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--- xnu/xnu-1228/iokit/Kernel/IOBufferMemoryDescriptor.cpp
+++ xnu/xnu-2050.9.2/iokit/Kernel/IOBufferMemoryDescriptor.cpp
@@ -25,26 +25,32 @@
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
+
+#define _IOMEMORYDESCRIPTOR_INTERNAL_
+
#include <IOKit/assert.h>
#include <IOKit/system.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOMapper.h>
#include <IOKit/IOBufferMemoryDescriptor.h>
+#include <libkern/OSDebug.h>
#include "IOKitKernelInternal.h"
-#include "IOCopyMapper.h"
__BEGIN_DECLS
void ipc_port_release_send(ipc_port_t port);
#include <vm/pmap.h>
-vm_map_t IOPageableMapForAddress( vm_address_t address );
__END_DECLS
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-volatile ppnum_t gIOHighestAllocatedPage;
+enum
+{
+ kInternalFlagPhysical = 0x00000001,
+ kInternalFlagPageSized = 0x00000002
+};
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -52,50 +58,9 @@
OSDefineMetaClassAndStructors(IOBufferMemoryDescriptor,
IOGeneralMemoryDescriptor);
-bool IOBufferMemoryDescriptor::initWithAddress(
- void * /* address */ ,
- IOByteCount /* withLength */ ,
- IODirection /* withDirection */ )
-{
- return false;
-}
-
-bool IOBufferMemoryDescriptor::initWithAddress(
- vm_address_t /* address */ ,
- IOByteCount /* withLength */ ,
- IODirection /* withDirection */ ,
- task_t /* withTask */ )
-{
- return false;
-}
-
-bool IOBufferMemoryDescriptor::initWithPhysicalAddress(
- IOPhysicalAddress /* address */ ,
- IOByteCount /* withLength */ ,
- IODirection /* withDirection */ )
-{
- return false;
-}
-
-bool IOBufferMemoryDescriptor::initWithPhysicalRanges(
- IOPhysicalRange * /* ranges */ ,
- UInt32 /* withCount */ ,
- IODirection /* withDirection */ ,
- bool /* asReference */ )
-{
- return false;
-}
-
-bool IOBufferMemoryDescriptor::initWithRanges(
- IOVirtualRange * /* ranges */ ,
- UInt32 /* withCount */ ,
- IODirection /* withDirection */ ,
- task_t /* withTask */ ,
- bool /* asReference */ )
-{
- return false;
-}
-
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef __LP64__
bool IOBufferMemoryDescriptor::initWithOptions(
IOOptionBits options,
vm_size_t capacity,
@@ -105,6 +70,7 @@
mach_vm_address_t physicalMask = 0;
return (initWithPhysicalMask(inTask, options, capacity, alignment, physicalMask));
}
+#endif /* !__LP64__ */
bool IOBufferMemoryDescriptor::initWithPhysicalMask(
task_t inTask,
@@ -116,39 +82,51 @@
kern_return_t kr;
task_t mapTask = NULL;
vm_map_t vmmap = NULL;
- addr64_t lastIOAddr;
- IOAddressRange range;
- IOOptionBits iomdOptions = kIOMemoryTypeVirtual64;
+ mach_vm_address_t highestMask = 0;
+ IOOptionBits iomdOptions = kIOMemoryTypeVirtual64 | kIOMemoryAsReference;
if (!capacity)
return false;
- _options = options;
- _capacity = capacity;
- _physAddrs = 0;
- _physSegCount = 0;
- _buffer = 0;
- range.address = 0;
- range.length = 0;
- _ranges.v64 = ⦥
-
- // Grab the direction and the Auto Prepare bits from the Buffer MD options
- iomdOptions |= options & (kIOMemoryDirectionMask | kIOMemoryAutoPrepare);
-
- if ((options & (kIOMemorySharingTypeMask | kIOMapCacheMask)) && (alignment < page_size))
+ _options = options;
+ _capacity = capacity;
+ _internalFlags = 0;
+ _internalReserved = 0;
+ _buffer = 0;
+
+ _ranges.v64 = IONew(IOAddressRange, 1);
+ if (!_ranges.v64)
+ return (false);
+ _ranges.v64->address = 0;
+ _ranges.v64->length = 0;
+ // make sure super::free doesn't dealloc _ranges before super::init
+ _flags = kIOMemoryAsReference;
+
+ // Grab IOMD bits from the Buffer MD options
+ iomdOptions |= (options & kIOBufferDescriptorMemoryFlags);
+
+ if (physicalMask && (alignment <= 1))
+ {
+ alignment = ((physicalMask ^ (-1ULL)) & (physicalMask - 1));
+ highestMask = (physicalMask | alignment);
+ alignment++;
+ if (alignment < page_size)
+ alignment = page_size;
+ }
+
+ if ((options & (kIOMemorySharingTypeMask | kIOMapCacheMask | kIOMemoryClearEncrypt)) && (alignment < page_size))
alignment = page_size;
- if (physicalMask && (alignment <= 1))
- alignment = ((physicalMask ^ PAGE_MASK) & PAGE_MASK) + 1;
+ if (alignment >= page_size)
+ capacity = round_page(capacity);
+
+ if (alignment > page_size)
+ options |= kIOMemoryPhysicallyContiguous;
_alignment = alignment;
- if (((inTask != kernel_task) && !(options & kIOMemoryPageable)) ||
- (physicalMask && (options & kIOMapCacheMask)))
+ if ((inTask != kernel_task) && !(options & kIOMemoryPageable))
return false;
-
- if ((options & kIOMemoryPhysicallyContiguous) && !physicalMask)
- physicalMask = 0xFFFFFFFF;
// set flags for entry + object create
vm_prot_t memEntryCacheMode = VM_PROT_READ | VM_PROT_WRITE;
@@ -170,6 +148,10 @@
case kIOMapCopybackCache:
SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode);
+ break;
+
+ case kIOMapCopybackInnerCache:
+ SET_MAP_MEM(MAP_MEM_INNERWBACK, memEntryCacheMode);
break;
case kIOMapDefaultCache:
@@ -193,58 +175,50 @@
else
{
memEntryCacheMode |= MAP_MEM_NAMED_REUSE;
-
- if (IOMapper::gSystem)
- // assuming mapped space is 2G
- lastIOAddr = (1UL << 31) - PAGE_SIZE;
- else
- lastIOAddr = ptoa_64(gIOHighestAllocatedPage);
-
- if (physicalMask && (lastIOAddr != (lastIOAddr & physicalMask)))
+ vmmap = kernel_map;
+
+ // Buffer shouldn't auto prepare they should be prepared explicitly
+ // But it never was enforced so what are you going to do?
+ iomdOptions |= kIOMemoryAutoPrepare;
+
+ /* Allocate a wired-down buffer inside kernel space. */
+
+ if ((options & kIOMemoryPhysicallyContiguous) || highestMask || (alignment > page_size))
{
- mach_vm_address_t address;
- iomdOptions &= ~kIOMemoryTypeVirtual64;
- iomdOptions |= kIOMemoryTypePhysical64;
-
- address = IOMallocPhysical(capacity, physicalMask);
- _buffer = (void *) address;
- if (!_buffer)
- return false;
-
- mapTask = inTask;
- inTask = 0;
+ _internalFlags |= kInternalFlagPhysical;
+ if (highestMask)
+ {
+ _internalFlags |= kInternalFlagPageSized;
+ capacity = round_page(capacity);
+ }
+ _buffer = (void *) IOKernelAllocateWithPhysicalRestrict(capacity, highestMask, alignment,
+ (0 != (options & kIOMemoryPhysicallyContiguous)));
+ }
+ else if (alignment > 1)
+ {
+ _buffer = IOMallocAligned(capacity, alignment);
}
else
{
- vmmap = kernel_map;
-
- // Buffer shouldn't auto prepare they should be prepared explicitly
- // But it never was enforced so what are you going to do?
- iomdOptions |= kIOMemoryAutoPrepare;
-
- /* Allocate a wired-down buffer inside kernel space. */
- if (options & kIOMemoryPhysicallyContiguous)
- _buffer = (void *) IOKernelAllocateContiguous(capacity, alignment);
- else if (alignment > 1)
- _buffer = IOMallocAligned(capacity, alignment);
- else
- _buffer = IOMalloc(capacity);
- if (!_buffer)
- return false;
- }
- }
-
- if( (kIOMemoryTypePhysical64 != (kIOMemoryTypeMask & iomdOptions))
- && (options & (kIOMemoryPageable | kIOMapCacheMask))) {
+ _buffer = IOMalloc(capacity);
+ }
+
+ if (!_buffer)
+ {
+ return false;
+ }
+ }
+
+ if( (options & (kIOMemoryPageable | kIOMapCacheMask))) {
ipc_port_t sharedMem;
- vm_size_t size = round_page_32(capacity);
+ vm_size_t size = round_page(capacity);
kr = mach_make_memory_entry(vmmap,
&size, (vm_offset_t)_buffer,
memEntryCacheMode, &sharedMem,
NULL );
- if( (KERN_SUCCESS == kr) && (size != round_page_32(capacity))) {
+ if( (KERN_SUCCESS == kr) && (size != round_page(capacity))) {
ipc_port_release_send( sharedMem );
kr = kIOReturnVMError;
}
@@ -275,48 +249,12 @@
}
}
- range.address = (mach_vm_address_t) _buffer;
- range.length = capacity;
-
- if (!super::initWithOptions(&range, 1, 0,
+ _ranges.v64->address = (mach_vm_address_t) _buffer;;
+ _ranges.v64->length = _capacity;
+
+ if (!super::initWithOptions(_ranges.v64, 1, 0,
inTask, iomdOptions, /* System mapper */ 0))
return false;
-
- if (physicalMask && !IOMapper::gSystem)
- {
- IOMDDMACharacteristics mdSummary;
-
- bzero(&mdSummary, sizeof(mdSummary));
- IOReturn rtn = dmaCommandOperation(
- kIOMDGetCharacteristics,
- &mdSummary, sizeof(mdSummary));
- if (rtn)
- return false;
-
- if (mdSummary.fHighestPage)
- {
- ppnum_t highest;
- while (mdSummary.fHighestPage > (highest = gIOHighestAllocatedPage))
- {
- if (OSCompareAndSwap(highest, mdSummary.fHighestPage,
- (UInt32 *) &gIOHighestAllocatedPage))
- break;
- }
- lastIOAddr = ptoa_64(mdSummary.fHighestPage);
- }
- else
- lastIOAddr = ptoa_64(gIOLastPage);
-
- if (lastIOAddr != (lastIOAddr & physicalMask))
- {
- if (kIOMemoryTypePhysical64 != (_flags & kIOMemoryTypeMask))
- {
- // flag a retry
- _physSegCount = 1;
- }
- return false;
- }
- }
if (mapTask)
{
@@ -325,20 +263,23 @@
if( !reserved)
return( false );
}
- reserved->map = map(mapTask, 0, kIOMapAnywhere, 0, 0);
+ reserved->map = createMappingInTask(mapTask, 0,
+ kIOMapAnywhere | (options & kIOMapCacheMask), 0, 0);
if (!reserved->map)
{
_buffer = 0;
return( false );
}
release(); // map took a retain on this
+ reserved->map->retain();
+ removeMapping(reserved->map);
mach_vm_address_t buffer = reserved->map->getAddress();
_buffer = (void *) buffer;
if (kIOMemoryTypeVirtual64 == (kIOMemoryTypeMask & iomdOptions))
_ranges.v64->address = buffer;
}
- setLength(capacity);
+ setLength(_capacity);
return true;
}
@@ -351,19 +292,9 @@
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithOptions(options, capacity, alignment, inTask)) {
- bool retry = me->_physSegCount;
+ if (me && !me->initWithPhysicalMask(inTask, options, capacity, alignment, 0)) {
me->release();
me = 0;
- if (retry)
- {
- me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithOptions(options, capacity, alignment, inTask))
- {
- me->release();
- me = 0;
- }
- }
}
return me;
}
@@ -378,36 +309,34 @@
if (me && !me->initWithPhysicalMask(inTask, options, capacity, 1, physicalMask))
{
- bool retry = me->_physSegCount;
me->release();
me = 0;
- if (retry)
- {
- me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithPhysicalMask(inTask, options, capacity, 1, physicalMask))
- {
- me->release();
- me = 0;
- }
- }
}
return me;
}
+#ifndef __LP64__
bool IOBufferMemoryDescriptor::initWithOptions(
IOOptionBits options,
vm_size_t capacity,
vm_offset_t alignment)
{
- return( initWithOptions(options, capacity, alignment, kernel_task) );
-}
+ return (initWithPhysicalMask(kernel_task, options, capacity, alignment, (mach_vm_address_t)0));
+}
+#endif /* !__LP64__ */
IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::withOptions(
IOOptionBits options,
vm_size_t capacity,
vm_offset_t alignment)
{
- return(IOBufferMemoryDescriptor::inTaskWithOptions(kernel_task, options, capacity, alignment));
+ IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
+
+ if (me && !me->initWithPhysicalMask(kernel_task, options, capacity, alignment, 0)) {
+ me->release();
+ me = 0;
+ }
+ return me;
}
@@ -428,6 +357,7 @@
inCapacity, inContiguous ? inCapacity : 1 ));
}
+#ifndef __LP64__
/*
* initWithBytes:
*
@@ -439,10 +369,9 @@
IODirection inDirection,
bool inContiguous)
{
- if (!initWithOptions(
- inDirection | kIOMemoryUnshared
- | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
- inLength, inLength ))
+ if (!initWithPhysicalMask(kernel_task, inDirection | kIOMemoryUnshared
+ | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
+ inLength, inLength, (mach_vm_address_t)0))
return false;
// start out with no data
@@ -453,6 +382,7 @@
return true;
}
+#endif /* !__LP64__ */
/*
* withBytes:
@@ -468,21 +398,25 @@
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithBytes(inBytes, inLength, inDirection, inContiguous))
- {
- bool retry = me->_physSegCount;
+ if (me && !me->initWithPhysicalMask(
+ kernel_task, inDirection | kIOMemoryUnshared
+ | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
+ inLength, inLength, 0 ))
+ {
me->release();
me = 0;
- if (retry)
+ }
+
+ if (me)
+ {
+ // start out with no data
+ me->setLength(0);
+
+ if (!me->appendBytes(inBytes, inLength))
{
- me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithBytes(inBytes, inLength, inDirection, inContiguous))
- {
- me->release();
- me = 0;
- }
- }
-
+ me->release();
+ me = 0;
+ }
}
return me;
}
@@ -496,13 +430,17 @@
{
// Cache all of the relevant information on the stack for use
// after we call super::free()!
- IOOptionBits flags = _flags;
+ IOOptionBits flags = _flags;
+ IOOptionBits internalFlags = _internalFlags;
IOOptionBits options = _options;
vm_size_t size = _capacity;
void * buffer = _buffer;
- IOVirtualAddress source = _ranges.v64->address;
IOMemoryMap * map = 0;
+ IOAddressRange * range = _ranges.v64;
vm_offset_t alignment = _alignment;
+
+ if (alignment >= page_size)
+ size = round_page(size);
if (reserved)
{
@@ -518,20 +456,24 @@
if (options & kIOMemoryPageable)
{
#if IOALLOCDEBUG
- debug_iomallocpageable_size -= round_page_32(size);
+ debug_iomallocpageable_size -= round_page(size);
#endif
}
else if (buffer)
{
- if (kIOMemoryTypePhysical64 == (flags & kIOMemoryTypeMask))
- IOFreePhysical((mach_vm_address_t) source, size);
- else if (options & kIOMemoryPhysicallyContiguous)
- IOKernelFreeContiguous((mach_vm_address_t) buffer, size);
+ if (internalFlags & kInternalFlagPhysical)
+ {
+ if (kInternalFlagPageSized & internalFlags)
+ size = round_page(size);
+ IOKernelFreePhysical((mach_vm_address_t) buffer, size);
+ }
else if (alignment > 1)
IOFreeAligned(buffer, size);
else
IOFree(buffer, size);
}
+ if (range && (kIOMemoryAsReference & flags))
+ IODelete(range, IOAddressRange, 1);
}
/*
@@ -571,7 +513,10 @@
*/
void IOBufferMemoryDescriptor::setDirection(IODirection direction)
{
- _direction = direction;
+ _flags = (_flags & ~kIOMemoryDirectionMask) | direction;
+#ifndef __LP64__
+ _direction = (IODirection) (_flags & kIOMemoryDirectionMask);
+#endif /* !__LP64__ */
}
/*
@@ -635,8 +580,9 @@
return 0;
}
-/* DEPRECATED */ void * IOBufferMemoryDescriptor::getVirtualSegment(IOByteCount offset,
-/* DEPRECATED */ IOByteCount * lengthOfSegment)
+#ifndef __LP64__
+void * IOBufferMemoryDescriptor::getVirtualSegment(IOByteCount offset,
+ IOByteCount * lengthOfSegment)
{
void * bytes = getBytesNoCopy(offset, 0);
@@ -645,9 +591,15 @@
return bytes;
}
-
+#endif /* !__LP64__ */
+
+#ifdef __LP64__
+OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 0);
+OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 1);
+#else /* !__LP64__ */
OSMetaClassDefineReservedUsed(IOBufferMemoryDescriptor, 0);
OSMetaClassDefineReservedUsed(IOBufferMemoryDescriptor, 1);
+#endif /* !__LP64__ */
OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 2);
OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 3);
OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 4);