text: /*-
   *Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
   * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   * All Rights Reserved.
   *
   * 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
   * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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:
   *    Rickard E. (Rik) Faith <faith@valinux.com>
   *    Gareth Hughes <gareth@valinux.com>
   *
   */
  
  /** @file drm_memory.c
   * Wrappers for kernel memory allocation routines, and MTRR management support.
   *
   * This file previously implemented a memory consumption tracking system using
   * the "area" argument for various different types of allocations, but that
   * has been stripped out for now.
   */
  
  #include "drmP.h"
  
  void*
  drm_alloc(size_t size)
  {
  	return (malloc(size, M_DRM, M_NOWAIT));
  }
  
  void *
  drm_calloc(size_t nmemb, size_t size)
  {
  	if (nmemb == 0 || SIZE_MAX / nmemb < size)
  		return (NULL);
  	else
  		return malloc(size * nmemb, M_DRM, M_NOWAIT | M_ZERO);
  }
  
  void *
  drm_realloc(void *oldpt, size_t oldsize, size_t size)
  {
  	void *pt;
  
  	pt = malloc(size, M_DRM, M_NOWAIT);
  	if (pt == NULL)
  		return NULL;
  	if (oldpt && oldsize) {
  		memcpy(pt, oldpt, min(oldsize, size));
  		free(oldpt, M_DRM);
  	}
  	return pt;
  }
  
  void
  drm_free(void *pt)
  {
  	if (pt != NULL)
  		free(pt, M_DRM);
  }
  
  /* Inline replacements for DRM_IOREMAP macros */
  void
  drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev)
  {
  	DRM_DEBUG("offset: 0x%x size: 0x%x type: %d\n", map->offset, map->size,
  	    map->type);
  
  	/* default to failure. */
  	map->handle = 0;
  
  	if (map->type == _DRM_AGP || map->type == _DRM_FRAME_BUFFER) {
  	/*
  	 * there can be multiple agp maps in the same BAR, agp also
  	 * quite possibly isn't the same as the vga device, just try
  	 * to map it.
  	 */
  		DRM_DEBUG("AGP map\n");
  		map->bst = dev->bst;
  		if (bus_space_map(map->bst, map->offset,
  		    map->size, BUS_SPACE_MAP_LINEAR |
  		    BUS_SPACE_MAP_PREFETCHABLE, &map->bsh)) {
  			DRM_ERROR("ioremap fail\n");
  			return;
  		}
  		/* handles are still supposed to be kernel virtual addresses */
  		map->handle = bus_space_vaddr(map->bst, map->bsh);
  	}
  }
  
  void
  drm_core_ioremapfree(struct drm_local_map *map)
  {
  	if (map->handle && map->size && (map->type == _DRM_AGP ||
  	    map->type == _DRM_FRAME_BUFFER)) {
  		bus_space_unmap(map->bst, map->bsh, map->size);
  		map->handle = 0;
  	}
  }
  
  int
  drm_mtrr_add(unsigned long offset, size_t size, int flags)
  {
  #ifndef DRM_NO_MTRR
  	int act;
  	struct mem_range_desc mrdesc;
  
  	mrdesc.mr_base = offset;
  	mrdesc.mr_len = size;
  	mrdesc.mr_flags = flags;
  	act = MEMRANGE_SET_UPDATE;
  	strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
  	return mem_range_attr_set(&mrdesc, &act);
  #else
  	return 0;
  #endif
  }
  
  int
  drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags)
  {
  #ifndef DRM_NO_MTRR
  	int act;
  	struct mem_range_desc mrdesc;
  
  	mrdesc.mr_base = offset;
  	mrdesc.mr_len = size;
  	mrdesc.mr_flags = flags;
  	act = MEMRANGE_SET_REMOVE;
  	strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
  	return mem_range_attr_set(&mrdesc, &act);
  #else
  	return 0;
  #endif
  }
  