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--- xnu/xnu-792.10.96/iokit/Kernel/IOBufferMemoryDescriptor.cpp
+++ xnu/xnu-1228/iokit/Kernel/IOBufferMemoryDescriptor.cpp
@@ -1,23 +1,29 @@
/*
* 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@
*/
#include <IOKit/assert.h>
#include <IOKit/system.h>
@@ -108,9 +114,11 @@
mach_vm_address_t physicalMask)
{
kern_return_t kr;
+ task_t mapTask = NULL;
+ vm_map_t vmmap = NULL;
addr64_t lastIOAddr;
- vm_map_t vmmap = 0;
- IOOptionBits iomdOptions = kIOMemoryAsReference | kIOMemoryTypeVirtual;
+ IOAddressRange range;
+ IOOptionBits iomdOptions = kIOMemoryTypeVirtual64;
if (!capacity)
return false;
@@ -120,100 +128,72 @@
_physAddrs = 0;
_physSegCount = 0;
_buffer = 0;
+ range.address = 0;
+ range.length = 0;
+ _ranges.v64 = ⦥
// 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;
-
- if ((inTask != kernel_task) && !(options & kIOMemoryPageable))
- return false;
+ if ((options & (kIOMemorySharingTypeMask | kIOMapCacheMask)) && (alignment < page_size))
+ alignment = page_size;
if (physicalMask && (alignment <= 1))
alignment = ((physicalMask ^ PAGE_MASK) & PAGE_MASK) + 1;
+ _alignment = alignment;
+
+ if (((inTask != kernel_task) && !(options & kIOMemoryPageable)) ||
+ (physicalMask && (options & kIOMapCacheMask)))
+ return false;
+
if ((options & kIOMemoryPhysicallyContiguous) && !physicalMask)
physicalMask = 0xFFFFFFFF;
- _alignment = alignment;
+ // 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 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))) {
- ipc_port_release_send( sharedMem );
- kr = kIOReturnVMError;
- }
- if( KERN_SUCCESS != kr)
- return( false );
-
- _memEntry = (void *) sharedMem;
-#if IOALLOCDEBUG
- debug_iomallocpageable_size += size;
-#endif
- if (NULL == inTask)
- 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;
- }
+ memEntryCacheMode |= MAP_MEM_NAMED_CREATE;
+
+ if (options & kIOMemoryPurgeable)
+ memEntryCacheMode |= MAP_MEM_PURGABLE;
}
else
{
+ memEntryCacheMode |= MAP_MEM_NAMED_REUSE;
+
if (IOMapper::gSystem)
// assuming mapped space is 2G
lastIOAddr = (1UL << 31) - PAGE_SIZE;
@@ -223,33 +203,21 @@
if (physicalMask && (lastIOAddr != (lastIOAddr & physicalMask)))
{
mach_vm_address_t address;
- iomdOptions &= ~kIOMemoryTypeVirtual;
- iomdOptions |= kIOMemoryTypePhysical;
+ iomdOptions &= ~kIOMemoryTypeVirtual64;
+ iomdOptions |= kIOMemoryTypePhysical64;
address = IOMallocPhysical(capacity, physicalMask);
_buffer = (void *) address;
if (!_buffer)
return false;
- if (inTask == kernel_task)
- {
- vmmap = kernel_map;
- }
- else if (NULL != inTask)
- {
- if( !reserved) {
- reserved = IONew( ExpansionData, 1 );
- if( !reserved)
- return( false );
- }
- vmmap = get_task_map(inTask);
- vm_map_reference(vmmap);
- reserved->map = vmmap;
- }
+ mapTask = inTask;
inTask = 0;
}
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;
@@ -266,11 +234,52 @@
}
}
- _singleRange.v.address = (vm_address_t) _buffer;
- _singleRange.v.length = capacity;
-
- if (!super::initWithOptions(&_singleRange.v, 1, 0,
- inTask, iomdOptions, /* System mapper */ 0))
+ if( (kIOMemoryTypePhysical64 != (kIOMemoryTypeMask & iomdOptions))
+ && (options & (kIOMemoryPageable | kIOMapCacheMask))) {
+ ipc_port_t sharedMem;
+ vm_size_t size = round_page_32(capacity);
+
+ kr = mach_make_memory_entry(vmmap,
+ &size, (vm_offset_t)_buffer,
+ memEntryCacheMode, &sharedMem,
+ NULL );
+
+ if( (KERN_SUCCESS == kr) && (size != round_page_32(capacity))) {
+ ipc_port_release_send( sharedMem );
+ kr = kIOReturnVMError;
+ }
+ if( KERN_SUCCESS != kr)
+ return( false );
+
+ _memEntry = (void *) sharedMem;
+
+ if( options & kIOMemoryPageable) {
+#if IOALLOCDEBUG
+ debug_iomallocpageable_size += size;
+#endif
+ 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;
+ }
+ }
+ }
+
+ range.address = (mach_vm_address_t) _buffer;
+ range.length = capacity;
+
+ if (!super::initWithOptions(&range, 1, 0,
+ inTask, iomdOptions, /* System mapper */ 0))
return false;
if (physicalMask && !IOMapper::gSystem)
@@ -300,7 +309,7 @@
if (lastIOAddr != (lastIOAddr & physicalMask))
{
- if (kIOMemoryTypePhysical != (_flags & kIOMemoryTypeMask))
+ if (kIOMemoryTypePhysical64 != (_flags & kIOMemoryTypeMask))
{
// flag a retry
_physSegCount = 1;
@@ -309,21 +318,28 @@
}
}
- if (vmmap)
- {
- kr = doMap(vmmap, (IOVirtualAddress *) &_buffer, kIOMapAnywhere, 0, capacity);
- if (KERN_SUCCESS != kr)
+ if (mapTask)
+ {
+ if (!reserved) {
+ reserved = IONew( ExpansionData, 1 );
+ if( !reserved)
+ return( false );
+ }
+ reserved->map = map(mapTask, 0, kIOMapAnywhere, 0, 0);
+ if (!reserved->map)
{
_buffer = 0;
return( false );
}
-
- if (kIOMemoryTypeVirtual & iomdOptions)
- _singleRange.v.address = (vm_address_t) _buffer;
+ release(); // map took a retain on this
+ mach_vm_address_t buffer = reserved->map->getAddress();
+ _buffer = (void *) buffer;
+ if (kIOMemoryTypeVirtual64 == (kIOMemoryTypeMask & iomdOptions))
+ _ranges.v64->address = buffer;
}
setLength(capacity);
-
+
return true;
}
@@ -484,14 +500,16 @@
IOOptionBits options = _options;
vm_size_t size = _capacity;
void * buffer = _buffer;
- IOVirtualAddress source = _singleRange.v.address;
- vm_map_t vmmap = 0;
+ IOVirtualAddress source = _ranges.v64->address;
+ IOMemoryMap * map = 0;
vm_offset_t alignment = _alignment;
if (reserved)
{
- vmmap = reserved->map;
+ map = reserved->map;
IODelete( reserved, ExpansionData, 1 );
+ if (map)
+ map->release();
}
/* super::free may unwire - deallocate buffer afterwards */
@@ -500,25 +518,13 @@
if (options & kIOMemoryPageable)
{
#if IOALLOCDEBUG
- if (!buffer || vmmap)
- debug_iomallocpageable_size -= round_page_32(size);
+ debug_iomallocpageable_size -= round_page_32(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 (kIOMemoryTypePhysical == (flags & kIOMemoryTypeMask))
- {
- if (vmmap)
- vm_deallocate(vmmap, (vm_address_t) buffer, round_page_32(size));
+ if (kIOMemoryTypePhysical64 == (flags & kIOMemoryTypeMask))
IOFreePhysical((mach_vm_address_t) source, size);
- }
else if (options & kIOMemoryPhysicallyContiguous)
IOKernelFreeContiguous((mach_vm_address_t) buffer, size);
else if (alignment > 1)
@@ -526,8 +532,6 @@
else
IOFree(buffer, size);
}
- if (vmmap)
- vm_map_deallocate(vmmap);
}
/*
@@ -555,7 +559,7 @@
assert(length <= _capacity);
_length = length;
- _singleRange.v.length = length;
+ _ranges.v64->length = length;
}
/*
@@ -587,10 +591,10 @@
offset = _length;
_length += actualBytesToCopy;
- _singleRange.v.length += actualBytesToCopy;
+ _ranges.v64->length += actualBytesToCopy;
if (_task == kernel_task)
- bcopy(/* from */ bytes, (void *)(_singleRange.v.address + offset),
+ bcopy(/* from */ bytes, (void *)(_ranges.v64->address + offset),
actualBytesToCopy);
else
writeBytes(offset, bytes, actualBytesToCopy);
@@ -605,10 +609,10 @@
*/
void * IOBufferMemoryDescriptor::getBytesNoCopy()
{
- if (kIOMemoryTypePhysical == (_flags & kIOMemoryTypeMask))
+ if (kIOMemoryTypePhysical64 == (_flags & kIOMemoryTypeMask))
return _buffer;
else
- return (void *)_singleRange.v.address;
+ return (void *)_ranges.v64->address;
}
@@ -621,10 +625,10 @@
IOBufferMemoryDescriptor::getBytesNoCopy(vm_size_t start, vm_size_t withLength)
{
IOVirtualAddress address;
- if (kIOMemoryTypePhysical == (_flags & kIOMemoryTypeMask))
+ if (kIOMemoryTypePhysical64 == (_flags & kIOMemoryTypeMask))
address = (IOVirtualAddress) _buffer;
else
- address = _singleRange.v.address;
+ address = _ranges.v64->address;
if (start < _length && (start + withLength) <= _length)
return (void *)(address + start);