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Message-ID: <20121030010409.17788.6745.stgit@promb-2n-dhcp175.eng.vmware.com>
Date: Mon, 29 Oct 2012 18:04:15 -0700
From: George Zhang <georgezhang@...are.com>
To: linux-kernel@...r.kernel.org, georgezhang@...are.com,
virtualization@...ts.linux-foundation.org
Cc: pv-drivers@...are.com, gregkh@...uxfoundation.org
Subject: [PATCH 04/12] VMCI: device driver implementaton.
VMCI driver code implementes both the host and guest personalities of the VMCI driver.
Signed-off-by: George Zhang <georgezhang@...are.com>
---
drivers/misc/vmw_vmci/vmci_driver.c | 159 +++++++++++++++++++++++++++++++++++
drivers/misc/vmw_vmci/vmci_driver.h | 50 +++++++++++
2 files changed, 209 insertions(+), 0 deletions(-)
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 0000000..1ca0c7e
--- /dev/null
+++ b/drivers/misc/vmw_vmci/vmci_driver.c
@@ -0,0 +1,159 @@
+/*
+ * 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;
+ } else {
+ return VMCI_INVALID_ID;
+ }
+}
+EXPORT_SYMBOL_GPL(vmci_get_context_id);
+
+/*
+ * vmci_version() - Returns the version of the driver.
+ *
+ * Returns the version of the VMCI driver.
+ */
+u32 vmci_version(void)
+{
+ return VMCI_VERSION;
+}
+EXPORT_SYMBOL_GPL(vmci_version);
+
+static int __init vmci_core_init(void)
+{
+ int result;
+
+ result = vmci_ctx_init();
+ if (result < VMCI_SUCCESS) {
+ pr_err("Failed to initialize VMCIContext (result=%d).\n",
+ result);
+ return -EINVAL;
+ }
+
+ result = vmci_datagram_init();
+ if (result < VMCI_SUCCESS) {
+ pr_err("Failed to initialize VMCIDatagram (result=%d).\n",
+ result);
+ return -EINVAL;
+ }
+
+ result = vmci_event_init();
+ if (result < VMCI_SUCCESS) {
+ pr_err("Failed to initialize VMCIEvent (result=%d).\n", result);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void __exit vmci_core_exit(void)
+{
+ vmci_event_exit();
+}
+
+static int __init vmci_drv_init(void)
+{
+ int error;
+
+ error = vmci_core_init();
+ if (error)
+ return error;
+
+ 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_core_exit();
+ return -ENODEV;
+ }
+
+ pr_debug("Module is initialized\n");
+ 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_core_exit();
+ pr_debug("Module is unloaded\n");
+}
+module_exit(vmci_drv_exit);
+
+MODULE_AUTHOR("VMware, Inc.");
+MODULE_DESCRIPTION("VMware Virtual Machine Communication Interface.");
+MODULE_VERSION(VMCI_DRIVER_VERSION_STRING);
+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 0000000..f69156a
--- /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 <linux/vmw_vmci_defs.h>
+#include <linux/wait.h>
+
+#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_ */
--
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