From b2dbf8d982a4f02a00261a5f8f75d2f0bf765de4 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Fri, 21 Jun 2019 22:57:33 +0100 Subject: [PATCH] drm/i915/blt: Remove recursive vma->lock As we have already plugged the w->dma into the reservation_object, and have set ourselves up to automatically signal the request and w->dma on completion, we do not need to export the rq->fence directly and just use the w->dma fence. This avoids having to take the reservation_lock inside the worker which cross-release lockdep would complain about. :) Signed-off-by: Chris Wilson Cc: Matthew Auld Reviewed-by: Matthew Auld Link: https://patchwork.freedesktop.org/patch/msgid/20190621215733.12070-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/gem/i915_gem_client_blt.c | 14 +++++++------- .../drm/i915/gem/selftests/i915_gem_client_blt.c | 11 ----------- 2 files changed, 7 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c b/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c index 1fdab0767a47..9b01c3b5b31d 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c @@ -72,7 +72,6 @@ static struct i915_sleeve *create_sleeve(struct i915_address_space *vm, vma->ops = &proxy_vma_ops; sleeve->vma = vma; - sleeve->obj = i915_gem_object_get(obj); sleeve->pages = pages; sleeve->page_sizes = *page_sizes; @@ -85,7 +84,6 @@ static struct i915_sleeve *create_sleeve(struct i915_address_space *vm, static void destroy_sleeve(struct i915_sleeve *sleeve) { - i915_gem_object_put(sleeve->obj); kfree(sleeve); } @@ -155,7 +153,7 @@ static void clear_pages_worker(struct work_struct *work) { struct clear_pages_work *w = container_of(work, typeof(*w), work); struct drm_i915_private *i915 = w->ce->gem_context->i915; - struct drm_i915_gem_object *obj = w->sleeve->obj; + struct drm_i915_gem_object *obj = w->sleeve->vma->obj; struct i915_vma *vma = w->sleeve->vma; struct i915_request *rq; int err = w->dma.error; @@ -193,10 +191,12 @@ static void clear_pages_worker(struct work_struct *work) goto out_request; } - /* XXX: more feverish nightmares await */ - i915_vma_lock(vma); - err = i915_vma_move_to_active(vma, rq, EXEC_OBJECT_WRITE); - i915_vma_unlock(vma); + /* + * w->dma is already exported via (vma|obj)->resv we need only + * keep track of the GPU activity within this vma/request, and + * propagate the signal from the request to w->dma. + */ + err = i915_active_ref(&vma->active, rq->fence.context, rq); if (err) goto out_request; diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_client_blt.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_client_blt.c index f3a5eb807c1c..855481252bda 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_client_blt.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_client_blt.c @@ -63,17 +63,6 @@ static int igt_client_fill(void *arg) if (err) goto err_unpin; - /* - * XXX: For now do the wait without the object resv lock to - * ensure we don't deadlock. - */ - err = i915_gem_object_wait(obj, - I915_WAIT_INTERRUPTIBLE | - I915_WAIT_ALL, - MAX_SCHEDULE_TIMEOUT); - if (err) - goto err_unpin; - i915_gem_object_lock(obj); err = i915_gem_object_set_to_cpu_domain(obj, false); i915_gem_object_unlock(obj); -- 2.45.2