[24/41] drm/i915: Use lockless object free

Submitted by Chris Wilson on Oct. 14, 2016, 12:18 p.m.

Details

Message ID 20161014121833.439-25-chris@chris-wilson.co.uk
State New
Headers show
Series "Series without cover letter" ( rev: 1 ) in Intel GFX

Browsing this patch as part of:
"Series without cover letter" rev 1 in Intel GFX
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Commit Message

Chris Wilson Oct. 14, 2016, 12:18 p.m.
Having moved the locked phase of freeing an object to a separate worker,
we can now declare to the core that we only need the unlocked variant of
driver->gem_free_object, and can use the simple unreference internally.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_drv.c         |  2 +-
 drivers/gpu/drm/i915/i915_drv.h         | 10 +---------
 drivers/gpu/drm/i915/i915_gem.c         | 20 ++++++++++----------
 drivers/gpu/drm/i915/i915_gem_tiling.c  |  2 +-
 drivers/gpu/drm/i915/i915_gem_userptr.c |  4 ++--
 drivers/gpu/drm/i915/intel_display.c    |  6 +++---
 drivers/gpu/drm/i915/intel_overlay.c    |  4 ++--
 drivers/gpu/drm/i915/intel_pm.c         |  2 +-
 8 files changed, 21 insertions(+), 29 deletions(-)

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diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index c46f96d8bb38..53469811fb46 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -2569,7 +2569,7 @@  static struct drm_driver driver = {
 	.set_busid = drm_pci_set_busid,
 
 	.gem_close_object = i915_gem_close_object,
-	.gem_free_object = i915_gem_free_object,
+	.gem_free_object_unlocked = i915_gem_free_object,
 	.gem_vm_ops = &i915_gem_vm_ops,
 
 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e2fe50b6b493..b6192aca57ec 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2391,19 +2391,12 @@  __attribute__((nonnull))
 static inline void
 i915_gem_object_put(struct drm_i915_gem_object *obj)
 {
-	drm_gem_object_unreference(&obj->base);
+	__drm_gem_object_unreference(&obj->base);
 }
 
 __deprecated
 extern void drm_gem_object_unreference(struct drm_gem_object *);
 
-__attribute__((nonnull))
-static inline void
-i915_gem_object_put_unlocked(struct drm_i915_gem_object *obj)
-{
-	drm_gem_object_unreference_unlocked(&obj->base);
-}
-
 __deprecated
 extern void drm_gem_object_unreference_unlocked(struct drm_gem_object *);
 
@@ -2498,7 +2491,6 @@  static inline struct i915_vma *i915_vma_get(struct i915_vma *vma)
 
 static inline void i915_vma_put(struct i915_vma *vma)
 {
-	lockdep_assert_held(&vma->vm->dev->struct_mutex);
 	i915_gem_object_put(vma->obj);
 }
 
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index c0cb1a482a67..a3e39f412a87 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -616,7 +616,7 @@  i915_gem_create(struct drm_file *file,
 
 	ret = drm_gem_handle_create(file, &obj->base, &handle);
 	/* drop reference from allocate - handle holds it now */
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	if (ret)
 		return ret;
 
@@ -1114,7 +1114,7 @@  i915_gem_pread_ioctl(struct drm_device *dev, void *data,
 
 	i915_gem_object_unpin_pages(obj);
 out:
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	return ret;
 }
 
@@ -1452,7 +1452,7 @@  i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
 
 	i915_gem_object_unpin_pages(obj);
 err:
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	return ret;
 }
 
@@ -1562,7 +1562,7 @@  i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
 out_pages:
 	i915_gem_object_unpin_pages(obj);
 out_unlocked:
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	return err;
 }
 
@@ -1593,7 +1593,7 @@  i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
 		}
 	}
 
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	return err;
 }
 
@@ -1639,7 +1639,7 @@  i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
 	 * pages from.
 	 */
 	if (!obj->base.filp) {
-		i915_gem_object_put_unlocked(obj);
+		i915_gem_object_put(obj);
 		return -EINVAL;
 	}
 
@@ -1651,7 +1651,7 @@  i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
 		struct vm_area_struct *vma;
 
 		if (down_write_killable(&mm->mmap_sem)) {
-			i915_gem_object_put_unlocked(obj);
+			i915_gem_object_put(obj);
 			return -EINTR;
 		}
 		vma = find_vma(mm, addr);
@@ -1665,7 +1665,7 @@  i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
 		/* This may race, but that's ok, it only gets set */
 		WRITE_ONCE(obj->frontbuffer_ggtt_origin, ORIGIN_CPU);
 	}
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	if (IS_ERR((void *)addr))
 		return addr;
 
@@ -2117,7 +2117,7 @@  i915_gem_mmap_gtt(struct drm_file *file,
 	if (ret == 0)
 		*offset = drm_vma_node_offset_addr(&obj->base.vma_node);
 
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	return ret;
 }
 
@@ -2944,7 +2944,7 @@  i915_gem_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 			args->timeout_ns = 0;
 	}
 
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	return ret;
 }
 
diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i915/i915_gem_tiling.c
index c63a9cf4da33..6395e62bd9e4 100644
--- a/drivers/gpu/drm/i915/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/i915_gem_tiling.c
@@ -201,7 +201,7 @@  i915_gem_set_tiling(struct drm_device *dev, void *data,
 
 	if (!i915_tiling_ok(dev,
 			    args->stride, obj->base.size, args->tiling_mode)) {
-		i915_gem_object_put_unlocked(obj);
+		i915_gem_object_put(obj);
 		return -EINVAL;
 	}
 
diff --git a/drivers/gpu/drm/i915/i915_gem_userptr.c b/drivers/gpu/drm/i915/i915_gem_userptr.c
index 136c493b15b2..6f7ac0e783ec 100644
--- a/drivers/gpu/drm/i915/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/i915_gem_userptr.c
@@ -542,7 +542,7 @@  __i915_gem_userptr_get_pages_worker(struct work_struct *_work)
 	release_pages(pvec, pinned, 0);
 	drm_free_large(pvec);
 
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	put_task_struct(work->task);
 	kfree(work);
 }
@@ -802,7 +802,7 @@  i915_gem_userptr_ioctl(struct drm_device *dev, void *data, struct drm_file *file
 		ret = drm_gem_handle_create(file, &obj->base, &handle);
 
 	/* drop reference from allocate - handle holds it now */
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	if (ret)
 		return ret;
 
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 07409565563d..26b6ad03f84a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11033,7 +11033,7 @@  intel_framebuffer_create_for_mode(struct drm_device *dev,
 
 	fb = intel_framebuffer_create(dev, &mode_cmd, obj);
 	if (IS_ERR(fb))
-		i915_gem_object_put_unlocked(obj);
+		i915_gem_object_put(obj);
 
 	return fb;
 }
@@ -12338,7 +12338,7 @@  cleanup:
 	crtc->primary->fb = old_fb;
 	update_state_fb(crtc->primary);
 
-	i915_gem_object_put_unlocked(obj);
+	i915_gem_object_put(obj);
 	drm_framebuffer_unreference(work->old_fb);
 
 	spin_lock_irq(&dev->event_lock);
@@ -15852,7 +15852,7 @@  intel_user_framebuffer_create(struct drm_device *dev,
 
 	fb = intel_framebuffer_create(dev, &mode_cmd, obj);
 	if (IS_ERR(fb))
-		i915_gem_object_put_unlocked(obj);
+		i915_gem_object_put(obj);
 
 	return fb;
 }
diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index 25bcd4a178d3..fd0e4dac7cc1 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -1222,7 +1222,7 @@  int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
 out_unlock:
 	mutex_unlock(&dev->struct_mutex);
 	drm_modeset_unlock_all(dev);
-	i915_gem_object_put_unlocked(new_bo);
+	i915_gem_object_put(new_bo);
 out_free:
 	kfree(params);
 
@@ -1466,7 +1466,7 @@  void intel_cleanup_overlay(struct drm_i915_private *dev_priv)
 	 * hardware should be off already */
 	WARN_ON(dev_priv->overlay->active);
 
-	i915_gem_object_put_unlocked(dev_priv->overlay->reg_bo);
+	i915_gem_object_put(dev_priv->overlay->reg_bo);
 	kfree(dev_priv->overlay);
 }
 
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a96217c840b5..b090fce18f73 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5879,7 +5879,7 @@  static void valleyview_cleanup_pctx(struct drm_i915_private *dev_priv)
 	if (WARN_ON(!dev_priv->vlv_pctx))
 		return;
 
-	i915_gem_object_put_unlocked(dev_priv->vlv_pctx);
+	i915_gem_object_put(dev_priv->vlv_pctx);
 	dev_priv->vlv_pctx = NULL;
 }
 

Comments

On pe, 2016-10-14 at 13:18 +0100, Chris Wilson wrote:
> Having moved the locked phase of freeing an object to a separate worker,
> we can now declare to the core that we only need the unlocked variant of
> driver->gem_free_object, and can use the simple unreference internally.
> 
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

Now has a commit message as suggested by John. With that, R-b from John too?

> @@ -1562,7 +1562,7 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
>  out_pages:
>  	i915_gem_object_unpin_pages(obj);
>  out_unlocked:

"out_put:" or simply "out:"?

With the "_unlocked" eliminated from the label;

Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

Regards, Joonas