Bug Summary

File:obj-scan-build/../linux/src/drivers/block/ide.c
Location:line 2388, column 1
Description:Address of stack memory associated with local variable 'rq' is still referred to by the global variable 'blk_dev' upon returning to the caller. This will be a dangling reference

Annotated Source Code

1/*
2 * linux/drivers/block/ide.c Version 5.53 Jun 24, 1997
3 *
4 * Copyright (C) 1994-1996 Linus Torvalds & authors (see below)
5 */
6#define _IDE_C /* needed by <linux/blk.h> */
7
8/*
9 * Maintained by Mark Lord <mlord@pobox.com>
10 * and Gadi Oxman <gadio@netvision.net.il>
11 *
12 * This is the multiple IDE interface driver, as evolved from hd.c.
13 * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15).
14 * There can be up to two drives per interface, as per the ATA-2 spec.
15 *
16 * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
17 * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
18 * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64
19 * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64
20 *
21 * It is easy to extend ide.c to handle more than four interfaces:
22 *
23 * Change the MAX_HWIFS constant in ide.h.
24 *
25 * Define some new major numbers (in major.h), and insert them into
26 * the ide_hwif_to_major table in ide.c.
27 *
28 * Fill in the extra values for the new interfaces into the two tables
29 * inside ide.c: default_io_base[] and default_irqs[].
30 *
31 * Create the new request handlers by cloning "do_ide3_request()"
32 * for each new interface, and add them to the switch statement
33 * in the ide_init() function in ide.c.
34 *
35 * Recompile, create the new /dev/ entries, and it will probably work.
36 *
37 * From hd.c:
38 * |
39 * | It traverses the request-list, using interrupts to jump between functions.
40 * | As nearly all functions can be called within interrupts, we may not sleep.
41 * | Special care is recommended. Have Fun!
42 * |
43 * | modified by Drew Eckhardt to check nr of hd's from the CMOS.
44 * |
45 * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
46 * | in the early extended-partition checks and added DM partitions.
47 * |
48 * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
49 * |
50 * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
51 * | and general streamlining by Mark Lord (mlord@pobox.com).
52 *
53 * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
54 *
55 * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg)
56 * Delman Lee (delman@mipg.upenn.edu) ("Mr. atdisk2")
57 * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom)
58 *
59 * This was a rewrite of just about everything from hd.c, though some original
60 * code is still sprinkled about. Think of it as a major evolution, with
61 * inspiration from lots of linux users, esp. hamish@zot.apana.org.au
62 *
63 * Version 1.0 ALPHA initial code, primary i/f working okay
64 * Version 1.3 BETA dual i/f on shared irq tested & working!
65 * Version 1.4 BETA added auto probing for irq(s)
66 * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms,
67 * ...
68 * Version 3.5 correct the bios_cyl field if it's too small
69 * (linux 1.1.76) (to help fdisk with brain-dead BIOSs)
70 * Version 3.6 cosmetic corrections to comments and stuff
71 * (linux 1.1.77) reorganise probing code to make it understandable
72 * added halfway retry to probing for drive identification
73 * added "hdx=noprobe" command line option
74 * allow setting multmode even when identification fails
75 * Version 3.7 move set_geometry=1 from do_identify() to ide_init()
76 * increase DRQ_WAIT to eliminate nuisance messages
77 * wait for DRQ_STAT instead of DATA_READY during probing
78 * (courtesy of Gary Thomas gary@efland.UU.NET)
79 * Version 3.8 fixed byte-swapping for confused Mitsumi cdrom drives
80 * update of ide-cd.c from Scott, allows blocksize=1024
81 * cdrom probe fixes, inspired by jprang@uni-duisburg.de
82 * Version 3.9 don't use LBA if lba_capacity looks funny
83 * correct the drive capacity calculations
84 * fix probing for old Seagates without IDE_ALTSTATUS_REG
85 * fix byte-ordering for some NEC cdrom drives
86 * Version 3.10 disable multiple mode by default; was causing trouble
87 * Version 3.11 fix mis-identification of old WD disks as cdroms
88 * Version 3,12 simplify logic for selecting initial mult_count
89 * (fixes problems with buggy WD drives)
90 * Version 3.13 remove excess "multiple mode disabled" messages
91 * Version 3.14 fix ide_error() handling of BUSY_STAT
92 * fix byte-swapped cdrom strings (again.. arghh!)
93 * ignore INDEX bit when checking the ALTSTATUS reg
94 * Version 3.15 add SINGLE_THREADED flag for use with dual-CMD i/f
95 * ignore WRERR_STAT for non-write operations
96 * added vlb_sync support for DC-2000A & others,
97 * (incl. some Promise chips), courtesy of Frank Gockel
98 * Version 3.16 convert vlb_32bit and vlb_sync into runtime flags
99 * add ioctls to get/set VLB flags (HDIO_[SG]ET_CHIPSET)
100 * rename SINGLE_THREADED to SUPPORT_SERIALIZE,
101 * add boot flag to "serialize" operation for CMD i/f
102 * add optional support for DTC2278 interfaces,
103 * courtesy of andy@cercle.cts.com (Dyan Wile).
104 * add boot flag to enable "dtc2278" probe
105 * add probe to avoid EATA (SCSI) interfaces,
106 * courtesy of neuffer@goofy.zdv.uni-mainz.de.
107 * Version 4.00 tidy up verify_area() calls - heiko@colossus.escape.de
108 * add flag to ignore WRERR_STAT for some drives
109 * courtesy of David.H.West@um.cc.umich.edu
110 * assembly syntax tweak to vlb_sync
111 * removable drive support from scuba@cs.tu-berlin.de
112 * add transparent support for DiskManager-6.0x "Dynamic
113 * Disk Overlay" (DDO), most of this is in genhd.c
114 * eliminate "multiple mode turned off" message at boot
115 * Version 4.10 fix bug in ioctl for "hdparm -c3"
116 * fix DM6:DDO support -- now works with LILO, fdisk, ...
117 * don't treat some naughty WD drives as removable
118 * Version 4.11 updated DM6 support using info provided by OnTrack
119 * Version 5.00 major overhaul, multmode setting fixed, vlb_sync fixed
120 * added support for 3rd/4th/alternative IDE ports
121 * created ide.h; ide-cd.c now compiles separate from ide.c
122 * hopefully fixed infinite "unexpected_intr" from cdroms
123 * zillions of other changes and restructuring
124 * somehow reduced overall memory usage by several kB
125 * probably slowed things down slightly, but worth it
126 * Version 5.01 AT LAST!! Finally understood why "unexpected_intr"
127 * was happening at various times/places: whenever the
128 * ide-interface's ctl_port was used to "mask" the irq,
129 * it also would trigger an edge in the process of masking
130 * which would result in a self-inflicted interrupt!!
131 * (such a stupid way to build a hardware interrupt mask).
132 * This is now fixed (after a year of head-scratching).
133 * Version 5.02 got rid of need for {enable,disable}_irq_list()
134 * Version 5.03 tune-ups, comments, remove "busy wait" from drive resets
135 * removed PROBE_FOR_IRQS option -- no longer needed
136 * OOOPS! fixed "bad access" bug for 2nd drive on an i/f
137 * Version 5.04 changed "ira %d" to "irq %d" in DEBUG message
138 * added more comments, cleaned up unexpected_intr()
139 * OOOPS! fixed null pointer problem in ide reset code
140 * added autodetect for Triton chipset -- no effect yet
141 * Version 5.05 OOOPS! fixed bug in revalidate_disk()
142 * OOOPS! fixed bug in ide_do_request()
143 * added ATAPI reset sequence for cdroms
144 * Version 5.10 added Bus-Mastered DMA support for Triton Chipset
145 * some (mostly) cosmetic changes
146 * Version 5.11 added ht6560b support by malafoss@snakemail.hut.fi
147 * reworked PCI scanning code
148 * added automatic RZ1000 detection/support
149 * added automatic PCI CMD640 detection/support
150 * added option for VLB CMD640 support
151 * tweaked probe to find cdrom on hdb with disks on hda,hdc
152 * Version 5.12 some performance tuning
153 * added message to alert user to bad /dev/hd[cd] entries
154 * OOOPS! fixed bug in atapi reset
155 * driver now forces "serialize" again for all cmd640 chips
156 * noticed REALLY_SLOW_IO had no effect, moved it to ide.c
157 * made do_drive_cmd() into public ide_do_drive_cmd()
158 * Version 5.13 fixed typo ('B'), thanks to houston@boyd.geog.mcgill.ca
159 * fixed ht6560b support
160 * Version 5.13b (sss) fix problem in calling ide_cdrom_setup()
161 * don't bother invalidating nonexistent partitions
162 * Version 5.14 fixes to cmd640 support.. maybe it works now(?)
163 * added & tested full EZ-DRIVE support -- don't use LILO!
164 * don't enable 2nd CMD640 PCI port during init - conflict
165 * Version 5.15 bug fix in init_cmd640_vlb()
166 * bug fix in interrupt sharing code
167 * Version 5.16 ugh.. fix "serialize" support, broken in 5.15
168 * remove "Huh?" from cmd640 code
169 * added qd6580 interface speed select from Colten Edwards
170 * Version 5.17 kludge around bug in BIOS32 on Intel triton motherboards
171 * Version 5.18 new CMD640 code, moved to cmd640.c, #include'd for now
172 * new UMC8672 code, moved to umc8672.c, #include'd for now
173 * disallow turning on DMA when h/w not capable of DMA
174 * Version 5.19 fix potential infinite timeout on resets
175 * extend reset poll into a general purpose polling scheme
176 * add atapi tape drive support from Gadi Oxman
177 * simplify exit from _intr routines -- no IDE_DO_REQUEST
178 * Version 5.20 leave current rq on blkdev request list during I/O
179 * generalized ide_do_drive_cmd() for tape/cdrom driver use
180 * Version 5.21 fix nasty cdrom/tape bug (ide_preempt was messed up)
181 * Version 5.22 fix ide_xlate_1024() to work with/without drive->id
182 * Version 5.23 miscellaneous touch-ups
183 * Version 5.24 fix #if's for SUPPORT_CMD640
184 * Version 5.25 more touch-ups, fix cdrom resets, ...
185 * cmd640.c now configs/compiles separate from ide.c
186 * Version 5.26 keep_settings now maintains the using_dma flag
187 * fix [EZD] remap message to only output at boot time
188 * fix "bad /dev/ entry" message to say hdc, not hdc0
189 * fix ide_xlate_1024() to respect user specified CHS
190 * use CHS from partn table if it looks translated
191 * re-merged flags chipset,vlb_32bit,vlb_sync into io_32bit
192 * keep track of interface chipset type, when known
193 * add generic PIO mode "tuneproc" mechanism
194 * fix cmd640_vlb option
195 * fix ht6560b support (was completely broken)
196 * umc8672.c now configures/compiles separate from ide.c
197 * move dtc2278 support to dtc2278.c
198 * move ht6560b support to ht6560b.c
199 * move qd6580 support to qd6580.c
200 * add ali14xx support in ali14xx.c
201 * Version 5.27 add [no]autotune parameters to help cmd640
202 * move rz1000 support to rz1000.c
203 * Version 5.28 #include "ide_modes.h"
204 * fix disallow_unmask: now per-interface "no_unmask" bit
205 * force io_32bit to be the same on drive pairs of dtc2278
206 * improved IDE tape error handling, and tape DMA support
207 * bugfix in ide_do_drive_cmd() for cdroms + serialize
208 * Version 5.29 fixed non-IDE check for too many physical heads
209 * don't use LBA if capacity is smaller than CHS
210 * Version 5.30 remove real_devices kludge, formerly used by genhd.c
211 * Version 5.32 change "KB" to "kB"
212 * fix serialize (was broken in kernel 1.3.72)
213 * add support for "hdparm -I"
214 * use common code for disk/tape/cdrom IDE_DRIVE_CMDs
215 * add support for Promise DC4030VL caching card
216 * improved serialize support
217 * put partition check back into alphabetical order
218 * add config option for PCMCIA baggage
219 * try to make PCMCIA support safer to use
220 * improve security on ioctls(): all are suser() only
221 * Version 5.33 improve handling of HDIO_DRIVE_CMDs that read data
222 * Version 5.34 fix irq-sharing problem from 5.33
223 * fix cdrom ioctl problem from 5.33
224 * Version 5.35 cosmetic changes
225 * fix cli() problem in try_to_identify()
226 * Version 5.36 fixes to optional PCMCIA support
227 * Version 5.37 don't use DMA when "noautotune" is specified
228 * Version 5.37a (go) fix shared irq probing (was broken in kernel 1.3.72)
229 * call unplug_device() from ide_do_drive_cmd()
230 * Version 5.38 add "hdx=none" option, courtesy of Joel Maslak
231 * mask drive irq after use, if sharing with another hwif
232 * add code to help debug weird cmd640 problems
233 * Version 5.39 fix horrible error in earlier irq sharing "fix"
234 * Version 5.40 fix serialization -- was broken in 5.39
235 * help sharing by masking device irq after probing
236 * Version 5.41 more fixes to irq sharing/serialize detection
237 * disable io_32bit by default on drive reset
238 * Version 5.42 simplify irq-masking after probe
239 * fix NULL pointer deref in save_match()
240 * Version 5.43 Ugh.. unexpected_intr is back: try to exterminate it
241 * Version 5.44 Fix for "irq probe failed" on cmd640
242 * change path on message regarding MAKEDEV.ide
243 * add a throttle to the unexpected_intr() messages
244 * Version 5.45 fix ugly parameter parsing bugs (thanks Derek)
245 * include Gadi's magic fix for cmd640 unexpected_intr
246 * include mc68000 patches from Geert Uytterhoeven
247 * add Gadi's fix for PCMCIA cdroms
248 * Version 5.46 remove the mc68000 #ifdefs for 2.0.x
249 * Version 5.47 fix set_tune race condition
250 * fix bug in earlier PCMCIA cdrom update
251 * Version 5.48 if def'd, invoke CMD640_DUMP_REGS when irq probe fails
252 * lengthen the do_reset1() pulse, for laptops
253 * add idebus=xx parameter for cmd640 and ali chipsets
254 * no_unmask flag now per-drive instead of per-hwif
255 * fix tune_req so that it gets done immediately
256 * fix missing restore_flags() in ide_ioctl
257 * prevent use of io_32bit on cmd640 with no prefetch
258 * Version 5.49 fix minor quirks in probing routines
259 * Version 5.50 allow values as small as 20 for idebus=
260 * Version 5.51 force non io_32bit in drive_cmd_intr()
261 * change delay_10ms() to delay_50ms() to fix problems
262 * Version 5.52 fix incorrect invalidation of removable devices
263 * add "hdx=slow" command line option
264 * Version 5.53 add ATAPI floppy drive support
265 * change default media for type 0 to floppy
266 * add support for Exabyte Nest
267 * add missing set_blocksize() in revalidate_disk()
268 * handle bad status bit sequencing in ide_wait_stat()
269 * support partition table translations with 255 heads
270 * probe all interfaces by default
271 * add probe for the i82371AB chipset
272 * acknowledge media change on removable drives
273 * add work-around for BMI drives
274 * remove "LBA" from boot messages
275 * Version 5.53.1 add UDMA "CRC retry" support
276 * Version 5.53.2 add Promise/33 auto-detection and DMA support
277 * fix MC_ERR handling
278 * fix mis-detection of NEC cdrom as floppy
279 * issue ATAPI reset and re-probe after "no response"
280 *
281 * Some additional driver compile-time options are in ide.h
282 *
283 * To do, in likely order of completion:
284 * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f
285*/
286
287#undef REALLY_SLOW_IO /* most systems can safely undef this */
288
289#include <linux/config.h>
290#include <linux/types.h>
291#include <linux/string.h>
292#include <linux/kernel.h>
293#include <linux/delay.h>
294#include <linux/timer.h>
295#include <linux/mm.h>
296#include <linux/ioport.h>
297#include <linux/interrupt.h>
298#include <linux/major.h>
299#include <linux/blkdev.h>
300#include <linux/errno.h>
301#include <linux/hdreg.h>
302#include <linux/genhd.h>
303#include <linux/malloc.h>
304
305#include <ahci.h>
306
307#include <asm/byteorder.h>
308#include <asm/irq.h>
309#include <asm/segment.h>
310#include <asm/io.h>
311
312#ifdef CONFIG_PCI1
313#include <linux/bios32.h>
314#include <linux/pci.h>
315#endif /* CONFIG_PCI */
316
317#include "ide.h"
318#include "ide_modes.h"
319
320#ifdef CONFIG_BLK_DEV_PROMISE
321#include "promise.h"
322#define IS_PROMISE_DRIVE(0) (HWIF(drive)((ide_hwif_t *)((drive)->hwif))->chipset == ide_promise)
323#else
324#define IS_PROMISE_DRIVE(0) (0) /* auto-NULLs out Promise code */
325#endif /* CONFIG_BLK_DEV_PROMISE */
326
327static const byte ide_hwif_to_major[MAX_HWIFS4] = {IDE0_MAJOR3, IDE1_MAJOR22, IDE2_MAJOR33, IDE3_MAJOR34};
328static const unsigned short default_io_base[MAX_HWIFS4] = {0x1f0, 0x170, 0x1e8, 0x168};
329static const byte default_irqs[MAX_HWIFS4] = {14, 15, 11, 10};
330static int idebus_parameter; /* holds the "idebus=" parameter */
331static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */
332
333/*
334 * This is declared extern in ide.h, for access by other IDE modules:
335 */
336ide_hwif_t ide_hwifs[MAX_HWIFS4]; /* master data repository */
337
338#if (DISK_RECOVERY_TIME0 > 0)
339/*
340 * For really screwy hardware (hey, at least it *can* be used with Linux)
341 * we can enforce a minimum delay time between successive operations.
342 */
343static unsigned long read_timer(void)
344{
345 unsigned long t, flags;
346 int i;
347
348 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
349 cli()__asm__ __volatile__ ("cli": : :"memory");
350 t = jiffies * 11932;
351 outb_p(0, 0x43)((__builtin_constant_p((0x43)) && (0x43) < 256) ? __outbc_p
((0),(0x43)) : __outb_p((0),(0x43)));
352 i = inb_p(0x40)((__builtin_constant_p((0x40)) && (0x40) < 256) ? __inbc_p
(0x40) : __inb_p(0x40));
353 i |= inb(0x40)((__builtin_constant_p((0x40)) && (0x40) < 256) ? __inbc
(0x40) : __inb(0x40)) << 8;
354 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
355 return (t - i);
356}
357
358static void set_recovery_timer (ide_hwif_t *hwif)
359{
360 hwif->last_time = read_timer();
361}
362#define SET_RECOVERY_TIMER(drive) set_recovery_timer (drive)
363
364#else
365
366#define SET_RECOVERY_TIMER(drive)
367
368#endif /* DISK_RECOVERY_TIME */
369
370
371/*
372 * Do not even *think* about calling this!
373 */
374static void init_hwif_data (unsigned int index)
375{
376 byte *p;
377 unsigned int unit;
378 ide_hwif_t *hwif = &ide_hwifs[index];
379
380 /* bulk initialize hwif & drive info with zeros */
381 p = ((byte *) hwif) + sizeof(ide_hwif_t);
382 do {
383 *--p = 0;
384 } while (p > (byte *) hwif);
385
386 /* fill in any non-zero initial values */
387 hwif->index = index;
388 hwif->io_base = default_io_base[index];
389 hwif->ctl_port = hwif->io_base ? hwif->io_base+0x206 : 0x000;
390#ifdef CONFIG_BLK_DEV_HD
391 if (hwif->io_base == HD_DATA0x1f0)
392 hwif->noprobe = 1; /* may be overridden by ide_setup() */
393#endif /* CONFIG_BLK_DEV_HD */
394 hwif->major = ide_hwif_to_major[index];
395 hwif->name[0] = 'i';
396 hwif->name[1] = 'd';
397 hwif->name[2] = 'e';
398 hwif->name[3] = '0' + index;
399#ifdef CONFIG_BLK_DEV_IDETAPE
400 hwif->tape_drive = NULL((void *) 0);
401#endif /* CONFIG_BLK_DEV_IDETAPE */
402 for (unit = 0; unit < MAX_DRIVES2; ++unit) {
403 ide_drive_t *drive = &hwif->drives[unit];
404
405 drive->select.all = (unit<<4)|0xa0;
406 drive->hwif = hwif;
407 drive->ctl = 0x08;
408 drive->ready_stat = READY_STAT0x40;
409 drive->bad_wstat = BAD_W_STAT((0x80 | 0x01) | 0x20);
410 drive->special.b.recalibrate = 1;
411 drive->special.b.set_geometry = 1;
412 drive->name[0] = 'h';
413 drive->name[1] = 'd';
414#ifdef MACH1
415 drive->name[2] = '0' + (index * MAX_DRIVES2) + unit;
416#else
417 drive->name[2] = 'a' + (index * MAX_DRIVES2) + unit;
418#endif
419 }
420}
421
422/*
423 * init_ide_data() sets reasonable default values into all fields
424 * of all instances of the hwifs and drives, but only on the first call.
425 * Subsequent calls have no effect (they don't wipe out anything).
426 *
427 * This routine is normally called at driver initialization time,
428 * but may also be called MUCH earlier during kernel "command-line"
429 * parameter processing. As such, we cannot depend on any other parts
430 * of the kernel (such as memory allocation) to be functioning yet.
431 *
432 * This is too bad, as otherwise we could dynamically allocate the
433 * ide_drive_t structs as needed, rather than always consuming memory
434 * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
435 */
436#define MAGIC_COOKIE0x12345678 0x12345678
437static void init_ide_data (void)
438{
439 unsigned int index;
440 static unsigned long magic_cookie = MAGIC_COOKIE0x12345678;
441
442 if (magic_cookie != MAGIC_COOKIE0x12345678)
443 return; /* already initialized */
444 magic_cookie = 0;
445
446 for (index = 0; index < MAX_HWIFS4; ++index)
447 init_hwif_data(index);
448
449 idebus_parameter = 0;
450 system_bus_speed = 0;
451}
452
453/*
454 * ide_system_bus_speed() returns what we think is the system VESA/PCI
455 * bus speed (in Mhz). This is used for calculating interface PIO timings.
456 * The default is 40 for known PCI systems, 50 otherwise.
457 * The "idebus=xx" parameter can be used to override this value.
458 * The actual value to be used is computed/displayed the first time through.
459 */
460int ide_system_bus_speed (void)
461{
462 if (!system_bus_speed) {
463 if (idebus_parameter)
464 system_bus_speed = idebus_parameter; /* user supplied value */
465#ifdef CONFIG_PCI1
466 else if (pcibios_present())
467 system_bus_speed = 40; /* safe default value for PCI */
468#endif /* CONFIG_PCI */
469 else
470 system_bus_speed = 50; /* safe default value for VESA and PCI */
471 printk("ide: Assuming %dMhz system bus speed for PIO modes; override with idebus=xx\n", system_bus_speed);
472 }
473 return system_bus_speed;
474}
475
476#if SUPPORT_VLB_SYNC1
477/*
478 * Some localbus EIDE interfaces require a special access sequence
479 * when using 32-bit I/O instructions to transfer data. We call this
480 * the "vlb_sync" sequence, which consists of three successive reads
481 * of the sector count register location, with interrupts disabled
482 * to ensure that the reads all happen together.
483 */
484static inlineinline __attribute__((always_inline)) void do_vlb_sync (unsigned short port) {
485 (void) inb (port)((__builtin_constant_p((port)) && (port) < 256) ? __inbc
(port) : __inb(port));
486 (void) inb (port)((__builtin_constant_p((port)) && (port) < 256) ? __inbc
(port) : __inb(port));
487 (void) inb (port)((__builtin_constant_p((port)) && (port) < 256) ? __inbc
(port) : __inb(port));
488}
489#endif /* SUPPORT_VLB_SYNC */
490
491/*
492 * This is used for most PIO data transfers *from* the IDE interface
493 */
494void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
495{
496 unsigned short io_base = HWIF(drive)((ide_hwif_t *)((drive)->hwif))->io_base;
497 unsigned short data_reg = io_base+IDE_DATA_OFFSET(0);
498 byte io_32bit = drive->io_32bit;
499
500 if (io_32bit) {
501#if SUPPORT_VLB_SYNC1
502 if (io_32bit & 2) {
503 cli()__asm__ __volatile__ ("cli": : :"memory");
504 do_vlb_sync(io_base+IDE_NSECTOR_OFFSET(2));
505 insl(data_reg, buffer, wcount);
506 if (drive->unmask)
507 sti()__asm__ __volatile__ ("sti": : :"memory");
508 } else
509#endif /* SUPPORT_VLB_SYNC */
510 insl(data_reg, buffer, wcount);
511 } else {
512#if SUPPORT_SLOW_DATA_PORTS1
513 if (drive->slow) {
514 unsigned short *ptr = (unsigned short *) buffer;
515 while (wcount--) {
516 *ptr++ = inw_p(data_reg)((__builtin_constant_p((data_reg)) && (data_reg) <
256) ? __inwc_p(data_reg) : __inw_p(data_reg));
517 *ptr++ = inw_p(data_reg)((__builtin_constant_p((data_reg)) && (data_reg) <
256) ? __inwc_p(data_reg) : __inw_p(data_reg));
518 }
519 } else
520#endif /* SUPPORT_SLOW_DATA_PORTS */
521 insw(data_reg, buffer, wcount<<1);
522 }
523}
524
525/*
526 * This is used for most PIO data transfers *to* the IDE interface
527 */
528void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
529{
530 unsigned short io_base = HWIF(drive)((ide_hwif_t *)((drive)->hwif))->io_base;
531 unsigned short data_reg = io_base+IDE_DATA_OFFSET(0);
532 byte io_32bit = drive->io_32bit;
533
534 if (io_32bit) {
535#if SUPPORT_VLB_SYNC1
536 if (io_32bit & 2) {
537 cli()__asm__ __volatile__ ("cli": : :"memory");
538 do_vlb_sync(io_base+IDE_NSECTOR_OFFSET(2));
539 outsl(data_reg, buffer, wcount);
540 if (drive->unmask)
541 sti()__asm__ __volatile__ ("sti": : :"memory");
542 } else
543#endif /* SUPPORT_VLB_SYNC */
544 outsl(data_reg, buffer, wcount);
545 } else {
546#if SUPPORT_SLOW_DATA_PORTS1
547 if (drive->slow) {
548 unsigned short *ptr = (unsigned short *) buffer;
549 while (wcount--) {
550 outw_p(*ptr++, data_reg)((__builtin_constant_p((data_reg)) && (data_reg) <
256) ? __outwc_p((*ptr++),(data_reg)) : __outw_p((*ptr++),(data_reg
)));
551 outw_p(*ptr++, data_reg)((__builtin_constant_p((data_reg)) && (data_reg) <
256) ? __outwc_p((*ptr++),(data_reg)) : __outw_p((*ptr++),(data_reg
)));
552 }
553 } else
554#endif /* SUPPORT_SLOW_DATA_PORTS */
555 outsw(data_reg, buffer, wcount<<1);
556 }
557}
558
559/*
560 * The following routines are mainly used by the ATAPI drivers.
561 *
562 * These routines will round up any request for an odd number of bytes,
563 * so if an odd bytecount is specified, be sure that there's at least one
564 * extra byte allocated for the buffer.
565 */
566void atapi_input_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount)
567{
568 ++bytecount;
569 ide_input_data (drive, buffer, bytecount / 4);
570 if ((bytecount & 0x03) >= 2)
571 insw (IDE_DATA_REG(((ide_hwif_t *)((drive)->hwif))->io_base+(0)), ((byte *)buffer) + (bytecount & ~0x03), 1);
572}
573
574void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount)
575{
576 ++bytecount;
577 ide_output_data (drive, buffer, bytecount / 4);
578 if ((bytecount & 0x03) >= 2)
579 outsw (IDE_DATA_REG(((ide_hwif_t *)((drive)->hwif))->io_base+(0)), ((byte *)buffer) + (bytecount & ~0x03), 1);
580}
581
582/*
583 * This should get invoked any time we exit the driver to
584 * wait for an interrupt response from a drive. handler() points
585 * at the appropriate code to handle the next interrupt, and a
586 * timer is started to prevent us from waiting forever in case
587 * something goes wrong (see the timer_expiry() handler later on).
588 */
589void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout)
590{
591 ide_hwgroup_t *hwgroup = HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
));
592#ifdef DEBUG
593 if (hwgroup->handler != NULL((void *) 0)) {
594 printk("%s: ide_set_handler: handler not null; old=%p, new=%p\n",
595 drive->name, hwgroup->handler, handler);
596 }
597#endif
598 hwgroup->handler = handler;
599 hwgroup->timer.expires = jiffies + timeout;
600 add_timer(&(hwgroup->timer));
601}
602
603/*
604 * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
605 * value for this drive (from its reported identification information).
606 *
607 * Returns: 1 if lba_capacity looks sensible
608 * 0 otherwise
609 *
610 * Note: we must not change id->cyls here, otherwise a second call
611 * of this routine might no longer find lba_capacity ok.
612 */
613static int lba_capacity_is_ok (struct hd_driveid *id)
614{
615 unsigned long lba_sects = id->lba_capacity;
616 unsigned long chs_sects = id->cyls * id->heads * id->sectors;
617 unsigned long _10_percent = chs_sects / 10;
618
619 /*
620 * The ATA spec tells large drives to return
621 * C/H/S = 16383/16/63 independent of their size.
622 * Some drives can be jumpered to use 15 heads instead of 16.
623 */
624 if (id->cyls == 16383 && id->sectors == 63 &&
625 (id->heads == 15 || id->heads == 16) &&
626 id->lba_capacity >= 16383*63*id->heads)
627 return 1; /* lba_capacity is our only option */
628
629 /* perform a rough sanity check on lba_sects: within 10% is "okay" */
630 if ((lba_sects - chs_sects) < _10_percent)
631 return 1; /* lba_capacity is good */
632
633 /* some drives have the word order reversed */
634 lba_sects = (lba_sects << 16) | (lba_sects >> 16);
635 if ((lba_sects - chs_sects) < _10_percent) {
636 id->lba_capacity = lba_sects; /* fix it */
637 return 1; /* lba_capacity is (now) good */
638 }
639 return 0; /* lba_capacity value is bad */
640}
641
642/*
643 * current_capacity() returns the capacity (in sectors) of a drive
644 * according to its current geometry/LBA settings.
645 *
646 * It also sets select.b.lba.
647 */
648static unsigned long current_capacity (ide_drive_t *drive)
649{
650 struct hd_driveid *id = drive->id;
651 unsigned long capacity;
652
653 if (!drive->present)
654 return 0;
655#ifdef CONFIG_BLK_DEV_IDEFLOPPY
656 if (drive->media == ide_floppy)
657 return idefloppy_capacity(drive);
658#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
659 if (drive->media != ide_disk)
660 return 0x7fffffff; /* cdrom or tape */
661
662 drive->select.b.lba = 0;
663 /* Determine capacity, and use LBA if the drive properly supports it */
664 capacity = drive->cyl * drive->head * drive->sect;
665 if (id != NULL((void *) 0) && (id->capability & 2) && lba_capacity_is_ok(id)) {
666 if (id->lba_capacity >= capacity) {
667 capacity = id->lba_capacity;
668 drive->select.b.lba = 1;
669 }
670 }
671 return (capacity - drive->sect0);
672}
673
674/*
675 * ide_geninit() is called exactly *once* for each major, from genhd.c,
676 * at the beginning of the initial partition check for the drives.
677 */
678static void ide_geninit (struct gendisk *gd)
679{
680 unsigned int unit;
681 ide_hwif_t *hwif = gd->real_devices;
682
683 for (unit = 0; unit < gd->nr_real; ++unit) {
684 ide_drive_t *drive = &hwif->drives[unit];
685#ifdef CONFIG_BLK_DEV_IDECD1
686 if (drive->present && drive->media == ide_cdrom)
687 ide_cdrom_setup(drive);
688#endif /* CONFIG_BLK_DEV_IDECD */
689#ifdef CONFIG_BLK_DEV_IDETAPE
690 if (drive->present && drive->media == ide_tape)
691 idetape_setup(drive);
692#endif /* CONFIG_BLK_DEV_IDETAPE */
693#ifdef CONFIG_BLK_DEV_IDEFLOPPY
694 if (drive->present && drive->media == ide_floppy)
695 idefloppy_setup(drive);
696#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
697 drive->part[0].nr_sects = current_capacity(drive);
698 if (!drive->present || (drive->media != ide_disk && drive->media != ide_floppy) ||
699 !drive->part[0].nr_sects) {
700 drive->part[0].start_sect = -1; /* skip partition check */
701 }
702 }
703}
704
705/*
706 * init_gendisk() (as opposed to ide_geninit) is called for each major device,
707 * after probing for drives, to allocate partition tables and other data
708 * structures needed for the routines in genhd.c. ide_geninit() gets called
709 * somewhat later, during the partition check.
710 */
711static void init_gendisk (ide_hwif_t *hwif)
712{
713 struct gendisk *gd, **gdp;
714 unsigned int unit, units, minors;
715 int *bs;
716
717 /* figure out maximum drive number on the interface */
718 for (units = MAX_DRIVES2; units > 0; --units) {
719 if (hwif->drives[units-1].present)
720 break;
721 }
722 minors = units * (1<<PARTN_BITS6);
723 gd = kmalloclinux_kmalloc (sizeof(struct gendisk), GFP_KERNEL0x03);
724 gd->sizes = kmalloclinux_kmalloc (minors * sizeof(int), GFP_KERNEL0x03);
725 gd->part = kmalloclinux_kmalloc (minors * sizeof(struct hd_struct), GFP_KERNEL0x03);
726 bs = kmalloclinux_kmalloc (minors*sizeof(int), GFP_KERNEL0x03);
727
728 memset(gd->part, 0, minors * sizeof(struct hd_struct))(__builtin_constant_p(0) ? (__builtin_constant_p((minors * sizeof
(struct hd_struct))) ? __constant_c_and_count_memset(((gd->
part)),((0x01010101UL*(unsigned char)(0))),((minors * sizeof(
struct hd_struct)))) : __constant_c_memset(((gd->part)),((
0x01010101UL*(unsigned char)(0))),((minors * sizeof(struct hd_struct
))))) : (__builtin_constant_p((minors * sizeof(struct hd_struct
))) ? __memset_generic((((gd->part))),(((0))),(((minors * sizeof
(struct hd_struct))))) : __memset_generic(((gd->part)),((0
)),((minors * sizeof(struct hd_struct))))));
729
730 /* cdroms and msdos f/s are examples of non-1024 blocksizes */
731 blksize_size[hwif->major] = bs;
732 for (unit = 0; unit < minors; ++unit)
733 *bs++ = BLOCK_SIZE1024;
734
735 for (unit = 0; unit < units; ++unit)
736 hwif->drives[unit].part = &gd->part[unit << PARTN_BITS6];
737
738 gd->major = hwif->major; /* our major device number */
739 gd->major_name = IDE_MAJOR_NAME"ide"; /* treated special in genhd.c */
740 gd->minor_shift = PARTN_BITS6; /* num bits for partitions */
741 gd->max_p = 1<<PARTN_BITS6; /* 1 + max partitions / drive */
742 gd->max_nr = units; /* max num real drives */
743 gd->nr_real = units; /* current num real drives */
744 gd->init = ide_geninit; /* initialization function */
745 gd->real_devices= hwif; /* ptr to internal data */
746 gd->next = NULL((void *) 0); /* linked list of major devs */
747
748 for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next)) ;
749 hwif->gd = *gdp = gd; /* link onto tail of list */
750}
751
752static void do_reset1 (ide_drive_t *, int); /* needed below */
753
754#ifdef CONFIG_BLK_DEV_IDEATAPI1
755/*
756 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
757 * during an atapi drive reset operation. If the drive has not yet responded,
758 * and we have not yet hit our maximum waiting time, then the timer is restarted
759 * for another 50ms.
760 */
761static void atapi_reset_pollfunc (ide_drive_t *drive)
762{
763 ide_hwgroup_t *hwgroup = HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
));
764 byte stat;
765
766 OUT_BYTE (drive->select.all, IDE_SELECT_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(6))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(6)))) < 256) ? __outbc_p(((drive->select
.all)),(((((ide_hwif_t *)((drive)->hwif))->io_base+(6))
))) : __outb_p(((drive->select.all)),(((((ide_hwif_t *)((drive
)->hwif))->io_base+(6))))));
767 udelay (10)(__builtin_constant_p(10) ? __const_udelay((10) * 0x10c6ul) :
__udelay(10));
768
769 if (OK_STAT(stat=GET_STAT(), 0, BUSY_STAT)(((stat=(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive
)->hwif))->io_base+(7)))) && ((((ide_hwif_t *)(
(drive)->hwif))->io_base+(7))) < 256) ? __inbc_p((((
ide_hwif_t *)((drive)->hwif))->io_base+(7))) : __inb_p(
(((ide_hwif_t *)((drive)->hwif))->io_base+(7)))))&(
(0)|(0x80)))==(0))) {
770 printk("%s: ATAPI reset complete\n", drive->name);
771 } else {
772 if (jiffies < hwgroup->poll_timeout) {
773 ide_set_handler (drive, &atapi_reset_pollfunc, HZ100/20);
774 return; /* continue polling */
775 }
776 hwgroup->poll_timeout = 0; /* end of polling */
777 printk("%s: ATAPI reset timed-out, status=0x%02x\n", drive->name, stat);
778 do_reset1 (drive, 1); /* do it the old fashioned way */
779 return;
780 }
781 hwgroup->poll_timeout = 0; /* done polling */
782}
783#endif /* CONFIG_BLK_DEV_IDEATAPI */
784
785/*
786 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
787 * during an ide reset operation. If the drives have not yet responded,
788 * and we have not yet hit our maximum waiting time, then the timer is restarted
789 * for another 50ms.
790 */
791static void reset_pollfunc (ide_drive_t *drive)
792{
793 ide_hwgroup_t *hwgroup = HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
));
794 ide_hwif_t *hwif = HWIF(drive)((ide_hwif_t *)((drive)->hwif));
795 byte tmp;
796
797 if (!OK_STAT(tmp=GET_STAT(), 0, BUSY_STAT)(((tmp=(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)
->hwif))->io_base+(7)))) && ((((ide_hwif_t *)((
drive)->hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))))&((0)|(0x80)))==
(0))) {
798 if (jiffies < hwgroup->poll_timeout) {
799 ide_set_handler (drive, &reset_pollfunc, HZ100/20);
800 return; /* continue polling */
801 }
802 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
803 } else {
804 printk("%s: reset: ", hwif->name);
805 if ((tmp = GET_ERR()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(1)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(1))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(1))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(1))))) == 1)
806 printk("success\n");
807 else {
808#if FANCY_STATUS_DUMPS1
809 printk("master: ");
810 switch (tmp & 0x7f) {
811 case 1: printk("passed");
812 break;
813 case 2: printk("formatter device error");
814 break;
815 case 3: printk("sector buffer error");
816 break;
817 case 4: printk("ECC circuitry error");
818 break;
819 case 5: printk("controlling MPU error");
820 break;
821 default:printk("error (0x%02x?)", tmp);
822 }
823 if (tmp & 0x80)
824 printk("; slave: failed");
825 printk("\n");
826#else
827 printk("failed\n");
828#endif /* FANCY_STATUS_DUMPS */
829 }
830 }
831 hwgroup->poll_timeout = 0; /* done polling */
832}
833
834/*
835 * do_reset1() attempts to recover a confused drive by resetting it.
836 * Unfortunately, resetting a disk drive actually resets all devices on
837 * the same interface, so it can really be thought of as resetting the
838 * interface rather than resetting the drive.
839 *
840 * ATAPI devices have their own reset mechanism which allows them to be
841 * individually reset without clobbering other devices on the same interface.
842 *
843 * Unfortunately, the IDE interface does not generate an interrupt to let
844 * us know when the reset operation has finished, so we must poll for this.
845 * Equally poor, though, is the fact that this may a very long time to complete,
846 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
847 * we set a timer to poll at 50ms intervals.
848 */
849static void do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
850{
851 unsigned int unit;
852 unsigned long flags;
853 ide_hwif_t *hwif = HWIF(drive)((ide_hwif_t *)((drive)->hwif));
854 ide_hwgroup_t *hwgroup = HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
));
855
856 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
857 cli()__asm__ __volatile__ ("cli": : :"memory"); /* Why ? */
858
859#ifdef CONFIG_BLK_DEV_IDEATAPI1
860 /* For an ATAPI device, first try an ATAPI SRST. */
861 if (drive->media != ide_disk) {
862 if (!do_not_try_atapi) {
863 if (!drive->keep_settings) {
864 drive->unmask = 0;
865 drive->io_32bit = 0;
866 }
867 OUT_BYTE (drive->select.all, IDE_SELECT_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(6))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(6)))) < 256) ? __outbc_p(((drive->select
.all)),(((((ide_hwif_t *)((drive)->hwif))->io_base+(6))
))) : __outb_p(((drive->select.all)),(((((ide_hwif_t *)((drive
)->hwif))->io_base+(6))))));
868 udelay (20)(__builtin_constant_p(20) ? __const_udelay((20) * 0x10c6ul) :
__udelay(20));
869 OUT_BYTE (WIN_SRST, IDE_COMMAND_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(7))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) < 256) ? __outbc_p(((0x08)),(((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))))) : __outb_p(((0x08)
),(((((ide_hwif_t *)((drive)->hwif))->io_base+(7))))));
870 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE(30*100);
871 ide_set_handler (drive, &atapi_reset_pollfunc, HZ100/20);
872 restore_flags (flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
873 return;
874 }
875 }
876#endif /* CONFIG_BLK_DEV_IDEATAPI */
877
878 /*
879 * First, reset any device state data we were maintaining
880 * for any of the drives on this interface.
881 */
882 for (unit = 0; unit < MAX_DRIVES2; ++unit) {
883 ide_drive_t *rdrive = &hwif->drives[unit];
884#ifdef CONFIG_BLK_DEV_IDETAPE
885 if (rdrive->media == ide_tape)
886 rdrive->tape.reset_issued = 1;
887#endif /* CONFIG_BLK_DEV_IDETAPE */
888 rdrive->special.all = 0;
889 rdrive->special.b.set_geometry = 1;
890 rdrive->special.b.recalibrate = 1;
891 if (OK_TO_RESET_CONTROLLER1)
892 rdrive->mult_count = 0;
893 if (!rdrive->keep_settings) {
894 rdrive->mult_req = 0;
895 rdrive->unmask = 0;
896 rdrive->io_32bit = 0;
897 if (rdrive->using_dma) {
898 rdrive->using_dma = 0;
899 printk("%s: disabled DMA\n", rdrive->name);
900 }
901 }
902 if (rdrive->mult_req != rdrive->mult_count)
903 rdrive->special.b.set_multmode = 1;
904 }
905
906#if OK_TO_RESET_CONTROLLER1
907 /*
908 * Note that we also set nIEN while resetting the device,
909 * to mask unwanted interrupts from the interface during the reset.
910 * However, due to the design of PC hardware, this will cause an
911 * immediate interrupt due to the edge transition it produces.
912 * This single interrupt gives us a "fast poll" for drives that
913 * recover from reset very quickly, saving us the first 50ms wait time.
914 */
915 OUT_BYTE(drive->ctl|6,IDE_CONTROL_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
ctl_port)))) && (((((ide_hwif_t *)((drive)->hwif))
->ctl_port))) < 256) ? __outbc_p(((drive->ctl|6)),((
(((ide_hwif_t *)((drive)->hwif))->ctl_port)))) : __outb_p
(((drive->ctl|6)),(((((ide_hwif_t *)((drive)->hwif))->
ctl_port))))); /* set SRST and nIEN */
916 udelay(10)(__builtin_constant_p(10) ? __const_udelay((10) * 0x10c6ul) :
__udelay(10)); /* more than enough time */
917 OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
ctl_port)))) && (((((ide_hwif_t *)((drive)->hwif))
->ctl_port))) < 256) ? __outbc_p(((drive->ctl|2)),((
(((ide_hwif_t *)((drive)->hwif))->ctl_port)))) : __outb_p
(((drive->ctl|2)),(((((ide_hwif_t *)((drive)->hwif))->
ctl_port))))); /* clear SRST, leave nIEN */
918 udelay(10)(__builtin_constant_p(10) ? __const_udelay((10) * 0x10c6ul) :
__udelay(10)); /* more than enough time */
919 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE(30*100);
920 ide_set_handler (drive, &reset_pollfunc, HZ100/20);
921#endif /* OK_TO_RESET_CONTROLLER */
922
923 restore_flags (flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
924}
925
926/*
927 * ide_do_reset() is the entry point to the drive/interface reset code.
928 */
929void ide_do_reset (ide_drive_t *drive)
930{
931 do_reset1 (drive, 0);
932#ifdef CONFIG_BLK_DEV_IDETAPE
933 if (drive->media == ide_tape)
934 drive->tape.reset_issued=1;
935#endif /* CONFIG_BLK_DEV_IDETAPE */
936}
937
938/*
939 * Clean up after success/failure of an explicit drive cmd
940 */
941void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err)
942{
943 unsigned long flags;
944 struct request *rq = HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->rq;
945
946 if (rq->cmd == IDE_DRIVE_CMD99) {
947 byte *args = (byte *) rq->buffer;
948 rq->errors = !OK_STAT(stat,READY_STAT,BAD_STAT)(((stat)&((0x40)|(((0x80 | 0x01) | 0x08))))==(0x40));
949 if (args) {
950 args[0] = stat;
951 args[1] = err;
952 args[2] = IN_BYTE(IDE_NSECTOR_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(2)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(2))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(2))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(2))));
953 }
954 }
955 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
956 cli()__asm__ __volatile__ ("cli": : :"memory");
957 blk_dev[MAJOR(rq->rq_dev)((rq->rq_dev) >> 8)].current_request = rq->next;
958 HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->rq = NULL((void *) 0);
959 rq->rq_status = RQ_INACTIVE(-1);
960 if (rq->sem != NULL((void *) 0))
961 up(rq->sem);
962 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
963}
964
965/*
966 * Error reporting, in human readable form (luxurious, but a memory hog).
967 */
968byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat)
969{
970 unsigned long flags;
971 byte err = 0;
972
973 save_flags (flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
974 sti()__asm__ __volatile__ ("sti": : :"memory");
975 printk("%s: %s: status=0x%02x", drive->name, msg, stat);
976#if FANCY_STATUS_DUMPS1
977 if (drive->media == ide_disk) {
978 printk(" { ");
979 if (stat & BUSY_STAT0x80)
980 printk("Busy ");
981 else {
982 if (stat & READY_STAT0x40) printk("DriveReady ");
983 if (stat & WRERR_STAT0x20) printk("DeviceFault ");
984 if (stat & SEEK_STAT0x10) printk("SeekComplete ");
985 if (stat & DRQ_STAT0x08) printk("DataRequest ");
986 if (stat & ECC_STAT0x04) printk("CorrectedError ");
987 if (stat & INDEX_STAT0x02) printk("Index ");
988 if (stat & ERR_STAT0x01) printk("Error ");
989 }
990 printk("}");
991 }
992#endif /* FANCY_STATUS_DUMPS */
993 printk("\n");
994 if ((stat & (BUSY_STAT0x80|ERR_STAT0x01)) == ERR_STAT0x01) {
995 err = GET_ERR()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(1)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(1))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(1))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(1))));
996 printk("%s: %s: error=0x%02x", drive->name, msg, err);
997#if FANCY_STATUS_DUMPS1
998 if (drive->media == ide_disk) {
999 printk(" { ");
1000 if (err & ICRC_ERR0x80) printk((err & ABRT_ERR0x04) ? "BadCRC " : "BadSector ");
1001 if (err & ECC_ERR0x40) printk("UncorrectableError ");
1002 if (err & ID_ERR0x10) printk("SectorIdNotFound ");
1003 if (err & ABRT_ERR0x04) printk("DriveStatusError ");
1004 if (err & TRK0_ERR0x02) printk("TrackZeroNotFound ");
1005 if (err & MARK_ERR0x01) printk("AddrMarkNotFound ");
1006 printk("}");
1007 if (err & (BBD_ERR0x80|ECC_ERR0x40|ID_ERR0x10|MARK_ERR0x01)) {
1008 byte cur = IN_BYTE(IDE_SELECT_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(6)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(6))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(6))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(6))));
1009 if (cur & 0x40) { /* using LBA? */
1010 printk(", LBAsect=%ld", (unsigned long)
1011 ((cur&0xf)<<24)
1012 |(IN_BYTE(IDE_HCYL_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(5)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(5))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(5))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(5))))<<16)
1013 |(IN_BYTE(IDE_LCYL_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(4)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(4))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(4))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(4))))<<8)
1014 | IN_BYTE(IDE_SECTOR_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(3)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(3))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(3))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(3)))));
1015 } else {
1016 printk(", CHS=%d/%d/%d",
1017 (IN_BYTE(IDE_HCYL_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(5)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(5))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(5))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(5))))<<8) +
1018 IN_BYTE(IDE_LCYL_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(4)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(4))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(4))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(4)))),
1019 cur & 0xf,
1020 IN_BYTE(IDE_SECTOR_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(3)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(3))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(3))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(3)))));
1021 }
1022 if (HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->rq)
1023 printk(", sector=%ld", HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->rq->sector);
1024 }
1025 }
1026#endif /* FANCY_STATUS_DUMPS */
1027 printk("\n");
1028 }
1029 restore_flags (flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
1030 return err;
1031}
1032
1033/*
1034 * try_to_flush_leftover_data() is invoked in response to a drive
1035 * unexpectedly having its DRQ_STAT bit set. As an alternative to
1036 * resetting the drive, this routine tries to clear the condition
1037 * by read a sector's worth of data from the drive. Of course,
1038 * this may not help if the drive is *waiting* for data from *us*.
1039 */
1040static void try_to_flush_leftover_data (ide_drive_t *drive)
1041{
1042 int i = (drive->mult_count ? drive->mult_count : 1) * SECTOR_WORDS(512 / 4);
1043
1044 while (i > 0) {
1045 unsigned long buffer[16];
1046 unsigned int wcount = (i > 16) ? 16 : i;
1047 i -= wcount;
1048 ide_input_data (drive, buffer, wcount);
1049 }
1050}
1051
1052/*
1053 * ide_error() takes action based on the error returned by the controller.
1054 */
1055void ide_error (ide_drive_t *drive, const char *msg, byte stat)
1056{
1057 struct request *rq;
1058 byte err;
1059
1060 err = ide_dump_status(drive, msg, stat);
1061 if ((rq = HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->rq) == NULL((void *) 0) || drive == NULL((void *) 0))
1062 return;
1063 /* retry only "normal" I/O: */
1064 if (rq->cmd == IDE_DRIVE_CMD99) {
1065 rq->errors = 1;
1066 ide_end_drive_cmd(drive, stat, err);
1067 return;
1068 }
1069 if (stat & BUSY_STAT0x80) { /* other bits are useless when BUSY */
1070 rq->errors |= ERROR_RESET3;
1071 } else {
1072 if (drive->media == ide_disk && (stat & ERR_STAT0x01)) {
1073 /* err has different meaning on cdrom and tape */
1074 if (err == ABRT_ERR0x04) {
1075 if (drive->select.b.lba && IN_BYTE(IDE_COMMAND_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))) == WIN_SPECIFY0x91)
1076 return; /* some newer drives don't support WIN_SPECIFY */
1077 } else if ((err & (ABRT_ERR0x04 | ICRC_ERR0x80)) == (ABRT_ERR0x04 | ICRC_ERR0x80))
1078 ; /* UDMA crc error -- just retry the operation */
1079 else if (err & (BBD_ERR0x80 | ECC_ERR0x40)) /* retries won't help these */
1080 rq->errors = ERROR_MAX8;
1081 else if (err & TRK0_ERR0x02) /* help it find track zero */
1082 rq->errors |= ERROR_RECAL1;
1083 else if (err & MC_ERR0x20)
1084 drive->special.b.mc = 1;
1085 }
1086 if ((stat & DRQ_STAT0x08) && rq->cmd != WRITE1)
1087 try_to_flush_leftover_data(drive);
1088 }
1089 if (GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))) & (BUSY_STAT0x80|DRQ_STAT0x08))
1090 rq->errors |= ERROR_RESET3; /* Mmmm.. timing problem */
1091
1092 if (rq->errors >= ERROR_MAX8) {
1093#ifdef CONFIG_BLK_DEV_IDETAPE
1094 if (drive->media == ide_tape) {
1095 rq->errors = 0;
1096 idetape_end_request(0, HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
)));
1097 } else
1098#endif /* CONFIG_BLK_DEV_IDETAPE */
1099#ifdef CONFIG_BLK_DEV_IDEFLOPPY
1100 if (drive->media == ide_floppy) {
1101 rq->errors = 0;
1102 idefloppy_end_request(0, HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
)));
1103 } else
1104#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
1105#ifdef CONFIG_BLK_DEV_IDESCSI
1106 if (drive->media == ide_scsi) {
1107 rq->errors = 0;
1108 idescsi_end_request(0, HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
)));
1109 } else
1110#endif /* CONFIG_BLK_DEV_IDESCSI */
1111 ide_end_request(0, HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
)));
1112 }
1113 else {
1114 if ((rq->errors & ERROR_RESET3) == ERROR_RESET3) {
1115 ++rq->errors;
1116 ide_do_reset(drive);
1117 return;
1118 } else if ((rq->errors & ERROR_RECAL1) == ERROR_RECAL1)
1119 drive->special.b.recalibrate = 1;
1120 ++rq->errors;
1121 }
1122}
1123
1124/*
1125 * read_intr() is the handler for disk read/multread interrupts
1126 */
1127static void read_intr (ide_drive_t *drive)
1128{
1129 byte stat;
1130 int i;
1131 unsigned int msect, nsect;
1132 struct request *rq;
1133
1134 if (!OK_STAT(stat=GET_STAT(),DATA_READY,BAD_R_STAT)(((stat=(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive
)->hwif))->io_base+(7)))) && ((((ide_hwif_t *)(
(drive)->hwif))->io_base+(7))) < 256) ? __inbc_p((((
ide_hwif_t *)((drive)->hwif))->io_base+(7))) : __inb_p(
(((ide_hwif_t *)((drive)->hwif))->io_base+(7)))))&(
((0x08))|((0x80 | 0x01))))==((0x08)))) {
1135 ide_error(drive, "read_intr", stat);
1136 return;
1137 }
1138 msect = drive->mult_count;
1139read_next:
1140 rq = HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->rq;
1141 if (msect) {
1142 if ((nsect = rq->current_nr_sectors) > msect)
1143 nsect = msect;
1144 msect -= nsect;
1145 } else
1146 nsect = 1;
1147 i = rq->nr_sectors - nsect;
1148 if (i > 0 && !msect)
1149 ide_set_handler (drive, &read_intr, WAIT_CMD(10*100));
1150 ide_input_data(drive, rq->buffer, nsect * SECTOR_WORDS(512 / 4));
1151#ifdef DEBUG
1152 printk("%s: read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n",
1153 drive->name, rq->sector, rq->sector+nsect-1,
1154 (unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect);
1155#endif
1156 rq->sector += nsect;
1157 rq->buffer += nsect<<9;
1158 rq->errors = 0;
1159 rq->nr_sectors = i;
1160 if ((rq->current_nr_sectors -= nsect) <= 0)
1161 ide_end_request(1, HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
)));
1162 if (i > 0 && msect)
1163 goto read_next;
1164}
1165
1166/*
1167 * write_intr() is the handler for disk write interrupts
1168 */
1169static void write_intr (ide_drive_t *drive)
1170{
1171 byte stat;
1172 int i;
1173 ide_hwgroup_t *hwgroup = HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
));
1174 struct request *rq = hwgroup->rq;
1175
1176 if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)(((stat=(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive
)->hwif))->io_base+(7)))) && ((((ide_hwif_t *)(
(drive)->hwif))->io_base+(7))) < 256) ? __inbc_p((((
ide_hwif_t *)((drive)->hwif))->io_base+(7))) : __inb_p(
(((ide_hwif_t *)((drive)->hwif))->io_base+(7)))))&(
((0x40 | 0x10))|(drive->bad_wstat)))==((0x40 | 0x10)))) {
1177#ifdef DEBUG
1178 printk("%s: write: sector %ld, buffer=0x%08lx, remaining=%ld\n",
1179 drive->name, rq->sector, (unsigned long) rq->buffer,
1180 rq->nr_sectors-1);
1181#endif
1182 if ((rq->nr_sectors == 1) ^ ((stat & DRQ_STAT0x08) != 0)) {
1183 rq->sector++;
1184 rq->buffer += 512;
1185 rq->errors = 0;
1186 i = --rq->nr_sectors;
1187 --rq->current_nr_sectors;
1188 if (rq->current_nr_sectors <= 0)
1189 ide_end_request(1, hwgroup);
1190 if (i > 0) {
1191 ide_set_handler (drive, &write_intr, WAIT_CMD(10*100));
1192 ide_output_data (drive, rq->buffer, SECTOR_WORDS(512 / 4));
1193 }
1194 return;
1195 }
1196 }
1197 ide_error(drive, "write_intr", stat);
1198}
1199
1200/*
1201 * ide_multwrite() transfers a block of up to mcount sectors of data
1202 * to a drive as part of a disk multiple-sector write operation.
1203 */
1204void ide_multwrite (ide_drive_t *drive, unsigned int mcount)
1205{
1206 struct request *rq = &HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->wrq;
1207
1208 do {
1209 unsigned int nsect = rq->current_nr_sectors;
1210 if (nsect > mcount)
1211 nsect = mcount;
1212 mcount -= nsect;
1213
1214 ide_output_data(drive, rq->buffer, nsect<<7);
1215#ifdef DEBUG
1216 printk("%s: multwrite: sector %ld, buffer=0x%08lx, count=%d, remaining=%ld\n",
1217 drive->name, rq->sector, (unsigned long) rq->buffer,
1218 nsect, rq->nr_sectors - nsect);
1219#endif
1220 if ((rq->nr_sectors -= nsect) <= 0)
1221 break;
1222 if ((rq->current_nr_sectors -= nsect) == 0) {
1223 if ((rq->bh = rq->bh->b_reqnext) != NULL((void *) 0)) {
1224 rq->current_nr_sectors = rq->bh->b_size>>9;
1225 rq->buffer = rq->bh->b_data;
1226 } else {
1227 panic("%s: buffer list corrupted\n", drive->name);
1228 break;
1229 }
1230 } else {
1231 rq->buffer += nsect << 9;
1232 }
1233 } while (mcount);
1234}
1235
1236/*
1237 * multwrite_intr() is the handler for disk multwrite interrupts
1238 */
1239static void multwrite_intr (ide_drive_t *drive)
1240{
1241 byte stat;
1242 int i;
1243 ide_hwgroup_t *hwgroup = HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
));
1244 struct request *rq = &hwgroup->wrq;
1245
1246 if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)(((stat=(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive
)->hwif))->io_base+(7)))) && ((((ide_hwif_t *)(
(drive)->hwif))->io_base+(7))) < 256) ? __inbc_p((((
ide_hwif_t *)((drive)->hwif))->io_base+(7))) : __inb_p(
(((ide_hwif_t *)((drive)->hwif))->io_base+(7)))))&(
((0x40 | 0x10))|(drive->bad_wstat)))==((0x40 | 0x10)))) {
1247 if (stat & DRQ_STAT0x08) {
1248 if (rq->nr_sectors) {
1249 ide_set_handler (drive, &multwrite_intr, WAIT_CMD(10*100));
1250 ide_multwrite(drive, drive->mult_count);
1251 return;
1252 }
1253 } else {
1254 if (!rq->nr_sectors) { /* all done? */
1255 rq = hwgroup->rq;
1256 for (i = rq->nr_sectors; i > 0;){
1257 i -= rq->current_nr_sectors;
1258 ide_end_request(1, hwgroup);
1259 }
1260 return;
1261 }
1262 }
1263 }
1264 ide_error(drive, "multwrite_intr", stat);
1265}
1266
1267/*
1268 * Issue a simple drive command
1269 * The drive must be selected beforehand.
1270 */
1271static void ide_cmd(ide_drive_t *drive, byte cmd, byte nsect, ide_handler_t *handler)
1272{
1273 ide_set_handler (drive, handler, WAIT_CMD(10*100));
1274 OUT_BYTE(drive->ctl,IDE_CONTROL_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
ctl_port)))) && (((((ide_hwif_t *)((drive)->hwif))
->ctl_port))) < 256) ? __outbc_p(((drive->ctl)),((((
(ide_hwif_t *)((drive)->hwif))->ctl_port)))) : __outb_p
(((drive->ctl)),(((((ide_hwif_t *)((drive)->hwif))->
ctl_port)))));
1275 OUT_BYTE(nsect,IDE_NSECTOR_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(2))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(2)))) < 256) ? __outbc_p(((nsect)),(((((ide_hwif_t
*)((drive)->hwif))->io_base+(2))))) : __outb_p(((nsect
)),(((((ide_hwif_t *)((drive)->hwif))->io_base+(2))))));
1276 OUT_BYTE(cmd,IDE_COMMAND_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(7))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) < 256) ? __outbc_p(((cmd)),(((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))))) : __outb_p(((cmd))
,(((((ide_hwif_t *)((drive)->hwif))->io_base+(7))))));
1277}
1278
1279/*
1280 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
1281 */
1282static void set_multmode_intr (ide_drive_t *drive)
1283{
1284 byte stat = GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))));
1285
1286 sti()__asm__ __volatile__ ("sti": : :"memory");
1287 if (OK_STAT(stat,READY_STAT,BAD_STAT)(((stat)&((0x40)|(((0x80 | 0x01) | 0x08))))==(0x40))) {
1288 drive->mult_count = drive->mult_req;
1289 } else {
1290 drive->mult_req = drive->mult_count = 0;
1291 drive->special.b.recalibrate = 1;
1292 (void) ide_dump_status(drive, "set_multmode", stat);
1293 }
1294}
1295
1296/*
1297 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
1298 */
1299static void set_geometry_intr (ide_drive_t *drive)
1300{
1301 byte stat = GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))));
1302
1303 sti()__asm__ __volatile__ ("sti": : :"memory");
1304 if (!OK_STAT(stat,READY_STAT,BAD_STAT)(((stat)&((0x40)|(((0x80 | 0x01) | 0x08))))==(0x40)))
1305 ide_error(drive, "set_geometry_intr", stat);
1306}
1307
1308/*
1309 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
1310 */
1311static void recal_intr (ide_drive_t *drive)
1312{
1313 byte stat = GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))));
1314
1315 sti()__asm__ __volatile__ ("sti": : :"memory");
1316 if (!OK_STAT(stat,READY_STAT,BAD_STAT)(((stat)&((0x40)|(((0x80 | 0x01) | 0x08))))==(0x40)))
1317 ide_error(drive, "recal_intr", stat);
1318}
1319
1320/*
1321 * mc_intr() is invoked on completion of a WIN_ACKMC cmd.
1322 */
1323static void mc_intr (ide_drive_t *drive)
1324{
1325 byte stat = GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))));
1326
1327 sti()__asm__ __volatile__ ("sti": : :"memory");
1328 if (!OK_STAT(stat,READY_STAT,BAD_STAT)(((stat)&((0x40)|(((0x80 | 0x01) | 0x08))))==(0x40)))
1329 ide_error(drive, "mc_intr", stat);
1330 drive->special.b.mc = 0;
1331}
1332
1333/*
1334 * drive_cmd_intr() is invoked on completion of a special DRIVE_CMD.
1335 */
1336static void drive_cmd_intr (ide_drive_t *drive)
1337{
1338 struct request *rq = HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->rq;
1339 byte *args = (byte *) rq->buffer;
1340 byte stat = GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))));
1341
1342 sti()__asm__ __volatile__ ("sti": : :"memory");
1343 if ((stat & DRQ_STAT0x08) && args && args[3]) {
1344 byte io_32bit = drive->io_32bit;
1345 drive->io_32bit = 0;
1346 ide_input_data(drive, &args[4], args[3] * SECTOR_WORDS(512 / 4));
1347 drive->io_32bit = io_32bit;
1348 stat = GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))));
1349 }
1350 if (OK_STAT(stat,READY_STAT,BAD_STAT)(((stat)&((0x40)|(((0x80 | 0x01) | 0x08))))==(0x40)))
1351 ide_end_drive_cmd (drive, stat, GET_ERR()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(1)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(1))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(1))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(1)))));
1352 else
1353 ide_error(drive, "drive_cmd", stat); /* calls ide_end_drive_cmd */
1354}
1355
1356/*
1357 * do_special() is used to issue WIN_SPECIFY, WIN_RESTORE, and WIN_SETMULT
1358 * commands to a drive. It used to do much more, but has been scaled back.
1359 */
1360static inlineinline __attribute__((always_inline)) void do_special (ide_drive_t *drive)
1361{
1362 special_t *s = &drive->special;
1363
1364#ifdef DEBUG
1365 printk("%s: do_special: 0x%02x\n", drive->name, s->all);
1366#endif
1367 if (s->b.set_geometry) {
1368 s->b.set_geometry = 0;
1369 if (drive->media == ide_disk && !drive->no_geom) {
1370 OUT_BYTE(drive->sect,IDE_SECTOR_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(3))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(3)))) < 256) ? __outbc_p(((drive->sect)
),(((((ide_hwif_t *)((drive)->hwif))->io_base+(3))))) :
__outb_p(((drive->sect)),(((((ide_hwif_t *)((drive)->hwif
))->io_base+(3))))));
1371 OUT_BYTE(drive->cyl,IDE_LCYL_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(4))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(4)))) < 256) ? __outbc_p(((drive->cyl))
,(((((ide_hwif_t *)((drive)->hwif))->io_base+(4))))) : __outb_p
(((drive->cyl)),(((((ide_hwif_t *)((drive)->hwif))->
io_base+(4))))));
1372 OUT_BYTE(drive->cyl>>8,IDE_HCYL_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(5))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(5)))) < 256) ? __outbc_p(((drive->cyl>>
8)),(((((ide_hwif_t *)((drive)->hwif))->io_base+(5)))))
: __outb_p(((drive->cyl>>8)),(((((ide_hwif_t *)((drive
)->hwif))->io_base+(5))))));
1373 OUT_BYTE(((drive->head-1)|drive->select.all)&0xBF,IDE_SELECT_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(6))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(6)))) < 256) ? __outbc_p(((((drive->head
-1)|drive->select.all)&0xBF)),(((((ide_hwif_t *)((drive
)->hwif))->io_base+(6))))) : __outb_p(((((drive->head
-1)|drive->select.all)&0xBF)),(((((ide_hwif_t *)((drive
)->hwif))->io_base+(6))))));
1374 if (!IS_PROMISE_DRIVE(0))
1375 ide_cmd(drive, WIN_SPECIFY0x91, drive->sect, &set_geometry_intr);
1376 }
1377 } else if (s->b.recalibrate) {
1378 s->b.recalibrate = 0;
1379 if (drive->media == ide_disk && !IS_PROMISE_DRIVE(0))
1380 ide_cmd(drive, WIN_RESTORE0x10, drive->sect, &recal_intr);
1381 } else if (s->b.set_tune) {
1382 ide_tuneproc_t *tuneproc = HWIF(drive)((ide_hwif_t *)((drive)->hwif))->tuneproc;
1383 s->b.set_tune = 0;
1384 if (tuneproc != NULL((void *) 0))
1385 tuneproc(drive, drive->tune_req);
1386 } else if (s->b.set_multmode) {
1387 s->b.set_multmode = 0;
1388 if (drive->media == ide_disk) {
1389 if (drive->id && drive->mult_req > drive->id->max_multsect)
1390 drive->mult_req = drive->id->max_multsect;
1391 if (!IS_PROMISE_DRIVE(0))
1392 ide_cmd(drive, WIN_SETMULT0xC6, drive->mult_req, &set_multmode_intr);
1393 } else
1394 drive->mult_req = 0;
1395 } else if (s->b.mc) {
1396 s->b.mc = 0;
1397 if (drive->media == ide_disk && !IS_PROMISE_DRIVE(0))
1398 ide_cmd(drive, WIN_ACKMC0xdb, drive->sect, &mc_intr);
1399 } else if (s->all) {
1400 int special = s->all;
1401 s->all = 0;
1402 printk("%s: bad special flag: 0x%02x\n", drive->name, special);
1403 }
1404}
1405
1406/*
1407 * This routine busy-waits for the drive status to be not "busy".
1408 * It then checks the status for all of the "good" bits and none
1409 * of the "bad" bits, and if all is okay it returns 0. All other
1410 * cases return 1 after invoking ide_error() -- caller should just return.
1411 *
1412 * This routine should get fixed to not hog the cpu during extra long waits..
1413 * That could be done by busy-waiting for the first jiffy or two, and then
1414 * setting a timer to wake up at half second intervals thereafter,
1415 * until timeout is achieved, before timing out.
1416 */
1417int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout)
1418{
1419 byte stat;
1420 unsigned long flags;
1421
1422 udelay(1)(__builtin_constant_p(1) ? __const_udelay((1) * 0x10c6ul) : __udelay
(1)); /* spec allows drive 400ns to assert "BUSY" */
1423 if ((stat = GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))))) & BUSY_STAT0x80) {
1424 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
1425 sti()__asm__ __volatile__ ("sti": : :"memory");
1426 timeout += jiffies;
1427 while ((stat = GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))))) & BUSY_STAT0x80) {
1428 if (jiffies > timeout) {
1429 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
1430 ide_error(drive, "status timeout", stat);
1431 return 1;
1432 }
1433 }
1434 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
1435 }
1436 udelay(1)(__builtin_constant_p(1) ? __const_udelay((1) * 0x10c6ul) : __udelay
(1)); /* allow status to settle, then read it again */
1437 if (OK_STAT((stat = GET_STAT()), good, bad)((((stat = (byte)((__builtin_constant_p(((((ide_hwif_t *)((drive
)->hwif))->io_base+(7)))) && ((((ide_hwif_t *)(
(drive)->hwif))->io_base+(7))) < 256) ? __inbc_p((((
ide_hwif_t *)((drive)->hwif))->io_base+(7))) : __inb_p(
(((ide_hwif_t *)((drive)->hwif))->io_base+(7))))))&
((good)|(bad)))==(good)))
1438 return 0;
1439 ide_error(drive, "status error", stat);
1440 return 1;
1441}
1442
1443/*
1444 * do_rw_disk() issues READ and WRITE commands to a disk,
1445 * using LBA if supported, or CHS otherwise, to address sectors.
1446 * It also takes care of issuing special DRIVE_CMDs.
1447 */
1448static inlineinline __attribute__((always_inline)) void do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
1449{
1450 ide_hwif_t *hwif = HWIF(drive)((ide_hwif_t *)((drive)->hwif));
1451 unsigned short io_base = hwif->io_base;
1452#ifdef CONFIG_BLK_DEV_PROMISE
1453 int use_promise_io = 0;
1454#endif /* CONFIG_BLK_DEV_PROMISE */
1455
1456 OUT_BYTE(drive->ctl,IDE_CONTROL_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
ctl_port)))) && (((((ide_hwif_t *)((drive)->hwif))
->ctl_port))) < 256) ? __outbc_p(((drive->ctl)),((((
(ide_hwif_t *)((drive)->hwif))->ctl_port)))) : __outb_p
(((drive->ctl)),(((((ide_hwif_t *)((drive)->hwif))->
ctl_port)))));
1457 OUT_BYTE(rq->nr_sectors,io_base+IDE_NSECTOR_OFFSET)((__builtin_constant_p(((io_base+(2)))) && ((io_base+
(2))) < 256) ? __outbc_p(((rq->nr_sectors)),((io_base+(
2)))) : __outb_p(((rq->nr_sectors)),((io_base+(2)))));
1458#ifdef CONFIG_BLK_DEV_PROMISE
1459 if (IS_PROMISE_DRIVE(0)) {
1460 if (hwif->is_promise2 || rq->cmd == READ0) {
1461 use_promise_io = 1;
1462 }
1463 }
1464 if (drive->select.b.lba || use_promise_io) {
1465#else /* !CONFIG_BLK_DEV_PROMISE */
1466 if (drive->select.b.lba) {
1467#endif /* CONFIG_BLK_DEV_PROMISE */
1468#ifdef DEBUG
1469 printk("%s: %sing: LBAsect=%ld, sectors=%ld, buffer=0x%08lx\n",
1470 drive->name, (rq->cmd==READ0)?"read":"writ",
1471 block, rq->nr_sectors, (unsigned long) rq->buffer);
1472#endif
1473 OUT_BYTE(block,io_base+IDE_SECTOR_OFFSET)((__builtin_constant_p(((io_base+(3)))) && ((io_base+
(3))) < 256) ? __outbc_p(((block)),((io_base+(3)))) : __outb_p
(((block)),((io_base+(3)))));
1474 OUT_BYTE(block>>=8,io_base+IDE_LCYL_OFFSET)((__builtin_constant_p(((io_base+(4)))) && ((io_base+
(4))) < 256) ? __outbc_p(((block>>=8)),((io_base+(4)
))) : __outb_p(((block>>=8)),((io_base+(4)))));
1475 OUT_BYTE(block>>=8,io_base+IDE_HCYL_OFFSET)((__builtin_constant_p(((io_base+(5)))) && ((io_base+
(5))) < 256) ? __outbc_p(((block>>=8)),((io_base+(5)
))) : __outb_p(((block>>=8)),((io_base+(5)))));
1476 OUT_BYTE(((block>>8)&0x0f)|drive->select.all,io_base+IDE_SELECT_OFFSET)((__builtin_constant_p(((io_base+(6)))) && ((io_base+
(6))) < 256) ? __outbc_p(((((block>>8)&0x0f)|drive
->select.all)),((io_base+(6)))) : __outb_p(((((block>>
8)&0x0f)|drive->select.all)),((io_base+(6)))));
1477 } else {
1478 unsigned int sect,head,cyl,track;
1479 track = block / drive->sect;
1480 sect = block % drive->sect + 1;
1481 OUT_BYTE(sect,io_base+IDE_SECTOR_OFFSET)((__builtin_constant_p(((io_base+(3)))) && ((io_base+
(3))) < 256) ? __outbc_p(((sect)),((io_base+(3)))) : __outb_p
(((sect)),((io_base+(3)))));
1482 head = track % drive->head;
1483 cyl = track / drive->head;
1484 OUT_BYTE(cyl,io_base+IDE_LCYL_OFFSET)((__builtin_constant_p(((io_base+(4)))) && ((io_base+
(4))) < 256) ? __outbc_p(((cyl)),((io_base+(4)))) : __outb_p
(((cyl)),((io_base+(4)))));
1485 OUT_BYTE(cyl>>8,io_base+IDE_HCYL_OFFSET)((__builtin_constant_p(((io_base+(5)))) && ((io_base+
(5))) < 256) ? __outbc_p(((cyl>>8)),((io_base+(5))))
: __outb_p(((cyl>>8)),((io_base+(5)))));
1486 OUT_BYTE(head|drive->select.all,io_base+IDE_SELECT_OFFSET)((__builtin_constant_p(((io_base+(6)))) && ((io_base+
(6))) < 256) ? __outbc_p(((head|drive->select.all)),((io_base
+(6)))) : __outb_p(((head|drive->select.all)),((io_base+(6
)))));
1487#ifdef DEBUG
1488 printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n",
1489 drive->name, (rq->cmd==READ0)?"read":"writ", cyl,
1490 head, sect, rq->nr_sectors, (unsigned long) rq->buffer);
1491#endif
1492 }
1493#ifdef CONFIG_BLK_DEV_PROMISE
1494 if (use_promise_io) {
1495 do_promise_io (drive, rq);
1496 return;
1497 }
1498#endif /* CONFIG_BLK_DEV_PROMISE */
1499 if (rq->cmd == READ0) {
1500#ifdef CONFIG_BLK_DEV_TRITON1
1501 if (drive->using_dma && !(HWIF(drive)((ide_hwif_t *)((drive)->hwif))->dmaproc(ide_dma_read, drive)))
1502 return;
1503#endif /* CONFIG_BLK_DEV_TRITON */
1504 ide_set_handler(drive, &read_intr, WAIT_CMD(10*100));
1505 OUT_BYTE(drive->mult_count ? WIN_MULTREAD : WIN_READ, io_base+IDE_COMMAND_OFFSET)((__builtin_constant_p(((io_base+(7)))) && ((io_base+
(7))) < 256) ? __outbc_p(((drive->mult_count ? 0xC4 : 0x20
)),((io_base+(7)))) : __outb_p(((drive->mult_count ? 0xC4 :
0x20)),((io_base+(7)))));
1506 return;
1507 }
1508 if (rq->cmd == WRITE1) {
1509#ifdef CONFIG_BLK_DEV_TRITON1
1510 if (drive->using_dma && !(HWIF(drive)((ide_hwif_t *)((drive)->hwif))->dmaproc(ide_dma_write, drive)))
1511 return;
1512#endif /* CONFIG_BLK_DEV_TRITON */
1513 if (drive->mult_count)
1514 ide_set_handler (drive, &multwrite_intr, WAIT_CMD(10*100));
1515 else
1516 ide_set_handler (drive, &write_intr, WAIT_CMD(10*100));
1517 OUT_BYTE(drive->mult_count ? WIN_MULTWRITE : WIN_WRITE, io_base+IDE_COMMAND_OFFSET)((__builtin_constant_p(((io_base+(7)))) && ((io_base+
(7))) < 256) ? __outbc_p(((drive->mult_count ? 0xC5 : 0x30
)),((io_base+(7)))) : __outb_p(((drive->mult_count ? 0xC5 :
0x30)),((io_base+(7)))));
1518 if (ide_wait_stat(drive, DATA_READY(0x08), drive->bad_wstat, WAIT_DRQ(1*100))) {
1519 printk("%s: no DRQ after issuing %s\n", drive->name,
1520 drive->mult_count ? "MULTWRITE" : "WRITE");
1521 return;
1522 }
1523 if (!drive->unmask)
1524 cli()__asm__ __volatile__ ("cli": : :"memory");
1525 if (drive->mult_count) {
1526 HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->wrq = *rq; /* scratchpad */
1527 ide_multwrite(drive, drive->mult_count);
1528 } else {
1529 ide_output_data(drive, rq->buffer, SECTOR_WORDS(512 / 4));
1530 }
1531 return;
1532 }
1533 printk("%s: bad command: %d\n", drive->name, rq->cmd);
1534 ide_end_request(0, HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
)));
1535}
1536
1537/*
1538 * execute_drive_cmd() issues a special drive command,
1539 * usually initiated by ioctl() from the external hdparm program.
1540 */
1541static void execute_drive_cmd (ide_drive_t *drive, struct request *rq)
1542{
1543 byte *args = (byte *)rq->buffer;
1544 if (args) {
1545#ifdef DEBUG
1546 printk("%s: DRIVE_CMD cmd=0x%02x sc=0x%02x fr=0x%02x xx=0x%02x\n",
1547 drive->name, args[0], args[1], args[2], args[3]);
1548#endif
1549 OUT_BYTE(args[2],IDE_FEATURE_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(1))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(1)))) < 256) ? __outbc_p(((args[2])),(((((
ide_hwif_t *)((drive)->hwif))->io_base+(1))))) : __outb_p
(((args[2])),(((((ide_hwif_t *)((drive)->hwif))->io_base
+(1))))));
1550 ide_cmd(drive, args[0], args[1], &drive_cmd_intr);
1551 return;
1552 } else {
1553 /*
1554 * NULL is actually a valid way of waiting for
1555 * all current requests to be flushed from the queue.
1556 */
1557#ifdef DEBUG
1558 printk("%s: DRIVE_CMD (null)\n", drive->name);
1559#endif
1560 ide_end_drive_cmd(drive, GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))), GET_ERR()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(1)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(1))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(1))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(1)))));
1561 return;
1562 }
1563}
1564
1565/*
1566 * do_request() initiates handling of a new I/O request
1567 */
1568static inlineinline __attribute__((always_inline)) void do_request (ide_hwif_t *hwif, struct request *rq)
1569{
1570 unsigned int minor, unit;
1571 unsigned long block, blockend;
1572 ide_drive_t *drive;
1573
1574 sti()__asm__ __volatile__ ("sti": : :"memory");
1575#ifdef DEBUG
1576 printk("%s: do_request: current=0x%08lx\n", hwif->name, (unsigned long) rq);
1577#endif
1578 minor = MINOR(rq->rq_dev)((rq->rq_dev) & ((1<<8) - 1));
1579 unit = minor >> PARTN_BITS6;
1580 if (MAJOR(rq->rq_dev)((rq->rq_dev) >> 8) != hwif->major || unit >= MAX_DRIVES2) {
1581 printk("%s: bad device number: %s\n",
1582 hwif->name, kdevname(rq->rq_dev));
1583 goto kill_rq;
1584 }
1585 drive = &hwif->drives[unit];
1586#ifdef DEBUG
1587 if (rq->bh && !buffer_locked(rq->bh)) {
1588 printk("%s: block not locked\n", drive->name);
1589 goto kill_rq;
1590 }
1591#endif
1592 block = rq->sector;
1593 blockend = block + rq->nr_sectors;
1594 if ((blockend < block) || (blockend > drive->part[minor&PARTN_MASK((1<<6)-1)].nr_sects)) {
1595#ifdef MACH1
1596 printk ("%s%c: bad access: block=%ld, count=%ld, blockend=%ld, nr_sects%ld\n",
1597 drive->name, (minor&PARTN_MASK((1<<6)-1))?'0'+(minor&PARTN_MASK((1<<6)-1)):' ',
1598 block, rq->nr_sectors, blockend, drive->part[minor&PARTN_MASK((1<<6)-1)].nr_sects);
1599#else
1600 printk("%s%c: bad access: block=%ld, count=%ld\n", drive->name,
1601 (minor&PARTN_MASK((1<<6)-1))?'0'+(minor&PARTN_MASK((1<<6)-1)):' ', block, rq->nr_sectors);
1602#endif
1603 goto kill_rq;
1604 }
1605 block += drive->part[minor&PARTN_MASK((1<<6)-1)].start_sect + drive->sect0;
1606#if FAKE_FDISK_FOR_EZDRIVE1
1607 if (block == 0 && drive->remap_0_to_1)
1608 block = 1; /* redirect MBR access to EZ-Drive partn table */
1609#endif /* FAKE_FDISK_FOR_EZDRIVE */
1610 ((ide_hwgroup_t *)hwif->hwgroup)->drive = drive;
1611#if (DISK_RECOVERY_TIME0 > 0)
1612 while ((read_timer() - hwif->last_time) < DISK_RECOVERY_TIME0);
1613#endif
1614
1615#ifdef CONFIG_BLK_DEV_IDETAPE
1616 POLL_HWIF_TAPE_DRIVE; /* macro from ide-tape.h */
1617#endif /* CONFIG_BLK_DEV_IDETAPE */
1618
1619 SELECT_DRIVE(hwif,drive)((__builtin_constant_p(((hwif->io_base+(6)))) && (
(hwif->io_base+(6))) < 256) ? __outbc_p((((drive)->select
.all)),((hwif->io_base+(6)))) : __outb_p((((drive)->select
.all)),((hwif->io_base+(6)))));;
1620 if (ide_wait_stat(drive, drive->ready_stat, BUSY_STAT0x80|DRQ_STAT0x08, WAIT_READY(3*100/100))) {
1621 printk("%s: drive not ready for command\n", drive->name);
1622 return;
1623 }
1624
1625 if (!drive->special.all) {
1626 if (rq->cmd == IDE_DRIVE_CMD99) {
1627 execute_drive_cmd(drive, rq);
1628 return;
1629 }
1630#ifdef CONFIG_BLK_DEV_IDEATAPI1
1631 switch (drive->media) {
1632 case ide_disk:
1633 do_rw_disk (drive, rq, block);
1634 return;
1635#ifdef CONFIG_BLK_DEV_IDECD1
1636 case ide_cdrom:
1637 ide_do_rw_cdrom (drive, block);
1638 return;
1639#endif /* CONFIG_BLK_DEV_IDECD */
1640#ifdef CONFIG_BLK_DEV_IDETAPE
1641 case ide_tape:
1642 idetape_do_request (drive, rq, block);
1643 return;
1644#endif /* CONFIG_BLK_DEV_IDETAPE */
1645#ifdef CONFIG_BLK_DEV_IDEFLOPPY
1646 case ide_floppy:
1647 idefloppy_do_request (drive, rq, block);
1648 return;
1649#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
1650#ifdef CONFIG_BLK_DEV_IDESCSI
1651 case ide_scsi:
1652 idescsi_do_request (drive, rq, block);
1653 return;
1654#endif /* CONFIG_BLK_DEV_IDESCSI */
1655
1656 default:
1657 printk("%s: media type %d not supported\n",
1658 drive->name, drive->media);
1659 goto kill_rq;
1660 }
1661#else
1662 do_rw_disk (drive, rq, block); /* simpler and faster */
1663 return;
1664#endif /* CONFIG_BLK_DEV_IDEATAPI */
1665 }
1666 do_special(drive);
1667 return;
1668kill_rq:
1669 ide_end_request(0, hwif->hwgroup);
1670}
1671
1672/*
1673 * The driver enables interrupts as much as possible. In order to do this,
1674 * (a) the device-interrupt is always masked before entry, and
1675 * (b) the timeout-interrupt is always disabled before entry.
1676 *
1677 * If we enter here from, say irq14, and then start a new request for irq15,
1678 * (possible with "serialize" option) then we cannot ensure that we exit
1679 * before the irq15 hits us. So, we must be careful not to let this bother us.
1680 *
1681 * Interrupts are still masked (by default) whenever we are exchanging
1682 * data/cmds with a drive, because some drives seem to have very poor
1683 * tolerance for latency during I/O. For devices which don't suffer from
1684 * this problem (most don't), the unmask flag can be set using the "hdparm"
1685 * utility, to permit other interrupts during data/cmd transfers.
1686 */
1687void ide_do_request (ide_hwgroup_t *hwgroup)
1688{
1689 cli()__asm__ __volatile__ ("cli": : :"memory"); /* paranoia */
1690 if (hwgroup->handler != NULL((void *) 0)) {
1691 printk("%s: EEeekk!! handler not NULL in ide_do_request()\n", hwgroup->hwif->name);
1692 return;
1693 }
1694 do {
1695 ide_hwif_t *hwif = hwgroup->hwif;
1696 struct request *rq;
1697 if ((rq = hwgroup->rq) == NULL((void *) 0)) {
1698 if (hwif->sharing_irq && hwgroup->drive) /* set nIEN */
1699 OUT_BYTE(hwgroup->drive->ctl|2,hwif->ctl_port)((__builtin_constant_p(((hwif->ctl_port))) && ((hwif
->ctl_port)) < 256) ? __outbc_p(((hwgroup->drive->
ctl|2)),((hwif->ctl_port))) : __outb_p(((hwgroup->drive
->ctl|2)),((hwif->ctl_port))));
1700 /*
1701 * hwgroup->next_hwif is different from hwgroup->hwif
1702 * only when a request is inserted using "ide_next".
1703 * This saves wear and tear on IDE tapes.
1704 */
1705 hwif = hwgroup->next_hwif;
1706 do {
1707 rq = blk_dev[hwif->major].current_request;
1708 if (rq != NULL((void *) 0) && rq->rq_status != RQ_INACTIVE(-1))
1709 goto got_rq;
1710 } while ((hwif = hwif->next) != hwgroup->next_hwif);
1711 hwgroup->active = 0;
1712 return; /* no work left for this hwgroup */
1713 }
1714 got_rq:
1715 do_request(hwgroup->hwif = hwgroup->next_hwif = hwif, hwgroup->rq = rq);
1716 cli()__asm__ __volatile__ ("cli": : :"memory");
1717 } while (hwgroup->handler == NULL((void *) 0));
1718}
1719
1720/*
1721 * do_hwgroup_request() invokes ide_do_request() after first masking
1722 * all possible interrupts for the current hwgroup. This prevents race
1723 * conditions in the event that an unexpected interrupt occurs while
1724 * we are in the driver.
1725 *
1726 * Note that when an interrupt is used to reenter the driver, the first level
1727 * handler will already have masked the irq that triggered, but any other ones
1728 * for the hwgroup will still be unmasked. The driver tries to be careful
1729 * about such things.
1730 */
1731static void do_hwgroup_request (ide_hwgroup_t *hwgroup)
1732{
1733 if (hwgroup->handler == NULL((void *) 0)) {
1734 ide_hwif_t *hgif = hwgroup->hwif;
1735 ide_hwif_t *hwif = hgif;
1736 hwgroup->active = 1;
1737 do {
1738 disable_irq(hwif->irq);
1739 } while ((hwif = hwif->next) != hgif);
1740 ide_do_request (hwgroup);
1741 do {
1742 enable_irq(hwif->irq);
1743 } while ((hwif = hwif->next) != hgif);
1744 }
1745}
1746
1747static void do_ide0_request (void) /* invoked with cli() */
1748{
1749 do_hwgroup_request (ide_hwifs[0].hwgroup);
1750}
1751
1752#if MAX_HWIFS4 > 1
1753static void do_ide1_request (void) /* invoked with cli() */
1754{
1755 do_hwgroup_request (ide_hwifs[1].hwgroup);
1756}
1757#endif
1758
1759#if MAX_HWIFS4 > 2
1760static void do_ide2_request (void) /* invoked with cli() */
1761{
1762 do_hwgroup_request (ide_hwifs[2].hwgroup);
1763}
1764#endif
1765
1766#if MAX_HWIFS4 > 3
1767static void do_ide3_request (void) /* invoked with cli() */
1768{
1769 do_hwgroup_request (ide_hwifs[3].hwgroup);
1770}
1771#endif
1772
1773static void timer_expiry (unsigned long data)
1774{
1775 ide_hwgroup_t *hwgroup = (ide_hwgroup_t *) data;
1776 ide_drive_t *drive = hwgroup->drive;
1777 unsigned long flags;
1778
1779 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
1780 cli()__asm__ __volatile__ ("cli": : :"memory");
1781
1782 if (hwgroup->poll_timeout != 0) { /* polling in progress? */
1783 ide_handler_t *handler = hwgroup->handler;
1784 hwgroup->handler = NULL((void *) 0);
1785 handler(drive);
1786 } else if (hwgroup->handler == NULL((void *) 0)) { /* not waiting for anything? */
1787 sti()__asm__ __volatile__ ("sti": : :"memory"); /* drive must have responded just as the timer expired */
1788 printk("%s: marginal timeout\n", drive->name);
1789 } else {
1790 hwgroup->handler = NULL((void *) 0); /* abort the operation */
1791 if (hwgroup->hwif->dmaproc)
1792 (void) hwgroup->hwif->dmaproc (ide_dma_abort, drive);
1793 ide_error(drive, "irq timeout", GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))));
1794 }
1795 if (hwgroup->handler == NULL((void *) 0))
1796 do_hwgroup_request (hwgroup);
1797 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
1798}
1799
1800/*
1801 * There's nothing really useful we can do with an unexpected interrupt,
1802 * other than reading the status register (to clear it), and logging it.
1803 * There should be no way that an irq can happen before we're ready for it,
1804 * so we needn't worry much about losing an "important" interrupt here.
1805 *
1806 * On laptops (and "green" PCs), an unexpected interrupt occurs whenever the
1807 * drive enters "idle", "standby", or "sleep" mode, so if the status looks
1808 * "good", we just ignore the interrupt completely.
1809 *
1810 * This routine assumes cli() is in effect when called.
1811 *
1812 * If an unexpected interrupt happens on irq15 while we are handling irq14
1813 * and if the two interfaces are "serialized" (CMD640), then it looks like
1814 * we could screw up by interfering with a new request being set up for irq15.
1815 *
1816 * In reality, this is a non-issue. The new command is not sent unless the
1817 * drive is ready to accept one, in which case we know the drive is not
1818 * trying to interrupt us. And ide_set_handler() is always invoked before
1819 * completing the issuance of any new drive command, so we will not be
1820 * accidently invoked as a result of any valid command completion interrupt.
1821 *
1822 */
1823static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup)
1824{
1825 byte stat;
1826 unsigned int unit;
1827 ide_hwif_t *hwif = hwgroup->hwif;
1828
1829 /*
1830 * handle the unexpected interrupt
1831 */
1832 do {
1833 if (hwif->irq == irq) {
1834 for (unit = 0; unit < MAX_DRIVES2; ++unit) {
1835 ide_drive_t *drive = &hwif->drives[unit];
1836 if (!drive->present)
1837 continue;
1838 SELECT_DRIVE(hwif,drive)((__builtin_constant_p(((hwif->io_base+(6)))) && (
(hwif->io_base+(6))) < 256) ? __outbc_p((((drive)->select
.all)),((hwif->io_base+(6)))) : __outb_p((((drive)->select
.all)),((hwif->io_base+(6)))));;
1839 udelay(100)(__builtin_constant_p(100) ? __const_udelay((100) * 0x10c6ul)
: __udelay(100)); /* Ugly, but wait_stat() may not be safe here */
1840 if (!OK_STAT(stat=GET_STAT(), drive->ready_stat, BAD_STAT)(((stat=(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive
)->hwif))->io_base+(7)))) && ((((ide_hwif_t *)(
(drive)->hwif))->io_base+(7))) < 256) ? __inbc_p((((
ide_hwif_t *)((drive)->hwif))->io_base+(7))) : __inb_p(
(((ide_hwif_t *)((drive)->hwif))->io_base+(7)))))&(
(drive->ready_stat)|(((0x80 | 0x01) | 0x08))))==(drive->
ready_stat))) {
1841 /* Try to not flood the console with msgs */
1842 static unsigned long last_msgtime = 0;
1843 if ((last_msgtime + (HZ100/2)) < jiffies) {
1844 last_msgtime = jiffies;
1845 (void) ide_dump_status(drive, "unexpected_intr", stat);
1846 }
1847 }
1848 if ((stat & DRQ_STAT0x08))
1849 try_to_flush_leftover_data(drive);
1850 }
1851 }
1852 } while ((hwif = hwif->next) != hwgroup->hwif);
1853 SELECT_DRIVE(hwif,hwgroup->drive)((__builtin_constant_p(((hwif->io_base+(6)))) && (
(hwif->io_base+(6))) < 256) ? __outbc_p((((hwgroup->
drive)->select.all)),((hwif->io_base+(6)))) : __outb_p(
(((hwgroup->drive)->select.all)),((hwif->io_base+(6)
))));; /* Ugh.. probably interrupts current I/O */
1854 udelay(100)(__builtin_constant_p(100) ? __const_udelay((100) * 0x10c6ul)
: __udelay(100)); /* Ugly, but wait_stat() may not be safe here */
1855}
1856
1857/*
1858 * entry point for all interrupts, caller does cli() for us
1859 */
1860void ide_intr (int irq, void *dev_id, struct pt_regs *regs)
1861{
1862 ide_hwgroup_t *hwgroup = dev_id;
1863 ide_handler_t *handler;
1864
1865 if (irq == hwgroup->hwif->irq && (handler = hwgroup->handler) != NULL((void *) 0)) {
1866 ide_drive_t *drive = hwgroup->drive;
1867 hwgroup->handler = NULL((void *) 0);
1868 del_timer(&(hwgroup->timer));
1869 if (drive->unmask)
1870 sti()__asm__ __volatile__ ("sti": : :"memory");
1871 handler(drive);
1872 cli()__asm__ __volatile__ ("cli": : :"memory"); /* this is necessary, as next rq may be different irq */
1873 if (hwgroup->handler == NULL((void *) 0)) {
1874 SET_RECOVERY_TIMER(HWIF(drive));
1875 ide_do_request(hwgroup);
1876 }
1877 } else {
1878 unexpected_intr(irq, hwgroup);
1879 }
1880 cli()__asm__ __volatile__ ("cli": : :"memory");
1881}
1882
1883/*
1884 * get_info_ptr() returns the (ide_drive_t *) for a given device number.
1885 * It returns NULL if the given device number does not match any present drives.
1886 */
1887static ide_drive_t *get_info_ptr (kdev_t i_rdev)
1888{
1889 int major = MAJOR(i_rdev)((i_rdev) >> 8);
1890 unsigned int h;
1891
1892 for (h = 0; h < MAX_HWIFS4; ++h) {
1893 ide_hwif_t *hwif = &ide_hwifs[h];
1894 if (hwif->present && major == hwif->major) {
1895 unsigned unit = DEVICE_NR(i_rdev)(((i_rdev) & ((1<<8) - 1)) >> 6);
1896 if (unit < MAX_DRIVES2) {
1897 ide_drive_t *drive = &hwif->drives[unit];
1898 if (drive->present)
1899 return drive;
1900 } else if (major == IDE0_MAJOR3 && unit < 4) {
1901 printk("ide: probable bad entry for /dev/hd%c\n", 'a'+unit);
1902 printk("ide: to fix it, run: /usr/src/linux/scripts/MAKEDEV.ide\n");
1903 }
1904 break;
1905 }
1906 }
1907 return NULL((void *) 0);
1908}
1909
1910/*
1911 * This function is intended to be used prior to invoking ide_do_drive_cmd().
1912 */
1913void ide_init_drive_cmd (struct request *rq)
1914{
1915 rq->buffer = NULL((void *) 0);
1916 rq->cmd = IDE_DRIVE_CMD99;
1917 rq->sector = 0;
1918 rq->nr_sectors = 0;
1919 rq->current_nr_sectors = 0;
1920 rq->sem = NULL((void *) 0);
1921 rq->bh = NULL((void *) 0);
1922 rq->bhtail = NULL((void *) 0);
1923 rq->next = NULL((void *) 0);
1924
1925#if 0 /* these are done each time through ide_do_drive_cmd() */
1926 rq->errors = 0;
1927 rq->rq_status = RQ_ACTIVE1;
1928 rq->rq_dev = ????;
1929#endif
1930 rq->quiet = 0;
1931}
1932
1933/*
1934 * This function issues a special IDE device request
1935 * onto the request queue.
1936 *
1937 * If action is ide_wait, then the rq is queued at the end of the
1938 * request queue, and the function sleeps until it has been processed.
1939 * This is for use when invoked from an ioctl handler.
1940 *
1941 * If action is ide_preempt, then the rq is queued at the head of
1942 * the request queue, displacing the currently-being-processed
1943 * request and this function returns immediately without waiting
1944 * for the new rq to be completed. This is VERY DANGEROUS, and is
1945 * intended for careful use by the ATAPI tape/cdrom driver code.
1946 *
1947 * If action is ide_next, then the rq is queued immediately after
1948 * the currently-being-processed-request (if any), and the function
1949 * returns without waiting for the new rq to be completed. As above,
1950 * This is VERY DANGEROUS, and is intended for careful use by the
1951 * ATAPI tape/cdrom driver code.
1952 *
1953 * If action is ide_end, then the rq is queued at the end of the
1954 * request queue, and the function returns immediately without waiting
1955 * for the new rq to be completed. This is again intended for careful
1956 * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c,
1957 * when operating in the pipelined operation mode).
1958 */
1959int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action)
1960{
1961 unsigned long flags;
1962 unsigned int major = HWIF(drive)((ide_hwif_t *)((drive)->hwif))->major;
1963 struct request *cur_rq;
1964 struct blk_dev_struct *bdev = &blk_dev[major];
1965 struct semaphore sem = MUTEX_LOCKED((struct semaphore) { 0, 0, 0, ((void *) 0) });
1966
1967 if (IS_PROMISE_DRIVE(0) && rq->buffer != NULL((void *) 0))
1968 return -ENOSYS38; /* special drive cmds not supported */
1969 rq->errors = 0;
1970 rq->rq_status = RQ_ACTIVE1;
1971 rq->rq_dev = MKDEV(major,(drive->select.b.unit)<<PARTN_BITS)(((major) << 8) | ((drive->select.b.unit)<<6));
1972 if (action == ide_wait)
1973 rq->sem = &sem;
1974 unplug_device(bdev);
1975
1976 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
1977 cli()__asm__ __volatile__ ("cli": : :"memory");
1978 if (action == ide_next)
1979 HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->next_hwif = HWIF(drive)((ide_hwif_t *)((drive)->hwif));
1980 cur_rq = bdev->current_request;
1981
1982 if (cur_rq == NULL((void *) 0) || action == ide_preempt) {
1983 rq->next = cur_rq;
1984 bdev->current_request = rq;
1985 if (action == ide_preempt)
1986 HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->rq = NULL((void *) 0);
1987 } else {
1988 if (action == ide_wait || action == ide_end) {
1989 while (cur_rq->next != NULL((void *) 0)) /* find end of list */
1990 cur_rq = cur_rq->next;
1991 }
1992 rq->next = cur_rq->next;
1993 cur_rq->next = rq;
1994 }
1995 if (!HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
))->active) {
1996 do_hwgroup_request(HWGROUP(drive)((ide_hwgroup_t *)(((ide_hwif_t *)((drive)->hwif))->hwgroup
)));
1997 cli()__asm__ __volatile__ ("cli": : :"memory");
1998 }
1999 if (action == ide_wait && rq->rq_status != RQ_INACTIVE(-1))
2000 down(&sem); /* wait for it to be serviced */
2001 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2002 return rq->errors ? -EIO5 : 0; /* return -EIO if errors */
2003}
2004
2005static int ide_open(struct inode * inode, struct file * filp)
2006{
2007 ide_drive_t *drive;
2008 unsigned long flags;
2009
2010 if ((drive = get_info_ptr(inode->i_rdev)) == NULL((void *) 0))
2011 return -ENXIO6;
2012 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
2013 cli()__asm__ __volatile__ ("cli": : :"memory");
2014 while (drive->busy)
2015 sleep_on(&drive->wqueue);
2016 drive->usage++;
2017 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2018#ifdef CONFIG_BLK_DEV_IDECD1
2019 if (drive->media == ide_cdrom)
2020 return ide_cdrom_open (inode, filp, drive);
2021#endif /* CONFIG_BLK_DEV_IDECD */
2022#ifdef CONFIG_BLK_DEV_IDETAPE
2023 if (drive->media == ide_tape)
2024 return idetape_blkdev_open (inode, filp, drive);
2025#endif /* CONFIG_BLK_DEV_IDETAPE */
2026#ifdef CONFIG_BLK_DEV_IDEFLOPPY
2027 if (drive->media == ide_floppy)
2028 return idefloppy_open (inode, filp, drive);
2029#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
2030#ifdef CONFIG_BLK_DEV_IDESCSI
2031 if (drive->media == ide_scsi)
2032 return idescsi_open (inode, filp, drive);
2033#endif /* CONFIG_BLK_DEV_IDESCSI */
2034 if (drive->removable && drive->usage == 1) {
2035 byte door_lock[] = {WIN_DOORLOCK0xde,0,0,0};
2036 struct request rq;
2037 check_disk_change(inode->i_rdev);
2038 ide_init_drive_cmd (&rq);
2039 rq.buffer = (char *)door_lock;
2040 /*
2041 * Ignore the return code from door_lock,
2042 * since the open() has already succeeded,
2043 * and the door_lock is irrelevant at this point.
2044 */
2045 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
2046 }
2047 return 0;
2048}
2049
2050/*
2051 * Releasing a block device means we sync() it, so that it can safely
2052 * be forgotten about...
2053 */
2054static void ide_release(struct inode * inode, struct file * file)
2055{
2056 ide_drive_t *drive;
2057
2058 if ((drive = get_info_ptr(inode->i_rdev)) != NULL((void *) 0)) {
2059 fsync_dev(inode->i_rdev);
2060 drive->usage--;
2061#ifdef CONFIG_BLK_DEV_IDECD1
2062 if (drive->media == ide_cdrom) {
2063 ide_cdrom_release (inode, file, drive);
2064 return;
2065 }
2066#endif /* CONFIG_BLK_DEV_IDECD */
2067#ifdef CONFIG_BLK_DEV_IDETAPE
2068 if (drive->media == ide_tape) {
2069 idetape_blkdev_release (inode, file, drive);
2070 return;
2071 }
2072#endif /* CONFIG_BLK_DEV_IDETAPE */
2073#ifdef CONFIG_BLK_DEV_IDEFLOPPY
2074 if (drive->media == ide_floppy) {
2075 idefloppy_release (inode, file, drive);
2076 return;
2077 }
2078#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
2079#ifdef CONFIG_BLK_DEV_IDESCSI
2080 if (drive->media == ide_scsi) {
2081 idescsi_ide_release (inode, file, drive);
2082 return;
2083 }
2084#endif /* CONFIG_BLK_DEV_IDESCSI */
2085 if (drive->removable && !drive->usage) {
2086 byte door_unlock[] = {WIN_DOORUNLOCK0xdf,0,0,0};
2087 struct request rq;
2088 invalidate_buffers(inode->i_rdev);
2089 ide_init_drive_cmd (&rq);
2090 rq.buffer = (char *)door_unlock;
2091 (void) ide_do_drive_cmd(drive, &rq, ide_wait);
2092 }
2093 }
2094}
2095
2096/*
2097 * This routine is called to flush all partitions and partition tables
2098 * for a changed disk, and then re-read the new partition table.
2099 * If we are revalidating a disk because of a media change, then we
2100 * enter with usage == 0. If we are using an ioctl, we automatically have
2101 * usage == 1 (we need an open channel to use an ioctl :-), so this
2102 * is our limit.
2103 */
2104static int revalidate_disk(kdev_t i_rdev)
2105{
2106 ide_drive_t *drive;
2107 unsigned int p, major, minor;
2108 long flags;
2109
2110 if ((drive = get_info_ptr(i_rdev)) == NULL((void *) 0))
2111 return -ENODEV19;
2112
2113 major = MAJOR(i_rdev)((i_rdev) >> 8);
2114 minor = drive->select.b.unit << PARTN_BITS6;
2115 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
2116 cli()__asm__ __volatile__ ("cli": : :"memory");
2117 if (drive->busy || (drive->usage > 1)) {
2118 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2119 return -EBUSY16;
2120 };
2121 drive->busy = 1;
2122 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2123
2124 for (p = 0; p < (1<<PARTN_BITS6); ++p) {
2125 if (drive->part[p].nr_sects > 0) {
2126 kdev_t devp = MKDEV(major, minor+p)(((major) << 8) | (minor+p));
2127 fsync_dev (devp);
2128 invalidate_inodes (devp);
2129 invalidate_buffers (devp);
2130 set_blocksize(devp, 1024);
2131 }
2132 drive->part[p].start_sect = 0;
2133 drive->part[p].nr_sects = 0;
2134 };
2135
2136 drive->part[0].nr_sects = current_capacity(drive);
2137 if ((drive->media != ide_disk && drive->media != ide_floppy) || !drive->part[0].nr_sects)
2138 drive->part[0].start_sect = -1;
2139 resetup_one_dev(HWIF(drive)((ide_hwif_t *)((drive)->hwif))->gd, drive->select.b.unit);
2140
2141 drive->busy = 0;
2142 wake_up(&drive->wqueue);
2143 return 0;
2144}
2145
2146static int write_fs_long (unsigned long useraddr, long value)
2147{
2148 int err;
2149
2150 if (NULL((void *) 0) == (long *)useraddr)
2151 return -EINVAL22;
2152 if ((err = verify_area(VERIFY_WRITE1, (long *)useraddr, sizeof(long))))
2153 return err;
2154 put_user((unsigned)value, (long *) useraddr)__put_user((unsigned long)((unsigned)value),((long *) useraddr
),sizeof(*((long *) useraddr)));
2155 return 0;
2156}
2157
2158static int ide_ioctl (struct inode *inode, struct file *file,
2159 unsigned int cmd, unsigned long arg)
2160{
2161 int err;
2162 ide_drive_t *drive;
2163 unsigned long flags;
2164 struct request rq;
2165
2166 if (!inode || !(inode->i_rdev))
1
Assuming 'inode' is non-null
→
2
←
Taking false branch
→
2167 return -EINVAL22;
2168 if ((drive = get_info_ptr(inode->i_rdev)) == NULL((void *) 0))
3
←
Taking false branch
→
2169 return -ENODEV19;
2170 ide_init_drive_cmd (&rq);
2171 switch (cmd) {
4
←
Control jumps to 'case 799:' at line 2320
→
2172 case HDIO_GETGEO0x0301:
2173 {
2174 struct hd_geometry *loc = (struct hd_geometry *) arg;
2175 if (!loc || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL22;
2176#ifdef MACH1
2177 loc->heads = drive->bios_head;
2178 loc->sectors = drive->bios_sect;
2179 loc->cylinders = drive->bios_cyl;
2180 loc->start
2181 = (drive->part[MINOR(inode->i_rdev)((inode->i_rdev) & ((1<<8) - 1))&PARTN_MASK((1<<6)-1)]
2182 .start_sect);
2183#else
2184 err = verify_area(VERIFY_WRITE1, loc, sizeof(*loc));
2185 if (err) return err;
2186 put_user(drive->bios_head, (byte *) &loc->heads)__put_user((unsigned long)(drive->bios_head),((byte *) &
loc->heads),sizeof(*((byte *) &loc->heads)));
2187 put_user(drive->bios_sect, (byte *) &loc->sectors)__put_user((unsigned long)(drive->bios_sect),((byte *) &
loc->sectors),sizeof(*((byte *) &loc->sectors)));
2188 put_user(drive->bios_cyl, (unsigned short *) &loc->cylinders)__put_user((unsigned long)(drive->bios_cyl),((unsigned short
*) &loc->cylinders),sizeof(*((unsigned short *) &
loc->cylinders)));
2189 put_user((unsigned)drive->part[MINOR(inode->i_rdev)&PARTN_MASK].start_sect,__put_user((unsigned long)((unsigned)drive->part[((inode->
i_rdev) & ((1<<8) - 1))&((1<<6)-1)].start_sect
),((unsigned long *) &loc->start),sizeof(*((unsigned long
*) &loc->start)))
2190 (unsigned long *) &loc->start)__put_user((unsigned long)((unsigned)drive->part[((inode->
i_rdev) & ((1<<8) - 1))&((1<<6)-1)].start_sect
),((unsigned long *) &loc->start),sizeof(*((unsigned long
*) &loc->start)));
2191#endif
2192 return 0;
2193 }
2194 case BLKFLSBUF(((0U) << (((0 +8)+8)+14)) | (((0x12)) << (0 +8))
| (((97)) << 0) | ((0) << ((0 +8)+8))):
2195 if (!suser()) return -EACCES13;
2196 fsync_dev(inode->i_rdev);
2197 invalidate_buffers(inode->i_rdev);
2198 return 0;
2199
2200 case BLKRASET(((0U) << (((0 +8)+8)+14)) | (((0x12)) << (0 +8))
| (((98)) << 0) | ((0) << ((0 +8)+8))):
2201 if (!suser()) return -EACCES13;
2202 if(arg > 0xff) return -EINVAL22;
2203 read_ahead[MAJOR(inode->i_rdev)((inode->i_rdev) >> 8)] = arg;
2204 return 0;
2205
2206 case BLKRAGET(((0U) << (((0 +8)+8)+14)) | (((0x12)) << (0 +8))
| (((99)) << 0) | ((0) << ((0 +8)+8))):
2207 return write_fs_long(arg, read_ahead[MAJOR(inode->i_rdev)((inode->i_rdev) >> 8)]);
2208
2209 case BLKGETSIZE(((0U) << (((0 +8)+8)+14)) | (((0x12)) << (0 +8))
| (((96)) << 0) | ((0) << ((0 +8)+8))): /* Return device size */
2210 return write_fs_long(arg, drive->part[MINOR(inode->i_rdev)((inode->i_rdev) & ((1<<8) - 1))&PARTN_MASK((1<<6)-1)].nr_sects);
2211 case BLKRRPART(((0U) << (((0 +8)+8)+14)) | (((0x12)) << (0 +8))
| (((95)) << 0) | ((0) << ((0 +8)+8))): /* Re-read partition tables */
2212 if (!suser()) return -EACCES13;
2213 return revalidate_disk(inode->i_rdev);
2214
2215 case HDIO_GET_KEEPSETTINGS0x0308:
2216 return write_fs_long(arg, drive->keep_settings);
2217
2218 case HDIO_GET_UNMASKINTR0x0302:
2219 return write_fs_long(arg, drive->unmask);
2220
2221 case HDIO_GET_DMA0x030b:
2222 return write_fs_long(arg, drive->using_dma);
2223
2224 case HDIO_GET_32BIT0x0309:
2225 return write_fs_long(arg, drive->io_32bit);
2226
2227 case HDIO_GET_MULTCOUNT0x0304:
2228 return write_fs_long(arg, drive->mult_count);
2229
2230 case HDIO_GET_IDENTITY0x030d:
2231 if (!arg || (MINOR(inode->i_rdev)((inode->i_rdev) & ((1<<8) - 1)) & PARTN_MASK((1<<6)-1)))
2232 return -EINVAL22;
2233 if (drive->id == NULL((void *) 0))
2234 return -ENOMSG42;
2235 err = verify_area(VERIFY_WRITE1, (char *)arg, sizeof(*drive->id));
2236 if (!err)
2237 memcpy_tofs((char *)arg, (char *)drive->id, sizeof(*drive->id));
2238 return err;
2239
2240 case HDIO_GET_NOWERR0x030a:
2241 return write_fs_long(arg, drive->bad_wstat == BAD_R_STAT(0x80 | 0x01));
2242
2243 case HDIO_SET_DMA0x0326:
2244 if (!suser()) return -EACCES13;
2245#ifdef CONFIG_BLK_DEV_IDECD1
2246 if (drive->media == ide_cdrom)
2247 return -EPERM1;
2248#endif /* CONFIG_BLK_DEV_IDECD */
2249 if (!drive->id || !(drive->id->capability & 1) || !HWIF(drive)((ide_hwif_t *)((drive)->hwif))->dmaproc)
2250 return -EPERM1;
2251 case HDIO_SET_KEEPSETTINGS0x0323:
2252 case HDIO_SET_UNMASKINTR0x0322:
2253 case HDIO_SET_NOWERR0x0325:
2254 if (arg > 1)
2255 return -EINVAL22;
2256 case HDIO_SET_32BIT0x0324:
2257 if (!suser()) return -EACCES13;
2258 if ((MINOR(inode->i_rdev)((inode->i_rdev) & ((1<<8) - 1)) & PARTN_MASK((1<<6)-1)))
2259 return -EINVAL22;
2260 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
2261 cli()__asm__ __volatile__ ("cli": : :"memory");
2262 switch (cmd) {
2263 case HDIO_SET_DMA0x0326:
2264 if (!(HWIF(drive)((ide_hwif_t *)((drive)->hwif))->dmaproc)) {
2265 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2266 return -EPERM1;
2267 }
2268 drive->using_dma = arg;
2269 break;
2270 case HDIO_SET_KEEPSETTINGS0x0323:
2271 drive->keep_settings = arg;
2272 break;
2273 case HDIO_SET_UNMASKINTR0x0322:
2274 if (arg && drive->no_unmask) {
2275 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2276 return -EPERM1;
2277 }
2278 drive->unmask = arg;
2279 break;
2280 case HDIO_SET_NOWERR0x0325:
2281 drive->bad_wstat = arg ? BAD_R_STAT(0x80 | 0x01) : BAD_W_STAT((0x80 | 0x01) | 0x20);
2282 break;
2283 case HDIO_SET_32BIT0x0324:
2284 if (arg > (1 + (SUPPORT_VLB_SYNC1<<1))) {
2285 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2286 return -EINVAL22;
2287 }
2288 if (arg && drive->no_io_32bit) {
2289 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2290 return -EPERM1;
2291 }
2292 drive->io_32bit = arg;
2293#ifdef CONFIG_BLK_DEV_DTC2278
2294 if (HWIF(drive)((ide_hwif_t *)((drive)->hwif))->chipset == ide_dtc2278)
2295 HWIF(drive)((ide_hwif_t *)((drive)->hwif))->drives[!drive->select.b.unit].io_32bit = arg;
2296#endif /* CONFIG_BLK_DEV_DTC2278 */
2297 break;
2298 }
2299 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2300 return 0;
2301
2302 case HDIO_SET_MULTCOUNT0x0321:
2303 if (!suser()) return -EACCES13;
2304 if (MINOR(inode->i_rdev)((inode->i_rdev) & ((1<<8) - 1)) & PARTN_MASK((1<<6)-1))
2305 return -EINVAL22;
2306 if (drive->id && arg > drive->id->max_multsect)
2307 return -EINVAL22;
2308 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
2309 cli()__asm__ __volatile__ ("cli": : :"memory");
2310 if (drive->special.b.set_multmode) {
2311 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2312 return -EBUSY16;
2313 }
2314 drive->mult_req = arg;
2315 drive->special.b.set_multmode = 1;
2316 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2317 (void) ide_do_drive_cmd (drive, &rq, ide_wait);
2318 return (drive->mult_count == arg) ? 0 : -EIO5;
2319
2320 case HDIO_DRIVE_CMD0x031f:
2321 {
2322 byte args[4], *argbuf = args;
2323 int argsize = 4;
2324 if (!suser() || securelevel > 0) return -EACCES13;
5
←
Assuming 'securelevel' is <= 0
→
6
←
Taking false branch
→
2325 if (NULL((void *) 0) == (void *) arg) {
7
←
Taking false branch
→
2326 err = ide_do_drive_cmd(drive, &rq, ide_wait);
2327 } else if (!(err = verify_area(VERIFY_READ0,(void *)arg, 4))) {
8
←
Assuming 'err' is zero
→
9
←
Taking true branch
→
2328 memcpy_fromfs(args, (void *)arg, 4);
2329 if (args[3]) {
10
←
Taking false branch
→
2330 argsize = 4 + (SECTOR_WORDS(512 / 4) * 4 * args[3]);
2331 argbuf = kmalloclinux_kmalloc(argsize, GFP_KERNEL0x03);
2332 if (argbuf == NULL((void *) 0))
2333 return -ENOMEM12;
2334 argbuf[0] = args[0];
2335 argbuf[1] = args[1];
2336 argbuf[2] = args[2];
2337 argbuf[3] = args[3];
2338 }
2339 if (!(err = verify_area(VERIFY_WRITE1,(void *)arg, argsize))) {
11
←
Assuming 'err' is zero
→
12
←
Taking true branch
→
2340 rq.buffer = (char *)argbuf;
2341 err = ide_do_drive_cmd(drive, &rq, ide_wait);
2342 memcpy_tofs((void *)arg, argbuf, argsize);
2343 }
2344 if (argsize > 4)
13
←
Taking false branch
→
2345 kfreelinux_kfree(argbuf);
2346 }
2347 return err;
2348 }
2349 case HDIO_SET_PIO_MODE0x0327:
2350 if (!suser()) return -EACCES13;
2351 if (MINOR(inode->i_rdev)((inode->i_rdev) & ((1<<8) - 1)) & PARTN_MASK((1<<6)-1))
2352 return -EINVAL22;
2353 if (!HWIF(drive)((ide_hwif_t *)((drive)->hwif))->tuneproc)
2354 return -ENOSYS38;
2355 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
2356 cli()__asm__ __volatile__ ("cli": : :"memory");
2357 if (drive->special.b.set_tune) {
2358 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2359 return -EBUSY16;
2360 }
2361 drive->tune_req = (byte) arg;
2362 drive->special.b.set_tune = 1;
2363 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2364 (void) ide_do_drive_cmd (drive, &rq, ide_wait);
2365 return 0;
2366
2367 RO_IOCTLS(inode->i_rdev, arg)case (((0U) << (((0 +8)+8)+14)) | (((0x12)) << (0
+8)) | (((93)) << 0) | ((0) << ((0 +8)+8))): { int
__err; if (!suser()) return -13; __err = verify_area(0, (void
*) (arg), sizeof(long)); if (!__err) set_device_ro((inode->
i_rdev),__get_user((const unsigned int *)((long *) (arg)),4))
; return __err; } case (((0U) << (((0 +8)+8)+14)) | (((
0x12)) << (0 +8)) | (((94)) << 0) | ((0) <<
((0 +8)+8))): { int __err = verify_area(1, (void *) (arg), sizeof
(long)); if (!__err) __put_user((0!=is_read_only(inode->i_rdev
)),(unsigned int *)((long *) (arg)),4); return __err; };
2368
2369 default:
2370#ifdef CONFIG_BLK_DEV_IDECD1
2371 if (drive->media == ide_cdrom)
2372 return ide_cdrom_ioctl(drive, inode, file, cmd, arg);
2373#endif /* CONFIG_BLK_DEV_IDECD */
2374#ifdef CONFIG_BLK_DEV_IDETAPE
2375 if (drive->media == ide_tape)
2376 return idetape_blkdev_ioctl(drive, inode, file, cmd, arg);
2377#endif /* CONFIG_BLK_DEV_IDETAPE */
2378#ifdef CONFIG_BLK_DEV_IDEFLOPPY
2379 if (drive->media == ide_floppy)
2380 return idefloppy_ioctl(drive, inode, file, cmd, arg);
2381#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
2382#ifdef CONFIG_BLK_DEV_IDESCSI
2383 if (drive->media == ide_scsi)
2384 return idescsi_ioctl(drive, inode, file, cmd, arg);
2385#endif /* CONFIG_BLK_DEV_IDESCSI */
2386 return -EPERM1;
2387 }
2388}
14
←
Address of stack memory associated with local variable 'rq' is still referred to by the global variable 'blk_dev' upon returning to the caller. This will be a dangling reference
2389
2390static int ide_check_media_change (kdev_t i_rdev)
2391{
2392 ide_drive_t *drive;
2393
2394 if ((drive = get_info_ptr(i_rdev)) == NULL((void *) 0))
2395 return -ENODEV19;
2396#ifdef CONFIG_BLK_DEV_IDECD1
2397 if (drive->media == ide_cdrom)
2398 return ide_cdrom_check_media_change (drive);
2399#endif /* CONFIG_BLK_DEV_IDECD */
2400#ifdef CONFIG_BLK_DEV_IDEFLOPPY
2401 if (drive->media == ide_floppy)
2402 return idefloppy_media_change (drive);
2403#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
2404 if (drive->removable) /* for disks */
2405 return 1; /* always assume it was changed */
2406 return 0;
2407}
2408
2409void ide_fixstring (byte *s, const int bytecount, const int byteswap)
2410{
2411 byte *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
2412
2413 if (byteswap) {
2414 /* convert from big-endian to host byte order */
2415 for (p = end ; p != s;) {
2416 unsigned short *pp = (unsigned short *) (p -= 2);
2417 *pp = ntohs(*pp);
2418 }
2419 }
2420
2421 /* strip leading blanks */
2422 while (s != end && *s == ' ')
2423 ++s;
2424
2425 /* compress internal blanks and strip trailing blanks */
2426 while (s != end && *s) {
2427 if (*s++ != ' ' || (s != end && *s && *s != ' '))
2428 *p++ = *(s-1);
2429 }
2430
2431 /* wipe out trailing garbage */
2432 while (p != end)
2433 *p++ = '\0';
2434}
2435
2436static inlineinline __attribute__((always_inline)) void do_identify (ide_drive_t *drive, byte cmd)
2437{
2438 int bswap;
2439 struct hd_driveid *id;
2440 unsigned long capacity, check;
2441
2442 id = drive->id = kmalloclinux_kmalloc (SECTOR_WORDS(512 / 4)*4, GFP_KERNEL0x03);
2443 ide_input_data(drive, id, SECTOR_WORDS(512 / 4));/* read 512 bytes of id info */
2444 sti()__asm__ __volatile__ ("sti": : :"memory");
2445
2446#if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO1) || defined (CONFIG_SCSI_EATA1)
2447 /*
2448 * EATA SCSI controllers do a hardware ATA emulation:
2449 * Ignore them if there is a driver for them available.
2450 */
2451 if ((id->model[0] == 'P' && id->model[1] == 'M')
2452 || (id->model[0] == 'S' && id->model[1] == 'K')) {
2453 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
2454 drive->present = 0;
2455 return;
2456 }
2457#endif
2458
2459 /*
2460 * WIN_IDENTIFY returns little-endian info,
2461 * WIN_PIDENTIFY *usually* returns little-endian info.
2462 */
2463 bswap = 1;
2464 if (cmd == WIN_PIDENTIFY0xA1) {
2465 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
2466 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
2467 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
2468 bswap = 0; /* Vertos drives may still be weird */
2469 }
2470 ide_fixstring (id->model, sizeof(id->model), bswap);
2471 ide_fixstring (id->fw_rev, sizeof(id->fw_rev), bswap);
2472 ide_fixstring (id->serial_no, sizeof(id->serial_no), bswap);
2473
2474 if (strstr((char *)id->model, "E X A B Y T E N E S T"))
2475 return;
2476
2477#ifdef CONFIG_BLK_DEV_IDEATAPI1
2478 /*
2479 * Check for an ATAPI device
2480 */
2481 if (cmd == WIN_PIDENTIFY0xA1) {
2482 byte type = (id->config >> 8) & 0x1f;
2483 printk("%s: %s, ATAPI ", drive->name, id->model);
2484#ifdef CONFIG_BLK_DEV_PROMISE
2485 if (HWIF(drive)((ide_hwif_t *)((drive)->hwif))->is_promise2) {
2486 printk(" -- not supported on 2nd Promise port\n");
2487 drive->present = 0;
2488 return;
2489 }
2490#endif /* CONFIG_BLK_DEV_PROMISE */
2491 if (!drive->ide_scsi) switch (type) {
2492 case 0:
2493 if (!strstr((char *)id->model, "oppy") &&
2494 !strstr((char *)id->model, "poyp") &&
2495 !strstr((char *)id->model, "ZIP"))
2496 printk("cdrom or floppy?, assuming ");
2497 if (drive->media != ide_cdrom &&
2498 !strstr((char *)id->model, "CD-ROM")) {
2499#ifdef CONFIG_BLK_DEV_IDEFLOPPY
2500 printk("FLOPPY drive\n");
2501 drive->media = ide_floppy;
2502 if (idefloppy_identify_device(drive, id))
2503 drive->present = 1;
2504 return;
2505#else
2506 printk("FLOPPY ");
2507 break;
2508#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
2509 }
2510 /* Early cdrom models used zero */
2511 case 5:
2512#ifdef CONFIG_BLK_DEV_IDECD1
2513 printk ("CDROM drive\n");
2514 drive->media = ide_cdrom;
2515 drive->present = 1;
2516 drive->removable = 1;
2517 return;
2518#else
2519 printk ("CDROM ");
2520 break;
2521#endif /* CONFIG_BLK_DEV_IDECD */
2522 case 1:
2523#ifdef CONFIG_BLK_DEV_IDETAPE
2524 printk ("TAPE drive");
2525 if (idetape_identify_device (drive,id)) {
2526 drive->media = ide_tape;
2527 drive->present = 1;
2528 drive->removable = 1;
2529 if (drive->autotune != 2 && HWIF(drive)((ide_hwif_t *)((drive)->hwif))->dmaproc != NULL((void *) 0)) {
2530 if (!HWIF(drive)((ide_hwif_t *)((drive)->hwif))->dmaproc(ide_dma_check, drive))
2531 printk(", DMA");
2532 }
2533 printk("\n");
2534 }
2535 else {
2536 drive->present = 0;
2537 printk ("\nide-tape: the tape is not supported by this version of the driver\n");
2538 }
2539 return;
2540#else
2541 printk ("TAPE ");
2542 break;
2543#endif /* CONFIG_BLK_DEV_IDETAPE */
2544 default:
2545 drive->present = 0;
2546 printk("Type %d - Unknown device\n", type);
2547 return;
2548 }
2549#ifdef CONFIG_BLK_DEV_IDESCSI
2550 printk("drive - enabling SCSI emulation\n");
2551 drive->media = ide_scsi;
2552 drive->present = 1;
2553 idescsi_setup(drive);
2554#else
2555 drive->present = 0;
2556 printk("- not supported by this kernel\n");
2557#endif /* CONFIG_BLK_DEV_IDESCSI */
2558 return;
2559 }
2560#endif /* CONFIG_BLK_DEV_IDEATAPI */
2561
2562 /* check for removable disks (eg. SYQUEST), ignore 'WD' drives */
2563 if (id->config & (1<<7)) { /* removable disk ? */
2564 if (id->model[0] != 'W' || id->model[1] != 'D')
2565 drive->removable = 1;
2566 }
2567
2568 /* SunDisk drives: treat as non-removable, force one unit */
2569 if (id->model[0] == 'S' && id->model[1] == 'u') {
2570 drive->removable = 0;
2571 if (drive->select.all & (1<<4)) {
2572 drive->present = 0;
2573 return;
2574 }
2575 }
2576
2577 drive->media = ide_disk;
2578 /* Extract geometry if we did not already have one for the drive */
2579 if (!drive->present) {
2580 drive->present = 1;
2581 drive->cyl = drive->bios_cyl = id->cyls;
2582 drive->head = drive->bios_head = id->heads;
2583 drive->sect = drive->bios_sect = id->sectors;
2584 }
2585 /* Handle logical geometry translation by the drive */
2586 if ((id->field_valid & 1) && id->cur_cyls && id->cur_heads
2587 && (id->cur_heads <= 16) && id->cur_sectors) {
2588 /*
2589 * Extract the physical drive geometry for our use.
2590 * Note that we purposely do *not* update the bios info.
2591 * This way, programs that use it (like fdisk) will
2592 * still have the same logical view as the BIOS does,
2593 * which keeps the partition table from being screwed.
2594 *
2595 * An exception to this is the cylinder count,
2596 * which we reexamine later on to correct for 1024 limitations.
2597 */
2598 drive->cyl = id->cur_cyls;
2599 drive->head = id->cur_heads;
2600 drive->sect = id->cur_sectors;
2601
2602 /* check for word-swapped "capacity" field in id information */
2603 capacity = drive->cyl * drive->head * drive->sect;
2604 check = (id->cur_capacity0 << 16) | id->cur_capacity1;
2605 if (check == capacity) { /* was it swapped? */
2606 /* yes, bring it into little-endian order: */
2607 id->cur_capacity0 = (capacity >> 0) & 0xffff;
2608 id->cur_capacity1 = (capacity >> 16) & 0xffff;
2609 }
2610 }
2611 /* Use physical geometry if what we have still makes no sense */
2612 if ((!drive->head || drive->head > 16) &&
2613 id->heads && id->heads <= 16) {
2614 drive->cyl = id->cyls;
2615 drive->head = id->heads;
2616 drive->sect = id->sectors;
2617 }
2618
2619 /* calculate drive capacity, and select LBA if possible */
2620 capacity = current_capacity (drive);
2621
2622 /*
2623 * if possible, give fdisk access to more of the drive,
2624 * by correcting bios_cyls:
2625 */
2626 if (capacity > drive->bios_cyl * drive->bios_head * drive->bios_sect
2627 && !drive->forced_geom && drive->bios_sect && drive->bios_head) {
2628 int cyl = (capacity / drive->bios_sect) / drive->bios_head;
2629 if (cyl <= 65535)
2630 drive->bios_cyl = cyl;
2631 else {
2632 /* OK until 539 GB */
2633 drive->bios_sect = 63;
2634 drive->bios_head = 255;
2635 drive->bios_cyl = capacity / (63*255);
2636 }
2637 }
2638
2639 if (!strncmp((char *)id->model, "BMI ", 4) &&
2640 strstr((char *)id->model, " ENHANCED IDE ") &&
2641 drive->select.b.lba)
2642 drive->no_geom = 1;
2643
2644 printk ("%s: %.40s, %ldMB w/%dkB Cache, CHS=%d/%d/%d",
2645 drive->name, id->model, current_capacity(drive)/2048L, id->buf_size/2,
2646 drive->bios_cyl, drive->bios_head, drive->bios_sect);
2647
2648 drive->mult_count = 0;
2649 if (id->max_multsect) {
2650 drive->mult_req = INITIAL_MULT_COUNT16;
2651 if (drive->mult_req > id->max_multsect)
2652 drive->mult_req = id->max_multsect;
2653 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
2654 drive->special.b.set_multmode = 1;
2655 }
2656 if (drive->autotune != 2 && HWIF(drive)((ide_hwif_t *)((drive)->hwif))->dmaproc != NULL((void *) 0)) {
2657 if (!(HWIF(drive)((ide_hwif_t *)((drive)->hwif))->dmaproc(ide_dma_check, drive))) {
2658 if ((id->field_valid & 4) && (id->dma_ultra & (id->dma_ultra >> 8) & 7))
2659 printk(", UDMA");
2660 else
2661 printk(", DMA");
2662 }
2663 }
2664 printk("\n");
2665}
2666
2667/*
2668 * Delay for *at least* 50ms. As we don't know how much time is left
2669 * until the next tick occurs, we wait an extra tick to be safe.
2670 * This is used only during the probing/polling for drives at boot time.
2671 */
2672static void delay_50ms (void)
2673{
2674 unsigned long timer = jiffies + ((HZ100 + 19)/20) + 1;
2675 while (timer > jiffies);
2676}
2677
2678/*
2679 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
2680 * and waits for a response. It also monitors irqs while this is
2681 * happening, in hope of automatically determining which one is
2682 * being used by the interface.
2683 *
2684 * Returns: 0 device was identified
2685 * 1 device timed-out (no response to identify request)
2686 * 2 device aborted the command (refused to identify itself)
2687 */
2688static int try_to_identify (ide_drive_t *drive, byte cmd)
2689{
2690 int hd_status, rc;
2691 unsigned long timeout;
2692 unsigned long irqs_on = 0;
2693 int irq_off;
2694
2695 if (!HWIF(drive)((ide_hwif_t *)((drive)->hwif))->irq) { /* already got an IRQ? */
2696 probe_irq_off(probe_irq_on()); /* clear dangling irqs */
2697 irqs_on = probe_irq_on(); /* start monitoring irqs */
2698 OUT_BYTE(drive->ctl,IDE_CONTROL_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
ctl_port)))) && (((((ide_hwif_t *)((drive)->hwif))
->ctl_port))) < 256) ? __outbc_p(((drive->ctl)),((((
(ide_hwif_t *)((drive)->hwif))->ctl_port)))) : __outb_p
(((drive->ctl)),(((((ide_hwif_t *)((drive)->hwif))->
ctl_port))))); /* enable device irq */
2699 }
2700
2701 delay_50ms(); /* take a deep breath */
2702 if ((IN_BYTE(IDE_ALTSTATUS_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->ctl_port))) && ((((ide_hwif_t *)((drive)->hwif
))->ctl_port)) < 256) ? __inbc_p((((ide_hwif_t *)((drive
)->hwif))->ctl_port)) : __inb_p((((ide_hwif_t *)((drive
)->hwif))->ctl_port))) ^ IN_BYTE(IDE_STATUS_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))))) & ~INDEX_STAT0x02) {
2703 printk("%s: probing with STATUS instead of ALTSTATUS\n", drive->name);
2704 hd_status = IDE_STATUS_REG(((ide_hwif_t *)((drive)->hwif))->io_base+(7)); /* ancient Seagate drives */
2705 } else
2706 hd_status = IDE_ALTSTATUS_REG(((ide_hwif_t *)((drive)->hwif))->ctl_port); /* use non-intrusive polling */
2707
2708#if CONFIG_BLK_DEV_PROMISE
2709 if (IS_PROMISE_DRIVE(0)) {
2710 if (promise_cmd(drive,PROMISE_IDENTIFY)) {
2711 if (irqs_on)
2712 (void) probe_irq_off(irqs_on);
2713 return 1;
2714 }
2715 } else
2716#endif /* CONFIG_BLK_DEV_PROMISE */
2717 OUT_BYTE(cmd,IDE_COMMAND_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(7))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) < 256) ? __outbc_p(((cmd)),(((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))))) : __outb_p(((cmd))
,(((((ide_hwif_t *)((drive)->hwif))->io_base+(7)))))); /* ask drive for ID */
2718 timeout = ((cmd == WIN_IDENTIFY0xEC) ? WAIT_WORSTCASE(30*100) : WAIT_PIDENTIFY(1*100)) / 2;
2719 timeout += jiffies;
2720 do {
2721 if (jiffies > timeout) {
2722 if (irqs_on)
2723 (void) probe_irq_off(irqs_on);
2724 return 1; /* drive timed-out */
2725 }
2726 delay_50ms(); /* give drive a breather */
2727 } while (IN_BYTE(hd_status)(byte)((__builtin_constant_p((hd_status)) && (hd_status
) < 256) ? __inbc_p(hd_status) : __inb_p(hd_status)) & BUSY_STAT0x80);
2728
2729 delay_50ms(); /* wait for IRQ and DRQ_STAT */
2730 if (OK_STAT(GET_STAT(),DRQ_STAT,BAD_R_STAT)((((byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->
hwif))->io_base+(7)))) && ((((ide_hwif_t *)((drive
)->hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))))&((0x08)|((0x80
| 0x01))))==(0x08))) {
2731 unsigned long flags;
2732 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
2733 cli()__asm__ __volatile__ ("cli": : :"memory"); /* some systems need this */
2734 do_identify(drive, cmd); /* drive returned ID */
2735 rc = 0; /* drive responded with ID */
2736 (void) GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))); /* clear drive IRQ */
2737 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
2738 } else
2739 rc = 2; /* drive refused ID */
2740 if (!HWIF(drive)((ide_hwif_t *)((drive)->hwif))->irq) {
2741 irq_off = probe_irq_off(irqs_on); /* get our irq number */
2742 if (irq_off > 0) {
2743 HWIF(drive)((ide_hwif_t *)((drive)->hwif))->irq = irq_off; /* save it for later */
2744 irqs_on = probe_irq_on();
2745 OUT_BYTE(drive->ctl|2,IDE_CONTROL_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
ctl_port)))) && (((((ide_hwif_t *)((drive)->hwif))
->ctl_port))) < 256) ? __outbc_p(((drive->ctl|2)),((
(((ide_hwif_t *)((drive)->hwif))->ctl_port)))) : __outb_p
(((drive->ctl|2)),(((((ide_hwif_t *)((drive)->hwif))->
ctl_port))))); /* mask device irq */
2746 udelay(5)(__builtin_constant_p(5) ? __const_udelay((5) * 0x10c6ul) : __udelay
(5));
2747 (void) probe_irq_off(irqs_on);
2748 (void) probe_irq_off(probe_irq_on()); /* clear self-inflicted irq */
2749 (void) GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))); /* clear drive IRQ */
2750
2751 } else { /* Mmmm.. multiple IRQs.. don't know which was ours */
2752 printk("%s: IRQ probe failed (%d)\n", drive->name, irq_off);
2753#ifdef CONFIG_BLK_DEV_CMD640
2754#ifdef CMD640_DUMP_REGS
2755 if (HWIF(drive)((ide_hwif_t *)((drive)->hwif))->chipset == ide_cmd640) {
2756 printk("%s: Hmmm.. probably a driver problem.\n", drive->name);
2757 CMD640_DUMP_REGS;
2758 }
2759#endif /* CMD640_DUMP_REGS */
2760#endif /* CONFIG_BLK_DEV_CMD640 */
2761 }
2762 }
2763 return rc;
2764}
2765
2766/*
2767 * do_probe() has the difficult job of finding a drive if it exists,
2768 * without getting hung up if it doesn't exist, without trampling on
2769 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
2770 *
2771 * If a drive is "known" to exist (from CMOS or kernel parameters),
2772 * but does not respond right away, the probe will "hang in there"
2773 * for the maximum wait time (about 30 seconds), otherwise it will
2774 * exit much more quickly.
2775 *
2776 * Returns: 0 device was identified
2777 * 1 device timed-out (no response to identify request)
2778 * 2 device aborted the command (refused to identify itself)
2779 * 3 bad status from device (possible for ATAPI drives)
2780 * 4 probe was not attempted because failure was obvious
2781 */
2782static int do_probe (ide_drive_t *drive, byte cmd)
2783{
2784 int rc;
2785 ide_hwif_t *hwif = HWIF(drive)((ide_hwif_t *)((drive)->hwif));
2786 unsigned long timeout;
2787#ifdef CONFIG_BLK_DEV_IDEATAPI1
2788 if (drive->present) { /* avoid waiting for inappropriate probes */
2789 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY0xEC))
2790 return 4;
2791 }
2792#endif /* CONFIG_BLK_DEV_IDEATAPI */
2793#ifdef DEBUG
2794 printk("probing for %s: present=%d, media=%d, probetype=%s\n",
2795 drive->name, drive->present, drive->media,
2796 (cmd == WIN_IDENTIFY0xEC) ? "ATA" : "ATAPI");
2797#endif
2798 SELECT_DRIVE(hwif,drive)((__builtin_constant_p(((hwif->io_base+(6)))) && (
(hwif->io_base+(6))) < 256) ? __outbc_p((((drive)->select
.all)),((hwif->io_base+(6)))) : __outb_p((((drive)->select
.all)),((hwif->io_base+(6)))));;
2799 delay_50ms();
2800 if (IN_BYTE(IDE_SELECT_REG)(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(6)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(6))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(6))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(6)))) != drive->select.all && !drive->present) {
2801 OUT_BYTE(0xa0,IDE_SELECT_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(6))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(6)))) < 256) ? __outbc_p(((0xa0)),(((((ide_hwif_t
*)((drive)->hwif))->io_base+(6))))) : __outb_p(((0xa0)
),(((((ide_hwif_t *)((drive)->hwif))->io_base+(6)))))); /* exit with drive0 selected */
2802 delay_50ms(); /* allow BUSY_STAT to assert & clear */
2803 return 3; /* no i/f present: avoid killing ethernet cards */
2804 }
2805
2806 if (OK_STAT(GET_STAT(),READY_STAT,BUSY_STAT)((((byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->
hwif))->io_base+(7)))) && ((((ide_hwif_t *)((drive
)->hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))))&((0x40)|(0x80)
))==(0x40))
2807 || drive->present || cmd == WIN_PIDENTIFY0xA1)
2808 {
2809 if ((rc = try_to_identify(drive,cmd))) /* send cmd and wait */
2810 rc = try_to_identify(drive,cmd); /* failed: try again */
2811 if (rc == 1 && cmd == WIN_PIDENTIFY0xA1 && drive->autotune != 2) {
2812 printk("%s: no response (status = 0x%02x), resetting drive\n", drive->name, GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))));
2813 delay_50ms();
2814 OUT_BYTE (drive->select.all, IDE_SELECT_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(6))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(6)))) < 256) ? __outbc_p(((drive->select
.all)),(((((ide_hwif_t *)((drive)->hwif))->io_base+(6))
))) : __outb_p(((drive->select.all)),(((((ide_hwif_t *)((drive
)->hwif))->io_base+(6))))));
2815 delay_50ms();
2816 OUT_BYTE(WIN_SRST, IDE_COMMAND_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(7))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) < 256) ? __outbc_p(((0x08)),(((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))))) : __outb_p(((0x08)
),(((((ide_hwif_t *)((drive)->hwif))->io_base+(7))))));
2817 timeout = jiffies;
2818 while ((GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))) & BUSY_STAT0x80) && jiffies < timeout + WAIT_WORSTCASE(30*100))
2819 delay_50ms();
2820 rc = try_to_identify(drive, cmd);
2821 }
2822 if (rc == 1)
2823 printk("%s: no response (status = 0x%02x)\n", drive->name, GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))));
2824 (void) GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))); /* ensure drive irq is clear */
2825 } else {
2826 rc = 3; /* not present or maybe ATAPI */
2827 }
2828 if (drive->select.b.unit != 0) {
2829 OUT_BYTE(0xa0,IDE_SELECT_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(6))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(6)))) < 256) ? __outbc_p(((0xa0)),(((((ide_hwif_t
*)((drive)->hwif))->io_base+(6))))) : __outb_p(((0xa0)
),(((((ide_hwif_t *)((drive)->hwif))->io_base+(6)))))); /* exit with drive0 selected */
2830 delay_50ms();
2831 (void) GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))); /* ensure drive irq is clear */
2832 }
2833 return rc;
2834}
2835
2836static void enable_nest (ide_drive_t *drive)
2837{
2838 unsigned long timeout;
2839
2840 printk("%s: enabling %s -- ", HWIF(drive)((ide_hwif_t *)((drive)->hwif))->name, drive->id->model);
2841 SELECT_DRIVE(HWIF(drive), drive)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif))->
io_base+(6)))) && ((((ide_hwif_t *)((drive)->hwif)
)->io_base+(6))) < 256) ? __outbc_p((((drive)->select
.all)),((((ide_hwif_t *)((drive)->hwif))->io_base+(6)))
) : __outb_p((((drive)->select.all)),((((ide_hwif_t *)((drive
)->hwif))->io_base+(6)))));;
2842 delay_50ms();
2843 OUT_BYTE(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG)((__builtin_constant_p((((((ide_hwif_t *)((drive)->hwif))->
io_base+(7))))) && (((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) < 256) ? __outbc_p(((0xf0)),(((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))))) : __outb_p(((0xf0)
),(((((ide_hwif_t *)((drive)->hwif))->io_base+(7))))));
2844 timeout = jiffies + WAIT_WORSTCASE(30*100);
2845 do {
2846 if (jiffies > timeout) {
2847 printk("failed (timeout)\n");
2848 return;
2849 }
2850 delay_50ms();
2851 } while (GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))) & BUSY_STAT0x80);
2852 delay_50ms();
2853 if (!OK_STAT(GET_STAT(), 0, BAD_STAT)((((byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->
hwif))->io_base+(7)))) && ((((ide_hwif_t *)((drive
)->hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))))&((0)|(((0x80 |
0x01) | 0x08))))==(0)))
2854 printk("failed (status = 0x%02x)\n", GET_STAT()(byte)((__builtin_constant_p(((((ide_hwif_t *)((drive)->hwif
))->io_base+(7)))) && ((((ide_hwif_t *)((drive)->
hwif))->io_base+(7))) < 256) ? __inbc_p((((ide_hwif_t *
)((drive)->hwif))->io_base+(7))) : __inb_p((((ide_hwif_t
*)((drive)->hwif))->io_base+(7)))));
2855 else
2856 printk("success\n");
2857 if (do_probe(drive, WIN_IDENTIFY0xEC) >= 2) { /* if !(success||timed-out) */
2858#ifdef CONFIG_BLK_DEV_IDEATAPI1
2859 (void) do_probe(drive, WIN_PIDENTIFY0xA1); /* look for ATAPI device */
2860#endif /* CONFIG_BLK_DEV_IDEATAPI */
2861 }
2862}
2863
2864/*
2865 * probe_for_drive() tests for existence of a given drive using do_probe().
2866 *
2867 * Returns: 0 no device was found
2868 * 1 device was found (note: drive->present might still be 0)
2869 */
2870static inlineinline __attribute__((always_inline)) byte probe_for_drive (ide_drive_t *drive)
2871{
2872 if (drive->noprobe) /* skip probing? */
2873 return drive->present;
2874 if (do_probe(drive, WIN_IDENTIFY0xEC) >= 2) { /* if !(success||timed-out) */
2875#ifdef CONFIG_BLK_DEV_IDEATAPI1
2876 (void) do_probe(drive, WIN_PIDENTIFY0xA1); /* look for ATAPI device */
2877#endif /* CONFIG_BLK_DEV_IDEATAPI */
2878 }
2879 if (drive->id && strstr((char *)drive->id->model, "E X A B Y T E N E S T"))
2880 enable_nest(drive);
2881 if (!drive->present)
2882 return 0; /* drive not found */
2883 if (drive->id == NULL((void *) 0)) { /* identification failed? */
2884 if (drive->media == ide_disk) {
2885 printk ("%s: non-IDE drive, CHS=%d/%d/%d\n",
2886 drive->name, drive->cyl, drive->head, drive->sect);
2887 }
2888#ifdef CONFIG_BLK_DEV_IDECD1
2889 else if (drive->media == ide_cdrom) {
2890 printk("%s: ATAPI cdrom (?)\n", drive->name);
2891 }
2892#endif /* CONFIG_BLK_DEV_IDECD */
2893 else {
2894 drive->present = 0; /* nuke it */
2895 }
2896 }
2897 return 1; /* drive was found */
2898}
2899
2900/*
2901 * We query CMOS about hard disks : it could be that we have a SCSI/ESDI/etc
2902 * controller that is BIOS compatible with ST-506, and thus showing up in our
2903 * BIOS table, but not register compatible, and therefore not present in CMOS.
2904 *
2905 * Furthermore, we will assume that our ST-506 drives <if any> are the primary
2906 * drives in the system -- the ones reflected as drive 1 or 2. The first
2907 * drive is stored in the high nibble of CMOS byte 0x12, the second in the low
2908 * nibble. This will be either a 4 bit drive type or 0xf indicating use byte
2909 * 0x19 for an 8 bit type, drive 1, 0x1a for drive 2 in CMOS. A non-zero value
2910 * means we have an AT controller hard disk for that drive.
2911 *
2912 * Of course, there is no guarantee that either drive is actually on the
2913 * "primary" IDE interface, but we don't bother trying to sort that out here.
2914 * If a drive is not actually on the primary interface, then these parameters
2915 * will be ignored. This results in the user having to supply the logical
2916 * drive geometry as a boot parameter for each drive not on the primary i/f.
2917 *
2918 * The only "perfect" way to handle this would be to modify the setup.[cS] code
2919 * to do BIOS calls Int13h/Fn08h and Int13h/Fn48h to get all of the drive info
2920 * for us during initialization. I have the necessary docs -- any takers? -ml
2921 */
2922static void probe_cmos_for_drives (ide_hwif_t *hwif)
2923{
2924#ifdef __i386__1
2925 extern struct drive_info_struct drive_info;
2926 byte cmos_disks, *BIOS = (byte *) &drive_info;
2927 int unit;
2928
2929#ifdef CONFIG_BLK_DEV_PROMISE
2930 if (hwif->is_promise2)
2931 return;
2932#endif /* CONFIG_BLK_DEV_PROMISE */
2933 outb_p(0x12,0x70)((__builtin_constant_p((0x70)) && (0x70) < 256) ? __outbc_p
((0x12),(0x70)) : __outb_p((0x12),(0x70))); /* specify CMOS address 0x12 */
2934 cmos_disks = inb_p(0x71)((__builtin_constant_p((0x71)) && (0x71) < 256) ? __inbc_p
(0x71) : __inb_p(0x71)); /* read the data from 0x12 */
2935 /* Extract drive geometry from CMOS+BIOS if not already setup */
2936 for (unit = 0; unit < MAX_DRIVES2; ++unit) {
2937 ide_drive_t *drive = &hwif->drives[unit];
2938 if ((cmos_disks & (0xf0 >> (unit*4))) && !drive->present && !drive->nobios) {
2939 unsigned short cyl = *(unsigned short *)BIOS;
2940 unsigned char head = *(BIOS+2);
2941 unsigned char sect = *(BIOS+14);
2942 unsigned char ctl = *(BIOS+8);
2943 if (cyl > 0 && head > 0 && sect > 0 && sect < 64) {
2944 drive->cyl = drive->bios_cyl = cyl;
2945 drive->head = drive->bios_head = head;
2946 drive->sect = drive->bios_sect = sect;
2947 drive->ctl = ctl;
2948 drive->present = 1;
2949 printk("hd%d: got CHS=%d/%d/%d CTL=%x from BIOS\n",
2950 unit, cyl, head, sect, ctl);
2951
2952 } else {
2953 printk("hd%d: CHS=%d/%d/%d CTL=%x from BIOS ignored\n",
2954 unit, cyl, head, sect, ctl);
2955 }
2956 }
2957 BIOS += 16;
2958 }
2959#endif
2960}
2961
2962/*
2963 * This routine only knows how to look for drive units 0 and 1
2964 * on an interface, so any setting of MAX_DRIVES > 2 won't work here.
2965 */
2966static void probe_hwif (ide_hwif_t *hwif)
2967{
2968 unsigned int unit;
2969
2970 if (hwif->noprobe)
2971 return;
2972 if (hwif->io_base == HD_DATA0x1f0)
2973 probe_cmos_for_drives (hwif);
2974#if CONFIG_BLK_DEV_PROMISE
2975 if (!hwif->is_promise2 &&
2976 (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1))) {
2977#else
2978 if (check_region(hwif->io_base,8) || check_region(hwif->ctl_port,1)) {
2979#endif /* CONFIG_BLK_DEV_PROMISE */
2980 int msgout = 0;
2981 for (unit = 0; unit < MAX_DRIVES2; ++unit) {
2982 ide_drive_t *drive = &hwif->drives[unit];
2983 if (drive->present) {
2984 drive->present = 0;
2985 printk("%s: ERROR, PORTS ALREADY IN USE\n", drive->name);
2986 msgout = 1;
2987 }
2988 }
2989 if (!msgout)
2990 printk("%s: ports already in use, skipping probe\n", hwif->name);
2991 } else {
2992 unsigned long flags;
2993 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
2994
2995 sti()__asm__ __volatile__ ("sti": : :"memory"); /* needed for jiffies and irq probing */
2996 /*
2997 * Second drive should only exist if first drive was found,
2998 * but a lot of cdrom drives are configured as single slaves.
2999 */
3000 for (unit = 0; unit < MAX_DRIVES2; ++unit) {
3001 ide_drive_t *drive = &hwif->drives[unit];
3002 (void) probe_for_drive (drive);
3003 if (drive->present && drive->media == ide_disk) {
3004 if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
3005 printk("%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n",
3006 drive->name, drive->head);
3007 drive->present = 0;
3008 }
3009 }
3010 if (drive->present && !hwif->present) {
3011 hwif->present = 1;
3012 request_region(hwif->io_base, 8, hwif->name);
3013 request_region(hwif->ctl_port, 1, hwif->name);
3014 }
3015 }
3016 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
3017 for (unit = 0; unit < MAX_DRIVES2; ++unit) {
3018 ide_drive_t *drive = &hwif->drives[unit];
3019 if (drive->present && drive->media != ide_tape) {
3020 ide_tuneproc_t *tuneproc = HWIF(drive)((ide_hwif_t *)((drive)->hwif))->tuneproc;
3021 if (tuneproc != NULL((void *) 0) && drive->autotune == 1)
3022 tuneproc(drive, 255); /* auto-tune PIO mode */
3023 }
3024 }
3025 }
3026}
3027
3028/*
3029 * stridx() returns the offset of c within s,
3030 * or -1 if c is '\0' or not found within s.
3031 */
3032static int stridx (const char *s, char c)
3033{
3034 char *i = strchr(s, c);
3035 return (i && c) ? i - s : -1;
3036}
3037
3038/*
3039 * match_parm() does parsing for ide_setup():
3040 *
3041 * 1. the first char of s must be '='.
3042 * 2. if the remainder matches one of the supplied keywords,
3043 * the index (1 based) of the keyword is negated and returned.
3044 * 3. if the remainder is a series of no more than max_vals numbers
3045 * separated by commas, the numbers are saved in vals[] and a
3046 * count of how many were saved is returned. Base10 is assumed,
3047 * and base16 is allowed when prefixed with "0x".
3048 * 4. otherwise, zero is returned.
3049 */
3050static int match_parm (char *s, const char *keywords[], int vals[], int max_vals)
3051{
3052 static const char *decimal = "0123456789";
3053 static const char *hex = "0123456789abcdef";
3054 int i, n;
3055
3056 if (*s++ == '=') {
3057 /*
3058 * Try matching against the supplied keywords,
3059 * and return -(index+1) if we match one
3060 */
3061 if (keywords != NULL((void *) 0)) {
3062 for (i = 0; *keywords != NULL((void *) 0); ++i) {
3063 if (!strcmp(s, *keywords++))
3064 return -(i+1);
3065 }
3066 }
3067 /*
3068 * Look for a series of no more than "max_vals"
3069 * numeric values separated by commas, in base10,
3070 * or base16 when prefixed with "0x".
3071 * Return a count of how many were found.
3072 */
3073 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
3074 vals[n] = i;
3075 while ((i = stridx(decimal, *++s)) >= 0)
3076 vals[n] = (vals[n] * 10) + i;
3077 if (*s == 'x' && !vals[n]) {
3078 while ((i = stridx(hex, *++s)) >= 0)
3079 vals[n] = (vals[n] * 0x10) + i;
3080 }
3081 if (++n == max_vals)
3082 break;
3083 if (*s == ',')
3084 ++s;
3085 }
3086 if (!*s)
3087 return n;
3088 }
3089 return 0; /* zero = nothing matched */
3090}
3091
3092/*
3093 * ide_setup() gets called VERY EARLY during initialization,
3094 * to handle kernel "command line" strings beginning with "hdx="
3095 * or "ide". Here is the complete set currently supported:
3096 *
3097 * "hdx=" is recognized for all "x" from "a" to "h", such as "hdc".
3098 * "idex=" is recognized for all "x" from "0" to "3", such as "ide1".
3099 *
3100 * "hdx=noprobe" : drive may be present, but do not probe for it
3101 * "hdx=none" : drive is NOT present, ignore cmos and do not probe
3102 * "hdx=nowerr" : ignore the WRERR_STAT bit on this drive
3103 * "hdx=cdrom" : drive is present, and is a cdrom drive
3104 * "hdx=cyl,head,sect" : disk drive is present, with specified geometry
3105 * "hdx=autotune" : driver will attempt to tune interface speed
3106 * to the fastest PIO mode supported,
3107 * if possible for this drive only.
3108 * Not fully supported by all chipset types,
3109 * and quite likely to cause trouble with
3110 * older/odd IDE drives.
3111 *
3112 * "idebus=xx" : inform IDE driver of VESA/PCI bus speed in Mhz,
3113 * where "xx" is between 20 and 66 inclusive,
3114 * used when tuning chipset PIO modes.
3115 * For PCI bus, 25 is correct for a P75 system,
3116 * 30 is correct for P90,P120,P180 systems,
3117 * and 33 is used for P100,P133,P166 systems.
3118 * If in doubt, use idebus=33 for PCI.
3119 * As for VLB, it is safest to not specify it.
3120 *
3121 * "idex=noprobe" : do not attempt to access/use this interface
3122 * "idex=base" : probe for an interface at the addr specified,
3123 * where "base" is usually 0x1f0 or 0x170
3124 * and "ctl" is assumed to be "base"+0x206
3125 * "idex=base,ctl" : specify both base and ctl
3126 * "idex=base,ctl,irq" : specify base, ctl, and irq number
3127 * "idex=autotune" : driver will attempt to tune interface speed
3128 * to the fastest PIO mode supported,
3129 * for all drives on this interface.
3130 * Not fully supported by all chipset types,
3131 * and quite likely to cause trouble with
3132 * older/odd IDE drives.
3133 * "idex=noautotune" : driver will NOT attempt to tune interface speed
3134 * This is the default for most chipsets,
3135 * except the cmd640.
3136 * "idex=serialize" : do not overlap operations on idex and ide(x^1)
3137 *
3138 * The following are valid ONLY on ide0,
3139 * and the defaults for the base,ctl ports must not be altered.
3140 *
3141 * "ide0=dtc2278" : probe/support DTC2278 interface
3142 * "ide0=ht6560b" : probe/support HT6560B interface
3143 * "ide0=cmd640_vlb" : *REQUIRED* for VLB cards with the CMD640 chip
3144 * (not for PCI -- automatically detected)
3145 * "ide0=qd6580" : probe/support qd6580 interface
3146 * "ide0=ali14xx" : probe/support ali14xx chipsets (ALI M1439, M1443, M1445)
3147 * "ide0=umc8672" : probe/support umc8672 chipsets
3148 */
3149void ide_setup (char *s)
3150{
3151 int i, vals[3];
3152 ide_hwif_t *hwif;
3153 ide_drive_t *drive;
3154 unsigned int hw, unit;
3155 const char max_drive = 'a' + ((MAX_HWIFS4 * MAX_DRIVES2) - 1);
3156 const char max_hwif = '0' + (MAX_HWIFS4 - 1);
3157
3158 printk("ide_setup: %s", s);
3159 init_ide_data ();
3160
3161 /*
3162 * Look for drive options: "hdx="
3163 */
3164 if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
3165 const char *hd_words[] = {"none", "noprobe", "nowerr", "cdrom",
3166 "serialize", "autotune", "noautotune",
3167 "slow", "ide-scsi", NULL((void *) 0)};
3168 unit = s[2] - 'a';
3169 hw = unit / MAX_DRIVES2;
3170 unit = unit % MAX_DRIVES2;
3171 hwif = &ide_hwifs[hw];
3172 drive = &hwif->drives[unit];
3173 switch (match_parm(&s[3], hd_words, vals, 3)) {
3174 case -1: /* "none" */
3175 drive->nobios = 1; /* drop into "noprobe" */
3176 case -2: /* "noprobe" */
3177 drive->noprobe = 1;
3178 goto done;
3179 case -3: /* "nowerr" */
3180 drive->bad_wstat = BAD_R_STAT(0x80 | 0x01);
3181 hwif->noprobe = 0;
3182 goto done;
3183 case -4: /* "cdrom" */
3184 drive->present = 1;
3185 drive->media = ide_cdrom;
3186 hwif->noprobe = 0;
3187 goto done;
3188 case -5: /* "serialize" */
3189 printk(" -- USE \"ide%d=serialize\" INSTEAD", hw);
3190 goto do_serialize;
3191 case -6: /* "autotune" */
3192 drive->autotune = 1;
3193 goto done;
3194 case -7: /* "noautotune" */
3195 drive->autotune = 2;
3196 goto done;
3197 case -8: /* "slow" */
3198 drive->slow = 1;
3199 goto done;
3200 case -9: /* "ide-scsi" */
3201 drive->ide_scsi = 1;
3202 goto done;
3203 case 3: /* cyl,head,sect */
3204 drive->media = ide_disk;
3205 drive->cyl = drive->bios_cyl = vals[0];
3206 drive->head = drive->bios_head = vals[1];
3207 drive->sect = drive->bios_sect = vals[2];
3208 drive->present = 1;
3209 drive->forced_geom = 1;
3210 hwif->noprobe = 0;
3211 goto done;
3212 default:
3213 goto bad_option;
3214 }
3215 }
3216
3217 if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
3218 goto bad_option;
3219 /*
3220 * Look for bus speed option: "idebus="
3221 */
3222 if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
3223 if (match_parm(&s[6], NULL((void *) 0), vals, 1) != 1)
3224 goto bad_option;
3225 if (vals[0] >= 20 && vals[0] <= 66)
3226 idebus_parameter = vals[0];
3227 else
3228 printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
3229 goto done;
3230 }
3231 /*
3232 * Look for interface options: "idex="
3233 */
3234 if (s[3] >= '0' && s[3] <= max_hwif) {
3235 /*
3236 * Be VERY CAREFUL changing this: note hardcoded indexes below
3237 */
3238 const char *ide_words[] = {"noprobe", "serialize", "autotune", "noautotune",
3239 "qd6580", "ht6560b", "cmd640_vlb", "dtc2278", "umc8672", "ali14xx", "dc4030", NULL((void *) 0)};
3240 hw = s[3] - '0';
3241 hwif = &ide_hwifs[hw];
3242 i = match_parm(&s[4], ide_words, vals, 3);
3243
3244 /*
3245 * Cryptic check to ensure chipset not already set for hwif:
3246 */
3247 if (i > 0 || i <= -5) {
3248 if (hwif->chipset != ide_unknown)
3249 goto bad_option;
3250 if (i <= -5) {
3251 if (ide_hwifs[1].chipset != ide_unknown)
3252 goto bad_option;
3253 /*
3254 * Interface keywords work only for ide0:
3255 */
3256 if (hw != 0)
3257 goto bad_hwif;
3258 }
3259 }
3260
3261 switch (i) {
3262#ifdef CONFIG_BLK_DEV_PROMISE
3263 case -11: /* "dc4030" */
3264 {
3265 setup_dc4030(hwif);
3266 goto done;
3267 }
3268#endif /* CONFIG_BLK_DEV_PROMISE */
3269#ifdef CONFIG_BLK_DEV_ALI14XX
3270 case -10: /* "ali14xx" */
3271 {
3272 extern void init_ali14xx (void);
3273 init_ali14xx();
3274 goto done;
3275 }
3276#endif /* CONFIG_BLK_DEV_ALI14XX */
3277#ifdef CONFIG_BLK_DEV_UMC8672
3278 case -9: /* "umc8672" */
3279 {
3280 extern void init_umc8672 (void);
3281 init_umc8672();
3282 goto done;
3283 }
3284#endif /* CONFIG_BLK_DEV_UMC8672 */
3285#ifdef CONFIG_BLK_DEV_DTC2278
3286 case -8: /* "dtc2278" */
3287 {
3288 extern void init_dtc2278 (void);
3289 init_dtc2278();
3290 goto done;
3291 }
3292#endif /* CONFIG_BLK_DEV_DTC2278 */
3293#ifdef CONFIG_BLK_DEV_CMD640
3294 case -7: /* "cmd640_vlb" */
3295 {
3296 extern int cmd640_vlb; /* flag for cmd640.c */
3297 cmd640_vlb = 1;
3298 goto done;
3299 }
3300#endif /* CONFIG_BLK_DEV_CMD640 */
3301#ifdef CONFIG_BLK_DEV_HT6560B
3302 case -6: /* "ht6560b" */
3303 {
3304 extern void init_ht6560b (void);
3305 init_ht6560b();
3306 goto done;
3307 }
3308#endif /* CONFIG_BLK_DEV_HT6560B */
3309#if CONFIG_BLK_DEV_QD6580
3310 case -5: /* "qd6580" (has secondary i/f) */
3311 {
3312 extern void init_qd6580 (void);
3313 init_qd6580();
3314 goto done;
3315 }
3316#endif /* CONFIG_BLK_DEV_QD6580 */
3317 case -4: /* "noautotune" */
3318 hwif->drives[0].autotune = 2;
3319 hwif->drives[1].autotune = 2;
3320 goto done;
3321 case -3: /* "autotune" */
3322 hwif->drives[0].autotune = 1;
3323 hwif->drives[1].autotune = 1;
3324 goto done;
3325 case -2: /* "serialize" */
3326 do_serialize:
3327 ide_hwifs[hw].serialized = 1; /* serialize */
3328 ide_hwifs[hw^1].serialized = 1; /* with mate */
3329 goto done;
3330
3331 case -1: /* "noprobe" */
3332 hwif->noprobe = 1;
3333 goto done;
3334
3335 case 1: /* base */
3336 vals[1] = vals[0] + 0x206; /* default ctl */
3337 case 2: /* base,ctl */
3338 vals[2] = 0; /* default irq = probe for it */
3339 case 3: /* base,ctl,irq */
3340 hwif->io_base = vals[0];
3341 hwif->ctl_port = vals[1];
3342 hwif->irq = vals[2];
3343 hwif->noprobe = 0;
3344 hwif->chipset = ide_generic;
3345 goto done;
3346
3347 case 0: goto bad_option;
3348 default:
3349 printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
3350 return;
3351 }
3352 }
3353bad_option:
3354 printk(" -- BAD OPTION\n");
3355 return;
3356bad_hwif:
3357 printk("-- NOT SUPPORTED ON ide%d", hw);
3358done:
3359 printk("\n");
3360}
3361
3362/*
3363 * This routine is called from the partition-table code in genhd.c
3364 * to "convert" a drive to a logical geometry with fewer than 1024 cyls.
3365 *
3366 * The second parameter, "xparm", determines exactly how the translation
3367 * will be handled:
3368 * 0 = convert to CHS with fewer than 1024 cyls
3369 * using the same method as Ontrack DiskManager.
3370 * 1 = same as "0", plus offset everything by 63 sectors.
3371 * -1 = similar to "0", plus redirect sector 0 to sector 1.
3372 * >1 = convert to a CHS geometry with "xparm" heads.
3373 *
3374 * Returns 0 if the translation was not possible, if the device was not
3375 * an IDE disk drive, or if a geometry was "forced" on the commandline.
3376 * Returns 1 if the geometry translation was successful.
3377 */
3378
3379int ide_xlate_1024 (kdev_t i_rdev, int xparm, const char *msg)
3380{
3381 ide_drive_t *drive;
3382 static const byte head_vals[] = {4, 8, 16, 32, 64, 128, 255, 0};
3383 const byte *heads = head_vals;
3384 unsigned long tracks;
3385
3386 drive = get_info_ptr(i_rdev);
3387 if (!drive)
3388 return 0;
3389
3390 if (drive->forced_geom)
3391 return 0;
3392
3393 if (xparm > 1 && xparm <= drive->bios_head && drive->bios_sect == 63)
3394 return 0; /* we already have a translation */
3395
3396 printk("%s ", msg);
3397
3398 if (xparm < 0 && (drive->bios_cyl * drive->bios_head * drive->bios_sect) < (1024 * 16 * 63)) {
3399 return 0; /* small disk: no translation needed */
3400 }
3401
3402 if (drive->id) {
3403 drive->cyl = drive->id->cyls;
3404 drive->head = drive->id->heads;
3405 drive->sect = drive->id->sectors;
3406 }
3407 drive->bios_cyl = drive->cyl;
3408 drive->bios_head = drive->head;
3409 drive->bios_sect = drive->sect;
3410 drive->special.b.set_geometry = 1;
3411
3412 tracks = drive->bios_cyl * drive->bios_head * drive->bios_sect / 63;
3413 drive->bios_sect = 63;
3414 if (xparm > 1) {
3415 drive->bios_head = xparm;
3416 drive->bios_cyl = tracks / drive->bios_head;
3417 } else {
3418 while (drive->bios_cyl >= 1024) {
3419 drive->bios_head = *heads;
3420 drive->bios_cyl = tracks / drive->bios_head;
3421 if (0 == *++heads)
3422 break;
3423 }
3424#if FAKE_FDISK_FOR_EZDRIVE1
3425 if (xparm == -1) {
3426 drive->remap_0_to_1 = 1;
3427 msg = "0->1";
3428 } else
3429#endif /* FAKE_FDISK_FOR_EZDRIVE */
3430 if (xparm == 1) {
3431 drive->sect0 = 63;
3432 drive->bios_cyl = (tracks - 1) / drive->bios_head;
3433 msg = "+63";
3434 }
3435 printk("[remap %s] ", msg);
3436 }
3437 drive->part[0].nr_sects = current_capacity(drive);
3438 printk("[%d/%d/%d]", drive->bios_cyl, drive->bios_head, drive->bios_sect);
3439 return 1;
3440}
3441
3442#if MAX_HWIFS4 > 1
3443/*
3444 * save_match() is used to simplify logic in init_irq() below.
3445 *
3446 * A loophole here is that we may not know about a particular
3447 * hwif's irq until after that hwif is actually probed/initialized..
3448 * This could be a problem for the case where an hwif is on a
3449 * dual interface that requires serialization (eg. cmd640) and another
3450 * hwif using one of the same irqs is initialized beforehand.
3451 *
3452 * This routine detects and reports such situations, but does not fix them.
3453 */
3454static void save_match (ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
3455{
3456 ide_hwif_t *m = *match;
3457
3458 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
3459 if (!new->hwgroup)
3460 return;
3461 printk("%s: potential irq problem with %s and %s\n", hwif->name, new->name, m->name);
3462 }
3463 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
3464 *match = new;
3465}
3466#endif /* MAX_HWIFS > 1 */
3467
3468/*
3469 * This routine sets up the irq for an ide interface, and creates a new
3470 * hwgroup for the irq/hwif if none was previously assigned.
3471 *
3472 * Much of the code is for correctly detecting/handling irq sharing
3473 * and irq serialization situations. This is somewhat complex because
3474 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
3475 *
3476 * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with
3477 * interrupts completely disabled. This can be bad for interrupt latency,
3478 * but anything else has led to problems on some machines. We re-enable
3479 * interrupts as much as we can safely do in most places.
3480 */
3481static int init_irq (ide_hwif_t *hwif)
3482{
3483 unsigned long flags;
3484#if MAX_HWIFS4 > 1
3485 unsigned int index;
3486#endif /* MAX_HWIFS > 1 */
3487 ide_hwgroup_t *hwgroup;
3488 ide_hwif_t *match = NULL((void *) 0);
3489
3490 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
3491 cli()__asm__ __volatile__ ("cli": : :"memory");
3492
3493 hwif->hwgroup = NULL((void *) 0);
3494#if MAX_HWIFS4 > 1
3495 /*
3496 * Group up with any other hwifs that share our irq(s).
3497 */
3498 for (index = 0; index < MAX_HWIFS4; index++) {
3499 ide_hwif_t *h = &ide_hwifs[index];
3500 if (h->hwgroup) { /* scan only initialized hwif's */
3501 if (hwif->irq == h->irq) {
3502 hwif->sharing_irq = h->sharing_irq = 1;
3503 save_match(hwif, h, &match);
3504 }
3505 if (hwif->serialized) {
3506 ide_hwif_t *mate = &ide_hwifs[hwif->index^1];
3507 if (index == mate->index || h->irq == mate->irq)
3508 save_match(hwif, h, &match);
3509 }
3510 if (h->serialized) {
3511 ide_hwif_t *mate = &ide_hwifs[h->index^1];
3512 if (hwif->irq == mate->irq)
3513 save_match(hwif, h, &match);
3514 }
3515 }
3516 }
3517#endif /* MAX_HWIFS > 1 */
3518 /*
3519 * If we are still without a hwgroup, then form a new one
3520 */
3521 if (match) {
3522 hwgroup = match->hwgroup;
3523 } else {
3524 hwgroup = kmalloclinux_kmalloc(sizeof(ide_hwgroup_t), GFP_KERNEL0x03);
3525 hwgroup->hwif = hwgroup->next_hwif = hwif->next = hwif;
3526 hwgroup->rq = NULL((void *) 0);
3527 hwgroup->handler = NULL((void *) 0);
3528 if (hwif->drives[0].present)
3529 hwgroup->drive = &hwif->drives[0];
3530 else
3531 hwgroup->drive = &hwif->drives[1];
3532 hwgroup->poll_timeout = 0;
3533 hwgroup->active = 0;
3534 init_timer(&hwgroup->timer);
3535 hwgroup->timer.function = &timer_expiry;
3536 hwgroup->timer.data = (unsigned long) hwgroup;
3537 }
3538
3539 /*
3540 * Allocate the irq, if not already obtained for another hwif
3541 */
3542 if (!match || match->irq != hwif->irq) {
3543 if (request_irq(hwif->irq, ide_intr, SA_INTERRUPT0x20000000, hwif->name, hwgroup)) {
3544 if (!match)
3545 kfreelinux_kfree(hwgroup);
3546 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
3547 return 1;
3548 }
3549 }
3550
3551 /*
3552 * Everything is okay, so link us into the hwgroup
3553 */
3554 hwif->hwgroup = hwgroup;
3555 hwif->next = hwgroup->hwif->next;
3556 hwgroup->hwif->next = hwif;
3557
3558 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory"); /* safe now that hwif->hwgroup is set up */
3559
3560 printk("%s at 0x%03x-0x%03x,0x%03x on irq %d", hwif->name,
3561 hwif->io_base, hwif->io_base+7, hwif->ctl_port, hwif->irq);
3562 if (match)
3563 printk(" (%sed with %s)", hwif->sharing_irq ? "shar" : "serializ", match->name);
3564 printk("\n");
3565 return 0;
3566}
3567
3568static struct file_operations ide_fops = {
3569 NULL((void *) 0), /* lseek - default */
3570 block_read, /* read - general block-dev read */
3571 block_write, /* write - general block-dev write */
3572 NULL((void *) 0), /* readdir - bad */
3573 NULL((void *) 0), /* select */
3574 ide_ioctl, /* ioctl */
3575 NULL((void *) 0), /* mmap */
3576 ide_open, /* open */
3577 ide_release, /* release */
3578 block_fsync /* fsync */
3579 ,NULL((void *) 0), /* fasync */
3580 ide_check_media_change, /* check_media_change */
3581 revalidate_disk /* revalidate */
3582};
3583
3584#ifdef CONFIG_PCI1
3585#if defined(CONFIG_BLK_DEV_RZ10001) || defined(CONFIG_BLK_DEV_TRITON1)
3586
3587typedef void (ide_pci_init_proc_t)(byte, byte);
3588
3589/*
3590 * ide_probe_pci() scans PCI for a specific vendor/device function,
3591 * and invokes the supplied init routine for each instance detected.
3592 */
3593static void ide_probe_pci (unsigned short vendor, unsigned short device, ide_pci_init_proc_t *init, int func_adj)
3594{
3595 unsigned long flags;
3596 unsigned index;
3597 byte fn, bus;
3598
3599 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
3600 cli()__asm__ __volatile__ ("cli": : :"memory");
3601 for (index = 0; !pcibios_find_device (vendor, device, index, &bus, &fn); ++index) {
3602 init (bus, fn + func_adj);
3603 }
3604 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
3605}
3606
3607#endif /* defined(CONFIG_BLK_DEV_RZ1000) || defined(CONFIG_BLK_DEV_TRITON) */
3608
3609static void ide_probe_promise_20246(void)
3610{
3611 byte fn, bus;
3612 unsigned short io[6], count = 0;
3613 unsigned int reg, tmp, i;
3614 ide_hwif_t *hwif;
3615
3616 memset(io, 0, 6 * sizeof(unsigned short))(__builtin_constant_p(0) ? (__builtin_constant_p((6 * sizeof(
unsigned short))) ? __constant_c_and_count_memset(((io)),((0x01010101UL
*(unsigned char)(0))),((6 * sizeof(unsigned short)))) : __constant_c_memset
(((io)),((0x01010101UL*(unsigned char)(0))),((6 * sizeof(unsigned
short))))) : (__builtin_constant_p((6 * sizeof(unsigned short
))) ? __memset_generic((((io))),(((0))),(((6 * sizeof(unsigned
short))))) : __memset_generic(((io)),((0)),((6 * sizeof(unsigned
short))))));
3617 if (pcibios_find_device(PCI_VENDOR_ID_PROMISE0x105a, PCI_DEVICE_ID_PROMISE_202460x4d33, 0, &bus, &fn))
3618 return;
3619 printk("ide: Promise Technology IDE Ultra-DMA 33 on PCI bus %d function %d\n", bus, fn);
3620 for (reg = PCI_BASE_ADDRESS_00x10; reg <= PCI_BASE_ADDRESS_50x24; reg += 4) {
3621 pcibios_read_config_dword(bus, fn, reg, &tmp);
3622 if (tmp & PCI_BASE_ADDRESS_SPACE_IO0x01)
3623 io[count++] = tmp & PCI_BASE_ADDRESS_IO_MASK(~0x03);
3624 }
3625 for (i = 2; i < 4; i++) {
3626 hwif = ide_hwifs + i;
3627 if (hwif->chipset == ide_generic) {
3628 printk("ide%d: overridden with command line parameter\n", i);
3629 return;
3630 }
3631 tmp = (i - 2) * 2;
3632 if (!io[tmp] || !io[tmp + 1]) {
3633 printk("ide%d: invalid port address %x, %x -- aborting\n", i, io[tmp], io[tmp + 1]);
3634 return;
3635 }
3636 hwif->io_base = io[tmp];
3637 hwif->ctl_port = io[tmp + 1] + 2;
3638 hwif->noprobe = 0;
3639 }
3640}
3641
3642#endif /* CONFIG_PCI */
3643
3644/*
3645 * ide_init_pci() finds/initializes "known" PCI IDE interfaces
3646 *
3647 * This routine should ideally be using pcibios_find_class() to find
3648 * all IDE interfaces, but that function causes some systems to "go weird".
3649 */
3650static void probe_for_hwifs (void)
3651{
3652#ifdef CONFIG_PCI1
3653 /*
3654 * Find/initialize PCI IDE interfaces
3655 */
3656 if (pcibios_present()) {
3657#ifdef CONFIG_BLK_DEV_RZ10001
3658 ide_pci_init_proc_t init_rz1000;
3659 ide_probe_pci (PCI_VENDOR_ID_PCTECH0x1042, PCI_DEVICE_ID_PCTECH_RZ10000x1000, &init_rz1000, 0);
3660 ide_probe_pci (PCI_VENDOR_ID_PCTECH0x1042, PCI_DEVICE_ID_PCTECH_RZ10010x1001, &init_rz1000, 0);
3661#endif /* CONFIG_BLK_DEV_RZ1000 */
3662#ifdef CONFIG_BLK_DEV_TRITON1
3663 /*
3664 * Apparently the BIOS32 services on Intel motherboards are
3665 * buggy and won't find the PCI_DEVICE_ID_INTEL_82371_1 for us.
3666 * So instead, we search for PCI_DEVICE_ID_INTEL_82371_0,
3667 * and then add 1.
3668 */
3669 ide_probe_pci (PCI_VENDOR_ID_INTEL0x8086, PCI_DEVICE_ID_INTEL_82371_00x122e, &ide_init_triton, 1);
3670 ide_probe_pci (PCI_VENDOR_ID_INTEL0x8086, PCI_DEVICE_ID_INTEL_82371SB_10x7010, &ide_init_triton, 0);
3671 ide_probe_pci (PCI_VENDOR_ID_INTEL0x8086, PCI_DEVICE_ID_INTEL_82371AB0x7111, &ide_init_triton, 0);
3672 ide_probe_pci (PCI_VENDOR_ID_SI0x1039, PCI_DEVICE_ID_SI_55130x5513, &ide_init_triton, 0);
3673 ide_probe_pci (PCI_VENDOR_ID_VIA0x1106, PCI_DEVICE_ID_VIA_82C586_10x0571, &ide_init_triton, 0);
3674 ide_probe_pci (PCI_VENDOR_ID_AL0x10b9, PCI_DEVICE_ID_AL_M52290x5229, &ide_init_triton, 0);
3675#endif /* CONFIG_BLK_DEV_TRITON */
3676 ide_probe_promise_20246();
3677 }
3678#endif /* CONFIG_PCI */
3679#ifdef CONFIG_BLK_DEV_CMD640
3680 {
3681 extern void ide_probe_for_cmd640x (void);
3682 ide_probe_for_cmd640x();
3683 }
3684#endif
3685#ifdef CONFIG_BLK_DEV_PROMISE
3686 init_dc4030();
3687#endif
3688 ahci_probe_pci();
3689}
3690
3691static int hwif_init (int h)
3692{
3693 ide_hwif_t *hwif = &ide_hwifs[h];
3694 void (*rfn)(void);
3695
3696 if (!hwif->present)
3697 return 0;
3698 if (!hwif->irq) {
3699 if (!(hwif->irq = default_irqs[h])) {
3700 printk("%s: DISABLED, NO IRQ\n", hwif->name);
3701 return (hwif->present = 0);
3702 }
3703 }
3704#ifdef CONFIG_BLK_DEV_HD
3705 if (hwif->irq == HD_IRQ14 && hwif->io_base != HD_DATA0x1f0) {
3706 printk("%s: CANNOT SHARE IRQ WITH OLD HARDDISK DRIVER (hd.c)\n", hwif->name);
3707 return (hwif->present = 0);
3708 }
3709#endif /* CONFIG_BLK_DEV_HD */
3710
3711 hwif->present = 0; /* we set it back to 1 if all is ok below */
3712 switch (hwif->major) {
3713 case IDE0_MAJOR3: rfn = &do_ide0_request; break;
3714#if MAX_HWIFS4 > 1
3715 case IDE1_MAJOR22: rfn = &do_ide1_request; break;
3716#endif
3717#if MAX_HWIFS4 > 2
3718 case IDE2_MAJOR33: rfn = &do_ide2_request; break;
3719#endif
3720#if MAX_HWIFS4 > 3
3721 case IDE3_MAJOR34: rfn = &do_ide3_request; break;
3722#endif
3723 default:
3724 printk("%s: request_fn NOT DEFINED\n", hwif->name);
3725 return (hwif->present = 0);
3726 }
3727 if (register_blkdev (hwif->major, hwif->name, &ide_fops)) {
3728 printk("%s: UNABLE TO GET MAJOR NUMBER %d\n", hwif->name, hwif->major);
3729 } else if (init_irq (hwif)) {
3730 printk("%s: UNABLE TO GET IRQ %d\n", hwif->name, hwif->irq);
3731 (void) unregister_blkdev (hwif->major, hwif->name);
3732 } else {
3733 init_gendisk(hwif);
3734 blk_dev[hwif->major].request_fn = rfn;
3735 read_ahead[hwif->major] = 8; /* (4kB) */
3736 hwif->present = 1; /* success */
3737 }
3738 return hwif->present;
3739}
3740
3741/*
3742 * This is gets invoked once during initialization, to set *everything* up
3743 */
3744int ide_init (void)
3745{
3746 int index;
3747
3748 init_ide_data ();
3749 /*
3750 * Probe for special "known" interface chipsets
3751 */
3752 probe_for_hwifs ();
3753
3754 /*
3755 * Probe for drives in the usual way.. CMOS/BIOS, then poke at ports
3756 */
3757 for (index = 0; index < MAX_HWIFS4; ++index)
3758 probe_hwif (&ide_hwifs[index]);
3759 for (index = 0; index < MAX_HWIFS4; ++index)
3760 hwif_init (index);
3761
3762#ifdef CONFIG_BLK_DEV_IDETAPE
3763 idetape_register_chrdev(); /* Register character device interface to the ide tape */
3764#endif /* CONFIG_BLK_DEV_IDETAPE */
3765
3766 return 0;
3767}
3768
3769#ifdef CONFIG_BLK_DEV_IDE_PCMCIA
3770int ide_register(int io_base, int ctl_port, int irq)
3771{
3772 int index, i, rc = -1;
3773 ide_hwif_t *hwif;
3774 ide_drive_t *drive;
3775 unsigned long flags;
3776
3777 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
3778 cli()__asm__ __volatile__ ("cli": : :"memory");
3779 for (index = 0; index < MAX_HWIFS4; ++index) {
3780 hwif = &ide_hwifs[index];
3781 if (hwif->present) {
3782 if (hwif->io_base == io_base || hwif->ctl_port == ctl_port)
3783 break; /* this ide port already exists */
3784 } else {
3785 hwif->io_base = io_base;
3786 hwif->ctl_port = ctl_port;
3787 hwif->irq = irq;
3788 hwif->noprobe = 0;
3789 probe_hwif(hwif);
3790 if (!hwif_init(index))
3791 break;
3792 for (i = 0; i < hwif->gd->nr_real; i++) {
3793 drive = &hwif->drives[i];
3794 revalidate_disk(MKDEV(hwif->major, i<<PARTN_BITS)(((hwif->major) << 8) | (i<<6)));
3795#ifdef CONFIG_BLK_DEV_IDECD1
3796 if (drive->present && drive->media == ide_cdrom)
3797 ide_cdrom_setup(drive);
3798#endif /* CONFIG_BLK_DEV_IDECD */
3799 }
3800 rc = index;
3801 break;
3802 }
3803 }
3804 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
3805 return rc;
3806}
3807
3808void ide_unregister (unsigned int index)
3809{
3810 struct gendisk *gd, **gdp;
3811 ide_hwif_t *hwif, *g;
3812 ide_hwgroup_t *hwgroup;
3813 int irq_count = 0;
3814 unsigned long flags;
3815
3816 if (index >= MAX_HWIFS4)
3817 return;
3818 save_flags(flags)__asm__ __volatile__("pushf ; pop %0" : "=r" (flags): :"memory"
);
3819 cli()__asm__ __volatile__ ("cli": : :"memory");
3820 hwif = &ide_hwifs[index];
3821 if (!hwif->present || hwif->drives[0].busy || hwif->drives[1].busy) {
3822 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
3823 return;
3824 }
3825 hwif->present = 0;
3826 hwgroup = hwif->hwgroup;
3827
3828 /*
3829 * free the irq if we were the only hwif using it
3830 */
3831 g = hwgroup->hwif;
3832 do {
3833 if (g->irq == hwif->irq)
3834 ++irq_count;
3835 g = g->next;
3836 } while (g != hwgroup->hwif);
3837 if (irq_count == 1)
3838 free_irq(hwif->irq, hwgroup);
3839
3840 /*
3841 * Note that we only release the standard ports,
3842 * and do not even try to handle any extra ports
3843 * allocated for weird IDE interface chipsets.
3844 */
3845 release_region(hwif->io_base, 8);
3846 release_region(hwif->ctl_port, 1);
3847
3848 /*
3849 * Remove us from the hwgroup, and free
3850 * the hwgroup if we were the only member
3851 */
3852 while (hwgroup->hwif->next != hwif)
3853 hwgroup->hwif = hwgroup->hwif->next;
3854 hwgroup->hwif->next = hwif->next;
3855 if (hwgroup->hwif == hwif)
3856 hwgroup->hwif = hwif->next;
3857 if (hwgroup->next_hwif == hwif)
3858 hwgroup->next_hwif = hwif->next;
3859 if (hwgroup->hwif == hwif)
3860 kfreelinux_kfree(hwgroup);
3861
3862 /*
3863 * Remove us from the kernel's knowledge
3864 */
3865 unregister_blkdev(hwif->major, hwif->name);
3866 kfreelinux_kfree(blksize_size[hwif->major]);
3867 blk_dev[hwif->major].request_fn = NULL((void *) 0);
3868 blksize_size[hwif->major] = NULL((void *) 0);
3869 for (gdp = &gendisk_head; *gdp; gdp = &((*gdp)->next))
3870 if (*gdp == hwif->gd)
3871 break;
3872 if (*gdp == NULL((void *) 0))
3873 printk("gd not in disk chain!\n");
3874 else {
3875 gd = *gdp; *gdp = gd->next;
3876 kfreelinux_kfree(gd->sizes);
3877 kfreelinux_kfree(gd->part);
3878 kfreelinux_kfree(gd);
3879 }
3880 init_hwif_data (index); /* restore hwif data to pristine status */
3881 restore_flags(flags)__asm__ __volatile__("push %0 ; popf": :"g" (flags):"memory");
3882}
3883#endif /* CONFIG_BLK_DEV_IDE_PCMCIA */