Re: [PATCH 11/13] drm/nouveau: switch the TTM backends to self alloc

[Matthew Auld <matthew.william.auld@gmail.com>]

On Mon, 3 May 2021 at 12:14, Christian König
<ckoenig.leichtzumerken@gmail.com> wrote:
>
> Am 30.04.21 um 17:02 schrieb Matthew Auld:
> > On Fri, 30 Apr 2021 at 10:25, Christian König
> > <ckoenig.leichtzumerken@gmail.com> wrote:
> >> Similar to the TTM range manager.
> >>
> >> Signed-off-by: Christian König <christian.koenig@amd.com>
> >> ---
> >>   drivers/gpu/drm/nouveau/nouveau_mem.h | 1 +
> >>   drivers/gpu/drm/nouveau/nouveau_ttm.c | 4 ++++
> >>   2 files changed, 5 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.h b/drivers/gpu/drm/nouveau/nouveau_mem.h
> >> index 7df3848e85aa..3a6a1be2ed52 100644
> >> --- a/drivers/gpu/drm/nouveau/nouveau_mem.h
> >> +++ b/drivers/gpu/drm/nouveau/nouveau_mem.h
> >> @@ -13,6 +13,7 @@ nouveau_mem(struct ttm_resource *reg)
> >>   }
> >>
> >>   struct nouveau_mem {
> >> +       struct ttm_resource base;
> >>          struct nouveau_cli *cli;
> >>          u8 kind;
> >>          u8 comp;
> >> diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
> >> index 15c7627f8f58..5e5ce2ec89f0 100644
> >> --- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
> >> +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
> >> @@ -59,6 +59,8 @@ nouveau_vram_manager_new(struct ttm_resource_manager *man,
> >>          if (ret)
> >>                  return ret;
> >>
> >> +       ttm_resource_init(bo, place, reg->mm_node);
> >> +
> > What happened here? I assume this needs to be nouveau_mem.base not the mm_node?
>
> Same like the other backends I'm first changing the allocation so that
> we allocate ttm_resource and the private housekeeping together and then
> flip the switch in the last patch.
>
> So reg->mm_node is temporary pointing to the ttm_resource object until
> it is removed in the last patch.

Ok, makes sense,
Reviewed-by: Matthew Auld <matthew.auld@intel.com>

>
> Christian.
>
> >
> >>          ret = nouveau_mem_vram(reg, nvbo->contig, nvbo->page);
> >>          if (ret) {
> >>                  nouveau_mem_del(reg);
> >> @@ -87,6 +89,7 @@ nouveau_gart_manager_new(struct ttm_resource_manager *man,
> >>          if (ret)
> >>                  return ret;
> >>
> >> +       ttm_resource_init(bo, place, reg->mm_node);
> >>          reg->start = 0;
> >>          return 0;
> >>   }
> >> @@ -112,6 +115,7 @@ nv04_gart_manager_new(struct ttm_resource_manager *man,
> >>          if (ret)
> >>                  return ret;
> >>
> >> +       ttm_resource_init(bo, place, reg->mm_node);
> >>          ret = nvif_vmm_get(&mem->cli->vmm.vmm, PTES, false, 12, 0,
> >>                             (long)reg->num_pages << PAGE_SHIFT, &mem->vma[0]);
> >>          if (ret) {
> >> --
> >> 2.25.1
> >>
>
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