[Mesa-dev] [PATCH v2 23/37] panfrost: Make panfrost_batch->bos a hash table

[Alyssa Rosenzweig]

What if flags = 0?

On Mon, Sep 16, 2019 at 11:37:01AM +0200, Boris Brezillon wrote:
> So we can store the flags as data and keep the BO as a key. This way
> we keep track of the type of access done on BOs.
> 
> Signed-off-by: Boris Brezillon <boris.brezillon at collabora.com>
> ---
>  src/gallium/drivers/panfrost/pan_job.c | 33 +++++++++++++++++---------
>  src/gallium/drivers/panfrost/pan_job.h |  2 +-
>  2 files changed, 23 insertions(+), 12 deletions(-)
> 
> diff --git a/src/gallium/drivers/panfrost/pan_job.c b/src/gallium/drivers/panfrost/pan_job.c
> index 6332529b2f9b..739f36a593f1 100644
> --- a/src/gallium/drivers/panfrost/pan_job.c
> +++ b/src/gallium/drivers/panfrost/pan_job.c
> @@ -44,9 +44,8 @@ panfrost_create_batch(struct panfrost_context *ctx,
>  
>          batch->ctx = ctx;
>  
> -        batch->bos = _mesa_set_create(batch,
> -                                      _mesa_hash_pointer,
> -                                      _mesa_key_pointer_equal);
> +        batch->bos = _mesa_hash_table_create(batch, _mesa_hash_pointer,
> +                                             _mesa_key_pointer_equal);
>  
>          batch->minx = batch->miny = ~0;
>          batch->maxx = batch->maxy = 0;
> @@ -67,10 +66,8 @@ panfrost_free_batch(struct panfrost_batch *batch)
>  
>          struct panfrost_context *ctx = batch->ctx;
>  
> -        set_foreach(batch->bos, entry) {
> -                struct panfrost_bo *bo = (struct panfrost_bo *)entry->key;
> -                panfrost_bo_unreference(bo);
> -        }
> +        hash_table_foreach(batch->bos, entry)
> +                panfrost_bo_unreference((struct panfrost_bo *)entry->key);
>  
>          _mesa_hash_table_remove_key(ctx->batches, &batch->key);
>  
> @@ -138,11 +135,25 @@ panfrost_batch_add_bo(struct panfrost_batch *batch, struct panfrost_bo *bo,
>          if (!bo)
>                  return;
>  
> -        if (_mesa_set_search(batch->bos, bo))
> +        struct hash_entry *entry;
> +        uint32_t old_flags = 0;
> +
> +        entry = _mesa_hash_table_search(batch->bos, bo);
> +        if (!entry) {
> +                entry = _mesa_hash_table_insert(batch->bos, bo,
> +                                                (void *)(uintptr_t)flags);
> +                panfrost_bo_reference(bo);
> +	} else {
> +                old_flags = (uintptr_t)entry->data;
> +        }
> +
> +        assert(entry);
> +
> +        if (old_flags == flags)
>                  return;
>  
> -        panfrost_bo_reference(bo);
> -        _mesa_set_add(batch->bos, bo);
> +        flags |= old_flags;
> +        entry->data = (void *)(uintptr_t)flags;
>  }
>  
>  void panfrost_batch_add_fbo_bos(struct panfrost_batch *batch)
> @@ -376,7 +387,7 @@ panfrost_batch_submit_ioctl(struct panfrost_batch *batch,
>          bo_handles = calloc(batch->bos->entries, sizeof(*bo_handles));
>          assert(bo_handles);
>  
> -        set_foreach(batch->bos, entry) {
> +        hash_table_foreach(batch->bos, entry) {
>                  struct panfrost_bo *bo = (struct panfrost_bo *)entry->key;
>                  assert(bo->gem_handle > 0);
>                  bo_handles[submit.bo_handle_count++] = bo->gem_handle;
> diff --git a/src/gallium/drivers/panfrost/pan_job.h b/src/gallium/drivers/panfrost/pan_job.h
> index 0b37a3131e86..3f2cf1a999f3 100644
> --- a/src/gallium/drivers/panfrost/pan_job.h
> +++ b/src/gallium/drivers/panfrost/pan_job.h
> @@ -98,7 +98,7 @@ struct panfrost_batch {
>          unsigned job_index;
>  
>          /* BOs referenced -- will be used for flushing logic */
> -        struct set *bos;
> +        struct hash_table *bos;
>  
>          /* Current transient BO */
>  	struct panfrost_bo *transient_bo;
> -- 
> 2.21.0