Source to osfmk/device/iokit_rpc.c
/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <mach_kdb.h>
#include <zone_debug.h>
#include <mach_kdb.h>
#include <mach/boolean.h>
#include <mach/kern_return.h>
#include <mach/mig_errors.h>
#include <mach/port.h>
#include <mach/vm_param.h>
#include <mach/notify.h>
#include <mach/mach_host_server.h>
#include <mach/mach_types.h>
#include <machine/machparam.h> /* spl definitions */
#include <ipc/ipc_port.h>
#include <ipc/ipc_space.h>
#include <kern/clock.h>
#include <kern/spl.h>
#include <kern/ast.h>
#include <kern/counters.h>
#include <kern/queue.h>
#include <kern/zalloc.h>
#include <kern/thread.h>
#include <kern/thread_swap.h>
#include <kern/task.h>
#include <kern/sched_prim.h>
#include <kern/misc_protos.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <device/device_types.h>
#include <device/device_port.h>
#include <device/device_server.h>
#include <sys/ioctl.h>
#include <machine/machparam.h>
#ifdef __ppc__
#include <ppc/mappings.h>
#include <ppc/pmap_internals.h>
#endif
#include <IOKit/IOTypes.h>
#undef DEBUG
#define DEBUG
#define EXTERN
#define MIGEXTERN
/*
* Functions in iokit:IOUserClient.cpp
*/
extern void iokit_add_reference( io_object_t obj );
extern void iokit_remove_reference( io_object_t obj );
extern ipc_port_t iokit_port_for_object( io_object_t obj,
ipc_kobject_type_t type );
extern kern_return_t iokit_client_died( io_object_t obj,
ipc_port_t port, ipc_kobject_type_t type );
extern kern_return_t
iokit_client_memory_for_type(
io_object_t connect,
unsigned int type,
unsigned int * flags,
vm_address_t * address,
vm_size_t * size );
/*
* Lookup a device by its port.
* Doesn't consume the naked send right; produces a device reference.
*/
MIGEXTERN io_object_t
iokit_lookup_object_port(
ipc_port_t port)
{
register io_object_t obj;
if (!IP_VALID(port))
return (NULL);
ip_lock(port);
if (ip_active(port) && (ip_kotype(port) == IKOT_IOKIT_OBJECT)) {
obj = (io_object_t) port->ip_kobject;
iokit_add_reference( obj );
}
else
obj = NULL;
ip_unlock(port);
return( obj );
}
MIGEXTERN io_object_t
iokit_lookup_connect_port(
ipc_port_t port)
{
register io_object_t obj;
if (!IP_VALID(port))
return (NULL);
ip_lock(port);
if (ip_active(port) && (ip_kotype(port) == IKOT_IOKIT_CONNECT)) {
obj = (io_object_t) port->ip_kobject;
iokit_add_reference( obj );
}
else
obj = NULL;
ip_unlock(port);
return( obj );
}
/*
* Get the port for a device.
* Consumes a device reference; produces a naked send right.
*/
MIGEXTERN ipc_port_t
iokit_make_object_port(
io_object_t obj )
{
register ipc_port_t port;
if( obj == NULL)
return IP_NULL;
port = iokit_port_for_object( obj, IKOT_IOKIT_OBJECT );
if( port)
port = ipc_port_make_send( port);
iokit_remove_reference( obj );
return( port);
}
MIGEXTERN ipc_port_t
iokit_make_connect_port(
io_object_t obj )
{
register ipc_port_t port;
if( obj == NULL)
return IP_NULL;
port = iokit_port_for_object( obj, IKOT_IOKIT_CONNECT );
if( port)
port = ipc_port_make_send( port);
iokit_remove_reference( obj );
return( port);
}
EXTERN ipc_port_t
iokit_alloc_object_port( io_object_t obj, ipc_kobject_type_t type );
int gIOKitPortCount;
EXTERN ipc_port_t
iokit_alloc_object_port( io_object_t obj, ipc_kobject_type_t type )
{
ipc_port_t notify;
ipc_port_t port;
do {
/* Allocate port, keeping a reference for it. */
port = ipc_port_alloc_kernel();
if( port == IP_NULL)
continue;
/* set kobject & type */
// iokit_add_reference( obj );
ipc_kobject_set( port, (ipc_kobject_t) obj, type);
/* Request no-senders notifications on the port. */
notify = ipc_port_make_sonce( port);
ip_lock( port);
ipc_port_nsrequest( port, 1, notify, ¬ify);
assert( notify == IP_NULL);
gIOKitPortCount++;
} while( FALSE);
return( port );
}
EXTERN kern_return_t
iokit_destroy_object_port( ipc_port_t port )
{
ipc_kobject_set( port, IKO_NULL, IKOT_NONE);
// iokit_remove_reference( obj );
ipc_port_dealloc_kernel( port);
gIOKitPortCount--;
return( KERN_SUCCESS);
}
EXTERN mach_port_name_t
iokit_make_send_right( task_t task, io_object_t obj, ipc_kobject_type_t type )
{
kern_return_t kr;
ipc_port_t port;
mach_port_name_t name;
if( obj == NULL)
return MACH_PORT_NULL;
port = iokit_port_for_object( obj, type );
if( port)
port = ipc_port_make_send( port);
if( port == IP_NULL)
return MACH_PORT_NULL;
kr = ipc_object_copyout( task->itk_space, (ipc_object_t) port,
MACH_MSG_TYPE_PORT_SEND, TRUE, &name);
if( kr != KERN_SUCCESS)
name = MACH_PORT_NULL;
iokit_remove_reference( obj );
return( name );
}
EXTERN vm_map_t
iokit_task_map( task_t task )
{
return( task->map );
}
EXTERN pmap_t
iokit_map_pmap( vm_map_t map )
{
return( map->pmap );
}
/*
* Handle the No-More_Senders notification generated from a device port destroy.
* Since there are no longer any tasks which hold a send right to this device
* port a NMS notification has been generated.
*/
static void
iokit_no_senders( mach_no_senders_notification_t * notification )
{
ipc_port_t port;
io_object_t obj;
ipc_kobject_type_t type;
port = (ipc_port_t) notification->not_header.msgh_remote_port;
// convert a port to io_object_t.
if( IP_VALID(port)) {
ip_lock(port);
if( ip_active(port)) {
obj = (io_object_t) port->ip_kobject;
type = ip_kotype( port );
if( (IKOT_IOKIT_OBJECT == type)
|| (IKOT_IOKIT_CONNECT == type))
iokit_add_reference( obj );
else
obj = NULL;
}
ip_unlock(port);
if( obj ) {
(void) iokit_client_died( obj, port, type );
iokit_remove_reference( obj );
}
}
}
EXTERN
boolean_t
iokit_notify( mach_msg_header_t * msg )
{
switch (msg->msgh_id) {
case MACH_NOTIFY_NO_SENDERS:
iokit_no_senders((mach_no_senders_notification_t *) msg);
return TRUE;
case MACH_NOTIFY_PORT_DELETED:
case MACH_NOTIFY_PORT_DESTROYED:
case MACH_NOTIFY_SEND_ONCE:
case MACH_NOTIFY_DEAD_NAME:
default:
printf("iokit_notify: strange notification %ld\n", msg->msgh_id);
return FALSE;
}
}
static void IOMapPage(vm_map_t map, vm_offset_t va, vm_offset_t pa,
int mapFlags)
{
#ifdef __ppc__
struct phys_entry * pp;
spl_t spl;
int memattr;
#endif
vm_prot_t prot;
pmap_t pmap = map->pmap;
prot = (mapFlags & kIOMapReadOnly)
? VM_PROT_READ : (VM_PROT_READ|VM_PROT_WRITE);
#if __ppc__
/* Get the physent for this physical page */
pp = pmap_find_physentry(pa);
spl = splhigh();
/* Remove any other mapping at this address */
mapping_remove(pmap->space, va);
switch( mapFlags & kIOMapCacheMask ) {
case kIOMapDefaultCache:
default:
if( pp )
memattr = ((pp->pte1 & 0x00000078) >> 3);
else
memattr = PTE_WIMG_UNCACHED_COHERENT_GUARDED;
break;
case kIOMapInhibitCache:
memattr = PTE_WIMG_UNCACHED_COHERENT_GUARDED;
break;
case kIOMapWriteThruCache:
memattr = PTE_WIMG_WT_CACHED_COHERENT_GUARDED;
break;
case kIOMapCopybackCache:
// memattr = PTE_WIMG_CB_CACHED_COHERENT;
memattr = PTE_WIMG_CB_CACHED;
break;
}
/* Make the address mapping */
mapping_make(pmap, pmap->space, 0, va, pa, prot, memattr);
splx(spl);
#else
pmap_enter( pmap, va, pa, prot, TRUE);
#endif
}
kern_return_t IOMapPages(vm_map_t map, vm_offset_t va, vm_offset_t pa,
vm_size_t length, unsigned int options)
{
vm_size_t off;
#if __ppc__
/* TEMPORARY - make sure there are enough free mappings */
mapping_prealloc( length );
#endif
// enter each page's physical address in the target map
for ( off = 0; off < length; off += page_size ) {
IOMapPage( map, va + off, pa + off, options );
}
#ifdef __ppc__
/* TEMPORARY - make sure there are enough free mappings */
mapping_relpre();
#endif
return( KERN_SUCCESS );
}
void IOGetTime( mach_timespec_t * clock_time);
void IOGetTime( mach_timespec_t * clock_time)
{
*clock_time = clock_get_system_value();
}