Re: [PATCH v3 1/4] drm/ttm: Create pinned list

[Christian König <ckoenig.leichtzumerken@xxxxxxxxx>]

Am 30.08.21 um 16:16 schrieb Andrey Grodzovsky:
> On 2021-08-30 4:58 a.m., Christian König wrote:
> > Am 27.08.21 um 22:39 schrieb Andrey Grodzovsky:
> > > This list will be used to capture all non VRAM BOs not
> > > on LRU so when device is hot unplugged we can iterate
> > > the list and unmap DMA mappings before device is removed.
> > >
> > > v2: Reanme function to ttm_bo_move_to_pinned
> > > v3: Move the pinned list to ttm device
> >
> > As far as I can see there is not list_del() remaining. So this won't 
> > work correctly.
>
>
> It's in ttm_bo_release, there was no code change there hence it's not 
> captured in the patch.

Ah! So you keep the logic as is there. Sorry totally missed that.

In this case the patch is Reviewed-by: Christian König 
<christian.koenig@xxxxxxx>

Can you push this to drm-misc-next?

Thanks,
Christian.

> Andrey
>
>
> > I suggest to rather rebase on top of the stuff I'm working on for a 
> > while to move the LRU into the resource instead.
> >
> > Just send out the latest patch set of this with you in CC.
> >
> > Christian.
> >
> > > Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
> > > Suggested-by: Christian König <christian.koenig@xxxxxxx>
> > > ---
> > >   drivers/gpu/drm/ttm/ttm_bo.c     | 18 ++++++++++++++----
> > >   drivers/gpu/drm/ttm/ttm_device.c |  1 +
> > >   include/drm/ttm/ttm_device.h     |  1 +
> > >   3 files changed, 16 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/ttm/ttm_bo.c 
> > > b/drivers/gpu/drm/ttm/ttm_bo.c
> > > index 1b950b45cf4b..1fedd0eb67ba 100644
> > > --- a/drivers/gpu/drm/ttm/ttm_bo.c
> > > +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> > > @@ -69,7 +69,17 @@ static void ttm_bo_mem_space_debug(struct 
> > > ttm_buffer_object *bo,
> > >       }
> > >   }
> > >   -static void ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
> > > +static inline void ttm_bo_move_to_pinned(struct ttm_buffer_object *bo)
> > > +{
> > > +    struct ttm_device *bdev = bo->bdev;
> > > +
> > > +    list_move_tail(&bo->lru, &bdev->pinned);
> > > +
> > > +    if (bdev->funcs->del_from_lru_notify)
> > > +        bdev->funcs->del_from_lru_notify(bo);
> > > +}
> > > +
> > > +static inline void ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
> > >   {
> > >       struct ttm_device *bdev = bo->bdev;
> > >   @@ -98,7 +108,7 @@ void ttm_bo_move_to_lru_tail(struct 
> > > ttm_buffer_object *bo,
> > >           dma_resv_assert_held(bo->base.resv);
> > >         if (bo->pin_count) {
> > > -        ttm_bo_del_from_lru(bo);
> > > +        ttm_bo_move_to_pinned(bo);
> > >           return;
> > >       }
> > >   @@ -339,7 +349,7 @@ static int ttm_bo_cleanup_refs(struct 
> > > ttm_buffer_object *bo,
> > >           return ret;
> > >       }
> > >   -    ttm_bo_del_from_lru(bo);
> > > +    ttm_bo_move_to_pinned(bo);
> > >       list_del_init(&bo->ddestroy);
> > >       spin_unlock(&bo->bdev->lru_lock);
> > >       ttm_bo_cleanup_memtype_use(bo);
> > > @@ -1154,7 +1164,7 @@ int ttm_bo_swapout(struct ttm_buffer_object 
> > > *bo, struct ttm_operation_ctx *ctx,
> > >           return 0;
> > >       }
> > >   -    ttm_bo_del_from_lru(bo);
> > > +    ttm_bo_move_to_pinned(bo);
> > >       /* TODO: Cleanup the locking */
> > >       spin_unlock(&bo->bdev->lru_lock);
> > >   diff --git a/drivers/gpu/drm/ttm/ttm_device.c 
> > > b/drivers/gpu/drm/ttm/ttm_device.c
> > > index 5f31acec3ad7..530a9c36be37 100644
> > > --- a/drivers/gpu/drm/ttm/ttm_device.c
> > > +++ b/drivers/gpu/drm/ttm/ttm_device.c
> > > @@ -208,6 +208,7 @@ int ttm_device_init(struct ttm_device *bdev, 
> > > struct ttm_device_funcs *funcs,
> > >       INIT_DELAYED_WORK(&bdev->wq, ttm_device_delayed_workqueue);
> > >       spin_lock_init(&bdev->lru_lock);
> > >       INIT_LIST_HEAD(&bdev->ddestroy);
> > > +    INIT_LIST_HEAD(&bdev->pinned);
> > >       bdev->dev_mapping = mapping;
> > >       mutex_lock(&ttm_global_mutex);
> > >       list_add_tail(&bdev->device_list, &glob->device_list);
> > > diff --git a/include/drm/ttm/ttm_device.h 
> > > b/include/drm/ttm/ttm_device.h
> > > index cd592f8e941b..03fb44d061e0 100644
> > > --- a/include/drm/ttm/ttm_device.h
> > > +++ b/include/drm/ttm/ttm_device.h
> > > @@ -265,6 +265,7 @@ struct ttm_device {
> > >        */
> > >       spinlock_t lru_lock;
> > >       struct list_head ddestroy;
> > > +    struct list_head pinned;
> > >         /*
> > >        * Protected by load / firstopen / lastclose /unload sync.