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3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 | /* * linux/drivers/block/ide.c Version 5.53 Jun 24, 1997 * * Copyright (C) 1994-1996 Linus Torvalds & authors (see below) */ #define _IDE_C /* needed by <linux/blk.h> */ /* * Maintained by Mark Lord <mlord@pobox.com> * and Gadi Oxman <gadio@netvision.net.il> * * This is the multiple IDE interface driver, as evolved from hd.c. * It supports up to four 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 * * It is easy to extend ide.c to handle more than four interfaces: * * Change the MAX_HWIFS constant in ide.h. * * Define some new major numbers (in major.h), and insert them into * the ide_hwif_to_major table in ide.c. * * Fill in the extra values for the new interfaces into the two tables * inside ide.c: default_io_base[] and default_irqs[]. * * Create the new request handlers by cloning "do_ide3_request()" * for each new interface, and add them to the switch statement * in the ide_init() function in ide.c. * * Recompile, create the new /dev/ entries, and it will probably work. * * 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@mipg.upenn.edu) ("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 3.5 correct the bios_cyl field if it's too small * (linux 1.1.76) (to help fdisk with brain-dead BIOSs) * Version 3.6 cosmetic corrections to comments and stuff * (linux 1.1.77) reorganise probing code to make it understandable * added halfway retry to probing for drive identification * added "hdx=noprobe" command line option * allow setting multmode even when identification fails * Version 3.7 move set_geometry=1 from do_identify() to ide_init() * increase DRQ_WAIT to eliminate nuisance messages * wait for DRQ_STAT instead of DATA_READY during probing * (courtesy of Gary Thomas gary@efland.UU.NET) * Version 3.8 fixed byte-swapping for confused Mitsumi cdrom drives * update of ide-cd.c from Scott, allows blocksize=1024 * cdrom probe fixes, inspired by jprang@uni-duisburg.de * Version 3.9 don't use LBA if lba_capacity looks funny * correct the drive capacity calculations * fix probing for old Seagates without IDE_ALTSTATUS_REG * fix byte-ordering for some NEC cdrom drives * Version 3.10 disable multiple mode by default; was causing trouble * Version 3.11 fix mis-identification of old WD disks as cdroms * Version 3,12 simplify logic for selecting initial mult_count * (fixes problems with buggy WD drives) * Version 3.13 remove excess "multiple mode disabled" messages * Version 3.14 fix ide_error() handling of BUSY_STAT * fix byte-swapped cdrom strings (again.. arghh!) * ignore INDEX bit when checking the ALTSTATUS reg * Version 3.15 add SINGLE_THREADED flag for use with dual-CMD i/f * ignore WRERR_STAT for non-write operations * added vlb_sync support for DC-2000A & others, * (incl. some Promise chips), courtesy of Frank Gockel * Version 3.16 convert vlb_32bit and vlb_sync into runtime flags * add ioctls to get/set VLB flags (HDIO_[SG]ET_CHIPSET) * rename SINGLE_THREADED to SUPPORT_SERIALIZE, * add boot flag to "serialize" operation for CMD i/f * add optional support for DTC2278 interfaces, * courtesy of andy@cercle.cts.com (Dyan Wile). * add boot flag to enable "dtc2278" probe * add probe to avoid EATA (SCSI) interfaces, * courtesy of neuffer@goofy.zdv.uni-mainz.de. * Version 4.00 tidy up verify_area() calls - heiko@colossus.escape.de * add flag to ignore WRERR_STAT for some drives * courtesy of David.H.West@um.cc.umich.edu * assembly syntax tweak to vlb_sync * removable drive support from scuba@cs.tu-berlin.de * add transparent support for DiskManager-6.0x "Dynamic * Disk Overlay" (DDO), most of this is in genhd.c * eliminate "multiple mode turned off" message at boot * Version 4.10 fix bug in ioctl for "hdparm -c3" * fix DM6:DDO support -- now works with LILO, fdisk, ... * don't treat some naughty WD drives as removable * Version 4.11 updated DM6 support using info provided by OnTrack * Version 5.00 major overhaul, multmode setting fixed, vlb_sync fixed * added support for 3rd/4th/alternative IDE ports * created ide.h; ide-cd.c now compiles separate from ide.c * hopefully fixed infinite "unexpected_intr" from cdroms * zillions of other changes and restructuring * somehow reduced overall memory usage by several kB * probably slowed things down slightly, but worth it * Version 5.01 AT LAST!! Finally understood why "unexpected_intr" * was happening at various times/places: whenever the * ide-interface's ctl_port was used to "mask" the irq, * it also would trigger an edge in the process of masking * which would result in a self-inflicted interrupt!! * (such a stupid way to build a hardware interrupt mask). * This is now fixed (after a year of head-scratching). * Version 5.02 got rid of need for {enable,disable}_irq_list() * Version 5.03 tune-ups, comments, remove "busy wait" from drive resets * removed PROBE_FOR_IRQS option -- no longer needed * OOOPS! fixed "bad access" bug for 2nd drive on an i/f * Version 5.04 changed "ira %d" to "irq %d" in DEBUG message * added more comments, cleaned up unexpected_intr() * OOOPS! fixed null pointer problem in ide reset code * added autodetect for Triton chipset -- no effect yet * Version 5.05 OOOPS! fixed bug in revalidate_disk() * OOOPS! fixed bug in ide_do_request() * added ATAPI reset sequence for cdroms * Version 5.10 added Bus-Mastered DMA support for Triton Chipset * some (mostly) cosmetic changes * Version 5.11 added ht6560b support by malafoss@snakemail.hut.fi * reworked PCI scanning code * added automatic RZ1000 detection/support * added automatic PCI CMD640 detection/support * added option for VLB CMD640 support * tweaked probe to find cdrom on hdb with disks on hda,hdc * Version 5.12 some performance tuning * added message to alert user to bad /dev/hd[cd] entries * OOOPS! fixed bug in atapi reset * driver now forces "serialize" again for all cmd640 chips * noticed REALLY_SLOW_IO had no effect, moved it to ide.c * made do_drive_cmd() into public ide_do_drive_cmd() * Version 5.13 fixed typo ('B'), thanks to houston@boyd.geog.mcgill.ca * fixed ht6560b support * Version 5.13b (sss) fix problem in calling ide_cdrom_setup() * don't bother invalidating nonexistent partitions * Version 5.14 fixes to cmd640 support.. maybe it works now(?) * added & tested full EZ-DRIVE support -- don't use LILO! * don't enable 2nd CMD640 PCI port during init - conflict * Version 5.15 bug fix in init_cmd640_vlb() * bug fix in interrupt sharing code * Version 5.16 ugh.. fix "serialize" support, broken in 5.15 * remove "Huh?" from cmd640 code * added qd6580 interface speed select from Colten Edwards * Version 5.17 kludge around bug in BIOS32 on Intel triton motherboards * Version 5.18 new CMD640 code, moved to cmd640.c, #include'd for now * new UMC8672 code, moved to umc8672.c, #include'd for now * disallow turning on DMA when h/w not capable of DMA * Version 5.19 fix potential infinite timeout on resets * extend reset poll into a general purpose polling scheme * add atapi tape drive support from Gadi Oxman * simplify exit from _intr routines -- no IDE_DO_REQUEST * Version 5.20 leave current rq on blkdev request list during I/O * generalized ide_do_drive_cmd() for tape/cdrom driver use * Version 5.21 fix nasty cdrom/tape bug (ide_preempt was messed up) * Version 5.22 fix ide_xlate_1024() to work with/without drive->id * Version 5.23 miscellaneous touch-ups * Version 5.24 fix #if's for SUPPORT_CMD640 * Version 5.25 more touch-ups, fix cdrom resets, ... * cmd640.c now configs/compiles separate from ide.c * Version 5.26 keep_settings now maintains the using_dma flag * fix [EZD] remap message to only output at boot time * fix "bad /dev/ entry" message to say hdc, not hdc0 * fix ide_xlate_1024() to respect user specified CHS * use CHS from partn table if it looks translated * re-merged flags chipset,vlb_32bit,vlb_sync into io_32bit * keep track of interface chipset type, when known * add generic PIO mode "tuneproc" mechanism * fix cmd640_vlb option * fix ht6560b support (was completely broken) * umc8672.c now configures/compiles separate from ide.c * move dtc2278 support to dtc2278.c * move ht6560b support to ht6560b.c * move qd6580 support to qd6580.c * add ali14xx support in ali14xx.c * Version 5.27 add [no]autotune parameters to help cmd640 * move rz1000 support to rz1000.c * Version 5.28 #include "ide_modes.h" * fix disallow_unmask: now per-interface "no_unmask" bit * force io_32bit to be the same on drive pairs of dtc2278 * improved IDE tape error handling, and tape DMA support * bugfix in ide_do_drive_cmd() for cdroms + serialize * Version 5.29 fixed non-IDE check for too many physical heads * don't use LBA if capacity is smaller than CHS * Version 5.30 remove real_devices kludge, formerly used by genhd.c * Version 5.32 change "KB" to "kB" * fix serialize (was broken in kernel 1.3.72) * add support for "hdparm -I" * use common code for disk/tape/cdrom IDE_DRIVE_CMDs * add support for Promise DC4030VL caching card * improved serialize support * put partition check back into alphabetical order * add config option for PCMCIA baggage * try to make PCMCIA support safer to use * improve security on ioctls(): all are suser() only * Version 5.33 improve handling of HDIO_DRIVE_CMDs that read data * Version 5.34 fix irq-sharing problem from 5.33 * fix cdrom ioctl problem from 5.33 * Version 5.35 cosmetic changes * fix cli() problem in try_to_identify() * Version 5.36 fixes to optional PCMCIA support * Version 5.37 don't use DMA when "noautotune" is specified * Version 5.37a (go) fix shared irq probing (was broken in kernel 1.3.72) * call unplug_device() from ide_do_drive_cmd() * Version 5.38 add "hdx=none" option, courtesy of Joel Maslak * mask drive irq after use, if sharing with another hwif * add code to help debug weird cmd640 problems * Version 5.39 fix horrible error in earlier irq sharing "fix" * Version 5.40 fix serialization -- was broken in 5.39 * help sharing by masking device irq after probing * Version 5.41 more fixes to irq sharing/serialize detection * disable io_32bit by default on drive reset * Version 5.42 simplify irq-masking after probe * fix NULL pointer deref in save_match() * Version 5.43 Ugh.. unexpected_intr is back: try to exterminate it * Version 5.44 Fix for "irq probe failed" on cmd640 * change path on message regarding MAKEDEV.ide * add a throttle to the unexpected_intr() messages * Version 5.45 fix ugly parameter parsing bugs (thanks Derek) * include Gadi's magic fix for cmd640 unexpected_intr * include mc68000 patches from Geert Uytterhoeven * add Gadi's fix for PCMCIA cdroms * Version 5.46 remove the mc68000 #ifdefs for 2.0.x * Version 5.47 fix set_tune race condition * fix bug in earlier PCMCIA cdrom update * Version 5.48 if def'd, invoke CMD640_DUMP_REGS when irq probe fails * lengthen the do_reset1() pulse, for laptops * add idebus=xx parameter for cmd640 and ali chipsets * no_unmask flag now per-drive instead of per-hwif * fix tune_req so that it gets done immediately * fix missing restore_flags() in ide_ioctl * prevent use of io_32bit on cmd640 with no prefetch * Version 5.49 fix minor quirks in probing routines * 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 5.53 add ATAPI floppy drive support * change default media for type 0 to floppy * add support for Exabyte Nest * add missing set_blocksize() in revalidate_disk() * handle bad status bit sequencing in ide_wait_stat() * support partition table translations with 255 heads * probe all interfaces by default * add probe for the i82371AB chipset * acknowledge media change on removable drives * add work-around for BMI drives * remove "LBA" from boot messages * Version 5.53.1 add UDMA "CRC retry" support * Version 5.53.2 add Promise/33 auto-detection and DMA support * fix MC_ERR handling * fix mis-detection of NEC cdrom as floppy * issue ATAPI reset and re-probe after "no response" * Version 5.53.3 changes by Andrew D. Balsa to enable DMA mode 2 and * UDMA on SiS and TX chipsets. * Version 5.53.4 moved Promise/33 auto-detection and DMA support * to trition.c and added UDMA to current DMA support. * update Promise Ultra33 and added AEC6210U/UF UDMA cards. * add configuration flag to allow booting of either card. * Version 5.53.5 Fixed chipset identifiers. * Version 5.53.6 Added Aladdin IV/V M5229 chipset support. * Version 5.53.7 Added HPT343 basic support with everything at PIO 0. * This is regardless of DMA capabilties. * * Some additional driver compile-time options are in ide.h * * To do, in likely order of completion: * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f */ #undef REALLY_SLOW_IO /* most systems can safely undef this */ #include <linux/config.h> #include <linux/types.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/timer.h> #include <linux/mm.h> #include <linux/ioport.h> #include <linux/interrupt.h> #include <linux/major.h> #include <linux/blkdev.h> #include <linux/errno.h> #include <linux/hdreg.h> #include <linux/genhd.h> #include <linux/malloc.h> #include <asm/byteorder.h> #include <asm/irq.h> #include <asm/segment.h> #include <asm/io.h> #ifdef CONFIG_PCI #include <linux/bios32.h> #include <linux/pci.h> #endif /* CONFIG_PCI */ #include "ide.h" #include "ide_modes.h" #ifdef CONFIG_BLK_DEV_PROMISE #include "promise.h" #define IS_PROMISE_DRIVE (HWIF(drive)->chipset == ide_promise) #else #define IS_PROMISE_DRIVE (0) /* auto-NULLs out Promise code */ #endif /* CONFIG_BLK_DEV_PROMISE */ static const byte ide_hwif_to_major[MAX_HWIFS] = {IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, IDE5_MAJOR}; static const unsigned short default_io_base[MAX_HWIFS] = {0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160}; static const byte default_irqs[MAX_HWIFS] = {14, 15, 11, 10, 8, 12}; static int idebus_parameter; /* holds the "idebus=" parameter */ static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ /* * This is declared extern in ide.h, for access by other IDE modules: */ ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ #if (DISK_RECOVERY_TIME > 0) /* * For really screwy hardware (hey, at least it *can* be used with Linux) * we can enforce a minimum delay time between successive operations. */ static unsigned long read_timer(void) { unsigned long t, flags; int i; save_flags(flags); cli(); t = jiffies * 11932; outb_p(0, 0x43); i = inb_p(0x40); i |= inb(0x40) << 8; restore_flags(flags); return (t - i); } static void set_recovery_timer (ide_hwif_t *hwif) { hwif->last_time = read_timer(); } #define SET_RECOVERY_TIMER(drive) set_recovery_timer (drive) #else #define SET_RECOVERY_TIMER(drive) #endif /* DISK_RECOVERY_TIME */ /* * Do not even *think* about calling this! */ static void init_hwif_data (unsigned int index) { byte *p; unsigned int unit; ide_hwif_t *hwif = &ide_hwifs[index]; /* bulk initialize hwif & drive info with zeros */ p = ((byte *) hwif) + sizeof(ide_hwif_t); do { *--p = 0; } while (p > (byte *) hwif); /* fill in any non-zero initial values */ hwif->index = index; hwif->io_base = default_io_base[index]; hwif->ctl_port = hwif->io_base ? hwif->io_base+0x206 : 0x000; #ifdef CONFIG_BLK_DEV_HD if (hwif->io_base == HD_DATA) hwif->noprobe = 1; /* may be overridden by ide_setup() */ #endif /* CONFIG_BLK_DEV_HD */ hwif->major = ide_hwif_to_major[index]; hwif->name[0] = 'i'; hwif->name[1] = 'd'; hwif->name[2] = 'e'; hwif->name[3] = '0' + index; #ifdef CONFIG_BLK_DEV_IDETAPE hwif->tape_drive = NULL; #endif /* CONFIG_BLK_DEV_IDETAPE */ for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; 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; } } /* * init_ide_data() sets reasonable default values into all fields * of all instances of the hwifs and drives, but only on the first call. * Subsequent calls have no effect (they don't wipe out anything). * * This routine is normally called at driver initialization time, * but may also be called MUCH earlier during kernel "command-line" * parameter processing. As such, we cannot depend on any other parts * of the kernel (such as memory allocation) to be functioning yet. * * This is too bad, as otherwise we could dynamically allocate the * ide_drive_t structs as needed, rather than always consuming memory * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. */ #define MAGIC_COOKIE 0x12345678 static void init_ide_data (void) { unsigned int index; static unsigned long magic_cookie = MAGIC_COOKIE; if (magic_cookie != MAGIC_COOKIE) return; /* already initialized */ magic_cookie = 0; for (index = 0; index < MAX_HWIFS; ++index) init_hwif_data(index); idebus_parameter = 0; system_bus_speed = 0; } /* * ide_system_bus_speed() returns what we think is the system VESA/PCI * bus speed (in Mhz). This is used for calculating interface PIO timings. * The default is 40 for known PCI systems, 50 otherwise. * The "idebus=xx" parameter can be used to override this value. * The actual value to be used is computed/displayed the first time through. */ int ide_system_bus_speed (void) { if (!system_bus_speed) { if (idebus_parameter) system_bus_speed = idebus_parameter; /* user supplied value */ #ifdef CONFIG_PCI else if (pcibios_present()) system_bus_speed = 40; /* safe default value for PCI */ #endif /* CONFIG_PCI */ else system_bus_speed = 50; /* safe default value for VESA and PCI */ printk("ide: Assuming %dMhz system bus speed for PIO modes; override with idebus=xx\n", system_bus_speed); } return system_bus_speed; } #if SUPPORT_VLB_SYNC /* * Some localbus EIDE interfaces require a special access sequence * when using 32-bit I/O instructions to transfer data. We call this * the "vlb_sync" sequence, which consists of three successive reads * of the sector count register location, with interrupts disabled * to ensure that the reads all happen together. */ static inline void do_vlb_sync (unsigned short port) { (void) inb (port); (void) inb (port); (void) inb (port); } #endif /* SUPPORT_VLB_SYNC */ /* * This is used for most PIO data transfers *from* the IDE interface */ void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount) { unsigned short io_base = HWIF(drive)->io_base; unsigned short data_reg = io_base+IDE_DATA_OFFSET; byte io_32bit = drive->io_32bit; if (io_32bit) { #if SUPPORT_VLB_SYNC if (io_32bit & 2) { cli(); do_vlb_sync(io_base+IDE_NSECTOR_OFFSET); insl(data_reg, buffer, wcount); if (drive->unmask) sti(); } else #endif /* SUPPORT_VLB_SYNC */ insl(data_reg, buffer, wcount); } else { #if SUPPORT_SLOW_DATA_PORTS if (drive->slow) { unsigned short *ptr = (unsigned short *) buffer; while (wcount--) { *ptr++ = inw_p(data_reg); *ptr++ = inw_p(data_reg); } } else #endif /* SUPPORT_SLOW_DATA_PORTS */ insw(data_reg, buffer, wcount<<1); } } /* * This is used for most PIO data transfers *to* the IDE interface */ void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount) { unsigned short io_base = HWIF(drive)->io_base; unsigned short data_reg = io_base+IDE_DATA_OFFSET; byte io_32bit = drive->io_32bit; if (io_32bit) { #if SUPPORT_VLB_SYNC if (io_32bit & 2) { cli(); do_vlb_sync(io_base+IDE_NSECTOR_OFFSET); outsl(data_reg, buffer, wcount); if (drive->unmask) sti(); } else #endif /* SUPPORT_VLB_SYNC */ outsl(data_reg, buffer, wcount); } else { #if SUPPORT_SLOW_DATA_PORTS if (drive->slow) { unsigned short *ptr = (unsigned short *) buffer; while (wcount--) { outw_p(*ptr++, data_reg); outw_p(*ptr++, data_reg); } } else #endif /* SUPPORT_SLOW_DATA_PORTS */ outsw(data_reg, buffer, wcount<<1); } } /* * The following routines are mainly used by the ATAPI drivers. * * These routines will round up any request for an odd number of bytes, * so if an odd bytecount is specified, be sure that there's at least one * extra byte allocated for the buffer. */ void atapi_input_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount) { ++bytecount; ide_input_data (drive, buffer, bytecount / 4); if ((bytecount & 0x03) >= 2) insw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1); } void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount) { ++bytecount; ide_output_data (drive, buffer, bytecount / 4); if ((bytecount & 0x03) >= 2) outsw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1); } /* * This should get invoked any time we exit the driver to * wait for an interrupt response from a drive. handler() points * at the appropriate code to handle the next interrupt, and a * timer is started to prevent us from waiting forever in case * something goes wrong (see the timer_expiry() handler later on). */ void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout) { ide_hwgroup_t *hwgroup = HWGROUP(drive); #ifdef DEBUG if (hwgroup->handler != NULL) { printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n", drive->name, hwgroup->handler, handler); } #endif hwgroup->handler = handler; hwgroup->timer.expires = jiffies + timeout; add_timer(&(hwgroup->timer)); } /* * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity" * value for this drive (from its reported identification information). * * Returns: 1 if lba_capacity looks sensible * 0 otherwise * * Note: we must not change id->cyls here, otherwise a second call * of this routine might no longer find lba_capacity ok. */ static int lba_capacity_is_ok (struct hd_driveid *id) { unsigned long lba_sects = id->lba_capacity; unsigned long chs_sects = id->cyls * id->heads * id->sectors; unsigned long _10_percent = chs_sects / 10; /* * The ATA spec tells large drives to return * C/H/S = 16383/16/63 independent of their size. * Some drives can be jumpered to use 15 heads instead of 16. */ if (id->cyls == 16383 && id->sectors == 63 && (id->heads == 15 || id->heads == 16) && id->lba_capacity >= 16383*63*id->heads) return 1; /* lba_capacity is our only option */ /* perform a rough sanity check on lba_sects: within 10% is "okay" */ if ((lba_sects - chs_sects) < _10_percent) return 1; /* lba_capacity is good */ /* some drives have the word order reversed */ lba_sects = (lba_sects << 16) | (lba_sects >> 16); if ((lba_sects - chs_sects) < _10_percent) { id->lba_capacity = lba_sects; /* fix it */ return 1; /* lba_capacity is (now) good */ } return 0; /* lba_capacity value is bad */ } /* * current_capacity() returns the capacity (in sectors) of a drive * according to its current geometry/LBA settings. * * It also sets select.b.lba. */ static unsigned long current_capacity (ide_drive_t *drive) { struct hd_driveid *id = drive->id; unsigned long capacity; if (!drive->present) return 0; #ifdef CONFIG_BLK_DEV_IDEFLOPPY if (drive->media == ide_floppy) return idefloppy_capacity(drive); #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ if (drive->media != ide_disk) return 0x7fffffff; /* cdrom or tape */ drive->select.b.lba = 0; /* Determine capacity, and use LBA if the drive properly supports it */ capacity = drive->cyl * drive->head * drive->sect; if (id != NULL && (id->capability & 2) && lba_capacity_is_ok(id)) { if (id->lba_capacity >= capacity) { capacity = id->lba_capacity; drive->select.b.lba = 1; } } return (capacity - drive->sect0); } /* * ide_geninit() is called exactly *once* for each major, from genhd.c, * at the beginning of the initial partition check for the drives. */ static void ide_geninit (struct gendisk *gd) { unsigned int unit; ide_hwif_t *hwif = gd->real_devices; for (unit = 0; unit < gd->nr_real; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; #ifdef CONFIG_BLK_DEV_IDECD if (drive->present && drive->media == ide_cdrom) ide_cdrom_setup(drive); #endif /* CONFIG_BLK_DEV_IDECD */ #ifdef CONFIG_BLK_DEV_IDETAPE if (drive->present && drive->media == ide_tape) idetape_setup(drive); #endif /* CONFIG_BLK_DEV_IDETAPE */ #ifdef CONFIG_BLK_DEV_IDEFLOPPY if (drive->present && drive->media == ide_floppy) idefloppy_setup(drive); #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ drive->part[0].nr_sects = current_capacity(drive); if (!drive->present || (drive->media != ide_disk && drive->media != ide_floppy) || !drive->part[0].nr_sects) { drive->part[0].start_sect = -1; /* skip partition check */ } } } /* * init_gendisk() (as opposed to ide_geninit) is called for each major device, * after probing for drives, to allocate partition tables and other data * structures needed for the routines in genhd.c. ide_geninit() gets called * somewhat later, during the partition check. */ static void init_gendisk (ide_hwif_t *hwif) { struct gendisk *gd, **gdp; unsigned int unit, units, minors; int *bs; /* figure out maximum drive number on the interface */ for (units = MAX_DRIVES; units > 0; --units) { if (hwif->drives[units-1].present) break; } minors = units * (1<<PARTN_BITS); gd = kmalloc (sizeof(struct gendisk), GFP_KERNEL); gd->sizes = kmalloc (minors * sizeof(int), GFP_KERNEL); gd->part = kmalloc (minors * sizeof(struct hd_struct), GFP_KERNEL); bs = kmalloc (minors*sizeof(int), GFP_KERNEL); memset(gd->part, 0, minors * sizeof(struct hd_struct)); /* cdroms and msdos f/s are examples of non-1024 blocksizes */ blksize_size[hwif->major] = bs; for (unit = 0; unit < minors; ++unit) *bs++ = BLOCK_SIZE; for (unit = 0; unit < units; ++unit) hwif->drives[unit].part = &gd->part[unit << PARTN_BITS]; gd->major = hwif->major; /* our major device number */ gd->major_name = IDE_MAJOR_NAME; /* treated special in genhd.c */ gd->minor_shift = PARTN_BITS; /* num bits for partitions */ gd->max_p = 1<<PARTN_BITS; /* 1 + max partitions / drive */ gd->max_nr = units; /* max num real drives */ gd->nr_real = units; /* current num real drives */ gd->init = ide_geninit; /* initialization function */ gd->real_devices= hwif; /* ptr to internal data */ gd->next = NULL; /* linked list of major devs */ for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) ; hwif->gd = *gdp = gd; /* link onto tail of list */ } static void do_reset1 (ide_drive_t *, int); /* needed below */ #ifdef CONFIG_BLK_DEV_IDEATAPI /* * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms * during an atapi drive reset operation. If the drive has not yet responded, * and we have not yet hit our maximum waiting time, then the timer is restarted * for another 50ms. */ static void atapi_reset_pollfunc (ide_drive_t *drive) { ide_hwgroup_t *hwgroup = HWGROUP(drive); byte stat; OUT_BYTE (drive->select.all, IDE_SELECT_REG); udelay (10); if (OK_STAT(stat=GET_STAT(), 0, BUSY_STAT)) { printk("%s: ATAPI reset complete\n", drive->name); } else { if (jiffies < hwgroup->poll_timeout) { ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20); return; /* continue polling */ } hwgroup->poll_timeout = 0; /* end of polling */ printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive->name, stat); do_reset1 (drive, 1); /* do it the old fashioned way */ return; } hwgroup->poll_timeout = 0; /* done polling */ } #endif /* CONFIG_BLK_DEV_IDEATAPI */ /* * reset_pollfunc() gets invoked to poll the interface for completion every 50ms * during an ide reset operation. If the drives have not yet responded, * and we have not yet hit our maximum waiting time, then the timer is restarted * for another 50ms. */ static void reset_pollfunc (ide_drive_t *drive) { ide_hwgroup_t *hwgroup = HWGROUP(drive); ide_hwif_t *hwif = HWIF(drive); byte tmp; if (!OK_STAT(tmp=GET_STAT(), 0, BUSY_STAT)) { if (jiffies < hwgroup->poll_timeout) { ide_set_handler (drive, &reset_pollfunc, HZ/20); return; /* continue polling */ } printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); } else { printk("%s: reset: ", hwif->name); if ((tmp = GET_ERR()) == 1) printk("success\n"); else { #if FANCY_STATUS_DUMPS printk("master: "); switch (tmp & 0x7f) { case 1: printk("passed"); break; case 2: printk("formatter device error"); break; case 3: printk("sector buffer error"); break; case 4: printk("ECC circuitry error"); break; case 5: printk("controlling MPU error"); break; default:printk("error (0x%02x?)", tmp); } if (tmp & 0x80) printk("; slave: failed"); printk("\n"); #else printk("failed\n"); #endif /* FANCY_STATUS_DUMPS */ } } hwgroup->poll_timeout = 0; /* done polling */ } /* * do_reset1() attempts to recover a confused drive by resetting it. * Unfortunately, resetting a disk drive actually resets all devices on * the same interface, so it can really be thought of as resetting the * interface rather than resetting the drive. * * ATAPI devices have their own reset mechanism which allows them to be * individually reset without clobbering other devices on the same interface. * * Unfortunately, the IDE interface does not generate an interrupt to let * us know when the reset operation has finished, so we must poll for this. * Equally poor, though, is the fact that this may a very long time to complete, * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, * we set a timer to poll at 50ms intervals. */ static void do_reset1 (ide_drive_t *drive, int do_not_try_atapi) { unsigned int unit; unsigned long flags; ide_hwif_t *hwif = HWIF(drive); ide_hwgroup_t *hwgroup = HWGROUP(drive); save_flags(flags); cli(); /* Why ? */ #ifdef CONFIG_BLK_DEV_IDEATAPI /* For an ATAPI device, first try an ATAPI SRST. */ if (drive->media != ide_disk) { if (!do_not_try_atapi) { if (!drive->keep_settings) { drive->unmask = 0; drive->io_32bit = 0; } OUT_BYTE (drive->select.all, IDE_SELECT_REG); udelay (20); OUT_BYTE (WIN_SRST, IDE_COMMAND_REG); hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; ide_set_handler (drive, &atapi_reset_pollfunc, HZ/20); restore_flags (flags); return; } } #endif /* CONFIG_BLK_DEV_IDEATAPI */ /* * First, reset any device state data we were maintaining * for any of the drives on this interface. */ for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *rdrive = &hwif->drives[unit]; #ifdef CONFIG_BLK_DEV_IDETAPE if (rdrive->media == ide_tape) rdrive->tape.reset_issued = 1; #endif /* CONFIG_BLK_DEV_IDETAPE */ rdrive->special.all = 0; rdrive->special.b.set_geometry = 1; rdrive->special.b.recalibrate = 1; if (OK_TO_RESET_CONTROLLER) rdrive->mult_count = 0; if (!rdrive->keep_settings) { rdrive->mult_req = 0; rdrive->unmask = 0; rdrive->io_32bit = 0; if (rdrive->using_dma) { rdrive->using_dma = 0; printk("%s: disabled DMA\n", rdrive->name); } } if (rdrive->mult_req != rdrive->mult_count) rdrive->special.b.set_multmode = 1; } #if OK_TO_RESET_CONTROLLER /* * Note that we also set nIEN while resetting the device, * to mask unwanted interrupts from the interface during the reset. * However, due to the design of PC hardware, this will cause an * immediate interrupt due to the edge transition it produces. * This single interrupt gives us a "fast poll" for drives that * recover from reset very quickly, saving us the first 50ms wait time. */ OUT_BYTE(drive->ctl|6,IDE_CONTROL_REG); /* set SRST and nIEN */ udelay(10); /* more than enough time */ OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* clear SRST, leave nIEN */ udelay(10); /* more than enough time */ hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; ide_set_handler (drive, &reset_pollfunc, HZ/20); #endif /* OK_TO_RESET_CONTROLLER */ restore_flags (flags); } /* * ide_do_reset() is the entry point to the drive/interface reset code. */ void ide_do_reset (ide_drive_t *drive) { do_reset1 (drive, 0); #ifdef CONFIG_BLK_DEV_IDETAPE if (drive->media == ide_tape) drive->tape.reset_issued=1; #endif /* CONFIG_BLK_DEV_IDETAPE */ } /* * Clean up after success/failure of an explicit drive cmd */ void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err) { unsigned long flags; struct request *rq = HWGROUP(drive)->rq; if (rq->cmd == IDE_DRIVE_CMD) { byte *args = (byte *) rq->buffer; rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT); if (args) { args[0] = stat; args[1] = err; args[2] = IN_BYTE(IDE_NSECTOR_REG); } } save_flags(flags); cli(); blk_dev[MAJOR(rq->rq_dev)].current_request = rq->next; HWGROUP(drive)->rq = NULL; rq->rq_status = RQ_INACTIVE; if (rq->sem != NULL) up(rq->sem); restore_flags(flags); } /* * Error reporting, in human readable form (luxurious, but a memory hog). */ byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat) { unsigned long flags; byte err = 0; save_flags (flags); sti(); printk("%s: %s: status=0x%02x", drive->name, msg, stat); #if FANCY_STATUS_DUMPS if (drive->media == ide_disk) { printk(" { "); if (stat & BUSY_STAT) printk("Busy "); else { if (stat & READY_STAT) printk("DriveReady "); if (stat & WRERR_STAT) printk("DeviceFault "); if (stat & SEEK_STAT) printk("SeekComplete "); if (stat & DRQ_STAT) printk("DataRequest "); if (stat & ECC_STAT) printk("CorrectedError "); if (stat & INDEX_STAT) printk("Index "); if (stat & ERR_STAT) printk("Error "); } printk("}"); } #endif /* FANCY_STATUS_DUMPS */ printk("\n"); if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) { err = GET_ERR(); printk("%s: %s: error=0x%02x", drive->name, msg, err); #if FANCY_STATUS_DUMPS if (drive->media == ide_disk) { printk(" { "); if (err & ICRC_ERR) printk((err & ABRT_ERR) ? "BadCRC " : "BadSector "); if (err & ECC_ERR) printk("UncorrectableError "); if (err & ID_ERR) printk("SectorIdNotFound "); if (err & ABRT_ERR) printk("DriveStatusError "); if (err & TRK0_ERR) printk("TrackZeroNotFound "); if (err & MARK_ERR) printk("AddrMarkNotFound "); printk("}"); if (err & (BBD_ERR|ECC_ERR|ID_ERR|MARK_ERR)) { byte cur = IN_BYTE(IDE_SELECT_REG); if (cur & 0x40) { /* using LBA? */ printk(", LBAsect=%ld", (unsigned long) ((cur&0xf)<<24) |(IN_BYTE(IDE_HCYL_REG)<<16) |(IN_BYTE(IDE_LCYL_REG)<<8) | IN_BYTE(IDE_SECTOR_REG)); } else { printk(", CHS=%d/%d/%d", (IN_BYTE(IDE_HCYL_REG)<<8) + IN_BYTE(IDE_LCYL_REG), cur & 0xf, IN_BYTE(IDE_SECTOR_REG)); } if (HWGROUP(drive)->rq) printk(", sector=%ld", HWGROUP(drive)->rq->sector); } } #endif /* FANCY_STATUS_DUMPS */ printk("\n"); } restore_flags (flags); return err; } /* * try_to_flush_leftover_data() is invoked in response to a drive * unexpectedly having its DRQ_STAT bit set. As an alternative to * resetting the drive, this routine tries to clear the condition * by read a sector's worth of data from the drive. Of course, * this may not help if the drive is *waiting* for data from *us*. */ static void try_to_flush_leftover_data (ide_drive_t *drive) { int i = (drive->mult_count ? drive->mult_count : 1) * SECTOR_WORDS; while (i > 0) { unsigned long buffer[16]; unsigned int wcount = (i > 16) ? 16 : i; i -= wcount; ide_input_data (drive, buffer, wcount); } } /* * ide_error() takes action based on the error returned by the controller. */ void ide_error (ide_drive_t *drive, const char *msg, byte stat) { struct request *rq; byte err; err = ide_dump_status(drive, msg, stat); if ((rq = HWGROUP(drive)->rq) == NULL || drive == NULL) return; /* retry only "normal" I/O: */ if (rq->cmd == IDE_DRIVE_CMD) { rq->errors = 1; ide_end_drive_cmd(drive, stat, err); return; } if (stat & BUSY_STAT) { /* other bits are useless when BUSY */ rq->errors |= ERROR_RESET; } else { if (drive->media == ide_disk && (stat & ERR_STAT)) { /* err has different meaning on cdrom and tape */ if (err == ABRT_ERR) { if (drive->select.b.lba && IN_BYTE(IDE_COMMAND_REG) == WIN_SPECIFY) return; /* some newer drives don't support WIN_SPECIFY */ } else if ((err & (ABRT_ERR | ICRC_ERR)) == (ABRT_ERR | ICRC_ERR)) ; /* UDMA crc error -- just retry the operation */ else if (err & (BBD_ERR | ECC_ERR)) /* retries won't help these */ rq->errors = ERROR_MAX; else if (err & TRK0_ERR) /* help it find track zero */ rq->errors |= ERROR_RECAL; else if (err & MC_ERR) drive->special.b.mc = 1; } if ((stat & DRQ_STAT) && rq->cmd != WRITE) try_to_flush_leftover_data(drive); } if (GET_STAT() & (BUSY_STAT|DRQ_STAT)) rq->errors |= ERROR_RESET; /* Mmmm.. timing problem */ if (rq->errors >= ERROR_MAX) { #ifdef CONFIG_BLK_DEV_IDETAPE if (drive->media == ide_tape) { rq->errors = 0; idetape_end_request(0, HWGROUP(drive)); } else #endif /* CONFIG_BLK_DEV_IDETAPE */ #ifdef CONFIG_BLK_DEV_IDEFLOPPY if (drive->media == ide_floppy) { rq->errors = 0; idefloppy_end_request(0, HWGROUP(drive)); } else #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ #ifdef CONFIG_BLK_DEV_IDESCSI if (drive->media == ide_scsi) { rq->errors = 0; idescsi_end_request(0, HWGROUP(drive)); } else #endif /* CONFIG_BLK_DEV_IDESCSI */ ide_end_request(0, HWGROUP(drive)); } else { if ((rq->errors & ERROR_RESET) == ERROR_RESET) { ++rq->errors; ide_do_reset(drive); return; } else if ((rq->errors & ERROR_RECAL) == ERROR_RECAL) drive->special.b.recalibrate = 1; ++rq->errors; } } /* * read_intr() is the handler for disk read/multread interrupts */ static void read_intr (ide_drive_t *drive) { byte stat; int i; unsigned int msect, nsect; struct request *rq; if (!OK_STAT(stat=GET_STAT(),DATA_READY,BAD_R_STAT)) { ide_error(drive, "read_intr", stat); return; } msect = drive->mult_count; read_next: rq = HWGROUP(drive)->rq; if (msect) { if ((nsect = rq->current_nr_sectors) > msect) nsect = msect; msect -= nsect; } else nsect = 1; ide_input_data(drive, rq->buffer, nsect * SECTOR_WORDS); #ifdef DEBUG printk("%s: read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n", drive->name, rq->sector, rq->sector+nsect-1, (unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect); #endif rq->sector += nsect; rq->buffer += nsect<<9; rq->errors = 0; i = (rq->nr_sectors -= nsect); if ((rq->current_nr_sectors -= nsect) <= 0) ide_end_request(1, HWGROUP(drive)); if (i > 0) { if (msect) goto read_next; ide_set_handler (drive, &read_intr, WAIT_CMD); } } /* * write_intr() is the handler for disk write interrupts */ static void write_intr (ide_drive_t *drive) { byte stat; int i; ide_hwgroup_t *hwgroup = HWGROUP(drive); struct request *rq = hwgroup->rq; if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) { #ifdef DEBUG printk("%s: write: sector %ld, buffer=0x%08lx, remaining=%ld\n", drive->name, rq->sector, (unsigned long) rq->buffer, rq->nr_sectors-1); #endif if ((rq->nr_sectors == 1) ^ ((stat & DRQ_STAT) != 0)) { rq->sector++; rq->buffer += 512; rq->errors = 0; i = --rq->nr_sectors; --rq->current_nr_sectors; if (rq->current_nr_sectors <= 0) ide_end_request(1, hwgroup); if (i > 0) { ide_output_data (drive, rq->buffer, SECTOR_WORDS); ide_set_handler (drive, &write_intr, WAIT_CMD); } return; } } ide_error(drive, "write_intr", stat); } /* * ide_multwrite() transfers a block of up to mcount sectors of data * to a drive as part of a disk multiple-sector write operation. */ void ide_multwrite (ide_drive_t *drive, unsigned int mcount) { struct request *rq = &HWGROUP(drive)->wrq; do { unsigned int nsect = rq->current_nr_sectors; if (nsect > mcount) nsect = mcount; mcount -= nsect; ide_output_data(drive, rq->buffer, nsect<<7); #ifdef DEBUG printk("%s: multwrite: sector %ld, buffer=0x%08lx, count=%d, remaining=%ld\n", drive->name, rq->sector, (unsigned long) rq->buffer, nsect, rq->nr_sectors - nsect); #endif if ((rq->nr_sectors -= nsect) <= 0) break; if ((rq->current_nr_sectors -= nsect) == 0) { if ((rq->bh = rq->bh->b_reqnext) != NULL) { rq->current_nr_sectors = rq->bh->b_size>>9; rq->buffer = rq->bh->b_data; } else { panic("%s: buffer list corrupted\n", drive->name); break; } } else { rq->buffer += nsect << 9; } } while (mcount); } /* * multwrite_intr() is the handler for disk multwrite interrupts */ static void multwrite_intr (ide_drive_t *drive) { byte stat; int i; ide_hwgroup_t *hwgroup = HWGROUP(drive); struct request *rq = &hwgroup->wrq; if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) { if (stat & DRQ_STAT) { if (rq->nr_sectors) { ide_multwrite(drive, drive->mult_count); ide_set_handler (drive, &multwrite_intr, WAIT_CMD); return; } } else { if (!rq->nr_sectors) { /* all done? */ rq = hwgroup->rq; for (i = rq->nr_sectors; i > 0;){ i -= rq->current_nr_sectors; ide_end_request(1, hwgroup); } return; } } } ide_error(drive, "multwrite_intr", stat); } /* * Issue a simple drive command * The drive must be selected beforehand. */ static void ide_cmd(ide_drive_t *drive, byte cmd, byte nsect, ide_handler_t *handler) { ide_set_handler (drive, handler, WAIT_CMD); OUT_BYTE(drive->ctl,IDE_CONTROL_REG); OUT_BYTE(nsect,IDE_NSECTOR_REG); OUT_BYTE(cmd,IDE_COMMAND_REG); } /* * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd. */ static void set_multmode_intr (ide_drive_t *drive) { byte stat = GET_STAT(); sti(); if (OK_STAT(stat,READY_STAT,BAD_STAT)) { drive->mult_count = drive->mult_req; } else { drive->mult_req = drive->mult_count = 0; drive->special.b.recalibrate = 1; (void) ide_dump_status(drive, "set_multmode", stat); } } /* * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd. */ static void set_geometry_intr (ide_drive_t *drive) { byte stat = GET_STAT(); sti(); if (!OK_STAT(stat,READY_STAT,BAD_STAT)) ide_error(drive, "set_geometry_intr", stat); } /* * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd. */ static void recal_intr (ide_drive_t *drive) { byte stat = GET_STAT(); sti(); if (!OK_STAT(stat,READY_STAT,BAD_STAT)) ide_error(drive, "recal_intr", stat); } /* * mc_intr() is invoked on completion of a WIN_ACKMC cmd. */ static void mc_intr (ide_drive_t *drive) { byte stat = GET_STAT(); sti(); if (!OK_STAT(stat,READY_STAT,BAD_STAT)) ide_error(drive, "mc_intr", stat); drive->special.b.mc = 0; } /* * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD. */ static void drive_cmd_intr (ide_drive_t *drive) { struct request *rq = HWGROUP(drive)->rq; byte *args = (byte *) rq->buffer; byte stat = GET_STAT(); sti(); if ((stat & DRQ_STAT) && args && args[3]) { byte io_32bit = drive->io_32bit; drive->io_32bit = 0; ide_input_data(drive, &args[4], args[3] * SECTOR_WORDS); drive->io_32bit = io_32bit; stat = GET_STAT(); } if (OK_STAT(stat,READY_STAT,BAD_STAT)) ide_end_drive_cmd (drive, stat, GET_ERR()); else ide_error(drive, "drive_cmd", stat); /* calls ide_end_drive_cmd */ } /* * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT * commands to a drive. It used to do much more, but has been scaled back. */ static inline void do_special (ide_drive_t *drive) { special_t *s = &drive->special; #ifdef DEBUG printk("%s: do_special: 0x%02x\n", drive->name, s->all); #endif if (s->b.set_geometry) { s->b.set_geometry = 0; if (drive->media == ide_disk && !drive->no_geom) { OUT_BYTE(drive->sect,IDE_SECTOR_REG); OUT_BYTE(drive->cyl,IDE_LCYL_REG); OUT_BYTE(drive->cyl>>8,IDE_HCYL_REG); OUT_BYTE(((drive->head-1)|drive->select.all)&0xBF,IDE_SELECT_REG); if (!IS_PROMISE_DRIVE) ide_cmd(drive, WIN_SPECIFY, drive->sect, &set_geometry_intr); } } else if (s->b.recalibrate) { s->b.recalibrate = 0; if (drive->media == ide_disk && !IS_PROMISE_DRIVE) ide_cmd(drive, WIN_RESTORE, drive->sect, &recal_intr); } else if (s->b.set_tune) { ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc; s->b.set_tune = 0; if (tuneproc != NULL) tuneproc(drive, drive->tune_req); } else if (s->b.set_multmode) { s->b.set_multmode = 0; if (drive->media == ide_disk) { if (drive->id && drive->mult_req > drive->id->max_multsect) drive->mult_req = drive->id->max_multsect; if (!IS_PROMISE_DRIVE) ide_cmd(drive, WIN_SETMULT, drive->mult_req, &set_multmode_intr); } else drive->mult_req = 0; } else if (s->b.mc) { s->b.mc = 0; if (drive->media == ide_disk && !IS_PROMISE_DRIVE) ide_cmd(drive, WIN_ACKMC, drive->sect, &mc_intr); } else if (s->all) { int special = s->all; s->all = 0; printk("%s: bad special flag: 0x%02x\n", drive->name, special); } } /* * This routine busy-waits for the drive status to be not "busy". * It then checks the status for all of the "good" bits and none * of the "bad" bits, and if all is okay it returns 0. All other * cases return 1 after invoking ide_error() -- caller should just return. * * This routine should get fixed to not hog the cpu during extra long waits.. * That could be done by busy-waiting for the first jiffy or two, and then * setting a timer to wake up at half second intervals thereafter, * until timeout is achieved, before timing out. */ int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout) { byte stat; unsigned long flags; udelay(1); /* spec allows drive 400ns to assert "BUSY" */ if ((stat = GET_STAT()) & BUSY_STAT) { save_flags(flags); sti(); timeout += jiffies; while ((stat = GET_STAT()) & BUSY_STAT) { if (jiffies > timeout) { restore_flags(flags); ide_error(drive, "status timeout", stat); return 1; } } restore_flags(flags); } udelay(1); /* allow status to settle, then read it again */ if (OK_STAT((stat = GET_STAT()), good, bad)) return 0; ide_error(drive, "status error", stat); return 1; } /* * do_rw_disk() issues READ and WRITE commands to a disk, * using LBA if supported, or CHS otherwise, to address sectors. * It also takes care of issuing special DRIVE_CMDs. */ static inline void do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block) { ide_hwif_t *hwif = HWIF(drive); unsigned short io_base = hwif->io_base; #ifdef CONFIG_BLK_DEV_PROMISE int use_promise_io = 0; #endif /* CONFIG_BLK_DEV_PROMISE */ OUT_BYTE(drive->ctl,IDE_CONTROL_REG); OUT_BYTE(rq->nr_sectors,io_base+IDE_NSECTOR_OFFSET); #ifdef CONFIG_BLK_DEV_PROMISE if (IS_PROMISE_DRIVE) { if (hwif->is_promise2 || rq->cmd == READ) { use_promise_io = 1; } } if (drive->select.b.lba || use_promise_io) { #else /* !CONFIG_BLK_DEV_PROMISE */ if (drive->select.b.lba) { #endif /* CONFIG_BLK_DEV_PROMISE */ #ifdef DEBUG printk("%s: %sing: LBAsect=%ld, sectors=%ld, buffer=0x%08lx\n", drive->name, (rq->cmd==READ)?"read":"writ", block, rq->nr_sectors, (unsigned long) rq->buffer); #endif OUT_BYTE(block,io_base+IDE_SECTOR_OFFSET); OUT_BYTE(block>>=8,io_base+IDE_LCYL_OFFSET); OUT_BYTE(block>>=8,io_base+IDE_HCYL_OFFSET); OUT_BYTE(((block>>8)&0x0f)|drive->select.all,io_base+IDE_SELECT_OFFSET); } else { unsigned int sect,head,cyl,track; track = block / drive->sect; sect = block % drive->sect + 1; OUT_BYTE(sect,io_base+IDE_SECTOR_OFFSET); head = track % drive->head; cyl = track / drive->head; OUT_BYTE(cyl,io_base+IDE_LCYL_OFFSET); OUT_BYTE(cyl>>8,io_base+IDE_HCYL_OFFSET); OUT_BYTE(head|drive->select.all,io_base+IDE_SELECT_OFFSET); #ifdef DEBUG printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n", drive->name, (rq->cmd==READ)?"read":"writ", cyl, head, sect, rq->nr_sectors, (unsigned long) rq->buffer); #endif } #ifdef CONFIG_BLK_DEV_PROMISE if (use_promise_io) { do_promise_io (drive, rq); return; } #endif /* CONFIG_BLK_DEV_PROMISE */ if (rq->cmd == READ) { #ifdef CONFIG_BLK_DEV_TRITON if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_read, drive))) return; #endif /* CONFIG_BLK_DEV_TRITON */ ide_set_handler(drive, &read_intr, WAIT_CMD); OUT_BYTE(drive->mult_count ? WIN_MULTREAD : WIN_READ, io_base+IDE_COMMAND_OFFSET); return; } if (rq->cmd == WRITE) { #ifdef CONFIG_BLK_DEV_TRITON if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_write, drive))) return; #endif /* CONFIG_BLK_DEV_TRITON */ OUT_BYTE(drive->mult_count ? WIN_MULTWRITE : WIN_WRITE, io_base+IDE_COMMAND_OFFSET); if (ide_wait_stat(drive, DATA_READY, drive->bad_wstat, WAIT_DRQ)) { printk("%s: no DRQ after issuing %s\n", drive->name, drive->mult_count ? "MULTWRITE" : "WRITE"); return; } if (!drive->unmask) cli(); if (drive->mult_count) { HWGROUP(drive)->wrq = *rq; /* scratchpad */ ide_set_handler (drive, &multwrite_intr, WAIT_CMD); ide_multwrite(drive, drive->mult_count); } else { ide_set_handler (drive, &write_intr, WAIT_CMD); ide_output_data(drive, rq->buffer, SECTOR_WORDS); } return; } printk("%s: bad command: %d\n", drive->name, rq->cmd); ide_end_request(0, HWGROUP(drive)); } /* * execute_drive_cmd() issues a special drive command, * usually initiated by ioctl() from the external hdparm program. */ static void execute_drive_cmd (ide_drive_t *drive, struct request *rq) { byte *args = rq->buffer; if (args) { #ifdef DEBUG printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x xx=0x%02x\n", drive->name, args[0], args[1], args[2], args[3]); #endif OUT_BYTE(args[2],IDE_FEATURE_REG); ide_cmd(drive, args[0], args[1], &drive_cmd_intr); return; } else { /* * NULL is actually a valid way of waiting for * all current requests to be flushed from the queue. */ #ifdef DEBUG printk("%s: DRIVE_CMD (null)\n", drive->name); #endif ide_end_drive_cmd(drive, GET_STAT(), GET_ERR()); return; } } /* * do_request() initiates handling of a new I/O request */ static inline void do_request (ide_hwif_t *hwif, struct request *rq) { unsigned int minor, unit; unsigned long block, blockend; ide_drive_t *drive; sti(); #ifdef DEBUG printk("%s: do_request: current=0x%08lx\n", hwif->name, (unsigned long) rq); #endif minor = MINOR(rq->rq_dev); unit = minor >> PARTN_BITS; if (MAJOR(rq->rq_dev) != hwif->major || unit >= MAX_DRIVES) { printk("%s: bad device number: %s\n", hwif->name, kdevname(rq->rq_dev)); goto kill_rq; } drive = &hwif->drives[unit]; #ifdef DEBUG if (rq->bh && !buffer_locked(rq->bh)) { printk("%s: block not locked\n", drive->name); goto kill_rq; } #endif block = rq->sector; blockend = block + rq->nr_sectors; if ((blockend < block) || (blockend > drive->part[minor&PARTN_MASK].nr_sects)) { printk("%s%c: bad access: block=%ld, count=%ld\n", drive->name, (minor&PARTN_MASK)?'0'+(minor&PARTN_MASK):' ', block, rq->nr_sectors); goto kill_rq; } block += drive->part[minor&PARTN_MASK].start_sect + drive->sect0; #if FAKE_FDISK_FOR_EZDRIVE /* Yecch - this will shift the entire interval, possibly killing some innocent following sector */ if (block == 0 && drive->remap_0_to_1) block = 1; /* redirect MBR access to EZ-Drive partn table */ #endif /* FAKE_FDISK_FOR_EZDRIVE */ ((ide_hwgroup_t *)hwif->hwgroup)->drive = drive; #if (DISK_RECOVERY_TIME > 0) while ((read_timer() - hwif->last_time) < DISK_RECOVERY_TIME); #endif #ifdef CONFIG_BLK_DEV_IDETAPE POLL_HWIF_TAPE_DRIVE; /* macro from ide-tape.h */ #endif /* CONFIG_BLK_DEV_IDETAPE */ SELECT_DRIVE(hwif,drive); if (ide_wait_stat(drive, drive->ready_stat, BUSY_STAT|DRQ_STAT, WAIT_READY)) { printk("%s: drive not ready for command\n", drive->name); return; } if (!drive->special.all) { if (rq->cmd == IDE_DRIVE_CMD) { execute_drive_cmd(drive, rq); return; } #ifdef CONFIG_BLK_DEV_IDEATAPI switch (drive->media) { case ide_disk: do_rw_disk (drive, rq, block); return; #ifdef CONFIG_BLK_DEV_IDECD case ide_cdrom: ide_do_rw_cdrom (drive, block); return; #endif /* CONFIG_BLK_DEV_IDECD */ #ifdef CONFIG_BLK_DEV_IDETAPE case ide_tape: idetape_do_request (drive, rq, block); return; #endif /* CONFIG_BLK_DEV_IDETAPE */ #ifdef CONFIG_BLK_DEV_IDEFLOPPY case ide_floppy: idefloppy_do_request (drive, rq, block); return; #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ #ifdef CONFIG_BLK_DEV_IDESCSI case ide_scsi: idescsi_do_request (drive, rq, block); return; #endif /* CONFIG_BLK_DEV_IDESCSI */ default: printk("%s: media type %d not supported\n", drive->name, drive->media); goto kill_rq; } #else do_rw_disk (drive, rq, block); /* simpler and faster */ return; #endif /* CONFIG_BLK_DEV_IDEATAPI */ } do_special(drive); return; kill_rq: ide_end_request(0, hwif->hwgroup); } /* * The driver enables interrupts as much as possible. In order to do this, * (a) the device-interrupt is always masked before entry, and * (b) the timeout-interrupt is always disabled before entry. * * If we enter here from, say irq14, and then start a new request for irq15, * (possible with "serialize" option) then we cannot ensure that we exit * before the irq15 hits us. So, we must be careful not to let this bother us. * * Interrupts are still masked (by default) whenever we are exchanging * data/cmds with a drive, because some drives seem to have very poor * tolerance for latency during I/O. For devices which don't suffer from * this problem (most don't), the unmask flag can be set using the "hdparm" * utility, to permit other interrupts during data/cmd transfers. */ void ide_do_request (ide_hwgroup_t *hwgroup) { cli(); /* paranoia */ if (hwgroup->handler != NULL) { printk("%s: EEeekk!! handler not NULL in ide_do_request()\n", hwgroup->hwif->name); return; } do { ide_hwif_t *hwif = hwgroup->hwif; struct request *rq; if ((rq = hwgroup->rq) == NULL) { if (hwif->sharing_irq && hwgroup->drive) /* set nIEN */ OUT_BYTE(hwgroup->drive->ctl|2,hwif->ctl_port); /* * hwgroup->next_hwif is different from hwgroup->hwif * only when a request is inserted using "ide_next". * This saves wear and tear on IDE tapes. */ hwif = hwgroup->next_hwif; do { rq = blk_dev[hwif->major].current_request; if (rq != NULL && rq->rq_status != RQ_INACTIVE) goto got_rq; } while ((hwif = hwif->next) != hwgroup->next_hwif); hwgroup->active = 0; return; /* no work left for this hwgroup */ } got_rq: do_request(hwgroup->hwif = hwgroup->next_hwif = hwif, hwgroup->rq = rq); cli(); } while (hwgroup->handler == NULL); } /* * do_hwgroup_request() invokes ide_do_request() after first masking * all possible interrupts for the current hwgroup. This prevents race * conditions in the event that an unexpected interrupt occurs while * we are in the driver. * * Note that when an interrupt is used to reenter the driver, the first level * handler will already have masked the irq that triggered, but any other ones * for the hwgroup will still be unmasked. The driver tries to be careful * about such things. */ static void do_hwgroup_request (ide_hwgroup_t *hwgroup) { if (hwgroup->handler == NULL) { ide_hwif_t *hgif = hwgroup->hwif; ide_hwif_t *hwif = hgif; hwgroup->active = 1; do { disable_irq(hwif->irq); } while ((hwif = hwif->next) != hgif); ide_do_request (hwgroup); do { enable_irq(hwif->irq); } while ((hwif = hwif->next) != hgif); } } static void do_ide0_request (void) /* invoked with cli() */ { do_hwgroup_request (ide_hwifs[0].hwgroup); } #if MAX_HWIFS > 1 static void do_ide1_request (void) /* invoked with cli() */ { do_hwgroup_request (ide_hwifs[1].hwgroup); } #endif #if MAX_HWIFS > 2 static void do_ide2_request (void) /* invoked with cli() */ { do_hwgroup_request (ide_hwifs[2].hwgroup); } #endif #if MAX_HWIFS > 3 static void do_ide3_request (void) /* invoked with cli() */ { do_hwgroup_request (ide_hwifs[3].hwgroup); } #endif #if MAX_HWIFS > 4 static void do_ide4_request (void) /* invoked with cli() */ { do_hwgroup_request (ide_hwifs[4].hwgroup); } #endif #if MAX_HWIFS > 5 static void do_ide5_request (void) /* invoked with cli() */ { do_hwgroup_request (ide_hwifs[5].hwgroup); } #endif static void timer_expiry (unsigned long data) { ide_hwgroup_t *hwgroup = (ide_hwgroup_t *) data; ide_drive_t *drive = hwgroup->drive; unsigned long flags; save_flags(flags); cli(); if (hwgroup->poll_timeout != 0) { /* polling in progress? */ ide_handler_t *handler = hwgroup->handler; hwgroup->handler = NULL; handler(drive); } else if (hwgroup->handler == NULL) { /* not waiting for anything? */ sti(); /* drive must have responded just as the timer expired */ printk("%s: marginal timeout\n", drive->name); } else { hwgroup->handler = NULL; /* abort the operation */ if (hwgroup->hwif->dmaproc) (void) hwgroup->hwif->dmaproc (ide_dma_abort, drive); ide_error(drive, "irq timeout", GET_STAT()); } if (hwgroup->handler == NULL) do_hwgroup_request (hwgroup); restore_flags(flags); } /* * There's nothing really useful we can do with an unexpected interrupt, * other than reading the status register (to clear it), and logging it. * There should be no way that an irq can happen before we're ready for it, * so we needn't worry much about losing an "important" interrupt here. * * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the * drive enters "idle", "standby", or "sleep" mode, so if the status looks * "good", we just ignore the interrupt completely. * * This routine assumes cli() is in effect when called. * * If an unexpected interrupt happens on irq15 while we are handling irq14 * and if the two interfaces are "serialized" (CMD640), then it looks like * we could screw up by interfering with a new request being set up for irq15. * * In reality, this is a non-issue. The new command is not sent unless the * drive is ready to accept one, in which case we know the drive is not * trying to interrupt us. And ide_set_handler() is always invoked before * completing the issuance of any new drive command, so we will not be * accidently invoked as a result of any valid command completion interrupt. * */ static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup) { byte stat; unsigned int unit; ide_hwif_t *hwif = hwgroup->hwif; /* * handle the unexpected interrupt */ do { if (hwif->irq == irq) { for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; if (!drive->present) continue; SELECT_DRIVE(hwif,drive); udelay(100); /* Ugly, but wait_stat() may not be safe here */ if (!OK_STAT(stat=GET_STAT(), drive->ready_stat, BAD_STAT)) { /* Try to not flood the console with msgs */ static unsigned long last_msgtime = 0; if ((last_msgtime + (HZ/2)) < jiffies) { last_msgtime = jiffies; (void) ide_dump_status(drive, "unexpected_intr", stat); } } if ((stat & DRQ_STAT)) try_to_flush_leftover_data(drive); } } } while ((hwif = hwif->next) != hwgroup->hwif); SELECT_DRIVE(hwif,hwgroup->drive); /* Ugh.. probably interrupts current I/O */ udelay(100); /* Ugly, but wait_stat() may not be safe here */ } /* * entry point for all interrupts, caller does cli() for us */ void ide_intr (int irq, void *dev_id, struct pt_regs *regs) { ide_hwgroup_t *hwgroup = dev_id; ide_handler_t *handler; if (irq == hwgroup->hwif->irq && (handler = hwgroup->handler) != NULL) { ide_drive_t *drive = hwgroup->drive; hwgroup->handler = NULL; del_timer(&(hwgroup->timer)); if (drive->unmask) sti(); handler(drive); cli(); /* this is necessary, as next rq may be different irq */ if (hwgroup->handler == NULL) { SET_RECOVERY_TIMER(HWIF(drive)); ide_do_request(hwgroup); } } else { unexpected_intr(irq, hwgroup); } cli(); } /* * get_info_ptr() returns the (ide_drive_t *) for a given device number. * It returns NULL if the given device number does not match any present drives. */ static ide_drive_t *get_info_ptr (kdev_t i_rdev) { int major = MAJOR(i_rdev); unsigned int h; for (h = 0; h < MAX_HWIFS; ++h) { ide_hwif_t *hwif = &ide_hwifs[h]; if (hwif->present && major == hwif->major) { unsigned unit = DEVICE_NR(i_rdev); if (unit < MAX_DRIVES) { ide_drive_t *drive = &hwif->drives[unit]; if (drive->present) return drive; } else if (major == IDE0_MAJOR && unit < 4) { printk("ide: probable bad entry for /dev/hd%c\n", 'a'+unit); printk("ide: to fix it, run: /usr/src/linux/scripts/MAKEDEV.ide\n"); } break; } } return NULL; } /* * This function is intended to be used prior to invoking ide_do_drive_cmd(). */ void ide_init_drive_cmd (struct request *rq) { rq->buffer = NULL; rq->cmd = IDE_DRIVE_CMD; rq->sector = 0; rq->nr_sectors = 0; rq->current_nr_sectors = 0; rq->sem = NULL; rq->bh = NULL; rq->bhtail = NULL; rq->next = NULL; #if 0 /* these are done each time through ide_do_drive_cmd() */ rq->errors = 0; rq->rq_status = RQ_ACTIVE; rq->rq_dev = ????; #endif } /* * This function issues a special IDE device request * onto the request queue. * * If action is ide_wait, then the rq is queued at the end of the * request queue, and the function sleeps until it has been processed. * This is for use when invoked from an ioctl handler. * * If action is ide_preempt, then the rq is queued at the head of * the request queue, displacing the currently-being-processed * request and this function returns immediately without waiting * for the new rq to be completed. This is VERY DANGEROUS, and is * intended for careful use by the ATAPI tape/cdrom driver code. * * If action is ide_next, then the rq is queued immediately after * the currently-being-processed-request (if any), and the function * returns without waiting for the new rq to be completed. As above, * This is VERY DANGEROUS, and is intended for careful use by the * ATAPI tape/cdrom driver code. * * If action is ide_end, then the rq is queued at the end of the * request queue, and the function returns immediately without waiting * for the new rq to be completed. This is again intended for careful * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c, * when operating in the pipelined operation mode). */ int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action) { unsigned long flags; unsigned int major = HWIF(drive)->major; struct request *cur_rq; struct blk_dev_struct *bdev = &blk_dev[major]; struct semaphore sem = MUTEX_LOCKED; if (IS_PROMISE_DRIVE && rq->buffer != NULL) return -ENOSYS; /* special drive cmds not supported */ rq->errors = 0; rq->rq_status = RQ_ACTIVE; rq->rq_dev = MKDEV(major,(drive->select.b.unit)<<PARTN_BITS); if (action == ide_wait) rq->sem = &sem; unplug_device(bdev); save_flags(flags); cli(); if (action == ide_next) HWGROUP(drive)->next_hwif = HWIF(drive); cur_rq = bdev->current_request; if (cur_rq == NULL || action == ide_preempt) { rq->next = cur_rq; bdev->current_request = rq; if (action == ide_preempt) HWGROUP(drive)->rq = NULL; } else { if (action == ide_wait || action == ide_end) { while (cur_rq->next != NULL) /* find end of list */ cur_rq = cur_rq->next; } rq->next = cur_rq->next; cur_rq->next = rq; } if (!HWGROUP(drive)->active) { do_hwgroup_request(HWGROUP(drive)); cli(); } if (action == ide_wait && rq->rq_status != RQ_INACTIVE) down(&sem); /* wait for it to be serviced */ restore_flags(flags); return rq->errors ? -EIO : 0; /* return -EIO if errors */ } static int ide_open(struct inode * inode, struct file * filp) { ide_drive_t *drive; unsigned long flags; if ((drive = get_info_ptr(inode->i_rdev)) == NULL) return -ENXIO; save_flags(flags); cli(); while (drive->busy) sleep_on(&drive->wqueue); drive->usage++; restore_flags(flags); #ifdef CONFIG_BLK_DEV_IDECD if (drive->media == ide_cdrom) return ide_cdrom_open (inode, filp, drive); #endif /* CONFIG_BLK_DEV_IDECD */ #ifdef CONFIG_BLK_DEV_IDETAPE if (drive->media == ide_tape) return idetape_blkdev_open (inode, filp, drive); #endif /* CONFIG_BLK_DEV_IDETAPE */ #ifdef CONFIG_BLK_DEV_IDEFLOPPY if (drive->media == ide_floppy) return idefloppy_open (inode, filp, drive); #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ #ifdef CONFIG_BLK_DEV_IDESCSI if (drive->media == ide_scsi) return idescsi_open (inode, filp, drive); #endif /* CONFIG_BLK_DEV_IDESCSI */ if (drive->removable && drive->usage == 1) { byte door_lock[] = {WIN_DOORLOCK,0,0,0}; struct request rq; check_disk_change(inode->i_rdev); ide_init_drive_cmd (&rq); rq.buffer = door_lock; /* * Ignore the return code from door_lock, * since the open() has already succeeded, * and the door_lock is irrelevant at this point. */ (void) ide_do_drive_cmd(drive, &rq, ide_wait); } return 0; } /* * Releasing a block device means we sync() it, so that it can safely * be forgotten about... */ static void ide_release(struct inode * inode, struct file * file) { ide_drive_t *drive; if ((drive = get_info_ptr(inode->i_rdev)) != NULL) { fsync_dev(inode->i_rdev); drive->usage--; #ifdef CONFIG_BLK_DEV_IDECD if (drive->media == ide_cdrom) { ide_cdrom_release (inode, file, drive); return; } #endif /* CONFIG_BLK_DEV_IDECD */ #ifdef CONFIG_BLK_DEV_IDETAPE if (drive->media == ide_tape) { idetape_blkdev_release (inode, file, drive); return; } #endif /* CONFIG_BLK_DEV_IDETAPE */ #ifdef CONFIG_BLK_DEV_IDEFLOPPY if (drive->media == ide_floppy) { idefloppy_release (inode, file, drive); return; } #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ #ifdef CONFIG_BLK_DEV_IDESCSI if (drive->media == ide_scsi) { idescsi_ide_release (inode, file, drive); return; } #endif /* CONFIG_BLK_DEV_IDESCSI */ if (drive->removable && !drive->usage) { byte door_unlock[] = {WIN_DOORUNLOCK,0,0,0}; struct request rq; invalidate_buffers(inode->i_rdev); ide_init_drive_cmd (&rq); rq.buffer = door_unlock; (void) ide_do_drive_cmd(drive, &rq, ide_wait); } } } /* * This routine is called to flush all partitions and partition tables * for a changed disk, and then re-read the new partition table. * If we are revalidating a disk because of a media change, then we * enter with usage == 0. If we are using an ioctl, we automatically have * usage == 1 (we need an open channel to use an ioctl :-), so this * is our limit. */ static int revalidate_disk(kdev_t i_rdev) { ide_drive_t *drive; unsigned int p, major, minor; long flags; if ((drive = get_info_ptr(i_rdev)) == NULL) return -ENODEV; major = MAJOR(i_rdev); minor = drive->select.b.unit << PARTN_BITS; save_flags(flags); cli(); if (drive->busy || (drive->usage > 1)) { restore_flags(flags); return -EBUSY; }; drive->busy = 1; restore_flags(flags); for (p = 0; p < (1<<PARTN_BITS); ++p) { if (drive->part[p].nr_sects > 0) { kdev_t devp = MKDEV(major, minor+p); fsync_dev (devp); invalidate_inodes (devp); invalidate_buffers (devp); set_blocksize(devp, 1024); } drive->part[p].start_sect = 0; drive->part[p].nr_sects = 0; }; drive->part[0].nr_sects = current_capacity(drive); if ((drive->media != ide_disk && drive->media != ide_floppy) || !drive->part[0].nr_sects) drive->part[0].start_sect = -1; resetup_one_dev(HWIF(drive)->gd, drive->select.b.unit); drive->busy = 0; wake_up(&drive->wqueue); return 0; } static int write_fs_long (unsigned long useraddr, long value) { int err; if (NULL == (long *)useraddr) return -EINVAL; if ((err = verify_area(VERIFY_WRITE, (long *)useraddr, sizeof(long)))) return err; put_user((unsigned)value, (long *) useraddr); return 0; } static int ide_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { int err; ide_drive_t *drive; unsigned long flags; struct request rq; if (!inode || !(inode->i_rdev)) return -EINVAL; if ((drive = get_info_ptr(inode->i_rdev)) == NULL) return -ENODEV; ide_init_drive_cmd (&rq); switch (cmd) { case HDIO_GETGEO: { struct hd_geometry *loc = (struct hd_geometry *) arg; if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL; err = verify_area(VERIFY_WRITE, loc, sizeof(*loc)); if (err) return err; put_user(drive->bios_head, (byte *) &loc->heads); put_user(drive->bios_sect, (byte *) &loc->sectors); put_user(drive->bios_cyl, (unsigned short *) &loc->cylinders); put_user((unsigned)drive->part[MINOR(inode->i_rdev)&PARTN_MASK].start_sect, (unsigned long *) &loc->start); return 0; } case BLKFLSBUF: if (!suser()) return -EACCES; fsync_dev(inode->i_rdev); invalidate_buffers(inode->i_rdev); return 0; case BLKRASET: if (!suser()) return -EACCES; if(arg > 0xff) return -EINVAL; read_ahead[MAJOR(inode->i_rdev)] = arg; return 0; case BLKRAGET: return write_fs_long(arg, read_ahead[MAJOR(inode->i_rdev)]); case BLKGETSIZE: /* Return device size */ return write_fs_long(arg, drive->part[MINOR(inode->i_rdev)&PARTN_MASK].nr_sects); case BLKRRPART: /* Re-read partition tables */ if (!suser()) return -EACCES; return revalidate_disk(inode->i_rdev); case HDIO_GET_KEEPSETTINGS: return write_fs_long(arg, drive->keep_settings); case HDIO_GET_UNMASKINTR: return write_fs_long(arg, drive->unmask); case HDIO_GET_DMA: return write_fs_long(arg, drive->using_dma); case HDIO_GET_32BIT: return write_fs_long(arg, drive->io_32bit); case HDIO_GET_MULTCOUNT: return write_fs_long(arg, drive->mult_count); case HDIO_OBSOLETE_IDENTITY: case HDIO_GET_IDENTITY: if (!arg || (MINOR(inode->i_rdev) & PARTN_MASK)) return -EINVAL; if (drive->id == NULL) return -ENOMSG; err = verify_area(VERIFY_WRITE, (char *)arg, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142); if (!err) memcpy_tofs((char *)arg, (char *)drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142); return err; case HDIO_GET_NOWERR: return write_fs_long(arg, drive->bad_wstat == BAD_R_STAT); case HDIO_SET_DMA: if (!suser()) return -EACCES; #ifdef CONFIG_BLK_DEV_IDECD if (drive->media == ide_cdrom) return -EPERM; #endif /* CONFIG_BLK_DEV_IDECD */ if (!drive->id || !(drive->id->capability & 1) || !HWIF(drive)->dmaproc) return -EPERM; case HDIO_SET_KEEPSETTINGS: case HDIO_SET_UNMASKINTR: case HDIO_SET_NOWERR: if (arg > 1) return -EINVAL; case HDIO_SET_32BIT: if (!suser()) return -EACCES; if ((MINOR(inode->i_rdev) & PARTN_MASK)) return -EINVAL; save_flags(flags); cli(); switch (cmd) { case HDIO_SET_DMA: if (!(HWIF(drive)->dmaproc)) { restore_flags(flags); return -EPERM; } drive->using_dma = arg; break; case HDIO_SET_KEEPSETTINGS: drive->keep_settings = arg; break; case HDIO_SET_UNMASKINTR: if (arg && drive->no_unmask) { restore_flags(flags); return -EPERM; } drive->unmask = arg; break; case HDIO_SET_NOWERR: drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; break; case HDIO_SET_32BIT: if (arg > (1 + (SUPPORT_VLB_SYNC<<1))) { restore_flags(flags); return -EINVAL; } if (arg && drive->no_io_32bit) { restore_flags(flags); return -EPERM; } 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 */ break; } restore_flags(flags); return 0; case HDIO_SET_MULTCOUNT: if (!suser()) return -EACCES; if (MINOR(inode->i_rdev) & PARTN_MASK) return -EINVAL; if (drive->id && arg > drive->id->max_multsect) return -EINVAL; save_flags(flags); cli(); if (drive->special.b.set_multmode) { restore_flags(flags); return -EBUSY; } drive->mult_req = arg; drive->special.b.set_multmode = 1; restore_flags(flags); (void) ide_do_drive_cmd (drive, &rq, ide_wait); return (drive->mult_count == arg) ? 0 : -EIO; case HDIO_DRIVE_CMD: { byte args[4], *argbuf = args; int argsize = 4; if (!suser() || securelevel > 0) return -EACCES; if (NULL == (void *) arg) { err = ide_do_drive_cmd(drive, &rq, ide_wait); } else if (!(err = verify_area(VERIFY_READ,(void *)arg, 4))) { memcpy_fromfs(args, (void *)arg, 4); if (args[3]) { argsize = 4 + (SECTOR_WORDS * 4 * args[3]); argbuf = kmalloc(argsize, GFP_KERNEL); if (argbuf == NULL) return -ENOMEM; argbuf[0] = args[0]; argbuf[1] = args[1]; argbuf[2] = args[2]; argbuf[3] = args[3]; } if (!(err = verify_area(VERIFY_WRITE,(void *)arg, argsize))) { if ((args[0] == WIN_SETFEATURES) && (args[1] > 66) && (args[2] == 3) && ((drive->id->word93 & 0x2000) == 0)) { printk("%s: Speed warnings UDMA 3/4 is not functional.\n", drive->name); goto abort_speed; } rq.buffer = argbuf; err = ide_do_drive_cmd(drive, &rq, ide_wait); memcpy_tofs((void *)arg, argbuf, argsize); } abort_speed: if (argsize > 4) kfree(argbuf); } return err; } case HDIO_SET_PIO_MODE: if (!suser()) return -EACCES; if (MINOR(inode->i_rdev) & PARTN_MASK) return -EINVAL; if (!HWIF(drive)->tuneproc) return -ENOSYS; save_flags(flags); cli(); if (drive->special.b.set_tune) { restore_flags(flags); return -EBUSY; } drive->tune_req = (byte) arg; drive->special.b.set_tune = 1; restore_flags(flags); (void) ide_do_drive_cmd (drive, &rq, ide_wait); return 0; RO_IOCTLS(inode->i_rdev, arg); default: #ifdef CONFIG_BLK_DEV_IDECD if (drive->media == ide_cdrom) return ide_cdrom_ioctl(drive, inode, file, cmd, arg); #endif /* CONFIG_BLK_DEV_IDECD */ #ifdef CONFIG_BLK_DEV_IDETAPE if (drive->media == ide_tape) return idetape_blkdev_ioctl(drive, inode, file, cmd, arg); #endif /* CONFIG_BLK_DEV_IDETAPE */ #ifdef CONFIG_BLK_DEV_IDEFLOPPY if (drive->media == ide_floppy) return idefloppy_ioctl(drive, inode, file, cmd, arg); #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ #ifdef CONFIG_BLK_DEV_IDESCSI if (drive->media == ide_scsi) return idescsi_ioctl(drive, inode, file, cmd, arg); #endif /* CONFIG_BLK_DEV_IDESCSI */ return -EPERM; } } static int ide_check_media_change (kdev_t i_rdev) { ide_drive_t *drive; if ((drive = get_info_ptr(i_rdev)) == NULL) return -ENODEV; #ifdef CONFIG_BLK_DEV_IDECD if (drive->media == ide_cdrom) return ide_cdrom_check_media_change (drive); #endif /* CONFIG_BLK_DEV_IDECD */ #ifdef CONFIG_BLK_DEV_IDEFLOPPY if (drive->media == ide_floppy) return idefloppy_media_change (drive); #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ if (drive->removable) /* for disks */ return 1; /* always assume it was changed */ return 0; } void ide_fixstring (byte *s, const int bytecount, const int byteswap) { byte *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ if (byteswap) { /* convert from big-endian to host byte order */ for (p = end ; p != s;) { unsigned short *pp = (unsigned short *) (p -= 2); *pp = ntohs(*pp); } } /* strip leading blanks */ while (s != end && *s == ' ') ++s; /* compress internal blanks and strip trailing blanks */ while (s != end && *s) { if (*s++ != ' ' || (s != end && *s && *s != ' ')) *p++ = *(s-1); } /* wipe out trailing garbage */ while (p != end) *p++ = '\0'; } static inline void do_identify (ide_drive_t *drive, byte cmd) { int bswap; struct hd_driveid *id; unsigned long capacity, check; id = drive->id = kmalloc (SECTOR_WORDS*4, GFP_KERNEL); ide_input_data(drive, id, SECTOR_WORDS);/* read 512 bytes of id info */ sti(); #if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) /* * EATA SCSI controllers do a hardware ATA emulation: * Ignore them if there is a driver for them available. */ if ((id->model[0] == 'P' && id->model[1] == 'M') || (id->model[0] == 'S' && id->model[1] == 'K')) { printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); drive->present = 0; return; } #endif /* * WIN_IDENTIFY returns little-endian info, * WIN_PIDENTIFY *usually* returns little-endian info. */ bswap = 1; if (cmd == WIN_PIDENTIFY) { if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ bswap = 0; /* Vertos drives may still be weird */ } ide_fixstring (id->model, sizeof(id->model), bswap); ide_fixstring (id->fw_rev, sizeof(id->fw_rev), bswap); ide_fixstring (id->serial_no, sizeof(id->serial_no), bswap); if (strstr(id->model, "E X A B Y T E N E S T")) return; #ifdef CONFIG_BLK_DEV_IDEATAPI /* * Check for an ATAPI device */ if (cmd == WIN_PIDENTIFY) { byte type = (id->config >> 8) & 0x1f; printk("%s: %s, ATAPI ", drive->name, id->model); #ifdef CONFIG_BLK_DEV_PROMISE if (HWIF(drive)->is_promise2) { printk(" -- not supported on 2nd Promise port\n"); drive->present = 0; return; } #endif /* CONFIG_BLK_DEV_PROMISE */ if (!drive->ide_scsi) switch (type) { case 0: if (!strstr(id->model, "oppy") && !strstr(id->model, "poyp") && !strstr(id->model, "ZIP")) printk("cdrom or floppy?, assuming "); if (drive->media != ide_cdrom && !strstr(id->model, "CD-ROM")) { #ifdef CONFIG_BLK_DEV_IDEFLOPPY printk("FLOPPY drive\n"); drive->media = ide_floppy; if (idefloppy_identify_device(drive, id)) drive->present = 1; return; #else printk("FLOPPY "); break; #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ } /* Early cdrom models used zero */ case 5: #ifdef CONFIG_BLK_DEV_IDECD printk ("CDROM drive\n"); drive->media = ide_cdrom; drive->present = 1; drive->removable = 1; return; #else printk ("CDROM "); break; #endif /* CONFIG_BLK_DEV_IDECD */ case 1: #ifdef CONFIG_BLK_DEV_IDETAPE printk ("TAPE drive"); if (idetape_identify_device (drive,id)) { drive->media = ide_tape; drive->present = 1; drive->removable = 1; if (drive->autotune != 2 && HWIF(drive)->dmaproc != NULL) { if (!HWIF(drive)->dmaproc(ide_dma_check, drive)) printk(", DMA"); } printk("\n"); } else { drive->present = 0; printk ("\nide-tape: the tape is not supported by this version of the driver\n"); } return; #else printk ("TAPE "); break; #endif /* CONFIG_BLK_DEV_IDETAPE */ default: drive->present = 0; printk("Type %d - Unknown device\n", type); return; } #ifdef CONFIG_BLK_DEV_IDESCSI printk("drive - enabling SCSI emulation\n"); drive->media = ide_scsi; drive->present = 1; idescsi_setup(drive); #else drive->present = 0; printk("- not supported by this kernel\n"); #endif /* CONFIG_BLK_DEV_IDESCSI */ return; } #endif /* CONFIG_BLK_DEV_IDEATAPI */ /* check for removable disks (eg. SYQUEST), ignore 'WD' drives */ if (id->config & (1<<7)) { /* removable disk ? */ if (id->model[0] != 'W' || id->model[1] != 'D') drive->removable = 1; } /* SunDisk drives: treat as non-removable, force one unit */ if (id->model[0] == 'S' && id->model[1] == 'u') { drive->removable = 0; if (drive->select.all & (1<<4)) { drive->present = 0; return; } } drive->media = ide_disk; /* Extract geometry if we did not already have one for the drive */ if (!drive->present) { drive->present = 1; drive->cyl = drive->bios_cyl = id->cyls; drive->head = drive->bios_head = id->heads; drive->sect = drive->bios_sect = id->sectors; } /* Handle logical geometry translation by the drive */ if ((id->field_valid & 1) && id->cur_cyls && id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { /* * Extract the physical drive geometry for our use. * Note that we purposely do *not* update the bios info. * This way, programs that use it (like fdisk) will * still have the same logical view as the BIOS does, * which keeps the partition table from being screwed. * * An exception to this is the cylinder count, * which we reexamine later on to correct for 1024 limitations. */ drive->cyl = id->cur_cyls; drive->head = id->cur_heads; drive->sect = id->cur_sectors; /* check for word-swapped "capacity" field in id information */ capacity = drive->cyl * drive->head * drive->sect; check = (id->cur_capacity0 << 16) | id->cur_capacity1; if (check == capacity) { /* was it swapped? */ /* yes, bring it into little-endian order: */ id->cur_capacity0 = (capacity >> 0) & 0xffff; id->cur_capacity1 = (capacity >> 16) & 0xffff; } } /* Use physical geometry if what we have still makes no sense */ if ((!drive->head || drive->head > 16) && id->heads && id->heads <= 16) { drive->cyl = id->cyls; drive->head = id->heads; drive->sect = id->sectors; } /* calculate drive capacity, and select LBA if possible */ capacity = current_capacity (drive); /* * if possible, give fdisk access to more of the drive, * by correcting bios_cyls: */ if (capacity > drive->bios_cyl * drive->bios_head * drive->bios_sect && !drive->forced_geom && drive->bios_sect && drive->bios_head) { int cyl = (capacity / drive->bios_sect) / drive->bios_head; if (cyl <= 65535) drive->bios_cyl = cyl; else { /* OK until 539 GB */ drive->bios_sect = 63; drive->bios_head = 255; drive->bios_cyl = capacity / (63*255); } } if (!strncmp(id->model, "BMI ", 4) && strstr(id->model, " ENHANCED IDE ") && drive->select.b.lba) drive->no_geom = 1; drive->mult_count = 0; if (id->max_multsect) { #ifdef CONFIG_IDEDISK_MULTI_MODE id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; id->multsect_valid = id->multsect ? 1 : 0; drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT; drive->special.b.set_multmode = drive->mult_req ? 1 : 0; #else /* original, pre IDE-NFG, per request of AC */ drive->mult_req = INITIAL_MULT_COUNT; if (drive->mult_req > id->max_multsect) drive->mult_req = id->max_multsect; if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) drive->special.b.set_multmode = 1; #endif } drive->no_io_32bit = id->dword_io ? 1 : 0; if (drive->autotune != 2 && HWIF(drive)->dmaproc != NULL) { (void) HWIF(drive)->dmaproc(ide_dma_check, drive); } printk ("%s: %.40s, %ldMB w/%dkB Cache, CHS=%d/%d/%d", drive->name, id->model, capacity/2048L, id->buf_size/2, drive->bios_cyl, drive->bios_head, drive->bios_sect); if (drive->using_dma) { if ((id->field_valid & 4) && (id->word93 & 0x2000) && (id->dma_ultra & (id->dma_ultra >> 11) & 3)) { printk(", UDMA(66)"); /* UDMA BIOS-enabled! */ } else if ((id->field_valid & 4) && (id->dma_ultra & (id->dma_ultra >> 8) & 7)) { printk(", UDMA(33)"); /* UDMA BIOS-enabled! */ } else if (id->field_valid & 4) { printk(", (U)DMA"); /* Can be BIOS-enabled! */ } else { printk(", DMA"); } } printk("\n"); } /* * Delay for *at least* 50ms. As we don't know how much time is left * until the next tick occurs, we wait an extra tick to be safe. * This is used only during the probing/polling for drives at boot time. */ static void delay_50ms (void) { unsigned long timer = jiffies + ((HZ + 19)/20) + 1; while (timer > jiffies); } /* * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive * and waits for a response. It also monitors irqs while this is * happening, in hope of automatically determining which one is * being used by the interface. * * Returns: 0 device was identified * 1 device timed-out (no response to identify request) * 2 device aborted the command (refused to identify itself) */ static int try_to_identify (ide_drive_t *drive, byte cmd) { int hd_status, rc; unsigned long timeout; unsigned long irqs_on = 0; int irq_off; if (!HWIF(drive)->irq) { /* already got an IRQ? */ probe_irq_off(probe_irq_on()); /* clear dangling irqs */ irqs_on = probe_irq_on(); /* start monitoring irqs */ OUT_BYTE(drive->ctl,IDE_CONTROL_REG); /* enable device irq */ } delay_50ms(); /* take a deep breath */ if ((IN_BYTE(IDE_ALTSTATUS_REG) ^ IN_BYTE(IDE_STATUS_REG)) & ~INDEX_STAT) { printk("%s: probing with STATUS instead of ALTSTATUS\n", drive->name); hd_status = IDE_STATUS_REG; /* ancient Seagate drives */ } else hd_status = IDE_ALTSTATUS_REG; /* use non-intrusive polling */ /* set features register for atapi identify command */ if ((cmd == WIN_PIDENTIFY)) OUT_BYTE(0,IDE_FEATURE_REG); /* disable dma & overlap mode */ #if CONFIG_BLK_DEV_PROMISE if (IS_PROMISE_DRIVE) { if (promise_cmd(drive,PROMISE_IDENTIFY)) { if (irqs_on) (void) probe_irq_off(irqs_on); return 1; } } else #endif /* CONFIG_BLK_DEV_PROMISE */ OUT_BYTE(cmd,IDE_COMMAND_REG); /* ask drive for ID */ timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; timeout += jiffies; do { if (jiffies > timeout) { if (irqs_on) (void) probe_irq_off(irqs_on); return 1; /* drive timed-out */ } delay_50ms(); /* give drive a breather */ } while (IN_BYTE(hd_status) & BUSY_STAT); delay_50ms(); /* wait for IRQ and DRQ_STAT */ if (OK_STAT(GET_STAT(),DRQ_STAT,BAD_R_STAT)) { unsigned long flags; save_flags(flags); cli(); /* some systems need this */ do_identify(drive, cmd); /* drive returned ID */ rc = 0; /* drive responded with ID */ (void) GET_STAT(); /* clear drive IRQ */ restore_flags(flags); } else rc = 2; /* drive refused ID */ if (!HWIF(drive)->irq) { irq_off = probe_irq_off(irqs_on); /* get our irq number */ if (irq_off > 0) { HWIF(drive)->irq = irq_off; /* save it for later */ irqs_on = probe_irq_on(); OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG); /* mask device irq */ udelay(5); (void) probe_irq_off(irqs_on); (void) probe_irq_off(probe_irq_on()); /* clear self-inflicted irq */ (void) GET_STAT(); /* clear drive IRQ */ } else { /* Mmmm.. multiple IRQs.. don't know which was ours */ printk("%s: IRQ probe failed (%d)\n", drive->name, irq_off); #ifdef CONFIG_BLK_DEV_CMD640 #ifdef CMD640_DUMP_REGS if (HWIF(drive)->chipset == ide_cmd640) { printk("%s: Hmmm.. probably a driver problem.\n", drive->name); CMD640_DUMP_REGS; } #endif /* CMD640_DUMP_REGS */ #endif /* CONFIG_BLK_DEV_CMD640 */ } } return rc; } /* * do_probe() has the difficult job of finding a drive if it exists, * without getting hung up if it doesn't exist, without trampling on * ethernet cards, and without leaving any IRQs dangling to haunt us later. * * If a drive is "known" to exist (from CMOS or kernel parameters), * but does not respond right away, the probe will "hang in there" * for the maximum wait time (about 30 seconds), otherwise it will * exit much more quickly. * * Returns: 0 device was identified * 1 device timed-out (no response to identify request) * 2 device aborted the command (refused to identify itself) * 3 bad status from device (possible for ATAPI drives) * 4 probe was not attempted because failure was obvious */ static int do_probe (ide_drive_t *drive, byte cmd) { int rc; ide_hwif_t *hwif = HWIF(drive); unsigned long timeout; #ifdef CONFIG_BLK_DEV_IDEATAPI if (drive->present) { /* avoid waiting for inappropriate probes */ if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) return 4; } #endif /* CONFIG_BLK_DEV_IDEATAPI */ #ifdef DEBUG printk("probing for %s: present=%d, media=%d, probetype=%s\n", drive->name, drive->present, drive->media, (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); #endif SELECT_DRIVE(hwif,drive); delay_50ms(); if (IN_BYTE(IDE_SELECT_REG) != drive->select.all && !drive->present) { OUT_BYTE(0xa0,IDE_SELECT_REG); /* exit with drive0 selected */ delay_50ms(); /* allow BUSY_STAT to assert & clear */ return 3; /* no i/f present: avoid killing ethernet cards */ } if (OK_STAT(GET_STAT(),READY_STAT,BUSY_STAT) || drive->present || cmd == WIN_PIDENTIFY) { if ((rc = try_to_identify(drive,cmd))) /* send cmd and wait */ rc = try_to_identify(drive,cmd); /* failed: try again */ if (rc == 1 && cmd == WIN_PIDENTIFY && drive->autotune != 2) { printk("%s: no response (status = 0x%02x), resetting drive\n", drive->name, GET_STAT()); delay_50ms(); OUT_BYTE (drive->select.all, IDE_SELECT_REG); delay_50ms(); OUT_BYTE(WIN_SRST, IDE_COMMAND_REG); timeout = jiffies; while ((GET_STAT() & BUSY_STAT) && jiffies < timeout + WAIT_WORSTCASE) delay_50ms(); rc = try_to_identify(drive, cmd); } if (rc == 1) printk("%s: no response (status = 0x%02x)\n", drive->name, GET_STAT()); (void) GET_STAT(); /* ensure drive irq is clear */ } else { rc = 3; /* not present or maybe ATAPI */ } if (drive->select.b.unit != 0) { OUT_BYTE(0xa0,IDE_SELECT_REG); /* exit with drive0 selected */ delay_50ms(); (void) GET_STAT(); /* ensure drive irq is clear */ } return rc; } static void enable_nest (ide_drive_t *drive) { unsigned long timeout; printk("%s: enabling %s -- ", HWIF(drive)->name, drive->id->model); SELECT_DRIVE(HWIF(drive), drive); delay_50ms(); OUT_BYTE(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); timeout = jiffies + WAIT_WORSTCASE; do { if (jiffies > timeout) { printk("failed (timeout)\n"); return; } delay_50ms(); } while (GET_STAT() & BUSY_STAT); delay_50ms(); if (!OK_STAT(GET_STAT(), 0, BAD_STAT)) printk("failed (status = 0x%02x)\n", GET_STAT()); else printk("success\n"); if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */ #ifdef CONFIG_BLK_DEV_IDEATAPI (void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */ #endif /* CONFIG_BLK_DEV_IDEATAPI */ } } /* * probe_for_drive() tests for existence of a given drive using do_probe(). * * Returns: 0 no device was found * 1 device was found (note: drive->present might still be 0) */ static inline byte probe_for_drive (ide_drive_t *drive) { if (drive->noprobe) /* skip probing? */ return drive->present; if (do_probe(drive, WIN_IDENTIFY) >= 2) { /* if !(success||timed-out) */ #ifdef CONFIG_BLK_DEV_IDEATAPI (void) do_probe(drive, WIN_PIDENTIFY); /* look for ATAPI device */ #endif /* CONFIG_BLK_DEV_IDEATAPI */ } if (drive->id && strstr(drive->id->model, "E X A B Y T E N E S T")) enable_nest(drive); if (!drive->present) return 0; /* drive not found */ if (drive->id == NULL) { /* identification failed? */ if (drive->media == ide_disk) { printk ("%s: non-IDE drive, CHS=%d/%d/%d\n", drive->name, drive->cyl, drive->head, drive->sect); } #ifdef CONFIG_BLK_DEV_IDECD else if (drive->media == ide_cdrom) { printk("%s: ATAPI cdrom (?)\n", drive->name); } #endif /* CONFIG_BLK_DEV_IDECD */ else { drive->present = 0; /* nuke it */ } } return 1; /* drive was found */ } /* * We query CMOS about hard disks : it could be that we have a SCSI/ESDI/etc * controller that is BIOS compatible with ST-506, and thus showing up in our * BIOS table, but not register compatible, and therefore not present in CMOS. * * Furthermore, we will assume that our ST-506 drives <if any> are the primary * drives in the system -- the ones reflected as drive 1 or 2. The first * drive is stored in the high nibble of CMOS byte 0x12, the second in the low * nibble. This will be either a 4 bit drive type or 0xf indicating use byte * 0x19 for an 8 bit type, drive 1, 0x1a for drive 2 in CMOS. A non-zero value * means we have an AT controller hard disk for that drive. * * Of course, there is no guarantee that either drive is actually on the * "primary" IDE interface, but we don't bother trying to sort that out here. * If a drive is not actually on the primary interface, then these parameters * will be ignored. This results in the user having to supply the logical * drive geometry as a boot parameter for each drive not on the primary i/f. * * The only "perfect" way to handle this would be to modify the setup.[cS] code * to do BIOS calls Int13h/Fn08h and Int13h/Fn48h to get all of the drive info * for us during initialization. I have the necessary docs -- any takers? -ml * [I did this. But the result is more suited for user space. -aeb] * * Unfortunately the above is far too optimistic. One of the problems is that * drives 1 and 2 may be SCSI disks (even when IDE disks are present), so that * the geometry we read here from BIOS is attributed to the wrong disks. * Eventually the routine below should be removed. */ static void probe_cmos_for_drives (ide_hwif_t *hwif) { #ifdef __i386__ extern struct drive_info_struct drive_info; byte cmos_disks, *BIOS = (byte *) &drive_info; int unit; #ifdef CONFIG_BLK_DEV_PROMISE if (hwif->is_promise2) return; #endif /* CONFIG_BLK_DEV_PROMISE */ outb_p(0x12,0x70); /* specify CMOS address 0x12 */ cmos_disks = inb_p(0x71); /* read the data from 0x12 */ /* Extract drive geometry from CMOS+BIOS if not already setup */ for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; if ((cmos_disks & (0xf0 >> (unit*4))) && !drive->present && !drive->nobios) { drive->cyl = drive->bios_cyl = *(unsigned short *)BIOS; drive->head = drive->bios_head = *(BIOS+2); drive->sect = drive->bios_sect = *(BIOS+14); drive->ctl = *(BIOS+8); drive->present = 1; } BIOS += 16; } #endif } /* * This routine only knows how to look for drive units 0 and 1 * on an interface, so any setting of MAX_DRIVES > 2 won't work here. */ static void probe_hwif (ide_hwif_t *hwif) { unsigned int unit; if (hwif->noprobe) return; if (hwif->io_base == HD_DATA) probe_cmos_for_drives (hwif); #if CONFIG_BLK_DEV_PROMISE if (!hwif->is_promise2 && (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1))) { #else if (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1)) { #endif /* CONFIG_BLK_DEV_PROMISE */ int msgout = 0; for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; if (drive->present) { drive->present = 0; printk("%s: ERROR, PORTS ALREADY IN USE\n", drive->name); msgout = 1; } } if (!msgout) printk("%s: ports already in use, skipping probe\n", hwif->name); } else { unsigned long flags; save_flags(flags); sti(); /* needed for jiffies and irq probing */ /* * Second drive should only exist if first drive was found, * but a lot of cdrom drives are configured as single slaves. */ for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; (void) probe_for_drive (drive); if (drive->present && drive->media == ide_disk) { if ((!drive->head || drive->head > 16) && !drive->select.b.lba) { printk("%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", drive->name, drive->head); drive->present = 0; } } if (drive->present && !hwif->present) { hwif->present = 1; request_region(hwif->io_base, 8, hwif->name); request_region(hwif->ctl_port, 1, hwif->name); } } restore_flags(flags); for (unit = 0; unit < MAX_DRIVES; ++unit) { ide_drive_t *drive = &hwif->drives[unit]; if (drive->present && drive->media != ide_tape) { ide_tuneproc_t *tuneproc = HWIF(drive)->tuneproc; if (tuneproc != NULL && drive->autotune == 1) tuneproc(drive, 255); /* auto-tune PIO mode */ } } } } /* * stridx() returns the offset of c within s, * or -1 if c is '\0' or not found within s. */ static int 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 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; } if (!*s) return n; } return 0; /* zero = nothing matched */ } /* * ide_setup() gets called VERY EARLY during initialization, * to handle kernel "command line" strings beginning with "hdx=" * or "ide". Here is the complete set currently supported: * * "hdx=" is recognized for all "x" from "a" to "h", such as "hdc". * "idex=" is recognized for all "x" from "0" to "3", such as "ide1". * * "hdx=noprobe" : drive may be present, but do not probe for it * "hdx=none" : drive is NOT present, ignore cmos and do not probe * "hdx=nowerr" : ignore the WRERR_STAT bit on this drive * "hdx=cdrom" : drive is present, and is a cdrom drive * "hdx=cyl,head,sect" : disk drive is present, with specified geometry * "hdx=autotune" : driver will attempt to tune interface speed * to the fastest PIO mode supported, * if possible for this drive only. * Not fully supported by all chipset types, * and quite likely to cause trouble with * older/odd IDE drives. * * "idebus=xx" : inform IDE driver of VESA/PCI bus speed in Mhz, * where "xx" is between 20 and 66 inclusive, * used when tuning chipset PIO modes. * For PCI bus, 25 is correct for a P75 system, * 30 is correct for P90,P120,P180 systems, * and 33 is used for P100,P133,P166 systems. * If in doubt, use idebus=33 for PCI. * As for VLB, it is safest to not specify it. * * "idex=noprobe" : do not attempt to access/use this interface * "idex=base" : probe for an interface at the addr specified, * where "base" is usually 0x1f0 or 0x170 * and "ctl" is assumed to be "base"+0x206 * "idex=base,ctl" : specify both base and ctl * "idex=base,ctl,irq" : specify base, ctl, and irq number * "idex=autotune" : driver will attempt to tune interface speed * to the fastest PIO mode supported, * for all drives on this interface. * Not fully supported by all chipset types, * and quite likely to cause trouble with * older/odd IDE drives. * "idex=noautotune" : driver will NOT attempt to tune interface speed * This is the default for most chipsets, * except the cmd640. * "idex=serialize" : do not overlap operations on idex and ide(x^1) * * The following are valid ONLY on ide0, * and the defaults for the base,ctl ports must not be altered. * * "ide0=dtc2278" : probe/support DTC2278 interface * "ide0=ht6560b" : probe/support HT6560B interface * "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip * (not for PCI -- automatically detected) * "ide0=qd6580" : probe/support qd6580 interface * "ide0=ali14xx" : probe/support ali14xx chipsets (ALI M1439, M1443, M1445) * "ide0=umc8672" : probe/support umc8672 chipsets */ void 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); printk("ide_setup: %s", s); init_ide_data (); /* * Look for drive options: "hdx=" */ if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { const char *hd_words[] = {"none", "noprobe", "nowerr", "cdrom", "serialize", "autotune", "noautotune", "slow", "ide-scsi", NULL}; unit = s[2] - 'a'; hw = unit / MAX_DRIVES; unit = unit % MAX_DRIVES; hwif = &ide_hwifs[hw]; drive = &hwif->drives[unit]; switch (match_parm(&s[3], hd_words, vals, 3)) { case -1: /* "none" */ drive->nobios = 1; /* drop into "noprobe" */ case -2: /* "noprobe" */ drive->noprobe = 1; goto done; case -3: /* "nowerr" */ drive->bad_wstat = BAD_R_STAT; hwif->noprobe = 0; goto done; case -4: /* "cdrom" */ drive->present = 1; drive->media = ide_cdrom; hwif->noprobe = 0; goto done; case -5: /* "serialize" */ printk(" -- USE \"ide%d=serialize\" INSTEAD", hw); goto do_serialize; case -6: /* "autotune" */ drive->autotune = 1; goto done; case -7: /* "noautotune" */ drive->autotune = 2; goto done; case -8: /* "slow" */ drive->slow = 1; goto done; case -9: /* "ide-scsi" */ drive->ide_scsi = 1; goto done; case 3: /* cyl,head,sect */ drive->media = ide_disk; drive->cyl = drive->bios_cyl = vals[0]; drive->head = drive->bios_head = vals[1]; drive->sect = drive->bios_sect = vals[2]; drive->present = 1; drive->forced_geom = 1; hwif->noprobe = 0; goto done; default: goto bad_option; } } if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') goto bad_option; /* * Look for bus speed option: "idebus=" */ if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { if (match_parm(&s[6], NULL, vals, 1) != 1) goto bad_option; if (vals[0] >= 20 && vals[0] <= 66) idebus_parameter = vals[0]; else printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); goto done; } /* * Look for interface options: "idex=" */ if (s[3] >= '0' && s[3] <= max_hwif) { /* * Be VERY CAREFUL changing this: note hardcoded indexes below */ const char *ide_words[] = {"noprobe", "serialize", "autotune", "noautotune", "qd6580", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", NULL}; hw = s[3] - '0'; hwif = &ide_hwifs[hw]; i = match_parm(&s[4], ide_words, vals, 3); /* * Cryptic check to ensure chipset not already set for hwif: */ if (i > 0 || i <= -5) { if (hwif->chipset != ide_unknown) goto bad_option; if (i <= -5) { if (ide_hwifs[1].chipset != ide_unknown) goto bad_option; /* * Interface keywords work only for ide0: */ if (hw != 0) goto bad_hwif; } } switch (i) { #ifdef CONFIG_BLK_DEV_PROMISE case -11: /* "dc4030" */ { setup_dc4030(hwif); goto done; } #endif /* CONFIG_BLK_DEV_PROMISE */ #ifdef CONFIG_BLK_DEV_ALI14XX case -10: /* "ali14xx" */ { extern void init_ali14xx (void); init_ali14xx(); goto done; } #endif /* CONFIG_BLK_DEV_ALI14XX */ #ifdef CONFIG_BLK_DEV_UMC8672 case -9: /* "umc8672" */ { extern void init_umc8672 (void); init_umc8672(); goto done; } #endif /* CONFIG_BLK_DEV_UMC8672 */ #ifdef CONFIG_BLK_DEV_DTC2278 case -8: /* "dtc2278" */ { extern void init_dtc2278 (void); init_dtc2278(); goto done; } #endif /* CONFIG_BLK_DEV_DTC2278 */ #ifdef CONFIG_BLK_DEV_CMD640 case -7: /* "cmd640_vlb" */ { extern int cmd640_vlb; /* flag for cmd640.c */ cmd640_vlb = 1; goto done; } #endif /* CONFIG_BLK_DEV_CMD640 */ #ifdef CONFIG_BLK_DEV_HT6560B case -6: /* "ht6560b" */ { extern void init_ht6560b (void); init_ht6560b(); goto done; } #endif /* CONFIG_BLK_DEV_HT6560B */ #if CONFIG_BLK_DEV_QD6580 case -5: /* "qd6580" (has secondary i/f) */ { extern void init_qd6580 (void); init_qd6580(); goto done; } #endif /* CONFIG_BLK_DEV_QD6580 */ case -4: /* "noautotune" */ hwif->drives[0].autotune = 2; hwif->drives[1].autotune = 2; goto done; case -3: /* "autotune" */ hwif->drives[0].autotune = 1; hwif->drives[1].autotune = 1; goto done; case -2: /* "serialize" */ do_serialize: ide_hwifs[hw].serialized = 1; /* serialize */ ide_hwifs[hw^1].serialized = 1; /* with mate */ goto done; case -1: /* "noprobe" */ hwif->noprobe = 1; goto done; case 1: /* base */ vals[1] = vals[0] + 0x206; /* default ctl */ case 2: /* base,ctl */ vals[2] = 0; /* default irq = probe for it */ case 3: /* base,ctl,irq */ hwif->io_base = vals[0]; hwif->ctl_port = vals[1]; hwif->irq = vals[2]; hwif->noprobe = 0; hwif->chipset = ide_generic; goto done; case 0: goto bad_option; default: printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); return; } } bad_option: printk(" -- BAD OPTION\n"); return; bad_hwif: printk("-- NOT SUPPORTED ON ide%d", hw); done: printk("\n"); } /* * This routine is called from the partition-table code in genhd.c * to "convert" a drive to a logical geometry with fewer than 1024 cyls. * * The second parameter, "xparm", determines exactly how the translation * will be handled: * 0 = convert to CHS with fewer than 1024 cyls * using the same method as Ontrack DiskManager. * 1 = same as "0", plus offset everything by 63 sectors. * -1 = similar to "0", plus redirect sector 0 to sector 1. * >1 = convert to a CHS geometry with "xparm" heads. * * Returns 0 if the translation was not possible, if the device was not * an IDE disk drive, or if a geometry was "forced" on the commandline. * Returns 1 if the geometry translation was successful. */ int ide_xlate_1024 (kdev_t i_rdev, int xparm, const char *msg) { ide_drive_t *drive; static const byte head_vals[] = {4, 8, 16, 32, 64, 128, 255, 0}; const byte *heads = head_vals; unsigned long tracks; drive = get_info_ptr(i_rdev); if (!drive) return 0; if (drive->forced_geom) return 0; if (xparm > 1 && xparm <= drive->bios_head && drive->bios_sect == 63) return 0; /* we already have a translation */ printk("%s ", msg); if (xparm < 0 && (drive->bios_cyl * drive->bios_head * drive->bios_sect) < (1024 * 16 * 63)) { return 0; /* small disk: no translation needed */ } if (drive->id) { drive->cyl = drive->id->cyls; drive->head = drive->id->heads; drive->sect = drive->id->sectors; } drive->bios_cyl = drive->cyl; drive->bios_head = drive->head; drive->bios_sect = drive->sect; drive->special.b.set_geometry = 1; tracks = drive->bios_cyl * drive->bios_head * drive->bios_sect / 63; drive->bios_sect = 63; if (xparm > 1) { drive->bios_head = xparm; drive->bios_cyl = tracks / drive->bios_head; } else { while (drive->bios_cyl >= 1024) { drive->bios_head = *heads; drive->bios_cyl = tracks / drive->bios_head; if (0 == *++heads) break; } #if FAKE_FDISK_FOR_EZDRIVE if (xparm == -1) { drive->remap_0_to_1 = 1; msg = "0->1"; } else #endif /* FAKE_FDISK_FOR_EZDRIVE */ if (xparm == 1) { drive->sect0 = 63; drive->bios_cyl = (tracks - 1) / drive->bios_head; msg = "+63"; } printk("[remap %s] ", msg); } drive->part[0].nr_sects = current_capacity(drive); printk("[%d/%d/%d]", drive->bios_cyl, drive->bios_head, drive->bios_sect); return 1; } #if MAX_HWIFS > 1 /* * save_match() is used to simplify logic in init_irq() below. * * A loophole here is that we may not know about a particular * hwif's irq until after that hwif is actually probed/initialized.. * This could be a problem for the case where an hwif is on a * dual interface that requires serialization (eg. cmd640) and another * hwif using one of the same irqs is initialized beforehand. * * This routine detects and reports such situations, but does not fix them. */ static void save_match (ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) { ide_hwif_t *m = *match; if (m && m->hwgroup && m->hwgroup != new->hwgroup) { if (!new->hwgroup) return; printk("%s: potential irq problem with %s and %s\n", hwif->name, new->name, m->name); } if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ *match = new; } #endif /* MAX_HWIFS > 1 */ /* * This routine sets up the irq for an ide interface, and creates a new * hwgroup for the irq/hwif if none was previously assigned. * * Much of the code is for correctly detecting/handling irq sharing * and irq serialization situations. This is somewhat complex because * it handles static as well as dynamic (PCMCIA) IDE interfaces. * * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with * interrupts completely disabled. This can be bad for interrupt latency, * but anything else has led to problems on some machines. We re-enable * interrupts as much as we can safely do in most places. */ static int init_irq (ide_hwif_t *hwif) { unsigned long flags; #if MAX_HWIFS > 1 unsigned int index; #endif /* MAX_HWIFS > 1 */ ide_hwgroup_t *hwgroup; ide_hwif_t *match = NULL; save_flags(flags); cli(); hwif->hwgroup = NULL; #if MAX_HWIFS > 1 /* * Group up with any other hwifs that share our irq(s). */ for (index = 0; index < MAX_HWIFS; index++) { ide_hwif_t *h = &ide_hwifs[index]; if (h->hwgroup) { /* scan only initialized hwif's */ if (hwif->irq == h->irq) { hwif->sharing_irq = h->sharing_irq = 1; save_match(hwif, h, &match); } if (hwif->serialized) { ide_hwif_t *mate = &ide_hwifs[hwif->index^1]; if (index == mate->index || h->irq == mate->irq) save_match(hwif, h, &match); } if (h->serialized) { ide_hwif_t *mate = &ide_hwifs[h->index^1]; if (hwif->irq == mate->irq) save_match(hwif, h, &match); } } } #endif /* MAX_HWIFS > 1 */ /* * If we are still without a hwgroup, then form a new one */ if (match) { hwgroup = match->hwgroup; } else { hwgroup = kmalloc(sizeof(ide_hwgroup_t), GFP_KERNEL); hwgroup->hwif = hwgroup->next_hwif = hwif->next = hwif; hwgroup->rq = NULL; hwgroup->handler = NULL; if (hwif->drives[0].present) hwgroup->drive = &hwif->drives[0]; else hwgroup->drive = &hwif->drives[1]; hwgroup->poll_timeout = 0; hwgroup->active = 0; init_timer(&hwgroup->timer); hwgroup->timer.function = &timer_expiry; hwgroup->timer.data = (unsigned long) hwgroup; } /* * Allocate the irq, if not already obtained for another hwif */ if (!match || match->irq != hwif->irq) { if (request_irq(hwif->irq, ide_intr, SA_INTERRUPT, hwif->name, hwgroup)) { if (!match) kfree(hwgroup); restore_flags(flags); return 1; } } /* * Everything is okay, so link us into the hwgroup */ hwif->hwgroup = hwgroup; hwif->next = hwgroup->hwif->next; hwgroup->hwif->next = hwif; restore_flags(flags); /* safe now that hwif->hwgroup is set up */ printk("%s at 0x%03x-0x%03x,0x%03x on irq %d", hwif->name, hwif->io_base, hwif->io_base+7, hwif->ctl_port, hwif->irq); if (match) printk(" (%sed with %s)", hwif->sharing_irq ? "shar" : "serializ", match->name); printk("\n"); return 0; } static struct file_operations ide_fops = { NULL, /* lseek - default */ block_read, /* read - general block-dev read */ block_write, /* write - general block-dev write */ NULL, /* readdir - bad */ NULL, /* select */ ide_ioctl, /* ioctl */ NULL, /* mmap */ ide_open, /* open */ ide_release, /* release */ block_fsync /* fsync */ ,NULL, /* fasync */ ide_check_media_change, /* check_media_change */ revalidate_disk /* revalidate */ }; #ifdef CONFIG_PCI #if defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON) typedef void (ide_pci_init_proc_t)(byte, byte); /* * ide_probe_pci() scans PCI for a specific vendor/device function, * and invokes the supplied init routine for each instance detected. */ static void ide_probe_pci (unsigned short vendor, unsigned short device, ide_pci_init_proc_t *init, int func_adj) { unsigned long flags; unsigned index; byte fn, bus; save_flags(flags); cli(); for (index = 0; !pcibios_find_device (vendor, device, index, &bus, &fn); ++index) { if ((vendor == PCI_VENDOR_ID_TTI) && (device == PCI_DEVICE_ID_TTI_HPT343) && (func_adj)) { unsigned short pcicmd = 0; pcibios_read_config_word(bus, fn, PCI_COMMAND, &pcicmd); if (pcicmd & PCI_COMMAND_MEMORY) init (bus, fn); else return; } else { init (bus, fn + func_adj); } } restore_flags(flags); } #endif /* defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON) */ #endif /* CONFIG_PCI */ /* * ide_init_pci() finds/initializes "known" PCI IDE interfaces * * This routine should ideally be using pcibios_find_class() to find * all IDE interfaces, but that function causes some systems to "go weird". */ static void probe_for_hwifs (void) { #ifdef CONFIG_PCI /* * Find/initialize PCI IDE interfaces */ if (pcibios_present()) { #ifdef CONFIG_BLK_DEV_RZ1000 ide_pci_init_proc_t init_rz1000; ide_probe_pci (PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000, &init_rz1000, 0); ide_probe_pci (PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001, &init_rz1000, 0); #endif /* CONFIG_BLK_DEV_RZ1000 */ #ifdef CONFIG_BLK_DEV_TRITON /* * Apparently the BIOS32 services on Intel motherboards are * buggy and won't find the PCI_DEVICE_ID_INTEL_82371_1 for us. * So instead, we search for PCI_DEVICE_ID_INTEL_82371_0, * and then add 1. */ #ifdef CONFIG_BLK_DEV_OFFBOARD ide_probe_pci (PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246, &ide_init_triton, 0); ide_probe_pci (PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20262, &ide_init_triton, 0); ide_probe_pci (PCI_VENDOR_ID_ARTOP, PCI_DEVICE_ID_ARTOP_ATP850UF, &ide_init_triton, 0); ide_probe_pci (PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT343, &ide_init_triton, 1); #endif /* CONFIG_BLK_DEV_OFFBOARD */ ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371_0, &ide_init_triton, 1); ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1, &ide_init_triton, 0); ide_probe_pci (PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB, &ide_init_triton, 0); ide_probe_pci (PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_5513, &ide_init_triton, 0); ide_probe_pci (PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, &ide_init_triton, 0); ide_probe_pci (PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5229, &ide_init_triton, 0); #ifndef CONFIG_BLK_DEV_OFFBOARD ide_probe_pci (PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246, &ide_init_triton, 0); ide_probe_pci (PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20262, &ide_init_triton, 0); ide_probe_pci (PCI_VENDOR_ID_ARTOP, PCI_DEVICE_ID_ARTOP_ATP850UF, &ide_init_triton, 0); #endif /* CONFIG_BLK_DEV_OFFBOARD */ ide_probe_pci (PCI_VENDOR_ID_TTI, PCI_DEVICE_ID_TTI_HPT343, &ide_init_triton, 0); #endif /* CONFIG_BLK_DEV_TRITON */ } #endif /* CONFIG_PCI */ #ifdef CONFIG_BLK_DEV_CMD640 { extern void ide_probe_for_cmd640x (void); ide_probe_for_cmd640x(); } #endif #ifdef CONFIG_BLK_DEV_PROMISE init_dc4030(); #endif } static int hwif_init (int h) { ide_hwif_t *hwif = &ide_hwifs[h]; void (*rfn)(void); if (!hwif->present) return 0; if (!hwif->irq) { if (!(hwif->irq = default_irqs[h])) { printk("%s: DISABLED, NO IRQ\n", hwif->name); return (hwif->present = 0); } } #ifdef CONFIG_BLK_DEV_HD if (hwif->irq == HD_IRQ && hwif->io_base != HD_DATA) { printk("%s: CANNOT SHARE IRQ WITH OLD HARDDISK DRIVER (hd.c)\n", hwif->name); return (hwif->present = 0); } #endif /* CONFIG_BLK_DEV_HD */ hwif->present = 0; /* we set it back to 1 if all is ok below */ switch (hwif->major) { case IDE0_MAJOR: rfn = &do_ide0_request; break; #if MAX_HWIFS > 1 case IDE1_MAJOR: rfn = &do_ide1_request; break; #endif #if MAX_HWIFS > 2 case IDE2_MAJOR: rfn = &do_ide2_request; break; #endif #if MAX_HWIFS > 3 case IDE3_MAJOR: rfn = &do_ide3_request; break; #endif #if MAX_HWIFS > 4 case IDE4_MAJOR: rfn = &do_ide4_request; break; #endif #if MAX_HWIFS > 5 case IDE5_MAJOR: rfn = &do_ide5_request; break; #endif default: printk("%s: request_fn NOT DEFINED\n", hwif->name); return (hwif->present = 0); } if (register_blkdev (hwif->major, hwif->name, &ide_fops)) { printk("%s: UNABLE TO GET MAJOR NUMBER %d\n", hwif->name, hwif->major); } else if (init_irq (hwif)) { printk("%s: UNABLE TO GET IRQ %d\n", hwif->name, hwif->irq); (void) unregister_blkdev (hwif->major, hwif->name); } else { init_gendisk(hwif); blk_dev[hwif->major].request_fn = rfn; read_ahead[hwif->major] = 8; /* (4kB) */ hwif->present = 1; /* success */ } return hwif->present; } /* * This is gets invoked once during initialization, to set *everything* up */ int ide_init (void) { int index; init_ide_data (); /* * Probe for special "known" interface chipsets */ probe_for_hwifs (); /* * Probe for drives in the usual way.. CMOS/BIOS, then poke at ports */ for (index = 0; index < MAX_HWIFS; ++index) probe_hwif (&ide_hwifs[index]); for (index = 0; index < MAX_HWIFS; ++index) hwif_init (index); #ifdef CONFIG_BLK_DEV_IDETAPE idetape_register_chrdev(); /* Register character device interface to the ide tape */ #endif /* CONFIG_BLK_DEV_IDETAPE */ return 0; } #ifdef CONFIG_BLK_DEV_IDE_PCMCIA int ide_register(int io_base, int ctl_port, int irq) { int index, i, rc = -1; ide_hwif_t *hwif; ide_drive_t *drive; unsigned long flags; save_flags(flags); cli(); for (index = 0; index < MAX_HWIFS; ++index) { hwif = &ide_hwifs[index]; if (hwif->present) { if (hwif->io_base == io_base || hwif->ctl_port == ctl_port) break; /* this ide port already exists */ } else { hwif->io_base = io_base; hwif->ctl_port = ctl_port; hwif->irq = irq; hwif->noprobe = 0; probe_hwif(hwif); if (!hwif_init(index)) break; for (i = 0; i < hwif->gd->nr_real; i++) { drive = &hwif->drives[i]; revalidate_disk(MKDEV(hwif->major, i<<PARTN_BITS)); #ifdef CONFIG_BLK_DEV_IDECD if (drive->present && drive->media == ide_cdrom) ide_cdrom_setup(drive); #endif /* CONFIG_BLK_DEV_IDECD */ } rc = index; break; } } restore_flags(flags); return rc; } void ide_unregister (unsigned int index) { struct gendisk *gd, **gdp; ide_hwif_t *hwif, *g; ide_hwgroup_t *hwgroup; int irq_count = 0; unsigned long flags; if (index >= MAX_HWIFS) return; save_flags(flags); cli(); hwif = &ide_hwifs[index]; if (!hwif->present || hwif->drives[0].busy || hwif->drives[1].busy) { restore_flags(flags); return; } hwif->present = 0; 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); /* * Note that we only release the standard ports, * and do not even try to handle any extra ports * allocated for weird IDE interface chipsets. */ release_region(hwif->io_base, 8); release_region(hwif->ctl_port, 1); /* * Remove us from the hwgroup, and free * the hwgroup if we were the only member */ while (hwgroup->hwif->next != hwif) hwgroup->hwif = hwgroup->hwif->next; hwgroup->hwif->next = hwif->next; if (hwgroup->hwif == hwif) hwgroup->hwif = hwif->next; if (hwgroup->next_hwif == hwif) hwgroup->next_hwif = hwif->next; if (hwgroup->hwif == hwif) kfree(hwgroup); /* * Remove us from the kernel's knowledge */ unregister_blkdev(hwif->major, hwif->name); kfree(blksize_size[hwif->major]); blk_dev[hwif->major].request_fn = NULL; blksize_size[hwif->major] = NULL; for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) if (*gdp == hwif->gd) break; if (*gdp == NULL) printk("gd not in disk chain!\n"); else { gd = *gdp; *gdp = gd->next; kfree(gd->sizes); kfree(gd->part); kfree(gd); } init_hwif_data (index); /* restore hwif data to pristine status */ restore_flags(flags); } #endif /* CONFIG_BLK_DEV_IDE_PCMCIA */ |