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_DEBUG /* debugging output */
43 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
44 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
45 #undef ATA_NDEBUG /* define to disable quick runtime checks */
46
47
48 /* note: prints function name for you */
49 #ifdef ATA_DEBUG
50 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
51 #ifdef ATA_VERBOSE_DEBUG
52 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
53 #else
54 #define VPRINTK(fmt, args...)
55 #endif /* ATA_VERBOSE_DEBUG */
56 #else
57 #define DPRINTK(fmt, args...)
58 #define VPRINTK(fmt, args...)
59 #endif /* ATA_DEBUG */
60
61 #define ata_print_version_once(dev, version) \
62 ({ \
63 static bool __print_once; \
64 \
65 if (!__print_once) { \
66 __print_once = true; \
67 ata_print_version(dev, version); \
68 } \
69 })
70
71 /* NEW: debug levels */
72 #define HAVE_LIBATA_MSG 1
73
74 enum {
75 ATA_MSG_DRV = 0x0001,
76 ATA_MSG_INFO = 0x0002,
77 ATA_MSG_PROBE = 0x0004,
78 ATA_MSG_WARN = 0x0008,
79 ATA_MSG_MALLOC = 0x0010,
80 ATA_MSG_CTL = 0x0020,
81 ATA_MSG_INTR = 0x0040,
82 ATA_MSG_ERR = 0x0080,
83 };
84
85 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
86 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
87 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
88 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
89 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
90 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
91 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
92 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
93
ata_msg_init(int dval,int default_msg_enable_bits)94 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
95 {
96 if (dval < 0 || dval >= (sizeof(u32) * 8))
97 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
98 if (!dval)
99 return 0;
100 return (1 << dval) - 1;
101 }
102
103 /* defines only for the constants which don't work well as enums */
104 #define ATA_TAG_POISON 0xfafbfcfdU
105
106 enum {
107 /* various global constants */
108 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
109 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
110 ATA_DEF_QUEUE = 1,
111 ATA_MAX_QUEUE = 32,
112 ATA_TAG_INTERNAL = ATA_MAX_QUEUE,
113 ATA_SHORT_PAUSE = 16,
114
115 ATAPI_MAX_DRAIN = 16 << 10,
116
117 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
118
119 ATA_SHT_EMULATED = 1,
120 ATA_SHT_THIS_ID = -1,
121
122 /* struct ata_taskfile flags */
123 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
124 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
125 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
126 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
127 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
128 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
129 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
130
131 /* struct ata_device stuff */
132 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
133 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
134 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
135 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
136 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
137 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
138 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
139 ATA_DFLAG_AN = (1 << 7), /* AN configured */
140 ATA_DFLAG_TRUSTED = (1 << 8), /* device supports trusted send/recv */
141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
143
144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
149 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
150 ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */
151 ATA_DFLAG_NCQ_PRIO = (1 << 20), /* device supports NCQ priority */
152 ATA_DFLAG_NCQ_PRIO_ENABLE = (1 << 21), /* Priority cmds sent to dev */
153 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
154
155 ATA_DFLAG_DETACH = (1 << 24),
156 ATA_DFLAG_DETACHED = (1 << 25),
157
158 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
159 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */
160 ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
161 ATA_DFLAG_D_SENSE = (1 << 29), /* Descriptor sense requested */
162 ATA_DFLAG_ZAC = (1 << 30), /* ZAC device */
163
164 ATA_DEV_UNKNOWN = 0, /* unknown device */
165 ATA_DEV_ATA = 1, /* ATA device */
166 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
167 ATA_DEV_ATAPI = 3, /* ATAPI device */
168 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
169 ATA_DEV_PMP = 5, /* SATA port multiplier */
170 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
171 ATA_DEV_SEMB = 7, /* SEMB */
172 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
173 ATA_DEV_ZAC = 9, /* ZAC device */
174 ATA_DEV_ZAC_UNSUP = 10, /* ZAC device (unsupported) */
175 ATA_DEV_NONE = 11, /* no device */
176
177 /* struct ata_link flags */
178 /* NOTE: struct ata_force_param currently stores lflags in u16 */
179 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
180 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
181 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
182 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
183 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
184 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
185 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
186 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
187 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
188 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */
189 ATA_LFLAG_CHANGED = (1 << 10), /* LPM state changed on this link */
190 ATA_LFLAG_NO_DB_DELAY = (1 << 11), /* no debounce delay on link resume */
191
192 /* struct ata_port flags */
193 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
194 /* (doesn't imply presence) */
195 ATA_FLAG_SATA = (1 << 1),
196 ATA_FLAG_NO_LPM = (1 << 2), /* host not happy with LPM */
197 ATA_FLAG_NO_LOG_PAGE = (1 << 5), /* do not issue log page read */
198 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
199 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
200 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
201 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
202 * doesn't handle PIO interrupts */
203 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
204 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
205 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
206 ATA_FLAG_DEBUGMSG = (1 << 13),
207 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
208 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
209 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
210 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
211 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
212 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
213 ATA_FLAG_FPDMA_AUX = (1 << 20), /* controller supports H2DFIS aux field */
214 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
215 * management */
216 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
217 * led */
218 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
219 ATA_FLAG_SAS_HOST = (1 << 24), /* SAS host */
220
221 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
222
223
224 /* struct ata_port pflags */
225 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
226 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
227 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
228 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
229 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
230 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
231 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
232 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
233 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
234 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
235
236 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
237 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
238 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
239
240 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
241 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
242 ATA_PFLAG_EXTERNAL = (1 << 22), /* eSATA/external port */
243
244 /* struct ata_queued_cmd flags */
245 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
246 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
247 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
248 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
249 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
250 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
251 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
252
253 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
254 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
255 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
256
257 /* host set flags */
258 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
259 ATA_HOST_STARTED = (1 << 1), /* Host started */
260 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
261 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */
262
263 /* bits 24:31 of host->flags are reserved for LLD specific flags */
264
265 /* various lengths of time */
266 ATA_TMOUT_BOOT = 30000, /* heuristic */
267 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
268 ATA_TMOUT_INTERNAL_QUICK = 5000,
269 ATA_TMOUT_MAX_PARK = 30000,
270
271 /*
272 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
273 * is too much without parallel probing. Use 2s if parallel
274 * probing is available, 800ms otherwise.
275 */
276 ATA_TMOUT_FF_WAIT_LONG = 2000,
277 ATA_TMOUT_FF_WAIT = 800,
278
279 /* Spec mandates to wait for ">= 2ms" before checking status
280 * after reset. We wait 150ms, because that was the magic
281 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
282 * the period of time between when the ATA command register is
283 * written, and then status is checked. Because waiting for
284 * "a while" before checking status is fine, post SRST, we
285 * perform this magic delay here as well.
286 *
287 * Old drivers/ide uses the 2mS rule and then waits for ready.
288 */
289 ATA_WAIT_AFTER_RESET = 150,
290
291 /* If PMP is supported, we have to do follow-up SRST. As some
292 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
293 * advised to wait only for the following duration before
294 * doing SRST.
295 */
296 ATA_TMOUT_PMP_SRST_WAIT = 5000,
297
298 /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
299 * be a spurious PHY event, so ignore the first PHY event that
300 * occurs within 10s after the policy change.
301 */
302 ATA_TMOUT_SPURIOUS_PHY = 10000,
303
304 /* ATA bus states */
305 BUS_UNKNOWN = 0,
306 BUS_DMA = 1,
307 BUS_IDLE = 2,
308 BUS_NOINTR = 3,
309 BUS_NODATA = 4,
310 BUS_TIMER = 5,
311 BUS_PIO = 6,
312 BUS_EDD = 7,
313 BUS_IDENTIFY = 8,
314 BUS_PACKET = 9,
315
316 /* SATA port states */
317 PORT_UNKNOWN = 0,
318 PORT_ENABLED = 1,
319 PORT_DISABLED = 2,
320
321 /* encoding various smaller bitmaps into a single
322 * unsigned long bitmap
323 */
324 ATA_NR_PIO_MODES = 7,
325 ATA_NR_MWDMA_MODES = 5,
326 ATA_NR_UDMA_MODES = 8,
327
328 ATA_SHIFT_PIO = 0,
329 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
330 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
331 ATA_SHIFT_PRIO = 6,
332
333 ATA_PRIO_HIGH = 2,
334 /* size of buffer to pad xfers ending on unaligned boundaries */
335 ATA_DMA_PAD_SZ = 4,
336
337 /* ering size */
338 ATA_ERING_SIZE = 32,
339
340 /* return values for ->qc_defer */
341 ATA_DEFER_LINK = 1,
342 ATA_DEFER_PORT = 2,
343
344 /* desc_len for ata_eh_info and context */
345 ATA_EH_DESC_LEN = 80,
346
347 /* reset / recovery action types */
348 ATA_EH_REVALIDATE = (1 << 0),
349 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
350 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
351 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
352 ATA_EH_ENABLE_LINK = (1 << 3),
353 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
354
355 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
356 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
357 ATA_EH_ENABLE_LINK,
358
359 /* ata_eh_info->flags */
360 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
361 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
362 ATA_EHI_QUIET = (1 << 3), /* be quiet */
363 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
364
365 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
366 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
367 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
368 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
369 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
370
371 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
372
373 /* mask of flags to transfer *to* the slave link */
374 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
375
376 /* max tries if error condition is still set after ->error_handler */
377 ATA_EH_MAX_TRIES = 5,
378
379 /* sometimes resuming a link requires several retries */
380 ATA_LINK_RESUME_TRIES = 5,
381
382 /* how hard are we gonna try to probe/recover devices */
383 ATA_PROBE_MAX_TRIES = 3,
384 ATA_EH_DEV_TRIES = 3,
385 ATA_EH_PMP_TRIES = 5,
386 ATA_EH_PMP_LINK_TRIES = 3,
387
388 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
389
390 /* This should match the actual table size of
391 * ata_eh_cmd_timeout_table in libata-eh.c.
392 */
393 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
394
395 /* Horkage types. May be set by libata or controller on drives
396 (some horkage may be drive/controller pair dependent */
397
398 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
399 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
400 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
401 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
402 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
403 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
404 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
405 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
406 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
407 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
408 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
409 not multiple of 16 bytes */
410 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
411 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
412 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
413 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
414 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
415 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */
416 ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */
417 ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19), /* don't use queued TRIM */
418 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
419 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
420 ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
421 ATA_HORKAGE_NO_DMA_LOG = (1 << 23), /* don't use DMA for log read */
422 ATA_HORKAGE_NOTRIM = (1 << 24), /* don't use TRIM */
423 ATA_HORKAGE_MAX_SEC_1024 = (1 << 25), /* Limit max sects to 1024 */
424 ATA_HORKAGE_MAX_TRIM_128M = (1 << 26), /* Limit max trim size to 128M */
425
426 /* DMA mask for user DMA control: User visible values; DO NOT
427 renumber */
428 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
429 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
430 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
431
432 /* ATAPI command types */
433 ATAPI_READ = 0, /* READs */
434 ATAPI_WRITE = 1, /* WRITEs */
435 ATAPI_READ_CD = 2, /* READ CD [MSF] */
436 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
437 ATAPI_MISC = 4, /* the rest */
438
439 /* Timing constants */
440 ATA_TIMING_SETUP = (1 << 0),
441 ATA_TIMING_ACT8B = (1 << 1),
442 ATA_TIMING_REC8B = (1 << 2),
443 ATA_TIMING_CYC8B = (1 << 3),
444 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
445 ATA_TIMING_CYC8B,
446 ATA_TIMING_ACTIVE = (1 << 4),
447 ATA_TIMING_RECOVER = (1 << 5),
448 ATA_TIMING_DMACK_HOLD = (1 << 6),
449 ATA_TIMING_CYCLE = (1 << 7),
450 ATA_TIMING_UDMA = (1 << 8),
451 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
452 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
453 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
454 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
455 ATA_TIMING_UDMA,
456
457 /* ACPI constants */
458 ATA_ACPI_FILTER_SETXFER = 1 << 0,
459 ATA_ACPI_FILTER_LOCK = 1 << 1,
460 ATA_ACPI_FILTER_DIPM = 1 << 2,
461 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
462 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
463
464 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
465 ATA_ACPI_FILTER_LOCK |
466 ATA_ACPI_FILTER_DIPM,
467 };
468
469 enum ata_xfer_mask {
470 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
471 << ATA_SHIFT_PIO,
472 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
473 << ATA_SHIFT_MWDMA,
474 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
475 << ATA_SHIFT_UDMA,
476 };
477
478 enum hsm_task_states {
479 HSM_ST_IDLE, /* no command on going */
480 HSM_ST_FIRST, /* (waiting the device to)
481 write CDB or first data block */
482 HSM_ST, /* (waiting the device to) transfer data */
483 HSM_ST_LAST, /* (waiting the device to) complete command */
484 HSM_ST_ERR, /* error */
485 };
486
487 enum ata_completion_errors {
488 AC_ERR_OK = 0, /* no error */
489 AC_ERR_DEV = (1 << 0), /* device reported error */
490 AC_ERR_HSM = (1 << 1), /* host state machine violation */
491 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
492 AC_ERR_MEDIA = (1 << 3), /* media error */
493 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
494 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
495 AC_ERR_SYSTEM = (1 << 6), /* system error */
496 AC_ERR_INVALID = (1 << 7), /* invalid argument */
497 AC_ERR_OTHER = (1 << 8), /* unknown */
498 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
499 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
500 };
501
502 /*
503 * Link power management policy: If you alter this, you also need to
504 * alter libata-scsi.c (for the ascii descriptions)
505 */
506 enum ata_lpm_policy {
507 ATA_LPM_UNKNOWN,
508 ATA_LPM_MAX_POWER,
509 ATA_LPM_MED_POWER,
510 ATA_LPM_MED_POWER_WITH_DIPM, /* Med power + DIPM as win IRST does */
511 ATA_LPM_MIN_POWER_WITH_PARTIAL, /* Min Power + partial and slumber */
512 ATA_LPM_MIN_POWER, /* Min power + no partial (slumber only) */
513 };
514
515 enum ata_lpm_hints {
516 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
517 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
518 ATA_LPM_WAKE_ONLY = (1 << 2), /* only wake up link */
519 };
520
521 /* forward declarations */
522 struct scsi_device;
523 struct ata_port_operations;
524 struct ata_port;
525 struct ata_link;
526 struct ata_queued_cmd;
527
528 /* typedefs */
529 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
530 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
531 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
532 unsigned long deadline);
533 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
534
535 extern struct device_attribute dev_attr_unload_heads;
536 #ifdef CONFIG_SATA_HOST
537 extern struct device_attribute dev_attr_link_power_management_policy;
538 extern struct device_attribute dev_attr_ncq_prio_enable;
539 extern struct device_attribute dev_attr_em_message_type;
540 extern struct device_attribute dev_attr_em_message;
541 extern struct device_attribute dev_attr_sw_activity;
542 #endif
543
544 enum sw_activity {
545 OFF,
546 BLINK_ON,
547 BLINK_OFF,
548 };
549
550 struct ata_taskfile {
551 unsigned long flags; /* ATA_TFLAG_xxx */
552 u8 protocol; /* ATA_PROT_xxx */
553
554 u8 ctl; /* control reg */
555
556 u8 hob_feature; /* additional data */
557 u8 hob_nsect; /* to support LBA48 */
558 u8 hob_lbal;
559 u8 hob_lbam;
560 u8 hob_lbah;
561
562 u8 feature;
563 u8 nsect;
564 u8 lbal;
565 u8 lbam;
566 u8 lbah;
567
568 u8 device;
569
570 u8 command; /* IO operation */
571
572 u32 auxiliary; /* auxiliary field */
573 /* from SATA 3.1 and */
574 /* ATA-8 ACS-3 */
575 };
576
577 #ifdef CONFIG_ATA_SFF
578 struct ata_ioports {
579 void __iomem *cmd_addr;
580 void __iomem *data_addr;
581 void __iomem *error_addr;
582 void __iomem *feature_addr;
583 void __iomem *nsect_addr;
584 void __iomem *lbal_addr;
585 void __iomem *lbam_addr;
586 void __iomem *lbah_addr;
587 void __iomem *device_addr;
588 void __iomem *status_addr;
589 void __iomem *command_addr;
590 void __iomem *altstatus_addr;
591 void __iomem *ctl_addr;
592 #ifdef CONFIG_ATA_BMDMA
593 void __iomem *bmdma_addr;
594 #endif /* CONFIG_ATA_BMDMA */
595 void __iomem *scr_addr;
596 };
597 #endif /* CONFIG_ATA_SFF */
598
599 struct ata_host {
600 spinlock_t lock;
601 struct device *dev;
602 void __iomem * const *iomap;
603 unsigned int n_ports;
604 unsigned int n_tags; /* nr of NCQ tags */
605 void *private_data;
606 struct ata_port_operations *ops;
607 unsigned long flags;
608 struct kref kref;
609
610 struct mutex eh_mutex;
611 struct task_struct *eh_owner;
612
613 struct ata_port *simplex_claimed; /* channel owning the DMA */
614 struct ata_port *ports[];
615 };
616
617 struct ata_queued_cmd {
618 struct ata_port *ap;
619 struct ata_device *dev;
620
621 struct scsi_cmnd *scsicmd;
622 void (*scsidone)(struct scsi_cmnd *);
623
624 struct ata_taskfile tf;
625 u8 cdb[ATAPI_CDB_LEN];
626
627 unsigned long flags; /* ATA_QCFLAG_xxx */
628 unsigned int tag; /* libata core tag */
629 unsigned int hw_tag; /* driver tag */
630 unsigned int n_elem;
631 unsigned int orig_n_elem;
632
633 int dma_dir;
634
635 unsigned int sect_size;
636
637 unsigned int nbytes;
638 unsigned int extrabytes;
639 unsigned int curbytes;
640
641 struct scatterlist sgent;
642
643 struct scatterlist *sg;
644
645 struct scatterlist *cursg;
646 unsigned int cursg_ofs;
647
648 unsigned int err_mask;
649 struct ata_taskfile result_tf;
650 ata_qc_cb_t complete_fn;
651
652 void *private_data;
653 void *lldd_task;
654 };
655
656 struct ata_port_stats {
657 unsigned long unhandled_irq;
658 unsigned long idle_irq;
659 unsigned long rw_reqbuf;
660 };
661
662 struct ata_ering_entry {
663 unsigned int eflags;
664 unsigned int err_mask;
665 u64 timestamp;
666 };
667
668 struct ata_ering {
669 int cursor;
670 struct ata_ering_entry ring[ATA_ERING_SIZE];
671 };
672
673 struct ata_device {
674 struct ata_link *link;
675 unsigned int devno; /* 0 or 1 */
676 unsigned int horkage; /* List of broken features */
677 unsigned long flags; /* ATA_DFLAG_xxx */
678 struct scsi_device *sdev; /* attached SCSI device */
679 void *private_data;
680 #ifdef CONFIG_ATA_ACPI
681 union acpi_object *gtf_cache;
682 unsigned int gtf_filter;
683 #endif
684 #ifdef CONFIG_SATA_ZPODD
685 void *zpodd;
686 #endif
687 struct device tdev;
688 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
689 u64 n_sectors; /* size of device, if ATA */
690 u64 n_native_sectors; /* native size, if ATA */
691 unsigned int class; /* ATA_DEV_xxx */
692 unsigned long unpark_deadline;
693
694 u8 pio_mode;
695 u8 dma_mode;
696 u8 xfer_mode;
697 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
698
699 unsigned int multi_count; /* sectors count for
700 READ/WRITE MULTIPLE */
701 unsigned int max_sectors; /* per-device max sectors */
702 unsigned int cdb_len;
703
704 /* per-dev xfer mask */
705 unsigned long pio_mask;
706 unsigned long mwdma_mask;
707 unsigned long udma_mask;
708
709 /* for CHS addressing */
710 u16 cylinders; /* Number of cylinders */
711 u16 heads; /* Number of heads */
712 u16 sectors; /* Number of sectors per track */
713
714 union {
715 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
716 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
717 } ____cacheline_aligned;
718
719 /* DEVSLP Timing Variables from Identify Device Data Log */
720 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE];
721
722 /* NCQ send and receive log subcommand support */
723 u8 ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE];
724 u8 ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_SIZE];
725
726 /* ZAC zone configuration */
727 u32 zac_zoned_cap;
728 u32 zac_zones_optimal_open;
729 u32 zac_zones_optimal_nonseq;
730 u32 zac_zones_max_open;
731
732 /* error history */
733 int spdn_cnt;
734 /* ering is CLEAR_END, read comment above CLEAR_END */
735 struct ata_ering ering;
736 };
737
738 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
739 * cleared to zero on ata_dev_init().
740 */
741 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
742 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
743
744 struct ata_eh_info {
745 struct ata_device *dev; /* offending device */
746 u32 serror; /* SError from LLDD */
747 unsigned int err_mask; /* port-wide err_mask */
748 unsigned int action; /* ATA_EH_* action mask */
749 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
750 unsigned int flags; /* ATA_EHI_* flags */
751
752 unsigned int probe_mask;
753
754 char desc[ATA_EH_DESC_LEN];
755 int desc_len;
756 };
757
758 struct ata_eh_context {
759 struct ata_eh_info i;
760 int tries[ATA_MAX_DEVICES];
761 int cmd_timeout_idx[ATA_MAX_DEVICES]
762 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
763 unsigned int classes[ATA_MAX_DEVICES];
764 unsigned int did_probe_mask;
765 unsigned int unloaded_mask;
766 unsigned int saved_ncq_enabled;
767 u8 saved_xfer_mode[ATA_MAX_DEVICES];
768 /* timestamp for the last reset attempt or success */
769 unsigned long last_reset;
770 };
771
772 struct ata_acpi_drive
773 {
774 u32 pio;
775 u32 dma;
776 } __packed;
777
778 struct ata_acpi_gtm {
779 struct ata_acpi_drive drive[2];
780 u32 flags;
781 } __packed;
782
783 struct ata_link {
784 struct ata_port *ap;
785 int pmp; /* port multiplier port # */
786
787 struct device tdev;
788 unsigned int active_tag; /* active tag on this link */
789 u32 sactive; /* active NCQ commands */
790
791 unsigned int flags; /* ATA_LFLAG_xxx */
792
793 u32 saved_scontrol; /* SControl on probe */
794 unsigned int hw_sata_spd_limit;
795 unsigned int sata_spd_limit;
796 unsigned int sata_spd; /* current SATA PHY speed */
797 enum ata_lpm_policy lpm_policy;
798
799 /* record runtime error info, protected by host_set lock */
800 struct ata_eh_info eh_info;
801 /* EH context */
802 struct ata_eh_context eh_context;
803
804 struct ata_device device[ATA_MAX_DEVICES];
805
806 unsigned long last_lpm_change; /* when last LPM change happened */
807 };
808 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
809 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
810
811 struct ata_port {
812 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
813 struct ata_port_operations *ops;
814 spinlock_t *lock;
815 /* Flags owned by the EH context. Only EH should touch these once the
816 port is active */
817 unsigned long flags; /* ATA_FLAG_xxx */
818 /* Flags that change dynamically, protected by ap->lock */
819 unsigned int pflags; /* ATA_PFLAG_xxx */
820 unsigned int print_id; /* user visible unique port ID */
821 unsigned int local_port_no; /* host local port num */
822 unsigned int port_no; /* 0 based port no. inside the host */
823
824 #ifdef CONFIG_ATA_SFF
825 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
826 u8 ctl; /* cache of ATA control register */
827 u8 last_ctl; /* Cache last written value */
828 struct ata_link* sff_pio_task_link; /* link currently used */
829 struct delayed_work sff_pio_task;
830 #ifdef CONFIG_ATA_BMDMA
831 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
832 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
833 #endif /* CONFIG_ATA_BMDMA */
834 #endif /* CONFIG_ATA_SFF */
835
836 unsigned int pio_mask;
837 unsigned int mwdma_mask;
838 unsigned int udma_mask;
839 unsigned int cbl; /* cable type; ATA_CBL_xxx */
840
841 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE + 1];
842 unsigned long sas_tag_allocated; /* for sas tag allocation only */
843 u64 qc_active;
844 int nr_active_links; /* #links with active qcs */
845 unsigned int sas_last_tag; /* track next tag hw expects */
846
847 struct ata_link link; /* host default link */
848 struct ata_link *slave_link; /* see ata_slave_link_init() */
849
850 int nr_pmp_links; /* nr of available PMP links */
851 struct ata_link *pmp_link; /* array of PMP links */
852 struct ata_link *excl_link; /* for PMP qc exclusion */
853
854 struct ata_port_stats stats;
855 struct ata_host *host;
856 struct device *dev;
857 struct device tdev;
858
859 struct mutex scsi_scan_mutex;
860 struct delayed_work hotplug_task;
861 struct work_struct scsi_rescan_task;
862
863 unsigned int hsm_task_state;
864
865 u32 msg_enable;
866 struct list_head eh_done_q;
867 wait_queue_head_t eh_wait_q;
868 int eh_tries;
869 struct completion park_req_pending;
870
871 pm_message_t pm_mesg;
872 enum ata_lpm_policy target_lpm_policy;
873
874 struct timer_list fastdrain_timer;
875 unsigned long fastdrain_cnt;
876
877 async_cookie_t cookie;
878
879 int em_message_type;
880 void *private_data;
881
882 #ifdef CONFIG_ATA_ACPI
883 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
884 #endif
885 /* owned by EH */
886 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
887 };
888
889 /* The following initializer overrides a method to NULL whether one of
890 * its parent has the method defined or not. This is equivalent to
891 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
892 * expression and thus can't be used as an initializer.
893 */
894 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
895
896 struct ata_port_operations {
897 /*
898 * Command execution
899 */
900 int (*qc_defer)(struct ata_queued_cmd *qc);
901 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
902 enum ata_completion_errors (*qc_prep)(struct ata_queued_cmd *qc);
903 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
904 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
905
906 /*
907 * Configuration and exception handling
908 */
909 int (*cable_detect)(struct ata_port *ap);
910 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
911 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
912 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
913 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
914 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
915
916 void (*dev_config)(struct ata_device *dev);
917
918 void (*freeze)(struct ata_port *ap);
919 void (*thaw)(struct ata_port *ap);
920 ata_prereset_fn_t prereset;
921 ata_reset_fn_t softreset;
922 ata_reset_fn_t hardreset;
923 ata_postreset_fn_t postreset;
924 ata_prereset_fn_t pmp_prereset;
925 ata_reset_fn_t pmp_softreset;
926 ata_reset_fn_t pmp_hardreset;
927 ata_postreset_fn_t pmp_postreset;
928 void (*error_handler)(struct ata_port *ap);
929 void (*lost_interrupt)(struct ata_port *ap);
930 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
931 void (*sched_eh)(struct ata_port *ap);
932 void (*end_eh)(struct ata_port *ap);
933
934 /*
935 * Optional features
936 */
937 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
938 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
939 void (*pmp_attach)(struct ata_port *ap);
940 void (*pmp_detach)(struct ata_port *ap);
941 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
942 unsigned hints);
943
944 /*
945 * Start, stop, suspend and resume
946 */
947 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
948 int (*port_resume)(struct ata_port *ap);
949 int (*port_start)(struct ata_port *ap);
950 void (*port_stop)(struct ata_port *ap);
951 void (*host_stop)(struct ata_host *host);
952
953 #ifdef CONFIG_ATA_SFF
954 /*
955 * SFF / taskfile oriented ops
956 */
957 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
958 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
959 u8 (*sff_check_status)(struct ata_port *ap);
960 u8 (*sff_check_altstatus)(struct ata_port *ap);
961 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
962 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
963 void (*sff_exec_command)(struct ata_port *ap,
964 const struct ata_taskfile *tf);
965 unsigned int (*sff_data_xfer)(struct ata_queued_cmd *qc,
966 unsigned char *buf, unsigned int buflen, int rw);
967 void (*sff_irq_on)(struct ata_port *);
968 bool (*sff_irq_check)(struct ata_port *);
969 void (*sff_irq_clear)(struct ata_port *);
970 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
971
972 #ifdef CONFIG_ATA_BMDMA
973 void (*bmdma_setup)(struct ata_queued_cmd *qc);
974 void (*bmdma_start)(struct ata_queued_cmd *qc);
975 void (*bmdma_stop)(struct ata_queued_cmd *qc);
976 u8 (*bmdma_status)(struct ata_port *ap);
977 #endif /* CONFIG_ATA_BMDMA */
978 #endif /* CONFIG_ATA_SFF */
979
980 ssize_t (*em_show)(struct ata_port *ap, char *buf);
981 ssize_t (*em_store)(struct ata_port *ap, const char *message,
982 size_t size);
983 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
984 ssize_t (*sw_activity_store)(struct ata_device *dev,
985 enum sw_activity val);
986 ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state,
987 ssize_t size);
988
989 /*
990 * Obsolete
991 */
992 void (*phy_reset)(struct ata_port *ap);
993 void (*eng_timeout)(struct ata_port *ap);
994
995 /*
996 * ->inherits must be the last field and all the preceding
997 * fields must be pointers.
998 */
999 const struct ata_port_operations *inherits;
1000 };
1001
1002 struct ata_port_info {
1003 unsigned long flags;
1004 unsigned long link_flags;
1005 unsigned long pio_mask;
1006 unsigned long mwdma_mask;
1007 unsigned long udma_mask;
1008 struct ata_port_operations *port_ops;
1009 void *private_data;
1010 };
1011
1012 struct ata_timing {
1013 unsigned short mode; /* ATA mode */
1014 unsigned short setup; /* t1 */
1015 unsigned short act8b; /* t2 for 8-bit I/O */
1016 unsigned short rec8b; /* t2i for 8-bit I/O */
1017 unsigned short cyc8b; /* t0 for 8-bit I/O */
1018 unsigned short active; /* t2 or tD */
1019 unsigned short recover; /* t2i or tK */
1020 unsigned short dmack_hold; /* tj */
1021 unsigned short cycle; /* t0 */
1022 unsigned short udma; /* t2CYCTYP/2 */
1023 };
1024
1025 /*
1026 * Core layer - drivers/ata/libata-core.c
1027 */
1028 extern struct ata_port_operations ata_dummy_port_ops;
1029 extern const struct ata_port_info ata_dummy_port_info;
1030
ata_is_atapi(u8 prot)1031 static inline bool ata_is_atapi(u8 prot)
1032 {
1033 return prot & ATA_PROT_FLAG_ATAPI;
1034 }
1035
ata_is_pio(u8 prot)1036 static inline bool ata_is_pio(u8 prot)
1037 {
1038 return prot & ATA_PROT_FLAG_PIO;
1039 }
1040
ata_is_dma(u8 prot)1041 static inline bool ata_is_dma(u8 prot)
1042 {
1043 return prot & ATA_PROT_FLAG_DMA;
1044 }
1045
ata_is_ncq(u8 prot)1046 static inline bool ata_is_ncq(u8 prot)
1047 {
1048 return prot & ATA_PROT_FLAG_NCQ;
1049 }
1050
ata_is_data(u8 prot)1051 static inline bool ata_is_data(u8 prot)
1052 {
1053 return prot & (ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA);
1054 }
1055
is_multi_taskfile(struct ata_taskfile * tf)1056 static inline int is_multi_taskfile(struct ata_taskfile *tf)
1057 {
1058 return (tf->command == ATA_CMD_READ_MULTI) ||
1059 (tf->command == ATA_CMD_WRITE_MULTI) ||
1060 (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1061 (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1062 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1063 }
1064
ata_port_is_dummy(struct ata_port * ap)1065 static inline int ata_port_is_dummy(struct ata_port *ap)
1066 {
1067 return ap->ops == &ata_dummy_port_ops;
1068 }
1069
1070 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
1071 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
1072 int (*check_ready)(struct ata_link *link));
1073 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
1074 unsigned long deadline);
1075 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1076
1077 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
1078 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
1079 const struct ata_port_info * const * ppi, int n_ports);
1080 extern void ata_host_get(struct ata_host *host);
1081 extern void ata_host_put(struct ata_host *host);
1082 extern int ata_host_start(struct ata_host *host);
1083 extern int ata_host_register(struct ata_host *host,
1084 struct scsi_host_template *sht);
1085 extern int ata_host_activate(struct ata_host *host, int irq,
1086 irq_handler_t irq_handler, unsigned long irq_flags,
1087 struct scsi_host_template *sht);
1088 extern void ata_host_detach(struct ata_host *host);
1089 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
1090 extern int ata_scsi_detect(struct scsi_host_template *sht);
1091 extern int ata_scsi_ioctl(struct scsi_device *dev, unsigned int cmd,
1092 void __user *arg);
1093 #ifdef CONFIG_COMPAT
1094 #define ATA_SCSI_COMPAT_IOCTL .compat_ioctl = ata_scsi_ioctl,
1095 #else
1096 #define ATA_SCSI_COMPAT_IOCTL /* empty */
1097 #endif
1098 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1099 #if IS_REACHABLE(CONFIG_ATA)
1100 bool ata_scsi_dma_need_drain(struct request *rq);
1101 #else
1102 #define ata_scsi_dma_need_drain NULL
1103 #endif
1104 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1105 unsigned int cmd, void __user *arg);
1106 extern bool ata_link_online(struct ata_link *link);
1107 extern bool ata_link_offline(struct ata_link *link);
1108 #ifdef CONFIG_PM
1109 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1110 extern void ata_host_resume(struct ata_host *host);
1111 extern void ata_sas_port_suspend(struct ata_port *ap);
1112 extern void ata_sas_port_resume(struct ata_port *ap);
1113 #else
ata_sas_port_suspend(struct ata_port * ap)1114 static inline void ata_sas_port_suspend(struct ata_port *ap)
1115 {
1116 }
ata_sas_port_resume(struct ata_port * ap)1117 static inline void ata_sas_port_resume(struct ata_port *ap)
1118 {
1119 }
1120 #endif
1121 extern int ata_ratelimit(void);
1122 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1123 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1124 u32 val, unsigned long interval, unsigned long timeout);
1125 extern int atapi_cmd_type(u8 opcode);
1126 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1127 unsigned long mwdma_mask, unsigned long udma_mask);
1128 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1129 unsigned long *pio_mask, unsigned long *mwdma_mask,
1130 unsigned long *udma_mask);
1131 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1132 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1133 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1134 extern const char *ata_mode_string(unsigned long xfer_mask);
1135 extern unsigned long ata_id_xfermask(const u16 *id);
1136 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1137 extern enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc);
1138 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1139 unsigned int n_elem);
1140 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1141 extern void ata_dev_disable(struct ata_device *adev);
1142 extern void ata_id_string(const u16 *id, unsigned char *s,
1143 unsigned int ofs, unsigned int len);
1144 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1145 unsigned int ofs, unsigned int len);
1146 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1147 struct ata_taskfile *tf, u16 *id);
1148 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1149 extern u64 ata_qc_get_active(struct ata_port *ap);
1150 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1151 extern int ata_std_bios_param(struct scsi_device *sdev,
1152 struct block_device *bdev,
1153 sector_t capacity, int geom[]);
1154 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1155 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1156 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1157 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1158 int queue_depth);
1159 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1160 int queue_depth);
1161 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1162 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1163 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1164 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1165
1166 /*
1167 * SATA specific code - drivers/ata/libata-sata.c
1168 */
1169 #ifdef CONFIG_SATA_HOST
1170 extern const unsigned long sata_deb_timing_normal[];
1171 extern const unsigned long sata_deb_timing_hotplug[];
1172 extern const unsigned long sata_deb_timing_long[];
1173
1174 static inline const unsigned long *
sata_ehc_deb_timing(struct ata_eh_context * ehc)1175 sata_ehc_deb_timing(struct ata_eh_context *ehc)
1176 {
1177 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
1178 return sata_deb_timing_hotplug;
1179 else
1180 return sata_deb_timing_normal;
1181 }
1182
1183 extern int sata_scr_valid(struct ata_link *link);
1184 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1185 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1186 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1187 extern int sata_set_spd(struct ata_link *link);
1188 extern int sata_link_hardreset(struct ata_link *link,
1189 const unsigned long *timing, unsigned long deadline,
1190 bool *online, int (*check_ready)(struct ata_link *));
1191 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
1192 unsigned long deadline);
1193 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1194 #else
1195 static inline const unsigned long *
sata_ehc_deb_timing(struct ata_eh_context * ehc)1196 sata_ehc_deb_timing(struct ata_eh_context *ehc)
1197 {
1198 return NULL;
1199 }
sata_scr_valid(struct ata_link * link)1200 static inline int sata_scr_valid(struct ata_link *link) { return 0; }
sata_scr_read(struct ata_link * link,int reg,u32 * val)1201 static inline int sata_scr_read(struct ata_link *link, int reg, u32 *val)
1202 {
1203 return -EOPNOTSUPP;
1204 }
sata_scr_write(struct ata_link * link,int reg,u32 val)1205 static inline int sata_scr_write(struct ata_link *link, int reg, u32 val)
1206 {
1207 return -EOPNOTSUPP;
1208 }
sata_scr_write_flush(struct ata_link * link,int reg,u32 val)1209 static inline int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
1210 {
1211 return -EOPNOTSUPP;
1212 }
sata_set_spd(struct ata_link * link)1213 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 *))1214 static inline int sata_link_hardreset(struct ata_link *link,
1215 const unsigned long *timing,
1216 unsigned long deadline,
1217 bool *online,
1218 int (*check_ready)(struct ata_link *))
1219 {
1220 if (online)
1221 *online = false;
1222 return -EOPNOTSUPP;
1223 }
sata_link_resume(struct ata_link * link,const unsigned long * params,unsigned long deadline)1224 static inline int sata_link_resume(struct ata_link *link,
1225 const unsigned long *params,
1226 unsigned long deadline)
1227 {
1228 return -EOPNOTSUPP;
1229 }
ata_eh_analyze_ncq_error(struct ata_link * link)1230 static inline void ata_eh_analyze_ncq_error(struct ata_link *link) { }
1231 #endif
1232 extern int sata_link_debounce(struct ata_link *link,
1233 const unsigned long *params, unsigned long deadline);
1234 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
1235 bool spm_wakeup);
1236 extern int ata_slave_link_init(struct ata_port *ap);
1237 extern void ata_sas_port_destroy(struct ata_port *);
1238 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1239 struct ata_port_info *, struct Scsi_Host *);
1240 extern void ata_sas_async_probe(struct ata_port *ap);
1241 extern int ata_sas_sync_probe(struct ata_port *ap);
1242 extern int ata_sas_port_init(struct ata_port *);
1243 extern int ata_sas_port_start(struct ata_port *ap);
1244 extern int ata_sas_tport_add(struct device *parent, struct ata_port *ap);
1245 extern void ata_sas_tport_delete(struct ata_port *ap);
1246 extern void ata_sas_port_stop(struct ata_port *ap);
1247 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1248 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1249 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1250 u8 pmp, int is_cmd, u8 *fis);
1251 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1252 extern int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active);
1253 extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
1254 extern int sata_async_notification(struct ata_port *ap);
1255
1256 extern int ata_cable_40wire(struct ata_port *ap);
1257 extern int ata_cable_80wire(struct ata_port *ap);
1258 extern int ata_cable_sata(struct ata_port *ap);
1259 extern int ata_cable_ignore(struct ata_port *ap);
1260 extern int ata_cable_unknown(struct ata_port *ap);
1261
1262 /* Timing helpers */
1263 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1264 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1265
1266 /* PCI */
1267 #ifdef CONFIG_PCI
1268 struct pci_dev;
1269
1270 struct pci_bits {
1271 unsigned int reg; /* PCI config register to read */
1272 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1273 unsigned long mask;
1274 unsigned long val;
1275 };
1276
1277 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1278 extern void ata_pci_shutdown_one(struct pci_dev *pdev);
1279 extern void ata_pci_remove_one(struct pci_dev *pdev);
1280
1281 #ifdef CONFIG_PM
1282 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1283 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1284 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1285 extern int ata_pci_device_resume(struct pci_dev *pdev);
1286 #endif /* CONFIG_PM */
1287 #endif /* CONFIG_PCI */
1288
1289 struct platform_device;
1290
1291 extern int ata_platform_remove_one(struct platform_device *pdev);
1292
1293 /*
1294 * ACPI - drivers/ata/libata-acpi.c
1295 */
1296 #ifdef CONFIG_ATA_ACPI
ata_acpi_init_gtm(struct ata_port * ap)1297 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1298 {
1299 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1300 return &ap->__acpi_init_gtm;
1301 return NULL;
1302 }
1303 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1304 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1305 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1306 const struct ata_acpi_gtm *gtm);
1307 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1308 #else
ata_acpi_init_gtm(struct ata_port * ap)1309 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1310 {
1311 return NULL;
1312 }
1313
ata_acpi_stm(const struct ata_port * ap,struct ata_acpi_gtm * stm)1314 static inline int ata_acpi_stm(const struct ata_port *ap,
1315 struct ata_acpi_gtm *stm)
1316 {
1317 return -ENOSYS;
1318 }
1319
ata_acpi_gtm(const struct ata_port * ap,struct ata_acpi_gtm * stm)1320 static inline int ata_acpi_gtm(const struct ata_port *ap,
1321 struct ata_acpi_gtm *stm)
1322 {
1323 return -ENOSYS;
1324 }
1325
ata_acpi_gtm_xfermask(struct ata_device * dev,const struct ata_acpi_gtm * gtm)1326 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1327 const struct ata_acpi_gtm *gtm)
1328 {
1329 return 0;
1330 }
1331
ata_acpi_cbl_80wire(struct ata_port * ap,const struct ata_acpi_gtm * gtm)1332 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1333 const struct ata_acpi_gtm *gtm)
1334 {
1335 return 0;
1336 }
1337 #endif
1338
1339 /*
1340 * EH - drivers/ata/libata-eh.c
1341 */
1342 extern void ata_port_schedule_eh(struct ata_port *ap);
1343 extern void ata_port_wait_eh(struct ata_port *ap);
1344 extern int ata_link_abort(struct ata_link *link);
1345 extern int ata_port_abort(struct ata_port *ap);
1346 extern int ata_port_freeze(struct ata_port *ap);
1347
1348 extern void ata_eh_freeze_port(struct ata_port *ap);
1349 extern void ata_eh_thaw_port(struct ata_port *ap);
1350
1351 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1352 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1353
1354 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1355 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1356 ata_postreset_fn_t postreset);
1357 extern void ata_std_error_handler(struct ata_port *ap);
1358 extern void ata_std_sched_eh(struct ata_port *ap);
1359 extern void ata_std_end_eh(struct ata_port *ap);
1360 extern int ata_link_nr_enabled(struct ata_link *link);
1361
1362 /*
1363 * Base operations to inherit from and initializers for sht
1364 *
1365 * Operations
1366 *
1367 * base : Common to all libata drivers.
1368 * sata : SATA controllers w/ native interface.
1369 * pmp : SATA controllers w/ PMP support.
1370 * sff : SFF ATA controllers w/o BMDMA support.
1371 * bmdma : SFF ATA controllers w/ BMDMA support.
1372 *
1373 * sht initializers
1374 *
1375 * BASE : Common to all libata drivers. The user must set
1376 * sg_tablesize and dma_boundary.
1377 * PIO : SFF ATA controllers w/ only PIO support.
1378 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1379 * dma_boundary are set to BMDMA limits.
1380 * NCQ : SATA controllers supporting NCQ. The user must set
1381 * sg_tablesize, dma_boundary and can_queue.
1382 */
1383 extern const struct ata_port_operations ata_base_port_ops;
1384 extern const struct ata_port_operations sata_port_ops;
1385 extern struct device_attribute *ata_common_sdev_attrs[];
1386
1387 /*
1388 * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
1389 * by the edge drivers. Because the 'module' field of sht must be the
1390 * edge driver's module reference, otherwise the driver can be unloaded
1391 * even if the scsi_device is being accessed.
1392 */
1393 #define __ATA_BASE_SHT(drv_name) \
1394 .module = THIS_MODULE, \
1395 .name = drv_name, \
1396 .ioctl = ata_scsi_ioctl, \
1397 ATA_SCSI_COMPAT_IOCTL \
1398 .queuecommand = ata_scsi_queuecmd, \
1399 .dma_need_drain = ata_scsi_dma_need_drain, \
1400 .can_queue = ATA_DEF_QUEUE, \
1401 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \
1402 .this_id = ATA_SHT_THIS_ID, \
1403 .emulated = ATA_SHT_EMULATED, \
1404 .proc_name = drv_name, \
1405 .slave_configure = ata_scsi_slave_config, \
1406 .slave_destroy = ata_scsi_slave_destroy, \
1407 .bios_param = ata_std_bios_param, \
1408 .unlock_native_capacity = ata_scsi_unlock_native_capacity
1409
1410 #define ATA_BASE_SHT(drv_name) \
1411 __ATA_BASE_SHT(drv_name), \
1412 .sdev_attrs = ata_common_sdev_attrs
1413
1414 #ifdef CONFIG_SATA_HOST
1415 extern struct device_attribute *ata_ncq_sdev_attrs[];
1416
1417 #define ATA_NCQ_SHT(drv_name) \
1418 __ATA_BASE_SHT(drv_name), \
1419 .sdev_attrs = ata_ncq_sdev_attrs, \
1420 .change_queue_depth = ata_scsi_change_queue_depth
1421 #endif
1422
1423 /*
1424 * PMP helpers
1425 */
1426 #ifdef CONFIG_SATA_PMP
sata_pmp_supported(struct ata_port * ap)1427 static inline bool sata_pmp_supported(struct ata_port *ap)
1428 {
1429 return ap->flags & ATA_FLAG_PMP;
1430 }
1431
sata_pmp_attached(struct ata_port * ap)1432 static inline bool sata_pmp_attached(struct ata_port *ap)
1433 {
1434 return ap->nr_pmp_links != 0;
1435 }
1436
ata_is_host_link(const struct ata_link * link)1437 static inline bool ata_is_host_link(const struct ata_link *link)
1438 {
1439 return link == &link->ap->link || link == link->ap->slave_link;
1440 }
1441 #else /* CONFIG_SATA_PMP */
sata_pmp_supported(struct ata_port * ap)1442 static inline bool sata_pmp_supported(struct ata_port *ap)
1443 {
1444 return false;
1445 }
1446
sata_pmp_attached(struct ata_port * ap)1447 static inline bool sata_pmp_attached(struct ata_port *ap)
1448 {
1449 return false;
1450 }
1451
ata_is_host_link(const struct ata_link * link)1452 static inline bool ata_is_host_link(const struct ata_link *link)
1453 {
1454 return 1;
1455 }
1456 #endif /* CONFIG_SATA_PMP */
1457
sata_srst_pmp(struct ata_link * link)1458 static inline int sata_srst_pmp(struct ata_link *link)
1459 {
1460 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1461 return SATA_PMP_CTRL_PORT;
1462 return link->pmp;
1463 }
1464
1465 /*
1466 * printk helpers
1467 */
1468 __printf(3, 4)
1469 void ata_port_printk(const struct ata_port *ap, const char *level,
1470 const char *fmt, ...);
1471 __printf(3, 4)
1472 void ata_link_printk(const struct ata_link *link, const char *level,
1473 const char *fmt, ...);
1474 __printf(3, 4)
1475 void ata_dev_printk(const struct ata_device *dev, const char *level,
1476 const char *fmt, ...);
1477
1478 #define ata_port_err(ap, fmt, ...) \
1479 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1480 #define ata_port_warn(ap, fmt, ...) \
1481 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1482 #define ata_port_notice(ap, fmt, ...) \
1483 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1484 #define ata_port_info(ap, fmt, ...) \
1485 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1486 #define ata_port_dbg(ap, fmt, ...) \
1487 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1488
1489 #define ata_link_err(link, fmt, ...) \
1490 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1491 #define ata_link_warn(link, fmt, ...) \
1492 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1493 #define ata_link_notice(link, fmt, ...) \
1494 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1495 #define ata_link_info(link, fmt, ...) \
1496 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1497 #define ata_link_dbg(link, fmt, ...) \
1498 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1499
1500 #define ata_dev_err(dev, fmt, ...) \
1501 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1502 #define ata_dev_warn(dev, fmt, ...) \
1503 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1504 #define ata_dev_notice(dev, fmt, ...) \
1505 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1506 #define ata_dev_info(dev, fmt, ...) \
1507 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1508 #define ata_dev_dbg(dev, fmt, ...) \
1509 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1510
1511 void ata_print_version(const struct device *dev, const char *version);
1512
1513 /*
1514 * ata_eh_info helpers
1515 */
1516 extern __printf(2, 3)
1517 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1518 extern __printf(2, 3)
1519 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1520 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1521
ata_ehi_hotplugged(struct ata_eh_info * ehi)1522 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1523 {
1524 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1525 ehi->flags |= ATA_EHI_HOTPLUGGED;
1526 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1527 ehi->err_mask |= AC_ERR_ATA_BUS;
1528 }
1529
1530 /*
1531 * port description helpers
1532 */
1533 extern __printf(2, 3)
1534 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1535 #ifdef CONFIG_PCI
1536 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1537 const char *name);
1538 #endif
1539
ata_tag_internal(unsigned int tag)1540 static inline bool ata_tag_internal(unsigned int tag)
1541 {
1542 return tag == ATA_TAG_INTERNAL;
1543 }
1544
ata_tag_valid(unsigned int tag)1545 static inline bool ata_tag_valid(unsigned int tag)
1546 {
1547 return tag < ATA_MAX_QUEUE || ata_tag_internal(tag);
1548 }
1549
1550 #define __ata_qc_for_each(ap, qc, tag, max_tag, fn) \
1551 for ((tag) = 0; (tag) < (max_tag) && \
1552 ({ qc = fn((ap), (tag)); 1; }); (tag)++) \
1553
1554 /*
1555 * Internal use only, iterate commands ignoring error handling and
1556 * status of 'qc'.
1557 */
1558 #define ata_qc_for_each_raw(ap, qc, tag) \
1559 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, __ata_qc_from_tag)
1560
1561 /*
1562 * Iterate all potential commands that can be queued
1563 */
1564 #define ata_qc_for_each(ap, qc, tag) \
1565 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, ata_qc_from_tag)
1566
1567 /*
1568 * Like ata_qc_for_each, but with the internal tag included
1569 */
1570 #define ata_qc_for_each_with_internal(ap, qc, tag) \
1571 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE + 1, ata_qc_from_tag)
1572
1573 /*
1574 * device helpers
1575 */
ata_class_enabled(unsigned int class)1576 static inline unsigned int ata_class_enabled(unsigned int class)
1577 {
1578 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1579 class == ATA_DEV_PMP || class == ATA_DEV_SEMB ||
1580 class == ATA_DEV_ZAC;
1581 }
1582
ata_class_disabled(unsigned int class)1583 static inline unsigned int ata_class_disabled(unsigned int class)
1584 {
1585 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1586 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP ||
1587 class == ATA_DEV_ZAC_UNSUP;
1588 }
1589
ata_class_absent(unsigned int class)1590 static inline unsigned int ata_class_absent(unsigned int class)
1591 {
1592 return !ata_class_enabled(class) && !ata_class_disabled(class);
1593 }
1594
ata_dev_enabled(const struct ata_device * dev)1595 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1596 {
1597 return ata_class_enabled(dev->class);
1598 }
1599
ata_dev_disabled(const struct ata_device * dev)1600 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1601 {
1602 return ata_class_disabled(dev->class);
1603 }
1604
ata_dev_absent(const struct ata_device * dev)1605 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1606 {
1607 return ata_class_absent(dev->class);
1608 }
1609
1610 /*
1611 * link helpers
1612 */
ata_link_max_devices(const struct ata_link * link)1613 static inline int ata_link_max_devices(const struct ata_link *link)
1614 {
1615 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1616 return 2;
1617 return 1;
1618 }
1619
ata_link_active(struct ata_link * link)1620 static inline int ata_link_active(struct ata_link *link)
1621 {
1622 return ata_tag_valid(link->active_tag) || link->sactive;
1623 }
1624
1625 /*
1626 * Iterators
1627 *
1628 * ATA_LITER_* constants are used to select link iteration mode and
1629 * ATA_DITER_* device iteration mode.
1630 *
1631 * For a custom iteration directly using ata_{link|dev}_next(), if
1632 * @link or @dev, respectively, is NULL, the first element is
1633 * returned. @dev and @link can be any valid device or link and the
1634 * next element according to the iteration mode will be returned.
1635 * After the last element, NULL is returned.
1636 */
1637 enum ata_link_iter_mode {
1638 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1639 * host link. no slave link */
1640 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1641 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1642 * slave link still comes after host link */
1643 };
1644
1645 enum ata_dev_iter_mode {
1646 ATA_DITER_ENABLED,
1647 ATA_DITER_ENABLED_REVERSE,
1648 ATA_DITER_ALL,
1649 ATA_DITER_ALL_REVERSE,
1650 };
1651
1652 extern struct ata_link *ata_link_next(struct ata_link *link,
1653 struct ata_port *ap,
1654 enum ata_link_iter_mode mode);
1655
1656 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1657 struct ata_link *link,
1658 enum ata_dev_iter_mode mode);
1659
1660 /*
1661 * Shortcut notation for iterations
1662 *
1663 * ata_for_each_link() iterates over each link of @ap according to
1664 * @mode. @link points to the current link in the loop. @link is
1665 * NULL after loop termination. ata_for_each_dev() works the same way
1666 * except that it iterates over each device of @link.
1667 *
1668 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1669 * specified when using the following shorthand notations. Only the
1670 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1671 * specified. This not only increases brevity but also makes it
1672 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1673 */
1674 #define ata_for_each_link(link, ap, mode) \
1675 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1676 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1677
1678 #define ata_for_each_dev(dev, link, mode) \
1679 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1680 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1681
1682 /**
1683 * ata_ncq_enabled - Test whether NCQ is enabled
1684 * @dev: ATA device to test for
1685 *
1686 * LOCKING:
1687 * spin_lock_irqsave(host lock)
1688 *
1689 * RETURNS:
1690 * 1 if NCQ is enabled for @dev, 0 otherwise.
1691 */
ata_ncq_enabled(struct ata_device * dev)1692 static inline int ata_ncq_enabled(struct ata_device *dev)
1693 {
1694 if (!IS_ENABLED(CONFIG_SATA_HOST))
1695 return 0;
1696 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1697 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1698 }
1699
ata_fpdma_dsm_supported(struct ata_device * dev)1700 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev)
1701 {
1702 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1703 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &
1704 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM);
1705 }
1706
ata_fpdma_read_log_supported(struct ata_device * dev)1707 static inline bool ata_fpdma_read_log_supported(struct ata_device *dev)
1708 {
1709 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1710 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET] &
1711 ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED);
1712 }
1713
ata_fpdma_zac_mgmt_in_supported(struct ata_device * dev)1714 static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev)
1715 {
1716 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1717 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] &
1718 ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED);
1719 }
1720
ata_fpdma_zac_mgmt_out_supported(struct ata_device * dev)1721 static inline bool ata_fpdma_zac_mgmt_out_supported(struct ata_device *dev)
1722 {
1723 return (dev->ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OFFSET] &
1724 ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OUT);
1725 }
1726
ata_qc_set_polling(struct ata_queued_cmd * qc)1727 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1728 {
1729 qc->tf.ctl |= ATA_NIEN;
1730 }
1731
__ata_qc_from_tag(struct ata_port * ap,unsigned int tag)1732 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1733 unsigned int tag)
1734 {
1735 if (ata_tag_valid(tag))
1736 return &ap->qcmd[tag];
1737 return NULL;
1738 }
1739
ata_qc_from_tag(struct ata_port * ap,unsigned int tag)1740 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1741 unsigned int tag)
1742 {
1743 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1744
1745 if (unlikely(!qc) || !ap->ops->error_handler)
1746 return qc;
1747
1748 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1749 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1750 return qc;
1751
1752 return NULL;
1753 }
1754
ata_qc_raw_nbytes(struct ata_queued_cmd * qc)1755 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1756 {
1757 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1758 }
1759
ata_tf_init(struct ata_device * dev,struct ata_taskfile * tf)1760 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1761 {
1762 memset(tf, 0, sizeof(*tf));
1763
1764 #ifdef CONFIG_ATA_SFF
1765 tf->ctl = dev->link->ap->ctl;
1766 #else
1767 tf->ctl = ATA_DEVCTL_OBS;
1768 #endif
1769 if (dev->devno == 0)
1770 tf->device = ATA_DEVICE_OBS;
1771 else
1772 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1773 }
1774
ata_qc_reinit(struct ata_queued_cmd * qc)1775 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1776 {
1777 qc->dma_dir = DMA_NONE;
1778 qc->sg = NULL;
1779 qc->flags = 0;
1780 qc->cursg = NULL;
1781 qc->cursg_ofs = 0;
1782 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1783 qc->n_elem = 0;
1784 qc->err_mask = 0;
1785 qc->sect_size = ATA_SECT_SIZE;
1786
1787 ata_tf_init(qc->dev, &qc->tf);
1788
1789 /* init result_tf such that it indicates normal completion */
1790 qc->result_tf.command = ATA_DRDY;
1791 qc->result_tf.feature = 0;
1792 }
1793
ata_try_flush_cache(const struct ata_device * dev)1794 static inline int ata_try_flush_cache(const struct ata_device *dev)
1795 {
1796 return ata_id_wcache_enabled(dev->id) ||
1797 ata_id_has_flush(dev->id) ||
1798 ata_id_has_flush_ext(dev->id);
1799 }
1800
ac_err_mask(u8 status)1801 static inline unsigned int ac_err_mask(u8 status)
1802 {
1803 if (status & (ATA_BUSY | ATA_DRQ))
1804 return AC_ERR_HSM;
1805 if (status & (ATA_ERR | ATA_DF))
1806 return AC_ERR_DEV;
1807 return 0;
1808 }
1809
__ac_err_mask(u8 status)1810 static inline unsigned int __ac_err_mask(u8 status)
1811 {
1812 unsigned int mask = ac_err_mask(status);
1813 if (mask == 0)
1814 return AC_ERR_OTHER;
1815 return mask;
1816 }
1817
ata_shost_to_port(struct Scsi_Host * host)1818 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1819 {
1820 return *(struct ata_port **)&host->hostdata[0];
1821 }
1822
ata_check_ready(u8 status)1823 static inline int ata_check_ready(u8 status)
1824 {
1825 if (!(status & ATA_BUSY))
1826 return 1;
1827
1828 /* 0xff indicates either no device or device not ready */
1829 if (status == 0xff)
1830 return -ENODEV;
1831
1832 return 0;
1833 }
1834
ata_deadline(unsigned long from_jiffies,unsigned long timeout_msecs)1835 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1836 unsigned long timeout_msecs)
1837 {
1838 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1839 }
1840
1841 /* Don't open code these in drivers as there are traps. Firstly the range may
1842 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1843 > UDMA_0. Dyma ddreigiau */
1844
ata_using_mwdma(struct ata_device * adev)1845 static inline int ata_using_mwdma(struct ata_device *adev)
1846 {
1847 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1848 return 1;
1849 return 0;
1850 }
1851
ata_using_udma(struct ata_device * adev)1852 static inline int ata_using_udma(struct ata_device *adev)
1853 {
1854 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1855 return 1;
1856 return 0;
1857 }
1858
ata_dma_enabled(struct ata_device * adev)1859 static inline int ata_dma_enabled(struct ata_device *adev)
1860 {
1861 return (adev->dma_mode == 0xFF ? 0 : 1);
1862 }
1863
1864 /**************************************************************************
1865 * PATA timings - drivers/ata/libata-pata-timings.c
1866 */
1867 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1868 extern int ata_timing_compute(struct ata_device *, unsigned short,
1869 struct ata_timing *, int, int);
1870 extern void ata_timing_merge(const struct ata_timing *,
1871 const struct ata_timing *, struct ata_timing *,
1872 unsigned int);
1873
1874 /**************************************************************************
1875 * PMP - drivers/ata/libata-pmp.c
1876 */
1877 #ifdef CONFIG_SATA_PMP
1878
1879 extern const struct ata_port_operations sata_pmp_port_ops;
1880
1881 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1882 extern void sata_pmp_error_handler(struct ata_port *ap);
1883
1884 #else /* CONFIG_SATA_PMP */
1885
1886 #define sata_pmp_port_ops sata_port_ops
1887 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1888 #define sata_pmp_error_handler ata_std_error_handler
1889
1890 #endif /* CONFIG_SATA_PMP */
1891
1892
1893 /**************************************************************************
1894 * SFF - drivers/ata/libata-sff.c
1895 */
1896 #ifdef CONFIG_ATA_SFF
1897
1898 extern const struct ata_port_operations ata_sff_port_ops;
1899 extern const struct ata_port_operations ata_bmdma32_port_ops;
1900
1901 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1902 #define ATA_PIO_SHT(drv_name) \
1903 ATA_BASE_SHT(drv_name), \
1904 .sg_tablesize = LIBATA_MAX_PRD, \
1905 .dma_boundary = ATA_DMA_BOUNDARY
1906
1907 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1908 extern u8 ata_sff_check_status(struct ata_port *ap);
1909 extern void ata_sff_pause(struct ata_port *ap);
1910 extern void ata_sff_dma_pause(struct ata_port *ap);
1911 extern int ata_sff_busy_sleep(struct ata_port *ap,
1912 unsigned long timeout_pat, unsigned long timeout);
1913 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1914 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1915 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1916 extern void ata_sff_exec_command(struct ata_port *ap,
1917 const struct ata_taskfile *tf);
1918 extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc,
1919 unsigned char *buf, unsigned int buflen, int rw);
1920 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc,
1921 unsigned char *buf, unsigned int buflen, int rw);
1922 extern void ata_sff_irq_on(struct ata_port *ap);
1923 extern void ata_sff_irq_clear(struct ata_port *ap);
1924 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1925 u8 status, int in_wq);
1926 extern void ata_sff_queue_work(struct work_struct *work);
1927 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1928 unsigned long delay);
1929 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1930 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1931 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1932 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1933 struct ata_queued_cmd *qc);
1934 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1935 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1936 extern void ata_sff_freeze(struct ata_port *ap);
1937 extern void ata_sff_thaw(struct ata_port *ap);
1938 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1939 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1940 u8 *r_err);
1941 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1942 unsigned long deadline);
1943 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1944 unsigned long deadline);
1945 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1946 unsigned long deadline);
1947 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1948 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1949 extern void ata_sff_error_handler(struct ata_port *ap);
1950 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1951 #ifdef CONFIG_PCI
1952 extern int ata_pci_sff_init_host(struct ata_host *host);
1953 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1954 const struct ata_port_info * const * ppi,
1955 struct ata_host **r_host);
1956 extern int ata_pci_sff_activate_host(struct ata_host *host,
1957 irq_handler_t irq_handler,
1958 struct scsi_host_template *sht);
1959 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1960 const struct ata_port_info * const * ppi,
1961 struct scsi_host_template *sht, void *host_priv, int hflags);
1962 #endif /* CONFIG_PCI */
1963
1964 #ifdef CONFIG_ATA_BMDMA
1965
1966 extern const struct ata_port_operations ata_bmdma_port_ops;
1967
1968 #define ATA_BMDMA_SHT(drv_name) \
1969 ATA_BASE_SHT(drv_name), \
1970 .sg_tablesize = LIBATA_MAX_PRD, \
1971 .dma_boundary = ATA_DMA_BOUNDARY
1972
1973 extern enum ata_completion_errors ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1974 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1975 extern enum ata_completion_errors ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1976 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1977 struct ata_queued_cmd *qc);
1978 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1979 extern void ata_bmdma_error_handler(struct ata_port *ap);
1980 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1981 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1982 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1983 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1984 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1985 extern u8 ata_bmdma_status(struct ata_port *ap);
1986 extern int ata_bmdma_port_start(struct ata_port *ap);
1987 extern int ata_bmdma_port_start32(struct ata_port *ap);
1988
1989 #ifdef CONFIG_PCI
1990 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1991 extern void ata_pci_bmdma_init(struct ata_host *host);
1992 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1993 const struct ata_port_info * const * ppi,
1994 struct ata_host **r_host);
1995 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1996 const struct ata_port_info * const * ppi,
1997 struct scsi_host_template *sht,
1998 void *host_priv, int hflags);
1999 #endif /* CONFIG_PCI */
2000 #endif /* CONFIG_ATA_BMDMA */
2001
2002 /**
2003 * ata_sff_busy_wait - Wait for a port status register
2004 * @ap: Port to wait for.
2005 * @bits: bits that must be clear
2006 * @max: number of 10uS waits to perform
2007 *
2008 * Waits up to max*10 microseconds for the selected bits in the port's
2009 * status register to be cleared.
2010 * Returns final value of status register.
2011 *
2012 * LOCKING:
2013 * Inherited from caller.
2014 */
ata_sff_busy_wait(struct ata_port * ap,unsigned int bits,unsigned int max)2015 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
2016 unsigned int max)
2017 {
2018 u8 status;
2019
2020 do {
2021 udelay(10);
2022 status = ap->ops->sff_check_status(ap);
2023 max--;
2024 } while (status != 0xff && (status & bits) && (max > 0));
2025
2026 return status;
2027 }
2028
2029 /**
2030 * ata_wait_idle - Wait for a port to be idle.
2031 * @ap: Port to wait for.
2032 *
2033 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
2034 * Returns final value of status register.
2035 *
2036 * LOCKING:
2037 * Inherited from caller.
2038 */
ata_wait_idle(struct ata_port * ap)2039 static inline u8 ata_wait_idle(struct ata_port *ap)
2040 {
2041 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
2042
2043 #ifdef ATA_DEBUG
2044 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
2045 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
2046 status);
2047 #endif
2048
2049 return status;
2050 }
2051 #endif /* CONFIG_ATA_SFF */
2052
2053 #endif /* __LINUX_LIBATA_H__ */
2054
