linux-imx

/*

 * Copyright (c) 2006, Intel Corporation.

 *

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

 * under the terms and conditions of the GNU General Public License,

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

 *

 * This program is distributed in the hope 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., 59 Temple

 * Place - Suite 330, Boston, MA 02111-1307 USA.

 *

 * Copyright (C) 2006-2008 Intel Corporation

 * Author: Ashok Raj <ashok.raj@intel.com>

 * Author: Shaohua Li <shaohua.li@intel.com>

 * Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>

 *

 * This file implements early detection/parsing of Remapping Devices

 * reported to OS through BIOS via DMA remapping reporting (DMAR) ACPI

 * tables.

 *

 * These routines are used by both DMA-remapping and Interrupt-remapping

 */

​

#define pr_fmt(fmt)     "DMAR: " fmt

​

#include <linux/pci.h>

#include <linux/dmar.h>

#include <linux/iova.h>

#include <linux/intel-iommu.h>

#include <linux/timer.h>

#include <linux/irq.h>

#include <linux/interrupt.h>

#include <linux/tboot.h>

#include <linux/dmi.h>

#include <linux/slab.h>

#include <linux/iommu.h>

#include <linux/numa.h>

#include <asm/irq_remapping.h>

#include <asm/iommu_table.h>

​

#include "irq_remapping.h"

​

typedef int (*dmar_res_handler_t)(struct acpi_dmar_header *, void *);

struct dmar_res_callback {

    dmar_res_handler_t  cb[ACPI_DMAR_TYPE_RESERVED];

    void            *arg[ACPI_DMAR_TYPE_RESERVED];

    bool            ignore_unhandled;

    bool            print_entry;

};

​

/*

 * Assumptions:

 * 1) The hotplug framework guarentees that DMAR unit will be hot-added

 *    before IO devices managed by that unit.

 * 2) The hotplug framework guarantees that DMAR unit will be hot-removed

 *    after IO devices managed by that unit.

 * 3) Hotplug events are rare.

 *