4 * linux/include/linux/ide.h
6 * Copyright (C) 1994-2002 Linus Torvalds & authors
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>
23 #include <asm/byteorder.h>
24 #include <asm/system.h>
26 #include <asm/semaphore.h>
27 #include <asm/mutex.h>
29 #if defined(CONFIG_CRIS) || defined(CONFIG_FRV)
30 # define SUPPORT_VLB_SYNC 0
32 # define SUPPORT_VLB_SYNC 1
36 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
40 #define IDE_NO_IRQ (-1)
42 typedef unsigned char byte; /* used everywhere */
45 * Probably not wise to fiddle with these
47 #define ERROR_MAX 8 /* Max read/write errors per sector */
48 #define ERROR_RESET 3 /* Reset controller every 4th retry */
49 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
54 #define IDE_TUNE_NOAUTO 2
55 #define IDE_TUNE_AUTO 1
56 #define IDE_TUNE_DEFAULT 0
62 #define DMA_PIO_RETRY 1 /* retrying in PIO */
64 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
65 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
68 * Definitions for accessing IDE controller registers
70 #define IDE_NR_PORTS (10)
72 #define IDE_DATA_OFFSET (0)
73 #define IDE_ERROR_OFFSET (1)
74 #define IDE_NSECTOR_OFFSET (2)
75 #define IDE_SECTOR_OFFSET (3)
76 #define IDE_LCYL_OFFSET (4)
77 #define IDE_HCYL_OFFSET (5)
78 #define IDE_SELECT_OFFSET (6)
79 #define IDE_STATUS_OFFSET (7)
80 #define IDE_CONTROL_OFFSET (8)
81 #define IDE_IRQ_OFFSET (9)
83 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
84 #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
85 #define IDE_ALTSTATUS_OFFSET IDE_CONTROL_OFFSET
86 #define IDE_IREASON_OFFSET IDE_NSECTOR_OFFSET
87 #define IDE_BCOUNTL_OFFSET IDE_LCYL_OFFSET
88 #define IDE_BCOUNTH_OFFSET IDE_HCYL_OFFSET
90 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
91 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
92 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
93 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
94 #define DRIVE_READY (READY_STAT | SEEK_STAT)
96 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
98 #define SATA_NR_PORTS (3) /* 16 possible ?? */
100 #define SATA_STATUS_OFFSET (0)
101 #define SATA_ERROR_OFFSET (1)
102 #define SATA_CONTROL_OFFSET (2)
105 * Our Physical Region Descriptor (PRD) table should be large enough
106 * to handle the biggest I/O request we are likely to see. Since requests
107 * can have no more than 256 sectors, and since the typical blocksize is
108 * two or more sectors, we could get by with a limit of 128 entries here for
109 * the usual worst case. Most requests seem to include some contiguous blocks,
110 * further reducing the number of table entries required.
112 * The driver reverts to PIO mode for individual requests that exceed
113 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
114 * 100% of all crazy scenarios here is not necessary.
116 * As it turns out though, we must allocate a full 4KB page for this,
117 * so the two PRD tables (ide0 & ide1) will each get half of that,
118 * allowing each to have about 256 entries (8 bytes each) from this.
121 #define PRD_ENTRIES 256
124 * Some more useful definitions
126 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
127 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
128 #define SECTOR_SIZE 512
129 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
130 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
133 * Timeouts for various operations:
135 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
136 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
137 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
138 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
139 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
140 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
143 * Check for an interrupt and acknowledge the interrupt status
146 typedef int (ide_ack_intr_t)(struct hwif_s *);
149 * hwif_chipset_t is used to keep track of the specific hardware
150 * chipset used by each IDE interface, if known.
152 enum { ide_unknown, ide_generic, ide_pci,
153 ide_cmd640, ide_dtc2278, ide_ali14xx,
154 ide_qd65xx, ide_umc8672, ide_ht6560b,
155 ide_rz1000, ide_trm290,
156 ide_cmd646, ide_cy82c693, ide_4drives,
157 ide_pmac, ide_etrax100, ide_acorn,
158 ide_au1xxx, ide_palm3710
161 typedef u8 hwif_chipset_t;
164 * Structure to hold all information about the location of this port
166 typedef struct hw_regs_s {
167 unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
168 int irq; /* our irq number */
169 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
170 hwif_chipset_t chipset;
174 struct hwif_s * ide_find_port(unsigned long);
175 void ide_init_port_data(struct hwif_s *, unsigned int);
176 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
178 static inline void ide_std_init_ports(hw_regs_t *hw,
179 unsigned long io_addr,
180 unsigned long ctl_addr)
184 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
185 hw->io_ports[i] = io_addr++;
187 hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
192 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
194 #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
197 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
198 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
199 # define ide_default_io_base(index) (0)
200 # define ide_default_irq(base) (0)
201 # define ide_init_default_irq(base) (0)
204 /* Currently only m68k, apus and m8xx need it */
205 #ifndef IDE_ARCH_ACK_INTR
206 # define ide_ack_intr(hwif) (1)
209 /* Currently only Atari needs it */
210 #ifndef IDE_ARCH_LOCK
211 # define ide_release_lock() do {} while (0)
212 # define ide_get_lock(hdlr, data) do {} while (0)
213 #endif /* IDE_ARCH_LOCK */
216 * Now for the data we need to maintain per-drive: ide_drive_t
219 #define ide_scsi 0x21
220 #define ide_disk 0x20
221 #define ide_optical 0x7
222 #define ide_cdrom 0x5
224 #define ide_floppy 0x0
227 * Special Driver Flags
229 * set_geometry : respecify drive geometry
230 * recalibrate : seek to cyl 0
231 * set_multmode : set multmode count
232 * set_tune : tune interface for drive
233 * serviced : service command
239 unsigned set_geometry : 1;
240 unsigned recalibrate : 1;
241 unsigned set_multmode : 1;
242 unsigned set_tune : 1;
243 unsigned serviced : 1;
244 unsigned reserved : 3;
249 * ATA-IDE Select Register, aka Device-Head
251 * head : always zeros here
252 * unit : drive select number: 0/1
254 * lba : using LBA instead of CHS
260 #if defined(__LITTLE_ENDIAN_BITFIELD)
266 #elif defined(__BIG_ENDIAN_BITFIELD)
273 #error "Please fix <asm/byteorder.h>"
276 } select_t, ata_select_t;
279 * Status returned from various ide_ functions
282 ide_stopped, /* no drive operation was started */
283 ide_started, /* a drive operation was started, handler was set */
287 struct ide_settings_s;
289 #ifdef CONFIG_BLK_DEV_IDEACPI
290 struct ide_acpi_drive_link;
291 struct ide_acpi_hwif_link;
294 typedef struct ide_drive_s {
295 char name[4]; /* drive name, such as "hda" */
296 char driver_req[10]; /* requests specific driver */
298 struct request_queue *queue; /* request queue */
300 struct request *rq; /* current request */
301 struct ide_drive_s *next; /* circular list of hwgroup drives */
302 void *driver_data; /* extra driver data */
303 struct hd_driveid *id; /* drive model identification info */
304 #ifdef CONFIG_IDE_PROC_FS
305 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
306 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
308 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
310 unsigned long sleep; /* sleep until this time */
311 unsigned long service_start; /* time we started last request */
312 unsigned long service_time; /* service time of last request */
313 unsigned long timeout; /* max time to wait for irq */
315 special_t special; /* special action flags */
316 select_t select; /* basic drive/head select reg value */
318 u8 keep_settings; /* restore settings after drive reset */
319 u8 using_dma; /* disk is using dma for read/write */
320 u8 retry_pio; /* retrying dma capable host in pio */
321 u8 state; /* retry state */
322 u8 waiting_for_dma; /* dma currently in progress */
323 u8 unmask; /* okay to unmask other irqs */
324 u8 noflush; /* don't attempt flushes */
325 u8 dsc_overlap; /* DSC overlap */
326 u8 nice1; /* give potential excess bandwidth */
328 unsigned present : 1; /* drive is physically present */
329 unsigned dead : 1; /* device ejected hint */
330 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
331 unsigned noprobe : 1; /* from: hdx=noprobe */
332 unsigned removable : 1; /* 1 if need to do check_media_change */
333 unsigned attach : 1; /* needed for removable devices */
334 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
335 unsigned no_unmask : 1; /* disallow setting unmask bit */
336 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
337 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
338 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
339 unsigned nodma : 1; /* disallow DMA */
340 unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
341 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
342 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
343 unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
344 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
345 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
346 unsigned post_reset : 1;
347 unsigned udma33_warned : 1;
349 u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
350 u8 quirk_list; /* considered quirky, set for a specific host */
351 u8 init_speed; /* transfer rate set at boot */
352 u8 current_speed; /* current transfer rate set */
353 u8 desired_speed; /* desired transfer rate set */
354 u8 dn; /* now wide spread use */
355 u8 wcache; /* status of write cache */
356 u8 acoustic; /* acoustic management */
357 u8 media; /* disk, cdrom, tape, floppy, ... */
358 u8 ctl; /* "normal" value for Control register */
359 u8 ready_stat; /* min status value for drive ready */
360 u8 mult_count; /* current multiple sector setting */
361 u8 mult_req; /* requested multiple sector setting */
362 u8 tune_req; /* requested drive tuning setting */
363 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
364 u8 bad_wstat; /* used for ignoring WRERR_STAT */
365 u8 nowerr; /* used for ignoring WRERR_STAT */
366 u8 sect0; /* offset of first sector for DM6:DDO */
367 u8 head; /* "real" number of heads */
368 u8 sect; /* "real" sectors per track */
369 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
370 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
372 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
373 unsigned int cyl; /* "real" number of cyls */
374 unsigned int drive_data; /* used by set_pio_mode/selectproc */
375 unsigned int failures; /* current failure count */
376 unsigned int max_failures; /* maximum allowed failure count */
377 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
379 u64 capacity64; /* total number of sectors */
381 int lun; /* logical unit */
382 int crc_count; /* crc counter to reduce drive speed */
383 #ifdef CONFIG_BLK_DEV_IDEACPI
384 struct ide_acpi_drive_link *acpidata;
386 struct list_head list;
387 struct device gendev;
388 struct completion gendev_rel_comp; /* to deal with device release() */
391 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
393 #define IDE_CHIPSET_PCI_MASK \
394 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
395 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
397 struct ide_port_info;
399 typedef struct hwif_s {
400 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
401 struct hwif_s *mate; /* other hwif from same PCI chip */
402 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
403 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
405 char name[6]; /* name of interface, eg. "ide0" */
407 /* task file registers for pata and sata */
408 unsigned long io_ports[IDE_NR_PORTS];
409 unsigned long sata_scr[SATA_NR_PORTS];
411 ide_drive_t drives[MAX_DRIVES]; /* drive info */
413 u8 major; /* our major number */
414 u8 index; /* 0 for ide0; 1 for ide1; ... */
415 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
416 u8 bus_state; /* power state of the IDE bus */
426 u8 cbl; /* cable type */
428 hwif_chipset_t chipset; /* sub-module for tuning.. */
432 const struct ide_port_info *cds; /* chipset device struct */
434 ide_ack_intr_t *ack_intr;
436 void (*rw_disk)(ide_drive_t *, struct request *);
439 ide_hwif_ops_t *hwifops;
441 /* host specific initialization of devices on a port */
442 void (*port_init_devs)(struct hwif_s *);
443 /* routine to program host for PIO mode */
444 void (*set_pio_mode)(ide_drive_t *, const u8);
445 /* routine to program host for DMA mode */
446 void (*set_dma_mode)(ide_drive_t *, const u8);
447 /* tweaks hardware to select drive */
448 void (*selectproc)(ide_drive_t *);
449 /* chipset polling based on hba specifics */
450 int (*reset_poll)(ide_drive_t *);
451 /* chipset specific changes to default for device-hba resets */
452 void (*pre_reset)(ide_drive_t *);
453 /* routine to reset controller after a disk reset */
454 void (*resetproc)(ide_drive_t *);
455 /* special host masking for drive selection */
456 void (*maskproc)(ide_drive_t *, int);
457 /* check host's drive quirk list */
458 void (*quirkproc)(ide_drive_t *);
460 u8 (*mdma_filter)(ide_drive_t *);
461 u8 (*udma_filter)(ide_drive_t *);
463 u8 (*cable_detect)(struct hwif_s *);
465 void (*ata_input_data)(ide_drive_t *, void *, u32);
466 void (*ata_output_data)(ide_drive_t *, void *, u32);
468 void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
469 void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
471 void (*dma_host_set)(ide_drive_t *, int);
472 int (*dma_setup)(ide_drive_t *);
473 void (*dma_exec_cmd)(ide_drive_t *, u8);
474 void (*dma_start)(ide_drive_t *);
475 int (*ide_dma_end)(ide_drive_t *drive);
476 int (*ide_dma_test_irq)(ide_drive_t *drive);
477 void (*ide_dma_clear_irq)(ide_drive_t *drive);
478 void (*dma_lost_irq)(ide_drive_t *drive);
479 void (*dma_timeout)(ide_drive_t *drive);
481 void (*OUTB)(u8 addr, unsigned long port);
482 void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
483 void (*OUTW)(u16 addr, unsigned long port);
484 void (*OUTSW)(unsigned long port, void *addr, u32 count);
485 void (*OUTSL)(unsigned long port, void *addr, u32 count);
487 u8 (*INB)(unsigned long port);
488 u16 (*INW)(unsigned long port);
489 void (*INSW)(unsigned long port, void *addr, u32 count);
490 void (*INSL)(unsigned long port, void *addr, u32 count);
492 /* dma physical region descriptor table (cpu view) */
493 unsigned int *dmatable_cpu;
494 /* dma physical region descriptor table (dma view) */
495 dma_addr_t dmatable_dma;
496 /* Scatter-gather list used to build the above */
497 struct scatterlist *sg_table;
498 int sg_max_nents; /* Maximum number of entries in it */
499 int sg_nents; /* Current number of entries in it */
500 int sg_dma_direction; /* dma transfer direction */
502 /* data phase of the active command (currently only valid for PIO/DMA) */
507 struct scatterlist *cursg;
508 unsigned int cursg_ofs;
510 int rqsize; /* max sectors per request */
511 int irq; /* our irq number */
513 unsigned long dma_base; /* base addr for dma ports */
514 unsigned long dma_command; /* dma command register */
515 unsigned long dma_vendor1; /* dma vendor 1 register */
516 unsigned long dma_status; /* dma status register */
517 unsigned long dma_vendor3; /* dma vendor 3 register */
518 unsigned long dma_prdtable; /* actual prd table address */
520 unsigned long config_data; /* for use by chipset-specific code */
521 unsigned long select_data; /* for use by chipset-specific code */
523 unsigned long extra_base; /* extra addr for dma ports */
524 unsigned extra_ports; /* number of extra dma ports */
526 unsigned noprobe : 1; /* don't probe for this interface */
527 unsigned present : 1; /* this interface exists */
528 unsigned serialized : 1; /* serialized all channel operation */
529 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
530 unsigned reset : 1; /* reset after probe */
531 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
532 unsigned mmio : 1; /* host uses MMIO */
533 unsigned straight8 : 1; /* Alan's straight 8 check */
535 struct device gendev;
536 struct device *portdev;
538 struct completion gendev_rel_comp; /* To deal with device release() */
540 void *hwif_data; /* extra hwif data */
544 #ifdef CONFIG_BLK_DEV_IDEACPI
545 struct ide_acpi_hwif_link *acpidata;
547 } ____cacheline_internodealigned_in_smp ide_hwif_t;
550 * internal ide interrupt handler type
552 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
553 typedef int (ide_expiry_t)(ide_drive_t *);
555 /* used by ide-cd, ide-floppy, etc. */
556 typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
558 typedef struct hwgroup_s {
559 /* irq handler, if active */
560 ide_startstop_t (*handler)(ide_drive_t *);
562 /* BOOL: protects all fields below */
564 /* BOOL: wake us up on timer expiry */
565 unsigned int sleeping : 1;
566 /* BOOL: polling active & poll_timeout field valid */
567 unsigned int polling : 1;
568 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
569 unsigned int resetting : 1;
573 /* ptr to current hwif in linked-list */
576 /* current request */
580 struct timer_list timer;
581 /* timeout value during long polls */
582 unsigned long poll_timeout;
583 /* queried upon timeouts */
584 int (*expiry)(ide_drive_t *);
590 typedef struct ide_driver_s ide_driver_t;
592 extern struct mutex ide_setting_mtx;
594 int set_io_32bit(ide_drive_t *, int);
595 int set_pio_mode(ide_drive_t *, int);
596 int set_using_dma(ide_drive_t *, int);
598 #ifdef CONFIG_IDE_PROC_FS
600 * configurable drive settings
607 #define SETTING_READ (1 << 0)
608 #define SETTING_WRITE (1 << 1)
609 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
611 typedef int (ide_procset_t)(ide_drive_t *, int);
612 typedef struct ide_settings_s {
623 struct ide_settings_s *next;
626 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
629 * /proc/ide interface
634 read_proc_t *read_proc;
635 write_proc_t *write_proc;
638 void proc_ide_create(void);
639 void proc_ide_destroy(void);
640 void ide_proc_register_port(ide_hwif_t *);
641 void ide_proc_port_register_devices(ide_hwif_t *);
642 void ide_proc_unregister_device(ide_drive_t *);
643 void ide_proc_unregister_port(ide_hwif_t *);
644 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
645 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
647 void ide_add_generic_settings(ide_drive_t *);
649 read_proc_t proc_ide_read_capacity;
650 read_proc_t proc_ide_read_geometry;
652 #ifdef CONFIG_BLK_DEV_IDEPCI
653 void ide_pci_create_host_proc(const char *, get_info_t *);
657 * Standard exit stuff:
659 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
668 *start = page + off; \
672 static inline void proc_ide_create(void) { ; }
673 static inline void proc_ide_destroy(void) { ; }
674 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
675 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
676 static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
677 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
678 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
679 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
680 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
681 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
685 * Power Management step value (rq->pm->pm_step).
687 * The step value starts at 0 (ide_pm_state_start_suspend) for a
688 * suspend operation or 1000 (ide_pm_state_start_resume) for a
691 * For each step, the core calls the subdriver start_power_step() first.
693 * - ide_stopped : In this case, the core calls us back again unless
694 * step have been set to ide_power_state_completed.
695 * - ide_started : In this case, the channel is left busy until an
696 * async event (interrupt) occurs.
697 * Typically, start_power_step() will issue a taskfile request with
700 * Upon reception of the interrupt, the core will call complete_power_step()
701 * with the error code if any. This routine should update the step value
702 * and return. It should not start a new request. The core will call
703 * start_power_step for the new step value, unless step have been set to
704 * ide_power_state_completed.
706 * Subdrivers are expected to define their own additional power
707 * steps from 1..999 for suspend and from 1001..1999 for resume,
708 * other values are reserved for future use.
712 ide_pm_state_completed = -1,
713 ide_pm_state_start_suspend = 0,
714 ide_pm_state_start_resume = 1000,
718 * Subdrivers support.
720 * The gendriver.owner field should be set to the module owner of this driver.
721 * The gendriver.name field should be set to the name of this driver
723 struct ide_driver_s {
726 unsigned supports_dsc_overlap : 1;
727 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
728 int (*end_request)(ide_drive_t *, int, int);
729 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
730 ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
731 struct device_driver gen_driver;
732 int (*probe)(ide_drive_t *);
733 void (*remove)(ide_drive_t *);
734 void (*resume)(ide_drive_t *);
735 void (*shutdown)(ide_drive_t *);
736 #ifdef CONFIG_IDE_PROC_FS
737 ide_proc_entry_t *proc;
741 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
743 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
746 * ide_hwifs[] is the master data structure used to keep track
747 * of just about everything in ide.c. Whenever possible, routines
748 * should be using pointers to a drive (ide_drive_t *) or
749 * pointers to a hwif (ide_hwif_t *), rather than indexing this
750 * structure directly (the allocation/layout may change!).
754 extern ide_hwif_t ide_hwifs[]; /* master data repository */
756 extern int noautodma;
758 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
759 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
760 int uptodate, int nr_sectors);
762 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
764 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
767 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
769 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
771 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
773 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
775 extern void ide_fix_driveid(struct hd_driveid *);
777 extern void ide_fixstring(u8 *, const int, const int);
779 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
781 extern ide_startstop_t ide_do_reset (ide_drive_t *);
783 extern void ide_init_drive_cmd (struct request *rq);
786 * "action" parameter type for ide_do_drive_cmd() below.
789 ide_wait, /* insert rq at end of list, and wait for it */
790 ide_preempt, /* insert rq in front of current request */
791 ide_head_wait, /* insert rq in front of current request and wait for it */
792 ide_end /* insert rq at end of list, but don't wait for it */
795 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
797 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
800 IDE_TFLAG_LBA48 = (1 << 0),
801 IDE_TFLAG_NO_SELECT_MASK = (1 << 1),
802 IDE_TFLAG_FLAGGED = (1 << 2),
803 IDE_TFLAG_OUT_DATA = (1 << 3),
804 IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
805 IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
806 IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
807 IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
808 IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
809 IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
810 IDE_TFLAG_OUT_HOB_NSECT |
811 IDE_TFLAG_OUT_HOB_LBAL |
812 IDE_TFLAG_OUT_HOB_LBAM |
813 IDE_TFLAG_OUT_HOB_LBAH,
814 IDE_TFLAG_OUT_FEATURE = (1 << 9),
815 IDE_TFLAG_OUT_NSECT = (1 << 10),
816 IDE_TFLAG_OUT_LBAL = (1 << 11),
817 IDE_TFLAG_OUT_LBAM = (1 << 12),
818 IDE_TFLAG_OUT_LBAH = (1 << 13),
819 IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
820 IDE_TFLAG_OUT_NSECT |
824 IDE_TFLAG_OUT_DEVICE = (1 << 14),
825 IDE_TFLAG_WRITE = (1 << 15),
826 IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16),
827 IDE_TFLAG_IN_DATA = (1 << 17),
828 IDE_TFLAG_CUSTOM_HANDLER = (1 << 18),
829 IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19),
830 IDE_TFLAG_IN_HOB_FEATURE = (1 << 20),
831 IDE_TFLAG_IN_HOB_NSECT = (1 << 21),
832 IDE_TFLAG_IN_HOB_LBAL = (1 << 22),
833 IDE_TFLAG_IN_HOB_LBAM = (1 << 23),
834 IDE_TFLAG_IN_HOB_LBAH = (1 << 24),
835 IDE_TFLAG_IN_HOB_LBA = IDE_TFLAG_IN_HOB_LBAL |
836 IDE_TFLAG_IN_HOB_LBAM |
837 IDE_TFLAG_IN_HOB_LBAH,
838 IDE_TFLAG_IN_HOB = IDE_TFLAG_IN_HOB_FEATURE |
839 IDE_TFLAG_IN_HOB_NSECT |
840 IDE_TFLAG_IN_HOB_LBA,
841 IDE_TFLAG_IN_NSECT = (1 << 25),
842 IDE_TFLAG_IN_LBAL = (1 << 26),
843 IDE_TFLAG_IN_LBAM = (1 << 27),
844 IDE_TFLAG_IN_LBAH = (1 << 28),
845 IDE_TFLAG_IN_LBA = IDE_TFLAG_IN_LBAL |
848 IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT |
850 IDE_TFLAG_IN_DEVICE = (1 << 29),
851 IDE_TFLAG_HOB = IDE_TFLAG_OUT_HOB |
853 IDE_TFLAG_TF = IDE_TFLAG_OUT_TF |
855 IDE_TFLAG_DEVICE = IDE_TFLAG_OUT_DEVICE |
857 /* force 16-bit I/O operations */
858 IDE_TFLAG_IO_16BIT = (1 << 30),
859 /* ide_task_t was allocated using kmalloc() */
860 IDE_TFLAG_DYN = (1 << 31),
863 struct ide_taskfile {
864 u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
866 u8 hob_feature; /* 1-5: additional data to support LBA48 */
872 u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
875 u8 error; /* read: error */
876 u8 feature; /* write: feature */
879 u8 nsect; /* 8: number of sectors */
880 u8 lbal; /* 9: LBA low */
881 u8 lbam; /* 10: LBA mid */
882 u8 lbah; /* 11: LBA high */
884 u8 device; /* 12: device select */
887 u8 status; /*  read: status  */
888 u8 command; /* write: command */
892 typedef struct ide_task_s {
894 struct ide_taskfile tf;
899 struct request *rq; /* copy of request */
900 void *special; /* valid_t generally */
903 void ide_tf_load(ide_drive_t *, ide_task_t *);
904 void ide_tf_read(ide_drive_t *, ide_task_t *);
906 extern void SELECT_DRIVE(ide_drive_t *);
907 extern void SELECT_MASK(ide_drive_t *, int);
909 extern int drive_is_ready(ide_drive_t *);
911 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
913 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
915 void task_end_request(ide_drive_t *, struct request *, u8);
917 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
918 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
920 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
921 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
922 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
924 extern int system_bus_clock(void);
926 extern int ide_driveid_update(ide_drive_t *);
927 extern int ide_config_drive_speed(ide_drive_t *, u8);
928 extern u8 eighty_ninty_three (ide_drive_t *);
929 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
931 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
933 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
935 extern int ide_spin_wait_hwgroup(ide_drive_t *);
936 extern void ide_timer_expiry(unsigned long);
937 extern irqreturn_t ide_intr(int irq, void *dev_id);
938 extern void do_ide_request(struct request_queue *);
940 void ide_init_disk(struct gendisk *, ide_drive_t *);
942 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
943 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
944 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
946 #define ide_pci_register_driver(d) pci_register_driver(d)
949 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
950 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
952 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
953 void ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
955 static inline void ide_hwif_setup_dma(ide_hwif_t *hwif,
956 const struct ide_port_info *d) { }
959 extern void default_hwif_iops(ide_hwif_t *);
960 extern void default_hwif_mmiops(ide_hwif_t *);
961 extern void default_hwif_transport(ide_hwif_t *);
963 typedef struct ide_pci_enablebit_s {
964 u8 reg; /* byte pci reg holding the enable-bit */
965 u8 mask; /* mask to isolate the enable-bit */
966 u8 val; /* value of masked reg when "enabled" */
967 } ide_pci_enablebit_t;
970 /* Uses ISA control ports not PCI ones. */
971 IDE_HFLAG_ISA_PORTS = (1 << 0),
972 /* single port device */
973 IDE_HFLAG_SINGLE = (1 << 1),
974 /* don't use legacy PIO blacklist */
975 IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
976 /* don't use conservative PIO "downgrade" */
977 IDE_HFLAG_PIO_NO_DOWNGRADE = (1 << 3),
978 /* use PIO8/9 for prefetch off/on */
979 IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
980 /* use PIO6/7 for fast-devsel off/on */
981 IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
982 /* use 100-102 and 200-202 PIO values to set DMA modes */
983 IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
985 * keep DMA setting when programming PIO mode, may be used only
986 * for hosts which have separate PIO and DMA timings (ie. PMAC)
988 IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
989 /* program host for the transfer mode after programming device */
990 IDE_HFLAG_POST_SET_MODE = (1 << 8),
991 /* don't program host/device for the transfer mode ("smart" hosts) */
992 IDE_HFLAG_NO_SET_MODE = (1 << 9),
993 /* trust BIOS for programming chipset/device for DMA */
994 IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
995 /* host uses VDMA (tied with IDE_HFLAG_CS5520 for now) */
996 IDE_HFLAG_VDMA = (1 << 11),
997 /* ATAPI DMA is unsupported */
998 IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
999 /* set if host is a "bootable" controller */
1000 IDE_HFLAG_BOOTABLE = (1 << 13),
1001 /* host doesn't support DMA */
1002 IDE_HFLAG_NO_DMA = (1 << 14),
1003 /* check if host is PCI IDE device before allowing DMA */
1004 IDE_HFLAG_NO_AUTODMA = (1 << 15),
1005 /* don't autotune PIO */
1006 IDE_HFLAG_NO_AUTOTUNE = (1 << 16),
1007 /* host is CS5510/CS5520 */
1008 IDE_HFLAG_CS5520 = IDE_HFLAG_VDMA,
1010 IDE_HFLAG_NO_LBA48 = (1 << 17),
1012 IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
1013 /* data FIFO is cleared by an error */
1014 IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
1015 /* serialize ports */
1016 IDE_HFLAG_SERIALIZE = (1 << 20),
1017 /* use legacy IRQs */
1018 IDE_HFLAG_LEGACY_IRQS = (1 << 21),
1019 /* force use of legacy IRQs */
1020 IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
1021 /* limit LBA48 requests to 256 sectors */
1022 IDE_HFLAG_RQSIZE_256 = (1 << 23),
1023 /* use 32-bit I/O ops */
1024 IDE_HFLAG_IO_32BIT = (1 << 24),
1026 IDE_HFLAG_UNMASK_IRQS = (1 << 25),
1027 IDE_HFLAG_ABUSE_SET_DMA_MODE = (1 << 26),
1028 /* host is CY82C693 */
1029 IDE_HFLAG_CY82C693 = (1 << 27),
1030 /* force host out of "simplex" mode */
1031 IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
1032 /* DSC overlap is unsupported */
1033 IDE_HFLAG_NO_DSC = (1 << 29),
1034 /* never use 32-bit I/O ops */
1035 IDE_HFLAG_NO_IO_32BIT = (1 << 30),
1036 /* never unmask IRQs */
1037 IDE_HFLAG_NO_UNMASK_IRQS = (1 << 31),
1040 #ifdef CONFIG_BLK_DEV_OFFBOARD
1041 # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_BOOTABLE
1043 # define IDE_HFLAG_OFF_BOARD 0
1046 struct ide_port_info {
1048 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1049 void (*init_iops)(ide_hwif_t *);
1050 void (*init_hwif)(ide_hwif_t *);
1051 void (*init_dma)(ide_hwif_t *, unsigned long);
1052 ide_pci_enablebit_t enablebits[2];
1053 hwif_chipset_t chipset;
1062 int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1063 int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1065 void ide_map_sg(ide_drive_t *, struct request *);
1066 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1068 #define BAD_DMA_DRIVE 0
1069 #define GOOD_DMA_DRIVE 1
1071 struct drive_list_entry {
1072 const char *id_model;
1073 const char *id_firmware;
1076 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1078 #ifdef CONFIG_BLK_DEV_IDEDMA
1079 int __ide_dma_bad_drive(ide_drive_t *);
1080 int ide_id_dma_bug(ide_drive_t *);
1082 u8 ide_find_dma_mode(ide_drive_t *, u8);
1084 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1086 return ide_find_dma_mode(drive, XFER_UDMA_6);
1089 void ide_dma_off_quietly(ide_drive_t *);
1090 void ide_dma_off(ide_drive_t *);
1091 void ide_dma_on(ide_drive_t *);
1092 int ide_set_dma(ide_drive_t *);
1093 void ide_check_dma_crc(ide_drive_t *);
1094 ide_startstop_t ide_dma_intr(ide_drive_t *);
1096 int ide_build_sglist(ide_drive_t *, struct request *);
1097 void ide_destroy_dmatable(ide_drive_t *);
1099 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1100 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1101 extern int ide_release_dma(ide_hwif_t *);
1102 extern void ide_setup_dma(ide_hwif_t *, unsigned long);
1104 void ide_dma_host_set(ide_drive_t *, int);
1105 extern int ide_dma_setup(ide_drive_t *);
1106 extern void ide_dma_start(ide_drive_t *);
1107 extern int __ide_dma_end(ide_drive_t *);
1108 extern void ide_dma_lost_irq(ide_drive_t *);
1109 extern void ide_dma_timeout(ide_drive_t *);
1110 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1113 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1114 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1115 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1116 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1117 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1118 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1119 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1120 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1121 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1122 #endif /* CONFIG_BLK_DEV_IDEDMA */
1124 #ifndef CONFIG_BLK_DEV_IDEDMA_SFF
1125 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1128 #ifdef CONFIG_BLK_DEV_IDEACPI
1129 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1130 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1131 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1132 extern void ide_acpi_init(ide_hwif_t *hwif);
1133 void ide_acpi_port_init_devices(ide_hwif_t *);
1134 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1136 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1137 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1138 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1139 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1140 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1141 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1144 void ide_remove_port_from_hwgroup(ide_hwif_t *);
1145 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1146 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1147 void ide_unregister(unsigned int);
1149 void ide_register_region(struct gendisk *);
1150 void ide_unregister_region(struct gendisk *);
1152 void ide_undecoded_slave(ide_drive_t *);
1154 int ide_device_add_all(u8 *idx, const struct ide_port_info *);
1155 int ide_device_add(u8 idx[4], const struct ide_port_info *);
1156 void ide_port_unregister_devices(ide_hwif_t *);
1157 void ide_port_scan(ide_hwif_t *);
1159 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1161 return hwif->hwif_data;
1164 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1166 hwif->hwif_data = data;
1169 const char *ide_xfer_verbose(u8 mode);
1170 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1171 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1173 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1175 return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1178 static inline int ide_dev_is_sata(struct hd_driveid *id)
1181 * See if word 93 is 0 AND drive is at least ATA-5 compatible
1182 * verifying that word 80 by casting it to a signed type --
1183 * this trick allows us to filter out the reserved values of
1184 * 0x0000 and 0xffff along with the earlier ATA revisions...
1186 if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1191 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1192 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1194 typedef struct ide_pio_timings_s {
1195 int setup_time; /* Address setup (ns) minimum */
1196 int active_time; /* Active pulse (ns) minimum */
1197 int cycle_time; /* Cycle time (ns) minimum = */
1198 /* active + recovery (+ setup for some chips) */
1199 } ide_pio_timings_t;
1201 unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
1202 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1203 extern const ide_pio_timings_t ide_pio_timings[6];
1205 int ide_set_pio_mode(ide_drive_t *, u8);
1206 int ide_set_dma_mode(ide_drive_t *, u8);
1208 void ide_set_pio(ide_drive_t *, u8);
1210 static inline void ide_set_max_pio(ide_drive_t *drive)
1212 ide_set_pio(drive, 255);
1215 extern spinlock_t ide_lock;
1216 extern struct mutex ide_cfg_mtx;
1218 * Structure locking:
1220 * ide_cfg_mtx and ide_lock together protect changes to
1221 * ide_hwif_t->{next,hwgroup}
1224 * ide_hwgroup_t->busy: ide_lock
1225 * ide_hwgroup_t->hwif: ide_lock
1226 * ide_hwif_t->mate: constant, no locking
1227 * ide_drive_t->hwif: constant, no locking
1230 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1232 extern struct bus_type ide_bus_type;
1233 extern struct class *ide_port_class;
1235 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1236 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1238 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1239 #define ide_id_has_flush_cache_ext(id) \
1240 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1242 static inline void ide_dump_identify(u8 *id)
1244 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1247 static inline int hwif_to_node(ide_hwif_t *hwif)
1249 struct pci_dev *dev = to_pci_dev(hwif->dev);
1250 return hwif->dev ? pcibus_to_node(dev->bus) : -1;
1253 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1255 ide_hwif_t *hwif = HWIF(drive);
1257 return &hwif->drives[(drive->dn ^ 1) & 1];
1260 static inline void ide_set_irq(ide_drive_t *drive, int on)
1262 ide_hwif_t *hwif = drive->hwif;
1264 hwif->OUTB(drive->ctl | (on ? 0 : 2),
1265 hwif->io_ports[IDE_CONTROL_OFFSET]);
1268 static inline u8 ide_read_status(ide_drive_t *drive)
1270 ide_hwif_t *hwif = drive->hwif;
1272 return hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
1275 static inline u8 ide_read_altstatus(ide_drive_t *drive)
1277 ide_hwif_t *hwif = drive->hwif;
1279 return hwif->INB(hwif->io_ports[IDE_CONTROL_OFFSET]);
1282 static inline u8 ide_read_error(ide_drive_t *drive)
1284 ide_hwif_t *hwif = drive->hwif;
1286 return hwif->INB(hwif->io_ports[IDE_ERROR_OFFSET]);
1290 * Too bad. The drive wants to send us data which we are not ready to accept.
1291 * Just throw it away.
1293 static inline void ide_atapi_discard_data(ide_drive_t *drive, unsigned bcount)
1295 ide_hwif_t *hwif = drive->hwif;
1297 /* FIXME: use ->atapi_input_bytes */
1299 (void)hwif->INB(hwif->io_ports[IDE_DATA_OFFSET]);
1302 static inline void ide_atapi_write_zeros(ide_drive_t *drive, unsigned bcount)
1304 ide_hwif_t *hwif = drive->hwif;
1306 /* FIXME: use ->atapi_output_bytes */
1308 hwif->OUTB(0, hwif->io_ports[IDE_DATA_OFFSET]);