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| author |   Taehee Yoo <ap420073@gmail.com> | 2022-04-17 10:12:46 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-04-20 10:42:57 +0100 |
| commit | 26efaef759a1bc43e819ee44cfd8a1fc4514e8c9 (patch) | |
| tree | b2bc127d1596b9a0d85946cc13012a2d365eca2a /drivers/net/ethernet/aquantia/atlantic/aq_nic.h | |
| parent | net: atlantic: Implement xdp control plane (diff) | |
| download | linux-dev-26efaef759a1bc43e819ee44cfd8a1fc4514e8c9.tar.xz linux-dev-26efaef759a1bc43e819ee44cfd8a1fc4514e8c9.zip | |
net: atlantic: Implement xdp data plane
It supports XDP_PASS, XDP_DROP and multi buffer.
The new function aq_nic_xmit_xdpf() is used to send packet with
xdp_frame and internally it calls aq_nic_map_xdp().
AQC chip supports 32 multi-queues and 8 vectors(irq).
there are two option
1. under 8 cores and 4 tx queues per core.
2. under 4 cores and 8 tx queues per core.
Like ixgbe, these tx queues can be used only for XDP_TX, XDP_REDIRECT
queue. If so, no tx_lock is needed.
But this patchset doesn't use this strategy because getting hardware tx
queue index cost is too high.
So, tx_lock is used in the aq_nic_xmit_xdpf().
single-core, single queue, 80% cpu utilization.
30.75% bpf_prog_xxx_xdp_prog_tx [k] bpf_prog_xxx_xdp_prog_tx
10.35% [kernel] [k] aq_hw_read_reg <---------- here
4.38% [kernel] [k] get_page_from_freelist
single-core, 8 queues, 100% cpu utilization, half PPS.
45.56% [kernel] [k] aq_hw_read_reg <---------- here
17.58% bpf_prog_xxx_xdp_prog_tx [k] bpf_prog_xxx_xdp_prog_tx
4.72% [kernel] [k] hw_atl_b0_hw_ring_rx_receive
The new function __aq_ring_xdp_clean() is a xdp rx handler and this is
called only when XDP is attached.
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/aquantia/atlantic/aq_nic.h')
| -rw-r--r-- | drivers/net/ethernet/aquantia/atlantic/aq_nic.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.h b/drivers/net/ethernet/aquantia/atlantic/aq_nic.h index 47123baabd5e..935ba889bd9a 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.h +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.h @@ -180,6 +180,8 @@ void aq_nic_ndev_free(struct aq_nic_s *self); int aq_nic_start(struct aq_nic_s *self); unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb, struct aq_ring_s *ring); +int aq_nic_xmit_xdpf(struct aq_nic_s *aq_nic, struct aq_ring_s *tx_ring, + struct xdp_frame *xdpf); int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb); int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p); int aq_nic_get_regs_count(struct aq_nic_s *self); |