nouveau: be more careful about freeing temporary transfer buffers

Deleting a buffer does not flush the command stream. Make sure that we
wait for the copies to finish before deleting the temporary bo.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: mesa-stable@lists.freedesktop.org
Tested-by: Marcin Ślusarz <marcin.slusarz@gmail.com>

5 files changed, 30 insertions, 4 deletions

diff --git a/src/gallium/drivers/nouveau/nouveau_fence.c b/src/gallium/drivers/nouveau/nouveau_fence.c
index abcdb47..ee4e08d 100644
--- a/src/gallium/drivers/nouveau/nouveau_fence.c
+++ b/src/gallium/drivers/nouveau/nouveau_fence.c
@@ -231,3 +231,11 @@ nouveau_fence_next(struct nouveau_screen *screen)
 
    nouveau_fence_new(screen, &screen->fence.current, false);
 }
+
+void
+nouveau_fence_unref_bo(void *data)
+{
+   struct nouveau_bo *bo = data;
+
+   nouveau_bo_ref(NULL, &bo);
+}
diff --git a/src/gallium/drivers/nouveau/nouveau_fence.h b/src/gallium/drivers/nouveau/nouveau_fence.h
index a158705..2efcab2 100644
--- a/src/gallium/drivers/nouveau/nouveau_fence.h
+++ b/src/gallium/drivers/nouveau/nouveau_fence.h
@@ -37,6 +37,9 @@ void nouveau_fence_next(struct nouveau_screen *);
 bool nouveau_fence_wait(struct nouveau_fence *);
 bool nouveau_fence_signalled(struct nouveau_fence *);
 
+void nouveau_fence_unref_bo(void *data); /* generic unref bo callback */
+
+
 static inline void
 nouveau_fence_ref(struct nouveau_fence *fence, struct nouveau_fence **ref)
 {
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_miptree.c b/src/gallium/drivers/nouveau/nv30/nv30_miptree.c
index 735c718..c6f6965 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_miptree.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_miptree.c
@@ -339,10 +339,15 @@ nv30_miptree_transfer_unmap(struct pipe_context *pipe,
    struct nv30_context *nv30 = nv30_context(pipe);
    struct nv30_transfer *tx = nv30_transfer(ptx);
 
-   if (ptx->usage & PIPE_TRANSFER_WRITE)
+   if (ptx->usage & PIPE_TRANSFER_WRITE) {
       nv30_transfer_rect(nv30, NEAREST, &tx->tmp, &tx->img);
 
-   nouveau_bo_ref(NULL, &tx->tmp.bo);
+      /* Allow the copies above to finish executing before freeing the source */
+      nouveau_fence_work(nv30->screen->base.fence.current,
+                         nouveau_fence_unref_bo, tx->tmp.bo);
+   } else {
+      nouveau_bo_ref(NULL, &tx->tmp.bo);
+   }
    pipe_resource_reference(&ptx->resource, NULL);
    FREE(tx);
 }
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_transfer.c b/src/gallium/drivers/nouveau/nv50/nv50_transfer.c
index fc6b24aa..be51407 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_transfer.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_transfer.c
@@ -365,9 +365,14 @@ nv50_miptree_transfer_unmap(struct pipe_context *pctx,
             tx->rect[0].base += mt->layer_stride;
          tx->rect[1].base += tx->nblocksy * tx->base.stride;
       }
+
+      /* Allow the copies above to finish executing before freeing the source */
+      nouveau_fence_work(nv50->screen->base.fence.current,
+                         nouveau_fence_unref_bo, tx->rect[1].bo);
+   } else {
+      nouveau_bo_ref(NULL, &tx->rect[1].bo);
    }
 
-   nouveau_bo_ref(NULL, &tx->rect[1].bo);
    pipe_resource_reference(&transfer->resource, NULL);
 
    FREE(tx);
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_transfer.c b/src/gallium/drivers/nouveau/nvc0/nvc0_transfer.c
index d4831bf..aaec60a 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_transfer.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_transfer.c
@@ -495,11 +495,16 @@ nvc0_miptree_transfer_unmap(struct pipe_context *pctx,
          tx->rect[1].base += tx->nblocksy * tx->base.stride;
       }
       NOUVEAU_DRV_STAT(&nvc0->screen->base, tex_transfers_wr, 1);
+
+      /* Allow the copies above to finish executing before freeing the source */
+      nouveau_fence_work(nvc0->screen->base.fence.current,
+                         nouveau_fence_unref_bo, tx->rect[1].bo);
+   } else {
+      nouveau_bo_ref(NULL, &tx->rect[1].bo);
    }
    if (tx->base.usage & PIPE_TRANSFER_READ)
       NOUVEAU_DRV_STAT(&nvc0->screen->base, tex_transfers_rd, 1);
 
-   nouveau_bo_ref(NULL, &tx->rect[1].bo);
    pipe_resource_reference(&transfer->resource, NULL);
 
    FREE(tx);