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1 /*
2 * Copyright (c) 1998-2004 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the
10 * License may not be used to create, or enable the creation or
11 * redistribution of, unlawful or unlicensed copies of an Apple operating
12 * system, or to circumvent, violate, or enable the circumvention or
13 * violation of, any terms of an Apple operating system software license
14 * agreement.
15 *
16 * Please obtain a copy of the License at
17 * http://www.opensource.apple.com/apsl/ and read it before using this
18 * file.
19 *
20 * The Original Code and all software distributed under the License are
21 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
22 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
23 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
25 * Please see the License for the specific language governing rights and
26 * limitations under the License.
27 *
28 * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
29 */
30 /*
31 * Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
32 *
33 * HISTORY
34 *
35 */
36 // 45678901234567890123456789012345678901234567890123456789012345678901234567890
37 #include <sys/cdefs.h>
38
39 #include <IOKit/assert.h>
40 #include <IOKit/system.h>
41 #include <IOKit/IOLib.h>
42 #include <IOKit/IOMemoryDescriptor.h>
43 #include <IOKit/IOMapper.h>
44 #include <IOKit/IOKitKeysPrivate.h>
45
46 #include <IOKit/IOKitDebug.h>
47
48 #include "IOKitKernelInternal.h"
49 #include "IOCopyMapper.h"
50
51 #include <libkern/c++/OSContainers.h>
52 #include <libkern/c++/OSDictionary.h>
53 #include <libkern/c++/OSArray.h>
54 #include <libkern/c++/OSSymbol.h>
55 #include <libkern/c++/OSNumber.h>
56
57 #include <sys/uio.h>
58
59 __BEGIN_DECLS
60 #include <vm/pmap.h>
61 #include <vm/vm_pageout.h>
62 #include <vm/vm_shared_memory_server.h>
63 #include <mach/memory_object_types.h>
64 #include <device/device_port.h>
65
66 #include <mach/vm_prot.h>
67 #include <vm/vm_fault.h>
68
69 extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
70 void ipc_port_release_send(ipc_port_t port);
71
72 /* Copy between a physical page and a virtual address in the given vm_map */
73 kern_return_t copypv(addr64_t source, addr64_t sink, unsigned int size, int which);
74
75 memory_object_t
76 device_pager_setup(
77 memory_object_t pager,
78 int device_handle,
79 vm_size_t size,
80 int flags);
81 void
82 device_pager_deallocate(
83 memory_object_t);
84 kern_return_t
85 device_pager_populate_object(
86 memory_object_t pager,
87 vm_object_offset_t offset,
88 ppnum_t phys_addr,
89 vm_size_t size);
90 kern_return_t
91 memory_object_iopl_request(
92 ipc_port_t port,
93 memory_object_offset_t offset,
94 vm_size_t *upl_size,
95 upl_t *upl_ptr,
96 upl_page_info_array_t user_page_list,
97 unsigned int *page_list_count,
98 int *flags);
99
100 unsigned int IOTranslateCacheBits(struct phys_entry *pp);
101
102 __END_DECLS
103
104 #define kIOMaximumMappedIOByteCount (512*1024*1024)
105
106 static IOMapper * gIOSystemMapper = NULL;
107
108 IOCopyMapper * gIOCopyMapper = NULL;
109
110 static ppnum_t gIOMaximumMappedIOPageCount = atop_32(kIOMaximumMappedIOByteCount);
111
112 ppnum_t gIOLastPage;
113
114 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
115
116 OSDefineMetaClassAndAbstractStructors( IOMemoryDescriptor, OSObject )
117
118 #define super IOMemoryDescriptor
119
120 OSDefineMetaClassAndStructors(IOGeneralMemoryDescriptor, IOMemoryDescriptor)
121
122 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
123
124 static IORecursiveLock * gIOMemoryLock;
125
126 #define LOCK IORecursiveLockLock( gIOMemoryLock)
127 #define UNLOCK IORecursiveLockUnlock( gIOMemoryLock)
128 #define SLEEP IORecursiveLockSleep( gIOMemoryLock, (void *)this, THREAD_UNINT)
129 #define WAKEUP \
130 IORecursiveLockWakeup( gIOMemoryLock, (void *)this, /* one-thread */ false)
131
132 #if 0
133 #define DEBG(fmt, args...) { kprintf(fmt, ## args); }
134 #else
135 #define DEBG(fmt, args...) {}
136 #endif
137
138 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
139
140 class _IOMemoryMap : public IOMemoryMap
141 {
142 OSDeclareDefaultStructors(_IOMemoryMap)
143 public:
144 IOMemoryDescriptor * memory;
145 IOMemoryMap * superMap;
146 IOByteCount offset;
147 IOByteCount length;
148 IOVirtualAddress logical;
149 task_t addressTask;
150 vm_map_t addressMap;
151 IOOptionBits options;
152 upl_t redirUPL;
153 ipc_port_t redirEntry;
154 IOMemoryDescriptor * owner;
155
156 protected:
157 virtual void taggedRelease(const void *tag = 0) const;
158 virtual void free();
159
160 public:
161
162 // IOMemoryMap methods
163 virtual IOVirtualAddress getVirtualAddress();
164 virtual IOByteCount getLength();
165 virtual task_t getAddressTask();
166 virtual IOMemoryDescriptor * getMemoryDescriptor();
167 virtual IOOptionBits getMapOptions();
168
169 virtual IOReturn unmap();
170 virtual void taskDied();
171
172 virtual IOReturn redirect(IOMemoryDescriptor * newBackingMemory,
173 IOOptionBits options,
174 IOByteCount offset = 0);
175
176 virtual IOPhysicalAddress getPhysicalSegment(IOByteCount offset,
177 IOByteCount * length);
178
179 // for IOMemoryDescriptor use
180 _IOMemoryMap * copyCompatible(
181 IOMemoryDescriptor * owner,
182 task_t intoTask,
183 IOVirtualAddress toAddress,
184 IOOptionBits options,
185 IOByteCount offset,
186 IOByteCount length );
187
188 bool initCompatible(
189 IOMemoryDescriptor * memory,
190 IOMemoryMap * superMap,
191 IOByteCount offset,
192 IOByteCount length );
193
194 bool initWithDescriptor(
195 IOMemoryDescriptor * memory,
196 task_t intoTask,
197 IOVirtualAddress toAddress,
198 IOOptionBits options,
199 IOByteCount offset,
200 IOByteCount length );
201
202 IOReturn redirect(
203 task_t intoTask, bool redirect );
204 };
205
206 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
207
208 // Some data structures and accessor macros used by the initWithOptions
209 // Function
210
211 enum ioPLBlockFlags {
212 kIOPLOnDevice = 0x00000001,
213 kIOPLExternUPL = 0x00000002,
214 };
215
216 struct typePersMDData
217 {
218 const IOGeneralMemoryDescriptor *fMD;
219 ipc_port_t fMemEntry;
220 };
221
222 struct ioPLBlock {
223 upl_t fIOPL;
224 vm_address_t fIOMDOffset; // The offset of this iopl in descriptor
225 vm_offset_t fPageInfo; // Pointer to page list or index into it
226 ppnum_t fMappedBase; // Page number of first page in this iopl
227 unsigned int fPageOffset; // Offset within first page of iopl
228 unsigned int fFlags; // Flags
229 };
230
231 struct ioGMDData {
232 IOMapper *fMapper;
233 unsigned int fPageCnt;
234 upl_page_info_t fPageList[];
235 ioPLBlock fBlocks[];
236 };
237
238 #define getDataP(osd) ((ioGMDData *) (osd)->getBytesNoCopy())
239 #define getIOPLList(d) ((ioPLBlock *) &(d->fPageList[d->fPageCnt]))
240 #define getNumIOPL(osd, d) \
241 (((osd)->getLength() - ((char *) getIOPLList(d) - (char *) d)) / sizeof(ioPLBlock))
242 #define getPageList(d) (&(d->fPageList[0]))
243 #define computeDataSize(p, u) \
244 (sizeof(ioGMDData) + p * sizeof(upl_page_info_t) + u * sizeof(ioPLBlock))
245
246
247 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
248
249 #define next_page(a) ( trunc_page_32(a) + PAGE_SIZE )
250
251
252 extern "C" {
253
254 kern_return_t device_data_action(
255 int device_handle,
256 ipc_port_t device_pager,
257 vm_prot_t protection,
258 vm_object_offset_t offset,
259 vm_size_t size)
260 {
261 struct ExpansionData {
262 void * devicePager;
263 unsigned int pagerContig:1;
264 unsigned int unused:31;
265 IOMemoryDescriptor * memory;
266 };
267 kern_return_t kr;
268 ExpansionData * ref = (ExpansionData *) device_handle;
269 IOMemoryDescriptor * memDesc;
270
271 LOCK;
272 memDesc = ref->memory;
273 if( memDesc)
274 {
275 memDesc->retain();
276 kr = memDesc->handleFault( device_pager, 0, 0,
277 offset, size, kIOMapDefaultCache /*?*/);
278 memDesc->release();
279 }
280 else
281 kr = KERN_ABORTED;
282 UNLOCK;
283
284 return( kr );
285 }
286
287 kern_return_t device_close(
288 int device_handle)
289 {
290 struct ExpansionData {
291 void * devicePager;
292 unsigned int pagerContig:1;
293 unsigned int unused:31;
294 IOMemoryDescriptor * memory;
295 };
296 ExpansionData * ref = (ExpansionData *) device_handle;
297
298 IODelete( ref, ExpansionData, 1 );
299
300 return( kIOReturnSuccess );
301 }
302 }; // end extern "C"
303
304 // Note this inline function uses C++ reference arguments to return values
305 // This means that pointers are not passed and NULLs don't have to be
306 // checked for as a NULL reference is illegal.
307 static inline void
308 getAddrLenForInd(addr64_t &addr, IOPhysicalLength &len, // Output variables
309 UInt32 type, IOGeneralMemoryDescriptor::Ranges r, UInt32 ind)
310 {
311 assert(kIOMemoryTypeUIO == type
312 || kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type
313 || kIOMemoryTypePhysical == type || kIOMemoryTypePhysical64 == type);
314 if (kIOMemoryTypeUIO == type) {
315 user_size_t us;
316 uio_getiov((uio_t) r.uio, ind, &addr, &us); len = us;
317 }
318 else if ((kIOMemoryTypeVirtual64 == type) || (kIOMemoryTypePhysical64 == type)) {
319 IOAddressRange cur = r.v64[ind];
320 addr = cur.address;
321 len = cur.length;
322 }
323 else {
324 IOVirtualRange cur = r.v[ind];
325 addr = cur.address;
326 len = cur.length;
327 }
328 }
329
330 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
331
332 /*
333 * withAddress:
334 *
335 * Create a new IOMemoryDescriptor. The buffer is a virtual address
336 * relative to the specified task. If no task is supplied, the kernel
337 * task is implied.
338 */
339 IOMemoryDescriptor *
340 IOMemoryDescriptor::withAddress(void * address,
341 IOByteCount length,
342 IODirection direction)
343 {
344 return IOMemoryDescriptor::
345 withAddress((vm_address_t) address, length, direction, kernel_task);
346 }
347
348 IOMemoryDescriptor *
349 IOMemoryDescriptor::withAddress(vm_address_t address,
350 IOByteCount length,
351 IODirection direction,
352 task_t task)
353 {
354 #if TEST_V64
355 if (task)
356 {
357 IOOptionBits options = (IOOptionBits) direction;
358 if (task == kernel_task)
359 options |= kIOMemoryAutoPrepare;
360 return (IOMemoryDescriptor::withAddressRange(address, length, options, task));
361 }
362 #endif
363 IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
364 if (that)
365 {
366 if (that->initWithAddress(address, length, direction, task))
367 return that;
368
369 that->release();
370 }
371 return 0;
372 }
373
374 IOMemoryDescriptor *
375 IOMemoryDescriptor::withPhysicalAddress(
376 IOPhysicalAddress address,
377 IOByteCount length,
378 IODirection direction )
379 {
380 #if TEST_P64
381 return (IOMemoryDescriptor::withAddressRange(address, length, (IOOptionBits) direction, NULL));
382 #endif
383 IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
384 if (self
385 && !self->initWithPhysicalAddress(address, length, direction)) {
386 self->release();
387 return 0;
388 }
389
390 return self;
391 }
392
393 IOMemoryDescriptor *
394 IOMemoryDescriptor::withRanges( IOVirtualRange * ranges,
395 UInt32 withCount,
396 IODirection direction,
397 task_t task,
398 bool asReference)
399 {
400 IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
401 if (that)
402 {
403 if (that->initWithRanges(ranges, withCount, direction, task, asReference))
404 return that;
405
406 that->release();
407 }
408 return 0;
409 }
410
411 IOMemoryDescriptor *
412 IOMemoryDescriptor::withAddressRange(mach_vm_address_t address,
413 mach_vm_size_t length,
414 IOOptionBits options,
415 task_t task)
416 {
417 IOAddressRange range = { address, length };
418 return (IOMemoryDescriptor::withAddressRanges(&range, 1, options, task));
419 }
420
421 IOMemoryDescriptor *
422 IOMemoryDescriptor::withAddressRanges(IOAddressRange * ranges,
423 UInt32 rangeCount,
424 IOOptionBits options,
425 task_t task)
426 {
427 IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
428 if (that)
429 {
430 if (task)
431 options |= kIOMemoryTypeVirtual64;
432 else
433 options |= kIOMemoryTypePhysical64;
434
435 if (that->initWithOptions(ranges, rangeCount, 0, task, options, /* mapper */ 0))
436 return that;
437
438 that->release();
439 }
440
441 return 0;
442 }
443
444
445 /*
446 * withRanges:
447 *
448 * Create a new IOMemoryDescriptor. The buffer is made up of several
449 * virtual address ranges, from a given task.
450 *
451 * Passing the ranges as a reference will avoid an extra allocation.
452 */
453 IOMemoryDescriptor *
454 IOMemoryDescriptor::withOptions(void * buffers,
455 UInt32 count,
456 UInt32 offset,
457 task_t task,
458 IOOptionBits opts,
459 IOMapper * mapper)
460 {
461 IOGeneralMemoryDescriptor *self = new IOGeneralMemoryDescriptor;
462
463 if (self
464 && !self->initWithOptions(buffers, count, offset, task, opts, mapper))
465 {
466 self->release();
467 return 0;
468 }
469
470 return self;
471 }
472
473 // Can't leave abstract but this should never be used directly,
474 bool IOMemoryDescriptor::initWithOptions(void * buffers,
475 UInt32 count,
476 UInt32 offset,
477 task_t task,
478 IOOptionBits options,
479 IOMapper * mapper)
480 {
481 // @@@ gvdl: Should I panic?
482 panic("IOMD::initWithOptions called\n");
483 return 0;
484 }
485
486 IOMemoryDescriptor *
487 IOMemoryDescriptor::withPhysicalRanges( IOPhysicalRange * ranges,
488 UInt32 withCount,
489 IODirection direction,
490 bool asReference)
491 {
492 IOGeneralMemoryDescriptor * that = new IOGeneralMemoryDescriptor;
493 if (that)
494 {
495 if (that->initWithPhysicalRanges(ranges, withCount, direction, asReference))
496 return that;
497
498 that->release();
499 }
500 return 0;
501 }
502
503 IOMemoryDescriptor *
504 IOMemoryDescriptor::withSubRange(IOMemoryDescriptor * of,
505 IOByteCount offset,
506 IOByteCount length,
507 IODirection direction)
508 {
509 IOSubMemoryDescriptor *self = new IOSubMemoryDescriptor;
510
511 if (self && !self->initSubRange(of, offset, length, direction)) {
512 self->release();
513 self = 0;
514 }
515 return self;
516 }
517
518 IOMemoryDescriptor *
519 IOMemoryDescriptor::withPersistentMemoryDescriptor(IOMemoryDescriptor *originalMD)
520 {
521 IOGeneralMemoryDescriptor *origGenMD =
522 OSDynamicCast(IOGeneralMemoryDescriptor, originalMD);
523
524 if (origGenMD)
525 return IOGeneralMemoryDescriptor::
526 withPersistentMemoryDescriptor(origGenMD);
527 else
528 return 0;
529 }
530
531 IOMemoryDescriptor *
532 IOGeneralMemoryDescriptor::withPersistentMemoryDescriptor(IOGeneralMemoryDescriptor *originalMD)
533 {
534 ipc_port_t sharedMem = (ipc_port_t) originalMD->createNamedEntry();
535
536 if (!sharedMem)
537 return 0;
538
539 if (sharedMem == originalMD->_memEntry) {
540 originalMD->retain(); // Add a new reference to ourselves
541 ipc_port_release_send(sharedMem); // Remove extra send right
542 return originalMD;
543 }
544
545 IOGeneralMemoryDescriptor * self = new IOGeneralMemoryDescriptor;
546 typePersMDData initData = { originalMD, sharedMem };
547
548 if (self
549 && !self->initWithOptions(&initData, 1, 0, 0, kIOMemoryTypePersistentMD, 0)) {
550 self->release();
551 self = 0;
552 }
553 return self;
554 }
555
556 void *IOGeneralMemoryDescriptor::createNamedEntry()
557 {
558 kern_return_t error;
559 ipc_port_t sharedMem;
560
561 IOOptionBits type = _flags & kIOMemoryTypeMask;
562
563 user_addr_t range0Addr;
564 IOByteCount range0Len;
565 getAddrLenForInd(range0Addr, range0Len, type, _ranges, 0);
566 range0Addr = trunc_page_64(range0Addr);
567
568 vm_size_t size = ptoa_32(_pages);
569 vm_address_t kernelPage = (vm_address_t) range0Addr;
570
571 vm_map_t theMap = ((_task == kernel_task)
572 && (kIOMemoryBufferPageable & _flags))
573 ? IOPageableMapForAddress(kernelPage)
574 : get_task_map(_task);
575
576 memory_object_size_t actualSize = size;
577 vm_prot_t prot = VM_PROT_READ | VM_PROT_WRITE;
578 if (_memEntry)
579 prot |= MAP_MEM_NAMED_REUSE;
580
581 error = mach_make_memory_entry_64(theMap,
582 &actualSize, range0Addr, prot, &sharedMem, (ipc_port_t) _memEntry);
583
584 if (KERN_SUCCESS == error) {
585 if (actualSize == size) {
586 return sharedMem;
587 } else {
588 #if IOASSERT
589 IOLog("IOGMD::mach_make_memory_entry_64 (%08llx) size (%08lx:%08x)\n",
590 (UInt64)range0Addr, (UInt32)actualSize, size);
591 #endif
592 ipc_port_release_send( sharedMem );
593 }
594 }
595
596 return MACH_PORT_NULL;
597 }
598
599 /*
600 * initWithAddress:
601 *
602 * Initialize an IOMemoryDescriptor. The buffer is a virtual address
603 * relative to the specified task. If no task is supplied, the kernel
604 * task is implied.
605 *
606 * An IOMemoryDescriptor can be re-used by calling initWithAddress or
607 * initWithRanges again on an existing instance -- note this behavior
608 * is not commonly supported in other I/O Kit classes, although it is
609 * supported here.
610 */
611 bool
612 IOGeneralMemoryDescriptor::initWithAddress(void * address,
613 IOByteCount withLength,
614 IODirection withDirection)
615 {
616 _singleRange.v.address = (vm_address_t) address;
617 _singleRange.v.length = withLength;
618
619 return initWithRanges(&_singleRange.v, 1, withDirection, kernel_task, true);
620 }
621
622 bool
623 IOGeneralMemoryDescriptor::initWithAddress(vm_address_t address,
624 IOByteCount withLength,
625 IODirection withDirection,
626 task_t withTask)
627 {
628 _singleRange.v.address = address;
629 _singleRange.v.length = withLength;
630
631 return initWithRanges(&_singleRange.v, 1, withDirection, withTask, true);
632 }
633
634 bool
635 IOGeneralMemoryDescriptor::initWithPhysicalAddress(
636 IOPhysicalAddress address,
637 IOByteCount withLength,
638 IODirection withDirection )
639 {
640 _singleRange.p.address = address;
641 _singleRange.p.length = withLength;
642
643 return initWithPhysicalRanges( &_singleRange.p, 1, withDirection, true);
644 }
645
646 bool
647 IOGeneralMemoryDescriptor::initWithPhysicalRanges(
648 IOPhysicalRange * ranges,
649 UInt32 count,
650 IODirection direction,
651 bool reference)
652 {
653 IOOptionBits mdOpts = direction | kIOMemoryTypePhysical;
654
655 if (reference)
656 mdOpts |= kIOMemoryAsReference;
657
658 return initWithOptions(ranges, count, 0, 0, mdOpts, /* mapper */ 0);
659 }
660
661 bool
662 IOGeneralMemoryDescriptor::initWithRanges(
663 IOVirtualRange * ranges,
664 UInt32 count,
665 IODirection direction,
666 task_t task,
667 bool reference)
668 {
669 IOOptionBits mdOpts = direction;
670
671 if (reference)
672 mdOpts |= kIOMemoryAsReference;
673
674 if (task) {
675 mdOpts |= kIOMemoryTypeVirtual;
676
677 // Auto-prepare if this is a kernel memory descriptor as very few
678 // clients bother to prepare() kernel memory.
679 // But it was not enforced so what are you going to do?
680 if (task == kernel_task)
681 mdOpts |= kIOMemoryAutoPrepare;
682 }
683 else
684 mdOpts |= kIOMemoryTypePhysical;
685
686 return initWithOptions(ranges, count, 0, task, mdOpts, /* mapper */ 0);
687 }
688
689 /*
690 * initWithOptions:
691 *
692 * IOMemoryDescriptor. The buffer is made up of several virtual address ranges,
693 * from a given task, several physical ranges, an UPL from the ubc
694 * system or a uio (may be 64bit) from the BSD subsystem.
695 *
696 * Passing the ranges as a reference will avoid an extra allocation.
697 *
698 * An IOMemoryDescriptor can be re-used by calling initWithOptions again on an
699 * existing instance -- note this behavior is not commonly supported in other
700 * I/O Kit classes, although it is supported here.
701 */
702
703 bool
704 IOGeneralMemoryDescriptor::initWithOptions(void * buffers,
705 UInt32 count,
706 UInt32 offset,
707 task_t task,
708 IOOptionBits options,
709 IOMapper * mapper)
710 {
711 IOOptionBits type = options & kIOMemoryTypeMask;
712
713 // Grab the original MD's configuation data to initialse the
714 // arguments to this function.
715 if (kIOMemoryTypePersistentMD == type) {
716
717 typePersMDData *initData = (typePersMDData *) buffers;
718 const IOGeneralMemoryDescriptor *orig = initData->fMD;
719 ioGMDData *dataP = getDataP(orig->_memoryEntries);
720
721 // Only accept persistent memory descriptors with valid dataP data.
722 assert(orig->_rangesCount == 1);
723 if ( !(orig->_flags & kIOMemoryPersistent) || !dataP)
724 return false;
725
726 _memEntry = initData->fMemEntry; // Grab the new named entry
727 options = orig->_flags | kIOMemoryAsReference;
728 _singleRange = orig->_singleRange; // Initialise our range
729 buffers = &_singleRange;
730 count = 1;
731
732 // Now grab the original task and whatever mapper was previously used
733 task = orig->_task;
734 mapper = dataP->fMapper;
735
736 // We are ready to go through the original initialisation now
737 }
738
739 switch (type) {
740 case kIOMemoryTypeUIO:
741 case kIOMemoryTypeVirtual:
742 case kIOMemoryTypeVirtual64:
743 assert(task);
744 if (!task)
745 return false;
746 else
747 break;
748
749 case kIOMemoryTypePhysical: // Neither Physical nor UPL should have a task
750 case kIOMemoryTypePhysical64:
751 mapper = kIOMapperNone;
752
753 case kIOMemoryTypeUPL:
754 assert(!task);
755 break;
756 default:
757 return false; /* bad argument */
758 }
759
760 assert(buffers);
761 assert(count);
762
763 /*
764 * We can check the _initialized instance variable before having ever set
765 * it to an initial value because I/O Kit guarantees that all our instance
766 * variables are zeroed on an object's allocation.
767 */
768
769 if (_initialized) {
770 /*
771 * An existing memory descriptor is being retargeted to point to
772 * somewhere else. Clean up our present state.
773 */
774
775 while (_wireCount)
776 complete();
777 if (_ranges.v && _rangesIsAllocated)
778 {
779 if (kIOMemoryTypeUIO == type)
780 uio_free((uio_t) _ranges.v);
781 else if ((kIOMemoryTypeVirtual64 == type) || (kIOMemoryTypePhysical64 == type))
782 IODelete(_ranges.v64, IOAddressRange, _rangesCount);
783 else
784 IODelete(_ranges.v, IOVirtualRange, _rangesCount);
785 }
786 if (_memEntry)
787 { ipc_port_release_send((ipc_port_t) _memEntry); _memEntry = 0; }
788 }
789 else {
790 if (!super::init())
791 return false;
792 _initialized = true;
793 }
794
795 // Grab the appropriate mapper
796 if (mapper == kIOMapperNone)
797 mapper = 0; // No Mapper
798 else if (mapper == kIOMapperSystem) {
799 IOMapper::checkForSystemMapper();
800 gIOSystemMapper = mapper = IOMapper::gSystem;
801 }
802
803 // Remove the dynamic internal use flags from the initial setting
804 options &= ~(kIOMemoryPreparedReadOnly);
805 _flags = options;
806 _task = task;
807
808 // DEPRECATED variable initialisation
809 _direction = (IODirection) (_flags & kIOMemoryDirectionMask);
810
811 __iomd_reservedA = 0;
812 __iomd_reservedB = 0;
813 __iomd_reservedC = 0;
814
815 _highestPage = 0;
816
817 if (kIOMemoryTypeUPL == type) {
818
819 ioGMDData *dataP;
820 unsigned int dataSize = computeDataSize(/* pages */ 0, /* upls */ 1);
821
822 if (!_memoryEntries) {
823 _memoryEntries = OSData::withCapacity(dataSize);
824 if (!_memoryEntries)
825 return false;
826 }
827 else if (!_memoryEntries->initWithCapacity(dataSize))
828 return false;
829
830 _memoryEntries->appendBytes(0, sizeof(ioGMDData));
831 dataP = getDataP(_memoryEntries);
832 dataP->fMapper = mapper;
833 dataP->fPageCnt = 0;
834
835 // _wireCount++; // UPLs start out life wired
836
837 _length = count;
838 _pages += atop_32(offset + count + PAGE_MASK) - atop_32(offset);
839
840 ioPLBlock iopl;
841 upl_page_info_t *pageList = UPL_GET_INTERNAL_PAGE_LIST((upl_t) buffers);
842
843 iopl.fIOPL = (upl_t) buffers;
844 // Set the flag kIOPLOnDevice convieniently equal to 1
845 iopl.fFlags = pageList->device | kIOPLExternUPL;
846 iopl.fIOMDOffset = 0;
847
848 _highestPage = upl_get_highest_page(iopl.fIOPL);
849
850 if (!pageList->device) {
851 // Pre-compute the offset into the UPL's page list
852 pageList = &pageList[atop_32(offset)];
853 offset &= PAGE_MASK;
854 if (mapper) {
855 iopl.fMappedBase = mapper->iovmAlloc(_pages);
856 mapper->iovmInsert(iopl.fMappedBase, 0, pageList, _pages);
857 }
858 else
859 iopl.fMappedBase = 0;
860 }
861 else
862 iopl.fMappedBase = 0;
863 iopl.fPageInfo = (vm_address_t) pageList;
864 iopl.fPageOffset = offset;
865
866 _memoryEntries->appendBytes(&iopl, sizeof(iopl));
867 }
868 else {
869 // kIOMemoryTypeVirtual | kIOMemoryTypeVirtual64 | kIOMemoryTypeUIO
870 // kIOMemoryTypePhysical | kIOMemoryTypePhysical64
871
872 // Initialize the memory descriptor
873 if (options & kIOMemoryAsReference) {
874 _rangesIsAllocated = false;
875
876 // Hack assignment to get the buffer arg into _ranges.
877 // I'd prefer to do _ranges = (Ranges) buffers, but that doesn't
878 // work, C++ sigh.
879 // This also initialises the uio & physical ranges.
880 _ranges.v = (IOVirtualRange *) buffers;
881 }
882 else {
883 _rangesIsAllocated = true;
884 switch (_flags & kIOMemoryTypeMask)
885 {
886 case kIOMemoryTypeUIO:
887 _ranges.v = (IOVirtualRange *) uio_duplicate((uio_t) buffers);
888 break;
889
890 case kIOMemoryTypeVirtual64:
891 case kIOMemoryTypePhysical64:
892 _ranges.v64 = IONew(IOAddressRange, count);
893 if (!_ranges.v64)
894 return false;
895 bcopy(buffers, _ranges.v, count * sizeof(IOAddressRange));
896 break;
897 case kIOMemoryTypeVirtual:
898 _ranges.v = IONew(IOVirtualRange, count);
899 if (!_ranges.v)
900 return false;
901 bcopy(buffers, _ranges.v, count * sizeof(IOVirtualRange));
902 break;
903 }
904 }
905
906 // Find starting address within the vector of ranges
907 Ranges vec = _ranges;
908 UInt32 length = 0;
909 UInt32 pages = 0;
910 for (unsigned ind = 0; ind < count; ind++) {
911 user_addr_t addr;
912 UInt32 len;
913
914 // addr & len are returned by this function
915 getAddrLenForInd(addr, len, type, vec, ind);
916 pages += (atop_64(addr + len + PAGE_MASK) - atop_64(addr));
917 len += length;
918 assert(len >= length); // Check for 32 bit wrap around
919 length = len;
920
921 if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
922 {
923 ppnum_t highPage = atop_64(addr + len - 1);
924 if (highPage > _highestPage)
925 _highestPage = highPage;
926 }
927 }
928 _length = length;
929 _pages = pages;
930 _rangesCount = count;
931
932 // Auto-prepare memory at creation time.
933 // Implied completion when descriptor is free-ed
934 if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type))
935 _wireCount++; // Physical MDs are, by definition, wired
936 else { /* kIOMemoryTypeVirtual | kIOMemoryTypeVirtual64 | kIOMemoryTypeUIO */
937 ioGMDData *dataP;
938 unsigned dataSize = computeDataSize(_pages, /* upls */ count * 2);
939
940 if (!_memoryEntries) {
941 _memoryEntries = OSData::withCapacity(dataSize);
942 if (!_memoryEntries)
943 return false;
944 }
945 else if (!_memoryEntries->initWithCapacity(dataSize))
946 return false;
947
948 _memoryEntries->appendBytes(0, sizeof(ioGMDData));
949 dataP = getDataP(_memoryEntries);
950 dataP->fMapper = mapper;
951 dataP->fPageCnt = _pages;
952
953 if ( (kIOMemoryPersistent & _flags) && !_memEntry)
954 _memEntry = createNamedEntry();
955
956 if ((_flags & kIOMemoryAutoPrepare)
957 && prepare() != kIOReturnSuccess)
958 return false;
959 }
960 }
961
962 return true;
963 }
964
965 /*
966 * free
967 *
968 * Free resources.
969 */
970 void IOGeneralMemoryDescriptor::free()
971 {
972 LOCK;
973 if( reserved)
974 reserved->memory = 0;
975 UNLOCK;
976
977 while (_wireCount)
978 complete();
979 if (_memoryEntries)
980 _memoryEntries->release();
981
982 if (_ranges.v && _rangesIsAllocated)
983 {
984 IOOptionBits type = _flags & kIOMemoryTypeMask;
985 if (kIOMemoryTypeUIO == type)
986 uio_free((uio_t) _ranges.v);
987 else if ((kIOMemoryTypeVirtual64 == type) || (kIOMemoryTypePhysical64 == type))
988 IODelete(_ranges.v64, IOAddressRange, _rangesCount);
989 else
990 IODelete(_ranges.v, IOVirtualRange, _rangesCount);
991 }
992
993 if (reserved && reserved->devicePager)
994 device_pager_deallocate( (memory_object_t) reserved->devicePager );
995
996 // memEntry holds a ref on the device pager which owns reserved
997 // (ExpansionData) so no reserved access after this point
998 if (_memEntry)
999 ipc_port_release_send( (ipc_port_t) _memEntry );
1000
1001 super::free();
1002 }
1003
1004 /* DEPRECATED */ void IOGeneralMemoryDescriptor::unmapFromKernel()
1005 /* DEPRECATED */ {
1006 panic("IOGMD::unmapFromKernel deprecated");
1007 /* DEPRECATED */ }
1008 /* DEPRECATED */
1009 /* DEPRECATED */ void IOGeneralMemoryDescriptor::mapIntoKernel(unsigned rangeIndex)
1010 /* DEPRECATED */ {
1011 panic("IOGMD::mapIntoKernel deprecated");
1012 /* DEPRECATED */ }
1013
1014 /*
1015 * getDirection:
1016 *
1017 * Get the direction of the transfer.
1018 */
1019 IODirection IOMemoryDescriptor::getDirection() const
1020 {
1021 return _direction;
1022 }
1023
1024 /*
1025 * getLength:
1026 *
1027 * Get the length of the transfer (over all ranges).
1028 */
1029 IOByteCount IOMemoryDescriptor::getLength() const
1030 {
1031 return _length;
1032 }
1033
1034 void IOMemoryDescriptor::setTag( IOOptionBits tag )
1035 {
1036 _tag = tag;
1037 }
1038
1039 IOOptionBits IOMemoryDescriptor::getTag( void )
1040 {
1041 return( _tag);
1042 }
1043
1044 // @@@ gvdl: who is using this API? Seems like a wierd thing to implement.
1045 IOPhysicalAddress
1046 IOMemoryDescriptor::getSourceSegment( IOByteCount offset, IOByteCount * length )
1047 {
1048 addr64_t physAddr = 0;
1049
1050 if( prepare() == kIOReturnSuccess) {
1051 physAddr = getPhysicalSegment64( offset, length );
1052 complete();
1053 }
1054
1055 return( (IOPhysicalAddress) physAddr ); // truncated but only page offset is used
1056 }
1057
1058 IOByteCount IOMemoryDescriptor::readBytes
1059 (IOByteCount offset, void *bytes, IOByteCount length)
1060 {
1061 addr64_t dstAddr = (addr64_t) (UInt32) bytes;
1062 IOByteCount remaining;
1063
1064 // Assert that this entire I/O is withing the available range
1065 assert(offset < _length);
1066 assert(offset + length <= _length);
1067 if (offset >= _length) {
1068 IOLog("IOGMD(%p): rB = o%lx, l%lx\n", this, offset, length); // @@@ gvdl
1069 return 0;
1070 }
1071
1072 remaining = length = min(length, _length - offset);
1073 while (remaining) { // (process another target segment?)
1074 addr64_t srcAddr64;
1075 IOByteCount srcLen;
1076
1077 srcAddr64 = getPhysicalSegment64(offset, &srcLen);
1078 if (!srcAddr64)
1079 break;
1080
1081 // Clip segment length to remaining
1082 if (srcLen > remaining)
1083 srcLen = remaining;
1084
1085 copypv(srcAddr64, dstAddr, srcLen,
1086 cppvPsrc | cppvNoRefSrc | cppvFsnk | cppvKmap);
1087
1088 dstAddr += srcLen;
1089 offset += srcLen;
1090 remaining -= srcLen;
1091 }
1092
1093 assert(!remaining);
1094
1095 return length - remaining;
1096 }
1097
1098 IOByteCount IOMemoryDescriptor::writeBytes
1099 (IOByteCount offset, const void *bytes, IOByteCount length)
1100 {
1101 addr64_t srcAddr = (addr64_t) (UInt32) bytes;
1102 IOByteCount remaining;
1103
1104 // Assert that this entire I/O is withing the available range
1105 assert(offset < _length);
1106 assert(offset + length <= _length);
1107
1108 assert( !(kIOMemoryPreparedReadOnly & _flags) );
1109
1110 if ( (kIOMemoryPreparedReadOnly & _flags) || offset >= _length) {
1111 IOLog("IOGMD(%p): wB = o%lx, l%lx\n", this, offset, length); // @@@ gvdl
1112 return 0;
1113 }
1114
1115 remaining = length = min(length, _length - offset);
1116 while (remaining) { // (process another target segment?)
1117 addr64_t dstAddr64;
1118 IOByteCount dstLen;
1119
1120 dstAddr64 = getPhysicalSegment64(offset, &dstLen);
1121 if (!dstAddr64)
1122 break;
1123
1124 // Clip segment length to remaining
1125 if (dstLen > remaining)
1126 dstLen = remaining;
1127
1128 copypv(srcAddr, (addr64_t) dstAddr64, dstLen,
1129 cppvPsnk | cppvFsnk | cppvNoRefSrc | cppvNoModSnk | cppvKmap);
1130
1131 srcAddr += dstLen;
1132 offset += dstLen;
1133 remaining -= dstLen;
1134 }
1135
1136 assert(!remaining);
1137
1138 return length - remaining;
1139 }
1140
1141 // osfmk/device/iokit_rpc.c
1142 extern "C" unsigned int IODefaultCacheBits(addr64_t pa);
1143
1144 /* DEPRECATED */ void IOGeneralMemoryDescriptor::setPosition(IOByteCount position)
1145 /* DEPRECATED */ {
1146 panic("IOGMD::setPosition deprecated");
1147 /* DEPRECATED */ }
1148
1149 IOReturn IOGeneralMemoryDescriptor::dmaCommandOperation(DMACommandOps op, void *vData, UInt dataSize) const
1150 {
1151 if (kIOMDGetCharacteristics == op) {
1152
1153 if (dataSize < sizeof(IOMDDMACharacteristics))
1154 return kIOReturnUnderrun;
1155
1156 IOMDDMACharacteristics *data = (IOMDDMACharacteristics *) vData;
1157 data->fLength = _length;
1158 data->fSGCount = _rangesCount;
1159 data->fPages = _pages;
1160 data->fDirection = _direction;
1161 if (!_wireCount)
1162 data->fIsPrepared = false;
1163 else {
1164 data->fIsPrepared = true;
1165 data->fHighestPage = _highestPage;
1166 if (_memoryEntries) {
1167 ioGMDData *gmdData = getDataP(_memoryEntries);
1168 ioPLBlock *ioplList = getIOPLList(gmdData);
1169 UInt count = getNumIOPL(_memoryEntries, gmdData);
1170
1171 data->fIsMapped = (gmdData->fMapper && _pages && (count > 0)
1172 && ioplList[0].fMappedBase);
1173 if (count == 1)
1174 data->fPageAlign = (ioplList[0].fPageOffset & PAGE_MASK) | ~PAGE_MASK;
1175 }
1176 else
1177 data->fIsMapped = false;
1178 }
1179
1180 return kIOReturnSuccess;
1181 }
1182 else if (!(kIOMDWalkSegments & op))
1183 return kIOReturnBadArgument;
1184
1185 // Get the next segment
1186 struct InternalState {
1187 IOMDDMAWalkSegmentArgs fIO;
1188 UInt fOffset2Index;
1189 UInt fIndex;
1190 UInt fNextOffset;
1191 } *isP;
1192
1193 // Find the next segment
1194 if (dataSize < sizeof(*isP))
1195 return kIOReturnUnderrun;
1196
1197 isP = (InternalState *) vData;
1198 UInt offset = isP->fIO.fOffset;
1199 bool mapped = isP->fIO.fMapped;
1200
1201 if (offset >= _length)
1202 return (offset == _length)? kIOReturnOverrun : kIOReturnInternalError;
1203
1204 // Validate the previous offset
1205 UInt ind, off2Ind = isP->fOffset2Index;
1206 if ((kIOMDFirstSegment != op)
1207 && offset
1208 && (offset == isP->fNextOffset || off2Ind <= offset))
1209 ind = isP->fIndex;
1210 else
1211 ind = off2Ind = 0; // Start from beginning
1212
1213 UInt length;
1214 UInt64 address;
1215 if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical) {
1216
1217 // Physical address based memory descriptor
1218 const IOPhysicalRange *physP = (IOPhysicalRange *) &_ranges.p[0];
1219
1220 // Find the range after the one that contains the offset
1221 UInt len;
1222 for (len = 0; off2Ind <= offset; ind++) {
1223 len = physP[ind].length;
1224 off2Ind += len;
1225 }
1226
1227 // Calculate length within range and starting address
1228 length = off2Ind - offset;
1229 address = physP[ind - 1].address + len - length;
1230
1231 // see how far we can coalesce ranges
1232 while (ind < _rangesCount && address + length == physP[ind].address) {
1233 len = physP[ind].length;
1234 length += len;
1235 off2Ind += len;
1236 ind++;
1237 }
1238
1239 // correct contiguous check overshoot
1240 ind--;
1241 off2Ind -= len;
1242 }
1243 else if ( (_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64) {
1244
1245 // Physical address based memory descriptor
1246 const IOAddressRange *physP = (IOAddressRange *) &_ranges.v64[0];
1247
1248 // Find the range after the one that contains the offset
1249 mach_vm_size_t len;
1250 for (len = 0; off2Ind <= offset; ind++) {
1251 len = physP[ind].length;
1252 off2Ind += len;
1253 }
1254
1255 // Calculate length within range and starting address
1256 length = off2Ind - offset;
1257 address = physP[ind - 1].address + len - length;
1258
1259 // see how far we can coalesce ranges
1260 while (ind < _rangesCount && address + length == physP[ind].address) {
1261 len = physP[ind].length;
1262 length += len;
1263 off2Ind += len;
1264 ind++;
1265 }
1266
1267 // correct contiguous check overshoot
1268 ind--;
1269 off2Ind -= len;
1270 }
1271 else do {
1272 if (!_wireCount)
1273 panic("IOGMD: not wired for the IODMACommand");
1274
1275 assert(_memoryEntries);
1276
1277 ioGMDData * dataP = getDataP(_memoryEntries);
1278 const ioPLBlock *ioplList = getIOPLList(dataP);
1279 UInt numIOPLs = getNumIOPL(_memoryEntries, dataP);
1280 upl_page_info_t *pageList = getPageList(dataP);
1281
1282 assert(numIOPLs > 0);
1283
1284 // Scan through iopl info blocks looking for block containing offset
1285 while (ind < numIOPLs && offset >= ioplList[ind].fIOMDOffset)
1286 ind++;
1287
1288 // Go back to actual range as search goes past it
1289 ioPLBlock ioplInfo = ioplList[ind - 1];
1290 off2Ind = ioplInfo.fIOMDOffset;
1291
1292 if (ind < numIOPLs)
1293 length = ioplList[ind].fIOMDOffset;
1294 else
1295 length = _length;
1296 length -= offset; // Remainder within iopl
1297
1298 // Subtract offset till this iopl in total list
1299 offset -= off2Ind;
1300
1301 // If a mapped address is requested and this is a pre-mapped IOPL
1302 // then just need to compute an offset relative to the mapped base.
1303 if (mapped && ioplInfo.fMappedBase) {
1304 offset += (ioplInfo.fPageOffset & PAGE_MASK);
1305 address = ptoa_64(ioplInfo.fMappedBase) + offset;
1306 continue; // Done leave do/while(false) now
1307 }
1308
1309 // The offset is rebased into the current iopl.
1310 // Now add the iopl 1st page offset.
1311 offset += ioplInfo.fPageOffset;
1312
1313 // For external UPLs the fPageInfo field points directly to
1314 // the upl's upl_page_info_t array.
1315 if (ioplInfo.fFlags & kIOPLExternUPL)
1316 pageList = (upl_page_info_t *) ioplInfo.fPageInfo;
1317 else
1318 pageList = &pageList[ioplInfo.fPageInfo];
1319
1320 // Check for direct device non-paged memory
1321 if ( ioplInfo.fFlags & kIOPLOnDevice ) {
1322 address = ptoa_64(pageList->phys_addr) + offset;
1323 continue; // Done leave do/while(false) now
1324 }
1325
1326 // Now we need compute the index into the pageList
1327 UInt pageInd = atop_32(offset);
1328 offset &= PAGE_MASK;
1329
1330 // Compute the starting address of this segment
1331 IOPhysicalAddress pageAddr = pageList[pageInd].phys_addr;
1332 address = ptoa_64(pageAddr) + offset;
1333
1334 // length is currently set to the length of the remainider of the iopl.
1335 // We need to check that the remainder of the iopl is contiguous.
1336 // This is indicated by pageList[ind].phys_addr being sequential.
1337 IOByteCount contigLength = PAGE_SIZE - offset;
1338 while (contigLength < length
1339 && ++pageAddr == pageList[++pageInd].phys_addr)
1340 {
1341 contigLength += PAGE_SIZE;
1342 }
1343
1344 if (contigLength < length)
1345 length = contigLength;
1346
1347
1348 assert(address);
1349 assert(length);
1350
1351 } while (false);
1352
1353 // Update return values and state
1354 isP->fIO.fIOVMAddr = address;
1355 isP->fIO.fLength = length;
1356 isP->fIndex = ind;
1357 isP->fOffset2Index = off2Ind;
1358 isP->fNextOffset = isP->fIO.fOffset + length;
1359
1360 return kIOReturnSuccess;
1361 }
1362
1363 addr64_t
1364 IOGeneralMemoryDescriptor::getPhysicalSegment64(IOByteCount offset, IOByteCount *lengthOfSegment)
1365 {
1366 IOReturn ret;
1367 IOByteCount length = 0;
1368 addr64_t address = 0;
1369
1370 if (offset < _length) // (within bounds?)
1371 {
1372 IOMDDMAWalkSegmentState _state;
1373 IOMDDMAWalkSegmentArgs * state = (IOMDDMAWalkSegmentArgs *) &_state;
1374
1375 state->fOffset = offset;
1376 state->fLength = _length - offset;
1377 state->fMapped = false;
1378
1379 ret = dmaCommandOperation(kIOMDFirstSegment, _state, sizeof(_state));
1380
1381 if ((kIOReturnSuccess != ret) && (kIOReturnOverrun != ret))
1382 DEBG("getPhysicalSegment64 dmaCommandOperation(%lx), %p, offset %qx, addr %qx, len %qx\n",
1383 ret, this, state->fOffset,
1384 state->fIOVMAddr, state->fLength);
1385 if (kIOReturnSuccess == ret)
1386 {
1387 address = state->fIOVMAddr;
1388 length = state->fLength;
1389 }
1390 if (!address)
1391 length = 0;
1392 }
1393
1394 if (lengthOfSegment)
1395 *lengthOfSegment = length;
1396
1397 return (address);
1398 }
1399
1400 IOPhysicalAddress
1401 IOGeneralMemoryDescriptor::getPhysicalSegment(IOByteCount offset, IOByteCount *lengthOfSegment)
1402 {
1403 IOReturn ret;
1404 IOByteCount length = 0;
1405 addr64_t address = 0;
1406
1407 // assert(offset <= _length);
1408
1409 if (offset < _length) // (within bounds?)
1410 {
1411 IOMDDMAWalkSegmentState _state;
1412 IOMDDMAWalkSegmentArgs * state = (IOMDDMAWalkSegmentArgs *) &_state;
1413
1414 state->fOffset = offset;
1415 state->fLength = _length - offset;
1416 state->fMapped = true;
1417
1418 ret = dmaCommandOperation(
1419 kIOMDFirstSegment, _state, sizeof(_state));
1420
1421 if ((kIOReturnSuccess != ret) && (kIOReturnOverrun != ret))
1422 DEBG("getPhysicalSegment dmaCommandOperation(%lx), %p, offset %qx, addr %qx, len %qx\n",
1423 ret, this, state->fOffset,
1424 state->fIOVMAddr, state->fLength);
1425 if (kIOReturnSuccess == ret)
1426 {
1427 address = state->fIOVMAddr;
1428 length = state->fLength;
1429 }
1430
1431 if (!address)
1432 length = 0;
1433 }
1434
1435 if ((address + length) > 0x100000000ULL)
1436 {
1437 panic("getPhysicalSegment() out of 32b range 0x%qx, len 0x%x, class %s",
1438 address, length, (getMetaClass())->getClassName());
1439 }
1440
1441 if (lengthOfSegment)
1442 *lengthOfSegment = length;
1443
1444 return ((IOPhysicalAddress) address);
1445 }
1446
1447 addr64_t
1448 IOMemoryDescriptor::getPhysicalSegment64(IOByteCount offset, IOByteCount *lengthOfSegment)
1449 {
1450 IOPhysicalAddress phys32;
1451 IOByteCount length;
1452 addr64_t phys64;
1453 IOMapper * mapper = 0;
1454
1455 phys32 = getPhysicalSegment(offset, lengthOfSegment);
1456 if (!phys32)
1457 return 0;
1458
1459 if (gIOSystemMapper)
1460 mapper = gIOSystemMapper;
1461
1462 if (mapper)
1463 {
1464 IOByteCount origLen;
1465
1466 phys64 = mapper->mapAddr(phys32);
1467 origLen = *lengthOfSegment;
1468 length = page_size - (phys64 & (page_size - 1));
1469 while ((length < origLen)
1470 && ((phys64 + length) == mapper->mapAddr(phys32 + length)))
1471 length += page_size;
1472 if (length > origLen)
1473 length = origLen;
1474
1475 *lengthOfSegment = length;
1476 }
1477 else
1478 phys64 = (addr64_t) phys32;
1479
1480 return phys64;
1481 }
1482
1483 IOPhysicalAddress
1484 IOGeneralMemoryDescriptor::getSourceSegment(IOByteCount offset, IOByteCount *lengthOfSegment)
1485 {
1486 IOPhysicalAddress address = 0;
1487 IOPhysicalLength length = 0;
1488 IOOptionBits type = _flags & kIOMemoryTypeMask;
1489
1490 assert(offset <= _length);
1491
1492 if ( type == kIOMemoryTypeUPL)
1493 return super::getSourceSegment( offset, lengthOfSegment );
1494 else if ( offset < _length ) // (within bounds?)
1495 {
1496 unsigned rangesIndex = 0;
1497 Ranges vec = _ranges;
1498 user_addr_t addr;
1499
1500 // Find starting address within the vector of ranges
1501 for (;;) {
1502 getAddrLenForInd(addr, length, type, vec, rangesIndex);
1503 if (offset < length)
1504 break;
1505 offset -= length; // (make offset relative)
1506 rangesIndex++;
1507 }
1508
1509 // Now that we have the starting range,
1510 // lets find the last contiguous range
1511 addr += offset;
1512 length -= offset;
1513
1514 for ( ++rangesIndex; rangesIndex < _rangesCount; rangesIndex++ ) {
1515 user_addr_t newAddr;
1516 IOPhysicalLength newLen;
1517
1518 getAddrLenForInd(newAddr, newLen, type, vec, rangesIndex);
1519 if (addr + length != newAddr)
1520 break;
1521 length += newLen;
1522 }
1523 if (addr)
1524 address = (IOPhysicalAddress) addr; // Truncate address to 32bit
1525 else
1526 length = 0;
1527 }
1528
1529 if ( lengthOfSegment ) *lengthOfSegment = length;
1530
1531 return address;
1532 }
1533
1534 /* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
1535 /* DEPRECATED */ void * IOGeneralMemoryDescriptor::getVirtualSegment(IOByteCount offset,
1536 /* DEPRECATED */ IOByteCount * lengthOfSegment)
1537 /* DEPRECATED */ {
1538 if (_task == kernel_task)
1539 return (void *) getSourceSegment(offset, lengthOfSegment);
1540 else
1541 panic("IOGMD::getVirtualSegment deprecated");
1542
1543 return 0;
1544 /* DEPRECATED */ }
1545 /* DEPRECATED */ /* USE INSTEAD: map(), readBytes(), writeBytes() */
1546
1547
1548
1549 IOReturn
1550 IOMemoryDescriptor::dmaCommandOperation(DMACommandOps op, void *vData, UInt dataSize) const
1551 {
1552 if (kIOMDGetCharacteristics == op) {
1553 if (dataSize < sizeof(IOMDDMACharacteristics))
1554 return kIOReturnUnderrun;
1555
1556 IOMDDMACharacteristics *data = (IOMDDMACharacteristics *) vData;
1557 data->fLength = getLength();
1558 data->fSGCount = 0;
1559 data->fDirection = _direction;
1560 if (IOMapper::gSystem)
1561 data->fIsMapped = true;
1562 data->fIsPrepared = true; // Assume prepared - fails safe
1563 }
1564 else if (kIOMDWalkSegments & op) {
1565 if (dataSize < sizeof(IOMDDMAWalkSegmentArgs))
1566 return kIOReturnUnderrun;
1567
1568 IOMDDMAWalkSegmentArgs *data = (IOMDDMAWalkSegmentArgs *) vData;
1569 IOByteCount offset = (IOByteCount) data->fOffset;
1570
1571 IOPhysicalLength length;
1572 IOMemoryDescriptor *ncmd = const_cast<IOMemoryDescriptor *>(this);
1573 if (data->fMapped && IOMapper::gSystem)
1574 data->fIOVMAddr = ncmd->getPhysicalSegment(offset, &length);
1575 else
1576 data->fIOVMAddr = ncmd->getPhysicalSegment64(offset, &length);
1577 data->fLength = length;
1578 }
1579 else
1580 return kIOReturnBadArgument;
1581
1582 return kIOReturnSuccess;
1583 }
1584
1585 IOReturn IOMemoryDescriptor::setPurgeable( IOOptionBits newState,
1586 IOOptionBits * oldState )
1587 {
1588 IOReturn err = kIOReturnSuccess;
1589 vm_purgable_t control;
1590 int state;
1591
1592 do
1593 {
1594 if (!_memEntry)
1595 {
1596 err = kIOReturnNotReady;
1597 break;
1598 }
1599
1600 control = VM_PURGABLE_SET_STATE;
1601 switch (newState)
1602 {
1603 case kIOMemoryPurgeableKeepCurrent:
1604 control = VM_PURGABLE_GET_STATE;
1605 break;
1606
1607 case kIOMemoryPurgeableNonVolatile:
1608 state = VM_PURGABLE_NONVOLATILE;
1609 break;
1610 case kIOMemoryPurgeableVolatile:
1611 state = VM_PURGABLE_VOLATILE;
1612 break;
1613 case kIOMemoryPurgeableEmpty:
1614 state = VM_PURGABLE_EMPTY;
1615 break;
1616 default:
1617 err = kIOReturnBadArgument;
1618 break;
1619 }
1620
1621 if (kIOReturnSuccess != err)
1622 break;
1623
1624 err = mach_memory_entry_purgable_control((ipc_port_t) _memEntry, control, &state);
1625
1626 if (oldState)
1627 {
1628 if (kIOReturnSuccess == err)
1629 {
1630 switch (state)
1631 {
1632 case VM_PURGABLE_NONVOLATILE:
1633 state = kIOMemoryPurgeableNonVolatile;
1634 break;
1635 case VM_PURGABLE_VOLATILE:
1636 state = kIOMemoryPurgeableVolatile;
1637 break;
1638 case VM_PURGABLE_EMPTY:
1639 state = kIOMemoryPurgeableEmpty;
1640 break;
1641 default:
1642 state = kIOMemoryPurgeableNonVolatile;
1643 err = kIOReturnNotReady;
1644 break;
1645 }
1646 *oldState = state;
1647 }
1648 }
1649 }
1650 while (false);
1651
1652 return (err);
1653 }
1654
1655 extern "C" void dcache_incoherent_io_flush64(addr64_t pa, unsigned int count);
1656 extern "C" void dcache_incoherent_io_store64(addr64_t pa, unsigned int count);
1657
1658 IOReturn IOMemoryDescriptor::performOperation( IOOptionBits options,
1659 IOByteCount offset, IOByteCount length )
1660 {
1661 IOByteCount remaining;
1662 void (*func)(addr64_t pa, unsigned int count) = 0;
1663
1664 switch (options)
1665 {
1666 case kIOMemoryIncoherentIOFlush:
1667 func = &dcache_incoherent_io_flush64;
1668 break;
1669 case kIOMemoryIncoherentIOStore:
1670 func = &dcache_incoherent_io_store64;
1671 break;
1672 }
1673
1674 if (!func)
1675 return (kIOReturnUnsupported);
1676
1677 remaining = length = min(length, getLength() - offset);
1678 while (remaining)
1679 // (process another target segment?)
1680 {
1681 addr64_t dstAddr64;
1682 IOByteCount dstLen;
1683
1684 dstAddr64 = getPhysicalSegment64(offset, &dstLen);
1685 if (!dstAddr64)
1686 break;
1687
1688 // Clip segment length to remaining
1689 if (dstLen > remaining)
1690 dstLen = remaining;
1691
1692 (*func)(dstAddr64, dstLen);
1693
1694 offset += dstLen;
1695 remaining -= dstLen;
1696 }
1697
1698 return (remaining ? kIOReturnUnderrun : kIOReturnSuccess);
1699 }
1700
1701 #ifdef __ppc__
1702 extern vm_offset_t static_memory_end;
1703 #define io_kernel_static_end static_memory_end
1704 #else
1705 extern vm_offset_t first_avail;
1706 #define io_kernel_static_end first_avail
1707 #endif
1708
1709 static kern_return_t
1710 io_get_kernel_static_upl(
1711 vm_map_t /* map */,
1712 vm_address_t offset,
1713 vm_size_t *upl_size,
1714 upl_t *upl,
1715 upl_page_info_array_t page_list,
1716 unsigned int *count,
1717 ppnum_t *highest_page)
1718 {
1719 unsigned int pageCount, page;
1720 ppnum_t phys;
1721 ppnum_t highestPage = 0;
1722
1723 pageCount = atop_32(*upl_size);
1724 if (pageCount > *count)
1725 pageCount = *count;
1726
1727 *upl = NULL;
1728
1729 for (page = 0; page < pageCount; page++)
1730 {
1731 phys = pmap_find_phys(kernel_pmap, ((addr64_t)offset) + ptoa_64(page));
1732 if (!phys)
1733 break;
1734 page_list[page].phys_addr = phys;
1735 page_list[page].pageout = 0;
1736 page_list[page].absent = 0;
1737 page_list[page].dirty = 0;
1738 page_list[page].precious = 0;
1739 page_list[page].device = 0;
1740 if (phys > highestPage)
1741 highestPage = page;
1742 }
1743
1744 *highest_page = highestPage;
1745
1746 return ((page >= pageCount) ? kIOReturnSuccess : kIOReturnVMError);
1747 }
1748
1749 IOReturn IOGeneralMemoryDescriptor::wireVirtual(IODirection forDirection)
1750 {
1751 IOOptionBits type = _flags & kIOMemoryTypeMask;
1752 IOReturn error = kIOReturnNoMemory;
1753 ioGMDData *dataP;
1754 ppnum_t mapBase = 0;
1755 IOMapper *mapper;
1756 ipc_port_t sharedMem = (ipc_port_t) _memEntry;
1757
1758 assert(!_wireCount);
1759 assert(kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type);
1760
1761 if (_pages >= gIOMaximumMappedIOPageCount)
1762 return kIOReturnNoResources;
1763
1764 dataP = getDataP(_memoryEntries);
1765 mapper = dataP->fMapper;
1766 if (mapper && _pages)
1767 mapBase = mapper->iovmAlloc(_pages);
1768
1769 // Note that appendBytes(NULL) zeros the data up to the
1770 // desired length.
1771 _memoryEntries->appendBytes(0, dataP->fPageCnt * sizeof(upl_page_info_t));
1772 dataP = 0; // May no longer be valid so lets not get tempted.
1773
1774 if (forDirection == kIODirectionNone)
1775 forDirection = _direction;
1776
1777 int uplFlags; // This Mem Desc's default flags for upl creation
1778 switch (kIODirectionOutIn & forDirection)
1779 {
1780 case kIODirectionOut:
1781 // Pages do not need to be marked as dirty on commit
1782 uplFlags = UPL_COPYOUT_FROM;
1783 _flags |= kIOMemoryPreparedReadOnly;
1784 break;
1785
1786 case kIODirectionIn:
1787 default:
1788 uplFlags = 0; // i.e. ~UPL_COPYOUT_FROM
1789 break;
1790 }
1791 uplFlags |= UPL_SET_IO_WIRE | UPL_SET_LITE;
1792
1793 #ifdef UPL_NEED_32BIT_ADDR
1794 if (kIODirectionPrepareToPhys32 & forDirection)
1795 uplFlags |= UPL_NEED_32BIT_ADDR;
1796 #endif
1797
1798 // Find the appropriate vm_map for the given task
1799 vm_map_t curMap;
1800 if (_task == kernel_task && (kIOMemoryBufferPageable & _flags))
1801 curMap = 0;
1802 else
1803 { curMap = get_task_map(_task); }
1804
1805 // Iterate over the vector of virtual ranges
1806 Ranges vec = _ranges;
1807 unsigned int pageIndex = 0;
1808 IOByteCount mdOffset = 0;
1809 ppnum_t highestPage = 0;
1810 for (UInt range = 0; range < _rangesCount; range++) {
1811 ioPLBlock iopl;
1812 user_addr_t startPage;
1813 IOByteCount numBytes;
1814 ppnum_t highPage = 0;
1815
1816 // Get the startPage address and length of vec[range]
1817 getAddrLenForInd(startPage, numBytes, type, vec, range);
1818 iopl.fPageOffset = (short) startPage & PAGE_MASK;
1819 numBytes += iopl.fPageOffset;
1820 startPage = trunc_page_64(startPage);
1821
1822 if (mapper)
1823 iopl.fMappedBase = mapBase + pageIndex;
1824 else
1825 iopl.fMappedBase = 0;
1826
1827 // Iterate over the current range, creating UPLs
1828 while (numBytes) {
1829 dataP = getDataP(_memoryEntries);
1830 vm_address_t kernelStart = (vm_address_t) startPage;
1831 vm_map_t theMap;
1832 if (curMap)
1833 theMap = curMap;
1834 else if (!sharedMem) {
1835 assert(_task == kernel_task);
1836 theMap = IOPageableMapForAddress(kernelStart);
1837 }
1838 else
1839 theMap = NULL;
1840
1841 upl_page_info_array_t pageInfo = getPageList(dataP);
1842 int ioplFlags = uplFlags;
1843 upl_page_list_ptr_t baseInfo = &pageInfo[pageIndex];
1844
1845 vm_size_t ioplSize = round_page_32(numBytes);
1846 unsigned int numPageInfo = atop_32(ioplSize);
1847
1848 if (theMap == kernel_map && kernelStart < io_kernel_static_end) {
1849 error = io_get_kernel_static_upl(theMap,
1850 kernelStart,
1851 &ioplSize,
1852 &iopl.fIOPL,
1853 baseInfo,
1854 &numPageInfo,
1855 &highPage);
1856 }
1857 else if (sharedMem) {
1858 error = memory_object_iopl_request(sharedMem,
1859 ptoa_32(pageIndex),
1860 &ioplSize,
1861 &iopl.fIOPL,
1862 baseInfo,
1863 &numPageInfo,
1864 &ioplFlags);
1865 }
1866 else {
1867 assert(theMap);
1868 error = vm_map_create_upl(theMap,
1869 startPage,
1870 &ioplSize,
1871 &iopl.fIOPL,
1872 baseInfo,
1873 &numPageInfo,
1874 &ioplFlags);
1875 }
1876
1877 assert(ioplSize);
1878 if (error != KERN_SUCCESS)
1879 goto abortExit;
1880
1881 if (iopl.fIOPL)
1882 highPage = upl_get_highest_page(iopl.fIOPL);
1883 if (highPage > highestPage)
1884 highestPage = highPage;
1885
1886 error = kIOReturnNoMemory;
1887
1888 if (baseInfo->device) {
1889 numPageInfo = 1;
1890 iopl.fFlags = kIOPLOnDevice;
1891 // Don't translate device memory at all
1892 if (mapper && mapBase) {
1893 mapper->iovmFree(mapBase, _pages);
1894 mapBase = 0;
1895 iopl.fMappedBase = 0;
1896 }
1897 }
1898 else {
1899 iopl.fFlags = 0;
1900 if (mapper)
1901 mapper->iovmInsert(mapBase, pageIndex,
1902 baseInfo, numPageInfo);
1903 }
1904
1905 iopl.fIOMDOffset = mdOffset;
1906 iopl.fPageInfo = pageIndex;
1907
1908 if ((_flags & kIOMemoryAutoPrepare) && iopl.fIOPL)
1909 {
1910 upl_commit(iopl.fIOPL, 0, 0);
1911 upl_deallocate(iopl.fIOPL);
1912 iopl.fIOPL = 0;
1913 }
1914
1915 if (!_memoryEntries->appendBytes(&iopl, sizeof(iopl))) {
1916 // Clean up partial created and unsaved iopl
1917 if (iopl.fIOPL) {
1918 upl_abort(iopl.fIOPL, 0);
1919 upl_deallocate(iopl.fIOPL);
1920 }
1921 goto abortExit;
1922 }
1923
1924 // Check for a multiple iopl's in one virtual range
1925 pageIndex += numPageInfo;
1926 mdOffset -= iopl.fPageOffset;
1927 if (ioplSize < numBytes) {
1928 numBytes -= ioplSize;
1929 startPage += ioplSize;
1930 mdOffset += ioplSize;
1931 iopl.fPageOffset = 0;
1932 if (mapper)
1933 iopl.fMappedBase = mapBase + pageIndex;
1934 }
1935 else {
1936 mdOffset += numBytes;
1937 break;
1938 }
1939 }
1940 }
1941
1942 _highestPage = highestPage;
1943
1944 return kIOReturnSuccess;
1945
1946 abortExit:
1947 {
1948 dataP = getDataP(_memoryEntries);
1949 UInt done = getNumIOPL(_memoryEntries, dataP);
1950 ioPLBlock *ioplList = getIOPLList(dataP);
1951
1952 for (UInt range = 0; range < done; range++)
1953 {
1954 if (ioplList[range].fIOPL) {
1955 upl_abort(ioplList[range].fIOPL, 0);
1956 upl_deallocate(ioplList[range].fIOPL);
1957 }
1958 }
1959 (void) _memoryEntries->initWithBytes(dataP, sizeof(ioGMDData)); // == setLength()
1960
1961 if (mapper && mapBase)
1962 mapper->iovmFree(mapBase, _pages);
1963 }
1964
1965 return error;
1966 }
1967
1968 /*
1969 * prepare
1970 *
1971 * Prepare the memory for an I/O transfer. This involves paging in
1972 * the memory, if necessary, and wiring it down for the duration of
1973 * the transfer. The complete() method completes the processing of
1974 * the memory after the I/O transfer finishes. This method needn't
1975 * called for non-pageable memory.
1976 */
1977 IOReturn IOGeneralMemoryDescriptor::prepare(IODirection forDirection)
1978 {
1979 IOReturn error = kIOReturnSuccess;
1980 IOOptionBits type = _flags & kIOMemoryTypeMask;
1981
1982 if (!_wireCount
1983 && (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type) ) {
1984 error = wireVirtual(forDirection);
1985 if (error)
1986 return error;
1987 }
1988
1989 _wireCount++;
1990
1991 return kIOReturnSuccess;
1992 }
1993
1994 /*
1995 * complete
1996 *
1997 * Complete processing of the memory after an I/O transfer finishes.
1998 * This method should not be called unless a prepare was previously
1999 * issued; the prepare() and complete() must occur in pairs, before
2000 * before and after an I/O transfer involving pageable memory.
2001 */
2002
2003 IOReturn IOGeneralMemoryDescriptor::complete(IODirection /* forDirection */)
2004 {
2005 assert(_wireCount);
2006
2007 if (!_wireCount)
2008 return kIOReturnSuccess;
2009
2010 _wireCount--;
2011 if (!_wireCount) {
2012 IOOptionBits type = _flags & kIOMemoryTypeMask;
2013
2014 if ((kIOMemoryTypePhysical == type) || (kIOMemoryTypePhysical64 == type)) {
2015 /* kIOMemoryTypePhysical */
2016 // DO NOTHING
2017 }
2018 else {
2019 ioGMDData * dataP = getDataP(_memoryEntries);
2020 ioPLBlock *ioplList = getIOPLList(dataP);
2021 UInt count = getNumIOPL(_memoryEntries, dataP);
2022
2023 if (dataP->fMapper && _pages && ioplList[0].fMappedBase)
2024 dataP->fMapper->iovmFree(ioplList[0].fMappedBase, _pages);
2025
2026 // Only complete iopls that we created which are for TypeVirtual
2027 if (kIOMemoryTypeVirtual == type || kIOMemoryTypeVirtual64 == type || kIOMemoryTypeUIO == type) {
2028 for (UInt ind = 0; ind < count; ind++)
2029 if (ioplList[ind].fIOPL) {
2030 upl_commit(ioplList[ind].fIOPL, 0, 0);
2031 upl_deallocate(ioplList[ind].fIOPL);
2032 }
2033 }
2034
2035 (void) _memoryEntries->initWithBytes(dataP, sizeof(ioGMDData)); // == setLength()
2036 }
2037 }
2038 return kIOReturnSuccess;
2039 }
2040
2041 IOReturn IOGeneralMemoryDescriptor::doMap(
2042 vm_map_t addressMap,
2043 IOVirtualAddress * atAddress,
2044 IOOptionBits options,
2045 IOByteCount sourceOffset,
2046 IOByteCount length )
2047 {
2048 kern_return_t kr;
2049 ipc_port_t sharedMem = (ipc_port_t) _memEntry;
2050
2051 IOOptionBits type = _flags & kIOMemoryTypeMask;
2052 Ranges vec = _ranges;
2053
2054 user_addr_t range0Addr = 0;
2055 IOByteCount range0Len = 0;
2056
2057 if (vec.v)
2058 getAddrLenForInd(range0Addr, range0Len, type, vec, 0);
2059
2060 // mapping source == dest? (could be much better)
2061 if( _task
2062 && (addressMap == get_task_map(_task)) && (options & kIOMapAnywhere)
2063 && (1 == _rangesCount) && (0 == sourceOffset)
2064 && range0Addr && (length <= range0Len) ) {
2065 if (sizeof(user_addr_t) > 4 && ((UInt64) range0Addr) >> 32)
2066 return kIOReturnOverrun; // Doesn't fit in 32bit return field
2067 else {
2068 *atAddress = range0Addr;
2069 return( kIOReturnSuccess );
2070 }
2071 }
2072
2073 if( 0 == sharedMem) {
2074
2075 vm_size_t size = ptoa_32(_pages);
2076
2077 if( _task) {
2078
2079 memory_object_size_t actualSize = size;
2080 kr = mach_make_memory_entry_64(get_task_map(_task),
2081 &actualSize, range0Addr,
2082 VM_PROT_READ | VM_PROT_WRITE, &sharedMem,
2083 NULL );
2084
2085 if( (KERN_SUCCESS == kr) && (actualSize != round_page_32(size))) {
2086 #if IOASSERT
2087 IOLog("mach_make_memory_entry_64 (%08llx) size (%08lx:%08x)\n",
2088 range0Addr, (UInt32) actualSize, size);
2089 #endif
2090 kr = kIOReturnVMError;
2091 ipc_port_release_send( sharedMem );
2092 }
2093
2094 if( KERN_SUCCESS != kr)
2095 sharedMem = MACH_PORT_NULL;
2096
2097 } else do { // _task == 0, must be physical
2098
2099 memory_object_t pager;
2100 unsigned int flags = 0;
2101 addr64_t pa;
2102 IOPhysicalLength segLen;
2103
2104 pa = getPhysicalSegment64( sourceOffset, &segLen );
2105
2106 if( !reserved) {
2107 reserved = IONew( ExpansionData, 1 );
2108 if( !reserved)
2109 continue;
2110 }
2111 reserved->pagerContig = (1 == _rangesCount);
2112 reserved->memory = this;
2113
2114 /*What cache mode do we need*/
2115 switch(options & kIOMapCacheMask ) {
2116
2117 case kIOMapDefaultCache:
2118 default:
2119 flags = IODefaultCacheBits(pa);
2120 break;
2121
2122 case kIOMapInhibitCache:
2123 flags = DEVICE_PAGER_CACHE_INHIB |
2124 DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
2125 break;
2126
2127 case kIOMapWriteThruCache:
2128 flags = DEVICE_PAGER_WRITE_THROUGH |
2129 DEVICE_PAGER_COHERENT | DEVICE_PAGER_GUARDED;
2130 break;
2131
2132 case kIOMapCopybackCache:
2133 flags = DEVICE_PAGER_COHERENT;
2134 break;
2135
2136 case kIOMapWriteCombineCache:
2137 flags = DEVICE_PAGER_CACHE_INHIB |
2138 DEVICE_PAGER_COHERENT;
2139 break;
2140 }
2141
2142 flags |= reserved->pagerContig ? DEVICE_PAGER_CONTIGUOUS : 0;
2143
2144 pager = device_pager_setup( (memory_object_t) 0, (int) reserved,
2145 size, flags);
2146 assert( pager );
2147
2148 if( pager) {
2149 kr = mach_memory_object_memory_entry_64( (host_t) 1, false /*internal*/,
2150 size, VM_PROT_READ | VM_PROT_WRITE, pager, &sharedMem );
2151
2152 assert( KERN_SUCCESS == kr );
2153 if( KERN_SUCCESS != kr) {
2154 device_pager_deallocate( pager );
2155 pager = MACH_PORT_NULL;
2156 sharedMem = MACH_PORT_NULL;
2157 }
2158 }
2159 if( pager && sharedMem)
2160 reserved->devicePager = pager;
2161 else {
2162 IODelete( reserved, ExpansionData, 1 );
2163 reserved = 0;
2164 }
2165
2166 } while( false );
2167
2168 _memEntry = (void *) sharedMem;
2169 }
2170
2171
2172 if( 0 == sharedMem)
2173 kr = kIOReturnVMError;
2174 else
2175 kr = super::doMap( addressMap, atAddress,
2176 options, sourceOffset, length );
2177
2178 return( kr );
2179 }
2180
2181 IOReturn IOGeneralMemoryDescriptor::doUnmap(
2182 vm_map_t addressMap,
2183 IOVirtualAddress logical,
2184 IOByteCount length )
2185 {
2186 // could be much better
2187 if( _task && (addressMap == get_task_map(_task)) && (1 == _rangesCount)) {
2188
2189 IOOptionBits type = _flags & kIOMemoryTypeMask;
2190 user_addr_t range0Addr;
2191 IOByteCount range0Len;
2192
2193 getAddrLenForInd(range0Addr, range0Len, type, _ranges, 0);
2194 if (logical == range0Addr && length <= range0Len)
2195 return( kIOReturnSuccess );
2196 }
2197
2198 return( super::doUnmap( addressMap, logical, length ));
2199 }
2200
2201 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2202
2203 OSDefineMetaClassAndAbstractStructors( IOMemoryMap, OSObject )
2204
2205 /* inline function implementation */
2206 IOPhysicalAddress IOMemoryMap::getPhysicalAddress()
2207 { return( getPhysicalSegment( 0, 0 )); }
2208
2209
2210 #undef super
2211 #define super IOMemoryMap
2212
2213 OSDefineMetaClassAndStructors(_IOMemoryMap, IOMemoryMap)
2214
2215 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2216
2217 bool _IOMemoryMap::initCompatible(
2218 IOMemoryDescriptor * _memory,
2219 IOMemoryMap * _superMap,
2220 IOByteCount _offset,
2221 IOByteCount _length )
2222 {
2223
2224 if( !super::init())
2225 return( false);
2226
2227 if( (_offset + _length) > _superMap->getLength())
2228 return( false);
2229
2230 _memory->retain();
2231 memory = _memory;
2232 _superMap->retain();
2233 superMap = _superMap;
2234
2235 offset = _offset;
2236 if( _length)
2237 length = _length;
2238 else
2239 length = _memory->getLength();
2240
2241 options = superMap->getMapOptions();
2242 logical = superMap->getVirtualAddress() + offset;
2243
2244 return( true );
2245 }
2246
2247 bool _IOMemoryMap::initWithDescriptor(
2248 IOMemoryDescriptor * _memory,
2249 task_t intoTask,
2250 IOVirtualAddress toAddress,
2251 IOOptionBits _options,
2252 IOByteCount _offset,
2253 IOByteCount _length )
2254 {
2255 bool ok;
2256 bool redir = ((kIOMapUnique|kIOMapReference) == ((kIOMapUnique|kIOMapReference) & _options));
2257
2258 if ((!_memory) || (!intoTask))
2259 return( false);
2260
2261 if( (_offset + _length) > _memory->getLength())
2262 return( false);
2263
2264 if (!redir)
2265 {
2266 if (!super::init())
2267 return(false);
2268 addressMap = get_task_map(intoTask);
2269 if( !addressMap)
2270 return( false);
2271 vm_map_reference(addressMap);
2272 addressTask = intoTask;
2273 logical = toAddress;
2274 options = _options;
2275 }
2276
2277 _memory->retain();
2278
2279 offset = _offset;
2280 if( _length)
2281 length = _length;
2282 else
2283 length = _memory->getLength();
2284
2285 if( options & kIOMapStatic)
2286 ok = true;
2287 else
2288 ok = (kIOReturnSuccess == _memory->doMap( addressMap, &toAddress,
2289 _options, offset, length ));
2290 if (ok || redir)
2291 {
2292 if (memory)
2293 memory->release();
2294 memory = _memory;
2295 logical = toAddress;
2296 }
2297 else
2298 {
2299 _memory->release();
2300 if (!redir)
2301 {
2302 logical = 0;
2303 memory = 0;
2304 vm_map_deallocate(addressMap);
2305 addressMap = 0;
2306 }
2307 }
2308
2309 return( ok );
2310 }
2311
2312 /* LP64todo - these need to expand */
2313 struct IOMemoryDescriptorMapAllocRef
2314 {
2315 ipc_port_t sharedMem;
2316 vm_size_t size;
2317 vm_offset_t mapped;
2318 IOByteCount sourceOffset;
2319 IOOptionBits options;
2320 };
2321
2322 static kern_return_t IOMemoryDescriptorMapAlloc(vm_map_t map, void * _ref)
2323 {
2324 IOMemoryDescriptorMapAllocRef * ref = (IOMemoryDescriptorMapAllocRef *)_ref;
2325 IOReturn err;
2326
2327 do {
2328 if( ref->sharedMem) {
2329 vm_prot_t prot = VM_PROT_READ
2330 | ((ref->options & kIOMapReadOnly) ? 0 : VM_PROT_WRITE);
2331
2332 // set memory entry cache
2333 vm_prot_t memEntryCacheMode = prot | MAP_MEM_ONLY;
2334 switch (ref->options & kIOMapCacheMask)
2335 {
2336 case kIOMapInhibitCache:
2337 SET_MAP_MEM(MAP_MEM_IO, memEntryCacheMode);
2338 break;
2339
2340 case kIOMapWriteThruCache:
2341 SET_MAP_MEM(MAP_MEM_WTHRU, memEntryCacheMode);
2342 break;
2343
2344 case kIOMapWriteCombineCache:
2345 SET_MAP_MEM(MAP_MEM_WCOMB, memEntryCacheMode);
2346 break;
2347
2348 case kIOMapCopybackCache:
2349 SET_MAP_MEM(MAP_MEM_COPYBACK, memEntryCacheMode);
2350 break;
2351
2352 case kIOMapDefaultCache:
2353 default:
2354 SET_MAP_MEM(MAP_MEM_NOOP, memEntryCacheMode);
2355 break;
2356 }
2357
2358 vm_size_t unused = 0;
2359
2360 err = mach_make_memory_entry( NULL /*unused*/, &unused, 0 /*unused*/,
2361 memEntryCacheMode, NULL, ref->sharedMem );
2362 if (KERN_SUCCESS != err)
2363 IOLog("MAP_MEM_ONLY failed %d\n", err);
2364
2365 err = vm_map( map,
2366 &ref->mapped,
2367 ref->size, 0 /* mask */,
2368 (( ref->options & kIOMapAnywhere ) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
2369 | VM_MAKE_TAG(VM_MEMORY_IOKIT),
2370 ref->sharedMem, ref->sourceOffset,
2371 false, // copy
2372 prot, // cur
2373 prot, // max
2374 VM_INHERIT_NONE);
2375
2376 if( KERN_SUCCESS != err) {
2377 ref->mapped = 0;
2378 continue;
2379 }
2380
2381 } else {
2382
2383 err = vm_allocate( map, &ref->mapped, ref->size,
2384 ((ref->options & kIOMapAnywhere) ? VM_FLAGS_ANYWHERE : VM_FLAGS_FIXED)
2385 | VM_MAKE_TAG(VM_MEMORY_IOKIT) );
2386
2387 if( KERN_SUCCESS != err) {
2388 ref->mapped = 0;
2389 continue;
2390 }
2391
2392 // we have to make sure that these guys don't get copied if we fork.
2393 err = vm_inherit( map, ref->mapped, ref->size, VM_INHERIT_NONE);
2394 assert( KERN_SUCCESS == err );
2395 }
2396
2397 } while( false );
2398
2399 return( err );
2400 }
2401
2402
2403 IOReturn IOMemoryDescriptor::doMap(
2404 vm_map_t addressMap,
2405 IOVirtualAddress * atAddress,
2406 IOOptionBits options,
2407 IOByteCount sourceOffset,
2408 IOByteCount length )
2409 {
2410 IOReturn err = kIOReturnSuccess;
2411 memory_object_t pager;
2412 vm_address_t logical;
2413 IOByteCount pageOffset;
2414 IOPhysicalAddress sourceAddr;
2415 IOMemoryDescriptorMapAllocRef ref;
2416
2417 ref.sharedMem = (ipc_port_t) _memEntry;
2418 ref.sourceOffset = sourceOffset;
2419 ref.options = options;
2420
2421 do {
2422
2423 if( 0 == length)
2424 length = getLength();
2425
2426 sourceAddr = getSourceSegment( sourceOffset, NULL );
2427 pageOffset = sourceAddr - trunc_page_32( sourceAddr );
2428
2429 ref.size = round_page_32( length + pageOffset );
2430
2431 if ((kIOMapReference|kIOMapUnique) == ((kIOMapReference|kIOMapUnique) & options))
2432 {
2433 upl_t redirUPL2;
2434 vm_size_t size;
2435 int flags;
2436
2437 _IOMemoryMap * mapping = (_IOMemoryMap *) *atAddress;
2438 ref.mapped = mapping->getVirtualAddress();
2439
2440 if (!_memEntry)
2441 {
2442 err = kIOReturnNotReadable;
2443 continue;
2444 }
2445
2446 size = length;
2447 flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
2448 | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS;
2449
2450 if (KERN_SUCCESS != memory_object_iopl_request((ipc_port_t) _memEntry, 0, &size, &redirUPL2,
2451 NULL, NULL,
2452 &flags))
2453 redirUPL2 = NULL;
2454
2455 err = upl_transpose(redirUPL2, mapping->redirUPL);
2456 if (kIOReturnSuccess != err)
2457 {
2458 IOLog("upl_transpose(%x)\n", err);
2459 err = kIOReturnSuccess;
2460 }
2461
2462 if (redirUPL2)
2463 {
2464 upl_commit(redirUPL2, NULL, 0);
2465 upl_deallocate(redirUPL2);
2466 redirUPL2 = 0;
2467 }
2468 {
2469 // swap the memEntries since they now refer to different vm_objects
2470 void * me = _memEntry;
2471 _memEntry = mapping->memory->_memEntry;
2472 mapping->memory->_memEntry = me;
2473 }
2474 }
2475 else
2476 {
2477
2478 logical = *atAddress;
2479 if( options & kIOMapAnywhere)
2480 // vm_map looks for addresses above here, even when VM_FLAGS_ANYWHERE
2481 ref.mapped = 0;
2482 else {
2483 ref.mapped = trunc_page_32( logical );
2484 if( (logical - ref.mapped) != pageOffset) {
2485 err = kIOReturnVMError;
2486 continue;
2487 }
2488 }
2489
2490 if( ref.sharedMem && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
2491 err = IOIteratePageableMaps( ref.size, &IOMemoryDescriptorMapAlloc, &ref );
2492 else
2493 err = IOMemoryDescriptorMapAlloc( addressMap, &ref );
2494 }
2495
2496 if( err != KERN_SUCCESS)
2497 continue;
2498
2499 if( reserved)
2500 pager = (memory_object_t) reserved->devicePager;
2501 else
2502 pager = MACH_PORT_NULL;
2503
2504 if( !ref.sharedMem || pager )
2505 err = handleFault( pager, addressMap, ref.mapped, sourceOffset, length, options );
2506
2507 } while( false );
2508
2509 if( err != KERN_SUCCESS) {
2510 if( ref.mapped)
2511 doUnmap( addressMap, ref.mapped, ref.size );
2512 *atAddress = NULL;
2513 } else
2514 *atAddress = ref.mapped + pageOffset;
2515
2516 return( err );
2517 }
2518
2519 enum {
2520 kIOMemoryRedirected = 0x00010000
2521 };
2522
2523 IOReturn IOMemoryDescriptor::handleFault(
2524 void * _pager,
2525 vm_map_t addressMap,
2526 IOVirtualAddress address,
2527 IOByteCount sourceOffset,
2528 IOByteCount length,
2529 IOOptionBits options )
2530 {
2531 IOReturn err = kIOReturnSuccess;
2532 memory_object_t pager = (memory_object_t) _pager;
2533 vm_size_t size;
2534 vm_size_t bytes;
2535 vm_size_t page;
2536 IOByteCount pageOffset;
2537 IOByteCount pagerOffset;
2538 IOPhysicalLength segLen;
2539 addr64_t physAddr;
2540
2541 if( !addressMap) {
2542
2543 if( kIOMemoryRedirected & _flags) {
2544 #ifdef DEBUG
2545 IOLog("sleep mem redirect %p, %lx\n", this, sourceOffset);
2546 #endif
2547 do {
2548 SLEEP;
2549 } while( kIOMemoryRedirected & _flags );
2550 }
2551
2552 return( kIOReturnSuccess );
2553 }
2554
2555 physAddr = getPhysicalSegment64( sourceOffset, &segLen );
2556 assert( physAddr );
2557 pageOffset = physAddr - trunc_page_64( physAddr );
2558 pagerOffset = sourceOffset;
2559
2560 size = length + pageOffset;
2561 physAddr -= pageOffset;
2562
2563 segLen += pageOffset;
2564 bytes = size;
2565 do {
2566 // in the middle of the loop only map whole pages
2567 if( segLen >= bytes)
2568 segLen = bytes;
2569 else if( segLen != trunc_page_32( segLen))
2570 err = kIOReturnVMError;
2571 if( physAddr != trunc_page_64( physAddr))
2572 err = kIOReturnBadArgument;
2573
2574 #ifdef DEBUG
2575 if( kIOLogMapping & gIOKitDebug)
2576 IOLog("_IOMemoryMap::map(%p) %08lx->%08qx:%08lx\n",
2577 addressMap, address + pageOffset, physAddr + pageOffset,
2578 segLen - pageOffset);
2579 #endif
2580
2581 if( pager) {
2582 if( reserved && reserved->pagerContig) {
2583 IOPhysicalLength allLen;
2584 addr64_t allPhys;
2585
2586 allPhys = getPhysicalSegment64( 0, &allLen );
2587 assert( allPhys );
2588 err = device_pager_populate_object( pager, 0, allPhys >> PAGE_SHIFT, round_page_32(allLen) );
2589
2590 } else {
2591
2592 for( page = 0;
2593 (page < segLen) && (KERN_SUCCESS == err);
2594 page += page_size) {
2595 err = device_pager_populate_object(pager, pagerOffset,
2596 (ppnum_t)((physAddr + page) >> PAGE_SHIFT), page_size);
2597 pagerOffset += page_size;
2598 }
2599 }
2600 assert( KERN_SUCCESS == err );
2601 if( err)
2602 break;
2603 }
2604
2605 /* *** ALERT *** */
2606 /* *** Temporary Workaround *** */
2607
2608 /* This call to vm_fault causes an early pmap level resolution */
2609 /* of the mappings created above. Need for this is in absolute */
2610 /* violation of the basic tenet that the pmap layer is a cache. */
2611 /* Further, it implies a serious I/O architectural violation on */
2612 /* the part of some user of the mapping. As of this writing, */
2613 /* the call to vm_fault is needed because the NVIDIA driver */
2614 /* makes a call to pmap_extract. The NVIDIA driver needs to be */
2615 /* fixed as soon as possible. The NVIDIA driver should not */
2616 /* need to query for this info as it should know from the doMap */
2617 /* call where the physical memory is mapped. When a query is */
2618 /* necessary to find a physical mapping, it should be done */
2619 /* through an iokit call which includes the mapped memory */
2620 /* handle. This is required for machine architecture independence.*/
2621
2622 if(!(kIOMemoryRedirected & _flags)) {
2623 vm_fault(addressMap,
2624 (vm_map_offset_t)address,
2625 VM_PROT_READ|VM_PROT_WRITE,
2626 FALSE, THREAD_UNINT, NULL,
2627 (vm_map_offset_t)0);
2628 }
2629
2630 /* *** Temporary Workaround *** */
2631 /* *** ALERT *** */
2632
2633 sourceOffset += segLen - pageOffset;
2634 address += segLen;
2635 bytes -= segLen;
2636 pageOffset = 0;
2637
2638 } while( bytes
2639 && (physAddr = getPhysicalSegment64( sourceOffset, &segLen )));
2640
2641 if( bytes)
2642 err = kIOReturnBadArgument;
2643
2644 return( err );
2645 }
2646
2647 IOReturn IOMemoryDescriptor::doUnmap(
2648 vm_map_t addressMap,
2649 IOVirtualAddress logical,
2650 IOByteCount length )
2651 {
2652 IOReturn err;
2653
2654 #ifdef DEBUG
2655 if( kIOLogMapping & gIOKitDebug)
2656 kprintf("IOMemoryDescriptor::doUnmap(%x) %08x:%08x\n",
2657 addressMap, logical, length );
2658 #endif
2659
2660 if( true /* && (addressMap == kernel_map) || (addressMap == get_task_map(current_task()))*/) {
2661
2662 if( _memEntry && (addressMap == kernel_map) && (kIOMemoryBufferPageable & _flags))
2663 addressMap = IOPageableMapForAddress( logical );
2664
2665 err = vm_deallocate( addressMap, logical, length );
2666
2667 } else
2668 err = kIOReturnSuccess;
2669
2670 return( err );
2671 }
2672
2673 IOReturn IOMemoryDescriptor::redirect( task_t safeTask, bool doRedirect )
2674 {
2675 IOReturn err = kIOReturnSuccess;
2676 _IOMemoryMap * mapping = 0;
2677 OSIterator * iter;
2678
2679 LOCK;
2680
2681 if( doRedirect)
2682 _flags |= kIOMemoryRedirected;
2683 else
2684 _flags &= ~kIOMemoryRedirected;
2685
2686 do {
2687 if( (iter = OSCollectionIterator::withCollection( _mappings))) {
2688 while( (mapping = (_IOMemoryMap *) iter->getNextObject()))
2689 mapping->redirect( safeTask, doRedirect );
2690
2691 iter->release();
2692 }
2693 } while( false );
2694
2695 if (!doRedirect)
2696 {
2697 WAKEUP;
2698 }
2699
2700 UNLOCK;
2701
2702 // temporary binary compatibility
2703 IOSubMemoryDescriptor * subMem;
2704 if( (subMem = OSDynamicCast( IOSubMemoryDescriptor, this)))
2705 err = subMem->redirect( safeTask, doRedirect );
2706 else
2707 err = kIOReturnSuccess;
2708
2709 return( err );
2710 }
2711
2712 IOReturn IOSubMemoryDescriptor::redirect( task_t safeTask, bool doRedirect )
2713 {
2714 return( _parent->redirect( safeTask, doRedirect ));
2715 }
2716
2717 IOReturn _IOMemoryMap::redirect( task_t safeTask, bool doRedirect )
2718 {
2719 IOReturn err = kIOReturnSuccess;
2720
2721 if( superMap) {
2722 // err = ((_IOMemoryMap *)superMap)->redirect( safeTask, doRedirect );
2723 } else {
2724
2725 LOCK;
2726
2727 do
2728 {
2729 if (!logical)
2730 break;
2731 if (!addressMap)
2732 break;
2733
2734 if ((!safeTask || (get_task_map(safeTask) != addressMap))
2735 && (0 == (options & kIOMapStatic)))
2736 {
2737 IOUnmapPages( addressMap, logical, length );
2738 if(!doRedirect && safeTask
2739 && (((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
2740 || ((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64)))
2741 {
2742 err = vm_deallocate( addressMap, logical, length );
2743 err = memory->doMap( addressMap, &logical,
2744 (options & ~kIOMapAnywhere) /*| kIOMapReserve*/,
2745 offset, length );
2746 } else
2747 err = kIOReturnSuccess;
2748 #ifdef DEBUG
2749 IOLog("IOMemoryMap::redirect(%d, %p) %x:%lx from %p\n", doRedirect, this, logical, length, addressMap);
2750 #endif
2751 }
2752 else if (kIOMapWriteCombineCache == (options & kIOMapCacheMask))
2753 {
2754 IOOptionBits newMode;
2755 newMode = (options & ~kIOMapCacheMask) | (doRedirect ? kIOMapInhibitCache : kIOMapWriteCombineCache);
2756 IOProtectCacheMode(addressMap, logical, length, newMode);
2757 }
2758 }
2759 while (false);
2760
2761 UNLOCK;
2762 }
2763
2764 if ((((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
2765 || ((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64))
2766 && safeTask
2767 && (doRedirect != (0 != (memory->_flags & kIOMemoryRedirected))))
2768 memory->redirect(safeTask, doRedirect);
2769
2770 return( err );
2771 }
2772
2773 IOReturn _IOMemoryMap::unmap( void )
2774 {
2775 IOReturn err;
2776
2777 LOCK;
2778
2779 if( logical && addressMap && (0 == superMap)
2780 && (0 == (options & kIOMapStatic))) {
2781
2782 err = memory->doUnmap( addressMap, logical, length );
2783 vm_map_deallocate(addressMap);
2784 addressMap = 0;
2785
2786 } else
2787 err = kIOReturnSuccess;
2788
2789 logical = 0;
2790
2791 UNLOCK;
2792
2793 return( err );
2794 }
2795
2796 void _IOMemoryMap::taskDied( void )
2797 {
2798 LOCK;
2799 if( addressMap) {
2800 vm_map_deallocate(addressMap);
2801 addressMap = 0;
2802 }
2803 addressTask = 0;
2804 logical = 0;
2805 UNLOCK;
2806 }
2807
2808 // Overload the release mechanism. All mappings must be a member
2809 // of a memory descriptors _mappings set. This means that we
2810 // always have 2 references on a mapping. When either of these mappings
2811 // are released we need to free ourselves.
2812 void _IOMemoryMap::taggedRelease(const void *tag) const
2813 {
2814 LOCK;
2815 super::taggedRelease(tag, 2);
2816 UNLOCK;
2817 }
2818
2819 void _IOMemoryMap::free()
2820 {
2821 unmap();
2822
2823 if( memory) {
2824 LOCK;
2825 memory->removeMapping( this);
2826 UNLOCK;
2827 memory->release();
2828 }
2829
2830 if (owner && (owner != memory))
2831 {
2832 LOCK;
2833 owner->removeMapping(this);
2834 UNLOCK;
2835 }
2836
2837 if( superMap)
2838 superMap->release();
2839
2840 if (redirUPL) {
2841 upl_commit(redirUPL, NULL, 0);
2842 upl_deallocate(redirUPL);
2843 }
2844
2845 super::free();
2846 }
2847
2848 IOByteCount _IOMemoryMap::getLength()
2849 {
2850 return( length );
2851 }
2852
2853 IOVirtualAddress _IOMemoryMap::getVirtualAddress()
2854 {
2855 return( logical);
2856 }
2857
2858 task_t _IOMemoryMap::getAddressTask()
2859 {
2860 if( superMap)
2861 return( superMap->getAddressTask());
2862 else
2863 return( addressTask);
2864 }
2865
2866 IOOptionBits _IOMemoryMap::getMapOptions()
2867 {
2868 return( options);
2869 }
2870
2871 IOMemoryDescriptor * _IOMemoryMap::getMemoryDescriptor()
2872 {
2873 return( memory );
2874 }
2875
2876 _IOMemoryMap * _IOMemoryMap::copyCompatible(
2877 IOMemoryDescriptor * owner,
2878 task_t task,
2879 IOVirtualAddress toAddress,
2880 IOOptionBits _options,
2881 IOByteCount _offset,
2882 IOByteCount _length )
2883 {
2884 _IOMemoryMap * mapping;
2885
2886 if( (!task) || (!addressMap) || (addressMap != get_task_map(task)))
2887 return( 0 );
2888 if( options & kIOMapUnique)
2889 return( 0 );
2890 if( (options ^ _options) & kIOMapReadOnly)
2891 return( 0 );
2892 if( (kIOMapDefaultCache != (_options & kIOMapCacheMask))
2893 && ((options ^ _options) & kIOMapCacheMask))
2894 return( 0 );
2895
2896 if( (0 == (_options & kIOMapAnywhere)) && (logical != toAddress))
2897 return( 0 );
2898
2899 if( _offset < offset)
2900 return( 0 );
2901
2902 _offset -= offset;
2903
2904 if( (_offset + _length) > length)
2905 return( 0 );
2906
2907 if( (length == _length) && (!_offset)) {
2908 retain();
2909 mapping = this;
2910
2911 } else {
2912 mapping = new _IOMemoryMap;
2913 if( mapping
2914 && !mapping->initCompatible( owner, this, _offset, _length )) {
2915 mapping->release();
2916 mapping = 0;
2917 }
2918 }
2919
2920 return( mapping );
2921 }
2922
2923 IOPhysicalAddress
2924 _IOMemoryMap::getPhysicalSegment( IOByteCount _offset, IOPhysicalLength * _length)
2925 {
2926 IOPhysicalAddress address;
2927
2928 LOCK;
2929 address = memory->getPhysicalSegment( offset + _offset, _length );
2930 UNLOCK;
2931
2932 return( address );
2933 }
2934
2935 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2936
2937 #undef super
2938 #define super OSObject
2939
2940 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2941
2942 void IOMemoryDescriptor::initialize( void )
2943 {
2944 if( 0 == gIOMemoryLock)
2945 gIOMemoryLock = IORecursiveLockAlloc();
2946
2947 IORegistryEntry::getRegistryRoot()->setProperty(kIOMaximumMappedIOByteCountKey,
2948 ptoa_64(gIOMaximumMappedIOPageCount), 64);
2949 if (!gIOCopyMapper)
2950 {
2951 IOMapper *
2952 mapper = new IOCopyMapper;
2953 if (mapper)
2954 {
2955 if (mapper->init() && mapper->start(NULL))
2956 gIOCopyMapper = (IOCopyMapper *) mapper;
2957 else
2958 mapper->release();
2959 }
2960 }
2961
2962 gIOLastPage = IOGetLastPageNumber();
2963 }
2964
2965 void IOMemoryDescriptor::free( void )
2966 {
2967 if( _mappings)
2968 _mappings->release();
2969
2970 super::free();
2971 }
2972
2973 IOMemoryMap * IOMemoryDescriptor::setMapping(
2974 task_t intoTask,
2975 IOVirtualAddress mapAddress,
2976 IOOptionBits options )
2977 {
2978 _IOMemoryMap * newMap;
2979
2980 newMap = new _IOMemoryMap;
2981
2982 LOCK;
2983
2984 if( newMap
2985 && !newMap->initWithDescriptor( this, intoTask, mapAddress,
2986 options | kIOMapStatic, 0, getLength() )) {
2987 newMap->release();
2988 newMap = 0;
2989 }
2990
2991 addMapping( newMap);
2992
2993 UNLOCK;
2994
2995 return( newMap);
2996 }
2997
2998 IOMemoryMap * IOMemoryDescriptor::map(
2999 IOOptionBits options )
3000 {
3001
3002 return( makeMapping( this, kernel_task, 0,
3003 options | kIOMapAnywhere,
3004 0, getLength() ));
3005 }
3006
3007 IOMemoryMap * IOMemoryDescriptor::map(
3008 task_t intoTask,
3009 IOVirtualAddress toAddress,
3010 IOOptionBits options,
3011 IOByteCount offset,
3012 IOByteCount length )
3013 {
3014 if( 0 == length)
3015 length = getLength();
3016
3017 return( makeMapping( this, intoTask, toAddress, options, offset, length ));
3018 }
3019
3020 IOReturn _IOMemoryMap::redirect(IOMemoryDescriptor * newBackingMemory,
3021 IOOptionBits options,
3022 IOByteCount offset)
3023 {
3024 IOReturn err = kIOReturnSuccess;
3025 IOMemoryDescriptor * physMem = 0;
3026
3027 LOCK;
3028
3029 if (logical && addressMap) do
3030 {
3031 if (((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
3032 || ((memory->_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64))
3033 {
3034 physMem = memory;
3035 physMem->retain();
3036 }
3037
3038 if (!redirUPL)
3039 {
3040 vm_size_t size = length;
3041 int flags = UPL_COPYOUT_FROM | UPL_SET_INTERNAL
3042 | UPL_SET_LITE | UPL_SET_IO_WIRE | UPL_BLOCK_ACCESS;
3043 if (KERN_SUCCESS != memory_object_iopl_request((ipc_port_t) memory->_memEntry, 0, &size, &redirUPL,
3044 NULL, NULL,
3045 &flags))
3046 redirUPL = 0;
3047
3048 if (physMem)
3049 {
3050 IOUnmapPages( addressMap, logical, length );
3051 physMem->redirect(0, true);
3052 }
3053 }
3054
3055 if (newBackingMemory)
3056 {
3057 if (newBackingMemory != memory)
3058 {
3059 if (this != newBackingMemory->makeMapping(newBackingMemory, addressTask, (IOVirtualAddress) this,
3060 options | kIOMapUnique | kIOMapReference,
3061 offset, length))
3062 err = kIOReturnError;
3063 }
3064 if (redirUPL)
3065 {
3066 upl_commit(redirUPL, NULL, 0);
3067 upl_deallocate(redirUPL);
3068 redirUPL = 0;
3069 }
3070 if (physMem)
3071 physMem->redirect(0, false);
3072 }
3073 }
3074 while (false);
3075
3076 UNLOCK;
3077
3078 if (physMem)
3079 physMem->release();
3080
3081 return (err);
3082 }
3083
3084 IOMemoryMap * IOMemoryDescriptor::makeMapping(
3085 IOMemoryDescriptor * owner,
3086 task_t intoTask,
3087 IOVirtualAddress toAddress,
3088 IOOptionBits options,
3089 IOByteCount offset,
3090 IOByteCount length )
3091 {
3092 IOMemoryDescriptor * mapDesc = 0;
3093 _IOMemoryMap * mapping = 0;
3094 OSIterator * iter;
3095
3096 LOCK;
3097
3098 do
3099 {
3100 if (kIOMapUnique & options)
3101 {
3102 IOPhysicalAddress phys;
3103 IOByteCount physLen;
3104
3105 if (owner != this)
3106 continue;
3107
3108 if (((_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical)
3109 || ((_flags & kIOMemoryTypeMask) == kIOMemoryTypePhysical64))
3110 {
3111 phys = getPhysicalSegment(offset, &physLen);
3112 if (!phys || (physLen < length))
3113 continue;
3114
3115 mapDesc = IOMemoryDescriptor::withPhysicalAddress(
3116 phys, length, _direction);
3117 if (!mapDesc)
3118 continue;
3119 offset = 0;
3120 }
3121 else
3122 {
3123 mapDesc = this;
3124 mapDesc->retain();
3125 }
3126
3127 if (kIOMapReference & options)
3128 {
3129 mapping = (_IOMemoryMap *) toAddress;
3130 mapping->retain();
3131
3132 #if 1
3133 uint32_t pageOffset1 = mapDesc->getSourceSegment( offset, NULL );
3134 pageOffset1 -= trunc_page_32( pageOffset1 );
3135
3136 uint32_t pageOffset2 = mapping->getVirtualAddress();
3137 pageOffset2 -= trunc_page_32( pageOffset2 );
3138
3139 if (pageOffset1 != pageOffset2)
3140 IOLog("::redirect can't map offset %x to addr %x\n",
3141 pageOffset1, mapping->getVirtualAddress());
3142 #endif
3143
3144
3145 if (!mapping->initWithDescriptor( mapDesc, intoTask, toAddress, options,
3146 offset, length ))
3147 {
3148 #ifdef DEBUG
3149 IOLog("Didn't redirect map %08lx : %08lx\n", offset, length );
3150 #endif
3151 }
3152
3153 if (mapping->owner)
3154 mapping->owner->removeMapping(mapping);
3155 continue;
3156 }
3157 }
3158 else
3159 {
3160 // look for an existing mapping
3161 if( (iter = OSCollectionIterator::withCollection( _mappings))) {
3162
3163 while( (mapping = (_IOMemoryMap *) iter->getNextObject())) {
3164
3165 if( (mapping = mapping->copyCompatible(
3166 owner, intoTask, toAddress,
3167 options | kIOMapReference,
3168 offset, length )))
3169 break;
3170 }
3171 iter->release();
3172 }
3173
3174
3175 if (mapping)
3176 mapping->retain();
3177
3178 if( mapping || (options & kIOMapReference))
3179 continue;
3180
3181 mapDesc = owner;
3182 mapDesc->retain();
3183 }
3184 owner = this;
3185
3186 mapping = new _IOMemoryMap;
3187 if( mapping
3188 && !mapping->initWithDescriptor( mapDesc, intoTask, toAddress, options,
3189 offset, length )) {
3190 #ifdef DEBUG
3191 IOLog("Didn't make map %08lx : %08lx\n", offset, length );
3192 #endif
3193 mapping->release();
3194 mapping = 0;
3195 }
3196
3197 if (mapping)
3198 mapping->retain();
3199
3200 } while( false );
3201
3202 if (mapping)
3203 {
3204 mapping->owner = owner;
3205 owner->addMapping( mapping);
3206 mapping->release();
3207 }
3208
3209 UNLOCK;
3210
3211 if (mapDesc)
3212 mapDesc->release();
3213
3214 return( mapping);
3215 }
3216
3217 void IOMemoryDescriptor::addMapping(
3218 IOMemoryMap * mapping )
3219 {
3220 if( mapping) {
3221 if( 0 == _mappings)
3222 _mappings = OSSet::withCapacity(1);
3223 if( _mappings )
3224 _mappings->setObject( mapping );
3225 }
3226 }
3227
3228 void IOMemoryDescriptor::removeMapping(
3229 IOMemoryMap * mapping )
3230 {
3231 if( _mappings)
3232 _mappings->removeObject( mapping);
3233 }
3234
3235 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
3236
3237 #undef super
3238 #define super IOMemoryDescriptor
3239
3240 OSDefineMetaClassAndStructors(IOSubMemoryDescriptor, IOMemoryDescriptor)
3241
3242 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
3243
3244 bool IOSubMemoryDescriptor::initSubRange( IOMemoryDescriptor * parent,
3245 IOByteCount offset, IOByteCount length,
3246 IODirection direction )
3247 {
3248 if( !parent)
3249 return( false);
3250
3251 if( (offset + length) > parent->getLength())
3252 return( false);
3253
3254 /*
3255 * We can check the _parent instance variable before having ever set it
3256 * to an initial value because I/O Kit guarantees that all our instance
3257 * variables are zeroed on an object's allocation.
3258 */
3259
3260 if( !_parent) {
3261 if( !super::init())
3262 return( false );
3263 } else {
3264 /*
3265 * An existing memory descriptor is being retargeted to
3266 * point to somewhere else. Clean up our present state.
3267 */
3268
3269 _parent->release();
3270 _parent = 0;
3271 }
3272
3273 parent->retain();
3274 _parent = parent;
3275 _start = offset;
3276 _length = length;
3277 _direction = direction;
3278 _tag = parent->getTag();
3279
3280 return( true );
3281 }
3282
3283 void IOSubMemoryDescriptor::free( void )
3284 {
3285 if( _parent)
3286 _parent->release();
3287
3288 super::free();
3289 }
3290
3291
3292 IOReturn
3293 IOSubMemoryDescriptor::dmaCommandOperation(DMACommandOps op, void *vData, UInt dataSize) const
3294 {
3295 IOReturn rtn;
3296
3297 if (kIOMDGetCharacteristics == op) {
3298
3299 rtn = _parent->dmaCommandOperation(op, vData, dataSize);
3300 if (kIOReturnSuccess == rtn) {
3301 IOMDDMACharacteristics *data = (IOMDDMACharacteristics *) vData;
3302 data->fLength = _length;
3303 data->fSGCount = 0; // XXX gvdl: need to compute and pages
3304 data->fPages = 0;
3305 data->fPageAlign = 0;
3306 }
3307
3308 return rtn;
3309 }
3310 else if (kIOMDWalkSegments & op) {
3311 if (dataSize < sizeof(IOMDDMAWalkSegmentArgs))
3312 return kIOReturnUnderrun;
3313
3314 IOMDDMAWalkSegmentArgs *data =
3315 reinterpret_cast<IOMDDMAWalkSegmentArgs *>(vData);
3316 UInt offset = data->fOffset;
3317 UInt remain = _length - offset;
3318 if ((int) remain <= 0)
3319 return (!remain)? kIOReturnOverrun : kIOReturnInternalError;
3320
3321 data->fOffset = offset + _start;
3322 rtn = _parent->dmaCommandOperation(op, vData, dataSize);
3323 if (data->fLength > remain)
3324 data->fLength = remain;
3325 data->fOffset = offset;
3326
3327 return rtn;
3328 }
3329 else
3330 return kIOReturnBadArgument;
3331 }
3332
3333 addr64_t
3334 IOSubMemoryDescriptor::getPhysicalSegment64(IOByteCount offset, IOByteCount * length)
3335 {
3336 addr64_t address;
3337 IOByteCount actualLength;
3338
3339 assert(offset <= _length);
3340
3341 if( length)
3342 *length = 0;
3343
3344 if( offset >= _length)
3345 return( 0 );
3346
3347 address = _parent->getPhysicalSegment64( offset + _start, &actualLength );
3348
3349 if( address && length)
3350 *length = min( _length - offset, actualLength );
3351
3352 return( address );
3353 }
3354
3355 IOPhysicalAddress
3356 IOSubMemoryDescriptor::getPhysicalSegment( IOByteCount offset, IOByteCount * length )
3357 {
3358 IOPhysicalAddress address;
3359 IOByteCount actualLength;
3360
3361 assert(offset <= _length);
3362
3363 if( length)
3364 *length = 0;
3365
3366 if( offset >= _length)
3367 return( 0 );
3368
3369 address = _parent->getPhysicalSegment( offset + _start, &actualLength );
3370
3371 if( address && length)
3372 *length = min( _length - offset, actualLength );
3373
3374 return( address );
3375 }
3376
3377
3378 IOReturn IOSubMemoryDescriptor::doMap(
3379 vm_map_t addressMap,
3380 IOVirtualAddress * atAddress,
3381 IOOptionBits options,
3382 IOByteCount sourceOffset,
3383 IOByteCount length )
3384 {
3385 if( sourceOffset >= _length)
3386 return( kIOReturnOverrun );
3387 return (_parent->doMap(addressMap, atAddress, options, sourceOffset + _start, length));
3388 }
3389
3390 IOPhysicalAddress
3391 IOSubMemoryDescriptor::getSourceSegment( IOByteCount offset, IOByteCount * length )
3392 {
3393 IOPhysicalAddress address;
3394 IOByteCount actualLength;
3395
3396 assert(offset <= _length);
3397
3398 if( length)
3399 *length = 0;
3400
3401 if( offset >= _length)
3402 return( 0 );
3403
3404 address = _parent->getSourceSegment( offset + _start, &actualLength );
3405
3406 if( address && length)
3407 *length = min( _length - offset, actualLength );
3408
3409 return( address );
3410 }
3411
3412 void * IOSubMemoryDescriptor::getVirtualSegment(IOByteCount offset,
3413 IOByteCount * lengthOfSegment)
3414 {
3415 return( 0 );
3416 }
3417
3418 IOByteCount IOSubMemoryDescriptor::readBytes(IOByteCount offset,
3419 void * bytes, IOByteCount length)
3420 {
3421 IOByteCount byteCount;
3422
3423 assert(offset <= _length);
3424
3425 if( offset >= _length)
3426 return( 0 );
3427
3428 LOCK;
3429 byteCount = _parent->readBytes( _start + offset, bytes,
3430 min(length, _length - offset) );
3431 UNLOCK;
3432
3433 return( byteCount );
3434 }
3435
3436 IOByteCount IOSubMemoryDescriptor::writeBytes(IOByteCount offset,
3437 const void* bytes, IOByteCount length)
3438 {
3439 IOByteCount byteCount;
3440
3441 assert(offset <= _length);
3442
3443 if( offset >= _length)
3444 return( 0 );
3445
3446 LOCK;
3447 byteCount = _parent->writeBytes( _start + offset, bytes,
3448 min(length, _length - offset) );
3449 UNLOCK;
3450
3451 return( byteCount );
3452 }
3453
3454 IOReturn IOSubMemoryDescriptor::setPurgeable( IOOptionBits newState,
3455 IOOptionBits * oldState )
3456 {
3457 IOReturn err;
3458
3459 LOCK;
3460 err = _parent->setPurgeable( newState, oldState );
3461 UNLOCK;
3462
3463 return( err );
3464 }
3465
3466 IOReturn IOSubMemoryDescriptor::performOperation( IOOptionBits options,
3467 IOByteCount offset, IOByteCount length )
3468 {
3469 IOReturn err;
3470
3471 assert(offset <= _length);
3472
3473 if( offset >= _length)
3474 return( kIOReturnOverrun );
3475
3476 LOCK;
3477 err = _parent->performOperation( options, _start + offset,
3478 min(length, _length - offset) );
3479 UNLOCK;
3480
3481 return( err );
3482 }
3483
3484 IOReturn IOSubMemoryDescriptor::prepare(
3485 IODirection forDirection)
3486 {
3487 IOReturn err;
3488
3489 LOCK;
3490 err = _parent->prepare( forDirection);
3491 UNLOCK;
3492
3493 return( err );
3494 }
3495
3496 IOReturn IOSubMemoryDescriptor::complete(
3497 IODirection forDirection)
3498 {
3499 IOReturn err;
3500
3501 LOCK;
3502 err = _parent->complete( forDirection);
3503 UNLOCK;
3504
3505 return( err );
3506 }
3507
3508 IOMemoryMap * IOSubMemoryDescriptor::makeMapping(
3509 IOMemoryDescriptor * owner,
3510 task_t intoTask,
3511 IOVirtualAddress toAddress,
3512 IOOptionBits options,
3513 IOByteCount offset,
3514 IOByteCount length )
3515 {
3516 IOMemoryMap * mapping = 0;
3517
3518 if (!(kIOMapUnique & options))
3519 mapping = (IOMemoryMap *) _parent->makeMapping(
3520 _parent, intoTask,
3521 toAddress - (_start + offset),
3522 options | kIOMapReference,
3523 _start + offset, length );
3524
3525 if( !mapping)
3526 mapping = (IOMemoryMap *) _parent->makeMapping(
3527 _parent, intoTask,
3528 toAddress,
3529 options, _start + offset, length );
3530
3531 if( !mapping)
3532 mapping = super::makeMapping( owner, intoTask, toAddress, options,
3533 offset, length );
3534
3535 return( mapping );
3536 }
3537
3538 /* ick */
3539
3540 bool
3541 IOSubMemoryDescriptor::initWithAddress(void * address,
3542 IOByteCount length,
3543 IODirection direction)
3544 {
3545 return( false );
3546 }
3547
3548 bool
3549 IOSubMemoryDescriptor::initWithAddress(vm_address_t address,
3550 IOByteCount length,
3551 IODirection direction,
3552 task_t task)
3553 {
3554 return( false );
3555 }
3556
3557 bool
3558 IOSubMemoryDescriptor::initWithPhysicalAddress(
3559 IOPhysicalAddress address,
3560 IOByteCount length,
3561 IODirection direction )
3562 {
3563 return( false );
3564 }
3565
3566 bool
3567 IOSubMemoryDescriptor::initWithRanges(
3568 IOVirtualRange * ranges,
3569 UInt32 withCount,
3570 IODirection direction,
3571 task_t task,
3572 bool asReference)
3573 {
3574 return( false );
3575 }
3576
3577 bool
3578 IOSubMemoryDescriptor::initWithPhysicalRanges( IOPhysicalRange * ranges,
3579 UInt32 withCount,
3580 IODirection direction,
3581 bool asReference)
3582 {
3583 return( false );
3584 }
3585
3586 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
3587
3588 bool IOGeneralMemoryDescriptor::serialize(OSSerialize * s) const
3589 {
3590 OSSymbol const *keys[2];
3591 OSObject *values[2];
3592 struct SerData {
3593 user_addr_t address;
3594 user_size_t length;
3595 } *vcopy;
3596 unsigned int index, nRanges;
3597 bool result;
3598
3599 IOOptionBits type = _flags & kIOMemoryTypeMask;
3600
3601 if (s == NULL) return false;
3602 if (s->previouslySerialized(this)) return true;
3603
3604 // Pretend we are an array.
3605 if (!s->addXMLStartTag(this, "array")) return false;
3606
3607 nRanges = _rangesCount;
3608 vcopy = (SerData *) IOMalloc(sizeof(SerData) * nRanges);
3609 if (vcopy == 0) return false;
3610
3611 keys[0] = OSSymbol::withCString("address");
3612 keys[1] = OSSymbol::withCString("length");
3613
3614 result = false;
3615 values[0] = values[1] = 0;
3616
3617 // From this point on we can go to bail.
3618
3619 // Copy the volatile data so we don't have to allocate memory
3620 // while the lock is held.
3621 LOCK;
3622 if (nRanges == _rangesCount) {
3623 Ranges vec = _ranges;
3624 for (index = 0; index < nRanges; index++) {
3625 user_addr_t addr; IOByteCount len;
3626 getAddrLenForInd(addr, len, type, vec, index);
3627 vcopy[index].address = addr;
3628 vcopy[index].length = len;
3629 }
3630 } else {
3631 // The descriptor changed out from under us. Give up.
3632 UNLOCK;
3633 result = false;
3634 goto bail;
3635 }
3636 UNLOCK;
3637
3638 for (index = 0; index < nRanges; index++)
3639 {
3640 user_addr_t addr = vcopy[index].address;
3641 IOByteCount len = (IOByteCount) vcopy[index].length;
3642 values[0] =
3643 OSNumber::withNumber(addr, (((UInt64) addr) >> 32)? 64 : 32);
3644 if (values[0] == 0) {
3645 result = false;
3646 goto bail;
3647 }
3648 values[1] = OSNumber::withNumber(len, sizeof(len) * 8);
3649 if (values[1] == 0) {
3650 result = false;
3651 goto bail;
3652 }
3653 OSDictionary *dict = OSDictionary::withObjects((const OSObject **)values, (const OSSymbol **)keys, 2);
3654 if (dict == 0) {
3655 result = false;
3656 goto bail;
3657 }
3658 values[0]->release();
3659 values[1]->release();
3660 values[0] = values[1] = 0;
3661
3662 result = dict->serialize(s);
3663 dict->release();
3664 if (!result) {
3665 goto bail;
3666 }
3667 }
3668 result = s->addXMLEndTag("array");
3669
3670 bail:
3671 if (values[0])
3672 values[0]->release();
3673 if (values[1])
3674 values[1]->release();
3675 if (keys[0])
3676 keys[0]->release();
3677 if (keys[1])
3678 keys[1]->release();
3679 if (vcopy)
3680 IOFree(vcopy, sizeof(IOVirtualRange) * nRanges);
3681 return result;
3682 }
3683
3684 bool IOSubMemoryDescriptor::serialize(OSSerialize * s) const
3685 {
3686 if (!s) {
3687 return (false);
3688 }
3689 if (s->previouslySerialized(this)) return true;
3690
3691 // Pretend we are a dictionary.
3692 // We must duplicate the functionality of OSDictionary here
3693 // because otherwise object references will not work;
3694 // they are based on the value of the object passed to
3695 // previouslySerialized and addXMLStartTag.
3696
3697 if (!s->addXMLStartTag(this, "dict")) return false;
3698
3699 char const *keys[3] = {"offset", "length", "parent"};
3700
3701 OSObject *values[3];
3702 values[0] = OSNumber::withNumber(_start, sizeof(_start) * 8);
3703 if (values[0] == 0)
3704 return false;
3705 values[1] = OSNumber::withNumber(_length, sizeof(_length) * 8);
3706 if (values[1] == 0) {
3707 values[0]->release();
3708 return false;
3709 }
3710 values[2] = _parent;
3711
3712 bool result = true;
3713 for (int i=0; i<3; i++) {
3714 if (!s->addString("<key>") ||
3715 !s->addString(keys[i]) ||
3716 !s->addXMLEndTag("key") ||
3717 !values[i]->serialize(s)) {
3718 result = false;
3719 break;
3720 }
3721 }
3722 values[0]->release();
3723 values[1]->release();
3724 if (!result) {
3725 return false;
3726 }
3727
3728 return s->addXMLEndTag("dict");
3729 }
3730
3731 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
3732
3733 OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 0);
3734 OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 1);
3735 OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 2);
3736 OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 3);
3737 OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 4);
3738 OSMetaClassDefineReservedUsed(IOMemoryDescriptor, 5);
3739 OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 6);
3740 OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 7);
3741 OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 8);
3742 OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 9);
3743 OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 10);
3744 OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 11);
3745 OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 12);
3746 OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 13);
3747 OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 14);
3748 OSMetaClassDefineReservedUnused(IOMemoryDescriptor, 15);
3749
3750 /* ex-inline function implementation */
3751 IOPhysicalAddress
3752 IOMemoryDescriptor::getPhysicalAddress()
3753 { return( getPhysicalSegment( 0, 0 )); }
3754
3755
3756
mirror of XNU