* 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>
__BEGIN_DECLS
#include <vm/pmap.h>
+#include <mach/memory_object_types.h>
#include <device/device_port.h>
-void bcopy_phys(char *from, char *to, int size);
-void pmap_enter(pmap_t pmap, vm_offset_t va, vm_offset_t pa,
- vm_prot_t prot, unsigned int flags, boolean_t wired);
+
#ifndef i386
-struct phys_entry *pmap_find_physentry(vm_offset_t pa);
+struct phys_entry *pmap_find_physentry(ppnum_t pa);
#endif
+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(
device_pager_populate_object(
memory_object_t pager,
vm_object_offset_t offset,
- vm_offset_t phys_addr,
+ 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);
/*
* Page fault handling based on vm_map (or entries therein)
pmap_t caller_pmap,
vm_offset_t caller_pmap_addr);
-__END_DECLS
+unsigned int IOTranslateCacheBits(struct phys_entry *pp);
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+vm_map_t IOPageableMapForAddress( vm_address_t address );
-OSDefineMetaClassAndAbstractStructors( IOMemoryDescriptor, OSObject )
+typedef kern_return_t (*IOIteratePageableMapsCallback)(vm_map_t map, void * ref);
-#define super IOMemoryDescriptor
+kern_return_t IOIteratePageableMaps(vm_size_t size,
+ IOIteratePageableMapsCallback callback, void * ref);
+__END_DECLS
-OSDefineMetaClassAndStructors(IOGeneralMemoryDescriptor, IOMemoryDescriptor)
+#define kIOMaximumMappedIOByteCount (512*1024*1024)
-extern "C" {
+static IOMapper * gIOSystemMapper;
+static ppnum_t gIOMaximumMappedIOPageCount = atop_32(kIOMaximumMappedIOByteCount);
-vm_map_t IOPageableMapForAddress( vm_address_t address );
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-typedef kern_return_t (*IOIteratePageableMapsCallback)(vm_map_t map, void * ref);
+OSDefineMetaClassAndAbstractStructors( IOMemoryDescriptor, OSObject )
-kern_return_t IOIteratePageableMaps(vm_size_t size,
- IOIteratePageableMapsCallback callback, void * ref);
+#define super IOMemoryDescriptor
-}
+OSDefineMetaClassAndStructors(IOGeneralMemoryDescriptor, IOMemoryDescriptor)
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-inline vm_map_t IOGeneralMemoryDescriptor::getMapForTask( task_t task, vm_address_t address )
-{
- if( (task == kernel_task) && (kIOMemoryRequiresWire & _flags))
- return( IOPageableMapForAddress( address ) );
- else
- return( get_task_map( task ));
-}
-
-inline vm_offset_t pmap_extract_safe(task_t task, vm_offset_t va)
-{
- vm_offset_t pa = pmap_extract(get_task_pmap(task), va);
-
- if ( pa == 0 )
- {
- pa = vm_map_get_phys_page(get_task_map(task), trunc_page(va));
- if ( pa ) pa += va - trunc_page(va);
- }
-
- return pa;
-}
-
-inline void bcopy_phys_safe(char * from, char * to, int size)
-{
- boolean_t enabled = ml_set_interrupts_enabled(FALSE);
-
- bcopy_phys(from, to, size);
-
- ml_set_interrupts_enabled(enabled);
-}
-
-#define next_page(a) ( trunc_page(a) + page_size )
+#define next_page(a) ( trunc_page_32(a) + PAGE_SIZE )
extern "C" {
*/
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)
{
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 )
+{
+ 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();
return 0;
}
-IOMemoryDescriptor *
-IOMemoryDescriptor::withPhysicalAddress(
- IOPhysicalAddress address,
- IOByteCount withLength,
- IODirection withDirection )
-{
- return( IOMemoryDescriptor::withAddress( address, withLength,
- withDirection, (task_t) 0 ));
-}
-
/*
* withRanges:
* 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 that;
+ return self;
}
/*
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;
+ if (task == kernel_task)
+ mdOpts |= kIOMemoryAutoPrepare;
+ }
+ else
+ mdOpts |= kIOMemoryTypePhysical;
+
+ // @@@ gvdl: Need to remove this
+ // Auto-prepare if this is a kernel memory descriptor as very few
+ // clients bother to prepare() kernel memory.
+ // But it has been enforced so what are you going to do?
+
+ 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 or several physical ranges or finally an UPL from the ubc
+ * system.
*
* 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.
*/
+
+enum ioPLBlockFlags {
+ kIOPLOnDevice = 0x00000001,
+ kIOPLExternUPL = 0x00000002,
+};
+
+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[0]; // @@@ gvdl need to get rid of this
+ // should be able to use upl directly
+ ioPLBlock fBlocks[0];
+};
+
+#define getDataP(osd) ((ioGMDData *) (osd)->getBytesNoCopy())
+#define getIOPLList(d) ((ioPLBlock *) &(d->fPageList[d->fPageCnt]))
+#define getNumIOPL(d,len) \
+ ((len - ((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))
+
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)
+{
+
+ switch (options & kIOMemoryTypeMask) {
+ case kIOMemoryTypeVirtual:
+ assert(task);
+ if (!task)
+ return false;
+ else
+ break;
+
+ case kIOMemoryTypePhysical: // Neither Physical nor UPL should have a task
+ mapper = kIOMapperNone;
+ case kIOMemoryTypeUPL:
+ assert(!task);
+ break;
+ default:
+panic("IOGMD::iWO(): bad type"); // @@@ gvdl: for testing
+ 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)
if (_ranges.v && _rangesIsAllocated)
IODelete(_ranges.v, IOVirtualRange, _rangesCount);
}
+ 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) {
+ IOMapper::checkForSystemMapper();
+ gIOSystemMapper = mapper = IOMapper::gSystem;
+ }
- _ranges.v = 0;
- _rangesCount = withCount;
- _rangesIsAllocated = asReference ? false : true;
- _direction = withDirection;
- _length = 0;
- _task = withTask;
+ _flags = options;
+ _task = task;
+
+ // DEPRECATED variable initialisation
+ _direction = (IODirection) (_flags & kIOMemoryDirectionMask);
_position = 0;
- _positionAtIndex = 0;
- _positionAtOffset = 0;
_kernPtrAligned = 0;
_cachedPhysicalAddress = 0;
_cachedVirtualAddress = 0;
- _flags = 0;
- if (withTask && (withTask != kernel_task))
- _flags |= kIOMemoryRequiresWire;
+ if ( (options & kIOMemoryTypeMask) == kIOMemoryTypeUPL) {
- 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));
- }
+ ioGMDData *dataP;
+ unsigned int dataSize = computeDataSize(/* pages */ 0, /* upls */ 1);
- for (unsigned index = 0; index < _rangesCount; index++)
- {
- _length += _ranges.v[index].length;
+ 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;
+ if (!pageList->device) {
+ // @@@ gvdl: Ask JoeS are the pages contiguious with the list?
+ // or there a chance that we may be inserting 0 phys_addrs?
+ // 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 | kIOMemoryTypePhysical */
+ IOVirtualRange *ranges = (IOVirtualRange *) buffers;
- return true;
-}
+ /*
+ * Initialize the memory descriptor.
+ */
-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 ));
+ _length = 0;
+ _pages = 0;
+ for (unsigned ind = 0; ind < count; ind++) {
+ IOVirtualRange cur = ranges[ind];
+
+ _length += cur.length;
+ _pages += atop_32(cur.address + cur.length + PAGE_MASK)
+ - atop_32(cur.address);
+ }
+
+ _ranges.v = 0;
+ _rangesIsAllocated = !(options & kIOMemoryAsReference);
+ _rangesCount = count;
+
+ if (options & kIOMemoryAsReference)
+ _ranges.v = ranges;
+ else {
+ _ranges.v = IONew(IOVirtualRange, count);
+ if (!_ranges.v)
+ return false;
+ bcopy(/* from */ ranges, _ranges.v,
+ count * sizeof(IOVirtualRange));
+ }
+
+ // Auto-prepare memory at creation time.
+ // Implied completion when descriptor is free-ed
+ if ( (options & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
+ _wireCount++; // Physical MDs are start out wired
+ else { /* kIOMemoryTypeVirtual */
+ ioGMDData *dataP;
+ unsigned int dataSize =
+ computeDataSize(_pages, /* upls */ _rangesCount * 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)
+ {
+ kern_return_t error;
+ ipc_port_t sharedMem;
+
+ vm_size_t size = _pages << PAGE_SHIFT;
+ vm_address_t startPage;
+
+ startPage = trunc_page_32(_ranges.v[0].address);
+
+ vm_map_t theMap = ((_task == kernel_task) && (kIOMemoryBufferPageable & _flags))
+ ? IOPageableMapForAddress(startPage)
+ : get_task_map(_task);
+
+ vm_size_t actualSize = size;
+ error = mach_make_memory_entry( theMap,
+ &actualSize, startPage,
+ VM_PROT_READ | VM_PROT_WRITE, &sharedMem,
+ NULL );
+
+ if (KERN_SUCCESS == error) {
+ if (actualSize == round_page_32(size)) {
+ _memEntry = (void *) sharedMem;
+ } else {
+#if IOASSERT
+ IOLog("mach_make_memory_entry_64 (%08x) size (%08lx:%08x)\n",
+ startPage, (UInt32)actualSize, size);
+#endif
+ ipc_port_release_send( sharedMem );
+ }
+ }
+ }
+
+ if ((_flags & kIOMemoryAutoPrepare)
+ && prepare() != kIOReturnSuccess)
+ return false;
+ }
+ }
+
+ return true;
}
/*
while (_wireCount)
complete();
+ if (_memoryEntries)
+ _memoryEntries->release();
+
if (_kernPtrAligned)
unmapFromKernel();
if (_ranges.v && _rangesIsAllocated)
IODelete(_ranges.v, IOVirtualRange, _rangesCount);
- if( reserved && reserved->devicePager)
- device_pager_deallocate( reserved->devicePager );
+ if (reserved && reserved->devicePager)
+ device_pager_deallocate( (memory_object_t) reserved->devicePager );
- // memEntry holds a ref on the device pager which owns reserved (ExpansionData)
- // so no reserved access after this point
- if( _memEntry)
+ // 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 );
+
super::free();
}
/* DEPRECATED */ void IOGeneralMemoryDescriptor::unmapFromKernel()
/* DEPRECATED */ {
-/* DEPRECATED */ kern_return_t krtn;
-/* DEPRECATED */ vm_offset_t off;
-/* DEPRECATED */ // Pull the shared pages out of the task map
-/* DEPRECATED */ // Do we need to unwire it first?
-/* DEPRECATED */ for ( off = 0; off < _kernSize; off += page_size )
-/* DEPRECATED */ {
-/* DEPRECATED */ pmap_change_wiring(
-/* DEPRECATED */ kernel_pmap,
-/* DEPRECATED */ _kernPtrAligned + off,
-/* DEPRECATED */ FALSE);
-/* DEPRECATED */
-/* DEPRECATED */ pmap_remove(
-/* DEPRECATED */ kernel_pmap,
-/* DEPRECATED */ _kernPtrAligned + off,
-/* DEPRECATED */ _kernPtrAligned + off + page_size);
-/* DEPRECATED */ }
-/* DEPRECATED */ // Free the former shmem area in the task
-/* DEPRECATED */ krtn = vm_deallocate(kernel_map,
-/* DEPRECATED */ _kernPtrAligned,
-/* DEPRECATED */ _kernSize );
-/* DEPRECATED */ assert(krtn == KERN_SUCCESS);
-/* DEPRECATED */ _kernPtrAligned = 0;
+ panic("IOGMD::unmapFromKernel deprecated");
/* DEPRECATED */ }
/* DEPRECATED */
/* DEPRECATED */ void IOGeneralMemoryDescriptor::mapIntoKernel(unsigned rangeIndex)
/* DEPRECATED */ {
-/* DEPRECATED */ kern_return_t krtn;
-/* DEPRECATED */ vm_offset_t off;
-/* DEPRECATED */
-/* DEPRECATED */ if (_kernPtrAligned)
-/* DEPRECATED */ {
-/* DEPRECATED */ if (_kernPtrAtIndex == rangeIndex) return;
-/* DEPRECATED */ unmapFromKernel();
-/* DEPRECATED */ assert(_kernPtrAligned == 0);
-/* DEPRECATED */ }
-/* DEPRECATED */
-/* DEPRECATED */ vm_offset_t srcAlign = trunc_page(_ranges.v[rangeIndex].address);
-/* DEPRECATED */
-/* DEPRECATED */ _kernSize = trunc_page(_ranges.v[rangeIndex].address +
-/* DEPRECATED */ _ranges.v[rangeIndex].length +
-/* DEPRECATED */ page_size - 1) - srcAlign;
-/* DEPRECATED */
-/* DEPRECATED */ /* Find some memory of the same size in kernel task. We use vm_allocate() */
-/* DEPRECATED */ /* to do this. vm_allocate inserts the found memory object in the */
-/* DEPRECATED */ /* target task's map as a side effect. */
-/* DEPRECATED */ krtn = vm_allocate( kernel_map,
-/* DEPRECATED */ &_kernPtrAligned,
-/* DEPRECATED */ _kernSize,
-/* DEPRECATED */ VM_FLAGS_ANYWHERE|VM_MAKE_TAG(VM_MEMORY_IOKIT) ); // Find first fit
-/* DEPRECATED */ assert(krtn == KERN_SUCCESS);
-/* DEPRECATED */ if(krtn) return;
-/* DEPRECATED */
-/* DEPRECATED */ /* For each page in the area allocated from the kernel map, */
-/* DEPRECATED */ /* find the physical address of the page. */
-/* DEPRECATED */ /* Enter the page in the target task's pmap, at the */
-/* DEPRECATED */ /* appropriate target task virtual address. */
-/* DEPRECATED */ for ( off = 0; off < _kernSize; off += page_size )
-/* DEPRECATED */ {
-/* DEPRECATED */ vm_offset_t kern_phys_addr, phys_addr;
-/* DEPRECATED */ if( _task)
-/* DEPRECATED */ phys_addr = pmap_extract( get_task_pmap(_task), srcAlign + off );
-/* DEPRECATED */ else
-/* DEPRECATED */ phys_addr = srcAlign + off;
-/* DEPRECATED */ assert(phys_addr);
-/* DEPRECATED */ if(phys_addr == 0) return;
-/* DEPRECATED */
-/* DEPRECATED */ // Check original state.
-/* DEPRECATED */ kern_phys_addr = pmap_extract( kernel_pmap, _kernPtrAligned + off );
-/* DEPRECATED */ // Set virtual page to point to the right physical one
-/* DEPRECATED */ pmap_enter(
-/* DEPRECATED */ kernel_pmap,
-/* DEPRECATED */ _kernPtrAligned + off,
-/* DEPRECATED */ phys_addr,
-/* DEPRECATED */ VM_PROT_READ|VM_PROT_WRITE,
-/* DEPRECATED */ VM_WIMG_USE_DEFAULT,
-/* DEPRECATED */ TRUE);
-/* DEPRECATED */ }
-/* DEPRECATED */ _kernPtrAtIndex = rangeIndex;
+ panic("IOGMD::mapIntoKernel deprecated");
/* DEPRECATED */ }
/*
return _length;
}
-void IOMemoryDescriptor::setTag(
- IOOptionBits tag )
+void IOMemoryDescriptor::setTag( IOOptionBits tag )
{
_tag = tag;
}
return( _tag);
}
+// @@@ gvdl: who is using this API? Seems like a wierd thing to implement.
IOPhysicalAddress IOMemoryDescriptor::getSourceSegment( IOByteCount offset,
IOByteCount * length )
{
return( physAddr );
}
-IOByteCount IOMemoryDescriptor::readBytes( IOByteCount offset,
- void * bytes,
- IOByteCount withLength )
+IOByteCount IOMemoryDescriptor::readBytes
+ (IOByteCount offset, void *bytes, IOByteCount length)
{
- IOByteCount bytesCopied = 0;
+ addr64_t dstAddr = (addr64_t) (UInt32) bytes;
+ IOByteCount remaining;
- assert(offset <= _length);
- assert(offset <= _length - withLength);
+ // 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 ( offset < _length )
- {
- withLength = min(withLength, _length - offset);
+ remaining = length = min(length, _length - offset);
+ while (remaining) { // (process another target segment?)
+ addr64_t srcAddr64;
+ IOByteCount srcLen;
- while ( withLength ) // (process another source segment?)
- {
- IOPhysicalAddress sourceSegment;
- IOByteCount sourceSegmentLength;
+ srcAddr64 = getPhysicalSegment64(offset, &srcLen);
+ if (!srcAddr64)
+ break;
- sourceSegment = getPhysicalSegment(offset, &sourceSegmentLength);
- if ( sourceSegment == 0 ) goto readBytesErr;
+ // Clip segment length to remaining
+ if (srcLen > remaining)
+ srcLen = remaining;
- sourceSegmentLength = min(sourceSegmentLength, withLength);
+ copypv(srcAddr64, dstAddr, srcLen,
+ cppvPsrc | cppvNoRefSrc | cppvFsnk | cppvKmap);
- while ( sourceSegmentLength ) // (process another target segment?)
- {
- IOPhysicalAddress targetSegment;
- IOByteCount targetSegmentLength;
+ dstAddr += srcLen;
+ offset += srcLen;
+ remaining -= srcLen;
+ }
- targetSegment = pmap_extract_safe(kernel_task, (vm_offset_t) bytes);
- if ( targetSegment == 0 ) goto readBytesErr;
+ assert(!remaining);
- targetSegmentLength = min(next_page(targetSegment) - targetSegment, sourceSegmentLength);
+ return length - remaining;
+}
- if ( sourceSegment + targetSegmentLength > next_page(sourceSegment) )
- {
- IOByteCount pageLength;
+IOByteCount IOMemoryDescriptor::writeBytes
+ (IOByteCount offset, const void *bytes, IOByteCount length)
+{
+ addr64_t srcAddr = (addr64_t) (UInt32) bytes;
+ IOByteCount remaining;
- pageLength = next_page(sourceSegment) - sourceSegment;
+ // Assert that this entire I/O is withing the available range
+ assert(offset < _length);
+ assert(offset + length <= _length);
- bcopy_phys_safe( /* from */ (char *) sourceSegment,
- /* to */ (char *) targetSegment,
- /* size */ (int ) pageLength );
+ assert( !(kIOMemoryPreparedReadOnly & _flags) );
- ((UInt8 *) bytes) += pageLength;
- bytesCopied += pageLength;
- offset += pageLength;
- sourceSegment += pageLength;
- sourceSegmentLength -= pageLength;
- targetSegment += pageLength;
- targetSegmentLength -= pageLength;
- withLength -= pageLength;
- }
+ if ( (kIOMemoryPreparedReadOnly & _flags) || offset >= _length) {
+IOLog("IOGMD(%p): wB = o%lx, l%lx\n", this, offset, length); // @@@ gvdl
+ return 0;
+ }
- bcopy_phys_safe( /* from */ (char *) sourceSegment,
- /* to */ (char *) targetSegment,
- /* size */ (int ) targetSegmentLength );
+ remaining = length = min(length, _length - offset);
+ while (remaining) { // (process another target segment?)
+ addr64_t dstAddr64;
+ IOByteCount dstLen;
- ((UInt8 *) bytes) += targetSegmentLength;
- bytesCopied += targetSegmentLength;
- offset += targetSegmentLength;
- sourceSegment += targetSegmentLength;
- sourceSegmentLength -= targetSegmentLength;
- withLength -= targetSegmentLength;
- }
- }
- }
+ dstAddr64 = getPhysicalSegment64(offset, &dstLen);
+ if (!dstAddr64)
+ break;
-readBytesErr:
+ // Clip segment length to remaining
+ if (dstLen > remaining)
+ dstLen = remaining;
- if ( bytesCopied )
- {
- // We mark the destination pages as modified, just
- // in case they are made pageable later on in life.
+ copypv(srcAddr, (addr64_t) dstAddr64, dstLen,
+ cppvPsnk | cppvFsnk | cppvNoRefSrc | cppvNoModSnk | cppvKmap);
- pmap_modify_pages( /* pmap */ kernel_pmap,
- /* start */ trunc_page(((vm_offset_t) bytes) - bytesCopied),
- /* end */ round_page(((vm_offset_t) bytes)) );
+ srcAddr += dstLen;
+ offset += dstLen;
+ remaining -= dstLen;
}
- return bytesCopied;
+ assert(!remaining);
+
+ return length - remaining;
}
-IOByteCount IOMemoryDescriptor::writeBytes( IOByteCount offset,
- const void * bytes,
- IOByteCount withLength )
-{
- IOByteCount bytesCopied = 0;
+// osfmk/device/iokit_rpc.c
+extern "C" unsigned int IODefaultCacheBits(addr64_t pa);
- assert(offset <= _length);
- assert(offset <= _length - withLength);
+/* DEPRECATED */ void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
+/* DEPRECATED */ {
+ panic("IOGMD::setPosition deprecated");
+/* DEPRECATED */ }
- if ( offset < _length )
- {
- withLength = min(withLength, _length - offset);
+IOPhysicalAddress IOGeneralMemoryDescriptor::getPhysicalSegment
+ (IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ IOPhysicalAddress address = 0;
+ IOPhysicalLength length = 0;
- while ( withLength ) // (process another target segment?)
- {
- IOPhysicalAddress targetSegment;
- IOByteCount targetSegmentLength;
+// assert(offset <= _length);
+ if (offset < _length) // (within bounds?)
+ {
+ if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical) {
+ unsigned int ind;
- targetSegment = getPhysicalSegment(offset, &targetSegmentLength);
- if ( targetSegment == 0 ) goto writeBytesErr;
+ // Physical address based memory descriptor
- targetSegmentLength = min(targetSegmentLength, withLength);
+ // Find offset within descriptor and make it relative
+ // to the current _range.
+ for (ind = 0 ; offset >= _ranges.p[ind].length; ind++ )
+ offset -= _ranges.p[ind].length;
+
+ IOPhysicalRange cur = _ranges.p[ind];
+ address = cur.address + offset;
+ length = cur.length - offset;
+
+ // see how far we can coalesce ranges
+ for (++ind; ind < _rangesCount; ind++) {
+ cur = _ranges.p[ind];
+
+ if (address + length != cur.address)
+ break;
+
+ length += cur.length;
+ }
- while ( targetSegmentLength ) // (process another source segment?)
+ // @@@ gvdl: should assert(address);
+ // but can't as NVidia GeForce creates a bogus physical mem
{
- IOPhysicalAddress sourceSegment;
- IOByteCount sourceSegmentLength;
+ assert(address || /*nvidia*/(!_ranges.p[0].address && 1 == _rangesCount));
+ }
+ assert(length);
+ }
+ else do {
+ // We need wiring & we are wired.
+ assert(_wireCount);
- sourceSegment = pmap_extract_safe(kernel_task, (vm_offset_t) bytes);
- if ( sourceSegment == 0 ) goto writeBytesErr;
+ if (!_wireCount)
+ {
+ panic("IOGMD: not wired for getPhysicalSegment()");
+ continue;
+ }
- sourceSegmentLength = min(next_page(sourceSegment) - sourceSegment, targetSegmentLength);
+ assert(_memoryEntries);
- if ( targetSegment + sourceSegmentLength > next_page(targetSegment) )
- {
- IOByteCount pageLength;
+ ioGMDData * dataP = getDataP(_memoryEntries);
+ const ioPLBlock *ioplList = getIOPLList(dataP);
+ UInt ind, numIOPLs = getNumIOPL(dataP, _memoryEntries->getLength());
+ upl_page_info_t *pageList = getPageList(dataP);
- pageLength = next_page(targetSegment) - targetSegment;
+ assert(numIOPLs > 0);
- bcopy_phys_safe( /* from */ (char *) sourceSegment,
- /* to */ (char *) targetSegment,
- /* size */ (int ) pageLength );
+ // Scan through iopl info blocks looking for block containing offset
+ for (ind = 1; ind < numIOPLs; ind++) {
+ if (offset < ioplList[ind].fIOMDOffset)
+ break;
+ }
- // We flush the data cache in case it is code we've copied,
- // such that the instruction cache is in the know about it.
+ // Go back to actual range as search goes past it
+ ioPLBlock ioplInfo = ioplList[ind - 1];
- flush_dcache(targetSegment, pageLength, true);
+ if (ind < numIOPLs)
+ length = ioplList[ind].fIOMDOffset;
+ else
+ length = _length;
+ length -= offset; // Remainder within iopl
- ((UInt8 *) bytes) += pageLength;
- bytesCopied += pageLength;
- offset += pageLength;
- sourceSegment += pageLength;
- sourceSegmentLength -= pageLength;
- targetSegment += pageLength;
- targetSegmentLength -= pageLength;
- withLength -= pageLength;
- }
+ // Subtract offset till this iopl in total list
+ offset -= ioplInfo.fIOMDOffset;
- bcopy_phys_safe( /* from */ (char *) sourceSegment,
- /* to */ (char *) targetSegment,
- /* size */ (int ) sourceSegmentLength );
+ // This is a mapped IOPL so we just need to compute an offset
+ // relative to the mapped base.
+ if (ioplInfo.fMappedBase) {
+ offset += (ioplInfo.fPageOffset & PAGE_MASK);
+ address = ptoa_32(ioplInfo.fMappedBase) + offset;
+ continue;
+ }
- // We flush the data cache in case it is code we've copied,
- // such that the instruction cache is in the know about it.
+ // Currently the offset is rebased into the current iopl.
+ // Now add the iopl 1st page offset.
+ offset += ioplInfo.fPageOffset;
- flush_dcache(targetSegment, sourceSegmentLength, true);
+ // 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];
- ((UInt8 *) bytes) += sourceSegmentLength;
- bytesCopied += sourceSegmentLength;
- offset += sourceSegmentLength;
- targetSegment += sourceSegmentLength;
- targetSegmentLength -= sourceSegmentLength;
- withLength -= sourceSegmentLength;
+ // Check for direct device non-paged memory
+ if ( ioplInfo.fFlags & kIOPLOnDevice ) {
+ address = ptoa_32(pageList->phys_addr) + offset;
+ continue;
}
- }
- }
-writeBytesErr:
+ // Now we need compute the index into the pageList
+ ind = atop_32(offset);
+ offset &= PAGE_MASK;
+
+ IOPhysicalAddress pageAddr = pageList[ind].phys_addr;
+ address = ptoa_32(pageAddr) + offset;
+
+ // Check for the remaining data in this upl being longer than the
+ // remainder on the current page. This should be checked for
+ // contiguous pages
+ if (length > PAGE_SIZE - offset) {
+ // See if the next page is contiguous. Stop looking when we hit
+ // the end of this upl, which is indicated by the
+ // contigLength >= length.
+ IOByteCount contigLength = PAGE_SIZE - offset;
+
+ // Look for contiguous segment
+ while (contigLength < length
+ && ++pageAddr == pageList[++ind].phys_addr) {
+ contigLength += PAGE_SIZE;
+ }
+ if (length > contigLength)
+ length = contigLength;
+ }
+
+ assert(address);
+ assert(length);
- return bytesCopied;
-}
+ } while (0);
-extern "C" {
-// osfmk/device/iokit_rpc.c
-extern unsigned int IOTranslateCacheBits(struct phys_entry *pp);
-};
+ if (!address)
+ length = 0;
+ }
-/* DEPRECATED */ void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
-/* DEPRECATED */ {
-/* DEPRECATED */ assert(position <= _length);
-/* DEPRECATED */
-/* DEPRECATED */ if (position >= _length)
-/* DEPRECATED */ {
-/* DEPRECATED */ _position = _length;
-/* DEPRECATED */ _positionAtIndex = _rangesCount; /* careful: out-of-bounds */
-/* DEPRECATED */ _positionAtOffset = 0;
-/* DEPRECATED */ return;
-/* DEPRECATED */ }
-/* DEPRECATED */
-/* DEPRECATED */ if (position < _position)
-/* DEPRECATED */ {
-/* DEPRECATED */ _positionAtOffset = position;
-/* DEPRECATED */ _positionAtIndex = 0;
-/* DEPRECATED */ }
-/* DEPRECATED */ else
-/* DEPRECATED */ {
-/* DEPRECATED */ _positionAtOffset += (position - _position);
-/* DEPRECATED */ }
-/* DEPRECATED */ _position = position;
-/* DEPRECATED */
-/* DEPRECATED */ while (_positionAtOffset >= _ranges.v[_positionAtIndex].length)
-/* DEPRECATED */ {
-/* DEPRECATED */ _positionAtOffset -= _ranges.v[_positionAtIndex].length;
-/* DEPRECATED */ _positionAtIndex++;
-/* DEPRECATED */ }
-/* DEPRECATED */ }
+ if (lengthOfSegment)
+ *lengthOfSegment = length;
-IOPhysicalAddress IOGeneralMemoryDescriptor::getPhysicalSegment( IOByteCount offset,
- IOByteCount * lengthOfSegment )
-{
- IOPhysicalAddress address = 0;
- IOPhysicalLength length = 0;
+ return address;
+}
+addr64_t IOMemoryDescriptor::getPhysicalSegment64
+ (IOByteCount offset, IOByteCount *lengthOfSegment)
+{
+ IOPhysicalAddress phys32;
+ IOByteCount length;
+ addr64_t phys64;
-// assert(offset <= _length);
+ phys32 = getPhysicalSegment(offset, lengthOfSegment);
+ if (!phys32)
+ return 0;
- if ( offset < _length ) // (within bounds?)
+ if (gIOSystemMapper)
{
- unsigned rangesIndex = 0;
-
- for ( ; offset >= _ranges.v[rangesIndex].length; rangesIndex++ )
- {
- offset -= _ranges.v[rangesIndex].length; // (make offset relative)
- }
-
- if ( _task == 0 ) // (physical memory?)
- {
- address = _ranges.v[rangesIndex].address + offset;
- length = _ranges.v[rangesIndex].length - offset;
-
- for ( ++rangesIndex; rangesIndex < _rangesCount; rangesIndex++ )
- {
- if ( address + length != _ranges.v[rangesIndex].address ) break;
-
- length += _ranges.v[rangesIndex].length; // (coalesce ranges)
- }
- }
- else // (virtual memory?)
- {
- vm_address_t addressVirtual = _ranges.v[rangesIndex].address + offset;
-
- assert((0 == (kIOMemoryRequiresWire & _flags)) || _wireCount);
-
- address = pmap_extract_safe(_task, addressVirtual);
- length = next_page(addressVirtual) - addressVirtual;
- length = min(_ranges.v[rangesIndex].length - offset, length);
- }
-
- assert(address);
- if ( address == 0 ) length = 0;
+ IOByteCount origLen;
+
+ phys64 = gIOSystemMapper->mapAddr(phys32);
+ origLen = *lengthOfSegment;
+ length = page_size - (phys64 & (page_size - 1));
+ while ((length < origLen)
+ && ((phys64 + length) == gIOSystemMapper->mapAddr(phys32 + length)))
+ length += page_size;
+ if (length > origLen)
+ length = origLen;
+
+ *lengthOfSegment = length;
}
+ else
+ phys64 = (addr64_t) phys32;
- if ( lengthOfSegment ) *lengthOfSegment = length;
-
- return address;
+ return phys64;
}
-IOPhysicalAddress IOGeneralMemoryDescriptor::getSourceSegment( IOByteCount offset,
- IOByteCount * lengthOfSegment )
+IOPhysicalAddress IOGeneralMemoryDescriptor::getSourceSegment
+ (IOByteCount offset, IOByteCount *lengthOfSegment)
{
IOPhysicalAddress address = 0;
IOPhysicalLength length = 0;
assert(offset <= _length);
+ if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypeUPL)
+ return super::getSourceSegment( offset, lengthOfSegment );
+
if ( offset < _length ) // (within bounds?)
{
unsigned rangesIndex = 0;
/* DEPRECATED */ void * IOGeneralMemoryDescriptor::getVirtualSegment(IOByteCount offset,
/* DEPRECATED */ IOByteCount * lengthOfSegment)
/* DEPRECATED */ {
-/* DEPRECATED */ if( offset != _position)
-/* DEPRECATED */ setPosition( offset );
-/* DEPRECATED */
-/* DEPRECATED */ assert(_position <= _length);
-/* DEPRECATED */
-/* DEPRECATED */ /* Fail gracefully if the position is at (or past) the end-of-buffer. */
-/* DEPRECATED */ if (_position >= _length)
-/* DEPRECATED */ {
-/* DEPRECATED */ *lengthOfSegment = 0;
-/* DEPRECATED */ return 0;
-/* DEPRECATED */ }
-/* DEPRECATED */
-/* DEPRECATED */ /* Compute the relative length to the end of this virtual segment. */
-/* DEPRECATED */ *lengthOfSegment = _ranges.v[_positionAtIndex].length - _positionAtOffset;
-/* DEPRECATED */
-/* DEPRECATED */ /* Compute the relative address of this virtual segment. */
-/* DEPRECATED */ if (_task == kernel_task)
-/* DEPRECATED */ return (void *)(_ranges.v[_positionAtIndex].address + _positionAtOffset);
-/* DEPRECATED */ else
-/* DEPRECATED */ {
-/* DEPRECATED */ vm_offset_t off;
-/* DEPRECATED */
-/* DEPRECATED */ mapIntoKernel(_positionAtIndex);
-/* DEPRECATED */
-/* DEPRECATED */ off = _ranges.v[_kernPtrAtIndex].address;
-/* DEPRECATED */ off -= trunc_page(off);
-/* DEPRECATED */
-/* DEPRECATED */ return (void *) (_kernPtrAligned + off + _positionAtOffset);
-/* DEPRECATED */ }
+ if (_task == kernel_task)
+ return (void *) getSourceSegment(offset, lengthOfSegment);
+ else
+ panic("IOGMD::getVirtualSegment deprecated");
+
+ return 0;
/* DEPRECATED */ }
/* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
-/*
- * 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,
+ int *flags,
+ int force_data_sync)
{
- UInt rangeIndex = 0;
+ unsigned int pageCount, page;
+ ppnum_t phys;
- 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;
+ 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;
+ }
- switch (forDirection)
- {
- case kIODirectionIn:
- access = VM_PROT_WRITE;
- break;
+ return ((page >= pageCount) ? kIOReturnSuccess : kIOReturnVMError);
+}
- case kIODirectionOut:
- access = VM_PROT_READ;
- break;
+IOReturn IOGeneralMemoryDescriptor::wireVirtual(IODirection forDirection)
+{
+ IOReturn error = kIOReturnNoMemory;
+ ioGMDData *dataP;
+ ppnum_t mapBase = 0;
+ IOMapper *mapper;
+ ipc_port_t sharedMem = (ipc_port_t) _memEntry;
- default:
- access = VM_PROT_READ | VM_PROT_WRITE;
- break;
- }
+ assert(!_wireCount);
- //
- // Check user read/write access to the data buffer.
- //
+ if (_pages >= gIOMaximumMappedIOPageCount)
+ return kIOReturnNoResources;
- 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 );
+ dataP = getDataP(_memoryEntries);
+ mapper = dataP->fMapper;
+ if (mapper && _pages)
+ mapBase = mapper->iovmAlloc(_pages);
- 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;
- }
+ // 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.
- assert((regionSize & PAGE_MASK) == 0);
-
- regionSize = min(regionSize, checkSize);
- checkSize -= regionSize;
- checkBase += regionSize;
- } // (for each vm region)
- } // (for each io range)
-
- 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);
-
- vm_map_t taskVMMap = getMapForTask(_task, srcAlign);
-
- // 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);
- }
+ if (forDirection == kIODirectionNone)
+ forDirection = _direction;
+
+ int uplFlags; // This Mem Desc's default flags for upl creation
+ switch (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;
+
+ //
+ // Check user read/write access to the data buffer.
+ //
+ unsigned int pageIndex = 0;
+ IOByteCount mdOffset = 0;
+ vm_map_t curMap;
+ if (_task == kernel_task && (kIOMemoryBufferPageable & _flags))
+ curMap = 0;
+ else
+ { curMap = get_task_map(_task); }
+
+ for (UInt range = 0; range < _rangesCount; range++) {
+ ioPLBlock iopl;
+ IOVirtualRange curRange = _ranges.v[range];
+ vm_address_t startPage;
+ IOByteCount numBytes;
+
+ startPage = trunc_page_32(curRange.address);
+ iopl.fPageOffset = (short) curRange.address & PAGE_MASK;
+ if (mapper)
+ iopl.fMappedBase = mapBase + pageIndex;
+ else
+ iopl.fMappedBase = 0;
+ numBytes = iopl.fPageOffset + curRange.length;
+
+ while (numBytes) {
+ dataP = getDataP(_memoryEntries);
+ vm_map_t theMap =
+ (curMap)? curMap
+ : IOPageableMapForAddress(startPage);
+ 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) && (startPage < io_kernel_static_end))
+ {
+ error = io_get_kernel_static_upl(theMap,
+ startPage,
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &ioplFlags,
+ false);
+
+ } else if (sharedMem && (kIOMemoryPersistent & _flags)) {
+
+ error = memory_object_iopl_request(sharedMem,
+ ptoa_32(pageIndex),
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &ioplFlags);
+
+ } else {
+ error = vm_map_get_upl(theMap,
+ startPage,
+ &ioplSize,
+ &iopl.fIOPL,
+ baseInfo,
+ &numPageInfo,
+ &ioplFlags,
+ false);
}
- 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;
+ assert(ioplSize);
+ if (error != KERN_SUCCESS)
+ goto abortExit;
+
+ 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)
+ {
+ kernel_upl_commit(iopl.fIOPL, 0, 0);
+ iopl.fIOPL = 0;
}
+
+ if (!_memoryEntries->appendBytes(&iopl, sizeof(iopl))) {
+ // Clean up partial created and unsaved iopl
+ if (iopl.fIOPL)
+ kernel_upl_abort(iopl.fIOPL, 0);
+ 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;
-
-
- 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);
+ {
+ dataP = getDataP(_memoryEntries);
+ UInt done = getNumIOPL(dataP, _memoryEntries->getLength());
+ ioPLBlock *ioplList = getIOPLList(dataP);
+
+ for (UInt range = 0; range < done; range++)
+ {
+ if (ioplList[range].fIOPL)
+ kernel_upl_abort(ioplList[range].fIOPL, 0);
+ }
- 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;
+}
- 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;
+/*
+ * 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;
+
+ if (!_wireCount && (_flags & kIOMemoryTypeMask) == kIOMemoryTypeVirtual) {
+ 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(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 (!_wireCount) {
+ if ((_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical) {
+ /* kIOMemoryTypePhysical */
+ // DO NOTHING
}
+ else {
+ ioGMDData * dataP = getDataP(_memoryEntries);
+ ioPLBlock *ioplList = getIOPLList(dataP);
+ UInt count = getNumIOPL(dataP, _memoryEntries->getLength());
+
+ 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 ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypeVirtual) {
+ for (UInt ind = 0; ind < count; ind++)
+ if (ioplList[ind].fIOPL)
+ kernel_upl_commit(ioplList[ind].fIOPL, 0, 0);
+ }
- 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;
- }
+ (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;
if( 0 == sharedMem) {
- vm_size_t size = 0;
-
- for (unsigned index = 0; index < _rangesCount; index++)
- size += round_page(_ranges.v[index].address + _ranges.v[index].length)
- - trunc_page(_ranges.v[index].address);
+ vm_size_t size = _pages << PAGE_SHIFT;
if( _task) {
#ifndef i386
VM_PROT_READ | VM_PROT_WRITE, &sharedMem,
NULL );
- if( (KERN_SUCCESS == kr) && (actualSize != round_page(size))) {
+ if( (KERN_SUCCESS == kr) && (actualSize != round_page_32(size))) {
#if IOASSERT
- IOLog("mach_make_memory_entry_64 (%08lx) size (%08lx:%08lx)\n",
+ IOLog("mach_make_memory_entry_64 (%08x) size (%08lx:%08x)\n",
_ranges.v[0].address, (UInt32)actualSize, size);
#endif
kr = kIOReturnVMError;
} else do {
- memory_object_t pager;
- unsigned int flags=0;
- struct phys_entry *pp;
- IOPhysicalAddress pa;
+ memory_object_t pager;
+ unsigned int flags = 0;
+ addr64_t pa;
IOPhysicalLength segLen;
- pa = getPhysicalSegment( sourceOffset, &segLen );
+ pa = getPhysicalSegment64( sourceOffset, &segLen );
if( !reserved) {
reserved = IONew( ExpansionData, 1 );
reserved->pagerContig = (1 == _rangesCount);
reserved->memory = this;
-#ifndef i386
- switch(options & kIOMapCacheMask ) { /*What cache mode do we need*/
+ /*What cache mode do we need*/
+ switch(options & kIOMapCacheMask ) {
case kIOMapDefaultCache:
default:
- if((pp = pmap_find_physentry(pa))) {/* Find physical address */
- /* Use physical attributes as default */
- flags = IOTranslateCacheBits(pp);
-
- }
- else { /* If no physical, just hard code attributes */
- flags = DEVICE_PAGER_CACHE_INHIB |
- DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
- }
- break;
+ flags = IODefaultCacheBits(pa);
+ break;
case kIOMapInhibitCache:
- flags = DEVICE_PAGER_CACHE_INHIB |
- DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
- break;
+ 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;
+ flags = DEVICE_PAGER_WRITE_THROUGH |
+ DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
+ break;
case kIOMapCopybackCache:
- flags = DEVICE_PAGER_COHERENT;
- break;
+ flags = DEVICE_PAGER_COHERENT;
+ break;
+
+ case kIOMapWriteCombineCache:
+ flags = DEVICE_PAGER_CACHE_INHIB |
+ DEVICE_PAGER_COHERENT;
+ break;
}
flags |= reserved->pagerContig ? DEVICE_PAGER_CONTIGUOUS : 0;
-#else
- flags = reserved->pagerContig ? DEVICE_PAGER_CONTIGUOUS : 0;
-#endif
pager = device_pager_setup( (memory_object_t) 0, (int) reserved,
size, flags);
IOByteCount length )
{
// could be much better
- if( _task && (addressMap == getMapForTask(_task, _ranges.v[0].address)) && (1 == _rangesCount)
+ if( _task && (addressMap == get_task_map(_task)) && (1 == _rangesCount)
&& (logical == _ranges.v[0].address)
&& (length <= _ranges.v[0].length) )
return( kIOReturnSuccess );
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 */,
prot, // cur
prot, // max
VM_INHERIT_NONE);
-
+
if( KERN_SUCCESS != err) {
ref->mapped = 0;
continue;
vm_map_t addressMap,
IOVirtualAddress * atAddress,
IOOptionBits options,
- IOByteCount sourceOffset = 0,
- IOByteCount length = 0 )
+ IOByteCount sourceOffset,
+ IOByteCount length )
{
IOReturn err = kIOReturnSuccess;
memory_object_t pager;
sourceAddr = getSourceSegment( sourceOffset, NULL );
assert( sourceAddr );
- pageOffset = sourceAddr - trunc_page( sourceAddr );
+ pageOffset = sourceAddr - trunc_page_32( sourceAddr );
- ref.size = round_page( length + pageOffset );
+ ref.size = round_page_32( length + pageOffset );
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( logical );
+ ref.mapped = trunc_page_32( logical );
if( (logical - ref.mapped) != pageOffset) {
err = kIOReturnVMError;
continue;
}
}
- if( ref.sharedMem && (addressMap == kernel_map) && (kIOMemoryRequiresWire & _flags))
+ if( ref.sharedMem && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
err = IOIteratePageableMaps( ref.size, &IOMemoryDescriptorMapAlloc, &ref );
else
err = IOMemoryDescriptorMapAlloc( addressMap, &ref );
vm_size_t bytes;
vm_size_t page;
IOByteCount pageOffset;
+ IOByteCount pagerOffset;
IOPhysicalLength segLen;
- IOPhysicalAddress physAddr;
+ addr64_t physAddr;
if( !addressMap) {
return( kIOReturnSuccess );
}
- physAddr = getPhysicalSegment( sourceOffset, &segLen );
+ physAddr = getPhysicalSegment64( sourceOffset, &segLen );
assert( physAddr );
- pageOffset = physAddr - trunc_page( physAddr );
+ pageOffset = physAddr - trunc_page_64( physAddr );
+ pagerOffset = sourceOffset;
size = length + pageOffset;
physAddr -= pageOffset;
// 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)
- IOLog("_IOMemoryMap::map(%p) %08lx->%08lx:%08lx\n",
+ IOLog("_IOMemoryMap::map(%p) %08lx->%08qx:%08lx\n",
addressMap, address + pageOffset, physAddr + pageOffset,
segLen - pageOffset);
#endif
#ifdef i386
/* i386 doesn't support faulting on device memory yet */
if( addressMap && (kIOReturnSuccess == err))
- err = IOMapPages( addressMap, address, physAddr, segLen, options );
+ err = IOMapPages( addressMap, address, (IOPhysicalAddress) physAddr, segLen, options );
assert( KERN_SUCCESS == err );
if( err)
break;
if( pager) {
if( reserved && reserved->pagerContig) {
IOPhysicalLength allLen;
- IOPhysicalAddress allPhys;
+ addr64_t allPhys;
- allPhys = getPhysicalSegment( 0, &allLen );
+ allPhys = getPhysicalSegment64( 0, &allLen );
assert( allPhys );
- err = device_pager_populate_object( pager, 0, trunc_page(allPhys), round_page(allLen) );
+ err = device_pager_populate_object( pager, 0, allPhys >> PAGE_SHIFT, round_page_32(allLen) );
} else {
- for( page = 0;
+ for( page = 0;
(page < segLen) && (KERN_SUCCESS == err);
page += page_size) {
- err = device_pager_populate_object( pager, sourceOffset + page,
- physAddr + 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 );
pageOffset = 0;
} while( bytes
- && (physAddr = getPhysicalSegment( sourceOffset, &segLen )));
+ && (physAddr = getPhysicalSegment64( sourceOffset, &segLen )));
if( bytes)
err = kIOReturnBadArgument;
if( true /* && (addressMap == kernel_map) || (addressMap == get_task_map(current_task()))*/) {
- if( _memEntry && (addressMap == kernel_map) && (kIOMemoryRequiresWire & _flags))
+ if( _memEntry && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
addressMap = IOPageableMapForAddress( logical );
err = vm_deallocate( addressMap, logical, length );
// 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 = 0) const
+void _IOMemoryMap::taggedRelease(const void *tag) const
{
+ LOCK;
super::taggedRelease(tag, 2);
+ UNLOCK;
}
void _IOMemoryMap::free()
{
_IOMemoryMap * mapping;
- if( (!task) || (task != getAddressTask()))
+ if( (!task) || (!addressMap) || (addressMap != get_task_map(task)))
return( 0 );
if( (options ^ _options) & kIOMapReadOnly)
return( 0 );
{
if( 0 == gIOMemoryLock)
gIOMemoryLock = IORecursiveLockAlloc();
+
+ IORegistryEntry::getRegistryRoot()->setProperty(kIOMaximumMappedIOByteCountKey,
+ ptoa_64(gIOMaximumMappedIOPageCount), 64);
}
void IOMemoryDescriptor::free( void )
IOMemoryMap * IOMemoryDescriptor::setMapping(
task_t intoTask,
IOVirtualAddress mapAddress,
- IOOptionBits options = 0 )
+ IOOptionBits options )
{
_IOMemoryMap * map;
}
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();
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 );
}
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::prepare(
- IODirection forDirection = kIODirectionNone)
+ IODirection forDirection)
{
IOReturn err;
}
IOReturn IOSubMemoryDescriptor::complete(
- IODirection forDirection = kIODirectionNone)
+ IODirection forDirection)
{
IOReturn err;
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 );
}
{
OSSymbol const *keys[2];
OSObject *values[2];
- OSDictionary *dict;
IOVirtualRange *vcopy;
unsigned int index, nRanges;
bool result;
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 0);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 1);
-OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 2);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 1);
+OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 2);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 3);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 4);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 5);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 14);
OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 15);
-/* inline function implementation */
+/* ex-inline function implementation */
IOPhysicalAddress IOMemoryDescriptor::getPhysicalAddress()
{ return( getPhysicalSegment( 0, 0 )); }
projects / apple / xnu.git / blobdiff