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--- xnu/xnu-12377.101.15/iokit/Kernel/IOMapper.cpp
+++ /dev/null
@@ -1,396 +0,0 @@
-/*
- * Copyright (c) 1998-2016 Apple Inc. All rights reserved.
- *
- * @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, 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/IOLib.h>
-#include <IOKit/IOMapper.h>
-#include <IOKit/IODMACommand.h>
-#include <libkern/c++/OSData.h>
-#include <libkern/OSDebug.h>
-#include <mach_debug/zone_info.h>
-#include <vm/vm_iokit.h>
-#include "IOKitKernelInternal.h"
-
-__BEGIN_DECLS
-extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
-__END_DECLS
-
-#define super IOService
-OSDefineMetaClassAndAbstractStructors(IOMapper, IOService);
-
-OSMetaClassDefineReservedUnused(IOMapper, 0);
-OSMetaClassDefineReservedUnused(IOMapper, 1);
-OSMetaClassDefineReservedUnused(IOMapper, 2);
-OSMetaClassDefineReservedUnused(IOMapper, 3);
-OSMetaClassDefineReservedUnused(IOMapper, 4);
-OSMetaClassDefineReservedUnused(IOMapper, 5);
-OSMetaClassDefineReservedUnused(IOMapper, 6);
-OSMetaClassDefineReservedUnused(IOMapper, 7);
-OSMetaClassDefineReservedUnused(IOMapper, 8);
-OSMetaClassDefineReservedUnused(IOMapper, 9);
-OSMetaClassDefineReservedUnused(IOMapper, 10);
-OSMetaClassDefineReservedUnused(IOMapper, 11);
-OSMetaClassDefineReservedUnused(IOMapper, 12);
-OSMetaClassDefineReservedUnused(IOMapper, 13);
-OSMetaClassDefineReservedUnused(IOMapper, 14);
-OSMetaClassDefineReservedUnused(IOMapper, 15);
-
-IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown;
-
-class IOMapperLock {
- IOLock *fWaitLock;
-public:
- IOMapperLock()
- {
- fWaitLock = IOLockAlloc();
- }
- ~IOMapperLock()
- {
- IOLockFree(fWaitLock);
- }
-
- void
- lock()
- {
- IOLockLock(fWaitLock);
- }
- void
- unlock()
- {
- IOLockUnlock(fWaitLock);
- }
- void
- sleep(void *event)
- {
- IOLockSleep(fWaitLock, event, THREAD_UNINT);
- }
- void
- wakeup(void *event)
- {
- IOLockWakeup(fWaitLock, event, false);
- }
-};
-
-static IOMapperLock sMapperLock;
-
-bool
-IOMapper::start(IOService *provider)
-{
- OSSharedPtr<OSObject> obj;
- if (!super::start(provider)) {
- return false;
- }
-
- if (!initHardware(provider)) {
- return false;
- }
-
- uint64_t pageSize = getPageSize();
- assert(pageSize <= UINT_MAX);
- fPageSize = (uint32_t) pageSize;
-
- if (fIsSystem) {
- sMapperLock.lock();
- IOMapper::gSystem = this;
- sMapperLock.wakeup(&IOMapper::gSystem);
- sMapperLock.unlock();
- }
-
- if (provider) {
- obj = provider->copyProperty("iommu-id");
- if (!obj) {
- obj = provider->copyProperty("AAPL,phandle");
- }
- if (obj) {
- setProperty(gIOMapperIDKey, obj.get());
- }
- }
- return true;
-}
-
-void
-IOMapper::free()
-{
- super::free();
-}
-
-void
-IOMapper::setMapperRequired(bool hasMapper)
-{
- if (hasMapper) {
- IOMapper::gSystem = (IOMapper *) kHasMapper;
- } else {
- sMapperLock.lock();
- IOMapper::gSystem = (IOMapper *) kNoMapper;
- sMapperLock.unlock();
- sMapperLock.wakeup(&IOMapper::gSystem);
- }
-}
-
-void
-IOMapper::waitForSystemMapper()
-{
- sMapperLock.lock();
- while ((uintptr_t) IOMapper::gSystem & kWaitMask) {
- OSReportWithBacktrace("waitForSystemMapper");
- sMapperLock.sleep(&IOMapper::gSystem);
- }
- sMapperLock.unlock();
-}
-
-OSSharedPtr<IOMapper>
-IOMapper::copyMapperForDevice(IOService * device)
-{
- return copyMapperForDeviceWithIndex(device, 0);
-}
-
-OSSharedPtr<IOMapper>
-IOMapper::copyMapperForDeviceWithIndex(IOService * device, unsigned int index)
-{
- OSSharedPtr<OSData> data;
- OSSharedPtr<OSObject> obj;
- OSSharedPtr<IOMapper> mapper;
- OSSharedPtr<OSDictionary> matching;
-
- obj = device->copyProperty("iommu-parent");
- if (!obj) {
- return NULL;
- }
-
- if ((mapper = OSDynamicPtrCast<IOMapper>(obj))) {
- goto found;
- }
-
- if ((data = OSDynamicPtrCast<OSData>(obj))) {
- if (index >= data->getLength() / sizeof(UInt32)) {
- goto found;
- }
-
- data = OSData::withValueNoCopy(*((UInt32 *)data->getBytesNoCopy() + index));
- if (!data) {
- goto found;
- }
-
- matching = IOService::propertyMatching(gIOMapperIDKey, data.get());
- } else {
- matching = IOService::propertyMatching(gIOMapperIDKey, obj.get());
- }
-
- if (matching) {
- mapper = OSDynamicPtrCast<IOMapper>(IOService::waitForMatchingService(matching.get()));
- }
-
-found:
- if (mapper) {
- if (!mapper->fAllocName) {
- char name[MACH_ZONE_NAME_MAX_LEN];
- char kmodname[KMOD_MAX_NAME];
- vm_tag_t tag;
- uint32_t kmodid;
-
- tag = IOMemoryTag(kernel_map);
- if (!(kmodid = vm_tag_get_kext(tag, &kmodname[0], KMOD_MAX_NAME))) {
- snprintf(kmodname, sizeof(kmodname), "%d", tag);
- }
- snprintf(name, sizeof(name), "%s.DMA.%s", kmodname, device->getName());
- mapper->fAllocName = kern_allocation_name_allocate(name, 16);
- }
- }
-
- return mapper;
-}
-
-__BEGIN_DECLS
-
-// These are C accessors to the system mapper for non-IOKit clients
-ppnum_t
-IOMapperIOVMAlloc(unsigned pages)
-{
- IOReturn ret;
- uint64_t dmaAddress, dmaLength;
-
- IOMapper::checkForSystemMapper();
-
- ret = kIOReturnUnsupported;
- if (IOMapper::gSystem) {
- ret = IOMapper::gSystem->iovmMapMemory(
- NULL, 0, ptoa_64(pages),
- (kIODMAMapReadAccess | kIODMAMapWriteAccess),
- NULL, NULL, NULL,
- &dmaAddress, &dmaLength);
- }
-
- if (kIOReturnSuccess == ret) {
- uint64_t dmaAddressPage64;
- dmaAddressPage64 = atop_64(dmaAddress);
- if (dmaAddressPage64 > UINT_MAX) {
- return 0;
- }
- return (ppnum_t) atop_64(dmaAddress);
- }
- return 0;
-}
-
-void
-IOMapperIOVMFree(ppnum_t addr, unsigned pages)
-{
- if (IOMapper::gSystem) {
- IOMapper::gSystem->iovmUnmapMemory(NULL, NULL, ptoa_64(addr), ptoa_64(pages));
- }
-}
-
-ppnum_t
-IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page)
-{
- if (!IOMapper::gSystem) {
- return page;
- }
- if (!addr) {
- panic("!addr");
- }
- IOMapper::gSystem->iovmInsert((kIODMAMapReadAccess | kIODMAMapWriteAccess),
- ptoa_64(addr), ptoa_64(offset), ptoa_64(page), ptoa_64(1));
- return addr + offset;
-}
-
-/////////////////////////////////////////////////////////////////////////////
-//
-//
-// IOLib.h APIs
-//
-//
-/////////////////////////////////////////////////////////////////////////////
-
-#include <machine/machine_routines.h>
-
-UInt8
-IOMappedRead8(IOPhysicalAddress address)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- return (UInt8) ml_phys_read_byte_64(addr);
- } else {
- return (UInt8) ml_phys_read_byte((vm_offset_t) address);
- }
-}
-
-UInt16
-IOMappedRead16(IOPhysicalAddress address)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- return (UInt16) ml_phys_read_half_64(addr);
- } else {
- return (UInt16) ml_phys_read_half((vm_offset_t) address);
- }
-}
-
-UInt32
-IOMappedRead32(IOPhysicalAddress address)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- return (UInt32) ml_phys_read_word_64(addr);
- } else {
- return (UInt32) ml_phys_read_word((vm_offset_t) address);
- }
-}
-
-UInt64
-IOMappedRead64(IOPhysicalAddress address)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- return (UInt64) ml_phys_read_double_64(addr);
- } else {
- return (UInt64) ml_phys_read_double((vm_offset_t) address);
- }
-}
-
-void
-IOMappedWrite8(IOPhysicalAddress address, UInt8 value)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- ml_phys_write_byte_64(addr, value);
- } else {
- ml_phys_write_byte((vm_offset_t) address, value);
- }
-}
-
-void
-IOMappedWrite16(IOPhysicalAddress address, UInt16 value)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- ml_phys_write_half_64(addr, value);
- } else {
- ml_phys_write_half((vm_offset_t) address, value);
- }
-}
-
-void
-IOMappedWrite32(IOPhysicalAddress address, UInt32 value)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- ml_phys_write_word_64(addr, value);
- } else {
- ml_phys_write_word((vm_offset_t) address, value);
- }
-}
-
-void
-IOMappedWrite64(IOPhysicalAddress address, UInt64 value)
-{
- IOMapper::checkForSystemMapper();
-
- if (IOMapper::gSystem) {
- addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address);
- ml_phys_write_double_64(addr, value);
- } else {
- ml_phys_write_double((vm_offset_t) address, value);
- }
-}
-
-__END_DECLS