[PATCH 30/34] drm/sis: Convert object_idr to XArray

From: Matthew Wilcox <willy@infradead.org>
To: dri-devel@lists.freedesktop.org
Cc: Matthew Wilcox <willy@infradead.org>
Subject: [PATCH 30/34] drm/sis: Convert object_idr to XArray
Date: Thu, 21 Feb 2019 10:42:18 -0800	[thread overview]
Message-ID: <20190221184226.2149-59-willy@infradead.org> (raw)
In-Reply-To: <20190221184226.2149-1-willy@infradead.org>

Signed-off-by: Matthew Wilcox <willy@infradead.org>
---
 drivers/gpu/drm/sis/sis_drv.c |  4 +---
 drivers/gpu/drm/sis/sis_drv.h |  2 +-
 drivers/gpu/drm/sis/sis_mm.c  | 17 ++++++++---------
 3 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/sis/sis_drv.c b/drivers/gpu/drm/sis/sis_drv.c
index e04a92658cd7..bb5caad5d365 100644
--- a/drivers/gpu/drm/sis/sis_drv.c
+++ b/drivers/gpu/drm/sis/sis_drv.c
@@ -47,7 +47,7 @@ static int sis_driver_load(struct drm_device *dev, unsigned long chipset)
 	if (dev_priv == NULL)
 		return -ENOMEM;
 
-	idr_init(&dev_priv->object_idr);
+	xa_init_flags(&dev_priv->objects, XA_FLAGS_ALLOC1);
 	dev->dev_private = (void *)dev_priv;
 	dev_priv->chipset = chipset;
 
@@ -58,8 +58,6 @@ static void sis_driver_unload(struct drm_device *dev)
 {
 	drm_sis_private_t *dev_priv = dev->dev_private;
 
-	idr_destroy(&dev_priv->object_idr);
-
 	kfree(dev_priv);
 }
 
diff --git a/drivers/gpu/drm/sis/sis_drv.h b/drivers/gpu/drm/sis/sis_drv.h
index 328f8a750976..18277fee8550 100644
--- a/drivers/gpu/drm/sis/sis_drv.h
+++ b/drivers/gpu/drm/sis/sis_drv.h
@@ -64,7 +64,7 @@ typedef struct drm_sis_private {
 	struct drm_mm vram_mm;
 	struct drm_mm agp_mm;
 	/** Mapping of userspace keys to mm objects */
-	struct idr object_idr;
+	struct xarray objects;
 } drm_sis_private_t;
 
 struct sis_file_private {
diff --git a/drivers/gpu/drm/sis/sis_mm.c b/drivers/gpu/drm/sis/sis_mm.c
index 1622db24cd39..2fbc31697563 100644
--- a/drivers/gpu/drm/sis/sis_mm.c
+++ b/drivers/gpu/drm/sis/sis_mm.c
@@ -84,9 +84,10 @@ static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
 {
 	drm_sis_private_t *dev_priv = dev->dev_private;
 	drm_sis_mem_t *mem = data;
-	int retval = 0, user_key;
+	int retval = 0;
 	struct sis_memblock *item;
 	struct sis_file_private *file_priv = file->driver_priv;
+	unsigned int id;
 	unsigned long offset;
 
 	mutex_lock(&dev->struct_mutex);
@@ -128,23 +129,22 @@ static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
 	if (retval)
 		goto fail_alloc;
 
-	retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
+	retval = xa_alloc(&dev_priv->objects, &id, item, xa_limit_31b,
+			GFP_KERNEL);
 	if (retval < 0)
-		goto fail_idr;
-	user_key = retval;
-
+		goto fail_xa;
 	list_add(&item->owner_list, &file_priv->obj_list);
 	mutex_unlock(&dev->struct_mutex);
 
+	mem->free = id;
 	mem->offset = ((pool == 0) ?
 		      dev_priv->vram_offset : dev_priv->agp_offset) +
 	    (offset << SIS_MM_ALIGN_SHIFT);
-	mem->free = user_key;
 	mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
 
 	return 0;
 
-fail_idr:
+fail_xa:
 	drm_mm_remove_node(&item->mm_node);
 fail_alloc:
 	kfree(item);
@@ -167,13 +167,12 @@ static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *fil
 	struct sis_memblock *obj;
 
 	mutex_lock(&dev->struct_mutex);
-	obj = idr_find(&dev_priv->object_idr, mem->free);
+	obj = xa_erase(&dev_priv->objects, mem->free);
 	if (obj == NULL) {
 		mutex_unlock(&dev->struct_mutex);
 		return -EINVAL;
 	}
 
-	idr_remove(&dev_priv->object_idr, mem->free);
 	list_del(&obj->owner_list);
 	if (drm_mm_node_allocated(&obj->mm_node))
 		drm_mm_remove_node(&obj->mm_node);
-- 
2.20.1

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