DPDK patches and discussions
 help / color / mirror / Atom feed
From: Somnath Kotur <somnath.kotur@broadcom.com>
To: dev@dpdk.org
Cc: ferruh.yigit@intel.com
Subject: [dpdk-dev] [RFC PATCH] mbuf: fix to update documentation of PKT_RX_QINQ_STRIPPED
Date: Mon, 16 Dec 2019 08:46:47 +0530
Message-ID: <20191216031647.7750-1-somnath.kotur@broadcom.com> (raw)

Certain hardware may be able to strip and/or save only the outermost
VLAN instead of both the VLANs in the mbuf in a QinQ scenario.
To handle such cases, we could re-interpret setting of just PKT_RX_QINQ_STRIPPED
to indicate that only the outermost VLAN has been stripped by the hardware and
saved in mbuf->vlan_tci_outer.
Only When both PKT_RX_QINQ_STRIPPED and PKT_RX_VLAN_STRIPPED are set, the 2 vlans
have been stripped by the hardware and their tci are saved in mbuf->vlan_tci (inner)
and mbuf->vlan_tci_outer (outer).

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: JP Lee <jongpil.lee@broadcom.com>
---
 lib/librte_mbuf/rte_mbuf_core.h | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/lib/librte_mbuf/rte_mbuf_core.h b/lib/librte_mbuf/rte_mbuf_core.h
index 9a8557d..db1070b 100644
--- a/lib/librte_mbuf/rte_mbuf_core.h
+++ b/lib/librte_mbuf/rte_mbuf_core.h
@@ -124,12 +124,19 @@
 #define PKT_RX_FDIR_FLX      (1ULL << 14)
 
 /**
- * The 2 vlans have been stripped by the hardware and their tci are
- * saved in mbuf->vlan_tci (inner) and mbuf->vlan_tci_outer (outer).
+ * The outer vlan has been stripped by the hardware and their tci are
+ * saved in mbuf->vlan_tci_outer (outer).
  * This can only happen if vlan stripping is enabled in the RX
  * configuration of the PMD.
- * When PKT_RX_QINQ_STRIPPED is set, the flags (PKT_RX_VLAN |
- * PKT_RX_VLAN_STRIPPED | PKT_RX_QINQ) must also be set.
+ * When PKT_RX_QINQ_STRIPPED is set, the flags (PKT_RX_VLAN |  PKT_RX_QINQ)
+ * must also be set.
+ * When both PKT_RX_QINQ_STRIPPED and PKT_RX_VLAN_STRIPPED are set, the 2 vlans
+ * have been stripped by the hardware and their tci are saved in
+ * mbuf->vlan_tci (inner) and mbuf->vlan_tci_outer (outer).
+ * This can only happen if vlan stripping is enabled in the RX configuration
+ * of the PMD.
+ * When PKT_RX_QINQ_STRIPPED and PKT_RX_VLAN_STRIPPED are set,
+ * (PKT_RX_VLAN | PKT_RX_QINQ) must also be set.
  */
 #define PKT_RX_QINQ_STRIPPED (1ULL << 15)
 
-- 
1.8.3.1


             reply	other threads:[~2019-12-16  3:17 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-16  3:16 Somnath Kotur [this message]
2019-12-16  6:31 ` Andrew Rybchenko
2019-12-16  8:47   ` Somnath Kotur
2019-12-16  9:13     ` Andrew Rybchenko
2019-12-24  3:16       ` Somnath Kotur
2019-12-24  9:53         ` Andrew Rybchenko
2019-12-27 14:50           ` Olivier Matz
2019-12-31  2:13             ` Somnath Kotur
2020-01-02 12:57             ` Andrew Rybchenko
2019-12-31  2:15           ` Somnath Kotur
2020-01-02 13:04             ` Andrew Rybchenko
2020-01-06  8:36               ` Somnath Kotur

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191216031647.7750-1-somnath.kotur@broadcom.com \
    --to=somnath.kotur@broadcom.com \
    --cc=dev@dpdk.org \
    --cc=ferruh.yigit@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

DPDK patches and discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror http://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ http://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git