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/dma-mapping.h>
32 #include <linux/scatterlist.h>
34 #include <linux/ata.h>
35 #include <linux/workqueue.h>
36 #include <scsi/scsi_host.h>
37 #include <linux/acpi.h>
40 * Define if arch has non-standard setup. This is a _PCI_ standard
41 * not a legacy or ISA standard.
43 #ifdef CONFIG_ATA_NONSTANDARD
44 #include <asm/libata-portmap.h>
46 #include <asm-generic/libata-portmap.h>
50 * compile-time options: to be removed as soon as all the drivers are
51 * converted to the new debugging mechanism
53 #undef ATA_DEBUG /* debugging output */
54 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
55 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
56 #undef ATA_NDEBUG /* define to disable quick runtime checks */
59 /* note: prints function name for you */
61 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
62 #ifdef ATA_VERBOSE_DEBUG
63 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65 #define VPRINTK(fmt, args...)
66 #endif /* ATA_VERBOSE_DEBUG */
68 #define DPRINTK(fmt, args...)
69 #define VPRINTK(fmt, args...)
70 #endif /* ATA_DEBUG */
72 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
74 /* NEW: debug levels */
75 #define HAVE_LIBATA_MSG 1
79 ATA_MSG_INFO = 0x0002,
80 ATA_MSG_PROBE = 0x0004,
81 ATA_MSG_WARN = 0x0008,
82 ATA_MSG_MALLOC = 0x0010,
84 ATA_MSG_INTR = 0x0040,
88 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
89 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
90 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
91 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
92 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
93 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
94 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
95 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
97 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
99 if (dval < 0 || dval >= (sizeof(u32) * 8))
100 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 return (1 << dval) - 1;
106 /* defines only for the constants which don't work well as enums */
107 #define ATA_TAG_POISON 0xfafbfcfdU
110 /* various global constants */
111 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
112 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
115 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
117 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
119 ATA_DEF_BUSY_WAIT = 10000,
120 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
122 ATAPI_MAX_DRAIN = 16 << 10,
124 ATA_SHT_EMULATED = 1,
125 ATA_SHT_CMD_PER_LUN = 1,
126 ATA_SHT_THIS_ID = -1,
127 ATA_SHT_USE_CLUSTERING = 1,
129 /* struct ata_device stuff */
130 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
131 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
132 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
133 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
134 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
135 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
136 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
137 ATA_DFLAG_AN = (1 << 7), /* AN configured */
138 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
139 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
140 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
142 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
143 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
144 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
145 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
146 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
147 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
149 ATA_DFLAG_DETACH = (1 << 24),
150 ATA_DFLAG_DETACHED = (1 << 25),
152 ATA_DEV_UNKNOWN = 0, /* unknown device */
153 ATA_DEV_ATA = 1, /* ATA device */
154 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
155 ATA_DEV_ATAPI = 3, /* ATAPI device */
156 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
157 ATA_DEV_PMP = 5, /* SATA port multiplier */
158 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
159 ATA_DEV_SEMB = 7, /* SEMB */
160 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
161 ATA_DEV_NONE = 9, /* no device */
163 /* struct ata_link flags */
164 ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */
165 ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H
166 * Register FIS clearing BSY */
167 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
168 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
169 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
170 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
171 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
172 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
174 /* struct ata_port flags */
175 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
176 /* (doesn't imply presence) */
177 ATA_FLAG_SATA = (1 << 1),
178 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
179 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
180 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
181 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
182 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
183 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
184 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
185 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
186 * doesn't handle PIO interrupts */
187 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
188 ATA_FLAG_DEBUGMSG = (1 << 13),
189 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
190 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
191 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
192 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
193 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
194 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
196 /* The following flag belongs to ap->pflags but is kept in
197 * ap->flags because it's referenced in many LLDs and will be
198 * removed in not-too-distant future.
200 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
202 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
204 /* struct ata_port pflags */
205 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
206 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
207 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
208 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
209 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
210 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
211 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
212 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
213 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
215 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
216 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
217 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
219 /* struct ata_queued_cmd flags */
220 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
221 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
222 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
223 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
224 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
225 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
226 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
227 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
229 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
230 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
231 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
234 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
235 ATA_HOST_STARTED = (1 << 1), /* Host started */
237 /* bits 24:31 of host->flags are reserved for LLD specific flags */
239 /* various lengths of time */
240 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
241 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
242 ATA_TMOUT_INTERNAL = 30 * HZ,
243 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
245 /* FIXME: GoVault needs 2s but we can't afford that without
246 * parallel probing. 800ms is enough for iVDR disk
247 * HHD424020F7SV00. Increase to 2secs when parallel probing
250 ATA_TMOUT_FF_WAIT = 4 * HZ / 5,
264 /* SATA port states */
269 /* encoding various smaller bitmaps into a single
270 * unsigned int bitmap
277 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
278 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
280 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
281 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
282 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
284 /* size of buffer to pad xfers ending on unaligned boundaries */
286 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
291 /* return values for ->qc_defer */
295 /* desc_len for ata_eh_info and context */
296 ATA_EH_DESC_LEN = 80,
298 /* reset / recovery action types */
299 ATA_EH_REVALIDATE = (1 << 0),
300 ATA_EH_SOFTRESET = (1 << 1),
301 ATA_EH_HARDRESET = (1 << 2),
302 ATA_EH_ENABLE_LINK = (1 << 3),
304 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
305 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
307 /* ata_eh_info->flags */
308 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
309 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
310 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
311 ATA_EHI_QUIET = (1 << 3), /* be quiet */
312 ATA_EHI_LPM = (1 << 4), /* link power management action */
314 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
315 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
316 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
317 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
318 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
320 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
321 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
323 /* max tries if error condition is still set after ->error_handler */
324 ATA_EH_MAX_TRIES = 5,
326 /* how hard are we gonna try to probe/recover devices */
327 ATA_PROBE_MAX_TRIES = 3,
328 ATA_EH_DEV_TRIES = 3,
329 ATA_EH_PMP_TRIES = 5,
330 ATA_EH_PMP_LINK_TRIES = 3,
332 SATA_PMP_SCR_TIMEOUT = 250,
334 /* Horkage types. May be set by libata or controller on drives
335 (some horkage may be drive/controller pair dependant */
337 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
338 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
339 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
340 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
341 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
342 ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */
343 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
344 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
345 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
346 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
348 /* DMA mask for user DMA control: User visible values; DO NOT
350 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
351 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
352 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
355 enum hsm_task_states {
356 HSM_ST_IDLE, /* no command on going */
357 HSM_ST_FIRST, /* (waiting the device to)
358 write CDB or first data block */
359 HSM_ST, /* (waiting the device to) transfer data */
360 HSM_ST_LAST, /* (waiting the device to) complete command */
361 HSM_ST_ERR, /* error */
364 enum ata_completion_errors {
365 AC_ERR_DEV = (1 << 0), /* device reported error */
366 AC_ERR_HSM = (1 << 1), /* host state machine violation */
367 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
368 AC_ERR_MEDIA = (1 << 3), /* media error */
369 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
370 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
371 AC_ERR_SYSTEM = (1 << 6), /* system error */
372 AC_ERR_INVALID = (1 << 7), /* invalid argument */
373 AC_ERR_OTHER = (1 << 8), /* unknown */
374 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
375 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
378 /* forward declarations */
380 struct ata_port_operations;
383 struct ata_queued_cmd;
386 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
387 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
388 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
389 unsigned long deadline);
390 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
393 * host pm policy: If you alter this, you also need to alter libata-scsi.c
394 * (for the ascii descriptions)
402 extern struct class_device_attribute class_device_attr_link_power_management_policy;
405 void __iomem *cmd_addr;
406 void __iomem *data_addr;
407 void __iomem *error_addr;
408 void __iomem *feature_addr;
409 void __iomem *nsect_addr;
410 void __iomem *lbal_addr;
411 void __iomem *lbam_addr;
412 void __iomem *lbah_addr;
413 void __iomem *device_addr;
414 void __iomem *status_addr;
415 void __iomem *command_addr;
416 void __iomem *altstatus_addr;
417 void __iomem *ctl_addr;
418 void __iomem *bmdma_addr;
419 void __iomem *scr_addr;
425 void __iomem * const *iomap;
426 unsigned int n_ports;
428 const struct ata_port_operations *ops;
430 #ifdef CONFIG_ATA_ACPI
431 acpi_handle acpi_handle;
433 struct ata_port *simplex_claimed; /* channel owning the DMA */
434 struct ata_port *ports[0];
437 struct ata_queued_cmd {
439 struct ata_device *dev;
441 struct scsi_cmnd *scsicmd;
442 void (*scsidone)(struct scsi_cmnd *);
444 struct ata_taskfile tf;
445 u8 cdb[ATAPI_CDB_LEN];
447 unsigned long flags; /* ATA_QCFLAG_xxx */
451 unsigned int orig_n_elem;
455 unsigned int pad_len;
456 unsigned int sect_size;
459 unsigned int curbytes;
461 struct scatterlist *cursg;
462 unsigned int cursg_ofs;
464 struct scatterlist sgent;
465 struct scatterlist pad_sgent;
468 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
469 struct scatterlist *__sg;
471 unsigned int err_mask;
472 struct ata_taskfile result_tf;
473 ata_qc_cb_t complete_fn;
479 struct ata_port_stats {
480 unsigned long unhandled_irq;
481 unsigned long idle_irq;
482 unsigned long rw_reqbuf;
485 struct ata_ering_entry {
487 unsigned int err_mask;
493 struct ata_ering_entry ring[ATA_ERING_SIZE];
497 struct ata_link *link;
498 unsigned int devno; /* 0 or 1 */
499 unsigned long flags; /* ATA_DFLAG_xxx */
500 unsigned int horkage; /* List of broken features */
501 struct scsi_device *sdev; /* attached SCSI device */
502 #ifdef CONFIG_ATA_ACPI
503 acpi_handle acpi_handle;
504 union acpi_object *gtf_cache;
506 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
507 u64 n_sectors; /* size of device, if ATA */
508 unsigned int class; /* ATA_DEV_xxx */
511 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
512 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
518 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
520 unsigned int multi_count; /* sectors count for
521 READ/WRITE MULTIPLE */
522 unsigned int max_sectors; /* per-device max sectors */
523 unsigned int cdb_len;
525 /* per-dev xfer mask */
526 unsigned int pio_mask;
527 unsigned int mwdma_mask;
528 unsigned int udma_mask;
530 /* for CHS addressing */
531 u16 cylinders; /* Number of cylinders */
532 u16 heads; /* Number of heads */
533 u16 sectors; /* Number of sectors per track */
536 struct ata_ering ering;
540 /* Offset into struct ata_device. Fields above it are maintained
541 * acress device init. Fields below are zeroed.
543 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
546 struct ata_device *dev; /* offending device */
547 u32 serror; /* SError from LLDD */
548 unsigned int err_mask; /* port-wide err_mask */
549 unsigned int action; /* ATA_EH_* action mask */
550 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
551 unsigned int flags; /* ATA_EHI_* flags */
553 unsigned int probe_mask;
555 char desc[ATA_EH_DESC_LEN];
559 struct ata_eh_context {
560 struct ata_eh_info i;
561 int tries[ATA_MAX_DEVICES];
562 unsigned int classes[ATA_MAX_DEVICES];
563 unsigned int did_probe_mask;
564 unsigned int saved_ncq_enabled;
565 u8 saved_xfer_mode[ATA_MAX_DEVICES];
568 struct ata_acpi_drive
574 struct ata_acpi_gtm {
575 struct ata_acpi_drive drive[2];
581 int pmp; /* port multiplier port # */
583 unsigned int active_tag; /* active tag on this link */
584 u32 sactive; /* active NCQ commands */
586 unsigned int flags; /* ATA_LFLAG_xxx */
588 unsigned int hw_sata_spd_limit;
589 unsigned int sata_spd_limit;
590 unsigned int sata_spd; /* current SATA PHY speed */
592 /* record runtime error info, protected by host_set lock */
593 struct ata_eh_info eh_info;
595 struct ata_eh_context eh_context;
597 struct ata_device device[ATA_MAX_DEVICES];
601 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
602 const struct ata_port_operations *ops;
604 unsigned long flags; /* ATA_FLAG_xxx */
605 unsigned int pflags; /* ATA_PFLAG_xxx */
606 unsigned int print_id; /* user visible unique port ID */
607 unsigned int port_no; /* 0 based port no. inside the host */
609 struct ata_prd *prd; /* our SG list */
610 dma_addr_t prd_dma; /* and its DMA mapping */
612 void *pad; /* array of DMA pad buffers */
615 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
617 u8 ctl; /* cache of ATA control register */
618 u8 last_ctl; /* Cache last written value */
619 unsigned int pio_mask;
620 unsigned int mwdma_mask;
621 unsigned int udma_mask;
622 unsigned int cbl; /* cable type; ATA_CBL_xxx */
624 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
625 unsigned long qc_allocated;
626 unsigned int qc_active;
627 int nr_active_links; /* #links with active qcs */
629 struct ata_link link; /* host default link */
631 int nr_pmp_links; /* nr of available PMP links */
632 struct ata_link *pmp_link; /* array of PMP links */
633 struct ata_link *excl_link; /* for PMP qc exclusion */
635 struct ata_port_stats stats;
636 struct ata_host *host;
639 void *port_task_data;
640 struct delayed_work port_task;
641 struct delayed_work hotplug_task;
642 struct work_struct scsi_rescan_task;
644 unsigned int hsm_task_state;
647 struct list_head eh_done_q;
648 wait_queue_head_t eh_wait_q;
651 pm_message_t pm_mesg;
653 enum link_pm pm_policy;
655 struct timer_list fastdrain_timer;
656 unsigned long fastdrain_cnt;
660 #ifdef CONFIG_ATA_ACPI
661 acpi_handle acpi_handle;
662 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
664 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
667 struct ata_port_operations {
668 void (*dev_config) (struct ata_device *);
670 void (*set_piomode) (struct ata_port *, struct ata_device *);
671 void (*set_dmamode) (struct ata_port *, struct ata_device *);
672 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
674 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
675 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
677 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
678 u8 (*check_status)(struct ata_port *ap);
679 u8 (*check_altstatus)(struct ata_port *ap);
680 void (*dev_select)(struct ata_port *ap, unsigned int device);
682 void (*phy_reset) (struct ata_port *ap); /* obsolete */
683 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
685 int (*cable_detect) (struct ata_port *ap);
687 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
689 void (*bmdma_setup) (struct ata_queued_cmd *qc);
690 void (*bmdma_start) (struct ata_queued_cmd *qc);
692 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
694 int (*qc_defer) (struct ata_queued_cmd *qc);
695 void (*qc_prep) (struct ata_queued_cmd *qc);
696 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
698 /* port multiplier */
699 void (*pmp_attach) (struct ata_port *ap);
700 void (*pmp_detach) (struct ata_port *ap);
702 /* Error handlers. ->error_handler overrides ->eng_timeout and
703 * indicates that new-style EH is in place.
705 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
707 void (*freeze) (struct ata_port *ap);
708 void (*thaw) (struct ata_port *ap);
709 void (*error_handler) (struct ata_port *ap);
710 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
712 irq_handler_t irq_handler;
713 void (*irq_clear) (struct ata_port *);
714 u8 (*irq_on) (struct ata_port *);
716 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
717 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
719 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
720 int (*port_resume) (struct ata_port *ap);
721 int (*enable_pm) (struct ata_port *ap, enum link_pm policy);
722 void (*disable_pm) (struct ata_port *ap);
723 int (*port_start) (struct ata_port *ap);
724 void (*port_stop) (struct ata_port *ap);
726 void (*host_stop) (struct ata_host *host);
728 void (*bmdma_stop) (struct ata_queued_cmd *qc);
729 u8 (*bmdma_status) (struct ata_port *ap);
732 struct ata_port_info {
733 struct scsi_host_template *sht;
735 unsigned long link_flags;
736 unsigned long pio_mask;
737 unsigned long mwdma_mask;
738 unsigned long udma_mask;
739 const struct ata_port_operations *port_ops;
740 irq_handler_t irq_handler;
745 unsigned short mode; /* ATA mode */
746 unsigned short setup; /* t1 */
747 unsigned short act8b; /* t2 for 8-bit I/O */
748 unsigned short rec8b; /* t2i for 8-bit I/O */
749 unsigned short cyc8b; /* t0 for 8-bit I/O */
750 unsigned short active; /* t2 or tD */
751 unsigned short recover; /* t2i or tK */
752 unsigned short cycle; /* t0 */
753 unsigned short udma; /* t2CYCTYP/2 */
756 #define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
758 extern const unsigned long sata_deb_timing_normal[];
759 extern const unsigned long sata_deb_timing_hotplug[];
760 extern const unsigned long sata_deb_timing_long[];
762 extern const struct ata_port_operations ata_dummy_port_ops;
763 extern const struct ata_port_info ata_dummy_port_info;
765 static inline const unsigned long *
766 sata_ehc_deb_timing(struct ata_eh_context *ehc)
768 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
769 return sata_deb_timing_hotplug;
771 return sata_deb_timing_normal;
774 static inline int ata_port_is_dummy(struct ata_port *ap)
776 return ap->ops == &ata_dummy_port_ops;
779 extern void sata_print_link_status(struct ata_link *link);
780 extern void ata_port_probe(struct ata_port *);
781 extern void ata_bus_reset(struct ata_port *ap);
782 extern int sata_set_spd(struct ata_link *link);
783 extern int sata_link_debounce(struct ata_link *link,
784 const unsigned long *params, unsigned long deadline);
785 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
786 unsigned long deadline);
787 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
788 extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
789 unsigned long deadline);
790 extern int sata_link_hardreset(struct ata_link *link,
791 const unsigned long *timing, unsigned long deadline);
792 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
793 unsigned long deadline);
794 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
795 extern void ata_port_disable(struct ata_port *);
796 extern void ata_std_ports(struct ata_ioports *ioaddr);
798 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
799 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
800 const struct ata_port_info * const * ppi, int n_ports);
801 extern int ata_host_start(struct ata_host *host);
802 extern int ata_host_register(struct ata_host *host,
803 struct scsi_host_template *sht);
804 extern int ata_host_activate(struct ata_host *host, int irq,
805 irq_handler_t irq_handler, unsigned long irq_flags,
806 struct scsi_host_template *sht);
807 extern void ata_host_detach(struct ata_host *host);
808 extern void ata_host_init(struct ata_host *, struct device *,
809 unsigned long, const struct ata_port_operations *);
810 extern int ata_scsi_detect(struct scsi_host_template *sht);
811 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
812 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
813 extern void ata_sas_port_destroy(struct ata_port *);
814 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
815 struct ata_port_info *, struct Scsi_Host *);
816 extern int ata_sas_port_init(struct ata_port *);
817 extern int ata_sas_port_start(struct ata_port *ap);
818 extern void ata_sas_port_stop(struct ata_port *ap);
819 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
820 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
821 struct ata_port *ap);
822 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
823 extern int sata_scr_valid(struct ata_link *link);
824 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
825 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
826 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
827 extern int ata_link_online(struct ata_link *link);
828 extern int ata_link_offline(struct ata_link *link);
830 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
831 extern void ata_host_resume(struct ata_host *host);
833 extern int ata_ratelimit(void);
834 extern int ata_busy_sleep(struct ata_port *ap,
835 unsigned long timeout_pat, unsigned long timeout);
836 extern void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline);
837 extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
838 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
839 void *data, unsigned long delay);
840 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
841 unsigned long interval_msec,
842 unsigned long timeout_msec);
843 extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
847 * Default driver ops implementations
849 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
850 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
851 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
852 u8 pmp, int is_cmd, u8 *fis);
853 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
854 extern unsigned int ata_pack_xfermask(unsigned int pio_mask,
855 unsigned int mwdma_mask, unsigned int udma_mask);
856 extern void ata_unpack_xfermask(unsigned int xfer_mask, unsigned int *pio_mask,
857 unsigned int *mwdma_mask, unsigned int *udma_mask);
858 extern u8 ata_xfer_mask2mode(unsigned int xfer_mask);
859 extern unsigned int ata_xfer_mode2mask(u8 xfer_mode);
860 extern int ata_xfer_mode2shift(unsigned int xfer_mode);
861 extern const char *ata_mode_string(unsigned int xfer_mask);
862 extern unsigned int ata_id_xfermask(const u16 *id);
863 extern void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
864 extern void ata_std_dev_select(struct ata_port *ap, unsigned int device);
865 extern u8 ata_check_status(struct ata_port *ap);
866 extern u8 ata_altstatus(struct ata_port *ap);
867 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
868 extern int ata_port_start(struct ata_port *ap);
869 extern int ata_sff_port_start(struct ata_port *ap);
870 extern irqreturn_t ata_interrupt(int irq, void *dev_instance);
871 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
872 unsigned int buflen, int write_data);
873 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
874 unsigned int buflen, int write_data);
875 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
876 extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
877 extern void ata_qc_prep(struct ata_queued_cmd *qc);
878 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
879 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
880 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
881 unsigned int buflen);
882 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
883 unsigned int n_elem);
884 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
885 extern void ata_dev_disable(struct ata_device *adev);
886 extern void ata_id_string(const u16 *id, unsigned char *s,
887 unsigned int ofs, unsigned int len);
888 extern void ata_id_c_string(const u16 *id, unsigned char *s,
889 unsigned int ofs, unsigned int len);
890 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
891 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
892 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
893 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
894 extern u8 ata_bmdma_status(struct ata_port *ap);
895 extern void ata_bmdma_irq_clear(struct ata_port *ap);
896 extern void ata_bmdma_freeze(struct ata_port *ap);
897 extern void ata_bmdma_thaw(struct ata_port *ap);
898 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
899 ata_reset_fn_t softreset,
900 ata_reset_fn_t hardreset,
901 ata_postreset_fn_t postreset);
902 extern void ata_bmdma_error_handler(struct ata_port *ap);
903 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
904 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
905 u8 status, int in_wq);
906 extern void ata_qc_complete(struct ata_queued_cmd *qc);
907 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
908 void (*finish_qc)(struct ata_queued_cmd *));
909 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
910 void (*done)(struct scsi_cmnd *));
911 extern int ata_std_bios_param(struct scsi_device *sdev,
912 struct block_device *bdev,
913 sector_t capacity, int geom[]);
914 extern int ata_scsi_slave_config(struct scsi_device *sdev);
915 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
916 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
918 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
919 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
920 extern u8 ata_irq_on(struct ata_port *ap);
922 extern int ata_cable_40wire(struct ata_port *ap);
923 extern int ata_cable_80wire(struct ata_port *ap);
924 extern int ata_cable_sata(struct ata_port *ap);
925 extern int ata_cable_unknown(struct ata_port *ap);
931 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
932 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
933 extern int ata_timing_compute(struct ata_device *, unsigned short,
934 struct ata_timing *, int, int);
935 extern void ata_timing_merge(const struct ata_timing *,
936 const struct ata_timing *, struct ata_timing *,
940 ATA_TIMING_SETUP = (1 << 0),
941 ATA_TIMING_ACT8B = (1 << 1),
942 ATA_TIMING_REC8B = (1 << 2),
943 ATA_TIMING_CYC8B = (1 << 3),
944 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
946 ATA_TIMING_ACTIVE = (1 << 4),
947 ATA_TIMING_RECOVER = (1 << 5),
948 ATA_TIMING_CYCLE = (1 << 6),
949 ATA_TIMING_UDMA = (1 << 7),
950 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
951 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
952 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
953 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
957 #ifdef CONFIG_ATA_ACPI
958 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
960 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
961 return &ap->__acpi_init_gtm;
964 extern int ata_acpi_cbl_80wire(struct ata_port *ap);
965 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
966 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
968 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
972 static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
978 extern int ata_pci_init_one(struct pci_dev *pdev,
979 const struct ata_port_info * const * ppi);
980 extern void ata_pci_remove_one(struct pci_dev *pdev);
982 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
983 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
984 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
985 extern int ata_pci_device_resume(struct pci_dev *pdev);
987 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
990 unsigned int reg; /* PCI config register to read */
991 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
996 extern int ata_pci_init_sff_host(struct ata_host *host);
997 extern int ata_pci_init_bmdma(struct ata_host *host);
998 extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
999 const struct ata_port_info * const * ppi,
1000 struct ata_host **r_host);
1001 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1002 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
1003 #endif /* CONFIG_PCI */
1008 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1009 extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
1010 extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
1011 unsigned long deadline);
1012 extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class);
1013 extern void sata_pmp_do_eh(struct ata_port *ap,
1014 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
1015 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset,
1016 ata_prereset_fn_t pmp_prereset, ata_reset_fn_t pmp_softreset,
1017 ata_reset_fn_t pmp_hardreset, ata_postreset_fn_t pmp_postreset);
1022 extern void ata_port_schedule_eh(struct ata_port *ap);
1023 extern int ata_link_abort(struct ata_link *link);
1024 extern int ata_port_abort(struct ata_port *ap);
1025 extern int ata_port_freeze(struct ata_port *ap);
1026 extern int sata_async_notification(struct ata_port *ap);
1028 extern void ata_eh_freeze_port(struct ata_port *ap);
1029 extern void ata_eh_thaw_port(struct ata_port *ap);
1031 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1032 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1034 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1035 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1036 ata_postreset_fn_t postreset);
1041 #define ata_port_printk(ap, lv, fmt, args...) \
1042 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1044 #define ata_link_printk(link, lv, fmt, args...) do { \
1045 if ((link)->ap->nr_pmp_links) \
1046 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1047 (link)->pmp , ##args); \
1049 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1052 #define ata_dev_printk(dev, lv, fmt, args...) \
1053 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1054 (dev)->link->pmp + (dev)->devno , ##args)
1057 * ata_eh_info helpers
1059 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1060 __attribute__ ((format (printf, 2, 3)));
1061 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1062 __attribute__ ((format (printf, 2, 3)));
1063 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1065 static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi)
1067 ehi->flags |= ATA_EHI_RESUME_LINK;
1068 ehi->action |= ATA_EH_SOFTRESET;
1069 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1072 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1074 ata_ehi_schedule_probe(ehi);
1075 ehi->flags |= ATA_EHI_HOTPLUGGED;
1076 ehi->action |= ATA_EH_ENABLE_LINK;
1077 ehi->err_mask |= AC_ERR_ATA_BUS;
1081 * port description helpers
1083 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1084 __attribute__ ((format (printf, 2, 3)));
1086 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1093 static inline struct scatterlist *
1094 ata_qc_first_sg(struct ata_queued_cmd *qc)
1100 return &qc->pad_sgent;
1104 static inline struct scatterlist *
1105 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
1107 if (sg == &qc->pad_sgent)
1109 if (++qc->n_iter < qc->n_elem)
1112 return &qc->pad_sgent;
1116 #define ata_for_each_sg(sg, qc) \
1117 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
1119 static inline unsigned int ata_tag_valid(unsigned int tag)
1121 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1124 static inline unsigned int ata_tag_internal(unsigned int tag)
1126 return tag == ATA_MAX_QUEUE - 1;
1132 static inline unsigned int ata_class_enabled(unsigned int class)
1134 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1135 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1138 static inline unsigned int ata_class_disabled(unsigned int class)
1140 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1141 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1144 static inline unsigned int ata_class_absent(unsigned int class)
1146 return !ata_class_enabled(class) && !ata_class_disabled(class);
1149 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1151 return ata_class_enabled(dev->class);
1154 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1156 return ata_class_disabled(dev->class);
1159 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1161 return ata_class_absent(dev->class);
1167 static inline int ata_is_host_link(const struct ata_link *link)
1169 return link == &link->ap->link;
1172 static inline int ata_link_max_devices(const struct ata_link *link)
1174 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1179 static inline int ata_link_active(struct ata_link *link)
1181 return ata_tag_valid(link->active_tag) || link->sactive;
1184 static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1186 if (ap->nr_pmp_links)
1187 return ap->pmp_link;
1191 static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1193 struct ata_port *ap = link->ap;
1195 if (link == &ap->link) {
1196 if (!ap->nr_pmp_links)
1198 return ap->pmp_link;
1201 if (++link - ap->pmp_link < ap->nr_pmp_links)
1206 #define __ata_port_for_each_link(lk, ap) \
1207 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1209 #define ata_port_for_each_link(link, ap) \
1210 for ((link) = ata_port_first_link(ap); (link); \
1211 (link) = ata_port_next_link(link))
1213 #define ata_link_for_each_dev(dev, link) \
1214 for ((dev) = (link)->device; \
1215 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1218 #define ata_link_for_each_dev_reverse(dev, link) \
1219 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1220 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1222 static inline u8 ata_chk_status(struct ata_port *ap)
1224 return ap->ops->check_status(ap);
1228 * ata_ncq_enabled - Test whether NCQ is enabled
1229 * @dev: ATA device to test for
1232 * spin_lock_irqsave(host lock)
1235 * 1 if NCQ is enabled for @dev, 0 otherwise.
1237 static inline int ata_ncq_enabled(struct ata_device *dev)
1239 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1240 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1244 * ata_pause - Flush writes and pause 400 nanoseconds.
1245 * @ap: Port to wait for.
1248 * Inherited from caller.
1251 static inline void ata_pause(struct ata_port *ap)
1259 * ata_busy_wait - Wait for a port status register
1260 * @ap: Port to wait for.
1261 * @bits: bits that must be clear
1262 * @max: number of 10uS waits to perform
1264 * Waits up to max*10 microseconds for the selected bits in the port's
1265 * status register to be cleared.
1266 * Returns final value of status register.
1269 * Inherited from caller.
1272 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1279 status = ata_chk_status(ap);
1281 } while (status != 0xff && (status & bits) && (max > 0));
1288 * ata_wait_idle - Wait for a port to be idle.
1289 * @ap: Port to wait for.
1291 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1292 * Returns final value of status register.
1295 * Inherited from caller.
1298 static inline u8 ata_wait_idle(struct ata_port *ap)
1300 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1303 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1304 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1311 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1313 qc->tf.ctl |= ATA_NIEN;
1316 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1319 if (likely(ata_tag_valid(tag)))
1320 return &ap->qcmd[tag];
1324 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1327 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1329 if (unlikely(!qc) || !ap->ops->error_handler)
1332 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1333 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1339 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1341 memset(tf, 0, sizeof(*tf));
1343 tf->ctl = dev->link->ap->ctl;
1344 if (dev->devno == 0)
1345 tf->device = ATA_DEVICE_OBS;
1347 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1350 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1352 qc->dma_dir = DMA_NONE;
1357 qc->nbytes = qc->curbytes = 0;
1362 qc->sect_size = ATA_SECT_SIZE;
1364 ata_tf_init(qc->dev, &qc->tf);
1366 /* init result_tf such that it indicates normal completion */
1367 qc->result_tf.command = ATA_DRDY;
1368 qc->result_tf.feature = 0;
1371 static inline int ata_try_flush_cache(const struct ata_device *dev)
1373 return ata_id_wcache_enabled(dev->id) ||
1374 ata_id_has_flush(dev->id) ||
1375 ata_id_has_flush_ext(dev->id);
1378 static inline unsigned int ac_err_mask(u8 status)
1380 if (status & (ATA_BUSY | ATA_DRQ))
1382 if (status & (ATA_ERR | ATA_DF))
1387 static inline unsigned int __ac_err_mask(u8 status)
1389 unsigned int mask = ac_err_mask(status);
1391 return AC_ERR_OTHER;
1395 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1398 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1399 &ap->pad_dma, GFP_KERNEL);
1400 return (ap->pad == NULL) ? -ENOMEM : 0;
1403 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1405 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1408 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1410 return *(struct ata_port **)&host->hostdata[0];
1413 #endif /* __LINUX_LIBATA_H__ */