xnu-6153.81.5.tar.gz

[apple/xnu.git] / iokit / Kernel / IOMapper.cpp

diff --git a/iokit/Kernel/IOMapper.cpp b/iokit/Kernel/IOMapper.cpp
index 89a00c9211ecf687050bd64ba2fd0bbc6f2f3919..cbf31f3d452a5c3718c375aa0ca572e7cdda35ff 100644 (file)
--- a/iokit/Kernel/IOMapper.cpp
+++ b/iokit/Kernel/IOMapper.cpp
@@ -2,7 +2,7 @@
  * Copyright (c) 1998-2016 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 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
  * 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


@@ -11,10 +11,10 @@
  * 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.
  * 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.
  * 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,
  * 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,


@@ -22,7 +22,7 @@
  * 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.
  * 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@
  */
 #include <IOKit/IOLib.h>
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 #include <IOKit/IOLib.h>


@@ -30,6 +30,7 @@
 #include <IOKit/IODMACommand.h>
 #include <libkern/c++/OSData.h>
 #include <libkern/OSDebug.h>
 #include <IOKit/IODMACommand.h>
 #include <libkern/c++/OSData.h>
 #include <libkern/OSDebug.h>

+#include <mach_debug/zone_info.h>

 #include "IOKitKernelInternal.h"
 
 __BEGIN_DECLS
 #include "IOKitKernelInternal.h"
 
 __BEGIN_DECLS


@@ -59,161 +60,218 @@ OSMetaClassDefineReservedUnused(IOMapper, 15);
 IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown;
 
 class IOMapperLock {
 IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown;
 
 class IOMapperLock {

-    IOLock *fWaitLock;
+       IOLock *fWaitLock;

 public:
 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); }
+       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;
 
 };
 
 static IOMapperLock sMapperLock;
 

-bool IOMapper::start(IOService *provider)
+bool
+IOMapper::start(IOService *provider)

 {
 {

-    OSObject * obj;
-    if (!super::start(provider))
-        return false;
-
-    if (!initHardware(provider))
-        return false;
-
-    fPageSize = getPageSize();
-
-    if (fIsSystem) { 
-        sMapperLock.lock();
-        IOMapper::gSystem = this;
-        sMapperLock.wakeup(&IOMapper::gSystem);
-        sMapperLock.unlock();
-    }
-
-    if (provider)
-    {
-       obj = provider->getProperty("iommu-id");
-       if (!obj)
-           obj = provider->getProperty("AAPL,phandle");
-       if (obj)
-           setProperty(gIOMapperIDKey, obj);
-    }
-    return true;
+       OSObject * obj;
+       if (!super::start(provider)) {
+               return false;
+       }
+
+       if (!initHardware(provider)) {
+               return false;
+       }
+
+       fPageSize = getPageSize();
+
+       if (fIsSystem) {
+               sMapperLock.lock();
+               IOMapper::gSystem = this;
+               sMapperLock.wakeup(&IOMapper::gSystem);
+               sMapperLock.unlock();
+       }
+
+       if (provider) {
+               obj = provider->getProperty("iommu-id");
+               if (!obj) {
+                       obj = provider->getProperty("AAPL,phandle");
+               }
+               if (obj) {
+                       setProperty(gIOMapperIDKey, obj);
+               }
+       }
+       return true;

 }
 
 }
 

-void IOMapper::free()
+void
+IOMapper::free()

 {
 {

-    super::free();
+       super::free();

 }
 
 }
 

-void IOMapper::setMapperRequired(bool hasMapper)
+void
+IOMapper::setMapperRequired(bool hasMapper)

 {
 {

-    if (hasMapper)
-        IOMapper::gSystem = (IOMapper *) kHasMapper;
-    else {
-        sMapperLock.lock();
-        IOMapper::gSystem = (IOMapper *) kNoMapper;
-        sMapperLock.unlock();
-        sMapperLock.wakeup(&IOMapper::gSystem);
-    }
+       if (hasMapper) {
+               IOMapper::gSystem = (IOMapper *) kHasMapper;
+       } else {
+               sMapperLock.lock();
+               IOMapper::gSystem = (IOMapper *) kNoMapper;
+               sMapperLock.unlock();
+               sMapperLock.wakeup(&IOMapper::gSystem);
+       }

 }
 
 }
 

-void IOMapper::waitForSystemMapper()
+void
+IOMapper::waitForSystemMapper()

 {
 {

-    sMapperLock.lock();
-    while ((uintptr_t) IOMapper::gSystem & kWaitMask)
-    {
+       sMapperLock.lock();
+       while ((uintptr_t) IOMapper::gSystem & kWaitMask) {

                OSReportWithBacktrace("waitForSystemMapper");
                OSReportWithBacktrace("waitForSystemMapper");

-        sMapperLock.sleep(&IOMapper::gSystem);
-    }
-    sMapperLock.unlock();
+               sMapperLock.sleep(&IOMapper::gSystem);
+       }
+       sMapperLock.unlock();

 }
 
 }
 

-IOMapper * IOMapper::copyMapperForDevice(IOService * device)
+IOMapper *
+IOMapper::copyMapperForDevice(IOService * device)

 {
 {

-    return copyMapperForDeviceWithIndex(device, 0);
+       return copyMapperForDeviceWithIndex(device, 0);

 }
 
 }
 

-IOMapper * IOMapper::copyMapperForDeviceWithIndex(IOService * device, unsigned int index)
+IOMapper *
+IOMapper::copyMapperForDeviceWithIndex(IOService * device, unsigned int index)

 {
 {

-    OSData *data;
-    OSObject * obj;
-    IOMapper * mapper = NULL;
-    OSDictionary * matching;
-    
-    obj = device->copyProperty("iommu-parent");
-    if (!obj)
-        return (NULL);
-
-    if ((mapper = OSDynamicCast(IOMapper, obj)))
-        return (mapper);
-
-    if ((data = OSDynamicCast(OSData, obj)))
-    {
-        if (index >= data->getLength() / sizeof(UInt32))
-            goto done;
-        
-        data = OSData::withBytesNoCopy((UInt32 *)data->getBytesNoCopy() + index, sizeof(UInt32));
-        if (!data)
-            goto done;
-
-        matching = IOService::propertyMatching(gIOMapperIDKey, data);
-        data->release();
-    }
-    else
-        matching = IOService::propertyMatching(gIOMapperIDKey, obj);
-
-    if (matching)
-    {
-        mapper = OSDynamicCast(IOMapper, IOService::waitForMatchingService(matching));
-            matching->release();
-    }
+       OSData *data;
+       OSObject * obj;
+       IOMapper * mapper = NULL;
+       OSDictionary * matching;
+
+       obj = device->copyProperty("iommu-parent");
+       if (!obj) {
+               return NULL;
+       }
+
+       if ((mapper = OSDynamicCast(IOMapper, obj))) {
+               goto found;
+       }
+
+       if ((data = OSDynamicCast(OSData, obj))) {
+               if (index >= data->getLength() / sizeof(UInt32)) {
+                       goto done;
+               }
+
+               data = OSData::withBytesNoCopy((UInt32 *)data->getBytesNoCopy() + index, sizeof(UInt32));
+               if (!data) {
+                       goto done;
+               }
+
+               matching = IOService::propertyMatching(gIOMapperIDKey, data);
+               data->release();
+       } else {
+               matching = IOService::propertyMatching(gIOMapperIDKey, obj);
+       }
+
+       if (matching) {
+               mapper = OSDynamicCast(IOMapper, IOService::waitForMatchingService(matching));
+               matching->release();
+       }

 
 done:
 
 done:

-    if (obj)
-            obj->release();
-    return (mapper);
+       if (obj) {
+               obj->release();
+       }
+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
 }
 
 __BEGIN_DECLS
 
 // These are C accessors to the system mapper for non-IOKit clients

-ppnum_t IOMapperIOVMAlloc(unsigned pages)
+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) return (atop_64(dmaAddress));
-    return (0);
+       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) {
+               return atop_64(dmaAddress);
+       }
+       return 0;

 }
 
 }
 

-void IOMapperIOVMFree(ppnum_t addr, unsigned pages)
+void
+IOMapperIOVMFree(ppnum_t addr, unsigned pages)

 {
 {

-    if (IOMapper::gSystem)
-    {
-        IOMapper::gSystem->iovmUnmapMemory(NULL, NULL, ptoa_64(addr), ptoa_64(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)
+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);
+       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;

 }
 
 /////////////////////////////////////////////////////////////////////////////
 }
 
 /////////////////////////////////////////////////////////////////////////////


@@ -226,100 +284,108 @@ ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page)
 
 #include <machine/machine_routines.h>
 
 
 #include <machine/machine_routines.h>
 

-UInt8 IOMappedRead8(IOPhysicalAddress address)
+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);
+       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)
+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);
+       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)
+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);
+       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)
+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);
+       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)
+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);
+       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)
+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);
+       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)
+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);
+       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)
+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);
+       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
 }
 
 __END_DECLS