gma500: allow the creation of 'stolen' memory objects

For things like cursors and many kinds of framebuffer set up we are actually
best using the stolen memory when possible.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/gma500/gem.c b/drivers/staging/gma500/gem.c
index d7b74b6..65fdd6b 100644 (file)
--- a/drivers/staging/gma500/gem.c
+++ b/drivers/staging/gma500/gem.c
@@ -251,6 +251,21 @@ fail:
        }
 }
 
+static int psb_gem_create_stolen(struct drm_file *file, struct drm_device *dev,
+                                               int size, u32 *handle)
+{
+       struct gtt_range *gtt = psb_gtt_alloc_range(dev, size, "gem", 1);
+       if (gtt == NULL)
+               return -ENOMEM;
+       if (drm_gem_private_object_init(dev, &gtt->gem, size) != 0)
+               goto free_gtt;
+       if (drm_gem_handle_create(file, &gtt->gem, handle) == 0)
+               return 0;
+free_gtt:
+       psb_gtt_free_range(dev, gtt);
+       return -ENOMEM;
+}
+
 /*
  *     GEM interfaces for our specific client
  */
@@ -258,6 +273,15 @@ int psb_gem_create_ioctl(struct drm_device *dev, void *data,
                                        struct drm_file *file)
 {
        struct drm_psb_gem_create *args = data;
+       int ret;
+       if (args->flags & PSB_GEM_CREATE_STOLEN) {
+               ret = psb_gem_create_stolen(file, dev, args->size,
+                                                       &args->handle);
+               if (ret == 0)
+                       return 0;
+               /* Fall throguh */
+               args->flags &= ~PSB_GEM_CREATE_STOLEN;
+       }
        return psb_gem_create(file, dev, args->size, &args->handle);
 }
 

diff --git a/drivers/staging/gma500/psb_drm.h b/drivers/staging/gma500/psb_drm.h
index 70115a9..0da8468 100644 (file)
--- a/drivers/staging/gma500/psb_drm.h
+++ b/drivers/staging/gma500/psb_drm.h
@@ -189,7 +189,8 @@ struct psb_drm_dpu_rect {
 struct drm_psb_gem_create {
        __u64 size;
        __u32 handle;
-       __u32 pad;
+       __u32 flags;
+#define PSB_GEM_CREATE_STOLEN          1       /* Stolen memory can be used */
 };
 
 #define PSB_2D_OP_BUFLEN               16