/*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2004 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_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
- * 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@
+ * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
*/
/*
* Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
* HISTORY
*
*/
+// 45678901234567890123456789012345678901234567890123456789012345678901234567890
+#include <sys/cdefs.h>
#include <IOKit/assert.h>
#include <IOKit/system.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOMemoryDescriptor.h>
+#include <IOKit/IOMapper.h>
+#include <IOKit/IOKitKeysPrivate.h>
#include <IOKit/IOKitDebug.h>
+#include "IOKitKernelInternal.h"
+#include "IOCopyMapper.h"
+
#include <libkern/c++/OSContainers.h>
-#include <sys/cdefs.h>
+#include <libkern/c++/OSDictionary.h>
+#include <libkern/c++/OSArray.h>
+#include <libkern/c++/OSSymbol.h>
+#include <libkern/c++/OSNumber.h>
+
+#include <sys/uio.h>
__BEGIN_DECLS
#include <vm/pmap.h>
-void pmap_enter(pmap_t pmap, vm_offset_t va, vm_offset_t pa,
- vm_prot_t prot, boolean_t wired);
+#include <vm/vm_pageout.h>
+#include <vm/vm_shared_memory_server.h>
+#include <mach/memory_object_types.h>
+#include <device/device_port.h>
+
+#include <mach/vm_prot.h>
+#include <vm/vm_fault.h>
+
+extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
void ipc_port_release_send(ipc_port_t port);
-vm_offset_t vm_map_get_phys_page(vm_map_t map, vm_offset_t offset);
+
+/* Copy between a physical page and a virtual address in the given vm_map */
+kern_return_t copypv(addr64_t source, addr64_t sink, unsigned int size, int which);
+
+memory_object_t
+device_pager_setup(
+ memory_object_t pager,
+ int device_handle,
+ vm_size_t size,
+ int flags);
+void
+device_pager_deallocate(
+ memory_object_t);
+kern_return_t
+device_pager_populate_object(
+ memory_object_t pager,
+ vm_object_offset_t offset,
+ ppnum_t phys_addr,
+ vm_size_t size);
+kern_return_t
+memory_object_iopl_request(
+ ipc_port_t port,
+ memory_object_offset_t offset,
+ vm_size_t *upl_size,
+ upl_t *upl_ptr,
+ upl_page_info_array_t user_page_list,
+ unsigned int *page_list_count,
+ int *flags);
+
+unsigned int IOTranslateCacheBits(struct phys_entry *pp);
+
__END_DECLS
+#define kIOMaximumMappedIOByteCount (512*1024*1024)
+
+static IOMapper * gIOSystemMapper = NULL;
+
+IOCopyMapper * gIOCopyMapper = NULL;
+
+static ppnum_t gIOMaximumMappedIOPageCount = atop_32(kIOMaximumMappedIOByteCount);
+
+ppnum_t gIOLastPage;
+
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-OSDefineMetaClass( IOMemoryDescriptor, OSObject )
-OSDefineAbstractStructors( IOMemoryDescriptor, OSObject )
+OSDefineMetaClassAndAbstractStructors( IOMemoryDescriptor, OSObject )
#define super IOMemoryDescriptor
OSDefineMetaClassAndStructors(IOGeneralMemoryDescriptor, IOMemoryDescriptor)
-extern "C" vm_map_t IOPageableMapForAddress( vm_address_t address );
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+static IORecursiveLock * gIOMemoryLock;
+
+#define LOCK IORecursiveLockLock( gIOMemoryLock)
+#define UNLOCK IORecursiveLockUnlock( gIOMemoryLock)
+#define SLEEP IORecursiveLockSleep( gIOMemoryLock, (void *)this, THREAD_UNINT)
+#define WAKEUP \
+ IORecursiveLockWakeup( gIOMemoryLock, (void *)this, /* one-thread */ false)
+
+#if 0
+#define DEBG(fmt, args...) { kprintf(fmt, ## args); }
+#else
+#define DEBG(fmt, args...) {}
+#endif
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+class _IOMemoryMap : public IOMemoryMap
+{
+ OSDeclareDefaultStructors(_IOMemoryMap)
+public:
+ IOMemoryDescriptor * memory;
+ IOMemoryMap * superMap;
+ IOByteCount offset;
+ IOByteCount length;
+ IOVirtualAddress logical;
+ task_t addressTask;
+ vm_map_t addressMap;
+ IOOptionBits options;
+ upl_t redirUPL;
+ ipc_port_t redirEntry;
+ IOMemoryDescriptor * owner;
+
+protected:
+ virtual void taggedRelease(const void *tag = 0) const;
+ virtual void free();
+
+public:
+
+ // IOMemoryMap methods
+ virtual IOVirtualAddress getVirtualAddress();
+ virtual IOByteCount getLength();
+ virtual task_t getAddressTask();
+ virtual IOMemoryDescriptor * getMemoryDescriptor();
+ virtual IOOptionBits getMapOptions();
+
+ virtual IOReturn unmap();
+ virtual void taskDied();
+
+ virtual IOReturn redirect(IOMemoryDescriptor * newBackingMemory,
+ IOOptionBits options,
+ IOByteCount offset = 0);
+
+ virtual IOPhysicalAddress getPhysicalSegment(IOByteCount offset,
+ IOByteCount * length);
+
+ // for IOMemoryDescriptor use
+ _IOMemoryMap * copyCompatible(
+ IOMemoryDescriptor * owner,
+ task_t intoTask,
+ IOVirtualAddress toAddress,
+ IOOptionBits options,
+ IOByteCount offset,
+ IOByteCount length );
+
+ bool initCompatible(
+ IOMemoryDescriptor * memory,
+ IOMemoryMap * superMap,
+ IOByteCount offset,
+ IOByteCount length );
+
+ bool initWithDescriptor(
+ IOMemoryDescriptor * memory,
+ task_t intoTask,
+ IOVirtualAddress toAddress,
+ IOOptionBits options,
+ IOByteCount offset,
+ IOByteCount length );
+
+ IOReturn redirect(
+ task_t intoTask, bool redirect );
+};
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-inline vm_map_t IOGeneralMemoryDescriptor::getMapForTask( task_t task, vm_address_t address )
+// Some data structures and accessor macros used by the initWithOptions
+// Function
+
+enum ioPLBlockFlags {
+ kIOPLOnDevice = 0x00000001,
+ kIOPLExternUPL = 0x00000002,
+};
+
+struct typePersMDData
{
- if( (task == kernel_task) && (kIOMemoryRequiresWire & _flags))
- return( IOPageableMapForAddress( address ) );
+ const IOGeneralMemoryDescriptor *fMD;
+ ipc_port_t fMemEntry;
+};
+
+struct ioPLBlock {
+ upl_t fIOPL;
+ vm_address_t fIOMDOffset; // The offset of this iopl in descriptor
+ vm_offset_t fPageInfo; // Pointer to page list or index into it
+ ppnum_t fMappedBase; // Page number of first page in this iopl
+ unsigned int fPageOffset; // Offset within first page of iopl
+ unsigned int fFlags; // Flags
+};
+
+struct ioGMDData {
+ IOMapper *fMapper;
+ unsigned int fPageCnt;
+ upl_page_info_t fPageList[];
+ ioPLBlock fBlocks[];
+};
+
+#define getDataP(osd) ((ioGMDData *) (osd)->getBytesNoCopy())
+#define getIOPLList(d) ((ioPLBlock *) &(d->fPageList[d->fPageCnt]))
+#define getNumIOPL(osd, d) \
+ (((osd)->getLength() - ((char *) getIOPLList(d) - (char *) d)) / sizeof(ioPLBlock))
+#define getPageList(d) (&(d->fPageList[0]))
+#define computeDataSize(p, u) \
+ (sizeof(ioGMDData) + p * sizeof(upl_page_info_t) + u * sizeof(ioPLBlock))
+
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#define next_page(a) ( trunc_page_32(a) + PAGE_SIZE )
+
+
+extern "C" {
+
+kern_return_t device_data_action(
+ int device_handle,
+ ipc_port_t device_pager,
+ vm_prot_t protection,
+ vm_object_offset_t offset,
+ vm_size_t size)
+{
+ struct ExpansionData {
+ void * devicePager;
+ unsigned int pagerContig:1;
+ unsigned int unused:31;
+ IOMemoryDescriptor * memory;
+ };
+ kern_return_t kr;
+ ExpansionData * ref = (ExpansionData *) device_handle;
+ IOMemoryDescriptor * memDesc;
+
+ LOCK;
+ memDesc = ref->memory;
+ if( memDesc)
+ {
+ memDesc->retain();
+ kr = memDesc->handleFault( device_pager, 0, 0,
+ offset, size, kIOMapDefaultCache /*?*/);
+ memDesc->release();
+ }
else
- return( get_task_map( task ));
+ kr = KERN_ABORTED;
+ UNLOCK;
+
+ return( kr );
+}
+
+kern_return_t device_close(
+ int device_handle)
+{
+ struct ExpansionData {
+ void * devicePager;
+ unsigned int pagerContig:1;
+ unsigned int unused:31;
+ IOMemoryDescriptor * memory;
+ };
+ ExpansionData * ref = (ExpansionData *) device_handle;
+
+ IODelete( ref, ExpansionData, 1 );
+
+ return( kIOReturnSuccess );
+}
+}; // end extern "C"
+
+// Note this inline function uses C++ reference arguments to return values
+// This means that pointers are not passed and NULLs don't have to be
+// checked for as a NULL reference is illegal.
+static inline void
+getAddrLenForInd(addr64_t &addr, IOPhysicalLength &len, // Output variables
+ UInt32 type, IOGeneralMemoryDescriptor::Ranges r, UInt32 ind)
+{
+ assert(kIOMemoryTypeUIO == type
+ || kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type
+ || kIOMemoryTypePhysical == type || kIOMemoryTypePhysical64 == type);
+ if (kIOMemoryTypeUIO == type) {
+ user_size_t us;
+ uio_getiov((uio_t) r.uio, ind, &addr, &us); len = us;
+ }
+ else if ((kIOMemoryTypeVirtual64 == type) || (kIOMemoryTypePhysical64 == type)) {
+ IOAddressRange cur = r.v64[ind];
+ addr = cur.address;
+ len = cur.length;
+ }
+ else {
+ IOVirtualRange cur = r.v[ind];
+ addr = cur.address;
+ len = cur.length;
+ }
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
*/
IOMemoryDescriptor *
IOMemoryDescriptor::withAddress(void * address,
- IOByteCount withLength,
- IODirection withDirection)
+ IOByteCount length,
+ IODirection direction)
{
+ return IOMemoryDescriptor::
+ withAddress((vm_address_t) address, length, direction, kernel_task);
+}
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withAddress(vm_address_t address,
+ IOByteCount length,
+ IODirection direction,
+ task_t task)
+{
+#if TEST_V64
+ if (task)
+ {
+ IOOptionBits options = (IOOptionBits) direction;
+ if (task == kernel_task)
+ options |= kIOMemoryAutoPrepare;
+ return (IOMemoryDescriptor::withAddressRange(address, length, options, task));
+ }
+#endif
IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
if (that)
{
- if (that->initWithAddress(address, withLength, withDirection))
+ if (that->initWithAddress(address, length, direction, task))
return that;
that->release();
}
IOMemoryDescriptor *
-IOMemoryDescriptor::withAddress(vm_address_t address,
- IOByteCount withLength,
- IODirection withDirection,
- task_t withTask)
+IOMemoryDescriptor::withPhysicalAddress(
+ IOPhysicalAddress address,
+ IOByteCount length,
+ IODirection direction )
+{
+#if TEST_P64
+ return (IOMemoryDescriptor::withAddressRange(address, length, (IOOptionBits) direction, NULL));
+#endif
+ IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
+ if (self
+ && !self->initWithPhysicalAddress(address, length, direction)) {
+ self->release();
+ return 0;
+ }
+
+ return self;
+}
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withRanges( IOVirtualRange * ranges,
+ UInt32 withCount,
+ IODirection direction,
+ task_t task,
+ bool asReference)
{
IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
if (that)
{
- if (that->initWithAddress(address, withLength, withDirection, withTask))
+ if (that->initWithRanges(ranges, withCount, direction, task, asReference))
return that;
that->release();
}
IOMemoryDescriptor *
-IOMemoryDescriptor::withPhysicalAddress(
- IOPhysicalAddress address,
- IOByteCount withLength,
- IODirection withDirection )
+IOMemoryDescriptor::withAddressRange(mach_vm_address_t address,
+ mach_vm_size_t length,
+ IOOptionBits options,
+ task_t task)
{
- return( IOMemoryDescriptor::withAddress( address, withLength,
- withDirection, (task_t) 0 ));
+ IOAddressRange range = { address, length };
+ return (IOMemoryDescriptor::withAddressRanges(&range, 1, options, task));
+}
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withAddressRanges(IOAddressRange * ranges,
+ UInt32 rangeCount,
+ IOOptionBits options,
+ task_t task)
+{
+ IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
+ if (that)
+ {
+ if (task)
+ options |= kIOMemoryTypeVirtual64;
+ else
+ options |= kIOMemoryTypePhysical64;
+
+ if (that->initWithOptions(ranges, rangeCount, 0, task, options, /* mapper */ 0))
+ return that;
+
+ that->release();
+ }
+
+ return 0;
}
* Passing the ranges as a reference will avoid an extra allocation.
*/
IOMemoryDescriptor *
-IOMemoryDescriptor::withRanges( IOVirtualRange * ranges,
- UInt32 withCount,
- IODirection withDirection,
- task_t withTask,
- bool asReference = false)
+IOMemoryDescriptor::withOptions(void * buffers,
+ UInt32 count,
+ UInt32 offset,
+ task_t task,
+ IOOptionBits opts,
+ IOMapper * mapper)
{
- IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
- if (that)
- {
- if (that->initWithRanges(ranges, withCount, withDirection, withTask, asReference))
- return that;
+ IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
- that->release();
+ if (self
+ && !self->initWithOptions(buffers, count, offset, task, opts, mapper))
+ {
+ self->release();
+ return 0;
}
+
+ return self;
+}
+
+// Can't leave abstract but this should never be used directly,
+bool IOMemoryDescriptor::initWithOptions(void * buffers,
+ UInt32 count,
+ UInt32 offset,
+ task_t task,
+ IOOptionBits options,
+ IOMapper * mapper)
+{
+ // @@@ gvdl: Should I panic?
+ panic("IOMD::initWithOptions called\n");
return 0;
}
IOMemoryDescriptor *
IOMemoryDescriptor::withPhysicalRanges( IOPhysicalRange * ranges,
UInt32 withCount,
- IODirection withDirection,
- bool asReference = false)
+ IODirection direction,
+ bool asReference)
{
IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
if (that)
{
- if (that->initWithPhysicalRanges(ranges, withCount, withDirection, asReference))
+ if (that->initWithPhysicalRanges(ranges, withCount, direction, asReference))
return that;
that->release();
IOMemoryDescriptor::withSubRange(IOMemoryDescriptor * of,
IOByteCount offset,
IOByteCount length,
- IODirection withDirection)
+ IODirection direction)
{
- IOSubMemoryDescriptor * that = new IOSubMemoryDescriptor;
+ IOSubMemoryDescriptor *self = new IOSubMemoryDescriptor;
- if (that && !that->initSubRange(of, offset, length, withDirection)) {
- that->release();
- that = 0;
+ if (self && !self->initSubRange(of, offset, length, direction)) {
+ self->release();
+ self = 0;
+ }
+ return self;
+}
+
+IOMemoryDescriptor *
+IOMemoryDescriptor::withPersistentMemoryDescriptor(IOMemoryDescriptor *originalMD)
+{
+ IOGeneralMemoryDescriptor *origGenMD =
+ OSDynamicCast(IOGeneralMemoryDescriptor, originalMD);
+
+ if (origGenMD)
+ return IOGeneralMemoryDescriptor::
+ withPersistentMemoryDescriptor(origGenMD);
+ else
+ return 0;
+}
+
+IOMemoryDescriptor *
+IOGeneralMemoryDescriptor::withPersistentMemoryDescriptor(IOGeneralMemoryDescriptor *originalMD)
+{
+ ipc_port_t sharedMem = (ipc_port_t) originalMD->createNamedEntry();
+
+ if (!sharedMem)
+ return 0;
+
+ if (sharedMem == originalMD->_memEntry) {
+ originalMD->retain(); // Add a new reference to ourselves
+ ipc_port_release_send(sharedMem); // Remove extra send right
+ return originalMD;
+ }
+
+ IOGeneralMemoryDescriptor * self = new IOGeneralMemoryDescriptor;
+ typePersMDData initData = { originalMD, sharedMem };
+
+ if (self
+ && !self->initWithOptions(&initData, 1, 0, 0, kIOMemoryTypePersistentMD, 0)) {
+ self->release();
+ self = 0;
+ }
+ return self;
+}
+
+void *IOGeneralMemoryDescriptor::createNamedEntry()
+{
+ kern_return_t error;
+ ipc_port_t sharedMem;
+
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
+
+ user_addr_t range0Addr;
+ IOByteCount range0Len;
+ getAddrLenForInd(range0Addr, range0Len, type, _ranges, 0);
+ range0Addr = trunc_page_64(range0Addr);
+
+ vm_size_t size = ptoa_32(_pages);
+ vm_address_t kernelPage = (vm_address_t) range0Addr;
+
+ vm_map_t theMap = ((_task == kernel_task)
+ && (kIOMemoryBufferPageable & _flags))
+ ? IOPageableMapForAddress(kernelPage)
+ : get_task_map(_task);
+
+ memory_object_size_t actualSize = size;
+ vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE;
+ if (_memEntry)
+ prot |= MAP_MEM_NAMED_REUSE;
+
+ error = mach_make_memory_entry_64(theMap,
+ &actualSize, range0Addr, prot, &sharedMem, (ipc_port_t) _memEntry);
+
+ if (KERN_SUCCESS == error) {
+ if (actualSize == size) {
+ return sharedMem;
+ } else {
+#if IOASSERT
+ IOLog("IOGMD::mach_make_memory_entry_64 (%08llx) size (%08lx:%08x)\n",
+ (UInt64)range0Addr, (UInt32)actualSize, size);
+#endif
+ ipc_port_release_send( sharedMem );
+ }
}
- return that;
+
+ return MACH_PORT_NULL;
}
/*
return initWithPhysicalRanges( &_singleRange.p, 1, withDirection, true);
}
+bool
+IOGeneralMemoryDescriptor::initWithPhysicalRanges(
+ IOPhysicalRange * ranges,
+ UInt32 count,
+ IODirection direction,
+ bool reference)
+{
+ IOOptionBits mdOpts = direction | kIOMemoryTypePhysical;
+
+ if (reference)
+ mdOpts |= kIOMemoryAsReference;
+
+ return initWithOptions(ranges, count, 0, 0, mdOpts, /* mapper */ 0);
+}
+
+bool
+IOGeneralMemoryDescriptor::initWithRanges(
+ IOVirtualRange * ranges,
+ UInt32 count,
+ IODirection direction,
+ task_t task,
+ bool reference)
+{
+ IOOptionBits mdOpts = direction;
+
+ if (reference)
+ mdOpts |= kIOMemoryAsReference;
+
+ if (task) {
+ mdOpts |= kIOMemoryTypeVirtual;
+
+ // Auto-prepare if this is a kernel memory descriptor as very few
+ // clients bother to prepare() kernel memory.
+ // But it was not enforced so what are you going to do?
+ if (task == kernel_task)
+ mdOpts |= kIOMemoryAutoPrepare;
+ }
+ else
+ mdOpts |= kIOMemoryTypePhysical;
+
+ return initWithOptions(ranges, count, 0, task, mdOpts, /* mapper */ 0);
+}
+
/*
- * initWithRanges:
+ * initWithOptions:
*
- * Initialize an IOMemoryDescriptor. The buffer is made up of several
- * virtual address ranges, from a given task
+ * IOMemoryDescriptor. The buffer is made up of several virtual address ranges,
+ * from a given task, several physical ranges, an UPL from the ubc
+ * system or a uio (may be 64bit) from the BSD subsystem.
*
* Passing the ranges as a reference will avoid an extra allocation.
*
- * An IOMemoryDescriptor can be re-used by calling initWithAddress or
- * initWithRanges again on an existing instance -- note this behavior
- * is not commonly supported in other I/O Kit classes, although it is
- * supported here.
+ * An IOMemoryDescriptor can be re-used by calling initWithOptions again on an
+ * existing instance -- note this behavior is not commonly supported in other
+ * I/O Kit classes, although it is supported here.
*/
+
bool
-IOGeneralMemoryDescriptor::initWithRanges(
- IOVirtualRange * ranges,
- UInt32 withCount,
- IODirection withDirection,
- task_t withTask,
- bool asReference = false)
-{
- assert(ranges);
- assert(withCount);
+IOGeneralMemoryDescriptor::initWithOptions(void * buffers,
+ UInt32 count,
+ UInt32 offset,
+ task_t task,
+ IOOptionBits options,
+ IOMapper * mapper)
+{
+ IOOptionBits type = options & kIOMemoryTypeMask;
+
+ // Grab the original MD's configuation data to initialse the
+ // arguments to this function.
+ if (kIOMemoryTypePersistentMD == type) {
+
+ typePersMDData *initData = (typePersMDData *) buffers;
+ const IOGeneralMemoryDescriptor *orig = initData->fMD;
+ ioGMDData *dataP = getDataP(orig->_memoryEntries);
+
+ // Only accept persistent memory descriptors with valid dataP data.
+ assert(orig->_rangesCount == 1);
+ if ( !(orig->_flags & kIOMemoryPersistent) || !dataP)
+ return false;
+
+ _memEntry = initData->fMemEntry; // Grab the new named entry
+ options = orig->_flags | kIOMemoryAsReference;
+ _singleRange = orig->_singleRange; // Initialise our range
+ buffers = &_singleRange;
+ count = 1;
+
+ // Now grab the original task and whatever mapper was previously used
+ task = orig->_task;
+ mapper = dataP->fMapper;
+
+ // We are ready to go through the original initialisation now
+ }
+
+ switch (type) {
+ case kIOMemoryTypeUIO:
+ case kIOMemoryTypeVirtual:
+ case kIOMemoryTypeVirtual64:
+ assert(task);
+ if (!task)
+ return false;
+ else
+ break;
+
+ case kIOMemoryTypePhysical: // Neither Physical nor UPL should have a task
+ case kIOMemoryTypePhysical64:
+ mapper = kIOMapperNone;
+
+ case kIOMemoryTypeUPL:
+ assert(!task);
+ break;
+ default:
+ return false; /* bad argument */
+ }
+
+ assert(buffers);
+ assert(count);
/*
* We can check the _initialized instance variable before having ever set
* variables are zeroed on an object's allocation.
*/
- if (_initialized == false)
- {
- if (super::init() == false) return false;
- _initialized = true;
- }
- else
- {
+ if (_initialized) {
/*
* An existing memory descriptor is being retargeted to point to
* somewhere else. Clean up our present state.
*/
- assert(_wireCount == 0);
-
while (_wireCount)
complete();
- if (_kernPtrAligned)
- unmapFromKernel();
if (_ranges.v && _rangesIsAllocated)
- IODelete(_ranges.v, IOVirtualRange, _rangesCount);
+ {
+ if (kIOMemoryTypeUIO == type)
+ uio_free((uio_t) _ranges.v);
+ else if ((kIOMemoryTypeVirtual64 == type) || (kIOMemoryTypePhysical64 == type))
+ IODelete(_ranges.v64, IOAddressRange, _rangesCount);
+ else
+ IODelete(_ranges.v, IOVirtualRange, _rangesCount);
+ }
+ if (_memEntry)
+ { ipc_port_release_send((ipc_port_t) _memEntry); _memEntry = 0; }
+ }
+ else {
+ if (!super::init())
+ return false;
+ _initialized = true;
}
- /*
- * Initialize the memory descriptor.
- */
+ // Grab the appropriate mapper
+ if (mapper == kIOMapperNone)
+ mapper = 0; // No Mapper
+ else if (mapper == kIOMapperSystem) {
+ IOMapper::checkForSystemMapper();
+ gIOSystemMapper = mapper = IOMapper::gSystem;
+ }
- _ranges.v = 0;
- _rangesCount = withCount;
- _rangesIsAllocated = asReference ? false : true;
- _direction = withDirection;
- _length = 0;
- _task = withTask;
- _position = 0;
- _positionAtIndex = 0;
- _positionAtOffset = 0;
- _kernPtrAligned = 0;
- _cachedPhysicalAddress = 0;
- _cachedVirtualAddress = 0;
- _flags = 0;
-
- if (withTask && (withTask != kernel_task))
- _flags |= kIOMemoryRequiresWire;
-
- if (asReference)
- _ranges.v = ranges;
- else
- {
- _ranges.v = IONew(IOVirtualRange, withCount);
- if (_ranges.v == 0) return false;
- bcopy(/* from */ ranges, _ranges.v, withCount * sizeof(IOVirtualRange));
- }
+ // Remove the dynamic internal use flags from the initial setting
+ options &= ~(kIOMemoryPreparedReadOnly);
+ _flags = options;
+ _task = task;
- for (unsigned index = 0; index < _rangesCount; index++)
- {
- _length += _ranges.v[index].length;
- }
+ // DEPRECATED variable initialisation
+ _direction = (IODirection) (_flags & kIOMemoryDirectionMask);
- return true;
-}
+ __iomd_reservedA = 0;
+ __iomd_reservedB = 0;
+ __iomd_reservedC = 0;
-bool
-IOGeneralMemoryDescriptor::initWithPhysicalRanges( IOPhysicalRange * ranges,
- UInt32 withCount,
- IODirection withDirection,
- bool asReference = false)
-{
-#warning assuming virtual, physical addresses same size
- return( initWithRanges( (IOVirtualRange *) ranges,
- withCount, withDirection, (task_t) 0, asReference ));
-}
+ _highestPage = 0;
-/*
- * free
- *
- * Free resources.
+ if (kIOMemoryTypeUPL == type) {
+
+ ioGMDData *dataP;
+ unsigned int dataSize = computeDataSize(/* pages */ 0, /* upls */ 1);
+
+ if (!_memoryEntries) {
+ _memoryEntries = OSData::withCapacity(dataSize);
+ if (!_memoryEntries)
+ return false;
+ }
+ else if (!_memoryEntries->initWithCapacity(dataSize))
+ return false;
+
+ _memoryEntries->appendBytes(0, sizeof(ioGMDData));
+ dataP = getDataP(_memoryEntries);
+ dataP->fMapper = mapper;
+ dataP->fPageCnt = 0;
+
+ // _wireCount++; // UPLs start out life wired
+
+ _length = count;
+ _pages += atop_32(offset + count + PAGE_MASK) - atop_32(offset);
+
+ ioPLBlock iopl;
+ upl_page_info_t *pageList = UPL_GET_INTERNAL_PAGE_LIST((upl_t) buffers);
+
+ iopl.fIOPL = (upl_t) buffers;
+ // Set the flag kIOPLOnDevice convieniently equal to 1
+ iopl.fFlags = pageList->device | kIOPLExternUPL;
+ iopl.fIOMDOffset = 0;
+
+ _highestPage = upl_get_highest_page(iopl.fIOPL);
+
+ if (!pageList->device) {
+ // Pre-compute the offset into the UPL's page list
+ pageList = &pageList[atop_32(offset)];
+ offset &= PAGE_MASK;
+ if (mapper) {
+ iopl.fMappedBase = mapper->iovmAlloc(_pages);
+ mapper->iovmInsert(iopl.fMappedBase, 0, pageList, _pages);
+ }
+ else
+ iopl.fMappedBase = 0;
+ }
+ else
+ iopl.fMappedBase = 0;
+ iopl.fPageInfo = (vm_address_t) pageList;
+ iopl.fPageOffset = offset;
+
+ _memoryEntries->appendBytes(&iopl, sizeof(iopl));
+ }
+ else {
+ // kIOMemoryTypeVirtual | kIOMemoryTypeVirtual64 | kIOMemoryTypeUIO
+ // kIOMemoryTypePhysical | kIOMemoryTypePhysical64
+
+ // Initialize the memory descriptor
+ if (options & kIOMemoryAsReference) {
+ _rangesIsAllocated = false;
+
+ // Hack assignment to get the buffer arg into _ranges.
+ // I'd prefer to do _ranges = (Ranges) buffers, but that doesn't
+ // work, C++ sigh.
+ // This also initialises the uio & physical ranges.
+ _ranges.v = (IOVirtualRange *) buffers;
+ }
+ else {
+ _rangesIsAllocated = true;
+ switch (_flags & kIOMemoryTypeMask)
+ {
+ case kIOMemoryTypeUIO:
+ _ranges.v = (IOVirtualRange *) uio_duplicate((uio_t) buffers);
+ break;
+
+ case kIOMemoryTypeVirtual64:
+ case kIOMemoryTypePhysical64:
+ _ranges.v64 = IONew(IOAddressRange, count);
+ if (!_ranges.v64)
+ return false;
+ bcopy(buffers, _ranges.v, count * sizeof(IOAddressRange));
+ break;
+ case kIOMemoryTypeVirtual:
+ _ranges.v = IONew(IOVirtualRange, count);
+ if (!_ranges.v)
+ return false;
+ bcopy(buffers, _ranges.v, count * sizeof(IOVirtualRange));
+ break;
+ }
+ }
+
+ // Find starting address within the vector of ranges
+ Ranges vec = _ranges;
+ UInt32 length = 0;
+ UInt32 pages = 0;
+ for (unsigned ind = 0; ind < count; ind++) {
+ user_addr_t addr;
+ UInt32 len;
+
+ // addr & len are returned by this function
+ getAddrLenForInd(addr, len, type, vec, ind);
+ pages += (atop_64(addr + len + PAGE_MASK) - atop_64(addr));
+ len += length;
+ assert(len >= length); // Check for 32 bit wrap around
+ length = len;
+
+ if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
+ {
+ ppnum_t highPage = atop_64(addr + len - 1);
+ if (highPage > _highestPage)
+ _highestPage = highPage;
+ }
+ }
+ _length = length;
+ _pages = pages;
+ _rangesCount = count;
+
+ // Auto-prepare memory at creation time.
+ // Implied completion when descriptor is free-ed
+ if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
+ _wireCount++; // Physical MDs are, by definition, wired
+ else { /* kIOMemoryTypeVirtual | kIOMemoryTypeVirtual64 | kIOMemoryTypeUIO */
+ ioGMDData *dataP;
+ unsigned dataSize = computeDataSize(_pages, /* upls */ count * 2);
+
+ if (!_memoryEntries) {
+ _memoryEntries = OSData::withCapacity(dataSize);
+ if (!_memoryEntries)
+ return false;
+ }
+ else if (!_memoryEntries->initWithCapacity(dataSize))
+ return false;
+
+ _memoryEntries->appendBytes(0, sizeof(ioGMDData));
+ dataP = getDataP(_memoryEntries);
+ dataP->fMapper = mapper;
+ dataP->fPageCnt = _pages;
+
+ if ( (kIOMemoryPersistent & _flags) && !_memEntry)
+ _memEntry = createNamedEntry();
+
+ if ((_flags & kIOMemoryAutoPrepare)
+ && prepare() != kIOReturnSuccess)
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/*
+ * free
+ *
+ * Free resources.
*/
void IOGeneralMemoryDescriptor::free()
{
+ LOCK;
+ if( reserved)
+ reserved->memory = 0;
+ UNLOCK;
+
while (_wireCount)
complete();
- if (_kernPtrAligned)
- unmapFromKernel();
- if (_ranges.v && _rangesIsAllocated)
- IODelete(_ranges.v, IOVirtualRange, _rangesCount);
- if( _memEntry)
- ipc_port_release_send( (ipc_port_t) _memEntry );
- super::free();
-}
+ if (_memoryEntries)
+ _memoryEntries->release();
-void IOGeneralMemoryDescriptor::unmapFromKernel()
-{
- kern_return_t krtn;
- vm_offset_t off;
- // Pull the shared pages out of the task map
- // Do we need to unwire it first?
- for ( off = 0; off < _kernSize; off += page_size )
+ if (_ranges.v && _rangesIsAllocated)
{
- pmap_change_wiring(
- kernel_pmap,
- _kernPtrAligned + off,
- FALSE);
-
- pmap_remove(
- kernel_pmap,
- _kernPtrAligned + off,
- _kernPtrAligned + off + page_size);
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
+ if (kIOMemoryTypeUIO == type)
+ uio_free((uio_t) _ranges.v);
+ else if ((kIOMemoryTypeVirtual64 == type) || (kIOMemoryTypePhysical64 == type))
+ IODelete(_ranges.v64, IOAddressRange, _rangesCount);
+ else
+ IODelete(_ranges.v, IOVirtualRange, _rangesCount);
}
- // Free the former shmem area in the task
- krtn = vm_deallocate(kernel_map,
- _kernPtrAligned,
- _kernSize );
- assert(krtn == KERN_SUCCESS);
- _kernPtrAligned = 0;
-}
-void IOGeneralMemoryDescriptor::mapIntoKernel(unsigned rangeIndex)
-{
- kern_return_t krtn;
- vm_offset_t off;
+ if (reserved && reserved->devicePager)
+ device_pager_deallocate( (memory_object_t) reserved->devicePager );
- if (_kernPtrAligned)
- {
- if (_kernPtrAtIndex == rangeIndex) return;
- unmapFromKernel();
- assert(_kernPtrAligned == 0);
- }
-
- vm_offset_t srcAlign = trunc_page(_ranges.v[rangeIndex].address);
-
- _kernSize = trunc_page(_ranges.v[rangeIndex].address +
- _ranges.v[rangeIndex].length +
- page_size - 1) - srcAlign;
-
- /* Find some memory of the same size in kernel task. We use vm_allocate()
- to do this. vm_allocate inserts the found memory object in the
- target task's map as a side effect. */
- krtn = vm_allocate( kernel_map,
- &_kernPtrAligned,
- _kernSize,
- VM_FLAGS_ANYWHERE|VM_MAKE_TAG(VM_MEMORY_IOKIT) ); // Find first fit
- assert(krtn == KERN_SUCCESS);
- if(krtn) return;
-
- /* For each page in the area allocated from the kernel map,
- find the physical address of the page.
- Enter the page in the target task's pmap, at the
- appropriate target task virtual address. */
- for ( off = 0; off < _kernSize; off += page_size )
- {
- vm_offset_t kern_phys_addr, phys_addr;
- if( _task)
- phys_addr = pmap_extract( get_task_pmap(_task), srcAlign + off );
- else
- phys_addr = srcAlign + off;
- assert(phys_addr);
- if(phys_addr == 0) return;
+ // memEntry holds a ref on the device pager which owns reserved
+ // (ExpansionData) so no reserved access after this point
+ if (_memEntry)
+ ipc_port_release_send( (ipc_port_t) _memEntry );
- // Check original state.
- kern_phys_addr = pmap_extract( kernel_pmap, _kernPtrAligned + off );
- // Set virtual page to point to the right physical one
- pmap_enter(
- kernel_pmap,
- _kernPtrAligned + off,
- phys_addr,
- VM_PROT_READ|VM_PROT_WRITE,
- TRUE);
- }
- _kernPtrAtIndex = rangeIndex;
+ super::free();
}
+/* DEPRECATED */ void IOGeneralMemoryDescriptor::unmapFromKernel()
+/* DEPRECATED */ {
+ panic("IOGMD::unmapFromKernel deprecated");
+/* DEPRECATED */ }
+/* DEPRECATED */
+/* DEPRECATED */ void IOGeneralMemoryDescriptor::mapIntoKernel(unsigned rangeIndex)
+/* DEPRECATED */ {
+ panic("IOGMD::mapIntoKernel deprecated");
+/* DEPRECATED */ }
+
/*
* getDirection:
*
return _length;
}
-void IOMemoryDescriptor::setTag(
- IOOptionBits tag )
+void IOMemoryDescriptor::setTag( IOOptionBits tag )
{
_tag = tag;
}
return( _tag);
}
-/*
- * setPosition
- *
- * Set the logical start position inside the client buffer.
- *
- * It is convention that the position reflect the actual byte count that
- * is successfully transferred into or out of the buffer, before the I/O
- * request is "completed" (ie. sent back to its originator).
- */
+// @@@ gvdl: who is using this API? Seems like a wierd thing to implement.
+IOPhysicalAddress
+IOMemoryDescriptor::getSourceSegment( IOByteCount offset, IOByteCount * length )
+{
+ addr64_t physAddr = 0;
+
+ if( prepare() == kIOReturnSuccess) {
+ physAddr = getPhysicalSegment64( offset, length );
+ complete();
+ }
-void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
+ return( (IOPhysicalAddress) physAddr ); // truncated but only page offset is used
+}
+
+IOByteCount IOMemoryDescriptor::readBytes
+ (IOByteCount offset, void *bytes, IOByteCount length)
{
- assert(position <= _length);
+ addr64_t dstAddr = (addr64_t) (UInt32) bytes;
+ IOByteCount remaining;
- if (position >= _length)
- {
- _position = _length;
- _positionAtIndex = _rangesCount; /* careful: out-of-bounds */
- _positionAtOffset = 0;
- return;
+ // Assert that this entire I/O is withing the available range
+ assert(offset < _length);
+ assert(offset + length <= _length);
+ if (offset >= _length) {
+IOLog("IOGMD(%p): rB = o%lx, l%lx\n", this, offset, length); // @@@ gvdl
+ return 0;
}
- if (position < _position)
- {
- _positionAtOffset = position;
- _positionAtIndex = 0;
+ remaining = length = min(length, _length - offset);
+ while (remaining) { // (process another target segment?)
+ addr64_t srcAddr64;
+ IOByteCount srcLen;
+
+ srcAddr64 = getPhysicalSegment64(offset, &srcLen);
+ if (!srcAddr64)
+ break;
+
+ // Clip segment length to remaining
+ if (srcLen > remaining)
+ srcLen = remaining;
+
+ copypv(srcAddr64, dstAddr, srcLen,
+ cppvPsrc | cppvNoRefSrc | cppvFsnk | cppvKmap);
+
+ dstAddr += srcLen;
+ offset += srcLen;
+ remaining -= srcLen;
}
- else
- {
- _positionAtOffset += (position - _position);
+
+ assert(!remaining);
+
+ return length - remaining;
+}
+
+IOByteCount IOMemoryDescriptor::writeBytes
+ (IOByteCount offset, const void *bytes, IOByteCount length)
+{
+ addr64_t srcAddr = (addr64_t) (UInt32) bytes;
+ IOByteCount remaining;
+
+ // Assert that this entire I/O is withing the available range
+ assert(offset < _length);
+ assert(offset + length <= _length);
+
+ assert( !(kIOMemoryPreparedReadOnly & _flags) );
+
+ if ( (kIOMemoryPreparedReadOnly & _flags) || offset >= _length) {
+IOLog("IOGMD(%p): wB = o%lx, l%lx\n", this, offset, length); // @@@ gvdl
+ return 0;
}
- _position = position;
- while (_positionAtOffset >= _ranges.v[_positionAtIndex].length)
- {
- _positionAtOffset -= _ranges.v[_positionAtIndex].length;
- _positionAtIndex++;
+ remaining = length = min(length, _length - offset);
+ while (remaining) { // (process another target segment?)
+ addr64_t dstAddr64;
+ IOByteCount dstLen;
+
+ dstAddr64 = getPhysicalSegment64(offset, &dstLen);
+ if (!dstAddr64)
+ break;
+
+ // Clip segment length to remaining
+ if (dstLen > remaining)
+ dstLen = remaining;
+
+ copypv(srcAddr, (addr64_t) dstAddr64, dstLen,
+ cppvPsnk | cppvFsnk | cppvNoRefSrc | cppvNoModSnk | cppvKmap);
+
+ srcAddr += dstLen;
+ offset += dstLen;
+ remaining -= dstLen;
}
+
+ assert(!remaining);
+
+ return length - remaining;
}
-/*
- * readBytes:
- *
- * Copy data from the memory descriptor's buffer into the specified buffer,
- * relative to the current position. The memory descriptor's position is
- * advanced based on the number of bytes copied.
- */
+// osfmk/device/iokit_rpc.c
+extern "C" unsigned int IODefaultCacheBits(addr64_t pa);
+
+/* DEPRECATED */ void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
+/* DEPRECATED */ {
+ panic("IOGMD::setPosition deprecated");
+/* DEPRECATED */ }
+
+IOReturn IOGeneralMemoryDescriptor::dmaCommandOperation(DMACommandOps op, void *vData, UInt dataSize) const
+{
+ if (kIOMDGetCharacteristics == op) {
+
+ if (dataSize < sizeof(IOMDDMACharacteristics))
+ return kIOReturnUnderrun;
+
+ IOMDDMACharacteristics *data = (IOMDDMACharacteristics *) vData;
+ data->fLength = _length;
+ data->fSGCount = _rangesCount;
+ data->fPages = _pages;
+ data->fDirection = _direction;
+ if (!_wireCount)
+ data->fIsPrepared = false;
+ else {
+ data->fIsPrepared = true;
+ data->fHighestPage = _highestPage;
+ if (_memoryEntries) {
+ ioGMDData *gmdData = getDataP(_memoryEntries);
+ ioPLBlock *ioplList = getIOPLList(gmdData);
+ UInt count = getNumIOPL(_memoryEntries, gmdData);
+
+ data->fIsMapped = (gmdData->fMapper && _pages && (count > 0)
+ && ioplList[0].fMappedBase);
+ if (count == 1)
+ data->fPageAlign = (ioplList[0].fPageOffset & PAGE_MASK) | ~PAGE_MASK;
+ }
+ else
+ data->fIsMapped = false;
+ }
-IOByteCount IOGeneralMemoryDescriptor::readBytes(IOByteCount offset,
- void * bytes, IOByteCount withLength)
-{
- IOByteCount bytesLeft;
- void * segment;
- IOByteCount segmentLength;
+ return kIOReturnSuccess;
+ }
+ else if (!(kIOMDWalkSegments & op))
+ return kIOReturnBadArgument;
+
+ // Get the next segment
+ struct InternalState {
+ IOMDDMAWalkSegmentArgs fIO;
+ UInt fOffset2Index;
+ UInt fIndex;
+ UInt fNextOffset;
+ } *isP;
+
+ // Find the next segment
+ if (dataSize < sizeof(*isP))
+ return kIOReturnUnderrun;
+
+ isP = (InternalState *) vData;
+ UInt offset = isP->fIO.fOffset;
+ bool mapped = isP->fIO.fMapped;
+
+ if (offset >= _length)
+ return (offset == _length)? kIOReturnOverrun : kIOReturnInternalError;
+
+ // Validate the previous offset
+ UInt ind, off2Ind = isP->fOffset2Index;
+ if ((kIOMDFirstSegment != op)
+ && offset
+ && (offset == isP->fNextOffset || off2Ind <= offset))
+ ind = isP->fIndex;
+ else
+ ind = off2Ind = 0; // Start from beginning
- if( offset != _position)
- setPosition( offset );
+ UInt length;
+ UInt64 address;
+ if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical) {
- withLength = min(withLength, _length - _position);
- bytesLeft = withLength;
+ // Physical address based memory descriptor
+ const IOPhysicalRange *physP = (IOPhysicalRange *) &_ranges.p[0];
-#if 0
- while (bytesLeft && (_position < _length))
- {
- /* Compute the relative length to the end of this virtual segment. */
- segmentLength = min(_ranges.v[_positionAtIndex].length - _positionAtOffset, bytesLeft);
+ // Find the range after the one that contains the offset
+ UInt len;
+ for (len = 0; off2Ind <= offset; ind++) {
+ len = physP[ind].length;
+ off2Ind += len;
+ }
- /* Compute the relative address of this virtual segment. */
- segment = (void *)(_ranges.v[_positionAtIndex].address + _positionAtOffset);
+ // Calculate length within range and starting address
+ length = off2Ind - offset;
+ address = physP[ind - 1].address + len - length;
- if (KERN_SUCCESS != vm_map_read_user(getMapForTask(_task, segment),
- /* from */ (vm_offset_t) segment, /* to */ (vm_offset_t) bytes,
- /* size */ segmentLength))
- {
- assert( false );
- bytesLeft = withLength;
- break;
+ // see how far we can coalesce ranges
+ while (ind < _rangesCount && address + length == physP[ind].address) {
+ len = physP[ind].length;
+ length += len;
+ off2Ind += len;
+ ind++;
}
- bytesLeft -= segmentLength;
- offset += segmentLength;
- setPosition(offset);
+
+ // correct contiguous check overshoot
+ ind--;
+ off2Ind -= len;
}
-#else
- while (bytesLeft && (segment = getVirtualSegment(offset, &segmentLength)))
- {
- segmentLength = min(segmentLength, bytesLeft);
- bcopy(/* from */ segment, /* to */ bytes, /* size */ segmentLength);
- bytesLeft -= segmentLength;
- offset += segmentLength;
- bytes = (void *) (((UInt32) bytes) + segmentLength);
+ else if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64) {
+
+ // Physical address based memory descriptor
+ const IOAddressRange *physP = (IOAddressRange *) &_ranges.v64[0];
+
+ // Find the range after the one that contains the offset
+ mach_vm_size_t len;
+ for (len = 0; off2Ind <= offset; ind++) {
+ len = physP[ind].length;
+ off2Ind += len;
+ }
+
+ // Calculate length within range and starting address
+ length = off2Ind - offset;
+ address = physP[ind - 1].address + len - length;
+
+ // see how far we can coalesce ranges
+ while (ind < _rangesCount && address + length == physP[ind].address) {
+ len = physP[ind].length;
+ length += len;
+ off2Ind += len;
+ ind++;
+ }
+
+ // correct contiguous check overshoot
+ ind--;
+ off2Ind -= len;
}
-#endif
+ else do {
+ if (!_wireCount)
+ panic("IOGMD: not wired for the IODMACommand");
- return withLength - bytesLeft;
-}
+ assert(_memoryEntries);
-/*
- * writeBytes:
- *
- * Copy data to the memory descriptor's buffer from the specified buffer,
- * relative to the current position. The memory descriptor's position is
- * advanced based on the number of bytes copied.
- */
-IOByteCount IOGeneralMemoryDescriptor::writeBytes(IOByteCount offset,
- const void* bytes,IOByteCount withLength)
-{
- IOByteCount bytesLeft;
- void * segment;
- IOByteCount segmentLength;
+ ioGMDData * dataP = getDataP(_memoryEntries);
+ const ioPLBlock *ioplList = getIOPLList(dataP);
+ UInt numIOPLs = getNumIOPL(_memoryEntries, dataP);
+ upl_page_info_t *pageList = getPageList(dataP);
- if( offset != _position)
- setPosition( offset );
+ assert(numIOPLs > 0);
- withLength = min(withLength, _length - _position);
- bytesLeft = withLength;
+ // Scan through iopl info blocks looking for block containing offset
+ while (ind < numIOPLs && offset >= ioplList[ind].fIOMDOffset)
+ ind++;
-#if 0
- while (bytesLeft && (_position < _length))
- {
- assert(_position <= _length);
+ // Go back to actual range as search goes past it
+ ioPLBlock ioplInfo = ioplList[ind - 1];
+ off2Ind = ioplInfo.fIOMDOffset;
+
+ if (ind < numIOPLs)
+ length = ioplList[ind].fIOMDOffset;
+ else
+ length = _length;
+ length -= offset; // Remainder within iopl
+
+ // Subtract offset till this iopl in total list
+ offset -= off2Ind;
+
+ // If a mapped address is requested and this is a pre-mapped IOPL
+ // then just need to compute an offset relative to the mapped base.
+ if (mapped && ioplInfo.fMappedBase) {
+ offset += (ioplInfo.fPageOffset & PAGE_MASK);
+ address = ptoa_64(ioplInfo.fMappedBase) + offset;
+ continue; // Done leave do/while(false) now
+ }
- /* Compute the relative length to the end of this virtual segment. */
- segmentLength = min(_ranges.v[_positionAtIndex].length - _positionAtOffset, bytesLeft);
+ // The offset is rebased into the current iopl.
+ // Now add the iopl 1st page offset.
+ offset += ioplInfo.fPageOffset;
- /* Compute the relative address of this virtual segment. */
- segment = (void *)(_ranges.v[_positionAtIndex].address + _positionAtOffset);
+ // For external UPLs the fPageInfo field points directly to
+ // the upl's upl_page_info_t array.
+ if (ioplInfo.fFlags & kIOPLExternUPL)
+ pageList = (upl_page_info_t *) ioplInfo.fPageInfo;
+ else
+ pageList = &pageList[ioplInfo.fPageInfo];
+
+ // Check for direct device non-paged memory
+ if ( ioplInfo.fFlags & kIOPLOnDevice ) {
+ address = ptoa_64(pageList->phys_addr) + offset;
+ continue; // Done leave do/while(false) now
+ }
+
+ // Now we need compute the index into the pageList
+ UInt pageInd = atop_32(offset);
+ offset &= PAGE_MASK;
- if (KERN_SUCCESS != vm_map_write_user(getMapForTask(_task, segment),
- /* from */ (vm_offset_t) bytes,
- /* to */ (vm_offset_t) segment,
- /* size */ segmentLength))
+ // Compute the starting address of this segment
+ IOPhysicalAddress pageAddr = pageList[pageInd].phys_addr;
+ address = ptoa_64(pageAddr) + offset;
+
+ // length is currently set to the length of the remainider of the iopl.
+ // We need to check that the remainder of the iopl is contiguous.
+ // This is indicated by pageList[ind].phys_addr being sequential.
+ IOByteCount contigLength = PAGE_SIZE - offset;
+ while (contigLength < length
+ && ++pageAddr == pageList[++pageInd].phys_addr)
{
- assert( false );
- bytesLeft = withLength;
- break;
+ contigLength += PAGE_SIZE;
}
- bytesLeft -= segmentLength;
- offset += segmentLength;
- setPosition(offset);
- }
-#else
- while (bytesLeft && (segment = getVirtualSegment(offset, &segmentLength)))
+
+ if (contigLength < length)
+ length = contigLength;
+
+
+ assert(address);
+ assert(length);
+
+ } while (false);
+
+ // Update return values and state
+ isP->fIO.fIOVMAddr = address;
+ isP->fIO.fLength = length;
+ isP->fIndex = ind;
+ isP->fOffset2Index = off2Ind;
+ isP->fNextOffset = isP->fIO.fOffset + length;
+
+ return kIOReturnSuccess;
+}
+
+addr64_t
+IOGeneralMemoryDescriptor::getPhysicalSegment64(IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ IOReturn ret;
+ IOByteCount length = 0;
+ addr64_t address = 0;
+
+ if (offset < _length) // (within bounds?)
{
- segmentLength = min(segmentLength, bytesLeft);
- bcopy(/* from */ bytes, /* to */ segment, /* size */ segmentLength);
- // Flush cache in case we're copying code around, eg. handling a code page fault
- IOFlushProcessorCache(kernel_task, (vm_offset_t) segment, segmentLength );
-
- bytesLeft -= segmentLength;
- offset += segmentLength;
- bytes = (void *) (((UInt32) bytes) + segmentLength);
+ IOMDDMAWalkSegmentState _state;
+ IOMDDMAWalkSegmentArgs * state = (IOMDDMAWalkSegmentArgs *) &_state;
+
+ state->fOffset = offset;
+ state->fLength = _length - offset;
+ state->fMapped = false;
+
+ ret = dmaCommandOperation(kIOMDFirstSegment, _state, sizeof(_state));
+
+ if ((kIOReturnSuccess != ret) && (kIOReturnOverrun != ret))
+ DEBG("getPhysicalSegment64 dmaCommandOperation(%lx), %p, offset %qx, addr %qx, len %qx\n",
+ ret, this, state->fOffset,
+ state->fIOVMAddr, state->fLength);
+ if (kIOReturnSuccess == ret)
+ {
+ address = state->fIOVMAddr;
+ length = state->fLength;
+ }
+ if (!address)
+ length = 0;
}
-#endif
- return withLength - bytesLeft;
+ if (lengthOfSegment)
+ *lengthOfSegment = length;
+
+ return (address);
}
-/*
- * 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
-IOGeneralMemoryDescriptor::getPhysicalSegment(IOByteCount offset,
- IOByteCount * lengthOfSegment)
+IOGeneralMemoryDescriptor::getPhysicalSegment(IOByteCount offset, IOByteCount *lengthOfSegment)
{
- vm_address_t virtualAddress;
- IOByteCount virtualLength;
- pmap_t virtualPMap;
- IOPhysicalAddress physicalAddress;
- IOPhysicalLength physicalLength;
+ IOReturn ret;
+ IOByteCount length = 0;
+ addr64_t address = 0;
- if( kIOMemoryRequiresWire & _flags)
- assert( _wireCount );
+// assert(offset <= _length);
- if ((0 == _task) && (1 == _rangesCount))
+ if (offset < _length) // (within bounds?)
{
- assert(offset <= _length);
- if (offset >= _length)
- {
- physicalAddress = 0;
- physicalLength = 0;
- }
- else
+ IOMDDMAWalkSegmentState _state;
+ IOMDDMAWalkSegmentArgs * state = (IOMDDMAWalkSegmentArgs *) &_state;
+
+ state->fOffset = offset;
+ state->fLength = _length - offset;
+ state->fMapped = true;
+
+ ret = dmaCommandOperation(
+ kIOMDFirstSegment, _state, sizeof(_state));
+
+ if ((kIOReturnSuccess != ret) && (kIOReturnOverrun != ret))
+ DEBG("getPhysicalSegment dmaCommandOperation(%lx), %p, offset %qx, addr %qx, len %qx\n",
+ ret, this, state->fOffset,
+ state->fIOVMAddr, state->fLength);
+ if (kIOReturnSuccess == ret)
{
- physicalLength = _length - offset;
- physicalAddress = offset + _ranges.v[0].address;
+ address = state->fIOVMAddr;
+ length = state->fLength;
}
- if (lengthOfSegment)
- *lengthOfSegment = physicalLength;
- return physicalAddress;
+ if (!address)
+ length = 0;
+ }
+
+ if ((address + length) > 0x100000000ULL)
+ {
+ panic("getPhysicalSegment() out of 32b range 0x%qx, len 0x%x, class %s",
+ address, length, (getMetaClass())->getClassName());
}
- if( offset != _position)
- setPosition( offset );
+ if (lengthOfSegment)
+ *lengthOfSegment = length;
+
+ return ((IOPhysicalAddress) address);
+}
+
+addr64_t
+IOMemoryDescriptor::getPhysicalSegment64(IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ IOPhysicalAddress phys32;
+ IOByteCount length;
+ addr64_t phys64;
+ IOMapper * mapper = 0;
+
+ phys32 = getPhysicalSegment(offset, lengthOfSegment);
+ if (!phys32)
+ return 0;
- assert(_position <= _length);
+ if (gIOSystemMapper)
+ mapper = gIOSystemMapper;
- /* Fail gracefully if the position is at (or past) the end-of-buffer. */
- if (_position >= _length)
+ if (mapper)
{
- *lengthOfSegment = 0;
- return 0;
+ IOByteCount origLen;
+
+ phys64 = mapper->mapAddr(phys32);
+ origLen = *lengthOfSegment;
+ length = page_size - (phys64 & (page_size - 1));
+ while ((length < origLen)
+ && ((phys64 + length) == mapper->mapAddr(phys32 + length)))
+ length += page_size;
+ if (length > origLen)
+ length = origLen;
+
+ *lengthOfSegment = length;
}
+ else
+ phys64 = (addr64_t) phys32;
- /* Prepare to compute the largest contiguous physical length possible. */
+ return phys64;
+}
- virtualAddress = _ranges.v[_positionAtIndex].address + _positionAtOffset;
- virtualLength = _ranges.v[_positionAtIndex].length - _positionAtOffset;
- vm_address_t virtualPage = trunc_page(virtualAddress);
- if( _task)
- virtualPMap = get_task_pmap(_task);
- else
- virtualPMap = 0;
+IOPhysicalAddress
+IOGeneralMemoryDescriptor::getSourceSegment(IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ IOPhysicalAddress address = 0;
+ IOPhysicalLength length = 0;
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
- physicalAddress = (virtualAddress == _cachedVirtualAddress) ?
- _cachedPhysicalAddress : /* optimization */
- virtualPMap ?
- pmap_extract(virtualPMap, virtualAddress) :
- virtualAddress;
- physicalLength = trunc_page(physicalAddress) + page_size - physicalAddress;
+ assert(offset <= _length);
- if (!physicalAddress && _task)
+ if ( type == kIOMemoryTypeUPL)
+ return super::getSourceSegment( offset, lengthOfSegment );
+ else if ( offset < _length ) // (within bounds?)
{
- physicalAddress =
- vm_map_get_phys_page(get_task_map(_task), virtualPage);
- physicalAddress += virtualAddress - virtualPage;
+ unsigned rangesIndex = 0;
+ Ranges vec = _ranges;
+ user_addr_t addr;
+
+ // Find starting address within the vector of ranges
+ for (;;) {
+ getAddrLenForInd(addr, length, type, vec, rangesIndex);
+ if (offset < length)
+ break;
+ offset -= length; // (make offset relative)
+ rangesIndex++;
+ }
+
+ // Now that we have the starting range,
+ // lets find the last contiguous range
+ addr += offset;
+ length -= offset;
+
+ for ( ++rangesIndex; rangesIndex < _rangesCount; rangesIndex++ ) {
+ user_addr_t newAddr;
+ IOPhysicalLength newLen;
+
+ getAddrLenForInd(newAddr, newLen, type, vec, rangesIndex);
+ if (addr + length != newAddr)
+ break;
+ length += newLen;
+ }
+ if (addr)
+ address = (IOPhysicalAddress) addr; // Truncate address to 32bit
+ else
+ length = 0;
}
- if (physicalAddress == 0) /* memory must be wired in order to proceed */
- {
- assert(physicalAddress);
- *lengthOfSegment = 0;
- return 0;
+ if ( lengthOfSegment ) *lengthOfSegment = length;
+
+ return address;
+}
+
+/* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
+/* DEPRECATED */ void * IOGeneralMemoryDescriptor::getVirtualSegment(IOByteCount offset,
+/* DEPRECATED */ IOByteCount * lengthOfSegment)
+/* DEPRECATED */ {
+ if (_task == kernel_task)
+ return (void *) getSourceSegment(offset, lengthOfSegment);
+ else
+ panic("IOGMD::getVirtualSegment deprecated");
+
+ return 0;
+/* DEPRECATED */ }
+/* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
+
+
+
+IOReturn
+IOMemoryDescriptor::dmaCommandOperation(DMACommandOps op, void *vData, UInt dataSize) const
+{
+ if (kIOMDGetCharacteristics == op) {
+ if (dataSize < sizeof(IOMDDMACharacteristics))
+ return kIOReturnUnderrun;
+
+ IOMDDMACharacteristics *data = (IOMDDMACharacteristics *) vData;
+ data->fLength = getLength();
+ data->fSGCount = 0;
+ data->fDirection = _direction;
+ if (IOMapper::gSystem)
+ data->fIsMapped = true;
+ data->fIsPrepared = true; // Assume prepared - fails safe
}
+ else if (kIOMDWalkSegments & op) {
+ if (dataSize < sizeof(IOMDDMAWalkSegmentArgs))
+ return kIOReturnUnderrun;
- /* Compute the largest contiguous physical length possible, within range. */
- IOPhysicalAddress physicalPage = trunc_page(physicalAddress);
+ IOMDDMAWalkSegmentArgs *data = (IOMDDMAWalkSegmentArgs *) vData;
+ IOByteCount offset = (IOByteCount) data->fOffset;
- while (physicalLength < virtualLength)
+ IOPhysicalLength length;
+ IOMemoryDescriptor *ncmd = const_cast<IOMemoryDescriptor *>(this);
+ if (data->fMapped && IOMapper::gSystem)
+ data->fIOVMAddr = ncmd->getPhysicalSegment(offset, &length);
+ else
+ data->fIOVMAddr = ncmd->getPhysicalSegment64(offset, &length);
+ data->fLength = length;
+ }
+ else
+ return kIOReturnBadArgument;
+
+ return kIOReturnSuccess;
+}
+
+IOReturn IOMemoryDescriptor::setPurgeable( IOOptionBits newState,
+ IOOptionBits * oldState )
+{
+ IOReturn err = kIOReturnSuccess;
+ vm_purgable_t control;
+ int state;
+
+ do
{
- physicalPage += page_size;
- virtualPage += page_size;
- _cachedVirtualAddress = virtualPage;
- _cachedPhysicalAddress = virtualPMap ?
- pmap_extract(virtualPMap, virtualPage) :
- virtualPage;
- if (!_cachedPhysicalAddress && _task)
- {
- _cachedPhysicalAddress =
- vm_map_get_phys_page(get_task_map(_task), virtualPage);
- }
+ if (!_memEntry)
+ {
+ err = kIOReturnNotReady;
+ break;
+ }
- if (_cachedPhysicalAddress != physicalPage) break;
+ control = VM_PURGABLE_SET_STATE;
+ switch (newState)
+ {
+ case kIOMemoryPurgeableKeepCurrent:
+ control = VM_PURGABLE_GET_STATE;
+ break;
+
+ case kIOMemoryPurgeableNonVolatile:
+ state = VM_PURGABLE_NONVOLATILE;
+ break;
+ case kIOMemoryPurgeableVolatile:
+ state = VM_PURGABLE_VOLATILE;
+ break;
+ case kIOMemoryPurgeableEmpty:
+ state = VM_PURGABLE_EMPTY;
+ break;
+ default:
+ err = kIOReturnBadArgument;
+ break;
+ }
- physicalLength += page_size;
- }
+ if (kIOReturnSuccess != err)
+ break;
- /* Clip contiguous physical length at the end of this range. */
- if (physicalLength > virtualLength)
- physicalLength = virtualLength;
+ err = mach_memory_entry_purgable_control((ipc_port_t) _memEntry, control, &state);
- if( lengthOfSegment)
- *lengthOfSegment = physicalLength;
+ if (oldState)
+ {
+ if (kIOReturnSuccess == err)
+ {
+ switch (state)
+ {
+ case VM_PURGABLE_NONVOLATILE:
+ state = kIOMemoryPurgeableNonVolatile;
+ break;
+ case VM_PURGABLE_VOLATILE:
+ state = kIOMemoryPurgeableVolatile;
+ break;
+ case VM_PURGABLE_EMPTY:
+ state = kIOMemoryPurgeableEmpty;
+ break;
+ default:
+ state = kIOMemoryPurgeableNonVolatile;
+ err = kIOReturnNotReady;
+ break;
+ }
+ *oldState = state;
+ }
+ }
+ }
+ while (false);
- return physicalAddress;
+ return (err);
}
+extern "C" void dcache_incoherent_io_flush64(addr64_t pa, unsigned int count);
+extern "C" void dcache_incoherent_io_store64(addr64_t pa, unsigned int count);
-/*
- * getVirtualSegment:
- *
- * Get the virtual address of the buffer, relative to the current position.
- * If the memory wasn't mapped into the caller's address space, it will be
- * mapped in now. If the current position is at the end of the buffer, a
- * null is returned.
- */
-void * IOGeneralMemoryDescriptor::getVirtualSegment(IOByteCount offset,
- IOByteCount * lengthOfSegment)
+IOReturn IOMemoryDescriptor::performOperation( IOOptionBits options,
+ IOByteCount offset, IOByteCount length )
{
- if( offset != _position)
- setPosition( offset );
+ IOByteCount remaining;
+ void (*func)(addr64_t pa, unsigned int count) = 0;
- assert(_position <= _length);
-
- /* Fail gracefully if the position is at (or past) the end-of-buffer. */
- if (_position >= _length)
+ switch (options)
{
- *lengthOfSegment = 0;
- return 0;
+ case kIOMemoryIncoherentIOFlush:
+ func = &dcache_incoherent_io_flush64;
+ break;
+ case kIOMemoryIncoherentIOStore:
+ func = &dcache_incoherent_io_store64;
+ break;
}
- /* Compute the relative length to the end of this virtual segment. */
- *lengthOfSegment = _ranges.v[_positionAtIndex].length - _positionAtOffset;
+ if (!func)
+ return (kIOReturnUnsupported);
- /* Compute the relative address of this virtual segment. */
- if (_task == kernel_task)
- return (void *)(_ranges.v[_positionAtIndex].address + _positionAtOffset);
- else
+ remaining = length = min(length, getLength() - offset);
+ while (remaining)
+ // (process another target segment?)
{
- vm_offset_t off;
+ addr64_t dstAddr64;
+ IOByteCount dstLen;
+
+ dstAddr64 = getPhysicalSegment64(offset, &dstLen);
+ if (!dstAddr64)
+ break;
- mapIntoKernel(_positionAtIndex);
+ // Clip segment length to remaining
+ if (dstLen > remaining)
+ dstLen = remaining;
- off = _ranges.v[_kernPtrAtIndex].address;
- off -= trunc_page(off);
+ (*func)(dstAddr64, dstLen);
- return (void *) (_kernPtrAligned + off + _positionAtOffset);
+ offset += dstLen;
+ remaining -= dstLen;
}
+
+ return (remaining ? kIOReturnUnderrun : kIOReturnSuccess);
}
-/*
- * prepare
- *
- * Prepare the memory for an I/O transfer. This involves paging in
- * the memory, if necessary, and wiring it down for the duration of
- * the transfer. The complete() method completes the processing of
- * the memory after the I/O transfer finishes. This method needn't
- * called for non-pageable memory.
- */
-IOReturn IOGeneralMemoryDescriptor::prepare(
- IODirection forDirection = kIODirectionNone)
+#ifdef __ppc__
+extern vm_offset_t static_memory_end;
+#define io_kernel_static_end static_memory_end
+#else
+extern vm_offset_t first_avail;
+#define io_kernel_static_end first_avail
+#endif
+
+static kern_return_t
+io_get_kernel_static_upl(
+ vm_map_t /* map */,
+ vm_address_t offset,
+ vm_size_t *upl_size,
+ upl_t *upl,
+ upl_page_info_array_t page_list,
+ unsigned int *count,
+ ppnum_t *highest_page)
{
- UInt rangeIndex = 0;
+ unsigned int pageCount, page;
+ ppnum_t phys;
+ ppnum_t highestPage = 0;
- if((_wireCount == 0) && (kIOMemoryRequiresWire & _flags)) {
- kern_return_t rc;
+ pageCount = atop_32(*upl_size);
+ if (pageCount > *count)
+ pageCount = *count;
- if(forDirection == kIODirectionNone)
- forDirection = _direction;
+ *upl = NULL;
- vm_prot_t access = VM_PROT_DEFAULT; // Could be cleverer using direction
+ for (page = 0; page < pageCount; page++)
+ {
+ phys = pmap_find_phys(kernel_pmap, ((addr64_t)offset) + ptoa_64(page));
+ if (!phys)
+ break;
+ page_list[page].phys_addr = phys;
+ page_list[page].pageout = 0;
+ page_list[page].absent = 0;
+ page_list[page].dirty = 0;
+ page_list[page].precious = 0;
+ page_list[page].device = 0;
+ if (phys > highestPage)
+ highestPage = page;
+ }
- //
- // Check user read/write access to the data buffer.
- //
+ *highest_page = highestPage;
- for (rangeIndex = 0; rangeIndex < _rangesCount; rangeIndex++)
- {
- vm_offset_t checkBase = trunc_page(_ranges.v[rangeIndex].address);
- vm_size_t checkSize = round_page(_ranges.v[rangeIndex].length );
+ return ((page >= pageCount) ? kIOReturnSuccess : kIOReturnVMError);
+}
- while (checkSize)
- {
- vm_region_basic_info_data_t regionInfo;
- mach_msg_type_number_t regionInfoSize = sizeof(regionInfo);
- vm_size_t regionSize;
-
- if ( (vm_region(
- /* map */ getMapForTask(_task, checkBase),
- /* address */ &checkBase,
- /* size */ ®ionSize,
- /* flavor */ VM_REGION_BASIC_INFO,
- /* info */ (vm_region_info_t) ®ionInfo,
- /* info size */ ®ionInfoSize,
- /* object name */ 0 ) != KERN_SUCCESS ) ||
- ( (forDirection & kIODirectionIn ) &&
- !(regionInfo.protection & VM_PROT_WRITE) ) ||
- ( (forDirection & kIODirectionOut) &&
- !(regionInfo.protection & VM_PROT_READ ) ) )
- {
- return kIOReturnVMError;
- }
+IOReturn IOGeneralMemoryDescriptor::wireVirtual(IODirection forDirection)
+{
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
+ IOReturn error = kIOReturnNoMemory;
+ ioGMDData *dataP;
+ ppnum_t mapBase = 0;
+ IOMapper *mapper;
+ ipc_port_t sharedMem = (ipc_port_t) _memEntry;
+
+ assert(!_wireCount);
+ assert(kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type);
- assert((regionSize & PAGE_MASK) == 0);
+ if (_pages >= gIOMaximumMappedIOPageCount)
+ return kIOReturnNoResources;
- regionSize = min(regionSize, checkSize);
- checkSize -= regionSize;
- checkBase += regionSize;
- } // (for each vm region)
- } // (for each io range)
+ dataP = getDataP(_memoryEntries);
+ mapper = dataP->fMapper;
+ if (mapper && _pages)
+ mapBase = mapper->iovmAlloc(_pages);
- for (rangeIndex = 0; rangeIndex < _rangesCount; rangeIndex++) {
+ // Note that appendBytes(NULL) zeros the data up to the
+ // desired length.
+ _memoryEntries->appendBytes(0, dataP->fPageCnt * sizeof(upl_page_info_t));
+ dataP = 0; // May no longer be valid so lets not get tempted.
- vm_offset_t srcAlign = trunc_page(_ranges.v[rangeIndex].address);
- IOByteCount srcAlignEnd = trunc_page(_ranges.v[rangeIndex].address +
- _ranges.v[rangeIndex].length +
- page_size - 1);
+ if (forDirection == kIODirectionNone)
+ forDirection = _direction;
- vm_map_t taskVMMap = getMapForTask(_task, srcAlign);
+ int uplFlags; // This Mem Desc's default flags for upl creation
+ switch (kIODirectionOutIn & forDirection)
+ {
+ case kIODirectionOut:
+ // Pages do not need to be marked as dirty on commit
+ uplFlags = UPL_COPYOUT_FROM;
+ _flags |= kIOMemoryPreparedReadOnly;
+ break;
+
+ case kIODirectionIn:
+ default:
+ uplFlags = 0; // i.e. ~UPL_COPYOUT_FROM
+ break;
+ }
+ uplFlags |= UPL_SET_IO_WIRE | UPL_SET_LITE;
+
+#ifdef UPL_NEED_32BIT_ADDR
+ if (kIODirectionPrepareToPhys32 & forDirection)
+ uplFlags |= UPL_NEED_32BIT_ADDR;
+#endif
- rc = vm_map_wire(taskVMMap, srcAlign, srcAlignEnd, access, FALSE);
- if (KERN_SUCCESS != rc) {
- IOLog("IOMemoryDescriptor::prepare vm_map_wire failed: %d\n", rc);
- goto abortExit;
+ // Find the appropriate vm_map for the given task
+ vm_map_t curMap;
+ if (_task == kernel_task && (kIOMemoryBufferPageable & _flags))
+ curMap = 0;
+ else
+ { curMap = get_task_map(_task); }
+
+ // Iterate over the vector of virtual ranges
+ Ranges vec = _ranges;
+ unsigned int pageIndex = 0;
+ IOByteCount mdOffset = 0;
+ ppnum_t highestPage = 0;
+ for (UInt range = 0; range < _rangesCount; range++) {
+ ioPLBlock iopl;
+ user_addr_t startPage;
+ IOByteCount numBytes;
+ ppnum_t highPage = 0;
+
+ // Get the startPage address and length of vec[range]
+ getAddrLenForInd(startPage, numBytes, type, vec, range);
+ iopl.fPageOffset = (short) startPage & PAGE_MASK;
+ numBytes += iopl.fPageOffset;
+ startPage = trunc_page_64(startPage);
+
+ if (mapper)
+ iopl.fMappedBase = mapBase + pageIndex;
+ else
+ iopl.fMappedBase = 0;
+
+ // Iterate over the current range, creating UPLs
+ while (numBytes) {
+ dataP = getDataP(_memoryEntries);
+ vm_address_t kernelStart = (vm_address_t) startPage;
+ vm_map_t theMap;
+ if (curMap)
+ theMap = curMap;
+ else if (!sharedMem) {
+ assert(_task == kernel_task);
+ theMap = IOPageableMapForAddress(kernelStart);
+ }
+ else
+ theMap = NULL;
+
+ upl_page_info_array_t pageInfo = getPageList(dataP);
+ int ioplFlags = uplFlags;
+ upl_page_list_ptr_t baseInfo = &pageInfo[pageIndex];
+
+ vm_size_t ioplSize = round_page_32(numBytes);
+ unsigned int numPageInfo = atop_32(ioplSize);
+
+ if (theMap == kernel_map && kernelStart < io_kernel_static_end) {
+ error = io_get_kernel_static_upl(theMap,
+ kernelStart,
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &highPage);
+ }
+ else if (sharedMem) {
+ error = memory_object_iopl_request(sharedMem,
+ ptoa_32(pageIndex),
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &ioplFlags);
+ }
+ else {
+ assert(theMap);
+ error = vm_map_create_upl(theMap,
+ startPage,
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &ioplFlags);
}
- // If this I/O is for a user land task then protect ourselves
- // against COW and other vm_shenanigans
- if (_task && _task != kernel_task) {
- // setup a data object to hold the 'named' memory regions
- // @@@ gvdl: If we fail to allocate an OSData we will just
- // hope for the best for the time being. Lets not fail a
- // prepare at this late stage in product release.
- if (!_memoryEntries)
- _memoryEntries = OSData::withCapacity(16);
- if (_memoryEntries) {
- vm_object_offset_t desiredSize = srcAlignEnd - srcAlign;
- vm_object_offset_t entryStart = srcAlign;
- ipc_port_t memHandle;
-
- do {
- vm_object_offset_t actualSize = desiredSize;
-
- rc = mach_make_memory_entry_64
- (taskVMMap, &actualSize, entryStart,
- forDirection, &memHandle, NULL);
- if (KERN_SUCCESS != rc) {
- IOLog("IOMemoryDescriptor::prepare mach_make_memory_entry_64 failed: %d\n", rc);
- goto abortExit;
- }
-
- _memoryEntries->
- appendBytes(&memHandle, sizeof(memHandle));
- desiredSize -= actualSize;
- entryStart += actualSize;
- } while (desiredSize);
+ assert(ioplSize);
+ if (error != KERN_SUCCESS)
+ goto abortExit;
+
+ if (iopl.fIOPL)
+ highPage = upl_get_highest_page(iopl.fIOPL);
+ if (highPage > highestPage)
+ highestPage = highPage;
+
+ error = kIOReturnNoMemory;
+
+ if (baseInfo->device) {
+ numPageInfo = 1;
+ iopl.fFlags = kIOPLOnDevice;
+ // Don't translate device memory at all
+ if (mapper && mapBase) {
+ mapper->iovmFree(mapBase, _pages);
+ mapBase = 0;
+ iopl.fMappedBase = 0;
}
+ }
+ else {
+ iopl.fFlags = 0;
+ if (mapper)
+ mapper->iovmInsert(mapBase, pageIndex,
+ baseInfo, numPageInfo);
+ }
+
+ iopl.fIOMDOffset = mdOffset;
+ iopl.fPageInfo = pageIndex;
+
+ if ((_flags & kIOMemoryAutoPrepare) && iopl.fIOPL)
+ {
+ upl_commit(iopl.fIOPL, 0, 0);
+ upl_deallocate(iopl.fIOPL);
+ iopl.fIOPL = 0;
}
+
+ if (!_memoryEntries->appendBytes(&iopl, sizeof(iopl))) {
+ // Clean up partial created and unsaved iopl
+ if (iopl.fIOPL) {
+ upl_abort(iopl.fIOPL, 0);
+ upl_deallocate(iopl.fIOPL);
+ }
+ goto abortExit;
+ }
+
+ // Check for a multiple iopl's in one virtual range
+ pageIndex += numPageInfo;
+ mdOffset -= iopl.fPageOffset;
+ if (ioplSize < numBytes) {
+ numBytes -= ioplSize;
+ startPage += ioplSize;
+ mdOffset += ioplSize;
+ iopl.fPageOffset = 0;
+ if (mapper)
+ iopl.fMappedBase = mapBase + pageIndex;
+ }
+ else {
+ mdOffset += numBytes;
+ break;
+ }
}
}
- _wireCount++;
- return kIOReturnSuccess;
-abortExit:
- UInt doneIndex;
+ _highestPage = highestPage;
+ return kIOReturnSuccess;
- for(doneIndex = 0; doneIndex < rangeIndex; doneIndex++) {
- vm_offset_t srcAlign = trunc_page(_ranges.v[doneIndex].address);
- IOByteCount srcAlignEnd = trunc_page(_ranges.v[doneIndex].address +
- _ranges.v[doneIndex].length +
- page_size - 1);
+abortExit:
+ {
+ dataP = getDataP(_memoryEntries);
+ UInt done = getNumIOPL(_memoryEntries, dataP);
+ ioPLBlock *ioplList = getIOPLList(dataP);
+
+ for (UInt range = 0; range < done; range++)
+ {
+ if (ioplList[range].fIOPL) {
+ upl_abort(ioplList[range].fIOPL, 0);
+ upl_deallocate(ioplList[range].fIOPL);
+ }
+ }
+ (void) _memoryEntries->initWithBytes(dataP, sizeof(ioGMDData)); // == setLength()
- vm_map_unwire(getMapForTask(_task, srcAlign), srcAlign,
- srcAlignEnd, FALSE);
+ if (mapper && mapBase)
+ mapper->iovmFree(mapBase, _pages);
}
- if (_memoryEntries) {
- ipc_port_t *handles, *handlesEnd;
+ return error;
+}
+
+/*
+ * prepare
+ *
+ * Prepare the memory for an I/O transfer. This involves paging in
+ * the memory, if necessary, and wiring it down for the duration of
+ * the transfer. The complete() method completes the processing of
+ * the memory after the I/O transfer finishes. This method needn't
+ * called for non-pageable memory.
+ */
+IOReturn IOGeneralMemoryDescriptor::prepare(IODirection forDirection)
+{
+ IOReturn error = kIOReturnSuccess;
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
- handles = (ipc_port_t *) _memoryEntries->getBytesNoCopy();
- handlesEnd = (ipc_port_t *)
- ((vm_address_t) handles + _memoryEntries->getLength());
- while (handles < handlesEnd)
- ipc_port_release_send(*handles++);
- _memoryEntries->release();
- _memoryEntries = 0;
+ if (!_wireCount
+ && (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type) ) {
+ error = wireVirtual(forDirection);
+ if (error)
+ return error;
}
- return kIOReturnVMError;
+ _wireCount++;
+
+ return kIOReturnSuccess;
}
/*
* before and after an I/O transfer involving pageable memory.
*/
-IOReturn IOGeneralMemoryDescriptor::complete(
- IODirection forDirection = kIODirectionNone)
+IOReturn IOGeneralMemoryDescriptor::complete(IODirection /* forDirection */)
{
assert(_wireCount);
- if(0 == _wireCount)
+ if (!_wireCount)
return kIOReturnSuccess;
_wireCount--;
- if((_wireCount == 0) && (kIOMemoryRequiresWire & _flags)) {
- UInt rangeIndex;
- kern_return_t rc;
-
- if(forDirection == kIODirectionNone)
- forDirection = _direction;
-
- for(rangeIndex = 0; rangeIndex < _rangesCount; rangeIndex++) {
-
- vm_offset_t srcAlign = trunc_page(_ranges.v[rangeIndex].address);
- IOByteCount srcAlignEnd = trunc_page(_ranges.v[rangeIndex].address +
- _ranges.v[rangeIndex].length +
- page_size - 1);
+ if (!_wireCount) {
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
- if(forDirection == kIODirectionIn)
- pmap_modify_pages(get_task_pmap(_task), srcAlign, srcAlignEnd);
-
- rc = vm_map_unwire(getMapForTask(_task, srcAlign), srcAlign,
- srcAlignEnd, FALSE);
- if(rc != KERN_SUCCESS)
- IOLog("IOMemoryDescriptor::complete: vm_map_unwire failed: %d\n", rc);
+ if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type)) {
+ /* kIOMemoryTypePhysical */
+ // DO NOTHING
}
+ else {
+ ioGMDData * dataP = getDataP(_memoryEntries);
+ ioPLBlock *ioplList = getIOPLList(dataP);
+ UInt count = getNumIOPL(_memoryEntries, dataP);
+
+ if (dataP->fMapper && _pages && ioplList[0].fMappedBase)
+ dataP->fMapper->iovmFree(ioplList[0].fMappedBase, _pages);
+
+ // Only complete iopls that we created which are for TypeVirtual
+ if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type) {
+ for (UInt ind = 0; ind < count; ind++)
+ if (ioplList[ind].fIOPL) {
+ upl_commit(ioplList[ind].fIOPL, 0, 0);
+ upl_deallocate(ioplList[ind].fIOPL);
+ }
+ }
- if (_memoryEntries) {
- ipc_port_t *handles, *handlesEnd;
-
- handles = (ipc_port_t *) _memoryEntries->getBytesNoCopy();
- handlesEnd = (ipc_port_t *)
- ((vm_address_t) handles + _memoryEntries->getLength());
- while (handles < handlesEnd)
- ipc_port_release_send(*handles++);
-
- _memoryEntries->release();
- _memoryEntries = 0;
- }
-
- _cachedVirtualAddress = 0;
+ (void) _memoryEntries->initWithBytes(dataP, sizeof(ioGMDData)); // == setLength()
+ }
}
return kIOReturnSuccess;
}
vm_map_t addressMap,
IOVirtualAddress * atAddress,
IOOptionBits options,
- IOByteCount sourceOffset = 0,
- IOByteCount length = 0 )
+ IOByteCount sourceOffset,
+ IOByteCount length )
{
kern_return_t kr;
+ ipc_port_t sharedMem = (ipc_port_t) _memEntry;
+
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
+ Ranges vec = _ranges;
+
+ user_addr_t range0Addr = 0;
+ IOByteCount range0Len = 0;
+
+ if (vec.v)
+ getAddrLenForInd(range0Addr, range0Len, type, vec, 0);
// mapping source == dest? (could be much better)
- if( _task && (addressMap == get_task_map(_task)) && (options & kIOMapAnywhere)
- && (1 == _rangesCount) && (0 == sourceOffset)
- && (length <= _ranges.v[0].length) ) {
- *atAddress = _ranges.v[0].address;
+ if( _task
+ && (addressMap == get_task_map(_task)) && (options & kIOMapAnywhere)
+ && (1 == _rangesCount) && (0 == sourceOffset)
+ && range0Addr && (length <= range0Len) ) {
+ if (sizeof(user_addr_t) > 4 && ((UInt64) range0Addr) >> 32)
+ return kIOReturnOverrun; // Doesn't fit in 32bit return field
+ else {
+ *atAddress = range0Addr;
return( kIOReturnSuccess );
+ }
}
- if( _task && _memEntry && (_flags & kIOMemoryRequiresWire)) {
+ if( 0 == sharedMem) {
- do {
+ vm_size_t size = ptoa_32(_pages);
- if( (1 != _rangesCount)
- || (kIOMapDefaultCache != (options & kIOMapCacheMask)) ) {
- kr = kIOReturnUnsupported;
- continue;
- }
+ if( _task) {
- if( 0 == length)
- length = getLength();
- if( (sourceOffset + length) > _ranges.v[0].length) {
- kr = kIOReturnBadArgument;
- continue;
+ memory_object_size_t actualSize = size;
+ kr = mach_make_memory_entry_64(get_task_map(_task),
+ &actualSize, range0Addr,
+ VM_PROT_READ | VM_PROT_WRITE, &sharedMem,
+ NULL );
+
+ if( (KERN_SUCCESS == kr) && (actualSize != round_page_32(size))) {
+#if IOASSERT
+ IOLog("mach_make_memory_entry_64 (%08llx) size (%08lx:%08x)\n",
+ range0Addr, (UInt32) actualSize, size);
+#endif
+ kr = kIOReturnVMError;
+ ipc_port_release_send( sharedMem );
}
- ipc_port_t sharedMem = (ipc_port_t) _memEntry;
- vm_prot_t prot = VM_PROT_READ
- | ((options & kIOMapReadOnly) ? 0 : VM_PROT_WRITE);
+ if( KERN_SUCCESS != kr)
+ sharedMem = MACH_PORT_NULL;
- // vm_map looks for addresses above here, even when VM_FLAGS_ANYWHERE
- if( options & kIOMapAnywhere)
- *atAddress = 0;
+ } else do { // _task == 0, must be physical
- if( 0 == sharedMem)
- kr = kIOReturnVMError;
- else
- kr = KERN_SUCCESS;
-
- if( KERN_SUCCESS == kr)
- kr = vm_map( addressMap,
- atAddress,
- length, 0 /* mask */,
- (( options & kIOMapAnywhere ) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
- | VM_MAKE_TAG(VM_MEMORY_IOKIT),
- sharedMem, sourceOffset,
- false, // copy
- prot, // cur
- prot, // max
- VM_INHERIT_NONE);
-
- } while( false );
+ memory_object_t pager;
+ unsigned int flags = 0;
+ addr64_t pa;
+ IOPhysicalLength segLen;
- } else
- kr = super::doMap( addressMap, atAddress,
- options, sourceOffset, length );
- return( kr );
-}
+ pa = getPhysicalSegment64( sourceOffset, &segLen );
-IOReturn IOGeneralMemoryDescriptor::doUnmap(
- vm_map_t addressMap,
- IOVirtualAddress logical,
- IOByteCount length )
-{
- // could be much better
- if( _task && (addressMap == getMapForTask(_task, _ranges.v[0].address)) && (1 == _rangesCount)
- && (logical == _ranges.v[0].address)
- && (length <= _ranges.v[0].length) )
- return( kIOReturnSuccess );
+ if( !reserved) {
+ reserved = IONew( ExpansionData, 1 );
+ if( !reserved)
+ continue;
+ }
+ reserved->pagerContig = (1 == _rangesCount);
+ reserved->memory = this;
- return( super::doUnmap( addressMap, logical, length ));
-}
+ /*What cache mode do we need*/
+ switch(options & kIOMapCacheMask ) {
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+ case kIOMapDefaultCache:
+ default:
+ flags = IODefaultCacheBits(pa);
+ break;
+
+ case kIOMapInhibitCache:
+ flags = DEVICE_PAGER_CACHE_INHIB |
+ DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
+ break;
+
+ case kIOMapWriteThruCache:
+ flags = DEVICE_PAGER_WRITE_THROUGH |
+ DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
+ break;
-extern "C" {
-// osfmk/device/iokit_rpc.c
-extern kern_return_t IOMapPages( vm_map_t map, vm_offset_t va, vm_offset_t pa,
- vm_size_t length, unsigned int mapFlags);
-extern kern_return_t IOUnmapPages(vm_map_t map, vm_offset_t va, vm_size_t length);
-};
+ case kIOMapCopybackCache:
+ flags = DEVICE_PAGER_COHERENT;
+ break;
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+ case kIOMapWriteCombineCache:
+ flags = DEVICE_PAGER_CACHE_INHIB |
+ DEVICE_PAGER_COHERENT;
+ break;
+ }
-static IORecursiveLock * gIOMemoryLock;
+ flags |= reserved->pagerContig ? DEVICE_PAGER_CONTIGUOUS : 0;
-#define LOCK IORecursiveLockLock( gIOMemoryLock)
-#define UNLOCK IORecursiveLockUnlock( gIOMemoryLock)
+ pager = device_pager_setup( (memory_object_t) 0, (int) reserved,
+ size, flags);
+ assert( pager );
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+ if( pager) {
+ kr = mach_memory_object_memory_entry_64( (host_t) 1, false /*internal*/,
+ size, VM_PROT_READ | VM_PROT_WRITE, pager, &sharedMem );
-OSDefineMetaClass( IOMemoryMap, OSObject )
-OSDefineAbstractStructors( IOMemoryMap, OSObject )
+ assert( KERN_SUCCESS == kr );
+ if( KERN_SUCCESS != kr) {
+ device_pager_deallocate( pager );
+ pager = MACH_PORT_NULL;
+ sharedMem = MACH_PORT_NULL;
+ }
+ }
+ if( pager && sharedMem)
+ reserved->devicePager = pager;
+ else {
+ IODelete( reserved, ExpansionData, 1 );
+ reserved = 0;
+ }
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+ } while( false );
-class _IOMemoryMap : public IOMemoryMap
-{
- OSDeclareDefaultStructors(_IOMemoryMap)
+ _memEntry = (void *) sharedMem;
+ }
- IOMemoryDescriptor * memory;
- IOMemoryMap * superMap;
- IOByteCount offset;
- IOByteCount length;
- IOVirtualAddress logical;
- task_t addressTask;
- vm_map_t addressMap;
- IOOptionBits options;
-public:
- virtual void free();
+ if( 0 == sharedMem)
+ kr = kIOReturnVMError;
+ else
+ kr = super::doMap( addressMap, atAddress,
+ options, sourceOffset, length );
- // IOMemoryMap methods
- virtual IOVirtualAddress getVirtualAddress();
- virtual IOByteCount getLength();
- virtual task_t getAddressTask();
- virtual IOMemoryDescriptor * getMemoryDescriptor();
- virtual IOOptionBits getMapOptions();
+ return( kr );
+}
- virtual IOReturn unmap();
- virtual void taskDied();
+IOReturn IOGeneralMemoryDescriptor::doUnmap(
+ vm_map_t addressMap,
+ IOVirtualAddress logical,
+ IOByteCount length )
+{
+ // could be much better
+ if( _task && (addressMap == get_task_map(_task)) && (1 == _rangesCount)) {
- virtual IOPhysicalAddress getPhysicalSegment(IOByteCount offset,
- IOByteCount * length);
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
+ user_addr_t range0Addr;
+ IOByteCount range0Len;
- // for IOMemoryDescriptor use
- _IOMemoryMap * isCompatible(
- IOMemoryDescriptor * owner,
- task_t intoTask,
- IOVirtualAddress toAddress,
- IOOptionBits options,
- IOByteCount offset,
- IOByteCount length );
+ getAddrLenForInd(range0Addr, range0Len, type, _ranges, 0);
+ if (logical == range0Addr && length <= range0Len)
+ return( kIOReturnSuccess );
+ }
- bool init(
- IOMemoryDescriptor * memory,
- IOMemoryMap * superMap,
- IOByteCount offset,
- IOByteCount length );
+ return( super::doUnmap( addressMap, logical, length ));
+}
- bool init(
- IOMemoryDescriptor * memory,
- task_t intoTask,
- IOVirtualAddress toAddress,
- IOOptionBits options,
- IOByteCount offset,
- IOByteCount length );
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
- IOReturn redirect(
- task_t intoTask, bool redirect );
-};
+OSDefineMetaClassAndAbstractStructors( IOMemoryMap, OSObject )
+
+/* inline function implementation */
+IOPhysicalAddress IOMemoryMap::getPhysicalAddress()
+ { return( getPhysicalSegment( 0, 0 )); }
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#undef super
#define super IOMemoryMap
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-bool _IOMemoryMap::init(
+bool _IOMemoryMap::initCompatible(
IOMemoryDescriptor * _memory,
IOMemoryMap * _superMap,
IOByteCount _offset,
return( true );
}
-bool _IOMemoryMap::init(
+bool _IOMemoryMap::initWithDescriptor(
IOMemoryDescriptor * _memory,
task_t intoTask,
IOVirtualAddress toAddress,
IOByteCount _offset,
IOByteCount _length )
{
- bool ok;
+ bool ok;
+ bool redir = ((kIOMapUnique|kIOMapReference) == ((kIOMapUnique|kIOMapReference) & _options));
- if( (!_memory) || (!intoTask) || !super::init())
+ if ((!_memory) || (!intoTask))
return( false);
if( (_offset + _length) > _memory->getLength())
return( false);
- addressMap = get_task_map(intoTask);
- if( !addressMap)
- return( false);
- kernel_vm_map_reference(addressMap);
+ if (!redir)
+ {
+ if (!super::init())
+ return(false);
+ addressMap = get_task_map(intoTask);
+ if( !addressMap)
+ return( false);
+ vm_map_reference(addressMap);
+ addressTask = intoTask;
+ logical = toAddress;
+ options = _options;
+ }
_memory->retain();
- memory = _memory;
offset = _offset;
if( _length)
else
length = _memory->getLength();
- addressTask = intoTask;
- logical = toAddress;
- options = _options;
-
if( options & kIOMapStatic)
ok = true;
else
- ok = (kIOReturnSuccess == memory->doMap( addressMap, &logical,
- options, offset, length ));
- if( !ok) {
- logical = 0;
- memory->release();
- memory = 0;
- vm_map_deallocate(addressMap);
- addressMap = 0;
+ ok = (kIOReturnSuccess == _memory->doMap( addressMap, &toAddress,
+ _options, offset, length ));
+ if (ok || redir)
+ {
+ if (memory)
+ memory->release();
+ memory = _memory;
+ logical = toAddress;
+ }
+ else
+ {
+ _memory->release();
+ if (!redir)
+ {
+ logical = 0;
+ memory = 0;
+ vm_map_deallocate(addressMap);
+ addressMap = 0;
+ }
}
+
return( ok );
}
+/* LP64todo - these need to expand */
+struct IOMemoryDescriptorMapAllocRef
+{
+ ipc_port_t sharedMem;
+ vm_size_t size;
+ vm_offset_t mapped;
+ IOByteCount sourceOffset;
+ IOOptionBits options;
+};
+
+static kern_return_t IOMemoryDescriptorMapAlloc(vm_map_t map, void * _ref)
+{
+ IOMemoryDescriptorMapAllocRef * ref = (IOMemoryDescriptorMapAllocRef *)_ref;
+ IOReturn err;
+
+ do {
+ if( ref->sharedMem) {
+ vm_prot_t prot = VM_PROT_READ
+ | ((ref->options & kIOMapReadOnly) ? 0 : VM_PROT_WRITE);
+
+ // set memory entry cache
+ vm_prot_t memEntryCacheMode = prot | MAP_MEM_ONLY;
+ switch (ref->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;
+ }
+
+ vm_size_t unused = 0;
+
+ err = mach_make_memory_entry( NULL /*unused*/, &unused, 0 /*unused*/,
+ memEntryCacheMode, NULL, ref->sharedMem );
+ if (KERN_SUCCESS != err)
+ IOLog("MAP_MEM_ONLY failed %d\n", err);
+
+ err = vm_map( map,
+ &ref->mapped,
+ ref->size, 0 /* mask */,
+ (( ref->options & kIOMapAnywhere ) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
+ | VM_MAKE_TAG(VM_MEMORY_IOKIT),
+ ref->sharedMem, ref->sourceOffset,
+ false, // copy
+ prot, // cur
+ prot, // max
+ VM_INHERIT_NONE);
+
+ if( KERN_SUCCESS != err) {
+ ref->mapped = 0;
+ continue;
+ }
+
+ } else {
+
+ err = vm_allocate( map, &ref->mapped, ref->size,
+ ((ref->options & kIOMapAnywhere) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
+ | VM_MAKE_TAG(VM_MEMORY_IOKIT) );
+
+ if( KERN_SUCCESS != err) {
+ ref->mapped = 0;
+ continue;
+ }
+
+ // we have to make sure that these guys don't get copied if we fork.
+ err = vm_inherit( map, ref->mapped, ref->size, VM_INHERIT_NONE);
+ assert( KERN_SUCCESS == err );
+ }
+
+ } while( false );
+
+ return( err );
+}
+
+
IOReturn IOMemoryDescriptor::doMap(
vm_map_t addressMap,
IOVirtualAddress * atAddress,
IOOptionBits options,
- IOByteCount sourceOffset = 0,
- IOByteCount length = 0 )
+ IOByteCount sourceOffset,
+ IOByteCount length )
{
IOReturn err = kIOReturnSuccess;
- vm_size_t ourSize;
- vm_size_t bytes;
- vm_offset_t mapped;
+ memory_object_t pager;
vm_address_t logical;
IOByteCount pageOffset;
- IOPhysicalLength segLen;
- IOPhysicalAddress physAddr;
+ IOPhysicalAddress sourceAddr;
+ IOMemoryDescriptorMapAllocRef ref;
- if( 0 == length)
- length = getLength();
+ ref.sharedMem = (ipc_port_t) _memEntry;
+ ref.sourceOffset = sourceOffset;
+ ref.options = options;
- physAddr = getPhysicalSegment( sourceOffset, &segLen );
- assert( physAddr );
+ do {
- pageOffset = physAddr - trunc_page( physAddr );
- ourSize = length + pageOffset;
- physAddr -= pageOffset;
+ if( 0 == length)
+ length = getLength();
- logical = *atAddress;
- if( 0 == (options & kIOMapAnywhere)) {
- mapped = trunc_page( logical );
- if( (logical - mapped) != pageOffset)
- err = kIOReturnVMError;
- }
- if( kIOReturnSuccess == err)
- err = vm_allocate( addressMap, &mapped, ourSize,
- ((options & kIOMapAnywhere) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
- | VM_MAKE_TAG(VM_MEMORY_IOKIT) );
+ sourceAddr = getSourceSegment( sourceOffset, NULL );
+ pageOffset = sourceAddr - trunc_page_32( sourceAddr );
+
+ ref.size = round_page_32( length + pageOffset );
+
+ if ((kIOMapReference|kIOMapUnique) == ((kIOMapReference|kIOMapUnique) & options))
+ {
+ upl_t redirUPL2;
+ vm_size_t size;
+ int flags;
+
+ _IOMemoryMap * mapping = (_IOMemoryMap *) *atAddress;
+ ref.mapped = mapping->getVirtualAddress();
+
+ if (!_memEntry)
+ {
+ err = kIOReturnNotReadable;
+ continue;
+ }
+
+ size = length;
+ flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
+ | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS;
+
+ if (KERN_SUCCESS != memory_object_iopl_request((ipc_port_t) _memEntry, 0, &size, &redirUPL2,
+ NULL, NULL,
+ &flags))
+ redirUPL2 = NULL;
+
+ err = upl_transpose(redirUPL2, mapping->redirUPL);
+ if (kIOReturnSuccess != err)
+ {
+ IOLog("upl_transpose(%x)\n", err);
+ err = kIOReturnSuccess;
+ }
+
+ if (redirUPL2)
+ {
+ upl_commit(redirUPL2, NULL, 0);
+ upl_deallocate(redirUPL2);
+ redirUPL2 = 0;
+ }
+ {
+ // swap the memEntries since they now refer to different vm_objects
+ void * me = _memEntry;
+ _memEntry = mapping->memory->_memEntry;
+ mapping->memory->_memEntry = me;
+ }
+ }
+ else
+ {
+
+ logical = *atAddress;
+ if( options & kIOMapAnywhere)
+ // vm_map looks for addresses above here, even when VM_FLAGS_ANYWHERE
+ ref.mapped = 0;
+ else {
+ ref.mapped = trunc_page_32( logical );
+ if( (logical - ref.mapped) != pageOffset) {
+ err = kIOReturnVMError;
+ continue;
+ }
+ }
+
+ if( ref.sharedMem && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
+ err = IOIteratePageableMaps( ref.size, &IOMemoryDescriptorMapAlloc, &ref );
+ else
+ err = IOMemoryDescriptorMapAlloc( addressMap, &ref );
+ }
+
+ if( err != KERN_SUCCESS)
+ continue;
+
+ if( reserved)
+ pager = (memory_object_t) reserved->devicePager;
+ else
+ pager = MACH_PORT_NULL;
+
+ if( !ref.sharedMem || pager )
+ err = handleFault( pager, addressMap, ref.mapped, sourceOffset, length, options );
+
+ } while( false );
+
+ if( err != KERN_SUCCESS) {
+ if( ref.mapped)
+ doUnmap( addressMap, ref.mapped, ref.size );
+ *atAddress = NULL;
+ } else
+ *atAddress = ref.mapped + pageOffset;
- if( err) {
+ return( err );
+}
+
+enum {
+ kIOMemoryRedirected = 0x00010000
+};
+
+IOReturn IOMemoryDescriptor::handleFault(
+ void * _pager,
+ vm_map_t addressMap,
+ IOVirtualAddress address,
+ IOByteCount sourceOffset,
+ IOByteCount length,
+ IOOptionBits options )
+{
+ IOReturn err = kIOReturnSuccess;
+ memory_object_t pager = (memory_object_t) _pager;
+ vm_size_t size;
+ vm_size_t bytes;
+ vm_size_t page;
+ IOByteCount pageOffset;
+ IOByteCount pagerOffset;
+ IOPhysicalLength segLen;
+ addr64_t physAddr;
+
+ if( !addressMap) {
+
+ if( kIOMemoryRedirected & _flags) {
#ifdef DEBUG
- kprintf("IOMemoryDescriptor::doMap: vm_allocate() "
- "returned %08x\n", err);
+ IOLog("sleep mem redirect %p, %lx\n", this, sourceOffset);
#endif
- return( err);
- }
+ do {
+ SLEEP;
+ } while( kIOMemoryRedirected & _flags );
+ }
- // we have to make sure that these guys don't get copied if we fork.
- err = vm_inherit( addressMap, mapped, ourSize, VM_INHERIT_NONE);
- if( err != KERN_SUCCESS) {
- doUnmap( addressMap, mapped, ourSize); // back out
- return( err);
+ return( kIOReturnSuccess );
}
- logical = mapped;
- *atAddress = mapped + pageOffset;
+ physAddr = getPhysicalSegment64( sourceOffset, &segLen );
+ assert( physAddr );
+ pageOffset = physAddr - trunc_page_64( physAddr );
+ pagerOffset = sourceOffset;
+
+ size = length + pageOffset;
+ physAddr -= pageOffset;
segLen += pageOffset;
- bytes = ourSize;
+ bytes = size;
do {
// in the middle of the loop only map whole pages
if( segLen >= bytes)
segLen = bytes;
- else if( segLen != trunc_page( segLen))
+ else if( segLen != trunc_page_32( segLen))
err = kIOReturnVMError;
- if( physAddr != trunc_page( physAddr))
+ if( physAddr != trunc_page_64( physAddr))
err = kIOReturnBadArgument;
#ifdef DEBUG
if( kIOLogMapping & gIOKitDebug)
- kprintf("_IOMemoryMap::map(%x) %08x->%08x:%08x\n",
- addressMap, mapped + pageOffset, physAddr + pageOffset,
+ IOLog("_IOMemoryMap::map(%p) %08lx->%08qx:%08lx\n",
+ addressMap, address + pageOffset, physAddr + pageOffset,
segLen - pageOffset);
#endif
- if( kIOReturnSuccess == err)
- err = IOMapPages( addressMap, mapped, physAddr, segLen, options );
- if( err)
- break;
+ if( pager) {
+ if( reserved && reserved->pagerContig) {
+ IOPhysicalLength allLen;
+ addr64_t allPhys;
+
+ allPhys = getPhysicalSegment64( 0, &allLen );
+ assert( allPhys );
+ err = device_pager_populate_object( pager, 0, allPhys >> PAGE_SHIFT, round_page_32(allLen) );
+
+ } else {
+
+ for( page = 0;
+ (page < segLen) && (KERN_SUCCESS == err);
+ page += page_size) {
+ err = device_pager_populate_object(pager, pagerOffset,
+ (ppnum_t)((physAddr + page) >> PAGE_SHIFT), page_size);
+ pagerOffset += page_size;
+ }
+ }
+ assert( KERN_SUCCESS == err );
+ if( err)
+ break;
+ }
+
+ /* *** ALERT *** */
+ /* *** Temporary Workaround *** */
+
+ /* This call to vm_fault causes an early pmap level resolution */
+ /* of the mappings created above. Need for this is in absolute */
+ /* violation of the basic tenet that the pmap layer is a cache. */
+ /* Further, it implies a serious I/O architectural violation on */
+ /* the part of some user of the mapping. As of this writing, */
+ /* the call to vm_fault is needed because the NVIDIA driver */
+ /* makes a call to pmap_extract. The NVIDIA driver needs to be */
+ /* fixed as soon as possible. The NVIDIA driver should not */
+ /* need to query for this info as it should know from the doMap */
+ /* call where the physical memory is mapped. When a query is */
+ /* necessary to find a physical mapping, it should be done */
+ /* through an iokit call which includes the mapped memory */
+ /* handle. This is required for machine architecture independence.*/
+
+ if(!(kIOMemoryRedirected & _flags)) {
+ vm_fault(addressMap,
+ (vm_map_offset_t)address,
+ VM_PROT_READ|VM_PROT_WRITE,
+ FALSE, THREAD_UNINT, NULL,
+ (vm_map_offset_t)0);
+ }
+
+ /* *** Temporary Workaround *** */
+ /* *** ALERT *** */
sourceOffset += segLen - pageOffset;
- mapped += segLen;
+ address += segLen;
bytes -= segLen;
pageOffset = 0;
} while( bytes
- && (physAddr = getPhysicalSegment( sourceOffset, &segLen )));
+ && (physAddr = getPhysicalSegment64( sourceOffset, &segLen )));
if( bytes)
err = kIOReturnBadArgument;
- if( err)
- doUnmap( addressMap, logical, ourSize );
- else
- mapped = true;
return( err );
}
addressMap, logical, length );
#endif
- if( (addressMap == kernel_map) || (addressMap == get_task_map(current_task())))
+ if( true /* && (addressMap == kernel_map) || (addressMap == get_task_map(current_task()))*/) {
+
+ if( _memEntry && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
+ addressMap = IOPageableMapForAddress( logical );
+
err = vm_deallocate( addressMap, logical, length );
- else
+
+ } else
err = kIOReturnSuccess;
return( err );
}
-IOReturn IOMemoryDescriptor::redirect( task_t safeTask, bool redirect )
+IOReturn IOMemoryDescriptor::redirect( task_t safeTask, bool doRedirect )
{
- IOReturn err;
+ IOReturn err = kIOReturnSuccess;
_IOMemoryMap * mapping = 0;
OSIterator * iter;
LOCK;
+ if( doRedirect)
+ _flags |= kIOMemoryRedirected;
+ else
+ _flags &= ~kIOMemoryRedirected;
+
do {
if( (iter = OSCollectionIterator::withCollection( _mappings))) {
- while( (mapping = (_IOMemoryMap *) iter->getNextObject()))
- mapping->redirect( safeTask, redirect );
+ while( (mapping = (_IOMemoryMap *) iter->getNextObject()))
+ mapping->redirect( safeTask, doRedirect );
- iter->release();
- }
+ iter->release();
+ }
} while( false );
+ if (!doRedirect)
+ {
+ WAKEUP;
+ }
+
UNLOCK;
// temporary binary compatibility
IOSubMemoryDescriptor * subMem;
if( (subMem = OSDynamicCast( IOSubMemoryDescriptor, this)))
- err = subMem->redirect( safeTask, redirect );
+ err = subMem->redirect( safeTask, doRedirect );
else
- err = kIOReturnSuccess;
+ err = kIOReturnSuccess;
return( err );
}
-IOReturn IOSubMemoryDescriptor::redirect( task_t safeTask, bool redirect )
+IOReturn IOSubMemoryDescriptor::redirect( task_t safeTask, bool doRedirect )
{
-// temporary binary compatibility IOMemoryDescriptor::redirect( safeTask, redirect );
- return( _parent->redirect( safeTask, redirect ));
+ return( _parent->redirect( safeTask, doRedirect ));
}
-IOReturn _IOMemoryMap::redirect( task_t safeTask, bool redirect )
+IOReturn _IOMemoryMap::redirect( task_t safeTask, bool doRedirect )
{
IOReturn err = kIOReturnSuccess;
if( superMap) {
-// err = ((_IOMemoryMap *)superMap)->redirect( safeTask, redirect );
+// err = ((_IOMemoryMap *)superMap)->redirect( safeTask, doRedirect );
} else {
LOCK;
- if( logical && addressMap
- && (get_task_map( safeTask) != addressMap)
- && (0 == (options & kIOMapStatic))) {
-
- IOUnmapPages( addressMap, logical, length );
- if( !redirect) {
- err = vm_deallocate( addressMap, logical, length );
- err = memory->doMap( addressMap, &logical,
- (options & ~kIOMapAnywhere) /*| kIOMapReserve*/ );
- } else
- err = kIOReturnSuccess;
+
+ do
+ {
+ if (!logical)
+ break;
+ if (!addressMap)
+ break;
+
+ if ((!safeTask || (get_task_map(safeTask) != addressMap))
+ && (0 == (options & kIOMapStatic)))
+ {
+ IOUnmapPages( addressMap, logical, length );
+ if(!doRedirect && safeTask
+ && (((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
+ || ((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64)))
+ {
+ err = vm_deallocate( addressMap, logical, length );
+ err = memory->doMap( addressMap, &logical,
+ (options & ~kIOMapAnywhere) /*| kIOMapReserve*/,
+ offset, length );
+ } else
+ err = kIOReturnSuccess;
#ifdef DEBUG
- IOLog("IOMemoryMap::redirect(%d, %x) %x from %lx\n", redirect, err, logical, addressMap);
+ IOLog("IOMemoryMap::redirect(%d, %p) %x:%lx from %p\n", doRedirect, this, logical, length, addressMap);
#endif
- }
- UNLOCK;
+ }
+ else if (kIOMapWriteCombineCache == (options & kIOMapCacheMask))
+ {
+ IOOptionBits newMode;
+ newMode = (options & ~kIOMapCacheMask) | (doRedirect ? kIOMapInhibitCache : kIOMapWriteCombineCache);
+ IOProtectCacheMode(addressMap, logical, length, newMode);
+ }
+ }
+ while (false);
+
+ UNLOCK;
}
+ if ((((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
+ || ((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64))
+ && safeTask
+ && (doRedirect != (0 != (memory->_flags & kIOMemoryRedirected))))
+ memory->redirect(safeTask, doRedirect);
+
return( err );
}
UNLOCK;
}
+// Overload the release mechanism. All mappings must be a member
+// of a memory descriptors _mappings set. This means that we
+// always have 2 references on a mapping. When either of these mappings
+// are released we need to free ourselves.
+void _IOMemoryMap::taggedRelease(const void *tag) const
+{
+ LOCK;
+ super::taggedRelease(tag, 2);
+ UNLOCK;
+}
+
void _IOMemoryMap::free()
{
unmap();
memory->release();
}
+ if (owner && (owner != memory))
+ {
+ LOCK;
+ owner->removeMapping(this);
+ UNLOCK;
+ }
+
if( superMap)
superMap->release();
+ if (redirUPL) {
+ upl_commit(redirUPL, NULL, 0);
+ upl_deallocate(redirUPL);
+ }
+
super::free();
}
return( memory );
}
-_IOMemoryMap * _IOMemoryMap::isCompatible(
+_IOMemoryMap * _IOMemoryMap::copyCompatible(
IOMemoryDescriptor * owner,
task_t task,
IOVirtualAddress toAddress,
{
_IOMemoryMap * mapping;
- if( (!task) || (task != getAddressTask()))
+ if( (!task) || (!addressMap) || (addressMap != get_task_map(task)))
+ return( 0 );
+ if( options & kIOMapUnique)
return( 0 );
- if( (options ^ _options) & (kIOMapCacheMask | kIOMapReadOnly))
+ if( (options ^ _options) & kIOMapReadOnly)
+ return( 0 );
+ if( (kIOMapDefaultCache != (_options & kIOMapCacheMask))
+ && ((options ^ _options) & kIOMapCacheMask))
return( 0 );
if( (0 == (_options & kIOMapAnywhere)) && (logical != toAddress))
} else {
mapping = new _IOMemoryMap;
if( mapping
- && !mapping->init( owner, this, _offset, _length )) {
+ && !mapping->initCompatible( owner, this, _offset, _length )) {
mapping->release();
mapping = 0;
}
return( mapping );
}
-IOPhysicalAddress _IOMemoryMap::getPhysicalSegment( IOByteCount _offset,
- IOPhysicalLength * length)
+IOPhysicalAddress
+_IOMemoryMap::getPhysicalSegment( IOByteCount _offset, IOPhysicalLength * _length)
{
IOPhysicalAddress address;
LOCK;
- address = memory->getPhysicalSegment( offset + _offset, length );
+ address = memory->getPhysicalSegment( offset + _offset, _length );
UNLOCK;
return( address );
{
if( 0 == gIOMemoryLock)
gIOMemoryLock = IORecursiveLockAlloc();
+
+ IORegistryEntry::getRegistryRoot()->setProperty(kIOMaximumMappedIOByteCountKey,
+ ptoa_64(gIOMaximumMappedIOPageCount), 64);
+ if (!gIOCopyMapper)
+ {
+ IOMapper *
+ mapper = new IOCopyMapper;
+ if (mapper)
+ {
+ if (mapper->init() && mapper->start(NULL))
+ gIOCopyMapper = (IOCopyMapper *) mapper;
+ else
+ mapper->release();
+ }
+ }
+
+ gIOLastPage = IOGetLastPageNumber();
}
void IOMemoryDescriptor::free( void )
IOMemoryMap * IOMemoryDescriptor::setMapping(
task_t intoTask,
IOVirtualAddress mapAddress,
- IOOptionBits options = 0 )
+ IOOptionBits options )
{
- _IOMemoryMap * map;
+ _IOMemoryMap * newMap;
- map = new _IOMemoryMap;
+ newMap = new _IOMemoryMap;
LOCK;
- if( map
- && !map->init( this, intoTask, mapAddress,
+ if( newMap
+ && !newMap->initWithDescriptor( this, intoTask, mapAddress,
options | kIOMapStatic, 0, getLength() )) {
- map->release();
- map = 0;
+ newMap->release();
+ newMap = 0;
}
- addMapping( map);
+ addMapping( newMap);
UNLOCK;
- return( map);
+ return( newMap);
}
IOMemoryMap * IOMemoryDescriptor::map(
- IOOptionBits options = 0 )
+ IOOptionBits options )
{
return( makeMapping( this, kernel_task, 0,
task_t intoTask,
IOVirtualAddress toAddress,
IOOptionBits options,
- IOByteCount offset = 0,
- IOByteCount length = 0 )
+ IOByteCount offset,
+ IOByteCount length )
{
if( 0 == length)
length = getLength();
return( makeMapping( this, intoTask, toAddress, options, offset, length ));
}
+IOReturn _IOMemoryMap::redirect(IOMemoryDescriptor * newBackingMemory,
+ IOOptionBits options,
+ IOByteCount offset)
+{
+ IOReturn err = kIOReturnSuccess;
+ IOMemoryDescriptor * physMem = 0;
+
+ LOCK;
+
+ if (logical && addressMap) do
+ {
+ if (((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
+ || ((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64))
+ {
+ physMem = memory;
+ physMem->retain();
+ }
+
+ if (!redirUPL)
+ {
+ vm_size_t size = length;
+ int flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
+ | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS;
+ if (KERN_SUCCESS != memory_object_iopl_request((ipc_port_t) memory->_memEntry, 0, &size, &redirUPL,
+ NULL, NULL,
+ &flags))
+ redirUPL = 0;
+
+ if (physMem)
+ {
+ IOUnmapPages( addressMap, logical, length );
+ physMem->redirect(0, true);
+ }
+ }
+
+ if (newBackingMemory)
+ {
+ if (newBackingMemory != memory)
+ {
+ if (this != newBackingMemory->makeMapping(newBackingMemory, addressTask, (IOVirtualAddress) this,
+ options | kIOMapUnique | kIOMapReference,
+ offset, length))
+ err = kIOReturnError;
+ }
+ if (redirUPL)
+ {
+ upl_commit(redirUPL, NULL, 0);
+ upl_deallocate(redirUPL);
+ redirUPL = 0;
+ }
+ if (physMem)
+ physMem->redirect(0, false);
+ }
+ }
+ while (false);
+
+ UNLOCK;
+
+ if (physMem)
+ physMem->release();
+
+ return (err);
+}
+
IOMemoryMap * IOMemoryDescriptor::makeMapping(
IOMemoryDescriptor * owner,
task_t intoTask,
IOByteCount offset,
IOByteCount length )
{
+ IOMemoryDescriptor * mapDesc = 0;
_IOMemoryMap * mapping = 0;
OSIterator * iter;
LOCK;
- do {
- // look for an existing mapping
- if( (iter = OSCollectionIterator::withCollection( _mappings))) {
+ do
+ {
+ if (kIOMapUnique & options)
+ {
+ IOPhysicalAddress phys;
+ IOByteCount physLen;
+
+ if (owner != this)
+ continue;
+
+ if (((_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
+ || ((_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64))
+ {
+ phys = getPhysicalSegment(offset, &physLen);
+ if (!phys || (physLen < length))
+ continue;
+
+ mapDesc = IOMemoryDescriptor::withPhysicalAddress(
+ phys, length, _direction);
+ if (!mapDesc)
+ continue;
+ offset = 0;
+ }
+ else
+ {
+ mapDesc = this;
+ mapDesc->retain();
+ }
- while( (mapping = (_IOMemoryMap *) iter->getNextObject())) {
+ if (kIOMapReference & options)
+ {
+ mapping = (_IOMemoryMap *) toAddress;
+ mapping->retain();
+
+#if 1
+ uint32_t pageOffset1 = mapDesc->getSourceSegment( offset, NULL );
+ pageOffset1 -= trunc_page_32( pageOffset1 );
+
+ uint32_t pageOffset2 = mapping->getVirtualAddress();
+ pageOffset2 -= trunc_page_32( pageOffset2 );
+
+ if (pageOffset1 != pageOffset2)
+ IOLog("::redirect can't map offset %x to addr %x\n",
+ pageOffset1, mapping->getVirtualAddress());
+#endif
+
+
+ if (!mapping->initWithDescriptor( mapDesc, intoTask, toAddress, options,
+ offset, length ))
+ {
+#ifdef DEBUG
+ IOLog("Didn't redirect map %08lx : %08lx\n", offset, length );
+#endif
+ }
+
+ if (mapping->owner)
+ mapping->owner->removeMapping(mapping);
+ continue;
+ }
+ }
+ else
+ {
+ // look for an existing mapping
+ if( (iter = OSCollectionIterator::withCollection( _mappings))) {
+
+ while( (mapping = (_IOMemoryMap *) iter->getNextObject())) {
+
+ if( (mapping = mapping->copyCompatible(
+ owner, intoTask, toAddress,
+ options | kIOMapReference,
+ offset, length )))
+ break;
+ }
+ iter->release();
+ }
- if( (mapping = mapping->isCompatible(
- owner, intoTask, toAddress,
- options | kIOMapReference,
- offset, length )))
- break;
- }
- iter->release();
- if( mapping)
- continue;
- }
+ if (mapping)
+ mapping->retain();
- if( mapping || (options & kIOMapReference))
- continue;
+ if( mapping || (options & kIOMapReference))
+ continue;
+ mapDesc = owner;
+ mapDesc->retain();
+ }
owner = this;
mapping = new _IOMemoryMap;
if( mapping
- && !mapping->init( owner, intoTask, toAddress, options,
+ && !mapping->initWithDescriptor( mapDesc, intoTask, toAddress, options,
offset, length )) {
-
+#ifdef DEBUG
IOLog("Didn't make map %08lx : %08lx\n", offset, length );
+#endif
mapping->release();
mapping = 0;
}
+ if (mapping)
+ mapping->retain();
+
} while( false );
- owner->addMapping( mapping);
+ if (mapping)
+ {
+ mapping->owner = owner;
+ owner->addMapping( mapping);
+ mapping->release();
+ }
UNLOCK;
+ if (mapDesc)
+ mapDesc->release();
+
return( mapping);
}
if( mapping) {
if( 0 == _mappings)
_mappings = OSSet::withCapacity(1);
- if( _mappings && _mappings->setObject( mapping ))
- mapping->release(); /* really */
+ if( _mappings )
+ _mappings->setObject( mapping );
}
}
void IOMemoryDescriptor::removeMapping(
IOMemoryMap * mapping )
{
- if( _mappings) {
- mapping->retain();
- mapping->retain();
+ if( _mappings)
_mappings->removeObject( mapping);
- }
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
bool IOSubMemoryDescriptor::initSubRange( IOMemoryDescriptor * parent,
IOByteCount offset, IOByteCount length,
- IODirection withDirection )
+ IODirection direction )
{
- if( !super::init())
- return( false );
-
if( !parent)
return( false);
if( (offset + length) > parent->getLength())
return( false);
+ /*
+ * We can check the _parent instance variable before having ever set it
+ * to an initial value because I/O Kit guarantees that all our instance
+ * variables are zeroed on an object's allocation.
+ */
+
+ if( !_parent) {
+ if( !super::init())
+ return( false );
+ } else {
+ /*
+ * An existing memory descriptor is being retargeted to
+ * point to somewhere else. Clean up our present state.
+ */
+
+ _parent->release();
+ _parent = 0;
+ }
+
parent->retain();
_parent = parent;
_start = offset;
_length = length;
- _direction = withDirection;
+ _direction = direction;
_tag = parent->getTag();
return( true );
}
-IOPhysicalAddress IOSubMemoryDescriptor::getPhysicalSegment( IOByteCount offset,
- IOByteCount * length )
+IOReturn
+IOSubMemoryDescriptor::dmaCommandOperation(DMACommandOps op, void *vData, UInt dataSize) const
+{
+ IOReturn rtn;
+
+ if (kIOMDGetCharacteristics == op) {
+
+ rtn = _parent->dmaCommandOperation(op, vData, dataSize);
+ if (kIOReturnSuccess == rtn) {
+ IOMDDMACharacteristics *data = (IOMDDMACharacteristics *) vData;
+ data->fLength = _length;
+ data->fSGCount = 0; // XXX gvdl: need to compute and pages
+ data->fPages = 0;
+ data->fPageAlign = 0;
+ }
+
+ return rtn;
+ }
+ else if (kIOMDWalkSegments & op) {
+ if (dataSize < sizeof(IOMDDMAWalkSegmentArgs))
+ return kIOReturnUnderrun;
+
+ IOMDDMAWalkSegmentArgs *data =
+ reinterpret_cast<IOMDDMAWalkSegmentArgs *>(vData);
+ UInt offset = data->fOffset;
+ UInt remain = _length - offset;
+ if ((int) remain <= 0)
+ return (!remain)? kIOReturnOverrun : kIOReturnInternalError;
+
+ data->fOffset = offset + _start;
+ rtn = _parent->dmaCommandOperation(op, vData, dataSize);
+ if (data->fLength > remain)
+ data->fLength = remain;
+ data->fOffset = offset;
+
+ return rtn;
+ }
+ else
+ return kIOReturnBadArgument;
+}
+
+addr64_t
+IOSubMemoryDescriptor::getPhysicalSegment64(IOByteCount offset, IOByteCount * length)
+{
+ addr64_t address;
+ IOByteCount actualLength;
+
+ assert(offset <= _length);
+
+ if( length)
+ *length = 0;
+
+ if( offset >= _length)
+ return( 0 );
+
+ address = _parent->getPhysicalSegment64( offset + _start, &actualLength );
+
+ if( address && length)
+ *length = min( _length - offset, actualLength );
+
+ return( address );
+}
+
+IOPhysicalAddress
+IOSubMemoryDescriptor::getPhysicalSegment( IOByteCount offset, IOByteCount * length )
{
IOPhysicalAddress address;
IOByteCount actualLength;
return( address );
}
+
+IOReturn IOSubMemoryDescriptor::doMap(
+ vm_map_t addressMap,
+ IOVirtualAddress * atAddress,
+ IOOptionBits options,
+ IOByteCount sourceOffset,
+ IOByteCount length )
+{
+ if( sourceOffset >= _length)
+ return( kIOReturnOverrun );
+ return (_parent->doMap(addressMap, atAddress, options, sourceOffset + _start, length));
+}
+
+IOPhysicalAddress
+IOSubMemoryDescriptor::getSourceSegment( IOByteCount offset, IOByteCount * length )
+{
+ IOPhysicalAddress address;
+ IOByteCount actualLength;
+
+ assert(offset <= _length);
+
+ if( length)
+ *length = 0;
+
+ if( offset >= _length)
+ return( 0 );
+
+ address = _parent->getSourceSegment( offset + _start, &actualLength );
+
+ if( address && length)
+ *length = min( _length - offset, actualLength );
+
+ return( address );
+}
+
void * IOSubMemoryDescriptor::getVirtualSegment(IOByteCount offset,
IOByteCount * lengthOfSegment)
{
}
IOByteCount IOSubMemoryDescriptor::readBytes(IOByteCount offset,
- void * bytes, IOByteCount withLength)
+ void * bytes, IOByteCount length)
{
IOByteCount byteCount;
LOCK;
byteCount = _parent->readBytes( _start + offset, bytes,
- min(withLength, _length - offset) );
+ min(length, _length - offset) );
UNLOCK;
return( byteCount );
}
IOByteCount IOSubMemoryDescriptor::writeBytes(IOByteCount offset,
- const void* bytes, IOByteCount withLength)
+ const void* bytes, IOByteCount length)
{
IOByteCount byteCount;
LOCK;
byteCount = _parent->writeBytes( _start + offset, bytes,
- min(withLength, _length - offset) );
+ min(length, _length - offset) );
UNLOCK;
return( byteCount );
}
+IOReturn IOSubMemoryDescriptor::setPurgeable( IOOptionBits newState,
+ IOOptionBits * oldState )
+{
+ IOReturn err;
+
+ LOCK;
+ err = _parent->setPurgeable( newState, oldState );
+ UNLOCK;
+
+ return( err );
+}
+
+IOReturn IOSubMemoryDescriptor::performOperation( IOOptionBits options,
+ IOByteCount offset, IOByteCount length )
+{
+ IOReturn err;
+
+ assert(offset <= _length);
+
+ if( offset >= _length)
+ return( kIOReturnOverrun );
+
+ LOCK;
+ err = _parent->performOperation( options, _start + offset,
+ min(length, _length - offset) );
+ UNLOCK;
+
+ return( err );
+}
+
IOReturn IOSubMemoryDescriptor::prepare(
- IODirection forDirection = kIODirectionNone)
+ IODirection forDirection)
{
IOReturn err;
}
IOReturn IOSubMemoryDescriptor::complete(
- IODirection forDirection = kIODirectionNone)
+ IODirection forDirection)
{
IOReturn err;
IOByteCount offset,
IOByteCount length )
{
- IOMemoryMap * mapping;
+ IOMemoryMap * mapping = 0;
- mapping = (IOMemoryMap *) _parent->makeMapping(
+ if (!(kIOMapUnique & options))
+ mapping = (IOMemoryMap *) _parent->makeMapping(
_parent, intoTask,
toAddress - (_start + offset),
options | kIOMapReference,
_start + offset, length );
+ if( !mapping)
+ mapping = (IOMemoryMap *) _parent->makeMapping(
+ _parent, intoTask,
+ toAddress,
+ options, _start + offset, length );
+
if( !mapping)
mapping = super::makeMapping( owner, intoTask, toAddress, options,
offset, length );
bool
IOSubMemoryDescriptor::initWithAddress(void * address,
- IOByteCount withLength,
- IODirection withDirection)
+ IOByteCount length,
+ IODirection direction)
{
return( false );
}
bool
IOSubMemoryDescriptor::initWithAddress(vm_address_t address,
- IOByteCount withLength,
- IODirection withDirection,
- task_t withTask)
+ IOByteCount length,
+ IODirection direction,
+ task_t task)
{
return( false );
}
bool
IOSubMemoryDescriptor::initWithPhysicalAddress(
IOPhysicalAddress address,
- IOByteCount withLength,
- IODirection withDirection )
+ IOByteCount length,
+ IODirection direction )
{
return( false );
}
IOSubMemoryDescriptor::initWithRanges(
IOVirtualRange * ranges,
UInt32 withCount,
- IODirection withDirection,
- task_t withTask,
- bool asReference = false)
+ IODirection direction,
+ task_t task,
+ bool asReference)
{
return( false );
}
bool
IOSubMemoryDescriptor::initWithPhysicalRanges( IOPhysicalRange * ranges,
UInt32 withCount,
- IODirection withDirection,
- bool asReference = false)
+ IODirection direction,
+ bool asReference)
{
return( false );
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 0);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 1);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 2);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 3);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 4);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 5);
+bool IOGeneralMemoryDescriptor::serialize(OSSerialize * s) const
+{
+ OSSymbol const *keys[2];
+ OSObject *values[2];
+ struct SerData {
+ user_addr_t address;
+ user_size_t length;
+ } *vcopy;
+ unsigned int index, nRanges;
+ bool result;
+
+ IOOptionBits type = _flags & kIOMemoryTypeMask;
+
+ if (s == NULL) return false;
+ if (s->previouslySerialized(this)) return true;
+
+ // Pretend we are an array.
+ if (!s->addXMLStartTag(this, "array")) return false;
+
+ nRanges = _rangesCount;
+ vcopy = (SerData *) IOMalloc(sizeof(SerData) * nRanges);
+ if (vcopy == 0) return false;
+
+ keys[0] = OSSymbol::withCString("address");
+ keys[1] = OSSymbol::withCString("length");
+
+ result = false;
+ values[0] = values[1] = 0;
+
+ // From this point on we can go to bail.
+
+ // Copy the volatile data so we don't have to allocate memory
+ // while the lock is held.
+ LOCK;
+ if (nRanges == _rangesCount) {
+ Ranges vec = _ranges;
+ for (index = 0; index < nRanges; index++) {
+ user_addr_t addr; IOByteCount len;
+ getAddrLenForInd(addr, len, type, vec, index);
+ vcopy[index].address = addr;
+ vcopy[index].length = len;
+ }
+ } else {
+ // The descriptor changed out from under us. Give up.
+ UNLOCK;
+ result = false;
+ goto bail;
+ }
+ UNLOCK;
+
+ for (index = 0; index < nRanges; index++)
+ {
+ user_addr_t addr = vcopy[index].address;
+ IOByteCount len = (IOByteCount) vcopy[index].length;
+ values[0] =
+ OSNumber::withNumber(addr, (((UInt64) addr) >> 32)? 64 : 32);
+ if (values[0] == 0) {
+ result = false;
+ goto bail;
+ }
+ values[1] = OSNumber::withNumber(len, sizeof(len) * 8);
+ if (values[1] == 0) {
+ result = false;
+ goto bail;
+ }
+ OSDictionary *dict = OSDictionary::withObjects((const OSObject **)values, (const OSSymbol **)keys, 2);
+ if (dict == 0) {
+ result = false;
+ goto bail;
+ }
+ values[0]->release();
+ values[1]->release();
+ values[0] = values[1] = 0;
+
+ result = dict->serialize(s);
+ dict->release();
+ if (!result) {
+ goto bail;
+ }
+ }
+ result = s->addXMLEndTag("array");
+
+ bail:
+ if (values[0])
+ values[0]->release();
+ if (values[1])
+ values[1]->release();
+ if (keys[0])
+ keys[0]->release();
+ if (keys[1])
+ keys[1]->release();
+ if (vcopy)
+ IOFree(vcopy, sizeof(IOVirtualRange) * nRanges);
+ return result;
+}
+
+bool IOSubMemoryDescriptor::serialize(OSSerialize * s) const
+{
+ if (!s) {
+ return (false);
+ }
+ if (s->previouslySerialized(this)) return true;
+
+ // Pretend we are a dictionary.
+ // We must duplicate the functionality of OSDictionary here
+ // because otherwise object references will not work;
+ // they are based on the value of the object passed to
+ // previouslySerialized and addXMLStartTag.
+
+ if (!s->addXMLStartTag(this, "dict")) return false;
+
+ char const *keys[3] = {"offset", "length", "parent"};
+
+ OSObject *values[3];
+ values[0] = OSNumber::withNumber(_start, sizeof(_start) * 8);
+ if (values[0] == 0)
+ return false;
+ values[1] = OSNumber::withNumber(_length, sizeof(_length) * 8);
+ if (values[1] == 0) {
+ values[0]->release();
+ return false;
+ }
+ values[2] = _parent;
+
+ bool result = true;
+ for (int i=0; i<3; i++) {
+ if (!s->addString("<key>") ||
+ !s->addString(keys[i]) ||
+ !s->addXMLEndTag("key") ||
+ !values[i]->serialize(s)) {
+ result = false;
+ break;
+ }
+ }
+ values[0]->release();
+ values[1]->release();
+ if (!result) {
+ return false;
+ }
+
+ return s->addXMLEndTag("dict");
+}
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 0);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 1);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 2);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 3);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 4);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 5);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 6);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 7);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 8);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 13);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 14);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 15);
+
+/* ex-inline function implementation */
+IOPhysicalAddress
+IOMemoryDescriptor::getPhysicalAddress()
+ { return( getPhysicalSegment( 0, 0 )); }
+
+
+
projects / apple / xnu.git / blobdiff