| 1 | /* $XFree86: xc/programs/Xserver/hw/xfree86/common/xf86Module.h,v 1.37 2003/08/24 17:36:54 dawes Exp $ */
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| 2 |
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| 3 | /*
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| 4 | * Copyright (c) 1997-2003 by The XFree86 Project, Inc.
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| 5 | *
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 7 | * copy of this software and associated documentation files (the "Software"),
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| 8 | * to deal in the Software without restriction, including without limitation
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| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 10 | * and/or sell copies of the Software, and to permit persons to whom the
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| 11 | * Software is furnished to do so, subject to the following conditions:
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| 12 | *
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| 13 | * The above copyright notice and this permission notice shall be included in
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| 14 | * all copies or substantial portions of the Software.
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| 15 | *
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| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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| 19 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 22 | * OTHER DEALINGS IN THE SOFTWARE.
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| 23 | *
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| 24 | * Except as contained in this notice, the name of the copyright holder(s)
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| 25 | * and author(s) shall not be used in advertising or otherwise to promote
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| 26 | * the sale, use or other dealings in this Software without prior written
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| 27 | * authorization from the copyright holder(s) and author(s).
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| 28 | */
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| 29 |
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| 30 | /*
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| 31 | * This file contains the parts of the loader interface that are visible
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| 32 | * to modules. This is the only loader-related header that modules should
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| 33 | * include.
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| 34 | *
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| 35 | * It should include a bare minimum of other headers.
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| 36 | *
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| 37 | * Longer term, the module/loader code should probably live directly under
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| 38 | * Xserver/.
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| 39 | *
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| 40 | * XXX This file arguably belongs in xfree86/loader/.
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| 41 | */
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| 42 |
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| 43 | #ifndef _XF86MODULE_H
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| 44 | #define _XF86MODULE_H
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| 45 |
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| 46 | #include "misc.h"
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| 47 | #include "xf86Version.h"
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| 48 | #ifndef NULL
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| 49 | #define NULL ((void *)0)
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| 50 | #endif
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| 51 |
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| 52 | typedef enum {
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| 53 | LD_RESOLV_IFDONE = 0, /* only check if no more
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| 54 | delays pending */
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| 55 | LD_RESOLV_NOW = 1, /* finish one delay step */
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| 56 | LD_RESOLV_FORCE = 2 /* force checking... */
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| 57 | } LoaderResolveOptions;
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| 58 |
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| 59 | #define DEFAULT_LIST ((char *)-1)
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| 60 |
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| 61 | /* This indicates a special module that doesn't have the usual entry point */
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| 62 | #define EXTERN_MODULE ((pointer)-1)
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| 63 |
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| 64 | /* Built-in ABI classes. These definitions must not be changed. */
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| 65 | #define ABI_CLASS_NONE NULL
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| 66 | #define ABI_CLASS_ANSIC "X.Org ANSI C Emulation"
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| 67 | #define ABI_CLASS_VIDEODRV "X.Org Video Driver"
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| 68 | #define ABI_CLASS_XINPUT "X.Org XInput driver"
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| 69 | #define ABI_CLASS_EXTENSION "X.Org Server Extension"
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| 70 | #define ABI_CLASS_FONT "X.Org Font Renderer"
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| 71 |
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| 72 | #define ABI_MINOR_MASK 0x0000FFFF
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| 73 | #define ABI_MAJOR_MASK 0xFFFF0000
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| 74 | #define GET_ABI_MINOR(v) ((v) & ABI_MINOR_MASK)
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| 75 | #define GET_ABI_MAJOR(v) (((v) & ABI_MAJOR_MASK) >> 16)
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| 76 | #define SET_ABI_VERSION(maj, min) \
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| 77 | ((((maj) << 16) & ABI_MAJOR_MASK) | ((min) & ABI_MINOR_MASK))
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| 78 |
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| 79 | /*
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| 80 | * ABI versions. Each version has a major and minor revision. Modules
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| 81 | * using lower minor revisions must work with servers of a higher minor
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| 82 | * revision. There is no compatibility between different major revisions.
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| 83 | * Whenever the ABI_ANSIC_VERSION is changed, the others must also be
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| 84 | * changed. The minor revision mask is 0x0000FFFF and the major revision
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| 85 | * mask is 0xFFFF0000.
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| 86 | */
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| 87 | #define ABI_ANSIC_VERSION SET_ABI_VERSION(0, 2)
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| 88 | #define ABI_VIDEODRV_VERSION SET_ABI_VERSION(0, 8)
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| 89 | #define ABI_XINPUT_VERSION SET_ABI_VERSION(0, 5)
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| 90 | #define ABI_EXTENSION_VERSION SET_ABI_VERSION(0, 2)
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| 91 | #define ABI_FONT_VERSION SET_ABI_VERSION(0, 4)
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| 92 |
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| 93 | #define MODINFOSTRING1 0xef23fdc5
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| 94 | #define MODINFOSTRING2 0x10dc023a
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| 95 |
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| 96 | #ifndef MODULEVENDORSTRING
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| 97 | #ifndef __OS2ELF__
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| 98 | #define MODULEVENDORSTRING "X.Org Foundation"
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| 99 | #else
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| 100 | #define MODULEVENDORSTRING "X.Org Foundation - OS2"
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| 101 | #endif
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| 102 | #endif
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| 103 |
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| 104 | /* Error return codes for errmaj. New codes must only be added at the end. */
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| 105 | typedef enum {
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| 106 | LDR_NOERROR = 0,
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| 107 | LDR_NOMEM, /* memory allocation failed */
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| 108 | LDR_NOENT, /* Module file does not exist */
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| 109 | LDR_NOSUBENT, /* pre-requsite file to be sub-loaded does not exist */
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| 110 | LDR_NOSPACE, /* internal module array full */
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| 111 | LDR_NOMODOPEN, /* module file could not be opened (check errmin) */
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| 112 | LDR_UNKTYPE, /* file is not a recognized module type */
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| 113 | LDR_NOLOAD, /* type specific loader failed */
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| 114 | LDR_ONCEONLY, /* Module should only be loaded once (not an error) */
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| 115 | LDR_NOPORTOPEN, /* could not open port (check errmin) */
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| 116 | LDR_NOHARDWARE, /* could not query/initialize the hardware device */
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| 117 | LDR_MISMATCH, /* the module didn't match the spec'd requirments */
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| 118 | LDR_BADUSAGE, /* LoadModule is called with bad arguments */
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| 119 | LDR_INVALID, /* The module doesn't have a valid ModuleData object */
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| 120 | LDR_BADOS, /* The module doesn't support the OS */
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| 121 | LDR_MODSPECIFIC /* A module-specific error in the SetupProc */
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| 122 | } LoaderErrorCode;
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| 123 |
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| 124 | /*
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| 125 | * Some common module classes. The moduleclass can be used to identify
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| 126 | * that modules loaded are of the correct type. This is a finer
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| 127 | * classification than the ABI classes even though the default set of
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| 128 | * classes have the same names. For example, not all modules that require
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| 129 | * the video driver ABI are themselves video drivers.
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| 130 | */
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| 131 | #define MOD_CLASS_NONE NULL
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| 132 | #define MOD_CLASS_VIDEODRV "X.Org Video Driver"
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| 133 | #define MOD_CLASS_XINPUT "X.Org XInput Driver"
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| 134 | #define MOD_CLASS_FONT "X.Org Font Renderer"
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| 135 | #define MOD_CLASS_EXTENSION "X.Org Server Extension"
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| 136 |
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| 137 | /* This structure is expected to be returned by the initfunc */
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| 138 | typedef struct {
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| 139 | const char * modname; /* name of module, e.g. "foo" */
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| 140 | const char * vendor; /* vendor specific string */
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| 141 | CARD32 _modinfo1_; /* constant MODINFOSTRING1/2 to find */
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| 142 | CARD32 _modinfo2_; /* infoarea with a binary editor or sign tool */
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| 143 | CARD32 xf86version; /* contains XF86_VERSION_CURRENT */
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| 144 | CARD8 majorversion; /* module-specific major version */
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| 145 | CARD8 minorversion; /* module-specific minor version */
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| 146 | CARD16 patchlevel; /* module-specific patch level */
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| 147 | const char * abiclass; /* ABI class that the module uses */
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| 148 | CARD32 abiversion; /* ABI version */
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| 149 | const char * moduleclass; /* module class description */
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| 150 | CARD32 checksum[4]; /* contains a digital signature of the */
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| 151 | /* version info structure */
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| 152 | } XF86ModuleVersionInfo;
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| 153 |
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| 154 | /*
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| 155 | * This structure can be used to callers of LoadModule and LoadSubModule to
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| 156 | * specify version and/or ABI requirements.
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| 157 | */
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| 158 | typedef struct {
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| 159 | CARD8 majorversion; /* module-specific major version */
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| 160 | CARD8 minorversion; /* moudle-specific minor version */
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| 161 | CARD16 patchlevel; /* module-specific patch level */
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| 162 | const char * abiclass; /* ABI class that the module uses */
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| 163 | CARD32 abiversion; /* ABI version */
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| 164 | const char * moduleclass; /* module class */
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| 165 | } XF86ModReqInfo;
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| 166 |
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| 167 | /* values to indicate unspecified fields in XF86ModReqInfo. */
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| 168 | #define MAJOR_UNSPEC 0xFF
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| 169 | #define MINOR_UNSPEC 0xFF
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| 170 | #define PATCH_UNSPEC 0xFFFF
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| 171 | #define ABI_VERS_UNSPEC 0xFFFFFFFF
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| 172 |
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| 173 | #define MODULE_VERSION_NUMERIC(maj, min, patch) \
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| 174 | ((((maj) & 0xFF) << 24) | (((min) & 0xFF) << 16) | (patch & 0xFFFF))
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| 175 | #define GET_MODULE_MAJOR_VERSION(vers) (((vers) >> 24) & 0xFF)
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| 176 | #define GET_MODULE_MINOR_VERSION(vers) (((vers) >> 16) & 0xFF)
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| 177 | #define GET_MODULE_PATCHLEVEL(vers) ((vers) & 0xFFFF)
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| 178 |
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| 179 | #define INITARGS void
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| 180 |
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| 181 | typedef void (*InitExtension)(INITARGS);
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| 182 |
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| 183 | typedef struct {
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| 184 | InitExtension initFunc;
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| 185 | const char * name;
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| 186 | Bool *disablePtr;
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| 187 | InitExtension setupFunc;
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| 188 | const char ** initDependencies;
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| 189 | } ExtensionModule;
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| 190 |
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| 191 | extern ExtensionModule *ExtensionModuleList;
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| 192 |
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| 193 | /* Prototypes for Loader functions that are exported to modules */
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| 194 | #ifndef IN_LOADER
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| 195 | /* Prototypes with opaque pointers for use by modules */
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| 196 | pointer LoadSubModule(pointer, const char *, const char **,
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| 197 | const char **, pointer, const XF86ModReqInfo *,
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| 198 | int *, int *);
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| 199 | void UnloadSubModule(pointer);
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| 200 | void LoadFont(pointer);
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| 201 | void UnloadModule (pointer);
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| 202 | #endif
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| 203 | pointer LoaderSymbol(const char *);
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| 204 | char **LoaderListDirs(const char **, const char **);
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| 205 | void LoaderFreeDirList(char **);
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| 206 | void LoaderErrorMsg(const char *, const char *, int, int);
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| 207 | void LoadExtension(ExtensionModule *, Bool);
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| 208 | void LoaderRefSymLists(const char **, ...);
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| 209 | void LoaderRefSymbols(const char *, ...);
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| 210 | void LoaderReqSymLists(const char **, ...);
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| 211 | void LoaderReqSymbols(const char *, ...);
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| 212 | int LoaderCheckUnresolved(int);
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| 213 | void LoaderGetOS(const char **name, int *major, int *minor, int *teeny);
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| 214 |
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| 215 | typedef pointer (*ModuleSetupProc)(pointer, pointer, int *, int *);
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| 216 | typedef void (*ModuleTearDownProc)(pointer);
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| 217 | #define MODULESETUPPROTO(func) pointer func(pointer, pointer, int*, int*)
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| 218 | #define MODULETEARDOWNPROTO(func) void func(pointer)
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| 219 |
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| 220 | typedef struct {
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| 221 | XF86ModuleVersionInfo * vers;
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| 222 | ModuleSetupProc setup;
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| 223 | ModuleTearDownProc teardown;
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| 224 | } XF86ModuleData;
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| 225 |
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| 226 | #endif /* _XF86STR_H */
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