| 1 | /* |
| 2 | * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany |
| 3 | * Copyright 1993 by David Wexelblat <dwex@goblin.org> |
| 4 | * Copyright 1999 by David Holland <davidh@iquest.net> |
| 5 | * |
| 6 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 7 | * documentation for any purpose is hereby granted without fee, provided that |
| 8 | * the above copyright notice appear in all copies and that both that copyright |
| 9 | * notice and this permission notice appear in supporting documentation, and |
| 10 | * that the names of the copyright holders not be used in advertising or |
| 11 | * publicity pertaining to distribution of the software without specific, |
| 12 | * written prior permission. The copyright holders make no representations |
| 13 | * about the suitability of this software for any purpose. It is provided "as |
| 14 | * is" without express or implied warranty. |
| 15 | * |
| 16 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 17 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT |
| 18 | * SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| 19 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| 20 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 21 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
| 22 | * OF THIS SOFTWARE. |
| 23 | * |
| 24 | */ |
| 25 | /* Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
| 26 | * |
| 27 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 28 | * copy of this software and associated documentation files (the "Software"), |
| 29 | * to deal in the Software without restriction, including without limitation |
| 30 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 31 | * and/or sell copies of the Software, and to permit persons to whom the |
| 32 | * Software is furnished to do so, subject to the following conditions: |
| 33 | * |
| 34 | * The above copyright notice and this permission notice (including the next |
| 35 | * paragraph) shall be included in all copies or substantial portions of the |
| 36 | * Software. |
| 37 | * |
| 38 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 39 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 40 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 41 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 42 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 43 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 44 | * DEALINGS IN THE SOFTWARE. |
| 45 | */ |
| 46 | |
| 47 | #ifdef HAVE_XORG_CONFIG_H |
| 48 | #include <xorg-config.h> |
| 49 | #endif |
| 50 | |
| 51 | #include <sys/types.h> /* get __x86 definition if not set by compiler */ |
| 52 | |
| 53 | #if defined(__i386__) || defined(__i386) || defined(__x86) |
| 54 | #define _NEED_SYSI86 |
| 55 | #endif |
| 56 | #include "xf86.h" |
| 57 | #include "xf86Priv.h" |
| 58 | #include "xf86_OSlib.h" |
| 59 | #include "xf86OSpriv.h" |
| 60 | #include <sys/mman.h> |
| 61 | |
| 62 | /***************************************************************************/ |
| 63 | /* Video Memory Mapping section */ |
| 64 | /***************************************************************************/ |
| 65 | |
| 66 | static char *apertureDevName = NULL; |
| 67 | static int apertureDevFD_ro = -1; |
| 68 | static int apertureDevFD_rw = -1; |
| 69 | |
| 70 | static Bool |
| 71 | solOpenAperture(void) |
| 72 | { |
| 73 | if (apertureDevName == NULL) { |
| 74 | apertureDevName = "/dev/xsvc"; |
| 75 | if ((apertureDevFD_rw = open(apertureDevName, O_RDWR)) < 0) { |
| 76 | xf86MsgVerb(X_WARNING, 0, |
| 77 | "solOpenAperture: failed to open %s (%s)\n", |
| 78 | apertureDevName, strerror(errno)); |
| 79 | apertureDevName = "/dev/fbs/aperture"; |
| 80 | apertureDevFD_rw = open(apertureDevName, O_RDWR); |
| 81 | } |
| 82 | apertureDevFD_ro = open(apertureDevName, O_RDONLY); |
| 83 | |
| 84 | if ((apertureDevFD_rw < 0) || (apertureDevFD_ro < 0)) { |
| 85 | xf86MsgVerb(X_WARNING, 0, |
| 86 | "solOpenAperture: failed to open %s (%s)\n", |
| 87 | apertureDevName, strerror(errno)); |
| 88 | xf86MsgVerb(X_WARNING, 0, |
| 89 | "solOpenAperture: either /dev/fbs/aperture" |
| 90 | " or /dev/xsvc required\n"); |
| 91 | |
| 92 | apertureDevName = NULL; |
| 93 | |
| 94 | if (apertureDevFD_rw >= 0) { |
| 95 | close(apertureDevFD_rw); |
| 96 | } |
| 97 | apertureDevFD_rw = -1; |
| 98 | |
| 99 | if (apertureDevFD_ro >= 0) { |
| 100 | close(apertureDevFD_ro); |
| 101 | } |
| 102 | apertureDevFD_ro = -1; |
| 103 | |
| 104 | return FALSE; |
| 105 | } |
| 106 | } |
| 107 | return TRUE; |
| 108 | } |
| 109 | |
| 110 | static pointer |
| 111 | solMapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int Flags) |
| 112 | { |
| 113 | pointer base; |
| 114 | int fd; |
| 115 | int prot; |
| 116 | |
| 117 | if (Flags & VIDMEM_READONLY) { |
| 118 | fd = apertureDevFD_ro; |
| 119 | prot = PROT_READ; |
| 120 | } |
| 121 | else { |
| 122 | fd = apertureDevFD_rw; |
| 123 | prot = PROT_READ | PROT_WRITE; |
| 124 | } |
| 125 | |
| 126 | if (fd < 0) { |
| 127 | xf86DrvMsg(ScreenNum, X_ERROR, |
| 128 | "solMapVidMem: failed to open %s (%s)\n", |
| 129 | apertureDevName, strerror(errno)); |
| 130 | return NULL; |
| 131 | } |
| 132 | |
| 133 | base = mmap(NULL, Size, prot, MAP_SHARED, fd, (off_t) Base); |
| 134 | |
| 135 | if (base == MAP_FAILED) { |
| 136 | xf86DrvMsg(ScreenNum, X_ERROR, |
| 137 | "solMapVidMem: failed to mmap %s (0x%08lx,0x%lx) (%s)\n", |
| 138 | apertureDevName, Base, Size, strerror(errno)); |
| 139 | return NULL; |
| 140 | } |
| 141 | |
| 142 | return base; |
| 143 | } |
| 144 | |
| 145 | /* ARGSUSED */ |
| 146 | static void |
| 147 | solUnMapVidMem(int ScreenNum, pointer Base, unsigned long Size) |
| 148 | { |
| 149 | if (munmap(Base, Size) != 0) { |
| 150 | xf86DrvMsgVerb(ScreenNum, X_WARNING, 0, |
| 151 | "solUnMapVidMem: failed to unmap %s" |
| 152 | " (0x%p,0x%lx) (%s)\n", |
| 153 | apertureDevName, Base, Size, strerror(errno)); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | _X_HIDDEN void |
| 158 | xf86OSInitVidMem(VidMemInfoPtr pVidMem) |
| 159 | { |
| 160 | pVidMem->linearSupported = solOpenAperture(); |
| 161 | if (pVidMem->linearSupported) { |
| 162 | pVidMem->mapMem = solMapVidMem; |
| 163 | pVidMem->unmapMem = solUnMapVidMem; |
| 164 | } |
| 165 | else { |
| 166 | xf86MsgVerb(X_WARNING, 0, |
| 167 | "xf86OSInitVidMem: linear memory access disabled\n"); |
| 168 | } |
| 169 | pVidMem->initialised = TRUE; |
| 170 | } |
| 171 | |
| 172 | /* |
| 173 | * Read BIOS via mmap()ing physical memory. |
| 174 | */ |
| 175 | int |
| 176 | xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf, |
| 177 | int Len) |
| 178 | { |
| 179 | unsigned char *ptr; |
| 180 | int psize; |
| 181 | int mlen; |
| 182 | |
| 183 | psize = getpagesize(); |
| 184 | Offset += Base & (psize - 1); |
| 185 | Base &= ~(psize - 1); |
| 186 | mlen = (Offset + Len + psize - 1) & ~(psize - 1); |
| 187 | |
| 188 | if (solOpenAperture() == FALSE) { |
| 189 | xf86Msg(X_WARNING, |
| 190 | "xf86ReadBIOS: Failed to open aperture to read BIOS\n"); |
| 191 | return -1; |
| 192 | } |
| 193 | |
| 194 | ptr = (unsigned char *) mmap(NULL, mlen, PROT_READ, |
| 195 | MAP_SHARED, apertureDevFD_ro, (off_t) Base); |
| 196 | if (ptr == MAP_FAILED) { |
| 197 | xf86Msg(X_WARNING, "xf86ReadBIOS: %s mmap failed [0x%08lx, 0x%04x]\n", |
| 198 | apertureDevName, Base, mlen); |
| 199 | return -1; |
| 200 | } |
| 201 | |
| 202 | (void) memcpy(Buf, (void *) (ptr + Offset), Len); |
| 203 | if (munmap((caddr_t) ptr, mlen) != 0) { |
| 204 | xf86MsgVerb(X_WARNING, 0, |
| 205 | "xf86ReadBIOS: failed to unmap %s (0x%p,0x%x) (%s)\n", |
| 206 | apertureDevName, ptr, mlen, strerror(errno)); |
| 207 | } |
| 208 | |
| 209 | return Len; |
| 210 | } |
| 211 | |
| 212 | /***************************************************************************/ |
| 213 | /* I/O Permissions section */ |
| 214 | /***************************************************************************/ |
| 215 | |
| 216 | #if defined(__i386__) || defined(__i386) || defined(__x86) |
| 217 | static Bool ExtendedEnabled = FALSE; |
| 218 | #endif |
| 219 | |
| 220 | Bool |
| 221 | xf86EnableIO(void) |
| 222 | { |
| 223 | #if defined(__i386__) || defined(__i386) || defined(__x86) |
| 224 | if (ExtendedEnabled) |
| 225 | return TRUE; |
| 226 | |
| 227 | if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) < 0) { |
| 228 | xf86Msg(X_WARNING, "xf86EnableIOPorts: Failed to set IOPL for I/O\n"); |
| 229 | return FALSE; |
| 230 | } |
| 231 | ExtendedEnabled = TRUE; |
| 232 | #endif /* i386 */ |
| 233 | return TRUE; |
| 234 | } |
| 235 | |
| 236 | void |
| 237 | xf86DisableIO(void) |
| 238 | { |
| 239 | #if defined(__i386__) || defined(__i386) || defined(__x86) |
| 240 | if (!ExtendedEnabled) |
| 241 | return; |
| 242 | |
| 243 | sysi86(SI86V86, V86SC_IOPL, 0); |
| 244 | |
| 245 | ExtendedEnabled = FALSE; |
| 246 | #endif /* i386 */ |
| 247 | } |