X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/8f6c56a50524aa785f7e596d52dddfb331e18961..bca245acd4c03fd752d1a45f011ad495e60fe53d:/iokit/Kernel/IOBufferMemoryDescriptor.cpp diff --git a/iokit/Kernel/IOBufferMemoryDescriptor.cpp b/iokit/Kernel/IOBufferMemoryDescriptor.cpp index 8b9dd38aa..29437390a 100644 --- a/iokit/Kernel/IOBufferMemoryDescriptor.cpp +++ b/iokit/Kernel/IOBufferMemoryDescriptor.cpp @@ -2,7 +2,7 @@ * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved. * * @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 @@ -11,10 +11,10 @@ * 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, @@ -22,259 +22,471 @@ * 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 -vm_map_t IOPageableMapForAddress( vm_address_t address ); __END_DECLS +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +enum{ + kInternalFlagPhysical = 0x00000001, + kInternalFlagPageSized = 0x00000002, + kInternalFlagPageAllocated = 0x00000004, + kInternalFlagInit = 0x00000008 +}; + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + #define super IOGeneralMemoryDescriptor OSDefineMetaClassAndStructors(IOBufferMemoryDescriptor, - IOGeneralMemoryDescriptor); + 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 */ ) +static uintptr_t +IOBMDPageProc(iopa_t * a) { - return false; -} + kern_return_t kr; + vm_address_t vmaddr = 0; + int options = 0;// KMA_LOMEM; -bool IOBufferMemoryDescriptor::initWithPhysicalAddress( - IOPhysicalAddress /* address */ , - IOByteCount /* withLength */ , - IODirection /* withDirection */ ) -{ - return false; + 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; } -bool IOBufferMemoryDescriptor::initWithPhysicalRanges( - IOPhysicalRange * /* ranges */ , - UInt32 /* withCount */ , - IODirection /* withDirection */ , - bool /* asReference */ ) +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +#ifndef __LP64__ +bool +IOBufferMemoryDescriptor::initWithOptions( + IOOptionBits options, + vm_size_t capacity, + vm_offset_t alignment, + task_t inTask) { - return false; + mach_vm_address_t physicalMask = 0; + return initWithPhysicalMask(inTask, options, capacity, alignment, physicalMask); } +#endif /* !__LP64__ */ -bool IOBufferMemoryDescriptor::initWithRanges( - IOVirtualRange * /* ranges */ , - UInt32 /* withCount */ , - IODirection /* withDirection */ , - task_t /* withTask */ , - bool /* asReference */ ) +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::initWithOptions( - IOOptionBits options, - vm_size_t capacity, - vm_offset_t alignment, - task_t inTask) + +bool +IOBufferMemoryDescriptor::initWithPhysicalMask( + task_t inTask, + IOOptionBits options, + mach_vm_size_t capacity, + mach_vm_address_t alignment, + mach_vm_address_t physicalMask) { - kern_return_t kr; - 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; + IODMAMapSpecification mapSpec; + bool mapped = false; + bool withCopy = false; + bool needZero; + + if (!capacity) { + return false; + } - 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; + } - _options = options; - _capacity = capacity; - _physAddrs = 0; - _physSegCount = 0; - _buffer = 0; + if (alignment >= page_size) { + capacity = round_page(capacity); + } - // Grab the direction and the Auto Prepare bits from the Buffer MD options - iomdOptions |= options & (kIOMemoryDirectionMask | kIOMemoryAutoPrepare); + if (alignment > page_size) { + options |= kIOMemoryPhysicallyContiguous; + } - if ((options & kIOMemorySharingTypeMask) && (alignment < page_size)) - alignment = page_size; + _alignment = alignment; - if ((inTask != kernel_task) && !(options & kIOMemoryPageable)) - return false; + if ((capacity + alignment) < _capacity) { + return false; + } - _alignment = alignment; - if (options & kIOMemoryPageable) - { - iomdOptions |= kIOMemoryBufferPageable; + if ((inTask != kernel_task) && !(options & kIOMemoryPageable)) { + return false; + } - ipc_port_t sharedMem; - vm_size_t size = round_page_32(capacity); + 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; + } - // must create the entry before any pages are allocated + // 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); + } + } - // set flags for entry + object create - vm_prot_t memEntryCacheMode = VM_PROT_READ | VM_PROT_WRITE - | MAP_MEM_NAMED_CREATE; + if ((options & (kIOMemoryPageable | kIOMapCacheMask))) { + vm_size_t size = round_page(capacity); - if (options & kIOMemoryPurgeable) - memEntryCacheMode |= MAP_MEM_PURGABLE; + // initWithOptions will create memory entry + if (!withCopy) { + iomdOptions |= kIOMemoryPersistent; + } - // set memory entry cache mode - switch (options & kIOMapCacheMask) - { - case kIOMapInhibitCache: - SET_MAP_MEM(MAP_MEM_IO, memEntryCacheMode); - break; - - case kIOMapWriteThruCache: - SET_MAP_MEM(MAP_MEM_WTHRU, memEntryCacheMode); - break; + 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; + } + } + } - case kIOMapWriteCombineCache: - SET_MAP_MEM(MAP_MEM_WCOMB, memEntryCacheMode); - break; + _ranges.v64->address = (mach_vm_address_t) _buffer; + _ranges.v64->length = _capacity; - case kIOMapCopybackCache: - SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode); - break; + if (!super::initWithOptions(_ranges.v64, 1, 0, + inTask, iomdOptions, /* System mapper */ NULL)) { + return false; + } - case kIOMapDefaultCache: - default: - SET_MAP_MEM(MAP_MEM_NOOP, memEntryCacheMode); - break; + _internalFlags |= kInternalFlagInit; +#if IOTRACKING + if (!(options & kIOMemoryPageable)) { + trackingAccumSize(capacity); } +#endif /* IOTRACKING */ - kr = mach_make_memory_entry( vmmap, - &size, 0, - memEntryCacheMode, &sharedMem, - NULL ); + // give any system mapper the allocation params + if (kIOReturnSuccess != dmaCommandOperation(kIOMDAddDMAMapSpec, + &mapSpec, sizeof(mapSpec))) { + return false; + } - if( (KERN_SUCCESS == kr) && (size != round_page_32(capacity))) { - ipc_port_release_send( sharedMem ); - kr = kIOReturnVMError; + 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; + } } - if( KERN_SUCCESS != kr) - return( false ); - _memEntry = (void *) sharedMem; -#if IOALLOCDEBUG - debug_iomallocpageable_size += size; -#endif - if ((NULL == inTask) && (options & kIOMemoryPageable)) - inTask = kernel_task; - else if (inTask == kernel_task) - { - vmmap = kernel_map; - } - else - { - - if( !reserved) { - reserved = IONew( ExpansionData, 1 ); - if( !reserved) - return( false ); - } - vmmap = get_task_map(inTask); - vm_map_reference(vmmap); - reserved->map = vmmap; - } - } - else - { - // @@@ gvdl: Need to remove this - // Buffer should never 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 = 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::initWithOptions(&_singleRange.v, 1, 0, - inTask, iomdOptions, /* System mapper */ 0)) - return false; - - if (options & kIOMemoryPageable) - { - kern_return_t kr; - - if (vmmap) - { - kr = doMap(vmmap, (IOVirtualAddress *) &_buffer, kIOMapAnywhere, 0, round_page_32(capacity)); - if (KERN_SUCCESS != kr) - { - _buffer = 0; - return( false ); - } - _singleRange.v.address = (vm_address_t) _buffer; - } - } - - setLength(capacity); - - return true; + setLength(_capacity); + + return true; +} + +IOBufferMemoryDescriptor * +IOBufferMemoryDescriptor::inTaskWithOptions( + task_t inTask, + IOOptionBits options, + vm_size_t capacity, + vm_offset_t alignment) +{ + IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; + + if (me && !me->initWithPhysicalMask(inTask, options, capacity, alignment, 0)) { + me->release(); + me = NULL; + } + return me; } -IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::inTaskWithOptions( - task_t inTask, - IOOptionBits options, - vm_size_t capacity, - vm_offset_t alignment) +IOBufferMemoryDescriptor * +IOBufferMemoryDescriptor::inTaskWithOptions( + task_t inTask, + IOOptionBits options, + vm_size_t capacity, + vm_offset_t alignment, + uint32_t kernTag, + uint32_t userTag) { - IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; - - if (me && !me->initWithOptions(options, capacity, alignment, inTask)) { - me->release(); - me = 0; - } - return me; + 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::initWithOptions( - IOOptionBits options, - vm_size_t capacity, - vm_offset_t alignment) +IOBufferMemoryDescriptor * +IOBufferMemoryDescriptor::inTaskWithPhysicalMask( + task_t inTask, + IOOptionBits options, + mach_vm_size_t capacity, + mach_vm_address_t physicalMask) { - return( initWithOptions(options, capacity, alignment, kernel_task) ); + IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; + + if (me && !me->initWithPhysicalMask(inTask, options, capacity, 1, physicalMask)) { + me->release(); + me = NULL; + } + return me; } -IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::withOptions( - 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) { - IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; - - if (me && !me->initWithOptions(options, capacity, alignment, kernel_task)) { - me->release(); - me = 0; - } - return me; + 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) +{ + IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor; + + if (me && !me->initWithPhysicalMask(kernel_task, options, capacity, alignment, 0)) { + me->release(); + me = NULL; + } + return me; } @@ -286,40 +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: @@ -329,17 +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; + 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 && !me->initWithBytes(inBytes, inLength, inDirection, inContiguous)){ - me->release(); - me = 0; - } - return me; + if (!me->appendBytes(inBytes, inLength)) { + me->release(); + me = NULL; + } + } + return me; } /* @@ -347,50 +576,74 @@ IOBufferMemoryDescriptor::withBytes(const void * inBytes, * * Free resources */ -void IOBufferMemoryDescriptor::free() +void +IOBufferMemoryDescriptor::free() { - // Cache all of the relevant information on the stack for use - // after we call super::free()! - IOOptionBits options = _options; - vm_size_t size = _capacity; - void * buffer = _buffer; - vm_map_t vmmap = 0; - vm_offset_t alignment = _alignment; - - if (reserved) - { - vmmap = reserved->map; - IODelete( reserved, ExpansionData, 1 ); - } - - /* super::free may unwire - deallocate buffer afterwards */ - super::free(); - - if (options & kIOMemoryPageable) - { + // 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 - if (!buffer || vmmap) - debug_iomallocpageable_size -= round_page_32(size); + OSAddAtomic(-size, &debug_iomalloc_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 (options & kIOMemoryPhysicallyContiguous) - IOFreeContiguous(buffer, size); - else if (alignment > 1) - IOFreeAligned(buffer, size); - else - IOFree(buffer, size); - } - if (vmmap) - vm_map_deallocate(vmmap); + IOStatisticsAlloc(kIOStatisticsFreeAligned, size); + } else if (alignment > 1) { + IOFreeAligned(buffer, size); + } else { + IOFree(buffer, size); + } + } + if (range && (kIOMemoryAsReference & flags)) { + IODelete(range, IOAddressRange, 1); + } } /* @@ -398,9 +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; } /* @@ -413,12 +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; } /* @@ -428,9 +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__ */ } /* @@ -443,15 +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); - bcopy(/* from */ bytes, (void *)(_singleRange.v.address + _length), - actualBytesToCopy); - _length += actualBytesToCopy; - _singleRange.v.length += actualBytesToCopy; + assert(_length <= _capacity); - return true; + offset = _length; + _length += actualBytesToCopy; + _ranges.v64->length += actualBytesToCopy; + + if (_task == kernel_task) { + bcopy(/* from */ bytes, (void *)(_ranges.v64->address + offset), + actualBytesToCopy); + } else { + writeBytes(offset, bytes, actualBytesToCopy); + } + + return true; } /* @@ -459,11 +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: * @@ -472,13 +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; +} + +#ifndef __LP64__ +void * +IOBufferMemoryDescriptor::getVirtualSegment(IOByteCount offset, + IOByteCount * lengthOfSegment) +{ + void * bytes = getBytesNoCopy(offset, 0); + + if (bytes && lengthOfSegment) { + *lengthOfSegment = _length - offset; + } + + return bytes; } +#endif /* !__LP64__ */ -OSMetaClassDefineReservedUsed(IOBufferMemoryDescriptor, 0); +#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);