1 files changed, 24 insertions, 139 deletions

diff --git a/drivers/accel/drm_accel.c b/drivers/accel/drm_accel.c
index 4a9baf02439e..ca3357acd127 100644
--- a/drivers/accel/drm_accel.c
+++ b/drivers/accel/drm_accel.c
@@ -8,22 +8,19 @@
 
 #include <linux/debugfs.h>
 #include <linux/device.h>
-#include <linux/idr.h>
+#include <linux/xarray.h>
 
 #include <drm/drm_accel.h>
+#include <drm/drm_auth.h>
 #include <drm/drm_debugfs.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_file.h>
 #include <drm/drm_ioctl.h>
 #include <drm/drm_print.h>
 
-static DEFINE_SPINLOCK(accel_minor_lock);
-static struct idr accel_minors_idr;
+DEFINE_XARRAY_ALLOC(accel_minors_xa);
 
-static struct dentry *accel_debugfs_root;
-static struct class *accel_class;
-
-static struct device_type accel_sysfs_device_minor = {
+static const struct device_type accel_sysfs_device_minor = {
 	.name = "accel_minor"
 };
 
@@ -32,23 +29,19 @@ static char *accel_devnode(const struct device *dev, umode_t *mode)
 	return kasprintf(GFP_KERNEL, "accel/%s", dev_name(dev));
 }
 
+static const struct class accel_class = {
+	.name = "accel",
+	.devnode = accel_devnode,
+};
+
 static int accel_sysfs_init(void)
 {
-	accel_class = class_create("accel");
-	if (IS_ERR(accel_class))
-		return PTR_ERR(accel_class);
-
-	accel_class->devnode = accel_devnode;
-
-	return 0;
+	return class_register(&accel_class);
 }
 
 static void accel_sysfs_destroy(void)
 {
-	if (IS_ERR_OR_NULL(accel_class))
-		return;
-	class_destroy(accel_class);
-	accel_class = NULL;
+	class_unregister(&accel_class);
 }
 
 static int accel_name_info(struct seq_file *m, void *data)
@@ -79,29 +72,19 @@ static const struct drm_info_list accel_debugfs_list[] = {
 #define ACCEL_DEBUGFS_ENTRIES ARRAY_SIZE(accel_debugfs_list)
 
 /**
- * accel_debugfs_init() - Initialize debugfs for accel minor
- * @minor: Pointer to the drm_minor instance.
- * @minor_id: The minor's id
+ * accel_debugfs_register() - Register debugfs for device
+ * @dev: Pointer to the device instance.
  *
- * This function initializes the drm minor's debugfs members and creates
- * a root directory for the minor in debugfs. It also creates common files
- * for accelerators and calls the driver's debugfs init callback.
+ * Creates common files for accelerators.
  */
-void accel_debugfs_init(struct drm_minor *minor, int minor_id)
+void accel_debugfs_register(struct drm_device *dev)
 {
-	struct drm_device *dev = minor->dev;
-	char name[64];
+	struct drm_minor *minor = dev->accel;
 
-	INIT_LIST_HEAD(&minor->debugfs_list);
-	mutex_init(&minor->debugfs_lock);
-	sprintf(name, "%d", minor_id);
-	minor->debugfs_root = debugfs_create_dir(name, accel_debugfs_root);
+	minor->debugfs_root = dev->debugfs_root;
 
 	drm_debugfs_create_files(accel_debugfs_list, ACCEL_DEBUGFS_ENTRIES,
-				 minor->debugfs_root, minor);
-
-	if (dev->driver->debugfs_init)
-		dev->driver->debugfs_init(minor);
+				 dev->debugfs_root, minor);
 }
 
 /**
@@ -116,104 +99,11 @@ void accel_debugfs_init(struct drm_minor *minor, int minor_id)
 void accel_set_device_instance_params(struct device *kdev, int index)
 {
 	kdev->devt = MKDEV(ACCEL_MAJOR, index);
-	kdev->class = accel_class;
+	kdev->class = &accel_class;
 	kdev->type = &accel_sysfs_device_minor;
 }
 
 /**
- * accel_minor_alloc() - Allocates a new accel minor
- *
- * This function access the accel minors idr and allocates from it
- * a new id to represent a new accel minor
- *
- * Return: A new id on success or error code in case idr_alloc failed
- */
-int accel_minor_alloc(void)
-{
-	unsigned long flags;
-	int r;
-
-	spin_lock_irqsave(&accel_minor_lock, flags);
-	r = idr_alloc(&accel_minors_idr, NULL, 0, ACCEL_MAX_MINORS, GFP_NOWAIT);
-	spin_unlock_irqrestore(&accel_minor_lock, flags);
-
-	return r;
-}
-
-/**
- * accel_minor_remove() - Remove an accel minor
- * @index: The minor id to remove.
- *
- * This function access the accel minors idr and removes from
- * it the member with the id that is passed to this function.
- */
-void accel_minor_remove(int index)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&accel_minor_lock, flags);
-	idr_remove(&accel_minors_idr, index);
-	spin_unlock_irqrestore(&accel_minor_lock, flags);
-}
-
-/**
- * accel_minor_replace() - Replace minor pointer in accel minors idr.
- * @minor: Pointer to the new minor.
- * @index: The minor id to replace.
- *
- * This function access the accel minors idr structure and replaces the pointer
- * that is associated with an existing id. Because the minor pointer can be
- * NULL, we need to explicitly pass the index.
- *
- * Return: 0 for success, negative value for error
- */
-void accel_minor_replace(struct drm_minor *minor, int index)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&accel_minor_lock, flags);
-	idr_replace(&accel_minors_idr, minor, index);
-	spin_unlock_irqrestore(&accel_minor_lock, flags);
-}
-
-/*
- * Looks up the given minor-ID and returns the respective DRM-minor object. The
- * refence-count of the underlying device is increased so you must release this
- * object with accel_minor_release().
- *
- * The object can be only a drm_minor that represents an accel device.
- *
- * As long as you hold this minor, it is guaranteed that the object and the
- * minor->dev pointer will stay valid! However, the device may get unplugged and
- * unregistered while you hold the minor.
- */
-static struct drm_minor *accel_minor_acquire(unsigned int minor_id)
-{
-	struct drm_minor *minor;
-	unsigned long flags;
-
-	spin_lock_irqsave(&accel_minor_lock, flags);
-	minor = idr_find(&accel_minors_idr, minor_id);
-	if (minor)
-		drm_dev_get(minor->dev);
-	spin_unlock_irqrestore(&accel_minor_lock, flags);
-
-	if (!minor) {
-		return ERR_PTR(-ENODEV);
-	} else if (drm_dev_is_unplugged(minor->dev)) {
-		drm_dev_put(minor->dev);
-		return ERR_PTR(-ENODEV);
-	}
-
-	return minor;
-}
-
-static void accel_minor_release(struct drm_minor *minor)
-{
-	drm_dev_put(minor->dev);
-}
-
-/**
  * accel_open - open method for ACCEL file
  * @inode: device inode
  * @filp: file pointer.
@@ -230,7 +120,7 @@ int accel_open(struct inode *inode, struct file *filp)
 	struct drm_minor *minor;
 	int retcode;
 
-	minor = accel_minor_acquire(iminor(inode));
+	minor = drm_minor_acquire(&accel_minors_xa, iminor(inode));
 	if (IS_ERR(minor))
 		return PTR_ERR(minor);
 
@@ -249,7 +139,7 @@ int accel_open(struct inode *inode, struct file *filp)
 
 err_undo:
 	atomic_dec(&dev->open_count);
-	accel_minor_release(minor);
+	drm_minor_release(minor);
 	return retcode;
 }
 EXPORT_SYMBOL_GPL(accel_open);
@@ -260,7 +150,7 @@ static int accel_stub_open(struct inode *inode, struct file *filp)
 	struct drm_minor *minor;
 	int err;
 
-	minor = accel_minor_acquire(iminor(inode));
+	minor = drm_minor_acquire(&accel_minors_xa, iminor(inode));
 	if (IS_ERR(minor))
 		return PTR_ERR(minor);
 
@@ -277,7 +167,7 @@ static int accel_stub_open(struct inode *inode, struct file *filp)
 		err = 0;
 
 out:
-	accel_minor_release(minor);
+	drm_minor_release(minor);
 
 	return err;
 }
@@ -291,25 +181,20 @@ static const struct file_operations accel_stub_fops = {
 void accel_core_exit(void)
 {
 	unregister_chrdev(ACCEL_MAJOR, "accel");
-	debugfs_remove(accel_debugfs_root);
 	accel_sysfs_destroy();
-	idr_destroy(&accel_minors_idr);
+	WARN_ON(!xa_empty(&accel_minors_xa));
 }
 
 int __init accel_core_init(void)
 {
 	int ret;
 
-	idr_init(&accel_minors_idr);
-
 	ret = accel_sysfs_init();
 	if (ret < 0) {
 		DRM_ERROR("Cannot create ACCEL class: %d\n", ret);
 		goto error;
 	}
 
-	accel_debugfs_root = debugfs_create_dir("accel", NULL);
-
 	ret = register_chrdev(ACCEL_MAJOR, "accel", &accel_stub_fops);
 	if (ret < 0)
 		DRM_ERROR("Cannot register ACCEL major: %d\n", ret);