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

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