libata.h 37 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/scatterlist.h>
  32. #include <asm/io.h>
  33. #include <linux/ata.h>
  34. #include <linux/workqueue.h>
  35. #include <scsi/scsi_host.h>
  36. #include <asm/libata-portmap.h>
  37. /*
  38. * compile-time options: to be removed as soon as all the drivers are
  39. * converted to the new debugging mechanism
  40. */
  41. #undef ATA_DEBUG /* debugging output */
  42. #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
  43. #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
  44. #undef ATA_NDEBUG /* define to disable quick runtime checks */
  45. #undef ATA_ENABLE_PATA /* define to enable PATA support in some
  46. * low-level drivers */
  47. /* note: prints function name for you */
  48. #ifdef ATA_DEBUG
  49. #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
  50. #ifdef ATA_VERBOSE_DEBUG
  51. #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
  52. #else
  53. #define VPRINTK(fmt, args...)
  54. #endif /* ATA_VERBOSE_DEBUG */
  55. #else
  56. #define DPRINTK(fmt, args...)
  57. #define VPRINTK(fmt, args...)
  58. #endif /* ATA_DEBUG */
  59. #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
  60. /* NEW: debug levels */
  61. #define HAVE_LIBATA_MSG 1
  62. enum {
  63. ATA_MSG_DRV = 0x0001,
  64. ATA_MSG_INFO = 0x0002,
  65. ATA_MSG_PROBE = 0x0004,
  66. ATA_MSG_WARN = 0x0008,
  67. ATA_MSG_MALLOC = 0x0010,
  68. ATA_MSG_CTL = 0x0020,
  69. ATA_MSG_INTR = 0x0040,
  70. ATA_MSG_ERR = 0x0080,
  71. };
  72. #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
  73. #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
  74. #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
  75. #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
  76. #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
  77. #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
  78. #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
  79. #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
  80. static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
  81. {
  82. if (dval < 0 || dval >= (sizeof(u32) * 8))
  83. return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
  84. if (!dval)
  85. return 0;
  86. return (1 << dval) - 1;
  87. }
  88. /* defines only for the constants which don't work well as enums */
  89. #define ATA_TAG_POISON 0xfafbfcfdU
  90. /* move to PCI layer? */
  91. static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
  92. {
  93. return &pdev->dev;
  94. }
  95. enum {
  96. /* various global constants */
  97. LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
  98. ATA_MAX_PORTS = 8,
  99. ATA_DEF_QUEUE = 1,
  100. /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
  101. ATA_MAX_QUEUE = 32,
  102. ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
  103. ATA_MAX_SECTORS = 200, /* FIXME */
  104. ATA_MAX_SECTORS_LBA48 = 65535,
  105. ATA_MAX_BUS = 2,
  106. ATA_DEF_BUSY_WAIT = 10000,
  107. ATA_SHORT_PAUSE = (HZ >> 6) + 1,
  108. ATA_SHT_EMULATED = 1,
  109. ATA_SHT_CMD_PER_LUN = 1,
  110. ATA_SHT_THIS_ID = -1,
  111. ATA_SHT_USE_CLUSTERING = 1,
  112. /* struct ata_device stuff */
  113. ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
  114. ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
  115. ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
  116. ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
  117. ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
  118. ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */
  119. ATA_DFLAG_SUSPENDED = (1 << 9), /* device suspended */
  120. ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
  121. ATA_DFLAG_DETACH = (1 << 16),
  122. ATA_DFLAG_DETACHED = (1 << 17),
  123. ATA_DEV_UNKNOWN = 0, /* unknown device */
  124. ATA_DEV_ATA = 1, /* ATA device */
  125. ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
  126. ATA_DEV_ATAPI = 3, /* ATAPI device */
  127. ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
  128. ATA_DEV_NONE = 5, /* no device */
  129. /* struct ata_port flags */
  130. ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
  131. /* (doesn't imply presence) */
  132. ATA_FLAG_SATA = (1 << 1),
  133. ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
  134. ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
  135. ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
  136. ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
  137. ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
  138. ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
  139. ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
  140. ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
  141. * doesn't handle PIO interrupts */
  142. ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
  143. ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
  144. ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
  145. * Register FIS clearing BSY */
  146. ATA_FLAG_DEBUGMSG = (1 << 13),
  147. /* The following flag belongs to ap->pflags but is kept in
  148. * ap->flags because it's referenced in many LLDs and will be
  149. * removed in not-too-distant future.
  150. */
  151. ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
  152. /* bits 24:31 of ap->flags are reserved for LLD specific flags */
  153. /* struct ata_port pflags */
  154. ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
  155. ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
  156. ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
  157. ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
  158. ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
  159. ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
  160. ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
  161. ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
  162. ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
  163. ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
  164. /* struct ata_queued_cmd flags */
  165. ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
  166. ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
  167. ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
  168. ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
  169. ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
  170. ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
  171. ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
  172. ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
  173. ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
  174. /* host set flags */
  175. ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */
  176. /* various lengths of time */
  177. ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
  178. ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
  179. ATA_TMOUT_INTERNAL = 30 * HZ,
  180. ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
  181. /* ATA bus states */
  182. BUS_UNKNOWN = 0,
  183. BUS_DMA = 1,
  184. BUS_IDLE = 2,
  185. BUS_NOINTR = 3,
  186. BUS_NODATA = 4,
  187. BUS_TIMER = 5,
  188. BUS_PIO = 6,
  189. BUS_EDD = 7,
  190. BUS_IDENTIFY = 8,
  191. BUS_PACKET = 9,
  192. /* SATA port states */
  193. PORT_UNKNOWN = 0,
  194. PORT_ENABLED = 1,
  195. PORT_DISABLED = 2,
  196. /* encoding various smaller bitmaps into a single
  197. * unsigned int bitmap
  198. */
  199. ATA_BITS_PIO = 5,
  200. ATA_BITS_MWDMA = 3,
  201. ATA_BITS_UDMA = 8,
  202. ATA_SHIFT_PIO = 0,
  203. ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
  204. ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
  205. ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
  206. ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
  207. ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
  208. /* size of buffer to pad xfers ending on unaligned boundaries */
  209. ATA_DMA_PAD_SZ = 4,
  210. ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
  211. /* masks for port functions */
  212. ATA_PORT_PRIMARY = (1 << 0),
  213. ATA_PORT_SECONDARY = (1 << 1),
  214. /* ering size */
  215. ATA_ERING_SIZE = 32,
  216. /* desc_len for ata_eh_info and context */
  217. ATA_EH_DESC_LEN = 80,
  218. /* reset / recovery action types */
  219. ATA_EH_REVALIDATE = (1 << 0),
  220. ATA_EH_SOFTRESET = (1 << 1),
  221. ATA_EH_HARDRESET = (1 << 2),
  222. ATA_EH_SUSPEND = (1 << 3),
  223. ATA_EH_RESUME = (1 << 4),
  224. ATA_EH_PM_FREEZE = (1 << 5),
  225. ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
  226. ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
  227. ATA_EH_RESUME | ATA_EH_PM_FREEZE,
  228. /* ata_eh_info->flags */
  229. ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
  230. ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
  231. ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
  232. ATA_EHI_QUIET = (1 << 3), /* be quiet */
  233. ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
  234. ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
  235. /* max repeat if error condition is still set after ->error_handler */
  236. ATA_EH_MAX_REPEAT = 5,
  237. /* how hard are we gonna try to probe/recover devices */
  238. ATA_PROBE_MAX_TRIES = 3,
  239. ATA_EH_RESET_TRIES = 3,
  240. ATA_EH_DEV_TRIES = 3,
  241. /* Drive spinup time (time from power-on to the first D2H FIS)
  242. * in msecs - 8s currently. Failing to get ready in this time
  243. * isn't critical. It will result in reset failure for
  244. * controllers which can't wait for the first D2H FIS. libata
  245. * will retry, so it just has to be long enough to spin up
  246. * most devices.
  247. */
  248. ATA_SPINUP_WAIT = 8000,
  249. };
  250. enum hsm_task_states {
  251. HSM_ST_UNKNOWN, /* state unknown */
  252. HSM_ST_IDLE, /* no command on going */
  253. HSM_ST, /* (waiting the device to) transfer data */
  254. HSM_ST_LAST, /* (waiting the device to) complete command */
  255. HSM_ST_ERR, /* error */
  256. HSM_ST_FIRST, /* (waiting the device to)
  257. write CDB or first data block */
  258. };
  259. enum ata_completion_errors {
  260. AC_ERR_DEV = (1 << 0), /* device reported error */
  261. AC_ERR_HSM = (1 << 1), /* host state machine violation */
  262. AC_ERR_TIMEOUT = (1 << 2), /* timeout */
  263. AC_ERR_MEDIA = (1 << 3), /* media error */
  264. AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
  265. AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
  266. AC_ERR_SYSTEM = (1 << 6), /* system error */
  267. AC_ERR_INVALID = (1 << 7), /* invalid argument */
  268. AC_ERR_OTHER = (1 << 8), /* unknown */
  269. };
  270. /* forward declarations */
  271. struct scsi_device;
  272. struct ata_port_operations;
  273. struct ata_port;
  274. struct ata_queued_cmd;
  275. /* typedefs */
  276. typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
  277. typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
  278. typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
  279. typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
  280. struct ata_ioports {
  281. unsigned long cmd_addr;
  282. unsigned long data_addr;
  283. unsigned long error_addr;
  284. unsigned long feature_addr;
  285. unsigned long nsect_addr;
  286. unsigned long lbal_addr;
  287. unsigned long lbam_addr;
  288. unsigned long lbah_addr;
  289. unsigned long device_addr;
  290. unsigned long status_addr;
  291. unsigned long command_addr;
  292. unsigned long altstatus_addr;
  293. unsigned long ctl_addr;
  294. unsigned long bmdma_addr;
  295. unsigned long scr_addr;
  296. };
  297. struct ata_probe_ent {
  298. struct list_head node;
  299. struct device *dev;
  300. const struct ata_port_operations *port_ops;
  301. struct scsi_host_template *sht;
  302. struct ata_ioports port[ATA_MAX_PORTS];
  303. unsigned int n_ports;
  304. unsigned int hard_port_no;
  305. unsigned int dummy_port_mask;
  306. unsigned int pio_mask;
  307. unsigned int mwdma_mask;
  308. unsigned int udma_mask;
  309. unsigned int legacy_mode;
  310. unsigned long irq;
  311. unsigned long irq2;
  312. unsigned int irq_flags;
  313. unsigned long host_flags;
  314. unsigned long host_set_flags;
  315. void __iomem *mmio_base;
  316. void *private_data;
  317. };
  318. struct ata_host_set {
  319. spinlock_t lock;
  320. struct device *dev;
  321. unsigned long irq;
  322. unsigned long irq2;
  323. void __iomem *mmio_base;
  324. unsigned int n_ports;
  325. void *private_data;
  326. const struct ata_port_operations *ops;
  327. unsigned long flags;
  328. int simplex_claimed; /* Keep seperate in case we
  329. ever need to do this locked */
  330. struct ata_port *ports[0];
  331. };
  332. struct ata_queued_cmd {
  333. struct ata_port *ap;
  334. struct ata_device *dev;
  335. struct scsi_cmnd *scsicmd;
  336. void (*scsidone)(struct scsi_cmnd *);
  337. struct ata_taskfile tf;
  338. u8 cdb[ATAPI_CDB_LEN];
  339. unsigned long flags; /* ATA_QCFLAG_xxx */
  340. unsigned int tag;
  341. unsigned int n_elem;
  342. unsigned int orig_n_elem;
  343. int dma_dir;
  344. unsigned int pad_len;
  345. unsigned int nsect;
  346. unsigned int cursect;
  347. unsigned int nbytes;
  348. unsigned int curbytes;
  349. unsigned int cursg;
  350. unsigned int cursg_ofs;
  351. struct scatterlist sgent;
  352. struct scatterlist pad_sgent;
  353. void *buf_virt;
  354. /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
  355. struct scatterlist *__sg;
  356. unsigned int err_mask;
  357. struct ata_taskfile result_tf;
  358. ata_qc_cb_t complete_fn;
  359. void *private_data;
  360. };
  361. struct ata_host_stats {
  362. unsigned long unhandled_irq;
  363. unsigned long idle_irq;
  364. unsigned long rw_reqbuf;
  365. };
  366. struct ata_ering_entry {
  367. int is_io;
  368. unsigned int err_mask;
  369. u64 timestamp;
  370. };
  371. struct ata_ering {
  372. int cursor;
  373. struct ata_ering_entry ring[ATA_ERING_SIZE];
  374. };
  375. struct ata_device {
  376. struct ata_port *ap;
  377. unsigned int devno; /* 0 or 1 */
  378. unsigned long flags; /* ATA_DFLAG_xxx */
  379. struct scsi_device *sdev; /* attached SCSI device */
  380. /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
  381. u64 n_sectors; /* size of device, if ATA */
  382. unsigned int class; /* ATA_DEV_xxx */
  383. u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
  384. u8 pio_mode;
  385. u8 dma_mode;
  386. u8 xfer_mode;
  387. unsigned int xfer_shift; /* ATA_SHIFT_xxx */
  388. unsigned int multi_count; /* sectors count for
  389. READ/WRITE MULTIPLE */
  390. unsigned int max_sectors; /* per-device max sectors */
  391. unsigned int cdb_len;
  392. /* per-dev xfer mask */
  393. unsigned int pio_mask;
  394. unsigned int mwdma_mask;
  395. unsigned int udma_mask;
  396. /* for CHS addressing */
  397. u16 cylinders; /* Number of cylinders */
  398. u16 heads; /* Number of heads */
  399. u16 sectors; /* Number of sectors per track */
  400. /* error history */
  401. struct ata_ering ering;
  402. };
  403. /* Offset into struct ata_device. Fields above it are maintained
  404. * acress device init. Fields below are zeroed.
  405. */
  406. #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
  407. struct ata_eh_info {
  408. struct ata_device *dev; /* offending device */
  409. u32 serror; /* SError from LLDD */
  410. unsigned int err_mask; /* port-wide err_mask */
  411. unsigned int action; /* ATA_EH_* action mask */
  412. unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
  413. unsigned int flags; /* ATA_EHI_* flags */
  414. unsigned long hotplug_timestamp;
  415. unsigned int probe_mask;
  416. char desc[ATA_EH_DESC_LEN];
  417. int desc_len;
  418. };
  419. struct ata_eh_context {
  420. struct ata_eh_info i;
  421. int tries[ATA_MAX_DEVICES];
  422. unsigned int classes[ATA_MAX_DEVICES];
  423. unsigned int did_probe_mask;
  424. };
  425. struct ata_port {
  426. struct Scsi_Host *host; /* our co-allocated scsi host */
  427. const struct ata_port_operations *ops;
  428. spinlock_t *lock;
  429. unsigned long flags; /* ATA_FLAG_xxx */
  430. unsigned int pflags; /* ATA_PFLAG_xxx */
  431. unsigned int id; /* unique id req'd by scsi midlyr */
  432. unsigned int port_no; /* unique port #; from zero */
  433. unsigned int hard_port_no; /* hardware port #; from zero */
  434. struct ata_prd *prd; /* our SG list */
  435. dma_addr_t prd_dma; /* and its DMA mapping */
  436. void *pad; /* array of DMA pad buffers */
  437. dma_addr_t pad_dma;
  438. struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
  439. u8 ctl; /* cache of ATA control register */
  440. u8 last_ctl; /* Cache last written value */
  441. unsigned int pio_mask;
  442. unsigned int mwdma_mask;
  443. unsigned int udma_mask;
  444. unsigned int cbl; /* cable type; ATA_CBL_xxx */
  445. unsigned int hw_sata_spd_limit;
  446. unsigned int sata_spd_limit; /* SATA PHY speed limit */
  447. /* record runtime error info, protected by host_set lock */
  448. struct ata_eh_info eh_info;
  449. /* EH context owned by EH */
  450. struct ata_eh_context eh_context;
  451. struct ata_device device[ATA_MAX_DEVICES];
  452. struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
  453. unsigned long qc_allocated;
  454. unsigned int qc_active;
  455. unsigned int active_tag;
  456. u32 sactive;
  457. struct ata_host_stats stats;
  458. struct ata_host_set *host_set;
  459. struct device *dev;
  460. struct work_struct port_task;
  461. struct work_struct hotplug_task;
  462. struct work_struct scsi_rescan_task;
  463. unsigned int hsm_task_state;
  464. u32 msg_enable;
  465. struct list_head eh_done_q;
  466. wait_queue_head_t eh_wait_q;
  467. pm_message_t pm_mesg;
  468. int *pm_result;
  469. void *private_data;
  470. u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
  471. };
  472. struct ata_port_operations {
  473. void (*port_disable) (struct ata_port *);
  474. void (*dev_config) (struct ata_port *, struct ata_device *);
  475. void (*set_piomode) (struct ata_port *, struct ata_device *);
  476. void (*set_dmamode) (struct ata_port *, struct ata_device *);
  477. unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
  478. void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
  479. void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
  480. void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
  481. u8 (*check_status)(struct ata_port *ap);
  482. u8 (*check_altstatus)(struct ata_port *ap);
  483. void (*dev_select)(struct ata_port *ap, unsigned int device);
  484. void (*phy_reset) (struct ata_port *ap); /* obsolete */
  485. void (*set_mode) (struct ata_port *ap);
  486. void (*post_set_mode) (struct ata_port *ap);
  487. int (*check_atapi_dma) (struct ata_queued_cmd *qc);
  488. void (*bmdma_setup) (struct ata_queued_cmd *qc);
  489. void (*bmdma_start) (struct ata_queued_cmd *qc);
  490. void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
  491. void (*qc_prep) (struct ata_queued_cmd *qc);
  492. unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
  493. /* Error handlers. ->error_handler overrides ->eng_timeout and
  494. * indicates that new-style EH is in place.
  495. */
  496. void (*eng_timeout) (struct ata_port *ap); /* obsolete */
  497. void (*freeze) (struct ata_port *ap);
  498. void (*thaw) (struct ata_port *ap);
  499. void (*error_handler) (struct ata_port *ap);
  500. void (*post_internal_cmd) (struct ata_queued_cmd *qc);
  501. irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
  502. void (*irq_clear) (struct ata_port *);
  503. u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
  504. void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
  505. u32 val);
  506. int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
  507. int (*port_resume) (struct ata_port *ap);
  508. int (*port_start) (struct ata_port *ap);
  509. void (*port_stop) (struct ata_port *ap);
  510. void (*host_stop) (struct ata_host_set *host_set);
  511. void (*bmdma_stop) (struct ata_queued_cmd *qc);
  512. u8 (*bmdma_status) (struct ata_port *ap);
  513. };
  514. struct ata_port_info {
  515. struct scsi_host_template *sht;
  516. unsigned long host_flags;
  517. unsigned long pio_mask;
  518. unsigned long mwdma_mask;
  519. unsigned long udma_mask;
  520. const struct ata_port_operations *port_ops;
  521. void *private_data;
  522. };
  523. struct ata_timing {
  524. unsigned short mode; /* ATA mode */
  525. unsigned short setup; /* t1 */
  526. unsigned short act8b; /* t2 for 8-bit I/O */
  527. unsigned short rec8b; /* t2i for 8-bit I/O */
  528. unsigned short cyc8b; /* t0 for 8-bit I/O */
  529. unsigned short active; /* t2 or tD */
  530. unsigned short recover; /* t2i or tK */
  531. unsigned short cycle; /* t0 */
  532. unsigned short udma; /* t2CYCTYP/2 */
  533. };
  534. #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
  535. extern const unsigned long sata_deb_timing_normal[];
  536. extern const unsigned long sata_deb_timing_hotplug[];
  537. extern const unsigned long sata_deb_timing_long[];
  538. extern const struct ata_port_operations ata_dummy_port_ops;
  539. static inline const unsigned long *
  540. sata_ehc_deb_timing(struct ata_eh_context *ehc)
  541. {
  542. if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
  543. return sata_deb_timing_hotplug;
  544. else
  545. return sata_deb_timing_normal;
  546. }
  547. static inline int ata_port_is_dummy(struct ata_port *ap)
  548. {
  549. return ap->ops == &ata_dummy_port_ops;
  550. }
  551. extern void ata_port_probe(struct ata_port *);
  552. extern void __sata_phy_reset(struct ata_port *ap);
  553. extern void sata_phy_reset(struct ata_port *ap);
  554. extern void ata_bus_reset(struct ata_port *ap);
  555. extern int sata_set_spd(struct ata_port *ap);
  556. extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
  557. extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
  558. extern int ata_std_prereset(struct ata_port *ap);
  559. extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
  560. extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
  561. extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
  562. extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
  563. extern void ata_port_disable(struct ata_port *);
  564. extern void ata_std_ports(struct ata_ioports *ioaddr);
  565. #ifdef CONFIG_PCI
  566. extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
  567. unsigned int n_ports);
  568. extern void ata_pci_remove_one (struct pci_dev *pdev);
  569. extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
  570. extern void ata_pci_device_do_resume(struct pci_dev *pdev);
  571. extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
  572. extern int ata_pci_device_resume(struct pci_dev *pdev);
  573. extern int ata_pci_clear_simplex(struct pci_dev *pdev);
  574. #endif /* CONFIG_PCI */
  575. extern int ata_device_add(const struct ata_probe_ent *ent);
  576. extern void ata_port_detach(struct ata_port *ap);
  577. extern void ata_host_set_init(struct ata_host_set *, struct device *,
  578. unsigned long, const struct ata_port_operations *);
  579. extern void ata_host_set_remove(struct ata_host_set *host_set);
  580. extern int ata_scsi_detect(struct scsi_host_template *sht);
  581. extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
  582. extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
  583. extern int ata_scsi_release(struct Scsi_Host *host);
  584. extern void ata_sas_port_destroy(struct ata_port *);
  585. extern struct ata_port *ata_sas_port_alloc(struct ata_host_set *,
  586. struct ata_port_info *, struct Scsi_Host *);
  587. extern int ata_sas_port_init(struct ata_port *);
  588. extern int ata_sas_port_start(struct ata_port *ap);
  589. extern void ata_sas_port_stop(struct ata_port *ap);
  590. extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
  591. extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
  592. struct ata_port *ap);
  593. extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
  594. extern int sata_scr_valid(struct ata_port *ap);
  595. extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
  596. extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
  597. extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
  598. extern int ata_port_online(struct ata_port *ap);
  599. extern int ata_port_offline(struct ata_port *ap);
  600. extern int ata_scsi_device_resume(struct scsi_device *);
  601. extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
  602. extern int ata_host_set_suspend(struct ata_host_set *host_set,
  603. pm_message_t mesg);
  604. extern void ata_host_set_resume(struct ata_host_set *host_set);
  605. extern int ata_ratelimit(void);
  606. extern unsigned int ata_busy_sleep(struct ata_port *ap,
  607. unsigned long timeout_pat,
  608. unsigned long timeout);
  609. extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
  610. void *data, unsigned long delay);
  611. extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
  612. unsigned long interval_msec,
  613. unsigned long timeout_msec);
  614. /*
  615. * Default driver ops implementations
  616. */
  617. extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
  618. extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
  619. extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
  620. extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
  621. extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
  622. extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
  623. extern u8 ata_check_status(struct ata_port *ap);
  624. extern u8 ata_altstatus(struct ata_port *ap);
  625. extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
  626. extern int ata_port_start (struct ata_port *ap);
  627. extern void ata_port_stop (struct ata_port *ap);
  628. extern void ata_host_stop (struct ata_host_set *host_set);
  629. extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
  630. extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
  631. unsigned int buflen, int write_data);
  632. extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
  633. unsigned int buflen, int write_data);
  634. extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
  635. unsigned int buflen, int write_data);
  636. extern void ata_qc_prep(struct ata_queued_cmd *qc);
  637. extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
  638. extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
  639. extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
  640. unsigned int buflen);
  641. extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
  642. unsigned int n_elem);
  643. extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
  644. extern void ata_id_string(const u16 *id, unsigned char *s,
  645. unsigned int ofs, unsigned int len);
  646. extern void ata_id_c_string(const u16 *id, unsigned char *s,
  647. unsigned int ofs, unsigned int len);
  648. extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
  649. extern void ata_bmdma_start (struct ata_queued_cmd *qc);
  650. extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
  651. extern u8 ata_bmdma_status(struct ata_port *ap);
  652. extern void ata_bmdma_irq_clear(struct ata_port *ap);
  653. extern void ata_bmdma_freeze(struct ata_port *ap);
  654. extern void ata_bmdma_thaw(struct ata_port *ap);
  655. extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
  656. ata_reset_fn_t softreset,
  657. ata_reset_fn_t hardreset,
  658. ata_postreset_fn_t postreset);
  659. extern void ata_bmdma_error_handler(struct ata_port *ap);
  660. extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
  661. extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
  662. u8 status, int in_wq);
  663. extern void ata_qc_complete(struct ata_queued_cmd *qc);
  664. extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
  665. void (*finish_qc)(struct ata_queued_cmd *));
  666. extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
  667. void (*done)(struct scsi_cmnd *));
  668. extern int ata_std_bios_param(struct scsi_device *sdev,
  669. struct block_device *bdev,
  670. sector_t capacity, int geom[]);
  671. extern int ata_scsi_slave_config(struct scsi_device *sdev);
  672. extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
  673. extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
  674. int queue_depth);
  675. extern struct ata_device *ata_dev_pair(struct ata_device *adev);
  676. /*
  677. * Timing helpers
  678. */
  679. extern unsigned int ata_pio_need_iordy(const struct ata_device *);
  680. extern int ata_timing_compute(struct ata_device *, unsigned short,
  681. struct ata_timing *, int, int);
  682. extern void ata_timing_merge(const struct ata_timing *,
  683. const struct ata_timing *, struct ata_timing *,
  684. unsigned int);
  685. enum {
  686. ATA_TIMING_SETUP = (1 << 0),
  687. ATA_TIMING_ACT8B = (1 << 1),
  688. ATA_TIMING_REC8B = (1 << 2),
  689. ATA_TIMING_CYC8B = (1 << 3),
  690. ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
  691. ATA_TIMING_CYC8B,
  692. ATA_TIMING_ACTIVE = (1 << 4),
  693. ATA_TIMING_RECOVER = (1 << 5),
  694. ATA_TIMING_CYCLE = (1 << 6),
  695. ATA_TIMING_UDMA = (1 << 7),
  696. ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
  697. ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
  698. ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
  699. ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
  700. };
  701. #ifdef CONFIG_PCI
  702. struct pci_bits {
  703. unsigned int reg; /* PCI config register to read */
  704. unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
  705. unsigned long mask;
  706. unsigned long val;
  707. };
  708. extern void ata_pci_host_stop (struct ata_host_set *host_set);
  709. extern struct ata_probe_ent *
  710. ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
  711. extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
  712. extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
  713. #endif /* CONFIG_PCI */
  714. /*
  715. * EH
  716. */
  717. extern void ata_eng_timeout(struct ata_port *ap);
  718. extern void ata_port_schedule_eh(struct ata_port *ap);
  719. extern int ata_port_abort(struct ata_port *ap);
  720. extern int ata_port_freeze(struct ata_port *ap);
  721. extern void ata_eh_freeze_port(struct ata_port *ap);
  722. extern void ata_eh_thaw_port(struct ata_port *ap);
  723. extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
  724. extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
  725. extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
  726. ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
  727. ata_postreset_fn_t postreset);
  728. /*
  729. * printk helpers
  730. */
  731. #define ata_port_printk(ap, lv, fmt, args...) \
  732. printk(lv"ata%u: "fmt, (ap)->id , ##args)
  733. #define ata_dev_printk(dev, lv, fmt, args...) \
  734. printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
  735. /*
  736. * ata_eh_info helpers
  737. */
  738. #define ata_ehi_push_desc(ehi, fmt, args...) do { \
  739. (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
  740. ATA_EH_DESC_LEN - (ehi)->desc_len, \
  741. fmt , ##args); \
  742. } while (0)
  743. #define ata_ehi_clear_desc(ehi) do { \
  744. (ehi)->desc[0] = '\0'; \
  745. (ehi)->desc_len = 0; \
  746. } while (0)
  747. static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
  748. {
  749. if (ehi->flags & ATA_EHI_HOTPLUGGED)
  750. return;
  751. ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
  752. ehi->hotplug_timestamp = jiffies;
  753. ehi->action |= ATA_EH_SOFTRESET;
  754. ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
  755. }
  756. static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
  757. {
  758. __ata_ehi_hotplugged(ehi);
  759. ehi->err_mask |= AC_ERR_ATA_BUS;
  760. }
  761. /*
  762. * qc helpers
  763. */
  764. static inline int
  765. ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
  766. {
  767. if (sg == &qc->pad_sgent)
  768. return 1;
  769. if (qc->pad_len)
  770. return 0;
  771. if (((sg - qc->__sg) + 1) == qc->n_elem)
  772. return 1;
  773. return 0;
  774. }
  775. static inline struct scatterlist *
  776. ata_qc_first_sg(struct ata_queued_cmd *qc)
  777. {
  778. if (qc->n_elem)
  779. return qc->__sg;
  780. if (qc->pad_len)
  781. return &qc->pad_sgent;
  782. return NULL;
  783. }
  784. static inline struct scatterlist *
  785. ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
  786. {
  787. if (sg == &qc->pad_sgent)
  788. return NULL;
  789. if (++sg - qc->__sg < qc->n_elem)
  790. return sg;
  791. if (qc->pad_len)
  792. return &qc->pad_sgent;
  793. return NULL;
  794. }
  795. #define ata_for_each_sg(sg, qc) \
  796. for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
  797. static inline unsigned int ata_tag_valid(unsigned int tag)
  798. {
  799. return (tag < ATA_MAX_QUEUE) ? 1 : 0;
  800. }
  801. static inline unsigned int ata_tag_internal(unsigned int tag)
  802. {
  803. return tag == ATA_MAX_QUEUE - 1;
  804. }
  805. /*
  806. * device helpers
  807. */
  808. static inline unsigned int ata_class_enabled(unsigned int class)
  809. {
  810. return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
  811. }
  812. static inline unsigned int ata_class_disabled(unsigned int class)
  813. {
  814. return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
  815. }
  816. static inline unsigned int ata_class_absent(unsigned int class)
  817. {
  818. return !ata_class_enabled(class) && !ata_class_disabled(class);
  819. }
  820. static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
  821. {
  822. return ata_class_enabled(dev->class);
  823. }
  824. static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
  825. {
  826. return ata_class_disabled(dev->class);
  827. }
  828. static inline unsigned int ata_dev_absent(const struct ata_device *dev)
  829. {
  830. return ata_class_absent(dev->class);
  831. }
  832. static inline unsigned int ata_dev_ready(const struct ata_device *dev)
  833. {
  834. return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
  835. }
  836. /*
  837. * port helpers
  838. */
  839. static inline int ata_port_max_devices(const struct ata_port *ap)
  840. {
  841. if (ap->flags & ATA_FLAG_SLAVE_POSS)
  842. return 2;
  843. return 1;
  844. }
  845. static inline u8 ata_chk_status(struct ata_port *ap)
  846. {
  847. return ap->ops->check_status(ap);
  848. }
  849. /**
  850. * ata_pause - Flush writes and pause 400 nanoseconds.
  851. * @ap: Port to wait for.
  852. *
  853. * LOCKING:
  854. * Inherited from caller.
  855. */
  856. static inline void ata_pause(struct ata_port *ap)
  857. {
  858. ata_altstatus(ap);
  859. ndelay(400);
  860. }
  861. /**
  862. * ata_busy_wait - Wait for a port status register
  863. * @ap: Port to wait for.
  864. *
  865. * Waits up to max*10 microseconds for the selected bits in the port's
  866. * status register to be cleared.
  867. * Returns final value of status register.
  868. *
  869. * LOCKING:
  870. * Inherited from caller.
  871. */
  872. static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
  873. unsigned int max)
  874. {
  875. u8 status;
  876. do {
  877. udelay(10);
  878. status = ata_chk_status(ap);
  879. max--;
  880. } while ((status & bits) && (max > 0));
  881. return status;
  882. }
  883. /**
  884. * ata_wait_idle - Wait for a port to be idle.
  885. * @ap: Port to wait for.
  886. *
  887. * Waits up to 10ms for port's BUSY and DRQ signals to clear.
  888. * Returns final value of status register.
  889. *
  890. * LOCKING:
  891. * Inherited from caller.
  892. */
  893. static inline u8 ata_wait_idle(struct ata_port *ap)
  894. {
  895. u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
  896. if (status & (ATA_BUSY | ATA_DRQ)) {
  897. unsigned long l = ap->ioaddr.status_addr;
  898. if (ata_msg_warn(ap))
  899. printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
  900. status, l);
  901. }
  902. return status;
  903. }
  904. static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
  905. {
  906. qc->tf.ctl |= ATA_NIEN;
  907. }
  908. static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
  909. unsigned int tag)
  910. {
  911. if (likely(ata_tag_valid(tag)))
  912. return &ap->qcmd[tag];
  913. return NULL;
  914. }
  915. static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
  916. unsigned int tag)
  917. {
  918. struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
  919. if (unlikely(!qc) || !ap->ops->error_handler)
  920. return qc;
  921. if ((qc->flags & (ATA_QCFLAG_ACTIVE |
  922. ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
  923. return qc;
  924. return NULL;
  925. }
  926. static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
  927. {
  928. memset(tf, 0, sizeof(*tf));
  929. tf->ctl = dev->ap->ctl;
  930. if (dev->devno == 0)
  931. tf->device = ATA_DEVICE_OBS;
  932. else
  933. tf->device = ATA_DEVICE_OBS | ATA_DEV1;
  934. }
  935. static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
  936. {
  937. qc->__sg = NULL;
  938. qc->flags = 0;
  939. qc->cursect = qc->cursg = qc->cursg_ofs = 0;
  940. qc->nsect = 0;
  941. qc->nbytes = qc->curbytes = 0;
  942. qc->err_mask = 0;
  943. ata_tf_init(qc->dev, &qc->tf);
  944. /* init result_tf such that it indicates normal completion */
  945. qc->result_tf.command = ATA_DRDY;
  946. qc->result_tf.feature = 0;
  947. }
  948. /**
  949. * ata_irq_on - Enable interrupts on a port.
  950. * @ap: Port on which interrupts are enabled.
  951. *
  952. * Enable interrupts on a legacy IDE device using MMIO or PIO,
  953. * wait for idle, clear any pending interrupts.
  954. *
  955. * LOCKING:
  956. * Inherited from caller.
  957. */
  958. static inline u8 ata_irq_on(struct ata_port *ap)
  959. {
  960. struct ata_ioports *ioaddr = &ap->ioaddr;
  961. u8 tmp;
  962. ap->ctl &= ~ATA_NIEN;
  963. ap->last_ctl = ap->ctl;
  964. if (ap->flags & ATA_FLAG_MMIO)
  965. writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
  966. else
  967. outb(ap->ctl, ioaddr->ctl_addr);
  968. tmp = ata_wait_idle(ap);
  969. ap->ops->irq_clear(ap);
  970. return tmp;
  971. }
  972. /**
  973. * ata_irq_ack - Acknowledge a device interrupt.
  974. * @ap: Port on which interrupts are enabled.
  975. *
  976. * Wait up to 10 ms for legacy IDE device to become idle (BUSY
  977. * or BUSY+DRQ clear). Obtain dma status and port status from
  978. * device. Clear the interrupt. Return port status.
  979. *
  980. * LOCKING:
  981. */
  982. static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
  983. {
  984. unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
  985. u8 host_stat, post_stat, status;
  986. status = ata_busy_wait(ap, bits, 1000);
  987. if (status & bits)
  988. if (ata_msg_err(ap))
  989. printk(KERN_ERR "abnormal status 0x%X\n", status);
  990. /* get controller status; clear intr, err bits */
  991. if (ap->flags & ATA_FLAG_MMIO) {
  992. void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
  993. host_stat = readb(mmio + ATA_DMA_STATUS);
  994. writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
  995. mmio + ATA_DMA_STATUS);
  996. post_stat = readb(mmio + ATA_DMA_STATUS);
  997. } else {
  998. host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
  999. outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
  1000. ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
  1001. post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
  1002. }
  1003. if (ata_msg_intr(ap))
  1004. printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
  1005. __FUNCTION__,
  1006. host_stat, post_stat, status);
  1007. return status;
  1008. }
  1009. static inline int ata_try_flush_cache(const struct ata_device *dev)
  1010. {
  1011. return ata_id_wcache_enabled(dev->id) ||
  1012. ata_id_has_flush(dev->id) ||
  1013. ata_id_has_flush_ext(dev->id);
  1014. }
  1015. static inline unsigned int ac_err_mask(u8 status)
  1016. {
  1017. if (status & (ATA_BUSY | ATA_DRQ))
  1018. return AC_ERR_HSM;
  1019. if (status & (ATA_ERR | ATA_DF))
  1020. return AC_ERR_DEV;
  1021. return 0;
  1022. }
  1023. static inline unsigned int __ac_err_mask(u8 status)
  1024. {
  1025. unsigned int mask = ac_err_mask(status);
  1026. if (mask == 0)
  1027. return AC_ERR_OTHER;
  1028. return mask;
  1029. }
  1030. static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
  1031. {
  1032. ap->pad_dma = 0;
  1033. ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
  1034. &ap->pad_dma, GFP_KERNEL);
  1035. return (ap->pad == NULL) ? -ENOMEM : 0;
  1036. }
  1037. static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
  1038. {
  1039. dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
  1040. }
  1041. static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
  1042. {
  1043. return (struct ata_port *) &host->hostdata[0];
  1044. }
  1045. #endif /* __LINUX_LIBATA_H__ */