f9383c4269
The IDE driver uses a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> --
1881 lines
48 KiB
C
1881 lines
48 KiB
C
/*
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* linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003
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*
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* Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
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*/
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/*
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* Mostly written by Mark Lord <mlord@pobox.com>
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* and Gadi Oxman <gadio@netvision.net.il>
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* and Andre Hedrick <andre@linux-ide.org>
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*
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* See linux/MAINTAINERS for address of current maintainer.
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*
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* This is the multiple IDE interface driver, as evolved from hd.c.
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* It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
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* (usually 14 & 15).
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* There can be up to two drives per interface, as per the ATA-2 spec.
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*
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* Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
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* Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
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* Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
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* Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
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* ...
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*
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* From hd.c:
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* |
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* | It traverses the request-list, using interrupts to jump between functions.
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* | As nearly all functions can be called within interrupts, we may not sleep.
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* | Special care is recommended. Have Fun!
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* |
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* | modified by Drew Eckhardt to check nr of hd's from the CMOS.
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* |
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* | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
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* | in the early extended-partition checks and added DM partitions.
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* |
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* | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
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* |
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* | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
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* | and general streamlining by Mark Lord (mlord@pobox.com).
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*
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* October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
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*
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* Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
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* Delman Lee (delman@ieee.org) ("Mr. atdisk2")
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* Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
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*
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* This was a rewrite of just about everything from hd.c, though some original
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* code is still sprinkled about. Think of it as a major evolution, with
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* inspiration from lots of linux users, esp. hamish@zot.apana.org.au
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*
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* Version 1.0 ALPHA initial code, primary i/f working okay
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* Version 1.3 BETA dual i/f on shared irq tested & working!
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* Version 1.4 BETA added auto probing for irq(s)
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* Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
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* ...
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* Version 5.50 allow values as small as 20 for idebus=
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* Version 5.51 force non io_32bit in drive_cmd_intr()
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* change delay_10ms() to delay_50ms() to fix problems
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* Version 5.52 fix incorrect invalidation of removable devices
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* add "hdx=slow" command line option
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* Version 5.60 start to modularize the driver; the disk and ATAPI
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* drivers can be compiled as loadable modules.
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* move IDE probe code to ide-probe.c
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* move IDE disk code to ide-disk.c
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* add support for generic IDE device subdrivers
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* add m68k code from Geert Uytterhoeven
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* probe all interfaces by default
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* add ioctl to (re)probe an interface
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* Version 6.00 use per device request queues
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* attempt to optimize shared hwgroup performance
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* add ioctl to manually adjust bandwidth algorithms
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* add kerneld support for the probe module
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* fix bug in ide_error()
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* fix bug in the first ide_get_lock() call for Atari
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* don't flush leftover data for ATAPI devices
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* Version 6.01 clear hwgroup->active while the hwgroup sleeps
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* support HDIO_GETGEO for floppies
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* Version 6.02 fix ide_ack_intr() call
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* check partition table on floppies
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* Version 6.03 handle bad status bit sequencing in ide_wait_stat()
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* Version 6.10 deleted old entries from this list of updates
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* replaced triton.c with ide-dma.c generic PCI DMA
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* added support for BIOS-enabled UltraDMA
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* rename all "promise" things to "pdc4030"
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* fix EZ-DRIVE handling on small disks
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* Version 6.11 fix probe error in ide_scan_devices()
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* fix ancient "jiffies" polling bugs
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* mask all hwgroup interrupts on each irq entry
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* Version 6.12 integrate ioctl and proc interfaces
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* fix parsing of "idex=" command line parameter
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* Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
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* Version 6.14 fixed IRQ sharing among PCI devices
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* Version 6.15 added SMP awareness to IDE drivers
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* Version 6.16 fixed various bugs; even more SMP friendly
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* Version 6.17 fix for newest EZ-Drive problem
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* Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
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* Version 6.19 Re-design for a UNIFORM driver for all platforms,
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* model based on suggestions from Russell King and
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* Geert Uytterhoeven
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* Promise DC4030VL now supported.
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* add support for ide6/ide7
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* delay_50ms() changed to ide_delay_50ms() and exported.
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* Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
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* Added hdx=flash to allow for second flash disk
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* detection w/o the hang loop.
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* Added support for ide8/ide9
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* Added idex=ata66 for the quirky chipsets that are
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* ATA-66 compliant, but have yet to determine a method
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* of verification of the 80c cable presence.
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* Specifically Promise's PDC20262 chipset.
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* Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
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* hat that clarified original low level driver design.
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* Version 6.30 Added SMP support; fixed multmode issues. -ml
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* Version 6.31 Debug Share INTR's and request queue streaming
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* Native ATA-100 support
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* Prep for Cascades Project
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* Version 7.00alpha First named revision of ide rearrange
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*
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* Some additional driver compile-time options are in ./include/linux/ide.h
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*
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* To do, in likely order of completion:
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* - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
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*
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*/
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#define REVISION "Revision: 7.00alpha2"
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#define VERSION "Id: ide.c 7.00a2 20020906"
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#define _IDE_C /* Tell ide.h it's really us */
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/genhd.h>
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#include <linux/blkpg.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/ide.h>
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#include <linux/completion.h>
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#include <linux/reboot.h>
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#include <linux/cdrom.h>
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#include <linux/seq_file.h>
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#include <linux/device.h>
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#include <linux/bitops.h>
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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/* default maximum number of failures */
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#define IDE_DEFAULT_MAX_FAILURES 1
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static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
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IDE2_MAJOR, IDE3_MAJOR,
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IDE4_MAJOR, IDE5_MAJOR,
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IDE6_MAJOR, IDE7_MAJOR,
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IDE8_MAJOR, IDE9_MAJOR };
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static int idebus_parameter; /* holds the "idebus=" parameter */
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static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
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DEFINE_MUTEX(ide_cfg_mtx);
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__cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
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#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
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static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */
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#endif
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int noautodma = 0;
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EXPORT_SYMBOL(noautodma);
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#ifdef CONFIG_BLK_DEV_IDEACPI
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int ide_noacpi = 0;
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int ide_noacpitfs = 1;
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int ide_noacpionboot = 1;
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#endif
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/*
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* This is declared extern in ide.h, for access by other IDE modules:
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*/
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ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
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EXPORT_SYMBOL(ide_hwifs);
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/*
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* Do not even *think* about calling this!
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*/
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static void init_hwif_data(ide_hwif_t *hwif, unsigned int index)
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{
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unsigned int unit;
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/* bulk initialize hwif & drive info with zeros */
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memset(hwif, 0, sizeof(ide_hwif_t));
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/* fill in any non-zero initial values */
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hwif->index = index;
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hwif->major = ide_hwif_to_major[index];
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hwif->name[0] = 'i';
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hwif->name[1] = 'd';
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hwif->name[2] = 'e';
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hwif->name[3] = '0' + index;
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hwif->bus_state = BUSSTATE_ON;
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hwif->atapi_dma = 0; /* disable all atapi dma */
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init_completion(&hwif->gendev_rel_comp);
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default_hwif_iops(hwif);
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default_hwif_transport(hwif);
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for (unit = 0; unit < MAX_DRIVES; ++unit) {
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ide_drive_t *drive = &hwif->drives[unit];
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drive->media = ide_disk;
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drive->select.all = (unit<<4)|0xa0;
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drive->hwif = hwif;
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drive->ctl = 0x08;
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drive->ready_stat = READY_STAT;
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drive->bad_wstat = BAD_W_STAT;
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drive->special.b.recalibrate = 1;
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drive->special.b.set_geometry = 1;
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drive->name[0] = 'h';
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drive->name[1] = 'd';
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drive->name[2] = 'a' + (index * MAX_DRIVES) + unit;
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drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
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drive->using_dma = 0;
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drive->vdma = 0;
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INIT_LIST_HEAD(&drive->list);
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init_completion(&drive->gendev_rel_comp);
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}
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}
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static void init_hwif_default(ide_hwif_t *hwif, unsigned int index)
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{
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hw_regs_t hw;
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memset(&hw, 0, sizeof(hw_regs_t));
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ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq);
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memcpy(&hwif->hw, &hw, sizeof(hw));
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memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports));
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hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
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#ifdef CONFIG_BLK_DEV_HD
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if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA)
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hwif->noprobe = 1; /* may be overridden by ide_setup() */
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#endif
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}
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extern void ide_arm_init(void);
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/*
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* init_ide_data() sets reasonable default values into all fields
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* of all instances of the hwifs and drives, but only on the first call.
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* Subsequent calls have no effect (they don't wipe out anything).
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*
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* This routine is normally called at driver initialization time,
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* but may also be called MUCH earlier during kernel "command-line"
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* parameter processing. As such, we cannot depend on any other parts
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* of the kernel (such as memory allocation) to be functioning yet.
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*
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* This is too bad, as otherwise we could dynamically allocate the
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* ide_drive_t structs as needed, rather than always consuming memory
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* for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
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*
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* FIXME: We should stuff the setup data into __init and copy the
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* relevant hwifs/allocate them properly during boot.
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*/
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#define MAGIC_COOKIE 0x12345678
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static void __init init_ide_data (void)
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{
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ide_hwif_t *hwif;
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unsigned int index;
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static unsigned long magic_cookie = MAGIC_COOKIE;
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if (magic_cookie != MAGIC_COOKIE)
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return; /* already initialized */
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magic_cookie = 0;
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/* Initialise all interface structures */
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for (index = 0; index < MAX_HWIFS; ++index) {
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hwif = &ide_hwifs[index];
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init_hwif_data(hwif, index);
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init_hwif_default(hwif, index);
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#if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI)
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hwif->irq = hwif->hw.irq =
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ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
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#endif
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}
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#ifdef CONFIG_IDE_ARM
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ide_arm_init();
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#endif
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}
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/**
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* ide_system_bus_speed - guess bus speed
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*
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* ide_system_bus_speed() returns what we think is the system VESA/PCI
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* bus speed (in MHz). This is used for calculating interface PIO timings.
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* The default is 40 for known PCI systems, 50 otherwise.
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* The "idebus=xx" parameter can be used to override this value.
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* The actual value to be used is computed/displayed the first time
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* through. Drivers should only use this as a last resort.
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*
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* Returns a guessed speed in MHz.
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*/
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static int ide_system_bus_speed(void)
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{
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#ifdef CONFIG_PCI
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static struct pci_device_id pci_default[] = {
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{ PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
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{ }
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};
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#else
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#define pci_default 0
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#endif /* CONFIG_PCI */
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if (!system_bus_speed) {
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if (idebus_parameter) {
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/* user supplied value */
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system_bus_speed = idebus_parameter;
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} else if (pci_dev_present(pci_default)) {
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/* safe default value for PCI */
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system_bus_speed = 33;
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} else {
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/* safe default value for VESA and PCI */
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system_bus_speed = 50;
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}
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printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
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"for PIO modes%s\n", system_bus_speed,
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idebus_parameter ? "" : "; override with idebus=xx");
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}
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return system_bus_speed;
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}
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static struct resource* hwif_request_region(ide_hwif_t *hwif,
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unsigned long addr, int num)
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{
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struct resource *res = request_region(addr, num, hwif->name);
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if (!res)
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printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
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hwif->name, addr, addr+num-1);
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return res;
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}
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/**
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* ide_hwif_request_regions - request resources for IDE
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* @hwif: interface to use
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*
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* Requests all the needed resources for an interface.
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* Right now core IDE code does this work which is deeply wrong.
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* MMIO leaves it to the controller driver,
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* PIO will migrate this way over time.
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*/
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int ide_hwif_request_regions(ide_hwif_t *hwif)
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{
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unsigned long addr;
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unsigned int i;
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if (hwif->mmio)
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return 0;
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addr = hwif->io_ports[IDE_CONTROL_OFFSET];
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if (addr && !hwif_request_region(hwif, addr, 1))
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goto control_region_busy;
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hwif->straight8 = 0;
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addr = hwif->io_ports[IDE_DATA_OFFSET];
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if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) {
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if (!hwif_request_region(hwif, addr, 8))
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goto data_region_busy;
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hwif->straight8 = 1;
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return 0;
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}
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for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
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addr = hwif->io_ports[i];
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if (!hwif_request_region(hwif, addr, 1)) {
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while (--i)
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release_region(addr, 1);
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goto data_region_busy;
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}
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}
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return 0;
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data_region_busy:
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addr = hwif->io_ports[IDE_CONTROL_OFFSET];
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if (addr)
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release_region(addr, 1);
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control_region_busy:
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/* If any errors are return, we drop the hwif interface. */
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return -EBUSY;
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}
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|
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/**
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* ide_hwif_release_regions - free IDE resources
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*
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* Note that we only release the standard ports,
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* and do not even try to handle any extra ports
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* allocated for weird IDE interface chipsets.
|
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*
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* Note also that we don't yet handle mmio resources here. More
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* importantly our caller should be doing this so we need to
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* restructure this as a helper function for drivers.
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*/
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|
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void ide_hwif_release_regions(ide_hwif_t *hwif)
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{
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u32 i = 0;
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|
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if (hwif->mmio)
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return;
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if (hwif->io_ports[IDE_CONTROL_OFFSET])
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release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
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if (hwif->straight8) {
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release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
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return;
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}
|
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for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
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if (hwif->io_ports[i])
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release_region(hwif->io_ports[i], 1);
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}
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|
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/**
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* ide_hwif_restore - restore hwif to template
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* @hwif: hwif to update
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* @tmp_hwif: template
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*
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* Restore hwif to a previous state by copying most settings
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* from the template.
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*/
|
|
|
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static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
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{
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hwif->hwgroup = tmp_hwif->hwgroup;
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|
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hwif->gendev.parent = tmp_hwif->gendev.parent;
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|
|
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hwif->proc = tmp_hwif->proc;
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|
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hwif->major = tmp_hwif->major;
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hwif->straight8 = tmp_hwif->straight8;
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hwif->bus_state = tmp_hwif->bus_state;
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|
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hwif->atapi_dma = tmp_hwif->atapi_dma;
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hwif->ultra_mask = tmp_hwif->ultra_mask;
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hwif->mwdma_mask = tmp_hwif->mwdma_mask;
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hwif->swdma_mask = tmp_hwif->swdma_mask;
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|
|
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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->udma_filter = tmp_hwif->udma_filter;
|
|
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->dma_off_quietly = tmp_hwif->dma_off_quietly;
|
|
hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq;
|
|
hwif->ide_dma_clear_irq = tmp_hwif->ide_dma_clear_irq;
|
|
hwif->dma_host_on = tmp_hwif->dma_host_on;
|
|
hwif->dma_host_off = tmp_hwif->dma_host_off;
|
|
hwif->dma_lost_irq = tmp_hwif->dma_lost_irq;
|
|
hwif->dma_timeout = tmp_hwif->dma_timeout;
|
|
|
|
hwif->OUTB = tmp_hwif->OUTB;
|
|
hwif->OUTBSYNC = tmp_hwif->OUTBSYNC;
|
|
hwif->OUTW = tmp_hwif->OUTW;
|
|
hwif->OUTSW = tmp_hwif->OUTSW;
|
|
hwif->OUTSL = tmp_hwif->OUTSL;
|
|
|
|
hwif->INB = tmp_hwif->INB;
|
|
hwif->INW = tmp_hwif->INW;
|
|
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->config_data = tmp_hwif->config_data;
|
|
hwif->select_data = tmp_hwif->select_data;
|
|
hwif->extra_base = tmp_hwif->extra_base;
|
|
hwif->extra_ports = tmp_hwif->extra_ports;
|
|
hwif->autodma = tmp_hwif->autodma;
|
|
hwif->udma_four = tmp_hwif->udma_four;
|
|
|
|
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 interface will not be reopened (present/vanishing locking
|
|
* isn't yet done BTW). After we commit to the final kill we
|
|
* call the cleanup callback with the ide locks held.
|
|
*
|
|
* Unregister restores the hwif structures to the default state.
|
|
* This is raving bonkers.
|
|
*/
|
|
|
|
void ide_unregister(unsigned int index)
|
|
{
|
|
ide_drive_t *drive;
|
|
ide_hwif_t *hwif, *g;
|
|
static ide_hwif_t tmp_hwif; /* protected by ide_cfg_mtx */
|
|
ide_hwgroup_t *hwgroup;
|
|
int irq_count = 0, unit;
|
|
|
|
BUG_ON(index >= MAX_HWIFS);
|
|
|
|
BUG_ON(in_interrupt());
|
|
BUG_ON(irqs_disabled());
|
|
mutex_lock(&ide_cfg_mtx);
|
|
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;
|
|
spin_unlock_irq(&ide_lock);
|
|
device_unregister(&drive->gendev);
|
|
wait_for_completion(&drive->gendev_rel_comp);
|
|
spin_lock_irq(&ide_lock);
|
|
}
|
|
hwif->present = 0;
|
|
|
|
spin_unlock_irq(&ide_lock);
|
|
|
|
ide_proc_unregister_port(hwif);
|
|
|
|
hwgroup = hwif->hwgroup;
|
|
/*
|
|
* free the irq if we were the only hwif using it
|
|
*/
|
|
g = hwgroup->hwif;
|
|
do {
|
|
if (g->irq == hwif->irq)
|
|
++irq_count;
|
|
g = g->next;
|
|
} while (g != hwgroup->hwif);
|
|
if (irq_count == 1)
|
|
free_irq(hwif->irq, hwgroup);
|
|
|
|
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
|
|
*/
|
|
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);
|
|
wait_for_completion(&hwif->gendev_rel_comp);
|
|
|
|
/*
|
|
* 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;
|
|
|
|
hwif->extra_base = 0;
|
|
hwif->extra_ports = 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);
|
|
mutex_unlock(&ide_cfg_mtx);
|
|
}
|
|
|
|
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;
|
|
|
|
memset(hw, 0, sizeof(hw_regs_t));
|
|
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
|
|
* @initializing: set while initializing built-in drivers
|
|
* @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, int initializing,
|
|
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;
|
|
hwif->gendev.parent = hw->dev;
|
|
|
|
if (!initializing) {
|
|
probe_hwif_init_with_fixup(hwif, fixup);
|
|
ide_proc_register_port(hwif);
|
|
}
|
|
|
|
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, int initializing, ide_hwif_t **hwifp)
|
|
{
|
|
return ide_register_hw_with_fixup(hw, initializing, hwifp, NULL);
|
|
}
|
|
|
|
EXPORT_SYMBOL(ide_register_hw);
|
|
|
|
/*
|
|
* Locks for IDE setting functionality
|
|
*/
|
|
|
|
DEFINE_MUTEX(ide_setting_mtx);
|
|
|
|
EXPORT_SYMBOL_GPL(ide_setting_mtx);
|
|
|
|
/**
|
|
* ide_spin_wait_hwgroup - wait for group
|
|
* @drive: drive in the group
|
|
*
|
|
* Wait for an IDE device group to go non busy and then return
|
|
* holding the ide_lock which guards the hwgroup->busy status
|
|
* and right to use it.
|
|
*/
|
|
|
|
int ide_spin_wait_hwgroup (ide_drive_t *drive)
|
|
{
|
|
ide_hwgroup_t *hwgroup = HWGROUP(drive);
|
|
unsigned long timeout = jiffies + (3 * HZ);
|
|
|
|
spin_lock_irq(&ide_lock);
|
|
|
|
while (hwgroup->busy) {
|
|
unsigned long lflags;
|
|
spin_unlock_irq(&ide_lock);
|
|
local_irq_set(lflags);
|
|
if (time_after(jiffies, timeout)) {
|
|
local_irq_restore(lflags);
|
|
printk(KERN_ERR "%s: channel busy\n", drive->name);
|
|
return -EBUSY;
|
|
}
|
|
local_irq_restore(lflags);
|
|
spin_lock_irq(&ide_lock);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(ide_spin_wait_hwgroup);
|
|
|
|
int set_io_32bit(ide_drive_t *drive, int arg)
|
|
{
|
|
if (drive->no_io_32bit)
|
|
return -EPERM;
|
|
|
|
if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
|
|
return -EINVAL;
|
|
|
|
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_ksettings(ide_drive_t *drive, int arg)
|
|
{
|
|
if (arg < 0 || arg > 1)
|
|
return -EINVAL;
|
|
|
|
if (ide_spin_wait_hwgroup(drive))
|
|
return -EBUSY;
|
|
drive->keep_settings = arg;
|
|
spin_unlock_irq(&ide_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int set_using_dma(ide_drive_t *drive, int arg)
|
|
{
|
|
#ifdef CONFIG_BLK_DEV_IDEDMA
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
int err = -EPERM;
|
|
|
|
if (arg < 0 || arg > 1)
|
|
return -EINVAL;
|
|
|
|
if (!drive->id || !(drive->id->capability & 1))
|
|
goto out;
|
|
|
|
if (hwif->ide_dma_check == NULL)
|
|
goto out;
|
|
|
|
err = -EBUSY;
|
|
if (ide_spin_wait_hwgroup(drive))
|
|
goto out;
|
|
/*
|
|
* set ->busy flag, unlock and let it ride
|
|
*/
|
|
hwif->hwgroup->busy = 1;
|
|
spin_unlock_irq(&ide_lock);
|
|
|
|
err = 0;
|
|
|
|
if (arg) {
|
|
hwif->dma_off_quietly(drive);
|
|
if (ide_set_dma(drive) || hwif->ide_dma_on(drive))
|
|
err = -EIO;
|
|
} else
|
|
ide_dma_off(drive);
|
|
|
|
/*
|
|
* lock, clear ->busy flag and unlock before leaving
|
|
*/
|
|
spin_lock_irq(&ide_lock);
|
|
hwif->hwgroup->busy = 0;
|
|
spin_unlock_irq(&ide_lock);
|
|
out:
|
|
return err;
|
|
#else
|
|
if (arg < 0 || arg > 1)
|
|
return -EINVAL;
|
|
|
|
return -EPERM;
|
|
#endif
|
|
}
|
|
|
|
int set_pio_mode(ide_drive_t *drive, int arg)
|
|
{
|
|
struct request rq;
|
|
|
|
if (arg < 0 || arg > 255)
|
|
return -EINVAL;
|
|
|
|
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_unmaskirq(ide_drive_t *drive, int arg)
|
|
{
|
|
if (drive->no_unmask)
|
|
return -EPERM;
|
|
|
|
if (arg < 0 || arg > 1)
|
|
return -EINVAL;
|
|
|
|
if (ide_spin_wait_hwgroup(drive))
|
|
return -EBUSY;
|
|
drive->unmask = arg;
|
|
spin_unlock_irq(&ide_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* system_bus_clock - clock guess
|
|
*
|
|
* External version of the bus clock guess used by very old IDE drivers
|
|
* for things like VLB timings. Should not be used.
|
|
*/
|
|
|
|
int system_bus_clock (void)
|
|
{
|
|
return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed ));
|
|
}
|
|
|
|
EXPORT_SYMBOL(system_bus_clock);
|
|
|
|
static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
|
|
{
|
|
ide_drive_t *drive = dev->driver_data;
|
|
ide_hwif_t *hwif = HWIF(drive);
|
|
struct request rq;
|
|
struct request_pm_state rqpm;
|
|
ide_task_t args;
|
|
|
|
/* Call ACPI _GTM only once */
|
|
if (!(drive->dn % 2))
|
|
ide_acpi_get_timing(hwif);
|
|
|
|
memset(&rq, 0, sizeof(rq));
|
|
memset(&rqpm, 0, sizeof(rqpm));
|
|
memset(&args, 0, sizeof(args));
|
|
rq.cmd_type = REQ_TYPE_PM_SUSPEND;
|
|
rq.special = &args;
|
|
rq.data = &rqpm;
|
|
rqpm.pm_step = ide_pm_state_start_suspend;
|
|
if (mesg.event == PM_EVENT_PRETHAW)
|
|
mesg.event = PM_EVENT_FREEZE;
|
|
rqpm.pm_state = mesg.event;
|
|
|
|
return ide_do_drive_cmd(drive, &rq, ide_wait);
|
|
}
|
|
|
|
static int generic_ide_resume(struct device *dev)
|
|
{
|
|
ide_drive_t *drive = dev->driver_data;
|
|
ide_hwif_t *hwif = HWIF(drive);
|
|
struct request rq;
|
|
struct request_pm_state rqpm;
|
|
ide_task_t args;
|
|
int err;
|
|
|
|
/* Call ACPI _STM only once */
|
|
if (!(drive->dn % 2))
|
|
ide_acpi_push_timing(hwif);
|
|
|
|
ide_acpi_exec_tfs(drive);
|
|
|
|
memset(&rq, 0, sizeof(rq));
|
|
memset(&rqpm, 0, sizeof(rqpm));
|
|
memset(&args, 0, sizeof(args));
|
|
rq.cmd_type = REQ_TYPE_PM_RESUME;
|
|
rq.special = &args;
|
|
rq.data = &rqpm;
|
|
rqpm.pm_step = ide_pm_state_start_resume;
|
|
rqpm.pm_state = PM_EVENT_ON;
|
|
|
|
err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
|
|
|
|
if (err == 0 && dev->driver) {
|
|
ide_driver_t *drv = to_ide_driver(dev->driver);
|
|
|
|
if (drv->resume)
|
|
drv->resume(drive);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
unsigned long flags;
|
|
ide_driver_t *drv;
|
|
void __user *p = (void __user *)arg;
|
|
int err = 0, (*setfunc)(ide_drive_t *, int);
|
|
u8 *val;
|
|
|
|
switch (cmd) {
|
|
case HDIO_GET_32BIT: val = &drive->io_32bit; goto read_val;
|
|
case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
|
|
case HDIO_GET_UNMASKINTR: val = &drive->unmask; goto read_val;
|
|
case HDIO_GET_DMA: val = &drive->using_dma; goto read_val;
|
|
case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
|
|
case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
|
|
case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
|
|
case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
|
|
case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case HDIO_OBSOLETE_IDENTITY:
|
|
case HDIO_GET_IDENTITY:
|
|
if (bdev != bdev->bd_contains)
|
|
return -EINVAL;
|
|
if (drive->id_read == 0)
|
|
return -ENOMSG;
|
|
if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
case HDIO_GET_NICE:
|
|
return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP |
|
|
drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP |
|
|
drive->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, 0, 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);
|
|
|
|
if (HWGROUP(drive)->resetting) {
|
|
spin_unlock_irqrestore(&ide_lock, flags);
|
|
return -EBUSY;
|
|
}
|
|
|
|
ide_abort(drive, "drive reset");
|
|
|
|
BUG_ON(HWGROUP(drive)->handler);
|
|
|
|
/* Ensure nothing gets queued after we
|
|
drop the lock. Reset will clear the busy */
|
|
|
|
HWGROUP(drive)->busy = 1;
|
|
spin_unlock_irqrestore(&ide_lock, flags);
|
|
(void) ide_do_reset(drive);
|
|
|
|
return 0;
|
|
}
|
|
|
|
case 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;
|
|
}
|
|
|
|
read_val:
|
|
mutex_lock(&ide_setting_mtx);
|
|
spin_lock_irqsave(&ide_lock, flags);
|
|
err = *val;
|
|
spin_unlock_irqrestore(&ide_lock, flags);
|
|
mutex_unlock(&ide_setting_mtx);
|
|
return err >= 0 ? put_user(err, (long __user *)arg) : err;
|
|
|
|
set_val:
|
|
if (bdev != bdev->bd_contains)
|
|
err = -EINVAL;
|
|
else {
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
err = -EACCES;
|
|
else {
|
|
mutex_lock(&ide_setting_mtx);
|
|
err = setfunc(drive, arg);
|
|
mutex_unlock(&ide_setting_mtx);
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
EXPORT_SYMBOL(generic_ide_ioctl);
|
|
|
|
/*
|
|
* stridx() returns the offset of c within s,
|
|
* or -1 if c is '\0' or not found within s.
|
|
*/
|
|
static int __init stridx (const char *s, char c)
|
|
{
|
|
char *i = strchr(s, c);
|
|
return (i && c) ? i - s : -1;
|
|
}
|
|
|
|
/*
|
|
* match_parm() does parsing for ide_setup():
|
|
*
|
|
* 1. the first char of s must be '='.
|
|
* 2. if the remainder matches one of the supplied keywords,
|
|
* the index (1 based) of the keyword is negated and returned.
|
|
* 3. if the remainder is a series of no more than max_vals numbers
|
|
* separated by commas, the numbers are saved in vals[] and a
|
|
* count of how many were saved is returned. Base10 is assumed,
|
|
* and base16 is allowed when prefixed with "0x".
|
|
* 4. otherwise, zero is returned.
|
|
*/
|
|
static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
|
|
{
|
|
static const char *decimal = "0123456789";
|
|
static const char *hex = "0123456789abcdef";
|
|
int i, n;
|
|
|
|
if (*s++ == '=') {
|
|
/*
|
|
* Try matching against the supplied keywords,
|
|
* and return -(index+1) if we match one
|
|
*/
|
|
if (keywords != NULL) {
|
|
for (i = 0; *keywords != NULL; ++i) {
|
|
if (!strcmp(s, *keywords++))
|
|
return -(i+1);
|
|
}
|
|
}
|
|
/*
|
|
* Look for a series of no more than "max_vals"
|
|
* numeric values separated by commas, in base10,
|
|
* or base16 when prefixed with "0x".
|
|
* Return a count of how many were found.
|
|
*/
|
|
for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
|
|
vals[n] = i;
|
|
while ((i = stridx(decimal, *++s)) >= 0)
|
|
vals[n] = (vals[n] * 10) + i;
|
|
if (*s == 'x' && !vals[n]) {
|
|
while ((i = stridx(hex, *++s)) >= 0)
|
|
vals[n] = (vals[n] * 0x10) + i;
|
|
}
|
|
if (++n == max_vals)
|
|
break;
|
|
if (*s == ',' || *s == ';')
|
|
++s;
|
|
}
|
|
if (!*s)
|
|
return n;
|
|
}
|
|
return 0; /* zero = nothing matched */
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_ALI14XX
|
|
extern int probe_ali14xx;
|
|
extern int ali14xx_init(void);
|
|
#endif
|
|
#ifdef CONFIG_BLK_DEV_UMC8672
|
|
extern int probe_umc8672;
|
|
extern int umc8672_init(void);
|
|
#endif
|
|
#ifdef CONFIG_BLK_DEV_DTC2278
|
|
extern int probe_dtc2278;
|
|
extern int dtc2278_init(void);
|
|
#endif
|
|
#ifdef CONFIG_BLK_DEV_HT6560B
|
|
extern int probe_ht6560b;
|
|
extern int ht6560b_init(void);
|
|
#endif
|
|
#ifdef CONFIG_BLK_DEV_QD65XX
|
|
extern int 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_IDEPCI_PCIBUS_ORDER
|
|
if (!strcmp(s, "ide=reverse")) {
|
|
ide_scan_direction = 1;
|
|
printk(" : Enabled support for IDE inverse scan order.\n");
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_BLK_DEV_IDEACPI
|
|
if (!strcmp(s, "ide=noacpi")) {
|
|
//printk(" : Disable IDE ACPI support.\n");
|
|
ide_noacpi = 1;
|
|
return 1;
|
|
}
|
|
if (!strcmp(s, "ide=acpigtf")) {
|
|
//printk(" : Enable IDE ACPI _GTF support.\n");
|
|
ide_noacpitfs = 0;
|
|
return 1;
|
|
}
|
|
if (!strcmp(s, "ide=acpionboot")) {
|
|
//printk(" : Call IDE ACPI methods on boot.\n");
|
|
ide_noacpionboot = 0;
|
|
return 1;
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_IDEACPI */
|
|
|
|
/*
|
|
* Look for drive options: "hdx="
|
|
*/
|
|
if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
|
|
const char *hd_words[] = {
|
|
"none", "noprobe", "nowerr", "cdrom", "minus5",
|
|
"autotune", "noautotune", "minus8", "swapdata", "bswap",
|
|
"noflush", "remap", "remap63", "scsi", NULL };
|
|
unit = s[2] - 'a';
|
|
hw = unit / MAX_DRIVES;
|
|
unit = unit % MAX_DRIVES;
|
|
hwif = &ide_hwifs[hw];
|
|
drive = &hwif->drives[unit];
|
|
if (strncmp(s + 4, "ide-", 4) == 0) {
|
|
strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
|
|
goto 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 -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 -11: /* noflush */
|
|
drive->noflush = 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", "minus3", "minus4",
|
|
"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));
|
|
hwif->mate = mate;
|
|
mate->mate = hwif;
|
|
hwif->serialized = mate->serialized = 1;
|
|
goto obsolete_option;
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_4DRIVES */
|
|
case -10: /* minus10 */
|
|
case -9: /* minus9 */
|
|
case -8: /* minus8 */
|
|
case -4:
|
|
case -3:
|
|
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 -2: /* "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 __init pnpide_init(void);
|
|
extern void __exit pnpide_exit(void);
|
|
extern void __init h8300_ide_init(void);
|
|
|
|
/*
|
|
* probe_for_hwifs() finds/initializes "known" IDE interfaces
|
|
*/
|
|
static void __init probe_for_hwifs (void)
|
|
{
|
|
#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
|
|
ide_scan_pcibus(ide_scan_direction);
|
|
#endif
|
|
|
|
#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 int pmac_ide_probe(void);
|
|
(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
|
|
}
|
|
|
|
/*
|
|
* Probe module
|
|
*/
|
|
|
|
EXPORT_SYMBOL(ide_lock);
|
|
|
|
static int ide_bus_match(struct device *dev, struct device_driver *drv)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static char *media_string(ide_drive_t *drive)
|
|
{
|
|
switch (drive->media) {
|
|
case ide_disk:
|
|
return "disk";
|
|
case ide_cdrom:
|
|
return "cdrom";
|
|
case ide_tape:
|
|
return "tape";
|
|
case ide_floppy:
|
|
return "floppy";
|
|
case ide_optical:
|
|
return "optical";
|
|
default:
|
|
return "UNKNOWN";
|
|
}
|
|
}
|
|
|
|
static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
return sprintf(buf, "%s\n", media_string(drive));
|
|
}
|
|
|
|
static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
return sprintf(buf, "%s\n", drive->name);
|
|
}
|
|
|
|
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
return sprintf(buf, "ide:m-%s\n", media_string(drive));
|
|
}
|
|
|
|
static struct device_attribute ide_dev_attrs[] = {
|
|
__ATTR_RO(media),
|
|
__ATTR_RO(drivename),
|
|
__ATTR_RO(modalias),
|
|
__ATTR_NULL
|
|
};
|
|
|
|
static int ide_uevent(struct device *dev, char **envp, int num_envp,
|
|
char *buffer, int buffer_size)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
int i = 0;
|
|
int length = 0;
|
|
|
|
add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
|
|
"MEDIA=%s", media_string(drive));
|
|
add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
|
|
"DRIVENAME=%s", drive->name);
|
|
add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
|
|
"MODALIAS=ide:m-%s", media_string(drive));
|
|
envp[i] = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static int generic_ide_probe(struct device *dev)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
ide_driver_t *drv = to_ide_driver(dev->driver);
|
|
|
|
return drv->probe ? drv->probe(drive) : -ENODEV;
|
|
}
|
|
|
|
static int generic_ide_remove(struct device *dev)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
ide_driver_t *drv = to_ide_driver(dev->driver);
|
|
|
|
if (drv->remove)
|
|
drv->remove(drive);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void generic_ide_shutdown(struct device *dev)
|
|
{
|
|
ide_drive_t *drive = to_ide_device(dev);
|
|
ide_driver_t *drv = to_ide_driver(dev->driver);
|
|
|
|
if (dev->driver && drv->shutdown)
|
|
drv->shutdown(drive);
|
|
}
|
|
|
|
struct bus_type ide_bus_type = {
|
|
.name = "ide",
|
|
.match = ide_bus_match,
|
|
.uevent = ide_uevent,
|
|
.probe = generic_ide_probe,
|
|
.remove = generic_ide_remove,
|
|
.shutdown = generic_ide_shutdown,
|
|
.dev_attrs = ide_dev_attrs,
|
|
.suspend = generic_ide_suspend,
|
|
.resume = generic_ide_resume,
|
|
};
|
|
|
|
EXPORT_SYMBOL_GPL(ide_bus_type);
|
|
|
|
/*
|
|
* This is gets invoked once during initialization, to set *everything* up
|
|
*/
|
|
static int __init ide_init(void)
|
|
{
|
|
int ret;
|
|
|
|
printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
|
|
system_bus_speed = ide_system_bus_speed();
|
|
|
|
ret = bus_register(&ide_bus_type);
|
|
if (ret < 0) {
|
|
printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
init_ide_data();
|
|
|
|
proc_ide_create();
|
|
|
|
#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
|
|
|
|
/* Probe for special PCI and other "known" interface chipsets. */
|
|
probe_for_hwifs();
|
|
|
|
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 init_module (void)
|
|
{
|
|
parse_options(options);
|
|
return ide_init();
|
|
}
|
|
|
|
void __exit cleanup_module (void)
|
|
{
|
|
int index;
|
|
|
|
for (index = 0; index < MAX_HWIFS; ++index)
|
|
ide_unregister(index);
|
|
|
|
#ifdef CONFIG_BLK_DEV_IDEPNP
|
|
pnpide_exit();
|
|
#endif
|
|
|
|
proc_ide_destroy();
|
|
|
|
bus_unregister(&ide_bus_type);
|
|
}
|
|
|
|
#else /* !MODULE */
|
|
|
|
__setup("", ide_setup);
|
|
|
|
module_init(ide_init);
|
|
|
|
#endif /* MODULE */
|