drm: update some function so a driver can call them

This patch splits some ioctl functions so that they can be called
in-kernel by a DRM driver. The driver will use them later.

From: Ian Romanick <idr@us.ibm.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

4 files changed, 167 insertions, 101 deletions

diff --git a/drivers/char/drm/drmP.h b/drivers/char/drm/drmP.h
index 7e633a9ce93..d16d07e28b4 100644
--- a/drivers/char/drm/drmP.h
+++ b/drivers/char/drm/drmP.h
@@ -889,11 +889,16 @@ extern int	     drm_lock_free(drm_device_t *dev,
 				    unsigned int context);
 
 				/* Buffer management support (drm_bufs.h) */
+extern int drm_addmap(drm_device_t *dev, unsigned int offset,
+		      unsigned int size, drm_map_type_t type,
+		      drm_map_flags_t flags, drm_map_t **map_ptr);
+extern int drm_addmap_ioctl(struct inode *inode, struct file *filp,
+			    unsigned int cmd, unsigned long arg);
+extern int drm_rmmap(drm_device_t *dev, void *handle);
+extern int drm_rmmap_ioctl(struct inode *inode, struct file *filp,
+			   unsigned int cmd, unsigned long arg);
+
 extern int	     drm_order( unsigned long size );
-extern int	     drm_addmap( struct inode *inode, struct file *filp,
-				  unsigned int cmd, unsigned long arg );
-extern int	     drm_rmmap( struct inode *inode, struct file *filp,
-				 unsigned int cmd, unsigned long arg );
 extern int	     drm_addbufs( struct inode *inode, struct file *filp,
 				   unsigned int cmd, unsigned long arg );
 extern int	     drm_infobufs( struct inode *inode, struct file *filp,
@@ -927,15 +932,18 @@ extern void          drm_vbl_send_signals( drm_device_t *dev );
 
 				/* AGP/GART support (drm_agpsupport.h) */
 extern drm_agp_head_t *drm_agp_init(drm_device_t *dev);
-extern int            drm_agp_acquire(struct inode *inode, struct file *filp,
-				       unsigned int cmd, unsigned long arg);
-extern void           drm_agp_do_release(drm_device_t *dev);
-extern int            drm_agp_release(struct inode *inode, struct file *filp,
-				       unsigned int cmd, unsigned long arg);
-extern int            drm_agp_enable(struct inode *inode, struct file *filp,
-				      unsigned int cmd, unsigned long arg);
-extern int            drm_agp_info(struct inode *inode, struct file *filp,
-				    unsigned int cmd, unsigned long arg);
+extern int drm_agp_acquire(drm_device_t * dev);
+extern int drm_agp_acquire_ioctl(struct inode *inode, struct file *filp,
+			   unsigned int cmd, unsigned long arg);
+extern int drm_agp_release(drm_device_t *dev);
+extern int drm_agp_release_ioctl(struct inode *inode, struct file *filp,
+			   unsigned int cmd, unsigned long arg);
+extern int drm_agp_enable(drm_device_t *dev, drm_agp_mode_t mode);
+extern int drm_agp_enable_ioctl(struct inode *inode, struct file *filp,
+			  unsigned int cmd, unsigned long arg);
+extern int drm_agp_info(drm_device_t * dev, drm_agp_info_t *info);
+extern int drm_agp_info_ioctl(struct inode *inode, struct file *filp,
+			unsigned int cmd, unsigned long arg);
 extern int            drm_agp_alloc(struct inode *inode, struct file *filp,
 				     unsigned int cmd, unsigned long arg);
 extern int            drm_agp_free(struct inode *inode, struct file *filp,
diff --git a/drivers/char/drm/drm_agpsupport.c b/drivers/char/drm/drm_agpsupport.c
index 8d94c0b5fa4..10c8b4daec5 100644
--- a/drivers/char/drm/drm_agpsupport.c
+++ b/drivers/char/drm/drm_agpsupport.c
@@ -37,7 +37,7 @@
 #if __OS_HAS_AGP
 
 /**
- * AGP information ioctl.
+ * Get AGP information.
  *
  * \param inode device inode.
  * \param filp file pointer.
@@ -48,51 +48,56 @@
  * Verifies the AGP device has been initialized and acquired and fills in the
  * drm_agp_info structure with the information in drm_agp_head::agp_info.
  */
-int drm_agp_info(struct inode *inode, struct file *filp,
-		  unsigned int cmd, unsigned long arg)
+int drm_agp_info(drm_device_t *dev, drm_agp_info_t *info)
 {
-	drm_file_t	 *priv	 = filp->private_data;
-	drm_device_t	 *dev	 = priv->head->dev;
 	DRM_AGP_KERN     *kern;
-	drm_agp_info_t   info;
 
 	if (!dev->agp || !dev->agp->acquired)
 		return -EINVAL;
 
 	kern                   = &dev->agp->agp_info;
-	info.agp_version_major = kern->version.major;
-	info.agp_version_minor = kern->version.minor;
-	info.mode              = kern->mode;
-	info.aperture_base     = kern->aper_base;
-	info.aperture_size     = kern->aper_size * 1024 * 1024;
-	info.memory_allowed    = kern->max_memory << PAGE_SHIFT;
-	info.memory_used       = kern->current_memory << PAGE_SHIFT;
-	info.id_vendor         = kern->device->vendor;
-	info.id_device         = kern->device->device;
-
-	if (copy_to_user((drm_agp_info_t __user *)arg, &info, sizeof(info)))
+	info->agp_version_major = kern->version.major;
+	info->agp_version_minor = kern->version.minor;
+	info->mode              = kern->mode;
+	info->aperture_base     = kern->aper_base;
+	info->aperture_size     = kern->aper_size * 1024 * 1024;
+	info->memory_allowed    = kern->max_memory << PAGE_SHIFT;
+	info->memory_used       = kern->current_memory << PAGE_SHIFT;
+	info->id_vendor         = kern->device->vendor;
+	info->id_device         = kern->device->device;
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_agp_info);
+
+int drm_agp_info_ioctl(struct inode *inode, struct file *filp,
+		 unsigned int cmd, unsigned long arg)
+{
+	drm_file_t *priv = filp->private_data;
+	drm_device_t *dev = priv->head->dev;
+	drm_agp_info_t info;
+	int err;
+
+	err = drm_agp_info(dev, &info);
+	if (err)
+		return err;
+	
+	if (copy_to_user((drm_agp_info_t __user *) arg, &info, sizeof(info)))
 		return -EFAULT;
 	return 0;
 }
 
 /**
- * Acquire the AGP device (ioctl).
+ * Acquire the AGP device.
  *
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg user argument.
+ * \param dev DRM device that is to acquire AGP
  * \return zero on success or a negative number on failure. 
  *
  * Verifies the AGP device hasn't been acquired before and calls
- * agp_acquire().
+ * \c agp_backend_acquire.
  */
-int drm_agp_acquire(struct inode *inode, struct file *filp,
-		     unsigned int cmd, unsigned long arg)
+int drm_agp_acquire(drm_device_t *dev)
 {
-	drm_file_t	 *priv	 = filp->private_data;
-	drm_device_t	 *dev	 = priv->head->dev;
-
 	if (!dev->agp)
 		return -ENODEV;
 	if (dev->agp->acquired)
@@ -102,9 +107,10 @@ int drm_agp_acquire(struct inode *inode, struct file *filp,
 	dev->agp->acquired = 1;
 	return 0;
 }
+EXPORT_SYMBOL(drm_agp_acquire);
 
 /**
- * Release the AGP device (ioctl).
+ * Acquire the AGP device (ioctl).
  *
  * \param inode device inode.
  * \param filp file pointer.
@@ -112,63 +118,80 @@ int drm_agp_acquire(struct inode *inode, struct file *filp,
  * \param arg user argument.
  * \return zero on success or a negative number on failure.
  *
- * Verifies the AGP device has been acquired and calls agp_backend_release().
+ * Verifies the AGP device hasn't been acquired before and calls
+ * \c agp_backend_acquire.
  */
-int drm_agp_release(struct inode *inode, struct file *filp,
-		     unsigned int cmd, unsigned long arg)
+int drm_agp_acquire_ioctl(struct inode *inode, struct file *filp,
+			  unsigned int cmd, unsigned long arg)
 {
-	drm_file_t	 *priv	 = filp->private_data;
-	drm_device_t	 *dev	 = priv->head->dev;
+	drm_file_t *priv = filp->private_data;
+	
+	return drm_agp_acquire( (drm_device_t *) priv->head->dev );
+}
 
+/**
+ * Release the AGP device.
+ *
+ * \param dev DRM device that is to release AGP
+ * \return zero on success or a negative number on failure.
+ *
+ * Verifies the AGP device has been acquired and calls \c agp_backend_release.
+ */
+int drm_agp_release(drm_device_t *dev)
+{
 	if (!dev->agp || !dev->agp->acquired)
 		return -EINVAL;
 	agp_backend_release(dev->agp->bridge);
 	dev->agp->acquired = 0;
 	return 0;
-
 }
+EXPORT_SYMBOL(drm_agp_release);
 
-/**
- * Release the AGP device.
- *
- * Calls agp_backend_release().
- */
-void drm_agp_do_release(drm_device_t *dev)
+int drm_agp_release_ioctl(struct inode *inode, struct file *filp,
+			  unsigned int cmd, unsigned long arg)
 {
-  agp_backend_release(dev->agp->bridge);
+	drm_file_t *priv = filp->private_data;
+	drm_device_t *dev = priv->head->dev;
+	
+	return drm_agp_release(dev);
 }
 
 /**
  * Enable the AGP bus.
  * 
- * \param inode device inode.
- * \param filp file pointer.
- * \param cmd command.
- * \param arg pointer to a drm_agp_mode structure.
+ * \param dev DRM device that has previously acquired AGP.
+ * \param mode Requested AGP mode.
  * \return zero on success or a negative number on failure.
  *
  * Verifies the AGP device has been acquired but not enabled, and calls
- * agp_enable().
+ * \c agp_enable.
  */
-int drm_agp_enable(struct inode *inode, struct file *filp,
-		    unsigned int cmd, unsigned long arg)
+int drm_agp_enable(drm_device_t *dev, drm_agp_mode_t mode)
 {
-	drm_file_t	 *priv	 = filp->private_data;
-	drm_device_t	 *dev	 = priv->head->dev;
-	drm_agp_mode_t   mode;
-
 	if (!dev->agp || !dev->agp->acquired)
 		return -EINVAL;
 
-	if (copy_from_user(&mode, (drm_agp_mode_t __user *)arg, sizeof(mode)))
-		return -EFAULT;
-
 	dev->agp->mode    = mode.mode;
 	agp_enable(dev->agp->bridge, mode.mode);
 	dev->agp->base    = dev->agp->agp_info.aper_base;
 	dev->agp->enabled = 1;
 	return 0;
 }
+EXPORT_SYMBOL(drm_agp_enable);
+
+int drm_agp_enable_ioctl(struct inode *inode, struct file *filp,
+		   unsigned int cmd, unsigned long arg)
+{
+	drm_file_t *priv = filp->private_data;
+	drm_device_t *dev = priv->head->dev;
+	drm_agp_mode_t mode;
+
+
+	if (copy_from_user(&mode, (drm_agp_mode_t __user *) arg, sizeof(mode)))
+		return -EFAULT;
+
+	return drm_agp_enable(dev, mode);
+}
 
 /**
  * Allocate AGP memory.
diff --git a/drivers/char/drm/drm_bufs.c b/drivers/char/drm/drm_bufs.c
index be54efbefe8..cd4636f7f18 100644
--- a/drivers/char/drm/drm_bufs.c
+++ b/drivers/char/drm/drm_bufs.c
@@ -82,26 +82,22 @@ static unsigned int map32_handle = 0x10000000;
  * type.  Adds the map to the map list drm_device::maplist. Adds MTRR's where
  * applicable and if supported by the kernel.
  */
-int drm_addmap( struct inode *inode, struct file *filp,
-		 unsigned int cmd, unsigned long arg )
+int drm_addmap(drm_device_t * dev, unsigned int offset,
+	       unsigned int size, drm_map_type_t type,
+	       drm_map_flags_t flags, drm_local_map_t ** map_ptr)
 {
-	drm_file_t *priv = filp->private_data;
-	drm_device_t *dev = priv->head->dev;
 	drm_map_t *map;
-	drm_map_t __user *argp = (void __user *)arg;
 	drm_map_list_t *list;
 	drm_dma_handle_t *dmah;
 
-	if ( !(filp->f_mode & 3) ) return -EACCES; /* Require read/write */
-
 	map = drm_alloc( sizeof(*map), DRM_MEM_MAPS );
 	if ( !map )
 		return -ENOMEM;
 
-	if ( copy_from_user( map, argp, sizeof(*map) ) ) {
-		drm_free( map, sizeof(*map), DRM_MEM_MAPS );
-		return -EFAULT;
-	}
+	map->offset = offset;
+	map->size = size;
+	map->flags = flags;
+	map->type = type;
 
 	/* Only allow shared memory to be removable since we only keep enough
 	 * book keeping information about shared memory to allow for removal
@@ -218,10 +214,42 @@ int drm_addmap( struct inode *inode, struct file *filp,
 #endif
  	up(&dev->struct_sem);
 
-	if ( copy_to_user( argp, map, sizeof(*map) ) )
+	*map_ptr = map;
+	return 0;
+}
+EXPORT_SYMBOL(drm_addmap);
+
+int drm_addmap_ioctl(struct inode *inode, struct file *filp,
+		     unsigned int cmd, unsigned long arg)
+{
+	drm_file_t *priv = filp->private_data;
+	drm_device_t *dev = priv->head->dev;
+	drm_map_t map;
+	drm_map_t *map_ptr;
+	drm_map_t __user *argp = (void __user *)arg;
+	int err;
+
+	if (!(filp->f_mode & 3))
+		return -EACCES;	/* Require read/write */
+
+	if (copy_from_user(& map, argp, sizeof(map))) {
 		return -EFAULT;
-	if (copy_to_user(&argp->handle, &map->offset, sizeof(map->offset)))
+	}
+
+	err = drm_addmap( dev, map.offset, map.size, map.type, map.flags,
+			  &map_ptr );
+
+	if (err) {
+		return err;
+	}
+
+	if (copy_to_user(argp, map_ptr, sizeof(*map_ptr)))
 		return -EFAULT;
+	if (map_ptr->type != _DRM_SHM) {
+		if (copy_to_user(&argp->handle, &map_ptr->offset,
+				 sizeof(map_ptr->offset)))
+			return -EFAULT;
+	}
 	return 0;
 }
 
@@ -240,32 +268,23 @@ int drm_addmap( struct inode *inode, struct file *filp,
  * its being used, and free any associate resource (such as MTRR's) if it's not
  * being on use.
  *
- * \sa addmap().
+ * \sa drm_addmap
  */
-int drm_rmmap(struct inode *inode, struct file *filp,
-	       unsigned int cmd, unsigned long arg)
+int drm_rmmap(drm_device_t *dev, void *handle)
 {
-	drm_file_t	*priv	= filp->private_data;
-	drm_device_t	*dev	= priv->head->dev;
 	struct list_head *list;
 	drm_map_list_t *r_list = NULL;
 	drm_vma_entry_t *pt, *prev;
 	drm_map_t *map;
-	drm_map_t request;
 	int found_maps = 0;
 
-	if (copy_from_user(&request, (drm_map_t __user *)arg,
-			   sizeof(request))) {
-		return -EFAULT;
-	}
-
 	down(&dev->struct_sem);
 	list = &dev->maplist->head;
 	list_for_each(list, &dev->maplist->head) {
 		r_list = list_entry(list, drm_map_list_t, head);
 
 		if(r_list->map &&
-		   r_list->map->offset == (unsigned long) request.handle &&
+		   r_list->map->handle == handle &&
 		   r_list->map->flags & _DRM_REMOVABLE) break;
 	}
 
@@ -319,6 +338,21 @@ int drm_rmmap(struct inode *inode, struct file *filp,
 	up(&dev->struct_sem);
 	return 0;
 }
+EXPORT_SYMBOL(drm_rmmap);
+
+int drm_rmmap_ioctl(struct inode *inode, struct file *filp,
+		    unsigned int cmd, unsigned long arg)
+{
+	drm_file_t *priv = filp->private_data;
+	drm_device_t *dev = priv->head->dev;
+	drm_map_t request;
+
+	if (copy_from_user(&request, (drm_map_t __user *)arg, sizeof(request))) {
+		return -EFAULT;
+	}
+
+	return drm_rmmap(dev, request.handle);
+}
 
 /**
  * Cleanup after an error on one of the addbufs() functions.
diff --git a/drivers/char/drm/drm_drv.c b/drivers/char/drm/drm_drv.c
index ab172ea8e98..9b09b105e1d 100644
--- a/drivers/char/drm/drm_drv.c
+++ b/drivers/char/drm/drm_drv.c
@@ -70,8 +70,8 @@ static drm_ioctl_desc_t		  drm_ioctls[] = {
 	[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)]       = { drm_noop,        1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)]    = { drm_authmagic,   1, 1 },
 
-	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)]       = { drm_addmap,      1, 1 },
-	[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)]        = { drm_rmmap,       1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)]       = { drm_addmap_ioctl,1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)]        = { drm_rmmap_ioctl, 1, 0 },
 
 	[DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = { drm_setsareactx, 1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = { drm_getsareactx, 1, 0 },
@@ -102,10 +102,10 @@ static drm_ioctl_desc_t		  drm_ioctls[] = {
 	[DRM_IOCTL_NR(DRM_IOCTL_CONTROL)]       = { drm_control,     1, 1 },
 
 #if __OS_HAS_AGP
-	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)]   = { drm_agp_acquire, 1, 1 },
-	[DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)]   = { drm_agp_release, 1, 1 },
-	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)]    = { drm_agp_enable,  1, 1 },
-	[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)]      = { drm_agp_info,    1, 0 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)]   = { drm_agp_acquire_ioctl, 1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)]   = { drm_agp_release_ioctl, 1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)]    = { drm_agp_enable_ioctl, 1, 1 },
+	[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)]      = { drm_agp_info_ioctl, 1, 0 },
 	[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)]     = { drm_agp_alloc,   1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)]      = { drm_agp_free,    1, 1 },
 	[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)]      = { drm_agp_bind,    1, 1 },
@@ -178,7 +178,8 @@ int drm_takedown( drm_device_t *dev )
 		}
 		dev->agp->memory = NULL;
 
-		if ( dev->agp->acquired ) drm_agp_do_release(dev);
+		if (dev->agp->acquired)
+		  drm_agp_release(dev);
 
 		dev->agp->acquired = 0;
 		dev->agp->enabled  = 0;