/*
- * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2005-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
+#define IOKIT_ENABLE_SHARED_PTR
+
#include <IOKit/assert.h>
#include <libkern/OSTypes.h>
#include <libkern/OSByteOrder.h>
+#include <libkern/OSDebug.h>
#include <IOKit/IOReturn.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOBufferMemoryDescriptor.h>
#include "IOKitKernelInternal.h"
-#include "IOCopyMapper.h"
-
-#define MAPTYPE(type) ((UInt) (type) & kTypeMask)
-#define IS_MAPPED(type) (MAPTYPE(type) == kMapped)
-#define IS_BYPASSED(type) (MAPTYPE(type) == kBypassed)
-#define IS_NONCOHERENT(type) (MAPTYPE(type) == kNonCoherent)
-
-static bool gIOEnableCopyMapper = true;
-
-enum
-{
- kWalkSyncIn = 0x01, // bounce -> md
- kWalkSyncOut = 0x02, // bounce <- md
- kWalkSyncAlways = 0x04,
- kWalkPreflight = 0x08,
- kWalkDoubleBuffer = 0x10,
- kWalkPrepare = 0x20,
- kWalkComplete = 0x40,
- kWalkClient = 0x80
+#define MAPTYPE(type) ((UInt) (type) & kTypeMask)
+#define IS_NONCOHERENT(type) (MAPTYPE(type) == kNonCoherent)
+
+enum{
+ kWalkSyncIn = 0x01,// bounce -> md
+ kWalkSyncOut = 0x02,// bounce <- md
+ kWalkSyncAlways = 0x04,
+ kWalkPreflight = 0x08,
+ kWalkDoubleBuffer = 0x10,
+ kWalkPrepare = 0x20,
+ kWalkComplete = 0x40,
+ kWalkClient = 0x80
};
-struct ExpansionData
-{
- IOMDDMAWalkSegmentState fState;
- IOMDDMACharacteristics fMDSummary;
-
- UInt64 fPreparedOffset;
- UInt64 fPreparedLength;
-
- UInt8 fCursor;
- UInt8 fCheckAddressing;
- UInt8 fIterateOnly;
- UInt8 fMisaligned;
- UInt8 fCopyContig;
- UInt8 fPrepared;
- UInt8 fDoubleBuffer;
- UInt8 __pad[1];
-
- ppnum_t fCopyPageAlloc;
- ppnum_t fCopyPageCount;
- addr64_t fCopyNext;
-
- class IOBufferMemoryDescriptor * fCopyMD;
-};
-typedef ExpansionData IODMACommandInternal;
#define fInternalState reserved
#define fState reserved->fState
#if 1
// no direction => OutIn
-#define SHOULD_COPY_DIR(op, direction) \
- ((kIODirectionNone == (direction)) \
- || (kWalkSyncAlways & (op)) \
+#define SHOULD_COPY_DIR(op, direction) \
+ ((kIODirectionNone == (direction)) \
+ || (kWalkSyncAlways & (op)) \
|| (((kWalkSyncIn & (op)) ? kIODirectionIn : kIODirectionOut) \
- & (direction)))
+ & (direction)))
#else
#define SHOULD_COPY_DIR(state, direction) (true)
#endif
#if 0
-#define DEBG(fmt, args...) { kprintf(fmt, ## args); }
+#define DEBG(fmt, args...) { IOLog(fmt, ## args); kprintf(fmt, ## args); }
#else
-#define DEBG(fmt, args...) {}
+#define DEBG(fmt, args...) {}
#endif
+#if 0
+#define LOGTAG 0x87654321
+#endif
/**************************** class IODMACommand ***************************/
#undef super
-#define super OSObject
-OSDefineMetaClassAndStructors(IODMACommand, IOCommand);
-
-OSMetaClassDefineReservedUnused(IODMACommand, 0);
-OSMetaClassDefineReservedUnused(IODMACommand, 1);
-OSMetaClassDefineReservedUnused(IODMACommand, 2);
-OSMetaClassDefineReservedUnused(IODMACommand, 3);
-OSMetaClassDefineReservedUnused(IODMACommand, 4);
-OSMetaClassDefineReservedUnused(IODMACommand, 5);
-OSMetaClassDefineReservedUnused(IODMACommand, 6);
-OSMetaClassDefineReservedUnused(IODMACommand, 7);
-OSMetaClassDefineReservedUnused(IODMACommand, 8);
-OSMetaClassDefineReservedUnused(IODMACommand, 9);
+#define super IOCommand
+OSDefineMetaClassAndStructorsWithZone(IODMACommand, IOCommand, ZC_NONE);
+
+OSMetaClassDefineReservedUsedX86(IODMACommand, 0);
+OSMetaClassDefineReservedUsedX86(IODMACommand, 1);
+OSMetaClassDefineReservedUsedX86(IODMACommand, 2);
+OSMetaClassDefineReservedUsedX86(IODMACommand, 3);
+OSMetaClassDefineReservedUsedX86(IODMACommand, 4);
+OSMetaClassDefineReservedUsedX86(IODMACommand, 5);
+OSMetaClassDefineReservedUsedX86(IODMACommand, 6);
+OSMetaClassDefineReservedUnused(IODMACommand, 7);
+OSMetaClassDefineReservedUnused(IODMACommand, 8);
+OSMetaClassDefineReservedUnused(IODMACommand, 9);
OSMetaClassDefineReservedUnused(IODMACommand, 10);
OSMetaClassDefineReservedUnused(IODMACommand, 11);
OSMetaClassDefineReservedUnused(IODMACommand, 12);
OSMetaClassDefineReservedUnused(IODMACommand, 14);
OSMetaClassDefineReservedUnused(IODMACommand, 15);
-IODMACommand *
+
+OSSharedPtr<IODMACommand>
+IODMACommand::withRefCon(void * refCon)
+{
+ OSSharedPtr<IODMACommand> me = OSMakeShared<IODMACommand>();
+
+ if (me && !me->initWithRefCon(refCon)) {
+ return nullptr;
+ }
+
+ return me;
+}
+
+OSSharedPtr<IODMACommand>
+IODMACommand::withSpecification(SegmentFunction outSegFunc,
+ const SegmentOptions * segmentOptions,
+ uint32_t mappingOptions,
+ IOMapper * mapper,
+ void * refCon)
+{
+ OSSharedPtr<IODMACommand> me = OSMakeShared<IODMACommand>();
+
+ if (me && !me->initWithSpecification(outSegFunc, segmentOptions, mappingOptions,
+ mapper, refCon)) {
+ return nullptr;
+ }
+
+ return me;
+}
+
+OSSharedPtr<IODMACommand>
IODMACommand::withSpecification(SegmentFunction outSegFunc,
- UInt8 numAddressBits,
- UInt64 maxSegmentSize,
- MappingOptions mappingOptions,
- UInt64 maxTransferSize,
- UInt32 alignment,
- IOMapper *mapper,
- void *refCon)
+ UInt8 numAddressBits,
+ UInt64 maxSegmentSize,
+ MappingOptions mappingOptions,
+ UInt64 maxTransferSize,
+ UInt32 alignment,
+ IOMapper *mapper,
+ void *refCon)
{
- IODMACommand * me = new IODMACommand;
+ OSSharedPtr<IODMACommand> me = OSMakeShared<IODMACommand>();
- if (me && !me->initWithSpecification(outSegFunc,
- numAddressBits, maxSegmentSize,
- mappingOptions, maxTransferSize,
- alignment, mapper, refCon))
- {
- me->release();
- return 0;
- };
+ if (me && !me->initWithSpecification(outSegFunc,
+ numAddressBits, maxSegmentSize,
+ mappingOptions, maxTransferSize,
+ alignment, mapper, refCon)) {
+ return nullptr;
+ }
- return me;
+ return me;
}
-IODMACommand *
+OSSharedPtr<IODMACommand>
IODMACommand::cloneCommand(void *refCon)
{
- return withSpecification(fOutSeg, fNumAddressBits, fMaxSegmentSize,
- fMappingOptions, fMaxTransferSize, fAlignMask + 1, fMapper, refCon);
+ SegmentOptions segmentOptions =
+ {
+ .fStructSize = sizeof(segmentOptions),
+ .fNumAddressBits = (uint8_t)fNumAddressBits,
+ .fMaxSegmentSize = fMaxSegmentSize,
+ .fMaxTransferSize = fMaxTransferSize,
+ .fAlignment = fAlignMask + 1,
+ .fAlignmentLength = fAlignMaskInternalSegments + 1,
+ .fAlignmentInternalSegments = fAlignMaskLength + 1
+ };
+
+ return IODMACommand::withSpecification(fOutSeg, &segmentOptions,
+ fMappingOptions, fMapper.get(), refCon);
}
#define kLastOutputFunction ((SegmentFunction) kLastOutputFunction)
+bool
+IODMACommand::initWithRefCon(void * refCon)
+{
+ if (!super::init()) {
+ return false;
+ }
+
+ if (!reserved) {
+ reserved = IONew(IODMACommandInternal, 1);
+ if (!reserved) {
+ return false;
+ }
+ }
+ bzero(reserved, sizeof(IODMACommandInternal));
+ fRefCon = refCon;
+
+ return true;
+}
+
+bool
+IODMACommand::initWithSpecification(SegmentFunction outSegFunc,
+ const SegmentOptions * segmentOptions,
+ uint32_t mappingOptions,
+ IOMapper * mapper,
+ void * refCon)
+{
+ if (!initWithRefCon(refCon)) {
+ return false;
+ }
+
+ if (kIOReturnSuccess != setSpecification(outSegFunc, segmentOptions,
+ mappingOptions, mapper)) {
+ return false;
+ }
+
+ return true;
+}
+
bool
IODMACommand::initWithSpecification(SegmentFunction outSegFunc,
- UInt8 numAddressBits,
- UInt64 maxSegmentSize,
- MappingOptions mappingOptions,
- UInt64 maxTransferSize,
- UInt32 alignment,
- IOMapper *mapper,
- void *refCon)
-{
- if (!super::init() || !outSegFunc || !numAddressBits)
- return false;
-
- bool is32Bit = (OutputHost32 == outSegFunc || OutputBig32 == outSegFunc
- || OutputLittle32 == outSegFunc);
- if (is32Bit)
- {
- if (!numAddressBits)
- numAddressBits = 32;
- else if (numAddressBits > 32)
- return false; // Wrong output function for bits
- }
-
- if (numAddressBits && (numAddressBits < PAGE_SHIFT))
- return false;
-
- if (!maxSegmentSize)
- maxSegmentSize--; // Set Max segment to -1
- if (!maxTransferSize)
- maxTransferSize--; // Set Max transfer to -1
-
- if (!mapper)
- {
- IOMapper::checkForSystemMapper();
- mapper = IOMapper::gSystem;
- }
-
- fNumSegments = 0;
- fBypassMask = 0;
- fOutSeg = outSegFunc;
- fNumAddressBits = numAddressBits;
- fMaxSegmentSize = maxSegmentSize;
- fMappingOptions = mappingOptions;
- fMaxTransferSize = maxTransferSize;
- if (!alignment)
- alignment = 1;
- fAlignMask = alignment - 1;
- fMapper = mapper;
- fRefCon = refCon;
-
- switch (MAPTYPE(mappingOptions))
- {
- case kMapped: break;
- case kNonCoherent: fMapper = 0; break;
- case kBypassed:
- if (mapper && !mapper->getBypassMask(&fBypassMask))
- return false;
- break;
- default:
- return false;
- };
-
- reserved = IONew(ExpansionData, 1);
- if (!reserved)
- return false;
- bzero(reserved, sizeof(ExpansionData));
-
- fInternalState->fIterateOnly = (0 != (kIterateOnly & mappingOptions));
-
- return true;
+ UInt8 numAddressBits,
+ UInt64 maxSegmentSize,
+ MappingOptions mappingOptions,
+ UInt64 maxTransferSize,
+ UInt32 alignment,
+ IOMapper *mapper,
+ void *refCon)
+{
+ SegmentOptions segmentOptions =
+ {
+ .fStructSize = sizeof(segmentOptions),
+ .fNumAddressBits = numAddressBits,
+ .fMaxSegmentSize = maxSegmentSize,
+ .fMaxTransferSize = maxTransferSize,
+ .fAlignment = alignment,
+ .fAlignmentLength = 1,
+ .fAlignmentInternalSegments = alignment
+ };
+
+ return initWithSpecification(outSegFunc, &segmentOptions, mappingOptions, mapper, refCon);
+}
+
+IOReturn
+IODMACommand::setSpecification(SegmentFunction outSegFunc,
+ const SegmentOptions * segmentOptions,
+ uint32_t mappingOptions,
+ IOMapper * mapper)
+{
+ IOService * device = NULL;
+ UInt8 numAddressBits;
+ UInt64 maxSegmentSize;
+ UInt64 maxTransferSize;
+ UInt32 alignment;
+
+ bool is32Bit;
+
+ if (!outSegFunc || !segmentOptions) {
+ return kIOReturnBadArgument;
+ }
+
+ is32Bit = ((OutputHost32 == outSegFunc)
+ || (OutputBig32 == outSegFunc)
+ || (OutputLittle32 == outSegFunc));
+
+ numAddressBits = segmentOptions->fNumAddressBits;
+ maxSegmentSize = segmentOptions->fMaxSegmentSize;
+ maxTransferSize = segmentOptions->fMaxTransferSize;
+ alignment = segmentOptions->fAlignment;
+ if (is32Bit) {
+ if (!numAddressBits) {
+ numAddressBits = 32;
+ } else if (numAddressBits > 32) {
+ return kIOReturnBadArgument; // Wrong output function for bits
+ }
+ }
+
+ if (numAddressBits && (numAddressBits < PAGE_SHIFT)) {
+ return kIOReturnBadArgument;
+ }
+
+ if (!maxSegmentSize) {
+ maxSegmentSize--; // Set Max segment to -1
+ }
+ if (!maxTransferSize) {
+ maxTransferSize--; // Set Max transfer to -1
+ }
+ if (mapper && !OSDynamicCast(IOMapper, mapper)) {
+ device = mapper;
+ mapper = NULL;
+ }
+ if (!mapper && (kUnmapped != MAPTYPE(mappingOptions))) {
+ IOMapper::checkForSystemMapper();
+ mapper = IOMapper::gSystem;
+ }
+
+ fNumSegments = 0;
+ fOutSeg = outSegFunc;
+ fNumAddressBits = numAddressBits;
+ fMaxSegmentSize = maxSegmentSize;
+ fMappingOptions = mappingOptions;
+ fMaxTransferSize = maxTransferSize;
+ if (!alignment) {
+ alignment = 1;
+ }
+ fAlignMask = alignment - 1;
+
+ alignment = segmentOptions->fAlignmentLength;
+ if (!alignment) {
+ alignment = 1;
+ }
+ fAlignMaskLength = alignment - 1;
+
+ alignment = segmentOptions->fAlignmentInternalSegments;
+ if (!alignment) {
+ alignment = (fAlignMask + 1);
+ }
+ fAlignMaskInternalSegments = alignment - 1;
+
+ switch (MAPTYPE(mappingOptions)) {
+ case kMapped: break;
+ case kUnmapped: break;
+ case kNonCoherent: break;
+
+ case kBypassed:
+ if (!mapper) {
+ break;
+ }
+ return kIOReturnBadArgument;
+
+ default:
+ return kIOReturnBadArgument;
+ }
+ ;
+
+ if (mapper != fMapper) {
+ fMapper.reset(mapper, OSRetain);
+ }
+
+ fInternalState->fIterateOnly = (0 != (kIterateOnly & mappingOptions));
+ fInternalState->fDevice = device;
+
+ return kIOReturnSuccess;
}
void
IODMACommand::free()
{
- if (reserved)
- IODelete(reserved, ExpansionData, 1);
+ if (reserved) {
+ IODelete(reserved, IODMACommandInternal, 1);
+ }
- super::free();
+ fMapper.reset();
+
+ // Correct use of this class when setting an IOMemoryDescriptor
+ // in fMemory via setMemoryDescriptor(desc) is, for the caller, to
+ // have a matching call to clearMemoryDescriptor() before releasing
+ // the object. The matching call has also the effect of releasing
+ // the ref taken on the IOMemoryDescriptor in setMemoryDescriptor().
+ //
+ // A number of "misbehaving" drivers has been found during testing,
+ // whereby a matching call to clearMemoryDescriptor() is missing:
+ //
+ // rdar://59947343
+ // rdar://59946968
+ //
+ // Both the approaches taken in said drivers are wrong, but have gone
+ // basically silent with fMemory being a regular pointer. With fMemory
+ // becoming a OSSharedPtr, the IODMACommand destructor expects to find
+ // either fMemory reset (through the call to clearMemoryDescriptor()) or
+ // a reference hold for the release.
+ //
+ // For this reason, this workaround of detaching fMemory is put in
+ // place here, choosing the leak over the panic for misbehaving
+ // drivers. Once all instances are fixed, this workaround will be
+ // removed.
+ //
+ // Note: all well behaving drivers that have matching calls for
+ // setMemoryDescriptor() and clearMemoryDescriptor() are unaffected
+ // since fMemory will be null at this point.
+ fMemory.detach();
+
+ super::free();
}
IOReturn
IODMACommand::setMemoryDescriptor(const IOMemoryDescriptor *mem, bool autoPrepare)
{
- if (mem == fMemory)
- {
- if (!autoPrepare)
- {
- while (fActive)
- complete();
- }
- return kIOReturnSuccess;
- }
+ IOReturn err = kIOReturnSuccess;
- if (fMemory) {
- // As we are almost certainly being called from a work loop thread
- // if fActive is true it is probably not a good time to potentially
- // block. Just test for it and return an error
- if (fActive)
- return kIOReturnBusy;
- clearMemoryDescriptor();
- };
+ if (mem == fMemory) {
+ if (!autoPrepare) {
+ while (fActive) {
+ complete();
+ }
+ }
+ return kIOReturnSuccess;
+ }
- if (mem) {
- bzero(&fMDSummary, sizeof(fMDSummary));
- IOReturn rtn = mem->dmaCommandOperation(
- kIOMDGetCharacteristics,
- &fMDSummary, sizeof(fMDSummary));
- if (rtn)
- return rtn;
+ if (fMemory) {
+ // As we are almost certainly being called from a work loop thread
+ // if fActive is true it is probably not a good time to potentially
+ // block. Just test for it and return an error
+ if (fActive) {
+ return kIOReturnBusy;
+ }
+ clearMemoryDescriptor();
+ }
- ppnum_t highPage = fMDSummary.fHighestPage ? fMDSummary.fHighestPage : gIOLastPage;
+ if (mem) {
+ bzero(&fMDSummary, sizeof(fMDSummary));
+ err = mem->dmaCommandOperation(kIOMDGetCharacteristics | (kMapped == MAPTYPE(fMappingOptions)),
+ &fMDSummary, sizeof(fMDSummary));
+ if (err) {
+ return err;
+ }
- if ((kMapped == MAPTYPE(fMappingOptions))
- && fMapper
- && (!fNumAddressBits || (fNumAddressBits >= 31)))
- // assuming mapped space is 2G
- fInternalState->fCheckAddressing = false;
- else
- fInternalState->fCheckAddressing = (fNumAddressBits && (highPage >= (1UL << (fNumAddressBits - PAGE_SHIFT))));
+ ppnum_t highPage = fMDSummary.fHighestPage ? fMDSummary.fHighestPage : gIOLastPage;
- mem->retain();
- fMemory = mem;
+ if ((kMapped == MAPTYPE(fMappingOptions))
+ && fMapper) {
+ fInternalState->fCheckAddressing = false;
+ } else {
+ fInternalState->fCheckAddressing = (fNumAddressBits && (highPage >= (1UL << (fNumAddressBits - PAGE_SHIFT))));
+ }
- if (autoPrepare)
- return prepare();
- };
+ fInternalState->fNewMD = true;
+ fMemory.reset(const_cast<IOMemoryDescriptor *>(mem), OSRetain);
+ fInternalState->fSetActiveNoMapper = (!fMapper);
+ if (fInternalState->fSetActiveNoMapper) {
+ mem->dmaCommandOperation(kIOMDSetDMAActive, this, 0);
+ }
+ if (autoPrepare) {
+ err = prepare();
+ if (err) {
+ clearMemoryDescriptor();
+ }
+ }
+ }
- return kIOReturnSuccess;
+ return err;
}
IOReturn
IODMACommand::clearMemoryDescriptor(bool autoComplete)
{
- if (fActive && !autoComplete)
- return (kIOReturnNotReady);
+ if (fActive && !autoComplete) {
+ return kIOReturnNotReady;
+ }
- if (fMemory) {
- while (fActive)
- complete();
- fMemory->release();
- fMemory = 0;
- }
+ if (fMemory) {
+ while (fActive) {
+ complete();
+ }
+ if (fInternalState->fSetActiveNoMapper) {
+ fMemory->dmaCommandOperation(kIOMDSetDMAInactive, this, 0);
+ }
+ fMemory.reset();
+ }
- return (kIOReturnSuccess);
+ return kIOReturnSuccess;
}
const IOMemoryDescriptor *
IODMACommand::getMemoryDescriptor() const
{
- return fMemory;
+ return fMemory.get();
}
+IOMemoryDescriptor *
+IODMACommand::getIOMemoryDescriptor() const
+{
+ OSSharedPtr<IOMemoryDescriptor> mem;
+
+ mem = reserved->fCopyMD;
+ if (!mem) {
+ mem = fMemory;
+ }
+
+ return mem.get();
+}
IOReturn
IODMACommand::segmentOp(
- void *reference,
- IODMACommand *target,
- Segment64 segment,
- void *segments,
- UInt32 segmentIndex)
-{
- IOOptionBits op = (IOOptionBits) reference;
- addr64_t maxPhys, address;
- addr64_t remapAddr = 0;
- uint64_t length;
- uint32_t numPages;
-
- IODMACommandInternal * state = target->reserved;
-
- if (target->fNumAddressBits && (target->fNumAddressBits < 64))
- maxPhys = (1ULL << target->fNumAddressBits);
- else
- maxPhys = 0;
- maxPhys--;
-
- address = segment.fIOVMAddr;
- length = segment.fLength;
-
- assert(address);
- assert(length);
-
- if (!state->fMisaligned)
- {
- state->fMisaligned |= (0 != (target->fAlignMask & address));
- if (state->fMisaligned) DEBG("misaligned %qx:%qx, %lx\n", address, length, target->fAlignMask);
- }
-
- if (state->fMisaligned && (kWalkPreflight & op))
- return (kIOReturnNotAligned);
-
- if (!state->fDoubleBuffer)
- {
- if ((address + length - 1) <= maxPhys)
- {
- length = 0;
+ void *reference,
+ IODMACommand *target,
+ Segment64 segment,
+ void *segments,
+ UInt32 segmentIndex)
+{
+ IOOptionBits op = (IOOptionBits)(uintptr_t) reference;
+ addr64_t maxPhys, address;
+ uint64_t length;
+ uint32_t numPages;
+ uint32_t mask;
+
+ IODMACommandInternal * state = target->reserved;
+
+ if (target->fNumAddressBits && (target->fNumAddressBits < 64) && (state->fLocalMapperAllocValid || !target->fMapper)) {
+ maxPhys = (1ULL << target->fNumAddressBits);
+ } else {
+ maxPhys = 0;
}
- else if (address <= maxPhys)
- {
- DEBG("tail %qx, %qx", address, length);
- length = (address + length - maxPhys - 1);
- address = maxPhys + 1;
- DEBG("-> %qx, %qx\n", address, length);
- }
- }
-
- if (!length)
- return (kIOReturnSuccess);
-
- numPages = atop_64(round_page_64(length));
- remapAddr = state->fCopyNext;
-
- if (kWalkPreflight & op)
- {
- state->fCopyPageCount += numPages;
- }
- else
- {
- if (kWalkPrepare & op)
- {
- for (IOItemCount idx = 0; idx < numPages; idx++)
- gIOCopyMapper->iovmInsert(atop_64(remapAddr), idx, atop_64(address) + idx);
+ maxPhys--;
+
+ address = segment.fIOVMAddr;
+ length = segment.fLength;
+
+ assert(length);
+
+ if (!state->fMisaligned) {
+ mask = (segmentIndex ? target->fAlignMaskInternalSegments : state->fSourceAlignMask);
+ state->fMisaligned |= (0 != (mask & address));
+ if (state->fMisaligned) {
+ DEBG("misaligned address %qx:%qx, %x\n", address, length, mask);
+ }
}
- if (state->fDoubleBuffer)
- state->fCopyNext += length;
- else
- {
- state->fCopyNext += round_page(length);
- remapAddr += (address & PAGE_MASK);
+ if (!state->fMisaligned) {
+ mask = target->fAlignMaskLength;
+ state->fMisaligned |= (0 != (mask & length));
+ if (state->fMisaligned) {
+ DEBG("misaligned length %qx:%qx, %x\n", address, length, mask);
+ }
}
- if (SHOULD_COPY_DIR(op, target->fMDSummary.fDirection))
- {
- DEBG("cpv: 0x%qx %s 0x%qx, 0x%qx, 0x%02lx\n", remapAddr,
- (kWalkSyncIn & op) ? "->" : "<-",
- address, length, op);
- if (kWalkSyncIn & op)
- { // cppvNoModSnk
- copypv(remapAddr, address, length,
- cppvPsnk | cppvFsnk | cppvPsrc | cppvNoRefSrc );
- }
- else
- {
- copypv(address, remapAddr, length,
- cppvPsnk | cppvFsnk | cppvPsrc | cppvNoRefSrc );
- }
+ if (state->fMisaligned && (kWalkPreflight & op)) {
+ return kIOReturnNotAligned;
+ }
+
+ if (!state->fDoubleBuffer) {
+ if ((address + length - 1) <= maxPhys) {
+ length = 0;
+ } else if (address <= maxPhys) {
+ DEBG("tail %qx, %qx", address, length);
+ length = (address + length - maxPhys - 1);
+ address = maxPhys + 1;
+ DEBG("-> %qx, %qx\n", address, length);
+ }
+ }
+
+ if (!length) {
+ return kIOReturnSuccess;
+ }
+
+ uint64_t numPages64 = atop_64(round_page_64((address & PAGE_MASK) + length));
+ if (numPages64 > UINT_MAX) {
+ return kIOReturnVMError;
+ }
+ numPages = (typeof(numPages))numPages64;
+
+ if (kWalkPreflight & op) {
+ state->fCopyPageCount += numPages;
+ } else {
+ vm_page_t lastPage;
+ lastPage = NULL;
+ if (kWalkPrepare & op) {
+ lastPage = state->fCopyNext;
+ for (IOItemCount idx = 0; idx < numPages; idx++) {
+ vm_page_set_offset(lastPage, atop_64(address) + idx);
+ lastPage = vm_page_get_next(lastPage);
+ }
+ }
+
+ if (!lastPage || SHOULD_COPY_DIR(op, target->fMDSummary.fDirection)) {
+ lastPage = state->fCopyNext;
+ for (IOItemCount idx = 0; idx < numPages; idx++) {
+ if (SHOULD_COPY_DIR(op, target->fMDSummary.fDirection)) {
+ addr64_t cpuAddr = address;
+ addr64_t remapAddr;
+ uint64_t chunk;
+
+ if ((kMapped == MAPTYPE(target->fMappingOptions))
+ && target->fMapper) {
+ cpuAddr = target->fMapper->mapToPhysicalAddress(address);
+ }
+
+ remapAddr = ptoa_64(vm_page_get_phys_page(lastPage));
+ if (!state->fDoubleBuffer) {
+ remapAddr += (address & PAGE_MASK);
+ }
+ chunk = PAGE_SIZE - (address & PAGE_MASK);
+ if (chunk > length) {
+ chunk = length;
+ }
+ if (chunk > (UINT_MAX - PAGE_SIZE + 1)) {
+ chunk = (UINT_MAX - PAGE_SIZE + 1);
+ }
+
+ DEBG("cpv: 0x%qx %s 0x%qx, 0x%qx, 0x%02lx\n", remapAddr,
+ (kWalkSyncIn & op) ? "->" : "<-",
+ address, chunk, op);
+
+ if (kWalkSyncIn & op) { // cppvNoModSnk
+ copypv(remapAddr, cpuAddr, (unsigned int) chunk,
+ cppvPsnk | cppvFsnk | cppvPsrc | cppvNoRefSrc );
+ } else {
+ copypv(cpuAddr, remapAddr, (unsigned int) chunk,
+ cppvPsnk | cppvFsnk | cppvPsrc | cppvNoRefSrc );
+ }
+ address += chunk;
+ length -= chunk;
+ }
+ lastPage = vm_page_get_next(lastPage);
+ }
+ }
+ state->fCopyNext = lastPage;
}
- }
- return kIOReturnSuccess;
+ return kIOReturnSuccess;
+}
+
+OSSharedPtr<IOBufferMemoryDescriptor>
+IODMACommand::createCopyBuffer(IODirection direction, UInt64 length)
+{
+ mach_vm_address_t mask = 0xFFFFF000; //state->fSourceAlignMask
+ return IOBufferMemoryDescriptor::inTaskWithPhysicalMask(kernel_task,
+ direction, length, mask);
}
IOReturn
-IODMACommand::walkAll(UInt8 op)
-{
- IODMACommandInternal * state = fInternalState;
-
- IOReturn ret = kIOReturnSuccess;
- UInt32 numSegments;
- UInt64 offset;
-
- if (gIOEnableCopyMapper && (kWalkPreflight & op))
- {
- state->fCopyContig = false;
- state->fMisaligned = false;
- state->fDoubleBuffer = false;
- state->fPrepared = false;
- state->fCopyNext = 0;
- state->fCopyPageAlloc = 0;
- state->fCopyPageCount = 0;
- state->fCopyMD = 0;
-
- if (!(kWalkDoubleBuffer & op))
- {
- offset = 0;
- numSegments = 0-1;
- ret = genIOVMSegments(segmentOp, (void *) op, &offset, state, &numSegments);
+IODMACommand::walkAll(uint32_t op)
+{
+ IODMACommandInternal * state = fInternalState;
+
+ IOReturn ret = kIOReturnSuccess;
+ UInt32 numSegments;
+ UInt64 offset;
+
+ if (kWalkPreflight & op) {
+ state->fMisaligned = false;
+ state->fDoubleBuffer = false;
+ state->fPrepared = false;
+ state->fCopyNext = NULL;
+ state->fCopyPageAlloc = NULL;
+ state->fCopyPageCount = 0;
+ state->fNextRemapPage = NULL;
+ state->fCopyMD = NULL;
+
+ if (!(kWalkDoubleBuffer & op)) {
+ offset = 0;
+ numSegments = 0 - 1;
+ ret = genIOVMSegments(op, segmentOp, (void *)(uintptr_t) op, &offset, state, &numSegments);
+ }
+
+ op &= ~kWalkPreflight;
+
+ state->fDoubleBuffer = (state->fMisaligned || state->fForceDoubleBuffer);
+ state->fForceDoubleBuffer = false;
+ if (state->fDoubleBuffer) {
+ state->fCopyPageCount = (typeof(state->fCopyPageCount))(atop_64(round_page(state->fPreparedLength)));
+ }
+
+ if (state->fCopyPageCount) {
+ vm_page_t mapBase = NULL;
+
+ DEBG("preflight fCopyPageCount %d\n", state->fCopyPageCount);
+
+ if (!fMapper && !state->fDoubleBuffer) {
+ kern_return_t kr;
+
+ if (fMapper) {
+ panic("fMapper copying");
+ }
+
+ kr = vm_page_alloc_list(state->fCopyPageCount,
+ KMA_LOMEM | KMA_NOPAGEWAIT, &mapBase);
+ if (KERN_SUCCESS != kr) {
+ DEBG("vm_page_alloc_list(%d) failed (%d)\n", state->fCopyPageCount, kr);
+ mapBase = NULL;
+ }
+ }
+
+ if (mapBase) {
+ state->fCopyPageAlloc = mapBase;
+ state->fCopyNext = state->fCopyPageAlloc;
+ offset = 0;
+ numSegments = 0 - 1;
+ ret = genIOVMSegments(op, segmentOp, (void *)(uintptr_t) op, &offset, state, &numSegments);
+ state->fPrepared = true;
+ op &= ~(kWalkSyncIn | kWalkSyncOut);
+ } else {
+ DEBG("alloc IOBMD\n");
+ state->fCopyMD = createCopyBuffer(fMDSummary.fDirection, state->fPreparedLength);
+
+ if (state->fCopyMD) {
+ ret = kIOReturnSuccess;
+ state->fPrepared = true;
+ } else {
+ DEBG("IODMACommand !alloc IOBMD");
+ return kIOReturnNoResources;
+ }
+ }
+ }
}
- op &= ~kWalkPreflight;
+ if (state->fPrepared && ((kWalkSyncIn | kWalkSyncOut) & op)) {
+ if (state->fCopyPageCount) {
+ DEBG("sync fCopyPageCount %d\n", state->fCopyPageCount);
- state->fDoubleBuffer = (state->fMisaligned || (kWalkDoubleBuffer & op));
- if (state->fDoubleBuffer)
- state->fCopyPageCount = atop_64(round_page(state->fPreparedLength));
+ if (state->fCopyPageAlloc) {
+ state->fCopyNext = state->fCopyPageAlloc;
+ offset = 0;
+ numSegments = 0 - 1;
+ ret = genIOVMSegments(op, segmentOp, (void *)(uintptr_t) op, &offset, state, &numSegments);
+ } else if (state->fCopyMD) {
+ DEBG("sync IOBMD\n");
- if (state->fCopyPageCount)
- {
- IOMapper * mapper;
- ppnum_t mapBase = 0;
-
- DEBG("preflight fCopyPageCount %d\n", state->fCopyPageCount);
-
- mapper = gIOCopyMapper;
- if (mapper)
- mapBase = mapper->iovmAlloc(state->fCopyPageCount);
- if (mapBase)
- {
- state->fCopyPageAlloc = mapBase;
- if (state->fCopyPageAlloc && state->fDoubleBuffer)
- {
- DEBG("contig copy map\n");
- state->fCopyContig = true;
- }
-
- state->fCopyNext = ptoa_64(state->fCopyPageAlloc);
- offset = 0;
- numSegments = 0-1;
- ret = genIOVMSegments(segmentOp, (void *) op, &offset, state, &numSegments);
- state->fPrepared = true;
- op &= ~(kWalkSyncIn | kWalkSyncOut);
- }
- else
- {
- DEBG("alloc IOBMD\n");
- state->fCopyMD = IOBufferMemoryDescriptor::withOptions(
- fMDSummary.fDirection, state->fPreparedLength, page_size);
-
- if (state->fCopyMD)
- {
- ret = kIOReturnSuccess;
- state->fPrepared = true;
- }
- else
- {
- DEBG("IODMACommand !iovmAlloc");
- return (kIOReturnNoResources);
- }
- }
- }
- }
-
- if (gIOEnableCopyMapper && state->fPrepared && ((kWalkSyncIn | kWalkSyncOut) & op))
- {
- if (state->fCopyPageCount)
- {
- DEBG("sync fCopyPageCount %d\n", state->fCopyPageCount);
-
- if (state->fCopyPageAlloc)
- {
- state->fCopyNext = ptoa_64(state->fCopyPageAlloc);
- offset = 0;
- numSegments = 0-1;
- ret = genIOVMSegments(segmentOp, (void *) op, &offset, state, &numSegments);
- }
- else if (state->fCopyMD)
- {
- DEBG("sync IOBMD\n");
-
- if (SHOULD_COPY_DIR(op, fMDSummary.fDirection))
- {
- IOMemoryDescriptor *poMD = const_cast<IOMemoryDescriptor *>(fMemory);
-
- IOByteCount bytes;
-
- if (kWalkSyncIn & op)
- bytes = poMD->writeBytes(state->fPreparedOffset,
+ if (SHOULD_COPY_DIR(op, fMDSummary.fDirection)) {
+ OSSharedPtr<IOMemoryDescriptor> poMD = fMemory;
+
+ IOByteCount bytes;
+
+ if (kWalkSyncIn & op) {
+ bytes = poMD->writeBytes(state->fPreparedOffset,
state->fCopyMD->getBytesNoCopy(),
state->fPreparedLength);
- else
- bytes = poMD->readBytes(state->fPreparedOffset,
+ } else {
+ bytes = poMD->readBytes(state->fPreparedOffset,
state->fCopyMD->getBytesNoCopy(),
state->fPreparedLength);
- DEBG("fCopyMD %s %lx bytes\n", (kWalkSyncIn & op) ? "wrote" : "read", bytes);
- ret = (bytes == state->fPreparedLength) ? kIOReturnSuccess : kIOReturnUnderrun;
+ }
+ DEBG("fCopyMD %s %lx bytes\n", (kWalkSyncIn & op) ? "wrote" : "read", bytes);
+ ret = (bytes == state->fPreparedLength) ? kIOReturnSuccess : kIOReturnUnderrun;
+ } else {
+ ret = kIOReturnSuccess;
+ }
+ }
}
- else
- ret = kIOReturnSuccess;
- }
}
- }
- if (kWalkComplete & op)
- {
- if (state->fCopyPageAlloc)
- {
- gIOCopyMapper->iovmFree(state->fCopyPageAlloc, state->fCopyPageCount);
- state->fCopyPageAlloc = 0;
- state->fCopyPageCount = 0;
+ if (kWalkComplete & op) {
+ if (state->fCopyPageAlloc) {
+ vm_page_free_list(state->fCopyPageAlloc, FALSE);
+ state->fCopyPageAlloc = NULL;
+ state->fCopyPageCount = 0;
+ }
+ if (state->fCopyMD) {
+ state->fCopyMD.reset();
+ }
+
+ state->fPrepared = false;
}
- if (state->fCopyMD)
- {
- state->fCopyMD->release();
- state->fCopyMD = 0;
+ return ret;
+}
+
+UInt8
+IODMACommand::getNumAddressBits(void)
+{
+ return (UInt8) fNumAddressBits;
+}
+
+UInt32
+IODMACommand::getAlignment(void)
+{
+ return fAlignMask + 1;
+}
+
+uint32_t
+IODMACommand::getAlignmentLength(void)
+{
+ return fAlignMaskLength + 1;
+}
+
+uint32_t
+IODMACommand::getAlignmentInternalSegments(void)
+{
+ return fAlignMaskInternalSegments + 1;
+}
+
+IOReturn
+IODMACommand::prepareWithSpecification(SegmentFunction outSegFunc,
+ const SegmentOptions * segmentOptions,
+ uint32_t mappingOptions,
+ IOMapper * mapper,
+ UInt64 offset,
+ UInt64 length,
+ bool flushCache,
+ bool synchronize)
+{
+ IOReturn ret;
+
+ if (fActive) {
+ return kIOReturnNotPermitted;
+ }
+
+ ret = setSpecification(outSegFunc, segmentOptions, mappingOptions, mapper);
+ if (kIOReturnSuccess != ret) {
+ return ret;
}
- state->fPrepared = false;
- }
- return (ret);
+ ret = prepare(offset, length, flushCache, synchronize);
+
+ return ret;
+}
+
+IOReturn
+IODMACommand::prepareWithSpecification(SegmentFunction outSegFunc,
+ UInt8 numAddressBits,
+ UInt64 maxSegmentSize,
+ MappingOptions mappingOptions,
+ UInt64 maxTransferSize,
+ UInt32 alignment,
+ IOMapper *mapper,
+ UInt64 offset,
+ UInt64 length,
+ bool flushCache,
+ bool synchronize)
+{
+ SegmentOptions segmentOptions =
+ {
+ .fStructSize = sizeof(segmentOptions),
+ .fNumAddressBits = numAddressBits,
+ .fMaxSegmentSize = maxSegmentSize,
+ .fMaxTransferSize = maxTransferSize,
+ .fAlignment = alignment,
+ .fAlignmentLength = 1,
+ .fAlignmentInternalSegments = alignment
+ };
+
+ return prepareWithSpecification(outSegFunc, &segmentOptions, mappingOptions, mapper,
+ offset, length, flushCache, synchronize);
}
-IOReturn
+
+IOReturn
IODMACommand::prepare(UInt64 offset, UInt64 length, bool flushCache, bool synchronize)
{
- IODMACommandInternal * state = fInternalState;
- IOReturn ret = kIOReturnSuccess;
+ IODMACommandInternal * state = fInternalState;
+ IOReturn ret = kIOReturnSuccess;
+ uint32_t mappingOptions = fMappingOptions;
- if (!length)
- length = fMDSummary.fLength;
+ // check specification has been set
+ if (!fOutSeg) {
+ return kIOReturnNotReady;
+ }
- if (length > fMaxTransferSize)
- return kIOReturnNoSpace;
+ if (!length) {
+ length = fMDSummary.fLength;
+ }
-#if 0
- if (IS_NONCOHERENT(mappingOptions) && flushCache) {
- IOMemoryDescriptor *poMD = const_cast<IOMemoryDescriptor *>(fMemory);
+ if (length > fMaxTransferSize) {
+ return kIOReturnNoSpace;
+ }
- poMD->performOperation(kIOMemoryIncoherentIOStore, 0, fMDSummary.fLength);
- }
-#endif
- if (fActive++)
- {
- if ((state->fPreparedOffset != offset)
- || (state->fPreparedLength != length))
- ret = kIOReturnNotReady;
- }
- else
- {
- state->fPreparedOffset = offset;
- state->fPreparedLength = length;
-
- state->fCopyContig = false;
- state->fMisaligned = false;
- state->fDoubleBuffer = false;
- state->fPrepared = false;
- state->fCopyNext = 0;
- state->fCopyPageAlloc = 0;
- state->fCopyPageCount = 0;
- state->fCopyMD = 0;
-
- state->fCursor = state->fIterateOnly
- || (!state->fCheckAddressing
- && (!fAlignMask
- || ((fMDSummary.fPageAlign & (1 << 31)) && (0 == (fMDSummary.fPageAlign & fAlignMask)))));
- if (!state->fCursor)
- {
- IOOptionBits op = kWalkPrepare | kWalkPreflight;
- if (synchronize)
- op |= kWalkSyncOut;
- ret = walkAll(op);
+ if (fActive++) {
+ if ((state->fPreparedOffset != offset)
+ || (state->fPreparedLength != length)) {
+ ret = kIOReturnNotReady;
+ }
+ } else {
+ if (fAlignMaskLength & length) {
+ return kIOReturnNotAligned;
+ }
+
+ if (atop_64(state->fPreparedLength) > UINT_MAX) {
+ return kIOReturnVMError;
+ }
+ state->fPreparedOffset = offset;
+ state->fPreparedLength = length;
+
+ state->fMisaligned = false;
+ state->fDoubleBuffer = false;
+ state->fPrepared = false;
+ state->fCopyNext = NULL;
+ state->fCopyPageAlloc = NULL;
+ state->fCopyPageCount = 0;
+ state->fNextRemapPage = NULL;
+ state->fCopyMD = NULL;
+ state->fLocalMapperAlloc = 0;
+ state->fLocalMapperAllocValid = false;
+ state->fLocalMapperAllocLength = 0;
+
+ state->fSourceAlignMask = fAlignMask;
+ if (fMapper) {
+ state->fSourceAlignMask &= page_mask;
+ }
+
+ state->fCursor = state->fIterateOnly
+ || (!state->fCheckAddressing
+ && (!state->fSourceAlignMask
+ || ((fMDSummary.fPageAlign & (1 << 31)) && (0 == (fMDSummary.fPageAlign & state->fSourceAlignMask)))));
+
+ if (!state->fCursor) {
+ IOOptionBits op = kWalkPrepare | kWalkPreflight;
+ if (synchronize) {
+ op |= kWalkSyncOut;
+ }
+ ret = walkAll(op);
+ }
+
+ if (IS_NONCOHERENT(mappingOptions) && flushCache) {
+ if (state->fCopyMD) {
+ state->fCopyMD->performOperation(kIOMemoryIncoherentIOStore, 0, length);
+ } else {
+ fMemory->performOperation(kIOMemoryIncoherentIOStore, offset, length);
+ }
+ }
+
+ if (fMapper) {
+ IOMDDMAMapArgs mapArgs;
+ bzero(&mapArgs, sizeof(mapArgs));
+ mapArgs.fMapper = fMapper.get();
+ mapArgs.fCommand = this;
+ mapArgs.fMapSpec.device = state->fDevice;
+ mapArgs.fMapSpec.alignment = fAlignMask + 1;
+ mapArgs.fMapSpec.numAddressBits = fNumAddressBits ? ((UInt8) fNumAddressBits) : 64;
+ mapArgs.fLength = state->fPreparedLength;
+ OSSharedPtr<IOMemoryDescriptor> md = state->fCopyMD;
+ if (md) {
+ mapArgs.fOffset = 0;
+ } else {
+ md = fMemory;
+ mapArgs.fOffset = state->fPreparedOffset;
+ }
+
+ ret = md->dmaCommandOperation(kIOMDDMAMap, &mapArgs, sizeof(mapArgs));
+
+ if ((kIOReturnSuccess == ret)
+ && mapArgs.fAllocLength
+ && (mapArgs.fAllocLength != mapArgs.fLength)) {
+ do {
+ // multisegment case
+ IOMDDMAWalkSegmentState walkState;
+ IOMDDMAWalkSegmentArgs * walkArgs = (IOMDDMAWalkSegmentArgs *) (void *)&walkState;
+ IOOptionBits mdOp;
+ uint64_t index;
+ IOPhysicalLength segLen;
+ uint32_t segCount;
+ uint64_t phys, align;
+ uint64_t mapperPageMask;
+ uint64_t mapperPageShift;
+ uint64_t insertOffset;
+ uint32_t mapOptions;
+ uint64_t length;
+
+ assert(mapArgs.fAllocLength > mapArgs.fLength);
+
+ mapperPageMask = fMapper->getPageSize();
+ assert(mapperPageMask);
+ mapperPageMask -= 1;
+ mapperPageShift = (64 - __builtin_clzll(mapperPageMask));
+ walkArgs->fMapped = false;
+ length = state->fPreparedLength;
+ mdOp = kIOMDFirstSegment;
+ segCount = 0;
+ for (index = 0; index < length; segCount++) {
+ walkArgs->fOffset = state->fPreparedOffset + index;
+
+ ret = md->dmaCommandOperation(mdOp, &walkState, sizeof(walkState));
+ mdOp = kIOMDWalkSegments;
+ assert(kIOReturnSuccess == ret);
+ if (ret != kIOReturnSuccess) {
+ panic("dmaCommandOperation");
+ }
+ segLen = walkArgs->fLength;
+ index += segLen;
+ }
+ if (ret != kIOReturnSuccess) {
+ break;
+ }
+
+#if defined(LOGTAG)
+ if (LOGTAG == fMemory->getTag()) {
+ IOLog("DMA[%p] alloc 0x%qx, 0x%qx\n", this, mapArgs.fAlloc, mapArgs.fAllocLength);
+ }
+#endif /* defined(LOGTAG) */
+
+ state->fMapSegments = IONewZero(IODMACommandMapSegment, segCount);
+ if (!state->fMapSegments) {
+ ret = kIOReturnNoMemory;
+ break;
+ }
+ state->fMapSegmentsCount = segCount;
+
+ switch (kIODirectionOutIn & fMDSummary.fDirection) {
+ case kIODirectionOut:
+ mapOptions = kIODMAMapReadAccess;
+ break;
+ case kIODirectionIn:
+ mapOptions = kIODMAMapWriteAccess;
+ break;
+ default:
+ mapOptions = kIODMAMapReadAccess | kIODMAMapWriteAccess;
+ break;
+ }
+
+ mdOp = kIOMDFirstSegment;
+ segCount = 0;
+ for (insertOffset = 0, index = 0; index < length; segCount++) {
+ walkArgs->fOffset = state->fPreparedOffset + index;
+ ret = md->dmaCommandOperation(mdOp, &walkState, sizeof(walkState));
+ mdOp = kIOMDWalkSegments;
+ if (ret != kIOReturnSuccess) {
+ panic("dmaCommandOperation 0x%x", ret);
+ }
+ phys = walkArgs->fIOVMAddr;
+ segLen = walkArgs->fLength;
+
+#if defined(LOGTAG)
+ if (LOGTAG == fMemory->getTag()) {
+ IOLog("DMA[%p] phys[%d] 0x%qx, 0x%qx\n", this, segCount, (uint64_t) phys, (uint64_t) segLen);
+ }
+#endif /* defined(LOGTAG) */
+
+ align = (phys & mapperPageMask);
+
+#if defined(LOGTAG)
+ if (LOGTAG == fMemory->getTag()) {
+ IOLog("DMA[%p] runs[%d] dmaoff 0x%qx, mapoff 0x%qx, align 0x%qx\n", this, segCount, index, insertOffset, align);
+ }
+#endif /* defined(LOGTAG) */
+
+ assert(segCount < state->fMapSegmentsCount);
+ state->fMapSegments[segCount].fDMAOffset = state->fPreparedOffset + index;
+ state->fMapSegments[segCount].fMapOffset = insertOffset;
+ state->fMapSegments[segCount].fPageOffset = align;
+ index += segLen;
+
+ // segment page align
+ segLen = ((phys + segLen + mapperPageMask) & ~mapperPageMask);
+ phys -= align;
+ segLen -= phys;
+ insertOffset += segLen;
+ }
+ state->fLocalMapperAllocBase = (mapArgs.fAlloc & ~mapperPageMask);
+#if defined(LOGTAG)
+ if (LOGTAG == fMemory->getTag()) {
+ IOLog("IODMACommand fMapSegmentsCount %d\n", state->fMapSegmentsCount);
+ }
+#endif /* defined(LOGTAG) */
+ } while (false);
+ }
+ if (kIOReturnSuccess == ret) {
+ state->fLocalMapperAlloc = mapArgs.fAlloc;
+ state->fLocalMapperAllocValid = true;
+ state->fLocalMapperAllocLength = mapArgs.fAllocLength;
+ }
+ }
+ if (kIOReturnSuccess == ret) {
+ state->fPrepared = true;
+ }
}
- if (kIOReturnSuccess == ret)
- state->fPrepared = true;
- }
- return ret;
+ return ret;
}
-IOReturn
+IOReturn
IODMACommand::complete(bool invalidateCache, bool synchronize)
{
- IODMACommandInternal * state = fInternalState;
- IOReturn ret = kIOReturnSuccess;
+ IODMACommandInternal * state = fInternalState;
+ IOReturn ret = kIOReturnSuccess;
+ OSSharedPtr<IOMemoryDescriptor> copyMD;
- if (fActive < 1)
- return kIOReturnNotReady;
+ if (fActive < 1) {
+ return kIOReturnNotReady;
+ }
- if (!--fActive)
- {
- if (!state->fCursor)
- {
- IOOptionBits op = kWalkComplete;
- if (synchronize)
- op |= kWalkSyncIn;
- ret = walkAll(op);
+ if (!--fActive) {
+ copyMD = state->fCopyMD;
+
+ if (IS_NONCOHERENT(fMappingOptions) && invalidateCache) {
+ if (copyMD) {
+ copyMD->performOperation(kIOMemoryIncoherentIOFlush, 0, state->fPreparedLength);
+ } else {
+ OSSharedPtr<IOMemoryDescriptor> md = fMemory;
+ md->performOperation(kIOMemoryIncoherentIOFlush, state->fPreparedOffset, state->fPreparedLength);
+ }
+ }
+
+ if (!state->fCursor) {
+ IOOptionBits op = kWalkComplete;
+ if (synchronize) {
+ op |= kWalkSyncIn;
+ }
+ ret = walkAll(op);
+ }
+
+ if (state->fLocalMapperAllocValid) {
+ IOMDDMAMapArgs mapArgs;
+ bzero(&mapArgs, sizeof(mapArgs));
+ mapArgs.fMapper = fMapper.get();
+ mapArgs.fCommand = this;
+ mapArgs.fAlloc = state->fLocalMapperAlloc;
+ mapArgs.fAllocLength = state->fLocalMapperAllocLength;
+ OSSharedPtr<IOMemoryDescriptor> md = copyMD;
+ if (md) {
+ mapArgs.fOffset = 0;
+ } else {
+ md = fMemory;
+ mapArgs.fOffset = state->fPreparedOffset;
+ }
+
+ ret = md->dmaCommandOperation(kIOMDDMAUnmap, &mapArgs, sizeof(mapArgs));
+
+ state->fLocalMapperAlloc = 0;
+ state->fLocalMapperAllocValid = false;
+ state->fLocalMapperAllocLength = 0;
+ if (state->fMapSegments) {
+ IODelete(state->fMapSegments, IODMACommandMapSegment, state->fMapSegmentsCount);
+ state->fMapSegments = NULL;
+ state->fMapSegmentsCount = 0;
+ }
+ }
+
+ state->fPrepared = false;
}
- state->fPrepared = false;
-#if 0
- if (IS_NONCOHERENT(fMappingOptions) && invalidateCache)
- {
- // XXX gvdl: need invalidate before Chardonnay ships
- IOMemoryDescriptor *poMD = const_cast<IOMemoryDescriptor *>(fMemory);
+ return ret;
+}
+
+IOReturn
+IODMACommand::getPreparedOffsetAndLength(UInt64 * offset, UInt64 * length)
+{
+ IODMACommandInternal * state = fInternalState;
+ if (fActive < 1) {
+ return kIOReturnNotReady;
+ }
- poMD->performOperation(kIOMemoryIncoherentIOInvalidate, 0, fMDSummary.fLength);
+ if (offset) {
+ *offset = state->fPreparedOffset;
+ }
+ if (length) {
+ *length = state->fPreparedLength;
}
-#endif
- }
- return ret;
+ return kIOReturnSuccess;
}
IOReturn
IODMACommand::synchronize(IOOptionBits options)
{
- IODMACommandInternal * state = fInternalState;
- IOReturn ret = kIOReturnSuccess;
- IOOptionBits op;
-
- if (kIODirectionOutIn == (kIODirectionOutIn & options))
- return kIOReturnBadArgument;
-
- if (fActive < 1)
- return kIOReturnNotReady;
-
- op = 0;
- if (kForceDoubleBuffer & options)
- {
- if (state->fDoubleBuffer)
- return kIOReturnSuccess;
- if (state->fCursor)
- state->fCursor = false;
- else
- ret = walkAll(kWalkComplete);
-
- op |= kWalkPrepare | kWalkPreflight | kWalkDoubleBuffer;
- }
- else if (state->fCursor)
- return kIOReturnSuccess;
+ IODMACommandInternal * state = fInternalState;
+ IOReturn ret = kIOReturnSuccess;
+ IOOptionBits op;
+
+ if (kIODirectionOutIn == (kIODirectionOutIn & options)) {
+ return kIOReturnBadArgument;
+ }
+
+ if (fActive < 1) {
+ return kIOReturnNotReady;
+ }
- if (kIODirectionIn & options)
- op |= kWalkSyncIn | kWalkSyncAlways;
- else if (kIODirectionOut & options)
- op |= kWalkSyncOut | kWalkSyncAlways;
+ op = 0;
+ if (kForceDoubleBuffer & options) {
+ if (state->fDoubleBuffer) {
+ return kIOReturnSuccess;
+ }
+ ret = complete(false /* invalidateCache */, true /* synchronize */);
+ state->fCursor = false;
+ state->fForceDoubleBuffer = true;
+ ret = prepare(state->fPreparedOffset, state->fPreparedLength, false /* flushCache */, true /* synchronize */);
+
+ return ret;
+ } else if (state->fCursor) {
+ return kIOReturnSuccess;
+ }
+
+ if (kIODirectionIn & options) {
+ op |= kWalkSyncIn | kWalkSyncAlways;
+ } else if (kIODirectionOut & options) {
+ op |= kWalkSyncOut | kWalkSyncAlways;
+ }
- ret = walkAll(op);
+ ret = walkAll(op);
- return ret;
+ return ret;
+}
+
+struct IODMACommandTransferContext {
+ void * buffer;
+ UInt64 bufferOffset;
+ UInt64 remaining;
+ UInt32 op;
+};
+enum{
+ kIODMACommandTransferOpReadBytes = 1,
+ kIODMACommandTransferOpWriteBytes = 2
+};
+
+IOReturn
+IODMACommand::transferSegment(void *reference,
+ IODMACommand *target,
+ Segment64 segment,
+ void *segments,
+ UInt32 segmentIndex)
+{
+ IODMACommandTransferContext * context = (IODMACommandTransferContext *) reference;
+ UInt64 length = min(segment.fLength, context->remaining);
+ addr64_t ioAddr = segment.fIOVMAddr;
+ addr64_t cpuAddr = ioAddr;
+
+ context->remaining -= length;
+
+ while (length) {
+ UInt64 copyLen = length;
+ if ((kMapped == MAPTYPE(target->fMappingOptions))
+ && target->fMapper) {
+ cpuAddr = target->fMapper->mapToPhysicalAddress(ioAddr);
+ copyLen = min(copyLen, page_size - (ioAddr & (page_size - 1)));
+ ioAddr += copyLen;
+ }
+ if (copyLen > (UINT_MAX - PAGE_SIZE + 1)) {
+ copyLen = (UINT_MAX - PAGE_SIZE + 1);
+ }
+
+ switch (context->op) {
+ case kIODMACommandTransferOpReadBytes:
+ copypv(cpuAddr, context->bufferOffset + (addr64_t) context->buffer, (unsigned int) copyLen,
+ cppvPsrc | cppvNoRefSrc | cppvFsnk | cppvKmap);
+ break;
+ case kIODMACommandTransferOpWriteBytes:
+ copypv(context->bufferOffset + (addr64_t) context->buffer, cpuAddr, (unsigned int) copyLen,
+ cppvPsnk | cppvFsnk | cppvNoRefSrc | cppvNoModSnk | cppvKmap);
+ break;
+ }
+ length -= copyLen;
+ context->bufferOffset += copyLen;
+ }
+
+ return context->remaining ? kIOReturnSuccess : kIOReturnOverrun;
+}
+
+UInt64
+IODMACommand::transfer(IOOptionBits transferOp, UInt64 offset, void * buffer, UInt64 length)
+{
+ IODMACommandInternal * state = fInternalState;
+ IODMACommandTransferContext context;
+ Segment64 segments[1];
+ UInt32 numSegments = 0 - 1;
+
+ if (fActive < 1) {
+ return 0;
+ }
+
+ if (offset >= state->fPreparedLength) {
+ return 0;
+ }
+ length = min(length, state->fPreparedLength - offset);
+
+ context.buffer = buffer;
+ context.bufferOffset = 0;
+ context.remaining = length;
+ context.op = transferOp;
+ (void) genIOVMSegments(kWalkClient, transferSegment, &context, &offset, &segments[0], &numSegments);
+
+ return length - context.remaining;
+}
+
+UInt64
+IODMACommand::readBytes(UInt64 offset, void *bytes, UInt64 length)
+{
+ return transfer(kIODMACommandTransferOpReadBytes, offset, bytes, length);
+}
+
+UInt64
+IODMACommand::writeBytes(UInt64 offset, const void *bytes, UInt64 length)
+{
+ return transfer(kIODMACommandTransferOpWriteBytes, offset, const_cast<void *>(bytes), length);
}
IOReturn
IODMACommand::genIOVMSegments(UInt64 *offsetP,
- void *segmentsP,
- UInt32 *numSegmentsP)
+ void *segmentsP,
+ UInt32 *numSegmentsP)
{
- return (genIOVMSegments(clientOutputSegment, (void *) kWalkClient, offsetP, segmentsP, numSegmentsP));
+ return genIOVMSegments(kWalkClient, clientOutputSegment, (void *) fOutSeg,
+ offsetP, segmentsP, numSegmentsP);
}
IOReturn
-IODMACommand::genIOVMSegments(InternalSegmentFunction outSegFunc,
- void *reference,
- UInt64 *offsetP,
- void *segmentsP,
- UInt32 *numSegmentsP)
-{
- IOOptionBits op = (IOOptionBits) reference;
- IODMACommandInternal * internalState = fInternalState;
- IOOptionBits mdOp = kIOMDWalkSegments;
- IOReturn ret = kIOReturnSuccess;
-
- if (!(kWalkComplete & op) && !fActive)
- return kIOReturnNotReady;
-
- if (!offsetP || !segmentsP || !numSegmentsP || !*numSegmentsP)
- return kIOReturnBadArgument;
-
- IOMDDMAWalkSegmentArgs *state =
- (IOMDDMAWalkSegmentArgs *) fState;
-
- UInt64 offset = *offsetP + internalState->fPreparedOffset;
- UInt64 memLength = internalState->fPreparedOffset + internalState->fPreparedLength;
-
- if (offset >= memLength)
- return kIOReturnOverrun;
-
- if (!offset || offset != state->fOffset) {
- state->fOffset = 0;
- state->fIOVMAddr = 0;
- state->fMapped = (IS_MAPPED(fMappingOptions) && fMapper);
- mdOp = kIOMDFirstSegment;
- };
-
- UInt64 bypassMask = fBypassMask;
- UInt32 segIndex = 0;
- UInt32 numSegments = *numSegmentsP;
- Segment64 curSeg = { 0, 0 };
- addr64_t maxPhys;
-
- if (fNumAddressBits && (fNumAddressBits < 64))
- maxPhys = (1ULL << fNumAddressBits);
- else
- maxPhys = 0;
- maxPhys--;
-
- while ((state->fIOVMAddr) || state->fOffset < memLength)
- {
- if (!state->fIOVMAddr) {
-
- IOReturn rtn;
-
- state->fOffset = offset;
- state->fLength = memLength - offset;
-
- if (internalState->fCopyContig && (kWalkClient & op))
- {
- state->fIOVMAddr = ptoa_64(internalState->fCopyPageAlloc)
- + offset - internalState->fPreparedOffset;
- rtn = kIOReturnSuccess;
- }
- else
- {
- const IOMemoryDescriptor * memory =
- internalState->fCopyMD ? internalState->fCopyMD : fMemory;
- rtn = memory->dmaCommandOperation(mdOp, fState, sizeof(fState));
- mdOp = kIOMDWalkSegments;
- }
-
- if (rtn == kIOReturnSuccess) {
- assert(state->fIOVMAddr);
- assert(state->fLength);
- }
- else if (rtn == kIOReturnOverrun)
- state->fIOVMAddr = state->fLength = 0; // At end
- else
- return rtn;
- };
-
- if (!curSeg.fIOVMAddr) {
- UInt64 length = state->fLength;
-
- offset += length;
- curSeg.fIOVMAddr = state->fIOVMAddr | bypassMask;
- curSeg.fLength = length;
- state->fIOVMAddr = 0;
- }
- else if ((curSeg.fIOVMAddr + curSeg.fLength == state->fIOVMAddr)) {
- UInt64 length = state->fLength;
- offset += length;
- curSeg.fLength += length;
- state->fIOVMAddr = 0;
- };
-
-
- if (!state->fIOVMAddr)
- {
- if (kWalkClient & op)
- {
- if ((curSeg.fIOVMAddr + curSeg.fLength - 1) > maxPhys)
- {
- if (internalState->fCursor)
- {
- curSeg.fIOVMAddr = 0;
- ret = kIOReturnMessageTooLarge;
- break;
- }
- else if (curSeg.fIOVMAddr <= maxPhys)
- {
- UInt64 remain, newLength;
-
- newLength = (maxPhys + 1 - curSeg.fIOVMAddr);
- DEBG("trunc %qx, %qx-> %qx\n", curSeg.fIOVMAddr, curSeg.fLength, newLength);
- remain = curSeg.fLength - newLength;
- state->fIOVMAddr = newLength + curSeg.fIOVMAddr;
- curSeg.fLength = newLength;
- state->fLength = remain;
- offset -= remain;
- }
- else if (gIOCopyMapper)
- {
- DEBG("sparse switch %qx, %qx ", curSeg.fIOVMAddr, curSeg.fLength);
- // Cache this!
- for (UInt checkRemapIndex = 0; checkRemapIndex < internalState->fCopyPageCount; checkRemapIndex++)
- {
- if (trunc_page_64(curSeg.fIOVMAddr) == gIOCopyMapper->mapAddr(
- ptoa_64(internalState->fCopyPageAlloc + checkRemapIndex)))
- {
- curSeg.fIOVMAddr = ptoa_64(internalState->fCopyPageAlloc + checkRemapIndex) + (curSeg.fIOVMAddr & PAGE_MASK);
+IODMACommand::genIOVMSegments(uint32_t op,
+ InternalSegmentFunction outSegFunc,
+ void *reference,
+ UInt64 *offsetP,
+ void *segmentsP,
+ UInt32 *numSegmentsP)
+{
+ IODMACommandInternal * internalState = fInternalState;
+ IOOptionBits mdOp = kIOMDWalkSegments;
+ IOReturn ret = kIOReturnSuccess;
+
+ if (!(kWalkComplete & op) && !fActive) {
+ return kIOReturnNotReady;
+ }
+
+ if (!offsetP || !segmentsP || !numSegmentsP || !*numSegmentsP) {
+ return kIOReturnBadArgument;
+ }
+
+ IOMDDMAWalkSegmentArgs *state =
+ (IOMDDMAWalkSegmentArgs *)(void *) fState;
+
+ UInt64 offset = *offsetP + internalState->fPreparedOffset;
+ UInt64 memLength = internalState->fPreparedOffset + internalState->fPreparedLength;
+
+ if (offset >= memLength) {
+ return kIOReturnOverrun;
+ }
+
+ if ((offset == internalState->fPreparedOffset) || (offset != state->fOffset) || internalState->fNewMD) {
+ state->fOffset = 0;
+ internalState->fIOVMAddrValid = state->fIOVMAddr = 0;
+ internalState->fNextRemapPage = NULL;
+ internalState->fNewMD = false;
+ mdOp = kIOMDFirstSegment;
+ if (fMapper) {
+ if (internalState->fLocalMapperAllocValid) {
+ state->fMapped = true;
+ state->fMappedBase = internalState->fLocalMapperAlloc;
+ } else {
+ state->fMapped = false;
+ }
+ }
+ }
+
+ UInt32 segIndex = 0;
+ UInt32 numSegments = *numSegmentsP;
+ Segment64 curSeg = { 0, 0 };
+ bool curSegValid = false;
+ addr64_t maxPhys;
+
+ if (fNumAddressBits && (fNumAddressBits < 64)) {
+ maxPhys = (1ULL << fNumAddressBits);
+ } else {
+ maxPhys = 0;
+ }
+ maxPhys--;
+
+ while (internalState->fIOVMAddrValid || (state->fOffset < memLength)) {
+ // state = next seg
+ if (!internalState->fIOVMAddrValid) {
+ IOReturn rtn;
+
+ state->fOffset = offset;
+ state->fLength = memLength - offset;
+
+ bool done = false;
+ bool check = false;
+
+ if (internalState->fLocalMapperAllocValid) {
+ if (!internalState->fMapSegmentsCount) {
+ state->fIOVMAddr = internalState->fLocalMapperAlloc + offset - internalState->fPreparedOffset;
+ rtn = kIOReturnSuccess;
+ done = true;
+ check = true;
+ } else {
+ uint64_t address;
+ uint64_t length;
+ uint64_t runOffset;
+ uint64_t ind;
+ uint64_t off2Ind = internalState->fOffset2Index;
+
+ // Validate the previous offset
+ if (offset
+ && (offset == internalState->fNextOffset || off2Ind <= offset)) {
+ ind = internalState->fIndex;
+ } else {
+ ind = off2Ind = 0; // Start from beginning
+ }
+#if defined(LOGTAG)
+ if (LOGTAG == fMemory->getTag()) {
+ IOLog("DMA[%p] offsets 0x%qx, 0x%qx, 0x%qx ind %qd\n", this, offset, internalState->fPreparedOffset, internalState->fNextOffset, ind);
+ }
+#endif /* defined(LOGTAG) */
+
+ // Scan through iopl info blocks looking for block containing offset
+ while (ind < internalState->fMapSegmentsCount && offset >= internalState->fMapSegments[ind].fDMAOffset) {
+ ind++;
+ }
+ if (ind < internalState->fMapSegmentsCount) {
+ length = internalState->fMapSegments[ind].fDMAOffset;
+ } else {
+ length = memLength;
+ }
+ length -= offset; // Remainder within iopl
+
+ // Go back to actual range as search goes past it
+ ind--;
+ off2Ind = internalState->fMapSegments[ind].fDMAOffset;
+
+ // Subtract offset till this iopl in total list
+ runOffset = offset - off2Ind;
+
+ // Compute an offset relative to the mapped base
+
+ runOffset += internalState->fMapSegments[ind].fPageOffset;
+ address = internalState->fLocalMapperAllocBase + internalState->fMapSegments[ind].fMapOffset + runOffset;
+#if defined(LOGTAG)
+ if (LOGTAG == fMemory->getTag()) {
+ IOLog("DMA[%p] addrlen 0x%qx, 0x%qx\n", this, address, length);
+ }
+#endif /* defined(LOGTAG) */
+
+ state->fIOVMAddr = address;
+ state->fLength = length;
+
+ internalState->fIndex = ind;
+ internalState->fOffset2Index = off2Ind;
+ internalState->fNextOffset = state->fOffset + length;
+
+ rtn = kIOReturnSuccess;
+ done = true;
+ check = true;
+ }
+ }
+
+ if (!done) {
+ IOMemoryDescriptor * memory =
+ internalState->fCopyMD ? internalState->fCopyMD.get() : fMemory.get();
+ rtn = memory->dmaCommandOperation(mdOp, fState, sizeof(fState));
+ mdOp = kIOMDWalkSegments;
+ }
+#if 0
+ if (check
+ && !ml_at_interrupt_context()
+ && (rtn == kIOReturnSuccess)
+ && fMapper
+ && strcmp("AppleNVMeMMU", fMapper->getName())) {
+ uint64_t checkOffset;
+ IOPhysicalLength segLen;
+ IOMemoryDescriptor * memory =
+ internalState->fCopyMD ? internalState->fCopyMD.get() : fMemory.get();
+ for (checkOffset = 0; checkOffset < state->fLength;) {
+ addr64_t phys = memory->getPhysicalSegment(offset + checkOffset, &segLen, kIOMemoryMapperNone);
+ addr64_t mapperPhys;
+
+ mapperPhys = fMapper->mapToPhysicalAddress(state->fIOVMAddr + checkOffset);
+ mapperPhys |= (phys & (fMapper->getPageSize() - 1));
+ if (mapperPhys != phys) {
+ panic("DMA[%p] mismatch at offset %llx + %llx, dma %llx mapperPhys %llx != %llx, len %llx\n",
+ this, offset, checkOffset,
+ state->fIOVMAddr + checkOffset, mapperPhys, phys, state->fLength);
+ }
+ checkOffset += page_size - (phys & page_mask);
+ }
+ }
+#endif
+ if (rtn == kIOReturnSuccess) {
+ internalState->fIOVMAddrValid = true;
+ assert(state->fLength);
+ if (curSegValid && ((curSeg.fIOVMAddr + curSeg.fLength) == state->fIOVMAddr)) {
+ UInt64 length = state->fLength;
+ offset += length;
+ curSeg.fLength += length;
+ internalState->fIOVMAddrValid = state->fIOVMAddr = 0;
+ }
+ } else if (rtn == kIOReturnOverrun) {
+ internalState->fIOVMAddrValid = state->fIOVMAddr = state->fLength = 0; // At end
+ } else {
+ return rtn;
+ }
+ }
+
+ // seg = state, offset = end of seg
+ if (!curSegValid) {
+ UInt64 length = state->fLength;
+ offset += length;
+ curSeg.fIOVMAddr = state->fIOVMAddr;
+ curSeg.fLength = length;
+ curSegValid = true;
+ internalState->fIOVMAddrValid = state->fIOVMAddr = 0;
+ }
+
+ if (!internalState->fIOVMAddrValid) {
+ // maxPhys
+ if ((kWalkClient & op) && (curSeg.fIOVMAddr + curSeg.fLength - 1) > maxPhys) {
+ if (internalState->fCursor) {
+ curSegValid = curSeg.fIOVMAddr = 0;
+ ret = kIOReturnMessageTooLarge;
+ break;
+ } else if (curSeg.fIOVMAddr <= maxPhys) {
+ UInt64 remain, newLength;
+
+ newLength = (maxPhys + 1 - curSeg.fIOVMAddr);
+ DEBG("trunc %qx, %qx-> %qx\n", curSeg.fIOVMAddr, curSeg.fLength, newLength);
+ remain = curSeg.fLength - newLength;
+ state->fIOVMAddr = newLength + curSeg.fIOVMAddr;
+ internalState->fIOVMAddrValid = true;
+ curSeg.fLength = newLength;
+ state->fLength = remain;
+ offset -= remain;
+ } else {
+ UInt64 addr = curSeg.fIOVMAddr;
+ ppnum_t addrPage = (ppnum_t) atop_64(addr);
+ vm_page_t remap = NULL;
+ UInt64 remain, newLength;
+
+ DEBG("sparse switch %qx, %qx ", addr, curSeg.fLength);
+
+ remap = internalState->fNextRemapPage;
+ if (remap && (addrPage == vm_page_get_offset(remap))) {
+ } else {
+ for (remap = internalState->fCopyPageAlloc;
+ remap && (addrPage != vm_page_get_offset(remap));
+ remap = vm_page_get_next(remap)) {
+ }
+ }
+
+ if (!remap) {
+ panic("no remap page found");
+ }
+
+ curSeg.fIOVMAddr = ptoa_64(vm_page_get_phys_page(remap))
+ + (addr & PAGE_MASK);
+ curSegValid = true;
+ internalState->fNextRemapPage = vm_page_get_next(remap);
+
+ newLength = PAGE_SIZE - (addr & PAGE_MASK);
+ if (newLength < curSeg.fLength) {
+ remain = curSeg.fLength - newLength;
+ state->fIOVMAddr = addr + newLength;
+ internalState->fIOVMAddrValid = true;
+ curSeg.fLength = newLength;
+ state->fLength = remain;
+ offset -= remain;
+ }
+ DEBG("-> %qx, %qx offset %qx\n", curSeg.fIOVMAddr, curSeg.fLength, offset);
+ }
+ }
+
+ // reduce size of output segment
+ uint64_t reduce, leftover = 0;
+
+ // fMaxSegmentSize
+ if (curSeg.fLength > fMaxSegmentSize) {
+ leftover += curSeg.fLength - fMaxSegmentSize;
+ curSeg.fLength = fMaxSegmentSize;
+ state->fIOVMAddr = curSeg.fLength + curSeg.fIOVMAddr;
+ internalState->fIOVMAddrValid = true;
+ }
+
+ // alignment current length
+
+ reduce = (curSeg.fLength & fAlignMaskLength);
+ if (reduce && (curSeg.fLength > reduce)) {
+ leftover += reduce;
+ curSeg.fLength -= reduce;
+ state->fIOVMAddr = curSeg.fLength + curSeg.fIOVMAddr;
+ internalState->fIOVMAddrValid = true;
+ }
+
+ // alignment next address
+
+ reduce = (state->fIOVMAddr & fAlignMaskInternalSegments);
+ if (reduce && (curSeg.fLength > reduce)) {
+ leftover += reduce;
+ curSeg.fLength -= reduce;
+ state->fIOVMAddr = curSeg.fLength + curSeg.fIOVMAddr;
+ internalState->fIOVMAddrValid = true;
+ }
+
+ if (leftover) {
+ DEBG("reduce seg by 0x%llx @ 0x%llx [0x%llx, 0x%llx]\n",
+ leftover, offset,
+ curSeg.fIOVMAddr, curSeg.fLength);
+ state->fLength = leftover;
+ offset -= leftover;
+ }
+
+ //
+
+ if (internalState->fCursor) {
+ bool misaligned;
+ uint32_t mask;
+
+ mask = (segIndex ? fAlignMaskInternalSegments : internalState->fSourceAlignMask);
+ misaligned = (0 != (mask & curSeg.fIOVMAddr));
+ if (!misaligned) {
+ mask = fAlignMaskLength;
+ misaligned |= (0 != (mask & curSeg.fLength));
+ }
+ if (misaligned) {
+ if (misaligned) {
+ DEBG("cursor misaligned %qx:%qx\n", curSeg.fIOVMAddr, curSeg.fLength);
+ }
+ curSegValid = curSeg.fIOVMAddr = 0;
+ ret = kIOReturnNotAligned;
+ break;
+ }
+ }
+
+ if (offset >= memLength) {
+ curSeg.fLength -= (offset - memLength);
+ offset = memLength;
+ internalState->fIOVMAddrValid = state->fIOVMAddr = state->fLength = 0; // At end
+ break;
+ }
+ }
+
+ if (internalState->fIOVMAddrValid) {
+ if ((segIndex + 1 == numSegments)) {
break;
- }
}
- DEBG("-> %qx, %qx\n", curSeg.fIOVMAddr, curSeg.fLength);
- }
- }
- }
-
- if (curSeg.fLength > fMaxSegmentSize)
- {
- UInt64 remain = curSeg.fLength - fMaxSegmentSize;
-
- state->fIOVMAddr = fMaxSegmentSize + curSeg.fIOVMAddr;
- curSeg.fLength = fMaxSegmentSize;
-
- state->fLength = remain;
- offset -= remain;
- }
-
- if (internalState->fCursor
- && (0 != (fAlignMask & curSeg.fIOVMAddr)))
- {
- curSeg.fIOVMAddr = 0;
- ret = kIOReturnNotAligned;
- break;
- }
-
- if (offset >= memLength)
- {
- curSeg.fLength -= (offset - memLength);
- offset = memLength;
- state->fIOVMAddr = state->fLength = 0; // At end
- break;
- }
- }
-
- if (state->fIOVMAddr) {
- if ((segIndex + 1 == numSegments))
- break;
-
- ret = (*outSegFunc)(reference, this, curSeg, segmentsP, segIndex++);
- curSeg.fIOVMAddr = 0;
- if (kIOReturnSuccess != ret)
- break;
- }
- }
-
- if (curSeg.fIOVMAddr) {
- ret = (*outSegFunc)(reference, this, curSeg, segmentsP, segIndex++);
- }
-
- if (kIOReturnSuccess == ret)
- {
- state->fOffset = offset;
- *offsetP = offset - internalState->fPreparedOffset;
- *numSegmentsP = segIndex;
- }
- return ret;
-}
-
-IOReturn
+#if defined(LOGTAG)
+ if ((LOGTAG == fMemory->getTag()) && (kWalkClient == op)) {
+ IOLog("DMA[%p] outseg 0x%qx, 0x%qx\n", this, curSeg.fIOVMAddr, curSeg.fLength);
+ }
+#endif /* defined(LOGTAG) */
+ ret = (*outSegFunc)(reference, this, curSeg, segmentsP, segIndex++);
+ curSegValid = curSeg.fIOVMAddr = 0;
+ if (kIOReturnSuccess != ret) {
+ break;
+ }
+ }
+ }
+
+ if (curSegValid) {
+#if defined(LOGTAG)
+ if ((LOGTAG == fMemory->getTag()) && (kWalkClient == op)) {
+ IOLog("DMA[%p] outseg 0x%qx, 0x%qx\n", this, curSeg.fIOVMAddr, curSeg.fLength);
+ }
+#endif /* defined(LOGTAG) */
+ ret = (*outSegFunc)(reference, this, curSeg, segmentsP, segIndex++);
+ }
+
+ if (kIOReturnSuccess == ret) {
+ state->fOffset = offset;
+ *offsetP = offset - internalState->fPreparedOffset;
+ *numSegmentsP = segIndex;
+ }
+ return ret;
+}
+
+IOReturn
IODMACommand::clientOutputSegment(
void *reference, IODMACommand *target,
Segment64 segment, void *vSegList, UInt32 outSegIndex)
{
- IOReturn ret = kIOReturnSuccess;
+ SegmentFunction segmentFunction = (SegmentFunction) reference;
+ IOReturn ret = kIOReturnSuccess;
+
+ if (target->fNumAddressBits && (target->fNumAddressBits < 64)
+ && ((segment.fIOVMAddr + segment.fLength - 1) >> target->fNumAddressBits)
+ && (target->reserved->fLocalMapperAllocValid || !target->fMapper)) {
+ DEBG("kIOReturnMessageTooLarge(fNumAddressBits) %qx, %qx\n", segment.fIOVMAddr, segment.fLength);
+ ret = kIOReturnMessageTooLarge;
+ }
- if ((target->fNumAddressBits < 64)
- && ((segment.fIOVMAddr + segment.fLength - 1) >> target->fNumAddressBits))
- {
- DEBG("kIOReturnMessageTooLarge(fNumAddressBits) %qx, %qx\n", segment.fIOVMAddr, segment.fLength);
- ret = kIOReturnMessageTooLarge;
- }
+ if (!(*segmentFunction)(target, segment, vSegList, outSegIndex)) {
+ DEBG("kIOReturnMessageTooLarge(fOutSeg) %qx, %qx\n", segment.fIOVMAddr, segment.fLength);
+ ret = kIOReturnMessageTooLarge;
+ }
- if (!(*target->fOutSeg)(target, segment, vSegList, outSegIndex))
- {
- DEBG("kIOReturnMessageTooLarge(fOutSeg) %qx, %qx\n", segment.fIOVMAddr, segment.fLength);
- ret = kIOReturnMessageTooLarge;
- }
+ return ret;
+}
- return (ret);
+IOReturn
+IODMACommand::genIOVMSegments(SegmentFunction segmentFunction,
+ UInt64 *offsetP,
+ void *segmentsP,
+ UInt32 *numSegmentsP)
+{
+ return genIOVMSegments(kWalkClient, clientOutputSegment, (void *) segmentFunction,
+ offsetP, segmentsP, numSegmentsP);
}
-bool
+bool
IODMACommand::OutputHost32(IODMACommand *,
- Segment64 segment, void *vSegList, UInt32 outSegIndex)
+ Segment64 segment, void *vSegList, UInt32 outSegIndex)
{
- Segment32 *base = (Segment32 *) vSegList;
- base[outSegIndex].fIOVMAddr = (UInt32) segment.fIOVMAddr;
- base[outSegIndex].fLength = (UInt32) segment.fLength;
- return true;
+ Segment32 *base = (Segment32 *) vSegList;
+ base[outSegIndex].fIOVMAddr = (UInt32) segment.fIOVMAddr;
+ base[outSegIndex].fLength = (UInt32) segment.fLength;
+ return true;
}
-bool
+bool
IODMACommand::OutputBig32(IODMACommand *,
- Segment64 segment, void *vSegList, UInt32 outSegIndex)
+ Segment64 segment, void *vSegList, UInt32 outSegIndex)
{
- const UInt offAddr = outSegIndex * sizeof(Segment32);
- const UInt offLen = offAddr + sizeof(UInt32);
- OSWriteBigInt32(vSegList, offAddr, (UInt32) segment.fIOVMAddr);
- OSWriteBigInt32(vSegList, offLen, (UInt32) segment.fLength);
- return true;
+ const UInt offAddr = outSegIndex * sizeof(Segment32);
+ const UInt offLen = offAddr + sizeof(UInt32);
+ OSWriteBigInt32(vSegList, offAddr, (UInt32) segment.fIOVMAddr);
+ OSWriteBigInt32(vSegList, offLen, (UInt32) segment.fLength);
+ return true;
}
bool
IODMACommand::OutputLittle32(IODMACommand *,
- Segment64 segment, void *vSegList, UInt32 outSegIndex)
+ Segment64 segment, void *vSegList, UInt32 outSegIndex)
{
- const UInt offAddr = outSegIndex * sizeof(Segment32);
- const UInt offLen = offAddr + sizeof(UInt32);
- OSWriteLittleInt32(vSegList, offAddr, (UInt32) segment.fIOVMAddr);
- OSWriteLittleInt32(vSegList, offLen, (UInt32) segment.fLength);
- return true;
+ const UInt offAddr = outSegIndex * sizeof(Segment32);
+ const UInt offLen = offAddr + sizeof(UInt32);
+ OSWriteLittleInt32(vSegList, offAddr, (UInt32) segment.fIOVMAddr);
+ OSWriteLittleInt32(vSegList, offLen, (UInt32) segment.fLength);
+ return true;
}
bool
IODMACommand::OutputHost64(IODMACommand *,
- Segment64 segment, void *vSegList, UInt32 outSegIndex)
+ Segment64 segment, void *vSegList, UInt32 outSegIndex)
{
- Segment64 *base = (Segment64 *) vSegList;
- base[outSegIndex] = segment;
- return true;
+ Segment64 *base = (Segment64 *) vSegList;
+ base[outSegIndex] = segment;
+ return true;
}
bool
IODMACommand::OutputBig64(IODMACommand *,
- Segment64 segment, void *vSegList, UInt32 outSegIndex)
+ Segment64 segment, void *vSegList, UInt32 outSegIndex)
{
- const UInt offAddr = outSegIndex * sizeof(Segment64);
- const UInt offLen = offAddr + sizeof(UInt64);
- OSWriteBigInt64(vSegList, offAddr, (UInt64) segment.fIOVMAddr);
- OSWriteBigInt64(vSegList, offLen, (UInt64) segment.fLength);
- return true;
+ const UInt offAddr = outSegIndex * sizeof(Segment64);
+ const UInt offLen = offAddr + sizeof(UInt64);
+ OSWriteBigInt64(vSegList, offAddr, (UInt64) segment.fIOVMAddr);
+ OSWriteBigInt64(vSegList, offLen, (UInt64) segment.fLength);
+ return true;
}
bool
IODMACommand::OutputLittle64(IODMACommand *,
- Segment64 segment, void *vSegList, UInt32 outSegIndex)
+ Segment64 segment, void *vSegList, UInt32 outSegIndex)
{
- const UInt offAddr = outSegIndex * sizeof(Segment64);
- const UInt offLen = offAddr + sizeof(UInt64);
- OSWriteLittleInt64(vSegList, offAddr, (UInt64) segment.fIOVMAddr);
- OSWriteLittleInt64(vSegList, offLen, (UInt64) segment.fLength);
- return true;
+ const UInt offAddr = outSegIndex * sizeof(Segment64);
+ const UInt offLen = offAddr + sizeof(UInt64);
+ OSWriteLittleInt64(vSegList, offAddr, (UInt64) segment.fIOVMAddr);
+ OSWriteLittleInt64(vSegList, offLen, (UInt64) segment.fLength);
+ return true;
}
-
-
projects / apple / xnu.git / blobdiff