X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/1c79356b52d46aa6b508fb032f5ae709b1f2897b..bca245acd4c03fd752d1a45f011ad495e60fe53d:/iokit/Kernel/IOBufferMemoryDescriptor.cpp diff --git a/iokit/Kernel/IOBufferMemoryDescriptor.cpp b/iokit/Kernel/IOBufferMemoryDescriptor.cpp index c209c7035..29437390a 100644 --- a/iokit/Kernel/IOBufferMemoryDescriptor.cpp +++ b/iokit/Kernel/IOBufferMemoryDescriptor.cpp @@ -1,180 +1,492 @@ /* * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. - * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ + * + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. - * - * @APPLE_LICENSE_HEADER_END@ + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ + +#define _IOMEMORYDESCRIPTOR_INTERNAL_ + #include #include #include +#include #include +#include +#include + +#include "IOKitKernelInternal.h" + +#ifdef IOALLOCDEBUG +#include +#endif +#include + +#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 + __END_DECLS -extern "C" vm_map_t IOPageableMapForAddress( vm_address_t address ); +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +enum{ + kInternalFlagPhysical = 0x00000001, + kInternalFlagPageSized = 0x00000002, + kInternalFlagPageAllocated = 0x00000004, + kInternalFlagInit = 0x00000008 +}; + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ #define super IOGeneralMemoryDescriptor OSDefineMetaClassAndStructors(IOBufferMemoryDescriptor, - IOGeneralMemoryDescriptor); + IOGeneralMemoryDescriptor); + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +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, VM_KERN_MEMORY_IOKIT); + + if (KERN_SUCCESS != kr) { + vmaddr = 0; + } else { + bzero((void *) vmaddr, page_size); + } + + return (uintptr_t) vmaddr; +} + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +#ifndef __LP64__ +bool +IOBufferMemoryDescriptor::initWithOptions( + IOOptionBits options, + vm_size_t capacity, + vm_offset_t alignment, + task_t inTask) +{ + mach_vm_address_t physicalMask = 0; + return initWithPhysicalMask(inTask, options, capacity, alignment, physicalMask); +} +#endif /* !__LP64__ */ -bool IOBufferMemoryDescriptor::initWithAddress( - void * /* address */ , - IOByteCount /* withLength */ , - IODirection /* withDirection */ ) +IOBufferMemoryDescriptor * +IOBufferMemoryDescriptor::withCopy( + task_t inTask, + IOOptionBits options, + vm_map_t sourceMap, + mach_vm_address_t source, + mach_vm_size_t size) { - return false; + IOBufferMemoryDescriptor * inst; + kern_return_t err; + vm_map_copy_t copy; + vm_map_address_t address; + + copy = NULL; + do { + err = kIOReturnNoMemory; + inst = new IOBufferMemoryDescriptor; + if (!inst) { + break; + } + inst->_ranges.v64 = IONew(IOAddressRange, 1); + if (!inst->_ranges.v64) { + break; + } + + err = vm_map_copyin(sourceMap, source, size, + false /* src_destroy */, ©); + if (KERN_SUCCESS != err) { + break; + } + + err = vm_map_copyout(get_task_map(inTask), &address, copy); + if (KERN_SUCCESS != err) { + break; + } + copy = NULL; + + inst->_ranges.v64->address = address; + inst->_ranges.v64->length = size; + + if (!inst->initWithPhysicalMask(inTask, options, size, page_size, 0)) { + err = kIOReturnError; + } + } while (false); + + if (KERN_SUCCESS == err) { + return inst; + } + + if (copy) { + vm_map_copy_discard(copy); + } + OSSafeReleaseNULL(inst); + return NULL; } -bool IOBufferMemoryDescriptor::initWithAddress( - vm_address_t /* address */ , - IOByteCount /* withLength */ , - IODirection /* withDirection */ , - task_t /* withTask */ ) + +bool +IOBufferMemoryDescriptor::initWithPhysicalMask( + task_t inTask, + IOOptionBits options, + mach_vm_size_t capacity, + mach_vm_address_t alignment, + mach_vm_address_t physicalMask) { - return false; + 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 withCopy = false; + bool needZero; + + if (!capacity) { + return false; + } + + _options = options; + _capacity = capacity; + _internalFlags = 0; + _internalReserved = 0; + _buffer = NULL; + + if (!_ranges.v64) { + _ranges.v64 = IONew(IOAddressRange, 1); + if (!_ranges.v64) { + return false; + } + _ranges.v64->address = 0; + _ranges.v64->length = 0; + } else { + if (!_ranges.v64->address) { + return false; + } + if (!(kIOMemoryPageable & options)) { + return false; + } + if (!inTask) { + return false; + } + _buffer = (void *) _ranges.v64->address; + withCopy = true; + } + // 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 (!(kIOMemoryMapperNone & options)) { + IOMapper::checkForSystemMapper(); + mapped = (NULL != IOMapper::gSystem); + } + needZero = (mapped || (0 != (kIOMemorySharingTypeMask & options))); + + 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 = alignment; + + if ((capacity + alignment) < _capacity) { + return false; + } + + 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 memory entry cache mode, pageable, purgeable + iomdOptions |= ((options & kIOMapCacheMask) >> kIOMapCacheShift) << kIOMemoryBufferCacheShift; + if (options & kIOMemoryPageable) { + iomdOptions |= kIOMemoryBufferPageable; + if (options & kIOMemoryPurgeable) { + iomdOptions |= kIOMemoryBufferPurgeable; + } + } 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. */ + + 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, contig); + } else if (needZero + && ((capacity + alignment) <= (page_size - gIOPageAllocChunkBytes))) { + _internalFlags |= kInternalFlagPageAllocated; + needZero = false; + _buffer = (void *) iopa_alloc(&gIOBMDPageAllocator, &IOBMDPageProc, capacity, alignment); + if (_buffer) { + IOStatisticsAlloc(kIOStatisticsMallocAligned, capacity); +#if IOALLOCDEBUG + OSAddAtomic(capacity, &debug_iomalloc_size); +#endif + } + } else if (alignment > 1) { + _buffer = IOMallocAligned(capacity, alignment); + } else { + _buffer = IOMalloc(capacity); + } + if (!_buffer) { + return false; + } + if (needZero) { + bzero(_buffer, capacity); + } + } + + if ((options & (kIOMemoryPageable | kIOMapCacheMask))) { + vm_size_t size = round_page(capacity); + + // initWithOptions will create memory entry + if (!withCopy) { + iomdOptions |= kIOMemoryPersistent; + } + + if (options & kIOMemoryPageable) { +#if IOALLOCDEBUG + OSAddAtomicLong(size, &debug_iomallocpageable_size); +#endif + if (!withCopy) { + mapTask = inTask; + } + if (NULL == inTask) { + inTask = kernel_task; + } + } else if (options & kIOMapCacheMask) { + // Prefetch each page to put entries into the pmap + volatile UInt8 * startAddr = (UInt8 *)_buffer; + volatile UInt8 * endAddr = (UInt8 *)_buffer + capacity; + + while (startAddr < endAddr) { + UInt8 dummyVar = *startAddr; + (void) dummyVar; + startAddr += page_size; + } + } + } + + _ranges.v64->address = (mach_vm_address_t) _buffer; + _ranges.v64->length = _capacity; + + if (!super::initWithOptions(_ranges.v64, 1, 0, + inTask, iomdOptions, /* System mapper */ NULL)) { + return false; + } + + _internalFlags |= kInternalFlagInit; +#if IOTRACKING + if (!(options & kIOMemoryPageable)) { + trackingAccumSize(capacity); + } +#endif /* IOTRACKING */ + + // give any system mapper the allocation params + if (kIOReturnSuccess != dmaCommandOperation(kIOMDAddDMAMapSpec, + &mapSpec, sizeof(mapSpec))) { + return false; + } + + if (mapTask) { + if (!reserved) { + reserved = IONew( ExpansionData, 1 ); + if (!reserved) { + return false; + } + } + reserved->map = createMappingInTask(mapTask, 0, + kIOMapAnywhere | (options & kIOMapPrefault) | (options & kIOMapCacheMask), 0, 0); + if (!reserved->map) { + _buffer = NULL; + 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); + + return true; } -bool IOBufferMemoryDescriptor::initWithPhysicalAddress( - IOPhysicalAddress /* address */ , - IOByteCount /* withLength */ , - IODirection /* withDirection */ ) +IOBufferMemoryDescriptor * +IOBufferMemoryDescriptor::inTaskWithOptions( + task_t inTask, + IOOptionBits options, + vm_size_t capacity, + vm_offset_t alignment) { - return false; + IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; + + if (me && !me->initWithPhysicalMask(inTask, options, capacity, alignment, 0)) { + me->release(); + me = NULL; + } + return me; } -bool IOBufferMemoryDescriptor::initWithPhysicalRanges( - IOPhysicalRange * /* ranges */ , - UInt32 /* withCount */ , - IODirection /* withDirection */ , - bool /* asReference */ ) +IOBufferMemoryDescriptor * +IOBufferMemoryDescriptor::inTaskWithOptions( + task_t inTask, + IOOptionBits options, + vm_size_t capacity, + vm_offset_t alignment, + uint32_t kernTag, + uint32_t userTag) { - return false; + IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; + + if (me) { + me->setVMTags(kernTag, userTag); + + if (!me->initWithPhysicalMask(inTask, options, capacity, alignment, 0)) { + me->release(); + me = NULL; + } + } + return me; } -bool IOBufferMemoryDescriptor::initWithRanges( - IOVirtualRange * /* ranges */ , - UInt32 /* withCount */ , - IODirection /* withDirection */ , - task_t /* withTask */ , - bool /* asReference */ ) +IOBufferMemoryDescriptor * +IOBufferMemoryDescriptor::inTaskWithPhysicalMask( + task_t inTask, + IOOptionBits options, + mach_vm_size_t capacity, + mach_vm_address_t physicalMask) { - return false; + IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; + + if (me && !me->initWithPhysicalMask(inTask, options, capacity, 1, physicalMask)) { + me->release(); + me = NULL; + } + return me; } -bool IOBufferMemoryDescriptor::initWithOptions( - IOOptionBits options, - vm_size_t capacity, - vm_offset_t alignment) +#ifndef __LP64__ +bool +IOBufferMemoryDescriptor::initWithOptions( + IOOptionBits options, + vm_size_t capacity, + vm_offset_t alignment) { - if (!capacity) - return false; - - _options = options; - _capacity = capacity; - _physAddrs = 0; - _physSegCount = 0; - _buffer = 0; - - if ((options & kIOMemorySharingTypeMask) && (alignment < page_size)) - alignment = page_size; - - _alignment = alignment; - if (options & kIOMemoryPageable) - /* Allocate some kernel address space. */ - _buffer = IOMallocPageable(capacity, alignment); - /* Allocate a wired-down buffer inside kernel space. */ - else if (options & kIOMemoryPhysicallyContiguous) - _buffer = IOMallocContiguous(capacity, alignment, 0); - 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; - - if (!super::initWithRanges(&_singleRange.v, 1, - (IODirection) (options & kIOMemoryDirectionMask), - kernel_task, true)) - return false; - - if (options & kIOMemoryPageable) { - _flags |= kIOMemoryRequiresWire; - - kern_return_t kr; - ipc_port_t sharedMem = (ipc_port_t) _memEntry; - vm_size_t size = _ranges.v[0].length; - - // must create the entry before any pages are allocated - if( 0 == sharedMem) { - kr = mach_make_memory_entry( IOPageableMapForAddress( _ranges.v[0].address ), - &size, _ranges.v[0].address, - VM_PROT_READ | VM_PROT_WRITE, &sharedMem, - NULL ); - if( (KERN_SUCCESS == kr) && (size != _ranges.v[0].length)) { - ipc_port_release_send( sharedMem ); - kr = kIOReturnVMError; - } - if( KERN_SUCCESS != kr) - sharedMem = 0; - _memEntry = (void *) sharedMem; - } - - } else { - /* Precompute virtual-to-physical page mappings. */ - vm_address_t inBuffer = (vm_address_t) _buffer; - _physSegCount = atop(trunc_page(inBuffer + capacity - 1) - - trunc_page(inBuffer)) + 1; - _physAddrs = IONew(IOPhysicalAddress, _physSegCount); - if (!_physAddrs) - return false; - - inBuffer = trunc_page(inBuffer); - for (unsigned i = 0; i < _physSegCount; i++) { - _physAddrs[i] = pmap_extract(get_task_pmap(kernel_task), inBuffer); - assert(_physAddrs[i]); /* supposed to be wired */ - inBuffer += page_size; - } - } - - setLength(capacity); - - return true; + 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 = 1) +IOBufferMemoryDescriptor * +IOBufferMemoryDescriptor::withOptions( + IOOptionBits options, + vm_size_t capacity, + vm_offset_t alignment) { - IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; - - if (me && !me->initWithOptions(options, capacity, alignment)) { - me->release(); - me = 0; - } - return me; + IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; + + if (me && !me->initWithPhysicalMask(kernel_task, options, capacity, alignment, 0)) { + me->release(); + me = NULL; + } + return me; } @@ -186,40 +498,44 @@ IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::withOptions( */ IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::withCapacity(vm_size_t inCapacity, - IODirection inDirection, - bool inContiguous) + IODirection inDirection, + bool inContiguous) { - return( IOBufferMemoryDescriptor::withOptions( - inDirection | kIOMemoryUnshared - | (inContiguous ? kIOMemoryPhysicallyContiguous : 0), - inCapacity, inContiguous ? inCapacity : 1 )); + return IOBufferMemoryDescriptor::withOptions( + inDirection | kIOMemoryUnshared + | (inContiguous ? kIOMemoryPhysicallyContiguous : 0), + inCapacity, inContiguous ? inCapacity : 1 ); } +#ifndef __LP64__ /* * initWithBytes: * * Initialize a new IOBufferMemoryDescriptor preloaded with bytes (copied). * The descriptor's length and capacity are set to the input buffer's size. */ -bool IOBufferMemoryDescriptor::initWithBytes(const void * inBytes, - vm_size_t inLength, - IODirection inDirection, - bool inContiguous) +bool +IOBufferMemoryDescriptor::initWithBytes(const void * inBytes, + vm_size_t inLength, + IODirection inDirection, + bool inContiguous) { - if (!initWithOptions( - inDirection | kIOMemoryUnshared - | (inContiguous ? kIOMemoryPhysicallyContiguous : 0), - inLength, inLength )) - return false; + if (!initWithPhysicalMask(kernel_task, inDirection | kIOMemoryUnshared + | (inContiguous ? kIOMemoryPhysicallyContiguous : 0), + inLength, inLength, (mach_vm_address_t)0)) { + return false; + } - // start out with no data - setLength(0); + // start out with no data + setLength(0); - if (!appendBytes(inBytes, inLength)) - return false; + if (!appendBytes(inBytes, inLength)) { + return false; + } - return true; + return true; } +#endif /* !__LP64__ */ /* * withBytes: @@ -229,17 +545,30 @@ bool IOBufferMemoryDescriptor::initWithBytes(const void * inBytes, */ IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::withBytes(const void * inBytes, - vm_size_t inLength, - IODirection inDirection, - bool inContiguous) + vm_size_t inLength, + IODirection inDirection, + bool inContiguous) { - IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; - - if (me && !me->initWithBytes(inBytes, inLength, inDirection, inContiguous)){ - me->release(); - me = 0; - } - return me; + IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; + + if (me && !me->initWithPhysicalMask( + kernel_task, inDirection | kIOMemoryUnshared + | (inContiguous ? kIOMemoryPhysicallyContiguous : 0), + inLength, inLength, 0 )) { + me->release(); + me = NULL; + } + + if (me) { + // start out with no data + me->setLength(0); + + if (!me->appendBytes(inBytes, inLength)) { + me->release(); + me = NULL; + } + } + return me; } /* @@ -247,31 +576,74 @@ IOBufferMemoryDescriptor::withBytes(const void * inBytes, * * Free resources */ -void IOBufferMemoryDescriptor::free() +void +IOBufferMemoryDescriptor::free() { - IOOptionBits options = _options; - vm_size_t size = _capacity; - void * buffer = _buffer; - vm_offset_t alignment = _alignment; - - if (_physAddrs) - IODelete(_physAddrs, IOPhysicalAddress, _physSegCount); - - /* super::free may unwire - deallocate buffer afterwards */ - super::free(); - - if (buffer) { - if (options & kIOMemoryPageable) - IOFreePageable(buffer, size); - else { - if (options & kIOMemoryPhysicallyContiguous) - IOFreeContiguous(buffer, size); - else if (alignment > 1) - IOFreeAligned(buffer, size); - else - IOFree(buffer, size); - } - } + // Cache all of the relevant information on the stack for use + // after we call super::free()! + IOOptionBits flags = _flags; + IOOptionBits internalFlags = _internalFlags; + IOOptionBits options = _options; + vm_size_t size = _capacity; + void * buffer = _buffer; + IOMemoryMap * map = NULL; + IOAddressRange * range = _ranges.v64; + vm_offset_t alignment = _alignment; + + if (alignment >= page_size) { + size = round_page(size); + } + + if (reserved) { + map = reserved->map; + IODelete( reserved, ExpansionData, 1 ); + if (map) { + map->release(); + } + } + + if ((options & kIOMemoryPageable) + || (kInternalFlagPageSized & internalFlags)) { + size = round_page(size); + } + +#if IOTRACKING + if (!(options & kIOMemoryPageable) + && buffer + && (kInternalFlagInit & _internalFlags)) { + trackingAccumSize(-size); + } +#endif /* IOTRACKING */ + + /* super::free may unwire - deallocate buffer afterwards */ + super::free(); + + if (options & kIOMemoryPageable) { +#if IOALLOCDEBUG + OSAddAtomicLong(-size, &debug_iomallocpageable_size); +#endif + } else if (buffer) { + if (kInternalFlagPhysical & internalFlags) { + 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 + OSAddAtomic(-size, &debug_iomalloc_size); +#endif + IOStatisticsAlloc(kIOStatisticsFreeAligned, size); + } else if (alignment > 1) { + IOFreeAligned(buffer, size); + } else { + IOFree(buffer, size); + } + } + if (range && (kIOMemoryAsReference & flags)) { + IODelete(range, IOAddressRange, 1); + } } /* @@ -279,9 +651,10 @@ void IOBufferMemoryDescriptor::free() * * Get the buffer capacity */ -vm_size_t IOBufferMemoryDescriptor::getCapacity() const +vm_size_t +IOBufferMemoryDescriptor::getCapacity() const { - return _capacity; + return _capacity; } /* @@ -294,12 +667,16 @@ vm_size_t IOBufferMemoryDescriptor::getCapacity() const * can reuse an existing one, even for different transfer sizes). Note * that the specified length must not exceed the capacity of the buffer. */ -void IOBufferMemoryDescriptor::setLength(vm_size_t length) +void +IOBufferMemoryDescriptor::setLength(vm_size_t length) { - assert(length <= _capacity); + assert(length <= _capacity); + if (length > _capacity) { + return; + } - _length = length; - _singleRange.v.length = length; + _length = length; + _ranges.v64->length = length; } /* @@ -309,9 +686,13 @@ void IOBufferMemoryDescriptor::setLength(vm_size_t length) * the descriptor's transfer direction. This eliminates the need to destroy * and create new buffers when different transfer directions are needed. */ -void IOBufferMemoryDescriptor::setDirection(IODirection direction) +void +IOBufferMemoryDescriptor::setDirection(IODirection direction) { - _direction = direction; + _flags = (_flags & ~kIOMemoryDirectionMask) | direction; +#ifndef __LP64__ + _direction = (IODirection) (_flags & kIOMemoryDirectionMask); +#endif /* !__LP64__ */ } /* @@ -324,15 +705,23 @@ void IOBufferMemoryDescriptor::setDirection(IODirection direction) bool IOBufferMemoryDescriptor::appendBytes(const void * bytes, vm_size_t withLength) { - vm_size_t actualBytesToCopy = min(withLength, _capacity - _length); + vm_size_t actualBytesToCopy = min(withLength, _capacity - _length); + IOByteCount offset; + + assert(_length <= _capacity); - assert(_length <= _capacity); - bcopy(/* from */ bytes, (void *)(_singleRange.v.address + _length), - actualBytesToCopy); - _length += actualBytesToCopy; - _singleRange.v.length += actualBytesToCopy; + offset = _length; + _length += actualBytesToCopy; + _ranges.v64->length += actualBytesToCopy; - return true; + if (_task == kernel_task) { + bcopy(/* from */ bytes, (void *)(_ranges.v64->address + offset), + actualBytesToCopy); + } else { + writeBytes(offset, bytes, actualBytesToCopy); + } + + return true; } /* @@ -340,11 +729,17 @@ IOBufferMemoryDescriptor::appendBytes(const void * bytes, vm_size_t withLength) * * Return the virtual address of the beginning of the buffer */ -void * IOBufferMemoryDescriptor::getBytesNoCopy() +void * +IOBufferMemoryDescriptor::getBytesNoCopy() { - return (void *)_singleRange.v.address; + if (kIOMemoryTypePhysical64 == (_flags & kIOMemoryTypeMask)) { + return _buffer; + } else { + return (void *)_ranges.v64->address; + } } + /* * getBytesNoCopy: * @@ -353,62 +748,46 @@ void * IOBufferMemoryDescriptor::getBytesNoCopy() void * IOBufferMemoryDescriptor::getBytesNoCopy(vm_size_t start, vm_size_t withLength) { - if (start < _length && (start + withLength) <= _length) - return (void *)(_singleRange.v.address + start); - return 0; + IOVirtualAddress address; + + if ((start + withLength) < start) { + return NULL; + } + + if (kIOMemoryTypePhysical64 == (_flags & kIOMemoryTypeMask)) { + address = (IOVirtualAddress) _buffer; + } else { + address = _ranges.v64->address; + } + + if (start < _length && (start + withLength) <= _length) { + return (void *)(address + start); + } + return NULL; } -/* - * getPhysicalSegment: - * - * Get the physical address of the buffer, relative to the current position. - * If the current position is at the end of the buffer, a zero is returned. - */ -IOPhysicalAddress -IOBufferMemoryDescriptor::getPhysicalSegment(IOByteCount offset, - IOByteCount * lengthOfSegment) +#ifndef __LP64__ +void * +IOBufferMemoryDescriptor::getVirtualSegment(IOByteCount offset, + IOByteCount * lengthOfSegment) { - IOPhysicalAddress physAddr; - - if( offset != _position) - setPosition( offset ); - - assert(_position <= _length); - - /* Fail gracefully if the position is at (or past) the end-of-buffer. */ - if (_position >= _length) { - *lengthOfSegment = 0; - return 0; - } - - if (_options & kIOMemoryPageable) { - physAddr = super::getPhysicalSegment(offset, lengthOfSegment); - - } else { - /* Compute the largest contiguous physical length possible. */ - vm_address_t actualPos = _singleRange.v.address + _position; - vm_address_t actualPage = trunc_page(actualPos); - unsigned physInd = atop(actualPage-trunc_page(_singleRange.v.address)); - - vm_size_t physicalLength = actualPage + page_size - actualPos; - for (unsigned index = physInd + 1; index < _physSegCount && - _physAddrs[index] == _physAddrs[index-1] + page_size; index++) { - physicalLength += page_size; - } - - /* Clip contiguous physical length at the end-of-buffer. */ - if (physicalLength > _length - _position) - physicalLength = _length - _position; - - *lengthOfSegment = physicalLength; - physAddr = _physAddrs[physInd] + (actualPos - actualPage); - } - - return physAddr; + void * bytes = getBytesNoCopy(offset, 0); + + if (bytes && lengthOfSegment) { + *lengthOfSegment = _length - offset; + } + + 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);