xdp: transition into using xdp_frame for ndo_xdp_xmit
Changing API ndo_xdp_xmit to take a struct xdp_frame instead of struct
xdp_buff. This brings xdp_return_frame and ndp_xdp_xmit in sync.
This builds towards changing the API further to become a bulk API,
because xdp_buff is not a queue-able object while xdp_frame is.
V4: Adjust for commit 59655a5b6c83 ("tuntap: XDP_TX can use native XDP")
V7: Adjust for commit d9314c474d4f ("i40e: add support for XDP_REDIRECT")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 4f28641..51e7d82 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -2262,7 +2262,7 @@ static struct sk_buff *ixgbe_build_skb(struct ixgbe_ring *rx_ring,
#define IXGBE_XDP_TX 2
static int ixgbe_xmit_xdp_ring(struct ixgbe_adapter *adapter,
- struct xdp_buff *xdp);
+ struct xdp_frame *xdpf);
static struct sk_buff *ixgbe_run_xdp(struct ixgbe_adapter *adapter,
struct ixgbe_ring *rx_ring,
@@ -2270,6 +2270,7 @@ static struct sk_buff *ixgbe_run_xdp(struct ixgbe_adapter *adapter,
{
int err, result = IXGBE_XDP_PASS;
struct bpf_prog *xdp_prog;
+ struct xdp_frame *xdpf;
u32 act;
rcu_read_lock();
@@ -2278,12 +2279,19 @@ static struct sk_buff *ixgbe_run_xdp(struct ixgbe_adapter *adapter,
if (!xdp_prog)
goto xdp_out;
+ prefetchw(xdp->data_hard_start); /* xdp_frame write */
+
act = bpf_prog_run_xdp(xdp_prog, xdp);
switch (act) {
case XDP_PASS:
break;
case XDP_TX:
- result = ixgbe_xmit_xdp_ring(adapter, xdp);
+ xdpf = convert_to_xdp_frame(xdp);
+ if (unlikely(!xdpf)) {
+ result = IXGBE_XDP_CONSUMED;
+ break;
+ }
+ result = ixgbe_xmit_xdp_ring(adapter, xdpf);
break;
case XDP_REDIRECT:
err = xdp_do_redirect(adapter->netdev, xdp, xdp_prog);
@@ -2386,7 +2394,6 @@ static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
xdp.data_hard_start = xdp.data -
ixgbe_rx_offset(rx_ring);
xdp.data_end = xdp.data + size;
- prefetchw(xdp.data_hard_start); /* xdp_frame write */
skb = ixgbe_run_xdp(adapter, rx_ring, &xdp);
}
@@ -8344,20 +8351,15 @@ static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
}
static int ixgbe_xmit_xdp_ring(struct ixgbe_adapter *adapter,
- struct xdp_buff *xdp)
+ struct xdp_frame *xdpf)
{
struct ixgbe_ring *ring = adapter->xdp_ring[smp_processor_id()];
struct ixgbe_tx_buffer *tx_buffer;
union ixgbe_adv_tx_desc *tx_desc;
- struct xdp_frame *xdpf;
u32 len, cmd_type;
dma_addr_t dma;
u16 i;
- xdpf = convert_to_xdp_frame(xdp);
- if (unlikely(!xdpf))
- return -EOVERFLOW;
-
len = xdpf->len;
if (unlikely(!ixgbe_desc_unused(ring)))
@@ -10010,7 +10012,7 @@ static int ixgbe_xdp(struct net_device *dev, struct netdev_bpf *xdp)
}
}
-static int ixgbe_xdp_xmit(struct net_device *dev, struct xdp_buff *xdp)
+static int ixgbe_xdp_xmit(struct net_device *dev, struct xdp_frame *xdpf)
{
struct ixgbe_adapter *adapter = netdev_priv(dev);
struct ixgbe_ring *ring;
@@ -10026,7 +10028,7 @@ static int ixgbe_xdp_xmit(struct net_device *dev, struct xdp_buff *xdp)
if (unlikely(!ring))
return -ENXIO;
- err = ixgbe_xmit_xdp_ring(adapter, xdp);
+ err = ixgbe_xmit_xdp_ring(adapter, xdpf);
if (err != IXGBE_XDP_TX)
return -ENOSPC;