diff options
| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2017-04-27 21:06:17 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-30 22:37:00 -0400 |
| commit | 92e68195ebe914ae8b34cfb92148385a50454806 (patch) | |
| tree | afae4127dee3ba5aaa4d353a5a0f9a9f739d619e /drivers/net/ethernet/netronome/nfp/nfp_net.h | |
| parent | d78005a50f306edb000f0994f0470f151915cf90 (diff) | |
| download | linux-92e68195ebe914ae8b34cfb92148385a50454806.tar.bz2 | |
nfp: do simple XDP TX buffer recycling
On the RX path we follow the "drop if allocation of replacement
buffer fails" rule. With XDP we extended that to the TX action,
so if XDP prog returned TX but allocation of replacement RX buffer
failed, we will drop the packet.
To improve our XDP TX performance extend the idea of rings being
always full to XDP TX rings. Pre-fill the XDP TX rings with RX
buffers, and when XDP prog returns TX action swap the RX buffer
with the next buffer from the TX ring.
XDP TX complete will no longer free the buffers but let them
sit on the TX ring and wait for swap with RX buffer, instead.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfp_net.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h index 8f20fdef0754..e7e9a9848746 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -201,6 +201,7 @@ struct nfp_net_tx_buf { * @txds: Virtual address of TX ring in host memory * @dma: DMA address of the TX ring * @size: Size, in bytes, of the TX ring (needed to free) + * @is_xdp: Is this a XDP TX ring? */ struct nfp_net_tx_ring { struct nfp_net_r_vector *r_vec; @@ -221,6 +222,7 @@ struct nfp_net_tx_ring { dma_addr_t dma; unsigned int size; + bool is_xdp; } ____cacheline_aligned; /* RX and freelist descriptor format */ |