1 /*
2 * Copyright (c) 1998-2000 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 #define IOKIT_ENABLE_SHARED_PTR
30
31 #include <IOKit/IODMAController.h>
32 #include <libkern/c++/OSSharedPtr.h>
33
34
35 #define super IOService
36 OSDefineMetaClassAndAbstractStructors(IODMAController, IOService);
37
38 OSSharedPtr<const OSSymbol>
createControllerName(UInt32 phandle)39 IODMAController::createControllerName(UInt32 phandle)
40 {
41 #define CREATE_BUF_LEN 48
42 char buf[CREATE_BUF_LEN];
43
44 snprintf(buf, CREATE_BUF_LEN, "IODMAController%08X", (uint32_t)phandle);
45
46 return OSSymbol::withCString(buf);
47 }
48
49 IODMAController *
getController(IOService * provider,UInt32 dmaIndex)50 IODMAController::getController(IOService *provider, UInt32 dmaIndex)
51 {
52 OSData *dmaParentData;
53 OSSharedPtr<const OSSymbol> dmaParentName;
54 IODMAController *dmaController;
55
56 // Find the name of the parent dma controller
57 OSSharedPtr<OSObject> prop = provider->copyProperty("dma-parent");
58 dmaParentData = OSDynamicCast(OSData, prop.get());
59 if (dmaParentData == NULL) {
60 return NULL;
61 }
62
63 if (dmaParentData->getLength() == sizeof(UInt32)) {
64 dmaParentName = createControllerName(*(UInt32 *)dmaParentData->getBytesNoCopy());
65 } else {
66 if (dmaIndex >= dmaParentData->getLength() / sizeof(UInt32)) {
67 panic("dmaIndex out of range");
68 }
69 dmaParentName = createControllerName(*(UInt32 *)dmaParentData->getBytesNoCopy(dmaIndex * sizeof(UInt32), sizeof(UInt32)));
70 }
71 if (dmaParentName == NULL) {
72 return NULL;
73 }
74
75 // Wait for the parent dma controller
76 dmaController = OSDynamicCast(IODMAController, IOService::waitForService( IOService::nameMatching(dmaParentName.get()).detach()));
77
78 return dmaController;
79 }
80
81
82 bool
start(IOService * provider)83 IODMAController::start(IOService *provider)
84 {
85 if (!super::start(provider)) {
86 return false;
87 }
88
89 _provider = provider;
90
91 return true;
92 }
93
94
95 // protected
96
97 void
registerDMAController(IOOptionBits options)98 IODMAController::registerDMAController(IOOptionBits options)
99 {
100 OSData *phandleData;
101
102 OSSharedPtr<OSObject> prop = _provider->copyProperty("AAPL,phandle");
103 phandleData = OSDynamicCast(OSData, prop.get());
104
105 _dmaControllerName = createControllerName(*(UInt32 *)phandleData->getBytesNoCopy());
106
107 setName(_dmaControllerName.get());
108
109 registerService(options | ((options & kIOServiceAsynchronous) ? 0 : kIOServiceSynchronous));
110 }
111
112 void
completeDMACommand(IODMAEventSource * dmaES,IODMACommand * dmaCommand)113 IODMAController::completeDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand)
114 {
115 dmaES->completeDMACommand(dmaCommand);
116 }
117
118 void
notifyDMACommand(IODMAEventSource * dmaES,IODMACommand * dmaCommand,IOReturn status,IOByteCount actualByteCount,AbsoluteTime timeStamp)119 IODMAController::notifyDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount, AbsoluteTime timeStamp)
120 {
121 dmaES->notifyDMACommand(dmaCommand, status, actualByteCount, timeStamp);
122 }
123
124
125 // private
126