[PATCH net-next v4 27/33] xdp: for Intel AF_XDP drivers add XDP frame_sz

Jesper Dangaard Brouer
2020-05-14T10:51:29Z

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.

Cc: intel-wired-lan@lists.osuosl.org
Cc: Björn Töpel <bjorn.topel@intel.com>
Cc: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
---
drivers/net/ethernet/intel/i40e/i40e_xsk.c | 2 ++
drivers/net/ethernet/intel/ice/ice_xsk.c | 2 ++
drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 2 ++
include/net/xdp_sock.h | 11 +++++++++++
4 files changed, 17 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_xsk.c b/drivers/net/ethernet/intel/i40e/i40e_xsk.c
index 0b7d29192b2c..2b9184aead5f 100644
--- 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 8279db15e870..23e5515d4527 100644
--- 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 74b540ebb3dc..a656ee9a1fae 100644
--- 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 e86ec48ef627..1cd1ec3cea97 100644
--- a/include/net/xdp_sock.h
+++ b/include/net/xdp_sock.h
@@ -237,6 +237,12 @@ 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)
{
@@ -367,6 +373,11 @@ 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;