1/* $NetBSD: openfirmio.c,v 1.4 2002/09/06 13:23:19 gehenna Exp $ */ 2 3/* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)openfirm.c 8.1 (Berkeley) 6/11/93 45 *
| 1/* $NetBSD: openfirmio.c,v 1.4 2002/09/06 13:23:19 gehenna Exp $ */ 2 3/* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)openfirm.c 8.1 (Berkeley) 6/11/93 45 *
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46 * $FreeBSD: head/sys/dev/ofw/openfirmio.c 111815 2003-03-03 12:15:54Z phk $
| 46 * $FreeBSD: head/sys/dev/ofw/openfirmio.c 116210 2003-06-11 18:33:03Z tmm $
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47 */ 48 49#include <sys/param.h> 50#include <sys/systm.h> 51#include <sys/conf.h> 52#include <sys/errno.h> 53#include <sys/fcntl.h> 54#include <sys/ioccom.h> 55#include <sys/kernel.h> 56#include <sys/malloc.h> 57#include <sys/module.h> 58 59#include <dev/ofw/openfirmio.h> 60 61static dev_t openfirm_dev; 62 63static d_ioctl_t openfirm_ioctl; 64
| 47 */ 48 49#include <sys/param.h> 50#include <sys/systm.h> 51#include <sys/conf.h> 52#include <sys/errno.h> 53#include <sys/fcntl.h> 54#include <sys/ioccom.h> 55#include <sys/kernel.h> 56#include <sys/malloc.h> 57#include <sys/module.h> 58 59#include <dev/ofw/openfirmio.h> 60 61static dev_t openfirm_dev; 62 63static d_ioctl_t openfirm_ioctl; 64
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65#define CDEV_MAJOR 177
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66#define OPENFIRM_MINOR 0 67 68static struct cdevsw openfirm_cdevsw = { 69 .d_open = nullopen, 70 .d_close = nullclose, 71 .d_ioctl = openfirm_ioctl, 72 .d_name = "openfirm",
| 65#define OPENFIRM_MINOR 0 66 67static struct cdevsw openfirm_cdevsw = { 68 .d_open = nullopen, 69 .d_close = nullclose, 70 .d_ioctl = openfirm_ioctl, 71 .d_name = "openfirm",
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73 .d_maj = CDEV_MAJOR,
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74}; 75 76static phandle_t lastnode; /* speed hack */ 77 78static int openfirm_checkid(phandle_t, phandle_t); 79static int openfirm_getstr(int, const char *, char **); 80 81/* Maximum accepted name length. */ 82#define OFW_NAME_MAX 8191 83 84/* 85 * Verify target ID is valid (exists in the OPENPROM tree), as 86 * listed from node ID sid forward. 87 */ 88static int 89openfirm_checkid(phandle_t sid, phandle_t tid) 90{ 91 92 for (; sid != 0; sid = OF_peer(sid)) 93 if (sid == tid || openfirm_checkid(OF_child(sid), tid)) 94 return (1); 95 96 return (0); 97} 98 99static int 100openfirm_getstr(int len, const char *user, char **cpp) 101{ 102 int error; 103 char *cp; 104 105 /* Reject obvious bogus requests */ 106 if ((u_int)len > OFW_NAME_MAX) 107 return (ENAMETOOLONG); 108 109 *cpp = cp = malloc(len + 1, M_TEMP, M_WAITOK); 110 if (cp == NULL) 111 return (ENOMEM); 112 error = copyin(user, cp, len); 113 cp[len] = '\0'; 114 return (error); 115} 116 117int 118openfirm_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags, 119 struct thread *td) 120{ 121 struct ofiocdesc *of; 122 phandle_t node; 123 int len, ok, error; 124 char *name, *value; 125 char newname[32]; 126
| 72}; 73 74static phandle_t lastnode; /* speed hack */ 75 76static int openfirm_checkid(phandle_t, phandle_t); 77static int openfirm_getstr(int, const char *, char **); 78 79/* Maximum accepted name length. */ 80#define OFW_NAME_MAX 8191 81 82/* 83 * Verify target ID is valid (exists in the OPENPROM tree), as 84 * listed from node ID sid forward. 85 */ 86static int 87openfirm_checkid(phandle_t sid, phandle_t tid) 88{ 89 90 for (; sid != 0; sid = OF_peer(sid)) 91 if (sid == tid || openfirm_checkid(OF_child(sid), tid)) 92 return (1); 93 94 return (0); 95} 96 97static int 98openfirm_getstr(int len, const char *user, char **cpp) 99{ 100 int error; 101 char *cp; 102 103 /* Reject obvious bogus requests */ 104 if ((u_int)len > OFW_NAME_MAX) 105 return (ENAMETOOLONG); 106 107 *cpp = cp = malloc(len + 1, M_TEMP, M_WAITOK); 108 if (cp == NULL) 109 return (ENOMEM); 110 error = copyin(user, cp, len); 111 cp[len] = '\0'; 112 return (error); 113} 114 115int 116openfirm_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags, 117 struct thread *td) 118{ 119 struct ofiocdesc *of; 120 phandle_t node; 121 int len, ok, error; 122 char *name, *value; 123 char newname[32]; 124
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| 125 if ((flags & FREAD) == 0) 126 return (EBADF); 127
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127 of = (struct ofiocdesc *)data; 128 switch (cmd) { 129 case OFIOCGETOPTNODE: 130 *(phandle_t *) data = OF_finddevice("/options"); 131 return (0); 132 case OFIOCGET: 133#if 0 134 case OFIOCSET: 135#endif 136 case OFIOCNEXTPROP: 137 case OFIOCFINDDEVICE:
| 128 of = (struct ofiocdesc *)data; 129 switch (cmd) { 130 case OFIOCGETOPTNODE: 131 *(phandle_t *) data = OF_finddevice("/options"); 132 return (0); 133 case OFIOCGET: 134#if 0 135 case OFIOCSET: 136#endif 137 case OFIOCNEXTPROP: 138 case OFIOCFINDDEVICE:
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| 139 case OFIOCGETPROPLEN:
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138 node = of->of_nodeid; 139 break; 140 case OFIOCGETNEXT: 141 case OFIOCGETCHILD: 142 node = *(phandle_t *)data; 143 break; 144 default:
| 140 node = of->of_nodeid; 141 break; 142 case OFIOCGETNEXT: 143 case OFIOCGETCHILD: 144 node = *(phandle_t *)data; 145 break; 146 default:
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145 return (ENOTTY);
| 147 return (ENOIOCTL);
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146 } 147 148 if (node != 0 && node != lastnode) { 149 /* Not an easy one, must search for it */ 150 ok = openfirm_checkid(OF_peer(0), node); 151 if (!ok) 152 return (EINVAL); 153 lastnode = node; 154 } 155 156 name = value = NULL; 157 error = 0; 158 switch (cmd) { 159 160 case OFIOCGET:
| 148 } 149 150 if (node != 0 && node != lastnode) { 151 /* Not an easy one, must search for it */ 152 ok = openfirm_checkid(OF_peer(0), node); 153 if (!ok) 154 return (EINVAL); 155 lastnode = node; 156 } 157 158 name = value = NULL; 159 error = 0; 160 switch (cmd) { 161 162 case OFIOCGET:
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161 if ((flags & FREAD) == 0) 162 return (EBADF);
| 163 case OFIOCGETPROPLEN:
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163 if (node == 0) 164 return (EINVAL); 165 error = openfirm_getstr(of->of_namelen, of->of_name, &name); 166 if (error) 167 break; 168 len = OF_getproplen(node, name);
| 164 if (node == 0) 165 return (EINVAL); 166 error = openfirm_getstr(of->of_namelen, of->of_name, &name); 167 if (error) 168 break; 169 len = OF_getproplen(node, name);
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| 170 if (cmd == OFIOCGETPROPLEN) { 171 of->of_buflen = len; 172 break; 173 }
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169 if (len > of->of_buflen) { 170 error = ENOMEM; 171 break; 172 } 173 of->of_buflen = len; 174 /* -1 means no entry; 0 means no value */ 175 if (len <= 0) 176 break; 177 value = malloc(len, M_TEMP, M_WAITOK); 178 if (value == NULL) { 179 error = ENOMEM; 180 break; 181 } 182 len = OF_getprop(node, name, (void *)value, len); 183 error = copyout(value, of->of_buf, len); 184 break; 185 186#if 0 187 case OFIOCSET: 188 if ((flags & FWRITE) == 0) 189 return (EBADF); 190 if (node == 0) 191 return (EINVAL); 192 error = openfirm_getstr(of->of_namelen, of->of_name, &name); 193 if (error) 194 break; 195 error = openfirm_getstr(of->of_buflen, of->of_buf, &value); 196 if (error) 197 break; 198 len = OF_setprop(node, name, value, of->of_buflen); 199 if (len != of->of_buflen) 200 error = EINVAL; 201 break; 202#endif 203 204 case OFIOCNEXTPROP:
| 174 if (len > of->of_buflen) { 175 error = ENOMEM; 176 break; 177 } 178 of->of_buflen = len; 179 /* -1 means no entry; 0 means no value */ 180 if (len <= 0) 181 break; 182 value = malloc(len, M_TEMP, M_WAITOK); 183 if (value == NULL) { 184 error = ENOMEM; 185 break; 186 } 187 len = OF_getprop(node, name, (void *)value, len); 188 error = copyout(value, of->of_buf, len); 189 break; 190 191#if 0 192 case OFIOCSET: 193 if ((flags & FWRITE) == 0) 194 return (EBADF); 195 if (node == 0) 196 return (EINVAL); 197 error = openfirm_getstr(of->of_namelen, of->of_name, &name); 198 if (error) 199 break; 200 error = openfirm_getstr(of->of_buflen, of->of_buf, &value); 201 if (error) 202 break; 203 len = OF_setprop(node, name, value, of->of_buflen); 204 if (len != of->of_buflen) 205 error = EINVAL; 206 break; 207#endif 208 209 case OFIOCNEXTPROP:
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205 if ((flags & FREAD) == 0) 206 return (EBADF);
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207 if (node == 0 || of->of_buflen < 0) 208 return (EINVAL); 209 if (of->of_namelen != 0) { 210 error = openfirm_getstr(of->of_namelen, of->of_name, 211 &name); 212 if (error) 213 break; 214 } 215 ok = OF_nextprop(node, name, newname); 216 if (ok == 0) { 217 error = ENOENT; 218 break; 219 } 220 if (ok == -1) { 221 error = EINVAL; 222 break; 223 } 224 len = strlen(newname) + 1; 225 if (len > of->of_buflen) 226 len = of->of_buflen; 227 else 228 of->of_buflen = len; 229 error = copyout(newname, of->of_buf, len); 230 break; 231 232 case OFIOCGETNEXT:
| 210 if (node == 0 || of->of_buflen < 0) 211 return (EINVAL); 212 if (of->of_namelen != 0) { 213 error = openfirm_getstr(of->of_namelen, of->of_name, 214 &name); 215 if (error) 216 break; 217 } 218 ok = OF_nextprop(node, name, newname); 219 if (ok == 0) { 220 error = ENOENT; 221 break; 222 } 223 if (ok == -1) { 224 error = EINVAL; 225 break; 226 } 227 len = strlen(newname) + 1; 228 if (len > of->of_buflen) 229 len = of->of_buflen; 230 else 231 of->of_buflen = len; 232 error = copyout(newname, of->of_buf, len); 233 break; 234 235 case OFIOCGETNEXT:
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233 if ((flags & FREAD) == 0) 234 return (EBADF);
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235 node = OF_peer(node); 236 *(phandle_t *)data = lastnode = node; 237 break; 238 239 case OFIOCGETCHILD:
| 236 node = OF_peer(node); 237 *(phandle_t *)data = lastnode = node; 238 break; 239 240 case OFIOCGETCHILD:
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240 if ((flags & FREAD) == 0) 241 return (EBADF);
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242 if (node == 0) 243 return (EINVAL); 244 node = OF_child(node); 245 *(phandle_t *)data = lastnode = node; 246 break; 247 248 case OFIOCFINDDEVICE:
| 241 if (node == 0) 242 return (EINVAL); 243 node = OF_child(node); 244 *(phandle_t *)data = lastnode = node; 245 break; 246 247 case OFIOCFINDDEVICE:
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249 if ((flags & FREAD) == 0) 250 return (EBADF);
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251 error = openfirm_getstr(of->of_namelen, of->of_name, &name); 252 if (error) 253 break; 254 node = OF_finddevice(name); 255 if (node == 0 || node == -1) { 256 error = ENOENT; 257 break; 258 } 259 of->of_nodeid = lastnode = node; 260 break; 261 } 262 263 if (name != NULL) 264 free(name, M_TEMP); 265 if (value != NULL) 266 free(value, M_TEMP); 267 268 return (error); 269} 270 271static int 272openfirm_modevent(module_t mod, int type, void *data) 273{ 274 switch(type) { 275 case MOD_LOAD: 276 if (bootverbose) 277 printf("openfirm: <OpenFirmware control device>\n"); 278 /* 279 * Allow only root access by default; this device may allow 280 * users to peek into firmware passwords, and likely to crash 281 * the machine on some boxen due to firmware quirks. 282 */ 283 openfirm_dev = make_dev(&openfirm_cdevsw, OPENFIRM_MINOR, 284 UID_ROOT, GID_WHEEL, 0600, "openfirm"); 285 return 0; 286 287 case MOD_UNLOAD: 288 destroy_dev(openfirm_dev); 289 return 0; 290 291 case MOD_SHUTDOWN: 292 return 0; 293 294 default: 295 return EOPNOTSUPP; 296 } 297} 298 299DEV_MODULE(openfirm, openfirm_modevent, NULL);
| 248 error = openfirm_getstr(of->of_namelen, of->of_name, &name); 249 if (error) 250 break; 251 node = OF_finddevice(name); 252 if (node == 0 || node == -1) { 253 error = ENOENT; 254 break; 255 } 256 of->of_nodeid = lastnode = node; 257 break; 258 } 259 260 if (name != NULL) 261 free(name, M_TEMP); 262 if (value != NULL) 263 free(value, M_TEMP); 264 265 return (error); 266} 267 268static int 269openfirm_modevent(module_t mod, int type, void *data) 270{ 271 switch(type) { 272 case MOD_LOAD: 273 if (bootverbose) 274 printf("openfirm: <OpenFirmware control device>\n"); 275 /* 276 * Allow only root access by default; this device may allow 277 * users to peek into firmware passwords, and likely to crash 278 * the machine on some boxen due to firmware quirks. 279 */ 280 openfirm_dev = make_dev(&openfirm_cdevsw, OPENFIRM_MINOR, 281 UID_ROOT, GID_WHEEL, 0600, "openfirm"); 282 return 0; 283 284 case MOD_UNLOAD: 285 destroy_dev(openfirm_dev); 286 return 0; 287 288 case MOD_SHUTDOWN: 289 return 0; 290 291 default: 292 return EOPNOTSUPP; 293 } 294} 295 296DEV_MODULE(openfirm, openfirm_modevent, NULL);
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