xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

dpaa2-eth: add XDP_REDIRECT support

Browse Source 
Implement support for the XDP_REDIRECT action.

The redirected frame is transmitted and confirmed on the regular Tx/Tx
conf queues. Frame is marked with the "XDP" type in the software
annotation, since it requires special treatment.

We don't have good hardware support for TX batching, so the
XDP_XMIT_FLUSH flag doesn't make a difference for now; ndo_xdp_xmit
performs the actual Tx operation on the spot.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ioana Radulescu
2019-03-01 17:47:24 +00:00
committed by David S. Miller
parent e3fdf6ba09
commit d678be1dc1
3 changed files with 176 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
View File

@@ -95,6 +95,7 @@
enum dpaa2_eth_swa_type {
DPAA2_ETH_SWA_SINGLE,
DPAA2_ETH_SWA_SG,
DPAA2_ETH_SWA_XDP,
};
/* Must keep this struct smaller than DPAA2_ETH_SWA_SIZE */
@@ -110,6 +111,10 @@ struct dpaa2_eth_swa {
int num_sg;
int sgt_size;
} sg;
struct {
int dma_size;
struct xdp_frame *xdpf;
} xdp;
};
};
@@ -273,6 +278,7 @@ struct dpaa2_eth_ch_stats {
__u64 xdp_drop;
__u64 xdp_tx;
__u64 xdp_tx_err;
__u64 xdp_redirect;
};
/* Maximum number of queues associated with a DPNI */
@@ -312,6 +318,7 @@ struct dpaa2_eth_ch_xdp {
struct bpf_prog *prog;
u64 drop_bufs[DPAA2_ETH_BUFS_PER_CMD];
int drop_cnt;
unsigned int res;
};
struct dpaa2_eth_channel {
@@ -326,6 +333,7 @@ struct dpaa2_eth_channel {
int buf_count;
struct dpaa2_eth_ch_stats stats;
struct dpaa2_eth_ch_xdp xdp;
struct xdp_rxq_info xdp_rxq;
};
struct dpaa2_eth_dist_fields {
@@ -446,6 +454,12 @@ unsigned int dpaa2_eth_needed_headroom(struct dpaa2_eth_priv *priv,
{
unsigned int headroom = DPAA2_ETH_SWA_SIZE;
/* If we don't have an skb (e.g. XDP buffer), we only need space for
* the software annotation area
*/
if (!skb)
return headroom;
/* For non-linear skbs we have no headroom requirement, as we build a
* SG frame with a newly allocated SGT buffer
*/