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Wed, 14 Aug 2024 22:27:15 -0700 Date: Wed, 14 Aug 2024 22:27:14 -0700 From: Nicolin Chen To: Jason Gunthorpe CC: , , , , , , , , , Subject: Re: [PATCH v11 8/9] iommu/arm-smmu-v3: Add in-kernel support for NVIDIA Tegra241 (Grace) CMDQV Message-ID: References: <849c17b97ae0a38db1cee949db2488e4045666df.1722993435.git.nicolinc@nvidia.com> <20240814215753.GY2032816@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20240814215753.GY2032816@nvidia.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF000397B4:EE_|DS7PR12MB8274:EE_ X-MS-Office365-Filtering-Correlation-Id: 4054d5ef-b08b-4c58-762c-08dcbceaf510 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|82310400026|376014|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?I5NKXkSxj0pCkmvtGH8Q0PhP0XSf9F5PKeA7c8GHVlC7+o0iAZOnQIMLPCeN?= =?us-ascii?Q?a//OF6v9TaF44n0+KIVh8XVPB8x3jVKiKk2tcc9KazW8m5xjfGg+JKjzqpeq?= =?us-ascii?Q?4n9iPo1zPBw4ENtUlUh+Cavw2oG7f7Ts8px60e6rTGpKpsMEVj64mM5aAaHl?= =?us-ascii?Q?ZI7AvBe1vQO9b7v47cKrKC6Z0DQo2rd15GJ/FbhRHBmnCXX4R4DUwEGDdOdp?= =?us-ascii?Q?E+0RrJEfxmLIuj+EghQd4x7c74D3MJ9lm4neebQlH8WQd4W9Q9V9i0hTKGzs?= =?us-ascii?Q?qJTQ+6H/tmhq9iT8ZWgrvzq/2VJxwItbXm9ZdoDplv0hRL0/PtiWrLm5e+0X?= =?us-ascii?Q?yzFz9NkIB10foLceHmE9OMRhSAXhlChLclj1DuHFQAt+x04yB9HVtCaqQnM/?= =?us-ascii?Q?jF8pEqdEDePNtBIUphdXOEzL5HHT380+ppie1kV20bNXwAfKqBAu5a1oWJRL?= =?us-ascii?Q?UT19eJMo6N+pYJWWXZ9rJY33AOxTet/80DT+bEiY30WCkTGj7bMyMSKFZMOf?= =?us-ascii?Q?RRdpSWllP8jHbIT3jGl37tJ/raA9L7WWhXtSE3qK6c1Fqed+aD5j09mORi0e?= =?us-ascii?Q?UMgqHySFuuYigwesM8InyjCuS1SdRE+9jbPhWWTdxG4i5wrYMxhUBTlRogNf?= =?us-ascii?Q?BXQ24DaVfpx+TU+AeLQEpuGGjUyGrwJ7V/4sYh0L8v3qIXAVPAF+d+UZEZcd?= =?us-ascii?Q?FWHpg7kr2mZN0IAdq4kUnynfVod0A9A2K6jXXc2niCbw7daSP+I2eJq+VZ0C?= =?us-ascii?Q?q2cgwL5ENxsyG/df3m0D1aAM73H3cvqhMlvaIf3zA6CaQbLT626chjTKsIBW?= =?us-ascii?Q?5rF+CbeFZhwONi/9Gk/sHvmyePiE7GvB+vk+5e79w6jHloDAx7J5c8I8u7r+?= =?us-ascii?Q?6tqHs7/kP51pNV5i0nM0hl3Zivk0Rmi4XgABKod6y7/atacaFjDMcTO1R4kX?= =?us-ascii?Q?nAvI2F5mHUNnEXQlbyKff2VeLJBBQIER6WhfAgxMsQ9358EUqaKVbxMKl55O?= =?us-ascii?Q?Eiyt6FhbO42Rc8mlQzW4puxRc9aIuVz63273Bp93+SblTzjPNI6twsLHijjZ?= =?us-ascii?Q?PP6/XcpBKerAnBdzK61KvkQy51c7avJm2rT0O+qqWAffU47mryRMAssASdN7?= =?us-ascii?Q?BKE5EQmPt0R/75wrcI83AISAGxOOjtaYXXLLAAiM3pMchfThovX3WwPjmuQ1?= =?us-ascii?Q?5yTAfm3DbOZkpPvlC4S20Y4F5HCzy4CvdQUI5jaA36WTh9atKbjBixyUdpko?= =?us-ascii?Q?QXuMQqMhxLYNk5gvv+T+pUAN5Iph0po+8aChdtA8GcZN0mJJBUex8+6zPxq3?= =?us-ascii?Q?cCJ4HPCYV6CPN4f4uOR336Oo8Uw8NvYg0Lp9axsNlXFjgBgoQyb8o/gyCvwp?= =?us-ascii?Q?p62xAgAoC8NThfyAtkFRTX8/xskKpmO2HYfeG2hu7Kmm6Ukg6huaL+lv70Uz?= =?us-ascii?Q?MF8PhnWv7dhWzstM/iS/1iwZ8vx0ABBX?= X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(36860700013)(82310400026)(376014)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Aug 2024 05:27:29.8227 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4054d5ef-b08b-4c58-762c-08dcbceaf510 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000397B4.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB8274 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240814_222743_400330_5F3F7949 X-CRM114-Status: GOOD ( 13.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Aug 14, 2024 at 06:57:53PM -0300, Jason Gunthorpe wrote: > On Tue, Aug 06, 2024 at 07:11:53PM -0700, Nicolin Chen wrote: > > > +static struct arm_smmu_device * > > +tegra241_cmdqv_probe(struct arm_smmu_device *smmu, > > + struct resource *res, int irq) > > +{ > > + struct tegra241_cmdqv *cmdqv = NULL; > > + struct tegra241_vintf *vintf; > > + void __iomem *base; > > + u32 regval; > > + int lidx; > > + int ret; > > + > > + base = ioremap(res->start, resource_size(res)); > > + if (IS_ERR(base)) { > > + dev_err(smmu->dev, "failed to ioremap: %ld\n", PTR_ERR(base)); > > + goto iounmap; > > + } > > + > > + regval = readl(base + TEGRA241_CMDQV_CONFIG); > > + if (disable_cmdqv) { > > + dev_info(smmu->dev, "Detected disable_cmdqv=true\n"); > > + writel(regval & ~CMDQV_EN, base + TEGRA241_CMDQV_CONFIG); > > + goto iounmap; > > + } > > + > > + cmdqv = devm_krealloc(smmu->dev, smmu, sizeof(*cmdqv), GFP_KERNEL); > > + if (!cmdqv) > > + goto iounmap; > > + smmu = &cmdqv->smmu; > > Should stick a: > > static_assert(offsetof(struct tegra241_cmdqv,smmu) == 0); Done. Thanks! Nicolin > In here. The copy inside the krealloc won't work otherwise. > > But this still seems Ok to me with the new ops > > Jason