Line data    Source code

       1             : /* $OpenBSD: drm_memory.c,v 1.27 2015/06/04 06:07:23 jsg Exp $ */
       2             : /*-
       3             :  *Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
       4             :  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
       5             :  * All Rights Reserved.
       6             :  *
       7             :  * Permission is hereby granted, free of charge, to any person obtaining a
       8             :  * copy of this software and associated documentation files (the "Software"),
       9             :  * to deal in the Software without restriction, including without limitation
      10             :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      11             :  * and/or sell copies of the Software, and to permit persons to whom the
      12             :  * Software is furnished to do so, subject to the following conditions:
      13             :  *
      14             :  * The above copyright notice and this permission notice (including the next
      15             :  * paragraph) shall be included in all copies or substantial portions of the
      16             :  * Software.
      17             :  *
      18             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      19             :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      20             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
      21             :  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
      22             :  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
      23             :  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
      24             :  * OTHER DEALINGS IN THE SOFTWARE.
      25             :  *
      26             :  * Authors:
      27             :  *    Rickard E. (Rik) Faith <faith@valinux.com>
      28             :  *    Gareth Hughes <gareth@valinux.com>
      29             :  *
      30             :  */
      31             : 
      32             : /** @file drm_memory.c
      33             :  * Wrappers for kernel memory allocation routines, and MTRR management support.
      34             :  *
      35             :  * This file previously implemented a memory consumption tracking system using
      36             :  * the "area" argument for various different types of allocations, but that
      37             :  * has been stripped out for now.
      38             :  */
      39             : 
      40             : #include "drmP.h"
      41             : 
      42             : #if !defined(__amd64__) && !defined(__i386__)
      43             : #define DRM_NO_MTRR     1
      44             : #endif
      45             : 
      46             : void*
      47           0 : drm_alloc(size_t size)
      48             : {
      49           0 :         return (malloc(size, M_DRM, M_NOWAIT));
      50             : }
      51             : 
      52             : void *
      53           0 : drm_calloc(size_t nmemb, size_t size)
      54             : {
      55           0 :         if (nmemb == 0 || SIZE_MAX / nmemb < size)
      56           0 :                 return (NULL);
      57             :         else
      58           0 :                 return mallocarray(size, nmemb, M_DRM, M_NOWAIT | M_ZERO);
      59           0 : }
      60             : 
      61             : void *
      62           0 : drm_realloc(void *oldpt, size_t oldsize, size_t size)
      63             : {
      64             :         void *pt;
      65             : 
      66           0 :         pt = malloc(size, M_DRM, M_NOWAIT);
      67           0 :         if (pt == NULL)
      68           0 :                 return NULL;
      69           0 :         if (oldpt && oldsize) {
      70           0 :                 memcpy(pt, oldpt, min(oldsize, size));
      71           0 :                 free(oldpt, M_DRM, 0);
      72           0 :         }
      73           0 :         return pt;
      74           0 : }
      75             : 
      76             : void
      77           0 : drm_free(void *pt)
      78             : {
      79           0 :         if (pt != NULL)
      80           0 :                 free(pt, M_DRM, 0);
      81           0 : }
      82             : 
      83             : int
      84           0 : drm_mtrr_add(unsigned long offset, size_t size, int flags)
      85             : {
      86             : #ifndef DRM_NO_MTRR
      87           0 :         int act;
      88           0 :         struct mem_range_desc mrdesc;
      89             : 
      90           0 :         mrdesc.mr_base = offset;
      91           0 :         mrdesc.mr_len = size;
      92           0 :         mrdesc.mr_flags = flags;
      93           0 :         act = MEMRANGE_SET_UPDATE;
      94           0 :         strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
      95           0 :         return mem_range_attr_set(&mrdesc, &act);
      96             : #else
      97             :         return 0;
      98             : #endif
      99           0 : }
     100             : 
     101             : int
     102           0 : drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags)
     103             : {
     104             : #ifndef DRM_NO_MTRR
     105           0 :         int act;
     106           0 :         struct mem_range_desc mrdesc;
     107             : 
     108           0 :         mrdesc.mr_base = offset;
     109           0 :         mrdesc.mr_len = size;
     110           0 :         mrdesc.mr_flags = flags;
     111           0 :         act = MEMRANGE_SET_REMOVE;
     112           0 :         strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
     113           0 :         return mem_range_attr_set(&mrdesc, &act);
     114             : #else
     115             :         return 0;
     116             : #endif
     117           0 : }