From: Bing Zhao <bingz@nvidia.com>
To: Ori Kam <orika@nvidia.com>,
NBU-Contact-Thomas Monjalon <thomas@monjalon.net>,
"ferruh.yigit@intel.com" <ferruh.yigit@intel.com>,
"arybchenko@solarflare.com" <arybchenko@solarflare.com>,
"mdr@ashroe.eu" <mdr@ashroe.eu>,
"nhorman@tuxdriver.com" <nhorman@tuxdriver.com>,
"bernard.iremonger@intel.com" <bernard.iremonger@intel.com>,
"beilei.xing@intel.com" <beilei.xing@intel.com>,
"wenzhuo.lu@intel.com" <wenzhuo.lu@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 1/4] ethdev: add hairpin bind and unbind APIs
Date: Wed, 7 Oct 2020 11:21:44 +0000 [thread overview]
Message-ID: <CY4PR1201MB00729A6706AB43264C54A71FD00A0@CY4PR1201MB0072.namprd12.prod.outlook.com> (raw)
In-Reply-To: <MN2PR12MB428657D6959A2F3B0719D58CD60F0@MN2PR12MB4286.namprd12.prod.outlook.com>
Hi Ori,
> -----Original Message-----
> From: Ori Kam <orika@nvidia.com>
> Sent: Sunday, October 4, 2020 5:20 PM
> To: Bing Zhao <bingz@nvidia.com>; NBU-Contact-Thomas Monjalon
> <thomas@monjalon.net>; ferruh.yigit@intel.com;
> arybchenko@solarflare.com; mdr@ashroe.eu; nhorman@tuxdriver.com;
> bernard.iremonger@intel.com; beilei.xing@intel.com;
> wenzhuo.lu@intel.com
> Cc: dev@dpdk.org
> Subject: RE: [PATCH 1/4] ethdev: add hairpin bind and unbind APIs
>
> Hi Bing,
>
> PSB,
>
> Thanks,
> Ori
> > -----Original Message-----
> > From: Bing Zhao <bingz@nvidia.com>
> > Sent: Thursday, October 1, 2020 3:26 AM
> > Cc: dev@dpdk.org
> > Subject: [PATCH 1/4] ethdev: add hairpin bind and unbind APIs
> >
> > In single port hairpin mode, all the hairpin TX and RX queues
> belong
> > to the same device. After the queues are set up properly, there is
> no
> > other dependency between the TX queue and its RX peer queue. The
> > binding process that connected the TX and RX queues together from
> > hardware level will be done automatically during the device start
> > procedure. Everything required is configured and initialized
> already
> > for the binding process.
> >
> > But in two ports hairpin mode, there will be some cross-
> dependences
> > between two different ports. Usually, the ports will be
> initialized
> > serially by the main thread but not in parallel. The earlier port
> will
> > not be able to enable the bind if the following peer port is not
> yet
> > configured with HW resources. What's more, if one port is detached
> /
> > attached dynamically, it would introduce more trouble for the
> hairpin
> > binding.
> >
> > To overcome these, new APIs for binding and unbinding are added.
> > During startup, only the hairpin TX and RX peer queues will be set
> up.
> > Nothing will be done when starting the device if the queues are
> > without auto-bind attribute. Only after the required ports pair
> > started, the `rte_eth_hairpin_bind()` API can be called to bind
> the
> > all TX queues of the egress port to the RX queues of the peer port.
> > Then the connection between the egress and ingress ports pair will
> be
> > established.
> >
> > The `rte_eth_hairpin_unbind()` API could be used to disconnect the
> > egress and the peer ingress ports. This should only be called
> before
> > the device is closed if needed. When doing the clean up, all the
> > egress and ingress pairs related to a single port should be taken
> into
> > consideration.
> >
> > Signed-off-by: Bing Zhao <bingz@nvidia.com>
> > ---
> > lib/librte_ethdev/rte_ethdev.c | 107
> > +++++++++++++++++++++++++++++++
> > lib/librte_ethdev/rte_ethdev.h | 51 +++++++++++++++
> > lib/librte_ethdev/rte_ethdev_driver.h | 52 +++++++++++++++
> > lib/librte_ethdev/rte_ethdev_version.map | 2 +
> > 4 files changed, 212 insertions(+)
> >
> > diff --git a/lib/librte_ethdev/rte_ethdev.c
> > b/lib/librte_ethdev/rte_ethdev.c index dfe5c1b..72f567b 100644
> > --- a/lib/librte_ethdev/rte_ethdev.c
> > +++ b/lib/librte_ethdev/rte_ethdev.c
> > @@ -2175,6 +2175,113 @@ rte_eth_tx_hairpin_queue_setup(uint16_t
> > port_id, uint16_t tx_queue_id,
> > return eth_err(port_id, ret);
> > }
> >
> > +int
> > +rte_eth_hairpin_bind(uint16_t tx_port, uint16_t rx_port) {
> > + struct rte_eth_dev *dev;
> > + struct rte_eth_dev *rdev;
> > + uint16_t p;
> > + uint16_t rp;
> > + int ret = 0;
> > +
> > + RTE_ETH_VALID_PORTID_OR_ERR_RET(tx_port, -EINVAL);
> > + dev = &rte_eth_devices[tx_port];
> > + if (!dev->data->dev_started) {
> > + RTE_ETHDEV_LOG(ERR, "TX port %d is not started",
> tx_port);
> > + return -EBUSY;
> > + }
> > +
> > + /*
> > + * If the all the ports probed belong to two or more separate
> NICs, it
> > + * is recommended that each pair is bound independently but
> not in the
> > + * loop to bind all ports.
> > + */
>
> I don't understand your comment.
I mean, in the following loops, if the application wants to bind one TX port to all the other RX ports, it would not be supported between different PMDs or different NICs. Then the roll-back actions will be done and no hairpin port peers will work successfully.
>
> > + if (rx_port == RTE_MAX_ETHPORTS) {
>
> I think maybe this should be done in the tx queue. Since if the bind
> don't need some port why do we care if it is started?
Do you mean the checking in the RX ports loop below? At first, I intended to make sure this API would be called only after all the ports are started.
But yes, there is no need if some port is not being used.
> So either add a new function to get all peer ports from the tx port,
> or move this logic to the Target PMD.
There would be one more API to be introduced. To my understanding, it would be more appropriate if we add a new API here.
But it would keep RTE simpler if we move such logic into the PMD.
>
> > + RTE_ETH_FOREACH_DEV(p) {
> > + rdev = &rte_eth_devices[p];
> > + if (!rdev->data->dev_started) {
> > + RTE_ETHDEV_LOG(ERR,
> > + "RX port %d is not started", p);
> > + ret = -EBUSY;
> > + goto unbind;
> > + }
> > + ret = (*dev->dev_ops->hairpin_bind)(dev, p);
> > + if (ret) {
> > + RTE_ETHDEV_LOG(ERR, "Failed to bind hairpin
> > TX "
> > + "%d to RX %d", tx_port, p);
> > + goto unbind;
> > + }
> > + }
> > + } else {
> > + RTE_ETH_VALID_PORTID_OR_ERR_RET(rx_port, -EINVAL);
> > + rdev = &rte_eth_devices[rx_port];
> > + if (!rdev->data->dev_started) {
> > + RTE_ETHDEV_LOG(ERR,
> > + "RX port %d is not started", rx_port);
> > + return -EBUSY;
> > + }
> > + ret = (*dev->dev_ops->hairpin_bind)(dev, rx_port);
> > + if (ret)
> > + RTE_ETHDEV_LOG(ERR, "Failed to bind hairpin TX %d
> "
> > + "to RX %d", tx_port, rx_port);
> > + }
> > +
> > + return ret;
> > +
> > +unbind:
> > + /* Roll back the previous binding process. */
> > + RTE_ETH_FOREACH_DEV(rp) {
> > + if (rp < p)
> > + (*dev->dev_ops->hairpin_unbind)(dev, rp);
> > + else
> > + break;
> > + }
> > + return ret;
> > +}
> > +
> > +int
> > +rte_eth_hairpin_unbind(uint16_t tx_port, uint16_t rx_port) {
> > + struct rte_eth_dev *dev;
> > + struct rte_eth_dev *rdev;
> > + uint16_t p;
> > + int ret = 0;
> > +
> > + RTE_ETH_VALID_PORTID_OR_ERR_RET(tx_port, -EINVAL);
> > + dev = &rte_eth_devices[tx_port];
> > + if (!dev->data->dev_started) {
> > + RTE_ETHDEV_LOG(ERR, "TX port %d is stopped", tx_port);
> > + return -EBUSY;
> > + }
> > +
> > + if (rx_port == RTE_MAX_ETHPORTS) {
> > + RTE_ETH_FOREACH_DEV(p) {
> > + rdev = &rte_eth_devices[p];
> > + if (!rdev->data->dev_started) {
>
> This condition should never be true.
> First see my comment above about the list of devices, second port
> should fail to stop if it is bounded.
Thank, I will remove this check and make the logic the same as "bind" API.
When stopping the second port, PMD will check if any peer port is bound and return a failure then.
>
> > + RTE_ETHDEV_LOG(ERR, "RX port %d is
> > stopped", p);
> > + ret = -EBUSY;
> > + break;
> > + }
> > + ret = (*dev->dev_ops->hairpin_unbind)(dev, p);
> > + if (ret) {
> > + RTE_ETHDEV_LOG(ERR, "Failed to unbind
> > hairpin "
> > + "TX %d from RX %d", tx_port, p);
> > + break;
> > + }
> > + }
> > + } else {
> > + RTE_ETH_VALID_PORTID_OR_ERR_RET(rx_port, -EINVAL);
> > + rdev = &rte_eth_devices[rx_port];
> > + if (!rdev->data->dev_started) {
> > + RTE_ETHDEV_LOG(ERR, "RX port %d is stopped",
> > rx_port);
> > + return -EBUSY;
> > + }
> > + ret = (*dev->dev_ops->hairpin_unbind)(dev, rx_port);
> > + }
> > +
> > + return ret;
> > +}
> > +
> > void
> > rte_eth_tx_buffer_drop_callback(struct rte_mbuf **pkts, uint16_t
> unsent,
> > void *userdata __rte_unused)
> > diff --git a/lib/librte_ethdev/rte_ethdev.h
> > b/lib/librte_ethdev/rte_ethdev.h index 645a186..c3fb684 100644
> > --- a/lib/librte_ethdev/rte_ethdev.h
> > +++ b/lib/librte_ethdev/rte_ethdev.h
> > @@ -2133,6 +2133,57 @@ int rte_eth_tx_hairpin_queue_setup
> > const struct rte_eth_hairpin_conf *conf);
> >
> > /**
> > + * @warning
> > + * @b EXPERIMENTAL: this API may change, or be removed, without
> prior
> > notice
> > + *
> > + * Bind all hairpin TX queues of one port to the RX queues of the
> peer port.
> > + * It is only allowed to call this API after all hairpin queues
> are
> > +configured
> > + * properly and the devices of TX and peer RX are in started
> state.
> > + *
> > + * @param tx_port
> > + * The TX port identifier of the Ethernet device.
> > + * @param rx_port
> > + * The peer RX port identifier of the Ethernet device.
> > + * RTE_MAX_ETHPORTS is allowed for the traversal of all devices.
> > + * RX port ID could have the same value with TX port ID.
> > + *
> > + * @return
> > + * - (0) if successful.
> > + * - (-EINVAL) if bad parameter.
> > + * - (-EBUSY) if device is not in started state.
> > + * - (-ENOTSUP) if hardware doesn't support.
> > + * - Others detailed errors from PMD drivers.
> > + */
> > +__rte_experimental
> > +int rte_eth_hairpin_bind(uint16_t tx_port, uint16_t rx_port);
> > +
> > +/**
> > + * @warning
> > + * @b EXPERIMENTAL: this API may change, or be removed, without
> prior
> > notice
> > + *
> > + * Unbind all hairpin TX queues of one port from the RX queues of
> the
> > + peer
> > port.
> > + * This should be called before closing the TX or RX devices
> > +(optional). After
> > + * unbind the hairpin ports pair, it is allowed to bind them
> again.
> > + * Changing queues configuration should be after stopping the
> device.
> > + *
> > + * @param tx_port
> > + * The TX port identifier of the Ethernet device.
> > + * @param rx_port
> > + * The peer RX port identifier of the Ethernet device.
> > + * RTE_MAX_ETHPORTS is allowed for traversal of all devices.
> > + * RX port ID could have the same value with TX port ID.
> > + *
> > + * @return
> > + * - (0) if successful.
> > + * - (-EINVAL) if bad parameter.
> > + * - (-EBUSY) if device is in stopped state.
> > + * - (-ENOTSUP) if hardware doesn't support.
> > + * - Others detailed errors from PMD drivers.
> > + */
> > +__rte_experimental
> > +int rte_eth_hairpin_unbind(uint16_t tx_port, uint16_t rx_port);
> > +
> > +/**
> > * Return the NUMA socket to which an Ethernet device is
> connected
> > *
> > * @param port_id
> > diff --git a/lib/librte_ethdev/rte_ethdev_driver.h
> > b/lib/librte_ethdev/rte_ethdev_driver.h
> > index 04ac8e9..910433f 100644
> > --- a/lib/librte_ethdev/rte_ethdev_driver.h
> > +++ b/lib/librte_ethdev/rte_ethdev_driver.h
> > @@ -575,6 +575,54 @@ typedef int (*eth_tx_hairpin_queue_setup_t)
> > const struct rte_eth_hairpin_conf *hairpin_conf);
> >
> > /**
> > + * @internal
> > + * Bind all hairpin TX queues of one port to the RX queues of the
> peer port.
> > + *
> > + * @param dev
> > + * ethdev handle of port.
> > + * @param rx_port
> > + * the peer RX port.
> > + *
> > + * @return
> > + * Negative errno value on error, 0 on success.
> > + *
> > + * @retval 0
> > + * Success, bind successfully.
> > + * @retval -ENOTSUP
> > + * Bind API is not supported.
> > + * @retval -EINVAL
> > + * One of the parameters is invalid.
> > + * @retval -EBUSY
> > + * Device is not started.
> > + */
> > +typedef int (*eth_hairpin_bind_t)(struct rte_eth_dev *dev,
> > + uint16_t rx_port);
> > +
> > +/**
> > + * @internal
> > + * Unbind all hairpin TX queues of one port from the RX queues of
> the
> > +peer
> > port.
> > + *
> > + * @param dev
> > + * ethdev handle of port.
> > + * @param rx_port
> > + * the peer RX port.
> > + *
> > + * @return
> > + * Negative errno value on error, 0 on success.
> > + *
> > + * @retval 0
> > + * Success, bind successfully.
> > + * @retval -ENOTSUP
> > + * Bind API is not supported.
> > + * @retval -EINVAL
> > + * One of the parameters is invalid.
> > + * @retval -EBUSY
> > + * Device is already stopped.
> > + */
> > +typedef int (*eth_hairpin_unbind_t)(struct rte_eth_dev *dev,
> > + uint16_t rx_port);
> > +
> > +/**
> > * @internal A structure containing the functions exported by an
> > Ethernet driver.
> > */
> > struct eth_dev_ops {
> > @@ -713,6 +761,10 @@ struct eth_dev_ops {
> > /**< Set up device RX hairpin queue. */
> > eth_tx_hairpin_queue_setup_t tx_hairpin_queue_setup;
> > /**< Set up device TX hairpin queue. */
> > + eth_hairpin_bind_t hairpin_bind;
> > + /**< Bind all hairpin TX queues of device to the peer port RX
> queues. */
> > + eth_hairpin_unbind_t hairpin_unbind;
> > + /**< Unbind all hairpin TX queues from the peer port RX queues.
> */
> > };
> >
> > /**
> > diff --git a/lib/librte_ethdev/rte_ethdev_version.map
> > b/lib/librte_ethdev/rte_ethdev_version.map
> > index c95ef51..18efe4e 100644
> > --- a/lib/librte_ethdev/rte_ethdev_version.map
> > +++ b/lib/librte_ethdev/rte_ethdev_version.map
> > @@ -227,6 +227,8 @@ EXPERIMENTAL {
> > rte_tm_wred_profile_delete;
> >
> > # added in 20.11
> > + rte_eth_hairpin_bind;
> > + rte_eth_hairpin_unbind;
> > rte_eth_link_speed_to_str;
> > rte_eth_link_to_str;
> > };
> > --
> > 2.5.5
Thanks
next prev parent reply other threads:[~2020-10-07 11:21 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-11 4:51 [dpdk-dev] [RFC] introduce support for hairpin between two ports Bing Zhao
2020-09-13 15:48 ` [dpdk-dev] [RFC PATCH v2 0/4] " Bing Zhao
2020-09-13 15:48 ` [dpdk-dev] [RFC PATCH v2 1/4] ethdev: add support for flow item transmit queue Bing Zhao
2020-09-13 15:48 ` [dpdk-dev] [RFC PATCH v2 2/4] testpmd: add item transmit queue in flow CLI Bing Zhao
2020-09-13 15:48 ` [dpdk-dev] [RFC PATCH v2 3/4] ethdev: add hairpin bind APIs Bing Zhao
2020-09-13 15:49 ` [dpdk-dev] [RFC PATCH v2 4/4] ethdev: add new attributes to hairpin queues config Bing Zhao
2020-10-01 0:25 ` [dpdk-dev] [PATCH 0/4] introduce support for hairpin between two ports Bing Zhao
2020-10-01 0:25 ` [dpdk-dev] [PATCH 1/4] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-04 9:20 ` Ori Kam
2020-10-07 11:21 ` Bing Zhao [this message]
2020-10-07 11:42 ` Ori Kam
2020-10-01 0:26 ` [dpdk-dev] [PATCH 2/4] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-04 9:22 ` Ori Kam
2020-10-07 11:32 ` Bing Zhao
2020-10-01 0:26 ` [dpdk-dev] [PATCH 3/4] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-04 9:34 ` Ori Kam
2020-10-07 11:34 ` Bing Zhao
2020-10-01 0:26 ` [dpdk-dev] [PATCH 4/4] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-04 9:39 ` Ori Kam
2020-10-07 11:36 ` Bing Zhao
2020-10-04 9:45 ` [dpdk-dev] [PATCH 0/4] introduce support for hairpin between two ports Ori Kam
2020-10-08 8:51 ` [dpdk-dev] [PATCH v2 0/6] " Bing Zhao
2020-10-08 8:51 ` [dpdk-dev] [PATCH v2 1/6] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-08 9:07 ` Ori Kam
2020-10-08 8:51 ` [dpdk-dev] [PATCH v2 2/6] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-08 9:23 ` Ori Kam
2020-10-08 8:51 ` [dpdk-dev] [PATCH v2 3/6] ethdev: add API to get hairpin peer ports list Bing Zhao
2020-10-08 9:40 ` Ori Kam
2020-10-08 8:51 ` [dpdk-dev] [PATCH v2 4/6] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-08 9:44 ` Ori Kam
2020-10-08 8:51 ` [dpdk-dev] [PATCH v2 5/6] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-08 9:45 ` Ori Kam
2020-10-08 8:51 ` [dpdk-dev] [PATCH v2 6/6] doc: update for two ports hairpin mode Bing Zhao
2020-10-08 9:47 ` Ori Kam
2020-10-08 12:05 ` [dpdk-dev] [PATCH v3 0/6] introduce support for hairpin between two ports Bing Zhao
2020-10-08 12:05 ` [dpdk-dev] [PATCH v3 1/6] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-14 14:35 ` Thomas Monjalon
2020-10-15 2:56 ` Bing Zhao
2020-10-15 7:31 ` Thomas Monjalon
2020-10-08 12:05 ` [dpdk-dev] [PATCH v3 2/6] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-12 21:37 ` Thomas Monjalon
2020-10-13 12:29 ` Bing Zhao
2020-10-13 12:41 ` Thomas Monjalon
2020-10-13 13:21 ` Bing Zhao
2020-10-08 12:05 ` [dpdk-dev] [PATCH v3 3/6] ethdev: add API to get hairpin peer ports list Bing Zhao
2020-10-08 12:31 ` Ori Kam
2020-10-08 12:05 ` [dpdk-dev] [PATCH v3 4/6] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-08 12:05 ` [dpdk-dev] [PATCH v3 5/6] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-08 12:05 ` [dpdk-dev] [PATCH v3 6/6] doc: update for two ports hairpin mode Bing Zhao
2020-10-12 21:30 ` Thomas Monjalon
2020-10-13 1:13 ` Bing Zhao
2020-10-13 6:37 ` Thomas Monjalon
2020-10-13 6:40 ` Bing Zhao
2020-10-13 16:19 ` [dpdk-dev] [PATCH v4 0/5] introduce support for hairpin between two ports Bing Zhao
2020-10-13 16:19 ` [dpdk-dev] [PATCH v4 1/5] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-14 14:43 ` Thomas Monjalon
2020-10-15 2:59 ` Bing Zhao
2020-10-13 16:19 ` [dpdk-dev] [PATCH v4 2/5] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-13 16:19 ` [dpdk-dev] [PATCH v4 3/5] ethdev: add API to get hairpin peer ports list Bing Zhao
2020-10-14 15:02 ` Thomas Monjalon
2020-10-15 4:03 ` Bing Zhao
2020-10-13 16:19 ` [dpdk-dev] [PATCH v4 4/5] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-13 16:19 ` [dpdk-dev] [PATCH v4 5/5] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-15 5:35 ` [dpdk-dev] [PATCH v5 0/5] introduce support for hairpin between two ports Bing Zhao
2020-10-15 5:35 ` [dpdk-dev] [PATCH v5 1/5] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-15 10:34 ` Thomas Monjalon
2020-10-15 11:39 ` Bing Zhao
2020-10-15 5:35 ` [dpdk-dev] [PATCH v5 2/5] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-15 10:46 ` Thomas Monjalon
2020-10-15 13:45 ` Bing Zhao
2020-10-15 5:35 ` [dpdk-dev] [PATCH v5 3/5] ethdev: add API to get hairpin peer ports list Bing Zhao
2020-10-15 5:35 ` [dpdk-dev] [PATCH v5 4/5] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-15 5:35 ` [dpdk-dev] [PATCH v5 5/5] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-15 13:08 ` [dpdk-dev] [PATCH v6 0/5] introduce support for hairpin between two ports Bing Zhao
2020-10-15 13:08 ` [dpdk-dev] [PATCH v6 1/5] ethdev: add hairpin bind and unbind APIs Bing Zhao
2020-10-15 13:08 ` [dpdk-dev] [PATCH v6 2/5] ethdev: add new attributes to hairpin config Bing Zhao
2020-10-15 13:08 ` [dpdk-dev] [PATCH v6 3/5] ethdev: add API to get hairpin peer ports list Bing Zhao
2020-10-15 13:08 ` [dpdk-dev] [PATCH v6 4/5] ethdev: add APIs for hairpin queue operation Bing Zhao
2020-10-15 13:08 ` [dpdk-dev] [PATCH v6 5/5] app/testpmd: change hairpin queues setup Bing Zhao
2020-10-15 23:03 ` [dpdk-dev] [PATCH v6 0/5] introduce support for hairpin between two ports Ferruh Yigit
2020-10-16 1:34 ` Bing Zhao
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