projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 685a6bf8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 197dbaaa GZ |
2 | /* |
| 3 | * VMware VMCI Driver | |
| 4 | * | |
| 5 | * Copyright (C) 2012 VMware, Inc. All rights reserved. | |
| 197dbaaa GZ |
6 | */ |
| 7 | ||
| 8 | #include <linux/vmw_vmci_defs.h> | |
| 9 | #include <linux/vmw_vmci_api.h> | |
| 10 | #include <linux/atomic.h> | |
| 11 | #include <linux/kernel.h> | |
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/init.h> | |
| 14 | ||
| 15 | #include "vmci_driver.h" | |
| 16 | #include "vmci_event.h" | |
| 17 | ||
| 18 | static bool vmci_disable_host; | |
| 19 | module_param_named(disable_host, vmci_disable_host, bool, 0); | |
| 20 | MODULE_PARM_DESC(disable_host, | |
| 21 | "Disable driver host personality (default=enabled)"); | |
| 22 | ||
| 23 | static bool vmci_disable_guest; | |
| 24 | module_param_named(disable_guest, vmci_disable_guest, bool, 0); | |
| 25 | MODULE_PARM_DESC(disable_guest, | |
| 26 | "Disable driver guest personality (default=enabled)"); | |
| 27 | ||
| 28 | static bool vmci_guest_personality_initialized; | |
| 29 | static bool vmci_host_personality_initialized; | |
| 30 | ||
| 31 | /* | |
| 32 | * vmci_get_context_id() - Gets the current context ID. | |
| 33 | * | |
| 34 | * Returns the current context ID. Note that since this is accessed only | |
| 35 | * from code running in the host, this always returns the host context ID. | |
| 36 | */ | |
| 37 | u32 vmci_get_context_id(void) | |
| 38 | { | |
| 39 | if (vmci_guest_code_active()) | |
| 40 | return vmci_get_vm_context_id(); | |
| 41 | else if (vmci_host_code_active()) | |
| 42 | return VMCI_HOST_CONTEXT_ID; | |
| 43 | ||
| 44 | return VMCI_INVALID_ID; | |
| 45 | } | |
| 46 | EXPORT_SYMBOL_GPL(vmci_get_context_id); | |
| 47 | ||
| 48 | static int __init vmci_drv_init(void) | |
| 49 | { | |
| 50 | int vmci_err; | |
| 51 | int error; | |
| 52 | ||
| 53 | vmci_err = vmci_event_init(); | |
| 54 | if (vmci_err < VMCI_SUCCESS) { | |
| 55 | pr_err("Failed to initialize VMCIEvent (result=%d)\n", | |
| 56 | vmci_err); | |
| 57 | return -EINVAL; | |
| 58 | } | |
| 59 | ||
| 60 | if (!vmci_disable_guest) { | |
| 61 | error = vmci_guest_init(); | |
| 62 | if (error) { | |
| 63 | pr_warn("Failed to initialize guest personality (err=%d)\n", | |
| 64 | error); | |
| 65 | } else { | |
| 66 | vmci_guest_personality_initialized = true; | |
| 67 | pr_info("Guest personality initialized and is %s\n", | |
| 68 | vmci_guest_code_active() ? | |
| 69 | "active" : "inactive"); | |
| 70 | } | |
| 71 | } | |
| 72 | ||
| 73 | if (!vmci_disable_host) { | |
| 74 | error = vmci_host_init(); | |
| 75 | if (error) { | |
| 76 | pr_warn("Unable to initialize host personality (err=%d)\n", | |
| 77 | error); | |
| 78 | } else { | |
| 79 | vmci_host_personality_initialized = true; | |
| 80 | pr_info("Initialized host personality\n"); | |
| 81 | } | |
| 82 | } | |
| 83 | ||
| 84 | if (!vmci_guest_personality_initialized && | |
| 85 | !vmci_host_personality_initialized) { | |
| 86 | vmci_event_exit(); | |
| 87 | return -ENODEV; | |
| 88 | } | |
| 89 | ||
| 90 | return 0; | |
| 91 | } | |
| 92 | module_init(vmci_drv_init); | |
| 93 | ||
| 94 | static void __exit vmci_drv_exit(void) | |
| 95 | { | |
| 96 | if (vmci_guest_personality_initialized) | |
| 97 | vmci_guest_exit(); | |
| 98 | ||
| 99 | if (vmci_host_personality_initialized) | |
| 100 | vmci_host_exit(); | |
| 101 | ||
| 102 | vmci_event_exit(); | |
| 103 | } | |
| 104 | module_exit(vmci_drv_exit); | |
| 105 | ||
| 106 | MODULE_AUTHOR("VMware, Inc."); | |
| 107 | MODULE_DESCRIPTION("VMware Virtual Machine Communication Interface."); | |
| 11924ba5 | 108 | MODULE_VERSION("1.1.6.0-k"); |
| 197dbaaa | 109 | MODULE_LICENSE("GPL v2"); |