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 */
220 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
221 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
222 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
225 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
226 ATA_HOST_STARTED = (1 << 1), /* Host started */
228 /* bits 24:31 of host->flags are reserved for LLD specific flags */
230 /* various lengths of time */
231 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
232 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
233 ATA_TMOUT_INTERNAL = 30 * HZ,
234 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
248 /* SATA port states */
253 /* encoding various smaller bitmaps into a single
254 * unsigned int bitmap
261 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
262 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
264 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
265 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
266 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
268 /* size of buffer to pad xfers ending on unaligned boundaries */
270 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
275 /* desc_len for ata_eh_info and context */
276 ATA_EH_DESC_LEN = 80,
278 /* reset / recovery action types */
279 ATA_EH_REVALIDATE = (1 << 0),
280 ATA_EH_SOFTRESET = (1 << 1),
281 ATA_EH_HARDRESET = (1 << 2),
283 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
284 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
286 /* ata_eh_info->flags */
287 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
288 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
289 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
290 ATA_EHI_QUIET = (1 << 3), /* be quiet */
292 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
293 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
294 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
295 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
296 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
298 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
299 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
301 /* max tries if error condition is still set after ->error_handler */
302 ATA_EH_MAX_TRIES = 5,
304 /* how hard are we gonna try to probe/recover devices */
305 ATA_PROBE_MAX_TRIES = 3,
306 ATA_EH_DEV_TRIES = 3,
307 ATA_EH_PMP_TRIES = 5,
308 ATA_EH_PMP_LINK_TRIES = 3,
310 SATA_PMP_SCR_TIMEOUT = 250,
312 /* Horkage types. May be set by libata or controller on drives
313 (some horkage may be drive/controller pair dependant */
315 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
316 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
317 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
318 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
319 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
322 enum hsm_task_states {
323 HSM_ST_IDLE, /* no command on going */
324 HSM_ST_FIRST, /* (waiting the device to)
325 write CDB or first data block */
326 HSM_ST, /* (waiting the device to) transfer data */
327 HSM_ST_LAST, /* (waiting the device to) complete command */
328 HSM_ST_ERR, /* error */
331 enum ata_completion_errors {
332 AC_ERR_DEV = (1 << 0), /* device reported error */
333 AC_ERR_HSM = (1 << 1), /* host state machine violation */
334 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
335 AC_ERR_MEDIA = (1 << 3), /* media error */
336 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
337 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
338 AC_ERR_SYSTEM = (1 << 6), /* system error */
339 AC_ERR_INVALID = (1 << 7), /* invalid argument */
340 AC_ERR_OTHER = (1 << 8), /* unknown */
341 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
342 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
345 /* forward declarations */
347 struct ata_port_operations;
350 struct ata_queued_cmd;
353 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
354 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
355 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
356 unsigned long deadline);
357 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
360 void __iomem *cmd_addr;
361 void __iomem *data_addr;
362 void __iomem *error_addr;
363 void __iomem *feature_addr;
364 void __iomem *nsect_addr;
365 void __iomem *lbal_addr;
366 void __iomem *lbam_addr;
367 void __iomem *lbah_addr;
368 void __iomem *device_addr;
369 void __iomem *status_addr;
370 void __iomem *command_addr;
371 void __iomem *altstatus_addr;
372 void __iomem *ctl_addr;
373 void __iomem *bmdma_addr;
374 void __iomem *scr_addr;
380 void __iomem * const *iomap;
381 unsigned int n_ports;
383 const struct ata_port_operations *ops;
385 #ifdef CONFIG_ATA_ACPI
386 acpi_handle acpi_handle;
388 struct ata_port *simplex_claimed; /* channel owning the DMA */
389 struct ata_port *ports[0];
392 struct ata_queued_cmd {
394 struct ata_device *dev;
396 struct scsi_cmnd *scsicmd;
397 void (*scsidone)(struct scsi_cmnd *);
399 struct ata_taskfile tf;
400 u8 cdb[ATAPI_CDB_LEN];
402 unsigned long flags; /* ATA_QCFLAG_xxx */
405 unsigned int orig_n_elem;
409 unsigned int pad_len;
410 unsigned int sect_size;
413 unsigned int curbytes;
416 unsigned int cursg_ofs;
418 struct scatterlist sgent;
419 struct scatterlist pad_sgent;
422 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
423 struct scatterlist *__sg;
425 unsigned int err_mask;
426 struct ata_taskfile result_tf;
427 ata_qc_cb_t complete_fn;
433 struct ata_port_stats {
434 unsigned long unhandled_irq;
435 unsigned long idle_irq;
436 unsigned long rw_reqbuf;
439 struct ata_ering_entry {
441 unsigned int err_mask;
447 struct ata_ering_entry ring[ATA_ERING_SIZE];
451 struct ata_link *link;
452 unsigned int devno; /* 0 or 1 */
453 unsigned long flags; /* ATA_DFLAG_xxx */
454 unsigned int horkage; /* List of broken features */
455 struct scsi_device *sdev; /* attached SCSI device */
456 #ifdef CONFIG_ATA_ACPI
457 acpi_handle acpi_handle;
459 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
460 u64 n_sectors; /* size of device, if ATA */
461 unsigned int class; /* ATA_DEV_xxx */
464 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
465 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
471 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
473 unsigned int multi_count; /* sectors count for
474 READ/WRITE MULTIPLE */
475 unsigned int max_sectors; /* per-device max sectors */
476 unsigned int cdb_len;
478 /* per-dev xfer mask */
479 unsigned int pio_mask;
480 unsigned int mwdma_mask;
481 unsigned int 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 */
489 struct ata_ering ering;
493 /* Offset into struct ata_device. Fields above it are maintained
494 * acress device init. Fields below are zeroed.
496 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
499 struct ata_device *dev; /* offending device */
500 u32 serror; /* SError from LLDD */
501 unsigned int err_mask; /* port-wide err_mask */
502 unsigned int action; /* ATA_EH_* action mask */
503 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
504 unsigned int flags; /* ATA_EHI_* flags */
506 unsigned int probe_mask;
508 char desc[ATA_EH_DESC_LEN];
512 struct ata_eh_context {
513 struct ata_eh_info i;
514 int tries[ATA_MAX_DEVICES];
515 unsigned int classes[ATA_MAX_DEVICES];
516 unsigned int did_probe_mask;
519 struct ata_acpi_drive
525 struct ata_acpi_gtm {
526 struct ata_acpi_drive drive[2];
532 int pmp; /* port multiplier port # */
534 unsigned int active_tag; /* active tag on this link */
535 u32 sactive; /* active NCQ commands */
537 unsigned int flags; /* ATA_LFLAG_xxx */
539 unsigned int hw_sata_spd_limit;
540 unsigned int sata_spd_limit;
541 unsigned int sata_spd; /* current SATA PHY speed */
543 /* record runtime error info, protected by host_set lock */
544 struct ata_eh_info eh_info;
546 struct ata_eh_context eh_context;
548 struct ata_device device[ATA_MAX_DEVICES];
552 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
553 const struct ata_port_operations *ops;
555 unsigned long flags; /* ATA_FLAG_xxx */
556 unsigned int pflags; /* ATA_PFLAG_xxx */
557 unsigned int print_id; /* user visible unique port ID */
558 unsigned int port_no; /* 0 based port no. inside the host */
560 struct ata_prd *prd; /* our SG list */
561 dma_addr_t prd_dma; /* and its DMA mapping */
563 void *pad; /* array of DMA pad buffers */
566 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
568 u8 ctl; /* cache of ATA control register */
569 u8 last_ctl; /* Cache last written value */
570 unsigned int pio_mask;
571 unsigned int mwdma_mask;
572 unsigned int udma_mask;
573 unsigned int cbl; /* cable type; ATA_CBL_xxx */
575 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
576 unsigned long qc_allocated;
577 unsigned int qc_active;
579 struct ata_link link; /* host default link */
581 int nr_pmp_links; /* nr of available PMP links */
582 struct ata_link *pmp_link; /* array of PMP links */
584 struct ata_port_stats stats;
585 struct ata_host *host;
588 void *port_task_data;
589 struct delayed_work port_task;
590 struct delayed_work hotplug_task;
591 struct work_struct scsi_rescan_task;
593 unsigned int hsm_task_state;
596 struct list_head eh_done_q;
597 wait_queue_head_t eh_wait_q;
600 pm_message_t pm_mesg;
603 struct timer_list fastdrain_timer;
604 unsigned long fastdrain_cnt;
608 #ifdef CONFIG_ATA_ACPI
609 acpi_handle acpi_handle;
610 struct ata_acpi_gtm acpi_gtm;
612 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
615 struct ata_port_operations {
616 void (*dev_config) (struct ata_device *);
618 void (*set_piomode) (struct ata_port *, struct ata_device *);
619 void (*set_dmamode) (struct ata_port *, struct ata_device *);
620 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
622 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
623 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
625 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
626 u8 (*check_status)(struct ata_port *ap);
627 u8 (*check_altstatus)(struct ata_port *ap);
628 void (*dev_select)(struct ata_port *ap, unsigned int device);
630 void (*phy_reset) (struct ata_port *ap); /* obsolete */
631 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
633 int (*cable_detect) (struct ata_port *ap);
635 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
637 void (*bmdma_setup) (struct ata_queued_cmd *qc);
638 void (*bmdma_start) (struct ata_queued_cmd *qc);
640 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
642 void (*qc_prep) (struct ata_queued_cmd *qc);
643 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
645 /* port multiplier */
646 void (*pmp_attach) (struct ata_port *ap);
647 void (*pmp_detach) (struct ata_port *ap);
648 int (*pmp_read) (struct ata_device *dev, int pmp, int reg, u32 *r_val);
649 int (*pmp_write) (struct ata_device *dev, int pmp, int reg, u32 val);
651 /* Error handlers. ->error_handler overrides ->eng_timeout and
652 * indicates that new-style EH is in place.
654 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
656 void (*freeze) (struct ata_port *ap);
657 void (*thaw) (struct ata_port *ap);
658 void (*error_handler) (struct ata_port *ap);
659 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
661 irq_handler_t irq_handler;
662 void (*irq_clear) (struct ata_port *);
663 u8 (*irq_on) (struct ata_port *);
665 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
666 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
668 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
669 int (*port_resume) (struct ata_port *ap);
671 int (*port_start) (struct ata_port *ap);
672 void (*port_stop) (struct ata_port *ap);
674 void (*host_stop) (struct ata_host *host);
676 void (*bmdma_stop) (struct ata_queued_cmd *qc);
677 u8 (*bmdma_status) (struct ata_port *ap);
680 struct ata_port_info {
681 struct scsi_host_template *sht;
683 unsigned long link_flags;
684 unsigned long pio_mask;
685 unsigned long mwdma_mask;
686 unsigned long udma_mask;
687 const struct ata_port_operations *port_ops;
688 irq_handler_t irq_handler;
693 unsigned short mode; /* ATA mode */
694 unsigned short setup; /* t1 */
695 unsigned short act8b; /* t2 for 8-bit I/O */
696 unsigned short rec8b; /* t2i for 8-bit I/O */
697 unsigned short cyc8b; /* t0 for 8-bit I/O */
698 unsigned short active; /* t2 or tD */
699 unsigned short recover; /* t2i or tK */
700 unsigned short cycle; /* t0 */
701 unsigned short udma; /* t2CYCTYP/2 */
704 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
706 extern const unsigned long sata_deb_timing_normal[];
707 extern const unsigned long sata_deb_timing_hotplug[];
708 extern const unsigned long sata_deb_timing_long[];
710 extern const struct ata_port_operations ata_dummy_port_ops;
711 extern const struct ata_port_info ata_dummy_port_info;
713 static inline const unsigned long *
714 sata_ehc_deb_timing(struct ata_eh_context *ehc)
716 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
717 return sata_deb_timing_hotplug;
719 return sata_deb_timing_normal;
722 static inline int ata_port_is_dummy(struct ata_port *ap)
724 return ap->ops == &ata_dummy_port_ops;
727 extern void sata_print_link_status(struct ata_link *link);
728 extern void ata_port_probe(struct ata_port *);
729 extern void __sata_phy_reset(struct ata_port *ap);
730 extern void sata_phy_reset(struct ata_port *ap);
731 extern void ata_bus_reset(struct ata_port *ap);
732 extern int sata_set_spd(struct ata_link *link);
733 extern int sata_link_debounce(struct ata_link *link,
734 const unsigned long *params, unsigned long deadline);
735 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
736 unsigned long deadline);
737 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
738 extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
739 unsigned long deadline);
740 extern int sata_link_hardreset(struct ata_link *link,
741 const unsigned long *timing, unsigned long deadline);
742 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
743 unsigned long deadline);
744 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
745 extern void ata_port_disable(struct ata_port *);
746 extern void ata_std_ports(struct ata_ioports *ioaddr);
748 extern int ata_pci_init_one (struct pci_dev *pdev,
749 const struct ata_port_info * const * ppi);
750 extern void ata_pci_remove_one (struct pci_dev *pdev);
752 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
753 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
754 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
755 extern int ata_pci_device_resume(struct pci_dev *pdev);
757 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
758 #endif /* CONFIG_PCI */
759 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
760 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
761 const struct ata_port_info * const * ppi, int n_ports);
762 extern int ata_host_start(struct ata_host *host);
763 extern int ata_host_register(struct ata_host *host,
764 struct scsi_host_template *sht);
765 extern int ata_host_activate(struct ata_host *host, int irq,
766 irq_handler_t irq_handler, unsigned long irq_flags,
767 struct scsi_host_template *sht);
768 extern void ata_host_detach(struct ata_host *host);
769 extern void ata_host_init(struct ata_host *, struct device *,
770 unsigned long, const struct ata_port_operations *);
771 extern int ata_scsi_detect(struct scsi_host_template *sht);
772 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
773 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
774 extern void ata_scsi_media_change_notify(struct ata_device *atadev);
775 extern void ata_sas_port_destroy(struct ata_port *);
776 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
777 struct ata_port_info *, struct Scsi_Host *);
778 extern int ata_sas_port_init(struct ata_port *);
779 extern int ata_sas_port_start(struct ata_port *ap);
780 extern void ata_sas_port_stop(struct ata_port *ap);
781 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
782 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
783 struct ata_port *ap);
784 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
785 extern int sata_scr_valid(struct ata_link *link);
786 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
787 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
788 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
789 extern int ata_link_online(struct ata_link *link);
790 extern int ata_link_offline(struct ata_link *link);
792 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
793 extern void ata_host_resume(struct ata_host *host);
795 extern int ata_ratelimit(void);
796 extern int ata_busy_sleep(struct ata_port *ap,
797 unsigned long timeout_pat, unsigned long timeout);
798 extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
799 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
800 void *data, unsigned long delay);
801 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
802 unsigned long interval_msec,
803 unsigned long timeout_msec);
804 extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
808 * Default driver ops implementations
810 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
811 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
812 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
813 u8 pmp, int is_cmd, u8 *fis);
814 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
815 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
816 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
817 extern u8 ata_check_status(struct ata_port *ap);
818 extern u8 ata_altstatus(struct ata_port *ap);
819 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
820 extern int ata_port_start (struct ata_port *ap);
821 extern int ata_sff_port_start (struct ata_port *ap);
822 extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
823 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
824 unsigned int buflen, int write_data);
825 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
826 unsigned int buflen, int write_data);
827 extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
828 extern void ata_qc_prep(struct ata_queued_cmd *qc);
829 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
830 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
831 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
832 unsigned int buflen);
833 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
834 unsigned int n_elem);
835 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
836 extern void ata_dev_disable(struct ata_device *adev);
837 extern void ata_id_string(const u16 *id, unsigned char *s,
838 unsigned int ofs, unsigned int len);
839 extern void ata_id_c_string(const u16 *id, unsigned char *s,
840 unsigned int ofs, unsigned int len);
841 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
842 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
843 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
844 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
845 extern u8 ata_bmdma_status(struct ata_port *ap);
846 extern void ata_bmdma_irq_clear(struct ata_port *ap);
847 extern void ata_bmdma_freeze(struct ata_port *ap);
848 extern void ata_bmdma_thaw(struct ata_port *ap);
849 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
850 ata_reset_fn_t softreset,
851 ata_reset_fn_t hardreset,
852 ata_postreset_fn_t postreset);
853 extern void ata_bmdma_error_handler(struct ata_port *ap);
854 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
855 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
856 u8 status, int in_wq);
857 extern void ata_qc_complete(struct ata_queued_cmd *qc);
858 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
859 void (*finish_qc)(struct ata_queued_cmd *));
860 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
861 void (*done)(struct scsi_cmnd *));
862 extern int ata_std_bios_param(struct scsi_device *sdev,
863 struct block_device *bdev,
864 sector_t capacity, int geom[]);
865 extern int ata_scsi_slave_config(struct scsi_device *sdev);
866 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
867 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
869 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
870 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
871 extern u8 ata_irq_on(struct ata_port *ap);
873 extern int ata_cable_40wire(struct ata_port *ap);
874 extern int ata_cable_80wire(struct ata_port *ap);
875 extern int ata_cable_sata(struct ata_port *ap);
876 extern int ata_cable_unknown(struct ata_port *ap);
882 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
883 extern int ata_timing_compute(struct ata_device *, unsigned short,
884 struct ata_timing *, int, int);
885 extern void ata_timing_merge(const struct ata_timing *,
886 const struct ata_timing *, struct ata_timing *,
890 ATA_TIMING_SETUP = (1 << 0),
891 ATA_TIMING_ACT8B = (1 << 1),
892 ATA_TIMING_REC8B = (1 << 2),
893 ATA_TIMING_CYC8B = (1 << 3),
894 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
896 ATA_TIMING_ACTIVE = (1 << 4),
897 ATA_TIMING_RECOVER = (1 << 5),
898 ATA_TIMING_CYCLE = (1 << 6),
899 ATA_TIMING_UDMA = (1 << 7),
900 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
901 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
902 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
903 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
907 #ifdef CONFIG_ATA_ACPI
908 extern int ata_acpi_cbl_80wire(struct ata_port *ap);
910 static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
915 unsigned int reg; /* PCI config register to read */
916 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
921 extern int ata_pci_init_sff_host(struct ata_host *host);
922 extern int ata_pci_init_bmdma(struct ata_host *host);
923 extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
924 const struct ata_port_info * const * ppi,
925 struct ata_host **r_host);
926 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
927 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
928 #endif /* CONFIG_PCI */
933 extern void ata_eng_timeout(struct ata_port *ap);
935 extern void ata_port_schedule_eh(struct ata_port *ap);
936 extern int ata_link_abort(struct ata_link *link);
937 extern int ata_port_abort(struct ata_port *ap);
938 extern int ata_port_freeze(struct ata_port *ap);
940 extern void ata_eh_freeze_port(struct ata_port *ap);
941 extern void ata_eh_thaw_port(struct ata_port *ap);
943 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
944 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
946 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
947 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
948 ata_postreset_fn_t postreset);
953 #define ata_port_printk(ap, lv, fmt, args...) \
954 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
956 #define ata_link_printk(link, lv, fmt, args...) do { \
957 if ((link)->ap->nr_pmp_links) \
958 printk(lv"ata%u.%02u: "fmt, (link)->ap->print_id, \
959 (link)->pmp , ##args); \
961 printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args); \
964 #define ata_dev_printk(dev, lv, fmt, args...) \
965 printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, \
966 (dev)->link->pmp + (dev)->devno , ##args)
969 * ata_eh_info helpers
971 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
972 __attribute__ ((format (printf, 2, 3)));
973 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
974 __attribute__ ((format (printf, 2, 3)));
975 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
977 static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi)
979 ehi->flags |= ATA_EHI_RESUME_LINK;
980 ehi->action |= ATA_EH_SOFTRESET;
981 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
984 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
986 ata_ehi_schedule_probe(ehi);
987 ehi->flags |= ATA_EHI_HOTPLUGGED;
988 ehi->err_mask |= AC_ERR_ATA_BUS;
992 * port description helpers
994 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
995 __attribute__ ((format (printf, 2, 3)));
997 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1005 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
1007 if (sg == &qc->pad_sgent)
1011 if (((sg - qc->__sg) + 1) == qc->n_elem)
1016 static inline struct scatterlist *
1017 ata_qc_first_sg(struct ata_queued_cmd *qc)
1022 return &qc->pad_sgent;
1026 static inline struct scatterlist *
1027 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
1029 if (sg == &qc->pad_sgent)
1031 if (++sg - qc->__sg < qc->n_elem)
1034 return &qc->pad_sgent;
1038 #define ata_for_each_sg(sg, qc) \
1039 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
1041 static inline unsigned int ata_tag_valid(unsigned int tag)
1043 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1046 static inline unsigned int ata_tag_internal(unsigned int tag)
1048 return tag == ATA_MAX_QUEUE - 1;
1054 static inline unsigned int ata_class_enabled(unsigned int class)
1056 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1057 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1060 static inline unsigned int ata_class_disabled(unsigned int class)
1062 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1063 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1066 static inline unsigned int ata_class_absent(unsigned int class)
1068 return !ata_class_enabled(class) && !ata_class_disabled(class);
1071 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1073 return ata_class_enabled(dev->class);
1076 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1078 return ata_class_disabled(dev->class);
1081 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1083 return ata_class_absent(dev->class);
1089 static inline int ata_is_host_link(const struct ata_link *link)
1091 return link == &link->ap->link;
1094 static inline int ata_link_max_devices(const struct ata_link *link)
1096 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1101 static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1103 if (ap->nr_pmp_links)
1104 return ap->pmp_link;
1108 static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1110 struct ata_port *ap = link->ap;
1112 if (link == &ap->link) {
1113 if (!ap->nr_pmp_links)
1115 return ap->pmp_link;
1118 if (++link - ap->pmp_link < ap->nr_pmp_links)
1123 #define __ata_port_for_each_link(lk, ap) \
1124 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1126 #define ata_port_for_each_link(link, ap) \
1127 for ((link) = ata_port_first_link(ap); (link); \
1128 (link) = ata_port_next_link(link))
1130 #define ata_link_for_each_dev(dev, link) \
1131 for ((dev) = (link)->device; \
1132 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1135 #define ata_link_for_each_dev_reverse(dev, link) \
1136 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1137 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1139 static inline u8 ata_chk_status(struct ata_port *ap)
1141 return ap->ops->check_status(ap);
1145 * ata_ncq_enabled - Test whether NCQ is enabled
1146 * @dev: ATA device to test for
1149 * spin_lock_irqsave(host lock)
1152 * 1 if NCQ is enabled for @dev, 0 otherwise.
1154 static inline int ata_ncq_enabled(struct ata_device *dev)
1156 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1157 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1161 * ata_pause - Flush writes and pause 400 nanoseconds.
1162 * @ap: Port to wait for.
1165 * Inherited from caller.
1168 static inline void ata_pause(struct ata_port *ap)
1176 * ata_busy_wait - Wait for a port status register
1177 * @ap: Port to wait for.
1178 * @bits: bits that must be clear
1179 * @max: number of 10uS waits to perform
1181 * Waits up to max*10 microseconds for the selected bits in the port's
1182 * status register to be cleared.
1183 * Returns final value of status register.
1186 * Inherited from caller.
1189 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1196 status = ata_chk_status(ap);
1198 } while (status != 0xff && (status & bits) && (max > 0));
1205 * ata_wait_idle - Wait for a port to be idle.
1206 * @ap: Port to wait for.
1208 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1209 * Returns final value of status register.
1212 * Inherited from caller.
1215 static inline u8 ata_wait_idle(struct ata_port *ap)
1217 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1220 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1221 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1228 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1230 qc->tf.ctl |= ATA_NIEN;
1233 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1236 if (likely(ata_tag_valid(tag)))
1237 return &ap->qcmd[tag];
1241 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1244 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1246 if (unlikely(!qc) || !ap->ops->error_handler)
1249 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1250 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1256 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1258 memset(tf, 0, sizeof(*tf));
1260 tf->ctl = dev->link->ap->ctl;
1261 if (dev->devno == 0)
1262 tf->device = ATA_DEVICE_OBS;
1264 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1267 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1269 qc->dma_dir = DMA_NONE;
1272 qc->cursg = qc->cursg_ofs = 0;
1273 qc->nbytes = qc->curbytes = 0;
1277 qc->sect_size = ATA_SECT_SIZE;
1279 ata_tf_init(qc->dev, &qc->tf);
1281 /* init result_tf such that it indicates normal completion */
1282 qc->result_tf.command = ATA_DRDY;
1283 qc->result_tf.feature = 0;
1286 static inline int ata_try_flush_cache(const struct ata_device *dev)
1288 return ata_id_wcache_enabled(dev->id) ||
1289 ata_id_has_flush(dev->id) ||
1290 ata_id_has_flush_ext(dev->id);
1293 static inline unsigned int ac_err_mask(u8 status)
1295 if (status & (ATA_BUSY | ATA_DRQ))
1297 if (status & (ATA_ERR | ATA_DF))
1302 static inline unsigned int __ac_err_mask(u8 status)
1304 unsigned int mask = ac_err_mask(status);
1306 return AC_ERR_OTHER;
1310 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1313 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1314 &ap->pad_dma, GFP_KERNEL);
1315 return (ap->pad == NULL) ? -ENOMEM : 0;
1318 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1320 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1323 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1325 return *(struct ata_port **)&host->hostdata[0];
1328 #endif /* __LINUX_LIBATA_H__ */