linux-kernel - [PATCH v3 0/5] drm/nouveau: Enable variable page sizes and compression

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Message-ID: <20251030230357.45070-1-mohamedahmedegypt2001@gmail.com>
Date: Fri, 31 Oct 2025 01:03:52 +0200
From: Mohamed Ahmed <mohamedahmedegypt2001@...il.com>
To: linux-kernel@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org,
	Mary Guillemard <mary@...y.zone>,
	Faith Ekstrand <faith.ekstrand@...labora.com>,
	Lyude Paul <lyude@...hat.com>,
	Danilo Krummrich <dakr@...nel.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	nouveau@...ts.freedesktop.org,
	Mohamed Ahmed <mohamedahmedegypt2001@...il.com>
Subject: [PATCH v3 0/5] drm/nouveau: Enable variable page sizes and compression

The new VM_BIND interface only supported 4K pages. This was problematic as
it left performance on the table because GPUs don't have sophisticated TLB
and page walker hardware. 

Additionally, the HW can only do compression on large (64K) and huge (2M)
pages, which is a major performance booster (>50% in some cases).

This patchset sets out to add support for larger page sizes and also
enable compression and set the compression tags when userspace binds with
the corresponding PTE kinds and alignment. It also increments the nouveau
version number which allows userspace to use compression only when the
kernel actually supports both features and avoid breaking the system if a
newer mesa version is paired with an older kernel version.

For the associated userspace MR, please see !36450:
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36450

- v3: Add reviewed-by tags, revert page selection logic to v1 behavior.
- v2: Implement review comments, change page selection logic.
- v1: Initial implementation.

Ben Skeggs (2):
  drm/nouveau/mmu/gp100: Remove unused/broken support for compression
  drm/nouveau/mmu/tu102: Add support for compressed kinds

Mary Guillemard (2):
  drm/nouveau/uvmm: Prepare for larger pages
  drm/nouveau/uvmm: Allow larger pages

Mohamed Ahmed (1):
  drm/nouveau/drm: Bump the driver version to 1.4.1 to report new
    features

 drivers/gpu/drm/nouveau/nouveau_drv.h         |   4 +-
 drivers/gpu/drm/nouveau/nouveau_uvmm.c        | 102 +++++++++++++++---
 drivers/gpu/drm/nouveau/nouveau_uvmm.h        |   1 +
 .../drm/nouveau/nvkm/subdev/mmu/vmmgp100.c    |  69 +++++++-----
 .../drm/nouveau/nvkm/subdev/mmu/vmmgp10b.c    |   4 +-
 5 files changed, 131 insertions(+), 49 deletions(-)

-- 
2.51.1