[PATCH] drm/xe: Make the gem shrinker drm managed

[Thomas Hellström]

Make the xe drm shrinker drm managed like many other resources
created at device creation time.

Signed-off-by: Thomas Hellström <thomas.hellstrom at linux.intel.com>
---
 drivers/gpu/drm/xe/xe_device.c   |  9 +++-----
 drivers/gpu/drm/xe/xe_shrinker.c | 37 ++++++++++++++++----------------
 drivers/gpu/drm/xe/xe_shrinker.h |  4 +---
 3 files changed, 22 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index c02c4c4e9412..399ae5f40321 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -402,9 +402,6 @@ static void xe_device_destroy(struct drm_device *dev, void *dummy)
 	if (xe->unordered_wq)
 		destroy_workqueue(xe->unordered_wq);
 
-	if (!IS_ERR_OR_NULL(xe->mem.shrinker))
-		xe_shrinker_destroy(xe->mem.shrinker);
-
 	if (xe->destroy_wq)
 		destroy_workqueue(xe->destroy_wq);
 
@@ -438,9 +435,9 @@ struct xe_device *xe_device_create(struct pci_dev *pdev,
 	if (err)
 		goto err;
 
-	xe->mem.shrinker = xe_shrinker_create(xe);
-	if (IS_ERR(xe->mem.shrinker))
-		return ERR_CAST(xe->mem.shrinker);
+	err = xe_shrinker_create(xe);
+	if (err)
+		goto err;
 
 	xe->info.devid = pdev->device;
 	xe->info.revid = pdev->revision;
diff --git a/drivers/gpu/drm/xe/xe_shrinker.c b/drivers/gpu/drm/xe/xe_shrinker.c
index 86d47aaf0358..125c836e0ee4 100644
--- a/drivers/gpu/drm/xe/xe_shrinker.c
+++ b/drivers/gpu/drm/xe/xe_shrinker.c
@@ -5,6 +5,7 @@
 
 #include <linux/shrinker.h>
 
+#include <drm/drm_managed.h>
 #include <drm/ttm/ttm_backup.h>
 #include <drm/ttm/ttm_bo.h>
 #include <drm/ttm/ttm_tt.h>
@@ -213,24 +214,34 @@ static void xe_shrinker_pm(struct work_struct *work)
 	xe_pm_runtime_put(shrinker->xe);
 }
 
+static void xe_shrinker_fini(struct drm_device *drm, void *arg)
+{
+	struct xe_shrinker *shrinker = arg;
+
+	xe_assert(shrinker->xe, !shrinker->shrinkable_pages);
+	xe_assert(shrinker->xe, !shrinker->purgeable_pages);
+	shrinker_free(shrinker->shrink);
+	flush_work(&shrinker->pm_worker);
+	kfree(shrinker);
+}
+
 /**
  * xe_shrinker_create() - Create an xe per-device shrinker
  * @xe: Pointer to the xe device.
  *
- * Returns: A pointer to the created shrinker on success,
- * Negative error code on failure.
+ * Return: %0 on success. Negative error code on failure.
  */
-struct xe_shrinker *xe_shrinker_create(struct xe_device *xe)
+int xe_shrinker_create(struct xe_device *xe)
 {
 	struct xe_shrinker *shrinker = kzalloc(sizeof(*shrinker), GFP_KERNEL);
 
 	if (!shrinker)
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 
 	shrinker->shrink = shrinker_alloc(0, "drm-xe_gem:%s", xe->drm.unique);
 	if (!shrinker->shrink) {
 		kfree(shrinker);
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 	}
 
 	INIT_WORK(&shrinker->pm_worker, xe_shrinker_pm);
@@ -240,19 +251,7 @@ struct xe_shrinker *xe_shrinker_create(struct xe_device *xe)
 	shrinker->shrink->scan_objects = xe_shrinker_scan;
 	shrinker->shrink->private_data = shrinker;
 	shrinker_register(shrinker->shrink);
+	xe->mem.shrinker = shrinker;
 
-	return shrinker;
-}
-
-/**
- * xe_shrinker_destroy() - Destroy an xe per-device shrinker
- * @shrinker: Pointer to the shrinker to destroy.
- */
-void xe_shrinker_destroy(struct xe_shrinker *shrinker)
-{
-	xe_assert(shrinker->xe, !shrinker->shrinkable_pages);
-	xe_assert(shrinker->xe, !shrinker->purgeable_pages);
-	shrinker_free(shrinker->shrink);
-	flush_work(&shrinker->pm_worker);
-	kfree(shrinker);
+	return drmm_add_action_or_reset(&xe->drm, xe_shrinker_fini, shrinker);
 }
diff --git a/drivers/gpu/drm/xe/xe_shrinker.h b/drivers/gpu/drm/xe/xe_shrinker.h
index 28a038f4fcbf..5132ae5192e1 100644
--- a/drivers/gpu/drm/xe/xe_shrinker.h
+++ b/drivers/gpu/drm/xe/xe_shrinker.h
@@ -11,8 +11,6 @@ struct xe_device;
 
 void xe_shrinker_mod_pages(struct xe_shrinker *shrinker, long shrinkable, long purgeable);
 
-struct xe_shrinker *xe_shrinker_create(struct xe_device *xe);
-
-void xe_shrinker_destroy(struct xe_shrinker *shrinker);
+int xe_shrinker_create(struct xe_device *xe);
 
 #endif
-- 
2.49.0