From ec8d985ff26f29d53d9ebff04973e96572fd0285 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christian=20K=C3=B6nig?= Date: Wed, 4 May 2022 13:34:03 +0200 Subject: drm: use dma_fence_unwrap_merge() in drm_syncobj MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The unwrap merge function is now intended for this use case. Signed-off-by: Christian König Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20220518135844.3338-6-christian.koenig@amd.com --- drivers/gpu/drm/drm_syncobj.c | 57 ++++++------------------------------------- 1 file changed, 7 insertions(+), 50 deletions(-) (limited to 'drivers/gpu/drm/drm_syncobj.c') diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c index 7e48dcd1bee4..bbad9e4696e7 100644 --- a/drivers/gpu/drm/drm_syncobj.c +++ b/drivers/gpu/drm/drm_syncobj.c @@ -184,6 +184,7 @@ */ #include +#include #include #include #include @@ -853,57 +854,12 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data, &args->handle); } - -/* - * Try to flatten a dma_fence_chain into a dma_fence_array so that it can be - * added as timeline fence to a chain again. - */ -static int drm_syncobj_flatten_chain(struct dma_fence **f) -{ - struct dma_fence_chain *chain = to_dma_fence_chain(*f); - struct dma_fence *tmp, **fences; - struct dma_fence_array *array; - unsigned int count; - - if (!chain) - return 0; - - count = 0; - dma_fence_chain_for_each(tmp, &chain->base) - ++count; - - fences = kmalloc_array(count, sizeof(*fences), GFP_KERNEL); - if (!fences) - return -ENOMEM; - - count = 0; - dma_fence_chain_for_each(tmp, &chain->base) - fences[count++] = dma_fence_get(tmp); - - array = dma_fence_array_create(count, fences, - dma_fence_context_alloc(1), - 1, false); - if (!array) - goto free_fences; - - dma_fence_put(*f); - *f = &array->base; - return 0; - -free_fences: - while (count--) - dma_fence_put(fences[count]); - - kfree(fences); - return -ENOMEM; -} - static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private, struct drm_syncobj_transfer *args) { struct drm_syncobj *timeline_syncobj = NULL; + struct dma_fence *fence, *tmp; struct dma_fence_chain *chain; - struct dma_fence *fence; int ret; timeline_syncobj = drm_syncobj_find(file_private, args->dst_handle); @@ -912,13 +868,14 @@ static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private, } ret = drm_syncobj_find_fence(file_private, args->src_handle, args->src_point, args->flags, - &fence); + &tmp); if (ret) goto err_put_timeline; - ret = drm_syncobj_flatten_chain(&fence); - if (ret) - goto err_free_fence; + fence = dma_fence_unwrap_merge(tmp); + dma_fence_put(tmp); + if (!fence) + goto err_put_timeline; chain = dma_fence_chain_alloc(); if (!chain) { -- cgit v1.2.3