linux-imx

/*

 * Copyright (C) 2010-2012 Advanced Micro Devices, Inc.

 * Author: Joerg Roedel <jroedel@suse.de>

 *

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

 * under the terms of the GNU General Public License 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

 */

​

#define pr_fmt(fmt)     "AMD-Vi: " fmt

​

#include <linux/mmu_notifier.h>

#include <linux/amd-iommu.h>

#include <linux/mm_types.h>

#include <linux/profile.h>

#include <linux/module.h>

#include <linux/sched.h>

#include <linux/sched/mm.h>

#include <linux/iommu.h>

#include <linux/wait.h>

#include <linux/pci.h>

#include <linux/gfp.h>

​

#include "amd_iommu_types.h"

#include "amd_iommu_proto.h"

​

MODULE_LICENSE("GPL v2");

MODULE_AUTHOR("Joerg Roedel <jroedel@suse.de>");

​

#define MAX_DEVICES     0x10000

#define PRI_QUEUE_SIZE      512

​

struct pri_queue {

    atomic_t inflight;

    bool finish;

    int status;

};

​

struct pasid_state {

    struct list_head list;          /* For global state-list */

    atomic_t count;             /* Reference count */

    unsigned mmu_notifier_count;        /* Counting nested mmu_notifier

                           calls */

    struct mm_struct *mm;           /* mm_struct for the faults */

    struct mmu_notifier mn;                 /* mmu_notifier handle */

    struct pri_queue pri[PRI_QUEUE_SIZE];   /* PRI tag states */

    struct device_state *device_state;  /* Link to our device_state */

    int pasid;              /* PASID index */

    bool invalid;               /* Used during setup and

                           teardown of the pasid */

    spinlock_t lock;            /* Protect pri_queues and

                           mmu_notifer_count */

    wait_queue_head_t wq;           /* To wait for count == 0 */

};