118 lines
3 KiB
C
118 lines
3 KiB
C
|
/*
|
||
|
|
* 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/atomic.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
|
||
|
|
#include "vmci_driver.h"
|
||
|
|
#include "vmci_event.h"
|
||
|
|
|
||
|
|
static bool vmci_disable_host;
|
||
|
|
module_param_named(disable_host, vmci_disable_host, bool, 0);
|
||
|
|
MODULE_PARM_DESC(disable_host,
|
||
|
|
"Disable driver host personality (default=enabled)");
|
||
|
|
|
||
|
|
static bool vmci_disable_guest;
|
||
|
|
module_param_named(disable_guest, vmci_disable_guest, bool, 0);
|
||
|
|
MODULE_PARM_DESC(disable_guest,
|
||
|
|
"Disable driver guest personality (default=enabled)");
|
||
|
|
|
||
|
|
static bool vmci_guest_personality_initialized;
|
||
|
|
static bool vmci_host_personality_initialized;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* vmci_get_context_id() - Gets the current context ID.
|
||
|
|
*
|
||
|
|
* Returns the current context ID. Note that since this is accessed only
|
||
|
|
* from code running in the host, this always returns the host context ID.
|
||
|
|
*/
|
||
|
|
u32 vmci_get_context_id(void)
|
||
|
|
{
|
||
|
|
if (vmci_guest_code_active())
|
||
|
|
return vmci_get_vm_context_id();
|
||
|
|
else if (vmci_host_code_active())
|
||
|
|
return VMCI_HOST_CONTEXT_ID;
|
||
|
|
|
||
|
|
return VMCI_INVALID_ID;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(vmci_get_context_id);
|
||
|
|
|
||
|
|
static int __init vmci_drv_init(void)
|
||
|
|
{
|
||
|
|
int vmci_err;
|
||
|
|
int error;
|
||
|
|
|
||
|
|
vmci_err = vmci_event_init();
|
||
|
|
if (vmci_err < VMCI_SUCCESS) {
|
||
|
|
pr_err("Failed to initialize VMCIEvent (result=%d)\n",
|
||
|
|
vmci_err);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!vmci_disable_guest) {
|
||
|
|
error = vmci_guest_init();
|
||
|
|
if (error) {
|
||
|
|
pr_warn("Failed to initialize guest personality (err=%d)\n",
|
||
|
|
error);
|
||
|
|
} else {
|
||
|
|
vmci_guest_personality_initialized = true;
|
||
|
|
pr_info("Guest personality initialized and is %s\n",
|
||
|
|
vmci_guest_code_active() ?
|
||
|
|
"active" : "inactive");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!vmci_disable_host) {
|
||
|
|
error = vmci_host_init();
|
||
|
|
if (error) {
|
||
|
|
pr_warn("Unable to initialize host personality (err=%d)\n",
|
||
|
|
error);
|
||
|
|
} else {
|
||
|
|
vmci_host_personality_initialized = true;
|
||
|
|
pr_info("Initialized host personality\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!vmci_guest_personality_initialized &&
|
||
|
|
!vmci_host_personality_initialized) {
|
||
|
|
vmci_event_exit();
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
module_init(vmci_drv_init);
|
||
|
|
|
||
|
|
static void __exit vmci_drv_exit(void)
|
||
|
|
{
|
||
|
|
if (vmci_guest_personality_initialized)
|
||
|
|
vmci_guest_exit();
|
||
|
|
|
||
|
|
if (vmci_host_personality_initialized)
|
||
|
|
vmci_host_exit();
|
||
|
|
|
||
|
|
vmci_event_exit();
|
||
|
|
}
|
||
|
|
module_exit(vmci_drv_exit);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("VMware, Inc.");
|
||
|
|
MODULE_DESCRIPTION("VMware Virtual Machine Communication Interface.");
|
||
|
|
MODULE_VERSION("1.1.6.0-k");
|
||
|
|
MODULE_LICENSE("GPL v2");
|