*
* @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
+};
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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,
mach_vm_address_t physicalMask = 0;
return (initWithPhysicalMask(inTask, options, capacity, alignment, physicalMask));
}
+#endif /* !__LP64__ */
bool IOBufferMemoryDescriptor::initWithPhysicalMask(
task_t inTask,
mach_vm_address_t physicalMask)
{
kern_return_t kr;
- addr64_t lastIOAddr;
- vm_map_t vmmap = 0;
- IOOptionBits iomdOptions = kIOMemoryAsReference | kIOMemoryTypeVirtual;
+ task_t mapTask = NULL;
+ vm_map_t vmmap = NULL;
+ mach_vm_address_t highestMask = 0;
+ IOOptionBits iomdOptions = kIOMemoryTypeVirtual64 | kIOMemoryAsReference;
if (!capacity)
return false;
- _options = options;
- _capacity = capacity;
- _physAddrs = 0;
- _physSegCount = 0;
- _buffer = 0;
+ _options = options;
+ _capacity = capacity;
+ _internalFlags = 0;
+ _internalReserved = 0;
+ _buffer = 0;
- // Grab the direction and the Auto Prepare bits from the Buffer MD options
- iomdOptions |= options & (kIOMemoryDirectionMask | kIOMemoryAutoPrepare);
+ _ranges.v64 = IONew(IOAddressRange, 1);
+ if (!_ranges.v64)
+ return (false);
+ _ranges.v64->address = 0;
+ _ranges.v64->length = 0;
- if ((options & kIOMemorySharingTypeMask) && (alignment < page_size))
- alignment = page_size;
-
- if ((inTask != kernel_task) && !(options & kIOMemoryPageable))
- return false;
+ // Grab IOMD bits from the Buffer MD options
+ iomdOptions |= (options & kIOBufferDescriptorMemoryFlags);
if (physicalMask && (alignment <= 1))
- alignment = ((physicalMask ^ PAGE_MASK) & PAGE_MASK) + 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 ((options & kIOMemoryPhysicallyContiguous) && !physicalMask)
- physicalMask = 0xFFFFFFFF;
+ if (alignment >= page_size)
+ capacity = round_page(capacity);
+
+ if (alignment > page_size)
+ options |= kIOMemoryPhysicallyContiguous;
_alignment = alignment;
- if (options & kIOMemoryPageable)
+
+ if ((inTask != kernel_task) && !(options & kIOMemoryPageable))
+ return false;
+
+ // set flags for entry + object create
+ vm_prot_t memEntryCacheMode = VM_PROT_READ | VM_PROT_WRITE;
+
+ // set memory entry cache mode
+ switch (options & kIOMapCacheMask)
{
- iomdOptions |= kIOMemoryBufferPageable;
+ 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;
+ }
- ipc_port_t sharedMem;
- vm_size_t size = round_page_32(capacity);
+ if (options & kIOMemoryPageable)
+ {
+ iomdOptions |= kIOMemoryBufferPageable;
- // must create the entry before any pages are allocated
+ // must create the entry before any pages are allocated
// set flags for entry + object create
- vm_prot_t memEntryCacheMode = VM_PROT_READ | VM_PROT_WRITE
- | MAP_MEM_NAMED_CREATE;
+ memEntryCacheMode |= MAP_MEM_NAMED_CREATE;
- if (options & kIOMemoryPurgeable)
- memEntryCacheMode |= MAP_MEM_PURGABLE;
+ if (options & kIOMemoryPurgeable)
+ memEntryCacheMode |= MAP_MEM_PURGABLE;
+ }
+ else
+ {
+ memEntryCacheMode |= MAP_MEM_NAMED_REUSE;
+ vmmap = kernel_map;
- // set memory entry cache mode
- switch (options & kIOMapCacheMask)
+ // 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))
{
- 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;
+ _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
+ {
+ _buffer = IOMalloc(capacity);
}
- kr = mach_make_memory_entry( vmmap,
- &size, 0,
- memEntryCacheMode, &sharedMem,
- NULL );
+ if (!_buffer)
+ {
+ return false;
+ }
+ }
- if( (KERN_SUCCESS == kr) && (size != round_page_32(capacity))) {
+ if( (options & (kIOMemoryPageable | kIOMapCacheMask))) {
+ ipc_port_t sharedMem;
+ 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(capacity))) {
ipc_port_release_send( sharedMem );
kr = kIOReturnVMError;
}
return( false );
_memEntry = (void *) sharedMem;
+
+ if( options & kIOMemoryPageable) {
#if IOALLOCDEBUG
- debug_iomallocpageable_size += size;
+ debug_iomallocpageable_size += size;
#endif
- if (NULL == inTask)
- inTask = kernel_task;
- else if (inTask == kernel_task)
- {
- vmmap = kernel_map;
+ mapTask = inTask;
+ if (NULL == inTask)
+ inTask = kernel_task;
}
- else
+ else if (options & kIOMapCacheMask)
{
- if( !reserved) {
- reserved = IONew( ExpansionData, 1 );
- if( !reserved)
- return( false );
- }
- vmmap = get_task_map(inTask);
- vm_map_reference(vmmap);
- reserved->map = vmmap;
- }
- }
- else
- {
- if (IOMapper::gSystem)
- // assuming mapped space is 2G
- lastIOAddr = (1UL << 31) - PAGE_SIZE;
- else
- lastIOAddr = ptoa_64(gIOHighestAllocatedPage);
-
- if (physicalMask && (lastIOAddr != (lastIOAddr & physicalMask)))
- {
- mach_vm_address_t address;
- iomdOptions &= ~kIOMemoryTypeVirtual;
- iomdOptions |= kIOMemoryTypePhysical;
-
- address = IOMallocPhysical(capacity, physicalMask);
- _buffer = (void *) address;
- if (!_buffer)
- return false;
+ // Prefetch each page to put entries into the pmap
+ volatile UInt8 * startAddr = (UInt8 *)_buffer;
+ volatile UInt8 * endAddr = (UInt8 *)_buffer + capacity;
- if (inTask == kernel_task)
+ while (startAddr < endAddr)
{
- vmmap = kernel_map;
+ *startAddr;
+ startAddr += page_size;
}
- else if (NULL != inTask)
- {
- if( !reserved) {
- reserved = IONew( ExpansionData, 1 );
- if( !reserved)
- return( false );
- }
- vmmap = get_task_map(inTask);
- vm_map_reference(vmmap);
- reserved->map = vmmap;
- }
- inTask = 0;
- }
- else
- {
- // 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;
}
}
- _singleRange.v.address = (vm_address_t) _buffer;
- _singleRange.v.length = capacity;
+ _ranges.v64->address = (mach_vm_address_t) _buffer;;
+ _ranges.v64->length = _capacity;
- if (!super::initWithOptions(&_singleRange.v, 1, 0,
- inTask, iomdOptions, /* System mapper */ 0))
+ if (!super::initWithOptions(_ranges.v64, 1, 0,
+ inTask, iomdOptions, /* System mapper */ 0))
return false;
- if (physicalMask && !IOMapper::gSystem)
+ if (mapTask)
{
- 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);
+ if (!reserved) {
+ reserved = IONew( ExpansionData, 1 );
+ if( !reserved)
+ return( false );
}
- else
- lastIOAddr = ptoa_64(gIOLastPage);
-
- if (lastIOAddr != (lastIOAddr & physicalMask))
- {
- if (kIOMemoryTypePhysical != (_flags & kIOMemoryTypeMask))
- {
- // flag a retry
- _physSegCount = 1;
- }
- return false;
- }
- }
-
- if (vmmap)
- {
- kr = doMap(vmmap, (IOVirtualAddress *) &_buffer, kIOMapAnywhere, 0, capacity);
- if (KERN_SUCCESS != kr)
+ reserved->map = createMappingInTask(mapTask, 0,
+ kIOMapAnywhere | (options & kIOMapCacheMask), 0, 0);
+ if (!reserved->map)
{
_buffer = 0;
return( false );
}
-
- if (kIOMemoryTypeVirtual & iomdOptions)
- _singleRange.v.address = (vm_address_t) _buffer;
+ 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;
}
{
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;
}
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;
}
inCapacity, inContiguous ? inCapacity : 1 ));
}
+#ifndef __LP64__
/*
* initWithBytes:
*
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
return true;
}
+#endif /* !__LP64__ */
/*
* withBytes:
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithBytes(inBytes, inLength, inDirection, inContiguous))
+ if (me && !me->initWithPhysicalMask(
+ kernel_task, inDirection | kIOMemoryUnshared
+ | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
+ inLength, inLength, 0 ))
{
- bool retry = me->_physSegCount;
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;
}
{
// 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 = _singleRange.v.address;
- vm_map_t vmmap = 0;
+ IOMemoryMap * map = 0;
+ IOAddressRange * range = _ranges.v64;
vm_offset_t alignment = _alignment;
+ if (alignment >= page_size)
+ size = round_page(size);
+
if (reserved)
{
- vmmap = reserved->map;
+ map = reserved->map;
IODelete( reserved, ExpansionData, 1 );
+ if (map)
+ map->release();
}
/* super::free may unwire - deallocate buffer afterwards */
if (options & kIOMemoryPageable)
{
#if IOALLOCDEBUG
- if (!buffer || vmmap)
- debug_iomallocpageable_size -= round_page_32(size);
+ debug_iomallocpageable_size -= round_page(size);
#endif
- if (buffer)
- {
- if (vmmap)
- vm_deallocate(vmmap, (vm_address_t) buffer, round_page_32(size));
- else
- IOFreePageable(buffer, size);
- }
}
else if (buffer)
{
- if (kIOMemoryTypePhysical == (flags & kIOMemoryTypeMask))
- {
- if (vmmap)
- vm_deallocate(vmmap, (vm_address_t) buffer, round_page_32(size));
- 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 (vmmap)
- vm_map_deallocate(vmmap);
+ if (range && (kIOMemoryAsReference & flags))
+ IODelete(range, IOAddressRange, 1);
}
/*
assert(length <= _capacity);
_length = length;
- _singleRange.v.length = length;
+ _ranges.v64->length = length;
}
/*
*/
void IOBufferMemoryDescriptor::setDirection(IODirection direction)
{
- _direction = direction;
+ _flags = (_flags & ~kIOMemoryDirectionMask) | direction;
+#ifndef __LP64__
+ _direction = (IODirection) (_flags & kIOMemoryDirectionMask);
+#endif /* !__LP64__ */
}
/*
offset = _length;
_length += actualBytesToCopy;
- _singleRange.v.length += actualBytesToCopy;
+ _ranges.v64->length += actualBytesToCopy;
if (_task == kernel_task)
- bcopy(/* from */ bytes, (void *)(_singleRange.v.address + offset),
+ bcopy(/* from */ bytes, (void *)(_ranges.v64->address + offset),
actualBytesToCopy);
else
writeBytes(offset, bytes, actualBytesToCopy);
*/
void * IOBufferMemoryDescriptor::getBytesNoCopy()
{
- if (kIOMemoryTypePhysical == (_flags & kIOMemoryTypeMask))
+ if (kIOMemoryTypePhysical64 == (_flags & kIOMemoryTypeMask))
return _buffer;
else
- return (void *)_singleRange.v.address;
+ return (void *)_ranges.v64->address;
}
IOBufferMemoryDescriptor::getBytesNoCopy(vm_size_t start, vm_size_t withLength)
{
IOVirtualAddress address;
- if (kIOMemoryTypePhysical == (_flags & kIOMemoryTypeMask))
+ if (kIOMemoryTypePhysical64 == (_flags & kIOMemoryTypeMask))
address = (IOVirtualAddress) _buffer;
else
- address = _singleRange.v.address;
+ address = _ranges.v64->address;
if (start < _length && (start + withLength) <= _length)
return (void *)(address + start);
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);
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);
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