Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Linux/SPARC PROM Configuration Driver |
| 3 | * Copyright (C) 1996 Thomas K. Dyas (tdyas@noc.rutgers.edu) |
| 4 | * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) |
| 5 | * |
| 6 | * This character device driver allows user programs to access the |
| 7 | * PROM device tree. It is compatible with the SunOS /dev/openprom |
| 8 | * driver and the NetBSD /dev/openprom driver. The SunOS eeprom |
| 9 | * utility works without any modifications. |
| 10 | * |
| 11 | * The driver uses a minor number under the misc device major. The |
| 12 | * file read/write mode determines the type of access to the PROM. |
| 13 | * Interrupts are disabled whenever the driver calls into the PROM for |
| 14 | * sanity's sake. |
| 15 | */ |
| 16 | |
| 17 | /* This program is free software; you can redistribute it and/or |
| 18 | * modify it under the terms of the GNU General Public License as |
| 19 | * published by the Free Software Foundation; either version 2 of the |
| 20 | * License, or (at your option) any later version. |
| 21 | * |
| 22 | * This program is distributed in the hope that it will be useful, but |
| 23 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 25 | * General Public License for more details. |
| 26 | * |
| 27 | * You should have received a copy of the GNU General Public License |
| 28 | * along with this program; if not, write to the Free Software |
| 29 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 30 | */ |
| 31 | |
| 32 | #define PROMLIB_INTERNAL |
| 33 | |
| 34 | #include <linux/config.h> |
| 35 | #include <linux/module.h> |
| 36 | #include <linux/kernel.h> |
| 37 | #include <linux/sched.h> |
| 38 | #include <linux/errno.h> |
| 39 | #include <linux/slab.h> |
| 40 | #include <linux/string.h> |
| 41 | #include <linux/miscdevice.h> |
Christoph Hellwig | b31023f | 2005-11-07 14:12:47 -0800 | [diff] [blame] | 42 | #include <linux/smp_lock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/init.h> |
| 44 | #include <linux/fs.h> |
| 45 | #include <asm/oplib.h> |
| 46 | #include <asm/system.h> |
| 47 | #include <asm/uaccess.h> |
| 48 | #include <asm/openpromio.h> |
| 49 | #ifdef CONFIG_PCI |
| 50 | #include <linux/pci.h> |
| 51 | #include <asm/pbm.h> |
| 52 | #endif |
| 53 | |
| 54 | /* Private data kept by the driver for each descriptor. */ |
| 55 | typedef struct openprom_private_data |
| 56 | { |
| 57 | int current_node; /* Current node for SunOS ioctls. */ |
| 58 | int lastnode; /* Last valid node used by BSD ioctls. */ |
| 59 | } DATA; |
| 60 | |
| 61 | /* ID of the PROM node containing all of the EEPROM options. */ |
| 62 | static int options_node = 0; |
| 63 | |
| 64 | /* |
| 65 | * Copy an openpromio structure into kernel space from user space. |
| 66 | * This routine does error checking to make sure that all memory |
| 67 | * accesses are within bounds. A pointer to the allocated openpromio |
| 68 | * structure will be placed in "*opp_p". Return value is the length |
| 69 | * of the user supplied buffer. |
| 70 | */ |
| 71 | static int copyin(struct openpromio __user *info, struct openpromio **opp_p) |
| 72 | { |
| 73 | unsigned int bufsize; |
| 74 | |
| 75 | if (!info || !opp_p) |
| 76 | return -EFAULT; |
| 77 | |
| 78 | if (get_user(bufsize, &info->oprom_size)) |
| 79 | return -EFAULT; |
| 80 | |
| 81 | if (bufsize == 0) |
| 82 | return -EINVAL; |
| 83 | |
| 84 | /* If the bufsize is too large, just limit it. |
| 85 | * Fix from Jason Rappleye. |
| 86 | */ |
| 87 | if (bufsize > OPROMMAXPARAM) |
| 88 | bufsize = OPROMMAXPARAM; |
| 89 | |
| 90 | if (!(*opp_p = kmalloc(sizeof(int) + bufsize + 1, GFP_KERNEL))) |
| 91 | return -ENOMEM; |
| 92 | memset(*opp_p, 0, sizeof(int) + bufsize + 1); |
| 93 | |
| 94 | if (copy_from_user(&(*opp_p)->oprom_array, |
| 95 | &info->oprom_array, bufsize)) { |
| 96 | kfree(*opp_p); |
| 97 | return -EFAULT; |
| 98 | } |
| 99 | return bufsize; |
| 100 | } |
| 101 | |
| 102 | static int getstrings(struct openpromio __user *info, struct openpromio **opp_p) |
| 103 | { |
| 104 | int n, bufsize; |
| 105 | char c; |
| 106 | |
| 107 | if (!info || !opp_p) |
| 108 | return -EFAULT; |
| 109 | |
| 110 | if (!(*opp_p = kmalloc(sizeof(int) + OPROMMAXPARAM + 1, GFP_KERNEL))) |
| 111 | return -ENOMEM; |
| 112 | |
| 113 | memset(*opp_p, 0, sizeof(int) + OPROMMAXPARAM + 1); |
| 114 | (*opp_p)->oprom_size = 0; |
| 115 | |
| 116 | n = bufsize = 0; |
| 117 | while ((n < 2) && (bufsize < OPROMMAXPARAM)) { |
| 118 | if (get_user(c, &info->oprom_array[bufsize])) { |
| 119 | kfree(*opp_p); |
| 120 | return -EFAULT; |
| 121 | } |
| 122 | if (c == '\0') |
| 123 | n++; |
| 124 | (*opp_p)->oprom_array[bufsize++] = c; |
| 125 | } |
| 126 | if (!n) { |
| 127 | kfree(*opp_p); |
| 128 | return -EINVAL; |
| 129 | } |
| 130 | return bufsize; |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | * Copy an openpromio structure in kernel space back to user space. |
| 135 | */ |
| 136 | static int copyout(void __user *info, struct openpromio *opp, int len) |
| 137 | { |
| 138 | if (copy_to_user(info, opp, len)) |
| 139 | return -EFAULT; |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | /* |
| 144 | * SunOS and Solaris /dev/openprom ioctl calls. |
| 145 | */ |
| 146 | static int openprom_sunos_ioctl(struct inode * inode, struct file * file, |
| 147 | unsigned int cmd, unsigned long arg, int node) |
| 148 | { |
| 149 | DATA *data = (DATA *) file->private_data; |
| 150 | char buffer[OPROMMAXPARAM+1], *buf; |
| 151 | struct openpromio *opp; |
| 152 | int bufsize, len, error = 0; |
| 153 | static int cnt; |
| 154 | void __user *argp = (void __user *)arg; |
| 155 | |
| 156 | if (cmd == OPROMSETOPT) |
| 157 | bufsize = getstrings(argp, &opp); |
| 158 | else |
| 159 | bufsize = copyin(argp, &opp); |
| 160 | |
| 161 | if (bufsize < 0) |
| 162 | return bufsize; |
| 163 | |
| 164 | switch (cmd) { |
| 165 | case OPROMGETOPT: |
| 166 | case OPROMGETPROP: |
| 167 | len = prom_getproplen(node, opp->oprom_array); |
| 168 | |
| 169 | if (len <= 0 || len > bufsize) { |
| 170 | error = copyout(argp, opp, sizeof(int)); |
| 171 | break; |
| 172 | } |
| 173 | |
| 174 | len = prom_getproperty(node, opp->oprom_array, buffer, bufsize); |
| 175 | |
| 176 | memcpy(opp->oprom_array, buffer, len); |
| 177 | opp->oprom_array[len] = '\0'; |
| 178 | opp->oprom_size = len; |
| 179 | |
| 180 | error = copyout(argp, opp, sizeof(int) + bufsize); |
| 181 | break; |
| 182 | |
| 183 | case OPROMNXTOPT: |
| 184 | case OPROMNXTPROP: |
| 185 | buf = prom_nextprop(node, opp->oprom_array, buffer); |
| 186 | |
| 187 | len = strlen(buf); |
| 188 | if (len == 0 || len + 1 > bufsize) { |
| 189 | error = copyout(argp, opp, sizeof(int)); |
| 190 | break; |
| 191 | } |
| 192 | |
| 193 | memcpy(opp->oprom_array, buf, len); |
| 194 | opp->oprom_array[len] = '\0'; |
| 195 | opp->oprom_size = ++len; |
| 196 | |
| 197 | error = copyout(argp, opp, sizeof(int) + bufsize); |
| 198 | break; |
| 199 | |
| 200 | case OPROMSETOPT: |
| 201 | case OPROMSETOPT2: |
| 202 | buf = opp->oprom_array + strlen(opp->oprom_array) + 1; |
| 203 | len = opp->oprom_array + bufsize - buf; |
| 204 | |
| 205 | error = prom_setprop(options_node, opp->oprom_array, |
| 206 | buf, len); |
| 207 | |
| 208 | if (error < 0) |
| 209 | error = -EINVAL; |
| 210 | break; |
| 211 | |
| 212 | case OPROMNEXT: |
| 213 | case OPROMCHILD: |
| 214 | case OPROMSETCUR: |
| 215 | if (bufsize < sizeof(int)) { |
| 216 | error = -EINVAL; |
| 217 | break; |
| 218 | } |
| 219 | |
| 220 | node = *((int *) opp->oprom_array); |
| 221 | |
| 222 | switch (cmd) { |
| 223 | case OPROMNEXT: node = __prom_getsibling(node); break; |
| 224 | case OPROMCHILD: node = __prom_getchild(node); break; |
| 225 | case OPROMSETCUR: break; |
| 226 | } |
| 227 | |
| 228 | data->current_node = node; |
| 229 | *((int *)opp->oprom_array) = node; |
| 230 | opp->oprom_size = sizeof(int); |
| 231 | |
| 232 | error = copyout(argp, opp, bufsize + sizeof(int)); |
| 233 | break; |
| 234 | |
| 235 | case OPROMPCI2NODE: |
| 236 | error = -EINVAL; |
| 237 | |
| 238 | if (bufsize >= 2*sizeof(int)) { |
| 239 | #ifdef CONFIG_PCI |
| 240 | struct pci_dev *pdev; |
| 241 | struct pcidev_cookie *pcp; |
| 242 | pdev = pci_find_slot (((int *) opp->oprom_array)[0], |
| 243 | ((int *) opp->oprom_array)[1]); |
| 244 | |
| 245 | pcp = pdev->sysdata; |
| 246 | if (pcp != NULL && pcp->prom_node != -1 && pcp->prom_node) { |
| 247 | node = pcp->prom_node; |
| 248 | data->current_node = node; |
| 249 | *((int *)opp->oprom_array) = node; |
| 250 | opp->oprom_size = sizeof(int); |
| 251 | error = copyout(argp, opp, bufsize + sizeof(int)); |
| 252 | } |
| 253 | #endif |
| 254 | } |
| 255 | break; |
| 256 | |
| 257 | case OPROMPATH2NODE: |
| 258 | node = prom_finddevice(opp->oprom_array); |
| 259 | data->current_node = node; |
| 260 | *((int *)opp->oprom_array) = node; |
| 261 | opp->oprom_size = sizeof(int); |
| 262 | |
| 263 | error = copyout(argp, opp, bufsize + sizeof(int)); |
| 264 | break; |
| 265 | |
| 266 | case OPROMGETBOOTARGS: |
| 267 | buf = saved_command_line; |
| 268 | |
| 269 | len = strlen(buf); |
| 270 | |
| 271 | if (len > bufsize) { |
| 272 | error = -EINVAL; |
| 273 | break; |
| 274 | } |
| 275 | |
| 276 | strcpy(opp->oprom_array, buf); |
| 277 | opp->oprom_size = len; |
| 278 | |
| 279 | error = copyout(argp, opp, bufsize + sizeof(int)); |
| 280 | break; |
| 281 | |
| 282 | case OPROMU2P: |
| 283 | case OPROMGETCONS: |
| 284 | case OPROMGETFBNAME: |
| 285 | if (cnt++ < 10) |
| 286 | printk(KERN_INFO "openprom_sunos_ioctl: unimplemented ioctl\n"); |
| 287 | error = -EINVAL; |
| 288 | break; |
| 289 | default: |
| 290 | if (cnt++ < 10) |
| 291 | printk(KERN_INFO "openprom_sunos_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg); |
| 292 | error = -EINVAL; |
| 293 | break; |
| 294 | } |
| 295 | |
| 296 | kfree(opp); |
| 297 | return error; |
| 298 | } |
| 299 | |
| 300 | |
| 301 | /* Return nonzero if a specific node is in the PROM device tree. */ |
| 302 | static int intree(int root, int node) |
| 303 | { |
| 304 | for (; root != 0; root = prom_getsibling(root)) |
| 305 | if (root == node || intree(prom_getchild(root),node)) |
| 306 | return 1; |
| 307 | return 0; |
| 308 | } |
| 309 | |
| 310 | /* Return nonzero if a specific node is "valid". */ |
| 311 | static int goodnode(int n, DATA *data) |
| 312 | { |
| 313 | if (n == data->lastnode || n == prom_root_node || n == options_node) |
| 314 | return 1; |
| 315 | if (n == 0 || n == -1 || !intree(prom_root_node,n)) |
| 316 | return 0; |
| 317 | data->lastnode = n; |
| 318 | return 1; |
| 319 | } |
| 320 | |
| 321 | /* Copy in a whole string from userspace into kernelspace. */ |
| 322 | static int copyin_string(char __user *user, size_t len, char **ptr) |
| 323 | { |
| 324 | char *tmp; |
| 325 | |
| 326 | if ((ssize_t)len < 0 || (ssize_t)(len + 1) < 0) |
| 327 | return -EINVAL; |
| 328 | |
| 329 | tmp = kmalloc(len + 1, GFP_KERNEL); |
| 330 | if (!tmp) |
| 331 | return -ENOMEM; |
| 332 | |
| 333 | if(copy_from_user(tmp, user, len)) { |
| 334 | kfree(tmp); |
| 335 | return -EFAULT; |
| 336 | } |
| 337 | |
| 338 | tmp[len] = '\0'; |
| 339 | |
| 340 | *ptr = tmp; |
| 341 | |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | /* |
| 346 | * NetBSD /dev/openprom ioctl calls. |
| 347 | */ |
| 348 | static int openprom_bsd_ioctl(struct inode * inode, struct file * file, |
| 349 | unsigned int cmd, unsigned long arg) |
| 350 | { |
| 351 | DATA *data = (DATA *) file->private_data; |
| 352 | void __user *argp = (void __user *)arg; |
| 353 | struct opiocdesc op; |
| 354 | int error, node, len; |
| 355 | char *str, *tmp; |
| 356 | char buffer[64]; |
| 357 | static int cnt; |
| 358 | |
| 359 | switch (cmd) { |
| 360 | case OPIOCGET: |
| 361 | if (copy_from_user(&op, argp, sizeof(op))) |
| 362 | return -EFAULT; |
| 363 | |
| 364 | if (!goodnode(op.op_nodeid,data)) |
| 365 | return -EINVAL; |
| 366 | |
| 367 | error = copyin_string(op.op_name, op.op_namelen, &str); |
| 368 | if (error) |
| 369 | return error; |
| 370 | |
| 371 | len = prom_getproplen(op.op_nodeid,str); |
| 372 | |
| 373 | if (len > op.op_buflen) { |
| 374 | kfree(str); |
| 375 | return -ENOMEM; |
| 376 | } |
| 377 | |
| 378 | op.op_buflen = len; |
| 379 | |
| 380 | if (len <= 0) { |
| 381 | kfree(str); |
| 382 | /* Verified by the above copy_from_user */ |
| 383 | if (__copy_to_user(argp, &op, |
| 384 | sizeof(op))) |
| 385 | return -EFAULT; |
| 386 | return 0; |
| 387 | } |
| 388 | |
| 389 | tmp = kmalloc(len + 1, GFP_KERNEL); |
| 390 | if (!tmp) { |
| 391 | kfree(str); |
| 392 | return -ENOMEM; |
| 393 | } |
| 394 | |
| 395 | prom_getproperty(op.op_nodeid, str, tmp, len); |
| 396 | |
| 397 | tmp[len] = '\0'; |
| 398 | |
| 399 | if (__copy_to_user(argp, &op, sizeof(op)) != 0 |
| 400 | || copy_to_user(op.op_buf, tmp, len) != 0) |
| 401 | error = -EFAULT; |
| 402 | |
| 403 | kfree(tmp); |
| 404 | kfree(str); |
| 405 | |
| 406 | return error; |
| 407 | |
| 408 | case OPIOCNEXTPROP: |
| 409 | if (copy_from_user(&op, argp, sizeof(op))) |
| 410 | return -EFAULT; |
| 411 | |
| 412 | if (!goodnode(op.op_nodeid,data)) |
| 413 | return -EINVAL; |
| 414 | |
| 415 | error = copyin_string(op.op_name, op.op_namelen, &str); |
| 416 | if (error) |
| 417 | return error; |
| 418 | |
| 419 | tmp = prom_nextprop(op.op_nodeid,str,buffer); |
| 420 | |
| 421 | if (tmp) { |
| 422 | len = strlen(tmp); |
| 423 | if (len > op.op_buflen) |
| 424 | len = op.op_buflen; |
| 425 | else |
| 426 | op.op_buflen = len; |
| 427 | } else { |
| 428 | len = op.op_buflen = 0; |
| 429 | } |
| 430 | |
| 431 | if (!access_ok(VERIFY_WRITE, argp, sizeof(op))) { |
| 432 | kfree(str); |
| 433 | return -EFAULT; |
| 434 | } |
| 435 | |
| 436 | if (!access_ok(VERIFY_WRITE, op.op_buf, len)) { |
| 437 | kfree(str); |
| 438 | return -EFAULT; |
| 439 | } |
| 440 | |
| 441 | error = __copy_to_user(argp, &op, sizeof(op)); |
| 442 | if (!error) error = __copy_to_user(op.op_buf, tmp, len); |
| 443 | |
| 444 | kfree(str); |
| 445 | |
| 446 | return error; |
| 447 | |
| 448 | case OPIOCSET: |
| 449 | if (copy_from_user(&op, argp, sizeof(op))) |
| 450 | return -EFAULT; |
| 451 | |
| 452 | if (!goodnode(op.op_nodeid,data)) |
| 453 | return -EINVAL; |
| 454 | |
| 455 | error = copyin_string(op.op_name, op.op_namelen, &str); |
| 456 | if (error) |
| 457 | return error; |
| 458 | |
| 459 | error = copyin_string(op.op_buf, op.op_buflen, &tmp); |
| 460 | if (error) { |
| 461 | kfree(str); |
| 462 | return error; |
| 463 | } |
| 464 | |
| 465 | len = prom_setprop(op.op_nodeid,str,tmp,op.op_buflen+1); |
| 466 | |
| 467 | if (len != op.op_buflen) |
| 468 | return -EINVAL; |
| 469 | |
| 470 | kfree(str); |
| 471 | kfree(tmp); |
| 472 | |
| 473 | return 0; |
| 474 | |
| 475 | case OPIOCGETOPTNODE: |
| 476 | if (copy_to_user(argp, &options_node, sizeof(int))) |
| 477 | return -EFAULT; |
| 478 | return 0; |
| 479 | |
| 480 | case OPIOCGETNEXT: |
| 481 | case OPIOCGETCHILD: |
| 482 | if (copy_from_user(&node, argp, sizeof(int))) |
| 483 | return -EFAULT; |
| 484 | |
| 485 | if (cmd == OPIOCGETNEXT) |
| 486 | node = __prom_getsibling(node); |
| 487 | else |
| 488 | node = __prom_getchild(node); |
| 489 | |
| 490 | if (__copy_to_user(argp, &node, sizeof(int))) |
| 491 | return -EFAULT; |
| 492 | |
| 493 | return 0; |
| 494 | |
| 495 | default: |
| 496 | if (cnt++ < 10) |
| 497 | printk(KERN_INFO "openprom_bsd_ioctl: cmd 0x%X\n", cmd); |
| 498 | return -EINVAL; |
| 499 | |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | |
| 504 | /* |
| 505 | * Handoff control to the correct ioctl handler. |
| 506 | */ |
| 507 | static int openprom_ioctl(struct inode * inode, struct file * file, |
| 508 | unsigned int cmd, unsigned long arg) |
| 509 | { |
| 510 | DATA *data = (DATA *) file->private_data; |
| 511 | static int cnt; |
| 512 | |
| 513 | switch (cmd) { |
| 514 | case OPROMGETOPT: |
| 515 | case OPROMNXTOPT: |
| 516 | if ((file->f_mode & FMODE_READ) == 0) |
| 517 | return -EPERM; |
| 518 | return openprom_sunos_ioctl(inode, file, cmd, arg, |
| 519 | options_node); |
| 520 | |
| 521 | case OPROMSETOPT: |
| 522 | case OPROMSETOPT2: |
| 523 | if ((file->f_mode & FMODE_WRITE) == 0) |
| 524 | return -EPERM; |
| 525 | return openprom_sunos_ioctl(inode, file, cmd, arg, |
| 526 | options_node); |
| 527 | |
| 528 | case OPROMNEXT: |
| 529 | case OPROMCHILD: |
| 530 | case OPROMGETPROP: |
| 531 | case OPROMNXTPROP: |
| 532 | if ((file->f_mode & FMODE_READ) == 0) |
| 533 | return -EPERM; |
| 534 | return openprom_sunos_ioctl(inode, file, cmd, arg, |
| 535 | data->current_node); |
| 536 | |
| 537 | case OPROMU2P: |
| 538 | case OPROMGETCONS: |
| 539 | case OPROMGETFBNAME: |
| 540 | case OPROMGETBOOTARGS: |
| 541 | case OPROMSETCUR: |
| 542 | case OPROMPCI2NODE: |
| 543 | case OPROMPATH2NODE: |
| 544 | if ((file->f_mode & FMODE_READ) == 0) |
| 545 | return -EPERM; |
| 546 | return openprom_sunos_ioctl(inode, file, cmd, arg, 0); |
| 547 | |
| 548 | case OPIOCGET: |
| 549 | case OPIOCNEXTPROP: |
| 550 | case OPIOCGETOPTNODE: |
| 551 | case OPIOCGETNEXT: |
| 552 | case OPIOCGETCHILD: |
| 553 | if ((file->f_mode & FMODE_READ) == 0) |
| 554 | return -EBADF; |
| 555 | return openprom_bsd_ioctl(inode,file,cmd,arg); |
| 556 | |
| 557 | case OPIOCSET: |
| 558 | if ((file->f_mode & FMODE_WRITE) == 0) |
| 559 | return -EBADF; |
| 560 | return openprom_bsd_ioctl(inode,file,cmd,arg); |
| 561 | |
| 562 | default: |
| 563 | if (cnt++ < 10) |
| 564 | printk("openprom_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg); |
| 565 | return -EINVAL; |
| 566 | } |
| 567 | } |
| 568 | |
Christoph Hellwig | b31023f | 2005-11-07 14:12:47 -0800 | [diff] [blame] | 569 | static long openprom_compat_ioctl(struct file *file, unsigned int cmd, |
| 570 | unsigned long arg) |
| 571 | { |
| 572 | long rval = -ENOTTY; |
| 573 | |
| 574 | /* |
| 575 | * SunOS/Solaris only, the NetBSD one's have embedded pointers in |
| 576 | * the arg which we'd need to clean up... |
| 577 | */ |
| 578 | switch (cmd) { |
| 579 | case OPROMGETOPT: |
| 580 | case OPROMSETOPT: |
| 581 | case OPROMNXTOPT: |
| 582 | case OPROMSETOPT2: |
| 583 | case OPROMNEXT: |
| 584 | case OPROMCHILD: |
| 585 | case OPROMGETPROP: |
| 586 | case OPROMNXTPROP: |
| 587 | case OPROMU2P: |
| 588 | case OPROMGETCONS: |
| 589 | case OPROMGETFBNAME: |
| 590 | case OPROMGETBOOTARGS: |
| 591 | case OPROMSETCUR: |
| 592 | case OPROMPCI2NODE: |
| 593 | case OPROMPATH2NODE: |
| 594 | lock_kernel(); |
| 595 | rval = openprom_ioctl(file->f_dentry->d_inode, file, cmd, arg); |
| 596 | lock_kernel(); |
| 597 | break; |
| 598 | } |
David S. Miller | d5a858b | 2005-11-08 10:00:13 -0800 | [diff] [blame] | 599 | |
| 600 | return rval; |
Christoph Hellwig | b31023f | 2005-11-07 14:12:47 -0800 | [diff] [blame] | 601 | } |
| 602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | static int openprom_open(struct inode * inode, struct file * file) |
| 604 | { |
| 605 | DATA *data; |
| 606 | |
| 607 | data = (DATA *) kmalloc(sizeof(DATA), GFP_KERNEL); |
| 608 | if (!data) |
| 609 | return -ENOMEM; |
| 610 | |
| 611 | data->current_node = prom_root_node; |
| 612 | data->lastnode = prom_root_node; |
| 613 | file->private_data = (void *)data; |
| 614 | |
| 615 | return 0; |
| 616 | } |
| 617 | |
| 618 | static int openprom_release(struct inode * inode, struct file * file) |
| 619 | { |
| 620 | kfree(file->private_data); |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | static struct file_operations openprom_fops = { |
| 625 | .owner = THIS_MODULE, |
| 626 | .llseek = no_llseek, |
| 627 | .ioctl = openprom_ioctl, |
David S. Miller | d5a858b | 2005-11-08 10:00:13 -0800 | [diff] [blame] | 628 | .compat_ioctl = openprom_compat_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | .open = openprom_open, |
| 630 | .release = openprom_release, |
| 631 | }; |
| 632 | |
| 633 | static struct miscdevice openprom_dev = { |
| 634 | SUN_OPENPROM_MINOR, "openprom", &openprom_fops |
| 635 | }; |
| 636 | |
| 637 | static int __init openprom_init(void) |
| 638 | { |
| 639 | int error; |
| 640 | |
| 641 | error = misc_register(&openprom_dev); |
| 642 | if (error) { |
| 643 | printk(KERN_ERR "openprom: unable to get misc minor\n"); |
| 644 | return error; |
| 645 | } |
| 646 | |
| 647 | options_node = prom_getchild(prom_root_node); |
| 648 | options_node = prom_searchsiblings(options_node,"options"); |
| 649 | |
| 650 | if (options_node == 0 || options_node == -1) { |
| 651 | printk(KERN_ERR "openprom: unable to find options node\n"); |
| 652 | misc_deregister(&openprom_dev); |
| 653 | return -EIO; |
| 654 | } |
| 655 | |
| 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | static void __exit openprom_cleanup(void) |
| 660 | { |
| 661 | misc_deregister(&openprom_dev); |
| 662 | } |
| 663 | |
| 664 | module_init(openprom_init); |
| 665 | module_exit(openprom_cleanup); |
| 666 | MODULE_LICENSE("GPL"); |