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GenericUSBXHCIUserClient.cpp
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219 lines (201 loc) · 5.9 KB
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//
// GenericUSBXHCIUserClient.cpp
// GenericUSBXHCI
//
// Created by Zenith432 on February 3rd 2012.
// Copyright (c) 2013 Zenith432. All rights reserved.
//
#include "GenericUSBXHCIUserClient.h"
#include "GenericUSBXHCI.h"
#include <IOKit/IOLib.h>
#include <IOKit/IOBufferMemoryDescriptor.h>
#define CLASS GenericUSBXHCIUserClient
#define super IOUserClient
OSDefineMetaClassAndFinalStructors(GenericUSBXHCIUserClient, IOUserClient);
#pragma mark -
#pragma mark Helpers
#pragma mark -
struct BufferedPrintSink : PrintSink
{
void* buffer;
size_t position;
size_t capacity;
};
static
void BufferedPrintSinkFunction(struct PrintSink* sink, const char* format, va_list args)
{
int chars;
BufferedPrintSink* _sink = static_cast<BufferedPrintSink*>(sink);
if (!_sink || !_sink->buffer || _sink->position >= _sink->capacity)
return;
chars = vsnprintf(static_cast<char*>(_sink->buffer) + _sink->position,
_sink->capacity - _sink->position,
format, args);
_sink->position += chars;
}
static
IOReturn MakeMemoryAndPrintSink(size_t capacity, IOBufferMemoryDescriptor** pMd, IOMemoryMap** pMap, BufferedPrintSink* pSink)
{
IOBufferMemoryDescriptor* md;
IOMemoryMap* map;
IOReturn rc;
md = IOBufferMemoryDescriptor::inTaskWithOptions(0,
kIOMemoryPageable | kIODirectionIn,
capacity);
if (!md)
return kIOReturnNoMemory;
rc = md->prepare();
if (rc != kIOReturnSuccess) {
md->release();
return rc;
}
map = md->createMappingInTask(kernel_task, 0U, kIOMapAnywhere);
if (!map) {
md->complete();
md->release();
return kIOReturnVMError;
}
*pMd = md;
*pMap = map;
bzero(pSink, sizeof *pSink);
pSink->printer = &BufferedPrintSinkFunction;
pSink->buffer = reinterpret_cast<void*>(map->getVirtualAddress());
pSink->position = 0U;
pSink->capacity = capacity;
return kIOReturnSuccess;
}
#pragma mark -
#pragma mark User Client
#pragma mark -
IOReturn CLASS::clientClose(void)
{
if (!terminate())
IOLog("GenericUSBXHCIUserClient::%s: terminate failed.\n", __FUNCTION__);
return kIOReturnSuccess;
}
static
IOReturn GatedPrintCapRegs(OSObject* owner, void* pSink, void*, void*, void*)
{
static_cast<GenericUSBXHCI*>(owner)->PrintCapRegs(static_cast<PrintSink*>(pSink));
return kIOReturnSuccess;
}
static
IOReturn GatedPrintRuntimeRegs(OSObject* owner, void* pSink, void*, void*, void*)
{
static_cast<GenericUSBXHCI*>(owner)->PrintRuntimeRegs(static_cast<PrintSink*>(pSink));
return kIOReturnSuccess;
}
static
IOReturn GatedPrintSlots(OSObject* owner, void* pSink, void*, void*, void*)
{
static_cast<GenericUSBXHCI*>(owner)->PrintSlots(static_cast<PrintSink*>(pSink));
return kIOReturnSuccess;
}
static
IOReturn GatedPrintEndpoints(OSObject* owner, void* pSink, void* slot, void*, void*)
{
static_cast<GenericUSBXHCI*>(owner)->PrintEndpoints(static_cast<uint8_t>(reinterpret_cast<size_t>(slot)),
static_cast<PrintSink*>(pSink));
return kIOReturnSuccess;
}
static
IOReturn GatedPrintRootHubPortBandwidth(OSObject* owner, void* pSink, void*, void*, void*)
{
static_cast<GenericUSBXHCI*>(owner)->PrintRootHubPortBandwidth(static_cast<PrintSink*>(pSink));
return kIOReturnSuccess;
}
extern "C" void ListOptions(PrintSink* pSink);
IOReturn CLASS::clientMemoryForType(UInt32 type, IOOptionBits* options, IOMemoryDescriptor** memory)
{
IOBufferMemoryDescriptor* md;
IOMemoryMap* kernelMap;
GenericUSBXHCI* provider;
BufferedPrintSink sink;
IOReturn ret = kIOReturnUnsupported;
*options = 0U;
*memory = 0;
switch (type & 255U) {
case kGUXCapRegsDump:
provider = OSDynamicCast(GenericUSBXHCI, getProvider());
if (!provider)
break;
ret = MakeMemoryAndPrintSink(PAGE_SIZE, &md, &kernelMap, &sink);
if (ret != kIOReturnSuccess)
break;
provider->getWorkLoop()->runAction(GatedPrintCapRegs, provider, &sink);
kernelMap->release();
md->complete();
*options = kIOMapReadOnly;
*memory = md;
ret = kIOReturnSuccess;
break;
case kGUXRunRegsDump:
provider = OSDynamicCast(GenericUSBXHCI, getProvider());
if (!provider)
break;
ret = MakeMemoryAndPrintSink(PAGE_SIZE, &md, &kernelMap, &sink);
if (ret != kIOReturnSuccess)
break;
provider->getWorkLoop()->runAction(GatedPrintRuntimeRegs, provider, &sink);
kernelMap->release();
md->complete();
*options = kIOMapReadOnly;
*memory = md;
ret = kIOReturnSuccess;
break;
case kGUXSlotsDump:
provider = OSDynamicCast(GenericUSBXHCI, getProvider());
if (!provider)
break;
ret = MakeMemoryAndPrintSink(PAGE_SIZE, &md, &kernelMap, &sink);
if (ret != kIOReturnSuccess)
break;
provider->getWorkLoop()->runAction(GatedPrintSlots, provider, &sink);
kernelMap->release();
md->complete();
*options = kIOMapReadOnly;
*memory = md;
ret = kIOReturnSuccess;
break;
case kGUXEndpointsDump:
provider = OSDynamicCast(GenericUSBXHCI, getProvider());
if (!provider)
break;
ret = MakeMemoryAndPrintSink(PAGE_SIZE, &md, &kernelMap, &sink);
if (ret != kIOReturnSuccess)
break;
provider->getWorkLoop()->runAction(GatedPrintEndpoints, provider, &sink, reinterpret_cast<void*>((type >> 8U) & 255U));
kernelMap->release();
md->complete();
*options = kIOMapReadOnly;
*memory = md;
ret = kIOReturnSuccess;
break;
case kGUXBandwidthDump:
provider = OSDynamicCast(GenericUSBXHCI, getProvider());
if (!provider)
break;
ret = MakeMemoryAndPrintSink(PAGE_SIZE, &md, &kernelMap, &sink);
if (ret != kIOReturnSuccess)
break;
provider->getWorkLoop()->runAction(GatedPrintRootHubPortBandwidth, provider, &sink);
kernelMap->release();
md->complete();
*options = kIOMapReadOnly;
*memory = md;
ret = kIOReturnSuccess;
break;
case kGUXOptionsDump:
ret = MakeMemoryAndPrintSink(PAGE_SIZE, &md, &kernelMap, &sink);
if (ret != kIOReturnSuccess)
break;
ListOptions(&sink);
kernelMap->release();
md->complete();
*options = kIOMapReadOnly;
*memory = md;
ret = kIOReturnSuccess;
break;
}
return ret;
}