/* * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003 * * 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 7.00alpha First named revision of ide rearrange * * Some additional driver compile-time options are in ./include/linux/ide.h * * To do, in likely order of completion: * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f * */ #define REVISION "Revision: 7.00alpha2" #define VERSION "Id: ide.c 7.00a2 20020906" #undef REALLY_SLOW_IO /* most systems can safely undef this */ #define _IDE_C /* Tell ide.h it's really us */ #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> #include <linux/init.h> #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/seq_file.h> #include <linux/device.h> #include <asm/byteorder.h> #include <asm/irq.h> #include <asm/uaccess.h> #include <asm/io.h> #include <asm/bitops.h> /* default maximum number of failures */ #define IDE_DEFAULT_MAX_FAILURES 1 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 */ static int initializing; /* set while initializing built-in drivers */ DECLARE_MUTEX(ide_cfg_sem); spinlock_t ide_lock __cacheline_aligned_in_smp = SPIN_LOCK_UNLOCKED; #ifdef CONFIG_BLK_DEV_IDEPCI static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */ #endif #ifdef CONFIG_IDEDMA_AUTO int noautodma = 0; #else int noautodma = 1; #endif EXPORT_SYMBOL(noautodma); /* * This is declared extern in ide.h, for access by other IDE modules: */ ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ EXPORT_SYMBOL(ide_hwifs); extern ide_driver_t idedefault_driver; static void setup_driver_defaults(ide_driver_t *driver); /* * Do not even *think* about calling this! */ static void init_hwif_data(ide_hwif_t *hwif, unsigned int index) { unsigned int unit; /* 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; hwif->atapi_dma = 0; /* disable all atapi dma */ hwif->ultra_mask = 0x80; /* disable all ultra */ hwif->mwdma_mask = 0x80; /* disable all mwdma */ hwif->swdma_mask = 0x80; /* disable all swdma */ sema_init(&hwif->gendev_rel_sem, 0); default_hwif_iops(hwif); default_hwif_transport(hwif); for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; 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' + (index * MAX_DRIVES) + unit; drive->max_failures = IDE_DEFAULT_MAX_FAILURES; drive->using_dma = 0; drive->is_flash = 0; drive->driver = &idedefault_driver; drive->vdma = 0; INIT_LIST_HEAD(&drive->list); sema_init(&drive->gendev_rel_sem, 0); } } static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) { hw_regs_t hw; memset(&hw, 0, sizeof(hw_regs_t)); 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 } extern void ide_arm_init(void); /* * 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) { ide_hwif_t *hwif; unsigned int index; static unsigned long magic_cookie = MAGIC_COOKIE; if (magic_cookie != MAGIC_COOKIE) return; /* already initialized */ magic_cookie = 0; setup_driver_defaults(&idedefault_driver); /* Initialise all interface structures */ for (index = 0; index < MAX_HWIFS; ++index) { hwif = &ide_hwifs[index]; init_hwif_data(hwif, index); init_hwif_default(hwif, index); #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) hwif->irq = hwif->hw.irq = ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); #endif } #ifdef CONFIG_IDE_ARM initializing = 1; ide_arm_init(); initializing = 0; #endif } /* * 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. */ int ide_system_bus_speed (void) { if (!system_bus_speed) { if (idebus_parameter) { /* user supplied value */ system_bus_speed = idebus_parameter; } else if (pci_find_device(PCI_ANY_ID, PCI_ANY_ID, NULL) != NULL) { /* safe default value for PCI */ system_bus_speed = 33; } else { /* safe default value for VESA and PCI */ system_bus_speed = 50; } printk(KERN_INFO "ide: Assuming %dMHz system bus speed " "for PIO modes%s\n", system_bus_speed, idebus_parameter ? "" : "; override with idebus=xx"); } return system_bus_speed; } /* * current_capacity() returns the capacity (in sectors) of a drive * according to its current geometry/LBA settings. */ sector_t current_capacity (ide_drive_t *drive) { if (!drive->present) return 0; return DRIVER(drive)->capacity(drive); } EXPORT_SYMBOL(current_capacity); /* * Error reporting, in human readable form (luxurious, but a memory hog). */ u8 ide_dump_status (ide_drive_t *drive, const char *msg, u8 stat) { ide_hwif_t *hwif = HWIF(drive); unsigned long flags; u8 err = 0; local_irq_set(flags); printk(KERN_WARNING "%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 = hwif->INB(IDE_ERROR_REG); printk("%s: %s: error=0x%02x", drive->name, msg, err); #if FANCY_STATUS_DUMPS if (drive->media == ide_disk) { printk(" { "); if (err & ABRT_ERR) printk("DriveStatusError "); if (err & ICRC_ERR) printk("Bad%s ", (err & ABRT_ERR) ? "CRC" : "Sector"); 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 high = 0; u32 low = ide_read_24(drive); hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG); high = ide_read_24(drive); sectors = ((u64)high << 24) | low; printk(", LBAsect=%llu, high=%d, low=%d", (long long) sectors, high, low); } else { u8 cur = hwif->INB(IDE_SELECT_REG); if (cur & 0x40) { /* using LBA? */ printk(", LBAsect=%ld", (unsigned long) ((cur&0xf)<<24) |(hwif->INB(IDE_HCYL_REG)<<16) |(hwif->INB(IDE_LCYL_REG)<<8) | hwif->INB(IDE_SECTOR_REG)); } else { printk(", CHS=%d/%d/%d", (hwif->INB(IDE_HCYL_REG)<<8) + hwif->INB(IDE_LCYL_REG), cur & 0xf, hwif->INB(IDE_SECTOR_REG)); } } if (HWGROUP(drive) && HWGROUP(drive)->rq) printk(", sector=%llu", (unsigned long long)HWGROUP(drive)->rq->sector); } } #endif /* FANCY_STATUS_DUMPS */ printk("\n"); } { struct request *rq; int opcode = 0x100; spin_lock(&ide_lock); rq = NULL; if (HWGROUP(drive)) rq = HWGROUP(drive)->rq; spin_unlock(&ide_lock); if (!rq) goto out; if (rq->flags & (REQ_DRIVE_CMD | REQ_DRIVE_TASK)) { char *args = rq->buffer; if (args) opcode = args[0]; } else if (rq->flags & REQ_DRIVE_TASKFILE) { ide_task_t *args = rq->special; if (args) { task_struct_t *tf = (task_struct_t *) args->tfRegister; opcode = tf->command; } } printk("ide: failed opcode was %x\n", opcode); } out: local_irq_restore(flags); return err; } EXPORT_SYMBOL(ide_dump_status); static int ide_open (struct inode * inode, struct file * filp) { return -ENXIO; } static spinlock_t drives_lock = SPIN_LOCK_UNLOCKED; static spinlock_t drivers_lock = SPIN_LOCK_UNLOCKED; static LIST_HEAD(drivers); /* Iterator */ static void *m_start(struct seq_file *m, loff_t *pos) { struct list_head *p; loff_t l = *pos; spin_lock(&drivers_lock); list_for_each(p, &drivers) if (!l--) return list_entry(p, ide_driver_t, drivers); return NULL; } static void *m_next(struct seq_file *m, void *v, loff_t *pos) { struct list_head *p = ((ide_driver_t *)v)->drivers.next; (*pos)++; return p==&drivers ? NULL : list_entry(p, ide_driver_t, drivers); } static void m_stop(struct seq_file *m, void *v) { spin_unlock(&drivers_lock); } static int show_driver(struct seq_file *m, void *v) { ide_driver_t *driver = v; seq_printf(m, "%s version %s\n", driver->name, driver->version); return 0; } struct seq_operations ide_drivers_op = { .start = m_start, .next = m_next, .stop = m_stop, .show = show_driver }; #ifdef CONFIG_PROC_FS struct proc_dir_entry *proc_ide_root; ide_proc_entry_t generic_subdriver_entries[] = { { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL }, { NULL, 0, NULL, NULL } }; #endif static struct resource* hwif_request_region(ide_hwif_t *hwif, unsigned long addr, int num) { struct resource *res = request_region(addr, num, hwif->name); if (!res) printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", hwif->name, addr, addr+num-1); return res; } /** * ide_hwif_request_regions - request resources for IDE * @hwif: interface to use * * Requests all the needed resources for an interface. * Right now core IDE code does this work which is deeply wrong. * MMIO leaves it to the controller driver, * PIO will migrate this way over time. */ int ide_hwif_request_regions(ide_hwif_t *hwif) { unsigned long addr; unsigned int i; if (hwif->mmio == 2) return 0; BUG_ON(hwif->mmio == 1); addr = hwif->io_ports[IDE_CONTROL_OFFSET]; if (addr && !hwif_request_region(hwif, addr, 1)) goto control_region_busy; hwif->straight8 = 0; addr = hwif->io_ports[IDE_DATA_OFFSET]; if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { if (!hwif_request_region(hwif, addr, 8)) goto data_region_busy; hwif->straight8 = 1; return 0; } for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { addr = hwif->io_ports[i]; if (!hwif_request_region(hwif, addr, 1)) { while (--i) release_region(addr, 1); goto data_region_busy; } } return 0; data_region_busy: addr = hwif->io_ports[IDE_CONTROL_OFFSET]; if (addr) release_region(addr, 1); control_region_busy: /* If any errors are return, we drop the hwif interface. */ return -EBUSY; } /** * ide_hwif_release_regions - free IDE resources * * Note that we only release the standard ports, * and do not even try to handle any extra ports * allocated for weird IDE interface chipsets. * * Note also that we don't yet handle mmio resources here. More * importantly our caller should be doing this so we need to * restructure this as a helper function for drivers. */ void ide_hwif_release_regions(ide_hwif_t *hwif) { u32 i = 0; if (hwif->mmio == 2) return; if (hwif->io_ports[IDE_CONTROL_OFFSET]) release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); if (hwif->straight8) { release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); return; } for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) if (hwif->io_ports[i]) release_region(hwif->io_ports[i], 1); } /* restore hwif to a sane state */ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) { hwif->hwgroup = tmp_hwif->hwgroup; hwif->gendev.parent = tmp_hwif->gendev.parent; hwif->proc = tmp_hwif->proc; hwif->major = tmp_hwif->major; hwif->straight8 = tmp_hwif->straight8; hwif->bus_state = tmp_hwif->bus_state; hwif->atapi_dma = tmp_hwif->atapi_dma; hwif->ultra_mask = tmp_hwif->ultra_mask; hwif->mwdma_mask = tmp_hwif->mwdma_mask; hwif->swdma_mask = tmp_hwif->swdma_mask; hwif->chipset = tmp_hwif->chipset; hwif->hold = tmp_hwif->hold; #ifdef CONFIG_BLK_DEV_IDEPCI hwif->pci_dev = tmp_hwif->pci_dev; hwif->cds = tmp_hwif->cds; #endif hwif->identify = tmp_hwif->identify; hwif->tuneproc = tmp_hwif->tuneproc; hwif->speedproc = tmp_hwif->speedproc; hwif->selectproc = tmp_hwif->selectproc; hwif->reset_poll = tmp_hwif->reset_poll; hwif->pre_reset = tmp_hwif->pre_reset; hwif->resetproc = tmp_hwif->resetproc; hwif->intrproc = tmp_hwif->intrproc; hwif->maskproc = tmp_hwif->maskproc; hwif->quirkproc = tmp_hwif->quirkproc; hwif->busproc = tmp_hwif->busproc; hwif->ata_input_data = tmp_hwif->ata_input_data; hwif->ata_output_data = tmp_hwif->ata_output_data; hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; hwif->ide_dma_read = tmp_hwif->ide_dma_read; hwif->ide_dma_write = tmp_hwif->ide_dma_write; hwif->ide_dma_begin = tmp_hwif->ide_dma_begin; hwif->ide_dma_end = tmp_hwif->ide_dma_end; hwif->ide_dma_check = tmp_hwif->ide_dma_check; hwif->ide_dma_on = tmp_hwif->ide_dma_on; hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly; hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on; hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off; hwif->ide_dma_verbose = tmp_hwif->ide_dma_verbose; hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq; hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout; hwif->OUTB = tmp_hwif->OUTB; hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; hwif->OUTW = tmp_hwif->OUTW; hwif->OUTL = tmp_hwif->OUTL; hwif->OUTSW = tmp_hwif->OUTSW; hwif->OUTSL = tmp_hwif->OUTSL; hwif->INB = tmp_hwif->INB; hwif->INW = tmp_hwif->INW; hwif->INL = tmp_hwif->INL; hwif->INSW = tmp_hwif->INSW; hwif->INSL = tmp_hwif->INSL; hwif->mmio = tmp_hwif->mmio; hwif->rqsize = tmp_hwif->rqsize; hwif->no_lba48 = tmp_hwif->no_lba48; #ifndef CONFIG_BLK_DEV_IDECS hwif->irq = tmp_hwif->irq; #endif hwif->dma_base = tmp_hwif->dma_base; hwif->dma_master = tmp_hwif->dma_master; hwif->dma_command = tmp_hwif->dma_command; hwif->dma_vendor1 = tmp_hwif->dma_vendor1; hwif->dma_status = tmp_hwif->dma_status; hwif->dma_vendor3 = tmp_hwif->dma_vendor3; hwif->dma_prdtable = tmp_hwif->dma_prdtable; hwif->dma_extra = tmp_hwif->dma_extra; hwif->config_data = tmp_hwif->config_data; hwif->select_data = tmp_hwif->select_data; hwif->autodma = tmp_hwif->autodma; hwif->udma_four = tmp_hwif->udma_four; hwif->no_dsc = tmp_hwif->no_dsc; hwif->hwif_data = tmp_hwif->hwif_data; } /** * ide_unregister - free an ide interface * @index: index of interface (will change soon to a pointer) * * 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 interfce will not be reopened (present/vanishing locking * isnt 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(unsigned int index) { ide_drive_t *drive; ide_hwif_t *hwif, *g, *tmp_hwif; ide_hwgroup_t *hwgroup; int irq_count = 0, unit, i; BUG_ON(index >= MAX_HWIFS); tmp_hwif = kmalloc(sizeof(*tmp_hwif), GFP_KERNEL|__GFP_NOFAIL); if (!tmp_hwif) { printk(KERN_ERR "%s: unable to allocate memory\n", __FUNCTION__); return; } BUG_ON(in_interrupt()); BUG_ON(irqs_disabled()); down(&ide_cfg_sem); spin_lock_irq(&ide_lock); hwif = &ide_hwifs[index]; if (!hwif->present) goto abort; for (unit = 0; unit < MAX_DRIVES; ++unit) { drive = &hwif->drives[unit]; if (!drive->present) continue; if (drive->usage || DRIVER(drive)->busy) goto abort; drive->dead = 1; } hwif->present = 0; spin_unlock_irq(&ide_lock); for (unit = 0; unit < MAX_DRIVES; ++unit) { drive = &hwif->drives[unit]; if (!drive->present) continue; DRIVER(drive)->cleanup(drive); } #ifdef CONFIG_PROC_FS destroy_proc_ide_drives(hwif); #endif 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); spin_lock_irq(&ide_lock); /* * Note that we only release the standard ports, * and do not even try to handle any extra ports * allocated for weird IDE interface chipsets. */ ide_hwif_release_regions(hwif); /* * Remove us from the hwgroup, and free * the hwgroup if we were the only member */ for (i = 0; i < MAX_DRIVES; ++i) { drive = &hwif->drives[i]; if (drive->devfs_name[0] != '\0') { devfs_remove(drive->devfs_name); drive->devfs_name[0] = '\0'; } if (!drive->present) continue; if (drive == drive->next) { /* special case: last drive from hwgroup. */ BUG_ON(hwgroup->drive != drive); hwgroup->drive = NULL; } else { ide_drive_t *walk; walk = hwgroup->drive; while (walk->next != drive) walk = walk->next; walk->next = drive->next; if (hwgroup->drive == drive) { hwgroup->drive = drive->next; hwgroup->hwif = HWIF(hwgroup->drive); } } BUG_ON(hwgroup->drive == drive); if (drive->id != NULL) { kfree(drive->id); drive->id = NULL; } drive->present = 0; /* Messed up locking ... */ spin_unlock_irq(&ide_lock); blk_cleanup_queue(drive->queue); device_unregister(&drive->gendev); down(&drive->gendev_rel_sem); spin_lock_irq(&ide_lock); drive->queue = NULL; } 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. */ 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); } /* More messed up locking ... */ spin_unlock_irq(&ide_lock); device_unregister(&hwif->gendev); down(&hwif->gendev_rel_sem); /* * Remove us from the kernel's knowledge */ blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); for (i = 0; i < MAX_DRIVES; i++) { struct gendisk *disk = hwif->drives[i].disk; hwif->drives[i].disk = NULL; put_disk(disk); } unregister_blkdev(hwif->major, hwif->name); spin_lock_irq(&ide_lock); if (hwif->dma_base) { (void) ide_release_dma(hwif); hwif->dma_base = 0; hwif->dma_master = 0; hwif->dma_command = 0; hwif->dma_vendor1 = 0; hwif->dma_status = 0; hwif->dma_vendor3 = 0; hwif->dma_prdtable = 0; } /* copy original settings */ *tmp_hwif = *hwif; /* restore hwif data to pristine status */ init_hwif_data(hwif, index); init_hwif_default(hwif, index); ide_hwif_restore(hwif, tmp_hwif); abort: spin_unlock_irq(&ide_lock); up(&ide_cfg_sem); kfree(tmp_hwif); } EXPORT_SYMBOL(ide_unregister); /** * ide_setup_ports - set up IDE interface ports * @hw: register descriptions * @base: base register * @offsets: table of register offsets * @ctrl: control register * @ack_irq: IRQ ack * @irq: interrupt lie * * 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. This is basically a helper * */ void ide_setup_ports ( hw_regs_t *hw, unsigned long base, int *offsets, unsigned long ctrl, unsigned long intr, ide_ack_intr_t *ack_intr, /* * ide_io_ops_t *iops, */ 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; /* * hw->iops = iops; */ } /* * Register an IDE interface, specifying 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->hold) continue; 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); else if (!hwif->hold) { init_hwif_data(hwif, index); init_hwif_default(hwif, 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) { probe_hwif_init(hwif); create_proc_ide_interfaces(); } if (hwifp) *hwifp = hwif; return (initializing || hwif->present) ? index : -1; } EXPORT_SYMBOL(ide_register_hw); /* * Locks for IDE setting functionality */ DECLARE_MUTEX(ide_setting_sem); /** * ide_add_setting - add an ide setting option * @drive: drive to use * @name: setting name * @rw: true if the function is read write * @read_ioctl: function to call on read * @write_ioctl: function to call on write * @data_type: type of data * @min: range minimum * @max: range maximum * @mul_factor: multiplication scale * @div_factor: divison scale * @data: private data field * @set: setting * * Removes the setting named from the device if it is present. * The function takes the settings_lock to protect against * parallel changes. This function must not be called from IRQ * context. Returns 0 on success or -1 on failure. * * BUGS: This code is seriously over-engineered. There is also * magic about how the driver specific features are setup. If * a driver is attached we assume the driver settings are auto * remove. */ int ide_add_setting (ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set) { ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL; down(&ide_setting_sem); 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 != &idedefault_driver) setting->auto_remove = 1; *p = setting; up(&ide_setting_sem); return 0; abort: up(&ide_setting_sem); if (setting) kfree(setting); return -1; } EXPORT_SYMBOL(ide_add_setting); /** * __ide_remove_setting - remove an ide setting option * @drive: drive to use * @name: setting name * * Removes the setting named from the device if it is present. * The caller must hold the setting semaphore. */ static void __ide_remove_setting (ide_drive_t *drive, char *name) { ide_settings_t **p, *setting; p = (ide_settings_t **) &drive->settings; while ((*p) && strcmp((*p)->name, name)) p = &((*p)->next); if ((setting = (*p)) == NULL) return; (*p) = setting->next; kfree(setting->name); kfree(setting); } /** * ide_find_setting_by_ioctl - find a drive specific ioctl * @drive: drive to scan * @cmd: ioctl command to handle * * Scan's the device setting table for a matching entry and returns * this or NULL if no entry is found. The caller must hold the * setting semaphore */ static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd) { ide_settings_t *setting = drive->settings; while (setting) { if (setting->read_ioctl == cmd || setting->write_ioctl == cmd) break; setting = setting->next; } return setting; } /** * ide_find_setting_by_name - find a drive specific setting * @drive: drive to scan * @name: setting name * * Scan's the device setting table for a matching entry and returns * this or NULL if no entry is found. The caller must hold the * setting semaphore */ ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name) { ide_settings_t *setting = drive->settings; while (setting) { if (strcmp(setting->name, name) == 0) break; setting = setting->next; } return setting; } /** * auto_remove_settings - remove driver specific settings * @drive: drive * * Automatically remove all the driver specific settings for this * drive. This function may sleep and must not be called from IRQ * context. The caller must hold ide_setting_sem. */ 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; } } /** * ide_read_setting - read an IDE setting * @drive: drive to read from * @setting: drive setting * * Read a drive setting and return the value. The caller * must hold the ide_setting_sem when making this call. * * BUGS: the data return and error are the same return value * so an error -EINVAL and true return of the same value cannot * be told apart */ 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 (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); /** * ide_write_setting - read an IDE setting * @drive: drive to read from * @setting: drive setting * @val: value * * Write a drive setting if it is possible. The caller * must hold the ide_setting_sem when making this call. * * BUGS: the data return and error are the same return value * so an error -EINVAL and true return of the same value cannot * be told apart * * FIXME: This should be changed to enqueue a special request * to the driver to change settings, and then wait on a sema for completion. * The current scheme of polling is kludgy, 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) { #ifdef CONFIG_BLK_DEV_IDEDMA if (!drive->id || !(drive->id->capability & 1)) return -EPERM; if (HWIF(drive)->ide_dma_check == NULL) return -EPERM; if (arg) { if (HWIF(drive)->ide_dma_check(drive)) return -EIO; if (HWIF(drive)->ide_dma_on(drive)) return -EIO; } else { if (__ide_dma_off(drive)) return -EIO; } return 0; #else return -EPERM; #endif } 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 = (u8) arg; drive->special.b.set_tune = 1; (void) ide_do_drive_cmd(drive, &rq, ide_wait); return 0; } static int set_xfer_rate (ide_drive_t *drive, int arg) { int err = ide_wait_cmd(drive, WIN_SETFEATURES, (u8) arg, SETFEATURES_XFER, 0, NULL); if (!err && arg) { ide_set_xfer_rate(drive, (u8) arg); ide_driveid_update(drive); } return err; } 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, "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, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL); ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate); ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL); } int system_bus_clock (void) { return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed )); } EXPORT_SYMBOL(system_bus_clock); /* * Locking is badly broken here - since way back. That sucker is * root-only, but that's not an excuse... The real question is what * exclusion rules do we want here. */ int ide_replace_subdriver (ide_drive_t *drive, const char *driver) { if (!drive->present || drive->usage || drive->dead) goto abort; if (DRIVER(drive)->cleanup(drive)) goto abort; strlcpy(drive->driver_req, driver, sizeof(drive->driver_req)); if (ata_attach(drive)) { spin_lock(&drives_lock); list_del_init(&drive->list); spin_unlock(&drives_lock); drive->driver_req[0] = 0; ata_attach(drive); } else { drive->driver_req[0] = 0; } if (DRIVER(drive)!= &idedefault_driver && !strcmp(DRIVER(drive)->name, driver)) return 0; abort: return 1; } int ata_attach(ide_drive_t *drive) { struct list_head *p; spin_lock(&drivers_lock); list_for_each(p, &drivers) { ide_driver_t *driver = list_entry(p, ide_driver_t, drivers); if (!try_module_get(driver->owner)) continue; spin_unlock(&drivers_lock); if (driver->attach(drive) == 0) { module_put(driver->owner); drive->gendev.driver = &driver->gen_driver; return 0; } spin_lock(&drivers_lock); module_put(driver->owner); } drive->gendev.driver = &idedefault_driver.gen_driver; spin_unlock(&drivers_lock); if(idedefault_driver.attach(drive) != 0) panic("ide: default attach failed"); return 1; } static int generic_ide_suspend(struct device *dev, u32 state) { ide_drive_t *drive = dev->driver_data; struct request rq; struct request_pm_state rqpm; ide_task_t args; memset(&rq, 0, sizeof(rq)); memset(&rqpm, 0, sizeof(rqpm)); memset(&args, 0, sizeof(args)); rq.flags = REQ_PM_SUSPEND; rq.special = &args; rq.pm = &rqpm; rqpm.pm_step = ide_pm_state_start_suspend; rqpm.pm_state = state; return ide_do_drive_cmd(drive, &rq, ide_wait); } static int generic_ide_resume(struct device *dev) { ide_drive_t *drive = dev->driver_data; struct request rq; struct request_pm_state rqpm; ide_task_t args; memset(&rq, 0, sizeof(rq)); memset(&rqpm, 0, sizeof(rqpm)); memset(&args, 0, sizeof(args)); rq.flags = REQ_PM_RESUME; rq.special = &args; rq.pm = &rqpm; rqpm.pm_step = ide_pm_state_start_resume; rqpm.pm_state = 0; return ide_do_drive_cmd(drive, &rq, ide_head_wait); } int generic_ide_ioctl(struct file *file, struct block_device *bdev, unsigned int cmd, unsigned long arg) { ide_drive_t *drive = bdev->bd_disk->private_data; ide_settings_t *setting; int err = 0; void __user *p = (void __user *)arg; down(&ide_setting_sem); if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) { if (cmd == setting->read_ioctl) { err = ide_read_setting(drive, setting); up(&ide_setting_sem); return err >= 0 ? put_user(err, (long __user *)arg) : err; } else { if (bdev != bdev->bd_contains) err = -EINVAL; else err = ide_write_setting(drive, setting, arg); up(&ide_setting_sem); return err; } } up(&ide_setting_sem); switch (cmd) { case HDIO_GETGEO: { struct hd_geometry geom; if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL; geom.heads = drive->bios_head; geom.sectors = drive->bios_sect; geom.cylinders = (u16)drive->bios_cyl; /* truncate */ geom.start = get_start_sect(bdev); if (copy_to_user(p, &geom, sizeof(struct hd_geometry))) return -EFAULT; return 0; } 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->nice0 << IDE_NICE_0 | drive->nice1 << IDE_NICE_1 | drive->nice2 << IDE_NICE_2, (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_SCAN_HWIF: { hw_regs_t hw; int args[3]; if (!capable(CAP_SYS_RAWIO)) return -EACCES; if (copy_from_user(args, p, 3 * sizeof(int))) return -EFAULT; memset(&hw, 0, sizeof(hw)); ide_init_hwif_ports(&hw, (unsigned long) args[0], (unsigned long) args[1], NULL); hw.irq = args[2]; if (ide_register_hw(&hw, NULL) == -1) return -EIO; return 0; } case HDIO_UNREGISTER_HWIF: if (!capable(CAP_SYS_RAWIO)) 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; if (drive->dsc_overlap && !DRIVER(drive)->supports_dsc_overlap) { drive->dsc_overlap = 0; return -EPERM; } drive->nice1 = (arg >> IDE_NICE_1) & 1; return 0; case HDIO_DRIVE_RESET: { unsigned long flags; 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); DRIVER(drive)->abort(drive, "drive reset"); if(HWGROUP(drive)->handler) BUG(); /* 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); if (drive->suspend_reset) { /* * APM WAKE UP todo !! * int nogoodpower = 1; * while(nogoodpower) { * check_power1() or check_power2() * nogoodpower = 0; * } * HWIF(drive)->multiproc(drive); */ return ioctl_by_bdev(bdev, BLKRRPART, 0); } return 0; } case CDROMEJECT: case CDROMCLOSETRAY: return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p); 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; if (HWIF(drive)->busproc) return HWIF(drive)->busproc(drive, (int)arg); return -EOPNOTSUPP; default: return -EINVAL; } } 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 */ } #ifdef CONFIG_BLK_DEV_PDC4030 static int __initdata probe_pdc4030; #endif #ifdef CONFIG_BLK_DEV_ALI14XX static int __initdata probe_ali14xx; extern int ali14xx_init(void); #endif #ifdef CONFIG_BLK_DEV_UMC8672 static int __initdata probe_umc8672; extern int umc8672_init(void); #endif #ifdef CONFIG_BLK_DEV_DTC2278 static int __initdata probe_dtc2278; extern int dtc2278_init(void); #endif #ifdef CONFIG_BLK_DEV_HT6560B static int __initdata probe_ht6560b; extern int ht6560b_init(void); #endif #ifdef CONFIG_BLK_DEV_QD65XX static int __initdata probe_qd65xx; extern int qd65xx_init(void); #endif static int __initdata is_chipset_set[MAX_HWIFS]; /* * ide_setup() gets called VERY EARLY during initialization, * to handle kernel "command line" strings beginning with "hdx=" or "ide". * * Remember to update Documentation/ide.txt if you change something here. */ 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",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; return 1; } #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 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", "stroke", "swapdata", "bswap", "minus11", "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 done; } switch (match_parm(&s[3], hd_words, vals, 3)) { case -1: /* "none" */ 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->media = ide_cdrom; hwif->noprobe = 0; goto done; case -5: /* "serialize" */ printk(" -- USE \"ide%d=serialize\" INSTEAD", hw); goto do_serialize; case -6: /* "autotune" */ drive->autotune = IDE_TUNE_AUTO; goto done; case -7: /* "noautotune" */ drive->autotune = IDE_TUNE_NOAUTO; goto done; case -8: /* stroke */ drive->stroke = 1; goto done; case -9: /* "swapdata" */ case -10: /* "bswap" */ drive->bswap = 1; goto done; case -12: /* "remap" */ drive->remap_0_to_1 = 1; goto done; case -13: /* "remap63" */ drive->sect0 = 63; goto done; case -14: /* "scsi" */ drive->scsi = 1; goto done; case 3: /* cyl,head,sect */ drive->media = ide_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 to ease the hardcoding. */ static const char *ide_words[] = { "noprobe", "serialize", "autotune", "noautotune", "reset", "dma", "ata66", "minus8", "minus9", "minus10", "four", "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. * Note: we can't depend on hwif->chipset here. */ if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { /* chipset already specified */ if (is_chipset_set[hw]) goto bad_option; if (i > -18 && i <= -11) { /* these drivers are for "ide0=" only */ if (hw != 0) goto bad_hwif; /* chipset already specified for 2nd port */ if (is_chipset_set[hw+1]) goto bad_option; } is_chipset_set[hw] = 1; printk("\n"); } switch (i) { #ifdef CONFIG_BLK_DEV_PDC4030 case -18: /* "dc4030" */ probe_pdc4030 = 1; goto done; #endif #ifdef CONFIG_BLK_DEV_ALI14XX case -17: /* "ali14xx" */ probe_ali14xx = 1; goto done; #endif #ifdef CONFIG_BLK_DEV_UMC8672 case -16: /* "umc8672" */ probe_umc8672 = 1; goto done; #endif #ifdef CONFIG_BLK_DEV_DTC2278 case -15: /* "dtc2278" */ probe_dtc2278 = 1; goto done; #endif #ifdef CONFIG_BLK_DEV_CMD640 case -14: /* "cmd640_vlb" */ { extern int cmd640_vlb; /* flag for cmd640.c */ cmd640_vlb = 1; goto done; } #endif #ifdef CONFIG_BLK_DEV_HT6560B case -13: /* "ht6560b" */ probe_ht6560b = 1; goto done; #endif #ifdef CONFIG_BLK_DEV_QD65XX case -12: /* "qd65xx" */ probe_qd65xx = 1; goto done; #endif #ifdef CONFIG_BLK_DEV_4DRIVES case -11: /* "four" drives on one set of ports */ { ide_hwif_t *mate = &ide_hwifs[hw^1]; mate->drives[0].select.all ^= 0x20; mate->drives[1].select.all ^= 0x20; hwif->chipset = mate->chipset = ide_4drives; mate->irq = hwif->irq; memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); goto do_serialize; } #endif /* CONFIG_BLK_DEV_4DRIVES */ 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 goto bad_hwif; #endif case -6: /* dma */ hwif->autodma = 1; goto done; case -5: /* "reset" */ hwif->reset = 1; goto done; case -4: /* "noautotune" */ hwif->drives[0].autotune = IDE_TUNE_NOAUTO; hwif->drives[1].autotune = IDE_TUNE_NOAUTO; goto done; case -3: /* "autotune" */ hwif->drives[0].autotune = IDE_TUNE_AUTO; hwif->drives[1].autotune = IDE_TUNE_AUTO; 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, (unsigned long) vals[0], (unsigned long) 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_forced; 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; } extern void pnpide_init(void); extern void h8300_ide_init(void); /* * probe_for_hwifs() finds/initializes "known" IDE interfaces */ static void __init probe_for_hwifs (void) { #ifdef CONFIG_BLK_DEV_IDEPCI ide_scan_pcibus(ide_scan_direction); #endif /* CONFIG_BLK_DEV_IDEPCI */ #ifdef CONFIG_ETRAX_IDE { extern void init_e100_ide(void); init_e100_ide(); } #endif /* CONFIG_ETRAX_IDE */ #ifdef CONFIG_BLK_DEV_CMD640 { extern void ide_probe_for_cmd640x(void); ide_probe_for_cmd640x(); } #endif /* CONFIG_BLK_DEV_CMD640 */ #ifdef CONFIG_BLK_DEV_PDC4030 { extern int pdc4030_init(void); if (probe_pdc4030) (void)pdc4030_init(); } #endif /* CONFIG_BLK_DEV_PDC4030 */ #ifdef CONFIG_BLK_DEV_IDE_PMAC { extern void pmac_ide_probe(void); pmac_ide_probe(); } #endif /* CONFIG_BLK_DEV_IDE_PMAC */ #ifdef CONFIG_BLK_DEV_GAYLE { extern void gayle_init(void); gayle_init(); } #endif /* CONFIG_BLK_DEV_GAYLE */ #ifdef CONFIG_BLK_DEV_FALCON_IDE { extern void falconide_init(void); falconide_init(); } #endif /* CONFIG_BLK_DEV_FALCON_IDE */ #ifdef CONFIG_BLK_DEV_MAC_IDE { extern void macide_init(void); macide_init(); } #endif /* CONFIG_BLK_DEV_MAC_IDE */ #ifdef CONFIG_BLK_DEV_Q40IDE { extern void q40ide_init(void); q40ide_init(); } #endif /* CONFIG_BLK_DEV_Q40IDE */ #ifdef CONFIG_BLK_DEV_BUDDHA { extern void buddha_init(void); buddha_init(); } #endif /* CONFIG_BLK_DEV_BUDDHA */ #ifdef CONFIG_BLK_DEV_IDEPNP pnpide_init(); #endif #ifdef CONFIG_H8300 h8300_ide_init(); #endif } /* * Actually unregister the subdriver. Called with the * request lock dropped. */ static int default_cleanup (ide_drive_t *drive) { return ide_unregister_subdriver(drive); } static ide_startstop_t default_do_request (ide_drive_t *drive, struct request *rq, sector_t block) { ide_end_request(drive, 0, 0); return ide_stopped; } static int default_end_request (ide_drive_t *drive, int uptodate, int nr_sects) { return ide_end_request(drive, uptodate, nr_sects); } static u8 default_sense (ide_drive_t *drive, const char *msg, u8 stat) { return ide_dump_status(drive, msg, stat); } static ide_startstop_t default_error (ide_drive_t *drive, const char *msg, u8 stat) { return ide_error(drive, msg, stat); } static void default_pre_reset (ide_drive_t *drive) { } static sector_t default_capacity (ide_drive_t *drive) { return 0x7fffffff; } static ide_startstop_t default_special (ide_drive_t *drive) { special_t *s = &drive->special; s->all = 0; drive->mult_req = 0; return ide_stopped; } static int default_attach (ide_drive_t *drive) { printk(KERN_ERR "%s: does not support hotswap of device class !\n", drive->name); return 0; } static ide_startstop_t default_abort (ide_drive_t *drive, const char *msg) { return ide_abort(drive, msg); } static ide_startstop_t default_start_power_step(ide_drive_t *drive, struct request *rq) { rq->pm->pm_step = ide_pm_state_completed; return ide_stopped; } static void setup_driver_defaults (ide_driver_t *d) { if (d->cleanup == NULL) d->cleanup = default_cleanup; if (d->do_request == NULL) d->do_request = default_do_request; if (d->end_request == NULL) d->end_request = default_end_request; if (d->sense == NULL) d->sense = default_sense; if (d->error == NULL) d->error = default_error; if (d->abort == NULL) d->abort = default_abort; if (d->pre_reset == NULL) d->pre_reset = default_pre_reset; if (d->capacity == NULL) d->capacity = default_capacity; if (d->special == NULL) d->special = default_special; if (d->attach == NULL) d->attach = default_attach; if (d->start_power_step == NULL) d->start_power_step = default_start_power_step; } int ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver) { unsigned long flags; BUG_ON(!drive->driver); spin_lock_irqsave(&ide_lock, flags); if (!drive->present || drive->driver != &idedefault_driver || drive->usage || drive->dead) { spin_unlock_irqrestore(&ide_lock, flags); return 1; } drive->driver = driver; spin_unlock_irqrestore(&ide_lock, flags); spin_lock(&drives_lock); list_add_tail(&drive->list, &driver->drives); spin_unlock(&drives_lock); // printk(KERN_INFO "%s: attached %s driver.\n", drive->name, driver->name); if ((drive->autotune == IDE_TUNE_DEFAULT) || (drive->autotune == IDE_TUNE_AUTO)) { /* DMA timings and setup moved to ide-probe.c */ drive->dsc_overlap = (drive->next != drive && driver->supports_dsc_overlap); drive->nice1 = 1; } drive->suspend_reset = 0; #ifdef CONFIG_PROC_FS if (drive->driver != &idedefault_driver) { ide_add_proc_entries(drive->proc, generic_subdriver_entries, drive); ide_add_proc_entries(drive->proc, driver->proc, drive); } #endif return 0; } EXPORT_SYMBOL(ide_register_subdriver); int ide_unregister_subdriver (ide_drive_t *drive) { unsigned long flags; down(&ide_setting_sem); spin_lock_irqsave(&ide_lock, flags); if (drive->usage || drive->driver == &idedefault_driver || DRIVER(drive)->busy) { spin_unlock_irqrestore(&ide_lock, flags); up(&ide_setting_sem); return 1; } #ifdef CONFIG_PROC_FS ide_remove_proc_entries(drive->proc, DRIVER(drive)->proc); ide_remove_proc_entries(drive->proc, generic_subdriver_entries); #endif auto_remove_settings(drive); drive->driver = &idedefault_driver; spin_unlock_irqrestore(&ide_lock, flags); up(&ide_setting_sem); spin_lock(&drives_lock); list_del_init(&drive->list); spin_unlock(&drives_lock); /* drive will be added to &idedefault_driver->drives in ata_attach() */ return 0; } EXPORT_SYMBOL(ide_unregister_subdriver); static int ide_drive_remove(struct device * dev) { ide_drive_t * drive = container_of(dev,ide_drive_t,gendev); DRIVER(drive)->cleanup(drive); return 0; } int ide_register_driver(ide_driver_t *driver) { struct list_head list; struct list_head *list_loop; struct list_head *tmp_storage; setup_driver_defaults(driver); spin_lock(&drivers_lock); list_add(&driver->drivers, &drivers); spin_unlock(&drivers_lock); INIT_LIST_HEAD(&list); spin_lock(&drives_lock); list_splice_init(&idedefault_driver.drives, &list); spin_unlock(&drives_lock); list_for_each_safe(list_loop, tmp_storage, &list) { ide_drive_t *drive = container_of(list_loop, ide_drive_t, list); list_del_init(&drive->list); if (drive->present) ata_attach(drive); } driver->gen_driver.name = (char *) driver->name; driver->gen_driver.bus = &ide_bus_type; driver->gen_driver.remove = ide_drive_remove; return driver_register(&driver->gen_driver); } EXPORT_SYMBOL(ide_register_driver); void ide_unregister_driver(ide_driver_t *driver) { ide_drive_t *drive; spin_lock(&drivers_lock); list_del(&driver->drivers); spin_unlock(&drivers_lock); driver_unregister(&driver->gen_driver); while(!list_empty(&driver->drives)) { drive = list_entry(driver->drives.next, ide_drive_t, list); if (driver->cleanup(drive)) { printk(KERN_ERR "%s: cleanup_module() called while still busy\n", drive->name); BUG(); } ata_attach(drive); } } EXPORT_SYMBOL(ide_unregister_driver); struct block_device_operations ide_fops[] = {{ .owner = THIS_MODULE, .open = ide_open, }}; EXPORT_SYMBOL(ide_fops); /* * Probe module */ EXPORT_SYMBOL(ide_lock); struct bus_type ide_bus_type = { .name = "ide", .suspend = generic_ide_suspend, .resume = generic_ide_resume, }; /* * This is gets invoked once during initialization, to set *everything* up */ int __init ide_init (void) { printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n"); devfs_mk_dir("ide"); system_bus_speed = ide_system_bus_speed(); bus_register(&ide_bus_type); init_ide_data(); #ifdef CONFIG_PROC_FS proc_ide_root = proc_mkdir("ide", NULL); #endif #ifdef CONFIG_BLK_DEV_ALI14XX if (probe_ali14xx) (void)ali14xx_init(); #endif #ifdef CONFIG_BLK_DEV_UMC8672 if (probe_umc8672) (void)umc8672_init(); #endif #ifdef CONFIG_BLK_DEV_DTC2278 if (probe_dtc2278) (void)dtc2278_init(); #endif #ifdef CONFIG_BLK_DEV_HT6560B if (probe_ht6560b) (void)ht6560b_init(); #endif #ifdef CONFIG_BLK_DEV_QD65XX if (probe_qd65xx) (void)qd65xx_init(); #endif initializing = 1; /* Probe for special PCI and other "known" interface chipsets. */ probe_for_hwifs(); initializing = 0; #ifdef CONFIG_PROC_FS proc_ide_create(); #endif return 0; } #ifdef MODULE 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 (KERN_INFO "Unknown option '%s'\n", line); } } int init_module (void) { parse_options(options); return ide_init(); } void cleanup_module (void) { int index; for (index = 0; index < MAX_HWIFS; ++index) { ide_unregister(index); if (ide_hwifs[index].dma_base) (void) ide_release_dma(&ide_hwifs[index]); } #ifdef CONFIG_PROC_FS proc_ide_destroy(); #endif devfs_remove("ide"); bus_unregister(&ide_bus_type); } #else /* !MODULE */ __setup("", ide_setup); module_init(ide_init); #endif /* MODULE */