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>
38 #include <linux/cdrom.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
111 /* various global constants */
112 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
113 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
120 ATA_DEF_BUSY_WAIT = 10000,
121 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
123 ATAPI_MAX_DRAIN = 16 << 10,
125 ATA_SHT_EMULATED = 1,
126 ATA_SHT_CMD_PER_LUN = 1,
127 ATA_SHT_THIS_ID = -1,
128 ATA_SHT_USE_CLUSTERING = 1,
130 /* struct ata_device stuff */
131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
138 ATA_DFLAG_AN = (1 << 7), /* AN configured */
139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
141 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
143 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
144 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
145 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
148 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
150 ATA_DFLAG_DETACH = (1 << 24),
151 ATA_DFLAG_DETACHED = (1 << 25),
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 */
168 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
169 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
170 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
171 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
175 /* struct ata_port flags */
176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
177 /* (doesn't imply presence) */
178 ATA_FLAG_SATA = (1 << 1),
179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
187 * doesn't handle PIO interrupts */
188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
189 ATA_FLAG_DEBUGMSG = (1 << 13),
190 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
191 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
192 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
193 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
194 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
195 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
197 /* The following flag belongs to ap->pflags but is kept in
198 * ap->flags because it's referenced in many LLDs and will be
199 * removed in not-too-distant future.
201 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
203 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
205 /* struct ata_port pflags */
206 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
207 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
208 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
209 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
210 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
211 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
212 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
213 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
214 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
216 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
217 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
218 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
220 /* struct ata_queued_cmd flags */
221 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
222 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
223 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
224 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
225 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
226 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
227 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
228 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
230 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
231 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
232 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
235 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
236 ATA_HOST_STARTED = (1 << 1), /* Host started */
238 /* bits 24:31 of host->flags are reserved for LLD specific flags */
240 /* various lengths of time */
241 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
242 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
243 ATA_TMOUT_INTERNAL = 30 * HZ,
244 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
246 /* FIXME: GoVault needs 2s but we can't afford that without
247 * parallel probing. 800ms is enough for iVDR disk
248 * HHD424020F7SV00. Increase to 2secs when parallel probing
251 ATA_TMOUT_FF_WAIT = 4 * HZ / 5,
265 /* SATA port states */
270 /* encoding various smaller bitmaps into a single
271 * unsigned long bitmap
273 ATA_NR_PIO_MODES = 7,
274 ATA_NR_MWDMA_MODES = 5,
275 ATA_NR_UDMA_MODES = 8,
278 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
279 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
281 /* size of buffer to pad xfers ending on unaligned boundaries */
283 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
288 /* return values for ->qc_defer */
292 /* desc_len for ata_eh_info and context */
293 ATA_EH_DESC_LEN = 80,
295 /* reset / recovery action types */
296 ATA_EH_REVALIDATE = (1 << 0),
297 ATA_EH_SOFTRESET = (1 << 1),
298 ATA_EH_HARDRESET = (1 << 2),
299 ATA_EH_ENABLE_LINK = (1 << 3),
301 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
302 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
304 /* ata_eh_info->flags */
305 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
306 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
307 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
308 ATA_EHI_QUIET = (1 << 3), /* be quiet */
309 ATA_EHI_LPM = (1 << 4), /* link power management action */
311 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
312 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
313 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
314 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
315 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
317 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
318 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
320 /* max tries if error condition is still set after ->error_handler */
321 ATA_EH_MAX_TRIES = 5,
323 /* how hard are we gonna try to probe/recover devices */
324 ATA_PROBE_MAX_TRIES = 3,
325 ATA_EH_DEV_TRIES = 3,
326 ATA_EH_PMP_TRIES = 5,
327 ATA_EH_PMP_LINK_TRIES = 3,
329 SATA_PMP_SCR_TIMEOUT = 250,
331 /* Horkage types. May be set by libata or controller on drives
332 (some horkage may be drive/controller pair dependant */
334 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
335 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
336 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
337 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
338 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
339 ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */
340 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
341 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
342 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
343 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
345 /* DMA mask for user DMA control: User visible values; DO NOT
347 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
348 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
349 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
351 /* ATAPI command types */
352 ATAPI_READ = 0, /* READs */
353 ATAPI_WRITE = 1, /* WRITEs */
354 ATAPI_READ_CD = 2, /* READ CD [MSF] */
355 ATAPI_MISC = 3, /* the rest */
359 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
361 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
363 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
367 enum hsm_task_states {
368 HSM_ST_IDLE, /* no command on going */
369 HSM_ST_FIRST, /* (waiting the device to)
370 write CDB or first data block */
371 HSM_ST, /* (waiting the device to) transfer data */
372 HSM_ST_LAST, /* (waiting the device to) complete command */
373 HSM_ST_ERR, /* error */
376 enum ata_completion_errors {
377 AC_ERR_DEV = (1 << 0), /* device reported error */
378 AC_ERR_HSM = (1 << 1), /* host state machine violation */
379 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
380 AC_ERR_MEDIA = (1 << 3), /* media error */
381 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
382 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
383 AC_ERR_SYSTEM = (1 << 6), /* system error */
384 AC_ERR_INVALID = (1 << 7), /* invalid argument */
385 AC_ERR_OTHER = (1 << 8), /* unknown */
386 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
387 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
390 /* forward declarations */
392 struct ata_port_operations;
395 struct ata_queued_cmd;
398 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
399 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
400 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
401 unsigned long deadline);
402 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
405 * host pm policy: If you alter this, you also need to alter libata-scsi.c
406 * (for the ascii descriptions)
414 extern struct class_device_attribute class_device_attr_link_power_management_policy;
417 void __iomem *cmd_addr;
418 void __iomem *data_addr;
419 void __iomem *error_addr;
420 void __iomem *feature_addr;
421 void __iomem *nsect_addr;
422 void __iomem *lbal_addr;
423 void __iomem *lbam_addr;
424 void __iomem *lbah_addr;
425 void __iomem *device_addr;
426 void __iomem *status_addr;
427 void __iomem *command_addr;
428 void __iomem *altstatus_addr;
429 void __iomem *ctl_addr;
430 void __iomem *bmdma_addr;
431 void __iomem *scr_addr;
437 void __iomem * const *iomap;
438 unsigned int n_ports;
440 const struct ata_port_operations *ops;
442 #ifdef CONFIG_ATA_ACPI
443 acpi_handle acpi_handle;
445 struct ata_port *simplex_claimed; /* channel owning the DMA */
446 struct ata_port *ports[0];
449 struct ata_queued_cmd {
451 struct ata_device *dev;
453 struct scsi_cmnd *scsicmd;
454 void (*scsidone)(struct scsi_cmnd *);
456 struct ata_taskfile tf;
457 u8 cdb[ATAPI_CDB_LEN];
459 unsigned long flags; /* ATA_QCFLAG_xxx */
463 unsigned int orig_n_elem;
467 unsigned int pad_len;
468 unsigned int sect_size;
471 unsigned int curbytes;
473 struct scatterlist *cursg;
474 unsigned int cursg_ofs;
476 struct scatterlist sgent;
477 struct scatterlist pad_sgent;
480 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
481 struct scatterlist *__sg;
483 unsigned int err_mask;
484 struct ata_taskfile result_tf;
485 ata_qc_cb_t complete_fn;
491 struct ata_port_stats {
492 unsigned long unhandled_irq;
493 unsigned long idle_irq;
494 unsigned long rw_reqbuf;
497 struct ata_ering_entry {
499 unsigned int err_mask;
505 struct ata_ering_entry ring[ATA_ERING_SIZE];
509 struct ata_link *link;
510 unsigned int devno; /* 0 or 1 */
511 unsigned long flags; /* ATA_DFLAG_xxx */
512 unsigned int horkage; /* List of broken features */
513 struct scsi_device *sdev; /* attached SCSI device */
514 #ifdef CONFIG_ATA_ACPI
515 acpi_handle acpi_handle;
516 union acpi_object *gtf_cache;
518 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
519 u64 n_sectors; /* size of device, if ATA */
520 unsigned int class; /* ATA_DEV_xxx */
523 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
524 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
530 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
532 unsigned int multi_count; /* sectors count for
533 READ/WRITE MULTIPLE */
534 unsigned int max_sectors; /* per-device max sectors */
535 unsigned int cdb_len;
537 /* per-dev xfer mask */
538 unsigned long pio_mask;
539 unsigned long mwdma_mask;
540 unsigned long udma_mask;
542 /* for CHS addressing */
543 u16 cylinders; /* Number of cylinders */
544 u16 heads; /* Number of heads */
545 u16 sectors; /* Number of sectors per track */
548 struct ata_ering ering;
552 /* Offset into struct ata_device. Fields above it are maintained
553 * acress device init. Fields below are zeroed.
555 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
558 struct ata_device *dev; /* offending device */
559 u32 serror; /* SError from LLDD */
560 unsigned int err_mask; /* port-wide err_mask */
561 unsigned int action; /* ATA_EH_* action mask */
562 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
563 unsigned int flags; /* ATA_EHI_* flags */
565 unsigned int probe_mask;
567 char desc[ATA_EH_DESC_LEN];
571 struct ata_eh_context {
572 struct ata_eh_info i;
573 int tries[ATA_MAX_DEVICES];
574 unsigned int classes[ATA_MAX_DEVICES];
575 unsigned int did_probe_mask;
576 unsigned int saved_ncq_enabled;
577 u8 saved_xfer_mode[ATA_MAX_DEVICES];
580 struct ata_acpi_drive
586 struct ata_acpi_gtm {
587 struct ata_acpi_drive drive[2];
593 int pmp; /* port multiplier port # */
595 unsigned int active_tag; /* active tag on this link */
596 u32 sactive; /* active NCQ commands */
598 unsigned int flags; /* ATA_LFLAG_xxx */
600 unsigned int hw_sata_spd_limit;
601 unsigned int sata_spd_limit;
602 unsigned int sata_spd; /* current SATA PHY speed */
604 /* record runtime error info, protected by host_set lock */
605 struct ata_eh_info eh_info;
607 struct ata_eh_context eh_context;
609 struct ata_device device[ATA_MAX_DEVICES];
613 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
614 const struct ata_port_operations *ops;
616 unsigned long flags; /* ATA_FLAG_xxx */
617 unsigned int pflags; /* ATA_PFLAG_xxx */
618 unsigned int print_id; /* user visible unique port ID */
619 unsigned int port_no; /* 0 based port no. inside the host */
621 struct ata_prd *prd; /* our SG list */
622 dma_addr_t prd_dma; /* and its DMA mapping */
624 void *pad; /* array of DMA pad buffers */
627 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
629 u8 ctl; /* cache of ATA control register */
630 u8 last_ctl; /* Cache last written value */
631 unsigned int pio_mask;
632 unsigned int mwdma_mask;
633 unsigned int udma_mask;
634 unsigned int cbl; /* cable type; ATA_CBL_xxx */
636 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
637 unsigned long qc_allocated;
638 unsigned int qc_active;
639 int nr_active_links; /* #links with active qcs */
641 struct ata_link link; /* host default link */
643 int nr_pmp_links; /* nr of available PMP links */
644 struct ata_link *pmp_link; /* array of PMP links */
645 struct ata_link *excl_link; /* for PMP qc exclusion */
647 struct ata_port_stats stats;
648 struct ata_host *host;
651 void *port_task_data;
652 struct delayed_work port_task;
653 struct delayed_work hotplug_task;
654 struct work_struct scsi_rescan_task;
656 unsigned int hsm_task_state;
659 struct list_head eh_done_q;
660 wait_queue_head_t eh_wait_q;
663 pm_message_t pm_mesg;
665 enum link_pm pm_policy;
667 struct timer_list fastdrain_timer;
668 unsigned long fastdrain_cnt;
672 #ifdef CONFIG_ATA_ACPI
673 acpi_handle acpi_handle;
674 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
676 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
679 struct ata_port_operations {
680 void (*dev_config) (struct ata_device *);
682 void (*set_piomode) (struct ata_port *, struct ata_device *);
683 void (*set_dmamode) (struct ata_port *, struct ata_device *);
684 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
686 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
687 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
689 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
690 u8 (*check_status)(struct ata_port *ap);
691 u8 (*check_altstatus)(struct ata_port *ap);
692 void (*dev_select)(struct ata_port *ap, unsigned int device);
694 void (*phy_reset) (struct ata_port *ap); /* obsolete */
695 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
697 int (*cable_detect) (struct ata_port *ap);
699 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
701 void (*bmdma_setup) (struct ata_queued_cmd *qc);
702 void (*bmdma_start) (struct ata_queued_cmd *qc);
704 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
706 int (*qc_defer) (struct ata_queued_cmd *qc);
707 void (*qc_prep) (struct ata_queued_cmd *qc);
708 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
710 /* port multiplier */
711 void (*pmp_attach) (struct ata_port *ap);
712 void (*pmp_detach) (struct ata_port *ap);
714 /* Error handlers. ->error_handler overrides ->eng_timeout and
715 * indicates that new-style EH is in place.
717 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
719 void (*freeze) (struct ata_port *ap);
720 void (*thaw) (struct ata_port *ap);
721 void (*error_handler) (struct ata_port *ap);
722 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
724 irq_handler_t irq_handler;
725 void (*irq_clear) (struct ata_port *);
726 u8 (*irq_on) (struct ata_port *);
728 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
729 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
731 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
732 int (*port_resume) (struct ata_port *ap);
733 int (*enable_pm) (struct ata_port *ap, enum link_pm policy);
734 void (*disable_pm) (struct ata_port *ap);
735 int (*port_start) (struct ata_port *ap);
736 void (*port_stop) (struct ata_port *ap);
738 void (*host_stop) (struct ata_host *host);
740 void (*bmdma_stop) (struct ata_queued_cmd *qc);
741 u8 (*bmdma_status) (struct ata_port *ap);
744 struct ata_port_info {
745 struct scsi_host_template *sht;
747 unsigned long link_flags;
748 unsigned long pio_mask;
749 unsigned long mwdma_mask;
750 unsigned long udma_mask;
751 const struct ata_port_operations *port_ops;
752 irq_handler_t irq_handler;
757 unsigned short mode; /* ATA mode */
758 unsigned short setup; /* t1 */
759 unsigned short act8b; /* t2 for 8-bit I/O */
760 unsigned short rec8b; /* t2i for 8-bit I/O */
761 unsigned short cyc8b; /* t0 for 8-bit I/O */
762 unsigned short active; /* t2 or tD */
763 unsigned short recover; /* t2i or tK */
764 unsigned short cycle; /* t0 */
765 unsigned short udma; /* t2CYCTYP/2 */
768 #define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
770 extern const unsigned long sata_deb_timing_normal[];
771 extern const unsigned long sata_deb_timing_hotplug[];
772 extern const unsigned long sata_deb_timing_long[];
774 extern const struct ata_port_operations ata_dummy_port_ops;
775 extern const struct ata_port_info ata_dummy_port_info;
777 static inline const unsigned long *
778 sata_ehc_deb_timing(struct ata_eh_context *ehc)
780 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
781 return sata_deb_timing_hotplug;
783 return sata_deb_timing_normal;
786 static inline int ata_port_is_dummy(struct ata_port *ap)
788 return ap->ops == &ata_dummy_port_ops;
791 extern void sata_print_link_status(struct ata_link *link);
792 extern void ata_port_probe(struct ata_port *);
793 extern void ata_bus_reset(struct ata_port *ap);
794 extern int sata_set_spd(struct ata_link *link);
795 extern int sata_link_debounce(struct ata_link *link,
796 const unsigned long *params, unsigned long deadline);
797 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
798 unsigned long deadline);
799 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
800 extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
801 unsigned long deadline);
802 extern int sata_link_hardreset(struct ata_link *link,
803 const unsigned long *timing, unsigned long deadline);
804 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
805 unsigned long deadline);
806 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
807 extern void ata_port_disable(struct ata_port *);
808 extern void ata_std_ports(struct ata_ioports *ioaddr);
810 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
811 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
812 const struct ata_port_info * const * ppi, int n_ports);
813 extern int ata_host_start(struct ata_host *host);
814 extern int ata_host_register(struct ata_host *host,
815 struct scsi_host_template *sht);
816 extern int ata_host_activate(struct ata_host *host, int irq,
817 irq_handler_t irq_handler, unsigned long irq_flags,
818 struct scsi_host_template *sht);
819 extern void ata_host_detach(struct ata_host *host);
820 extern void ata_host_init(struct ata_host *, struct device *,
821 unsigned long, const struct ata_port_operations *);
822 extern int ata_scsi_detect(struct scsi_host_template *sht);
823 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
824 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
825 extern void ata_sas_port_destroy(struct ata_port *);
826 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
827 struct ata_port_info *, struct Scsi_Host *);
828 extern int ata_sas_port_init(struct ata_port *);
829 extern int ata_sas_port_start(struct ata_port *ap);
830 extern void ata_sas_port_stop(struct ata_port *ap);
831 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
832 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
833 struct ata_port *ap);
834 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
835 extern int sata_scr_valid(struct ata_link *link);
836 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
837 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
838 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
839 extern int ata_link_online(struct ata_link *link);
840 extern int ata_link_offline(struct ata_link *link);
842 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
843 extern void ata_host_resume(struct ata_host *host);
845 extern int ata_ratelimit(void);
846 extern int ata_busy_sleep(struct ata_port *ap,
847 unsigned long timeout_pat, unsigned long timeout);
848 extern void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline);
849 extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
850 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
851 void *data, unsigned long delay);
852 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
853 unsigned long interval_msec,
854 unsigned long timeout_msec);
855 extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
859 * Default driver ops implementations
861 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
862 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
863 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
864 u8 pmp, int is_cmd, u8 *fis);
865 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
866 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
867 unsigned long mwdma_mask, unsigned long udma_mask);
868 extern void ata_unpack_xfermask(unsigned long xfer_mask,
869 unsigned long *pio_mask, unsigned long *mwdma_mask,
870 unsigned long *udma_mask);
871 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
872 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
873 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
874 extern const char *ata_mode_string(unsigned long xfer_mask);
875 extern unsigned long ata_id_xfermask(const u16 *id);
876 extern void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
877 extern void ata_std_dev_select(struct ata_port *ap, unsigned int device);
878 extern u8 ata_check_status(struct ata_port *ap);
879 extern u8 ata_altstatus(struct ata_port *ap);
880 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
881 extern int ata_port_start(struct ata_port *ap);
882 extern int ata_sff_port_start(struct ata_port *ap);
883 extern irqreturn_t ata_interrupt(int irq, void *dev_instance);
884 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
885 unsigned int buflen, int write_data);
886 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
887 unsigned int buflen, int write_data);
888 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
889 extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
890 extern void ata_qc_prep(struct ata_queued_cmd *qc);
891 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
892 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
893 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
894 unsigned int buflen);
895 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
896 unsigned int n_elem);
897 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
898 extern void ata_dev_disable(struct ata_device *adev);
899 extern void ata_id_string(const u16 *id, unsigned char *s,
900 unsigned int ofs, unsigned int len);
901 extern void ata_id_c_string(const u16 *id, unsigned char *s,
902 unsigned int ofs, unsigned int len);
903 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
904 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
905 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
906 extern u8 ata_bmdma_status(struct ata_port *ap);
907 extern void ata_bmdma_irq_clear(struct ata_port *ap);
908 extern void ata_bmdma_freeze(struct ata_port *ap);
909 extern void ata_bmdma_thaw(struct ata_port *ap);
910 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
911 ata_reset_fn_t softreset,
912 ata_reset_fn_t hardreset,
913 ata_postreset_fn_t postreset);
914 extern void ata_bmdma_error_handler(struct ata_port *ap);
915 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
916 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
917 u8 status, int in_wq);
918 extern void ata_qc_complete(struct ata_queued_cmd *qc);
919 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
920 void (*finish_qc)(struct ata_queued_cmd *));
921 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
922 void (*done)(struct scsi_cmnd *));
923 extern int ata_std_bios_param(struct scsi_device *sdev,
924 struct block_device *bdev,
925 sector_t capacity, int geom[]);
926 extern int ata_scsi_slave_config(struct scsi_device *sdev);
927 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
928 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
930 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
931 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
932 extern u8 ata_irq_on(struct ata_port *ap);
934 extern int ata_cable_40wire(struct ata_port *ap);
935 extern int ata_cable_80wire(struct ata_port *ap);
936 extern int ata_cable_sata(struct ata_port *ap);
937 extern int ata_cable_ignore(struct ata_port *ap);
938 extern int ata_cable_unknown(struct ata_port *ap);
944 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
945 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
946 extern int ata_timing_compute(struct ata_device *, unsigned short,
947 struct ata_timing *, int, int);
948 extern void ata_timing_merge(const struct ata_timing *,
949 const struct ata_timing *, struct ata_timing *,
951 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
954 ATA_TIMING_SETUP = (1 << 0),
955 ATA_TIMING_ACT8B = (1 << 1),
956 ATA_TIMING_REC8B = (1 << 2),
957 ATA_TIMING_CYC8B = (1 << 3),
958 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
960 ATA_TIMING_ACTIVE = (1 << 4),
961 ATA_TIMING_RECOVER = (1 << 5),
962 ATA_TIMING_CYCLE = (1 << 6),
963 ATA_TIMING_UDMA = (1 << 7),
964 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
965 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
966 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
967 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
971 #ifdef CONFIG_ATA_ACPI
972 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
974 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
975 return &ap->__acpi_init_gtm;
978 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
979 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
980 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
981 const struct ata_acpi_gtm *gtm);
982 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
984 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
989 static inline int ata_acpi_stm(const struct ata_port *ap,
990 struct ata_acpi_gtm *stm)
995 static inline int ata_acpi_gtm(const struct ata_port *ap,
996 struct ata_acpi_gtm *stm)
1001 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1002 const struct ata_acpi_gtm *gtm)
1007 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1008 const struct ata_acpi_gtm *gtm)
1017 extern int ata_pci_init_one(struct pci_dev *pdev,
1018 const struct ata_port_info * const * ppi);
1019 extern void ata_pci_remove_one(struct pci_dev *pdev);
1021 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1022 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1023 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1024 extern int ata_pci_device_resume(struct pci_dev *pdev);
1026 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
1029 unsigned int reg; /* PCI config register to read */
1030 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1035 extern int ata_pci_init_sff_host(struct ata_host *host);
1036 extern int ata_pci_init_bmdma(struct ata_host *host);
1037 extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
1038 const struct ata_port_info * const * ppi,
1039 struct ata_host **r_host);
1040 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1041 extern unsigned long ata_pci_default_filter(struct ata_device *dev,
1042 unsigned long xfer_mask);
1043 #endif /* CONFIG_PCI */
1048 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1049 extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
1050 extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
1051 unsigned long deadline);
1052 extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class);
1053 extern void sata_pmp_do_eh(struct ata_port *ap,
1054 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
1055 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset,
1056 ata_prereset_fn_t pmp_prereset, ata_reset_fn_t pmp_softreset,
1057 ata_reset_fn_t pmp_hardreset, ata_postreset_fn_t pmp_postreset);
1062 extern void ata_port_schedule_eh(struct ata_port *ap);
1063 extern int ata_link_abort(struct ata_link *link);
1064 extern int ata_port_abort(struct ata_port *ap);
1065 extern int ata_port_freeze(struct ata_port *ap);
1066 extern int sata_async_notification(struct ata_port *ap);
1068 extern void ata_eh_freeze_port(struct ata_port *ap);
1069 extern void ata_eh_thaw_port(struct ata_port *ap);
1071 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1072 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1074 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1075 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1076 ata_postreset_fn_t postreset);
1081 #define ata_port_printk(ap, lv, fmt, args...) \
1082 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1084 #define ata_link_printk(link, lv, fmt, args...) do { \
1085 if ((link)->ap->nr_pmp_links) \
1086 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1087 (link)->pmp , ##args); \
1089 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1092 #define ata_dev_printk(dev, lv, fmt, args...) \
1093 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1094 (dev)->link->pmp + (dev)->devno , ##args)
1097 * ata_eh_info helpers
1099 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1100 __attribute__ ((format (printf, 2, 3)));
1101 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1102 __attribute__ ((format (printf, 2, 3)));
1103 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1105 static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi)
1107 ehi->flags |= ATA_EHI_RESUME_LINK;
1108 ehi->action |= ATA_EH_SOFTRESET;
1109 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1112 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1114 ata_ehi_schedule_probe(ehi);
1115 ehi->flags |= ATA_EHI_HOTPLUGGED;
1116 ehi->action |= ATA_EH_ENABLE_LINK;
1117 ehi->err_mask |= AC_ERR_ATA_BUS;
1121 * port description helpers
1123 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1124 __attribute__ ((format (printf, 2, 3)));
1126 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1133 static inline struct scatterlist *
1134 ata_qc_first_sg(struct ata_queued_cmd *qc)
1140 return &qc->pad_sgent;
1144 static inline struct scatterlist *
1145 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
1147 if (sg == &qc->pad_sgent)
1149 if (++qc->n_iter < qc->n_elem)
1152 return &qc->pad_sgent;
1156 #define ata_for_each_sg(sg, qc) \
1157 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
1159 static inline unsigned int ata_tag_valid(unsigned int tag)
1161 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1164 static inline unsigned int ata_tag_internal(unsigned int tag)
1166 return tag == ATA_MAX_QUEUE - 1;
1172 static inline unsigned int ata_class_enabled(unsigned int class)
1174 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1175 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1178 static inline unsigned int ata_class_disabled(unsigned int class)
1180 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1181 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1184 static inline unsigned int ata_class_absent(unsigned int class)
1186 return !ata_class_enabled(class) && !ata_class_disabled(class);
1189 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1191 return ata_class_enabled(dev->class);
1194 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1196 return ata_class_disabled(dev->class);
1199 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1201 return ata_class_absent(dev->class);
1207 static inline int ata_is_host_link(const struct ata_link *link)
1209 return link == &link->ap->link;
1212 static inline int ata_link_max_devices(const struct ata_link *link)
1214 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1219 static inline int ata_link_active(struct ata_link *link)
1221 return ata_tag_valid(link->active_tag) || link->sactive;
1224 static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1226 if (ap->nr_pmp_links)
1227 return ap->pmp_link;
1231 static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1233 struct ata_port *ap = link->ap;
1235 if (link == &ap->link) {
1236 if (!ap->nr_pmp_links)
1238 return ap->pmp_link;
1241 if (++link - ap->pmp_link < ap->nr_pmp_links)
1246 #define __ata_port_for_each_link(lk, ap) \
1247 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1249 #define ata_port_for_each_link(link, ap) \
1250 for ((link) = ata_port_first_link(ap); (link); \
1251 (link) = ata_port_next_link(link))
1253 #define ata_link_for_each_dev(dev, link) \
1254 for ((dev) = (link)->device; \
1255 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1258 #define ata_link_for_each_dev_reverse(dev, link) \
1259 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1260 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1262 static inline u8 ata_chk_status(struct ata_port *ap)
1264 return ap->ops->check_status(ap);
1268 * ata_ncq_enabled - Test whether NCQ is enabled
1269 * @dev: ATA device to test for
1272 * spin_lock_irqsave(host lock)
1275 * 1 if NCQ is enabled for @dev, 0 otherwise.
1277 static inline int ata_ncq_enabled(struct ata_device *dev)
1279 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1280 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1284 * ata_pause - Flush writes and pause 400 nanoseconds.
1285 * @ap: Port to wait for.
1288 * Inherited from caller.
1291 static inline void ata_pause(struct ata_port *ap)
1299 * ata_busy_wait - Wait for a port status register
1300 * @ap: Port to wait for.
1301 * @bits: bits that must be clear
1302 * @max: number of 10uS waits to perform
1304 * Waits up to max*10 microseconds for the selected bits in the port's
1305 * status register to be cleared.
1306 * Returns final value of status register.
1309 * Inherited from caller.
1312 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1319 status = ata_chk_status(ap);
1321 } while (status != 0xff && (status & bits) && (max > 0));
1328 * ata_wait_idle - Wait for a port to be idle.
1329 * @ap: Port to wait for.
1331 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1332 * Returns final value of status register.
1335 * Inherited from caller.
1338 static inline u8 ata_wait_idle(struct ata_port *ap)
1340 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1343 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1344 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1351 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1353 qc->tf.ctl |= ATA_NIEN;
1356 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1359 if (likely(ata_tag_valid(tag)))
1360 return &ap->qcmd[tag];
1364 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1367 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1369 if (unlikely(!qc) || !ap->ops->error_handler)
1372 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1373 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1379 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1381 memset(tf, 0, sizeof(*tf));
1383 tf->ctl = dev->link->ap->ctl;
1384 if (dev->devno == 0)
1385 tf->device = ATA_DEVICE_OBS;
1387 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1390 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1392 qc->dma_dir = DMA_NONE;
1397 qc->nbytes = qc->curbytes = 0;
1402 qc->sect_size = ATA_SECT_SIZE;
1404 ata_tf_init(qc->dev, &qc->tf);
1406 /* init result_tf such that it indicates normal completion */
1407 qc->result_tf.command = ATA_DRDY;
1408 qc->result_tf.feature = 0;
1411 static inline int ata_try_flush_cache(const struct ata_device *dev)
1413 return ata_id_wcache_enabled(dev->id) ||
1414 ata_id_has_flush(dev->id) ||
1415 ata_id_has_flush_ext(dev->id);
1418 static inline int atapi_cmd_type(u8 opcode)
1425 case GPCMD_WRITE_10:
1426 case GPCMD_WRITE_12:
1427 case GPCMD_WRITE_AND_VERIFY_10:
1431 case GPCMD_READ_CD_MSF:
1432 return ATAPI_READ_CD;
1439 static inline unsigned int ac_err_mask(u8 status)
1441 if (status & (ATA_BUSY | ATA_DRQ))
1443 if (status & (ATA_ERR | ATA_DF))
1448 static inline unsigned int __ac_err_mask(u8 status)
1450 unsigned int mask = ac_err_mask(status);
1452 return AC_ERR_OTHER;
1456 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1459 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1460 &ap->pad_dma, GFP_KERNEL);
1461 return (ap->pad == NULL) ? -ENOMEM : 0;
1464 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1466 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1469 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1471 return *(struct ata_port **)&host->hostdata[0];
1474 #endif /* __LINUX_LIBATA_H__ */