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--- xnu/xnu-124.13/iokit/Kernel/IOMemoryDescriptor.cpp
+++ xnu/xnu-517/iokit/Kernel/IOMemoryDescriptor.cpp
@@ -3,19 +3,22 @@
*
* @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.
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The 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.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
@@ -25,44 +28,161 @@
* HISTORY
*
*/
+// 45678901234567890123456789012345678901234567890123456789012345678901234567890
+#include <sys/cdefs.h>
#include <IOKit/assert.h>
#include <IOKit/system.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOMemoryDescriptor.h>
+#include <IOKit/IOMapper.h>
+#include <IOKit/IOKitKeysPrivate.h>
#include <IOKit/IOKitDebug.h>
#include <libkern/c++/OSContainers.h>
+#include <libkern/c++/OSDictionary.h>
+#include <libkern/c++/OSArray.h>
+#include <libkern/c++/OSSymbol.h>
+#include <libkern/c++/OSNumber.h>
#include <sys/cdefs.h>
__BEGIN_DECLS
#include <vm/pmap.h>
-void pmap_enter(pmap_t pmap, vm_offset_t va, vm_offset_t pa,
- vm_prot_t prot, boolean_t wired);
+#include <mach/memory_object_types.h>
+#include <device/device_port.h>
+
+#ifndef i386
+struct phys_entry *pmap_find_physentry(ppnum_t pa);
+#endif
+extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
void ipc_port_release_send(ipc_port_t port);
-vm_offset_t vm_map_get_phys_page(vm_map_t map, vm_offset_t offset);
+
+/* Copy between a physical page and a virtual address in the given vm_map */
+kern_return_t copypv(addr64_t source, addr64_t sink, unsigned int size, int which);
+
+memory_object_t
+device_pager_setup(
+ memory_object_t pager,
+ int device_handle,
+ vm_size_t size,
+ int flags);
+void
+device_pager_deallocate(
+ memory_object_t);
+kern_return_t
+device_pager_populate_object(
+ memory_object_t pager,
+ vm_object_offset_t offset,
+ ppnum_t phys_addr,
+ vm_size_t size);
+kern_return_t
+memory_object_iopl_request(
+ ipc_port_t port,
+ memory_object_offset_t offset,
+ vm_size_t *upl_size,
+ upl_t *upl_ptr,
+ upl_page_info_array_t user_page_list,
+ unsigned int *page_list_count,
+ int *flags);
+
+/*
+ * Page fault handling based on vm_map (or entries therein)
+ */
+extern kern_return_t vm_fault(
+ vm_map_t map,
+ vm_offset_t vaddr,
+ vm_prot_t fault_type,
+ boolean_t change_wiring,
+ int interruptible,
+ pmap_t caller_pmap,
+ vm_offset_t caller_pmap_addr);
+
+unsigned int IOTranslateCacheBits(struct phys_entry *pp);
+
+vm_map_t IOPageableMapForAddress( vm_address_t address );
+
+typedef kern_return_t (*IOIteratePageableMapsCallback)(vm_map_t map, void * ref);
+
+kern_return_t IOIteratePageableMaps(vm_size_t size,
+ IOIteratePageableMapsCallback callback, void * ref);
__END_DECLS
+#define kIOMaximumMappedIOByteCount (512*1024*1024)
+
+static IOMapper * gIOSystemMapper;
+static ppnum_t gIOMaximumMappedIOPageCount = atop_32(kIOMaximumMappedIOByteCount);
+
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-OSDefineMetaClass( IOMemoryDescriptor, OSObject )
-OSDefineAbstractStructors( IOMemoryDescriptor, OSObject )
+OSDefineMetaClassAndAbstractStructors( IOMemoryDescriptor, OSObject )
#define super IOMemoryDescriptor
OSDefineMetaClassAndStructors(IOGeneralMemoryDescriptor, IOMemoryDescriptor)
-extern "C" vm_map_t IOPageableMapForAddress( vm_address_t address );
-
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-inline vm_map_t IOGeneralMemoryDescriptor::getMapForTask( task_t task, vm_address_t address )
-{
- if( (task == kernel_task) && (kIOMemoryRequiresWire & _flags))
- return( IOPageableMapForAddress( address ) );
+static IORecursiveLock * gIOMemoryLock;
+
+#define LOCK IORecursiveLockLock( gIOMemoryLock)
+#define UNLOCK IORecursiveLockUnlock( gIOMemoryLock)
+#define SLEEP IORecursiveLockSleep( gIOMemoryLock, (void *)this, THREAD_UNINT)
+#define WAKEUP \
+ IORecursiveLockWakeup( gIOMemoryLock, (void *)this, /* one-thread */ false)
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#define next_page(a) ( trunc_page_32(a) + PAGE_SIZE )
+
+
+extern "C" {
+
+kern_return_t device_data_action(
+ int device_handle,
+ ipc_port_t device_pager,
+ vm_prot_t protection,
+ vm_object_offset_t offset,
+ vm_size_t size)
+{
+ struct ExpansionData {
+ void * devicePager;
+ unsigned int pagerContig:1;
+ unsigned int unused:31;
+ IOMemoryDescriptor * memory;
+ };
+ kern_return_t kr;
+ ExpansionData * ref = (ExpansionData *) device_handle;
+ IOMemoryDescriptor * memDesc;
+
+ LOCK;
+ memDesc = ref->memory;
+ if( memDesc)
+ kr = memDesc->handleFault( device_pager, 0, 0,
+ offset, size, kIOMapDefaultCache /*?*/);
else
- return( get_task_map( task ));
+ kr = KERN_ABORTED;
+ UNLOCK;
+
+ return( kr );
+}
+
+kern_return_t device_close(
+ int device_handle)
+{
+ struct ExpansionData {
+ void * devicePager;
+ unsigned int pagerContig:1;
+ unsigned int unused:31;
+ IOMemoryDescriptor * memory;
+ };
+ ExpansionData * ref = (ExpansionData *) device_handle;
+
+ IODelete( ref, ExpansionData, 1 );
+
+ return( kIOReturnSuccess );
+}
+
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -76,13 +196,23 @@
*/
IOMemoryDescriptor *
IOMemoryDescriptor::withAddress(void * address,
- IOByteCount withLength,
- IODirection withDirection)
+ IOByteCount length,
+ IODirection direction)
+{
+ return IOMemoryDescriptor::
+ withAddress((vm_address_t) address, length, direction, kernel_task);
+}
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withAddress(vm_address_t address,
+ IOByteCount length,
+ IODirection direction,
+ task_t task)
{
IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
if (that)
{
- if (that->initWithAddress(address, withLength, withDirection))
+ if (that->initWithAddress(address, length, direction, task))
return that;
that->release();
@@ -91,30 +221,37 @@
}
IOMemoryDescriptor *
-IOMemoryDescriptor::withAddress(vm_address_t address,
- IOByteCount withLength,
- IODirection withDirection,
- task_t withTask)
+IOMemoryDescriptor::withPhysicalAddress(
+ IOPhysicalAddress address,
+ IOByteCount length,
+ IODirection direction )
+{
+ IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
+ if (self
+ && !self->initWithPhysicalAddress(address, length, direction)) {
+ self->release();
+ return 0;
+ }
+
+ return self;
+}
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withRanges( IOVirtualRange * ranges,
+ UInt32 withCount,
+ IODirection direction,
+ task_t task,
+ bool asReference)
{
IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
if (that)
{
- if (that->initWithAddress(address, withLength, withDirection, withTask))
+ if (that->initWithRanges(ranges, withCount, direction, task, asReference))
return that;
that->release();
}
return 0;
-}
-
-IOMemoryDescriptor *
-IOMemoryDescriptor::withPhysicalAddress(
- IOPhysicalAddress address,
- IOByteCount withLength,
- IODirection withDirection )
-{
- return( IOMemoryDescriptor::withAddress( address, withLength,
- withDirection, (task_t) 0 ));
}
@@ -127,33 +264,48 @@
* Passing the ranges as a reference will avoid an extra allocation.
*/
IOMemoryDescriptor *
-IOMemoryDescriptor::withRanges( IOVirtualRange * ranges,
- UInt32 withCount,
- IODirection withDirection,
- task_t withTask,
- bool asReference = false)
+IOMemoryDescriptor::withOptions(void * buffers,
+ UInt32 count,
+ UInt32 offset,
+ task_t task,
+ IOOptionBits opts,
+ IOMapper * mapper)
+{
+ IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
+
+ if (self
+ && !self->initWithOptions(buffers, count, offset, task, opts, mapper))
+ {
+ self->release();
+ return 0;
+ }
+
+ return self;
+}
+
+// Can't leave abstract but this should never be used directly,
+bool IOMemoryDescriptor::initWithOptions(void * buffers,
+ UInt32 count,
+ UInt32 offset,
+ task_t task,
+ IOOptionBits options,
+ IOMapper * mapper)
+{
+ // @@@ gvdl: Should I panic?
+ panic("IOMD::initWithOptions called\n");
+ return 0;
+}
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withPhysicalRanges( IOPhysicalRange * ranges,
+ UInt32 withCount,
+ IODirection direction,
+ bool asReference)
{
IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
if (that)
{
- if (that->initWithRanges(ranges, withCount, withDirection, withTask, asReference))
- return that;
-
- that->release();
- }
- return 0;
-}
-
-IOMemoryDescriptor *
-IOMemoryDescriptor::withPhysicalRanges( IOPhysicalRange * ranges,
- UInt32 withCount,
- IODirection withDirection,
- bool asReference = false)
-{
- IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
- if (that)
- {
- if (that->initWithPhysicalRanges(ranges, withCount, withDirection, asReference))
+ if (that->initWithPhysicalRanges(ranges, withCount, direction, asReference))
return that;
that->release();
@@ -165,15 +317,15 @@
IOMemoryDescriptor::withSubRange(IOMemoryDescriptor * of,
IOByteCount offset,
IOByteCount length,
- IODirection withDirection)
-{
- IOSubMemoryDescriptor * that = new IOSubMemoryDescriptor;
-
- if (that && !that->initSubRange(of, offset, length, withDirection)) {
- that->release();
- that = 0;
- }
- return that;
+ IODirection direction)
+{
+ IOSubMemoryDescriptor *self = new IOSubMemoryDescriptor;
+
+ if (self && !self->initSubRange(of, offset, length, direction)) {
+ self->release();
+ self = 0;
+ }
+ return self;
}
/*
@@ -223,29 +375,123 @@
return initWithPhysicalRanges( &_singleRange.p, 1, withDirection, true);
}
+bool
+IOGeneralMemoryDescriptor::initWithPhysicalRanges(
+ IOPhysicalRange * ranges,
+ UInt32 count,
+ IODirection direction,
+ bool reference)
+{
+ IOOptionBits mdOpts = direction | kIOMemoryTypePhysical;
+
+ if (reference)
+ mdOpts |= kIOMemoryAsReference;
+
+ return initWithOptions(ranges, count, 0, 0, mdOpts, /* mapper */ 0);
+}
+
+bool
+IOGeneralMemoryDescriptor::initWithRanges(
+ IOVirtualRange * ranges,
+ UInt32 count,
+ IODirection direction,
+ task_t task,
+ bool reference)
+{
+ IOOptionBits mdOpts = direction;
+
+ if (reference)
+ mdOpts |= kIOMemoryAsReference;
+
+ if (task) {
+ mdOpts |= kIOMemoryTypeVirtual;
+ if (task == kernel_task)
+ mdOpts |= kIOMemoryAutoPrepare;
+ }
+ else
+ mdOpts |= kIOMemoryTypePhysical;
+
+ // @@@ gvdl: Need to remove this
+ // Auto-prepare if this is a kernel memory descriptor as very few
+ // clients bother to prepare() kernel memory.
+ // But it has been enforced so what are you going to do?
+
+ return initWithOptions(ranges, count, 0, task, mdOpts, /* mapper */ 0);
+}
+
/*
- * initWithRanges:
+ * initWithOptions:
*
- * Initialize an IOMemoryDescriptor. The buffer is made up of several
- * virtual address ranges, from a given task
+ * IOMemoryDescriptor. The buffer is made up of several virtual address ranges,
+ * from a given task or several physical ranges or finally an UPL from the ubc
+ * system.
*
* Passing the ranges as a reference will avoid an extra allocation.
*
- * An IOMemoryDescriptor can be re-used by calling initWithAddress or
- * initWithRanges again on an existing instance -- note this behavior
- * is not commonly supported in other I/O Kit classes, although it is
- * supported here.
+ * An IOMemoryDescriptor can be re-used by calling initWithOptions again on an
+ * existing instance -- note this behavior is not commonly supported in other
+ * I/O Kit classes, although it is supported here.
*/
+
+enum ioPLBlockFlags {
+ kIOPLOnDevice = 0x00000001,
+ kIOPLExternUPL = 0x00000002,
+};
+
+struct ioPLBlock {
+ upl_t fIOPL;
+ vm_address_t fIOMDOffset; // The offset of this iopl in descriptor
+ vm_offset_t fPageInfo; // Pointer to page list or index into it
+ ppnum_t fMappedBase; // Page number of first page in this iopl
+ unsigned int fPageOffset; // Offset within first page of iopl
+ unsigned int fFlags; // Flags
+};
+
+struct ioGMDData {
+ IOMapper *fMapper;
+ unsigned int fPageCnt;
+ upl_page_info_t fPageList[0]; // @@@ gvdl need to get rid of this
+ // should be able to use upl directly
+ ioPLBlock fBlocks[0];
+};
+
+#define getDataP(osd) ((ioGMDData *) (osd)->getBytesNoCopy())
+#define getIOPLList(d) ((ioPLBlock *) &(d->fPageList[d->fPageCnt]))
+#define getNumIOPL(d,len) \
+ ((len - ((char *) getIOPLList(d) - (char *) d)) / sizeof(ioPLBlock))
+#define getPageList(d) (&(d->fPageList[0]))
+#define computeDataSize(p, u) \
+ (sizeof(ioGMDData) + p * sizeof(upl_page_info_t) + u * sizeof(ioPLBlock))
+
bool
-IOGeneralMemoryDescriptor::initWithRanges(
- IOVirtualRange * ranges,
- UInt32 withCount,
- IODirection withDirection,
- task_t withTask,
- bool asReference = false)
-{
- assert(ranges);
- assert(withCount);
+IOGeneralMemoryDescriptor::initWithOptions(void * buffers,
+ UInt32 count,
+ UInt32 offset,
+ task_t task,
+ IOOptionBits options,
+ IOMapper * mapper)
+{
+
+ switch (options & kIOMemoryTypeMask) {
+ case kIOMemoryTypeVirtual:
+ assert(task);
+ if (!task)
+ return false;
+ else
+ break;
+
+ case kIOMemoryTypePhysical: // Neither Physical nor UPL should have a task
+ mapper = kIOMapperNone;
+ case kIOMemoryTypeUPL:
+ assert(!task);
+ break;
+ default:
+panic("IOGMD::iWO(): bad type"); // @@@ gvdl: for testing
+ return false; /* bad argument */
+ }
+
+ assert(buffers);
+ assert(count);
/*
* We can check the _initialized instance variable before having ever set
@@ -253,19 +499,11 @@
* variables are zeroed on an object's allocation.
*/
- if (_initialized == false)
- {
- if (super::init() == false) return false;
- _initialized = true;
- }
- else
- {
+ if (_initialized) {
/*
* An existing memory descriptor is being retargeted to point to
* somewhere else. Clean up our present state.
*/
-
- assert(_wireCount == 0);
while (_wireCount)
complete();
@@ -274,54 +512,173 @@
if (_ranges.v && _rangesIsAllocated)
IODelete(_ranges.v, IOVirtualRange, _rangesCount);
}
-
- /*
- * Initialize the memory descriptor.
- */
-
- _ranges.v = 0;
- _rangesCount = withCount;
- _rangesIsAllocated = asReference ? false : true;
- _direction = withDirection;
- _length = 0;
- _task = withTask;
+ else {
+ if (!super::init())
+ return false;
+ _initialized = true;
+ }
+
+ // Grab the appropriate mapper
+ if (mapper == kIOMapperNone)
+ mapper = 0; // No Mapper
+ else if (!mapper) {
+ IOMapper::checkForSystemMapper();
+ gIOSystemMapper = mapper = IOMapper::gSystem;
+ }
+
+ _flags = options;
+ _task = task;
+
+ // DEPRECATED variable initialisation
+ _direction = (IODirection) (_flags & kIOMemoryDirectionMask);
_position = 0;
- _positionAtIndex = 0;
- _positionAtOffset = 0;
_kernPtrAligned = 0;
_cachedPhysicalAddress = 0;
_cachedVirtualAddress = 0;
- _flags = 0;
-
- if (withTask && (withTask != kernel_task))
- _flags |= kIOMemoryRequiresWire;
-
- if (asReference)
- _ranges.v = ranges;
- else
- {
- _ranges.v = IONew(IOVirtualRange, withCount);
- if (_ranges.v == 0) return false;
- bcopy(/* from */ ranges, _ranges.v, withCount * sizeof(IOVirtualRange));
- }
-
- for (unsigned index = 0; index < _rangesCount; index++)
- {
- _length += _ranges.v[index].length;
+
+ if ( (options & kIOMemoryTypeMask) == kIOMemoryTypeUPL) {
+
+ ioGMDData *dataP;
+ unsigned int dataSize = computeDataSize(/* pages */ 0, /* upls */ 1);
+
+ if (!_memoryEntries) {
+ _memoryEntries = OSData::withCapacity(dataSize);
+ if (!_memoryEntries)
+ return false;
+ }
+ else if (!_memoryEntries->initWithCapacity(dataSize))
+ return false;
+
+ _memoryEntries->appendBytes(0, sizeof(ioGMDData));
+ dataP = getDataP(_memoryEntries);
+ dataP->fMapper = mapper;
+ dataP->fPageCnt = 0;
+
+ _wireCount++; // UPLs start out life wired
+
+ _length = count;
+ _pages += atop_32(offset + count + PAGE_MASK) - atop_32(offset);
+
+ ioPLBlock iopl;
+ upl_page_info_t *pageList = UPL_GET_INTERNAL_PAGE_LIST((upl_t) buffers);
+
+ iopl.fIOPL = (upl_t) buffers;
+ // Set the flag kIOPLOnDevice convieniently equal to 1
+ iopl.fFlags = pageList->device | kIOPLExternUPL;
+ iopl.fIOMDOffset = 0;
+ if (!pageList->device) {
+ // @@@ gvdl: Ask JoeS are the pages contiguious with the list?
+ // or there a chance that we may be inserting 0 phys_addrs?
+ // Pre-compute the offset into the UPL's page list
+ pageList = &pageList[atop_32(offset)];
+ offset &= PAGE_MASK;
+ if (mapper) {
+ iopl.fMappedBase = mapper->iovmAlloc(_pages);
+ mapper->iovmInsert(iopl.fMappedBase, 0, pageList, _pages);
+ }
+ else
+ iopl.fMappedBase = 0;
+ }
+ else
+ iopl.fMappedBase = 0;
+ iopl.fPageInfo = (vm_address_t) pageList;
+ iopl.fPageOffset = offset;
+
+ _memoryEntries->appendBytes(&iopl, sizeof(iopl));
+ }
+ else { /* kIOMemoryTypeVirtual | kIOMemoryTypePhysical */
+ IOVirtualRange *ranges = (IOVirtualRange *) buffers;
+
+ /*
+ * Initialize the memory descriptor.
+ */
+
+ _length = 0;
+ _pages = 0;
+ for (unsigned ind = 0; ind < count; ind++) {
+ IOVirtualRange cur = ranges[ind];
+
+ _length += cur.length;
+ _pages += atop_32(cur.address + cur.length + PAGE_MASK)
+ - atop_32(cur.address);
+ }
+
+ _ranges.v = 0;
+ _rangesIsAllocated = !(options & kIOMemoryAsReference);
+ _rangesCount = count;
+
+ if (options & kIOMemoryAsReference)
+ _ranges.v = ranges;
+ else {
+ _ranges.v = IONew(IOVirtualRange, count);
+ if (!_ranges.v)
+ return false;
+ bcopy(/* from */ ranges, _ranges.v,
+ count * sizeof(IOVirtualRange));
+ }
+
+ // Auto-prepare memory at creation time.
+ // Implied completion when descriptor is free-ed
+ if ( (options & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
+ _wireCount++; // Physical MDs are start out wired
+ else { /* kIOMemoryTypeVirtual */
+ ioGMDData *dataP;
+ unsigned int dataSize =
+ computeDataSize(_pages, /* upls */ _rangesCount * 2);
+
+ if (!_memoryEntries) {
+ _memoryEntries = OSData::withCapacity(dataSize);
+ if (!_memoryEntries)
+ return false;
+ }
+ else if (!_memoryEntries->initWithCapacity(dataSize))
+ return false;
+
+ _memoryEntries->appendBytes(0, sizeof(ioGMDData));
+ dataP = getDataP(_memoryEntries);
+ dataP->fMapper = mapper;
+ dataP->fPageCnt = _pages;
+
+ if (kIOMemoryPersistent & _flags)
+ {
+ kern_return_t error;
+ ipc_port_t sharedMem;
+
+ vm_size_t size = _pages << PAGE_SHIFT;
+ vm_address_t startPage;
+
+ startPage = trunc_page_32(_ranges.v[0].address);
+
+ vm_map_t theMap = ((_task == kernel_task) && (kIOMemoryBufferPageable & _flags))
+ ? IOPageableMapForAddress(startPage)
+ : get_task_map(_task);
+
+ vm_size_t actualSize = size;
+ error = mach_make_memory_entry( theMap,
+ &actualSize, startPage,
+ VM_PROT_READ | VM_PROT_WRITE, &sharedMem,
+ NULL );
+
+ if (KERN_SUCCESS == error) {
+ if (actualSize == round_page_32(size)) {
+ _memEntry = (void *) sharedMem;
+ } else {
+#if IOASSERT
+ IOLog("mach_make_memory_entry_64 (%08x) size (%08lx:%08x)\n",
+ startPage, (UInt32)actualSize, size);
+#endif
+ ipc_port_release_send( sharedMem );
+ }
+ }
+ }
+
+ if ((_flags & kIOMemoryAutoPrepare)
+ && prepare() != kIOReturnSuccess)
+ return false;
+ }
}
return true;
-}
-
-bool
-IOGeneralMemoryDescriptor::initWithPhysicalRanges( IOPhysicalRange * ranges,
- UInt32 withCount,
- IODirection withDirection,
- bool asReference = false)
-{
-#warning assuming virtual, physical addresses same size
- return( initWithRanges( (IOVirtualRange *) ranges,
- withCount, withDirection, (task_t) 0, asReference ));
}
/*
@@ -331,97 +688,41 @@
*/
void IOGeneralMemoryDescriptor::free()
{
+ LOCK;
+ if( reserved)
+ reserved->memory = 0;
+ UNLOCK;
+
while (_wireCount)
complete();
+ if (_memoryEntries)
+ _memoryEntries->release();
+
if (_kernPtrAligned)
unmapFromKernel();
if (_ranges.v && _rangesIsAllocated)
IODelete(_ranges.v, IOVirtualRange, _rangesCount);
- if( _memEntry)
+
+ if (reserved && reserved->devicePager)
+ device_pager_deallocate( (memory_object_t) reserved->devicePager );
+
+ // memEntry holds a ref on the device pager which owns reserved
+ // (ExpansionData) so no reserved access after this point
+ if (_memEntry)
ipc_port_release_send( (ipc_port_t) _memEntry );
+
super::free();
}
-void IOGeneralMemoryDescriptor::unmapFromKernel()
-{
- kern_return_t krtn;
- vm_offset_t off;
- // Pull the shared pages out of the task map
- // Do we need to unwire it first?
- for ( off = 0; off < _kernSize; off += page_size )
- {
- pmap_change_wiring(
- kernel_pmap,
- _kernPtrAligned + off,
- FALSE);
-
- pmap_remove(
- kernel_pmap,
- _kernPtrAligned + off,
- _kernPtrAligned + off + page_size);
- }
- // Free the former shmem area in the task
- krtn = vm_deallocate(kernel_map,
- _kernPtrAligned,
- _kernSize );
- assert(krtn == KERN_SUCCESS);
- _kernPtrAligned = 0;
-}
-
-void IOGeneralMemoryDescriptor::mapIntoKernel(unsigned rangeIndex)
-{
- kern_return_t krtn;
- vm_offset_t off;
-
- if (_kernPtrAligned)
- {
- if (_kernPtrAtIndex == rangeIndex) return;
- unmapFromKernel();
- assert(_kernPtrAligned == 0);
- }
-
- vm_offset_t srcAlign = trunc_page(_ranges.v[rangeIndex].address);
-
- _kernSize = trunc_page(_ranges.v[rangeIndex].address +
- _ranges.v[rangeIndex].length +
- page_size - 1) - srcAlign;
-
- /* Find some memory of the same size in kernel task. We use vm_allocate()
- to do this. vm_allocate inserts the found memory object in the
- target task's map as a side effect. */
- krtn = vm_allocate( kernel_map,
- &_kernPtrAligned,
- _kernSize,
- VM_FLAGS_ANYWHERE|VM_MAKE_TAG(VM_MEMORY_IOKIT) ); // Find first fit
- assert(krtn == KERN_SUCCESS);
- if(krtn) return;
-
- /* For each page in the area allocated from the kernel map,
- find the physical address of the page.
- Enter the page in the target task's pmap, at the
- appropriate target task virtual address. */
- for ( off = 0; off < _kernSize; off += page_size )
- {
- vm_offset_t kern_phys_addr, phys_addr;
- if( _task)
- phys_addr = pmap_extract( get_task_pmap(_task), srcAlign + off );
- else
- phys_addr = srcAlign + off;
- assert(phys_addr);
- if(phys_addr == 0) return;
-
- // Check original state.
- kern_phys_addr = pmap_extract( kernel_pmap, _kernPtrAligned + off );
- // Set virtual page to point to the right physical one
- pmap_enter(
- kernel_pmap,
- _kernPtrAligned + off,
- phys_addr,
- VM_PROT_READ|VM_PROT_WRITE,
- TRUE);
- }
- _kernPtrAtIndex = rangeIndex;
-}
+/* DEPRECATED */ void IOGeneralMemoryDescriptor::unmapFromKernel()
+/* DEPRECATED */ {
+ panic("IOGMD::unmapFromKernel deprecated");
+/* DEPRECATED */ }
+/* DEPRECATED */
+/* DEPRECATED */ void IOGeneralMemoryDescriptor::mapIntoKernel(unsigned rangeIndex)
+/* DEPRECATED */ {
+ panic("IOGMD::mapIntoKernel deprecated");
+/* DEPRECATED */ }
/*
* getDirection:
@@ -443,8 +744,7 @@
return _length;
}
-void IOMemoryDescriptor::setTag(
- IOOptionBits tag )
+void IOMemoryDescriptor::setTag( IOOptionBits tag )
{
_tag = tag;
}
@@ -454,317 +754,568 @@
return( _tag);
}
-/*
- * setPosition
- *
- * Set the logical start position inside the client buffer.
- *
- * It is convention that the position reflect the actual byte count that
- * is successfully transferred into or out of the buffer, before the I/O
- * request is "completed" (ie. sent back to its originator).
- */
-
-void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
-{
- assert(position <= _length);
-
- if (position >= _length)
+// @@@ gvdl: who is using this API? Seems like a wierd thing to implement.
+IOPhysicalAddress IOMemoryDescriptor::getSourceSegment( IOByteCount offset,
+ IOByteCount * length )
+{
+ IOPhysicalAddress physAddr = 0;
+
+ if( prepare() == kIOReturnSuccess) {
+ physAddr = getPhysicalSegment( offset, length );
+ complete();
+ }
+
+ return( physAddr );
+}
+
+IOByteCount IOMemoryDescriptor::readBytes
+ (IOByteCount offset, void *bytes, IOByteCount length)
+{
+ addr64_t dstAddr = (addr64_t) (UInt32) bytes;
+ IOByteCount remaining;
+
+ // Assert that this entire I/O is withing the available range
+ assert(offset < _length);
+ assert(offset + length <= _length);
+ if (offset >= _length) {
+IOLog("IOGMD(%p): rB = o%lx, l%lx\n", this, offset, length); // @@@ gvdl
+ return 0;
+ }
+
+ remaining = length = min(length, _length - offset);
+ while (remaining) { // (process another target segment?)
+ addr64_t srcAddr64;
+ IOByteCount srcLen;
+
+ srcAddr64 = getPhysicalSegment64(offset, &srcLen);
+ if (!srcAddr64)
+ break;
+
+ // Clip segment length to remaining
+ if (srcLen > remaining)
+ srcLen = remaining;
+
+ copypv(srcAddr64, dstAddr, srcLen,
+ cppvPsrc | cppvNoRefSrc | cppvFsnk | cppvKmap);
+
+ dstAddr += srcLen;
+ offset += srcLen;
+ remaining -= srcLen;
+ }
+
+ assert(!remaining);
+
+ return length - remaining;
+}
+
+IOByteCount IOMemoryDescriptor::writeBytes
+ (IOByteCount offset, const void *bytes, IOByteCount length)
+{
+ addr64_t srcAddr = (addr64_t) (UInt32) bytes;
+ IOByteCount remaining;
+
+ // Assert that this entire I/O is withing the available range
+ assert(offset < _length);
+ assert(offset + length <= _length);
+
+ assert( !(kIOMemoryPreparedReadOnly & _flags) );
+
+ if ( (kIOMemoryPreparedReadOnly & _flags) || offset >= _length) {
+IOLog("IOGMD(%p): wB = o%lx, l%lx\n", this, offset, length); // @@@ gvdl
+ return 0;
+ }
+
+ remaining = length = min(length, _length - offset);
+ while (remaining) { // (process another target segment?)
+ addr64_t dstAddr64;
+ IOByteCount dstLen;
+
+ dstAddr64 = getPhysicalSegment64(offset, &dstLen);
+ if (!dstAddr64)
+ break;
+
+ // Clip segment length to remaining
+ if (dstLen > remaining)
+ dstLen = remaining;
+
+ copypv(srcAddr, (addr64_t) dstAddr64, dstLen,
+ cppvPsnk | cppvFsnk | cppvNoRefSrc | cppvNoModSnk | cppvKmap);
+
+ srcAddr += dstLen;
+ offset += dstLen;
+ remaining -= dstLen;
+ }
+
+ assert(!remaining);
+
+ return length - remaining;
+}
+
+// osfmk/device/iokit_rpc.c
+extern "C" unsigned int IODefaultCacheBits(addr64_t pa);
+
+/* DEPRECATED */ void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
+/* DEPRECATED */ {
+ panic("IOGMD::setPosition deprecated");
+/* DEPRECATED */ }
+
+IOPhysicalAddress IOGeneralMemoryDescriptor::getPhysicalSegment
+ (IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ IOPhysicalAddress address = 0;
+ IOPhysicalLength length = 0;
+
+// assert(offset <= _length);
+ if (offset < _length) // (within bounds?)
{
- _position = _length;
- _positionAtIndex = _rangesCount; /* careful: out-of-bounds */
- _positionAtOffset = 0;
- return;
- }
-
- if (position < _position)
+ if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical) {
+ unsigned int ind;
+
+ // Physical address based memory descriptor
+
+ // Find offset within descriptor and make it relative
+ // to the current _range.
+ for (ind = 0 ; offset >= _ranges.p[ind].length; ind++ )
+ offset -= _ranges.p[ind].length;
+
+ IOPhysicalRange cur = _ranges.p[ind];
+ address = cur.address + offset;
+ length = cur.length - offset;
+
+ // see how far we can coalesce ranges
+ for (++ind; ind < _rangesCount; ind++) {
+ cur = _ranges.p[ind];
+
+ if (address + length != cur.address)
+ break;
+
+ length += cur.length;
+ }
+
+ // @@@ gvdl: should assert(address);
+ // but can't as NVidia GeForce creates a bogus physical mem
+ {
+ assert(address || /*nvidia*/(!_ranges.p[0].address && 1 == _rangesCount));
+ }
+ assert(length);
+ }
+ else do {
+ // We need wiring & we are wired.
+ assert(_wireCount);
+
+ if (!_wireCount)
+ {
+ panic("IOGMD: not wired for getPhysicalSegment()");
+ continue;
+ }
+
+ assert(_memoryEntries);
+
+ ioGMDData * dataP = getDataP(_memoryEntries);
+ const ioPLBlock *ioplList = getIOPLList(dataP);
+ UInt ind, numIOPLs = getNumIOPL(dataP, _memoryEntries->getLength());
+ upl_page_info_t *pageList = getPageList(dataP);
+
+ assert(numIOPLs > 0);
+
+ // Scan through iopl info blocks looking for block containing offset
+ for (ind = 1; ind < numIOPLs; ind++) {
+ if (offset < ioplList[ind].fIOMDOffset)
+ break;
+ }
+
+ // Go back to actual range as search goes past it
+ ioPLBlock ioplInfo = ioplList[ind - 1];
+
+ if (ind < numIOPLs)
+ length = ioplList[ind].fIOMDOffset;
+ else
+ length = _length;
+ length -= offset; // Remainder within iopl
+
+ // Subtract offset till this iopl in total list
+ offset -= ioplInfo.fIOMDOffset;
+
+ // This is a mapped IOPL so we just need to compute an offset
+ // relative to the mapped base.
+ if (ioplInfo.fMappedBase) {
+ offset += (ioplInfo.fPageOffset & PAGE_MASK);
+ address = ptoa_32(ioplInfo.fMappedBase) + offset;
+ continue;
+ }
+
+ // Currently the offset is rebased into the current iopl.
+ // Now add the iopl 1st page offset.
+ offset += ioplInfo.fPageOffset;
+
+ // For external UPLs the fPageInfo field points directly to
+ // the upl's upl_page_info_t array.
+ if (ioplInfo.fFlags & kIOPLExternUPL)
+ pageList = (upl_page_info_t *) ioplInfo.fPageInfo;
+ else
+ pageList = &pageList[ioplInfo.fPageInfo];
+
+ // Check for direct device non-paged memory
+ if ( ioplInfo.fFlags & kIOPLOnDevice ) {
+ address = ptoa_32(pageList->phys_addr) + offset;
+ continue;
+ }
+
+ // Now we need compute the index into the pageList
+ ind = atop_32(offset);
+ offset &= PAGE_MASK;
+
+ IOPhysicalAddress pageAddr = pageList[ind].phys_addr;
+ address = ptoa_32(pageAddr) + offset;
+
+ // Check for the remaining data in this upl being longer than the
+ // remainder on the current page. This should be checked for
+ // contiguous pages
+ if (length > PAGE_SIZE - offset) {
+ // See if the next page is contiguous. Stop looking when we hit
+ // the end of this upl, which is indicated by the
+ // contigLength >= length.
+ IOByteCount contigLength = PAGE_SIZE - offset;
+
+ // Look for contiguous segment
+ while (contigLength < length
+ && ++pageAddr == pageList[++ind].phys_addr) {
+ contigLength += PAGE_SIZE;
+ }
+ if (length > contigLength)
+ length = contigLength;
+ }
+
+ assert(address);
+ assert(length);
+
+ } while (0);
+
+ if (!address)
+ length = 0;
+ }
+
+ if (lengthOfSegment)
+ *lengthOfSegment = length;
+
+ return address;
+}
+
+addr64_t IOMemoryDescriptor::getPhysicalSegment64
+ (IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ IOPhysicalAddress phys32;
+ IOByteCount length;
+ addr64_t phys64;
+
+ phys32 = getPhysicalSegment(offset, lengthOfSegment);
+ if (!phys32)
+ return 0;
+
+ if (gIOSystemMapper)
{
- _positionAtOffset = position;
- _positionAtIndex = 0;
+ IOByteCount origLen;
+
+ phys64 = gIOSystemMapper->mapAddr(phys32);
+ origLen = *lengthOfSegment;
+ length = page_size - (phys64 & (page_size - 1));
+ while ((length < origLen)
+ && ((phys64 + length) == gIOSystemMapper->mapAddr(phys32 + length)))
+ length += page_size;
+ if (length > origLen)
+ length = origLen;
+
+ *lengthOfSegment = length;
}
else
+ phys64 = (addr64_t) phys32;
+
+ return phys64;
+}
+
+IOPhysicalAddress IOGeneralMemoryDescriptor::getSourceSegment
+ (IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ IOPhysicalAddress address = 0;
+ IOPhysicalLength length = 0;
+
+ assert(offset <= _length);
+
+ if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypeUPL)
+ return super::getSourceSegment( offset, lengthOfSegment );
+
+ if ( offset < _length ) // (within bounds?)
{
- _positionAtOffset += (position - _position);
- }
- _position = position;
-
- while (_positionAtOffset >= _ranges.v[_positionAtIndex].length)
+ unsigned rangesIndex = 0;
+
+ for ( ; offset >= _ranges.v[rangesIndex].length; rangesIndex++ )
+ {
+ offset -= _ranges.v[rangesIndex].length; // (make offset relative)
+ }
+
+ address = _ranges.v[rangesIndex].address + offset;
+ length = _ranges.v[rangesIndex].length - offset;
+
+ for ( ++rangesIndex; rangesIndex < _rangesCount; rangesIndex++ )
+ {
+ if ( address + length != _ranges.v[rangesIndex].address ) break;
+
+ length += _ranges.v[rangesIndex].length; // (coalesce ranges)
+ }
+
+ assert(address);
+ if ( address == 0 ) length = 0;
+ }
+
+ if ( lengthOfSegment ) *lengthOfSegment = length;
+
+ return address;
+}
+
+/* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
+/* DEPRECATED */ void * IOGeneralMemoryDescriptor::getVirtualSegment(IOByteCount offset,
+/* DEPRECATED */ IOByteCount * lengthOfSegment)
+/* DEPRECATED */ {
+ if (_task == kernel_task)
+ return (void *) getSourceSegment(offset, lengthOfSegment);
+ else
+ panic("IOGMD::getVirtualSegment deprecated");
+
+ return 0;
+/* DEPRECATED */ }
+/* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
+
+#ifdef __ppc__
+extern vm_offset_t static_memory_end;
+#define io_kernel_static_end static_memory_end
+#else
+extern vm_offset_t first_avail;
+#define io_kernel_static_end first_avail
+#endif
+
+static kern_return_t
+io_get_kernel_static_upl(
+ vm_map_t map,
+ vm_address_t offset,
+ vm_size_t *upl_size,
+ upl_t *upl,
+ upl_page_info_array_t page_list,
+ unsigned int *count,
+ int *flags,
+ int force_data_sync)
+{
+ unsigned int pageCount, page;
+ ppnum_t phys;
+
+ pageCount = atop_32(*upl_size);
+ if (pageCount > *count)
+ pageCount = *count;
+
+ *upl = NULL;
+
+ for (page = 0; page < pageCount; page++)
{
- _positionAtOffset -= _ranges.v[_positionAtIndex].length;
- _positionAtIndex++;
- }
-}
-
-/*
- * readBytes:
- *
- * Copy data from the memory descriptor's buffer into the specified buffer,
- * relative to the current position. The memory descriptor's position is
- * advanced based on the number of bytes copied.
- */
-
-IOByteCount IOGeneralMemoryDescriptor::readBytes(IOByteCount offset,
- void * bytes, IOByteCount withLength)
-{
- IOByteCount bytesLeft;
- void * segment;
- IOByteCount segmentLength;
-
- if( offset != _position)
- setPosition( offset );
-
- withLength = min(withLength, _length - _position);
- bytesLeft = withLength;
-
-#if 0
- while (bytesLeft && (_position < _length))
+ phys = pmap_find_phys(kernel_pmap, ((addr64_t)offset) + ptoa_64(page));
+ if (!phys)
+ break;
+ page_list[page].phys_addr = phys;
+ page_list[page].pageout = 0;
+ page_list[page].absent = 0;
+ page_list[page].dirty = 0;
+ page_list[page].precious = 0;
+ page_list[page].device = 0;
+ }
+
+ return ((page >= pageCount) ? kIOReturnSuccess : kIOReturnVMError);
+}
+
+IOReturn IOGeneralMemoryDescriptor::wireVirtual(IODirection forDirection)
+{
+ IOReturn error = kIOReturnNoMemory;
+ ioGMDData *dataP;
+ ppnum_t mapBase = 0;
+ IOMapper *mapper;
+ ipc_port_t sharedMem = (ipc_port_t) _memEntry;
+
+ assert(!_wireCount);
+
+ if (_pages >= gIOMaximumMappedIOPageCount)
+ return kIOReturnNoResources;
+
+ dataP = getDataP(_memoryEntries);
+ mapper = dataP->fMapper;
+ if (mapper && _pages)
+ mapBase = mapper->iovmAlloc(_pages);
+
+ // Note that appendBytes(NULL) zeros the data up to the
+ // desired length.
+ _memoryEntries->appendBytes(0, dataP->fPageCnt * sizeof(upl_page_info_t));
+ dataP = 0; // May no longer be valid so lets not get tempted.
+
+ if (forDirection == kIODirectionNone)
+ forDirection = _direction;
+
+ int uplFlags; // This Mem Desc's default flags for upl creation
+ switch (forDirection)
{
- /* Compute the relative length to the end of this virtual segment. */
- segmentLength = min(_ranges.v[_positionAtIndex].length - _positionAtOffset, bytesLeft);
-
- /* Compute the relative address of this virtual segment. */
- segment = (void *)(_ranges.v[_positionAtIndex].address + _positionAtOffset);
-
- if (KERN_SUCCESS != vm_map_read_user(getMapForTask(_task, segment),
- /* from */ (vm_offset_t) segment, /* to */ (vm_offset_t) bytes,
- /* size */ segmentLength))
+ case kIODirectionOut:
+ // Pages do not need to be marked as dirty on commit
+ uplFlags = UPL_COPYOUT_FROM;
+ _flags |= kIOMemoryPreparedReadOnly;
+ break;
+
+ case kIODirectionIn:
+ default:
+ uplFlags = 0; // i.e. ~UPL_COPYOUT_FROM
+ break;
+ }
+ uplFlags |= UPL_SET_IO_WIRE | UPL_SET_LITE;
+
+ //
+ // Check user read/write access to the data buffer.
+ //
+ unsigned int pageIndex = 0;
+ IOByteCount mdOffset = 0;
+ vm_map_t curMap;
+ if (_task == kernel_task && (kIOMemoryBufferPageable & _flags))
+ curMap = 0;
+ else
+ { curMap = get_task_map(_task); }
+
+ for (UInt range = 0; range < _rangesCount; range++) {
+ ioPLBlock iopl;
+ IOVirtualRange curRange = _ranges.v[range];
+ vm_address_t startPage;
+ IOByteCount numBytes;
+
+ startPage = trunc_page_32(curRange.address);
+ iopl.fPageOffset = (short) curRange.address & PAGE_MASK;
+ if (mapper)
+ iopl.fMappedBase = mapBase + pageIndex;
+ else
+ iopl.fMappedBase = 0;
+ numBytes = iopl.fPageOffset + curRange.length;
+
+ while (numBytes) {
+ dataP = getDataP(_memoryEntries);
+ vm_map_t theMap =
+ (curMap)? curMap
+ : IOPageableMapForAddress(startPage);
+ upl_page_info_array_t pageInfo = getPageList(dataP);
+ int ioplFlags = uplFlags;
+ upl_page_list_ptr_t baseInfo = &pageInfo[pageIndex];
+
+ vm_size_t ioplSize = round_page_32(numBytes);
+ unsigned int numPageInfo = atop_32(ioplSize);
+
+ if ((theMap == kernel_map) && (startPage < io_kernel_static_end))
+ {
+ error = io_get_kernel_static_upl(theMap,
+ startPage,
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &ioplFlags,
+ false);
+
+ } else if (sharedMem && (kIOMemoryPersistent & _flags)) {
+
+ error = memory_object_iopl_request(sharedMem,
+ ptoa_32(pageIndex),
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &ioplFlags);
+
+ } else {
+ error = vm_map_get_upl(theMap,
+ startPage,
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &ioplFlags,
+ false);
+ }
+
+ assert(ioplSize);
+ if (error != KERN_SUCCESS)
+ goto abortExit;
+
+ error = kIOReturnNoMemory;
+
+ if (baseInfo->device) {
+ numPageInfo = 1;
+ iopl.fFlags = kIOPLOnDevice;
+ // Don't translate device memory at all
+ if (mapper && mapBase) {
+ mapper->iovmFree(mapBase, _pages);
+ mapBase = 0;
+ iopl.fMappedBase = 0;
+ }
+ }
+ else {
+ iopl.fFlags = 0;
+ if (mapper)
+ mapper->iovmInsert(mapBase, pageIndex,
+ baseInfo, numPageInfo);
+ }
+
+ iopl.fIOMDOffset = mdOffset;
+ iopl.fPageInfo = pageIndex;
+
+ if ((_flags & kIOMemoryAutoPrepare) && iopl.fIOPL)
+ {
+ kernel_upl_commit(iopl.fIOPL, 0, 0);
+ iopl.fIOPL = 0;
+ }
+
+ if (!_memoryEntries->appendBytes(&iopl, sizeof(iopl))) {
+ // Clean up partial created and unsaved iopl
+ if (iopl.fIOPL)
+ kernel_upl_abort(iopl.fIOPL, 0);
+ goto abortExit;
+ }
+
+ // Check for a multiple iopl's in one virtual range
+ pageIndex += numPageInfo;
+ mdOffset -= iopl.fPageOffset;
+ if (ioplSize < numBytes) {
+ numBytes -= ioplSize;
+ startPage += ioplSize;
+ mdOffset += ioplSize;
+ iopl.fPageOffset = 0;
+ if (mapper)
+ iopl.fMappedBase = mapBase + pageIndex;
+ }
+ else {
+ mdOffset += numBytes;
+ break;
+ }
+ }
+ }
+
+ return kIOReturnSuccess;
+
+abortExit:
+ {
+ dataP = getDataP(_memoryEntries);
+ UInt done = getNumIOPL(dataP, _memoryEntries->getLength());
+ ioPLBlock *ioplList = getIOPLList(dataP);
+
+ for (UInt range = 0; range < done; range++)
{
- assert( false );
- bytesLeft = withLength;
- break;
+ if (ioplList[range].fIOPL)
+ kernel_upl_abort(ioplList[range].fIOPL, 0);
}
- bytesLeft -= segmentLength;
- offset += segmentLength;
- setPosition(offset);
- }
-#else
- while (bytesLeft && (segment = getVirtualSegment(offset, &segmentLength)))
- {
- segmentLength = min(segmentLength, bytesLeft);
- bcopy(/* from */ segment, /* to */ bytes, /* size */ segmentLength);
- bytesLeft -= segmentLength;
- offset += segmentLength;
- bytes = (void *) (((UInt32) bytes) + segmentLength);
- }
-#endif
-
- return withLength - bytesLeft;
-}
-
-/*
- * writeBytes:
- *
- * Copy data to the memory descriptor's buffer from the specified buffer,
- * relative to the current position. The memory descriptor's position is
- * advanced based on the number of bytes copied.
- */
-IOByteCount IOGeneralMemoryDescriptor::writeBytes(IOByteCount offset,
- const void* bytes,IOByteCount withLength)
-{
- IOByteCount bytesLeft;
- void * segment;
- IOByteCount segmentLength;
-
- if( offset != _position)
- setPosition( offset );
-
- withLength = min(withLength, _length - _position);
- bytesLeft = withLength;
-
-#if 0
- while (bytesLeft && (_position < _length))
- {
- assert(_position <= _length);
-
- /* Compute the relative length to the end of this virtual segment. */
- segmentLength = min(_ranges.v[_positionAtIndex].length - _positionAtOffset, bytesLeft);
-
- /* Compute the relative address of this virtual segment. */
- segment = (void *)(_ranges.v[_positionAtIndex].address + _positionAtOffset);
-
- if (KERN_SUCCESS != vm_map_write_user(getMapForTask(_task, segment),
- /* from */ (vm_offset_t) bytes,
- /* to */ (vm_offset_t) segment,
- /* size */ segmentLength))
- {
- assert( false );
- bytesLeft = withLength;
- break;
- }
- bytesLeft -= segmentLength;
- offset += segmentLength;
- setPosition(offset);
- }
-#else
- while (bytesLeft && (segment = getVirtualSegment(offset, &segmentLength)))
- {
- segmentLength = min(segmentLength, bytesLeft);
- bcopy(/* from */ bytes, /* to */ segment, /* size */ segmentLength);
- // Flush cache in case we're copying code around, eg. handling a code page fault
- IOFlushProcessorCache(kernel_task, (vm_offset_t) segment, segmentLength );
-
- bytesLeft -= segmentLength;
- offset += segmentLength;
- bytes = (void *) (((UInt32) bytes) + segmentLength);
- }
-#endif
-
- return withLength - bytesLeft;
-}
-
-/*
- * getPhysicalSegment:
- *
- * Get the physical address of the buffer, relative to the current position.
- * If the current position is at the end of the buffer, a zero is returned.
- */
-IOPhysicalAddress
-IOGeneralMemoryDescriptor::getPhysicalSegment(IOByteCount offset,
- IOByteCount * lengthOfSegment)
-{
- vm_address_t virtualAddress;
- IOByteCount virtualLength;
- pmap_t virtualPMap;
- IOPhysicalAddress physicalAddress;
- IOPhysicalLength physicalLength;
-
- if( kIOMemoryRequiresWire & _flags)
- assert( _wireCount );
-
- if ((0 == _task) && (1 == _rangesCount))
- {
- assert(offset <= _length);
- if (offset >= _length)
- {
- physicalAddress = 0;
- physicalLength = 0;
- }
- else
- {
- physicalLength = _length - offset;
- physicalAddress = offset + _ranges.v[0].address;
- }
-
- if (lengthOfSegment)
- *lengthOfSegment = physicalLength;
- return physicalAddress;
- }
-
- if( offset != _position)
- setPosition( offset );
-
- assert(_position <= _length);
-
- /* Fail gracefully if the position is at (or past) the end-of-buffer. */
- if (_position >= _length)
- {
- *lengthOfSegment = 0;
- return 0;
- }
-
- /* Prepare to compute the largest contiguous physical length possible. */
-
- virtualAddress = _ranges.v[_positionAtIndex].address + _positionAtOffset;
- virtualLength = _ranges.v[_positionAtIndex].length - _positionAtOffset;
- vm_address_t virtualPage = trunc_page(virtualAddress);
- if( _task)
- virtualPMap = get_task_pmap(_task);
- else
- virtualPMap = 0;
-
- physicalAddress = (virtualAddress == _cachedVirtualAddress) ?
- _cachedPhysicalAddress : /* optimization */
- virtualPMap ?
- pmap_extract(virtualPMap, virtualAddress) :
- virtualAddress;
- physicalLength = trunc_page(physicalAddress) + page_size - physicalAddress;
-
- if (!physicalAddress && _task)
- {
- physicalAddress =
- vm_map_get_phys_page(get_task_map(_task), virtualPage);
- physicalAddress += virtualAddress - virtualPage;
- }
-
- if (physicalAddress == 0) /* memory must be wired in order to proceed */
- {
- assert(physicalAddress);
- *lengthOfSegment = 0;
- return 0;
- }
-
- /* Compute the largest contiguous physical length possible, within range. */
- IOPhysicalAddress physicalPage = trunc_page(physicalAddress);
-
- while (physicalLength < virtualLength)
- {
- physicalPage += page_size;
- virtualPage += page_size;
- _cachedVirtualAddress = virtualPage;
- _cachedPhysicalAddress = virtualPMap ?
- pmap_extract(virtualPMap, virtualPage) :
- virtualPage;
- if (!_cachedPhysicalAddress && _task)
- {
- _cachedPhysicalAddress =
- vm_map_get_phys_page(get_task_map(_task), virtualPage);
- }
-
- if (_cachedPhysicalAddress != physicalPage) break;
-
- physicalLength += page_size;
- }
-
- /* Clip contiguous physical length at the end of this range. */
- if (physicalLength > virtualLength)
- physicalLength = virtualLength;
-
- if( lengthOfSegment)
- *lengthOfSegment = physicalLength;
-
- return physicalAddress;
-}
-
-
-/*
- * getVirtualSegment:
- *
- * Get the virtual address of the buffer, relative to the current position.
- * If the memory wasn't mapped into the caller's address space, it will be
- * mapped in now. If the current position is at the end of the buffer, a
- * null is returned.
- */
-void * IOGeneralMemoryDescriptor::getVirtualSegment(IOByteCount offset,
- IOByteCount * lengthOfSegment)
-{
- if( offset != _position)
- setPosition( offset );
-
- assert(_position <= _length);
-
- /* Fail gracefully if the position is at (or past) the end-of-buffer. */
- if (_position >= _length)
- {
- *lengthOfSegment = 0;
- return 0;
- }
-
- /* Compute the relative length to the end of this virtual segment. */
- *lengthOfSegment = _ranges.v[_positionAtIndex].length - _positionAtOffset;
-
- /* Compute the relative address of this virtual segment. */
- if (_task == kernel_task)
- return (void *)(_ranges.v[_positionAtIndex].address + _positionAtOffset);
- else
- {
- vm_offset_t off;
-
- mapIntoKernel(_positionAtIndex);
-
- off = _ranges.v[_kernPtrAtIndex].address;
- off -= trunc_page(off);
-
- return (void *) (_kernPtrAligned + off + _positionAtOffset);
- }
+
+ if (mapper && mapBase)
+ mapper->iovmFree(mapBase, _pages);
+ }
+
+ return error;
}
/*
@@ -776,137 +1327,19 @@
* the memory after the I/O transfer finishes. This method needn't
* called for non-pageable memory.
*/
-IOReturn IOGeneralMemoryDescriptor::prepare(
- IODirection forDirection = kIODirectionNone)
-{
- UInt rangeIndex = 0;
-
- if((_wireCount == 0) && (kIOMemoryRequiresWire & _flags)) {
- kern_return_t rc;
-
- if(forDirection == kIODirectionNone)
- forDirection = _direction;
-
- vm_prot_t access = VM_PROT_DEFAULT; // Could be cleverer using direction
-
- //
- // Check user read/write access to the data buffer.
- //
-
- for (rangeIndex = 0; rangeIndex < _rangesCount; rangeIndex++)
- {
- vm_offset_t checkBase = trunc_page(_ranges.v[rangeIndex].address);
- vm_size_t checkSize = round_page(_ranges.v[rangeIndex].length );
-
- while (checkSize)
- {
- vm_region_basic_info_data_t regionInfo;
- mach_msg_type_number_t regionInfoSize = sizeof(regionInfo);
- vm_size_t regionSize;
-
- if ( (vm_region(
- /* map */ getMapForTask(_task, checkBase),
- /* address */ &checkBase,
- /* size */ ®ionSize,
- /* flavor */ VM_REGION_BASIC_INFO,
- /* info */ (vm_region_info_t) ®ionInfo,
- /* info size */ ®ionInfoSize,
- /* object name */ 0 ) != KERN_SUCCESS ) ||
- ( (forDirection & kIODirectionIn ) &&
- !(regionInfo.protection & VM_PROT_WRITE) ) ||
- ( (forDirection & kIODirectionOut) &&
- !(regionInfo.protection & VM_PROT_READ ) ) )
- {
- return kIOReturnVMError;
- }
-
- assert((regionSize & PAGE_MASK) == 0);
-
- regionSize = min(regionSize, checkSize);
- checkSize -= regionSize;
- checkBase += regionSize;
- } // (for each vm region)
- } // (for each io range)
-
- for (rangeIndex = 0; rangeIndex < _rangesCount; rangeIndex++) {
-
- vm_offset_t srcAlign = trunc_page(_ranges.v[rangeIndex].address);
- IOByteCount srcAlignEnd = trunc_page(_ranges.v[rangeIndex].address +
- _ranges.v[rangeIndex].length +
- page_size - 1);
-
- vm_map_t taskVMMap = getMapForTask(_task, srcAlign);
-
- rc = vm_map_wire(taskVMMap, srcAlign, srcAlignEnd, access, FALSE);
- if (KERN_SUCCESS != rc) {
- IOLog("IOMemoryDescriptor::prepare vm_map_wire failed: %d\n", rc);
- goto abortExit;
- }
-
- // If this I/O is for a user land task then protect ourselves
- // against COW and other vm_shenanigans
- if (_task && _task != kernel_task) {
- // setup a data object to hold the 'named' memory regions
- // @@@ gvdl: If we fail to allocate an OSData we will just
- // hope for the best for the time being. Lets not fail a
- // prepare at this late stage in product release.
- if (!_memoryEntries)
- _memoryEntries = OSData::withCapacity(16);
- if (_memoryEntries) {
- vm_object_offset_t desiredSize = srcAlignEnd - srcAlign;
- vm_object_offset_t entryStart = srcAlign;
- ipc_port_t memHandle;
-
- do {
- vm_object_offset_t actualSize = desiredSize;
-
- rc = mach_make_memory_entry_64
- (taskVMMap, &actualSize, entryStart,
- forDirection, &memHandle, NULL);
- if (KERN_SUCCESS != rc) {
- IOLog("IOMemoryDescriptor::prepare mach_make_memory_entry_64 failed: %d\n", rc);
- goto abortExit;
- }
-
- _memoryEntries->
- appendBytes(&memHandle, sizeof(memHandle));
- desiredSize -= actualSize;
- entryStart += actualSize;
- } while (desiredSize);
- }
- }
- }
- }
+IOReturn IOGeneralMemoryDescriptor::prepare(IODirection forDirection)
+{
+ IOReturn error = kIOReturnSuccess;
+
+ if (!_wireCount && (_flags & kIOMemoryTypeMask) == kIOMemoryTypeVirtual) {
+ error = wireVirtual(forDirection);
+ if (error)
+ return error;
+ }
+
_wireCount++;
+
return kIOReturnSuccess;
-
-abortExit:
- UInt doneIndex;
-
-
- for(doneIndex = 0; doneIndex < rangeIndex; doneIndex++) {
- vm_offset_t srcAlign = trunc_page(_ranges.v[doneIndex].address);
- IOByteCount srcAlignEnd = trunc_page(_ranges.v[doneIndex].address +
- _ranges.v[doneIndex].length +
- page_size - 1);
-
- vm_map_unwire(getMapForTask(_task, srcAlign), srcAlign,
- srcAlignEnd, FALSE);
- }
-
- if (_memoryEntries) {
- ipc_port_t *handles, *handlesEnd;
-
- handles = (ipc_port_t *) _memoryEntries->getBytesNoCopy();
- handlesEnd = (ipc_port_t *)
- ((vm_address_t) handles + _memoryEntries->getLength());
- while (handles < handlesEnd)
- ipc_port_release_send(*handles++);
- _memoryEntries->release();
- _memoryEntries = 0;
- }
-
- return kIOReturnVMError;
}
/*
@@ -918,52 +1351,36 @@
* before and after an I/O transfer involving pageable memory.
*/
-IOReturn IOGeneralMemoryDescriptor::complete(
- IODirection forDirection = kIODirectionNone)
+IOReturn IOGeneralMemoryDescriptor::complete(IODirection /* forDirection */)
{
assert(_wireCount);
- if(0 == _wireCount)
+ if (!_wireCount)
return kIOReturnSuccess;
_wireCount--;
- if((_wireCount == 0) && (kIOMemoryRequiresWire & _flags)) {
- UInt rangeIndex;
- kern_return_t rc;
-
- if(forDirection == kIODirectionNone)
- forDirection = _direction;
-
- for(rangeIndex = 0; rangeIndex < _rangesCount; rangeIndex++) {
-
- vm_offset_t srcAlign = trunc_page(_ranges.v[rangeIndex].address);
- IOByteCount srcAlignEnd = trunc_page(_ranges.v[rangeIndex].address +
- _ranges.v[rangeIndex].length +
- page_size - 1);
-
- if(forDirection == kIODirectionIn)
- pmap_modify_pages(get_task_pmap(_task), srcAlign, srcAlignEnd);
-
- rc = vm_map_unwire(getMapForTask(_task, srcAlign), srcAlign,
- srcAlignEnd, FALSE);
- if(rc != KERN_SUCCESS)
- IOLog("IOMemoryDescriptor::complete: vm_map_unwire failed: %d\n", rc);
+ if (!_wireCount) {
+ if ((_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical) {
+ /* kIOMemoryTypePhysical */
+ // DO NOTHING
}
-
- if (_memoryEntries) {
- ipc_port_t *handles, *handlesEnd;
-
- handles = (ipc_port_t *) _memoryEntries->getBytesNoCopy();
- handlesEnd = (ipc_port_t *)
- ((vm_address_t) handles + _memoryEntries->getLength());
- while (handles < handlesEnd)
- ipc_port_release_send(*handles++);
-
- _memoryEntries->release();
- _memoryEntries = 0;
- }
-
- _cachedVirtualAddress = 0;
+ else {
+ ioGMDData * dataP = getDataP(_memoryEntries);
+ ioPLBlock *ioplList = getIOPLList(dataP);
+ UInt count = getNumIOPL(dataP, _memoryEntries->getLength());
+
+ if (dataP->fMapper && _pages && ioplList[0].fMappedBase)
+ dataP->fMapper->iovmFree(ioplList[0].fMappedBase, _pages);
+
+ // Only complete iopls that we created which are for TypeVirtual
+ if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypeVirtual) {
+ for (UInt ind = 0; ind < count; ind++)
+ if (ioplList[ind].fIOPL)
+ kernel_upl_commit(ioplList[ind].fIOPL, 0, 0);
+ }
+
+ (void) _memoryEntries->initWithBytes(dataP, sizeof(ioGMDData)); // == setLength()
+ }
}
return kIOReturnSuccess;
}
@@ -972,10 +1389,11 @@
vm_map_t addressMap,
IOVirtualAddress * atAddress,
IOOptionBits options,
- IOByteCount sourceOffset = 0,
- IOByteCount length = 0 )
+ IOByteCount sourceOffset,
+ IOByteCount length )
{
kern_return_t kr;
+ ipc_port_t sharedMem = (ipc_port_t) _memEntry;
// mapping source == dest? (could be much better)
if( _task && (addressMap == get_task_map(_task)) && (options & kIOMapAnywhere)
@@ -985,53 +1403,113 @@
return( kIOReturnSuccess );
}
- if( _task && _memEntry && (_flags & kIOMemoryRequiresWire)) {
-
- do {
-
- if( (1 != _rangesCount)
- || (kIOMapDefaultCache != (options & kIOMapCacheMask)) ) {
- kr = kIOReturnUnsupported;
- continue;
+ if( 0 == sharedMem) {
+
+ vm_size_t size = _pages << PAGE_SHIFT;
+
+ if( _task) {
+#ifndef i386
+ vm_size_t actualSize = size;
+ kr = mach_make_memory_entry( get_task_map(_task),
+ &actualSize, _ranges.v[0].address,
+ VM_PROT_READ | VM_PROT_WRITE, &sharedMem,
+ NULL );
+
+ if( (KERN_SUCCESS == kr) && (actualSize != round_page_32(size))) {
+#if IOASSERT
+ IOLog("mach_make_memory_entry_64 (%08x) size (%08lx:%08x)\n",
+ _ranges.v[0].address, (UInt32)actualSize, size);
+#endif
+ kr = kIOReturnVMError;
+ ipc_port_release_send( sharedMem );
}
- if( 0 == length)
- length = getLength();
- if( (sourceOffset + length) > _ranges.v[0].length) {
- kr = kIOReturnBadArgument;
- continue;
+ if( KERN_SUCCESS != kr)
+#endif /* i386 */
+ sharedMem = MACH_PORT_NULL;
+
+ } else do {
+
+ memory_object_t pager;
+ unsigned int flags = 0;
+ addr64_t pa;
+ IOPhysicalLength segLen;
+
+ pa = getPhysicalSegment64( sourceOffset, &segLen );
+
+ if( !reserved) {
+ reserved = IONew( ExpansionData, 1 );
+ if( !reserved)
+ continue;
}
-
- ipc_port_t sharedMem = (ipc_port_t) _memEntry;
- vm_prot_t prot = VM_PROT_READ
- | ((options & kIOMapReadOnly) ? 0 : VM_PROT_WRITE);
-
- // vm_map looks for addresses above here, even when VM_FLAGS_ANYWHERE
- if( options & kIOMapAnywhere)
- *atAddress = 0;
-
- if( 0 == sharedMem)
- kr = kIOReturnVMError;
- else
- kr = KERN_SUCCESS;
-
- if( KERN_SUCCESS == kr)
- kr = vm_map( addressMap,
- atAddress,
- length, 0 /* mask */,
- (( options & kIOMapAnywhere ) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
- | VM_MAKE_TAG(VM_MEMORY_IOKIT),
- sharedMem, sourceOffset,
- false, // copy
- prot, // cur
- prot, // max
- VM_INHERIT_NONE);
-
+ reserved->pagerContig = (1 == _rangesCount);
+ reserved->memory = this;
+
+ /*What cache mode do we need*/
+ switch(options & kIOMapCacheMask ) {
+
+ case kIOMapDefaultCache:
+ default:
+ flags = IODefaultCacheBits(pa);
+ break;
+
+ case kIOMapInhibitCache:
+ flags = DEVICE_PAGER_CACHE_INHIB |
+ DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
+ break;
+
+ case kIOMapWriteThruCache:
+ flags = DEVICE_PAGER_WRITE_THROUGH |
+ DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
+ break;
+
+ case kIOMapCopybackCache:
+ flags = DEVICE_PAGER_COHERENT;
+ break;
+
+ case kIOMapWriteCombineCache:
+ flags = DEVICE_PAGER_CACHE_INHIB |
+ DEVICE_PAGER_COHERENT;
+ break;
+ }
+
+ flags |= reserved->pagerContig ? DEVICE_PAGER_CONTIGUOUS : 0;
+
+ pager = device_pager_setup( (memory_object_t) 0, (int) reserved,
+ size, flags);
+ assert( pager );
+
+ if( pager) {
+ kr = mach_memory_object_memory_entry_64( (host_t) 1, false /*internal*/,
+ size, VM_PROT_READ | VM_PROT_WRITE, pager, &sharedMem );
+
+ assert( KERN_SUCCESS == kr );
+ if( KERN_SUCCESS != kr) {
+ device_pager_deallocate( pager );
+ pager = MACH_PORT_NULL;
+ sharedMem = MACH_PORT_NULL;
+ }
+ }
+ if( pager && sharedMem)
+ reserved->devicePager = pager;
+ else {
+ IODelete( reserved, ExpansionData, 1 );
+ reserved = 0;
+ }
+
} while( false );
- } else
- kr = super::doMap( addressMap, atAddress,
+ _memEntry = (void *) sharedMem;
+ }
+
+#ifndef i386
+ if( 0 == sharedMem)
+ kr = kIOReturnVMError;
+ else
+#endif
+ kr = super::doMap( addressMap, atAddress,
options, sourceOffset, length );
+
return( kr );
}
@@ -1041,7 +1519,7 @@
IOByteCount length )
{
// could be much better
- if( _task && (addressMap == getMapForTask(_task, _ranges.v[0].address)) && (1 == _rangesCount)
+ if( _task && (addressMap == get_task_map(_task)) && (1 == _rangesCount)
&& (logical == _ranges.v[0].address)
&& (length <= _ranges.v[0].length) )
return( kIOReturnSuccess );
@@ -1060,15 +1538,11 @@
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-static IORecursiveLock * gIOMemoryLock;
-
-#define LOCK IORecursiveLockLock( gIOMemoryLock)
-#define UNLOCK IORecursiveLockUnlock( gIOMemoryLock)
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-OSDefineMetaClass( IOMemoryMap, OSObject )
-OSDefineAbstractStructors( IOMemoryMap, OSObject )
+OSDefineMetaClassAndAbstractStructors( IOMemoryMap, OSObject )
+
+/* inline function implementation */
+IOPhysicalAddress IOMemoryMap::getPhysicalAddress()
+ { return( getPhysicalSegment( 0, 0 )); }
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -1085,8 +1559,11 @@
vm_map_t addressMap;
IOOptionBits options;
+protected:
+ virtual void taggedRelease(const void *tag = 0) const;
+ virtual void free();
+
public:
- virtual void free();
// IOMemoryMap methods
virtual IOVirtualAddress getVirtualAddress();
@@ -1102,7 +1579,7 @@
IOByteCount * length);
// for IOMemoryDescriptor use
- _IOMemoryMap * isCompatible(
+ _IOMemoryMap * copyCompatible(
IOMemoryDescriptor * owner,
task_t intoTask,
IOVirtualAddress toAddress,
@@ -1110,13 +1587,13 @@
IOByteCount offset,
IOByteCount length );
- bool init(
+ bool initCompatible(
IOMemoryDescriptor * memory,
IOMemoryMap * superMap,
IOByteCount offset,
IOByteCount length );
- bool init(
+ bool initWithDescriptor(
IOMemoryDescriptor * memory,
task_t intoTask,
IOVirtualAddress toAddress,
@@ -1137,7 +1614,7 @@
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-bool _IOMemoryMap::init(
+bool _IOMemoryMap::initCompatible(
IOMemoryDescriptor * _memory,
IOMemoryMap * _superMap,
IOByteCount _offset,
@@ -1167,7 +1644,7 @@
return( true );
}
-bool _IOMemoryMap::init(
+bool _IOMemoryMap::initWithDescriptor(
IOMemoryDescriptor * _memory,
task_t intoTask,
IOVirtualAddress toAddress,
@@ -1186,7 +1663,7 @@
addressMap = get_task_map(intoTask);
if( !addressMap)
return( false);
- kernel_vm_map_reference(addressMap);
+ vm_map_reference(addressMap);
_memory->retain();
memory = _memory;
@@ -1216,98 +1693,298 @@
return( ok );
}
+struct IOMemoryDescriptorMapAllocRef
+{
+ ipc_port_t sharedMem;
+ vm_size_t size;
+ vm_offset_t mapped;
+ IOByteCount sourceOffset;
+ IOOptionBits options;
+};
+
+static kern_return_t IOMemoryDescriptorMapAlloc(vm_map_t map, void * _ref)
+{
+ IOMemoryDescriptorMapAllocRef * ref = (IOMemoryDescriptorMapAllocRef *)_ref;
+ IOReturn err;
+
+ do {
+ if( ref->sharedMem) {
+ vm_prot_t prot = VM_PROT_READ
+ | ((ref->options & kIOMapReadOnly) ? 0 : VM_PROT_WRITE);
+
+ // set memory entry cache
+ vm_prot_t memEntryCacheMode = prot | MAP_MEM_ONLY;
+ switch (ref->options & kIOMapCacheMask)
+ {
+ case kIOMapInhibitCache:
+ SET_MAP_MEM(MAP_MEM_IO, memEntryCacheMode);
+ break;
+
+ case kIOMapWriteThruCache:
+ SET_MAP_MEM(MAP_MEM_WTHRU, memEntryCacheMode);
+ break;
+
+ case kIOMapWriteCombineCache:
+ SET_MAP_MEM(MAP_MEM_WCOMB, memEntryCacheMode);
+ break;
+
+ case kIOMapCopybackCache:
+ SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode);
+ break;
+
+ case kIOMapDefaultCache:
+ default:
+ SET_MAP_MEM(MAP_MEM_NOOP, memEntryCacheMode);
+ break;
+ }
+
+ vm_size_t unused = 0;
+
+ err = mach_make_memory_entry( NULL /*unused*/, &unused, 0 /*unused*/,
+ memEntryCacheMode, NULL, ref->sharedMem );
+ if (KERN_SUCCESS != err)
+ IOLog("MAP_MEM_ONLY failed %d\n", err);
+
+ err = vm_map( map,
+ &ref->mapped,
+ ref->size, 0 /* mask */,
+ (( ref->options & kIOMapAnywhere ) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
+ | VM_MAKE_TAG(VM_MEMORY_IOKIT),
+ ref->sharedMem, ref->sourceOffset,
+ false, // copy
+ prot, // cur
+ prot, // max
+ VM_INHERIT_NONE);
+
+ if( KERN_SUCCESS != err) {
+ ref->mapped = 0;
+ continue;
+ }
+
+ } else {
+
+ err = vm_allocate( map, &ref->mapped, ref->size,
+ ((ref->options & kIOMapAnywhere) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
+ | VM_MAKE_TAG(VM_MEMORY_IOKIT) );
+
+ if( KERN_SUCCESS != err) {
+ ref->mapped = 0;
+ continue;
+ }
+
+ // we have to make sure that these guys don't get copied if we fork.
+ err = vm_inherit( map, ref->mapped, ref->size, VM_INHERIT_NONE);
+ assert( KERN_SUCCESS == err );
+ }
+
+ } while( false );
+
+ return( err );
+}
+
+
IOReturn IOMemoryDescriptor::doMap(
vm_map_t addressMap,
IOVirtualAddress * atAddress,
IOOptionBits options,
- IOByteCount sourceOffset = 0,
- IOByteCount length = 0 )
+ IOByteCount sourceOffset,
+ IOByteCount length )
{
IOReturn err = kIOReturnSuccess;
- vm_size_t ourSize;
- vm_size_t bytes;
- vm_offset_t mapped;
+ memory_object_t pager;
vm_address_t logical;
IOByteCount pageOffset;
+ IOPhysicalAddress sourceAddr;
+ IOMemoryDescriptorMapAllocRef ref;
+
+ ref.sharedMem = (ipc_port_t) _memEntry;
+ ref.sourceOffset = sourceOffset;
+ ref.options = options;
+
+ do {
+
+ if( 0 == length)
+ length = getLength();
+
+ sourceAddr = getSourceSegment( sourceOffset, NULL );
+ assert( sourceAddr );
+ pageOffset = sourceAddr - trunc_page_32( sourceAddr );
+
+ ref.size = round_page_32( length + pageOffset );
+
+ logical = *atAddress;
+ if( options & kIOMapAnywhere)
+ // vm_map looks for addresses above here, even when VM_FLAGS_ANYWHERE
+ ref.mapped = 0;
+ else {
+ ref.mapped = trunc_page_32( logical );
+ if( (logical - ref.mapped) != pageOffset) {
+ err = kIOReturnVMError;
+ continue;
+ }
+ }
+
+ if( ref.sharedMem && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
+ err = IOIteratePageableMaps( ref.size, &IOMemoryDescriptorMapAlloc, &ref );
+ else
+ err = IOMemoryDescriptorMapAlloc( addressMap, &ref );
+
+ if( err != KERN_SUCCESS)
+ continue;
+
+ if( reserved)
+ pager = (memory_object_t) reserved->devicePager;
+ else
+ pager = MACH_PORT_NULL;
+
+ if( !ref.sharedMem || pager )
+ err = handleFault( pager, addressMap, ref.mapped, sourceOffset, length, options );
+
+ } while( false );
+
+ if( err != KERN_SUCCESS) {
+ if( ref.mapped)
+ doUnmap( addressMap, ref.mapped, ref.size );
+ *atAddress = NULL;
+ } else
+ *atAddress = ref.mapped + pageOffset;
+
+ return( err );
+}
+
+enum {
+ kIOMemoryRedirected = 0x00010000
+};
+
+IOReturn IOMemoryDescriptor::handleFault(
+ void * _pager,
+ vm_map_t addressMap,
+ IOVirtualAddress address,
+ IOByteCount sourceOffset,
+ IOByteCount length,
+ IOOptionBits options )
+{
+ IOReturn err = kIOReturnSuccess;
+ memory_object_t pager = (memory_object_t) _pager;
+ vm_size_t size;
+ vm_size_t bytes;
+ vm_size_t page;
+ IOByteCount pageOffset;
+ IOByteCount pagerOffset;
IOPhysicalLength segLen;
- IOPhysicalAddress physAddr;
-
- if( 0 == length)
- length = getLength();
-
- physAddr = getPhysicalSegment( sourceOffset, &segLen );
+ addr64_t physAddr;
+
+ if( !addressMap) {
+
+ if( kIOMemoryRedirected & _flags) {
+#ifdef DEBUG
+ IOLog("sleep mem redirect %p, %lx\n", this, sourceOffset);
+#endif
+ do {
+ SLEEP;
+ } while( kIOMemoryRedirected & _flags );
+ }
+
+ return( kIOReturnSuccess );
+ }
+
+ physAddr = getPhysicalSegment64( sourceOffset, &segLen );
assert( physAddr );
-
- pageOffset = physAddr - trunc_page( physAddr );
- ourSize = length + pageOffset;
+ pageOffset = physAddr - trunc_page_64( physAddr );
+ pagerOffset = sourceOffset;
+
+ size = length + pageOffset;
physAddr -= pageOffset;
- logical = *atAddress;
- if( 0 == (options & kIOMapAnywhere)) {
- mapped = trunc_page( logical );
- if( (logical - mapped) != pageOffset)
- err = kIOReturnVMError;
- }
- if( kIOReturnSuccess == err)
- err = vm_allocate( addressMap, &mapped, ourSize,
- ((options & kIOMapAnywhere) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
- | VM_MAKE_TAG(VM_MEMORY_IOKIT) );
-
- if( err) {
-#ifdef DEBUG
- kprintf("IOMemoryDescriptor::doMap: vm_allocate() "
- "returned %08x\n", err);
-#endif
- return( err);
- }
-
- // we have to make sure that these guys don't get copied if we fork.
- err = vm_inherit( addressMap, mapped, ourSize, VM_INHERIT_NONE);
- if( err != KERN_SUCCESS) {
- doUnmap( addressMap, mapped, ourSize); // back out
- return( err);
- }
-
- logical = mapped;
- *atAddress = mapped + pageOffset;
-
segLen += pageOffset;
- bytes = ourSize;
+ bytes = size;
do {
// in the middle of the loop only map whole pages
if( segLen >= bytes)
segLen = bytes;
- else if( segLen != trunc_page( segLen))
+ else if( segLen != trunc_page_32( segLen))
err = kIOReturnVMError;
- if( physAddr != trunc_page( physAddr))
+ if( physAddr != trunc_page_64( physAddr))
err = kIOReturnBadArgument;
#ifdef DEBUG
if( kIOLogMapping & gIOKitDebug)
- kprintf("_IOMemoryMap::map(%x) %08x->%08x:%08x\n",
- addressMap, mapped + pageOffset, physAddr + pageOffset,
+ IOLog("_IOMemoryMap::map(%p) %08lx->%08qx:%08lx\n",
+ addressMap, address + pageOffset, physAddr + pageOffset,
segLen - pageOffset);
#endif
- if( kIOReturnSuccess == err)
- err = IOMapPages( addressMap, mapped, physAddr, segLen, options );
+
+
+
+
+#ifdef i386
+ /* i386 doesn't support faulting on device memory yet */
+ if( addressMap && (kIOReturnSuccess == err))
+ err = IOMapPages( addressMap, address, (IOPhysicalAddress) physAddr, segLen, options );
+ assert( KERN_SUCCESS == err );
if( err)
break;
-
+#endif
+
+ if( pager) {
+ if( reserved && reserved->pagerContig) {
+ IOPhysicalLength allLen;
+ addr64_t allPhys;
+
+ allPhys = getPhysicalSegment64( 0, &allLen );
+ assert( allPhys );
+ err = device_pager_populate_object( pager, 0, allPhys >> PAGE_SHIFT, round_page_32(allLen) );
+
+ } else {
+
+ for( page = 0;
+ (page < segLen) && (KERN_SUCCESS == err);
+ page += page_size) {
+ err = device_pager_populate_object(pager, pagerOffset,
+ (ppnum_t)((physAddr + page) >> PAGE_SHIFT), page_size);
+ pagerOffset += page_size;
+ }
+ }
+ assert( KERN_SUCCESS == err );
+ if( err)
+ break;
+ }
+#ifndef i386
+ /* *** ALERT *** */
+ /* *** Temporary Workaround *** */
+
+ /* This call to vm_fault causes an early pmap level resolution */
+ /* of the mappings created above. Need for this is in absolute */
+ /* violation of the basic tenet that the pmap layer is a cache. */
+ /* Further, it implies a serious I/O architectural violation on */
+ /* the part of some user of the mapping. As of this writing, */
+ /* the call to vm_fault is needed because the NVIDIA driver */
+ /* makes a call to pmap_extract. The NVIDIA driver needs to be */
+ /* fixed as soon as possible. The NVIDIA driver should not */
+ /* need to query for this info as it should know from the doMap */
+ /* call where the physical memory is mapped. When a query is */
+ /* necessary to find a physical mapping, it should be done */
+ /* through an iokit call which includes the mapped memory */
+ /* handle. This is required for machine architecture independence.*/
+
+ if(!(kIOMemoryRedirected & _flags)) {
+ vm_fault(addressMap, address, 3, FALSE, FALSE, NULL, 0);
+ }
+
+ /* *** Temporary Workaround *** */
+ /* *** ALERT *** */
+#endif
sourceOffset += segLen - pageOffset;
- mapped += segLen;
+ address += segLen;
bytes -= segLen;
pageOffset = 0;
} while( bytes
- && (physAddr = getPhysicalSegment( sourceOffset, &segLen )));
+ && (physAddr = getPhysicalSegment64( sourceOffset, &segLen )));
if( bytes)
err = kIOReturnBadArgument;
- if( err)
- doUnmap( addressMap, logical, ourSize );
- else
- mapped = true;
return( err );
}
@@ -1325,9 +2002,14 @@
addressMap, logical, length );
#endif
- if( (addressMap == kernel_map) || (addressMap == get_task_map(current_task())))
+ if( true /* && (addressMap == kernel_map) || (addressMap == get_task_map(current_task()))*/) {
+
+ if( _memEntry && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
+ addressMap = IOPageableMapForAddress( logical );
+
err = vm_deallocate( addressMap, logical, length );
- else
+
+ } else
err = kIOReturnSuccess;
return( err );
@@ -1349,6 +2031,13 @@
iter->release();
}
} while( false );
+
+ if( redirect)
+ _flags |= kIOMemoryRedirected;
+ else {
+ _flags &= ~kIOMemoryRedirected;
+ WAKEUP;
+ }
UNLOCK;
@@ -1364,7 +2053,6 @@
IOReturn IOSubMemoryDescriptor::redirect( task_t safeTask, bool redirect )
{
-// temporary binary compatibility IOMemoryDescriptor::redirect( safeTask, redirect );
return( _parent->redirect( safeTask, redirect ));
}
@@ -1380,16 +2068,17 @@
if( logical && addressMap
&& (get_task_map( safeTask) != addressMap)
&& (0 == (options & kIOMapStatic))) {
-
+
IOUnmapPages( addressMap, logical, length );
if( !redirect) {
err = vm_deallocate( addressMap, logical, length );
err = memory->doMap( addressMap, &logical,
- (options & ~kIOMapAnywhere) /*| kIOMapReserve*/ );
+ (options & ~kIOMapAnywhere) /*| kIOMapReserve*/,
+ offset, length );
} else
err = kIOReturnSuccess;
#ifdef DEBUG
- IOLog("IOMemoryMap::redirect(%d, %x) %x from %lx\n", redirect, err, logical, addressMap);
+ IOLog("IOMemoryMap::redirect(%d, %p) %x:%lx from %p\n", redirect, this, logical, length, addressMap);
#endif
}
UNLOCK;
@@ -1430,6 +2119,17 @@
}
addressTask = 0;
logical = 0;
+ UNLOCK;
+}
+
+// Overload the release mechanism. All mappings must be a member
+// of a memory descriptors _mappings set. This means that we
+// always have 2 references on a mapping. When either of these mappings
+// are released we need to free ourselves.
+void _IOMemoryMap::taggedRelease(const void *tag) const
+{
+ LOCK;
+ super::taggedRelease(tag, 2);
UNLOCK;
}
@@ -1478,7 +2178,7 @@
return( memory );
}
-_IOMemoryMap * _IOMemoryMap::isCompatible(
+_IOMemoryMap * _IOMemoryMap::copyCompatible(
IOMemoryDescriptor * owner,
task_t task,
IOVirtualAddress toAddress,
@@ -1488,9 +2188,12 @@
{
_IOMemoryMap * mapping;
- if( (!task) || (task != getAddressTask()))
+ if( (!task) || (!addressMap) || (addressMap != get_task_map(task)))
return( 0 );
- if( (options ^ _options) & (kIOMapCacheMask | kIOMapReadOnly))
+ if( (options ^ _options) & kIOMapReadOnly)
+ return( 0 );
+ if( (kIOMapDefaultCache != (_options & kIOMapCacheMask))
+ && ((options ^ _options) & kIOMapCacheMask))
return( 0 );
if( (0 == (_options & kIOMapAnywhere)) && (logical != toAddress))
@@ -1511,7 +2214,7 @@
} else {
mapping = new _IOMemoryMap;
if( mapping
- && !mapping->init( owner, this, _offset, _length )) {
+ && !mapping->initCompatible( owner, this, _offset, _length )) {
mapping->release();
mapping = 0;
}
@@ -1543,6 +2246,9 @@
{
if( 0 == gIOMemoryLock)
gIOMemoryLock = IORecursiveLockAlloc();
+
+ IORegistryEntry::getRegistryRoot()->setProperty(kIOMaximumMappedIOByteCountKey,
+ ptoa_64(gIOMaximumMappedIOPageCount), 64);
}
void IOMemoryDescriptor::free( void )
@@ -1556,7 +2262,7 @@
IOMemoryMap * IOMemoryDescriptor::setMapping(
task_t intoTask,
IOVirtualAddress mapAddress,
- IOOptionBits options = 0 )
+ IOOptionBits options )
{
_IOMemoryMap * map;
@@ -1565,7 +2271,7 @@
LOCK;
if( map
- && !map->init( this, intoTask, mapAddress,
+ && !map->initWithDescriptor( this, intoTask, mapAddress,
options | kIOMapStatic, 0, getLength() )) {
map->release();
map = 0;
@@ -1579,7 +2285,7 @@
}
IOMemoryMap * IOMemoryDescriptor::map(
- IOOptionBits options = 0 )
+ IOOptionBits options )
{
return( makeMapping( this, kernel_task, 0,
@@ -1591,8 +2297,8 @@
task_t intoTask,
IOVirtualAddress toAddress,
IOOptionBits options,
- IOByteCount offset = 0,
- IOByteCount length = 0 )
+ IOByteCount offset,
+ IOByteCount length )
{
if( 0 == length)
length = getLength();
@@ -1619,7 +2325,7 @@
while( (mapping = (_IOMemoryMap *) iter->getNextObject())) {
- if( (mapping = mapping->isCompatible(
+ if( (mapping = mapping->copyCompatible(
owner, intoTask, toAddress,
options | kIOMapReference,
offset, length )))
@@ -1638,10 +2344,11 @@
mapping = new _IOMemoryMap;
if( mapping
- && !mapping->init( owner, intoTask, toAddress, options,
+ && !mapping->initWithDescriptor( owner, intoTask, toAddress, options,
offset, length )) {
-
+#ifdef DEBUG
IOLog("Didn't make map %08lx : %08lx\n", offset, length );
+#endif
mapping->release();
mapping = 0;
}
@@ -1661,19 +2368,16 @@
if( mapping) {
if( 0 == _mappings)
_mappings = OSSet::withCapacity(1);
- if( _mappings && _mappings->setObject( mapping ))
- mapping->release(); /* really */
+ if( _mappings )
+ _mappings->setObject( mapping );
}
}
void IOMemoryDescriptor::removeMapping(
IOMemoryMap * mapping )
{
- if( _mappings) {
- mapping->retain();
- mapping->retain();
+ if( _mappings)
_mappings->removeObject( mapping);
- }
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -1687,22 +2391,38 @@
bool IOSubMemoryDescriptor::initSubRange( IOMemoryDescriptor * parent,
IOByteCount offset, IOByteCount length,
- IODirection withDirection )
-{
- if( !super::init())
- return( false );
-
+ IODirection direction )
+{
if( !parent)
return( false);
if( (offset + length) > parent->getLength())
return( false);
+
+ /*
+ * We can check the _parent instance variable before having ever set it
+ * to an initial value because I/O Kit guarantees that all our instance
+ * variables are zeroed on an object's allocation.
+ */
+
+ if( !_parent) {
+ if( !super::init())
+ return( false );
+ } else {
+ /*
+ * An existing memory descriptor is being retargeted to
+ * point to somewhere else. Clean up our present state.
+ */
+
+ _parent->release();
+ _parent = 0;
+ }
parent->retain();
_parent = parent;
_start = offset;
_length = length;
- _direction = withDirection;
+ _direction = direction;
_tag = parent->getTag();
return( true );
@@ -1739,6 +2459,28 @@
return( address );
}
+IOPhysicalAddress IOSubMemoryDescriptor::getSourceSegment( IOByteCount offset,
+ IOByteCount * length )
+{
+ IOPhysicalAddress address;
+ IOByteCount actualLength;
+
+ assert(offset <= _length);
+
+ if( length)
+ *length = 0;
+
+ if( offset >= _length)
+ return( 0 );
+
+ address = _parent->getSourceSegment( offset + _start, &actualLength );
+
+ if( address && length)
+ *length = min( _length - offset, actualLength );
+
+ return( address );
+}
+
void * IOSubMemoryDescriptor::getVirtualSegment(IOByteCount offset,
IOByteCount * lengthOfSegment)
{
@@ -1746,7 +2488,7 @@
}
IOByteCount IOSubMemoryDescriptor::readBytes(IOByteCount offset,
- void * bytes, IOByteCount withLength)
+ void * bytes, IOByteCount length)
{
IOByteCount byteCount;
@@ -1757,14 +2499,14 @@
LOCK;
byteCount = _parent->readBytes( _start + offset, bytes,
- min(withLength, _length - offset) );
+ min(length, _length - offset) );
UNLOCK;
return( byteCount );
}
IOByteCount IOSubMemoryDescriptor::writeBytes(IOByteCount offset,
- const void* bytes, IOByteCount withLength)
+ const void* bytes, IOByteCount length)
{
IOByteCount byteCount;
@@ -1775,14 +2517,14 @@
LOCK;
byteCount = _parent->writeBytes( _start + offset, bytes,
- min(withLength, _length - offset) );
+ min(length, _length - offset) );
UNLOCK;
return( byteCount );
}
IOReturn IOSubMemoryDescriptor::prepare(
- IODirection forDirection = kIODirectionNone)
+ IODirection forDirection)
{
IOReturn err;
@@ -1794,7 +2536,7 @@
}
IOReturn IOSubMemoryDescriptor::complete(
- IODirection forDirection = kIODirectionNone)
+ IODirection forDirection)
{
IOReturn err;
@@ -1822,6 +2564,12 @@
_start + offset, length );
if( !mapping)
+ mapping = (IOMemoryMap *) _parent->makeMapping(
+ _parent, intoTask,
+ toAddress,
+ options, _start + offset, length );
+
+ if( !mapping)
mapping = super::makeMapping( owner, intoTask, toAddress, options,
offset, length );
@@ -1832,17 +2580,17 @@
bool
IOSubMemoryDescriptor::initWithAddress(void * address,
- IOByteCount withLength,
- IODirection withDirection)
+ IOByteCount length,
+ IODirection direction)
{
return( false );
}
bool
IOSubMemoryDescriptor::initWithAddress(vm_address_t address,
- IOByteCount withLength,
- IODirection withDirection,
- task_t withTask)
+ IOByteCount length,
+ IODirection direction,
+ task_t task)
{
return( false );
}
@@ -1850,8 +2598,8 @@
bool
IOSubMemoryDescriptor::initWithPhysicalAddress(
IOPhysicalAddress address,
- IOByteCount withLength,
- IODirection withDirection )
+ IOByteCount length,
+ IODirection direction )
{
return( false );
}
@@ -1860,9 +2608,9 @@
IOSubMemoryDescriptor::initWithRanges(
IOVirtualRange * ranges,
UInt32 withCount,
- IODirection withDirection,
- task_t withTask,
- bool asReference = false)
+ IODirection direction,
+ task_t task,
+ bool asReference)
{
return( false );
}
@@ -1870,17 +2618,150 @@
bool
IOSubMemoryDescriptor::initWithPhysicalRanges( IOPhysicalRange * ranges,
UInt32 withCount,
- IODirection withDirection,
- bool asReference = false)
+ IODirection direction,
+ bool asReference)
{
return( false );
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 0);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 1);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 2);
+bool IOGeneralMemoryDescriptor::serialize(OSSerialize * s) const
+{
+ OSSymbol const *keys[2];
+ OSObject *values[2];
+ IOVirtualRange *vcopy;
+ unsigned int index, nRanges;
+ bool result;
+
+ if (s == NULL) return false;
+ if (s->previouslySerialized(this)) return true;
+
+ // Pretend we are an array.
+ if (!s->addXMLStartTag(this, "array")) return false;
+
+ nRanges = _rangesCount;
+ vcopy = (IOVirtualRange *) IOMalloc(sizeof(IOVirtualRange) * nRanges);
+ if (vcopy == 0) return false;
+
+ keys[0] = OSSymbol::withCString("address");
+ keys[1] = OSSymbol::withCString("length");
+
+ result = false;
+ values[0] = values[1] = 0;
+
+ // From this point on we can go to bail.
+
+ // Copy the volatile data so we don't have to allocate memory
+ // while the lock is held.
+ LOCK;
+ if (nRanges == _rangesCount) {
+ for (index = 0; index < nRanges; index++) {
+ vcopy[index] = _ranges.v[index];
+ }
+ } else {
+ // The descriptor changed out from under us. Give up.
+ UNLOCK;
+ result = false;
+ goto bail;
+ }
+ UNLOCK;
+
+ for (index = 0; index < nRanges; index++)
+ {
+ values[0] = OSNumber::withNumber(_ranges.v[index].address, sizeof(_ranges.v[index].address) * 8);
+ if (values[0] == 0) {
+ result = false;
+ goto bail;
+ }
+ values[1] = OSNumber::withNumber(_ranges.v[index].length, sizeof(_ranges.v[index].length) * 8);
+ if (values[1] == 0) {
+ result = false;
+ goto bail;
+ }
+ OSDictionary *dict = OSDictionary::withObjects((const OSObject **)values, (const OSSymbol **)keys, 2);
+ if (dict == 0) {
+ result = false;
+ goto bail;
+ }
+ values[0]->release();
+ values[1]->release();
+ values[0] = values[1] = 0;
+
+ result = dict->serialize(s);
+ dict->release();
+ if (!result) {
+ goto bail;
+ }
+ }
+ result = s->addXMLEndTag("array");
+
+ bail:
+ if (values[0])
+ values[0]->release();
+ if (values[1])
+ values[1]->release();
+ if (keys[0])
+ keys[0]->release();
+ if (keys[1])
+ keys[1]->release();
+ if (vcopy)
+ IOFree(vcopy, sizeof(IOVirtualRange) * nRanges);
+ return result;
+}
+
+bool IOSubMemoryDescriptor::serialize(OSSerialize * s) const
+{
+ if (!s) {
+ return (false);
+ }
+ if (s->previouslySerialized(this)) return true;
+
+ // Pretend we are a dictionary.
+ // We must duplicate the functionality of OSDictionary here
+ // because otherwise object references will not work;
+ // they are based on the value of the object passed to
+ // previouslySerialized and addXMLStartTag.
+
+ if (!s->addXMLStartTag(this, "dict")) return false;
+
+ char const *keys[3] = {"offset", "length", "parent"};
+
+ OSObject *values[3];
+ values[0] = OSNumber::withNumber(_start, sizeof(_start) * 8);
+ if (values[0] == 0)
+ return false;
+ values[1] = OSNumber::withNumber(_length, sizeof(_length) * 8);
+ if (values[1] == 0) {
+ values[0]->release();
+ return false;
+ }
+ values[2] = _parent;
+
+ bool result = true;
+ for (int i=0; i<3; i++) {
+ if (!s->addString("<key>") ||
+ !s->addString(keys[i]) ||
+ !s->addXMLEndTag("key") ||
+ !values[i]->serialize(s)) {
+ result = false;
+ break;
+ }
+ }
+ values[0]->release();
+ values[1]->release();
+ if (!result) {
+ return false;
+ }
+
+ return s->addXMLEndTag("dict");
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 0);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 1);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 2);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 3);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 4);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 5);
@@ -1894,3 +2775,7 @@
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 13);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 14);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 15);
+
+/* ex-inline function implementation */
+IOPhysicalAddress IOMemoryDescriptor::getPhysicalAddress()
+ { return( getPhysicalSegment( 0, 0 )); }