[PATCH v2 0/2] Allow partial memory mapping for cpu memory

[Andi Shyti]

Argh... sorry, I messed up with format-patch and send-mail and
sent it twice.

Maybe I need to resend it if CI complains.

Andi

On Wed, Aug 14, 2024 at 03:48:32PM +0200, Andi Shyti wrote:
> Hi,
> 
> I am resending this patch series, not to disregard the previous
> discussions, but to ensure it gets tested with the IGTs that
> Krzysztof has provided.
> 
> This patch series finalizes the memory mapping fixes and
> improvements by enabling partial memory mapping for CPU memory as
> well.
> 
> The concept of partial memory mapping, achieved by adding an
> object offset, was implicitly introduced in commit 8bdd9ef7e9b1
> ("drm/i915/gem: Fix Virtual Memory mapping boundaries
> calculation") for GTT memory.
> 
> To address a previous discussion with Sima and Matt, this feature
> is used by Mesa and is required across all platforms utilizing
> Mesa. Although Nirmoy suggested using the Fixes tag to backport
> this to previous kernels, I view this as a new feature rather
> than a fix.
> 
> Lionel, please let me know if you have a different perspective
> and believe this should be treated as a bug fix, requiring it
> to be backported to stable kernels.
> 
> The IGTs have been developed in collaboration with the Mesa team
> to replicate the exact Mesa use case[*].
> 
> Thanks Chris for the support, thanks Krzysztof for taking care of
> the IGT tests, thanks Nirmoy for your reviews and thanks Sima and
> Matt for the discussion on this series.
> 
> Andi
> 
> [*] https://patchwork.freedesktop.org/patch/608232/?series=137303&rev=1
> 
> Test-with: 20240814132404.18392-1-krzysztof.niemiec at intel.com
> 
> Changelog:
> ==========
> v1 -> v2
>  - Added Nirmoy's tags.
> 
> Andi Shyti (2):
>   drm/i915/gem: Do not look for the exact address in node
>   drm/i915/gem: Calculate object page offset for partial memory mapping
> 
>  drivers/gpu/drm/i915/gem/i915_gem_mman.c | 10 ++++++----
>  drivers/gpu/drm/i915/i915_mm.c           | 12 +++++++++++-
>  drivers/gpu/drm/i915/i915_mm.h           |  3 ++-
>  3 files changed, 19 insertions(+), 6 deletions(-)
> 
> -- 
> 2.45.2