev->dev, mapping, bp->rx_copy_thresh, + bp->rx_dir); memcpy(skb->data - NET_IP_ALIGN, data - NET_IP_ALIGN, len + NET_IP_ALIGN); - dma_sync_single_for_device(&pdev->dev, mapping, - bp->rx_copy_thresh, - PCI_DMA_FROMDEVICE); + dma_sync_single_for_device(&pdev->dev, mapping, bp->rx_copy_thresh, + bp->rx_dir); skb_put(skb, len); return skb; @@ -1260,7 +1259,7 @@ static inline struct sk_buff *bnxt_tpa_end(struct bnxt *bp, skb = build_skb(data, 0); dma_unmap_single(&bp->pdev->dev, mapping, bp->rx_buf_use_size, - PCI_DMA_FROMDEVICE); + bp->rx_dir); if (!skb) { kfree(data); @@ -1879,8 +1878,7 @@ static void bnxt_free_rx_skbs(struct bnxt *bp) dma_unmap_single( &pdev->dev, dma_unmap_addr(tpa_info, mapping), - bp->rx_buf_use_size, - PCI_DMA_FROMDEVICE); + bp->rx_buf_use_size, bp->rx_dir); tpa_info->data = NULL; @@ -1897,8 +1895,7 @@ static void bnxt_free_rx_skbs(struct bnxt *bp) dma_unmap_single(&pdev->dev, dma_unmap_addr(rx_buf, mapping), - bp->rx_buf_use_size, - PCI_DMA_FROMDEVICE); + bp->rx_buf_use_size, bp->rx_dir); rx_buf->data = NULL; @@ -2563,6 +2560,7 @@ void bnxt_set_ring_params(struct bnxt *bp) static int bnxt_set_rx_skb_mode(struct bnxt *bp) { + bp->rx_dir = DMA_FROM_DEVICE; bp->rx_skb_func = bnxt_rx_skb; return 0; } diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h index 33302b0..b0da02d 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h @@ -997,6 +997,7 @@ struct bnxt { u32 rx_buf_size; u32 rx_buf_use_size; /* useable size */ + enum dma_data_direction rx_dir; u32 rx_ring_size; u32 rx_agg_ring_size; u32 rx_copy_thresh; -- 1.8.3.1