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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * 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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 */
25
26#ifndef __LINUX_LIBATA_H__
27#define __LINUX_LIBATA_H__
28
29#include <linux/delay.h>
30#include <linux/interrupt.h>
Andrew Morton1c72d8d2005-11-10 16:21:38 -080031#include <linux/dma-mapping.h>
Jens Axboe87260212007-10-16 11:14:12 +020032#include <linux/scatterlist.h>
Tejun Heof0d36ef2007-01-20 16:00:28 +090033#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/ata.h>
35#include <linux/workqueue.h>
Jeff Garzik35bb94b2006-04-11 13:12:34 -040036#include <scsi/scsi_host.h>
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070037#include <linux/acpi.h>
Tejun Heoceb0c642007-12-05 16:43:06 +090038#include <linux/cdrom.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Jeff Garzika6d967a2006-09-25 15:33:09 -040040/*
41 * Define if arch has non-standard setup. This is a _PCI_ standard
42 * not a legacy or ISA standard.
43 */
44#ifdef CONFIG_ATA_NONSTANDARD
Alan Cox2ec7df02006-08-10 16:59:10 +090045#include <asm/libata-portmap.h>
Jeff Garzika6d967a2006-09-25 15:33:09 -040046#else
47#include <asm-generic/libata-portmap.h>
48#endif
Alan Cox2ec7df02006-08-10 16:59:10 +090049
Linus Torvalds1da177e2005-04-16 15:20:36 -070050/*
Randy Dunlapbfd60572006-01-17 19:34:42 -050051 * compile-time options: to be removed as soon as all the drivers are
52 * converted to the new debugging mechanism
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 */
54#undef ATA_DEBUG /* debugging output */
55#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
56#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
57#undef ATA_NDEBUG /* define to disable quick runtime checks */
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59
60/* note: prints function name for you */
61#ifdef ATA_DEBUG
62#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
63#ifdef ATA_VERBOSE_DEBUG
64#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65#else
66#define VPRINTK(fmt, args...)
67#endif /* ATA_VERBOSE_DEBUG */
68#else
69#define DPRINTK(fmt, args...)
70#define VPRINTK(fmt, args...)
71#endif /* ATA_DEBUG */
72
Jeff Garzik2c13b7c2005-11-14 14:14:16 -050073#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
74
Randy Dunlapbfd60572006-01-17 19:34:42 -050075/* NEW: debug levels */
76#define HAVE_LIBATA_MSG 1
77
78enum {
79 ATA_MSG_DRV = 0x0001,
80 ATA_MSG_INFO = 0x0002,
81 ATA_MSG_PROBE = 0x0004,
82 ATA_MSG_WARN = 0x0008,
83 ATA_MSG_MALLOC = 0x0010,
84 ATA_MSG_CTL = 0x0020,
85 ATA_MSG_INTR = 0x0040,
86 ATA_MSG_ERR = 0x0080,
87};
88
89#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
90#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
91#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
92#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
93#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
94#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
95#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
96#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
97
98static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
99{
100 if (dval < 0 || dval >= (sizeof(u32) * 8))
101 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
102 if (!dval)
103 return 0;
104 return (1 << dval) - 1;
105}
106
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107/* defines only for the constants which don't work well as enums */
108#define ATA_TAG_POISON 0xfafbfcfdU
109
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110enum {
111 /* various global constants */
112 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
Alan Coxd26fc952007-07-06 19:13:52 -0400113 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 ATA_MAX_PORTS = 8,
115 ATA_DEF_QUEUE = 1,
Tejun Heo2ab7db12006-05-15 20:58:02 +0900116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900117 ATA_MAX_QUEUE = 32,
Tejun Heo2ab7db12006-05-15 20:58:02 +0900118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 ATA_MAX_BUS = 2,
120 ATA_DEF_BUSY_WAIT = 10000,
121 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
122
Tejun Heo140b5e52007-12-12 12:21:52 +0900123 ATAPI_MAX_DRAIN = 16 << 10,
124
Tejun Heob558edd2008-01-24 00:05:14 +0900125 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 ATA_SHT_EMULATED = 1,
128 ATA_SHT_CMD_PER_LUN = 1,
129 ATA_SHT_THIS_ID = -1,
Jeff Garzikcf482932005-10-22 00:19:33 -0400130 ATA_SHT_USE_CLUSTERING = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
132 /* struct ata_device stuff */
Tejun Heo949b38a2006-04-02 18:51:52 +0900133 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
134 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
Jeff Garzik029f5462006-04-02 10:30:40 -0400135 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
Tejun Heo88e49032006-05-15 21:03:38 +0900136 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
Tejun Heo6fc49ad2006-11-11 20:10:45 +0900137 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
Tejun Heo67465442007-05-15 03:28:16 +0900138 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
139 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
Tejun Heo7d77b242007-09-23 13:14:13 +0900140 ATA_DFLAG_AN = (1 << 7), /* AN configured */
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400141 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
142 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
Tejun Heo91163002008-02-21 13:25:50 +0900143 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
Kristen Carlson Accardi25571642007-09-11 11:41:59 -0700144 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
Tejun Heo949b38a2006-04-02 18:51:52 +0900145
Kristen Carlson Accardi25571642007-09-11 11:41:59 -0700146 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
147 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
148 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
Tejun Heo054a5fb2007-10-25 18:30:36 +0900149 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
Tejun Heo00115e02007-11-27 19:28:58 +0900150 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
Tejun Heof20ded32007-11-27 19:28:52 +0900151 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
Tejun Heof20ded32007-11-27 19:28:52 +0900153 ATA_DFLAG_DETACH = (1 << 24),
154 ATA_DFLAG_DETACHED = (1 << 25),
Tejun Heoabdda732006-05-31 18:27:29 +0900155
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 ATA_DEV_UNKNOWN = 0, /* unknown device */
157 ATA_DEV_ATA = 1, /* ATA device */
158 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
159 ATA_DEV_ATAPI = 3, /* ATAPI device */
160 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
Tejun Heoe0a71752007-09-23 13:14:12 +0900161 ATA_DEV_PMP = 5, /* SATA port multiplier */
162 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
163 ATA_DEV_SEMB = 7, /* SEMB */
164 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
165 ATA_DEV_NONE = 9, /* no device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
Tejun Heo0c887582007-08-06 18:36:23 +0900167 /* struct ata_link flags */
Tejun Heoae791c02007-09-23 13:14:12 +0900168 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,
Tejun Heofd995f72007-09-23 13:14:12 +0900172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
Tejun Heof9df58c2007-09-23 13:14:13 +0900173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
Tejun Heo0c887582007-08-06 18:36:23 +0900174
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 /* struct ata_port flags */
Tejun Heo949b38a2006-04-02 18:51:52 +0900176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 /* (doesn't imply presence) */
Tejun Heo949b38a2006-04-02 18:51:52 +0900178 ATA_FLAG_SATA = (1 << 1),
179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
Tejun Heo7395acb2006-05-31 18:27:25 +0900186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
187 * doesn't handle PIO interrupts */
188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
Tejun Heo7395acb2006-05-31 18:27:25 +0900189 ATA_FLAG_DEBUGMSG = (1 << 13),
Tejun Heob2a8bbe2007-01-25 19:40:05 +0900190 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
Alan Coxf834e492007-02-07 13:46:00 -0800191 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
Tejun Heo3cadbcc2007-05-15 03:28:15 +0900192 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
Kristen Carlson Accardi9f45cbd2007-08-15 03:57:11 -0400193 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
Tejun Heoe0a71752007-09-23 13:14:12 +0900194 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400195 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
Jens Axboe9b847542006-01-06 09:28:07 +0100196
Tejun Heob51e9e52006-06-29 01:29:30 +0900197 /* The following flag belongs to ap->pflags but is kept in
198 * ap->flags because it's referenced in many LLDs and will be
199 * removed in not-too-distant future.
200 */
201 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
Tejun Heo9ec957f2006-05-15 20:57:58 +0900202
Tejun Heob51e9e52006-06-29 01:29:30 +0900203 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
Alan Cox8d238e02006-01-17 20:50:31 +0000204
Tejun Heob51e9e52006-06-29 01:29:30 +0900205 /* struct ata_port pflags */
206 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
207 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
208 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
209 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
210 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
211 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
212 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
Tejun Heof4d6d002007-05-01 11:50:15 +0200213 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
Tejun Heoafaa5c32007-10-09 15:06:10 +0900214 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
Tejun Heob51e9e52006-06-29 01:29:30 +0900215
Tejun Heob51e9e52006-06-29 01:29:30 +0900216 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
Tejun Heo500530f2006-07-03 16:07:27 +0900217 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900218 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
Tejun Heodde44582006-02-02 00:56:10 +0900219
Tejun Heo949b38a2006-04-02 18:51:52 +0900220 /* struct ata_queued_cmd flags */
221 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
Tejun Heo001102d2007-12-05 16:43:09 +0900222 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
Tejun Heo27197362006-04-02 18:51:53 +0900223 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
Tejun Heoe61e0672006-05-15 20:57:40 +0900224 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
Tejun Heoda917d62007-09-23 13:14:12 +0900225 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
Tejun Heoe027bd32007-10-26 16:19:26 +0900226 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
Tejun Heo03faab72008-03-27 19:14:24 +0900227 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
Tejun Heoe61e0672006-05-15 20:57:40 +0900228
Tejun Heo9ec957f2006-05-15 20:57:58 +0900229 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
230 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
231 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Alan Cox4e5ec5d2006-03-27 18:42:40 +0100233 /* host set flags */
Jeff Garzikcca39742006-08-24 03:19:22 -0400234 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
Tejun Heoecef7252007-04-17 23:44:06 +0900235 ATA_HOST_STARTED = (1 << 1), /* Host started */
Jeff Garzik9bec2e32006-08-31 00:02:15 -0400236
Tejun Heob8b275e2007-07-10 15:55:43 +0900237 /* bits 24:31 of host->flags are reserved for LLD specific flags */
238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 /* various lengths of time */
Alan Cox8d238e02006-01-17 20:50:31 +0000240 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
241 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
Tejun Heoa2a7a662005-12-13 14:48:31 +0900242 ATA_TMOUT_INTERNAL = 30 * HZ,
243 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Tejun Heo88ff6ea2007-10-16 14:21:24 -0700245 /* FIXME: GoVault needs 2s but we can't afford that without
246 * parallel probing. 800ms is enough for iVDR disk
247 * HHD424020F7SV00. Increase to 2secs when parallel probing
248 * is in place.
249 */
250 ATA_TMOUT_FF_WAIT = 4 * HZ / 5,
251
Tejun Heo705e76b2008-04-07 22:47:19 +0900252 /* Spec mandates to wait for ">= 2ms" before checking status
253 * after reset. We wait 150ms, because that was the magic
254 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
255 * the period of time between when the ATA command register is
256 * written, and then status is checked. Because waiting for
257 * "a while" before checking status is fine, post SRST, we
258 * perform this magic delay here as well.
259 *
260 * Old drivers/ide uses the 2mS rule and then waits for ready.
261 */
262 ATA_WAIT_AFTER_RESET_MSECS = 150,
263
Tejun Heo9dadd452008-04-07 22:47:19 +0900264 /* If PMP is supported, we have to do follow-up SRST. As some
265 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
266 * advised to wait only for the following duration before
267 * doing SRST.
268 */
269 ATA_TMOUT_PMP_SRST_WAIT = 1 * HZ,
270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 /* ATA bus states */
272 BUS_UNKNOWN = 0,
273 BUS_DMA = 1,
274 BUS_IDLE = 2,
275 BUS_NOINTR = 3,
276 BUS_NODATA = 4,
277 BUS_TIMER = 5,
278 BUS_PIO = 6,
279 BUS_EDD = 7,
280 BUS_IDENTIFY = 8,
281 BUS_PACKET = 9,
282
283 /* SATA port states */
284 PORT_UNKNOWN = 0,
285 PORT_ENABLED = 1,
286 PORT_DISABLED = 2,
287
288 /* encoding various smaller bitmaps into a single
Tejun Heo7dc951a2007-11-27 19:43:42 +0900289 * unsigned long bitmap
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 */
Tejun Heo70cd0712007-11-27 19:43:40 +0900291 ATA_NR_PIO_MODES = 7,
292 ATA_NR_MWDMA_MODES = 5,
293 ATA_NR_UDMA_MODES = 8,
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900294
295 ATA_SHIFT_PIO = 0,
Tejun Heo70cd0712007-11-27 19:43:40 +0900296 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
297 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900298
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400299 /* size of buffer to pad xfers ending on unaligned boundaries */
300 ATA_DMA_PAD_SZ = 4,
Tejun Heo949b38a2006-04-02 18:51:52 +0900301
Tejun Heo0c247c52006-05-15 20:58:19 +0900302 /* ering size */
303 ATA_ERING_SIZE = 32,
304
Tejun Heo31cc23b2007-09-23 13:14:12 +0900305 /* return values for ->qc_defer */
306 ATA_DEFER_LINK = 1,
307 ATA_DEFER_PORT = 2,
308
Tejun Heof3e81b12006-05-15 20:58:21 +0900309 /* desc_len for ata_eh_info and context */
310 ATA_EH_DESC_LEN = 80,
311
Tejun Heo9be1e972006-05-15 20:58:17 +0900312 /* reset / recovery action types */
313 ATA_EH_REVALIDATE = (1 << 0),
Tejun Heocf480622008-01-24 00:05:14 +0900314 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
315 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
316 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
Tejun Heof9df58c2007-09-23 13:14:13 +0900317 ATA_EH_ENABLE_LINK = (1 << 3),
Tejun Heo3ec25eb2008-03-27 18:37:14 +0900318 ATA_EH_LPM = (1 << 4), /* link power management action */
Tejun Heo9be1e972006-05-15 20:58:17 +0900319
Tejun Heo9666f402007-05-04 21:27:47 +0200320 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
Tejun Heo9be1e972006-05-15 20:58:17 +0900321
Tejun Heof3e81b12006-05-15 20:58:21 +0900322 /* ata_eh_info->flags */
Tejun Heoabdda732006-05-31 18:27:29 +0900323 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
Tejun Heo1cdaf532006-07-03 16:07:26 +0900324 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
325 ATA_EHI_QUIET = (1 << 3), /* be quiet */
Tejun Heoabdda732006-05-31 18:27:29 +0900326
Tejun Heo0d64a232007-04-23 02:41:05 +0900327 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
328 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
329 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
330 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
331 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
Tejun Heof3e81b12006-05-15 20:58:21 +0900332
Tejun Heo0d64a232007-04-23 02:41:05 +0900333 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
Tejun Heo13abf502006-07-10 23:18:46 +0900334
Tejun Heoa1e10f72007-08-18 13:28:49 +0900335 /* max tries if error condition is still set after ->error_handler */
336 ATA_EH_MAX_TRIES = 5,
Tejun Heoad9e2762006-05-15 20:58:12 +0900337
Tejun Heo14d2bac2006-04-02 17:54:46 +0900338 /* how hard are we gonna try to probe/recover devices */
339 ATA_PROBE_MAX_TRIES = 3,
Tejun Heo022bdb02006-05-15 20:58:22 +0900340 ATA_EH_DEV_TRIES = 3,
Tejun Heoe0a71752007-09-23 13:14:12 +0900341 ATA_EH_PMP_TRIES = 5,
342 ATA_EH_PMP_LINK_TRIES = 3,
343
344 SATA_PMP_SCR_TIMEOUT = 250,
Tejun Heof5914a42006-05-31 18:27:48 +0900345
Alan Cox93590852006-09-12 16:55:12 +0100346 /* Horkage types. May be set by libata or controller on drives
347 (some horkage may be drive/controller pair dependant */
348
349 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
Alan Cox6919a0a2006-10-27 19:08:46 -0700350 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
351 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
Albert Lee18d6e9d2007-04-02 11:34:15 +0800352 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
Tejun Heo16c55b02007-08-29 11:58:33 +0900353 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
Tejun Heoe31e8532007-09-23 13:14:13 +0900354 ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */
Alan Cox93328e12007-09-29 04:06:48 -0400355 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400356 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
Alan Cox6bbfd532007-11-05 22:58:58 +0000357 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
Albert Lee2d3b8ee2007-11-15 10:35:46 +0900358 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
Alan Coxb3a70602007-10-02 12:38:26 -0400359
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400360 /* DMA mask for user DMA control: User visible values; DO NOT
Alan Coxb3a70602007-10-02 12:38:26 -0400361 renumber */
362 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
363 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
364 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
Tejun Heoceb0c642007-12-05 16:43:06 +0900365
366 /* ATAPI command types */
367 ATAPI_READ = 0, /* READs */
368 ATAPI_WRITE = 1, /* WRITEs */
369 ATAPI_READ_CD = 2, /* READ CD [MSF] */
Tejun Heoe52dcc42008-04-02 17:35:19 +0900370 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
371 ATAPI_MISC = 4, /* the rest */
Tejun Heo624d5c52008-03-25 22:16:41 +0900372
373 /* Timing constants */
374 ATA_TIMING_SETUP = (1 << 0),
375 ATA_TIMING_ACT8B = (1 << 1),
376 ATA_TIMING_REC8B = (1 << 2),
377 ATA_TIMING_CYC8B = (1 << 3),
378 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
379 ATA_TIMING_CYC8B,
380 ATA_TIMING_ACTIVE = (1 << 4),
381 ATA_TIMING_RECOVER = (1 << 5),
382 ATA_TIMING_CYCLE = (1 << 6),
383 ATA_TIMING_UDMA = (1 << 7),
384 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
385 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
386 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
387 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388};
389
Tejun Heo7dc951a2007-11-27 19:43:42 +0900390enum ata_xfer_mask {
391 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
392 << ATA_SHIFT_PIO,
393 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
394 << ATA_SHIFT_MWDMA,
395 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
396 << ATA_SHIFT_UDMA,
397};
398
Albert Lee14be71f2005-09-27 17:36:35 +0800399enum hsm_task_states {
Albert Leec56b14d2005-09-30 19:07:39 +0800400 HSM_ST_IDLE, /* no command on going */
Albert Lee71527642007-04-02 11:28:52 +0800401 HSM_ST_FIRST, /* (waiting the device to)
402 write CDB or first data block */
Albert Leec56b14d2005-09-30 19:07:39 +0800403 HSM_ST, /* (waiting the device to) transfer data */
404 HSM_ST_LAST, /* (waiting the device to) complete command */
Albert Leec56b14d2005-09-30 19:07:39 +0800405 HSM_ST_ERR, /* error */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406};
407
Jeff Garzika7dac442005-10-30 04:44:42 -0500408enum ata_completion_errors {
Tejun Heo11a56d22006-01-23 13:09:36 +0900409 AC_ERR_DEV = (1 << 0), /* device reported error */
410 AC_ERR_HSM = (1 << 1), /* host state machine violation */
411 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
412 AC_ERR_MEDIA = (1 << 3), /* media error */
413 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
414 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
415 AC_ERR_SYSTEM = (1 << 6), /* system error */
416 AC_ERR_INVALID = (1 << 7), /* invalid argument */
417 AC_ERR_OTHER = (1 << 8), /* unknown */
Tejun Heo55a8e2c2006-11-10 18:08:10 +0900418 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
Tejun Heo5335b722007-07-16 14:29:40 +0900419 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
Jeff Garzika7dac442005-10-30 04:44:42 -0500420};
421
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422/* forward declarations */
423struct scsi_device;
424struct ata_port_operations;
425struct ata_port;
Tejun Heocc0680a2007-08-06 18:36:23 +0900426struct ata_link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427struct ata_queued_cmd;
428
429/* typedefs */
Tejun Heo77853bf2006-01-23 13:09:36 +0900430typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
Tejun Heocc0680a2007-08-06 18:36:23 +0900431typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
432typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
Tejun Heod4b2bab2007-02-02 16:50:52 +0900433 unsigned long deadline);
Tejun Heocc0680a2007-08-06 18:36:23 +0900434typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400436/*
437 * host pm policy: If you alter this, you also need to alter libata-scsi.c
438 * (for the ascii descriptions)
439 */
440enum link_pm {
441 NOT_AVAILABLE,
442 MIN_POWER,
443 MAX_PERFORMANCE,
444 MEDIUM_POWER,
445};
Tony Jonesee959b02008-02-22 00:13:36 +0100446extern struct device_attribute dev_attr_link_power_management_policy;
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400447
Tejun Heo127102a2008-04-07 22:47:21 +0900448#ifdef CONFIG_ATA_SFF
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449struct ata_ioports {
Tejun Heo0d5ff562007-02-01 15:06:36 +0900450 void __iomem *cmd_addr;
451 void __iomem *data_addr;
452 void __iomem *error_addr;
453 void __iomem *feature_addr;
454 void __iomem *nsect_addr;
455 void __iomem *lbal_addr;
456 void __iomem *lbam_addr;
457 void __iomem *lbah_addr;
458 void __iomem *device_addr;
459 void __iomem *status_addr;
460 void __iomem *command_addr;
461 void __iomem *altstatus_addr;
462 void __iomem *ctl_addr;
463 void __iomem *bmdma_addr;
464 void __iomem *scr_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465};
Tejun Heo127102a2008-04-07 22:47:21 +0900466#endif /* CONFIG_ATA_SFF */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
Jeff Garzikcca39742006-08-24 03:19:22 -0400468struct ata_host {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 spinlock_t lock;
470 struct device *dev;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900471 void __iomem * const *iomap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 unsigned int n_ports;
473 void *private_data;
Tejun Heo029cfd62008-03-25 12:22:49 +0900474 struct ata_port_operations *ops;
Alan Cox5444a6f2006-03-27 18:58:20 +0100475 unsigned long flags;
Tejun Heofafbae82007-05-15 03:28:16 +0900476#ifdef CONFIG_ATA_ACPI
477 acpi_handle acpi_handle;
478#endif
Alan032af1c2007-03-01 17:36:46 +0000479 struct ata_port *simplex_claimed; /* channel owning the DMA */
Tejun Heof0eb62b2006-06-12 23:05:38 +0900480 struct ata_port *ports[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481};
482
483struct ata_queued_cmd {
484 struct ata_port *ap;
485 struct ata_device *dev;
486
487 struct scsi_cmnd *scsicmd;
488 void (*scsidone)(struct scsi_cmnd *);
489
490 struct ata_taskfile tf;
491 u8 cdb[ATAPI_CDB_LEN];
492
493 unsigned long flags; /* ATA_QCFLAG_xxx */
494 unsigned int tag;
495 unsigned int n_elem;
496
497 int dma_dir;
498
Mark Lord5a5dbd12007-03-16 10:22:26 -0400499 unsigned int sect_size;
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 unsigned int nbytes;
Tejun Heoaacda372008-03-18 17:47:43 +0900502 unsigned int extrabytes;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 unsigned int curbytes;
504
Jens Axboe87260212007-10-16 11:14:12 +0200505 struct scatterlist *cursg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 unsigned int cursg_ofs;
507
508 struct scatterlist sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
Tejun Heoff2aeb12007-12-05 16:43:11 +0900510 struct scatterlist *sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
Albert Leea22e2eb2005-12-05 15:38:02 +0800512 unsigned int err_mask;
Tejun Heoe61e0672006-05-15 20:57:40 +0900513 struct ata_taskfile result_tf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 ata_qc_cb_t complete_fn;
515
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 void *private_data;
Darrick J. Wong1c50dc82007-01-30 01:18:41 -0800517 void *lldd_task;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518};
519
Jeff Garzikcca39742006-08-24 03:19:22 -0400520struct ata_port_stats {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 unsigned long unhandled_irq;
522 unsigned long idle_irq;
523 unsigned long rw_reqbuf;
524};
525
Tejun Heo0c247c52006-05-15 20:58:19 +0900526struct ata_ering_entry {
Tejun Heo3884f7b2007-11-27 19:28:56 +0900527 unsigned int eflags;
Tejun Heo0c247c52006-05-15 20:58:19 +0900528 unsigned int err_mask;
529 u64 timestamp;
530};
531
532struct ata_ering {
533 int cursor;
534 struct ata_ering_entry ring[ATA_ERING_SIZE];
535};
536
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537struct ata_device {
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900538 struct ata_link *link;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 unsigned int devno; /* 0 or 1 */
Tejun Heo72fa4b72006-05-31 18:27:32 +0900540 unsigned long flags; /* ATA_DFLAG_xxx */
Tejun Heo75683fe2007-07-05 13:31:27 +0900541 unsigned int horkage; /* List of broken features */
Tejun Heo3edebac2006-05-31 18:27:40 +0900542 struct scsi_device *sdev; /* attached SCSI device */
Tejun Heofafbae82007-05-15 03:28:16 +0900543#ifdef CONFIG_ATA_ACPI
544 acpi_handle acpi_handle;
Tejun Heo398e0782007-12-15 15:05:03 +0900545 union acpi_object *gtf_cache;
Tejun Heofafbae82007-05-15 03:28:16 +0900546#endif
Tejun Heo72fa4b72006-05-31 18:27:32 +0900547 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
548 u64 n_sectors; /* size of device, if ATA */
549 unsigned int class; /* ATA_DEV_xxx */
Tejun Heoe0a71752007-09-23 13:14:12 +0900550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 u8 pio_mode;
552 u8 dma_mode;
553 u8 xfer_mode;
554 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
555
Albert Lee8cbd6df2005-10-12 15:06:27 +0800556 unsigned int multi_count; /* sectors count for
557 READ/WRITE MULTIPLE */
Tejun Heob00eec12006-02-12 23:32:59 +0900558 unsigned int max_sectors; /* per-device max sectors */
Tejun Heo6e7846e2006-02-12 23:32:58 +0900559 unsigned int cdb_len;
Albert Lee8bf62ec2005-05-12 15:29:42 -0400560
Tejun Heoacf356b2006-03-24 14:07:50 +0900561 /* per-dev xfer mask */
Tejun Heo7dc951a2007-11-27 19:43:42 +0900562 unsigned long pio_mask;
563 unsigned long mwdma_mask;
564 unsigned long udma_mask;
Tejun Heoacf356b2006-03-24 14:07:50 +0900565
Albert Lee8bf62ec2005-05-12 15:29:42 -0400566 /* for CHS addressing */
567 u16 cylinders; /* Number of cylinders */
568 u16 heads; /* Number of heads */
569 u16 sectors; /* Number of sectors per track */
Tejun Heo0c247c52006-05-15 20:58:19 +0900570
571 /* error history */
Tejun Heo7d47e8d2007-02-02 16:22:31 +0900572 int spdn_cnt;
Jeff Garzikf7e98932008-04-29 17:47:34 -0400573 struct ata_ering ering;
574
575 union {
576 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
577 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
578 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579};
580
Tejun Heo72fa4b72006-05-31 18:27:32 +0900581/* Offset into struct ata_device. Fields above it are maintained
582 * acress device init. Fields below are zeroed.
583 */
584#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
585
Tejun Heof3e81b12006-05-15 20:58:21 +0900586struct ata_eh_info {
587 struct ata_device *dev; /* offending device */
588 u32 serror; /* SError from LLDD */
589 unsigned int err_mask; /* port-wide err_mask */
590 unsigned int action; /* ATA_EH_* action mask */
Tejun Heo47005f22006-06-19 18:27:23 +0900591 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
Tejun Heof3e81b12006-05-15 20:58:21 +0900592 unsigned int flags; /* ATA_EHI_* flags */
Tejun Heoabdda732006-05-31 18:27:29 +0900593
Tejun Heoabdda732006-05-31 18:27:29 +0900594 unsigned int probe_mask;
595
Tejun Heof3e81b12006-05-15 20:58:21 +0900596 char desc[ATA_EH_DESC_LEN];
597 int desc_len;
598};
599
600struct ata_eh_context {
601 struct ata_eh_info i;
602 int tries[ATA_MAX_DEVICES];
Tejun Heoabdda732006-05-31 18:27:29 +0900603 unsigned int classes[ATA_MAX_DEVICES];
604 unsigned int did_probe_mask;
Tejun Heo00115e02007-11-27 19:28:58 +0900605 unsigned int saved_ncq_enabled;
606 u8 saved_xfer_mode[ATA_MAX_DEVICES];
Tejun Heof3e81b12006-05-15 20:58:21 +0900607};
608
Tejun Heo64578a32007-05-15 03:28:16 +0900609struct ata_acpi_drive
610{
611 u32 pio;
612 u32 dma;
613} __packed;
614
615struct ata_acpi_gtm {
616 struct ata_acpi_drive drive[2];
617 u32 flags;
618} __packed;
619
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900620struct ata_link {
621 struct ata_port *ap;
Tejun Heo89898052007-08-06 18:36:23 +0900622 int pmp; /* port multiplier port # */
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900623
624 unsigned int active_tag; /* active tag on this link */
625 u32 sactive; /* active NCQ commands */
626
Tejun Heo0c887582007-08-06 18:36:23 +0900627 unsigned int flags; /* ATA_LFLAG_xxx */
628
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900629 unsigned int hw_sata_spd_limit;
630 unsigned int sata_spd_limit;
631 unsigned int sata_spd; /* current SATA PHY speed */
632
633 /* record runtime error info, protected by host_set lock */
634 struct ata_eh_info eh_info;
635 /* EH context */
636 struct ata_eh_context eh_context;
637
638 struct ata_device device[ATA_MAX_DEVICES];
639};
640
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641struct ata_port {
Jeff Garzikcca39742006-08-24 03:19:22 -0400642 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
Tejun Heo029cfd62008-03-25 12:22:49 +0900643 struct ata_port_operations *ops;
Jeff Garzikba6a1302006-06-22 23:46:10 -0400644 spinlock_t *lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 unsigned long flags; /* ATA_FLAG_xxx */
Tejun Heob51e9e52006-06-29 01:29:30 +0900646 unsigned int pflags; /* ATA_PFLAG_xxx */
Tejun Heo44877b42007-02-21 01:06:51 +0900647 unsigned int print_id; /* user visible unique port ID */
648 unsigned int port_no; /* 0 based port no. inside the host */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649
650 struct ata_prd *prd; /* our SG list */
651 dma_addr_t prd_dma; /* and its DMA mapping */
652
Tejun Heo127102a2008-04-07 22:47:21 +0900653#ifdef CONFIG_ATA_SFF
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
Tejun Heo127102a2008-04-07 22:47:21 +0900655#endif /* CONFIG_ATA_SFF */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
657 u8 ctl; /* cache of ATA control register */
658 u8 last_ctl; /* Cache last written value */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 unsigned int pio_mask;
660 unsigned int mwdma_mask;
661 unsigned int udma_mask;
662 unsigned int cbl; /* cable type; ATA_CBL_xxx */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663
664 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
Tejun Heo6cec4a32006-05-15 21:03:41 +0900665 unsigned long qc_allocated;
Tejun Heodedaf2b2006-05-15 21:03:43 +0900666 unsigned int qc_active;
Tejun Heoda917d62007-09-23 13:14:12 +0900667 int nr_active_links; /* #links with active qcs */
Tejun Heodedaf2b2006-05-15 21:03:43 +0900668
Tejun Heo9af5c9c2007-08-06 18:36:22 +0900669 struct ata_link link; /* host default link */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670
Tejun Heo89898052007-08-06 18:36:23 +0900671 int nr_pmp_links; /* nr of available PMP links */
672 struct ata_link *pmp_link; /* array of PMP links */
Tejun Heoda917d62007-09-23 13:14:12 +0900673 struct ata_link *excl_link; /* for PMP qc exclusion */
Tejun Heo89898052007-08-06 18:36:23 +0900674
Jeff Garzikcca39742006-08-24 03:19:22 -0400675 struct ata_port_stats stats;
676 struct ata_host *host;
Brian King2f1f6102006-03-23 17:30:15 -0600677 struct device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
David Howells65f27f32006-11-22 14:55:48 +0000679 void *port_task_data;
David Howells52bad642006-11-22 14:54:01 +0000680 struct delayed_work port_task;
681 struct delayed_work hotplug_task;
Jeff Garzik3b01b8a2006-06-12 00:22:04 -0400682 struct work_struct scsi_rescan_task;
Tejun Heo86e45b62006-03-05 15:29:09 +0900683
Albert Lee14be71f2005-09-27 17:36:35 +0800684 unsigned int hsm_task_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
Randy Dunlapbfd60572006-01-17 19:34:42 -0500686 u32 msg_enable;
Tejun Heoa72ec4c2006-01-23 13:09:37 +0900687 struct list_head eh_done_q;
Tejun Heoc6cf9e92006-05-31 18:27:27 +0900688 wait_queue_head_t eh_wait_q;
Tejun Heoa1e10f72007-08-18 13:28:49 +0900689 int eh_tries;
Randy Dunlapbfd60572006-01-17 19:34:42 -0500690
Tejun Heo500530f2006-07-03 16:07:27 +0900691 pm_message_t pm_mesg;
692 int *pm_result;
Kristen Carlson Accardica773292007-10-25 00:58:59 -0400693 enum link_pm pm_policy;
Tejun Heo500530f2006-07-03 16:07:27 +0900694
Tejun Heo5ddf24c2007-07-16 14:29:41 +0900695 struct timer_list fastdrain_timer;
696 unsigned long fastdrain_cnt;
697
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 void *private_data;
Tejun Heofe635c72006-05-15 20:57:35 +0900699
Tejun Heofafbae82007-05-15 03:28:16 +0900700#ifdef CONFIG_ATA_ACPI
701 acpi_handle acpi_handle;
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900702 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
Tejun Heofafbae82007-05-15 03:28:16 +0900703#endif
Tejun Heofe635c72006-05-15 20:57:35 +0900704 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705};
706
Tejun Heo029cfd62008-03-25 12:22:49 +0900707/* The following initializer overrides a method to NULL whether one of
708 * its parent has the method defined or not. This is equivalent to
709 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
710 * expression and thus can't be used as an initializer.
711 */
712#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714struct ata_port_operations {
Tejun Heoc1bc8992008-03-25 12:22:47 +0900715 /*
716 * Command execution
717 */
718 int (*qc_defer)(struct ata_queued_cmd *qc);
719 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
720 void (*qc_prep)(struct ata_queued_cmd *qc);
721 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
Tejun Heo22183bf2008-04-07 22:47:20 +0900722 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Tejun Heoc1bc8992008-03-25 12:22:47 +0900724 /*
725 * Configuration and exception handling
726 */
727 int (*cable_detect)(struct ata_port *ap);
728 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
729 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
730 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
731 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732
Tejun Heoc1bc8992008-03-25 12:22:47 +0900733 void (*dev_config)(struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734
Tejun Heoc1bc8992008-03-25 12:22:47 +0900735 void (*freeze)(struct ata_port *ap);
736 void (*thaw)(struct ata_port *ap);
Tejun Heoa1efdab2008-03-25 12:22:50 +0900737 ata_prereset_fn_t prereset;
738 ata_reset_fn_t softreset;
739 ata_reset_fn_t hardreset;
740 ata_postreset_fn_t postreset;
741 ata_prereset_fn_t pmp_prereset;
742 ata_reset_fn_t pmp_softreset;
743 ata_reset_fn_t pmp_hardreset;
744 ata_postreset_fn_t pmp_postreset;
Tejun Heoc1bc8992008-03-25 12:22:47 +0900745 void (*error_handler)(struct ata_port *ap);
746 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
747
748 /*
749 * Optional features
750 */
751 int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val);
752 int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val);
753 void (*pmp_attach)(struct ata_port *ap);
754 void (*pmp_detach)(struct ata_port *ap);
755 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
756 void (*disable_pm)(struct ata_port *ap);
757
758 /*
759 * Start, stop, suspend and resume
760 */
761 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
762 int (*port_resume)(struct ata_port *ap);
763 int (*port_start)(struct ata_port *ap);
764 void (*port_stop)(struct ata_port *ap);
765 void (*host_stop)(struct ata_host *host);
766
Tejun Heo127102a2008-04-07 22:47:21 +0900767#ifdef CONFIG_ATA_SFF
Tejun Heoc1bc8992008-03-25 12:22:47 +0900768 /*
769 * SFF / taskfile oriented ops
770 */
Tejun Heo5682ed32008-04-07 22:47:16 +0900771 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
772 u8 (*sff_check_status)(struct ata_port *ap);
773 u8 (*sff_check_altstatus)(struct ata_port *ap);
774 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
775 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
776 void (*sff_exec_command)(struct ata_port *ap,
777 const struct ata_taskfile *tf);
778 unsigned int (*sff_data_xfer)(struct ata_device *dev,
779 unsigned char *buf, unsigned int buflen, int rw);
780 u8 (*sff_irq_on)(struct ata_port *);
781 void (*sff_irq_clear)(struct ata_port *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
Tejun Heoc1bc8992008-03-25 12:22:47 +0900783 void (*bmdma_setup)(struct ata_queued_cmd *qc);
784 void (*bmdma_start)(struct ata_queued_cmd *qc);
785 void (*bmdma_stop)(struct ata_queued_cmd *qc);
786 u8 (*bmdma_status)(struct ata_port *ap);
Tejun Heo127102a2008-04-07 22:47:21 +0900787#endif /* CONFIG_ATA_SFF */
Tejun Heoc19ba8a2006-01-24 17:05:22 +0900788
Tejun Heoc1bc8992008-03-25 12:22:47 +0900789 /*
790 * Obsolete
Tejun Heo9ec957f2006-05-15 20:57:58 +0900791 */
Tejun Heoc1bc8992008-03-25 12:22:47 +0900792 void (*phy_reset)(struct ata_port *ap);
793 void (*eng_timeout)(struct ata_port *ap);
Tejun Heo029cfd62008-03-25 12:22:49 +0900794
795 /*
796 * ->inherits must be the last field and all the preceding
797 * fields must be pointers.
798 */
799 const struct ata_port_operations *inherits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800};
801
802struct ata_port_info {
Jeff Garzikcca39742006-08-24 03:19:22 -0400803 unsigned long flags;
Tejun Heo0c887582007-08-06 18:36:23 +0900804 unsigned long link_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 unsigned long pio_mask;
806 unsigned long mwdma_mask;
807 unsigned long udma_mask;
Tejun Heo029cfd62008-03-25 12:22:49 +0900808 struct ata_port_operations *port_ops;
Alan Coxe99f8b52005-11-08 14:09:44 +0000809 void *private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810};
811
Alan Cox452503f2005-10-21 19:01:32 -0400812struct ata_timing {
813 unsigned short mode; /* ATA mode */
814 unsigned short setup; /* t1 */
815 unsigned short act8b; /* t2 for 8-bit I/O */
816 unsigned short rec8b; /* t2i for 8-bit I/O */
817 unsigned short cyc8b; /* t0 for 8-bit I/O */
818 unsigned short active; /* t2 or tD */
819 unsigned short recover; /* t2i or tK */
820 unsigned short cycle; /* t0 */
821 unsigned short udma; /* t2CYCTYP/2 */
822};
823
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400824#define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
Tejun Heo624d5c52008-03-25 22:16:41 +0900826/*
827 * Core layer - drivers/ata/libata-core.c
828 */
Tejun Heoe9c83912006-07-03 16:07:26 +0900829extern const unsigned long sata_deb_timing_normal[];
830extern const unsigned long sata_deb_timing_hotplug[];
831extern const unsigned long sata_deb_timing_long[];
832
Tejun Heo029cfd62008-03-25 12:22:49 +0900833extern struct ata_port_operations ata_dummy_port_ops;
Tejun Heo21b0ad42007-04-17 23:44:07 +0900834extern const struct ata_port_info ata_dummy_port_info;
Tejun Heodd5b06c2006-08-10 16:59:12 +0900835
Tejun Heoe9c83912006-07-03 16:07:26 +0900836static inline const unsigned long *
837sata_ehc_deb_timing(struct ata_eh_context *ehc)
838{
839 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
840 return sata_deb_timing_hotplug;
841 else
842 return sata_deb_timing_normal;
843}
Tejun Heod7bb4cc2006-05-31 18:27:46 +0900844
Tejun Heodd5b06c2006-08-10 16:59:12 +0900845static inline int ata_port_is_dummy(struct ata_port *ap)
846{
847 return ap->ops == &ata_dummy_port_ops;
848}
849
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850extern void ata_port_probe(struct ata_port *);
Tejun Heo936fd732007-08-06 18:36:23 +0900851extern int sata_set_spd(struct ata_link *link);
Tejun Heo0aa11132008-04-07 22:47:18 +0900852extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
Tejun Heoaa2731a2008-04-07 22:47:19 +0900853extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
854 int (*check_ready)(struct ata_link *link));
Tejun Heo936fd732007-08-06 18:36:23 +0900855extern int sata_link_debounce(struct ata_link *link,
856 const unsigned long *params, unsigned long deadline);
857extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
858 unsigned long deadline);
Tejun Heocc0680a2007-08-06 18:36:23 +0900859extern int sata_link_hardreset(struct ata_link *link,
Tejun Heo9dadd452008-04-07 22:47:19 +0900860 const unsigned long *timing, unsigned long deadline,
861 bool *online, int (*check_ready)(struct ata_link *));
Tejun Heo57c9efd2008-04-07 22:47:19 +0900862extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
863 unsigned long deadline);
Tejun Heo203c75b2008-04-07 22:47:18 +0900864extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865extern void ata_port_disable(struct ata_port *);
Jeff Garzik28555682007-10-11 17:12:35 -0400866
Tejun Heof3187192007-04-17 23:44:07 +0900867extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
Tejun Heof5cda252007-04-17 23:44:07 +0900868extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
869 const struct ata_port_info * const * ppi, int n_ports);
Tejun Heoecef7252007-04-17 23:44:06 +0900870extern int ata_host_start(struct ata_host *host);
Tejun Heof3187192007-04-17 23:44:07 +0900871extern int ata_host_register(struct ata_host *host,
872 struct scsi_host_template *sht);
Tejun Heof5cda252007-04-17 23:44:07 +0900873extern int ata_host_activate(struct ata_host *host, int irq,
874 irq_handler_t irq_handler, unsigned long irq_flags,
875 struct scsi_host_template *sht);
Tejun Heo0529c152007-01-20 16:00:26 +0900876extern void ata_host_detach(struct ata_host *host);
Jeff Garzikcca39742006-08-24 03:19:22 -0400877extern void ata_host_init(struct ata_host *, struct device *,
Tejun Heo029cfd62008-03-25 12:22:49 +0900878 unsigned long, struct ata_port_operations *);
Jeff Garzik193515d2005-11-07 00:59:37 -0500879extern int ata_scsi_detect(struct scsi_host_template *sht);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
881extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
Brian King80289162006-08-07 14:27:31 -0500882extern void ata_sas_port_destroy(struct ata_port *);
Jeff Garzikcca39742006-08-24 03:19:22 -0400883extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
Brian King80289162006-08-07 14:27:31 -0500884 struct ata_port_info *, struct Scsi_Host *);
885extern int ata_sas_port_init(struct ata_port *);
886extern int ata_sas_port_start(struct ata_port *ap);
887extern void ata_sas_port_stop(struct ata_port *ap);
888extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
889extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
890 struct ata_port *ap);
Tejun Heo936fd732007-08-06 18:36:23 +0900891extern int sata_scr_valid(struct ata_link *link);
892extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
893extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
894extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
895extern int ata_link_online(struct ata_link *link);
896extern int ata_link_offline(struct ata_link *link);
Tejun Heo6ffa01d2007-03-02 17:32:47 +0900897#ifdef CONFIG_PM
Jeff Garzikcca39742006-08-24 03:19:22 -0400898extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
899extern void ata_host_resume(struct ata_host *host);
Tejun Heo6ffa01d2007-03-02 17:32:47 +0900900#endif
Jeff Garzik67846b32005-10-05 02:58:32 -0400901extern int ata_ratelimit(void);
Tejun Heoc22daff2006-04-11 22:22:29 +0900902extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
903 unsigned long interval_msec,
904 unsigned long timeout_msec);
Tejun Heo436d34b2008-04-02 17:28:46 +0900905extern int atapi_cmd_type(u8 opcode);
Tejun Heo99771262007-07-16 14:29:38 +0900906extern void ata_tf_to_fis(const struct ata_taskfile *tf,
907 u8 pmp, int is_cmd, u8 *fis);
Jeff Garzik057ace52005-10-22 14:27:05 -0400908extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
Tejun Heo7dc951a2007-11-27 19:43:42 +0900909extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
910 unsigned long mwdma_mask, unsigned long udma_mask);
911extern void ata_unpack_xfermask(unsigned long xfer_mask,
912 unsigned long *pio_mask, unsigned long *mwdma_mask,
913 unsigned long *udma_mask);
914extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
915extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
916extern int ata_xfer_mode2shift(unsigned long xfer_mode);
917extern const char *ata_mode_string(unsigned long xfer_mask);
918extern unsigned long ata_id_xfermask(const u16 *id);
Jeff Garzik2dcb4072007-10-19 06:42:56 -0400919extern int ata_port_start(struct ata_port *ap);
Tejun Heo31cc23b2007-09-23 13:14:12 +0900920extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
Brian Kinge46834c2006-03-17 17:04:03 -0600921extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
923 unsigned int n_elem);
Jeff Garzik057ace52005-10-22 14:27:05 -0400924extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
Alan10305f02007-02-20 18:01:59 +0000925extern void ata_dev_disable(struct ata_device *adev);
Tejun Heo6a62a042006-02-13 10:02:46 +0900926extern void ata_id_string(const u16 *id, unsigned char *s,
927 unsigned int ofs, unsigned int len);
928extern void ata_id_c_string(const u16 *id, unsigned char *s,
929 unsigned int ofs, unsigned int len);
Tejun Heof686bcb2006-05-15 20:58:05 +0900930extern void ata_qc_complete(struct ata_queued_cmd *qc);
Tejun Heo79f97da2008-04-07 22:47:20 +0900931extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
Tejun Heo3373efd2006-05-15 20:57:53 +0900932extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 void (*done)(struct scsi_cmnd *));
934extern int ata_std_bios_param(struct scsi_device *sdev,
935 struct block_device *bdev,
936 sector_t capacity, int geom[]);
937extern int ata_scsi_slave_config(struct scsi_device *sdev);
Tejun Heo83c47bc2006-05-31 18:28:07 +0900938extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900939extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
940 int queue_depth);
Tejun Heo3373efd2006-05-15 20:57:53 +0900941extern struct ata_device *ata_dev_pair(struct ata_device *adev);
Tejun Heo02607312007-08-06 18:36:23 +0900942extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Alan Coxbe0d18d2007-03-06 02:37:56 -0800944extern int ata_cable_40wire(struct ata_port *ap);
945extern int ata_cable_80wire(struct ata_port *ap);
946extern int ata_cable_sata(struct ata_port *ap);
Tejun Heoc88f90c2007-11-27 19:43:48 +0900947extern int ata_cable_ignore(struct ata_port *ap);
Alan Coxbe0d18d2007-03-06 02:37:56 -0800948extern int ata_cable_unknown(struct ata_port *ap);
949
Tejun Heo624d5c52008-03-25 22:16:41 +0900950/* Timing helpers */
Alan Cox1bc4ccf2006-01-09 17:18:14 +0000951extern unsigned int ata_pio_need_iordy(const struct ata_device *);
Tejun Heo63573572007-11-27 19:43:39 +0900952extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
Alan Cox452503f2005-10-21 19:01:32 -0400953extern int ata_timing_compute(struct ata_device *, unsigned short,
954 struct ata_timing *, int, int);
955extern void ata_timing_merge(const struct ata_timing *,
956 const struct ata_timing *, struct ata_timing *,
957 unsigned int);
Tejun Heoa0f79b92007-12-18 16:33:05 +0900958extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
Alan Cox452503f2005-10-21 19:01:32 -0400959
Tejun Heo624d5c52008-03-25 22:16:41 +0900960/* PCI */
961#ifdef CONFIG_PCI
962struct pci_dev;
963
964struct pci_bits {
965 unsigned int reg; /* PCI config register to read */
966 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
967 unsigned long mask;
968 unsigned long val;
Alan Cox452503f2005-10-21 19:01:32 -0400969};
970
Tejun Heo624d5c52008-03-25 22:16:41 +0900971extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
972extern void ata_pci_remove_one(struct pci_dev *pdev);
973
974#ifdef CONFIG_PM
975extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
976extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
977extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
978extern int ata_pci_device_resume(struct pci_dev *pdev);
979#endif /* CONFIG_PM */
980#endif /* CONFIG_PCI */
981
982/*
983 * ACPI - drivers/ata/libata-acpi.c
984 */
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400985#ifdef CONFIG_ATA_ACPI
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900986static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
987{
988 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
989 return &ap->__acpi_init_gtm;
990 return NULL;
991}
Tejun Heo0d02f0b2007-12-15 15:04:57 +0900992int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
993int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
Tejun Heo7c77fa42007-12-18 16:33:03 +0900994unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
995 const struct ata_acpi_gtm *gtm);
Tejun Heo021ee9a2007-12-18 16:33:06 +0900996int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
Alan Coxe1ddb4b2007-08-16 02:33:36 -0400997#else
Tejun Heoc05e6ff2007-12-15 15:05:02 +0900998static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
999{
1000 return NULL;
1001}
Tejun Heo7c77fa42007-12-18 16:33:03 +09001002
1003static inline int ata_acpi_stm(const struct ata_port *ap,
1004 struct ata_acpi_gtm *stm)
1005{
1006 return -ENOSYS;
1007}
1008
1009static inline int ata_acpi_gtm(const struct ata_port *ap,
1010 struct ata_acpi_gtm *stm)
1011{
1012 return -ENOSYS;
1013}
1014
1015static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1016 const struct ata_acpi_gtm *gtm)
1017{
1018 return 0;
1019}
Tejun Heo021ee9a2007-12-18 16:33:06 +09001020
1021static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1022 const struct ata_acpi_gtm *gtm)
1023{
1024 return 0;
1025}
Alan Coxe1ddb4b2007-08-16 02:33:36 -04001026#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027
Tejun Heoece1d632006-04-02 18:51:53 +09001028/*
Tejun Heo624d5c52008-03-25 22:16:41 +09001029 * EH - drivers/ata/libata-eh.c
Tejun Heoece1d632006-04-02 18:51:53 +09001030 */
Tejun Heo7b70fc02006-05-15 20:58:07 +09001031extern void ata_port_schedule_eh(struct ata_port *ap);
Tejun Heodbd82612007-08-06 18:36:23 +09001032extern int ata_link_abort(struct ata_link *link);
Tejun Heo7b70fc02006-05-15 20:58:07 +09001033extern int ata_port_abort(struct ata_port *ap);
Tejun Heoe3180492006-05-15 20:58:09 +09001034extern int ata_port_freeze(struct ata_port *ap);
Tejun Heo7d77b242007-09-23 13:14:13 +09001035extern int sata_async_notification(struct ata_port *ap);
Tejun Heoe3180492006-05-15 20:58:09 +09001036
1037extern void ata_eh_freeze_port(struct ata_port *ap);
1038extern void ata_eh_thaw_port(struct ata_port *ap);
Tejun Heo7b70fc02006-05-15 20:58:07 +09001039
Tejun Heoece1d632006-04-02 18:51:53 +09001040extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1041extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
Mark Lord10acf3b2008-05-02 02:14:53 -04001042extern void ata_eh_analyze_ncq_error(struct ata_link *link);
Tejun Heoece1d632006-04-02 18:51:53 +09001043
Tejun Heof5914a42006-05-31 18:27:48 +09001044extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1045 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1046 ata_postreset_fn_t postreset);
Tejun Heoa1efdab2008-03-25 12:22:50 +09001047extern void ata_std_error_handler(struct ata_port *ap);
Tejun Heo022bdb02006-05-15 20:58:22 +09001048
Tejun Heo61440db2006-05-15 20:57:55 +09001049/*
Tejun Heo68d1d072008-03-25 12:22:49 +09001050 * Base operations to inherit from and initializers for sht
1051 *
1052 * Operations
1053 *
1054 * base : Common to all libata drivers.
1055 * sata : SATA controllers w/ native interface.
1056 * pmp : SATA controllers w/ PMP support.
1057 * sff : SFF ATA controllers w/o BMDMA support.
1058 * bmdma : SFF ATA controllers w/ BMDMA support.
1059 *
1060 * sht initializers
1061 *
1062 * BASE : Common to all libata drivers. The user must set
1063 * sg_tablesize and dma_boundary.
1064 * PIO : SFF ATA controllers w/ only PIO support.
1065 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1066 * dma_boundary are set to BMDMA limits.
1067 * NCQ : SATA controllers supporting NCQ. The user must set
1068 * sg_tablesize, dma_boundary and can_queue.
1069 */
1070extern const struct ata_port_operations ata_base_port_ops;
1071extern const struct ata_port_operations sata_port_ops;
Tejun Heo68d1d072008-03-25 12:22:49 +09001072
1073#define ATA_BASE_SHT(drv_name) \
1074 .module = THIS_MODULE, \
1075 .name = drv_name, \
1076 .ioctl = ata_scsi_ioctl, \
1077 .queuecommand = ata_scsi_queuecmd, \
1078 .can_queue = ATA_DEF_QUEUE, \
1079 .this_id = ATA_SHT_THIS_ID, \
1080 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1081 .emulated = ATA_SHT_EMULATED, \
1082 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1083 .proc_name = drv_name, \
1084 .slave_configure = ata_scsi_slave_config, \
1085 .slave_destroy = ata_scsi_slave_destroy, \
1086 .bios_param = ata_std_bios_param
1087
Tejun Heo68d1d072008-03-25 12:22:49 +09001088#define ATA_NCQ_SHT(drv_name) \
1089 ATA_BASE_SHT(drv_name), \
1090 .change_queue_depth = ata_scsi_change_queue_depth
1091
1092/*
Tejun Heo071f44b2008-04-07 22:47:22 +09001093 * PMP helpers
1094 */
Tejun Heo88fcd562008-04-07 22:47:22 +09001095#ifdef CONFIG_SATA_PMP
Tejun Heo071f44b2008-04-07 22:47:22 +09001096static inline bool sata_pmp_supported(struct ata_port *ap)
1097{
1098 return ap->flags & ATA_FLAG_PMP;
1099}
1100
1101static inline bool sata_pmp_attached(struct ata_port *ap)
1102{
1103 return ap->nr_pmp_links != 0;
1104}
1105
1106static inline int ata_is_host_link(const struct ata_link *link)
1107{
1108 return link == &link->ap->link;
1109}
Tejun Heo88fcd562008-04-07 22:47:22 +09001110#else /* CONFIG_SATA_PMP */
1111static inline bool sata_pmp_supported(struct ata_port *ap)
1112{
1113 return false;
1114}
1115
1116static inline bool sata_pmp_attached(struct ata_port *ap)
1117{
1118 return false;
1119}
1120
1121static inline int ata_is_host_link(const struct ata_link *link)
1122{
1123 return 1;
1124}
1125#endif /* CONFIG_SATA_PMP */
Tejun Heo071f44b2008-04-07 22:47:22 +09001126
1127static inline int sata_srst_pmp(struct ata_link *link)
1128{
1129 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1130 return SATA_PMP_CTRL_PORT;
1131 return link->pmp;
1132}
1133
1134/*
Tejun Heo61440db2006-05-15 20:57:55 +09001135 * printk helpers
1136 */
1137#define ata_port_printk(ap, lv, fmt, args...) \
Tejun Heoc2e366a2007-12-15 15:04:58 +09001138 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
Tejun Heo89898052007-08-06 18:36:23 +09001140#define ata_link_printk(link, lv, fmt, args...) do { \
Tejun Heo071f44b2008-04-07 22:47:22 +09001141 if (sata_pmp_attached((link)->ap)) \
Tejun Heoc2e366a2007-12-15 15:04:58 +09001142 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
Tejun Heo89898052007-08-06 18:36:23 +09001143 (link)->pmp , ##args); \
1144 else \
Tejun Heoc2e366a2007-12-15 15:04:58 +09001145 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
Tejun Heo89898052007-08-06 18:36:23 +09001146 } while(0)
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001147
Tejun Heo61440db2006-05-15 20:57:55 +09001148#define ata_dev_printk(dev, lv, fmt, args...) \
Tejun Heoc2e366a2007-12-15 15:04:58 +09001149 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
Tejun Heo89898052007-08-06 18:36:23 +09001150 (dev)->link->pmp + (dev)->devno , ##args)
Tejun Heo61440db2006-05-15 20:57:55 +09001151
1152/*
Tejun Heof3e81b12006-05-15 20:58:21 +09001153 * ata_eh_info helpers
1154 */
Tejun Heocb94c1c2007-07-30 14:24:15 +09001155extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1156 __attribute__ ((format (printf, 2, 3)));
1157extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1158 __attribute__ ((format (printf, 2, 3)));
Tejun Heob64bbc32007-07-16 14:29:39 +09001159extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
Tejun Heof3e81b12006-05-15 20:58:21 +09001160
Tejun Heoc0b6c032006-07-03 16:07:26 +09001161static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1162{
Tejun Heob558edd2008-01-24 00:05:14 +09001163 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
Tejun Heof8f1e1c2007-07-16 14:29:40 +09001164 ehi->flags |= ATA_EHI_HOTPLUGGED;
Tejun Heob558edd2008-01-24 00:05:14 +09001165 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
Tejun Heoc0b6c032006-07-03 16:07:26 +09001166 ehi->err_mask |= AC_ERR_ATA_BUS;
1167}
1168
Tejun Heof3e81b12006-05-15 20:58:21 +09001169/*
Tejun Heocbcdd872007-08-18 13:14:55 +09001170 * port description helpers
1171 */
1172extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1173 __attribute__ ((format (printf, 2, 3)));
1174#ifdef CONFIG_PCI
1175extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1176 const char *name);
1177#endif
1178
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179static inline unsigned int ata_tag_valid(unsigned int tag)
1180{
1181 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1182}
1183
Tejun Heo2ab7db12006-05-15 20:58:02 +09001184static inline unsigned int ata_tag_internal(unsigned int tag)
1185{
Yoichi Yuasa83c063d2008-02-28 21:43:13 +09001186 return tag == ATA_TAG_INTERNAL;
Tejun Heo2ab7db12006-05-15 20:58:02 +09001187}
1188
Tejun Heo5806db22006-06-24 20:30:19 +09001189/*
1190 * device helpers
1191 */
Tejun Heoe1211e32006-04-01 01:38:18 +09001192static inline unsigned int ata_class_enabled(unsigned int class)
Tejun Heo597afd22006-03-01 01:25:38 +09001193{
Tejun Heoe0a71752007-09-23 13:14:12 +09001194 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1195 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
Tejun Heo597afd22006-03-01 01:25:38 +09001196}
1197
Tejun Heoe1211e32006-04-01 01:38:18 +09001198static inline unsigned int ata_class_disabled(unsigned int class)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199{
Tejun Heoe0a71752007-09-23 13:14:12 +09001200 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1201 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
Tejun Heoe1211e32006-04-01 01:38:18 +09001202}
1203
Tejun Heo002c8052006-04-02 17:54:46 +09001204static inline unsigned int ata_class_absent(unsigned int class)
1205{
1206 return !ata_class_enabled(class) && !ata_class_disabled(class);
1207}
1208
Tejun Heoe1211e32006-04-01 01:38:18 +09001209static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1210{
1211 return ata_class_enabled(dev->class);
1212}
1213
1214static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1215{
1216 return ata_class_disabled(dev->class);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217}
1218
Tejun Heo002c8052006-04-02 17:54:46 +09001219static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1220{
1221 return ata_class_absent(dev->class);
1222}
1223
Tejun Heo5806db22006-06-24 20:30:19 +09001224/*
Tejun Heof58229f2007-08-06 18:36:23 +09001225 * link helpers
Tejun Heo5806db22006-06-24 20:30:19 +09001226 */
Tejun Heof58229f2007-08-06 18:36:23 +09001227static inline int ata_link_max_devices(const struct ata_link *link)
Tejun Heo5806db22006-06-24 20:30:19 +09001228{
Tejun Heo89898052007-08-06 18:36:23 +09001229 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
Tejun Heo5806db22006-06-24 20:30:19 +09001230 return 2;
1231 return 1;
1232}
1233
Tejun Heoda917d62007-09-23 13:14:12 +09001234static inline int ata_link_active(struct ata_link *link)
1235{
1236 return ata_tag_valid(link->active_tag) || link->sactive;
1237}
1238
Tejun Heo89898052007-08-06 18:36:23 +09001239static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1240{
Tejun Heo071f44b2008-04-07 22:47:22 +09001241 if (sata_pmp_attached(ap))
Tejun Heo89898052007-08-06 18:36:23 +09001242 return ap->pmp_link;
1243 return &ap->link;
1244}
1245
1246static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1247{
1248 struct ata_port *ap = link->ap;
1249
Tejun Heo071f44b2008-04-07 22:47:22 +09001250 if (ata_is_host_link(link)) {
1251 if (!sata_pmp_attached(ap))
Tejun Heo89898052007-08-06 18:36:23 +09001252 return NULL;
1253 return ap->pmp_link;
1254 }
1255
Harvey Harrison5d44b412008-02-15 13:41:32 -08001256 if (++link < ap->nr_pmp_links + ap->pmp_link)
Tejun Heo89898052007-08-06 18:36:23 +09001257 return link;
1258 return NULL;
1259}
1260
1261#define __ata_port_for_each_link(lk, ap) \
1262 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1263
1264#define ata_port_for_each_link(link, ap) \
1265 for ((link) = ata_port_first_link(ap); (link); \
1266 (link) = ata_port_next_link(link))
Tejun Heof58229f2007-08-06 18:36:23 +09001267
1268#define ata_link_for_each_dev(dev, link) \
1269 for ((dev) = (link)->device; \
1270 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1271 (dev)++)
1272
1273#define ata_link_for_each_dev_reverse(dev, link) \
1274 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1275 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
Tejun Heo5806db22006-06-24 20:30:19 +09001276
Tejun Heo6d1245b2007-02-20 23:20:27 +09001277/**
1278 * ata_ncq_enabled - Test whether NCQ is enabled
1279 * @dev: ATA device to test for
1280 *
1281 * LOCKING:
1282 * spin_lock_irqsave(host lock)
1283 *
1284 * RETURNS:
1285 * 1 if NCQ is enabled for @dev, 0 otherwise.
1286 */
1287static inline int ata_ncq_enabled(struct ata_device *dev)
1288{
1289 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1290 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1291}
Edward Falk0baab862005-06-02 18:17:13 -04001292
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1294{
1295 qc->tf.ctl |= ATA_NIEN;
1296}
1297
Tejun Heof69499f2006-05-15 20:58:03 +09001298static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1299 unsigned int tag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300{
1301 if (likely(ata_tag_valid(tag)))
1302 return &ap->qcmd[tag];
1303 return NULL;
1304}
1305
Tejun Heof69499f2006-05-15 20:58:03 +09001306static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1307 unsigned int tag)
1308{
1309 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1310
1311 if (unlikely(!qc) || !ap->ops->error_handler)
1312 return qc;
1313
1314 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1315 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1316 return qc;
1317
1318 return NULL;
1319}
1320
Tejun Heoaacda372008-03-18 17:47:43 +09001321static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1322{
1323 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1324}
1325
Tejun Heo3373efd2006-05-15 20:57:53 +09001326static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327{
1328 memset(tf, 0, sizeof(*tf));
1329
Tejun Heo9af5c9c2007-08-06 18:36:22 +09001330 tf->ctl = dev->link->ap->ctl;
Tejun Heo3373efd2006-05-15 20:57:53 +09001331 if (dev->devno == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 tf->device = ATA_DEVICE_OBS;
1333 else
1334 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1335}
1336
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001337static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1338{
Tejun Heo501e0c52007-01-17 11:34:02 +09001339 qc->dma_dir = DMA_NONE;
Tejun Heoff2aeb12007-12-05 16:43:11 +09001340 qc->sg = NULL;
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001341 qc->flags = 0;
Jens Axboe87260212007-10-16 11:14:12 +02001342 qc->cursg = NULL;
1343 qc->cursg_ofs = 0;
Tejun Heoaacda372008-03-18 17:47:43 +09001344 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
Brian King7a801182007-01-17 12:32:12 -06001345 qc->n_elem = 0;
Albert Leea22e2eb2005-12-05 15:38:02 +08001346 qc->err_mask = 0;
Mark Lord5a5dbd12007-03-16 10:22:26 -04001347 qc->sect_size = ATA_SECT_SIZE;
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001348
Tejun Heo3373efd2006-05-15 20:57:53 +09001349 ata_tf_init(qc->dev, &qc->tf);
Tejun Heoe61e0672006-05-15 20:57:40 +09001350
1351 /* init result_tf such that it indicates normal completion */
1352 qc->result_tf.command = ATA_DRDY;
1353 qc->result_tf.feature = 0;
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001354}
1355
Jeff Garzik057ace52005-10-22 14:27:05 -04001356static inline int ata_try_flush_cache(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357{
1358 return ata_id_wcache_enabled(dev->id) ||
1359 ata_id_has_flush(dev->id) ||
1360 ata_id_has_flush_ext(dev->id);
1361}
1362
Jeff Garzika7dac442005-10-30 04:44:42 -05001363static inline unsigned int ac_err_mask(u8 status)
1364{
Albert Lee3655d1d2006-05-19 11:43:04 +08001365 if (status & (ATA_BUSY | ATA_DRQ))
Tejun Heo11a56d22006-01-23 13:09:36 +09001366 return AC_ERR_HSM;
Jeff Garzika7dac442005-10-30 04:44:42 -05001367 if (status & (ATA_ERR | ATA_DF))
1368 return AC_ERR_DEV;
1369 return 0;
1370}
1371
1372static inline unsigned int __ac_err_mask(u8 status)
1373{
1374 unsigned int mask = ac_err_mask(status);
1375 if (mask == 0)
1376 return AC_ERR_OTHER;
1377 return mask;
1378}
1379
Jeff Garzik35bb94b2006-04-11 13:12:34 -04001380static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1381{
Tejun Heo49114872007-04-17 23:44:06 +09001382 return *(struct ata_port **)&host->hostdata[0];
Jeff Garzik35bb94b2006-04-11 13:12:34 -04001383}
1384
Tejun Heo78ab88f2008-05-01 23:41:41 +09001385static inline int ata_check_ready(u8 status)
1386{
Jeff Garzik005b1f72008-05-09 15:00:55 -04001387 if (!(status & ATA_BUSY))
1388 return 1;
Tejun Heo78ab88f2008-05-01 23:41:41 +09001389
1390 /* 0xff indicates either no device or device not ready */
1391 if (status == 0xff)
1392 return -ENODEV;
1393
Jeff Garzik005b1f72008-05-09 15:00:55 -04001394 return 0;
Tejun Heo78ab88f2008-05-01 23:41:41 +09001395}
1396
Tejun Heo48515f62008-04-07 22:47:21 +09001397
1398/**************************************************************************
1399 * PMP - drivers/ata/libata-pmp.c
1400 */
Tejun Heo88fcd562008-04-07 22:47:22 +09001401#ifdef CONFIG_SATA_PMP
1402
Tejun Heo48515f62008-04-07 22:47:21 +09001403extern const struct ata_port_operations sata_pmp_port_ops;
1404
1405extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1406extern void sata_pmp_error_handler(struct ata_port *ap);
1407
Tejun Heo88fcd562008-04-07 22:47:22 +09001408#else /* CONFIG_SATA_PMP */
1409
1410#define sata_pmp_port_ops sata_port_ops
1411#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1412#define sata_pmp_error_handler ata_std_error_handler
1413
1414#endif /* CONFIG_SATA_PMP */
1415
Tejun Heo48515f62008-04-07 22:47:21 +09001416
Tejun Heo624d5c52008-03-25 22:16:41 +09001417/**************************************************************************
1418 * SFF - drivers/ata/libata-sff.c
1419 */
Tejun Heo127102a2008-04-07 22:47:21 +09001420#ifdef CONFIG_ATA_SFF
1421
Tejun Heo624d5c52008-03-25 22:16:41 +09001422extern const struct ata_port_operations ata_sff_port_ops;
1423extern const struct ata_port_operations ata_bmdma_port_ops;
1424
1425/* PIO only, sg_tablesize and dma_boundary limits can be removed */
1426#define ATA_PIO_SHT(drv_name) \
1427 ATA_BASE_SHT(drv_name), \
1428 .sg_tablesize = LIBATA_MAX_PRD, \
1429 .dma_boundary = ATA_DMA_BOUNDARY
1430
1431#define ATA_BMDMA_SHT(drv_name) \
1432 ATA_BASE_SHT(drv_name), \
1433 .sg_tablesize = LIBATA_MAX_PRD, \
1434 .dma_boundary = ATA_DMA_BOUNDARY
1435
Tejun Heo9363c382008-04-07 22:47:16 +09001436extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1437extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1438extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1439extern u8 ata_sff_check_status(struct ata_port *ap);
1440extern u8 ata_sff_altstatus(struct ata_port *ap);
1441extern int ata_sff_busy_sleep(struct ata_port *ap,
1442 unsigned long timeout_pat, unsigned long timeout);
Tejun Heo705e76b2008-04-07 22:47:19 +09001443extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
Tejun Heo9363c382008-04-07 22:47:16 +09001444extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1445extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1446extern void ata_sff_exec_command(struct ata_port *ap,
1447 const struct ata_taskfile *tf);
1448extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
Tejun Heo624d5c52008-03-25 22:16:41 +09001449 unsigned char *buf, unsigned int buflen, int rw);
Tejun Heo9363c382008-04-07 22:47:16 +09001450extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
Tejun Heo624d5c52008-03-25 22:16:41 +09001451 unsigned char *buf, unsigned int buflen, int rw);
Tejun Heo9363c382008-04-07 22:47:16 +09001452extern u8 ata_sff_irq_on(struct ata_port *ap);
1453extern void ata_sff_irq_clear(struct ata_port *ap);
1454extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1455 u8 status, int in_wq);
1456extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
Tejun Heo22183bf2008-04-07 22:47:20 +09001457extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
Tejun Heo9363c382008-04-07 22:47:16 +09001458extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1459 struct ata_queued_cmd *qc);
1460extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1461extern void ata_sff_freeze(struct ata_port *ap);
1462extern void ata_sff_thaw(struct ata_port *ap);
1463extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1464extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1465 u8 *r_err);
Tejun Heo705e76b2008-04-07 22:47:19 +09001466extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1467 unsigned long deadline);
Tejun Heo9363c382008-04-07 22:47:16 +09001468extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
Tejun Heo624d5c52008-03-25 22:16:41 +09001469 unsigned long deadline);
Tejun Heo9363c382008-04-07 22:47:16 +09001470extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1471 unsigned long deadline);
1472extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1473extern void ata_sff_error_handler(struct ata_port *ap);
1474extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
Tejun Heo624d5c52008-03-25 22:16:41 +09001475extern int ata_sff_port_start(struct ata_port *ap);
Tejun Heo9363c382008-04-07 22:47:16 +09001476extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1477extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1478 unsigned long xfer_mask);
Tejun Heo624d5c52008-03-25 22:16:41 +09001479extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1480extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1481extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1482extern u8 ata_bmdma_status(struct ata_port *ap);
1483extern void ata_bus_reset(struct ata_port *ap);
1484
1485#ifdef CONFIG_PCI
Tejun Heo9363c382008-04-07 22:47:16 +09001486extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1487extern int ata_pci_bmdma_init(struct ata_host *host);
1488extern int ata_pci_sff_init_host(struct ata_host *host);
1489extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
Tejun Heo624d5c52008-03-25 22:16:41 +09001490 const struct ata_port_info * const * ppi,
1491 struct ata_host **r_host);
Tejun Heo9363c382008-04-07 22:47:16 +09001492extern int ata_pci_sff_activate_host(struct ata_host *host,
Tejun Heo624d5c52008-03-25 22:16:41 +09001493 irq_handler_t irq_handler,
1494 struct scsi_host_template *sht);
Tejun Heo9363c382008-04-07 22:47:16 +09001495extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1496 const struct ata_port_info * const * ppi,
1497 struct scsi_host_template *sht, void *host_priv);
Tejun Heo624d5c52008-03-25 22:16:41 +09001498#endif /* CONFIG_PCI */
1499
Tejun Heo624d5c52008-03-25 22:16:41 +09001500/**
Tejun Heo9363c382008-04-07 22:47:16 +09001501 * ata_sff_pause - Flush writes and pause 400 nanoseconds.
Tejun Heo624d5c52008-03-25 22:16:41 +09001502 * @ap: Port to wait for.
1503 *
1504 * LOCKING:
1505 * Inherited from caller.
1506 */
Tejun Heo9363c382008-04-07 22:47:16 +09001507static inline void ata_sff_pause(struct ata_port *ap)
Tejun Heo624d5c52008-03-25 22:16:41 +09001508{
Tejun Heo9363c382008-04-07 22:47:16 +09001509 ata_sff_altstatus(ap);
Tejun Heo624d5c52008-03-25 22:16:41 +09001510 ndelay(400);
1511}
1512
1513/**
Tejun Heo9363c382008-04-07 22:47:16 +09001514 * ata_sff_busy_wait - Wait for a port status register
Tejun Heo624d5c52008-03-25 22:16:41 +09001515 * @ap: Port to wait for.
1516 * @bits: bits that must be clear
1517 * @max: number of 10uS waits to perform
1518 *
1519 * Waits up to max*10 microseconds for the selected bits in the port's
1520 * status register to be cleared.
1521 * Returns final value of status register.
1522 *
1523 * LOCKING:
1524 * Inherited from caller.
1525 */
Tejun Heo9363c382008-04-07 22:47:16 +09001526static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1527 unsigned int max)
Tejun Heo624d5c52008-03-25 22:16:41 +09001528{
1529 u8 status;
1530
1531 do {
1532 udelay(10);
Tejun Heo5682ed32008-04-07 22:47:16 +09001533 status = ap->ops->sff_check_status(ap);
Tejun Heo624d5c52008-03-25 22:16:41 +09001534 max--;
1535 } while (status != 0xff && (status & bits) && (max > 0));
1536
1537 return status;
1538}
1539
1540/**
1541 * ata_wait_idle - Wait for a port to be idle.
1542 * @ap: Port to wait for.
1543 *
1544 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1545 * Returns final value of status register.
1546 *
1547 * LOCKING:
1548 * Inherited from caller.
1549 */
1550static inline u8 ata_wait_idle(struct ata_port *ap)
1551{
Tejun Heo9363c382008-04-07 22:47:16 +09001552 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
Tejun Heo624d5c52008-03-25 22:16:41 +09001553
1554#ifdef ATA_DEBUG
1555 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1556 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1557 status);
1558#endif
1559
1560 return status;
1561}
Tejun Heo127102a2008-04-07 22:47:21 +09001562#endif /* CONFIG_ATA_SFF */
Tejun Heo624d5c52008-03-25 22:16:41 +09001563
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564#endif /* __LINUX_LIBATA_H__ */