X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/ff6e181ae92fc6f1e89841290f461d1f2f9badd9..c6bf4f310a33a9262d455ea4d3f0630b1255e3fe:/iokit/Kernel/IOMapper.cpp diff --git a/iokit/Kernel/IOMapper.cpp b/iokit/Kernel/IOMapper.cpp index a5cf2be35..cbf31f3d4 100644 --- a/iokit/Kernel/IOMapper.cpp +++ b/iokit/Kernel/IOMapper.cpp @@ -1,15 +1,20 @@ /* - * Copyright (c) 1998-2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 1998-2016 Apple Inc. All rights reserved. + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * @APPLE_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. Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. - * + * 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, @@ -17,12 +22,20 @@ * 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_LICENSE_HEADER_END@ + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #include #include +#include #include +#include +#include +#include "IOKitKernelInternal.h" + +__BEGIN_DECLS +extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va); +__END_DECLS #define super IOService OSDefineMetaClassAndAbstractStructors(IOMapper, IOService); @@ -47,237 +60,218 @@ 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) -{ - 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; -} - -bool IOMapper::allocTable(IOByteCount size) +bool +IOMapper::start(IOService *provider) { - assert(!fTable); - - fTableSize = size; - fTableHandle = NewARTTable(size, &fTable, &fTablePhys); - return fTableHandle != 0; + 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() { - if (fTableHandle) { - FreeARTTable(fTableHandle, fTableSize); - fTableHandle = 0; - } - - 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 ((vm_address_t) IOMapper::gSystem & kWaitMask) - sMapperLock.sleep(&IOMapper::gSystem); - sMapperLock.unlock(); + sMapperLock.lock(); + 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) +IOMapper * +IOMapper::copyMapperForDevice(IOService * device) { - while (pageCount--) - iovmInsert(addr, offset++, *pageList++); + return copyMapperForDeviceWithIndex(device, 0); } -void IOMapper::iovmInsert(ppnum_t addr, IOItemCount offset, - upl_page_info_t *pageList, IOItemCount pageCount) +IOMapper * +IOMapper::copyMapperForDeviceWithIndex(IOService * device, unsigned int index) { - for (IOItemCount i = 0; i < pageCount; i++) - iovmInsert(addr, offset + i, pageList[i].phys_addr); -} - -struct ARTTableData { - void *v; - upl_t u[0]; -}; -#define getARTDataP(data) ((ARTTableData *) (data)->getBytesNoCopy()) - -OSData * -IOMapper::NewARTTable(IOByteCount size, - void ** virtAddrP, ppnum_t *physAddrP) -{ - OSData *ret; - kern_return_t kr; - vm_address_t startUpl; - ARTTableData *dataP; - unsigned int dataSize; - upl_page_info_t *pl = 0; - - // Each UPL can deal with about one meg at the moment - size = round_page_32(size); - dataSize = sizeof(ARTTableData) + sizeof(upl_t) * size / (1024 * 1024); - ret = OSData::withCapacity(dataSize); - if (!ret) - return 0; - - // Append 0's to the buffer, in-other-words reset to nulls. - ret->appendBytes(NULL, sizeof(ARTTableData)); - dataP = getARTDataP(ret); - - kr = kmem_alloc_contig(kernel_map, &startUpl, size, PAGE_MASK, 0); - if (kr) - return 0; - - dataP->v = (void *) startUpl; - - do { - upl_t iopl; - int upl_flags = UPL_SET_INTERNAL | UPL_SET_LITE - | UPL_SET_IO_WIRE | UPL_COPYOUT_FROM; - vm_size_t iopl_size = size; - - kr = vm_map_get_upl(kernel_map, - (vm_map_offset_t)startUpl, - &iopl_size, - &iopl, - 0, - 0, - &upl_flags, - 0); - if (kr) { - panic("IOMapper:vm_map_get_upl returned 0x%x\n"); - goto bail; - } - - if (!ret->appendBytes(&iopl, sizeof(upl_t))) - goto bail; - - startUpl += iopl_size; - size -= iopl_size; - } while(size); - - // Need to re-establish the dataP as the OSData may have grown. - dataP = getARTDataP(ret); - - // Now grab the page entry of the first page and get its phys addr - pl = UPL_GET_INTERNAL_PAGE_LIST(dataP->u[0]); - *physAddrP = pl->phys_addr; - *virtAddrP = dataP->v; - - return ret; - -bail: - FreeARTTable(ret, size); - return 0; -} - -void IOMapper::FreeARTTable(OSData *artHandle, IOByteCount size) -{ - assert(artHandle); - - ARTTableData *dataP = getARTDataP(artHandle); - - int numupls = ((artHandle->getLength() - sizeof(*dataP)) / sizeof(upl_t)); - for (int i = 0; i < numupls; i++) { - upl_abort(dataP->u[i], 0); - upl_deallocate(dataP->u[i]); - } - - if (dataP->v) { - size = round_page_32(size); - kmem_free(kernel_map, (vm_address_t) dataP->v, size); - } - artHandle->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: + 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 -ppnum_t IOMapperIOVMAlloc(unsigned pages) +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); + 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; } -ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page) +void +IOMapperIOVMFree(ppnum_t addr, unsigned pages) { - if (IOMapper::gSystem) { - IOMapper::gSystem->iovmInsert(addr, (IOItemCount) offset, page); - return addr + offset; - } - 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); + 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; } ///////////////////////////////////////////////////////////////////////////// @@ -290,100 +284,108 @@ void IOMapperInsertUPLPages(ppnum_t addr, unsigned offset, #include -UInt8 IOMappedRead8(IOPhysicalAddress address) +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); + 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->mapAddr(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->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 (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->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 (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->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); + 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->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); + 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->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_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->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_double_64(addr, value); + } else { + ml_phys_write_double((vm_offset_t) address, value); + } } __END_DECLS