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
86 #define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
87 #define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
88 #define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
89 #define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
90 #define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
91 #define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
92 #define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
93 #define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
94 #define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
95 #define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
97 #define IDE_FEATURE_REG IDE_ERROR_REG
98 #define IDE_COMMAND_REG IDE_STATUS_REG
99 #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
100 #define IDE_IREASON_REG IDE_NSECTOR_REG
101 #define IDE_BCOUNTL_REG IDE_LCYL_REG
102 #define IDE_BCOUNTH_REG IDE_HCYL_REG
104 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
105 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
106 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
107 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
108 #define DRIVE_READY (READY_STAT | SEEK_STAT)
110 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
112 #define SATA_NR_PORTS (3) /* 16 possible ?? */
114 #define SATA_STATUS_OFFSET (0)
115 #define SATA_ERROR_OFFSET (1)
116 #define SATA_CONTROL_OFFSET (2)
119 * Our Physical Region Descriptor (PRD) table should be large enough
120 * to handle the biggest I/O request we are likely to see. Since requests
121 * can have no more than 256 sectors, and since the typical blocksize is
122 * two or more sectors, we could get by with a limit of 128 entries here for
123 * the usual worst case. Most requests seem to include some contiguous blocks,
124 * further reducing the number of table entries required.
126 * The driver reverts to PIO mode for individual requests that exceed
127 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
128 * 100% of all crazy scenarios here is not necessary.
130 * As it turns out though, we must allocate a full 4KB page for this,
131 * so the two PRD tables (ide0 & ide1) will each get half of that,
132 * allowing each to have about 256 entries (8 bytes each) from this.
135 #define PRD_ENTRIES 256
138 * Some more useful definitions
140 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
141 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
142 #define SECTOR_SIZE 512
143 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
144 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
147 * Timeouts for various operations:
149 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
150 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
151 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
152 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
153 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
154 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
157 * Check for an interrupt and acknowledge the interrupt status
160 typedef int (ide_ack_intr_t)(struct hwif_s *);
163 * hwif_chipset_t is used to keep track of the specific hardware
164 * chipset used by each IDE interface, if known.
166 enum { ide_unknown, ide_generic, ide_pci,
167 ide_cmd640, ide_dtc2278, ide_ali14xx,
168 ide_qd65xx, ide_umc8672, ide_ht6560b,
169 ide_rz1000, ide_trm290,
170 ide_cmd646, ide_cy82c693, ide_4drives,
171 ide_pmac, ide_etrax100, ide_acorn,
172 ide_au1xxx, ide_palm3710
175 typedef u8 hwif_chipset_t;
178 * Structure to hold all information about the location of this port
180 typedef struct hw_regs_s {
181 unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
182 int irq; /* our irq number */
183 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
184 hwif_chipset_t chipset;
188 struct hwif_s * ide_find_port(unsigned long);
189 void ide_init_port_data(struct hwif_s *, unsigned int);
190 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
192 static inline void ide_std_init_ports(hw_regs_t *hw,
193 unsigned long io_addr,
194 unsigned long ctl_addr)
198 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
199 hw->io_ports[i] = io_addr++;
201 hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
206 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
208 #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
211 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
212 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
213 # define ide_default_io_base(index) (0)
214 # define ide_default_irq(base) (0)
215 # define ide_init_default_irq(base) (0)
218 /* Currently only m68k, apus and m8xx need it */
219 #ifndef IDE_ARCH_ACK_INTR
220 # define ide_ack_intr(hwif) (1)
223 /* Currently only Atari needs it */
224 #ifndef IDE_ARCH_LOCK
225 # define ide_release_lock() do {} while (0)
226 # define ide_get_lock(hdlr, data) do {} while (0)
227 #endif /* IDE_ARCH_LOCK */
230 * Now for the data we need to maintain per-drive: ide_drive_t
233 #define ide_scsi 0x21
234 #define ide_disk 0x20
235 #define ide_optical 0x7
236 #define ide_cdrom 0x5
238 #define ide_floppy 0x0
241 * Special Driver Flags
243 * set_geometry : respecify drive geometry
244 * recalibrate : seek to cyl 0
245 * set_multmode : set multmode count
246 * set_tune : tune interface for drive
247 * serviced : service command
253 unsigned set_geometry : 1;
254 unsigned recalibrate : 1;
255 unsigned set_multmode : 1;
256 unsigned set_tune : 1;
257 unsigned serviced : 1;
258 unsigned reserved : 3;
263 * ATA-IDE Select Register, aka Device-Head
265 * head : always zeros here
266 * unit : drive select number: 0/1
268 * lba : using LBA instead of CHS
274 #if defined(__LITTLE_ENDIAN_BITFIELD)
280 #elif defined(__BIG_ENDIAN_BITFIELD)
287 #error "Please fix <asm/byteorder.h>"
290 } select_t, ata_select_t;
293 * Status returned from various ide_ functions
296 ide_stopped, /* no drive operation was started */
297 ide_started, /* a drive operation was started, handler was set */
301 struct ide_settings_s;
303 #ifdef CONFIG_BLK_DEV_IDEACPI
304 struct ide_acpi_drive_link;
305 struct ide_acpi_hwif_link;
308 typedef struct ide_drive_s {
309 char name[4]; /* drive name, such as "hda" */
310 char driver_req[10]; /* requests specific driver */
312 struct request_queue *queue; /* request queue */
314 struct request *rq; /* current request */
315 struct ide_drive_s *next; /* circular list of hwgroup drives */
316 void *driver_data; /* extra driver data */
317 struct hd_driveid *id; /* drive model identification info */
318 #ifdef CONFIG_IDE_PROC_FS
319 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
320 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
322 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
324 unsigned long sleep; /* sleep until this time */
325 unsigned long service_start; /* time we started last request */
326 unsigned long service_time; /* service time of last request */
327 unsigned long timeout; /* max time to wait for irq */
329 special_t special; /* special action flags */
330 select_t select; /* basic drive/head select reg value */
332 u8 keep_settings; /* restore settings after drive reset */
333 u8 using_dma; /* disk is using dma for read/write */
334 u8 retry_pio; /* retrying dma capable host in pio */
335 u8 state; /* retry state */
336 u8 waiting_for_dma; /* dma currently in progress */
337 u8 unmask; /* okay to unmask other irqs */
338 u8 noflush; /* don't attempt flushes */
339 u8 dsc_overlap; /* DSC overlap */
340 u8 nice1; /* give potential excess bandwidth */
342 unsigned present : 1; /* drive is physically present */
343 unsigned dead : 1; /* device ejected hint */
344 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
345 unsigned noprobe : 1; /* from: hdx=noprobe */
346 unsigned removable : 1; /* 1 if need to do check_media_change */
347 unsigned attach : 1; /* needed for removable devices */
348 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
349 unsigned no_unmask : 1; /* disallow setting unmask bit */
350 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
351 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
352 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
353 unsigned nodma : 1; /* disallow DMA */
354 unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
355 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
356 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
357 unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
358 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
359 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
360 unsigned post_reset : 1;
361 unsigned udma33_warned : 1;
363 u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
364 u8 quirk_list; /* considered quirky, set for a specific host */
365 u8 init_speed; /* transfer rate set at boot */
366 u8 current_speed; /* current transfer rate set */
367 u8 desired_speed; /* desired transfer rate set */
368 u8 dn; /* now wide spread use */
369 u8 wcache; /* status of write cache */
370 u8 acoustic; /* acoustic management */
371 u8 media; /* disk, cdrom, tape, floppy, ... */
372 u8 ctl; /* "normal" value for IDE_CONTROL_REG */
373 u8 ready_stat; /* min status value for drive ready */
374 u8 mult_count; /* current multiple sector setting */
375 u8 mult_req; /* requested multiple sector setting */
376 u8 tune_req; /* requested drive tuning setting */
377 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
378 u8 bad_wstat; /* used for ignoring WRERR_STAT */
379 u8 nowerr; /* used for ignoring WRERR_STAT */
380 u8 sect0; /* offset of first sector for DM6:DDO */
381 u8 head; /* "real" number of heads */
382 u8 sect; /* "real" sectors per track */
383 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
384 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
386 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
387 unsigned int cyl; /* "real" number of cyls */
388 unsigned int drive_data; /* used by set_pio_mode/selectproc */
389 unsigned int failures; /* current failure count */
390 unsigned int max_failures; /* maximum allowed failure count */
391 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
393 u64 capacity64; /* total number of sectors */
395 int lun; /* logical unit */
396 int crc_count; /* crc counter to reduce drive speed */
397 #ifdef CONFIG_BLK_DEV_IDEACPI
398 struct ide_acpi_drive_link *acpidata;
400 struct list_head list;
401 struct device gendev;
402 struct completion gendev_rel_comp; /* to deal with device release() */
405 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
407 #define IDE_CHIPSET_PCI_MASK \
408 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
409 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
411 struct ide_port_info;
413 typedef struct hwif_s {
414 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
415 struct hwif_s *mate; /* other hwif from same PCI chip */
416 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
417 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
419 char name[6]; /* name of interface, eg. "ide0" */
421 /* task file registers for pata and sata */
422 unsigned long io_ports[IDE_NR_PORTS];
423 unsigned long sata_scr[SATA_NR_PORTS];
425 ide_drive_t drives[MAX_DRIVES]; /* drive info */
427 u8 major; /* our major number */
428 u8 index; /* 0 for ide0; 1 for ide1; ... */
429 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
430 u8 bus_state; /* power state of the IDE bus */
440 u8 cbl; /* cable type */
442 hwif_chipset_t chipset; /* sub-module for tuning.. */
446 const struct ide_port_info *cds; /* chipset device struct */
448 ide_ack_intr_t *ack_intr;
450 void (*rw_disk)(ide_drive_t *, struct request *);
453 ide_hwif_ops_t *hwifops;
455 /* host specific initialization of devices on a port */
456 void (*port_init_devs)(struct hwif_s *);
457 /* routine to program host for PIO mode */
458 void (*set_pio_mode)(ide_drive_t *, const u8);
459 /* routine to program host for DMA mode */
460 void (*set_dma_mode)(ide_drive_t *, const u8);
461 /* tweaks hardware to select drive */
462 void (*selectproc)(ide_drive_t *);
463 /* chipset polling based on hba specifics */
464 int (*reset_poll)(ide_drive_t *);
465 /* chipset specific changes to default for device-hba resets */
466 void (*pre_reset)(ide_drive_t *);
467 /* routine to reset controller after a disk reset */
468 void (*resetproc)(ide_drive_t *);
469 /* special host masking for drive selection */
470 void (*maskproc)(ide_drive_t *, int);
471 /* check host's drive quirk list */
472 void (*quirkproc)(ide_drive_t *);
474 u8 (*mdma_filter)(ide_drive_t *);
475 u8 (*udma_filter)(ide_drive_t *);
477 u8 (*cable_detect)(struct hwif_s *);
479 void (*ata_input_data)(ide_drive_t *, void *, u32);
480 void (*ata_output_data)(ide_drive_t *, void *, u32);
482 void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
483 void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
485 void (*dma_host_set)(ide_drive_t *, int);
486 int (*dma_setup)(ide_drive_t *);
487 void (*dma_exec_cmd)(ide_drive_t *, u8);
488 void (*dma_start)(ide_drive_t *);
489 int (*ide_dma_end)(ide_drive_t *drive);
490 int (*ide_dma_test_irq)(ide_drive_t *drive);
491 void (*ide_dma_clear_irq)(ide_drive_t *drive);
492 void (*dma_lost_irq)(ide_drive_t *drive);
493 void (*dma_timeout)(ide_drive_t *drive);
495 void (*OUTB)(u8 addr, unsigned long port);
496 void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
497 void (*OUTW)(u16 addr, unsigned long port);
498 void (*OUTSW)(unsigned long port, void *addr, u32 count);
499 void (*OUTSL)(unsigned long port, void *addr, u32 count);
501 u8 (*INB)(unsigned long port);
502 u16 (*INW)(unsigned long port);
503 void (*INSW)(unsigned long port, void *addr, u32 count);
504 void (*INSL)(unsigned long port, void *addr, u32 count);
506 /* dma physical region descriptor table (cpu view) */
507 unsigned int *dmatable_cpu;
508 /* dma physical region descriptor table (dma view) */
509 dma_addr_t dmatable_dma;
510 /* Scatter-gather list used to build the above */
511 struct scatterlist *sg_table;
512 int sg_max_nents; /* Maximum number of entries in it */
513 int sg_nents; /* Current number of entries in it */
514 int sg_dma_direction; /* dma transfer direction */
516 /* data phase of the active command (currently only valid for PIO/DMA) */
521 struct scatterlist *cursg;
522 unsigned int cursg_ofs;
524 int rqsize; /* max sectors per request */
525 int irq; /* our irq number */
527 unsigned long dma_base; /* base addr for dma ports */
528 unsigned long dma_command; /* dma command register */
529 unsigned long dma_vendor1; /* dma vendor 1 register */
530 unsigned long dma_status; /* dma status register */
531 unsigned long dma_vendor3; /* dma vendor 3 register */
532 unsigned long dma_prdtable; /* actual prd table address */
534 unsigned long config_data; /* for use by chipset-specific code */
535 unsigned long select_data; /* for use by chipset-specific code */
537 unsigned long extra_base; /* extra addr for dma ports */
538 unsigned extra_ports; /* number of extra dma ports */
540 unsigned noprobe : 1; /* don't probe for this interface */
541 unsigned present : 1; /* this interface exists */
542 unsigned serialized : 1; /* serialized all channel operation */
543 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
544 unsigned reset : 1; /* reset after probe */
545 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
546 unsigned mmio : 1; /* host uses MMIO */
547 unsigned straight8 : 1; /* Alan's straight 8 check */
549 struct device gendev;
550 struct device *portdev;
552 struct completion gendev_rel_comp; /* To deal with device release() */
554 void *hwif_data; /* extra hwif data */
558 #ifdef CONFIG_BLK_DEV_IDEACPI
559 struct ide_acpi_hwif_link *acpidata;
561 } ____cacheline_internodealigned_in_smp ide_hwif_t;
564 * internal ide interrupt handler type
566 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
567 typedef int (ide_expiry_t)(ide_drive_t *);
569 /* used by ide-cd, ide-floppy, etc. */
570 typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
572 typedef struct hwgroup_s {
573 /* irq handler, if active */
574 ide_startstop_t (*handler)(ide_drive_t *);
576 /* BOOL: protects all fields below */
578 /* BOOL: wake us up on timer expiry */
579 unsigned int sleeping : 1;
580 /* BOOL: polling active & poll_timeout field valid */
581 unsigned int polling : 1;
582 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
583 unsigned int resetting : 1;
587 /* ptr to current hwif in linked-list */
590 /* current request */
594 struct timer_list timer;
595 /* timeout value during long polls */
596 unsigned long poll_timeout;
597 /* queried upon timeouts */
598 int (*expiry)(ide_drive_t *);
604 typedef struct ide_driver_s ide_driver_t;
606 extern struct mutex ide_setting_mtx;
608 int set_io_32bit(ide_drive_t *, int);
609 int set_pio_mode(ide_drive_t *, int);
610 int set_using_dma(ide_drive_t *, int);
612 #ifdef CONFIG_IDE_PROC_FS
614 * configurable drive settings
621 #define SETTING_READ (1 << 0)
622 #define SETTING_WRITE (1 << 1)
623 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
625 typedef int (ide_procset_t)(ide_drive_t *, int);
626 typedef struct ide_settings_s {
637 struct ide_settings_s *next;
640 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
643 * /proc/ide interface
648 read_proc_t *read_proc;
649 write_proc_t *write_proc;
652 void proc_ide_create(void);
653 void proc_ide_destroy(void);
654 void ide_proc_register_port(ide_hwif_t *);
655 void ide_proc_port_register_devices(ide_hwif_t *);
656 void ide_proc_unregister_device(ide_drive_t *);
657 void ide_proc_unregister_port(ide_hwif_t *);
658 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
659 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
661 void ide_add_generic_settings(ide_drive_t *);
663 read_proc_t proc_ide_read_capacity;
664 read_proc_t proc_ide_read_geometry;
666 #ifdef CONFIG_BLK_DEV_IDEPCI
667 void ide_pci_create_host_proc(const char *, get_info_t *);
671 * Standard exit stuff:
673 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
682 *start = page + off; \
686 static inline void proc_ide_create(void) { ; }
687 static inline void proc_ide_destroy(void) { ; }
688 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
689 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
690 static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
691 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
692 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
693 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
694 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
695 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
699 * Power Management step value (rq->pm->pm_step).
701 * The step value starts at 0 (ide_pm_state_start_suspend) for a
702 * suspend operation or 1000 (ide_pm_state_start_resume) for a
705 * For each step, the core calls the subdriver start_power_step() first.
707 * - ide_stopped : In this case, the core calls us back again unless
708 * step have been set to ide_power_state_completed.
709 * - ide_started : In this case, the channel is left busy until an
710 * async event (interrupt) occurs.
711 * Typically, start_power_step() will issue a taskfile request with
714 * Upon reception of the interrupt, the core will call complete_power_step()
715 * with the error code if any. This routine should update the step value
716 * and return. It should not start a new request. The core will call
717 * start_power_step for the new step value, unless step have been set to
718 * ide_power_state_completed.
720 * Subdrivers are expected to define their own additional power
721 * steps from 1..999 for suspend and from 1001..1999 for resume,
722 * other values are reserved for future use.
726 ide_pm_state_completed = -1,
727 ide_pm_state_start_suspend = 0,
728 ide_pm_state_start_resume = 1000,
732 * Subdrivers support.
734 * The gendriver.owner field should be set to the module owner of this driver.
735 * The gendriver.name field should be set to the name of this driver
737 struct ide_driver_s {
740 unsigned supports_dsc_overlap : 1;
741 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
742 int (*end_request)(ide_drive_t *, int, int);
743 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
744 ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
745 struct device_driver gen_driver;
746 int (*probe)(ide_drive_t *);
747 void (*remove)(ide_drive_t *);
748 void (*resume)(ide_drive_t *);
749 void (*shutdown)(ide_drive_t *);
750 #ifdef CONFIG_IDE_PROC_FS
751 ide_proc_entry_t *proc;
755 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
757 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
760 * ide_hwifs[] is the master data structure used to keep track
761 * of just about everything in ide.c. Whenever possible, routines
762 * should be using pointers to a drive (ide_drive_t *) or
763 * pointers to a hwif (ide_hwif_t *), rather than indexing this
764 * structure directly (the allocation/layout may change!).
768 extern ide_hwif_t ide_hwifs[]; /* master data repository */
770 extern int noautodma;
772 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
773 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
774 int uptodate, int nr_sectors);
776 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
778 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
781 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
783 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
785 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
787 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
789 extern void ide_fix_driveid(struct hd_driveid *);
791 extern void ide_fixstring(u8 *, const int, const int);
793 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
795 extern ide_startstop_t ide_do_reset (ide_drive_t *);
797 extern void ide_init_drive_cmd (struct request *rq);
800 * "action" parameter type for ide_do_drive_cmd() below.
803 ide_wait, /* insert rq at end of list, and wait for it */
804 ide_preempt, /* insert rq in front of current request */
805 ide_head_wait, /* insert rq in front of current request and wait for it */
806 ide_end /* insert rq at end of list, but don't wait for it */
809 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
811 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
814 IDE_TFLAG_LBA48 = (1 << 0),
815 IDE_TFLAG_NO_SELECT_MASK = (1 << 1),
816 IDE_TFLAG_FLAGGED = (1 << 2),
817 IDE_TFLAG_OUT_DATA = (1 << 3),
818 IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
819 IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
820 IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
821 IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
822 IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
823 IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
824 IDE_TFLAG_OUT_HOB_NSECT |
825 IDE_TFLAG_OUT_HOB_LBAL |
826 IDE_TFLAG_OUT_HOB_LBAM |
827 IDE_TFLAG_OUT_HOB_LBAH,
828 IDE_TFLAG_OUT_FEATURE = (1 << 9),
829 IDE_TFLAG_OUT_NSECT = (1 << 10),
830 IDE_TFLAG_OUT_LBAL = (1 << 11),
831 IDE_TFLAG_OUT_LBAM = (1 << 12),
832 IDE_TFLAG_OUT_LBAH = (1 << 13),
833 IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
834 IDE_TFLAG_OUT_NSECT |
838 IDE_TFLAG_OUT_DEVICE = (1 << 14),
839 IDE_TFLAG_WRITE = (1 << 15),
840 IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16),
841 IDE_TFLAG_IN_DATA = (1 << 17),
842 IDE_TFLAG_CUSTOM_HANDLER = (1 << 18),
843 IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19),
844 IDE_TFLAG_IN_HOB_FEATURE = (1 << 20),
845 IDE_TFLAG_IN_HOB_NSECT = (1 << 21),
846 IDE_TFLAG_IN_HOB_LBAL = (1 << 22),
847 IDE_TFLAG_IN_HOB_LBAM = (1 << 23),
848 IDE_TFLAG_IN_HOB_LBAH = (1 << 24),
849 IDE_TFLAG_IN_HOB_LBA = IDE_TFLAG_IN_HOB_LBAL |
850 IDE_TFLAG_IN_HOB_LBAM |
851 IDE_TFLAG_IN_HOB_LBAH,
852 IDE_TFLAG_IN_HOB = IDE_TFLAG_IN_HOB_FEATURE |
853 IDE_TFLAG_IN_HOB_NSECT |
854 IDE_TFLAG_IN_HOB_LBA,
855 IDE_TFLAG_IN_NSECT = (1 << 25),
856 IDE_TFLAG_IN_LBAL = (1 << 26),
857 IDE_TFLAG_IN_LBAM = (1 << 27),
858 IDE_TFLAG_IN_LBAH = (1 << 28),
859 IDE_TFLAG_IN_LBA = IDE_TFLAG_IN_LBAL |
862 IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT |
864 IDE_TFLAG_IN_DEVICE = (1 << 29),
865 IDE_TFLAG_HOB = IDE_TFLAG_OUT_HOB |
867 IDE_TFLAG_TF = IDE_TFLAG_OUT_TF |
869 IDE_TFLAG_DEVICE = IDE_TFLAG_OUT_DEVICE |
871 /* force 16-bit I/O operations */
872 IDE_TFLAG_IO_16BIT = (1 << 30),
873 /* ide_task_t was allocated using kmalloc() */
874 IDE_TFLAG_DYN = (1 << 31),
877 struct ide_taskfile {
878 u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
880 u8 hob_feature; /* 1-5: additional data to support LBA48 */
886 u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
889 u8 error; /* read: error */
890 u8 feature; /* write: feature */
893 u8 nsect; /* 8: number of sectors */
894 u8 lbal; /* 9: LBA low */
895 u8 lbam; /* 10: LBA mid */
896 u8 lbah; /* 11: LBA high */
898 u8 device; /* 12: device select */
901 u8 status; /*  read: status  */
902 u8 command; /* write: command */
906 typedef struct ide_task_s {
908 struct ide_taskfile tf;
913 struct request *rq; /* copy of request */
914 void *special; /* valid_t generally */
917 void ide_tf_load(ide_drive_t *, ide_task_t *);
918 void ide_tf_read(ide_drive_t *, ide_task_t *);
920 extern void SELECT_DRIVE(ide_drive_t *);
921 extern void SELECT_MASK(ide_drive_t *, int);
923 extern int drive_is_ready(ide_drive_t *);
925 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
927 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
929 void task_end_request(ide_drive_t *, struct request *, u8);
931 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
932 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
934 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
935 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
936 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
938 extern int system_bus_clock(void);
940 extern int ide_driveid_update(ide_drive_t *);
941 extern int ide_config_drive_speed(ide_drive_t *, u8);
942 extern u8 eighty_ninty_three (ide_drive_t *);
943 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
945 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
947 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
949 extern int ide_spin_wait_hwgroup(ide_drive_t *);
950 extern void ide_timer_expiry(unsigned long);
951 extern irqreturn_t ide_intr(int irq, void *dev_id);
952 extern void do_ide_request(struct request_queue *);
954 void ide_init_disk(struct gendisk *, ide_drive_t *);
956 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
957 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
958 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
960 #define ide_pci_register_driver(d) pci_register_driver(d)
963 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
964 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
966 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
967 void ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
969 static inline void ide_hwif_setup_dma(ide_hwif_t *hwif,
970 const struct ide_port_info *d) { }
973 extern void default_hwif_iops(ide_hwif_t *);
974 extern void default_hwif_mmiops(ide_hwif_t *);
975 extern void default_hwif_transport(ide_hwif_t *);
977 typedef struct ide_pci_enablebit_s {
978 u8 reg; /* byte pci reg holding the enable-bit */
979 u8 mask; /* mask to isolate the enable-bit */
980 u8 val; /* value of masked reg when "enabled" */
981 } ide_pci_enablebit_t;
984 /* Uses ISA control ports not PCI ones. */
985 IDE_HFLAG_ISA_PORTS = (1 << 0),
986 /* single port device */
987 IDE_HFLAG_SINGLE = (1 << 1),
988 /* don't use legacy PIO blacklist */
989 IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
990 /* don't use conservative PIO "downgrade" */
991 IDE_HFLAG_PIO_NO_DOWNGRADE = (1 << 3),
992 /* use PIO8/9 for prefetch off/on */
993 IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
994 /* use PIO6/7 for fast-devsel off/on */
995 IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
996 /* use 100-102 and 200-202 PIO values to set DMA modes */
997 IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
999 * keep DMA setting when programming PIO mode, may be used only
1000 * for hosts which have separate PIO and DMA timings (ie. PMAC)
1002 IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1003 /* program host for the transfer mode after programming device */
1004 IDE_HFLAG_POST_SET_MODE = (1 << 8),
1005 /* don't program host/device for the transfer mode ("smart" hosts) */
1006 IDE_HFLAG_NO_SET_MODE = (1 << 9),
1007 /* trust BIOS for programming chipset/device for DMA */
1008 IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
1009 /* host uses VDMA (tied with IDE_HFLAG_CS5520 for now) */
1010 IDE_HFLAG_VDMA = (1 << 11),
1011 /* ATAPI DMA is unsupported */
1012 IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
1013 /* set if host is a "bootable" controller */
1014 IDE_HFLAG_BOOTABLE = (1 << 13),
1015 /* host doesn't support DMA */
1016 IDE_HFLAG_NO_DMA = (1 << 14),
1017 /* check if host is PCI IDE device before allowing DMA */
1018 IDE_HFLAG_NO_AUTODMA = (1 << 15),
1019 /* don't autotune PIO */
1020 IDE_HFLAG_NO_AUTOTUNE = (1 << 16),
1021 /* host is CS5510/CS5520 */
1022 IDE_HFLAG_CS5520 = IDE_HFLAG_VDMA,
1024 IDE_HFLAG_NO_LBA48 = (1 << 17),
1026 IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
1027 /* data FIFO is cleared by an error */
1028 IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
1029 /* serialize ports */
1030 IDE_HFLAG_SERIALIZE = (1 << 20),
1031 /* use legacy IRQs */
1032 IDE_HFLAG_LEGACY_IRQS = (1 << 21),
1033 /* force use of legacy IRQs */
1034 IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
1035 /* limit LBA48 requests to 256 sectors */
1036 IDE_HFLAG_RQSIZE_256 = (1 << 23),
1037 /* use 32-bit I/O ops */
1038 IDE_HFLAG_IO_32BIT = (1 << 24),
1040 IDE_HFLAG_UNMASK_IRQS = (1 << 25),
1041 IDE_HFLAG_ABUSE_SET_DMA_MODE = (1 << 26),
1042 /* host is CY82C693 */
1043 IDE_HFLAG_CY82C693 = (1 << 27),
1044 /* force host out of "simplex" mode */
1045 IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
1046 /* DSC overlap is unsupported */
1047 IDE_HFLAG_NO_DSC = (1 << 29),
1048 /* never use 32-bit I/O ops */
1049 IDE_HFLAG_NO_IO_32BIT = (1 << 30),
1050 /* never unmask IRQs */
1051 IDE_HFLAG_NO_UNMASK_IRQS = (1 << 31),
1054 #ifdef CONFIG_BLK_DEV_OFFBOARD
1055 # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_BOOTABLE
1057 # define IDE_HFLAG_OFF_BOARD 0
1060 struct ide_port_info {
1062 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1063 void (*init_iops)(ide_hwif_t *);
1064 void (*init_hwif)(ide_hwif_t *);
1065 void (*init_dma)(ide_hwif_t *, unsigned long);
1066 ide_pci_enablebit_t enablebits[2];
1067 hwif_chipset_t chipset;
1076 int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1077 int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1079 void ide_map_sg(ide_drive_t *, struct request *);
1080 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1082 #define BAD_DMA_DRIVE 0
1083 #define GOOD_DMA_DRIVE 1
1085 struct drive_list_entry {
1086 const char *id_model;
1087 const char *id_firmware;
1090 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1092 #ifdef CONFIG_BLK_DEV_IDEDMA
1093 int __ide_dma_bad_drive(ide_drive_t *);
1094 int ide_id_dma_bug(ide_drive_t *);
1096 u8 ide_find_dma_mode(ide_drive_t *, u8);
1098 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1100 return ide_find_dma_mode(drive, XFER_UDMA_6);
1103 void ide_dma_off_quietly(ide_drive_t *);
1104 void ide_dma_off(ide_drive_t *);
1105 void ide_dma_on(ide_drive_t *);
1106 int ide_set_dma(ide_drive_t *);
1107 void ide_check_dma_crc(ide_drive_t *);
1108 ide_startstop_t ide_dma_intr(ide_drive_t *);
1110 int ide_build_sglist(ide_drive_t *, struct request *);
1111 void ide_destroy_dmatable(ide_drive_t *);
1113 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1114 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1115 extern int ide_release_dma(ide_hwif_t *);
1116 extern void ide_setup_dma(ide_hwif_t *, unsigned long);
1118 void ide_dma_host_set(ide_drive_t *, int);
1119 extern int ide_dma_setup(ide_drive_t *);
1120 extern void ide_dma_start(ide_drive_t *);
1121 extern int __ide_dma_end(ide_drive_t *);
1122 extern void ide_dma_lost_irq(ide_drive_t *);
1123 extern void ide_dma_timeout(ide_drive_t *);
1124 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1127 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1128 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1129 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1130 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1131 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1132 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1133 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1134 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1135 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1136 #endif /* CONFIG_BLK_DEV_IDEDMA */
1138 #ifndef CONFIG_BLK_DEV_IDEDMA_SFF
1139 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1142 #ifdef CONFIG_BLK_DEV_IDEACPI
1143 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1144 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1145 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1146 extern void ide_acpi_init(ide_hwif_t *hwif);
1147 void ide_acpi_port_init_devices(ide_hwif_t *);
1148 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1150 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1151 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1152 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1153 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1154 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1155 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1158 void ide_remove_port_from_hwgroup(ide_hwif_t *);
1159 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1160 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1161 void ide_unregister(unsigned int);
1163 void ide_register_region(struct gendisk *);
1164 void ide_unregister_region(struct gendisk *);
1166 void ide_undecoded_slave(ide_drive_t *);
1168 int ide_device_add_all(u8 *idx, const struct ide_port_info *);
1169 int ide_device_add(u8 idx[4], const struct ide_port_info *);
1170 void ide_port_unregister_devices(ide_hwif_t *);
1171 void ide_port_scan(ide_hwif_t *);
1173 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1175 return hwif->hwif_data;
1178 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1180 hwif->hwif_data = data;
1183 const char *ide_xfer_verbose(u8 mode);
1184 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1185 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1187 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1189 return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1192 static inline int ide_dev_is_sata(struct hd_driveid *id)
1195 * See if word 93 is 0 AND drive is at least ATA-5 compatible
1196 * verifying that word 80 by casting it to a signed type --
1197 * this trick allows us to filter out the reserved values of
1198 * 0x0000 and 0xffff along with the earlier ATA revisions...
1200 if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1205 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1206 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1208 typedef struct ide_pio_timings_s {
1209 int setup_time; /* Address setup (ns) minimum */
1210 int active_time; /* Active pulse (ns) minimum */
1211 int cycle_time; /* Cycle time (ns) minimum = */
1212 /* active + recovery (+ setup for some chips) */
1213 } ide_pio_timings_t;
1215 unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
1216 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1217 extern const ide_pio_timings_t ide_pio_timings[6];
1219 int ide_set_pio_mode(ide_drive_t *, u8);
1220 int ide_set_dma_mode(ide_drive_t *, u8);
1222 void ide_set_pio(ide_drive_t *, u8);
1224 static inline void ide_set_max_pio(ide_drive_t *drive)
1226 ide_set_pio(drive, 255);
1229 extern spinlock_t ide_lock;
1230 extern struct mutex ide_cfg_mtx;
1232 * Structure locking:
1234 * ide_cfg_mtx and ide_lock together protect changes to
1235 * ide_hwif_t->{next,hwgroup}
1238 * ide_hwgroup_t->busy: ide_lock
1239 * ide_hwgroup_t->hwif: ide_lock
1240 * ide_hwif_t->mate: constant, no locking
1241 * ide_drive_t->hwif: constant, no locking
1244 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1246 extern struct bus_type ide_bus_type;
1247 extern struct class *ide_port_class;
1249 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1250 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1252 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1253 #define ide_id_has_flush_cache_ext(id) \
1254 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1256 static inline void ide_dump_identify(u8 *id)
1258 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1261 static inline int hwif_to_node(ide_hwif_t *hwif)
1263 struct pci_dev *dev = to_pci_dev(hwif->dev);
1264 return hwif->dev ? pcibus_to_node(dev->bus) : -1;
1267 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1269 ide_hwif_t *hwif = HWIF(drive);
1271 return &hwif->drives[(drive->dn ^ 1) & 1];
1274 static inline void ide_set_irq(ide_drive_t *drive, int on)
1276 drive->hwif->OUTB(drive->ctl | (on ? 0 : 2), IDE_CONTROL_REG);
1279 static inline u8 ide_read_status(ide_drive_t *drive)
1281 ide_hwif_t *hwif = drive->hwif;
1283 return hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
1286 static inline u8 ide_read_altstatus(ide_drive_t *drive)
1288 ide_hwif_t *hwif = drive->hwif;
1290 return hwif->INB(hwif->io_ports[IDE_CONTROL_OFFSET]);
1293 static inline u8 ide_read_error(ide_drive_t *drive)
1295 ide_hwif_t *hwif = drive->hwif;
1297 return hwif->INB(hwif->io_ports[IDE_ERROR_OFFSET]);
1301 * Too bad. The drive wants to send us data which we are not ready to accept.
1302 * Just throw it away.
1304 static inline void ide_atapi_discard_data(ide_drive_t *drive, unsigned bcount)
1306 ide_hwif_t *hwif = drive->hwif;
1308 /* FIXME: use ->atapi_input_bytes */
1310 (void)hwif->INB(hwif->io_ports[IDE_DATA_OFFSET]);
1313 static inline void ide_atapi_write_zeros(ide_drive_t *drive, unsigned bcount)
1315 ide_hwif_t *hwif = drive->hwif;
1317 /* FIXME: use ->atapi_output_bytes */
1319 hwif->OUTB(0, hwif->io_ports[IDE_DATA_OFFSET]);