Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Uwe Zeisberger | f30c226 | 2006-10-03 23:01:26 +0200 | [diff] [blame] | 2 | * linux/drivers/firmware/edd.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Copyright (C) 2002, 2003, 2004 Dell Inc. |
| 4 | * by Matt Domsch <Matt_Domsch@dell.com> |
| 5 | * disk signature by Matt Domsch, Andrew Wilks, and Sandeep K. Shandilya |
| 6 | * legacy CHS by Patrick J. LoPresti <patl@users.sourceforge.net> |
| 7 | * |
| 8 | * BIOS Enhanced Disk Drive Services (EDD) |
| 9 | * conformant to T13 Committee www.t13.org |
| 10 | * projects 1572D, 1484D, 1386D, 1226DT |
| 11 | * |
| 12 | * This code takes information provided by BIOS EDD calls |
| 13 | * fn41 - Check Extensions Present and |
| 14 | * fn48 - Get Device Parametes with EDD extensions |
| 15 | * made in setup.S, copied to safe structures in setup.c, |
| 16 | * and presents it in sysfs. |
| 17 | * |
| 18 | * Please see http://linux.dell.com/edd30/results.html for |
| 19 | * the list of BIOSs which have been reported to implement EDD. |
| 20 | * |
| 21 | * This program is free software; you can redistribute it and/or modify |
| 22 | * it under the terms of the GNU General Public License v2.0 as published by |
| 23 | * the Free Software Foundation |
| 24 | * |
| 25 | * This program is distributed in the hope that it will be useful, |
| 26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 28 | * GNU General Public License for more details. |
| 29 | * |
| 30 | */ |
| 31 | |
| 32 | #include <linux/module.h> |
| 33 | #include <linux/string.h> |
| 34 | #include <linux/types.h> |
| 35 | #include <linux/init.h> |
| 36 | #include <linux/stat.h> |
| 37 | #include <linux/err.h> |
| 38 | #include <linux/ctype.h> |
| 39 | #include <linux/slab.h> |
| 40 | #include <linux/limits.h> |
| 41 | #include <linux/device.h> |
| 42 | #include <linux/pci.h> |
| 43 | #include <linux/blkdev.h> |
| 44 | #include <linux/edd.h> |
| 45 | |
| 46 | #define EDD_VERSION "0.16" |
| 47 | #define EDD_DATE "2004-Jun-25" |
| 48 | |
| 49 | MODULE_AUTHOR("Matt Domsch <Matt_Domsch@Dell.com>"); |
| 50 | MODULE_DESCRIPTION("sysfs interface to BIOS EDD information"); |
| 51 | MODULE_LICENSE("GPL"); |
| 52 | MODULE_VERSION(EDD_VERSION); |
| 53 | |
| 54 | #define left (PAGE_SIZE - (p - buf) - 1) |
| 55 | |
| 56 | struct edd_device { |
| 57 | unsigned int index; |
| 58 | unsigned int mbr_signature; |
| 59 | struct edd_info *info; |
| 60 | struct kobject kobj; |
| 61 | }; |
| 62 | |
| 63 | struct edd_attribute { |
| 64 | struct attribute attr; |
| 65 | ssize_t(*show) (struct edd_device * edev, char *buf); |
| 66 | int (*test) (struct edd_device * edev); |
| 67 | }; |
| 68 | |
| 69 | /* forward declarations */ |
| 70 | static int edd_dev_is_type(struct edd_device *edev, const char *type); |
| 71 | static struct pci_dev *edd_get_pci_dev(struct edd_device *edev); |
| 72 | |
| 73 | static struct edd_device *edd_devices[EDD_MBR_SIG_MAX]; |
| 74 | |
| 75 | #define EDD_DEVICE_ATTR(_name,_mode,_show,_test) \ |
| 76 | struct edd_attribute edd_attr_##_name = { \ |
Tejun Heo | 7b59575 | 2007-06-14 03:45:17 +0900 | [diff] [blame] | 77 | .attr = {.name = __stringify(_name), .mode = _mode }, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | .show = _show, \ |
| 79 | .test = _test, \ |
| 80 | }; |
| 81 | |
| 82 | static int |
| 83 | edd_has_mbr_signature(struct edd_device *edev) |
| 84 | { |
| 85 | return edev->index < min_t(unsigned char, edd.mbr_signature_nr, EDD_MBR_SIG_MAX); |
| 86 | } |
| 87 | |
| 88 | static int |
| 89 | edd_has_edd_info(struct edd_device *edev) |
| 90 | { |
| 91 | return edev->index < min_t(unsigned char, edd.edd_info_nr, EDDMAXNR); |
| 92 | } |
| 93 | |
| 94 | static inline struct edd_info * |
| 95 | edd_dev_get_info(struct edd_device *edev) |
| 96 | { |
| 97 | return edev->info; |
| 98 | } |
| 99 | |
| 100 | static inline void |
| 101 | edd_dev_set_info(struct edd_device *edev, int i) |
| 102 | { |
| 103 | edev->index = i; |
| 104 | if (edd_has_mbr_signature(edev)) |
| 105 | edev->mbr_signature = edd.mbr_signature[i]; |
| 106 | if (edd_has_edd_info(edev)) |
| 107 | edev->info = &edd.edd_info[i]; |
| 108 | } |
| 109 | |
| 110 | #define to_edd_attr(_attr) container_of(_attr,struct edd_attribute,attr) |
| 111 | #define to_edd_device(obj) container_of(obj,struct edd_device,kobj) |
| 112 | |
| 113 | static ssize_t |
| 114 | edd_attr_show(struct kobject * kobj, struct attribute *attr, char *buf) |
| 115 | { |
| 116 | struct edd_device *dev = to_edd_device(kobj); |
| 117 | struct edd_attribute *edd_attr = to_edd_attr(attr); |
Dmitry Torokhov | 70f2817 | 2005-04-29 01:27:34 -0500 | [diff] [blame] | 118 | ssize_t ret = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | if (edd_attr->show) |
| 121 | ret = edd_attr->show(dev, buf); |
| 122 | return ret; |
| 123 | } |
| 124 | |
| 125 | static struct sysfs_ops edd_attr_ops = { |
| 126 | .show = edd_attr_show, |
| 127 | }; |
| 128 | |
| 129 | static ssize_t |
| 130 | edd_show_host_bus(struct edd_device *edev, char *buf) |
| 131 | { |
| 132 | struct edd_info *info; |
| 133 | char *p = buf; |
| 134 | int i; |
| 135 | |
| 136 | if (!edev) |
| 137 | return -EINVAL; |
| 138 | info = edd_dev_get_info(edev); |
| 139 | if (!info || !buf) |
| 140 | return -EINVAL; |
| 141 | |
| 142 | for (i = 0; i < 4; i++) { |
| 143 | if (isprint(info->params.host_bus_type[i])) { |
| 144 | p += scnprintf(p, left, "%c", info->params.host_bus_type[i]); |
| 145 | } else { |
| 146 | p += scnprintf(p, left, " "); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | if (!strncmp(info->params.host_bus_type, "ISA", 3)) { |
| 151 | p += scnprintf(p, left, "\tbase_address: %x\n", |
| 152 | info->params.interface_path.isa.base_address); |
| 153 | } else if (!strncmp(info->params.host_bus_type, "PCIX", 4) || |
| 154 | !strncmp(info->params.host_bus_type, "PCI", 3)) { |
| 155 | p += scnprintf(p, left, |
| 156 | "\t%02x:%02x.%d channel: %u\n", |
| 157 | info->params.interface_path.pci.bus, |
| 158 | info->params.interface_path.pci.slot, |
| 159 | info->params.interface_path.pci.function, |
| 160 | info->params.interface_path.pci.channel); |
| 161 | } else if (!strncmp(info->params.host_bus_type, "IBND", 4) || |
| 162 | !strncmp(info->params.host_bus_type, "XPRS", 4) || |
| 163 | !strncmp(info->params.host_bus_type, "HTPT", 4)) { |
| 164 | p += scnprintf(p, left, |
| 165 | "\tTBD: %llx\n", |
| 166 | info->params.interface_path.ibnd.reserved); |
| 167 | |
| 168 | } else { |
| 169 | p += scnprintf(p, left, "\tunknown: %llx\n", |
| 170 | info->params.interface_path.unknown.reserved); |
| 171 | } |
| 172 | return (p - buf); |
| 173 | } |
| 174 | |
| 175 | static ssize_t |
| 176 | edd_show_interface(struct edd_device *edev, char *buf) |
| 177 | { |
| 178 | struct edd_info *info; |
| 179 | char *p = buf; |
| 180 | int i; |
| 181 | |
| 182 | if (!edev) |
| 183 | return -EINVAL; |
| 184 | info = edd_dev_get_info(edev); |
| 185 | if (!info || !buf) |
| 186 | return -EINVAL; |
| 187 | |
| 188 | for (i = 0; i < 8; i++) { |
| 189 | if (isprint(info->params.interface_type[i])) { |
| 190 | p += scnprintf(p, left, "%c", info->params.interface_type[i]); |
| 191 | } else { |
| 192 | p += scnprintf(p, left, " "); |
| 193 | } |
| 194 | } |
| 195 | if (!strncmp(info->params.interface_type, "ATAPI", 5)) { |
| 196 | p += scnprintf(p, left, "\tdevice: %u lun: %u\n", |
| 197 | info->params.device_path.atapi.device, |
| 198 | info->params.device_path.atapi.lun); |
| 199 | } else if (!strncmp(info->params.interface_type, "ATA", 3)) { |
| 200 | p += scnprintf(p, left, "\tdevice: %u\n", |
| 201 | info->params.device_path.ata.device); |
| 202 | } else if (!strncmp(info->params.interface_type, "SCSI", 4)) { |
| 203 | p += scnprintf(p, left, "\tid: %u lun: %llu\n", |
| 204 | info->params.device_path.scsi.id, |
| 205 | info->params.device_path.scsi.lun); |
| 206 | } else if (!strncmp(info->params.interface_type, "USB", 3)) { |
| 207 | p += scnprintf(p, left, "\tserial_number: %llx\n", |
| 208 | info->params.device_path.usb.serial_number); |
| 209 | } else if (!strncmp(info->params.interface_type, "1394", 4)) { |
| 210 | p += scnprintf(p, left, "\teui: %llx\n", |
| 211 | info->params.device_path.i1394.eui); |
| 212 | } else if (!strncmp(info->params.interface_type, "FIBRE", 5)) { |
| 213 | p += scnprintf(p, left, "\twwid: %llx lun: %llx\n", |
| 214 | info->params.device_path.fibre.wwid, |
| 215 | info->params.device_path.fibre.lun); |
| 216 | } else if (!strncmp(info->params.interface_type, "I2O", 3)) { |
| 217 | p += scnprintf(p, left, "\tidentity_tag: %llx\n", |
| 218 | info->params.device_path.i2o.identity_tag); |
| 219 | } else if (!strncmp(info->params.interface_type, "RAID", 4)) { |
| 220 | p += scnprintf(p, left, "\tidentity_tag: %x\n", |
| 221 | info->params.device_path.raid.array_number); |
| 222 | } else if (!strncmp(info->params.interface_type, "SATA", 4)) { |
| 223 | p += scnprintf(p, left, "\tdevice: %u\n", |
| 224 | info->params.device_path.sata.device); |
| 225 | } else { |
| 226 | p += scnprintf(p, left, "\tunknown: %llx %llx\n", |
| 227 | info->params.device_path.unknown.reserved1, |
| 228 | info->params.device_path.unknown.reserved2); |
| 229 | } |
| 230 | |
| 231 | return (p - buf); |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * edd_show_raw_data() - copies raw data to buffer for userspace to parse |
Randy Dunlap | 6e8c818 | 2007-02-10 01:46:03 -0800 | [diff] [blame] | 236 | * @edev: target edd_device |
| 237 | * @buf: output buffer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | * |
| 239 | * Returns: number of bytes written, or -EINVAL on failure |
| 240 | */ |
| 241 | static ssize_t |
| 242 | edd_show_raw_data(struct edd_device *edev, char *buf) |
| 243 | { |
| 244 | struct edd_info *info; |
| 245 | ssize_t len = sizeof (info->params); |
| 246 | if (!edev) |
| 247 | return -EINVAL; |
| 248 | info = edd_dev_get_info(edev); |
| 249 | if (!info || !buf) |
| 250 | return -EINVAL; |
| 251 | |
| 252 | if (!(info->params.key == 0xBEDD || info->params.key == 0xDDBE)) |
| 253 | len = info->params.length; |
| 254 | |
| 255 | /* In case of buggy BIOSs */ |
| 256 | if (len > (sizeof(info->params))) |
| 257 | len = sizeof(info->params); |
| 258 | |
| 259 | memcpy(buf, &info->params, len); |
| 260 | return len; |
| 261 | } |
| 262 | |
| 263 | static ssize_t |
| 264 | edd_show_version(struct edd_device *edev, char *buf) |
| 265 | { |
| 266 | struct edd_info *info; |
| 267 | char *p = buf; |
| 268 | if (!edev) |
| 269 | return -EINVAL; |
| 270 | info = edd_dev_get_info(edev); |
| 271 | if (!info || !buf) |
| 272 | return -EINVAL; |
| 273 | |
| 274 | p += scnprintf(p, left, "0x%02x\n", info->version); |
| 275 | return (p - buf); |
| 276 | } |
| 277 | |
| 278 | static ssize_t |
| 279 | edd_show_mbr_signature(struct edd_device *edev, char *buf) |
| 280 | { |
| 281 | char *p = buf; |
| 282 | p += scnprintf(p, left, "0x%08x\n", edev->mbr_signature); |
| 283 | return (p - buf); |
| 284 | } |
| 285 | |
| 286 | static ssize_t |
| 287 | edd_show_extensions(struct edd_device *edev, char *buf) |
| 288 | { |
| 289 | struct edd_info *info; |
| 290 | char *p = buf; |
| 291 | if (!edev) |
| 292 | return -EINVAL; |
| 293 | info = edd_dev_get_info(edev); |
| 294 | if (!info || !buf) |
| 295 | return -EINVAL; |
| 296 | |
| 297 | if (info->interface_support & EDD_EXT_FIXED_DISK_ACCESS) { |
| 298 | p += scnprintf(p, left, "Fixed disk access\n"); |
| 299 | } |
| 300 | if (info->interface_support & EDD_EXT_DEVICE_LOCKING_AND_EJECTING) { |
| 301 | p += scnprintf(p, left, "Device locking and ejecting\n"); |
| 302 | } |
| 303 | if (info->interface_support & EDD_EXT_ENHANCED_DISK_DRIVE_SUPPORT) { |
| 304 | p += scnprintf(p, left, "Enhanced Disk Drive support\n"); |
| 305 | } |
| 306 | if (info->interface_support & EDD_EXT_64BIT_EXTENSIONS) { |
| 307 | p += scnprintf(p, left, "64-bit extensions\n"); |
| 308 | } |
| 309 | return (p - buf); |
| 310 | } |
| 311 | |
| 312 | static ssize_t |
| 313 | edd_show_info_flags(struct edd_device *edev, char *buf) |
| 314 | { |
| 315 | struct edd_info *info; |
| 316 | char *p = buf; |
| 317 | if (!edev) |
| 318 | return -EINVAL; |
| 319 | info = edd_dev_get_info(edev); |
| 320 | if (!info || !buf) |
| 321 | return -EINVAL; |
| 322 | |
| 323 | if (info->params.info_flags & EDD_INFO_DMA_BOUNDARY_ERROR_TRANSPARENT) |
| 324 | p += scnprintf(p, left, "DMA boundary error transparent\n"); |
| 325 | if (info->params.info_flags & EDD_INFO_GEOMETRY_VALID) |
| 326 | p += scnprintf(p, left, "geometry valid\n"); |
| 327 | if (info->params.info_flags & EDD_INFO_REMOVABLE) |
| 328 | p += scnprintf(p, left, "removable\n"); |
| 329 | if (info->params.info_flags & EDD_INFO_WRITE_VERIFY) |
| 330 | p += scnprintf(p, left, "write verify\n"); |
| 331 | if (info->params.info_flags & EDD_INFO_MEDIA_CHANGE_NOTIFICATION) |
| 332 | p += scnprintf(p, left, "media change notification\n"); |
| 333 | if (info->params.info_flags & EDD_INFO_LOCKABLE) |
| 334 | p += scnprintf(p, left, "lockable\n"); |
| 335 | if (info->params.info_flags & EDD_INFO_NO_MEDIA_PRESENT) |
| 336 | p += scnprintf(p, left, "no media present\n"); |
| 337 | if (info->params.info_flags & EDD_INFO_USE_INT13_FN50) |
| 338 | p += scnprintf(p, left, "use int13 fn50\n"); |
| 339 | return (p - buf); |
| 340 | } |
| 341 | |
| 342 | static ssize_t |
| 343 | edd_show_legacy_max_cylinder(struct edd_device *edev, char *buf) |
| 344 | { |
| 345 | struct edd_info *info; |
| 346 | char *p = buf; |
| 347 | if (!edev) |
| 348 | return -EINVAL; |
| 349 | info = edd_dev_get_info(edev); |
| 350 | if (!info || !buf) |
| 351 | return -EINVAL; |
| 352 | |
| 353 | p += snprintf(p, left, "%u\n", info->legacy_max_cylinder); |
| 354 | return (p - buf); |
| 355 | } |
| 356 | |
| 357 | static ssize_t |
| 358 | edd_show_legacy_max_head(struct edd_device *edev, char *buf) |
| 359 | { |
| 360 | struct edd_info *info; |
| 361 | char *p = buf; |
| 362 | if (!edev) |
| 363 | return -EINVAL; |
| 364 | info = edd_dev_get_info(edev); |
| 365 | if (!info || !buf) |
| 366 | return -EINVAL; |
| 367 | |
| 368 | p += snprintf(p, left, "%u\n", info->legacy_max_head); |
| 369 | return (p - buf); |
| 370 | } |
| 371 | |
| 372 | static ssize_t |
| 373 | edd_show_legacy_sectors_per_track(struct edd_device *edev, char *buf) |
| 374 | { |
| 375 | struct edd_info *info; |
| 376 | char *p = buf; |
| 377 | if (!edev) |
| 378 | return -EINVAL; |
| 379 | info = edd_dev_get_info(edev); |
| 380 | if (!info || !buf) |
| 381 | return -EINVAL; |
| 382 | |
| 383 | p += snprintf(p, left, "%u\n", info->legacy_sectors_per_track); |
| 384 | return (p - buf); |
| 385 | } |
| 386 | |
| 387 | static ssize_t |
| 388 | edd_show_default_cylinders(struct edd_device *edev, char *buf) |
| 389 | { |
| 390 | struct edd_info *info; |
| 391 | char *p = buf; |
| 392 | if (!edev) |
| 393 | return -EINVAL; |
| 394 | info = edd_dev_get_info(edev); |
| 395 | if (!info || !buf) |
| 396 | return -EINVAL; |
| 397 | |
| 398 | p += scnprintf(p, left, "%u\n", info->params.num_default_cylinders); |
| 399 | return (p - buf); |
| 400 | } |
| 401 | |
| 402 | static ssize_t |
| 403 | edd_show_default_heads(struct edd_device *edev, char *buf) |
| 404 | { |
| 405 | struct edd_info *info; |
| 406 | char *p = buf; |
| 407 | if (!edev) |
| 408 | return -EINVAL; |
| 409 | info = edd_dev_get_info(edev); |
| 410 | if (!info || !buf) |
| 411 | return -EINVAL; |
| 412 | |
| 413 | p += scnprintf(p, left, "%u\n", info->params.num_default_heads); |
| 414 | return (p - buf); |
| 415 | } |
| 416 | |
| 417 | static ssize_t |
| 418 | edd_show_default_sectors_per_track(struct edd_device *edev, char *buf) |
| 419 | { |
| 420 | struct edd_info *info; |
| 421 | char *p = buf; |
| 422 | if (!edev) |
| 423 | return -EINVAL; |
| 424 | info = edd_dev_get_info(edev); |
| 425 | if (!info || !buf) |
| 426 | return -EINVAL; |
| 427 | |
| 428 | p += scnprintf(p, left, "%u\n", info->params.sectors_per_track); |
| 429 | return (p - buf); |
| 430 | } |
| 431 | |
| 432 | static ssize_t |
| 433 | edd_show_sectors(struct edd_device *edev, char *buf) |
| 434 | { |
| 435 | struct edd_info *info; |
| 436 | char *p = buf; |
| 437 | if (!edev) |
| 438 | return -EINVAL; |
| 439 | info = edd_dev_get_info(edev); |
| 440 | if (!info || !buf) |
| 441 | return -EINVAL; |
| 442 | |
| 443 | p += scnprintf(p, left, "%llu\n", info->params.number_of_sectors); |
| 444 | return (p - buf); |
| 445 | } |
| 446 | |
| 447 | |
| 448 | /* |
| 449 | * Some device instances may not have all the above attributes, |
| 450 | * or the attribute values may be meaningless (i.e. if |
| 451 | * the device is < EDD 3.0, it won't have host_bus and interface |
| 452 | * information), so don't bother making files for them. Likewise |
| 453 | * if the default_{cylinders,heads,sectors_per_track} values |
| 454 | * are zero, the BIOS doesn't provide sane values, don't bother |
| 455 | * creating files for them either. |
| 456 | */ |
| 457 | |
| 458 | static int |
| 459 | edd_has_legacy_max_cylinder(struct edd_device *edev) |
| 460 | { |
| 461 | struct edd_info *info; |
| 462 | if (!edev) |
| 463 | return 0; |
| 464 | info = edd_dev_get_info(edev); |
| 465 | if (!info) |
| 466 | return 0; |
| 467 | return info->legacy_max_cylinder > 0; |
| 468 | } |
| 469 | |
| 470 | static int |
| 471 | edd_has_legacy_max_head(struct edd_device *edev) |
| 472 | { |
| 473 | struct edd_info *info; |
| 474 | if (!edev) |
| 475 | return 0; |
| 476 | info = edd_dev_get_info(edev); |
| 477 | if (!info) |
| 478 | return 0; |
| 479 | return info->legacy_max_head > 0; |
| 480 | } |
| 481 | |
| 482 | static int |
| 483 | edd_has_legacy_sectors_per_track(struct edd_device *edev) |
| 484 | { |
| 485 | struct edd_info *info; |
| 486 | if (!edev) |
| 487 | return 0; |
| 488 | info = edd_dev_get_info(edev); |
| 489 | if (!info) |
| 490 | return 0; |
| 491 | return info->legacy_sectors_per_track > 0; |
| 492 | } |
| 493 | |
| 494 | static int |
| 495 | edd_has_default_cylinders(struct edd_device *edev) |
| 496 | { |
| 497 | struct edd_info *info; |
| 498 | if (!edev) |
| 499 | return 0; |
| 500 | info = edd_dev_get_info(edev); |
| 501 | if (!info) |
| 502 | return 0; |
| 503 | return info->params.num_default_cylinders > 0; |
| 504 | } |
| 505 | |
| 506 | static int |
| 507 | edd_has_default_heads(struct edd_device *edev) |
| 508 | { |
| 509 | struct edd_info *info; |
| 510 | if (!edev) |
| 511 | return 0; |
| 512 | info = edd_dev_get_info(edev); |
| 513 | if (!info) |
| 514 | return 0; |
| 515 | return info->params.num_default_heads > 0; |
| 516 | } |
| 517 | |
| 518 | static int |
| 519 | edd_has_default_sectors_per_track(struct edd_device *edev) |
| 520 | { |
| 521 | struct edd_info *info; |
| 522 | if (!edev) |
| 523 | return 0; |
| 524 | info = edd_dev_get_info(edev); |
| 525 | if (!info) |
| 526 | return 0; |
| 527 | return info->params.sectors_per_track > 0; |
| 528 | } |
| 529 | |
| 530 | static int |
| 531 | edd_has_edd30(struct edd_device *edev) |
| 532 | { |
| 533 | struct edd_info *info; |
| 534 | int i, nonzero_path = 0; |
| 535 | char c; |
| 536 | |
| 537 | if (!edev) |
| 538 | return 0; |
| 539 | info = edd_dev_get_info(edev); |
| 540 | if (!info) |
| 541 | return 0; |
| 542 | |
| 543 | if (!(info->params.key == 0xBEDD || info->params.key == 0xDDBE)) { |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | for (i = 30; i <= 73; i++) { |
| 548 | c = *(((uint8_t *) info) + i + 4); |
| 549 | if (c) { |
| 550 | nonzero_path++; |
| 551 | break; |
| 552 | } |
| 553 | } |
| 554 | if (!nonzero_path) { |
| 555 | return 0; |
| 556 | } |
| 557 | |
| 558 | return 1; |
| 559 | } |
| 560 | |
| 561 | |
| 562 | static EDD_DEVICE_ATTR(raw_data, 0444, edd_show_raw_data, edd_has_edd_info); |
| 563 | static EDD_DEVICE_ATTR(version, 0444, edd_show_version, edd_has_edd_info); |
| 564 | static EDD_DEVICE_ATTR(extensions, 0444, edd_show_extensions, edd_has_edd_info); |
| 565 | static EDD_DEVICE_ATTR(info_flags, 0444, edd_show_info_flags, edd_has_edd_info); |
| 566 | static EDD_DEVICE_ATTR(sectors, 0444, edd_show_sectors, edd_has_edd_info); |
| 567 | static EDD_DEVICE_ATTR(legacy_max_cylinder, 0444, |
| 568 | edd_show_legacy_max_cylinder, |
| 569 | edd_has_legacy_max_cylinder); |
| 570 | static EDD_DEVICE_ATTR(legacy_max_head, 0444, edd_show_legacy_max_head, |
| 571 | edd_has_legacy_max_head); |
| 572 | static EDD_DEVICE_ATTR(legacy_sectors_per_track, 0444, |
| 573 | edd_show_legacy_sectors_per_track, |
| 574 | edd_has_legacy_sectors_per_track); |
| 575 | static EDD_DEVICE_ATTR(default_cylinders, 0444, edd_show_default_cylinders, |
| 576 | edd_has_default_cylinders); |
| 577 | static EDD_DEVICE_ATTR(default_heads, 0444, edd_show_default_heads, |
| 578 | edd_has_default_heads); |
| 579 | static EDD_DEVICE_ATTR(default_sectors_per_track, 0444, |
| 580 | edd_show_default_sectors_per_track, |
| 581 | edd_has_default_sectors_per_track); |
| 582 | static EDD_DEVICE_ATTR(interface, 0444, edd_show_interface, edd_has_edd30); |
| 583 | static EDD_DEVICE_ATTR(host_bus, 0444, edd_show_host_bus, edd_has_edd30); |
| 584 | static EDD_DEVICE_ATTR(mbr_signature, 0444, edd_show_mbr_signature, edd_has_mbr_signature); |
| 585 | |
| 586 | |
| 587 | /* These are default attributes that are added for every edd |
| 588 | * device discovered. There are none. |
| 589 | */ |
| 590 | static struct attribute * def_attrs[] = { |
| 591 | NULL, |
| 592 | }; |
| 593 | |
| 594 | /* These attributes are conditional and only added for some devices. */ |
| 595 | static struct edd_attribute * edd_attrs[] = { |
| 596 | &edd_attr_raw_data, |
| 597 | &edd_attr_version, |
| 598 | &edd_attr_extensions, |
| 599 | &edd_attr_info_flags, |
| 600 | &edd_attr_sectors, |
| 601 | &edd_attr_legacy_max_cylinder, |
| 602 | &edd_attr_legacy_max_head, |
| 603 | &edd_attr_legacy_sectors_per_track, |
| 604 | &edd_attr_default_cylinders, |
| 605 | &edd_attr_default_heads, |
| 606 | &edd_attr_default_sectors_per_track, |
| 607 | &edd_attr_interface, |
| 608 | &edd_attr_host_bus, |
| 609 | &edd_attr_mbr_signature, |
| 610 | NULL, |
| 611 | }; |
| 612 | |
| 613 | /** |
| 614 | * edd_release - free edd structure |
| 615 | * @kobj: kobject of edd structure |
| 616 | * |
| 617 | * This is called when the refcount of the edd structure |
| 618 | * reaches 0. This should happen right after we unregister, |
| 619 | * but just in case, we use the release callback anyway. |
| 620 | */ |
| 621 | |
| 622 | static void edd_release(struct kobject * kobj) |
| 623 | { |
| 624 | struct edd_device * dev = to_edd_device(kobj); |
| 625 | kfree(dev); |
| 626 | } |
| 627 | |
Greg Kroah-Hartman | e89a411 | 2007-10-11 10:47:49 -0600 | [diff] [blame] | 628 | static struct kobj_type edd_ktype = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | .release = edd_release, |
| 630 | .sysfs_ops = &edd_attr_ops, |
| 631 | .default_attrs = def_attrs, |
| 632 | }; |
| 633 | |
Greg Kroah-Hartman | 9651d35 | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 634 | static struct kset *edd_kset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
| 636 | |
| 637 | /** |
| 638 | * edd_dev_is_type() - is this EDD device a 'type' device? |
Randy Dunlap | 6e8c818 | 2007-02-10 01:46:03 -0800 | [diff] [blame] | 639 | * @edev: target edd_device |
| 640 | * @type: a host bus or interface identifier string per the EDD spec |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | * |
| 642 | * Returns 1 (TRUE) if it is a 'type' device, 0 otherwise. |
| 643 | */ |
| 644 | static int |
| 645 | edd_dev_is_type(struct edd_device *edev, const char *type) |
| 646 | { |
| 647 | struct edd_info *info; |
| 648 | if (!edev) |
| 649 | return 0; |
| 650 | info = edd_dev_get_info(edev); |
| 651 | |
| 652 | if (type && info) { |
| 653 | if (!strncmp(info->params.host_bus_type, type, strlen(type)) || |
| 654 | !strncmp(info->params.interface_type, type, strlen(type))) |
| 655 | return 1; |
| 656 | } |
| 657 | return 0; |
| 658 | } |
| 659 | |
| 660 | /** |
| 661 | * edd_get_pci_dev() - finds pci_dev that matches edev |
Randy Dunlap | 6e8c818 | 2007-02-10 01:46:03 -0800 | [diff] [blame] | 662 | * @edev: edd_device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | * |
| 664 | * Returns pci_dev if found, or NULL |
| 665 | */ |
| 666 | static struct pci_dev * |
| 667 | edd_get_pci_dev(struct edd_device *edev) |
| 668 | { |
| 669 | struct edd_info *info = edd_dev_get_info(edev); |
| 670 | |
| 671 | if (edd_dev_is_type(edev, "PCI")) { |
Alan Cox | 1b28f22 | 2007-07-15 23:40:02 -0700 | [diff] [blame] | 672 | return pci_get_bus_and_slot(info->params.interface_path.pci.bus, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | PCI_DEVFN(info->params.interface_path.pci.slot, |
| 674 | info->params.interface_path.pci. |
| 675 | function)); |
| 676 | } |
| 677 | return NULL; |
| 678 | } |
| 679 | |
| 680 | static int |
| 681 | edd_create_symlink_to_pcidev(struct edd_device *edev) |
| 682 | { |
| 683 | |
| 684 | struct pci_dev *pci_dev = edd_get_pci_dev(edev); |
Alan Cox | 1b28f22 | 2007-07-15 23:40:02 -0700 | [diff] [blame] | 685 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | if (!pci_dev) |
| 687 | return 1; |
Alan Cox | 1b28f22 | 2007-07-15 23:40:02 -0700 | [diff] [blame] | 688 | ret = sysfs_create_link(&edev->kobj,&pci_dev->dev.kobj,"pci_dev"); |
| 689 | pci_dev_put(pci_dev); |
| 690 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | } |
| 692 | |
| 693 | static inline void |
| 694 | edd_device_unregister(struct edd_device *edev) |
| 695 | { |
| 696 | kobject_unregister(&edev->kobj); |
| 697 | } |
| 698 | |
| 699 | static void edd_populate_dir(struct edd_device * edev) |
| 700 | { |
| 701 | struct edd_attribute * attr; |
| 702 | int error = 0; |
| 703 | int i; |
| 704 | |
| 705 | for (i = 0; (attr = edd_attrs[i]) && !error; i++) { |
| 706 | if (!attr->test || |
| 707 | (attr->test && attr->test(edev))) |
| 708 | error = sysfs_create_file(&edev->kobj,&attr->attr); |
| 709 | } |
| 710 | |
| 711 | if (!error) { |
| 712 | edd_create_symlink_to_pcidev(edev); |
| 713 | } |
| 714 | } |
| 715 | |
| 716 | static int |
| 717 | edd_device_register(struct edd_device *edev, int i) |
| 718 | { |
| 719 | int error; |
| 720 | |
| 721 | if (!edev) |
| 722 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | edd_dev_set_info(edev, i); |
| 724 | kobject_set_name(&edev->kobj, "int13_dev%02x", |
| 725 | 0x80 + i); |
Greg Kroah-Hartman | 9651d35 | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 726 | edev->kobj.kset = edd_kset; |
Greg Kroah-Hartman | 3514fac | 2007-10-16 10:11:44 -0600 | [diff] [blame] | 727 | edev->kobj.ktype = &edd_ktype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | error = kobject_register(&edev->kobj); |
| 729 | if (!error) |
| 730 | edd_populate_dir(edev); |
| 731 | return error; |
| 732 | } |
| 733 | |
| 734 | static inline int edd_num_devices(void) |
| 735 | { |
| 736 | return max_t(unsigned char, |
| 737 | min_t(unsigned char, EDD_MBR_SIG_MAX, edd.mbr_signature_nr), |
| 738 | min_t(unsigned char, EDDMAXNR, edd.edd_info_nr)); |
| 739 | } |
| 740 | |
| 741 | /** |
| 742 | * edd_init() - creates sysfs tree of EDD data |
| 743 | */ |
| 744 | static int __init |
| 745 | edd_init(void) |
| 746 | { |
| 747 | unsigned int i; |
| 748 | int rc=0; |
| 749 | struct edd_device *edev; |
| 750 | |
| 751 | printk(KERN_INFO "BIOS EDD facility v%s %s, %d devices found\n", |
| 752 | EDD_VERSION, EDD_DATE, edd_num_devices()); |
| 753 | |
| 754 | if (!edd_num_devices()) { |
| 755 | printk(KERN_INFO "EDD information not available.\n"); |
| 756 | return 1; |
| 757 | } |
| 758 | |
Greg Kroah-Hartman | 9651d35 | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 759 | edd_kset = kset_create_and_add("edd", NULL, &firmware_kset->kobj); |
| 760 | if (!edd_kset) |
| 761 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | |
| 763 | for (i = 0; i < edd_num_devices() && !rc; i++) { |
Deepak Saxena | 9c21538 | 2005-11-07 01:01:24 -0800 | [diff] [blame] | 764 | edev = kzalloc(sizeof (*edev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | if (!edev) |
| 766 | return -ENOMEM; |
| 767 | |
| 768 | rc = edd_device_register(edev, i); |
| 769 | if (rc) { |
| 770 | kfree(edev); |
| 771 | break; |
| 772 | } |
| 773 | edd_devices[i] = edev; |
| 774 | } |
| 775 | |
| 776 | if (rc) |
Greg Kroah-Hartman | 9651d35 | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 777 | kset_unregister(edd_kset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | return rc; |
| 779 | } |
| 780 | |
| 781 | static void __exit |
| 782 | edd_exit(void) |
| 783 | { |
| 784 | int i; |
| 785 | struct edd_device *edev; |
| 786 | |
| 787 | for (i = 0; i < edd_num_devices(); i++) { |
| 788 | if ((edev = edd_devices[i])) |
| 789 | edd_device_unregister(edev); |
| 790 | } |
Greg Kroah-Hartman | 9651d35 | 2007-11-02 16:19:59 -0700 | [diff] [blame] | 791 | kset_unregister(edd_kset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | late_initcall(edd_init); |
| 795 | module_exit(edd_exit); |