1 | /* |
2 | * Copyright (c) 1998-2016 Apple 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 | #ifndef __IOKIT_IOMAPPER_H |
30 | #define __IOKIT_IOMAPPER_H |
31 | |
32 | #include <sys/cdefs.h> |
33 | #include <IOKit/IOTypes.h> |
34 | #include <mach/vm_types.h> |
35 | |
36 | __BEGIN_DECLS |
37 | |
38 | // These are C accessors to the system mapper for non-IOKit clients |
39 | ppnum_t IOMapperIOVMAlloc(unsigned pages); |
40 | void IOMapperIOVMFree(ppnum_t addr, unsigned pages); |
41 | ppnum_t IOMapperInsertPage(ppnum_t addr, unsigned offset, ppnum_t page); |
42 | |
43 | __END_DECLS |
44 | |
45 | #if __cplusplus |
46 | |
47 | #include <IOKit/IOService.h> |
48 | #include <IOKit/IOMemoryDescriptor.h> |
49 | #include <IOKit/IODMACommand.h> |
50 | #include <libkern/c++/OSPtr.h> |
51 | |
52 | class OSData; |
53 | |
54 | extern const OSSymbol * gIOMapperIDKey; |
55 | |
56 | class IOMapper : public IOService |
57 | { |
58 | OSDeclareAbstractStructors(IOMapper); |
59 | |
60 | // Give the platform expert access to setMapperRequired(); |
61 | friend class IOPlatformExpert; |
62 | friend class IOMemoryDescriptor; |
63 | friend class IOGeneralMemoryDescriptor; |
64 | |
65 | private: |
66 | enum SystemMapperState { |
67 | kNoMapper = 0, |
68 | kUnknown = 1, |
69 | kHasMapper = 2, // Any other value is pointer to a live mapper |
70 | kWaitMask = 3, |
71 | }; |
72 | protected: |
73 | #ifdef XNU_KERNEL_PRIVATE |
74 | uint64_t __reservedA[6]; |
75 | kern_allocation_name_t fAllocName; |
76 | uint32_t __reservedB; |
77 | uint32_t fPageSize; |
78 | #else |
79 | uint64_t __reserved[8]; |
80 | #endif |
81 | bool fIsSystem; |
82 | |
83 | static void setMapperRequired(bool hasMapper); |
84 | static void waitForSystemMapper(); |
85 | |
86 | virtual bool initHardware(IOService *provider) = 0; |
87 | |
88 | public: |
89 | virtual bool start(IOService *provider) APPLE_KEXT_OVERRIDE; |
90 | virtual void free() APPLE_KEXT_OVERRIDE; |
91 | |
92 | // To get access to the system mapper IOMapper::gSystem |
93 | static IOMapper *gSystem; |
94 | |
95 | static void |
96 | checkForSystemMapper() |
97 | { |
98 | if ((uintptr_t) gSystem & kWaitMask) { |
99 | waitForSystemMapper(); |
100 | } |
101 | } |
102 | |
103 | static OSPtr<IOMapper> copyMapperForDevice(IOService * device); |
104 | static OSPtr<IOMapper> copyMapperForDeviceWithIndex(IOService * device, unsigned int index); |
105 | |
106 | // { subclasses |
107 | |
108 | virtual uint64_t getPageSize(void) const = 0; |
109 | |
110 | virtual IOReturn iovmMapMemory(IOMemoryDescriptor * memory, |
111 | uint64_t descriptorOffset, |
112 | uint64_t length, |
113 | uint32_t mapOptions, |
114 | const IODMAMapSpecification * mapSpecification, |
115 | IODMACommand * dmaCommand, |
116 | const IODMAMapPageList * pageList, |
117 | uint64_t * mapAddress, |
118 | uint64_t * mapLength) = 0; |
119 | |
120 | virtual IOReturn iovmUnmapMemory(IOMemoryDescriptor * memory, |
121 | IODMACommand * dmaCommand, |
122 | uint64_t mapAddress, |
123 | uint64_t mapLength) = 0; |
124 | |
125 | virtual IOReturn iovmInsert(uint32_t options, |
126 | uint64_t mapAddress, |
127 | uint64_t offset, |
128 | uint64_t physicalAddress, |
129 | uint64_t length) = 0; |
130 | |
131 | virtual uint64_t mapToPhysicalAddress(uint64_t mappedAddress) = 0; |
132 | |
133 | // } |
134 | |
135 | private: |
136 | OSMetaClassDeclareReservedUnused(IOMapper, 0); |
137 | OSMetaClassDeclareReservedUnused(IOMapper, 1); |
138 | OSMetaClassDeclareReservedUnused(IOMapper, 2); |
139 | OSMetaClassDeclareReservedUnused(IOMapper, 3); |
140 | OSMetaClassDeclareReservedUnused(IOMapper, 4); |
141 | OSMetaClassDeclareReservedUnused(IOMapper, 5); |
142 | OSMetaClassDeclareReservedUnused(IOMapper, 6); |
143 | OSMetaClassDeclareReservedUnused(IOMapper, 7); |
144 | OSMetaClassDeclareReservedUnused(IOMapper, 8); |
145 | OSMetaClassDeclareReservedUnused(IOMapper, 9); |
146 | OSMetaClassDeclareReservedUnused(IOMapper, 10); |
147 | OSMetaClassDeclareReservedUnused(IOMapper, 11); |
148 | OSMetaClassDeclareReservedUnused(IOMapper, 12); |
149 | OSMetaClassDeclareReservedUnused(IOMapper, 13); |
150 | OSMetaClassDeclareReservedUnused(IOMapper, 14); |
151 | OSMetaClassDeclareReservedUnused(IOMapper, 15); |
152 | }; |
153 | |
154 | #endif /* __cplusplus */ |
155 | |
156 | #endif /* !__IOKIT_IOMAPPER_H */ |
157 | |