Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003 |
| 3 | * |
| 4 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
| 5 | */ |
| 6 | |
| 7 | /* |
| 8 | * Mostly written by Mark Lord <mlord@pobox.com> |
| 9 | * and Gadi Oxman <gadio@netvision.net.il> |
| 10 | * and Andre Hedrick <andre@linux-ide.org> |
| 11 | * |
| 12 | * See linux/MAINTAINERS for address of current maintainer. |
| 13 | * |
| 14 | * This is the multiple IDE interface driver, as evolved from hd.c. |
| 15 | * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs |
| 16 | * (usually 14 & 15). |
| 17 | * There can be up to two drives per interface, as per the ATA-2 spec. |
| 18 | * |
| 19 | * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64 |
| 20 | * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64 |
| 21 | * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64 |
| 22 | * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64 |
| 23 | * ... |
| 24 | * |
| 25 | * From hd.c: |
| 26 | * | |
| 27 | * | It traverses the request-list, using interrupts to jump between functions. |
| 28 | * | As nearly all functions can be called within interrupts, we may not sleep. |
| 29 | * | Special care is recommended. Have Fun! |
| 30 | * | |
| 31 | * | modified by Drew Eckhardt to check nr of hd's from the CMOS. |
| 32 | * | |
| 33 | * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug |
| 34 | * | in the early extended-partition checks and added DM partitions. |
| 35 | * | |
| 36 | * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI). |
| 37 | * | |
| 38 | * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads", |
| 39 | * | and general streamlining by Mark Lord (mlord@pobox.com). |
| 40 | * |
| 41 | * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by: |
| 42 | * |
| 43 | * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg) |
| 44 | * Delman Lee (delman@ieee.org) ("Mr. atdisk2") |
| 45 | * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom) |
| 46 | * |
| 47 | * This was a rewrite of just about everything from hd.c, though some original |
| 48 | * code is still sprinkled about. Think of it as a major evolution, with |
| 49 | * inspiration from lots of linux users, esp. hamish@zot.apana.org.au |
| 50 | * |
| 51 | * Version 1.0 ALPHA initial code, primary i/f working okay |
| 52 | * Version 1.3 BETA dual i/f on shared irq tested & working! |
| 53 | * Version 1.4 BETA added auto probing for irq(s) |
| 54 | * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms, |
| 55 | * ... |
| 56 | * Version 5.50 allow values as small as 20 for idebus= |
| 57 | * Version 5.51 force non io_32bit in drive_cmd_intr() |
| 58 | * change delay_10ms() to delay_50ms() to fix problems |
| 59 | * Version 5.52 fix incorrect invalidation of removable devices |
| 60 | * add "hdx=slow" command line option |
| 61 | * Version 5.60 start to modularize the driver; the disk and ATAPI |
| 62 | * drivers can be compiled as loadable modules. |
| 63 | * move IDE probe code to ide-probe.c |
| 64 | * move IDE disk code to ide-disk.c |
| 65 | * add support for generic IDE device subdrivers |
| 66 | * add m68k code from Geert Uytterhoeven |
| 67 | * probe all interfaces by default |
| 68 | * add ioctl to (re)probe an interface |
| 69 | * Version 6.00 use per device request queues |
| 70 | * attempt to optimize shared hwgroup performance |
| 71 | * add ioctl to manually adjust bandwidth algorithms |
| 72 | * add kerneld support for the probe module |
| 73 | * fix bug in ide_error() |
| 74 | * fix bug in the first ide_get_lock() call for Atari |
| 75 | * don't flush leftover data for ATAPI devices |
| 76 | * Version 6.01 clear hwgroup->active while the hwgroup sleeps |
| 77 | * support HDIO_GETGEO for floppies |
| 78 | * Version 6.02 fix ide_ack_intr() call |
| 79 | * check partition table on floppies |
| 80 | * Version 6.03 handle bad status bit sequencing in ide_wait_stat() |
| 81 | * Version 6.10 deleted old entries from this list of updates |
| 82 | * replaced triton.c with ide-dma.c generic PCI DMA |
| 83 | * added support for BIOS-enabled UltraDMA |
| 84 | * rename all "promise" things to "pdc4030" |
| 85 | * fix EZ-DRIVE handling on small disks |
| 86 | * Version 6.11 fix probe error in ide_scan_devices() |
| 87 | * fix ancient "jiffies" polling bugs |
| 88 | * mask all hwgroup interrupts on each irq entry |
| 89 | * Version 6.12 integrate ioctl and proc interfaces |
| 90 | * fix parsing of "idex=" command line parameter |
| 91 | * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com |
| 92 | * Version 6.14 fixed IRQ sharing among PCI devices |
| 93 | * Version 6.15 added SMP awareness to IDE drivers |
| 94 | * Version 6.16 fixed various bugs; even more SMP friendly |
| 95 | * Version 6.17 fix for newest EZ-Drive problem |
| 96 | * Version 6.18 default unpartitioned-disk translation now "BIOS LBA" |
| 97 | * Version 6.19 Re-design for a UNIFORM driver for all platforms, |
| 98 | * model based on suggestions from Russell King and |
| 99 | * Geert Uytterhoeven |
| 100 | * Promise DC4030VL now supported. |
| 101 | * add support for ide6/ide7 |
| 102 | * delay_50ms() changed to ide_delay_50ms() and exported. |
| 103 | * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection. |
| 104 | * Added hdx=flash to allow for second flash disk |
| 105 | * detection w/o the hang loop. |
| 106 | * Added support for ide8/ide9 |
| 107 | * Added idex=ata66 for the quirky chipsets that are |
| 108 | * ATA-66 compliant, but have yet to determine a method |
| 109 | * of verification of the 80c cable presence. |
| 110 | * Specifically Promise's PDC20262 chipset. |
| 111 | * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old |
| 112 | * hat that clarified original low level driver design. |
| 113 | * Version 6.30 Added SMP support; fixed multmode issues. -ml |
| 114 | * Version 6.31 Debug Share INTR's and request queue streaming |
| 115 | * Native ATA-100 support |
| 116 | * Prep for Cascades Project |
| 117 | * Version 7.00alpha First named revision of ide rearrange |
| 118 | * |
| 119 | * Some additional driver compile-time options are in ./include/linux/ide.h |
| 120 | * |
| 121 | * To do, in likely order of completion: |
| 122 | * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f |
| 123 | * |
| 124 | */ |
| 125 | |
| 126 | #define REVISION "Revision: 7.00alpha2" |
| 127 | #define VERSION "Id: ide.c 7.00a2 20020906" |
| 128 | |
| 129 | #undef REALLY_SLOW_IO /* most systems can safely undef this */ |
| 130 | |
| 131 | #define _IDE_C /* Tell ide.h it's really us */ |
| 132 | |
| 133 | #include <linux/config.h> |
| 134 | #include <linux/module.h> |
| 135 | #include <linux/types.h> |
| 136 | #include <linux/string.h> |
| 137 | #include <linux/kernel.h> |
| 138 | #include <linux/timer.h> |
| 139 | #include <linux/mm.h> |
| 140 | #include <linux/interrupt.h> |
| 141 | #include <linux/major.h> |
| 142 | #include <linux/errno.h> |
| 143 | #include <linux/genhd.h> |
| 144 | #include <linux/blkpg.h> |
| 145 | #include <linux/slab.h> |
| 146 | #include <linux/init.h> |
| 147 | #include <linux/pci.h> |
| 148 | #include <linux/delay.h> |
| 149 | #include <linux/ide.h> |
| 150 | #include <linux/devfs_fs_kernel.h> |
| 151 | #include <linux/completion.h> |
| 152 | #include <linux/reboot.h> |
| 153 | #include <linux/cdrom.h> |
| 154 | #include <linux/seq_file.h> |
| 155 | #include <linux/device.h> |
| 156 | #include <linux/bitops.h> |
| 157 | |
| 158 | #include <asm/byteorder.h> |
| 159 | #include <asm/irq.h> |
| 160 | #include <asm/uaccess.h> |
| 161 | #include <asm/io.h> |
| 162 | |
| 163 | |
| 164 | /* default maximum number of failures */ |
| 165 | #define IDE_DEFAULT_MAX_FAILURES 1 |
| 166 | |
| 167 | static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, |
| 168 | IDE2_MAJOR, IDE3_MAJOR, |
| 169 | IDE4_MAJOR, IDE5_MAJOR, |
| 170 | IDE6_MAJOR, IDE7_MAJOR, |
| 171 | IDE8_MAJOR, IDE9_MAJOR }; |
| 172 | |
| 173 | static int idebus_parameter; /* holds the "idebus=" parameter */ |
| 174 | static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ |
| 175 | static int initializing; /* set while initializing built-in drivers */ |
| 176 | |
| 177 | DECLARE_MUTEX(ide_cfg_sem); |
| 178 | __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); |
| 179 | |
| 180 | #ifdef CONFIG_BLK_DEV_IDEPCI |
| 181 | static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */ |
| 182 | #endif |
| 183 | |
| 184 | #ifdef CONFIG_IDEDMA_AUTO |
| 185 | int noautodma = 0; |
| 186 | #else |
| 187 | int noautodma = 1; |
| 188 | #endif |
| 189 | |
| 190 | EXPORT_SYMBOL(noautodma); |
| 191 | |
| 192 | /* |
| 193 | * This is declared extern in ide.h, for access by other IDE modules: |
| 194 | */ |
| 195 | ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ |
| 196 | |
| 197 | EXPORT_SYMBOL(ide_hwifs); |
| 198 | |
| 199 | static struct list_head ide_drives = LIST_HEAD_INIT(ide_drives); |
| 200 | |
| 201 | /* |
| 202 | * Do not even *think* about calling this! |
| 203 | */ |
| 204 | static void init_hwif_data(ide_hwif_t *hwif, unsigned int index) |
| 205 | { |
| 206 | unsigned int unit; |
| 207 | |
| 208 | /* bulk initialize hwif & drive info with zeros */ |
| 209 | memset(hwif, 0, sizeof(ide_hwif_t)); |
| 210 | |
| 211 | /* fill in any non-zero initial values */ |
| 212 | hwif->index = index; |
| 213 | hwif->major = ide_hwif_to_major[index]; |
| 214 | |
| 215 | hwif->name[0] = 'i'; |
| 216 | hwif->name[1] = 'd'; |
| 217 | hwif->name[2] = 'e'; |
| 218 | hwif->name[3] = '0' + index; |
| 219 | |
| 220 | hwif->bus_state = BUSSTATE_ON; |
| 221 | |
| 222 | hwif->atapi_dma = 0; /* disable all atapi dma */ |
| 223 | hwif->ultra_mask = 0x80; /* disable all ultra */ |
| 224 | hwif->mwdma_mask = 0x80; /* disable all mwdma */ |
| 225 | hwif->swdma_mask = 0x80; /* disable all swdma */ |
| 226 | |
| 227 | sema_init(&hwif->gendev_rel_sem, 0); |
| 228 | |
| 229 | default_hwif_iops(hwif); |
| 230 | default_hwif_transport(hwif); |
| 231 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| 232 | ide_drive_t *drive = &hwif->drives[unit]; |
| 233 | |
| 234 | drive->media = ide_disk; |
| 235 | drive->select.all = (unit<<4)|0xa0; |
| 236 | drive->hwif = hwif; |
| 237 | drive->ctl = 0x08; |
| 238 | drive->ready_stat = READY_STAT; |
| 239 | drive->bad_wstat = BAD_W_STAT; |
| 240 | drive->special.b.recalibrate = 1; |
| 241 | drive->special.b.set_geometry = 1; |
| 242 | drive->name[0] = 'h'; |
| 243 | drive->name[1] = 'd'; |
| 244 | drive->name[2] = 'a' + (index * MAX_DRIVES) + unit; |
| 245 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; |
| 246 | drive->using_dma = 0; |
| 247 | drive->is_flash = 0; |
| 248 | drive->vdma = 0; |
| 249 | INIT_LIST_HEAD(&drive->list); |
| 250 | sema_init(&drive->gendev_rel_sem, 0); |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) |
| 255 | { |
| 256 | hw_regs_t hw; |
| 257 | |
| 258 | memset(&hw, 0, sizeof(hw_regs_t)); |
| 259 | |
| 260 | ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); |
| 261 | |
| 262 | memcpy(&hwif->hw, &hw, sizeof(hw)); |
| 263 | memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); |
| 264 | |
| 265 | hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; |
| 266 | #ifdef CONFIG_BLK_DEV_HD |
| 267 | if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) |
| 268 | hwif->noprobe = 1; /* may be overridden by ide_setup() */ |
| 269 | #endif |
| 270 | } |
| 271 | |
| 272 | extern void ide_arm_init(void); |
| 273 | |
| 274 | /* |
| 275 | * init_ide_data() sets reasonable default values into all fields |
| 276 | * of all instances of the hwifs and drives, but only on the first call. |
| 277 | * Subsequent calls have no effect (they don't wipe out anything). |
| 278 | * |
| 279 | * This routine is normally called at driver initialization time, |
| 280 | * but may also be called MUCH earlier during kernel "command-line" |
| 281 | * parameter processing. As such, we cannot depend on any other parts |
| 282 | * of the kernel (such as memory allocation) to be functioning yet. |
| 283 | * |
| 284 | * This is too bad, as otherwise we could dynamically allocate the |
| 285 | * ide_drive_t structs as needed, rather than always consuming memory |
| 286 | * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. |
| 287 | * |
| 288 | * FIXME: We should stuff the setup data into __init and copy the |
| 289 | * relevant hwifs/allocate them properly during boot. |
| 290 | */ |
| 291 | #define MAGIC_COOKIE 0x12345678 |
| 292 | static void __init init_ide_data (void) |
| 293 | { |
| 294 | ide_hwif_t *hwif; |
| 295 | unsigned int index; |
| 296 | static unsigned long magic_cookie = MAGIC_COOKIE; |
| 297 | |
| 298 | if (magic_cookie != MAGIC_COOKIE) |
| 299 | return; /* already initialized */ |
| 300 | magic_cookie = 0; |
| 301 | |
| 302 | /* Initialise all interface structures */ |
| 303 | for (index = 0; index < MAX_HWIFS; ++index) { |
| 304 | hwif = &ide_hwifs[index]; |
| 305 | init_hwif_data(hwif, index); |
| 306 | init_hwif_default(hwif, index); |
| 307 | #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) |
| 308 | hwif->irq = hwif->hw.irq = |
| 309 | ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); |
| 310 | #endif |
| 311 | } |
| 312 | #ifdef CONFIG_IDE_ARM |
| 313 | initializing = 1; |
| 314 | ide_arm_init(); |
| 315 | initializing = 0; |
| 316 | #endif |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * ide_system_bus_speed - guess bus speed |
| 321 | * |
| 322 | * ide_system_bus_speed() returns what we think is the system VESA/PCI |
| 323 | * bus speed (in MHz). This is used for calculating interface PIO timings. |
| 324 | * The default is 40 for known PCI systems, 50 otherwise. |
| 325 | * The "idebus=xx" parameter can be used to override this value. |
| 326 | * The actual value to be used is computed/displayed the first time |
| 327 | * through. Drivers should only use this as a last resort. |
| 328 | * |
| 329 | * Returns a guessed speed in MHz. |
| 330 | */ |
| 331 | |
| 332 | static int ide_system_bus_speed(void) |
| 333 | { |
| 334 | #ifdef CONFIG_PCI |
| 335 | static struct pci_device_id pci_default[] = { |
| 336 | { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, |
| 337 | { } |
| 338 | }; |
| 339 | #else |
| 340 | #define pci_default 0 |
| 341 | #endif /* CONFIG_PCI */ |
| 342 | |
| 343 | if (!system_bus_speed) { |
| 344 | if (idebus_parameter) { |
| 345 | /* user supplied value */ |
| 346 | system_bus_speed = idebus_parameter; |
| 347 | } else if (pci_dev_present(pci_default)) { |
| 348 | /* safe default value for PCI */ |
| 349 | system_bus_speed = 33; |
| 350 | } else { |
| 351 | /* safe default value for VESA and PCI */ |
| 352 | system_bus_speed = 50; |
| 353 | } |
| 354 | printk(KERN_INFO "ide: Assuming %dMHz system bus speed " |
| 355 | "for PIO modes%s\n", system_bus_speed, |
| 356 | idebus_parameter ? "" : "; override with idebus=xx"); |
| 357 | } |
| 358 | return system_bus_speed; |
| 359 | } |
| 360 | |
| 361 | /* |
| 362 | * drives_lock protects the list of drives, drivers_lock the |
| 363 | * list of drivers. Currently nobody takes both at once. |
| 364 | */ |
| 365 | |
| 366 | static DEFINE_SPINLOCK(drives_lock); |
| 367 | static DEFINE_SPINLOCK(drivers_lock); |
| 368 | static LIST_HEAD(drivers); |
| 369 | |
| 370 | /* Iterator for the driver list. */ |
| 371 | |
| 372 | static void *m_start(struct seq_file *m, loff_t *pos) |
| 373 | { |
| 374 | struct list_head *p; |
| 375 | loff_t l = *pos; |
| 376 | spin_lock(&drivers_lock); |
| 377 | list_for_each(p, &drivers) |
| 378 | if (!l--) |
| 379 | return list_entry(p, ide_driver_t, drivers); |
| 380 | return NULL; |
| 381 | } |
| 382 | |
| 383 | static void *m_next(struct seq_file *m, void *v, loff_t *pos) |
| 384 | { |
| 385 | struct list_head *p = ((ide_driver_t *)v)->drivers.next; |
| 386 | (*pos)++; |
| 387 | return p==&drivers ? NULL : list_entry(p, ide_driver_t, drivers); |
| 388 | } |
| 389 | |
| 390 | static void m_stop(struct seq_file *m, void *v) |
| 391 | { |
| 392 | spin_unlock(&drivers_lock); |
| 393 | } |
| 394 | |
| 395 | static int show_driver(struct seq_file *m, void *v) |
| 396 | { |
| 397 | ide_driver_t *driver = v; |
| 398 | seq_printf(m, "%s version %s\n", driver->name, driver->version); |
| 399 | return 0; |
| 400 | } |
| 401 | |
| 402 | struct seq_operations ide_drivers_op = { |
| 403 | .start = m_start, |
| 404 | .next = m_next, |
| 405 | .stop = m_stop, |
| 406 | .show = show_driver |
| 407 | }; |
| 408 | |
| 409 | #ifdef CONFIG_PROC_FS |
| 410 | struct proc_dir_entry *proc_ide_root; |
| 411 | #endif |
| 412 | |
| 413 | static struct resource* hwif_request_region(ide_hwif_t *hwif, |
| 414 | unsigned long addr, int num) |
| 415 | { |
| 416 | struct resource *res = request_region(addr, num, hwif->name); |
| 417 | |
| 418 | if (!res) |
| 419 | printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", |
| 420 | hwif->name, addr, addr+num-1); |
| 421 | return res; |
| 422 | } |
| 423 | |
| 424 | /** |
| 425 | * ide_hwif_request_regions - request resources for IDE |
| 426 | * @hwif: interface to use |
| 427 | * |
| 428 | * Requests all the needed resources for an interface. |
| 429 | * Right now core IDE code does this work which is deeply wrong. |
| 430 | * MMIO leaves it to the controller driver, |
| 431 | * PIO will migrate this way over time. |
| 432 | */ |
| 433 | |
| 434 | int ide_hwif_request_regions(ide_hwif_t *hwif) |
| 435 | { |
| 436 | unsigned long addr; |
| 437 | unsigned int i; |
| 438 | |
| 439 | if (hwif->mmio == 2) |
| 440 | return 0; |
| 441 | BUG_ON(hwif->mmio == 1); |
| 442 | addr = hwif->io_ports[IDE_CONTROL_OFFSET]; |
| 443 | if (addr && !hwif_request_region(hwif, addr, 1)) |
| 444 | goto control_region_busy; |
| 445 | hwif->straight8 = 0; |
| 446 | addr = hwif->io_ports[IDE_DATA_OFFSET]; |
| 447 | if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { |
| 448 | if (!hwif_request_region(hwif, addr, 8)) |
| 449 | goto data_region_busy; |
| 450 | hwif->straight8 = 1; |
| 451 | return 0; |
| 452 | } |
| 453 | for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { |
| 454 | addr = hwif->io_ports[i]; |
| 455 | if (!hwif_request_region(hwif, addr, 1)) { |
| 456 | while (--i) |
| 457 | release_region(addr, 1); |
| 458 | goto data_region_busy; |
| 459 | } |
| 460 | } |
| 461 | return 0; |
| 462 | |
| 463 | data_region_busy: |
| 464 | addr = hwif->io_ports[IDE_CONTROL_OFFSET]; |
| 465 | if (addr) |
| 466 | release_region(addr, 1); |
| 467 | control_region_busy: |
| 468 | /* If any errors are return, we drop the hwif interface. */ |
| 469 | return -EBUSY; |
| 470 | } |
| 471 | |
| 472 | /** |
| 473 | * ide_hwif_release_regions - free IDE resources |
| 474 | * |
| 475 | * Note that we only release the standard ports, |
| 476 | * and do not even try to handle any extra ports |
| 477 | * allocated for weird IDE interface chipsets. |
| 478 | * |
| 479 | * Note also that we don't yet handle mmio resources here. More |
| 480 | * importantly our caller should be doing this so we need to |
| 481 | * restructure this as a helper function for drivers. |
| 482 | */ |
| 483 | |
| 484 | void ide_hwif_release_regions(ide_hwif_t *hwif) |
| 485 | { |
| 486 | u32 i = 0; |
| 487 | |
| 488 | if (hwif->mmio == 2) |
| 489 | return; |
| 490 | if (hwif->io_ports[IDE_CONTROL_OFFSET]) |
| 491 | release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); |
| 492 | if (hwif->straight8) { |
| 493 | release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); |
| 494 | return; |
| 495 | } |
| 496 | for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) |
| 497 | if (hwif->io_ports[i]) |
| 498 | release_region(hwif->io_ports[i], 1); |
| 499 | } |
| 500 | |
| 501 | /** |
| 502 | * ide_hwif_restore - restore hwif to template |
| 503 | * @hwif: hwif to update |
| 504 | * @tmp_hwif: template |
| 505 | * |
| 506 | * Restore hwif to a previous state by copying most settngs |
| 507 | * from the template. |
| 508 | */ |
| 509 | |
| 510 | static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) |
| 511 | { |
| 512 | hwif->hwgroup = tmp_hwif->hwgroup; |
| 513 | |
| 514 | hwif->gendev.parent = tmp_hwif->gendev.parent; |
| 515 | |
| 516 | hwif->proc = tmp_hwif->proc; |
| 517 | |
| 518 | hwif->major = tmp_hwif->major; |
| 519 | hwif->straight8 = tmp_hwif->straight8; |
| 520 | hwif->bus_state = tmp_hwif->bus_state; |
| 521 | |
| 522 | hwif->atapi_dma = tmp_hwif->atapi_dma; |
| 523 | hwif->ultra_mask = tmp_hwif->ultra_mask; |
| 524 | hwif->mwdma_mask = tmp_hwif->mwdma_mask; |
| 525 | hwif->swdma_mask = tmp_hwif->swdma_mask; |
| 526 | |
| 527 | hwif->chipset = tmp_hwif->chipset; |
| 528 | hwif->hold = tmp_hwif->hold; |
| 529 | |
| 530 | #ifdef CONFIG_BLK_DEV_IDEPCI |
| 531 | hwif->pci_dev = tmp_hwif->pci_dev; |
| 532 | hwif->cds = tmp_hwif->cds; |
| 533 | #endif |
| 534 | |
| 535 | hwif->tuneproc = tmp_hwif->tuneproc; |
| 536 | hwif->speedproc = tmp_hwif->speedproc; |
| 537 | hwif->selectproc = tmp_hwif->selectproc; |
| 538 | hwif->reset_poll = tmp_hwif->reset_poll; |
| 539 | hwif->pre_reset = tmp_hwif->pre_reset; |
| 540 | hwif->resetproc = tmp_hwif->resetproc; |
| 541 | hwif->intrproc = tmp_hwif->intrproc; |
| 542 | hwif->maskproc = tmp_hwif->maskproc; |
| 543 | hwif->quirkproc = tmp_hwif->quirkproc; |
| 544 | hwif->busproc = tmp_hwif->busproc; |
| 545 | |
| 546 | hwif->ata_input_data = tmp_hwif->ata_input_data; |
| 547 | hwif->ata_output_data = tmp_hwif->ata_output_data; |
| 548 | hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; |
| 549 | hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; |
| 550 | |
| 551 | hwif->dma_setup = tmp_hwif->dma_setup; |
| 552 | hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; |
| 553 | hwif->dma_start = tmp_hwif->dma_start; |
| 554 | hwif->ide_dma_end = tmp_hwif->ide_dma_end; |
| 555 | hwif->ide_dma_check = tmp_hwif->ide_dma_check; |
| 556 | hwif->ide_dma_on = tmp_hwif->ide_dma_on; |
| 557 | hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly; |
| 558 | hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; |
| 559 | hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on; |
| 560 | hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off; |
| 561 | hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq; |
| 562 | hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout; |
| 563 | |
| 564 | hwif->OUTB = tmp_hwif->OUTB; |
| 565 | hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; |
| 566 | hwif->OUTW = tmp_hwif->OUTW; |
| 567 | hwif->OUTL = tmp_hwif->OUTL; |
| 568 | hwif->OUTSW = tmp_hwif->OUTSW; |
| 569 | hwif->OUTSL = tmp_hwif->OUTSL; |
| 570 | |
| 571 | hwif->INB = tmp_hwif->INB; |
| 572 | hwif->INW = tmp_hwif->INW; |
| 573 | hwif->INL = tmp_hwif->INL; |
| 574 | hwif->INSW = tmp_hwif->INSW; |
| 575 | hwif->INSL = tmp_hwif->INSL; |
| 576 | |
| 577 | hwif->sg_max_nents = tmp_hwif->sg_max_nents; |
| 578 | |
| 579 | hwif->mmio = tmp_hwif->mmio; |
| 580 | hwif->rqsize = tmp_hwif->rqsize; |
| 581 | hwif->no_lba48 = tmp_hwif->no_lba48; |
| 582 | |
| 583 | #ifndef CONFIG_BLK_DEV_IDECS |
| 584 | hwif->irq = tmp_hwif->irq; |
| 585 | #endif |
| 586 | |
| 587 | hwif->dma_base = tmp_hwif->dma_base; |
| 588 | hwif->dma_master = tmp_hwif->dma_master; |
| 589 | hwif->dma_command = tmp_hwif->dma_command; |
| 590 | hwif->dma_vendor1 = tmp_hwif->dma_vendor1; |
| 591 | hwif->dma_status = tmp_hwif->dma_status; |
| 592 | hwif->dma_vendor3 = tmp_hwif->dma_vendor3; |
| 593 | hwif->dma_prdtable = tmp_hwif->dma_prdtable; |
| 594 | |
| 595 | hwif->dma_extra = tmp_hwif->dma_extra; |
| 596 | hwif->config_data = tmp_hwif->config_data; |
| 597 | hwif->select_data = tmp_hwif->select_data; |
| 598 | hwif->autodma = tmp_hwif->autodma; |
| 599 | hwif->udma_four = tmp_hwif->udma_four; |
| 600 | hwif->no_dsc = tmp_hwif->no_dsc; |
| 601 | |
| 602 | hwif->hwif_data = tmp_hwif->hwif_data; |
| 603 | } |
| 604 | |
| 605 | /** |
| 606 | * ide_unregister - free an ide interface |
| 607 | * @index: index of interface (will change soon to a pointer) |
| 608 | * |
| 609 | * Perform the final unregister of an IDE interface. At the moment |
| 610 | * we don't refcount interfaces so this will also get split up. |
| 611 | * |
| 612 | * Locking: |
| 613 | * The caller must not hold the IDE locks |
| 614 | * The drive present/vanishing is not yet properly locked |
| 615 | * Take care with the callbacks. These have been split to avoid |
| 616 | * deadlocking the IDE layer. The shutdown callback is called |
| 617 | * before we take the lock and free resources. It is up to the |
| 618 | * caller to be sure there is no pending I/O here, and that |
| 619 | * the interfce will not be reopened (present/vanishing locking |
| 620 | * isnt yet done btw). After we commit to the final kill we |
| 621 | * call the cleanup callback with the ide locks held. |
| 622 | * |
| 623 | * Unregister restores the hwif structures to the default state. |
| 624 | * This is raving bonkers. |
| 625 | */ |
| 626 | |
| 627 | void ide_unregister(unsigned int index) |
| 628 | { |
| 629 | ide_drive_t *drive; |
| 630 | ide_hwif_t *hwif, *g; |
| 631 | static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */ |
| 632 | ide_hwgroup_t *hwgroup; |
| 633 | int irq_count = 0, unit, i; |
| 634 | |
| 635 | BUG_ON(index >= MAX_HWIFS); |
| 636 | |
| 637 | BUG_ON(in_interrupt()); |
| 638 | BUG_ON(irqs_disabled()); |
| 639 | down(&ide_cfg_sem); |
| 640 | spin_lock_irq(&ide_lock); |
| 641 | hwif = &ide_hwifs[index]; |
| 642 | if (!hwif->present) |
| 643 | goto abort; |
| 644 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| 645 | drive = &hwif->drives[unit]; |
| 646 | if (!drive->present) |
| 647 | continue; |
| 648 | if (drive->usage || DRIVER(drive)->busy) |
| 649 | goto abort; |
| 650 | drive->dead = 1; |
| 651 | } |
| 652 | hwif->present = 0; |
| 653 | |
| 654 | spin_unlock_irq(&ide_lock); |
| 655 | |
| 656 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| 657 | drive = &hwif->drives[unit]; |
| 658 | if (!drive->present) |
| 659 | continue; |
| 660 | DRIVER(drive)->cleanup(drive); |
| 661 | } |
| 662 | |
| 663 | destroy_proc_ide_interface(hwif); |
| 664 | |
| 665 | hwgroup = hwif->hwgroup; |
| 666 | /* |
| 667 | * free the irq if we were the only hwif using it |
| 668 | */ |
| 669 | g = hwgroup->hwif; |
| 670 | do { |
| 671 | if (g->irq == hwif->irq) |
| 672 | ++irq_count; |
| 673 | g = g->next; |
| 674 | } while (g != hwgroup->hwif); |
| 675 | if (irq_count == 1) |
| 676 | free_irq(hwif->irq, hwgroup); |
| 677 | |
| 678 | spin_lock_irq(&ide_lock); |
| 679 | /* |
| 680 | * Note that we only release the standard ports, |
| 681 | * and do not even try to handle any extra ports |
| 682 | * allocated for weird IDE interface chipsets. |
| 683 | */ |
| 684 | ide_hwif_release_regions(hwif); |
| 685 | |
| 686 | /* |
| 687 | * Remove us from the hwgroup, and free |
| 688 | * the hwgroup if we were the only member |
| 689 | */ |
| 690 | for (i = 0; i < MAX_DRIVES; ++i) { |
| 691 | drive = &hwif->drives[i]; |
| 692 | if (drive->devfs_name[0] != '\0') { |
| 693 | devfs_remove(drive->devfs_name); |
| 694 | drive->devfs_name[0] = '\0'; |
| 695 | } |
| 696 | if (!drive->present) |
| 697 | continue; |
| 698 | if (drive == drive->next) { |
| 699 | /* special case: last drive from hwgroup. */ |
| 700 | BUG_ON(hwgroup->drive != drive); |
| 701 | hwgroup->drive = NULL; |
| 702 | } else { |
| 703 | ide_drive_t *walk; |
| 704 | |
| 705 | walk = hwgroup->drive; |
| 706 | while (walk->next != drive) |
| 707 | walk = walk->next; |
| 708 | walk->next = drive->next; |
| 709 | if (hwgroup->drive == drive) { |
| 710 | hwgroup->drive = drive->next; |
| 711 | hwgroup->hwif = HWIF(hwgroup->drive); |
| 712 | } |
| 713 | } |
| 714 | BUG_ON(hwgroup->drive == drive); |
| 715 | if (drive->id != NULL) { |
| 716 | kfree(drive->id); |
| 717 | drive->id = NULL; |
| 718 | } |
| 719 | drive->present = 0; |
| 720 | /* Messed up locking ... */ |
| 721 | spin_unlock_irq(&ide_lock); |
| 722 | blk_cleanup_queue(drive->queue); |
| 723 | device_unregister(&drive->gendev); |
| 724 | down(&drive->gendev_rel_sem); |
| 725 | spin_lock_irq(&ide_lock); |
| 726 | drive->queue = NULL; |
| 727 | } |
| 728 | if (hwif->next == hwif) { |
| 729 | BUG_ON(hwgroup->hwif != hwif); |
| 730 | kfree(hwgroup); |
| 731 | } else { |
| 732 | /* There is another interface in hwgroup. |
| 733 | * Unlink us, and set hwgroup->drive and ->hwif to |
| 734 | * something sane. |
| 735 | */ |
| 736 | g = hwgroup->hwif; |
| 737 | while (g->next != hwif) |
| 738 | g = g->next; |
| 739 | g->next = hwif->next; |
| 740 | if (hwgroup->hwif == hwif) { |
| 741 | /* Chose a random hwif for hwgroup->hwif. |
| 742 | * It's guaranteed that there are no drives |
| 743 | * left in the hwgroup. |
| 744 | */ |
| 745 | BUG_ON(hwgroup->drive != NULL); |
| 746 | hwgroup->hwif = g; |
| 747 | } |
| 748 | BUG_ON(hwgroup->hwif == hwif); |
| 749 | } |
| 750 | |
| 751 | /* More messed up locking ... */ |
| 752 | spin_unlock_irq(&ide_lock); |
| 753 | device_unregister(&hwif->gendev); |
| 754 | down(&hwif->gendev_rel_sem); |
| 755 | |
| 756 | /* |
| 757 | * Remove us from the kernel's knowledge |
| 758 | */ |
| 759 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); |
| 760 | kfree(hwif->sg_table); |
| 761 | unregister_blkdev(hwif->major, hwif->name); |
| 762 | spin_lock_irq(&ide_lock); |
| 763 | |
| 764 | if (hwif->dma_base) { |
| 765 | (void) ide_release_dma(hwif); |
| 766 | |
| 767 | hwif->dma_base = 0; |
| 768 | hwif->dma_master = 0; |
| 769 | hwif->dma_command = 0; |
| 770 | hwif->dma_vendor1 = 0; |
| 771 | hwif->dma_status = 0; |
| 772 | hwif->dma_vendor3 = 0; |
| 773 | hwif->dma_prdtable = 0; |
| 774 | } |
| 775 | |
| 776 | /* copy original settings */ |
| 777 | tmp_hwif = *hwif; |
| 778 | |
| 779 | /* restore hwif data to pristine status */ |
| 780 | init_hwif_data(hwif, index); |
| 781 | init_hwif_default(hwif, index); |
| 782 | |
| 783 | ide_hwif_restore(hwif, &tmp_hwif); |
| 784 | |
| 785 | abort: |
| 786 | spin_unlock_irq(&ide_lock); |
| 787 | up(&ide_cfg_sem); |
| 788 | } |
| 789 | |
| 790 | EXPORT_SYMBOL(ide_unregister); |
| 791 | |
| 792 | |
| 793 | /** |
| 794 | * ide_setup_ports - set up IDE interface ports |
| 795 | * @hw: register descriptions |
| 796 | * @base: base register |
| 797 | * @offsets: table of register offsets |
| 798 | * @ctrl: control register |
| 799 | * @ack_irq: IRQ ack |
| 800 | * @irq: interrupt lie |
| 801 | * |
| 802 | * Setup hw_regs_t structure described by parameters. You |
| 803 | * may set up the hw structure yourself OR use this routine to |
| 804 | * do it for you. This is basically a helper |
| 805 | * |
| 806 | */ |
| 807 | |
| 808 | void ide_setup_ports ( hw_regs_t *hw, |
| 809 | unsigned long base, int *offsets, |
| 810 | unsigned long ctrl, unsigned long intr, |
| 811 | ide_ack_intr_t *ack_intr, |
| 812 | /* |
| 813 | * ide_io_ops_t *iops, |
| 814 | */ |
| 815 | int irq) |
| 816 | { |
| 817 | int i; |
| 818 | |
| 819 | for (i = 0; i < IDE_NR_PORTS; i++) { |
| 820 | if (offsets[i] == -1) { |
| 821 | switch(i) { |
| 822 | case IDE_CONTROL_OFFSET: |
| 823 | hw->io_ports[i] = ctrl; |
| 824 | break; |
| 825 | #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) |
| 826 | case IDE_IRQ_OFFSET: |
| 827 | hw->io_ports[i] = intr; |
| 828 | break; |
| 829 | #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ |
| 830 | default: |
| 831 | hw->io_ports[i] = 0; |
| 832 | break; |
| 833 | } |
| 834 | } else { |
| 835 | hw->io_ports[i] = base + offsets[i]; |
| 836 | } |
| 837 | } |
| 838 | hw->irq = irq; |
| 839 | hw->dma = NO_DMA; |
| 840 | hw->ack_intr = ack_intr; |
| 841 | /* |
| 842 | * hw->iops = iops; |
| 843 | */ |
| 844 | } |
| 845 | |
| 846 | /** |
| 847 | * ide_register_hw_with_fixup - register IDE interface |
| 848 | * @hw: hardware registers |
| 849 | * @hwifp: pointer to returned hwif |
| 850 | * @fixup: fixup function |
| 851 | * |
| 852 | * Register an IDE interface, specifying exactly the registers etc. |
| 853 | * Set init=1 iff calling before probes have taken place. |
| 854 | * |
| 855 | * Returns -1 on error. |
| 856 | */ |
| 857 | |
| 858 | int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif)) |
| 859 | { |
| 860 | int index, retry = 1; |
| 861 | ide_hwif_t *hwif; |
| 862 | |
| 863 | do { |
| 864 | for (index = 0; index < MAX_HWIFS; ++index) { |
| 865 | hwif = &ide_hwifs[index]; |
| 866 | if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET]) |
| 867 | goto found; |
| 868 | } |
| 869 | for (index = 0; index < MAX_HWIFS; ++index) { |
| 870 | hwif = &ide_hwifs[index]; |
| 871 | if (hwif->hold) |
| 872 | continue; |
| 873 | if ((!hwif->present && !hwif->mate && !initializing) || |
| 874 | (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing)) |
| 875 | goto found; |
| 876 | } |
| 877 | for (index = 0; index < MAX_HWIFS; index++) |
| 878 | ide_unregister(index); |
| 879 | } while (retry--); |
| 880 | return -1; |
| 881 | found: |
| 882 | if (hwif->present) |
| 883 | ide_unregister(index); |
| 884 | else if (!hwif->hold) { |
| 885 | init_hwif_data(hwif, index); |
| 886 | init_hwif_default(hwif, index); |
| 887 | } |
| 888 | if (hwif->present) |
| 889 | return -1; |
| 890 | memcpy(&hwif->hw, hw, sizeof(*hw)); |
| 891 | memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports)); |
| 892 | hwif->irq = hw->irq; |
| 893 | hwif->noprobe = 0; |
| 894 | hwif->chipset = hw->chipset; |
| 895 | |
| 896 | if (!initializing) { |
| 897 | probe_hwif_init_with_fixup(hwif, fixup); |
| 898 | create_proc_ide_interfaces(); |
| 899 | } |
| 900 | |
| 901 | if (hwifp) |
| 902 | *hwifp = hwif; |
| 903 | |
| 904 | return (initializing || hwif->present) ? index : -1; |
| 905 | } |
| 906 | |
| 907 | EXPORT_SYMBOL(ide_register_hw_with_fixup); |
| 908 | |
| 909 | int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp) |
| 910 | { |
| 911 | return ide_register_hw_with_fixup(hw, hwifp, NULL); |
| 912 | } |
| 913 | |
| 914 | EXPORT_SYMBOL(ide_register_hw); |
| 915 | |
| 916 | /* |
| 917 | * Locks for IDE setting functionality |
| 918 | */ |
| 919 | |
| 920 | DECLARE_MUTEX(ide_setting_sem); |
| 921 | |
| 922 | /** |
| 923 | * __ide_add_setting - add an ide setting option |
| 924 | * @drive: drive to use |
| 925 | * @name: setting name |
| 926 | * @rw: true if the function is read write |
| 927 | * @read_ioctl: function to call on read |
| 928 | * @write_ioctl: function to call on write |
| 929 | * @data_type: type of data |
| 930 | * @min: range minimum |
| 931 | * @max: range maximum |
| 932 | * @mul_factor: multiplication scale |
| 933 | * @div_factor: divison scale |
| 934 | * @data: private data field |
| 935 | * @set: setting |
| 936 | * @auto_remove: setting auto removal flag |
| 937 | * |
| 938 | * Removes the setting named from the device if it is present. |
| 939 | * The function takes the settings_lock to protect against |
| 940 | * parallel changes. This function must not be called from IRQ |
| 941 | * context. Returns 0 on success or -1 on failure. |
| 942 | * |
| 943 | * BUGS: This code is seriously over-engineered. There is also |
| 944 | * magic about how the driver specific features are setup. If |
| 945 | * a driver is attached we assume the driver settings are auto |
| 946 | * remove. |
| 947 | */ |
| 948 | |
| 949 | static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove) |
| 950 | { |
| 951 | ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL; |
| 952 | |
| 953 | down(&ide_setting_sem); |
| 954 | while ((*p) && strcmp((*p)->name, name) < 0) |
| 955 | p = &((*p)->next); |
| 956 | if ((setting = kmalloc(sizeof(*setting), GFP_KERNEL)) == NULL) |
| 957 | goto abort; |
| 958 | memset(setting, 0, sizeof(*setting)); |
| 959 | if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL) |
| 960 | goto abort; |
| 961 | strcpy(setting->name, name); |
| 962 | setting->rw = rw; |
| 963 | setting->read_ioctl = read_ioctl; |
| 964 | setting->write_ioctl = write_ioctl; |
| 965 | setting->data_type = data_type; |
| 966 | setting->min = min; |
| 967 | setting->max = max; |
| 968 | setting->mul_factor = mul_factor; |
| 969 | setting->div_factor = div_factor; |
| 970 | setting->data = data; |
| 971 | setting->set = set; |
| 972 | |
| 973 | setting->next = *p; |
| 974 | if (auto_remove) |
| 975 | setting->auto_remove = 1; |
| 976 | *p = setting; |
| 977 | up(&ide_setting_sem); |
| 978 | return 0; |
| 979 | abort: |
| 980 | up(&ide_setting_sem); |
| 981 | if (setting) |
| 982 | kfree(setting); |
| 983 | return -1; |
| 984 | } |
| 985 | |
| 986 | int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set) |
| 987 | { |
| 988 | return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1); |
| 989 | } |
| 990 | |
| 991 | EXPORT_SYMBOL(ide_add_setting); |
| 992 | |
| 993 | /** |
| 994 | * __ide_remove_setting - remove an ide setting option |
| 995 | * @drive: drive to use |
| 996 | * @name: setting name |
| 997 | * |
| 998 | * Removes the setting named from the device if it is present. |
| 999 | * The caller must hold the setting semaphore. |
| 1000 | */ |
| 1001 | |
| 1002 | static void __ide_remove_setting (ide_drive_t *drive, char *name) |
| 1003 | { |
| 1004 | ide_settings_t **p, *setting; |
| 1005 | |
| 1006 | p = (ide_settings_t **) &drive->settings; |
| 1007 | |
| 1008 | while ((*p) && strcmp((*p)->name, name)) |
| 1009 | p = &((*p)->next); |
| 1010 | if ((setting = (*p)) == NULL) |
| 1011 | return; |
| 1012 | |
| 1013 | (*p) = setting->next; |
| 1014 | |
| 1015 | kfree(setting->name); |
| 1016 | kfree(setting); |
| 1017 | } |
| 1018 | |
| 1019 | /** |
| 1020 | * ide_find_setting_by_ioctl - find a drive specific ioctl |
| 1021 | * @drive: drive to scan |
| 1022 | * @cmd: ioctl command to handle |
| 1023 | * |
| 1024 | * Scan's the device setting table for a matching entry and returns |
| 1025 | * this or NULL if no entry is found. The caller must hold the |
| 1026 | * setting semaphore |
| 1027 | */ |
| 1028 | |
| 1029 | static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd) |
| 1030 | { |
| 1031 | ide_settings_t *setting = drive->settings; |
| 1032 | |
| 1033 | while (setting) { |
| 1034 | if (setting->read_ioctl == cmd || setting->write_ioctl == cmd) |
| 1035 | break; |
| 1036 | setting = setting->next; |
| 1037 | } |
| 1038 | |
| 1039 | return setting; |
| 1040 | } |
| 1041 | |
| 1042 | /** |
| 1043 | * ide_find_setting_by_name - find a drive specific setting |
| 1044 | * @drive: drive to scan |
| 1045 | * @name: setting name |
| 1046 | * |
| 1047 | * Scan's the device setting table for a matching entry and returns |
| 1048 | * this or NULL if no entry is found. The caller must hold the |
| 1049 | * setting semaphore |
| 1050 | */ |
| 1051 | |
| 1052 | ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name) |
| 1053 | { |
| 1054 | ide_settings_t *setting = drive->settings; |
| 1055 | |
| 1056 | while (setting) { |
| 1057 | if (strcmp(setting->name, name) == 0) |
| 1058 | break; |
| 1059 | setting = setting->next; |
| 1060 | } |
| 1061 | return setting; |
| 1062 | } |
| 1063 | |
| 1064 | /** |
| 1065 | * auto_remove_settings - remove driver specific settings |
| 1066 | * @drive: drive |
| 1067 | * |
| 1068 | * Automatically remove all the driver specific settings for this |
| 1069 | * drive. This function may sleep and must not be called from IRQ |
| 1070 | * context. The caller must hold ide_setting_sem. |
| 1071 | */ |
| 1072 | |
| 1073 | static void auto_remove_settings (ide_drive_t *drive) |
| 1074 | { |
| 1075 | ide_settings_t *setting; |
| 1076 | repeat: |
| 1077 | setting = drive->settings; |
| 1078 | while (setting) { |
| 1079 | if (setting->auto_remove) { |
| 1080 | __ide_remove_setting(drive, setting->name); |
| 1081 | goto repeat; |
| 1082 | } |
| 1083 | setting = setting->next; |
| 1084 | } |
| 1085 | } |
| 1086 | |
| 1087 | /** |
| 1088 | * ide_read_setting - read an IDE setting |
| 1089 | * @drive: drive to read from |
| 1090 | * @setting: drive setting |
| 1091 | * |
| 1092 | * Read a drive setting and return the value. The caller |
| 1093 | * must hold the ide_setting_sem when making this call. |
| 1094 | * |
| 1095 | * BUGS: the data return and error are the same return value |
| 1096 | * so an error -EINVAL and true return of the same value cannot |
| 1097 | * be told apart |
| 1098 | */ |
| 1099 | |
| 1100 | int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting) |
| 1101 | { |
| 1102 | int val = -EINVAL; |
| 1103 | unsigned long flags; |
| 1104 | |
| 1105 | if ((setting->rw & SETTING_READ)) { |
| 1106 | spin_lock_irqsave(&ide_lock, flags); |
| 1107 | switch(setting->data_type) { |
| 1108 | case TYPE_BYTE: |
| 1109 | val = *((u8 *) setting->data); |
| 1110 | break; |
| 1111 | case TYPE_SHORT: |
| 1112 | val = *((u16 *) setting->data); |
| 1113 | break; |
| 1114 | case TYPE_INT: |
| 1115 | case TYPE_INTA: |
| 1116 | val = *((u32 *) setting->data); |
| 1117 | break; |
| 1118 | } |
| 1119 | spin_unlock_irqrestore(&ide_lock, flags); |
| 1120 | } |
| 1121 | return val; |
| 1122 | } |
| 1123 | |
| 1124 | /** |
| 1125 | * ide_spin_wait_hwgroup - wait for group |
| 1126 | * @drive: drive in the group |
| 1127 | * |
| 1128 | * Wait for an IDE device group to go non busy and then return |
| 1129 | * holding the ide_lock which guards the hwgroup->busy status |
| 1130 | * and right to use it. |
| 1131 | */ |
| 1132 | |
| 1133 | int ide_spin_wait_hwgroup (ide_drive_t *drive) |
| 1134 | { |
| 1135 | ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| 1136 | unsigned long timeout = jiffies + (3 * HZ); |
| 1137 | |
| 1138 | spin_lock_irq(&ide_lock); |
| 1139 | |
| 1140 | while (hwgroup->busy) { |
| 1141 | unsigned long lflags; |
| 1142 | spin_unlock_irq(&ide_lock); |
| 1143 | local_irq_set(lflags); |
| 1144 | if (time_after(jiffies, timeout)) { |
| 1145 | local_irq_restore(lflags); |
| 1146 | printk(KERN_ERR "%s: channel busy\n", drive->name); |
| 1147 | return -EBUSY; |
| 1148 | } |
| 1149 | local_irq_restore(lflags); |
| 1150 | spin_lock_irq(&ide_lock); |
| 1151 | } |
| 1152 | return 0; |
| 1153 | } |
| 1154 | |
| 1155 | EXPORT_SYMBOL(ide_spin_wait_hwgroup); |
| 1156 | |
| 1157 | /** |
| 1158 | * ide_write_setting - read an IDE setting |
| 1159 | * @drive: drive to read from |
| 1160 | * @setting: drive setting |
| 1161 | * @val: value |
| 1162 | * |
| 1163 | * Write a drive setting if it is possible. The caller |
| 1164 | * must hold the ide_setting_sem when making this call. |
| 1165 | * |
| 1166 | * BUGS: the data return and error are the same return value |
| 1167 | * so an error -EINVAL and true return of the same value cannot |
| 1168 | * be told apart |
| 1169 | * |
| 1170 | * FIXME: This should be changed to enqueue a special request |
| 1171 | * to the driver to change settings, and then wait on a sema for completion. |
| 1172 | * The current scheme of polling is kludgy, though safe enough. |
| 1173 | */ |
| 1174 | |
| 1175 | int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val) |
| 1176 | { |
| 1177 | int i; |
| 1178 | u32 *p; |
| 1179 | |
| 1180 | if (!capable(CAP_SYS_ADMIN)) |
| 1181 | return -EACCES; |
| 1182 | if (!(setting->rw & SETTING_WRITE)) |
| 1183 | return -EPERM; |
| 1184 | if (val < setting->min || val > setting->max) |
| 1185 | return -EINVAL; |
| 1186 | if (setting->set) |
| 1187 | return setting->set(drive, val); |
| 1188 | if (ide_spin_wait_hwgroup(drive)) |
| 1189 | return -EBUSY; |
| 1190 | switch (setting->data_type) { |
| 1191 | case TYPE_BYTE: |
| 1192 | *((u8 *) setting->data) = val; |
| 1193 | break; |
| 1194 | case TYPE_SHORT: |
| 1195 | *((u16 *) setting->data) = val; |
| 1196 | break; |
| 1197 | case TYPE_INT: |
| 1198 | *((u32 *) setting->data) = val; |
| 1199 | break; |
| 1200 | case TYPE_INTA: |
| 1201 | p = (u32 *) setting->data; |
| 1202 | for (i = 0; i < 1 << PARTN_BITS; i++, p++) |
| 1203 | *p = val; |
| 1204 | break; |
| 1205 | } |
| 1206 | spin_unlock_irq(&ide_lock); |
| 1207 | return 0; |
| 1208 | } |
| 1209 | |
| 1210 | static int set_io_32bit(ide_drive_t *drive, int arg) |
| 1211 | { |
| 1212 | drive->io_32bit = arg; |
| 1213 | #ifdef CONFIG_BLK_DEV_DTC2278 |
| 1214 | if (HWIF(drive)->chipset == ide_dtc2278) |
| 1215 | HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg; |
| 1216 | #endif /* CONFIG_BLK_DEV_DTC2278 */ |
| 1217 | return 0; |
| 1218 | } |
| 1219 | |
| 1220 | static int set_using_dma (ide_drive_t *drive, int arg) |
| 1221 | { |
| 1222 | #ifdef CONFIG_BLK_DEV_IDEDMA |
| 1223 | if (!drive->id || !(drive->id->capability & 1)) |
| 1224 | return -EPERM; |
| 1225 | if (HWIF(drive)->ide_dma_check == NULL) |
| 1226 | return -EPERM; |
| 1227 | if (arg) { |
| 1228 | if (HWIF(drive)->ide_dma_check(drive)) return -EIO; |
| 1229 | if (HWIF(drive)->ide_dma_on(drive)) return -EIO; |
| 1230 | } else { |
| 1231 | if (__ide_dma_off(drive)) |
| 1232 | return -EIO; |
| 1233 | } |
| 1234 | return 0; |
| 1235 | #else |
| 1236 | return -EPERM; |
| 1237 | #endif |
| 1238 | } |
| 1239 | |
| 1240 | static int set_pio_mode (ide_drive_t *drive, int arg) |
| 1241 | { |
| 1242 | struct request rq; |
| 1243 | |
| 1244 | if (!HWIF(drive)->tuneproc) |
| 1245 | return -ENOSYS; |
| 1246 | if (drive->special.b.set_tune) |
| 1247 | return -EBUSY; |
| 1248 | ide_init_drive_cmd(&rq); |
| 1249 | drive->tune_req = (u8) arg; |
| 1250 | drive->special.b.set_tune = 1; |
| 1251 | (void) ide_do_drive_cmd(drive, &rq, ide_wait); |
| 1252 | return 0; |
| 1253 | } |
| 1254 | |
| 1255 | static int set_xfer_rate (ide_drive_t *drive, int arg) |
| 1256 | { |
| 1257 | int err = ide_wait_cmd(drive, |
| 1258 | WIN_SETFEATURES, (u8) arg, |
| 1259 | SETFEATURES_XFER, 0, NULL); |
| 1260 | |
| 1261 | if (!err && arg) { |
| 1262 | ide_set_xfer_rate(drive, (u8) arg); |
| 1263 | ide_driveid_update(drive); |
| 1264 | } |
| 1265 | return err; |
| 1266 | } |
| 1267 | |
| 1268 | /** |
| 1269 | * ide_add_generic_settings - generic ide settings |
| 1270 | * @drive: drive being configured |
| 1271 | * |
| 1272 | * Add the generic parts of the system settings to the /proc files and |
| 1273 | * ioctls for this IDE device. The caller must not be holding the |
| 1274 | * ide_setting_sem. |
| 1275 | */ |
| 1276 | |
| 1277 | void ide_add_generic_settings (ide_drive_t *drive) |
| 1278 | { |
| 1279 | /* |
| 1280 | * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function |
| 1281 | */ |
| 1282 | __ide_add_setting(drive, "io_32bit", drive->no_io_32bit ? SETTING_READ : SETTING_RW, HDIO_GET_32BIT, HDIO_SET_32BIT, TYPE_BYTE, 0, 1 + (SUPPORT_VLB_SYNC << 1), 1, 1, &drive->io_32bit, set_io_32bit, 0); |
| 1283 | __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0); |
| 1284 | __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0); |
| 1285 | __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0); |
| 1286 | __ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL, 0); |
| 1287 | __ide_add_setting(drive, "using_dma", SETTING_RW, HDIO_GET_DMA, HDIO_SET_DMA, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma, 0); |
| 1288 | __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0); |
| 1289 | __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0); |
| 1290 | __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0); |
| 1291 | } |
| 1292 | |
| 1293 | /** |
| 1294 | * system_bus_clock - clock guess |
| 1295 | * |
| 1296 | * External version of the bus clock guess used by very old IDE drivers |
| 1297 | * for things like VLB timings. Should not be used. |
| 1298 | */ |
| 1299 | |
| 1300 | int system_bus_clock (void) |
| 1301 | { |
| 1302 | return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed )); |
| 1303 | } |
| 1304 | |
| 1305 | EXPORT_SYMBOL(system_bus_clock); |
| 1306 | |
| 1307 | /* |
| 1308 | * Locking is badly broken here - since way back. That sucker is |
| 1309 | * root-only, but that's not an excuse... The real question is what |
| 1310 | * exclusion rules do we want here. |
| 1311 | */ |
| 1312 | int ide_replace_subdriver (ide_drive_t *drive, const char *driver) |
| 1313 | { |
| 1314 | if (!drive->present || drive->usage || drive->dead) |
| 1315 | goto abort; |
| 1316 | if (DRIVER(drive)->cleanup(drive)) |
| 1317 | goto abort; |
| 1318 | strlcpy(drive->driver_req, driver, sizeof(drive->driver_req)); |
| 1319 | if (ata_attach(drive)) { |
| 1320 | spin_lock(&drives_lock); |
| 1321 | list_del_init(&drive->list); |
| 1322 | spin_unlock(&drives_lock); |
| 1323 | drive->driver_req[0] = 0; |
| 1324 | ata_attach(drive); |
| 1325 | } else { |
| 1326 | drive->driver_req[0] = 0; |
| 1327 | } |
| 1328 | if (drive->driver && !strcmp(drive->driver->name, driver)) |
| 1329 | return 0; |
| 1330 | abort: |
| 1331 | return 1; |
| 1332 | } |
| 1333 | |
| 1334 | /** |
| 1335 | * ata_attach - attach an ATA/ATAPI device |
| 1336 | * @drive: drive to attach |
| 1337 | * |
| 1338 | * Takes a drive that is as yet not assigned to any midlayer IDE |
| 1339 | * driver (or is assigned to the default driver) and figures out |
| 1340 | * which driver would like to own it. If nobody claims the drive |
| 1341 | * then it is automatically attached to the default driver used for |
| 1342 | * unclaimed objects. |
| 1343 | * |
| 1344 | * A return of zero indicates attachment to a driver, of one |
| 1345 | * attachment to the default driver. |
| 1346 | * |
| 1347 | * Takes drivers_lock. |
| 1348 | */ |
| 1349 | |
| 1350 | int ata_attach(ide_drive_t *drive) |
| 1351 | { |
| 1352 | struct list_head *p; |
| 1353 | spin_lock(&drivers_lock); |
| 1354 | list_for_each(p, &drivers) { |
| 1355 | ide_driver_t *driver = list_entry(p, ide_driver_t, drivers); |
| 1356 | if (!try_module_get(driver->owner)) |
| 1357 | continue; |
| 1358 | spin_unlock(&drivers_lock); |
| 1359 | if (driver->attach(drive) == 0) { |
| 1360 | module_put(driver->owner); |
| 1361 | drive->gendev.driver = &driver->gen_driver; |
| 1362 | return 0; |
| 1363 | } |
| 1364 | spin_lock(&drivers_lock); |
| 1365 | module_put(driver->owner); |
| 1366 | } |
| 1367 | drive->gendev.driver = NULL; |
| 1368 | spin_unlock(&drivers_lock); |
| 1369 | if (ide_register_subdriver(drive, NULL)) |
| 1370 | panic("ide: default attach failed"); |
| 1371 | return 1; |
| 1372 | } |
| 1373 | |
| 1374 | static int generic_ide_suspend(struct device *dev, pm_message_t state) |
| 1375 | { |
| 1376 | ide_drive_t *drive = dev->driver_data; |
| 1377 | struct request rq; |
| 1378 | struct request_pm_state rqpm; |
| 1379 | ide_task_t args; |
| 1380 | |
| 1381 | memset(&rq, 0, sizeof(rq)); |
| 1382 | memset(&rqpm, 0, sizeof(rqpm)); |
| 1383 | memset(&args, 0, sizeof(args)); |
| 1384 | rq.flags = REQ_PM_SUSPEND; |
| 1385 | rq.special = &args; |
| 1386 | rq.pm = &rqpm; |
| 1387 | rqpm.pm_step = ide_pm_state_start_suspend; |
| 1388 | rqpm.pm_state = state; |
| 1389 | |
| 1390 | return ide_do_drive_cmd(drive, &rq, ide_wait); |
| 1391 | } |
| 1392 | |
| 1393 | static int generic_ide_resume(struct device *dev) |
| 1394 | { |
| 1395 | ide_drive_t *drive = dev->driver_data; |
| 1396 | struct request rq; |
| 1397 | struct request_pm_state rqpm; |
| 1398 | ide_task_t args; |
| 1399 | |
| 1400 | memset(&rq, 0, sizeof(rq)); |
| 1401 | memset(&rqpm, 0, sizeof(rqpm)); |
| 1402 | memset(&args, 0, sizeof(args)); |
| 1403 | rq.flags = REQ_PM_RESUME; |
| 1404 | rq.special = &args; |
| 1405 | rq.pm = &rqpm; |
| 1406 | rqpm.pm_step = ide_pm_state_start_resume; |
| 1407 | rqpm.pm_state = 0; |
| 1408 | |
| 1409 | return ide_do_drive_cmd(drive, &rq, ide_head_wait); |
| 1410 | } |
| 1411 | |
| 1412 | int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, |
| 1413 | unsigned int cmd, unsigned long arg) |
| 1414 | { |
| 1415 | ide_settings_t *setting; |
| 1416 | ide_driver_t *drv; |
| 1417 | int err = 0; |
| 1418 | void __user *p = (void __user *)arg; |
| 1419 | |
| 1420 | down(&ide_setting_sem); |
| 1421 | if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) { |
| 1422 | if (cmd == setting->read_ioctl) { |
| 1423 | err = ide_read_setting(drive, setting); |
| 1424 | up(&ide_setting_sem); |
| 1425 | return err >= 0 ? put_user(err, (long __user *)arg) : err; |
| 1426 | } else { |
| 1427 | if (bdev != bdev->bd_contains) |
| 1428 | err = -EINVAL; |
| 1429 | else |
| 1430 | err = ide_write_setting(drive, setting, arg); |
| 1431 | up(&ide_setting_sem); |
| 1432 | return err; |
| 1433 | } |
| 1434 | } |
| 1435 | up(&ide_setting_sem); |
| 1436 | |
| 1437 | switch (cmd) { |
| 1438 | case HDIO_GETGEO: |
| 1439 | { |
| 1440 | struct hd_geometry geom; |
| 1441 | if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL; |
| 1442 | geom.heads = drive->bios_head; |
| 1443 | geom.sectors = drive->bios_sect; |
| 1444 | geom.cylinders = (u16)drive->bios_cyl; /* truncate */ |
| 1445 | geom.start = get_start_sect(bdev); |
| 1446 | if (copy_to_user(p, &geom, sizeof(struct hd_geometry))) |
| 1447 | return -EFAULT; |
| 1448 | return 0; |
| 1449 | } |
| 1450 | |
| 1451 | case HDIO_OBSOLETE_IDENTITY: |
| 1452 | case HDIO_GET_IDENTITY: |
| 1453 | if (bdev != bdev->bd_contains) |
| 1454 | return -EINVAL; |
| 1455 | if (drive->id_read == 0) |
| 1456 | return -ENOMSG; |
| 1457 | if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) |
| 1458 | return -EFAULT; |
| 1459 | return 0; |
| 1460 | |
| 1461 | case HDIO_GET_NICE: |
| 1462 | return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | |
| 1463 | drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | |
| 1464 | drive->nice0 << IDE_NICE_0 | |
| 1465 | drive->nice1 << IDE_NICE_1 | |
| 1466 | drive->nice2 << IDE_NICE_2, |
| 1467 | (long __user *) arg); |
| 1468 | |
| 1469 | #ifdef CONFIG_IDE_TASK_IOCTL |
| 1470 | case HDIO_DRIVE_TASKFILE: |
| 1471 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) |
| 1472 | return -EACCES; |
| 1473 | switch(drive->media) { |
| 1474 | case ide_disk: |
| 1475 | return ide_taskfile_ioctl(drive, cmd, arg); |
| 1476 | default: |
| 1477 | return -ENOMSG; |
| 1478 | } |
| 1479 | #endif /* CONFIG_IDE_TASK_IOCTL */ |
| 1480 | |
| 1481 | case HDIO_DRIVE_CMD: |
| 1482 | if (!capable(CAP_SYS_RAWIO)) |
| 1483 | return -EACCES; |
| 1484 | return ide_cmd_ioctl(drive, cmd, arg); |
| 1485 | |
| 1486 | case HDIO_DRIVE_TASK: |
| 1487 | if (!capable(CAP_SYS_RAWIO)) |
| 1488 | return -EACCES; |
| 1489 | return ide_task_ioctl(drive, cmd, arg); |
| 1490 | |
| 1491 | case HDIO_SCAN_HWIF: |
| 1492 | { |
| 1493 | hw_regs_t hw; |
| 1494 | int args[3]; |
| 1495 | if (!capable(CAP_SYS_RAWIO)) return -EACCES; |
| 1496 | if (copy_from_user(args, p, 3 * sizeof(int))) |
| 1497 | return -EFAULT; |
| 1498 | memset(&hw, 0, sizeof(hw)); |
| 1499 | ide_init_hwif_ports(&hw, (unsigned long) args[0], |
| 1500 | (unsigned long) args[1], NULL); |
| 1501 | hw.irq = args[2]; |
| 1502 | if (ide_register_hw(&hw, NULL) == -1) |
| 1503 | return -EIO; |
| 1504 | return 0; |
| 1505 | } |
| 1506 | case HDIO_UNREGISTER_HWIF: |
| 1507 | if (!capable(CAP_SYS_RAWIO)) return -EACCES; |
| 1508 | /* (arg > MAX_HWIFS) checked in function */ |
| 1509 | ide_unregister(arg); |
| 1510 | return 0; |
| 1511 | case HDIO_SET_NICE: |
| 1512 | if (!capable(CAP_SYS_ADMIN)) return -EACCES; |
| 1513 | if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) |
| 1514 | return -EPERM; |
| 1515 | drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; |
| 1516 | drv = *(ide_driver_t **)bdev->bd_disk->private_data; |
| 1517 | if (drive->dsc_overlap && !drv->supports_dsc_overlap) { |
| 1518 | drive->dsc_overlap = 0; |
| 1519 | return -EPERM; |
| 1520 | } |
| 1521 | drive->nice1 = (arg >> IDE_NICE_1) & 1; |
| 1522 | return 0; |
| 1523 | case HDIO_DRIVE_RESET: |
| 1524 | { |
| 1525 | unsigned long flags; |
| 1526 | if (!capable(CAP_SYS_ADMIN)) return -EACCES; |
| 1527 | |
| 1528 | /* |
| 1529 | * Abort the current command on the |
| 1530 | * group if there is one, taking |
| 1531 | * care not to allow anything else |
| 1532 | * to be queued and to die on the |
| 1533 | * spot if we miss one somehow |
| 1534 | */ |
| 1535 | |
| 1536 | spin_lock_irqsave(&ide_lock, flags); |
| 1537 | |
| 1538 | ide_abort(drive, "drive reset"); |
| 1539 | |
| 1540 | if(HWGROUP(drive)->handler) |
| 1541 | BUG(); |
| 1542 | |
| 1543 | /* Ensure nothing gets queued after we |
| 1544 | drop the lock. Reset will clear the busy */ |
| 1545 | |
| 1546 | HWGROUP(drive)->busy = 1; |
| 1547 | spin_unlock_irqrestore(&ide_lock, flags); |
| 1548 | (void) ide_do_reset(drive); |
| 1549 | |
| 1550 | return 0; |
| 1551 | } |
| 1552 | |
| 1553 | case CDROMEJECT: |
| 1554 | case CDROMCLOSETRAY: |
| 1555 | return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p); |
| 1556 | |
| 1557 | case HDIO_GET_BUSSTATE: |
| 1558 | if (!capable(CAP_SYS_ADMIN)) |
| 1559 | return -EACCES; |
| 1560 | if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) |
| 1561 | return -EFAULT; |
| 1562 | return 0; |
| 1563 | |
| 1564 | case HDIO_SET_BUSSTATE: |
| 1565 | if (!capable(CAP_SYS_ADMIN)) |
| 1566 | return -EACCES; |
| 1567 | if (HWIF(drive)->busproc) |
| 1568 | return HWIF(drive)->busproc(drive, (int)arg); |
| 1569 | return -EOPNOTSUPP; |
| 1570 | default: |
| 1571 | return -EINVAL; |
| 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | EXPORT_SYMBOL(generic_ide_ioctl); |
| 1576 | |
| 1577 | /* |
| 1578 | * stridx() returns the offset of c within s, |
| 1579 | * or -1 if c is '\0' or not found within s. |
| 1580 | */ |
| 1581 | static int __init stridx (const char *s, char c) |
| 1582 | { |
| 1583 | char *i = strchr(s, c); |
| 1584 | return (i && c) ? i - s : -1; |
| 1585 | } |
| 1586 | |
| 1587 | /* |
| 1588 | * match_parm() does parsing for ide_setup(): |
| 1589 | * |
| 1590 | * 1. the first char of s must be '='. |
| 1591 | * 2. if the remainder matches one of the supplied keywords, |
| 1592 | * the index (1 based) of the keyword is negated and returned. |
| 1593 | * 3. if the remainder is a series of no more than max_vals numbers |
| 1594 | * separated by commas, the numbers are saved in vals[] and a |
| 1595 | * count of how many were saved is returned. Base10 is assumed, |
| 1596 | * and base16 is allowed when prefixed with "0x". |
| 1597 | * 4. otherwise, zero is returned. |
| 1598 | */ |
| 1599 | static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) |
| 1600 | { |
| 1601 | static const char *decimal = "0123456789"; |
| 1602 | static const char *hex = "0123456789abcdef"; |
| 1603 | int i, n; |
| 1604 | |
| 1605 | if (*s++ == '=') { |
| 1606 | /* |
| 1607 | * Try matching against the supplied keywords, |
| 1608 | * and return -(index+1) if we match one |
| 1609 | */ |
| 1610 | if (keywords != NULL) { |
| 1611 | for (i = 0; *keywords != NULL; ++i) { |
| 1612 | if (!strcmp(s, *keywords++)) |
| 1613 | return -(i+1); |
| 1614 | } |
| 1615 | } |
| 1616 | /* |
| 1617 | * Look for a series of no more than "max_vals" |
| 1618 | * numeric values separated by commas, in base10, |
| 1619 | * or base16 when prefixed with "0x". |
| 1620 | * Return a count of how many were found. |
| 1621 | */ |
| 1622 | for (n = 0; (i = stridx(decimal, *s)) >= 0;) { |
| 1623 | vals[n] = i; |
| 1624 | while ((i = stridx(decimal, *++s)) >= 0) |
| 1625 | vals[n] = (vals[n] * 10) + i; |
| 1626 | if (*s == 'x' && !vals[n]) { |
| 1627 | while ((i = stridx(hex, *++s)) >= 0) |
| 1628 | vals[n] = (vals[n] * 0x10) + i; |
| 1629 | } |
| 1630 | if (++n == max_vals) |
| 1631 | break; |
| 1632 | if (*s == ',' || *s == ';') |
| 1633 | ++s; |
| 1634 | } |
| 1635 | if (!*s) |
| 1636 | return n; |
| 1637 | } |
| 1638 | return 0; /* zero = nothing matched */ |
| 1639 | } |
| 1640 | |
| 1641 | #ifdef CONFIG_BLK_DEV_ALI14XX |
| 1642 | static int __initdata probe_ali14xx; |
| 1643 | extern int ali14xx_init(void); |
| 1644 | #endif |
| 1645 | #ifdef CONFIG_BLK_DEV_UMC8672 |
| 1646 | static int __initdata probe_umc8672; |
| 1647 | extern int umc8672_init(void); |
| 1648 | #endif |
| 1649 | #ifdef CONFIG_BLK_DEV_DTC2278 |
| 1650 | static int __initdata probe_dtc2278; |
| 1651 | extern int dtc2278_init(void); |
| 1652 | #endif |
| 1653 | #ifdef CONFIG_BLK_DEV_HT6560B |
| 1654 | static int __initdata probe_ht6560b; |
| 1655 | extern int ht6560b_init(void); |
| 1656 | #endif |
| 1657 | #ifdef CONFIG_BLK_DEV_QD65XX |
| 1658 | static int __initdata probe_qd65xx; |
| 1659 | extern int qd65xx_init(void); |
| 1660 | #endif |
| 1661 | |
| 1662 | static int __initdata is_chipset_set[MAX_HWIFS]; |
| 1663 | |
| 1664 | /* |
| 1665 | * ide_setup() gets called VERY EARLY during initialization, |
| 1666 | * to handle kernel "command line" strings beginning with "hdx=" or "ide". |
| 1667 | * |
| 1668 | * Remember to update Documentation/ide.txt if you change something here. |
| 1669 | */ |
| 1670 | static int __init ide_setup(char *s) |
| 1671 | { |
| 1672 | int i, vals[3]; |
| 1673 | ide_hwif_t *hwif; |
| 1674 | ide_drive_t *drive; |
| 1675 | unsigned int hw, unit; |
| 1676 | const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); |
| 1677 | const char max_hwif = '0' + (MAX_HWIFS - 1); |
| 1678 | |
| 1679 | |
| 1680 | if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ |
| 1681 | return 0; /* driver and not us */ |
| 1682 | |
| 1683 | if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) |
| 1684 | return 0; |
| 1685 | |
| 1686 | printk(KERN_INFO "ide_setup: %s", s); |
| 1687 | init_ide_data (); |
| 1688 | |
| 1689 | #ifdef CONFIG_BLK_DEV_IDEDOUBLER |
| 1690 | if (!strcmp(s, "ide=doubler")) { |
| 1691 | extern int ide_doubler; |
| 1692 | |
| 1693 | printk(" : Enabled support for IDE doublers\n"); |
| 1694 | ide_doubler = 1; |
| 1695 | return 1; |
| 1696 | } |
| 1697 | #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ |
| 1698 | |
| 1699 | if (!strcmp(s, "ide=nodma")) { |
| 1700 | printk(" : Prevented DMA\n"); |
| 1701 | noautodma = 1; |
| 1702 | return 1; |
| 1703 | } |
| 1704 | |
| 1705 | #ifdef CONFIG_BLK_DEV_IDEPCI |
| 1706 | if (!strcmp(s, "ide=reverse")) { |
| 1707 | ide_scan_direction = 1; |
| 1708 | printk(" : Enabled support for IDE inverse scan order.\n"); |
| 1709 | return 1; |
| 1710 | } |
| 1711 | #endif /* CONFIG_BLK_DEV_IDEPCI */ |
| 1712 | |
| 1713 | /* |
| 1714 | * Look for drive options: "hdx=" |
| 1715 | */ |
| 1716 | if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { |
| 1717 | const char *hd_words[] = { |
| 1718 | "none", "noprobe", "nowerr", "cdrom", "serialize", |
| 1719 | "autotune", "noautotune", "minus8", "swapdata", "bswap", |
| 1720 | "minus11", "remap", "remap63", "scsi", NULL }; |
| 1721 | unit = s[2] - 'a'; |
| 1722 | hw = unit / MAX_DRIVES; |
| 1723 | unit = unit % MAX_DRIVES; |
| 1724 | hwif = &ide_hwifs[hw]; |
| 1725 | drive = &hwif->drives[unit]; |
| 1726 | if (strncmp(s + 4, "ide-", 4) == 0) { |
| 1727 | strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); |
| 1728 | goto done; |
| 1729 | } |
| 1730 | switch (match_parm(&s[3], hd_words, vals, 3)) { |
| 1731 | case -1: /* "none" */ |
| 1732 | case -2: /* "noprobe" */ |
| 1733 | drive->noprobe = 1; |
| 1734 | goto done; |
| 1735 | case -3: /* "nowerr" */ |
| 1736 | drive->bad_wstat = BAD_R_STAT; |
| 1737 | hwif->noprobe = 0; |
| 1738 | goto done; |
| 1739 | case -4: /* "cdrom" */ |
| 1740 | drive->present = 1; |
| 1741 | drive->media = ide_cdrom; |
| 1742 | /* an ATAPI device ignores DRDY */ |
| 1743 | drive->ready_stat = 0; |
| 1744 | hwif->noprobe = 0; |
| 1745 | goto done; |
| 1746 | case -5: /* "serialize" */ |
| 1747 | printk(" -- USE \"ide%d=serialize\" INSTEAD", hw); |
| 1748 | goto do_serialize; |
| 1749 | case -6: /* "autotune" */ |
| 1750 | drive->autotune = IDE_TUNE_AUTO; |
| 1751 | goto obsolete_option; |
| 1752 | case -7: /* "noautotune" */ |
| 1753 | drive->autotune = IDE_TUNE_NOAUTO; |
| 1754 | goto obsolete_option; |
| 1755 | case -9: /* "swapdata" */ |
| 1756 | case -10: /* "bswap" */ |
| 1757 | drive->bswap = 1; |
| 1758 | goto done; |
| 1759 | case -12: /* "remap" */ |
| 1760 | drive->remap_0_to_1 = 1; |
| 1761 | goto done; |
| 1762 | case -13: /* "remap63" */ |
| 1763 | drive->sect0 = 63; |
| 1764 | goto done; |
| 1765 | case -14: /* "scsi" */ |
| 1766 | drive->scsi = 1; |
| 1767 | goto done; |
| 1768 | case 3: /* cyl,head,sect */ |
| 1769 | drive->media = ide_disk; |
| 1770 | drive->ready_stat = READY_STAT; |
| 1771 | drive->cyl = drive->bios_cyl = vals[0]; |
| 1772 | drive->head = drive->bios_head = vals[1]; |
| 1773 | drive->sect = drive->bios_sect = vals[2]; |
| 1774 | drive->present = 1; |
| 1775 | drive->forced_geom = 1; |
| 1776 | hwif->noprobe = 0; |
| 1777 | goto done; |
| 1778 | default: |
| 1779 | goto bad_option; |
| 1780 | } |
| 1781 | } |
| 1782 | |
| 1783 | if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') |
| 1784 | goto bad_option; |
| 1785 | /* |
| 1786 | * Look for bus speed option: "idebus=" |
| 1787 | */ |
| 1788 | if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { |
| 1789 | if (match_parm(&s[6], NULL, vals, 1) != 1) |
| 1790 | goto bad_option; |
| 1791 | if (vals[0] >= 20 && vals[0] <= 66) { |
| 1792 | idebus_parameter = vals[0]; |
| 1793 | } else |
| 1794 | printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); |
| 1795 | goto done; |
| 1796 | } |
| 1797 | /* |
| 1798 | * Look for interface options: "idex=" |
| 1799 | */ |
| 1800 | if (s[3] >= '0' && s[3] <= max_hwif) { |
| 1801 | /* |
| 1802 | * Be VERY CAREFUL changing this: note hardcoded indexes below |
| 1803 | * (-8, -9, -10) are reserved to ease the hardcoding. |
| 1804 | */ |
| 1805 | static const char *ide_words[] = { |
| 1806 | "noprobe", "serialize", "autotune", "noautotune", |
| 1807 | "reset", "dma", "ata66", "minus8", "minus9", |
| 1808 | "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", |
| 1809 | "dtc2278", "umc8672", "ali14xx", NULL }; |
| 1810 | hw = s[3] - '0'; |
| 1811 | hwif = &ide_hwifs[hw]; |
| 1812 | i = match_parm(&s[4], ide_words, vals, 3); |
| 1813 | |
| 1814 | /* |
| 1815 | * Cryptic check to ensure chipset not already set for hwif. |
| 1816 | * Note: we can't depend on hwif->chipset here. |
| 1817 | */ |
| 1818 | if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { |
| 1819 | /* chipset already specified */ |
| 1820 | if (is_chipset_set[hw]) |
| 1821 | goto bad_option; |
| 1822 | if (i > -18 && i <= -11) { |
| 1823 | /* these drivers are for "ide0=" only */ |
| 1824 | if (hw != 0) |
| 1825 | goto bad_hwif; |
| 1826 | /* chipset already specified for 2nd port */ |
| 1827 | if (is_chipset_set[hw+1]) |
| 1828 | goto bad_option; |
| 1829 | } |
| 1830 | is_chipset_set[hw] = 1; |
| 1831 | printk("\n"); |
| 1832 | } |
| 1833 | |
| 1834 | switch (i) { |
| 1835 | #ifdef CONFIG_BLK_DEV_ALI14XX |
| 1836 | case -17: /* "ali14xx" */ |
| 1837 | probe_ali14xx = 1; |
| 1838 | goto done; |
| 1839 | #endif |
| 1840 | #ifdef CONFIG_BLK_DEV_UMC8672 |
| 1841 | case -16: /* "umc8672" */ |
| 1842 | probe_umc8672 = 1; |
| 1843 | goto done; |
| 1844 | #endif |
| 1845 | #ifdef CONFIG_BLK_DEV_DTC2278 |
| 1846 | case -15: /* "dtc2278" */ |
| 1847 | probe_dtc2278 = 1; |
| 1848 | goto done; |
| 1849 | #endif |
| 1850 | #ifdef CONFIG_BLK_DEV_CMD640 |
| 1851 | case -14: /* "cmd640_vlb" */ |
| 1852 | { |
| 1853 | extern int cmd640_vlb; /* flag for cmd640.c */ |
| 1854 | cmd640_vlb = 1; |
| 1855 | goto done; |
| 1856 | } |
| 1857 | #endif |
| 1858 | #ifdef CONFIG_BLK_DEV_HT6560B |
| 1859 | case -13: /* "ht6560b" */ |
| 1860 | probe_ht6560b = 1; |
| 1861 | goto done; |
| 1862 | #endif |
| 1863 | #ifdef CONFIG_BLK_DEV_QD65XX |
| 1864 | case -12: /* "qd65xx" */ |
| 1865 | probe_qd65xx = 1; |
| 1866 | goto done; |
| 1867 | #endif |
| 1868 | #ifdef CONFIG_BLK_DEV_4DRIVES |
| 1869 | case -11: /* "four" drives on one set of ports */ |
| 1870 | { |
| 1871 | ide_hwif_t *mate = &ide_hwifs[hw^1]; |
| 1872 | mate->drives[0].select.all ^= 0x20; |
| 1873 | mate->drives[1].select.all ^= 0x20; |
| 1874 | hwif->chipset = mate->chipset = ide_4drives; |
| 1875 | mate->irq = hwif->irq; |
| 1876 | memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); |
| 1877 | goto do_serialize; |
| 1878 | } |
| 1879 | #endif /* CONFIG_BLK_DEV_4DRIVES */ |
| 1880 | case -10: /* minus10 */ |
| 1881 | case -9: /* minus9 */ |
| 1882 | case -8: /* minus8 */ |
| 1883 | goto bad_option; |
| 1884 | case -7: /* ata66 */ |
| 1885 | #ifdef CONFIG_BLK_DEV_IDEPCI |
| 1886 | hwif->udma_four = 1; |
| 1887 | goto obsolete_option; |
| 1888 | #else |
| 1889 | goto bad_hwif; |
| 1890 | #endif |
| 1891 | case -6: /* dma */ |
| 1892 | hwif->autodma = 1; |
| 1893 | goto obsolete_option; |
| 1894 | case -5: /* "reset" */ |
| 1895 | hwif->reset = 1; |
| 1896 | goto obsolete_option; |
| 1897 | case -4: /* "noautotune" */ |
| 1898 | hwif->drives[0].autotune = IDE_TUNE_NOAUTO; |
| 1899 | hwif->drives[1].autotune = IDE_TUNE_NOAUTO; |
| 1900 | goto obsolete_option; |
| 1901 | case -3: /* "autotune" */ |
| 1902 | hwif->drives[0].autotune = IDE_TUNE_AUTO; |
| 1903 | hwif->drives[1].autotune = IDE_TUNE_AUTO; |
| 1904 | goto obsolete_option; |
| 1905 | case -2: /* "serialize" */ |
| 1906 | do_serialize: |
| 1907 | hwif->mate = &ide_hwifs[hw^1]; |
| 1908 | hwif->mate->mate = hwif; |
| 1909 | hwif->serialized = hwif->mate->serialized = 1; |
| 1910 | goto obsolete_option; |
| 1911 | |
| 1912 | case -1: /* "noprobe" */ |
| 1913 | hwif->noprobe = 1; |
| 1914 | goto done; |
| 1915 | |
| 1916 | case 1: /* base */ |
| 1917 | vals[1] = vals[0] + 0x206; /* default ctl */ |
| 1918 | case 2: /* base,ctl */ |
| 1919 | vals[2] = 0; /* default irq = probe for it */ |
| 1920 | case 3: /* base,ctl,irq */ |
| 1921 | hwif->hw.irq = vals[2]; |
| 1922 | ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq); |
| 1923 | memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports)); |
| 1924 | hwif->irq = vals[2]; |
| 1925 | hwif->noprobe = 0; |
| 1926 | hwif->chipset = ide_forced; |
| 1927 | goto obsolete_option; |
| 1928 | |
| 1929 | case 0: goto bad_option; |
| 1930 | default: |
| 1931 | printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); |
| 1932 | return 1; |
| 1933 | } |
| 1934 | } |
| 1935 | bad_option: |
| 1936 | printk(" -- BAD OPTION\n"); |
| 1937 | return 1; |
| 1938 | obsolete_option: |
| 1939 | printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); |
| 1940 | return 1; |
| 1941 | bad_hwif: |
| 1942 | printk("-- NOT SUPPORTED ON ide%d", hw); |
| 1943 | done: |
| 1944 | printk("\n"); |
| 1945 | return 1; |
| 1946 | } |
| 1947 | |
| 1948 | extern void pnpide_init(void); |
| 1949 | extern void h8300_ide_init(void); |
| 1950 | |
| 1951 | /* |
| 1952 | * probe_for_hwifs() finds/initializes "known" IDE interfaces |
| 1953 | */ |
| 1954 | static void __init probe_for_hwifs (void) |
| 1955 | { |
| 1956 | #ifdef CONFIG_BLK_DEV_IDEPCI |
| 1957 | ide_scan_pcibus(ide_scan_direction); |
| 1958 | #endif /* CONFIG_BLK_DEV_IDEPCI */ |
| 1959 | |
| 1960 | #ifdef CONFIG_ETRAX_IDE |
| 1961 | { |
| 1962 | extern void init_e100_ide(void); |
| 1963 | init_e100_ide(); |
| 1964 | } |
| 1965 | #endif /* CONFIG_ETRAX_IDE */ |
| 1966 | #ifdef CONFIG_BLK_DEV_CMD640 |
| 1967 | { |
| 1968 | extern void ide_probe_for_cmd640x(void); |
| 1969 | ide_probe_for_cmd640x(); |
| 1970 | } |
| 1971 | #endif /* CONFIG_BLK_DEV_CMD640 */ |
| 1972 | #ifdef CONFIG_BLK_DEV_IDE_PMAC |
| 1973 | { |
| 1974 | extern void pmac_ide_probe(void); |
| 1975 | pmac_ide_probe(); |
| 1976 | } |
| 1977 | #endif /* CONFIG_BLK_DEV_IDE_PMAC */ |
| 1978 | #ifdef CONFIG_BLK_DEV_GAYLE |
| 1979 | { |
| 1980 | extern void gayle_init(void); |
| 1981 | gayle_init(); |
| 1982 | } |
| 1983 | #endif /* CONFIG_BLK_DEV_GAYLE */ |
| 1984 | #ifdef CONFIG_BLK_DEV_FALCON_IDE |
| 1985 | { |
| 1986 | extern void falconide_init(void); |
| 1987 | falconide_init(); |
| 1988 | } |
| 1989 | #endif /* CONFIG_BLK_DEV_FALCON_IDE */ |
| 1990 | #ifdef CONFIG_BLK_DEV_MAC_IDE |
| 1991 | { |
| 1992 | extern void macide_init(void); |
| 1993 | macide_init(); |
| 1994 | } |
| 1995 | #endif /* CONFIG_BLK_DEV_MAC_IDE */ |
| 1996 | #ifdef CONFIG_BLK_DEV_Q40IDE |
| 1997 | { |
| 1998 | extern void q40ide_init(void); |
| 1999 | q40ide_init(); |
| 2000 | } |
| 2001 | #endif /* CONFIG_BLK_DEV_Q40IDE */ |
| 2002 | #ifdef CONFIG_BLK_DEV_BUDDHA |
| 2003 | { |
| 2004 | extern void buddha_init(void); |
| 2005 | buddha_init(); |
| 2006 | } |
| 2007 | #endif /* CONFIG_BLK_DEV_BUDDHA */ |
| 2008 | #ifdef CONFIG_BLK_DEV_IDEPNP |
| 2009 | pnpide_init(); |
| 2010 | #endif |
| 2011 | #ifdef CONFIG_H8300 |
| 2012 | h8300_ide_init(); |
| 2013 | #endif |
| 2014 | } |
| 2015 | |
| 2016 | int ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver) |
| 2017 | { |
| 2018 | unsigned long flags; |
| 2019 | |
| 2020 | spin_lock_irqsave(&ide_lock, flags); |
| 2021 | if (!drive->present || drive->driver != NULL || |
| 2022 | drive->usage || drive->dead) { |
| 2023 | spin_unlock_irqrestore(&ide_lock, flags); |
| 2024 | return 1; |
| 2025 | } |
| 2026 | drive->driver = driver; |
| 2027 | spin_unlock_irqrestore(&ide_lock, flags); |
| 2028 | spin_lock(&drives_lock); |
| 2029 | list_add_tail(&drive->list, driver ? &driver->drives : &ide_drives); |
| 2030 | spin_unlock(&drives_lock); |
| 2031 | // printk(KERN_INFO "%s: attached %s driver.\n", drive->name, driver->name); |
| 2032 | #ifdef CONFIG_PROC_FS |
| 2033 | if (driver) |
| 2034 | ide_add_proc_entries(drive->proc, driver->proc, drive); |
| 2035 | #endif |
| 2036 | return 0; |
| 2037 | } |
| 2038 | |
| 2039 | EXPORT_SYMBOL(ide_register_subdriver); |
| 2040 | |
| 2041 | /** |
| 2042 | * ide_unregister_subdriver - disconnect drive from driver |
| 2043 | * @drive: drive to unplug |
| 2044 | * |
| 2045 | * Disconnect a drive from the driver it was attached to and then |
| 2046 | * clean up the various proc files and other objects attached to it. |
| 2047 | * |
| 2048 | * Takes ide_setting_sem, ide_lock and drives_lock. |
| 2049 | * Caller must hold none of the locks. |
| 2050 | * |
| 2051 | * No locking versus subdriver unload because we are moving to the |
| 2052 | * default driver anyway. Wants double checking. |
| 2053 | */ |
| 2054 | |
| 2055 | int ide_unregister_subdriver (ide_drive_t *drive) |
| 2056 | { |
| 2057 | unsigned long flags; |
| 2058 | |
| 2059 | down(&ide_setting_sem); |
| 2060 | spin_lock_irqsave(&ide_lock, flags); |
| 2061 | if (drive->usage || drive->driver == NULL || DRIVER(drive)->busy) { |
| 2062 | spin_unlock_irqrestore(&ide_lock, flags); |
| 2063 | up(&ide_setting_sem); |
| 2064 | return 1; |
| 2065 | } |
| 2066 | #ifdef CONFIG_PROC_FS |
| 2067 | ide_remove_proc_entries(drive->proc, DRIVER(drive)->proc); |
| 2068 | #endif |
| 2069 | auto_remove_settings(drive); |
| 2070 | drive->driver = NULL; |
| 2071 | spin_unlock_irqrestore(&ide_lock, flags); |
| 2072 | up(&ide_setting_sem); |
| 2073 | spin_lock(&drives_lock); |
| 2074 | list_del_init(&drive->list); |
| 2075 | spin_unlock(&drives_lock); |
| 2076 | /* drive will be added to &ide_drives in ata_attach() */ |
| 2077 | return 0; |
| 2078 | } |
| 2079 | |
| 2080 | EXPORT_SYMBOL(ide_unregister_subdriver); |
| 2081 | |
| 2082 | static int ide_drive_remove(struct device * dev) |
| 2083 | { |
| 2084 | ide_drive_t * drive = container_of(dev,ide_drive_t,gendev); |
| 2085 | DRIVER(drive)->cleanup(drive); |
| 2086 | return 0; |
| 2087 | } |
| 2088 | |
| 2089 | /** |
| 2090 | * ide_register_driver - register IDE device driver |
| 2091 | * @driver: the IDE device driver |
| 2092 | * |
| 2093 | * Register a new device driver and then scan the devices |
| 2094 | * on the IDE bus in case any should be attached to the |
| 2095 | * driver we have just registered. If so attach them. |
| 2096 | * |
| 2097 | * Takes drivers_lock and drives_lock. |
| 2098 | */ |
| 2099 | |
| 2100 | int ide_register_driver(ide_driver_t *driver) |
| 2101 | { |
| 2102 | struct list_head list; |
| 2103 | struct list_head *list_loop; |
| 2104 | struct list_head *tmp_storage; |
| 2105 | |
| 2106 | spin_lock(&drivers_lock); |
| 2107 | list_add(&driver->drivers, &drivers); |
| 2108 | spin_unlock(&drivers_lock); |
| 2109 | |
| 2110 | INIT_LIST_HEAD(&list); |
| 2111 | spin_lock(&drives_lock); |
| 2112 | list_splice_init(&ide_drives, &list); |
| 2113 | spin_unlock(&drives_lock); |
| 2114 | |
| 2115 | list_for_each_safe(list_loop, tmp_storage, &list) { |
| 2116 | ide_drive_t *drive = container_of(list_loop, ide_drive_t, list); |
| 2117 | list_del_init(&drive->list); |
| 2118 | if (drive->present) |
| 2119 | ata_attach(drive); |
| 2120 | } |
| 2121 | driver->gen_driver.name = (char *) driver->name; |
| 2122 | driver->gen_driver.bus = &ide_bus_type; |
| 2123 | driver->gen_driver.remove = ide_drive_remove; |
| 2124 | return driver_register(&driver->gen_driver); |
| 2125 | } |
| 2126 | |
| 2127 | EXPORT_SYMBOL(ide_register_driver); |
| 2128 | |
| 2129 | /** |
| 2130 | * ide_unregister_driver - unregister IDE device driver |
| 2131 | * @driver: the IDE device driver |
| 2132 | * |
| 2133 | * Called when a driver module is being unloaded. We reattach any |
| 2134 | * devices to whatever driver claims them next (typically the default |
| 2135 | * driver). |
| 2136 | * |
| 2137 | * Takes drivers_lock and called functions will take ide_setting_sem. |
| 2138 | */ |
| 2139 | |
| 2140 | void ide_unregister_driver(ide_driver_t *driver) |
| 2141 | { |
| 2142 | ide_drive_t *drive; |
| 2143 | |
| 2144 | spin_lock(&drivers_lock); |
| 2145 | list_del(&driver->drivers); |
| 2146 | spin_unlock(&drivers_lock); |
| 2147 | |
| 2148 | driver_unregister(&driver->gen_driver); |
| 2149 | |
| 2150 | while(!list_empty(&driver->drives)) { |
| 2151 | drive = list_entry(driver->drives.next, ide_drive_t, list); |
| 2152 | if (driver->cleanup(drive)) { |
| 2153 | printk(KERN_ERR "%s: cleanup_module() called while still busy\n", drive->name); |
| 2154 | BUG(); |
| 2155 | } |
| 2156 | ata_attach(drive); |
| 2157 | } |
| 2158 | } |
| 2159 | |
| 2160 | EXPORT_SYMBOL(ide_unregister_driver); |
| 2161 | |
| 2162 | /* |
| 2163 | * Probe module |
| 2164 | */ |
| 2165 | |
| 2166 | EXPORT_SYMBOL(ide_lock); |
| 2167 | |
| 2168 | struct bus_type ide_bus_type = { |
| 2169 | .name = "ide", |
| 2170 | .suspend = generic_ide_suspend, |
| 2171 | .resume = generic_ide_resume, |
| 2172 | }; |
| 2173 | |
| 2174 | /* |
| 2175 | * This is gets invoked once during initialization, to set *everything* up |
| 2176 | */ |
| 2177 | static int __init ide_init(void) |
| 2178 | { |
| 2179 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n"); |
| 2180 | devfs_mk_dir("ide"); |
| 2181 | system_bus_speed = ide_system_bus_speed(); |
| 2182 | |
| 2183 | bus_register(&ide_bus_type); |
| 2184 | |
| 2185 | init_ide_data(); |
| 2186 | |
| 2187 | #ifdef CONFIG_PROC_FS |
| 2188 | proc_ide_root = proc_mkdir("ide", NULL); |
| 2189 | #endif |
| 2190 | |
| 2191 | #ifdef CONFIG_BLK_DEV_ALI14XX |
| 2192 | if (probe_ali14xx) |
| 2193 | (void)ali14xx_init(); |
| 2194 | #endif |
| 2195 | #ifdef CONFIG_BLK_DEV_UMC8672 |
| 2196 | if (probe_umc8672) |
| 2197 | (void)umc8672_init(); |
| 2198 | #endif |
| 2199 | #ifdef CONFIG_BLK_DEV_DTC2278 |
| 2200 | if (probe_dtc2278) |
| 2201 | (void)dtc2278_init(); |
| 2202 | #endif |
| 2203 | #ifdef CONFIG_BLK_DEV_HT6560B |
| 2204 | if (probe_ht6560b) |
| 2205 | (void)ht6560b_init(); |
| 2206 | #endif |
| 2207 | #ifdef CONFIG_BLK_DEV_QD65XX |
| 2208 | if (probe_qd65xx) |
| 2209 | (void)qd65xx_init(); |
| 2210 | #endif |
| 2211 | |
| 2212 | initializing = 1; |
| 2213 | /* Probe for special PCI and other "known" interface chipsets. */ |
| 2214 | probe_for_hwifs(); |
| 2215 | initializing = 0; |
| 2216 | |
| 2217 | #ifdef CONFIG_PROC_FS |
| 2218 | proc_ide_create(); |
| 2219 | #endif |
| 2220 | return 0; |
| 2221 | } |
| 2222 | |
| 2223 | #ifdef MODULE |
| 2224 | static char *options = NULL; |
| 2225 | module_param(options, charp, 0); |
| 2226 | MODULE_LICENSE("GPL"); |
| 2227 | |
| 2228 | static void __init parse_options (char *line) |
| 2229 | { |
| 2230 | char *next = line; |
| 2231 | |
| 2232 | if (line == NULL || !*line) |
| 2233 | return; |
| 2234 | while ((line = next) != NULL) { |
| 2235 | if ((next = strchr(line,' ')) != NULL) |
| 2236 | *next++ = 0; |
| 2237 | if (!ide_setup(line)) |
| 2238 | printk (KERN_INFO "Unknown option '%s'\n", line); |
| 2239 | } |
| 2240 | } |
| 2241 | |
| 2242 | int init_module (void) |
| 2243 | { |
| 2244 | parse_options(options); |
| 2245 | return ide_init(); |
| 2246 | } |
| 2247 | |
| 2248 | void cleanup_module (void) |
| 2249 | { |
| 2250 | int index; |
| 2251 | |
| 2252 | for (index = 0; index < MAX_HWIFS; ++index) |
| 2253 | ide_unregister(index); |
| 2254 | |
| 2255 | #ifdef CONFIG_PROC_FS |
| 2256 | proc_ide_destroy(); |
| 2257 | #endif |
| 2258 | devfs_remove("ide"); |
| 2259 | |
| 2260 | bus_unregister(&ide_bus_type); |
| 2261 | } |
| 2262 | |
| 2263 | #else /* !MODULE */ |
| 2264 | |
| 2265 | __setup("", ide_setup); |
| 2266 | |
| 2267 | module_init(ide_init); |
| 2268 | |
| 2269 | #endif /* MODULE */ |