linux-imx

/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.

 *

 * Author: Stepan Moskovchenko <stepanm@codeaurora.org>

 *

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

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

 * 02110-1301, USA.

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/errno.h>

#include <linux/io.h>

#include <linux/io-pgtable.h>

#include <linux/interrupt.h>

#include <linux/list.h>

#include <linux/spinlock.h>

#include <linux/slab.h>

#include <linux/iommu.h>

#include <linux/clk.h>

#include <linux/err.h>

#include <linux/of_iommu.h>

​

#include <asm/cacheflush.h>

#include <asm/sizes.h>

​

#include "msm_iommu_hw-8xxx.h"

#include "msm_iommu.h"

​

#define MRC(reg, processor, op1, crn, crm, op2)             \

__asm__ __volatile__ (                          \

"   mrc   "   #processor "," #op1 ", %0,"  #crn "," #crm "," #op2 "\n"  \

: "=r" (reg))

​

/* bitmap of the page sizes currently supported */

#define MSM_IOMMU_PGSIZES   (SZ_4K | SZ_64K | SZ_1M | SZ_16M)

​

DEFINE_SPINLOCK(msm_iommu_lock);

static LIST_HEAD(qcom_iommu_devices);

static struct iommu_ops msm_iommu_ops;

​

struct msm_priv {

    struct list_head list_attached;

    struct iommu_domain domain;

    struct io_pgtable_cfg   cfg;

    struct io_pgtable_ops   *iop;

    struct device       *dev;

    spinlock_t      pgtlock; /* pagetable lock */

};

​

static struct msm_priv *to_msm_priv(struct iommu_domain *dom)