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Thu, 23 Jul 2020 11:58:29 +0000 Received: from AM6PR05MB5176.eurprd05.prod.outlook.com ([fe80::9024:accb:4d6b:805f]) by AM6PR05MB5176.eurprd05.prod.outlook.com ([fe80::9024:accb:4d6b:805f%3]) with mapi id 15.20.3195.028; Thu, 23 Jul 2020 11:58:29 +0000 From: Ori Kam To: Slava Ovsiienko , "dev@dpdk.org" CC: Matan Azrad , Raslan Darawsheh , Thomas Monjalon , Dekel Peled Thread-Topic: [dpdk-dev] [PATCH] net/mlx5: fix UAR memory mapping type Thread-Index: AQHWYDivMY63UzKV4U2DswLodtdpbKkVEGsA Date: Thu, 23 Jul 2020 11:58:29 +0000 Message-ID: References: <1595429948-20873-1-git-send-email-viacheslavo@mellanox.com> In-Reply-To: <1595429948-20873-1-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: [147.236.152.129] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 354015f5-28bc-4fab-69db-08d82effb70f x-ms-traffictypediagnostic: AM6PR0502MB3910: x-ld-processed: a652971c-7d2e-4d9b-a6a4-d149256f461b,ExtAddr,ExtFwd x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:9508; 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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: AM6PR05MB5176.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 354015f5-28bc-4fab-69db-08d82effb70f X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Jul 2020 11:58:29.4124 (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: U+HvxjPD7SLc5iVFjChhQFI79mH+cKB4wTNHgVkf26rvFixx4J8wET0LM1eo+KSdVVAADqAjmVxFbKwZS+UX8g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR0502MB3910 Subject: Re: [dpdk-dev] [PATCH] net/mlx5: fix UAR memory mapping type 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" > -----Original Message----- > From: dev On Behalf Of Viacheslav Ovsiienko >=20 > The User Access Region is a special mechanism to provide direct > access to the hardware registers, and is the part of PCI address > space that is mapped to CPU virtual address. The mapping can be > performed with the type "Write-Combining" or "Non-Cached", and > these ones might be supported or not on different setups. >=20 > To prevent device probing failure the UAR allocation attempt > with alternative mapping type is performed. The datapath > takes the actual UAR mapping into account on queue creation. >=20 > There was another issue with NULL UAR base address. > OFED 5.0.x and Upstream rdma_core before v29 returned the NULL as > UAR base address if UAR was not the first object in the UAR page. > It caused the PMD failure and we should try to get another UAR > till we get the first one with non-NULL base address returned. >=20 > Fixes: fc4d4f732bbc ("net/mlx5: introduce shared UAR resource") >=20 > Signed-off-by: Viacheslav Ovsiienko > --- > -- > 1.8.3.1 Acked-by: Ori Kam Thanks, Ori