linux-kernel - [PATCH 0/3] drm/nouveau: Support larger GPFIFO ring buffer size on Maxwell+

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Message-Id: <20260109-nouveau-gpfifo-increase-v1-0-ed0be9822878@mary.zone>
Date: Fri, 09 Jan 2026 18:30:09 +0100
From: Mary Guillemard <mary@...y.zone>
To: 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>
Cc: dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org, 
 linux-kernel@...r.kernel.org, Mary Guillemard <mary@...y.zone>
Subject: [PATCH 0/3] drm/nouveau: Support larger GPFIFO ring buffer size on
 Maxwell+

This series increases the limit of the GPFIFO ring buffer to 32768
entries on Maxwell and later.

This allows up to 16382 entries to be used by userspace instead of
the previously 510 entries and should help having more pushbuffers in
flight.

Signed-off-by: Mary Guillemard <mary@...y.zone>
---
Mary Guillemard (3):
      drm/nouveau/chan: Store channel allocation details in nouveau_channel
      drm/nouveau: Unify GPFIFO ring buffer max count query
      drm/nouveau: Increase GPFIFO ring buffer size on Maxwell+

 drivers/gpu/drm/nouveau/nouveau_abi16.c | 37 +++++++++++++++++++++++++++------
 drivers/gpu/drm/nouveau/nouveau_chan.c  | 23 ++++++++++++--------
 drivers/gpu/drm/nouveau/nouveau_chan.h  | 19 +++++++++++++++++
 drivers/gpu/drm/nouveau/nouveau_dma.h   |  3 ---
 4 files changed, 64 insertions(+), 18 deletions(-)
---
base-commit: 0244539f9a4f3b564604dfe4d639f61cecec381a
change-id: 20260109-nouveau-gpfifo-increase-da3e9a85efdd

Best regards,
-- 
Mary Guillemard <mary@...y.zone>