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Merge tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-zesty-kernel.git] / include / linux / libata.h
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
34 #include <linux/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
40 #include <linux/sched.h>
41
42 /*
43 * Define if arch has non-standard setup. This is a _PCI_ standard
44 * not a legacy or ISA standard.
45 */
46 #ifdef CONFIG_ATA_NONSTANDARD
47 #include <asm/libata-portmap.h>
48 #else
49 #include <asm-generic/libata-portmap.h>
50 #endif
51
52 /*
53 * compile-time options: to be removed as soon as all the drivers are
54 * converted to the new debugging mechanism
55 */
56 #undef ATA_DEBUG /* debugging output */
57 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
58 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
59 #undef ATA_NDEBUG /* define to disable quick runtime checks */
60
61
62 /* note: prints function name for you */
63 #ifdef ATA_DEBUG
64 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
65 #ifdef ATA_VERBOSE_DEBUG
66 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
67 #else
68 #define VPRINTK(fmt, args...)
69 #endif /* ATA_VERBOSE_DEBUG */
70 #else
71 #define DPRINTK(fmt, args...)
72 #define VPRINTK(fmt, args...)
73 #endif /* ATA_DEBUG */
74
75 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
76
77 #define ata_print_version_once(dev, version) \
78 ({ \
79 static bool __print_once; \
80 \
81 if (!__print_once) { \
82 __print_once = true; \
83 ata_print_version(dev, version); \
84 } \
85 })
86
87 /* NEW: debug levels */
88 #define HAVE_LIBATA_MSG 1
89
90 enum {
91 ATA_MSG_DRV = 0x0001,
92 ATA_MSG_INFO = 0x0002,
93 ATA_MSG_PROBE = 0x0004,
94 ATA_MSG_WARN = 0x0008,
95 ATA_MSG_MALLOC = 0x0010,
96 ATA_MSG_CTL = 0x0020,
97 ATA_MSG_INTR = 0x0040,
98 ATA_MSG_ERR = 0x0080,
99 };
100
101 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
102 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
103 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
104 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
105 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
106 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
107 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
108 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
109
110 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
111 {
112 if (dval < 0 || dval >= (sizeof(u32) * 8))
113 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
114 if (!dval)
115 return 0;
116 return (1 << dval) - 1;
117 }
118
119 /* defines only for the constants which don't work well as enums */
120 #define ATA_TAG_POISON 0xfafbfcfdU
121
122 enum {
123 /* various global constants */
124 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
125 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
126 ATA_DEF_QUEUE = 1,
127 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
128 ATA_MAX_QUEUE = 32,
129 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
130 ATA_SHORT_PAUSE = 16,
131
132 ATAPI_MAX_DRAIN = 16 << 10,
133
134 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
135
136 ATA_SHT_EMULATED = 1,
137 ATA_SHT_THIS_ID = -1,
138 ATA_SHT_USE_CLUSTERING = 1,
139
140 /* struct ata_taskfile flags */
141 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
142 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
143 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
144 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
145 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
146 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
147 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
148
149 /* protocol flags */
150 ATA_PROT_FLAG_PIO = (1 << 0), /* is PIO */
151 ATA_PROT_FLAG_DMA = (1 << 1), /* is DMA */
152 ATA_PROT_FLAG_DATA = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
153 ATA_PROT_FLAG_NCQ = (1 << 2), /* is NCQ */
154 ATA_PROT_FLAG_ATAPI = (1 << 3), /* is ATAPI */
155
156 /* struct ata_device stuff */
157 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
158 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
159 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
160 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
161 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
162 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
163 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
164 ATA_DFLAG_AN = (1 << 7), /* AN configured */
165 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
166 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
167
168 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
169 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
170 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
171 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
172 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
173 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
174 ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */
175 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
176
177 ATA_DFLAG_DETACH = (1 << 24),
178 ATA_DFLAG_DETACHED = (1 << 25),
179
180 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
181 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */
182 ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
183
184 ATA_DEV_UNKNOWN = 0, /* unknown device */
185 ATA_DEV_ATA = 1, /* ATA device */
186 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
187 ATA_DEV_ATAPI = 3, /* ATAPI device */
188 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
189 ATA_DEV_PMP = 5, /* SATA port multiplier */
190 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
191 ATA_DEV_SEMB = 7, /* SEMB */
192 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
193 ATA_DEV_ZAC = 9, /* ZAC device */
194 ATA_DEV_NONE = 10, /* 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
209 /* struct ata_port flags */
210 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
211 /* (doesn't imply presence) */
212 ATA_FLAG_SATA = (1 << 1),
213 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
214 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
215 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
216 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
217 * doesn't handle PIO interrupts */
218 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
219 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
220 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
221 ATA_FLAG_DEBUGMSG = (1 << 13),
222 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
223 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
224 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
225 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
226 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
227 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
228 ATA_FLAG_FPDMA_AUX = (1 << 20), /* controller supports H2DFIS aux field */
229 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
230 * management */
231 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
232 * led */
233 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
234 ATA_FLAG_SAS_HOST = (1 << 24), /* SAS host */
235
236 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
237
238
239 /* struct ata_port pflags */
240 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
241 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
242 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
243 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
244 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
245 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
246 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
247 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
248 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
249 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
250
251 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
252 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
253 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
254
255 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
256 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
257 ATA_PFLAG_EXTERNAL = (1 << 22), /* eSATA/external port */
258
259 /* struct ata_queued_cmd flags */
260 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
261 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
262 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
263 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
264 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
265 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
266 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
267
268 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
269 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
270 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
271
272 /* host set flags */
273 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
274 ATA_HOST_STARTED = (1 << 1), /* Host started */
275 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
276 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */
277
278 /* bits 24:31 of host->flags are reserved for LLD specific flags */
279
280 /* various lengths of time */
281 ATA_TMOUT_BOOT = 30000, /* heuristic */
282 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
283 ATA_TMOUT_INTERNAL_QUICK = 5000,
284 ATA_TMOUT_MAX_PARK = 30000,
285
286 /*
287 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
288 * is too much without parallel probing. Use 2s if parallel
289 * probing is available, 800ms otherwise.
290 */
291 ATA_TMOUT_FF_WAIT_LONG = 2000,
292 ATA_TMOUT_FF_WAIT = 800,
293
294 /* Spec mandates to wait for ">= 2ms" before checking status
295 * after reset. We wait 150ms, because that was the magic
296 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
297 * the period of time between when the ATA command register is
298 * written, and then status is checked. Because waiting for
299 * "a while" before checking status is fine, post SRST, we
300 * perform this magic delay here as well.
301 *
302 * Old drivers/ide uses the 2mS rule and then waits for ready.
303 */
304 ATA_WAIT_AFTER_RESET = 150,
305
306 /* If PMP is supported, we have to do follow-up SRST. As some
307 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
308 * advised to wait only for the following duration before
309 * doing SRST.
310 */
311 ATA_TMOUT_PMP_SRST_WAIT = 5000,
312
313 /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
314 * be a spurious PHY event, so ignore the first PHY event that
315 * occurs within 10s after the policy change.
316 */
317 ATA_TMOUT_SPURIOUS_PHY = 10000,
318
319 /* ATA bus states */
320 BUS_UNKNOWN = 0,
321 BUS_DMA = 1,
322 BUS_IDLE = 2,
323 BUS_NOINTR = 3,
324 BUS_NODATA = 4,
325 BUS_TIMER = 5,
326 BUS_PIO = 6,
327 BUS_EDD = 7,
328 BUS_IDENTIFY = 8,
329 BUS_PACKET = 9,
330
331 /* SATA port states */
332 PORT_UNKNOWN = 0,
333 PORT_ENABLED = 1,
334 PORT_DISABLED = 2,
335
336 /* encoding various smaller bitmaps into a single
337 * unsigned long bitmap
338 */
339 ATA_NR_PIO_MODES = 7,
340 ATA_NR_MWDMA_MODES = 5,
341 ATA_NR_UDMA_MODES = 8,
342
343 ATA_SHIFT_PIO = 0,
344 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
345 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
346
347 /* size of buffer to pad xfers ending on unaligned boundaries */
348 ATA_DMA_PAD_SZ = 4,
349
350 /* ering size */
351 ATA_ERING_SIZE = 32,
352
353 /* return values for ->qc_defer */
354 ATA_DEFER_LINK = 1,
355 ATA_DEFER_PORT = 2,
356
357 /* desc_len for ata_eh_info and context */
358 ATA_EH_DESC_LEN = 80,
359
360 /* reset / recovery action types */
361 ATA_EH_REVALIDATE = (1 << 0),
362 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
363 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
364 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
365 ATA_EH_ENABLE_LINK = (1 << 3),
366 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
367
368 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
369 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
370 ATA_EH_ENABLE_LINK,
371
372 /* ata_eh_info->flags */
373 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
374 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
375 ATA_EHI_QUIET = (1 << 3), /* be quiet */
376 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
377
378 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
379 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
380 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
381 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
382 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
383
384 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
385
386 /* mask of flags to transfer *to* the slave link */
387 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
388
389 /* max tries if error condition is still set after ->error_handler */
390 ATA_EH_MAX_TRIES = 5,
391
392 /* sometimes resuming a link requires several retries */
393 ATA_LINK_RESUME_TRIES = 5,
394
395 /* how hard are we gonna try to probe/recover devices */
396 ATA_PROBE_MAX_TRIES = 3,
397 ATA_EH_DEV_TRIES = 3,
398 ATA_EH_PMP_TRIES = 5,
399 ATA_EH_PMP_LINK_TRIES = 3,
400
401 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
402
403 /* This should match the actual table size of
404 * ata_eh_cmd_timeout_table in libata-eh.c.
405 */
406 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
407
408 /* Horkage types. May be set by libata or controller on drives
409 (some horkage may be drive/controller pair dependent */
410
411 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
412 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
413 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
414 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
415 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
416 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
417 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
418 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
419 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
420 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
421 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
422 not multiple of 16 bytes */
423 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
424 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
425 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
426 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
427 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
428 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */
429 ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */
430 ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19), /* don't use queued TRIM */
431 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
432 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
433 ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
434 ATA_HORKAGE_NO_NCQ_LOG = (1 << 23), /* don't use NCQ for log read */
435 ATA_HORKAGE_NOTRIM = (1 << 24), /* don't use TRIM */
436 ATA_HORKAGE_MAX_SEC_1024 = (1 << 25), /* Limit max sects to 1024 */
437
438 /* DMA mask for user DMA control: User visible values; DO NOT
439 renumber */
440 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
441 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
442 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
443
444 /* ATAPI command types */
445 ATAPI_READ = 0, /* READs */
446 ATAPI_WRITE = 1, /* WRITEs */
447 ATAPI_READ_CD = 2, /* READ CD [MSF] */
448 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
449 ATAPI_MISC = 4, /* the rest */
450
451 /* Timing constants */
452 ATA_TIMING_SETUP = (1 << 0),
453 ATA_TIMING_ACT8B = (1 << 1),
454 ATA_TIMING_REC8B = (1 << 2),
455 ATA_TIMING_CYC8B = (1 << 3),
456 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
457 ATA_TIMING_CYC8B,
458 ATA_TIMING_ACTIVE = (1 << 4),
459 ATA_TIMING_RECOVER = (1 << 5),
460 ATA_TIMING_DMACK_HOLD = (1 << 6),
461 ATA_TIMING_CYCLE = (1 << 7),
462 ATA_TIMING_UDMA = (1 << 8),
463 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
464 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
465 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
466 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
467 ATA_TIMING_UDMA,
468
469 /* ACPI constants */
470 ATA_ACPI_FILTER_SETXFER = 1 << 0,
471 ATA_ACPI_FILTER_LOCK = 1 << 1,
472 ATA_ACPI_FILTER_DIPM = 1 << 2,
473 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
474 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
475
476 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
477 ATA_ACPI_FILTER_LOCK |
478 ATA_ACPI_FILTER_DIPM,
479 };
480
481 enum ata_xfer_mask {
482 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
483 << ATA_SHIFT_PIO,
484 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
485 << ATA_SHIFT_MWDMA,
486 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
487 << ATA_SHIFT_UDMA,
488 };
489
490 enum hsm_task_states {
491 HSM_ST_IDLE, /* no command on going */
492 HSM_ST_FIRST, /* (waiting the device to)
493 write CDB or first data block */
494 HSM_ST, /* (waiting the device to) transfer data */
495 HSM_ST_LAST, /* (waiting the device to) complete command */
496 HSM_ST_ERR, /* error */
497 };
498
499 enum ata_completion_errors {
500 AC_ERR_DEV = (1 << 0), /* device reported error */
501 AC_ERR_HSM = (1 << 1), /* host state machine violation */
502 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
503 AC_ERR_MEDIA = (1 << 3), /* media error */
504 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
505 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
506 AC_ERR_SYSTEM = (1 << 6), /* system error */
507 AC_ERR_INVALID = (1 << 7), /* invalid argument */
508 AC_ERR_OTHER = (1 << 8), /* unknown */
509 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
510 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
511 };
512
513 /*
514 * Link power management policy: If you alter this, you also need to
515 * alter libata-scsi.c (for the ascii descriptions)
516 */
517 enum ata_lpm_policy {
518 ATA_LPM_UNKNOWN,
519 ATA_LPM_MAX_POWER,
520 ATA_LPM_MED_POWER,
521 ATA_LPM_MIN_POWER,
522 };
523
524 enum ata_lpm_hints {
525 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
526 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
527 };
528
529 /* forward declarations */
530 struct scsi_device;
531 struct ata_port_operations;
532 struct ata_port;
533 struct ata_link;
534 struct ata_queued_cmd;
535
536 /* typedefs */
537 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
538 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
539 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
540 unsigned long deadline);
541 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
542
543 extern struct device_attribute dev_attr_link_power_management_policy;
544 extern struct device_attribute dev_attr_unload_heads;
545 extern struct device_attribute dev_attr_em_message_type;
546 extern struct device_attribute dev_attr_em_message;
547 extern struct device_attribute dev_attr_sw_activity;
548
549 enum sw_activity {
550 OFF,
551 BLINK_ON,
552 BLINK_OFF,
553 };
554
555 struct ata_taskfile {
556 unsigned long flags; /* ATA_TFLAG_xxx */
557 u8 protocol; /* ATA_PROT_xxx */
558
559 u8 ctl; /* control reg */
560
561 u8 hob_feature; /* additional data */
562 u8 hob_nsect; /* to support LBA48 */
563 u8 hob_lbal;
564 u8 hob_lbam;
565 u8 hob_lbah;
566
567 u8 feature;
568 u8 nsect;
569 u8 lbal;
570 u8 lbam;
571 u8 lbah;
572
573 u8 device;
574
575 u8 command; /* IO operation */
576
577 u32 auxiliary; /* auxiliary field */
578 /* from SATA 3.1 and */
579 /* ATA-8 ACS-3 */
580 };
581
582 #ifdef CONFIG_ATA_SFF
583 struct ata_ioports {
584 void __iomem *cmd_addr;
585 void __iomem *data_addr;
586 void __iomem *error_addr;
587 void __iomem *feature_addr;
588 void __iomem *nsect_addr;
589 void __iomem *lbal_addr;
590 void __iomem *lbam_addr;
591 void __iomem *lbah_addr;
592 void __iomem *device_addr;
593 void __iomem *status_addr;
594 void __iomem *command_addr;
595 void __iomem *altstatus_addr;
596 void __iomem *ctl_addr;
597 #ifdef CONFIG_ATA_BMDMA
598 void __iomem *bmdma_addr;
599 #endif /* CONFIG_ATA_BMDMA */
600 void __iomem *scr_addr;
601 };
602 #endif /* CONFIG_ATA_SFF */
603
604 struct ata_host {
605 spinlock_t lock;
606 struct device *dev;
607 void __iomem * const *iomap;
608 unsigned int n_ports;
609 unsigned int n_tags; /* nr of NCQ tags */
610 void *private_data;
611 struct ata_port_operations *ops;
612 unsigned long flags;
613
614 struct mutex eh_mutex;
615 struct task_struct *eh_owner;
616
617 struct ata_port *simplex_claimed; /* channel owning the DMA */
618 struct ata_port *ports[0];
619 };
620
621 struct ata_queued_cmd {
622 struct ata_port *ap;
623 struct ata_device *dev;
624
625 struct scsi_cmnd *scsicmd;
626 void (*scsidone)(struct scsi_cmnd *);
627
628 struct ata_taskfile tf;
629 u8 cdb[ATAPI_CDB_LEN];
630
631 unsigned long flags; /* ATA_QCFLAG_xxx */
632 unsigned int tag;
633 unsigned int n_elem;
634 unsigned int orig_n_elem;
635
636 int dma_dir;
637
638 unsigned int sect_size;
639
640 unsigned int nbytes;
641 unsigned int extrabytes;
642 unsigned int curbytes;
643
644 struct scatterlist sgent;
645
646 struct scatterlist *sg;
647
648 struct scatterlist *cursg;
649 unsigned int cursg_ofs;
650
651 unsigned int err_mask;
652 struct ata_taskfile result_tf;
653 ata_qc_cb_t complete_fn;
654
655 void *private_data;
656 void *lldd_task;
657 };
658
659 struct ata_port_stats {
660 unsigned long unhandled_irq;
661 unsigned long idle_irq;
662 unsigned long rw_reqbuf;
663 };
664
665 struct ata_ering_entry {
666 unsigned int eflags;
667 unsigned int err_mask;
668 u64 timestamp;
669 };
670
671 struct ata_ering {
672 int cursor;
673 struct ata_ering_entry ring[ATA_ERING_SIZE];
674 };
675
676 struct ata_device {
677 struct ata_link *link;
678 unsigned int devno; /* 0 or 1 */
679 unsigned int horkage; /* List of broken features */
680 unsigned long flags; /* ATA_DFLAG_xxx */
681 struct scsi_device *sdev; /* attached SCSI device */
682 void *private_data;
683 #ifdef CONFIG_ATA_ACPI
684 union acpi_object *gtf_cache;
685 unsigned int gtf_filter;
686 #endif
687 #ifdef CONFIG_SATA_ZPODD
688 void *zpodd;
689 #endif
690 struct device tdev;
691 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
692 u64 n_sectors; /* size of device, if ATA */
693 u64 n_native_sectors; /* native size, if ATA */
694 unsigned int class; /* ATA_DEV_xxx */
695 unsigned long unpark_deadline;
696
697 u8 pio_mode;
698 u8 dma_mode;
699 u8 xfer_mode;
700 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
701
702 unsigned int multi_count; /* sectors count for
703 READ/WRITE MULTIPLE */
704 unsigned int max_sectors; /* per-device max sectors */
705 unsigned int cdb_len;
706
707 /* per-dev xfer mask */
708 unsigned long pio_mask;
709 unsigned long mwdma_mask;
710 unsigned long udma_mask;
711
712 /* for CHS addressing */
713 u16 cylinders; /* Number of cylinders */
714 u16 heads; /* Number of heads */
715 u16 sectors; /* Number of sectors per track */
716
717 union {
718 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
719 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
720 };
721
722 /* DEVSLP Timing Variables from Identify Device Data Log */
723 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE];
724
725 /* NCQ send and receive log subcommand support */
726 u8 ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE];
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];
838 unsigned long sas_tag_allocated; /* for sas tag allocation only */
839 unsigned int 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_device *dev,
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 /*
1030 * protocol tests
1031 */
1032 static inline unsigned int ata_prot_flags(u8 prot)
1033 {
1034 switch (prot) {
1035 case ATA_PROT_NODATA:
1036 return 0;
1037 case ATA_PROT_PIO:
1038 return ATA_PROT_FLAG_PIO;
1039 case ATA_PROT_DMA:
1040 return ATA_PROT_FLAG_DMA;
1041 case ATA_PROT_NCQ:
1042 return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
1043 case ATAPI_PROT_NODATA:
1044 return ATA_PROT_FLAG_ATAPI;
1045 case ATAPI_PROT_PIO:
1046 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
1047 case ATAPI_PROT_DMA:
1048 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
1049 }
1050 return 0;
1051 }
1052
1053 static inline int ata_is_atapi(u8 prot)
1054 {
1055 return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
1056 }
1057
1058 static inline int ata_is_nodata(u8 prot)
1059 {
1060 return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
1061 }
1062
1063 static inline int ata_is_pio(u8 prot)
1064 {
1065 return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
1066 }
1067
1068 static inline int ata_is_dma(u8 prot)
1069 {
1070 return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
1071 }
1072
1073 static inline int ata_is_ncq(u8 prot)
1074 {
1075 return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
1076 }
1077
1078 static inline int ata_is_data(u8 prot)
1079 {
1080 return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
1081 }
1082
1083 static inline int is_multi_taskfile(struct ata_taskfile *tf)
1084 {
1085 return (tf->command == ATA_CMD_READ_MULTI) ||
1086 (tf->command == ATA_CMD_WRITE_MULTI) ||
1087 (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1088 (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1089 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1090 }
1091
1092 static inline const unsigned long *
1093 sata_ehc_deb_timing(struct ata_eh_context *ehc)
1094 {
1095 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
1096 return sata_deb_timing_hotplug;
1097 else
1098 return sata_deb_timing_normal;
1099 }
1100
1101 static inline int ata_port_is_dummy(struct ata_port *ap)
1102 {
1103 return ap->ops == &ata_dummy_port_ops;
1104 }
1105
1106 extern int sata_set_spd(struct ata_link *link);
1107 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
1108 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
1109 int (*check_ready)(struct ata_link *link));
1110 extern int sata_link_debounce(struct ata_link *link,
1111 const unsigned long *params, unsigned long deadline);
1112 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
1113 unsigned long deadline);
1114 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
1115 bool spm_wakeup);
1116 extern int sata_link_hardreset(struct ata_link *link,
1117 const unsigned long *timing, unsigned long deadline,
1118 bool *online, int (*check_ready)(struct ata_link *));
1119 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
1120 unsigned long deadline);
1121 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1122
1123 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
1124 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
1125 const struct ata_port_info * const * ppi, int n_ports);
1126 extern int ata_slave_link_init(struct ata_port *ap);
1127 extern int ata_host_start(struct ata_host *host);
1128 extern int ata_host_register(struct ata_host *host,
1129 struct scsi_host_template *sht);
1130 extern int ata_host_activate(struct ata_host *host, int irq,
1131 irq_handler_t irq_handler, unsigned long irq_flags,
1132 struct scsi_host_template *sht);
1133 extern void ata_host_detach(struct ata_host *host);
1134 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
1135 extern int ata_scsi_detect(struct scsi_host_template *sht);
1136 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
1137 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1138 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1139 int cmd, void __user *arg);
1140 extern void ata_sas_port_destroy(struct ata_port *);
1141 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1142 struct ata_port_info *, struct Scsi_Host *);
1143 extern void ata_sas_async_probe(struct ata_port *ap);
1144 extern int ata_sas_sync_probe(struct ata_port *ap);
1145 extern int ata_sas_port_init(struct ata_port *);
1146 extern int ata_sas_port_start(struct ata_port *ap);
1147 extern void ata_sas_port_stop(struct ata_port *ap);
1148 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1149 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1150 extern int sata_scr_valid(struct ata_link *link);
1151 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1152 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1153 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1154 extern bool ata_link_online(struct ata_link *link);
1155 extern bool ata_link_offline(struct ata_link *link);
1156 #ifdef CONFIG_PM
1157 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1158 extern void ata_host_resume(struct ata_host *host);
1159 extern void ata_sas_port_suspend(struct ata_port *ap);
1160 extern void ata_sas_port_resume(struct ata_port *ap);
1161 #else
1162 static inline void ata_sas_port_suspend(struct ata_port *ap)
1163 {
1164 }
1165 static inline void ata_sas_port_resume(struct ata_port *ap)
1166 {
1167 }
1168 #endif
1169 extern int ata_ratelimit(void);
1170 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1171 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1172 u32 val, unsigned long interval, unsigned long timeout);
1173 extern int atapi_cmd_type(u8 opcode);
1174 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1175 u8 pmp, int is_cmd, u8 *fis);
1176 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1177 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1178 unsigned long mwdma_mask, unsigned long udma_mask);
1179 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1180 unsigned long *pio_mask, unsigned long *mwdma_mask,
1181 unsigned long *udma_mask);
1182 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1183 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1184 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1185 extern const char *ata_mode_string(unsigned long xfer_mask);
1186 extern unsigned long ata_id_xfermask(const u16 *id);
1187 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1188 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1189 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1190 unsigned int n_elem);
1191 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1192 extern void ata_dev_disable(struct ata_device *adev);
1193 extern void ata_id_string(const u16 *id, unsigned char *s,
1194 unsigned int ofs, unsigned int len);
1195 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1196 unsigned int ofs, unsigned int len);
1197 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1198 struct ata_taskfile *tf, u16 *id);
1199 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1200 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1201 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1202 extern int ata_std_bios_param(struct scsi_device *sdev,
1203 struct block_device *bdev,
1204 sector_t capacity, int geom[]);
1205 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1206 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1207 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1208 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1209 int queue_depth);
1210 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1211 int queue_depth);
1212 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1213 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1214 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1215 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1216 extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
1217
1218 extern int ata_cable_40wire(struct ata_port *ap);
1219 extern int ata_cable_80wire(struct ata_port *ap);
1220 extern int ata_cable_sata(struct ata_port *ap);
1221 extern int ata_cable_ignore(struct ata_port *ap);
1222 extern int ata_cable_unknown(struct ata_port *ap);
1223
1224 /* Timing helpers */
1225 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1226 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1227 extern int ata_timing_compute(struct ata_device *, unsigned short,
1228 struct ata_timing *, int, int);
1229 extern void ata_timing_merge(const struct ata_timing *,
1230 const struct ata_timing *, struct ata_timing *,
1231 unsigned int);
1232 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1233
1234 /* PCI */
1235 #ifdef CONFIG_PCI
1236 struct pci_dev;
1237
1238 struct pci_bits {
1239 unsigned int reg; /* PCI config register to read */
1240 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1241 unsigned long mask;
1242 unsigned long val;
1243 };
1244
1245 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1246 extern void ata_pci_remove_one(struct pci_dev *pdev);
1247
1248 #ifdef CONFIG_PM
1249 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1250 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1251 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1252 extern int ata_pci_device_resume(struct pci_dev *pdev);
1253 #endif /* CONFIG_PM */
1254 #endif /* CONFIG_PCI */
1255
1256 struct platform_device;
1257
1258 extern int ata_platform_remove_one(struct platform_device *pdev);
1259
1260 /*
1261 * ACPI - drivers/ata/libata-acpi.c
1262 */
1263 #ifdef CONFIG_ATA_ACPI
1264 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1265 {
1266 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1267 return &ap->__acpi_init_gtm;
1268 return NULL;
1269 }
1270 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1271 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1272 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1273 const struct ata_acpi_gtm *gtm);
1274 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1275 #else
1276 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1277 {
1278 return NULL;
1279 }
1280
1281 static inline int ata_acpi_stm(const struct ata_port *ap,
1282 struct ata_acpi_gtm *stm)
1283 {
1284 return -ENOSYS;
1285 }
1286
1287 static inline int ata_acpi_gtm(const struct ata_port *ap,
1288 struct ata_acpi_gtm *stm)
1289 {
1290 return -ENOSYS;
1291 }
1292
1293 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1294 const struct ata_acpi_gtm *gtm)
1295 {
1296 return 0;
1297 }
1298
1299 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1300 const struct ata_acpi_gtm *gtm)
1301 {
1302 return 0;
1303 }
1304 #endif
1305
1306 /*
1307 * EH - drivers/ata/libata-eh.c
1308 */
1309 extern void ata_port_schedule_eh(struct ata_port *ap);
1310 extern void ata_port_wait_eh(struct ata_port *ap);
1311 extern int ata_link_abort(struct ata_link *link);
1312 extern int ata_port_abort(struct ata_port *ap);
1313 extern int ata_port_freeze(struct ata_port *ap);
1314 extern int sata_async_notification(struct ata_port *ap);
1315
1316 extern void ata_eh_freeze_port(struct ata_port *ap);
1317 extern void ata_eh_thaw_port(struct ata_port *ap);
1318
1319 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1320 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1321 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1322
1323 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1324 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1325 ata_postreset_fn_t postreset);
1326 extern void ata_std_error_handler(struct ata_port *ap);
1327 extern void ata_std_sched_eh(struct ata_port *ap);
1328 extern void ata_std_end_eh(struct ata_port *ap);
1329 extern int ata_link_nr_enabled(struct ata_link *link);
1330
1331 /*
1332 * Base operations to inherit from and initializers for sht
1333 *
1334 * Operations
1335 *
1336 * base : Common to all libata drivers.
1337 * sata : SATA controllers w/ native interface.
1338 * pmp : SATA controllers w/ PMP support.
1339 * sff : SFF ATA controllers w/o BMDMA support.
1340 * bmdma : SFF ATA controllers w/ BMDMA support.
1341 *
1342 * sht initializers
1343 *
1344 * BASE : Common to all libata drivers. The user must set
1345 * sg_tablesize and dma_boundary.
1346 * PIO : SFF ATA controllers w/ only PIO support.
1347 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1348 * dma_boundary are set to BMDMA limits.
1349 * NCQ : SATA controllers supporting NCQ. The user must set
1350 * sg_tablesize, dma_boundary and can_queue.
1351 */
1352 extern const struct ata_port_operations ata_base_port_ops;
1353 extern const struct ata_port_operations sata_port_ops;
1354 extern struct device_attribute *ata_common_sdev_attrs[];
1355
1356 /*
1357 * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
1358 * by the edge drivers. Because the 'module' field of sht must be the
1359 * edge driver's module reference, otherwise the driver can be unloaded
1360 * even if the scsi_device is being accessed.
1361 */
1362 #define ATA_BASE_SHT(drv_name) \
1363 .module = THIS_MODULE, \
1364 .name = drv_name, \
1365 .ioctl = ata_scsi_ioctl, \
1366 .queuecommand = ata_scsi_queuecmd, \
1367 .can_queue = ATA_DEF_QUEUE, \
1368 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \
1369 .this_id = ATA_SHT_THIS_ID, \
1370 .emulated = ATA_SHT_EMULATED, \
1371 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1372 .proc_name = drv_name, \
1373 .slave_configure = ata_scsi_slave_config, \
1374 .slave_destroy = ata_scsi_slave_destroy, \
1375 .bios_param = ata_std_bios_param, \
1376 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1377 .sdev_attrs = ata_common_sdev_attrs
1378
1379 #define ATA_NCQ_SHT(drv_name) \
1380 ATA_BASE_SHT(drv_name), \
1381 .change_queue_depth = ata_scsi_change_queue_depth
1382
1383 /*
1384 * PMP helpers
1385 */
1386 #ifdef CONFIG_SATA_PMP
1387 static inline bool sata_pmp_supported(struct ata_port *ap)
1388 {
1389 return ap->flags & ATA_FLAG_PMP;
1390 }
1391
1392 static inline bool sata_pmp_attached(struct ata_port *ap)
1393 {
1394 return ap->nr_pmp_links != 0;
1395 }
1396
1397 static inline int ata_is_host_link(const struct ata_link *link)
1398 {
1399 return link == &link->ap->link || link == link->ap->slave_link;
1400 }
1401 #else /* CONFIG_SATA_PMP */
1402 static inline bool sata_pmp_supported(struct ata_port *ap)
1403 {
1404 return false;
1405 }
1406
1407 static inline bool sata_pmp_attached(struct ata_port *ap)
1408 {
1409 return false;
1410 }
1411
1412 static inline int ata_is_host_link(const struct ata_link *link)
1413 {
1414 return 1;
1415 }
1416 #endif /* CONFIG_SATA_PMP */
1417
1418 static inline int sata_srst_pmp(struct ata_link *link)
1419 {
1420 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1421 return SATA_PMP_CTRL_PORT;
1422 return link->pmp;
1423 }
1424
1425 /*
1426 * printk helpers
1427 */
1428 __printf(3, 4)
1429 void ata_port_printk(const struct ata_port *ap, const char *level,
1430 const char *fmt, ...);
1431 __printf(3, 4)
1432 void ata_link_printk(const struct ata_link *link, const char *level,
1433 const char *fmt, ...);
1434 __printf(3, 4)
1435 void ata_dev_printk(const struct ata_device *dev, const char *level,
1436 const char *fmt, ...);
1437
1438 #define ata_port_err(ap, fmt, ...) \
1439 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1440 #define ata_port_warn(ap, fmt, ...) \
1441 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1442 #define ata_port_notice(ap, fmt, ...) \
1443 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1444 #define ata_port_info(ap, fmt, ...) \
1445 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1446 #define ata_port_dbg(ap, fmt, ...) \
1447 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1448
1449 #define ata_link_err(link, fmt, ...) \
1450 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1451 #define ata_link_warn(link, fmt, ...) \
1452 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1453 #define ata_link_notice(link, fmt, ...) \
1454 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1455 #define ata_link_info(link, fmt, ...) \
1456 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1457 #define ata_link_dbg(link, fmt, ...) \
1458 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1459
1460 #define ata_dev_err(dev, fmt, ...) \
1461 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1462 #define ata_dev_warn(dev, fmt, ...) \
1463 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1464 #define ata_dev_notice(dev, fmt, ...) \
1465 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1466 #define ata_dev_info(dev, fmt, ...) \
1467 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1468 #define ata_dev_dbg(dev, fmt, ...) \
1469 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1470
1471 void ata_print_version(const struct device *dev, const char *version);
1472
1473 /*
1474 * ata_eh_info helpers
1475 */
1476 extern __printf(2, 3)
1477 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1478 extern __printf(2, 3)
1479 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1480 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1481
1482 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1483 {
1484 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1485 ehi->flags |= ATA_EHI_HOTPLUGGED;
1486 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1487 ehi->err_mask |= AC_ERR_ATA_BUS;
1488 }
1489
1490 /*
1491 * port description helpers
1492 */
1493 extern __printf(2, 3)
1494 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1495 #ifdef CONFIG_PCI
1496 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1497 const char *name);
1498 #endif
1499
1500 static inline unsigned int ata_tag_valid(unsigned int tag)
1501 {
1502 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1503 }
1504
1505 static inline unsigned int ata_tag_internal(unsigned int tag)
1506 {
1507 return tag == ATA_TAG_INTERNAL;
1508 }
1509
1510 /*
1511 * device helpers
1512 */
1513 static inline unsigned int ata_class_enabled(unsigned int class)
1514 {
1515 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1516 class == ATA_DEV_PMP || class == ATA_DEV_SEMB ||
1517 class == ATA_DEV_ZAC;
1518 }
1519
1520 static inline unsigned int ata_class_disabled(unsigned int class)
1521 {
1522 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1523 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1524 }
1525
1526 static inline unsigned int ata_class_absent(unsigned int class)
1527 {
1528 return !ata_class_enabled(class) && !ata_class_disabled(class);
1529 }
1530
1531 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1532 {
1533 return ata_class_enabled(dev->class);
1534 }
1535
1536 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1537 {
1538 return ata_class_disabled(dev->class);
1539 }
1540
1541 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1542 {
1543 return ata_class_absent(dev->class);
1544 }
1545
1546 /*
1547 * link helpers
1548 */
1549 static inline int ata_link_max_devices(const struct ata_link *link)
1550 {
1551 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1552 return 2;
1553 return 1;
1554 }
1555
1556 static inline int ata_link_active(struct ata_link *link)
1557 {
1558 return ata_tag_valid(link->active_tag) || link->sactive;
1559 }
1560
1561 /*
1562 * Iterators
1563 *
1564 * ATA_LITER_* constants are used to select link iteration mode and
1565 * ATA_DITER_* device iteration mode.
1566 *
1567 * For a custom iteration directly using ata_{link|dev}_next(), if
1568 * @link or @dev, respectively, is NULL, the first element is
1569 * returned. @dev and @link can be any valid device or link and the
1570 * next element according to the iteration mode will be returned.
1571 * After the last element, NULL is returned.
1572 */
1573 enum ata_link_iter_mode {
1574 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1575 * host link. no slave link */
1576 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1577 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1578 * slave link still comes after host link */
1579 };
1580
1581 enum ata_dev_iter_mode {
1582 ATA_DITER_ENABLED,
1583 ATA_DITER_ENABLED_REVERSE,
1584 ATA_DITER_ALL,
1585 ATA_DITER_ALL_REVERSE,
1586 };
1587
1588 extern struct ata_link *ata_link_next(struct ata_link *link,
1589 struct ata_port *ap,
1590 enum ata_link_iter_mode mode);
1591
1592 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1593 struct ata_link *link,
1594 enum ata_dev_iter_mode mode);
1595
1596 /*
1597 * Shortcut notation for iterations
1598 *
1599 * ata_for_each_link() iterates over each link of @ap according to
1600 * @mode. @link points to the current link in the loop. @link is
1601 * NULL after loop termination. ata_for_each_dev() works the same way
1602 * except that it iterates over each device of @link.
1603 *
1604 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1605 * specified when using the following shorthand notations. Only the
1606 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1607 * specified. This not only increases brevity but also makes it
1608 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1609 */
1610 #define ata_for_each_link(link, ap, mode) \
1611 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1612 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1613
1614 #define ata_for_each_dev(dev, link, mode) \
1615 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1616 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1617
1618 /**
1619 * ata_ncq_enabled - Test whether NCQ is enabled
1620 * @dev: ATA device to test for
1621 *
1622 * LOCKING:
1623 * spin_lock_irqsave(host lock)
1624 *
1625 * RETURNS:
1626 * 1 if NCQ is enabled for @dev, 0 otherwise.
1627 */
1628 static inline int ata_ncq_enabled(struct ata_device *dev)
1629 {
1630 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1631 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1632 }
1633
1634 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev)
1635 {
1636 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1637 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &
1638 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM);
1639 }
1640
1641 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1642 {
1643 qc->tf.ctl |= ATA_NIEN;
1644 }
1645
1646 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1647 unsigned int tag)
1648 {
1649 if (likely(ata_tag_valid(tag)))
1650 return &ap->qcmd[tag];
1651 return NULL;
1652 }
1653
1654 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1655 unsigned int tag)
1656 {
1657 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1658
1659 if (unlikely(!qc) || !ap->ops->error_handler)
1660 return qc;
1661
1662 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1663 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1664 return qc;
1665
1666 return NULL;
1667 }
1668
1669 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1670 {
1671 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1672 }
1673
1674 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1675 {
1676 memset(tf, 0, sizeof(*tf));
1677
1678 #ifdef CONFIG_ATA_SFF
1679 tf->ctl = dev->link->ap->ctl;
1680 #else
1681 tf->ctl = ATA_DEVCTL_OBS;
1682 #endif
1683 if (dev->devno == 0)
1684 tf->device = ATA_DEVICE_OBS;
1685 else
1686 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1687 }
1688
1689 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1690 {
1691 qc->dma_dir = DMA_NONE;
1692 qc->sg = NULL;
1693 qc->flags = 0;
1694 qc->cursg = NULL;
1695 qc->cursg_ofs = 0;
1696 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1697 qc->n_elem = 0;
1698 qc->err_mask = 0;
1699 qc->sect_size = ATA_SECT_SIZE;
1700
1701 ata_tf_init(qc->dev, &qc->tf);
1702
1703 /* init result_tf such that it indicates normal completion */
1704 qc->result_tf.command = ATA_DRDY;
1705 qc->result_tf.feature = 0;
1706 }
1707
1708 static inline int ata_try_flush_cache(const struct ata_device *dev)
1709 {
1710 return ata_id_wcache_enabled(dev->id) ||
1711 ata_id_has_flush(dev->id) ||
1712 ata_id_has_flush_ext(dev->id);
1713 }
1714
1715 static inline unsigned int ac_err_mask(u8 status)
1716 {
1717 if (status & (ATA_BUSY | ATA_DRQ))
1718 return AC_ERR_HSM;
1719 if (status & (ATA_ERR | ATA_DF))
1720 return AC_ERR_DEV;
1721 return 0;
1722 }
1723
1724 static inline unsigned int __ac_err_mask(u8 status)
1725 {
1726 unsigned int mask = ac_err_mask(status);
1727 if (mask == 0)
1728 return AC_ERR_OTHER;
1729 return mask;
1730 }
1731
1732 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1733 {
1734 return *(struct ata_port **)&host->hostdata[0];
1735 }
1736
1737 static inline int ata_check_ready(u8 status)
1738 {
1739 if (!(status & ATA_BUSY))
1740 return 1;
1741
1742 /* 0xff indicates either no device or device not ready */
1743 if (status == 0xff)
1744 return -ENODEV;
1745
1746 return 0;
1747 }
1748
1749 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1750 unsigned long timeout_msecs)
1751 {
1752 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1753 }
1754
1755 /* Don't open code these in drivers as there are traps. Firstly the range may
1756 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1757 > UDMA_0. Dyma ddreigiau */
1758
1759 static inline int ata_using_mwdma(struct ata_device *adev)
1760 {
1761 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1762 return 1;
1763 return 0;
1764 }
1765
1766 static inline int ata_using_udma(struct ata_device *adev)
1767 {
1768 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1769 return 1;
1770 return 0;
1771 }
1772
1773 static inline int ata_dma_enabled(struct ata_device *adev)
1774 {
1775 return (adev->dma_mode == 0xFF ? 0 : 1);
1776 }
1777
1778 /**************************************************************************
1779 * PMP - drivers/ata/libata-pmp.c
1780 */
1781 #ifdef CONFIG_SATA_PMP
1782
1783 extern const struct ata_port_operations sata_pmp_port_ops;
1784
1785 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1786 extern void sata_pmp_error_handler(struct ata_port *ap);
1787
1788 #else /* CONFIG_SATA_PMP */
1789
1790 #define sata_pmp_port_ops sata_port_ops
1791 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1792 #define sata_pmp_error_handler ata_std_error_handler
1793
1794 #endif /* CONFIG_SATA_PMP */
1795
1796
1797 /**************************************************************************
1798 * SFF - drivers/ata/libata-sff.c
1799 */
1800 #ifdef CONFIG_ATA_SFF
1801
1802 extern const struct ata_port_operations ata_sff_port_ops;
1803 extern const struct ata_port_operations ata_bmdma32_port_ops;
1804
1805 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1806 #define ATA_PIO_SHT(drv_name) \
1807 ATA_BASE_SHT(drv_name), \
1808 .sg_tablesize = LIBATA_MAX_PRD, \
1809 .dma_boundary = ATA_DMA_BOUNDARY
1810
1811 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1812 extern u8 ata_sff_check_status(struct ata_port *ap);
1813 extern void ata_sff_pause(struct ata_port *ap);
1814 extern void ata_sff_dma_pause(struct ata_port *ap);
1815 extern int ata_sff_busy_sleep(struct ata_port *ap,
1816 unsigned long timeout_pat, unsigned long timeout);
1817 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1818 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1819 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1820 extern void ata_sff_exec_command(struct ata_port *ap,
1821 const struct ata_taskfile *tf);
1822 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1823 unsigned char *buf, unsigned int buflen, int rw);
1824 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1825 unsigned char *buf, unsigned int buflen, int rw);
1826 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1827 unsigned char *buf, unsigned int buflen, int rw);
1828 extern void ata_sff_irq_on(struct ata_port *ap);
1829 extern void ata_sff_irq_clear(struct ata_port *ap);
1830 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1831 u8 status, int in_wq);
1832 extern void ata_sff_queue_work(struct work_struct *work);
1833 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1834 unsigned long delay);
1835 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1836 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1837 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1838 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1839 struct ata_queued_cmd *qc);
1840 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1841 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1842 extern void ata_sff_freeze(struct ata_port *ap);
1843 extern void ata_sff_thaw(struct ata_port *ap);
1844 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1845 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1846 u8 *r_err);
1847 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1848 unsigned long deadline);
1849 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1850 unsigned long deadline);
1851 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1852 unsigned long deadline);
1853 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1854 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1855 extern void ata_sff_error_handler(struct ata_port *ap);
1856 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1857 #ifdef CONFIG_PCI
1858 extern int ata_pci_sff_init_host(struct ata_host *host);
1859 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1860 const struct ata_port_info * const * ppi,
1861 struct ata_host **r_host);
1862 extern int ata_pci_sff_activate_host(struct ata_host *host,
1863 irq_handler_t irq_handler,
1864 struct scsi_host_template *sht);
1865 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1866 const struct ata_port_info * const * ppi,
1867 struct scsi_host_template *sht, void *host_priv, int hflags);
1868 #endif /* CONFIG_PCI */
1869
1870 #ifdef CONFIG_ATA_BMDMA
1871
1872 extern const struct ata_port_operations ata_bmdma_port_ops;
1873
1874 #define ATA_BMDMA_SHT(drv_name) \
1875 ATA_BASE_SHT(drv_name), \
1876 .sg_tablesize = LIBATA_MAX_PRD, \
1877 .dma_boundary = ATA_DMA_BOUNDARY
1878
1879 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1880 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1881 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1882 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1883 struct ata_queued_cmd *qc);
1884 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1885 extern void ata_bmdma_error_handler(struct ata_port *ap);
1886 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1887 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1888 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1889 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1890 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1891 extern u8 ata_bmdma_status(struct ata_port *ap);
1892 extern int ata_bmdma_port_start(struct ata_port *ap);
1893 extern int ata_bmdma_port_start32(struct ata_port *ap);
1894
1895 #ifdef CONFIG_PCI
1896 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1897 extern void ata_pci_bmdma_init(struct ata_host *host);
1898 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1899 const struct ata_port_info * const * ppi,
1900 struct ata_host **r_host);
1901 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1902 const struct ata_port_info * const * ppi,
1903 struct scsi_host_template *sht,
1904 void *host_priv, int hflags);
1905 #endif /* CONFIG_PCI */
1906 #endif /* CONFIG_ATA_BMDMA */
1907
1908 /**
1909 * ata_sff_busy_wait - Wait for a port status register
1910 * @ap: Port to wait for.
1911 * @bits: bits that must be clear
1912 * @max: number of 10uS waits to perform
1913 *
1914 * Waits up to max*10 microseconds for the selected bits in the port's
1915 * status register to be cleared.
1916 * Returns final value of status register.
1917 *
1918 * LOCKING:
1919 * Inherited from caller.
1920 */
1921 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1922 unsigned int max)
1923 {
1924 u8 status;
1925
1926 do {
1927 udelay(10);
1928 status = ap->ops->sff_check_status(ap);
1929 max--;
1930 } while (status != 0xff && (status & bits) && (max > 0));
1931
1932 return status;
1933 }
1934
1935 /**
1936 * ata_wait_idle - Wait for a port to be idle.
1937 * @ap: Port to wait for.
1938 *
1939 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1940 * Returns final value of status register.
1941 *
1942 * LOCKING:
1943 * Inherited from caller.
1944 */
1945 static inline u8 ata_wait_idle(struct ata_port *ap)
1946 {
1947 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1948
1949 #ifdef ATA_DEBUG
1950 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1951 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1952 status);
1953 #endif
1954
1955 return status;
1956 }
1957 #endif /* CONFIG_ATA_SFF */
1958
1959 #endif /* __LINUX_LIBATA_H__ */
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