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 8FAD4A04C0; Tue, 29 Sep 2020 12:39:42 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id D42701D6BF; Tue, 29 Sep 2020 12:39:39 +0200 (CEST) Received: from dispatch1-us1.ppe-hosted.com (dispatch1-us1.ppe-hosted.com [67.231.154.164]) by dpdk.org (Postfix) with ESMTP id 465BE1BCBF for ; Tue, 29 Sep 2020 12:39:37 +0200 (CEST) Received: from mx1-us1.ppe-hosted.com (unknown [10.110.50.143]) by dispatch1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTP id CF5372004E; Tue, 29 Sep 2020 10:39:35 +0000 (UTC) Received: from us4-mdac16-25.at1.mdlocal (unknown [10.110.49.207]) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTP id CB92C800A4; Tue, 29 Sep 2020 10:39:35 +0000 (UTC) X-Virus-Scanned: Proofpoint Essentials engine Received: from mx1-us1.ppe-hosted.com (unknown [10.110.49.106]) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTPS id 4FF494006C; Tue, 29 Sep 2020 10:39:35 +0000 (UTC) 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-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTPS id 1DAE6B40066; Tue, 29 Sep 2020 10:39:34 +0000 (UTC) Received: from [192.168.38.17] (10.17.10.39) by ukex01.SolarFlarecom.com (10.17.10.4) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 29 Sep 2020 11:39:04 +0100 To: Thomas Monjalon , CC: , Shijith Thotton , Srisivasubramanian Srinivasan , Heinrich Kuhn , Alfredo Cardigliano , Liron Himi , Ray Kinsella , Neil Horman , "John W. Linville" , "Ciara Loftus" , Qi Zhang , "Shepard Siegel" , Ed Czeck , John Miller , Igor Russkikh , Pavel Belous , Steven Webster , Matt Peters , Somalapuram Amaranath , "Rasesh Mody" , Shahed Shaikh , Ajit Khaparde , Somnath Kotur , Chas Williams , "Wei Hu (Xavier)" , Rahul Lakkireddy , Hemant Agrawal , Sachin Saxena , Jeff Guo , Haiyue Wang , Marcin Wojtas , Michal Krawczyk , Guy Tzalik , Evgeny Schemeilin , Igor Chauskin , Gagandeep Singh , John Daley , Hyong Youb Kim , Gaetan Rivet , Xiao Wang , Ziyang Xuan , Xiaoyun Wang , Guoyang Zhou , "Min Hu (Connor)" , Yisen Zhuang , Beilei Xing , Jingjing Wu , Qiming Yang , Jakub Grajciar , Matan Azrad , Shahaf Shuler , Viacheslav Ovsiienko , Zyta Szpak , Stephen Hemminger , "K. Y. Srinivasan" , "Haiyang Zhang" , Long Li , "Martin Spinler" , Tetsuya Mukawa , "Harman Kalra" , Jerin Jacob , "Nithin Dabilpuram" , Kiran Kumar K , Akhil Goyal , "Bruce Richardson" , Jasvinder Singh , Cristian Dumitrescu , Keith Wiles , "Maxime Coquelin" , Chenbo Xia , Zhihong Wang , Yong Wang References: <20200913220711.3768597-1-thomas@monjalon.net> <20200928231437.414489-1-thomas@monjalon.net> <20200928231437.414489-22-thomas@monjalon.net> From: Andrew Rybchenko Autocrypt: addr=arybchenko@solarflare.com; keydata= mQINBF2681gBEACbdTxu8eLL3UX2oAelsnK9GkeaJeUYSOHPJQpV7RL/iaIskqTwBRnhjXt7 j9UEwGA+omnOmqQMpeQTb/F9Ma2dYE+Hw4/t/1KVjxr3ehFaASvwR4fWJfO4e2l/Rk4rG6Yi 5r6CWU2y8su2654Fr8KFc+cMGOAgKoZTZHZsRy5lHpMlemeF+VZkv8L5sYJWPnsypgqlCG3h v6lbtfZs+QqYbFH6bqoZwBAl5irmxywGR7ZJr1GLUZZ1lfdazSY8r6Vz0/Ip/KVxGu2uxo81 QCsAj0ZsQtwji9Sds/prTiPrIjx8Fc/tfbnAuVuPcnPbczwCJACzQr4q26XATL3kVuZhSBWh 4XfO/EAUuEq5AemUG5DDTM87g7Lp4eT9gMZB6P+rJwWPNWTiV3L7Cn+fO+l9mTPnOqdzBgDe 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S0PkBvFD2+0zr5Bc2YkMGPBYPNGZiTp3UjmZlLfn3TiBKIC92jherY563CULjSsiBEJCOSvv 4VPLn5aAcfbCXJnE3IGCp/hPl50iQqu7BPOYBbWXeb9ptDjGCAThNxSz0WAXkmcjAFE8gdE6 Znk9 Message-ID: Date: Tue, 29 Sep 2020 13:38:51 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <20200928231437.414489-22-thomas@monjalon.net> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.17.10.39] X-ClientProxiedBy: ocex03.SolarFlarecom.com (10.20.40.36) To ukex01.SolarFlarecom.com (10.17.10.4) X-TM-AS-Product-Ver: SMEX-12.5.0.1300-8.6.1012-25674.003 X-TM-AS-Result: No-13.027000-8.000000-10 X-TMASE-MatchedRID: X4bcv0S75KnmLzc6AOD8DfHkpkyUphL9yiCNl30ibNkc/7Erk///Mor7 GzPHv3SHkfldkme/38K8wl+jvj0E1bT0jVEXWzBwnMQdNQ64xfecqlCdrhyhQOjnKWtZ9LTLLfn mne610dPyESWpE+X3nL7hMTwFP/LZSs5dDi8K1liKYdYQLbymTRNxIBdPjFbgy5JfHvVu9IsBSr A72lIhPRxTd/aq2eqhUnS+W1JGqpeIrqGRsg8wJl2wRgrVU2VprGZw1RBo58FPvOpmjDN2khxSc gjK3TZJBCNzEQm4VRjxJvAJyBimeiOx1NdxmIgoIQrubkFPQdmMeFePU0tuMGfihW8hWemQHxpG EqCU+3wS6XSAtMb+LvyvVC5KVkj55UcZtwNsCro5f9Xw/xqKXVkMvWAuahr8+gD2vYtOFhgqtq5 d3cxkNdcOPVDgA8uFhZegLKlEqblog90zZl9feCUoUe25pddQzZyzQ98MNRs= X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--13.027000-8.000000 X-TMASE-Version: SMEX-12.5.0.1300-8.6.1012-25674.003 X-MDID: 1601375975-RsH9VchourRw Subject: Re: [dpdk-dev] [PATCH v3 21/29] ethdev: remove old close behaviour 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 9/29/20 2:14 AM, Thomas Monjalon wrote: > The temporary flag RTE_ETH_DEV_CLOSE_REMOVE is removed. > It was introduced in DPDK 18.11 in order to give time for PMDs to migrate. > > The old behaviour was to free only queues when closing a port. > The new behaviour is calling rte_eth_dev_release_port() which does > three more tasks: > - trigger event callback > - reset state and few pointers > - free all generic port resources > > The private port resources must be released in the .dev_close callback. > > The .remove callback should: > - call .dev_close callback > - call rte_eth_dev_release_port() > - free multi-port device shared resources > > Despite waiting two years, some drivers have not migrated, > so they may hit issues with the incompatible new behaviour. > After sending emails, adding logs, and announcing the deprecation, > the only last solution is to declare these drivers as unmaintained: > ionic, liquidio, nfp > Below is a summary of what to implement in those drivers. > > * The freeing of private port resources must be moved > from the ".remove(device)" function to the ".dev_close(port)" function. > > * If a generic resource (.mac_addrs or .hash_mac_addrs) cannot be freed, > it must be set to NULL in ".dev_close" function to protect from > subsequent rte_eth_dev_release_port() freeing. > > * Note 1: > The generic resources are freed in rte_eth_dev_release_port(), > after ".dev_close" is called in rte_eth_dev_close(), but not when > calling ".dev_close" directly from the ".remove" PMD function. > That's why rte_eth_dev_release_port() must still be called explicitly > from ".remove(device)" after calling the ".dev_close" PMD function. > > * Note 2: > If a device can have multiple ports, the common resources must be freed > only in the ".remove(device)" function. > > * Note 3: > The port is supposed to be in a stopped state when it is closed. > If it is not the case, it is free to the PMD implementation > how to react when trying to close a non-stopped port: > either try to stop it automatically or just return an error. > > Cc: Shijith Thotton > Cc: Srisivasubramanian Srinivasan > Cc: Heinrich Kuhn > Cc: Alfredo Cardigliano > > Signed-off-by: Thomas Monjalon > Reviewed-by: Liron Himi Acked-by: Andrew Rybchenko