#include <IOKit/IOMapper.h>
#include <IOKit/IOBufferMemoryDescriptor.h>
#include <libkern/OSDebug.h>
+#include <mach/mach_vm.h>
#include "IOKitKernelInternal.h"
+#ifdef IOALLOCDEBUG
+#include <libkern/c++/OSCPPDebug.h>
+#endif
+#include <IOKit/IOStatisticsPrivate.h>
+
+#if IOKITSTATS
+#define IOStatisticsAlloc(type, size) \
+do { \
+ IOStatistics::countAlloc(type, size); \
+} while (0)
+#else
+#define IOStatisticsAlloc(type, size)
+#endif /* IOKITSTATS */
+
+
__BEGIN_DECLS
void ipc_port_release_send(ipc_port_t port);
#include <vm/pmap.h>
enum
{
- kInternalFlagPhysical = 0x00000001,
- kInternalFlagPageSized = 0x00000002
+ kInternalFlagPhysical = 0x00000001,
+ kInternalFlagPageSized = 0x00000002,
+ kInternalFlagPageAllocated = 0x00000004
};
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+static uintptr_t IOBMDPageProc(iopa_t * a)
+{
+ kern_return_t kr;
+ vm_address_t vmaddr = 0;
+ int options = 0; // KMA_LOMEM;
+
+ kr = kernel_memory_allocate(kernel_map, &vmaddr,
+ page_size, 0, options);
+
+ if (KERN_SUCCESS != kr) vmaddr = 0;
+ else bzero((void *) vmaddr, page_size);
+
+ return ((uintptr_t) vmaddr);
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
#ifndef __LP64__
bool IOBufferMemoryDescriptor::initWithOptions(
IOOptionBits options,
mach_vm_address_t alignment,
mach_vm_address_t physicalMask)
{
- kern_return_t kr;
- task_t mapTask = NULL;
- vm_map_t vmmap = NULL;
- mach_vm_address_t highestMask = 0;
- IOOptionBits iomdOptions = kIOMemoryTypeVirtual64 | kIOMemoryAsReference;
+ kern_return_t kr;
+ task_t mapTask = NULL;
+ vm_map_t vmmap = NULL;
+ mach_vm_address_t highestMask = 0;
+ IOOptionBits iomdOptions = kIOMemoryTypeVirtual64 | kIOMemoryAsReference;
+ IODMAMapSpecification mapSpec;
+ bool mapped = false;
+ bool needZero;
if (!capacity)
return false;
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 0
- // workarounds-
- if ((options & kIOMemoryPhysicallyContiguous) || ((capacity == 0x1000) && (inTask == kernel_task))
- && !physicalMask)
+ if (!(kIOMemoryMapperNone & options))
{
- highestMask = physicalMask = 0xFFFFF000;
+ IOMapper::checkForSystemMapper();
+ mapped = (0 != IOMapper::gSystem);
}
- //-
-#endif
+ needZero = mapped;
if (physicalMask && (alignment <= 1))
{
if ((inTask != kernel_task) && !(options & kIOMemoryPageable))
return false;
+ bzero(&mapSpec, sizeof(mapSpec));
+ mapSpec.alignment = _alignment;
+ mapSpec.numAddressBits = 64;
+ if (highestMask && mapped)
+ {
+ if (highestMask <= 0xFFFFFFFF)
+ mapSpec.numAddressBits = (32 - __builtin_clz((unsigned int) highestMask));
+ else
+ mapSpec.numAddressBits = (64 - __builtin_clz((unsigned int) (highestMask >> 32)));
+ highestMask = 0;
+ }
+
// 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);
/* Allocate a wired-down buffer inside kernel space. */
- if ((options & kIOMemoryPhysicallyContiguous) || highestMask || (alignment > page_size))
+ bool contig = (0 != (options & kIOMemoryHostPhysicallyContiguous));
+
+ if (!contig && (0 != (options & kIOMemoryPhysicallyContiguous)))
+ {
+ contig |= (!mapped);
+ contig |= (0 != (kIOMemoryMapperNone & options));
+#if 0
+ // treat kIOMemoryPhysicallyContiguous as kIOMemoryHostPhysicallyContiguous for now
+ contig |= true;
+#endif
+ }
+
+ if (contig || highestMask || (alignment > page_size))
{
_internalFlags |= kInternalFlagPhysical;
if (highestMask)
_internalFlags |= kInternalFlagPageSized;
capacity = round_page(capacity);
}
- _buffer = (void *) IOKernelAllocateWithPhysicalRestrict(capacity, highestMask, alignment,
- (0 != (options & kIOMemoryPhysicallyContiguous)));
+ _buffer = (void *) IOKernelAllocateWithPhysicalRestrict(
+ capacity, highestMask, alignment, contig);
+ }
+ else if (needZero
+ && ((capacity + alignment) <= (page_size - kIOPageAllocChunkBytes)))
+ {
+ _internalFlags |= kInternalFlagPageAllocated;
+ needZero = false;
+ _buffer = (void *) iopa_alloc(&gIOBMDPageAllocator, &IOBMDPageProc, capacity, alignment);
+ if (_buffer)
+ {
+ IOStatisticsAlloc(kIOStatisticsMallocAligned, capacity);
+#if IOALLOCDEBUG
+ debug_iomalloc_size += capacity;
+#endif
+ }
}
else if (alignment > 1)
{
{
_buffer = IOMalloc(capacity);
}
-
if (!_buffer)
{
return false;
}
+ if (needZero) bzero(_buffer, capacity);
}
if( (options & (kIOMemoryPageable | kIOMapCacheMask))) {
while (startAddr < endAddr)
{
- *startAddr;
+ UInt8 dummyVar = *startAddr;
+ (void) dummyVar;
startAddr += page_size;
- }
+ }
}
}
inTask, iomdOptions, /* System mapper */ 0))
return false;
+ // give any system mapper the allocation params
+ if (kIOReturnSuccess != dmaCommandOperation(kIOMDAddDMAMapSpec,
+ &mapSpec, sizeof(mapSpec)))
+ return false;
+
if (mapTask)
{
if (!reserved) {
}
else if (buffer)
{
- if (internalFlags & kInternalFlagPhysical)
+ if (kInternalFlagPageSized & internalFlags) size = round_page(size);
+
+ if (kInternalFlagPhysical & internalFlags)
{
- if (kInternalFlagPageSized & internalFlags)
- size = round_page(size);
IOKernelFreePhysical((mach_vm_address_t) buffer, size);
- }
+ }
+ else if (kInternalFlagPageAllocated & internalFlags)
+ {
+ uintptr_t page;
+ page = iopa_free(&gIOBMDPageAllocator, (uintptr_t) buffer, size);
+ if (page)
+ {
+ kmem_free(kernel_map, page, page_size);
+ }
+#if IOALLOCDEBUG
+ debug_iomalloc_size -= size;
+#endif
+ IOStatisticsAlloc(kIOStatisticsFreeAligned, size);
+ }
else if (alignment > 1)
+ {
IOFreeAligned(buffer, size);
+ }
else
+ {
IOFree(buffer, size);
+ }
}
if (range && (kIOMemoryAsReference & flags))
IODelete(range, IOAddressRange, 1);
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