X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/89b3af67bb32e691275bf6fa803d1834b2284115..9d749ea394c01276fa19e397e70f46858e849c76:/iokit/Kernel/IOMapper.cpp?ds=sidebyside diff --git a/iokit/Kernel/IOMapper.cpp b/iokit/Kernel/IOMapper.cpp index 56d412bf3..7f944e831 100644 --- a/iokit/Kernel/IOMapper.cpp +++ b/iokit/Kernel/IOMapper.cpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 1998-2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 1998-2016 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -27,9 +27,11 @@ */ #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); @@ -38,7 +40,7 @@ __END_DECLS #define super IOService OSDefineMetaClassAndAbstractStructors(IOMapper, IOService); -OSMetaClassDefineReservedUsed(IOMapper, 0); +OSMetaClassDefineReservedUnused(IOMapper, 0); OSMetaClassDefineReservedUnused(IOMapper, 1); OSMetaClassDefineReservedUnused(IOMapper, 2); OSMetaClassDefineReservedUnused(IOMapper, 3); @@ -60,25 +62,28 @@ IOMapper * IOMapper::gSystem = (IOMapper *) IOMapper::kUnknown; class IOMapperLock { IOLock *fWaitLock; public: - IOMapperLock() { fWaitLock = IOLockAlloc(); }; - ~IOMapperLock() { IOLockFree(fWaitLock); }; + 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); }; + 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) { + OSObject * obj; if (!super::start(provider)) return false; if (!initHardware(provider)) return false; + fPageSize = getPageSize(); + if (fIsSystem) { sMapperLock.lock(); IOMapper::gSystem = this; @@ -86,25 +91,19 @@ bool IOMapper::start(IOService *provider) sMapperLock.unlock(); } + if (provider) + { + obj = provider->getProperty("iommu-id"); + if (!obj) + obj = provider->getProperty("AAPL,phandle"); + if (obj) + setProperty(gIOMapperIDKey, obj); + } return true; } -bool IOMapper::allocTable(IOByteCount size) -{ - assert(!fTable); - - fTableSize = size; - fTableHandle = NewARTTable(size, &fTable, &fTablePhys); - return fTableHandle != 0; -} - void IOMapper::free() { - if (fTableHandle) { - FreeARTTable(fTableHandle, fTableSize); - fTableHandle = 0; - } - super::free(); } @@ -123,63 +122,73 @@ void IOMapper::setMapperRequired(bool hasMapper) void IOMapper::waitForSystemMapper() { sMapperLock.lock(); - while ((vm_address_t) IOMapper::gSystem & kWaitMask) + while ((uintptr_t) IOMapper::gSystem & kWaitMask) + { + OSReportWithBacktrace("waitForSystemMapper"); sMapperLock.sleep(&IOMapper::gSystem); + } sMapperLock.unlock(); } -void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset, - ppnum_t *pageList, IOItemCount pageCount) -{ - while (pageCount--) - iovmInsert(addr, offset++, *pageList++); -} - -void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset, - upl_page_info_t *pageList, IOItemCount pageCount) +IOMapper * IOMapper::copyMapperForDevice(IOService * device) { - for (IOItemCount i = 0; i < pageCount; i++) - iovmInsert(addr, offset + i, pageList[i].phys_addr); + return copyMapperForDeviceWithIndex(device, 0); } -OSData * IOMapper:: -NewARTTable(IOByteCount size, void ** virtAddrP, ppnum_t *physAddrP) +IOMapper * IOMapper::copyMapperForDeviceWithIndex(IOService * device, unsigned int index) { - if (!virtAddrP || !physAddrP) - return 0; + OSData *data; + OSObject * obj; + IOMapper * mapper = NULL; + OSDictionary * matching; + + obj = device->copyProperty("iommu-parent"); + if (!obj) return (NULL); - kern_return_t kr; - vm_address_t address; + if ((mapper = OSDynamicCast(IOMapper, obj))) goto found; - size = round_page_32(size); - kr = kmem_alloc_contig(kernel_map, &address, size, PAGE_MASK, 0); - if (kr) - return 0; + 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; - ppnum_t pagenum = pmap_find_phys(kernel_pmap, (addr64_t) address); - if (pagenum) - *physAddrP = pagenum; - else { - FreeARTTable((OSData *) address, size); - address = 0; + matching = IOService::propertyMatching(gIOMapperIDKey, data); + data->release(); } + else + matching = IOService::propertyMatching(gIOMapperIDKey, obj); - *virtAddrP = (void *) address; - - return (OSData *) address; -} - -void IOMapper::FreeARTTable(OSData *artHandle, IOByteCount size) -{ - vm_address_t address = (vm_address_t) artHandle; + if (matching) + { + mapper = OSDynamicCast(IOMapper, IOService::waitForMatchingService(matching)); + matching->release(); + } - size = round_page_32(size); - kmem_free(kernel_map, address, size); // Just panic if address is 0 -} +done: + 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); + } + } -bool IOMapper::getBypassMask(addr64_t *maskP) const -{ - return false; + return (mapper); } __BEGIN_DECLS @@ -187,54 +196,40 @@ __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) - return IOMapper::gSystem->iovmAlloc((IOItemCount) pages); - else - return 0; + { + 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) { if (IOMapper::gSystem) - IOMapper::gSystem->iovmFree(addr, (IOItemCount) pages); -} - -ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page) -{ - if (IOMapper::gSystem) { - IOMapper::gSystem->iovmInsert(addr, (IOItemCount) offset, page); - return addr + offset; + { + IOMapper::gSystem->iovmUnmapMemory(NULL, NULL, ptoa_64(addr), ptoa_64(pages)); } - else - return page; -} - -void IOMapperInsertPPNPages(ppnum_t addr, unsigned offset, - ppnum_t *pageList, unsigned pageCount) -{ - if (!IOMapper::gSystem) - panic("IOMapperInsertPPNPages no system mapper"); - else - assert(!((vm_address_t) IOMapper::gSystem & 3)); - - IOMapper::gSystem-> - iovmInsert(addr, (IOItemCount) offset, pageList, pageCount); } -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); } ///////////////////////////////////////////////////////////////////////////// @@ -252,7 +247,7 @@ UInt8 IOMappedRead8(IOPhysicalAddress address) IOMapper::checkForSystemMapper(); if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(address); + addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address); return (UInt8) ml_phys_read_byte_64(addr); } else @@ -264,7 +259,7 @@ UInt16 IOMappedRead16(IOPhysicalAddress address) IOMapper::checkForSystemMapper(); if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(address); + addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address); return (UInt16) ml_phys_read_half_64(addr); } else @@ -276,7 +271,7 @@ UInt32 IOMappedRead32(IOPhysicalAddress address) IOMapper::checkForSystemMapper(); if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(address); + addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address); return (UInt32) ml_phys_read_word_64(addr); } else @@ -288,7 +283,7 @@ UInt64 IOMappedRead64(IOPhysicalAddress address) IOMapper::checkForSystemMapper(); if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(address); + addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address); return (UInt64) ml_phys_read_double_64(addr); } else @@ -300,7 +295,7 @@ void IOMappedWrite8(IOPhysicalAddress address, UInt8 value) IOMapper::checkForSystemMapper(); if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(address); + addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address); ml_phys_write_byte_64(addr, value); } else @@ -312,7 +307,7 @@ void IOMappedWrite16(IOPhysicalAddress address, UInt16 value) IOMapper::checkForSystemMapper(); if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(address); + addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address); ml_phys_write_half_64(addr, value); } else @@ -324,7 +319,7 @@ void IOMappedWrite32(IOPhysicalAddress address, UInt32 value) IOMapper::checkForSystemMapper(); if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(address); + addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address); ml_phys_write_word_64(addr, value); } else @@ -336,31 +331,11 @@ void IOMappedWrite64(IOPhysicalAddress address, UInt64 value) IOMapper::checkForSystemMapper(); if (IOMapper::gSystem) { - addr64_t addr = IOMapper::gSystem->mapAddr(address); + addr64_t addr = IOMapper::gSystem->mapToPhysicalAddress(address); ml_phys_write_double_64(addr, value); } else ml_phys_write_double((vm_offset_t) address, value); } -mach_vm_address_t IOMallocPhysical(mach_vm_size_t size, mach_vm_address_t mask) -{ - mach_vm_address_t address = 0; - if (gIOCopyMapper) - { - address = ptoa_64(gIOCopyMapper->iovmAlloc(atop_64(round_page(size)))); - } - - return (address); -} - -void IOFreePhysical(mach_vm_address_t address, mach_vm_size_t size) -{ - if (gIOCopyMapper) - { - gIOCopyMapper->iovmFree(atop_64(address), atop_64(round_page(size))); - } -} - - __END_DECLS