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/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
42 * Define if arch has non-standard setup. This is a _PCI_ standard
43 * not a legacy or ISA standard.
45 #ifdef CONFIG_ATA_NONSTANDARD
46 #include <asm/libata-portmap.h>
48 #include <asm-generic/libata-portmap.h>
52 * compile-time options: to be removed as soon as all the drivers are
53 * converted to the new debugging mechanism
55 #undef ATA_DEBUG /* debugging output */
56 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
57 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
58 #undef ATA_NDEBUG /* define to disable quick runtime checks */
61 /* note: prints function name for you */
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
67 #define VPRINTK(fmt, args...)
68 #endif /* ATA_VERBOSE_DEBUG */
70 #define DPRINTK(fmt, args...)
71 #define VPRINTK(fmt, args...)
72 #endif /* ATA_DEBUG */
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
86 ATA_MSG_INTR = 0x0040,
90 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
99 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
105 return (1 << dval) - 1;
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
112 /* various global constants */
113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
114 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,
119 ATA_SHORT_PAUSE = 16,
121 ATAPI_MAX_DRAIN = 16 << 10,
123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
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_DMADIR = (1 << 10), /* device requires DMADIR */
142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
147 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
148 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
149 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
152 ATA_DFLAG_DETACH = (1 << 24),
153 ATA_DFLAG_DETACHED = (1 << 25),
155 ATA_DEV_UNKNOWN = 0, /* unknown device */
156 ATA_DEV_ATA = 1, /* ATA device */
157 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
158 ATA_DEV_ATAPI = 3, /* ATAPI device */
159 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
160 ATA_DEV_PMP = 5, /* SATA port multiplier */
161 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
162 ATA_DEV_SEMB = 7, /* SEMB */
163 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
164 ATA_DEV_NONE = 9, /* no device */
166 /* struct ata_link flags */
167 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
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 */
174 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
176 /* struct ata_port flags */
177 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
178 /* (doesn't imply presence) */
179 ATA_FLAG_SATA = (1 << 1),
180 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
181 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
182 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
183 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
184 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
185 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
186 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
187 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
188 * doesn't handle PIO interrupts */
189 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
190 ATA_FLAG_DEBUGMSG = (1 << 13),
191 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
192 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
193 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
194 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
195 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
196 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
197 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
199 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
202 /* The following flag belongs to ap->pflags but is kept in
203 * ap->flags because it's referenced in many LLDs and will be
204 * removed in not-too-distant future.
206 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
208 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
210 /* struct ata_port pflags */
211 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
212 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
213 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
214 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
215 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
216 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
217 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
218 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
219 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
220 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
222 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
223 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
224 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
226 /* struct ata_queued_cmd flags */
227 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
228 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
229 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
230 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
231 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
232 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
233 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
235 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
236 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
237 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
240 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
241 ATA_HOST_STARTED = (1 << 1), /* Host started */
242 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
244 /* bits 24:31 of host->flags are reserved for LLD specific flags */
246 /* various lengths of time */
247 ATA_TMOUT_BOOT = 30000, /* heuristic */
248 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
249 ATA_TMOUT_INTERNAL_QUICK = 5000,
250 ATA_TMOUT_MAX_PARK = 30000,
252 /* FIXME: GoVault needs 2s but we can't afford that without
253 * parallel probing. 800ms is enough for iVDR disk
254 * HHD424020F7SV00. Increase to 2secs when parallel probing
257 ATA_TMOUT_FF_WAIT = 800,
259 /* Spec mandates to wait for ">= 2ms" before checking status
260 * after reset. We wait 150ms, because that was the magic
261 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
262 * the period of time between when the ATA command register is
263 * written, and then status is checked. Because waiting for
264 * "a while" before checking status is fine, post SRST, we
265 * perform this magic delay here as well.
267 * Old drivers/ide uses the 2mS rule and then waits for ready.
269 ATA_WAIT_AFTER_RESET = 150,
271 /* If PMP is supported, we have to do follow-up SRST. As some
272 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
273 * advised to wait only for the following duration before
276 ATA_TMOUT_PMP_SRST_WAIT = 1000,
290 /* SATA port states */
295 /* encoding various smaller bitmaps into a single
296 * unsigned long bitmap
298 ATA_NR_PIO_MODES = 7,
299 ATA_NR_MWDMA_MODES = 5,
300 ATA_NR_UDMA_MODES = 8,
303 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
304 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
306 /* size of buffer to pad xfers ending on unaligned boundaries */
312 /* return values for ->qc_defer */
316 /* desc_len for ata_eh_info and context */
317 ATA_EH_DESC_LEN = 80,
319 /* reset / recovery action types */
320 ATA_EH_REVALIDATE = (1 << 0),
321 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
322 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
323 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
324 ATA_EH_ENABLE_LINK = (1 << 3),
325 ATA_EH_LPM = (1 << 4), /* link power management action */
326 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
328 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
329 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
330 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
332 /* ata_eh_info->flags */
333 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
334 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
335 ATA_EHI_QUIET = (1 << 3), /* be quiet */
337 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
338 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
339 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
340 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
341 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
343 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
345 /* mask of flags to transfer *to* the slave link */
346 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
348 /* max tries if error condition is still set after ->error_handler */
349 ATA_EH_MAX_TRIES = 5,
351 /* how hard are we gonna try to probe/recover devices */
352 ATA_PROBE_MAX_TRIES = 3,
353 ATA_EH_DEV_TRIES = 3,
354 ATA_EH_PMP_TRIES = 5,
355 ATA_EH_PMP_LINK_TRIES = 3,
357 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
359 /* This should match the actual table size of
360 * ata_eh_cmd_timeout_table in libata-eh.c.
362 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
364 /* Horkage types. May be set by libata or controller on drives
365 (some horkage may be drive/controller pair dependant */
367 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
368 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
369 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
370 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
371 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
372 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
373 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
374 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
375 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
376 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
377 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
378 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
379 not multiple of 16 bytes */
380 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firwmare update warning */
382 /* DMA mask for user DMA control: User visible values; DO NOT
384 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
385 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
386 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
388 /* ATAPI command types */
389 ATAPI_READ = 0, /* READs */
390 ATAPI_WRITE = 1, /* WRITEs */
391 ATAPI_READ_CD = 2, /* READ CD [MSF] */
392 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
393 ATAPI_MISC = 4, /* the rest */
395 /* Timing constants */
396 ATA_TIMING_SETUP = (1 << 0),
397 ATA_TIMING_ACT8B = (1 << 1),
398 ATA_TIMING_REC8B = (1 << 2),
399 ATA_TIMING_CYC8B = (1 << 3),
400 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
402 ATA_TIMING_ACTIVE = (1 << 4),
403 ATA_TIMING_RECOVER = (1 << 5),
404 ATA_TIMING_CYCLE = (1 << 6),
405 ATA_TIMING_UDMA = (1 << 7),
406 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
407 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
408 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
409 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
413 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
415 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
417 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
421 enum hsm_task_states {
422 HSM_ST_IDLE, /* no command on going */
423 HSM_ST_FIRST, /* (waiting the device to)
424 write CDB or first data block */
425 HSM_ST, /* (waiting the device to) transfer data */
426 HSM_ST_LAST, /* (waiting the device to) complete command */
427 HSM_ST_ERR, /* error */
430 enum ata_completion_errors {
431 AC_ERR_DEV = (1 << 0), /* device reported error */
432 AC_ERR_HSM = (1 << 1), /* host state machine violation */
433 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
434 AC_ERR_MEDIA = (1 << 3), /* media error */
435 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
436 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
437 AC_ERR_SYSTEM = (1 << 6), /* system error */
438 AC_ERR_INVALID = (1 << 7), /* invalid argument */
439 AC_ERR_OTHER = (1 << 8), /* unknown */
440 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
441 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
444 /* forward declarations */
446 struct ata_port_operations;
449 struct ata_queued_cmd;
452 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
453 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
454 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
455 unsigned long deadline);
456 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
459 * host pm policy: If you alter this, you also need to alter libata-scsi.c
460 * (for the ascii descriptions)
468 extern struct device_attribute dev_attr_link_power_management_policy;
469 extern struct device_attribute dev_attr_unload_heads;
470 extern struct device_attribute dev_attr_em_message_type;
471 extern struct device_attribute dev_attr_em_message;
472 extern struct device_attribute dev_attr_sw_activity;
480 #ifdef CONFIG_ATA_SFF
482 void __iomem *cmd_addr;
483 void __iomem *data_addr;
484 void __iomem *error_addr;
485 void __iomem *feature_addr;
486 void __iomem *nsect_addr;
487 void __iomem *lbal_addr;
488 void __iomem *lbam_addr;
489 void __iomem *lbah_addr;
490 void __iomem *device_addr;
491 void __iomem *status_addr;
492 void __iomem *command_addr;
493 void __iomem *altstatus_addr;
494 void __iomem *ctl_addr;
495 void __iomem *bmdma_addr;
496 void __iomem *scr_addr;
498 #endif /* CONFIG_ATA_SFF */
503 void __iomem * const *iomap;
504 unsigned int n_ports;
506 struct ata_port_operations *ops;
508 #ifdef CONFIG_ATA_ACPI
509 acpi_handle acpi_handle;
511 struct ata_port *simplex_claimed; /* channel owning the DMA */
512 struct ata_port *ports[0];
515 struct ata_queued_cmd {
517 struct ata_device *dev;
519 struct scsi_cmnd *scsicmd;
520 void (*scsidone)(struct scsi_cmnd *);
522 struct ata_taskfile tf;
523 u8 cdb[ATAPI_CDB_LEN];
525 unsigned long flags; /* ATA_QCFLAG_xxx */
531 unsigned int sect_size;
534 unsigned int extrabytes;
535 unsigned int curbytes;
537 struct scatterlist *cursg;
538 unsigned int cursg_ofs;
540 struct scatterlist sgent;
542 struct scatterlist *sg;
544 unsigned int err_mask;
545 struct ata_taskfile result_tf;
546 ata_qc_cb_t complete_fn;
552 struct ata_port_stats {
553 unsigned long unhandled_irq;
554 unsigned long idle_irq;
555 unsigned long rw_reqbuf;
558 struct ata_ering_entry {
560 unsigned int err_mask;
566 struct ata_ering_entry ring[ATA_ERING_SIZE];
570 struct ata_link *link;
571 unsigned int devno; /* 0 or 1 */
572 unsigned int horkage; /* List of broken features */
573 unsigned long flags; /* ATA_DFLAG_xxx */
574 struct scsi_device *sdev; /* attached SCSI device */
575 #ifdef CONFIG_ATA_ACPI
576 acpi_handle acpi_handle;
577 union acpi_object *gtf_cache;
579 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
580 u64 n_sectors; /* size of device, if ATA */
581 unsigned int class; /* ATA_DEV_xxx */
582 unsigned long unpark_deadline;
587 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
589 unsigned int multi_count; /* sectors count for
590 READ/WRITE MULTIPLE */
591 unsigned int max_sectors; /* per-device max sectors */
592 unsigned int cdb_len;
594 /* per-dev xfer mask */
595 unsigned long pio_mask;
596 unsigned long mwdma_mask;
597 unsigned long udma_mask;
599 /* for CHS addressing */
600 u16 cylinders; /* Number of cylinders */
601 u16 heads; /* Number of heads */
602 u16 sectors; /* Number of sectors per track */
606 struct ata_ering ering;
609 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
610 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
614 /* Offset into struct ata_device. Fields above it are maintained
615 * acress device init. Fields below are zeroed.
617 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
620 struct ata_device *dev; /* offending device */
621 u32 serror; /* SError from LLDD */
622 unsigned int err_mask; /* port-wide err_mask */
623 unsigned int action; /* ATA_EH_* action mask */
624 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
625 unsigned int flags; /* ATA_EHI_* flags */
627 unsigned int probe_mask;
629 char desc[ATA_EH_DESC_LEN];
633 struct ata_eh_context {
634 struct ata_eh_info i;
635 int tries[ATA_MAX_DEVICES];
636 int cmd_timeout_idx[ATA_MAX_DEVICES]
637 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
638 unsigned int classes[ATA_MAX_DEVICES];
639 unsigned int did_probe_mask;
640 unsigned int unloaded_mask;
641 unsigned int saved_ncq_enabled;
642 u8 saved_xfer_mode[ATA_MAX_DEVICES];
643 /* timestamp for the last reset attempt or success */
644 unsigned long last_reset;
647 struct ata_acpi_drive
653 struct ata_acpi_gtm {
654 struct ata_acpi_drive drive[2];
660 int pmp; /* port multiplier port # */
662 unsigned int active_tag; /* active tag on this link */
663 u32 sactive; /* active NCQ commands */
665 unsigned int flags; /* ATA_LFLAG_xxx */
667 u32 saved_scontrol; /* SControl on probe */
668 unsigned int hw_sata_spd_limit;
669 unsigned int sata_spd_limit;
670 unsigned int sata_spd; /* current SATA PHY speed */
672 /* record runtime error info, protected by host_set lock */
673 struct ata_eh_info eh_info;
675 struct ata_eh_context eh_context;
677 struct ata_device device[ATA_MAX_DEVICES];
681 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
682 struct ata_port_operations *ops;
684 unsigned long flags; /* ATA_FLAG_xxx */
685 unsigned int pflags; /* ATA_PFLAG_xxx */
686 unsigned int print_id; /* user visible unique port ID */
687 unsigned int port_no; /* 0 based port no. inside the host */
689 struct ata_prd *prd; /* our SG list */
690 dma_addr_t prd_dma; /* and its DMA mapping */
692 #ifdef CONFIG_ATA_SFF
693 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
694 #endif /* CONFIG_ATA_SFF */
696 u8 ctl; /* cache of ATA control register */
697 u8 last_ctl; /* Cache last written value */
698 unsigned int pio_mask;
699 unsigned int mwdma_mask;
700 unsigned int udma_mask;
701 unsigned int cbl; /* cable type; ATA_CBL_xxx */
703 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
704 unsigned long qc_allocated;
705 unsigned int qc_active;
706 int nr_active_links; /* #links with active qcs */
708 struct ata_link link; /* host default link */
709 struct ata_link *slave_link; /* see ata_slave_link_init() */
711 int nr_pmp_links; /* nr of available PMP links */
712 struct ata_link *pmp_link; /* array of PMP links */
713 struct ata_link *excl_link; /* for PMP qc exclusion */
715 struct ata_port_stats stats;
716 struct ata_host *host;
719 void *port_task_data;
720 struct delayed_work port_task;
721 struct delayed_work hotplug_task;
722 struct work_struct scsi_rescan_task;
724 unsigned int hsm_task_state;
727 struct list_head eh_done_q;
728 wait_queue_head_t eh_wait_q;
730 struct completion park_req_pending;
732 pm_message_t pm_mesg;
734 enum link_pm pm_policy;
736 struct timer_list fastdrain_timer;
737 unsigned long fastdrain_cnt;
742 #ifdef CONFIG_ATA_ACPI
743 acpi_handle acpi_handle;
744 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
746 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
749 /* The following initializer overrides a method to NULL whether one of
750 * its parent has the method defined or not. This is equivalent to
751 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
752 * expression and thus can't be used as an initializer.
754 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
756 struct ata_port_operations {
760 int (*qc_defer)(struct ata_queued_cmd *qc);
761 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
762 void (*qc_prep)(struct ata_queued_cmd *qc);
763 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
764 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
767 * Configuration and exception handling
769 int (*cable_detect)(struct ata_port *ap);
770 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
771 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
772 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
773 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
774 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
776 void (*dev_config)(struct ata_device *dev);
778 void (*freeze)(struct ata_port *ap);
779 void (*thaw)(struct ata_port *ap);
780 ata_prereset_fn_t prereset;
781 ata_reset_fn_t softreset;
782 ata_reset_fn_t hardreset;
783 ata_postreset_fn_t postreset;
784 ata_prereset_fn_t pmp_prereset;
785 ata_reset_fn_t pmp_softreset;
786 ata_reset_fn_t pmp_hardreset;
787 ata_postreset_fn_t pmp_postreset;
788 void (*error_handler)(struct ata_port *ap);
789 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
794 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
795 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
796 void (*pmp_attach)(struct ata_port *ap);
797 void (*pmp_detach)(struct ata_port *ap);
798 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
799 void (*disable_pm)(struct ata_port *ap);
802 * Start, stop, suspend and resume
804 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
805 int (*port_resume)(struct ata_port *ap);
806 int (*port_start)(struct ata_port *ap);
807 void (*port_stop)(struct ata_port *ap);
808 void (*host_stop)(struct ata_host *host);
810 #ifdef CONFIG_ATA_SFF
812 * SFF / taskfile oriented ops
814 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
815 u8 (*sff_check_status)(struct ata_port *ap);
816 u8 (*sff_check_altstatus)(struct ata_port *ap);
817 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
818 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
819 void (*sff_exec_command)(struct ata_port *ap,
820 const struct ata_taskfile *tf);
821 unsigned int (*sff_data_xfer)(struct ata_device *dev,
822 unsigned char *buf, unsigned int buflen, int rw);
823 u8 (*sff_irq_on)(struct ata_port *);
824 void (*sff_irq_clear)(struct ata_port *);
826 void (*bmdma_setup)(struct ata_queued_cmd *qc);
827 void (*bmdma_start)(struct ata_queued_cmd *qc);
828 void (*bmdma_stop)(struct ata_queued_cmd *qc);
829 u8 (*bmdma_status)(struct ata_port *ap);
830 #endif /* CONFIG_ATA_SFF */
832 ssize_t (*em_show)(struct ata_port *ap, char *buf);
833 ssize_t (*em_store)(struct ata_port *ap, const char *message,
835 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
836 ssize_t (*sw_activity_store)(struct ata_device *dev,
837 enum sw_activity val);
841 void (*phy_reset)(struct ata_port *ap);
842 void (*eng_timeout)(struct ata_port *ap);
845 * ->inherits must be the last field and all the preceding
846 * fields must be pointers.
848 const struct ata_port_operations *inherits;
851 struct ata_port_info {
853 unsigned long link_flags;
854 unsigned long pio_mask;
855 unsigned long mwdma_mask;
856 unsigned long udma_mask;
857 struct ata_port_operations *port_ops;
862 unsigned short mode; /* ATA mode */
863 unsigned short setup; /* t1 */
864 unsigned short act8b; /* t2 for 8-bit I/O */
865 unsigned short rec8b; /* t2i for 8-bit I/O */
866 unsigned short cyc8b; /* t0 for 8-bit I/O */
867 unsigned short active; /* t2 or tD */
868 unsigned short recover; /* t2i or tK */
869 unsigned short cycle; /* t0 */
870 unsigned short udma; /* t2CYCTYP/2 */
874 * Core layer - drivers/ata/libata-core.c
876 extern const unsigned long sata_deb_timing_normal[];
877 extern const unsigned long sata_deb_timing_hotplug[];
878 extern const unsigned long sata_deb_timing_long[];
880 extern struct ata_port_operations ata_dummy_port_ops;
881 extern const struct ata_port_info ata_dummy_port_info;
883 static inline const unsigned long *
884 sata_ehc_deb_timing(struct ata_eh_context *ehc)
886 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
887 return sata_deb_timing_hotplug;
889 return sata_deb_timing_normal;
892 static inline int ata_port_is_dummy(struct ata_port *ap)
894 return ap->ops == &ata_dummy_port_ops;
897 extern void ata_port_probe(struct ata_port *);
898 extern int sata_set_spd(struct ata_link *link);
899 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
900 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
901 int (*check_ready)(struct ata_link *link));
902 extern int sata_link_debounce(struct ata_link *link,
903 const unsigned long *params, unsigned long deadline);
904 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
905 unsigned long deadline);
906 extern int sata_link_hardreset(struct ata_link *link,
907 const unsigned long *timing, unsigned long deadline,
908 bool *online, int (*check_ready)(struct ata_link *));
909 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
910 unsigned long deadline);
911 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
912 extern void ata_port_disable(struct ata_port *);
914 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
915 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
916 const struct ata_port_info * const * ppi, int n_ports);
917 extern int ata_slave_link_init(struct ata_port *ap);
918 extern int ata_host_start(struct ata_host *host);
919 extern int ata_host_register(struct ata_host *host,
920 struct scsi_host_template *sht);
921 extern int ata_host_activate(struct ata_host *host, int irq,
922 irq_handler_t irq_handler, unsigned long irq_flags,
923 struct scsi_host_template *sht);
924 extern void ata_host_detach(struct ata_host *host);
925 extern void ata_host_init(struct ata_host *, struct device *,
926 unsigned long, struct ata_port_operations *);
927 extern int ata_scsi_detect(struct scsi_host_template *sht);
928 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
929 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
930 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
931 int cmd, void __user *arg);
932 extern void ata_sas_port_destroy(struct ata_port *);
933 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
934 struct ata_port_info *, struct Scsi_Host *);
935 extern int ata_sas_port_init(struct ata_port *);
936 extern int ata_sas_port_start(struct ata_port *ap);
937 extern void ata_sas_port_stop(struct ata_port *ap);
938 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
939 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
940 struct ata_port *ap);
941 extern int sata_scr_valid(struct ata_link *link);
942 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
943 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
944 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
945 extern bool ata_link_online(struct ata_link *link);
946 extern bool ata_link_offline(struct ata_link *link);
948 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
949 extern void ata_host_resume(struct ata_host *host);
951 extern int ata_ratelimit(void);
952 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
953 unsigned long interval, unsigned long timeout);
954 extern int atapi_cmd_type(u8 opcode);
955 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
956 u8 pmp, int is_cmd, u8 *fis);
957 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
958 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
959 unsigned long mwdma_mask, unsigned long udma_mask);
960 extern void ata_unpack_xfermask(unsigned long xfer_mask,
961 unsigned long *pio_mask, unsigned long *mwdma_mask,
962 unsigned long *udma_mask);
963 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
964 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
965 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
966 extern const char *ata_mode_string(unsigned long xfer_mask);
967 extern unsigned long ata_id_xfermask(const u16 *id);
968 extern int ata_port_start(struct ata_port *ap);
969 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
970 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
971 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
972 unsigned int n_elem);
973 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
974 extern void ata_dev_disable(struct ata_device *adev);
975 extern void ata_id_string(const u16 *id, unsigned char *s,
976 unsigned int ofs, unsigned int len);
977 extern void ata_id_c_string(const u16 *id, unsigned char *s,
978 unsigned int ofs, unsigned int len);
979 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
980 struct ata_taskfile *tf, u16 *id);
981 extern void ata_qc_complete(struct ata_queued_cmd *qc);
982 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
983 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
984 void (*done)(struct scsi_cmnd *));
985 extern int ata_std_bios_param(struct scsi_device *sdev,
986 struct block_device *bdev,
987 sector_t capacity, int geom[]);
988 extern int ata_scsi_slave_config(struct scsi_device *sdev);
989 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
990 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
992 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
993 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
995 extern int ata_cable_40wire(struct ata_port *ap);
996 extern int ata_cable_80wire(struct ata_port *ap);
997 extern int ata_cable_sata(struct ata_port *ap);
998 extern int ata_cable_ignore(struct ata_port *ap);
999 extern int ata_cable_unknown(struct ata_port *ap);
1001 /* Timing helpers */
1002 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1003 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1004 extern int ata_timing_compute(struct ata_device *, unsigned short,
1005 struct ata_timing *, int, int);
1006 extern void ata_timing_merge(const struct ata_timing *,
1007 const struct ata_timing *, struct ata_timing *,
1009 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1016 unsigned int reg; /* PCI config register to read */
1017 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1022 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1023 extern void ata_pci_remove_one(struct pci_dev *pdev);
1026 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1027 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1028 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1029 extern int ata_pci_device_resume(struct pci_dev *pdev);
1030 #endif /* CONFIG_PM */
1031 #endif /* CONFIG_PCI */
1034 * ACPI - drivers/ata/libata-acpi.c
1036 #ifdef CONFIG_ATA_ACPI
1037 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1039 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1040 return &ap->__acpi_init_gtm;
1043 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1044 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1045 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1046 const struct ata_acpi_gtm *gtm);
1047 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1049 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1054 static inline int ata_acpi_stm(const struct ata_port *ap,
1055 struct ata_acpi_gtm *stm)
1060 static inline int ata_acpi_gtm(const struct ata_port *ap,
1061 struct ata_acpi_gtm *stm)
1066 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1067 const struct ata_acpi_gtm *gtm)
1072 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1073 const struct ata_acpi_gtm *gtm)
1080 * EH - drivers/ata/libata-eh.c
1082 extern void ata_port_schedule_eh(struct ata_port *ap);
1083 extern int ata_link_abort(struct ata_link *link);
1084 extern int ata_port_abort(struct ata_port *ap);
1085 extern int ata_port_freeze(struct ata_port *ap);
1086 extern int sata_async_notification(struct ata_port *ap);
1088 extern void ata_eh_freeze_port(struct ata_port *ap);
1089 extern void ata_eh_thaw_port(struct ata_port *ap);
1091 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1092 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1093 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1095 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1096 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1097 ata_postreset_fn_t postreset);
1098 extern void ata_std_error_handler(struct ata_port *ap);
1101 * Base operations to inherit from and initializers for sht
1105 * base : Common to all libata drivers.
1106 * sata : SATA controllers w/ native interface.
1107 * pmp : SATA controllers w/ PMP support.
1108 * sff : SFF ATA controllers w/o BMDMA support.
1109 * bmdma : SFF ATA controllers w/ BMDMA support.
1113 * BASE : Common to all libata drivers. The user must set
1114 * sg_tablesize and dma_boundary.
1115 * PIO : SFF ATA controllers w/ only PIO support.
1116 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1117 * dma_boundary are set to BMDMA limits.
1118 * NCQ : SATA controllers supporting NCQ. The user must set
1119 * sg_tablesize, dma_boundary and can_queue.
1121 extern const struct ata_port_operations ata_base_port_ops;
1122 extern const struct ata_port_operations sata_port_ops;
1123 extern struct device_attribute *ata_common_sdev_attrs[];
1125 #define ATA_BASE_SHT(drv_name) \
1126 .module = THIS_MODULE, \
1128 .ioctl = ata_scsi_ioctl, \
1129 .queuecommand = ata_scsi_queuecmd, \
1130 .can_queue = ATA_DEF_QUEUE, \
1131 .this_id = ATA_SHT_THIS_ID, \
1132 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1133 .emulated = ATA_SHT_EMULATED, \
1134 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1135 .proc_name = drv_name, \
1136 .slave_configure = ata_scsi_slave_config, \
1137 .slave_destroy = ata_scsi_slave_destroy, \
1138 .bios_param = ata_std_bios_param, \
1139 .sdev_attrs = ata_common_sdev_attrs
1141 #define ATA_NCQ_SHT(drv_name) \
1142 ATA_BASE_SHT(drv_name), \
1143 .change_queue_depth = ata_scsi_change_queue_depth
1148 #ifdef CONFIG_SATA_PMP
1149 static inline bool sata_pmp_supported(struct ata_port *ap)
1151 return ap->flags & ATA_FLAG_PMP;
1154 static inline bool sata_pmp_attached(struct ata_port *ap)
1156 return ap->nr_pmp_links != 0;
1159 static inline int ata_is_host_link(const struct ata_link *link)
1161 return link == &link->ap->link || link == link->ap->slave_link;
1163 #else /* CONFIG_SATA_PMP */
1164 static inline bool sata_pmp_supported(struct ata_port *ap)
1169 static inline bool sata_pmp_attached(struct ata_port *ap)
1174 static inline int ata_is_host_link(const struct ata_link *link)
1178 #endif /* CONFIG_SATA_PMP */
1180 static inline int sata_srst_pmp(struct ata_link *link)
1182 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1183 return SATA_PMP_CTRL_PORT;
1190 #define ata_port_printk(ap, lv, fmt, args...) \
1191 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1193 #define ata_link_printk(link, lv, fmt, args...) do { \
1194 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1195 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1196 (link)->pmp , ##args); \
1198 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1201 #define ata_dev_printk(dev, lv, fmt, args...) \
1202 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1203 (dev)->link->pmp + (dev)->devno , ##args)
1206 * ata_eh_info helpers
1208 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1209 __attribute__ ((format (printf, 2, 3)));
1210 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1211 __attribute__ ((format (printf, 2, 3)));
1212 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1214 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1216 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1217 ehi->flags |= ATA_EHI_HOTPLUGGED;
1218 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1219 ehi->err_mask |= AC_ERR_ATA_BUS;
1223 * port description helpers
1225 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1226 __attribute__ ((format (printf, 2, 3)));
1228 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1232 static inline unsigned int ata_tag_valid(unsigned int tag)
1234 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1237 static inline unsigned int ata_tag_internal(unsigned int tag)
1239 return tag == ATA_TAG_INTERNAL;
1245 static inline unsigned int ata_class_enabled(unsigned int class)
1247 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1248 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1251 static inline unsigned int ata_class_disabled(unsigned int class)
1253 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1254 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1257 static inline unsigned int ata_class_absent(unsigned int class)
1259 return !ata_class_enabled(class) && !ata_class_disabled(class);
1262 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1264 return ata_class_enabled(dev->class);
1267 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1269 return ata_class_disabled(dev->class);
1272 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1274 return ata_class_absent(dev->class);
1280 static inline int ata_link_max_devices(const struct ata_link *link)
1282 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1287 static inline int ata_link_active(struct ata_link *link)
1289 return ata_tag_valid(link->active_tag) || link->sactive;
1295 * ATA_LITER_* constants are used to select link iteration mode and
1296 * ATA_DITER_* device iteration mode.
1298 * For a custom iteration directly using ata_{link|dev}_next(), if
1299 * @link or @dev, respectively, is NULL, the first element is
1300 * returned. @dev and @link can be any valid device or link and the
1301 * next element according to the iteration mode will be returned.
1302 * After the last element, NULL is returned.
1304 enum ata_link_iter_mode {
1305 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1306 * host link. no slave link */
1307 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1308 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1309 * slave link still comes after host link */
1312 enum ata_dev_iter_mode {
1314 ATA_DITER_ENABLED_REVERSE,
1316 ATA_DITER_ALL_REVERSE,
1319 extern struct ata_link *ata_link_next(struct ata_link *link,
1320 struct ata_port *ap,
1321 enum ata_link_iter_mode mode);
1323 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1324 struct ata_link *link,
1325 enum ata_dev_iter_mode mode);
1328 * Shortcut notation for iterations
1330 * ata_for_each_link() iterates over each link of @ap according to
1331 * @mode. @link points to the current link in the loop. @link is
1332 * NULL after loop termination. ata_for_each_dev() works the same way
1333 * except that it iterates over each device of @link.
1335 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1336 * specified when using the following shorthand notations. Only the
1337 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1338 * specified. This not only increases brevity but also makes it
1339 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1341 #define ata_for_each_link(link, ap, mode) \
1342 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1343 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1345 #define ata_for_each_dev(dev, link, mode) \
1346 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1347 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1350 * ata_ncq_enabled - Test whether NCQ is enabled
1351 * @dev: ATA device to test for
1354 * spin_lock_irqsave(host lock)
1357 * 1 if NCQ is enabled for @dev, 0 otherwise.
1359 static inline int ata_ncq_enabled(struct ata_device *dev)
1361 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1362 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1365 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1367 qc->tf.ctl |= ATA_NIEN;
1370 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1373 if (likely(ata_tag_valid(tag)))
1374 return &ap->qcmd[tag];
1378 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1381 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1383 if (unlikely(!qc) || !ap->ops->error_handler)
1386 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1387 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1393 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1395 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1398 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1400 memset(tf, 0, sizeof(*tf));
1402 tf->ctl = dev->link->ap->ctl;
1403 if (dev->devno == 0)
1404 tf->device = ATA_DEVICE_OBS;
1406 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1409 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1411 qc->dma_dir = DMA_NONE;
1416 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1419 qc->sect_size = ATA_SECT_SIZE;
1421 ata_tf_init(qc->dev, &qc->tf);
1423 /* init result_tf such that it indicates normal completion */
1424 qc->result_tf.command = ATA_DRDY;
1425 qc->result_tf.feature = 0;
1428 static inline int ata_try_flush_cache(const struct ata_device *dev)
1430 return ata_id_wcache_enabled(dev->id) ||
1431 ata_id_has_flush(dev->id) ||
1432 ata_id_has_flush_ext(dev->id);
1435 static inline unsigned int ac_err_mask(u8 status)
1437 if (status & (ATA_BUSY | ATA_DRQ))
1439 if (status & (ATA_ERR | ATA_DF))
1444 static inline unsigned int __ac_err_mask(u8 status)
1446 unsigned int mask = ac_err_mask(status);
1448 return AC_ERR_OTHER;
1452 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1454 return *(struct ata_port **)&host->hostdata[0];
1457 static inline int ata_check_ready(u8 status)
1459 if (!(status & ATA_BUSY))
1462 /* 0xff indicates either no device or device not ready */
1469 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1470 unsigned long timeout_msecs)
1472 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1475 /* Don't open code these in drivers as there are traps. Firstly the range may
1476 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1477 > UDMA_0. Dyma ddreigiau */
1479 static inline int ata_using_mwdma(struct ata_device *adev)
1481 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1486 static inline int ata_using_udma(struct ata_device *adev)
1488 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1493 static inline int ata_dma_enabled(struct ata_device *adev)
1495 return (adev->dma_mode == 0xFF ? 0 : 1);
1498 /**************************************************************************
1499 * PMP - drivers/ata/libata-pmp.c
1501 #ifdef CONFIG_SATA_PMP
1503 extern const struct ata_port_operations sata_pmp_port_ops;
1505 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1506 extern void sata_pmp_error_handler(struct ata_port *ap);
1508 #else /* CONFIG_SATA_PMP */
1510 #define sata_pmp_port_ops sata_port_ops
1511 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1512 #define sata_pmp_error_handler ata_std_error_handler
1514 #endif /* CONFIG_SATA_PMP */
1517 /**************************************************************************
1518 * SFF - drivers/ata/libata-sff.c
1520 #ifdef CONFIG_ATA_SFF
1522 extern const struct ata_port_operations ata_sff_port_ops;
1523 extern const struct ata_port_operations ata_bmdma_port_ops;
1524 extern const struct ata_port_operations ata_bmdma32_port_ops;
1526 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1527 #define ATA_PIO_SHT(drv_name) \
1528 ATA_BASE_SHT(drv_name), \
1529 .sg_tablesize = LIBATA_MAX_PRD, \
1530 .dma_boundary = ATA_DMA_BOUNDARY
1532 #define ATA_BMDMA_SHT(drv_name) \
1533 ATA_BASE_SHT(drv_name), \
1534 .sg_tablesize = LIBATA_MAX_PRD, \
1535 .dma_boundary = ATA_DMA_BOUNDARY
1537 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1538 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1539 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1540 extern u8 ata_sff_check_status(struct ata_port *ap);
1541 extern void ata_sff_pause(struct ata_port *ap);
1542 extern void ata_sff_dma_pause(struct ata_port *ap);
1543 extern int ata_sff_busy_sleep(struct ata_port *ap,
1544 unsigned long timeout_pat, unsigned long timeout);
1545 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1546 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1547 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1548 extern void ata_sff_exec_command(struct ata_port *ap,
1549 const struct ata_taskfile *tf);
1550 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1551 unsigned char *buf, unsigned int buflen, int rw);
1552 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1553 unsigned char *buf, unsigned int buflen, int rw);
1554 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1555 unsigned char *buf, unsigned int buflen, int rw);
1556 extern u8 ata_sff_irq_on(struct ata_port *ap);
1557 extern void ata_sff_irq_clear(struct ata_port *ap);
1558 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1559 u8 status, int in_wq);
1560 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1561 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1562 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1563 struct ata_queued_cmd *qc);
1564 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1565 extern void ata_sff_freeze(struct ata_port *ap);
1566 extern void ata_sff_thaw(struct ata_port *ap);
1567 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1568 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1570 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1571 unsigned long deadline);
1572 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1573 unsigned long deadline);
1574 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1575 unsigned long deadline);
1576 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1577 extern void ata_sff_error_handler(struct ata_port *ap);
1578 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1579 extern int ata_sff_port_start(struct ata_port *ap);
1580 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1581 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1582 unsigned long xfer_mask);
1583 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1584 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1585 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1586 extern u8 ata_bmdma_status(struct ata_port *ap);
1587 extern void ata_bus_reset(struct ata_port *ap);
1590 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1591 extern int ata_pci_bmdma_init(struct ata_host *host);
1592 extern int ata_pci_sff_init_host(struct ata_host *host);
1593 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1594 const struct ata_port_info * const * ppi,
1595 struct ata_host **r_host);
1596 extern int ata_pci_sff_activate_host(struct ata_host *host,
1597 irq_handler_t irq_handler,
1598 struct scsi_host_template *sht);
1599 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1600 const struct ata_port_info * const * ppi,
1601 struct scsi_host_template *sht, void *host_priv);
1602 #endif /* CONFIG_PCI */
1605 * ata_sff_busy_wait - Wait for a port status register
1606 * @ap: Port to wait for.
1607 * @bits: bits that must be clear
1608 * @max: number of 10uS waits to perform
1610 * Waits up to max*10 microseconds for the selected bits in the port's
1611 * status register to be cleared.
1612 * Returns final value of status register.
1615 * Inherited from caller.
1617 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1624 status = ap->ops->sff_check_status(ap);
1626 } while (status != 0xff && (status & bits) && (max > 0));
1632 * ata_wait_idle - Wait for a port to be idle.
1633 * @ap: Port to wait for.
1635 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1636 * Returns final value of status register.
1639 * Inherited from caller.
1641 static inline u8 ata_wait_idle(struct ata_port *ap)
1643 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1646 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1647 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1653 #endif /* CONFIG_ATA_SFF */
1655 #endif /* __LINUX_LIBATA_H__ */