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[RFC,bpf-next,07/12] net: added netdevice operation for Tx

Message ID 20180515190615.23099-8-bjorn.topel@gmail.com
State RFC, archived
Delegated to: BPF Maintainers
Headers show
Series AF_XDP, zero-copy support | expand

Commit Message

Björn Töpel May 15, 2018, 7:06 p.m. UTC 
From: Magnus Karlsson <magnus.karlsson@intel.com>

Added ndo_xsk_async_xmit. This ndo "kicks" the netdev to start pull
userland Tx frames from a NAPI context.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
---
 include/linux/netdevice.h | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 2084536ad4af..8f4292dc6670 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1385,6 +1385,12 @@  struct net_device_ops {
 	int			(*ndo_xdp_xmit)(struct net_device *dev,
 						struct xdp_frame *xdp);
 	void			(*ndo_xdp_flush)(struct net_device *dev);
+	/* AF_XDP Tx function. NB! That in the PoC we take ownership
+	 * of the XDP Tx rings, so you wont be able to XDP_REDIRECT
+	 * there...
+	 */
+	int			(*ndo_xsk_async_xmit)(struct net_device *dev,
+						      u32 queue_id);
 };
 
 /**