iokit/IOKit/IOPolledInterface.h

   1 /*
   2  * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <libkern/c++/OSObject.h>
  30
  31 #define kIOPolledInterfaceSupportKey "IOPolledInterface"
  32
  33 enum
  34 {
  35     kIOPolledPreflightState   = 1,
  36     kIOPolledBeforeSleepState = 2,
  37     kIOPolledAfterSleepState  = 3,
  38     kIOPolledPostflightState  = 4
  39 };
  40
  41 enum
  42 {
  43     kIOPolledWrite = 1,
  44     kIOPolledRead  = 2
  45 };
  46
  47 typedef void (*IOPolledCompletionAction)( void *   target,
  48                                           void *   parameter,
  49                                           IOReturn status,
  50                                           uint64_t actualByteCount);
  51 struct IOPolledCompletion
  52 {
  53     void *                    target;
  54     IOPolledCompletionAction  action;
  55     void *                    parameter;
  56 };
  57
  58 class IOPolledInterface : public OSObject
  59 {
  60     OSDeclareAbstractStructors(IOPolledInterface);
  61
  62 protected:
  63     struct ExpansionData { };
  64     ExpansionData * reserved;
  65
  66 public:
  67     virtual IOReturn probe(IOService * target) = 0;
  68
  69     virtual IOReturn open( IOOptionBits state, IOMemoryDescriptor * buffer) = 0;
  70     virtual IOReturn close(IOOptionBits state) = 0;
  71
  72     virtual IOReturn startIO(uint32_t           operation,
  73                              uint32_t           bufferOffset,
  74                              uint64_t           deviceOffset,
  75                              uint64_t           length,
  76                              IOPolledCompletion completion) = 0;
  77
  78     virtual IOReturn checkForWork(void) = 0;
  79
  80     static IOReturn checkAllForWork(void);
  81
  82     OSMetaClassDeclareReservedUnused(IOPolledInterface, 0);
  83     OSMetaClassDeclareReservedUnused(IOPolledInterface, 1);
  84     OSMetaClassDeclareReservedUnused(IOPolledInterface, 2);
  85     OSMetaClassDeclareReservedUnused(IOPolledInterface, 3);
  86     OSMetaClassDeclareReservedUnused(IOPolledInterface, 4);
  87     OSMetaClassDeclareReservedUnused(IOPolledInterface, 5);
  88     OSMetaClassDeclareReservedUnused(IOPolledInterface, 6);
  89     OSMetaClassDeclareReservedUnused(IOPolledInterface, 7);
  90     OSMetaClassDeclareReservedUnused(IOPolledInterface, 8);
  91     OSMetaClassDeclareReservedUnused(IOPolledInterface, 9);
  92     OSMetaClassDeclareReservedUnused(IOPolledInterface, 10);
  93     OSMetaClassDeclareReservedUnused(IOPolledInterface, 11);
  94     OSMetaClassDeclareReservedUnused(IOPolledInterface, 12);
  95     OSMetaClassDeclareReservedUnused(IOPolledInterface, 13);
  96     OSMetaClassDeclareReservedUnused(IOPolledInterface, 14);
  97     OSMetaClassDeclareReservedUnused(IOPolledInterface, 15);
  98 };
  99