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xdp: For Intel AF_XDP drivers add XDP frame_sz

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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
This commit is contained in:
Jesper Dangaard Brouer 2020-05-14 12:51:15 +02:00 committed by Alexei Starovoitov
parent d4ecdbf7aa
commit 2a637c5b1a
4 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/intel/i40e/i40e_xsk.c
View File

@ -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;

2
drivers/net/ethernet/intel/ice/ice_xsk.c
View File

@ -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;

2
drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c
View File

@ -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;

11
include/net/xdp_sock.h
View File

@ -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;