#include <libkern/OSDebug.h>
#include "IOKitKernelInternal.h"
-#include "IOCopyMapper.h"
__BEGIN_DECLS
void ipc_port_release_send(ipc_port_t port);
enum
{
- kInternalFlagRealloc = 0x00000001,
+ kInternalFlagPhysical = 0x00000001,
+ kInternalFlagPageSized = 0x00000002
};
-volatile ppnum_t gIOHighestAllocatedPage;
-
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#define super IOGeneralMemoryDescriptor
kern_return_t kr;
task_t mapTask = NULL;
vm_map_t vmmap = NULL;
- addr64_t lastIOAddr;
mach_vm_address_t highestMask = 0;
- bool usePhys;
IOOptionBits iomdOptions = kIOMemoryTypeVirtual64 | kIOMemoryAsReference;
if (!capacity)
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);
alignment = ((physicalMask ^ (-1ULL)) & (physicalMask - 1));
highestMask = (physicalMask | alignment);
alignment++;
+ if (alignment < page_size)
+ alignment = page_size;
}
- if ((options & (kIOMemorySharingTypeMask | kIOMapCacheMask)) && (alignment < page_size))
+ if ((options & (kIOMemorySharingTypeMask | kIOMapCacheMask | kIOMemoryClearEncrypt)) && (alignment < page_size))
alignment = page_size;
if (alignment >= page_size)
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;
SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode);
break;
+ case kIOMapCopybackInnerCache:
+ SET_MAP_MEM(MAP_MEM_INNERWBACK, memEntryCacheMode);
+ break;
+
case kIOMapDefaultCache:
default:
SET_MAP_MEM(MAP_MEM_NOOP, memEntryCacheMode);
else
{
memEntryCacheMode |= MAP_MEM_NAMED_REUSE;
+ vmmap = kernel_map;
- if (IOMapper::gSystem)
- // assuming mapped space is 2G
- lastIOAddr = (1UL << 31) - PAGE_SIZE;
- else
- lastIOAddr = ptoa_64(gIOHighestAllocatedPage);
+ // Buffer shouldn't auto prepare they should be prepared explicitly
+ // But it never was enforced so what are you going to do?
+ iomdOptions |= kIOMemoryAutoPrepare;
- usePhys = (highestMask && (lastIOAddr != (lastIOAddr & highestMask))
- && (alignment <= page_size));
+ /* Allocate a wired-down buffer inside kernel space. */
- if (!usePhys && (options & kIOMemoryPhysicallyContiguous))
+ if ((options & kIOMemoryPhysicallyContiguous) || highestMask || (alignment > page_size))
{
- _buffer = (void *) IOKernelAllocateContiguous(capacity, highestMask, alignment);
- usePhys = (NULL == _buffer);
+ _internalFlags |= kInternalFlagPhysical;
+ if (highestMask)
+ {
+ _internalFlags |= kInternalFlagPageSized;
+ capacity = round_page(capacity);
+ }
+ _buffer = (void *) IOKernelAllocateWithPhysicalRestrict(capacity, highestMask, alignment,
+ (0 != (options & kIOMemoryPhysicallyContiguous)));
}
- if (usePhys)
+ else if (alignment > 1)
{
- mach_vm_address_t address;
- iomdOptions &= ~kIOMemoryTypeVirtual64;
- iomdOptions |= kIOMemoryTypePhysical64;
-
- address = IOMallocPhysical(capacity, highestMask);
- _buffer = (void *) address;
- if (!_buffer)
- return false;
-
- mapTask = inTask;
- inTask = 0;
+ _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;
+ _buffer = IOMalloc(capacity);
+ }
- /* Allocate a wired-down buffer inside kernel space. */
- if (options & kIOMemoryPhysicallyContiguous)
- {
- // attempted allocate already
- }
- else if (alignment > 1)
- {
- _buffer = IOMallocAligned(capacity, alignment);
- }
- else
- {
- _buffer = IOMalloc(capacity);
- }
- if (!_buffer)
- return false;
+ if (!_buffer)
+ {
+ return false;
}
}
- if( (kIOMemoryTypePhysical64 != (kIOMemoryTypeMask & iomdOptions))
- && (options & (kIOMemoryPageable | kIOMapCacheMask))) {
+ if( (options & (kIOMemoryPageable | kIOMapCacheMask))) {
ipc_port_t sharedMem;
vm_size_t size = round_page(capacity);
inTask, iomdOptions, /* System mapper */ 0))
return false;
- if (highestMask && !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 & highestMask))
- {
- if (kIOMemoryTypePhysical64 != (_flags & kIOMemoryTypeMask))
- {
- // flag a retry
- _internalFlags |= kInternalFlagRealloc;
- }
- return false;
- }
- }
-
if (mapTask)
{
if (!reserved) {
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
if (me && !me->initWithPhysicalMask(inTask, options, capacity, alignment, 0)) {
- bool retry = (0 != (kInternalFlagRealloc & me->_internalFlags));
me->release();
me = 0;
- if (retry)
- {
- me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithPhysicalMask(inTask, options, capacity, alignment, 0))
- {
- me->release();
- me = 0;
- }
- }
}
return me;
}
if (me && !me->initWithPhysicalMask(inTask, options, capacity, 1, physicalMask))
{
- bool retry = (0 != (kInternalFlagRealloc & me->_internalFlags));
me->release();
me = 0;
- if (retry)
- {
- me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithPhysicalMask(inTask, options, capacity, 1, physicalMask))
- {
- me->release();
- me = 0;
- }
- }
}
return me;
}
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
if (me && !me->initWithPhysicalMask(kernel_task, options, capacity, alignment, 0)) {
- bool retry = (0 != (kInternalFlagRealloc & me->_internalFlags));
me->release();
me = 0;
- if (retry)
- {
- me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithPhysicalMask(kernel_task, options, capacity, alignment, 0))
- {
- me->release();
- me = 0;
- }
- }
}
return me;
}
| (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
inLength, inLength, 0 ))
{
- bool retry = (0 != (kInternalFlagRealloc & me->_internalFlags));
me->release();
me = 0;
- if (retry)
- {
- me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithPhysicalMask(
- kernel_task, inDirection | kIOMemoryUnshared
- | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
- inLength, inLength, 0 ))
- {
- me->release();
- me = 0;
- }
- }
-
}
if (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;
IOMemoryMap * map = 0;
IOAddressRange * range = _ranges.v64;
- mach_vm_address_t source = range ? range->address : 0;
vm_offset_t alignment = _alignment;
if (alignment >= page_size)
}
else if (buffer)
{
- if (kIOMemoryTypePhysical64 == (flags & kIOMemoryTypeMask))
- IOFreePhysical(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
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