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/hdsmart.h>
13 #include <linux/blkdev.h>
14 #include <linux/proc_fs.h>
15 #include <linux/interrupt.h>
16 #include <linux/bitops.h>
17 #include <linux/bio.h>
18 #include <linux/device.h>
19 #include <linux/pci.h>
20 #include <linux/completion.h>
21 #ifdef CONFIG_BLK_DEV_IDEACPI
22 #include <acpi/acpi.h>
24 #include <asm/byteorder.h>
25 #include <asm/system.h>
27 #include <asm/semaphore.h>
28 #include <asm/mutex.h>
30 #if defined(CRIS) || defined(FRV)
31 # define SUPPORT_VLB_SYNC 0
33 # define SUPPORT_VLB_SYNC 1
37 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
41 #define IDE_NO_IRQ (-1)
43 typedef unsigned char byte; /* used everywhere */
46 * Probably not wise to fiddle with these
48 #define ERROR_MAX 8 /* Max read/write errors per sector */
49 #define ERROR_RESET 3 /* Reset controller every 4th retry */
50 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
55 #define IDE_TUNE_NOAUTO 2
56 #define IDE_TUNE_AUTO 1
57 #define IDE_TUNE_DEFAULT 0
63 #define DMA_PIO_RETRY 1 /* retrying in PIO */
65 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
66 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
69 * Definitions for accessing IDE controller registers
71 #define IDE_NR_PORTS (10)
73 #define IDE_DATA_OFFSET (0)
74 #define IDE_ERROR_OFFSET (1)
75 #define IDE_NSECTOR_OFFSET (2)
76 #define IDE_SECTOR_OFFSET (3)
77 #define IDE_LCYL_OFFSET (4)
78 #define IDE_HCYL_OFFSET (5)
79 #define IDE_SELECT_OFFSET (6)
80 #define IDE_STATUS_OFFSET (7)
81 #define IDE_CONTROL_OFFSET (8)
82 #define IDE_IRQ_OFFSET (9)
84 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
85 #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
87 #define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
88 #define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
89 #define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
90 #define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
91 #define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
92 #define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
93 #define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
94 #define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
95 #define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
96 #define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
98 #define IDE_FEATURE_REG IDE_ERROR_REG
99 #define IDE_COMMAND_REG IDE_STATUS_REG
100 #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
101 #define IDE_IREASON_REG IDE_NSECTOR_REG
102 #define IDE_BCOUNTL_REG IDE_LCYL_REG
103 #define IDE_BCOUNTH_REG IDE_HCYL_REG
105 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
106 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
107 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
108 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
109 #define DRIVE_READY (READY_STAT | SEEK_STAT)
110 #define DATA_READY (DRQ_STAT)
112 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
114 #define SATA_NR_PORTS (3) /* 16 possible ?? */
116 #define SATA_STATUS_OFFSET (0)
117 #define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
118 #define SATA_ERROR_OFFSET (1)
119 #define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
120 #define SATA_CONTROL_OFFSET (2)
121 #define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
123 #define SATA_MISC_OFFSET (0)
124 #define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
125 #define SATA_PHY_OFFSET (1)
126 #define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
127 #define SATA_IEN_OFFSET (2)
128 #define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
131 * Our Physical Region Descriptor (PRD) table should be large enough
132 * to handle the biggest I/O request we are likely to see. Since requests
133 * can have no more than 256 sectors, and since the typical blocksize is
134 * two or more sectors, we could get by with a limit of 128 entries here for
135 * the usual worst case. Most requests seem to include some contiguous blocks,
136 * further reducing the number of table entries required.
138 * The driver reverts to PIO mode for individual requests that exceed
139 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
140 * 100% of all crazy scenarios here is not necessary.
142 * As it turns out though, we must allocate a full 4KB page for this,
143 * so the two PRD tables (ide0 & ide1) will each get half of that,
144 * allowing each to have about 256 entries (8 bytes each) from this.
147 #define PRD_ENTRIES 256
150 * Some more useful definitions
152 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
153 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
154 #define SECTOR_SIZE 512
155 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
156 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
159 * Timeouts for various operations:
161 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
162 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
163 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
164 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
165 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
166 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
169 * Check for an interrupt and acknowledge the interrupt status
172 typedef int (ide_ack_intr_t)(struct hwif_s *);
175 * hwif_chipset_t is used to keep track of the specific hardware
176 * chipset used by each IDE interface, if known.
178 enum { ide_unknown, ide_generic, ide_pci,
179 ide_cmd640, ide_dtc2278, ide_ali14xx,
180 ide_qd65xx, ide_umc8672, ide_ht6560b,
181 ide_rz1000, ide_trm290,
182 ide_cmd646, ide_cy82c693, ide_4drives,
183 ide_pmac, ide_etrax100, ide_acorn,
184 ide_au1xxx, ide_forced
187 typedef u8 hwif_chipset_t;
190 * Structure to hold all information about the location of this port
192 typedef struct hw_regs_s {
193 unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
194 int irq; /* our irq number */
195 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
196 hwif_chipset_t chipset;
200 struct hwif_s * ide_find_port(unsigned long);
202 int ide_register_hw(hw_regs_t *, void (*)(struct hwif_s *), int,
205 void ide_setup_ports( hw_regs_t *hw,
210 ide_ack_intr_t *ack_intr,
216 static inline void ide_std_init_ports(hw_regs_t *hw,
217 unsigned long io_addr,
218 unsigned long ctl_addr)
222 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
223 hw->io_ports[i] = io_addr++;
225 hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
230 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
232 #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
235 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
236 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
237 # define ide_default_io_base(index) (0)
238 # define ide_default_irq(base) (0)
239 # define ide_init_default_irq(base) (0)
242 #ifdef CONFIG_IDE_ARCH_OBSOLETE_INIT
243 static inline void ide_init_hwif_ports(hw_regs_t *hw,
244 unsigned long io_addr,
245 unsigned long ctl_addr,
249 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
251 ide_std_init_ports(hw, io_addr, ctl_addr);
256 hw->io_ports[IDE_IRQ_OFFSET] = 0;
259 if (ppc_ide_md.ide_init_hwif)
260 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
264 static inline void ide_init_hwif_ports(hw_regs_t *hw,
265 unsigned long io_addr,
266 unsigned long ctl_addr,
269 if (io_addr || ctl_addr)
270 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
272 #endif /* CONFIG_IDE_ARCH_OBSOLETE_INIT */
274 /* Currently only m68k, apus and m8xx need it */
275 #ifndef IDE_ARCH_ACK_INTR
276 # define ide_ack_intr(hwif) (1)
279 /* Currently only Atari needs it */
280 #ifndef IDE_ARCH_LOCK
281 # define ide_release_lock() do {} while (0)
282 # define ide_get_lock(hdlr, data) do {} while (0)
283 #endif /* IDE_ARCH_LOCK */
286 * Now for the data we need to maintain per-drive: ide_drive_t
289 #define ide_scsi 0x21
290 #define ide_disk 0x20
291 #define ide_optical 0x7
292 #define ide_cdrom 0x5
294 #define ide_floppy 0x0
297 * Special Driver Flags
299 * set_geometry : respecify drive geometry
300 * recalibrate : seek to cyl 0
301 * set_multmode : set multmode count
302 * set_tune : tune interface for drive
303 * serviced : service command
309 unsigned set_geometry : 1;
310 unsigned recalibrate : 1;
311 unsigned set_multmode : 1;
312 unsigned set_tune : 1;
313 unsigned serviced : 1;
314 unsigned reserved : 3;
319 * ATA-IDE Select Register, aka Device-Head
321 * head : always zeros here
322 * unit : drive select number: 0/1
324 * lba : using LBA instead of CHS
330 #if defined(__LITTLE_ENDIAN_BITFIELD)
336 #elif defined(__BIG_ENDIAN_BITFIELD)
343 #error "Please fix <asm/byteorder.h>"
346 } select_t, ata_select_t;
349 * ATAPI Interrupt Reason Register.
351 * cod : Information transferred is command (1) or data (0)
352 * io : The device requests us to read (1) or write (0)
353 * reserved : Reserved
358 #if defined(__LITTLE_ENDIAN_BITFIELD)
361 unsigned reserved :6;
362 #elif defined(__BIG_ENDIAN_BITFIELD)
363 unsigned reserved :6;
367 #error "Please fix <asm/byteorder.h>"
373 * Status returned from various ide_ functions
376 ide_stopped, /* no drive operation was started */
377 ide_started, /* a drive operation was started, handler was set */
381 struct ide_settings_s;
383 #ifdef CONFIG_BLK_DEV_IDEACPI
384 struct ide_acpi_drive_link;
385 struct ide_acpi_hwif_link;
388 typedef struct ide_drive_s {
389 char name[4]; /* drive name, such as "hda" */
390 char driver_req[10]; /* requests specific driver */
392 struct request_queue *queue; /* request queue */
394 struct request *rq; /* current request */
395 struct ide_drive_s *next; /* circular list of hwgroup drives */
396 void *driver_data; /* extra driver data */
397 struct hd_driveid *id; /* drive model identification info */
398 #ifdef CONFIG_IDE_PROC_FS
399 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
400 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
402 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
404 unsigned long sleep; /* sleep until this time */
405 unsigned long service_start; /* time we started last request */
406 unsigned long service_time; /* service time of last request */
407 unsigned long timeout; /* max time to wait for irq */
409 special_t special; /* special action flags */
410 select_t select; /* basic drive/head select reg value */
412 u8 keep_settings; /* restore settings after drive reset */
413 u8 using_dma; /* disk is using dma for read/write */
414 u8 retry_pio; /* retrying dma capable host in pio */
415 u8 state; /* retry state */
416 u8 waiting_for_dma; /* dma currently in progress */
417 u8 unmask; /* okay to unmask other irqs */
418 u8 bswap; /* byte swap data */
419 u8 noflush; /* don't attempt flushes */
420 u8 dsc_overlap; /* DSC overlap */
421 u8 nice1; /* give potential excess bandwidth */
423 unsigned present : 1; /* drive is physically present */
424 unsigned dead : 1; /* device ejected hint */
425 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
426 unsigned noprobe : 1; /* from: hdx=noprobe */
427 unsigned removable : 1; /* 1 if need to do check_media_change */
428 unsigned attach : 1; /* needed for removable devices */
429 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
430 unsigned no_unmask : 1; /* disallow setting unmask bit */
431 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
432 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
433 unsigned nice0 : 1; /* give obvious excess bandwidth */
434 unsigned nice2 : 1; /* give a share in our own bandwidth */
435 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
436 unsigned nodma : 1; /* disallow DMA */
437 unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
438 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
439 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
440 unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
441 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
442 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
443 unsigned post_reset : 1;
444 unsigned udma33_warned : 1;
446 u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
447 u8 quirk_list; /* considered quirky, set for a specific host */
448 u8 init_speed; /* transfer rate set at boot */
449 u8 current_speed; /* current transfer rate set */
450 u8 desired_speed; /* desired transfer rate set */
451 u8 dn; /* now wide spread use */
452 u8 wcache; /* status of write cache */
453 u8 acoustic; /* acoustic management */
454 u8 media; /* disk, cdrom, tape, floppy, ... */
455 u8 ctl; /* "normal" value for IDE_CONTROL_REG */
456 u8 ready_stat; /* min status value for drive ready */
457 u8 mult_count; /* current multiple sector setting */
458 u8 mult_req; /* requested multiple sector setting */
459 u8 tune_req; /* requested drive tuning setting */
460 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
461 u8 bad_wstat; /* used for ignoring WRERR_STAT */
462 u8 nowerr; /* used for ignoring WRERR_STAT */
463 u8 sect0; /* offset of first sector for DM6:DDO */
464 u8 head; /* "real" number of heads */
465 u8 sect; /* "real" sectors per track */
466 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
467 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
469 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
470 unsigned int cyl; /* "real" number of cyls */
471 unsigned int drive_data; /* used by set_pio_mode/selectproc */
472 unsigned int failures; /* current failure count */
473 unsigned int max_failures; /* maximum allowed failure count */
474 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
476 u64 capacity64; /* total number of sectors */
478 int lun; /* logical unit */
479 int crc_count; /* crc counter to reduce drive speed */
480 #ifdef CONFIG_BLK_DEV_IDEACPI
481 struct ide_acpi_drive_link *acpidata;
483 struct list_head list;
484 struct device gendev;
485 struct completion gendev_rel_comp; /* to deal with device release() */
488 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
490 #define IDE_CHIPSET_PCI_MASK \
491 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
492 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
494 struct ide_port_info;
496 typedef struct hwif_s {
497 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
498 struct hwif_s *mate; /* other hwif from same PCI chip */
499 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
500 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
502 char name[6]; /* name of interface, eg. "ide0" */
504 /* task file registers for pata and sata */
505 unsigned long io_ports[IDE_NR_PORTS];
506 unsigned long sata_scr[SATA_NR_PORTS];
507 unsigned long sata_misc[SATA_NR_PORTS];
509 ide_drive_t drives[MAX_DRIVES]; /* drive info */
511 u8 major; /* our major number */
512 u8 index; /* 0 for ide0; 1 for ide1; ... */
513 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
514 u8 straight8; /* Alan's straight 8 check */
515 u8 bus_state; /* power state of the IDE bus */
525 u8 cbl; /* cable type */
527 hwif_chipset_t chipset; /* sub-module for tuning.. */
529 struct pci_dev *pci_dev; /* for pci chipsets */
530 const struct ide_port_info *cds; /* chipset device struct */
532 ide_ack_intr_t *ack_intr;
534 void (*rw_disk)(ide_drive_t *, struct request *);
537 ide_hwif_ops_t *hwifops;
539 /* routine to program host for PIO mode */
540 void (*set_pio_mode)(ide_drive_t *, const u8);
541 /* routine to program host for DMA mode */
542 void (*set_dma_mode)(ide_drive_t *, const u8);
543 /* tweaks hardware to select drive */
544 void (*selectproc)(ide_drive_t *);
545 /* chipset polling based on hba specifics */
546 int (*reset_poll)(ide_drive_t *);
547 /* chipset specific changes to default for device-hba resets */
548 void (*pre_reset)(ide_drive_t *);
549 /* routine to reset controller after a disk reset */
550 void (*resetproc)(ide_drive_t *);
551 /* special interrupt handling for shared pci interrupts */
552 void (*intrproc)(ide_drive_t *);
553 /* special host masking for drive selection */
554 void (*maskproc)(ide_drive_t *, int);
555 /* check host's drive quirk list */
556 int (*quirkproc)(ide_drive_t *);
557 /* driver soft-power interface */
558 int (*busproc)(ide_drive_t *, int);
560 u8 (*mdma_filter)(ide_drive_t *);
561 u8 (*udma_filter)(ide_drive_t *);
563 void (*fixup)(struct hwif_s *);
565 void (*ata_input_data)(ide_drive_t *, void *, u32);
566 void (*ata_output_data)(ide_drive_t *, void *, u32);
568 void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
569 void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
571 int (*dma_setup)(ide_drive_t *);
572 void (*dma_exec_cmd)(ide_drive_t *, u8);
573 void (*dma_start)(ide_drive_t *);
574 int (*ide_dma_end)(ide_drive_t *drive);
575 int (*ide_dma_on)(ide_drive_t *drive);
576 void (*dma_off_quietly)(ide_drive_t *drive);
577 int (*ide_dma_test_irq)(ide_drive_t *drive);
578 void (*ide_dma_clear_irq)(ide_drive_t *drive);
579 void (*dma_host_on)(ide_drive_t *drive);
580 void (*dma_host_off)(ide_drive_t *drive);
581 void (*dma_lost_irq)(ide_drive_t *drive);
582 void (*dma_timeout)(ide_drive_t *drive);
584 void (*OUTB)(u8 addr, unsigned long port);
585 void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
586 void (*OUTW)(u16 addr, unsigned long port);
587 void (*OUTSW)(unsigned long port, void *addr, u32 count);
588 void (*OUTSL)(unsigned long port, void *addr, u32 count);
590 u8 (*INB)(unsigned long port);
591 u16 (*INW)(unsigned long port);
592 void (*INSW)(unsigned long port, void *addr, u32 count);
593 void (*INSL)(unsigned long port, void *addr, u32 count);
595 /* dma physical region descriptor table (cpu view) */
596 unsigned int *dmatable_cpu;
597 /* dma physical region descriptor table (dma view) */
598 dma_addr_t dmatable_dma;
599 /* Scatter-gather list used to build the above */
600 struct scatterlist *sg_table;
601 int sg_max_nents; /* Maximum number of entries in it */
602 int sg_nents; /* Current number of entries in it */
603 int sg_dma_direction; /* dma transfer direction */
605 /* data phase of the active command (currently only valid for PIO/DMA) */
610 struct scatterlist *cursg;
611 unsigned int cursg_ofs;
613 int rqsize; /* max sectors per request */
614 int irq; /* our irq number */
616 unsigned long dma_base; /* base addr for dma ports */
617 unsigned long dma_command; /* dma command register */
618 unsigned long dma_vendor1; /* dma vendor 1 register */
619 unsigned long dma_status; /* dma status register */
620 unsigned long dma_vendor3; /* dma vendor 3 register */
621 unsigned long dma_prdtable; /* actual prd table address */
623 unsigned long config_data; /* for use by chipset-specific code */
624 unsigned long select_data; /* for use by chipset-specific code */
626 unsigned long extra_base; /* extra addr for dma ports */
627 unsigned extra_ports; /* number of extra dma ports */
629 unsigned noprobe : 1; /* don't probe for this interface */
630 unsigned present : 1; /* this interface exists */
631 unsigned hold : 1; /* this interface is always present */
632 unsigned serialized : 1; /* serialized all channel operation */
633 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
634 unsigned reset : 1; /* reset after probe */
635 unsigned auto_poll : 1; /* supports nop auto-poll */
636 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
637 unsigned no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
638 unsigned mmio : 1; /* host uses MMIO */
640 struct device gendev;
641 struct completion gendev_rel_comp; /* To deal with device release() */
643 void *hwif_data; /* extra hwif data */
647 #ifdef CONFIG_BLK_DEV_IDEACPI
648 struct ide_acpi_hwif_link *acpidata;
650 } ____cacheline_internodealigned_in_smp ide_hwif_t;
653 * internal ide interrupt handler type
655 typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
656 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
657 typedef int (ide_expiry_t)(ide_drive_t *);
659 typedef struct hwgroup_s {
660 /* irq handler, if active */
661 ide_startstop_t (*handler)(ide_drive_t *);
662 /* irq handler, suspended if active */
663 ide_startstop_t (*handler_save)(ide_drive_t *);
664 /* BOOL: protects all fields below */
666 /* BOOL: wake us up on timer expiry */
667 unsigned int sleeping : 1;
668 /* BOOL: polling active & poll_timeout field valid */
669 unsigned int polling : 1;
670 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
671 unsigned int resetting : 1;
675 /* ptr to current hwif in linked-list */
678 /* for pci chipsets */
679 struct pci_dev *pci_dev;
681 /* current request */
684 struct timer_list timer;
685 /* local copy of current write rq */
687 /* timeout value during long polls */
688 unsigned long poll_timeout;
689 /* queried upon timeouts */
690 int (*expiry)(ide_drive_t *);
691 /* ide_system_bus_speed */
696 unsigned char cmd_buf[4];
699 typedef struct ide_driver_s ide_driver_t;
701 extern struct mutex ide_setting_mtx;
703 int set_io_32bit(ide_drive_t *, int);
704 int set_pio_mode(ide_drive_t *, int);
705 int set_using_dma(ide_drive_t *, int);
707 #ifdef CONFIG_IDE_PROC_FS
709 * configurable drive settings
716 #define SETTING_READ (1 << 0)
717 #define SETTING_WRITE (1 << 1)
718 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
720 typedef int (ide_procset_t)(ide_drive_t *, int);
721 typedef struct ide_settings_s {
732 struct ide_settings_s *next;
735 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
738 * /proc/ide interface
743 read_proc_t *read_proc;
744 write_proc_t *write_proc;
747 void proc_ide_create(void);
748 void proc_ide_destroy(void);
749 void ide_proc_register_port(ide_hwif_t *);
750 void ide_proc_unregister_port(ide_hwif_t *);
751 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
752 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
754 void ide_add_generic_settings(ide_drive_t *);
756 read_proc_t proc_ide_read_capacity;
757 read_proc_t proc_ide_read_geometry;
759 #ifdef CONFIG_BLK_DEV_IDEPCI
760 void ide_pci_create_host_proc(const char *, get_info_t *);
764 * Standard exit stuff:
766 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
775 *start = page + off; \
779 static inline void proc_ide_create(void) { ; }
780 static inline void proc_ide_destroy(void) { ; }
781 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
782 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
783 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
784 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
785 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
786 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
790 * Power Management step value (rq->pm->pm_step).
792 * The step value starts at 0 (ide_pm_state_start_suspend) for a
793 * suspend operation or 1000 (ide_pm_state_start_resume) for a
796 * For each step, the core calls the subdriver start_power_step() first.
798 * - ide_stopped : In this case, the core calls us back again unless
799 * step have been set to ide_power_state_completed.
800 * - ide_started : In this case, the channel is left busy until an
801 * async event (interrupt) occurs.
802 * Typically, start_power_step() will issue a taskfile request with
805 * Upon reception of the interrupt, the core will call complete_power_step()
806 * with the error code if any. This routine should update the step value
807 * and return. It should not start a new request. The core will call
808 * start_power_step for the new step value, unless step have been set to
809 * ide_power_state_completed.
811 * Subdrivers are expected to define their own additional power
812 * steps from 1..999 for suspend and from 1001..1999 for resume,
813 * other values are reserved for future use.
817 ide_pm_state_completed = -1,
818 ide_pm_state_start_suspend = 0,
819 ide_pm_state_start_resume = 1000,
823 * Subdrivers support.
825 * The gendriver.owner field should be set to the module owner of this driver.
826 * The gendriver.name field should be set to the name of this driver
828 struct ide_driver_s {
831 unsigned supports_dsc_overlap : 1;
832 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
833 int (*end_request)(ide_drive_t *, int, int);
834 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
835 ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
836 struct device_driver gen_driver;
837 int (*probe)(ide_drive_t *);
838 void (*remove)(ide_drive_t *);
839 void (*resume)(ide_drive_t *);
840 void (*shutdown)(ide_drive_t *);
841 #ifdef CONFIG_IDE_PROC_FS
842 ide_proc_entry_t *proc;
846 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
848 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
851 * ide_hwifs[] is the master data structure used to keep track
852 * of just about everything in ide.c. Whenever possible, routines
853 * should be using pointers to a drive (ide_drive_t *) or
854 * pointers to a hwif (ide_hwif_t *), rather than indexing this
855 * structure directly (the allocation/layout may change!).
859 extern ide_hwif_t ide_hwifs[]; /* master data repository */
861 extern int noautodma;
863 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
864 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
865 int uptodate, int nr_sectors);
867 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
869 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
872 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
874 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
876 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
878 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
880 extern void ide_fix_driveid(struct hd_driveid *);
882 extern void ide_fixstring(u8 *, const int, const int);
884 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
886 extern ide_startstop_t ide_do_reset (ide_drive_t *);
888 extern void ide_init_drive_cmd (struct request *rq);
891 * "action" parameter type for ide_do_drive_cmd() below.
894 ide_wait, /* insert rq at end of list, and wait for it */
895 ide_preempt, /* insert rq in front of current request */
896 ide_head_wait, /* insert rq in front of current request and wait for it */
897 ide_end /* insert rq at end of list, but don't wait for it */
900 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
902 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
905 * Issue ATA command and wait for completion.
906 * Use for implementing commands in kernel
908 * (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
910 extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
913 IDE_TFLAG_LBA48 = (1 << 0),
914 IDE_TFLAG_NO_SELECT_MASK = (1 << 1),
915 IDE_TFLAG_FLAGGED = (1 << 2),
916 IDE_TFLAG_OUT_DATA = (1 << 3),
917 IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
918 IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
919 IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
920 IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
921 IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
922 IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
923 IDE_TFLAG_OUT_HOB_NSECT |
924 IDE_TFLAG_OUT_HOB_LBAL |
925 IDE_TFLAG_OUT_HOB_LBAM |
926 IDE_TFLAG_OUT_HOB_LBAH,
927 IDE_TFLAG_OUT_FEATURE = (1 << 9),
928 IDE_TFLAG_OUT_NSECT = (1 << 10),
929 IDE_TFLAG_OUT_LBAL = (1 << 11),
930 IDE_TFLAG_OUT_LBAM = (1 << 12),
931 IDE_TFLAG_OUT_LBAH = (1 << 13),
932 IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
933 IDE_TFLAG_OUT_NSECT |
937 IDE_TFLAG_OUT_DEVICE = (1 << 14),
940 struct ide_taskfile {
941 u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
943 u8 hob_feature; /* 1-5: additional data to support LBA48 */
949 u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
952 u8 error; /* read: error */
953 u8 feature; /* write: feature */
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 */
961 u8 device; /* 12: device select */
964 u8 status; /*  read: status  */
965 u8 command; /* write: command */
969 typedef struct ide_task_s {
971 struct ide_taskfile tf;
975 ide_reg_valid_t tf_in_flags;
978 ide_pre_handler_t *prehandler;
979 ide_handler_t *handler;
980 struct request *rq; /* copy of request */
981 void *special; /* valid_t generally */
984 void ide_tf_load(ide_drive_t *, ide_task_t *);
986 extern u32 ide_read_24(ide_drive_t *);
988 extern void SELECT_DRIVE(ide_drive_t *);
989 extern void SELECT_INTERRUPT(ide_drive_t *);
990 extern void SELECT_MASK(ide_drive_t *, int);
991 extern void QUIRK_LIST(ide_drive_t *);
993 extern int drive_is_ready(ide_drive_t *);
996 * taskfile io for disks for now...and builds request from ide_ioctl
998 extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1001 * Special Flagged Register Validation Caller
1003 extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
1005 extern ide_startstop_t set_multmode_intr(ide_drive_t *);
1006 extern ide_startstop_t set_geometry_intr(ide_drive_t *);
1007 extern ide_startstop_t recal_intr(ide_drive_t *);
1008 extern ide_startstop_t task_no_data_intr(ide_drive_t *);
1009 extern ide_startstop_t task_in_intr(ide_drive_t *);
1010 extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
1012 extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
1014 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
1016 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1017 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1018 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1020 extern int system_bus_clock(void);
1022 extern int ide_driveid_update(ide_drive_t *);
1023 extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
1024 extern int ide_config_drive_speed(ide_drive_t *, u8);
1025 extern u8 eighty_ninty_three (ide_drive_t *);
1026 extern int set_transfer(ide_drive_t *, ide_task_t *);
1027 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1029 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1031 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1033 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1034 extern void ide_timer_expiry(unsigned long);
1035 extern irqreturn_t ide_intr(int irq, void *dev_id);
1036 extern void do_ide_request(struct request_queue *);
1038 void ide_init_disk(struct gendisk *, ide_drive_t *);
1040 extern int ideprobe_init(void);
1042 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1043 extern void ide_scan_pcibus(int scan_direction) __init;
1044 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1045 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1047 #define ide_pci_register_driver(d) pci_register_driver(d)
1050 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
1051 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1053 extern void default_hwif_iops(ide_hwif_t *);
1054 extern void default_hwif_mmiops(ide_hwif_t *);
1055 extern void default_hwif_transport(ide_hwif_t *);
1057 typedef struct ide_pci_enablebit_s {
1058 u8 reg; /* byte pci reg holding the enable-bit */
1059 u8 mask; /* mask to isolate the enable-bit */
1060 u8 val; /* value of masked reg when "enabled" */
1061 } ide_pci_enablebit_t;
1064 /* Uses ISA control ports not PCI ones. */
1065 IDE_HFLAG_ISA_PORTS = (1 << 0),
1066 /* single port device */
1067 IDE_HFLAG_SINGLE = (1 << 1),
1068 /* don't use legacy PIO blacklist */
1069 IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
1070 /* don't use conservative PIO "downgrade" */
1071 IDE_HFLAG_PIO_NO_DOWNGRADE = (1 << 3),
1072 /* use PIO8/9 for prefetch off/on */
1073 IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
1074 /* use PIO6/7 for fast-devsel off/on */
1075 IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
1076 /* use 100-102 and 200-202 PIO values to set DMA modes */
1077 IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
1079 * keep DMA setting when programming PIO mode, may be used only
1080 * for hosts which have separate PIO and DMA timings (ie. PMAC)
1082 IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1083 /* program host for the transfer mode after programming device */
1084 IDE_HFLAG_POST_SET_MODE = (1 << 8),
1085 /* don't program host/device for the transfer mode ("smart" hosts) */
1086 IDE_HFLAG_NO_SET_MODE = (1 << 9),
1087 /* trust BIOS for programming chipset/device for DMA */
1088 IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
1089 /* host uses VDMA */
1090 IDE_HFLAG_VDMA = (1 << 11),
1091 /* ATAPI DMA is unsupported */
1092 IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
1093 /* set if host is a "bootable" controller */
1094 IDE_HFLAG_BOOTABLE = (1 << 13),
1095 /* host doesn't support DMA */
1096 IDE_HFLAG_NO_DMA = (1 << 14),
1097 /* check if host is PCI IDE device before allowing DMA */
1098 IDE_HFLAG_NO_AUTODMA = (1 << 15),
1099 /* host is CS5510/CS5520 */
1100 IDE_HFLAG_CS5520 = (1 << 16),
1102 IDE_HFLAG_NO_LBA48 = (1 << 17),
1104 IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
1105 /* data FIFO is cleared by an error */
1106 IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
1107 /* serialize ports */
1108 IDE_HFLAG_SERIALIZE = (1 << 20),
1109 /* use legacy IRQs */
1110 IDE_HFLAG_LEGACY_IRQS = (1 << 21),
1111 /* force use of legacy IRQs */
1112 IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
1113 /* limit LBA48 requests to 256 sectors */
1114 IDE_HFLAG_RQSIZE_256 = (1 << 23),
1115 /* use 32-bit I/O ops */
1116 IDE_HFLAG_IO_32BIT = (1 << 24),
1118 IDE_HFLAG_UNMASK_IRQS = (1 << 25),
1121 #ifdef CONFIG_BLK_DEV_OFFBOARD
1122 # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_BOOTABLE
1124 # define IDE_HFLAG_OFF_BOARD 0
1127 struct ide_port_info {
1129 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1130 void (*init_iops)(ide_hwif_t *);
1131 void (*init_hwif)(ide_hwif_t *);
1132 void (*init_dma)(ide_hwif_t *, unsigned long);
1133 void (*fixup)(ide_hwif_t *);
1134 ide_pci_enablebit_t enablebits[2];
1135 hwif_chipset_t chipset;
1144 int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1145 int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1147 void ide_map_sg(ide_drive_t *, struct request *);
1148 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1150 #define BAD_DMA_DRIVE 0
1151 #define GOOD_DMA_DRIVE 1
1153 struct drive_list_entry {
1154 const char *id_model;
1155 const char *id_firmware;
1158 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1160 #ifdef CONFIG_BLK_DEV_IDEDMA
1161 int __ide_dma_bad_drive(ide_drive_t *);
1162 int ide_id_dma_bug(ide_drive_t *);
1164 u8 ide_find_dma_mode(ide_drive_t *, u8);
1166 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1168 return ide_find_dma_mode(drive, XFER_UDMA_6);
1171 void ide_dma_off(ide_drive_t *);
1172 int ide_set_dma(ide_drive_t *);
1173 ide_startstop_t ide_dma_intr(ide_drive_t *);
1175 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1176 extern int ide_build_sglist(ide_drive_t *, struct request *);
1177 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1178 extern void ide_destroy_dmatable(ide_drive_t *);
1179 extern int ide_release_dma(ide_hwif_t *);
1180 extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1182 void ide_dma_host_off(ide_drive_t *);
1183 void ide_dma_off_quietly(ide_drive_t *);
1184 void ide_dma_host_on(ide_drive_t *);
1185 extern int __ide_dma_on(ide_drive_t *);
1186 extern int ide_dma_setup(ide_drive_t *);
1187 extern void ide_dma_start(ide_drive_t *);
1188 extern int __ide_dma_end(ide_drive_t *);
1189 extern void ide_dma_lost_irq(ide_drive_t *);
1190 extern void ide_dma_timeout(ide_drive_t *);
1191 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1194 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1195 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1196 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1197 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1198 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1199 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1200 #endif /* CONFIG_BLK_DEV_IDEDMA */
1202 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1203 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1206 #ifdef CONFIG_BLK_DEV_IDEACPI
1207 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1208 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1209 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1210 extern void ide_acpi_init(ide_hwif_t *hwif);
1211 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1213 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1214 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1215 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1216 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1217 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1220 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1221 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1222 extern void ide_unregister (unsigned int index);
1224 void ide_register_region(struct gendisk *);
1225 void ide_unregister_region(struct gendisk *);
1227 void ide_undecoded_slave(ide_hwif_t *);
1229 int ide_device_add(u8 idx[4]);
1231 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1233 return hwif->hwif_data;
1236 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1238 hwif->hwif_data = data;
1241 const char *ide_xfer_verbose(u8 mode);
1242 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1243 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1245 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1247 return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1250 static inline int ide_dev_is_sata(struct hd_driveid *id)
1253 * See if word 93 is 0 AND drive is at least ATA-5 compatible
1254 * verifying that word 80 by casting it to a signed type --
1255 * this trick allows us to filter out the reserved values of
1256 * 0x0000 and 0xffff along with the earlier ATA revisions...
1258 if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1263 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1265 typedef struct ide_pio_timings_s {
1266 int setup_time; /* Address setup (ns) minimum */
1267 int active_time; /* Active pulse (ns) minimum */
1268 int cycle_time; /* Cycle time (ns) minimum = */
1269 /* active + recovery (+ setup for some chips) */
1270 } ide_pio_timings_t;
1272 unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
1273 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1274 extern const ide_pio_timings_t ide_pio_timings[6];
1276 int ide_set_pio_mode(ide_drive_t *, u8);
1277 int ide_set_dma_mode(ide_drive_t *, u8);
1279 void ide_set_pio(ide_drive_t *, u8);
1281 static inline void ide_set_max_pio(ide_drive_t *drive)
1283 ide_set_pio(drive, 255);
1286 extern spinlock_t ide_lock;
1287 extern struct mutex ide_cfg_mtx;
1289 * Structure locking:
1291 * ide_cfg_mtx and ide_lock together protect changes to
1292 * ide_hwif_t->{next,hwgroup}
1295 * ide_hwgroup_t->busy: ide_lock
1296 * ide_hwgroup_t->hwif: ide_lock
1297 * ide_hwif_t->mate: constant, no locking
1298 * ide_drive_t->hwif: constant, no locking
1301 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1303 extern struct bus_type ide_bus_type;
1305 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1306 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1308 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1309 #define ide_id_has_flush_cache_ext(id) \
1310 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1312 static inline int hwif_to_node(ide_hwif_t *hwif)
1314 struct pci_dev *dev = hwif->pci_dev;
1315 return dev ? pcibus_to_node(dev->bus) : -1;
1318 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1320 ide_hwif_t *hwif = HWIF(drive);
1322 return &hwif->drives[(drive->dn ^ 1) & 1];