drm: add _DRM_DRIVER flag, and re-order unload.

Allow drivers to addmaps that won't be removed by lastclose or unload.
The unload needs to be re-ordered to avoid removing the hashs before
the driver has removed the final maps.

Signed-off-by: Dave Airlie <airlied@linux.ie>

3 files changed, 11 insertions, 8 deletions

diff --git a/drivers/char/drm/drm.h b/drivers/char/drm/drm.h
index 82fb3d0d2785..3a05c6d5ebe1 100644
--- a/drivers/char/drm/drm.h
+++ b/drivers/char/drm/drm.h
@@ -202,7 +202,8 @@ enum drm_map_flags {
         _DRM_KERNEL = 0x08,          /**< kernel requires access */
         _DRM_WRITE_COMBINING = 0x10, /**< use write-combining if available */
         _DRM_CONTAINS_LOCK = 0x20,   /**< SHM page that contains lock */
-        _DRM_REMOVABLE = 0x40        /**< Removable mapping */
+        _DRM_REMOVABLE = 0x40,       /**< Removable mapping */
+        _DRM_DRIVER = 0x80           /**< Managed by driver */
 };
 
 struct drm_ctx_priv_map {
diff --git a/drivers/char/drm/drm_drv.c b/drivers/char/drm/drm_drv.c
index d29d7ed91bdd..77e2fb7b7b37 100644
--- a/drivers/char/drm/drm_drv.c
+++ b/drivers/char/drm/drm_drv.c
@@ -200,8 +200,10 @@ int drm_lastclose(struct drm_device * dev)
         }
 
         list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
-                drm_rmmap_locked(dev, r_list->map);
-                r_list = NULL;
+                if (!(r_list->map->flags & _DRM_DRIVER)) {
+                        drm_rmmap_locked(dev, r_list->map);
+                        r_list = NULL;
+                }
         }
 
         if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) {
@@ -291,10 +293,6 @@ static void drm_cleanup(struct drm_device * dev)
 
         drm_lastclose(dev);
 
-        drm_ht_remove(&dev->map_hash);
-
-        drm_ctxbitmap_cleanup(dev);
-
         if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) &&
             dev->agp && dev->agp->agp_mtrr >= 0) {
                 int retval;
@@ -312,6 +310,9 @@ static void drm_cleanup(struct drm_device * dev)
         if (dev->driver->unload)
                 dev->driver->unload(dev);
 
+        drm_ht_remove(&dev->map_hash);
+        drm_ctxbitmap_cleanup(dev);
+
         drm_put_head(&dev->primary);
         if (drm_put_dev(dev))
                 DRM_ERROR("Cannot unload module\n");
diff --git a/drivers/char/drm/i915_dma.c b/drivers/char/drm/i915_dma.c
index b8db9652e9dd..24f86e07d6a4 100644
--- a/drivers/char/drm/i915_dma.c
+++ b/drivers/char/drm/i915_dma.c
@@ -778,7 +778,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
         base = drm_get_resource_start(dev, mmio_bar);
         size = drm_get_resource_len(dev, mmio_bar);
 
-        ret = drm_addmap(dev, base, size, _DRM_REGISTERS, _DRM_KERNEL,
+        ret = drm_addmap(dev, base, size, _DRM_REGISTERS,
+                         _DRM_KERNEL | _DRM_DRIVER,
                          &dev_priv->mmio_map);
         return ret;
 }