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Wed, 21 Apr 2021 10:42:13 +0000 Received: from HQMAIL105.nvidia.com (172.20.187.12) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 21 Apr 2021 10:42:12 +0000 Received: from vdi.nvidia.com (172.20.145.6) by mail.nvidia.com (172.20.187.12) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 21 Apr 2021 10:42:10 +0000 From: Eli Cohen To: , CC: , , Subject: [PATCH] vdpa/mlx5: Add support for doorbell bypassing Date: Wed, 21 Apr 2021 13:41:45 +0300 Message-ID: <20210421104145.115907-1-elic@nvidia.com> X-Mailer: git-send-email 2.30.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: e8aebc16-f17d-4aea-2f0c-08d904b21fc8 X-MS-TrafficTypeDiagnostic: MN2PR12MB4566: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1728; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.112.34;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:schybrid03.nvidia.com;CAT:NONE;SFS:(4636009)(376002)(136003)(396003)(39860400002)(346002)(36840700001)(46966006)(47076005)(36906005)(186003)(86362001)(316002)(1076003)(4326008)(426003)(70206006)(7696005)(5660300002)(336012)(2616005)(8676002)(82310400003)(107886003)(70586007)(7636003)(356005)(8936002)(36756003)(110136005)(2906002)(6666004)(478600001)(36860700001)(26005)(83380400001)(82740400003)(54906003);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Apr 2021 10:42:13.2319 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e8aebc16-f17d-4aea-2f0c-08d904b21fc8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.112.34];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT063.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4566 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implement mlx5_get_vq_notification() to return the doorbell address. Size is set to one system page as required. Signed-off-by: Eli Cohen --- drivers/vdpa/mlx5/core/mlx5_vdpa.h | 1 + drivers/vdpa/mlx5/core/resources.c | 1 + drivers/vdpa/mlx5/net/mlx5_vnet.c | 6 ++++++ 3 files changed, 8 insertions(+) diff --git a/drivers/vdpa/mlx5/core/mlx5_vdpa.h b/drivers/vdpa/mlx5/core/mlx5_vdpa.h index b6cc53ba980c..49de62cda598 100644 --- a/drivers/vdpa/mlx5/core/mlx5_vdpa.h +++ b/drivers/vdpa/mlx5/core/mlx5_vdpa.h @@ -41,6 +41,7 @@ struct mlx5_vdpa_resources { u32 pdn; struct mlx5_uars_page *uar; void __iomem *kick_addr; + u64 phys_kick_addr; u16 uid; u32 null_mkey; bool valid; diff --git a/drivers/vdpa/mlx5/core/resources.c b/drivers/vdpa/mlx5/core/resources.c index 6521cbd0f5c2..665f8fc1710f 100644 --- a/drivers/vdpa/mlx5/core/resources.c +++ b/drivers/vdpa/mlx5/core/resources.c @@ -247,6 +247,7 @@ int mlx5_vdpa_alloc_resources(struct mlx5_vdpa_dev *mvdev) goto err_key; kick_addr = mdev->bar_addr + offset; + res->phys_kick_addr = kick_addr; res->kick_addr = ioremap(kick_addr, PAGE_SIZE); if (!res->kick_addr) { diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c index 10c5fef3c020..680751074d2a 100644 --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c @@ -1865,8 +1865,14 @@ static void mlx5_vdpa_free(struct vdpa_device *vdev) static struct vdpa_notification_area mlx5_get_vq_notification(struct vdpa_device *vdev, u16 idx) { + struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev); struct vdpa_notification_area ret = {}; + struct mlx5_vdpa_net *ndev; + + ndev = to_mlx5_vdpa_ndev(mvdev); + ret.addr = (phys_addr_t)ndev->mvdev.res.phys_kick_addr; + ret.size = PAGE_SIZE; return ret; } -- 2.30.1