diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2013-10-10 22:16:53 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2013-10-10 22:19:44 +0100 |
| commit | 3e3af6936ea26be57e80e09752a8736c9cfe2566 (patch) | |
| tree | 00c70e5452606b70dabecb0a2dc8a192f62f28d6 | |
| parent | f0bd716425d1514b62565f9a65397cd1cb2ffb3a (diff) | |
sna: Populate bo->size from dma-buf
Recent kernels gained the ability to report the actual size of the
dma-buf through an lseek. We can use this to set the correct size of the
bo when available, overriding the guess provided by the caller.
Suggested-by: Kristian Høgsberg <krh@bitplanet.net>
Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
| -rw-r--r-- | src/sna/kgem.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/sna/kgem.c b/src/sna/kgem.c index 3dcc6142..dbcd1428 100644 --- a/src/sna/kgem.c +++ b/src/sna/kgem.c @@ -3554,6 +3554,7 @@ struct kgem_bo *kgem_create_for_prime(struct kgem *kgem, int name, uint32_t size struct drm_prime_handle args; struct drm_i915_gem_get_tiling tiling; struct kgem_bo *bo; + off_t seek; DBG(("%s(name=%d)\n", __FUNCTION__, name)); @@ -3573,6 +3574,11 @@ struct kgem_bo *kgem_create_for_prime(struct kgem *kgem, int name, uint32_t size return NULL; } + /* Query actual size, overriding specified if available */ + seek = lseek(args.fd, 0, SEEK_END); + if (seek != -1) + size = seek; + DBG(("%s: new handle=%d, tiling=%d\n", __FUNCTION__, args.handle, tiling.tiling_mode)); bo = __kgem_bo_alloc(args.handle, NUM_PAGES(size)); |