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[ARM] S3C: Fix scaler1 clock rate information
[linux-2.6/openmoko-kernel.git] / include / linux / libata.h
blobc7665a4134c552af7559ff1d4737eba9e33e30b3
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
34 #include <linux/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
40
41 /*
42 * Define if arch has non-standard setup. This is a _PCI_ standard
43 * not a legacy or ISA standard.
44 */
45 #ifdef CONFIG_ATA_NONSTANDARD
46 #include <asm/libata-portmap.h>
47 #else
48 #include <asm-generic/libata-portmap.h>
49 #endif
50
51 /*
52 * compile-time options: to be removed as soon as all the drivers are
53 * converted to the new debugging mechanism
54 */
55 #undef ATA_DEBUG /* debugging output */
56 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
57 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
58 #undef ATA_NDEBUG /* define to disable quick runtime checks */
59
60
61 /* note: prints function name for you */
62 #ifdef ATA_DEBUG
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
66 #else
67 #define VPRINTK(fmt, args...)
68 #endif /* ATA_VERBOSE_DEBUG */
69 #else
70 #define DPRINTK(fmt, args...)
71 #define VPRINTK(fmt, args...)
72 #endif /* ATA_DEBUG */
73
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
75
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
78
79 enum {
80 ATA_MSG_DRV = 0x0001,
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_CTL = 0x0020,
86 ATA_MSG_INTR = 0x0040,
87 ATA_MSG_ERR = 0x0080,
88 };
89
90 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98
99 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100 {
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 if (!dval)
104 return 0;
105 return (1 << dval) - 1;
106 }
107
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
110
111 enum {
112 /* various global constants */
113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
115 ATA_DEF_QUEUE = 1,
116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
117 ATA_MAX_QUEUE = 32,
118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
119 ATA_SHORT_PAUSE = 16,
120
121 ATAPI_MAX_DRAIN = 16 << 10,
122
123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
124
125 ATA_SHT_EMULATED = 1,
126 ATA_SHT_CMD_PER_LUN = 1,
127 ATA_SHT_THIS_ID = -1,
128 ATA_SHT_USE_CLUSTERING = 1,
129
130 /* struct ata_device stuff */
131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
138 ATA_DFLAG_AN = (1 << 7), /* AN configured */
139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
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_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
147 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
148 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
149 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
151
152 ATA_DFLAG_DETACH = (1 << 24),
153 ATA_DFLAG_DETACHED = (1 << 25),
154
155 ATA_DEV_UNKNOWN = 0, /* unknown device */
156 ATA_DEV_ATA = 1, /* ATA device */
157 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
158 ATA_DEV_ATAPI = 3, /* ATAPI device */
159 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
160 ATA_DEV_PMP = 5, /* SATA port multiplier */
161 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
162 ATA_DEV_SEMB = 7, /* SEMB */
163 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
164 ATA_DEV_NONE = 9, /* no device */
165
166 /* struct ata_link flags */
167 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
168 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
169 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
170 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
171 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
174 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
175
176 /* struct ata_port flags */
177 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
178 /* (doesn't imply presence) */
179 ATA_FLAG_SATA = (1 << 1),
180 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
181 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
182 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
183 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
184 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
185 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
186 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
187 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
188 * doesn't handle PIO interrupts */
189 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
190 ATA_FLAG_DEBUGMSG = (1 << 13),
191 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
192 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
193 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
194 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
195 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
196 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
197 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
198 * management */
199 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
200 * led */
201
202 /* The following flag belongs to ap->pflags but is kept in
203 * ap->flags because it's referenced in many LLDs and will be
204 * removed in not-too-distant future.
205 */
206 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
207
208 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
209
210 /* struct ata_port pflags */
211 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
212 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
213 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
214 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
215 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
216 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
217 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
218 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
219 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
220
221 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
222 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
223 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
224
225 /* struct ata_queued_cmd flags */
226 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
227 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
228 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
229 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
230 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
231 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
232 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
233
234 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
235 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
236 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
237
238 /* host set flags */
239 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
240 ATA_HOST_STARTED = (1 << 1), /* Host started */
241
242 /* bits 24:31 of host->flags are reserved for LLD specific flags */
243
244 /* various lengths of time */
245 ATA_TMOUT_BOOT = 30000, /* heuristic */
246 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
247 ATA_TMOUT_INTERNAL_QUICK = 5000,
248 ATA_TMOUT_MAX_PARK = 30000,
249
250 /* FIXME: GoVault needs 2s but we can't afford that without
251 * parallel probing. 800ms is enough for iVDR disk
252 * HHD424020F7SV00. Increase to 2secs when parallel probing
253 * is in place.
254 */
255 ATA_TMOUT_FF_WAIT = 800,
256
257 /* Spec mandates to wait for ">= 2ms" before checking status
258 * after reset. We wait 150ms, because that was the magic
259 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
260 * the period of time between when the ATA command register is
261 * written, and then status is checked. Because waiting for
262 * "a while" before checking status is fine, post SRST, we
263 * perform this magic delay here as well.
264 *
265 * Old drivers/ide uses the 2mS rule and then waits for ready.
266 */
267 ATA_WAIT_AFTER_RESET = 150,
268
269 /* If PMP is supported, we have to do follow-up SRST. As some
270 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
271 * advised to wait only for the following duration before
272 * doing SRST.
273 */
274 ATA_TMOUT_PMP_SRST_WAIT = 1000,
275
276 /* ATA bus states */
277 BUS_UNKNOWN = 0,
278 BUS_DMA = 1,
279 BUS_IDLE = 2,
280 BUS_NOINTR = 3,
281 BUS_NODATA = 4,
282 BUS_TIMER = 5,
283 BUS_PIO = 6,
284 BUS_EDD = 7,
285 BUS_IDENTIFY = 8,
286 BUS_PACKET = 9,
287
288 /* SATA port states */
289 PORT_UNKNOWN = 0,
290 PORT_ENABLED = 1,
291 PORT_DISABLED = 2,
292
293 /* encoding various smaller bitmaps into a single
294 * unsigned long bitmap
295 */
296 ATA_NR_PIO_MODES = 7,
297 ATA_NR_MWDMA_MODES = 5,
298 ATA_NR_UDMA_MODES = 8,
299
300 ATA_SHIFT_PIO = 0,
301 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
302 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
303
304 /* size of buffer to pad xfers ending on unaligned boundaries */
305 ATA_DMA_PAD_SZ = 4,
306
307 /* ering size */
308 ATA_ERING_SIZE = 32,
309
310 /* return values for ->qc_defer */
311 ATA_DEFER_LINK = 1,
312 ATA_DEFER_PORT = 2,
313
314 /* desc_len for ata_eh_info and context */
315 ATA_EH_DESC_LEN = 80,
316
317 /* reset / recovery action types */
318 ATA_EH_REVALIDATE = (1 << 0),
319 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
320 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
321 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
322 ATA_EH_ENABLE_LINK = (1 << 3),
323 ATA_EH_LPM = (1 << 4), /* link power management action */
324 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
325
326 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
327 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
328 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
329
330 /* ata_eh_info->flags */
331 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
332 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
333 ATA_EHI_QUIET = (1 << 3), /* be quiet */
334
335 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
336 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
337 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
338 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
339 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
340
341 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
342
343 /* mask of flags to transfer *to* the slave link */
344 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
345
346 /* max tries if error condition is still set after ->error_handler */
347 ATA_EH_MAX_TRIES = 5,
348
349 /* how hard are we gonna try to probe/recover devices */
350 ATA_PROBE_MAX_TRIES = 3,
351 ATA_EH_DEV_TRIES = 3,
352 ATA_EH_PMP_TRIES = 5,
353 ATA_EH_PMP_LINK_TRIES = 3,
354
355 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
356
357 /* This should match the actual table size of
358 * ata_eh_cmd_timeout_table in libata-eh.c.
359 */
360 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
361
362 /* Horkage types. May be set by libata or controller on drives
363 (some horkage may be drive/controller pair dependant */
364
365 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
366 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
367 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
368 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
369 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
370 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
371 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
372 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
373 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
374 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
375 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
376 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
377 not multiple of 16 bytes */
378
379 /* DMA mask for user DMA control: User visible values; DO NOT
380 renumber */
381 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
382 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
383 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
384
385 /* ATAPI command types */
386 ATAPI_READ = 0, /* READs */
387 ATAPI_WRITE = 1, /* WRITEs */
388 ATAPI_READ_CD = 2, /* READ CD [MSF] */
389 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
390 ATAPI_MISC = 4, /* the rest */
391
392 /* Timing constants */
393 ATA_TIMING_SETUP = (1 << 0),
394 ATA_TIMING_ACT8B = (1 << 1),
395 ATA_TIMING_REC8B = (1 << 2),
396 ATA_TIMING_CYC8B = (1 << 3),
397 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
398 ATA_TIMING_CYC8B,
399 ATA_TIMING_ACTIVE = (1 << 4),
400 ATA_TIMING_RECOVER = (1 << 5),
401 ATA_TIMING_CYCLE = (1 << 6),
402 ATA_TIMING_UDMA = (1 << 7),
403 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
404 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
405 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
406 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
407 };
408
409 enum ata_xfer_mask {
410 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
411 << ATA_SHIFT_PIO,
412 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
413 << ATA_SHIFT_MWDMA,
414 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
415 << ATA_SHIFT_UDMA,
416 };
417
418 enum hsm_task_states {
419 HSM_ST_IDLE, /* no command on going */
420 HSM_ST_FIRST, /* (waiting the device to)
421 write CDB or first data block */
422 HSM_ST, /* (waiting the device to) transfer data */
423 HSM_ST_LAST, /* (waiting the device to) complete command */
424 HSM_ST_ERR, /* error */
425 };
426
427 enum ata_completion_errors {
428 AC_ERR_DEV = (1 << 0), /* device reported error */
429 AC_ERR_HSM = (1 << 1), /* host state machine violation */
430 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
431 AC_ERR_MEDIA = (1 << 3), /* media error */
432 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
433 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
434 AC_ERR_SYSTEM = (1 << 6), /* system error */
435 AC_ERR_INVALID = (1 << 7), /* invalid argument */
436 AC_ERR_OTHER = (1 << 8), /* unknown */
437 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
438 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
439 };
440
441 /* forward declarations */
442 struct scsi_device;
443 struct ata_port_operations;
444 struct ata_port;
445 struct ata_link;
446 struct ata_queued_cmd;
447
448 /* typedefs */
449 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
450 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
451 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
452 unsigned long deadline);
453 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
454
455 /*
456 * host pm policy: If you alter this, you also need to alter libata-scsi.c
457 * (for the ascii descriptions)
458 */
459 enum link_pm {
460 NOT_AVAILABLE,
461 MIN_POWER,
462 MAX_PERFORMANCE,
463 MEDIUM_POWER,
464 };
465 extern struct device_attribute dev_attr_link_power_management_policy;
466 extern struct device_attribute dev_attr_unload_heads;
467 extern struct device_attribute dev_attr_em_message_type;
468 extern struct device_attribute dev_attr_em_message;
469 extern struct device_attribute dev_attr_sw_activity;
470
471 enum sw_activity {
472 OFF,
473 BLINK_ON,
474 BLINK_OFF,
475 };
476
477 #ifdef CONFIG_ATA_SFF
478 struct ata_ioports {
479 void __iomem *cmd_addr;
480 void __iomem *data_addr;
481 void __iomem *error_addr;
482 void __iomem *feature_addr;
483 void __iomem *nsect_addr;
484 void __iomem *lbal_addr;
485 void __iomem *lbam_addr;
486 void __iomem *lbah_addr;
487 void __iomem *device_addr;
488 void __iomem *status_addr;
489 void __iomem *command_addr;
490 void __iomem *altstatus_addr;
491 void __iomem *ctl_addr;
492 void __iomem *bmdma_addr;
493 void __iomem *scr_addr;
494 };
495 #endif /* CONFIG_ATA_SFF */
496
497 struct ata_host {
498 spinlock_t lock;
499 struct device *dev;
500 void __iomem * const *iomap;
501 unsigned int n_ports;
502 void *private_data;
503 struct ata_port_operations *ops;
504 unsigned long flags;
505 #ifdef CONFIG_ATA_ACPI
506 acpi_handle acpi_handle;
507 #endif
508 struct ata_port *simplex_claimed; /* channel owning the DMA */
509 struct ata_port *ports[0];
510 };
511
512 struct ata_queued_cmd {
513 struct ata_port *ap;
514 struct ata_device *dev;
515
516 struct scsi_cmnd *scsicmd;
517 void (*scsidone)(struct scsi_cmnd *);
518
519 struct ata_taskfile tf;
520 u8 cdb[ATAPI_CDB_LEN];
521
522 unsigned long flags; /* ATA_QCFLAG_xxx */
523 unsigned int tag;
524 unsigned int n_elem;
525
526 int dma_dir;
527
528 unsigned int sect_size;
529
530 unsigned int nbytes;
531 unsigned int extrabytes;
532 unsigned int curbytes;
533
534 struct scatterlist *cursg;
535 unsigned int cursg_ofs;
536
537 struct scatterlist sgent;
538
539 struct scatterlist *sg;
540
541 unsigned int err_mask;
542 struct ata_taskfile result_tf;
543 ata_qc_cb_t complete_fn;
544
545 void *private_data;
546 void *lldd_task;
547 };
548
549 struct ata_port_stats {
550 unsigned long unhandled_irq;
551 unsigned long idle_irq;
552 unsigned long rw_reqbuf;
553 };
554
555 struct ata_ering_entry {
556 unsigned int eflags;
557 unsigned int err_mask;
558 u64 timestamp;
559 };
560
561 struct ata_ering {
562 int cursor;
563 struct ata_ering_entry ring[ATA_ERING_SIZE];
564 };
565
566 struct ata_device {
567 struct ata_link *link;
568 unsigned int devno; /* 0 or 1 */
569 unsigned int horkage; /* List of broken features */
570 unsigned long flags; /* ATA_DFLAG_xxx */
571 struct scsi_device *sdev; /* attached SCSI device */
572 #ifdef CONFIG_ATA_ACPI
573 acpi_handle acpi_handle;
574 union acpi_object *gtf_cache;
575 #endif
576 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
577 u64 n_sectors; /* size of device, if ATA */
578 unsigned int class; /* ATA_DEV_xxx */
579 unsigned long unpark_deadline;
580
581 u8 pio_mode;
582 u8 dma_mode;
583 u8 xfer_mode;
584 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
585
586 unsigned int multi_count; /* sectors count for
587 READ/WRITE MULTIPLE */
588 unsigned int max_sectors; /* per-device max sectors */
589 unsigned int cdb_len;
590
591 /* per-dev xfer mask */
592 unsigned long pio_mask;
593 unsigned long mwdma_mask;
594 unsigned long udma_mask;
595
596 /* for CHS addressing */
597 u16 cylinders; /* Number of cylinders */
598 u16 heads; /* Number of heads */
599 u16 sectors; /* Number of sectors per track */
600
601 /* error history */
602 int spdn_cnt;
603 struct ata_ering ering;
604
605 union {
606 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
607 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
608 };
609 };
610
611 /* Offset into struct ata_device. Fields above it are maintained
612 * acress device init. Fields below are zeroed.
613 */
614 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
615
616 struct ata_eh_info {
617 struct ata_device *dev; /* offending device */
618 u32 serror; /* SError from LLDD */
619 unsigned int err_mask; /* port-wide err_mask */
620 unsigned int action; /* ATA_EH_* action mask */
621 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
622 unsigned int flags; /* ATA_EHI_* flags */
623
624 unsigned int probe_mask;
625
626 char desc[ATA_EH_DESC_LEN];
627 int desc_len;
628 };
629
630 struct ata_eh_context {
631 struct ata_eh_info i;
632 int tries[ATA_MAX_DEVICES];
633 int cmd_timeout_idx[ATA_MAX_DEVICES]
634 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
635 unsigned int classes[ATA_MAX_DEVICES];
636 unsigned int did_probe_mask;
637 unsigned int unloaded_mask;
638 unsigned int saved_ncq_enabled;
639 u8 saved_xfer_mode[ATA_MAX_DEVICES];
640 /* timestamp for the last reset attempt or success */
641 unsigned long last_reset;
642 };
643
644 struct ata_acpi_drive
645 {
646 u32 pio;
647 u32 dma;
648 } __packed;
649
650 struct ata_acpi_gtm {
651 struct ata_acpi_drive drive[2];
652 u32 flags;
653 } __packed;
654
655 struct ata_link {
656 struct ata_port *ap;
657 int pmp; /* port multiplier port # */
658
659 unsigned int active_tag; /* active tag on this link */
660 u32 sactive; /* active NCQ commands */
661
662 unsigned int flags; /* ATA_LFLAG_xxx */
663
664 u32 saved_scontrol; /* SControl on probe */
665 unsigned int hw_sata_spd_limit;
666 unsigned int sata_spd_limit;
667 unsigned int sata_spd; /* current SATA PHY speed */
668
669 /* record runtime error info, protected by host_set lock */
670 struct ata_eh_info eh_info;
671 /* EH context */
672 struct ata_eh_context eh_context;
673
674 struct ata_device device[ATA_MAX_DEVICES];
675 };
676
677 struct ata_port {
678 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
679 struct ata_port_operations *ops;
680 spinlock_t *lock;
681 unsigned long flags; /* ATA_FLAG_xxx */
682 unsigned int pflags; /* ATA_PFLAG_xxx */
683 unsigned int print_id; /* user visible unique port ID */
684 unsigned int port_no; /* 0 based port no. inside the host */
685
686 struct ata_prd *prd; /* our SG list */
687 dma_addr_t prd_dma; /* and its DMA mapping */
688
689 #ifdef CONFIG_ATA_SFF
690 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
691 #endif /* CONFIG_ATA_SFF */
692
693 u8 ctl; /* cache of ATA control register */
694 u8 last_ctl; /* Cache last written value */
695 unsigned int pio_mask;
696 unsigned int mwdma_mask;
697 unsigned int udma_mask;
698 unsigned int cbl; /* cable type; ATA_CBL_xxx */
699
700 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
701 unsigned int qc_active;
702 int nr_active_links; /* #links with active qcs */
703
704 struct ata_link link; /* host default link */
705 struct ata_link *slave_link; /* see ata_slave_link_init() */
706
707 int nr_pmp_links; /* nr of available PMP links */
708 struct ata_link *pmp_link; /* array of PMP links */
709 struct ata_link *excl_link; /* for PMP qc exclusion */
710
711 struct ata_port_stats stats;
712 struct ata_host *host;
713 struct device *dev;
714
715 void *port_task_data;
716 struct delayed_work port_task;
717 struct delayed_work hotplug_task;
718 struct work_struct scsi_rescan_task;
719
720 unsigned int hsm_task_state;
721
722 u32 msg_enable;
723 struct list_head eh_done_q;
724 wait_queue_head_t eh_wait_q;
725 int eh_tries;
726 struct completion park_req_pending;
727
728 pm_message_t pm_mesg;
729 int *pm_result;
730 enum link_pm pm_policy;
731
732 struct timer_list fastdrain_timer;
733 unsigned long fastdrain_cnt;
734
735 int em_message_type;
736 void *private_data;
737
738 #ifdef CONFIG_ATA_ACPI
739 acpi_handle acpi_handle;
740 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
741 #endif
742 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
743 };
744
745 /* The following initializer overrides a method to NULL whether one of
746 * its parent has the method defined or not. This is equivalent to
747 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
748 * expression and thus can't be used as an initializer.
749 */
750 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
751
752 struct ata_port_operations {
753 /*
754 * Command execution
755 */
756 int (*qc_defer)(struct ata_queued_cmd *qc);
757 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
758 void (*qc_prep)(struct ata_queued_cmd *qc);
759 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
760 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
761
762 /*
763 * Configuration and exception handling
764 */
765 int (*cable_detect)(struct ata_port *ap);
766 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
767 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
768 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
769 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
770 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
771
772 void (*dev_config)(struct ata_device *dev);
773
774 void (*freeze)(struct ata_port *ap);
775 void (*thaw)(struct ata_port *ap);
776 ata_prereset_fn_t prereset;
777 ata_reset_fn_t softreset;
778 ata_reset_fn_t hardreset;
779 ata_postreset_fn_t postreset;
780 ata_prereset_fn_t pmp_prereset;
781 ata_reset_fn_t pmp_softreset;
782 ata_reset_fn_t pmp_hardreset;
783 ata_postreset_fn_t pmp_postreset;
784 void (*error_handler)(struct ata_port *ap);
785 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
786
787 /*
788 * Optional features
789 */
790 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
791 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
792 void (*pmp_attach)(struct ata_port *ap);
793 void (*pmp_detach)(struct ata_port *ap);
794 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
795 void (*disable_pm)(struct ata_port *ap);
796
797 /*
798 * Start, stop, suspend and resume
799 */
800 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
801 int (*port_resume)(struct ata_port *ap);
802 int (*port_start)(struct ata_port *ap);
803 void (*port_stop)(struct ata_port *ap);
804 void (*host_stop)(struct ata_host *host);
805
806 #ifdef CONFIG_ATA_SFF
807 /*
808 * SFF / taskfile oriented ops
809 */
810 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
811 u8 (*sff_check_status)(struct ata_port *ap);
812 u8 (*sff_check_altstatus)(struct ata_port *ap);
813 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
814 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
815 void (*sff_exec_command)(struct ata_port *ap,
816 const struct ata_taskfile *tf);
817 unsigned int (*sff_data_xfer)(struct ata_device *dev,
818 unsigned char *buf, unsigned int buflen, int rw);
819 u8 (*sff_irq_on)(struct ata_port *);
820 void (*sff_irq_clear)(struct ata_port *);
821
822 void (*bmdma_setup)(struct ata_queued_cmd *qc);
823 void (*bmdma_start)(struct ata_queued_cmd *qc);
824 void (*bmdma_stop)(struct ata_queued_cmd *qc);
825 u8 (*bmdma_status)(struct ata_port *ap);
826 #endif /* CONFIG_ATA_SFF */
827
828 ssize_t (*em_show)(struct ata_port *ap, char *buf);
829 ssize_t (*em_store)(struct ata_port *ap, const char *message,
830 size_t size);
831 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
832 ssize_t (*sw_activity_store)(struct ata_device *dev,
833 enum sw_activity val);
834 /*
835 * Obsolete
836 */
837 void (*phy_reset)(struct ata_port *ap);
838 void (*eng_timeout)(struct ata_port *ap);
839
840 /*
841 * ->inherits must be the last field and all the preceding
842 * fields must be pointers.
843 */
844 const struct ata_port_operations *inherits;
845 };
846
847 struct ata_port_info {
848 unsigned long flags;
849 unsigned long link_flags;
850 unsigned long pio_mask;
851 unsigned long mwdma_mask;
852 unsigned long udma_mask;
853 struct ata_port_operations *port_ops;
854 void *private_data;
855 };
856
857 struct ata_timing {
858 unsigned short mode; /* ATA mode */
859 unsigned short setup; /* t1 */
860 unsigned short act8b; /* t2 for 8-bit I/O */
861 unsigned short rec8b; /* t2i for 8-bit I/O */
862 unsigned short cyc8b; /* t0 for 8-bit I/O */
863 unsigned short active; /* t2 or tD */
864 unsigned short recover; /* t2i or tK */
865 unsigned short cycle; /* t0 */
866 unsigned short udma; /* t2CYCTYP/2 */
867 };
868
869 /*
870 * Core layer - drivers/ata/libata-core.c
871 */
872 extern const unsigned long sata_deb_timing_normal[];
873 extern const unsigned long sata_deb_timing_hotplug[];
874 extern const unsigned long sata_deb_timing_long[];
875
876 extern struct ata_port_operations ata_dummy_port_ops;
877 extern const struct ata_port_info ata_dummy_port_info;
878
879 static inline const unsigned long *
880 sata_ehc_deb_timing(struct ata_eh_context *ehc)
881 {
882 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
883 return sata_deb_timing_hotplug;
884 else
885 return sata_deb_timing_normal;
886 }
887
888 static inline int ata_port_is_dummy(struct ata_port *ap)
889 {
890 return ap->ops == &ata_dummy_port_ops;
891 }
892
893 extern void ata_port_probe(struct ata_port *);
894 extern int sata_set_spd(struct ata_link *link);
895 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
896 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
897 int (*check_ready)(struct ata_link *link));
898 extern int sata_link_debounce(struct ata_link *link,
899 const unsigned long *params, unsigned long deadline);
900 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
901 unsigned long deadline);
902 extern int sata_link_hardreset(struct ata_link *link,
903 const unsigned long *timing, unsigned long deadline,
904 bool *online, int (*check_ready)(struct ata_link *));
905 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
906 unsigned long deadline);
907 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
908 extern void ata_port_disable(struct ata_port *);
909
910 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
911 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
912 const struct ata_port_info * const * ppi, int n_ports);
913 extern int ata_slave_link_init(struct ata_port *ap);
914 extern int ata_host_start(struct ata_host *host);
915 extern int ata_host_register(struct ata_host *host,
916 struct scsi_host_template *sht);
917 extern int ata_host_activate(struct ata_host *host, int irq,
918 irq_handler_t irq_handler, unsigned long irq_flags,
919 struct scsi_host_template *sht);
920 extern void ata_host_detach(struct ata_host *host);
921 extern void ata_host_init(struct ata_host *, struct device *,
922 unsigned long, struct ata_port_operations *);
923 extern int ata_scsi_detect(struct scsi_host_template *sht);
924 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
925 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
926 extern void ata_sas_port_destroy(struct ata_port *);
927 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
928 struct ata_port_info *, struct Scsi_Host *);
929 extern int ata_sas_port_init(struct ata_port *);
930 extern int ata_sas_port_start(struct ata_port *ap);
931 extern void ata_sas_port_stop(struct ata_port *ap);
932 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
933 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
934 struct ata_port *ap);
935 extern int sata_scr_valid(struct ata_link *link);
936 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
937 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
938 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
939 extern bool ata_link_online(struct ata_link *link);
940 extern bool ata_link_offline(struct ata_link *link);
941 #ifdef CONFIG_PM
942 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
943 extern void ata_host_resume(struct ata_host *host);
944 #endif
945 extern int ata_ratelimit(void);
946 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
947 unsigned long interval, unsigned long timeout);
948 extern int atapi_cmd_type(u8 opcode);
949 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
950 u8 pmp, int is_cmd, u8 *fis);
951 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
952 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
953 unsigned long mwdma_mask, unsigned long udma_mask);
954 extern void ata_unpack_xfermask(unsigned long xfer_mask,
955 unsigned long *pio_mask, unsigned long *mwdma_mask,
956 unsigned long *udma_mask);
957 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
958 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
959 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
960 extern const char *ata_mode_string(unsigned long xfer_mask);
961 extern unsigned long ata_id_xfermask(const u16 *id);
962 extern int ata_port_start(struct ata_port *ap);
963 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
964 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
965 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
966 unsigned int n_elem);
967 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
968 extern void ata_dev_disable(struct ata_device *adev);
969 extern void ata_id_string(const u16 *id, unsigned char *s,
970 unsigned int ofs, unsigned int len);
971 extern void ata_id_c_string(const u16 *id, unsigned char *s,
972 unsigned int ofs, unsigned int len);
973 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
974 struct ata_taskfile *tf, u16 *id);
975 extern void ata_qc_complete(struct ata_queued_cmd *qc);
976 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
977 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
978 void (*done)(struct scsi_cmnd *));
979 extern int ata_std_bios_param(struct scsi_device *sdev,
980 struct block_device *bdev,
981 sector_t capacity, int geom[]);
982 extern int ata_scsi_slave_config(struct scsi_device *sdev);
983 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
984 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
985 int queue_depth);
986 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
987 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
988
989 extern int ata_cable_40wire(struct ata_port *ap);
990 extern int ata_cable_80wire(struct ata_port *ap);
991 extern int ata_cable_sata(struct ata_port *ap);
992 extern int ata_cable_ignore(struct ata_port *ap);
993 extern int ata_cable_unknown(struct ata_port *ap);
994
995 /* Timing helpers */
996 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
997 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
998 extern int ata_timing_compute(struct ata_device *, unsigned short,
999 struct ata_timing *, int, int);
1000 extern void ata_timing_merge(const struct ata_timing *,
1001 const struct ata_timing *, struct ata_timing *,
1002 unsigned int);
1003 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1004
1005 /* PCI */
1006 #ifdef CONFIG_PCI
1007 struct pci_dev;
1008
1009 struct pci_bits {
1010 unsigned int reg; /* PCI config register to read */
1011 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1012 unsigned long mask;
1013 unsigned long val;
1014 };
1015
1016 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1017 extern void ata_pci_remove_one(struct pci_dev *pdev);
1018
1019 #ifdef CONFIG_PM
1020 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1021 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1022 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1023 extern int ata_pci_device_resume(struct pci_dev *pdev);
1024 #endif /* CONFIG_PM */
1025 #endif /* CONFIG_PCI */
1026
1027 /*
1028 * ACPI - drivers/ata/libata-acpi.c
1029 */
1030 #ifdef CONFIG_ATA_ACPI
1031 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1032 {
1033 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1034 return &ap->__acpi_init_gtm;
1035 return NULL;
1036 }
1037 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1038 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1039 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1040 const struct ata_acpi_gtm *gtm);
1041 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1042 #else
1043 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1044 {
1045 return NULL;
1046 }
1047
1048 static inline int ata_acpi_stm(const struct ata_port *ap,
1049 struct ata_acpi_gtm *stm)
1050 {
1051 return -ENOSYS;
1052 }
1053
1054 static inline int ata_acpi_gtm(const struct ata_port *ap,
1055 struct ata_acpi_gtm *stm)
1056 {
1057 return -ENOSYS;
1058 }
1059
1060 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1061 const struct ata_acpi_gtm *gtm)
1062 {
1063 return 0;
1064 }
1065
1066 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1067 const struct ata_acpi_gtm *gtm)
1068 {
1069 return 0;
1070 }
1071 #endif
1072
1073 /*
1074 * EH - drivers/ata/libata-eh.c
1075 */
1076 extern void ata_port_schedule_eh(struct ata_port *ap);
1077 extern int ata_link_abort(struct ata_link *link);
1078 extern int ata_port_abort(struct ata_port *ap);
1079 extern int ata_port_freeze(struct ata_port *ap);
1080 extern int sata_async_notification(struct ata_port *ap);
1081
1082 extern void ata_eh_freeze_port(struct ata_port *ap);
1083 extern void ata_eh_thaw_port(struct ata_port *ap);
1084
1085 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1086 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1087 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1088
1089 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1090 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1091 ata_postreset_fn_t postreset);
1092 extern void ata_std_error_handler(struct ata_port *ap);
1093
1094 /*
1095 * Base operations to inherit from and initializers for sht
1096 *
1097 * Operations
1098 *
1099 * base : Common to all libata drivers.
1100 * sata : SATA controllers w/ native interface.
1101 * pmp : SATA controllers w/ PMP support.
1102 * sff : SFF ATA controllers w/o BMDMA support.
1103 * bmdma : SFF ATA controllers w/ BMDMA support.
1104 *
1105 * sht initializers
1106 *
1107 * BASE : Common to all libata drivers. The user must set
1108 * sg_tablesize and dma_boundary.
1109 * PIO : SFF ATA controllers w/ only PIO support.
1110 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1111 * dma_boundary are set to BMDMA limits.
1112 * NCQ : SATA controllers supporting NCQ. The user must set
1113 * sg_tablesize, dma_boundary and can_queue.
1114 */
1115 extern const struct ata_port_operations ata_base_port_ops;
1116 extern const struct ata_port_operations sata_port_ops;
1117 extern struct device_attribute *ata_common_sdev_attrs[];
1118
1119 #define ATA_BASE_SHT(drv_name) \
1120 .module = THIS_MODULE, \
1121 .name = drv_name, \
1122 .ioctl = ata_scsi_ioctl, \
1123 .queuecommand = ata_scsi_queuecmd, \
1124 .can_queue = ATA_DEF_QUEUE, \
1125 .this_id = ATA_SHT_THIS_ID, \
1126 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1127 .emulated = ATA_SHT_EMULATED, \
1128 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1129 .proc_name = drv_name, \
1130 .slave_configure = ata_scsi_slave_config, \
1131 .slave_destroy = ata_scsi_slave_destroy, \
1132 .bios_param = ata_std_bios_param, \
1133 .sdev_attrs = ata_common_sdev_attrs
1134
1135 #define ATA_NCQ_SHT(drv_name) \
1136 ATA_BASE_SHT(drv_name), \
1137 .change_queue_depth = ata_scsi_change_queue_depth
1138
1139 /*
1140 * PMP helpers
1141 */
1142 #ifdef CONFIG_SATA_PMP
1143 static inline bool sata_pmp_supported(struct ata_port *ap)
1144 {
1145 return ap->flags & ATA_FLAG_PMP;
1146 }
1147
1148 static inline bool sata_pmp_attached(struct ata_port *ap)
1149 {
1150 return ap->nr_pmp_links != 0;
1151 }
1152
1153 static inline int ata_is_host_link(const struct ata_link *link)
1154 {
1155 return link == &link->ap->link || link == link->ap->slave_link;
1156 }
1157 #else /* CONFIG_SATA_PMP */
1158 static inline bool sata_pmp_supported(struct ata_port *ap)
1159 {
1160 return false;
1161 }
1162
1163 static inline bool sata_pmp_attached(struct ata_port *ap)
1164 {
1165 return false;
1166 }
1167
1168 static inline int ata_is_host_link(const struct ata_link *link)
1169 {
1170 return 1;
1171 }
1172 #endif /* CONFIG_SATA_PMP */
1173
1174 static inline int sata_srst_pmp(struct ata_link *link)
1175 {
1176 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1177 return SATA_PMP_CTRL_PORT;
1178 return link->pmp;
1179 }
1180
1181 /*
1182 * printk helpers
1183 */
1184 #define ata_port_printk(ap, lv, fmt, args...) \
1185 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1186
1187 #define ata_link_printk(link, lv, fmt, args...) do { \
1188 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1189 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1190 (link)->pmp , ##args); \
1191 else \
1192 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1193 } while(0)
1194
1195 #define ata_dev_printk(dev, lv, fmt, args...) \
1196 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1197 (dev)->link->pmp + (dev)->devno , ##args)
1198
1199 /*
1200 * ata_eh_info helpers
1201 */
1202 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1203 __attribute__ ((format (printf, 2, 3)));
1204 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1205 __attribute__ ((format (printf, 2, 3)));
1206 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1207
1208 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1209 {
1210 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1211 ehi->flags |= ATA_EHI_HOTPLUGGED;
1212 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1213 ehi->err_mask |= AC_ERR_ATA_BUS;
1214 }
1215
1216 /*
1217 * port description helpers
1218 */
1219 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1220 __attribute__ ((format (printf, 2, 3)));
1221 #ifdef CONFIG_PCI
1222 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1223 const char *name);
1224 #endif
1225
1226 static inline unsigned int ata_tag_valid(unsigned int tag)
1227 {
1228 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1229 }
1230
1231 static inline unsigned int ata_tag_internal(unsigned int tag)
1232 {
1233 return tag == ATA_TAG_INTERNAL;
1234 }
1235
1236 /*
1237 * device helpers
1238 */
1239 static inline unsigned int ata_class_enabled(unsigned int class)
1240 {
1241 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1242 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1243 }
1244
1245 static inline unsigned int ata_class_disabled(unsigned int class)
1246 {
1247 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1248 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1249 }
1250
1251 static inline unsigned int ata_class_absent(unsigned int class)
1252 {
1253 return !ata_class_enabled(class) && !ata_class_disabled(class);
1254 }
1255
1256 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1257 {
1258 return ata_class_enabled(dev->class);
1259 }
1260
1261 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1262 {
1263 return ata_class_disabled(dev->class);
1264 }
1265
1266 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1267 {
1268 return ata_class_absent(dev->class);
1269 }
1270
1271 /*
1272 * link helpers
1273 */
1274 static inline int ata_link_max_devices(const struct ata_link *link)
1275 {
1276 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1277 return 2;
1278 return 1;
1279 }
1280
1281 static inline int ata_link_active(struct ata_link *link)
1282 {
1283 return ata_tag_valid(link->active_tag) || link->sactive;
1284 }
1285
1286 extern struct ata_link *__ata_port_next_link(struct ata_port *ap,
1287 struct ata_link *link,
1288 bool dev_only);
1289
1290 #define __ata_port_for_each_link(link, ap) \
1291 for ((link) = __ata_port_next_link((ap), NULL, false); (link); \
1292 (link) = __ata_port_next_link((ap), (link), false))
1293
1294 #define ata_port_for_each_link(link, ap) \
1295 for ((link) = __ata_port_next_link((ap), NULL, true); (link); \
1296 (link) = __ata_port_next_link((ap), (link), true))
1297
1298 #define ata_link_for_each_dev(dev, link) \
1299 for ((dev) = (link)->device; \
1300 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1301 (dev)++)
1302
1303 #define ata_link_for_each_dev_reverse(dev, link) \
1304 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1305 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1306
1307 /**
1308 * ata_ncq_enabled - Test whether NCQ is enabled
1309 * @dev: ATA device to test for
1310 *
1311 * LOCKING:
1312 * spin_lock_irqsave(host lock)
1313 *
1314 * RETURNS:
1315 * 1 if NCQ is enabled for @dev, 0 otherwise.
1316 */
1317 static inline int ata_ncq_enabled(struct ata_device *dev)
1318 {
1319 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1320 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1321 }
1322
1323 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1324 {
1325 qc->tf.ctl |= ATA_NIEN;
1326 }
1327
1328 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1329 unsigned int tag)
1330 {
1331 if (likely(ata_tag_valid(tag)))
1332 return &ap->qcmd[tag];
1333 return NULL;
1334 }
1335
1336 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1337 unsigned int tag)
1338 {
1339 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1340
1341 if (unlikely(!qc) || !ap->ops->error_handler)
1342 return qc;
1343
1344 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1345 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1346 return qc;
1347
1348 return NULL;
1349 }
1350
1351 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1352 {
1353 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1354 }
1355
1356 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1357 {
1358 memset(tf, 0, sizeof(*tf));
1359
1360 tf->ctl = dev->link->ap->ctl;
1361 if (dev->devno == 0)
1362 tf->device = ATA_DEVICE_OBS;
1363 else
1364 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1365 }
1366
1367 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1368 {
1369 qc->dma_dir = DMA_NONE;
1370 qc->sg = NULL;
1371 qc->flags = 0;
1372 qc->cursg = NULL;
1373 qc->cursg_ofs = 0;
1374 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1375 qc->n_elem = 0;
1376 qc->err_mask = 0;
1377 qc->sect_size = ATA_SECT_SIZE;
1378
1379 ata_tf_init(qc->dev, &qc->tf);
1380
1381 /* init result_tf such that it indicates normal completion */
1382 qc->result_tf.command = ATA_DRDY;
1383 qc->result_tf.feature = 0;
1384 }
1385
1386 static inline int ata_try_flush_cache(const struct ata_device *dev)
1387 {
1388 return ata_id_wcache_enabled(dev->id) ||
1389 ata_id_has_flush(dev->id) ||
1390 ata_id_has_flush_ext(dev->id);
1391 }
1392
1393 static inline unsigned int ac_err_mask(u8 status)
1394 {
1395 if (status & (ATA_BUSY | ATA_DRQ))
1396 return AC_ERR_HSM;
1397 if (status & (ATA_ERR | ATA_DF))
1398 return AC_ERR_DEV;
1399 return 0;
1400 }
1401
1402 static inline unsigned int __ac_err_mask(u8 status)
1403 {
1404 unsigned int mask = ac_err_mask(status);
1405 if (mask == 0)
1406 return AC_ERR_OTHER;
1407 return mask;
1408 }
1409
1410 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1411 {
1412 return *(struct ata_port **)&host->hostdata[0];
1413 }
1414
1415 static inline int ata_check_ready(u8 status)
1416 {
1417 if (!(status & ATA_BUSY))
1418 return 1;
1419
1420 /* 0xff indicates either no device or device not ready */
1421 if (status == 0xff)
1422 return -ENODEV;
1423
1424 return 0;
1425 }
1426
1427 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1428 unsigned long timeout_msecs)
1429 {
1430 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1431 }
1432
1433 /* Don't open code these in drivers as there are traps. Firstly the range may
1434 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1435 > UDMA_0. Dyma ddreigiau */
1436
1437 static inline int ata_using_mwdma(struct ata_device *adev)
1438 {
1439 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1440 return 1;
1441 return 0;
1442 }
1443
1444 static inline int ata_using_udma(struct ata_device *adev)
1445 {
1446 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1447 return 1;
1448 return 0;
1449 }
1450
1451 static inline int ata_dma_enabled(struct ata_device *adev)
1452 {
1453 return (adev->dma_mode == 0xFF ? 0 : 1);
1454 }
1455
1456 /**************************************************************************
1457 * PMP - drivers/ata/libata-pmp.c
1458 */
1459 #ifdef CONFIG_SATA_PMP
1460
1461 extern const struct ata_port_operations sata_pmp_port_ops;
1462
1463 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1464 extern void sata_pmp_error_handler(struct ata_port *ap);
1465
1466 #else /* CONFIG_SATA_PMP */
1467
1468 #define sata_pmp_port_ops sata_port_ops
1469 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1470 #define sata_pmp_error_handler ata_std_error_handler
1471
1472 #endif /* CONFIG_SATA_PMP */
1473
1474
1475 /**************************************************************************
1476 * SFF - drivers/ata/libata-sff.c
1477 */
1478 #ifdef CONFIG_ATA_SFF
1479
1480 extern const struct ata_port_operations ata_sff_port_ops;
1481 extern const struct ata_port_operations ata_bmdma_port_ops;
1482
1483 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1484 #define ATA_PIO_SHT(drv_name) \
1485 ATA_BASE_SHT(drv_name), \
1486 .sg_tablesize = LIBATA_MAX_PRD, \
1487 .dma_boundary = ATA_DMA_BOUNDARY
1488
1489 #define ATA_BMDMA_SHT(drv_name) \
1490 ATA_BASE_SHT(drv_name), \
1491 .sg_tablesize = LIBATA_MAX_PRD, \
1492 .dma_boundary = ATA_DMA_BOUNDARY
1493
1494 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1495 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1496 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1497 extern u8 ata_sff_check_status(struct ata_port *ap);
1498 extern void ata_sff_pause(struct ata_port *ap);
1499 extern void ata_sff_dma_pause(struct ata_port *ap);
1500 extern int ata_sff_busy_sleep(struct ata_port *ap,
1501 unsigned long timeout_pat, unsigned long timeout);
1502 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1503 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1504 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1505 extern void ata_sff_exec_command(struct ata_port *ap,
1506 const struct ata_taskfile *tf);
1507 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1508 unsigned char *buf, unsigned int buflen, int rw);
1509 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1510 unsigned char *buf, unsigned int buflen, int rw);
1511 extern u8 ata_sff_irq_on(struct ata_port *ap);
1512 extern void ata_sff_irq_clear(struct ata_port *ap);
1513 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1514 u8 status, int in_wq);
1515 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1516 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1517 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1518 struct ata_queued_cmd *qc);
1519 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1520 extern void ata_sff_freeze(struct ata_port *ap);
1521 extern void ata_sff_thaw(struct ata_port *ap);
1522 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1523 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1524 u8 *r_err);
1525 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1526 unsigned long deadline);
1527 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1528 unsigned long deadline);
1529 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1530 unsigned long deadline);
1531 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1532 extern void ata_sff_error_handler(struct ata_port *ap);
1533 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1534 extern int ata_sff_port_start(struct ata_port *ap);
1535 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1536 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1537 unsigned long xfer_mask);
1538 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1539 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1540 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1541 extern u8 ata_bmdma_status(struct ata_port *ap);
1542 extern void ata_bus_reset(struct ata_port *ap);
1543
1544 #ifdef CONFIG_PCI
1545 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1546 extern int ata_pci_bmdma_init(struct ata_host *host);
1547 extern int ata_pci_sff_init_host(struct ata_host *host);
1548 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1549 const struct ata_port_info * const * ppi,
1550 struct ata_host **r_host);
1551 extern int ata_pci_sff_activate_host(struct ata_host *host,
1552 irq_handler_t irq_handler,
1553 struct scsi_host_template *sht);
1554 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1555 const struct ata_port_info * const * ppi,
1556 struct scsi_host_template *sht, void *host_priv);
1557 #endif /* CONFIG_PCI */
1558
1559 /**
1560 * ata_sff_busy_wait - Wait for a port status register
1561 * @ap: Port to wait for.
1562 * @bits: bits that must be clear
1563 * @max: number of 10uS waits to perform
1564 *
1565 * Waits up to max*10 microseconds for the selected bits in the port's
1566 * status register to be cleared.
1567 * Returns final value of status register.
1568 *
1569 * LOCKING:
1570 * Inherited from caller.
1571 */
1572 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1573 unsigned int max)
1574 {
1575 u8 status;
1576
1577 do {
1578 udelay(10);
1579 status = ap->ops->sff_check_status(ap);
1580 max--;
1581 } while (status != 0xff && (status & bits) && (max > 0));
1582
1583 return status;
1584 }
1585
1586 /**
1587 * ata_wait_idle - Wait for a port to be idle.
1588 * @ap: Port to wait for.
1589 *
1590 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1591 * Returns final value of status register.
1592 *
1593 * LOCKING:
1594 * Inherited from caller.
1595 */
1596 static inline u8 ata_wait_idle(struct ata_port *ap)
1597 {
1598 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1599
1600 #ifdef ATA_DEBUG
1601 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1602 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1603 status);
1604 #endif
1605
1606 return status;
1607 }
1608 #endif /* CONFIG_ATA_SFF */
1609
1610 #endif /* __LINUX_LIBATA_H__ */
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