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Wed, 9 Sep 2026 05:46:23 -0500 Received: from junhua-PC.amd.com (10.180.168.240) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server id 15.2.2562.46 via Frontend Transport; Wed, 9 Sep 2026 05:46:22 -0500 From: Junhua Shen To: CC: Vitaly Prosyak , Jesse Zhang , Sunil Khatri , Honglei Huang , Huang Rui , Yiru Ma , Junhua Shen Subject: [PATCH i-g-t v2 6/6] tests/amdgpu: query KFD aperture node count before filling array Date: Wed, 9 Sep 2026 18:46:02 +0800 Message-ID: <20260909104602.13807-7-Junhua.Shen@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260909104602.13807-1-Junhua.Shen@amd.com> References: <20260909104602.13807-1-Junhua.Shen@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF000252A4:EE_|PH8PR12MB7375:EE_ X-MS-Office365-Filtering-Correlation-Id: e14d10a7-37b1-4216-4705-08df0e5f981d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Ip=[165.204.84.17]; Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000252A4.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB7375 X-BeenThere: igt-dev@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development mailing list for IGT GPU Tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" kfd_get_gpuvm_base() passed num_of_nodes = NUM_OF_SUPPORTED_GPUS unconditionally, which the kernel rejects with -EINVAL via kfd_ioctl_get_process_apertures_new()'s 'num_of_nodes > kfd_topology_get_num_devices()' check. Follow the documented two-step protocol instead: an initial call with num_of_nodes == 0 returns the actual node count without touching the array, then fill up to that count (capped at the array capacity). Signed-off-by: Junhua Shen --- tests/amdgpu/amd_kfd_dmabuf_unload.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tests/amdgpu/amd_kfd_dmabuf_unload.c b/tests/amdgpu/amd_kfd_dmabuf_unload.c index 28caf8982..f0d076910 100644 --- a/tests/amdgpu/amd_kfd_dmabuf_unload.c +++ b/tests/amdgpu/amd_kfd_dmabuf_unload.c @@ -132,9 +132,15 @@ static int kfd_get_gpuvm_base(int fd, uint32_t gpu_id, struct kfd_ioctl_get_process_apertures_new_args args = {}; uint32_t i; + if (ioctl(fd, AMDKFD_IOC_GET_PROCESS_APERTURES_NEW, &args)) + return -errno; + if (args.num_of_nodes == 0) + return -ENODEV; + if (args.num_of_nodes > NUM_OF_SUPPORTED_GPUS) + args.num_of_nodes = NUM_OF_SUPPORTED_GPUS; + args.kfd_process_device_apertures_ptr = (uint64_t)(uintptr_t)aps; - args.num_of_nodes = NUM_OF_SUPPORTED_GPUS; if (ioctl(fd, AMDKFD_IOC_GET_PROCESS_APERTURES_NEW, &args)) return -errno; -- 2.34.1