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panfrost: Don't return imported/exported BOs to the cache

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We don't know who else is using the BO in that case, and thus shouldn't
re-use it for something else.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Boris Brezillon 2019-09-14 11:46:44 +02:00
parent 90b8934547
commit 9af4aeaaf7
2 changed files with 9 additions and 0 deletions
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5
src/gallium/drivers/panfrost/pan_bo.c
View file

@ -182,6 +182,9 @@ panfrost_bo_cache_put(struct panfrost_bo *bo)
{
struct panfrost_screen *screen = bo->screen;
if (bo->flags & PAN_BO_DONT_REUSE)
return false;
pthread_mutex_lock(&screen->bo_cache_lock);
struct list_head *bucket = pan_bucket(screen, bo->size);
struct drm_panfrost_madvise madv;
@ -352,6 +355,7 @@ panfrost_bo_import(struct panfrost_screen *screen, int fd)
bo->gem_handle = gem_handle;
bo->gpu = (mali_ptr) get_bo_offset.offset;
bo->size = lseek(fd, 0, SEEK_END);
bo->flags |= PAN_BO_DONT_REUSE;
assert(bo->size > 0);
pipe_reference_init(&bo->reference, 1);
@ -372,6 +376,7 @@ panfrost_bo_export(struct panfrost_bo *bo)
if (ret == -1)
return -1;
bo->flags |= PAN_BO_DONT_REUSE;
return args.fd;
}

4
src/gallium/drivers/panfrost/pan_bo.h
View file

@ -52,6 +52,10 @@ struct panfrost_screen;
* (semantically distinct from INVISIBLE, which cannot never be mmaped) */
#define PAN_BO_DELAY_MMAP (1 << 4)
/* Some BOs shouldn't be returned back to the reuse BO cache, use this flag to
* let the BO logic know about this contraint. */
#define PAN_BO_DONT_REUSE (1 << 5)
struct panfrost_bo {
/* Must be first for casting */
struct list_head link;