xdp: For Intel AF_XDP drivers add XDP frame_sz

Intel drivers implement native AF_XDP zerocopy in separate C-files,
that have its own invocation of bpf_prog_run_xdp(). The setup of
xdp_buff is also handled in separately from normal code path.

This patch update XDP frame_sz for AF_XDP zerocopy drivers i40e, ice
and ixgbe, as the code changes needed are very similar.  Introduce a
helper function xsk_umem_xdp_frame_sz() for calculating frame size.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Cc: intel-wired-lan@lists.osuosl.org
Cc: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/bpf/158945347511.97035.8536753731329475655.stgit@firesoul

diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
index 0b7d291..2b9184a 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_xsk.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
@@ -531,12 +531,14 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
 {
        unsigned int total_rx_bytes = 0, total_rx_packets = 0;
        u16 cleaned_count = I40E_DESC_UNUSED(rx_ring);
+       struct xdp_umem *umem = rx_ring->xsk_umem;
        unsigned int xdp_res, xdp_xmit = 0;
        bool failure = false;
        struct sk_buff *skb;
        struct xdp_buff xdp;
 
        xdp.rxq = &rx_ring->xdp_rxq;
+       xdp.frame_sz = xsk_umem_xdp_frame_sz(umem);
 
        while (likely(total_rx_packets < (unsigned int)budget)) {
                struct i40e_rx_buffer *bi;

diff --git a/drivers/net/ethernet/intel/ice/ice_xsk.c b/drivers/net/ethernet/intel/ice/ice_xsk.c
index 8279db1..23e5515 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_xsk.c
+++ b/drivers/net/ethernet/intel/ice/ice_xsk.c
@@ -840,11 +840,13 @@ int ice_clean_rx_irq_zc(struct ice_ring *rx_ring, int budget)
 {
        unsigned int total_rx_bytes = 0, total_rx_packets = 0;
        u16 cleaned_count = ICE_DESC_UNUSED(rx_ring);
+       struct xdp_umem *umem = rx_ring->xsk_umem;
        unsigned int xdp_xmit = 0;
        bool failure = false;
        struct xdp_buff xdp;
 
        xdp.rxq = &rx_ring->xdp_rxq;
+       xdp.frame_sz = xsk_umem_xdp_frame_sz(umem);
 
        while (likely(total_rx_packets < (unsigned int)budget)) {
                union ice_32b_rx_flex_desc *rx_desc;

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
index 74b540e..a656ee9 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
@@ -431,12 +431,14 @@ int ixgbe_clean_rx_irq_zc(struct ixgbe_q_vector *q_vector,
        unsigned int total_rx_bytes = 0, total_rx_packets = 0;
        struct ixgbe_adapter *adapter = q_vector->adapter;
        u16 cleaned_count = ixgbe_desc_unused(rx_ring);
+       struct xdp_umem *umem = rx_ring->xsk_umem;
        unsigned int xdp_res, xdp_xmit = 0;
        bool failure = false;
        struct sk_buff *skb;
        struct xdp_buff xdp;
 
        xdp.rxq = &rx_ring->xdp_rxq;
+       xdp.frame_sz = xsk_umem_xdp_frame_sz(umem);
 
        while (likely(total_rx_packets < budget)) {
                union ixgbe_adv_rx_desc *rx_desc;

diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h
index 67191cc..abd72de 100644 (file)
--- a/include/net/xdp_sock.h
+++ b/include/net/xdp_sock.h
@@ -236,6 +236,12 @@ static inline u64 xsk_umem_adjust_offset(struct xdp_umem *umem, u64 address,
        else
                return address + offset;
 }
+
+static inline u32 xsk_umem_xdp_frame_sz(struct xdp_umem *umem)
+{
+       return umem->chunk_size_nohr + umem->headroom;
+}
+
 #else
 static inline int xsk_generic_rcv(struct xdp_sock *xs, struct xdp_buff *xdp)
 {
@@ -366,6 +372,11 @@ static inline u64 xsk_umem_adjust_offset(struct xdp_umem *umem, u64 handle,
        return 0;
 }
 
+static inline u32 xsk_umem_xdp_frame_sz(struct xdp_umem *umem)
+{
+       return 0;
+}
+
 static inline int __xsk_map_redirect(struct xdp_sock *xs, struct xdp_buff *xdp)
 {
        return -EOPNOTSUPP;