DM USB: xHCI: add xHCI de-initialization support

add support for xHCI de-initialization when the guest
dose shutdown or reboot.

Change-Id: I3dfc1ed1a905b455ef455dff2065e872aa5c1ef8
Signed-off-by: Wu, Xiaoguang <xiaoguang.wu@intel.com>
Reviewed-by: Shuo Liu <shuo.a.liu@intel.com>
Reviewed-by: Yu Wang <yu1.wang@intel.com>
Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

devicemodel/hw/pci/xhci.c

@@ -3321,9 +3321,44 @@ pci_xhci_init(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
 	return error;
 }
 
+static void
+pci_xhci_deinit(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
+{
+	int i;
+	struct pci_xhci_vdev *xdev;
+	struct pci_xhci_dev_emu *de;
+
+	assert(dev);
+	xdev = dev->arg;
+
+	UPRINTF(LINF, "de-initialization\r\n");
+	assert(xdev);
+	assert(xdev->devices);
+
+	for (i = 1; i <= XHCI_MAX_DEVS; ++i) {
+		de = xdev->devices[i];
+		if (de) {
+			xdev->devices[i] = NULL;
+			pci_xhci_dev_destroy(de);
+			xdev->ndevices--;
+		}
+	}
+
+	free(xdev->devices);
+	free(xdev->slots);
+	free(xdev->portregs);
+
+	usb_dev_sys_deinit();
+
+	pthread_mutex_destroy(&xdev->mtx);
+	free(xdev);
+	xhci_in_use = 0;
+}
+
 struct pci_vdev_ops pci_ops_xhci = {
 	.class_name	= "xhci",
 	.vdev_init	= pci_xhci_init,
+	.vdev_deinit	= pci_xhci_deinit,
 	.vdev_barwrite	= pci_xhci_write,
 	.vdev_barread	= pci_xhci_read
 };

devicemodel/hw/platform/usb_pmapper.c

@@ -937,6 +937,11 @@ usb_dev_sys_init(usb_dev_sys_cb conn_cb, usb_dev_sys_cb disconn_cb,
 		goto errout;
 	}
 
+	/* this is for guest rebooting purpose */
+	g_ctx.conn_handle = native_conn_handle;
+	g_ctx.disconn_handle = native_disconn_handle;
+	g_ctx.thread_exit = 0;
+
 	if (pthread_create(&g_ctx.thread, NULL, usb_dev_sys_thread, NULL)) {
 		libusb_hotplug_deregister_callback(g_ctx.libusb_ctx,
 				native_conn_handle);
@@ -953,3 +958,21 @@ usb_dev_sys_init(usb_dev_sys_cb conn_cb, usb_dev_sys_cb disconn_cb,
 	g_ctx.libusb_ctx = NULL;
 	return -1;
 }
+
+void
+usb_dev_sys_deinit(void)
+{
+	if (!g_ctx.libusb_ctx)
+		return;
+
+	UPRINTF(LINF, "port-mapper de-initialization\r\n");
+	libusb_hotplug_deregister_callback(g_ctx.libusb_ctx, g_ctx.conn_handle);
+	libusb_hotplug_deregister_callback(g_ctx.libusb_ctx,
+			g_ctx.disconn_handle);
+
+	g_ctx.thread_exit = 1;
+	pthread_join(g_ctx.thread, NULL);
+
+	libusb_exit(g_ctx.libusb_ctx);
+	g_ctx.libusb_ctx = NULL;
+}

devicemodel/include/usb_pmapper.h

@@ -118,6 +118,10 @@ struct usb_dev_sys_ctx_info {
 	pthread_t thread;
 	int thread_exit;
 
+	/* handles of callback */
+	libusb_hotplug_callback_handle conn_handle;
+	libusb_hotplug_callback_handle disconn_handle;
+
 	/*
 	 * The following callback funtions will be registered by
 	 * the code from HCD(eg: XHCI, EHCI...) emulation layer.
@@ -137,6 +141,7 @@ struct usb_dev_sys_ctx_info {
 int usb_dev_sys_init(usb_dev_sys_cb conn_cb, usb_dev_sys_cb disconn_cb,
 		usb_dev_sys_cb notify_cb, usb_dev_sys_cb intr_cb,
 		void *hci_data, int log_level);
+void usb_dev_sys_deinit(void);
 void *usb_dev_init(void *pdata, char *opt);
 void usb_dev_deinit(void *pdata);
 int usb_dev_info(void *pdata, int type, void *value, int size);