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TOMOYO Linux Cross Reference
Linux/include/linux/libata.h

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  1 /*
  2  *  Copyright 2003-2005 Red Hat, Inc.  All rights reserved.
  3  *  Copyright 2003-2005 Jeff Garzik
  4  *
  5  *
  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)
  9  *  any later version.
 10  *
 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.
 15  *
 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.
 19  *
 20  *
 21  *  libata documentation is available via 'make {ps|pdf}docs',
 22  *  as Documentation/DocBook/libata.*
 23  *
 24  */
 25 
 26 #ifndef __LINUX_LIBATA_H__
 27 #define __LINUX_LIBATA_H__
 28 
 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>
 34 #include <linux/io.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>
 40 #include <linux/sched.h>
 41 
 42 /*
 43  * Define if arch has non-standard setup.  This is a _PCI_ standard
 44  * not a legacy or ISA standard.
 45  */
 46 #ifdef CONFIG_ATA_NONSTANDARD
 47 #include <asm/libata-portmap.h>
 48 #else
 49 #include <asm-generic/libata-portmap.h>
 50 #endif
 51 
 52 /*
 53  * compile-time options: to be removed as soon as all the drivers are
 54  * converted to the new debugging mechanism
 55  */
 56 #undef ATA_DEBUG                /* debugging output */
 57 #undef ATA_VERBOSE_DEBUG        /* yet more debugging output */
 58 #undef ATA_IRQ_TRAP             /* define to ack screaming irqs */
 59 #undef ATA_NDEBUG               /* define to disable quick runtime checks */
 60 
 61 
 62 /* note: prints function name for you */
 63 #ifdef ATA_DEBUG
 64 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
 65 #ifdef ATA_VERBOSE_DEBUG
 66 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
 67 #else
 68 #define VPRINTK(fmt, args...)
 69 #endif  /* ATA_VERBOSE_DEBUG */
 70 #else
 71 #define DPRINTK(fmt, args...)
 72 #define VPRINTK(fmt, args...)
 73 #endif  /* ATA_DEBUG */
 74 
 75 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
 76 
 77 #define ata_print_version_once(dev, version)                    \
 78 ({                                                              \
 79         static bool __print_once;                               \
 80                                                                 \
 81         if (!__print_once) {                                    \
 82                 __print_once = true;                            \
 83                 ata_print_version(dev, version);                \
 84         }                                                       \
 85 })
 86 
 87 /* NEW: debug levels */
 88 #define HAVE_LIBATA_MSG 1
 89 
 90 enum {
 91         ATA_MSG_DRV     = 0x0001,
 92         ATA_MSG_INFO    = 0x0002,
 93         ATA_MSG_PROBE   = 0x0004,
 94         ATA_MSG_WARN    = 0x0008,
 95         ATA_MSG_MALLOC  = 0x0010,
 96         ATA_MSG_CTL     = 0x0020,
 97         ATA_MSG_INTR    = 0x0040,
 98         ATA_MSG_ERR     = 0x0080,
 99 };
100 
101 #define ata_msg_drv(p)    ((p)->msg_enable & ATA_MSG_DRV)
102 #define ata_msg_info(p)   ((p)->msg_enable & ATA_MSG_INFO)
103 #define ata_msg_probe(p)  ((p)->msg_enable & ATA_MSG_PROBE)
104 #define ata_msg_warn(p)   ((p)->msg_enable & ATA_MSG_WARN)
105 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
106 #define ata_msg_ctl(p)    ((p)->msg_enable & ATA_MSG_CTL)
107 #define ata_msg_intr(p)   ((p)->msg_enable & ATA_MSG_INTR)
108 #define ata_msg_err(p)    ((p)->msg_enable & ATA_MSG_ERR)
109 
110 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
111 {
112         if (dval < 0 || dval >= (sizeof(u32) * 8))
113                 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
114         if (!dval)
115                 return 0;
116         return (1 << dval) - 1;
117 }
118 
119 /* defines only for the constants which don't work well as enums */
120 #define ATA_TAG_POISON          0xfafbfcfdU
121 
122 enum {
123         /* various global constants */
124         LIBATA_MAX_PRD          = ATA_MAX_PRD / 2,
125         LIBATA_DUMB_MAX_PRD     = ATA_MAX_PRD / 4,      /* Worst case */
126         ATA_DEF_QUEUE           = 1,
127         /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
128         ATA_MAX_QUEUE           = 32,
129         ATA_TAG_INTERNAL        = ATA_MAX_QUEUE - 1,
130         ATA_SHORT_PAUSE         = 16,
131 
132         ATAPI_MAX_DRAIN         = 16 << 10,
133 
134         ATA_ALL_DEVICES         = (1 << ATA_MAX_DEVICES) - 1,
135 
136         ATA_SHT_EMULATED        = 1,
137         ATA_SHT_THIS_ID         = -1,
138         ATA_SHT_USE_CLUSTERING  = 1,
139 
140         /* struct ata_taskfile flags */
141         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
142         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
143         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
144         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
145         ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
146         ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
147         ATA_TFLAG_POLLING       = (1 << 6), /* set nIEN to 1 and use polling */
148 
149         /* protocol flags */
150         ATA_PROT_FLAG_PIO       = (1 << 0), /* is PIO */
151         ATA_PROT_FLAG_DMA       = (1 << 1), /* is DMA */
152         ATA_PROT_FLAG_DATA      = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
153         ATA_PROT_FLAG_NCQ       = (1 << 2), /* is NCQ */
154         ATA_PROT_FLAG_ATAPI     = (1 << 3), /* is ATAPI */
155 
156         /* struct ata_device stuff */
157         ATA_DFLAG_LBA           = (1 << 0), /* device supports LBA */
158         ATA_DFLAG_LBA48         = (1 << 1), /* device supports LBA48 */
159         ATA_DFLAG_CDB_INTR      = (1 << 2), /* device asserts INTRQ when ready for CDB */
160         ATA_DFLAG_NCQ           = (1 << 3), /* device supports NCQ */
161         ATA_DFLAG_FLUSH_EXT     = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
162         ATA_DFLAG_ACPI_PENDING  = (1 << 5), /* ACPI resume action pending */
163         ATA_DFLAG_ACPI_FAILED   = (1 << 6), /* ACPI on devcfg has failed */
164         ATA_DFLAG_AN            = (1 << 7), /* AN configured */
165         ATA_DFLAG_DMADIR        = (1 << 10), /* device requires DMADIR */
166         ATA_DFLAG_CFG_MASK      = (1 << 12) - 1,
167 
168         ATA_DFLAG_PIO           = (1 << 12), /* device limited to PIO mode */
169         ATA_DFLAG_NCQ_OFF       = (1 << 13), /* device limited to non-NCQ mode */
170         ATA_DFLAG_SLEEPING      = (1 << 15), /* device is sleeping */
171         ATA_DFLAG_DUBIOUS_XFER  = (1 << 16), /* data transfer not verified */
172         ATA_DFLAG_NO_UNLOAD     = (1 << 17), /* device doesn't support unload */
173         ATA_DFLAG_UNLOCK_HPA    = (1 << 18), /* unlock HPA */
174         ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */
175         ATA_DFLAG_INIT_MASK     = (1 << 24) - 1,
176 
177         ATA_DFLAG_DETACH        = (1 << 24),
178         ATA_DFLAG_DETACHED      = (1 << 25),
179 
180         ATA_DFLAG_DA            = (1 << 26), /* device supports Device Attention */
181         ATA_DFLAG_DEVSLP        = (1 << 27), /* device supports Device Sleep */
182         ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
183         ATA_DFLAG_D_SENSE       = (1 << 29), /* Descriptor sense requested */
184         ATA_DFLAG_ZAC           = (1 << 30), /* ZAC device */
185 
186         ATA_DEV_UNKNOWN         = 0,    /* unknown device */
187         ATA_DEV_ATA             = 1,    /* ATA device */
188         ATA_DEV_ATA_UNSUP       = 2,    /* ATA device (unsupported) */
189         ATA_DEV_ATAPI           = 3,    /* ATAPI device */
190         ATA_DEV_ATAPI_UNSUP     = 4,    /* ATAPI device (unsupported) */
191         ATA_DEV_PMP             = 5,    /* SATA port multiplier */
192         ATA_DEV_PMP_UNSUP       = 6,    /* SATA port multiplier (unsupported) */
193         ATA_DEV_SEMB            = 7,    /* SEMB */
194         ATA_DEV_SEMB_UNSUP      = 8,    /* SEMB (unsupported) */
195         ATA_DEV_ZAC             = 9,    /* ZAC device */
196         ATA_DEV_ZAC_UNSUP       = 10,   /* ZAC device (unsupported) */
197         ATA_DEV_NONE            = 11,   /* no device */
198 
199         /* struct ata_link flags */
200         ATA_LFLAG_NO_HRST       = (1 << 1), /* avoid hardreset */
201         ATA_LFLAG_NO_SRST       = (1 << 2), /* avoid softreset */
202         ATA_LFLAG_ASSUME_ATA    = (1 << 3), /* assume ATA class */
203         ATA_LFLAG_ASSUME_SEMB   = (1 << 4), /* assume SEMB class */
204         ATA_LFLAG_ASSUME_CLASS  = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
205         ATA_LFLAG_NO_RETRY      = (1 << 5), /* don't retry this link */
206         ATA_LFLAG_DISABLED      = (1 << 6), /* link is disabled */
207         ATA_LFLAG_SW_ACTIVITY   = (1 << 7), /* keep activity stats */
208         ATA_LFLAG_NO_LPM        = (1 << 8), /* disable LPM on this link */
209         ATA_LFLAG_RST_ONCE      = (1 << 9), /* limit recovery to one reset */
210         ATA_LFLAG_CHANGED       = (1 << 10), /* LPM state changed on this link */
211         ATA_LFLAG_NO_DB_DELAY   = (1 << 11), /* no debounce delay on link resume */
212 
213         /* struct ata_port flags */
214         ATA_FLAG_SLAVE_POSS     = (1 << 0), /* host supports slave dev */
215                                             /* (doesn't imply presence) */
216         ATA_FLAG_SATA           = (1 << 1),
217         ATA_FLAG_NO_LOG_PAGE    = (1 << 5), /* do not issue log page read */
218         ATA_FLAG_NO_ATAPI       = (1 << 6), /* No ATAPI support */
219         ATA_FLAG_PIO_DMA        = (1 << 7), /* PIO cmds via DMA */
220         ATA_FLAG_PIO_LBA48      = (1 << 8), /* Host DMA engine is LBA28 only */
221         ATA_FLAG_PIO_POLLING    = (1 << 9), /* use polling PIO if LLD
222                                              * doesn't handle PIO interrupts */
223         ATA_FLAG_NCQ            = (1 << 10), /* host supports NCQ */
224         ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
225         ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
226         ATA_FLAG_DEBUGMSG       = (1 << 13),
227         ATA_FLAG_FPDMA_AA               = (1 << 14), /* driver supports Auto-Activate */
228         ATA_FLAG_IGN_SIMPLEX    = (1 << 15), /* ignore SIMPLEX */
229         ATA_FLAG_NO_IORDY       = (1 << 16), /* controller lacks iordy */
230         ATA_FLAG_ACPI_SATA      = (1 << 17), /* need native SATA ACPI layout */
231         ATA_FLAG_AN             = (1 << 18), /* controller supports AN */
232         ATA_FLAG_PMP            = (1 << 19), /* controller supports PMP */
233         ATA_FLAG_FPDMA_AUX      = (1 << 20), /* controller supports H2DFIS aux field */
234         ATA_FLAG_EM             = (1 << 21), /* driver supports enclosure
235                                               * management */
236         ATA_FLAG_SW_ACTIVITY    = (1 << 22), /* driver supports sw activity
237                                               * led */
238         ATA_FLAG_NO_DIPM        = (1 << 23), /* host not happy with DIPM */
239         ATA_FLAG_SAS_HOST       = (1 << 24), /* SAS host */
240 
241         /* bits 24:31 of ap->flags are reserved for LLD specific flags */
242 
243 
244         /* struct ata_port pflags */
245         ATA_PFLAG_EH_PENDING    = (1 << 0), /* EH pending */
246         ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
247         ATA_PFLAG_FROZEN        = (1 << 2), /* port is frozen */
248         ATA_PFLAG_RECOVERED     = (1 << 3), /* recovery action performed */
249         ATA_PFLAG_LOADING       = (1 << 4), /* boot/loading probe */
250         ATA_PFLAG_SCSI_HOTPLUG  = (1 << 6), /* SCSI hotplug scheduled */
251         ATA_PFLAG_INITIALIZING  = (1 << 7), /* being initialized, don't touch */
252         ATA_PFLAG_RESETTING     = (1 << 8), /* reset in progress */
253         ATA_PFLAG_UNLOADING     = (1 << 9), /* driver is being unloaded */
254         ATA_PFLAG_UNLOADED      = (1 << 10), /* driver is unloaded */
255 
256         ATA_PFLAG_SUSPENDED     = (1 << 17), /* port is suspended (power) */
257         ATA_PFLAG_PM_PENDING    = (1 << 18), /* PM operation pending */
258         ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
259 
260         ATA_PFLAG_PIO32         = (1 << 20),  /* 32bit PIO */
261         ATA_PFLAG_PIO32CHANGE   = (1 << 21),  /* 32bit PIO can be turned on/off */
262         ATA_PFLAG_EXTERNAL      = (1 << 22),  /* eSATA/external port */
263 
264         /* struct ata_queued_cmd flags */
265         ATA_QCFLAG_ACTIVE       = (1 << 0), /* cmd not yet ack'd to scsi lyer */
266         ATA_QCFLAG_DMAMAP       = (1 << 1), /* SG table is DMA mapped */
267         ATA_QCFLAG_IO           = (1 << 3), /* standard IO command */
268         ATA_QCFLAG_RESULT_TF    = (1 << 4), /* result TF requested */
269         ATA_QCFLAG_CLEAR_EXCL   = (1 << 5), /* clear excl_link on completion */
270         ATA_QCFLAG_QUIET        = (1 << 6), /* don't report device error */
271         ATA_QCFLAG_RETRY        = (1 << 7), /* retry after failure */
272 
273         ATA_QCFLAG_FAILED       = (1 << 16), /* cmd failed and is owned by EH */
274         ATA_QCFLAG_SENSE_VALID  = (1 << 17), /* sense data valid */
275         ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
276 
277         /* host set flags */
278         ATA_HOST_SIMPLEX        = (1 << 0),     /* Host is simplex, one DMA channel per host only */
279         ATA_HOST_STARTED        = (1 << 1),     /* Host started */
280         ATA_HOST_PARALLEL_SCAN  = (1 << 2),     /* Ports on this host can be scanned in parallel */
281         ATA_HOST_IGNORE_ATA     = (1 << 3),     /* Ignore ATA devices on this host. */
282 
283         /* bits 24:31 of host->flags are reserved for LLD specific flags */
284 
285         /* various lengths of time */
286         ATA_TMOUT_BOOT          = 30000,        /* heuristic */
287         ATA_TMOUT_BOOT_QUICK    =  7000,        /* heuristic */
288         ATA_TMOUT_INTERNAL_QUICK = 5000,
289         ATA_TMOUT_MAX_PARK      = 30000,
290 
291         /*
292          * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms.  2s
293          * is too much without parallel probing.  Use 2s if parallel
294          * probing is available, 800ms otherwise.
295          */
296         ATA_TMOUT_FF_WAIT_LONG  =  2000,
297         ATA_TMOUT_FF_WAIT       =   800,
298 
299         /* Spec mandates to wait for ">= 2ms" before checking status
300          * after reset.  We wait 150ms, because that was the magic
301          * delay used for ATAPI devices in Hale Landis's ATADRVR, for
302          * the period of time between when the ATA command register is
303          * written, and then status is checked.  Because waiting for
304          * "a while" before checking status is fine, post SRST, we
305          * perform this magic delay here as well.
306          *
307          * Old drivers/ide uses the 2mS rule and then waits for ready.
308          */
309         ATA_WAIT_AFTER_RESET    =  150,
310 
311         /* If PMP is supported, we have to do follow-up SRST.  As some
312          * PMPs don't send D2H Reg FIS after hardreset, LLDs are
313          * advised to wait only for the following duration before
314          * doing SRST.
315          */
316         ATA_TMOUT_PMP_SRST_WAIT = 5000,
317 
318         /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
319          * be a spurious PHY event, so ignore the first PHY event that
320          * occurs within 10s after the policy change.
321          */
322         ATA_TMOUT_SPURIOUS_PHY  = 10000,
323 
324         /* ATA bus states */
325         BUS_UNKNOWN             = 0,
326         BUS_DMA                 = 1,
327         BUS_IDLE                = 2,
328         BUS_NOINTR              = 3,
329         BUS_NODATA              = 4,
330         BUS_TIMER               = 5,
331         BUS_PIO                 = 6,
332         BUS_EDD                 = 7,
333         BUS_IDENTIFY            = 8,
334         BUS_PACKET              = 9,
335 
336         /* SATA port states */
337         PORT_UNKNOWN            = 0,
338         PORT_ENABLED            = 1,
339         PORT_DISABLED           = 2,
340 
341         /* encoding various smaller bitmaps into a single
342          * unsigned long bitmap
343          */
344         ATA_NR_PIO_MODES        = 7,
345         ATA_NR_MWDMA_MODES      = 5,
346         ATA_NR_UDMA_MODES       = 8,
347 
348         ATA_SHIFT_PIO           = 0,
349         ATA_SHIFT_MWDMA         = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
350         ATA_SHIFT_UDMA          = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
351 
352         /* size of buffer to pad xfers ending on unaligned boundaries */
353         ATA_DMA_PAD_SZ          = 4,
354 
355         /* ering size */
356         ATA_ERING_SIZE          = 32,
357 
358         /* return values for ->qc_defer */
359         ATA_DEFER_LINK          = 1,
360         ATA_DEFER_PORT          = 2,
361 
362         /* desc_len for ata_eh_info and context */
363         ATA_EH_DESC_LEN         = 80,
364 
365         /* reset / recovery action types */
366         ATA_EH_REVALIDATE       = (1 << 0),
367         ATA_EH_SOFTRESET        = (1 << 1), /* meaningful only in ->prereset */
368         ATA_EH_HARDRESET        = (1 << 2), /* meaningful only in ->prereset */
369         ATA_EH_RESET            = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
370         ATA_EH_ENABLE_LINK      = (1 << 3),
371         ATA_EH_PARK             = (1 << 5), /* unload heads and stop I/O */
372 
373         ATA_EH_PERDEV_MASK      = ATA_EH_REVALIDATE | ATA_EH_PARK,
374         ATA_EH_ALL_ACTIONS      = ATA_EH_REVALIDATE | ATA_EH_RESET |
375                                   ATA_EH_ENABLE_LINK,
376 
377         /* ata_eh_info->flags */
378         ATA_EHI_HOTPLUGGED      = (1 << 0),  /* could have been hotplugged */
379         ATA_EHI_NO_AUTOPSY      = (1 << 2),  /* no autopsy */
380         ATA_EHI_QUIET           = (1 << 3),  /* be quiet */
381         ATA_EHI_NO_RECOVERY     = (1 << 4),  /* no recovery */
382 
383         ATA_EHI_DID_SOFTRESET   = (1 << 16), /* already soft-reset this port */
384         ATA_EHI_DID_HARDRESET   = (1 << 17), /* already soft-reset this port */
385         ATA_EHI_PRINTINFO       = (1 << 18), /* print configuration info */
386         ATA_EHI_SETMODE         = (1 << 19), /* configure transfer mode */
387         ATA_EHI_POST_SETMODE    = (1 << 20), /* revalidating after setmode */
388 
389         ATA_EHI_DID_RESET       = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
390 
391         /* mask of flags to transfer *to* the slave link */
392         ATA_EHI_TO_SLAVE_MASK   = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
393 
394         /* max tries if error condition is still set after ->error_handler */
395         ATA_EH_MAX_TRIES        = 5,
396 
397         /* sometimes resuming a link requires several retries */
398         ATA_LINK_RESUME_TRIES   = 5,
399 
400         /* how hard are we gonna try to probe/recover devices */
401         ATA_PROBE_MAX_TRIES     = 3,
402         ATA_EH_DEV_TRIES        = 3,
403         ATA_EH_PMP_TRIES        = 5,
404         ATA_EH_PMP_LINK_TRIES   = 3,
405 
406         SATA_PMP_RW_TIMEOUT     = 3000,         /* PMP read/write timeout */
407 
408         /* This should match the actual table size of
409          * ata_eh_cmd_timeout_table in libata-eh.c.
410          */
411         ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
412 
413         /* Horkage types. May be set by libata or controller on drives
414            (some horkage may be drive/controller pair dependent */
415 
416         ATA_HORKAGE_DIAGNOSTIC  = (1 << 0),     /* Failed boot diag */
417         ATA_HORKAGE_NODMA       = (1 << 1),     /* DMA problems */
418         ATA_HORKAGE_NONCQ       = (1 << 2),     /* Don't use NCQ */
419         ATA_HORKAGE_MAX_SEC_128 = (1 << 3),     /* Limit max sects to 128 */
420         ATA_HORKAGE_BROKEN_HPA  = (1 << 4),     /* Broken HPA */
421         ATA_HORKAGE_DISABLE     = (1 << 5),     /* Disable it */
422         ATA_HORKAGE_HPA_SIZE    = (1 << 6),     /* native size off by one */
423         ATA_HORKAGE_IVB         = (1 << 8),     /* cbl det validity bit bugs */
424         ATA_HORKAGE_STUCK_ERR   = (1 << 9),     /* stuck ERR on next PACKET */
425         ATA_HORKAGE_BRIDGE_OK   = (1 << 10),    /* no bridge limits */
426         ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
427                                                     not multiple of 16 bytes */
428         ATA_HORKAGE_FIRMWARE_WARN = (1 << 12),  /* firmware update warning */
429         ATA_HORKAGE_1_5_GBPS    = (1 << 13),    /* force 1.5 Gbps */
430         ATA_HORKAGE_NOSETXFER   = (1 << 14),    /* skip SETXFER, SATA only */
431         ATA_HORKAGE_BROKEN_FPDMA_AA     = (1 << 15),    /* skip AA */
432         ATA_HORKAGE_DUMP_ID     = (1 << 16),    /* dump IDENTIFY data */
433         ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17),  /* Set max sects to 65535 */
434         ATA_HORKAGE_ATAPI_DMADIR = (1 << 18),   /* device requires dmadir */
435         ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19),    /* don't use queued TRIM */
436         ATA_HORKAGE_NOLPM       = (1 << 20),    /* don't use LPM */
437         ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21),  /* some WDs have broken LPM */
438         ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
439         ATA_HORKAGE_NO_NCQ_LOG  = (1 << 23),    /* don't use NCQ for log read */
440         ATA_HORKAGE_NOTRIM      = (1 << 24),    /* don't use TRIM */
441         ATA_HORKAGE_MAX_SEC_1024 = (1 << 25),   /* Limit max sects to 1024 */
442 
443          /* DMA mask for user DMA control: User visible values; DO NOT
444             renumber */
445         ATA_DMA_MASK_ATA        = (1 << 0),     /* DMA on ATA Disk */
446         ATA_DMA_MASK_ATAPI      = (1 << 1),     /* DMA on ATAPI */
447         ATA_DMA_MASK_CFA        = (1 << 2),     /* DMA on CF Card */
448 
449         /* ATAPI command types */
450         ATAPI_READ              = 0,            /* READs */
451         ATAPI_WRITE             = 1,            /* WRITEs */
452         ATAPI_READ_CD           = 2,            /* READ CD [MSF] */
453         ATAPI_PASS_THRU         = 3,            /* SAT pass-thru */
454         ATAPI_MISC              = 4,            /* the rest */
455 
456         /* Timing constants */
457         ATA_TIMING_SETUP        = (1 << 0),
458         ATA_TIMING_ACT8B        = (1 << 1),
459         ATA_TIMING_REC8B        = (1 << 2),
460         ATA_TIMING_CYC8B        = (1 << 3),
461         ATA_TIMING_8BIT         = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
462                                   ATA_TIMING_CYC8B,
463         ATA_TIMING_ACTIVE       = (1 << 4),
464         ATA_TIMING_RECOVER      = (1 << 5),
465         ATA_TIMING_DMACK_HOLD   = (1 << 6),
466         ATA_TIMING_CYCLE        = (1 << 7),
467         ATA_TIMING_UDMA         = (1 << 8),
468         ATA_TIMING_ALL          = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
469                                   ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
470                                   ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
471                                   ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
472                                   ATA_TIMING_UDMA,
473 
474         /* ACPI constants */
475         ATA_ACPI_FILTER_SETXFER = 1 << 0,
476         ATA_ACPI_FILTER_LOCK    = 1 << 1,
477         ATA_ACPI_FILTER_DIPM    = 1 << 2,
478         ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3,  /* FPDMA non-zero offset */
479         ATA_ACPI_FILTER_FPDMA_AA = 1 << 4,      /* FPDMA auto activate */
480 
481         ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
482                                   ATA_ACPI_FILTER_LOCK |
483                                   ATA_ACPI_FILTER_DIPM,
484 };
485 
486 enum ata_xfer_mask {
487         ATA_MASK_PIO            = ((1LU << ATA_NR_PIO_MODES) - 1)
488                                         << ATA_SHIFT_PIO,
489         ATA_MASK_MWDMA          = ((1LU << ATA_NR_MWDMA_MODES) - 1)
490                                         << ATA_SHIFT_MWDMA,
491         ATA_MASK_UDMA           = ((1LU << ATA_NR_UDMA_MODES) - 1)
492                                         << ATA_SHIFT_UDMA,
493 };
494 
495 enum hsm_task_states {
496         HSM_ST_IDLE,            /* no command on going */
497         HSM_ST_FIRST,           /* (waiting the device to)
498                                    write CDB or first data block */
499         HSM_ST,                 /* (waiting the device to) transfer data */
500         HSM_ST_LAST,            /* (waiting the device to) complete command */
501         HSM_ST_ERR,             /* error */
502 };
503 
504 enum ata_completion_errors {
505         AC_ERR_DEV              = (1 << 0), /* device reported error */
506         AC_ERR_HSM              = (1 << 1), /* host state machine violation */
507         AC_ERR_TIMEOUT          = (1 << 2), /* timeout */
508         AC_ERR_MEDIA            = (1 << 3), /* media error */
509         AC_ERR_ATA_BUS          = (1 << 4), /* ATA bus error */
510         AC_ERR_HOST_BUS         = (1 << 5), /* host bus error */
511         AC_ERR_SYSTEM           = (1 << 6), /* system error */
512         AC_ERR_INVALID          = (1 << 7), /* invalid argument */
513         AC_ERR_OTHER            = (1 << 8), /* unknown */
514         AC_ERR_NODEV_HINT       = (1 << 9), /* polling device detection hint */
515         AC_ERR_NCQ              = (1 << 10), /* marker for offending NCQ qc */
516 };
517 
518 /*
519  * Link power management policy: If you alter this, you also need to
520  * alter libata-scsi.c (for the ascii descriptions)
521  */
522 enum ata_lpm_policy {
523         ATA_LPM_UNKNOWN,
524         ATA_LPM_MAX_POWER,
525         ATA_LPM_MED_POWER,
526         ATA_LPM_MIN_POWER,
527 };
528 
529 enum ata_lpm_hints {
530         ATA_LPM_EMPTY           = (1 << 0), /* port empty/probing */
531         ATA_LPM_HIPM            = (1 << 1), /* may use HIPM */
532         ATA_LPM_WAKE_ONLY       = (1 << 2), /* only wake up link */
533 };
534 
535 /* forward declarations */
536 struct scsi_device;
537 struct ata_port_operations;
538 struct ata_port;
539 struct ata_link;
540 struct ata_queued_cmd;
541 
542 /* typedefs */
543 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
544 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
545 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
546                               unsigned long deadline);
547 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
548 
549 extern struct device_attribute dev_attr_link_power_management_policy;
550 extern struct device_attribute dev_attr_unload_heads;
551 extern struct device_attribute dev_attr_em_message_type;
552 extern struct device_attribute dev_attr_em_message;
553 extern struct device_attribute dev_attr_sw_activity;
554 
555 enum sw_activity {
556         OFF,
557         BLINK_ON,
558         BLINK_OFF,
559 };
560 
561 struct ata_taskfile {
562         unsigned long           flags;          /* ATA_TFLAG_xxx */
563         u8                      protocol;       /* ATA_PROT_xxx */
564 
565         u8                      ctl;            /* control reg */
566 
567         u8                      hob_feature;    /* additional data */
568         u8                      hob_nsect;      /* to support LBA48 */
569         u8                      hob_lbal;
570         u8                      hob_lbam;
571         u8                      hob_lbah;
572 
573         u8                      feature;
574         u8                      nsect;
575         u8                      lbal;
576         u8                      lbam;
577         u8                      lbah;
578 
579         u8                      device;
580 
581         u8                      command;        /* IO operation */
582 
583         u32                     auxiliary;      /* auxiliary field */
584                                                 /* from SATA 3.1 and */
585                                                 /* ATA-8 ACS-3 */
586 };
587 
588 #ifdef CONFIG_ATA_SFF
589 struct ata_ioports {
590         void __iomem            *cmd_addr;
591         void __iomem            *data_addr;
592         void __iomem            *error_addr;
593         void __iomem            *feature_addr;
594         void __iomem            *nsect_addr;
595         void __iomem            *lbal_addr;
596         void __iomem            *lbam_addr;
597         void __iomem            *lbah_addr;
598         void __iomem            *device_addr;
599         void __iomem            *status_addr;
600         void __iomem            *command_addr;
601         void __iomem            *altstatus_addr;
602         void __iomem            *ctl_addr;
603 #ifdef CONFIG_ATA_BMDMA
604         void __iomem            *bmdma_addr;
605 #endif /* CONFIG_ATA_BMDMA */
606         void __iomem            *scr_addr;
607 };
608 #endif /* CONFIG_ATA_SFF */
609 
610 struct ata_host {
611         spinlock_t              lock;
612         struct device           *dev;
613         void __iomem * const    *iomap;
614         unsigned int            n_ports;
615         unsigned int            n_tags;                 /* nr of NCQ tags */
616         void                    *private_data;
617         struct ata_port_operations *ops;
618         unsigned long           flags;
619 
620         struct mutex            eh_mutex;
621         struct task_struct      *eh_owner;
622 
623         struct ata_port         *simplex_claimed;       /* channel owning the DMA */
624         struct ata_port         *ports[0];
625 };
626 
627 struct ata_queued_cmd {
628         struct ata_port         *ap;
629         struct ata_device       *dev;
630 
631         struct scsi_cmnd        *scsicmd;
632         void                    (*scsidone)(struct scsi_cmnd *);
633 
634         struct ata_taskfile     tf;
635         u8                      cdb[ATAPI_CDB_LEN];
636 
637         unsigned long           flags;          /* ATA_QCFLAG_xxx */
638         unsigned int            tag;
639         unsigned int            n_elem;
640         unsigned int            orig_n_elem;
641 
642         int                     dma_dir;
643 
644         unsigned int            sect_size;
645 
646         unsigned int            nbytes;
647         unsigned int            extrabytes;
648         unsigned int            curbytes;
649 
650         struct scatterlist      sgent;
651 
652         struct scatterlist      *sg;
653 
654         struct scatterlist      *cursg;
655         unsigned int            cursg_ofs;
656 
657         unsigned int            err_mask;
658         struct ata_taskfile     result_tf;
659         ata_qc_cb_t             complete_fn;
660 
661         void                    *private_data;
662         void                    *lldd_task;
663 };
664 
665 struct ata_port_stats {
666         unsigned long           unhandled_irq;
667         unsigned long           idle_irq;
668         unsigned long           rw_reqbuf;
669 };
670 
671 struct ata_ering_entry {
672         unsigned int            eflags;
673         unsigned int            err_mask;
674         u64                     timestamp;
675 };
676 
677 struct ata_ering {
678         int                     cursor;
679         struct ata_ering_entry  ring[ATA_ERING_SIZE];
680 };
681 
682 struct ata_device {
683         struct ata_link         *link;
684         unsigned int            devno;          /* 0 or 1 */
685         unsigned int            horkage;        /* List of broken features */
686         unsigned long           flags;          /* ATA_DFLAG_xxx */
687         struct scsi_device      *sdev;          /* attached SCSI device */
688         void                    *private_data;
689 #ifdef CONFIG_ATA_ACPI
690         union acpi_object       *gtf_cache;
691         unsigned int            gtf_filter;
692 #endif
693 #ifdef CONFIG_SATA_ZPODD
694         void                    *zpodd;
695 #endif
696         struct device           tdev;
697         /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
698         u64                     n_sectors;      /* size of device, if ATA */
699         u64                     n_native_sectors; /* native size, if ATA */
700         unsigned int            class;          /* ATA_DEV_xxx */
701         unsigned long           unpark_deadline;
702 
703         u8                      pio_mode;
704         u8                      dma_mode;
705         u8                      xfer_mode;
706         unsigned int            xfer_shift;     /* ATA_SHIFT_xxx */
707 
708         unsigned int            multi_count;    /* sectors count for
709                                                    READ/WRITE MULTIPLE */
710         unsigned int            max_sectors;    /* per-device max sectors */
711         unsigned int            cdb_len;
712 
713         /* per-dev xfer mask */
714         unsigned long           pio_mask;
715         unsigned long           mwdma_mask;
716         unsigned long           udma_mask;
717 
718         /* for CHS addressing */
719         u16                     cylinders;      /* Number of cylinders */
720         u16                     heads;          /* Number of heads */
721         u16                     sectors;        /* Number of sectors per track */
722 
723         union {
724                 u16             id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
725                 u32             gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
726         } ____cacheline_aligned;
727 
728         /* DEVSLP Timing Variables from Identify Device Data Log */
729         u8                      devslp_timing[ATA_LOG_DEVSLP_SIZE];
730 
731         /* NCQ send and receive log subcommand support */
732         u8                      ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE];
733         u8                      ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_SIZE];
734 
735         /* ZAC zone configuration */
736         u32                     zac_zoned_cap;
737         u32                     zac_zones_optimal_open;
738         u32                     zac_zones_optimal_nonseq;
739         u32                     zac_zones_max_open;
740 
741         /* error history */
742         int                     spdn_cnt;
743         /* ering is CLEAR_END, read comment above CLEAR_END */
744         struct ata_ering        ering;
745 };
746 
747 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
748  * cleared to zero on ata_dev_init().
749  */
750 #define ATA_DEVICE_CLEAR_BEGIN          offsetof(struct ata_device, n_sectors)
751 #define ATA_DEVICE_CLEAR_END            offsetof(struct ata_device, ering)
752 
753 struct ata_eh_info {
754         struct ata_device       *dev;           /* offending device */
755         u32                     serror;         /* SError from LLDD */
756         unsigned int            err_mask;       /* port-wide err_mask */
757         unsigned int            action;         /* ATA_EH_* action mask */
758         unsigned int            dev_action[ATA_MAX_DEVICES]; /* dev EH action */
759         unsigned int            flags;          /* ATA_EHI_* flags */
760 
761         unsigned int            probe_mask;
762 
763         char                    desc[ATA_EH_DESC_LEN];
764         int                     desc_len;
765 };
766 
767 struct ata_eh_context {
768         struct ata_eh_info      i;
769         int                     tries[ATA_MAX_DEVICES];
770         int                     cmd_timeout_idx[ATA_MAX_DEVICES]
771                                                [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
772         unsigned int            classes[ATA_MAX_DEVICES];
773         unsigned int            did_probe_mask;
774         unsigned int            unloaded_mask;
775         unsigned int            saved_ncq_enabled;
776         u8                      saved_xfer_mode[ATA_MAX_DEVICES];
777         /* timestamp for the last reset attempt or success */
778         unsigned long           last_reset;
779 };
780 
781 struct ata_acpi_drive
782 {
783         u32 pio;
784         u32 dma;
785 } __packed;
786 
787 struct ata_acpi_gtm {
788         struct ata_acpi_drive drive[2];
789         u32 flags;
790 } __packed;
791 
792 struct ata_link {
793         struct ata_port         *ap;
794         int                     pmp;            /* port multiplier port # */
795 
796         struct device           tdev;
797         unsigned int            active_tag;     /* active tag on this link */
798         u32                     sactive;        /* active NCQ commands */
799 
800         unsigned int            flags;          /* ATA_LFLAG_xxx */
801 
802         u32                     saved_scontrol; /* SControl on probe */
803         unsigned int            hw_sata_spd_limit;
804         unsigned int            sata_spd_limit;
805         unsigned int            sata_spd;       /* current SATA PHY speed */
806         enum ata_lpm_policy     lpm_policy;
807 
808         /* record runtime error info, protected by host_set lock */
809         struct ata_eh_info      eh_info;
810         /* EH context */
811         struct ata_eh_context   eh_context;
812 
813         struct ata_device       device[ATA_MAX_DEVICES];
814 
815         unsigned long           last_lpm_change; /* when last LPM change happened */
816 };
817 #define ATA_LINK_CLEAR_BEGIN            offsetof(struct ata_link, active_tag)
818 #define ATA_LINK_CLEAR_END              offsetof(struct ata_link, device[0])
819 
820 struct ata_port {
821         struct Scsi_Host        *scsi_host; /* our co-allocated scsi host */
822         struct ata_port_operations *ops;
823         spinlock_t              *lock;
824         /* Flags owned by the EH context. Only EH should touch these once the
825            port is active */
826         unsigned long           flags;  /* ATA_FLAG_xxx */
827         /* Flags that change dynamically, protected by ap->lock */
828         unsigned int            pflags; /* ATA_PFLAG_xxx */
829         unsigned int            print_id; /* user visible unique port ID */
830         unsigned int            local_port_no; /* host local port num */
831         unsigned int            port_no; /* 0 based port no. inside the host */
832 
833 #ifdef CONFIG_ATA_SFF
834         struct ata_ioports      ioaddr; /* ATA cmd/ctl/dma register blocks */
835         u8                      ctl;    /* cache of ATA control register */
836         u8                      last_ctl;       /* Cache last written value */
837         struct ata_link*        sff_pio_task_link; /* link currently used */
838         struct delayed_work     sff_pio_task;
839 #ifdef CONFIG_ATA_BMDMA
840         struct ata_bmdma_prd    *bmdma_prd;     /* BMDMA SG list */
841         dma_addr_t              bmdma_prd_dma;  /* and its DMA mapping */
842 #endif /* CONFIG_ATA_BMDMA */
843 #endif /* CONFIG_ATA_SFF */
844 
845         unsigned int            pio_mask;
846         unsigned int            mwdma_mask;
847         unsigned int            udma_mask;
848         unsigned int            cbl;    /* cable type; ATA_CBL_xxx */
849 
850         struct ata_queued_cmd   qcmd[ATA_MAX_QUEUE];
851         unsigned long           sas_tag_allocated; /* for sas tag allocation only */
852         unsigned int            qc_active;
853         int                     nr_active_links; /* #links with active qcs */
854         unsigned int            sas_last_tag;   /* track next tag hw expects */
855 
856         struct ata_link         link;           /* host default link */
857         struct ata_link         *slave_link;    /* see ata_slave_link_init() */
858 
859         int                     nr_pmp_links;   /* nr of available PMP links */
860         struct ata_link         *pmp_link;      /* array of PMP links */
861         struct ata_link         *excl_link;     /* for PMP qc exclusion */
862 
863         struct ata_port_stats   stats;
864         struct ata_host         *host;
865         struct device           *dev;
866         struct device           tdev;
867 
868         struct mutex            scsi_scan_mutex;
869         struct delayed_work     hotplug_task;
870         struct work_struct      scsi_rescan_task;
871 
872         unsigned int            hsm_task_state;
873 
874         u32                     msg_enable;
875         struct list_head        eh_done_q;
876         wait_queue_head_t       eh_wait_q;
877         int                     eh_tries;
878         struct completion       park_req_pending;
879 
880         pm_message_t            pm_mesg;
881         enum ata_lpm_policy     target_lpm_policy;
882 
883         struct timer_list       fastdrain_timer;
884         unsigned long           fastdrain_cnt;
885 
886         int                     em_message_type;
887         void                    *private_data;
888 
889 #ifdef CONFIG_ATA_ACPI
890         struct ata_acpi_gtm     __acpi_init_gtm; /* use ata_acpi_init_gtm() */
891 #endif
892         /* owned by EH */
893         u8                      sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
894 };
895 
896 /* The following initializer overrides a method to NULL whether one of
897  * its parent has the method defined or not.  This is equivalent to
898  * ERR_PTR(-ENOENT).  Unfortunately, ERR_PTR doesn't render a constant
899  * expression and thus can't be used as an initializer.
900  */
901 #define ATA_OP_NULL             (void *)(unsigned long)(-ENOENT)
902 
903 struct ata_port_operations {
904         /*
905          * Command execution
906          */
907         int  (*qc_defer)(struct ata_queued_cmd *qc);
908         int  (*check_atapi_dma)(struct ata_queued_cmd *qc);
909         void (*qc_prep)(struct ata_queued_cmd *qc);
910         unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
911         bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
912 
913         /*
914          * Configuration and exception handling
915          */
916         int  (*cable_detect)(struct ata_port *ap);
917         unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
918         void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
919         void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
920         int  (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
921         unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
922 
923         void (*dev_config)(struct ata_device *dev);
924 
925         void (*freeze)(struct ata_port *ap);
926         void (*thaw)(struct ata_port *ap);
927         ata_prereset_fn_t       prereset;
928         ata_reset_fn_t          softreset;
929         ata_reset_fn_t          hardreset;
930         ata_postreset_fn_t      postreset;
931         ata_prereset_fn_t       pmp_prereset;
932         ata_reset_fn_t          pmp_softreset;
933         ata_reset_fn_t          pmp_hardreset;
934         ata_postreset_fn_t      pmp_postreset;
935         void (*error_handler)(struct ata_port *ap);
936         void (*lost_interrupt)(struct ata_port *ap);
937         void (*post_internal_cmd)(struct ata_queued_cmd *qc);
938         void (*sched_eh)(struct ata_port *ap);
939         void (*end_eh)(struct ata_port *ap);
940 
941         /*
942          * Optional features
943          */
944         int  (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
945         int  (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
946         void (*pmp_attach)(struct ata_port *ap);
947         void (*pmp_detach)(struct ata_port *ap);
948         int  (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
949                         unsigned hints);
950 
951         /*
952          * Start, stop, suspend and resume
953          */
954         int  (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
955         int  (*port_resume)(struct ata_port *ap);
956         int  (*port_start)(struct ata_port *ap);
957         void (*port_stop)(struct ata_port *ap);
958         void (*host_stop)(struct ata_host *host);
959 
960 #ifdef CONFIG_ATA_SFF
961         /*
962          * SFF / taskfile oriented ops
963          */
964         void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
965         void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
966         u8   (*sff_check_status)(struct ata_port *ap);
967         u8   (*sff_check_altstatus)(struct ata_port *ap);
968         void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
969         void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
970         void (*sff_exec_command)(struct ata_port *ap,
971                                  const struct ata_taskfile *tf);
972         unsigned int (*sff_data_xfer)(struct ata_device *dev,
973                         unsigned char *buf, unsigned int buflen, int rw);
974         void (*sff_irq_on)(struct ata_port *);
975         bool (*sff_irq_check)(struct ata_port *);
976         void (*sff_irq_clear)(struct ata_port *);
977         void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
978 
979 #ifdef CONFIG_ATA_BMDMA
980         void (*bmdma_setup)(struct ata_queued_cmd *qc);
981         void (*bmdma_start)(struct ata_queued_cmd *qc);
982         void (*bmdma_stop)(struct ata_queued_cmd *qc);
983         u8   (*bmdma_status)(struct ata_port *ap);
984 #endif /* CONFIG_ATA_BMDMA */
985 #endif /* CONFIG_ATA_SFF */
986 
987         ssize_t (*em_show)(struct ata_port *ap, char *buf);
988         ssize_t (*em_store)(struct ata_port *ap, const char *message,
989                             size_t size);
990         ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
991         ssize_t (*sw_activity_store)(struct ata_device *dev,
992                                      enum sw_activity val);
993         ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state,
994                                         ssize_t size);
995 
996         /*
997          * Obsolete
998          */
999         void (*phy_reset)(struct ata_port *ap);
1000         void (*eng_timeout)(struct ata_port *ap);
1001 
1002         /*
1003          * ->inherits must be the last field and all the preceding
1004          * fields must be pointers.
1005          */
1006         const struct ata_port_operations        *inherits;
1007 };
1008 
1009 struct ata_port_info {
1010         unsigned long           flags;
1011         unsigned long           link_flags;
1012         unsigned long           pio_mask;
1013         unsigned long           mwdma_mask;
1014         unsigned long           udma_mask;
1015         struct ata_port_operations *port_ops;
1016         void                    *private_data;
1017 };
1018 
1019 struct ata_timing {
1020         unsigned short mode;            /* ATA mode */
1021         unsigned short setup;           /* t1 */
1022         unsigned short act8b;           /* t2 for 8-bit I/O */
1023         unsigned short rec8b;           /* t2i for 8-bit I/O */
1024         unsigned short cyc8b;           /* t0 for 8-bit I/O */
1025         unsigned short active;          /* t2 or tD */
1026         unsigned short recover;         /* t2i or tK */
1027         unsigned short dmack_hold;      /* tj */
1028         unsigned short cycle;           /* t0 */
1029         unsigned short udma;            /* t2CYCTYP/2 */
1030 };
1031 
1032 /*
1033  * Core layer - drivers/ata/libata-core.c
1034  */
1035 extern const unsigned long sata_deb_timing_normal[];
1036 extern const unsigned long sata_deb_timing_hotplug[];
1037 extern const unsigned long sata_deb_timing_long[];
1038 
1039 extern struct ata_port_operations ata_dummy_port_ops;
1040 extern const struct ata_port_info ata_dummy_port_info;
1041 
1042 /*
1043  * protocol tests
1044  */
1045 static inline unsigned int ata_prot_flags(u8 prot)
1046 {
1047         switch (prot) {
1048         case ATA_PROT_NODATA:
1049                 return 0;
1050         case ATA_PROT_PIO:
1051                 return ATA_PROT_FLAG_PIO;
1052         case ATA_PROT_DMA:
1053                 return ATA_PROT_FLAG_DMA;
1054         case ATA_PROT_NCQ:
1055                 return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
1056         case ATAPI_PROT_NODATA:
1057                 return ATA_PROT_FLAG_ATAPI;
1058         case ATAPI_PROT_PIO:
1059                 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
1060         case ATAPI_PROT_DMA:
1061                 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
1062         }
1063         return 0;
1064 }
1065 
1066 static inline int ata_is_atapi(u8 prot)
1067 {
1068         return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
1069 }
1070 
1071 static inline int ata_is_nodata(u8 prot)
1072 {
1073         return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
1074 }
1075 
1076 static inline int ata_is_pio(u8 prot)
1077 {
1078         return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
1079 }
1080 
1081 static inline int ata_is_dma(u8 prot)
1082 {
1083         return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
1084 }
1085 
1086 static inline int ata_is_ncq(u8 prot)
1087 {
1088         return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
1089 }
1090 
1091 static inline int ata_is_data(u8 prot)
1092 {
1093         return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
1094 }
1095 
1096 static inline int is_multi_taskfile(struct ata_taskfile *tf)
1097 {
1098         return (tf->command == ATA_CMD_READ_MULTI) ||
1099                (tf->command == ATA_CMD_WRITE_MULTI) ||
1100                (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1101                (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1102                (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1103 }
1104 
1105 static inline const unsigned long *
1106 sata_ehc_deb_timing(struct ata_eh_context *ehc)
1107 {
1108         if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
1109                 return sata_deb_timing_hotplug;
1110         else
1111                 return sata_deb_timing_normal;
1112 }
1113 
1114 static inline int ata_port_is_dummy(struct ata_port *ap)
1115 {
1116         return ap->ops == &ata_dummy_port_ops;
1117 }
1118 
1119 extern int sata_set_spd(struct ata_link *link);
1120 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
1121 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
1122                                 int (*check_ready)(struct ata_link *link));
1123 extern int sata_link_debounce(struct ata_link *link,
1124                         const unsigned long *params, unsigned long deadline);
1125 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
1126                             unsigned long deadline);
1127 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
1128                              bool spm_wakeup);
1129 extern int sata_link_hardreset(struct ata_link *link,
1130                         const unsigned long *timing, unsigned long deadline,
1131                         bool *online, int (*check_ready)(struct ata_link *));
1132 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
1133                               unsigned long deadline);
1134 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1135 
1136 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
1137 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
1138                         const struct ata_port_info * const * ppi, int n_ports);
1139 extern int ata_slave_link_init(struct ata_port *ap);
1140 extern int ata_host_start(struct ata_host *host);
1141 extern int ata_host_register(struct ata_host *host,
1142                              struct scsi_host_template *sht);
1143 extern int ata_host_activate(struct ata_host *host, int irq,
1144                              irq_handler_t irq_handler, unsigned long irq_flags,
1145                              struct scsi_host_template *sht);
1146 extern void ata_host_detach(struct ata_host *host);
1147 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
1148 extern int ata_scsi_detect(struct scsi_host_template *sht);
1149 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
1150 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1151 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1152                             int cmd, void __user *arg);
1153 extern void ata_sas_port_destroy(struct ata_port *);
1154 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1155                                            struct ata_port_info *, struct Scsi_Host *);
1156 extern void ata_sas_async_probe(struct ata_port *ap);
1157 extern int ata_sas_sync_probe(struct ata_port *ap);
1158 extern int ata_sas_port_init(struct ata_port *);
1159 extern int ata_sas_port_start(struct ata_port *ap);
1160 extern void ata_sas_port_stop(struct ata_port *ap);
1161 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1162 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1163 extern int sata_scr_valid(struct ata_link *link);
1164 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1165 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1166 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1167 extern bool ata_link_online(struct ata_link *link);
1168 extern bool ata_link_offline(struct ata_link *link);
1169 #ifdef CONFIG_PM
1170 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1171 extern void ata_host_resume(struct ata_host *host);
1172 extern void ata_sas_port_suspend(struct ata_port *ap);
1173 extern void ata_sas_port_resume(struct ata_port *ap);
1174 #else
1175 static inline void ata_sas_port_suspend(struct ata_port *ap)
1176 {
1177 }
1178 static inline void ata_sas_port_resume(struct ata_port *ap)
1179 {
1180 }
1181 #endif
1182 extern int ata_ratelimit(void);
1183 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1184 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1185                         u32 val, unsigned long interval, unsigned long timeout);
1186 extern int atapi_cmd_type(u8 opcode);
1187 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1188                           u8 pmp, int is_cmd, u8 *fis);
1189 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1190 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1191                         unsigned long mwdma_mask, unsigned long udma_mask);
1192 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1193                         unsigned long *pio_mask, unsigned long *mwdma_mask,
1194                         unsigned long *udma_mask);
1195 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1196 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1197 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1198 extern const char *ata_mode_string(unsigned long xfer_mask);
1199 extern unsigned long ata_id_xfermask(const u16 *id);
1200 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1201 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1202 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1203                  unsigned int n_elem);
1204 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1205 extern void ata_dev_disable(struct ata_device *adev);
1206 extern void ata_id_string(const u16 *id, unsigned char *s,
1207                           unsigned int ofs, unsigned int len);
1208 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1209                             unsigned int ofs, unsigned int len);
1210 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1211                                         struct ata_taskfile *tf, u16 *id);
1212 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1213 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1214 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1215 extern int ata_std_bios_param(struct scsi_device *sdev,
1216                               struct block_device *bdev,
1217                               sector_t capacity, int geom[]);
1218 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1219 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1220 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1221 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1222                                        int queue_depth);
1223 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1224                                     int queue_depth);
1225 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1226 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1227 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1228 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1229 extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
1230 
1231 extern int ata_cable_40wire(struct ata_port *ap);
1232 extern int ata_cable_80wire(struct ata_port *ap);
1233 extern int ata_cable_sata(struct ata_port *ap);
1234 extern int ata_cable_ignore(struct ata_port *ap);
1235 extern int ata_cable_unknown(struct ata_port *ap);
1236 
1237 /* Timing helpers */
1238 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1239 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1240 extern int ata_timing_compute(struct ata_device *, unsigned short,
1241                               struct ata_timing *, int, int);
1242 extern void ata_timing_merge(const struct ata_timing *,
1243                              const struct ata_timing *, struct ata_timing *,
1244                              unsigned int);
1245 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1246 
1247 /* PCI */
1248 #ifdef CONFIG_PCI
1249 struct pci_dev;
1250 
1251 struct pci_bits {
1252         unsigned int            reg;    /* PCI config register to read */
1253         unsigned int            width;  /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1254         unsigned long           mask;
1255         unsigned long           val;
1256 };
1257 
1258 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1259 extern void ata_pci_remove_one(struct pci_dev *pdev);
1260 
1261 #ifdef CONFIG_PM
1262 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1263 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1264 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1265 extern int ata_pci_device_resume(struct pci_dev *pdev);
1266 #endif /* CONFIG_PM */
1267 #endif /* CONFIG_PCI */
1268 
1269 struct platform_device;
1270 
1271 extern int ata_platform_remove_one(struct platform_device *pdev);
1272 
1273 /*
1274  * ACPI - drivers/ata/libata-acpi.c
1275  */
1276 #ifdef CONFIG_ATA_ACPI
1277 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1278 {
1279         if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1280                 return &ap->__acpi_init_gtm;
1281         return NULL;
1282 }
1283 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1284 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1285 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1286                                     const struct ata_acpi_gtm *gtm);
1287 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1288 #else
1289 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1290 {
1291         return NULL;
1292 }
1293 
1294 static inline int ata_acpi_stm(const struct ata_port *ap,
1295                                struct ata_acpi_gtm *stm)
1296 {
1297         return -ENOSYS;
1298 }
1299 
1300 static inline int ata_acpi_gtm(const struct ata_port *ap,
1301                                struct ata_acpi_gtm *stm)
1302 {
1303         return -ENOSYS;
1304 }
1305 
1306 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1307                                         const struct ata_acpi_gtm *gtm)
1308 {
1309         return 0;
1310 }
1311 
1312 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1313                                       const struct ata_acpi_gtm *gtm)
1314 {
1315         return 0;
1316 }
1317 #endif
1318 
1319 /*
1320  * EH - drivers/ata/libata-eh.c
1321  */
1322 extern void ata_port_schedule_eh(struct ata_port *ap);
1323 extern void ata_port_wait_eh(struct ata_port *ap);
1324 extern int ata_link_abort(struct ata_link *link);
1325 extern int ata_port_abort(struct ata_port *ap);
1326 extern int ata_port_freeze(struct ata_port *ap);
1327 extern int sata_async_notification(struct ata_port *ap);
1328 
1329 extern void ata_eh_freeze_port(struct ata_port *ap);
1330 extern void ata_eh_thaw_port(struct ata_port *ap);
1331 
1332 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1333 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1334 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1335 
1336 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1337                       ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1338                       ata_postreset_fn_t postreset);
1339 extern void ata_std_error_handler(struct ata_port *ap);
1340 extern void ata_std_sched_eh(struct ata_port *ap);
1341 extern void ata_std_end_eh(struct ata_port *ap);
1342 extern int ata_link_nr_enabled(struct ata_link *link);
1343 
1344 /*
1345  * Base operations to inherit from and initializers for sht
1346  *
1347  * Operations
1348  *
1349  * base  : Common to all libata drivers.
1350  * sata  : SATA controllers w/ native interface.
1351  * pmp   : SATA controllers w/ PMP support.
1352  * sff   : SFF ATA controllers w/o BMDMA support.
1353  * bmdma : SFF ATA controllers w/ BMDMA support.
1354  *
1355  * sht initializers
1356  *
1357  * BASE  : Common to all libata drivers.  The user must set
1358  *         sg_tablesize and dma_boundary.
1359  * PIO   : SFF ATA controllers w/ only PIO support.
1360  * BMDMA : SFF ATA controllers w/ BMDMA support.  sg_tablesize and
1361  *         dma_boundary are set to BMDMA limits.
1362  * NCQ   : SATA controllers supporting NCQ.  The user must set
1363  *         sg_tablesize, dma_boundary and can_queue.
1364  */
1365 extern const struct ata_port_operations ata_base_port_ops;
1366 extern const struct ata_port_operations sata_port_ops;
1367 extern struct device_attribute *ata_common_sdev_attrs[];
1368 
1369 /*
1370  * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
1371  * by the edge drivers.  Because the 'module' field of sht must be the
1372  * edge driver's module reference, otherwise the driver can be unloaded
1373  * even if the scsi_device is being accessed.
1374  */
1375 #define ATA_BASE_SHT(drv_name)                                  \
1376         .module                 = THIS_MODULE,                  \
1377         .name                   = drv_name,                     \
1378         .ioctl                  = ata_scsi_ioctl,               \
1379         .queuecommand           = ata_scsi_queuecmd,            \
1380         .can_queue              = ATA_DEF_QUEUE,                \
1381         .tag_alloc_policy       = BLK_TAG_ALLOC_RR,             \
1382         .this_id                = ATA_SHT_THIS_ID,              \
1383         .emulated               = ATA_SHT_EMULATED,             \
1384         .use_clustering         = ATA_SHT_USE_CLUSTERING,       \
1385         .proc_name              = drv_name,                     \
1386         .slave_configure        = ata_scsi_slave_config,        \
1387         .slave_destroy          = ata_scsi_slave_destroy,       \
1388         .bios_param             = ata_std_bios_param,           \
1389         .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1390         .sdev_attrs             = ata_common_sdev_attrs
1391 
1392 #define ATA_NCQ_SHT(drv_name)                                   \
1393         ATA_BASE_SHT(drv_name),                                 \
1394         .change_queue_depth     = ata_scsi_change_queue_depth
1395 
1396 /*
1397  * PMP helpers
1398  */
1399 #ifdef CONFIG_SATA_PMP
1400 static inline bool sata_pmp_supported(struct ata_port *ap)
1401 {
1402         return ap->flags & ATA_FLAG_PMP;
1403 }
1404 
1405 static inline bool sata_pmp_attached(struct ata_port *ap)
1406 {
1407         return ap->nr_pmp_links != 0;
1408 }
1409 
1410 static inline int ata_is_host_link(const struct ata_link *link)
1411 {
1412         return link == &link->ap->link || link == link->ap->slave_link;
1413 }
1414 #else /* CONFIG_SATA_PMP */
1415 static inline bool sata_pmp_supported(struct ata_port *ap)
1416 {
1417         return false;
1418 }
1419 
1420 static inline bool sata_pmp_attached(struct ata_port *ap)
1421 {
1422         return false;
1423 }
1424 
1425 static inline int ata_is_host_link(const struct ata_link *link)
1426 {
1427         return 1;
1428 }
1429 #endif /* CONFIG_SATA_PMP */
1430 
1431 static inline int sata_srst_pmp(struct ata_link *link)
1432 {
1433         if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1434                 return SATA_PMP_CTRL_PORT;
1435         return link->pmp;
1436 }
1437 
1438 /*
1439  * printk helpers
1440  */
1441 __printf(3, 4)
1442 void ata_port_printk(const struct ata_port *ap, const char *level,
1443                      const char *fmt, ...);
1444 __printf(3, 4)
1445 void ata_link_printk(const struct ata_link *link, const char *level,
1446                      const char *fmt, ...);
1447 __printf(3, 4)
1448 void ata_dev_printk(const struct ata_device *dev, const char *level,
1449                     const char *fmt, ...);
1450 
1451 #define ata_port_err(ap, fmt, ...)                              \
1452         ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1453 #define ata_port_warn(ap, fmt, ...)                             \
1454         ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1455 #define ata_port_notice(ap, fmt, ...)                           \
1456         ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1457 #define ata_port_info(ap, fmt, ...)                             \
1458         ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1459 #define ata_port_dbg(ap, fmt, ...)                              \
1460         ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1461 
1462 #define ata_link_err(link, fmt, ...)                            \
1463         ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1464 #define ata_link_warn(link, fmt, ...)                           \
1465         ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1466 #define ata_link_notice(link, fmt, ...)                         \
1467         ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1468 #define ata_link_info(link, fmt, ...)                           \
1469         ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1470 #define ata_link_dbg(link, fmt, ...)                            \
1471         ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1472 
1473 #define ata_dev_err(dev, fmt, ...)                              \
1474         ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1475 #define ata_dev_warn(dev, fmt, ...)                             \
1476         ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1477 #define ata_dev_notice(dev, fmt, ...)                           \
1478         ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1479 #define ata_dev_info(dev, fmt, ...)                             \
1480         ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1481 #define ata_dev_dbg(dev, fmt, ...)                              \
1482         ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1483 
1484 void ata_print_version(const struct device *dev, const char *version);
1485 
1486 /*
1487  * ata_eh_info helpers
1488  */
1489 extern __printf(2, 3)
1490 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1491 extern __printf(2, 3)
1492 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1493 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1494 
1495 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1496 {
1497         ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1498         ehi->flags |= ATA_EHI_HOTPLUGGED;
1499         ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1500         ehi->err_mask |= AC_ERR_ATA_BUS;
1501 }
1502 
1503 /*
1504  * port description helpers
1505  */
1506 extern __printf(2, 3)
1507 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1508 #ifdef CONFIG_PCI
1509 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1510                                const char *name);
1511 #endif
1512 
1513 static inline unsigned int ata_tag_valid(unsigned int tag)
1514 {
1515         return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1516 }
1517 
1518 static inline unsigned int ata_tag_internal(unsigned int tag)
1519 {
1520         return tag == ATA_TAG_INTERNAL;
1521 }
1522 
1523 /*
1524  * device helpers
1525  */
1526 static inline unsigned int ata_class_enabled(unsigned int class)
1527 {
1528         return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1529                 class == ATA_DEV_PMP || class == ATA_DEV_SEMB ||
1530                 class == ATA_DEV_ZAC;
1531 }
1532 
1533 static inline unsigned int ata_class_disabled(unsigned int class)
1534 {
1535         return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1536                 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP ||
1537                 class == ATA_DEV_ZAC_UNSUP;
1538 }
1539 
1540 static inline unsigned int ata_class_absent(unsigned int class)
1541 {
1542         return !ata_class_enabled(class) && !ata_class_disabled(class);
1543 }
1544 
1545 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1546 {
1547         return ata_class_enabled(dev->class);
1548 }
1549 
1550 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1551 {
1552         return ata_class_disabled(dev->class);
1553 }
1554 
1555 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1556 {
1557         return ata_class_absent(dev->class);
1558 }
1559 
1560 /*
1561  * link helpers
1562  */
1563 static inline int ata_link_max_devices(const struct ata_link *link)
1564 {
1565         if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1566                 return 2;
1567         return 1;
1568 }
1569 
1570 static inline int ata_link_active(struct ata_link *link)
1571 {
1572         return ata_tag_valid(link->active_tag) || link->sactive;
1573 }
1574 
1575 /*
1576  * Iterators
1577  *
1578  * ATA_LITER_* constants are used to select link iteration mode and
1579  * ATA_DITER_* device iteration mode.
1580  *
1581  * For a custom iteration directly using ata_{link|dev}_next(), if
1582  * @link or @dev, respectively, is NULL, the first element is
1583  * returned.  @dev and @link can be any valid device or link and the
1584  * next element according to the iteration mode will be returned.
1585  * After the last element, NULL is returned.
1586  */
1587 enum ata_link_iter_mode {
1588         ATA_LITER_EDGE,         /* if present, PMP links only; otherwise,
1589                                  * host link.  no slave link */
1590         ATA_LITER_HOST_FIRST,   /* host link followed by PMP or slave links */
1591         ATA_LITER_PMP_FIRST,    /* PMP links followed by host link,
1592                                  * slave link still comes after host link */
1593 };
1594 
1595 enum ata_dev_iter_mode {
1596         ATA_DITER_ENABLED,
1597         ATA_DITER_ENABLED_REVERSE,
1598         ATA_DITER_ALL,
1599         ATA_DITER_ALL_REVERSE,
1600 };
1601 
1602 extern struct ata_link *ata_link_next(struct ata_link *link,
1603                                       struct ata_port *ap,
1604                                       enum ata_link_iter_mode mode);
1605 
1606 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1607                                        struct ata_link *link,
1608                                        enum ata_dev_iter_mode mode);
1609 
1610 /*
1611  * Shortcut notation for iterations
1612  *
1613  * ata_for_each_link() iterates over each link of @ap according to
1614  * @mode.  @link points to the current link in the loop.  @link is
1615  * NULL after loop termination.  ata_for_each_dev() works the same way
1616  * except that it iterates over each device of @link.
1617  *
1618  * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1619  * specified when using the following shorthand notations.  Only the
1620  * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1621  * specified.  This not only increases brevity but also makes it
1622  * impossible to use ATA_LITER_* for device iteration or vice-versa.
1623  */
1624 #define ata_for_each_link(link, ap, mode) \
1625         for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1626              (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1627 
1628 #define ata_for_each_dev(dev, link, mode) \
1629         for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1630              (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1631 
1632 /**
1633  *      ata_ncq_enabled - Test whether NCQ is enabled
1634  *      @dev: ATA device to test for
1635  *
1636  *      LOCKING:
1637  *      spin_lock_irqsave(host lock)
1638  *
1639  *      RETURNS:
1640  *      1 if NCQ is enabled for @dev, 0 otherwise.
1641  */
1642 static inline int ata_ncq_enabled(struct ata_device *dev)
1643 {
1644         return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1645                               ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1646 }
1647 
1648 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev)
1649 {
1650         return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1651                 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &
1652                  ATA_LOG_NCQ_SEND_RECV_DSM_TRIM);
1653 }
1654 
1655 static inline bool ata_fpdma_read_log_supported(struct ata_device *dev)
1656 {
1657         return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1658                 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET] &
1659                  ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED);
1660 }
1661 
1662 static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev)
1663 {
1664         return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1665                 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] &
1666                 ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED);
1667 }
1668 
1669 static inline bool ata_fpdma_zac_mgmt_out_supported(struct ata_device *dev)
1670 {
1671         return (dev->ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OFFSET] &
1672                 ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OUT);
1673 }
1674 
1675 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1676 {
1677         qc->tf.ctl |= ATA_NIEN;
1678 }
1679 
1680 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1681                                                        unsigned int tag)
1682 {
1683         if (likely(ata_tag_valid(tag)))
1684                 return &ap->qcmd[tag];
1685         return NULL;
1686 }
1687 
1688 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1689                                                      unsigned int tag)
1690 {
1691         struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1692 
1693         if (unlikely(!qc) || !ap->ops->error_handler)
1694                 return qc;
1695 
1696         if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1697                           ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1698                 return qc;
1699 
1700         return NULL;
1701 }
1702 
1703 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1704 {
1705         return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1706 }
1707 
1708 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1709 {
1710         memset(tf, 0, sizeof(*tf));
1711 
1712 #ifdef CONFIG_ATA_SFF
1713         tf->ctl = dev->link->ap->ctl;
1714 #else
1715         tf->ctl = ATA_DEVCTL_OBS;
1716 #endif
1717         if (dev->devno == 0)
1718                 tf->device = ATA_DEVICE_OBS;
1719         else
1720                 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1721 }
1722 
1723 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1724 {
1725         qc->dma_dir = DMA_NONE;
1726         qc->sg = NULL;
1727         qc->flags = 0;
1728         qc->cursg = NULL;
1729         qc->cursg_ofs = 0;
1730         qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1731         qc->n_elem = 0;
1732         qc->err_mask = 0;
1733         qc->sect_size = ATA_SECT_SIZE;
1734 
1735         ata_tf_init(qc->dev, &qc->tf);
1736 
1737         /* init result_tf such that it indicates normal completion */
1738         qc->result_tf.command = ATA_DRDY;
1739         qc->result_tf.feature = 0;
1740 }
1741 
1742 static inline int ata_try_flush_cache(const struct ata_device *dev)
1743 {
1744         return ata_id_wcache_enabled(dev->id) ||
1745                ata_id_has_flush(dev->id) ||
1746                ata_id_has_flush_ext(dev->id);
1747 }
1748 
1749 static inline unsigned int ac_err_mask(u8 status)
1750 {
1751         if (status & (ATA_BUSY | ATA_DRQ))
1752                 return AC_ERR_HSM;
1753         if (status & (ATA_ERR | ATA_DF))
1754                 return AC_ERR_DEV;
1755         return 0;
1756 }
1757 
1758 static inline unsigned int __ac_err_mask(u8 status)
1759 {
1760         unsigned int mask = ac_err_mask(status);
1761         if (mask == 0)
1762                 return AC_ERR_OTHER;
1763         return mask;
1764 }
1765 
1766 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1767 {
1768         return *(struct ata_port **)&host->hostdata[0];
1769 }
1770 
1771 static inline int ata_check_ready(u8 status)
1772 {
1773         if (!(status & ATA_BUSY))
1774                 return 1;
1775 
1776         /* 0xff indicates either no device or device not ready */
1777         if (status == 0xff)
1778                 return -ENODEV;
1779 
1780         return 0;
1781 }
1782 
1783 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1784                                          unsigned long timeout_msecs)
1785 {
1786         return from_jiffies + msecs_to_jiffies(timeout_msecs);
1787 }
1788 
1789 /* Don't open code these in drivers as there are traps. Firstly the range may
1790    change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1791    > UDMA_0. Dyma ddreigiau */
1792 
1793 static inline int ata_using_mwdma(struct ata_device *adev)
1794 {
1795         if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1796                 return 1;
1797         return 0;
1798 }
1799 
1800 static inline int ata_using_udma(struct ata_device *adev)
1801 {
1802         if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1803                 return 1;
1804         return 0;
1805 }
1806 
1807 static inline int ata_dma_enabled(struct ata_device *adev)
1808 {
1809         return (adev->dma_mode == 0xFF ? 0 : 1);
1810 }
1811 
1812 /**************************************************************************
1813  * PMP - drivers/ata/libata-pmp.c
1814  */
1815 #ifdef CONFIG_SATA_PMP
1816 
1817 extern const struct ata_port_operations sata_pmp_port_ops;
1818 
1819 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1820 extern void sata_pmp_error_handler(struct ata_port *ap);
1821 
1822 #else /* CONFIG_SATA_PMP */
1823 
1824 #define sata_pmp_port_ops               sata_port_ops
1825 #define sata_pmp_qc_defer_cmd_switch    ata_std_qc_defer
1826 #define sata_pmp_error_handler          ata_std_error_handler
1827 
1828 #endif /* CONFIG_SATA_PMP */
1829 
1830 
1831 /**************************************************************************
1832  * SFF - drivers/ata/libata-sff.c
1833  */
1834 #ifdef CONFIG_ATA_SFF
1835 
1836 extern const struct ata_port_operations ata_sff_port_ops;
1837 extern const struct ata_port_operations ata_bmdma32_port_ops;
1838 
1839 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1840 #define ATA_PIO_SHT(drv_name)                                   \
1841         ATA_BASE_SHT(drv_name),                                 \
1842         .sg_tablesize           = LIBATA_MAX_PRD,               \
1843         .dma_boundary           = ATA_DMA_BOUNDARY
1844 
1845 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1846 extern u8 ata_sff_check_status(struct ata_port *ap);
1847 extern void ata_sff_pause(struct ata_port *ap);
1848 extern void ata_sff_dma_pause(struct ata_port *ap);
1849 extern int ata_sff_busy_sleep(struct ata_port *ap,
1850                               unsigned long timeout_pat, unsigned long timeout);
1851 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1852 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1853 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1854 extern void ata_sff_exec_command(struct ata_port *ap,
1855                                  const struct ata_taskfile *tf);
1856 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1857                         unsigned char *buf, unsigned int buflen, int rw);
1858 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1859                         unsigned char *buf, unsigned int buflen, int rw);
1860 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1861                         unsigned char *buf, unsigned int buflen, int rw);
1862 extern void ata_sff_irq_on(struct ata_port *ap);
1863 extern void ata_sff_irq_clear(struct ata_port *ap);
1864 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1865                             u8 status, int in_wq);
1866 extern void ata_sff_queue_work(struct work_struct *work);
1867 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1868                 unsigned long delay);
1869 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1870 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1871 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1872 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1873                                       struct ata_queued_cmd *qc);
1874 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1875 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1876 extern void ata_sff_freeze(struct ata_port *ap);
1877 extern void ata_sff_thaw(struct ata_port *ap);
1878 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1879 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1880                                           u8 *r_err);
1881 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1882                                     unsigned long deadline);
1883 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1884                              unsigned long deadline);
1885 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1886                                unsigned long deadline);
1887 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1888 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1889 extern void ata_sff_error_handler(struct ata_port *ap);
1890 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1891 #ifdef CONFIG_PCI
1892 extern int ata_pci_sff_init_host(struct ata_host *host);
1893 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1894                                     const struct ata_port_info * const * ppi,
1895                                     struct ata_host **r_host);
1896 extern int ata_pci_sff_activate_host(struct ata_host *host,
1897                                      irq_handler_t irq_handler,
1898                                      struct scsi_host_template *sht);
1899 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1900                 const struct ata_port_info * const * ppi,
1901                 struct scsi_host_template *sht, void *host_priv, int hflags);
1902 #endif /* CONFIG_PCI */
1903 
1904 #ifdef CONFIG_ATA_BMDMA
1905 
1906 extern const struct ata_port_operations ata_bmdma_port_ops;
1907 
1908 #define ATA_BMDMA_SHT(drv_name)                                 \
1909         ATA_BASE_SHT(drv_name),                                 \
1910         .sg_tablesize           = LIBATA_MAX_PRD,               \
1911         .dma_boundary           = ATA_DMA_BOUNDARY
1912 
1913 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1914 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1915 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1916 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1917                                       struct ata_queued_cmd *qc);
1918 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1919 extern void ata_bmdma_error_handler(struct ata_port *ap);
1920 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1921 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1922 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1923 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1924 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1925 extern u8 ata_bmdma_status(struct ata_port *ap);
1926 extern int ata_bmdma_port_start(struct ata_port *ap);
1927 extern int ata_bmdma_port_start32(struct ata_port *ap);
1928 
1929 #ifdef CONFIG_PCI
1930 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1931 extern void ata_pci_bmdma_init(struct ata_host *host);
1932 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1933                                       const struct ata_port_info * const * ppi,
1934                                       struct ata_host **r_host);
1935 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1936                                   const struct ata_port_info * const * ppi,
1937                                   struct scsi_host_template *sht,
1938                                   void *host_priv, int hflags);
1939 #endif /* CONFIG_PCI */
1940 #endif /* CONFIG_ATA_BMDMA */
1941 
1942 /**
1943  *      ata_sff_busy_wait - Wait for a port status register
1944  *      @ap: Port to wait for.
1945  *      @bits: bits that must be clear
1946  *      @max: number of 10uS waits to perform
1947  *
1948  *      Waits up to max*10 microseconds for the selected bits in the port's
1949  *      status register to be cleared.
1950  *      Returns final value of status register.
1951  *
1952  *      LOCKING:
1953  *      Inherited from caller.
1954  */
1955 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1956                                    unsigned int max)
1957 {
1958         u8 status;
1959 
1960         do {
1961                 udelay(10);
1962                 status = ap->ops->sff_check_status(ap);
1963                 max--;
1964         } while (status != 0xff && (status & bits) && (max > 0));
1965 
1966         return status;
1967 }
1968 
1969 /**
1970  *      ata_wait_idle - Wait for a port to be idle.
1971  *      @ap: Port to wait for.
1972  *
1973  *      Waits up to 10ms for port's BUSY and DRQ signals to clear.
1974  *      Returns final value of status register.
1975  *
1976  *      LOCKING:
1977  *      Inherited from caller.
1978  */
1979 static inline u8 ata_wait_idle(struct ata_port *ap)
1980 {
1981         u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1982 
1983 #ifdef ATA_DEBUG
1984         if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1985                 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1986                                 status);
1987 #endif
1988 
1989         return status;
1990 }
1991 #endif /* CONFIG_ATA_SFF */
1992 
1993 #endif /* __LINUX_LIBATA_H__ */
1994 

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