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crypto: s390 - Respect STFL bit
[linux-2.6/btrfs-unstable.git] / include / linux / ide.h
blobeddb6daadf4abceaffec3f9a0b36603e2e97f4cb
1 #ifndef _IDE_H
2 #define _IDE_H
3 /*
4 * linux/include/linux/ide.h
5 *
6 * Copyright (C) 1994-2002 Linus Torvalds & authors
7 */
8
9 #include <linux/init.h>
10 #include <linux/ioport.h>
11 #include <linux/hdreg.h>
12 #include <linux/blkdev.h>
13 #include <linux/proc_fs.h>
14 #include <linux/interrupt.h>
15 #include <linux/bitops.h>
16 #include <linux/bio.h>
17 #include <linux/device.h>
18 #include <linux/pci.h>
19 #include <linux/completion.h>
20 #ifdef CONFIG_BLK_DEV_IDEACPI
21 #include <acpi/acpi.h>
22 #endif
23 #include <asm/byteorder.h>
24 #include <asm/system.h>
25 #include <asm/io.h>
26 #include <asm/mutex.h>
27
28 #if defined(CONFIG_CRIS) || defined(CONFIG_FRV)
29 # define SUPPORT_VLB_SYNC 0
30 #else
31 # define SUPPORT_VLB_SYNC 1
32 #endif
33
34 /*
35 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
36 * number.
37 */
38
39 #define IDE_NO_IRQ (-1)
40
41 typedef unsigned char byte; /* used everywhere */
42
43 /*
44 * Probably not wise to fiddle with these
45 */
46 #define ERROR_MAX 8 /* Max read/write errors per sector */
47 #define ERROR_RESET 3 /* Reset controller every 4th retry */
48 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
49
50 /*
51 * state flags
52 */
53
54 #define DMA_PIO_RETRY 1 /* retrying in PIO */
55
56 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
57 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
58
59 /*
60 * Definitions for accessing IDE controller registers
61 */
62 #define IDE_NR_PORTS (10)
63
64 struct ide_io_ports {
65 unsigned long data_addr;
66
67 union {
68 unsigned long error_addr; /* read: error */
69 unsigned long feature_addr; /* write: feature */
70 };
71
72 unsigned long nsect_addr;
73 unsigned long lbal_addr;
74 unsigned long lbam_addr;
75 unsigned long lbah_addr;
76
77 unsigned long device_addr;
78
79 union {
80 unsigned long status_addr; /*  read: status  */
81 unsigned long command_addr; /* write: command */
82 };
83
84 unsigned long ctl_addr;
85
86 unsigned long irq_addr;
87 };
88
89 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
90 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
91 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
92 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
93 #define DRIVE_READY (READY_STAT | SEEK_STAT)
94
95 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
96
97 #define SATA_NR_PORTS (3) /* 16 possible ?? */
98
99 #define SATA_STATUS_OFFSET (0)
100 #define SATA_ERROR_OFFSET (1)
101 #define SATA_CONTROL_OFFSET (2)
102
103 /*
104 * Our Physical Region Descriptor (PRD) table should be large enough
105 * to handle the biggest I/O request we are likely to see. Since requests
106 * can have no more than 256 sectors, and since the typical blocksize is
107 * two or more sectors, we could get by with a limit of 128 entries here for
108 * the usual worst case. Most requests seem to include some contiguous blocks,
109 * further reducing the number of table entries required.
110 *
111 * The driver reverts to PIO mode for individual requests that exceed
112 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
113 * 100% of all crazy scenarios here is not necessary.
114 *
115 * As it turns out though, we must allocate a full 4KB page for this,
116 * so the two PRD tables (ide0 & ide1) will each get half of that,
117 * allowing each to have about 256 entries (8 bytes each) from this.
118 */
119 #define PRD_BYTES 8
120 #define PRD_ENTRIES 256
121
122 /*
123 * Some more useful definitions
124 */
125 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
126 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
127 #define SECTOR_SIZE 512
128 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
129 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
130
131 /*
132 * Timeouts for various operations:
133 */
134 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
135 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
136 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
137 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
138 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
139 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
140
141 /*
142 * Check for an interrupt and acknowledge the interrupt status
143 */
144 struct hwif_s;
145 typedef int (ide_ack_intr_t)(struct hwif_s *);
146
147 /*
148 * hwif_chipset_t is used to keep track of the specific hardware
149 * chipset used by each IDE interface, if known.
150 */
151 enum { ide_unknown, ide_generic, ide_pci,
152 ide_cmd640, ide_dtc2278, ide_ali14xx,
153 ide_qd65xx, ide_umc8672, ide_ht6560b,
154 ide_rz1000, ide_trm290,
155 ide_cmd646, ide_cy82c693, ide_4drives,
156 ide_pmac, ide_acorn,
157 ide_au1xxx, ide_palm3710
158 };
159
160 typedef u8 hwif_chipset_t;
161
162 /*
163 * Structure to hold all information about the location of this port
164 */
165 typedef struct hw_regs_s {
166 union {
167 struct ide_io_ports io_ports;
168 unsigned long io_ports_array[IDE_NR_PORTS];
169 };
170
171 int irq; /* our irq number */
172 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
173 hwif_chipset_t chipset;
174 struct device *dev;
175 } hw_regs_t;
176
177 void ide_init_port_data(struct hwif_s *, unsigned int);
178 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
179
180 static inline void ide_std_init_ports(hw_regs_t *hw,
181 unsigned long io_addr,
182 unsigned long ctl_addr)
183 {
184 unsigned int i;
185
186 for (i = 0; i <= 7; i++)
187 hw->io_ports_array[i] = io_addr++;
188
189 hw->io_ports.ctl_addr = ctl_addr;
190 }
191
192 /* for IDE PCI controllers in legacy mode, temporary */
193 static inline int __ide_default_irq(unsigned long base)
194 {
195 switch (base) {
196 #ifdef CONFIG_IA64
197 case 0x1f0: return isa_irq_to_vector(14);
198 case 0x170: return isa_irq_to_vector(15);
199 #else
200 case 0x1f0: return 14;
201 case 0x170: return 15;
202 #endif
203 }
204 return 0;
205 }
206
207 #include <asm/ide.h>
208
209 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
210 #undef MAX_HWIFS
211 #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
212 #endif
213
214 /* Currently only m68k, apus and m8xx need it */
215 #ifndef IDE_ARCH_ACK_INTR
216 # define ide_ack_intr(hwif) (1)
217 #endif
218
219 /* Currently only Atari needs it */
220 #ifndef IDE_ARCH_LOCK
221 # define ide_release_lock() do {} while (0)
222 # define ide_get_lock(hdlr, data) do {} while (0)
223 #endif /* IDE_ARCH_LOCK */
224
225 /*
226 * Now for the data we need to maintain per-drive: ide_drive_t
227 */
228
229 #define ide_scsi 0x21
230 #define ide_disk 0x20
231 #define ide_optical 0x7
232 #define ide_cdrom 0x5
233 #define ide_tape 0x1
234 #define ide_floppy 0x0
235
236 /*
237 * Special Driver Flags
238 *
239 * set_geometry : respecify drive geometry
240 * recalibrate : seek to cyl 0
241 * set_multmode : set multmode count
242 * set_tune : tune interface for drive
243 * serviced : service command
244 * reserved : unused
245 */
246 typedef union {
247 unsigned all : 8;
248 struct {
249 unsigned set_geometry : 1;
250 unsigned recalibrate : 1;
251 unsigned set_multmode : 1;
252 unsigned set_tune : 1;
253 unsigned serviced : 1;
254 unsigned reserved : 3;
255 } b;
256 } special_t;
257
258 /*
259 * ATA-IDE Select Register, aka Device-Head
260 *
261 * head : always zeros here
262 * unit : drive select number: 0/1
263 * bit5 : always 1
264 * lba : using LBA instead of CHS
265 * bit7 : always 1
266 */
267 typedef union {
268 unsigned all : 8;
269 struct {
270 #if defined(__LITTLE_ENDIAN_BITFIELD)
271 unsigned head : 4;
272 unsigned unit : 1;
273 unsigned bit5 : 1;
274 unsigned lba : 1;
275 unsigned bit7 : 1;
276 #elif defined(__BIG_ENDIAN_BITFIELD)
277 unsigned bit7 : 1;
278 unsigned lba : 1;
279 unsigned bit5 : 1;
280 unsigned unit : 1;
281 unsigned head : 4;
282 #else
283 #error "Please fix <asm/byteorder.h>"
284 #endif
285 } b;
286 } select_t, ata_select_t;
287
288 /*
289 * Status returned from various ide_ functions
290 */
291 typedef enum {
292 ide_stopped, /* no drive operation was started */
293 ide_started, /* a drive operation was started, handler was set */
294 } ide_startstop_t;
295
296 struct ide_driver_s;
297 struct ide_settings_s;
298
299 #ifdef CONFIG_BLK_DEV_IDEACPI
300 struct ide_acpi_drive_link;
301 struct ide_acpi_hwif_link;
302 #endif
303
304 typedef struct ide_drive_s {
305 char name[4]; /* drive name, such as "hda" */
306 char driver_req[10]; /* requests specific driver */
307
308 struct request_queue *queue; /* request queue */
309
310 struct request *rq; /* current request */
311 struct ide_drive_s *next; /* circular list of hwgroup drives */
312 void *driver_data; /* extra driver data */
313 struct hd_driveid *id; /* drive model identification info */
314 #ifdef CONFIG_IDE_PROC_FS
315 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
316 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
317 #endif
318 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
319
320 unsigned long sleep; /* sleep until this time */
321 unsigned long service_start; /* time we started last request */
322 unsigned long service_time; /* service time of last request */
323 unsigned long timeout; /* max time to wait for irq */
324
325 special_t special; /* special action flags */
326 select_t select; /* basic drive/head select reg value */
327
328 u8 keep_settings; /* restore settings after drive reset */
329 u8 using_dma; /* disk is using dma for read/write */
330 u8 retry_pio; /* retrying dma capable host in pio */
331 u8 state; /* retry state */
332 u8 waiting_for_dma; /* dma currently in progress */
333 u8 unmask; /* okay to unmask other irqs */
334 u8 noflush; /* don't attempt flushes */
335 u8 dsc_overlap; /* DSC overlap */
336 u8 nice1; /* give potential excess bandwidth */
337
338 unsigned present : 1; /* drive is physically present */
339 unsigned dead : 1; /* device ejected hint */
340 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
341 unsigned noprobe : 1; /* from: hdx=noprobe */
342 unsigned removable : 1; /* 1 if need to do check_media_change */
343 unsigned attach : 1; /* needed for removable devices */
344 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
345 unsigned no_unmask : 1; /* disallow setting unmask bit */
346 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
347 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
348 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
349 unsigned nodma : 1; /* disallow DMA */
350 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
351 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
352 unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
353 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
354 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
355 unsigned post_reset : 1;
356 unsigned udma33_warned : 1;
357
358 u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
359 u8 quirk_list; /* considered quirky, set for a specific host */
360 u8 init_speed; /* transfer rate set at boot */
361 u8 current_speed; /* current transfer rate set */
362 u8 desired_speed; /* desired transfer rate set */
363 u8 dn; /* now wide spread use */
364 u8 wcache; /* status of write cache */
365 u8 acoustic; /* acoustic management */
366 u8 media; /* disk, cdrom, tape, floppy, ... */
367 u8 ctl; /* "normal" value for Control register */
368 u8 ready_stat; /* min status value for drive ready */
369 u8 mult_count; /* current multiple sector setting */
370 u8 mult_req; /* requested multiple sector setting */
371 u8 tune_req; /* requested drive tuning setting */
372 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
373 u8 bad_wstat; /* used for ignoring WRERR_STAT */
374 u8 nowerr; /* used for ignoring WRERR_STAT */
375 u8 sect0; /* offset of first sector for DM6:DDO */
376 u8 head; /* "real" number of heads */
377 u8 sect; /* "real" sectors per track */
378 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
379 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
380
381 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
382 unsigned int cyl; /* "real" number of cyls */
383 unsigned int drive_data; /* used by set_pio_mode/selectproc */
384 unsigned int failures; /* current failure count */
385 unsigned int max_failures; /* maximum allowed failure count */
386 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
387
388 u64 capacity64; /* total number of sectors */
389
390 int lun; /* logical unit */
391 int crc_count; /* crc counter to reduce drive speed */
392 #ifdef CONFIG_BLK_DEV_IDEACPI
393 struct ide_acpi_drive_link *acpidata;
394 #endif
395 struct list_head list;
396 struct device gendev;
397 struct completion gendev_rel_comp; /* to deal with device release() */
398 } ide_drive_t;
399
400 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
401
402 #define IDE_CHIPSET_PCI_MASK \
403 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
404 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
405
406 struct ide_port_info;
407
408 struct ide_port_ops {
409 /* host specific initialization of devices on a port */
410 void (*port_init_devs)(struct hwif_s *);
411 /* routine to program host for PIO mode */
412 void (*set_pio_mode)(ide_drive_t *, const u8);
413 /* routine to program host for DMA mode */
414 void (*set_dma_mode)(ide_drive_t *, const u8);
415 /* tweaks hardware to select drive */
416 void (*selectproc)(ide_drive_t *);
417 /* chipset polling based on hba specifics */
418 int (*reset_poll)(ide_drive_t *);
419 /* chipset specific changes to default for device-hba resets */
420 void (*pre_reset)(ide_drive_t *);
421 /* routine to reset controller after a disk reset */
422 void (*resetproc)(ide_drive_t *);
423 /* special host masking for drive selection */
424 void (*maskproc)(ide_drive_t *, int);
425 /* check host's drive quirk list */
426 void (*quirkproc)(ide_drive_t *);
427
428 u8 (*mdma_filter)(ide_drive_t *);
429 u8 (*udma_filter)(ide_drive_t *);
430
431 u8 (*cable_detect)(struct hwif_s *);
432 };
433
434 struct ide_dma_ops {
435 void (*dma_host_set)(struct ide_drive_s *, int);
436 int (*dma_setup)(struct ide_drive_s *);
437 void (*dma_exec_cmd)(struct ide_drive_s *, u8);
438 void (*dma_start)(struct ide_drive_s *);
439 int (*dma_end)(struct ide_drive_s *);
440 int (*dma_test_irq)(struct ide_drive_s *);
441 void (*dma_lost_irq)(struct ide_drive_s *);
442 void (*dma_timeout)(struct ide_drive_s *);
443 };
444
445 struct ide_task_s;
446
447 typedef struct hwif_s {
448 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
449 struct hwif_s *mate; /* other hwif from same PCI chip */
450 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
451 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
452
453 char name[6]; /* name of interface, eg. "ide0" */
454
455 struct ide_io_ports io_ports;
456
457 unsigned long sata_scr[SATA_NR_PORTS];
458
459 ide_drive_t drives[MAX_DRIVES]; /* drive info */
460
461 u8 major; /* our major number */
462 u8 index; /* 0 for ide0; 1 for ide1; ... */
463 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
464 u8 bus_state; /* power state of the IDE bus */
465
466 u32 host_flags;
467
468 u8 pio_mask;
469
470 u8 ultra_mask;
471 u8 mwdma_mask;
472 u8 swdma_mask;
473
474 u8 cbl; /* cable type */
475
476 hwif_chipset_t chipset; /* sub-module for tuning.. */
477
478 struct device *dev;
479
480 ide_ack_intr_t *ack_intr;
481
482 void (*rw_disk)(ide_drive_t *, struct request *);
483
484 const struct ide_port_ops *port_ops;
485 const struct ide_dma_ops *dma_ops;
486
487 void (*tf_load)(ide_drive_t *, struct ide_task_s *);
488 void (*tf_read)(ide_drive_t *, struct ide_task_s *);
489
490 void (*input_data)(ide_drive_t *, struct request *, void *, unsigned);
491 void (*output_data)(ide_drive_t *, struct request *, void *, unsigned);
492
493 void (*ide_dma_clear_irq)(ide_drive_t *drive);
494
495 void (*OUTB)(u8 addr, unsigned long port);
496 void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
497
498 u8 (*INB)(unsigned long port);
499
500 /* dma physical region descriptor table (cpu view) */
501 unsigned int *dmatable_cpu;
502 /* dma physical region descriptor table (dma view) */
503 dma_addr_t dmatable_dma;
504 /* Scatter-gather list used to build the above */
505 struct scatterlist *sg_table;
506 int sg_max_nents; /* Maximum number of entries in it */
507 int sg_nents; /* Current number of entries in it */
508 int sg_dma_direction; /* dma transfer direction */
509
510 /* data phase of the active command (currently only valid for PIO/DMA) */
511 int data_phase;
512
513 unsigned int nsect;
514 unsigned int nleft;
515 struct scatterlist *cursg;
516 unsigned int cursg_ofs;
517
518 int rqsize; /* max sectors per request */
519 int irq; /* our irq number */
520
521 unsigned long dma_base; /* base addr for dma ports */
522 unsigned long dma_command; /* dma command register */
523 unsigned long dma_status; /* dma status register */
524
525 unsigned long config_data; /* for use by chipset-specific code */
526 unsigned long select_data; /* for use by chipset-specific code */
527
528 unsigned long extra_base; /* extra addr for dma ports */
529 unsigned extra_ports; /* number of extra dma ports */
530
531 unsigned present : 1; /* this interface exists */
532 unsigned serialized : 1; /* serialized all channel operation */
533 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
534 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
535 unsigned mmio : 1; /* host uses MMIO */
536
537 struct device gendev;
538 struct device *portdev;
539
540 struct completion gendev_rel_comp; /* To deal with device release() */
541
542 void *hwif_data; /* extra hwif data */
543
544 unsigned dma;
545
546 #ifdef CONFIG_BLK_DEV_IDEACPI
547 struct ide_acpi_hwif_link *acpidata;
548 #endif
549 } ____cacheline_internodealigned_in_smp ide_hwif_t;
550
551 /*
552 * internal ide interrupt handler type
553 */
554 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
555 typedef int (ide_expiry_t)(ide_drive_t *);
556
557 /* used by ide-cd, ide-floppy, etc. */
558 typedef void (xfer_func_t)(ide_drive_t *, struct request *rq, void *, unsigned);
559
560 typedef struct hwgroup_s {
561 /* irq handler, if active */
562 ide_startstop_t (*handler)(ide_drive_t *);
563
564 /* BOOL: protects all fields below */
565 volatile int busy;
566 /* BOOL: wake us up on timer expiry */
567 unsigned int sleeping : 1;
568 /* BOOL: polling active & poll_timeout field valid */
569 unsigned int polling : 1;
570 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
571 unsigned int resetting : 1;
572
573 /* current drive */
574 ide_drive_t *drive;
575 /* ptr to current hwif in linked-list */
576 ide_hwif_t *hwif;
577
578 /* current request */
579 struct request *rq;
580
581 /* failsafe timer */
582 struct timer_list timer;
583 /* timeout value during long polls */
584 unsigned long poll_timeout;
585 /* queried upon timeouts */
586 int (*expiry)(ide_drive_t *);
587
588 int req_gen;
589 int req_gen_timer;
590 } ide_hwgroup_t;
591
592 typedef struct ide_driver_s ide_driver_t;
593
594 extern struct mutex ide_setting_mtx;
595
596 int set_io_32bit(ide_drive_t *, int);
597 int set_pio_mode(ide_drive_t *, int);
598 int set_using_dma(ide_drive_t *, int);
599
600 /* ATAPI packet command flags */
601 enum {
602 /* set when an error is considered normal - no retry (ide-tape) */
603 PC_FLAG_ABORT = (1 << 0),
604 PC_FLAG_SUPPRESS_ERROR = (1 << 1),
605 PC_FLAG_WAIT_FOR_DSC = (1 << 2),
606 PC_FLAG_DMA_OK = (1 << 3),
607 PC_FLAG_DMA_RECOMMENDED = (1 << 4),
608 PC_FLAG_DMA_IN_PROGRESS = (1 << 5),
609 PC_FLAG_DMA_ERROR = (1 << 6),
610 PC_FLAG_WRITING = (1 << 7),
611 /* command timed out */
612 PC_FLAG_TIMEDOUT = (1 << 8),
613 };
614
615 struct ide_atapi_pc {
616 /* actual packet bytes */
617 u8 c[12];
618 /* incremented on each retry */
619 int retries;
620 int error;
621
622 /* bytes to transfer */
623 int req_xfer;
624 /* bytes actually transferred */
625 int xferred;
626
627 /* data buffer */
628 u8 *buf;
629 /* current buffer position */
630 u8 *cur_pos;
631 int buf_size;
632 /* missing/available data on the current buffer */
633 int b_count;
634
635 /* the corresponding request */
636 struct request *rq;
637
638 unsigned long flags;
639
640 /*
641 * those are more or less driver-specific and some of them are subject
642 * to change/removal later.
643 */
644 u8 pc_buf[256];
645 void (*idefloppy_callback) (ide_drive_t *);
646 ide_startstop_t (*idetape_callback) (ide_drive_t *);
647
648 /* idetape only */
649 struct idetape_bh *bh;
650 char *b_data;
651
652 /* idescsi only for now */
653 struct scatterlist *sg;
654 unsigned int sg_cnt;
655
656 struct scsi_cmnd *scsi_cmd;
657 void (*done) (struct scsi_cmnd *);
658
659 unsigned long timeout;
660 };
661
662 #ifdef CONFIG_IDE_PROC_FS
663 /*
664 * configurable drive settings
665 */
666
667 #define TYPE_INT 0
668 #define TYPE_BYTE 1
669 #define TYPE_SHORT 2
670
671 #define SETTING_READ (1 << 0)
672 #define SETTING_WRITE (1 << 1)
673 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
674
675 typedef int (ide_procset_t)(ide_drive_t *, int);
676 typedef struct ide_settings_s {
677 char *name;
678 int rw;
679 int data_type;
680 int min;
681 int max;
682 int mul_factor;
683 int div_factor;
684 void *data;
685 ide_procset_t *set;
686 int auto_remove;
687 struct ide_settings_s *next;
688 } ide_settings_t;
689
690 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
691
692 /*
693 * /proc/ide interface
694 */
695 typedef struct {
696 const char *name;
697 mode_t mode;
698 read_proc_t *read_proc;
699 write_proc_t *write_proc;
700 } ide_proc_entry_t;
701
702 void proc_ide_create(void);
703 void proc_ide_destroy(void);
704 void ide_proc_register_port(ide_hwif_t *);
705 void ide_proc_port_register_devices(ide_hwif_t *);
706 void ide_proc_unregister_device(ide_drive_t *);
707 void ide_proc_unregister_port(ide_hwif_t *);
708 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
709 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
710
711 void ide_add_generic_settings(ide_drive_t *);
712
713 read_proc_t proc_ide_read_capacity;
714 read_proc_t proc_ide_read_geometry;
715
716 /*
717 * Standard exit stuff:
718 */
719 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
720 { \
721 len -= off; \
722 if (len < count) { \
723 *eof = 1; \
724 if (len <= 0) \
725 return 0; \
726 } else \
727 len = count; \
728 *start = page + off; \
729 return len; \
730 }
731 #else
732 static inline void proc_ide_create(void) { ; }
733 static inline void proc_ide_destroy(void) { ; }
734 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
735 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
736 static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
737 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
738 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
739 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
740 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
741 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
742 #endif
743
744 /*
745 * Power Management step value (rq->pm->pm_step).
746 *
747 * The step value starts at 0 (ide_pm_state_start_suspend) for a
748 * suspend operation or 1000 (ide_pm_state_start_resume) for a
749 * resume operation.
750 *
751 * For each step, the core calls the subdriver start_power_step() first.
752 * This can return:
753 * - ide_stopped : In this case, the core calls us back again unless
754 * step have been set to ide_power_state_completed.
755 * - ide_started : In this case, the channel is left busy until an
756 * async event (interrupt) occurs.
757 * Typically, start_power_step() will issue a taskfile request with
758 * do_rw_taskfile().
759 *
760 * Upon reception of the interrupt, the core will call complete_power_step()
761 * with the error code if any. This routine should update the step value
762 * and return. It should not start a new request. The core will call
763 * start_power_step for the new step value, unless step have been set to
764 * ide_power_state_completed.
765 *
766 * Subdrivers are expected to define their own additional power
767 * steps from 1..999 for suspend and from 1001..1999 for resume,
768 * other values are reserved for future use.
769 */
770
771 enum {
772 ide_pm_state_completed = -1,
773 ide_pm_state_start_suspend = 0,
774 ide_pm_state_start_resume = 1000,
775 };
776
777 /*
778 * Subdrivers support.
779 *
780 * The gendriver.owner field should be set to the module owner of this driver.
781 * The gendriver.name field should be set to the name of this driver
782 */
783 struct ide_driver_s {
784 const char *version;
785 u8 media;
786 unsigned supports_dsc_overlap : 1;
787 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
788 int (*end_request)(ide_drive_t *, int, int);
789 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
790 ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
791 struct device_driver gen_driver;
792 int (*probe)(ide_drive_t *);
793 void (*remove)(ide_drive_t *);
794 void (*resume)(ide_drive_t *);
795 void (*shutdown)(ide_drive_t *);
796 #ifdef CONFIG_IDE_PROC_FS
797 ide_proc_entry_t *proc;
798 #endif
799 };
800
801 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
802
803 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
804
805 /*
806 * ide_hwifs[] is the master data structure used to keep track
807 * of just about everything in ide.c. Whenever possible, routines
808 * should be using pointers to a drive (ide_drive_t *) or
809 * pointers to a hwif (ide_hwif_t *), rather than indexing this
810 * structure directly (the allocation/layout may change!).
811 *
812 */
813 #ifndef _IDE_C
814 extern ide_hwif_t ide_hwifs[]; /* master data repository */
815 #endif
816 extern int ide_noacpi;
817 extern int ide_acpigtf;
818 extern int ide_acpionboot;
819 extern int noautodma;
820
821 extern int ide_vlb_clk;
822 extern int ide_pci_clk;
823
824 ide_hwif_t *ide_find_port_slot(const struct ide_port_info *);
825
826 static inline ide_hwif_t *ide_find_port(void)
827 {
828 return ide_find_port_slot(NULL);
829 }
830
831 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
832 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
833 int uptodate, int nr_sectors);
834
835 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
836
837 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
838 ide_expiry_t *);
839
840 void ide_execute_pkt_cmd(ide_drive_t *);
841
842 void ide_pad_transfer(ide_drive_t *, int, int);
843
844 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
845
846 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
847
848 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
849
850 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
851
852 extern void ide_fix_driveid(struct hd_driveid *);
853
854 extern void ide_fixstring(u8 *, const int, const int);
855
856 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
857
858 extern ide_startstop_t ide_do_reset (ide_drive_t *);
859
860 extern void ide_init_drive_cmd (struct request *rq);
861
862 /*
863 * "action" parameter type for ide_do_drive_cmd() below.
864 */
865 typedef enum {
866 ide_wait, /* insert rq at end of list, and wait for it */
867 ide_preempt, /* insert rq in front of current request */
868 ide_head_wait, /* insert rq in front of current request and wait for it */
869 ide_end /* insert rq at end of list, but don't wait for it */
870 } ide_action_t;
871
872 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
873
874 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
875
876 enum {
877 IDE_TFLAG_LBA48 = (1 << 0),
878 IDE_TFLAG_NO_SELECT_MASK = (1 << 1),
879 IDE_TFLAG_FLAGGED = (1 << 2),
880 IDE_TFLAG_OUT_DATA = (1 << 3),
881 IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
882 IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
883 IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
884 IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
885 IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
886 IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
887 IDE_TFLAG_OUT_HOB_NSECT |
888 IDE_TFLAG_OUT_HOB_LBAL |
889 IDE_TFLAG_OUT_HOB_LBAM |
890 IDE_TFLAG_OUT_HOB_LBAH,
891 IDE_TFLAG_OUT_FEATURE = (1 << 9),
892 IDE_TFLAG_OUT_NSECT = (1 << 10),
893 IDE_TFLAG_OUT_LBAL = (1 << 11),
894 IDE_TFLAG_OUT_LBAM = (1 << 12),
895 IDE_TFLAG_OUT_LBAH = (1 << 13),
896 IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
897 IDE_TFLAG_OUT_NSECT |
898 IDE_TFLAG_OUT_LBAL |
899 IDE_TFLAG_OUT_LBAM |
900 IDE_TFLAG_OUT_LBAH,
901 IDE_TFLAG_OUT_DEVICE = (1 << 14),
902 IDE_TFLAG_WRITE = (1 << 15),
903 IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16),
904 IDE_TFLAG_IN_DATA = (1 << 17),
905 IDE_TFLAG_CUSTOM_HANDLER = (1 << 18),
906 IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19),
907 IDE_TFLAG_IN_HOB_FEATURE = (1 << 20),
908 IDE_TFLAG_IN_HOB_NSECT = (1 << 21),
909 IDE_TFLAG_IN_HOB_LBAL = (1 << 22),
910 IDE_TFLAG_IN_HOB_LBAM = (1 << 23),
911 IDE_TFLAG_IN_HOB_LBAH = (1 << 24),
912 IDE_TFLAG_IN_HOB_LBA = IDE_TFLAG_IN_HOB_LBAL |
913 IDE_TFLAG_IN_HOB_LBAM |
914 IDE_TFLAG_IN_HOB_LBAH,
915 IDE_TFLAG_IN_HOB = IDE_TFLAG_IN_HOB_FEATURE |
916 IDE_TFLAG_IN_HOB_NSECT |
917 IDE_TFLAG_IN_HOB_LBA,
918 IDE_TFLAG_IN_NSECT = (1 << 25),
919 IDE_TFLAG_IN_LBAL = (1 << 26),
920 IDE_TFLAG_IN_LBAM = (1 << 27),
921 IDE_TFLAG_IN_LBAH = (1 << 28),
922 IDE_TFLAG_IN_LBA = IDE_TFLAG_IN_LBAL |
923 IDE_TFLAG_IN_LBAM |
924 IDE_TFLAG_IN_LBAH,
925 IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT |
926 IDE_TFLAG_IN_LBA,
927 IDE_TFLAG_IN_DEVICE = (1 << 29),
928 IDE_TFLAG_HOB = IDE_TFLAG_OUT_HOB |
929 IDE_TFLAG_IN_HOB,
930 IDE_TFLAG_TF = IDE_TFLAG_OUT_TF |
931 IDE_TFLAG_IN_TF,
932 IDE_TFLAG_DEVICE = IDE_TFLAG_OUT_DEVICE |
933 IDE_TFLAG_IN_DEVICE,
934 /* force 16-bit I/O operations */
935 IDE_TFLAG_IO_16BIT = (1 << 30),
936 /* ide_task_t was allocated using kmalloc() */
937 IDE_TFLAG_DYN = (1 << 31),
938 };
939
940 struct ide_taskfile {
941 u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
942
943 u8 hob_feature; /* 1-5: additional data to support LBA48 */
944 u8 hob_nsect;
945 u8 hob_lbal;
946 u8 hob_lbam;
947 u8 hob_lbah;
948
949 u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
950
951 union { /*  7: */
952 u8 error; /* read: error */
953 u8 feature; /* write: feature */
954 };
955
956 u8 nsect; /* 8: number of sectors */
957 u8 lbal; /* 9: LBA low */
958 u8 lbam; /* 10: LBA mid */
959 u8 lbah; /* 11: LBA high */
960
961 u8 device; /* 12: device select */
962
963 union { /* 13: */
964 u8 status; /*  read: status  */
965 u8 command; /* write: command */
966 };
967 };
968
969 typedef struct ide_task_s {
970 union {
971 struct ide_taskfile tf;
972 u8 tf_array[14];
973 };
974 u32 tf_flags;
975 int data_phase;
976 struct request *rq; /* copy of request */
977 void *special; /* valid_t generally */
978 } ide_task_t;
979
980 void ide_tf_dump(const char *, struct ide_taskfile *);
981
982 extern void SELECT_DRIVE(ide_drive_t *);
983
984 extern int drive_is_ready(ide_drive_t *);
985
986 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
987
988 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
989
990 void task_end_request(ide_drive_t *, struct request *, u8);
991
992 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
993 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
994
995 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
996 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
997 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
998
999 extern int system_bus_clock(void);
1000
1001 extern int ide_driveid_update(ide_drive_t *);
1002 extern int ide_config_drive_speed(ide_drive_t *, u8);
1003 extern u8 eighty_ninty_three (ide_drive_t *);
1004 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1005
1006 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1007
1008 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1009
1010 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1011 extern void ide_timer_expiry(unsigned long);
1012 extern irqreturn_t ide_intr(int irq, void *dev_id);
1013 extern void do_ide_request(struct request_queue *);
1014
1015 void ide_init_disk(struct gendisk *, ide_drive_t *);
1016
1017 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1018 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1019 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1020 #else
1021 #define ide_pci_register_driver(d) pci_register_driver(d)
1022 #endif
1023
1024 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
1025 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1026
1027 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1028 int ide_pci_set_master(struct pci_dev *, const char *);
1029 unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
1030 int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
1031 #else
1032 static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
1033 const struct ide_port_info *d)
1034 {
1035 return -EINVAL;
1036 }
1037 #endif
1038
1039 extern void default_hwif_iops(ide_hwif_t *);
1040 extern void default_hwif_mmiops(ide_hwif_t *);
1041 extern void default_hwif_transport(ide_hwif_t *);
1042
1043 typedef struct ide_pci_enablebit_s {
1044 u8 reg; /* byte pci reg holding the enable-bit */
1045 u8 mask; /* mask to isolate the enable-bit */
1046 u8 val; /* value of masked reg when "enabled" */
1047 } ide_pci_enablebit_t;
1048
1049 enum {
1050 /* Uses ISA control ports not PCI ones. */
1051 IDE_HFLAG_ISA_PORTS = (1 << 0),
1052 /* single port device */
1053 IDE_HFLAG_SINGLE = (1 << 1),
1054 /* don't use legacy PIO blacklist */
1055 IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
1056 /* set for the second port of QD65xx */
1057 IDE_HFLAG_QD_2ND_PORT = (1 << 3),
1058 /* use PIO8/9 for prefetch off/on */
1059 IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
1060 /* use PIO6/7 for fast-devsel off/on */
1061 IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
1062 /* use 100-102 and 200-202 PIO values to set DMA modes */
1063 IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
1064 /*
1065 * keep DMA setting when programming PIO mode, may be used only
1066 * for hosts which have separate PIO and DMA timings (ie. PMAC)
1067 */
1068 IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1069 /* program host for the transfer mode after programming device */
1070 IDE_HFLAG_POST_SET_MODE = (1 << 8),
1071 /* don't program host/device for the transfer mode ("smart" hosts) */
1072 IDE_HFLAG_NO_SET_MODE = (1 << 9),
1073 /* trust BIOS for programming chipset/device for DMA */
1074 IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
1075 /* host is CS5510/CS5520 */
1076 IDE_HFLAG_CS5520 = (1 << 11),
1077 /* ATAPI DMA is unsupported */
1078 IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
1079 /* set if host is a "non-bootable" controller */
1080 IDE_HFLAG_NON_BOOTABLE = (1 << 13),
1081 /* host doesn't support DMA */
1082 IDE_HFLAG_NO_DMA = (1 << 14),
1083 /* check if host is PCI IDE device before allowing DMA */
1084 IDE_HFLAG_NO_AUTODMA = (1 << 15),
1085 /* host uses MMIO */
1086 IDE_HFLAG_MMIO = (1 << 16),
1087 /* no LBA48 */
1088 IDE_HFLAG_NO_LBA48 = (1 << 17),
1089 /* no LBA48 DMA */
1090 IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
1091 /* data FIFO is cleared by an error */
1092 IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
1093 /* serialize ports */
1094 IDE_HFLAG_SERIALIZE = (1 << 20),
1095 /* use legacy IRQs */
1096 IDE_HFLAG_LEGACY_IRQS = (1 << 21),
1097 /* force use of legacy IRQs */
1098 IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
1099 /* limit LBA48 requests to 256 sectors */
1100 IDE_HFLAG_RQSIZE_256 = (1 << 23),
1101 /* use 32-bit I/O ops */
1102 IDE_HFLAG_IO_32BIT = (1 << 24),
1103 /* unmask IRQs */
1104 IDE_HFLAG_UNMASK_IRQS = (1 << 25),
1105 IDE_HFLAG_ABUSE_SET_DMA_MODE = (1 << 26),
1106 /* serialize ports if DMA is possible (for sl82c105) */
1107 IDE_HFLAG_SERIALIZE_DMA = (1 << 27),
1108 /* force host out of "simplex" mode */
1109 IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
1110 /* DSC overlap is unsupported */
1111 IDE_HFLAG_NO_DSC = (1 << 29),
1112 /* never use 32-bit I/O ops */
1113 IDE_HFLAG_NO_IO_32BIT = (1 << 30),
1114 /* never unmask IRQs */
1115 IDE_HFLAG_NO_UNMASK_IRQS = (1 << 31),
1116 /* host uses VDMA (disabled for now) */
1117 IDE_HFLAG_VDMA = 0,
1118 };
1119
1120 #ifdef CONFIG_BLK_DEV_OFFBOARD
1121 # define IDE_HFLAG_OFF_BOARD 0
1122 #else
1123 # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_NON_BOOTABLE
1124 #endif
1125
1126 struct ide_port_info {
1127 char *name;
1128 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1129 void (*init_iops)(ide_hwif_t *);
1130 void (*init_hwif)(ide_hwif_t *);
1131 int (*init_dma)(ide_hwif_t *,
1132 const struct ide_port_info *);
1133
1134 const struct ide_port_ops *port_ops;
1135 const struct ide_dma_ops *dma_ops;
1136
1137 ide_pci_enablebit_t enablebits[2];
1138 hwif_chipset_t chipset;
1139 u32 host_flags;
1140 u8 pio_mask;
1141 u8 swdma_mask;
1142 u8 mwdma_mask;
1143 u8 udma_mask;
1144 };
1145
1146 int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1147 int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1148
1149 void ide_map_sg(ide_drive_t *, struct request *);
1150 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1151
1152 #define BAD_DMA_DRIVE 0
1153 #define GOOD_DMA_DRIVE 1
1154
1155 struct drive_list_entry {
1156 const char *id_model;
1157 const char *id_firmware;
1158 };
1159
1160 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1161
1162 #ifdef CONFIG_BLK_DEV_IDEDMA
1163 int __ide_dma_bad_drive(ide_drive_t *);
1164 int ide_id_dma_bug(ide_drive_t *);
1165
1166 u8 ide_find_dma_mode(ide_drive_t *, u8);
1167
1168 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1169 {
1170 return ide_find_dma_mode(drive, XFER_UDMA_6);
1171 }
1172
1173 void ide_dma_off_quietly(ide_drive_t *);
1174 void ide_dma_off(ide_drive_t *);
1175 void ide_dma_on(ide_drive_t *);
1176 int ide_set_dma(ide_drive_t *);
1177 void ide_check_dma_crc(ide_drive_t *);
1178 ide_startstop_t ide_dma_intr(ide_drive_t *);
1179
1180 int ide_build_sglist(ide_drive_t *, struct request *);
1181 void ide_destroy_dmatable(ide_drive_t *);
1182
1183 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1184 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1185 int ide_allocate_dma_engine(ide_hwif_t *);
1186 void ide_release_dma_engine(ide_hwif_t *);
1187 void ide_setup_dma(ide_hwif_t *, unsigned long);
1188
1189 void ide_dma_host_set(ide_drive_t *, int);
1190 extern int ide_dma_setup(ide_drive_t *);
1191 void ide_dma_exec_cmd(ide_drive_t *, u8);
1192 extern void ide_dma_start(ide_drive_t *);
1193 extern int __ide_dma_end(ide_drive_t *);
1194 int ide_dma_test_irq(ide_drive_t *);
1195 extern void ide_dma_lost_irq(ide_drive_t *);
1196 extern void ide_dma_timeout(ide_drive_t *);
1197 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1198
1199 #else
1200 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1201 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1202 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1203 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1204 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1205 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1206 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1207 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1208 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1209 #endif /* CONFIG_BLK_DEV_IDEDMA */
1210
1211 #ifndef CONFIG_BLK_DEV_IDEDMA_SFF
1212 static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
1213 #endif
1214
1215 #ifdef CONFIG_BLK_DEV_IDEACPI
1216 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1217 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1218 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1219 extern void ide_acpi_init(ide_hwif_t *hwif);
1220 void ide_acpi_port_init_devices(ide_hwif_t *);
1221 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1222 #else
1223 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1224 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1225 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1226 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1227 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1228 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1229 #endif
1230
1231 void ide_remove_port_from_hwgroup(ide_hwif_t *);
1232 void ide_unregister(ide_hwif_t *);
1233
1234 void ide_register_region(struct gendisk *);
1235 void ide_unregister_region(struct gendisk *);
1236
1237 void ide_undecoded_slave(ide_drive_t *);
1238
1239 void ide_port_apply_params(ide_hwif_t *);
1240
1241 int ide_device_add_all(u8 *idx, const struct ide_port_info *);
1242 int ide_device_add(u8 idx[4], const struct ide_port_info *);
1243 int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
1244 void ide_port_unregister_devices(ide_hwif_t *);
1245 void ide_port_scan(ide_hwif_t *);
1246
1247 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1248 {
1249 return hwif->hwif_data;
1250 }
1251
1252 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1253 {
1254 hwif->hwif_data = data;
1255 }
1256
1257 const char *ide_xfer_verbose(u8 mode);
1258 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1259 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1260
1261 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1262 {
1263 return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1264 }
1265
1266 static inline int ide_dev_is_sata(struct hd_driveid *id)
1267 {
1268 /*
1269 * See if word 93 is 0 AND drive is at least ATA-5 compatible
1270 * verifying that word 80 by casting it to a signed type --
1271 * this trick allows us to filter out the reserved values of
1272 * 0x0000 and 0xffff along with the earlier ATA revisions...
1273 */
1274 if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1275 return 1;
1276 return 0;
1277 }
1278
1279 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1280 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1281
1282 typedef struct ide_pio_timings_s {
1283 int setup_time; /* Address setup (ns) minimum */
1284 int active_time; /* Active pulse (ns) minimum */
1285 int cycle_time; /* Cycle time (ns) minimum = */
1286 /* active + recovery (+ setup for some chips) */
1287 } ide_pio_timings_t;
1288
1289 unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
1290 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1291 extern const ide_pio_timings_t ide_pio_timings[6];
1292
1293 int ide_set_pio_mode(ide_drive_t *, u8);
1294 int ide_set_dma_mode(ide_drive_t *, u8);
1295
1296 void ide_set_pio(ide_drive_t *, u8);
1297
1298 static inline void ide_set_max_pio(ide_drive_t *drive)
1299 {
1300 ide_set_pio(drive, 255);
1301 }
1302
1303 extern spinlock_t ide_lock;
1304 extern struct mutex ide_cfg_mtx;
1305 /*
1306 * Structure locking:
1307 *
1308 * ide_cfg_mtx and ide_lock together protect changes to
1309 * ide_hwif_t->{next,hwgroup}
1310 * ide_drive_t->next
1311 *
1312 * ide_hwgroup_t->busy: ide_lock
1313 * ide_hwgroup_t->hwif: ide_lock
1314 * ide_hwif_t->mate: constant, no locking
1315 * ide_drive_t->hwif: constant, no locking
1316 */
1317
1318 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1319
1320 extern struct bus_type ide_bus_type;
1321 extern struct class *ide_port_class;
1322
1323 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1324 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1325
1326 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1327 #define ide_id_has_flush_cache_ext(id) \
1328 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1329
1330 static inline void ide_dump_identify(u8 *id)
1331 {
1332 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1333 }
1334
1335 static inline int hwif_to_node(ide_hwif_t *hwif)
1336 {
1337 struct pci_dev *dev = to_pci_dev(hwif->dev);
1338 return hwif->dev ? pcibus_to_node(dev->bus) : -1;
1339 }
1340
1341 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1342 {
1343 ide_hwif_t *hwif = HWIF(drive);
1344
1345 return &hwif->drives[(drive->dn ^ 1) & 1];
1346 }
1347
1348 static inline void ide_set_irq(ide_drive_t *drive, int on)
1349 {
1350 ide_hwif_t *hwif = drive->hwif;
1351
1352 hwif->OUTB(drive->ctl | (on ? 0 : 2), hwif->io_ports.ctl_addr);
1353 }
1354
1355 static inline u8 ide_read_status(ide_drive_t *drive)
1356 {
1357 ide_hwif_t *hwif = drive->hwif;
1358
1359 return hwif->INB(hwif->io_ports.status_addr);
1360 }
1361
1362 static inline u8 ide_read_altstatus(ide_drive_t *drive)
1363 {
1364 ide_hwif_t *hwif = drive->hwif;
1365
1366 return hwif->INB(hwif->io_ports.ctl_addr);
1367 }
1368
1369 static inline u8 ide_read_error(ide_drive_t *drive)
1370 {
1371 ide_hwif_t *hwif = drive->hwif;
1372
1373 return hwif->INB(hwif->io_ports.error_addr);
1374 }
1375 #endif /* _IDE_H */
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