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--- xnu/xnu-2050.9.2/iokit/Kernel/IOBufferMemoryDescriptor.cpp
+++ xnu/xnu-1228.15.4/iokit/Kernel/IOBufferMemoryDescriptor.cpp
@@ -25,9 +25,6 @@
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-
-#define _IOMEMORYDESCRIPTOR_INTERNAL_
-
#include <IOKit/assert.h>
#include <IOKit/system.h>
@@ -37,20 +34,18 @@
#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
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-enum
-{
- kInternalFlagPhysical = 0x00000001,
- kInternalFlagPageSized = 0x00000002
-};
+volatile ppnum_t gIOHighestAllocatedPage;
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -58,9 +53,50 @@
OSDefineMetaClassAndStructors(IOBufferMemoryDescriptor,
IOGeneralMemoryDescriptor);
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-#ifndef __LP64__
+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;
+}
+
bool IOBufferMemoryDescriptor::initWithOptions(
IOOptionBits options,
vm_size_t capacity,
@@ -70,7 +106,6 @@
mach_vm_address_t physicalMask = 0;
return (initWithPhysicalMask(inTask, options, capacity, alignment, physicalMask));
}
-#endif /* !__LP64__ */
bool IOBufferMemoryDescriptor::initWithPhysicalMask(
task_t inTask,
@@ -82,51 +117,39 @@
kern_return_t kr;
task_t mapTask = NULL;
vm_map_t vmmap = NULL;
- mach_vm_address_t highestMask = 0;
- IOOptionBits iomdOptions = kIOMemoryTypeVirtual64 | kIOMemoryAsReference;
+ addr64_t lastIOAddr;
+ IOAddressRange range;
+ IOOptionBits iomdOptions = kIOMemoryTypeVirtual64;
if (!capacity)
return false;
- _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;
+ _options = options;
+ _capacity = capacity;
+ _physAddrs = 0;
+ _physSegCount = 0;
+ _buffer = 0;
+ range.address = 0;
+ range.length = 0;
+ _ranges.v64 = ⦥
// Grab IOMD bits from the Buffer MD options
iomdOptions |= (options & kIOBufferDescriptorMemoryFlags);
+ if ((options & (kIOMemorySharingTypeMask | kIOMapCacheMask)) && (alignment < page_size))
+ alignment = page_size;
+
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 (alignment >= page_size)
- capacity = round_page(capacity);
-
- if (alignment > page_size)
- options |= kIOMemoryPhysicallyContiguous;
+ alignment = ((physicalMask ^ PAGE_MASK) & PAGE_MASK) + 1;
_alignment = alignment;
- if ((inTask != kernel_task) && !(options & kIOMemoryPageable))
+ if (((inTask != kernel_task) && !(options & kIOMemoryPageable)) ||
+ (physicalMask && (options & kIOMapCacheMask)))
return false;
+
+ if ((options & kIOMemoryPhysicallyContiguous) && !physicalMask)
+ physicalMask = 0xFFFFFFFF;
// set flags for entry + object create
vm_prot_t memEntryCacheMode = VM_PROT_READ | VM_PROT_WRITE;
@@ -148,10 +171,6 @@
case kIOMapCopybackCache:
SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode);
- break;
-
- case kIOMapCopybackInnerCache:
- SET_MAP_MEM(MAP_MEM_INNERWBACK, memEntryCacheMode);
break;
case kIOMapDefaultCache:
@@ -175,50 +194,58 @@
else
{
memEntryCacheMode |= MAP_MEM_NAMED_REUSE;
- 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))
- {
- _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);
- }
+
+ if (IOMapper::gSystem)
+ // assuming mapped space is 2G
+ lastIOAddr = (1UL << 31) - PAGE_SIZE;
else
- {
- _buffer = IOMalloc(capacity);
- }
-
- if (!_buffer)
- {
- return false;
- }
- }
-
- if( (options & (kIOMemoryPageable | kIOMapCacheMask))) {
+ lastIOAddr = ptoa_64(gIOHighestAllocatedPage);
+
+ if (physicalMask && (lastIOAddr != (lastIOAddr & physicalMask)))
+ {
+ mach_vm_address_t address;
+ iomdOptions &= ~kIOMemoryTypeVirtual64;
+ iomdOptions |= kIOMemoryTypePhysical64;
+
+ address = IOMallocPhysical(capacity, physicalMask);
+ _buffer = (void *) address;
+ if (!_buffer)
+ return false;
+
+ mapTask = inTask;
+ inTask = 0;
+ }
+ 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))) {
ipc_port_t sharedMem;
- vm_size_t size = round_page(capacity);
+ vm_size_t size = round_page_32(capacity);
kr = mach_make_memory_entry(vmmap,
&size, (vm_offset_t)_buffer,
memEntryCacheMode, &sharedMem,
NULL );
- if( (KERN_SUCCESS == kr) && (size != round_page(capacity))) {
+ if( (KERN_SUCCESS == kr) && (size != round_page_32(capacity))) {
ipc_port_release_send( sharedMem );
kr = kIOReturnVMError;
}
@@ -249,12 +276,48 @@
}
}
- _ranges.v64->address = (mach_vm_address_t) _buffer;;
- _ranges.v64->length = _capacity;
-
- if (!super::initWithOptions(_ranges.v64, 1, 0,
+ range.address = (mach_vm_address_t) _buffer;
+ range.length = capacity;
+
+ if (!super::initWithOptions(&range, 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)
{
@@ -263,23 +326,20 @@
if( !reserved)
return( false );
}
- reserved->map = createMappingInTask(mapTask, 0,
- kIOMapAnywhere | (options & kIOMapCacheMask), 0, 0);
+ reserved->map = map(mapTask, 0, kIOMapAnywhere, 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;
}
@@ -292,9 +352,19 @@
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithPhysicalMask(inTask, options, capacity, alignment, 0)) {
+ if (me && !me->initWithOptions(options, capacity, alignment, inTask)) {
+ bool retry = me->_physSegCount;
me->release();
me = 0;
+ if (retry)
+ {
+ me = new IOBufferMemoryDescriptor;
+ if (me && !me->initWithOptions(options, capacity, alignment, inTask))
+ {
+ me->release();
+ me = 0;
+ }
+ }
}
return me;
}
@@ -309,34 +379,36 @@
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 (initWithPhysicalMask(kernel_task, options, capacity, alignment, (mach_vm_address_t)0));
-}
-#endif /* !__LP64__ */
+ return( initWithOptions(options, capacity, alignment, kernel_task) );
+}
IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::withOptions(
IOOptionBits options,
vm_size_t capacity,
vm_offset_t alignment)
{
- IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
-
- if (me && !me->initWithPhysicalMask(kernel_task, options, capacity, alignment, 0)) {
- me->release();
- me = 0;
- }
- return me;
+ return(IOBufferMemoryDescriptor::inTaskWithOptions(kernel_task, options, capacity, alignment));
}
@@ -357,7 +429,6 @@
inCapacity, inContiguous ? inCapacity : 1 ));
}
-#ifndef __LP64__
/*
* initWithBytes:
*
@@ -369,9 +440,10 @@
IODirection inDirection,
bool inContiguous)
{
- if (!initWithPhysicalMask(kernel_task, inDirection | kIOMemoryUnshared
- | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
- inLength, inLength, (mach_vm_address_t)0))
+ if (!initWithOptions(
+ inDirection | kIOMemoryUnshared
+ | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
+ inLength, inLength ))
return false;
// start out with no data
@@ -382,7 +454,6 @@
return true;
}
-#endif /* !__LP64__ */
/*
* withBytes:
@@ -398,25 +469,21 @@
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithPhysicalMask(
- kernel_task, inDirection | kIOMemoryUnshared
- | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
- inLength, inLength, 0 ))
- {
+ if (me && !me->initWithBytes(inBytes, inLength, inDirection, inContiguous))
+ {
+ bool retry = me->_physSegCount;
me->release();
me = 0;
- }
-
- if (me)
- {
- // start out with no data
- me->setLength(0);
-
- if (!me->appendBytes(inBytes, inLength))
- {
- me->release();
- me = 0;
- }
+ if (retry)
+ {
+ me = new IOBufferMemoryDescriptor;
+ if (me && !me->initWithBytes(inBytes, inLength, inDirection, inContiguous))
+ {
+ me->release();
+ me = 0;
+ }
+ }
+
}
return me;
}
@@ -430,17 +497,13 @@
{
// Cache all of the relevant information on the stack for use
// after we call super::free()!
- IOOptionBits flags = _flags;
- IOOptionBits internalFlags = _internalFlags;
+ IOOptionBits flags = _flags;
IOOptionBits options = _options;
vm_size_t size = _capacity;
void * buffer = _buffer;
+ mach_vm_address_t source = (_ranges.v) ? _ranges.v64->address : 0;
IOMemoryMap * map = 0;
- IOAddressRange * range = _ranges.v64;
vm_offset_t alignment = _alignment;
-
- if (alignment >= page_size)
- size = round_page(size);
if (reserved)
{
@@ -456,24 +519,20 @@
if (options & kIOMemoryPageable)
{
#if IOALLOCDEBUG
- debug_iomallocpageable_size -= round_page(size);
+ debug_iomallocpageable_size -= round_page_32(size);
#endif
}
else if (buffer)
{
- if (internalFlags & kInternalFlagPhysical)
- {
- if (kInternalFlagPageSized & internalFlags)
- size = round_page(size);
- IOKernelFreePhysical((mach_vm_address_t) buffer, size);
- }
+ if (kIOMemoryTypePhysical64 == (flags & kIOMemoryTypeMask))
+ IOFreePhysical(source, size);
+ else if (options & kIOMemoryPhysicallyContiguous)
+ IOKernelFreeContiguous((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);
}
/*
@@ -513,10 +572,7 @@
*/
void IOBufferMemoryDescriptor::setDirection(IODirection direction)
{
- _flags = (_flags & ~kIOMemoryDirectionMask) | direction;
-#ifndef __LP64__
- _direction = (IODirection) (_flags & kIOMemoryDirectionMask);
-#endif /* !__LP64__ */
+ _direction = direction;
}
/*
@@ -580,9 +636,8 @@
return 0;
}
-#ifndef __LP64__
-void * IOBufferMemoryDescriptor::getVirtualSegment(IOByteCount offset,
- IOByteCount * lengthOfSegment)
+/* DEPRECATED */ void * IOBufferMemoryDescriptor::getVirtualSegment(IOByteCount offset,
+/* DEPRECATED */ IOByteCount * lengthOfSegment)
{
void * bytes = getBytesNoCopy(offset, 0);
@@ -591,15 +646,9 @@
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);