diff options
Diffstat (limited to 'drivers/ide/ide.c')
| -rw-r--r-- | drivers/ide/ide.c | 2269 |
1 files changed, 2269 insertions, 0 deletions
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c new file mode 100644 index 000000000000..973dec799b5c --- /dev/null +++ b/drivers/ide/ide.c @@ -0,0 +1,2269 @@ +/* + * 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 <linux/bitops.h> + +#include <asm/byteorder.h> +#include <asm/irq.h> +#include <asm/uaccess.h> +#include <asm/io.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); + __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); + +#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); + +static struct list_head ide_drives = LIST_HEAD_INIT(ide_drives); + +/* + * 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->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; + + /* 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 - 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 */ + + if (!system_bus_speed) { + if (idebus_parameter) { + /* user supplied value */ + system_bus_speed = idebus_parameter; + } else if (pci_dev_present(pci_default)) { + /* 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; +} + +/* + * drives_lock protects the list of drives, drivers_lock the + * list of drivers. Currently nobody takes both at once. + */ + +static DEFINE_SPINLOCK(drives_lock); +static DEFINE_SPINLOCK(drivers_lock); +static LIST_HEAD(drivers); + +/* Iterator for the driver list. */ + +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; +#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); +} + +/** + * ide_hwif_restore - restore hwif to template + * @hwif: hwif to update + * @tmp_hwif: template + * + * Restore hwif to a previous state by copying most settngs + * from the template. + */ + +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->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->dma_setup = tmp_hwif->dma_setup; + hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; + hwif->dma_start = tmp_hwif->dma_start; + 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_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->sg_max_nents = tmp_hwif->sg_max_nents; + + 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; + static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */ + ide_hwgroup_t *hwgroup; + int irq_count = 0, unit, i; + + BUG_ON(index >= MAX_HWIFS); + + 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); + } + + destroy_proc_ide_interface(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); + + 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); + kfree(hwif->sg_table); + 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); +} + +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; + */ +} + +/** + * ide_register_hw_with_fixup - register IDE interface + * @hw: hardware registers + * @hwifp: pointer to returned hwif + * @fixup: fixup function + * + * Register an IDE interface, specifying exactly the registers etc. + * Set init=1 iff calling before probes have taken place. + * + * Returns -1 on error. + */ + +int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif)) +{ + 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_with_fixup(hwif, fixup); + create_proc_ide_interfaces(); + } + + if (hwifp) + *hwifp = hwif; + + return (initializing || hwif->present) ? index : -1; +} + +EXPORT_SYMBOL(ide_register_hw_with_fixup); + +int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp) +{ + return ide_register_hw_with_fixup(hw, hwifp, NULL); +} + +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 + * @auto_remove: setting auto removal flag + * + * 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. + */ + +static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove) +{ + 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 (auto_remove) + setting->auto_remove = 1; + *p = setting; + up(&ide_setting_sem); + return 0; +abort: + up(&ide_setting_sem); + if (setting) + kfree(setting); + return -1; +} + +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) +{ + return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 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; +} + +/** + * 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); + +/** + * 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; +} + +/** + * ide_add_generic_settings - generic ide settings + * @drive: drive being configured + * + * Add the generic parts of the system settings to the /proc files and + * ioctls for this IDE device. The caller must not be holding the + * ide_setting_sem. + */ + +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, 0); + __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0); + __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0); + __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0); + __ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL, 0); + __ide_add_setting(drive, "using_dma", SETTING_RW, HDIO_GET_DMA, HDIO_SET_DMA, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma, 0); + __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0); + __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0); + __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 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((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 (drive->driver && !strcmp(drive->driver->name, driver)) + return 0; +abort: + return 1; +} + +/** + * ata_attach - attach an ATA/ATAPI device + * @drive: drive to attach + * + * Takes a drive that is as yet not assigned to any midlayer IDE + * driver (or is assigned to the default driver) and figures out + * which driver would like to own it. If nobody claims the drive + * then it is automatically attached to the default driver used for + * unclaimed objects. + * + * A return of zero indicates attachment to a driver, of one + * attachment to the default driver. + * + * Takes drivers_lock. + */ + +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 = NULL; + spin_unlock(&drivers_lock); + if (ide_register_subdriver(drive, NULL)) + panic("ide: default attach failed"); + return 1; +} + +static int generic_ide_suspend(struct device *dev, pm_message_t 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(ide_drive_t *drive, struct file *file, struct block_device *bdev, + unsigned int cmd, unsigned long arg) +{ + ide_settings_t *setting; + ide_driver_t *drv; + 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; + 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: + { + 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); + + ide_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); + + 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_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. + */ +static 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(" : 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", "minus8", "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; + /* an ATAPI device ignores DRDY */ + drive->ready_stat = 0; + 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 obsolete_option; + case -7: /* "noautotune" */ + drive->autotune = IDE_TUNE_NOAUTO; + goto obsolete_option; + 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->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; + 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", 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_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 obsolete_option; +#else + goto bad_hwif; +#endif + case -6: /* dma */ + hwif->autodma = 1; + goto obsolete_option; + case -5: /* "reset" */ + hwif->reset = 1; + goto obsolete_option; + case -4: /* "noautotune" */ + hwif->drives[0].autotune = IDE_TUNE_NOAUTO; + hwif->drives[1].autotune = IDE_TUNE_NOAUTO; + goto obsolete_option; + case -3: /* "autotune" */ + hwif->drives[0].autotune = IDE_TUNE_AUTO; + hwif->drives[1].autotune = IDE_TUNE_AUTO; + goto obsolete_option; + case -2: /* "serialize" */ + do_serialize: + hwif->mate = &ide_hwifs[hw^1]; + hwif->mate->mate = hwif; + hwif->serialized = hwif->mate->serialized = 1; + goto obsolete_option; + + 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 obsolete_option; + + case 0: goto bad_option; + default: + printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); + return 1; + } + } +bad_option: + printk(" -- BAD OPTION\n"); + return 1; +obsolete_option: + printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\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_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 +} + +int ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver) +{ + unsigned long flags; + + spin_lock_irqsave(&ide_lock, flags); + if (!drive->present || drive->driver != NULL || + 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 ? &driver->drives : &ide_drives); + spin_unlock(&drives_lock); +// printk(KERN_INFO "%s: attached %s driver.\n", drive->name, driver->name); +#ifdef CONFIG_PROC_FS + if (driver) + ide_add_proc_entries(drive->proc, driver->proc, drive); +#endif + return 0; +} + +EXPORT_SYMBOL(ide_register_subdriver); + +/** + * ide_unregister_subdriver - disconnect drive from driver + * @drive: drive to unplug + * + * Disconnect a drive from the driver it was attached to and then + * clean up the various proc files and other objects attached to it. + * + * Takes ide_setting_sem, ide_lock and drives_lock. + * Caller must hold none of the locks. + * + * No locking versus subdriver unload because we are moving to the + * default driver anyway. Wants double checking. + */ + +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 == NULL || 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); +#endif + auto_remove_settings(drive); + drive->driver = NULL; + 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 &ide_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; +} + +/** + * ide_register_driver - register IDE device driver + * @driver: the IDE device driver + * + * Register a new device driver and then scan the devices + * on the IDE bus in case any should be attached to the + * driver we have just registered. If so attach them. + * + * Takes drivers_lock and drives_lock. + */ + +int ide_register_driver(ide_driver_t *driver) +{ + struct list_head list; + struct list_head *list_loop; + struct list_head *tmp_storage; + + spin_lock(&drivers_lock); + list_add(&driver->drivers, &drivers); + spin_unlock(&drivers_lock); + + INIT_LIST_HEAD(&list); + spin_lock(&drives_lock); + list_splice_init(&ide_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); + +/** + * ide_unregister_driver - unregister IDE device driver + * @driver: the IDE device driver + * + * Called when a driver module is being unloaded. We reattach any + * devices to whatever driver claims them next (typically the default + * driver). + * + * Takes drivers_lock and called functions will take ide_setting_sem. + */ + +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); + +/* + * 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 + */ +static 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 +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_module (void) +{ + parse_options(options); + return ide_init(); +} + +void cleanup_module (void) +{ + int index; + + for (index = 0; index < MAX_HWIFS; ++index) + ide_unregister(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 */ |