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--- xnu/xnu-792/iokit/Kernel/IOBufferMemoryDescriptor.cpp
+++ xnu/xnu-2050.22.13/iokit/Kernel/IOBufferMemoryDescriptor.cpp
@@ -1,163 +1,481 @@
/*
* Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_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 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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.
+ * 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_LICENSE_HEADER_END@
- */
+ * @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 <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>
-vm_map_t IOPageableMapForAddress( vm_address_t address );
__END_DECLS
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+enum
+{
+ kInternalFlagPhysical = 0x00000001,
+ kInternalFlagPageSized = 0x00000002,
+ kInternalFlagPageAllocated = 0x00000004
+};
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#if 0
+#undef assert
+#define assert(ex) \
+ ((ex) ? (void)0 : Assert(__FILE__, __LINE__, # ex))
+#endif
+
+enum
+{
+ kIOPageAllocChunkBytes = (PAGE_SIZE / 64),
+ kIOPageAllocSignature = 'iopa'
+};
+
+struct io_pagealloc_t
+{
+ queue_chain_t link;
+ uint64_t avail;
+ uint32_t signature;
+};
+typedef struct io_pagealloc_t io_pagealloc_t;
+
+typedef char io_pagealloc_t_assert[(sizeof(io_pagealloc_t) <= kIOPageAllocChunkBytes) ? 1 : -1];
+
+IOSimpleLock * gIOPageAllocLock;
+queue_head_t gIOPageAllocList;
+vm_size_t gIOPageAllocCount;
+vm_size_t gIOPageAllocBytes;
+
+static io_pagealloc_t *
+iopa_allocpage(void)
+{
+ kern_return_t kr;
+ io_pagealloc_t * pa;
+ 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) return (0);
+
+ bzero((void *) vmaddr, page_size);
+ pa = (typeof(pa)) (vmaddr + page_size - kIOPageAllocChunkBytes);
+
+ pa->signature = kIOPageAllocSignature;
+ pa->avail = -2ULL;
+
+ return (pa);
+}
+
+static void
+iopa_freepage(io_pagealloc_t * pa)
+{
+ kmem_free( kernel_map, trunc_page((uintptr_t) pa), page_size);
+}
+
+static uintptr_t
+iopa_allocinpage(io_pagealloc_t * pa, uint32_t count, uint64_t align)
+{
+ uint32_t n, s;
+ uint64_t avail = pa->avail;
+
+ assert(avail);
+
+ // find strings of count 1 bits in avail
+ for (n = count; n > 1; n -= s)
+ {
+ s = n >> 1;
+ avail = avail & (avail << s);
+ }
+ // and aligned
+ avail &= align;
+
+ if (avail)
+ {
+ n = __builtin_clzll(avail);
+ pa->avail &= ~((-1ULL << (64 - count)) >> n);
+ if (!pa->avail && pa->link.next)
+ {
+ remque(&pa->link);
+ pa->link.next = 0;
+ }
+ return (n * kIOPageAllocChunkBytes + trunc_page((uintptr_t) pa));
+ }
+
+ return (0);
+}
+
+static uint32_t
+log2up(uint32_t size)
+{
+ if (size <= 1) size = 0;
+ else size = 32 - __builtin_clz(size - 1);
+ return (size);
+}
+
+static uintptr_t
+iopa_alloc(vm_size_t bytes, uint32_t balign)
+{
+ static const uint64_t align_masks[] = {
+ 0xFFFFFFFFFFFFFFFF,
+ 0xAAAAAAAAAAAAAAAA,
+ 0x8888888888888888,
+ 0x8080808080808080,
+ 0x8000800080008000,
+ 0x8000000080000000,
+ 0x8000000000000000,
+ };
+ io_pagealloc_t * pa;
+ uintptr_t addr = 0;
+ uint32_t count;
+ uint64_t align;
+
+ if (!bytes) bytes = 1;
+ count = (bytes + kIOPageAllocChunkBytes - 1) / kIOPageAllocChunkBytes;
+ align = align_masks[log2up((balign + kIOPageAllocChunkBytes - 1) / kIOPageAllocChunkBytes)];
+
+ IOSimpleLockLock(gIOPageAllocLock);
+ pa = (typeof(pa)) queue_first(&gIOPageAllocList);
+ while (!queue_end(&gIOPageAllocList, &pa->link))
+ {
+ addr = iopa_allocinpage(pa, count, align);
+ if (addr)
+ {
+ gIOPageAllocBytes += bytes;
+ break;
+ }
+ pa = (typeof(pa)) queue_next(&pa->link);
+ }
+ IOSimpleLockUnlock(gIOPageAllocLock);
+ if (!addr)
+ {
+ pa = iopa_allocpage();
+ if (pa)
+ {
+ addr = iopa_allocinpage(pa, count, align);
+ IOSimpleLockLock(gIOPageAllocLock);
+ if (pa->avail) enqueue_head(&gIOPageAllocList, &pa->link);
+ gIOPageAllocCount++;
+ if (addr) gIOPageAllocBytes += bytes;
+ IOSimpleLockUnlock(gIOPageAllocLock);
+ }
+ }
+
+ if (addr)
+ {
+ assert((addr & ((1 << log2up(balign)) - 1)) == 0);
+ IOStatisticsAlloc(kIOStatisticsMallocAligned, bytes);
+#if IOALLOCDEBUG
+ debug_iomalloc_size += bytes;
+#endif
+ }
+
+ return (addr);
+}
+
+static void
+iopa_free(uintptr_t addr, vm_size_t bytes)
+{
+ io_pagealloc_t * pa;
+ uint32_t count;
+ uintptr_t chunk;
+
+ if (!bytes) bytes = 1;
+
+ chunk = (addr & page_mask);
+ assert(0 == (chunk & (kIOPageAllocChunkBytes - 1)));
+
+ pa = (typeof(pa)) (addr | (page_size - kIOPageAllocChunkBytes));
+ assert(kIOPageAllocSignature == pa->signature);
+
+ count = (bytes + kIOPageAllocChunkBytes - 1) / kIOPageAllocChunkBytes;
+ chunk /= kIOPageAllocChunkBytes;
+
+ IOSimpleLockLock(gIOPageAllocLock);
+ if (!pa->avail)
+ {
+ assert(!pa->link.next);
+ enqueue_tail(&gIOPageAllocList, &pa->link);
+ }
+ pa->avail |= ((-1ULL << (64 - count)) >> chunk);
+ if (pa->avail != -2ULL) pa = 0;
+ else
+ {
+ remque(&pa->link);
+ pa->link.next = 0;
+ pa->signature = 0;
+ gIOPageAllocCount--;
+ }
+ gIOPageAllocBytes -= bytes;
+ IOSimpleLockUnlock(gIOPageAllocLock);
+ if (pa) iopa_freepage(pa);
+
+#if IOALLOCDEBUG
+ debug_iomalloc_size -= bytes;
+#endif
+ IOStatisticsAlloc(kIOStatisticsFreeAligned, bytes);
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#define super IOGeneralMemoryDescriptor
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,
vm_offset_t alignment,
task_t inTask)
{
- kern_return_t kr;
- vm_map_t vmmap = 0;
- IOOptionBits iomdOptions = kIOMemoryAsReference | kIOMemoryTypeVirtual;
+ mach_vm_address_t physicalMask = 0;
+ return (initWithPhysicalMask(inTask, options, capacity, alignment, physicalMask));
+}
+#endif /* !__LP64__ */
+
+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;
+ 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;
- _options = options;
- _capacity = capacity;
- _physAddrs = 0;
- _physSegCount = 0;
- _buffer = 0;
-
- // Grab the direction and the Auto Prepare bits from the Buffer MD options
- iomdOptions |= options & (kIOMemoryDirectionMask | kIOMemoryAutoPrepare);
-
- if ((options & kIOMemorySharingTypeMask) && (alignment < page_size))
- alignment = page_size;
+ _options = options;
+ _capacity = capacity;
+ _internalFlags = 0;
+ _internalReserved = 0;
+ _buffer = 0;
+
+ _ranges.v64 = IONew(IOAddressRange, 1);
+ if (!_ranges.v64)
+ 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 (!(kIOMemoryMapperNone & options))
+ {
+ IOMapper::checkForSystemMapper();
+ mapped = (0 != IOMapper::gSystem);
+ }
+ needZero = mapped;
+
+ 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 ((inTask != kernel_task) && !(options & kIOMemoryPageable))
- return false;
-
- _alignment = alignment;
+ 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 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;
+
+ case kIOMapWriteCombineCache:
+ SET_MAP_MEM(MAP_MEM_WCOMB, memEntryCacheMode);
+ break;
+
+ case kIOMapCopybackCache:
+ 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);
+ break;
+ }
+
if (options & kIOMemoryPageable)
{
- iomdOptions |= kIOMemoryBufferPageable;
-
- ipc_port_t sharedMem;
- vm_size_t size = round_page_32(capacity);
-
- // must create the entry before any pages are allocated
+ iomdOptions |= kIOMemoryBufferPageable;
+
+ // 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;
-
- if (options & kIOMemoryPurgeable)
- memEntryCacheMode |= MAP_MEM_PURGABLE;
-
- // 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;
-
- 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;
- }
-
- kr = mach_make_memory_entry( vmmap,
- &size, 0,
- memEntryCacheMode, &sharedMem,
- NULL );
-
- if( (KERN_SUCCESS == kr) && (size != round_page_32(capacity))) {
+ memEntryCacheMode |= MAP_MEM_NAMED_CREATE;
+
+ if (options & kIOMemoryPurgeable)
+ memEntryCacheMode |= MAP_MEM_PURGABLE;
+ }
+ else
+ {
+ memEntryCacheMode |= MAP_MEM_NAMED_REUSE;
+ 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 - kIOPageAllocChunkBytes)))
+ {
+ _internalFlags |= kInternalFlagPageAllocated;
+ needZero = false;
+ _buffer = (void *) iopa_alloc(capacity, alignment);
+ }
+ 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))) {
+ 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;
}
@@ -165,72 +483,66 @@
return( false );
_memEntry = (void *) sharedMem;
+
+ if( options & kIOMemoryPageable) {
#if IOALLOCDEBUG
- debug_iomallocpageable_size += size;
+ 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))
+ 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)
+ {
+ *startAddr;
+ 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 */ 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;
+ // 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 );
- }
- _singleRange.v.address = (vm_address_t) _buffer;
- }
- }
-
- setLength(capacity);
-
+ }
+ reserved->map = createMappingInTask(mapTask, 0,
+ kIOMapAnywhere | (options & kIOMapCacheMask), 0, 0);
+ if (!reserved->map)
+ {
+ _buffer = 0;
+ 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;
}
@@ -242,20 +554,38 @@
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithOptions(options, capacity, alignment, inTask)) {
+ if (me && !me->initWithPhysicalMask(inTask, options, capacity, alignment, 0)) {
me->release();
me = 0;
}
return me;
}
+IOBufferMemoryDescriptor * IOBufferMemoryDescriptor::inTaskWithPhysicalMask(
+ task_t inTask,
+ IOOptionBits options,
+ mach_vm_size_t capacity,
+ mach_vm_address_t physicalMask)
+{
+ IOBufferMemoryDescriptor *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,
@@ -264,7 +594,7 @@
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithOptions(options, capacity, alignment, kernel_task)) {
+ if (me && !me->initWithPhysicalMask(kernel_task, options, capacity, alignment, 0)) {
me->release();
me = 0;
}
@@ -289,6 +619,7 @@
inCapacity, inContiguous ? inCapacity : 1 ));
}
+#ifndef __LP64__
/*
* initWithBytes:
*
@@ -300,10 +631,9 @@
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
@@ -314,6 +644,7 @@
return true;
}
+#endif /* !__LP64__ */
/*
* withBytes:
@@ -329,9 +660,25 @@
{
IOBufferMemoryDescriptor *me = new IOBufferMemoryDescriptor;
- if (me && !me->initWithBytes(inBytes, inLength, inDirection, inContiguous)){
- me->release();
- me = 0;
+ if (me && !me->initWithPhysicalMask(
+ kernel_task, inDirection | kIOMemoryUnshared
+ | (inContiguous ? kIOMemoryPhysicallyContiguous : 0),
+ inLength, inLength, 0 ))
+ {
+ me->release();
+ me = 0;
+ }
+
+ if (me)
+ {
+ // start out with no data
+ me->setLength(0);
+
+ if (!me->appendBytes(inBytes, inLength))
+ {
+ me->release();
+ me = 0;
+ }
}
return me;
}
@@ -345,16 +692,24 @@
{
// 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;
+ IOOptionBits flags = _flags;
+ IOOptionBits internalFlags = _internalFlags;
+ IOOptionBits options = _options;
+ vm_size_t size = _capacity;
+ void * buffer = _buffer;
+ 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 */
@@ -363,28 +718,32 @@
if (options & kIOMemoryPageable)
{
#if IOALLOCDEBUG
- if (!buffer || vmmap)
- debug_iomallocpageable_size -= round_page_32(size);
+ debug_iomallocpageable_size -= round_page(size);
#endif
- if (buffer)
+ }
+ else if (buffer)
+ {
+ if (kInternalFlagPageSized & internalFlags) size = round_page(size);
+
+ if (kInternalFlagPhysical & internalFlags)
{
- 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);
+ IOKernelFreePhysical((mach_vm_address_t) buffer, size);
+ }
+ else if (kInternalFlagPageAllocated & internalFlags)
+ {
+ iopa_free((uintptr_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);
}
/*
@@ -412,7 +771,7 @@
assert(length <= _capacity);
_length = length;
- _singleRange.v.length = length;
+ _ranges.v64->length = length;
}
/*
@@ -424,7 +783,10 @@
*/
void IOBufferMemoryDescriptor::setDirection(IODirection direction)
{
- _direction = direction;
+ _flags = (_flags & ~kIOMemoryDirectionMask) | direction;
+#ifndef __LP64__
+ _direction = (IODirection) (_flags & kIOMemoryDirectionMask);
+#endif /* !__LP64__ */
}
/*
@@ -437,13 +799,20 @@
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);
+
+ offset = _length;
_length += actualBytesToCopy;
- _singleRange.v.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;
}
@@ -455,8 +824,12 @@
*/
void * IOBufferMemoryDescriptor::getBytesNoCopy()
{
- return (void *)_singleRange.v.address;
-}
+ if (kIOMemoryTypePhysical64 == (_flags & kIOMemoryTypeMask))
+ return _buffer;
+ else
+ return (void *)_ranges.v64->address;
+}
+
/*
* getBytesNoCopy:
@@ -466,13 +839,37 @@
void *
IOBufferMemoryDescriptor::getBytesNoCopy(vm_size_t start, vm_size_t withLength)
{
- if (start < _length && (start + withLength) <= _length)
- return (void *)(_singleRange.v.address + start);
+ IOVirtualAddress address;
+ if (kIOMemoryTypePhysical64 == (_flags & kIOMemoryTypeMask))
+ address = (IOVirtualAddress) _buffer;
+ else
+ address = _ranges.v64->address;
+
+ if (start < _length && (start + withLength) <= _length)
+ return (void *)(address + start);
return 0;
}
+#ifndef __LP64__
+void * IOBufferMemoryDescriptor::getVirtualSegment(IOByteCount offset,
+ IOByteCount * lengthOfSegment)
+{
+ 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);
-OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 1);
+OSMetaClassDefineReservedUsed(IOBufferMemoryDescriptor, 1);
+#endif /* !__LP64__ */
OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 2);
OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 3);
OSMetaClassDefineReservedUnused(IOBufferMemoryDescriptor, 4);