From 8c42350116fe4ad23a5a813eba367355cfe7cff5 Mon Sep 17 00:00:00 2001 From: Charles McLachlan Date: Thu, 31 Oct 2019 10:23:10 +0000 Subject: sfc: support encapsulation of xdp_frames in efx_tx_buffer Add a field to efx_tx_buffer so that we can track xdp_frames. Add a flag so that buffers that contain xdp_frames can be identified and passed to xdp_return_frame. Signed-off-by: Charles McLachlan Acked-by: Jesper Dangaard Brouer Signed-off-by: David S. Miller --- drivers/net/ethernet/sfc/net_driver.h | 10 ++++++++-- drivers/net/ethernet/sfc/tx.c | 2 ++ 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h index 284a1b047ac2..7394d901e021 100644 --- a/drivers/net/ethernet/sfc/net_driver.h +++ b/drivers/net/ethernet/sfc/net_driver.h @@ -27,6 +27,7 @@ #include #include #include +#include #include "enum.h" #include "bitfield.h" @@ -136,7 +137,8 @@ struct efx_special_buffer { * struct efx_tx_buffer - buffer state for a TX descriptor * @skb: When @flags & %EFX_TX_BUF_SKB, the associated socket buffer to be * freed when descriptor completes - * @option: When @flags & %EFX_TX_BUF_OPTION, a NIC-specific option descriptor. + * @xdpf: When @flags & %EFX_TX_BUF_XDP, the XDP frame information; its @data + * member is the associated buffer to drop a page reference on. * @dma_addr: DMA address of the fragment. * @flags: Flags for allocation and DMA mapping type * @len: Length of this fragment. @@ -146,7 +148,10 @@ struct efx_special_buffer { * Only valid if @unmap_len != 0. */ struct efx_tx_buffer { - const struct sk_buff *skb; + union { + const struct sk_buff *skb; + struct xdp_frame *xdpf; + }; union { efx_qword_t option; dma_addr_t dma_addr; @@ -160,6 +165,7 @@ struct efx_tx_buffer { #define EFX_TX_BUF_SKB 2 /* buffer is last part of skb */ #define EFX_TX_BUF_MAP_SINGLE 8 /* buffer was mapped with dma_map_single() */ #define EFX_TX_BUF_OPTION 0x10 /* empty buffer for option descriptor */ +#define EFX_TX_BUF_XDP 0x20 /* buffer was sent with XDP */ /** * struct efx_tx_queue - An Efx TX queue diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c index 65e81ec1b314..204aafb3d96a 100644 --- a/drivers/net/ethernet/sfc/tx.c +++ b/drivers/net/ethernet/sfc/tx.c @@ -95,6 +95,8 @@ static void efx_dequeue_buffer(struct efx_tx_queue *tx_queue, netif_vdbg(tx_queue->efx, tx_done, tx_queue->efx->net_dev, "TX queue %d transmission id %x complete\n", tx_queue->queue, tx_queue->read_count); + } else if (buffer->flags & EFX_TX_BUF_XDP) { + xdp_return_frame_rx_napi(buffer->xdpf); } buffer->len = 0; -- cgit v1.2.3