nouveau/instmem: use iomapping interface for instmem handling

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This avoids constant need to ioremap when instobjs move at least on
64-bit systems.

This create the io mapping on first use, because creating it at init
time causes a resource mapping error, because nouveau hasn't kicked
simpledrm off the hardware yet, but ioremap_wc the whole BAR causes an
overlap with BOOTFB/simpledrm. I think the resource system could do
better here, but it's easier to just delay creating the mapping until
first use.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patch.msgid.link/20260706030520.857104-1-airlied@gmail.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

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Dave Airlie 2026-07-06 13:05:20 +10:00 • committed by Danilo Krummrich

parent a284476db2

commit 34e27b9055

3 changed files with 32 additions and 9 deletions

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1

drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r535/fbsr.c

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39

drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c

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1

drivers/gpu/drm/nouveau/nvkm/subdev/instmem/priv.h

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