| /* |
| * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
| * |
| * Mostly written by Mark Lord <mlord@pobox.com> |
| * and Gadi Oxman <gadio@netvision.net.il> |
| * and Andre Hedrick <andre@linux-ide.org> |
| * |
| * See linux/MAINTAINERS for address of current maintainer. |
| * |
| * This is the multiple IDE interface driver, as evolved from hd.c. |
| * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs (usually 14 & 15). |
| * There can be up to two drives per interface, as per the ATA-2 spec. |
| * |
| * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64 |
| * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64 |
| * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64 |
| * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64 |
| * ... |
| * |
| * From hd.c: |
| * | |
| * | It traverses the request-list, using interrupts to jump between functions. |
| * | As nearly all functions can be called within interrupts, we may not sleep. |
| * | Special care is recommended. Have Fun! |
| * | |
| * | modified by Drew Eckhardt to check nr of hd's from the CMOS. |
| * | |
| * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug |
| * | in the early extended-partition checks and added DM partitions. |
| * | |
| * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI). |
| * | |
| * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads", |
| * | and general streamlining by Mark Lord (mlord@pobox.com). |
| * |
| * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by: |
| * |
| * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg) |
| * Delman Lee (delman@ieee.org) ("Mr. atdisk2") |
| * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom) |
| * |
| * This was a rewrite of just about everything from hd.c, though some original |
| * code is still sprinkled about. Think of it as a major evolution, with |
| * inspiration from lots of linux users, esp. hamish@zot.apana.org.au |
| * |
| * Version 1.0 ALPHA initial code, primary i/f working okay |
| * Version 1.3 BETA dual i/f on shared irq tested & working! |
| * Version 1.4 BETA added auto probing for irq(s) |
| * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms, |
| * ... |
| * Version 5.50 allow values as small as 20 for idebus= |
| * Version 5.51 force non io_32bit in drive_cmd_intr() |
| * change delay_10ms() to delay_50ms() to fix problems |
| * Version 5.52 fix incorrect invalidation of removable devices |
| * add "hdx=slow" command line option |
| * Version 5.60 start to modularize the driver; the disk and ATAPI |
| * drivers can be compiled as loadable modules. |
| * move IDE probe code to ide-probe.c |
| * move IDE disk code to ide-disk.c |
| * add support for generic IDE device subdrivers |
| * add m68k code from Geert Uytterhoeven |
| * probe all interfaces by default |
| * add ioctl to (re)probe an interface |
| * Version 6.00 use per device request queues |
| * attempt to optimize shared hwgroup performance |
| * add ioctl to manually adjust bandwidth algorithms |
| * add kerneld support for the probe module |
| * fix bug in ide_error() |
| * fix bug in the first ide_get_lock() call for Atari |
| * don't flush leftover data for ATAPI devices |
| * Version 6.01 clear hwgroup->active while the hwgroup sleeps |
| * support HDIO_GETGEO for floppies |
| * Version 6.02 fix ide_ack_intr() call |
| * check partition table on floppies |
| * Version 6.03 handle bad status bit sequencing in ide_wait_stat() |
| * Version 6.10 deleted old entries from this list of updates |
| * replaced triton.c with ide-dma.c generic PCI DMA |
| * added support for BIOS-enabled UltraDMA |
| * rename all "promise" things to "pdc4030" |
| * fix EZ-DRIVE handling on small disks |
| * Version 6.11 fix probe error in ide_scan_devices() |
| * fix ancient "jiffies" polling bugs |
| * mask all hwgroup interrupts on each irq entry |
| * Version 6.12 integrate ioctl and proc interfaces |
| * fix parsing of "idex=" command line parameter |
| * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com |
| * Version 6.14 fixed IRQ sharing among PCI devices |
| * Version 6.15 added SMP awareness to IDE drivers |
| * Version 6.16 fixed various bugs; even more SMP friendly |
| * Version 6.17 fix for newest EZ-Drive problem |
| * Version 6.18 default unpartitioned-disk translation now "BIOS LBA" |
| * Version 6.19 Re-design for a UNIFORM driver for all platforms, |
| * model based on suggestions from Russell King and |
| * Geert Uytterhoeven |
| * Promise DC4030VL now supported. |
| * add support for ide6/ide7 |
| * delay_50ms() changed to ide_delay_50ms() and exported. |
| * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection. |
| * Added hdx=flash to allow for second flash disk |
| * detection w/o the hang loop. |
| * Added support for ide8/ide9 |
| * Added idex=ata66 for the quirky chipsets that are |
| * ATA-66 compliant, but have yet to determine a method |
| * of verification of the 80c cable presence. |
| * Specifically Promise's PDC20262 chipset. |
| * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old |
| * hat that clarified original low level driver design. |
| * Version 6.30 Added SMP support; fixed multmode issues. -ml |
| * Version 6.31 Debug Share INTR's and request queue streaming |
| * Native ATA-100 support |
| * Prep for Cascades Project |
| * Version 6.32 4GB highmem support for DMA, and mapping of those for |
| * PIO transfer (Jens Axboe) |
| * |
| * Some additional driver compile-time options are in ./include/linux/ide.h |
| */ |
| |
| #define VERSION "7.0.0" |
| |
| #include <linux/config.h> |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/kernel.h> |
| #include <linux/timer.h> |
| #include <linux/mm.h> |
| #include <linux/interrupt.h> |
| #include <linux/major.h> |
| #include <linux/errno.h> |
| #include <linux/genhd.h> |
| #include <linux/blkpg.h> |
| #include <linux/slab.h> |
| #ifndef MODULE |
| # include <linux/init.h> |
| #endif |
| #include <linux/pci.h> |
| #include <linux/delay.h> |
| #include <linux/ide.h> |
| #include <linux/devfs_fs_kernel.h> |
| #include <linux/completion.h> |
| #include <linux/reboot.h> |
| #include <linux/cdrom.h> |
| #include <linux/device.h> |
| #include <linux/kmod.h> |
| |
| #include <asm/byteorder.h> |
| #include <asm/irq.h> |
| #include <asm/uaccess.h> |
| #include <asm/io.h> |
| #include <asm/bitops.h> |
| |
| #include "ide_modes.h" |
| |
| /* |
| * Those will be moved into separate header files eventually. |
| */ |
| #ifdef CONFIG_BLK_DEV_RZ1000 |
| extern void ide_probe_for_rz100x(void); |
| #endif |
| #ifdef CONFIG_ETRAX_IDE |
| extern void init_e100_ide(void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_CMD640 |
| extern void ide_probe_for_cmd640x(void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_PDC4030 |
| extern int ide_probe_for_pdc4030(void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDE_PMAC |
| extern void pmac_ide_probe(void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDE_ICSIDE |
| extern void icside_init(void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDE_RAPIDE |
| extern void rapide_init(void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_GAYLE |
| extern void gayle_init(void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_FALCON_IDE |
| extern void falconide_init(void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_MAC_IDE |
| extern void macide_init(void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_Q40IDE |
| extern void q40ide_init(void); |
| #endif |
| #ifdef CONFIG_BLK_DEV_BUDDHA |
| extern void buddha_init(void); |
| #endif |
| #if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_ISAPNP) |
| extern void pnpide_init(int); |
| #endif |
| |
| /* |
| * Constant tables for PIO mode programming: |
| */ |
| const ide_pio_timings_t ide_pio_timings[6] = { |
| { 70, 165, 600 }, /* PIO Mode 0 */ |
| { 50, 125, 383 }, /* PIO Mode 1 */ |
| { 30, 100, 240 }, /* PIO Mode 2 */ |
| { 30, 80, 180 }, /* PIO Mode 3 with IORDY */ |
| { 25, 70, 120 }, /* PIO Mode 4 with IORDY */ |
| { 20, 50, 100 } /* PIO Mode 5 with IORDY (nonstandard) */ |
| }; |
| |
| /* |
| * Black list. Some drives incorrectly report their maximal PIO mode, |
| * at least in respect to CMD640. Here we keep info on some known drives. |
| */ |
| static struct ide_pio_info { |
| const char *name; |
| int pio; |
| } ide_pio_blacklist[] = { |
| /* { "Conner Peripherals 1275MB - CFS1275A", 4 }, */ |
| { "Conner Peripherals 540MB - CFS540A", 3 }, |
| |
| { "WDC AC2700", 3 }, |
| { "WDC AC2540", 3 }, |
| { "WDC AC2420", 3 }, |
| { "WDC AC2340", 3 }, |
| { "WDC AC2250", 0 }, |
| { "WDC AC2200", 0 }, |
| { "WDC AC21200", 4 }, |
| { "WDC AC2120", 0 }, |
| { "WDC AC2850", 3 }, |
| { "WDC AC1270", 3 }, |
| { "WDC AC1170", 1 }, |
| { "WDC AC1210", 1 }, |
| { "WDC AC280", 0 }, |
| /* { "WDC AC21000", 4 }, */ |
| { "WDC AC31000", 3 }, |
| { "WDC AC31200", 3 }, |
| /* { "WDC AC31600", 4 }, */ |
| |
| { "Maxtor 7131 AT", 1 }, |
| { "Maxtor 7171 AT", 1 }, |
| { "Maxtor 7213 AT", 1 }, |
| { "Maxtor 7245 AT", 1 }, |
| { "Maxtor 7345 AT", 1 }, |
| { "Maxtor 7546 AT", 3 }, |
| { "Maxtor 7540 AV", 3 }, |
| |
| { "SAMSUNG SHD-3121A", 1 }, |
| { "SAMSUNG SHD-3122A", 1 }, |
| { "SAMSUNG SHD-3172A", 1 }, |
| |
| /* { "ST51080A", 4 }, |
| * { "ST51270A", 4 }, |
| * { "ST31220A", 4 }, |
| * { "ST31640A", 4 }, |
| * { "ST32140A", 4 }, |
| * { "ST3780A", 4 }, |
| */ |
| { "ST5660A", 3 }, |
| { "ST3660A", 3 }, |
| { "ST3630A", 3 }, |
| { "ST3655A", 3 }, |
| { "ST3391A", 3 }, |
| { "ST3390A", 1 }, |
| { "ST3600A", 1 }, |
| { "ST3290A", 0 }, |
| { "ST3144A", 0 }, |
| { "ST3491A", 1 }, /* reports 3, should be 1 or 2 (depending on |
| * drive) according to Seagates FIND-ATA program */ |
| |
| { "QUANTUM ELS127A", 0 }, |
| { "QUANTUM ELS170A", 0 }, |
| { "QUANTUM LPS240A", 0 }, |
| { "QUANTUM LPS210A", 3 }, |
| { "QUANTUM LPS270A", 3 }, |
| { "QUANTUM LPS365A", 3 }, |
| { "QUANTUM LPS540A", 3 }, |
| { "QUANTUM LIGHTNING 540A", 3 }, |
| { "QUANTUM LIGHTNING 730A", 3 }, |
| |
| { "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */ |
| { "QUANTUM FIREBALL_640", 3 }, |
| { "QUANTUM FIREBALL_1080", 3 }, |
| { "QUANTUM FIREBALL_1280", 3 }, |
| { NULL, 0 } |
| }; |
| |
| /* default maximum number of failures */ |
| #define IDE_DEFAULT_MAX_FAILURES 1 |
| |
| static int idebus_parameter; /* holds the "idebus=" parameter */ |
| int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ |
| static int initializing; /* set while initializing built-in drivers */ |
| |
| /* |
| * Protects access to global structures etc. |
| */ |
| spinlock_t ide_lock __cacheline_aligned = SPIN_LOCK_UNLOCKED; |
| |
| #ifdef CONFIG_BLK_DEV_IDEPCI |
| static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */ |
| #endif |
| |
| #if defined(__mc68000__) || defined(CONFIG_APUS) |
| /* |
| * This is used by the Atari code to obtain access to the IDE interrupt, |
| * which is shared between several drivers. |
| */ |
| static int ide_intr_lock; |
| #endif |
| |
| int noautodma = 0; |
| |
| /* |
| * This is declared extern in ide.h, for access by other IDE modules: |
| */ |
| ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ |
| |
| |
| /* |
| * This routine searches the ide_pio_blacklist for an entry |
| * matching the start/whole of the supplied model name. |
| * |
| * Returns -1 if no match found. |
| * Otherwise returns the recommended PIO mode from ide_pio_blacklist[]. |
| */ |
| int ide_scan_pio_blacklist (char *model) |
| { |
| struct ide_pio_info *p; |
| |
| for (p = ide_pio_blacklist; p->name != NULL; p++) { |
| if (strncmp(p->name, model, strlen(p->name)) == 0) |
| return p->pio; |
| } |
| return -1; |
| } |
| |
| /* |
| * This routine returns the recommended PIO settings for a given drive, |
| * based on the drive->id information and the ide_pio_blacklist[]. |
| * This is used by most chipset support modules when "auto-tuning". |
| */ |
| |
| /* |
| * Drive PIO mode auto selection |
| */ |
| byte ide_get_best_pio_mode (ide_drive_t *drive, byte mode_wanted, byte max_mode, ide_pio_data_t *d) |
| { |
| int pio_mode; |
| int cycle_time = 0; |
| int use_iordy = 0; |
| struct hd_driveid* id = drive->id; |
| int overridden = 0; |
| int blacklisted = 0; |
| |
| if (mode_wanted != 255) { |
| pio_mode = mode_wanted; |
| } else if (!drive->id) { |
| pio_mode = 0; |
| } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) { |
| overridden = 1; |
| blacklisted = 1; |
| use_iordy = (pio_mode > 2); |
| } else { |
| pio_mode = id->tPIO; |
| if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */ |
| pio_mode = 2; |
| overridden = 1; |
| } |
| if (id->field_valid & 2) { /* drive implements ATA2? */ |
| if (id->capability & 8) { /* drive supports use_iordy? */ |
| use_iordy = 1; |
| cycle_time = id->eide_pio_iordy; |
| if (id->eide_pio_modes & 7) { |
| overridden = 0; |
| if (id->eide_pio_modes & 4) |
| pio_mode = 5; |
| else if (id->eide_pio_modes & 2) |
| pio_mode = 4; |
| else |
| pio_mode = 3; |
| } |
| } else { |
| cycle_time = id->eide_pio; |
| } |
| } |
| |
| #if 0 |
| if (drive->id->major_rev_num & 0x0004) printk("ATA-2 "); |
| #endif |
| |
| /* |
| * Conservative "downgrade" for all pre-ATA2 drives |
| */ |
| if (pio_mode && pio_mode < 4) { |
| pio_mode--; |
| overridden = 1; |
| #if 0 |
| use_iordy = (pio_mode > 2); |
| #endif |
| if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time) |
| cycle_time = 0; /* use standard timing */ |
| } |
| } |
| if (pio_mode > max_mode) { |
| pio_mode = max_mode; |
| cycle_time = 0; |
| } |
| if (d) { |
| d->pio_mode = pio_mode; |
| d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time; |
| d->use_iordy = use_iordy; |
| d->overridden = overridden; |
| d->blacklisted = blacklisted; |
| } |
| return pio_mode; |
| } |
| |
| #if (DISK_RECOVERY_TIME > 0) |
| /* |
| * For really screwed hardware (hey, at least it *can* be used with Linux) |
| * we can enforce a minimum delay time between successive operations. |
| */ |
| static unsigned long read_timer (void) |
| { |
| unsigned long t, flags; |
| int i; |
| |
| __save_flags(flags); /* local CPU only */ |
| __cli(); /* local CPU only */ |
| t = jiffies * 11932; |
| outb_p(0, 0x43); |
| i = inb_p(0x40); |
| i |= inb(0x40) << 8; |
| __restore_flags(flags); /* local CPU only */ |
| return (t - i); |
| } |
| #endif /* DISK_RECOVERY_TIME */ |
| |
| static inline void set_recovery_timer (ide_hwif_t *hwif) |
| { |
| #if (DISK_RECOVERY_TIME > 0) |
| hwif->last_time = read_timer(); |
| #endif /* DISK_RECOVERY_TIME */ |
| } |
| |
| /* |
| * Do not even *think* about calling this! |
| */ |
| static void init_hwif_data (unsigned int index) |
| { |
| static const byte ide_major[] = { |
| IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, |
| IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR |
| }; |
| |
| unsigned int unit; |
| hw_regs_t hw; |
| ide_hwif_t *hwif = &ide_hwifs[index]; |
| |
| /* bulk initialize hwif & drive info with zeros */ |
| memset(hwif, 0, sizeof(ide_hwif_t)); |
| memset(&hw, 0, sizeof(hw_regs_t)); |
| |
| /* fill in any non-zero initial values */ |
| hwif->index = index; |
| ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); |
| memcpy(&hwif->hw, &hw, sizeof(hw)); |
| memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); |
| hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; |
| #ifdef CONFIG_BLK_DEV_HD |
| if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) |
| hwif->noprobe = 1; /* may be overridden by ide_setup() */ |
| #endif /* CONFIG_BLK_DEV_HD */ |
| hwif->major = ide_major[index]; |
| sprintf(hwif->name, "ide%d", index); |
| hwif->bus_state = BUSSTATE_ON; |
| for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| ide_drive_t *drive = &hwif->drives[unit]; |
| |
| drive->type = ATA_DISK; |
| drive->select.all = (unit<<4)|0xa0; |
| drive->hwif = hwif; |
| drive->ctl = 0x08; |
| drive->ready_stat = READY_STAT; |
| drive->bad_wstat = BAD_W_STAT; |
| drive->special.b.recalibrate = 1; |
| drive->special.b.set_geometry = 1; |
| sprintf(drive->name, "hd%c", 'a' + (index * MAX_DRIVES) + unit); |
| drive->max_failures = IDE_DEFAULT_MAX_FAILURES; |
| init_waitqueue_head(&drive->wqueue); |
| } |
| } |
| |
| /* |
| * init_ide_data() sets reasonable default values into all fields |
| * of all instances of the hwifs and drives, but only on the first call. |
| * Subsequent calls have no effect (they don't wipe out anything). |
| * |
| * This routine is normally called at driver initialization time, |
| * but may also be called MUCH earlier during kernel "command-line" |
| * parameter processing. As such, we cannot depend on any other parts |
| * of the kernel (such as memory allocation) to be functioning yet. |
| * |
| * This is too bad, as otherwise we could dynamically allocate the |
| * ide_drive_t structs as needed, rather than always consuming memory |
| * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. |
| */ |
| #define MAGIC_COOKIE 0x12345678 |
| static void __init init_ide_data (void) |
| { |
| unsigned int index; |
| static unsigned long magic_cookie = MAGIC_COOKIE; |
| |
| if (magic_cookie != MAGIC_COOKIE) |
| return; /* already initialized */ |
| magic_cookie = 0; |
| |
| /* Initialize all interface structures */ |
| for (index = 0; index < MAX_HWIFS; ++index) |
| init_hwif_data(index); |
| |
| /* Add default hw interfaces */ |
| ide_init_default_hwifs(); |
| |
| idebus_parameter = 0; |
| } |
| |
| /* |
| * CompactFlash cards and their relatives pretend to be removable hard disks, except: |
| * (1) they never have a slave unit, and |
| * (2) they don't have a door lock mechanisms. |
| * This test catches them, and is invoked elsewhere when setting appropriate config bits. |
| * |
| * FIXME FIXME: Yes this is for certain applicable for all of them as time has shown. |
| * |
| * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD) devices, |
| * so in linux 2.3.x we should change this to just treat all PCMCIA drives this way, |
| * and get rid of the model-name tests below (too big of an interface change for 2.2.x). |
| * At that time, we might also consider parameterizing the timeouts and retries, |
| * since these are MUCH faster than mechanical drives. -M.Lord |
| */ |
| int drive_is_flashcard (ide_drive_t *drive) |
| { |
| struct hd_driveid *id = drive->id; |
| |
| if (drive->removable && id != NULL) { |
| if (id->config == 0x848a) |
| return 1; /* CompactFlash */ |
| if (!strncmp(id->model, "KODAK ATA_FLASH", 15) /* Kodak */ |
| || !strncmp(id->model, "Hitachi CV", 10) /* Hitachi */ |
| || !strncmp(id->model, "SunDisk SDCFB", 13) /* SunDisk */ |
| || !strncmp(id->model, "HAGIWARA HPC", 12) /* Hagiwara */ |
| || !strncmp(id->model, "LEXAR ATA_FLASH", 15) /* Lexar */ |
| || !strncmp(id->model, "ATA_FLASH", 9)) /* Simple Tech */ |
| { |
| return 1; /* yes, it is a flash memory card */ |
| } |
| } |
| return 0; /* no, it is not a flash memory card */ |
| } |
| |
| int __ide_end_request(ide_drive_t *drive, int uptodate, int nr_secs) |
| { |
| struct request *rq; |
| unsigned long flags; |
| int ret = 1; |
| |
| spin_lock_irqsave(&ide_lock, flags); |
| rq = HWGROUP(drive)->rq; |
| |
| BUG_ON(!(rq->flags & REQ_STARTED)); |
| |
| /* |
| * small hack to eliminate locking from ide_end_request to grab |
| * the first segment number of sectors |
| */ |
| if (!nr_secs) |
| nr_secs = rq->hard_cur_sectors; |
| |
| /* |
| * decide whether to reenable DMA -- 3 is a random magic for now, |
| * if we DMA timeout more than 3 times, just stay in PIO |
| */ |
| if (drive->state == DMA_PIO_RETRY && drive->retry_pio <= 3) { |
| drive->state = 0; |
| HWGROUP(drive)->hwif->dmaproc(ide_dma_on, drive); |
| } |
| |
| if (!end_that_request_first(rq, uptodate, nr_secs)) { |
| add_blkdev_randomness(major(rq->rq_dev)); |
| blkdev_dequeue_request(rq); |
| HWGROUP(drive)->rq = NULL; |
| end_that_request_last(rq); |
| ret = 0; |
| } |
| |
| spin_unlock_irqrestore(&ide_lock, flags); |
| return ret; |
| } |
| |
| /* |
| * This should get invoked any time we exit the driver to |
| * wait for an interrupt response from a drive. handler() points |
| * at the appropriate code to handle the next interrupt, and a |
| * timer is started to prevent us from waiting forever in case |
| * something goes wrong (see the ide_timer_expiry() handler later on). |
| */ |
| void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, |
| unsigned int timeout, ide_expiry_t *expiry) |
| { |
| unsigned long flags; |
| ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| |
| spin_lock_irqsave(&ide_lock, flags); |
| if (hwgroup->handler != NULL) { |
| printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n", |
| drive->name, hwgroup->handler, handler); |
| } |
| hwgroup->handler = handler; |
| hwgroup->expiry = expiry; |
| hwgroup->timer.expires = jiffies + timeout; |
| add_timer(&hwgroup->timer); |
| spin_unlock_irqrestore(&ide_lock, flags); |
| } |
| |
| static void ata_pre_reset (ide_drive_t *drive) |
| { |
| if (ata_ops(drive) && ata_ops(drive)->pre_reset) |
| ata_ops(drive)->pre_reset(drive); |
| |
| if (!drive->keep_settings && !drive->using_dma) { |
| drive->unmask = 0; |
| drive->io_32bit = 0; |
| } |
| |
| if (drive->using_dma) { |
| /* check the DMA crc count */ |
| if (drive->crc_count) { |
| HWIF(drive)->dmaproc(ide_dma_off_quietly, drive); |
| if ((HWIF(drive)->speedproc) != NULL) |
| HWIF(drive)->speedproc(drive, ide_auto_reduce_xfer(drive)); |
| if (drive->current_speed >= XFER_SW_DMA_0) |
| HWIF(drive)->dmaproc(ide_dma_on, drive); |
| } else |
| HWIF(drive)->dmaproc(ide_dma_off, drive); |
| } |
| } |
| |
| /* |
| * The capacity of a drive according to its current geometry/LBA settings in |
| * sectors. |
| */ |
| unsigned long ata_capacity(ide_drive_t *drive) |
| { |
| if (!drive->present || !drive->driver) |
| return 0; |
| |
| if (ata_ops(drive) && ata_ops(drive)->capacity) |
| return ata_ops(drive)->capacity(drive); |
| |
| /* FIXME: This magic number seems to be bogous. */ |
| return 0x7fffffff; |
| } |
| |
| /* |
| * This is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT commands to |
| * a drive. It used to do much more, but has been scaled back. |
| */ |
| static ide_startstop_t ata_special (ide_drive_t *drive) |
| { |
| special_t *s = &drive->special; |
| |
| #ifdef DEBUG |
| printk("%s: ata_special: 0x%02x\n", drive->name, s->all); |
| #endif |
| if (s->b.set_tune) { |
| ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc; |
| s->b.set_tune = 0; |
| if (tuneproc != NULL) |
| tuneproc(drive, drive->tune_req); |
| } else if (drive->driver != NULL) { |
| if (ata_ops(drive)->special) |
| return ata_ops(drive)->special(drive); |
| else { |
| drive->special.all = 0; |
| drive->mult_req = 0; |
| |
| return ide_stopped; |
| } |
| } else if (s->all) { |
| printk("%s: bad special flag: 0x%02x\n", drive->name, s->all); |
| s->all = 0; |
| } |
| |
| return ide_stopped; |
| } |
| |
| extern struct block_device_operations ide_fops[]; |
| |
| /* |
| * ide_geninit() is called exactly *once* for each interface. |
| */ |
| void ide_geninit (ide_hwif_t *hwif) |
| { |
| unsigned int unit; |
| struct gendisk *gd = hwif->gd; |
| |
| for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| ide_drive_t *drive = &hwif->drives[unit]; |
| |
| if (!drive->present) |
| continue; |
| if (drive->type != ATA_DISK && drive->type != ATA_FLOPPY) |
| continue; |
| register_disk(gd,mk_kdev(hwif->major,unit<<PARTN_BITS), |
| #ifdef CONFIG_BLK_DEV_ISAPNP |
| (drive->forced_geom && drive->noprobe) ? 1 : |
| #endif |
| 1 << PARTN_BITS, ide_fops, ata_capacity(drive)); |
| } |
| } |
| |
| static ide_startstop_t do_reset1 (ide_drive_t *, int); /* needed below */ |
| |
| /* |
| * ATAPI_reset_pollfunc() gets invoked to poll the interface for completion every 50ms |
| * during an ATAPI drive reset operation. If the drive has not yet responded, |
| * and we have not yet hit our maximum waiting time, then the timer is restarted |
| * for another 50ms. |
| */ |
| static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) |
| { |
| ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| byte stat; |
| |
| SELECT_DRIVE(HWIF(drive),drive); |
| udelay (10); |
| |
| if (OK_STAT(stat=GET_STAT(), 0, BUSY_STAT)) { |
| printk("%s: ATAPI reset complete\n", drive->name); |
| } else { |
| if (0 < (signed long)(hwgroup->poll_timeout - jiffies)) { |
| ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20, NULL); |
| return ide_started; /* continue polling */ |
| } |
| hwgroup->poll_timeout = 0; /* end of polling */ |
| printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive->name, stat); |
| return do_reset1 (drive, 1); /* do it the old fashioned way */ |
| } |
| hwgroup->poll_timeout = 0; /* done polling */ |
| return ide_stopped; |
| } |
| |
| /* |
| * reset_pollfunc() gets invoked to poll the interface for completion every 50ms |
| * during an ide reset operation. If the drives have not yet responded, |
| * and we have not yet hit our maximum waiting time, then the timer is restarted |
| * for another 50ms. |
| */ |
| static ide_startstop_t reset_pollfunc (ide_drive_t *drive) |
| { |
| ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| ide_hwif_t *hwif = HWIF(drive); |
| byte tmp; |
| |
| if (!OK_STAT(tmp=GET_STAT(), 0, BUSY_STAT)) { |
| if (0 < (signed long)(hwgroup->poll_timeout - jiffies)) { |
| ide_set_handler (drive, &reset_pollfunc, HZ/20, NULL); |
| return ide_started; /* continue polling */ |
| } |
| printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); |
| drive->failures++; |
| } else { |
| printk("%s: reset: ", hwif->name); |
| if ((tmp = GET_ERR()) == 1) { |
| printk("success\n"); |
| drive->failures = 0; |
| } else { |
| drive->failures++; |
| #if FANCY_STATUS_DUMPS |
| printk("master: "); |
| switch (tmp & 0x7f) { |
| case 1: printk("passed"); |
| break; |
| case 2: printk("formatter device error"); |
| break; |
| case 3: printk("sector buffer error"); |
| break; |
| case 4: printk("ECC circuitry error"); |
| break; |
| case 5: printk("controlling MPU error"); |
| break; |
| default:printk("error (0x%02x?)", tmp); |
| } |
| if (tmp & 0x80) |
| printk("; slave: failed"); |
| printk("\n"); |
| #else |
| printk("failed\n"); |
| #endif |
| } |
| } |
| hwgroup->poll_timeout = 0; /* done polling */ |
| return ide_stopped; |
| } |
| |
| /* |
| * do_reset1() attempts to recover a confused drive by resetting it. |
| * Unfortunately, resetting a disk drive actually resets all devices on |
| * the same interface, so it can really be thought of as resetting the |
| * interface rather than resetting the drive. |
| * |
| * ATAPI devices have their own reset mechanism which allows them to be |
| * individually reset without clobbering other devices on the same interface. |
| * |
| * Unfortunately, the IDE interface does not generate an interrupt to let |
| * us know when the reset operation has finished, so we must poll for this. |
| * Equally poor, though, is the fact that this may a very long time to complete, |
| * (up to 30 seconds worst case). So, instead of busy-waiting here for it, |
| * we set a timer to poll at 50ms intervals. |
| */ |
| static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) |
| { |
| unsigned int unit; |
| unsigned long flags; |
| ide_hwif_t *hwif = HWIF(drive); |
| ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| |
| __save_flags(flags); /* local CPU only */ |
| __cli(); /* local CPU only */ |
| |
| /* For an ATAPI device, first try an ATAPI SRST. */ |
| if (drive->type != ATA_DISK && !do_not_try_atapi) { |
| ata_pre_reset(drive); |
| SELECT_DRIVE(hwif,drive); |
| udelay (20); |
| OUT_BYTE (WIN_SRST, IDE_COMMAND_REG); |
| hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
| ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20, NULL); |
| __restore_flags (flags); /* local CPU only */ |
| return ide_started; |
| } |
| |
| /* |
| * First, reset any device state data we were maintaining |
| * for any of the drives on this interface. |
| */ |
| for (unit = 0; unit < MAX_DRIVES; ++unit) |
| ata_pre_reset(&hwif->drives[unit]); |
| |
| #if OK_TO_RESET_CONTROLLER |
| if (!IDE_CONTROL_REG) { |
| __restore_flags(flags); |
| return ide_stopped; |
| } |
| /* |
| * Note that we also set nIEN while resetting the device, |
| * to mask unwanted interrupts from the interface during the reset. |
| * However, due to the design of PC hardware, this will cause an |
| * immediate interrupt due to the edge transition it produces. |
| * This single interrupt gives us a "fast poll" for drives that |
| * recover from reset very quickly, saving us the first 50ms wait time. |
| */ |
| OUT_BYTE(drive->ctl|6,IDE_CONTROL_REG); /* set SRST and nIEN */ |
| udelay(10); /* more than enough time */ |
| if (drive->quirk_list == 2) { |
| OUT_BYTE(drive->ctl,IDE_CONTROL_REG); /* clear SRST and nIEN */ |
| } else { |
| OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* clear SRST, leave nIEN */ |
| } |
| udelay(10); /* more than enough time */ |
| hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
| ide_set_handler (drive, &reset_pollfunc, HZ/20, NULL); |
| |
| /* |
| * Some weird controller like resetting themselves to a strange |
| * state when the disks are reset this way. At least, the Winbond |
| * 553 documentation says that |
| */ |
| if (hwif->resetproc != NULL) |
| hwif->resetproc(drive); |
| |
| #endif |
| |
| __restore_flags (flags); /* local CPU only */ |
| return ide_started; |
| } |
| |
| /* |
| * ide_do_reset() is the entry point to the drive/interface reset code. |
| */ |
| ide_startstop_t ide_do_reset (ide_drive_t *drive) |
| { |
| return do_reset1 (drive, 0); |
| } |
| |
| static inline u32 read_24 (ide_drive_t *drive) |
| { |
| return (IN_BYTE(IDE_HCYL_REG)<<16) | |
| (IN_BYTE(IDE_LCYL_REG)<<8) | |
| IN_BYTE(IDE_SECTOR_REG); |
| } |
| |
| /* |
| * Clean up after success/failure of an explicit drive cmd |
| */ |
| void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err) |
| { |
| unsigned long flags; |
| struct request *rq; |
| |
| spin_lock_irqsave(&ide_lock, flags); |
| rq = HWGROUP(drive)->rq; |
| |
| if (rq->flags & REQ_DRIVE_CMD) { |
| byte *args = (byte *) rq->buffer; |
| rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT); |
| if (args) { |
| args[0] = stat; |
| args[1] = err; |
| args[2] = IN_BYTE(IDE_NSECTOR_REG); |
| } |
| } else if (rq->flags & REQ_DRIVE_TASK) { |
| byte *args = (byte *) rq->buffer; |
| rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT); |
| if (args) { |
| args[0] = stat; |
| args[1] = err; |
| args[2] = IN_BYTE(IDE_NSECTOR_REG); |
| args[3] = IN_BYTE(IDE_SECTOR_REG); |
| args[4] = IN_BYTE(IDE_LCYL_REG); |
| args[5] = IN_BYTE(IDE_HCYL_REG); |
| args[6] = IN_BYTE(IDE_SELECT_REG); |
| } |
| } else if (rq->flags & REQ_DRIVE_TASKFILE) { |
| ide_task_t *args = (ide_task_t *) rq->special; |
| rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT); |
| if (args) { |
| if (args->tf_in_flags.b.data) { |
| unsigned short data = IN_WORD(IDE_DATA_REG); |
| args->tfRegister[IDE_DATA_OFFSET] = (data) & 0xFF; |
| args->hobRegister[IDE_DATA_OFFSET_HOB] = (data >> 8) & 0xFF; |
| } |
| args->tfRegister[IDE_ERROR_OFFSET] = err; |
| args->tfRegister[IDE_NSECTOR_OFFSET] = IN_BYTE(IDE_NSECTOR_REG); |
| args->tfRegister[IDE_SECTOR_OFFSET] = IN_BYTE(IDE_SECTOR_REG); |
| args->tfRegister[IDE_LCYL_OFFSET] = IN_BYTE(IDE_LCYL_REG); |
| args->tfRegister[IDE_HCYL_OFFSET] = IN_BYTE(IDE_HCYL_REG); |
| args->tfRegister[IDE_SELECT_OFFSET] = IN_BYTE(IDE_SELECT_REG); |
| args->tfRegister[IDE_STATUS_OFFSET] = stat; |
| if ((drive->id->command_set_2 & 0x0400) && |
| (drive->id->cfs_enable_2 & 0x0400) && |
| (drive->addressing == 1)) { |
| OUT_BYTE(drive->ctl|0x80, IDE_CONTROL_REG_HOB); |
| args->hobRegister[IDE_FEATURE_OFFSET_HOB] = IN_BYTE(IDE_FEATURE_REG); |
| args->hobRegister[IDE_NSECTOR_OFFSET_HOB] = IN_BYTE(IDE_NSECTOR_REG); |
| args->hobRegister[IDE_SECTOR_OFFSET_HOB] = IN_BYTE(IDE_SECTOR_REG); |
| args->hobRegister[IDE_LCYL_OFFSET_HOB] = IN_BYTE(IDE_LCYL_REG); |
| args->hobRegister[IDE_HCYL_OFFSET_HOB] = IN_BYTE(IDE_HCYL_REG); |
| } |
| } |
| } |
| |
| blkdev_dequeue_request(rq); |
| HWGROUP(drive)->rq = NULL; |
| end_that_request_last(rq); |
| |
| spin_unlock_irqrestore(&ide_lock, flags); |
| } |
| |
| /* |
| * Error reporting, in human readable form (luxurious, but a memory hog). |
| */ |
| byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat) |
| { |
| unsigned long flags; |
| byte err = 0; |
| |
| __save_flags (flags); /* local CPU only */ |
| ide__sti(); /* local CPU only */ |
| printk("%s: %s: status=0x%02x", drive->name, msg, stat); |
| #if FANCY_STATUS_DUMPS |
| printk(" { "); |
| if (stat & BUSY_STAT) |
| printk("Busy "); |
| else { |
| if (stat & READY_STAT) printk("DriveReady "); |
| if (stat & WRERR_STAT) printk("DeviceFault "); |
| if (stat & SEEK_STAT) printk("SeekComplete "); |
| if (stat & DRQ_STAT) printk("DataRequest "); |
| if (stat & ECC_STAT) printk("CorrectedError "); |
| if (stat & INDEX_STAT) printk("Index "); |
| if (stat & ERR_STAT) printk("Error "); |
| } |
| printk("}"); |
| #endif /* FANCY_STATUS_DUMPS */ |
| printk("\n"); |
| if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) { |
| err = GET_ERR(); |
| printk("%s: %s: error=0x%02x", drive->name, msg, err); |
| #if FANCY_STATUS_DUMPS |
| if (drive->type == ATA_DISK) { |
| printk(" { "); |
| if (err & ABRT_ERR) printk("DriveStatusError "); |
| if (err & ICRC_ERR) printk("%s", (err & ABRT_ERR) ? "BadCRC " : "BadSector "); |
| if (err & ECC_ERR) printk("UncorrectableError "); |
| if (err & ID_ERR) printk("SectorIdNotFound "); |
| if (err & TRK0_ERR) printk("TrackZeroNotFound "); |
| if (err & MARK_ERR) printk("AddrMarkNotFound "); |
| printk("}"); |
| if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR || (err & (ECC_ERR|ID_ERR|MARK_ERR))) { |
| if ((drive->id->command_set_2 & 0x0400) && |
| (drive->id->cfs_enable_2 & 0x0400) && |
| (drive->addressing == 1)) { |
| __u64 sectors = 0; |
| u32 low = 0, high = 0; |
| low = read_24(drive); |
| OUT_BYTE(drive->ctl|0x80, IDE_CONTROL_REG); |
| high = read_24(drive); |
| |
| sectors = ((__u64)high << 24) | low; |
| printk(", LBAsect=%lld, high=%d, low=%d", (long long) sectors, high, low); |
| } else { |
| byte cur = IN_BYTE(IDE_SELECT_REG); |
| if (cur & 0x40) { /* using LBA? */ |
| printk(", LBAsect=%ld", (unsigned long) |
| ((cur&0xf)<<24) |
| |(IN_BYTE(IDE_HCYL_REG)<<16) |
| |(IN_BYTE(IDE_LCYL_REG)<<8) |
| | IN_BYTE(IDE_SECTOR_REG)); |
| } else { |
| printk(", CHS=%d/%d/%d", |
| (IN_BYTE(IDE_HCYL_REG)<<8) + |
| IN_BYTE(IDE_LCYL_REG), |
| cur & 0xf, |
| IN_BYTE(IDE_SECTOR_REG)); |
| } |
| } |
| if (HWGROUP(drive) && HWGROUP(drive)->rq) |
| printk(", sector=%ld", HWGROUP(drive)->rq->sector); |
| } |
| } |
| #endif /* FANCY_STATUS_DUMPS */ |
| printk("\n"); |
| } |
| __restore_flags (flags); /* local CPU only */ |
| return err; |
| } |
| |
| /* |
| * try_to_flush_leftover_data() is invoked in response to a drive |
| * unexpectedly having its DRQ_STAT bit set. As an alternative to |
| * resetting the drive, this routine tries to clear the condition |
| * by read a sector's worth of data from the drive. Of course, |
| * this may not help if the drive is *waiting* for data from *us*. |
| */ |
| static void try_to_flush_leftover_data (ide_drive_t *drive) |
| { |
| int i = (drive->mult_count ? drive->mult_count : 1) * SECTOR_WORDS; |
| |
| if (drive->type != ATA_DISK) |
| return; |
| while (i > 0) { |
| u32 buffer[16]; |
| unsigned int wcount = (i > 16) ? 16 : i; |
| i -= wcount; |
| ata_input_data (drive, buffer, wcount); |
| } |
| } |
| |
| /* |
| * ide_error() takes action based on the error returned by the drive. |
| */ |
| ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat) |
| { |
| struct request *rq; |
| byte err; |
| |
| err = ide_dump_status(drive, msg, stat); |
| if (drive == NULL || (rq = HWGROUP(drive)->rq) == NULL) |
| return ide_stopped; |
| /* retry only "normal" I/O: */ |
| if (!(rq->flags & REQ_CMD)) { |
| rq->errors = 1; |
| ide_end_drive_cmd(drive, stat, err); |
| return ide_stopped; |
| } |
| |
| if (stat & BUSY_STAT || ((stat & WRERR_STAT) && !drive->nowerr)) { /* other bits are useless when BUSY */ |
| rq->errors |= ERROR_RESET; |
| } else { |
| if (drive->type == ATA_DISK && (stat & ERR_STAT)) { |
| /* err has different meaning on cdrom and tape */ |
| if (err == ABRT_ERR) { |
| if (drive->select.b.lba && IN_BYTE(IDE_COMMAND_REG) == WIN_SPECIFY) |
| return ide_stopped; /* some newer drives don't support WIN_SPECIFY */ |
| } else if ((err & (ABRT_ERR | ICRC_ERR)) == (ABRT_ERR | ICRC_ERR)) { |
| drive->crc_count++; /* UDMA crc error -- just retry the operation */ |
| } else if (err & (BBD_ERR | ECC_ERR)) /* retries won't help these */ |
| rq->errors = ERROR_MAX; |
| else if (err & TRK0_ERR) /* help it find track zero */ |
| rq->errors |= ERROR_RECAL; |
| } |
| /* pre bio (rq->cmd != WRITE) */ |
| if ((stat & DRQ_STAT) && rq_data_dir(rq) == READ) |
| try_to_flush_leftover_data(drive); |
| } |
| if (GET_STAT() & (BUSY_STAT|DRQ_STAT)) |
| OUT_BYTE(WIN_IDLEIMMEDIATE,IDE_COMMAND_REG); /* force an abort */ |
| |
| if (rq->errors >= ERROR_MAX) { |
| /* ATA-PATTERN */ |
| if (ata_ops(drive) && ata_ops(drive)->end_request) |
| ata_ops(drive)->end_request(drive, 0); |
| else |
| ide_end_request(drive, 0); |
| } else { |
| if ((rq->errors & ERROR_RESET) == ERROR_RESET) { |
| ++rq->errors; |
| return ide_do_reset(drive); |
| } |
| if ((rq->errors & ERROR_RECAL) == ERROR_RECAL) |
| drive->special.b.recalibrate = 1; |
| ++rq->errors; |
| } |
| return ide_stopped; |
| } |
| |
| /* |
| * Issue a simple drive command |
| * The drive must be selected beforehand. |
| */ |
| void ide_cmd (ide_drive_t *drive, byte cmd, byte nsect, ide_handler_t *handler) |
| { |
| ide_set_handler (drive, handler, WAIT_CMD, NULL); |
| if (IDE_CONTROL_REG) |
| OUT_BYTE(drive->ctl,IDE_CONTROL_REG); /* clear nIEN */ |
| SELECT_MASK(HWIF(drive),drive,0); |
| OUT_BYTE(nsect,IDE_NSECTOR_REG); |
| OUT_BYTE(cmd,IDE_COMMAND_REG); |
| } |
| |
| /* |
| * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD. |
| */ |
| static ide_startstop_t drive_cmd_intr (ide_drive_t *drive) |
| { |
| struct request *rq = HWGROUP(drive)->rq; |
| byte *args = (byte *) rq->buffer; |
| byte stat = GET_STAT(); |
| int retries = 10; |
| |
| ide__sti(); /* local CPU only */ |
| if ((stat & DRQ_STAT) && args && args[3]) { |
| byte io_32bit = drive->io_32bit; |
| drive->io_32bit = 0; |
| ata_input_data(drive, &args[4], args[3] * SECTOR_WORDS); |
| drive->io_32bit = io_32bit; |
| while (((stat = GET_STAT()) & BUSY_STAT) && retries--) |
| udelay(100); |
| } |
| |
| if (!OK_STAT(stat, READY_STAT, BAD_STAT)) |
| return ide_error(drive, "drive_cmd", stat); /* calls ide_end_drive_cmd */ |
| ide_end_drive_cmd (drive, stat, GET_ERR()); |
| return ide_stopped; |
| } |
| |
| /* |
| * This routine busy-waits for the drive status to be not "busy". |
| * It then checks the status for all of the "good" bits and none |
| * of the "bad" bits, and if all is okay it returns 0. All other |
| * cases return 1 after invoking ide_error() -- caller should just return. |
| * |
| * This routine should get fixed to not hog the cpu during extra long waits.. |
| * That could be done by busy-waiting for the first jiffy or two, and then |
| * setting a timer to wake up at half second intervals thereafter, |
| * until timeout is achieved, before timing out. |
| */ |
| int ide_wait_stat (ide_startstop_t *startstop, ide_drive_t *drive, byte good, byte bad, unsigned long timeout) { |
| byte stat; |
| int i; |
| unsigned long flags; |
| |
| /* bail early if we've exceeded max_failures */ |
| if (drive->max_failures && (drive->failures > drive->max_failures)) { |
| *startstop = ide_stopped; |
| return 1; |
| } |
| |
| udelay(1); /* spec allows drive 400ns to assert "BUSY" */ |
| if ((stat = GET_STAT()) & BUSY_STAT) { |
| __save_flags(flags); /* local CPU only */ |
| ide__sti(); /* local CPU only */ |
| timeout += jiffies; |
| while ((stat = GET_STAT()) & BUSY_STAT) { |
| if (0 < (signed long)(jiffies - timeout)) { |
| __restore_flags(flags); /* local CPU only */ |
| *startstop = ide_error(drive, "status timeout", stat); |
| return 1; |
| } |
| } |
| __restore_flags(flags); /* local CPU only */ |
| } |
| /* |
| * Allow status to settle, then read it again. |
| * A few rare drives vastly violate the 400ns spec here, |
| * so we'll wait up to 10usec for a "good" status |
| * rather than expensively fail things immediately. |
| * This fix courtesy of Matthew Faupel & Niccolo Rigacci. |
| */ |
| for (i = 0; i < 10; i++) { |
| udelay(1); |
| if (OK_STAT((stat = GET_STAT()), good, bad)) |
| return 0; |
| } |
| *startstop = ide_error(drive, "status error", stat); |
| return 1; |
| } |
| |
| /* |
| * execute_drive_cmd() issues a special drive command, |
| * usually initiated by ioctl() from the external hdparm program. |
| */ |
| static ide_startstop_t execute_drive_cmd (ide_drive_t *drive, struct request *rq) |
| { |
| if (rq->flags & REQ_DRIVE_TASKFILE) { |
| ide_task_t *args = rq->special; |
| |
| if (!(args)) |
| goto args_error; |
| |
| do_taskfile(drive, |
| (struct hd_drive_task_hdr *)&args->tfRegister, |
| (struct hd_drive_hob_hdr *)&args->hobRegister, |
| args->handler); |
| |
| if (((args->command_type == IDE_DRIVE_TASK_RAW_WRITE) || |
| (args->command_type == IDE_DRIVE_TASK_OUT)) && |
| args->prehandler && args->handler) |
| return args->prehandler(drive, rq); |
| return ide_started; |
| |
| } else if (rq->flags & REQ_DRIVE_TASK) { |
| byte *args = rq->buffer; |
| byte sel; |
| |
| if (!(args)) goto args_error; |
| #ifdef DEBUG |
| printk("%s: DRIVE_TASK_CMD ", drive->name); |
| printk("cmd=0x%02x ", args[0]); |
| printk("fr=0x%02x ", args[1]); |
| printk("ns=0x%02x ", args[2]); |
| printk("sc=0x%02x ", args[3]); |
| printk("lcyl=0x%02x ", args[4]); |
| printk("hcyl=0x%02x ", args[5]); |
| printk("sel=0x%02x\n", args[6]); |
| #endif |
| OUT_BYTE(args[1], IDE_FEATURE_REG); |
| OUT_BYTE(args[3], IDE_SECTOR_REG); |
| OUT_BYTE(args[4], IDE_LCYL_REG); |
| OUT_BYTE(args[5], IDE_HCYL_REG); |
| sel = (args[6] & ~0x10); |
| if (drive->select.b.unit) |
| sel |= 0x10; |
| OUT_BYTE(sel, IDE_SELECT_REG); |
| ide_cmd(drive, args[0], args[2], &drive_cmd_intr); |
| return ide_started; |
| } else if (rq->flags & REQ_DRIVE_CMD) { |
| |
| byte *args = rq->buffer; |
| if (!(args)) goto args_error; |
| #ifdef DEBUG |
| printk("%s: DRIVE_CMD ", drive->name); |
| printk("cmd=0x%02x ", args[0]); |
| printk("sc=0x%02x ", args[1]); |
| printk("fr=0x%02x ", args[2]); |
| printk("xx=0x%02x\n", args[3]); |
| #endif |
| if (args[0] == WIN_SMART) { |
| OUT_BYTE(0x4f, IDE_LCYL_REG); |
| OUT_BYTE(0xc2, IDE_HCYL_REG); |
| OUT_BYTE(args[2],IDE_FEATURE_REG); |
| OUT_BYTE(args[1],IDE_SECTOR_REG); |
| ide_cmd(drive, args[0], args[3], &drive_cmd_intr); |
| return ide_started; |
| } |
| OUT_BYTE(args[2],IDE_FEATURE_REG); |
| ide_cmd(drive, args[0], args[1], &drive_cmd_intr); |
| return ide_started; |
| } |
| |
| args_error: |
| /* |
| * NULL is actually a valid way of waiting for |
| * all current requests to be flushed from the queue. |
| */ |
| #ifdef DEBUG |
| printk("%s: DRIVE_CMD (null)\n", drive->name); |
| #endif |
| ide_end_drive_cmd(drive, GET_STAT(), GET_ERR()); |
| return ide_stopped; |
| } |
| |
| /* |
| * start_request() initiates handling of a new I/O request |
| */ |
| static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq) |
| { |
| ide_startstop_t startstop; |
| unsigned long block; |
| unsigned int minor = minor(rq->rq_dev), unit = minor >> PARTN_BITS; |
| ide_hwif_t *hwif = HWIF(drive); |
| |
| BUG_ON(!(rq->flags & REQ_STARTED)); |
| |
| #ifdef DEBUG |
| printk("%s: start_request: current=0x%08lx\n", hwif->name, (unsigned long) rq); |
| #endif |
| |
| /* bail early if we've exceeded max_failures */ |
| if (drive->max_failures && (drive->failures > drive->max_failures)) { |
| goto kill_rq; |
| } |
| |
| if (unit >= MAX_DRIVES) { |
| printk("%s: bad device number: %s\n", hwif->name, kdevname(rq->rq_dev)); |
| goto kill_rq; |
| } |
| block = rq->sector; |
| |
| /* Strange disk manager remap */ |
| if ((rq->flags & REQ_CMD) && |
| (drive->type == ATA_DISK || drive->type == ATA_FLOPPY)) { |
| block += drive->sect0; |
| } |
| /* Yecch - this will shift the entire interval, |
| possibly killing some innocent following sector */ |
| if (block == 0 && drive->remap_0_to_1 == 1) |
| block = 1; /* redirect MBR access to EZ-Drive partn table */ |
| |
| #if (DISK_RECOVERY_TIME > 0) |
| while ((read_timer() - hwif->last_time) < DISK_RECOVERY_TIME); |
| #endif |
| |
| SELECT_DRIVE(hwif, drive); |
| if (ide_wait_stat(&startstop, drive, drive->ready_stat, |
| BUSY_STAT|DRQ_STAT, WAIT_READY)) { |
| printk(KERN_WARNING "%s: drive not ready for command\n", drive->name); |
| return startstop; |
| } |
| if (!drive->special.all) { |
| if (rq->flags & (REQ_DRIVE_CMD | REQ_DRIVE_TASK | REQ_DRIVE_TASKFILE)) |
| return execute_drive_cmd(drive, rq); |
| |
| if (ata_ops(drive)) { |
| if (ata_ops(drive)->do_request) |
| return ata_ops(drive)->do_request(drive, rq, block); |
| else { |
| ide_end_request(drive, 0); |
| return ide_stopped; |
| } |
| } |
| printk(KERN_WARNING "%s: device type %d not supported\n", |
| drive->name, drive->type); |
| goto kill_rq; |
| } |
| return ata_special(drive); |
| kill_rq: |
| if (ata_ops(drive) && ata_ops(drive)->end_request) |
| ata_ops(drive)->end_request(drive, 0); |
| else |
| ide_end_request(drive, 0); |
| return ide_stopped; |
| } |
| |
| ide_startstop_t restart_request (ide_drive_t *drive) |
| { |
| ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| unsigned long flags; |
| struct request *rq; |
| |
| spin_lock_irqsave(&ide_lock, flags); |
| hwgroup->handler = NULL; |
| del_timer(&hwgroup->timer); |
| rq = hwgroup->rq; |
| spin_unlock_irqrestore(&ide_lock, flags); |
| |
| return start_request(drive, rq); |
| } |
| |
| /* |
| * ide_stall_queue() can be used by a drive to give excess bandwidth back |
| * to the hwgroup by sleeping for timeout jiffies. |
| */ |
| void ide_stall_queue (ide_drive_t *drive, unsigned long timeout) |
| { |
| if (timeout > WAIT_WORSTCASE) |
| timeout = WAIT_WORSTCASE; |
| drive->sleep = timeout + jiffies; |
| } |
| |
| #define WAKEUP(drive) ((drive)->service_start + 2 * (drive)->service_time) |
| |
| /* |
| * choose_drive() selects the next drive which will be serviced. |
| */ |
| static inline ide_drive_t *choose_drive (ide_hwgroup_t *hwgroup) |
| { |
| ide_drive_t *drive, *best; |
| |
| repeat: |
| best = NULL; |
| drive = hwgroup->drive; |
| do { |
| if (!list_empty(&drive->queue.queue_head) && (!drive->sleep || 0 <= (signed long)(jiffies - drive->sleep))) { |
| if (!best |
| || (drive->sleep && (!best->sleep || 0 < (signed long)(best->sleep - drive->sleep))) |
| || (!best->sleep && 0 < (signed long)(WAKEUP(best) - WAKEUP(drive)))) |
| { |
| if (!blk_queue_plugged(&drive->queue)) |
| best = drive; |
| } |
| } |
| } while ((drive = drive->next) != hwgroup->drive); |
| if (best && best->nice1 && !best->sleep && best != hwgroup->drive && best->service_time > WAIT_MIN_SLEEP) { |
| long t = (signed long)(WAKEUP(best) - jiffies); |
| if (t >= WAIT_MIN_SLEEP) { |
| /* |
| * We *may* have some time to spare, but first let's see if |
| * someone can potentially benefit from our nice mood today.. |
| */ |
| drive = best->next; |
| do { |
| if (!drive->sleep |
| && 0 < (signed long)(WAKEUP(drive) - (jiffies - best->service_time)) |
| && 0 < (signed long)((jiffies + t) - WAKEUP(drive))) |
| { |
| ide_stall_queue(best, min(t, 10 * WAIT_MIN_SLEEP)); |
| goto repeat; |
| } |
| } while ((drive = drive->next) != best); |
| } |
| } |
| return best; |
| } |
| |
| /* |
| * Issue a new request to a drive from hwgroup |
| * Caller must have already done spin_lock_irqsave(&ide_lock, ...) |
| * |
| * A hwgroup is a serialized group of IDE interfaces. Usually there is |
| * exactly one hwif (interface) per hwgroup, but buggy controllers (eg. CMD640) |
| * may have both interfaces in a single hwgroup to "serialize" access. |
| * Or possibly multiple ISA interfaces can share a common IRQ by being grouped |
| * together into one hwgroup for serialized access. |
| * |
| * Note also that several hwgroups can end up sharing a single IRQ, |
| * possibly along with many other devices. This is especially common in |
| * PCI-based systems with off-board IDE controller cards. |
| * |
| * The IDE driver uses the queue spinlock to protect access to the request |
| * queues. |
| * |
| * The first thread into the driver for a particular hwgroup sets the |
| * hwgroup->flags IDE_BUSY flag to indicate that this hwgroup is now active, |
| * and then initiates processing of the top request from the request queue. |
| * |
| * Other threads attempting entry notice the busy setting, and will simply |
| * queue their new requests and exit immediately. Note that hwgroup->flags |
| * remains busy even when the driver is merely awaiting the next interrupt. |
| * Thus, the meaning is "this hwgroup is busy processing a request". |
| * |
| * When processing of a request completes, the completing thread or IRQ-handler |
| * will start the next request from the queue. If no more work remains, |
| * the driver will clear the hwgroup->flags IDE_BUSY flag and exit. |
| */ |
| static void ide_do_request(ide_hwgroup_t *hwgroup, int masked_irq) |
| { |
| ide_drive_t *drive; |
| ide_hwif_t *hwif; |
| ide_startstop_t startstop; |
| struct request *rq; |
| |
| ide_get_lock(&ide_intr_lock, ide_intr, hwgroup);/* for atari only: POSSIBLY BROKEN HERE(?) */ |
| |
| __cli(); /* necessary paranoia: ensure IRQs are masked on local CPU */ |
| |
| while (!test_and_set_bit(IDE_BUSY, &hwgroup->flags)) { |
| drive = choose_drive(hwgroup); |
| if (drive == NULL) { |
| unsigned long sleep = 0; |
| hwgroup->rq = NULL; |
| drive = hwgroup->drive; |
| do { |
| if (drive->sleep && (!sleep || 0 < (signed long)(sleep - drive->sleep))) |
| sleep = drive->sleep; |
| } while ((drive = drive->next) != hwgroup->drive); |
| if (sleep) { |
| /* |
| * Take a short snooze, and then wake up this hwgroup again. |
| * This gives other hwgroups on the same a chance to |
| * play fairly with us, just in case there are big differences |
| * in relative throughputs.. don't want to hog the cpu too much. |
| */ |
| if (0 < (signed long)(jiffies + WAIT_MIN_SLEEP - sleep)) |
| sleep = jiffies + WAIT_MIN_SLEEP; |
| #if 1 |
| if (timer_pending(&hwgroup->timer)) |
| printk("ide_set_handler: timer already active\n"); |
| #endif |
| set_bit(IDE_SLEEP, &hwgroup->flags); |
| mod_timer(&hwgroup->timer, sleep); |
| /* we purposely leave hwgroup busy while sleeping */ |
| } else { |
| /* Ugly, but how can we sleep for the lock otherwise? perhaps from tq_disk? */ |
| ide_release_lock(&ide_intr_lock);/* for atari only */ |
| clear_bit(IDE_BUSY, &hwgroup->flags); |
| } |
| return; /* no more work for this hwgroup (for now) */ |
| } |
| hwif = HWIF(drive); |
| if (hwgroup->hwif->sharing_irq && hwif != hwgroup->hwif && hwif->io_ports[IDE_CONTROL_OFFSET]) { |
| /* set nIEN for previous hwif */ |
| |
| if (hwif->intrproc) |
| hwif->intrproc(drive); |
| else |
| OUT_BYTE((drive)->ctl|2, hwif->io_ports[IDE_CONTROL_OFFSET]); |
| } |
| hwgroup->hwif = hwif; |
| hwgroup->drive = drive; |
| drive->sleep = 0; |
| drive->service_start = jiffies; |
| |
| if (blk_queue_plugged(&drive->queue)) |
| BUG(); |
| |
| /* |
| * just continuing an interrupted request maybe |
| */ |
| rq = hwgroup->rq = elv_next_request(&drive->queue); |
| |
| /* |
| * Some systems have trouble with IDE IRQs arriving while |
| * the driver is still setting things up. So, here we disable |
| * the IRQ used by this interface while the request is being started. |
| * This may look bad at first, but pretty much the same thing |
| * happens anyway when any interrupt comes in, IDE or otherwise |
| * -- the kernel masks the IRQ while it is being handled. |
| */ |
| if (masked_irq && hwif->irq != masked_irq) |
| disable_irq_nosync(hwif->irq); |
| spin_unlock(&ide_lock); |
| ide__sti(); /* allow other IRQs while we start this request */ |
| startstop = start_request(drive, rq); |
| spin_lock_irq(&ide_lock); |
| if (masked_irq && hwif->irq != masked_irq) |
| enable_irq(hwif->irq); |
| if (startstop == ide_stopped) |
| clear_bit(IDE_BUSY, &hwgroup->flags); |
| } |
| } |
| |
| /* |
| * Returns the queue which corresponds to a given device. |
| */ |
| request_queue_t *ide_get_queue (kdev_t dev) |
| { |
| ide_hwif_t *hwif = (ide_hwif_t *)blk_dev[major(dev)].data; |
| |
| return &hwif->drives[DEVICE_NR(dev) & 1].queue; |
| } |
| |
| /* |
| * Passes the stuff to ide_do_request |
| */ |
| void do_ide_request(request_queue_t *q) |
| { |
| ide_do_request(q->queuedata, 0); |
| } |
| |
| /* |
| * un-busy the hwgroup etc, and clear any pending DMA status. we want to |
| * retry the current request in PIO mode instead of risking tossing it |
| * all away |
| */ |
| void ide_dma_timeout_retry(ide_drive_t *drive) |
| { |
| ide_hwif_t *hwif = HWIF(drive); |
| struct request *rq; |
| |
| /* |
| * end current dma transaction |
| */ |
| hwif->dmaproc(ide_dma_end, drive); |
| |
| /* |
| * complain a little, later we might remove some of this verbosity |
| */ |
| printk("%s: timeout waiting for DMA\n", drive->name); |
| hwif->dmaproc(ide_dma_timeout, drive); |
| |
| /* |
| * disable dma for now, but remember that we did so because of |
| * a timeout -- we'll reenable after we finish this next request |
| * (or rather the first chunk of it) in pio. |
| */ |
| drive->retry_pio++; |
| drive->state = DMA_PIO_RETRY; |
| hwif->dmaproc(ide_dma_off_quietly, drive); |
| |
| /* |
| * un-busy drive etc (hwgroup->busy is cleared on return) and |
| * make sure request is sane |
| */ |
| rq = HWGROUP(drive)->rq; |
| HWGROUP(drive)->rq = NULL; |
| |
| rq->errors = 0; |
| if (rq->bio) { |
| rq->sector = rq->bio->bi_sector; |
| rq->current_nr_sectors = bio_iovec(rq->bio)->bv_len >> 9; |
| rq->buffer = NULL; |
| } |
| } |
| |
| /* |
| * ide_timer_expiry() is our timeout function for all drive operations. |
| * But note that it can also be invoked as a result of a "sleep" operation |
| * triggered by the mod_timer() call in ide_do_request. |
| */ |
| void ide_timer_expiry (unsigned long data) |
| { |
| ide_hwgroup_t *hwgroup = (ide_hwgroup_t *) data; |
| ide_handler_t *handler; |
| ide_expiry_t *expiry; |
| unsigned long flags; |
| unsigned long wait; |
| |
| /* |
| * a global lock protects timers etc -- shouldn't get contention |
| * worth mentioning |
| */ |
| spin_lock_irqsave(&ide_lock, flags); |
| del_timer(&hwgroup->timer); |
| |
| if ((handler = hwgroup->handler) == NULL) { |
| /* |
| * Either a marginal timeout occurred |
| * (got the interrupt just as timer expired), |
| * or we were "sleeping" to give other devices a chance. |
| * Either way, we don't really want to complain about anything. |
| */ |
| if (test_and_clear_bit(IDE_SLEEP, &hwgroup->flags)) |
| clear_bit(IDE_BUSY, &hwgroup->flags); |
| } else { |
| ide_drive_t *drive = hwgroup->drive; |
| if (!drive) { |
| printk("ide_timer_expiry: hwgroup->drive was NULL\n"); |
| hwgroup->handler = NULL; |
| } else { |
| ide_hwif_t *hwif; |
| ide_startstop_t startstop; |
| /* paranoia */ |
| if (!test_and_set_bit(IDE_BUSY, &hwgroup->flags)) |
| printk("%s: ide_timer_expiry: hwgroup was not busy??\n", drive->name); |
| if ((expiry = hwgroup->expiry) != NULL) { |
| /* continue */ |
| if ((wait = expiry(drive)) != 0) { |
| /* reset timer */ |
| hwgroup->timer.expires = jiffies + wait; |
| add_timer(&hwgroup->timer); |
| spin_unlock_irqrestore(&ide_lock, flags); |
| return; |
| } |
| } |
| hwgroup->handler = NULL; |
| /* |
| * We need to simulate a real interrupt when invoking |
| * the handler() function, which means we need to globally |
| * mask the specific IRQ: |
| */ |
| spin_unlock(&ide_lock); |
| hwif = HWIF(drive); |
| #if DISABLE_IRQ_NOSYNC |
| disable_irq_nosync(hwif->irq); |
| #else |
| disable_irq(hwif->irq); /* disable_irq_nosync ?? */ |
| #endif /* DISABLE_IRQ_NOSYNC */ |
| __cli(); /* local CPU only, as if we were handling an interrupt */ |
| if (hwgroup->poll_timeout != 0) { |
| startstop = handler(drive); |
| } else if (drive_is_ready(drive)) { |
| if (drive->waiting_for_dma) |
| (void) hwgroup->hwif->dmaproc(ide_dma_lostirq, drive); |
| (void)ide_ack_intr(hwif); |
| printk("%s: lost interrupt\n", drive->name); |
| startstop = handler(drive); |
| } else { |
| if (drive->waiting_for_dma) { |
| startstop = ide_stopped; |
| ide_dma_timeout_retry(drive); |
| } else |
| startstop = ide_error(drive, "irq timeout", GET_STAT()); |
| } |
| set_recovery_timer(hwif); |
| drive->service_time = jiffies - drive->service_start; |
| enable_irq(hwif->irq); |
| spin_lock_irq(&ide_lock); |
| if (startstop == ide_stopped) |
| clear_bit(IDE_BUSY, &hwgroup->flags); |
| } |
| } |
| ide_do_request(hwgroup, 0); |
| spin_unlock_irqrestore(&ide_lock, flags); |
| } |
| |
| /* |
| * There's nothing really useful we can do with an unexpected interrupt, |
| * other than reading the status register (to clear it), and logging it. |
| * There should be no way that an irq can happen before we're ready for it, |
| * so we needn't worry much about losing an "important" interrupt here. |
| * |
| * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the |
| * drive enters "idle", "standby", or "sleep" mode, so if the status looks |
| * "good", we just ignore the interrupt completely. |
| * |
| * This routine assumes __cli() is in effect when called. |
| * |
| * If an unexpected interrupt happens on irq15 while we are handling irq14 |
| * and if the two interfaces are "serialized" (CMD640), then it looks like |
| * we could screw up by interfering with a new request being set up for irq15. |
| * |
| * In reality, this is a non-issue. The new command is not sent unless the |
| * drive is ready to accept one, in which case we know the drive is not |
| * trying to interrupt us. And ide_set_handler() is always invoked before |
| * completing the issuance of any new drive command, so we will not be |
| * accidentally invoked as a result of any valid command completion interrupt. |
| * |
| */ |
| static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup) |
| { |
| byte stat; |
| ide_hwif_t *hwif = hwgroup->hwif; |
| |
| /* |
| * handle the unexpected interrupt |
| */ |
| do { |
| if (hwif->irq == irq) { |
| stat = IN_BYTE(hwif->io_ports[IDE_STATUS_OFFSET]); |
| if (!OK_STAT(stat, READY_STAT, BAD_STAT)) { |
| /* Try to not flood the console with msgs */ |
| static unsigned long last_msgtime, count; |
| ++count; |
| if (0 < (signed long)(jiffies - (last_msgtime + HZ))) { |
| last_msgtime = jiffies; |
| printk("%s%s: unexpected interrupt, status=0x%02x, count=%ld\n", |
| hwif->name, (hwif->next == hwgroup->hwif) ? "" : "(?)", stat, count); |
| } |
| } |
| } |
| } while ((hwif = hwif->next) != hwgroup->hwif); |
| } |
| |
| /* |
| * entry point for all interrupts, caller does __cli() for us |
| */ |
| void ide_intr (int irq, void *dev_id, struct pt_regs *regs) |
| { |
| unsigned long flags; |
| ide_hwgroup_t *hwgroup = (ide_hwgroup_t *)dev_id; |
| ide_hwif_t *hwif; |
| ide_drive_t *drive; |
| ide_handler_t *handler; |
| ide_startstop_t startstop; |
| |
| spin_lock_irqsave(&ide_lock, flags); |
| hwif = hwgroup->hwif; |
| |
| if (!ide_ack_intr(hwif)) |
| goto out_lock; |
| |
| if ((handler = hwgroup->handler) == NULL || hwgroup->poll_timeout != 0) { |
| /* |
| * Not expecting an interrupt from this drive. |
| * That means this could be: |
| * (1) an interrupt from another PCI device |
| * sharing the same PCI INT# as us. |
| * or (2) a drive just entered sleep or standby mode, |
| * and is interrupting to let us know. |
| * or (3) a spurious interrupt of unknown origin. |
| * |
| * For PCI, we cannot tell the difference, |
| * so in that case we just ignore it and hope it goes away. |
| */ |
| #ifdef CONFIG_BLK_DEV_IDEPCI |
| if (hwif->pci_dev && !hwif->pci_dev->vendor) |
| #endif |
| { |
| /* |
| * Probably not a shared PCI interrupt, |
| * so we can safely try to do something about it: |
| */ |
| unexpected_intr(irq, hwgroup); |
| #ifdef CONFIG_BLK_DEV_IDEPCI |
| } else { |
| /* |
| * Whack the status register, just in case we have a leftover pending IRQ. |
| */ |
| IN_BYTE(hwif->io_ports[IDE_STATUS_OFFSET]); |
| #endif /* CONFIG_BLK_DEV_IDEPCI */ |
| } |
| goto out_lock; |
| } |
| drive = hwgroup->drive; |
| if (!drive) { |
| /* |
| * This should NEVER happen, and there isn't much we could do about it here. |
| */ |
| goto out_lock; |
| } |
| if (!drive_is_ready(drive)) { |
| /* |
| * This happens regularly when we share a PCI IRQ with another device. |
| * Unfortunately, it can also happen with some buggy drives that trigger |
| * the IRQ before their status register is up to date. Hopefully we have |
| * enough advance overhead that the latter isn't a problem. |
| */ |
| goto out_lock; |
| } |
| /* paranoia */ |
| if (!test_and_set_bit(IDE_BUSY, &hwgroup->flags)) |
| printk("%s: ide_intr: hwgroup was not busy??\n", drive->name); |
| hwgroup->handler = NULL; |
| del_timer(&hwgroup->timer); |
| spin_unlock(&ide_lock); |
| |
| if (drive->unmask) |
| ide__sti(); /* local CPU only */ |
| startstop = handler(drive); /* service this interrupt, may set handler for next interrupt */ |
| spin_lock_irq(&ide_lock); |
| |
| /* |
| * Note that handler() may have set things up for another |
| * interrupt to occur soon, but it cannot happen until |
| * we exit from this routine, because it will be the |
| * same irq as is currently being serviced here, and Linux |
| * won't allow another of the same (on any CPU) until we return. |
| */ |
| set_recovery_timer(HWIF(drive)); |
| drive->service_time = jiffies - drive->service_start; |
| if (startstop == ide_stopped) { |
| if (hwgroup->handler == NULL) { /* paranoia */ |
| clear_bit(IDE_BUSY, &hwgroup->flags); |
| ide_do_request(hwgroup, hwif->irq); |
| } else { |
| printk("%s: ide_intr: huh? expected NULL handler on exit\n", drive->name); |
| } |
| } |
| |
| out_lock: |
| spin_unlock_irqrestore(&ide_lock, flags); |
| } |
| |
| /* |
| * get_info_ptr() returns the (ide_drive_t *) for a given device number. |
| * It returns NULL if the given device number does not match any present drives. |
| */ |
| ide_drive_t *get_info_ptr (kdev_t i_rdev) |
| { |
| int major = major(i_rdev); |
| unsigned int h; |
| |
| for (h = 0; h < MAX_HWIFS; ++h) { |
| ide_hwif_t *hwif = &ide_hwifs[h]; |
| if (hwif->present && major == hwif->major) { |
| unsigned unit = DEVICE_NR(i_rdev); |
| if (unit < MAX_DRIVES) { |
| ide_drive_t *drive = &hwif->drives[unit]; |
| if (drive->present) |
| return drive; |
| } |
| break; |
| } |
| } |
| return NULL; |
| } |
| |
| /* |
| * This function is intended to be used prior to invoking ide_do_drive_cmd(). |
| */ |
| void ide_init_drive_cmd (struct request *rq) |
| { |
| memset(rq, 0, sizeof(*rq)); |
| rq->flags = REQ_DRIVE_CMD; |
| } |
| |
| /* |
| * This function issues a special IDE device request |
| * onto the request queue. |
| * |
| * If action is ide_wait, then the rq is queued at the end of the |
| * request queue, and the function sleeps until it has been processed. |
| * This is for use when invoked from an ioctl handler. |
| * |
| * If action is ide_preempt, then the rq is queued at the head of |
| * the request queue, displacing the currently-being-processed |
| * request and this function returns immediately without waiting |
| * for the new rq to be completed. This is VERY DANGEROUS, and is |
| * intended for careful use by the ATAPI tape/cdrom driver code. |
| * |
| * If action is ide_next, then the rq is queued immediately after |
| * the currently-being-processed-request (if any), and the function |
| * returns without waiting for the new rq to be completed. As above, |
| * This is VERY DANGEROUS, and is intended for careful use by the |
| * ATAPI tape/cdrom driver code. |
| * |
| * If action is ide_end, then the rq is queued at the end of the |
| * request queue, and the function returns immediately without waiting |
| * for the new rq to be completed. This is again intended for careful |
| * use by the ATAPI tape/cdrom driver code. |
| */ |
| int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action) |
| { |
| unsigned long flags; |
| ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| unsigned int major = HWIF(drive)->major; |
| request_queue_t *q = &drive->queue; |
| struct list_head *queue_head = &q->queue_head; |
| DECLARE_COMPLETION(wait); |
| |
| #ifdef CONFIG_BLK_DEV_PDC4030 |
| if (HWIF(drive)->chipset == ide_pdc4030 && rq->buffer != NULL) |
| return -ENOSYS; /* special drive cmds not supported */ |
| #endif |
| rq->errors = 0; |
| rq->rq_status = RQ_ACTIVE; |
| rq->rq_dev = mk_kdev(major,(drive->select.b.unit)<<PARTN_BITS); |
| if (action == ide_wait) |
| rq->waiting = &wait; |
| spin_lock_irqsave(&ide_lock, flags); |
| if (blk_queue_empty(&drive->queue) || action == ide_preempt) { |
| if (action == ide_preempt) |
| hwgroup->rq = NULL; |
| } else { |
| if (action == ide_wait || action == ide_end) { |
| queue_head = queue_head->prev; |
| } else |
| queue_head = queue_head->next; |
| } |
| q->elevator.elevator_add_req_fn(q, rq, queue_head); |
| ide_do_request(hwgroup, 0); |
| spin_unlock_irqrestore(&ide_lock, flags); |
| if (action == ide_wait) { |
| wait_for_completion(&wait); /* wait for it to be serviced */ |
| return rq->errors ? -EIO : 0; /* return -EIO if errors */ |
| } |
| return 0; |
| |
| } |
| |
| /* |
| * This routine is called to flush all partitions and partition tables |
| * for a changed disk, and then re-read the new partition table. |
| * If we are revalidating a disk because of a media change, then we |
| * enter with usage == 0. If we are using an ioctl, we automatically have |
| * usage == 1 (we need an open channel to use an ioctl :-), so this |
| * is our limit. |
| */ |
| int ide_revalidate_disk (kdev_t i_rdev) |
| { |
| ide_drive_t *drive; |
| ide_hwgroup_t *hwgroup; |
| unsigned long flags; |
| int res; |
| |
| if ((drive = get_info_ptr(i_rdev)) == NULL) |
| return -ENODEV; |
| hwgroup = HWGROUP(drive); |
| spin_lock_irqsave(&ide_lock, flags); |
| if (drive->busy || (drive->usage > 1)) { |
| spin_unlock_irqrestore(&ide_lock, flags); |
| return -EBUSY; |
| } |
| drive->busy = 1; |
| MOD_INC_USE_COUNT; |
| spin_unlock_irqrestore(&ide_lock, flags); |
| |
| res = wipe_partitions(i_rdev); |
| if (!res) { |
| if (ata_ops(drive) && ata_ops(drive)->revalidate) { |
| ata_get(ata_ops(drive)); |
| /* this is a no-op for tapes and SCSI based access */ |
| ata_ops(drive)->revalidate(drive); |
| ata_put(ata_ops(drive)); |
| } else |
| grok_partitions(i_rdev, ata_capacity(drive)); |
| } |
| |
| drive->busy = 0; |
| wake_up(&drive->wqueue); |
| MOD_DEC_USE_COUNT; |
| return res; |
| } |
| |
| /* |
| * Look again for all drives in the system on all interfaces. This is used |
| * after a new driver category has been loaded as module. |
| */ |
| void revalidate_drives(void) |
| { |
| ide_hwif_t *hwif; |
| ide_drive_t *drive; |
| int index; |
| int unit; |
| |
| for (index = 0; index < MAX_HWIFS; ++index) { |
| hwif = &ide_hwifs[index]; |
| for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| drive = &ide_hwifs[index].drives[unit]; |
| if (drive->revalidate) { |
| drive->revalidate = 0; |
| if (!initializing) |
| ide_revalidate_disk(mk_kdev(hwif->major, unit<<PARTN_BITS)); |
| } |
| } |
| } |
| } |
| |
| static void ide_probe_module(void) |
| { |
| ideprobe_init(); |
| revalidate_drives(); |
| } |
| |
| static void ide_driver_module (void) |
| { |
| int index; |
| |
| for (index = 0; index < MAX_HWIFS; ++index) |
| if (ide_hwifs[index].present) |
| goto search; |
| ide_probe_module(); |
| search: |
| |
| revalidate_drives(); |
| } |
| |
| static int ide_open(struct inode * inode, struct file * filp) |
| { |
| ide_drive_t *drive; |
| |
| if ((drive = get_info_ptr(inode->i_rdev)) == NULL) |
| return -ENXIO; |
| if (drive->driver == NULL) |
| ide_driver_module(); |
| |
| /* Request a particular device type module. |
| * |
| * FIXME: The function which should rather requests the drivers is |
| * ide_driver_module(), since it seems illogical and even a bit |
| * dangerous to delay this until open time! |
| */ |
| |
| #ifdef CONFIG_KMOD |
| if (drive->driver == NULL) { |
| char *module = NULL; |
| |
| switch (drive->type) { |
| case ATA_DISK: |
| module = "ide-disk"; |
| break; |
| case ATA_ROM: |
| module = "ide-cd"; |
| break; |
| case ATA_TAPE: |
| module = "ide-tape"; |
| break; |
| case ATA_FLOPPY: |
| module = "ide-floppy"; |
| break; |
| case ATA_SCSI: |
| module = "ide-scsi"; |
| break; |
| default: |
| /* nothing we can do about it */ ; |
| } |
| if (module) |
| request_module(module); |
| } |
| #endif |
| while (drive->busy) |
| sleep_on(&drive->wqueue); |
| ++drive->usage; |
| if (ata_ops(drive) && ata_ops(drive)->open) |
| return ata_ops(drive)->open(inode, filp, drive); |
| else { |
| --drive->usage; |
| return -ENODEV; |
| } |
| |
| printk(KERN_INFO "%s: driver not present\n", drive->name); |
| drive->usage--; |
| return -ENXIO; |
| } |
| |
| /* |
| * Releasing a block device means we sync() it, so that it can safely |
| * be forgotten about... |
| */ |
| static int ide_release(struct inode * inode, struct file * file) |
| { |
| ide_drive_t *drive; |
| |
| if (!(drive = get_info_ptr(inode->i_rdev))) |
| return 0; |
| |
| drive->usage--; |
| if (ata_ops(drive) && ata_ops(drive)->release) |
| ata_ops(drive)->release(inode, file, drive); |
| return 0; |
| } |
| |
| #ifdef CONFIG_PROC_FS |
| ide_proc_entry_t generic_subdriver_entries[] = { |
| { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, |
| { NULL, 0, NULL, NULL } |
| }; |
| #endif |
| |
| /* |
| * Note that we only release the standard ports, and do not even try to handle |
| * any extra ports allocated for weird IDE interface chipsets. |
| */ |
| static void hwif_unregister(ide_hwif_t *hwif) |
| { |
| if (hwif->straight8) { |
| ide_release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); |
| goto jump_eight; |
| } |
| if (hwif->io_ports[IDE_DATA_OFFSET]) |
| ide_release_region(hwif->io_ports[IDE_DATA_OFFSET], 1); |
| if (hwif->io_ports[IDE_ERROR_OFFSET]) |
| ide_release_region(hwif->io_ports[IDE_ERROR_OFFSET], 1); |
| if (hwif->io_ports[IDE_NSECTOR_OFFSET]) |
| ide_release_region(hwif->io_ports[IDE_NSECTOR_OFFSET], 1); |
| if (hwif->io_ports[IDE_SECTOR_OFFSET]) |
| ide_release_region(hwif->io_ports[IDE_SECTOR_OFFSET], 1); |
| if (hwif->io_ports[IDE_LCYL_OFFSET]) |
| ide_release_region(hwif->io_ports[IDE_LCYL_OFFSET], 1); |
| if (hwif->io_ports[IDE_HCYL_OFFSET]) |
| ide_release_region(hwif->io_ports[IDE_HCYL_OFFSET], 1); |
| if (hwif->io_ports[IDE_SELECT_OFFSET]) |
| ide_release_region(hwif->io_ports[IDE_SELECT_OFFSET], 1); |
| if (hwif->io_ports[IDE_STATUS_OFFSET]) |
| ide_release_region(hwif->io_ports[IDE_STATUS_OFFSET], 1); |
| jump_eight: |
| if (hwif->io_ports[IDE_CONTROL_OFFSET]) |
| ide_release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); |
| #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) |
| if (hwif->io_ports[IDE_IRQ_OFFSET]) |
| ide_release_region(hwif->io_ports[IDE_IRQ_OFFSET], 1); |
| #endif |
| } |
| |
| void ide_unregister (unsigned int index) |
| { |
| struct gendisk *gd; |
| ide_drive_t *drive, *d; |
| ide_hwif_t *hwif, *g; |
| ide_hwgroup_t *hwgroup; |
| int irq_count = 0, unit, i; |
| unsigned long flags; |
| unsigned int p, minor; |
| ide_hwif_t old_hwif; |
| |
| if (index >= MAX_HWIFS) |
| return; |
| save_flags(flags); /* all CPUs */ |
| cli(); /* all CPUs */ |
| hwif = &ide_hwifs[index]; |
| if (!hwif->present) |
| goto abort; |
| put_device(&hwif->device); |
| for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| drive = &hwif->drives[unit]; |
| if (!drive->present) |
| continue; |
| if (drive->busy || drive->usage) |
| goto abort; |
| if (ata_ops(drive)) { |
| if (ata_ops(drive)->cleanup) { |
| if (ata_ops(drive)->cleanup(drive)) |
| goto abort; |
| } else |
| ide_unregister_subdriver(drive); |
| } |
| } |
| hwif->present = 0; |
| |
| /* |
| * All clear? Then blow away the buffer cache |
| */ |
| sti(); |
| for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| drive = &hwif->drives[unit]; |
| if (!drive->present) |
| continue; |
| minor = drive->select.b.unit << PARTN_BITS; |
| for (p = 0; p < (1<<PARTN_BITS); ++p) { |
| if (drive->part[p].nr_sects > 0) { |
| kdev_t devp = mk_kdev(hwif->major, minor+p); |
| invalidate_device(devp, 0); |
| } |
| } |
| #ifdef CONFIG_PROC_FS |
| destroy_proc_ide_drives(hwif); |
| #endif |
| } |
| cli(); |
| hwgroup = hwif->hwgroup; |
| |
| /* |
| * free the irq if we were the only hwif using it |
| */ |
| g = hwgroup->hwif; |
| do { |
| if (g->irq == hwif->irq) |
| ++irq_count; |
| g = g->next; |
| } while (g != hwgroup->hwif); |
| if (irq_count == 1) |
| free_irq(hwif->irq, hwgroup); |
| |
| hwif_unregister(hwif); |
| |
| /* |
| * Remove us from the hwgroup, and free |
| * the hwgroup if we were the only member |
| */ |
| d = hwgroup->drive; |
| for (i = 0; i < MAX_DRIVES; ++i) { |
| drive = &hwif->drives[i]; |
| if (drive->de) { |
| devfs_unregister (drive->de); |
| drive->de = NULL; |
| } |
| if (!drive->present) |
| continue; |
| while (hwgroup->drive->next != drive) |
| hwgroup->drive = hwgroup->drive->next; |
| hwgroup->drive->next = drive->next; |
| if (hwgroup->drive == drive) |
| hwgroup->drive = NULL; |
| if (drive->id != NULL) { |
| kfree(drive->id); |
| drive->id = NULL; |
| } |
| drive->present = 0; |
| blk_cleanup_queue(&drive->queue); |
| } |
| if (d->present) |
| hwgroup->drive = d; |
| while (hwgroup->hwif->next != hwif) |
| hwgroup->hwif = hwgroup->hwif->next; |
| hwgroup->hwif->next = hwif->next; |
| if (hwgroup->hwif == hwif) |
| kfree(hwgroup); |
| else |
| hwgroup->hwif = HWIF(hwgroup->drive); |
| |
| #if defined(CONFIG_BLK_DEV_IDEDMA) && !defined(CONFIG_DMA_NONPCI) |
| if (hwif->dma_base) { |
| (void) ide_release_dma(hwif); |
| hwif->dma_base = 0; |
| } |
| #endif /* (CONFIG_BLK_DEV_IDEDMA) && !(CONFIG_DMA_NONPCI) */ |
| |
| /* |
| * Remove us from the kernel's knowledge |
| */ |
| unregister_blkdev(hwif->major, hwif->name); |
| kfree(blksize_size[hwif->major]); |
| blk_dev[hwif->major].data = NULL; |
| blk_dev[hwif->major].queue = NULL; |
| blk_clear(hwif->major); |
| gd = hwif->gd; |
| if (gd) { |
| del_gendisk(gd); |
| kfree(gd->sizes); |
| kfree(gd->part); |
| if (gd->de_arr) |
| kfree (gd->de_arr); |
| if (gd->flags) |
| kfree (gd->flags); |
| kfree(gd); |
| hwif->gd = NULL; |
| } |
| old_hwif = *hwif; |
| init_hwif_data(index); /* restore hwif data to pristine status */ |
| hwif->hwgroup = old_hwif.hwgroup; |
| hwif->tuneproc = old_hwif.tuneproc; |
| hwif->speedproc = old_hwif.speedproc; |
| hwif->selectproc = old_hwif.selectproc; |
| hwif->resetproc = old_hwif.resetproc; |
| hwif->intrproc = old_hwif.intrproc; |
| hwif->maskproc = old_hwif.maskproc; |
| hwif->quirkproc = old_hwif.quirkproc; |
| hwif->rwproc = old_hwif.rwproc; |
| hwif->ideproc = old_hwif.ideproc; |
| hwif->dmaproc = old_hwif.dmaproc; |
| hwif->busproc = old_hwif.busproc; |
| hwif->bus_state = old_hwif.bus_state; |
| hwif->dma_base = old_hwif.dma_base; |
| hwif->dma_extra = old_hwif.dma_extra; |
| hwif->config_data = old_hwif.config_data; |
| hwif->select_data = old_hwif.select_data; |
| hwif->proc = old_hwif.proc; |
| #ifndef CONFIG_BLK_DEV_IDECS |
| hwif->irq = old_hwif.irq; |
| #endif |
| hwif->major = old_hwif.major; |
| hwif->chipset = old_hwif.chipset; |
| hwif->autodma = old_hwif.autodma; |
| hwif->udma_four = old_hwif.udma_four; |
| #ifdef CONFIG_BLK_DEV_IDEPCI |
| hwif->pci_dev = old_hwif.pci_dev; |
| #endif |
| hwif->straight8 = old_hwif.straight8; |
| abort: |
| restore_flags(flags); /* all CPUs */ |
| } |
| |
| /* |
| * Setup hw_regs_t structure described by parameters. You |
| * may set up the hw structure yourself OR use this routine to |
| * do it for you. |
| */ |
| void ide_setup_ports ( hw_regs_t *hw, |
| ide_ioreg_t base, int *offsets, |
| ide_ioreg_t ctrl, ide_ioreg_t intr, |
| ide_ack_intr_t *ack_intr, int irq) |
| { |
| int i; |
| |
| for (i = 0; i < IDE_NR_PORTS; i++) { |
| if (offsets[i] == -1) { |
| switch(i) { |
| case IDE_CONTROL_OFFSET: |
| hw->io_ports[i] = ctrl; |
| break; |
| #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) |
| case IDE_IRQ_OFFSET: |
| hw->io_ports[i] = intr; |
| break; |
| #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ |
| default: |
| hw->io_ports[i] = 0; |
| break; |
| } |
| } else { |
| hw->io_ports[i] = base + offsets[i]; |
| } |
| } |
| hw->irq = irq; |
| hw->dma = NO_DMA; |
| hw->ack_intr = ack_intr; |
| } |
| |
| /* |
| * Register an IDE interface, specifing exactly the registers etc |
| * Set init=1 iff calling before probes have taken place. |
| */ |
| int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp) |
| { |
| int index, retry = 1; |
| ide_hwif_t *hwif; |
| |
| do { |
| for (index = 0; index < MAX_HWIFS; ++index) { |
| hwif = &ide_hwifs[index]; |
| if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET]) |
| goto found; |
| } |
| for (index = 0; index < MAX_HWIFS; ++index) { |
| hwif = &ide_hwifs[index]; |
| if ((!hwif->present && !hwif->mate && !initializing) || |
| (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing)) |
| goto found; |
| } |
| for (index = 0; index < MAX_HWIFS; index++) |
| ide_unregister(index); |
| } while (retry--); |
| return -1; |
| found: |
| if (hwif->present) |
| ide_unregister(index); |
| if (hwif->present) |
| return -1; |
| memcpy(&hwif->hw, hw, sizeof(*hw)); |
| memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports)); |
| hwif->irq = hw->irq; |
| hwif->noprobe = 0; |
| hwif->chipset = hw->chipset; |
| |
| if (!initializing) { |
| ide_probe_module(); |
| #ifdef CONFIG_PROC_FS |
| create_proc_ide_interfaces(); |
| #endif |
| ide_driver_module(); |
| } |
| |
| if (hwifp) |
| *hwifp = hwif; |
| |
| return (initializing || hwif->present) ? index : -1; |
| } |
| |
| /* |
| * Compatability function with existing drivers. If you want |
| * something different, use the function above. |
| */ |
| int ide_register(int arg1, int arg2, int irq) |
| { |
| hw_regs_t hw; |
| ide_init_hwif_ports(&hw, (ide_ioreg_t) arg1, (ide_ioreg_t) arg2, NULL); |
| hw.irq = irq; |
| return ide_register_hw(&hw, NULL); |
| } |
| |
| void 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) |
| { |
| ide_settings_t **p = &drive->settings; |
| ide_settings_t *setting = NULL; |
| |
| while ((*p) && strcmp((*p)->name, name) < 0) |
| p = &((*p)->next); |
| if ((setting = kmalloc(sizeof(*setting), GFP_KERNEL)) == NULL) |
| goto abort; |
| memset(setting, 0, sizeof(*setting)); |
| if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL) |
| goto abort; |
| strcpy(setting->name, name); setting->rw = rw; |
| setting->read_ioctl = read_ioctl; setting->write_ioctl = write_ioctl; |
| setting->data_type = data_type; setting->min = min; |
| setting->max = max; setting->mul_factor = mul_factor; |
| setting->div_factor = div_factor; setting->data = data; |
| setting->set = set; setting->next = *p; |
| if (drive->driver) |
| setting->auto_remove = 1; |
| *p = setting; |
| return; |
| abort: |
| if (setting) |
| kfree(setting); |
| } |
| |
| void ide_remove_setting (ide_drive_t *drive, char *name) |
| { |
| ide_settings_t **p = &drive->settings, *setting; |
| |
| while ((*p) && strcmp((*p)->name, name)) |
| p = &((*p)->next); |
| if ((setting = (*p)) == NULL) |
| return; |
| (*p) = setting->next; |
| kfree(setting->name); |
| kfree(setting); |
| } |
| |
| static void auto_remove_settings (ide_drive_t *drive) |
| { |
| ide_settings_t *setting; |
| repeat: |
| setting = drive->settings; |
| while (setting) { |
| if (setting->auto_remove) { |
| ide_remove_setting(drive, setting->name); |
| goto repeat; |
| } |
| setting = setting->next; |
| } |
| } |
| |
| int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting) |
| { |
| int val = -EINVAL; |
| unsigned long flags; |
| |
| if ((setting->rw & SETTING_READ)) { |
| spin_lock_irqsave(&ide_lock, flags); |
| switch(setting->data_type) { |
| case TYPE_BYTE: |
| val = *((u8 *) setting->data); |
| break; |
| case TYPE_SHORT: |
| val = *((u16 *) setting->data); |
| break; |
| case TYPE_INT: |
| case TYPE_INTA: |
| val = *((u32 *) setting->data); |
| break; |
| } |
| spin_unlock_irqrestore(&ide_lock, flags); |
| } |
| return val; |
| } |
| |
| int ide_spin_wait_hwgroup (ide_drive_t *drive) |
| { |
| ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| unsigned long timeout = jiffies + (3 * HZ); |
| |
| spin_lock_irq(&ide_lock); |
| |
| while (test_bit(IDE_BUSY, &hwgroup->flags)) { |
| unsigned long lflags; |
| spin_unlock_irq(&ide_lock); |
| __save_flags(lflags); /* local CPU only */ |
| __sti(); /* local CPU only; needed for jiffies */ |
| if (0 < (signed long)(jiffies - timeout)) { |
| __restore_flags(lflags); /* local CPU only */ |
| printk("%s: channel busy\n", drive->name); |
| return -EBUSY; |
| } |
| __restore_flags(lflags); /* local CPU only */ |
| spin_lock_irq(&ide_lock); |
| } |
| return 0; |
| } |
| |
| /* |
| * FIXME: This should be changed to enqueue a special request |
| * to the driver to change settings, and then wait on a semaphore for completion. |
| * The current scheme of polling is kludgey, though safe enough. |
| */ |
| int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val) |
| { |
| int i; |
| u32 *p; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| if (!(setting->rw & SETTING_WRITE)) |
| return -EPERM; |
| if (val < setting->min || val > setting->max) |
| return -EINVAL; |
| if (setting->set) |
| return setting->set(drive, val); |
| if (ide_spin_wait_hwgroup(drive)) |
| return -EBUSY; |
| switch (setting->data_type) { |
| case TYPE_BYTE: |
| *((u8 *) setting->data) = val; |
| break; |
| case TYPE_SHORT: |
| *((u16 *) setting->data) = val; |
| break; |
| case TYPE_INT: |
| *((u32 *) setting->data) = val; |
| break; |
| case TYPE_INTA: |
| p = (u32 *) setting->data; |
| for (i = 0; i < 1 << PARTN_BITS; i++, p++) |
| *p = val; |
| break; |
| } |
| spin_unlock_irq(&ide_lock); |
| return 0; |
| } |
| |
| static int set_io_32bit(ide_drive_t *drive, int arg) |
| { |
| drive->io_32bit = arg; |
| #ifdef CONFIG_BLK_DEV_DTC2278 |
| if (HWIF(drive)->chipset == ide_dtc2278) |
| HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg; |
| #endif /* CONFIG_BLK_DEV_DTC2278 */ |
| return 0; |
| } |
| |
| static int set_using_dma (ide_drive_t *drive, int arg) |
| { |
| if (!drive->driver) |
| return -EPERM; |
| if (!drive->id || !(drive->id->capability & 1) || !HWIF(drive)->dmaproc) |
| return -EPERM; |
| if (HWIF(drive)->dmaproc(arg ? ide_dma_on : ide_dma_off, drive)) |
| return -EIO; |
| return 0; |
| } |
| |
| static int set_pio_mode (ide_drive_t *drive, int arg) |
| { |
| struct request rq; |
| |
| if (!HWIF(drive)->tuneproc) |
| return -ENOSYS; |
| if (drive->special.b.set_tune) |
| return -EBUSY; |
| ide_init_drive_cmd(&rq); |
| drive->tune_req = (byte) arg; |
| drive->special.b.set_tune = 1; |
| (void) ide_do_drive_cmd (drive, &rq, ide_wait); |
| return 0; |
| } |
| |
| void ide_add_generic_settings (ide_drive_t *drive) |
| { |
| /* |
| * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function |
| */ |
| 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); |
| ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL); |
| ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL); |
| ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode); |
| ide_add_setting(drive, "slow", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->slow, NULL); |
| 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); |
| 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); |
| ide_add_setting(drive, "ide_scsi", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->scsi, NULL); |
| ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 69, 1, 1, &drive->init_speed, NULL); |
| ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 69, 1, 1, &drive->current_speed, NULL); |
| ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL); |
| } |
| |
| /* |
| * Delay for *at least* 50ms. As we don't know how much time is left |
| * until the next tick occurs, we wait an extra tick to be safe. |
| * This is used only during the probing/polling for drives at boot time. |
| * |
| * However, its usefullness may be needed in other places, thus we export it now. |
| * The future may change this to a millisecond setable delay. |
| */ |
| void ide_delay_50ms (void) |
| { |
| #ifndef CONFIG_BLK_DEV_IDECS |
| mdelay(50); |
| #else |
| __set_current_state(TASK_UNINTERRUPTIBLE); |
| schedule_timeout(HZ/20); |
| #endif /* CONFIG_BLK_DEV_IDECS */ |
| } |
| |
| static int ide_ioctl (struct inode *inode, struct file *file, |
| unsigned int cmd, unsigned long arg) |
| { |
| int err = 0, major, minor; |
| ide_drive_t *drive; |
| struct request rq; |
| kdev_t dev; |
| ide_settings_t *setting; |
| |
| dev = inode->i_rdev; |
| major = major(dev); minor = minor(dev); |
| if ((drive = get_info_ptr(inode->i_rdev)) == NULL) |
| return -ENODEV; |
| |
| /* Find setting by ioctl */ |
| |
| setting = drive->settings; |
| |
| while (setting) { |
| if (setting->read_ioctl == cmd || setting->write_ioctl == cmd) |
| break; |
| setting = setting->next; |
| } |
| |
| if (setting != NULL) { |
| if (cmd == setting->read_ioctl) { |
| err = ide_read_setting(drive, setting); |
| return err >= 0 ? put_user(err, (long *) arg) : err; |
| } else { |
| if ((minor(inode->i_rdev) & PARTN_MASK)) |
| return -EINVAL; |
| return ide_write_setting(drive, setting, arg); |
| } |
| } |
| |
| ide_init_drive_cmd (&rq); |
| switch (cmd) { |
| case HDIO_GETGEO: |
| { |
| struct hd_geometry *loc = (struct hd_geometry *) arg; |
| unsigned short bios_cyl = drive->bios_cyl; /* truncate */ |
| |
| if (!loc || (drive->type != ATA_DISK && drive->type != ATA_FLOPPY)) |
| return -EINVAL; |
| if (put_user(drive->bios_head, (byte *) &loc->heads)) return -EFAULT; |
| if (put_user(drive->bios_sect, (byte *) &loc->sectors)) return -EFAULT; |
| if (put_user(bios_cyl, (unsigned short *) &loc->cylinders)) return -EFAULT; |
| if (put_user((unsigned)drive->part[minor(inode->i_rdev)&PARTN_MASK].start_sect, |
| (unsigned long *) &loc->start)) return -EFAULT; |
| return 0; |
| } |
| |
| case HDIO_GETGEO_BIG: |
| { |
| struct hd_big_geometry *loc = (struct hd_big_geometry *) arg; |
| |
| if (!loc || (drive->type != ATA_DISK && drive->type != ATA_FLOPPY)) |
| return -EINVAL; |
| |
| if (put_user(drive->bios_head, (byte *) &loc->heads)) return -EFAULT; |
| if (put_user(drive->bios_sect, (byte *) &loc->sectors)) return -EFAULT; |
| if (put_user(drive->bios_cyl, (unsigned int *) &loc->cylinders)) return -EFAULT; |
| if (put_user((unsigned)drive->part[minor(inode->i_rdev)&PARTN_MASK].start_sect, |
| (unsigned long *) &loc->start)) return -EFAULT; |
| return 0; |
| } |
| |
| case HDIO_GETGEO_BIG_RAW: |
| { |
| struct hd_big_geometry *loc = (struct hd_big_geometry *) arg; |
| if (!loc || (drive->type != ATA_DISK && drive->type != ATA_FLOPPY)) |
| return -EINVAL; |
| if (put_user(drive->head, (byte *) &loc->heads)) return -EFAULT; |
| if (put_user(drive->sect, (byte *) &loc->sectors)) return -EFAULT; |
| if (put_user(drive->cyl, (unsigned int *) &loc->cylinders)) return -EFAULT; |
| if (put_user((unsigned)drive->part[minor(inode->i_rdev)&PARTN_MASK].start_sect, |
| (unsigned long *) &loc->start)) return -EFAULT; |
| return 0; |
| } |
| |
| case BLKRRPART: /* Re-read partition tables */ |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| return ide_revalidate_disk(inode->i_rdev); |
| |
| case HDIO_OBSOLETE_IDENTITY: |
| case HDIO_GET_IDENTITY: |
| if (minor(inode->i_rdev) & PARTN_MASK) |
| return -EINVAL; |
| if (drive->id == NULL) |
| return -ENOMSG; |
| if (copy_to_user((char *)arg, (char *)drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) |
| return -EFAULT; |
| return 0; |
| |
| case HDIO_GET_NICE: |
| return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | |
| drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | |
| drive->nice0 << IDE_NICE_0 | |
| drive->nice1 << IDE_NICE_1 | |
| drive->nice2 << IDE_NICE_2, |
| (long *) arg); |
| |
| case HDIO_DRIVE_CMD: |
| if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) |
| return -EACCES; |
| return ide_cmd_ioctl(drive, inode, file, cmd, arg); |
| |
| case HDIO_DRIVE_TASK: |
| if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) |
| return -EACCES; |
| return ide_task_ioctl(drive, inode, file, cmd, arg); |
| |
| case HDIO_SCAN_HWIF: |
| { |
| int args[3]; |
| if (!capable(CAP_SYS_ADMIN)) return -EACCES; |
| if (copy_from_user(args, (void *)arg, 3 * sizeof(int))) |
| return -EFAULT; |
| if (ide_register(args[0], args[1], args[2]) == -1) |
| return -EIO; |
| return 0; |
| } |
| case HDIO_UNREGISTER_HWIF: |
| if (!capable(CAP_SYS_ADMIN)) return -EACCES; |
| /* (arg > MAX_HWIFS) checked in function */ |
| ide_unregister(arg); |
| return 0; |
| case HDIO_SET_NICE: |
| if (!capable(CAP_SYS_ADMIN)) return -EACCES; |
| if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) |
| return -EPERM; |
| drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; |
| /* Only CD-ROM's and tapes support DSC overlap. */ |
| if (drive->dsc_overlap && !(drive->type == ATA_ROM || drive->type == ATA_TAPE)) { |
| drive->dsc_overlap = 0; |
| return -EPERM; |
| } |
| drive->nice1 = (arg >> IDE_NICE_1) & 1; |
| return 0; |
| case HDIO_DRIVE_RESET: |
| { |
| unsigned long flags; |
| ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| |
| if (!capable(CAP_SYS_ADMIN)) return -EACCES; |
| #if 1 |
| spin_lock_irqsave(&ide_lock, flags); |
| if (hwgroup->handler != NULL) { |
| printk("%s: ide_set_handler: handler not null; %p\n", drive->name, hwgroup->handler); |
| hwgroup->handler(drive); |
| hwgroup->timer.expires = jiffies + 0;; |
| del_timer(&hwgroup->timer); |
| } |
| spin_unlock_irqrestore(&ide_lock, flags); |
| #endif |
| ide_do_reset(drive); |
| if (drive->suspend_reset) |
| return ide_revalidate_disk(inode->i_rdev); |
| return 0; |
| } |
| case BLKGETSIZE: |
| case BLKGETSIZE64: |
| case BLKROSET: |
| case BLKROGET: |
| case BLKFLSBUF: |
| case BLKSSZGET: |
| case BLKPG: |
| case BLKELVGET: |
| case BLKELVSET: |
| case BLKBSZGET: |
| case BLKBSZSET: |
| return blk_ioctl(inode->i_bdev, cmd, arg); |
| |
| /* |
| * uniform packet command handling |
| */ |
| case CDROMEJECT: |
| case CDROMCLOSETRAY: |
| return block_ioctl(inode->i_rdev, cmd, arg); |
| |
| case HDIO_GET_BUSSTATE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| if (put_user(HWIF(drive)->bus_state, (long *)arg)) |
| return -EFAULT; |
| return 0; |
| |
| case HDIO_SET_BUSSTATE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| if (HWIF(drive)->busproc) |
| HWIF(drive)->busproc(drive, (int)arg); |
| return 0; |
| |
| default: |
| if (ata_ops(drive) && ata_ops(drive)->ioctl) |
| return ata_ops(drive)->ioctl(drive, inode, file, cmd, arg); |
| return -EINVAL; |
| } |
| } |
| |
| static int ide_check_media_change (kdev_t i_rdev) |
| { |
| ide_drive_t *drive; |
| |
| if ((drive = get_info_ptr(i_rdev)) == NULL) |
| return -ENODEV; |
| if (ata_ops(drive)) { |
| ata_get(ata_ops(drive)); |
| if (ata_ops(drive)->check_media_change) |
| return ata_ops(drive)->check_media_change(drive); |
| else |
| return 1; /* assume it was changed */ |
| ata_put(ata_ops(drive)); |
| } |
| return 0; |
| } |
| |
| void ide_fixstring (byte *s, const int bytecount, const int byteswap) |
| { |
| byte *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ |
| |
| if (byteswap) { |
| /* convert from big-endian to host byte order */ |
| for (p = end ; p != s;) { |
| unsigned short *pp = (unsigned short *) (p -= 2); |
| *pp = ntohs(*pp); |
| } |
| } |
| |
| /* strip leading blanks */ |
| while (s != end && *s == ' ') |
| ++s; |
| |
| /* compress internal blanks and strip trailing blanks */ |
| while (s != end && *s) { |
| if (*s++ != ' ' || (s != end && *s && *s != ' ')) |
| *p++ = *(s-1); |
| } |
| |
| /* wipe out trailing garbage */ |
| while (p != end) |
| *p++ = '\0'; |
| } |
| |
| /* |
| * stridx() returns the offset of c within s, |
| * or -1 if c is '\0' or not found within s. |
| */ |
| static int __init stridx (const char *s, char c) |
| { |
| char *i = strchr(s, c); |
| return (i && c) ? i - s : -1; |
| } |
| |
| /* |
| * match_parm() does parsing for ide_setup(): |
| * |
| * 1. the first char of s must be '='. |
| * 2. if the remainder matches one of the supplied keywords, |
| * the index (1 based) of the keyword is negated and returned. |
| * 3. if the remainder is a series of no more than max_vals numbers |
| * separated by commas, the numbers are saved in vals[] and a |
| * count of how many were saved is returned. Base10 is assumed, |
| * and base16 is allowed when prefixed with "0x". |
| * 4. otherwise, zero is returned. |
| */ |
| static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) |
| { |
| static const char *decimal = "0123456789"; |
| static const char *hex = "0123456789abcdef"; |
| int i, n; |
| |
| if (*s++ == '=') { |
| /* |
| * Try matching against the supplied keywords, |
| * and return -(index+1) if we match one |
| */ |
| if (keywords != NULL) { |
| for (i = 0; *keywords != NULL; ++i) { |
| if (!strcmp(s, *keywords++)) |
| return -(i+1); |
| } |
| } |
| /* |
| * Look for a series of no more than "max_vals" |
| * numeric values separated by commas, in base10, |
| * or base16 when prefixed with "0x". |
| * Return a count of how many were found. |
| */ |
| for (n = 0; (i = stridx(decimal, *s)) >= 0;) { |
| vals[n] = i; |
| while ((i = stridx(decimal, *++s)) >= 0) |
| vals[n] = (vals[n] * 10) + i; |
| if (*s == 'x' && !vals[n]) { |
| while ((i = stridx(hex, *++s)) >= 0) |
| vals[n] = (vals[n] * 0x10) + i; |
| } |
| if (++n == max_vals) |
| break; |
| if (*s == ',' || *s == ';') |
| ++s; |
| } |
| if (!*s) |
| return n; |
| } |
| return 0; /* zero = nothing matched */ |
| } |
| |
| /* |
| * This gets called VERY EARLY during initialization, to handle kernel "command |
| * line" strings beginning with "hdx=" or "ide".It gets called even before the |
| * actual module gets initialized. |
| * |
| * Here is the complete set currently supported comand line options: |
| * |
| * "hdx=" is recognized for all "x" from "a" to "h", such as "hdc". |
| * "idex=" is recognized for all "x" from "0" to "3", such as "ide1". |
| * |
| * "hdx=noprobe" : drive may be present, but do not probe for it |
| * "hdx=none" : drive is NOT present, ignore cmos and do not probe |
| * "hdx=nowerr" : ignore the WRERR_STAT bit on this drive |
| * "hdx=cdrom" : drive is present, and is a cdrom drive |
| * "hdx=cyl,head,sect" : disk drive is present, with specified geometry |
| * "hdx=noremap" : do not remap 0->1 even though EZD was detected |
| * "hdx=autotune" : driver will attempt to tune interface speed |
| * to the fastest PIO mode supported, |
| * if possible for this drive only. |
| * Not fully supported by all chipset types, |
| * and quite likely to cause trouble with |
| * older/odd IDE drives. |
| * |
| * "hdx=slow" : insert a huge pause after each access to the data |
| * port. Should be used only as a last resort. |
| * |
| * "hdx=swapdata" : when the drive is a disk, byte swap all data |
| * "hdx=bswap" : same as above.......... |
| * "hdxlun=xx" : set the drive last logical unit. |
| * "hdx=flash" : allows for more than one ata_flash disk to be |
| * registered. In most cases, only one device |
| * will be present. |
| * "hdx=scsi" : the return of the ide-scsi flag, this is useful for |
| * allowwing ide-floppy, ide-tape, and ide-cdrom|writers |
| * to use ide-scsi emulation on a device specific option. |
| * "idebus=xx" : inform IDE driver of VESA/PCI bus speed in MHz, |
| * where "xx" is between 20 and 66 inclusive, |
| * used when tuning chipset PIO modes. |
| * For PCI bus, 25 is correct for a P75 system, |
| * 30 is correct for P90,P120,P180 systems, |
| * and 33 is used for P100,P133,P166 systems. |
| * If in doubt, use idebus=33 for PCI. |
| * As for VLB, it is safest to not specify it. |
| * |
| * "idex=noprobe" : do not attempt to access/use this interface |
| * "idex=base" : probe for an interface at the address specified, |
| * where "base" is usually 0x1f0 or 0x170 |
| * and "ctl" is assumed to be "base"+0x206 |
| * "idex=base,ctl" : specify both base and ctl |
| * "idex=base,ctl,irq" : specify base, ctl, and irq number |
| * "idex=autotune" : driver will attempt to tune interface speed |
| * to the fastest PIO mode supported, |
| * for all drives on this interface. |
| * Not fully supported by all chipset types, |
| * and quite likely to cause trouble with |
| * older/odd IDE drives. |
| * "idex=noautotune" : driver will NOT attempt to tune interface speed |
| * This is the default for most chipsets, |
| * except the cmd640. |
| * "idex=serialize" : do not overlap operations on idex and ide(x^1) |
| * "idex=four" : four drives on idex and ide(x^1) share same ports |
| * "idex=reset" : reset interface before first use |
| * "idex=dma" : enable DMA by default on both drives if possible |
| * "idex=ata66" : informs the interface that it has an 80c cable |
| * for chipsets that are ATA-66 capable, but |
| * the ablity to bit test for detection is |
| * currently unknown. |
| * "ide=reverse" : Formerly called to pci sub-system, but now local. |
| * |
| * The following are valid ONLY on ide0, (except dc4030) |
| * and the defaults for the base,ctl ports must not be altered. |
| * |
| * "ide0=dtc2278" : probe/support DTC2278 interface |
| * "ide0=ht6560b" : probe/support HT6560B interface |
| * "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip |
| * (not for PCI -- automatically detected) |
| * "ide0=qd65xx" : probe/support qd65xx interface |
| * "ide0=ali14xx" : probe/support ali14xx chipsets (ALI M1439, M1443, M1445) |
| * "ide0=umc8672" : probe/support umc8672 chipsets |
| * "idex=dc4030" : probe/support Promise DC4030VL interface |
| * "ide=doubler" : probe/support IDE doublers on Amiga |
| */ |
| int __init ide_setup (char *s) |
| { |
| int i, vals[3]; |
| ide_hwif_t *hwif; |
| ide_drive_t *drive; |
| unsigned int hw, unit; |
| const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); |
| const char max_hwif = '0' + (MAX_HWIFS - 1); |
| |
| if (!strncmp(s, "hd=", 3)) /* hd= is for hd.c driver and not us */ |
| return 0; |
| |
| if (strncmp(s,"ide",3) && |
| strncmp(s,"idebus",6) && |
| strncmp(s,"hd",2)) /* hdx= & hdxlun= */ |
| return 0; |
| |
| printk("ide_setup: %s", s); |
| init_ide_data (); |
| |
| #ifdef CONFIG_BLK_DEV_IDEDOUBLER |
| if (!strcmp(s, "ide=doubler")) { |
| extern int ide_doubler; |
| |
| printk(" : Enabled support for IDE doublers\n"); |
| ide_doubler = 1; |
| return 1; |
| } |
| #endif |
| |
| if (!strcmp(s, "ide=nodma")) { |
| printk("IDE: Prevented DMA\n"); |
| noautodma = 1; |
| return 1; |
| } |
| |
| #ifdef CONFIG_BLK_DEV_IDEPCI |
| if (!strcmp(s, "ide=reverse")) { |
| ide_scan_direction = 1; |
| printk(" : Enabled support for IDE inverse scan order.\n"); |
| return 1; |
| } |
| #endif /* CONFIG_BLK_DEV_IDEPCI */ |
| |
| /* |
| * Look for drive options: "hdx=" |
| */ |
| if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { |
| const char *hd_words[] = {"none", "noprobe", "nowerr", "cdrom", |
| "serialize", "autotune", "noautotune", |
| "slow", "swapdata", "bswap", "flash", |
| "remap", "noremap", "scsi", NULL}; |
| unit = s[2] - 'a'; |
| hw = unit / MAX_DRIVES; |
| unit = unit % MAX_DRIVES; |
| hwif = &ide_hwifs[hw]; |
| drive = &hwif->drives[unit]; |
| if (strncmp(s + 4, "ide-", 4) == 0) { |
| strncpy(drive->driver_req, s + 4, 9); |
| goto done; |
| } |
| /* |
| * Look for last lun option: "hdxlun=" |
| */ |
| if (s[3] == 'l' && s[4] == 'u' && s[5] == 'n') { |
| if (match_parm(&s[6], NULL, vals, 1) != 1) |
| goto bad_option; |
| if (vals[0] >= 0 && vals[0] <= 7) { |
| drive->last_lun = vals[0]; |
| drive->forced_lun = 1; |
| } else |
| printk(" -- BAD LAST LUN! Expected value from 0 to 7"); |
| goto done; |
| } |
| switch (match_parm(&s[3], hd_words, vals, 3)) { |
| case -1: /* "none" */ |
| drive->nobios = 1; /* drop into "noprobe" */ |
| case -2: /* "noprobe" */ |
| drive->noprobe = 1; |
| goto done; |
| case -3: /* "nowerr" */ |
| drive->bad_wstat = BAD_R_STAT; |
| hwif->noprobe = 0; |
| goto done; |
| case -4: /* "cdrom" */ |
| drive->present = 1; |
| drive->type = ATA_ROM; |
| hwif->noprobe = 0; |
| goto done; |
| case -5: /* "serialize" */ |
| printk(" -- USE \"ide%d=serialize\" INSTEAD", hw); |
| goto do_serialize; |
| case -6: /* "autotune" */ |
| drive->autotune = 1; |
| goto done; |
| case -7: /* "noautotune" */ |
| drive->autotune = 2; |
| goto done; |
| case -8: /* "slow" */ |
| drive->slow = 1; |
| goto done; |
| case -9: /* "swapdata" or "bswap" */ |
| case -10: |
| drive->bswap = 1; |
| goto done; |
| case -11: /* "flash" */ |
| drive->ata_flash = 1; |
| goto done; |
| case -12: /* "remap" */ |
| drive->remap_0_to_1 = 1; |
| goto done; |
| case -13: /* "noremap" */ |
| drive->remap_0_to_1 = 2; |
| goto done; |
| case -14: /* "scsi" */ |
| #if defined(CONFIG_BLK_DEV_IDESCSI) && defined(CONFIG_SCSI) |
| drive->scsi = 1; |
| goto done; |
| #else |
| drive->scsi = 0; |
| goto bad_option; |
| #endif /* defined(CONFIG_BLK_DEV_IDESCSI) && defined(CONFIG_SCSI) */ |
| case 3: /* cyl,head,sect */ |
| drive->type = ATA_DISK; |
| drive->cyl = drive->bios_cyl = vals[0]; |
| drive->head = drive->bios_head = vals[1]; |
| drive->sect = drive->bios_sect = vals[2]; |
| drive->present = 1; |
| drive->forced_geom = 1; |
| hwif->noprobe = 0; |
| goto done; |
| default: |
| goto bad_option; |
| } |
| } |
| |
| if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') |
| goto bad_option; |
| /* |
| * Look for bus speed option: "idebus=" |
| */ |
| if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { |
| if (match_parm(&s[6], NULL, vals, 1) != 1) |
| goto bad_option; |
| if (vals[0] >= 20 && vals[0] <= 66) { |
| idebus_parameter = vals[0]; |
| } else |
| printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); |
| goto done; |
| } |
| /* |
| * Look for interface options: "idex=" |
| */ |
| if (s[3] >= '0' && s[3] <= max_hwif) { |
| /* |
| * Be VERY CAREFUL changing this: note hardcoded indexes below |
| * -8,-9,-10 : are reserved for future idex calls to ease the hardcoding. |
| */ |
| const char *ide_words[] = { |
| "noprobe", "serialize", "autotune", "noautotune", "reset", "dma", "ata66", |
| "minus8", "minus9", "minus10", "minus11", |
| "qd65xx", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", NULL }; |
| hw = s[3] - '0'; |
| hwif = &ide_hwifs[hw]; |
| i = match_parm(&s[4], ide_words, vals, 3); |
| |
| /* |
| * Cryptic check to ensure chipset not already set for hwif: |
| */ |
| if (i > 0 || i <= -11) { /* is parameter a chipset name? */ |
| if (hwif->chipset != ide_unknown) |
| goto bad_option; /* chipset already specified */ |
| if (i <= -11 && i != -18 && hw != 0) |
| goto bad_hwif; /* chipset drivers are for "ide0=" only */ |
| if (i <= -11 && i != -18 && ide_hwifs[hw+1].chipset != ide_unknown) |
| goto bad_option; /* chipset for 2nd port already specified */ |
| printk("\n"); |
| } |
| |
| switch (i) { |
| #ifdef CONFIG_BLK_DEV_PDC4030 |
| case -18: /* "dc4030" */ |
| { |
| extern void init_pdc4030(void); |
| init_pdc4030(); |
| goto done; |
| } |
| #endif /* CONFIG_BLK_DEV_PDC4030 */ |
| #ifdef CONFIG_BLK_DEV_ALI14XX |
| case -17: /* "ali14xx" */ |
| { |
| extern void init_ali14xx (void); |
| init_ali14xx(); |
| goto done; |
| } |
| #endif /* CONFIG_BLK_DEV_ALI14XX */ |
| #ifdef CONFIG_BLK_DEV_UMC8672 |
| case -16: /* "umc8672" */ |
| { |
| extern void init_umc8672 (void); |
| init_umc8672(); |
| goto done; |
| } |
| #endif /* CONFIG_BLK_DEV_UMC8672 */ |
| #ifdef CONFIG_BLK_DEV_DTC2278 |
| case -15: /* "dtc2278" */ |
| { |
| extern void init_dtc2278 (void); |
| init_dtc2278(); |
| goto done; |
| } |
| #endif /* CONFIG_BLK_DEV_DTC2278 */ |
| #ifdef CONFIG_BLK_DEV_CMD640 |
| case -14: /* "cmd640_vlb" */ |
| { |
| extern int cmd640_vlb; /* flag for cmd640.c */ |
| cmd640_vlb = 1; |
| goto done; |
| } |
| #endif /* CONFIG_BLK_DEV_CMD640 */ |
| #ifdef CONFIG_BLK_DEV_HT6560B |
| case -13: /* "ht6560b" */ |
| { |
| extern void init_ht6560b (void); |
| init_ht6560b(); |
| goto done; |
| } |
| #endif /* CONFIG_BLK_DEV_HT6560B */ |
| #if CONFIG_BLK_DEV_QD65XX |
| case -12: /* "qd65xx" */ |
| { |
| extern void init_qd65xx (void); |
| init_qd65xx(); |
| goto done; |
| } |
| #endif /* CONFIG_BLK_DEV_QD65XX */ |
| case -11: /* minus11 */ |
| case -10: /* minus10 */ |
| case -9: /* minus9 */ |
| case -8: /* minus8 */ |
| goto bad_option; |
| case -7: /* ata66 */ |
| #ifdef CONFIG_BLK_DEV_IDEPCI |
| hwif->udma_four = 1; |
| goto done; |
| #else /* !CONFIG_BLK_DEV_IDEPCI */ |
| hwif->udma_four = 0; |
| goto bad_hwif; |
| #endif /* CONFIG_BLK_DEV_IDEPCI */ |
| case -6: /* dma */ |
| hwif->autodma = 1; |
| goto done; |
| case -5: /* "reset" */ |
| hwif->reset = 1; |
| goto done; |
| case -4: /* "noautotune" */ |
| hwif->drives[0].autotune = 2; |
| hwif->drives[1].autotune = 2; |
| goto done; |
| case -3: /* "autotune" */ |
| hwif->drives[0].autotune = 1; |
| hwif->drives[1].autotune = 1; |
| goto done; |
| case -2: /* "serialize" */ |
| do_serialize: |
| hwif->mate = &ide_hwifs[hw^1]; |
| hwif->mate->mate = hwif; |
| hwif->serialized = hwif->mate->serialized = 1; |
| goto done; |
| |
| case -1: /* "noprobe" */ |
| hwif->noprobe = 1; |
| goto done; |
| |
| case 1: /* base */ |
| vals[1] = vals[0] + 0x206; /* default ctl */ |
| case 2: /* base,ctl */ |
| vals[2] = 0; /* default irq = probe for it */ |
| case 3: /* base,ctl,irq */ |
| hwif->hw.irq = vals[2]; |
| ide_init_hwif_ports(&hwif->hw, (ide_ioreg_t) vals[0], (ide_ioreg_t) vals[1], &hwif->irq); |
| memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports)); |
| hwif->irq = vals[2]; |
| hwif->noprobe = 0; |
| hwif->chipset = ide_generic; |
| goto done; |
| |
| case 0: goto bad_option; |
| default: |
| printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); |
| return 1; |
| } |
| } |
| bad_option: |
| printk(" -- BAD OPTION\n"); |
| return 1; |
| bad_hwif: |
| printk("-- NOT SUPPORTED ON ide%d", hw); |
| done: |
| printk("\n"); |
| return 1; |
| } |
| |
| /* This is the default end request function as well */ |
| int ide_end_request(ide_drive_t *drive, int uptodate) |
| { |
| return __ide_end_request(drive, uptodate, 0); |
| } |
| |
| /* |
| * Lookup IDE devices, which requested a particular driver |
| */ |
| ide_drive_t *ide_scan_devices(byte type, const char *name, struct ata_operations *driver, int n) |
| { |
| unsigned int unit, index, i; |
| |
| for (index = 0, i = 0; index < MAX_HWIFS; ++index) { |
| ide_hwif_t *hwif = &ide_hwifs[index]; |
| if (!hwif->present) |
| continue; |
| for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| ide_drive_t *drive = &hwif->drives[unit]; |
| char *req = drive->driver_req; |
| if (*req && !strstr(name, req)) |
| continue; |
| if (drive->present && drive->type == type && drive->driver == driver && ++i > n) |
| return drive; |
| } |
| } |
| return NULL; |
| } |
| |
| /* |
| * This is in fact registering a drive not a driver. |
| */ |
| int ide_register_subdriver(ide_drive_t *drive, struct ata_operations *driver) |
| { |
| unsigned long flags; |
| |
| save_flags(flags); /* all CPUs */ |
| cli(); /* all CPUs */ |
| if (!drive->present || drive->driver != NULL || drive->busy || drive->usage) { |
| restore_flags(flags); /* all CPUs */ |
| return 1; |
| } |
| |
| /* FIXME: This will be pushed to the drivers! Thus allowing us to |
| * save one parameter here eparate this out. |
| */ |
| |
| drive->driver = driver; |
| |
| restore_flags(flags); /* all CPUs */ |
| /* FIXME: Check what this magic number is supposed to be about? */ |
| if (drive->autotune != 2) { |
| if (HWIF(drive)->dmaproc != NULL) { |
| |
| /* |
| * Force DMAing for the beginning of the check. Some |
| * chipsets appear to do interesting things, if not |
| * checked and cleared. |
| * |
| * PARANOIA!!! |
| */ |
| |
| HWIF(drive)->dmaproc(ide_dma_off_quietly, drive); |
| HWIF(drive)->dmaproc(ide_dma_check, drive); |
| } |
| /* Only CD-ROMs and tape drives support DSC overlap. */ |
| drive->dsc_overlap = (drive->next != drive |
| && (drive->type == ATA_ROM || drive->type == ATA_TAPE)); |
| drive->nice1 = 1; |
| } |
| drive->revalidate = 1; |
| drive->suspend_reset = 0; |
| #ifdef CONFIG_PROC_FS |
| ide_add_proc_entries(drive->proc, generic_subdriver_entries, drive); |
| if (ata_ops(drive)) |
| ide_add_proc_entries(drive->proc, ata_ops(drive)->proc, drive); |
| #endif |
| return 0; |
| } |
| |
| /* |
| * This is in fact the default cleanup routine. |
| * |
| * FIXME: Check whatever we maybe don't call it twice!. |
| */ |
| int ide_unregister_subdriver(ide_drive_t *drive) |
| { |
| unsigned long flags; |
| |
| save_flags(flags); /* all CPUs */ |
| cli(); /* all CPUs */ |
| if (drive->usage || drive->busy || !ata_ops(drive) || ata_ops(drive)->busy) { |
| restore_flags(flags); /* all CPUs */ |
| return 1; |
| } |
| #if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_ISAPNP) && defined(MODULE) |
| pnpide_init(0); |
| #endif |
| #ifdef CONFIG_PROC_FS |
| if (ata_ops(drive)) |
| ide_remove_proc_entries(drive->proc, ata_ops(drive)->proc); |
| ide_remove_proc_entries(drive->proc, generic_subdriver_entries); |
| #endif |
| auto_remove_settings(drive); |
| drive->driver = NULL; |
| restore_flags(flags); /* all CPUs */ |
| return 0; |
| } |
| |
| |
| /* |
| * Register an ATA driver for a particular device type. |
| */ |
| |
| int register_ata_driver(unsigned int type, struct ata_operations *driver) |
| { |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(register_ata_driver); |
| |
| /* |
| * Unregister an ATA driver for a particular device type. |
| */ |
| |
| int unregister_ata_driver(unsigned int type, struct ata_operations *driver) |
| { |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(unregister_ata_driver); |
| |
| struct block_device_operations ide_fops[] = {{ |
| owner: THIS_MODULE, |
| open: ide_open, |
| release: ide_release, |
| ioctl: ide_ioctl, |
| check_media_change: ide_check_media_change, |
| revalidate: ide_revalidate_disk |
| }}; |
| |
| EXPORT_SYMBOL(ide_hwifs); |
| EXPORT_SYMBOL(ide_spin_wait_hwgroup); |
| EXPORT_SYMBOL(revalidate_drives); |
| |
| /* |
| * Probe module |
| */ |
| devfs_handle_t ide_devfs_handle; |
| |
| EXPORT_SYMBOL(ide_lock); |
| EXPORT_SYMBOL(drive_is_flashcard); |
| EXPORT_SYMBOL(ide_timer_expiry); |
| EXPORT_SYMBOL(ide_intr); |
| EXPORT_SYMBOL(ide_get_queue); |
| EXPORT_SYMBOL(ide_add_generic_settings); |
| EXPORT_SYMBOL(do_ide_request); |
| /* |
| * Driver module |
| */ |
| EXPORT_SYMBOL(ide_scan_devices); |
| EXPORT_SYMBOL(ide_register_subdriver); |
| EXPORT_SYMBOL(ide_unregister_subdriver); |
| EXPORT_SYMBOL(ide_set_handler); |
| EXPORT_SYMBOL(ide_dump_status); |
| EXPORT_SYMBOL(ide_error); |
| EXPORT_SYMBOL(ide_fixstring); |
| EXPORT_SYMBOL(ide_wait_stat); |
| EXPORT_SYMBOL(ide_do_reset); |
| EXPORT_SYMBOL(restart_request); |
| EXPORT_SYMBOL(ide_init_drive_cmd); |
| EXPORT_SYMBOL(ide_do_drive_cmd); |
| EXPORT_SYMBOL(ide_end_drive_cmd); |
| EXPORT_SYMBOL(__ide_end_request); |
| EXPORT_SYMBOL(ide_end_request); |
| EXPORT_SYMBOL(ide_revalidate_disk); |
| EXPORT_SYMBOL(ide_cmd); |
| EXPORT_SYMBOL(ide_delay_50ms); |
| EXPORT_SYMBOL(ide_stall_queue); |
| #ifdef CONFIG_PROC_FS |
| EXPORT_SYMBOL(ide_add_proc_entries); |
| EXPORT_SYMBOL(ide_remove_proc_entries); |
| EXPORT_SYMBOL(proc_ide_read_geometry); |
| #endif |
| EXPORT_SYMBOL(ide_add_setting); |
| EXPORT_SYMBOL(ide_remove_setting); |
| |
| EXPORT_SYMBOL(ide_register_hw); |
| EXPORT_SYMBOL(ide_register); |
| EXPORT_SYMBOL(ide_unregister); |
| EXPORT_SYMBOL(ide_setup_ports); |
| EXPORT_SYMBOL(get_info_ptr); |
| |
| static int ide_notify_reboot (struct notifier_block *this, unsigned long event, void *x) |
| { |
| ide_hwif_t *hwif; |
| ide_drive_t *drive; |
| int i, unit; |
| |
| switch (event) { |
| case SYS_HALT: |
| case SYS_POWER_OFF: |
| case SYS_RESTART: |
| break; |
| default: |
| return NOTIFY_DONE; |
| } |
| |
| printk("flushing ide devices: "); |
| |
| for (i = 0; i < MAX_HWIFS; i++) { |
| hwif = &ide_hwifs[i]; |
| if (!hwif->present) |
| continue; |
| for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| drive = &hwif->drives[unit]; |
| if (!drive->present) |
| continue; |
| |
| /* set the drive to standby */ |
| printk("%s ", drive->name); |
| if (ata_ops(drive)) { |
| if (event != SYS_RESTART) |
| if (ata_ops(drive)->standby && ata_ops(drive)->standby(drive)) |
| continue; |
| |
| if (ata_ops(drive)->cleanup) |
| ata_ops(drive)->cleanup(drive); |
| } |
| } |
| } |
| printk("\n"); |
| return NOTIFY_DONE; |
| } |
| |
| static struct notifier_block ide_notifier = { |
| ide_notify_reboot, |
| NULL, |
| 5 |
| }; |
| |
| /* |
| * This is the global initialization entry point. |
| */ |
| static int __init ata_module_init(void) |
| { |
| int i; |
| |
| printk(KERN_INFO "Uniform Multi-Platform E-IDE driver ver.:" VERSION "\n"); |
| |
| ide_devfs_handle = devfs_mk_dir (NULL, "ide", NULL); |
| |
| /* Initialize system bus speed. |
| * |
| * This can be changed by a particular chipse initialization module. |
| * Otherwise we assume 33MHz as a safe value for PCI bus based systems. |
| * 50MHz will be assumed for abolitions like VESA, since higher values |
| * result in more conservative timing setups. |
| * |
| * The kernel parameter idebus=XX overrides the default settings. |
| */ |
| |
| system_bus_speed = 50; |
| if (idebus_parameter) |
| system_bus_speed = idebus_parameter; |
| #ifdef CONFIG_PCI |
| else if (pci_present()) |
| system_bus_speed = 33; |
| #endif |
| |
| printk("ide: system bus speed %dMHz\n", system_bus_speed); |
| |
| init_ide_data (); |
| |
| initializing = 1; |
| |
| /* |
| * Detect and initialize "known" IDE host chip types. |
| */ |
| #ifdef CONFIG_PCI |
| if (pci_present()) { |
| # ifdef CONFIG_BLK_DEV_IDEPCI |
| ide_scan_pcibus(ide_scan_direction); |
| # else |
| # ifdef CONFIG_BLK_DEV_RZ1000 |
| ide_probe_for_rz100x(); |
| # endif |
| # endif |
| } |
| #endif |
| |
| #ifdef CONFIG_ETRAX_IDE |
| init_e100_ide(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_CMD640 |
| ide_probe_for_cmd640x(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_PDC4030 |
| ide_probe_for_pdc4030(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDE_PMAC |
| pmac_ide_probe(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDE_ICSIDE |
| icside_init(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDE_RAPIDE |
| rapide_init(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_GAYLE |
| gayle_init(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_FALCON_IDE |
| falconide_init(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_MAC_IDE |
| macide_init(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_Q40IDE |
| q40ide_init(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_BUDDHA |
| buddha_init(); |
| #endif |
| #if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_ISAPNP) |
| pnpide_init(1); |
| #endif |
| |
| #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULES) |
| # if defined(__mc68000__) || defined(CONFIG_APUS) |
| if (ide_hwifs[0].io_ports[IDE_DATA_OFFSET]) { |
| ide_get_lock(&ide_intr_lock, NULL, NULL);/* for atari only */ |
| disable_irq(ide_hwifs[0].irq); /* disable_irq_nosync ?? */ |
| // disable_irq_nosync(ide_hwifs[0].irq); |
| } |
| # endif |
| |
| ideprobe_init(); |
| |
| # if defined(__mc68000__) || defined(CONFIG_APUS) |
| if (ide_hwifs[0].io_ports[IDE_DATA_OFFSET]) { |
| enable_irq(ide_hwifs[0].irq); |
| ide_release_lock(&ide_intr_lock);/* for atari only */ |
| } |
| # endif |
| #endif |
| |
| #ifdef CONFIG_PROC_FS |
| proc_ide_create(); |
| #endif |
| |
| /* |
| * Initialize all device type driver modules. |
| */ |
| #ifdef CONFIG_BLK_DEV_IDEDISK |
| idedisk_init(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDECD |
| ide_cdrom_init(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDETAPE |
| idetape_init(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDEFLOPPY |
| idefloppy_init(); |
| #endif |
| #ifdef CONFIG_BLK_DEV_IDESCSI |
| # ifdef CONFIG_SCSI |
| idescsi_init(); |
| # else |
| #warning ATA SCSI emulation selected but no SCSI-subsystem in kernel |
| # endif |
| #endif |
| |
| initializing = 0; |
| |
| for (i = 0; i < MAX_HWIFS; ++i) { |
| ide_hwif_t *hwif = &ide_hwifs[i]; |
| if (hwif->present) |
| ide_geninit(hwif); |
| } |
| |
| register_reboot_notifier(&ide_notifier); |
| return 0; |
| } |
| |
| static char *options = NULL; |
| MODULE_PARM(options,"s"); |
| MODULE_LICENSE("GPL"); |
| |
| static void __init parse_options (char *line) |
| { |
| char *next = line; |
| |
| if (line == NULL || !*line) |
| return; |
| while ((line = next) != NULL) { |
| if ((next = strchr(line,' ')) != NULL) |
| *next++ = 0; |
| if (!ide_setup(line)) |
| printk ("Unknown option '%s'\n", line); |
| } |
| } |
| |
| static int __init init_ata (void) |
| { |
| parse_options(options); |
| return ata_module_init(); |
| } |
| |
| static void __exit cleanup_ata (void) |
| { |
| int index; |
| |
| unregister_reboot_notifier(&ide_notifier); |
| for (index = 0; index < MAX_HWIFS; ++index) { |
| ide_unregister(index); |
| # if defined(CONFIG_BLK_DEV_IDEDMA) && !defined(CONFIG_DMA_NONPCI) |
| if (ide_hwifs[index].dma_base) |
| ide_release_dma(&ide_hwifs[index]); |
| # endif /* (CONFIG_BLK_DEV_IDEDMA) && !(CONFIG_DMA_NONPCI) */ |
| } |
| |
| # ifdef CONFIG_PROC_FS |
| proc_ide_destroy(); |
| # endif |
| devfs_unregister (ide_devfs_handle); |
| } |
| |
| module_init(init_ata); |
| module_exit(cleanup_ata); |
| |
| #ifndef MODULE |
| |
| /* command line option parser */ |
| __setup("", ide_setup); |
| |
| #endif |