linux-imx

/*

 * VMware VMCI Driver

 *

 * Copyright (C) 2012 VMware, Inc. All rights reserved.

 *

 * 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 version 2 and no later version.

 *

 * 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.

 */

​

#include <linux/vmw_vmci_defs.h>

#include <linux/vmw_vmci_api.h>

#include <linux/completion.h>

#include <linux/hash.h>

#include <linux/kernel.h>

#include <linux/list.h>

#include <linux/module.h>

#include <linux/sched.h>

#include <linux/slab.h>

​

#include "vmci_datagram.h"

#include "vmci_doorbell.h"

#include "vmci_resource.h"

#include "vmci_driver.h"

#include "vmci_route.h"

​

​

#define VMCI_DOORBELL_INDEX_BITS    6

#define VMCI_DOORBELL_INDEX_TABLE_SIZE  (1 << VMCI_DOORBELL_INDEX_BITS)

#define VMCI_DOORBELL_HASH(_idx)    hash_32(_idx, VMCI_DOORBELL_INDEX_BITS)

​

/*

 * DoorbellEntry describes the a doorbell notification handle allocated by the

 * host.

 */

struct dbell_entry {

    struct vmci_resource resource;

    struct hlist_node node;

    struct work_struct work;

    vmci_callback notify_cb;

    void *client_data;

    u32 idx;

    u32 priv_flags;

    bool run_delayed;

    atomic_t active;    /* Only used by guest personality */

};

​

/* The VMCI index table keeps track of currently registered doorbells. */

struct dbell_index_table {

    spinlock_t lock;    /* Index table lock */

    struct hlist_head entries[VMCI_DOORBELL_INDEX_TABLE_SIZE];

};

​

static struct dbell_index_table vmci_doorbell_it = {

    .lock = __SPIN_LOCK_UNLOCKED(vmci_doorbell_it.lock),

};

​

/*