George Zhang | 197dbaa | 2013-01-08 15:54:10 -0800 | [diff] [blame] | 1 | /* |
| 2 | * VMware VMCI Driver |
| 3 | * |
| 4 | * Copyright (C) 2012 VMware, Inc. All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation version 2 and no later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 12 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * for more details. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/vmw_vmci_defs.h> |
| 17 | #include <linux/vmw_vmci_api.h> |
| 18 | #include <linux/atomic.h> |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/init.h> |
| 22 | |
| 23 | #include "vmci_driver.h" |
| 24 | #include "vmci_event.h" |
| 25 | |
| 26 | static bool vmci_disable_host; |
| 27 | module_param_named(disable_host, vmci_disable_host, bool, 0); |
| 28 | MODULE_PARM_DESC(disable_host, |
| 29 | "Disable driver host personality (default=enabled)"); |
| 30 | |
| 31 | static bool vmci_disable_guest; |
| 32 | module_param_named(disable_guest, vmci_disable_guest, bool, 0); |
| 33 | MODULE_PARM_DESC(disable_guest, |
| 34 | "Disable driver guest personality (default=enabled)"); |
| 35 | |
| 36 | static bool vmci_guest_personality_initialized; |
| 37 | static bool vmci_host_personality_initialized; |
| 38 | |
| 39 | /* |
| 40 | * vmci_get_context_id() - Gets the current context ID. |
| 41 | * |
| 42 | * Returns the current context ID. Note that since this is accessed only |
| 43 | * from code running in the host, this always returns the host context ID. |
| 44 | */ |
| 45 | u32 vmci_get_context_id(void) |
| 46 | { |
| 47 | if (vmci_guest_code_active()) |
| 48 | return vmci_get_vm_context_id(); |
| 49 | else if (vmci_host_code_active()) |
| 50 | return VMCI_HOST_CONTEXT_ID; |
| 51 | |
| 52 | return VMCI_INVALID_ID; |
| 53 | } |
| 54 | EXPORT_SYMBOL_GPL(vmci_get_context_id); |
| 55 | |
| 56 | static int __init vmci_drv_init(void) |
| 57 | { |
| 58 | int vmci_err; |
| 59 | int error; |
| 60 | |
| 61 | vmci_err = vmci_event_init(); |
| 62 | if (vmci_err < VMCI_SUCCESS) { |
| 63 | pr_err("Failed to initialize VMCIEvent (result=%d)\n", |
| 64 | vmci_err); |
| 65 | return -EINVAL; |
| 66 | } |
| 67 | |
| 68 | if (!vmci_disable_guest) { |
| 69 | error = vmci_guest_init(); |
| 70 | if (error) { |
| 71 | pr_warn("Failed to initialize guest personality (err=%d)\n", |
| 72 | error); |
| 73 | } else { |
| 74 | vmci_guest_personality_initialized = true; |
| 75 | pr_info("Guest personality initialized and is %s\n", |
| 76 | vmci_guest_code_active() ? |
| 77 | "active" : "inactive"); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | if (!vmci_disable_host) { |
| 82 | error = vmci_host_init(); |
| 83 | if (error) { |
| 84 | pr_warn("Unable to initialize host personality (err=%d)\n", |
| 85 | error); |
| 86 | } else { |
| 87 | vmci_host_personality_initialized = true; |
| 88 | pr_info("Initialized host personality\n"); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | if (!vmci_guest_personality_initialized && |
| 93 | !vmci_host_personality_initialized) { |
| 94 | vmci_event_exit(); |
| 95 | return -ENODEV; |
| 96 | } |
| 97 | |
| 98 | return 0; |
| 99 | } |
| 100 | module_init(vmci_drv_init); |
| 101 | |
| 102 | static void __exit vmci_drv_exit(void) |
| 103 | { |
| 104 | if (vmci_guest_personality_initialized) |
| 105 | vmci_guest_exit(); |
| 106 | |
| 107 | if (vmci_host_personality_initialized) |
| 108 | vmci_host_exit(); |
| 109 | |
| 110 | vmci_event_exit(); |
| 111 | } |
| 112 | module_exit(vmci_drv_exit); |
| 113 | |
| 114 | MODULE_AUTHOR("VMware, Inc."); |
| 115 | MODULE_DESCRIPTION("VMware Virtual Machine Communication Interface."); |
Andy King | 6d6dfb4 | 2013-08-23 09:22:14 -0700 | [diff] [blame] | 116 | MODULE_VERSION("1.1.0.0-k"); |
George Zhang | 197dbaa | 2013-01-08 15:54:10 -0800 | [diff] [blame] | 117 | MODULE_LICENSE("GPL v2"); |