libata.h 49 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/dma-mapping.h>
  30. #include <linux/scatterlist.h>
  31. #include <linux/io.h>
  32. #include <linux/ata.h>
  33. #include <linux/workqueue.h>
  34. #include <scsi/scsi_host.h>
  35. #include <linux/acpi.h>
  36. #include <linux/cdrom.h>
  37. /*
  38. * Define if arch has non-standard setup. This is a _PCI_ standard
  39. * not a legacy or ISA standard.
  40. */
  41. #ifdef CONFIG_ATA_NONSTANDARD
  42. #include <asm/libata-portmap.h>
  43. #else
  44. #include <asm-generic/libata-portmap.h>
  45. #endif
  46. /*
  47. * compile-time options: to be removed as soon as all the drivers are
  48. * converted to the new debugging mechanism
  49. */
  50. #undef ATA_DEBUG /* debugging output */
  51. #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
  52. #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
  53. #undef ATA_NDEBUG /* define to disable quick runtime checks */
  54. /* note: prints function name for you */
  55. #ifdef ATA_DEBUG
  56. #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
  57. #ifdef ATA_VERBOSE_DEBUG
  58. #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
  59. #else
  60. #define VPRINTK(fmt, args...)
  61. #endif /* ATA_VERBOSE_DEBUG */
  62. #else
  63. #define DPRINTK(fmt, args...)
  64. #define VPRINTK(fmt, args...)
  65. #endif /* ATA_DEBUG */
  66. #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
  67. /* NEW: debug levels */
  68. #define HAVE_LIBATA_MSG 1
  69. enum {
  70. ATA_MSG_DRV = 0x0001,
  71. ATA_MSG_INFO = 0x0002,
  72. ATA_MSG_PROBE = 0x0004,
  73. ATA_MSG_WARN = 0x0008,
  74. ATA_MSG_MALLOC = 0x0010,
  75. ATA_MSG_CTL = 0x0020,
  76. ATA_MSG_INTR = 0x0040,
  77. ATA_MSG_ERR = 0x0080,
  78. };
  79. #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
  80. #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
  81. #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
  82. #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
  83. #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
  84. #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
  85. #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
  86. #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
  87. static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
  88. {
  89. if (dval < 0 || dval >= (sizeof(u32) * 8))
  90. return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
  91. if (!dval)
  92. return 0;
  93. return (1 << dval) - 1;
  94. }
  95. /* defines only for the constants which don't work well as enums */
  96. #define ATA_TAG_POISON 0xfafbfcfdU
  97. enum {
  98. /* various global constants */
  99. LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
  100. LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
  101. ATA_MAX_PORTS = 8,
  102. ATA_DEF_QUEUE = 1,
  103. /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
  104. ATA_MAX_QUEUE = 32,
  105. ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
  106. ATA_MAX_BUS = 2,
  107. ATA_DEF_BUSY_WAIT = 10000,
  108. ATA_SHORT_PAUSE = (HZ >> 6) + 1,
  109. ATAPI_MAX_DRAIN = 16 << 10,
  110. ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
  111. ATA_SHT_EMULATED = 1,
  112. ATA_SHT_CMD_PER_LUN = 1,
  113. ATA_SHT_THIS_ID = -1,
  114. ATA_SHT_USE_CLUSTERING = 1,
  115. /* struct ata_device stuff */
  116. ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
  117. ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
  118. ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
  119. ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
  120. ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
  121. ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
  122. ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
  123. ATA_DFLAG_AN = (1 << 7), /* AN configured */
  124. ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
  125. ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
  126. ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
  127. ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
  128. ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
  129. ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
  130. ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
  131. ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
  132. ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
  133. ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
  134. ATA_DFLAG_DETACH = (1 << 24),
  135. ATA_DFLAG_DETACHED = (1 << 25),
  136. ATA_DEV_UNKNOWN = 0, /* unknown device */
  137. ATA_DEV_ATA = 1, /* ATA device */
  138. ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
  139. ATA_DEV_ATAPI = 3, /* ATAPI device */
  140. ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
  141. ATA_DEV_PMP = 5, /* SATA port multiplier */
  142. ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
  143. ATA_DEV_SEMB = 7, /* SEMB */
  144. ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
  145. ATA_DEV_NONE = 9, /* no device */
  146. /* struct ata_link flags */
  147. ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
  148. ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
  149. ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
  150. ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
  151. ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
  152. ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
  153. /* struct ata_port flags */
  154. ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
  155. /* (doesn't imply presence) */
  156. ATA_FLAG_SATA = (1 << 1),
  157. ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
  158. ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
  159. ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
  160. ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
  161. ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
  162. ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
  163. ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
  164. ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
  165. * doesn't handle PIO interrupts */
  166. ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
  167. ATA_FLAG_DEBUGMSG = (1 << 13),
  168. ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
  169. ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
  170. ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
  171. ATA_FLAG_AN = (1 << 18), /* controller supports AN */
  172. ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
  173. ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
  174. /* The following flag belongs to ap->pflags but is kept in
  175. * ap->flags because it's referenced in many LLDs and will be
  176. * removed in not-too-distant future.
  177. */
  178. ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
  179. /* bits 24:31 of ap->flags are reserved for LLD specific flags */
  180. /* struct ata_port pflags */
  181. ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
  182. ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
  183. ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
  184. ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
  185. ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
  186. ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
  187. ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
  188. ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
  189. ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
  190. ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
  191. ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
  192. ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
  193. /* struct ata_queued_cmd flags */
  194. ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
  195. ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
  196. ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
  197. ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
  198. ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
  199. ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
  200. ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
  201. ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
  202. ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
  203. ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
  204. /* host set flags */
  205. ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
  206. ATA_HOST_STARTED = (1 << 1), /* Host started */
  207. /* bits 24:31 of host->flags are reserved for LLD specific flags */
  208. /* various lengths of time */
  209. ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
  210. ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
  211. ATA_TMOUT_INTERNAL = 30 * HZ,
  212. ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
  213. /* FIXME: GoVault needs 2s but we can't afford that without
  214. * parallel probing. 800ms is enough for iVDR disk
  215. * HHD424020F7SV00. Increase to 2secs when parallel probing
  216. * is in place.
  217. */
  218. ATA_TMOUT_FF_WAIT = 4 * HZ / 5,
  219. /* Spec mandates to wait for ">= 2ms" before checking status
  220. * after reset. We wait 150ms, because that was the magic
  221. * delay used for ATAPI devices in Hale Landis's ATADRVR, for
  222. * the period of time between when the ATA command register is
  223. * written, and then status is checked. Because waiting for
  224. * "a while" before checking status is fine, post SRST, we
  225. * perform this magic delay here as well.
  226. *
  227. * Old drivers/ide uses the 2mS rule and then waits for ready.
  228. */
  229. ATA_WAIT_AFTER_RESET_MSECS = 150,
  230. /* If PMP is supported, we have to do follow-up SRST. As some
  231. * PMPs don't send D2H Reg FIS after hardreset, LLDs are
  232. * advised to wait only for the following duration before
  233. * doing SRST.
  234. */
  235. ATA_TMOUT_PMP_SRST_WAIT = 1 * HZ,
  236. /* ATA bus states */
  237. BUS_UNKNOWN = 0,
  238. BUS_DMA = 1,
  239. BUS_IDLE = 2,
  240. BUS_NOINTR = 3,
  241. BUS_NODATA = 4,
  242. BUS_TIMER = 5,
  243. BUS_PIO = 6,
  244. BUS_EDD = 7,
  245. BUS_IDENTIFY = 8,
  246. BUS_PACKET = 9,
  247. /* SATA port states */
  248. PORT_UNKNOWN = 0,
  249. PORT_ENABLED = 1,
  250. PORT_DISABLED = 2,
  251. /* encoding various smaller bitmaps into a single
  252. * unsigned long bitmap
  253. */
  254. ATA_NR_PIO_MODES = 7,
  255. ATA_NR_MWDMA_MODES = 5,
  256. ATA_NR_UDMA_MODES = 8,
  257. ATA_SHIFT_PIO = 0,
  258. ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
  259. ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
  260. /* size of buffer to pad xfers ending on unaligned boundaries */
  261. ATA_DMA_PAD_SZ = 4,
  262. /* ering size */
  263. ATA_ERING_SIZE = 32,
  264. /* return values for ->qc_defer */
  265. ATA_DEFER_LINK = 1,
  266. ATA_DEFER_PORT = 2,
  267. /* desc_len for ata_eh_info and context */
  268. ATA_EH_DESC_LEN = 80,
  269. /* reset / recovery action types */
  270. ATA_EH_REVALIDATE = (1 << 0),
  271. ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
  272. ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
  273. ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
  274. ATA_EH_ENABLE_LINK = (1 << 3),
  275. ATA_EH_LPM = (1 << 4), /* link power management action */
  276. ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
  277. /* ata_eh_info->flags */
  278. ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
  279. ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
  280. ATA_EHI_QUIET = (1 << 3), /* be quiet */
  281. ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
  282. ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
  283. ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
  284. ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
  285. ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
  286. ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
  287. /* max tries if error condition is still set after ->error_handler */
  288. ATA_EH_MAX_TRIES = 5,
  289. /* how hard are we gonna try to probe/recover devices */
  290. ATA_PROBE_MAX_TRIES = 3,
  291. ATA_EH_DEV_TRIES = 3,
  292. ATA_EH_PMP_TRIES = 5,
  293. ATA_EH_PMP_LINK_TRIES = 3,
  294. SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
  295. /* Horkage types. May be set by libata or controller on drives
  296. (some horkage may be drive/controller pair dependant */
  297. ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
  298. ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
  299. ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
  300. ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
  301. ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
  302. ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */
  303. ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
  304. ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
  305. ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
  306. ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
  307. /* DMA mask for user DMA control: User visible values; DO NOT
  308. renumber */
  309. ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
  310. ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
  311. ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
  312. /* ATAPI command types */
  313. ATAPI_READ = 0, /* READs */
  314. ATAPI_WRITE = 1, /* WRITEs */
  315. ATAPI_READ_CD = 2, /* READ CD [MSF] */
  316. ATAPI_PASS_THRU = 3, /* SAT pass-thru */
  317. ATAPI_MISC = 4, /* the rest */
  318. /* Timing constants */
  319. ATA_TIMING_SETUP = (1 << 0),
  320. ATA_TIMING_ACT8B = (1 << 1),
  321. ATA_TIMING_REC8B = (1 << 2),
  322. ATA_TIMING_CYC8B = (1 << 3),
  323. ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
  324. ATA_TIMING_CYC8B,
  325. ATA_TIMING_ACTIVE = (1 << 4),
  326. ATA_TIMING_RECOVER = (1 << 5),
  327. ATA_TIMING_CYCLE = (1 << 6),
  328. ATA_TIMING_UDMA = (1 << 7),
  329. ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
  330. ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
  331. ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
  332. ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
  333. };
  334. enum ata_xfer_mask {
  335. ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
  336. << ATA_SHIFT_PIO,
  337. ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
  338. << ATA_SHIFT_MWDMA,
  339. ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
  340. << ATA_SHIFT_UDMA,
  341. };
  342. enum hsm_task_states {
  343. HSM_ST_IDLE, /* no command on going */
  344. HSM_ST_FIRST, /* (waiting the device to)
  345. write CDB or first data block */
  346. HSM_ST, /* (waiting the device to) transfer data */
  347. HSM_ST_LAST, /* (waiting the device to) complete command */
  348. HSM_ST_ERR, /* error */
  349. };
  350. enum ata_completion_errors {
  351. AC_ERR_DEV = (1 << 0), /* device reported error */
  352. AC_ERR_HSM = (1 << 1), /* host state machine violation */
  353. AC_ERR_TIMEOUT = (1 << 2), /* timeout */
  354. AC_ERR_MEDIA = (1 << 3), /* media error */
  355. AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
  356. AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
  357. AC_ERR_SYSTEM = (1 << 6), /* system error */
  358. AC_ERR_INVALID = (1 << 7), /* invalid argument */
  359. AC_ERR_OTHER = (1 << 8), /* unknown */
  360. AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
  361. AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
  362. };
  363. /* forward declarations */
  364. struct scsi_device;
  365. struct ata_port_operations;
  366. struct ata_port;
  367. struct ata_link;
  368. struct ata_queued_cmd;
  369. /* typedefs */
  370. typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
  371. typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
  372. typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
  373. unsigned long deadline);
  374. typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
  375. /*
  376. * host pm policy: If you alter this, you also need to alter libata-scsi.c
  377. * (for the ascii descriptions)
  378. */
  379. enum link_pm {
  380. NOT_AVAILABLE,
  381. MIN_POWER,
  382. MAX_PERFORMANCE,
  383. MEDIUM_POWER,
  384. };
  385. extern struct device_attribute dev_attr_link_power_management_policy;
  386. #ifdef CONFIG_ATA_SFF
  387. struct ata_ioports {
  388. void __iomem *cmd_addr;
  389. void __iomem *data_addr;
  390. void __iomem *error_addr;
  391. void __iomem *feature_addr;
  392. void __iomem *nsect_addr;
  393. void __iomem *lbal_addr;
  394. void __iomem *lbam_addr;
  395. void __iomem *lbah_addr;
  396. void __iomem *device_addr;
  397. void __iomem *status_addr;
  398. void __iomem *command_addr;
  399. void __iomem *altstatus_addr;
  400. void __iomem *ctl_addr;
  401. void __iomem *bmdma_addr;
  402. void __iomem *scr_addr;
  403. };
  404. #endif /* CONFIG_ATA_SFF */
  405. struct ata_host {
  406. spinlock_t lock;
  407. struct device *dev;
  408. void __iomem * const *iomap;
  409. unsigned int n_ports;
  410. void *private_data;
  411. struct ata_port_operations *ops;
  412. unsigned long flags;
  413. #ifdef CONFIG_ATA_ACPI
  414. acpi_handle acpi_handle;
  415. #endif
  416. struct ata_port *simplex_claimed; /* channel owning the DMA */
  417. struct ata_port *ports[0];
  418. };
  419. struct ata_queued_cmd {
  420. struct ata_port *ap;
  421. struct ata_device *dev;
  422. struct scsi_cmnd *scsicmd;
  423. void (*scsidone)(struct scsi_cmnd *);
  424. struct ata_taskfile tf;
  425. u8 cdb[ATAPI_CDB_LEN];
  426. unsigned long flags; /* ATA_QCFLAG_xxx */
  427. unsigned int tag;
  428. unsigned int n_elem;
  429. int dma_dir;
  430. unsigned int sect_size;
  431. unsigned int nbytes;
  432. unsigned int extrabytes;
  433. unsigned int curbytes;
  434. struct scatterlist *cursg;
  435. unsigned int cursg_ofs;
  436. struct scatterlist sgent;
  437. struct scatterlist *sg;
  438. unsigned int err_mask;
  439. struct ata_taskfile result_tf;
  440. ata_qc_cb_t complete_fn;
  441. void *private_data;
  442. void *lldd_task;
  443. };
  444. struct ata_port_stats {
  445. unsigned long unhandled_irq;
  446. unsigned long idle_irq;
  447. unsigned long rw_reqbuf;
  448. };
  449. struct ata_ering_entry {
  450. unsigned int eflags;
  451. unsigned int err_mask;
  452. u64 timestamp;
  453. };
  454. struct ata_ering {
  455. int cursor;
  456. struct ata_ering_entry ring[ATA_ERING_SIZE];
  457. };
  458. struct ata_device {
  459. struct ata_link *link;
  460. unsigned int devno; /* 0 or 1 */
  461. unsigned long flags; /* ATA_DFLAG_xxx */
  462. unsigned int horkage; /* List of broken features */
  463. struct scsi_device *sdev; /* attached SCSI device */
  464. #ifdef CONFIG_ATA_ACPI
  465. acpi_handle acpi_handle;
  466. union acpi_object *gtf_cache;
  467. #endif
  468. /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
  469. u64 n_sectors; /* size of device, if ATA */
  470. unsigned int class; /* ATA_DEV_xxx */
  471. u8 pio_mode;
  472. u8 dma_mode;
  473. u8 xfer_mode;
  474. unsigned int xfer_shift; /* ATA_SHIFT_xxx */
  475. unsigned int multi_count; /* sectors count for
  476. READ/WRITE MULTIPLE */
  477. unsigned int max_sectors; /* per-device max sectors */
  478. unsigned int cdb_len;
  479. /* per-dev xfer mask */
  480. unsigned long pio_mask;
  481. unsigned long mwdma_mask;
  482. unsigned long udma_mask;
  483. /* for CHS addressing */
  484. u16 cylinders; /* Number of cylinders */
  485. u16 heads; /* Number of heads */
  486. u16 sectors; /* Number of sectors per track */
  487. /* error history */
  488. int spdn_cnt;
  489. struct ata_ering ering;
  490. union {
  491. u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
  492. u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
  493. };
  494. };
  495. /* Offset into struct ata_device. Fields above it are maintained
  496. * acress device init. Fields below are zeroed.
  497. */
  498. #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
  499. struct ata_eh_info {
  500. struct ata_device *dev; /* offending device */
  501. u32 serror; /* SError from LLDD */
  502. unsigned int err_mask; /* port-wide err_mask */
  503. unsigned int action; /* ATA_EH_* action mask */
  504. unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
  505. unsigned int flags; /* ATA_EHI_* flags */
  506. unsigned int probe_mask;
  507. char desc[ATA_EH_DESC_LEN];
  508. int desc_len;
  509. };
  510. struct ata_eh_context {
  511. struct ata_eh_info i;
  512. int tries[ATA_MAX_DEVICES];
  513. unsigned int classes[ATA_MAX_DEVICES];
  514. unsigned int did_probe_mask;
  515. unsigned int saved_ncq_enabled;
  516. u8 saved_xfer_mode[ATA_MAX_DEVICES];
  517. };
  518. struct ata_acpi_drive
  519. {
  520. u32 pio;
  521. u32 dma;
  522. } __packed;
  523. struct ata_acpi_gtm {
  524. struct ata_acpi_drive drive[2];
  525. u32 flags;
  526. } __packed;
  527. struct ata_link {
  528. struct ata_port *ap;
  529. int pmp; /* port multiplier port # */
  530. unsigned int active_tag; /* active tag on this link */
  531. u32 sactive; /* active NCQ commands */
  532. unsigned int flags; /* ATA_LFLAG_xxx */
  533. unsigned int hw_sata_spd_limit;
  534. unsigned int sata_spd_limit;
  535. unsigned int sata_spd; /* current SATA PHY speed */
  536. /* record runtime error info, protected by host_set lock */
  537. struct ata_eh_info eh_info;
  538. /* EH context */
  539. struct ata_eh_context eh_context;
  540. struct ata_device device[ATA_MAX_DEVICES];
  541. };
  542. struct ata_port {
  543. struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
  544. struct ata_port_operations *ops;
  545. spinlock_t *lock;
  546. unsigned long flags; /* ATA_FLAG_xxx */
  547. unsigned int pflags; /* ATA_PFLAG_xxx */
  548. unsigned int print_id; /* user visible unique port ID */
  549. unsigned int port_no; /* 0 based port no. inside the host */
  550. struct ata_prd *prd; /* our SG list */
  551. dma_addr_t prd_dma; /* and its DMA mapping */
  552. #ifdef CONFIG_ATA_SFF
  553. struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
  554. #endif /* CONFIG_ATA_SFF */
  555. u8 ctl; /* cache of ATA control register */
  556. u8 last_ctl; /* Cache last written value */
  557. unsigned int pio_mask;
  558. unsigned int mwdma_mask;
  559. unsigned int udma_mask;
  560. unsigned int cbl; /* cable type; ATA_CBL_xxx */
  561. struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
  562. unsigned long qc_allocated;
  563. unsigned int qc_active;
  564. int nr_active_links; /* #links with active qcs */
  565. struct ata_link link; /* host default link */
  566. int nr_pmp_links; /* nr of available PMP links */
  567. struct ata_link *pmp_link; /* array of PMP links */
  568. struct ata_link *excl_link; /* for PMP qc exclusion */
  569. struct ata_port_stats stats;
  570. struct ata_host *host;
  571. struct device *dev;
  572. void *port_task_data;
  573. struct delayed_work port_task;
  574. struct delayed_work hotplug_task;
  575. struct work_struct scsi_rescan_task;
  576. unsigned int hsm_task_state;
  577. u32 msg_enable;
  578. struct list_head eh_done_q;
  579. wait_queue_head_t eh_wait_q;
  580. int eh_tries;
  581. pm_message_t pm_mesg;
  582. int *pm_result;
  583. enum link_pm pm_policy;
  584. struct timer_list fastdrain_timer;
  585. unsigned long fastdrain_cnt;
  586. void *private_data;
  587. #ifdef CONFIG_ATA_ACPI
  588. acpi_handle acpi_handle;
  589. struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
  590. #endif
  591. u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
  592. };
  593. /* The following initializer overrides a method to NULL whether one of
  594. * its parent has the method defined or not. This is equivalent to
  595. * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
  596. * expression and thus can't be used as an initializer.
  597. */
  598. #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
  599. struct ata_port_operations {
  600. /*
  601. * Command execution
  602. */
  603. int (*qc_defer)(struct ata_queued_cmd *qc);
  604. int (*check_atapi_dma)(struct ata_queued_cmd *qc);
  605. void (*qc_prep)(struct ata_queued_cmd *qc);
  606. unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
  607. bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
  608. /*
  609. * Configuration and exception handling
  610. */
  611. int (*cable_detect)(struct ata_port *ap);
  612. unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
  613. void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
  614. void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
  615. int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
  616. void (*dev_config)(struct ata_device *dev);
  617. void (*freeze)(struct ata_port *ap);
  618. void (*thaw)(struct ata_port *ap);
  619. ata_prereset_fn_t prereset;
  620. ata_reset_fn_t softreset;
  621. ata_reset_fn_t hardreset;
  622. ata_postreset_fn_t postreset;
  623. ata_prereset_fn_t pmp_prereset;
  624. ata_reset_fn_t pmp_softreset;
  625. ata_reset_fn_t pmp_hardreset;
  626. ata_postreset_fn_t pmp_postreset;
  627. void (*error_handler)(struct ata_port *ap);
  628. void (*post_internal_cmd)(struct ata_queued_cmd *qc);
  629. /*
  630. * Optional features
  631. */
  632. int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val);
  633. int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val);
  634. void (*pmp_attach)(struct ata_port *ap);
  635. void (*pmp_detach)(struct ata_port *ap);
  636. int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
  637. void (*disable_pm)(struct ata_port *ap);
  638. /*
  639. * Start, stop, suspend and resume
  640. */
  641. int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
  642. int (*port_resume)(struct ata_port *ap);
  643. int (*port_start)(struct ata_port *ap);
  644. void (*port_stop)(struct ata_port *ap);
  645. void (*host_stop)(struct ata_host *host);
  646. #ifdef CONFIG_ATA_SFF
  647. /*
  648. * SFF / taskfile oriented ops
  649. */
  650. void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
  651. u8 (*sff_check_status)(struct ata_port *ap);
  652. u8 (*sff_check_altstatus)(struct ata_port *ap);
  653. void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
  654. void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
  655. void (*sff_exec_command)(struct ata_port *ap,
  656. const struct ata_taskfile *tf);
  657. unsigned int (*sff_data_xfer)(struct ata_device *dev,
  658. unsigned char *buf, unsigned int buflen, int rw);
  659. u8 (*sff_irq_on)(struct ata_port *);
  660. void (*sff_irq_clear)(struct ata_port *);
  661. void (*bmdma_setup)(struct ata_queued_cmd *qc);
  662. void (*bmdma_start)(struct ata_queued_cmd *qc);
  663. void (*bmdma_stop)(struct ata_queued_cmd *qc);
  664. u8 (*bmdma_status)(struct ata_port *ap);
  665. #endif /* CONFIG_ATA_SFF */
  666. /*
  667. * Obsolete
  668. */
  669. void (*phy_reset)(struct ata_port *ap);
  670. void (*eng_timeout)(struct ata_port *ap);
  671. /*
  672. * ->inherits must be the last field and all the preceding
  673. * fields must be pointers.
  674. */
  675. const struct ata_port_operations *inherits;
  676. };
  677. struct ata_port_info {
  678. unsigned long flags;
  679. unsigned long link_flags;
  680. unsigned long pio_mask;
  681. unsigned long mwdma_mask;
  682. unsigned long udma_mask;
  683. struct ata_port_operations *port_ops;
  684. void *private_data;
  685. };
  686. struct ata_timing {
  687. unsigned short mode; /* ATA mode */
  688. unsigned short setup; /* t1 */
  689. unsigned short act8b; /* t2 for 8-bit I/O */
  690. unsigned short rec8b; /* t2i for 8-bit I/O */
  691. unsigned short cyc8b; /* t0 for 8-bit I/O */
  692. unsigned short active; /* t2 or tD */
  693. unsigned short recover; /* t2i or tK */
  694. unsigned short cycle; /* t0 */
  695. unsigned short udma; /* t2CYCTYP/2 */
  696. };
  697. /*
  698. * Core layer - drivers/ata/libata-core.c
  699. */
  700. extern const unsigned long sata_deb_timing_normal[];
  701. extern const unsigned long sata_deb_timing_hotplug[];
  702. extern const unsigned long sata_deb_timing_long[];
  703. extern struct ata_port_operations ata_dummy_port_ops;
  704. extern const struct ata_port_info ata_dummy_port_info;
  705. static inline const unsigned long *
  706. sata_ehc_deb_timing(struct ata_eh_context *ehc)
  707. {
  708. if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
  709. return sata_deb_timing_hotplug;
  710. else
  711. return sata_deb_timing_normal;
  712. }
  713. static inline int ata_port_is_dummy(struct ata_port *ap)
  714. {
  715. return ap->ops == &ata_dummy_port_ops;
  716. }
  717. extern void ata_port_probe(struct ata_port *);
  718. extern int sata_set_spd(struct ata_link *link);
  719. extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
  720. extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
  721. int (*check_ready)(struct ata_link *link));
  722. extern int sata_link_debounce(struct ata_link *link,
  723. const unsigned long *params, unsigned long deadline);
  724. extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
  725. unsigned long deadline);
  726. extern int sata_link_hardreset(struct ata_link *link,
  727. const unsigned long *timing, unsigned long deadline,
  728. bool *online, int (*check_ready)(struct ata_link *));
  729. extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
  730. unsigned long deadline);
  731. extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
  732. extern void ata_port_disable(struct ata_port *);
  733. extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
  734. extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
  735. const struct ata_port_info * const * ppi, int n_ports);
  736. extern int ata_host_start(struct ata_host *host);
  737. extern int ata_host_register(struct ata_host *host,
  738. struct scsi_host_template *sht);
  739. extern int ata_host_activate(struct ata_host *host, int irq,
  740. irq_handler_t irq_handler, unsigned long irq_flags,
  741. struct scsi_host_template *sht);
  742. extern void ata_host_detach(struct ata_host *host);
  743. extern void ata_host_init(struct ata_host *, struct device *,
  744. unsigned long, struct ata_port_operations *);
  745. extern int ata_scsi_detect(struct scsi_host_template *sht);
  746. extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
  747. extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
  748. extern void ata_sas_port_destroy(struct ata_port *);
  749. extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
  750. struct ata_port_info *, struct Scsi_Host *);
  751. extern int ata_sas_port_init(struct ata_port *);
  752. extern int ata_sas_port_start(struct ata_port *ap);
  753. extern void ata_sas_port_stop(struct ata_port *ap);
  754. extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
  755. extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
  756. struct ata_port *ap);
  757. extern int sata_scr_valid(struct ata_link *link);
  758. extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
  759. extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
  760. extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
  761. extern int ata_link_online(struct ata_link *link);
  762. extern int ata_link_offline(struct ata_link *link);
  763. #ifdef CONFIG_PM
  764. extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
  765. extern void ata_host_resume(struct ata_host *host);
  766. #endif
  767. extern int ata_ratelimit(void);
  768. extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
  769. unsigned long interval_msec,
  770. unsigned long timeout_msec);
  771. extern int atapi_cmd_type(u8 opcode);
  772. extern void ata_tf_to_fis(const struct ata_taskfile *tf,
  773. u8 pmp, int is_cmd, u8 *fis);
  774. extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
  775. extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
  776. unsigned long mwdma_mask, unsigned long udma_mask);
  777. extern void ata_unpack_xfermask(unsigned long xfer_mask,
  778. unsigned long *pio_mask, unsigned long *mwdma_mask,
  779. unsigned long *udma_mask);
  780. extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
  781. extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
  782. extern int ata_xfer_mode2shift(unsigned long xfer_mode);
  783. extern const char *ata_mode_string(unsigned long xfer_mask);
  784. extern unsigned long ata_id_xfermask(const u16 *id);
  785. extern int ata_port_start(struct ata_port *ap);
  786. extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
  787. extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
  788. extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
  789. unsigned int n_elem);
  790. extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
  791. extern void ata_dev_disable(struct ata_device *adev);
  792. extern void ata_id_string(const u16 *id, unsigned char *s,
  793. unsigned int ofs, unsigned int len);
  794. extern void ata_id_c_string(const u16 *id, unsigned char *s,
  795. unsigned int ofs, unsigned int len);
  796. extern void ata_qc_complete(struct ata_queued_cmd *qc);
  797. extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
  798. extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
  799. void (*done)(struct scsi_cmnd *));
  800. extern int ata_std_bios_param(struct scsi_device *sdev,
  801. struct block_device *bdev,
  802. sector_t capacity, int geom[]);
  803. extern int ata_scsi_slave_config(struct scsi_device *sdev);
  804. extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
  805. extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
  806. int queue_depth);
  807. extern struct ata_device *ata_dev_pair(struct ata_device *adev);
  808. extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
  809. extern int ata_cable_40wire(struct ata_port *ap);
  810. extern int ata_cable_80wire(struct ata_port *ap);
  811. extern int ata_cable_sata(struct ata_port *ap);
  812. extern int ata_cable_ignore(struct ata_port *ap);
  813. extern int ata_cable_unknown(struct ata_port *ap);
  814. /* Timing helpers */
  815. extern unsigned int ata_pio_need_iordy(const struct ata_device *);
  816. extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
  817. extern int ata_timing_compute(struct ata_device *, unsigned short,
  818. struct ata_timing *, int, int);
  819. extern void ata_timing_merge(const struct ata_timing *,
  820. const struct ata_timing *, struct ata_timing *,
  821. unsigned int);
  822. extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
  823. /* PCI */
  824. #ifdef CONFIG_PCI
  825. struct pci_dev;
  826. struct pci_bits {
  827. unsigned int reg; /* PCI config register to read */
  828. unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
  829. unsigned long mask;
  830. unsigned long val;
  831. };
  832. extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
  833. extern void ata_pci_remove_one(struct pci_dev *pdev);
  834. #ifdef CONFIG_PM
  835. extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
  836. extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
  837. extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
  838. extern int ata_pci_device_resume(struct pci_dev *pdev);
  839. #endif /* CONFIG_PM */
  840. #endif /* CONFIG_PCI */
  841. /*
  842. * ACPI - drivers/ata/libata-acpi.c
  843. */
  844. #ifdef CONFIG_ATA_ACPI
  845. static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
  846. {
  847. if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
  848. return &ap->__acpi_init_gtm;
  849. return NULL;
  850. }
  851. int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
  852. int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
  853. unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
  854. const struct ata_acpi_gtm *gtm);
  855. int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
  856. #else
  857. static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
  858. {
  859. return NULL;
  860. }
  861. static inline int ata_acpi_stm(const struct ata_port *ap,
  862. struct ata_acpi_gtm *stm)
  863. {
  864. return -ENOSYS;
  865. }
  866. static inline int ata_acpi_gtm(const struct ata_port *ap,
  867. struct ata_acpi_gtm *stm)
  868. {
  869. return -ENOSYS;
  870. }
  871. static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
  872. const struct ata_acpi_gtm *gtm)
  873. {
  874. return 0;
  875. }
  876. static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
  877. const struct ata_acpi_gtm *gtm)
  878. {
  879. return 0;
  880. }
  881. #endif
  882. /*
  883. * EH - drivers/ata/libata-eh.c
  884. */
  885. extern void ata_port_schedule_eh(struct ata_port *ap);
  886. extern int ata_link_abort(struct ata_link *link);
  887. extern int ata_port_abort(struct ata_port *ap);
  888. extern int ata_port_freeze(struct ata_port *ap);
  889. extern int sata_async_notification(struct ata_port *ap);
  890. extern void ata_eh_freeze_port(struct ata_port *ap);
  891. extern void ata_eh_thaw_port(struct ata_port *ap);
  892. extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
  893. extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
  894. extern void ata_eh_analyze_ncq_error(struct ata_link *link);
  895. extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
  896. ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
  897. ata_postreset_fn_t postreset);
  898. extern void ata_std_error_handler(struct ata_port *ap);
  899. /*
  900. * Base operations to inherit from and initializers for sht
  901. *
  902. * Operations
  903. *
  904. * base : Common to all libata drivers.
  905. * sata : SATA controllers w/ native interface.
  906. * pmp : SATA controllers w/ PMP support.
  907. * sff : SFF ATA controllers w/o BMDMA support.
  908. * bmdma : SFF ATA controllers w/ BMDMA support.
  909. *
  910. * sht initializers
  911. *
  912. * BASE : Common to all libata drivers. The user must set
  913. * sg_tablesize and dma_boundary.
  914. * PIO : SFF ATA controllers w/ only PIO support.
  915. * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
  916. * dma_boundary are set to BMDMA limits.
  917. * NCQ : SATA controllers supporting NCQ. The user must set
  918. * sg_tablesize, dma_boundary and can_queue.
  919. */
  920. extern const struct ata_port_operations ata_base_port_ops;
  921. extern const struct ata_port_operations sata_port_ops;
  922. #define ATA_BASE_SHT(drv_name) \
  923. .module = THIS_MODULE, \
  924. .name = drv_name, \
  925. .ioctl = ata_scsi_ioctl, \
  926. .queuecommand = ata_scsi_queuecmd, \
  927. .can_queue = ATA_DEF_QUEUE, \
  928. .this_id = ATA_SHT_THIS_ID, \
  929. .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
  930. .emulated = ATA_SHT_EMULATED, \
  931. .use_clustering = ATA_SHT_USE_CLUSTERING, \
  932. .proc_name = drv_name, \
  933. .slave_configure = ata_scsi_slave_config, \
  934. .slave_destroy = ata_scsi_slave_destroy, \
  935. .bios_param = ata_std_bios_param
  936. #define ATA_NCQ_SHT(drv_name) \
  937. ATA_BASE_SHT(drv_name), \
  938. .change_queue_depth = ata_scsi_change_queue_depth
  939. /*
  940. * PMP helpers
  941. */
  942. #ifdef CONFIG_SATA_PMP
  943. static inline bool sata_pmp_supported(struct ata_port *ap)
  944. {
  945. return ap->flags & ATA_FLAG_PMP;
  946. }
  947. static inline bool sata_pmp_attached(struct ata_port *ap)
  948. {
  949. return ap->nr_pmp_links != 0;
  950. }
  951. static inline int ata_is_host_link(const struct ata_link *link)
  952. {
  953. return link == &link->ap->link;
  954. }
  955. #else /* CONFIG_SATA_PMP */
  956. static inline bool sata_pmp_supported(struct ata_port *ap)
  957. {
  958. return false;
  959. }
  960. static inline bool sata_pmp_attached(struct ata_port *ap)
  961. {
  962. return false;
  963. }
  964. static inline int ata_is_host_link(const struct ata_link *link)
  965. {
  966. return 1;
  967. }
  968. #endif /* CONFIG_SATA_PMP */
  969. static inline int sata_srst_pmp(struct ata_link *link)
  970. {
  971. if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
  972. return SATA_PMP_CTRL_PORT;
  973. return link->pmp;
  974. }
  975. /*
  976. * printk helpers
  977. */
  978. #define ata_port_printk(ap, lv, fmt, args...) \
  979. printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
  980. #define ata_link_printk(link, lv, fmt, args...) do { \
  981. if (sata_pmp_attached((link)->ap)) \
  982. printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
  983. (link)->pmp , ##args); \
  984. else \
  985. printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
  986. } while(0)
  987. #define ata_dev_printk(dev, lv, fmt, args...) \
  988. printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
  989. (dev)->link->pmp + (dev)->devno , ##args)
  990. /*
  991. * ata_eh_info helpers
  992. */
  993. extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
  994. __attribute__ ((format (printf, 2, 3)));
  995. extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
  996. __attribute__ ((format (printf, 2, 3)));
  997. extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
  998. static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
  999. {
  1000. ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
  1001. ehi->flags |= ATA_EHI_HOTPLUGGED;
  1002. ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
  1003. ehi->err_mask |= AC_ERR_ATA_BUS;
  1004. }
  1005. /*
  1006. * port description helpers
  1007. */
  1008. extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
  1009. __attribute__ ((format (printf, 2, 3)));
  1010. #ifdef CONFIG_PCI
  1011. extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
  1012. const char *name);
  1013. #endif
  1014. static inline unsigned int ata_tag_valid(unsigned int tag)
  1015. {
  1016. return (tag < ATA_MAX_QUEUE) ? 1 : 0;
  1017. }
  1018. static inline unsigned int ata_tag_internal(unsigned int tag)
  1019. {
  1020. return tag == ATA_TAG_INTERNAL;
  1021. }
  1022. /*
  1023. * device helpers
  1024. */
  1025. static inline unsigned int ata_class_enabled(unsigned int class)
  1026. {
  1027. return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
  1028. class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
  1029. }
  1030. static inline unsigned int ata_class_disabled(unsigned int class)
  1031. {
  1032. return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
  1033. class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
  1034. }
  1035. static inline unsigned int ata_class_absent(unsigned int class)
  1036. {
  1037. return !ata_class_enabled(class) && !ata_class_disabled(class);
  1038. }
  1039. static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
  1040. {
  1041. return ata_class_enabled(dev->class);
  1042. }
  1043. static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
  1044. {
  1045. return ata_class_disabled(dev->class);
  1046. }
  1047. static inline unsigned int ata_dev_absent(const struct ata_device *dev)
  1048. {
  1049. return ata_class_absent(dev->class);
  1050. }
  1051. /*
  1052. * link helpers
  1053. */
  1054. static inline int ata_link_max_devices(const struct ata_link *link)
  1055. {
  1056. if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
  1057. return 2;
  1058. return 1;
  1059. }
  1060. static inline int ata_link_active(struct ata_link *link)
  1061. {
  1062. return ata_tag_valid(link->active_tag) || link->sactive;
  1063. }
  1064. static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
  1065. {
  1066. if (sata_pmp_attached(ap))
  1067. return ap->pmp_link;
  1068. return &ap->link;
  1069. }
  1070. static inline struct ata_link *ata_port_next_link(struct ata_link *link)
  1071. {
  1072. struct ata_port *ap = link->ap;
  1073. if (ata_is_host_link(link)) {
  1074. if (!sata_pmp_attached(ap))
  1075. return NULL;
  1076. return ap->pmp_link;
  1077. }
  1078. if (++link < ap->nr_pmp_links + ap->pmp_link)
  1079. return link;
  1080. return NULL;
  1081. }
  1082. #define __ata_port_for_each_link(lk, ap) \
  1083. for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
  1084. #define ata_port_for_each_link(link, ap) \
  1085. for ((link) = ata_port_first_link(ap); (link); \
  1086. (link) = ata_port_next_link(link))
  1087. #define ata_link_for_each_dev(dev, link) \
  1088. for ((dev) = (link)->device; \
  1089. (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
  1090. (dev)++)
  1091. #define ata_link_for_each_dev_reverse(dev, link) \
  1092. for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
  1093. (dev) >= (link)->device || ((dev) = NULL); (dev)--)
  1094. /**
  1095. * ata_ncq_enabled - Test whether NCQ is enabled
  1096. * @dev: ATA device to test for
  1097. *
  1098. * LOCKING:
  1099. * spin_lock_irqsave(host lock)
  1100. *
  1101. * RETURNS:
  1102. * 1 if NCQ is enabled for @dev, 0 otherwise.
  1103. */
  1104. static inline int ata_ncq_enabled(struct ata_device *dev)
  1105. {
  1106. return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
  1107. ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
  1108. }
  1109. static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
  1110. {
  1111. qc->tf.ctl |= ATA_NIEN;
  1112. }
  1113. static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
  1114. unsigned int tag)
  1115. {
  1116. if (likely(ata_tag_valid(tag)))
  1117. return &ap->qcmd[tag];
  1118. return NULL;
  1119. }
  1120. static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
  1121. unsigned int tag)
  1122. {
  1123. struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
  1124. if (unlikely(!qc) || !ap->ops->error_handler)
  1125. return qc;
  1126. if ((qc->flags & (ATA_QCFLAG_ACTIVE |
  1127. ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
  1128. return qc;
  1129. return NULL;
  1130. }
  1131. static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
  1132. {
  1133. return qc->nbytes - min(qc->extrabytes, qc->nbytes);
  1134. }
  1135. static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
  1136. {
  1137. memset(tf, 0, sizeof(*tf));
  1138. tf->ctl = dev->link->ap->ctl;
  1139. if (dev->devno == 0)
  1140. tf->device = ATA_DEVICE_OBS;
  1141. else
  1142. tf->device = ATA_DEVICE_OBS | ATA_DEV1;
  1143. }
  1144. static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
  1145. {
  1146. qc->dma_dir = DMA_NONE;
  1147. qc->sg = NULL;
  1148. qc->flags = 0;
  1149. qc->cursg = NULL;
  1150. qc->cursg_ofs = 0;
  1151. qc->nbytes = qc->extrabytes = qc->curbytes = 0;
  1152. qc->n_elem = 0;
  1153. qc->err_mask = 0;
  1154. qc->sect_size = ATA_SECT_SIZE;
  1155. ata_tf_init(qc->dev, &qc->tf);
  1156. /* init result_tf such that it indicates normal completion */
  1157. qc->result_tf.command = ATA_DRDY;
  1158. qc->result_tf.feature = 0;
  1159. }
  1160. static inline int ata_try_flush_cache(const struct ata_device *dev)
  1161. {
  1162. return ata_id_wcache_enabled(dev->id) ||
  1163. ata_id_has_flush(dev->id) ||
  1164. ata_id_has_flush_ext(dev->id);
  1165. }
  1166. static inline unsigned int ac_err_mask(u8 status)
  1167. {
  1168. if (status & (ATA_BUSY | ATA_DRQ))
  1169. return AC_ERR_HSM;
  1170. if (status & (ATA_ERR | ATA_DF))
  1171. return AC_ERR_DEV;
  1172. return 0;
  1173. }
  1174. static inline unsigned int __ac_err_mask(u8 status)
  1175. {
  1176. unsigned int mask = ac_err_mask(status);
  1177. if (mask == 0)
  1178. return AC_ERR_OTHER;
  1179. return mask;
  1180. }
  1181. static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
  1182. {
  1183. return *(struct ata_port **)&host->hostdata[0];
  1184. }
  1185. static inline int ata_check_ready(u8 status)
  1186. {
  1187. if (!(status & ATA_BUSY))
  1188. return 1;
  1189. /* 0xff indicates either no device or device not ready */
  1190. if (status == 0xff)
  1191. return -ENODEV;
  1192. return 0;
  1193. }
  1194. /**************************************************************************
  1195. * PMP - drivers/ata/libata-pmp.c
  1196. */
  1197. #ifdef CONFIG_SATA_PMP
  1198. extern const struct ata_port_operations sata_pmp_port_ops;
  1199. extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
  1200. extern void sata_pmp_error_handler(struct ata_port *ap);
  1201. #else /* CONFIG_SATA_PMP */
  1202. #define sata_pmp_port_ops sata_port_ops
  1203. #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
  1204. #define sata_pmp_error_handler ata_std_error_handler
  1205. #endif /* CONFIG_SATA_PMP */
  1206. /**************************************************************************
  1207. * SFF - drivers/ata/libata-sff.c
  1208. */
  1209. #ifdef CONFIG_ATA_SFF
  1210. extern const struct ata_port_operations ata_sff_port_ops;
  1211. extern const struct ata_port_operations ata_bmdma_port_ops;
  1212. /* PIO only, sg_tablesize and dma_boundary limits can be removed */
  1213. #define ATA_PIO_SHT(drv_name) \
  1214. ATA_BASE_SHT(drv_name), \
  1215. .sg_tablesize = LIBATA_MAX_PRD, \
  1216. .dma_boundary = ATA_DMA_BOUNDARY
  1217. #define ATA_BMDMA_SHT(drv_name) \
  1218. ATA_BASE_SHT(drv_name), \
  1219. .sg_tablesize = LIBATA_MAX_PRD, \
  1220. .dma_boundary = ATA_DMA_BOUNDARY
  1221. extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
  1222. extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
  1223. extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
  1224. extern u8 ata_sff_check_status(struct ata_port *ap);
  1225. extern u8 ata_sff_altstatus(struct ata_port *ap);
  1226. extern int ata_sff_busy_sleep(struct ata_port *ap,
  1227. unsigned long timeout_pat, unsigned long timeout);
  1228. extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
  1229. extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
  1230. extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
  1231. extern void ata_sff_exec_command(struct ata_port *ap,
  1232. const struct ata_taskfile *tf);
  1233. extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
  1234. unsigned char *buf, unsigned int buflen, int rw);
  1235. extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
  1236. unsigned char *buf, unsigned int buflen, int rw);
  1237. extern u8 ata_sff_irq_on(struct ata_port *ap);
  1238. extern void ata_sff_irq_clear(struct ata_port *ap);
  1239. extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
  1240. u8 status, int in_wq);
  1241. extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
  1242. extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
  1243. extern unsigned int ata_sff_host_intr(struct ata_port *ap,
  1244. struct ata_queued_cmd *qc);
  1245. extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
  1246. extern void ata_sff_freeze(struct ata_port *ap);
  1247. extern void ata_sff_thaw(struct ata_port *ap);
  1248. extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
  1249. extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
  1250. u8 *r_err);
  1251. extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
  1252. unsigned long deadline);
  1253. extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
  1254. unsigned long deadline);
  1255. extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
  1256. unsigned long deadline);
  1257. extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
  1258. extern void ata_sff_error_handler(struct ata_port *ap);
  1259. extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
  1260. extern int ata_sff_port_start(struct ata_port *ap);
  1261. extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
  1262. extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
  1263. unsigned long xfer_mask);
  1264. extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
  1265. extern void ata_bmdma_start(struct ata_queued_cmd *qc);
  1266. extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
  1267. extern u8 ata_bmdma_status(struct ata_port *ap);
  1268. extern void ata_bus_reset(struct ata_port *ap);
  1269. #ifdef CONFIG_PCI
  1270. extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
  1271. extern int ata_pci_bmdma_init(struct ata_host *host);
  1272. extern int ata_pci_sff_init_host(struct ata_host *host);
  1273. extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
  1274. const struct ata_port_info * const * ppi,
  1275. struct ata_host **r_host);
  1276. extern int ata_pci_sff_activate_host(struct ata_host *host,
  1277. irq_handler_t irq_handler,
  1278. struct scsi_host_template *sht);
  1279. extern int ata_pci_sff_init_one(struct pci_dev *pdev,
  1280. const struct ata_port_info * const * ppi,
  1281. struct scsi_host_template *sht, void *host_priv);
  1282. #endif /* CONFIG_PCI */
  1283. /**
  1284. * ata_sff_pause - Flush writes and pause 400 nanoseconds.
  1285. * @ap: Port to wait for.
  1286. *
  1287. * LOCKING:
  1288. * Inherited from caller.
  1289. */
  1290. static inline void ata_sff_pause(struct ata_port *ap)
  1291. {
  1292. ata_sff_altstatus(ap);
  1293. ndelay(400);
  1294. }
  1295. /**
  1296. * ata_sff_busy_wait - Wait for a port status register
  1297. * @ap: Port to wait for.
  1298. * @bits: bits that must be clear
  1299. * @max: number of 10uS waits to perform
  1300. *
  1301. * Waits up to max*10 microseconds for the selected bits in the port's
  1302. * status register to be cleared.
  1303. * Returns final value of status register.
  1304. *
  1305. * LOCKING:
  1306. * Inherited from caller.
  1307. */
  1308. static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
  1309. unsigned int max)
  1310. {
  1311. u8 status;
  1312. do {
  1313. udelay(10);
  1314. status = ap->ops->sff_check_status(ap);
  1315. max--;
  1316. } while (status != 0xff && (status & bits) && (max > 0));
  1317. return status;
  1318. }
  1319. /**
  1320. * ata_wait_idle - Wait for a port to be idle.
  1321. * @ap: Port to wait for.
  1322. *
  1323. * Waits up to 10ms for port's BUSY and DRQ signals to clear.
  1324. * Returns final value of status register.
  1325. *
  1326. * LOCKING:
  1327. * Inherited from caller.
  1328. */
  1329. static inline u8 ata_wait_idle(struct ata_port *ap)
  1330. {
  1331. u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
  1332. #ifdef ATA_DEBUG
  1333. if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
  1334. ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
  1335. status);
  1336. #endif
  1337. return status;
  1338. }
  1339. #endif /* CONFIG_ATA_SFF */
  1340. #endif /* __LINUX_LIBATA_H__ */