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ide: include <linux/hdreg.h> only when needed
[deliverable/linux.git] / include / linux / ide.h
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/ata.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
91 #define BAD_R_STAT (ATA_BUSY | ATA_ERR)
92 #define BAD_W_STAT (BAD_R_STAT | ATA_DF)
93 #define BAD_STAT (BAD_R_STAT | ATA_DRQ)
94 #define DRIVE_READY (ATA_DRDY | ATA_DSC)
95
96 #define BAD_CRC (ATA_ABORTED | ATA_ICRC)
97
98 #define SATA_NR_PORTS (3) /* 16 possible ?? */
99
100 #define SATA_STATUS_OFFSET (0)
101 #define SATA_ERROR_OFFSET (1)
102 #define SATA_CONTROL_OFFSET (2)
103
104 /*
105 * Our Physical Region Descriptor (PRD) table should be large enough
106 * to handle the biggest I/O request we are likely to see. Since requests
107 * can have no more than 256 sectors, and since the typical blocksize is
108 * two or more sectors, we could get by with a limit of 128 entries here for
109 * the usual worst case. Most requests seem to include some contiguous blocks,
110 * further reducing the number of table entries required.
111 *
112 * The driver reverts to PIO mode for individual requests that exceed
113 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
114 * 100% of all crazy scenarios here is not necessary.
115 *
116 * As it turns out though, we must allocate a full 4KB page for this,
117 * so the two PRD tables (ide0 & ide1) will each get half of that,
118 * allowing each to have about 256 entries (8 bytes each) from this.
119 */
120 #define PRD_BYTES 8
121 #define PRD_ENTRIES 256
122
123 /*
124 * Some more useful definitions
125 */
126 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
127 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
128 #define SECTOR_SIZE 512
129 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
130 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
131
132 /*
133 * Timeouts for various operations:
134 */
135 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
136 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
137 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
138 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
139 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
140 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
141
142 /*
143 * Op codes for special requests to be handled by ide_special_rq().
144 * Values should be in the range of 0x20 to 0x3f.
145 */
146 #define REQ_DRIVE_RESET 0x20
147
148 /*
149 * Check for an interrupt and acknowledge the interrupt status
150 */
151 struct hwif_s;
152 typedef int (ide_ack_intr_t)(struct hwif_s *);
153
154 /*
155 * hwif_chipset_t is used to keep track of the specific hardware
156 * chipset used by each IDE interface, if known.
157 */
158 enum { ide_unknown, ide_generic, ide_pci,
159 ide_cmd640, ide_dtc2278, ide_ali14xx,
160 ide_qd65xx, ide_umc8672, ide_ht6560b,
161 ide_rz1000, ide_trm290,
162 ide_cmd646, ide_cy82c693, ide_4drives,
163 ide_pmac, ide_acorn,
164 ide_au1xxx, ide_palm3710
165 };
166
167 typedef u8 hwif_chipset_t;
168
169 /*
170 * Structure to hold all information about the location of this port
171 */
172 typedef struct hw_regs_s {
173 union {
174 struct ide_io_ports io_ports;
175 unsigned long io_ports_array[IDE_NR_PORTS];
176 };
177
178 int irq; /* our irq number */
179 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
180 hwif_chipset_t chipset;
181 struct device *dev, *parent;
182 unsigned long config;
183 } hw_regs_t;
184
185 void ide_init_port_data(struct hwif_s *, unsigned int);
186 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
187
188 static inline void ide_std_init_ports(hw_regs_t *hw,
189 unsigned long io_addr,
190 unsigned long ctl_addr)
191 {
192 unsigned int i;
193
194 for (i = 0; i <= 7; i++)
195 hw->io_ports_array[i] = io_addr++;
196
197 hw->io_ports.ctl_addr = ctl_addr;
198 }
199
200 /* for IDE PCI controllers in legacy mode, temporary */
201 static inline int __ide_default_irq(unsigned long base)
202 {
203 switch (base) {
204 #ifdef CONFIG_IA64
205 case 0x1f0: return isa_irq_to_vector(14);
206 case 0x170: return isa_irq_to_vector(15);
207 #else
208 case 0x1f0: return 14;
209 case 0x170: return 15;
210 #endif
211 }
212 return 0;
213 }
214
215 #if defined(CONFIG_ARM) || defined(CONFIG_FRV) || defined(CONFIG_M68K) || \
216 defined(CONFIG_MIPS) || defined(CONFIG_MN10300) || defined(CONFIG_PARISC) \
217 || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || defined(CONFIG_SPARC64)
218 #include <asm/ide.h>
219 #else
220 #include <asm-generic/ide_iops.h>
221 #endif
222
223 #define MAX_HWIFS 10
224
225 /* Currently only m68k, apus and m8xx need it */
226 #ifndef IDE_ARCH_ACK_INTR
227 # define ide_ack_intr(hwif) (1)
228 #endif
229
230 /* Currently only Atari needs it */
231 #ifndef IDE_ARCH_LOCK
232 # define ide_release_lock() do {} while (0)
233 # define ide_get_lock(hdlr, data) do {} while (0)
234 #endif /* IDE_ARCH_LOCK */
235
236 /*
237 * Now for the data we need to maintain per-drive: ide_drive_t
238 */
239
240 #define ide_scsi 0x21
241 #define ide_disk 0x20
242 #define ide_optical 0x7
243 #define ide_cdrom 0x5
244 #define ide_tape 0x1
245 #define ide_floppy 0x0
246
247 /*
248 * Special Driver Flags
249 *
250 * set_geometry : respecify drive geometry
251 * recalibrate : seek to cyl 0
252 * set_multmode : set multmode count
253 * set_tune : tune interface for drive
254 * serviced : service command
255 * reserved : unused
256 */
257 typedef union {
258 unsigned all : 8;
259 struct {
260 unsigned set_geometry : 1;
261 unsigned recalibrate : 1;
262 unsigned set_multmode : 1;
263 unsigned set_tune : 1;
264 unsigned serviced : 1;
265 unsigned reserved : 3;
266 } b;
267 } special_t;
268
269 /*
270 * ATA-IDE Select Register, aka Device-Head
271 *
272 * head : always zeros here
273 * unit : drive select number: 0/1
274 * bit5 : always 1
275 * lba : using LBA instead of CHS
276 * bit7 : always 1
277 */
278 typedef union {
279 unsigned all : 8;
280 struct {
281 #if defined(__LITTLE_ENDIAN_BITFIELD)
282 unsigned head : 4;
283 unsigned unit : 1;
284 unsigned bit5 : 1;
285 unsigned lba : 1;
286 unsigned bit7 : 1;
287 #elif defined(__BIG_ENDIAN_BITFIELD)
288 unsigned bit7 : 1;
289 unsigned lba : 1;
290 unsigned bit5 : 1;
291 unsigned unit : 1;
292 unsigned head : 4;
293 #else
294 #error "Please fix <asm/byteorder.h>"
295 #endif
296 } b;
297 } select_t, ata_select_t;
298
299 /*
300 * Status returned from various ide_ functions
301 */
302 typedef enum {
303 ide_stopped, /* no drive operation was started */
304 ide_started, /* a drive operation was started, handler was set */
305 } ide_startstop_t;
306
307 struct ide_driver_s;
308 struct ide_settings_s;
309
310 #ifdef CONFIG_BLK_DEV_IDEACPI
311 struct ide_acpi_drive_link;
312 struct ide_acpi_hwif_link;
313 #endif
314
315 /* ATAPI device flags */
316 enum {
317 IDE_AFLAG_DRQ_INTERRUPT = (1 << 0),
318 IDE_AFLAG_MEDIA_CHANGED = (1 << 1),
319
320 /* ide-cd */
321 /* Drive cannot lock the door. */
322 IDE_AFLAG_NO_DOORLOCK = (1 << 2),
323 /* Drive cannot eject the disc. */
324 IDE_AFLAG_NO_EJECT = (1 << 3),
325 /* Drive is a pre ATAPI 1.2 drive. */
326 IDE_AFLAG_PRE_ATAPI12 = (1 << 4),
327 /* TOC addresses are in BCD. */
328 IDE_AFLAG_TOCADDR_AS_BCD = (1 << 5),
329 /* TOC track numbers are in BCD. */
330 IDE_AFLAG_TOCTRACKS_AS_BCD = (1 << 6),
331 /*
332 * Drive does not provide data in multiples of SECTOR_SIZE
333 * when more than one interrupt is needed.
334 */
335 IDE_AFLAG_LIMIT_NFRAMES = (1 << 7),
336 /* Seeking in progress. */
337 IDE_AFLAG_SEEKING = (1 << 8),
338 /* Saved TOC information is current. */
339 IDE_AFLAG_TOC_VALID = (1 << 9),
340 /* We think that the drive door is locked. */
341 IDE_AFLAG_DOOR_LOCKED = (1 << 10),
342 /* SET_CD_SPEED command is unsupported. */
343 IDE_AFLAG_NO_SPEED_SELECT = (1 << 11),
344 IDE_AFLAG_VERTOS_300_SSD = (1 << 12),
345 IDE_AFLAG_VERTOS_600_ESD = (1 << 13),
346 IDE_AFLAG_SANYO_3CD = (1 << 14),
347 IDE_AFLAG_FULL_CAPS_PAGE = (1 << 15),
348 IDE_AFLAG_PLAY_AUDIO_OK = (1 << 16),
349 IDE_AFLAG_LE_SPEED_FIELDS = (1 << 17),
350
351 /* ide-floppy */
352 /* Format in progress */
353 IDE_AFLAG_FORMAT_IN_PROGRESS = (1 << 18),
354 /* Avoid commands not supported in Clik drive */
355 IDE_AFLAG_CLIK_DRIVE = (1 << 19),
356 /* Requires BH algorithm for packets */
357 IDE_AFLAG_ZIP_DRIVE = (1 << 20),
358
359 /* ide-tape */
360 IDE_AFLAG_IGNORE_DSC = (1 << 21),
361 /* 0 When the tape position is unknown */
362 IDE_AFLAG_ADDRESS_VALID = (1 << 22),
363 /* Device already opened */
364 IDE_AFLAG_BUSY = (1 << 23),
365 /* Attempt to auto-detect the current user block size */
366 IDE_AFLAG_DETECT_BS = (1 << 24),
367 /* Currently on a filemark */
368 IDE_AFLAG_FILEMARK = (1 << 25),
369 /* 0 = no tape is loaded, so we don't rewind after ejecting */
370 IDE_AFLAG_MEDIUM_PRESENT = (1 << 26),
371
372 IDE_AFLAG_NO_AUTOCLOSE = (1 << 27),
373 };
374
375 struct ide_drive_s {
376 char name[4]; /* drive name, such as "hda" */
377 char driver_req[10]; /* requests specific driver */
378
379 struct request_queue *queue; /* request queue */
380
381 struct request *rq; /* current request */
382 struct ide_drive_s *next; /* circular list of hwgroup drives */
383 void *driver_data; /* extra driver data */
384 u16 *id; /* identification info */
385 #ifdef CONFIG_IDE_PROC_FS
386 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
387 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
388 #endif
389 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
390
391 unsigned long sleep; /* sleep until this time */
392 unsigned long service_start; /* time we started last request */
393 unsigned long service_time; /* service time of last request */
394 unsigned long timeout; /* max time to wait for irq */
395
396 special_t special; /* special action flags */
397 select_t select; /* basic drive/head select reg value */
398
399 u8 keep_settings; /* restore settings after drive reset */
400 u8 using_dma; /* disk is using dma for read/write */
401 u8 retry_pio; /* retrying dma capable host in pio */
402 u8 state; /* retry state */
403 u8 waiting_for_dma; /* dma currently in progress */
404 u8 unmask; /* okay to unmask other irqs */
405 u8 noflush; /* don't attempt flushes */
406 u8 dsc_overlap; /* DSC overlap */
407 u8 nice1; /* give potential excess bandwidth */
408
409 unsigned present : 1; /* drive is physically present */
410 unsigned dead : 1; /* device ejected hint */
411 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
412 unsigned noprobe : 1; /* from: hdx=noprobe */
413 unsigned removable : 1; /* 1 if need to do check_media_change */
414 unsigned attach : 1; /* needed for removable devices */
415 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
416 unsigned no_unmask : 1; /* disallow setting unmask bit */
417 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
418 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
419 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
420 unsigned nodma : 1; /* disallow DMA */
421 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
422 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
423 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
424 unsigned post_reset : 1;
425 unsigned udma33_warned : 1;
426
427 u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
428 u8 quirk_list; /* considered quirky, set for a specific host */
429 u8 init_speed; /* transfer rate set at boot */
430 u8 current_speed; /* current transfer rate set */
431 u8 desired_speed; /* desired transfer rate set */
432 u8 dn; /* now wide spread use */
433 u8 wcache; /* status of write cache */
434 u8 acoustic; /* acoustic management */
435 u8 media; /* disk, cdrom, tape, floppy, ... */
436 u8 ready_stat; /* min status value for drive ready */
437 u8 mult_count; /* current multiple sector setting */
438 u8 mult_req; /* requested multiple sector setting */
439 u8 tune_req; /* requested drive tuning setting */
440 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
441 u8 bad_wstat; /* used for ignoring ATA_DF */
442 u8 nowerr; /* used for ignoring ATA_DF */
443 u8 head; /* "real" number of heads */
444 u8 sect; /* "real" sectors per track */
445 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
446 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
447
448 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
449 unsigned int cyl; /* "real" number of cyls */
450 unsigned int drive_data; /* used by set_pio_mode/selectproc */
451 unsigned int failures; /* current failure count */
452 unsigned int max_failures; /* maximum allowed failure count */
453 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
454
455 u64 capacity64; /* total number of sectors */
456
457 int lun; /* logical unit */
458 int crc_count; /* crc counter to reduce drive speed */
459 #ifdef CONFIG_BLK_DEV_IDEACPI
460 struct ide_acpi_drive_link *acpidata;
461 #endif
462 struct list_head list;
463 struct device gendev;
464 struct completion gendev_rel_comp; /* to deal with device release() */
465
466 /* callback for packet commands */
467 void (*pc_callback)(struct ide_drive_s *);
468
469 unsigned long atapi_flags;
470 };
471
472 typedef struct ide_drive_s ide_drive_t;
473
474 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
475
476 struct ide_task_s;
477 struct ide_port_info;
478
479 struct ide_tp_ops {
480 void (*exec_command)(struct hwif_s *, u8);
481 u8 (*read_status)(struct hwif_s *);
482 u8 (*read_altstatus)(struct hwif_s *);
483 u8 (*read_sff_dma_status)(struct hwif_s *);
484
485 void (*set_irq)(struct hwif_s *, int);
486
487 void (*tf_load)(ide_drive_t *, struct ide_task_s *);
488 void (*tf_read)(ide_drive_t *, struct ide_task_s *);
489
490 void (*input_data)(ide_drive_t *, struct request *, void *,
491 unsigned int);
492 void (*output_data)(ide_drive_t *, struct request *, void *,
493 unsigned int);
494 };
495
496 extern const struct ide_tp_ops default_tp_ops;
497
498 /**
499 * struct ide_port_ops - IDE port operations
500 *
501 * @init_dev: host specific initialization of a device
502 * @set_pio_mode: routine to program host for PIO mode
503 * @set_dma_mode: routine to program host for DMA mode
504 * @selectproc: tweaks hardware to select drive
505 * @reset_poll: chipset polling based on hba specifics
506 * @pre_reset: chipset specific changes to default for device-hba resets
507 * @resetproc: routine to reset controller after a disk reset
508 * @maskproc: special host masking for drive selection
509 * @quirkproc: check host's drive quirk list
510 *
511 * @mdma_filter: filter MDMA modes
512 * @udma_filter: filter UDMA modes
513 *
514 * @cable_detect: detect cable type
515 */
516 struct ide_port_ops {
517 void (*init_dev)(ide_drive_t *);
518 void (*set_pio_mode)(ide_drive_t *, const u8);
519 void (*set_dma_mode)(ide_drive_t *, const u8);
520 void (*selectproc)(ide_drive_t *);
521 int (*reset_poll)(ide_drive_t *);
522 void (*pre_reset)(ide_drive_t *);
523 void (*resetproc)(ide_drive_t *);
524 void (*maskproc)(ide_drive_t *, int);
525 void (*quirkproc)(ide_drive_t *);
526
527 u8 (*mdma_filter)(ide_drive_t *);
528 u8 (*udma_filter)(ide_drive_t *);
529
530 u8 (*cable_detect)(struct hwif_s *);
531 };
532
533 struct ide_dma_ops {
534 void (*dma_host_set)(struct ide_drive_s *, int);
535 int (*dma_setup)(struct ide_drive_s *);
536 void (*dma_exec_cmd)(struct ide_drive_s *, u8);
537 void (*dma_start)(struct ide_drive_s *);
538 int (*dma_end)(struct ide_drive_s *);
539 int (*dma_test_irq)(struct ide_drive_s *);
540 void (*dma_lost_irq)(struct ide_drive_s *);
541 void (*dma_timeout)(struct ide_drive_s *);
542 };
543
544 struct ide_host;
545
546 typedef struct hwif_s {
547 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
548 struct hwif_s *mate; /* other hwif from same PCI chip */
549 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
550 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
551
552 struct ide_host *host;
553
554 char name[6]; /* name of interface, eg. "ide0" */
555
556 struct ide_io_ports io_ports;
557
558 unsigned long sata_scr[SATA_NR_PORTS];
559
560 ide_drive_t drives[MAX_DRIVES]; /* drive info */
561
562 u8 major; /* our major number */
563 u8 index; /* 0 for ide0; 1 for ide1; ... */
564 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
565 u8 bus_state; /* power state of the IDE bus */
566
567 u32 host_flags;
568
569 u8 pio_mask;
570
571 u8 ultra_mask;
572 u8 mwdma_mask;
573 u8 swdma_mask;
574
575 u8 cbl; /* cable type */
576
577 hwif_chipset_t chipset; /* sub-module for tuning.. */
578
579 struct device *dev;
580
581 ide_ack_intr_t *ack_intr;
582
583 void (*rw_disk)(ide_drive_t *, struct request *);
584
585 const struct ide_tp_ops *tp_ops;
586 const struct ide_port_ops *port_ops;
587 const struct ide_dma_ops *dma_ops;
588
589 void (*ide_dma_clear_irq)(ide_drive_t *drive);
590
591 /* dma physical region descriptor table (cpu view) */
592 unsigned int *dmatable_cpu;
593 /* dma physical region descriptor table (dma view) */
594 dma_addr_t dmatable_dma;
595 /* Scatter-gather list used to build the above */
596 struct scatterlist *sg_table;
597 int sg_max_nents; /* Maximum number of entries in it */
598 int sg_nents; /* Current number of entries in it */
599 int sg_dma_direction; /* dma transfer direction */
600
601 /* data phase of the active command (currently only valid for PIO/DMA) */
602 int data_phase;
603
604 unsigned int nsect;
605 unsigned int nleft;
606 struct scatterlist *cursg;
607 unsigned int cursg_ofs;
608
609 int rqsize; /* max sectors per request */
610 int irq; /* our irq number */
611
612 unsigned long dma_base; /* base addr for dma ports */
613
614 unsigned long config_data; /* for use by chipset-specific code */
615 unsigned long select_data; /* for use by chipset-specific code */
616
617 unsigned long extra_base; /* extra addr for dma ports */
618 unsigned extra_ports; /* number of extra dma ports */
619
620 unsigned present : 1; /* this interface exists */
621 unsigned serialized : 1; /* serialized all channel operation */
622 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
623 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
624
625 struct device gendev;
626 struct device *portdev;
627
628 struct completion gendev_rel_comp; /* To deal with device release() */
629
630 void *hwif_data; /* extra hwif data */
631
632 unsigned dma;
633
634 #ifdef CONFIG_BLK_DEV_IDEACPI
635 struct ide_acpi_hwif_link *acpidata;
636 #endif
637 } ____cacheline_internodealigned_in_smp ide_hwif_t;
638
639 struct ide_host {
640 ide_hwif_t *ports[MAX_HWIFS];
641 unsigned int n_ports;
642 struct device *dev[2];
643 unsigned long host_flags;
644 void *host_priv;
645 };
646
647 /*
648 * internal ide interrupt handler type
649 */
650 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
651 typedef int (ide_expiry_t)(ide_drive_t *);
652
653 /* used by ide-cd, ide-floppy, etc. */
654 typedef void (xfer_func_t)(ide_drive_t *, struct request *rq, void *, unsigned);
655
656 typedef struct hwgroup_s {
657 /* irq handler, if active */
658 ide_startstop_t (*handler)(ide_drive_t *);
659
660 /* BOOL: protects all fields below */
661 volatile int busy;
662 /* BOOL: wake us up on timer expiry */
663 unsigned int sleeping : 1;
664 /* BOOL: polling active & poll_timeout field valid */
665 unsigned int polling : 1;
666
667 /* current drive */
668 ide_drive_t *drive;
669 /* ptr to current hwif in linked-list */
670 ide_hwif_t *hwif;
671
672 /* current request */
673 struct request *rq;
674
675 /* failsafe timer */
676 struct timer_list timer;
677 /* timeout value during long polls */
678 unsigned long poll_timeout;
679 /* queried upon timeouts */
680 int (*expiry)(ide_drive_t *);
681
682 int req_gen;
683 int req_gen_timer;
684 } ide_hwgroup_t;
685
686 typedef struct ide_driver_s ide_driver_t;
687
688 extern struct mutex ide_setting_mtx;
689
690 int set_io_32bit(ide_drive_t *, int);
691 int set_pio_mode(ide_drive_t *, int);
692 int set_using_dma(ide_drive_t *, int);
693
694 /* ATAPI packet command flags */
695 enum {
696 /* set when an error is considered normal - no retry (ide-tape) */
697 PC_FLAG_ABORT = (1 << 0),
698 PC_FLAG_SUPPRESS_ERROR = (1 << 1),
699 PC_FLAG_WAIT_FOR_DSC = (1 << 2),
700 PC_FLAG_DMA_OK = (1 << 3),
701 PC_FLAG_DMA_IN_PROGRESS = (1 << 4),
702 PC_FLAG_DMA_ERROR = (1 << 5),
703 PC_FLAG_WRITING = (1 << 6),
704 /* command timed out */
705 PC_FLAG_TIMEDOUT = (1 << 7),
706 };
707
708 struct ide_atapi_pc {
709 /* actual packet bytes */
710 u8 c[12];
711 /* incremented on each retry */
712 int retries;
713 int error;
714
715 /* bytes to transfer */
716 int req_xfer;
717 /* bytes actually transferred */
718 int xferred;
719
720 /* data buffer */
721 u8 *buf;
722 /* current buffer position */
723 u8 *cur_pos;
724 int buf_size;
725 /* missing/available data on the current buffer */
726 int b_count;
727
728 /* the corresponding request */
729 struct request *rq;
730
731 unsigned long flags;
732
733 /*
734 * those are more or less driver-specific and some of them are subject
735 * to change/removal later.
736 */
737 u8 pc_buf[256];
738
739 /* idetape only */
740 struct idetape_bh *bh;
741 char *b_data;
742
743 /* idescsi only for now */
744 struct scatterlist *sg;
745 unsigned int sg_cnt;
746
747 struct scsi_cmnd *scsi_cmd;
748 void (*done) (struct scsi_cmnd *);
749
750 unsigned long timeout;
751 };
752
753 #ifdef CONFIG_IDE_PROC_FS
754 /*
755 * configurable drive settings
756 */
757
758 #define TYPE_INT 0
759 #define TYPE_BYTE 1
760 #define TYPE_SHORT 2
761
762 #define SETTING_READ (1 << 0)
763 #define SETTING_WRITE (1 << 1)
764 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
765
766 typedef int (ide_procset_t)(ide_drive_t *, int);
767 typedef struct ide_settings_s {
768 char *name;
769 int rw;
770 int data_type;
771 int min;
772 int max;
773 int mul_factor;
774 int div_factor;
775 void *data;
776 ide_procset_t *set;
777 int auto_remove;
778 struct ide_settings_s *next;
779 } ide_settings_t;
780
781 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
782
783 /*
784 * /proc/ide interface
785 */
786 typedef struct {
787 const char *name;
788 mode_t mode;
789 read_proc_t *read_proc;
790 write_proc_t *write_proc;
791 } ide_proc_entry_t;
792
793 void proc_ide_create(void);
794 void proc_ide_destroy(void);
795 void ide_proc_register_port(ide_hwif_t *);
796 void ide_proc_port_register_devices(ide_hwif_t *);
797 void ide_proc_unregister_device(ide_drive_t *);
798 void ide_proc_unregister_port(ide_hwif_t *);
799 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
800 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
801
802 void ide_add_generic_settings(ide_drive_t *);
803
804 read_proc_t proc_ide_read_capacity;
805 read_proc_t proc_ide_read_geometry;
806
807 /*
808 * Standard exit stuff:
809 */
810 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
811 { \
812 len -= off; \
813 if (len < count) { \
814 *eof = 1; \
815 if (len <= 0) \
816 return 0; \
817 } else \
818 len = count; \
819 *start = page + off; \
820 return len; \
821 }
822 #else
823 static inline void proc_ide_create(void) { ; }
824 static inline void proc_ide_destroy(void) { ; }
825 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
826 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
827 static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
828 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
829 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
830 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
831 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
832 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
833 #endif
834
835 /*
836 * Power Management step value (rq->pm->pm_step).
837 *
838 * The step value starts at 0 (ide_pm_state_start_suspend) for a
839 * suspend operation or 1000 (ide_pm_state_start_resume) for a
840 * resume operation.
841 *
842 * For each step, the core calls the subdriver start_power_step() first.
843 * This can return:
844 * - ide_stopped : In this case, the core calls us back again unless
845 * step have been set to ide_power_state_completed.
846 * - ide_started : In this case, the channel is left busy until an
847 * async event (interrupt) occurs.
848 * Typically, start_power_step() will issue a taskfile request with
849 * do_rw_taskfile().
850 *
851 * Upon reception of the interrupt, the core will call complete_power_step()
852 * with the error code if any. This routine should update the step value
853 * and return. It should not start a new request. The core will call
854 * start_power_step for the new step value, unless step have been set to
855 * ide_power_state_completed.
856 *
857 * Subdrivers are expected to define their own additional power
858 * steps from 1..999 for suspend and from 1001..1999 for resume,
859 * other values are reserved for future use.
860 */
861
862 enum {
863 ide_pm_state_completed = -1,
864 ide_pm_state_start_suspend = 0,
865 ide_pm_state_start_resume = 1000,
866 };
867
868 /*
869 * Subdrivers support.
870 *
871 * The gendriver.owner field should be set to the module owner of this driver.
872 * The gendriver.name field should be set to the name of this driver
873 */
874 struct ide_driver_s {
875 const char *version;
876 u8 media;
877 unsigned supports_dsc_overlap : 1;
878 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
879 int (*end_request)(ide_drive_t *, int, int);
880 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
881 struct device_driver gen_driver;
882 int (*probe)(ide_drive_t *);
883 void (*remove)(ide_drive_t *);
884 void (*resume)(ide_drive_t *);
885 void (*shutdown)(ide_drive_t *);
886 #ifdef CONFIG_IDE_PROC_FS
887 ide_proc_entry_t *proc;
888 #endif
889 };
890
891 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
892
893 int ide_device_get(ide_drive_t *);
894 void ide_device_put(ide_drive_t *);
895
896 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
897
898 extern int ide_vlb_clk;
899 extern int ide_pci_clk;
900
901 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
902 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
903 int uptodate, int nr_sectors);
904
905 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
906
907 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
908 ide_expiry_t *);
909
910 void ide_execute_pkt_cmd(ide_drive_t *);
911
912 void ide_pad_transfer(ide_drive_t *, int, int);
913
914 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
915
916 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
917
918 void ide_fix_driveid(u16 *);
919
920 extern void ide_fixstring(u8 *, const int, const int);
921
922 int ide_busy_sleep(ide_hwif_t *, unsigned long, int);
923
924 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
925
926 extern ide_startstop_t ide_do_reset (ide_drive_t *);
927
928 extern void ide_do_drive_cmd(ide_drive_t *, struct request *);
929
930 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
931
932 enum {
933 IDE_TFLAG_LBA48 = (1 << 0),
934 IDE_TFLAG_FLAGGED = (1 << 2),
935 IDE_TFLAG_OUT_DATA = (1 << 3),
936 IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
937 IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
938 IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
939 IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
940 IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
941 IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
942 IDE_TFLAG_OUT_HOB_NSECT |
943 IDE_TFLAG_OUT_HOB_LBAL |
944 IDE_TFLAG_OUT_HOB_LBAM |
945 IDE_TFLAG_OUT_HOB_LBAH,
946 IDE_TFLAG_OUT_FEATURE = (1 << 9),
947 IDE_TFLAG_OUT_NSECT = (1 << 10),
948 IDE_TFLAG_OUT_LBAL = (1 << 11),
949 IDE_TFLAG_OUT_LBAM = (1 << 12),
950 IDE_TFLAG_OUT_LBAH = (1 << 13),
951 IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
952 IDE_TFLAG_OUT_NSECT |
953 IDE_TFLAG_OUT_LBAL |
954 IDE_TFLAG_OUT_LBAM |
955 IDE_TFLAG_OUT_LBAH,
956 IDE_TFLAG_OUT_DEVICE = (1 << 14),
957 IDE_TFLAG_WRITE = (1 << 15),
958 IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16),
959 IDE_TFLAG_IN_DATA = (1 << 17),
960 IDE_TFLAG_CUSTOM_HANDLER = (1 << 18),
961 IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19),
962 IDE_TFLAG_IN_HOB_FEATURE = (1 << 20),
963 IDE_TFLAG_IN_HOB_NSECT = (1 << 21),
964 IDE_TFLAG_IN_HOB_LBAL = (1 << 22),
965 IDE_TFLAG_IN_HOB_LBAM = (1 << 23),
966 IDE_TFLAG_IN_HOB_LBAH = (1 << 24),
967 IDE_TFLAG_IN_HOB_LBA = IDE_TFLAG_IN_HOB_LBAL |
968 IDE_TFLAG_IN_HOB_LBAM |
969 IDE_TFLAG_IN_HOB_LBAH,
970 IDE_TFLAG_IN_HOB = IDE_TFLAG_IN_HOB_FEATURE |
971 IDE_TFLAG_IN_HOB_NSECT |
972 IDE_TFLAG_IN_HOB_LBA,
973 IDE_TFLAG_IN_FEATURE = (1 << 1),
974 IDE_TFLAG_IN_NSECT = (1 << 25),
975 IDE_TFLAG_IN_LBAL = (1 << 26),
976 IDE_TFLAG_IN_LBAM = (1 << 27),
977 IDE_TFLAG_IN_LBAH = (1 << 28),
978 IDE_TFLAG_IN_LBA = IDE_TFLAG_IN_LBAL |
979 IDE_TFLAG_IN_LBAM |
980 IDE_TFLAG_IN_LBAH,
981 IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT |
982 IDE_TFLAG_IN_LBA,
983 IDE_TFLAG_IN_DEVICE = (1 << 29),
984 IDE_TFLAG_HOB = IDE_TFLAG_OUT_HOB |
985 IDE_TFLAG_IN_HOB,
986 IDE_TFLAG_TF = IDE_TFLAG_OUT_TF |
987 IDE_TFLAG_IN_TF,
988 IDE_TFLAG_DEVICE = IDE_TFLAG_OUT_DEVICE |
989 IDE_TFLAG_IN_DEVICE,
990 /* force 16-bit I/O operations */
991 IDE_TFLAG_IO_16BIT = (1 << 30),
992 /* ide_task_t was allocated using kmalloc() */
993 IDE_TFLAG_DYN = (1 << 31),
994 };
995
996 struct ide_taskfile {
997 u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
998
999 u8 hob_feature; /* 1-5: additional data to support LBA48 */
1000 u8 hob_nsect;
1001 u8 hob_lbal;
1002 u8 hob_lbam;
1003 u8 hob_lbah;
1004
1005 u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
1006
1007 union { /*  7: */
1008 u8 error; /* read: error */
1009 u8 feature; /* write: feature */
1010 };
1011
1012 u8 nsect; /* 8: number of sectors */
1013 u8 lbal; /* 9: LBA low */
1014 u8 lbam; /* 10: LBA mid */
1015 u8 lbah; /* 11: LBA high */
1016
1017 u8 device; /* 12: device select */
1018
1019 union { /* 13: */
1020 u8 status; /*  read: status  */
1021 u8 command; /* write: command */
1022 };
1023 };
1024
1025 typedef struct ide_task_s {
1026 union {
1027 struct ide_taskfile tf;
1028 u8 tf_array[14];
1029 };
1030 u32 tf_flags;
1031 int data_phase;
1032 struct request *rq; /* copy of request */
1033 void *special; /* valid_t generally */
1034 } ide_task_t;
1035
1036 void ide_tf_dump(const char *, struct ide_taskfile *);
1037
1038 void ide_exec_command(ide_hwif_t *, u8);
1039 u8 ide_read_status(ide_hwif_t *);
1040 u8 ide_read_altstatus(ide_hwif_t *);
1041 u8 ide_read_sff_dma_status(ide_hwif_t *);
1042
1043 void ide_set_irq(ide_hwif_t *, int);
1044
1045 void ide_tf_load(ide_drive_t *, ide_task_t *);
1046 void ide_tf_read(ide_drive_t *, ide_task_t *);
1047
1048 void ide_input_data(ide_drive_t *, struct request *, void *, unsigned int);
1049 void ide_output_data(ide_drive_t *, struct request *, void *, unsigned int);
1050
1051 extern void SELECT_DRIVE(ide_drive_t *);
1052 void SELECT_MASK(ide_drive_t *, int);
1053
1054 u8 ide_read_error(ide_drive_t *);
1055 void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
1056
1057 extern int drive_is_ready(ide_drive_t *);
1058
1059 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
1060
1061 ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
1062 ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
1063 void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
1064 void (*retry_pc)(ide_drive_t *), void (*dsc_handle)(ide_drive_t *),
1065 void (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned int,
1066 int));
1067 ide_startstop_t ide_transfer_pc(ide_drive_t *, struct ide_atapi_pc *,
1068 ide_handler_t *, unsigned int, ide_expiry_t *);
1069 ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_atapi_pc *,
1070 ide_handler_t *, unsigned int, ide_expiry_t *);
1071
1072 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1073
1074 void task_end_request(ide_drive_t *, struct request *, u8);
1075
1076 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
1077 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
1078
1079 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1080 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1081 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1082
1083 extern int ide_driveid_update(ide_drive_t *);
1084 extern int ide_config_drive_speed(ide_drive_t *, u8);
1085 extern u8 eighty_ninty_three (ide_drive_t *);
1086 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1087
1088 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1089
1090 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1091
1092 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1093 extern void ide_timer_expiry(unsigned long);
1094 extern irqreturn_t ide_intr(int irq, void *dev_id);
1095 extern void do_ide_request(struct request_queue *);
1096
1097 void ide_init_disk(struct gendisk *, ide_drive_t *);
1098
1099 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1100 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1101 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1102 #else
1103 #define ide_pci_register_driver(d) pci_register_driver(d)
1104 #endif
1105
1106 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int,
1107 hw_regs_t *, hw_regs_t **);
1108 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1109
1110 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1111 int ide_pci_set_master(struct pci_dev *, const char *);
1112 unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
1113 int ide_pci_check_simplex(ide_hwif_t *, const struct ide_port_info *);
1114 int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
1115 #else
1116 static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
1117 const struct ide_port_info *d)
1118 {
1119 return -EINVAL;
1120 }
1121 #endif
1122
1123 typedef struct ide_pci_enablebit_s {
1124 u8 reg; /* byte pci reg holding the enable-bit */
1125 u8 mask; /* mask to isolate the enable-bit */
1126 u8 val; /* value of masked reg when "enabled" */
1127 } ide_pci_enablebit_t;
1128
1129 enum {
1130 /* Uses ISA control ports not PCI ones. */
1131 IDE_HFLAG_ISA_PORTS = (1 << 0),
1132 /* single port device */
1133 IDE_HFLAG_SINGLE = (1 << 1),
1134 /* don't use legacy PIO blacklist */
1135 IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
1136 /* set for the second port of QD65xx */
1137 IDE_HFLAG_QD_2ND_PORT = (1 << 3),
1138 /* use PIO8/9 for prefetch off/on */
1139 IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
1140 /* use PIO6/7 for fast-devsel off/on */
1141 IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
1142 /* use 100-102 and 200-202 PIO values to set DMA modes */
1143 IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
1144 /*
1145 * keep DMA setting when programming PIO mode, may be used only
1146 * for hosts which have separate PIO and DMA timings (ie. PMAC)
1147 */
1148 IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1149 /* program host for the transfer mode after programming device */
1150 IDE_HFLAG_POST_SET_MODE = (1 << 8),
1151 /* don't program host/device for the transfer mode ("smart" hosts) */
1152 IDE_HFLAG_NO_SET_MODE = (1 << 9),
1153 /* trust BIOS for programming chipset/device for DMA */
1154 IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
1155 /* host is CS5510/CS5520 */
1156 IDE_HFLAG_CS5520 = (1 << 11),
1157 /* ATAPI DMA is unsupported */
1158 IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
1159 /* set if host is a "non-bootable" controller */
1160 IDE_HFLAG_NON_BOOTABLE = (1 << 13),
1161 /* host doesn't support DMA */
1162 IDE_HFLAG_NO_DMA = (1 << 14),
1163 /* check if host is PCI IDE device before allowing DMA */
1164 IDE_HFLAG_NO_AUTODMA = (1 << 15),
1165 /* host uses MMIO */
1166 IDE_HFLAG_MMIO = (1 << 16),
1167 /* no LBA48 */
1168 IDE_HFLAG_NO_LBA48 = (1 << 17),
1169 /* no LBA48 DMA */
1170 IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
1171 /* data FIFO is cleared by an error */
1172 IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
1173 /* serialize ports */
1174 IDE_HFLAG_SERIALIZE = (1 << 20),
1175 /* use legacy IRQs */
1176 IDE_HFLAG_LEGACY_IRQS = (1 << 21),
1177 /* force use of legacy IRQs */
1178 IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
1179 /* limit LBA48 requests to 256 sectors */
1180 IDE_HFLAG_RQSIZE_256 = (1 << 23),
1181 /* use 32-bit I/O ops */
1182 IDE_HFLAG_IO_32BIT = (1 << 24),
1183 /* unmask IRQs */
1184 IDE_HFLAG_UNMASK_IRQS = (1 << 25),
1185 /* serialize ports if DMA is possible (for sl82c105) */
1186 IDE_HFLAG_SERIALIZE_DMA = (1 << 27),
1187 /* force host out of "simplex" mode */
1188 IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
1189 /* DSC overlap is unsupported */
1190 IDE_HFLAG_NO_DSC = (1 << 29),
1191 /* never use 32-bit I/O ops */
1192 IDE_HFLAG_NO_IO_32BIT = (1 << 30),
1193 /* never unmask IRQs */
1194 IDE_HFLAG_NO_UNMASK_IRQS = (1 << 31),
1195 };
1196
1197 #ifdef CONFIG_BLK_DEV_OFFBOARD
1198 # define IDE_HFLAG_OFF_BOARD 0
1199 #else
1200 # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_NON_BOOTABLE
1201 #endif
1202
1203 struct ide_port_info {
1204 char *name;
1205 unsigned int (*init_chipset)(struct pci_dev *);
1206 void (*init_iops)(ide_hwif_t *);
1207 void (*init_hwif)(ide_hwif_t *);
1208 int (*init_dma)(ide_hwif_t *,
1209 const struct ide_port_info *);
1210
1211 const struct ide_tp_ops *tp_ops;
1212 const struct ide_port_ops *port_ops;
1213 const struct ide_dma_ops *dma_ops;
1214
1215 ide_pci_enablebit_t enablebits[2];
1216 hwif_chipset_t chipset;
1217 u32 host_flags;
1218 u8 pio_mask;
1219 u8 swdma_mask;
1220 u8 mwdma_mask;
1221 u8 udma_mask;
1222 };
1223
1224 int ide_pci_init_one(struct pci_dev *, const struct ide_port_info *, void *);
1225 int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
1226 const struct ide_port_info *, void *);
1227 void ide_pci_remove(struct pci_dev *);
1228
1229 void ide_map_sg(ide_drive_t *, struct request *);
1230 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1231
1232 #define BAD_DMA_DRIVE 0
1233 #define GOOD_DMA_DRIVE 1
1234
1235 struct drive_list_entry {
1236 const char *id_model;
1237 const char *id_firmware;
1238 };
1239
1240 int ide_in_drive_list(u16 *, const struct drive_list_entry *);
1241
1242 #ifdef CONFIG_BLK_DEV_IDEDMA
1243 int __ide_dma_bad_drive(ide_drive_t *);
1244 int ide_id_dma_bug(ide_drive_t *);
1245
1246 u8 ide_find_dma_mode(ide_drive_t *, u8);
1247
1248 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1249 {
1250 return ide_find_dma_mode(drive, XFER_UDMA_6);
1251 }
1252
1253 void ide_dma_off_quietly(ide_drive_t *);
1254 void ide_dma_off(ide_drive_t *);
1255 void ide_dma_on(ide_drive_t *);
1256 int ide_set_dma(ide_drive_t *);
1257 void ide_check_dma_crc(ide_drive_t *);
1258 ide_startstop_t ide_dma_intr(ide_drive_t *);
1259
1260 int ide_build_sglist(ide_drive_t *, struct request *);
1261 void ide_destroy_dmatable(ide_drive_t *);
1262
1263 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1264 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1265 int ide_allocate_dma_engine(ide_hwif_t *);
1266 void ide_release_dma_engine(ide_hwif_t *);
1267
1268 void ide_dma_host_set(ide_drive_t *, int);
1269 extern int ide_dma_setup(ide_drive_t *);
1270 void ide_dma_exec_cmd(ide_drive_t *, u8);
1271 extern void ide_dma_start(ide_drive_t *);
1272 extern int __ide_dma_end(ide_drive_t *);
1273 int ide_dma_test_irq(ide_drive_t *);
1274 extern void ide_dma_lost_irq(ide_drive_t *);
1275 extern void ide_dma_timeout(ide_drive_t *);
1276 extern const struct ide_dma_ops sff_dma_ops;
1277 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1278
1279 #else
1280 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1281 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1282 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1283 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1284 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1285 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1286 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1287 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1288 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1289 #endif /* CONFIG_BLK_DEV_IDEDMA */
1290
1291 #ifndef CONFIG_BLK_DEV_IDEDMA_SFF
1292 static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
1293 #endif
1294
1295 #ifdef CONFIG_BLK_DEV_IDEACPI
1296 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1297 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1298 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1299 extern void ide_acpi_init(ide_hwif_t *hwif);
1300 void ide_acpi_port_init_devices(ide_hwif_t *);
1301 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1302 #else
1303 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1304 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1305 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1306 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1307 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1308 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1309 #endif
1310
1311 void ide_remove_port_from_hwgroup(ide_hwif_t *);
1312 void ide_unregister(ide_hwif_t *);
1313
1314 void ide_register_region(struct gendisk *);
1315 void ide_unregister_region(struct gendisk *);
1316
1317 void ide_undecoded_slave(ide_drive_t *);
1318
1319 void ide_port_apply_params(ide_hwif_t *);
1320
1321 struct ide_host *ide_host_alloc_all(const struct ide_port_info *, hw_regs_t **);
1322 struct ide_host *ide_host_alloc(const struct ide_port_info *, hw_regs_t **);
1323 void ide_host_free(struct ide_host *);
1324 int ide_host_register(struct ide_host *, const struct ide_port_info *,
1325 hw_regs_t **);
1326 int ide_host_add(const struct ide_port_info *, hw_regs_t **,
1327 struct ide_host **);
1328 void ide_host_remove(struct ide_host *);
1329 int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
1330 void ide_port_unregister_devices(ide_hwif_t *);
1331 void ide_port_scan(ide_hwif_t *);
1332
1333 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1334 {
1335 return hwif->hwif_data;
1336 }
1337
1338 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1339 {
1340 hwif->hwif_data = data;
1341 }
1342
1343 const char *ide_xfer_verbose(u8 mode);
1344 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1345 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1346
1347 static inline int ide_dev_has_iordy(u16 *id)
1348 {
1349 return ((id[ATA_ID_FIELD_VALID] & 2) && ata_id_has_iordy(id)) ? 1 : 0;
1350 }
1351
1352 static inline int ide_dev_is_sata(u16 *id)
1353 {
1354 /*
1355 * See if word 93 is 0 AND drive is at least ATA-5 compatible
1356 * verifying that word 80 by casting it to a signed type --
1357 * this trick allows us to filter out the reserved values of
1358 * 0x0000 and 0xffff along with the earlier ATA revisions...
1359 */
1360 if (id[ATA_ID_HW_CONFIG] == 0 && (short)id[ATA_ID_MAJOR_VER] >= 0x0020)
1361 return 1;
1362 return 0;
1363 }
1364
1365 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1366 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1367
1368 struct ide_timing {
1369 u8 mode;
1370 u8 setup; /* t1 */
1371 u16 act8b; /* t2 for 8-bit io */
1372 u16 rec8b; /* t2i for 8-bit io */
1373 u16 cyc8b; /* t0 for 8-bit io */
1374 u16 active; /* t2 or tD */
1375 u16 recover; /* t2i or tK */
1376 u16 cycle; /* t0 */
1377 u16 udma; /* t2CYCTYP/2 */
1378 };
1379
1380 enum {
1381 IDE_TIMING_SETUP = (1 << 0),
1382 IDE_TIMING_ACT8B = (1 << 1),
1383 IDE_TIMING_REC8B = (1 << 2),
1384 IDE_TIMING_CYC8B = (1 << 3),
1385 IDE_TIMING_8BIT = IDE_TIMING_ACT8B | IDE_TIMING_REC8B |
1386 IDE_TIMING_CYC8B,
1387 IDE_TIMING_ACTIVE = (1 << 4),
1388 IDE_TIMING_RECOVER = (1 << 5),
1389 IDE_TIMING_CYCLE = (1 << 6),
1390 IDE_TIMING_UDMA = (1 << 7),
1391 IDE_TIMING_ALL = IDE_TIMING_SETUP | IDE_TIMING_8BIT |
1392 IDE_TIMING_ACTIVE | IDE_TIMING_RECOVER |
1393 IDE_TIMING_CYCLE | IDE_TIMING_UDMA,
1394 };
1395
1396 struct ide_timing *ide_timing_find_mode(u8);
1397 u16 ide_pio_cycle_time(ide_drive_t *, u8);
1398 void ide_timing_merge(struct ide_timing *, struct ide_timing *,
1399 struct ide_timing *, unsigned int);
1400 int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
1401
1402 int ide_scan_pio_blacklist(char *);
1403
1404 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1405
1406 int ide_set_pio_mode(ide_drive_t *, u8);
1407 int ide_set_dma_mode(ide_drive_t *, u8);
1408
1409 void ide_set_pio(ide_drive_t *, u8);
1410
1411 static inline void ide_set_max_pio(ide_drive_t *drive)
1412 {
1413 ide_set_pio(drive, 255);
1414 }
1415
1416 extern spinlock_t ide_lock;
1417 extern struct mutex ide_cfg_mtx;
1418 /*
1419 * Structure locking:
1420 *
1421 * ide_cfg_mtx and ide_lock together protect changes to
1422 * ide_hwif_t->{next,hwgroup}
1423 * ide_drive_t->next
1424 *
1425 * ide_hwgroup_t->busy: ide_lock
1426 * ide_hwgroup_t->hwif: ide_lock
1427 * ide_hwif_t->mate: constant, no locking
1428 * ide_drive_t->hwif: constant, no locking
1429 */
1430
1431 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1432
1433 extern struct bus_type ide_bus_type;
1434 extern struct class *ide_port_class;
1435
1436 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1437 #define ide_id_has_flush_cache(id) ((id)[ATA_ID_CFS_ENABLE_2] & 0x3000)
1438
1439 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1440 #define ide_id_has_flush_cache_ext(id) \
1441 (((id)[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400)
1442
1443 static inline void ide_dump_identify(u8 *id)
1444 {
1445 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1446 }
1447
1448 static inline int hwif_to_node(ide_hwif_t *hwif)
1449 {
1450 return hwif->dev ? dev_to_node(hwif->dev) : -1;
1451 }
1452
1453 static inline ide_drive_t *ide_get_pair_dev(ide_drive_t *drive)
1454 {
1455 ide_drive_t *peer = &drive->hwif->drives[(drive->dn ^ 1) & 1];
1456
1457 return peer->present ? peer : NULL;
1458 }
1459 #endif /* _IDE_H */
Linux kernel - Deliverables
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