ide.h 43 KB

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  1. #ifndef _IDE_H
  2. #define _IDE_H
  3. /*
  4. * linux/include/linux/ide.h
  5. *
  6. * Copyright (C) 1994-2002 Linus Torvalds & authors
  7. */
  8. #include <linux/init.h>
  9. #include <linux/ioport.h>
  10. #include <linux/hdreg.h>
  11. #include <linux/blkdev.h>
  12. #include <linux/proc_fs.h>
  13. #include <linux/interrupt.h>
  14. #include <linux/bitops.h>
  15. #include <linux/bio.h>
  16. #include <linux/device.h>
  17. #include <linux/pci.h>
  18. #include <linux/completion.h>
  19. #ifdef CONFIG_BLK_DEV_IDEACPI
  20. #include <acpi/acpi.h>
  21. #endif
  22. #include <asm/byteorder.h>
  23. #include <asm/system.h>
  24. #include <asm/io.h>
  25. #include <asm/mutex.h>
  26. #if defined(CONFIG_CRIS) || defined(CONFIG_FRV)
  27. # define SUPPORT_VLB_SYNC 0
  28. #else
  29. # define SUPPORT_VLB_SYNC 1
  30. #endif
  31. /*
  32. * Used to indicate "no IRQ", should be a value that cannot be an IRQ
  33. * number.
  34. */
  35. #define IDE_NO_IRQ (-1)
  36. typedef unsigned char byte; /* used everywhere */
  37. /*
  38. * Probably not wise to fiddle with these
  39. */
  40. #define ERROR_MAX 8 /* Max read/write errors per sector */
  41. #define ERROR_RESET 3 /* Reset controller every 4th retry */
  42. #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
  43. /*
  44. * state flags
  45. */
  46. #define DMA_PIO_RETRY 1 /* retrying in PIO */
  47. #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
  48. #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
  49. /*
  50. * Definitions for accessing IDE controller registers
  51. */
  52. #define IDE_NR_PORTS (10)
  53. struct ide_io_ports {
  54. unsigned long data_addr;
  55. union {
  56. unsigned long error_addr; /* read: error */
  57. unsigned long feature_addr; /* write: feature */
  58. };
  59. unsigned long nsect_addr;
  60. unsigned long lbal_addr;
  61. unsigned long lbam_addr;
  62. unsigned long lbah_addr;
  63. unsigned long device_addr;
  64. union {
  65. unsigned long status_addr; /*  read: status  */
  66. unsigned long command_addr; /* write: command */
  67. };
  68. unsigned long ctl_addr;
  69. unsigned long irq_addr;
  70. };
  71. #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
  72. #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
  73. #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
  74. #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
  75. #define DRIVE_READY (READY_STAT | SEEK_STAT)
  76. #define BAD_CRC (ABRT_ERR | ICRC_ERR)
  77. #define SATA_NR_PORTS (3) /* 16 possible ?? */
  78. #define SATA_STATUS_OFFSET (0)
  79. #define SATA_ERROR_OFFSET (1)
  80. #define SATA_CONTROL_OFFSET (2)
  81. /*
  82. * Our Physical Region Descriptor (PRD) table should be large enough
  83. * to handle the biggest I/O request we are likely to see. Since requests
  84. * can have no more than 256 sectors, and since the typical blocksize is
  85. * two or more sectors, we could get by with a limit of 128 entries here for
  86. * the usual worst case. Most requests seem to include some contiguous blocks,
  87. * further reducing the number of table entries required.
  88. *
  89. * The driver reverts to PIO mode for individual requests that exceed
  90. * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
  91. * 100% of all crazy scenarios here is not necessary.
  92. *
  93. * As it turns out though, we must allocate a full 4KB page for this,
  94. * so the two PRD tables (ide0 & ide1) will each get half of that,
  95. * allowing each to have about 256 entries (8 bytes each) from this.
  96. */
  97. #define PRD_BYTES 8
  98. #define PRD_ENTRIES 256
  99. /*
  100. * Some more useful definitions
  101. */
  102. #define PARTN_BITS 6 /* number of minor dev bits for partitions */
  103. #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
  104. #define SECTOR_SIZE 512
  105. #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
  106. #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
  107. /*
  108. * Timeouts for various operations:
  109. */
  110. #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
  111. #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
  112. #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
  113. #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
  114. #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
  115. #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
  116. /*
  117. * Op codes for special requests to be handled by ide_special_rq().
  118. * Values should be in the range of 0x20 to 0x3f.
  119. */
  120. #define REQ_DRIVE_RESET 0x20
  121. /*
  122. * Check for an interrupt and acknowledge the interrupt status
  123. */
  124. struct hwif_s;
  125. typedef int (ide_ack_intr_t)(struct hwif_s *);
  126. /*
  127. * hwif_chipset_t is used to keep track of the specific hardware
  128. * chipset used by each IDE interface, if known.
  129. */
  130. enum { ide_unknown, ide_generic, ide_pci,
  131. ide_cmd640, ide_dtc2278, ide_ali14xx,
  132. ide_qd65xx, ide_umc8672, ide_ht6560b,
  133. ide_rz1000, ide_trm290,
  134. ide_cmd646, ide_cy82c693, ide_4drives,
  135. ide_pmac, ide_acorn,
  136. ide_au1xxx, ide_palm3710
  137. };
  138. typedef u8 hwif_chipset_t;
  139. /*
  140. * Structure to hold all information about the location of this port
  141. */
  142. typedef struct hw_regs_s {
  143. union {
  144. struct ide_io_ports io_ports;
  145. unsigned long io_ports_array[IDE_NR_PORTS];
  146. };
  147. int irq; /* our irq number */
  148. ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
  149. hwif_chipset_t chipset;
  150. struct device *dev, *parent;
  151. unsigned long config;
  152. } hw_regs_t;
  153. void ide_init_port_data(struct hwif_s *, unsigned int);
  154. void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
  155. static inline void ide_std_init_ports(hw_regs_t *hw,
  156. unsigned long io_addr,
  157. unsigned long ctl_addr)
  158. {
  159. unsigned int i;
  160. for (i = 0; i <= 7; i++)
  161. hw->io_ports_array[i] = io_addr++;
  162. hw->io_ports.ctl_addr = ctl_addr;
  163. }
  164. /* for IDE PCI controllers in legacy mode, temporary */
  165. static inline int __ide_default_irq(unsigned long base)
  166. {
  167. switch (base) {
  168. #ifdef CONFIG_IA64
  169. case 0x1f0: return isa_irq_to_vector(14);
  170. case 0x170: return isa_irq_to_vector(15);
  171. #else
  172. case 0x1f0: return 14;
  173. case 0x170: return 15;
  174. #endif
  175. }
  176. return 0;
  177. }
  178. #include <asm/ide.h>
  179. #ifndef MAX_HWIFS
  180. #if defined(CONFIG_BLACKFIN) || defined(CONFIG_H8300) || defined(CONFIG_XTENSA)
  181. # define MAX_HWIFS 1
  182. #else
  183. # define MAX_HWIFS 10
  184. #endif
  185. #endif
  186. #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
  187. #undef MAX_HWIFS
  188. #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
  189. #endif
  190. /* Currently only m68k, apus and m8xx need it */
  191. #ifndef IDE_ARCH_ACK_INTR
  192. # define ide_ack_intr(hwif) (1)
  193. #endif
  194. /* Currently only Atari needs it */
  195. #ifndef IDE_ARCH_LOCK
  196. # define ide_release_lock() do {} while (0)
  197. # define ide_get_lock(hdlr, data) do {} while (0)
  198. #endif /* IDE_ARCH_LOCK */
  199. /*
  200. * Now for the data we need to maintain per-drive: ide_drive_t
  201. */
  202. #define ide_scsi 0x21
  203. #define ide_disk 0x20
  204. #define ide_optical 0x7
  205. #define ide_cdrom 0x5
  206. #define ide_tape 0x1
  207. #define ide_floppy 0x0
  208. /*
  209. * Special Driver Flags
  210. *
  211. * set_geometry : respecify drive geometry
  212. * recalibrate : seek to cyl 0
  213. * set_multmode : set multmode count
  214. * set_tune : tune interface for drive
  215. * serviced : service command
  216. * reserved : unused
  217. */
  218. typedef union {
  219. unsigned all : 8;
  220. struct {
  221. unsigned set_geometry : 1;
  222. unsigned recalibrate : 1;
  223. unsigned set_multmode : 1;
  224. unsigned set_tune : 1;
  225. unsigned serviced : 1;
  226. unsigned reserved : 3;
  227. } b;
  228. } special_t;
  229. /*
  230. * ATA-IDE Select Register, aka Device-Head
  231. *
  232. * head : always zeros here
  233. * unit : drive select number: 0/1
  234. * bit5 : always 1
  235. * lba : using LBA instead of CHS
  236. * bit7 : always 1
  237. */
  238. typedef union {
  239. unsigned all : 8;
  240. struct {
  241. #if defined(__LITTLE_ENDIAN_BITFIELD)
  242. unsigned head : 4;
  243. unsigned unit : 1;
  244. unsigned bit5 : 1;
  245. unsigned lba : 1;
  246. unsigned bit7 : 1;
  247. #elif defined(__BIG_ENDIAN_BITFIELD)
  248. unsigned bit7 : 1;
  249. unsigned lba : 1;
  250. unsigned bit5 : 1;
  251. unsigned unit : 1;
  252. unsigned head : 4;
  253. #else
  254. #error "Please fix <asm/byteorder.h>"
  255. #endif
  256. } b;
  257. } select_t, ata_select_t;
  258. /*
  259. * Status returned from various ide_ functions
  260. */
  261. typedef enum {
  262. ide_stopped, /* no drive operation was started */
  263. ide_started, /* a drive operation was started, handler was set */
  264. } ide_startstop_t;
  265. struct ide_driver_s;
  266. struct ide_settings_s;
  267. #ifdef CONFIG_BLK_DEV_IDEACPI
  268. struct ide_acpi_drive_link;
  269. struct ide_acpi_hwif_link;
  270. #endif
  271. /* ATAPI device flags */
  272. enum {
  273. IDE_AFLAG_DRQ_INTERRUPT = (1 << 0),
  274. IDE_AFLAG_MEDIA_CHANGED = (1 << 1),
  275. /* ide-cd */
  276. /* Drive cannot lock the door. */
  277. IDE_AFLAG_NO_DOORLOCK = (1 << 2),
  278. /* Drive cannot eject the disc. */
  279. IDE_AFLAG_NO_EJECT = (1 << 3),
  280. /* Drive is a pre ATAPI 1.2 drive. */
  281. IDE_AFLAG_PRE_ATAPI12 = (1 << 4),
  282. /* TOC addresses are in BCD. */
  283. IDE_AFLAG_TOCADDR_AS_BCD = (1 << 5),
  284. /* TOC track numbers are in BCD. */
  285. IDE_AFLAG_TOCTRACKS_AS_BCD = (1 << 6),
  286. /*
  287. * Drive does not provide data in multiples of SECTOR_SIZE
  288. * when more than one interrupt is needed.
  289. */
  290. IDE_AFLAG_LIMIT_NFRAMES = (1 << 7),
  291. /* Seeking in progress. */
  292. IDE_AFLAG_SEEKING = (1 << 8),
  293. /* Saved TOC information is current. */
  294. IDE_AFLAG_TOC_VALID = (1 << 9),
  295. /* We think that the drive door is locked. */
  296. IDE_AFLAG_DOOR_LOCKED = (1 << 10),
  297. /* SET_CD_SPEED command is unsupported. */
  298. IDE_AFLAG_NO_SPEED_SELECT = (1 << 11),
  299. IDE_AFLAG_VERTOS_300_SSD = (1 << 12),
  300. IDE_AFLAG_VERTOS_600_ESD = (1 << 13),
  301. IDE_AFLAG_SANYO_3CD = (1 << 14),
  302. IDE_AFLAG_FULL_CAPS_PAGE = (1 << 15),
  303. IDE_AFLAG_PLAY_AUDIO_OK = (1 << 16),
  304. IDE_AFLAG_LE_SPEED_FIELDS = (1 << 17),
  305. /* ide-floppy */
  306. /* Format in progress */
  307. IDE_AFLAG_FORMAT_IN_PROGRESS = (1 << 18),
  308. /* Avoid commands not supported in Clik drive */
  309. IDE_AFLAG_CLIK_DRIVE = (1 << 19),
  310. /* Requires BH algorithm for packets */
  311. IDE_AFLAG_ZIP_DRIVE = (1 << 20),
  312. /* ide-tape */
  313. IDE_AFLAG_IGNORE_DSC = (1 << 21),
  314. /* 0 When the tape position is unknown */
  315. IDE_AFLAG_ADDRESS_VALID = (1 << 22),
  316. /* Device already opened */
  317. IDE_AFLAG_BUSY = (1 << 23),
  318. /* Attempt to auto-detect the current user block size */
  319. IDE_AFLAG_DETECT_BS = (1 << 24),
  320. /* Currently on a filemark */
  321. IDE_AFLAG_FILEMARK = (1 << 25),
  322. /* 0 = no tape is loaded, so we don't rewind after ejecting */
  323. IDE_AFLAG_MEDIUM_PRESENT = (1 << 26)
  324. };
  325. struct ide_drive_s {
  326. char name[4]; /* drive name, such as "hda" */
  327. char driver_req[10]; /* requests specific driver */
  328. struct request_queue *queue; /* request queue */
  329. struct request *rq; /* current request */
  330. struct ide_drive_s *next; /* circular list of hwgroup drives */
  331. void *driver_data; /* extra driver data */
  332. struct hd_driveid *id; /* drive model identification info */
  333. #ifdef CONFIG_IDE_PROC_FS
  334. struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
  335. struct ide_settings_s *settings;/* /proc/ide/ drive settings */
  336. #endif
  337. struct hwif_s *hwif; /* actually (ide_hwif_t *) */
  338. unsigned long sleep; /* sleep until this time */
  339. unsigned long service_start; /* time we started last request */
  340. unsigned long service_time; /* service time of last request */
  341. unsigned long timeout; /* max time to wait for irq */
  342. special_t special; /* special action flags */
  343. select_t select; /* basic drive/head select reg value */
  344. u8 keep_settings; /* restore settings after drive reset */
  345. u8 using_dma; /* disk is using dma for read/write */
  346. u8 retry_pio; /* retrying dma capable host in pio */
  347. u8 state; /* retry state */
  348. u8 waiting_for_dma; /* dma currently in progress */
  349. u8 unmask; /* okay to unmask other irqs */
  350. u8 noflush; /* don't attempt flushes */
  351. u8 dsc_overlap; /* DSC overlap */
  352. u8 nice1; /* give potential excess bandwidth */
  353. unsigned present : 1; /* drive is physically present */
  354. unsigned dead : 1; /* device ejected hint */
  355. unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
  356. unsigned noprobe : 1; /* from: hdx=noprobe */
  357. unsigned removable : 1; /* 1 if need to do check_media_change */
  358. unsigned attach : 1; /* needed for removable devices */
  359. unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
  360. unsigned no_unmask : 1; /* disallow setting unmask bit */
  361. unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
  362. unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
  363. unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
  364. unsigned nodma : 1; /* disallow DMA */
  365. unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
  366. unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
  367. unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
  368. unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
  369. unsigned post_reset : 1;
  370. unsigned udma33_warned : 1;
  371. u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
  372. u8 quirk_list; /* considered quirky, set for a specific host */
  373. u8 init_speed; /* transfer rate set at boot */
  374. u8 current_speed; /* current transfer rate set */
  375. u8 desired_speed; /* desired transfer rate set */
  376. u8 dn; /* now wide spread use */
  377. u8 wcache; /* status of write cache */
  378. u8 acoustic; /* acoustic management */
  379. u8 media; /* disk, cdrom, tape, floppy, ... */
  380. u8 ready_stat; /* min status value for drive ready */
  381. u8 mult_count; /* current multiple sector setting */
  382. u8 mult_req; /* requested multiple sector setting */
  383. u8 tune_req; /* requested drive tuning setting */
  384. u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
  385. u8 bad_wstat; /* used for ignoring WRERR_STAT */
  386. u8 nowerr; /* used for ignoring WRERR_STAT */
  387. u8 sect0; /* offset of first sector for DM6:DDO */
  388. u8 head; /* "real" number of heads */
  389. u8 sect; /* "real" sectors per track */
  390. u8 bios_head; /* BIOS/fdisk/LILO number of heads */
  391. u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
  392. unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
  393. unsigned int cyl; /* "real" number of cyls */
  394. unsigned int drive_data; /* used by set_pio_mode/selectproc */
  395. unsigned int failures; /* current failure count */
  396. unsigned int max_failures; /* maximum allowed failure count */
  397. u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
  398. u64 capacity64; /* total number of sectors */
  399. int lun; /* logical unit */
  400. int crc_count; /* crc counter to reduce drive speed */
  401. #ifdef CONFIG_BLK_DEV_IDEACPI
  402. struct ide_acpi_drive_link *acpidata;
  403. #endif
  404. struct list_head list;
  405. struct device gendev;
  406. struct completion gendev_rel_comp; /* to deal with device release() */
  407. /* callback for packet commands */
  408. void (*pc_callback)(struct ide_drive_s *);
  409. unsigned long atapi_flags;
  410. };
  411. typedef struct ide_drive_s ide_drive_t;
  412. #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
  413. #define IDE_CHIPSET_PCI_MASK \
  414. ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
  415. #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
  416. struct ide_task_s;
  417. struct ide_port_info;
  418. struct ide_tp_ops {
  419. void (*exec_command)(struct hwif_s *, u8);
  420. u8 (*read_status)(struct hwif_s *);
  421. u8 (*read_altstatus)(struct hwif_s *);
  422. u8 (*read_sff_dma_status)(struct hwif_s *);
  423. void (*set_irq)(struct hwif_s *, int);
  424. void (*tf_load)(ide_drive_t *, struct ide_task_s *);
  425. void (*tf_read)(ide_drive_t *, struct ide_task_s *);
  426. void (*input_data)(ide_drive_t *, struct request *, void *,
  427. unsigned int);
  428. void (*output_data)(ide_drive_t *, struct request *, void *,
  429. unsigned int);
  430. };
  431. extern const struct ide_tp_ops default_tp_ops;
  432. struct ide_port_ops {
  433. /* host specific initialization of a device */
  434. void (*init_dev)(ide_drive_t *);
  435. /* routine to program host for PIO mode */
  436. void (*set_pio_mode)(ide_drive_t *, const u8);
  437. /* routine to program host for DMA mode */
  438. void (*set_dma_mode)(ide_drive_t *, const u8);
  439. /* tweaks hardware to select drive */
  440. void (*selectproc)(ide_drive_t *);
  441. /* chipset polling based on hba specifics */
  442. int (*reset_poll)(ide_drive_t *);
  443. /* chipset specific changes to default for device-hba resets */
  444. void (*pre_reset)(ide_drive_t *);
  445. /* routine to reset controller after a disk reset */
  446. void (*resetproc)(ide_drive_t *);
  447. /* special host masking for drive selection */
  448. void (*maskproc)(ide_drive_t *, int);
  449. /* check host's drive quirk list */
  450. void (*quirkproc)(ide_drive_t *);
  451. u8 (*mdma_filter)(ide_drive_t *);
  452. u8 (*udma_filter)(ide_drive_t *);
  453. u8 (*cable_detect)(struct hwif_s *);
  454. };
  455. struct ide_dma_ops {
  456. void (*dma_host_set)(struct ide_drive_s *, int);
  457. int (*dma_setup)(struct ide_drive_s *);
  458. void (*dma_exec_cmd)(struct ide_drive_s *, u8);
  459. void (*dma_start)(struct ide_drive_s *);
  460. int (*dma_end)(struct ide_drive_s *);
  461. int (*dma_test_irq)(struct ide_drive_s *);
  462. void (*dma_lost_irq)(struct ide_drive_s *);
  463. void (*dma_timeout)(struct ide_drive_s *);
  464. };
  465. struct ide_host;
  466. typedef struct hwif_s {
  467. struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
  468. struct hwif_s *mate; /* other hwif from same PCI chip */
  469. struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
  470. struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
  471. struct ide_host *host;
  472. char name[6]; /* name of interface, eg. "ide0" */
  473. struct ide_io_ports io_ports;
  474. unsigned long sata_scr[SATA_NR_PORTS];
  475. ide_drive_t drives[MAX_DRIVES]; /* drive info */
  476. u8 major; /* our major number */
  477. u8 index; /* 0 for ide0; 1 for ide1; ... */
  478. u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
  479. u8 bus_state; /* power state of the IDE bus */
  480. u32 host_flags;
  481. u8 pio_mask;
  482. u8 ultra_mask;
  483. u8 mwdma_mask;
  484. u8 swdma_mask;
  485. u8 cbl; /* cable type */
  486. hwif_chipset_t chipset; /* sub-module for tuning.. */
  487. struct device *dev;
  488. ide_ack_intr_t *ack_intr;
  489. void (*rw_disk)(ide_drive_t *, struct request *);
  490. const struct ide_tp_ops *tp_ops;
  491. const struct ide_port_ops *port_ops;
  492. const struct ide_dma_ops *dma_ops;
  493. void (*ide_dma_clear_irq)(ide_drive_t *drive);
  494. /* dma physical region descriptor table (cpu view) */
  495. unsigned int *dmatable_cpu;
  496. /* dma physical region descriptor table (dma view) */
  497. dma_addr_t dmatable_dma;
  498. /* Scatter-gather list used to build the above */
  499. struct scatterlist *sg_table;
  500. int sg_max_nents; /* Maximum number of entries in it */
  501. int sg_nents; /* Current number of entries in it */
  502. int sg_dma_direction; /* dma transfer direction */
  503. /* data phase of the active command (currently only valid for PIO/DMA) */
  504. int data_phase;
  505. unsigned int nsect;
  506. unsigned int nleft;
  507. struct scatterlist *cursg;
  508. unsigned int cursg_ofs;
  509. int rqsize; /* max sectors per request */
  510. int irq; /* our irq number */
  511. unsigned long dma_base; /* base addr for dma ports */
  512. unsigned long config_data; /* for use by chipset-specific code */
  513. unsigned long select_data; /* for use by chipset-specific code */
  514. unsigned long extra_base; /* extra addr for dma ports */
  515. unsigned extra_ports; /* number of extra dma ports */
  516. unsigned present : 1; /* this interface exists */
  517. unsigned serialized : 1; /* serialized all channel operation */
  518. unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
  519. unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
  520. struct device gendev;
  521. struct device *portdev;
  522. struct completion gendev_rel_comp; /* To deal with device release() */
  523. void *hwif_data; /* extra hwif data */
  524. unsigned dma;
  525. #ifdef CONFIG_BLK_DEV_IDEACPI
  526. struct ide_acpi_hwif_link *acpidata;
  527. #endif
  528. } ____cacheline_internodealigned_in_smp ide_hwif_t;
  529. struct ide_host {
  530. ide_hwif_t *ports[MAX_HWIFS];
  531. unsigned int n_ports;
  532. struct device *dev[2];
  533. unsigned long host_flags;
  534. void *host_priv;
  535. };
  536. /*
  537. * internal ide interrupt handler type
  538. */
  539. typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
  540. typedef int (ide_expiry_t)(ide_drive_t *);
  541. /* used by ide-cd, ide-floppy, etc. */
  542. typedef void (xfer_func_t)(ide_drive_t *, struct request *rq, void *, unsigned);
  543. typedef struct hwgroup_s {
  544. /* irq handler, if active */
  545. ide_startstop_t (*handler)(ide_drive_t *);
  546. /* BOOL: protects all fields below */
  547. volatile int busy;
  548. /* BOOL: wake us up on timer expiry */
  549. unsigned int sleeping : 1;
  550. /* BOOL: polling active & poll_timeout field valid */
  551. unsigned int polling : 1;
  552. /* current drive */
  553. ide_drive_t *drive;
  554. /* ptr to current hwif in linked-list */
  555. ide_hwif_t *hwif;
  556. /* current request */
  557. struct request *rq;
  558. /* failsafe timer */
  559. struct timer_list timer;
  560. /* timeout value during long polls */
  561. unsigned long poll_timeout;
  562. /* queried upon timeouts */
  563. int (*expiry)(ide_drive_t *);
  564. int req_gen;
  565. int req_gen_timer;
  566. } ide_hwgroup_t;
  567. typedef struct ide_driver_s ide_driver_t;
  568. extern struct mutex ide_setting_mtx;
  569. int set_io_32bit(ide_drive_t *, int);
  570. int set_pio_mode(ide_drive_t *, int);
  571. int set_using_dma(ide_drive_t *, int);
  572. /* ATAPI packet command flags */
  573. enum {
  574. /* set when an error is considered normal - no retry (ide-tape) */
  575. PC_FLAG_ABORT = (1 << 0),
  576. PC_FLAG_SUPPRESS_ERROR = (1 << 1),
  577. PC_FLAG_WAIT_FOR_DSC = (1 << 2),
  578. PC_FLAG_DMA_OK = (1 << 3),
  579. PC_FLAG_DMA_IN_PROGRESS = (1 << 4),
  580. PC_FLAG_DMA_ERROR = (1 << 5),
  581. PC_FLAG_WRITING = (1 << 6),
  582. /* command timed out */
  583. PC_FLAG_TIMEDOUT = (1 << 7),
  584. };
  585. struct ide_atapi_pc {
  586. /* actual packet bytes */
  587. u8 c[12];
  588. /* incremented on each retry */
  589. int retries;
  590. int error;
  591. /* bytes to transfer */
  592. int req_xfer;
  593. /* bytes actually transferred */
  594. int xferred;
  595. /* data buffer */
  596. u8 *buf;
  597. /* current buffer position */
  598. u8 *cur_pos;
  599. int buf_size;
  600. /* missing/available data on the current buffer */
  601. int b_count;
  602. /* the corresponding request */
  603. struct request *rq;
  604. unsigned long flags;
  605. /*
  606. * those are more or less driver-specific and some of them are subject
  607. * to change/removal later.
  608. */
  609. u8 pc_buf[256];
  610. /* idetape only */
  611. struct idetape_bh *bh;
  612. char *b_data;
  613. /* idescsi only for now */
  614. struct scatterlist *sg;
  615. unsigned int sg_cnt;
  616. struct scsi_cmnd *scsi_cmd;
  617. void (*done) (struct scsi_cmnd *);
  618. unsigned long timeout;
  619. };
  620. #ifdef CONFIG_IDE_PROC_FS
  621. /*
  622. * configurable drive settings
  623. */
  624. #define TYPE_INT 0
  625. #define TYPE_BYTE 1
  626. #define TYPE_SHORT 2
  627. #define SETTING_READ (1 << 0)
  628. #define SETTING_WRITE (1 << 1)
  629. #define SETTING_RW (SETTING_READ | SETTING_WRITE)
  630. typedef int (ide_procset_t)(ide_drive_t *, int);
  631. typedef struct ide_settings_s {
  632. char *name;
  633. int rw;
  634. int data_type;
  635. int min;
  636. int max;
  637. int mul_factor;
  638. int div_factor;
  639. void *data;
  640. ide_procset_t *set;
  641. int auto_remove;
  642. struct ide_settings_s *next;
  643. } ide_settings_t;
  644. int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
  645. /*
  646. * /proc/ide interface
  647. */
  648. typedef struct {
  649. const char *name;
  650. mode_t mode;
  651. read_proc_t *read_proc;
  652. write_proc_t *write_proc;
  653. } ide_proc_entry_t;
  654. void proc_ide_create(void);
  655. void proc_ide_destroy(void);
  656. void ide_proc_register_port(ide_hwif_t *);
  657. void ide_proc_port_register_devices(ide_hwif_t *);
  658. void ide_proc_unregister_device(ide_drive_t *);
  659. void ide_proc_unregister_port(ide_hwif_t *);
  660. void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
  661. void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
  662. void ide_add_generic_settings(ide_drive_t *);
  663. read_proc_t proc_ide_read_capacity;
  664. read_proc_t proc_ide_read_geometry;
  665. /*
  666. * Standard exit stuff:
  667. */
  668. #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
  669. { \
  670. len -= off; \
  671. if (len < count) { \
  672. *eof = 1; \
  673. if (len <= 0) \
  674. return 0; \
  675. } else \
  676. len = count; \
  677. *start = page + off; \
  678. return len; \
  679. }
  680. #else
  681. static inline void proc_ide_create(void) { ; }
  682. static inline void proc_ide_destroy(void) { ; }
  683. static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
  684. static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
  685. static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
  686. static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
  687. static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
  688. static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
  689. static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
  690. #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
  691. #endif
  692. /*
  693. * Power Management step value (rq->pm->pm_step).
  694. *
  695. * The step value starts at 0 (ide_pm_state_start_suspend) for a
  696. * suspend operation or 1000 (ide_pm_state_start_resume) for a
  697. * resume operation.
  698. *
  699. * For each step, the core calls the subdriver start_power_step() first.
  700. * This can return:
  701. * - ide_stopped : In this case, the core calls us back again unless
  702. * step have been set to ide_power_state_completed.
  703. * - ide_started : In this case, the channel is left busy until an
  704. * async event (interrupt) occurs.
  705. * Typically, start_power_step() will issue a taskfile request with
  706. * do_rw_taskfile().
  707. *
  708. * Upon reception of the interrupt, the core will call complete_power_step()
  709. * with the error code if any. This routine should update the step value
  710. * and return. It should not start a new request. The core will call
  711. * start_power_step for the new step value, unless step have been set to
  712. * ide_power_state_completed.
  713. *
  714. * Subdrivers are expected to define their own additional power
  715. * steps from 1..999 for suspend and from 1001..1999 for resume,
  716. * other values are reserved for future use.
  717. */
  718. enum {
  719. ide_pm_state_completed = -1,
  720. ide_pm_state_start_suspend = 0,
  721. ide_pm_state_start_resume = 1000,
  722. };
  723. /*
  724. * Subdrivers support.
  725. *
  726. * The gendriver.owner field should be set to the module owner of this driver.
  727. * The gendriver.name field should be set to the name of this driver
  728. */
  729. struct ide_driver_s {
  730. const char *version;
  731. u8 media;
  732. unsigned supports_dsc_overlap : 1;
  733. ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
  734. int (*end_request)(ide_drive_t *, int, int);
  735. ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
  736. struct device_driver gen_driver;
  737. int (*probe)(ide_drive_t *);
  738. void (*remove)(ide_drive_t *);
  739. void (*resume)(ide_drive_t *);
  740. void (*shutdown)(ide_drive_t *);
  741. #ifdef CONFIG_IDE_PROC_FS
  742. ide_proc_entry_t *proc;
  743. #endif
  744. };
  745. #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
  746. int ide_device_get(ide_drive_t *);
  747. void ide_device_put(ide_drive_t *);
  748. int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
  749. extern int ide_vlb_clk;
  750. extern int ide_pci_clk;
  751. extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
  752. int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
  753. int uptodate, int nr_sectors);
  754. extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
  755. void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
  756. ide_expiry_t *);
  757. void ide_execute_pkt_cmd(ide_drive_t *);
  758. void ide_pad_transfer(ide_drive_t *, int, int);
  759. ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
  760. ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
  761. extern void ide_fix_driveid(struct hd_driveid *);
  762. extern void ide_fixstring(u8 *, const int, const int);
  763. int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
  764. extern ide_startstop_t ide_do_reset (ide_drive_t *);
  765. extern void ide_do_drive_cmd(ide_drive_t *, struct request *);
  766. extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
  767. enum {
  768. IDE_TFLAG_LBA48 = (1 << 0),
  769. IDE_TFLAG_FLAGGED = (1 << 2),
  770. IDE_TFLAG_OUT_DATA = (1 << 3),
  771. IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4),
  772. IDE_TFLAG_OUT_HOB_NSECT = (1 << 5),
  773. IDE_TFLAG_OUT_HOB_LBAL = (1 << 6),
  774. IDE_TFLAG_OUT_HOB_LBAM = (1 << 7),
  775. IDE_TFLAG_OUT_HOB_LBAH = (1 << 8),
  776. IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE |
  777. IDE_TFLAG_OUT_HOB_NSECT |
  778. IDE_TFLAG_OUT_HOB_LBAL |
  779. IDE_TFLAG_OUT_HOB_LBAM |
  780. IDE_TFLAG_OUT_HOB_LBAH,
  781. IDE_TFLAG_OUT_FEATURE = (1 << 9),
  782. IDE_TFLAG_OUT_NSECT = (1 << 10),
  783. IDE_TFLAG_OUT_LBAL = (1 << 11),
  784. IDE_TFLAG_OUT_LBAM = (1 << 12),
  785. IDE_TFLAG_OUT_LBAH = (1 << 13),
  786. IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE |
  787. IDE_TFLAG_OUT_NSECT |
  788. IDE_TFLAG_OUT_LBAL |
  789. IDE_TFLAG_OUT_LBAM |
  790. IDE_TFLAG_OUT_LBAH,
  791. IDE_TFLAG_OUT_DEVICE = (1 << 14),
  792. IDE_TFLAG_WRITE = (1 << 15),
  793. IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16),
  794. IDE_TFLAG_IN_DATA = (1 << 17),
  795. IDE_TFLAG_CUSTOM_HANDLER = (1 << 18),
  796. IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19),
  797. IDE_TFLAG_IN_HOB_FEATURE = (1 << 20),
  798. IDE_TFLAG_IN_HOB_NSECT = (1 << 21),
  799. IDE_TFLAG_IN_HOB_LBAL = (1 << 22),
  800. IDE_TFLAG_IN_HOB_LBAM = (1 << 23),
  801. IDE_TFLAG_IN_HOB_LBAH = (1 << 24),
  802. IDE_TFLAG_IN_HOB_LBA = IDE_TFLAG_IN_HOB_LBAL |
  803. IDE_TFLAG_IN_HOB_LBAM |
  804. IDE_TFLAG_IN_HOB_LBAH,
  805. IDE_TFLAG_IN_HOB = IDE_TFLAG_IN_HOB_FEATURE |
  806. IDE_TFLAG_IN_HOB_NSECT |
  807. IDE_TFLAG_IN_HOB_LBA,
  808. IDE_TFLAG_IN_FEATURE = (1 << 1),
  809. IDE_TFLAG_IN_NSECT = (1 << 25),
  810. IDE_TFLAG_IN_LBAL = (1 << 26),
  811. IDE_TFLAG_IN_LBAM = (1 << 27),
  812. IDE_TFLAG_IN_LBAH = (1 << 28),
  813. IDE_TFLAG_IN_LBA = IDE_TFLAG_IN_LBAL |
  814. IDE_TFLAG_IN_LBAM |
  815. IDE_TFLAG_IN_LBAH,
  816. IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT |
  817. IDE_TFLAG_IN_LBA,
  818. IDE_TFLAG_IN_DEVICE = (1 << 29),
  819. IDE_TFLAG_HOB = IDE_TFLAG_OUT_HOB |
  820. IDE_TFLAG_IN_HOB,
  821. IDE_TFLAG_TF = IDE_TFLAG_OUT_TF |
  822. IDE_TFLAG_IN_TF,
  823. IDE_TFLAG_DEVICE = IDE_TFLAG_OUT_DEVICE |
  824. IDE_TFLAG_IN_DEVICE,
  825. /* force 16-bit I/O operations */
  826. IDE_TFLAG_IO_16BIT = (1 << 30),
  827. /* ide_task_t was allocated using kmalloc() */
  828. IDE_TFLAG_DYN = (1 << 31),
  829. };
  830. struct ide_taskfile {
  831. u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
  832. u8 hob_feature; /* 1-5: additional data to support LBA48 */
  833. u8 hob_nsect;
  834. u8 hob_lbal;
  835. u8 hob_lbam;
  836. u8 hob_lbah;
  837. u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
  838. union { /*  7: */
  839. u8 error; /* read: error */
  840. u8 feature; /* write: feature */
  841. };
  842. u8 nsect; /* 8: number of sectors */
  843. u8 lbal; /* 9: LBA low */
  844. u8 lbam; /* 10: LBA mid */
  845. u8 lbah; /* 11: LBA high */
  846. u8 device; /* 12: device select */
  847. union { /* 13: */
  848. u8 status; /*  read: status  */
  849. u8 command; /* write: command */
  850. };
  851. };
  852. typedef struct ide_task_s {
  853. union {
  854. struct ide_taskfile tf;
  855. u8 tf_array[14];
  856. };
  857. u32 tf_flags;
  858. int data_phase;
  859. struct request *rq; /* copy of request */
  860. void *special; /* valid_t generally */
  861. } ide_task_t;
  862. void ide_tf_dump(const char *, struct ide_taskfile *);
  863. void ide_exec_command(ide_hwif_t *, u8);
  864. u8 ide_read_status(ide_hwif_t *);
  865. u8 ide_read_altstatus(ide_hwif_t *);
  866. u8 ide_read_sff_dma_status(ide_hwif_t *);
  867. void ide_set_irq(ide_hwif_t *, int);
  868. void ide_tf_load(ide_drive_t *, ide_task_t *);
  869. void ide_tf_read(ide_drive_t *, ide_task_t *);
  870. void ide_input_data(ide_drive_t *, struct request *, void *, unsigned int);
  871. void ide_output_data(ide_drive_t *, struct request *, void *, unsigned int);
  872. extern void SELECT_DRIVE(ide_drive_t *);
  873. void SELECT_MASK(ide_drive_t *, int);
  874. u8 ide_read_error(ide_drive_t *);
  875. void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
  876. extern int drive_is_ready(ide_drive_t *);
  877. void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
  878. ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
  879. ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
  880. void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
  881. void (*retry_pc)(ide_drive_t *), void (*dsc_handle)(ide_drive_t *),
  882. void (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned int,
  883. int));
  884. ide_startstop_t ide_transfer_pc(ide_drive_t *, struct ide_atapi_pc *,
  885. ide_handler_t *, unsigned int, ide_expiry_t *);
  886. ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_atapi_pc *,
  887. ide_handler_t *, unsigned int, ide_expiry_t *);
  888. ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
  889. void task_end_request(ide_drive_t *, struct request *, u8);
  890. int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
  891. int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
  892. int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
  893. int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
  894. int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
  895. extern int ide_driveid_update(ide_drive_t *);
  896. extern int ide_config_drive_speed(ide_drive_t *, u8);
  897. extern u8 eighty_ninty_three (ide_drive_t *);
  898. extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
  899. extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
  900. extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
  901. extern int ide_spin_wait_hwgroup(ide_drive_t *);
  902. extern void ide_timer_expiry(unsigned long);
  903. extern irqreturn_t ide_intr(int irq, void *dev_id);
  904. extern void do_ide_request(struct request_queue *);
  905. void ide_init_disk(struct gendisk *, ide_drive_t *);
  906. #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
  907. extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
  908. #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
  909. #else
  910. #define ide_pci_register_driver(d) pci_register_driver(d)
  911. #endif
  912. void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int,
  913. hw_regs_t *, hw_regs_t **);
  914. void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
  915. #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
  916. int ide_pci_set_master(struct pci_dev *, const char *);
  917. unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
  918. extern const struct ide_dma_ops sff_dma_ops;
  919. int ide_pci_check_simplex(ide_hwif_t *, const struct ide_port_info *);
  920. int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
  921. #else
  922. static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
  923. const struct ide_port_info *d)
  924. {
  925. return -EINVAL;
  926. }
  927. #endif
  928. typedef struct ide_pci_enablebit_s {
  929. u8 reg; /* byte pci reg holding the enable-bit */
  930. u8 mask; /* mask to isolate the enable-bit */
  931. u8 val; /* value of masked reg when "enabled" */
  932. } ide_pci_enablebit_t;
  933. enum {
  934. /* Uses ISA control ports not PCI ones. */
  935. IDE_HFLAG_ISA_PORTS = (1 << 0),
  936. /* single port device */
  937. IDE_HFLAG_SINGLE = (1 << 1),
  938. /* don't use legacy PIO blacklist */
  939. IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
  940. /* set for the second port of QD65xx */
  941. IDE_HFLAG_QD_2ND_PORT = (1 << 3),
  942. /* use PIO8/9 for prefetch off/on */
  943. IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
  944. /* use PIO6/7 for fast-devsel off/on */
  945. IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
  946. /* use 100-102 and 200-202 PIO values to set DMA modes */
  947. IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
  948. /*
  949. * keep DMA setting when programming PIO mode, may be used only
  950. * for hosts which have separate PIO and DMA timings (ie. PMAC)
  951. */
  952. IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
  953. /* program host for the transfer mode after programming device */
  954. IDE_HFLAG_POST_SET_MODE = (1 << 8),
  955. /* don't program host/device for the transfer mode ("smart" hosts) */
  956. IDE_HFLAG_NO_SET_MODE = (1 << 9),
  957. /* trust BIOS for programming chipset/device for DMA */
  958. IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
  959. /* host is CS5510/CS5520 */
  960. IDE_HFLAG_CS5520 = (1 << 11),
  961. /* ATAPI DMA is unsupported */
  962. IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
  963. /* set if host is a "non-bootable" controller */
  964. IDE_HFLAG_NON_BOOTABLE = (1 << 13),
  965. /* host doesn't support DMA */
  966. IDE_HFLAG_NO_DMA = (1 << 14),
  967. /* check if host is PCI IDE device before allowing DMA */
  968. IDE_HFLAG_NO_AUTODMA = (1 << 15),
  969. /* host uses MMIO */
  970. IDE_HFLAG_MMIO = (1 << 16),
  971. /* no LBA48 */
  972. IDE_HFLAG_NO_LBA48 = (1 << 17),
  973. /* no LBA48 DMA */
  974. IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
  975. /* data FIFO is cleared by an error */
  976. IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
  977. /* serialize ports */
  978. IDE_HFLAG_SERIALIZE = (1 << 20),
  979. /* use legacy IRQs */
  980. IDE_HFLAG_LEGACY_IRQS = (1 << 21),
  981. /* force use of legacy IRQs */
  982. IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
  983. /* limit LBA48 requests to 256 sectors */
  984. IDE_HFLAG_RQSIZE_256 = (1 << 23),
  985. /* use 32-bit I/O ops */
  986. IDE_HFLAG_IO_32BIT = (1 << 24),
  987. /* unmask IRQs */
  988. IDE_HFLAG_UNMASK_IRQS = (1 << 25),
  989. /* serialize ports if DMA is possible (for sl82c105) */
  990. IDE_HFLAG_SERIALIZE_DMA = (1 << 27),
  991. /* force host out of "simplex" mode */
  992. IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28),
  993. /* DSC overlap is unsupported */
  994. IDE_HFLAG_NO_DSC = (1 << 29),
  995. /* never use 32-bit I/O ops */
  996. IDE_HFLAG_NO_IO_32BIT = (1 << 30),
  997. /* never unmask IRQs */
  998. IDE_HFLAG_NO_UNMASK_IRQS = (1 << 31),
  999. };
  1000. #ifdef CONFIG_BLK_DEV_OFFBOARD
  1001. # define IDE_HFLAG_OFF_BOARD 0
  1002. #else
  1003. # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_NON_BOOTABLE
  1004. #endif
  1005. struct ide_port_info {
  1006. char *name;
  1007. unsigned int (*init_chipset)(struct pci_dev *, const char *);
  1008. void (*init_iops)(ide_hwif_t *);
  1009. void (*init_hwif)(ide_hwif_t *);
  1010. int (*init_dma)(ide_hwif_t *,
  1011. const struct ide_port_info *);
  1012. const struct ide_tp_ops *tp_ops;
  1013. const struct ide_port_ops *port_ops;
  1014. const struct ide_dma_ops *dma_ops;
  1015. ide_pci_enablebit_t enablebits[2];
  1016. hwif_chipset_t chipset;
  1017. u32 host_flags;
  1018. u8 pio_mask;
  1019. u8 swdma_mask;
  1020. u8 mwdma_mask;
  1021. u8 udma_mask;
  1022. };
  1023. int ide_pci_init_one(struct pci_dev *, const struct ide_port_info *, void *);
  1024. int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
  1025. const struct ide_port_info *, void *);
  1026. void ide_pci_remove(struct pci_dev *);
  1027. void ide_map_sg(ide_drive_t *, struct request *);
  1028. void ide_init_sg_cmd(ide_drive_t *, struct request *);
  1029. #define BAD_DMA_DRIVE 0
  1030. #define GOOD_DMA_DRIVE 1
  1031. struct drive_list_entry {
  1032. const char *id_model;
  1033. const char *id_firmware;
  1034. };
  1035. int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
  1036. #ifdef CONFIG_BLK_DEV_IDEDMA
  1037. int __ide_dma_bad_drive(ide_drive_t *);
  1038. int ide_id_dma_bug(ide_drive_t *);
  1039. u8 ide_find_dma_mode(ide_drive_t *, u8);
  1040. static inline u8 ide_max_dma_mode(ide_drive_t *drive)
  1041. {
  1042. return ide_find_dma_mode(drive, XFER_UDMA_6);
  1043. }
  1044. void ide_dma_off_quietly(ide_drive_t *);
  1045. void ide_dma_off(ide_drive_t *);
  1046. void ide_dma_on(ide_drive_t *);
  1047. int ide_set_dma(ide_drive_t *);
  1048. void ide_check_dma_crc(ide_drive_t *);
  1049. ide_startstop_t ide_dma_intr(ide_drive_t *);
  1050. int ide_build_sglist(ide_drive_t *, struct request *);
  1051. void ide_destroy_dmatable(ide_drive_t *);
  1052. #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
  1053. extern int ide_build_dmatable(ide_drive_t *, struct request *);
  1054. int ide_allocate_dma_engine(ide_hwif_t *);
  1055. void ide_release_dma_engine(ide_hwif_t *);
  1056. void ide_dma_host_set(ide_drive_t *, int);
  1057. extern int ide_dma_setup(ide_drive_t *);
  1058. void ide_dma_exec_cmd(ide_drive_t *, u8);
  1059. extern void ide_dma_start(ide_drive_t *);
  1060. extern int __ide_dma_end(ide_drive_t *);
  1061. int ide_dma_test_irq(ide_drive_t *);
  1062. extern void ide_dma_lost_irq(ide_drive_t *);
  1063. extern void ide_dma_timeout(ide_drive_t *);
  1064. #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
  1065. #else
  1066. static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
  1067. static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
  1068. static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
  1069. static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
  1070. static inline void ide_dma_off(ide_drive_t *drive) { ; }
  1071. static inline void ide_dma_on(ide_drive_t *drive) { ; }
  1072. static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
  1073. static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
  1074. static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
  1075. #endif /* CONFIG_BLK_DEV_IDEDMA */
  1076. #ifndef CONFIG_BLK_DEV_IDEDMA_SFF
  1077. static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
  1078. #endif
  1079. #ifdef CONFIG_BLK_DEV_IDEACPI
  1080. extern int ide_acpi_exec_tfs(ide_drive_t *drive);
  1081. extern void ide_acpi_get_timing(ide_hwif_t *hwif);
  1082. extern void ide_acpi_push_timing(ide_hwif_t *hwif);
  1083. extern void ide_acpi_init(ide_hwif_t *hwif);
  1084. void ide_acpi_port_init_devices(ide_hwif_t *);
  1085. extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
  1086. #else
  1087. static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
  1088. static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
  1089. static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
  1090. static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
  1091. static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
  1092. static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
  1093. #endif
  1094. void ide_remove_port_from_hwgroup(ide_hwif_t *);
  1095. void ide_unregister(ide_hwif_t *);
  1096. void ide_register_region(struct gendisk *);
  1097. void ide_unregister_region(struct gendisk *);
  1098. void ide_undecoded_slave(ide_drive_t *);
  1099. void ide_port_apply_params(ide_hwif_t *);
  1100. struct ide_host *ide_host_alloc_all(const struct ide_port_info *, hw_regs_t **);
  1101. struct ide_host *ide_host_alloc(const struct ide_port_info *, hw_regs_t **);
  1102. void ide_host_free(struct ide_host *);
  1103. int ide_host_register(struct ide_host *, const struct ide_port_info *,
  1104. hw_regs_t **);
  1105. int ide_host_add(const struct ide_port_info *, hw_regs_t **,
  1106. struct ide_host **);
  1107. void ide_host_remove(struct ide_host *);
  1108. int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
  1109. void ide_port_unregister_devices(ide_hwif_t *);
  1110. void ide_port_scan(ide_hwif_t *);
  1111. static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
  1112. {
  1113. return hwif->hwif_data;
  1114. }
  1115. static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
  1116. {
  1117. hwif->hwif_data = data;
  1118. }
  1119. const char *ide_xfer_verbose(u8 mode);
  1120. extern void ide_toggle_bounce(ide_drive_t *drive, int on);
  1121. extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
  1122. static inline int ide_dev_has_iordy(struct hd_driveid *id)
  1123. {
  1124. return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
  1125. }
  1126. static inline int ide_dev_is_sata(struct hd_driveid *id)
  1127. {
  1128. /*
  1129. * See if word 93 is 0 AND drive is at least ATA-5 compatible
  1130. * verifying that word 80 by casting it to a signed type --
  1131. * this trick allows us to filter out the reserved values of
  1132. * 0x0000 and 0xffff along with the earlier ATA revisions...
  1133. */
  1134. if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
  1135. return 1;
  1136. return 0;
  1137. }
  1138. u64 ide_get_lba_addr(struct ide_taskfile *, int);
  1139. u8 ide_dump_status(ide_drive_t *, const char *, u8);
  1140. struct ide_timing {
  1141. u8 mode;
  1142. u8 setup; /* t1 */
  1143. u16 act8b; /* t2 for 8-bit io */
  1144. u16 rec8b; /* t2i for 8-bit io */
  1145. u16 cyc8b; /* t0 for 8-bit io */
  1146. u16 active; /* t2 or tD */
  1147. u16 recover; /* t2i or tK */
  1148. u16 cycle; /* t0 */
  1149. u16 udma; /* t2CYCTYP/2 */
  1150. };
  1151. enum {
  1152. IDE_TIMING_SETUP = (1 << 0),
  1153. IDE_TIMING_ACT8B = (1 << 1),
  1154. IDE_TIMING_REC8B = (1 << 2),
  1155. IDE_TIMING_CYC8B = (1 << 3),
  1156. IDE_TIMING_8BIT = IDE_TIMING_ACT8B | IDE_TIMING_REC8B |
  1157. IDE_TIMING_CYC8B,
  1158. IDE_TIMING_ACTIVE = (1 << 4),
  1159. IDE_TIMING_RECOVER = (1 << 5),
  1160. IDE_TIMING_CYCLE = (1 << 6),
  1161. IDE_TIMING_UDMA = (1 << 7),
  1162. IDE_TIMING_ALL = IDE_TIMING_SETUP | IDE_TIMING_8BIT |
  1163. IDE_TIMING_ACTIVE | IDE_TIMING_RECOVER |
  1164. IDE_TIMING_CYCLE | IDE_TIMING_UDMA,
  1165. };
  1166. struct ide_timing *ide_timing_find_mode(u8);
  1167. u16 ide_pio_cycle_time(ide_drive_t *, u8);
  1168. void ide_timing_merge(struct ide_timing *, struct ide_timing *,
  1169. struct ide_timing *, unsigned int);
  1170. int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
  1171. int ide_scan_pio_blacklist(char *);
  1172. u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
  1173. int ide_set_pio_mode(ide_drive_t *, u8);
  1174. int ide_set_dma_mode(ide_drive_t *, u8);
  1175. void ide_set_pio(ide_drive_t *, u8);
  1176. static inline void ide_set_max_pio(ide_drive_t *drive)
  1177. {
  1178. ide_set_pio(drive, 255);
  1179. }
  1180. extern spinlock_t ide_lock;
  1181. extern struct mutex ide_cfg_mtx;
  1182. /*
  1183. * Structure locking:
  1184. *
  1185. * ide_cfg_mtx and ide_lock together protect changes to
  1186. * ide_hwif_t->{next,hwgroup}
  1187. * ide_drive_t->next
  1188. *
  1189. * ide_hwgroup_t->busy: ide_lock
  1190. * ide_hwgroup_t->hwif: ide_lock
  1191. * ide_hwif_t->mate: constant, no locking
  1192. * ide_drive_t->hwif: constant, no locking
  1193. */
  1194. #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
  1195. extern struct bus_type ide_bus_type;
  1196. extern struct class *ide_port_class;
  1197. /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
  1198. #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
  1199. /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
  1200. #define ide_id_has_flush_cache_ext(id) \
  1201. (((id)->cfs_enable_2 & 0x2400) == 0x2400)
  1202. static inline void ide_dump_identify(u8 *id)
  1203. {
  1204. print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
  1205. }
  1206. static inline int hwif_to_node(ide_hwif_t *hwif)
  1207. {
  1208. struct pci_dev *dev = to_pci_dev(hwif->dev);
  1209. return hwif->dev ? pcibus_to_node(dev->bus) : -1;
  1210. }
  1211. static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
  1212. {
  1213. ide_hwif_t *hwif = HWIF(drive);
  1214. return &hwif->drives[(drive->dn ^ 1) & 1];
  1215. }
  1216. #endif /* _IDE_H */