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

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