From 197dbaaabd51c170f9b77bd1c401d4ea0361bb7b Mon Sep 17 00:00:00 2001 From: George Zhang Date: Tue, 8 Jan 2013 15:54:10 -0800 Subject: [PATCH] VMCI: device driver implementaton. VMCI driver code implementes both the host and guest personalities of the VMCI driver. Signed-off-by: George Zhang Acked-by: Andy king Acked-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/misc/vmw_vmci/vmci_driver.c | 117 ++++++++++++++++++++++++++++ drivers/misc/vmw_vmci/vmci_driver.h | 50 ++++++++++++ 2 files changed, 167 insertions(+) create mode 100644 drivers/misc/vmw_vmci/vmci_driver.c create mode 100644 drivers/misc/vmw_vmci/vmci_driver.h diff --git a/drivers/misc/vmw_vmci/vmci_driver.c b/drivers/misc/vmw_vmci/vmci_driver.c new file mode 100644 index 000000000000..7b3fce2da6c3 --- /dev/null +++ b/drivers/misc/vmw_vmci/vmci_driver.c @@ -0,0 +1,117 @@ +/* + * 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 +#include +#include +#include +#include +#include + +#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("1.0.0.0-k"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/misc/vmw_vmci/vmci_driver.h b/drivers/misc/vmw_vmci/vmci_driver.h new file mode 100644 index 000000000000..f69156a1f30c --- /dev/null +++ b/drivers/misc/vmw_vmci/vmci_driver.h @@ -0,0 +1,50 @@ +/* + * 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. + */ + +#ifndef _VMCI_DRIVER_H_ +#define _VMCI_DRIVER_H_ + +#include +#include + +#include "vmci_queue_pair.h" +#include "vmci_context.h" + +enum vmci_obj_type { + VMCIOBJ_VMX_VM = 10, + VMCIOBJ_CONTEXT, + VMCIOBJ_SOCKET, + VMCIOBJ_NOT_SET, +}; + +/* For storing VMCI structures in file handles. */ +struct vmci_obj { + void *ptr; + enum vmci_obj_type type; +}; + +u32 vmci_get_context_id(void); +int vmci_send_datagram(struct vmci_datagram *dg); + +int vmci_host_init(void); +void vmci_host_exit(void); +bool vmci_host_code_active(void); + +int vmci_guest_init(void); +void vmci_guest_exit(void); +bool vmci_guest_code_active(void); +u32 vmci_get_vm_context_id(void); + +#endif /* _VMCI_DRIVER_H_ */ -- 2.39.2