~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

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

Version: ~ [ linux-5.12-rc7 ] ~ [ linux-5.11.13 ] ~ [ linux-5.10.29 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.111 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.186 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.230 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.266 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.266 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* SPDX-License-Identifier: GPL-2.0-or-later */
  2 /*
  3  *  Copyright 2003-2005 Red Hat, Inc.  All rights reserved.
  4  *  Copyright 2003-2005 Jeff Garzik
  5  *
  6  *  libata documentation is available via 'make {ps|pdf}docs',
  7  *  as Documentation/driver-api/libata.rst
  8  */
  9 
 10 #ifndef __LINUX_LIBATA_H__
 11 #define __LINUX_LIBATA_H__
 12 
 13 #include <linux/delay.h>
 14 #include <linux/jiffies.h>
 15 #include <linux/interrupt.h>
 16 #include <linux/dma-mapping.h>
 17 #include <linux/scatterlist.h>
 18 #include <linux/io.h>
 19 #include <linux/ata.h>
 20 #include <linux/workqueue.h>
 21 #include <scsi/scsi_host.h>
 22 #include <linux/acpi.h>
 23 #include <linux/cdrom.h>
 24 #include <linux/sched.h>
 25 
 26 /*
 27  * Define if arch has non-standard setup.  This is a _PCI_ standard
 28  * not a legacy or ISA standard.
 29  */
 30 #ifdef CONFIG_ATA_NONSTANDARD
 31 #include <asm/libata-portmap.h>
 32 #else
 33 #define ATA_PRIMARY_IRQ(dev)    14
 34 #define ATA_SECONDARY_IRQ(dev)  15
 35 #endif
 36 
 37 /*
 38  * compile-time options: to be removed as soon as all the drivers are
 39  * converted to the new debugging mechanism
 40  */
 41 #undef ATA_DEBUG                /* debugging output */
 42 #undef ATA_VERBOSE_DEBUG        /* yet more debugging output */
 43 #undef ATA_IRQ_TRAP             /* define to ack screaming irqs */
 44 #undef ATA_NDEBUG               /* define to disable quick runtime checks */
 45 
 46 
 47 /* note: prints function name for you */
 48 #ifdef ATA_DEBUG
 49 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
 50 #ifdef ATA_VERBOSE_DEBUG
 51 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
 52 #else
 53 #define VPRINTK(fmt, args...)
 54 #endif  /* ATA_VERBOSE_DEBUG */
 55 #else
 56 #define DPRINTK(fmt, args...)
 57 #define VPRINTK(fmt, args...)
 58 #endif  /* ATA_DEBUG */
 59 
 60 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
 61 
 62 #define ata_print_version_once(dev, version)                    \
 63 ({                                                              \
 64         static bool __print_once;                               \
 65                                                                 \
 66         if (!__print_once) {                                    \
 67                 __print_once = true;                            \
 68                 ata_print_version(dev, version);                \
 69         }                                                       \
 70 })
 71 
 72 /* NEW: debug levels */
 73 #define HAVE_LIBATA_MSG 1
 74 
 75 enum {
 76         ATA_MSG_DRV     = 0x0001,
 77         ATA_MSG_INFO    = 0x0002,
 78         ATA_MSG_PROBE   = 0x0004,
 79         ATA_MSG_WARN    = 0x0008,
 80         ATA_MSG_MALLOC  = 0x0010,
 81         ATA_MSG_CTL     = 0x0020,
 82         ATA_MSG_INTR    = 0x0040,
 83         ATA_MSG_ERR     = 0x0080,
 84 };
 85 
 86 #define ata_msg_drv(p)    ((p)->msg_enable & ATA_MSG_DRV)
 87 #define ata_msg_info(p)   ((p)->msg_enable & ATA_MSG_INFO)
 88 #define ata_msg_probe(p)  ((p)->msg_enable & ATA_MSG_PROBE)
 89 #define ata_msg_warn(p)   ((p)->msg_enable & ATA_MSG_WARN)
 90 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
 91 #define ata_msg_ctl(p)    ((p)->msg_enable & ATA_MSG_CTL)
 92 #define ata_msg_intr(p)   ((p)->msg_enable & ATA_MSG_INTR)
 93 #define ata_msg_err(p)    ((p)->msg_enable & ATA_MSG_ERR)
 94 
 95 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
 96 {
 97         if (dval < 0 || dval >= (sizeof(u32) * 8))
 98                 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
 99         if (!dval)
100                 return 0;
101         return (1 << dval) - 1;
102 }
103 
104 /* defines only for the constants which don't work well as enums */
105 #define ATA_TAG_POISON          0xfafbfcfdU
106 
107 enum {
108         /* various global constants */
109         LIBATA_MAX_PRD          = ATA_MAX_PRD / 2,
110         LIBATA_DUMB_MAX_PRD     = ATA_MAX_PRD / 4,      /* Worst case */
111         ATA_DEF_QUEUE           = 1,
112         ATA_MAX_QUEUE           = 32,
113         ATA_TAG_INTERNAL        = ATA_MAX_QUEUE,
114         ATA_SHORT_PAUSE         = 16,
115 
116         ATAPI_MAX_DRAIN         = 16 << 10,
117 
118         ATA_ALL_DEVICES         = (1 << ATA_MAX_DEVICES) - 1,
119 
120         ATA_SHT_EMULATED        = 1,
121         ATA_SHT_THIS_ID         = -1,
122 
123         /* struct ata_taskfile flags */
124         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
125         ATA_TFLAG_ISADDR        = (1 << 1), /* enable r/w to nsect/lba regs */
126         ATA_TFLAG_DEVICE        = (1 << 2), /* enable r/w to device reg */
127         ATA_TFLAG_WRITE         = (1 << 3), /* data dir: host->dev==1 (write) */
128         ATA_TFLAG_LBA           = (1 << 4), /* enable LBA */
129         ATA_TFLAG_FUA           = (1 << 5), /* enable FUA */
130         ATA_TFLAG_POLLING       = (1 << 6), /* set nIEN to 1 and use polling */
131 
132         /* struct ata_device stuff */
133         ATA_DFLAG_LBA           = (1 << 0), /* device supports LBA */
134         ATA_DFLAG_LBA48         = (1 << 1), /* device supports LBA48 */
135         ATA_DFLAG_CDB_INTR      = (1 << 2), /* device asserts INTRQ when ready for CDB */
136         ATA_DFLAG_NCQ           = (1 << 3), /* device supports NCQ */
137         ATA_DFLAG_FLUSH_EXT     = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
138         ATA_DFLAG_ACPI_PENDING  = (1 << 5), /* ACPI resume action pending */
139         ATA_DFLAG_ACPI_FAILED   = (1 << 6), /* ACPI on devcfg has failed */
140         ATA_DFLAG_AN            = (1 << 7), /* AN configured */
141         ATA_DFLAG_TRUSTED       = (1 << 8), /* device supports trusted send/recv */
142         ATA_DFLAG_DMADIR        = (1 << 10), /* device requires DMADIR */
143         ATA_DFLAG_CFG_MASK      = (1 << 12) - 1,
144 
145         ATA_DFLAG_PIO           = (1 << 12), /* device limited to PIO mode */
146         ATA_DFLAG_NCQ_OFF       = (1 << 13), /* device limited to non-NCQ mode */
147         ATA_DFLAG_SLEEPING      = (1 << 15), /* device is sleeping */
148         ATA_DFLAG_DUBIOUS_XFER  = (1 << 16), /* data transfer not verified */
149         ATA_DFLAG_NO_UNLOAD     = (1 << 17), /* device doesn't support unload */
150         ATA_DFLAG_UNLOCK_HPA    = (1 << 18), /* unlock HPA */
151         ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */
152         ATA_DFLAG_NCQ_PRIO      = (1 << 20), /* device supports NCQ priority */
153         ATA_DFLAG_NCQ_PRIO_ENABLE = (1 << 21), /* Priority cmds sent to dev */
154         ATA_DFLAG_INIT_MASK     = (1 << 24) - 1,
155 
156         ATA_DFLAG_DETACH        = (1 << 24),
157         ATA_DFLAG_DETACHED      = (1 << 25),
158 
159         ATA_DFLAG_DA            = (1 << 26), /* device supports Device Attention */
160         ATA_DFLAG_DEVSLP        = (1 << 27), /* device supports Device Sleep */
161         ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
162         ATA_DFLAG_D_SENSE       = (1 << 29), /* Descriptor sense requested */
163         ATA_DFLAG_ZAC           = (1 << 30), /* ZAC device */
164 
165         ATA_DEV_UNKNOWN         = 0,    /* unknown device */
166         ATA_DEV_ATA             = 1,    /* ATA device */
167         ATA_DEV_ATA_UNSUP       = 2,    /* ATA device (unsupported) */
168         ATA_DEV_ATAPI           = 3,    /* ATAPI device */
169         ATA_DEV_ATAPI_UNSUP     = 4,    /* ATAPI device (unsupported) */
170         ATA_DEV_PMP             = 5,    /* SATA port multiplier */
171         ATA_DEV_PMP_UNSUP       = 6,    /* SATA port multiplier (unsupported) */
172         ATA_DEV_SEMB            = 7,    /* SEMB */
173         ATA_DEV_SEMB_UNSUP      = 8,    /* SEMB (unsupported) */
174         ATA_DEV_ZAC             = 9,    /* ZAC device */
175         ATA_DEV_ZAC_UNSUP       = 10,   /* ZAC device (unsupported) */
176         ATA_DEV_NONE            = 11,   /* no device */
177 
178         /* struct ata_link flags */
179         ATA_LFLAG_NO_HRST       = (1 << 1), /* avoid hardreset */
180         ATA_LFLAG_NO_SRST       = (1 << 2), /* avoid softreset */
181         ATA_LFLAG_ASSUME_ATA    = (1 << 3), /* assume ATA class */
182         ATA_LFLAG_ASSUME_SEMB   = (1 << 4), /* assume SEMB class */
183         ATA_LFLAG_ASSUME_CLASS  = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
184         ATA_LFLAG_NO_RETRY      = (1 << 5), /* don't retry this link */
185         ATA_LFLAG_DISABLED      = (1 << 6), /* link is disabled */
186         ATA_LFLAG_SW_ACTIVITY   = (1 << 7), /* keep activity stats */
187         ATA_LFLAG_NO_LPM        = (1 << 8), /* disable LPM on this link */
188         ATA_LFLAG_RST_ONCE      = (1 << 9), /* limit recovery to one reset */
189         ATA_LFLAG_CHANGED       = (1 << 10), /* LPM state changed on this link */
190         ATA_LFLAG_NO_DB_DELAY   = (1 << 11), /* no debounce delay on link resume */
191 
192         /* struct ata_port flags */
193         ATA_FLAG_SLAVE_POSS     = (1 << 0), /* host supports slave dev */
194                                             /* (doesn't imply presence) */
195         ATA_FLAG_SATA           = (1 << 1),
196         ATA_FLAG_NO_LPM         = (1 << 2), /* host not happy with LPM */
197         ATA_FLAG_NO_LOG_PAGE    = (1 << 5), /* do not issue log page read */
198         ATA_FLAG_NO_ATAPI       = (1 << 6), /* No ATAPI support */
199         ATA_FLAG_PIO_DMA        = (1 << 7), /* PIO cmds via DMA */
200         ATA_FLAG_PIO_LBA48      = (1 << 8), /* Host DMA engine is LBA28 only */
201         ATA_FLAG_PIO_POLLING    = (1 << 9), /* use polling PIO if LLD
202                                              * doesn't handle PIO interrupts */
203         ATA_FLAG_NCQ            = (1 << 10), /* host supports NCQ */
204         ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
205         ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
206         ATA_FLAG_DEBUGMSG       = (1 << 13),
207         ATA_FLAG_FPDMA_AA               = (1 << 14), /* driver supports Auto-Activate */
208         ATA_FLAG_IGN_SIMPLEX    = (1 << 15), /* ignore SIMPLEX */
209         ATA_FLAG_NO_IORDY       = (1 << 16), /* controller lacks iordy */
210         ATA_FLAG_ACPI_SATA      = (1 << 17), /* need native SATA ACPI layout */
211         ATA_FLAG_AN             = (1 << 18), /* controller supports AN */
212         ATA_FLAG_PMP            = (1 << 19), /* controller supports PMP */
213         ATA_FLAG_FPDMA_AUX      = (1 << 20), /* controller supports H2DFIS aux field */
214         ATA_FLAG_EM             = (1 << 21), /* driver supports enclosure
215                                               * management */
216         ATA_FLAG_SW_ACTIVITY    = (1 << 22), /* driver supports sw activity
217                                               * led */
218         ATA_FLAG_NO_DIPM        = (1 << 23), /* host not happy with DIPM */
219         ATA_FLAG_SAS_HOST       = (1 << 24), /* SAS host */
220 
221         /* bits 24:31 of ap->flags are reserved for LLD specific flags */
222 
223 
224         /* struct ata_port pflags */
225         ATA_PFLAG_EH_PENDING    = (1 << 0), /* EH pending */
226         ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
227         ATA_PFLAG_FROZEN        = (1 << 2), /* port is frozen */
228         ATA_PFLAG_RECOVERED     = (1 << 3), /* recovery action performed */
229         ATA_PFLAG_LOADING       = (1 << 4), /* boot/loading probe */
230         ATA_PFLAG_SCSI_HOTPLUG  = (1 << 6), /* SCSI hotplug scheduled */
231         ATA_PFLAG_INITIALIZING  = (1 << 7), /* being initialized, don't touch */
232         ATA_PFLAG_RESETTING     = (1 << 8), /* reset in progress */
233         ATA_PFLAG_UNLOADING     = (1 << 9), /* driver is being unloaded */
234         ATA_PFLAG_UNLOADED      = (1 << 10), /* driver is unloaded */
235 
236         ATA_PFLAG_SUSPENDED     = (1 << 17), /* port is suspended (power) */
237         ATA_PFLAG_PM_PENDING    = (1 << 18), /* PM operation pending */
238         ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
239 
240         ATA_PFLAG_PIO32         = (1 << 20),  /* 32bit PIO */
241         ATA_PFLAG_PIO32CHANGE   = (1 << 21),  /* 32bit PIO can be turned on/off */
242         ATA_PFLAG_EXTERNAL      = (1 << 22),  /* eSATA/external port */
243 
244         /* struct ata_queued_cmd flags */
245         ATA_QCFLAG_ACTIVE       = (1 << 0), /* cmd not yet ack'd to scsi lyer */
246         ATA_QCFLAG_DMAMAP       = (1 << 1), /* SG table is DMA mapped */
247         ATA_QCFLAG_IO           = (1 << 3), /* standard IO command */
248         ATA_QCFLAG_RESULT_TF    = (1 << 4), /* result TF requested */
249         ATA_QCFLAG_CLEAR_EXCL   = (1 << 5), /* clear excl_link on completion */
250         ATA_QCFLAG_QUIET        = (1 << 6), /* don't report device error */
251         ATA_QCFLAG_RETRY        = (1 << 7), /* retry after failure */
252 
253         ATA_QCFLAG_FAILED       = (1 << 16), /* cmd failed and is owned by EH */
254         ATA_QCFLAG_SENSE_VALID  = (1 << 17), /* sense data valid */
255         ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
256 
257         /* host set flags */
258         ATA_HOST_SIMPLEX        = (1 << 0),     /* Host is simplex, one DMA channel per host only */
259         ATA_HOST_STARTED        = (1 << 1),     /* Host started */
260         ATA_HOST_PARALLEL_SCAN  = (1 << 2),     /* Ports on this host can be scanned in parallel */
261         ATA_HOST_IGNORE_ATA     = (1 << 3),     /* Ignore ATA devices on this host. */
262 
263         /* bits 24:31 of host->flags are reserved for LLD specific flags */
264 
265         /* various lengths of time */
266         ATA_TMOUT_BOOT          = 30000,        /* heuristic */
267         ATA_TMOUT_BOOT_QUICK    =  7000,        /* heuristic */
268         ATA_TMOUT_INTERNAL_QUICK = 5000,
269         ATA_TMOUT_MAX_PARK      = 30000,
270 
271         /*
272          * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms.  2s
273          * is too much without parallel probing.  Use 2s if parallel
274          * probing is available, 800ms otherwise.
275          */
276         ATA_TMOUT_FF_WAIT_LONG  =  2000,
277         ATA_TMOUT_FF_WAIT       =   800,
278 
279         /* Spec mandates to wait for ">= 2ms" before checking status
280          * after reset.  We wait 150ms, because that was the magic
281          * delay used for ATAPI devices in Hale Landis's ATADRVR, for
282          * the period of time between when the ATA command register is
283          * written, and then status is checked.  Because waiting for
284          * "a while" before checking status is fine, post SRST, we
285          * perform this magic delay here as well.
286          *
287          * Old drivers/ide uses the 2mS rule and then waits for ready.
288          */
289         ATA_WAIT_AFTER_RESET    =  150,
290 
291         /* If PMP is supported, we have to do follow-up SRST.  As some
292          * PMPs don't send D2H Reg FIS after hardreset, LLDs are
293          * advised to wait only for the following duration before
294          * doing SRST.
295          */
296         ATA_TMOUT_PMP_SRST_WAIT = 5000,
297 
298         /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
299          * be a spurious PHY event, so ignore the first PHY event that
300          * occurs within 10s after the policy change.
301          */
302         ATA_TMOUT_SPURIOUS_PHY  = 10000,
303 
304         /* ATA bus states */
305         BUS_UNKNOWN             = 0,
306         BUS_DMA                 = 1,
307         BUS_IDLE                = 2,
308         BUS_NOINTR              = 3,
309         BUS_NODATA              = 4,
310         BUS_TIMER               = 5,
311         BUS_PIO                 = 6,
312         BUS_EDD                 = 7,
313         BUS_IDENTIFY            = 8,
314         BUS_PACKET              = 9,
315 
316         /* SATA port states */
317         PORT_UNKNOWN            = 0,
318         PORT_ENABLED            = 1,
319         PORT_DISABLED           = 2,
320 
321         /* encoding various smaller bitmaps into a single
322          * unsigned long bitmap
323          */
324         ATA_NR_PIO_MODES        = 7,
325         ATA_NR_MWDMA_MODES      = 5,
326         ATA_NR_UDMA_MODES       = 8,
327 
328         ATA_SHIFT_PIO           = 0,
329         ATA_SHIFT_MWDMA         = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
330         ATA_SHIFT_UDMA          = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
331         ATA_SHIFT_PRIO          = 6,
332 
333         ATA_PRIO_HIGH           = 2,
334         /* size of buffer to pad xfers ending on unaligned boundaries */
335         ATA_DMA_PAD_SZ          = 4,
336 
337         /* ering size */
338         ATA_ERING_SIZE          = 32,
339 
340         /* return values for ->qc_defer */
341         ATA_DEFER_LINK          = 1,
342         ATA_DEFER_PORT          = 2,
343 
344         /* desc_len for ata_eh_info and context */
345         ATA_EH_DESC_LEN         = 80,
346 
347         /* reset / recovery action types */
348         ATA_EH_REVALIDATE       = (1 << 0),
349         ATA_EH_SOFTRESET        = (1 << 1), /* meaningful only in ->prereset */
350         ATA_EH_HARDRESET        = (1 << 2), /* meaningful only in ->prereset */
351         ATA_EH_RESET            = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
352         ATA_EH_ENABLE_LINK      = (1 << 3),
353         ATA_EH_PARK             = (1 << 5), /* unload heads and stop I/O */
354 
355         ATA_EH_PERDEV_MASK      = ATA_EH_REVALIDATE | ATA_EH_PARK,
356         ATA_EH_ALL_ACTIONS      = ATA_EH_REVALIDATE | ATA_EH_RESET |
357                                   ATA_EH_ENABLE_LINK,
358 
359         /* ata_eh_info->flags */
360         ATA_EHI_HOTPLUGGED      = (1 << 0),  /* could have been hotplugged */
361         ATA_EHI_NO_AUTOPSY      = (1 << 2),  /* no autopsy */
362         ATA_EHI_QUIET           = (1 << 3),  /* be quiet */
363         ATA_EHI_NO_RECOVERY     = (1 << 4),  /* no recovery */
364 
365         ATA_EHI_DID_SOFTRESET   = (1 << 16), /* already soft-reset this port */
366         ATA_EHI_DID_HARDRESET   = (1 << 17), /* already soft-reset this port */
367         ATA_EHI_PRINTINFO       = (1 << 18), /* print configuration info */
368         ATA_EHI_SETMODE         = (1 << 19), /* configure transfer mode */
369         ATA_EHI_POST_SETMODE    = (1 << 20), /* revalidating after setmode */
370 
371         ATA_EHI_DID_RESET       = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
372 
373         /* mask of flags to transfer *to* the slave link */
374         ATA_EHI_TO_SLAVE_MASK   = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
375 
376         /* max tries if error condition is still set after ->error_handler */
377         ATA_EH_MAX_TRIES        = 5,
378 
379         /* sometimes resuming a link requires several retries */
380         ATA_LINK_RESUME_TRIES   = 5,
381 
382         /* how hard are we gonna try to probe/recover devices */
383         ATA_PROBE_MAX_TRIES     = 3,
384         ATA_EH_DEV_TRIES        = 3,
385         ATA_EH_PMP_TRIES        = 5,
386         ATA_EH_PMP_LINK_TRIES   = 3,
387 
388         SATA_PMP_RW_TIMEOUT     = 3000,         /* PMP read/write timeout */
389 
390         /* This should match the actual table size of
391          * ata_eh_cmd_timeout_table in libata-eh.c.
392          */
393         ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
394 
395         /* Horkage types. May be set by libata or controller on drives
396            (some horkage may be drive/controller pair dependent */
397 
398         ATA_HORKAGE_DIAGNOSTIC  = (1 << 0),     /* Failed boot diag */
399         ATA_HORKAGE_NODMA       = (1 << 1),     /* DMA problems */
400         ATA_HORKAGE_NONCQ       = (1 << 2),     /* Don't use NCQ */
401         ATA_HORKAGE_MAX_SEC_128 = (1 << 3),     /* Limit max sects to 128 */
402         ATA_HORKAGE_BROKEN_HPA  = (1 << 4),     /* Broken HPA */
403         ATA_HORKAGE_DISABLE     = (1 << 5),     /* Disable it */
404         ATA_HORKAGE_HPA_SIZE    = (1 << 6),     /* native size off by one */
405         ATA_HORKAGE_IVB         = (1 << 8),     /* cbl det validity bit bugs */
406         ATA_HORKAGE_STUCK_ERR   = (1 << 9),     /* stuck ERR on next PACKET */
407         ATA_HORKAGE_BRIDGE_OK   = (1 << 10),    /* no bridge limits */
408         ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
409                                                     not multiple of 16 bytes */
410         ATA_HORKAGE_FIRMWARE_WARN = (1 << 12),  /* firmware update warning */
411         ATA_HORKAGE_1_5_GBPS    = (1 << 13),    /* force 1.5 Gbps */
412         ATA_HORKAGE_NOSETXFER   = (1 << 14),    /* skip SETXFER, SATA only */
413         ATA_HORKAGE_BROKEN_FPDMA_AA     = (1 << 15),    /* skip AA */
414         ATA_HORKAGE_DUMP_ID     = (1 << 16),    /* dump IDENTIFY data */
415         ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17),  /* Set max sects to 65535 */
416         ATA_HORKAGE_ATAPI_DMADIR = (1 << 18),   /* device requires dmadir */
417         ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19),    /* don't use queued TRIM */
418         ATA_HORKAGE_NOLPM       = (1 << 20),    /* don't use LPM */
419         ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21),  /* some WDs have broken LPM */
420         ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
421         ATA_HORKAGE_NO_DMA_LOG  = (1 << 23),    /* don't use DMA for log read */
422         ATA_HORKAGE_NOTRIM      = (1 << 24),    /* don't use TRIM */
423         ATA_HORKAGE_MAX_SEC_1024 = (1 << 25),   /* Limit max sects to 1024 */
424 
425          /* DMA mask for user DMA control: User visible values; DO NOT
426             renumber */
427         ATA_DMA_MASK_ATA        = (1 << 0),     /* DMA on ATA Disk */
428         ATA_DMA_MASK_ATAPI      = (1 << 1),     /* DMA on ATAPI */
429         ATA_DMA_MASK_CFA        = (1 << 2),     /* DMA on CF Card */
430 
431         /* ATAPI command types */
432         ATAPI_READ              = 0,            /* READs */
433         ATAPI_WRITE             = 1,            /* WRITEs */
434         ATAPI_READ_CD           = 2,            /* READ CD [MSF] */
435         ATAPI_PASS_THRU         = 3,            /* SAT pass-thru */
436         ATAPI_MISC              = 4,            /* the rest */
437 
438         /* Timing constants */
439         ATA_TIMING_SETUP        = (1 << 0),
440         ATA_TIMING_ACT8B        = (1 << 1),
441         ATA_TIMING_REC8B        = (1 << 2),
442         ATA_TIMING_CYC8B        = (1 << 3),
443         ATA_TIMING_8BIT         = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
444                                   ATA_TIMING_CYC8B,
445         ATA_TIMING_ACTIVE       = (1 << 4),
446         ATA_TIMING_RECOVER      = (1 << 5),
447         ATA_TIMING_DMACK_HOLD   = (1 << 6),
448         ATA_TIMING_CYCLE        = (1 << 7),
449         ATA_TIMING_UDMA         = (1 << 8),
450         ATA_TIMING_ALL          = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
451                                   ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
452                                   ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
453                                   ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
454                                   ATA_TIMING_UDMA,
455 
456         /* ACPI constants */
457         ATA_ACPI_FILTER_SETXFER = 1 << 0,
458         ATA_ACPI_FILTER_LOCK    = 1 << 1,
459         ATA_ACPI_FILTER_DIPM    = 1 << 2,
460         ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3,  /* FPDMA non-zero offset */
461         ATA_ACPI_FILTER_FPDMA_AA = 1 << 4,      /* FPDMA auto activate */
462 
463         ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
464                                   ATA_ACPI_FILTER_LOCK |
465                                   ATA_ACPI_FILTER_DIPM,
466 };
467 
468 enum ata_xfer_mask {
469         ATA_MASK_PIO            = ((1LU << ATA_NR_PIO_MODES) - 1)
470                                         << ATA_SHIFT_PIO,
471         ATA_MASK_MWDMA          = ((1LU << ATA_NR_MWDMA_MODES) - 1)
472                                         << ATA_SHIFT_MWDMA,
473         ATA_MASK_UDMA           = ((1LU << ATA_NR_UDMA_MODES) - 1)
474                                         << ATA_SHIFT_UDMA,
475 };
476 
477 enum hsm_task_states {
478         HSM_ST_IDLE,            /* no command on going */
479         HSM_ST_FIRST,           /* (waiting the device to)
480                                    write CDB or first data block */
481         HSM_ST,                 /* (waiting the device to) transfer data */
482         HSM_ST_LAST,            /* (waiting the device to) complete command */
483         HSM_ST_ERR,             /* error */
484 };
485 
486 enum ata_completion_errors {
487         AC_ERR_DEV              = (1 << 0), /* device reported error */
488         AC_ERR_HSM              = (1 << 1), /* host state machine violation */
489         AC_ERR_TIMEOUT          = (1 << 2), /* timeout */
490         AC_ERR_MEDIA            = (1 << 3), /* media error */
491         AC_ERR_ATA_BUS          = (1 << 4), /* ATA bus error */
492         AC_ERR_HOST_BUS         = (1 << 5), /* host bus error */
493         AC_ERR_SYSTEM           = (1 << 6), /* system error */
494         AC_ERR_INVALID          = (1 << 7), /* invalid argument */
495         AC_ERR_OTHER            = (1 << 8), /* unknown */
496         AC_ERR_NODEV_HINT       = (1 << 9), /* polling device detection hint */
497         AC_ERR_NCQ              = (1 << 10), /* marker for offending NCQ qc */
498 };
499 
500 /*
501  * Link power management policy: If you alter this, you also need to
502  * alter libata-scsi.c (for the ascii descriptions)
503  */
504 enum ata_lpm_policy {
505         ATA_LPM_UNKNOWN,
506         ATA_LPM_MAX_POWER,
507         ATA_LPM_MED_POWER,
508         ATA_LPM_MED_POWER_WITH_DIPM, /* Med power + DIPM as win IRST does */
509         ATA_LPM_MIN_POWER_WITH_PARTIAL, /* Min Power + partial and slumber */
510         ATA_LPM_MIN_POWER, /* Min power + no partial (slumber only) */
511 };
512 
513 enum ata_lpm_hints {
514         ATA_LPM_EMPTY           = (1 << 0), /* port empty/probing */
515         ATA_LPM_HIPM            = (1 << 1), /* may use HIPM */
516         ATA_LPM_WAKE_ONLY       = (1 << 2), /* only wake up link */
517 };
518 
519 /* forward declarations */
520 struct scsi_device;
521 struct ata_port_operations;
522 struct ata_port;
523 struct ata_link;
524 struct ata_queued_cmd;
525 
526 /* typedefs */
527 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
528 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
529 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
530                               unsigned long deadline);
531 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
532 
533 extern struct device_attribute dev_attr_link_power_management_policy;
534 extern struct device_attribute dev_attr_unload_heads;
535 extern struct device_attribute dev_attr_ncq_prio_enable;
536 extern struct device_attribute dev_attr_em_message_type;
537 extern struct device_attribute dev_attr_em_message;
538 extern struct device_attribute dev_attr_sw_activity;
539 
540 enum sw_activity {
541         OFF,
542         BLINK_ON,
543         BLINK_OFF,
544 };
545 
546 struct ata_taskfile {
547         unsigned long           flags;          /* ATA_TFLAG_xxx */
548         u8                      protocol;       /* ATA_PROT_xxx */
549 
550         u8                      ctl;            /* control reg */
551 
552         u8                      hob_feature;    /* additional data */
553         u8                      hob_nsect;      /* to support LBA48 */
554         u8                      hob_lbal;
555         u8                      hob_lbam;
556         u8                      hob_lbah;
557 
558         u8                      feature;
559         u8                      nsect;
560         u8                      lbal;
561         u8                      lbam;
562         u8                      lbah;
563 
564         u8                      device;
565 
566         u8                      command;        /* IO operation */
567 
568         u32                     auxiliary;      /* auxiliary field */
569                                                 /* from SATA 3.1 and */
570                                                 /* ATA-8 ACS-3 */
571 };
572 
573 #ifdef CONFIG_ATA_SFF
574 struct ata_ioports {
575         void __iomem            *cmd_addr;
576         void __iomem            *data_addr;
577         void __iomem            *error_addr;
578         void __iomem            *feature_addr;
579         void __iomem            *nsect_addr;
580         void __iomem            *lbal_addr;
581         void __iomem            *lbam_addr;
582         void __iomem            *lbah_addr;
583         void __iomem            *device_addr;
584         void __iomem            *status_addr;
585         void __iomem            *command_addr;
586         void __iomem            *altstatus_addr;
587         void __iomem            *ctl_addr;
588 #ifdef CONFIG_ATA_BMDMA
589         void __iomem            *bmdma_addr;
590 #endif /* CONFIG_ATA_BMDMA */
591         void __iomem            *scr_addr;
592 };
593 #endif /* CONFIG_ATA_SFF */
594 
595 struct ata_host {
596         spinlock_t              lock;
597         struct device           *dev;
598         void __iomem * const    *iomap;
599         unsigned int            n_ports;
600         unsigned int            n_tags;                 /* nr of NCQ tags */
601         void                    *private_data;
602         struct ata_port_operations *ops;
603         unsigned long           flags;
604         struct kref             kref;
605 
606         struct mutex            eh_mutex;
607         struct task_struct      *eh_owner;
608 
609         struct ata_port         *simplex_claimed;       /* channel owning the DMA */
610         struct ata_port         *ports[0];
611 };
612 
613 struct ata_queued_cmd {
614         struct ata_port         *ap;
615         struct ata_device       *dev;
616 
617         struct scsi_cmnd        *scsicmd;
618         void                    (*scsidone)(struct scsi_cmnd *);
619 
620         struct ata_taskfile     tf;
621         u8                      cdb[ATAPI_CDB_LEN];
622 
623         unsigned long           flags;          /* ATA_QCFLAG_xxx */
624         unsigned int            tag;            /* libata core tag */
625         unsigned int            hw_tag;         /* driver tag */
626         unsigned int            n_elem;
627         unsigned int            orig_n_elem;
628 
629         int                     dma_dir;
630 
631         unsigned int            sect_size;
632 
633         unsigned int            nbytes;
634         unsigned int            extrabytes;
635         unsigned int            curbytes;
636 
637         struct scatterlist      sgent;
638 
639         struct scatterlist      *sg;
640 
641         struct scatterlist      *cursg;
642         unsigned int            cursg_ofs;
643 
644         unsigned int            err_mask;
645         struct ata_taskfile     result_tf;
646         ata_qc_cb_t             complete_fn;
647 
648         void                    *private_data;
649         void                    *lldd_task;
650 };
651 
652 struct ata_port_stats {
653         unsigned long           unhandled_irq;
654         unsigned long           idle_irq;
655         unsigned long           rw_reqbuf;
656 };
657 
658 struct ata_ering_entry {
659         unsigned int            eflags;
660         unsigned int            err_mask;
661         u64                     timestamp;
662 };
663 
664 struct ata_ering {
665         int                     cursor;
666         struct ata_ering_entry  ring[ATA_ERING_SIZE];
667 };
668 
669 struct ata_device {
670         struct ata_link         *link;
671         unsigned int            devno;          /* 0 or 1 */
672         unsigned int            horkage;        /* List of broken features */
673         unsigned long           flags;          /* ATA_DFLAG_xxx */
674         struct scsi_device      *sdev;          /* attached SCSI device */
675         void                    *private_data;
676 #ifdef CONFIG_ATA_ACPI
677         union acpi_object       *gtf_cache;
678         unsigned int            gtf_filter;
679 #endif
680 #ifdef CONFIG_SATA_ZPODD
681         void                    *zpodd;
682 #endif
683         struct device           tdev;
684         /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
685         u64                     n_sectors;      /* size of device, if ATA */
686         u64                     n_native_sectors; /* native size, if ATA */
687         unsigned int            class;          /* ATA_DEV_xxx */
688         unsigned long           unpark_deadline;
689 
690         u8                      pio_mode;
691         u8                      dma_mode;
692         u8                      xfer_mode;
693         unsigned int            xfer_shift;     /* ATA_SHIFT_xxx */
694 
695         unsigned int            multi_count;    /* sectors count for
696                                                    READ/WRITE MULTIPLE */
697         unsigned int            max_sectors;    /* per-device max sectors */
698         unsigned int            cdb_len;
699 
700         /* per-dev xfer mask */
701         unsigned long           pio_mask;
702         unsigned long           mwdma_mask;
703         unsigned long           udma_mask;
704 
705         /* for CHS addressing */
706         u16                     cylinders;      /* Number of cylinders */
707         u16                     heads;          /* Number of heads */
708         u16                     sectors;        /* Number of sectors per track */
709 
710         union {
711                 u16             id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
712                 u32             gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
713         } ____cacheline_aligned;
714 
715         /* DEVSLP Timing Variables from Identify Device Data Log */
716         u8                      devslp_timing[ATA_LOG_DEVSLP_SIZE];
717 
718         /* NCQ send and receive log subcommand support */
719         u8                      ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE];
720         u8                      ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_SIZE];
721 
722         /* ZAC zone configuration */
723         u32                     zac_zoned_cap;
724         u32                     zac_zones_optimal_open;
725         u32                     zac_zones_optimal_nonseq;
726         u32                     zac_zones_max_open;
727 
728         /* error history */
729         int                     spdn_cnt;
730         /* ering is CLEAR_END, read comment above CLEAR_END */
731         struct ata_ering        ering;
732 };
733 
734 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
735  * cleared to zero on ata_dev_init().
736  */
737 #define ATA_DEVICE_CLEAR_BEGIN          offsetof(struct ata_device, n_sectors)
738 #define ATA_DEVICE_CLEAR_END            offsetof(struct ata_device, ering)
739 
740 struct ata_eh_info {
741         struct ata_device       *dev;           /* offending device */
742         u32                     serror;         /* SError from LLDD */
743         unsigned int            err_mask;       /* port-wide err_mask */
744         unsigned int            action;         /* ATA_EH_* action mask */
745         unsigned int            dev_action[ATA_MAX_DEVICES]; /* dev EH action */
746         unsigned int            flags;          /* ATA_EHI_* flags */
747 
748         unsigned int            probe_mask;
749 
750         char                    desc[ATA_EH_DESC_LEN];
751         int                     desc_len;
752 };
753 
754 struct ata_eh_context {
755         struct ata_eh_info      i;
756         int                     tries[ATA_MAX_DEVICES];
757         int                     cmd_timeout_idx[ATA_MAX_DEVICES]
758                                                [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
759         unsigned int            classes[ATA_MAX_DEVICES];
760         unsigned int            did_probe_mask;
761         unsigned int            unloaded_mask;
762         unsigned int            saved_ncq_enabled;
763         u8                      saved_xfer_mode[ATA_MAX_DEVICES];
764         /* timestamp for the last reset attempt or success */
765         unsigned long           last_reset;
766 };
767 
768 struct ata_acpi_drive
769 {
770         u32 pio;
771         u32 dma;
772 } __packed;
773 
774 struct ata_acpi_gtm {
775         struct ata_acpi_drive drive[2];
776         u32 flags;
777 } __packed;
778 
779 struct ata_link {
780         struct ata_port         *ap;
781         int                     pmp;            /* port multiplier port # */
782 
783         struct device           tdev;
784         unsigned int            active_tag;     /* active tag on this link */
785         u32                     sactive;        /* active NCQ commands */
786 
787         unsigned int            flags;          /* ATA_LFLAG_xxx */
788 
789         u32                     saved_scontrol; /* SControl on probe */
790         unsigned int            hw_sata_spd_limit;
791         unsigned int            sata_spd_limit;
792         unsigned int            sata_spd;       /* current SATA PHY speed */
793         enum ata_lpm_policy     lpm_policy;
794 
795         /* record runtime error info, protected by host_set lock */
796         struct ata_eh_info      eh_info;
797         /* EH context */
798         struct ata_eh_context   eh_context;
799 
800         struct ata_device       device[ATA_MAX_DEVICES];
801 
802         unsigned long           last_lpm_change; /* when last LPM change happened */
803 };
804 #define ATA_LINK_CLEAR_BEGIN            offsetof(struct ata_link, active_tag)
805 #define ATA_LINK_CLEAR_END              offsetof(struct ata_link, device[0])
806 
807 struct ata_port {
808         struct Scsi_Host        *scsi_host; /* our co-allocated scsi host */
809         struct ata_port_operations *ops;
810         spinlock_t              *lock;
811         /* Flags owned by the EH context. Only EH should touch these once the
812            port is active */
813         unsigned long           flags;  /* ATA_FLAG_xxx */
814         /* Flags that change dynamically, protected by ap->lock */
815         unsigned int            pflags; /* ATA_PFLAG_xxx */
816         unsigned int            print_id; /* user visible unique port ID */
817         unsigned int            local_port_no; /* host local port num */
818         unsigned int            port_no; /* 0 based port no. inside the host */
819 
820 #ifdef CONFIG_ATA_SFF
821         struct ata_ioports      ioaddr; /* ATA cmd/ctl/dma register blocks */
822         u8                      ctl;    /* cache of ATA control register */
823         u8                      last_ctl;       /* Cache last written value */
824         struct ata_link*        sff_pio_task_link; /* link currently used */
825         struct delayed_work     sff_pio_task;
826 #ifdef CONFIG_ATA_BMDMA
827         struct ata_bmdma_prd    *bmdma_prd;     /* BMDMA SG list */
828         dma_addr_t              bmdma_prd_dma;  /* and its DMA mapping */
829 #endif /* CONFIG_ATA_BMDMA */
830 #endif /* CONFIG_ATA_SFF */
831 
832         unsigned int            pio_mask;
833         unsigned int            mwdma_mask;
834         unsigned int            udma_mask;
835         unsigned int            cbl;    /* cable type; ATA_CBL_xxx */
836 
837         struct ata_queued_cmd   qcmd[ATA_MAX_QUEUE + 1];
838         unsigned long           sas_tag_allocated; /* for sas tag allocation only */
839         u64                     qc_active;
840         int                     nr_active_links; /* #links with active qcs */
841         unsigned int            sas_last_tag;   /* track next tag hw expects */
842 
843         struct ata_link         link;           /* host default link */
844         struct ata_link         *slave_link;    /* see ata_slave_link_init() */
845 
846         int                     nr_pmp_links;   /* nr of available PMP links */
847         struct ata_link         *pmp_link;      /* array of PMP links */
848         struct ata_link         *excl_link;     /* for PMP qc exclusion */
849 
850         struct ata_port_stats   stats;
851         struct ata_host         *host;
852         struct device           *dev;
853         struct device           tdev;
854 
855         struct mutex            scsi_scan_mutex;
856         struct delayed_work     hotplug_task;
857         struct work_struct      scsi_rescan_task;
858 
859         unsigned int            hsm_task_state;
860 
861         u32                     msg_enable;
862         struct list_head        eh_done_q;
863         wait_queue_head_t       eh_wait_q;
864         int                     eh_tries;
865         struct completion       park_req_pending;
866 
867         pm_message_t            pm_mesg;
868         enum ata_lpm_policy     target_lpm_policy;
869 
870         struct timer_list       fastdrain_timer;
871         unsigned long           fastdrain_cnt;
872 
873         int                     em_message_type;
874         void                    *private_data;
875 
876 #ifdef CONFIG_ATA_ACPI
877         struct ata_acpi_gtm     __acpi_init_gtm; /* use ata_acpi_init_gtm() */
878 #endif
879         /* owned by EH */
880         u8                      sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
881 };
882 
883 /* The following initializer overrides a method to NULL whether one of
884  * its parent has the method defined or not.  This is equivalent to
885  * ERR_PTR(-ENOENT).  Unfortunately, ERR_PTR doesn't render a constant
886  * expression and thus can't be used as an initializer.
887  */
888 #define ATA_OP_NULL             (void *)(unsigned long)(-ENOENT)
889 
890 struct ata_port_operations {
891         /*
892          * Command execution
893          */
894         int  (*qc_defer)(struct ata_queued_cmd *qc);
895         int  (*check_atapi_dma)(struct ata_queued_cmd *qc);
896         void (*qc_prep)(struct ata_queued_cmd *qc);
897         unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
898         bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
899 
900         /*
901          * Configuration and exception handling
902          */
903         int  (*cable_detect)(struct ata_port *ap);
904         unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
905         void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
906         void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
907         int  (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
908         unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
909 
910         void (*dev_config)(struct ata_device *dev);
911 
912         void (*freeze)(struct ata_port *ap);
913         void (*thaw)(struct ata_port *ap);
914         ata_prereset_fn_t       prereset;
915         ata_reset_fn_t          softreset;
916         ata_reset_fn_t          hardreset;
917         ata_postreset_fn_t      postreset;
918         ata_prereset_fn_t       pmp_prereset;
919         ata_reset_fn_t          pmp_softreset;
920         ata_reset_fn_t          pmp_hardreset;
921         ata_postreset_fn_t      pmp_postreset;
922         void (*error_handler)(struct ata_port *ap);
923         void (*lost_interrupt)(struct ata_port *ap);
924         void (*post_internal_cmd)(struct ata_queued_cmd *qc);
925         void (*sched_eh)(struct ata_port *ap);
926         void (*end_eh)(struct ata_port *ap);
927 
928         /*
929          * Optional features
930          */
931         int  (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
932         int  (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
933         void (*pmp_attach)(struct ata_port *ap);
934         void (*pmp_detach)(struct ata_port *ap);
935         int  (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
936                         unsigned hints);
937 
938         /*
939          * Start, stop, suspend and resume
940          */
941         int  (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
942         int  (*port_resume)(struct ata_port *ap);
943         int  (*port_start)(struct ata_port *ap);
944         void (*port_stop)(struct ata_port *ap);
945         void (*host_stop)(struct ata_host *host);
946 
947 #ifdef CONFIG_ATA_SFF
948         /*
949          * SFF / taskfile oriented ops
950          */
951         void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
952         void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
953         u8   (*sff_check_status)(struct ata_port *ap);
954         u8   (*sff_check_altstatus)(struct ata_port *ap);
955         void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
956         void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
957         void (*sff_exec_command)(struct ata_port *ap,
958                                  const struct ata_taskfile *tf);
959         unsigned int (*sff_data_xfer)(struct ata_queued_cmd *qc,
960                         unsigned char *buf, unsigned int buflen, int rw);
961         void (*sff_irq_on)(struct ata_port *);
962         bool (*sff_irq_check)(struct ata_port *);
963         void (*sff_irq_clear)(struct ata_port *);
964         void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
965 
966 #ifdef CONFIG_ATA_BMDMA
967         void (*bmdma_setup)(struct ata_queued_cmd *qc);
968         void (*bmdma_start)(struct ata_queued_cmd *qc);
969         void (*bmdma_stop)(struct ata_queued_cmd *qc);
970         u8   (*bmdma_status)(struct ata_port *ap);
971 #endif /* CONFIG_ATA_BMDMA */
972 #endif /* CONFIG_ATA_SFF */
973 
974         ssize_t (*em_show)(struct ata_port *ap, char *buf);
975         ssize_t (*em_store)(struct ata_port *ap, const char *message,
976                             size_t size);
977         ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
978         ssize_t (*sw_activity_store)(struct ata_device *dev,
979                                      enum sw_activity val);
980         ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state,
981                                         ssize_t size);
982 
983         /*
984          * Obsolete
985          */
986         void (*phy_reset)(struct ata_port *ap);
987         void (*eng_timeout)(struct ata_port *ap);
988 
989         /*
990          * ->inherits must be the last field and all the preceding
991          * fields must be pointers.
992          */
993         const struct ata_port_operations        *inherits;
994 };
995 
996 struct ata_port_info {
997         unsigned long           flags;
998         unsigned long           link_flags;
999         unsigned long           pio_mask;
1000         unsigned long           mwdma_mask;
1001         unsigned long           udma_mask;
1002         struct ata_port_operations *port_ops;
1003         void                    *private_data;
1004 };
1005 
1006 struct ata_timing {
1007         unsigned short mode;            /* ATA mode */
1008         unsigned short setup;           /* t1 */
1009         unsigned short act8b;           /* t2 for 8-bit I/O */
1010         unsigned short rec8b;           /* t2i for 8-bit I/O */
1011         unsigned short cyc8b;           /* t0 for 8-bit I/O */
1012         unsigned short active;          /* t2 or tD */
1013         unsigned short recover;         /* t2i or tK */
1014         unsigned short dmack_hold;      /* tj */
1015         unsigned short cycle;           /* t0 */
1016         unsigned short udma;            /* t2CYCTYP/2 */
1017 };
1018 
1019 /*
1020  * Core layer - drivers/ata/libata-core.c
1021  */
1022 extern const unsigned long sata_deb_timing_normal[];
1023 extern const unsigned long sata_deb_timing_hotplug[];
1024 extern const unsigned long sata_deb_timing_long[];
1025 
1026 extern struct ata_port_operations ata_dummy_port_ops;
1027 extern const struct ata_port_info ata_dummy_port_info;
1028 
1029 static inline bool ata_is_atapi(u8 prot)
1030 {
1031         return prot & ATA_PROT_FLAG_ATAPI;
1032 }
1033 
1034 static inline bool ata_is_pio(u8 prot)
1035 {
1036         return prot & ATA_PROT_FLAG_PIO;
1037 }
1038 
1039 static inline bool ata_is_dma(u8 prot)
1040 {
1041         return prot & ATA_PROT_FLAG_DMA;
1042 }
1043 
1044 static inline bool ata_is_ncq(u8 prot)
1045 {
1046         return prot & ATA_PROT_FLAG_NCQ;
1047 }
1048 
1049 static inline bool ata_is_data(u8 prot)
1050 {
1051         return prot & (ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA);
1052 }
1053 
1054 static inline int is_multi_taskfile(struct ata_taskfile *tf)
1055 {
1056         return (tf->command == ATA_CMD_READ_MULTI) ||
1057                (tf->command == ATA_CMD_WRITE_MULTI) ||
1058                (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1059                (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1060                (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1061 }
1062 
1063 static inline const unsigned long *
1064 sata_ehc_deb_timing(struct ata_eh_context *ehc)
1065 {
1066         if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
1067                 return sata_deb_timing_hotplug;
1068         else
1069                 return sata_deb_timing_normal;
1070 }
1071 
1072 static inline int ata_port_is_dummy(struct ata_port *ap)
1073 {
1074         return ap->ops == &ata_dummy_port_ops;
1075 }
1076 
1077 extern int sata_set_spd(struct ata_link *link);
1078 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
1079 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
1080                                 int (*check_ready)(struct ata_link *link));
1081 extern int sata_link_debounce(struct ata_link *link,
1082                         const unsigned long *params, unsigned long deadline);
1083 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
1084                             unsigned long deadline);
1085 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
1086                              bool spm_wakeup);
1087 extern int sata_link_hardreset(struct ata_link *link,
1088                         const unsigned long *timing, unsigned long deadline,
1089                         bool *online, int (*check_ready)(struct ata_link *));
1090 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
1091                               unsigned long deadline);
1092 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1093 
1094 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
1095 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
1096                         const struct ata_port_info * const * ppi, int n_ports);
1097 extern int ata_slave_link_init(struct ata_port *ap);
1098 extern void ata_host_get(struct ata_host *host);
1099 extern void ata_host_put(struct ata_host *host);
1100 extern int ata_host_start(struct ata_host *host);
1101 extern int ata_host_register(struct ata_host *host,
1102                              struct scsi_host_template *sht);
1103 extern int ata_host_activate(struct ata_host *host, int irq,
1104                              irq_handler_t irq_handler, unsigned long irq_flags,
1105                              struct scsi_host_template *sht);
1106 extern void ata_host_detach(struct ata_host *host);
1107 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
1108 extern int ata_scsi_detect(struct scsi_host_template *sht);
1109 extern int ata_scsi_ioctl(struct scsi_device *dev, unsigned int cmd,
1110                           void __user *arg);
1111 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1112 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1113                             unsigned int cmd, void __user *arg);
1114 extern void ata_sas_port_destroy(struct ata_port *);
1115 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1116                                            struct ata_port_info *, struct Scsi_Host *);
1117 extern void ata_sas_async_probe(struct ata_port *ap);
1118 extern int ata_sas_sync_probe(struct ata_port *ap);
1119 extern int ata_sas_port_init(struct ata_port *);
1120 extern int ata_sas_port_start(struct ata_port *ap);
1121 extern int ata_sas_tport_add(struct device *parent, struct ata_port *ap);
1122 extern void ata_sas_tport_delete(struct ata_port *ap);
1123 extern void ata_sas_port_stop(struct ata_port *ap);
1124 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1125 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1126 extern int sata_scr_valid(struct ata_link *link);
1127 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1128 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1129 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1130 extern bool ata_link_online(struct ata_link *link);
1131 extern bool ata_link_offline(struct ata_link *link);
1132 #ifdef CONFIG_PM
1133 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1134 extern void ata_host_resume(struct ata_host *host);
1135 extern void ata_sas_port_suspend(struct ata_port *ap);
1136 extern void ata_sas_port_resume(struct ata_port *ap);
1137 #else
1138 static inline void ata_sas_port_suspend(struct ata_port *ap)
1139 {
1140 }
1141 static inline void ata_sas_port_resume(struct ata_port *ap)
1142 {
1143 }
1144 #endif
1145 extern int ata_ratelimit(void);
1146 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1147 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1148                         u32 val, unsigned long interval, unsigned long timeout);
1149 extern int atapi_cmd_type(u8 opcode);
1150 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1151                           u8 pmp, int is_cmd, u8 *fis);
1152 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1153 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1154                         unsigned long mwdma_mask, unsigned long udma_mask);
1155 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1156                         unsigned long *pio_mask, unsigned long *mwdma_mask,
1157                         unsigned long *udma_mask);
1158 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1159 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1160 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1161 extern const char *ata_mode_string(unsigned long xfer_mask);
1162 extern unsigned long ata_id_xfermask(const u16 *id);
1163 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1164 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1165 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1166                  unsigned int n_elem);
1167 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1168 extern void ata_dev_disable(struct ata_device *adev);
1169 extern void ata_id_string(const u16 *id, unsigned char *s,
1170                           unsigned int ofs, unsigned int len);
1171 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1172                             unsigned int ofs, unsigned int len);
1173 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1174                                         struct ata_taskfile *tf, u16 *id);
1175 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1176 extern int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active);
1177 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1178 extern int ata_std_bios_param(struct scsi_device *sdev,
1179                               struct block_device *bdev,
1180                               sector_t capacity, int geom[]);
1181 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1182 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1183 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1184 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1185                                        int queue_depth);
1186 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1187                                     int queue_depth);
1188 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1189 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1190 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1191 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1192 extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
1193 
1194 extern int ata_cable_40wire(struct ata_port *ap);
1195 extern int ata_cable_80wire(struct ata_port *ap);
1196 extern int ata_cable_sata(struct ata_port *ap);
1197 extern int ata_cable_ignore(struct ata_port *ap);
1198 extern int ata_cable_unknown(struct ata_port *ap);
1199 
1200 /* Timing helpers */
1201 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1202 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1203 extern int ata_timing_compute(struct ata_device *, unsigned short,
1204                               struct ata_timing *, int, int);
1205 extern void ata_timing_merge(const struct ata_timing *,
1206                              const struct ata_timing *, struct ata_timing *,
1207                              unsigned int);
1208 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1209 
1210 /* PCI */
1211 #ifdef CONFIG_PCI
1212 struct pci_dev;
1213 
1214 struct pci_bits {
1215         unsigned int            reg;    /* PCI config register to read */
1216         unsigned int            width;  /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1217         unsigned long           mask;
1218         unsigned long           val;
1219 };
1220 
1221 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1222 extern void ata_pci_remove_one(struct pci_dev *pdev);
1223 
1224 #ifdef CONFIG_PM
1225 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1226 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1227 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1228 extern int ata_pci_device_resume(struct pci_dev *pdev);
1229 #endif /* CONFIG_PM */
1230 #endif /* CONFIG_PCI */
1231 
1232 struct platform_device;
1233 
1234 extern int ata_platform_remove_one(struct platform_device *pdev);
1235 
1236 /*
1237  * ACPI - drivers/ata/libata-acpi.c
1238  */
1239 #ifdef CONFIG_ATA_ACPI
1240 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1241 {
1242         if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1243                 return &ap->__acpi_init_gtm;
1244         return NULL;
1245 }
1246 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1247 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1248 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1249                                     const struct ata_acpi_gtm *gtm);
1250 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1251 #else
1252 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1253 {
1254         return NULL;
1255 }
1256 
1257 static inline int ata_acpi_stm(const struct ata_port *ap,
1258                                struct ata_acpi_gtm *stm)
1259 {
1260         return -ENOSYS;
1261 }
1262 
1263 static inline int ata_acpi_gtm(const struct ata_port *ap,
1264                                struct ata_acpi_gtm *stm)
1265 {
1266         return -ENOSYS;
1267 }
1268 
1269 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1270                                         const struct ata_acpi_gtm *gtm)
1271 {
1272         return 0;
1273 }
1274 
1275 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1276                                       const struct ata_acpi_gtm *gtm)
1277 {
1278         return 0;
1279 }
1280 #endif
1281 
1282 /*
1283  * EH - drivers/ata/libata-eh.c
1284  */
1285 extern void ata_port_schedule_eh(struct ata_port *ap);
1286 extern void ata_port_wait_eh(struct ata_port *ap);
1287 extern int ata_link_abort(struct ata_link *link);
1288 extern int ata_port_abort(struct ata_port *ap);
1289 extern int ata_port_freeze(struct ata_port *ap);
1290 extern int sata_async_notification(struct ata_port *ap);
1291 
1292 extern void ata_eh_freeze_port(struct ata_port *ap);
1293 extern void ata_eh_thaw_port(struct ata_port *ap);
1294 
1295 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1296 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1297 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1298 
1299 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1300                       ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1301                       ata_postreset_fn_t postreset);
1302 extern void ata_std_error_handler(struct ata_port *ap);
1303 extern void ata_std_sched_eh(struct ata_port *ap);
1304 extern void ata_std_end_eh(struct ata_port *ap);
1305 extern int ata_link_nr_enabled(struct ata_link *link);
1306 
1307 /*
1308  * Base operations to inherit from and initializers for sht
1309  *
1310  * Operations
1311  *
1312  * base  : Common to all libata drivers.
1313  * sata  : SATA controllers w/ native interface.
1314  * pmp   : SATA controllers w/ PMP support.
1315  * sff   : SFF ATA controllers w/o BMDMA support.
1316  * bmdma : SFF ATA controllers w/ BMDMA support.
1317  *
1318  * sht initializers
1319  *
1320  * BASE  : Common to all libata drivers.  The user must set
1321  *         sg_tablesize and dma_boundary.
1322  * PIO   : SFF ATA controllers w/ only PIO support.
1323  * BMDMA : SFF ATA controllers w/ BMDMA support.  sg_tablesize and
1324  *         dma_boundary are set to BMDMA limits.
1325  * NCQ   : SATA controllers supporting NCQ.  The user must set
1326  *         sg_tablesize, dma_boundary and can_queue.
1327  */
1328 extern const struct ata_port_operations ata_base_port_ops;
1329 extern const struct ata_port_operations sata_port_ops;
1330 extern struct device_attribute *ata_common_sdev_attrs[];
1331 
1332 /*
1333  * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
1334  * by the edge drivers.  Because the 'module' field of sht must be the
1335  * edge driver's module reference, otherwise the driver can be unloaded
1336  * even if the scsi_device is being accessed.
1337  */
1338 #define ATA_BASE_SHT(drv_name)                                  \
1339         .module                 = THIS_MODULE,                  \
1340         .name                   = drv_name,                     \
1341         .ioctl                  = ata_scsi_ioctl,               \
1342         .queuecommand           = ata_scsi_queuecmd,            \
1343         .can_queue              = ATA_DEF_QUEUE,                \
1344         .tag_alloc_policy       = BLK_TAG_ALLOC_RR,             \
1345         .this_id                = ATA_SHT_THIS_ID,              \
1346         .emulated               = ATA_SHT_EMULATED,             \
1347         .proc_name              = drv_name,                     \
1348         .slave_configure        = ata_scsi_slave_config,        \
1349         .slave_destroy          = ata_scsi_slave_destroy,       \
1350         .bios_param             = ata_std_bios_param,           \
1351         .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1352         .sdev_attrs             = ata_common_sdev_attrs
1353 
1354 #define ATA_NCQ_SHT(drv_name)                                   \
1355         ATA_BASE_SHT(drv_name),                                 \
1356         .change_queue_depth     = ata_scsi_change_queue_depth
1357 
1358 /*
1359  * PMP helpers
1360  */
1361 #ifdef CONFIG_SATA_PMP
1362 static inline bool sata_pmp_supported(struct ata_port *ap)
1363 {
1364         return ap->flags & ATA_FLAG_PMP;
1365 }
1366 
1367 static inline bool sata_pmp_attached(struct ata_port *ap)
1368 {
1369         return ap->nr_pmp_links != 0;
1370 }
1371 
1372 static inline bool ata_is_host_link(const struct ata_link *link)
1373 {
1374         return link == &link->ap->link || link == link->ap->slave_link;
1375 }
1376 #else /* CONFIG_SATA_PMP */
1377 static inline bool sata_pmp_supported(struct ata_port *ap)
1378 {
1379         return false;
1380 }
1381 
1382 static inline bool sata_pmp_attached(struct ata_port *ap)
1383 {
1384         return false;
1385 }
1386 
1387 static inline bool ata_is_host_link(const struct ata_link *link)
1388 {
1389         return 1;
1390 }
1391 #endif /* CONFIG_SATA_PMP */
1392 
1393 static inline int sata_srst_pmp(struct ata_link *link)
1394 {
1395         if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1396                 return SATA_PMP_CTRL_PORT;
1397         return link->pmp;
1398 }
1399 
1400 /*
1401  * printk helpers
1402  */
1403 __printf(3, 4)
1404 void ata_port_printk(const struct ata_port *ap, const char *level,
1405                      const char *fmt, ...);
1406 __printf(3, 4)
1407 void ata_link_printk(const struct ata_link *link, const char *level,
1408                      const char *fmt, ...);
1409 __printf(3, 4)
1410 void ata_dev_printk(const struct ata_device *dev, const char *level,
1411                     const char *fmt, ...);
1412 
1413 #define ata_port_err(ap, fmt, ...)                              \
1414         ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1415 #define ata_port_warn(ap, fmt, ...)                             \
1416         ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1417 #define ata_port_notice(ap, fmt, ...)                           \
1418         ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1419 #define ata_port_info(ap, fmt, ...)                             \
1420         ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1421 #define ata_port_dbg(ap, fmt, ...)                              \
1422         ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1423 
1424 #define ata_link_err(link, fmt, ...)                            \
1425         ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1426 #define ata_link_warn(link, fmt, ...)                           \
1427         ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1428 #define ata_link_notice(link, fmt, ...)                         \
1429         ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1430 #define ata_link_info(link, fmt, ...)                           \
1431         ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1432 #define ata_link_dbg(link, fmt, ...)                            \
1433         ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1434 
1435 #define ata_dev_err(dev, fmt, ...)                              \
1436         ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1437 #define ata_dev_warn(dev, fmt, ...)                             \
1438         ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1439 #define ata_dev_notice(dev, fmt, ...)                           \
1440         ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1441 #define ata_dev_info(dev, fmt, ...)                             \
1442         ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1443 #define ata_dev_dbg(dev, fmt, ...)                              \
1444         ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1445 
1446 void ata_print_version(const struct device *dev, const char *version);
1447 
1448 /*
1449  * ata_eh_info helpers
1450  */
1451 extern __printf(2, 3)
1452 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1453 extern __printf(2, 3)
1454 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1455 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1456 
1457 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1458 {
1459         ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1460         ehi->flags |= ATA_EHI_HOTPLUGGED;
1461         ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1462         ehi->err_mask |= AC_ERR_ATA_BUS;
1463 }
1464 
1465 /*
1466  * port description helpers
1467  */
1468 extern __printf(2, 3)
1469 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1470 #ifdef CONFIG_PCI
1471 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1472                                const char *name);
1473 #endif
1474 
1475 static inline bool ata_tag_internal(unsigned int tag)
1476 {
1477         return tag == ATA_TAG_INTERNAL;
1478 }
1479 
1480 static inline bool ata_tag_valid(unsigned int tag)
1481 {
1482         return tag < ATA_MAX_QUEUE || ata_tag_internal(tag);
1483 }
1484 
1485 #define __ata_qc_for_each(ap, qc, tag, max_tag, fn)             \
1486         for ((tag) = 0; (tag) < (max_tag) &&                    \
1487              ({ qc = fn((ap), (tag)); 1; }); (tag)++)           \
1488 
1489 /*
1490  * Internal use only, iterate commands ignoring error handling and
1491  * status of 'qc'.
1492  */
1493 #define ata_qc_for_each_raw(ap, qc, tag)                                        \
1494         __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, __ata_qc_from_tag)
1495 
1496 /*
1497  * Iterate all potential commands that can be queued
1498  */
1499 #define ata_qc_for_each(ap, qc, tag)                                    \
1500         __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, ata_qc_from_tag)
1501 
1502 /*
1503  * Like ata_qc_for_each, but with the internal tag included
1504  */
1505 #define ata_qc_for_each_with_internal(ap, qc, tag)                      \
1506         __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE + 1, ata_qc_from_tag)
1507 
1508 /*
1509  * device helpers
1510  */
1511 static inline unsigned int ata_class_enabled(unsigned int class)
1512 {
1513         return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1514                 class == ATA_DEV_PMP || class == ATA_DEV_SEMB ||
1515                 class == ATA_DEV_ZAC;
1516 }
1517 
1518 static inline unsigned int ata_class_disabled(unsigned int class)
1519 {
1520         return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1521                 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP ||
1522                 class == ATA_DEV_ZAC_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 bool ata_fpdma_read_log_supported(struct ata_device *dev)
1641 {
1642         return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1643                 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET] &
1644                  ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED);
1645 }
1646 
1647 static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev)
1648 {
1649         return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1650                 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] &
1651                 ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED);
1652 }
1653 
1654 static inline bool ata_fpdma_zac_mgmt_out_supported(struct ata_device *dev)
1655 {
1656         return (dev->ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OFFSET] &
1657                 ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OUT);
1658 }
1659 
1660 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1661 {
1662         qc->tf.ctl |= ATA_NIEN;
1663 }
1664 
1665 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1666                                                        unsigned int tag)
1667 {
1668         if (ata_tag_valid(tag))
1669                 return &ap->qcmd[tag];
1670         return NULL;
1671 }
1672 
1673 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1674                                                      unsigned int tag)
1675 {
1676         struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1677 
1678         if (unlikely(!qc) || !ap->ops->error_handler)
1679                 return qc;
1680 
1681         if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1682                           ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1683                 return qc;
1684 
1685         return NULL;
1686 }
1687 
1688 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1689 {
1690         return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1691 }
1692 
1693 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1694 {
1695         memset(tf, 0, sizeof(*tf));
1696 
1697 #ifdef CONFIG_ATA_SFF
1698         tf->ctl = dev->link->ap->ctl;
1699 #else
1700         tf->ctl = ATA_DEVCTL_OBS;
1701 #endif
1702         if (dev->devno == 0)
1703                 tf->device = ATA_DEVICE_OBS;
1704         else
1705                 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1706 }
1707 
1708 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1709 {
1710         qc->dma_dir = DMA_NONE;
1711         qc->sg = NULL;
1712         qc->flags = 0;
1713         qc->cursg = NULL;
1714         qc->cursg_ofs = 0;
1715         qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1716         qc->n_elem = 0;
1717         qc->err_mask = 0;
1718         qc->sect_size = ATA_SECT_SIZE;
1719 
1720         ata_tf_init(qc->dev, &qc->tf);
1721 
1722         /* init result_tf such that it indicates normal completion */
1723         qc->result_tf.command = ATA_DRDY;
1724         qc->result_tf.feature = 0;
1725 }
1726 
1727 static inline int ata_try_flush_cache(const struct ata_device *dev)
1728 {
1729         return ata_id_wcache_enabled(dev->id) ||
1730                ata_id_has_flush(dev->id) ||
1731                ata_id_has_flush_ext(dev->id);
1732 }
1733 
1734 static inline unsigned int ac_err_mask(u8 status)
1735 {
1736         if (status & (ATA_BUSY | ATA_DRQ))
1737                 return AC_ERR_HSM;
1738         if (status & (ATA_ERR | ATA_DF))
1739                 return AC_ERR_DEV;
1740         return 0;
1741 }
1742 
1743 static inline unsigned int __ac_err_mask(u8 status)
1744 {
1745         unsigned int mask = ac_err_mask(status);
1746         if (mask == 0)
1747                 return AC_ERR_OTHER;
1748         return mask;
1749 }
1750 
1751 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1752 {
1753         return *(struct ata_port **)&host->hostdata[0];
1754 }
1755 
1756 static inline int ata_check_ready(u8 status)
1757 {
1758         if (!(status & ATA_BUSY))
1759                 return 1;
1760 
1761         /* 0xff indicates either no device or device not ready */
1762         if (status == 0xff)
1763                 return -ENODEV;
1764 
1765         return 0;
1766 }
1767 
1768 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1769                                          unsigned long timeout_msecs)
1770 {
1771         return from_jiffies + msecs_to_jiffies(timeout_msecs);
1772 }
1773 
1774 /* Don't open code these in drivers as there are traps. Firstly the range may
1775    change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1776    > UDMA_0. Dyma ddreigiau */
1777 
1778 static inline int ata_using_mwdma(struct ata_device *adev)
1779 {
1780         if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1781                 return 1;
1782         return 0;
1783 }
1784 
1785 static inline int ata_using_udma(struct ata_device *adev)
1786 {
1787         if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1788                 return 1;
1789         return 0;
1790 }
1791 
1792 static inline int ata_dma_enabled(struct ata_device *adev)
1793 {
1794         return (adev->dma_mode == 0xFF ? 0 : 1);
1795 }
1796 
1797 /**************************************************************************
1798  * PMP - drivers/ata/libata-pmp.c
1799  */
1800 #ifdef CONFIG_SATA_PMP
1801 
1802 extern const struct ata_port_operations sata_pmp_port_ops;
1803 
1804 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1805 extern void sata_pmp_error_handler(struct ata_port *ap);
1806 
1807 #else /* CONFIG_SATA_PMP */
1808 
1809 #define sata_pmp_port_ops               sata_port_ops
1810 #define sata_pmp_qc_defer_cmd_switch    ata_std_qc_defer
1811 #define sata_pmp_error_handler          ata_std_error_handler
1812 
1813 #endif /* CONFIG_SATA_PMP */
1814 
1815 
1816 /**************************************************************************
1817  * SFF - drivers/ata/libata-sff.c
1818  */
1819 #ifdef CONFIG_ATA_SFF
1820 
1821 extern const struct ata_port_operations ata_sff_port_ops;
1822 extern const struct ata_port_operations ata_bmdma32_port_ops;
1823 
1824 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1825 #define ATA_PIO_SHT(drv_name)                                   \
1826         ATA_BASE_SHT(drv_name),                                 \
1827         .sg_tablesize           = LIBATA_MAX_PRD,               \
1828         .dma_boundary           = ATA_DMA_BOUNDARY
1829 
1830 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1831 extern u8 ata_sff_check_status(struct ata_port *ap);
1832 extern void ata_sff_pause(struct ata_port *ap);
1833 extern void ata_sff_dma_pause(struct ata_port *ap);
1834 extern int ata_sff_busy_sleep(struct ata_port *ap,
1835                               unsigned long timeout_pat, unsigned long timeout);
1836 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1837 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1838 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1839 extern void ata_sff_exec_command(struct ata_port *ap,
1840                                  const struct ata_taskfile *tf);
1841 extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc,
1842                         unsigned char *buf, unsigned int buflen, int rw);
1843 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc,
1844                         unsigned char *buf, unsigned int buflen, int rw);
1845 extern void ata_sff_irq_on(struct ata_port *ap);
1846 extern void ata_sff_irq_clear(struct ata_port *ap);
1847 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1848                             u8 status, int in_wq);
1849 extern void ata_sff_queue_work(struct work_struct *work);
1850 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1851                 unsigned long delay);
1852 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1853 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1854 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1855 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1856                                       struct ata_queued_cmd *qc);
1857 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1858 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1859 extern void ata_sff_freeze(struct ata_port *ap);
1860 extern void ata_sff_thaw(struct ata_port *ap);
1861 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1862 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1863                                           u8 *r_err);
1864 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1865                                     unsigned long deadline);
1866 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1867                              unsigned long deadline);
1868 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1869                                unsigned long deadline);
1870 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1871 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1872 extern void ata_sff_error_handler(struct ata_port *ap);
1873 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1874 #ifdef CONFIG_PCI
1875 extern int ata_pci_sff_init_host(struct ata_host *host);
1876 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1877                                     const struct ata_port_info * const * ppi,
1878                                     struct ata_host **r_host);
1879 extern int ata_pci_sff_activate_host(struct ata_host *host,
1880                                      irq_handler_t irq_handler,
1881                                      struct scsi_host_template *sht);
1882 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1883                 const struct ata_port_info * const * ppi,
1884                 struct scsi_host_template *sht, void *host_priv, int hflags);
1885 #endif /* CONFIG_PCI */
1886 
1887 #ifdef CONFIG_ATA_BMDMA
1888 
1889 extern const struct ata_port_operations ata_bmdma_port_ops;
1890 
1891 #define ATA_BMDMA_SHT(drv_name)                                 \
1892         ATA_BASE_SHT(drv_name),                                 \
1893         .sg_tablesize           = LIBATA_MAX_PRD,               \
1894         .dma_boundary           = ATA_DMA_BOUNDARY
1895 
1896 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1897 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1898 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1899 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1900                                       struct ata_queued_cmd *qc);
1901 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1902 extern void ata_bmdma_error_handler(struct ata_port *ap);
1903 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1904 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1905 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1906 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1907 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1908 extern u8 ata_bmdma_status(struct ata_port *ap);
1909 extern int ata_bmdma_port_start(struct ata_port *ap);
1910 extern int ata_bmdma_port_start32(struct ata_port *ap);
1911 
1912 #ifdef CONFIG_PCI
1913 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1914 extern void ata_pci_bmdma_init(struct ata_host *host);
1915 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1916                                       const struct ata_port_info * const * ppi,
1917                                       struct ata_host **r_host);
1918 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1919                                   const struct ata_port_info * const * ppi,
1920                                   struct scsi_host_template *sht,
1921                                   void *host_priv, int hflags);
1922 #endif /* CONFIG_PCI */
1923 #endif /* CONFIG_ATA_BMDMA */
1924 
1925 /**
1926  *      ata_sff_busy_wait - Wait for a port status register
1927  *      @ap: Port to wait for.
1928  *      @bits: bits that must be clear
1929  *      @max: number of 10uS waits to perform
1930  *
1931  *      Waits up to max*10 microseconds for the selected bits in the port's
1932  *      status register to be cleared.
1933  *      Returns final value of status register.
1934  *
1935  *      LOCKING:
1936  *      Inherited from caller.
1937  */
1938 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1939                                    unsigned int max)
1940 {
1941         u8 status;
1942 
1943         do {
1944                 udelay(10);
1945                 status = ap->ops->sff_check_status(ap);
1946                 max--;
1947         } while (status != 0xff && (status & bits) && (max > 0));
1948 
1949         return status;
1950 }
1951 
1952 /**
1953  *      ata_wait_idle - Wait for a port to be idle.
1954  *      @ap: Port to wait for.
1955  *
1956  *      Waits up to 10ms for port's BUSY and DRQ signals to clear.
1957  *      Returns final value of status register.
1958  *
1959  *      LOCKING:
1960  *      Inherited from caller.
1961  */
1962 static inline u8 ata_wait_idle(struct ata_port *ap)
1963 {
1964         u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1965 
1966 #ifdef ATA_DEBUG
1967         if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1968                 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1969                                 status);
1970 #endif
1971 
1972         return status;
1973 }
1974 #endif /* CONFIG_ATA_SFF */
1975 
1976 #endif /* __LINUX_LIBATA_H__ */
1977 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp