From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 30452A04A3; Tue, 5 Nov 2019 13:27:36 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id A387E374E; Tue, 5 Nov 2019 13:27:35 +0100 (CET) Received: from dispatch1-us1.ppe-hosted.com (dispatch1-us1.ppe-hosted.com [67.231.154.164]) by dpdk.org (Postfix) with ESMTP id 07838374C for ; Tue, 5 Nov 2019 13:27:34 +0100 (CET) X-Virus-Scanned: Proofpoint Essentials engine Received: from webmail.solarflare.com (uk.solarflare.com [193.34.186.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mx1-us3.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTPS id A02F36C0055; Tue, 5 Nov 2019 12:27:16 +0000 (UTC) Received: from [192.168.38.17] (91.220.146.112) by ukex01.SolarFlarecom.com (10.17.10.4) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 5 Nov 2019 12:27:09 +0000 To: Ferruh Yigit , Ori Kam , "John McNamara" , Marko Kovacevic , Thomas Monjalon CC: "dev@dpdk.org" , "jingjing.wu@intel.com" , "stephen@networkplumber.org" , Jerin Jacob References: <1569479349-36962-1-git-send-email-orika@mellanox.com> <1572479604-178752-1-git-send-email-orika@mellanox.com> <1572479604-178752-3-git-send-email-orika@mellanox.com> <10616bdb-4314-833e-d05e-ab5674763ae1@intel.com> <676258d8-83e6-754c-681e-1e60099f4b31@solarflare.com> <4ec1b7f2-9896-b1e5-8a11-177b7b14eaac@intel.com> <38e339da-9900-0e7e-2686-385d77023575@solarflare.com> <14821917-596c-06b9-e5db-eaa1c1c8ffbe@intel.com> From: Andrew Rybchenko Openpgp: preference=signencrypt Autocrypt: addr=arybchenko@solarflare.com; keydata= mQINBF2681gBEACbdTxu8eLL3UX2oAelsnK9GkeaJeUYSOHPJQpV7RL/iaIskqTwBRnhjXt7 j9UEwGA+omnOmqQMpeQTb/F9Ma2dYE+Hw4/t/1KVjxr3ehFaASvwR4fWJfO4e2l/Rk4rG6Yi 5r6CWU2y8su2654Fr8KFc+cMGOAgKoZTZHZsRy5lHpMlemeF+VZkv8L5sYJWPnsypgqlCG3h 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1572956853-RmC4GEAclct8 Subject: Re: [dpdk-dev] [PATCH v7 02/14] ethdev: add support for hairpin queue 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" On 11/5/19 3:23 PM, Ferruh Yigit wrote: > On 11/5/2019 12:12 PM, Andrew Rybchenko wrote: >> On 11/5/19 3:05 PM, Ferruh Yigit wrote: >>> On 11/5/2019 11:49 AM, Andrew Rybchenko wrote: >>>> On 11/5/19 2:36 PM, Ori Kam wrote: >>>>> >>>>>> -----Original Message----- >>>>>> From: Ferruh Yigit >>>>>> Sent: Tuesday, November 5, 2019 1:25 PM >>>>>> To: Ori Kam ; John McNamara >>>>>> ; Marko Kovacevic >>>>>> ; Thomas Monjalon ; >>>>>> Andrew Rybchenko >>>>>> Cc: dev@dpdk.org; jingjing.wu@intel.com; stephen@networkplumber.org; Jerin >>>>>> Jacob >>>>>> Subject: Re: [PATCH v7 02/14] ethdev: add support for hairpin queue >>>>>> >>>>>> On 10/30/2019 11:53 PM, Ori Kam wrote: >>>>>>> This commit introduce hairpin queue type. >>>>>>> >>>>>>> The hairpin queue in build from Rx queue binded to Tx queue. >>>>>>> It is used to offload traffic coming from the wire and redirect it back >>>>>>> to the wire. >>>>>>> >>>>>>> There are 3 new functions: >>>>>>> - rte_eth_dev_hairpin_capability_get >>>>>>> - rte_eth_rx_hairpin_queue_setup >>>>>>> - rte_eth_tx_hairpin_queue_setup >>>>>>> >>>>>>> In order to use the queue, there is a need to create rte_flow >>>>>>> with queue / RSS action that targets one or more of the Rx queues. >>>>>>> >>>>>>> Signed-off-by: Ori Kam >>>>>>> Reviewed-by: Andrew Rybchenko >>>>>> <...> >>>>>> >>>>>>> #include >>>>>>> >>>>>>> /** >>>>>>> + * @internal >>>>>>> + * Check if the selected Rx queue is hairpin queue. >>>>>>> + * >>>>>>> + * @param dev >>>>>>> + * Pointer to the selected device. >>>>>>> + * @param queue_id >>>>>>> + * The selected queue. >>>>>>> + * >>>>>>> + * @return >>>>>>> + * - (1) if the queue is hairpin queue, 0 otherwise. >>>>>>> + */ >>>>>>> +int >>>>>>> +rte_eth_dev_is_rx_hairpin_queue(struct rte_eth_dev *dev, uint16_t >>>>>> queue_id); >>>>>>> + >>>>>>> +/** >>>>>>> + * @internal >>>>>>> + * Check if the selected Tx queue is hairpin queue. >>>>>>> + * >>>>>>> + * @param dev >>>>>>> + * Pointer to the selected device. >>>>>>> + * @param queue_id >>>>>>> + * The selected queue. >>>>>>> + * >>>>>>> + * @return >>>>>>> + * - (1) if the queue is hairpin queue, 0 otherwise. >>>>>>> + */ >>>>>>> +int >>>>>>> +rte_eth_dev_is_tx_hairpin_queue(struct rte_eth_dev *dev, uint16_t >>>>>> queue_id); >>>>>>> + >>>>>>> +/** >>>>>> If these functions are internal why there are in 'rte_ethdev.h' ? >>>>>> >>>>>>> * >>>>>>> * Retrieve a burst of input packets from a receive queue of an Ethernet >>>>>>> * device. The retrieved packets are stored in *rte_mbuf* structures whose >>>>>>> @@ -4251,6 +4400,11 @@ int rte_eth_dev_adjust_nb_rx_tx_desc(uint16_t >>>>>> port_id, >>>>>>> RTE_ETHDEV_LOG(ERR, "Invalid RX queue_id=%u\n", >>>>>> queue_id); >>>>>>> return 0; >>>>>>> } >>>>>>> + if (rte_eth_dev_is_rx_hairpin_queue(dev, queue_id)) { >>>>>>> + RTE_ETHDEV_LOG(ERR, "Rx burst failed, queue_id=%u is >>>>>> hairpin queue\n", >>>>>>> + queue_id); >>>>>>> + return 0; >>>>>>> + } >>>>>>> #endif >>>>>>> nb_rx = (*dev->rx_pkt_burst)(dev->data->rx_queues[queue_id], >>>>>>> rx_pkts, nb_pkts); >>>>>>> @@ -4517,6 +4671,11 @@ static inline int >>>>>> rte_eth_tx_descriptor_status(uint16_t port_id, >>>>>>> RTE_ETHDEV_LOG(ERR, "Invalid TX queue_id=%u\n", >>>>>> queue_id); >>>>>>> return 0; >>>>>>> } >>>>>>> + if (rte_eth_dev_is_tx_hairpin_queue(dev, queue_id)) { >>>>>>> + RTE_ETHDEV_LOG(ERR, "Tx burst failed, queue_id=%u is >>>>>> hairpin queue\n", >>>>>>> + queue_id); >>>>>>> + return 0; >>>>>>> + } >>>>>>> #endif >>>>>> Hi Ori, >>>>>> >>>>>> These are causing build error, thanks Jerin for catching, because they are >>>>>> internal and called by a public static inline API, so whoever calls >>>>>> 'rte_eth_rx/tx_burst()' APIs in the shared build, can't find >>>>>> 'rte_eth_dev_is_rx/tx_hairpin_queue()' functions [1], >>>>>> >>>>>> as far as I can see there are two options: >>>>>> 1) Remove these checks >>>>>> 2) Make 'rte_eth_dev_is_rx/tx_hairpin_queue()' public API instead of internal >>>>>> >>>>>> If there is a value to make 'rte_eth_dev_is_rx/tx_hairpin_queue()' public API >>>>>> we >>>>>> should go with (2) else (1). >>>>>> >>>>> I think we can skip the tests, >>>>> But it was Andrew request so we must get is response. >>>>> It was also his empathies that they should be internal. >>>> It is important for me to keep rte_eth_dev_state internal and >>>> few patches ago rte_eth_dev_is_rx_hairpin_queue() was inline. >>> Are you saying you don't want to option to make >>> 'rte_eth_dev_is_rx_hairpin_queue()' static inline because it will force the >>> 'RTE_ETH_QUEUE_STATE_xxx' being public? >> Yes. > +1 > >>>> I'm OK to make the function experimental or keep it internal >>>> (no API/ABI stability requirements) but externally visible (in .map). >>> I think we can't do this, add a function deceleration to the public header file >>> and add it to the .map file but keep it internal. Instead we can make it a >>> proper API and it should be experimental at least first release. >> We have discussed similar thing with Olivier recently [1]. >> >> [1] http://inbox.dpdk.org/dev/20191030142938.bpi4txlrebqfq7uw@platinum/ > Yes we can say they are internal but there won't be anything preventing > applications to use them. That's true, but making it internal says - don't use it. Anyway, I have no strong opinion on experimental vs internal. >>> The question above was do we need this API, or instead should remove the check >>> from rx/tx_burst APIs? >> I think these checks are useful to ensure that these functions >> are not used for hairpin queues. At least to catch it with debug >> enabled. > OK, if so what not make them proper API? Any concern on it? > >>>>>> [1] >>>>>> /usr/bin/ld: rte_event_eth_rx_adapter.o: in function `rxa_eth_rx': >>>>>> rte_event_eth_rx_adapter.c:(.text+0x1728): undefined reference to >>>>>> `rte_eth_dev_is_rx_hairpin_queue' >>>>>> /usr/bin/ld: rte_event_eth_rx_adapter.o: in function `rxa_service_func': >>>>>> rte_event_eth_rx_adapter.c:(.text+0x22ab): undefined reference to >>>>>> `rte_eth_dev_is_rx_hairpin_queue' >>>>>> /usr/bin/ld: rte_event_eth_tx_adapter.o: in function `txa_service_buffer_retry': >>>>>> rte_event_eth_tx_adapter.c:(.text+0xa43): undefined reference to >>>>>> `rte_eth_dev_is_tx_hairpin_queue' >>>>>> /usr/bin/ld: rte_event_eth_tx_adapter.o: in function `txa_service_func': >>>>>> rte_event_eth_tx_adapter.c:(.text+0xe7d): undefined reference to >>>>>> `rte_eth_dev_is_tx_hairpin_queue' >>>>>> /usr/bin/ld: rte_event_eth_tx_adapter.c:(.text+0x1155): undefined reference to >>>>>> `rte_eth_dev_is_tx_hairpin_queue' >>>>>> collect2: error: ld returned 1 exit status