From 7f2a0b50b2b20308a19602b51c647566c62e144c Mon Sep 17 00:00:00 2001 From: Danilo Krummrich Date: Fri, 4 Aug 2023 20:23:47 +0200 Subject: drm/nouveau: fence: separate fence alloc and emit The new (VM_BIND) UAPI exports DMA fences through DRM syncobjs. Hence, in order to emit fences within DMA fence signalling critical sections (e.g. as typically done in the DRM GPU schedulers run_job() callback) we need to separate fence allocation and fence emitting. Reviewed-by: Dave Airlie Signed-off-by: Danilo Krummrich Link: https://patchwork.freedesktop.org/patch/msgid/20230804182406.5222-8-dakr@redhat.com --- drivers/gpu/drm/nouveau/nouveau_dmem.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'drivers/gpu/drm/nouveau/nouveau_dmem.c') diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c index 789857faa048..4ad40e42cae1 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dmem.c +++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c @@ -209,7 +209,8 @@ static vm_fault_t nouveau_dmem_migrate_to_ram(struct vm_fault *vmf) goto done; } - nouveau_fence_new(dmem->migrate.chan, false, &fence); + if (!nouveau_fence_new(&fence)) + nouveau_fence_emit(fence, dmem->migrate.chan); migrate_vma_pages(&args); nouveau_dmem_fence_done(&fence); dma_unmap_page(drm->dev->dev, dma_addr, PAGE_SIZE, DMA_BIDIRECTIONAL); @@ -402,7 +403,8 @@ nouveau_dmem_evict_chunk(struct nouveau_dmem_chunk *chunk) } } - nouveau_fence_new(chunk->drm->dmem->migrate.chan, false, &fence); + if (!nouveau_fence_new(&fence)) + nouveau_fence_emit(fence, chunk->drm->dmem->migrate.chan); migrate_device_pages(src_pfns, dst_pfns, npages); nouveau_dmem_fence_done(&fence); migrate_device_finalize(src_pfns, dst_pfns, npages); @@ -675,7 +677,8 @@ static void nouveau_dmem_migrate_chunk(struct nouveau_drm *drm, addr += PAGE_SIZE; } - nouveau_fence_new(drm->dmem->migrate.chan, false, &fence); + if (!nouveau_fence_new(&fence)) + nouveau_fence_emit(fence, chunk->drm->dmem->migrate.chan); migrate_vma_pages(args); nouveau_dmem_fence_done(&fence); nouveau_pfns_map(svmm, args->vma->vm_mm, args->start, pfns, i); -- cgit v1.2.3