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mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none Received: from MN2PR12MB4286.namprd12.prod.outlook.com (2603:10b6:208:199::22) by MN2PR12MB4637.namprd12.prod.outlook.com (2603:10b6:208:3e::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3433.37; Sun, 4 Oct 2020 09:20:10 +0000 Received: from MN2PR12MB4286.namprd12.prod.outlook.com ([fe80::61fd:a36e:cf4f:2d3f]) by MN2PR12MB4286.namprd12.prod.outlook.com ([fe80::61fd:a36e:cf4f:2d3f%8]) with mapi id 15.20.3433.042; Sun, 4 Oct 2020 09:20:10 +0000 From: Ori Kam To: Bing Zhao , NBU-Contact-Thomas Monjalon , "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" Thread-Topic: [PATCH 1/4] ethdev: add hairpin bind and unbind APIs Thread-Index: AQHWl4mIK5rf2s6GGEWFCIE+TKZNUKmHI/vA Date: Sun, 4 Oct 2020 09:20:10 +0000 Message-ID: References: <1600012140-70151-1-git-send-email-bingz@nvidia.com> <1601511962-21532-1-git-send-email-bingz@nvidia.com> <1601511962-21532-2-git-send-email-bingz@nvidia.com> In-Reply-To: <1601511962-21532-2-git-send-email-bingz@nvidia.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: nvidia.com; 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b=YUX/87n7mlpGY4VqSTDilFK30HqPoKltpT1iS7Yu0UYX+6u7HblA+7M7aQPeQbB8j uxylI8acCX0JTTv9HxWCCMZNOrLlgt6bsvP97Cd2kMFLLUIDq7akBWMVISsO7ixPoq ak53JlD+z34lJwqQz77czy/FpyErjk0mCik36ocBfVq8WQfg1hdJ+Y/2GedSFz5H4h YBt56e02awyDsuYDjs1WDQvdw7lbKot/U8myTKSPeNpwRYZiz5/mJPbgmZv0TrOK6S 7lD4XyFwS1J1bqbAifgeDbyssep9Gdugl9OyusT1RNp8ARattnnQGAQrlIS3Y8Q8KU UFOaMXEzBXzFw== Subject: Re: [dpdk-dev] [PATCH 1/4] ethdev: add hairpin bind and unbind APIs X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Archived-At: List-Archive: Hi Bing, PSB, Thanks, Ori > -----Original Message----- > From: Bing Zhao > Sent: Thursday, October 1, 2020 3:26 AM > Cc: dev@dpdk.org > Subject: [PATCH 1/4] ethdev: add hairpin bind and unbind APIs >=20 > 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. >=20 > 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. >=20 > 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. >=20 > 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. >=20 > Signed-off-by: Bing Zhao > --- > 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(+) >=20 > diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethde= v.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); > } >=20 > +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 =3D 0; > + > + RTE_ETH_VALID_PORTID_OR_ERR_RET(tx_port, -EINVAL); > + dev =3D &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.=20 > + if (rx_port =3D=3D 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? So either add a new function to get all peer ports from the tx port, or mov= e this logic to the=20 Target PMD. > + RTE_ETH_FOREACH_DEV(p) { > + rdev =3D &rte_eth_devices[p]; > + if (!rdev->data->dev_started) { > + RTE_ETHDEV_LOG(ERR, > + "RX port %d is not started", p); > + ret =3D -EBUSY; > + goto unbind; > + } > + ret =3D (*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 =3D &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 =3D (*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 =3D 0; > + > + RTE_ETH_VALID_PORTID_OR_ERR_RET(tx_port, -EINVAL); > + dev =3D &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 =3D=3D RTE_MAX_ETHPORTS) { > + RTE_ETH_FOREACH_DEV(p) { > + rdev =3D &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 fa= il to stop if it is bounded. > + RTE_ETHDEV_LOG(ERR, "RX port %d is > stopped", p); > + ret =3D -EBUSY; > + break; > + } > + ret =3D (*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 =3D &rte_eth_devices[rx_port]; > + if (!rdev->data->dev_started) { > + RTE_ETHDEV_LOG(ERR, "RX port %d is stopped", > rx_port); > + return -EBUSY; > + } > + ret =3D (*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_ethde= v.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); >=20 > /** > + * @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 p= ort. > + * It is only allowed to call this API after all hairpin queues are conf= igured > + * 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 pe= er > 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); >=20 > /** > + * @internal > + * Bind all hairpin TX queues of one port to the RX queues of the peer p= ort. > + * > + * @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 pe= er > 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 Etherne= t > 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. */ > }; >=20 > /** > 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; >=20 > # 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