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TOMOYO Linux Cross Reference
Linux/include/linux/ide.h

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  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/pci.h>
 18 #include <linux/completion.h>
 19 #include <linux/pm.h>
 20 #include <linux/mutex.h>
 21 /* for request_sense */
 22 #include <linux/cdrom.h>
 23 #include <scsi/scsi_cmnd.h>
 24 #include <asm/byteorder.h>
 25 #include <asm/io.h>
 26 
 27 #if defined(CONFIG_CRIS) || defined(CONFIG_FRV) || defined(CONFIG_MN10300)
 28 # define SUPPORT_VLB_SYNC 0
 29 #else
 30 # define SUPPORT_VLB_SYNC 1
 31 #endif
 32 
 33 /*
 34  * Probably not wise to fiddle with these
 35  */
 36 #define IDE_DEFAULT_MAX_FAILURES        1
 37 #define ERROR_MAX       8       /* Max read/write errors per sector */
 38 #define ERROR_RESET     3       /* Reset controller every 4th retry */
 39 #define ERROR_RECAL     1       /* Recalibrate every 2nd retry */
 40 
 41 struct device;
 42 
 43 /* values for ide_request.type */
 44 enum ata_priv_type {
 45         ATA_PRIV_MISC,
 46         ATA_PRIV_TASKFILE,
 47         ATA_PRIV_PC,
 48         ATA_PRIV_SENSE,         /* sense request */
 49         ATA_PRIV_PM_SUSPEND,    /* suspend request */
 50         ATA_PRIV_PM_RESUME,     /* resume request */
 51 };
 52 
 53 struct ide_request {
 54         struct scsi_request sreq;
 55         u8 sense[SCSI_SENSE_BUFFERSIZE];
 56         u8 type;
 57 };
 58 
 59 static inline struct ide_request *ide_req(struct request *rq)
 60 {
 61         return blk_mq_rq_to_pdu(rq);
 62 }
 63 
 64 static inline bool ata_misc_request(struct request *rq)
 65 {
 66         return blk_rq_is_private(rq) && ide_req(rq)->type == ATA_PRIV_MISC;
 67 }
 68 
 69 static inline bool ata_taskfile_request(struct request *rq)
 70 {
 71         return blk_rq_is_private(rq) && ide_req(rq)->type == ATA_PRIV_TASKFILE;
 72 }
 73 
 74 static inline bool ata_pc_request(struct request *rq)
 75 {
 76         return blk_rq_is_private(rq) && ide_req(rq)->type == ATA_PRIV_PC;
 77 }
 78 
 79 static inline bool ata_sense_request(struct request *rq)
 80 {
 81         return blk_rq_is_private(rq) && ide_req(rq)->type == ATA_PRIV_SENSE;
 82 }
 83 
 84 static inline bool ata_pm_request(struct request *rq)
 85 {
 86         return blk_rq_is_private(rq) &&
 87                 (ide_req(rq)->type == ATA_PRIV_PM_SUSPEND ||
 88                  ide_req(rq)->type == ATA_PRIV_PM_RESUME);
 89 }
 90 
 91 /* Error codes returned in result to the higher part of the driver. */
 92 enum {
 93         IDE_DRV_ERROR_GENERAL   = 101,
 94         IDE_DRV_ERROR_FILEMARK  = 102,
 95         IDE_DRV_ERROR_EOD       = 103,
 96 };
 97 
 98 /*
 99  * Definitions for accessing IDE controller registers
100  */
101 #define IDE_NR_PORTS            (10)
102 
103 struct ide_io_ports {
104         unsigned long   data_addr;
105 
106         union {
107                 unsigned long error_addr;       /*   read:  error */
108                 unsigned long feature_addr;     /*  write: feature */
109         };
110 
111         unsigned long   nsect_addr;
112         unsigned long   lbal_addr;
113         unsigned long   lbam_addr;
114         unsigned long   lbah_addr;
115 
116         unsigned long   device_addr;
117 
118         union {
119                 unsigned long status_addr;      /*  read: status  */
120                 unsigned long command_addr;     /* write: command */
121         };
122 
123         unsigned long   ctl_addr;
124 
125         unsigned long   irq_addr;
126 };
127 
128 #define OK_STAT(stat,good,bad)  (((stat)&((good)|(bad)))==(good))
129 
130 #define BAD_R_STAT      (ATA_BUSY | ATA_ERR)
131 #define BAD_W_STAT      (BAD_R_STAT | ATA_DF)
132 #define BAD_STAT        (BAD_R_STAT | ATA_DRQ)
133 #define DRIVE_READY     (ATA_DRDY | ATA_DSC)
134 
135 #define BAD_CRC         (ATA_ABORTED | ATA_ICRC)
136 
137 #define SATA_NR_PORTS           (3)     /* 16 possible ?? */
138 
139 #define SATA_STATUS_OFFSET      (0)
140 #define SATA_ERROR_OFFSET       (1)
141 #define SATA_CONTROL_OFFSET     (2)
142 
143 /*
144  * Our Physical Region Descriptor (PRD) table should be large enough
145  * to handle the biggest I/O request we are likely to see.  Since requests
146  * can have no more than 256 sectors, and since the typical blocksize is
147  * two or more sectors, we could get by with a limit of 128 entries here for
148  * the usual worst case.  Most requests seem to include some contiguous blocks,
149  * further reducing the number of table entries required.
150  *
151  * The driver reverts to PIO mode for individual requests that exceed
152  * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
153  * 100% of all crazy scenarios here is not necessary.
154  *
155  * As it turns out though, we must allocate a full 4KB page for this,
156  * so the two PRD tables (ide0 & ide1) will each get half of that,
157  * allowing each to have about 256 entries (8 bytes each) from this.
158  */
159 #define PRD_BYTES       8
160 #define PRD_ENTRIES     256
161 
162 /*
163  * Some more useful definitions
164  */
165 #define PARTN_BITS      6       /* number of minor dev bits for partitions */
166 #define MAX_DRIVES      2       /* per interface; 2 assumed by lots of code */
167 #define SECTOR_SIZE     512
168 
169 /*
170  * Timeouts for various operations:
171  */
172 enum {
173         /* spec allows up to 20ms, but CF cards and SSD drives need more */
174         WAIT_DRQ        = 1 * HZ,       /* 1s */
175         /* some laptops are very slow */
176         WAIT_READY      = 5 * HZ,       /* 5s */
177         /* should be less than 3ms (?), if all ATAPI CD is closed at boot */
178         WAIT_PIDENTIFY  = 10 * HZ,      /* 10s */
179         /* worst case when spinning up */
180         WAIT_WORSTCASE  = 30 * HZ,      /* 30s */
181         /* maximum wait for an IRQ to happen */
182         WAIT_CMD        = 10 * HZ,      /* 10s */
183         /* Some drives require a longer IRQ timeout. */
184         WAIT_FLOPPY_CMD = 50 * HZ,      /* 50s */
185         /*
186          * Some drives (for example, Seagate STT3401A Travan) require a very
187          * long timeout, because they don't return an interrupt or clear their
188          * BSY bit until after the command completes (even retension commands).
189          */
190         WAIT_TAPE_CMD   = 900 * HZ,     /* 900s */
191         /* minimum sleep time */
192         WAIT_MIN_SLEEP  = HZ / 50,      /* 20ms */
193 };
194 
195 /*
196  * Op codes for special requests to be handled by ide_special_rq().
197  * Values should be in the range of 0x20 to 0x3f.
198  */
199 #define REQ_DRIVE_RESET         0x20
200 #define REQ_DEVSET_EXEC         0x21
201 #define REQ_PARK_HEADS          0x22
202 #define REQ_UNPARK_HEADS        0x23
203 
204 /*
205  * hwif_chipset_t is used to keep track of the specific hardware
206  * chipset used by each IDE interface, if known.
207  */
208 enum {          ide_unknown,    ide_generic,    ide_pci,
209                 ide_cmd640,     ide_dtc2278,    ide_ali14xx,
210                 ide_qd65xx,     ide_umc8672,    ide_ht6560b,
211                 ide_4drives,    ide_pmac,       ide_acorn,
212                 ide_au1xxx,     ide_palm3710
213 };
214 
215 typedef u8 hwif_chipset_t;
216 
217 /*
218  * Structure to hold all information about the location of this port
219  */
220 struct ide_hw {
221         union {
222                 struct ide_io_ports     io_ports;
223                 unsigned long           io_ports_array[IDE_NR_PORTS];
224         };
225 
226         int             irq;                    /* our irq number */
227         struct device   *dev, *parent;
228         unsigned long   config;
229 };
230 
231 static inline void ide_std_init_ports(struct ide_hw *hw,
232                                       unsigned long io_addr,
233                                       unsigned long ctl_addr)
234 {
235         unsigned int i;
236 
237         for (i = 0; i <= 7; i++)
238                 hw->io_ports_array[i] = io_addr++;
239 
240         hw->io_ports.ctl_addr = ctl_addr;
241 }
242 
243 #define MAX_HWIFS       10
244 
245 /*
246  * Now for the data we need to maintain per-drive:  ide_drive_t
247  */
248 
249 #define ide_scsi        0x21
250 #define ide_disk        0x20
251 #define ide_optical     0x7
252 #define ide_cdrom       0x5
253 #define ide_tape        0x1
254 #define ide_floppy      0x0
255 
256 /*
257  * Special Driver Flags
258  */
259 enum {
260         IDE_SFLAG_SET_GEOMETRY          = (1 << 0),
261         IDE_SFLAG_RECALIBRATE           = (1 << 1),
262         IDE_SFLAG_SET_MULTMODE          = (1 << 2),
263 };
264 
265 /*
266  * Status returned from various ide_ functions
267  */
268 typedef enum {
269         ide_stopped,    /* no drive operation was started */
270         ide_started,    /* a drive operation was started, handler was set */
271 } ide_startstop_t;
272 
273 enum {
274         IDE_VALID_ERROR                 = (1 << 1),
275         IDE_VALID_FEATURE               = IDE_VALID_ERROR,
276         IDE_VALID_NSECT                 = (1 << 2),
277         IDE_VALID_LBAL                  = (1 << 3),
278         IDE_VALID_LBAM                  = (1 << 4),
279         IDE_VALID_LBAH                  = (1 << 5),
280         IDE_VALID_DEVICE                = (1 << 6),
281         IDE_VALID_LBA                   = IDE_VALID_LBAL |
282                                           IDE_VALID_LBAM |
283                                           IDE_VALID_LBAH,
284         IDE_VALID_OUT_TF                = IDE_VALID_FEATURE |
285                                           IDE_VALID_NSECT |
286                                           IDE_VALID_LBA,
287         IDE_VALID_IN_TF                 = IDE_VALID_NSECT |
288                                           IDE_VALID_LBA,
289         IDE_VALID_OUT_HOB               = IDE_VALID_OUT_TF,
290         IDE_VALID_IN_HOB                = IDE_VALID_ERROR |
291                                           IDE_VALID_NSECT |
292                                           IDE_VALID_LBA,
293 };
294 
295 enum {
296         IDE_TFLAG_LBA48                 = (1 << 0),
297         IDE_TFLAG_WRITE                 = (1 << 1),
298         IDE_TFLAG_CUSTOM_HANDLER        = (1 << 2),
299         IDE_TFLAG_DMA_PIO_FALLBACK      = (1 << 3),
300         /* force 16-bit I/O operations */
301         IDE_TFLAG_IO_16BIT              = (1 << 4),
302         /* struct ide_cmd was allocated using kmalloc() */
303         IDE_TFLAG_DYN                   = (1 << 5),
304         IDE_TFLAG_FS                    = (1 << 6),
305         IDE_TFLAG_MULTI_PIO             = (1 << 7),
306         IDE_TFLAG_SET_XFER              = (1 << 8),
307 };
308 
309 enum {
310         IDE_FTFLAG_FLAGGED              = (1 << 0),
311         IDE_FTFLAG_SET_IN_FLAGS         = (1 << 1),
312         IDE_FTFLAG_OUT_DATA             = (1 << 2),
313         IDE_FTFLAG_IN_DATA              = (1 << 3),
314 };
315 
316 struct ide_taskfile {
317         u8      data;           /* 0: data byte (for TASKFILE ioctl) */
318         union {                 /* 1: */
319                 u8 error;       /*  read: error */
320                 u8 feature;     /* write: feature */
321         };
322         u8      nsect;          /* 2: number of sectors */
323         u8      lbal;           /* 3: LBA low */
324         u8      lbam;           /* 4: LBA mid */
325         u8      lbah;           /* 5: LBA high */
326         u8      device;         /* 6: device select */
327         union {                 /* 7: */
328                 u8 status;      /*  read: status */
329                 u8 command;     /* write: command */
330         };
331 };
332 
333 struct ide_cmd {
334         struct ide_taskfile     tf;
335         struct ide_taskfile     hob;
336         struct {
337                 struct {
338                         u8              tf;
339                         u8              hob;
340                 } out, in;
341         } valid;
342 
343         u16                     tf_flags;
344         u8                      ftf_flags;      /* for TASKFILE ioctl */
345         int                     protocol;
346 
347         int                     sg_nents;         /* number of sg entries */
348         int                     orig_sg_nents;
349         int                     sg_dma_direction; /* DMA transfer direction */
350 
351         unsigned int            nbytes;
352         unsigned int            nleft;
353         unsigned int            last_xfer_len;
354 
355         struct scatterlist      *cursg;
356         unsigned int            cursg_ofs;
357 
358         struct request          *rq;            /* copy of request */
359 };
360 
361 /* ATAPI packet command flags */
362 enum {
363         /* set when an error is considered normal - no retry (ide-tape) */
364         PC_FLAG_ABORT                   = (1 << 0),
365         PC_FLAG_SUPPRESS_ERROR          = (1 << 1),
366         PC_FLAG_WAIT_FOR_DSC            = (1 << 2),
367         PC_FLAG_DMA_OK                  = (1 << 3),
368         PC_FLAG_DMA_IN_PROGRESS         = (1 << 4),
369         PC_FLAG_DMA_ERROR               = (1 << 5),
370         PC_FLAG_WRITING                 = (1 << 6),
371 };
372 
373 #define ATAPI_WAIT_PC           (60 * HZ)
374 
375 struct ide_atapi_pc {
376         /* actual packet bytes */
377         u8 c[12];
378         /* incremented on each retry */
379         int retries;
380         int error;
381 
382         /* bytes to transfer */
383         int req_xfer;
384 
385         /* the corresponding request */
386         struct request *rq;
387 
388         unsigned long flags;
389 
390         /*
391          * those are more or less driver-specific and some of them are subject
392          * to change/removal later.
393          */
394         unsigned long timeout;
395 };
396 
397 struct ide_devset;
398 struct ide_driver;
399 
400 #ifdef CONFIG_BLK_DEV_IDEACPI
401 struct ide_acpi_drive_link;
402 struct ide_acpi_hwif_link;
403 #endif
404 
405 struct ide_drive_s;
406 
407 struct ide_disk_ops {
408         int             (*check)(struct ide_drive_s *, const char *);
409         int             (*get_capacity)(struct ide_drive_s *);
410         void            (*unlock_native_capacity)(struct ide_drive_s *);
411         void            (*setup)(struct ide_drive_s *);
412         void            (*flush)(struct ide_drive_s *);
413         int             (*init_media)(struct ide_drive_s *, struct gendisk *);
414         int             (*set_doorlock)(struct ide_drive_s *, struct gendisk *,
415                                         int);
416         ide_startstop_t (*do_request)(struct ide_drive_s *, struct request *,
417                                       sector_t);
418         int             (*ioctl)(struct ide_drive_s *, struct block_device *,
419                                  fmode_t, unsigned int, unsigned long);
420 };
421 
422 /* ATAPI device flags */
423 enum {
424         IDE_AFLAG_DRQ_INTERRUPT         = (1 << 0),
425 
426         /* ide-cd */
427         /* Drive cannot eject the disc. */
428         IDE_AFLAG_NO_EJECT              = (1 << 1),
429         /* Drive is a pre ATAPI 1.2 drive. */
430         IDE_AFLAG_PRE_ATAPI12           = (1 << 2),
431         /* TOC addresses are in BCD. */
432         IDE_AFLAG_TOCADDR_AS_BCD        = (1 << 3),
433         /* TOC track numbers are in BCD. */
434         IDE_AFLAG_TOCTRACKS_AS_BCD      = (1 << 4),
435         /* Saved TOC information is current. */
436         IDE_AFLAG_TOC_VALID             = (1 << 6),
437         /* We think that the drive door is locked. */
438         IDE_AFLAG_DOOR_LOCKED           = (1 << 7),
439         /* SET_CD_SPEED command is unsupported. */
440         IDE_AFLAG_NO_SPEED_SELECT       = (1 << 8),
441         IDE_AFLAG_VERTOS_300_SSD        = (1 << 9),
442         IDE_AFLAG_VERTOS_600_ESD        = (1 << 10),
443         IDE_AFLAG_SANYO_3CD             = (1 << 11),
444         IDE_AFLAG_FULL_CAPS_PAGE        = (1 << 12),
445         IDE_AFLAG_PLAY_AUDIO_OK         = (1 << 13),
446         IDE_AFLAG_LE_SPEED_FIELDS       = (1 << 14),
447 
448         /* ide-floppy */
449         /* Avoid commands not supported in Clik drive */
450         IDE_AFLAG_CLIK_DRIVE            = (1 << 15),
451         /* Requires BH algorithm for packets */
452         IDE_AFLAG_ZIP_DRIVE             = (1 << 16),
453         /* Supports format progress report */
454         IDE_AFLAG_SRFP                  = (1 << 17),
455 
456         /* ide-tape */
457         IDE_AFLAG_IGNORE_DSC            = (1 << 18),
458         /* 0 When the tape position is unknown */
459         IDE_AFLAG_ADDRESS_VALID         = (1 << 19),
460         /* Device already opened */
461         IDE_AFLAG_BUSY                  = (1 << 20),
462         /* Attempt to auto-detect the current user block size */
463         IDE_AFLAG_DETECT_BS             = (1 << 21),
464         /* Currently on a filemark */
465         IDE_AFLAG_FILEMARK              = (1 << 22),
466         /* 0 = no tape is loaded, so we don't rewind after ejecting */
467         IDE_AFLAG_MEDIUM_PRESENT        = (1 << 23),
468 
469         IDE_AFLAG_NO_AUTOCLOSE          = (1 << 24),
470 };
471 
472 /* device flags */
473 enum {
474         /* restore settings after device reset */
475         IDE_DFLAG_KEEP_SETTINGS         = (1 << 0),
476         /* device is using DMA for read/write */
477         IDE_DFLAG_USING_DMA             = (1 << 1),
478         /* okay to unmask other IRQs */
479         IDE_DFLAG_UNMASK                = (1 << 2),
480         /* don't attempt flushes */
481         IDE_DFLAG_NOFLUSH               = (1 << 3),
482         /* DSC overlap */
483         IDE_DFLAG_DSC_OVERLAP           = (1 << 4),
484         /* give potential excess bandwidth */
485         IDE_DFLAG_NICE1                 = (1 << 5),
486         /* device is physically present */
487         IDE_DFLAG_PRESENT               = (1 << 6),
488         /* disable Host Protected Area */
489         IDE_DFLAG_NOHPA                 = (1 << 7),
490         /* id read from device (synthetic if not set) */
491         IDE_DFLAG_ID_READ               = (1 << 8),
492         IDE_DFLAG_NOPROBE               = (1 << 9),
493         /* need to do check_media_change() */
494         IDE_DFLAG_REMOVABLE             = (1 << 10),
495         /* needed for removable devices */
496         IDE_DFLAG_ATTACH                = (1 << 11),
497         IDE_DFLAG_FORCED_GEOM           = (1 << 12),
498         /* disallow setting unmask bit */
499         IDE_DFLAG_NO_UNMASK             = (1 << 13),
500         /* disallow enabling 32-bit I/O */
501         IDE_DFLAG_NO_IO_32BIT           = (1 << 14),
502         /* for removable only: door lock/unlock works */
503         IDE_DFLAG_DOORLOCKING           = (1 << 15),
504         /* disallow DMA */
505         IDE_DFLAG_NODMA                 = (1 << 16),
506         /* powermanagement told us not to do anything, so sleep nicely */
507         IDE_DFLAG_BLOCKED               = (1 << 17),
508         /* sleeping & sleep field valid */
509         IDE_DFLAG_SLEEPING              = (1 << 18),
510         IDE_DFLAG_POST_RESET            = (1 << 19),
511         IDE_DFLAG_UDMA33_WARNED         = (1 << 20),
512         IDE_DFLAG_LBA48                 = (1 << 21),
513         /* status of write cache */
514         IDE_DFLAG_WCACHE                = (1 << 22),
515         /* used for ignoring ATA_DF */
516         IDE_DFLAG_NOWERR                = (1 << 23),
517         /* retrying in PIO */
518         IDE_DFLAG_DMA_PIO_RETRY         = (1 << 24),
519         IDE_DFLAG_LBA                   = (1 << 25),
520         /* don't unload heads */
521         IDE_DFLAG_NO_UNLOAD             = (1 << 26),
522         /* heads unloaded, please don't reset port */
523         IDE_DFLAG_PARKED                = (1 << 27),
524         IDE_DFLAG_MEDIA_CHANGED         = (1 << 28),
525         /* write protect */
526         IDE_DFLAG_WP                    = (1 << 29),
527         IDE_DFLAG_FORMAT_IN_PROGRESS    = (1 << 30),
528         IDE_DFLAG_NIEN_QUIRK            = (1 << 31),
529 };
530 
531 struct ide_drive_s {
532         char            name[4];        /* drive name, such as "hda" */
533         char            driver_req[10]; /* requests specific driver */
534 
535         struct request_queue    *queue; /* request queue */
536 
537         struct request          *rq;    /* current request */
538         void            *driver_data;   /* extra driver data */
539         u16                     *id;    /* identification info */
540 #ifdef CONFIG_IDE_PROC_FS
541         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
542         const struct ide_proc_devset *settings; /* /proc/ide/ drive settings */
543 #endif
544         struct hwif_s           *hwif;  /* actually (ide_hwif_t *) */
545 
546         const struct ide_disk_ops *disk_ops;
547 
548         unsigned long dev_flags;
549 
550         unsigned long sleep;            /* sleep until this time */
551         unsigned long timeout;          /* max time to wait for irq */
552 
553         u8      special_flags;          /* special action flags */
554 
555         u8      select;                 /* basic drive/head select reg value */
556         u8      retry_pio;              /* retrying dma capable host in pio */
557         u8      waiting_for_dma;        /* dma currently in progress */
558         u8      dma;                    /* atapi dma flag */
559 
560         u8      init_speed;     /* transfer rate set at boot */
561         u8      current_speed;  /* current transfer rate set */
562         u8      desired_speed;  /* desired transfer rate set */
563         u8      pio_mode;       /* for ->set_pio_mode _only_ */
564         u8      dma_mode;       /* for ->set_dma_mode _only_ */
565         u8      dn;             /* now wide spread use */
566         u8      acoustic;       /* acoustic management */
567         u8      media;          /* disk, cdrom, tape, floppy, ... */
568         u8      ready_stat;     /* min status value for drive ready */
569         u8      mult_count;     /* current multiple sector setting */
570         u8      mult_req;       /* requested multiple sector setting */
571         u8      io_32bit;       /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
572         u8      bad_wstat;      /* used for ignoring ATA_DF */
573         u8      head;           /* "real" number of heads */
574         u8      sect;           /* "real" sectors per track */
575         u8      bios_head;      /* BIOS/fdisk/LILO number of heads */
576         u8      bios_sect;      /* BIOS/fdisk/LILO sectors per track */
577 
578         /* delay this long before sending packet command */
579         u8 pc_delay;
580 
581         unsigned int    bios_cyl;       /* BIOS/fdisk/LILO number of cyls */
582         unsigned int    cyl;            /* "real" number of cyls */
583         void            *drive_data;    /* used by set_pio_mode/dev_select() */
584         unsigned int    failures;       /* current failure count */
585         unsigned int    max_failures;   /* maximum allowed failure count */
586         u64             probed_capacity;/* initial/native media capacity */
587         u64             capacity64;     /* total number of sectors */
588 
589         int             lun;            /* logical unit */
590         int             crc_count;      /* crc counter to reduce drive speed */
591 
592         unsigned long   debug_mask;     /* debugging levels switch */
593 
594 #ifdef CONFIG_BLK_DEV_IDEACPI
595         struct ide_acpi_drive_link *acpidata;
596 #endif
597         struct list_head list;
598         struct device   gendev;
599         struct completion gendev_rel_comp;      /* to deal with device release() */
600 
601         /* current packet command */
602         struct ide_atapi_pc *pc;
603 
604         /* last failed packet command */
605         struct ide_atapi_pc *failed_pc;
606 
607         /* callback for packet commands */
608         int  (*pc_callback)(struct ide_drive_s *, int);
609 
610         ide_startstop_t (*irq_handler)(struct ide_drive_s *);
611 
612         unsigned long atapi_flags;
613 
614         struct ide_atapi_pc request_sense_pc;
615 
616         /* current sense rq and buffer */
617         bool sense_rq_armed;
618         struct request *sense_rq;
619         struct request_sense sense_data;
620 };
621 
622 typedef struct ide_drive_s ide_drive_t;
623 
624 #define to_ide_device(dev)              container_of(dev, ide_drive_t, gendev)
625 
626 #define to_ide_drv(obj, cont_type)      \
627         container_of(obj, struct cont_type, dev)
628 
629 #define ide_drv_g(disk, cont_type)      \
630         container_of((disk)->private_data, struct cont_type, driver)
631 
632 struct ide_port_info;
633 
634 struct ide_tp_ops {
635         void    (*exec_command)(struct hwif_s *, u8);
636         u8      (*read_status)(struct hwif_s *);
637         u8      (*read_altstatus)(struct hwif_s *);
638         void    (*write_devctl)(struct hwif_s *, u8);
639 
640         void    (*dev_select)(ide_drive_t *);
641         void    (*tf_load)(ide_drive_t *, struct ide_taskfile *, u8);
642         void    (*tf_read)(ide_drive_t *, struct ide_taskfile *, u8);
643 
644         void    (*input_data)(ide_drive_t *, struct ide_cmd *,
645                               void *, unsigned int);
646         void    (*output_data)(ide_drive_t *, struct ide_cmd *,
647                                void *, unsigned int);
648 };
649 
650 extern const struct ide_tp_ops default_tp_ops;
651 
652 /**
653  * struct ide_port_ops - IDE port operations
654  *
655  * @init_dev:           host specific initialization of a device
656  * @set_pio_mode:       routine to program host for PIO mode
657  * @set_dma_mode:       routine to program host for DMA mode
658  * @reset_poll:         chipset polling based on hba specifics
659  * @pre_reset:          chipset specific changes to default for device-hba resets
660  * @resetproc:          routine to reset controller after a disk reset
661  * @maskproc:           special host masking for drive selection
662  * @quirkproc:          check host's drive quirk list
663  * @clear_irq:          clear IRQ
664  *
665  * @mdma_filter:        filter MDMA modes
666  * @udma_filter:        filter UDMA modes
667  *
668  * @cable_detect:       detect cable type
669  */
670 struct ide_port_ops {
671         void    (*init_dev)(ide_drive_t *);
672         void    (*set_pio_mode)(struct hwif_s *, ide_drive_t *);
673         void    (*set_dma_mode)(struct hwif_s *, ide_drive_t *);
674         blk_status_t (*reset_poll)(ide_drive_t *);
675         void    (*pre_reset)(ide_drive_t *);
676         void    (*resetproc)(ide_drive_t *);
677         void    (*maskproc)(ide_drive_t *, int);
678         void    (*quirkproc)(ide_drive_t *);
679         void    (*clear_irq)(ide_drive_t *);
680         int     (*test_irq)(struct hwif_s *);
681 
682         u8      (*mdma_filter)(ide_drive_t *);
683         u8      (*udma_filter)(ide_drive_t *);
684 
685         u8      (*cable_detect)(struct hwif_s *);
686 };
687 
688 struct ide_dma_ops {
689         void    (*dma_host_set)(struct ide_drive_s *, int);
690         int     (*dma_setup)(struct ide_drive_s *, struct ide_cmd *);
691         void    (*dma_start)(struct ide_drive_s *);
692         int     (*dma_end)(struct ide_drive_s *);
693         int     (*dma_test_irq)(struct ide_drive_s *);
694         void    (*dma_lost_irq)(struct ide_drive_s *);
695         /* below ones are optional */
696         int     (*dma_check)(struct ide_drive_s *, struct ide_cmd *);
697         int     (*dma_timer_expiry)(struct ide_drive_s *);
698         void    (*dma_clear)(struct ide_drive_s *);
699         /*
700          * The following method is optional and only required to be
701          * implemented for the SFF-8038i compatible controllers.
702          */
703         u8      (*dma_sff_read_status)(struct hwif_s *);
704 };
705 
706 enum {
707         IDE_PFLAG_PROBING               = (1 << 0),
708 };
709 
710 struct ide_host;
711 
712 typedef struct hwif_s {
713         struct hwif_s *mate;            /* other hwif from same PCI chip */
714         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
715 
716         struct ide_host *host;
717 
718         char name[6];                   /* name of interface, eg. "ide0" */
719 
720         struct ide_io_ports     io_ports;
721 
722         unsigned long   sata_scr[SATA_NR_PORTS];
723 
724         ide_drive_t     *devices[MAX_DRIVES + 1];
725 
726         unsigned long   port_flags;
727 
728         u8 major;       /* our major number */
729         u8 index;       /* 0 for ide0; 1 for ide1; ... */
730         u8 channel;     /* for dual-port chips: 0=primary, 1=secondary */
731 
732         u32 host_flags;
733 
734         u8 pio_mask;
735 
736         u8 ultra_mask;
737         u8 mwdma_mask;
738         u8 swdma_mask;
739 
740         u8 cbl;         /* cable type */
741 
742         hwif_chipset_t chipset; /* sub-module for tuning.. */
743 
744         struct device *dev;
745 
746         void (*rw_disk)(ide_drive_t *, struct request *);
747 
748         const struct ide_tp_ops         *tp_ops;
749         const struct ide_port_ops       *port_ops;
750         const struct ide_dma_ops        *dma_ops;
751 
752         /* dma physical region descriptor table (cpu view) */
753         unsigned int    *dmatable_cpu;
754         /* dma physical region descriptor table (dma view) */
755         dma_addr_t      dmatable_dma;
756 
757         /* maximum number of PRD table entries */
758         int prd_max_nents;
759         /* PRD entry size in bytes */
760         int prd_ent_size;
761 
762         /* Scatter-gather list used to build the above */
763         struct scatterlist *sg_table;
764         int sg_max_nents;               /* Maximum number of entries in it */
765 
766         struct ide_cmd cmd;             /* current command */
767 
768         int             rqsize;         /* max sectors per request */
769         int             irq;            /* our irq number */
770 
771         unsigned long   dma_base;       /* base addr for dma ports */
772 
773         unsigned long   config_data;    /* for use by chipset-specific code */
774         unsigned long   select_data;    /* for use by chipset-specific code */
775 
776         unsigned long   extra_base;     /* extra addr for dma ports */
777         unsigned        extra_ports;    /* number of extra dma ports */
778 
779         unsigned        present    : 1; /* this interface exists */
780         unsigned        busy       : 1; /* serializes devices on a port */
781 
782         struct device           gendev;
783         struct device           *portdev;
784 
785         struct completion gendev_rel_comp; /* To deal with device release() */
786 
787         void            *hwif_data;     /* extra hwif data */
788 
789 #ifdef CONFIG_BLK_DEV_IDEACPI
790         struct ide_acpi_hwif_link *acpidata;
791 #endif
792 
793         /* IRQ handler, if active */
794         ide_startstop_t (*handler)(ide_drive_t *);
795 
796         /* BOOL: polling active & poll_timeout field valid */
797         unsigned int polling : 1;
798 
799         /* current drive */
800         ide_drive_t *cur_dev;
801 
802         /* current request */
803         struct request *rq;
804 
805         /* failsafe timer */
806         struct timer_list timer;
807         /* timeout value during long polls */
808         unsigned long poll_timeout;
809         /* queried upon timeouts */
810         int (*expiry)(ide_drive_t *);
811 
812         int req_gen;
813         int req_gen_timer;
814 
815         spinlock_t lock;
816 } ____cacheline_internodealigned_in_smp ide_hwif_t;
817 
818 #define MAX_HOST_PORTS 4
819 
820 struct ide_host {
821         ide_hwif_t      *ports[MAX_HOST_PORTS + 1];
822         unsigned int    n_ports;
823         struct device   *dev[2];
824 
825         int             (*init_chipset)(struct pci_dev *);
826 
827         void            (*get_lock)(irq_handler_t, void *);
828         void            (*release_lock)(void);
829 
830         irq_handler_t   irq_handler;
831 
832         unsigned long   host_flags;
833 
834         int             irq_flags;
835 
836         void            *host_priv;
837         ide_hwif_t      *cur_port;      /* for hosts requiring serialization */
838 
839         /* used for hosts requiring serialization */
840         volatile unsigned long  host_busy;
841 };
842 
843 #define IDE_HOST_BUSY 0
844 
845 /*
846  *  internal ide interrupt handler type
847  */
848 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
849 typedef int (ide_expiry_t)(ide_drive_t *);
850 
851 /* used by ide-cd, ide-floppy, etc. */
852 typedef void (xfer_func_t)(ide_drive_t *, struct ide_cmd *, void *, unsigned);
853 
854 extern struct mutex ide_setting_mtx;
855 
856 /*
857  * configurable drive settings
858  */
859 
860 #define DS_SYNC (1 << 0)
861 
862 struct ide_devset {
863         int             (*get)(ide_drive_t *);
864         int             (*set)(ide_drive_t *, int);
865         unsigned int    flags;
866 };
867 
868 #define __DEVSET(_flags, _get, _set) { \
869         .flags  = _flags, \
870         .get    = _get, \
871         .set    = _set, \
872 }
873 
874 #define ide_devset_get(name, field) \
875 static int get_##name(ide_drive_t *drive) \
876 { \
877         return drive->field; \
878 }
879 
880 #define ide_devset_set(name, field) \
881 static int set_##name(ide_drive_t *drive, int arg) \
882 { \
883         drive->field = arg; \
884         return 0; \
885 }
886 
887 #define ide_devset_get_flag(name, flag) \
888 static int get_##name(ide_drive_t *drive) \
889 { \
890         return !!(drive->dev_flags & flag); \
891 }
892 
893 #define ide_devset_set_flag(name, flag) \
894 static int set_##name(ide_drive_t *drive, int arg) \
895 { \
896         if (arg) \
897                 drive->dev_flags |= flag; \
898         else \
899                 drive->dev_flags &= ~flag; \
900         return 0; \
901 }
902 
903 #define __IDE_DEVSET(_name, _flags, _get, _set) \
904 const struct ide_devset ide_devset_##_name = \
905         __DEVSET(_flags, _get, _set)
906 
907 #define IDE_DEVSET(_name, _flags, _get, _set) \
908 static __IDE_DEVSET(_name, _flags, _get, _set)
909 
910 #define ide_devset_rw(_name, _func) \
911 IDE_DEVSET(_name, 0, get_##_func, set_##_func)
912 
913 #define ide_devset_w(_name, _func) \
914 IDE_DEVSET(_name, 0, NULL, set_##_func)
915 
916 #define ide_ext_devset_rw(_name, _func) \
917 __IDE_DEVSET(_name, 0, get_##_func, set_##_func)
918 
919 #define ide_ext_devset_rw_sync(_name, _func) \
920 __IDE_DEVSET(_name, DS_SYNC, get_##_func, set_##_func)
921 
922 #define ide_decl_devset(_name) \
923 extern const struct ide_devset ide_devset_##_name
924 
925 ide_decl_devset(io_32bit);
926 ide_decl_devset(keepsettings);
927 ide_decl_devset(pio_mode);
928 ide_decl_devset(unmaskirq);
929 ide_decl_devset(using_dma);
930 
931 #ifdef CONFIG_IDE_PROC_FS
932 /*
933  * /proc/ide interface
934  */
935 
936 #define ide_devset_rw_field(_name, _field) \
937 ide_devset_get(_name, _field); \
938 ide_devset_set(_name, _field); \
939 IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)
940 
941 #define ide_devset_rw_flag(_name, _field) \
942 ide_devset_get_flag(_name, _field); \
943 ide_devset_set_flag(_name, _field); \
944 IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)
945 
946 struct ide_proc_devset {
947         const char              *name;
948         const struct ide_devset *setting;
949         int                     min, max;
950         int                     (*mulf)(ide_drive_t *);
951         int                     (*divf)(ide_drive_t *);
952 };
953 
954 #define __IDE_PROC_DEVSET(_name, _min, _max, _mulf, _divf) { \
955         .name = __stringify(_name), \
956         .setting = &ide_devset_##_name, \
957         .min = _min, \
958         .max = _max, \
959         .mulf = _mulf, \
960         .divf = _divf, \
961 }
962 
963 #define IDE_PROC_DEVSET(_name, _min, _max) \
964 __IDE_PROC_DEVSET(_name, _min, _max, NULL, NULL)
965 
966 typedef struct {
967         const char      *name;
968         umode_t         mode;
969         const struct file_operations *proc_fops;
970 } ide_proc_entry_t;
971 
972 void proc_ide_create(void);
973 void proc_ide_destroy(void);
974 void ide_proc_register_port(ide_hwif_t *);
975 void ide_proc_port_register_devices(ide_hwif_t *);
976 void ide_proc_unregister_device(ide_drive_t *);
977 void ide_proc_unregister_port(ide_hwif_t *);
978 void ide_proc_register_driver(ide_drive_t *, struct ide_driver *);
979 void ide_proc_unregister_driver(ide_drive_t *, struct ide_driver *);
980 
981 extern const struct file_operations ide_capacity_proc_fops;
982 extern const struct file_operations ide_geometry_proc_fops;
983 #else
984 static inline void proc_ide_create(void) { ; }
985 static inline void proc_ide_destroy(void) { ; }
986 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
987 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
988 static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
989 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
990 static inline void ide_proc_register_driver(ide_drive_t *drive,
991                                             struct ide_driver *driver) { ; }
992 static inline void ide_proc_unregister_driver(ide_drive_t *drive,
993                                               struct ide_driver *driver) { ; }
994 #endif
995 
996 enum {
997         /* enter/exit functions */
998         IDE_DBG_FUNC =                  (1 << 0),
999         /* sense key/asc handling */
1000         IDE_DBG_SENSE =                 (1 << 1),
1001         /* packet commands handling */
1002         IDE_DBG_PC =                    (1 << 2),
1003         /* request handling */
1004         IDE_DBG_RQ =                    (1 << 3),
1005         /* driver probing/setup */
1006         IDE_DBG_PROBE =                 (1 << 4),
1007 };
1008 
1009 /* DRV_NAME has to be defined in the driver before using the macro below */
1010 #define __ide_debug_log(lvl, fmt, args...)                              \
1011 {                                                                       \
1012         if (unlikely(drive->debug_mask & lvl))                          \
1013                 printk(KERN_INFO DRV_NAME ": %s: " fmt "\n",            \
1014                                           __func__, ## args);           \
1015 }
1016 
1017 /*
1018  * Power Management state machine (rq->pm->pm_step).
1019  *
1020  * For each step, the core calls ide_start_power_step() first.
1021  * This can return:
1022  *      - ide_stopped : In this case, the core calls us back again unless
1023  *                      step have been set to ide_power_state_completed.
1024  *      - ide_started : In this case, the channel is left busy until an
1025  *                      async event (interrupt) occurs.
1026  * Typically, ide_start_power_step() will issue a taskfile request with
1027  * do_rw_taskfile().
1028  *
1029  * Upon reception of the interrupt, the core will call ide_complete_power_step()
1030  * with the error code if any. This routine should update the step value
1031  * and return. It should not start a new request. The core will call
1032  * ide_start_power_step() for the new step value, unless step have been
1033  * set to IDE_PM_COMPLETED.
1034  */
1035 enum {
1036         IDE_PM_START_SUSPEND,
1037         IDE_PM_FLUSH_CACHE      = IDE_PM_START_SUSPEND,
1038         IDE_PM_STANDBY,
1039 
1040         IDE_PM_START_RESUME,
1041         IDE_PM_RESTORE_PIO      = IDE_PM_START_RESUME,
1042         IDE_PM_IDLE,
1043         IDE_PM_RESTORE_DMA,
1044 
1045         IDE_PM_COMPLETED,
1046 };
1047 
1048 int generic_ide_suspend(struct device *, pm_message_t);
1049 int generic_ide_resume(struct device *);
1050 
1051 void ide_complete_power_step(ide_drive_t *, struct request *);
1052 ide_startstop_t ide_start_power_step(ide_drive_t *, struct request *);
1053 void ide_complete_pm_rq(ide_drive_t *, struct request *);
1054 void ide_check_pm_state(ide_drive_t *, struct request *);
1055 
1056 /*
1057  * Subdrivers support.
1058  *
1059  * The gendriver.owner field should be set to the module owner of this driver.
1060  * The gendriver.name field should be set to the name of this driver
1061  */
1062 struct ide_driver {
1063         const char                      *version;
1064         ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
1065         struct device_driver    gen_driver;
1066         int             (*probe)(ide_drive_t *);
1067         void            (*remove)(ide_drive_t *);
1068         void            (*resume)(ide_drive_t *);
1069         void            (*shutdown)(ide_drive_t *);
1070 #ifdef CONFIG_IDE_PROC_FS
1071         ide_proc_entry_t *              (*proc_entries)(ide_drive_t *);
1072         const struct ide_proc_devset *  (*proc_devsets)(ide_drive_t *);
1073 #endif
1074 };
1075 
1076 #define to_ide_driver(drv) container_of(drv, struct ide_driver, gen_driver)
1077 
1078 int ide_device_get(ide_drive_t *);
1079 void ide_device_put(ide_drive_t *);
1080 
1081 struct ide_ioctl_devset {
1082         unsigned int    get_ioctl;
1083         unsigned int    set_ioctl;
1084         const struct ide_devset *setting;
1085 };
1086 
1087 int ide_setting_ioctl(ide_drive_t *, struct block_device *, unsigned int,
1088                       unsigned long, const struct ide_ioctl_devset *);
1089 
1090 int generic_ide_ioctl(ide_drive_t *, struct block_device *, unsigned, unsigned long);
1091 
1092 extern int ide_vlb_clk;
1093 extern int ide_pci_clk;
1094 
1095 int ide_end_rq(ide_drive_t *, struct request *, blk_status_t, unsigned int);
1096 void ide_kill_rq(ide_drive_t *, struct request *);
1097 
1098 void __ide_set_handler(ide_drive_t *, ide_handler_t *, unsigned int);
1099 void ide_set_handler(ide_drive_t *, ide_handler_t *, unsigned int);
1100 
1101 void ide_execute_command(ide_drive_t *, struct ide_cmd *, ide_handler_t *,
1102                          unsigned int);
1103 
1104 void ide_pad_transfer(ide_drive_t *, int, int);
1105 
1106 ide_startstop_t ide_error(ide_drive_t *, const char *, u8);
1107 
1108 void ide_fix_driveid(u16 *);
1109 
1110 extern void ide_fixstring(u8 *, const int, const int);
1111 
1112 int ide_busy_sleep(ide_drive_t *, unsigned long, int);
1113 
1114 int __ide_wait_stat(ide_drive_t *, u8, u8, unsigned long, u8 *);
1115 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1116 
1117 ide_startstop_t ide_do_park_unpark(ide_drive_t *, struct request *);
1118 ide_startstop_t ide_do_devset(ide_drive_t *, struct request *);
1119 
1120 extern ide_startstop_t ide_do_reset (ide_drive_t *);
1121 
1122 extern int ide_devset_execute(ide_drive_t *drive,
1123                               const struct ide_devset *setting, int arg);
1124 
1125 void ide_complete_cmd(ide_drive_t *, struct ide_cmd *, u8, u8);
1126 int ide_complete_rq(ide_drive_t *, blk_status_t, unsigned int);
1127 
1128 void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd);
1129 void ide_tf_dump(const char *, struct ide_cmd *);
1130 
1131 void ide_exec_command(ide_hwif_t *, u8);
1132 u8 ide_read_status(ide_hwif_t *);
1133 u8 ide_read_altstatus(ide_hwif_t *);
1134 void ide_write_devctl(ide_hwif_t *, u8);
1135 
1136 void ide_dev_select(ide_drive_t *);
1137 void ide_tf_load(ide_drive_t *, struct ide_taskfile *, u8);
1138 void ide_tf_read(ide_drive_t *, struct ide_taskfile *, u8);
1139 
1140 void ide_input_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);
1141 void ide_output_data(ide_drive_t *, struct ide_cmd *, void *, unsigned int);
1142 
1143 void SELECT_MASK(ide_drive_t *, int);
1144 
1145 u8 ide_read_error(ide_drive_t *);
1146 void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
1147 
1148 int ide_check_ireason(ide_drive_t *, struct request *, int, int, int);
1149 
1150 int ide_check_atapi_device(ide_drive_t *, const char *);
1151 
1152 void ide_init_pc(struct ide_atapi_pc *);
1153 
1154 /* Disk head parking */
1155 extern wait_queue_head_t ide_park_wq;
1156 ssize_t ide_park_show(struct device *dev, struct device_attribute *attr,
1157                       char *buf);
1158 ssize_t ide_park_store(struct device *dev, struct device_attribute *attr,
1159                        const char *buf, size_t len);
1160 
1161 /*
1162  * Special requests for ide-tape block device strategy routine.
1163  *
1164  * In order to service a character device command, we add special requests to
1165  * the tail of our block device request queue and wait for their completion.
1166  */
1167 enum {
1168         REQ_IDETAPE_PC1         = (1 << 0), /* packet command (first stage) */
1169         REQ_IDETAPE_PC2         = (1 << 1), /* packet command (second stage) */
1170         REQ_IDETAPE_READ        = (1 << 2),
1171         REQ_IDETAPE_WRITE       = (1 << 3),
1172 };
1173 
1174 int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *,
1175                       void *, unsigned int);
1176 
1177 int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
1178 int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
1179 int ide_set_media_lock(ide_drive_t *, struct gendisk *, int);
1180 void ide_create_request_sense_cmd(ide_drive_t *, struct ide_atapi_pc *);
1181 void ide_retry_pc(ide_drive_t *drive);
1182 
1183 void ide_prep_sense(ide_drive_t *drive, struct request *rq);
1184 int ide_queue_sense_rq(ide_drive_t *drive, void *special);
1185 
1186 int ide_cd_expiry(ide_drive_t *);
1187 
1188 int ide_cd_get_xferlen(struct request *);
1189 
1190 ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_cmd *);
1191 
1192 ide_startstop_t do_rw_taskfile(ide_drive_t *, struct ide_cmd *);
1193 
1194 void ide_pio_bytes(ide_drive_t *, struct ide_cmd *, unsigned int, unsigned int);
1195 
1196 void ide_finish_cmd(ide_drive_t *, struct ide_cmd *, u8);
1197 
1198 int ide_raw_taskfile(ide_drive_t *, struct ide_cmd *, u8 *, u16);
1199 int ide_no_data_taskfile(ide_drive_t *, struct ide_cmd *);
1200 
1201 int ide_taskfile_ioctl(ide_drive_t *, unsigned long);
1202 
1203 int ide_dev_read_id(ide_drive_t *, u8, u16 *, int);
1204 
1205 extern int ide_driveid_update(ide_drive_t *);
1206 extern int ide_config_drive_speed(ide_drive_t *, u8);
1207 extern u8 eighty_ninty_three (ide_drive_t *);
1208 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1209 
1210 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1211 
1212 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1213 
1214 extern void ide_timer_expiry(unsigned long);
1215 extern irqreturn_t ide_intr(int irq, void *dev_id);
1216 extern void do_ide_request(struct request_queue *);
1217 extern void ide_requeue_and_plug(ide_drive_t *drive, struct request *rq);
1218 
1219 void ide_init_disk(struct gendisk *, ide_drive_t *);
1220 
1221 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1222 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1223 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1224 #else
1225 #define ide_pci_register_driver(d) pci_register_driver(d)
1226 #endif
1227 
1228 static inline int ide_pci_is_in_compatibility_mode(struct pci_dev *dev)
1229 {
1230         if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE && (dev->class & 5) != 5)
1231                 return 1;
1232         return 0;
1233 }
1234 
1235 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *,
1236                          struct ide_hw *, struct ide_hw **);
1237 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1238 
1239 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1240 int ide_pci_set_master(struct pci_dev *, const char *);
1241 unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
1242 int ide_pci_check_simplex(ide_hwif_t *, const struct ide_port_info *);
1243 int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
1244 #else
1245 static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
1246                                      const struct ide_port_info *d)
1247 {
1248         return -EINVAL;
1249 }
1250 #endif
1251 
1252 struct ide_pci_enablebit {
1253         u8      reg;    /* byte pci reg holding the enable-bit */
1254         u8      mask;   /* mask to isolate the enable-bit */
1255         u8      val;    /* value of masked reg when "enabled" */
1256 };
1257 
1258 enum {
1259         /* Uses ISA control ports not PCI ones. */
1260         IDE_HFLAG_ISA_PORTS             = (1 << 0),
1261         /* single port device */
1262         IDE_HFLAG_SINGLE                = (1 << 1),
1263         /* don't use legacy PIO blacklist */
1264         IDE_HFLAG_PIO_NO_BLACKLIST      = (1 << 2),
1265         /* set for the second port of QD65xx */
1266         IDE_HFLAG_QD_2ND_PORT           = (1 << 3),
1267         /* use PIO8/9 for prefetch off/on */
1268         IDE_HFLAG_ABUSE_PREFETCH        = (1 << 4),
1269         /* use PIO6/7 for fast-devsel off/on */
1270         IDE_HFLAG_ABUSE_FAST_DEVSEL     = (1 << 5),
1271         /* use 100-102 and 200-202 PIO values to set DMA modes */
1272         IDE_HFLAG_ABUSE_DMA_MODES       = (1 << 6),
1273         /*
1274          * keep DMA setting when programming PIO mode, may be used only
1275          * for hosts which have separate PIO and DMA timings (ie. PMAC)
1276          */
1277         IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1278         /* program host for the transfer mode after programming device */
1279         IDE_HFLAG_POST_SET_MODE         = (1 << 8),
1280         /* don't program host/device for the transfer mode ("smart" hosts) */
1281         IDE_HFLAG_NO_SET_MODE           = (1 << 9),
1282         /* trust BIOS for programming chipset/device for DMA */
1283         IDE_HFLAG_TRUST_BIOS_FOR_DMA    = (1 << 10),
1284         /* host is CS5510/CS5520 */
1285         IDE_HFLAG_CS5520                = (1 << 11),
1286         /* ATAPI DMA is unsupported */
1287         IDE_HFLAG_NO_ATAPI_DMA          = (1 << 12),
1288         /* set if host is a "non-bootable" controller */
1289         IDE_HFLAG_NON_BOOTABLE          = (1 << 13),
1290         /* host doesn't support DMA */
1291         IDE_HFLAG_NO_DMA                = (1 << 14),
1292         /* check if host is PCI IDE device before allowing DMA */
1293         IDE_HFLAG_NO_AUTODMA            = (1 << 15),
1294         /* host uses MMIO */
1295         IDE_HFLAG_MMIO                  = (1 << 16),
1296         /* no LBA48 */
1297         IDE_HFLAG_NO_LBA48              = (1 << 17),
1298         /* no LBA48 DMA */
1299         IDE_HFLAG_NO_LBA48_DMA          = (1 << 18),
1300         /* data FIFO is cleared by an error */
1301         IDE_HFLAG_ERROR_STOPS_FIFO      = (1 << 19),
1302         /* serialize ports */
1303         IDE_HFLAG_SERIALIZE             = (1 << 20),
1304         /* host is DTC2278 */
1305         IDE_HFLAG_DTC2278               = (1 << 21),
1306         /* 4 devices on a single set of I/O ports */
1307         IDE_HFLAG_4DRIVES               = (1 << 22),
1308         /* host is TRM290 */
1309         IDE_HFLAG_TRM290                = (1 << 23),
1310         /* use 32-bit I/O ops */
1311         IDE_HFLAG_IO_32BIT              = (1 << 24),
1312         /* unmask IRQs */
1313         IDE_HFLAG_UNMASK_IRQS           = (1 << 25),
1314         IDE_HFLAG_BROKEN_ALTSTATUS      = (1 << 26),
1315         /* serialize ports if DMA is possible (for sl82c105) */
1316         IDE_HFLAG_SERIALIZE_DMA         = (1 << 27),
1317         /* force host out of "simplex" mode */
1318         IDE_HFLAG_CLEAR_SIMPLEX         = (1 << 28),
1319         /* DSC overlap is unsupported */
1320         IDE_HFLAG_NO_DSC                = (1 << 29),
1321         /* never use 32-bit I/O ops */
1322         IDE_HFLAG_NO_IO_32BIT           = (1 << 30),
1323         /* never unmask IRQs */
1324         IDE_HFLAG_NO_UNMASK_IRQS        = (1 << 31),
1325 };
1326 
1327 #ifdef CONFIG_BLK_DEV_OFFBOARD
1328 # define IDE_HFLAG_OFF_BOARD    0
1329 #else
1330 # define IDE_HFLAG_OFF_BOARD    IDE_HFLAG_NON_BOOTABLE
1331 #endif
1332 
1333 struct ide_port_info {
1334         char                    *name;
1335 
1336         int                     (*init_chipset)(struct pci_dev *);
1337 
1338         void                    (*get_lock)(irq_handler_t, void *);
1339         void                    (*release_lock)(void);
1340 
1341         void                    (*init_iops)(ide_hwif_t *);
1342         void                    (*init_hwif)(ide_hwif_t *);
1343         int                     (*init_dma)(ide_hwif_t *,
1344                                             const struct ide_port_info *);
1345 
1346         const struct ide_tp_ops         *tp_ops;
1347         const struct ide_port_ops       *port_ops;
1348         const struct ide_dma_ops        *dma_ops;
1349 
1350         struct ide_pci_enablebit        enablebits[2];
1351 
1352         hwif_chipset_t          chipset;
1353 
1354         u16                     max_sectors;    /* if < than the default one */
1355 
1356         u32                     host_flags;
1357 
1358         int                     irq_flags;
1359 
1360         u8                      pio_mask;
1361         u8                      swdma_mask;
1362         u8                      mwdma_mask;
1363         u8                      udma_mask;
1364 };
1365 
1366 /*
1367  * State information carried for REQ_TYPE_ATA_PM_SUSPEND and REQ_TYPE_ATA_PM_RESUME
1368  * requests.
1369  */
1370 struct ide_pm_state {
1371         /* PM state machine step value, currently driver specific */
1372         int     pm_step;
1373         /* requested PM state value (S1, S2, S3, S4, ...) */
1374         u32     pm_state;
1375         void*   data;           /* for driver use */
1376 };
1377 
1378 
1379 int ide_pci_init_one(struct pci_dev *, const struct ide_port_info *, void *);
1380 int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
1381                      const struct ide_port_info *, void *);
1382 void ide_pci_remove(struct pci_dev *);
1383 
1384 #ifdef CONFIG_PM
1385 int ide_pci_suspend(struct pci_dev *, pm_message_t);
1386 int ide_pci_resume(struct pci_dev *);
1387 #else
1388 #define ide_pci_suspend NULL
1389 #define ide_pci_resume NULL
1390 #endif
1391 
1392 void ide_map_sg(ide_drive_t *, struct ide_cmd *);
1393 void ide_init_sg_cmd(struct ide_cmd *, unsigned int);
1394 
1395 #define BAD_DMA_DRIVE           0
1396 #define GOOD_DMA_DRIVE          1
1397 
1398 struct drive_list_entry {
1399         const char *id_model;
1400         const char *id_firmware;
1401 };
1402 
1403 int ide_in_drive_list(u16 *, const struct drive_list_entry *);
1404 
1405 #ifdef CONFIG_BLK_DEV_IDEDMA
1406 int ide_dma_good_drive(ide_drive_t *);
1407 int __ide_dma_bad_drive(ide_drive_t *);
1408 
1409 u8 ide_find_dma_mode(ide_drive_t *, u8);
1410 
1411 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1412 {
1413         return ide_find_dma_mode(drive, XFER_UDMA_6);
1414 }
1415 
1416 void ide_dma_off_quietly(ide_drive_t *);
1417 void ide_dma_off(ide_drive_t *);
1418 void ide_dma_on(ide_drive_t *);
1419 int ide_set_dma(ide_drive_t *);
1420 void ide_check_dma_crc(ide_drive_t *);
1421 ide_startstop_t ide_dma_intr(ide_drive_t *);
1422 
1423 int ide_allocate_dma_engine(ide_hwif_t *);
1424 void ide_release_dma_engine(ide_hwif_t *);
1425 
1426 int ide_dma_prepare(ide_drive_t *, struct ide_cmd *);
1427 void ide_dma_unmap_sg(ide_drive_t *, struct ide_cmd *);
1428 
1429 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1430 int config_drive_for_dma(ide_drive_t *);
1431 int ide_build_dmatable(ide_drive_t *, struct ide_cmd *);
1432 void ide_dma_host_set(ide_drive_t *, int);
1433 int ide_dma_setup(ide_drive_t *, struct ide_cmd *);
1434 extern void ide_dma_start(ide_drive_t *);
1435 int ide_dma_end(ide_drive_t *);
1436 int ide_dma_test_irq(ide_drive_t *);
1437 int ide_dma_sff_timer_expiry(ide_drive_t *);
1438 u8 ide_dma_sff_read_status(ide_hwif_t *);
1439 extern const struct ide_dma_ops sff_dma_ops;
1440 #else
1441 static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }
1442 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1443 
1444 void ide_dma_lost_irq(ide_drive_t *);
1445 ide_startstop_t ide_dma_timeout_retry(ide_drive_t *, int);
1446 
1447 #else
1448 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1449 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1450 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1451 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1452 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1453 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1454 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1455 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1456 static inline ide_startstop_t ide_dma_intr(ide_drive_t *drive) { return ide_stopped; }
1457 static inline ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error) { return ide_stopped; }
1458 static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
1459 static inline int ide_dma_prepare(ide_drive_t *drive,
1460                                   struct ide_cmd *cmd) { return 1; }
1461 static inline void ide_dma_unmap_sg(ide_drive_t *drive,
1462                                     struct ide_cmd *cmd) { ; }
1463 #endif /* CONFIG_BLK_DEV_IDEDMA */
1464 
1465 #ifdef CONFIG_BLK_DEV_IDEACPI
1466 int ide_acpi_init(void);
1467 bool ide_port_acpi(ide_hwif_t *hwif);
1468 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1469 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1470 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1471 void ide_acpi_init_port(ide_hwif_t *);
1472 void ide_acpi_port_init_devices(ide_hwif_t *);
1473 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1474 #else
1475 static inline int ide_acpi_init(void) { return 0; }
1476 static inline bool ide_port_acpi(ide_hwif_t *hwif) { return 0; }
1477 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1478 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1479 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1480 static inline void ide_acpi_init_port(ide_hwif_t *hwif) { ; }
1481 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1482 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1483 #endif
1484 
1485 void ide_register_region(struct gendisk *);
1486 void ide_unregister_region(struct gendisk *);
1487 
1488 void ide_check_nien_quirk_list(ide_drive_t *);
1489 void ide_undecoded_slave(ide_drive_t *);
1490 
1491 void ide_port_apply_params(ide_hwif_t *);
1492 int ide_sysfs_register_port(ide_hwif_t *);
1493 
1494 struct ide_host *ide_host_alloc(const struct ide_port_info *, struct ide_hw **,
1495                                 unsigned int);
1496 void ide_host_free(struct ide_host *);
1497 int ide_host_register(struct ide_host *, const struct ide_port_info *,
1498                       struct ide_hw **);
1499 int ide_host_add(const struct ide_port_info *, struct ide_hw **, unsigned int,
1500                  struct ide_host **);
1501 void ide_host_remove(struct ide_host *);
1502 int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
1503 void ide_port_unregister_devices(ide_hwif_t *);
1504 void ide_port_scan(ide_hwif_t *);
1505 
1506 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1507 {
1508         return hwif->hwif_data;
1509 }
1510 
1511 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1512 {
1513         hwif->hwif_data = data;
1514 }
1515 
1516 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1517 
1518 u64 ide_get_lba_addr(struct ide_cmd *, int);
1519 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1520 
1521 struct ide_timing {
1522         u8  mode;
1523         u8  setup;      /* t1 */
1524         u16 act8b;      /* t2 for 8-bit io */
1525         u16 rec8b;      /* t2i for 8-bit io */
1526         u16 cyc8b;      /* t0 for 8-bit io */
1527         u16 active;     /* t2 or tD */
1528         u16 recover;    /* t2i or tK */
1529         u16 cycle;      /* t0 */
1530         u16 udma;       /* t2CYCTYP/2 */
1531 };
1532 
1533 enum {
1534         IDE_TIMING_SETUP        = (1 << 0),
1535         IDE_TIMING_ACT8B        = (1 << 1),
1536         IDE_TIMING_REC8B        = (1 << 2),
1537         IDE_TIMING_CYC8B        = (1 << 3),
1538         IDE_TIMING_8BIT         = IDE_TIMING_ACT8B | IDE_TIMING_REC8B |
1539                                   IDE_TIMING_CYC8B,
1540         IDE_TIMING_ACTIVE       = (1 << 4),
1541         IDE_TIMING_RECOVER      = (1 << 5),
1542         IDE_TIMING_CYCLE        = (1 << 6),
1543         IDE_TIMING_UDMA         = (1 << 7),
1544         IDE_TIMING_ALL          = IDE_TIMING_SETUP | IDE_TIMING_8BIT |
1545                                   IDE_TIMING_ACTIVE | IDE_TIMING_RECOVER |
1546                                   IDE_TIMING_CYCLE | IDE_TIMING_UDMA,
1547 };
1548 
1549 struct ide_timing *ide_timing_find_mode(u8);
1550 u16 ide_pio_cycle_time(ide_drive_t *, u8);
1551 void ide_timing_merge(struct ide_timing *, struct ide_timing *,
1552                       struct ide_timing *, unsigned int);
1553 int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
1554 
1555 #ifdef CONFIG_IDE_XFER_MODE
1556 int ide_scan_pio_blacklist(char *);
1557 const char *ide_xfer_verbose(u8);
1558 int ide_pio_need_iordy(ide_drive_t *, const u8);
1559 int ide_set_pio_mode(ide_drive_t *, u8);
1560 int ide_set_dma_mode(ide_drive_t *, u8);
1561 void ide_set_pio(ide_drive_t *, u8);
1562 int ide_set_xfer_rate(ide_drive_t *, u8);
1563 #else
1564 static inline void ide_set_pio(ide_drive_t *drive, u8 pio) { ; }
1565 static inline int ide_set_xfer_rate(ide_drive_t *drive, u8 rate) { return -1; }
1566 #endif
1567 
1568 static inline void ide_set_max_pio(ide_drive_t *drive)
1569 {
1570         ide_set_pio(drive, 255);
1571 }
1572 
1573 char *ide_media_string(ide_drive_t *);
1574 
1575 extern const struct attribute_group *ide_dev_groups[];
1576 extern struct bus_type ide_bus_type;
1577 extern struct class *ide_port_class;
1578 
1579 static inline void ide_dump_identify(u8 *id)
1580 {
1581         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1582 }
1583 
1584 static inline int hwif_to_node(ide_hwif_t *hwif)
1585 {
1586         return hwif->dev ? dev_to_node(hwif->dev) : -1;
1587 }
1588 
1589 static inline ide_drive_t *ide_get_pair_dev(ide_drive_t *drive)
1590 {
1591         ide_drive_t *peer = drive->hwif->devices[(drive->dn ^ 1) & 1];
1592 
1593         return (peer->dev_flags & IDE_DFLAG_PRESENT) ? peer : NULL;
1594 }
1595 
1596 static inline void *ide_get_drivedata(ide_drive_t *drive)
1597 {
1598         return drive->drive_data;
1599 }
1600 
1601 static inline void ide_set_drivedata(ide_drive_t *drive, void *data)
1602 {
1603         drive->drive_data = data;
1604 }
1605 
1606 #define ide_port_for_each_dev(i, dev, port) \
1607         for ((i) = 0; ((dev) = (port)->devices[i]) || (i) < MAX_DRIVES; (i)++)
1608 
1609 #define ide_port_for_each_present_dev(i, dev, port) \
1610         for ((i) = 0; ((dev) = (port)->devices[i]) || (i) < MAX_DRIVES; (i)++) \
1611                 if ((dev)->dev_flags & IDE_DFLAG_PRESENT)
1612 
1613 #define ide_host_for_each_port(i, port, host) \
1614         for ((i) = 0; ((port) = (host)->ports[i]) || (i) < MAX_HOST_PORTS; (i)++)
1615 
1616 
1617 #endif /* _IDE_H */
1618 

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