libata.h 32 KB

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  1. /*
  2. * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
  3. * Copyright 2003-2005 Jeff Garzik
  4. *
  5. *
  6. * This program is free software; you can redistribute it and/or modify
  7. * it under the terms of the GNU General Public License as published by
  8. * the Free Software Foundation; either version 2, or (at your option)
  9. * any later version.
  10. *
  11. * This program is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14. * GNU General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU General Public License
  17. * along with this program; see the file COPYING. If not, write to
  18. * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  19. *
  20. *
  21. * libata documentation is available via 'make {ps|pdf}docs',
  22. * as Documentation/DocBook/libata.*
  23. *
  24. */
  25. #ifndef __LINUX_LIBATA_H__
  26. #define __LINUX_LIBATA_H__
  27. #include <linux/delay.h>
  28. #include <linux/interrupt.h>
  29. #include <linux/pci.h>
  30. #include <linux/dma-mapping.h>
  31. #include <asm/io.h>
  32. #include <linux/ata.h>
  33. #include <linux/workqueue.h>
  34. #include <scsi/scsi_host.h>
  35. /*
  36. * compile-time options: to be removed as soon as all the drivers are
  37. * converted to the new debugging mechanism
  38. */
  39. #undef ATA_DEBUG /* debugging output */
  40. #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
  41. #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
  42. #undef ATA_NDEBUG /* define to disable quick runtime checks */
  43. #undef ATA_ENABLE_PATA /* define to enable PATA support in some
  44. * low-level drivers */
  45. /* note: prints function name for you */
  46. #ifdef ATA_DEBUG
  47. #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
  48. #ifdef ATA_VERBOSE_DEBUG
  49. #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
  50. #else
  51. #define VPRINTK(fmt, args...)
  52. #endif /* ATA_VERBOSE_DEBUG */
  53. #else
  54. #define DPRINTK(fmt, args...)
  55. #define VPRINTK(fmt, args...)
  56. #endif /* ATA_DEBUG */
  57. #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
  58. /* NEW: debug levels */
  59. #define HAVE_LIBATA_MSG 1
  60. enum {
  61. ATA_MSG_DRV = 0x0001,
  62. ATA_MSG_INFO = 0x0002,
  63. ATA_MSG_PROBE = 0x0004,
  64. ATA_MSG_WARN = 0x0008,
  65. ATA_MSG_MALLOC = 0x0010,
  66. ATA_MSG_CTL = 0x0020,
  67. ATA_MSG_INTR = 0x0040,
  68. ATA_MSG_ERR = 0x0080,
  69. };
  70. #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
  71. #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
  72. #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
  73. #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
  74. #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
  75. #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
  76. #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
  77. #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
  78. static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
  79. {
  80. if (dval < 0 || dval >= (sizeof(u32) * 8))
  81. return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
  82. if (!dval)
  83. return 0;
  84. return (1 << dval) - 1;
  85. }
  86. /* defines only for the constants which don't work well as enums */
  87. #define ATA_TAG_POISON 0xfafbfcfdU
  88. /* move to PCI layer? */
  89. static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
  90. {
  91. return &pdev->dev;
  92. }
  93. enum {
  94. /* various global constants */
  95. LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
  96. ATA_MAX_PORTS = 8,
  97. ATA_DEF_QUEUE = 1,
  98. /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
  99. ATA_MAX_QUEUE = 32,
  100. ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
  101. ATA_MAX_SECTORS = 200, /* FIXME */
  102. ATA_MAX_SECTORS_LBA48 = 65535,
  103. ATA_MAX_BUS = 2,
  104. ATA_DEF_BUSY_WAIT = 10000,
  105. ATA_SHORT_PAUSE = (HZ >> 6) + 1,
  106. ATA_SHT_EMULATED = 1,
  107. ATA_SHT_CMD_PER_LUN = 1,
  108. ATA_SHT_THIS_ID = -1,
  109. ATA_SHT_USE_CLUSTERING = 1,
  110. /* struct ata_device stuff */
  111. ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
  112. ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
  113. ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
  114. ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
  115. ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
  116. ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */
  117. ATA_DEV_UNKNOWN = 0, /* unknown device */
  118. ATA_DEV_ATA = 1, /* ATA device */
  119. ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
  120. ATA_DEV_ATAPI = 3, /* ATAPI device */
  121. ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
  122. ATA_DEV_NONE = 5, /* no device */
  123. /* struct ata_port flags */
  124. ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
  125. /* (doesn't imply presence) */
  126. ATA_FLAG_SATA = (1 << 1),
  127. ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
  128. ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
  129. ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
  130. ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
  131. ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
  132. ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
  133. ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
  134. ATA_FLAG_PIO_POLLING = (1 << 10), /* use polling PIO if LLD
  135. * doesn't handle PIO interrupts */
  136. ATA_FLAG_NCQ = (1 << 11), /* host supports NCQ */
  137. ATA_FLAG_DEBUGMSG = (1 << 14),
  138. ATA_FLAG_FLUSH_PORT_TASK = (1 << 15), /* flush port task */
  139. ATA_FLAG_EH_PENDING = (1 << 16), /* EH pending */
  140. ATA_FLAG_FROZEN = (1 << 17), /* port is frozen */
  141. ATA_FLAG_RECOVERED = (1 << 18), /* recovery action performed */
  142. ATA_FLAG_DISABLED = (1 << 22), /* port is disabled, ignore it */
  143. ATA_FLAG_SUSPENDED = (1 << 23), /* port is suspended (power) */
  144. /* bits 24:31 of ap->flags are reserved for LLDD specific flags */
  145. /* struct ata_queued_cmd flags */
  146. ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
  147. ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
  148. ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
  149. ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
  150. ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
  151. ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
  152. ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
  153. ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
  154. ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
  155. /* host set flags */
  156. ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */
  157. /* various lengths of time */
  158. ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
  159. ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
  160. ATA_TMOUT_INTERNAL = 30 * HZ,
  161. ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
  162. /* ATA bus states */
  163. BUS_UNKNOWN = 0,
  164. BUS_DMA = 1,
  165. BUS_IDLE = 2,
  166. BUS_NOINTR = 3,
  167. BUS_NODATA = 4,
  168. BUS_TIMER = 5,
  169. BUS_PIO = 6,
  170. BUS_EDD = 7,
  171. BUS_IDENTIFY = 8,
  172. BUS_PACKET = 9,
  173. /* SATA port states */
  174. PORT_UNKNOWN = 0,
  175. PORT_ENABLED = 1,
  176. PORT_DISABLED = 2,
  177. /* encoding various smaller bitmaps into a single
  178. * unsigned int bitmap
  179. */
  180. ATA_BITS_PIO = 5,
  181. ATA_BITS_MWDMA = 3,
  182. ATA_BITS_UDMA = 8,
  183. ATA_SHIFT_PIO = 0,
  184. ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
  185. ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
  186. ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
  187. ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
  188. ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
  189. /* size of buffer to pad xfers ending on unaligned boundaries */
  190. ATA_DMA_PAD_SZ = 4,
  191. ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
  192. /* masks for port functions */
  193. ATA_PORT_PRIMARY = (1 << 0),
  194. ATA_PORT_SECONDARY = (1 << 1),
  195. /* ering size */
  196. ATA_ERING_SIZE = 32,
  197. /* desc_len for ata_eh_info and context */
  198. ATA_EH_DESC_LEN = 80,
  199. /* reset / recovery action types */
  200. ATA_EH_REVALIDATE = (1 << 0),
  201. ATA_EH_SOFTRESET = (1 << 1),
  202. ATA_EH_HARDRESET = (1 << 2),
  203. ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
  204. /* ata_eh_info->flags */
  205. ATA_EHI_DID_RESET = (1 << 0), /* already reset this port */
  206. /* max repeat if error condition is still set after ->error_handler */
  207. ATA_EH_MAX_REPEAT = 5,
  208. /* how hard are we gonna try to probe/recover devices */
  209. ATA_PROBE_MAX_TRIES = 3,
  210. ATA_EH_RESET_TRIES = 3,
  211. ATA_EH_DEV_TRIES = 3,
  212. };
  213. enum hsm_task_states {
  214. HSM_ST_UNKNOWN, /* state unknown */
  215. HSM_ST_IDLE, /* no command on going */
  216. HSM_ST, /* (waiting the device to) transfer data */
  217. HSM_ST_LAST, /* (waiting the device to) complete command */
  218. HSM_ST_ERR, /* error */
  219. HSM_ST_FIRST, /* (waiting the device to)
  220. write CDB or first data block */
  221. };
  222. enum ata_completion_errors {
  223. AC_ERR_DEV = (1 << 0), /* device reported error */
  224. AC_ERR_HSM = (1 << 1), /* host state machine violation */
  225. AC_ERR_TIMEOUT = (1 << 2), /* timeout */
  226. AC_ERR_MEDIA = (1 << 3), /* media error */
  227. AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
  228. AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
  229. AC_ERR_SYSTEM = (1 << 6), /* system error */
  230. AC_ERR_INVALID = (1 << 7), /* invalid argument */
  231. AC_ERR_OTHER = (1 << 8), /* unknown */
  232. };
  233. /* forward declarations */
  234. struct scsi_device;
  235. struct ata_port_operations;
  236. struct ata_port;
  237. struct ata_queued_cmd;
  238. /* typedefs */
  239. typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
  240. typedef void (*ata_probeinit_fn_t)(struct ata_port *);
  241. typedef int (*ata_reset_fn_t)(struct ata_port *, unsigned int *);
  242. typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *);
  243. struct ata_ioports {
  244. unsigned long cmd_addr;
  245. unsigned long data_addr;
  246. unsigned long error_addr;
  247. unsigned long feature_addr;
  248. unsigned long nsect_addr;
  249. unsigned long lbal_addr;
  250. unsigned long lbam_addr;
  251. unsigned long lbah_addr;
  252. unsigned long device_addr;
  253. unsigned long status_addr;
  254. unsigned long command_addr;
  255. unsigned long altstatus_addr;
  256. unsigned long ctl_addr;
  257. unsigned long bmdma_addr;
  258. unsigned long scr_addr;
  259. };
  260. struct ata_probe_ent {
  261. struct list_head node;
  262. struct device *dev;
  263. const struct ata_port_operations *port_ops;
  264. struct scsi_host_template *sht;
  265. struct ata_ioports port[ATA_MAX_PORTS];
  266. unsigned int n_ports;
  267. unsigned int hard_port_no;
  268. unsigned int pio_mask;
  269. unsigned int mwdma_mask;
  270. unsigned int udma_mask;
  271. unsigned int legacy_mode;
  272. unsigned long irq;
  273. unsigned int irq_flags;
  274. unsigned long host_flags;
  275. unsigned long host_set_flags;
  276. void __iomem *mmio_base;
  277. void *private_data;
  278. };
  279. struct ata_host_set {
  280. spinlock_t lock;
  281. struct device *dev;
  282. unsigned long irq;
  283. void __iomem *mmio_base;
  284. unsigned int n_ports;
  285. void *private_data;
  286. const struct ata_port_operations *ops;
  287. unsigned long flags;
  288. int simplex_claimed; /* Keep seperate in case we
  289. ever need to do this locked */
  290. struct ata_port * ports[0];
  291. };
  292. struct ata_queued_cmd {
  293. struct ata_port *ap;
  294. struct ata_device *dev;
  295. struct scsi_cmnd *scsicmd;
  296. void (*scsidone)(struct scsi_cmnd *);
  297. struct ata_taskfile tf;
  298. u8 cdb[ATAPI_CDB_LEN];
  299. unsigned long flags; /* ATA_QCFLAG_xxx */
  300. unsigned int tag;
  301. unsigned int n_elem;
  302. unsigned int orig_n_elem;
  303. int dma_dir;
  304. unsigned int pad_len;
  305. unsigned int nsect;
  306. unsigned int cursect;
  307. unsigned int nbytes;
  308. unsigned int curbytes;
  309. unsigned int cursg;
  310. unsigned int cursg_ofs;
  311. struct scatterlist sgent;
  312. struct scatterlist pad_sgent;
  313. void *buf_virt;
  314. /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
  315. struct scatterlist *__sg;
  316. unsigned int err_mask;
  317. struct ata_taskfile result_tf;
  318. ata_qc_cb_t complete_fn;
  319. void *private_data;
  320. };
  321. struct ata_host_stats {
  322. unsigned long unhandled_irq;
  323. unsigned long idle_irq;
  324. unsigned long rw_reqbuf;
  325. };
  326. struct ata_ering_entry {
  327. int is_io;
  328. unsigned int err_mask;
  329. u64 timestamp;
  330. };
  331. struct ata_ering {
  332. int cursor;
  333. struct ata_ering_entry ring[ATA_ERING_SIZE];
  334. };
  335. struct ata_device {
  336. struct ata_port *ap;
  337. u64 n_sectors; /* size of device, if ATA */
  338. unsigned long flags; /* ATA_DFLAG_xxx */
  339. unsigned int class; /* ATA_DEV_xxx */
  340. unsigned int devno; /* 0 or 1 */
  341. u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
  342. u8 pio_mode;
  343. u8 dma_mode;
  344. u8 xfer_mode;
  345. unsigned int xfer_shift; /* ATA_SHIFT_xxx */
  346. unsigned int multi_count; /* sectors count for
  347. READ/WRITE MULTIPLE */
  348. unsigned int max_sectors; /* per-device max sectors */
  349. unsigned int cdb_len;
  350. /* per-dev xfer mask */
  351. unsigned int pio_mask;
  352. unsigned int mwdma_mask;
  353. unsigned int udma_mask;
  354. /* for CHS addressing */
  355. u16 cylinders; /* Number of cylinders */
  356. u16 heads; /* Number of heads */
  357. u16 sectors; /* Number of sectors per track */
  358. /* error history */
  359. struct ata_ering ering;
  360. };
  361. struct ata_eh_info {
  362. struct ata_device *dev; /* offending device */
  363. u32 serror; /* SError from LLDD */
  364. unsigned int err_mask; /* port-wide err_mask */
  365. unsigned int action; /* ATA_EH_* action mask */
  366. unsigned int flags; /* ATA_EHI_* flags */
  367. char desc[ATA_EH_DESC_LEN];
  368. int desc_len;
  369. };
  370. struct ata_eh_context {
  371. struct ata_eh_info i;
  372. int tries[ATA_MAX_DEVICES];
  373. };
  374. struct ata_port {
  375. struct Scsi_Host *host; /* our co-allocated scsi host */
  376. const struct ata_port_operations *ops;
  377. unsigned long flags; /* ATA_FLAG_xxx */
  378. unsigned int id; /* unique id req'd by scsi midlyr */
  379. unsigned int port_no; /* unique port #; from zero */
  380. unsigned int hard_port_no; /* hardware port #; from zero */
  381. struct ata_prd *prd; /* our SG list */
  382. dma_addr_t prd_dma; /* and its DMA mapping */
  383. void *pad; /* array of DMA pad buffers */
  384. dma_addr_t pad_dma;
  385. struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
  386. u8 ctl; /* cache of ATA control register */
  387. u8 last_ctl; /* Cache last written value */
  388. unsigned int pio_mask;
  389. unsigned int mwdma_mask;
  390. unsigned int udma_mask;
  391. unsigned int cbl; /* cable type; ATA_CBL_xxx */
  392. unsigned int sata_spd_limit; /* SATA PHY speed limit */
  393. /* record runtime error info, protected by host_set lock */
  394. struct ata_eh_info eh_info;
  395. /* EH context owned by EH */
  396. struct ata_eh_context eh_context;
  397. struct ata_device device[ATA_MAX_DEVICES];
  398. struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
  399. unsigned long qc_allocated;
  400. unsigned int qc_active;
  401. unsigned int active_tag;
  402. u32 sactive;
  403. struct ata_host_stats stats;
  404. struct ata_host_set *host_set;
  405. struct device *dev;
  406. struct work_struct port_task;
  407. unsigned int hsm_task_state;
  408. u32 msg_enable;
  409. struct list_head eh_done_q;
  410. void *private_data;
  411. u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
  412. };
  413. struct ata_port_operations {
  414. void (*port_disable) (struct ata_port *);
  415. void (*dev_config) (struct ata_port *, struct ata_device *);
  416. void (*set_piomode) (struct ata_port *, struct ata_device *);
  417. void (*set_dmamode) (struct ata_port *, struct ata_device *);
  418. unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
  419. void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
  420. void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
  421. void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
  422. u8 (*check_status)(struct ata_port *ap);
  423. u8 (*check_altstatus)(struct ata_port *ap);
  424. void (*dev_select)(struct ata_port *ap, unsigned int device);
  425. void (*phy_reset) (struct ata_port *ap); /* obsolete */
  426. void (*set_mode) (struct ata_port *ap);
  427. int (*probe_reset) (struct ata_port *ap, unsigned int *classes);
  428. void (*post_set_mode) (struct ata_port *ap);
  429. int (*check_atapi_dma) (struct ata_queued_cmd *qc);
  430. void (*bmdma_setup) (struct ata_queued_cmd *qc);
  431. void (*bmdma_start) (struct ata_queued_cmd *qc);
  432. void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
  433. void (*qc_prep) (struct ata_queued_cmd *qc);
  434. unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
  435. /* Error handlers. ->error_handler overrides ->eng_timeout and
  436. * indicates that new-style EH is in place.
  437. */
  438. void (*eng_timeout) (struct ata_port *ap); /* obsolete */
  439. void (*freeze) (struct ata_port *ap);
  440. void (*thaw) (struct ata_port *ap);
  441. void (*error_handler) (struct ata_port *ap);
  442. void (*post_internal_cmd) (struct ata_queued_cmd *qc);
  443. irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
  444. void (*irq_clear) (struct ata_port *);
  445. u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
  446. void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
  447. u32 val);
  448. int (*port_start) (struct ata_port *ap);
  449. void (*port_stop) (struct ata_port *ap);
  450. void (*host_stop) (struct ata_host_set *host_set);
  451. void (*bmdma_stop) (struct ata_queued_cmd *qc);
  452. u8 (*bmdma_status) (struct ata_port *ap);
  453. };
  454. struct ata_port_info {
  455. struct scsi_host_template *sht;
  456. unsigned long host_flags;
  457. unsigned long pio_mask;
  458. unsigned long mwdma_mask;
  459. unsigned long udma_mask;
  460. const struct ata_port_operations *port_ops;
  461. void *private_data;
  462. };
  463. struct ata_timing {
  464. unsigned short mode; /* ATA mode */
  465. unsigned short setup; /* t1 */
  466. unsigned short act8b; /* t2 for 8-bit I/O */
  467. unsigned short rec8b; /* t2i for 8-bit I/O */
  468. unsigned short cyc8b; /* t0 for 8-bit I/O */
  469. unsigned short active; /* t2 or tD */
  470. unsigned short recover; /* t2i or tK */
  471. unsigned short cycle; /* t0 */
  472. unsigned short udma; /* t2CYCTYP/2 */
  473. };
  474. #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
  475. extern void ata_port_probe(struct ata_port *);
  476. extern void __sata_phy_reset(struct ata_port *ap);
  477. extern void sata_phy_reset(struct ata_port *ap);
  478. extern void ata_bus_reset(struct ata_port *ap);
  479. extern int sata_set_spd(struct ata_port *ap);
  480. extern int ata_drive_probe_reset(struct ata_port *ap,
  481. ata_probeinit_fn_t probeinit,
  482. ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
  483. ata_postreset_fn_t postreset, unsigned int *classes);
  484. extern void ata_std_probeinit(struct ata_port *ap);
  485. extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
  486. extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
  487. extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
  488. extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
  489. extern void ata_port_disable(struct ata_port *);
  490. extern void ata_std_ports(struct ata_ioports *ioaddr);
  491. #ifdef CONFIG_PCI
  492. extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
  493. unsigned int n_ports);
  494. extern void ata_pci_remove_one (struct pci_dev *pdev);
  495. extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
  496. extern int ata_pci_device_resume(struct pci_dev *pdev);
  497. extern int ata_pci_clear_simplex(struct pci_dev *pdev);
  498. #endif /* CONFIG_PCI */
  499. extern int ata_device_add(const struct ata_probe_ent *ent);
  500. extern void ata_host_set_remove(struct ata_host_set *host_set);
  501. extern int ata_scsi_detect(struct scsi_host_template *sht);
  502. extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
  503. extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
  504. extern int ata_scsi_release(struct Scsi_Host *host);
  505. extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
  506. extern int sata_scr_valid(struct ata_port *ap);
  507. extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
  508. extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
  509. extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
  510. extern int ata_port_online(struct ata_port *ap);
  511. extern int ata_port_offline(struct ata_port *ap);
  512. extern int ata_scsi_device_resume(struct scsi_device *);
  513. extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state);
  514. extern int ata_device_resume(struct ata_device *);
  515. extern int ata_device_suspend(struct ata_device *, pm_message_t state);
  516. extern int ata_ratelimit(void);
  517. extern unsigned int ata_busy_sleep(struct ata_port *ap,
  518. unsigned long timeout_pat,
  519. unsigned long timeout);
  520. extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
  521. void *data, unsigned long delay);
  522. extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
  523. unsigned long interval_msec,
  524. unsigned long timeout_msec);
  525. /*
  526. * Default driver ops implementations
  527. */
  528. extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
  529. extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
  530. extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
  531. extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
  532. extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
  533. extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
  534. extern u8 ata_check_status(struct ata_port *ap);
  535. extern u8 ata_altstatus(struct ata_port *ap);
  536. extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
  537. extern int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes);
  538. extern int ata_port_start (struct ata_port *ap);
  539. extern void ata_port_stop (struct ata_port *ap);
  540. extern void ata_host_stop (struct ata_host_set *host_set);
  541. extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
  542. extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
  543. unsigned int buflen, int write_data);
  544. extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
  545. unsigned int buflen, int write_data);
  546. extern void ata_qc_prep(struct ata_queued_cmd *qc);
  547. extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
  548. extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
  549. extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
  550. unsigned int buflen);
  551. extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
  552. unsigned int n_elem);
  553. extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
  554. extern void ata_id_string(const u16 *id, unsigned char *s,
  555. unsigned int ofs, unsigned int len);
  556. extern void ata_id_c_string(const u16 *id, unsigned char *s,
  557. unsigned int ofs, unsigned int len);
  558. extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
  559. extern void ata_bmdma_start (struct ata_queued_cmd *qc);
  560. extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
  561. extern u8 ata_bmdma_status(struct ata_port *ap);
  562. extern void ata_bmdma_irq_clear(struct ata_port *ap);
  563. extern void ata_bmdma_freeze(struct ata_port *ap);
  564. extern void ata_bmdma_thaw(struct ata_port *ap);
  565. extern void ata_bmdma_drive_eh(struct ata_port *ap,
  566. ata_reset_fn_t softreset,
  567. ata_reset_fn_t hardreset,
  568. ata_postreset_fn_t postreset);
  569. extern void ata_bmdma_error_handler(struct ata_port *ap);
  570. extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
  571. extern void ata_qc_complete(struct ata_queued_cmd *qc);
  572. extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
  573. void (*finish_qc)(struct ata_queued_cmd *));
  574. extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
  575. void (*done)(struct scsi_cmnd *));
  576. extern int ata_std_bios_param(struct scsi_device *sdev,
  577. struct block_device *bdev,
  578. sector_t capacity, int geom[]);
  579. extern int ata_scsi_slave_config(struct scsi_device *sdev);
  580. extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
  581. int queue_depth);
  582. extern struct ata_device *ata_dev_pair(struct ata_device *adev);
  583. /*
  584. * Timing helpers
  585. */
  586. extern unsigned int ata_pio_need_iordy(const struct ata_device *);
  587. extern int ata_timing_compute(struct ata_device *, unsigned short,
  588. struct ata_timing *, int, int);
  589. extern void ata_timing_merge(const struct ata_timing *,
  590. const struct ata_timing *, struct ata_timing *,
  591. unsigned int);
  592. enum {
  593. ATA_TIMING_SETUP = (1 << 0),
  594. ATA_TIMING_ACT8B = (1 << 1),
  595. ATA_TIMING_REC8B = (1 << 2),
  596. ATA_TIMING_CYC8B = (1 << 3),
  597. ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
  598. ATA_TIMING_CYC8B,
  599. ATA_TIMING_ACTIVE = (1 << 4),
  600. ATA_TIMING_RECOVER = (1 << 5),
  601. ATA_TIMING_CYCLE = (1 << 6),
  602. ATA_TIMING_UDMA = (1 << 7),
  603. ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
  604. ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
  605. ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
  606. ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
  607. };
  608. #ifdef CONFIG_PCI
  609. struct pci_bits {
  610. unsigned int reg; /* PCI config register to read */
  611. unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
  612. unsigned long mask;
  613. unsigned long val;
  614. };
  615. extern void ata_pci_host_stop (struct ata_host_set *host_set);
  616. extern struct ata_probe_ent *
  617. ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
  618. extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
  619. extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
  620. #endif /* CONFIG_PCI */
  621. /*
  622. * EH
  623. */
  624. extern void ata_eng_timeout(struct ata_port *ap);
  625. extern void ata_port_schedule_eh(struct ata_port *ap);
  626. extern int ata_port_abort(struct ata_port *ap);
  627. extern int ata_port_freeze(struct ata_port *ap);
  628. extern void ata_eh_freeze_port(struct ata_port *ap);
  629. extern void ata_eh_thaw_port(struct ata_port *ap);
  630. extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
  631. extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
  632. extern void ata_do_eh(struct ata_port *ap, ata_reset_fn_t softreset,
  633. ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
  634. /*
  635. * printk helpers
  636. */
  637. #define ata_port_printk(ap, lv, fmt, args...) \
  638. printk(lv"ata%u: "fmt, (ap)->id , ##args)
  639. #define ata_dev_printk(dev, lv, fmt, args...) \
  640. printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
  641. /*
  642. * ata_eh_info helpers
  643. */
  644. #define ata_ehi_push_desc(ehi, fmt, args...) do { \
  645. (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
  646. ATA_EH_DESC_LEN - (ehi)->desc_len, \
  647. fmt , ##args); \
  648. } while (0)
  649. #define ata_ehi_clear_desc(ehi) do { \
  650. (ehi)->desc[0] = '\0'; \
  651. (ehi)->desc_len = 0; \
  652. } while (0)
  653. /*
  654. * qc helpers
  655. */
  656. static inline int
  657. ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
  658. {
  659. if (sg == &qc->pad_sgent)
  660. return 1;
  661. if (qc->pad_len)
  662. return 0;
  663. if (((sg - qc->__sg) + 1) == qc->n_elem)
  664. return 1;
  665. return 0;
  666. }
  667. static inline struct scatterlist *
  668. ata_qc_first_sg(struct ata_queued_cmd *qc)
  669. {
  670. if (qc->n_elem)
  671. return qc->__sg;
  672. if (qc->pad_len)
  673. return &qc->pad_sgent;
  674. return NULL;
  675. }
  676. static inline struct scatterlist *
  677. ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
  678. {
  679. if (sg == &qc->pad_sgent)
  680. return NULL;
  681. if (++sg - qc->__sg < qc->n_elem)
  682. return sg;
  683. if (qc->pad_len)
  684. return &qc->pad_sgent;
  685. return NULL;
  686. }
  687. #define ata_for_each_sg(sg, qc) \
  688. for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
  689. static inline unsigned int ata_tag_valid(unsigned int tag)
  690. {
  691. return (tag < ATA_MAX_QUEUE) ? 1 : 0;
  692. }
  693. static inline unsigned int ata_tag_internal(unsigned int tag)
  694. {
  695. return tag == ATA_MAX_QUEUE - 1;
  696. }
  697. static inline unsigned int ata_class_enabled(unsigned int class)
  698. {
  699. return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
  700. }
  701. static inline unsigned int ata_class_disabled(unsigned int class)
  702. {
  703. return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
  704. }
  705. static inline unsigned int ata_class_absent(unsigned int class)
  706. {
  707. return !ata_class_enabled(class) && !ata_class_disabled(class);
  708. }
  709. static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
  710. {
  711. return ata_class_enabled(dev->class);
  712. }
  713. static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
  714. {
  715. return ata_class_disabled(dev->class);
  716. }
  717. static inline unsigned int ata_dev_absent(const struct ata_device *dev)
  718. {
  719. return ata_class_absent(dev->class);
  720. }
  721. static inline u8 ata_chk_status(struct ata_port *ap)
  722. {
  723. return ap->ops->check_status(ap);
  724. }
  725. /**
  726. * ata_pause - Flush writes and pause 400 nanoseconds.
  727. * @ap: Port to wait for.
  728. *
  729. * LOCKING:
  730. * Inherited from caller.
  731. */
  732. static inline void ata_pause(struct ata_port *ap)
  733. {
  734. ata_altstatus(ap);
  735. ndelay(400);
  736. }
  737. /**
  738. * ata_busy_wait - Wait for a port status register
  739. * @ap: Port to wait for.
  740. *
  741. * Waits up to max*10 microseconds for the selected bits in the port's
  742. * status register to be cleared.
  743. * Returns final value of status register.
  744. *
  745. * LOCKING:
  746. * Inherited from caller.
  747. */
  748. static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
  749. unsigned int max)
  750. {
  751. u8 status;
  752. do {
  753. udelay(10);
  754. status = ata_chk_status(ap);
  755. max--;
  756. } while ((status & bits) && (max > 0));
  757. return status;
  758. }
  759. /**
  760. * ata_wait_idle - Wait for a port to be idle.
  761. * @ap: Port to wait for.
  762. *
  763. * Waits up to 10ms for port's BUSY and DRQ signals to clear.
  764. * Returns final value of status register.
  765. *
  766. * LOCKING:
  767. * Inherited from caller.
  768. */
  769. static inline u8 ata_wait_idle(struct ata_port *ap)
  770. {
  771. u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
  772. if (status & (ATA_BUSY | ATA_DRQ)) {
  773. unsigned long l = ap->ioaddr.status_addr;
  774. if (ata_msg_warn(ap))
  775. printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
  776. status, l);
  777. }
  778. return status;
  779. }
  780. static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
  781. {
  782. qc->tf.ctl |= ATA_NIEN;
  783. }
  784. static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
  785. unsigned int tag)
  786. {
  787. if (likely(ata_tag_valid(tag)))
  788. return &ap->qcmd[tag];
  789. return NULL;
  790. }
  791. static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
  792. unsigned int tag)
  793. {
  794. struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
  795. if (unlikely(!qc) || !ap->ops->error_handler)
  796. return qc;
  797. if ((qc->flags & (ATA_QCFLAG_ACTIVE |
  798. ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
  799. return qc;
  800. return NULL;
  801. }
  802. static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
  803. {
  804. memset(tf, 0, sizeof(*tf));
  805. tf->ctl = dev->ap->ctl;
  806. if (dev->devno == 0)
  807. tf->device = ATA_DEVICE_OBS;
  808. else
  809. tf->device = ATA_DEVICE_OBS | ATA_DEV1;
  810. }
  811. static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
  812. {
  813. qc->__sg = NULL;
  814. qc->flags = 0;
  815. qc->cursect = qc->cursg = qc->cursg_ofs = 0;
  816. qc->nsect = 0;
  817. qc->nbytes = qc->curbytes = 0;
  818. qc->err_mask = 0;
  819. ata_tf_init(qc->dev, &qc->tf);
  820. /* init result_tf such that it indicates normal completion */
  821. qc->result_tf.command = ATA_DRDY;
  822. qc->result_tf.feature = 0;
  823. }
  824. /**
  825. * ata_irq_on - Enable interrupts on a port.
  826. * @ap: Port on which interrupts are enabled.
  827. *
  828. * Enable interrupts on a legacy IDE device using MMIO or PIO,
  829. * wait for idle, clear any pending interrupts.
  830. *
  831. * LOCKING:
  832. * Inherited from caller.
  833. */
  834. static inline u8 ata_irq_on(struct ata_port *ap)
  835. {
  836. struct ata_ioports *ioaddr = &ap->ioaddr;
  837. u8 tmp;
  838. ap->ctl &= ~ATA_NIEN;
  839. ap->last_ctl = ap->ctl;
  840. if (ap->flags & ATA_FLAG_MMIO)
  841. writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
  842. else
  843. outb(ap->ctl, ioaddr->ctl_addr);
  844. tmp = ata_wait_idle(ap);
  845. ap->ops->irq_clear(ap);
  846. return tmp;
  847. }
  848. /**
  849. * ata_irq_ack - Acknowledge a device interrupt.
  850. * @ap: Port on which interrupts are enabled.
  851. *
  852. * Wait up to 10 ms for legacy IDE device to become idle (BUSY
  853. * or BUSY+DRQ clear). Obtain dma status and port status from
  854. * device. Clear the interrupt. Return port status.
  855. *
  856. * LOCKING:
  857. */
  858. static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
  859. {
  860. unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
  861. u8 host_stat, post_stat, status;
  862. status = ata_busy_wait(ap, bits, 1000);
  863. if (status & bits)
  864. if (ata_msg_err(ap))
  865. printk(KERN_ERR "abnormal status 0x%X\n", status);
  866. /* get controller status; clear intr, err bits */
  867. if (ap->flags & ATA_FLAG_MMIO) {
  868. void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
  869. host_stat = readb(mmio + ATA_DMA_STATUS);
  870. writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
  871. mmio + ATA_DMA_STATUS);
  872. post_stat = readb(mmio + ATA_DMA_STATUS);
  873. } else {
  874. host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
  875. outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
  876. ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
  877. post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
  878. }
  879. if (ata_msg_intr(ap))
  880. printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
  881. __FUNCTION__,
  882. host_stat, post_stat, status);
  883. return status;
  884. }
  885. static inline int ata_try_flush_cache(const struct ata_device *dev)
  886. {
  887. return ata_id_wcache_enabled(dev->id) ||
  888. ata_id_has_flush(dev->id) ||
  889. ata_id_has_flush_ext(dev->id);
  890. }
  891. static inline unsigned int ac_err_mask(u8 status)
  892. {
  893. if (status & (ATA_BUSY | ATA_DRQ))
  894. return AC_ERR_HSM;
  895. if (status & (ATA_ERR | ATA_DF))
  896. return AC_ERR_DEV;
  897. return 0;
  898. }
  899. static inline unsigned int __ac_err_mask(u8 status)
  900. {
  901. unsigned int mask = ac_err_mask(status);
  902. if (mask == 0)
  903. return AC_ERR_OTHER;
  904. return mask;
  905. }
  906. static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
  907. {
  908. ap->pad_dma = 0;
  909. ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
  910. &ap->pad_dma, GFP_KERNEL);
  911. return (ap->pad == NULL) ? -ENOMEM : 0;
  912. }
  913. static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
  914. {
  915. dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
  916. }
  917. static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
  918. {
  919. return (struct ata_port *) &host->hostdata[0];
  920. }
  921. #endif /* __LINUX_LIBATA_H__ */