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

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