diff mbox series

[bpf-next,v3,10/21] ice: Implement VLAN tag hint

Message ID 20230719183734.21681-11-larysa.zaremba@intel.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series XDP metadata via kfuncs for ice | expand

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Commit Message

Larysa Zaremba July 19, 2023, 6:37 p.m. UTC 
Implement .xmo_rx_vlan_tag callback to allow XDP code to read
packet's VLAN tag.

At the same time, use vlan_tci instead of vlan_tag in touched code,
because vlan_tag is misleading.

Signed-off-by: Larysa Zaremba <larysa.zaremba@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_main.c     | 22 ++++++++++++++++
 drivers/net/ethernet/intel/ice/ice_txrx.c     |  6 ++---
 drivers/net/ethernet/intel/ice/ice_txrx.h     |  1 +
 drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 26 +++++++++++++++++++
 drivers/net/ethernet/intel/ice/ice_txrx_lib.h |  4 +--
 drivers/net/ethernet/intel/ice/ice_xsk.c      |  6 ++---
 6 files changed, 57 insertions(+), 8 deletions(-)

Comments

Simon Horman July 20, 2023, 6:50 p.m. UTC | #1 
On Wed, Jul 19, 2023 at 08:37:23PM +0200, Larysa Zaremba wrote:

...

> diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
> index b11cfaedb81c..4ad6db83674e 100644
> --- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
> +++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
> @@ -639,7 +639,33 @@ static int ice_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash,
>  	return 0;
>  }
>  
> +/**
> + * ice_xdp_rx_vlan_tag - VLAN tag XDP hint handler
> + * @ctx: XDP buff pointer
> + * @vlan_tci: destination address for VLAN tag
> + * @vlan_proto: destination address for VLAN protocol
> + *
> + * Copy VLAN tag (if was stripped) and corresponding protocol
> + * to the destination address.
> + */
> +static int ice_xdp_rx_vlan_tag(const struct xdp_md *ctx, u16 *vlan_tci,
> +			       __be16 *vlan_proto)
> +{
> +	const struct ice_xdp_buff *xdp_ext = (void *)ctx;
> +
> +	*vlan_proto = xdp_ext->pkt_ctx.vlan_proto;
> +	if (!*vlan_proto)
> +		return -ENODATA;
> +
> +	*vlan_tci = ice_get_vlan_tci(xdp_ext->pkt_ctx.eop_desc);
> +	if (!*vlan_tag)

Hi Larysa,

Should this be vlan_tci rather than vlan_tag?

> +		return -ENODATA;
> +
> +	return 0;
> +}
> +

...
Larysa Zaremba July 21, 2023, 7:38 a.m. UTC | #2 
On Thu, Jul 20, 2023 at 07:50:27PM +0100, Simon Horman wrote:
> On Wed, Jul 19, 2023 at 08:37:23PM +0200, Larysa Zaremba wrote:
> 
> ...
> 
> > diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
> > index b11cfaedb81c..4ad6db83674e 100644
> > --- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
> > +++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
> > @@ -639,7 +639,33 @@ static int ice_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash,
> >  	return 0;
> >  }
> >  
> > +/**
> > + * ice_xdp_rx_vlan_tag - VLAN tag XDP hint handler
> > + * @ctx: XDP buff pointer
> > + * @vlan_tci: destination address for VLAN tag
> > + * @vlan_proto: destination address for VLAN protocol
> > + *
> > + * Copy VLAN tag (if was stripped) and corresponding protocol
> > + * to the destination address.
> > + */
> > +static int ice_xdp_rx_vlan_tag(const struct xdp_md *ctx, u16 *vlan_tci,
> > +			       __be16 *vlan_proto)
> > +{
> > +	const struct ice_xdp_buff *xdp_ext = (void *)ctx;
> > +
> > +	*vlan_proto = xdp_ext->pkt_ctx.vlan_proto;
> > +	if (!*vlan_proto)
> > +		return -ENODATA;
> > +
> > +	*vlan_tci = ice_get_vlan_tci(xdp_ext->pkt_ctx.eop_desc);
> > +	if (!*vlan_tag)
> 
> Hi Larysa,
> 
> Should this be vlan_tci rather than vlan_tag?
> 

Yes! I have no idea, how this has happened >_<

> > +		return -ENODATA;
> > +
> > +	return 0;
> > +}
> > +
> 
> ...
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index dac523d5e579..cdfe257a5aa8 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -5937,6 +5937,23 @@  ice_fix_features(struct net_device *netdev, netdev_features_t features)
 	return features;
 }
 
+/**
+ * ice_set_rx_rings_vlan_proto - update rings with new stripped VLAN proto
+ * @vsi: PF's VSI
+ * @vlan_ethertype: VLAN ethertype (802.1Q or 802.1ad) in network byte order
+ *
+ * Store current stripped VLAN proto in ring packet context,
+ * so it can be accessed more efficiently by packet processing code.
+ */
+static void
+ice_set_rx_rings_vlan_proto(struct ice_vsi *vsi, __be16 vlan_ethertype)
+{
+	u16 i;
+
+	ice_for_each_alloc_rxq(vsi, i)
+		vsi->rx_rings[i]->pkt_ctx.vlan_proto = vlan_ethertype;
+}
+
 /**
  * ice_set_vlan_offload_features - set VLAN offload features for the PF VSI
  * @vsi: PF's VSI
@@ -5979,6 +5996,11 @@  ice_set_vlan_offload_features(struct ice_vsi *vsi, netdev_features_t features)
 	if (strip_err || insert_err)
 		return -EIO;
 
+	if (enable_stripping)
+		ice_set_rx_rings_vlan_proto(vsi, htons(vlan_ethertype));
+	else
+		ice_set_rx_rings_vlan_proto(vsi, 0);
+
 	return 0;
 }
 
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c
index 4e6546d9cf85..4fd7614f243d 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.c
@@ -1183,7 +1183,7 @@  int ice_clean_rx_irq(struct ice_rx_ring *rx_ring, int budget)
 		struct sk_buff *skb;
 		unsigned int size;
 		u16 stat_err_bits;
-		u16 vlan_tag = 0;
+		u16 vlan_tci;
 
 		/* get the Rx desc from Rx ring based on 'next_to_clean' */
 		rx_desc = ICE_RX_DESC(rx_ring, ntc);
@@ -1278,7 +1278,7 @@  int ice_clean_rx_irq(struct ice_rx_ring *rx_ring, int budget)
 			continue;
 		}
 
-		vlan_tag = ice_get_vlan_tag_from_rx_desc(rx_desc);
+		vlan_tci = ice_get_vlan_tci(rx_desc);
 
 		/* pad the skb if needed, to make a valid ethernet frame */
 		if (eth_skb_pad(skb))
@@ -1292,7 +1292,7 @@  int ice_clean_rx_irq(struct ice_rx_ring *rx_ring, int budget)
 
 		ice_trace(clean_rx_irq_indicate, rx_ring, rx_desc, skb);
 		/* send completed skb up the stack */
-		ice_receive_skb(rx_ring, skb, vlan_tag);
+		ice_receive_skb(rx_ring, skb, vlan_tci);
 
 		/* update budget accounting */
 		total_rx_pkts++;
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.h b/drivers/net/ethernet/intel/ice/ice_txrx.h
index 4237702a58a9..41e0b14e6643 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.h
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.h
@@ -260,6 +260,7 @@  enum ice_rx_dtype {
 struct ice_pkt_ctx {
 	const union ice_32b_rx_flex_desc *eop_desc;
 	u64 cached_phctime;
+	__be16 vlan_proto;
 };
 
 struct ice_xdp_buff {
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
index b11cfaedb81c..4ad6db83674e 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
@@ -639,7 +639,33 @@  static int ice_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash,
 	return 0;
 }
 
+/**
+ * ice_xdp_rx_vlan_tag - VLAN tag XDP hint handler
+ * @ctx: XDP buff pointer
+ * @vlan_tci: destination address for VLAN tag
+ * @vlan_proto: destination address for VLAN protocol
+ *
+ * Copy VLAN tag (if was stripped) and corresponding protocol
+ * to the destination address.
+ */
+static int ice_xdp_rx_vlan_tag(const struct xdp_md *ctx, u16 *vlan_tci,
+			       __be16 *vlan_proto)
+{
+	const struct ice_xdp_buff *xdp_ext = (void *)ctx;
+
+	*vlan_proto = xdp_ext->pkt_ctx.vlan_proto;
+	if (!*vlan_proto)
+		return -ENODATA;
+
+	*vlan_tci = ice_get_vlan_tci(xdp_ext->pkt_ctx.eop_desc);
+	if (!*vlan_tag)
+		return -ENODATA;
+
+	return 0;
+}
+
 const struct xdp_metadata_ops ice_xdp_md_ops = {
 	.xmo_rx_timestamp		= ice_xdp_rx_hw_ts,
 	.xmo_rx_hash			= ice_xdp_rx_hash,
+	.xmo_rx_vlan_tag		= ice_xdp_rx_vlan_tag,
 };
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.h b/drivers/net/ethernet/intel/ice/ice_txrx_lib.h
index 145883eec129..b7205826fea8 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.h
+++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.h
@@ -84,7 +84,7 @@  ice_build_ctob(u64 td_cmd, u64 td_offset, unsigned int size, u64 td_tag)
 }
 
 /**
- * ice_get_vlan_tag_from_rx_desc - get VLAN from Rx flex descriptor
+ * ice_get_vlan_tci - get VLAN TCI from Rx flex descriptor
  * @rx_desc: Rx 32b flex descriptor with RXDID=2
  *
  * The OS and current PF implementation only support stripping a single VLAN tag
@@ -92,7 +92,7 @@  ice_build_ctob(u64 td_cmd, u64 td_offset, unsigned int size, u64 td_tag)
  * one is found return the tag, else return 0 to mean no VLAN tag was found.
  */
 static inline u16
-ice_get_vlan_tag_from_rx_desc(union ice_32b_rx_flex_desc *rx_desc)
+ice_get_vlan_tci(const union ice_32b_rx_flex_desc *rx_desc)
 {
 	u16 stat_err_bits;
 
diff --git a/drivers/net/ethernet/intel/ice/ice_xsk.c b/drivers/net/ethernet/intel/ice/ice_xsk.c
index cde91a413661..8765f8347058 100644
--- a/drivers/net/ethernet/intel/ice/ice_xsk.c
+++ b/drivers/net/ethernet/intel/ice/ice_xsk.c
@@ -789,7 +789,7 @@  int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring, int budget)
 		struct xdp_buff *xdp;
 		struct sk_buff *skb;
 		u16 stat_err_bits;
-		u16 vlan_tag = 0;
+		u16 vlan_tci;
 
 		rx_desc = ICE_RX_DESC(rx_ring, rx_ring->next_to_clean);
 
@@ -858,10 +858,10 @@  int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring, int budget)
 		total_rx_bytes += skb->len;
 		total_rx_packets++;
 
-		vlan_tag = ice_get_vlan_tag_from_rx_desc(rx_desc);
+		vlan_tci = ice_get_vlan_tci(rx_desc);
 
 		ice_process_skb_fields(rx_ring, rx_desc, skb);
-		ice_receive_skb(rx_ring, skb, vlan_tag);
+		ice_receive_skb(rx_ring, skb, vlan_tci);
 	}
 
 	entries_to_alloc = ICE_DESC_UNUSED(rx_ring);