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client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by DS2PEPF0000343C.mail.protection.outlook.com (10.167.18.39) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8901.15 via Frontend Transport; Tue, 8 Jul 2025 07:51:29 +0000 Received: from SATLEXMB04.amd.com (10.181.40.145) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Tue, 8 Jul 2025 02:51:27 -0500 Received: from hjbog-srdc-41.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server id 15.1.2507.39 via Frontend Transport; Tue, 8 Jul 2025 02:51:22 -0500 From: Samuel Zhang To: , , , , , , , , , , , , , , CC: , , , , , , , , , , "Samuel Zhang" Subject: [PATCH v3 1/5] drm/ttm: add new api ttm_device_prepare_hibernation() Date: Tue, 8 Jul 2025 15:42:44 +0800 Message-ID: <20250708074248.1674924-2-guoqing.zhang@amd.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20250708074248.1674924-1-guoqing.zhang@amd.com> References: <20250708074248.1674924-1-guoqing.zhang@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: None (SATLEXMB04.amd.com: guoqing.zhang@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS2PEPF0000343C:EE_|IA4PR12MB9810:EE_ X-MS-Office365-Filtering-Correlation-Id: b4f1bbf4-4fbc-4a7c-0fb9-08ddbdf43f9e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|82310400026|36860700013|1800799024|921020; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jul 2025 07:51:29.2667 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b4f1bbf4-4fbc-4a7c-0fb9-08ddbdf43f9e X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS2PEPF0000343C.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA4PR12MB9810 Content-Type: text/plain; charset="utf-8" This new api is used for hibernation to move GTT BOs to shmem after VRAM eviction. shmem will be flushed to swap disk later to reduce the system memory usage for hibernation. Signed-off-by: Samuel Zhang --- drivers/gpu/drm/ttm/ttm_device.c | 22 ++++++++++++++++++++++ include/drm/ttm/ttm_device.h | 1 + 2 files changed, 23 insertions(+) diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_dev= ice.c index 02e797fd1891..f14437ea0cce 100644 --- a/drivers/gpu/drm/ttm/ttm_device.c +++ b/drivers/gpu/drm/ttm/ttm_device.c @@ -123,6 +123,28 @@ static int ttm_global_init(void) return ret; } =20 +/** + * move GTT BOs to shmem for hibernation. + * + * returns 0 on success, negative on failure. + */ +int ttm_device_prepare_hibernation(struct ttm_device *bdev) +{ + struct ttm_operation_ctx ctx =3D { + .interruptible =3D false, + .no_wait_gpu =3D false, + .force_alloc =3D true + }; + int ret; + + guard(mutex)(&ttm_global_mutex); + do { + ret =3D ttm_device_swapout(bdev, &ctx, GFP_KERNEL); + } while (ret > 0); + return ret; +} +EXPORT_SYMBOL(ttm_device_prepare_hibernation); + /* * A buffer object shrink method that tries to swap out the first * buffer object on the global::swap_lru list. diff --git a/include/drm/ttm/ttm_device.h b/include/drm/ttm/ttm_device.h index 39b8636b1845..592b5f802859 100644 --- a/include/drm/ttm/ttm_device.h +++ b/include/drm/ttm/ttm_device.h @@ -272,6 +272,7 @@ struct ttm_device { int ttm_global_swapout(struct ttm_operation_ctx *ctx, gfp_t gfp_flags); int ttm_device_swapout(struct ttm_device *bdev, struct ttm_operation_ctx *= ctx, gfp_t gfp_flags); +int ttm_device_prepare_hibernation(struct ttm_device *bdev); =20 static inline struct ttm_resource_manager * ttm_manager_type(struct ttm_device *bdev, int mem_type) --=20 2.43.5