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ext3: validate directory entry data before use
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / ide.h
blobb846bc44a27ed62a62c6c30cf69ed2897579e7f1
1 #ifndef _IDE_H
2 #define _IDE_H
3 /*
4 * linux/include/linux/ide.h
5 *
6 * Copyright (C) 1994-2002 Linus Torvalds & authors
7 */
8
9 #include <linux/init.h>
10 #include <linux/ioport.h>
11 #include <linux/hdreg.h>
12 #include <linux/blkdev.h>
13 #include <linux/proc_fs.h>
14 #include <linux/interrupt.h>
15 #include <linux/bitops.h>
16 #include <linux/bio.h>
17 #include <linux/device.h>
18 #include <linux/pci.h>
19 #include <linux/completion.h>
20 #ifdef CONFIG_BLK_DEV_IDEACPI
21 #include <acpi/acpi.h>
22 #endif
23 #include <asm/byteorder.h>
24 #include <asm/system.h>
25 #include <asm/io.h>
26 #include <asm/mutex.h>
27
28 #if defined(CONFIG_CRIS) || defined(CONFIG_FRV)
29 # define SUPPORT_VLB_SYNC 0
30 #else
31 # define SUPPORT_VLB_SYNC 1
32 #endif
33
34 /*
35 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
36 * number.
37 */
38
39 #define IDE_NO_IRQ (-1)
40
41 typedef unsigned char byte; /* used everywhere */
42
43 /*
44 * Probably not wise to fiddle with these
45 */
46 #define ERROR_MAX 8 /* Max read/write errors per sector */
47 #define ERROR_RESET 3 /* Reset controller every 4th retry */
48 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
49
50 /*
51 * state flags
52 */
53
54 #define DMA_PIO_RETRY 1 /* retrying in PIO */
55
56 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
57 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
58
59 /*
60 * Definitions for accessing IDE controller registers
61 */
62 #define IDE_NR_PORTS (10)
63
64 struct ide_io_ports {
65 unsigned long data_addr;
66
67 union {
68 unsigned long error_addr; /* read: error */
69 unsigned long feature_addr; /* write: feature */
70 };
71
72 unsigned long nsect_addr;
73 unsigned long lbal_addr;
74 unsigned long lbam_addr;
75 unsigned long lbah_addr;
76
77 unsigned long device_addr;
78
79 union {
80 unsigned long status_addr; /*  read: status  */
81 unsigned long command_addr; /* write: command */
82 };
83
84 unsigned long ctl_addr;
85
86 unsigned long irq_addr;
87 };
88
89 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
90 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
91 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
92 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
93 #define DRIVE_READY (READY_STAT | SEEK_STAT)
94
95 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
96
97 #define SATA_NR_PORTS (3) /* 16 possible ?? */
98
99 #define SATA_STATUS_OFFSET (0)
100 #define SATA_ERROR_OFFSET (1)
101 #define SATA_CONTROL_OFFSET (2)
102
103 /*
104 * Our Physical Region Descriptor (PRD) table should be large enough
105 * to handle the biggest I/O request we are likely to see. Since requests
106 * can have no more than 256 sectors, and since the typical blocksize is
107 * two or more sectors, we could get by with a limit of 128 entries here for
108 * the usual worst case. Most requests seem to include some contiguous blocks,
109 * further reducing the number of table entries required.
110 *
111 * The driver reverts to PIO mode for individual requests that exceed
112 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
113 * 100% of all crazy scenarios here is not necessary.
114 *
115 * As it turns out though, we must allocate a full 4KB page for this,
116 * so the two PRD tables (ide0 & ide1) will each get half of that,
117 * allowing each to have about 256 entries (8 bytes each) from this.
118 */
119 #define PRD_BYTES 8
120 #define PRD_ENTRIES 256
121
122 /*
123 * Some more useful definitions
124 */
125 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
126 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
127 #define SECTOR_SIZE 512
128 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
129 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
130
131 /*
132 * Timeouts for various operations:
133 */
134 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
135 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
136 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
137 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
138 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
139 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
140
141 /*
142 * Op codes for special requests to be handled by ide_special_rq().
143 * Values should be in the range of 0x20 to 0x3f.
144 */
145 #define REQ_DRIVE_RESET 0x20
146
147 /*
148 * Check for an interrupt and acknowledge the interrupt status
149 */
150 struct hwif_s;
151 typedef int (ide_ack_intr_t)(struct hwif_s *);
152
153 /*
154 * hwif_chipset_t is used to keep track of the specific hardware
155 * chipset used by each IDE interface, if known.
156 */
157 enum { ide_unknown, ide_generic, ide_pci,
158 ide_cmd640, ide_dtc2278, ide_ali14xx,
159 ide_qd65xx, ide_umc8672, ide_ht6560b,
160 ide_rz1000, ide_trm290,
161 ide_cmd646, ide_cy82c693, ide_4drives,
162 ide_pmac, ide_acorn,
163 ide_au1xxx, ide_palm3710
164 };
165
166 typedef u8 hwif_chipset_t;
167
168 /*
169 * Structure to hold all information about the location of this port
170 */
171 typedef struct hw_regs_s {
172 union {
173 struct ide_io_ports io_ports;
174 unsigned long io_ports_array[IDE_NR_PORTS];
175 };
176
177 int irq; /* our irq number */
178 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
179 hwif_chipset_t chipset;
180 struct device *dev, *parent;
181 unsigned long config;
182 } hw_regs_t;
183
184 void ide_init_port_data(struct hwif_s *, unsigned int);
185 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
186
187 static inline void ide_std_init_ports(hw_regs_t *hw,
188 unsigned long io_addr,
189 unsigned long ctl_addr)
190 {
191 unsigned int i;
192
193 for (i = 0; i <= 7; i++)
194 hw->io_ports_array[i] = io_addr++;
195
196 hw->io_ports.ctl_addr = ctl_addr;
197 }
198
199 /* for IDE PCI controllers in legacy mode, temporary */
200 static inline int __ide_default_irq(unsigned long base)
201 {
202 switch (base) {
203 #ifdef CONFIG_IA64
204 case 0x1f0: return isa_irq_to_vector(14);
205 case 0x170: return isa_irq_to_vector(15);
206 #else
207 case 0x1f0: return 14;
208 case 0x170: return 15;
209 #endif
210 }
211 return 0;
212 }
213
214 #if defined(CONFIG_ARM) || defined(CONFIG_FRV) || defined(CONFIG_M68K) || \
215 defined(CONFIG_MIPS) || defined(CONFIG_MN10300) || defined(CONFIG_PARISC) \
216 || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || defined(CONFIG_SPARC64)
217 #include <asm/ide.h>
218 #else
219 #include <asm-generic/ide_iops.h>
220 #endif
221
222 #ifndef MAX_HWIFS
223 #if defined(CONFIG_BLACKFIN) || defined(CONFIG_H8300) || defined(CONFIG_XTENSA)
224 # define MAX_HWIFS 1
225 #else
226 # define MAX_HWIFS 10
227 #endif
228 #endif
229
230 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
231 #undef MAX_HWIFS
232 #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
233 #endif
234
235 /* Currently only m68k, apus and m8xx need it */
236 #ifndef IDE_ARCH_ACK_INTR
237 # define ide_ack_intr(hwif) (1)
238 #endif
239
240 /* Currently only Atari needs it */
241 #ifndef IDE_ARCH_LOCK
242 # define ide_release_lock() do {} while (0)
243 # define ide_get_lock(hdlr, data) do {} while (0)
244 #endif /* IDE_ARCH_LOCK */
245
246 /*
247 * Now for the data we need to maintain per-drive: ide_drive_t
248 */
249
250 #define ide_scsi 0x21
251 #define ide_disk 0x20
252 #define ide_optical 0x7
253 #define ide_cdrom 0x5
254 #define ide_tape 0x1
255 #define ide_floppy 0x0
256
257 /*
258 * Special Driver Flags
259 *
260 * set_geometry : respecify drive geometry
261 * recalibrate : seek to cyl 0
262 * set_multmode : set multmode count
263 * set_tune : tune interface for drive
264 * serviced : service command
265 * reserved : unused
266 */
267 typedef union {
268 unsigned all : 8;
269 struct {
270 unsigned set_geometry : 1;
271 unsigned recalibrate : 1;
272 unsigned set_multmode : 1;
273 unsigned set_tune : 1;
274 unsigned serviced : 1;
275 unsigned reserved : 3;
276 } b;
277 } special_t;
278
279 /*
280 * ATA-IDE Select Register, aka Device-Head
281 *
282 * head : always zeros here
283 * unit : drive select number: 0/1
284 * bit5 : always 1
285 * lba : using LBA instead of CHS
286 * bit7 : always 1
287 */
288 typedef union {
289 unsigned all : 8;
290 struct {
291 #if defined(__LITTLE_ENDIAN_BITFIELD)
292 unsigned head : 4;
293 unsigned unit : 1;
294 unsigned bit5 : 1;
295 unsigned lba : 1;
296 unsigned bit7 : 1;
297 #elif defined(__BIG_ENDIAN_BITFIELD)
298 unsigned bit7 : 1;
299 unsigned lba : 1;
300 unsigned bit5 : 1;
301 unsigned unit : 1;
302 unsigned head : 4;
303 #else
304 #error "Please fix <asm/byteorder.h>"
305 #endif
306 } b;
307 } select_t, ata_select_t;
308
309 /*
310 * Status returned from various ide_ functions
311 */
312 typedef enum {
313 ide_stopped, /* no drive operation was started */
314 ide_started, /* a drive operation was started, handler was set */
315 } ide_startstop_t;
316
317 struct ide_driver_s;
318 struct ide_settings_s;
319
320 #ifdef CONFIG_BLK_DEV_IDEACPI
321 struct ide_acpi_drive_link;
322 struct ide_acpi_hwif_link;
323 #endif
324
325 /* ATAPI device flags */
326 enum {
327 IDE_AFLAG_DRQ_INTERRUPT = (1 << 0),
328 IDE_AFLAG_MEDIA_CHANGED = (1 << 1),
329
330 /* ide-cd */
331 /* Drive cannot lock the door. */
332 IDE_AFLAG_NO_DOORLOCK = (1 << 2),
333 /* Drive cannot eject the disc. */
334 IDE_AFLAG_NO_EJECT = (1 << 3),
335 /* Drive is a pre ATAPI 1.2 drive. */
336 IDE_AFLAG_PRE_ATAPI12 = (1 << 4),
337 /* TOC addresses are in BCD. */
338 IDE_AFLAG_TOCADDR_AS_BCD = (1 << 5),
339 /* TOC track numbers are in BCD. */
340 IDE_AFLAG_TOCTRACKS_AS_BCD = (1 << 6),
341 /*
342 * Drive does not provide data in multiples of SECTOR_SIZE
343 * when more than one interrupt is needed.
344 */
345 IDE_AFLAG_LIMIT_NFRAMES = (1 << 7),
346 /* Seeking in progress. */
347 IDE_AFLAG_SEEKING = (1 << 8),
348 /* Saved TOC information is current. */
349 IDE_AFLAG_TOC_VALID = (1 << 9),
350 /* We think that the drive door is locked. */
351 IDE_AFLAG_DOOR_LOCKED = (1 << 10),
352 /* SET_CD_SPEED command is unsupported. */
353 IDE_AFLAG_NO_SPEED_SELECT = (1 << 11),
354 IDE_AFLAG_VERTOS_300_SSD = (1 << 12),
355 IDE_AFLAG_VERTOS_600_ESD = (1 << 13),
356 IDE_AFLAG_SANYO_3CD = (1 << 14),
357 IDE_AFLAG_FULL_CAPS_PAGE = (1 << 15),
358 IDE_AFLAG_PLAY_AUDIO_OK = (1 << 16),
359 IDE_AFLAG_LE_SPEED_FIELDS = (1 << 17),
360
361 /* ide-floppy */
362 /* Format in progress */
363 IDE_AFLAG_FORMAT_IN_PROGRESS = (1 << 18),
364 /* Avoid commands not supported in Clik drive */
365 IDE_AFLAG_CLIK_DRIVE = (1 << 19),
366 /* Requires BH algorithm for packets */
367 IDE_AFLAG_ZIP_DRIVE = (1 << 20),
368
369 /* ide-tape */
370 IDE_AFLAG_IGNORE_DSC = (1 << 21),
371 /* 0 When the tape position is unknown */
372 IDE_AFLAG_ADDRESS_VALID = (1 << 22),
373 /* Device already opened */
374 IDE_AFLAG_BUSY = (1 << 23),
375 /* Attempt to auto-detect the current user block size */
376 IDE_AFLAG_DETECT_BS = (1 << 24),
377 /* Currently on a filemark */
378 IDE_AFLAG_FILEMARK = (1 << 25),
379 /* 0 = no tape is loaded, so we don't rewind after ejecting */
380 IDE_AFLAG_MEDIUM_PRESENT = (1 << 26)
381 };
382
383 struct ide_drive_s {
384 char name[4]; /* drive name, such as "hda" */
385 char driver_req[10]; /* requests specific driver */
386
387 struct request_queue *queue; /* request queue */
388
389 struct request *rq; /* current request */
390 struct ide_drive_s *next; /* circular list of hwgroup drives */
391 void *driver_data; /* extra driver data */
392 struct hd_driveid *id; /* drive model identification info */
393 #ifdef CONFIG_IDE_PROC_FS
394 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
395 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
396 #endif
397 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
398
399 unsigned long sleep; /* sleep until this time */
400 unsigned long service_start; /* time we started last request */
401 unsigned long service_time; /* service time of last request */
402 unsigned long timeout; /* max time to wait for irq */
403
404 special_t special; /* special action flags */
405 select_t select; /* basic drive/head select reg value */
406
407 u8 keep_settings; /* restore settings after drive reset */
408 u8 using_dma; /* disk is using dma for read/write */
409 u8 retry_pio; /* retrying dma capable host in pio */
410 u8 state; /* retry state */
411 u8 waiting_for_dma; /* dma currently in progress */
412 u8 unmask; /* okay to unmask other irqs */
413 u8 noflush; /* don't attempt flushes */
414 u8 dsc_overlap; /* DSC overlap */
415 u8 nice1; /* give potential excess bandwidth */
416
417 unsigned present : 1; /* drive is physically present */
418 unsigned dead : 1; /* device ejected hint */
419 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
420 unsigned noprobe : 1; /* from: hdx=noprobe */
421 unsigned removable : 1; /* 1 if need to do check_media_change */
422 unsigned attach : 1; /* needed for removable devices */
423 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
424 unsigned no_unmask : 1; /* disallow setting unmask bit */
425 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
426 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
427 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
428 unsigned nodma : 1; /* disallow DMA */
429 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
430 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
431 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
432 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
433 unsigned post_reset : 1;
434 unsigned udma33_warned : 1;
435
436 u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
437 u8 quirk_list; /* considered quirky, set for a specific host */
438 u8 init_speed; /* transfer rate set at boot */
439 u8 current_speed; /* current transfer rate set */
440 u8 desired_speed; /* desired transfer rate set */
441 u8 dn; /* now wide spread use */
442 u8 wcache; /* status of write cache */
443 u8 acoustic; /* acoustic management */
444 u8 media; /* disk, cdrom, tape, floppy, ... */
445 u8 ready_stat; /* min status value for drive ready */
446 u8 mult_count; /* current multiple sector setting */
447 u8 mult_req; /* requested multiple sector setting */
448 u8 tune_req; /* requested drive tuning setting */
449 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
450 u8 bad_wstat; /* used for ignoring WRERR_STAT */
451 u8 nowerr; /* used for ignoring WRERR_STAT */
452 u8 sect0; /* offset of first sector for DM6:DDO */
453 u8 head; /* "real" number of heads */
454 u8 sect; /* "real" sectors per track */
455 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
456 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
457
458 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
459 unsigned int cyl; /* "real" number of cyls */
460 unsigned int drive_data; /* used by set_pio_mode/selectproc */
461 unsigned int failures; /* current failure count */
462 unsigned int max_failures; /* maximum allowed failure count */
463 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
464
465 u64 capacity64; /* total number of sectors */
466
467 int lun; /* logical unit */
468 int crc_count; /* crc counter to reduce drive speed */
469 #ifdef CONFIG_BLK_DEV_IDEACPI
470 struct ide_acpi_drive_link *acpidata;
471 #endif
472 struct list_head list;
473 struct device gendev;
474 struct completion gendev_rel_comp; /* to deal with device release() */
475
476 /* callback for packet commands */
477 void (*pc_callback)(struct ide_drive_s *);
478
479 unsigned long atapi_flags;
480 };
481
482 typedef struct ide_drive_s ide_drive_t;
483
484 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
485
486 #define IDE_CHIPSET_PCI_MASK \
487 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
488 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
489
490 struct ide_task_s;
491 struct ide_port_info;
492
493 struct ide_tp_ops {
494 void (*exec_command)(struct hwif_s *, u8);
495 u8 (*read_status)(struct hwif_s *);
496 u8 (*read_altstatus)(struct hwif_s *);
497 u8 (*read_sff_dma_status)(struct hwif_s *);
498
499 void (*set_irq)(struct hwif_s *, int);
500
501 void (*tf_load)(ide_drive_t *, struct ide_task_s *);
502 void (*tf_read)(ide_drive_t *, struct ide_task_s *);
503
504 void (*input_data)(ide_drive_t *, struct request *, void *,
505 unsigned int);
506 void (*output_data)(ide_drive_t *, struct request *, void *,
507 unsigned int);
508 };
509
510 extern const struct ide_tp_ops default_tp_ops;
511
512 struct ide_port_ops {
513 /* host specific initialization of a device */
514 void (*init_dev)(ide_drive_t *);
515 /* routine to program host for PIO mode */
516 void (*set_pio_mode)(ide_drive_t *, const u8);
517 /* routine to program host for DMA mode */
518 void (*set_dma_mode)(ide_drive_t *, const u8);
519 /* tweaks hardware to select drive */
520 void (*selectproc)(ide_drive_t *);
521 /* chipset polling based on hba specifics */
522 int (*reset_poll)(ide_drive_t *);
523 /* chipset specific changes to default for device-hba resets */
524 void (*pre_reset)(ide_drive_t *);
525 /* routine to reset controller after a disk reset */
526 void (*resetproc)(ide_drive_t *);
527 /* special host masking for drive selection */
528 void (*maskproc)(ide_drive_t *, int);
529 /* check host's drive quirk list */
530 void (*quirkproc)(ide_drive_t *);
531
532 u8 (*mdma_filter)(ide_drive_t *);
533 u8 (*udma_filter)(ide_drive_t *);
534
535 u8 (*cable_detect)(struct hwif_s *);
536 };
537
538 struct ide_dma_ops {
539 void (*dma_host_set)(struct ide_drive_s *, int);
540 int (*dma_setup)(struct ide_drive_s *);
541 void (*dma_exec_cmd)(struct ide_drive_s *, u8);
542 void (*dma_start)(struct ide_drive_s *);
543 int (*dma_end)(struct ide_drive_s *);
544 int (*dma_test_irq)(struct ide_drive_s *);
545 void (*dma_lost_irq)(struct ide_drive_s *);
546 void (*dma_timeout)(struct ide_drive_s *);
547 };
548
549 struct ide_host;
550
551 typedef struct hwif_s {
552 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
553 struct hwif_s *mate; /* other hwif from same PCI chip */
554 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
555 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
556
557 struct ide_host *host;
558
559 char name[6]; /* name of interface, eg. "ide0" */
560
561 struct ide_io_ports io_ports;
562
563 unsigned long sata_scr[SATA_NR_PORTS];
564
565 ide_drive_t drives[MAX_DRIVES]; /* drive info */
566
567 u8 major; /* our major number */
568 u8 index; /* 0 for ide0; 1 for ide1; ... */
569 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
570 u8 bus_state; /* power state of the IDE bus */
571
572 u32 host_flags;
573
574 u8 pio_mask;
575
576 u8 ultra_mask;
577 u8 mwdma_mask;
578 u8 swdma_mask;
579
580 u8 cbl; /* cable type */
581
582 hwif_chipset_t chipset; /* sub-module for tuning.. */
583
584 struct device *dev;
585
586 ide_ack_intr_t *ack_intr;
587
588 void (*rw_disk)(ide_drive_t *, struct request *);
589
590 const struct ide_tp_ops *tp_ops;
591 const struct ide_port_ops *port_ops;
592 const struct ide_dma_ops *dma_ops;
593
594 void (*ide_dma_clear_irq)(ide_drive_t *drive);
595
596 /* dma physical region descriptor table (cpu view) */
597 unsigned int *dmatable_cpu;
598 /* dma physical region descriptor table (dma view) */
599 dma_addr_t dmatable_dma;
600 /* Scatter-gather list used to build the above */
601 struct scatterlist *sg_table;
602 int sg_max_nents; /* Maximum number of entries in it */
603 int sg_nents; /* Current number of entries in it */
604 int sg_dma_direction; /* dma transfer direction */
605
606 /* data phase of the active command (currently only valid for PIO/DMA) */
607 int data_phase;
608
609 unsigned int nsect;
610 unsigned int nleft;
611 struct scatterlist *cursg;
612 unsigned int cursg_ofs;
613
614 int rqsize; /* max sectors per request */
615 int irq; /* our irq number */
616
617 unsigned long dma_base; /* base addr for dma ports */
618
619 unsigned long config_data; /* for use by chipset-specific code */
620 unsigned long select_data; /* for use by chipset-specific code */
621
622 unsigned long extra_base; /* extra addr for dma ports */
623 unsigned extra_ports; /* number of extra dma ports */
624
625 unsigned present : 1; /* this interface exists */
626 unsigned serialized : 1; /* serialized all channel operation */
627 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
628 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
629
630 struct device gendev;
631 struct device *portdev;
632
633 struct completion gendev_rel_comp; /* To deal with device release() */
634
635 void *hwif_data; /* extra hwif data */
636
637 unsigned dma;
638
639 #ifdef CONFIG_BLK_DEV_IDEACPI
640 struct ide_acpi_hwif_link *acpidata;
641 #endif
642 } ____cacheline_internodealigned_in_smp ide_hwif_t;
643
644 struct ide_host {
645 ide_hwif_t *ports[MAX_HWIFS];
646 unsigned int n_ports;
647 struct device *dev[2];
648 unsigned long host_flags;
649 void *host_priv;
650 };
651
652 /*
653 * internal ide interrupt handler type
654 */
655 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
656 typedef int (ide_expiry_t)(ide_drive_t *);
657
658 /* used by ide-cd, ide-floppy, etc. */
659 typedef void (xfer_func_t)(ide_drive_t *, struct request *rq, void *, unsigned);
660
661 typedef struct hwgroup_s {
662 /* irq handler, if active */
663 ide_startstop_t (*handler)(ide_drive_t *);
664
665 /* BOOL: protects all fields below */
666 volatile int busy;
667 /* BOOL: wake us up on timer expiry */
668 unsigned int sleeping : 1;
669 /* BOOL: polling active & poll_timeout field valid */
670 unsigned int polling : 1;
671
672 /* current drive */
673 ide_drive_t *drive;
674 /* ptr to current hwif in linked-list */
675 ide_hwif_t *hwif;
676
677 /* current request */
678 struct request *rq;
679
680 /* failsafe timer */
681 struct timer_list timer;
682 /* timeout value during long polls */
683 unsigned long poll_timeout;
684 /* queried upon timeouts */
685 int (*expiry)(ide_drive_t *);
686
687 int req_gen;
688 int req_gen_timer;
689 } ide_hwgroup_t;
690
691 typedef struct ide_driver_s ide_driver_t;
692
693 extern struct mutex ide_setting_mtx;
694
695 int set_io_32bit(ide_drive_t *, int);
696 int set_pio_mode(ide_drive_t *, int);
697 int set_using_dma(ide_drive_t *, int);
698
699 /* ATAPI packet command flags */
700 enum {
701 /* set when an error is considered normal - no retry (ide-tape) */
702 PC_FLAG_ABORT = (1 << 0),
703 PC_FLAG_SUPPRESS_ERROR = (1 << 1),
704 PC_FLAG_WAIT_FOR_DSC = (1 << 2),
705 PC_FLAG_DMA_OK = (1 << 3),
706 PC_FLAG_DMA_IN_PROGRESS = (1 << 4),
707 PC_FLAG_DMA_ERROR = (1 << 5),
708 PC_FLAG_WRITING = (1 << 6),
709 /* command timed out */
710 PC_FLAG_TIMEDOUT = (1 << 7),
711 };
712
713 struct ide_atapi_pc {
714 /* actual packet bytes */
715 u8 c[12];
716 /* incremented on each retry */
717 int retries;
718 int error;
719
720 /* bytes to transfer */
721 int req_xfer;
722 /* bytes actually transferred */
723 int xferred;
724
725 /* data buffer */
726 u8 *buf;
727 /* current buffer position */
728 u8 *cur_pos;
729 int buf_size;
730 /* missing/available data on the current buffer */
731 int b_count;
732
733 /* the corresponding request */
734 struct request *rq;
735
736 unsigned long flags;
737
738 /*
739 * those are more or less driver-specific and some of them are subject
740 * to change/removal later.
741 */
742 u8 pc_buf[256];
743
744 /* idetape only */
745 struct idetape_bh *bh;
746 char *b_data;
747
748 /* idescsi only for now */
749 struct scatterlist *sg;
750 unsigned int sg_cnt;
751
752 struct scsi_cmnd *scsi_cmd;
753 void (*done) (struct scsi_cmnd *);
754
755 unsigned long timeout;
756 };
757
758 #ifdef CONFIG_IDE_PROC_FS
759 /*
760 * configurable drive settings
761 */
762
763 #define TYPE_INT 0
764 #define TYPE_BYTE 1
765 #define TYPE_SHORT 2
766
767 #define SETTING_READ (1 << 0)
768 #define SETTING_WRITE (1 << 1)
769 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
770
771 typedef int (ide_procset_t)(ide_drive_t *, int);
772 typedef struct ide_settings_s {
773 char *name;
774 int rw;
775 int data_type;
776 int min;
777 int max;
778 int mul_factor;
779 int div_factor;
780 void *data;
781 ide_procset_t *set;
782 int auto_remove;
783 struct ide_settings_s *next;
784 } ide_settings_t;
785
786 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
787
788 /*
789 * /proc/ide interface
790 */
791 typedef struct {
792 const char *name;
793 mode_t mode;
794 read_proc_t *read_proc;
795 write_proc_t *write_proc;
796 } ide_proc_entry_t;
797
798 void proc_ide_create(void);
799 void proc_ide_destroy(void);
800 void ide_proc_register_port(ide_hwif_t *);
801 void ide_proc_port_register_devices(ide_hwif_t *);
802 void ide_proc_unregister_device(ide_drive_t *);
803 void ide_proc_unregister_port(ide_hwif_t *);
804 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
805 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
806
807 void ide_add_generic_settings(ide_drive_t *);
808
809 read_proc_t proc_ide_read_capacity;
810 read_proc_t proc_ide_read_geometry;
811
812 /*
813 * Standard exit stuff:
814 */
815 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
816 { \
817 len -= off; \
818 if (len < count) { \
819 *eof = 1; \
820 if (len <= 0) \
821 return 0; \
822 } else \
823 len = count; \
824 *start = page + off; \
825 return len; \
826 }
827 #else
828 static inline void proc_ide_create(void) { ; }
829 static inline void proc_ide_destroy(void) { ; }
830 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
831 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
832 static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
833 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
834 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
835 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
836 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
837 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
838 #endif
839
840 /*
841 * Power Management step value (rq->pm->pm_step).
842 *
843 * The step value starts at 0 (ide_pm_state_start_suspend) for a
844 * suspend operation or 1000 (ide_pm_state_start_resume) for a
845 * resume operation.
846 *
847 * For each step, the core calls the subdriver start_power_step() first.
848 * This can return:
849 * - ide_stopped : In this case, the core calls us back again unless
850 * step have been set to ide_power_state_completed.
851 * - ide_started : In this case, the channel is left busy until an
852 * async event (interrupt) occurs.
853 * Typically, start_power_step() will issue a taskfile request with
854 * do_rw_taskfile().
855 *
856 * Upon reception of the interrupt, the core will call complete_power_step()
857 * with the error code if any. This routine should update the step value
858 * and return. It should not start a new request. The core will call
859 * start_power_step for the new step value, unless step have been set to
860 * ide_power_state_completed.
861 *
862 * Subdrivers are expected to define their own additional power
863 * steps from 1..999 for suspend and from 1001..1999 for resume,
864 * other values are reserved for future use.
865 */
866
867 enum {
868 ide_pm_state_completed = -1,
869 ide_pm_state_start_suspend = 0,
870 ide_pm_state_start_resume = 1000,
871 };
872
873 /*
874 * Subdrivers support.
875 *
876 * The gendriver.owner field should be set to the module owner of this driver.
877 * The gendriver.name field should be set to the name of this driver
878 */
879 struct ide_driver_s {
880 const char *version;
881 u8 media;
882 unsigned supports_dsc_overlap : 1;
883 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
884 int (*end_request)(ide_drive_t *, int, int);
885 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
886 struct device_driver gen_driver;
887 int (*probe)(ide_drive_t *);
888 void (*remove)(ide_drive_t *);
889 void (*resume)(ide_drive_t *);
890 void (*shutdown)(ide_drive_t *);
891 #ifdef CONFIG_IDE_PROC_FS
892 ide_proc_entry_t *proc;
893 #endif
894 };
895
896 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
897
898 int ide_device_get(ide_drive_t *);
899 void ide_device_put(ide_drive_t *);
900
901 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
902
903 extern int ide_vlb_clk;
904 extern int ide_pci_clk;
905
906 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
907 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
908 int uptodate, int nr_sectors);
909
910 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
911
912 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
913 ide_expiry_t *);
914
915 void ide_execute_pkt_cmd(ide_drive_t *);
916
917 void ide_pad_transfer(ide_drive_t *, int, int);
918
919 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
920
921 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
922
923 extern void ide_fix_driveid(struct hd_driveid *);
924
925 extern void ide_fixstring(u8 *, const int, const int);
926
927 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
928
929 extern ide_startstop_t ide_do_reset (ide_drive_t *);
930
931 extern void ide_do_drive_cmd(ide_drive_t *, struct request *);
932
933 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
934
935 enum {
936 IDE_TFLAG_LBA48 = (1 << 0),
937 IDE_TFLAG_FLAGGED = (1 << 2),
938 IDE_TFLAG_OUT_DATA = (1 << 3),
939 IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
940 IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
941 IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
942 IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
943 IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
944 IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
945 IDE_TFLAG_OUT_HOB_NSECT |
946 IDE_TFLAG_OUT_HOB_LBAL |
947 IDE_TFLAG_OUT_HOB_LBAM |
948 IDE_TFLAG_OUT_HOB_LBAH,
949 IDE_TFLAG_OUT_FEATURE = (1 << 9),
950 IDE_TFLAG_OUT_NSECT = (1 << 10),
951 IDE_TFLAG_OUT_LBAL = (1 << 11),
952 IDE_TFLAG_OUT_LBAM = (1 << 12),
953 IDE_TFLAG_OUT_LBAH = (1 << 13),
954 IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
955 IDE_TFLAG_OUT_NSECT |
956 IDE_TFLAG_OUT_LBAL |
957 IDE_TFLAG_OUT_LBAM |
958 IDE_TFLAG_OUT_LBAH,
959 IDE_TFLAG_OUT_DEVICE = (1 << 14),
960 IDE_TFLAG_WRITE = (1 << 15),
961 IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16),
962 IDE_TFLAG_IN_DATA = (1 << 17),
963 IDE_TFLAG_CUSTOM_HANDLER = (1 << 18),
964 IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19),
965 IDE_TFLAG_IN_HOB_FEATURE = (1 << 20),
966 IDE_TFLAG_IN_HOB_NSECT = (1 << 21),
967 IDE_TFLAG_IN_HOB_LBAL = (1 << 22),
968 IDE_TFLAG_IN_HOB_LBAM = (1 << 23),
969 IDE_TFLAG_IN_HOB_LBAH = (1 << 24),
970 IDE_TFLAG_IN_HOB_LBA = IDE_TFLAG_IN_HOB_LBAL |
971 IDE_TFLAG_IN_HOB_LBAM |
972 IDE_TFLAG_IN_HOB_LBAH,
973 IDE_TFLAG_IN_HOB = IDE_TFLAG_IN_HOB_FEATURE |
974 IDE_TFLAG_IN_HOB_NSECT |
975 IDE_TFLAG_IN_HOB_LBA,
976 IDE_TFLAG_IN_FEATURE = (1 << 1),
977 IDE_TFLAG_IN_NSECT = (1 << 25),
978 IDE_TFLAG_IN_LBAL = (1 << 26),
979 IDE_TFLAG_IN_LBAM = (1 << 27),
980 IDE_TFLAG_IN_LBAH = (1 << 28),
981 IDE_TFLAG_IN_LBA = IDE_TFLAG_IN_LBAL |
982 IDE_TFLAG_IN_LBAM |
983 IDE_TFLAG_IN_LBAH,
984 IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT |
985 IDE_TFLAG_IN_LBA,
986 IDE_TFLAG_IN_DEVICE = (1 << 29),
987 IDE_TFLAG_HOB = IDE_TFLAG_OUT_HOB |
988 IDE_TFLAG_IN_HOB,
989 IDE_TFLAG_TF = IDE_TFLAG_OUT_TF |
990 IDE_TFLAG_IN_TF,
991 IDE_TFLAG_DEVICE = IDE_TFLAG_OUT_DEVICE |
992 IDE_TFLAG_IN_DEVICE,
993 /* force 16-bit I/O operations */
994 IDE_TFLAG_IO_16BIT = (1 << 30),
995 /* ide_task_t was allocated using kmalloc() */
996 IDE_TFLAG_DYN = (1 << 31),
997 };
998
999 struct ide_taskfile {
1000 u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
1001
1002 u8 hob_feature; /* 1-5: additional data to support LBA48 */
1003 u8 hob_nsect;
1004 u8 hob_lbal;
1005 u8 hob_lbam;
1006 u8 hob_lbah;
1007
1008 u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
1009
1010 union { /*  7: */
1011 u8 error; /* read: error */
1012 u8 feature; /* write: feature */
1013 };
1014
1015 u8 nsect; /* 8: number of sectors */
1016 u8 lbal; /* 9: LBA low */
1017 u8 lbam; /* 10: LBA mid */
1018 u8 lbah; /* 11: LBA high */
1019
1020 u8 device; /* 12: device select */
1021
1022 union { /* 13: */
1023 u8 status; /*  read: status  */
1024 u8 command; /* write: command */
1025 };
1026 };
1027
1028 typedef struct ide_task_s {
1029 union {
1030 struct ide_taskfile tf;
1031 u8 tf_array[14];
1032 };
1033 u32 tf_flags;
1034 int data_phase;
1035 struct request *rq; /* copy of request */
1036 void *special; /* valid_t generally */
1037 } ide_task_t;
1038
1039 void ide_tf_dump(const char *, struct ide_taskfile *);
1040
1041 void ide_exec_command(ide_hwif_t *, u8);
1042 u8 ide_read_status(ide_hwif_t *);
1043 u8 ide_read_altstatus(ide_hwif_t *);
1044 u8 ide_read_sff_dma_status(ide_hwif_t *);
1045
1046 void ide_set_irq(ide_hwif_t *, int);
1047
1048 void ide_tf_load(ide_drive_t *, ide_task_t *);
1049 void ide_tf_read(ide_drive_t *, ide_task_t *);
1050
1051 void ide_input_data(ide_drive_t *, struct request *, void *, unsigned int);
1052 void ide_output_data(ide_drive_t *, struct request *, void *, unsigned int);
1053
1054 extern void SELECT_DRIVE(ide_drive_t *);
1055 void SELECT_MASK(ide_drive_t *, int);
1056
1057 u8 ide_read_error(ide_drive_t *);
1058 void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
1059
1060 extern int drive_is_ready(ide_drive_t *);
1061
1062 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
1063
1064 ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
1065 ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
1066 void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
1067 void (*retry_pc)(ide_drive_t *), void (*dsc_handle)(ide_drive_t *),
1068 void (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned int,
1069 int));
1070 ide_startstop_t ide_transfer_pc(ide_drive_t *, struct ide_atapi_pc *,
1071 ide_handler_t *, unsigned int, ide_expiry_t *);
1072 ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_atapi_pc *,
1073 ide_handler_t *, unsigned int, ide_expiry_t *);
1074
1075 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1076
1077 void task_end_request(ide_drive_t *, struct request *, u8);
1078
1079 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
1080 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
1081
1082 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1083 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1084 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1085
1086 extern int ide_driveid_update(ide_drive_t *);
1087 extern int ide_config_drive_speed(ide_drive_t *, u8);
1088 extern u8 eighty_ninty_three (ide_drive_t *);
1089 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1090
1091 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1092
1093 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1094
1095 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1096 extern void ide_timer_expiry(unsigned long);
1097 extern irqreturn_t ide_intr(int irq, void *dev_id);
1098 extern void do_ide_request(struct request_queue *);
1099
1100 void ide_init_disk(struct gendisk *, ide_drive_t *);
1101
1102 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1103 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1104 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1105 #else
1106 #define ide_pci_register_driver(d) pci_register_driver(d)
1107 #endif
1108
1109 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int,
1110 hw_regs_t *, hw_regs_t **);
1111 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1112
1113 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1114 int ide_pci_set_master(struct pci_dev *, const char *);
1115 unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
1116 extern const struct ide_dma_ops sff_dma_ops;
1117 int ide_pci_check_simplex(ide_hwif_t *, const struct ide_port_info *);
1118 int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
1119 #else
1120 static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
1121 const struct ide_port_info *d)
1122 {
1123 return -EINVAL;
1124 }
1125 #endif
1126
1127 typedef struct ide_pci_enablebit_s {
1128 u8 reg; /* byte pci reg holding the enable-bit */
1129 u8 mask; /* mask to isolate the enable-bit */
1130 u8 val; /* value of masked reg when "enabled" */
1131 } ide_pci_enablebit_t;
1132
1133 enum {
1134 /* Uses ISA control ports not PCI ones. */
1135 IDE_HFLAG_ISA_PORTS = (1 << 0),
1136 /* single port device */
1137 IDE_HFLAG_SINGLE = (1 << 1),
1138 /* don't use legacy PIO blacklist */
1139 IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
1140 /* set for the second port of QD65xx */
1141 IDE_HFLAG_QD_2ND_PORT = (1 << 3),
1142 /* use PIO8/9 for prefetch off/on */
1143 IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
1144 /* use PIO6/7 for fast-devsel off/on */
1145 IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
1146 /* use 100-102 and 200-202 PIO values to set DMA modes */
1147 IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
1148 /*
1149 * keep DMA setting when programming PIO mode, may be used only
1150 * for hosts which have separate PIO and DMA timings (ie. PMAC)
1151 */
1152 IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1153 /* program host for the transfer mode after programming device */
1154 IDE_HFLAG_POST_SET_MODE = (1 << 8),
1155 /* don't program host/device for the transfer mode ("smart" hosts) */
1156 IDE_HFLAG_NO_SET_MODE = (1 << 9),
1157 /* trust BIOS for programming chipset/device for DMA */
1158 IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
1159 /* host is CS5510/CS5520 */
1160 IDE_HFLAG_CS5520 = (1 << 11),
1161 /* ATAPI DMA is unsupported */
1162 IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
1163 /* set if host is a "non-bootable" controller */
1164 IDE_HFLAG_NON_BOOTABLE = (1 << 13),
1165 /* host doesn't support DMA */
1166 IDE_HFLAG_NO_DMA = (1 << 14),
1167 /* check if host is PCI IDE device before allowing DMA */
1168 IDE_HFLAG_NO_AUTODMA = (1 << 15),
1169 /* host uses MMIO */
1170 IDE_HFLAG_MMIO = (1 << 16),
1171 /* no LBA48 */
1172 IDE_HFLAG_NO_LBA48 = (1 << 17),
1173 /* no LBA48 DMA */
1174 IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
1175 /* data FIFO is cleared by an error */
1176 IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
1177 /* serialize ports */
1178 IDE_HFLAG_SERIALIZE = (1 << 20),
1179 /* use legacy IRQs */
1180 IDE_HFLAG_LEGACY_IRQS = (1 << 21),
1181 /* force use of legacy IRQs */
1182 IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
1183 /* limit LBA48 requests to 256 sectors */
1184 IDE_HFLAG_RQSIZE_256 = (1 << 23),
1185 /* use 32-bit I/O ops */
1186 IDE_HFLAG_IO_32BIT = (1 << 24),
1187 /* unmask IRQs */
1188 IDE_HFLAG_UNMASK_IRQS = (1 << 25),
1189 /* serialize ports if DMA is possible (for sl82c105) */
1190 IDE_HFLAG_SERIALIZE_DMA = (1 << 27),
1191 /* force host out of "simplex" mode */
1192 IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
1193 /* DSC overlap is unsupported */
1194 IDE_HFLAG_NO_DSC = (1 << 29),
1195 /* never use 32-bit I/O ops */
1196 IDE_HFLAG_NO_IO_32BIT = (1 << 30),
1197 /* never unmask IRQs */
1198 IDE_HFLAG_NO_UNMASK_IRQS = (1 << 31),
1199 };
1200
1201 #ifdef CONFIG_BLK_DEV_OFFBOARD
1202 # define IDE_HFLAG_OFF_BOARD 0
1203 #else
1204 # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_NON_BOOTABLE
1205 #endif
1206
1207 struct ide_port_info {
1208 char *name;
1209 unsigned int (*init_chipset)(struct pci_dev *);
1210 void (*init_iops)(ide_hwif_t *);
1211 void (*init_hwif)(ide_hwif_t *);
1212 int (*init_dma)(ide_hwif_t *,
1213 const struct ide_port_info *);
1214
1215 const struct ide_tp_ops *tp_ops;
1216 const struct ide_port_ops *port_ops;
1217 const struct ide_dma_ops *dma_ops;
1218
1219 ide_pci_enablebit_t enablebits[2];
1220 hwif_chipset_t chipset;
1221 u32 host_flags;
1222 u8 pio_mask;
1223 u8 swdma_mask;
1224 u8 mwdma_mask;
1225 u8 udma_mask;
1226 };
1227
1228 int ide_pci_init_one(struct pci_dev *, const struct ide_port_info *, void *);
1229 int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
1230 const struct ide_port_info *, void *);
1231 void ide_pci_remove(struct pci_dev *);
1232
1233 void ide_map_sg(ide_drive_t *, struct request *);
1234 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1235
1236 #define BAD_DMA_DRIVE 0
1237 #define GOOD_DMA_DRIVE 1
1238
1239 struct drive_list_entry {
1240 const char *id_model;
1241 const char *id_firmware;
1242 };
1243
1244 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1245
1246 #ifdef CONFIG_BLK_DEV_IDEDMA
1247 int __ide_dma_bad_drive(ide_drive_t *);
1248 int ide_id_dma_bug(ide_drive_t *);
1249
1250 u8 ide_find_dma_mode(ide_drive_t *, u8);
1251
1252 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1253 {
1254 return ide_find_dma_mode(drive, XFER_UDMA_6);
1255 }
1256
1257 void ide_dma_off_quietly(ide_drive_t *);
1258 void ide_dma_off(ide_drive_t *);
1259 void ide_dma_on(ide_drive_t *);
1260 int ide_set_dma(ide_drive_t *);
1261 void ide_check_dma_crc(ide_drive_t *);
1262 ide_startstop_t ide_dma_intr(ide_drive_t *);
1263
1264 int ide_build_sglist(ide_drive_t *, struct request *);
1265 void ide_destroy_dmatable(ide_drive_t *);
1266
1267 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1268 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1269 int ide_allocate_dma_engine(ide_hwif_t *);
1270 void ide_release_dma_engine(ide_hwif_t *);
1271
1272 void ide_dma_host_set(ide_drive_t *, int);
1273 extern int ide_dma_setup(ide_drive_t *);
1274 void ide_dma_exec_cmd(ide_drive_t *, u8);
1275 extern void ide_dma_start(ide_drive_t *);
1276 extern int __ide_dma_end(ide_drive_t *);
1277 int ide_dma_test_irq(ide_drive_t *);
1278 extern void ide_dma_lost_irq(ide_drive_t *);
1279 extern void ide_dma_timeout(ide_drive_t *);
1280 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1281
1282 #else
1283 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1284 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1285 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1286 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1287 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1288 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1289 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1290 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1291 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1292 #endif /* CONFIG_BLK_DEV_IDEDMA */
1293
1294 #ifndef CONFIG_BLK_DEV_IDEDMA_SFF
1295 static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
1296 #endif
1297
1298 #ifdef CONFIG_BLK_DEV_IDEACPI
1299 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1300 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1301 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1302 extern void ide_acpi_init(ide_hwif_t *hwif);
1303 void ide_acpi_port_init_devices(ide_hwif_t *);
1304 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1305 #else
1306 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1307 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1308 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1309 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1310 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1311 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1312 #endif
1313
1314 void ide_remove_port_from_hwgroup(ide_hwif_t *);
1315 void ide_unregister(ide_hwif_t *);
1316
1317 void ide_register_region(struct gendisk *);
1318 void ide_unregister_region(struct gendisk *);
1319
1320 void ide_undecoded_slave(ide_drive_t *);
1321
1322 void ide_port_apply_params(ide_hwif_t *);
1323
1324 struct ide_host *ide_host_alloc_all(const struct ide_port_info *, hw_regs_t **);
1325 struct ide_host *ide_host_alloc(const struct ide_port_info *, hw_regs_t **);
1326 void ide_host_free(struct ide_host *);
1327 int ide_host_register(struct ide_host *, const struct ide_port_info *,
1328 hw_regs_t **);
1329 int ide_host_add(const struct ide_port_info *, hw_regs_t **,
1330 struct ide_host **);
1331 void ide_host_remove(struct ide_host *);
1332 int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
1333 void ide_port_unregister_devices(ide_hwif_t *);
1334 void ide_port_scan(ide_hwif_t *);
1335
1336 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1337 {
1338 return hwif->hwif_data;
1339 }
1340
1341 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1342 {
1343 hwif->hwif_data = data;
1344 }
1345
1346 const char *ide_xfer_verbose(u8 mode);
1347 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1348 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1349
1350 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1351 {
1352 return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1353 }
1354
1355 static inline int ide_dev_is_sata(struct hd_driveid *id)
1356 {
1357 /*
1358 * See if word 93 is 0 AND drive is at least ATA-5 compatible
1359 * verifying that word 80 by casting it to a signed type --
1360 * this trick allows us to filter out the reserved values of
1361 * 0x0000 and 0xffff along with the earlier ATA revisions...
1362 */
1363 if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1364 return 1;
1365 return 0;
1366 }
1367
1368 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1369 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1370
1371 struct ide_timing {
1372 u8 mode;
1373 u8 setup; /* t1 */
1374 u16 act8b; /* t2 for 8-bit io */
1375 u16 rec8b; /* t2i for 8-bit io */
1376 u16 cyc8b; /* t0 for 8-bit io */
1377 u16 active; /* t2 or tD */
1378 u16 recover; /* t2i or tK */
1379 u16 cycle; /* t0 */
1380 u16 udma; /* t2CYCTYP/2 */
1381 };
1382
1383 enum {
1384 IDE_TIMING_SETUP = (1 << 0),
1385 IDE_TIMING_ACT8B = (1 << 1),
1386 IDE_TIMING_REC8B = (1 << 2),
1387 IDE_TIMING_CYC8B = (1 << 3),
1388 IDE_TIMING_8BIT = IDE_TIMING_ACT8B | IDE_TIMING_REC8B |
1389 IDE_TIMING_CYC8B,
1390 IDE_TIMING_ACTIVE = (1 << 4),
1391 IDE_TIMING_RECOVER = (1 << 5),
1392 IDE_TIMING_CYCLE = (1 << 6),
1393 IDE_TIMING_UDMA = (1 << 7),
1394 IDE_TIMING_ALL = IDE_TIMING_SETUP | IDE_TIMING_8BIT |
1395 IDE_TIMING_ACTIVE | IDE_TIMING_RECOVER |
1396 IDE_TIMING_CYCLE | IDE_TIMING_UDMA,
1397 };
1398
1399 struct ide_timing *ide_timing_find_mode(u8);
1400 u16 ide_pio_cycle_time(ide_drive_t *, u8);
1401 void ide_timing_merge(struct ide_timing *, struct ide_timing *,
1402 struct ide_timing *, unsigned int);
1403 int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
1404
1405 int ide_scan_pio_blacklist(char *);
1406
1407 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1408
1409 int ide_set_pio_mode(ide_drive_t *, u8);
1410 int ide_set_dma_mode(ide_drive_t *, u8);
1411
1412 void ide_set_pio(ide_drive_t *, u8);
1413
1414 static inline void ide_set_max_pio(ide_drive_t *drive)
1415 {
1416 ide_set_pio(drive, 255);
1417 }
1418
1419 extern spinlock_t ide_lock;
1420 extern struct mutex ide_cfg_mtx;
1421 /*
1422 * Structure locking:
1423 *
1424 * ide_cfg_mtx and ide_lock together protect changes to
1425 * ide_hwif_t->{next,hwgroup}
1426 * ide_drive_t->next
1427 *
1428 * ide_hwgroup_t->busy: ide_lock
1429 * ide_hwgroup_t->hwif: ide_lock
1430 * ide_hwif_t->mate: constant, no locking
1431 * ide_drive_t->hwif: constant, no locking
1432 */
1433
1434 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1435
1436 extern struct bus_type ide_bus_type;
1437 extern struct class *ide_port_class;
1438
1439 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1440 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1441
1442 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1443 #define ide_id_has_flush_cache_ext(id) \
1444 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1445
1446 static inline void ide_dump_identify(u8 *id)
1447 {
1448 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1449 }
1450
1451 static inline int hwif_to_node(ide_hwif_t *hwif)
1452 {
1453 struct pci_dev *dev = to_pci_dev(hwif->dev);
1454 return hwif->dev ? pcibus_to_node(dev->bus) : -1;
1455 }
1456
1457 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1458 {
1459 ide_hwif_t *hwif = HWIF(drive);
1460
1461 return &hwif->drives[(drive->dn ^ 1) & 1];
1462 }
1463 #endif /* _IDE_H */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree