kernel/linux.git/Documentation/gpu/rfc, branch v6.18.21

drm/gpusvm, drm/pagemap: Move migration functionality to drm_pagemap

2025-06-26T16:00:07+00:00

The migration functionality and track-keeping of per-pagemap VRAM mapped to the CPU mm is not per GPU_vm, but rather per pagemap. This is also reflected by the functions not needing the drm_gpusvm structures. So move to drm_pagemap. With this, drm_gpusvm shouldn't really access the page zone-device-data since its meaning is internal to drm_pagemap. Currently it's used to reject mapping ranges backed by multiple drm_pagemap allocations. For now, make the zone-device-data a void pointer. Alter the interface of drm_gpusvm_migrate_to_devmem() to ensure we don't pass a gpusvm pointer. Rename CONFIG_DRM_XE_DEVMEM_MIRROR to CONFIG_DRM_XE_PAGEMAP. Matt is listed as author of this commit since he wrote most of the code, and it makes sense to retain his git authorship. Thomas mostly moved the code around. v3: - Kerneldoc fixes (CI) - Don't update documentation about how the drm_pagemap migration should be interpreted until upcoming patches where the functionality is implemented. (Matt Brost) v4: - More kerneldoc fixes around timeslice_ms (Himal Ghimiray, Matt Brost) v6: - Fix an uninitialized pagemap pointer (CI) Co-developed-by: Thomas Hellström Signed-off-by: Thomas Hellström Reviewed-by: Himal Prasad Ghimiray Signed-off-by: Matthew Brost Link: https://lore.kernel.org/r/20250619134035.170086-2-thomas.hellstrom@linux.intel.com

Fix spelling error for 'parallel'

2025-05-19T11:33:48+00:00

Signed-off-by: Anish Dabhane Signed-off-by: Jonathan Corbet Message-ID: <20250518140107.21310-1-anishdabhane71@gmail.com>

drm/gpusvm: Fix kernel-doc

2025-03-13T03:53:47+00:00

Due to wrong `.. kernel-doc` directive in Documentation/gpu/rfc/gpusvm.rst the documentation was actually not parsing anything from drivers/gpu/drm/drm_gpusvm.c. This fixes the kernel-doc include and all warnings/errors created when doing so. Cc: Simona Vetter Cc: Dave Airlie Cc: Christian König Cc: dri-devel@lists.freedesktop.org Cc: Matthew Brost Cc: Thomas Hellström Reported-by: Stephen Rothwell Closes: https://lore.kernel.org/intel-xe/20250307195239.57abcd2d@canb.auug.org.au/ Fixes: 99624bdff867 ("drm/gpusvm: Add support for GPU Shared Virtual Memory") Reviewed-by: Matthew Brost Link: https://patchwork.freedesktop.org/patch/msgid/20250307-fix-svm-kerneldoc-v2-1-03c74b199620@intel.com Signed-off-by: Lucas De Marchi (cherry picked from commit 4da1fb61e02a783fdd7eb725ea03d897b8ef19ea) Signed-off-by: Lucas De Marchi

drm/doc: gpusvm: Add GPU SVM documentation

2025-03-06T19:38:21+00:00

Add documentation for agree upon GPU SVM design principles, current status, and future plans. v4: - Address Thomas's feedback v5: - s/Current/Basline (Thomas) v7: - Add license (CI) - Add examples for design guideline reasoning (Alistair) - Add snippet about possible livelock with concurrent GPU and and CPU access (Alistair) Signed-off-by: Matthew Brost Reviewed-by: Thomas Hellström Acked-by: Alistair Popple Link: https://patchwork.freedesktop.org/patch/msgid/20250306012657.3505757-33-matthew.brost@intel.com

drm/i915: Drop dead code for xehpsdv

2024-03-22T21:14:39+00:00

PCI IDs for XEHPSDV were never added and platform always marked with force_probe. Drop what's not used and rename some places to either be xehp or dg2, depending on the platform/IP checks. The registers not used anymore are also removed. Reviewed-by: Rodrigo Vivi Acked-by: Tvrtko Ursulin Link: https://patchwork.freedesktop.org/patch/msgid/20240320060543.4034215-2-lucas.demarchi@intel.com Signed-off-by: Lucas De Marchi

drm/doc/rfc: Removing missing reference to xe.rst

2024-01-19T16:36:26+00:00

The file has already been deleted as the tasks were completed. However the index reference was missed behind. fixes a doc build warning: Documentation/gpu/rfc/index.rst:35: WARNING: toctree contains reference to nonexisting document 'gpu/rfc/xe' Fixes: d11dc7aa98e5 ("drm/doc/rfc: Remove Xe's pre-merge plan") Cc: Lucas De Marchi Signed-off-by: Rodrigo Vivi Reviewed-by: Matthew Auld Link: https://patchwork.freedesktop.org/patch/msgid/20240116220331.145607-1-rodrigo.vivi@intel.com

drm/doc/rfc: Remove Xe's pre-merge plan

2024-01-10T20:27:05+00:00

The last TODO item here that was not marked as done was the display portion, which came along with the pull-request. So, now that Xe is part of drm-next and it includes the display portion, let's entirely kill this RFC here. Cc: Lucas De Marchi Cc: Thomas Hellström Cc: Oded Gabbay Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20240110190427.63095-1-rodrigo.vivi@intel.com Acked-by: Lucas De Marchi

drm/doc/rfc: Xe is using drm_exec, so mark as completed

2023-12-07T16:01:12+00:00

Nothing else to be done on this front from Xe perspective. Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20231201042158.80009-6-rodrigo.vivi@intel.com Acked-by: Daniel Vetter

drm/doc/rfc: Move userptr integration and vm_bind to the 'completed' section

2023-12-07T16:00:58+00:00

The must-have part of the documentation was already added to the existing /gpu/drm-vm-bind-async. The other extra discussion around GPUVM helpers are currently active in the community. None of those discussion should block Xe since documentation, specially around locking was completed in a community consensus. Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20231201042158.80009-5-rodrigo.vivi@intel.com Acked-by: Daniel Vetter

drm/doc/rfc: Move Xe 'ASYNC VM_BIND' to the 'completed' section

2023-12-07T16:00:51+00:00

As already indicated in this block, the consensus was already reached out and documented as: The ASYNC VM_BIND document However this was item was not moved to the completed section. Let's move and clean up the WIP block. Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20231201042158.80009-4-rodrigo.vivi@intel.com Acked-by: Daniel Vetter