drm: add _DRM_CONSISTENT map type

Added a new DRM map type _DRM_CONSISTENT for consistent PCI memory. It
uses drm_pci_alloc/free for allocating/freeing the memory.

From: Felix Kuhling <fxkuehl@gmx.de>
Signed-off-by: David Airlie <airlied@linux.ie>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/char/drm/drm_vm.c b/drivers/char/drm/drm_vm.c
index 621220f3f372..644ec9dadc05 100644
--- a/drivers/char/drm/drm_vm.c
+++ b/drivers/char/drm/drm_vm.c
@@ -228,6 +228,10 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
                         case _DRM_AGP:
                         case _DRM_SCATTER_GATHER:
                                 break;
+                        case _DRM_CONSISTENT:
+                                drm_pci_free(dev, map->size, map->handle,
+                                             map->offset);
+                                break;
                         }
                         drm_free(map, sizeof(*map), DRM_MEM_MAPS);
                 }
@@ -645,6 +649,9 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
                 vma->vm_ops = &drm_vm_ops;
                 break;
         case _DRM_SHM:
+        case _DRM_CONSISTENT:
+                /* Consistent memory is really like shared memory. It's only
+                 * allocate in a different way */
                 vma->vm_ops = &drm_vm_shm_ops;
                 vma->vm_private_data = (void *)map;
                                 /* Don't let this area swap.  Change when