From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 8B95AA0544; Mon, 30 May 2022 21:43:18 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 6E56C400EF; Mon, 30 May 2022 21:43:18 +0200 (CEST) Received: from mail-io1-f44.google.com (mail-io1-f44.google.com [209.85.166.44]) by mails.dpdk.org (Postfix) with ESMTP id 2ADAE400D6 for ; Mon, 30 May 2022 21:43:17 +0200 (CEST) Received: by mail-io1-f44.google.com with SMTP id s23so12159769iog.13 for ; Mon, 30 May 2022 12:43:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=qD8joxit6U3HZKH5nssXZ3rrj2ZDvsQf6mX4pIOOolc=; b=QsV/oeiI8uMNqXPSmqh2iMk+2/lwveTuudyNg3XIxtIFs1GaUYAiSbbyxsVtHy17qM /V4YtZmcZVGbTENwlWkRoINsZMjy+LsfNQffrZdV8b9BQeBnMBC6S2r311URLXE4g/RP OuHTvtku6RS9peYAcSN7db48jh9eGlb17FxIU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=qD8joxit6U3HZKH5nssXZ3rrj2ZDvsQf6mX4pIOOolc=; b=Jdmwk8CJfUnbjzaZ+YDtzLfSna5e5K3vezsA0RZZOP6UDmQtiSuUNN7Tzre7o639Ml IpYgWWQH6eiyF1GG/XXQkMoHXL9rf80QPXkJvsYzywFDI+ojQJzJ9I/pDYqisAVzPqDX Z3KEzpv1Be0SiIgCG5D+iORJMK6NoaaVqJPX23v49pfK96lqT94ZbuqETVL4q/V2wDa7 wbpfZZXdVIykhEArEMwP+LyV+cdffI33BzznpqePjHaoNpdNpkDDn62bvqnzO1x8AOT5 vqNSXajANxaPGg3sM1OKzrv5hyomPb16cIin3163ec27wxy5Fk+B4Z76lFlvEqXlLysr QSAg== X-Gm-Message-State: AOAM533N3sUlaYzW/pawEc+fGbTzJ5jQUMh7e+Wak+qLHDV7ZN9npnA7 mqsktxAo/8+s7rON/Ope+wcDFvFErCKu3lmKXBd9TQ== X-Google-Smtp-Source: ABdhPJymSWN+G5e8pj8PVp6XvcJ1JRvWNFGHOPqNPpp/S7aDX2O8tX/mrvBPWN0n90HsqsMgSWoLwS/LL83g3sVOsqk= X-Received: by 2002:a05:6602:29ca:b0:649:558a:f003 with SMTP id z10-20020a05660229ca00b00649558af003mr25901241ioq.160.1653939796267; Mon, 30 May 2022 12:43:16 -0700 (PDT) MIME-Version: 1.0 References: <20220530131526.3598658-1-jerinj@marvell.com> In-Reply-To: <20220530131526.3598658-1-jerinj@marvell.com> From: Ajit Khaparde Date: Mon, 30 May 2022 12:43:00 -0700 Message-ID: Subject: Re: [dpdk-dev] [RFC PATCH] ethdev: support congestion management To: Jerin Jacob Kollanukkaran Cc: dpdk-dev , Ferruh Yigit , Thomas Monjalon , Andrew Rybchenko , Andrew Boyer , Beilei Xing , Bruce Richardson , Chas Williams , "Xia, Chenbo" , Ciara Loftus , Devendra Singh Rawat , Ed Czeck , Evgeny Schemeilin , Gaetan Rivet , Gagandeep Singh , Guoyang Zhou , Haiyue Wang , Harman Kalra , Heinrich Kuhn , Hemant Agrawal , Hyong Youb Kim , Igor Chauskin , Igor Russkikh , Jakub Grajciar , "Singh, Jasvinder" , Jian Wang , Jiawen Wu , Jingjing Wu , John Daley , John Miller , "John W. Linville" , "Wiles, Keith" , Kiran Kumar K , oulijun , Liron Himi , Long Li , Marcin Wojtas , Martin Spinler , Matan Azrad , Matt Peters , Maxime Coquelin , Michal Krawczyk , "Min Hu (Connor)" , Nalla Pradeep , Nithin Dabilpuram , Qiming Yang , Qi Zhang , Radha Mohan Chintakuntla , Rahul Lakkireddy , Rasesh Mody , Rosen Xu , "Sachin Saxena (OSS)" , Satha Rao , Shahed Shaikh , Shai Brandes , Shepard Siegel , Somalapuram Amaranath , Somnath Kotur , Stephen Hemminger , Steven Webster , Sunil Kumar Kori , Tetsuya Mukawa , Veerasenareddy Burru , Slava Ovsiienko , Xiao Wang , Xiaoyun Wang , Yisen Zhuang , Yong Wang , Ziyang Xuan , "Dumitrescu, Cristian" Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000000fec4b05e03fde2e" X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org --0000000000000fec4b05e03fde2e Content-Type: text/plain; charset="UTF-8" On Mon, May 30, 2022 at 6:16 AM wrote: > > From: Jerin Jacob > > NIC HW controllers often come with congestion management support on > various HW objects such as Rx queue depth or mempool queue depth. > > Also, it can support various modes of operation such as RED > (Random early discard), WRED etc on those HW objects. > > This patch adds a framework to express such modes(enum rte_cman_mode) > and introduce (enum rte_eth_cman_obj) to enumerate the different > objects where the modes can operate on. > > This patch adds RTE_CMAN_RED mode of operation and > RTE_ETH_CMAN_OBJ_RX_QUEUE, RTE_ETH_CMAN_OBJ_RX_QUEUE_MEMPOOL object. > > Introduced reserved fields in configuration structure > backed by rte_eth_cman_config_init() to add new configuration > parameters without ABI breakage. > > Added rte_eth_cman_info_get() API to get the information such as > supported modes and objects. > > Added rte_eth_cman_config_init(), rte_eth_cman_config_set() APIs > to configure congestion management on those object with associated mode. > > Finally, Added rte_eth_cman_config_get() API to retrieve the > applied configuration. Can you also add How all this helps an application? Thanks > > > Signed-off-by: Jerin Jacob > --- > doc/guides/nics/features.rst | 12 +++ > doc/guides/nics/features/default.ini | 1 + > lib/eal/include/meson.build | 1 + > lib/eal/include/rte_cman.h | 51 ++++++++++ > lib/ethdev/rte_ethdev.h | 145 +++++++++++++++++++++++++++ > 5 files changed, 210 insertions(+) > create mode 100644 lib/eal/include/rte_cman.h > > diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst > index 21bedb743f..ffcc2bcc92 100644 > --- a/doc/guides/nics/features.rst > +++ b/doc/guides/nics/features.rst > @@ -727,6 +727,18 @@ Supports configuring per-queue stat counter mapping. > ``rte_eth_dev_set_tx_queue_stats_mapping()``. > > > +.. _nic_features_congestion_management > + > +Congestion management > +--------------------- > + > +Supports congestion management. > + > +* **[implements] eth_dev_ops**: ``cman_info_get``, ``cman_config_set``, ``cman_config_get``. > +* **[related] API**: ``rte_eth_cman_info_get()``, ``rte_eth_cman_config_init()``, > + ``rte_eth_cman_config_set()``, ``rte_eth_cman_config_get()``. > + > + > .. _nic_features_fw_version: > > FW version > diff --git a/doc/guides/nics/features/default.ini b/doc/guides/nics/features/default.ini > index b1d18ac62c..060497e41f 100644 > --- a/doc/guides/nics/features/default.ini > +++ b/doc/guides/nics/features/default.ini > @@ -60,6 +60,7 @@ Tx descriptor status = > Basic stats = > Extended stats = > Stats per queue = > +Congestion management = > FW version = > EEPROM dump = > Module EEPROM dump = > diff --git a/lib/eal/include/meson.build b/lib/eal/include/meson.build > index 9700494816..40e31e0e6d 100644 > --- a/lib/eal/include/meson.build > +++ b/lib/eal/include/meson.build > @@ -10,6 +10,7 @@ headers += files( > 'rte_branch_prediction.h', > 'rte_bus.h', > 'rte_class.h', > + 'rte_cman.h', > 'rte_common.h', > 'rte_compat.h', > 'rte_debug.h', > diff --git a/lib/eal/include/rte_cman.h b/lib/eal/include/rte_cman.h > new file mode 100644 > index 0000000000..e6dad2ebf7 > --- /dev/null > +++ b/lib/eal/include/rte_cman.h > @@ -0,0 +1,51 @@ > +/* SPDX-License-Identifier: BSD-3-Clause > + * Copyright(C) 2022 Marvell International Ltd. > + */ > + > +#ifndef RTE_CMAN_H > +#define RTE_CMAN_H > + > +#ifdef __cplusplus > +extern "C" { > +#endif > + > +#include > + > +/** > + * @file > + * Congestion management related parameters for DPDK. > + */ > + > +/** Congestion management modes */ > +enum rte_cman_mode { > + /** Congestion based on Random Early Detection. > + * > + * https://en.wikipedia.org/wiki/Random_early_detection > + * @see struct rte_cman_red_params > + */ > + RTE_CMAN_RED = RTE_BIT64(0), > +}; > + > +/** > + * RED based congestion management configuration parameters. > + */ > +struct rte_cman_red_params { > + /**< Minimum threshold (min_th) value > + * > + * Value expressed as percentage. Value must be in 0 to 100(inclusive). > + */ > + uint8_t min_th; > + /**< Maximum threshold (max_th) value > + * > + * Value expressed as percentage. Value must be in 0 to 100(inclusive). > + */ > + uint8_t max_th; > + /** Inverse of packet marking probability maximum value (maxp = 1 / maxp_inv) */ > + uint16_t maxp_inv; > +}; > + > +#ifdef __cplusplus > +} > +#endif > + > +#endif /* RTE_CMAN_H */ > diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h > index 04cff8ee10..7c8718bb2e 100644 > --- a/lib/ethdev/rte_ethdev.h > +++ b/lib/ethdev/rte_ethdev.h > @@ -160,6 +160,7 @@ extern "C" { > #define RTE_ETHDEV_DEBUG_TX > #endif > > +#include > #include > #include > #include > @@ -5452,6 +5453,150 @@ typedef struct { > __rte_experimental > int rte_eth_dev_priv_dump(uint16_t port_id, FILE *file); > > +/* Congestion management */ > + > +/** Enumerate list of ethdev congestion management objects */ > +enum rte_eth_cman_obj { > + /** Congestion management based on Rx queue depth */ > + RTE_ETH_CMAN_OBJ_RX_QUEUE = RTE_BIT64(0), > + /** Congestion management based on mempool depth associated with Rx queue > + * @see rte_eth_rx_queue_setup() > + */ > + RTE_ETH_CMAN_OBJ_RX_QUEUE_MEMPOOL = RTE_BIT64(1), > +}; > + > +/** > + * @warning > + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice > + * > + * A structure used to retrieve information of ethdev congestion management. > + */ > +struct rte_eth_cman_info { > + /** Set of supported congestion management modes > + * @see enum rte_cman_mode > + */ > + uint64_t modes_supported; > + /** Set of supported congestion management objects > + * @see enum rte_eth_cman_obj > + */ > + uint64_t objs_supported; > + /** Reserved for future fields */ > + uint8_t rsvd[64]; > +}; > + > +/** > + * @warning > + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice > + * > + * A structure used to configure the ethdev congestion management. > + */ > +struct rte_eth_cman_config { > + /** Congestion management object */ > + enum rte_eth_cman_obj obj; > + /** Congestion management mode */ > + enum rte_cman_mode mode; > + union { > + /** Rx queue to configure congestion management. > + * > + * Valid when object is RTE_ETH_CMAN_OBJ_RX_QUEUE or > + * RTE_ETH_CMAN_OBJ_RX_QUEUE_MEMPOOL. > + */ > + uint16_t rx_queue; > + /** Reserved for future fields */ > + uint8_t rsvd_obj_params[16]; > + } obj_param; > + union { > + /** RED configuration parameters. > + * > + * Valid when mode is RTE_CMAN_RED. > + */ > + struct rte_cman_red_params red; > + /** Reserved for future fields */ > + uint8_t rsvd_mode_params[64]; > + } mode_param; > +}; > + > +/** > + * @warning > + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice > + * > + * Retrieve the information for ethdev congestion management > + * > + * @param port_id > + * The port identifier of the Ethernet device. > + * @param info > + * A pointer to a structure of type *rte_eth_cman_info* to be filled with > + * the information about congestion management. > + * @return > + * - (0) if successful. > + * - (-ENOTSUP) if support for cman_info_get does not exist. > + * - (-ENODEV) if *port_id* invalid. > + * - (-EINVAL) if bad parameter. > + */ > +__rte_experimental > +int rte_eth_cman_info_get(uint16_t port_id, struct rte_eth_cman_info *info); > + > +/** > + * @warning > + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice > + * > + * Initialize the ethdev congestion management configuration structure with default values. > + * > + * @param port_id > + * The port identifier of the Ethernet device. > + * @param config > + * A pointer to a structure of type *rte_eth_cman_config* to be initialized > + * with default value. > + * @return > + * - (0) if successful. > + * - (-ENODEV) if *port_id* invalid. > + * - (-EINVAL) if bad parameter. > + */ > +__rte_experimental > +int rte_eth_cman_config_init(uint16_t port_id, struct rte_eth_cman_config *config); > + > +/** > + * @warning > + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice > + * > + * Configure ethdev congestion management > + * > + * @param port_id > + * The port identifier of the Ethernet device. > + * @param config > + * A pointer to a structure of type *rte_eth_cman_config* to be configured. > + * @return > + * - (0) if successful. > + * - (-ENOTSUP) if support for cman_config_set does not exist. > + * - (-ENODEV) if *port_id* invalid. > + * - (-EINVAL) if bad parameter. > + */ > +__rte_experimental > +int rte_eth_cman_config_set(uint16_t port_id, struct rte_eth_cman_config *config); > + > +/** > + * @warning > + * @b EXPERIMENTAL: this API may change, or be removed, without prior notice > + * > + * Retrieve the applied ethdev congestion management parameters for the given port. > + * > + * @param port_id > + * The port identifier of the Ethernet device. > + * @param config > + * A pointer to a structure of type *rte_eth_cman_config* to retrieve > + * congestion management parameters for the given object. > + * Application must fill all parameters except mode_param parameter in > + * struct rte_eth_cman_config. > + * > + * @return > + * - (0) if successful. > + * - (-ENOTSUP) if support for cman_config_get does not exist. > + * - (-ENODEV) if *port_id* invalid. > + * - (-EINVAL) if bad parameter. > + */ > +__rte_experimental > +int rte_eth_cman_config_get(uint16_t port_id, struct rte_eth_cman_config *config); > + > #include > > /** > -- > 2.36.1 > --0000000000000fec4b05e03fde2e Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQdgYJKoZIhvcNAQcCoIIQZzCCEGMCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3NMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS 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