From: Lorenzo Bianconi <lorenzo@kernel.org>
To: netdev@vger.kernel.org
Cc: bpf@vger.kernel.org, davem@davemloft.net, ast@kernel.org,
brouer@redhat.com, daniel@iogearbox.net,
lorenzo.bianconi@redhat.com, echaudro@redhat.com,
sameehj@amazon.com, kuba@kernel.org
Subject: [RFC net-next 01/22] xdp: introduce mb in xdp_buff/xdp_frame
Date: Thu, 23 Jul 2020 13:42:13 +0200 [thread overview]
Message-ID: <1d3c0f39d41fd8268523c190c36fa7934d3b2e01.1595503780.git.lorenzo@kernel.org> (raw)
In-Reply-To: <cover.1595503780.git.lorenzo@kernel.org>
Introduce multi-buffer bit (mb) in xdp_frame/xdp_buffer to specify
if shared_info area has been properly initialized for non-linear
xdp buffers
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
include/net/xdp.h | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/include/net/xdp.h b/include/net/xdp.h
index dbe9c60797e1..2ef6935c5646 100644
--- a/include/net/xdp.h
+++ b/include/net/xdp.h
@@ -72,7 +72,8 @@ struct xdp_buff {
void *data_hard_start;
struct xdp_rxq_info *rxq;
struct xdp_txq_info *txq;
- u32 frame_sz; /* frame size to deduce data_hard_end/reserved tailroom*/
+ u32 frame_sz:31; /* frame size to deduce data_hard_end/reserved tailroom*/
+ u32 mb:1; /* xdp non-linear buffer */
};
/* Reserve memory area at end-of data area.
@@ -96,7 +97,8 @@ struct xdp_frame {
u16 len;
u16 headroom;
u32 metasize:8;
- u32 frame_sz:24;
+ u32 frame_sz:23;
+ u32 mb:1; /* xdp non-linear frame */
/* Lifetime of xdp_rxq_info is limited to NAPI/enqueue time,
* while mem info is valid on remote CPU.
*/
@@ -141,6 +143,7 @@ void xdp_convert_frame_to_buff(struct xdp_frame *frame, struct xdp_buff *xdp)
xdp->data_end = frame->data + frame->len;
xdp->data_meta = frame->data - frame->metasize;
xdp->frame_sz = frame->frame_sz;
+ xdp->mb = frame->mb;
}
static inline
@@ -167,6 +170,7 @@ int xdp_update_frame_from_buff(struct xdp_buff *xdp,
xdp_frame->headroom = headroom - sizeof(*xdp_frame);
xdp_frame->metasize = metasize;
xdp_frame->frame_sz = xdp->frame_sz;
+ xdp_frame->mb = xdp->mb;
return 0;
}
--
2.26.2
next prev parent reply other threads:[~2020-07-23 11:43 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-23 11:42 [RFC net-next 00/22] Introduce mb bit in xdp_buff/xdp_frame Lorenzo Bianconi
2020-07-23 11:42 ` Lorenzo Bianconi [this message]
2020-07-23 13:51 ` [RFC net-next 01/22] xdp: introduce mb " Jubran, Samih
2020-07-23 11:42 ` [RFC net-next 02/22] xdp: initialize xdp_buff mb bit to 0 in netif_receive_generic_xdp Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 03/22] net: virtio_net: initialize mb bit of xdp_buff to 0 Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 04/22] net: xen-netfront: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 05/22] net: veth: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 06/22] net: hv_netvsc: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 07/22] net: bnxt: initialize mb bit in " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 08/22] net: dpaa2: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 09/22] net: ti: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 10/22] net: nfp: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 11/22] net: mvpp2: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 12/22] net: sfc: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 13/22] net: qede: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 14/22] net: amazon: ena: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 15/22] net: cavium: thunder: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 16/22] net: socionext: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 17/22] net: tun: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 18/22] net: ixgbe: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 19/22] net: ice: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 20/22] net: i40e: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 21/22] net: mlx5: " Lorenzo Bianconi
2020-07-23 11:42 ` [RFC net-next 22/22] net: mlx4: " Lorenzo Bianconi
2020-07-28 14:48 ` [RFC net-next 00/22] Introduce mb bit in xdp_buff/xdp_frame Jesper Dangaard Brouer
2020-07-28 15:10 ` Lorenzo Bianconi
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