7  * Copyright (C) 2005 Mike Wray, Hewlett-Packard
35  * XenBus management of the NewBus bus containing the backend instances of
40 #include <sys/bus.h>
54 #include <xen/xen-os.h>
59 /*------------------ Private Device Attachment Functions  --------------------*/
61  * \brief Probe for the existence of the XenBus back bus.
63  * \param dev  NewBus device_t for this XenBus back bus instance.
76  * \brief Attach the XenBus back bus.
78  * \param dev  NewBus device_t for this XenBus back bus instance.
97 	mtx_lock(&xbs->xbs_lock);  in xenbusb_back_attach()
98 	if ((xbs->xbs_flags & XBS_ATTACH_CH_ACTIVE) != 0) {  in xenbusb_back_attach()
99 		xbs->xbs_flags &= ~XBS_ATTACH_CH_ACTIVE;  in xenbusb_back_attach()
100 		mtx_unlock(&xbs->xbs_lock);  in xenbusb_back_attach()
101 		config_intrhook_disestablish(&xbs->xbs_attach_ch);  in xenbusb_back_attach()
103 		mtx_unlock(&xbs->xbs_lock);  in xenbusb_back_attach()
110  * \brief Enumerate all devices of the given type on this bus.
112  * \param dev   NewBus device_t for this XenBus backend bus instance.
113  * \param type  String indicating the device sub-tree (e.g. "vfb", "vif")
126  *     backend/<device type>/<frontend vm id>/<device id>
139 	error = xs_directory(XST_NIL, xbs->xbs_node, type, &vm_count, &vms);  in xenbusb_back_enumerate_type()
152 		error = xs_directory(XST_NIL, xbs->xbs_node, sbuf_data(vm_path),  in xenbusb_back_enumerate_type()
160 			struct sbuf *id;  in xenbusb_back_enumerate_type()  local
163 			id = xs_join(vm, dev_num);  in xenbusb_back_enumerate_type()
164 			xenbusb_add_device(dev, type, sbuf_data(id));  in xenbusb_back_enumerate_type()
165 			sbuf_delete(id);  in xenbusb_back_enumerate_type()
179  * \param dev    NewBus device_t for this XenBus backend bus instance.
196 	if (ivars->xd_otherend_path != NULL) {  in xenbusb_back_get_otherend_node()
197 		free(ivars->xd_otherend_path, M_XENBUS);  in xenbusb_back_get_otherend_node()
198 		ivars->xd_otherend_path = NULL;  in xenbusb_back_get_otherend_node()
201 	error = xs_gather(XST_NIL, ivars->xd_node,  in xenbusb_back_get_otherend_node()
202 	    "frontend-id", "%i", &ivars->xd_otherend_id,  in xenbusb_back_get_otherend_node()
207 		ivars->xd_otherend_path = strdup(otherend_path, M_XENBUS);  in xenbusb_back_get_otherend_node()
208 		ivars->xd_otherend_path_len = strlen(otherend_path);  in xenbusb_back_get_otherend_node()
217  * \param bus       The XenBus bus parent of child.
222 xenbusb_back_otherend_changed(device_t bus, device_t child,  in xenbusb_back_otherend_changed()  argument
226 	xenbusb_otherend_changed(bus, child, peer_state);  in xenbusb_back_otherend_changed()
230 	 * newbus sense.  Only the front<->back connection is  in xenbusb_back_otherend_changed()
246  * \param bus    The XenBus bus parent of child.
248  * \param_path   The tree relative sub-path to the modified node.  The empty
252 xenbusb_back_localend_changed(device_t bus, device_t child, const char *path)  in xenbusb_back_localend_changed()  argument
255 	xenbusb_localend_changed(bus, child, path);  in xenbusb_back_localend_changed()
277 	 * is taken to mark a back-end closed, the control  in xenbusb_back_localend_changed()
280 	xs_rm(XST_NIL, xenbus_get_node(child), "hotplug-status");  in xenbusb_back_localend_changed()
283 /*-------------------- Private Device Attachment Data  -----------------------*/
294 	/* Bus Interface */ 
303 	/* XenBus Bus Interface */