/
IOPCIBridge.cpp
4031 lines (3450 loc) · 122 KB
/
IOPCIBridge.cpp
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/*
* Copyright (c) 1998-2000 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
* 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@
*/
#include <IOKit/system.h>
#include <IOKit/pci/IOPCIBridge.h>
#include <IOKit/pci/IOPCIPrivate.h>
#include <IOKit/pci/IOAGPDevice.h>
#include <IOKit/pci/IOPCIConfigurator.h>
#if ACPI_SUPPORT
#include <IOKit/acpi/IOACPIPlatformDevice.h>
#endif
#include <IOKit/IODeviceTreeSupport.h>
#include <IOKit/IOSubMemoryDescriptor.h>
#include <IOKit/IORangeAllocator.h>
#include <IOKit/IOPlatformExpert.h>
#include <IOKit/pwr_mgt/IOPMPrivate.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOKitKeys.h>
#include <IOKit/IOMessage.h>
#include <IOKit/assert.h>
#include <IOKit/IOCatalogue.h>
#include <IOKit/IOFilterInterruptEventSource.h>
#include <IOKit/IOTimerEventSource.h>
#include <IOKit/IOPolledInterface.h>
#include <IOKit/IOUserClient.h>
#include <libkern/c++/OSContainers.h>
#include <libkern/OSKextLib.h>
#include <libkern/version.h>
extern "C"
{
#include <machine/machine_routines.h>
};
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#ifndef VERSION_MAJOR
#error VERSION_MAJOR
#endif
#if VERSION_MAJOR < 10
#define ROM_KEXTS 1
#endif
#ifndef kIOPolledInterfaceActiveKey
#define kIOPolledInterfaceActiveKey "IOPolledInterfaceActive"
#endif
// #define DEADTEST "UPS0"
// #define DEFERTEST 1
enum
{
kIOPCIClassBridge = 0x06,
kIOPCIClassNetwork = 0x02,
kIOPCIClassGraphics = 0x03,
kIOPCIClassMultimedia = 0x04,
kIOPCISubClassBridgeHost = 0x00,
kIOPCISubClassBridgeISA = 0x01,
kIOPCISubClassBridgeEISA = 0x02,
kIOPCISubClassBridgeMCA = 0x03,
kIOPCISubClassBridgePCI = 0x04,
kIOPCISubClassBridgePCMCIA = 0x05,
kIOPCISubClassBridgeNuBus = 0x06,
kIOPCISubClassBridgeCardBus = 0x07,
kIOPCISubClassBridgeRaceWay = 0x08,
kIOPCISubClassBridgeOther = 0x80,
};
enum
{
kCheckLinkParents = 0x00000001,
};
enum { kAERISRNum = 4 };
enum { kIOPCIEventNum = 8 };
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
const IORegistryPlane * gIOPCIACPIPlane;
static class IOPCIMessagedInterruptController * gIOPCIMessagedInterruptController;
static IOSimpleLock * gIOPCIEventSourceLock;
static queue_head_t gIOPCIEventSourceQueue;
static IOSimpleLock * gIOAllPCI2PCIBridgesLock;
static UInt32 gIOAllPCI2PCIBridgeState;
static uint64_t gIOPCIWakeCount = 0x100000001ULL;
static IOLock * gIOPCIWakeReasonLock;
const OSSymbol * gIOPCITunnelIDKey;
const OSSymbol * gIOPCITunnelledKey;
const OSSymbol * gIOPCIThunderboltKey;
const OSSymbol * gIOPCITunnelL1EnableKey;
const OSSymbol * gIOPlatformDeviceMessageKey;
const OSSymbol * gIOPlatformDeviceASPMEnableKey;
const OSSymbol * gIOPlatformSetDeviceInterruptsKey;
const OSSymbol * gIOPlatformResolvePCIInterruptKey;
const OSSymbol * gIOPlatformFreeDeviceResourcesKey;
const OSSymbol * gIOPlatformGetMessagedInterruptControllerKey;
const OSSymbol * gIOPlatformGetMessagedInterruptAddressKey;
const OSSymbol * gIOPolledInterfaceActiveKey;
#if ACPI_SUPPORT
const OSSymbol * gIOPCIPSMethods[kIOPCIDevicePowerStateCount];
#endif
static queue_head_t gIOAllPCIDeviceRestoreQ;
static uint32_t gIOPCITunnelSleep;
static uint32_t gIOPCITunnelWait;
static IOWorkLoop * gIOPCIConfigWorkLoop;
static IOPCIConfigurator * gIOPCIConfigurator;
uint32_t gIOPCIFlags = 0
| kIOPCIConfiguratorAllocate
| kIOPCIConfiguratorPFM64
| kIOPCIConfiguratorCheckTunnel
| kIOPCIConfiguratorTBMSIEnable
#if !ACPI_SUPPORT
| kIOPCIConfiguratorAER
#endif
// | kIOPCIConfiguratorDeepIdle
// | kIOPCIConfiguratorNoSplay
// | kIOPCIConfiguratorNoTB
// | kIOPCIConfiguratorIOLog | kIOPCIConfiguratorKPrintf
;
#define DLOG(fmt, args...) \
do { \
if ((gIOPCIFlags & kIOPCIConfiguratorIOLog) && !ml_at_interrupt_context()) \
IOLog(fmt, ## args); \
if (gIOPCIFlags & kIOPCIConfiguratorKPrintf) \
kprintf(fmt, ## args); \
} while(0)
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
enum
{
// data link change, hot plug, presence detect change
kSlotControlEnables = ((1 << 12) | (1 << 5) | (1 << 3))
};
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
struct IOPCIAERISREntry
{
uint32_t source;
uint32_t status;
};
struct IOPCIAERRoot
{
IOPCIAERISREntry * fISRErrors;
uint8_t fAERReadIndex;
uint8_t fAERWriteIndex;
};
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#undef super
#include "vtd.c"
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#undef super
#define super IOService
OSDefineMetaClassAndAbstractStructorsWithInit( IOPCIBridge, IOService, IOPCIBridge::initialize() )
OSMetaClassDefineReservedUsed(IOPCIBridge, 0);
OSMetaClassDefineReservedUsed(IOPCIBridge, 1);
OSMetaClassDefineReservedUsed(IOPCIBridge, 2);
OSMetaClassDefineReservedUsed(IOPCIBridge, 3);
OSMetaClassDefineReservedUsed(IOPCIBridge, 4);
OSMetaClassDefineReservedUsed(IOPCIBridge, 5);
OSMetaClassDefineReservedUnused(IOPCIBridge, 6);
OSMetaClassDefineReservedUnused(IOPCIBridge, 7);
OSMetaClassDefineReservedUnused(IOPCIBridge, 8);
OSMetaClassDefineReservedUnused(IOPCIBridge, 9);
OSMetaClassDefineReservedUnused(IOPCIBridge, 10);
OSMetaClassDefineReservedUnused(IOPCIBridge, 11);
OSMetaClassDefineReservedUnused(IOPCIBridge, 12);
OSMetaClassDefineReservedUnused(IOPCIBridge, 13);
OSMetaClassDefineReservedUnused(IOPCIBridge, 14);
OSMetaClassDefineReservedUnused(IOPCIBridge, 15);
OSMetaClassDefineReservedUnused(IOPCIBridge, 16);
OSMetaClassDefineReservedUnused(IOPCIBridge, 17);
OSMetaClassDefineReservedUnused(IOPCIBridge, 18);
OSMetaClassDefineReservedUnused(IOPCIBridge, 19);
OSMetaClassDefineReservedUnused(IOPCIBridge, 20);
OSMetaClassDefineReservedUnused(IOPCIBridge, 21);
OSMetaClassDefineReservedUnused(IOPCIBridge, 22);
OSMetaClassDefineReservedUnused(IOPCIBridge, 23);
OSMetaClassDefineReservedUnused(IOPCIBridge, 24);
OSMetaClassDefineReservedUnused(IOPCIBridge, 25);
OSMetaClassDefineReservedUnused(IOPCIBridge, 26);
OSMetaClassDefineReservedUnused(IOPCIBridge, 27);
OSMetaClassDefineReservedUnused(IOPCIBridge, 28);
OSMetaClassDefineReservedUnused(IOPCIBridge, 29);
OSMetaClassDefineReservedUnused(IOPCIBridge, 30);
OSMetaClassDefineReservedUnused(IOPCIBridge, 31);
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#ifndef kIOPlatformDeviceMessageKey
#define kIOPlatformDeviceMessageKey "IOPlatformDeviceMessage"
#endif
#ifndef kIOPlatformSetDeviceInterruptsKey
#define kIOPlatformSetDeviceInterruptsKey "SetDeviceInterrupts"
#endif
#ifndef kIOPlatformResolvePCIInterruptKey
#define kIOPlatformResolvePCIInterruptKey "ResolvePCIInterrupt"
#endif
#ifndef kIOPlatformFreeDeviceResourcesKey
#define kIOPlatformFreeDeviceResourcesKey "IOPlatformFreeDeviceResources"
#endif
#ifndef kIOPlatformGetMessagedInterruptAddressKey
#define kIOPlatformGetMessagedInterruptAddressKey "GetMessagedInterruptAddress"
#endif
#ifndef kIOPlatformGetMessagedInterruptControllerKey
#define kIOPlatformGetMessagedInterruptControllerKey "GetMessagedInterruptController"
#endif
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
void IOPCIBridge::initialize(void)
{
if (!gIOAllPCI2PCIBridgesLock)
{
gIOAllPCI2PCIBridgesLock = IOSimpleLockAlloc();
gIOPCIEventSourceLock = IOSimpleLockAlloc();
queue_init(&gIOAllPCIDeviceRestoreQ);
queue_init(&gIOPCIEventSourceQueue);
gIOPCIWakeReasonLock = IOLockAlloc();
gIOPlatformDeviceMessageKey
= OSSymbol::withCStringNoCopy(kIOPlatformDeviceMessageKey);
gIOPlatformDeviceASPMEnableKey
= OSSymbol::withCStringNoCopy(kIOPlatformDeviceASPMEnableKey);
gIOPlatformSetDeviceInterruptsKey
= OSSymbol::withCStringNoCopy(kIOPlatformSetDeviceInterruptsKey);
gIOPlatformResolvePCIInterruptKey
= OSSymbol::withCStringNoCopy(kIOPlatformResolvePCIInterruptKey);
gIOPlatformFreeDeviceResourcesKey
= OSSymbol::withCStringNoCopy(kIOPlatformFreeDeviceResourcesKey);
gIOPlatformGetMessagedInterruptAddressKey
= OSSymbol::withCStringNoCopy(kIOPlatformGetMessagedInterruptAddressKey);
gIOPlatformGetMessagedInterruptControllerKey
= OSSymbol::withCStringNoCopy(kIOPlatformGetMessagedInterruptControllerKey);
#if ACPI_SUPPORT
gIOPCIPSMethods[kIOPCIDeviceOffState] = OSSymbol::withCStringNoCopy("_PS3");
gIOPCIPSMethods[kIOPCIDeviceDozeState] = OSSymbol::withCStringNoCopy("RPS3");
gIOPCIPSMethods[kIOPCIDeviceOnState] = OSSymbol::withCStringNoCopy("_PS0");
#endif
gIOPCIConfigWorkLoop = IOWorkLoop::workLoop();
}
}
IOWorkLoop * IOPCIBridge::getConfiguratorWorkLoop(void) const
{
return (gIOPCIConfigWorkLoop);
}
IOReturn IOPCIBridge::configOp(IOService * device, uintptr_t op, void * result, void * arg)
{
static OSSet * gIOPCIWaitingPauseSet;
static OSSet * gIOPCIPausedSet;
static OSSet * gIOPCIProbeSet;
IOReturn ret = kIOReturnSuccess;
OSSet * changed;
IOPCIDevice * next;
uint32_t state;
if (!gIOPCIConfigWorkLoop->inGate())
return (gIOPCIConfigWorkLoop->runAction((IOWorkLoop::Action) &IOPCIBridge::configOp,
device, (void *) op, result, arg));
if (!gIOPCIConfigurator)
{
uint32_t debug;
if (getPMRootDomain()->getProperty(kIOPMDeepIdleSupportedKey))
{
if (PE_parse_boot_argn("acpi", &debug, sizeof(debug)) && (0x10000 & debug)) {}
else
gIOPCIFlags |= kIOPCIConfiguratorDeepIdle;
}
#if VERSION_MAJOR >= 13
gIOPCIFlags |= kIOPCIConfiguratorUsePause;
#endif
if (PE_parse_boot_argn("pci", &debug, sizeof(debug)))
gIOPCIFlags |= debug;
if (PE_parse_boot_argn("npci", &debug, sizeof(debug)))
gIOPCIFlags &= ~debug;
gIOPCIACPIPlane = IORegistryEntry::getPlane("IOACPIPlane");
gIOPCITunnelIDKey = OSSymbol::withCStringNoCopy(kIOPCITunnelIDKey);
gIOPCITunnelledKey = OSSymbol::withCStringNoCopy(kIOPCITunnelledKey);
gIOPCITunnelL1EnableKey = OSSymbol::withCStringNoCopy(kIOPCITunnelL1EnableKey);
gIOPCIThunderboltKey = OSSymbol::withCStringNoCopy("PCI-Thunderbolt");
gIOPolledInterfaceActiveKey = OSSymbol::withCStringNoCopy(kIOPolledInterfaceActiveKey);
gIOPCIWaitingPauseSet = OSSet::withCapacity(4);
gIOPCIPausedSet = OSSet::withCapacity(4);
gIOPCIProbeSet = OSSet::withCapacity(4);
gIOPCIConfigurator = OSTypeAlloc(IOPCIConfigurator);
if (!gIOPCIConfigurator || !gIOPCIConfigurator->init(gIOPCIConfigWorkLoop, gIOPCIFlags))
panic("!IOPCIConfigurator");
#if defined(__i386__) || defined(__x86_64__)
if (!gIOPCIMessagedInterruptController)
{
enum {
// LAPIC_DEFAULT_INTERRUPT_BASE (mp.h)
kBaseMessagedInterruptVectors = 0x70,
kNumMessagedInterruptVectors = 0xFF - kBaseMessagedInterruptVectors
};
bool ok = true;
IOPCIMessagedInterruptController *
ic = new IOPCIMessagedInterruptController;
if (ic && !ic->init(kNumMessagedInterruptVectors, kBaseMessagedInterruptVectors))
{
ic->release();
ic = 0;
}
if (ic)
{
ok = ic->reserveVectors(0x7F - kBaseMessagedInterruptVectors, 4);
ok &= ic->reserveVectors(0xD0 - kBaseMessagedInterruptVectors, 16);
}
if (!ic || !ok) panic("IOPCIMessagedInterruptController");
gIOPCIMessagedInterruptController = ic;
}
#endif
#if ACPI_SUPPORT
IOACPIPlatformDevice * acpiDevice;
if (!(acpiDevice = (typeof(acpiDevice)) device->getProvider()->metaCast("IOACPIPlatformDevice")))
panic("host!IOACPIPlatformDevice");
AppleVTD::install(gIOPCIConfigWorkLoop, gIOPCIFlags, acpiDevice, acpiDevice->getACPITableData("DMAR", 0));
#endif
}
if (kConfigOpScan != op)
{
ret = gIOPCIConfigurator->configOp(device, op, result, arg);
if (kIOReturnSuccess != ret) return (ret);
next = (IOPCIDevice *) device;
if (kConfigOpTerminated == op)
{
gIOPCIWaitingPauseSet->removeObject(next);
gIOPCIPausedSet->removeObject(next);
gIOPCIProbeSet->removeObject(next);
}
else if (kConfigOpTestPause == op)
{
if (gIOPCIWaitingPauseSet->setObject(next))
{
next->changePowerStateToPriv(kIOPCIDevicePausedState);
next->powerOverrideOnPriv();
}
}
if (op != kConfigOpPaused) op = 0;
else
{
op = 0;
DLOG("configOp:->pause: %s(0x%qx)\n", device->getName(), device->getRegistryEntryID());
if (gIOPCIWaitingPauseSet->containsObject(device))
{
gIOPCIPausedSet->setObject(device);
gIOPCIWaitingPauseSet->removeObject(device);
if (!gIOPCIWaitingPauseSet->getCount()) op = kConfigOpRealloc;
}
}
}
while (op)
{
ret = gIOPCIConfigurator->configOp(device, op, &changed);
op = 0;
if (kIOReturnSuccess != ret) break;
if (!changed) break;
while ((next = (IOPCIDevice *) changed->getAnyObject()))
{
ret = gIOPCIConfigurator->configOp(next, kConfigOpGetState, &state);
if (kIOReturnSuccess == ret)
{
if (kPCIDeviceStateDead & state)
{
DLOG("configOp:->dead: %s(0x%qx), 0x%x\n", next->getName(), next->getRegistryEntryID(), state);
next->terminate();
}
else if (kPCIDeviceStateRequestPause & state)
{
DLOG("configOp:->pause: %s(0x%qx), 0x%x\n", next->getName(), next->getRegistryEntryID(), state);
if (gIOPCIWaitingPauseSet->setObject(next))
{
next->changePowerStateToPriv(kIOPCIDevicePausedState);
next->powerOverrideOnPriv();
}
}
else
{
DLOG("configOp:->probe: %s(0x%qx), 0x%x\n", next->getName(), next->getRegistryEntryID(), state);
gIOPCIProbeSet->setObject(next);
}
}
changed->removeObject(next);
}
changed->release();
}
if (!gIOPCIWaitingPauseSet->getCount())
{
while ((next = (IOPCIDevice *) gIOPCIPausedSet->getAnyObject()))
{
DLOG("configOp:<-unpause: %s(0x%qx)\n", next->getName(), next->getRegistryEntryID());
if (2 != next->reserved->pauseFlags)
{
next->changePowerStateToPriv(kIOPCIDeviceOnState);
next->powerOverrideOffPriv();
}
next->reserved->pauseFlags = 0;
gIOPCIPausedSet->removeObject(next);
}
while ((next = (IOPCIDevice *) gIOPCIProbeSet->getAnyObject()))
{
DLOG("configOp:<-probe: %s(0x%qx), pm %d\n", next->getName(), next->getRegistryEntryID(), next->reserved->pciPMState);
if (kIOPCIDeviceOnState == next->reserved->pciPMState) deferredProbe(next);
else next->reserved->needsProbe = true;
gIOPCIProbeSet->removeObject(next);
}
}
return (ret);
}
void IOPCIBridge::deferredProbe(IOPCIDevice * device)
{
IOService * client;
IOPCIBridge * bridge;
client = device->copyClientWithCategory(gIODefaultMatchCategoryKey);
if ((bridge = OSDynamicCast(IOPCIBridge, client)))
{
DLOG("configOp:<-probe: %s(0x%qx)\n", device->getName(), device->getRegistryEntryID());
bridge->probeBus(device, bridge->firstBusNum());
}
if (client) client->release();
device->reserved->needsProbe = false;
}
//*********************************************************************************
static const IOPMPowerState gIOPCIPowerStates[kIOPCIDevicePowerStateCount] = {
// version, capabilityFlags, outputPowerCharacter, inputPowerRequirement, staticPower, stateOrder
{ 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 2, 0, kIOPMSoftSleep, kIOPMSoftSleep, 0, 1, 0, 0, 0, 0, 0, 0 },
{ 2, kIOPMPowerOn, kIOPMPowerOn, kIOPMPowerOn, 0, 3, 0, 0, 0, 0, 0, 0 },
{ 2, kIOPMConfigRetained, kIOPMConfigRetained, kIOPMConfigRetained, 0, 2, 0, 0, 0, 0, 0, 0 }
};
static const IOPMPowerState gIOPCIHostPowerStates[kIOPCIDevicePowerStateCount] = {
// version, capabilityFlags, outputPowerCharacter, inputPowerRequirement, staticPower, stateOrder
{ 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 2, 0, kIOPMSoftSleep, kIOPMSoftSleep, 0, 1, 0, 0, 0, 0, 0, 0 },
{ 2, kIOPMPowerOn, kIOPMPowerOn, kIOPMPowerOn, 0, 3, 0, 0, 0, 0, 0, 0 },
{ 2, kIOPMConfigRetained, kIOPMConfigRetained, kIOPMPowerOn, 0, 2, 0, 0, 0, 0, 0, 0 }
};
// version without kIOPCIDevicePausedState
static const IOPMPowerState gIOPCIPowerStatesV1[kIOPCIDevicePowerStateCount - 1] = {
// version, capabilityFlags, outputPowerCharacter, inputPowerRequirement,
{ 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 1, 0, kIOPMSoftSleep, kIOPMSoftSleep, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 1, kIOPMPowerOn, kIOPMPowerOn, kIOPMPowerOn, 0, 0, 0, 0, 0, 0, 0, 0 }
};
//*********************************************************************************
IOReturn
IOPCIRegisterPowerDriver(IOService * service, bool hostbridge)
{
IOReturn ret;
IOPMPowerState * powerStates = hostbridge
? (IOPMPowerState *) gIOPCIHostPowerStates
: (IOPMPowerState *) gIOPCIPowerStates;
ret = service->registerPowerDriver(service, powerStates, kIOPCIDevicePowerStateCount);
if (kIOReturnSuccess != ret)
{
ret = service->registerPowerDriver(service,
(IOPMPowerState *) gIOPCIPowerStatesV1,
arrayCount(gIOPCIPowerStatesV1));
}
return (ret);
}
//*********************************************************************************
// [public] maxCapabilityForDomainState
//
// Finds the highest power state in the array whose input power
// requirement is equal to the input parameter. Where a more intelligent
// decision is possible, override this in the subclassed driver.
//*********************************************************************************
unsigned long
IOPCIBridge::maxCapabilityForDomainState ( IOPMPowerFlags domainState )
{
if (domainState & kIOPMPowerOn) return (kIOPCIDeviceOnState);
if (domainState & kIOPMSoftSleep) return (kIOPCIDeviceDozeState);
if (domainState & kIOPMConfigRetained) return (kIOPCIDevicePausedState);
return (kIOPCIDeviceOffState);
}
//*********************************************************************************
// [public] initialPowerStateForDomainState
//
// Finds the highest power state in the array whose input power
// requirement is equal to the input parameter. Where a more intelligent
// decision is possible, override this in the subclassed driver.
//*********************************************************************************
unsigned long
IOPCIBridge::initialPowerStateForDomainState ( IOPMPowerFlags domainState )
{
if (domainState & kIOPMPowerOn) return (kIOPCIDeviceOnState);
if (domainState & kIOPMSoftSleep) return (kIOPCIDeviceDozeState);
if (domainState & kIOPMConfigRetained) return (kIOPCIDevicePausedState);
return (kIOPCIDeviceOffState);
}
//*********************************************************************************
// [public] powerStateForDomainState
//
// Finds the highest power state in the array whose input power
// requirement is equal to the input parameter. Where a more intelligent
// decision is possible, override this in the subclassed driver.
//*********************************************************************************
unsigned long
IOPCIBridge::powerStateForDomainState ( IOPMPowerFlags domainState )
{
if (domainState & kIOPMPowerOn) return (kIOPCIDeviceOnState);
if (domainState & kIOPMSoftSleep) return (kIOPCIDeviceDozeState);
if (domainState & kIOPMConfigRetained) return (kIOPCIDevicePausedState);
return (kIOPCIDeviceOffState);
}
//*********************************************************************************
bool IOPCIBridge::start( IOService * provider )
{
IOPCIDevice * pciDevice;
if (!super::start(provider))
return (false);
reserved = IONew(ExpansionData, 1);
if (reserved == 0) return (false);
bzero(reserved, sizeof(ExpansionData));
if (!configure(provider)) return (false);
pciDevice = OSDynamicCast(IOPCIDevice, provider);
// initialize superclass variables
PMinit();
// clamp power on
// temporaryPowerClampOn();
// register as controlling driver
IOPCIRegisterPowerDriver(this, !pciDevice);
// join the tree
provider->joinPMtree(this);
pciDevice = OSDynamicCast(IOPCIDevice, provider);
if (!pciDevice)
{
IOReturn
ret = configOp(this, kConfigOpAddHostBridge, 0);
if (kIOReturnSuccess != ret)
return (false);
}
probeBus( provider, firstBusNum() );
if ((kIOPCIConfiguratorDeepIdle & gIOPCIFlags)
&& (!provider->getProperty(kIOPCIHotPlugKey))
&& (!provider->getProperty(kIOPCITunnelLinkChangeKey))
&& !(getChildEntry(gIOServicePlane)))
{
DLOG("%s: no child D3\n", provider->getName());
if (pciDevice
&& pciDevice->hasPCIPowerManagement(kPCIPMCPMESupportFromD3Hot))
{
pciDevice->enablePCIPowerManagement(kPCIPMCSPowerStateD3);
}
powerOverrideOnPriv();
changePowerStateToPriv(kIOPCIDeviceOffState);
changePowerStateTo(kIOPCIDeviceOffState);
}
registerService();
return (true);
}
void IOPCIBridge::stop( IOService * provider )
{
PMstop();
super::stop( provider);
}
void IOPCIBridge::free( void )
{
if (reserved) IODelete(reserved, ExpansionData, 1);
super::free();
}
IOReturn IOPCIBridge::setDeviceASPMBits(IOPCIDevice * device, uint32_t bits)
{
if (!device->reserved->expressCapability) return (kIOReturnUnsupported);
uint16_t control;
control = device->configRead16(device->reserved->expressCapability + 0x10);
control &= ~(kIOPCIExpressASPML0s | kIOPCIExpressASPML1);
control |= bits;
device->configWrite16(device->reserved->expressCapability + 0x10, control);
return (kIOReturnSuccess);
}
IOReturn IOPCIBridge::setDeviceL1PMBits(IOPCIDevice * device, uint32_t bits)
{
OSData * data;
if (!device->reserved->l1pmCapability) return (kIOReturnUnsupported);
if (bits
&& (data = OSDynamicCast(OSData, device->getProperty(kIOPCIExpressL1PMControlKey)))
&& (data->getLength() >= 2*sizeof(uint32_t)))
{
uint32_t * l1bits = (typeof(l1bits)) data->getBytesNoCopy();
device->configWrite32(device->reserved->l1pmCapability + 0x0C, l1bits[1]);
device->configWrite32(device->reserved->l1pmCapability + 0x08, l1bits[0] & bits);
}
else
{
device->configWrite32(device->reserved->l1pmCapability + 0x08, 0);
device->configWrite32(device->reserved->l1pmCapability + 0x0C, 0);
}
return (kIOReturnSuccess);
}
IOReturn IOPCIBridge::setDeviceASPMState(IOPCIDevice * device,
IOService * client, IOOptionBits state)
{
IOOptionBits aspmBits, l1pmBits;
if (state)
{
aspmBits = (device->reserved->aspmCaps & state);
l1pmBits = (device->reserved->l1pmCaps);
}
else
{
aspmBits = l1pmBits = 0;
}
setDeviceL1PMBits(device, l1pmBits);
setDeviceASPMBits(device, aspmBits);
return (kIOReturnSuccess);
}
IOReturn IOPCI2PCIBridge::setDeviceASPMState(IOPCIDevice * device,
IOService * client, IOOptionBits state)
{
uint32_t aspmBits, l1pmBits;
// Need to enable upstream first then downstream, reverse for disable
if (state)
{
l1pmBits = (fBridgeDevice->reserved->l1pmCaps & device->reserved->l1pmCaps);
setDeviceL1PMBits(fBridgeDevice, l1pmBits);
setDeviceL1PMBits(device, l1pmBits);
// L1 and L0s need to be supported on both ends to enable
aspmBits = (state
& fBridgeDevice->reserved->aspmCaps
& device->reserved->aspmCaps
& (kIOPCIExpressASPML0s | kIOPCIExpressASPML1));
setDeviceASPMBits(fBridgeDevice, aspmBits);
setDeviceASPMBits(device, aspmBits);
}
else
{
aspmBits = l1pmBits = 0;
setDeviceL1PMBits(device, l1pmBits);
setDeviceL1PMBits(fBridgeDevice, l1pmBits);
setDeviceASPMBits(device, aspmBits);
setDeviceASPMBits(fBridgeDevice, aspmBits);
}
return (kIOReturnSuccess);
}
IOReturn IOPCIBridge::enableLTR(IOPCIDevice * device, bool enable)
{
return (kIOReturnSuccess);
}
IOReturn IOPCI2PCIBridge::enableLTR(IOPCIDevice * device, bool enable)
{
IOReturn status;
status = fBridgeDevice->enableLTR(device, enable);
if (status != kIOReturnSuccess) return status;
return (device->enableLTR(device, enable));
}
IOReturn
IOPCI2PCIBridge::setTunnelL1Enable(IOPCIDevice * device, IOService * client, bool l1Enable)
{
IOReturn ret;
IOPCIConfigShadow * shadow;
bool was, now;
int32_t incr;
if (l1Enable == device->reserved->tunnelL1Allow) return (kIOReturnSuccess);
shadow = configShadow(device);
DLOG("setTunnelL1Enable(0x%llx) %d->%d\n",
device->getRegistryEntryID(), device->reserved->tunnelL1Allow, l1Enable);
if (!shadow->tunnelRoot) return (kIOReturnUnsupported);
if ((client != device)
&& !device->isChild(client, gIOServicePlane)) return (kIOReturnNotAttached);
device->setProperty(gIOPCITunnelL1EnableKey, l1Enable ? kOSBooleanTrue : kOSBooleanFalse);
IOLockLock(gIOPCIWakeReasonLock);
incr = l1Enable;
incr -= (kTunnelL1Disable != device->reserved->tunnelL1Allow);
device->reserved->tunnelL1Allow = l1Enable;
was = (fTunnelL1EnableCount >= 0);
fTunnelL1EnableCount += incr;
now = (fTunnelL1EnableCount >= 0);
IOLockUnlock(gIOPCIWakeReasonLock);
if (was == now) ret = kIOReturnSuccess;
else
{
if (device == shadow->tunnelRoot)
{
IOOptionBits state = 0;
if (now) state |= kIOPCIExpressASPML1;
DLOG("set tunnel ASPM %s -> %d\n", device->getName(), state);
ret = device->setASPMState(this, state);
}
else
{
ret = fBridgeDevice->setTunnelL1Enable(this, now);
}
}
return (ret);
}
IOReturn IOPCIBridge::setDevicePowerState(IOPCIDevice * device, IOOptionBits options,
unsigned long prevState, unsigned long newState)
{
bool noSave;
noSave = ((kIOPCIConfigShadowVolatile & options)
&& (kOSBooleanFalse == device->getProperty(kIOPMPCIConfigSpaceVolatileKey)));
DLOG("%s[%p]::setDevicePowerState(%ld, %ld, %d)\n", device->getName(), device, prevState, newState, noSave);
if (newState == prevState) return (kIOReturnSuccess);
switch (newState)
{
case kIOPCIDeviceOffState:
if (noSave) break;
saveDeviceState(device, options);
if (kOSBooleanTrue == device->getProperty(kIOPolledInterfaceActiveKey))
{
newState = kIOPCIDeviceOnState;
}
else if (kIOPCIConfiguratorDeepIdle & gIOPCIFlags)
{
newState = kIOPCIDeviceDozeState;
}
device->setPCIPowerState(newState, 0);
break;
case kIOPCIDeviceDozeState:
if (noSave) break;
saveDeviceState(device, options);
device->setPCIPowerState(newState, 0);
break;
case kIOPCIDeviceOnState:
configOp(device, kConfigOpUnpaused, 0);
if (noSave) break;
if (kIOPCIDevicePausedState != prevState)
{
if ((kIOPCIDeviceOffState == prevState)
&& ((kIOPCIClassGraphics == (device->savedConfig[kIOPCIConfigRevisionID >> 2] >> 24))
|| (kIOPCIClassMultimedia == (device->savedConfig[kIOPCIConfigRevisionID >> 2] >> 24))))
{
tunnelsWait(device);
}
}
device->setPCIPowerState(newState, 0);
if (kIOPCIDevicePausedState == prevState) break;
restoreDeviceState(device, options);
break;
case kIOPCIDevicePausedState:
IOLog("pci pause: %s\n", device->getName());
configOp(device, kConfigOpPaused, 0);
if (noSave) break;
device->setPCIPowerState(newState, 0);
restoreDeviceState(device, options);
break;
}
return (kIOReturnSuccess);
}
IOReturn IOPCIBridge::setDevicePowerState( IOPCIDevice * device,
unsigned long whatToDo )
{
// Special for pci/pci-bridge devices -
// kSaveBridgeState(2) to save immediately, kRestoreBridgeState(3) to restore immediately
if (kRestoreBridgeState == whatToDo)
{
if (kSaveBridgeState == gIOAllPCI2PCIBridgeState)
{
restoreMachineState(kMachineRestoreBridges, 0);
restoreMachineState(kMachineRestoreEarlyDevices, 0);
}
gIOAllPCI2PCIBridgeState = kRestoreBridgeState;
gIOPCITunnelWait = gIOPCITunnelSleep;
}
else if (kSaveBridgeState == whatToDo)
{
gIOAllPCI2PCIBridgeState = whatToDo;
gIOPCIWakeCount++;
}
else panic("setDevicePowerState");
return (kIOReturnSuccess);
}
static void IOPCILogDevice(const char * log, IOPCIDevice * device, bool dump)
{
int slen, len, pos;
char * string;
uint32_t offset, data = 0;
slen = 2048;
pos = 0;
string = IONew(char, slen);
if (!string) return;
len = 256;
pos = snprintf(string, slen - pos, "%s : ints(%d) ", log, ml_get_interrupts_enabled());
if (device->getPath(string + pos, &len, gIOServicePlane)) pos += len;
if (dump)
{
pos += snprintf(string + pos, slen - pos, "\n 0 1 2 3 4 5 6 7 8 9 A B C D E F");
for (offset = 0; offset < 256; offset++)
{
if (0 == (offset & 3)) data = device->configRead32(offset);
if (0 == (offset & 15)) pos += snprintf(string + pos, slen - pos, "\n %02X:", offset);
pos += snprintf(string + pos, slen - pos, " %02x", data & 0xff);
data >>= 8;
}
}
pos += snprintf(string + pos, slen - pos, "\n");
DLOG(string);
IODelete(string, char, slen);
}
IOReturn IOPCIBridge::saveDeviceState( IOPCIDevice * device,
IOOptionBits options )
{
IOPCIConfigShadow * shadow;
IOReturn ret;
UInt32 flags;
uint32_t data;
int i;
bool ok;
uint64_t time;
if (!device->savedConfig) return (kIOReturnNotReady);
shadow = configShadow(device);
flags = shadow->flags;
if (kIOPCIConfigShadowValid & flags) return (kIOReturnSuccess);
DLOG("%s::saveDeviceState(0x%x)\n", device->getName(), options);
flags |= kIOPCIConfigShadowValid | options;
shadow->flags = flags;
shadow->restoreCount = 0;
if (device->getProperty(gIOPCITunnelledKey))
{
shadow->tunnelID = device->copyProperty(gIOPCITunnelIDKey, gIOServicePlane);
}
if (shadow->handler)
{
time = mach_absolute_time();
(*shadow->handler)(shadow->handlerRef, kIOMessageDeviceWillPowerOff, device, 3);
time = mach_absolute_time() - time;
absolutetime_to_nanoseconds(time, &time);
DLOG("%s::configHandler(kIOMessageDeviceWillPowerOff) %lld ms\n", device->getName(), time / 1000000ULL);
}
if (kIOPCIConfiguratorLogSaveRestore & gIOPCIFlags)
IOPCILogDevice("save device", device, true);
else if ((kIOPCIConfiguratorIOLog | kIOPCIConfiguratorKPrintf) & gIOPCIFlags)
IOPCILogDevice("save device", device, false);
if (kIOPCIConfigShadowHostBridge & flags) {}
else
{
uint32_t regCount = kIOPCIConfigEPShadowRegs;
if (shadow->bridge)
{
regCount = kIOPCIConfigBridgeShadowRegs;
shadow->bridge->saveBridgeState();
}
for (i = 0; i < regCount; i++)
{
if (kIOPCISaveRegsMask & (1 << i)) device->savedConfig[i] = device->configRead32(i * 4);
}
}
if (device->reserved->l1pmCapability)
{
shadow->savedL1PM0
= device->configRead32(device->reserved->l1pmCapability + 0x08);
shadow->savedL1PM1
= device->configRead32(device->reserved->l1pmCapability + 0x0C);
if (kIOPCIConfigShadowWakeL1PMDisable & shadow->flags) shadow->savedL1PM0 &= ~(0xF);
}