1 files changed, 65 insertions, 0 deletions

diff --git a/include/drm/drm_mem_util.h b/include/drm/drm_mem_util.h
new file mode 100644
index 000000000000..6bd325fedc87
--- /dev/null
+++ b/include/drm/drm_mem_util.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright © 2008 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *     Jesse Barnes <jbarnes@virtuousgeek.org>
+ *
+ */
+#ifndef _DRM_MEM_UTIL_H_
+#define _DRM_MEM_UTIL_H_
+
+#include <linux/vmalloc.h>
+
+static __inline__ void *drm_calloc_large(size_t nmemb, size_t size)
+{
+        if (size != 0 && nmemb > ULONG_MAX / size)
+                return NULL;
+
+        if (size * nmemb <= PAGE_SIZE)
+            return kcalloc(nmemb, size, GFP_KERNEL);
+
+        return __vmalloc(size * nmemb,
+                         GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO, PAGE_KERNEL);
+}
+
+/* Modeled after cairo's malloc_ab, it's like calloc but without the zeroing. */
+static __inline__ void *drm_malloc_ab(size_t nmemb, size_t size)
+{
+        if (size != 0 && nmemb > ULONG_MAX / size)
+                return NULL;
+
+        if (size * nmemb <= PAGE_SIZE)
+            return kmalloc(nmemb * size, GFP_KERNEL);
+
+        return __vmalloc(size * nmemb,
+                         GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL);
+}
+
+static __inline void drm_free_large(void *ptr)
+{
+        if (!is_vmalloc_addr(ptr))
+                return kfree(ptr);
+
+        vfree(ptr);
+}
+
+#endif