2 * linux/drivers/ide/ide.c Version 6.31 June 9, 2000
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
12 * See linux/MAINTAINERS for address of current maintainer.
14 * This is the multiple IDE interface driver, as evolved from hd.c.
15 * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs (usually 14 & 15).
16 * There can be up to two drives per interface, as per the ATA-2 spec.
18 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
19 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
20 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
21 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
26 * | It traverses the request-list, using interrupts to jump between functions.
27 * | As nearly all functions can be called within interrupts, we may not sleep.
28 * | Special care is recommended. Have Fun!
30 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
32 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
33 * | in the early extended-partition checks and added DM partitions.
35 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
37 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
38 * | and general streamlining by Mark Lord (mlord@pobox.com).
40 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
42 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
43 * Delman Lee (delman@ieee.org) ("Mr. atdisk2")
44 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
46 * This was a rewrite of just about everything from hd.c, though some original
47 * code is still sprinkled about. Think of it as a major evolution, with
48 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
50 * Version 1.0 ALPHA initial code, primary i/f working okay
51 * Version 1.3 BETA dual i/f on shared irq tested & working!
52 * Version 1.4 BETA added auto probing for irq(s)
53 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
55 * Version 5.50 allow values as small as 20 for idebus=
56 * Version 5.51 force non io_32bit in drive_cmd_intr()
57 * change delay_10ms() to delay_50ms() to fix problems
58 * Version 5.52 fix incorrect invalidation of removable devices
59 * add "hdx=slow" command line option
60 * Version 5.60 start to modularize the driver; the disk and ATAPI
61 * drivers can be compiled as loadable modules.
62 * move IDE probe code to ide-probe.c
63 * move IDE disk code to ide-disk.c
64 * add support for generic IDE device subdrivers
65 * add m68k code from Geert Uytterhoeven
66 * probe all interfaces by default
67 * add ioctl to (re)probe an interface
68 * Version 6.00 use per device request queues
69 * attempt to optimize shared hwgroup performance
70 * add ioctl to manually adjust bandwidth algorithms
71 * add kerneld support for the probe module
72 * fix bug in ide_error()
73 * fix bug in the first ide_get_lock() call for Atari
74 * don't flush leftover data for ATAPI devices
75 * Version 6.01 clear hwgroup->active while the hwgroup sleeps
76 * support HDIO_GETGEO for floppies
77 * Version 6.02 fix ide_ack_intr() call
78 * check partition table on floppies
79 * Version 6.03 handle bad status bit sequencing in ide_wait_stat()
80 * Version 6.10 deleted old entries from this list of updates
81 * replaced triton.c with ide-dma.c generic PCI DMA
82 * added support for BIOS-enabled UltraDMA
83 * rename all "promise" things to "pdc4030"
84 * fix EZ-DRIVE handling on small disks
85 * Version 6.11 fix probe error in ide_scan_devices()
86 * fix ancient "jiffies" polling bugs
87 * mask all hwgroup interrupts on each irq entry
88 * Version 6.12 integrate ioctl and proc interfaces
89 * fix parsing of "idex=" command line parameter
90 * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com
91 * Version 6.14 fixed IRQ sharing among PCI devices
92 * Version 6.15 added SMP awareness to IDE drivers
93 * Version 6.16 fixed various bugs; even more SMP friendly
94 * Version 6.17 fix for newest EZ-Drive problem
95 * Version 6.18 default unpartitioned-disk translation now "BIOS LBA"
96 * Version 6.19 Re-design for a UNIFORM driver for all platforms,
97 * model based on suggestions from Russell King and
99 * Promise DC4030VL now supported.
100 * add support for ide6/ide7
101 * delay_50ms() changed to ide_delay_50ms() and exported.
102 * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection.
103 * Added hdx=flash to allow for second flash disk
104 * detection w/o the hang loop.
105 * Added support for ide8/ide9
106 * Added idex=ata66 for the quirky chipsets that are
107 * ATA-66 compliant, but have yet to determine a method
108 * of verification of the 80c cable presence.
109 * Specifically Promise's PDC20262 chipset.
110 * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old
111 * hat that clarified original low level driver design.
112 * Version 6.30 Added SMP support; fixed multmode issues. -ml
113 * Version 6.31 Debug Share INTR's and request queue streaming
114 * Native ATA-100 support
115 * Prep for Cascades Project
117 * Some additional driver compile-time options are in ./include/linux/ide.h
119 * To do, in likely order of completion:
120 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
124 #define REVISION "Revision: 6.31"
125 #define VERSION "Id: ide.c 6.31 2000/06/09"
127 #undef REALLY_SLOW_IO /* most systems can safely undef this */
129 #define _IDE_C /* Tell ide.h it's really us */
131 #include <linux/config.h>
132 #include <linux/module.h>
133 #include <linux/types.h>
134 #include <linux/string.h>
135 #include <linux/kernel.h>
136 #include <linux/timer.h>
137 #include <linux/mm.h>
138 #include <linux/interrupt.h>
139 #include <linux/major.h>
140 #include <linux/errno.h>
141 #include <linux/genhd.h>
142 #include <linux/blkpg.h>
143 #include <linux/malloc.h>
145 #include <linux/init.h>
147 #include <linux/pci.h>
148 #include <linux/delay.h>
149 #include <linux/ide.h>
150 #include <linux/devfs_fs_kernel.h>
152 #include <asm/byteorder.h>
154 #include <asm/uaccess.h>
156 #include <asm/bitops.h>
158 #include "ide_modes.h"
161 #include <linux/kmod.h>
162 #endif /* CONFIG_KMOD */
164 static const byte ide_hwif_to_major
[] = { IDE0_MAJOR
, IDE1_MAJOR
, IDE2_MAJOR
, IDE3_MAJOR
, IDE4_MAJOR
, IDE5_MAJOR
, IDE6_MAJOR
, IDE7_MAJOR
, IDE8_MAJOR
, IDE9_MAJOR
};
166 static int idebus_parameter
; /* holds the "idebus=" parameter */
167 static int system_bus_speed
; /* holds what we think is VESA/PCI bus speed */
168 static int initializing
; /* set while initializing built-in drivers */
170 #ifdef CONFIG_BLK_DEV_IDEPCI
171 static int ide_scan_direction
; /* THIS was formerly 2.2.x pci=reverse */
172 #endif /* CONFIG_BLK_DEV_IDEPCI */
174 #if defined(__mc68000__) || defined(CONFIG_APUS)
176 * ide_lock is used by the Atari code to obtain access to the IDE interrupt,
177 * which is shared between several drivers.
180 #endif /* __mc68000__ || CONFIG_APUS */
183 * ide_modules keeps track of the available IDE chipset/probe/driver modules.
185 ide_module_t
*ide_modules
;
186 ide_module_t
*ide_probe
;
189 * This is declared extern in ide.h, for access by other IDE modules:
191 ide_hwif_t ide_hwifs
[MAX_HWIFS
]; /* master data repository */
193 #if (DISK_RECOVERY_TIME > 0)
195 * For really screwy hardware (hey, at least it *can* be used with Linux)
196 * we can enforce a minimum delay time between successive operations.
198 static unsigned long read_timer (void)
200 unsigned long t
, flags
;
203 __save_flags(flags
); /* local CPU only */
204 __cli(); /* local CPU only */
209 __restore_flags(flags
); /* local CPU only */
212 #endif /* DISK_RECOVERY_TIME */
214 static inline void set_recovery_timer (ide_hwif_t
*hwif
)
216 #if (DISK_RECOVERY_TIME > 0)
217 hwif
->last_time
= read_timer();
218 #endif /* DISK_RECOVERY_TIME */
222 * Do not even *think* about calling this!
224 static void init_hwif_data (unsigned int index
)
228 ide_hwif_t
*hwif
= &ide_hwifs
[index
];
230 /* bulk initialize hwif & drive info with zeros */
231 memset(hwif
, 0, sizeof(ide_hwif_t
));
232 memset(&hw
, 0, sizeof(hw_regs_t
));
234 /* fill in any non-zero initial values */
236 ide_init_hwif_ports(&hw
, ide_default_io_base(index
), 0, &hwif
->irq
);
237 memcpy(&hwif
->hw
, &hw
, sizeof(hw
));
238 memcpy(hwif
->io_ports
, hw
.io_ports
, sizeof(hw
.io_ports
));
239 hwif
->noprobe
= !hwif
->io_ports
[IDE_DATA_OFFSET
];
240 #ifdef CONFIG_BLK_DEV_HD
241 if (hwif
->io_ports
[IDE_DATA_OFFSET
] == HD_DATA
)
242 hwif
->noprobe
= 1; /* may be overridden by ide_setup() */
243 #endif /* CONFIG_BLK_DEV_HD */
244 hwif
->major
= ide_hwif_to_major
[index
];
248 hwif
->name
[3] = '0' + index
;
249 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
250 ide_drive_t
*drive
= &hwif
->drives
[unit
];
252 drive
->media
= ide_disk
;
253 drive
->select
.all
= (unit
<<4)|0xa0;
256 drive
->ready_stat
= READY_STAT
;
257 drive
->bad_wstat
= BAD_W_STAT
;
258 drive
->special
.b
.recalibrate
= 1;
259 drive
->special
.b
.set_geometry
= 1;
260 drive
->name
[0] = 'h';
261 drive
->name
[1] = 'd';
262 drive
->name
[2] = 'a' + (index
* MAX_DRIVES
) + unit
;
263 init_waitqueue_head(&drive
->wqueue
);
268 * init_ide_data() sets reasonable default values into all fields
269 * of all instances of the hwifs and drives, but only on the first call.
270 * Subsequent calls have no effect (they don't wipe out anything).
272 * This routine is normally called at driver initialization time,
273 * but may also be called MUCH earlier during kernel "command-line"
274 * parameter processing. As such, we cannot depend on any other parts
275 * of the kernel (such as memory allocation) to be functioning yet.
277 * This is too bad, as otherwise we could dynamically allocate the
278 * ide_drive_t structs as needed, rather than always consuming memory
279 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
281 #define MAGIC_COOKIE 0x12345678
282 static void __init
init_ide_data (void)
285 static unsigned long magic_cookie
= MAGIC_COOKIE
;
287 if (magic_cookie
!= MAGIC_COOKIE
)
288 return; /* already initialized */
291 /* Initialise all interface structures */
292 for (index
= 0; index
< MAX_HWIFS
; ++index
)
293 init_hwif_data(index
);
295 /* Add default hw interfaces */
296 ide_init_default_hwifs();
298 idebus_parameter
= 0;
299 system_bus_speed
= 0;
303 * CompactFlash cards and their brethern pretend to be removable hard disks, except:
304 * (1) they never have a slave unit, and
305 * (2) they don't have doorlock mechanisms.
306 * This test catches them, and is invoked elsewhere when setting appropriate config bits.
308 * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD) devices,
309 * so in linux 2.3.x we should change this to just treat all PCMCIA drives this way,
310 * and get rid of the model-name tests below (too big of an interface change for 2.2.x).
311 * At that time, we might also consider parameterizing the timeouts and retries,
312 * since these are MUCH faster than mechanical drives. -M.Lord
314 int drive_is_flashcard (ide_drive_t
*drive
)
316 struct hd_driveid
*id
= drive
->id
;
318 if (drive
->removable
&& id
!= NULL
) {
319 if (id
->config
== 0x848a) return 1; /* CompactFlash */
320 if (!strncmp(id
->model
, "KODAK ATA_FLASH", 15) /* Kodak */
321 || !strncmp(id
->model
, "Hitachi CV", 10) /* Hitachi */
322 || !strncmp(id
->model
, "SunDisk SDCFB", 13) /* SunDisk */
323 || !strncmp(id
->model
, "HAGIWARA HPC", 12) /* Hagiwara */
324 || !strncmp(id
->model
, "LEXAR ATA_FLASH", 15) /* Lexar */
325 || !strncmp(id
->model
, "ATA_FLASH", 9)) /* Simple Tech */
327 return 1; /* yes, it is a flash memory card */
330 return 0; /* no, it is not a flash memory card */
334 * ide_system_bus_speed() returns what we think is the system VESA/PCI
335 * bus speed (in MHz). This is used for calculating interface PIO timings.
336 * The default is 40 for known PCI systems, 50 otherwise.
337 * The "idebus=xx" parameter can be used to override this value.
338 * The actual value to be used is computed/displayed the first time through.
340 int ide_system_bus_speed (void)
342 if (!system_bus_speed
) {
343 if (idebus_parameter
)
344 system_bus_speed
= idebus_parameter
; /* user supplied value */
346 else if (pci_present())
347 system_bus_speed
= 33; /* safe default value for PCI */
348 #endif /* CONFIG_PCI */
350 system_bus_speed
= 50; /* safe default value for VESA and PCI */
351 printk("ide: Assuming %dMHz system bus speed for PIO modes%s\n", system_bus_speed
,
352 idebus_parameter
? "" : "; override with idebus=xx");
354 return system_bus_speed
;
359 * Some localbus EIDE interfaces require a special access sequence
360 * when using 32-bit I/O instructions to transfer data. We call this
361 * the "vlb_sync" sequence, which consists of three successive reads
362 * of the sector count register location, with interrupts disabled
363 * to ensure that the reads all happen together.
365 static inline void do_vlb_sync (ide_ioreg_t port
) {
370 #endif /* SUPPORT_VLB_SYNC */
373 * This is used for most PIO data transfers *from* the IDE interface
375 void ide_input_data (ide_drive_t
*drive
, void *buffer
, unsigned int wcount
)
377 byte io_32bit
= drive
->io_32bit
;
383 __save_flags(flags
); /* local CPU only */
384 __cli(); /* local CPU only */
385 do_vlb_sync(IDE_NSECTOR_REG
);
386 insl(IDE_DATA_REG
, buffer
, wcount
);
387 __restore_flags(flags
); /* local CPU only */
389 #endif /* SUPPORT_VLB_SYNC */
390 insl(IDE_DATA_REG
, buffer
, wcount
);
392 #if SUPPORT_SLOW_DATA_PORTS
394 unsigned short *ptr
= (unsigned short *) buffer
;
396 *ptr
++ = inw_p(IDE_DATA_REG
);
397 *ptr
++ = inw_p(IDE_DATA_REG
);
400 #endif /* SUPPORT_SLOW_DATA_PORTS */
401 insw(IDE_DATA_REG
, buffer
, wcount
<<1);
406 * This is used for most PIO data transfers *to* the IDE interface
408 void ide_output_data (ide_drive_t
*drive
, void *buffer
, unsigned int wcount
)
410 byte io_32bit
= drive
->io_32bit
;
416 __save_flags(flags
); /* local CPU only */
417 __cli(); /* local CPU only */
418 do_vlb_sync(IDE_NSECTOR_REG
);
419 outsl(IDE_DATA_REG
, buffer
, wcount
);
420 __restore_flags(flags
); /* local CPU only */
422 #endif /* SUPPORT_VLB_SYNC */
423 outsl(IDE_DATA_REG
, buffer
, wcount
);
425 #if SUPPORT_SLOW_DATA_PORTS
427 unsigned short *ptr
= (unsigned short *) buffer
;
429 outw_p(*ptr
++, IDE_DATA_REG
);
430 outw_p(*ptr
++, IDE_DATA_REG
);
433 #endif /* SUPPORT_SLOW_DATA_PORTS */
434 outsw(IDE_DATA_REG
, buffer
, wcount
<<1);
439 * The following routines are mainly used by the ATAPI drivers.
441 * These routines will round up any request for an odd number of bytes,
442 * so if an odd bytecount is specified, be sure that there's at least one
443 * extra byte allocated for the buffer.
445 void atapi_input_bytes (ide_drive_t
*drive
, void *buffer
, unsigned int bytecount
)
448 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
449 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
450 /* Atari has a byte-swapped IDE interface */
451 insw_swapw(IDE_DATA_REG
, buffer
, bytecount
/ 2);
454 #endif /* CONFIG_ATARI */
455 ide_input_data (drive
, buffer
, bytecount
/ 4);
456 if ((bytecount
& 0x03) >= 2)
457 insw (IDE_DATA_REG
, ((byte
*)buffer
) + (bytecount
& ~0x03), 1);
460 void atapi_output_bytes (ide_drive_t
*drive
, void *buffer
, unsigned int bytecount
)
463 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
464 if (MACH_IS_ATARI
|| MACH_IS_Q40
) {
465 /* Atari has a byte-swapped IDE interface */
466 outsw_swapw(IDE_DATA_REG
, buffer
, bytecount
/ 2);
469 #endif /* CONFIG_ATARI */
470 ide_output_data (drive
, buffer
, bytecount
/ 4);
471 if ((bytecount
& 0x03) >= 2)
472 outsw (IDE_DATA_REG
, ((byte
*)buffer
) + (bytecount
& ~0x03), 1);
476 * Needed for PCI irq sharing
478 static inline int drive_is_ready (ide_drive_t
*drive
)
481 if (drive
->waiting_for_dma
)
482 return HWIF(drive
)->dmaproc(ide_dma_test_irq
, drive
);
484 udelay(1); /* need to guarantee 400ns since last command was issued */
487 #ifdef CONFIG_IDEPCI_SHARE_IRQ
489 * We do a passive status test under shared PCI interrupts on
490 * cards that truly share the ATA side interrupt, but may also share
491 * an interrupt with another pci card/device. We make no assumptions
492 * about possible isa-pnp and pci-pnp issues yet.
495 stat
= GET_ALTSTAT();
497 #endif /* CONFIG_IDEPCI_SHARE_IRQ */
498 stat
= GET_STAT(); /* Note: this may clear a pending IRQ!! */
500 if (stat
& BUSY_STAT
)
501 return 0; /* drive busy: definitely not interrupting */
502 return 1; /* drive ready: *might* be interrupting */
506 * This is our end_request replacement function.
508 void ide_end_request (byte uptodate
, ide_hwgroup_t
*hwgroup
)
513 spin_lock_irqsave(&io_request_lock
, flags
);
516 if (!end_that_request_first(rq
, uptodate
, hwgroup
->drive
->name
)) {
517 add_blkdev_randomness(MAJOR(rq
->rq_dev
));
518 blkdev_dequeue_request(rq
);
520 end_that_request_last(rq
);
522 spin_unlock_irqrestore(&io_request_lock
, flags
);
526 * This should get invoked any time we exit the driver to
527 * wait for an interrupt response from a drive. handler() points
528 * at the appropriate code to handle the next interrupt, and a
529 * timer is started to prevent us from waiting forever in case
530 * something goes wrong (see the ide_timer_expiry() handler later on).
532 void ide_set_handler (ide_drive_t
*drive
, ide_handler_t
*handler
,
533 unsigned int timeout
, ide_expiry_t
*expiry
)
536 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
538 spin_lock_irqsave(&io_request_lock
, flags
);
539 if (hwgroup
->handler
!= NULL
) {
540 printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n",
541 drive
->name
, hwgroup
->handler
, handler
);
543 hwgroup
->handler
= handler
;
544 hwgroup
->expiry
= expiry
;
545 hwgroup
->timer
.expires
= jiffies
+ timeout
;
546 add_timer(&hwgroup
->timer
);
547 spin_unlock_irqrestore(&io_request_lock
, flags
);
551 * current_capacity() returns the capacity (in sectors) of a drive
552 * according to its current geometry/LBA settings.
554 unsigned long current_capacity (ide_drive_t
*drive
)
558 if (drive
->driver
!= NULL
)
559 return DRIVER(drive
)->capacity(drive
);
563 extern struct block_device_operations ide_fops
[];
565 * ide_geninit() is called exactly *once* for each interface.
567 void ide_geninit (ide_hwif_t
*hwif
)
570 struct gendisk
*gd
= hwif
->gd
;
572 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
573 ide_drive_t
*drive
= &hwif
->drives
[unit
];
577 if (drive
->media
!=ide_disk
&& drive
->media
!=ide_floppy
)
579 register_disk(gd
,MKDEV(hwif
->major
,unit
<<PARTN_BITS
),
580 #ifdef CONFIG_BLK_DEV_ISAPNP
581 (drive
->forced_geom
&& drive
->noprobe
) ? 1 :
582 #endif /* CONFIG_BLK_DEV_ISAPNP */
583 1<<PARTN_BITS
, ide_fops
,
584 current_capacity(drive
));
588 static ide_startstop_t
do_reset1 (ide_drive_t
*, int); /* needed below */
591 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
592 * during an atapi drive reset operation. If the drive has not yet responded,
593 * and we have not yet hit our maximum waiting time, then the timer is restarted
596 static ide_startstop_t
atapi_reset_pollfunc (ide_drive_t
*drive
)
598 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
601 SELECT_DRIVE(HWIF(drive
),drive
);
604 if (OK_STAT(stat
=GET_STAT(), 0, BUSY_STAT
)) {
605 printk("%s: ATAPI reset complete\n", drive
->name
);
607 if (0 < (signed long)(hwgroup
->poll_timeout
- jiffies
)) {
608 ide_set_handler (drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
609 return ide_started
; /* continue polling */
611 hwgroup
->poll_timeout
= 0; /* end of polling */
612 printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive
->name
, stat
);
613 return do_reset1 (drive
, 1); /* do it the old fashioned way */
615 hwgroup
->poll_timeout
= 0; /* done polling */
620 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
621 * during an ide reset operation. If the drives have not yet responded,
622 * and we have not yet hit our maximum waiting time, then the timer is restarted
625 static ide_startstop_t
reset_pollfunc (ide_drive_t
*drive
)
627 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
628 ide_hwif_t
*hwif
= HWIF(drive
);
631 if (!OK_STAT(tmp
=GET_STAT(), 0, BUSY_STAT
)) {
632 if (0 < (signed long)(hwgroup
->poll_timeout
- jiffies
)) {
633 ide_set_handler (drive
, &reset_pollfunc
, HZ
/20, NULL
);
634 return ide_started
; /* continue polling */
636 printk("%s: reset timed-out, status=0x%02x\n", hwif
->name
, tmp
);
638 printk("%s: reset: ", hwif
->name
);
639 if ((tmp
= GET_ERR()) == 1)
642 #if FANCY_STATUS_DUMPS
644 switch (tmp
& 0x7f) {
645 case 1: printk("passed");
647 case 2: printk("formatter device error");
649 case 3: printk("sector buffer error");
651 case 4: printk("ECC circuitry error");
653 case 5: printk("controlling MPU error");
655 default:printk("error (0x%02x?)", tmp
);
658 printk("; slave: failed");
662 #endif /* FANCY_STATUS_DUMPS */
665 hwgroup
->poll_timeout
= 0; /* done polling */
669 static void check_dma_crc (ide_drive_t
*drive
)
671 if (drive
->crc_count
) {
672 (void) HWIF(drive
)->dmaproc(ide_dma_off_quietly
, drive
);
673 if ((HWIF(drive
)->speedproc
) != NULL
)
674 HWIF(drive
)->speedproc(drive
, ide_auto_reduce_xfer(drive
));
675 if (drive
->current_speed
>= XFER_SW_DMA_0
)
676 (void) HWIF(drive
)->dmaproc(ide_dma_on
, drive
);
678 (void) HWIF(drive
)->dmaproc(ide_dma_off
, drive
);
682 static void pre_reset (ide_drive_t
*drive
)
684 if (drive
->driver
!= NULL
)
685 DRIVER(drive
)->pre_reset(drive
);
687 if (!drive
->keep_settings
) {
688 if (drive
->using_dma
) {
689 check_dma_crc(drive
);
696 if (drive
->using_dma
)
697 check_dma_crc(drive
);
701 * do_reset1() attempts to recover a confused drive by resetting it.
702 * Unfortunately, resetting a disk drive actually resets all devices on
703 * the same interface, so it can really be thought of as resetting the
704 * interface rather than resetting the drive.
706 * ATAPI devices have their own reset mechanism which allows them to be
707 * individually reset without clobbering other devices on the same interface.
709 * Unfortunately, the IDE interface does not generate an interrupt to let
710 * us know when the reset operation has finished, so we must poll for this.
711 * Equally poor, though, is the fact that this may a very long time to complete,
712 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
713 * we set a timer to poll at 50ms intervals.
715 static ide_startstop_t
do_reset1 (ide_drive_t
*drive
, int do_not_try_atapi
)
719 ide_hwif_t
*hwif
= HWIF(drive
);
720 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
722 __save_flags(flags
); /* local CPU only */
723 __cli(); /* local CPU only */
725 /* For an ATAPI device, first try an ATAPI SRST. */
726 if (drive
->media
!= ide_disk
&& !do_not_try_atapi
) {
728 SELECT_DRIVE(hwif
,drive
);
730 OUT_BYTE (WIN_SRST
, IDE_COMMAND_REG
);
731 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
732 ide_set_handler (drive
, &atapi_reset_pollfunc
, HZ
/20, NULL
);
733 __restore_flags (flags
); /* local CPU only */
738 * First, reset any device state data we were maintaining
739 * for any of the drives on this interface.
741 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
)
742 pre_reset(&hwif
->drives
[unit
]);
744 #if OK_TO_RESET_CONTROLLER
745 if (!IDE_CONTROL_REG
) {
746 __restore_flags(flags
);
750 * Note that we also set nIEN while resetting the device,
751 * to mask unwanted interrupts from the interface during the reset.
752 * However, due to the design of PC hardware, this will cause an
753 * immediate interrupt due to the edge transition it produces.
754 * This single interrupt gives us a "fast poll" for drives that
755 * recover from reset very quickly, saving us the first 50ms wait time.
757 OUT_BYTE(drive
->ctl
|6,IDE_CONTROL_REG
); /* set SRST and nIEN */
758 udelay(10); /* more than enough time */
759 OUT_BYTE(drive
->ctl
|2,IDE_CONTROL_REG
); /* clear SRST, leave nIEN */
760 udelay(10); /* more than enough time */
761 hwgroup
->poll_timeout
= jiffies
+ WAIT_WORSTCASE
;
762 ide_set_handler (drive
, &reset_pollfunc
, HZ
/20, NULL
);
765 * Some weird controller like resetting themselves to a strange
766 * state when the disks are reset this way. At least, the Winbond
767 * 553 documentation says that
769 if (hwif
->resetproc
!= NULL
)
770 hwif
->resetproc(drive
);
772 #endif /* OK_TO_RESET_CONTROLLER */
774 __restore_flags (flags
); /* local CPU only */
779 * ide_do_reset() is the entry point to the drive/interface reset code.
781 ide_startstop_t
ide_do_reset (ide_drive_t
*drive
)
783 return do_reset1 (drive
, 0);
787 * Clean up after success/failure of an explicit drive cmd
789 void ide_end_drive_cmd (ide_drive_t
*drive
, byte stat
, byte err
)
792 struct request
*rq
= HWGROUP(drive
)->rq
;
794 if (rq
->cmd
== IDE_DRIVE_CMD
) {
795 byte
*args
= (byte
*) rq
->buffer
;
796 rq
->errors
= !OK_STAT(stat
,READY_STAT
,BAD_STAT
);
800 args
[2] = IN_BYTE(IDE_NSECTOR_REG
);
802 } else if (rq
->cmd
== IDE_DRIVE_TASK
) {
803 byte
*args
= (byte
*) rq
->buffer
;
804 rq
->errors
= !OK_STAT(stat
,READY_STAT
,BAD_STAT
);
808 args
[2] = IN_BYTE(IDE_NSECTOR_REG
);
809 args
[3] = IN_BYTE(IDE_SECTOR_REG
);
810 args
[4] = IN_BYTE(IDE_LCYL_REG
);
811 args
[5] = IN_BYTE(IDE_HCYL_REG
);
812 args
[6] = IN_BYTE(IDE_SELECT_REG
);
815 spin_lock_irqsave(&io_request_lock
, flags
);
816 blkdev_dequeue_request(rq
);
817 HWGROUP(drive
)->rq
= NULL
;
818 blkdev_release_request(rq
);
819 spin_unlock_irqrestore(&io_request_lock
, flags
);
821 up(rq
->sem
); /* inform originator that rq has been serviced */
825 * Error reporting, in human readable form (luxurious, but a memory hog).
827 byte
ide_dump_status (ide_drive_t
*drive
, const char *msg
, byte stat
)
832 __save_flags (flags
); /* local CPU only */
833 ide__sti(); /* local CPU only */
834 printk("%s: %s: status=0x%02x", drive
->name
, msg
, stat
);
835 #if FANCY_STATUS_DUMPS
837 if (stat
& BUSY_STAT
)
840 if (stat
& READY_STAT
) printk("DriveReady ");
841 if (stat
& WRERR_STAT
) printk("DeviceFault ");
842 if (stat
& SEEK_STAT
) printk("SeekComplete ");
843 if (stat
& DRQ_STAT
) printk("DataRequest ");
844 if (stat
& ECC_STAT
) printk("CorrectedError ");
845 if (stat
& INDEX_STAT
) printk("Index ");
846 if (stat
& ERR_STAT
) printk("Error ");
849 #endif /* FANCY_STATUS_DUMPS */
851 if ((stat
& (BUSY_STAT
|ERR_STAT
)) == ERR_STAT
) {
853 printk("%s: %s: error=0x%02x", drive
->name
, msg
, err
);
854 #if FANCY_STATUS_DUMPS
855 if (drive
->media
== ide_disk
) {
857 if (err
& ABRT_ERR
) printk("DriveStatusError ");
858 if (err
& ICRC_ERR
) printk("%s", (err
& ABRT_ERR
) ? "BadCRC " : "BadSector ");
859 if (err
& ECC_ERR
) printk("UncorrectableError ");
860 if (err
& ID_ERR
) printk("SectorIdNotFound ");
861 if (err
& TRK0_ERR
) printk("TrackZeroNotFound ");
862 if (err
& MARK_ERR
) printk("AddrMarkNotFound ");
864 if ((err
& (BBD_ERR
| ABRT_ERR
)) == BBD_ERR
|| (err
& (ECC_ERR
|ID_ERR
|MARK_ERR
))) {
865 byte cur
= IN_BYTE(IDE_SELECT_REG
);
866 if (cur
& 0x40) { /* using LBA? */
867 printk(", LBAsect=%ld", (unsigned long)
869 |(IN_BYTE(IDE_HCYL_REG
)<<16)
870 |(IN_BYTE(IDE_LCYL_REG
)<<8)
871 | IN_BYTE(IDE_SECTOR_REG
));
873 printk(", CHS=%d/%d/%d",
874 (IN_BYTE(IDE_HCYL_REG
)<<8) +
875 IN_BYTE(IDE_LCYL_REG
),
877 IN_BYTE(IDE_SECTOR_REG
));
879 if (HWGROUP(drive
)->rq
)
880 printk(", sector=%ld", HWGROUP(drive
)->rq
->sector
);
883 #endif /* FANCY_STATUS_DUMPS */
886 __restore_flags (flags
); /* local CPU only */
891 * try_to_flush_leftover_data() is invoked in response to a drive
892 * unexpectedly having its DRQ_STAT bit set. As an alternative to
893 * resetting the drive, this routine tries to clear the condition
894 * by read a sector's worth of data from the drive. Of course,
895 * this may not help if the drive is *waiting* for data from *us*.
897 static void try_to_flush_leftover_data (ide_drive_t
*drive
)
899 int i
= (drive
->mult_count
? drive
->mult_count
: 1) * SECTOR_WORDS
;
901 if (drive
->media
!= ide_disk
)
905 unsigned int wcount
= (i
> 16) ? 16 : i
;
907 ide_input_data (drive
, buffer
, wcount
);
912 * ide_error() takes action based on the error returned by the drive.
914 ide_startstop_t
ide_error (ide_drive_t
*drive
, const char *msg
, byte stat
)
919 err
= ide_dump_status(drive
, msg
, stat
);
920 if (drive
== NULL
|| (rq
= HWGROUP(drive
)->rq
) == NULL
)
922 /* retry only "normal" I/O: */
923 if (rq
->cmd
== IDE_DRIVE_CMD
|| rq
->cmd
== IDE_DRIVE_TASK
) {
925 ide_end_drive_cmd(drive
, stat
, err
);
928 if (stat
& BUSY_STAT
|| ((stat
& WRERR_STAT
) && !drive
->nowerr
)) { /* other bits are useless when BUSY */
929 rq
->errors
|= ERROR_RESET
;
931 if (drive
->media
== ide_disk
&& (stat
& ERR_STAT
)) {
932 /* err has different meaning on cdrom and tape */
933 if (err
== ABRT_ERR
) {
934 if (drive
->select
.b
.lba
&& IN_BYTE(IDE_COMMAND_REG
) == WIN_SPECIFY
)
935 return ide_stopped
; /* some newer drives don't support WIN_SPECIFY */
936 } else if ((err
& (ABRT_ERR
| ICRC_ERR
)) == (ABRT_ERR
| ICRC_ERR
)) {
937 drive
->crc_count
++; /* UDMA crc error -- just retry the operation */
938 } else if (err
& (BBD_ERR
| ECC_ERR
)) /* retries won't help these */
939 rq
->errors
= ERROR_MAX
;
940 else if (err
& TRK0_ERR
) /* help it find track zero */
941 rq
->errors
|= ERROR_RECAL
;
943 if ((stat
& DRQ_STAT
) && rq
->cmd
!= WRITE
)
944 try_to_flush_leftover_data(drive
);
946 if (GET_STAT() & (BUSY_STAT
|DRQ_STAT
))
947 OUT_BYTE(WIN_IDLEIMMEDIATE
,IDE_COMMAND_REG
); /* force an abort */
949 if (rq
->errors
>= ERROR_MAX
) {
950 if (drive
->driver
!= NULL
)
951 DRIVER(drive
)->end_request(0, HWGROUP(drive
));
953 ide_end_request(0, HWGROUP(drive
));
955 if ((rq
->errors
& ERROR_RESET
) == ERROR_RESET
) {
957 return ide_do_reset(drive
);
959 if ((rq
->errors
& ERROR_RECAL
) == ERROR_RECAL
)
960 drive
->special
.b
.recalibrate
= 1;
967 * Issue a simple drive command
968 * The drive must be selected beforehand.
970 void ide_cmd (ide_drive_t
*drive
, byte cmd
, byte nsect
, ide_handler_t
*handler
)
972 ide_set_handler (drive
, handler
, WAIT_CMD
, NULL
);
974 OUT_BYTE(drive
->ctl
,IDE_CONTROL_REG
); /* clear nIEN */
975 SELECT_MASK(HWIF(drive
),drive
,0);
976 OUT_BYTE(nsect
,IDE_NSECTOR_REG
);
977 OUT_BYTE(cmd
,IDE_COMMAND_REG
);
981 * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD.
983 static ide_startstop_t
drive_cmd_intr (ide_drive_t
*drive
)
985 struct request
*rq
= HWGROUP(drive
)->rq
;
986 byte
*args
= (byte
*) rq
->buffer
;
987 byte stat
= GET_STAT();
990 ide__sti(); /* local CPU only */
991 if ((stat
& DRQ_STAT
) && args
&& args
[3]) {
992 byte io_32bit
= drive
->io_32bit
;
994 ide_input_data(drive
, &args
[4], args
[3] * SECTOR_WORDS
);
995 drive
->io_32bit
= io_32bit
;
996 while (((stat
= GET_STAT()) & BUSY_STAT
) && retries
--)
1000 if (!OK_STAT(stat
, READY_STAT
, BAD_STAT
))
1001 return ide_error(drive
, "drive_cmd", stat
); /* calls ide_end_drive_cmd */
1002 ide_end_drive_cmd (drive
, stat
, GET_ERR());
1007 * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT
1008 * commands to a drive. It used to do much more, but has been scaled back.
1010 static ide_startstop_t
do_special (ide_drive_t
*drive
)
1012 special_t
*s
= &drive
->special
;
1015 printk("%s: do_special: 0x%02x\n", drive
->name
, s
->all
);
1017 if (s
->b
.set_tune
) {
1018 ide_tuneproc_t
*tuneproc
= HWIF(drive
)->tuneproc
;
1020 if (tuneproc
!= NULL
)
1021 tuneproc(drive
, drive
->tune_req
);
1022 } else if (drive
->driver
!= NULL
) {
1023 return DRIVER(drive
)->special(drive
);
1024 } else if (s
->all
) {
1025 printk("%s: bad special flag: 0x%02x\n", drive
->name
, s
->all
);
1032 * This routine busy-waits for the drive status to be not "busy".
1033 * It then checks the status for all of the "good" bits and none
1034 * of the "bad" bits, and if all is okay it returns 0. All other
1035 * cases return 1 after invoking ide_error() -- caller should just return.
1037 * This routine should get fixed to not hog the cpu during extra long waits..
1038 * That could be done by busy-waiting for the first jiffy or two, and then
1039 * setting a timer to wake up at half second intervals thereafter,
1040 * until timeout is achieved, before timing out.
1042 int ide_wait_stat (ide_startstop_t
*startstop
, ide_drive_t
*drive
, byte good
, byte bad
, unsigned long timeout
) {
1045 unsigned long flags
;
1047 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
1048 if ((stat
= GET_STAT()) & BUSY_STAT
) {
1049 __save_flags(flags
); /* local CPU only */
1050 ide__sti(); /* local CPU only */
1052 while ((stat
= GET_STAT()) & BUSY_STAT
) {
1053 if (0 < (signed long)(jiffies
- timeout
)) {
1054 __restore_flags(flags
); /* local CPU only */
1055 *startstop
= ide_error(drive
, "status timeout", stat
);
1059 __restore_flags(flags
); /* local CPU only */
1062 * Allow status to settle, then read it again.
1063 * A few rare drives vastly violate the 400ns spec here,
1064 * so we'll wait up to 10usec for a "good" status
1065 * rather than expensively fail things immediately.
1066 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
1068 for (i
= 0; i
< 10; i
++) {
1070 if (OK_STAT((stat
= GET_STAT()), good
, bad
))
1073 *startstop
= ide_error(drive
, "status error", stat
);
1078 * execute_drive_cmd() issues a special drive command,
1079 * usually initiated by ioctl() from the external hdparm program.
1081 static ide_startstop_t
execute_drive_cmd (ide_drive_t
*drive
, struct request
*rq
)
1083 byte
*args
= rq
->buffer
;
1084 if (args
&& rq
->cmd
== IDE_DRIVE_TASK
) {
1087 printk("%s: DRIVE_TASK_CMD data=x%02x cmd=0x%02x fr=0x%02x ns=0x%02x sc=0x%02x lcyl=0x%02x hcyl=0x%02x sel=0x%02x\n",
1088 drive
->name
, args
[0], args
[1], args
[2], args
[3], args
[4], args
[5], args
[6]);
1090 OUT_BYTE(args
[1], IDE_FEATURE_REG
);
1091 OUT_BYTE(args
[3], IDE_SECTOR_REG
);
1092 OUT_BYTE(args
[4], IDE_LCYL_REG
);
1093 OUT_BYTE(args
[5], IDE_HCYL_REG
);
1094 sel
= (args
[6] & ~0x10);
1095 if (drive
->select
.b
.unit
)
1097 OUT_BYTE(sel
, IDE_SELECT_REG
);
1098 ide_cmd(drive
, args
[0], args
[2], &drive_cmd_intr
);
1102 printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x xx=0x%02x\n",
1103 drive
->name
, args
[0], args
[1], args
[2], args
[3]);
1105 if (args
[0] == WIN_SMART
) {
1106 OUT_BYTE(0x4f, IDE_LCYL_REG
);
1107 OUT_BYTE(0xc2, IDE_HCYL_REG
);
1108 OUT_BYTE(args
[2],IDE_FEATURE_REG
);
1109 OUT_BYTE(args
[1],IDE_SECTOR_REG
);
1110 ide_cmd(drive
, args
[0], args
[3], &drive_cmd_intr
);
1113 OUT_BYTE(args
[2],IDE_FEATURE_REG
);
1114 ide_cmd(drive
, args
[0], args
[1], &drive_cmd_intr
);
1118 * NULL is actually a valid way of waiting for
1119 * all current requests to be flushed from the queue.
1122 printk("%s: DRIVE_CMD (null)\n", drive
->name
);
1124 ide_end_drive_cmd(drive
, GET_STAT(), GET_ERR());
1130 * start_request() initiates handling of a new I/O request
1132 static ide_startstop_t
start_request (ide_drive_t
*drive
)
1134 ide_startstop_t startstop
;
1135 unsigned long block
, blockend
;
1136 struct request
*rq
= blkdev_entry_next_request(&drive
->queue
.queue_head
);
1137 unsigned int minor
= MINOR(rq
->rq_dev
), unit
= minor
>> PARTN_BITS
;
1138 ide_hwif_t
*hwif
= HWIF(drive
);
1141 printk("%s: start_request: current=0x%08lx\n", hwif
->name
, (unsigned long) rq
);
1143 if (unit
>= MAX_DRIVES
) {
1144 printk("%s: bad device number: %s\n", hwif
->name
, kdevname(rq
->rq_dev
));
1148 if (rq
->bh
&& !buffer_locked(rq
->bh
)) {
1149 printk("%s: block not locked\n", drive
->name
);
1154 blockend
= block
+ rq
->nr_sectors
;
1156 if ((rq
->cmd
== READ
|| rq
->cmd
== WRITE
) &&
1157 (drive
->media
== ide_disk
|| drive
->media
== ide_floppy
)) {
1158 if ((blockend
< block
) || (blockend
> drive
->part
[minor
&PARTN_MASK
].nr_sects
)) {
1159 printk("%s%c: bad access: block=%ld, count=%ld\n", drive
->name
,
1160 (minor
&PARTN_MASK
)?'0'+(minor
&PARTN_MASK
):' ', block
, rq
->nr_sectors
);
1163 block
+= drive
->part
[minor
&PARTN_MASK
].start_sect
+ drive
->sect0
;
1165 /* Yecch - this will shift the entire interval,
1166 possibly killing some innocent following sector */
1167 if (block
== 0 && drive
->remap_0_to_1
== 1)
1168 block
= 1; /* redirect MBR access to EZ-Drive partn table */
1170 #if (DISK_RECOVERY_TIME > 0)
1171 while ((read_timer() - hwif
->last_time
) < DISK_RECOVERY_TIME
);
1174 SELECT_DRIVE(hwif
, drive
);
1175 if (ide_wait_stat(&startstop
, drive
, drive
->ready_stat
, BUSY_STAT
|DRQ_STAT
, WAIT_READY
)) {
1176 printk("%s: drive not ready for command\n", drive
->name
);
1179 if (!drive
->special
.all
) {
1180 if (rq
->cmd
== IDE_DRIVE_CMD
|| rq
->cmd
== IDE_DRIVE_TASK
) {
1181 return execute_drive_cmd(drive
, rq
);
1183 if (drive
->driver
!= NULL
) {
1184 return (DRIVER(drive
)->do_request(drive
, rq
, block
));
1186 printk("%s: media type %d not supported\n", drive
->name
, drive
->media
);
1189 return do_special(drive
);
1191 if (drive
->driver
!= NULL
)
1192 DRIVER(drive
)->end_request(0, HWGROUP(drive
));
1194 ide_end_request(0, HWGROUP(drive
));
1199 * ide_stall_queue() can be used by a drive to give excess bandwidth back
1200 * to the hwgroup by sleeping for timeout jiffies.
1202 void ide_stall_queue (ide_drive_t
*drive
, unsigned long timeout
)
1204 if (timeout
> WAIT_WORSTCASE
)
1205 timeout
= WAIT_WORSTCASE
;
1206 drive
->sleep
= timeout
+ jiffies
;
1209 #define WAKEUP(drive) ((drive)->service_start + 2 * (drive)->service_time)
1212 * choose_drive() selects the next drive which will be serviced.
1214 static inline ide_drive_t
*choose_drive (ide_hwgroup_t
*hwgroup
)
1216 ide_drive_t
*drive
, *best
;
1220 drive
= hwgroup
->drive
;
1222 if (!list_empty(&drive
->queue
.queue_head
) && (!drive
->sleep
|| 0 <= (signed long)(jiffies
- drive
->sleep
))) {
1224 || (drive
->sleep
&& (!best
->sleep
|| 0 < (signed long)(best
->sleep
- drive
->sleep
)))
1225 || (!best
->sleep
&& 0 < (signed long)(WAKEUP(best
) - WAKEUP(drive
))))
1227 if( !drive
->queue
.plugged
)
1231 } while ((drive
= drive
->next
) != hwgroup
->drive
);
1232 if (best
&& best
->nice1
&& !best
->sleep
&& best
!= hwgroup
->drive
&& best
->service_time
> WAIT_MIN_SLEEP
) {
1233 long t
= (signed long)(WAKEUP(best
) - jiffies
);
1234 if (t
>= WAIT_MIN_SLEEP
) {
1236 * We *may* have some time to spare, but first let's see if
1237 * someone can potentially benefit from our nice mood today..
1242 && 0 < (signed long)(WAKEUP(drive
) - (jiffies
- best
->service_time
))
1243 && 0 < (signed long)((jiffies
+ t
) - WAKEUP(drive
)))
1245 ide_stall_queue(best
, IDE_MIN(t
, 10 * WAIT_MIN_SLEEP
));
1248 } while ((drive
= drive
->next
) != best
);
1255 * Issue a new request to a drive from hwgroup
1256 * Caller must have already done spin_lock_irqsave(&io_request_lock, ..);
1258 * A hwgroup is a serialized group of IDE interfaces. Usually there is
1259 * exactly one hwif (interface) per hwgroup, but buggy controllers (eg. CMD640)
1260 * may have both interfaces in a single hwgroup to "serialize" access.
1261 * Or possibly multiple ISA interfaces can share a common IRQ by being grouped
1262 * together into one hwgroup for serialized access.
1264 * Note also that several hwgroups can end up sharing a single IRQ,
1265 * possibly along with many other devices. This is especially common in
1266 * PCI-based systems with off-board IDE controller cards.
1268 * The IDE driver uses the single global io_request_lock spinlock to protect
1269 * access to the request queues, and to protect the hwgroup->busy flag.
1271 * The first thread into the driver for a particular hwgroup sets the
1272 * hwgroup->busy flag to indicate that this hwgroup is now active,
1273 * and then initiates processing of the top request from the request queue.
1275 * Other threads attempting entry notice the busy setting, and will simply
1276 * queue their new requests and exit immediately. Note that hwgroup->busy
1277 * remains set even when the driver is merely awaiting the next interrupt.
1278 * Thus, the meaning is "this hwgroup is busy processing a request".
1280 * When processing of a request completes, the completing thread or IRQ-handler
1281 * will start the next request from the queue. If no more work remains,
1282 * the driver will clear the hwgroup->busy flag and exit.
1284 * The io_request_lock (spinlock) is used to protect all access to the
1285 * hwgroup->busy flag, but is otherwise not needed for most processing in
1286 * the driver. This makes the driver much more friendlier to shared IRQs
1287 * than previous designs, while remaining 100% (?) SMP safe and capable.
1289 static void ide_do_request(ide_hwgroup_t
*hwgroup
, int masked_irq
)
1293 ide_startstop_t startstop
;
1295 ide_get_lock(&ide_lock
, ide_intr
, hwgroup
); /* for atari only: POSSIBLY BROKEN HERE(?) */
1297 __cli(); /* necessary paranoia: ensure IRQs are masked on local CPU */
1299 while (!hwgroup
->busy
) {
1301 drive
= choose_drive(hwgroup
);
1302 if (drive
== NULL
) {
1303 unsigned long sleep
= 0;
1305 drive
= hwgroup
->drive
;
1307 if (drive
->sleep
&& (!sleep
|| 0 < (signed long)(sleep
- drive
->sleep
)))
1308 sleep
= drive
->sleep
;
1309 } while ((drive
= drive
->next
) != hwgroup
->drive
);
1312 * Take a short snooze, and then wake up this hwgroup again.
1313 * This gives other hwgroups on the same a chance to
1314 * play fairly with us, just in case there are big differences
1315 * in relative throughputs.. don't want to hog the cpu too much.
1317 if (0 < (signed long)(jiffies
+ WAIT_MIN_SLEEP
- sleep
))
1318 sleep
= jiffies
+ WAIT_MIN_SLEEP
;
1320 if (timer_pending(&hwgroup
->timer
))
1321 printk("ide_set_handler: timer already active\n");
1323 hwgroup
->sleeping
= 1; /* so that ide_timer_expiry knows what to do */
1324 mod_timer(&hwgroup
->timer
, sleep
);
1325 /* we purposely leave hwgroup->busy==1 while sleeping */
1327 /* Ugly, but how can we sleep for the lock otherwise? perhaps from tq_disk? */
1328 ide_release_lock(&ide_lock
); /* for atari only */
1331 return; /* no more work for this hwgroup (for now) */
1334 if (hwgroup
->hwif
->sharing_irq
&& hwif
!= hwgroup
->hwif
&& hwif
->io_ports
[IDE_CONTROL_OFFSET
]) {
1335 /* set nIEN for previous hwif */
1336 SELECT_INTERRUPT(hwif
, drive
);
1338 hwgroup
->hwif
= hwif
;
1339 hwgroup
->drive
= drive
;
1341 drive
->service_start
= jiffies
;
1343 if ( drive
->queue
.plugged
) /* paranoia */
1344 printk("%s: Huh? nuking plugged queue\n", drive
->name
);
1345 hwgroup
->rq
= blkdev_entry_next_request(&drive
->queue
.queue_head
);
1347 * Some systems have trouble with IDE IRQs arriving while
1348 * the driver is still setting things up. So, here we disable
1349 * the IRQ used by this interface while the request is being started.
1350 * This may look bad at first, but pretty much the same thing
1351 * happens anyway when any interrupt comes in, IDE or otherwise
1352 * -- the kernel masks the IRQ while it is being handled.
1354 if (masked_irq
&& hwif
->irq
!= masked_irq
)
1355 disable_irq_nosync(hwif
->irq
);
1356 spin_unlock(&io_request_lock
);
1357 ide__sti(); /* allow other IRQs while we start this request */
1358 startstop
= start_request(drive
);
1359 spin_lock_irq(&io_request_lock
);
1360 if (masked_irq
&& hwif
->irq
!= masked_irq
)
1361 enable_irq(hwif
->irq
);
1362 if (startstop
== ide_stopped
)
1368 * ide_get_queue() returns the queue which corresponds to a given device.
1370 request_queue_t
*ide_get_queue (kdev_t dev
)
1372 ide_hwif_t
*hwif
= (ide_hwif_t
*)blk_dev
[MAJOR(dev
)].data
;
1374 return &hwif
->drives
[DEVICE_NR(dev
) & 1].queue
;
1378 * Passes the stuff to ide_do_request
1380 void do_ide_request(request_queue_t
*q
)
1382 ide_do_request(q
->queuedata
, 0);
1386 * ide_timer_expiry() is our timeout function for all drive operations.
1387 * But note that it can also be invoked as a result of a "sleep" operation
1388 * triggered by the mod_timer() call in ide_do_request.
1390 void ide_timer_expiry (unsigned long data
)
1392 ide_hwgroup_t
*hwgroup
= (ide_hwgroup_t
*) data
;
1393 ide_handler_t
*handler
;
1394 ide_expiry_t
*expiry
;
1395 unsigned long flags
;
1398 spin_lock_irqsave(&io_request_lock
, flags
);
1399 del_timer(&hwgroup
->timer
);
1401 if ((handler
= hwgroup
->handler
) == NULL
) {
1403 * Either a marginal timeout occured
1404 * (got the interrupt just as timer expired),
1405 * or we were "sleeping" to give other devices a chance.
1406 * Either way, we don't really want to complain about anything.
1408 if (hwgroup
->sleeping
) {
1409 hwgroup
->sleeping
= 0;
1413 ide_drive_t
*drive
= hwgroup
->drive
;
1415 printk("ide_timer_expiry: hwgroup->drive was NULL\n");
1416 hwgroup
->handler
= NULL
;
1419 ide_startstop_t startstop
;
1420 if (!hwgroup
->busy
) {
1421 hwgroup
->busy
= 1; /* paranoia */
1422 printk("%s: ide_timer_expiry: hwgroup->busy was 0 ??\n", drive
->name
);
1424 if ((expiry
= hwgroup
->expiry
) != NULL
) {
1426 if ((wait
= expiry(drive
)) != 0) {
1428 hwgroup
->timer
.expires
= jiffies
+ wait
;
1429 add_timer(&hwgroup
->timer
);
1430 spin_unlock_irqrestore(&io_request_lock
, flags
);
1434 hwgroup
->handler
= NULL
;
1436 * We need to simulate a real interrupt when invoking
1437 * the handler() function, which means we need to globally
1438 * mask the specific IRQ:
1440 spin_unlock(&io_request_lock
);
1442 #if DISABLE_IRQ_NOSYNC
1443 disable_irq_nosync(hwif
->irq
);
1445 disable_irq(hwif
->irq
); /* disable_irq_nosync ?? */
1446 #endif /* DISABLE_IRQ_NOSYNC */
1447 __cli(); /* local CPU only, as if we were handling an interrupt */
1448 if (hwgroup
->poll_timeout
!= 0) {
1449 startstop
= handler(drive
);
1450 } else if (drive_is_ready(drive
)) {
1451 if (drive
->waiting_for_dma
)
1452 (void) hwgroup
->hwif
->dmaproc(ide_dma_lostirq
, drive
);
1453 (void)ide_ack_intr(hwif
);
1454 printk("%s: lost interrupt\n", drive
->name
);
1455 startstop
= handler(drive
);
1457 if (drive
->waiting_for_dma
) {
1458 (void) hwgroup
->hwif
->dmaproc(ide_dma_end
, drive
);
1459 printk("%s: timeout waiting for DMA\n", drive
->name
);
1460 (void) hwgroup
->hwif
->dmaproc(ide_dma_timeout
, drive
);
1462 startstop
= ide_error(drive
, "irq timeout", GET_STAT());
1464 set_recovery_timer(hwif
);
1465 drive
->service_time
= jiffies
- drive
->service_start
;
1466 enable_irq(hwif
->irq
);
1467 spin_lock_irq(&io_request_lock
);
1468 if (startstop
== ide_stopped
)
1472 ide_do_request(hwgroup
, 0);
1473 spin_unlock_irqrestore(&io_request_lock
, flags
);
1477 * There's nothing really useful we can do with an unexpected interrupt,
1478 * other than reading the status register (to clear it), and logging it.
1479 * There should be no way that an irq can happen before we're ready for it,
1480 * so we needn't worry much about losing an "important" interrupt here.
1482 * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
1483 * drive enters "idle", "standby", or "sleep" mode, so if the status looks
1484 * "good", we just ignore the interrupt completely.
1486 * This routine assumes __cli() is in effect when called.
1488 * If an unexpected interrupt happens on irq15 while we are handling irq14
1489 * and if the two interfaces are "serialized" (CMD640), then it looks like
1490 * we could screw up by interfering with a new request being set up for irq15.
1492 * In reality, this is a non-issue. The new command is not sent unless the
1493 * drive is ready to accept one, in which case we know the drive is not
1494 * trying to interrupt us. And ide_set_handler() is always invoked before
1495 * completing the issuance of any new drive command, so we will not be
1496 * accidently invoked as a result of any valid command completion interrupt.
1499 static void unexpected_intr (int irq
, ide_hwgroup_t
*hwgroup
)
1502 ide_hwif_t
*hwif
= hwgroup
->hwif
;
1505 * handle the unexpected interrupt
1508 if (hwif
->irq
== irq
) {
1509 stat
= IN_BYTE(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
1510 if (!OK_STAT(stat
, READY_STAT
, BAD_STAT
)) {
1511 /* Try to not flood the console with msgs */
1512 static unsigned long last_msgtime
, count
;
1514 if (0 < (signed long)(jiffies
- (last_msgtime
+ HZ
))) {
1515 last_msgtime
= jiffies
;
1516 printk("%s%s: unexpected interrupt, status=0x%02x, count=%ld\n",
1517 hwif
->name
, (hwif
->next
== hwgroup
->hwif
) ? "" : "(?)", stat
, count
);
1521 } while ((hwif
= hwif
->next
) != hwgroup
->hwif
);
1525 * entry point for all interrupts, caller does __cli() for us
1527 void ide_intr (int irq
, void *dev_id
, struct pt_regs
*regs
)
1529 unsigned long flags
;
1530 ide_hwgroup_t
*hwgroup
= (ide_hwgroup_t
*)dev_id
;
1533 ide_handler_t
*handler
;
1534 ide_startstop_t startstop
;
1536 spin_lock_irqsave(&io_request_lock
, flags
);
1537 hwif
= hwgroup
->hwif
;
1539 if (!ide_ack_intr(hwif
)) {
1540 spin_unlock_irqrestore(&io_request_lock
, flags
);
1544 if ((handler
= hwgroup
->handler
) == NULL
|| hwgroup
->poll_timeout
!= 0) {
1546 * Not expecting an interrupt from this drive.
1547 * That means this could be:
1548 * (1) an interrupt from another PCI device
1549 * sharing the same PCI INT# as us.
1550 * or (2) a drive just entered sleep or standby mode,
1551 * and is interrupting to let us know.
1552 * or (3) a spurious interrupt of unknown origin.
1554 * For PCI, we cannot tell the difference,
1555 * so in that case we just ignore it and hope it goes away.
1557 #ifdef CONFIG_BLK_DEV_IDEPCI
1558 if (IDE_PCI_DEVID_EQ(hwif
->pci_devid
, IDE_PCI_DEVID_NULL
))
1559 #endif /* CONFIG_BLK_DEV_IDEPCI */
1562 * Probably not a shared PCI interrupt,
1563 * so we can safely try to do something about it:
1565 unexpected_intr(irq
, hwgroup
);
1566 #ifdef CONFIG_BLK_DEV_IDEPCI
1569 * Whack the status register, just in case we have a leftover pending IRQ.
1571 (void) IN_BYTE(hwif
->io_ports
[IDE_STATUS_OFFSET
]);
1572 #endif /* CONFIG_BLK_DEV_IDEPCI */
1574 spin_unlock_irqrestore(&io_request_lock
, flags
);
1577 drive
= hwgroup
->drive
;
1580 * This should NEVER happen, and there isn't much we could do about it here.
1582 spin_unlock_irqrestore(&io_request_lock
, flags
);
1585 if (!drive_is_ready(drive
)) {
1587 * This happens regularly when we share a PCI IRQ with another device.
1588 * Unfortunately, it can also happen with some buggy drives that trigger
1589 * the IRQ before their status register is up to date. Hopefully we have
1590 * enough advance overhead that the latter isn't a problem.
1592 spin_unlock_irqrestore(&io_request_lock
, flags
);
1595 if (!hwgroup
->busy
) {
1596 hwgroup
->busy
= 1; /* paranoia */
1597 printk("%s: ide_intr: hwgroup->busy was 0 ??\n", drive
->name
);
1599 hwgroup
->handler
= NULL
;
1600 del_timer(&hwgroup
->timer
);
1601 spin_unlock(&io_request_lock
);
1604 ide__sti(); /* local CPU only */
1605 startstop
= handler(drive
); /* service this interrupt, may set handler for next interrupt */
1606 spin_lock_irq(&io_request_lock
);
1609 * Note that handler() may have set things up for another
1610 * interrupt to occur soon, but it cannot happen until
1611 * we exit from this routine, because it will be the
1612 * same irq as is currently being serviced here, and Linux
1613 * won't allow another of the same (on any CPU) until we return.
1615 set_recovery_timer(HWIF(drive
));
1616 drive
->service_time
= jiffies
- drive
->service_start
;
1617 if (startstop
== ide_stopped
) {
1618 if (hwgroup
->handler
== NULL
) { /* paranoia */
1620 ide_do_request(hwgroup
, hwif
->irq
);
1622 printk("%s: ide_intr: huh? expected NULL handler on exit\n", drive
->name
);
1625 spin_unlock_irqrestore(&io_request_lock
, flags
);
1629 * get_info_ptr() returns the (ide_drive_t *) for a given device number.
1630 * It returns NULL if the given device number does not match any present drives.
1632 ide_drive_t
*get_info_ptr (kdev_t i_rdev
)
1634 int major
= MAJOR(i_rdev
);
1636 int minor
= MINOR(i_rdev
) & PARTN_MASK
;
1640 for (h
= 0; h
< MAX_HWIFS
; ++h
) {
1641 ide_hwif_t
*hwif
= &ide_hwifs
[h
];
1642 if (hwif
->present
&& major
== hwif
->major
) {
1643 unsigned unit
= DEVICE_NR(i_rdev
);
1644 if (unit
< MAX_DRIVES
) {
1645 ide_drive_t
*drive
= &hwif
->drives
[unit
];
1647 if ((drive
->present
) && (drive
->part
[minor
].nr_sects
))
1660 * This function is intended to be used prior to invoking ide_do_drive_cmd().
1662 void ide_init_drive_cmd (struct request
*rq
)
1664 memset(rq
, 0, sizeof(*rq
));
1665 rq
->cmd
= IDE_DRIVE_CMD
;
1669 * This function issues a special IDE device request
1670 * onto the request queue.
1672 * If action is ide_wait, then the rq is queued at the end of the
1673 * request queue, and the function sleeps until it has been processed.
1674 * This is for use when invoked from an ioctl handler.
1676 * If action is ide_preempt, then the rq is queued at the head of
1677 * the request queue, displacing the currently-being-processed
1678 * request and this function returns immediately without waiting
1679 * for the new rq to be completed. This is VERY DANGEROUS, and is
1680 * intended for careful use by the ATAPI tape/cdrom driver code.
1682 * If action is ide_next, then the rq is queued immediately after
1683 * the currently-being-processed-request (if any), and the function
1684 * returns without waiting for the new rq to be completed. As above,
1685 * This is VERY DANGEROUS, and is intended for careful use by the
1686 * ATAPI tape/cdrom driver code.
1688 * If action is ide_end, then the rq is queued at the end of the
1689 * request queue, and the function returns immediately without waiting
1690 * for the new rq to be completed. This is again intended for careful
1691 * use by the ATAPI tape/cdrom driver code.
1693 int ide_do_drive_cmd (ide_drive_t
*drive
, struct request
*rq
, ide_action_t action
)
1695 unsigned long flags
;
1696 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
1697 unsigned int major
= HWIF(drive
)->major
;
1698 struct list_head
* queue_head
;
1699 DECLARE_MUTEX_LOCKED(sem
);
1701 #ifdef CONFIG_BLK_DEV_PDC4030
1702 if (HWIF(drive
)->chipset
== ide_pdc4030
&& rq
->buffer
!= NULL
)
1703 return -ENOSYS
; /* special drive cmds not supported */
1706 rq
->rq_status
= RQ_ACTIVE
;
1707 rq
->rq_dev
= MKDEV(major
,(drive
->select
.b
.unit
)<<PARTN_BITS
);
1708 if (action
== ide_wait
)
1710 spin_lock_irqsave(&io_request_lock
, flags
);
1711 queue_head
= &drive
->queue
.queue_head
;
1712 if (list_empty(queue_head
) || action
== ide_preempt
) {
1713 if (action
== ide_preempt
)
1716 if (action
== ide_wait
|| action
== ide_end
) {
1717 queue_head
= queue_head
->prev
;
1719 queue_head
= queue_head
->next
;
1721 list_add(&rq
->queue
, queue_head
);
1722 ide_do_request(hwgroup
, 0);
1723 spin_unlock_irqrestore(&io_request_lock
, flags
);
1724 if (action
== ide_wait
) {
1725 down(&sem
); /* wait for it to be serviced */
1726 return rq
->errors
? -EIO
: 0; /* return -EIO if errors */
1733 * This routine is called to flush all partitions and partition tables
1734 * for a changed disk, and then re-read the new partition table.
1735 * If we are revalidating a disk because of a media change, then we
1736 * enter with usage == 0. If we are using an ioctl, we automatically have
1737 * usage == 1 (we need an open channel to use an ioctl :-), so this
1740 int ide_revalidate_disk (kdev_t i_rdev
)
1743 ide_hwgroup_t
*hwgroup
;
1744 unsigned int p
, major
, minor
;
1747 if ((drive
= get_info_ptr(i_rdev
)) == NULL
)
1749 major
= MAJOR(i_rdev
);
1750 minor
= drive
->select
.b
.unit
<< PARTN_BITS
;
1751 hwgroup
= HWGROUP(drive
);
1752 spin_lock_irqsave(&io_request_lock
, flags
);
1753 if (drive
->busy
|| (drive
->usage
> 1)) {
1754 spin_unlock_irqrestore(&io_request_lock
, flags
);
1759 spin_unlock_irqrestore(&io_request_lock
, flags
);
1761 for (p
= 0; p
< (1<<PARTN_BITS
); ++p
) {
1762 if (drive
->part
[p
].nr_sects
> 0) {
1763 kdev_t devp
= MKDEV(major
, minor
+p
);
1764 struct super_block
* sb
= get_super(devp
);
1767 invalidate_inodes(sb
);
1768 invalidate_buffers (devp
);
1769 set_blocksize(devp
, 1024);
1771 drive
->part
[p
].start_sect
= 0;
1772 drive
->part
[p
].nr_sects
= 0;
1775 if (DRIVER(drive
)->revalidate
)
1776 DRIVER(drive
)->revalidate(drive
);
1779 wake_up(&drive
->wqueue
);
1784 static void revalidate_drives (void)
1790 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
1791 hwif
= &ide_hwifs
[index
];
1792 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1793 drive
= &ide_hwifs
[index
].drives
[unit
];
1794 if (drive
->revalidate
) {
1795 drive
->revalidate
= 0;
1797 (void) ide_revalidate_disk(MKDEV(hwif
->major
, unit
<<PARTN_BITS
));
1803 static void ide_probe_module (void)
1806 #if defined(CONFIG_KMOD) && defined(CONFIG_BLK_DEV_IDE_MODULE)
1807 (void) request_module("ide-probe-mod");
1808 #endif /* (CONFIG_KMOD) && (CONFIG_BLK_DEV_IDE_MODULE) */
1810 (void) ide_probe
->init();
1812 revalidate_drives();
1815 static void ide_driver_module (void)
1818 ide_module_t
*module
= ide_modules
;
1820 for (index
= 0; index
< MAX_HWIFS
; ++index
)
1821 if (ide_hwifs
[index
].present
)
1826 (void) module
->init();
1827 module
= module
->next
;
1829 revalidate_drives();
1832 static int ide_open (struct inode
* inode
, struct file
* filp
)
1837 if ((drive
= get_info_ptr(inode
->i_rdev
)) == NULL
)
1840 if (drive
->driver
== NULL
)
1841 ide_driver_module();
1843 if (drive
->driver
== NULL
) {
1844 if (drive
->media
== ide_disk
)
1845 (void) request_module("ide-disk");
1846 if (drive
->media
== ide_cdrom
)
1847 (void) request_module("ide-cd");
1848 if (drive
->media
== ide_tape
)
1849 (void) request_module("ide-tape");
1850 if (drive
->media
== ide_floppy
)
1851 (void) request_module("ide-floppy");
1853 #endif /* CONFIG_KMOD */
1855 sleep_on(&drive
->wqueue
);
1857 if (drive
->driver
!= NULL
) {
1858 if ((rc
= DRIVER(drive
)->open(inode
, filp
, drive
)))
1862 printk ("%s: driver not present\n", drive
->name
);
1869 * Releasing a block device means we sync() it, so that it can safely
1870 * be forgotten about...
1872 static int ide_release (struct inode
* inode
, struct file
* file
)
1876 if ((drive
= get_info_ptr(inode
->i_rdev
)) != NULL
) {
1878 if (drive
->driver
!= NULL
)
1879 DRIVER(drive
)->release(inode
, file
, drive
);
1885 int ide_replace_subdriver (ide_drive_t
*drive
, const char *driver
)
1887 if (!drive
->present
|| drive
->busy
|| drive
->usage
)
1889 if (drive
->driver
!= NULL
&& DRIVER(drive
)->cleanup(drive
))
1891 strncpy(drive
->driver_req
, driver
, 9);
1892 ide_driver_module();
1893 drive
->driver_req
[0] = 0;
1894 ide_driver_module();
1895 if (DRIVER(drive
) && !strcmp(DRIVER(drive
)->name
, driver
))
1901 #ifdef CONFIG_PROC_FS
1902 ide_proc_entry_t generic_subdriver_entries
[] = {
1903 { "capacity", S_IFREG
|S_IRUGO
, proc_ide_read_capacity
, NULL
},
1904 { NULL
, 0, NULL
, NULL
}
1909 * Note that we only release the standard ports,
1910 * and do not even try to handle any extra ports
1911 * allocated for weird IDE interface chipsets.
1913 void hwif_unregister (ide_hwif_t
*hwif
)
1915 if (hwif
->straight8
) {
1916 ide_release_region(hwif
->io_ports
[IDE_DATA_OFFSET
], 8);
1919 if (hwif
->io_ports
[IDE_DATA_OFFSET
])
1920 ide_release_region(hwif
->io_ports
[IDE_DATA_OFFSET
], 1);
1921 if (hwif
->io_ports
[IDE_ERROR_OFFSET
])
1922 ide_release_region(hwif
->io_ports
[IDE_ERROR_OFFSET
], 1);
1923 if (hwif
->io_ports
[IDE_NSECTOR_OFFSET
])
1924 ide_release_region(hwif
->io_ports
[IDE_NSECTOR_OFFSET
], 1);
1925 if (hwif
->io_ports
[IDE_SECTOR_OFFSET
])
1926 ide_release_region(hwif
->io_ports
[IDE_SECTOR_OFFSET
], 1);
1927 if (hwif
->io_ports
[IDE_LCYL_OFFSET
])
1928 ide_release_region(hwif
->io_ports
[IDE_LCYL_OFFSET
], 1);
1929 if (hwif
->io_ports
[IDE_HCYL_OFFSET
])
1930 ide_release_region(hwif
->io_ports
[IDE_HCYL_OFFSET
], 1);
1931 if (hwif
->io_ports
[IDE_SELECT_OFFSET
])
1932 ide_release_region(hwif
->io_ports
[IDE_SELECT_OFFSET
], 1);
1933 if (hwif
->io_ports
[IDE_STATUS_OFFSET
])
1934 ide_release_region(hwif
->io_ports
[IDE_STATUS_OFFSET
], 1);
1936 if (hwif
->io_ports
[IDE_CONTROL_OFFSET
])
1937 ide_release_region(hwif
->io_ports
[IDE_CONTROL_OFFSET
], 1);
1938 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
1939 if (hwif
->io_ports
[IDE_IRQ_OFFSET
])
1940 ide_release_region(hwif
->io_ports
[IDE_IRQ_OFFSET
], 1);
1941 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
1944 void ide_unregister (unsigned int index
)
1946 struct gendisk
*gd
, **gdp
;
1947 ide_drive_t
*drive
, *d
;
1948 ide_hwif_t
*hwif
, *g
;
1949 ide_hwgroup_t
*hwgroup
;
1950 int irq_count
= 0, unit
, i
;
1951 unsigned long flags
;
1952 unsigned int p
, minor
;
1953 ide_hwif_t old_hwif
;
1955 if (index
>= MAX_HWIFS
)
1957 save_flags(flags
); /* all CPUs */
1958 cli(); /* all CPUs */
1959 hwif
= &ide_hwifs
[index
];
1962 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1963 drive
= &hwif
->drives
[unit
];
1964 if (!drive
->present
)
1966 if (drive
->busy
|| drive
->usage
)
1968 if (drive
->driver
!= NULL
&& DRIVER(drive
)->cleanup(drive
))
1974 * All clear? Then blow away the buffer cache
1977 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
1978 drive
= &hwif
->drives
[unit
];
1979 if (!drive
->present
)
1981 minor
= drive
->select
.b
.unit
<< PARTN_BITS
;
1982 for (p
= 0; p
< (1<<PARTN_BITS
); ++p
) {
1983 if (drive
->part
[p
].nr_sects
> 0) {
1984 kdev_t devp
= MKDEV(hwif
->major
, minor
+p
);
1985 struct super_block
* sb
= get_super(devp
);
1986 if (sb
) invalidate_inodes(sb
);
1987 invalidate_buffers (devp
);
1990 #ifdef CONFIG_PROC_FS
1991 destroy_proc_ide_drives(hwif
);
1995 hwgroup
= hwif
->hwgroup
;
1998 * free the irq if we were the only hwif using it
2002 if (g
->irq
== hwif
->irq
)
2005 } while (g
!= hwgroup
->hwif
);
2007 free_irq(hwif
->irq
, hwgroup
);
2010 * Note that we only release the standard ports,
2011 * and do not even try to handle any extra ports
2012 * allocated for weird IDE interface chipsets.
2014 hwif_unregister(hwif
);
2017 * Remove us from the hwgroup, and free
2018 * the hwgroup if we were the only member
2021 for (i
= 0; i
< MAX_DRIVES
; ++i
) {
2022 drive
= &hwif
->drives
[i
];
2024 devfs_unregister (drive
->de
);
2027 if (!drive
->present
)
2029 while (hwgroup
->drive
->next
!= drive
)
2030 hwgroup
->drive
= hwgroup
->drive
->next
;
2031 hwgroup
->drive
->next
= drive
->next
;
2032 if (hwgroup
->drive
== drive
)
2033 hwgroup
->drive
= NULL
;
2034 if (drive
->id
!= NULL
) {
2039 blk_cleanup_queue(&drive
->queue
);
2043 while (hwgroup
->hwif
->next
!= hwif
)
2044 hwgroup
->hwif
= hwgroup
->hwif
->next
;
2045 hwgroup
->hwif
->next
= hwif
->next
;
2046 if (hwgroup
->hwif
== hwif
)
2049 hwgroup
->hwif
= HWIF(hwgroup
->drive
);
2051 #if defined(CONFIG_BLK_DEV_IDEDMA) && !defined(CONFIG_DMA_NONPCI)
2052 if (hwif
->dma_base
) {
2053 (void) ide_release_dma(hwif
);
2056 #endif /* (CONFIG_BLK_DEV_IDEDMA) && !(CONFIG_DMA_NONPCI) */
2059 * Remove us from the kernel's knowledge
2061 unregister_blkdev(hwif
->major
, hwif
->name
);
2062 kfree(blksize_size
[hwif
->major
]);
2063 kfree(max_sectors
[hwif
->major
]);
2064 kfree(max_readahead
[hwif
->major
]);
2065 blk_dev
[hwif
->major
].data
= NULL
;
2066 blk_dev
[hwif
->major
].queue
= NULL
;
2067 blksize_size
[hwif
->major
] = NULL
;
2068 for (gdp
= &gendisk_head
; *gdp
; gdp
= &((*gdp
)->next
))
2069 if (*gdp
== hwif
->gd
)
2072 printk("gd not in disk chain!\n");
2074 gd
= *gdp
; *gdp
= gd
->next
;
2084 init_hwif_data (index
); /* restore hwif data to pristine status */
2085 hwif
->hwgroup
= old_hwif
.hwgroup
;
2086 hwif
->tuneproc
= old_hwif
.tuneproc
;
2087 hwif
->speedproc
= old_hwif
.speedproc
;
2088 hwif
->selectproc
= old_hwif
.selectproc
;
2089 hwif
->resetproc
= old_hwif
.resetproc
;
2090 hwif
->intrproc
= old_hwif
.intrproc
;
2091 hwif
->maskproc
= old_hwif
.maskproc
;
2092 hwif
->quirkproc
= old_hwif
.quirkproc
;
2093 hwif
->rwproc
= old_hwif
.rwproc
;
2094 hwif
->dmaproc
= old_hwif
.dmaproc
;
2095 hwif
->dma_base
= old_hwif
.dma_base
;
2096 hwif
->dma_extra
= old_hwif
.dma_extra
;
2097 hwif
->config_data
= old_hwif
.config_data
;
2098 hwif
->select_data
= old_hwif
.select_data
;
2099 hwif
->proc
= old_hwif
.proc
;
2100 #ifndef CONFIG_BLK_DEV_IDECS
2101 hwif
->irq
= old_hwif
.irq
;
2102 #endif /* CONFIG_BLK_DEV_IDECS */
2103 hwif
->major
= old_hwif
.major
;
2104 hwif
->chipset
= old_hwif
.chipset
;
2105 hwif
->autodma
= old_hwif
.autodma
;
2106 hwif
->udma_four
= old_hwif
.udma_four
;
2107 #ifdef CONFIG_BLK_DEV_IDEPCI
2108 hwif
->pci_dev
= old_hwif
.pci_dev
;
2109 hwif
->pci_devid
= old_hwif
.pci_devid
;
2110 #endif /* CONFIG_BLK_DEV_IDEPCI */
2111 hwif
->straight8
= old_hwif
.straight8
;
2112 hwif
->hwif_data
= old_hwif
.hwif_data
;
2114 restore_flags(flags
); /* all CPUs */
2118 * Setup hw_regs_t structure described by parameters. You
2119 * may set up the hw structure yourself OR use this routine to
2122 void ide_setup_ports ( hw_regs_t
*hw
,
2123 ide_ioreg_t base
, int *offsets
,
2124 ide_ioreg_t ctrl
, ide_ioreg_t intr
,
2125 ide_ack_intr_t
*ack_intr
, int irq
)
2129 for (i
= 0; i
< IDE_NR_PORTS
; i
++) {
2130 if (offsets
[i
] == -1) {
2132 case IDE_CONTROL_OFFSET
:
2133 hw
->io_ports
[i
] = ctrl
;
2135 #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC)
2136 case IDE_IRQ_OFFSET
:
2137 hw
->io_ports
[i
] = intr
;
2139 #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */
2141 hw
->io_ports
[i
] = 0;
2145 hw
->io_ports
[i
] = base
+ offsets
[i
];
2150 hw
->ack_intr
= ack_intr
;
2154 * Register an IDE interface, specifing exactly the registers etc
2155 * Set init=1 iff calling before probes have taken place.
2157 int ide_register_hw (hw_regs_t
*hw
, ide_hwif_t
**hwifp
)
2159 int index
, retry
= 1;
2163 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
2164 hwif
= &ide_hwifs
[index
];
2165 if (hwif
->hw
.io_ports
[IDE_DATA_OFFSET
] == hw
->io_ports
[IDE_DATA_OFFSET
])
2168 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
2169 hwif
= &ide_hwifs
[index
];
2170 if ((!hwif
->present
&& !hwif
->mate
&& !initializing
) ||
2171 (!hwif
->hw
.io_ports
[IDE_DATA_OFFSET
] && initializing
))
2174 for (index
= 0; index
< MAX_HWIFS
; index
++)
2175 ide_unregister(index
);
2180 ide_unregister(index
);
2183 memcpy(&hwif
->hw
, hw
, sizeof(*hw
));
2184 memcpy(hwif
->io_ports
, hwif
->hw
.io_ports
, sizeof(hwif
->hw
.io_ports
));
2185 hwif
->irq
= hw
->irq
;
2188 if (!initializing
) {
2190 #ifdef CONFIG_PROC_FS
2191 create_proc_ide_interfaces();
2193 ide_driver_module();
2199 return (initializing
|| hwif
->present
) ? index
: -1;
2203 * Compatability function with existing drivers. If you want
2204 * something different, use the function above.
2206 int ide_register (int arg1
, int arg2
, int irq
)
2209 ide_init_hwif_ports(&hw
, (ide_ioreg_t
) arg1
, (ide_ioreg_t
) arg2
, NULL
);
2211 return ide_register_hw(&hw
, NULL
);
2214 void ide_add_setting (ide_drive_t
*drive
, const char *name
, int rw
, int read_ioctl
, int write_ioctl
, int data_type
, int min
, int max
, int mul_factor
, int div_factor
, void *data
, ide_procset_t
*set
)
2216 ide_settings_t
**p
= (ide_settings_t
**) &drive
->settings
, *setting
= NULL
;
2218 while ((*p
) && strcmp((*p
)->name
, name
) < 0)
2220 if ((setting
= kmalloc(sizeof(*setting
), GFP_KERNEL
)) == NULL
)
2222 memset(setting
, 0, sizeof(*setting
));
2223 if ((setting
->name
= kmalloc(strlen(name
) + 1, GFP_KERNEL
)) == NULL
)
2225 strcpy(setting
->name
, name
); setting
->rw
= rw
;
2226 setting
->read_ioctl
= read_ioctl
; setting
->write_ioctl
= write_ioctl
;
2227 setting
->data_type
= data_type
; setting
->min
= min
;
2228 setting
->max
= max
; setting
->mul_factor
= mul_factor
;
2229 setting
->div_factor
= div_factor
; setting
->data
= data
;
2230 setting
->set
= set
; setting
->next
= *p
;
2232 setting
->auto_remove
= 1;
2240 void ide_remove_setting (ide_drive_t
*drive
, char *name
)
2242 ide_settings_t
**p
= (ide_settings_t
**) &drive
->settings
, *setting
;
2244 while ((*p
) && strcmp((*p
)->name
, name
))
2246 if ((setting
= (*p
)) == NULL
)
2248 (*p
) = setting
->next
;
2249 kfree(setting
->name
);
2253 static ide_settings_t
*ide_find_setting_by_ioctl (ide_drive_t
*drive
, int cmd
)
2255 ide_settings_t
*setting
= drive
->settings
;
2258 if (setting
->read_ioctl
== cmd
|| setting
->write_ioctl
== cmd
)
2260 setting
= setting
->next
;
2265 ide_settings_t
*ide_find_setting_by_name (ide_drive_t
*drive
, char *name
)
2267 ide_settings_t
*setting
= drive
->settings
;
2270 if (strcmp(setting
->name
, name
) == 0)
2272 setting
= setting
->next
;
2277 static void auto_remove_settings (ide_drive_t
*drive
)
2279 ide_settings_t
*setting
;
2281 setting
= drive
->settings
;
2283 if (setting
->auto_remove
) {
2284 ide_remove_setting(drive
, setting
->name
);
2287 setting
= setting
->next
;
2291 int ide_read_setting (ide_drive_t
*drive
, ide_settings_t
*setting
)
2294 unsigned long flags
;
2296 if ((setting
->rw
& SETTING_READ
)) {
2297 spin_lock_irqsave(&io_request_lock
, flags
);
2298 switch(setting
->data_type
) {
2300 val
= *((u8
*) setting
->data
);
2303 val
= *((u16
*) setting
->data
);
2307 val
= *((u32
*) setting
->data
);
2310 spin_unlock_irqrestore(&io_request_lock
, flags
);
2315 int ide_spin_wait_hwgroup (ide_drive_t
*drive
)
2317 ide_hwgroup_t
*hwgroup
= HWGROUP(drive
);
2318 unsigned long timeout
= jiffies
+ (3 * HZ
);
2320 spin_lock_irq(&io_request_lock
);
2322 while (hwgroup
->busy
) {
2323 unsigned long lflags
;
2324 spin_unlock_irq(&io_request_lock
);
2325 __save_flags(lflags
); /* local CPU only */
2326 __sti(); /* local CPU only; needed for jiffies */
2327 if (0 < (signed long)(jiffies
- timeout
)) {
2328 __restore_flags(lflags
); /* local CPU only */
2329 printk("%s: channel busy\n", drive
->name
);
2332 __restore_flags(lflags
); /* local CPU only */
2333 spin_lock_irq(&io_request_lock
);
2339 * FIXME: This should be changed to enqueue a special request
2340 * to the driver to change settings, and then wait on a sema for completion.
2341 * The current scheme of polling is kludgey, though safe enough.
2343 int ide_write_setting (ide_drive_t
*drive
, ide_settings_t
*setting
, int val
)
2348 if (!capable(CAP_SYS_ADMIN
))
2350 if (!(setting
->rw
& SETTING_WRITE
))
2352 if (val
< setting
->min
|| val
> setting
->max
)
2355 return setting
->set(drive
, val
);
2356 if (ide_spin_wait_hwgroup(drive
))
2358 switch (setting
->data_type
) {
2360 *((u8
*) setting
->data
) = val
;
2363 *((u16
*) setting
->data
) = val
;
2366 *((u32
*) setting
->data
) = val
;
2369 p
= (u32
*) setting
->data
;
2370 for (i
= 0; i
< 1 << PARTN_BITS
; i
++, p
++)
2374 spin_unlock_irq(&io_request_lock
);
2378 static int set_io_32bit(ide_drive_t
*drive
, int arg
)
2380 drive
->io_32bit
= arg
;
2381 #ifdef CONFIG_BLK_DEV_DTC2278
2382 if (HWIF(drive
)->chipset
== ide_dtc2278
)
2383 HWIF(drive
)->drives
[!drive
->select
.b
.unit
].io_32bit
= arg
;
2384 #endif /* CONFIG_BLK_DEV_DTC2278 */
2388 static int set_using_dma (ide_drive_t
*drive
, int arg
)
2390 if (!drive
->driver
|| !DRIVER(drive
)->supports_dma
)
2392 if (!drive
->id
|| !(drive
->id
->capability
& 1) || !HWIF(drive
)->dmaproc
)
2394 if (HWIF(drive
)->dmaproc(arg
? ide_dma_on
: ide_dma_off
, drive
))
2399 static int set_pio_mode (ide_drive_t
*drive
, int arg
)
2403 if (!HWIF(drive
)->tuneproc
)
2405 if (drive
->special
.b
.set_tune
)
2407 ide_init_drive_cmd(&rq
);
2408 drive
->tune_req
= (byte
) arg
;
2409 drive
->special
.b
.set_tune
= 1;
2410 (void) ide_do_drive_cmd (drive
, &rq
, ide_wait
);
2414 void ide_add_generic_settings (ide_drive_t
*drive
)
2417 * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function
2419 ide_add_setting(drive
, "io_32bit", drive
->no_io_32bit
? SETTING_READ
: SETTING_RW
, HDIO_GET_32BIT
, HDIO_SET_32BIT
, TYPE_BYTE
, 0, 1 + (SUPPORT_VLB_SYNC
<< 1), 1, 1, &drive
->io_32bit
, set_io_32bit
);
2420 ide_add_setting(drive
, "keepsettings", SETTING_RW
, HDIO_GET_KEEPSETTINGS
, HDIO_SET_KEEPSETTINGS
, TYPE_BYTE
, 0, 1, 1, 1, &drive
->keep_settings
, NULL
);
2421 ide_add_setting(drive
, "nice1", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 1, 1, 1, &drive
->nice1
, NULL
);
2422 ide_add_setting(drive
, "pio_mode", SETTING_WRITE
, -1, HDIO_SET_PIO_MODE
, TYPE_BYTE
, 0, 255, 1, 1, NULL
, set_pio_mode
);
2423 ide_add_setting(drive
, "slow", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 1, 1, 1, &drive
->slow
, NULL
);
2424 ide_add_setting(drive
, "unmaskirq", drive
->no_unmask
? SETTING_READ
: SETTING_RW
, HDIO_GET_UNMASKINTR
, HDIO_SET_UNMASKINTR
, TYPE_BYTE
, 0, 1, 1, 1, &drive
->unmask
, NULL
);
2425 ide_add_setting(drive
, "using_dma", SETTING_RW
, HDIO_GET_DMA
, HDIO_SET_DMA
, TYPE_BYTE
, 0, 1, 1, 1, &drive
->using_dma
, set_using_dma
);
2426 ide_add_setting(drive
, "ide_scsi", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 1, 1, 1, &drive
->scsi
, NULL
);
2427 ide_add_setting(drive
, "init_speed", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 69, 1, 1, &drive
->init_speed
, NULL
);
2428 ide_add_setting(drive
, "current_speed", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 69, 1, 1, &drive
->current_speed
, NULL
);
2429 ide_add_setting(drive
, "number", SETTING_RW
, -1, -1, TYPE_BYTE
, 0, 3, 1, 1, &drive
->dn
, NULL
);
2432 int ide_wait_cmd (ide_drive_t
*drive
, int cmd
, int nsect
, int feature
, int sectors
, byte
*buf
)
2439 memset(buf
, 0, 4 + SECTOR_WORDS
* 4 * sectors
);
2440 ide_init_drive_cmd(&rq
);
2446 return ide_do_drive_cmd(drive
, &rq
, ide_wait
);
2449 int ide_wait_cmd_task (ide_drive_t
*drive
, byte
*buf
)
2453 ide_init_drive_cmd(&rq
);
2454 rq
.cmd
= IDE_DRIVE_TASK
;
2456 return ide_do_drive_cmd(drive
, &rq
, ide_wait
);
2460 * Delay for *at least* 50ms. As we don't know how much time is left
2461 * until the next tick occurs, we wait an extra tick to be safe.
2462 * This is used only during the probing/polling for drives at boot time.
2464 * However, its usefullness may be needed in other places, thus we export it now.
2465 * The future may change this to a millisecond setable delay.
2467 void ide_delay_50ms (void)
2469 #ifndef CONFIG_BLK_DEV_IDECS
2470 unsigned long timeout
= jiffies
+ ((HZ
+ 19)/20) + 1;
2471 while (0 < (signed long)(timeout
- jiffies
));
2473 __set_current_state(TASK_UNINTERRUPTIBLE
);
2474 schedule_timeout(HZ
/20);
2475 #endif /* CONFIG_BLK_DEV_IDECS */
2478 int system_bus_clock (void)
2480 return((int) ((!system_bus_speed
) ? ide_system_bus_speed() : system_bus_speed
));
2483 static int ide_ioctl (struct inode
*inode
, struct file
*file
,
2484 unsigned int cmd
, unsigned long arg
)
2486 int err
= 0, major
, minor
;
2490 ide_settings_t
*setting
;
2492 if (!inode
|| !(dev
= inode
->i_rdev
))
2494 major
= MAJOR(dev
); minor
= MINOR(dev
);
2495 if ((drive
= get_info_ptr(inode
->i_rdev
)) == NULL
)
2498 if ((setting
= ide_find_setting_by_ioctl(drive
, cmd
)) != NULL
) {
2499 if (cmd
== setting
->read_ioctl
) {
2500 err
= ide_read_setting(drive
, setting
);
2501 return err
>= 0 ? put_user(err
, (long *) arg
) : err
;
2503 if ((MINOR(inode
->i_rdev
) & PARTN_MASK
))
2505 return ide_write_setting(drive
, setting
, arg
);
2509 ide_init_drive_cmd (&rq
);
2513 struct hd_geometry
*loc
= (struct hd_geometry
*) arg
;
2514 unsigned short bios_cyl
= drive
->bios_cyl
; /* truncate */
2515 if (!loc
|| (drive
->media
!= ide_disk
&& drive
->media
!= ide_floppy
)) return -EINVAL
;
2516 if (put_user(drive
->bios_head
, (byte
*) &loc
->heads
)) return -EFAULT
;
2517 if (put_user(drive
->bios_sect
, (byte
*) &loc
->sectors
)) return -EFAULT
;
2518 if (put_user(bios_cyl
, (unsigned short *) &loc
->cylinders
)) return -EFAULT
;
2519 if (put_user((unsigned)drive
->part
[MINOR(inode
->i_rdev
)&PARTN_MASK
].start_sect
,
2520 (unsigned long *) &loc
->start
)) return -EFAULT
;
2524 case HDIO_GETGEO_BIG
:
2526 struct hd_big_geometry
*loc
= (struct hd_big_geometry
*) arg
;
2527 if (!loc
|| (drive
->media
!= ide_disk
&& drive
->media
!= ide_floppy
)) return -EINVAL
;
2528 if (put_user(drive
->bios_head
, (byte
*) &loc
->heads
)) return -EFAULT
;
2529 if (put_user(drive
->bios_sect
, (byte
*) &loc
->sectors
)) return -EFAULT
;
2530 if (put_user(drive
->bios_cyl
, (unsigned int *) &loc
->cylinders
)) return -EFAULT
;
2531 if (put_user((unsigned)drive
->part
[MINOR(inode
->i_rdev
)&PARTN_MASK
].start_sect
,
2532 (unsigned long *) &loc
->start
)) return -EFAULT
;
2536 case HDIO_GETGEO_BIG_RAW
:
2538 struct hd_big_geometry
*loc
= (struct hd_big_geometry
*) arg
;
2539 if (!loc
|| (drive
->media
!= ide_disk
&& drive
->media
!= ide_floppy
)) return -EINVAL
;
2540 if (put_user(drive
->head
, (byte
*) &loc
->heads
)) return -EFAULT
;
2541 if (put_user(drive
->sect
, (byte
*) &loc
->sectors
)) return -EFAULT
;
2542 if (put_user(drive
->cyl
, (unsigned int *) &loc
->cylinders
)) return -EFAULT
;
2543 if (put_user((unsigned)drive
->part
[MINOR(inode
->i_rdev
)&PARTN_MASK
].start_sect
,
2544 (unsigned long *) &loc
->start
)) return -EFAULT
;
2548 case BLKGETSIZE
: /* Return device size */
2549 return put_user(drive
->part
[MINOR(inode
->i_rdev
)&PARTN_MASK
].nr_sects
, (long *) arg
);
2551 case BLKRRPART
: /* Re-read partition tables */
2552 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2553 return ide_revalidate_disk(inode
->i_rdev
);
2555 case HDIO_OBSOLETE_IDENTITY
:
2556 case HDIO_GET_IDENTITY
:
2557 if (MINOR(inode
->i_rdev
) & PARTN_MASK
)
2559 if (drive
->id
== NULL
)
2561 if (copy_to_user((char *)arg
, (char *)drive
->id
, (cmd
== HDIO_GET_IDENTITY
) ? sizeof(*drive
->id
) : 142))
2566 return put_user(drive
->dsc_overlap
<< IDE_NICE_DSC_OVERLAP
|
2567 drive
->atapi_overlap
<< IDE_NICE_ATAPI_OVERLAP
|
2568 drive
->nice0
<< IDE_NICE_0
|
2569 drive
->nice1
<< IDE_NICE_1
|
2570 drive
->nice2
<< IDE_NICE_2
,
2572 case HDIO_DRIVE_CMD
:
2574 byte args
[4], *argbuf
= args
;
2577 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
)) return -EACCES
;
2578 if (NULL
== (void *) arg
)
2579 return ide_do_drive_cmd(drive
, &rq
, ide_wait
);
2580 if (copy_from_user(args
, (void *)arg
, 4))
2583 argsize
= 4 + (SECTOR_WORDS
* 4 * args
[3]);
2584 argbuf
= kmalloc(argsize
, GFP_KERNEL
);
2587 memcpy(argbuf
, args
, 4);
2590 if (set_transfer(drive
, args
[0], args
[1], args
[2])) {
2591 xfer_rate
= args
[1];
2592 if (ide_ata66_check(drive
, args
[0], args
[1], args
[2]))
2596 err
= ide_wait_cmd(drive
, args
[0], args
[1], args
[2], args
[3], argbuf
);
2598 if (!err
&& xfer_rate
) {
2599 /* active-retuning-calls future */
2600 if ((HWIF(drive
)->speedproc
) != NULL
)
2601 HWIF(drive
)->speedproc(drive
, xfer_rate
);
2602 ide_driveid_update(drive
);
2605 if (copy_to_user((void *)arg
, argbuf
, argsize
))
2611 case HDIO_DRIVE_TASK
:
2613 byte args
[7], *argbuf
= args
;
2615 if (!capable(CAP_SYS_ADMIN
) || !capable(CAP_SYS_RAWIO
)) return -EACCES
;
2616 if (copy_from_user(args
, (void *)arg
, 7))
2618 err
= ide_wait_cmd_task(drive
, argbuf
);
2619 if (copy_to_user((void *)arg
, argbuf
, argsize
))
2623 case HDIO_SCAN_HWIF
:
2626 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2627 if (copy_from_user(args
, (void *)arg
, 3 * sizeof(int)))
2629 if (ide_register(args
[0], args
[1], args
[2]) == -1)
2633 case HDIO_UNREGISTER_HWIF
:
2634 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2635 /* (arg > MAX_HWIFS) checked in function */
2636 ide_unregister(arg
);
2639 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2640 if (drive
->driver
== NULL
)
2642 if (arg
!= (arg
& ((1 << IDE_NICE_DSC_OVERLAP
) | (1 << IDE_NICE_1
))))
2644 drive
->dsc_overlap
= (arg
>> IDE_NICE_DSC_OVERLAP
) & 1;
2645 if (drive
->dsc_overlap
&& !DRIVER(drive
)->supports_dsc_overlap
) {
2646 drive
->dsc_overlap
= 0;
2649 drive
->nice1
= (arg
>> IDE_NICE_1
) & 1;
2651 case HDIO_DRIVE_RESET
:
2652 if (!capable(CAP_SYS_ADMIN
)) return -EACCES
;
2653 (void) ide_do_reset(drive
);
2654 if (drive
->suspend_reset
) {
2656 * APM WAKE UP todo !!
2657 * int nogoodpower = 1;
2658 * while(nogoodpower) {
2659 * check_power1() or check_power2()
2662 * HWIF(drive)->multiproc(drive);
2664 return ide_revalidate_disk(inode
->i_rdev
);
2675 return blk_ioctl(inode
->i_rdev
, cmd
, arg
);
2678 if (drive
->driver
!= NULL
)
2679 return DRIVER(drive
)->ioctl(drive
, inode
, file
, cmd
, arg
);
2684 static int ide_check_media_change (kdev_t i_rdev
)
2688 if ((drive
= get_info_ptr(i_rdev
)) == NULL
)
2690 if (drive
->driver
!= NULL
)
2691 return DRIVER(drive
)->media_change(drive
);
2695 void ide_fixstring (byte
*s
, const int bytecount
, const int byteswap
)
2697 byte
*p
= s
, *end
= &s
[bytecount
& ~1]; /* bytecount must be even */
2700 /* convert from big-endian to host byte order */
2701 for (p
= end
; p
!= s
;) {
2702 unsigned short *pp
= (unsigned short *) (p
-= 2);
2707 /* strip leading blanks */
2708 while (s
!= end
&& *s
== ' ')
2711 /* compress internal blanks and strip trailing blanks */
2712 while (s
!= end
&& *s
) {
2713 if (*s
++ != ' ' || (s
!= end
&& *s
&& *s
!= ' '))
2717 /* wipe out trailing garbage */
2723 * stridx() returns the offset of c within s,
2724 * or -1 if c is '\0' or not found within s.
2726 static int __init
stridx (const char *s
, char c
)
2728 char *i
= strchr(s
, c
);
2729 return (i
&& c
) ? i
- s
: -1;
2733 * match_parm() does parsing for ide_setup():
2735 * 1. the first char of s must be '='.
2736 * 2. if the remainder matches one of the supplied keywords,
2737 * the index (1 based) of the keyword is negated and returned.
2738 * 3. if the remainder is a series of no more than max_vals numbers
2739 * separated by commas, the numbers are saved in vals[] and a
2740 * count of how many were saved is returned. Base10 is assumed,
2741 * and base16 is allowed when prefixed with "0x".
2742 * 4. otherwise, zero is returned.
2744 static int __init
match_parm (char *s
, const char *keywords
[], int vals
[], int max_vals
)
2746 static const char *decimal
= "0123456789";
2747 static const char *hex
= "0123456789abcdef";
2752 * Try matching against the supplied keywords,
2753 * and return -(index+1) if we match one
2755 if (keywords
!= NULL
) {
2756 for (i
= 0; *keywords
!= NULL
; ++i
) {
2757 if (!strcmp(s
, *keywords
++))
2762 * Look for a series of no more than "max_vals"
2763 * numeric values separated by commas, in base10,
2764 * or base16 when prefixed with "0x".
2765 * Return a count of how many were found.
2767 for (n
= 0; (i
= stridx(decimal
, *s
)) >= 0;) {
2769 while ((i
= stridx(decimal
, *++s
)) >= 0)
2770 vals
[n
] = (vals
[n
] * 10) + i
;
2771 if (*s
== 'x' && !vals
[n
]) {
2772 while ((i
= stridx(hex
, *++s
)) >= 0)
2773 vals
[n
] = (vals
[n
] * 0x10) + i
;
2775 if (++n
== max_vals
)
2777 if (*s
== ',' || *s
== ';')
2783 return 0; /* zero = nothing matched */
2787 * ide_setup() gets called VERY EARLY during initialization,
2788 * to handle kernel "command line" strings beginning with "hdx="
2789 * or "ide". Here is the complete set currently supported:
2791 * "hdx=" is recognized for all "x" from "a" to "h", such as "hdc".
2792 * "idex=" is recognized for all "x" from "0" to "3", such as "ide1".
2794 * "hdx=noprobe" : drive may be present, but do not probe for it
2795 * "hdx=none" : drive is NOT present, ignore cmos and do not probe
2796 * "hdx=nowerr" : ignore the WRERR_STAT bit on this drive
2797 * "hdx=cdrom" : drive is present, and is a cdrom drive
2798 * "hdx=cyl,head,sect" : disk drive is present, with specified geometry
2799 * "hdx=noremap" : do not remap 0->1 even though EZD was detected
2800 * "hdx=autotune" : driver will attempt to tune interface speed
2801 * to the fastest PIO mode supported,
2802 * if possible for this drive only.
2803 * Not fully supported by all chipset types,
2804 * and quite likely to cause trouble with
2805 * older/odd IDE drives.
2807 * "hdx=slow" : insert a huge pause after each access to the data
2808 * port. Should be used only as a last resort.
2810 * "hdx=swapdata" : when the drive is a disk, byte swap all data
2811 * "hdx=bswap" : same as above..........
2812 * "hdxlun=xx" : set the drive last logical unit.
2813 * "hdx=flash" : allows for more than one ata_flash disk to be
2814 * registered. In most cases, only one device
2816 * "hdx=scsi" : the return of the ide-scsi flag, this is useful for
2817 * allowwing ide-floppy, ide-tape, and ide-cdrom|writers
2818 * to use ide-scsi emulation on a device specific option.
2819 * "idebus=xx" : inform IDE driver of VESA/PCI bus speed in MHz,
2820 * where "xx" is between 20 and 66 inclusive,
2821 * used when tuning chipset PIO modes.
2822 * For PCI bus, 25 is correct for a P75 system,
2823 * 30 is correct for P90,P120,P180 systems,
2824 * and 33 is used for P100,P133,P166 systems.
2825 * If in doubt, use idebus=33 for PCI.
2826 * As for VLB, it is safest to not specify it.
2828 * "idex=noprobe" : do not attempt to access/use this interface
2829 * "idex=base" : probe for an interface at the addr specified,
2830 * where "base" is usually 0x1f0 or 0x170
2831 * and "ctl" is assumed to be "base"+0x206
2832 * "idex=base,ctl" : specify both base and ctl
2833 * "idex=base,ctl,irq" : specify base, ctl, and irq number
2834 * "idex=autotune" : driver will attempt to tune interface speed
2835 * to the fastest PIO mode supported,
2836 * for all drives on this interface.
2837 * Not fully supported by all chipset types,
2838 * and quite likely to cause trouble with
2839 * older/odd IDE drives.
2840 * "idex=noautotune" : driver will NOT attempt to tune interface speed
2841 * This is the default for most chipsets,
2842 * except the cmd640.
2843 * "idex=serialize" : do not overlap operations on idex and ide(x^1)
2844 * "idex=four" : four drives on idex and ide(x^1) share same ports
2845 * "idex=reset" : reset interface before first use
2846 * "idex=dma" : enable DMA by default on both drives if possible
2847 * "idex=ata66" : informs the interface that it has an 80c cable
2848 * for chipsets that are ATA-66 capable, but
2849 * the ablity to bit test for detection is
2850 * currently unknown.
2851 * "ide=reverse" : Formerly called to pci sub-system, but now local.
2853 * The following are valid ONLY on ide0, (except dc4030)
2854 * and the defaults for the base,ctl ports must not be altered.
2856 * "ide0=dtc2278" : probe/support DTC2278 interface
2857 * "ide0=ht6560b" : probe/support HT6560B interface
2858 * "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip
2859 * (not for PCI -- automatically detected)
2860 * "ide0=qd6580" : probe/support qd6580 interface
2861 * "ide0=ali14xx" : probe/support ali14xx chipsets (ALI M1439, M1443, M1445)
2862 * "ide0=umc8672" : probe/support umc8672 chipsets
2863 * "idex=dc4030" : probe/support Promise DC4030VL interface
2864 * "ide=doubler" : probe/support IDE doublers on Amiga
2866 int __init
ide_setup (char *s
)
2871 unsigned int hw
, unit
;
2872 const char max_drive
= 'a' + ((MAX_HWIFS
* MAX_DRIVES
) - 1);
2873 const char max_hwif
= '0' + (MAX_HWIFS
- 1);
2876 if (strncmp(s
,"hd",2) == 0 && s
[2] == '=') /* hd= is for hd.c */
2877 return 0; /* driver and not us */
2879 if (strncmp(s
,"ide",3) &&
2880 strncmp(s
,"idebus",6) &&
2881 strncmp(s
,"hd",2)) /* hdx= & hdxlun= */
2884 printk("ide_setup: %s", s
);
2887 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
2888 if (!strcmp(s
, "ide=doubler")) {
2889 extern int ide_doubler
;
2891 printk(" : Enabled support for IDE doublers\n");
2895 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
2897 #ifdef CONFIG_BLK_DEV_IDEPCI
2898 if (!strcmp(s
, "ide=reverse")) {
2899 ide_scan_direction
= 1;
2900 printk(" : Enabled support for IDE inverse scan order.\n");
2903 #endif /* CONFIG_BLK_DEV_IDEPCI */
2906 * Look for drive options: "hdx="
2908 if (s
[0] == 'h' && s
[1] == 'd' && s
[2] >= 'a' && s
[2] <= max_drive
) {
2909 const char *hd_words
[] = {"none", "noprobe", "nowerr", "cdrom",
2910 "serialize", "autotune", "noautotune",
2911 "slow", "swapdata", "bswap", "flash",
2912 "remap", "noremap", "scsi", NULL
};
2914 hw
= unit
/ MAX_DRIVES
;
2915 unit
= unit
% MAX_DRIVES
;
2916 hwif
= &ide_hwifs
[hw
];
2917 drive
= &hwif
->drives
[unit
];
2918 if (strncmp(s
+ 4, "ide-", 4) == 0) {
2919 strncpy(drive
->driver_req
, s
+ 4, 9);
2923 * Look for last lun option: "hdxlun="
2925 if (s
[3] == 'l' && s
[4] == 'u' && s
[5] == 'n') {
2926 if (match_parm(&s
[6], NULL
, vals
, 1) != 1)
2928 if (vals
[0] >= 0 && vals
[0] <= 7) {
2929 drive
->last_lun
= vals
[0];
2930 drive
->forced_lun
= 1;
2932 printk(" -- BAD LAST LUN! Expected value from 0 to 7");
2935 switch (match_parm(&s
[3], hd_words
, vals
, 3)) {
2936 case -1: /* "none" */
2937 drive
->nobios
= 1; /* drop into "noprobe" */
2938 case -2: /* "noprobe" */
2941 case -3: /* "nowerr" */
2942 drive
->bad_wstat
= BAD_R_STAT
;
2945 case -4: /* "cdrom" */
2947 drive
->media
= ide_cdrom
;
2950 case -5: /* "serialize" */
2951 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw
);
2953 case -6: /* "autotune" */
2954 drive
->autotune
= 1;
2956 case -7: /* "noautotune" */
2957 drive
->autotune
= 2;
2959 case -8: /* "slow" */
2962 case -9: /* "swapdata" or "bswap" */
2966 case -11: /* "flash" */
2967 drive
->ata_flash
= 1;
2969 case -12: /* "remap" */
2970 drive
->remap_0_to_1
= 1;
2972 case -13: /* "noremap" */
2973 drive
->remap_0_to_1
= 2;
2975 case -14: /* "scsi" */
2976 #if defined(CONFIG_BLK_DEV_IDESCSI) && defined(CONFIG_SCSI)
2982 #endif /* defined(CONFIG_BLK_DEV_IDESCSI) && defined(CONFIG_SCSI) */
2983 case 3: /* cyl,head,sect */
2984 drive
->media
= ide_disk
;
2985 drive
->cyl
= drive
->bios_cyl
= vals
[0];
2986 drive
->head
= drive
->bios_head
= vals
[1];
2987 drive
->sect
= drive
->bios_sect
= vals
[2];
2989 drive
->forced_geom
= 1;
2997 if (s
[0] != 'i' || s
[1] != 'd' || s
[2] != 'e')
3000 * Look for bus speed option: "idebus="
3002 if (s
[3] == 'b' && s
[4] == 'u' && s
[5] == 's') {
3003 if (match_parm(&s
[6], NULL
, vals
, 1) != 1)
3005 if (vals
[0] >= 20 && vals
[0] <= 66) {
3006 idebus_parameter
= vals
[0];
3008 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
3012 * Look for interface options: "idex="
3014 if (s
[3] >= '0' && s
[3] <= max_hwif
) {
3016 * Be VERY CAREFUL changing this: note hardcoded indexes below
3017 * -8,-9,-10 : are reserved for future idex calls to ease the hardcoding.
3019 const char *ide_words
[] = {
3020 "noprobe", "serialize", "autotune", "noautotune", "reset", "dma", "ata66",
3021 "minus8", "minus9", "minus10",
3022 "four", "qd6580", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", NULL
};
3024 hwif
= &ide_hwifs
[hw
];
3025 i
= match_parm(&s
[4], ide_words
, vals
, 3);
3028 * Cryptic check to ensure chipset not already set for hwif:
3030 if (i
> 0 || i
<= -11) { /* is parameter a chipset name? */
3031 if (hwif
->chipset
!= ide_unknown
)
3032 goto bad_option
; /* chipset already specified */
3033 if (i
<= -11 && i
!= -18 && hw
!= 0)
3034 goto bad_hwif
; /* chipset drivers are for "ide0=" only */
3035 if (i
<= -11 && i
!= -18 && ide_hwifs
[hw
+1].chipset
!= ide_unknown
)
3036 goto bad_option
; /* chipset for 2nd port already specified */
3041 #ifdef CONFIG_BLK_DEV_PDC4030
3042 case -18: /* "dc4030" */
3044 extern void init_pdc4030(void);
3048 #endif /* CONFIG_BLK_DEV_PDC4030 */
3049 #ifdef CONFIG_BLK_DEV_ALI14XX
3050 case -17: /* "ali14xx" */
3052 extern void init_ali14xx (void);
3056 #endif /* CONFIG_BLK_DEV_ALI14XX */
3057 #ifdef CONFIG_BLK_DEV_UMC8672
3058 case -16: /* "umc8672" */
3060 extern void init_umc8672 (void);
3064 #endif /* CONFIG_BLK_DEV_UMC8672 */
3065 #ifdef CONFIG_BLK_DEV_DTC2278
3066 case -15: /* "dtc2278" */
3068 extern void init_dtc2278 (void);
3072 #endif /* CONFIG_BLK_DEV_DTC2278 */
3073 #ifdef CONFIG_BLK_DEV_CMD640
3074 case -14: /* "cmd640_vlb" */
3076 extern int cmd640_vlb
; /* flag for cmd640.c */
3080 #endif /* CONFIG_BLK_DEV_CMD640 */
3081 #ifdef CONFIG_BLK_DEV_HT6560B
3082 case -13: /* "ht6560b" */
3084 extern void init_ht6560b (void);
3088 #endif /* CONFIG_BLK_DEV_HT6560B */
3089 #if CONFIG_BLK_DEV_QD6580
3090 case -12: /* "qd6580" */
3092 extern void init_qd6580 (void);
3096 #endif /* CONFIG_BLK_DEV_QD6580 */
3097 #ifdef CONFIG_BLK_DEV_4DRIVES
3098 case -11: /* "four" drives on one set of ports */
3100 ide_hwif_t
*mate
= &ide_hwifs
[hw
^1];
3101 mate
->drives
[0].select
.all
^= 0x20;
3102 mate
->drives
[1].select
.all
^= 0x20;
3103 hwif
->chipset
= mate
->chipset
= ide_4drives
;
3104 mate
->irq
= hwif
->irq
;
3105 memcpy(mate
->io_ports
, hwif
->io_ports
, sizeof(hwif
->io_ports
));
3108 #endif /* CONFIG_BLK_DEV_4DRIVES */
3109 case -10: /* minus10 */
3110 case -9: /* minus9 */
3111 case -8: /* minus8 */
3113 case -7: /* ata66 */
3114 #ifdef CONFIG_BLK_DEV_IDEPCI
3115 hwif
->udma_four
= 1;
3117 #else /* !CONFIG_BLK_DEV_IDEPCI */
3118 hwif
->udma_four
= 0;
3120 #endif /* CONFIG_BLK_DEV_IDEPCI */
3124 case -5: /* "reset" */
3127 case -4: /* "noautotune" */
3128 hwif
->drives
[0].autotune
= 2;
3129 hwif
->drives
[1].autotune
= 2;
3131 case -3: /* "autotune" */
3132 hwif
->drives
[0].autotune
= 1;
3133 hwif
->drives
[1].autotune
= 1;
3135 case -2: /* "serialize" */
3137 hwif
->mate
= &ide_hwifs
[hw
^1];
3138 hwif
->mate
->mate
= hwif
;
3139 hwif
->serialized
= hwif
->mate
->serialized
= 1;
3142 case -1: /* "noprobe" */
3147 vals
[1] = vals
[0] + 0x206; /* default ctl */
3148 case 2: /* base,ctl */
3149 vals
[2] = 0; /* default irq = probe for it */
3150 case 3: /* base,ctl,irq */
3151 hwif
->hw
.irq
= vals
[2];
3152 ide_init_hwif_ports(&hwif
->hw
, (ide_ioreg_t
) vals
[0], (ide_ioreg_t
) vals
[1], &hwif
->irq
);
3153 memcpy(hwif
->io_ports
, hwif
->hw
.io_ports
, sizeof(hwif
->io_ports
));
3154 hwif
->irq
= vals
[2];
3156 hwif
->chipset
= ide_generic
;
3159 case 0: goto bad_option
;
3161 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
3166 printk(" -- BAD OPTION\n");
3169 printk("-- NOT SUPPORTED ON ide%d", hw
);
3176 * probe_for_hwifs() finds/initializes "known" IDE interfaces
3178 static void __init
probe_for_hwifs (void)
3183 #ifdef CONFIG_BLK_DEV_IDEPCI
3184 ide_scan_pcibus(ide_scan_direction
);
3186 #ifdef CONFIG_BLK_DEV_RZ1000
3188 extern void ide_probe_for_rz100x(void);
3189 ide_probe_for_rz100x();
3191 #endif /* CONFIG_BLK_DEV_RZ1000 */
3192 #endif /* CONFIG_BLK_DEV_IDEPCI */
3194 #endif /* CONFIG_PCI */
3196 #ifdef CONFIG_BLK_DEV_CMD640
3198 extern void ide_probe_for_cmd640x(void);
3199 ide_probe_for_cmd640x();
3201 #endif /* CONFIG_BLK_DEV_CMD640 */
3202 #ifdef CONFIG_BLK_DEV_PDC4030
3204 extern int ide_probe_for_pdc4030(void);
3205 (void) ide_probe_for_pdc4030();
3207 #endif /* CONFIG_BLK_DEV_PDC4030 */
3208 #ifdef CONFIG_BLK_DEV_IDE_PMAC
3210 extern void pmac_ide_probe(void);
3213 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
3214 #ifdef CONFIG_BLK_DEV_IDE_ICSIDE
3216 extern void icside_init(void);
3219 #endif /* CONFIG_BLK_DEV_IDE_ICSIDE */
3220 #ifdef CONFIG_BLK_DEV_IDE_RAPIDE
3222 extern void rapide_init(void);
3225 #endif /* CONFIG_BLK_DEV_IDE_RAPIDE */
3226 #ifdef CONFIG_BLK_DEV_GAYLE
3228 extern void gayle_init(void);
3231 #endif /* CONFIG_BLK_DEV_GAYLE */
3232 #ifdef CONFIG_BLK_DEV_FALCON_IDE
3234 extern void falconide_init(void);
3237 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
3238 #ifdef CONFIG_BLK_DEV_MAC_IDE
3240 extern void macide_init(void);
3243 #endif /* CONFIG_BLK_DEV_MAC_IDE */
3244 #ifdef CONFIG_BLK_DEV_Q40IDE
3246 extern void q40ide_init(void);
3249 #endif /* CONFIG_BLK_DEV_Q40IDE */
3250 #ifdef CONFIG_BLK_DEV_BUDDHA
3252 extern void buddha_init(void);
3255 #endif /* CONFIG_BLK_DEV_BUDDHA */
3256 #if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_ISAPNP)
3258 extern void pnpide_init(int enable
);
3261 #endif /* CONFIG_BLK_DEV_ISAPNP */
3264 void __init
ide_init_builtin_drivers (void)
3267 * Probe for special PCI and other "known" interface chipsets
3271 #ifdef CONFIG_BLK_DEV_IDE
3272 #if defined(__mc68000__) || defined(CONFIG_APUS)
3273 if (ide_hwifs
[0].io_ports
[IDE_DATA_OFFSET
]) {
3274 ide_get_lock(&ide_lock
, NULL
, NULL
); /* for atari only */
3275 disable_irq(ide_hwifs
[0].irq
); /* disable_irq_nosync ?? */
3276 // disable_irq_nosync(ide_hwifs[0].irq);
3278 #endif /* __mc68000__ || CONFIG_APUS */
3280 (void) ideprobe_init();
3282 #if defined(__mc68000__) || defined(CONFIG_APUS)
3283 if (ide_hwifs
[0].io_ports
[IDE_DATA_OFFSET
]) {
3284 enable_irq(ide_hwifs
[0].irq
);
3285 ide_release_lock(&ide_lock
); /* for atari only */
3287 #endif /* __mc68000__ || CONFIG_APUS */
3288 #endif /* CONFIG_BLK_DEV_IDE */
3290 #ifdef CONFIG_PROC_FS
3295 * Attempt to match drivers for the available drives
3297 #ifdef CONFIG_BLK_DEV_IDEDISK
3298 (void) idedisk_init();
3299 #endif /* CONFIG_BLK_DEV_IDEDISK */
3300 #ifdef CONFIG_BLK_DEV_IDECD
3301 (void) ide_cdrom_init();
3302 #endif /* CONFIG_BLK_DEV_IDECD */
3303 #ifdef CONFIG_BLK_DEV_IDETAPE
3304 (void) idetape_init();
3305 #endif /* CONFIG_BLK_DEV_IDETAPE */
3306 #ifdef CONFIG_BLK_DEV_IDEFLOPPY
3307 (void) idefloppy_init();
3308 #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
3309 #ifdef CONFIG_BLK_DEV_IDESCSI
3311 (void) idescsi_init();
3313 #warning ide scsi-emulation selected but no SCSI-subsystem in kernel
3315 #endif /* CONFIG_BLK_DEV_IDESCSI */
3318 static int default_cleanup (ide_drive_t
*drive
)
3320 return ide_unregister_subdriver(drive
);
3323 static ide_startstop_t
default_do_request(ide_drive_t
*drive
, struct request
*rq
, unsigned long block
)
3325 ide_end_request(0, HWGROUP(drive
));
3329 static void default_end_request (byte uptodate
, ide_hwgroup_t
*hwgroup
)
3331 ide_end_request(uptodate
, hwgroup
);
3334 static int default_ioctl (ide_drive_t
*drive
, struct inode
*inode
, struct file
*file
,
3335 unsigned int cmd
, unsigned long arg
)
3340 static int default_open (struct inode
*inode
, struct file
*filp
, ide_drive_t
*drive
)
3346 static void default_release (struct inode
*inode
, struct file
*filp
, ide_drive_t
*drive
)
3350 static int default_check_media_change (ide_drive_t
*drive
)
3355 static void default_pre_reset (ide_drive_t
*drive
)
3359 static unsigned long default_capacity (ide_drive_t
*drive
)
3364 static ide_startstop_t
default_special (ide_drive_t
*drive
)
3366 special_t
*s
= &drive
->special
;
3369 drive
->mult_req
= 0;
3373 static void setup_driver_defaults (ide_drive_t
*drive
)
3375 ide_driver_t
*d
= drive
->driver
;
3377 if (d
->cleanup
== NULL
) d
->cleanup
= default_cleanup
;
3378 if (d
->do_request
== NULL
) d
->do_request
= default_do_request
;
3379 if (d
->end_request
== NULL
) d
->end_request
= default_end_request
;
3380 if (d
->ioctl
== NULL
) d
->ioctl
= default_ioctl
;
3381 if (d
->open
== NULL
) d
->open
= default_open
;
3382 if (d
->release
== NULL
) d
->release
= default_release
;
3383 if (d
->media_change
== NULL
) d
->media_change
= default_check_media_change
;
3384 if (d
->pre_reset
== NULL
) d
->pre_reset
= default_pre_reset
;
3385 if (d
->capacity
== NULL
) d
->capacity
= default_capacity
;
3386 if (d
->special
== NULL
) d
->special
= default_special
;
3389 ide_drive_t
*ide_scan_devices (byte media
, const char *name
, ide_driver_t
*driver
, int n
)
3391 unsigned int unit
, index
, i
;
3393 for (index
= 0, i
= 0; index
< MAX_HWIFS
; ++index
) {
3394 ide_hwif_t
*hwif
= &ide_hwifs
[index
];
3397 for (unit
= 0; unit
< MAX_DRIVES
; ++unit
) {
3398 ide_drive_t
*drive
= &hwif
->drives
[unit
];
3399 char *req
= drive
->driver_req
;
3400 if (*req
&& !strstr(name
, req
))
3402 if (drive
->present
&& drive
->media
== media
&& drive
->driver
== driver
&& ++i
> n
)
3409 int ide_register_subdriver (ide_drive_t
*drive
, ide_driver_t
*driver
, int version
)
3411 unsigned long flags
;
3413 save_flags(flags
); /* all CPUs */
3414 cli(); /* all CPUs */
3415 if (version
!= IDE_SUBDRIVER_VERSION
|| !drive
->present
|| drive
->driver
!= NULL
|| drive
->busy
|| drive
->usage
) {
3416 restore_flags(flags
); /* all CPUs */
3419 drive
->driver
= driver
;
3420 setup_driver_defaults(drive
);
3421 restore_flags(flags
); /* all CPUs */
3422 if (drive
->autotune
!= 2) {
3423 if (driver
->supports_dma
&& HWIF(drive
)->dmaproc
!= NULL
) {
3425 * Force DMAing for the beginning of the check.
3426 * Some chipsets appear to do interesting things,
3427 * if not checked and cleared.
3430 (void) (HWIF(drive
)->dmaproc(ide_dma_off_quietly
, drive
));
3431 (void) (HWIF(drive
)->dmaproc(ide_dma_check
, drive
));
3433 drive
->dsc_overlap
= (drive
->next
!= drive
&& driver
->supports_dsc_overlap
);
3436 drive
->revalidate
= 1;
3437 drive
->suspend_reset
= 0;
3438 #ifdef CONFIG_PROC_FS
3439 ide_add_proc_entries(drive
->proc
, generic_subdriver_entries
, drive
);
3440 ide_add_proc_entries(drive
->proc
, driver
->proc
, drive
);
3445 int ide_unregister_subdriver (ide_drive_t
*drive
)
3447 unsigned long flags
;
3449 save_flags(flags
); /* all CPUs */
3450 cli(); /* all CPUs */
3451 if (drive
->usage
|| drive
->busy
|| drive
->driver
== NULL
|| DRIVER(drive
)->busy
) {
3452 restore_flags(flags
); /* all CPUs */
3455 #if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_ISAPNP) && defined(MODULE)
3457 #endif /* CONFIG_BLK_DEV_ISAPNP */
3458 #ifdef CONFIG_PROC_FS
3459 ide_remove_proc_entries(drive
->proc
, DRIVER(drive
)->proc
);
3460 ide_remove_proc_entries(drive
->proc
, generic_subdriver_entries
);
3462 auto_remove_settings(drive
);
3463 drive
->driver
= NULL
;
3464 restore_flags(flags
); /* all CPUs */
3468 int ide_register_module (ide_module_t
*module
)
3470 ide_module_t
*p
= ide_modules
;
3477 module
->next
= ide_modules
;
3478 ide_modules
= module
;
3479 revalidate_drives();
3483 void ide_unregister_module (ide_module_t
*module
)
3487 for (p
= &ide_modules
; (*p
) && (*p
) != module
; p
= &((*p
)->next
));
3492 struct block_device_operations ide_fops
[] = {{
3494 release
: ide_release
,
3496 check_media_change
: ide_check_media_change
,
3497 revalidate
: ide_revalidate_disk
3500 EXPORT_SYMBOL(ide_hwifs
);
3501 EXPORT_SYMBOL(ide_register_module
);
3502 EXPORT_SYMBOL(ide_unregister_module
);
3503 EXPORT_SYMBOL(ide_spin_wait_hwgroup
);
3508 devfs_handle_t ide_devfs_handle
;
3510 EXPORT_SYMBOL(ide_probe
);
3511 EXPORT_SYMBOL(drive_is_flashcard
);
3512 EXPORT_SYMBOL(ide_timer_expiry
);
3513 EXPORT_SYMBOL(ide_intr
);
3514 EXPORT_SYMBOL(ide_fops
);
3515 EXPORT_SYMBOL(ide_get_queue
);
3516 EXPORT_SYMBOL(ide_add_generic_settings
);
3517 EXPORT_SYMBOL(ide_devfs_handle
);
3518 EXPORT_SYMBOL(do_ide_request
);
3522 EXPORT_SYMBOL(ide_scan_devices
);
3523 EXPORT_SYMBOL(ide_register_subdriver
);
3524 EXPORT_SYMBOL(ide_unregister_subdriver
);
3525 EXPORT_SYMBOL(ide_replace_subdriver
);
3526 EXPORT_SYMBOL(ide_input_data
);
3527 EXPORT_SYMBOL(ide_output_data
);
3528 EXPORT_SYMBOL(atapi_input_bytes
);
3529 EXPORT_SYMBOL(atapi_output_bytes
);
3530 EXPORT_SYMBOL(ide_set_handler
);
3531 EXPORT_SYMBOL(ide_dump_status
);
3532 EXPORT_SYMBOL(ide_error
);
3533 EXPORT_SYMBOL(ide_fixstring
);
3534 EXPORT_SYMBOL(ide_wait_stat
);
3535 EXPORT_SYMBOL(ide_do_reset
);
3536 EXPORT_SYMBOL(ide_init_drive_cmd
);
3537 EXPORT_SYMBOL(ide_do_drive_cmd
);
3538 EXPORT_SYMBOL(ide_end_drive_cmd
);
3539 EXPORT_SYMBOL(ide_end_request
);
3540 EXPORT_SYMBOL(ide_revalidate_disk
);
3541 EXPORT_SYMBOL(ide_cmd
);
3542 EXPORT_SYMBOL(ide_wait_cmd
);
3543 EXPORT_SYMBOL(ide_wait_cmd_task
);
3544 EXPORT_SYMBOL(ide_delay_50ms
);
3545 EXPORT_SYMBOL(ide_stall_queue
);
3546 #ifdef CONFIG_PROC_FS
3547 EXPORT_SYMBOL(ide_add_proc_entries
);
3548 EXPORT_SYMBOL(ide_remove_proc_entries
);
3549 EXPORT_SYMBOL(proc_ide_read_geometry
);
3550 EXPORT_SYMBOL(create_proc_ide_interfaces
);
3552 EXPORT_SYMBOL(ide_add_setting
);
3553 EXPORT_SYMBOL(ide_remove_setting
);
3555 EXPORT_SYMBOL(ide_register_hw
);
3556 EXPORT_SYMBOL(ide_register
);
3557 EXPORT_SYMBOL(ide_unregister
);
3558 EXPORT_SYMBOL(ide_setup_ports
);
3559 EXPORT_SYMBOL(hwif_unregister
);
3560 EXPORT_SYMBOL(get_info_ptr
);
3561 EXPORT_SYMBOL(current_capacity
);
3563 EXPORT_SYMBOL(system_bus_clock
);
3566 * This is gets invoked once during initialization, to set *everything* up
3568 int __init
ide_init (void)
3570 static char banner_printed
;
3573 if (!banner_printed
) {
3574 printk(KERN_INFO
"Uniform Multi-Platform E-IDE driver " REVISION
"\n");
3575 ide_devfs_handle
= devfs_mk_dir (NULL
, "ide", NULL
);
3576 system_bus_speed
= ide_system_bus_speed();
3583 ide_init_builtin_drivers();
3586 for (i
= 0; i
< MAX_HWIFS
; ++i
) {
3587 ide_hwif_t
*hwif
= &ide_hwifs
[i
];
3596 char *options
= NULL
;
3597 MODULE_PARM(options
,"s");
3599 static void __init
parse_options (char *line
)
3603 if (line
== NULL
|| !*line
)
3605 while ((line
= next
) != NULL
) {
3606 if ((next
= strchr(line
,' ')) != NULL
)
3608 if (!ide_setup(line
))
3609 printk ("Unknown option '%s'\n", line
);
3613 int init_module (void)
3615 parse_options(options
);
3619 void cleanup_module (void)
3623 for (index
= 0; index
< MAX_HWIFS
; ++index
) {
3624 ide_unregister(index
);
3625 #if defined(CONFIG_BLK_DEV_IDEDMA) && !defined(CONFIG_DMA_NONPCI)
3626 if (ide_hwifs
[index
].dma_base
)
3627 (void) ide_release_dma(&ide_hwifs
[index
]);
3628 #endif /* (CONFIG_BLK_DEV_IDEDMA) && !(CONFIG_DMA_NONPCI) */
3631 #ifdef CONFIG_PROC_FS
3634 devfs_unregister (ide_devfs_handle
);
3639 __setup("", ide_setup
);