diff options
| author |   Jesper Dangaard Brouer <brouer@redhat.com> | 2020-05-14 12:50:29 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-05-14 21:21:55 -0700 |
| commit | fa6540b8efd8944f8627c2f304114663ef4aadc4 (patch) | |
| tree | b2e6d1f90196c4cd2761099f5587d7a7eee504fa /drivers | |
| parent | net: thunderx: Add XDP frame size (diff) | |
| download | wireguard-linux-fa6540b8efd8944f8627c2f304114663ef4aadc4.tar.xz wireguard-linux-fa6540b8efd8944f8627c2f304114663ef4aadc4.zip | |
nfp: Add XDP frame size to netronome driver
The netronome nfp driver use PAGE_SIZE when xdp_prog is set, but
xdp.data_hard_start begins at offset NFP_NET_RX_BUF_HEADROOM.
Thus, adjust for this when setting xdp.frame_sz, as it counts
from data_hard_start.
When doing XDP_TX this driver is smart and instead of a full DMA-map
does a DMA-sync on with packet length. As xdp_adjust_tail can now
grow packet length, add checks to make sure that grow size is within
the DMA-mapped size.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/bpf/158945342911.97035.11214251236208648808.stgit@firesoul
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 9bfb3b077bc1..0e0cc3d58bdc 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -1741,10 +1741,15 @@ nfp_net_tx_xdp_buf(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring, struct nfp_net_rx_buf *rxbuf, unsigned int dma_off, unsigned int pkt_len, bool *completed) { + unsigned int dma_map_sz = dp->fl_bufsz - NFP_NET_RX_BUF_NON_DATA; struct nfp_net_tx_buf *txbuf; struct nfp_net_tx_desc *txd; int wr_idx; + /* Reject if xdp_adjust_tail grow packet beyond DMA area */ + if (pkt_len + dma_off > dma_map_sz) + return false; + if (unlikely(nfp_net_tx_full(tx_ring, 1))) { if (!*completed) { nfp_net_xdp_complete(tx_ring); @@ -1817,6 +1822,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget) rcu_read_lock(); xdp_prog = READ_ONCE(dp->xdp_prog); true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz; + xdp.frame_sz = PAGE_SIZE - NFP_NET_RX_BUF_HEADROOM; xdp.rxq = &rx_ring->xdp_rxq; tx_ring = r_vec->xdp_ring; |