X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/0c530ab8987f0ae6a1a3d9284f40182b88852816..HEAD:/iokit/Kernel/IOMapper.cpp diff --git a/iokit/Kernel/IOMapper.cpp b/iokit/Kernel/IOMapper.cpp index f2f0633c3..c2f764834 100644 --- a/iokit/Kernel/IOMapper.cpp +++ b/iokit/Kernel/IOMapper.cpp @@ -1,29 +1,40 @@ /* - * Copyright (c) 1998-2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 1998-2016 Apple 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 #include +#include #include - -#include "IOCopyMapper.h" +#include +#include +#include "IOKitKernelInternal.h" __BEGIN_DECLS extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va); @@ -32,7 +43,7 @@ __END_DECLS #define super IOService OSDefineMetaClassAndAbstractStructors(IOMapper, IOService); -OSMetaClassDefineReservedUsed(IOMapper, 0); +OSMetaClassDefineReservedUnused(IOMapper, 0); OSMetaClassDefineReservedUnused(IOMapper, 1); OSMetaClassDefineReservedUnused(IOMapper, 2); OSMetaClassDefineReservedUnused(IOMapper, 3); @@ -52,183 +63,219 @@ OSMetaClassDefineReservedUnused(IOMapper, 15); IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown; class IOMapperLock { - IOLock *fWaitLock; + 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); }; + 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) +bool +IOMapper::start(IOService *provider) { - if (!super::start(provider)) - return false; - - if (!initHardware(provider)) - return false; - - if (fIsSystem) { - sMapperLock.lock(); - IOMapper::gSystem = this; - sMapperLock.wakeup(&IOMapper::gSystem); - sMapperLock.unlock(); - } - - return true; + OSSharedPtr 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; } -bool IOMapper::allocTable(IOByteCount size) +void +IOMapper::free() { - assert(!fTable); - - fTableSize = size; - fTableHandle = NewARTTable(size, &fTable, &fTablePhys); - return fTableHandle != 0; + super::free(); } -void IOMapper::free() +void +IOMapper::setMapperRequired(bool hasMapper) { - if (fTableHandle) { - FreeARTTable(fTableHandle, fTableSize); - fTableHandle = 0; - } - - super::free(); + if (hasMapper) { + IOMapper::gSystem = (IOMapper *) kHasMapper; + } else { + sMapperLock.lock(); + IOMapper::gSystem = (IOMapper *) kNoMapper; + sMapperLock.unlock(); + sMapperLock.wakeup(&IOMapper::gSystem); + } } -void IOMapper::setMapperRequired(bool hasMapper) +void +IOMapper::waitForSystemMapper() { - if (hasMapper) - IOMapper::gSystem = (IOMapper *) kHasMapper; - else { - sMapperLock.lock(); - IOMapper::gSystem = (IOMapper *) kNoMapper; - sMapperLock.unlock(); - sMapperLock.wakeup(&IOMapper::gSystem); - } + sMapperLock.lock(); + while ((uintptr_t) IOMapper::gSystem & kWaitMask) { + OSReportWithBacktrace("waitForSystemMapper"); + sMapperLock.sleep(&IOMapper::gSystem); + } + sMapperLock.unlock(); } -void IOMapper::waitForSystemMapper() +OSSharedPtr +IOMapper::copyMapperForDevice(IOService * device) { - sMapperLock.lock(); - while ((vm_address_t) IOMapper::gSystem & kWaitMask) - sMapperLock.sleep(&IOMapper::gSystem); - sMapperLock.unlock(); + return copyMapperForDeviceWithIndex(device, 0); } -void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset, - ppnum_t *pageList, IOItemCount pageCount) +OSSharedPtr +IOMapper::copyMapperForDeviceWithIndex(IOService * device, unsigned int index) { - while (pageCount--) - iovmInsert(addr, offset++, *pageList++); -} - -void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset, - upl_page_info_t *pageList, IOItemCount pageCount) -{ - for (IOItemCount i = 0; i < pageCount; i++) - iovmInsert(addr, offset + i, pageList[i].phys_addr); -} - -OSData * IOMapper:: -NewARTTable(IOByteCount size, void ** virtAddrP, ppnum_t *physAddrP) -{ - if (!virtAddrP || !physAddrP) - return 0; - - kern_return_t kr; - vm_address_t address; - - size = round_page_32(size); - kr = kmem_alloc_contig(kernel_map, &address, size, PAGE_MASK, 0); - if (kr) - return 0; - - ppnum_t pagenum = pmap_find_phys(kernel_pmap, (addr64_t) address); - if (pagenum) - *physAddrP = pagenum; - else { - FreeARTTable((OSData *) address, size); - address = 0; - } - - *virtAddrP = (void *) address; - - return (OSData *) address; -} - -void IOMapper::FreeARTTable(OSData *artHandle, IOByteCount size) -{ - vm_address_t address = (vm_address_t) artHandle; - - size = round_page_32(size); - kmem_free(kernel_map, address, size); // Just panic if address is 0 -} - -bool IOMapper::getBypassMask(addr64_t *maskP) const -{ - return false; + OSSharedPtr data; + OSSharedPtr obj; + OSSharedPtr mapper; + OSSharedPtr matching; + + obj = device->copyProperty("iommu-parent"); + if (!obj) { + return NULL; + } + + if ((mapper = OSDynamicPtrCast(obj))) { + goto found; + } + + if ((data = OSDynamicPtrCast(obj))) { + if (index >= data->getLength() / sizeof(UInt32)) { + goto found; + } + + data = OSData::withBytesNoCopy((UInt32 *)data->getBytesNoCopy() + index, sizeof(UInt32)); + if (!data) { + goto found; + } + + matching = IOService::propertyMatching(gIOMapperIDKey, data.get()); + } else { + matching = IOService::propertyMatching(gIOMapperIDKey, obj.get()); + } + + if (matching) { + mapper = OSDynamicPtrCast(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) -{ - IOMapper::checkForSystemMapper(); - - if (IOMapper::gSystem) - return IOMapper::gSystem->iovmAlloc((IOItemCount) pages); - else - return 0; -} - -void IOMapperIOVMFree(ppnum_t addr, unsigned pages) -{ - if (IOMapper::gSystem) - IOMapper::gSystem->iovmFree(addr, (IOItemCount) pages); -} - -ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page) +ppnum_t +IOMapperIOVMAlloc(unsigned pages) { - if (IOMapper::gSystem) { - IOMapper::gSystem->iovmInsert(addr, (IOItemCount) offset, page); - return addr + offset; - } - else - return page; + 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 IOMapperInsertPPNPages(ppnum_t addr, unsigned offset, - ppnum_t *pageList, unsigned pageCount) +void +IOMapperIOVMFree(ppnum_t addr, unsigned pages) { - if (!IOMapper::gSystem) - panic("IOMapperInsertPPNPages no system mapper"); - else - assert(!((vm_address_t) IOMapper::gSystem & 3)); - - IOMapper::gSystem-> - iovmInsert(addr, (IOItemCount) offset, pageList, pageCount); + if (IOMapper::gSystem) { + IOMapper::gSystem->iovmUnmapMemory(NULL, NULL, ptoa_64(addr), ptoa_64(pages)); + } } -void IOMapperInsertUPLPages(ppnum_t addr, unsigned offset, - upl_page_info_t *pageList, unsigned pageCount) +ppnum_t +IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page) { - if (!IOMapper::gSystem) - panic("IOMapperInsertUPLPages no system mapper"); - else - assert(!((vm_address_t) IOMapper::gSystem & 3)); - - IOMapper::gSystem->iovmInsert(addr, - (IOItemCount) offset, - pageList, - (IOItemCount) pageCount); + 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; } ///////////////////////////////////////////////////////////////////////////// @@ -241,120 +288,108 @@ void IOMapperInsertUPLPages(ppnum_t addr, unsigned offset, #include -UInt8 IOMappedRead8(IOPhysicalAddress address) -{ - IOMapper::checkForSystemMapper(); - - if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(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->mapAddr(address); - return (UInt16) ml_phys_read_half_64(addr); - } - else - return (UInt16) ml_phys_read_half((vm_offset_t) address); -} - -UInt32 IOMappedRead32(IOPhysicalAddress address) +UInt8 +IOMappedRead8(IOPhysicalAddress address) { - IOMapper::checkForSystemMapper(); - - if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(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 (UInt8) ml_phys_read_byte_64(addr); + } else { + return (UInt8) ml_phys_read_byte((vm_offset_t) address); + } } -UInt64 IOMappedRead64(IOPhysicalAddress address) +UInt16 +IOMappedRead16(IOPhysicalAddress address) { - IOMapper::checkForSystemMapper(); - - if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(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 (UInt16) ml_phys_read_half_64(addr); + } else { + return (UInt16) ml_phys_read_half((vm_offset_t) address); + } } -void IOMappedWrite8(IOPhysicalAddress address, UInt8 value) +UInt32 +IOMappedRead32(IOPhysicalAddress address) { - IOMapper::checkForSystemMapper(); - - if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(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); + return (UInt32) ml_phys_read_word_64(addr); + } else { + return (UInt32) ml_phys_read_word((vm_offset_t) address); + } } -void IOMappedWrite16(IOPhysicalAddress address, UInt16 value) +UInt64 +IOMappedRead64(IOPhysicalAddress address) { - IOMapper::checkForSystemMapper(); - - if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(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); + return (UInt64) ml_phys_read_double_64(addr); + } else { + return (UInt64) ml_phys_read_double((vm_offset_t) address); + } } -void IOMappedWrite32(IOPhysicalAddress address, UInt32 value) +void +IOMappedWrite8(IOPhysicalAddress address, UInt8 value) { - IOMapper::checkForSystemMapper(); - - if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(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_byte_64(addr, value); + } else { + ml_phys_write_byte((vm_offset_t) address, value); + } } -void IOMappedWrite64(IOPhysicalAddress address, UInt64 value) +void +IOMappedWrite16(IOPhysicalAddress address, UInt16 value) { - IOMapper::checkForSystemMapper(); - - if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(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_half_64(addr, value); + } else { + ml_phys_write_half((vm_offset_t) address, value); + } } -mach_vm_address_t IOMallocPhysical(mach_vm_size_t size, mach_vm_address_t mask) +void +IOMappedWrite32(IOPhysicalAddress address, UInt32 value) { - mach_vm_address_t address = 0; - if (gIOCopyMapper) - { - address = ptoa_64(gIOCopyMapper->iovmAlloc(atop_64(round_page(size)))); - } - - return (address); + 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 IOFreePhysical(mach_vm_address_t address, mach_vm_size_t size) +void +IOMappedWrite64(IOPhysicalAddress address, UInt64 value) { - if (gIOCopyMapper) - { - gIOCopyMapper->iovmFree(atop_64(address), atop_64(round_page(size))); - } + 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