From: "Xueming(Steven) Li" <xuemingl@mellanox.com>
To: Olivier Matz <olivier.matz@6wind.com>
Cc: Thomas Monjalon <thomas@monjalon.net>,
Jingjing Wu <jingjing.wu@intel.com>,
Yongseok Koh <yskoh@mellanox.com>,
Shahaf Shuler <shahafs@mellanox.com>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 4/6] ethdev: introduce TX common tunnel offloads
Date: Tue, 16 Jan 2018 17:28:55 +0000 [thread overview]
Message-ID: <VI1PR05MB1678FA39647D90F9E3561298ACEA0@VI1PR05MB1678.eurprd05.prod.outlook.com> (raw)
In-Reply-To: <20180116171010.vt25o6uq3kb7cpzd@platinum>
Hi Olivier,
Thanks for looking into this.
> -----Original Message-----
> From: Olivier Matz [mailto:olivier.matz@6wind.com]
> Sent: Wednesday, January 17, 2018 1:10 AM
> To: Xueming(Steven) Li <xuemingl@mellanox.com>
> Cc: Thomas Monjalon <thomas@monjalon.net>; Jingjing Wu
> <jingjing.wu@intel.com>; Yongseok Koh <yskoh@mellanox.com>; Shahaf Shuler
> <shahafs@mellanox.com>; dev@dpdk.org
> Subject: Re: [PATCH 4/6] ethdev: introduce TX common tunnel offloads
>
> Hi Xueming,
>
> On Tue, Jan 09, 2018 at 10:11:08PM +0800, Xueming Li wrote:
> > This patch introduce new DEV_TX_OFFLOAD_GENERIC_TNL_CKSUM_TSO flag for
> > devices that support tunnel agnostic TX checksum and tso offloading.
> >
> > Checksum offset and TSO header length are calculated based on mbuf
> > inner length l*_len, outer_l*_len and tx offload flags PKT_TX_*,
> > tunnel header length is part of inner l2_len, so device HW do cheksum
> > and TSO calculation w/o knowledge of perticular tunnel type.
> >
> > When set application must guarantee that correct header types and
> > lengths for each inner and outer headers in mbuf header, no need to
> > specify tunnel type.
> >
> > Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> > ---
> > lib/librte_ether/rte_ethdev.h | 9 +++++++++
> > 1 file changed, 9 insertions(+)
> >
> > diff --git a/lib/librte_ether/rte_ethdev.h
> > b/lib/librte_ether/rte_ethdev.h index 57b61ed41..8457d01be 100644
> > --- a/lib/librte_ether/rte_ethdev.h
> > +++ b/lib/librte_ether/rte_ethdev.h
> > @@ -1003,6 +1003,15 @@ struct rte_eth_conf {
> > * the same mempool and has refcnt = 1.
> > */
> > #define DEV_TX_OFFLOAD_SECURITY 0x00020000
> > +/**< Device supports arbitrary tunnel chksum and tso offloading w/o
> knowing
> > + * tunnel detail. Checksum and TSO are calculated based on mbuf
> fields:
> > + * l*_len, outer_l*_len
> > + * PKT_TX_OUTER_IPV6, PKT_TX_IPV6
> > + * PKT_TX_IP_CKSUM, PKT_TX_TCP_CKSUM, PKT_TX_UDP_CKSUM
> > + * When set application must guarantee correct header fields, no need
> to
> > + * specify tunnel type PKT_TX_TUNNEL_* for HW.
> > + */
> > +#define DEV_TX_OFFLOAD_GENERIC_TNL_CKSUM_TSO 0x00040000
> >
> > struct rte_pci_device;
> >
>
> I'd like to have more details about this flag and its meaning.
>
> Let's say we want to do TSO on the following vxlan packet:
> Ether / IP1 / UDP / VXLAN / Ether / IP2 / TCP / Data
>
> With the current API, we need to pass the tunnel type to the hardware with
> the flag PKT_TX_TUNNEL_VXLAN. Thanks to that, the driver can forward this
> information to the hardware so it knows that the
> ip1->length, udp->length and optionally the udp->chksum have to be
> updated for each generated segment.
>
> With your proposal, if I understand properly, it is not expected to pass
> the tunnel type in the mbuf. So how can the hardware know if some fields
> have to be updated in the outer header?
I'm not expert on hardware, the driver has to supply outer and inner
L3/L4 offsets, types and which field(s) to fill checksum, no length update
as far as I know.
next prev parent reply other threads:[~2018-01-16 17:28 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-09 14:11 [dpdk-dev] [PATCH 0/6] Support generic tunnel TX csum and TSO Xueming Li
2018-01-09 14:11 ` [dpdk-dev] [PATCH 1/6] net/mlx5: support tx swp tunnel offloading Xueming Li
2018-01-29 15:08 ` [dpdk-dev] [PATCH v2 1/5] ethdev: introduce Tx generic tunnel offloads Xueming Li
2018-01-29 16:49 ` Ananyev, Konstantin
2018-01-30 3:01 ` Xueming(Steven) Li
2018-01-30 13:28 ` Ananyev, Konstantin
2018-01-30 15:27 ` Xueming(Steven) Li
2018-01-30 15:33 ` Ananyev, Konstantin
2018-01-30 15:47 ` Xueming(Steven) Li
2018-01-30 16:02 ` Ananyev, Konstantin
2018-01-30 16:10 ` Xueming(Steven) Li
2018-01-30 17:04 ` Ananyev, Konstantin
2018-01-30 17:54 ` Xueming(Steven) Li
2018-01-30 20:21 ` Thomas Monjalon
2018-01-31 15:20 ` Xueming(Steven) Li
2018-01-31 15:17 ` Xueming(Steven) Li
2018-01-29 15:08 ` [dpdk-dev] [PATCH v2 2/5] app/testpmd: testpmd support " Xueming Li
2018-01-29 15:08 ` [dpdk-dev] [PATCH v2 3/5] net/mlx5: separate TSO function in Tx data path Xueming Li
2018-01-29 15:08 ` [dpdk-dev] [PATCH v2 4/5] net/mlx5: support generic tunnel offloading Xueming Li
2018-01-29 15:08 ` [dpdk-dev] [PATCH v2 5/5] net/mlx5: allow max 192B TSO inline header length Xueming Li
2018-03-05 14:51 ` [dpdk-dev] [PATCH v3 0/7] support generic tunnel Tx checksum and TSO Xueming Li
2018-03-05 14:51 ` [dpdk-dev] [PATCH v3 1/7] ethdev: introduce Tx generic tunnel L3/L4 offload Xueming Li
2018-03-21 1:40 ` Yongseok Koh
2018-03-22 13:55 ` Xueming(Steven) Li
2018-03-28 12:52 ` Olivier Matz
2018-04-04 8:20 ` Xueming(Steven) Li
2018-03-05 14:51 ` [dpdk-dev] [PATCH v3 2/7] app/testpmd: testpmd support Tx generic tunnel offloads Xueming Li
2018-03-05 14:51 ` [dpdk-dev] [PATCH v3 3/7] app/testpmd: add more GRE extension to csum engine Xueming Li
2018-03-05 14:51 ` [dpdk-dev] [PATCH v3 4/7] app/testpmd: introduce VXLAN GPE to csum forwarding engine Xueming Li
2018-03-05 14:51 ` [dpdk-dev] [PATCH v3 5/7] net/mlx5: separate TSO function in Tx data path Xueming Li
2018-03-05 14:51 ` [dpdk-dev] [PATCH v3 6/7] net/mlx5: support generic tunnel offloading Xueming Li
2018-03-05 14:51 ` [dpdk-dev] [PATCH v3 7/7] net/mlx5: allow max 192B TSO inline header length Xueming Li
2018-04-08 12:32 ` [dpdk-dev] [PATCH v4 0/4] support Tx generic tunnel checksum and TSO Xueming Li
2018-04-17 14:43 ` [dpdk-dev] [PATCH v5 0/2] " Xueming Li
2018-04-17 14:47 ` [dpdk-dev] [PATCH v5 1/2] ethdev: introduce generic IP/UDP " Xueming Li
2018-04-17 21:21 ` Thomas Monjalon
2018-04-17 14:49 ` [dpdk-dev] [PATCH v5 2/2] app/testpmd: testpmd support Tx generic tunnel offloads Xueming Li
2018-04-18 13:38 ` [dpdk-dev] [PATCH v6 0/2] support Tx generic tunnel checksum and TSO Xueming Li
2018-04-18 13:58 ` [dpdk-dev] [PATCH v6 1/2] ethdev: introduce generic IP/UDP " Xueming Li
2018-04-18 14:28 ` Thomas Monjalon
2018-04-18 16:45 ` Ananyev, Konstantin
2018-04-18 18:02 ` Thomas Monjalon
2018-04-23 9:55 ` Olivier Matz
2018-04-20 12:48 ` [dpdk-dev] [PATCH v7 0/2] support Tx generic " Xueming Li
2018-04-23 11:36 ` [dpdk-dev] [PATCH v8 " Xueming Li
2018-04-23 16:17 ` Ferruh Yigit
2018-04-23 11:36 ` [dpdk-dev] [PATCH v8 1/2] ethdev: introduce generic IP/UDP " Xueming Li
2018-04-23 11:49 ` Xueming Li
2018-04-23 11:36 ` [dpdk-dev] [PATCH v8 2/2] app/testpmd: testpmd support Tx generic tunnel offloads Xueming Li
2018-04-20 12:48 ` [dpdk-dev] [PATCH v7 1/2] ethdev: introduce generic IP/UDP tunnel checksum and TSO Xueming Li
2018-04-23 9:59 ` Olivier Matz
2018-04-20 12:48 ` [dpdk-dev] [PATCH v7 2/2] app/testpmd: testpmd support Tx generic tunnel offloads Xueming Li
2018-04-18 13:59 ` [dpdk-dev] [PATCH v6 " Xueming Li
2018-04-08 12:32 ` [dpdk-dev] [PATCH v4 1/4] ethdev: introduce generic IP/UDP tunnel checksum and TSO Xueming Li
2018-04-16 22:42 ` Thomas Monjalon
2018-04-17 7:53 ` Xueming(Steven) Li
2018-04-17 8:10 ` Thomas Monjalon
2018-04-08 12:32 ` [dpdk-dev] [PATCH v4 2/4] app/testpmd: testpmd support Tx generic tunnel offloads Xueming Li
2018-04-17 14:24 ` Iremonger, Bernard
2018-04-17 15:44 ` Xueming(Steven) Li
2018-04-08 12:32 ` [dpdk-dev] [PATCH v4 3/4] app/testpmd: add more GRE extension to csum engine Xueming Li
2018-04-16 22:45 ` Thomas Monjalon
2018-04-17 5:19 ` Xueming(Steven) Li
2018-04-08 12:32 ` [dpdk-dev] [PATCH v4 4/4] app/testpmd: introduce VXLAN GPE to csum forwarding engine Xueming Li
2018-04-16 22:46 ` Thomas Monjalon
2018-04-17 13:56 ` Iremonger, Bernard
2018-04-17 14:12 ` Xueming(Steven) Li
2018-01-09 14:11 ` [dpdk-dev] [PATCH 2/6] net/mlx5: allow max 192B WQE TSO inline header length Xueming Li
2018-01-09 14:11 ` [dpdk-dev] [PATCH 3/6] net/mlx5: add SWP PCI parameter for TX common tunnel offloads Xueming Li
2018-01-09 14:11 ` [dpdk-dev] [PATCH 4/6] ethdev: introduce " Xueming Li
2018-01-11 18:38 ` Ferruh Yigit
2018-01-16 17:10 ` Olivier Matz
2018-01-16 17:28 ` Xueming(Steven) Li [this message]
2018-01-16 19:06 ` Shahaf Shuler
2018-01-22 12:46 ` Olivier Matz
2018-01-22 20:06 ` Shahaf Shuler
2018-01-17 0:50 ` Yongseok Koh
2018-01-09 14:11 ` [dpdk-dev] [PATCH 5/6] net/mlx5: support " Xueming Li
2018-01-09 14:11 ` [dpdk-dev] [PATCH 6/6] app/testpmd: testpmd " Xueming Li
2018-01-16 3:09 ` Lu, Wenzhuo
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