diff options
| author | Sunil Goutham <sgoutham@cavium.com> | 2017-05-02 16:06:55 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-02 22:41:21 +0300 |
| commit | c56d91ce38d54c0c0dd8d0e4c6a9e0cfa557152f (patch) | |
| tree | 3d2d5f802284396c8ad1d72f3782d9e6c963e1d1 /drivers/net/ethernet/cavium/thunder/nicvf_main.c | |
| parent | 05c773f52b96ef3fbc7d9bfa21caadc6247ef7a8 (diff) | |
| download | linux-c56d91ce38d54c0c0dd8d0e4c6a9e0cfa557152f.tar.xz | |
net: thunderx: Add support for XDP_DROP
Adds support for XDP_DROP.
Also since in XDP mode there is just a single buffer per page,
made changes to recycle DMA mapping info as well along with pages.
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/thunder/nicvf_main.c')
| -rw-r--r-- | drivers/net/ethernet/cavium/thunder/nicvf_main.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c index 9c48873350f8..a58cc1e7b94a 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c @@ -18,6 +18,7 @@ #include <linux/irq.h> #include <linux/iommu.h> #include <linux/bpf.h> +#include <linux/bpf_trace.h> #include <linux/filter.h> #include "nic_reg.h" @@ -505,6 +506,7 @@ static inline bool nicvf_xdp_rx(struct nicvf *nic, struct cqe_rx_t *cqe_rx) { struct xdp_buff xdp; + struct page *page; u32 action; u16 len; u64 dma_addr, cpu_addr; @@ -527,12 +529,27 @@ static inline bool nicvf_xdp_rx(struct nicvf *nic, switch (action) { case XDP_PASS: case XDP_TX: - case XDP_ABORTED: - case XDP_DROP: /* Pass on all packets to network stack */ return false; default: bpf_warn_invalid_xdp_action(action); + case XDP_ABORTED: + trace_xdp_exception(nic->netdev, prog, action); + case XDP_DROP: + page = virt_to_page(xdp.data); + /* Check if it's a recycled page, if not + * unmap the DMA mapping. + * + * Recycled page holds an extra reference. + */ + if (page_ref_count(page) == 1) { + dma_addr &= PAGE_MASK; + dma_unmap_page_attrs(&nic->pdev->dev, dma_addr, + RCV_FRAG_LEN, DMA_FROM_DEVICE, + DMA_ATTR_SKIP_CPU_SYNC); + } + put_page(page); + return true; } return false; } @@ -645,7 +662,7 @@ static void nicvf_rcv_pkt_handler(struct net_device *netdev, if (nicvf_xdp_rx(snic, nic->xdp_prog, cqe_rx)) return; - skb = nicvf_get_rcv_skb(snic, cqe_rx); + skb = nicvf_get_rcv_skb(snic, cqe_rx, nic->xdp_prog ? true : false); if (!skb) { netdev_dbg(nic->netdev, "Packet not received\n"); return; |