/* * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) * Copyrifht (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz */ /* * Mostly written by Mark Lord * and Gadi Oxman * and Andre Hedrick * * 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. * * ... * * 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 */ #define _IDE_C /* Tell ide.h it's really us */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* default maximum number of failures */ #define IDE_DEFAULT_MAX_FAILURES 1 struct class *ide_port_class; static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; static int idebus_parameter; /* holds the "idebus=" parameter */ static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ DEFINE_MUTEX(ide_cfg_mtx); __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); int noautodma = 0; ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ static void ide_port_init_devices_data(ide_hwif_t *); /* * Do not even *think* about calling this! */ void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) { /* bulk initialize hwif & drive info with zeros */ memset(hwif, 0, sizeof(ide_hwif_t)); /* fill in any non-zero initial values */ hwif->index = index; hwif->major = ide_hwif_to_major[index]; hwif->name[0] = 'i'; hwif->name[1] = 'd'; hwif->name[2] = 'e'; hwif->name[3] = '0' + index; hwif->bus_state = BUSSTATE_ON; init_completion(&hwif->gendev_rel_comp); default_hwif_iops(hwif); default_hwif_transport(hwif); ide_port_init_devices_data(hwif); } EXPORT_SYMBOL_GPL(ide_init_port_data); static void ide_port_init_devices_data(ide_hwif_t *hwif) { int unit; for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; u8 j = (hwif->index * MAX_DRIVES) + unit; memset(drive, 0, sizeof(*drive)); drive->media = ide_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; drive->name[0] = 'h'; drive->name[1] = 'd'; drive->name[2] = 'a' + j; drive->max_failures = IDE_DEFAULT_MAX_FAILURES; INIT_LIST_HEAD(&drive->list); init_completion(&drive->gendev_rel_comp); } } /* * 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. * * FIXME: We should stuff the setup data into __init and copy the * relevant hwifs/allocate them properly during boot. */ #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; /* Initialise all interface structures */ for (index = 0; index < MAX_HWIFS; ++index) { ide_hwif_t *hwif = &ide_hwifs[index]; ide_init_port_data(hwif, index); } } /** * ide_system_bus_speed - guess bus speed * * ide_system_bus_speed() returns what we think is the system VESA/PCI * bus speed (in MHz). This is used for calculating interface PIO timings. * The default is 40 for known PCI systems, 50 otherwise. * The "idebus=xx" parameter can be used to override this value. * The actual value to be used is computed/displayed the first time * through. Drivers should only use this as a last resort. * * Returns a guessed speed in MHz. */ static int ide_system_bus_speed(void) { #ifdef CONFIG_PCI static struct pci_device_id pci_default[] = { { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, { } }; #else #define pci_default 0 #endif /* CONFIG_PCI */ /* user supplied value */ if (idebus_parameter) return idebus_parameter; /* safe default value for PCI or VESA and PCI*/ return pci_dev_present(pci_default) ? 33 : 50; } void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) { ide_hwgroup_t *hwgroup = hwif->hwgroup; spin_lock_irq(&ide_lock); /* * Remove us from the hwgroup, and free * the hwgroup if we were the only member */ if (hwif->next == hwif) { BUG_ON(hwgroup->hwif != hwif); kfree(hwgroup); } else { /* There is another interface in hwgroup. * Unlink us, and set hwgroup->drive and ->hwif to * something sane. */ ide_hwif_t *g = hwgroup->hwif; while (g->next != hwif) g = g->next; g->next = hwif->next; if (hwgroup->hwif == hwif) { /* Chose a random hwif for hwgroup->hwif. * It's guaranteed that there are no drives * left in the hwgroup. */ BUG_ON(hwgroup->drive != NULL); hwgroup->hwif = g; } BUG_ON(hwgroup->hwif == hwif); } spin_unlock_irq(&ide_lock); } /* Called with ide_lock held. */ static void __ide_port_unregister_devices(ide_hwif_t *hwif) { int i; for (i = 0; i < MAX_DRIVES; i++) { ide_drive_t *drive = &hwif->drives[i]; if (drive->present) { spin_unlock_irq(&ide_lock); device_unregister(&drive->gendev); wait_for_completion(&drive->gendev_rel_comp); spin_lock_irq(&ide_lock); } } } void ide_port_unregister_devices(ide_hwif_t *hwif) { mutex_lock(&ide_cfg_mtx); spin_lock_irq(&ide_lock); __ide_port_unregister_devices(hwif); hwif->present = 0; ide_port_init_devices_data(hwif); spin_unlock_irq(&ide_lock); mutex_unlock(&ide_cfg_mtx); } EXPORT_SYMBOL_GPL(ide_port_unregister_devices); /** * ide_unregister - free an IDE interface * @hwif: IDE interface * * Perform the final unregister of an IDE interface. At the moment * we don't refcount interfaces so this will also get split up. * * Locking: * The caller must not hold the IDE locks * The drive present/vanishing is not yet properly locked * Take care with the callbacks. These have been split to avoid * deadlocking the IDE layer. The shutdown callback is called * before we take the lock and free resources. It is up to the * caller to be sure there is no pending I/O here, and that * the interface will not be reopened (present/vanishing locking * isn't yet done BTW). After we commit to the final kill we * call the cleanup callback with the ide locks held. * * Unregister restores the hwif structures to the default state. * This is raving bonkers. */ void ide_unregister(ide_hwif_t *hwif) { ide_hwif_t *g; ide_hwgroup_t *hwgroup; int irq_count = 0; BUG_ON(in_interrupt()); BUG_ON(irqs_disabled()); mutex_lock(&ide_cfg_mtx); spin_lock_irq(&ide_lock); if (!hwif->present) goto abort; __ide_port_unregister_devices(hwif); hwif->present = 0; spin_unlock_irq(&ide_lock); ide_proc_unregister_port(hwif); 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); ide_remove_port_from_hwgroup(hwif); device_unregister(hwif->portdev); device_unregister(&hwif->gendev); wait_for_completion(&hwif->gendev_rel_comp); /* * Remove us from the kernel's knowledge */ blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<sg_table); unregister_blkdev(hwif->major, hwif->name); spin_lock_irq(&ide_lock); if (hwif->dma_base) ide_release_dma_engine(hwif); /* restore hwif data to pristine status */ ide_init_port_data(hwif, hwif->index); abort: spin_unlock_irq(&ide_lock); mutex_unlock(&ide_cfg_mtx); } EXPORT_SYMBOL(ide_unregister); void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) { memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); hwif->irq = hw->irq; hwif->chipset = hw->chipset; hwif->gendev.parent = hw->dev; hwif->ack_intr = hw->ack_intr; } EXPORT_SYMBOL_GPL(ide_init_port_hw); /* * Locks for IDE setting functionality */ DEFINE_MUTEX(ide_setting_mtx); EXPORT_SYMBOL_GPL(ide_setting_mtx); /** * ide_spin_wait_hwgroup - wait for group * @drive: drive in the group * * Wait for an IDE device group to go non busy and then return * holding the ide_lock which guards the hwgroup->busy status * and right to use it. */ 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 (hwgroup->busy) { unsigned long lflags; spin_unlock_irq(&ide_lock); local_irq_set(lflags); if (time_after(jiffies, timeout)) { local_irq_restore(lflags); printk(KERN_ERR "%s: channel busy\n", drive->name); return -EBUSY; } local_irq_restore(lflags); spin_lock_irq(&ide_lock); } return 0; } EXPORT_SYMBOL(ide_spin_wait_hwgroup); int set_io_32bit(ide_drive_t *drive, int arg) { if (drive->no_io_32bit) return -EPERM; if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) return -EINVAL; if (ide_spin_wait_hwgroup(drive)) return -EBUSY; drive->io_32bit = arg; spin_unlock_irq(&ide_lock); return 0; } static int set_ksettings(ide_drive_t *drive, int arg) { if (arg < 0 || arg > 1) return -EINVAL; if (ide_spin_wait_hwgroup(drive)) return -EBUSY; drive->keep_settings = arg; spin_unlock_irq(&ide_lock); return 0; } int set_using_dma(ide_drive_t *drive, int arg) { #ifdef CONFIG_BLK_DEV_IDEDMA ide_hwif_t *hwif = drive->hwif; int err = -EPERM; if (arg < 0 || arg > 1) return -EINVAL; if (!drive->id || !(drive->id->capability & 1)) goto out; if (hwif->dma_ops == NULL) goto out; err = -EBUSY; if (ide_spin_wait_hwgroup(drive)) goto out; /* * set ->busy flag, unlock and let it ride */ hwif->hwgroup->busy = 1; spin_unlock_irq(&ide_lock); err = 0; if (arg) { if (ide_set_dma(drive)) err = -EIO; } else ide_dma_off(drive); /* * lock, clear ->busy flag and unlock before leaving */ spin_lock_irq(&ide_lock); hwif->hwgroup->busy = 0; spin_unlock_irq(&ide_lock); out: return err; #else if (arg < 0 || arg > 1) return -EINVAL; return -EPERM; #endif } int set_pio_mode(ide_drive_t *drive, int arg) { struct request rq; ide_hwif_t *hwif = drive->hwif; const struct ide_port_ops *port_ops = hwif->port_ops; if (arg < 0 || arg > 255) return -EINVAL; if (port_ops == NULL || port_ops->set_pio_mode == NULL || (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) return -ENOSYS; if (drive->special.b.set_tune) return -EBUSY; ide_init_drive_cmd(&rq); rq.cmd_type = REQ_TYPE_ATA_TASKFILE; drive->tune_req = (u8) arg; drive->special.b.set_tune = 1; (void) ide_do_drive_cmd(drive, &rq, ide_wait); return 0; } static int set_unmaskirq(ide_drive_t *drive, int arg) { if (drive->no_unmask) return -EPERM; if (arg < 0 || arg > 1) return -EINVAL; if (ide_spin_wait_hwgroup(drive)) return -EBUSY; drive->unmask = arg; spin_unlock_irq(&ide_lock); return 0; } /** * system_bus_clock - clock guess * * External version of the bus clock guess used by very old IDE drivers * for things like VLB timings. Should not be used. */ int system_bus_clock (void) { return system_bus_speed; } EXPORT_SYMBOL(system_bus_clock); static int generic_ide_suspend(struct device *dev, pm_message_t mesg) { ide_drive_t *drive = dev->driver_data; ide_hwif_t *hwif = HWIF(drive); struct request rq; struct request_pm_state rqpm; ide_task_t args; int ret; /* Call ACPI _GTM only once */ if (!(drive->dn % 2)) ide_acpi_get_timing(hwif); blk_rq_init(NULL, &rq); memset(&rqpm, 0, sizeof(rqpm)); memset(&args, 0, sizeof(args)); rq.cmd_type = REQ_TYPE_PM_SUSPEND; rq.special = &args; rq.data = &rqpm; rqpm.pm_step = ide_pm_state_start_suspend; if (mesg.event == PM_EVENT_PRETHAW) mesg.event = PM_EVENT_FREEZE; rqpm.pm_state = mesg.event; ret = ide_do_drive_cmd(drive, &rq, ide_wait); /* only call ACPI _PS3 after both drivers are suspended */ if (!ret && (((drive->dn % 2) && hwif->drives[0].present && hwif->drives[1].present) || !hwif->drives[0].present || !hwif->drives[1].present)) ide_acpi_set_state(hwif, 0); return ret; } static int generic_ide_resume(struct device *dev) { ide_drive_t *drive = dev->driver_data; ide_hwif_t *hwif = HWIF(drive); struct request rq; struct request_pm_state rqpm; ide_task_t args; int err; /* Call ACPI _STM only once */ if (!(drive->dn % 2)) { ide_acpi_set_state(hwif, 1); ide_acpi_push_timing(hwif); } ide_acpi_exec_tfs(drive); blk_rq_init(NULL, &rq); memset(&rqpm, 0, sizeof(rqpm)); memset(&args, 0, sizeof(args)); rq.cmd_type = REQ_TYPE_PM_RESUME; rq.special = &args; rq.data = &rqpm; rqpm.pm_step = ide_pm_state_start_resume; rqpm.pm_state = PM_EVENT_ON; err = ide_do_drive_cmd(drive, &rq, ide_head_wait); if (err == 0 && dev->driver) { ide_driver_t *drv = to_ide_driver(dev->driver); if (drv->resume) drv->resume(drive); } return err; } int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, unsigned int cmd, unsigned long arg) { unsigned long flags; ide_driver_t *drv; void __user *p = (void __user *)arg; int err = 0, (*setfunc)(ide_drive_t *, int); u8 *val; switch (cmd) { case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val; case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val; case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val; case HDIO_GET_DMA: val = &drive->using_dma; goto read_val; case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val; case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val; case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val; case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val; case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val; } switch (cmd) { case HDIO_OBSOLETE_IDENTITY: case HDIO_GET_IDENTITY: if (bdev != bdev->bd_contains) return -EINVAL; if (drive->id_read == 0) return -ENOMSG; if (copy_to_user(p, 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->nice1 << IDE_NICE_1, (long __user *) arg); #ifdef CONFIG_IDE_TASK_IOCTL case HDIO_DRIVE_TASKFILE: if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES; switch(drive->media) { case ide_disk: return ide_taskfile_ioctl(drive, cmd, arg); default: return -ENOMSG; } #endif /* CONFIG_IDE_TASK_IOCTL */ case HDIO_DRIVE_CMD: if (!capable(CAP_SYS_RAWIO)) return -EACCES; return ide_cmd_ioctl(drive, cmd, arg); case HDIO_DRIVE_TASK: if (!capable(CAP_SYS_RAWIO)) return -EACCES; return ide_task_ioctl(drive, cmd, arg); 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; drv = *(ide_driver_t **)bdev->bd_disk->private_data; if (drive->dsc_overlap && !drv->supports_dsc_overlap) { drive->dsc_overlap = 0; return -EPERM; } drive->nice1 = (arg >> IDE_NICE_1) & 1; return 0; case HDIO_DRIVE_RESET: if (!capable(CAP_SYS_ADMIN)) return -EACCES; /* * Abort the current command on the * group if there is one, taking * care not to allow anything else * to be queued and to die on the * spot if we miss one somehow */ spin_lock_irqsave(&ide_lock, flags); if (HWGROUP(drive)->resetting) { spin_unlock_irqrestore(&ide_lock, flags); return -EBUSY; } ide_abort(drive, "drive reset"); BUG_ON(HWGROUP(drive)->handler); /* Ensure nothing gets queued after we drop the lock. Reset will clear the busy */ HWGROUP(drive)->busy = 1; spin_unlock_irqrestore(&ide_lock, flags); (void) ide_do_reset(drive); return 0; case HDIO_GET_BUSSTATE: if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) return -EFAULT; return 0; case HDIO_SET_BUSSTATE: if (!capable(CAP_SYS_ADMIN)) return -EACCES; return -EOPNOTSUPP; default: return -EINVAL; } read_val: mutex_lock(&ide_setting_mtx); spin_lock_irqsave(&ide_lock, flags); err = *val; spin_unlock_irqrestore(&ide_lock, flags); mutex_unlock(&ide_setting_mtx); return err >= 0 ? put_user(err, (long __user *)arg) : err; set_val: if (bdev != bdev->bd_contains) err = -EINVAL; else { if (!capable(CAP_SYS_ADMIN)) err = -EACCES; else { mutex_lock(&ide_setting_mtx); err = setfunc(drive, arg); mutex_unlock(&ide_setting_mtx); } } return err; } EXPORT_SYMBOL(generic_ide_ioctl); /* * 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 */ } /* * ide_setup() gets called VERY EARLY during initialization, * to handle kernel "command line" strings beginning with "hdx=" or "ide". * * Remember to update Documentation/ide/ide.txt if you change something here. */ static int __init ide_setup(char *s) { ide_hwif_t *hwif; ide_drive_t *drive; unsigned int hw, unit; int vals[3]; const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ return 0; /* driver and not us */ if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) return 0; printk(KERN_INFO "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; goto obsolete_option; } #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ if (!strcmp(s, "ide=nodma")) { printk(" : Prevented DMA\n"); noautodma = 1; goto obsolete_option; } #ifdef CONFIG_BLK_DEV_IDEACPI if (!strcmp(s, "ide=noacpi")) { //printk(" : Disable IDE ACPI support.\n"); ide_noacpi = 1; goto obsolete_option; } if (!strcmp(s, "ide=acpigtf")) { //printk(" : Enable IDE ACPI _GTF support.\n"); ide_acpigtf = 1; goto obsolete_option; } if (!strcmp(s, "ide=acpionboot")) { //printk(" : Call IDE ACPI methods on boot.\n"); ide_acpionboot = 1; goto obsolete_option; } #endif /* CONFIG_BLK_DEV_IDEACPI */ /* * 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", "nodma", "-6", "-7", "-8", "-9", "-10", "noflush", "remap", "remap63", "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) { strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); goto obsolete_option; } switch (match_parm(&s[3], hd_words, vals, 3)) { case -1: /* "none" */ case -2: /* "noprobe" */ drive->noprobe = 1; goto obsolete_option; case -3: /* "nowerr" */ drive->bad_wstat = BAD_R_STAT; goto obsolete_option; case -4: /* "cdrom" */ drive->present = 1; drive->media = ide_cdrom; /* an ATAPI device ignores DRDY */ drive->ready_stat = 0; goto obsolete_option; case -5: /* nodma */ drive->nodma = 1; goto obsolete_option; case -11: /* noflush */ drive->noflush = 1; goto obsolete_option; case -12: /* "remap" */ drive->remap_0_to_1 = 1; goto obsolete_option; case -13: /* "remap63" */ drive->sect0 = 63; goto obsolete_option; case -14: /* "scsi" */ drive->scsi = 1; goto obsolete_option; case 3: /* cyl,head,sect */ drive->media = ide_disk; drive->ready_stat = READY_STAT; 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; goto obsolete_option; 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 obsolete_option; } bad_option: printk(" -- BAD OPTION\n"); return 1; obsolete_option: printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); return 1; } EXPORT_SYMBOL(ide_lock); static int ide_bus_match(struct device *dev, struct device_driver *drv) { return 1; } static char *media_string(ide_drive_t *drive) { switch (drive->media) { case ide_disk: return "disk"; case ide_cdrom: return "cdrom"; case ide_tape: return "tape"; case ide_floppy: return "floppy"; case ide_optical: return "optical"; default: return "UNKNOWN"; } } static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) { ide_drive_t *drive = to_ide_device(dev); return sprintf(buf, "%s\n", media_string(drive)); } static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) { ide_drive_t *drive = to_ide_device(dev); return sprintf(buf, "%s\n", drive->name); } static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { ide_drive_t *drive = to_ide_device(dev); return sprintf(buf, "ide:m-%s\n", media_string(drive)); } static ssize_t model_show(struct device *dev, struct device_attribute *attr, char *buf) { ide_drive_t *drive = to_ide_device(dev); return sprintf(buf, "%s\n", drive->id->model); } static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, char *buf) { ide_drive_t *drive = to_ide_device(dev); return sprintf(buf, "%s\n", drive->id->fw_rev); } static ssize_t serial_show(struct device *dev, struct device_attribute *attr, char *buf) { ide_drive_t *drive = to_ide_device(dev); return sprintf(buf, "%s\n", drive->id->serial_no); } static struct device_attribute ide_dev_attrs[] = { __ATTR_RO(media), __ATTR_RO(drivename), __ATTR_RO(modalias), __ATTR_RO(model), __ATTR_RO(firmware), __ATTR(serial, 0400, serial_show, NULL), __ATTR_NULL }; static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) { ide_drive_t *drive = to_ide_device(dev); add_uevent_var(env, "MEDIA=%s", media_string(drive)); add_uevent_var(env, "DRIVENAME=%s", drive->name); add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); return 0; } static int generic_ide_probe(struct device *dev) { ide_drive_t *drive = to_ide_device(dev); ide_driver_t *drv = to_ide_driver(dev->driver); return drv->probe ? drv->probe(drive) : -ENODEV; } static int generic_ide_remove(struct device *dev) { ide_drive_t *drive = to_ide_device(dev); ide_driver_t *drv = to_ide_driver(dev->driver); if (drv->remove) drv->remove(drive); return 0; } static void generic_ide_shutdown(struct device *dev) { ide_drive_t *drive = to_ide_device(dev); ide_driver_t *drv = to_ide_driver(dev->driver); if (dev->driver && drv->shutdown) drv->shutdown(drive); } struct bus_type ide_bus_type = { .name = "ide", .match = ide_bus_match, .uevent = ide_uevent, .probe = generic_ide_probe, .remove = generic_ide_remove, .shutdown = generic_ide_shutdown, .dev_attrs = ide_dev_attrs, .suspend = generic_ide_suspend, .resume = generic_ide_resume, }; EXPORT_SYMBOL_GPL(ide_bus_type); static void ide_port_class_release(struct device *portdev) { ide_hwif_t *hwif = dev_get_drvdata(portdev); put_device(&hwif->gendev); } int ide_vlb_clk; EXPORT_SYMBOL_GPL(ide_vlb_clk); module_param_named(vlb_clock, ide_vlb_clk, int, 0); MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); int ide_pci_clk; EXPORT_SYMBOL_GPL(ide_pci_clk); module_param_named(pci_clock, ide_pci_clk, int, 0); MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) { int a, b, i, j = 1; unsigned int *dev_param_mask = (unsigned int *)kp->arg; if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && sscanf(s, "%d.%d", &a, &b) != 2) return -EINVAL; i = a * MAX_DRIVES + b; if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) return -EINVAL; if (j) *dev_param_mask |= (1 << i); else *dev_param_mask &= (1 << i); return 0; } static unsigned int ide_nodma; module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); MODULE_PARM_DESC(nodma, "disallow DMA for a device"); static unsigned int ide_noflush; module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); MODULE_PARM_DESC(noflush, "disable flush requests for a device"); static unsigned int ide_noprobe; module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); MODULE_PARM_DESC(noprobe, "skip probing for a device"); static unsigned int ide_nowerr; module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device"); static unsigned int ide_cdroms; module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); struct chs_geom { unsigned int cyl; u8 head; u8 sect; }; static unsigned int ide_disks; static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; static int ide_set_disk_chs(const char *str, struct kernel_param *kp) { int a, b, c = 0, h = 0, s = 0, i, j = 1; if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) return -EINVAL; i = a * MAX_DRIVES + b; if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) return -EINVAL; if (c > INT_MAX || h > 255 || s > 255) return -EINVAL; if (j) ide_disks |= (1 << i); else ide_disks &= (1 << i); ide_disks_chs[i].cyl = c; ide_disks_chs[i].head = h; ide_disks_chs[i].sect = s; return 0; } module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); static void ide_dev_apply_params(ide_drive_t *drive) { int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit; if (ide_nodma & (1 << i)) { printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); drive->nodma = 1; } if (ide_noflush & (1 << i)) { printk(KERN_INFO "ide: disabling flush requests for %s\n", drive->name); drive->noflush = 1; } if (ide_noprobe & (1 << i)) { printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); drive->noprobe = 1; } if (ide_nowerr & (1 << i)) { printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n", drive->name); drive->bad_wstat = BAD_R_STAT; } if (ide_cdroms & (1 << i)) { printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); drive->present = 1; drive->media = ide_cdrom; /* an ATAPI device ignores DRDY */ drive->ready_stat = 0; } if (ide_disks & (1 << i)) { drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; drive->head = drive->bios_head = ide_disks_chs[i].head; drive->sect = drive->bios_sect = ide_disks_chs[i].sect; drive->forced_geom = 1; printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", drive->name, drive->cyl, drive->head, drive->sect); drive->present = 1; drive->media = ide_disk; drive->ready_stat = READY_STAT; } } static unsigned int ide_ignore_cable; static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) { int i, j = 1; if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) return -EINVAL; if (i >= MAX_HWIFS || j < 0 || j > 1) return -EINVAL; if (j) ide_ignore_cable |= (1 << i); else ide_ignore_cable &= (1 << i); return 0; } module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); void ide_port_apply_params(ide_hwif_t *hwif) { int i; if (ide_ignore_cable & (1 << hwif->index)) { printk(KERN_INFO "ide: ignoring cable detection for %s\n", hwif->name); hwif->cbl = ATA_CBL_PATA40_SHORT; } for (i = 0; i < MAX_DRIVES; i++) ide_dev_apply_params(&hwif->drives[i]); } /* * This is gets invoked once during initialization, to set *everything* up */ static int __init ide_init(void) { int ret; printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); system_bus_speed = ide_system_bus_speed(); printk(KERN_INFO "ide: Assuming %dMHz system bus speed " "for PIO modes%s\n", system_bus_speed, idebus_parameter ? "" : "; override with idebus=xx"); ret = bus_register(&ide_bus_type); if (ret < 0) { printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); return ret; } ide_port_class = class_create(THIS_MODULE, "ide_port"); if (IS_ERR(ide_port_class)) { ret = PTR_ERR(ide_port_class); goto out_port_class; } ide_port_class->dev_release = ide_port_class_release; init_ide_data(); proc_ide_create(); return 0; out_port_class: bus_unregister(&ide_bus_type); return ret; } #ifdef MODULE static char *options = NULL; module_param(options, charp, 0); 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 (KERN_INFO "Unknown option '%s'\n", line); } } int __init init_module (void) { parse_options(options); return ide_init(); } void __exit cleanup_module (void) { proc_ide_destroy(); class_destroy(ide_port_class); bus_unregister(&ide_bus_type); } #else /* !MODULE */ __setup("", ide_setup); module_init(ide_init); #endif /* MODULE */