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kernel
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linux
VMCI: device driver implementaton.
VMCI driver code implementes both the host and guest personalities of the VMCI driver.
Signed-off-by: George Zhang <georgezhang@vmware.com>
Acked-by: Andy king <acking@vmware.com>
Acked-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
George Zhang
and committed by
Greg Kroah-Hartman
197dbaaa
83e2ec76
+167
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drivers/misc/vmw_vmci/vmci_driver.c
+117
drivers/misc/vmw_vmci/vmci_driver.c
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/*
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* VMware VMCI Driver
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*
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* Copyright (C) 2012 VMware, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 and no later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <linux/vmw_vmci_defs.h>
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#include <linux/vmw_vmci_api.h>
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#include <linux/atomic.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include "vmci_driver.h"
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#include "vmci_event.h"
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static bool vmci_disable_host;
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module_param_named(disable_host, vmci_disable_host, bool, 0);
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MODULE_PARM_DESC(disable_host,
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"Disable driver host personality (default=enabled)");
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static bool vmci_disable_guest;
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module_param_named(disable_guest, vmci_disable_guest, bool, 0);
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MODULE_PARM_DESC(disable_guest,
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"Disable driver guest personality (default=enabled)");
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static bool vmci_guest_personality_initialized;
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static bool vmci_host_personality_initialized;
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/*
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* vmci_get_context_id() - Gets the current context ID.
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*
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* Returns the current context ID. Note that since this is accessed only
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* from code running in the host, this always returns the host context ID.
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*/
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u32 vmci_get_context_id(void)
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{
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if (vmci_guest_code_active())
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return vmci_get_vm_context_id();
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else if (vmci_host_code_active())
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return VMCI_HOST_CONTEXT_ID;
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return VMCI_INVALID_ID;
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}
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EXPORT_SYMBOL_GPL(vmci_get_context_id);
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static int __init vmci_drv_init(void)
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{
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int vmci_err;
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int error;
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vmci_err = vmci_event_init();
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if (vmci_err < VMCI_SUCCESS) {
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pr_err("Failed to initialize VMCIEvent (result=%d)\n",
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vmci_err);
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return -EINVAL;
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}
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if (!vmci_disable_guest) {
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error = vmci_guest_init();
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if (error) {
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pr_warn("Failed to initialize guest personality (err=%d)\n",
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error);
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} else {
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vmci_guest_personality_initialized = true;
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pr_info("Guest personality initialized and is %s\n",
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vmci_guest_code_active() ?
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"active" : "inactive");
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}
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}
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if (!vmci_disable_host) {
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error = vmci_host_init();
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if (error) {
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pr_warn("Unable to initialize host personality (err=%d)\n",
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error);
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} else {
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vmci_host_personality_initialized = true;
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pr_info("Initialized host personality\n");
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}
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}
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if (!vmci_guest_personality_initialized &&
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!vmci_host_personality_initialized) {
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vmci_event_exit();
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return -ENODEV;
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}
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return 0;
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}
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module_init(vmci_drv_init);
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static void __exit vmci_drv_exit(void)
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{
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if (vmci_guest_personality_initialized)
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vmci_guest_exit();
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if (vmci_host_personality_initialized)
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vmci_host_exit();
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vmci_event_exit();
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}
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module_exit(vmci_drv_exit);
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MODULE_AUTHOR("VMware, Inc.");
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MODULE_DESCRIPTION("VMware Virtual Machine Communication Interface.");
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MODULE_VERSION("1.0.0.0-k");
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MODULE_LICENSE("GPL v2");
+50
drivers/misc/vmw_vmci/vmci_driver.h
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drivers/misc/vmw_vmci/vmci_driver.h
···
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/*
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* VMware VMCI Driver
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*
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* Copyright (C) 2012 VMware, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 and no later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#ifndef _VMCI_DRIVER_H_
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#define _VMCI_DRIVER_H_
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#include <linux/vmw_vmci_defs.h>
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#include <linux/wait.h>
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#include "vmci_queue_pair.h"
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#include "vmci_context.h"
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enum vmci_obj_type {
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VMCIOBJ_VMX_VM = 10,
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VMCIOBJ_CONTEXT,
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VMCIOBJ_SOCKET,
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VMCIOBJ_NOT_SET,
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};
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/* For storing VMCI structures in file handles. */
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struct vmci_obj {
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void *ptr;
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enum vmci_obj_type type;
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};
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u32 vmci_get_context_id(void);
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int vmci_send_datagram(struct vmci_datagram *dg);
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int vmci_host_init(void);
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void vmci_host_exit(void);
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bool vmci_host_code_active(void);
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int vmci_guest_init(void);
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void vmci_guest_exit(void);
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bool vmci_guest_code_active(void);
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u32 vmci_get_vm_context_id(void);
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#endif /* _VMCI_DRIVER_H_ */