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Tue, 10 Feb 2026 21:48:09 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by SJ5PEPF000001CF.mail.protection.outlook.com (10.167.242.43) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9611.8 via Frontend Transport; Tue, 10 Feb 2026 21:48:09 +0000 Received: from david-B650-PG-Lightning.amd.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Tue, 10 Feb 2026 15:48:01 -0600 From: "David (Ming Qiang) Wu" To: , , CC: , , Subject: [PATCH 11/14] drm/amdgpu: add AMDGPU_INFO_DOORBELL Date: Tue, 10 Feb 2026 16:47:26 -0500 Message-ID: <20260210214729.80964-12-David.Wu3@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260210214729.80964-1-David.Wu3@amd.com> References: <20260210214729.80964-1-David.Wu3@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: satlexmb07.amd.com (10.181.42.216) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ5PEPF000001CF:EE_|IA1PR12MB8223:EE_ X-MS-Office365-Filtering-Correlation-Id: 9d3765e7-e2c1-4384-4767-08de68ee14e1 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: SJ5PEPF000001CF.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB8223 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" Use it to get the doorbell range and aggregated doorbell enablement and offset. This patch only supports VCN for now. V2 - drop VPE and use vcn.agdb_offset saved in umsch_mm_agdb_index_init() (suggested by Alex) Signed-off-by: David (Ming Qiang) Wu Reviewed-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 18 ++++++++++++++++++ include/uapi/drm/amdgpu_drm.h | 13 +++++++++++++ 2 files changed, 31 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c index f512b6ec6c53..1b935d285053 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c @@ -1425,6 +1425,24 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) return -EINVAL; } } + case AMDGPU_INFO_DOORBELL: { + struct drm_amdgpu_info_doorbell doorbell_info = {}; + /* note: may need to check asic_type */ + switch (info->query_hw_ip.type) { + case AMDGPU_HW_IP_VCN_ENC: + if (adev->agdb_bo) { + doorbell_info.agdb_enable = 1; + doorbell_info.agdb_offset = adev->vcn.agdb_offset; + } + doorbell_info.index_start = adev->doorbell_index.vcn.vcn_ring0_1 << 1; + doorbell_info.index_end = (adev->doorbell_index.vcn.vcn_ring6_7 << 1) + 1; + break; + default: + return -EINVAL; + } + return copy_to_user(out, &doorbell_info, + min((size_t)size, sizeof(doorbell_info))) ? -EFAULT : 0; + } default: DRM_DEBUG_KMS("Invalid request %d\n", info->query); return -EINVAL; diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h index 3e7c12d5987f..902201303700 100644 --- a/include/uapi/drm/amdgpu_drm.h +++ b/include/uapi/drm/amdgpu_drm.h @@ -1279,6 +1279,8 @@ struct drm_amdgpu_cs_chunk_cp_gfx_shadow { #define AMDGPU_INFO_GPUVM_FAULT 0x23 /* query FW object size and alignment */ #define AMDGPU_INFO_UQ_FW_AREAS 0x24 +/* query doorbell info */ +#define AMDGPU_INFO_DOORBELL 0x25 #define AMDGPU_INFO_MMR_SE_INDEX_SHIFT 0 #define AMDGPU_INFO_MMR_SE_INDEX_MASK 0xff @@ -1688,6 +1690,17 @@ struct drm_color_ctm_3x4 { __u64 matrix[12]; }; +/* for AMDGPU_INFO_DOORBELL query */ +struct drm_amdgpu_info_doorbell { + __u32 index_start; + /* could be equal to index_start */ + __u32 index_end; + /* aggregated doorbell, 0 for disable */ + __u32 agdb_enable; + /* if agdb_enable, it is a value in [index_start, index_end] */ + __u32 agdb_offset; +}; + #if defined(__cplusplus) } #endif -- 2.43.0