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

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