drm/i915: Use lockless object free

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>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161028125858.23563-20-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index b308f71..91cd7b2 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -2575,7 +2575,7 @@ 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 6f648a3..c3c49bc 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2404,19 +2404,12 @@ __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 *);
 
@@ -2511,7 +2504,6 @@ 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 07b2eb6..fdcbaab 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -617,7 +617,7 @@ 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;
 
@@ -1111,7 +1111,7 @@ 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;
 }
 
@@ -1444,7 +1444,7 @@ 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;
 }
 
@@ -1520,7 +1520,7 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
                                   MAX_SCHEDULE_TIMEOUT,
                                   to_rps_client(file));
        if (err)
-               goto out_unlocked;
+               goto out;
 
        /* Flush and acquire obj->pages so that we are coherent through
         * direct access in memory with previous cached writes through
@@ -1532,11 +1532,11 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
         */
        err = i915_gem_object_pin_pages(obj);
        if (err)
-               goto out_unlocked;
+               goto out;
 
        err = i915_mutex_lock_interruptible(dev);
        if (err)
-               goto out_pages;
+               goto out_unpin;
 
        if (read_domains & I915_GEM_DOMAIN_GTT)
                err = i915_gem_object_set_to_gtt_domain(obj, write_domain != 0);
@@ -1551,10 +1551,10 @@ i915_gem_set_domain_ioctl(struct drm_device *dev, void *data,
        if (write_domain != 0)
                intel_fb_obj_invalidate(obj, write_origin(obj, write_domain));
 
-out_pages:
+out_unpin:
        i915_gem_object_unpin_pages(obj);
-out_unlocked:
-       i915_gem_object_put_unlocked(obj);
+out:
+       i915_gem_object_put(obj);
        return err;
 }
 
@@ -1585,7 +1585,7 @@ i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
                }
        }
 
-       i915_gem_object_put_unlocked(obj);
+       i915_gem_object_put(obj);
        return err;
 }
 
@@ -1631,7 +1631,7 @@ 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;
        }
 
@@ -1643,7 +1643,7 @@ 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);
@@ -1657,7 +1657,7 @@ 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;
 
@@ -2105,7 +2105,7 @@ 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;
 }
 
@@ -2932,7 +2932,7 @@ 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 c63a9cf..6395e62 100644 (file)
--- 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 6c8c7b3..c30d04f 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/i915_gem_userptr.c
@@ -546,7 +546,7 @@ __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);
 }
@@ -806,7 +806,7 @@ 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 e4800b8..87135d9 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11051,7 +11051,7 @@ 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;
 }
@@ -12360,7 +12360,7 @@ 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);
@@ -15934,7 +15934,7 @@ 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 25bcd4a..fd0e4da 100644 (file)
--- 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 6f19e60..b544248 100644 (file)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5878,7 +5878,7 @@ 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;
 }