xenbusb_front.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/systm.h>
#include <sys/sx.h>
#include <sys/taskqueue.h>
#include <machine/stdarg.h>
#include <xen/xen-os.h>
#include <xen/gnttab.h>
#include <xen/xenbus/xenbusvar.h>
#include <xen/xenbus/xenbusb.h>

Include dependency graph for xenbusb_front.c:

Go to the source code of this file.

Functions
	__FBSDID ("$FreeBSD$")
static int	xenbusb_front_probe (device_t dev)
	Probe for the existence of the XenBus front bus. More...
static int	xenbusb_front_attach (device_t dev)
	Attach the XenBus front bus. More...
static int	xenbusb_front_enumerate_type (device_t dev, const char *type)
	Enumerate all devices of the given type on this bus. More...
static int	xenbusb_front_get_otherend_node (device_t dev, struct xenbus_device_ivars *ivars)
	Determine and store the XenStore path for the other end of a split device whose local end is represented by ivars. More...
	DEFINE_CLASS_0 (xenbusb_front, xenbusb_front_driver, xenbusb_front_methods, sizeof(struct xenbusb_softc))
	DRIVER_MODULE (xenbusb_front, xenstore, xenbusb_front_driver, xenbusb_front_devclass, 0, 0)

Variables
static device_method_t	xenbusb_front_methods []
devclass_t	xenbusb_front_devclass

Detailed Description

XenBus management of the NewBus bus containing the frontend instances of Xen split devices.

Definition in file xenbusb_front.c.

Function Documentation

xenbusb_front_attach()

static int xenbusb_front_attach ( device_t  dev )

static

Attach the XenBus front bus.

Parameters

dev	NewBus device_t for this XenBus front bus instance.

Returns

On success, 0. Otherwise an errno value indicating the type of failure.

Definition at line 86 of file xenbusb_front.c.

References xenbusb_attach().

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xenbusb_front_enumerate_type()

static int xenbusb_front_enumerate_type ( device_t  dev, const char *  type  )

static

Enumerate all devices of the given type on this bus.

Parameters

dev	NewBus device_t for this XenBus front bus instance.
type	String indicating the device sub-tree (e.g. "vfb", "vif") to enumerate.

Returns

On success, 0. Otherwise an errno value indicating the type of failure.

Devices that are found are entered into the NewBus hierarchy via xenbusb_add_device(). xenbusb_add_device() ignores duplicate detects and ignores duplicate devices, so it can be called unconditionally for any device found in the XenStore.

Definition at line 107 of file xenbusb_front.c.

References xenbusb_softc::xbs_node, and xenbusb_add_device().

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xenbusb_front_get_otherend_node()

static int xenbusb_front_get_otherend_node ( device_t  dev, struct xenbus_device_ivars *  ivars  )

static

Determine and store the XenStore path for the other end of a split device whose local end is represented by ivars.

If successful, the xd_otherend_path field of the child's instance variables will be updated.

Parameters

dev	NewBus device_t for this XenBus front bus instance.
ivars	Instance variables from the XenBus child device for which to perform this function.

Returns

On success, 0. Otherwise an errno value indicating the type of failure.

Definition at line 141 of file xenbusb_front.c.

References xenbus_device_ivars::xd_node, xenbus_device_ivars::xd_otherend_id, xenbus_device_ivars::xd_otherend_path, and xenbus_device_ivars::xd_otherend_path_len.

xenbusb_front_probe()

static int xenbusb_front_probe ( device_t  dev )

static

Probe for the existence of the XenBus front bus.

Parameters

dev	NewBus device_t for this XenBus front bus instance.

Returns

Always returns 0 indicating success.

Definition at line 70 of file xenbusb_front.c.

Variable Documentation

xenbusb_front_devclass

devclass_t xenbusb_front_devclass

Definition at line 192 of file xenbusb_front.c.

xenbusb_front_methods

device_method_t xenbusb_front_methods[]

static

Initial value:

= { 
         
        DEVMETHOD(device_identify,      xenbusb_identify),
        DEVMETHOD(device_probe,         xenbusb_front_probe), 
        DEVMETHOD(device_attach,        xenbusb_front_attach), 
        DEVMETHOD(device_detach,        bus_generic_detach), 
        DEVMETHOD(device_shutdown,      bus_generic_shutdown), 
        DEVMETHOD(device_suspend,       bus_generic_suspend), 
        DEVMETHOD(device_resume,        xenbusb_resume), 
 
         
        DEVMETHOD(bus_print_child,      xenbusb_print_child),
        DEVMETHOD(bus_read_ivar,        xenbusb_read_ivar), 
        DEVMETHOD(bus_write_ivar,       xenbusb_write_ivar), 
        DEVMETHOD(bus_alloc_resource,   bus_generic_alloc_resource),
        DEVMETHOD(bus_release_resource, bus_generic_release_resource),
        DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
        DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
 
        
        DEVMETHOD(xenbusb_enumerate_type, xenbusb_front_enumerate_type),
        DEVMETHOD(xenbusb_get_otherend_node, xenbusb_front_get_otherend_node),
        { 0, 0 } 
}

Definition at line 165 of file xenbusb_front.c.