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

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