/*
   * 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 > SIZE_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 > SIZE_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_malloc_gfp(size_t nmemb, size_t size, gfp_t gfp)
  {
  	if (size != 0 && nmemb > SIZE_MAX / size)
  		return NULL;
  
  	if (size * nmemb <= PAGE_SIZE)
  		return kmalloc(nmemb * size, gfp);
  
  	if (gfp & __GFP_RECLAIMABLE) {
  		void *ptr = kmalloc(nmemb * size,
  				    gfp | __GFP_NOWARN | __GFP_NORETRY);
  		if (ptr)
  			return ptr;
  	}
  
  	return __vmalloc(size * nmemb,
  			 gfp | __GFP_HIGHMEM, PAGE_KERNEL);
  }

  static __inline void drm_free_large(void *ptr)
  {

  	kvfree(ptr);

  }
  
  #endif