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/mutex.h>
28 #if defined(CONFIG_CRIS) || defined(CONFIG_FRV)
29 # define SUPPORT_VLB_SYNC 0
31 # define SUPPORT_VLB_SYNC 1
35 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
39 #define IDE_NO_IRQ (-1)
41 typedef unsigned char byte; /* used everywhere */
44 * Probably not wise to fiddle with these
46 #define ERROR_MAX 8 /* Max read/write errors per sector */
47 #define ERROR_RESET 3 /* Reset controller every 4th retry */
48 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
54 #define DMA_PIO_RETRY 1 /* retrying in PIO */
56 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
57 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
60 * Definitions for accessing IDE controller registers
62 #define IDE_NR_PORTS (10)
65 unsigned long data_addr;
68 unsigned long error_addr; /* read: error */
69 unsigned long feature_addr; /* write: feature */
72 unsigned long nsect_addr;
73 unsigned long lbal_addr;
74 unsigned long lbam_addr;
75 unsigned long lbah_addr;
77 unsigned long device_addr;
80 unsigned long status_addr; /* read: status */
81 unsigned long command_addr; /* write: command */
84 unsigned long ctl_addr;
86 unsigned long irq_addr;
89 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
90 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
91 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
92 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
93 #define DRIVE_READY (READY_STAT | SEEK_STAT)
95 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
97 #define SATA_NR_PORTS (3) /* 16 possible ?? */
99 #define SATA_STATUS_OFFSET (0)
100 #define SATA_ERROR_OFFSET (1)
101 #define SATA_CONTROL_OFFSET (2)
104 * Our Physical Region Descriptor (PRD) table should be large enough
105 * to handle the biggest I/O request we are likely to see. Since requests
106 * can have no more than 256 sectors, and since the typical blocksize is
107 * two or more sectors, we could get by with a limit of 128 entries here for
108 * the usual worst case. Most requests seem to include some contiguous blocks,
109 * further reducing the number of table entries required.
111 * The driver reverts to PIO mode for individual requests that exceed
112 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
113 * 100% of all crazy scenarios here is not necessary.
115 * As it turns out though, we must allocate a full 4KB page for this,
116 * so the two PRD tables (ide0 & ide1) will each get half of that,
117 * allowing each to have about 256 entries (8 bytes each) from this.
120 #define PRD_ENTRIES 256
123 * Some more useful definitions
125 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
126 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
127 #define SECTOR_SIZE 512
128 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
129 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
132 * Timeouts for various operations:
134 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
135 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
136 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
137 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
138 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
139 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
142 * Op codes for special requests to be handled by ide_special_rq().
143 * Values should be in the range of 0x20 to 0x3f.
145 #define REQ_DRIVE_RESET 0x20
148 * Check for an interrupt and acknowledge the interrupt status
151 typedef int (ide_ack_intr_t)(struct hwif_s *);
154 * hwif_chipset_t is used to keep track of the specific hardware
155 * chipset used by each IDE interface, if known.
157 enum { ide_unknown, ide_generic, ide_pci,
158 ide_cmd640, ide_dtc2278, ide_ali14xx,
159 ide_qd65xx, ide_umc8672, ide_ht6560b,
160 ide_rz1000, ide_trm290,
161 ide_cmd646, ide_cy82c693, ide_4drives,
163 ide_au1xxx, ide_palm3710
166 typedef u8 hwif_chipset_t;
169 * Structure to hold all information about the location of this port
171 typedef struct hw_regs_s {
173 struct ide_io_ports io_ports;
174 unsigned long io_ports_array[IDE_NR_PORTS];
177 int irq; /* our irq number */
178 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
179 hwif_chipset_t chipset;
180 struct device *dev, *parent;
183 void ide_init_port_data(struct hwif_s *, unsigned int);
184 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
186 static inline void ide_std_init_ports(hw_regs_t *hw,
187 unsigned long io_addr,
188 unsigned long ctl_addr)
192 for (i = 0; i <= 7; i++)
193 hw->io_ports_array[i] = io_addr++;
195 hw->io_ports.ctl_addr = ctl_addr;
198 /* for IDE PCI controllers in legacy mode, temporary */
199 static inline int __ide_default_irq(unsigned long base)
203 case 0x1f0: return isa_irq_to_vector(14);
204 case 0x170: return isa_irq_to_vector(15);
206 case 0x1f0: return 14;
207 case 0x170: return 15;
215 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
217 #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
220 /* Currently only m68k, apus and m8xx need it */
221 #ifndef IDE_ARCH_ACK_INTR
222 # define ide_ack_intr(hwif) (1)
225 /* Currently only Atari needs it */
226 #ifndef IDE_ARCH_LOCK
227 # define ide_release_lock() do {} while (0)
228 # define ide_get_lock(hdlr, data) do {} while (0)
229 #endif /* IDE_ARCH_LOCK */
232 * Now for the data we need to maintain per-drive: ide_drive_t
235 #define ide_scsi 0x21
236 #define ide_disk 0x20
237 #define ide_optical 0x7
238 #define ide_cdrom 0x5
240 #define ide_floppy 0x0
243 * Special Driver Flags
245 * set_geometry : respecify drive geometry
246 * recalibrate : seek to cyl 0
247 * set_multmode : set multmode count
248 * set_tune : tune interface for drive
249 * serviced : service command
255 unsigned set_geometry : 1;
256 unsigned recalibrate : 1;
257 unsigned set_multmode : 1;
258 unsigned set_tune : 1;
259 unsigned serviced : 1;
260 unsigned reserved : 3;
265 * ATA-IDE Select Register, aka Device-Head
267 * head : always zeros here
268 * unit : drive select number: 0/1
270 * lba : using LBA instead of CHS
276 #if defined(__LITTLE_ENDIAN_BITFIELD)
282 #elif defined(__BIG_ENDIAN_BITFIELD)
289 #error "Please fix <asm/byteorder.h>"
292 } select_t, ata_select_t;
295 * Status returned from various ide_ functions
298 ide_stopped, /* no drive operation was started */
299 ide_started, /* a drive operation was started, handler was set */
303 struct ide_settings_s;
305 #ifdef CONFIG_BLK_DEV_IDEACPI
306 struct ide_acpi_drive_link;
307 struct ide_acpi_hwif_link;
310 typedef struct ide_drive_s {
311 char name[4]; /* drive name, such as "hda" */
312 char driver_req[10]; /* requests specific driver */
314 struct request_queue *queue; /* request queue */
316 struct request *rq; /* current request */
317 struct ide_drive_s *next; /* circular list of hwgroup drives */
318 void *driver_data; /* extra driver data */
319 struct hd_driveid *id; /* drive model identification info */
320 #ifdef CONFIG_IDE_PROC_FS
321 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
322 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
324 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
326 unsigned long sleep; /* sleep until this time */
327 unsigned long service_start; /* time we started last request */
328 unsigned long service_time; /* service time of last request */
329 unsigned long timeout; /* max time to wait for irq */
331 special_t special; /* special action flags */
332 select_t select; /* basic drive/head select reg value */
334 u8 keep_settings; /* restore settings after drive reset */
335 u8 using_dma; /* disk is using dma for read/write */
336 u8 retry_pio; /* retrying dma capable host in pio */
337 u8 state; /* retry state */
338 u8 waiting_for_dma; /* dma currently in progress */
339 u8 unmask; /* okay to unmask other irqs */
340 u8 noflush; /* don't attempt flushes */
341 u8 dsc_overlap; /* DSC overlap */
342 u8 nice1; /* give potential excess bandwidth */
344 unsigned present : 1; /* drive is physically present */
345 unsigned dead : 1; /* device ejected hint */
346 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
347 unsigned noprobe : 1; /* from: hdx=noprobe */
348 unsigned removable : 1; /* 1 if need to do check_media_change */
349 unsigned attach : 1; /* needed for removable devices */
350 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
351 unsigned no_unmask : 1; /* disallow setting unmask bit */
352 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
353 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
354 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
355 unsigned nodma : 1; /* disallow DMA */
356 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
357 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
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 ready_stat; /* min status value for drive ready */
373 u8 mult_count; /* current multiple sector setting */
374 u8 mult_req; /* requested multiple sector setting */
375 u8 tune_req; /* requested drive tuning setting */
376 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
377 u8 bad_wstat; /* used for ignoring WRERR_STAT */
378 u8 nowerr; /* used for ignoring WRERR_STAT */
379 u8 sect0; /* offset of first sector for DM6:DDO */
380 u8 head; /* "real" number of heads */
381 u8 sect; /* "real" sectors per track */
382 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
383 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
385 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
386 unsigned int cyl; /* "real" number of cyls */
387 unsigned int drive_data; /* used by set_pio_mode/selectproc */
388 unsigned int failures; /* current failure count */
389 unsigned int max_failures; /* maximum allowed failure count */
390 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
392 u64 capacity64; /* total number of sectors */
394 int lun; /* logical unit */
395 int crc_count; /* crc counter to reduce drive speed */
396 #ifdef CONFIG_BLK_DEV_IDEACPI
397 struct ide_acpi_drive_link *acpidata;
399 struct list_head list;
400 struct device gendev;
401 struct completion gendev_rel_comp; /* to deal with device release() */
404 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
406 #define IDE_CHIPSET_PCI_MASK \
407 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
408 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
410 struct ide_port_info;
412 struct ide_port_ops {
413 /* host specific initialization of a device */
414 void (*init_dev)(ide_drive_t *);
415 /* routine to program host for PIO mode */
416 void (*set_pio_mode)(ide_drive_t *, const u8);
417 /* routine to program host for DMA mode */
418 void (*set_dma_mode)(ide_drive_t *, const u8);
419 /* tweaks hardware to select drive */
420 void (*selectproc)(ide_drive_t *);
421 /* chipset polling based on hba specifics */
422 int (*reset_poll)(ide_drive_t *);
423 /* chipset specific changes to default for device-hba resets */
424 void (*pre_reset)(ide_drive_t *);
425 /* routine to reset controller after a disk reset */
426 void (*resetproc)(ide_drive_t *);
427 /* special host masking for drive selection */
428 void (*maskproc)(ide_drive_t *, int);
429 /* check host's drive quirk list */
430 void (*quirkproc)(ide_drive_t *);
432 u8 (*mdma_filter)(ide_drive_t *);
433 u8 (*udma_filter)(ide_drive_t *);
435 u8 (*cable_detect)(struct hwif_s *);
439 void (*dma_host_set)(struct ide_drive_s *, int);
440 int (*dma_setup)(struct ide_drive_s *);
441 void (*dma_exec_cmd)(struct ide_drive_s *, u8);
442 void (*dma_start)(struct ide_drive_s *);
443 int (*dma_end)(struct ide_drive_s *);
444 int (*dma_test_irq)(struct ide_drive_s *);
445 void (*dma_lost_irq)(struct ide_drive_s *);
446 void (*dma_timeout)(struct ide_drive_s *);
451 typedef struct hwif_s {
452 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
453 struct hwif_s *mate; /* other hwif from same PCI chip */
454 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
455 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
457 char name[6]; /* name of interface, eg. "ide0" */
459 struct ide_io_ports io_ports;
461 unsigned long sata_scr[SATA_NR_PORTS];
463 ide_drive_t drives[MAX_DRIVES]; /* drive info */
465 u8 major; /* our major number */
466 u8 index; /* 0 for ide0; 1 for ide1; ... */
467 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
468 u8 bus_state; /* power state of the IDE bus */
478 u8 cbl; /* cable type */
480 hwif_chipset_t chipset; /* sub-module for tuning.. */
484 ide_ack_intr_t *ack_intr;
486 void (*rw_disk)(ide_drive_t *, struct request *);
488 const struct ide_port_ops *port_ops;
489 const struct ide_dma_ops *dma_ops;
491 void (*exec_command)(struct hwif_s *, u8);
492 u8 (*read_status)(struct hwif_s *);
493 u8 (*read_altstatus)(struct hwif_s *);
494 u8 (*read_sff_dma_status)(struct hwif_s *);
496 void (*set_irq)(struct hwif_s *, int);
498 void (*tf_load)(ide_drive_t *, struct ide_task_s *);
499 void (*tf_read)(ide_drive_t *, struct ide_task_s *);
501 void (*input_data)(ide_drive_t *, struct request *, void *, unsigned);
502 void (*output_data)(ide_drive_t *, struct request *, void *, unsigned);
504 void (*ide_dma_clear_irq)(ide_drive_t *drive);
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 */
529 unsigned long config_data; /* for use by chipset-specific code */
530 unsigned long select_data; /* for use by chipset-specific code */
532 unsigned long extra_base; /* extra addr for dma ports */
533 unsigned extra_ports; /* number of extra dma ports */
535 unsigned present : 1; /* this interface exists */
536 unsigned serialized : 1; /* serialized all channel operation */
537 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
538 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
540 struct device gendev;
541 struct device *portdev;
543 struct completion gendev_rel_comp; /* To deal with device release() */
545 void *hwif_data; /* extra hwif data */
549 #ifdef CONFIG_BLK_DEV_IDEACPI
550 struct ide_acpi_hwif_link *acpidata;
552 } ____cacheline_internodealigned_in_smp ide_hwif_t;
555 * internal ide interrupt handler type
557 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
558 typedef int (ide_expiry_t)(ide_drive_t *);
560 /* used by ide-cd, ide-floppy, etc. */
561 typedef void (xfer_func_t)(ide_drive_t *, struct request *rq, void *, unsigned);
563 typedef struct hwgroup_s {
564 /* irq handler, if active */
565 ide_startstop_t (*handler)(ide_drive_t *);
567 /* BOOL: protects all fields below */
569 /* BOOL: wake us up on timer expiry */
570 unsigned int sleeping : 1;
571 /* BOOL: polling active & poll_timeout field valid */
572 unsigned int polling : 1;
576 /* ptr to current hwif in linked-list */
579 /* current request */
583 struct timer_list timer;
584 /* timeout value during long polls */
585 unsigned long poll_timeout;
586 /* queried upon timeouts */
587 int (*expiry)(ide_drive_t *);
593 typedef struct ide_driver_s ide_driver_t;
595 extern struct mutex ide_setting_mtx;
597 int set_io_32bit(ide_drive_t *, int);
598 int set_pio_mode(ide_drive_t *, int);
599 int set_using_dma(ide_drive_t *, int);
601 /* ATAPI packet command flags */
603 /* set when an error is considered normal - no retry (ide-tape) */
604 PC_FLAG_ABORT = (1 << 0),
605 PC_FLAG_SUPPRESS_ERROR = (1 << 1),
606 PC_FLAG_WAIT_FOR_DSC = (1 << 2),
607 PC_FLAG_DMA_OK = (1 << 3),
608 PC_FLAG_DMA_IN_PROGRESS = (1 << 4),
609 PC_FLAG_DMA_ERROR = (1 << 5),
610 PC_FLAG_WRITING = (1 << 6),
611 /* command timed out */
612 PC_FLAG_TIMEDOUT = (1 << 7),
613 PC_FLAG_ZIP_DRIVE = (1 << 8),
614 PC_FLAG_DRQ_INTERRUPT = (1 << 9),
617 struct ide_atapi_pc {
618 /* actual packet bytes */
620 /* incremented on each retry */
624 /* bytes to transfer */
626 /* bytes actually transferred */
631 /* current buffer position */
634 /* missing/available data on the current buffer */
637 /* the corresponding request */
643 * those are more or less driver-specific and some of them are subject
644 * to change/removal later.
648 void (*callback)(ide_drive_t *);
651 struct idetape_bh *bh;
654 /* idescsi only for now */
655 struct scatterlist *sg;
658 struct scsi_cmnd *scsi_cmd;
659 void (*done) (struct scsi_cmnd *);
661 unsigned long timeout;
664 #ifdef CONFIG_IDE_PROC_FS
666 * configurable drive settings
673 #define SETTING_READ (1 << 0)
674 #define SETTING_WRITE (1 << 1)
675 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
677 typedef int (ide_procset_t)(ide_drive_t *, int);
678 typedef struct ide_settings_s {
689 struct ide_settings_s *next;
692 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
695 * /proc/ide interface
700 read_proc_t *read_proc;
701 write_proc_t *write_proc;
704 void proc_ide_create(void);
705 void proc_ide_destroy(void);
706 void ide_proc_register_port(ide_hwif_t *);
707 void ide_proc_port_register_devices(ide_hwif_t *);
708 void ide_proc_unregister_device(ide_drive_t *);
709 void ide_proc_unregister_port(ide_hwif_t *);
710 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
711 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
713 void ide_add_generic_settings(ide_drive_t *);
715 read_proc_t proc_ide_read_capacity;
716 read_proc_t proc_ide_read_geometry;
719 * Standard exit stuff:
721 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
730 *start = page + off; \
734 static inline void proc_ide_create(void) { ; }
735 static inline void proc_ide_destroy(void) { ; }
736 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
737 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
738 static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
739 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
740 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
741 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
742 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
743 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
747 * Power Management step value (rq->pm->pm_step).
749 * The step value starts at 0 (ide_pm_state_start_suspend) for a
750 * suspend operation or 1000 (ide_pm_state_start_resume) for a
753 * For each step, the core calls the subdriver start_power_step() first.
755 * - ide_stopped : In this case, the core calls us back again unless
756 * step have been set to ide_power_state_completed.
757 * - ide_started : In this case, the channel is left busy until an
758 * async event (interrupt) occurs.
759 * Typically, start_power_step() will issue a taskfile request with
762 * Upon reception of the interrupt, the core will call complete_power_step()
763 * with the error code if any. This routine should update the step value
764 * and return. It should not start a new request. The core will call
765 * start_power_step for the new step value, unless step have been set to
766 * ide_power_state_completed.
768 * Subdrivers are expected to define their own additional power
769 * steps from 1..999 for suspend and from 1001..1999 for resume,
770 * other values are reserved for future use.
774 ide_pm_state_completed = -1,
775 ide_pm_state_start_suspend = 0,
776 ide_pm_state_start_resume = 1000,
780 * Subdrivers support.
782 * The gendriver.owner field should be set to the module owner of this driver.
783 * The gendriver.name field should be set to the name of this driver
785 struct ide_driver_s {
788 unsigned supports_dsc_overlap : 1;
789 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
790 int (*end_request)(ide_drive_t *, int, int);
791 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
792 struct device_driver gen_driver;
793 int (*probe)(ide_drive_t *);
794 void (*remove)(ide_drive_t *);
795 void (*resume)(ide_drive_t *);
796 void (*shutdown)(ide_drive_t *);
797 #ifdef CONFIG_IDE_PROC_FS
798 ide_proc_entry_t *proc;
802 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
804 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
806 extern int ide_vlb_clk;
807 extern int ide_pci_clk;
809 ide_hwif_t *ide_find_port_slot(const struct ide_port_info *);
811 static inline ide_hwif_t *ide_find_port(void)
813 return ide_find_port_slot(NULL);
816 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
817 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
818 int uptodate, int nr_sectors);
820 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
822 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
825 void ide_execute_pkt_cmd(ide_drive_t *);
827 void ide_pad_transfer(ide_drive_t *, int, int);
829 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
831 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
833 extern void ide_fix_driveid(struct hd_driveid *);
835 extern void ide_fixstring(u8 *, const int, const int);
837 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
839 extern ide_startstop_t ide_do_reset (ide_drive_t *);
841 extern void ide_do_drive_cmd(ide_drive_t *, struct request *);
843 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
846 IDE_TFLAG_LBA48 = (1 << 0),
847 IDE_TFLAG_FLAGGED = (1 << 2),
848 IDE_TFLAG_OUT_DATA = (1 << 3),
849 IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
850 IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
851 IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
852 IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
853 IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
854 IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
855 IDE_TFLAG_OUT_HOB_NSECT |
856 IDE_TFLAG_OUT_HOB_LBAL |
857 IDE_TFLAG_OUT_HOB_LBAM |
858 IDE_TFLAG_OUT_HOB_LBAH,
859 IDE_TFLAG_OUT_FEATURE = (1 << 9),
860 IDE_TFLAG_OUT_NSECT = (1 << 10),
861 IDE_TFLAG_OUT_LBAL = (1 << 11),
862 IDE_TFLAG_OUT_LBAM = (1 << 12),
863 IDE_TFLAG_OUT_LBAH = (1 << 13),
864 IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
865 IDE_TFLAG_OUT_NSECT |
869 IDE_TFLAG_OUT_DEVICE = (1 << 14),
870 IDE_TFLAG_WRITE = (1 << 15),
871 IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16),
872 IDE_TFLAG_IN_DATA = (1 << 17),
873 IDE_TFLAG_CUSTOM_HANDLER = (1 << 18),
874 IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19),
875 IDE_TFLAG_IN_HOB_FEATURE = (1 << 20),
876 IDE_TFLAG_IN_HOB_NSECT = (1 << 21),
877 IDE_TFLAG_IN_HOB_LBAL = (1 << 22),
878 IDE_TFLAG_IN_HOB_LBAM = (1 << 23),
879 IDE_TFLAG_IN_HOB_LBAH = (1 << 24),
880 IDE_TFLAG_IN_HOB_LBA = IDE_TFLAG_IN_HOB_LBAL |
881 IDE_TFLAG_IN_HOB_LBAM |
882 IDE_TFLAG_IN_HOB_LBAH,
883 IDE_TFLAG_IN_HOB = IDE_TFLAG_IN_HOB_FEATURE |
884 IDE_TFLAG_IN_HOB_NSECT |
885 IDE_TFLAG_IN_HOB_LBA,
886 IDE_TFLAG_IN_FEATURE = (1 << 1),
887 IDE_TFLAG_IN_NSECT = (1 << 25),
888 IDE_TFLAG_IN_LBAL = (1 << 26),
889 IDE_TFLAG_IN_LBAM = (1 << 27),
890 IDE_TFLAG_IN_LBAH = (1 << 28),
891 IDE_TFLAG_IN_LBA = IDE_TFLAG_IN_LBAL |
894 IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT |
896 IDE_TFLAG_IN_DEVICE = (1 << 29),
897 IDE_TFLAG_HOB = IDE_TFLAG_OUT_HOB |
899 IDE_TFLAG_TF = IDE_TFLAG_OUT_TF |
901 IDE_TFLAG_DEVICE = IDE_TFLAG_OUT_DEVICE |
903 /* force 16-bit I/O operations */
904 IDE_TFLAG_IO_16BIT = (1 << 30),
905 /* ide_task_t was allocated using kmalloc() */
906 IDE_TFLAG_DYN = (1 << 31),
909 struct ide_taskfile {
910 u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
912 u8 hob_feature; /* 1-5: additional data to support LBA48 */
918 u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
921 u8 error; /* read: error */
922 u8 feature; /* write: feature */
925 u8 nsect; /* 8: number of sectors */
926 u8 lbal; /* 9: LBA low */
927 u8 lbam; /* 10: LBA mid */
928 u8 lbah; /* 11: LBA high */
930 u8 device; /* 12: device select */
933 u8 status; /* read: status */
934 u8 command; /* write: command */
938 typedef struct ide_task_s {
940 struct ide_taskfile tf;
945 struct request *rq; /* copy of request */
946 void *special; /* valid_t generally */
949 void ide_tf_dump(const char *, struct ide_taskfile *);
951 extern void SELECT_DRIVE(ide_drive_t *);
952 void SELECT_MASK(ide_drive_t *, int);
954 u8 ide_read_error(ide_drive_t *);
955 void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
957 extern int drive_is_ready(ide_drive_t *);
959 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
961 ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
962 ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
963 void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
964 void (*retry_pc)(ide_drive_t *), void (*dsc_handle)(ide_drive_t *),
965 void (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned int,
967 ide_startstop_t ide_transfer_pc(ide_drive_t *, struct ide_atapi_pc *,
968 ide_handler_t *, unsigned int, ide_expiry_t *);
969 ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_atapi_pc *,
970 ide_handler_t *, unsigned int, ide_expiry_t *);
972 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
974 void task_end_request(ide_drive_t *, struct request *, u8);
976 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
977 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
979 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
980 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
981 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
983 extern int ide_driveid_update(ide_drive_t *);
984 extern int ide_config_drive_speed(ide_drive_t *, u8);
985 extern u8 eighty_ninty_three (ide_drive_t *);
986 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
988 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
990 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
992 extern int ide_spin_wait_hwgroup(ide_drive_t *);
993 extern void ide_timer_expiry(unsigned long);
994 extern irqreturn_t ide_intr(int irq, void *dev_id);
995 extern void do_ide_request(struct request_queue *);
997 void ide_init_disk(struct gendisk *, ide_drive_t *);
999 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1000 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1001 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1003 #define ide_pci_register_driver(d) pci_register_driver(d)
1006 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int,
1007 u8 *, hw_regs_t *, hw_regs_t **);
1008 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1010 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1011 int ide_pci_set_master(struct pci_dev *, const char *);
1012 unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
1013 extern const struct ide_dma_ops sff_dma_ops;
1014 int ide_pci_check_simplex(ide_hwif_t *, const struct ide_port_info *);
1015 int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
1017 static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
1018 const struct ide_port_info *d)
1024 extern void default_hwif_transport(ide_hwif_t *);
1026 typedef struct ide_pci_enablebit_s {
1027 u8 reg; /* byte pci reg holding the enable-bit */
1028 u8 mask; /* mask to isolate the enable-bit */
1029 u8 val; /* value of masked reg when "enabled" */
1030 } ide_pci_enablebit_t;
1033 /* Uses ISA control ports not PCI ones. */
1034 IDE_HFLAG_ISA_PORTS = (1 << 0),
1035 /* single port device */
1036 IDE_HFLAG_SINGLE = (1 << 1),
1037 /* don't use legacy PIO blacklist */
1038 IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
1039 /* set for the second port of QD65xx */
1040 IDE_HFLAG_QD_2ND_PORT = (1 << 3),
1041 /* use PIO8/9 for prefetch off/on */
1042 IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
1043 /* use PIO6/7 for fast-devsel off/on */
1044 IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
1045 /* use 100-102 and 200-202 PIO values to set DMA modes */
1046 IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
1048 * keep DMA setting when programming PIO mode, may be used only
1049 * for hosts which have separate PIO and DMA timings (ie. PMAC)
1051 IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1052 /* program host for the transfer mode after programming device */
1053 IDE_HFLAG_POST_SET_MODE = (1 << 8),
1054 /* don't program host/device for the transfer mode ("smart" hosts) */
1055 IDE_HFLAG_NO_SET_MODE = (1 << 9),
1056 /* trust BIOS for programming chipset/device for DMA */
1057 IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
1058 /* host is CS5510/CS5520 */
1059 IDE_HFLAG_CS5520 = (1 << 11),
1060 /* ATAPI DMA is unsupported */
1061 IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
1062 /* set if host is a "non-bootable" controller */
1063 IDE_HFLAG_NON_BOOTABLE = (1 << 13),
1064 /* host doesn't support DMA */
1065 IDE_HFLAG_NO_DMA = (1 << 14),
1066 /* check if host is PCI IDE device before allowing DMA */
1067 IDE_HFLAG_NO_AUTODMA = (1 << 15),
1068 /* host uses MMIO */
1069 IDE_HFLAG_MMIO = (1 << 16),
1071 IDE_HFLAG_NO_LBA48 = (1 << 17),
1073 IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
1074 /* data FIFO is cleared by an error */
1075 IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
1076 /* serialize ports */
1077 IDE_HFLAG_SERIALIZE = (1 << 20),
1078 /* use legacy IRQs */
1079 IDE_HFLAG_LEGACY_IRQS = (1 << 21),
1080 /* force use of legacy IRQs */
1081 IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
1082 /* limit LBA48 requests to 256 sectors */
1083 IDE_HFLAG_RQSIZE_256 = (1 << 23),
1084 /* use 32-bit I/O ops */
1085 IDE_HFLAG_IO_32BIT = (1 << 24),
1087 IDE_HFLAG_UNMASK_IRQS = (1 << 25),
1088 IDE_HFLAG_ABUSE_SET_DMA_MODE = (1 << 26),
1089 /* serialize ports if DMA is possible (for sl82c105) */
1090 IDE_HFLAG_SERIALIZE_DMA = (1 << 27),
1091 /* force host out of "simplex" mode */
1092 IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
1093 /* DSC overlap is unsupported */
1094 IDE_HFLAG_NO_DSC = (1 << 29),
1095 /* never use 32-bit I/O ops */
1096 IDE_HFLAG_NO_IO_32BIT = (1 << 30),
1097 /* never unmask IRQs */
1098 IDE_HFLAG_NO_UNMASK_IRQS = (1 << 31),
1101 #ifdef CONFIG_BLK_DEV_OFFBOARD
1102 # define IDE_HFLAG_OFF_BOARD 0
1104 # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_NON_BOOTABLE
1107 struct ide_port_info {
1109 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1110 void (*init_iops)(ide_hwif_t *);
1111 void (*init_hwif)(ide_hwif_t *);
1112 int (*init_dma)(ide_hwif_t *,
1113 const struct ide_port_info *);
1115 const struct ide_port_ops *port_ops;
1116 const struct ide_dma_ops *dma_ops;
1118 ide_pci_enablebit_t enablebits[2];
1119 hwif_chipset_t chipset;
1127 int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1128 int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1130 void ide_map_sg(ide_drive_t *, struct request *);
1131 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1133 #define BAD_DMA_DRIVE 0
1134 #define GOOD_DMA_DRIVE 1
1136 struct drive_list_entry {
1137 const char *id_model;
1138 const char *id_firmware;
1141 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1143 #ifdef CONFIG_BLK_DEV_IDEDMA
1144 int __ide_dma_bad_drive(ide_drive_t *);
1145 int ide_id_dma_bug(ide_drive_t *);
1147 u8 ide_find_dma_mode(ide_drive_t *, u8);
1149 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1151 return ide_find_dma_mode(drive, XFER_UDMA_6);
1154 void ide_dma_off_quietly(ide_drive_t *);
1155 void ide_dma_off(ide_drive_t *);
1156 void ide_dma_on(ide_drive_t *);
1157 int ide_set_dma(ide_drive_t *);
1158 void ide_check_dma_crc(ide_drive_t *);
1159 ide_startstop_t ide_dma_intr(ide_drive_t *);
1161 int ide_build_sglist(ide_drive_t *, struct request *);
1162 void ide_destroy_dmatable(ide_drive_t *);
1164 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1165 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1166 int ide_allocate_dma_engine(ide_hwif_t *);
1167 void ide_release_dma_engine(ide_hwif_t *);
1169 void ide_dma_host_set(ide_drive_t *, int);
1170 extern int ide_dma_setup(ide_drive_t *);
1171 void ide_dma_exec_cmd(ide_drive_t *, u8);
1172 extern void ide_dma_start(ide_drive_t *);
1173 extern int __ide_dma_end(ide_drive_t *);
1174 int ide_dma_test_irq(ide_drive_t *);
1175 extern void ide_dma_lost_irq(ide_drive_t *);
1176 extern void ide_dma_timeout(ide_drive_t *);
1177 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1180 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1181 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1182 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1183 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1184 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1185 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1186 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1187 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1188 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1189 #endif /* CONFIG_BLK_DEV_IDEDMA */
1191 #ifndef CONFIG_BLK_DEV_IDEDMA_SFF
1192 static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
1195 #ifdef CONFIG_BLK_DEV_IDEACPI
1196 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1197 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1198 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1199 extern void ide_acpi_init(ide_hwif_t *hwif);
1200 void ide_acpi_port_init_devices(ide_hwif_t *);
1201 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1203 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1204 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1205 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1206 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1207 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1208 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1211 void ide_remove_port_from_hwgroup(ide_hwif_t *);
1212 void ide_unregister(ide_hwif_t *);
1214 void ide_register_region(struct gendisk *);
1215 void ide_unregister_region(struct gendisk *);
1217 void ide_undecoded_slave(ide_drive_t *);
1219 void ide_port_apply_params(ide_hwif_t *);
1221 int ide_device_add_all(u8 *, const struct ide_port_info *, hw_regs_t **);
1222 int ide_device_add(u8 *, const struct ide_port_info *, hw_regs_t **);
1223 int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
1224 void ide_port_unregister_devices(ide_hwif_t *);
1225 void ide_port_scan(ide_hwif_t *);
1227 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1229 return hwif->hwif_data;
1232 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1234 hwif->hwif_data = data;
1237 const char *ide_xfer_verbose(u8 mode);
1238 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1239 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1241 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1243 return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1246 static inline int ide_dev_is_sata(struct hd_driveid *id)
1249 * See if word 93 is 0 AND drive is at least ATA-5 compatible
1250 * verifying that word 80 by casting it to a signed type --
1251 * this trick allows us to filter out the reserved values of
1252 * 0x0000 and 0xffff along with the earlier ATA revisions...
1254 if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1259 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1260 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1265 u16 act8b; /* t2 for 8-bit io */
1266 u16 rec8b; /* t2i for 8-bit io */
1267 u16 cyc8b; /* t0 for 8-bit io */
1268 u16 active; /* t2 or tD */
1269 u16 recover; /* t2i or tK */
1271 u16 udma; /* t2CYCTYP/2 */
1275 IDE_TIMING_SETUP = (1 << 0),
1276 IDE_TIMING_ACT8B = (1 << 1),
1277 IDE_TIMING_REC8B = (1 << 2),
1278 IDE_TIMING_CYC8B = (1 << 3),
1279 IDE_TIMING_8BIT = IDE_TIMING_ACT8B | IDE_TIMING_REC8B |
1281 IDE_TIMING_ACTIVE = (1 << 4),
1282 IDE_TIMING_RECOVER = (1 << 5),
1283 IDE_TIMING_CYCLE = (1 << 6),
1284 IDE_TIMING_UDMA = (1 << 7),
1285 IDE_TIMING_ALL = IDE_TIMING_SETUP | IDE_TIMING_8BIT |
1286 IDE_TIMING_ACTIVE | IDE_TIMING_RECOVER |
1287 IDE_TIMING_CYCLE | IDE_TIMING_UDMA,
1290 struct ide_timing *ide_timing_find_mode(u8);
1291 u16 ide_pio_cycle_time(ide_drive_t *, u8);
1292 void ide_timing_merge(struct ide_timing *, struct ide_timing *,
1293 struct ide_timing *, unsigned int);
1294 int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
1296 int ide_scan_pio_blacklist(char *);
1298 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1300 int ide_set_pio_mode(ide_drive_t *, u8);
1301 int ide_set_dma_mode(ide_drive_t *, u8);
1303 void ide_set_pio(ide_drive_t *, u8);
1305 static inline void ide_set_max_pio(ide_drive_t *drive)
1307 ide_set_pio(drive, 255);
1310 extern spinlock_t ide_lock;
1311 extern struct mutex ide_cfg_mtx;
1313 * Structure locking:
1315 * ide_cfg_mtx and ide_lock together protect changes to
1316 * ide_hwif_t->{next,hwgroup}
1319 * ide_hwgroup_t->busy: ide_lock
1320 * ide_hwgroup_t->hwif: ide_lock
1321 * ide_hwif_t->mate: constant, no locking
1322 * ide_drive_t->hwif: constant, no locking
1325 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1327 extern struct bus_type ide_bus_type;
1328 extern struct class *ide_port_class;
1330 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1331 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1333 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1334 #define ide_id_has_flush_cache_ext(id) \
1335 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1337 static inline void ide_dump_identify(u8 *id)
1339 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1342 static inline int hwif_to_node(ide_hwif_t *hwif)
1344 struct pci_dev *dev = to_pci_dev(hwif->dev);
1345 return hwif->dev ? pcibus_to_node(dev->bus) : -1;
1348 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1350 ide_hwif_t *hwif = HWIF(drive);
1352 return &hwif->drives[(drive->dn ^ 1) & 1];