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Thu, 15 May 2025 10:17:07 -0700 Date: Thu, 15 May 2025 10:17:06 -0700 From: Nicolin Chen To: Jason Gunthorpe CC: , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v4 10/23] iommufd/viommu: Introduce IOMMUFD_OBJ_HW_QUEUE and its related struct Message-ID: References: <20250515153903.GI382960@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20250515153903.GI382960@nvidia.com> X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH1PEPF0000A349:EE_|PH7PR12MB9151:EE_ X-MS-Office365-Filtering-Correlation-Id: 20fef7d5-e850-4eb5-87a6-08dd93d45c9d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|1800799024|36860700013|376014|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?JobERncr8Ke0ylaGhIgNAzhag6WFAutnTlM25yBoKan1g6yKy3pN65opUvtx?= =?us-ascii?Q?4oQjo/wmeWQE7HUhpAfBE8wbuS+3ZN28YipRUhvvRshv3wIEl941ZiJrUaz7?= =?us-ascii?Q?SDm5hVlgsXbH2g6IUQjHLJEg6Nex0DIR54Md1L3zuzXEY/sxg9c6Xjtyj7FY?= =?us-ascii?Q?9K/QbKdw3MOGZK535vbuvdWnuHm3YkgAQc/zrRpC9cF72+DgkF0QqBvx2rM9?= =?us-ascii?Q?Vit3J4+1ToP8G+I+qky1chKpsrAUrgZfXr7kywZ6Ehkxq+CevekZwVY2SDiK?= =?us-ascii?Q?NR0QoonfPxoP+ZkD653JZbAvCkyU8NMzj4z/tZHTSqfRfZaxulFkiHXFssTq?= =?us-ascii?Q?LxIvr7HJ8l9ZpJ6xDPz6neNOxWyzmU1DrbcygaheRSgkLN5mOTigJtwsZ+/S?= =?us-ascii?Q?UzB2IiwB1gwFfdWdLvSEuBrTqV4ivpvccxtwBar3Ih1zz5WQaeZERALCeN+O?= =?us-ascii?Q?utYcSqD/SBN+9j8lOPQjIdQ9BhZkAWkH9x0fuNECk8km5JLIjfkjAtNnLHWQ?= =?us-ascii?Q?xvWncDrckOJ5Zd+iz3WBh95somm2HTpBy30MN+NTUbyiyeCEagMJd+bpKD4p?= =?us-ascii?Q?bWe1pDvwE+HxPMj/eY5Lc36iKnZpGoCYnJD5vdnOcw9+ffqlOqhWRrqCM/xy?= =?us-ascii?Q?DM5OqurdvbNvevJOK9Jxb3J4qtiJIbExLTFk1Vo3Bpxo5axwivFZL7KQKMGF?= =?us-ascii?Q?NwOTlfmdp47/LtSZKIAgYAeikVt5CW4A6iMEk2P2CvzXlZzdqqUAoB4mDnVI?= =?us-ascii?Q?6EhkaFSenVndCI7jKVrh2Cih9K8rblta3Xl9RFZHo+W5WxUi6fTQd6ofNRZr?= =?us-ascii?Q?UVnjDHfJGXLM9QkriamAZr1QhQjBth1ids3LYzxBCr7E+uUB8HktLyqwZL4V?= =?us-ascii?Q?/fQEDYhypLKbwH1srE1Nrp7102ILtHPLQGzv8RZ6wNlzo0pAzfCMPLitzApS?= =?us-ascii?Q?S7tIiqhUg9woH6aJSla4xWROL1y/3Cssz4zg5jvC6+a3/ijJlDpKrBd+QjoO?= =?us-ascii?Q?QeK6QsgQbSZiOGBwrBJnB/EtKZb37keyOc4cfJ5NjKpfLIeqTjvdhs13E2cv?= =?us-ascii?Q?OgJZJbyFjEIYHjQlWrzHbqrU78lKTHfARAmmyefROo+2ZI51v2W+tbvN92q6?= =?us-ascii?Q?x/Q+x94dRHXnTE/aL9NgGM9mJlUOUUl56sGnm+4zefhRV7o3Grdj7O599/g5?= =?us-ascii?Q?u2uWUFUGX/XKqofFLtEFENSQFVZsKVXum6ngqsfVdZLq90Jnl6HxBYGIYcZt?= =?us-ascii?Q?tBeJSwrzhg38yovhmXwPDy5fyIjY1IiJEefPuIk/IsmCx7lMb/0l89YRo3Ox?= =?us-ascii?Q?nZBysVsPTX5OJ5OCKIn3JZwdrn42tCpzUuwEr280S/EPNdksxe3jWSEY9D/b?= =?us-ascii?Q?9XogQEqDvTNXY6mxvRsTLhYwro69CvGGrMzsAYKTujGrLXOotl4HTzVtQr/S?= =?us-ascii?Q?3ERtXFUBFmuivOIdaltk+RaiLSznzYAr0rn9t+sZgBDyto3oeSWAdhYgTAKH?= =?us-ascii?Q?t1McvIVSZL528OPOLgReG9Ja6cbP82nyIXWn?= X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(7416014)(1800799024)(36860700013)(376014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 May 2025 17:17:25.1157 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 20fef7d5-e850-4eb5-87a6-08dd93d45c9d X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CH1PEPF0000A349.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB9151 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250515_101729_942161_A171A3C2 X-CRM114-Status: GOOD ( 15.75 ) 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 Thu, May 15, 2025 at 12:39:03PM -0300, Jason Gunthorpe wrote: > On Thu, May 08, 2025 at 08:02:31PM -0700, Nicolin Chen wrote: > > +#define iommufd_hw_queue_alloc(viommu, drv_struct, member) \ > > + ({ \ > > + drv_struct *ret; \ > > + \ > > + static_assert(__same_type(struct iommufd_viommu, *viommu)); \ > > + static_assert(__same_type(struct iommufd_hw_queue, \ > > + ((drv_struct *)NULL)->member)); \ > > + static_assert(offsetof(drv_struct, member.obj) == 0); \ > > + ret = (drv_struct *)_iommufd_object_alloc( \ > > + viommu->ictx, sizeof(drv_struct), \ > > + IOMMUFD_OBJ_HW_QUEUE); \ > > + if (!IS_ERR(ret)) { \ > > + ret->member.viommu = viommu; \ > > + ret->member.ictx = viommu->ictx; \ > > + } \ > > + ret; \ > > + }) > > This should just call > > __iommufd_object_alloc(viommu->ictx, ret, IOMMUFD_OBJ_HW_QUEUE member.obj) > > And all the casting and asserts should be in that macro, move it to > this header Ack. > > /* Helper for IOMMU driver to destroy structures created by allocators above */ > > #define iommufd_struct_destroy(drv_struct, member) \ > > ({ \ > > This is abort not destroy, the names should be consistent. But looking > more at the series I think it will be better to do the little rework I > suggested and not give this function to the driver in the first place. Yea, it will be replaced in v5. Thanks Nicolin