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Annotation of XNU/iokit/Families/IOGraphics/IOFramebufferUserClient.cpp, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * Copyright (c) 1998 Apple Computer, Inc.  All rights reserved. 
        !            24:  *
        !            25:  * HISTORY
        !            26:  *
        !            27:  * 14 Aug 98 sdouglas created.
        !            28:  * 08 Dec 98 sdouglas cpp.
        !            29:  */
        !            30: 
        !            31: #define IOFRAMEBUFFER_PRIVATE
        !            32: #include <IOKit/graphics/IOFramebufferShared.h>
        !            33: #include <IOKit/IOLib.h>
        !            34: #include <libkern/c++/OSContainers.h>
        !            35: #include <IOKit/IOBufferMemoryDescriptor.h>
        !            36: 
        !            37: #include <IOKit/IOPlatformExpert.h>
        !            38: 
        !            39: #include <IOKit/assert.h>
        !            40: 
        !            41: #include "IOFramebufferUserClient.h"
        !            42: 
        !            43: #include <IOKit/graphics/IOGraphicsEngine.h>
        !            44: 
        !            45: 
        !            46: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
        !            47: 
        !            48: #undef super
        !            49: #define super IOUserClient
        !            50: 
        !            51: OSDefineMetaClassAndStructors(IOFramebufferUserClient, IOUserClient)
        !            52: 
        !            53: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
        !            54: 
        !            55: IOFramebufferUserClient * IOFramebufferUserClient::withTask( task_t owningTask )
        !            56: {
        !            57:     IOFramebufferUserClient * inst;
        !            58: 
        !            59:     inst = new IOFramebufferUserClient;
        !            60: 
        !            61:     if( inst && !inst->init()) {
        !            62:        inst->release();
        !            63:        inst = 0;
        !            64:     }
        !            65: 
        !            66:     return( inst );
        !            67: }
        !            68: 
        !            69: bool IOFramebufferUserClient::start( IOService * _owner )
        !            70: {
        !            71:     static const IOExternalMethod methodTemplate[] = {
        !            72: /* 0 */  { NULL, NULL, kIOUCScalarIScalarO, 3, 0 },
        !            73: /* 1 */  { NULL, NULL, kIOUCScalarIStructO, 3, sizeof( IOPixelInformation) },
        !            74: /* 2 */  { NULL, NULL, kIOUCScalarIScalarO, 0, 2 },
        !            75: /* 3 */  { NULL, NULL, kIOUCScalarIScalarO, 2, 0 },
        !            76: /* 4 */  { NULL, NULL, kIOUCScalarIScalarO, 2, 0 },
        !            77: /* 5 */  { NULL, NULL, kIOUCScalarIStructO,
        !            78:                                1, sizeof( IODisplayModeInformation) },
        !            79: /* 6 */  { NULL, NULL, kIOUCScalarIScalarO, 0, 1 },
        !            80: /* 7 */  { NULL, NULL, kIOUCStructIStructO, 0, 0xffffffff },
        !            81: /* 8 */  { NULL, NULL, kIOUCScalarIScalarO, 1, 1 },
        !            82: /* 9 */  { NULL, NULL, kIOUCStructIStructO, sizeof( Bounds), 0 },
        !            83: /* 10 */  { NULL, NULL, kIOUCScalarIScalarO, 3, 0 },
        !            84: /* 11 */  { NULL, NULL, kIOUCScalarIStructI, 3, 0xffffffff },
        !            85: /* 12 */  { NULL, NULL, kIOUCScalarIScalarO, 1, 0 },
        !            86: /* 13 */  { NULL, NULL, kIOUCScalarIScalarO, 2, 0 },
        !            87: /* 14 */  { NULL, NULL, kIOUCScalarIScalarO, 0, 0 },
        !            88: /* 15 */  { NULL, NULL, kIOUCScalarIStructI, 1, 0xffffffff },
        !            89: /* 16 */  { NULL, NULL, kIOUCScalarIStructI, 2, 0xffffffff },
        !            90: 
        !            91:     };
        !            92: 
        !            93:     if( !super::start( _owner ))
        !            94:        return( false);
        !            95: 
        !            96:     owner = (IOFramebuffer *) _owner;
        !            97: 
        !            98:     assert( sizeof( methodTemplate) == sizeof( externals));
        !            99:     bcopy( methodTemplate, externals, sizeof( externals ));
        !           100: 
        !           101:     externals[0].object = owner;
        !           102:     externals[0].func = (IOMethod) &IOFramebuffer::createSharedCursor;
        !           103: 
        !           104:     externals[1].object = owner;
        !           105:     externals[1].func = (IOMethod) &IOFramebuffer::getPixelInformation;
        !           106: 
        !           107:     externals[2].object = owner;
        !           108:     externals[2].func = (IOMethod) &IOFramebuffer::getCurrentDisplayMode;
        !           109: 
        !           110:     externals[3].object = owner;
        !           111:     externals[3].func = (IOMethod) &IOFramebuffer::setStartupDisplayMode;
        !           112: 
        !           113:     externals[4].object = owner;
        !           114:     externals[4].func = (IOMethod) &IOFramebuffer::extSetDisplayMode;
        !           115: 
        !           116:     externals[5].object = owner;
        !           117:     externals[5].func = 
        !           118:        (IOMethod) &IOFramebuffer::extGetInformationForDisplayMode;
        !           119: 
        !           120:     externals[6].object = owner;
        !           121:     externals[6].func = (IOMethod) &IOFramebuffer::extGetDisplayModeCount;
        !           122: 
        !           123:     externals[7].object = owner;
        !           124:     externals[7].func = (IOMethod) &IOFramebuffer::extGetDisplayModes;
        !           125: 
        !           126:     externals[8].object = owner;
        !           127:     externals[8].func = (IOMethod) &IOFramebuffer::extGetVRAMMapOffset;
        !           128: 
        !           129:     externals[9].object = owner;
        !           130:     externals[9].func = (IOMethod) &IOFramebuffer::extSetBounds;
        !           131: 
        !           132:     externals[10].object = owner;
        !           133:     externals[10].func = (IOMethod) &IOFramebuffer::extSetNewCursor;
        !           134: 
        !           135:     externals[11].object = owner;
        !           136:     externals[11].func = (IOMethod) &IOFramebuffer::setGammaTable;
        !           137: 
        !           138:     externals[12].object = owner;
        !           139:     externals[12].func = (IOMethod) &IOFramebuffer::extSetCursorVisible;
        !           140: 
        !           141:     externals[13].object = owner;
        !           142:     externals[13].func = (IOMethod) &IOFramebuffer::extSetCursorPosition;
        !           143: 
        !           144:     externals[14].object = this;
        !           145:     externals[14].func = (IOMethod) &IOFramebufferUserClient::acknowledgeNotification;
        !           146: 
        !           147:     externals[15].object = owner;
        !           148:     externals[15].func = (IOMethod) &IOFramebuffer::extSetColorConvertTable;
        !           149: 
        !           150:     externals[16].object = owner;
        !           151:     externals[16].func = (IOMethod) &IOFramebuffer::extSetCLUTWithEntries;
        !           152: 
        !           153:     owner->serverConnect = this;
        !           154: 
        !           155:     current_power_state = owner->registerInterestedDriver(this);
        !           156:     owner->disallowPowerDown();
        !           157:     return( true );
        !           158: }
        !           159: 
        !           160: 
        !           161: IOReturn
        !           162: IOFramebufferUserClient::acknowledgeNotification( void )
        !           163: {
        !           164:     return( owner->acknowledgePowerChange(this));
        !           165: }
        !           166: 
        !           167: // If the frame buffer is being powered down, tell the window server.
        !           168: IOReturn
        !           169: IOFramebufferUserClient::powerStateWillChangeTo (IOPMPowerFlags newState, unsigned long, IOService* )
        !           170: {
        !           171:     kern_return_t r;
        !           172:     mach_msg_header_t *msgh;
        !           173: 
        !           174:     if ( (current_power_state & IOPMDeviceUsable) && ! (newState & IOPMDeviceUsable) ) {
        !           175:         msgh = (mach_msg_header_t *)notificationMsg;
        !           176:         if( msgh && WSnotificationPort ) {
        !           177:             msgh->msgh_id = 0;
        !           178:             r = mach_msg_send_from_kernel( msgh, msgh->msgh_size);
        !           179:         }
        !           180:         current_power_state = newState;
        !           181:         return 10000000;                               // WS will ack within ten seconds
        !           182:     }
        !           183:     return IOPMAckImplied;
        !           184: }
        !           185: 
        !           186: 
        !           187: // If the frame buffer has been powered up, tell the window server.
        !           188: IOReturn
        !           189: IOFramebufferUserClient::powerStateDidChangeTo (IOPMPowerFlags newState, unsigned long, IOService* )
        !           190: {
        !           191:     kern_return_t r;
        !           192:     mach_msg_header_t *msgh;
        !           193: 
        !           194:     if ( !(current_power_state & IOPMDeviceUsable) && (newState & IOPMDeviceUsable) ) {
        !           195:         msgh = (mach_msg_header_t *)notificationMsg;
        !           196:         if( msgh && WSnotificationPort ) {
        !           197:             msgh->msgh_id = 1;
        !           198:             r = mach_msg_send_from_kernel( msgh, msgh->msgh_size);
        !           199:         }
        !           200:         current_power_state = newState;
        !           201:         return 10000000;                               // WS will ack within ten seconds
        !           202:     }
        !           203:     return IOPMAckImplied;
        !           204: }
        !           205: 
        !           206: 
        !           207: IOReturn IOFramebufferUserClient::registerNotificationPort(
        !           208:                 mach_port_t    port,
        !           209:                 UInt32         type,
        !           210:                 UInt32         refCon )
        !           211: {
        !           212:     static mach_msg_header_t init_msg = {
        !           213:         // mach_msg_bits_t     msgh_bits;
        !           214:         MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND,0),
        !           215:         // mach_msg_size_t     msgh_size;
        !           216:         sizeof (mach_msg_header_t),
        !           217:         // mach_port_t msgh_remote_port;
        !           218:         MACH_PORT_NULL,
        !           219:         // mach_port_t msgh_local_port;
        !           220:         MACH_PORT_NULL,
        !           221:         // mach_msg_size_t     msgh_reserved;
        !           222:         0,
        !           223:         // mach_msg_id_t       msgh_id;
        !           224:         0
        !           225:      };
        !           226: 
        !           227:     if ( notificationMsg == NULL )
        !           228:         notificationMsg = IOMalloc( sizeof (mach_msg_header_t) );
        !           229:     // Initialize the power state change notification message.
        !           230:     *((mach_msg_header_t *)notificationMsg) = init_msg;
        !           231: 
        !           232:     ((mach_msg_header_t *)notificationMsg)->msgh_remote_port = port;
        !           233:     
        !           234:     WSnotificationPort = port;
        !           235:     owner->allowPowerDown();
        !           236:     return( kIOReturnSuccess);
        !           237: }
        !           238: 
        !           239: IOReturn IOFramebufferUserClient::getNotificationSemaphore(
        !           240:                             UInt32 interruptType, semaphore_t * semaphore )
        !           241: {
        !           242:     return( owner->getNotificationSemaphore(interruptType, semaphore) );
        !           243: }
        !           244: 
        !           245: // The window server is going away.
        !           246: // We disallow power down to prevent idle sleep while the console is running.
        !           247: IOReturn IOFramebufferUserClient::clientClose( void )
        !           248: {
        !           249:     owner->close();
        !           250:     if( owner->isConsoleDevice())
        !           251:         getPlatform()->setConsoleInfo( 0, kPEAcquireScreen);
        !           252: 
        !           253:     owner->deRegisterInterestedDriver(this);
        !           254:     owner->disallowPowerDown();
        !           255:     if( notificationMsg)
        !           256:        IOFree( notificationMsg, sizeof (mach_msg_header_t));
        !           257:     owner->serverConnect = 0;
        !           258:     WSnotificationPort = NULL;
        !           259:     detach( owner);
        !           260: 
        !           261:     return( kIOReturnSuccess);
        !           262: }
        !           263: 
        !           264: IOService * IOFramebufferUserClient::getService( void )
        !           265: {
        !           266:     return( owner );
        !           267: }
        !           268: 
        !           269: IOReturn IOFramebufferUserClient::clientMemoryForType( UInt32 type,
        !           270:         IOOptionBits * flags, IOMemoryDescriptor ** memory )
        !           271: {
        !           272:     IOMemoryDescriptor *       mem;
        !           273:     IOReturn           err;
        !           274: 
        !           275:     switch( type) {
        !           276: 
        !           277:        case kIOFBCursorMemory:
        !           278:            mem = owner->sharedCursor;
        !           279:            mem->retain();
        !           280:            break;
        !           281: 
        !           282:        case kIOFBVRAMMemory:
        !           283:            mem = owner->getVRAMRange();
        !           284:            break;
        !           285: 
        !           286:        default:
        !           287:             mem = (IOMemoryDescriptor *) owner->userAccessRanges->getObject( type );
        !           288:             mem->retain();
        !           289:            break;
        !           290:     }
        !           291: 
        !           292:     *memory = mem;
        !           293:     if( mem)
        !           294:        err = kIOReturnSuccess;
        !           295:     else
        !           296:        err = kIOReturnBadArgument;
        !           297: 
        !           298:     return( err );
        !           299: }
        !           300: 
        !           301: IOExternalMethod * IOFramebufferUserClient::getExternalMethodForIndex( UInt32 index )
        !           302: {
        !           303:     if( index < (sizeof( externals) / sizeof( externals[0])))
        !           304:        return( externals + index);
        !           305:     else
        !           306:        return( NULL);
        !           307: }
        !           308: 
        !           309: 
        !           310: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
        !           311: 
        !           312: OSDefineMetaClassAndStructors(IOGraphicsEngineClient, IOUserClient)
        !           313: 
        !           314: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
        !           315: 
        !           316: IOGraphicsEngineClient * IOGraphicsEngineClient::withTask( task_t owningTask )
        !           317: {
        !           318:     IOGraphicsEngineClient * inst;
        !           319: 
        !           320:     inst = new IOGraphicsEngineClient;
        !           321: 
        !           322:     if( inst && !inst->init()) {
        !           323:        inst->release();
        !           324:        inst = 0;
        !           325:     }
        !           326:     if( inst)
        !           327:        inst->owningTask = owningTask;
        !           328: 
        !           329:     return( inst );
        !           330: }
        !           331: 
        !           332: bool IOGraphicsEngineClient::start( IOService * _owner )
        !           333: {
        !           334: 
        !           335:     static const IOExternalMethod methodTemplate[] = {
        !           336: /* 0 */  { NULL, NULL, kIOUCScalarIScalarO, 3, 1 },
        !           337: /* 1 */  { NULL, NULL, kIOUCScalarIScalarO, 2, 2 },
        !           338: /* 2 */  { NULL, NULL, kIOUCScalarIScalarO, 3, 2 },
        !           339: /* 3 */  { NULL, NULL, kIOUCScalarIScalarO, 1, 0 },
        !           340:     };
        !           341: 
        !           342:     IOGraphicsEngineContext *  mem;
        !           343:     IOByteCount                        size;
        !           344: 
        !           345:     if( !super::start( _owner ))
        !           346:        return( false);
        !           347: 
        !           348:     owner = (IOFramebuffer *) _owner;
        !           349:     agpDev = OSDynamicCast( IOAGPDevice, owner->getProvider());
        !           350:     descriptors = OSArray::withCapacity( 1 );
        !           351: 
        !           352:     bcopy( methodTemplate, externals, sizeof( methodTemplate ));
        !           353: 
        !           354:     externals[0].object = this;
        !           355:     externals[0].func = (IOMethod) &IOGraphicsEngineClient::addUserRange;
        !           356:     externals[1].object = this;
        !           357:     externals[1].func = (IOMethod) &IOGraphicsEngineClient::createAGPSpace;
        !           358:     externals[2].object = this;
        !           359:     externals[2].func = (IOMethod) &IOGraphicsEngineClient::commitAGPMemory;
        !           360:     externals[3].object = this;
        !           361:     externals[3].func = (IOMethod) &IOGraphicsEngineClient::releaseAGPMemory;
        !           362: 
        !           363:     if( 0 == owner->engineContext) {
        !           364: 
        !           365:        size = round_page( sizeof( IOGraphicsEngineContext));
        !           366:        owner->engineContext = IOBufferMemoryDescriptor::withCapacity(
        !           367:                                        size, kIODirectionNone, false );
        !           368:        if( !owner->engineContext)
        !           369:            return( kIOReturnNoMemory );
        !           370:        owner->engineContext->setLength( size );
        !           371: 
        !           372:        mem = (IOGraphicsEngineContext *)
        !           373:                owner->engineContext->getBytesNoCopy();
        !           374:         memset((char *)mem, 0, size);
        !           375:         mem->version = kIOGraphicsEngineContextVersion;
        !           376:         mem->structSize = size;
        !           377:     }
        !           378: 
        !           379:     return( true );
        !           380: }
        !           381: 
        !           382: void IOGraphicsEngineClient::free()
        !           383: {
        !           384:     if( descriptors)
        !           385:        descriptors->free();
        !           386: 
        !           387:     if( agpDev && haveAGP)
        !           388:        agpDev->destroyAGPSpace();
        !           389: 
        !           390:     super::free();
        !           391: }
        !           392: 
        !           393: IOReturn IOGraphicsEngineClient::clientClose( void )
        !           394: {
        !           395:     detach( owner );
        !           396: 
        !           397:     return( kIOReturnSuccess);
        !           398: }
        !           399: 
        !           400: IOService * IOGraphicsEngineClient::getService( void )
        !           401: {
        !           402:     return( owner );
        !           403: }
        !           404: 
        !           405: IOReturn IOGraphicsEngineClient::clientMemoryForType( UInt32 type,
        !           406:                                IOOptionBits * options, IOMemoryDescriptor ** memory )
        !           407: {
        !           408:     IOMemoryDescriptor *       mem;
        !           409: 
        !           410:     switch( type) {
        !           411:        case kIOGraphicsEngineContext:
        !           412:            mem = owner->engineContext;
        !           413:            break;
        !           414:        default:
        !           415:            mem = (IOMemoryDescriptor *) owner->engineAccessRanges->getObject( type );
        !           416:            break;
        !           417:     }
        !           418: 
        !           419:     if( mem) {
        !           420:        mem->retain();
        !           421:        *memory = mem;
        !           422:        return( kIOReturnSuccess);
        !           423:     } else
        !           424:        return( kIOReturnBadArgument);
        !           425: }
        !           426: 
        !           427: IOExternalMethod * IOGraphicsEngineClient::getExternalMethodForIndex( UInt32 index )
        !           428: {
        !           429:     if( index < (sizeof( externals) / sizeof( externals[0])))
        !           430:        return( externals + index);
        !           431:     else
        !           432:        return( NULL);
        !           433: }
        !           434: 
        !           435: IOReturn IOGraphicsEngineClient::addUserRange( vm_address_t start,
        !           436:                vm_size_t length, UInt32 apertureIndex, IOPhysicalAddress * phys )
        !           437: {
        !           438:     IODeviceMemory *   mem;
        !           439:     IOReturn           err = kIOReturnSuccess;
        !           440:     OSArray *          ranges;
        !           441:     int                        i;
        !           442:     IODeviceMemory *   aperture
        !           443:         = owner->getProvider()->getDeviceMemoryWithIndex( apertureIndex );
        !           444: 
        !           445:     if( 0 == aperture)
        !           446:        return( kIOReturnBadArgument );
        !           447: 
        !           448:     ranges = owner->engineAccessRanges;
        !           449:     i = 0;
        !           450:     while( (mem = (IODeviceMemory *) ranges->getObject( i++ ))) {
        !           451:        if( (mem->getPhysicalAddress() ==
        !           452:                        (start + aperture->getPhysicalAddress()))
        !           453:            && (length <= mem->getLength()) )
        !           454:                break;
        !           455:     }
        !           456: 
        !           457:     if( 0 == mem) {
        !           458:         mem = IODeviceMemory::withSubRange(
        !           459:                     aperture, start, length );
        !           460:         if( mem) {
        !           461:             owner->engineAccessRanges->setObject( mem );
        !           462:            err = kIOReturnSuccess;
        !           463:        } else
        !           464:             err = kIOReturnNoResources;
        !           465:     }
        !           466: 
        !           467:     if( kIOReturnSuccess == err)
        !           468:        *phys = mem->getPhysicalAddress();
        !           469: 
        !           470:     return( err );
        !           471: }
        !           472: 
        !           473: IOReturn IOGraphicsEngineClient::createAGPSpace( IOOptionBits options,
        !           474:                                                 IOPhysicalLength length,
        !           475:                                                 IOPhysicalAddress * address, 
        !           476:                                                 IOPhysicalLength * lengthOut )
        !           477: {
        !           478:     IOReturn                   err;
        !           479: 
        !           480:     if( !agpDev)
        !           481:        return( kIOReturnUnsupported );
        !           482: 
        !           483:     *lengthOut = length;
        !           484:     err = agpDev->createAGPSpace( options, address, lengthOut );
        !           485:     haveAGP = (kIOReturnSuccess == err);
        !           486: 
        !           487:     return( err );
        !           488: }
        !           489: 
        !           490: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
        !           491: 
        !           492: class _IOGraphicsClientMemory : public OSObject {
        !           493:     OSDeclareDefaultStructors(_IOGraphicsClientMemory)
        !           494: public:
        !           495:     IOMemoryDescriptor *       memory;
        !           496:     IOAGPDevice *              agpDev;
        !           497:     IOByteCount                        agpOffset;
        !           498: 
        !           499:     virtual bool init();
        !           500:     virtual void free();
        !           501: };
        !           502: 
        !           503: OSDefineMetaClassAndStructors(_IOGraphicsClientMemory, OSObject)
        !           504: 
        !           505: bool _IOGraphicsClientMemory::init()
        !           506: {
        !           507:     return( OSObject::init());
        !           508: }
        !           509: 
        !           510: void _IOGraphicsClientMemory::free()
        !           511: {
        !           512:     if( memory) {
        !           513:        agpDev->getAGPRangeAllocator()->deallocate( agpOffset, 
        !           514:                                                memory->getLength() );
        !           515:        memory->complete();
        !           516:        memory->release();
        !           517:     }
        !           518: 
        !           519:     OSObject::free();
        !           520: }
        !           521: 
        !           522: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
        !           523: 
        !           524: IOReturn IOGraphicsEngineClient::commitAGPMemory( vm_address_t start,
        !           525:                vm_size_t length, IOOptionBits options,
        !           526:                void ** ref, IOByteCount * offset )
        !           527: {
        !           528:     _IOGraphicsClientMemory *  graphicsMem;
        !           529:     IORangeAllocator *         rangeAllocator;
        !           530:     IOByteCount                        agpOffset;
        !           531:     IOReturn                   err = kIOReturnNoMemory;
        !           532:     bool                       ok;
        !           533: 
        !           534:     if( !agpDev)
        !           535:        return( kIOReturnUnsupported );
        !           536:     if( (!start) || (!length))
        !           537:        return( kIOReturnBadArgument );
        !           538:     rangeAllocator = agpDev->getAGPRangeAllocator();
        !           539:     if( !rangeAllocator)
        !           540:        return( kIOReturnUnsupported );
        !           541: 
        !           542:     do {
        !           543:        graphicsMem = new _IOGraphicsClientMemory;
        !           544:        if( (!graphicsMem) || (!graphicsMem->init()))
        !           545:            continue;
        !           546: 
        !           547:        ok = rangeAllocator->allocate( length, (IORangeScalar *) &agpOffset );
        !           548:        if( !ok) {
        !           549:            err = kIOReturnNoSpace;
        !           550:            continue;
        !           551:        }
        !           552: 
        !           553:        graphicsMem->agpDev = agpDev;
        !           554:        graphicsMem->agpOffset = agpOffset;
        !           555: 
        !           556:        graphicsMem->memory = IOMemoryDescriptor::withAddress( start, length,
        !           557:                kIODirectionOut, owningTask );
        !           558:        if( !graphicsMem->memory)
        !           559:            continue;
        !           560: 
        !           561:        err = graphicsMem->memory->prepare();
        !           562:        if( err != kIOReturnSuccess)
        !           563:            continue;
        !           564: 
        !           565:        err = agpDev->commitAGPMemory( graphicsMem->memory, agpOffset );
        !           566:        if( err != kIOReturnSuccess)
        !           567:            continue;
        !           568: 
        !           569:        *ref = (void *) descriptors->getCount();
        !           570:        *offset = agpOffset;
        !           571:        descriptors->setObject( graphicsMem );
        !           572: 
        !           573:     } while( false );
        !           574: 
        !           575:     if( graphicsMem)
        !           576:        graphicsMem->release();
        !           577: 
        !           578:     if( (kIOReturnSuccess != err) && (!graphicsMem))
        !           579:        rangeAllocator->deallocate( agpOffset, length );
        !           580: 
        !           581:     return( err );
        !           582: }
        !           583: 
        !           584: IOReturn IOGraphicsEngineClient::releaseAGPMemory( void * ref )
        !           585: {
        !           586:     _IOGraphicsClientMemory *  graphicsMem;
        !           587:     UInt32                     index = (UInt32) ref;
        !           588: 
        !           589:     if( 0 == (graphicsMem = (_IOGraphicsClientMemory *)
        !           590:                descriptors->getObject( index )))
        !           591:        return( kIOReturnBadArgument );
        !           592: 
        !           593:     descriptors->removeObject( index );
        !           594: 
        !           595:     return( kIOReturnSuccess );
        !           596: }
        !           597: 
        !           598: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
        !           599: 
        !           600: OSDefineMetaClassAndStructors(IOFramebufferSharedUserClient, IOUserClient)
        !           601: 
        !           602: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
        !           603: 
        !           604: IOFramebufferSharedUserClient * IOFramebufferSharedUserClient::withTask(
        !           605:                                                                 task_t owningTask )
        !           606: {
        !           607:     IOFramebufferSharedUserClient * inst;
        !           608: 
        !           609:     inst = new IOFramebufferSharedUserClient;
        !           610: 
        !           611:     if( inst && !inst->init()) {
        !           612:        inst->release();
        !           613:        inst = 0;
        !           614:     }
        !           615: 
        !           616:     return( inst );
        !           617: }
        !           618: 
        !           619: bool IOFramebufferSharedUserClient::start( IOService * _owner )
        !           620: {
        !           621: 
        !           622:     static const IOExternalMethod methodTemplate[] = {
        !           623:     };
        !           624: 
        !           625:     if( !super::start( _owner ))
        !           626:        return( false);
        !           627: 
        !           628:     owner = (IOFramebuffer *) _owner;
        !           629: 
        !           630:     bcopy( methodTemplate, externals, sizeof( methodTemplate ));
        !           631: 
        !           632:     return( true );
        !           633: }
        !           634: 
        !           635: void IOFramebufferSharedUserClient::free( void )
        !           636: {
        !           637:     retain(); retain();
        !           638:     owner->sharedConnect = 0;
        !           639:     detach( owner);
        !           640:     super::free();
        !           641: }
        !           642: 
        !           643: void IOFramebufferSharedUserClient::release() const
        !           644: {
        !           645:     super::release(2);
        !           646: }
        !           647: 
        !           648: IOReturn IOFramebufferSharedUserClient::clientClose( void )
        !           649: {
        !           650:     return( kIOReturnSuccess);
        !           651: }
        !           652: 
        !           653: IOService * IOFramebufferSharedUserClient::getService( void )
        !           654: {
        !           655:     return( owner );
        !           656: }
        !           657: 
        !           658: IOReturn IOFramebufferSharedUserClient::clientMemoryForType( UInt32 type,
        !           659:                                IOOptionBits * options, IOMemoryDescriptor ** memory )
        !           660: {
        !           661:     IOMemoryDescriptor *       mem = 0;
        !           662:     IOReturn                   err;
        !           663: 
        !           664:     switch( type) {
        !           665: 
        !           666:        case kIOFBCursorMemory:
        !           667:            mem = owner->sharedCursor;
        !           668:            mem->retain();
        !           669:             *options = kIOMapReadOnly;
        !           670:            break;
        !           671: 
        !           672:        case kIOFBVRAMMemory:
        !           673:            mem = owner->getVRAMRange();
        !           674:            break;
        !           675:     }
        !           676: 
        !           677:     *memory = mem;
        !           678:     if( mem)
        !           679:        err = kIOReturnSuccess;
        !           680:     else
        !           681:        err = kIOReturnBadArgument;
        !           682: 
        !           683:     return( err );
        !           684: }
        !           685: 
        !           686: IOReturn IOFramebufferSharedUserClient::getNotificationSemaphore(
        !           687:                             UInt32 interruptType, semaphore_t * semaphore )
        !           688: {
        !           689:     return( owner->getNotificationSemaphore(interruptType, semaphore) );
        !           690: }
        !           691: 
        !           692: IOExternalMethod * IOFramebufferSharedUserClient::getExternalMethodForIndex( UInt32 index )
        !           693: {
        !           694:     if( index < (sizeof( externals) / sizeof( externals[0])))
        !           695:        return( externals + index);
        !           696:     else
        !           697:        return( NULL);
        !           698: }
        !           699: 

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