On Tue, 23 Mar 2021, Daniel Vetter <daniel.vetter@xxxxxxxx> wrote: > We've discussed a bit how to get the gem/gt team better integrated > and collaborate more with the wider community and agreed to the > following: > > - all gem/gt patches are reviewed on dri-devel for now. That's > overkill, but in the past there was definitely too little of that. > > - i915-gem folks are encouraged to cross review core patches from > other teams > > - big features (especially uapi changes) need to be discussed in an > rfc patch that documents the interface and big picture design, > before we get lost in the details of the code > > - Also a rough TODO (can be refined as we go ofc) to get gem/gt back > on track, like we've e.g. done with DAL/DC to get that in shape. I personally think there should be a lower bar for discussing and editing the TODO items than via patches on the mailing list. Granted, the TODO file enforces the discussion happens at a large enough audience, but for at least some of the items I'd suggest filing gitlab issues [1], with todo label, and tracking there. BR, Jani. [1] https://gitlab.freedesktop.org/drm/intel/-/issues > > Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> > Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> > Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> > Cc: Jason Ekstrand <jason@xxxxxxxxxxxxxx> > Cc: Dave Airlie <airlied@xxxxxxxxxx> > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> > --- > drivers/gpu/drm/i915/TODO.txt | 36 +++++++++++++++++++++++++++++++++++ > 1 file changed, 36 insertions(+) > create mode 100644 drivers/gpu/drm/i915/TODO.txt > > diff --git a/drivers/gpu/drm/i915/TODO.txt b/drivers/gpu/drm/i915/TODO.txt > new file mode 100644 > index 000000000000..d2e5bbb6339d > --- /dev/null > +++ b/drivers/gpu/drm/i915/TODO.txt > @@ -0,0 +1,36 @@ > +gem/gt TODO items > +----------------- > + > +- For discrete memory manager, merge enough dg1 to be able to refactor it to > + TTM. Then land pci ids (just in case that turns up an uapi problem). TTM has > + improved a lot the past 2 years, there's no reason anymore not to use it. > + > +- Come up with a plan what to do with drm/scheduler and how to get there. > + > +- There's a lot of complexity added past few years to make relocations faster. > + That doesn't make sense given hw and gpu apis moved away from this model years > + ago: > + 1. Land a modern pre-bound uapi like VM_BIND > + 2. Any complexity added in this area past few years which can't be justified > + with VM_BIND using userspace should be removed. Looking at amdgpu dma_resv on > + the bo and vm, plus some lru locks is all that needed. No complex rcu, > + refcounts, caching, ... on everything. > + This is the matching task on the vm side compared to ttm/dma_resv on the > + backing storage side. > + > +- i915_sw_fence seems to be the main structure for the i915-gem dma_fence model. > + How-to-dma_fence is core and drivers really shouldn't build their own world > + here, treating everything else as a fixed platform. i915_sw_fence concepts > + should be moved to dma_fence, drm/scheduler or atomic commit helpers. Or > + removed if dri-devel consensus is that it's not a good idea. Once that's done > + maybe even remove it if there's nothing left. > + > +Smaller things: > +- i915_utils.h needs to be moved to the right places. > + > +- dma_fence_work should be in drivers/dma-buf > + > +- i915_mm.c should be moved to the right places. Some of the helpers also look a > + bit fishy: > + > + https://lore.kernel.org/linux-mm/20210301083320.943079-1-hch@xxxxxx/ -- Jani Nikula, Intel Open Source Graphics Center _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
