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[mirror_ubuntu-artful-kernel.git] / include / linux / libata.h
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/driver-api/libata.rst
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
34 #include <linux/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
40 #include <linux/sched.h>
41
42 /*
43 * Define if arch has non-standard setup. This is a _PCI_ standard
44 * not a legacy or ISA standard.
45 */
46 #ifdef CONFIG_ATA_NONSTANDARD
47 #include <asm/libata-portmap.h>
48 #else
49 #define ATA_PRIMARY_IRQ(dev) 14
50 #define ATA_SECONDARY_IRQ(dev) 15
51 #endif
52
53 /*
54 * compile-time options: to be removed as soon as all the drivers are
55 * converted to the new debugging mechanism
56 */
57 #undef ATA_DEBUG /* debugging output */
58 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
59 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
60 #undef ATA_NDEBUG /* define to disable quick runtime checks */
61
62
63 /* note: prints function name for you */
64 #ifdef ATA_DEBUG
65 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
66 #ifdef ATA_VERBOSE_DEBUG
67 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
68 #else
69 #define VPRINTK(fmt, args...)
70 #endif /* ATA_VERBOSE_DEBUG */
71 #else
72 #define DPRINTK(fmt, args...)
73 #define VPRINTK(fmt, args...)
74 #endif /* ATA_DEBUG */
75
76 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
77
78 #define ata_print_version_once(dev, version) \
79 ({ \
80 static bool __print_once; \
81 \
82 if (!__print_once) { \
83 __print_once = true; \
84 ata_print_version(dev, version); \
85 } \
86 })
87
88 /* NEW: debug levels */
89 #define HAVE_LIBATA_MSG 1
90
91 enum {
92 ATA_MSG_DRV = 0x0001,
93 ATA_MSG_INFO = 0x0002,
94 ATA_MSG_PROBE = 0x0004,
95 ATA_MSG_WARN = 0x0008,
96 ATA_MSG_MALLOC = 0x0010,
97 ATA_MSG_CTL = 0x0020,
98 ATA_MSG_INTR = 0x0040,
99 ATA_MSG_ERR = 0x0080,
100 };
101
102 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
103 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
104 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
105 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
106 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
107 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
108 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
109 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
110
111 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
112 {
113 if (dval < 0 || dval >= (sizeof(u32) * 8))
114 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
115 if (!dval)
116 return 0;
117 return (1 << dval) - 1;
118 }
119
120 /* defines only for the constants which don't work well as enums */
121 #define ATA_TAG_POISON 0xfafbfcfdU
122
123 enum {
124 /* various global constants */
125 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
126 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
127 ATA_DEF_QUEUE = 1,
128 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
129 ATA_MAX_QUEUE = 32,
130 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
131 ATA_SHORT_PAUSE = 16,
132
133 ATAPI_MAX_DRAIN = 16 << 10,
134
135 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
136
137 ATA_SHT_EMULATED = 1,
138 ATA_SHT_THIS_ID = -1,
139 ATA_SHT_USE_CLUSTERING = 1,
140
141 /* struct ata_taskfile flags */
142 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
143 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
144 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
145 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
146 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
147 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
148 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
149
150 /* struct ata_device stuff */
151 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
152 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
153 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
154 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
155 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
156 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
157 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
158 ATA_DFLAG_AN = (1 << 7), /* AN configured */
159 ATA_DFLAG_TRUSTED = (1 << 8), /* device supports trusted send/recv */
160 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
161 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
162
163 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
164 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
165 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
166 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
167 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
168 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
169 ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */
170 ATA_DFLAG_NCQ_PRIO = (1 << 20), /* device supports NCQ priority */
171 ATA_DFLAG_NCQ_PRIO_ENABLE = (1 << 21), /* Priority cmds sent to dev */
172 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
173
174 ATA_DFLAG_DETACH = (1 << 24),
175 ATA_DFLAG_DETACHED = (1 << 25),
176
177 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
178 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */
179 ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
180 ATA_DFLAG_D_SENSE = (1 << 29), /* Descriptor sense requested */
181 ATA_DFLAG_ZAC = (1 << 30), /* ZAC device */
182
183 ATA_DEV_UNKNOWN = 0, /* unknown device */
184 ATA_DEV_ATA = 1, /* ATA device */
185 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
186 ATA_DEV_ATAPI = 3, /* ATAPI device */
187 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
188 ATA_DEV_PMP = 5, /* SATA port multiplier */
189 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
190 ATA_DEV_SEMB = 7, /* SEMB */
191 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
192 ATA_DEV_ZAC = 9, /* ZAC device */
193 ATA_DEV_ZAC_UNSUP = 10, /* ZAC device (unsupported) */
194 ATA_DEV_NONE = 11, /* no device */
195
196 /* struct ata_link flags */
197 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
198 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
199 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
200 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
201 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
202 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
203 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
204 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
205 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
206 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */
207 ATA_LFLAG_CHANGED = (1 << 10), /* LPM state changed on this link */
208 ATA_LFLAG_NO_DB_DELAY = (1 << 11), /* no debounce delay on link resume */
209
210 /* struct ata_port flags */
211 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
212 /* (doesn't imply presence) */
213 ATA_FLAG_SATA = (1 << 1),
214 ATA_FLAG_NO_LOG_PAGE = (1 << 5), /* do not issue log page read */
215 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
216 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
217 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
218 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
219 * doesn't handle PIO interrupts */
220 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
221 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
222 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
223 ATA_FLAG_DEBUGMSG = (1 << 13),
224 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
225 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
226 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
227 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
228 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
229 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
230 ATA_FLAG_FPDMA_AUX = (1 << 20), /* controller supports H2DFIS aux field */
231 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
232 * management */
233 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
234 * led */
235 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
236 ATA_FLAG_SAS_HOST = (1 << 24), /* SAS host */
237
238 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
239
240
241 /* struct ata_port pflags */
242 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
243 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
244 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
245 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
246 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
247 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
248 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
249 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
250 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
251 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
252
253 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
254 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
255 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
256
257 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
258 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
259 ATA_PFLAG_EXTERNAL = (1 << 22), /* eSATA/external port */
260
261 /* struct ata_queued_cmd flags */
262 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
263 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
264 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
265 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
266 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
267 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
268 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
269
270 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
271 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
272 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
273
274 /* host set flags */
275 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
276 ATA_HOST_STARTED = (1 << 1), /* Host started */
277 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
278 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */
279
280 /* bits 24:31 of host->flags are reserved for LLD specific flags */
281
282 /* various lengths of time */
283 ATA_TMOUT_BOOT = 30000, /* heuristic */
284 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
285 ATA_TMOUT_INTERNAL_QUICK = 5000,
286 ATA_TMOUT_MAX_PARK = 30000,
287
288 /*
289 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
290 * is too much without parallel probing. Use 2s if parallel
291 * probing is available, 800ms otherwise.
292 */
293 ATA_TMOUT_FF_WAIT_LONG = 2000,
294 ATA_TMOUT_FF_WAIT = 800,
295
296 /* Spec mandates to wait for ">= 2ms" before checking status
297 * after reset. We wait 150ms, because that was the magic
298 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
299 * the period of time between when the ATA command register is
300 * written, and then status is checked. Because waiting for
301 * "a while" before checking status is fine, post SRST, we
302 * perform this magic delay here as well.
303 *
304 * Old drivers/ide uses the 2mS rule and then waits for ready.
305 */
306 ATA_WAIT_AFTER_RESET = 150,
307
308 /* If PMP is supported, we have to do follow-up SRST. As some
309 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
310 * advised to wait only for the following duration before
311 * doing SRST.
312 */
313 ATA_TMOUT_PMP_SRST_WAIT = 5000,
314
315 /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
316 * be a spurious PHY event, so ignore the first PHY event that
317 * occurs within 10s after the policy change.
318 */
319 ATA_TMOUT_SPURIOUS_PHY = 10000,
320
321 /* ATA bus states */
322 BUS_UNKNOWN = 0,
323 BUS_DMA = 1,
324 BUS_IDLE = 2,
325 BUS_NOINTR = 3,
326 BUS_NODATA = 4,
327 BUS_TIMER = 5,
328 BUS_PIO = 6,
329 BUS_EDD = 7,
330 BUS_IDENTIFY = 8,
331 BUS_PACKET = 9,
332
333 /* SATA port states */
334 PORT_UNKNOWN = 0,
335 PORT_ENABLED = 1,
336 PORT_DISABLED = 2,
337
338 /* encoding various smaller bitmaps into a single
339 * unsigned long bitmap
340 */
341 ATA_NR_PIO_MODES = 7,
342 ATA_NR_MWDMA_MODES = 5,
343 ATA_NR_UDMA_MODES = 8,
344
345 ATA_SHIFT_PIO = 0,
346 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
347 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
348 ATA_SHIFT_PRIO = 6,
349
350 ATA_PRIO_HIGH = 2,
351 /* size of buffer to pad xfers ending on unaligned boundaries */
352 ATA_DMA_PAD_SZ = 4,
353
354 /* ering size */
355 ATA_ERING_SIZE = 32,
356
357 /* return values for ->qc_defer */
358 ATA_DEFER_LINK = 1,
359 ATA_DEFER_PORT = 2,
360
361 /* desc_len for ata_eh_info and context */
362 ATA_EH_DESC_LEN = 80,
363
364 /* reset / recovery action types */
365 ATA_EH_REVALIDATE = (1 << 0),
366 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
367 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
368 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
369 ATA_EH_ENABLE_LINK = (1 << 3),
370 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
371
372 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
373 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
374 ATA_EH_ENABLE_LINK,
375
376 /* ata_eh_info->flags */
377 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
378 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
379 ATA_EHI_QUIET = (1 << 3), /* be quiet */
380 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
381
382 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
383 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
384 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
385 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
386 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
387
388 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
389
390 /* mask of flags to transfer *to* the slave link */
391 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
392
393 /* max tries if error condition is still set after ->error_handler */
394 ATA_EH_MAX_TRIES = 5,
395
396 /* sometimes resuming a link requires several retries */
397 ATA_LINK_RESUME_TRIES = 5,
398
399 /* how hard are we gonna try to probe/recover devices */
400 ATA_PROBE_MAX_TRIES = 3,
401 ATA_EH_DEV_TRIES = 3,
402 ATA_EH_PMP_TRIES = 5,
403 ATA_EH_PMP_LINK_TRIES = 3,
404
405 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
406
407 /* This should match the actual table size of
408 * ata_eh_cmd_timeout_table in libata-eh.c.
409 */
410 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
411
412 /* Horkage types. May be set by libata or controller on drives
413 (some horkage may be drive/controller pair dependent */
414
415 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
416 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
417 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
418 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
419 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
420 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
421 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
422 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
423 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
424 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
425 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
426 not multiple of 16 bytes */
427 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
428 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
429 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
430 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
431 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
432 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */
433 ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */
434 ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19), /* don't use queued TRIM */
435 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
436 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
437 ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
438 ATA_HORKAGE_NO_NCQ_LOG = (1 << 23), /* don't use NCQ for log read */
439 ATA_HORKAGE_NOTRIM = (1 << 24), /* don't use TRIM */
440 ATA_HORKAGE_MAX_SEC_1024 = (1 << 25), /* Limit max sects to 1024 */
441
442 /* DMA mask for user DMA control: User visible values; DO NOT
443 renumber */
444 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
445 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
446 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
447
448 /* ATAPI command types */
449 ATAPI_READ = 0, /* READs */
450 ATAPI_WRITE = 1, /* WRITEs */
451 ATAPI_READ_CD = 2, /* READ CD [MSF] */
452 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
453 ATAPI_MISC = 4, /* the rest */
454
455 /* Timing constants */
456 ATA_TIMING_SETUP = (1 << 0),
457 ATA_TIMING_ACT8B = (1 << 1),
458 ATA_TIMING_REC8B = (1 << 2),
459 ATA_TIMING_CYC8B = (1 << 3),
460 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
461 ATA_TIMING_CYC8B,
462 ATA_TIMING_ACTIVE = (1 << 4),
463 ATA_TIMING_RECOVER = (1 << 5),
464 ATA_TIMING_DMACK_HOLD = (1 << 6),
465 ATA_TIMING_CYCLE = (1 << 7),
466 ATA_TIMING_UDMA = (1 << 8),
467 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
468 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
469 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
470 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
471 ATA_TIMING_UDMA,
472
473 /* ACPI constants */
474 ATA_ACPI_FILTER_SETXFER = 1 << 0,
475 ATA_ACPI_FILTER_LOCK = 1 << 1,
476 ATA_ACPI_FILTER_DIPM = 1 << 2,
477 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
478 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
479
480 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
481 ATA_ACPI_FILTER_LOCK |
482 ATA_ACPI_FILTER_DIPM,
483 };
484
485 enum ata_xfer_mask {
486 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
487 << ATA_SHIFT_PIO,
488 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
489 << ATA_SHIFT_MWDMA,
490 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
491 << ATA_SHIFT_UDMA,
492 };
493
494 enum hsm_task_states {
495 HSM_ST_IDLE, /* no command on going */
496 HSM_ST_FIRST, /* (waiting the device to)
497 write CDB or first data block */
498 HSM_ST, /* (waiting the device to) transfer data */
499 HSM_ST_LAST, /* (waiting the device to) complete command */
500 HSM_ST_ERR, /* error */
501 };
502
503 enum ata_completion_errors {
504 AC_ERR_DEV = (1 << 0), /* device reported error */
505 AC_ERR_HSM = (1 << 1), /* host state machine violation */
506 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
507 AC_ERR_MEDIA = (1 << 3), /* media error */
508 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
509 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
510 AC_ERR_SYSTEM = (1 << 6), /* system error */
511 AC_ERR_INVALID = (1 << 7), /* invalid argument */
512 AC_ERR_OTHER = (1 << 8), /* unknown */
513 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
514 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
515 };
516
517 /*
518 * Link power management policy: If you alter this, you also need to
519 * alter libata-scsi.c (for the ascii descriptions)
520 */
521 enum ata_lpm_policy {
522 ATA_LPM_UNKNOWN,
523 ATA_LPM_MAX_POWER,
524 ATA_LPM_MED_POWER,
525 ATA_LPM_MIN_POWER,
526 };
527
528 enum ata_lpm_hints {
529 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
530 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
531 ATA_LPM_WAKE_ONLY = (1 << 2), /* only wake up link */
532 };
533
534 /* forward declarations */
535 struct scsi_device;
536 struct ata_port_operations;
537 struct ata_port;
538 struct ata_link;
539 struct ata_queued_cmd;
540
541 /* typedefs */
542 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
543 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
544 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
545 unsigned long deadline);
546 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
547
548 extern struct device_attribute dev_attr_link_power_management_policy;
549 extern struct device_attribute dev_attr_unload_heads;
550 extern struct device_attribute dev_attr_ncq_prio_enable;
551 extern struct device_attribute dev_attr_em_message_type;
552 extern struct device_attribute dev_attr_em_message;
553 extern struct device_attribute dev_attr_sw_activity;
554
555 enum sw_activity {
556 OFF,
557 BLINK_ON,
558 BLINK_OFF,
559 };
560
561 struct ata_taskfile {
562 unsigned long flags; /* ATA_TFLAG_xxx */
563 u8 protocol; /* ATA_PROT_xxx */
564
565 u8 ctl; /* control reg */
566
567 u8 hob_feature; /* additional data */
568 u8 hob_nsect; /* to support LBA48 */
569 u8 hob_lbal;
570 u8 hob_lbam;
571 u8 hob_lbah;
572
573 u8 feature;
574 u8 nsect;
575 u8 lbal;
576 u8 lbam;
577 u8 lbah;
578
579 u8 device;
580
581 u8 command; /* IO operation */
582
583 u32 auxiliary; /* auxiliary field */
584 /* from SATA 3.1 and */
585 /* ATA-8 ACS-3 */
586 };
587
588 #ifdef CONFIG_ATA_SFF
589 struct ata_ioports {
590 void __iomem *cmd_addr;
591 void __iomem *data_addr;
592 void __iomem *error_addr;
593 void __iomem *feature_addr;
594 void __iomem *nsect_addr;
595 void __iomem *lbal_addr;
596 void __iomem *lbam_addr;
597 void __iomem *lbah_addr;
598 void __iomem *device_addr;
599 void __iomem *status_addr;
600 void __iomem *command_addr;
601 void __iomem *altstatus_addr;
602 void __iomem *ctl_addr;
603 #ifdef CONFIG_ATA_BMDMA
604 void __iomem *bmdma_addr;
605 #endif /* CONFIG_ATA_BMDMA */
606 void __iomem *scr_addr;
607 };
608 #endif /* CONFIG_ATA_SFF */
609
610 struct ata_host {
611 spinlock_t lock;
612 struct device *dev;
613 void __iomem * const *iomap;
614 unsigned int n_ports;
615 unsigned int n_tags; /* nr of NCQ tags */
616 void *private_data;
617 struct ata_port_operations *ops;
618 unsigned long flags;
619
620 struct mutex eh_mutex;
621 struct task_struct *eh_owner;
622
623 struct ata_port *simplex_claimed; /* channel owning the DMA */
624 struct ata_port *ports[0];
625 };
626
627 struct ata_queued_cmd {
628 struct ata_port *ap;
629 struct ata_device *dev;
630
631 struct scsi_cmnd *scsicmd;
632 void (*scsidone)(struct scsi_cmnd *);
633
634 struct ata_taskfile tf;
635 u8 cdb[ATAPI_CDB_LEN];
636
637 unsigned long flags; /* ATA_QCFLAG_xxx */
638 unsigned int tag;
639 unsigned int n_elem;
640 unsigned int orig_n_elem;
641
642 int dma_dir;
643
644 unsigned int sect_size;
645
646 unsigned int nbytes;
647 unsigned int extrabytes;
648 unsigned int curbytes;
649
650 struct scatterlist sgent;
651
652 struct scatterlist *sg;
653
654 struct scatterlist *cursg;
655 unsigned int cursg_ofs;
656
657 unsigned int err_mask;
658 struct ata_taskfile result_tf;
659 ata_qc_cb_t complete_fn;
660
661 void *private_data;
662 void *lldd_task;
663 };
664
665 struct ata_port_stats {
666 unsigned long unhandled_irq;
667 unsigned long idle_irq;
668 unsigned long rw_reqbuf;
669 };
670
671 struct ata_ering_entry {
672 unsigned int eflags;
673 unsigned int err_mask;
674 u64 timestamp;
675 };
676
677 struct ata_ering {
678 int cursor;
679 struct ata_ering_entry ring[ATA_ERING_SIZE];
680 };
681
682 struct ata_device {
683 struct ata_link *link;
684 unsigned int devno; /* 0 or 1 */
685 unsigned int horkage; /* List of broken features */
686 unsigned long flags; /* ATA_DFLAG_xxx */
687 struct scsi_device *sdev; /* attached SCSI device */
688 void *private_data;
689 #ifdef CONFIG_ATA_ACPI
690 union acpi_object *gtf_cache;
691 unsigned int gtf_filter;
692 #endif
693 #ifdef CONFIG_SATA_ZPODD
694 void *zpodd;
695 #endif
696 struct device tdev;
697 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
698 u64 n_sectors; /* size of device, if ATA */
699 u64 n_native_sectors; /* native size, if ATA */
700 unsigned int class; /* ATA_DEV_xxx */
701 unsigned long unpark_deadline;
702
703 u8 pio_mode;
704 u8 dma_mode;
705 u8 xfer_mode;
706 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
707
708 unsigned int multi_count; /* sectors count for
709 READ/WRITE MULTIPLE */
710 unsigned int max_sectors; /* per-device max sectors */
711 unsigned int cdb_len;
712
713 /* per-dev xfer mask */
714 unsigned long pio_mask;
715 unsigned long mwdma_mask;
716 unsigned long udma_mask;
717
718 /* for CHS addressing */
719 u16 cylinders; /* Number of cylinders */
720 u16 heads; /* Number of heads */
721 u16 sectors; /* Number of sectors per track */
722
723 union {
724 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
725 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
726 } ____cacheline_aligned;
727
728 /* DEVSLP Timing Variables from Identify Device Data Log */
729 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE];
730
731 /* NCQ send and receive log subcommand support */
732 u8 ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE];
733 u8 ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_SIZE];
734
735 /* ZAC zone configuration */
736 u32 zac_zoned_cap;
737 u32 zac_zones_optimal_open;
738 u32 zac_zones_optimal_nonseq;
739 u32 zac_zones_max_open;
740
741 /* error history */
742 int spdn_cnt;
743 /* ering is CLEAR_END, read comment above CLEAR_END */
744 struct ata_ering ering;
745 };
746
747 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
748 * cleared to zero on ata_dev_init().
749 */
750 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
751 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
752
753 struct ata_eh_info {
754 struct ata_device *dev; /* offending device */
755 u32 serror; /* SError from LLDD */
756 unsigned int err_mask; /* port-wide err_mask */
757 unsigned int action; /* ATA_EH_* action mask */
758 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
759 unsigned int flags; /* ATA_EHI_* flags */
760
761 unsigned int probe_mask;
762
763 char desc[ATA_EH_DESC_LEN];
764 int desc_len;
765 };
766
767 struct ata_eh_context {
768 struct ata_eh_info i;
769 int tries[ATA_MAX_DEVICES];
770 int cmd_timeout_idx[ATA_MAX_DEVICES]
771 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
772 unsigned int classes[ATA_MAX_DEVICES];
773 unsigned int did_probe_mask;
774 unsigned int unloaded_mask;
775 unsigned int saved_ncq_enabled;
776 u8 saved_xfer_mode[ATA_MAX_DEVICES];
777 /* timestamp for the last reset attempt or success */
778 unsigned long last_reset;
779 };
780
781 struct ata_acpi_drive
782 {
783 u32 pio;
784 u32 dma;
785 } __packed;
786
787 struct ata_acpi_gtm {
788 struct ata_acpi_drive drive[2];
789 u32 flags;
790 } __packed;
791
792 struct ata_link {
793 struct ata_port *ap;
794 int pmp; /* port multiplier port # */
795
796 struct device tdev;
797 unsigned int active_tag; /* active tag on this link */
798 u32 sactive; /* active NCQ commands */
799
800 unsigned int flags; /* ATA_LFLAG_xxx */
801
802 u32 saved_scontrol; /* SControl on probe */
803 unsigned int hw_sata_spd_limit;
804 unsigned int sata_spd_limit;
805 unsigned int sata_spd; /* current SATA PHY speed */
806 enum ata_lpm_policy lpm_policy;
807
808 /* record runtime error info, protected by host_set lock */
809 struct ata_eh_info eh_info;
810 /* EH context */
811 struct ata_eh_context eh_context;
812
813 struct ata_device device[ATA_MAX_DEVICES];
814
815 unsigned long last_lpm_change; /* when last LPM change happened */
816 };
817 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
818 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
819
820 struct ata_port {
821 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
822 struct ata_port_operations *ops;
823 spinlock_t *lock;
824 /* Flags owned by the EH context. Only EH should touch these once the
825 port is active */
826 unsigned long flags; /* ATA_FLAG_xxx */
827 /* Flags that change dynamically, protected by ap->lock */
828 unsigned int pflags; /* ATA_PFLAG_xxx */
829 unsigned int print_id; /* user visible unique port ID */
830 unsigned int local_port_no; /* host local port num */
831 unsigned int port_no; /* 0 based port no. inside the host */
832
833 #ifdef CONFIG_ATA_SFF
834 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
835 u8 ctl; /* cache of ATA control register */
836 u8 last_ctl; /* Cache last written value */
837 struct ata_link* sff_pio_task_link; /* link currently used */
838 struct delayed_work sff_pio_task;
839 #ifdef CONFIG_ATA_BMDMA
840 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
841 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
842 #endif /* CONFIG_ATA_BMDMA */
843 #endif /* CONFIG_ATA_SFF */
844
845 unsigned int pio_mask;
846 unsigned int mwdma_mask;
847 unsigned int udma_mask;
848 unsigned int cbl; /* cable type; ATA_CBL_xxx */
849
850 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
851 unsigned long sas_tag_allocated; /* for sas tag allocation only */
852 unsigned int qc_active;
853 int nr_active_links; /* #links with active qcs */
854 unsigned int sas_last_tag; /* track next tag hw expects */
855
856 struct ata_link link; /* host default link */
857 struct ata_link *slave_link; /* see ata_slave_link_init() */
858
859 int nr_pmp_links; /* nr of available PMP links */
860 struct ata_link *pmp_link; /* array of PMP links */
861 struct ata_link *excl_link; /* for PMP qc exclusion */
862
863 struct ata_port_stats stats;
864 struct ata_host *host;
865 struct device *dev;
866 struct device tdev;
867
868 struct mutex scsi_scan_mutex;
869 struct delayed_work hotplug_task;
870 struct work_struct scsi_rescan_task;
871
872 unsigned int hsm_task_state;
873
874 u32 msg_enable;
875 struct list_head eh_done_q;
876 wait_queue_head_t eh_wait_q;
877 int eh_tries;
878 struct completion park_req_pending;
879
880 pm_message_t pm_mesg;
881 enum ata_lpm_policy target_lpm_policy;
882
883 struct timer_list fastdrain_timer;
884 unsigned long fastdrain_cnt;
885
886 int em_message_type;
887 void *private_data;
888
889 #ifdef CONFIG_ATA_ACPI
890 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
891 #endif
892 /* owned by EH */
893 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
894 };
895
896 /* The following initializer overrides a method to NULL whether one of
897 * its parent has the method defined or not. This is equivalent to
898 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
899 * expression and thus can't be used as an initializer.
900 */
901 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
902
903 struct ata_port_operations {
904 /*
905 * Command execution
906 */
907 int (*qc_defer)(struct ata_queued_cmd *qc);
908 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
909 void (*qc_prep)(struct ata_queued_cmd *qc);
910 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
911 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
912
913 /*
914 * Configuration and exception handling
915 */
916 int (*cable_detect)(struct ata_port *ap);
917 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
918 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
919 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
920 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
921 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
922
923 void (*dev_config)(struct ata_device *dev);
924
925 void (*freeze)(struct ata_port *ap);
926 void (*thaw)(struct ata_port *ap);
927 ata_prereset_fn_t prereset;
928 ata_reset_fn_t softreset;
929 ata_reset_fn_t hardreset;
930 ata_postreset_fn_t postreset;
931 ata_prereset_fn_t pmp_prereset;
932 ata_reset_fn_t pmp_softreset;
933 ata_reset_fn_t pmp_hardreset;
934 ata_postreset_fn_t pmp_postreset;
935 void (*error_handler)(struct ata_port *ap);
936 void (*lost_interrupt)(struct ata_port *ap);
937 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
938 void (*sched_eh)(struct ata_port *ap);
939 void (*end_eh)(struct ata_port *ap);
940
941 /*
942 * Optional features
943 */
944 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
945 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
946 void (*pmp_attach)(struct ata_port *ap);
947 void (*pmp_detach)(struct ata_port *ap);
948 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
949 unsigned hints);
950
951 /*
952 * Start, stop, suspend and resume
953 */
954 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
955 int (*port_resume)(struct ata_port *ap);
956 int (*port_start)(struct ata_port *ap);
957 void (*port_stop)(struct ata_port *ap);
958 void (*host_stop)(struct ata_host *host);
959
960 #ifdef CONFIG_ATA_SFF
961 /*
962 * SFF / taskfile oriented ops
963 */
964 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
965 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
966 u8 (*sff_check_status)(struct ata_port *ap);
967 u8 (*sff_check_altstatus)(struct ata_port *ap);
968 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
969 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
970 void (*sff_exec_command)(struct ata_port *ap,
971 const struct ata_taskfile *tf);
972 unsigned int (*sff_data_xfer)(struct ata_queued_cmd *qc,
973 unsigned char *buf, unsigned int buflen, int rw);
974 void (*sff_irq_on)(struct ata_port *);
975 bool (*sff_irq_check)(struct ata_port *);
976 void (*sff_irq_clear)(struct ata_port *);
977 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
978
979 #ifdef CONFIG_ATA_BMDMA
980 void (*bmdma_setup)(struct ata_queued_cmd *qc);
981 void (*bmdma_start)(struct ata_queued_cmd *qc);
982 void (*bmdma_stop)(struct ata_queued_cmd *qc);
983 u8 (*bmdma_status)(struct ata_port *ap);
984 #endif /* CONFIG_ATA_BMDMA */
985 #endif /* CONFIG_ATA_SFF */
986
987 ssize_t (*em_show)(struct ata_port *ap, char *buf);
988 ssize_t (*em_store)(struct ata_port *ap, const char *message,
989 size_t size);
990 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
991 ssize_t (*sw_activity_store)(struct ata_device *dev,
992 enum sw_activity val);
993 ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state,
994 ssize_t size);
995
996 /*
997 * Obsolete
998 */
999 void (*phy_reset)(struct ata_port *ap);
1000 void (*eng_timeout)(struct ata_port *ap);
1001
1002 /*
1003 * ->inherits must be the last field and all the preceding
1004 * fields must be pointers.
1005 */
1006 const struct ata_port_operations *inherits;
1007 };
1008
1009 struct ata_port_info {
1010 unsigned long flags;
1011 unsigned long link_flags;
1012 unsigned long pio_mask;
1013 unsigned long mwdma_mask;
1014 unsigned long udma_mask;
1015 struct ata_port_operations *port_ops;
1016 void *private_data;
1017 };
1018
1019 struct ata_timing {
1020 unsigned short mode; /* ATA mode */
1021 unsigned short setup; /* t1 */
1022 unsigned short act8b; /* t2 for 8-bit I/O */
1023 unsigned short rec8b; /* t2i for 8-bit I/O */
1024 unsigned short cyc8b; /* t0 for 8-bit I/O */
1025 unsigned short active; /* t2 or tD */
1026 unsigned short recover; /* t2i or tK */
1027 unsigned short dmack_hold; /* tj */
1028 unsigned short cycle; /* t0 */
1029 unsigned short udma; /* t2CYCTYP/2 */
1030 };
1031
1032 /*
1033 * Core layer - drivers/ata/libata-core.c
1034 */
1035 extern const unsigned long sata_deb_timing_normal[];
1036 extern const unsigned long sata_deb_timing_hotplug[];
1037 extern const unsigned long sata_deb_timing_long[];
1038
1039 extern struct ata_port_operations ata_dummy_port_ops;
1040 extern const struct ata_port_info ata_dummy_port_info;
1041
1042 static inline bool ata_is_atapi(u8 prot)
1043 {
1044 return prot & ATA_PROT_FLAG_ATAPI;
1045 }
1046
1047 static inline bool ata_is_pio(u8 prot)
1048 {
1049 return prot & ATA_PROT_FLAG_PIO;
1050 }
1051
1052 static inline bool ata_is_dma(u8 prot)
1053 {
1054 return prot & ATA_PROT_FLAG_DMA;
1055 }
1056
1057 static inline bool ata_is_ncq(u8 prot)
1058 {
1059 return prot & ATA_PROT_FLAG_NCQ;
1060 }
1061
1062 static inline bool ata_is_data(u8 prot)
1063 {
1064 return prot & (ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA);
1065 }
1066
1067 static inline int is_multi_taskfile(struct ata_taskfile *tf)
1068 {
1069 return (tf->command == ATA_CMD_READ_MULTI) ||
1070 (tf->command == ATA_CMD_WRITE_MULTI) ||
1071 (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1072 (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1073 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1074 }
1075
1076 static inline const unsigned long *
1077 sata_ehc_deb_timing(struct ata_eh_context *ehc)
1078 {
1079 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
1080 return sata_deb_timing_hotplug;
1081 else
1082 return sata_deb_timing_normal;
1083 }
1084
1085 static inline int ata_port_is_dummy(struct ata_port *ap)
1086 {
1087 return ap->ops == &ata_dummy_port_ops;
1088 }
1089
1090 extern int sata_set_spd(struct ata_link *link);
1091 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
1092 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
1093 int (*check_ready)(struct ata_link *link));
1094 extern int sata_link_debounce(struct ata_link *link,
1095 const unsigned long *params, unsigned long deadline);
1096 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
1097 unsigned long deadline);
1098 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
1099 bool spm_wakeup);
1100 extern int sata_link_hardreset(struct ata_link *link,
1101 const unsigned long *timing, unsigned long deadline,
1102 bool *online, int (*check_ready)(struct ata_link *));
1103 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
1104 unsigned long deadline);
1105 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1106
1107 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
1108 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
1109 const struct ata_port_info * const * ppi, int n_ports);
1110 extern int ata_slave_link_init(struct ata_port *ap);
1111 extern int ata_host_start(struct ata_host *host);
1112 extern int ata_host_register(struct ata_host *host,
1113 struct scsi_host_template *sht);
1114 extern int ata_host_activate(struct ata_host *host, int irq,
1115 irq_handler_t irq_handler, unsigned long irq_flags,
1116 struct scsi_host_template *sht);
1117 extern void ata_host_detach(struct ata_host *host);
1118 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
1119 extern int ata_scsi_detect(struct scsi_host_template *sht);
1120 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
1121 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1122 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1123 int cmd, void __user *arg);
1124 extern void ata_sas_port_destroy(struct ata_port *);
1125 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1126 struct ata_port_info *, struct Scsi_Host *);
1127 extern void ata_sas_async_probe(struct ata_port *ap);
1128 extern int ata_sas_sync_probe(struct ata_port *ap);
1129 extern int ata_sas_port_init(struct ata_port *);
1130 extern int ata_sas_port_start(struct ata_port *ap);
1131 extern void ata_sas_port_stop(struct ata_port *ap);
1132 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1133 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1134 extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
1135 extern int sata_scr_valid(struct ata_link *link);
1136 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1137 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1138 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1139 extern bool ata_link_online(struct ata_link *link);
1140 extern bool ata_link_offline(struct ata_link *link);
1141 #ifdef CONFIG_PM
1142 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1143 extern void ata_host_resume(struct ata_host *host);
1144 extern void ata_sas_port_suspend(struct ata_port *ap);
1145 extern void ata_sas_port_resume(struct ata_port *ap);
1146 #else
1147 static inline void ata_sas_port_suspend(struct ata_port *ap)
1148 {
1149 }
1150 static inline void ata_sas_port_resume(struct ata_port *ap)
1151 {
1152 }
1153 #endif
1154 extern int ata_ratelimit(void);
1155 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1156 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1157 u32 val, unsigned long interval, unsigned long timeout);
1158 extern int atapi_cmd_type(u8 opcode);
1159 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1160 u8 pmp, int is_cmd, u8 *fis);
1161 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1162 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1163 unsigned long mwdma_mask, unsigned long udma_mask);
1164 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1165 unsigned long *pio_mask, unsigned long *mwdma_mask,
1166 unsigned long *udma_mask);
1167 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1168 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1169 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1170 extern const char *ata_mode_string(unsigned long xfer_mask);
1171 extern unsigned long ata_id_xfermask(const u16 *id);
1172 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1173 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1174 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1175 unsigned int n_elem);
1176 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1177 extern void ata_dev_disable(struct ata_device *adev);
1178 extern void ata_id_string(const u16 *id, unsigned char *s,
1179 unsigned int ofs, unsigned int len);
1180 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1181 unsigned int ofs, unsigned int len);
1182 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1183 struct ata_taskfile *tf, u16 *id);
1184 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1185 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1186 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1187 extern int ata_std_bios_param(struct scsi_device *sdev,
1188 struct block_device *bdev,
1189 sector_t capacity, int geom[]);
1190 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1191 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1192 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1193 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1194 int queue_depth);
1195 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1196 int queue_depth);
1197 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1198 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1199 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1200 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1201 extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
1202
1203 extern int ata_cable_40wire(struct ata_port *ap);
1204 extern int ata_cable_80wire(struct ata_port *ap);
1205 extern int ata_cable_sata(struct ata_port *ap);
1206 extern int ata_cable_ignore(struct ata_port *ap);
1207 extern int ata_cable_unknown(struct ata_port *ap);
1208
1209 /* Timing helpers */
1210 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1211 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1212 extern int ata_timing_compute(struct ata_device *, unsigned short,
1213 struct ata_timing *, int, int);
1214 extern void ata_timing_merge(const struct ata_timing *,
1215 const struct ata_timing *, struct ata_timing *,
1216 unsigned int);
1217 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1218
1219 /* PCI */
1220 #ifdef CONFIG_PCI
1221 struct pci_dev;
1222
1223 struct pci_bits {
1224 unsigned int reg; /* PCI config register to read */
1225 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1226 unsigned long mask;
1227 unsigned long val;
1228 };
1229
1230 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1231 extern void ata_pci_remove_one(struct pci_dev *pdev);
1232
1233 #ifdef CONFIG_PM
1234 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1235 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1236 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1237 extern int ata_pci_device_resume(struct pci_dev *pdev);
1238 #endif /* CONFIG_PM */
1239 #endif /* CONFIG_PCI */
1240
1241 struct platform_device;
1242
1243 extern int ata_platform_remove_one(struct platform_device *pdev);
1244
1245 /*
1246 * ACPI - drivers/ata/libata-acpi.c
1247 */
1248 #ifdef CONFIG_ATA_ACPI
1249 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1250 {
1251 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1252 return &ap->__acpi_init_gtm;
1253 return NULL;
1254 }
1255 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1256 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1257 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1258 const struct ata_acpi_gtm *gtm);
1259 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1260 #else
1261 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1262 {
1263 return NULL;
1264 }
1265
1266 static inline int ata_acpi_stm(const struct ata_port *ap,
1267 struct ata_acpi_gtm *stm)
1268 {
1269 return -ENOSYS;
1270 }
1271
1272 static inline int ata_acpi_gtm(const struct ata_port *ap,
1273 struct ata_acpi_gtm *stm)
1274 {
1275 return -ENOSYS;
1276 }
1277
1278 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1279 const struct ata_acpi_gtm *gtm)
1280 {
1281 return 0;
1282 }
1283
1284 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1285 const struct ata_acpi_gtm *gtm)
1286 {
1287 return 0;
1288 }
1289 #endif
1290
1291 /*
1292 * EH - drivers/ata/libata-eh.c
1293 */
1294 extern void ata_port_schedule_eh(struct ata_port *ap);
1295 extern void ata_port_wait_eh(struct ata_port *ap);
1296 extern int ata_link_abort(struct ata_link *link);
1297 extern int ata_port_abort(struct ata_port *ap);
1298 extern int ata_port_freeze(struct ata_port *ap);
1299 extern int sata_async_notification(struct ata_port *ap);
1300
1301 extern void ata_eh_freeze_port(struct ata_port *ap);
1302 extern void ata_eh_thaw_port(struct ata_port *ap);
1303
1304 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1305 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1306 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1307
1308 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1309 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1310 ata_postreset_fn_t postreset);
1311 extern void ata_std_error_handler(struct ata_port *ap);
1312 extern void ata_std_sched_eh(struct ata_port *ap);
1313 extern void ata_std_end_eh(struct ata_port *ap);
1314 extern int ata_link_nr_enabled(struct ata_link *link);
1315
1316 /*
1317 * Base operations to inherit from and initializers for sht
1318 *
1319 * Operations
1320 *
1321 * base : Common to all libata drivers.
1322 * sata : SATA controllers w/ native interface.
1323 * pmp : SATA controllers w/ PMP support.
1324 * sff : SFF ATA controllers w/o BMDMA support.
1325 * bmdma : SFF ATA controllers w/ BMDMA support.
1326 *
1327 * sht initializers
1328 *
1329 * BASE : Common to all libata drivers. The user must set
1330 * sg_tablesize and dma_boundary.
1331 * PIO : SFF ATA controllers w/ only PIO support.
1332 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1333 * dma_boundary are set to BMDMA limits.
1334 * NCQ : SATA controllers supporting NCQ. The user must set
1335 * sg_tablesize, dma_boundary and can_queue.
1336 */
1337 extern const struct ata_port_operations ata_base_port_ops;
1338 extern const struct ata_port_operations sata_port_ops;
1339 extern struct device_attribute *ata_common_sdev_attrs[];
1340
1341 /*
1342 * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
1343 * by the edge drivers. Because the 'module' field of sht must be the
1344 * edge driver's module reference, otherwise the driver can be unloaded
1345 * even if the scsi_device is being accessed.
1346 */
1347 #define ATA_BASE_SHT(drv_name) \
1348 .module = THIS_MODULE, \
1349 .name = drv_name, \
1350 .ioctl = ata_scsi_ioctl, \
1351 .queuecommand = ata_scsi_queuecmd, \
1352 .can_queue = ATA_DEF_QUEUE, \
1353 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \
1354 .this_id = ATA_SHT_THIS_ID, \
1355 .emulated = ATA_SHT_EMULATED, \
1356 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1357 .proc_name = drv_name, \
1358 .slave_configure = ata_scsi_slave_config, \
1359 .slave_destroy = ata_scsi_slave_destroy, \
1360 .eh_timed_out = ata_scsi_timed_out, \
1361 .bios_param = ata_std_bios_param, \
1362 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1363 .sdev_attrs = ata_common_sdev_attrs
1364
1365 #define ATA_NCQ_SHT(drv_name) \
1366 ATA_BASE_SHT(drv_name), \
1367 .change_queue_depth = ata_scsi_change_queue_depth
1368
1369 /*
1370 * PMP helpers
1371 */
1372 #ifdef CONFIG_SATA_PMP
1373 static inline bool sata_pmp_supported(struct ata_port *ap)
1374 {
1375 return ap->flags & ATA_FLAG_PMP;
1376 }
1377
1378 static inline bool sata_pmp_attached(struct ata_port *ap)
1379 {
1380 return ap->nr_pmp_links != 0;
1381 }
1382
1383 static inline bool ata_is_host_link(const struct ata_link *link)
1384 {
1385 return link == &link->ap->link || link == link->ap->slave_link;
1386 }
1387 #else /* CONFIG_SATA_PMP */
1388 static inline bool sata_pmp_supported(struct ata_port *ap)
1389 {
1390 return false;
1391 }
1392
1393 static inline bool sata_pmp_attached(struct ata_port *ap)
1394 {
1395 return false;
1396 }
1397
1398 static inline bool ata_is_host_link(const struct ata_link *link)
1399 {
1400 return 1;
1401 }
1402 #endif /* CONFIG_SATA_PMP */
1403
1404 static inline int sata_srst_pmp(struct ata_link *link)
1405 {
1406 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1407 return SATA_PMP_CTRL_PORT;
1408 return link->pmp;
1409 }
1410
1411 /*
1412 * printk helpers
1413 */
1414 __printf(3, 4)
1415 void ata_port_printk(const struct ata_port *ap, const char *level,
1416 const char *fmt, ...);
1417 __printf(3, 4)
1418 void ata_link_printk(const struct ata_link *link, const char *level,
1419 const char *fmt, ...);
1420 __printf(3, 4)
1421 void ata_dev_printk(const struct ata_device *dev, const char *level,
1422 const char *fmt, ...);
1423
1424 #define ata_port_err(ap, fmt, ...) \
1425 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1426 #define ata_port_warn(ap, fmt, ...) \
1427 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1428 #define ata_port_notice(ap, fmt, ...) \
1429 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1430 #define ata_port_info(ap, fmt, ...) \
1431 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1432 #define ata_port_dbg(ap, fmt, ...) \
1433 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1434
1435 #define ata_link_err(link, fmt, ...) \
1436 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1437 #define ata_link_warn(link, fmt, ...) \
1438 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1439 #define ata_link_notice(link, fmt, ...) \
1440 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1441 #define ata_link_info(link, fmt, ...) \
1442 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1443 #define ata_link_dbg(link, fmt, ...) \
1444 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1445
1446 #define ata_dev_err(dev, fmt, ...) \
1447 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1448 #define ata_dev_warn(dev, fmt, ...) \
1449 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1450 #define ata_dev_notice(dev, fmt, ...) \
1451 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1452 #define ata_dev_info(dev, fmt, ...) \
1453 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1454 #define ata_dev_dbg(dev, fmt, ...) \
1455 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1456
1457 void ata_print_version(const struct device *dev, const char *version);
1458
1459 /*
1460 * ata_eh_info helpers
1461 */
1462 extern __printf(2, 3)
1463 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1464 extern __printf(2, 3)
1465 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1466 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1467
1468 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1469 {
1470 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1471 ehi->flags |= ATA_EHI_HOTPLUGGED;
1472 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1473 ehi->err_mask |= AC_ERR_ATA_BUS;
1474 }
1475
1476 /*
1477 * port description helpers
1478 */
1479 extern __printf(2, 3)
1480 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1481 #ifdef CONFIG_PCI
1482 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1483 const char *name);
1484 #endif
1485
1486 static inline unsigned int ata_tag_valid(unsigned int tag)
1487 {
1488 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1489 }
1490
1491 static inline unsigned int ata_tag_internal(unsigned int tag)
1492 {
1493 return tag == ATA_TAG_INTERNAL;
1494 }
1495
1496 /*
1497 * device helpers
1498 */
1499 static inline unsigned int ata_class_enabled(unsigned int class)
1500 {
1501 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1502 class == ATA_DEV_PMP || class == ATA_DEV_SEMB ||
1503 class == ATA_DEV_ZAC;
1504 }
1505
1506 static inline unsigned int ata_class_disabled(unsigned int class)
1507 {
1508 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1509 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP ||
1510 class == ATA_DEV_ZAC_UNSUP;
1511 }
1512
1513 static inline unsigned int ata_class_absent(unsigned int class)
1514 {
1515 return !ata_class_enabled(class) && !ata_class_disabled(class);
1516 }
1517
1518 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1519 {
1520 return ata_class_enabled(dev->class);
1521 }
1522
1523 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1524 {
1525 return ata_class_disabled(dev->class);
1526 }
1527
1528 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1529 {
1530 return ata_class_absent(dev->class);
1531 }
1532
1533 /*
1534 * link helpers
1535 */
1536 static inline int ata_link_max_devices(const struct ata_link *link)
1537 {
1538 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1539 return 2;
1540 return 1;
1541 }
1542
1543 static inline int ata_link_active(struct ata_link *link)
1544 {
1545 return ata_tag_valid(link->active_tag) || link->sactive;
1546 }
1547
1548 /*
1549 * Iterators
1550 *
1551 * ATA_LITER_* constants are used to select link iteration mode and
1552 * ATA_DITER_* device iteration mode.
1553 *
1554 * For a custom iteration directly using ata_{link|dev}_next(), if
1555 * @link or @dev, respectively, is NULL, the first element is
1556 * returned. @dev and @link can be any valid device or link and the
1557 * next element according to the iteration mode will be returned.
1558 * After the last element, NULL is returned.
1559 */
1560 enum ata_link_iter_mode {
1561 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1562 * host link. no slave link */
1563 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1564 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1565 * slave link still comes after host link */
1566 };
1567
1568 enum ata_dev_iter_mode {
1569 ATA_DITER_ENABLED,
1570 ATA_DITER_ENABLED_REVERSE,
1571 ATA_DITER_ALL,
1572 ATA_DITER_ALL_REVERSE,
1573 };
1574
1575 extern struct ata_link *ata_link_next(struct ata_link *link,
1576 struct ata_port *ap,
1577 enum ata_link_iter_mode mode);
1578
1579 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1580 struct ata_link *link,
1581 enum ata_dev_iter_mode mode);
1582
1583 /*
1584 * Shortcut notation for iterations
1585 *
1586 * ata_for_each_link() iterates over each link of @ap according to
1587 * @mode. @link points to the current link in the loop. @link is
1588 * NULL after loop termination. ata_for_each_dev() works the same way
1589 * except that it iterates over each device of @link.
1590 *
1591 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1592 * specified when using the following shorthand notations. Only the
1593 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1594 * specified. This not only increases brevity but also makes it
1595 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1596 */
1597 #define ata_for_each_link(link, ap, mode) \
1598 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1599 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1600
1601 #define ata_for_each_dev(dev, link, mode) \
1602 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1603 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1604
1605 /**
1606 * ata_ncq_enabled - Test whether NCQ is enabled
1607 * @dev: ATA device to test for
1608 *
1609 * LOCKING:
1610 * spin_lock_irqsave(host lock)
1611 *
1612 * RETURNS:
1613 * 1 if NCQ is enabled for @dev, 0 otherwise.
1614 */
1615 static inline int ata_ncq_enabled(struct ata_device *dev)
1616 {
1617 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1618 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1619 }
1620
1621 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev)
1622 {
1623 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1624 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &
1625 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM);
1626 }
1627
1628 static inline bool ata_fpdma_read_log_supported(struct ata_device *dev)
1629 {
1630 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1631 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET] &
1632 ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED);
1633 }
1634
1635 static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev)
1636 {
1637 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1638 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] &
1639 ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED);
1640 }
1641
1642 static inline bool ata_fpdma_zac_mgmt_out_supported(struct ata_device *dev)
1643 {
1644 return (dev->ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OFFSET] &
1645 ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OUT);
1646 }
1647
1648 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1649 {
1650 qc->tf.ctl |= ATA_NIEN;
1651 }
1652
1653 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1654 unsigned int tag)
1655 {
1656 if (likely(ata_tag_valid(tag)))
1657 return &ap->qcmd[tag];
1658 return NULL;
1659 }
1660
1661 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1662 unsigned int tag)
1663 {
1664 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1665
1666 if (unlikely(!qc) || !ap->ops->error_handler)
1667 return qc;
1668
1669 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1670 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1671 return qc;
1672
1673 return NULL;
1674 }
1675
1676 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1677 {
1678 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1679 }
1680
1681 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1682 {
1683 memset(tf, 0, sizeof(*tf));
1684
1685 #ifdef CONFIG_ATA_SFF
1686 tf->ctl = dev->link->ap->ctl;
1687 #else
1688 tf->ctl = ATA_DEVCTL_OBS;
1689 #endif
1690 if (dev->devno == 0)
1691 tf->device = ATA_DEVICE_OBS;
1692 else
1693 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1694 }
1695
1696 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1697 {
1698 qc->dma_dir = DMA_NONE;
1699 qc->sg = NULL;
1700 qc->flags = 0;
1701 qc->cursg = NULL;
1702 qc->cursg_ofs = 0;
1703 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1704 qc->n_elem = 0;
1705 qc->err_mask = 0;
1706 qc->sect_size = ATA_SECT_SIZE;
1707
1708 ata_tf_init(qc->dev, &qc->tf);
1709
1710 /* init result_tf such that it indicates normal completion */
1711 qc->result_tf.command = ATA_DRDY;
1712 qc->result_tf.feature = 0;
1713 }
1714
1715 static inline int ata_try_flush_cache(const struct ata_device *dev)
1716 {
1717 return ata_id_wcache_enabled(dev->id) ||
1718 ata_id_has_flush(dev->id) ||
1719 ata_id_has_flush_ext(dev->id);
1720 }
1721
1722 static inline unsigned int ac_err_mask(u8 status)
1723 {
1724 if (status & (ATA_BUSY | ATA_DRQ))
1725 return AC_ERR_HSM;
1726 if (status & (ATA_ERR | ATA_DF))
1727 return AC_ERR_DEV;
1728 return 0;
1729 }
1730
1731 static inline unsigned int __ac_err_mask(u8 status)
1732 {
1733 unsigned int mask = ac_err_mask(status);
1734 if (mask == 0)
1735 return AC_ERR_OTHER;
1736 return mask;
1737 }
1738
1739 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1740 {
1741 return *(struct ata_port **)&host->hostdata[0];
1742 }
1743
1744 static inline int ata_check_ready(u8 status)
1745 {
1746 if (!(status & ATA_BUSY))
1747 return 1;
1748
1749 /* 0xff indicates either no device or device not ready */
1750 if (status == 0xff)
1751 return -ENODEV;
1752
1753 return 0;
1754 }
1755
1756 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1757 unsigned long timeout_msecs)
1758 {
1759 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1760 }
1761
1762 /* Don't open code these in drivers as there are traps. Firstly the range may
1763 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1764 > UDMA_0. Dyma ddreigiau */
1765
1766 static inline int ata_using_mwdma(struct ata_device *adev)
1767 {
1768 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1769 return 1;
1770 return 0;
1771 }
1772
1773 static inline int ata_using_udma(struct ata_device *adev)
1774 {
1775 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1776 return 1;
1777 return 0;
1778 }
1779
1780 static inline int ata_dma_enabled(struct ata_device *adev)
1781 {
1782 return (adev->dma_mode == 0xFF ? 0 : 1);
1783 }
1784
1785 /**************************************************************************
1786 * PMP - drivers/ata/libata-pmp.c
1787 */
1788 #ifdef CONFIG_SATA_PMP
1789
1790 extern const struct ata_port_operations sata_pmp_port_ops;
1791
1792 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1793 extern void sata_pmp_error_handler(struct ata_port *ap);
1794
1795 #else /* CONFIG_SATA_PMP */
1796
1797 #define sata_pmp_port_ops sata_port_ops
1798 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1799 #define sata_pmp_error_handler ata_std_error_handler
1800
1801 #endif /* CONFIG_SATA_PMP */
1802
1803
1804 /**************************************************************************
1805 * SFF - drivers/ata/libata-sff.c
1806 */
1807 #ifdef CONFIG_ATA_SFF
1808
1809 extern const struct ata_port_operations ata_sff_port_ops;
1810 extern const struct ata_port_operations ata_bmdma32_port_ops;
1811
1812 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1813 #define ATA_PIO_SHT(drv_name) \
1814 ATA_BASE_SHT(drv_name), \
1815 .sg_tablesize = LIBATA_MAX_PRD, \
1816 .dma_boundary = ATA_DMA_BOUNDARY
1817
1818 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1819 extern u8 ata_sff_check_status(struct ata_port *ap);
1820 extern void ata_sff_pause(struct ata_port *ap);
1821 extern void ata_sff_dma_pause(struct ata_port *ap);
1822 extern int ata_sff_busy_sleep(struct ata_port *ap,
1823 unsigned long timeout_pat, unsigned long timeout);
1824 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1825 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1826 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1827 extern void ata_sff_exec_command(struct ata_port *ap,
1828 const struct ata_taskfile *tf);
1829 extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc,
1830 unsigned char *buf, unsigned int buflen, int rw);
1831 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc,
1832 unsigned char *buf, unsigned int buflen, int rw);
1833 extern unsigned int ata_sff_data_xfer_noirq(struct ata_queued_cmd *qc,
1834 unsigned char *buf, unsigned int buflen, int rw);
1835 extern void ata_sff_irq_on(struct ata_port *ap);
1836 extern void ata_sff_irq_clear(struct ata_port *ap);
1837 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1838 u8 status, int in_wq);
1839 extern void ata_sff_queue_work(struct work_struct *work);
1840 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1841 unsigned long delay);
1842 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1843 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1844 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1845 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1846 struct ata_queued_cmd *qc);
1847 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1848 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1849 extern void ata_sff_freeze(struct ata_port *ap);
1850 extern void ata_sff_thaw(struct ata_port *ap);
1851 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1852 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1853 u8 *r_err);
1854 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1855 unsigned long deadline);
1856 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1857 unsigned long deadline);
1858 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1859 unsigned long deadline);
1860 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1861 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1862 extern void ata_sff_error_handler(struct ata_port *ap);
1863 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1864 #ifdef CONFIG_PCI
1865 extern int ata_pci_sff_init_host(struct ata_host *host);
1866 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1867 const struct ata_port_info * const * ppi,
1868 struct ata_host **r_host);
1869 extern int ata_pci_sff_activate_host(struct ata_host *host,
1870 irq_handler_t irq_handler,
1871 struct scsi_host_template *sht);
1872 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1873 const struct ata_port_info * const * ppi,
1874 struct scsi_host_template *sht, void *host_priv, int hflags);
1875 #endif /* CONFIG_PCI */
1876
1877 #ifdef CONFIG_ATA_BMDMA
1878
1879 extern const struct ata_port_operations ata_bmdma_port_ops;
1880
1881 #define ATA_BMDMA_SHT(drv_name) \
1882 ATA_BASE_SHT(drv_name), \
1883 .sg_tablesize = LIBATA_MAX_PRD, \
1884 .dma_boundary = ATA_DMA_BOUNDARY
1885
1886 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1887 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1888 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1889 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1890 struct ata_queued_cmd *qc);
1891 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1892 extern void ata_bmdma_error_handler(struct ata_port *ap);
1893 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1894 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1895 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1896 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1897 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1898 extern u8 ata_bmdma_status(struct ata_port *ap);
1899 extern int ata_bmdma_port_start(struct ata_port *ap);
1900 extern int ata_bmdma_port_start32(struct ata_port *ap);
1901
1902 #ifdef CONFIG_PCI
1903 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1904 extern void ata_pci_bmdma_init(struct ata_host *host);
1905 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1906 const struct ata_port_info * const * ppi,
1907 struct ata_host **r_host);
1908 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1909 const struct ata_port_info * const * ppi,
1910 struct scsi_host_template *sht,
1911 void *host_priv, int hflags);
1912 #endif /* CONFIG_PCI */
1913 #endif /* CONFIG_ATA_BMDMA */
1914
1915 /**
1916 * ata_sff_busy_wait - Wait for a port status register
1917 * @ap: Port to wait for.
1918 * @bits: bits that must be clear
1919 * @max: number of 10uS waits to perform
1920 *
1921 * Waits up to max*10 microseconds for the selected bits in the port's
1922 * status register to be cleared.
1923 * Returns final value of status register.
1924 *
1925 * LOCKING:
1926 * Inherited from caller.
1927 */
1928 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1929 unsigned int max)
1930 {
1931 u8 status;
1932
1933 do {
1934 udelay(10);
1935 status = ap->ops->sff_check_status(ap);
1936 max--;
1937 } while (status != 0xff && (status & bits) && (max > 0));
1938
1939 return status;
1940 }
1941
1942 /**
1943 * ata_wait_idle - Wait for a port to be idle.
1944 * @ap: Port to wait for.
1945 *
1946 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1947 * Returns final value of status register.
1948 *
1949 * LOCKING:
1950 * Inherited from caller.
1951 */
1952 static inline u8 ata_wait_idle(struct ata_port *ap)
1953 {
1954 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1955
1956 #ifdef ATA_DEBUG
1957 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1958 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1959 status);
1960 #endif
1961
1962 return status;
1963 }
1964 #endif /* CONFIG_ATA_SFF */
1965
1966 #endif /* __LINUX_LIBATA_H__ */
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