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Wed, 8 Jul 2020 09:27:35 +0000 Received: from AM0PR05MB4401.eurprd05.prod.outlook.com ([fe80::50d8:317c:f079:9c86]) by AM0PR05MB4401.eurprd05.prod.outlook.com ([fe80::50d8:317c:f079:9c86%6]) with mapi id 15.20.3174.020; Wed, 8 Jul 2020 09:27:35 +0000 From: Ali Alnubani To: Slava Ovsiienko , "stable@dpdk.org" CC: "ktraynor@redhat.com" , Yongseok Koh Thread-Topic: [dpdk-stable] [PATCH v2 2/3] [18.11] net/mlx5: remove device register remap Thread-Index: AQHWVC4N9YQYMgjCOUaRPEG8sKC4i6j9a4MQ Date: Wed, 8 Jul 2020 09:27:35 +0000 Message-ID: References: <1594105971-14738-1-git-send-email-viacheslavo@mellanox.com> <1594105971-14738-2-git-send-email-viacheslavo@mellanox.com> In-Reply-To: <1594105971-14738-2-git-send-email-viacheslavo@mellanox.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: mellanox.com; dkim=none (message not signed) header.d=none;mellanox.com; dmarc=none action=none header.from=mellanox.com; x-originating-ip: [37.76.205.241] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: d0c25ee3-4573-4f66-5815-08d823212633 x-ms-traffictypediagnostic: AM4PR05MB3267: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:5236; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Mellanox.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: AM0PR05MB4401.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: d0c25ee3-4573-4f66-5815-08d823212633 X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Jul 2020 09:27:35.4007 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a652971c-7d2e-4d9b-a6a4-d149256f461b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 8/Knh+wB6YYvS/PilyAFBPgV+jd7KX0F6+LQ9qIMgTjTz8S9ZVpjGpGVS2oWwKu2IDISuukQ2QHvprybu4QY0Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM4PR05MB3267 Subject: Re: [dpdk-stable] [PATCH v2 2/3] [18.11] net/mlx5: remove device register remap X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" > -----Original Message----- > From: stable On Behalf Of Viacheslav Ovsiienko > Sent: Tuesday, July 7, 2020 10:13 AM > To: stable@dpdk.org > Cc: ktraynor@redhat.com; Yongseok Koh > Subject: [dpdk-stable] [PATCH v2 2/3] [18.11] net/mlx5: remove device > register remap >=20 > From: Yongseok Koh >=20 > UAR (User Access Region) register does not need to be remapped for > primary process but it should be remapped only for secondary process. > UAR register table is in the process private structure in rte_eth_devices= [], > (struct mlx5_proc_priv *)rte_eth_devices[port_id].process_private >=20 > The actual UAR table follows the data structure and the table is used for= both > Tx and Rx. >=20 > For Tx, BlueFlame in UAR is used to ring the doorbell. > MLX5_TX_BFREG(txq) is defined to get a register for the txq. Processes > access its own private data to acquire the register from the UAR table. >=20 > For Rx, the doorbell in UAR is required in arming CQ event. However, it i= s a > known issue that the register isn't remapped for secondary process. >=20 > Signed-off-by: Yongseok Koh > Signed-off-by: Viacheslav Ovsiienko Tested-by: Ali Alnubani