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> |
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(cString: buf); |
47 | } |
48 | |
49 | IODMAController * |
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(aKey: "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(phandle: *(UInt32 *)dmaParentData->getBytesNoCopy()); |
65 | } else { |
66 | if (dmaIndex >= dmaParentData->getLength() / sizeof(UInt32)) { |
67 | panic("dmaIndex out of range" ); |
68 | } |
69 | dmaParentName = createControllerName(phandle: *(UInt32 *)dmaParentData->getBytesNoCopy(start: dmaIndex * sizeof(UInt32), numBytes: 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 |
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 |
98 | IODMAController::registerDMAController(IOOptionBits options) |
99 | { |
100 | OSData *phandleData; |
101 | |
102 | OSSharedPtr<OSObject> prop = _provider->copyProperty(aKey: "AAPL,phandle" ); |
103 | phandleData = OSDynamicCast(OSData, prop.get()); |
104 | |
105 | _dmaControllerName = createControllerName(phandle: *(UInt32 *)phandleData->getBytesNoCopy()); |
106 | |
107 | setName(name: _dmaControllerName.get()); |
108 | |
109 | registerService(options: options | ((options & kIOServiceAsynchronous) ? 0 : kIOServiceSynchronous)); |
110 | } |
111 | |
112 | void |
113 | IODMAController::completeDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand) |
114 | { |
115 | dmaES->completeDMACommand(dmaCommand); |
116 | } |
117 | |
118 | void |
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 | |