linux-imx

/*

 * Contiguous Memory Allocator

 *

 * Copyright (c) 2010-2011 by Samsung Electronics.

 * Copyright IBM Corporation, 2013

 * Copyright LG Electronics Inc., 2014

 * Written by:

 *  Marek Szyprowski <m.szyprowski@samsung.com>

 *  Michal Nazarewicz <mina86@mina86.com>

 *  Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

 *  Joonsoo Kim <iamjoonsoo.kim@lge.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation; either version 2 of the

 * License or (at your optional) any later version of the license.

 */

​

#define pr_fmt(fmt) "cma: " fmt

​

#ifdef CONFIG_CMA_DEBUG

#ifndef DEBUG

#  define DEBUG

#endif

#endif

#define CREATE_TRACE_POINTS

​

#include <linux/memblock.h>

#include <linux/err.h>

#include <linux/mm.h>

#include <linux/mutex.h>

#include <linux/sizes.h>

#include <linux/slab.h>

#include <linux/log2.h>

#include <linux/cma.h>

#include <linux/highmem.h>

#include <linux/io.h>

#include <linux/kmemleak.h>

#include <trace/events/cma.h>

​

#include "cma.h"

​

struct cma cma_areas[MAX_CMA_AREAS];

unsigned cma_area_count;

static DEFINE_MUTEX(cma_mutex);

​

phys_addr_t cma_get_base(const struct cma *cma)

{

    return PFN_PHYS(cma->base_pfn);

}

​

unsigned long cma_get_size(const struct cma *cma)

{

    return cma->count << PAGE_SHIFT;

}

​

const char *cma_get_name(const struct cma *cma)

{

    return cma->name ? cma->name : "(undefined)";

}

​

static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,

                         unsigned int align_order)