drm: Move master functions into drm_auth.c

For modern drivers pretty much the only thing drm_master does is
handling authentication for the primary/legacy drm_minor node. Instead
of having it all over drm files, move it all together into drm_auth.c.

This patch just does code-motion, follow up patches will also extract
the master logic from file open&release paths.

Reviewed-by: Chris Wilson Mchris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465930269-7883-5-git-send-email-daniel.vetter@ffwll.ch

diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c
index 50d0baa..1d314ae 100644 (file)
--- a/drivers/gpu/drm/drm_auth.c
+++ b/drivers/gpu/drm/drm_auth.c
@@ -30,6 +30,7 @@
 
 #include <drm/drmP.h>
 #include "drm_internal.h"
+#include "drm_legacy.h"
 
 /**
  * drm_getmagic - Get unique magic of a client
@@ -91,3 +92,165 @@ int drm_authmagic(struct drm_device *dev, void *data,
 
        return file ? 0 : -EINVAL;
 }
+
+static struct drm_master *drm_master_create(struct drm_device *dev)
+{
+       struct drm_master *master;
+
+       master = kzalloc(sizeof(*master), GFP_KERNEL);
+       if (!master)
+               return NULL;
+
+       kref_init(&master->refcount);
+       spin_lock_init(&master->lock.spinlock);
+       init_waitqueue_head(&master->lock.lock_queue);
+       idr_init(&master->magic_map);
+       master->dev = dev;
+
+       return master;
+}
+
+/*
+ * drm_new_set_master - Allocate a new master object and become master for the
+ * associated master realm.
+ *
+ * @dev: The associated device.
+ * @fpriv: File private identifying the client.
+ *
+ * This function must be called with dev::struct_mutex held.
+ * Returns negative error code on failure. Zero on success.
+ */
+int drm_new_set_master(struct drm_device *dev, struct drm_file *fpriv)
+{
+       struct drm_master *old_master;
+       int ret;
+
+       lockdep_assert_held_once(&dev->master_mutex);
+
+       /* create a new master */
+       fpriv->minor->master = drm_master_create(fpriv->minor->dev);
+       if (!fpriv->minor->master)
+               return -ENOMEM;
+
+       /* take another reference for the copy in the local file priv */
+       old_master = fpriv->master;
+       fpriv->master = drm_master_get(fpriv->minor->master);
+
+       if (dev->driver->master_create) {
+               ret = dev->driver->master_create(dev, fpriv->master);
+               if (ret)
+                       goto out_err;
+       }
+       if (dev->driver->master_set) {
+               ret = dev->driver->master_set(dev, fpriv, true);
+               if (ret)
+                       goto out_err;
+       }
+
+       fpriv->is_master = 1;
+       fpriv->allowed_master = 1;
+       fpriv->authenticated = 1;
+       if (old_master)
+               drm_master_put(&old_master);
+
+       return 0;
+
+out_err:
+       /* drop both references and restore old master on failure */
+       drm_master_put(&fpriv->minor->master);
+       drm_master_put(&fpriv->master);
+       fpriv->master = old_master;
+
+       return ret;
+}
+
+int drm_setmaster_ioctl(struct drm_device *dev, void *data,
+                       struct drm_file *file_priv)
+{
+       int ret = 0;
+
+       mutex_lock(&dev->master_mutex);
+       if (file_priv->is_master)
+               goto out_unlock;
+
+       if (file_priv->minor->master) {
+               ret = -EINVAL;
+               goto out_unlock;
+       }
+
+       if (!file_priv->master) {
+               ret = -EINVAL;
+               goto out_unlock;
+       }
+
+       if (!file_priv->allowed_master) {
+               ret = drm_new_set_master(dev, file_priv);
+               goto out_unlock;
+       }
+
+       file_priv->minor->master = drm_master_get(file_priv->master);
+       file_priv->is_master = 1;
+       if (dev->driver->master_set) {
+               ret = dev->driver->master_set(dev, file_priv, false);
+               if (unlikely(ret != 0)) {
+                       file_priv->is_master = 0;
+                       drm_master_put(&file_priv->minor->master);
+               }
+       }
+
+out_unlock:
+       mutex_unlock(&dev->master_mutex);
+       return ret;
+}
+
+int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
+                        struct drm_file *file_priv)
+{
+       int ret = -EINVAL;
+
+       mutex_lock(&dev->master_mutex);
+       if (!file_priv->is_master)
+               goto out_unlock;
+
+       if (!file_priv->minor->master)
+               goto out_unlock;
+
+       ret = 0;
+       if (dev->driver->master_drop)
+               dev->driver->master_drop(dev, file_priv, false);
+       drm_master_put(&file_priv->minor->master);
+       file_priv->is_master = 0;
+
+out_unlock:
+       mutex_unlock(&dev->master_mutex);
+       return ret;
+}
+
+struct drm_master *drm_master_get(struct drm_master *master)
+{
+       kref_get(&master->refcount);
+       return master;
+}
+EXPORT_SYMBOL(drm_master_get);
+
+static void drm_master_destroy(struct kref *kref)
+{
+       struct drm_master *master = container_of(kref, struct drm_master, refcount);
+       struct drm_device *dev = master->dev;
+
+       if (dev->driver->master_destroy)
+               dev->driver->master_destroy(dev, master);
+
+       drm_legacy_master_rmmaps(dev, master);
+
+       idr_destroy(&master->magic_map);
+       kfree(master->unique);
+       kfree(master);
+}
+
+void drm_master_put(struct drm_master **master)
+{
+       kref_put(&(*master)->refcount, drm_master_destroy);
+       *master = NULL;
+}
+EXPORT_SYMBOL(drm_master_put);

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 3c01a16..8e67b4f 100644 (file)
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -93,114 +93,6 @@ void drm_ut_debug_printk(const char *function_name, const char *format, ...)
 }
 EXPORT_SYMBOL(drm_ut_debug_printk);
 
-struct drm_master *drm_master_create(struct drm_device *dev)
-{
-       struct drm_master *master;
-
-       master = kzalloc(sizeof(*master), GFP_KERNEL);
-       if (!master)
-               return NULL;
-
-       kref_init(&master->refcount);
-       spin_lock_init(&master->lock.spinlock);
-       init_waitqueue_head(&master->lock.lock_queue);
-       idr_init(&master->magic_map);
-       master->dev = dev;
-
-       return master;
-}
-
-struct drm_master *drm_master_get(struct drm_master *master)
-{
-       kref_get(&master->refcount);
-       return master;
-}
-EXPORT_SYMBOL(drm_master_get);
-
-static void drm_master_destroy(struct kref *kref)
-{
-       struct drm_master *master = container_of(kref, struct drm_master, refcount);
-       struct drm_device *dev = master->dev;
-
-       if (dev->driver->master_destroy)
-               dev->driver->master_destroy(dev, master);
-
-       drm_legacy_master_rmmaps(dev, master);
-
-       idr_destroy(&master->magic_map);
-       kfree(master->unique);
-       kfree(master);
-}
-
-void drm_master_put(struct drm_master **master)
-{
-       kref_put(&(*master)->refcount, drm_master_destroy);
-       *master = NULL;
-}
-EXPORT_SYMBOL(drm_master_put);
-
-int drm_setmaster_ioctl(struct drm_device *dev, void *data,
-                       struct drm_file *file_priv)
-{
-       int ret = 0;
-
-       mutex_lock(&dev->master_mutex);
-       if (file_priv->is_master)
-               goto out_unlock;
-
-       if (file_priv->minor->master) {
-               ret = -EINVAL;
-               goto out_unlock;
-       }
-
-       if (!file_priv->master) {
-               ret = -EINVAL;
-               goto out_unlock;
-       }
-
-       if (!file_priv->allowed_master) {
-               ret = drm_new_set_master(dev, file_priv);
-               goto out_unlock;
-       }
-
-       file_priv->minor->master = drm_master_get(file_priv->master);
-       file_priv->is_master = 1;
-       if (dev->driver->master_set) {
-               ret = dev->driver->master_set(dev, file_priv, false);
-               if (unlikely(ret != 0)) {
-                       file_priv->is_master = 0;
-                       drm_master_put(&file_priv->minor->master);
-               }
-       }
-
-out_unlock:
-       mutex_unlock(&dev->master_mutex);
-       return ret;
-}
-
-int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
-                        struct drm_file *file_priv)
-{
-       int ret = -EINVAL;
-
-       mutex_lock(&dev->master_mutex);
-       if (!file_priv->is_master)
-               goto out_unlock;
-
-       if (!file_priv->minor->master)
-               goto out_unlock;
-
-       ret = 0;
-       if (dev->driver->master_drop)
-               dev->driver->master_drop(dev, file_priv, false);
-       drm_master_put(&file_priv->minor->master);
-       file_priv->is_master = 0;
-
-out_unlock:
-       mutex_unlock(&dev->master_mutex);
-       return ret;
-}
-
 /*
  * DRM Minors
  * A DRM device can provide several char-dev interfaces on the DRM-Major. Each

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index bfbf138..50b3de9 100644 (file)
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -168,60 +168,6 @@ static int drm_cpu_valid(void)
 }
 
 /*
- * drm_new_set_master - Allocate a new master object and become master for the
- * associated master realm.
- *
- * @dev: The associated device.
- * @fpriv: File private identifying the client.
- *
- * This function must be called with dev::struct_mutex held.
- * Returns negative error code on failure. Zero on success.
- */
-int drm_new_set_master(struct drm_device *dev, struct drm_file *fpriv)
-{
-       struct drm_master *old_master;
-       int ret;
-
-       lockdep_assert_held_once(&dev->master_mutex);
-
-       /* create a new master */
-       fpriv->minor->master = drm_master_create(fpriv->minor->dev);
-       if (!fpriv->minor->master)
-               return -ENOMEM;
-
-       /* take another reference for the copy in the local file priv */
-       old_master = fpriv->master;
-       fpriv->master = drm_master_get(fpriv->minor->master);
-
-       if (dev->driver->master_create) {
-               ret = dev->driver->master_create(dev, fpriv->master);
-               if (ret)
-                       goto out_err;
-       }
-       if (dev->driver->master_set) {
-               ret = dev->driver->master_set(dev, fpriv, true);
-               if (ret)
-                       goto out_err;
-       }
-
-       fpriv->is_master = 1;
-       fpriv->allowed_master = 1;
-       fpriv->authenticated = 1;
-       if (old_master)
-               drm_master_put(&old_master);
-
-       return 0;
-
-out_err:
-       /* drop both references and restore old master on failure */
-       drm_master_put(&fpriv->minor->master);
-       drm_master_put(&fpriv->master);
-       fpriv->master = old_master;
-
-       return ret;
-}
-
-/*
  * Called whenever a process opens /dev/drm.
  *
  * \param filp file pointer.

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index f5c1d17..d29d426 100644 (file)
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -62,6 +62,11 @@ int drm_getmagic(struct drm_device *dev, void *data,
                 struct drm_file *file_priv);
 int drm_authmagic(struct drm_device *dev, void *data,
                  struct drm_file *file_priv);
+int drm_setmaster_ioctl(struct drm_device *dev, void *data,
+                       struct drm_file *file_priv);
+int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
+                        struct drm_file *file_priv);
+int drm_new_set_master(struct drm_device *dev, struct drm_file *fpriv);
 
 /* drm_sysfs.c */
 extern struct class *drm_class;
@@ -87,13 +92,6 @@ int drm_gem_open_ioctl(struct drm_device *dev, void *data,
 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
 
-/* drm_drv.c */
-int drm_setmaster_ioctl(struct drm_device *dev, void *data,
-                       struct drm_file *file_priv);
-int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
-                        struct drm_file *file_priv);
-struct drm_master *drm_master_create(struct drm_device *dev);
-
 /* drm_debugfs.c */
 #if defined(CONFIG_DEBUG_FS)
 int drm_debugfs_init(struct drm_minor *minor, int minor_id,

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 6067fef..2f67527 100644 (file)
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -928,7 +928,6 @@ int drm_open(struct inode *inode, struct file *filp);
 ssize_t drm_read(struct file *filp, char __user *buffer,
                 size_t count, loff_t *offset);
 int drm_release(struct inode *inode, struct file *filp);
-int drm_new_set_master(struct drm_device *dev, struct drm_file *fpriv);
 unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
 int drm_event_reserve_init_locked(struct drm_device *dev,
                                  struct drm_file *file_priv,