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([10.245.244.196]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Jun 2025 06:40:52 -0700 From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= To: intel-xe@lists.freedesktop.org Cc: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= , dri-devel@lists.freedesktop.org, himal.prasad.ghimiray@intel.com, apopple@nvidia.com, airlied@gmail.com, Simona Vetter , =?UTF-8?q?Felix=20K=C3=BChling?= , "Philip Yang" , Matthew Brost , =?UTF-8?q?Christian=20K=C3=B6nig?= , dakr@kernel.org, "Mrozek, Michal" , Joonas Lahtinen Subject: [PATCH v6 0/3] drm/gpusvm, drm/pagemap, drm/xe: Restructure migration in preparation for multi-device Date: Thu, 19 Jun 2025 15:40:32 +0200 Message-ID: <20250619134035.170086-1-thomas.hellstrom@linux.intel.com> X-Mailer: git-send-email 2.49.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" This patchset modifies the migration part of drm_gpusvm to drm_pagemap and adds a populate_mm() op to drm_pagemap. The idea is that the device that receives a pagefault determines if it wants to migrate content and to where. It then calls the populate_mm() method of relevant drm_pagemap. This functionality was mostly already in place, but hard-coded for xe only without going through a pagemap op. Since we might be dealing with separate devices moving forward, it also now becomes the responsibilit of the populate_mm() op to grab any necessary local device runtime pm references and keep them held while its pages are present in an mm (struct mm_struct). On thing to decide here is whether the populate_mm() callback should sit on a struct drm_pagemap for now while we sort multi-device usability out or whether we should add it (or something equivalent) to struct dev_pagemap. v2: - Rebase. v3: - Documentation updates (CI, Matt Brost) - Don't change TTM buffer object type for VRAM allocations (Matt Brost) v4: - Documentation Updates (Himal Ghimiray, Matt Brost) - Add an assert (Matt Brost) v5: - Rebase - Add R-Bs and SOBs. v6: - Fix an uninitialized variable (CI) Matthew Brost (1): drm/gpusvm, drm/pagemap: Move migration functionality to drm_pagemap Thomas Hellström (2): drm/pagemap: Add a populate_mm op drm/xe: Implement and use the drm_pagemap populate_mm op Documentation/gpu/rfc/gpusvm.rst | 12 +- drivers/gpu/drm/Makefile | 6 +- drivers/gpu/drm/drm_gpusvm.c | 762 +----------------------- drivers/gpu/drm/drm_pagemap.c | 838 +++++++++++++++++++++++++++ drivers/gpu/drm/xe/Kconfig | 10 +- drivers/gpu/drm/xe/xe_bo_types.h | 2 +- drivers/gpu/drm/xe/xe_device_types.h | 2 +- drivers/gpu/drm/xe/xe_svm.c | 125 ++-- drivers/gpu/drm/xe/xe_svm.h | 10 +- drivers/gpu/drm/xe/xe_tile.h | 11 + drivers/gpu/drm/xe/xe_vm.c | 2 +- include/drm/drm_gpusvm.h | 96 --- include/drm/drm_pagemap.h | 135 +++++ 13 files changed, 1099 insertions(+), 912 deletions(-) create mode 100644 drivers/gpu/drm/drm_pagemap.c -- 2.49.0