2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
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)
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.
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.
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
33 #include <asm/scatterlist.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
41 * Define if arch has non-standard setup. This is a _PCI_ standard
42 * not a legacy or ISA standard.
44 #ifdef CONFIG_ATA_NONSTANDARD
45 #include <asm/libata-portmap.h>
47 #include <asm-generic/libata-portmap.h>
51 * compile-time options: to be removed as soon as all the drivers are
52 * converted to the new debugging mechanism
54 #undef ATA_DEBUG /* debugging output */
55 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
56 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
57 #undef ATA_NDEBUG /* define to disable quick runtime checks */
60 /* note: prints function name for you */
62 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
63 #ifdef ATA_VERBOSE_DEBUG
64 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
66 #define VPRINTK(fmt, args...)
67 #endif /* ATA_VERBOSE_DEBUG */
69 #define DPRINTK(fmt, args...)
70 #define VPRINTK(fmt, args...)
71 #endif /* ATA_DEBUG */
73 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
75 /* NEW: debug levels */
76 #define HAVE_LIBATA_MSG 1
80 ATA_MSG_INFO = 0x0002,
81 ATA_MSG_PROBE = 0x0004,
82 ATA_MSG_WARN = 0x0008,
83 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_INTR = 0x0040,
89 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
90 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
91 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
92 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
93 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
94 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
95 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
96 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100 if (dval < 0 || dval >= (sizeof(u32) * 8))
101 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
104 return (1 << dval) - 1;
107 /* defines only for the constants which don't work well as enums */
108 #define ATA_TAG_POISON 0xfafbfcfdU
110 /* move to PCI layer? */
111 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
117 /* various global constants */
118 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
119 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
122 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
124 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
126 ATA_DEF_BUSY_WAIT = 10000,
127 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
129 ATA_SHT_EMULATED = 1,
130 ATA_SHT_CMD_PER_LUN = 1,
131 ATA_SHT_THIS_ID = -1,
132 ATA_SHT_USE_CLUSTERING = 1,
134 /* struct ata_device stuff */
135 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
136 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
137 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
138 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
139 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
140 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
141 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
142 ATA_DFLAG_AN = (1 << 7), /* device supports AN */
143 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
145 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
146 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
147 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
148 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
150 ATA_DFLAG_DETACH = (1 << 16),
151 ATA_DFLAG_DETACHED = (1 << 17),
153 ATA_DEV_UNKNOWN = 0, /* unknown device */
154 ATA_DEV_ATA = 1, /* ATA device */
155 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
156 ATA_DEV_ATAPI = 3, /* ATAPI device */
157 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
158 ATA_DEV_PMP = 5, /* SATA port multiplier */
159 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
160 ATA_DEV_SEMB = 7, /* SEMB */
161 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
162 ATA_DEV_NONE = 9, /* no device */
164 /* struct ata_link flags */
165 ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */
166 ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H
167 * Register FIS clearing BSY */
169 /* struct ata_port flags */
170 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
171 /* (doesn't imply presence) */
172 ATA_FLAG_SATA = (1 << 1),
173 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
174 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
175 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
176 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
177 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
178 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
179 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
180 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
181 * doesn't handle PIO interrupts */
182 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
183 ATA_FLAG_DEBUGMSG = (1 << 13),
184 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
185 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
186 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
187 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
188 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
190 /* The following flag belongs to ap->pflags but is kept in
191 * ap->flags because it's referenced in many LLDs and will be
192 * removed in not-too-distant future.
194 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
196 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
198 /* struct ata_port pflags */
199 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
200 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
201 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
202 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
203 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
204 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
205 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
206 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
208 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
209 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
210 ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */
212 /* struct ata_queued_cmd flags */
213 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
214 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
215 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
216 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
217 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
218 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
219 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
221 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
222 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
223 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
226 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
227 ATA_HOST_STARTED = (1 << 1), /* Host started */
229 /* bits 24:31 of host->flags are reserved for LLD specific flags */
231 /* various lengths of time */
232 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
233 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
234 ATA_TMOUT_INTERNAL = 30 * HZ,
235 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
249 /* SATA port states */
254 /* encoding various smaller bitmaps into a single
255 * unsigned int bitmap
262 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
263 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
265 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
266 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
267 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
269 /* size of buffer to pad xfers ending on unaligned boundaries */
271 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
276 /* return values for ->qc_defer */
280 /* desc_len for ata_eh_info and context */
281 ATA_EH_DESC_LEN = 80,
283 /* reset / recovery action types */
284 ATA_EH_REVALIDATE = (1 << 0),
285 ATA_EH_SOFTRESET = (1 << 1),
286 ATA_EH_HARDRESET = (1 << 2),
288 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
289 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
291 /* ata_eh_info->flags */
292 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
293 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
294 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
295 ATA_EHI_QUIET = (1 << 3), /* be quiet */
297 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
298 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
299 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
300 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
301 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
303 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
304 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
306 /* max tries if error condition is still set after ->error_handler */
307 ATA_EH_MAX_TRIES = 5,
309 /* how hard are we gonna try to probe/recover devices */
310 ATA_PROBE_MAX_TRIES = 3,
311 ATA_EH_DEV_TRIES = 3,
312 ATA_EH_PMP_TRIES = 5,
313 ATA_EH_PMP_LINK_TRIES = 3,
315 SATA_PMP_SCR_TIMEOUT = 250,
317 /* Horkage types. May be set by libata or controller on drives
318 (some horkage may be drive/controller pair dependant */
320 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
321 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
322 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
323 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
324 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
327 enum hsm_task_states {
328 HSM_ST_IDLE, /* no command on going */
329 HSM_ST_FIRST, /* (waiting the device to)
330 write CDB or first data block */
331 HSM_ST, /* (waiting the device to) transfer data */
332 HSM_ST_LAST, /* (waiting the device to) complete command */
333 HSM_ST_ERR, /* error */
336 enum ata_completion_errors {
337 AC_ERR_DEV = (1 << 0), /* device reported error */
338 AC_ERR_HSM = (1 << 1), /* host state machine violation */
339 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
340 AC_ERR_MEDIA = (1 << 3), /* media error */
341 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
342 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
343 AC_ERR_SYSTEM = (1 << 6), /* system error */
344 AC_ERR_INVALID = (1 << 7), /* invalid argument */
345 AC_ERR_OTHER = (1 << 8), /* unknown */
346 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
347 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
350 /* forward declarations */
352 struct ata_port_operations;
355 struct ata_queued_cmd;
358 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
359 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
360 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
361 unsigned long deadline);
362 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
365 void __iomem *cmd_addr;
366 void __iomem *data_addr;
367 void __iomem *error_addr;
368 void __iomem *feature_addr;
369 void __iomem *nsect_addr;
370 void __iomem *lbal_addr;
371 void __iomem *lbam_addr;
372 void __iomem *lbah_addr;
373 void __iomem *device_addr;
374 void __iomem *status_addr;
375 void __iomem *command_addr;
376 void __iomem *altstatus_addr;
377 void __iomem *ctl_addr;
378 void __iomem *bmdma_addr;
379 void __iomem *scr_addr;
385 void __iomem * const *iomap;
386 unsigned int n_ports;
388 const struct ata_port_operations *ops;
390 #ifdef CONFIG_ATA_ACPI
391 acpi_handle acpi_handle;
393 struct ata_port *simplex_claimed; /* channel owning the DMA */
394 struct ata_port *ports[0];
397 struct ata_queued_cmd {
399 struct ata_device *dev;
401 struct scsi_cmnd *scsicmd;
402 void (*scsidone)(struct scsi_cmnd *);
404 struct ata_taskfile tf;
405 u8 cdb[ATAPI_CDB_LEN];
407 unsigned long flags; /* ATA_QCFLAG_xxx */
410 unsigned int orig_n_elem;
414 unsigned int pad_len;
415 unsigned int sect_size;
418 unsigned int curbytes;
421 unsigned int cursg_ofs;
423 struct scatterlist sgent;
424 struct scatterlist pad_sgent;
427 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
428 struct scatterlist *__sg;
430 unsigned int err_mask;
431 struct ata_taskfile result_tf;
432 ata_qc_cb_t complete_fn;
438 struct ata_port_stats {
439 unsigned long unhandled_irq;
440 unsigned long idle_irq;
441 unsigned long rw_reqbuf;
444 struct ata_ering_entry {
446 unsigned int err_mask;
452 struct ata_ering_entry ring[ATA_ERING_SIZE];
456 struct ata_link *link;
457 unsigned int devno; /* 0 or 1 */
458 unsigned long flags; /* ATA_DFLAG_xxx */
459 unsigned int horkage; /* List of broken features */
460 struct scsi_device *sdev; /* attached SCSI device */
461 #ifdef CONFIG_ATA_ACPI
462 acpi_handle acpi_handle;
464 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
465 u64 n_sectors; /* size of device, if ATA */
466 unsigned int class; /* ATA_DEV_xxx */
469 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
470 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
476 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
478 unsigned int multi_count; /* sectors count for
479 READ/WRITE MULTIPLE */
480 unsigned int max_sectors; /* per-device max sectors */
481 unsigned int cdb_len;
483 /* per-dev xfer mask */
484 unsigned int pio_mask;
485 unsigned int mwdma_mask;
486 unsigned int udma_mask;
488 /* for CHS addressing */
489 u16 cylinders; /* Number of cylinders */
490 u16 heads; /* Number of heads */
491 u16 sectors; /* Number of sectors per track */
494 struct ata_ering ering;
498 /* Offset into struct ata_device. Fields above it are maintained
499 * acress device init. Fields below are zeroed.
501 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
504 struct ata_device *dev; /* offending device */
505 u32 serror; /* SError from LLDD */
506 unsigned int err_mask; /* port-wide err_mask */
507 unsigned int action; /* ATA_EH_* action mask */
508 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
509 unsigned int flags; /* ATA_EHI_* flags */
511 unsigned int probe_mask;
513 char desc[ATA_EH_DESC_LEN];
517 struct ata_eh_context {
518 struct ata_eh_info i;
519 int tries[ATA_MAX_DEVICES];
520 unsigned int classes[ATA_MAX_DEVICES];
521 unsigned int did_probe_mask;
524 struct ata_acpi_drive
530 struct ata_acpi_gtm {
531 struct ata_acpi_drive drive[2];
537 int pmp; /* port multiplier port # */
539 unsigned int active_tag; /* active tag on this link */
540 u32 sactive; /* active NCQ commands */
542 unsigned int flags; /* ATA_LFLAG_xxx */
544 unsigned int hw_sata_spd_limit;
545 unsigned int sata_spd_limit;
546 unsigned int sata_spd; /* current SATA PHY speed */
548 /* record runtime error info, protected by host_set lock */
549 struct ata_eh_info eh_info;
551 struct ata_eh_context eh_context;
553 struct ata_device device[ATA_MAX_DEVICES];
557 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
558 const struct ata_port_operations *ops;
560 unsigned long flags; /* ATA_FLAG_xxx */
561 unsigned int pflags; /* ATA_PFLAG_xxx */
562 unsigned int print_id; /* user visible unique port ID */
563 unsigned int port_no; /* 0 based port no. inside the host */
565 struct ata_prd *prd; /* our SG list */
566 dma_addr_t prd_dma; /* and its DMA mapping */
568 void *pad; /* array of DMA pad buffers */
571 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
573 u8 ctl; /* cache of ATA control register */
574 u8 last_ctl; /* Cache last written value */
575 unsigned int pio_mask;
576 unsigned int mwdma_mask;
577 unsigned int udma_mask;
578 unsigned int cbl; /* cable type; ATA_CBL_xxx */
580 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
581 unsigned long qc_allocated;
582 unsigned int qc_active;
583 int nr_active_links; /* #links with active qcs */
585 struct ata_link link; /* host default link */
587 int nr_pmp_links; /* nr of available PMP links */
588 struct ata_link *pmp_link; /* array of PMP links */
589 struct ata_link *excl_link; /* for PMP qc exclusion */
591 struct ata_port_stats stats;
592 struct ata_host *host;
595 void *port_task_data;
596 struct delayed_work port_task;
597 struct delayed_work hotplug_task;
598 struct work_struct scsi_rescan_task;
600 unsigned int hsm_task_state;
603 struct list_head eh_done_q;
604 wait_queue_head_t eh_wait_q;
607 pm_message_t pm_mesg;
610 struct timer_list fastdrain_timer;
611 unsigned long fastdrain_cnt;
615 #ifdef CONFIG_ATA_ACPI
616 acpi_handle acpi_handle;
617 struct ata_acpi_gtm acpi_gtm;
619 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
622 struct ata_port_operations {
623 void (*dev_config) (struct ata_device *);
625 void (*set_piomode) (struct ata_port *, struct ata_device *);
626 void (*set_dmamode) (struct ata_port *, struct ata_device *);
627 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
629 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
630 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
632 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
633 u8 (*check_status)(struct ata_port *ap);
634 u8 (*check_altstatus)(struct ata_port *ap);
635 void (*dev_select)(struct ata_port *ap, unsigned int device);
637 void (*phy_reset) (struct ata_port *ap); /* obsolete */
638 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
640 int (*cable_detect) (struct ata_port *ap);
642 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
644 void (*bmdma_setup) (struct ata_queued_cmd *qc);
645 void (*bmdma_start) (struct ata_queued_cmd *qc);
647 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
649 int (*qc_defer) (struct ata_queued_cmd *qc);
650 void (*qc_prep) (struct ata_queued_cmd *qc);
651 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
653 /* port multiplier */
654 void (*pmp_attach) (struct ata_port *ap);
655 void (*pmp_detach) (struct ata_port *ap);
656 int (*pmp_read) (struct ata_device *dev, int pmp, int reg, u32 *r_val);
657 int (*pmp_write) (struct ata_device *dev, int pmp, int reg, u32 val);
659 /* Error handlers. ->error_handler overrides ->eng_timeout and
660 * indicates that new-style EH is in place.
662 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
664 void (*freeze) (struct ata_port *ap);
665 void (*thaw) (struct ata_port *ap);
666 void (*error_handler) (struct ata_port *ap);
667 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
669 irq_handler_t irq_handler;
670 void (*irq_clear) (struct ata_port *);
671 u8 (*irq_on) (struct ata_port *);
673 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
674 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
676 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
677 int (*port_resume) (struct ata_port *ap);
679 int (*port_start) (struct ata_port *ap);
680 void (*port_stop) (struct ata_port *ap);
682 void (*host_stop) (struct ata_host *host);
684 void (*bmdma_stop) (struct ata_queued_cmd *qc);
685 u8 (*bmdma_status) (struct ata_port *ap);
688 struct ata_port_info {
689 struct scsi_host_template *sht;
691 unsigned long link_flags;
692 unsigned long pio_mask;
693 unsigned long mwdma_mask;
694 unsigned long udma_mask;
695 const struct ata_port_operations *port_ops;
696 irq_handler_t irq_handler;
701 unsigned short mode; /* ATA mode */
702 unsigned short setup; /* t1 */
703 unsigned short act8b; /* t2 for 8-bit I/O */
704 unsigned short rec8b; /* t2i for 8-bit I/O */
705 unsigned short cyc8b; /* t0 for 8-bit I/O */
706 unsigned short active; /* t2 or tD */
707 unsigned short recover; /* t2i or tK */
708 unsigned short cycle; /* t0 */
709 unsigned short udma; /* t2CYCTYP/2 */
712 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
714 extern const unsigned long sata_deb_timing_normal[];
715 extern const unsigned long sata_deb_timing_hotplug[];
716 extern const unsigned long sata_deb_timing_long[];
718 extern const struct ata_port_operations ata_dummy_port_ops;
719 extern const struct ata_port_info ata_dummy_port_info;
721 static inline const unsigned long *
722 sata_ehc_deb_timing(struct ata_eh_context *ehc)
724 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
725 return sata_deb_timing_hotplug;
727 return sata_deb_timing_normal;
730 static inline int ata_port_is_dummy(struct ata_port *ap)
732 return ap->ops == &ata_dummy_port_ops;
735 extern void sata_print_link_status(struct ata_link *link);
736 extern void ata_port_probe(struct ata_port *);
737 extern void __sata_phy_reset(struct ata_port *ap);
738 extern void sata_phy_reset(struct ata_port *ap);
739 extern void ata_bus_reset(struct ata_port *ap);
740 extern int sata_set_spd(struct ata_link *link);
741 extern int sata_link_debounce(struct ata_link *link,
742 const unsigned long *params, unsigned long deadline);
743 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
744 unsigned long deadline);
745 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
746 extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
747 unsigned long deadline);
748 extern int sata_link_hardreset(struct ata_link *link,
749 const unsigned long *timing, unsigned long deadline);
750 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
751 unsigned long deadline);
752 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
753 extern void ata_port_disable(struct ata_port *);
754 extern void ata_std_ports(struct ata_ioports *ioaddr);
756 extern int ata_pci_init_one (struct pci_dev *pdev,
757 const struct ata_port_info * const * ppi);
758 extern void ata_pci_remove_one (struct pci_dev *pdev);
760 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
761 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
762 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
763 extern int ata_pci_device_resume(struct pci_dev *pdev);
765 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
766 #endif /* CONFIG_PCI */
767 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
768 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
769 const struct ata_port_info * const * ppi, int n_ports);
770 extern int ata_host_start(struct ata_host *host);
771 extern int ata_host_register(struct ata_host *host,
772 struct scsi_host_template *sht);
773 extern int ata_host_activate(struct ata_host *host, int irq,
774 irq_handler_t irq_handler, unsigned long irq_flags,
775 struct scsi_host_template *sht);
776 extern void ata_host_detach(struct ata_host *host);
777 extern void ata_host_init(struct ata_host *, struct device *,
778 unsigned long, const struct ata_port_operations *);
779 extern int ata_scsi_detect(struct scsi_host_template *sht);
780 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
781 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
782 extern void ata_scsi_media_change_notify(struct ata_device *atadev);
783 extern void ata_sas_port_destroy(struct ata_port *);
784 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
785 struct ata_port_info *, struct Scsi_Host *);
786 extern int ata_sas_port_init(struct ata_port *);
787 extern int ata_sas_port_start(struct ata_port *ap);
788 extern void ata_sas_port_stop(struct ata_port *ap);
789 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
790 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
791 struct ata_port *ap);
792 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
793 extern int sata_scr_valid(struct ata_link *link);
794 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
795 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
796 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
797 extern int ata_link_online(struct ata_link *link);
798 extern int ata_link_offline(struct ata_link *link);
800 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
801 extern void ata_host_resume(struct ata_host *host);
803 extern int ata_ratelimit(void);
804 extern int ata_busy_sleep(struct ata_port *ap,
805 unsigned long timeout_pat, unsigned long timeout);
806 extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
807 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
808 void *data, unsigned long delay);
809 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
810 unsigned long interval_msec,
811 unsigned long timeout_msec);
812 extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
816 * Default driver ops implementations
818 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
819 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
820 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
821 u8 pmp, int is_cmd, u8 *fis);
822 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
823 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
824 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
825 extern u8 ata_check_status(struct ata_port *ap);
826 extern u8 ata_altstatus(struct ata_port *ap);
827 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
828 extern int ata_port_start (struct ata_port *ap);
829 extern int ata_sff_port_start (struct ata_port *ap);
830 extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
831 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
832 unsigned int buflen, int write_data);
833 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
834 unsigned int buflen, int write_data);
835 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
836 extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
837 extern void ata_qc_prep(struct ata_queued_cmd *qc);
838 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
839 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
840 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
841 unsigned int buflen);
842 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
843 unsigned int n_elem);
844 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
845 extern void ata_dev_disable(struct ata_device *adev);
846 extern void ata_id_string(const u16 *id, unsigned char *s,
847 unsigned int ofs, unsigned int len);
848 extern void ata_id_c_string(const u16 *id, unsigned char *s,
849 unsigned int ofs, unsigned int len);
850 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
851 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
852 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
853 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
854 extern u8 ata_bmdma_status(struct ata_port *ap);
855 extern void ata_bmdma_irq_clear(struct ata_port *ap);
856 extern void ata_bmdma_freeze(struct ata_port *ap);
857 extern void ata_bmdma_thaw(struct ata_port *ap);
858 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
859 ata_reset_fn_t softreset,
860 ata_reset_fn_t hardreset,
861 ata_postreset_fn_t postreset);
862 extern void ata_bmdma_error_handler(struct ata_port *ap);
863 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
864 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
865 u8 status, int in_wq);
866 extern void ata_qc_complete(struct ata_queued_cmd *qc);
867 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
868 void (*finish_qc)(struct ata_queued_cmd *));
869 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
870 void (*done)(struct scsi_cmnd *));
871 extern int ata_std_bios_param(struct scsi_device *sdev,
872 struct block_device *bdev,
873 sector_t capacity, int geom[]);
874 extern int ata_scsi_slave_config(struct scsi_device *sdev);
875 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
876 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
878 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
879 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
880 extern u8 ata_irq_on(struct ata_port *ap);
882 extern int ata_cable_40wire(struct ata_port *ap);
883 extern int ata_cable_80wire(struct ata_port *ap);
884 extern int ata_cable_sata(struct ata_port *ap);
885 extern int ata_cable_unknown(struct ata_port *ap);
891 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
892 extern int ata_timing_compute(struct ata_device *, unsigned short,
893 struct ata_timing *, int, int);
894 extern void ata_timing_merge(const struct ata_timing *,
895 const struct ata_timing *, struct ata_timing *,
899 ATA_TIMING_SETUP = (1 << 0),
900 ATA_TIMING_ACT8B = (1 << 1),
901 ATA_TIMING_REC8B = (1 << 2),
902 ATA_TIMING_CYC8B = (1 << 3),
903 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
905 ATA_TIMING_ACTIVE = (1 << 4),
906 ATA_TIMING_RECOVER = (1 << 5),
907 ATA_TIMING_CYCLE = (1 << 6),
908 ATA_TIMING_UDMA = (1 << 7),
909 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
910 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
911 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
912 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
916 #ifdef CONFIG_ATA_ACPI
917 extern int ata_acpi_cbl_80wire(struct ata_port *ap);
919 static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
924 unsigned int reg; /* PCI config register to read */
925 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
930 extern int ata_pci_init_sff_host(struct ata_host *host);
931 extern int ata_pci_init_bmdma(struct ata_host *host);
932 extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
933 const struct ata_port_info * const * ppi,
934 struct ata_host **r_host);
935 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
936 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
937 #endif /* CONFIG_PCI */
942 extern void ata_eng_timeout(struct ata_port *ap);
944 extern void ata_port_schedule_eh(struct ata_port *ap);
945 extern int ata_link_abort(struct ata_link *link);
946 extern int ata_port_abort(struct ata_port *ap);
947 extern int ata_port_freeze(struct ata_port *ap);
949 extern void ata_eh_freeze_port(struct ata_port *ap);
950 extern void ata_eh_thaw_port(struct ata_port *ap);
952 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
953 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
955 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
956 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
957 ata_postreset_fn_t postreset);
962 #define ata_port_printk(ap, lv, fmt, args...) \
963 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
965 #define ata_link_printk(link, lv, fmt, args...) do { \
966 if ((link)->ap->nr_pmp_links) \
967 printk(lv"ata%u.%02u: "fmt, (link)->ap->print_id, \
968 (link)->pmp , ##args); \
970 printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args); \
973 #define ata_dev_printk(dev, lv, fmt, args...) \
974 printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, \
975 (dev)->link->pmp + (dev)->devno , ##args)
978 * ata_eh_info helpers
980 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
981 __attribute__ ((format (printf, 2, 3)));
982 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
983 __attribute__ ((format (printf, 2, 3)));
984 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
986 static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi)
988 ehi->flags |= ATA_EHI_RESUME_LINK;
989 ehi->action |= ATA_EH_SOFTRESET;
990 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
993 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
995 ata_ehi_schedule_probe(ehi);
996 ehi->flags |= ATA_EHI_HOTPLUGGED;
997 ehi->err_mask |= AC_ERR_ATA_BUS;
1001 * port description helpers
1003 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1004 __attribute__ ((format (printf, 2, 3)));
1006 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1014 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
1016 if (sg == &qc->pad_sgent)
1020 if (((sg - qc->__sg) + 1) == qc->n_elem)
1025 static inline struct scatterlist *
1026 ata_qc_first_sg(struct ata_queued_cmd *qc)
1031 return &qc->pad_sgent;
1035 static inline struct scatterlist *
1036 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
1038 if (sg == &qc->pad_sgent)
1040 if (++sg - qc->__sg < qc->n_elem)
1043 return &qc->pad_sgent;
1047 #define ata_for_each_sg(sg, qc) \
1048 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
1050 static inline unsigned int ata_tag_valid(unsigned int tag)
1052 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1055 static inline unsigned int ata_tag_internal(unsigned int tag)
1057 return tag == ATA_MAX_QUEUE - 1;
1063 static inline unsigned int ata_class_enabled(unsigned int class)
1065 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1066 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1069 static inline unsigned int ata_class_disabled(unsigned int class)
1071 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1072 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1075 static inline unsigned int ata_class_absent(unsigned int class)
1077 return !ata_class_enabled(class) && !ata_class_disabled(class);
1080 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1082 return ata_class_enabled(dev->class);
1085 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1087 return ata_class_disabled(dev->class);
1090 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1092 return ata_class_absent(dev->class);
1098 static inline int ata_is_host_link(const struct ata_link *link)
1100 return link == &link->ap->link;
1103 static inline int ata_link_max_devices(const struct ata_link *link)
1105 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1110 static inline int ata_link_active(struct ata_link *link)
1112 return ata_tag_valid(link->active_tag) || link->sactive;
1115 static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1117 if (ap->nr_pmp_links)
1118 return ap->pmp_link;
1122 static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1124 struct ata_port *ap = link->ap;
1126 if (link == &ap->link) {
1127 if (!ap->nr_pmp_links)
1129 return ap->pmp_link;
1132 if (++link - ap->pmp_link < ap->nr_pmp_links)
1137 #define __ata_port_for_each_link(lk, ap) \
1138 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1140 #define ata_port_for_each_link(link, ap) \
1141 for ((link) = ata_port_first_link(ap); (link); \
1142 (link) = ata_port_next_link(link))
1144 #define ata_link_for_each_dev(dev, link) \
1145 for ((dev) = (link)->device; \
1146 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1149 #define ata_link_for_each_dev_reverse(dev, link) \
1150 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1151 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1153 static inline u8 ata_chk_status(struct ata_port *ap)
1155 return ap->ops->check_status(ap);
1159 * ata_ncq_enabled - Test whether NCQ is enabled
1160 * @dev: ATA device to test for
1163 * spin_lock_irqsave(host lock)
1166 * 1 if NCQ is enabled for @dev, 0 otherwise.
1168 static inline int ata_ncq_enabled(struct ata_device *dev)
1170 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1171 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1175 * ata_pause - Flush writes and pause 400 nanoseconds.
1176 * @ap: Port to wait for.
1179 * Inherited from caller.
1182 static inline void ata_pause(struct ata_port *ap)
1190 * ata_busy_wait - Wait for a port status register
1191 * @ap: Port to wait for.
1192 * @bits: bits that must be clear
1193 * @max: number of 10uS waits to perform
1195 * Waits up to max*10 microseconds for the selected bits in the port's
1196 * status register to be cleared.
1197 * Returns final value of status register.
1200 * Inherited from caller.
1203 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1210 status = ata_chk_status(ap);
1212 } while (status != 0xff && (status & bits) && (max > 0));
1219 * ata_wait_idle - Wait for a port to be idle.
1220 * @ap: Port to wait for.
1222 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1223 * Returns final value of status register.
1226 * Inherited from caller.
1229 static inline u8 ata_wait_idle(struct ata_port *ap)
1231 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1234 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1235 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1242 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1244 qc->tf.ctl |= ATA_NIEN;
1247 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1250 if (likely(ata_tag_valid(tag)))
1251 return &ap->qcmd[tag];
1255 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1258 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1260 if (unlikely(!qc) || !ap->ops->error_handler)
1263 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1264 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1270 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1272 memset(tf, 0, sizeof(*tf));
1274 tf->ctl = dev->link->ap->ctl;
1275 if (dev->devno == 0)
1276 tf->device = ATA_DEVICE_OBS;
1278 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1281 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1283 qc->dma_dir = DMA_NONE;
1286 qc->cursg = qc->cursg_ofs = 0;
1287 qc->nbytes = qc->curbytes = 0;
1291 qc->sect_size = ATA_SECT_SIZE;
1293 ata_tf_init(qc->dev, &qc->tf);
1295 /* init result_tf such that it indicates normal completion */
1296 qc->result_tf.command = ATA_DRDY;
1297 qc->result_tf.feature = 0;
1300 static inline int ata_try_flush_cache(const struct ata_device *dev)
1302 return ata_id_wcache_enabled(dev->id) ||
1303 ata_id_has_flush(dev->id) ||
1304 ata_id_has_flush_ext(dev->id);
1307 static inline unsigned int ac_err_mask(u8 status)
1309 if (status & (ATA_BUSY | ATA_DRQ))
1311 if (status & (ATA_ERR | ATA_DF))
1316 static inline unsigned int __ac_err_mask(u8 status)
1318 unsigned int mask = ac_err_mask(status);
1320 return AC_ERR_OTHER;
1324 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1327 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1328 &ap->pad_dma, GFP_KERNEL);
1329 return (ap->pad == NULL) ? -ENOMEM : 0;
1332 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1334 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1337 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1339 return *(struct ata_port **)&host->hostdata[0];
1342 #endif /* __LINUX_LIBATA_H__ */