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 #include <linux/async.h>
26
27 /*
28 * Define if arch has non-standard setup. This is a _PCI_ standard
29 * not a legacy or ISA standard.
30 */
31 #ifdef CONFIG_ATA_NONSTANDARD
32 #include <asm/libata-portmap.h>
33 #else
34 #define ATA_PRIMARY_IRQ(dev) 14
35 #define ATA_SECONDARY_IRQ(dev) 15
36 #endif
37
38 /*
39 * compile-time options: to be removed as soon as all the drivers are
40 * converted to the new debugging mechanism
41 */
42 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
43
44
45 #define ata_print_version_once(dev, version) \
46 ({ \
47 static bool __print_once; \
48 \
49 if (!__print_once) { \
50 __print_once = true; \
51 ata_print_version(dev, version); \
52 } \
53 })
54
55 /* defines only for the constants which don't work well as enums */
56 #define ATA_TAG_POISON 0xfafbfcfdU
57
58 enum {
59 /* various global constants */
60 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
61 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
62 ATA_DEF_QUEUE = 1,
63 ATA_MAX_QUEUE = 32,
64 ATA_TAG_INTERNAL = ATA_MAX_QUEUE,
65 ATA_SHORT_PAUSE = 16,
66
67 ATAPI_MAX_DRAIN = 16 << 10,
68
69 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
70
71 ATA_SHT_EMULATED = 1,
72 ATA_SHT_THIS_ID = -1,
73
74 /* struct ata_taskfile flags */
75 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
76 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
77 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
78 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
79 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
80 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
81 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
82
83 /* struct ata_device stuff */
84 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
85 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
86 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
87 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
88 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
89 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
90 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
91 ATA_DFLAG_AN = (1 << 7), /* AN configured */
92 ATA_DFLAG_TRUSTED = (1 << 8), /* device supports trusted send/recv */
93 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
94 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
95
96 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
97 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
98 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
99 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
100 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
101 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
102 ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */
103 ATA_DFLAG_NCQ_PRIO = (1 << 20), /* device supports NCQ priority */
104 ATA_DFLAG_NCQ_PRIO_ENABLED = (1 << 21), /* Priority cmds sent to dev */
105 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
106
107 ATA_DFLAG_DETACH = (1 << 24),
108 ATA_DFLAG_DETACHED = (1 << 25),
109
110 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
111 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */
112 ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
113 ATA_DFLAG_D_SENSE = (1 << 29), /* Descriptor sense requested */
114 ATA_DFLAG_ZAC = (1 << 30), /* ZAC device */
115
116 ATA_DFLAG_FEATURES_MASK = ATA_DFLAG_TRUSTED | ATA_DFLAG_DA | \
117 ATA_DFLAG_DEVSLP | ATA_DFLAG_NCQ_SEND_RECV | \
118 ATA_DFLAG_NCQ_PRIO,
119
120 ATA_DEV_UNKNOWN = 0, /* unknown device */
121 ATA_DEV_ATA = 1, /* ATA device */
122 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
123 ATA_DEV_ATAPI = 3, /* ATAPI device */
124 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
125 ATA_DEV_PMP = 5, /* SATA port multiplier */
126 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
127 ATA_DEV_SEMB = 7, /* SEMB */
128 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
129 ATA_DEV_ZAC = 9, /* ZAC device */
130 ATA_DEV_ZAC_UNSUP = 10, /* ZAC device (unsupported) */
131 ATA_DEV_NONE = 11, /* no device */
132
133 /* struct ata_link flags */
134 /* NOTE: struct ata_force_param currently stores lflags in u16 */
135 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
136 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
137 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
138 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
139 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
140 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
141 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
142 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
143 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
144 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */
145 ATA_LFLAG_CHANGED = (1 << 10), /* LPM state changed on this link */
146 ATA_LFLAG_NO_DEBOUNCE_DELAY = (1 << 11), /* no debounce delay on link resume */
147
148 /* struct ata_port flags */
149 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
150 /* (doesn't imply presence) */
151 ATA_FLAG_SATA = (1 << 1),
152 ATA_FLAG_NO_LPM = (1 << 2), /* host not happy with LPM */
153 ATA_FLAG_NO_LOG_PAGE = (1 << 5), /* do not issue log page read */
154 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
155 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
156 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
157 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
158 * doesn't handle PIO interrupts */
159 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
160 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
161 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
162 ATA_FLAG_DEBUGMSG = (1 << 13),
163 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
164 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
165 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
166 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
167 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
168 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
169 ATA_FLAG_FPDMA_AUX = (1 << 20), /* controller supports H2DFIS aux field */
170 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
171 * management */
172 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
173 * led */
174 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
175 ATA_FLAG_SAS_HOST = (1 << 24), /* SAS host */
176
177 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
178
179
180 /* struct ata_port pflags */
181 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
182 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
183 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
184 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
185 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
186 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
187 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
188 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
189 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
190 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
191
192 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
193 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
194 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
195
196 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
197 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
198 ATA_PFLAG_EXTERNAL = (1 << 22), /* eSATA/external port */
199
200 /* struct ata_queued_cmd flags */
201 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
202 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
203 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
204 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
205 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
206 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
207 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
208
209 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
210 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
211 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
212
213 /* host set flags */
214 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
215 ATA_HOST_STARTED = (1 << 1), /* Host started */
216 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
217 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */
218
219 /* bits 24:31 of host->flags are reserved for LLD specific flags */
220
221 /* various lengths of time */
222 ATA_TMOUT_BOOT = 30000, /* heuristic */
223 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
224 ATA_TMOUT_INTERNAL_QUICK = 5000,
225 ATA_TMOUT_MAX_PARK = 30000,
226
227 /*
228 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
229 * is too much without parallel probing. Use 2s if parallel
230 * probing is available, 800ms otherwise.
231 */
232 ATA_TMOUT_FF_WAIT_LONG = 2000,
233 ATA_TMOUT_FF_WAIT = 800,
234
235 /* Spec mandates to wait for ">= 2ms" before checking status
236 * after reset. We wait 150ms, because that was the magic
237 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
238 * the period of time between when the ATA command register is
239 * written, and then status is checked. Because waiting for
240 * "a while" before checking status is fine, post SRST, we
241 * perform this magic delay here as well.
242 *
243 * Old drivers/ide uses the 2mS rule and then waits for ready.
244 */
245 ATA_WAIT_AFTER_RESET = 150,
246
247 /* If PMP is supported, we have to do follow-up SRST. As some
248 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
249 * advised to wait only for the following duration before
250 * doing SRST.
251 */
252 ATA_TMOUT_PMP_SRST_WAIT = 5000,
253
254 /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
255 * be a spurious PHY event, so ignore the first PHY event that
256 * occurs within 10s after the policy change.
257 */
258 ATA_TMOUT_SPURIOUS_PHY = 10000,
259
260 /* ATA bus states */
261 BUS_UNKNOWN = 0,
262 BUS_DMA = 1,
263 BUS_IDLE = 2,
264 BUS_NOINTR = 3,
265 BUS_NODATA = 4,
266 BUS_TIMER = 5,
267 BUS_PIO = 6,
268 BUS_EDD = 7,
269 BUS_IDENTIFY = 8,
270 BUS_PACKET = 9,
271
272 /* SATA port states */
273 PORT_UNKNOWN = 0,
274 PORT_ENABLED = 1,
275 PORT_DISABLED = 2,
276
277 /* encoding various smaller bitmaps into a single
278 * unsigned int bitmap
279 */
280 ATA_NR_PIO_MODES = 7,
281 ATA_NR_MWDMA_MODES = 5,
282 ATA_NR_UDMA_MODES = 8,
283
284 ATA_SHIFT_PIO = 0,
285 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
286 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
287 ATA_SHIFT_PRIO = 6,
288
289 ATA_PRIO_HIGH = 2,
290 /* size of buffer to pad xfers ending on unaligned boundaries */
291 ATA_DMA_PAD_SZ = 4,
292
293 /* ering size */
294 ATA_ERING_SIZE = 32,
295
296 /* return values for ->qc_defer */
297 ATA_DEFER_LINK = 1,
298 ATA_DEFER_PORT = 2,
299
300 /* desc_len for ata_eh_info and context */
301 ATA_EH_DESC_LEN = 80,
302
303 /* reset / recovery action types */
304 ATA_EH_REVALIDATE = (1 << 0),
305 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
306 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
307 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
308 ATA_EH_ENABLE_LINK = (1 << 3),
309 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
310
311 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
312 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
313 ATA_EH_ENABLE_LINK,
314
315 /* ata_eh_info->flags */
316 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
317 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
318 ATA_EHI_QUIET = (1 << 3), /* be quiet */
319 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
320
321 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
322 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
323 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
324 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
325 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
326
327 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
328
329 /* mask of flags to transfer *to* the slave link */
330 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
331
332 /* max tries if error condition is still set after ->error_handler */
333 ATA_EH_MAX_TRIES = 5,
334
335 /* sometimes resuming a link requires several retries */
336 ATA_LINK_RESUME_TRIES = 5,
337
338 /* how hard are we gonna try to probe/recover devices */
339 ATA_PROBE_MAX_TRIES = 3,
340 ATA_EH_DEV_TRIES = 3,
341 ATA_EH_PMP_TRIES = 5,
342 ATA_EH_PMP_LINK_TRIES = 3,
343
344 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
345
346 /* This should match the actual table size of
347 * ata_eh_cmd_timeout_table in libata-eh.c.
348 */
349 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 7,
350
351 /* Horkage types. May be set by libata or controller on drives
352 (some horkage may be drive/controller pair dependent */
353
354 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
355 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
356 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
357 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
358 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
359 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
360 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
361 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
362 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
363 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
364 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
365 not multiple of 16 bytes */
366 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
367 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
368 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
369 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
370 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
371 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */
372 ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */
373 ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19), /* don't use queued TRIM */
374 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
375 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
376 ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
377 ATA_HORKAGE_NO_DMA_LOG = (1 << 23), /* don't use DMA for log read */
378 ATA_HORKAGE_NOTRIM = (1 << 24), /* don't use TRIM */
379 ATA_HORKAGE_MAX_SEC_1024 = (1 << 25), /* Limit max sects to 1024 */
380 ATA_HORKAGE_MAX_TRIM_128M = (1 << 26), /* Limit max trim size to 128M */
381 ATA_HORKAGE_NO_NCQ_ON_ATI = (1 << 27), /* Disable NCQ on ATI chipset */
382 ATA_HORKAGE_NO_ID_DEV_LOG = (1 << 28), /* Identify device log missing */
383 ATA_HORKAGE_NO_LOG_DIR = (1 << 29), /* Do not read log directory */
384
385 /* DMA mask for user DMA control: User visible values; DO NOT
386 renumber */
387 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
388 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
389 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
390
391 /* ATAPI command types */
392 ATAPI_READ = 0, /* READs */
393 ATAPI_WRITE = 1, /* WRITEs */
394 ATAPI_READ_CD = 2, /* READ CD [MSF] */
395 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
396 ATAPI_MISC = 4, /* the rest */
397
398 /* Timing constants */
399 ATA_TIMING_SETUP = (1 << 0),
400 ATA_TIMING_ACT8B = (1 << 1),
401 ATA_TIMING_REC8B = (1 << 2),
402 ATA_TIMING_CYC8B = (1 << 3),
403 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
404 ATA_TIMING_CYC8B,
405 ATA_TIMING_ACTIVE = (1 << 4),
406 ATA_TIMING_RECOVER = (1 << 5),
407 ATA_TIMING_DMACK_HOLD = (1 << 6),
408 ATA_TIMING_CYCLE = (1 << 7),
409 ATA_TIMING_UDMA = (1 << 8),
410 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
411 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
412 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
413 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
414 ATA_TIMING_UDMA,
415
416 /* ACPI constants */
417 ATA_ACPI_FILTER_SETXFER = 1 << 0,
418 ATA_ACPI_FILTER_LOCK = 1 << 1,
419 ATA_ACPI_FILTER_DIPM = 1 << 2,
420 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
421 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
422
423 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
424 ATA_ACPI_FILTER_LOCK |
425 ATA_ACPI_FILTER_DIPM,
426 };
427
428 enum ata_xfer_mask {
429 ATA_MASK_PIO = ((1U << ATA_NR_PIO_MODES) - 1) << ATA_SHIFT_PIO,
430 ATA_MASK_MWDMA = ((1U << ATA_NR_MWDMA_MODES) - 1) << ATA_SHIFT_MWDMA,
431 ATA_MASK_UDMA = ((1U << ATA_NR_UDMA_MODES) - 1) << ATA_SHIFT_UDMA,
432 };
433
434 enum hsm_task_states {
435 HSM_ST_IDLE, /* no command on going */
436 HSM_ST_FIRST, /* (waiting the device to)
437 write CDB or first data block */
438 HSM_ST, /* (waiting the device to) transfer data */
439 HSM_ST_LAST, /* (waiting the device to) complete command */
440 HSM_ST_ERR, /* error */
441 };
442
443 enum ata_completion_errors {
444 AC_ERR_OK = 0, /* no error */
445 AC_ERR_DEV = (1 << 0), /* device reported error */
446 AC_ERR_HSM = (1 << 1), /* host state machine violation */
447 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
448 AC_ERR_MEDIA = (1 << 3), /* media error */
449 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
450 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
451 AC_ERR_SYSTEM = (1 << 6), /* system error */
452 AC_ERR_INVALID = (1 << 7), /* invalid argument */
453 AC_ERR_OTHER = (1 << 8), /* unknown */
454 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
455 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
456 };
457
458 /*
459 * Link power management policy: If you alter this, you also need to
460 * alter libata-scsi.c (for the ascii descriptions)
461 */
462 enum ata_lpm_policy {
463 ATA_LPM_UNKNOWN,
464 ATA_LPM_MAX_POWER,
465 ATA_LPM_MED_POWER,
466 ATA_LPM_MED_POWER_WITH_DIPM, /* Med power + DIPM as win IRST does */
467 ATA_LPM_MIN_POWER_WITH_PARTIAL, /* Min Power + partial and slumber */
468 ATA_LPM_MIN_POWER, /* Min power + no partial (slumber only) */
469 };
470
471 enum ata_lpm_hints {
472 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
473 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
474 ATA_LPM_WAKE_ONLY = (1 << 2), /* only wake up link */
475 };
476
477 /* forward declarations */
478 struct scsi_device;
479 struct ata_port_operations;
480 struct ata_port;
481 struct ata_link;
482 struct ata_queued_cmd;
483
484 /* typedefs */
485 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
486 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
487 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
488 unsigned long deadline);
489 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
490
491 extern struct device_attribute dev_attr_unload_heads;
492 #ifdef CONFIG_SATA_HOST
493 extern struct device_attribute dev_attr_link_power_management_policy;
494 extern struct device_attribute dev_attr_ncq_prio_supported;
495 extern struct device_attribute dev_attr_ncq_prio_enable;
496 extern struct device_attribute dev_attr_em_message_type;
497 extern struct device_attribute dev_attr_em_message;
498 extern struct device_attribute dev_attr_sw_activity;
499 #endif
500
501 enum sw_activity {
502 OFF,
503 BLINK_ON,
504 BLINK_OFF,
505 };
506
507 struct ata_taskfile {
508 unsigned long flags; /* ATA_TFLAG_xxx */
509 u8 protocol; /* ATA_PROT_xxx */
510
511 u8 ctl; /* control reg */
512
513 u8 hob_feature; /* additional data */
514 u8 hob_nsect; /* to support LBA48 */
515 u8 hob_lbal;
516 u8 hob_lbam;
517 u8 hob_lbah;
518
519 union {
520 u8 error;
521 u8 feature;
522 };
523 u8 nsect;
524 u8 lbal;
525 u8 lbam;
526 u8 lbah;
527
528 u8 device;
529
530 union {
531 u8 status;
532 u8 command;
533 };
534
535 u32 auxiliary; /* auxiliary field */
536 /* from SATA 3.1 and */
537 /* ATA-8 ACS-3 */
538 };
539
540 #ifdef CONFIG_ATA_SFF
541 struct ata_ioports {
542 void __iomem *cmd_addr;
543 void __iomem *data_addr;
544 void __iomem *error_addr;
545 void __iomem *feature_addr;
546 void __iomem *nsect_addr;
547 void __iomem *lbal_addr;
548 void __iomem *lbam_addr;
549 void __iomem *lbah_addr;
550 void __iomem *device_addr;
551 void __iomem *status_addr;
552 void __iomem *command_addr;
553 void __iomem *altstatus_addr;
554 void __iomem *ctl_addr;
555 #ifdef CONFIG_ATA_BMDMA
556 void __iomem *bmdma_addr;
557 #endif /* CONFIG_ATA_BMDMA */
558 void __iomem *scr_addr;
559 };
560 #endif /* CONFIG_ATA_SFF */
561
562 struct ata_host {
563 spinlock_t lock;
564 struct device *dev;
565 void __iomem * const *iomap;
566 unsigned int n_ports;
567 unsigned int n_tags; /* nr of NCQ tags */
568 void *private_data;
569 struct ata_port_operations *ops;
570 unsigned long flags;
571 struct kref kref;
572
573 struct mutex eh_mutex;
574 struct task_struct *eh_owner;
575
576 struct ata_port *simplex_claimed; /* channel owning the DMA */
577 struct ata_port *ports[];
578 };
579
580 struct ata_queued_cmd {
581 struct ata_port *ap;
582 struct ata_device *dev;
583
584 struct scsi_cmnd *scsicmd;
585 void (*scsidone)(struct scsi_cmnd *);
586
587 struct ata_taskfile tf;
588 u8 cdb[ATAPI_CDB_LEN];
589
590 unsigned long flags; /* ATA_QCFLAG_xxx */
591 unsigned int tag; /* libata core tag */
592 unsigned int hw_tag; /* driver tag */
593 unsigned int n_elem;
594 unsigned int orig_n_elem;
595
596 int dma_dir;
597
598 unsigned int sect_size;
599
600 unsigned int nbytes;
601 unsigned int extrabytes;
602 unsigned int curbytes;
603
604 struct scatterlist sgent;
605
606 struct scatterlist *sg;
607
608 struct scatterlist *cursg;
609 unsigned int cursg_ofs;
610
611 unsigned int err_mask;
612 struct ata_taskfile result_tf;
613 ata_qc_cb_t complete_fn;
614
615 void *private_data;
616 void *lldd_task;
617 };
618
619 struct ata_port_stats {
620 unsigned long unhandled_irq;
621 unsigned long idle_irq;
622 unsigned long rw_reqbuf;
623 };
624
625 struct ata_ering_entry {
626 unsigned int eflags;
627 unsigned int err_mask;
628 u64 timestamp;
629 };
630
631 struct ata_ering {
632 int cursor;
633 struct ata_ering_entry ring[ATA_ERING_SIZE];
634 };
635
636 struct ata_cpr {
637 u8 num;
638 u8 num_storage_elements;
639 u64 start_lba;
640 u64 num_lbas;
641 };
642
643 struct ata_cpr_log {
644 u8 nr_cpr;
645 struct ata_cpr cpr[];
646 };
647
648 struct ata_device {
649 struct ata_link *link;
650 unsigned int devno; /* 0 or 1 */
651 unsigned int horkage; /* List of broken features */
652 unsigned long flags; /* ATA_DFLAG_xxx */
653 struct scsi_device *sdev; /* attached SCSI device */
654 void *private_data;
655 #ifdef CONFIG_ATA_ACPI
656 union acpi_object *gtf_cache;
657 unsigned int gtf_filter;
658 #endif
659 #ifdef CONFIG_SATA_ZPODD
660 void *zpodd;
661 #endif
662 struct device tdev;
663 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
664 u64 n_sectors; /* size of device, if ATA */
665 u64 n_native_sectors; /* native size, if ATA */
666 unsigned int class; /* ATA_DEV_xxx */
667 unsigned long unpark_deadline;
668
669 u8 pio_mode;
670 u8 dma_mode;
671 u8 xfer_mode;
672 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
673
674 unsigned int multi_count; /* sectors count for
675 READ/WRITE MULTIPLE */
676 unsigned int max_sectors; /* per-device max sectors */
677 unsigned int cdb_len;
678
679 /* per-dev xfer mask */
680 unsigned int pio_mask;
681 unsigned int mwdma_mask;
682 unsigned int udma_mask;
683
684 /* for CHS addressing */
685 u16 cylinders; /* Number of cylinders */
686 u16 heads; /* Number of heads */
687 u16 sectors; /* Number of sectors per track */
688
689 union {
690 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
691 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
692 } ____cacheline_aligned;
693
694 /* DEVSLP Timing Variables from Identify Device Data Log */
695 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE];
696
697 /* NCQ send and receive log subcommand support */
698 u8 ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE];
699 u8 ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_SIZE];
700
701 /* ZAC zone configuration */
702 u32 zac_zoned_cap;
703 u32 zac_zones_optimal_open;
704 u32 zac_zones_optimal_nonseq;
705 u32 zac_zones_max_open;
706
707 /* Concurrent positioning ranges */
708 struct ata_cpr_log *cpr_log;
709
710 /* error history */
711 int spdn_cnt;
712 /* ering is CLEAR_END, read comment above CLEAR_END */
713 struct ata_ering ering;
714 };
715
716 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
717 * cleared to zero on ata_dev_init().
718 */
719 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
720 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
721
722 struct ata_eh_info {
723 struct ata_device *dev; /* offending device */
724 u32 serror; /* SError from LLDD */
725 unsigned int err_mask; /* port-wide err_mask */
726 unsigned int action; /* ATA_EH_* action mask */
727 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
728 unsigned int flags; /* ATA_EHI_* flags */
729
730 unsigned int probe_mask;
731
732 char desc[ATA_EH_DESC_LEN];
733 int desc_len;
734 };
735
736 struct ata_eh_context {
737 struct ata_eh_info i;
738 int tries[ATA_MAX_DEVICES];
739 int cmd_timeout_idx[ATA_MAX_DEVICES]
740 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
741 unsigned int classes[ATA_MAX_DEVICES];
742 unsigned int did_probe_mask;
743 unsigned int unloaded_mask;
744 unsigned int saved_ncq_enabled;
745 u8 saved_xfer_mode[ATA_MAX_DEVICES];
746 /* timestamp for the last reset attempt or success */
747 unsigned long last_reset;
748 };
749
750 struct ata_acpi_drive
751 {
752 u32 pio;
753 u32 dma;
754 } __packed;
755
756 struct ata_acpi_gtm {
757 struct ata_acpi_drive drive[2];
758 u32 flags;
759 } __packed;
760
761 struct ata_link {
762 struct ata_port *ap;
763 int pmp; /* port multiplier port # */
764
765 struct device tdev;
766 unsigned int active_tag; /* active tag on this link */
767 u32 sactive; /* active NCQ commands */
768
769 unsigned int flags; /* ATA_LFLAG_xxx */
770
771 u32 saved_scontrol; /* SControl on probe */
772 unsigned int hw_sata_spd_limit;
773 unsigned int sata_spd_limit;
774 unsigned int sata_spd; /* current SATA PHY speed */
775 enum ata_lpm_policy lpm_policy;
776
777 /* record runtime error info, protected by host_set lock */
778 struct ata_eh_info eh_info;
779 /* EH context */
780 struct ata_eh_context eh_context;
781
782 struct ata_device device[ATA_MAX_DEVICES];
783
784 unsigned long last_lpm_change; /* when last LPM change happened */
785 };
786 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
787 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
788
789 struct ata_port {
790 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
791 struct ata_port_operations *ops;
792 spinlock_t *lock;
793 /* Flags owned by the EH context. Only EH should touch these once the
794 port is active */
795 unsigned long flags; /* ATA_FLAG_xxx */
796 /* Flags that change dynamically, protected by ap->lock */
797 unsigned int pflags; /* ATA_PFLAG_xxx */
798 unsigned int print_id; /* user visible unique port ID */
799 unsigned int local_port_no; /* host local port num */
800 unsigned int port_no; /* 0 based port no. inside the host */
801
802 #ifdef CONFIG_ATA_SFF
803 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
804 u8 ctl; /* cache of ATA control register */
805 u8 last_ctl; /* Cache last written value */
806 struct ata_link* sff_pio_task_link; /* link currently used */
807 struct delayed_work sff_pio_task;
808 #ifdef CONFIG_ATA_BMDMA
809 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
810 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
811 #endif /* CONFIG_ATA_BMDMA */
812 #endif /* CONFIG_ATA_SFF */
813
814 unsigned int pio_mask;
815 unsigned int mwdma_mask;
816 unsigned int udma_mask;
817 unsigned int cbl; /* cable type; ATA_CBL_xxx */
818
819 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE + 1];
820 u64 qc_active;
821 int nr_active_links; /* #links with active qcs */
822
823 struct ata_link link; /* host default link */
824 struct ata_link *slave_link; /* see ata_slave_link_init() */
825
826 int nr_pmp_links; /* nr of available PMP links */
827 struct ata_link *pmp_link; /* array of PMP links */
828 struct ata_link *excl_link; /* for PMP qc exclusion */
829
830 struct ata_port_stats stats;
831 struct ata_host *host;
832 struct device *dev;
833 struct device tdev;
834
835 struct mutex scsi_scan_mutex;
836 struct delayed_work hotplug_task;
837 struct work_struct scsi_rescan_task;
838
839 unsigned int hsm_task_state;
840
841 struct list_head eh_done_q;
842 wait_queue_head_t eh_wait_q;
843 int eh_tries;
844 struct completion park_req_pending;
845
846 pm_message_t pm_mesg;
847 enum ata_lpm_policy target_lpm_policy;
848
849 struct timer_list fastdrain_timer;
850 unsigned int fastdrain_cnt;
851
852 async_cookie_t cookie;
853
854 int em_message_type;
855 void *private_data;
856
857 #ifdef CONFIG_ATA_ACPI
858 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
859 #endif
860 /* owned by EH */
861 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
862 };
863
864 /* The following initializer overrides a method to NULL whether one of
865 * its parent has the method defined or not. This is equivalent to
866 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
867 * expression and thus can't be used as an initializer.
868 */
869 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
870
871 struct ata_port_operations {
872 /*
873 * Command execution
874 */
875 int (*qc_defer)(struct ata_queued_cmd *qc);
876 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
877 enum ata_completion_errors (*qc_prep)(struct ata_queued_cmd *qc);
878 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
879 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
880
881 /*
882 * Configuration and exception handling
883 */
884 int (*cable_detect)(struct ata_port *ap);
885 unsigned int (*mode_filter)(struct ata_device *dev, unsigned int xfer_mask);
886 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
887 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
888 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
889 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf,
890 __le16 *id);
891
892 void (*dev_config)(struct ata_device *dev);
893
894 void (*freeze)(struct ata_port *ap);
895 void (*thaw)(struct ata_port *ap);
896 ata_prereset_fn_t prereset;
897 ata_reset_fn_t softreset;
898 ata_reset_fn_t hardreset;
899 ata_postreset_fn_t postreset;
900 ata_prereset_fn_t pmp_prereset;
901 ata_reset_fn_t pmp_softreset;
902 ata_reset_fn_t pmp_hardreset;
903 ata_postreset_fn_t pmp_postreset;
904 void (*error_handler)(struct ata_port *ap);
905 void (*lost_interrupt)(struct ata_port *ap);
906 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
907 void (*sched_eh)(struct ata_port *ap);
908 void (*end_eh)(struct ata_port *ap);
909
910 /*
911 * Optional features
912 */
913 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
914 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
915 void (*pmp_attach)(struct ata_port *ap);
916 void (*pmp_detach)(struct ata_port *ap);
917 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
918 unsigned hints);
919
920 /*
921 * Start, stop, suspend and resume
922 */
923 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
924 int (*port_resume)(struct ata_port *ap);
925 int (*port_start)(struct ata_port *ap);
926 void (*port_stop)(struct ata_port *ap);
927 void (*host_stop)(struct ata_host *host);
928
929 #ifdef CONFIG_ATA_SFF
930 /*
931 * SFF / taskfile oriented ops
932 */
933 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
934 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
935 u8 (*sff_check_status)(struct ata_port *ap);
936 u8 (*sff_check_altstatus)(struct ata_port *ap);
937 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
938 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
939 void (*sff_exec_command)(struct ata_port *ap,
940 const struct ata_taskfile *tf);
941 unsigned int (*sff_data_xfer)(struct ata_queued_cmd *qc,
942 unsigned char *buf, unsigned int buflen, int rw);
943 void (*sff_irq_on)(struct ata_port *);
944 bool (*sff_irq_check)(struct ata_port *);
945 void (*sff_irq_clear)(struct ata_port *);
946 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
947
948 #ifdef CONFIG_ATA_BMDMA
949 void (*bmdma_setup)(struct ata_queued_cmd *qc);
950 void (*bmdma_start)(struct ata_queued_cmd *qc);
951 void (*bmdma_stop)(struct ata_queued_cmd *qc);
952 u8 (*bmdma_status)(struct ata_port *ap);
953 #endif /* CONFIG_ATA_BMDMA */
954 #endif /* CONFIG_ATA_SFF */
955
956 ssize_t (*em_show)(struct ata_port *ap, char *buf);
957 ssize_t (*em_store)(struct ata_port *ap, const char *message,
958 size_t size);
959 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
960 ssize_t (*sw_activity_store)(struct ata_device *dev,
961 enum sw_activity val);
962 ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state,
963 ssize_t size);
964
965 /*
966 * Obsolete
967 */
968 void (*phy_reset)(struct ata_port *ap);
969 void (*eng_timeout)(struct ata_port *ap);
970
971 /*
972 * ->inherits must be the last field and all the preceding
973 * fields must be pointers.
974 */
975 const struct ata_port_operations *inherits;
976 };
977
978 struct ata_port_info {
979 unsigned long flags;
980 unsigned long link_flags;
981 unsigned int pio_mask;
982 unsigned int mwdma_mask;
983 unsigned int udma_mask;
984 struct ata_port_operations *port_ops;
985 void *private_data;
986 };
987
988 struct ata_timing {
989 unsigned short mode; /* ATA mode */
990 unsigned short setup; /* t1 */
991 unsigned short act8b; /* t2 for 8-bit I/O */
992 unsigned short rec8b; /* t2i for 8-bit I/O */
993 unsigned short cyc8b; /* t0 for 8-bit I/O */
994 unsigned short active; /* t2 or tD */
995 unsigned short recover; /* t2i or tK */
996 unsigned short dmack_hold; /* tj */
997 unsigned short cycle; /* t0 */
998 unsigned short udma; /* t2CYCTYP/2 */
999 };
1000
1001 /*
1002 * Core layer - drivers/ata/libata-core.c
1003 */
1004 extern struct ata_port_operations ata_dummy_port_ops;
1005 extern const struct ata_port_info ata_dummy_port_info;
1006
ata_is_atapi(u8 prot)1007 static inline bool ata_is_atapi(u8 prot)
1008 {
1009 return prot & ATA_PROT_FLAG_ATAPI;
1010 }
1011
ata_is_pio(u8 prot)1012 static inline bool ata_is_pio(u8 prot)
1013 {
1014 return prot & ATA_PROT_FLAG_PIO;
1015 }
1016
ata_is_dma(u8 prot)1017 static inline bool ata_is_dma(u8 prot)
1018 {
1019 return prot & ATA_PROT_FLAG_DMA;
1020 }
1021
ata_is_ncq(u8 prot)1022 static inline bool ata_is_ncq(u8 prot)
1023 {
1024 return prot & ATA_PROT_FLAG_NCQ;
1025 }
1026
ata_is_data(u8 prot)1027 static inline bool ata_is_data(u8 prot)
1028 {
1029 return prot & (ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA);
1030 }
1031
is_multi_taskfile(struct ata_taskfile * tf)1032 static inline int is_multi_taskfile(struct ata_taskfile *tf)
1033 {
1034 return (tf->command == ATA_CMD_READ_MULTI) ||
1035 (tf->command == ATA_CMD_WRITE_MULTI) ||
1036 (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1037 (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1038 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1039 }
1040
ata_port_is_dummy(struct ata_port * ap)1041 static inline int ata_port_is_dummy(struct ata_port *ap)
1042 {
1043 return ap->ops == &ata_dummy_port_ops;
1044 }
1045
1046 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
1047 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
1048 int (*check_ready)(struct ata_link *link));
1049 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
1050 unsigned long deadline);
1051 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1052
1053 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
1054 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
1055 const struct ata_port_info * const * ppi, int n_ports);
1056 extern void ata_host_get(struct ata_host *host);
1057 extern void ata_host_put(struct ata_host *host);
1058 extern int ata_host_start(struct ata_host *host);
1059 extern int ata_host_register(struct ata_host *host,
1060 struct scsi_host_template *sht);
1061 extern int ata_host_activate(struct ata_host *host, int irq,
1062 irq_handler_t irq_handler, unsigned long irq_flags,
1063 struct scsi_host_template *sht);
1064 extern void ata_host_detach(struct ata_host *host);
1065 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
1066 extern int ata_scsi_detect(struct scsi_host_template *sht);
1067 extern int ata_scsi_ioctl(struct scsi_device *dev, unsigned int cmd,
1068 void __user *arg);
1069 #ifdef CONFIG_COMPAT
1070 #define ATA_SCSI_COMPAT_IOCTL .compat_ioctl = ata_scsi_ioctl,
1071 #else
1072 #define ATA_SCSI_COMPAT_IOCTL /* empty */
1073 #endif
1074 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1075 #if IS_REACHABLE(CONFIG_ATA)
1076 bool ata_scsi_dma_need_drain(struct request *rq);
1077 #else
1078 #define ata_scsi_dma_need_drain NULL
1079 #endif
1080 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1081 unsigned int cmd, void __user *arg);
1082 extern bool ata_link_online(struct ata_link *link);
1083 extern bool ata_link_offline(struct ata_link *link);
1084 #ifdef CONFIG_PM
1085 extern void ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1086 extern void ata_host_resume(struct ata_host *host);
1087 extern void ata_sas_port_suspend(struct ata_port *ap);
1088 extern void ata_sas_port_resume(struct ata_port *ap);
1089 #else
ata_sas_port_suspend(struct ata_port * ap)1090 static inline void ata_sas_port_suspend(struct ata_port *ap)
1091 {
1092 }
ata_sas_port_resume(struct ata_port * ap)1093 static inline void ata_sas_port_resume(struct ata_port *ap)
1094 {
1095 }
1096 #endif
1097 extern int ata_ratelimit(void);
1098 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1099 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1100 u32 val, unsigned long interval, unsigned long timeout);
1101 extern int atapi_cmd_type(u8 opcode);
1102 extern unsigned int ata_pack_xfermask(unsigned int pio_mask,
1103 unsigned int mwdma_mask,
1104 unsigned int udma_mask);
1105 extern void ata_unpack_xfermask(unsigned int xfer_mask,
1106 unsigned int *pio_mask,
1107 unsigned int *mwdma_mask,
1108 unsigned int *udma_mask);
1109 extern u8 ata_xfer_mask2mode(unsigned int xfer_mask);
1110 extern unsigned int ata_xfer_mode2mask(u8 xfer_mode);
1111 extern int ata_xfer_mode2shift(u8 xfer_mode);
1112 extern const char *ata_mode_string(unsigned int xfer_mask);
1113 extern unsigned int ata_id_xfermask(const u16 *id);
1114 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1115 extern enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc);
1116 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1117 unsigned int n_elem);
1118 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1119 extern unsigned int ata_port_classify(struct ata_port *ap,
1120 const struct ata_taskfile *tf);
1121 extern void ata_dev_disable(struct ata_device *adev);
1122 extern void ata_id_string(const u16 *id, unsigned char *s,
1123 unsigned int ofs, unsigned int len);
1124 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1125 unsigned int ofs, unsigned int len);
1126 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1127 struct ata_taskfile *tf, __le16 *id);
1128 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1129 extern u64 ata_qc_get_active(struct ata_port *ap);
1130 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1131 extern int ata_std_bios_param(struct scsi_device *sdev,
1132 struct block_device *bdev,
1133 sector_t capacity, int geom[]);
1134 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1135 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1136 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1137 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1138 int queue_depth);
1139 extern int ata_change_queue_depth(struct ata_port *ap, struct ata_device *dev,
1140 struct scsi_device *sdev, int queue_depth);
1141 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1142 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1143 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1144 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1145
1146 /*
1147 * SATA specific code - drivers/ata/libata-sata.c
1148 */
1149 #ifdef CONFIG_SATA_HOST
1150 extern const unsigned long sata_deb_timing_normal[];
1151 extern const unsigned long sata_deb_timing_hotplug[];
1152 extern const unsigned long sata_deb_timing_long[];
1153
1154 static inline const unsigned long *
sata_ehc_deb_timing(struct ata_eh_context * ehc)1155 sata_ehc_deb_timing(struct ata_eh_context *ehc)
1156 {
1157 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
1158 return sata_deb_timing_hotplug;
1159 else
1160 return sata_deb_timing_normal;
1161 }
1162
1163 extern int sata_scr_valid(struct ata_link *link);
1164 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1165 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1166 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1167 extern int sata_set_spd(struct ata_link *link);
1168 extern int sata_link_hardreset(struct ata_link *link,
1169 const unsigned long *timing, unsigned long deadline,
1170 bool *online, int (*check_ready)(struct ata_link *));
1171 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
1172 unsigned long deadline);
1173 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1174 #else
1175 static inline const unsigned long *
sata_ehc_deb_timing(struct ata_eh_context * ehc)1176 sata_ehc_deb_timing(struct ata_eh_context *ehc)
1177 {
1178 return NULL;
1179 }
sata_scr_valid(struct ata_link * link)1180 static inline int sata_scr_valid(struct ata_link *link) { return 0; }
sata_scr_read(struct ata_link * link,int reg,u32 * val)1181 static inline int sata_scr_read(struct ata_link *link, int reg, u32 *val)
1182 {
1183 return -EOPNOTSUPP;
1184 }
sata_scr_write(struct ata_link * link,int reg,u32 val)1185 static inline int sata_scr_write(struct ata_link *link, int reg, u32 val)
1186 {
1187 return -EOPNOTSUPP;
1188 }
sata_scr_write_flush(struct ata_link * link,int reg,u32 val)1189 static inline int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
1190 {
1191 return -EOPNOTSUPP;
1192 }
sata_set_spd(struct ata_link * link)1193 static inline int sata_set_spd(struct ata_link *link) { return -EOPNOTSUPP; }
sata_link_hardreset(struct ata_link * link,const unsigned long * timing,unsigned long deadline,bool * online,int (* check_ready)(struct ata_link *))1194 static inline int sata_link_hardreset(struct ata_link *link,
1195 const unsigned long *timing,
1196 unsigned long deadline,
1197 bool *online,
1198 int (*check_ready)(struct ata_link *))
1199 {
1200 if (online)
1201 *online = false;
1202 return -EOPNOTSUPP;
1203 }
sata_link_resume(struct ata_link * link,const unsigned long * params,unsigned long deadline)1204 static inline int sata_link_resume(struct ata_link *link,
1205 const unsigned long *params,
1206 unsigned long deadline)
1207 {
1208 return -EOPNOTSUPP;
1209 }
ata_eh_analyze_ncq_error(struct ata_link * link)1210 static inline void ata_eh_analyze_ncq_error(struct ata_link *link) { }
1211 #endif
1212 extern int sata_link_debounce(struct ata_link *link,
1213 const unsigned long *params, unsigned long deadline);
1214 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
1215 bool spm_wakeup);
1216 extern int ata_slave_link_init(struct ata_port *ap);
1217 extern void ata_sas_port_destroy(struct ata_port *);
1218 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1219 struct ata_port_info *, struct Scsi_Host *);
1220 extern void ata_sas_async_probe(struct ata_port *ap);
1221 extern int ata_sas_sync_probe(struct ata_port *ap);
1222 extern int ata_sas_port_init(struct ata_port *);
1223 extern int ata_sas_port_start(struct ata_port *ap);
1224 extern int ata_sas_tport_add(struct device *parent, struct ata_port *ap);
1225 extern void ata_sas_tport_delete(struct ata_port *ap);
1226 extern void ata_sas_port_stop(struct ata_port *ap);
1227 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1228 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1229 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1230 u8 pmp, int is_cmd, u8 *fis);
1231 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1232 extern int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active);
1233 extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
1234 extern int sata_async_notification(struct ata_port *ap);
1235
1236 extern int ata_cable_40wire(struct ata_port *ap);
1237 extern int ata_cable_80wire(struct ata_port *ap);
1238 extern int ata_cable_sata(struct ata_port *ap);
1239 extern int ata_cable_ignore(struct ata_port *ap);
1240 extern int ata_cable_unknown(struct ata_port *ap);
1241
1242 /* Timing helpers */
1243 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1244 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1245
1246 /* PCI */
1247 #ifdef CONFIG_PCI
1248 struct pci_dev;
1249
1250 struct pci_bits {
1251 unsigned int reg; /* PCI config register to read */
1252 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1253 unsigned long mask;
1254 unsigned long val;
1255 };
1256
1257 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1258 extern void ata_pci_shutdown_one(struct pci_dev *pdev);
1259 extern void ata_pci_remove_one(struct pci_dev *pdev);
1260
1261 #ifdef CONFIG_PM
1262 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1263 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1264 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1265 extern int ata_pci_device_resume(struct pci_dev *pdev);
1266 #endif /* CONFIG_PM */
1267 #endif /* CONFIG_PCI */
1268
1269 struct platform_device;
1270
1271 extern int ata_platform_remove_one(struct platform_device *pdev);
1272
1273 /*
1274 * ACPI - drivers/ata/libata-acpi.c
1275 */
1276 #ifdef CONFIG_ATA_ACPI
ata_acpi_init_gtm(struct ata_port * ap)1277 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1278 {
1279 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1280 return &ap->__acpi_init_gtm;
1281 return NULL;
1282 }
1283 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1284 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1285 unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1286 const struct ata_acpi_gtm *gtm);
1287 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1288 #else
ata_acpi_init_gtm(struct ata_port * ap)1289 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1290 {
1291 return NULL;
1292 }
1293
ata_acpi_stm(const struct ata_port * ap,struct ata_acpi_gtm * stm)1294 static inline int ata_acpi_stm(const struct ata_port *ap,
1295 struct ata_acpi_gtm *stm)
1296 {
1297 return -ENOSYS;
1298 }
1299
ata_acpi_gtm(const struct ata_port * ap,struct ata_acpi_gtm * stm)1300 static inline int ata_acpi_gtm(const struct ata_port *ap,
1301 struct ata_acpi_gtm *stm)
1302 {
1303 return -ENOSYS;
1304 }
1305
ata_acpi_gtm_xfermask(struct ata_device * dev,const struct ata_acpi_gtm * gtm)1306 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1307 const struct ata_acpi_gtm *gtm)
1308 {
1309 return 0;
1310 }
1311
ata_acpi_cbl_80wire(struct ata_port * ap,const struct ata_acpi_gtm * gtm)1312 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1313 const struct ata_acpi_gtm *gtm)
1314 {
1315 return 0;
1316 }
1317 #endif
1318
1319 /*
1320 * EH - drivers/ata/libata-eh.c
1321 */
1322 extern void ata_port_schedule_eh(struct ata_port *ap);
1323 extern void ata_port_wait_eh(struct ata_port *ap);
1324 extern int ata_link_abort(struct ata_link *link);
1325 extern int ata_port_abort(struct ata_port *ap);
1326 extern int ata_port_freeze(struct ata_port *ap);
1327
1328 extern void ata_eh_freeze_port(struct ata_port *ap);
1329 extern void ata_eh_thaw_port(struct ata_port *ap);
1330
1331 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1332 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1333
1334 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1335 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1336 ata_postreset_fn_t postreset);
1337 extern void ata_std_error_handler(struct ata_port *ap);
1338 extern void ata_std_sched_eh(struct ata_port *ap);
1339 extern void ata_std_end_eh(struct ata_port *ap);
1340 extern int ata_link_nr_enabled(struct ata_link *link);
1341
1342 /*
1343 * Base operations to inherit from and initializers for sht
1344 *
1345 * Operations
1346 *
1347 * base : Common to all libata drivers.
1348 * sata : SATA controllers w/ native interface.
1349 * pmp : SATA controllers w/ PMP support.
1350 * sff : SFF ATA controllers w/o BMDMA support.
1351 * bmdma : SFF ATA controllers w/ BMDMA support.
1352 *
1353 * sht initializers
1354 *
1355 * BASE : Common to all libata drivers. The user must set
1356 * sg_tablesize and dma_boundary.
1357 * PIO : SFF ATA controllers w/ only PIO support.
1358 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1359 * dma_boundary are set to BMDMA limits.
1360 * NCQ : SATA controllers supporting NCQ. The user must set
1361 * sg_tablesize, dma_boundary and can_queue.
1362 */
1363 extern const struct ata_port_operations ata_base_port_ops;
1364 extern const struct ata_port_operations sata_port_ops;
1365 extern const struct attribute_group *ata_common_sdev_groups[];
1366
1367 /*
1368 * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
1369 * by the edge drivers. Because the 'module' field of sht must be the
1370 * edge driver's module reference, otherwise the driver can be unloaded
1371 * even if the scsi_device is being accessed.
1372 */
1373 #define __ATA_BASE_SHT(drv_name) \
1374 .module = THIS_MODULE, \
1375 .name = drv_name, \
1376 .ioctl = ata_scsi_ioctl, \
1377 ATA_SCSI_COMPAT_IOCTL \
1378 .queuecommand = ata_scsi_queuecmd, \
1379 .dma_need_drain = ata_scsi_dma_need_drain, \
1380 .this_id = ATA_SHT_THIS_ID, \
1381 .emulated = ATA_SHT_EMULATED, \
1382 .proc_name = drv_name, \
1383 .slave_destroy = ata_scsi_slave_destroy, \
1384 .bios_param = ata_std_bios_param, \
1385 .unlock_native_capacity = ata_scsi_unlock_native_capacity,\
1386 .max_sectors = ATA_MAX_SECTORS_LBA48
1387
1388 #define ATA_SUBBASE_SHT(drv_name) \
1389 __ATA_BASE_SHT(drv_name), \
1390 .can_queue = ATA_DEF_QUEUE, \
1391 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \
1392 .slave_configure = ata_scsi_slave_config
1393
1394 #define ATA_SUBBASE_SHT_QD(drv_name, drv_qd) \
1395 __ATA_BASE_SHT(drv_name), \
1396 .can_queue = drv_qd, \
1397 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \
1398 .slave_configure = ata_scsi_slave_config
1399
1400 #define ATA_BASE_SHT(drv_name) \
1401 ATA_SUBBASE_SHT(drv_name), \
1402 .sdev_groups = ata_common_sdev_groups
1403
1404 #ifdef CONFIG_SATA_HOST
1405 extern const struct attribute_group *ata_ncq_sdev_groups[];
1406
1407 #define ATA_NCQ_SHT(drv_name) \
1408 ATA_SUBBASE_SHT(drv_name), \
1409 .sdev_groups = ata_ncq_sdev_groups, \
1410 .change_queue_depth = ata_scsi_change_queue_depth
1411
1412 #define ATA_NCQ_SHT_QD(drv_name, drv_qd) \
1413 ATA_SUBBASE_SHT_QD(drv_name, drv_qd), \
1414 .sdev_groups = ata_ncq_sdev_groups, \
1415 .change_queue_depth = ata_scsi_change_queue_depth
1416 #endif
1417
1418 /*
1419 * PMP helpers
1420 */
1421 #ifdef CONFIG_SATA_PMP
sata_pmp_supported(struct ata_port * ap)1422 static inline bool sata_pmp_supported(struct ata_port *ap)
1423 {
1424 return ap->flags & ATA_FLAG_PMP;
1425 }
1426
sata_pmp_attached(struct ata_port * ap)1427 static inline bool sata_pmp_attached(struct ata_port *ap)
1428 {
1429 return ap->nr_pmp_links != 0;
1430 }
1431
ata_is_host_link(const struct ata_link * link)1432 static inline bool ata_is_host_link(const struct ata_link *link)
1433 {
1434 return link == &link->ap->link || link == link->ap->slave_link;
1435 }
1436 #else /* CONFIG_SATA_PMP */
sata_pmp_supported(struct ata_port * ap)1437 static inline bool sata_pmp_supported(struct ata_port *ap)
1438 {
1439 return false;
1440 }
1441
sata_pmp_attached(struct ata_port * ap)1442 static inline bool sata_pmp_attached(struct ata_port *ap)
1443 {
1444 return false;
1445 }
1446
ata_is_host_link(const struct ata_link * link)1447 static inline bool ata_is_host_link(const struct ata_link *link)
1448 {
1449 return true;
1450 }
1451 #endif /* CONFIG_SATA_PMP */
1452
sata_srst_pmp(struct ata_link * link)1453 static inline int sata_srst_pmp(struct ata_link *link)
1454 {
1455 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1456 return SATA_PMP_CTRL_PORT;
1457 return link->pmp;
1458 }
1459
1460 #define ata_port_printk(level, ap, fmt, ...) \
1461 pr_ ## level ("ata%u: " fmt, (ap)->print_id, ##__VA_ARGS__)
1462
1463 #define ata_port_err(ap, fmt, ...) \
1464 ata_port_printk(err, ap, fmt, ##__VA_ARGS__)
1465 #define ata_port_warn(ap, fmt, ...) \
1466 ata_port_printk(warn, ap, fmt, ##__VA_ARGS__)
1467 #define ata_port_notice(ap, fmt, ...) \
1468 ata_port_printk(notice, ap, fmt, ##__VA_ARGS__)
1469 #define ata_port_info(ap, fmt, ...) \
1470 ata_port_printk(info, ap, fmt, ##__VA_ARGS__)
1471 #define ata_port_dbg(ap, fmt, ...) \
1472 ata_port_printk(debug, ap, fmt, ##__VA_ARGS__)
1473
1474 #define ata_link_printk(level, link, fmt, ...) \
1475 do { \
1476 if (sata_pmp_attached((link)->ap) || \
1477 (link)->ap->slave_link) \
1478 pr_ ## level ("ata%u.%02u: " fmt, \
1479 (link)->ap->print_id, \
1480 (link)->pmp, \
1481 ##__VA_ARGS__); \
1482 else \
1483 pr_ ## level ("ata%u: " fmt, \
1484 (link)->ap->print_id, \
1485 ##__VA_ARGS__); \
1486 } while (0)
1487
1488 #define ata_link_err(link, fmt, ...) \
1489 ata_link_printk(err, link, fmt, ##__VA_ARGS__)
1490 #define ata_link_warn(link, fmt, ...) \
1491 ata_link_printk(warn, link, fmt, ##__VA_ARGS__)
1492 #define ata_link_notice(link, fmt, ...) \
1493 ata_link_printk(notice, link, fmt, ##__VA_ARGS__)
1494 #define ata_link_info(link, fmt, ...) \
1495 ata_link_printk(info, link, fmt, ##__VA_ARGS__)
1496 #define ata_link_dbg(link, fmt, ...) \
1497 ata_link_printk(debug, link, fmt, ##__VA_ARGS__)
1498
1499 #define ata_dev_printk(level, dev, fmt, ...) \
1500 pr_ ## level("ata%u.%02u: " fmt, \
1501 (dev)->link->ap->print_id, \
1502 (dev)->link->pmp + (dev)->devno, \
1503 ##__VA_ARGS__)
1504
1505 #define ata_dev_err(dev, fmt, ...) \
1506 ata_dev_printk(err, dev, fmt, ##__VA_ARGS__)
1507 #define ata_dev_warn(dev, fmt, ...) \
1508 ata_dev_printk(warn, dev, fmt, ##__VA_ARGS__)
1509 #define ata_dev_notice(dev, fmt, ...) \
1510 ata_dev_printk(notice, dev, fmt, ##__VA_ARGS__)
1511 #define ata_dev_info(dev, fmt, ...) \
1512 ata_dev_printk(info, dev, fmt, ##__VA_ARGS__)
1513 #define ata_dev_dbg(dev, fmt, ...) \
1514 ata_dev_printk(debug, dev, fmt, ##__VA_ARGS__)
1515
1516 void ata_print_version(const struct device *dev, const char *version);
1517
1518 /*
1519 * ata_eh_info helpers
1520 */
1521 extern __printf(2, 3)
1522 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1523 extern __printf(2, 3)
1524 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1525 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1526
ata_ehi_hotplugged(struct ata_eh_info * ehi)1527 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1528 {
1529 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1530 ehi->flags |= ATA_EHI_HOTPLUGGED;
1531 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1532 ehi->err_mask |= AC_ERR_ATA_BUS;
1533 }
1534
1535 /*
1536 * port description helpers
1537 */
1538 extern __printf(2, 3)
1539 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1540 #ifdef CONFIG_PCI
1541 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1542 const char *name);
1543 #endif
1544
ata_tag_internal(unsigned int tag)1545 static inline bool ata_tag_internal(unsigned int tag)
1546 {
1547 return tag == ATA_TAG_INTERNAL;
1548 }
1549
ata_tag_valid(unsigned int tag)1550 static inline bool ata_tag_valid(unsigned int tag)
1551 {
1552 return tag < ATA_MAX_QUEUE || ata_tag_internal(tag);
1553 }
1554
1555 #define __ata_qc_for_each(ap, qc, tag, max_tag, fn) \
1556 for ((tag) = 0; (tag) < (max_tag) && \
1557 ({ qc = fn((ap), (tag)); 1; }); (tag)++) \
1558
1559 /*
1560 * Internal use only, iterate commands ignoring error handling and
1561 * status of 'qc'.
1562 */
1563 #define ata_qc_for_each_raw(ap, qc, tag) \
1564 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, __ata_qc_from_tag)
1565
1566 /*
1567 * Iterate all potential commands that can be queued
1568 */
1569 #define ata_qc_for_each(ap, qc, tag) \
1570 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, ata_qc_from_tag)
1571
1572 /*
1573 * Like ata_qc_for_each, but with the internal tag included
1574 */
1575 #define ata_qc_for_each_with_internal(ap, qc, tag) \
1576 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE + 1, ata_qc_from_tag)
1577
1578 /*
1579 * device helpers
1580 */
ata_class_enabled(unsigned int class)1581 static inline unsigned int ata_class_enabled(unsigned int class)
1582 {
1583 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1584 class == ATA_DEV_PMP || class == ATA_DEV_SEMB ||
1585 class == ATA_DEV_ZAC;
1586 }
1587
ata_class_disabled(unsigned int class)1588 static inline unsigned int ata_class_disabled(unsigned int class)
1589 {
1590 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1591 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP ||
1592 class == ATA_DEV_ZAC_UNSUP;
1593 }
1594
ata_class_absent(unsigned int class)1595 static inline unsigned int ata_class_absent(unsigned int class)
1596 {
1597 return !ata_class_enabled(class) && !ata_class_disabled(class);
1598 }
1599
ata_dev_enabled(const struct ata_device * dev)1600 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1601 {
1602 return ata_class_enabled(dev->class);
1603 }
1604
ata_dev_disabled(const struct ata_device * dev)1605 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1606 {
1607 return ata_class_disabled(dev->class);
1608 }
1609
ata_dev_absent(const struct ata_device * dev)1610 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1611 {
1612 return ata_class_absent(dev->class);
1613 }
1614
1615 /*
1616 * link helpers
1617 */
ata_link_max_devices(const struct ata_link * link)1618 static inline int ata_link_max_devices(const struct ata_link *link)
1619 {
1620 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1621 return 2;
1622 return 1;
1623 }
1624
ata_link_active(struct ata_link * link)1625 static inline int ata_link_active(struct ata_link *link)
1626 {
1627 return ata_tag_valid(link->active_tag) || link->sactive;
1628 }
1629
1630 /*
1631 * Iterators
1632 *
1633 * ATA_LITER_* constants are used to select link iteration mode and
1634 * ATA_DITER_* device iteration mode.
1635 *
1636 * For a custom iteration directly using ata_{link|dev}_next(), if
1637 * @link or @dev, respectively, is NULL, the first element is
1638 * returned. @dev and @link can be any valid device or link and the
1639 * next element according to the iteration mode will be returned.
1640 * After the last element, NULL is returned.
1641 */
1642 enum ata_link_iter_mode {
1643 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1644 * host link. no slave link */
1645 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1646 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1647 * slave link still comes after host link */
1648 };
1649
1650 enum ata_dev_iter_mode {
1651 ATA_DITER_ENABLED,
1652 ATA_DITER_ENABLED_REVERSE,
1653 ATA_DITER_ALL,
1654 ATA_DITER_ALL_REVERSE,
1655 };
1656
1657 extern struct ata_link *ata_link_next(struct ata_link *link,
1658 struct ata_port *ap,
1659 enum ata_link_iter_mode mode);
1660
1661 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1662 struct ata_link *link,
1663 enum ata_dev_iter_mode mode);
1664
1665 /*
1666 * Shortcut notation for iterations
1667 *
1668 * ata_for_each_link() iterates over each link of @ap according to
1669 * @mode. @link points to the current link in the loop. @link is
1670 * NULL after loop termination. ata_for_each_dev() works the same way
1671 * except that it iterates over each device of @link.
1672 *
1673 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1674 * specified when using the following shorthand notations. Only the
1675 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1676 * specified. This not only increases brevity but also makes it
1677 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1678 */
1679 #define ata_for_each_link(link, ap, mode) \
1680 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1681 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1682
1683 #define ata_for_each_dev(dev, link, mode) \
1684 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1685 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1686
1687 /**
1688 * ata_ncq_enabled - Test whether NCQ is enabled
1689 * @dev: ATA device to test for
1690 *
1691 * LOCKING:
1692 * spin_lock_irqsave(host lock)
1693 *
1694 * RETURNS:
1695 * 1 if NCQ is enabled for @dev, 0 otherwise.
1696 */
ata_ncq_enabled(struct ata_device * dev)1697 static inline int ata_ncq_enabled(struct ata_device *dev)
1698 {
1699 if (!IS_ENABLED(CONFIG_SATA_HOST))
1700 return 0;
1701 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1702 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1703 }
1704
ata_fpdma_dsm_supported(struct ata_device * dev)1705 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev)
1706 {
1707 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1708 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &
1709 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM);
1710 }
1711
ata_fpdma_read_log_supported(struct ata_device * dev)1712 static inline bool ata_fpdma_read_log_supported(struct ata_device *dev)
1713 {
1714 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1715 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET] &
1716 ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED);
1717 }
1718
ata_fpdma_zac_mgmt_in_supported(struct ata_device * dev)1719 static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev)
1720 {
1721 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1722 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] &
1723 ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED);
1724 }
1725
ata_fpdma_zac_mgmt_out_supported(struct ata_device * dev)1726 static inline bool ata_fpdma_zac_mgmt_out_supported(struct ata_device *dev)
1727 {
1728 return (dev->ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OFFSET] &
1729 ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OUT);
1730 }
1731
ata_qc_set_polling(struct ata_queued_cmd * qc)1732 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1733 {
1734 qc->tf.ctl |= ATA_NIEN;
1735 }
1736
__ata_qc_from_tag(struct ata_port * ap,unsigned int tag)1737 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1738 unsigned int tag)
1739 {
1740 if (ata_tag_valid(tag))
1741 return &ap->qcmd[tag];
1742 return NULL;
1743 }
1744
ata_qc_from_tag(struct ata_port * ap,unsigned int tag)1745 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1746 unsigned int tag)
1747 {
1748 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1749
1750 if (unlikely(!qc) || !ap->ops->error_handler)
1751 return qc;
1752
1753 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1754 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1755 return qc;
1756
1757 return NULL;
1758 }
1759
ata_qc_raw_nbytes(struct ata_queued_cmd * qc)1760 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1761 {
1762 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1763 }
1764
ata_tf_init(struct ata_device * dev,struct ata_taskfile * tf)1765 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1766 {
1767 memset(tf, 0, sizeof(*tf));
1768
1769 #ifdef CONFIG_ATA_SFF
1770 tf->ctl = dev->link->ap->ctl;
1771 #else
1772 tf->ctl = ATA_DEVCTL_OBS;
1773 #endif
1774 if (dev->devno == 0)
1775 tf->device = ATA_DEVICE_OBS;
1776 else
1777 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1778 }
1779
ata_qc_reinit(struct ata_queued_cmd * qc)1780 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1781 {
1782 qc->dma_dir = DMA_NONE;
1783 qc->sg = NULL;
1784 qc->flags = 0;
1785 qc->cursg = NULL;
1786 qc->cursg_ofs = 0;
1787 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1788 qc->n_elem = 0;
1789 qc->err_mask = 0;
1790 qc->sect_size = ATA_SECT_SIZE;
1791
1792 ata_tf_init(qc->dev, &qc->tf);
1793
1794 /* init result_tf such that it indicates normal completion */
1795 qc->result_tf.command = ATA_DRDY;
1796 qc->result_tf.feature = 0;
1797 }
1798
ata_try_flush_cache(const struct ata_device * dev)1799 static inline int ata_try_flush_cache(const struct ata_device *dev)
1800 {
1801 return ata_id_wcache_enabled(dev->id) ||
1802 ata_id_has_flush(dev->id) ||
1803 ata_id_has_flush_ext(dev->id);
1804 }
1805
ac_err_mask(u8 status)1806 static inline unsigned int ac_err_mask(u8 status)
1807 {
1808 if (status & (ATA_BUSY | ATA_DRQ))
1809 return AC_ERR_HSM;
1810 if (status & (ATA_ERR | ATA_DF))
1811 return AC_ERR_DEV;
1812 return 0;
1813 }
1814
__ac_err_mask(u8 status)1815 static inline unsigned int __ac_err_mask(u8 status)
1816 {
1817 unsigned int mask = ac_err_mask(status);
1818 if (mask == 0)
1819 return AC_ERR_OTHER;
1820 return mask;
1821 }
1822
ata_shost_to_port(struct Scsi_Host * host)1823 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1824 {
1825 return *(struct ata_port **)&host->hostdata[0];
1826 }
1827
ata_check_ready(u8 status)1828 static inline int ata_check_ready(u8 status)
1829 {
1830 if (!(status & ATA_BUSY))
1831 return 1;
1832
1833 /* 0xff indicates either no device or device not ready */
1834 if (status == 0xff)
1835 return -ENODEV;
1836
1837 return 0;
1838 }
1839
ata_deadline(unsigned long from_jiffies,unsigned long timeout_msecs)1840 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1841 unsigned long timeout_msecs)
1842 {
1843 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1844 }
1845
1846 /* Don't open code these in drivers as there are traps. Firstly the range may
1847 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1848 > UDMA_0. Dyma ddreigiau */
1849
ata_using_mwdma(struct ata_device * adev)1850 static inline int ata_using_mwdma(struct ata_device *adev)
1851 {
1852 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1853 return 1;
1854 return 0;
1855 }
1856
ata_using_udma(struct ata_device * adev)1857 static inline int ata_using_udma(struct ata_device *adev)
1858 {
1859 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1860 return 1;
1861 return 0;
1862 }
1863
ata_dma_enabled(struct ata_device * adev)1864 static inline int ata_dma_enabled(struct ata_device *adev)
1865 {
1866 return (adev->dma_mode == 0xFF ? 0 : 1);
1867 }
1868
1869 /**************************************************************************
1870 * PATA timings - drivers/ata/libata-pata-timings.c
1871 */
1872 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1873 extern int ata_timing_compute(struct ata_device *, unsigned short,
1874 struct ata_timing *, int, int);
1875 extern void ata_timing_merge(const struct ata_timing *,
1876 const struct ata_timing *, struct ata_timing *,
1877 unsigned int);
1878
1879 /**************************************************************************
1880 * PMP - drivers/ata/libata-pmp.c
1881 */
1882 #ifdef CONFIG_SATA_PMP
1883
1884 extern const struct ata_port_operations sata_pmp_port_ops;
1885
1886 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1887 extern void sata_pmp_error_handler(struct ata_port *ap);
1888
1889 #else /* CONFIG_SATA_PMP */
1890
1891 #define sata_pmp_port_ops sata_port_ops
1892 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1893 #define sata_pmp_error_handler ata_std_error_handler
1894
1895 #endif /* CONFIG_SATA_PMP */
1896
1897
1898 /**************************************************************************
1899 * SFF - drivers/ata/libata-sff.c
1900 */
1901 #ifdef CONFIG_ATA_SFF
1902
1903 extern const struct ata_port_operations ata_sff_port_ops;
1904 extern const struct ata_port_operations ata_bmdma32_port_ops;
1905
1906 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1907 #define ATA_PIO_SHT(drv_name) \
1908 ATA_BASE_SHT(drv_name), \
1909 .sg_tablesize = LIBATA_MAX_PRD, \
1910 .dma_boundary = ATA_DMA_BOUNDARY
1911
1912 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1913 extern u8 ata_sff_check_status(struct ata_port *ap);
1914 extern void ata_sff_pause(struct ata_port *ap);
1915 extern void ata_sff_dma_pause(struct ata_port *ap);
1916 extern int ata_sff_busy_sleep(struct ata_port *ap,
1917 unsigned long timeout_pat, unsigned long timeout);
1918 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1919 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1920 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1921 extern void ata_sff_exec_command(struct ata_port *ap,
1922 const struct ata_taskfile *tf);
1923 extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc,
1924 unsigned char *buf, unsigned int buflen, int rw);
1925 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc,
1926 unsigned char *buf, unsigned int buflen, int rw);
1927 extern void ata_sff_irq_on(struct ata_port *ap);
1928 extern void ata_sff_irq_clear(struct ata_port *ap);
1929 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1930 u8 status, int in_wq);
1931 extern void ata_sff_queue_work(struct work_struct *work);
1932 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1933 unsigned long delay);
1934 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1935 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1936 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1937 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1938 struct ata_queued_cmd *qc);
1939 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1940 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1941 extern void ata_sff_freeze(struct ata_port *ap);
1942 extern void ata_sff_thaw(struct ata_port *ap);
1943 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1944 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1945 u8 *r_err);
1946 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1947 unsigned long deadline);
1948 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1949 unsigned long deadline);
1950 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1951 unsigned long deadline);
1952 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1953 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1954 extern void ata_sff_error_handler(struct ata_port *ap);
1955 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1956 #ifdef CONFIG_PCI
1957 extern int ata_pci_sff_init_host(struct ata_host *host);
1958 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1959 const struct ata_port_info * const * ppi,
1960 struct ata_host **r_host);
1961 extern int ata_pci_sff_activate_host(struct ata_host *host,
1962 irq_handler_t irq_handler,
1963 struct scsi_host_template *sht);
1964 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1965 const struct ata_port_info * const * ppi,
1966 struct scsi_host_template *sht, void *host_priv, int hflags);
1967 #endif /* CONFIG_PCI */
1968
1969 #ifdef CONFIG_ATA_BMDMA
1970
1971 extern const struct ata_port_operations ata_bmdma_port_ops;
1972
1973 #define ATA_BMDMA_SHT(drv_name) \
1974 ATA_BASE_SHT(drv_name), \
1975 .sg_tablesize = LIBATA_MAX_PRD, \
1976 .dma_boundary = ATA_DMA_BOUNDARY
1977
1978 extern enum ata_completion_errors ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1979 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1980 extern enum ata_completion_errors ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1981 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1982 struct ata_queued_cmd *qc);
1983 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1984 extern void ata_bmdma_error_handler(struct ata_port *ap);
1985 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1986 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1987 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1988 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1989 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1990 extern u8 ata_bmdma_status(struct ata_port *ap);
1991 extern int ata_bmdma_port_start(struct ata_port *ap);
1992 extern int ata_bmdma_port_start32(struct ata_port *ap);
1993
1994 #ifdef CONFIG_PCI
1995 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1996 extern void ata_pci_bmdma_init(struct ata_host *host);
1997 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1998 const struct ata_port_info * const * ppi,
1999 struct ata_host **r_host);
2000 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
2001 const struct ata_port_info * const * ppi,
2002 struct scsi_host_template *sht,
2003 void *host_priv, int hflags);
2004 #endif /* CONFIG_PCI */
2005 #endif /* CONFIG_ATA_BMDMA */
2006
2007 /**
2008 * ata_sff_busy_wait - Wait for a port status register
2009 * @ap: Port to wait for.
2010 * @bits: bits that must be clear
2011 * @max: number of 10uS waits to perform
2012 *
2013 * Waits up to max*10 microseconds for the selected bits in the port's
2014 * status register to be cleared.
2015 * Returns final value of status register.
2016 *
2017 * LOCKING:
2018 * Inherited from caller.
2019 */
ata_sff_busy_wait(struct ata_port * ap,unsigned int bits,unsigned int max)2020 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
2021 unsigned int max)
2022 {
2023 u8 status;
2024
2025 do {
2026 udelay(10);
2027 status = ap->ops->sff_check_status(ap);
2028 max--;
2029 } while (status != 0xff && (status & bits) && (max > 0));
2030
2031 return status;
2032 }
2033
2034 /**
2035 * ata_wait_idle - Wait for a port to be idle.
2036 * @ap: Port to wait for.
2037 *
2038 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
2039 * Returns final value of status register.
2040 *
2041 * LOCKING:
2042 * Inherited from caller.
2043 */
ata_wait_idle(struct ata_port * ap)2044 static inline u8 ata_wait_idle(struct ata_port *ap)
2045 {
2046 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
2047
2048 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
2049 ata_port_dbg(ap, "abnormal Status 0x%X\n", status);
2050
2051 return status;
2052 }
2053 #endif /* CONFIG_ATA_SFF */
2054
2055 #endif /* __LINUX_LIBATA_H__ */
2056