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/* $OpenBSD: drm_memory.c,v 1.27 2015/06/04 06:07:23 jsg Exp $ */
/*-
*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"
#if !defined(__amd64__) && !defined(__i386__)
#define DRM_NO_MTRR 1
#endif
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 mallocarray(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, 0);
}
return pt;
}
void
drm_free(void *pt)
{
if (pt != NULL)
free(pt, M_DRM, 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
}
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