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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>
31#include <linux/pci.h>
Andrew Morton1c72d8d2005-11-10 16:21:38 -080032#include <linux/dma-mapping.h>
Andrew Morton41542db2006-06-23 04:18:31 -070033#include <asm/scatterlist.h>
Tejun Heof0d36ef2007-01-20 16:00:28 +090034#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/ata.h>
36#include <linux/workqueue.h>
Jeff Garzik35bb94b2006-04-11 13:12:34 -040037#include <scsi/scsi_host.h>
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -070038#include <linux/acpi.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
110/* move to PCI layer? */
111static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
112{
113 return &pdev->dev;
114}
115
116enum {
117 /* various global constants */
118 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
119 ATA_MAX_PORTS = 8,
120 ATA_DEF_QUEUE = 1,
Tejun Heo2ab7db12006-05-15 20:58:02 +0900121 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900122 ATA_MAX_QUEUE = 32,
Tejun Heo2ab7db12006-05-15 20:58:02 +0900123 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 ATA_MAX_BUS = 2,
125 ATA_DEF_BUSY_WAIT = 10000,
126 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
127
128 ATA_SHT_EMULATED = 1,
129 ATA_SHT_CMD_PER_LUN = 1,
130 ATA_SHT_THIS_ID = -1,
Jeff Garzikcf482932005-10-22 00:19:33 -0400131 ATA_SHT_USE_CLUSTERING = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133 /* struct ata_device stuff */
Tejun Heo949b38a2006-04-02 18:51:52 +0900134 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
135 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
Jeff Garzik029f5462006-04-02 10:30:40 -0400136 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
Tejun Heo88e49032006-05-15 21:03:38 +0900137 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
Tejun Heo6fc49ad2006-11-11 20:10:45 +0900138 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
Tejun Heoea1dd4e2006-04-02 18:51:53 +0900139 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
Tejun Heo949b38a2006-04-02 18:51:52 +0900140
Tejun Heoe5c9e082006-09-30 19:44:39 +0900141 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
Tejun Heo33435712006-10-19 14:44:53 +0900142 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
Tejun Heoe5c9e082006-09-30 19:44:39 +0900143 ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */
Tejun Heo72fa4b72006-05-31 18:27:32 +0900144 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Tejun Heoabdda732006-05-31 18:27:29 +0900146 ATA_DFLAG_DETACH = (1 << 16),
147 ATA_DFLAG_DETACHED = (1 << 17),
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 ATA_DEV_UNKNOWN = 0, /* unknown device */
150 ATA_DEV_ATA = 1, /* ATA device */
151 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
152 ATA_DEV_ATAPI = 3, /* ATAPI device */
153 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
154 ATA_DEV_NONE = 5, /* no device */
155
156 /* struct ata_port flags */
Tejun Heo949b38a2006-04-02 18:51:52 +0900157 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 /* (doesn't imply presence) */
Tejun Heo949b38a2006-04-02 18:51:52 +0900159 ATA_FLAG_SATA = (1 << 1),
160 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
161 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
162 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
163 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
164 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
165 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
166 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
Tejun Heo7395acb2006-05-31 18:27:25 +0900167 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
168 * doesn't handle PIO interrupts */
169 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
Tejun Heoabdda732006-05-31 18:27:29 +0900170 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
171 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
172 * Register FIS clearing BSY */
Tejun Heo7395acb2006-05-31 18:27:25 +0900173 ATA_FLAG_DEBUGMSG = (1 << 13),
Tejun Heo800b3992006-12-03 21:34:13 +0900174 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
Tejun Heob2a8bbe2007-01-25 19:40:05 +0900175 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
Alan Coxf834e492007-02-07 13:46:00 -0800176 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
Jens Axboe9b847542006-01-06 09:28:07 +0100177
Tejun Heob51e9e52006-06-29 01:29:30 +0900178 /* The following flag belongs to ap->pflags but is kept in
179 * ap->flags because it's referenced in many LLDs and will be
180 * removed in not-too-distant future.
181 */
182 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
Tejun Heo9ec957f2006-05-15 20:57:58 +0900183
Tejun Heob51e9e52006-06-29 01:29:30 +0900184 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
Alan Cox8d238e02006-01-17 20:50:31 +0000185
Tejun Heob51e9e52006-06-29 01:29:30 +0900186 /* struct ata_port pflags */
187 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
188 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
189 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
190 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
191 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
192 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
193 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
194
195 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
196 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
Tejun Heo500530f2006-07-03 16:07:27 +0900197 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
Tejun Heodde44582006-02-02 00:56:10 +0900198
Tejun Heo949b38a2006-04-02 18:51:52 +0900199 /* struct ata_queued_cmd flags */
200 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
201 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
202 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
Tejun Heo27197362006-04-02 18:51:53 +0900204 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
Tejun Heoe61e0672006-05-15 20:57:40 +0900205 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
206
Tejun Heo9ec957f2006-05-15 20:57:58 +0900207 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
208 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
209 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
Alan Cox4e5ec5d2006-03-27 18:42:40 +0100211 /* host set flags */
Jeff Garzikcca39742006-08-24 03:19:22 -0400212 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
Jeff Garzik9bec2e32006-08-31 00:02:15 -0400213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 /* various lengths of time */
Alan Cox8d238e02006-01-17 20:50:31 +0000215 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
216 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
Tejun Heoa2a7a662005-12-13 14:48:31 +0900217 ATA_TMOUT_INTERNAL = 30 * HZ,
218 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
220 /* ATA bus states */
221 BUS_UNKNOWN = 0,
222 BUS_DMA = 1,
223 BUS_IDLE = 2,
224 BUS_NOINTR = 3,
225 BUS_NODATA = 4,
226 BUS_TIMER = 5,
227 BUS_PIO = 6,
228 BUS_EDD = 7,
229 BUS_IDENTIFY = 8,
230 BUS_PACKET = 9,
231
232 /* SATA port states */
233 PORT_UNKNOWN = 0,
234 PORT_ENABLED = 1,
235 PORT_DISABLED = 2,
236
237 /* encoding various smaller bitmaps into a single
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900238 * unsigned int bitmap
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 */
Alan Coxb352e572006-08-10 18:52:12 +0100240 ATA_BITS_PIO = 7,
241 ATA_BITS_MWDMA = 5,
Tejun Heo1da7b0d2006-03-06 04:31:56 +0900242 ATA_BITS_UDMA = 8,
243
244 ATA_SHIFT_PIO = 0,
245 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
246 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
247
248 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
249 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
250 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400251
252 /* size of buffer to pad xfers ending on unaligned boundaries */
253 ATA_DMA_PAD_SZ = 4,
254 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
Tejun Heo949b38a2006-04-02 18:51:52 +0900255
256 /* masks for port functions */
Alan Cox47a86592005-10-04 08:09:19 -0400257 ATA_PORT_PRIMARY = (1 << 0),
258 ATA_PORT_SECONDARY = (1 << 1),
Tejun Heo14d2bac2006-04-02 17:54:46 +0900259
Tejun Heo0c247c52006-05-15 20:58:19 +0900260 /* ering size */
261 ATA_ERING_SIZE = 32,
262
Tejun Heof3e81b12006-05-15 20:58:21 +0900263 /* desc_len for ata_eh_info and context */
264 ATA_EH_DESC_LEN = 80,
265
Tejun Heo9be1e972006-05-15 20:58:17 +0900266 /* reset / recovery action types */
267 ATA_EH_REVALIDATE = (1 << 0),
268 ATA_EH_SOFTRESET = (1 << 1),
269 ATA_EH_HARDRESET = (1 << 2),
Tejun Heo02670bf2006-07-03 16:07:26 +0900270 ATA_EH_SUSPEND = (1 << 3),
271 ATA_EH_RESUME = (1 << 4),
272 ATA_EH_PM_FREEZE = (1 << 5),
Tejun Heo9be1e972006-05-15 20:58:17 +0900273
274 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
Tejun Heo02670bf2006-07-03 16:07:26 +0900275 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
276 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
Tejun Heo9be1e972006-05-15 20:58:17 +0900277
Tejun Heof3e81b12006-05-15 20:58:21 +0900278 /* ata_eh_info->flags */
Tejun Heoabdda732006-05-31 18:27:29 +0900279 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
Tejun Heo13abf502006-07-10 23:18:46 +0900280 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
Tejun Heo1cdaf532006-07-03 16:07:26 +0900281 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
282 ATA_EHI_QUIET = (1 << 3), /* be quiet */
Tejun Heoabdda732006-05-31 18:27:29 +0900283
284 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
Tejun Heoefdaedc2006-11-01 18:38:52 +0900285 ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */
Tejun Heobaa1e782006-11-01 18:39:27 +0900286 ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */
287 ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */
Tejun Heof3e81b12006-05-15 20:58:21 +0900288
Tejun Heo13abf502006-07-10 23:18:46 +0900289 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
290
Tejun Heoad9e2762006-05-15 20:58:12 +0900291 /* max repeat if error condition is still set after ->error_handler */
292 ATA_EH_MAX_REPEAT = 5,
293
Tejun Heo14d2bac2006-04-02 17:54:46 +0900294 /* how hard are we gonna try to probe/recover devices */
295 ATA_PROBE_MAX_TRIES = 3,
Tejun Heo022bdb02006-05-15 20:58:22 +0900296 ATA_EH_RESET_TRIES = 3,
297 ATA_EH_DEV_TRIES = 3,
Tejun Heof5914a42006-05-31 18:27:48 +0900298
299 /* Drive spinup time (time from power-on to the first D2H FIS)
300 * in msecs - 8s currently. Failing to get ready in this time
301 * isn't critical. It will result in reset failure for
302 * controllers which can't wait for the first D2H FIS. libata
303 * will retry, so it just has to be long enough to spin up
304 * most devices.
305 */
306 ATA_SPINUP_WAIT = 8000,
Jeff Garzikf20b16f2006-12-11 11:14:06 -0500307
Alan Cox93590852006-09-12 16:55:12 +0100308 /* Horkage types. May be set by libata or controller on drives
309 (some horkage may be drive/controller pair dependant */
310
311 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
Alan Cox6919a0a2006-10-27 19:08:46 -0700312 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
313 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314};
315
Albert Lee14be71f2005-09-27 17:36:35 +0800316enum hsm_task_states {
Albert Leec56b14d22005-09-30 19:07:39 +0800317 HSM_ST_IDLE, /* no command on going */
Albert Leec56b14d22005-09-30 19:07:39 +0800318 HSM_ST, /* (waiting the device to) transfer data */
319 HSM_ST_LAST, /* (waiting the device to) complete command */
Albert Leec56b14d22005-09-30 19:07:39 +0800320 HSM_ST_ERR, /* error */
321 HSM_ST_FIRST, /* (waiting the device to)
322 write CDB or first data block */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323};
324
Jeff Garzika7dac442005-10-30 04:44:42 -0500325enum ata_completion_errors {
Tejun Heo11a56d22006-01-23 13:09:36 +0900326 AC_ERR_DEV = (1 << 0), /* device reported error */
327 AC_ERR_HSM = (1 << 1), /* host state machine violation */
328 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
329 AC_ERR_MEDIA = (1 << 3), /* media error */
330 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
331 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
332 AC_ERR_SYSTEM = (1 << 6), /* system error */
333 AC_ERR_INVALID = (1 << 7), /* invalid argument */
334 AC_ERR_OTHER = (1 << 8), /* unknown */
Tejun Heo55a8e2c2006-11-10 18:08:10 +0900335 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
Jeff Garzika7dac442005-10-30 04:44:42 -0500336};
337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338/* forward declarations */
339struct scsi_device;
340struct ata_port_operations;
341struct ata_port;
342struct ata_queued_cmd;
343
344/* typedefs */
Tejun Heo77853bf2006-01-23 13:09:36 +0900345typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
Tejun Heof5914a42006-05-31 18:27:48 +0900346typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
347typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
348typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
350struct ata_ioports {
Tejun Heo0d5ff562007-02-01 15:06:36 +0900351 void __iomem *cmd_addr;
352 void __iomem *data_addr;
353 void __iomem *error_addr;
354 void __iomem *feature_addr;
355 void __iomem *nsect_addr;
356 void __iomem *lbal_addr;
357 void __iomem *lbam_addr;
358 void __iomem *lbah_addr;
359 void __iomem *device_addr;
360 void __iomem *status_addr;
361 void __iomem *command_addr;
362 void __iomem *altstatus_addr;
363 void __iomem *ctl_addr;
364 void __iomem *bmdma_addr;
365 void __iomem *scr_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366};
367
368struct ata_probe_ent {
369 struct list_head node;
370 struct device *dev;
Jeff Garzik057ace52005-10-22 14:27:05 -0400371 const struct ata_port_operations *port_ops;
Jeff Garzik193515d2005-11-07 00:59:37 -0500372 struct scsi_host_template *sht;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 struct ata_ioports port[ATA_MAX_PORTS];
374 unsigned int n_ports;
Tejun Heodd5b06c2006-08-10 16:59:12 +0900375 unsigned int dummy_port_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 unsigned int pio_mask;
377 unsigned int mwdma_mask;
378 unsigned int udma_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 unsigned long irq;
Alan Cox2ec7df02006-08-10 16:59:10 +0900380 unsigned long irq2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 unsigned int irq_flags;
Jeff Garzikcca39742006-08-24 03:19:22 -0400382 unsigned long port_flags;
383 unsigned long _host_flags;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900384 void __iomem * const *iomap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 void *private_data;
Tejun Heofea63e32006-09-16 03:04:15 +0900386
387 /* port_info for the secondary port. Together with irq2, it's
388 * used to implement non-uniform secondary port. Currently,
389 * the only user is ata_piix combined mode. This workaround
390 * will be removed together with ata_probe_ent when init model
391 * is updated.
392 */
393 const struct ata_port_info *pinfo2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394};
395
Jeff Garzikcca39742006-08-24 03:19:22 -0400396struct ata_host {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 spinlock_t lock;
398 struct device *dev;
399 unsigned long irq;
Alan Cox2ec7df02006-08-10 16:59:10 +0900400 unsigned long irq2;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900401 void __iomem * const *iomap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 unsigned int n_ports;
403 void *private_data;
Jeff Garzik057ace52005-10-22 14:27:05 -0400404 const struct ata_port_operations *ops;
Alan Cox5444a6f2006-03-27 18:58:20 +0100405 unsigned long flags;
Alan032af1c2007-03-01 17:36:46 +0000406 struct ata_port *simplex_claimed; /* channel owning the DMA */
Tejun Heof0eb62b2006-06-12 23:05:38 +0900407 struct ata_port *ports[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408};
409
410struct ata_queued_cmd {
411 struct ata_port *ap;
412 struct ata_device *dev;
413
414 struct scsi_cmnd *scsicmd;
415 void (*scsidone)(struct scsi_cmnd *);
416
417 struct ata_taskfile tf;
418 u8 cdb[ATAPI_CDB_LEN];
419
420 unsigned long flags; /* ATA_QCFLAG_xxx */
421 unsigned int tag;
422 unsigned int n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400423 unsigned int orig_n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
425 int dma_dir;
426
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400427 unsigned int pad_len;
428
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 unsigned int nbytes;
430 unsigned int curbytes;
431
432 unsigned int cursg;
433 unsigned int cursg_ofs;
434
435 struct scatterlist sgent;
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400436 struct scatterlist pad_sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 void *buf_virt;
438
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400439 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
440 struct scatterlist *__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
Albert Leea22e2eb2005-12-05 15:38:02 +0800442 unsigned int err_mask;
Tejun Heoe61e0672006-05-15 20:57:40 +0900443 struct ata_taskfile result_tf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 ata_qc_cb_t complete_fn;
445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 void *private_data;
447};
448
Jeff Garzikcca39742006-08-24 03:19:22 -0400449struct ata_port_stats {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 unsigned long unhandled_irq;
451 unsigned long idle_irq;
452 unsigned long rw_reqbuf;
453};
454
Tejun Heo0c247c52006-05-15 20:58:19 +0900455struct ata_ering_entry {
456 int is_io;
457 unsigned int err_mask;
458 u64 timestamp;
459};
460
461struct ata_ering {
462 int cursor;
463 struct ata_ering_entry ring[ATA_ERING_SIZE];
464};
465
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466struct ata_device {
Tejun Heo38d87232006-05-15 20:57:51 +0900467 struct ata_port *ap;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 unsigned int devno; /* 0 or 1 */
Tejun Heo72fa4b72006-05-31 18:27:32 +0900469 unsigned long flags; /* ATA_DFLAG_xxx */
Tejun Heo3edebac2006-05-31 18:27:40 +0900470 struct scsi_device *sdev; /* attached SCSI device */
Tejun Heo72fa4b72006-05-31 18:27:32 +0900471 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
472 u64 n_sectors; /* size of device, if ATA */
473 unsigned int class; /* ATA_DEV_xxx */
Tejun Heofe635c72006-05-15 20:57:35 +0900474 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 u8 pio_mode;
476 u8 dma_mode;
477 u8 xfer_mode;
478 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
479
Albert Lee8cbd6df2005-10-12 15:06:27 +0800480 unsigned int multi_count; /* sectors count for
481 READ/WRITE MULTIPLE */
Tejun Heob00eec12006-02-12 23:32:59 +0900482 unsigned int max_sectors; /* per-device max sectors */
Tejun Heo6e7846e2006-02-12 23:32:58 +0900483 unsigned int cdb_len;
Albert Lee8bf62ece2005-05-12 15:29:42 -0400484
Tejun Heoacf356b2006-03-24 14:07:50 +0900485 /* per-dev xfer mask */
486 unsigned int pio_mask;
487 unsigned int mwdma_mask;
488 unsigned int udma_mask;
489
Albert Lee8bf62ece2005-05-12 15:29:42 -0400490 /* for CHS addressing */
491 u16 cylinders; /* Number of cylinders */
492 u16 heads; /* Number of heads */
493 u16 sectors; /* Number of sectors per track */
Tejun Heo0c247c52006-05-15 20:58:19 +0900494
495 /* error history */
496 struct ata_ering ering;
Tejun Heo7d47e8d2007-02-02 16:22:31 +0900497 int spdn_cnt;
Alan Cox93590852006-09-12 16:55:12 +0100498 unsigned int horkage; /* List of broken features */
Kristen Carlson Accardi11ef6972006-09-28 11:29:01 -0700499#ifdef CONFIG_SATA_ACPI
500 /* ACPI objects info */
501 acpi_handle obj_handle;
502#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503};
504
Tejun Heo72fa4b72006-05-31 18:27:32 +0900505/* Offset into struct ata_device. Fields above it are maintained
506 * acress device init. Fields below are zeroed.
507 */
508#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
509
Tejun Heof3e81b12006-05-15 20:58:21 +0900510struct ata_eh_info {
511 struct ata_device *dev; /* offending device */
512 u32 serror; /* SError from LLDD */
513 unsigned int err_mask; /* port-wide err_mask */
514 unsigned int action; /* ATA_EH_* action mask */
Tejun Heo47005f22006-06-19 18:27:23 +0900515 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
Tejun Heof3e81b12006-05-15 20:58:21 +0900516 unsigned int flags; /* ATA_EHI_* flags */
Tejun Heoabdda732006-05-31 18:27:29 +0900517
518 unsigned long hotplug_timestamp;
519 unsigned int probe_mask;
520
Tejun Heof3e81b12006-05-15 20:58:21 +0900521 char desc[ATA_EH_DESC_LEN];
522 int desc_len;
523};
524
525struct ata_eh_context {
526 struct ata_eh_info i;
527 int tries[ATA_MAX_DEVICES];
Tejun Heoabdda732006-05-31 18:27:29 +0900528 unsigned int classes[ATA_MAX_DEVICES];
529 unsigned int did_probe_mask;
Tejun Heof3e81b12006-05-15 20:58:21 +0900530};
531
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532struct ata_port {
Jeff Garzikcca39742006-08-24 03:19:22 -0400533 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
Jeff Garzik057ace52005-10-22 14:27:05 -0400534 const struct ata_port_operations *ops;
Jeff Garzikba6a1302006-06-22 23:46:10 -0400535 spinlock_t *lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 unsigned long flags; /* ATA_FLAG_xxx */
Tejun Heob51e9e52006-06-29 01:29:30 +0900537 unsigned int pflags; /* ATA_PFLAG_xxx */
Tejun Heo44877b42007-02-21 01:06:51 +0900538 unsigned int print_id; /* user visible unique port ID */
539 unsigned int port_no; /* 0 based port no. inside the host */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
541 struct ata_prd *prd; /* our SG list */
542 dma_addr_t prd_dma; /* and its DMA mapping */
543
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400544 void *pad; /* array of DMA pad buffers */
545 dma_addr_t pad_dma;
546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
548
549 u8 ctl; /* cache of ATA control register */
550 u8 last_ctl; /* Cache last written value */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 unsigned int pio_mask;
552 unsigned int mwdma_mask;
553 unsigned int udma_mask;
554 unsigned int cbl; /* cable type; ATA_CBL_xxx */
Tejun Heo5a04bf42006-05-31 18:27:38 +0900555 unsigned int hw_sata_spd_limit;
Tejun Heo1c3fae42006-04-02 20:53:28 +0900556 unsigned int sata_spd_limit; /* SATA PHY speed limit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
Jeff Garzikcca39742006-08-24 03:19:22 -0400558 /* record runtime error info, protected by host lock */
Tejun Heof3e81b12006-05-15 20:58:21 +0900559 struct ata_eh_info eh_info;
560 /* EH context owned by EH */
561 struct ata_eh_context eh_context;
562
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 struct ata_device device[ATA_MAX_DEVICES];
564
565 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
Tejun Heo6cec4a32006-05-15 21:03:41 +0900566 unsigned long qc_allocated;
Tejun Heodedaf2b2006-05-15 21:03:43 +0900567 unsigned int qc_active;
568
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 unsigned int active_tag;
Tejun Heodedaf2b2006-05-15 21:03:43 +0900570 u32 sactive;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
Jeff Garzikcca39742006-08-24 03:19:22 -0400572 struct ata_port_stats stats;
573 struct ata_host *host;
Brian King2f1f6102006-03-23 17:30:15 -0600574 struct device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575
David Howells65f27f32006-11-22 14:55:48 +0000576 void *port_task_data;
David Howells52bad642006-11-22 14:54:01 +0000577 struct delayed_work port_task;
578 struct delayed_work hotplug_task;
Jeff Garzik3b01b8a2006-06-12 00:22:04 -0400579 struct work_struct scsi_rescan_task;
Tejun Heo86e45b62006-03-05 15:29:09 +0900580
Albert Lee14be71f2005-09-27 17:36:35 +0800581 unsigned int hsm_task_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
Randy Dunlapbfd60572006-01-17 19:34:42 -0500583 u32 msg_enable;
Tejun Heoa72ec4c2006-01-23 13:09:37 +0900584 struct list_head eh_done_q;
Tejun Heoc6cf9e92006-05-31 18:27:27 +0900585 wait_queue_head_t eh_wait_q;
Randy Dunlapbfd60572006-01-17 19:34:42 -0500586
Tejun Heo500530f2006-07-03 16:07:27 +0900587 pm_message_t pm_mesg;
588 int *pm_result;
589
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 void *private_data;
Tejun Heofe635c72006-05-15 20:57:35 +0900591
592 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593};
594
595struct ata_port_operations {
596 void (*port_disable) (struct ata_port *);
597
598 void (*dev_config) (struct ata_port *, struct ata_device *);
599
600 void (*set_piomode) (struct ata_port *, struct ata_device *);
601 void (*set_dmamode) (struct ata_port *, struct ata_device *);
Alan Cox5444a6f2006-03-27 18:58:20 +0100602 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
Jeff Garzik057ace52005-10-22 14:27:05 -0400604 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
606
Jeff Garzik057ace52005-10-22 14:27:05 -0400607 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 u8 (*check_status)(struct ata_port *ap);
609 u8 (*check_altstatus)(struct ata_port *ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 void (*dev_select)(struct ata_port *ap, unsigned int device);
611
Tejun Heoc19ba8a2006-01-24 17:05:22 +0900612 void (*phy_reset) (struct ata_port *ap); /* obsolete */
Alanb229a7b2007-01-24 11:47:07 +0000613 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev);
Tejun Heoc19ba8a2006-01-24 17:05:22 +0900614
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 void (*post_set_mode) (struct ata_port *ap);
616
Alanb229a7b2007-01-24 11:47:07 +0000617 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
619 void (*bmdma_setup) (struct ata_queued_cmd *qc);
620 void (*bmdma_start) (struct ata_queued_cmd *qc);
621
Alan Coxa6b2c5d2006-05-22 16:59:59 +0100622 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
623
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 void (*qc_prep) (struct ata_queued_cmd *qc);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +0900625 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626
Tejun Heo9ec957f2006-05-15 20:57:58 +0900627 /* Error handlers. ->error_handler overrides ->eng_timeout and
628 * indicates that new-style EH is in place.
629 */
630 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
631
632 void (*freeze) (struct ata_port *ap);
633 void (*thaw) (struct ata_port *ap);
634 void (*error_handler) (struct ata_port *ap);
635 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
David Howells7d12e782006-10-05 14:55:46 +0100637 irq_handler_t irq_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 void (*irq_clear) (struct ata_port *);
Akira Iguchi83625002007-01-26 16:27:32 +0900639 u8 (*irq_on) (struct ata_port *);
640 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641
642 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
643 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
644 u32 val);
645
Tejun Heo500530f2006-07-03 16:07:27 +0900646 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
647 int (*port_resume) (struct ata_port *ap);
648
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 int (*port_start) (struct ata_port *ap);
650 void (*port_stop) (struct ata_port *ap);
651
Jeff Garzikcca39742006-08-24 03:19:22 -0400652 void (*host_stop) (struct ata_host *host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
Alan Coxb73fc892005-08-26 16:03:19 +0100654 void (*bmdma_stop) (struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 u8 (*bmdma_status) (struct ata_port *ap);
656};
657
658struct ata_port_info {
Christoph Hellwigd0be4a7d2005-10-31 18:31:40 +0100659 struct scsi_host_template *sht;
Jeff Garzikcca39742006-08-24 03:19:22 -0400660 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 unsigned long pio_mask;
662 unsigned long mwdma_mask;
663 unsigned long udma_mask;
Jeff Garzik057ace52005-10-22 14:27:05 -0400664 const struct ata_port_operations *port_ops;
Alan Coxe99f8b52005-11-08 14:09:44 +0000665 void *private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666};
667
Alan Cox452503f2005-10-21 19:01:32 -0400668struct ata_timing {
669 unsigned short mode; /* ATA mode */
670 unsigned short setup; /* t1 */
671 unsigned short act8b; /* t2 for 8-bit I/O */
672 unsigned short rec8b; /* t2i for 8-bit I/O */
673 unsigned short cyc8b; /* t0 for 8-bit I/O */
674 unsigned short active; /* t2 or tD */
675 unsigned short recover; /* t2i or tK */
676 unsigned short cycle; /* t0 */
677 unsigned short udma; /* t2CYCTYP/2 */
678};
679
680#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681
Tejun Heoe9c83912006-07-03 16:07:26 +0900682extern const unsigned long sata_deb_timing_normal[];
683extern const unsigned long sata_deb_timing_hotplug[];
684extern const unsigned long sata_deb_timing_long[];
685
Tejun Heodd5b06c2006-08-10 16:59:12 +0900686extern const struct ata_port_operations ata_dummy_port_ops;
687
Tejun Heoe9c83912006-07-03 16:07:26 +0900688static inline const unsigned long *
689sata_ehc_deb_timing(struct ata_eh_context *ehc)
690{
691 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
692 return sata_deb_timing_hotplug;
693 else
694 return sata_deb_timing_normal;
695}
Tejun Heod7bb4cc2006-05-31 18:27:46 +0900696
Tejun Heodd5b06c2006-08-10 16:59:12 +0900697static inline int ata_port_is_dummy(struct ata_port *ap)
698{
699 return ap->ops == &ata_dummy_port_ops;
700}
701
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702extern void ata_port_probe(struct ata_port *);
703extern void __sata_phy_reset(struct ata_port *ap);
704extern void sata_phy_reset(struct ata_port *ap);
705extern void ata_bus_reset(struct ata_port *ap);
Tejun Heo3c567b72006-05-15 20:57:23 +0900706extern int sata_set_spd(struct ata_port *ap);
Tejun Heod7bb4cc2006-05-31 18:27:46 +0900707extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
708extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
Tejun Heof5914a42006-05-31 18:27:48 +0900709extern int ata_std_prereset(struct ata_port *ap);
Tejun Heo2bf2cb22006-04-11 22:16:45 +0900710extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
Tejun Heob6103f62006-11-01 17:59:53 +0900711extern int sata_port_hardreset(struct ata_port *ap,
712 const unsigned long *timing);
Tejun Heo2bf2cb22006-04-11 22:16:45 +0900713extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
Tejun Heoc2bd5802006-01-24 17:05:22 +0900714extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715extern void ata_port_disable(struct ata_port *);
716extern void ata_std_ports(struct ata_ioports *ioaddr);
717#ifdef CONFIG_PCI
718extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
719 unsigned int n_ports);
720extern void ata_pci_remove_one (struct pci_dev *pdev);
Tejun Heo6ffa01d2007-03-02 17:32:47 +0900721#ifdef CONFIG_PM
Tejun Heo3c5100c2006-07-26 16:58:33 +0900722extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
Tejun Heo553c4aa2006-12-26 19:39:50 +0900723extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
Tejun Heo3c5100c2006-07-26 16:58:33 +0900724extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
Jens Axboe9b847542006-01-06 09:28:07 +0100725extern int ata_pci_device_resume(struct pci_dev *pdev);
Tejun Heo6ffa01d2007-03-02 17:32:47 +0900726#endif
Jeff Garzik17bb34a2006-03-21 21:29:21 -0500727extern int ata_pci_clear_simplex(struct pci_dev *pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728#endif /* CONFIG_PCI */
Jeff Garzik057ace52005-10-22 14:27:05 -0400729extern int ata_device_add(const struct ata_probe_ent *ent);
Tejun Heo0529c152007-01-20 16:00:26 +0900730extern void ata_host_detach(struct ata_host *host);
Jeff Garzikcca39742006-08-24 03:19:22 -0400731extern void ata_host_init(struct ata_host *, struct device *,
732 unsigned long, const struct ata_port_operations *);
Jeff Garzik193515d2005-11-07 00:59:37 -0500733extern int ata_scsi_detect(struct scsi_host_template *sht);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
735extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
Brian King80289162006-08-07 14:27:31 -0500736extern void ata_sas_port_destroy(struct ata_port *);
Jeff Garzikcca39742006-08-24 03:19:22 -0400737extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
Brian King80289162006-08-07 14:27:31 -0500738 struct ata_port_info *, struct Scsi_Host *);
739extern int ata_sas_port_init(struct ata_port *);
740extern int ata_sas_port_start(struct ata_port *ap);
741extern void ata_sas_port_stop(struct ata_port *ap);
742extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
743extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
744 struct ata_port *ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
Tejun Heo34bf2172006-05-15 20:57:46 +0900746extern int sata_scr_valid(struct ata_port *ap);
747extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
748extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
749extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
750extern int ata_port_online(struct ata_port *ap);
751extern int ata_port_offline(struct ata_port *ap);
Tejun Heo6ffa01d2007-03-02 17:32:47 +0900752#ifdef CONFIG_PM
Jens Axboe9b847542006-01-06 09:28:07 +0100753extern int ata_scsi_device_resume(struct scsi_device *);
Tejun Heo3c5100c2006-07-26 16:58:33 +0900754extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
Jeff Garzikcca39742006-08-24 03:19:22 -0400755extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
756extern void ata_host_resume(struct ata_host *host);
Tejun Heo6ffa01d2007-03-02 17:32:47 +0900757#endif
Jeff Garzik67846b32005-10-05 02:58:32 -0400758extern int ata_ratelimit(void);
Tejun Heod1adc1b2006-10-09 18:32:15 +0900759extern int ata_busy_sleep(struct ata_port *ap,
760 unsigned long timeout_pat, unsigned long timeout);
David Howells65f27f32006-11-22 14:55:48 +0000761extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
Tejun Heo86e45b62006-03-05 15:29:09 +0900762 void *data, unsigned long delay);
Tejun Heoc22daff2006-04-11 22:22:29 +0900763extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
764 unsigned long interval_msec,
765 unsigned long timeout_msec);
Akira Iguchia619f981b2007-01-26 16:28:18 +0900766extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
Jeff Garzik67846b32005-10-05 02:58:32 -0400767
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768/*
769 * Default driver ops implementations
770 */
Jeff Garzik057ace52005-10-22 14:27:05 -0400771extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
Jeff Garzik057ace52005-10-22 14:27:05 -0400773extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
774extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
776extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
777extern u8 ata_check_status(struct ata_port *ap);
778extern u8 ata_altstatus(struct ata_port *ap);
Jeff Garzik057ace52005-10-22 14:27:05 -0400779extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780extern int ata_port_start (struct ata_port *ap);
David Howells7d12e782006-10-05 14:55:46 +0100781extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
Tejun Heo0d5ff562007-02-01 15:06:36 +0900782extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
783 unsigned int buflen, int write_data);
784extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
785 unsigned int buflen, int write_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786extern void ata_qc_prep(struct ata_queued_cmd *qc);
Brian Kinge46834c2006-03-17 17:04:03 -0600787extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +0900788extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
790 unsigned int buflen);
791extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
792 unsigned int n_elem);
Jeff Garzik057ace52005-10-22 14:27:05 -0400793extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
Alan10305f02007-02-20 18:01:59 +0000794extern void ata_dev_disable(struct ata_device *adev);
Tejun Heo6a62a042006-02-13 10:02:46 +0900795extern void ata_id_string(const u16 *id, unsigned char *s,
796 unsigned int ofs, unsigned int len);
797extern void ata_id_c_string(const u16 *id, unsigned char *s,
798 unsigned int ofs, unsigned int len);
Alan10305f02007-02-20 18:01:59 +0000799extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
Alan Cox6919a0a2006-10-27 19:08:46 -0700800extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
802extern void ata_bmdma_start (struct ata_queued_cmd *qc);
Alan Coxb73fc892005-08-26 16:03:19 +0100803extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804extern u8 ata_bmdma_status(struct ata_port *ap);
805extern void ata_bmdma_irq_clear(struct ata_port *ap);
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900806extern void ata_bmdma_freeze(struct ata_port *ap);
807extern void ata_bmdma_thaw(struct ata_port *ap);
Tejun Heof5914a42006-05-31 18:27:48 +0900808extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
Tejun Heo6d97dbd2006-05-15 20:58:24 +0900809 ata_reset_fn_t softreset,
810 ata_reset_fn_t hardreset,
811 ata_postreset_fn_t postreset);
812extern void ata_bmdma_error_handler(struct ata_port *ap);
813extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
Tejun Heo9a1004d2006-05-31 18:27:52 +0900814extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
815 u8 status, int in_wq);
Tejun Heof686bcb2006-05-15 20:58:05 +0900816extern void ata_qc_complete(struct ata_queued_cmd *qc);
Tejun Heodedaf2b2006-05-15 21:03:43 +0900817extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
818 void (*finish_qc)(struct ata_queued_cmd *));
Tejun Heo3373efd2006-05-15 20:57:53 +0900819extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 void (*done)(struct scsi_cmnd *));
821extern int ata_std_bios_param(struct scsi_device *sdev,
822 struct block_device *bdev,
823 sector_t capacity, int geom[]);
824extern int ata_scsi_slave_config(struct scsi_device *sdev);
Tejun Heo83c47bc2006-05-31 18:28:07 +0900825extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
Tejun Heoa6e6ce82006-05-15 21:03:48 +0900826extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
827 int queue_depth);
Tejun Heo3373efd2006-05-15 20:57:53 +0900828extern struct ata_device *ata_dev_pair(struct ata_device *adev);
Akira Iguchi83625002007-01-26 16:27:32 +0900829extern u8 ata_irq_on(struct ata_port *ap);
830extern u8 ata_dummy_irq_on(struct ata_port *ap);
831extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
832extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
Alan Cox452503f2005-10-21 19:01:32 -0400834/*
835 * Timing helpers
836 */
Alan Cox1bc4ccf2006-01-09 17:18:14 +0000837
838extern unsigned int ata_pio_need_iordy(const struct ata_device *);
Alan Cox452503f2005-10-21 19:01:32 -0400839extern int ata_timing_compute(struct ata_device *, unsigned short,
840 struct ata_timing *, int, int);
841extern void ata_timing_merge(const struct ata_timing *,
842 const struct ata_timing *, struct ata_timing *,
843 unsigned int);
844
845enum {
846 ATA_TIMING_SETUP = (1 << 0),
847 ATA_TIMING_ACT8B = (1 << 1),
848 ATA_TIMING_REC8B = (1 << 2),
849 ATA_TIMING_CYC8B = (1 << 3),
850 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
851 ATA_TIMING_CYC8B,
852 ATA_TIMING_ACTIVE = (1 << 4),
853 ATA_TIMING_RECOVER = (1 << 5),
854 ATA_TIMING_CYCLE = (1 << 6),
855 ATA_TIMING_UDMA = (1 << 7),
856 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
857 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
858 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
859 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
860};
861
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862
863#ifdef CONFIG_PCI
864struct pci_bits {
865 unsigned int reg; /* PCI config register to read */
866 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
867 unsigned long mask;
868 unsigned long val;
869};
870
871extern struct ata_probe_ent *
Alan Cox47a86592005-10-04 08:09:19 -0400872ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
Jeff Garzik057ace52005-10-22 14:27:05 -0400873extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
Jeff Garzik17bb34a2006-03-21 21:29:21 -0500874extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875#endif /* CONFIG_PCI */
876
Tejun Heoece1d632006-04-02 18:51:53 +0900877/*
878 * EH
879 */
Tejun Heoece1d632006-04-02 18:51:53 +0900880extern void ata_eng_timeout(struct ata_port *ap);
Tejun Heo7b70fc02006-05-15 20:58:07 +0900881
882extern void ata_port_schedule_eh(struct ata_port *ap);
883extern int ata_port_abort(struct ata_port *ap);
Tejun Heoe3180492006-05-15 20:58:09 +0900884extern int ata_port_freeze(struct ata_port *ap);
885
886extern void ata_eh_freeze_port(struct ata_port *ap);
887extern void ata_eh_thaw_port(struct ata_port *ap);
Tejun Heo7b70fc02006-05-15 20:58:07 +0900888
Tejun Heoece1d632006-04-02 18:51:53 +0900889extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
890extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
891
Tejun Heof5914a42006-05-31 18:27:48 +0900892extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
893 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
894 ata_postreset_fn_t postreset);
Tejun Heo022bdb02006-05-15 20:58:22 +0900895
Tejun Heo61440db2006-05-15 20:57:55 +0900896/*
897 * printk helpers
898 */
899#define ata_port_printk(ap, lv, fmt, args...) \
Tejun Heo44877b42007-02-21 01:06:51 +0900900 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901
Tejun Heo61440db2006-05-15 20:57:55 +0900902#define ata_dev_printk(dev, lv, fmt, args...) \
Tejun Heo44877b42007-02-21 01:06:51 +0900903 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args)
Tejun Heo61440db2006-05-15 20:57:55 +0900904
905/*
Tejun Heof3e81b12006-05-15 20:58:21 +0900906 * ata_eh_info helpers
907 */
908#define ata_ehi_push_desc(ehi, fmt, args...) do { \
909 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
910 ATA_EH_DESC_LEN - (ehi)->desc_len, \
911 fmt , ##args); \
912} while (0)
913
914#define ata_ehi_clear_desc(ehi) do { \
915 (ehi)->desc[0] = '\0'; \
916 (ehi)->desc_len = 0; \
917} while (0)
918
Tejun Heoc0b6c032006-07-03 16:07:26 +0900919static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
Tejun Heo084fe632006-05-31 18:28:03 +0900920{
921 if (ehi->flags & ATA_EHI_HOTPLUGGED)
922 return;
923
Tejun Heo28324302006-07-03 16:07:26 +0900924 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
Tejun Heo084fe632006-05-31 18:28:03 +0900925 ehi->hotplug_timestamp = jiffies;
926
Tejun Heo084fe632006-05-31 18:28:03 +0900927 ehi->action |= ATA_EH_SOFTRESET;
928 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
929}
930
Tejun Heoc0b6c032006-07-03 16:07:26 +0900931static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
932{
933 __ata_ehi_hotplugged(ehi);
934 ehi->err_mask |= AC_ERR_ATA_BUS;
935}
936
Tejun Heof3e81b12006-05-15 20:58:21 +0900937/*
Tejun Heo61440db2006-05-15 20:57:55 +0900938 * qc helpers
939 */
Jeff Garzik972c26b2005-10-18 22:14:54 -0400940static inline int
941ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
942{
943 if (sg == &qc->pad_sgent)
944 return 1;
945 if (qc->pad_len)
946 return 0;
947 if (((sg - qc->__sg) + 1) == qc->n_elem)
948 return 1;
949 return 0;
950}
951
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400952static inline struct scatterlist *
Tejun Heocc1887f32006-02-20 23:48:38 +0900953ata_qc_first_sg(struct ata_queued_cmd *qc)
954{
955 if (qc->n_elem)
956 return qc->__sg;
957 if (qc->pad_len)
958 return &qc->pad_sgent;
959 return NULL;
960}
961
962static inline struct scatterlist *
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400963ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
964{
965 if (sg == &qc->pad_sgent)
966 return NULL;
967 if (++sg - qc->__sg < qc->n_elem)
968 return sg;
Tejun Heocc1887f32006-02-20 23:48:38 +0900969 if (qc->pad_len)
970 return &qc->pad_sgent;
971 return NULL;
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400972}
973
974#define ata_for_each_sg(sg, qc) \
Tejun Heocc1887f32006-02-20 23:48:38 +0900975 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400976
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977static inline unsigned int ata_tag_valid(unsigned int tag)
978{
979 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
980}
981
Tejun Heo2ab7db12006-05-15 20:58:02 +0900982static inline unsigned int ata_tag_internal(unsigned int tag)
983{
984 return tag == ATA_MAX_QUEUE - 1;
985}
986
Tejun Heo5806db22006-06-24 20:30:19 +0900987/*
988 * device helpers
989 */
Tejun Heoe1211e32006-04-01 01:38:18 +0900990static inline unsigned int ata_class_enabled(unsigned int class)
Tejun Heo597afd22006-03-01 01:25:38 +0900991{
992 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
993}
994
Tejun Heoe1211e32006-04-01 01:38:18 +0900995static inline unsigned int ata_class_disabled(unsigned int class)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996{
Tejun Heoe1211e32006-04-01 01:38:18 +0900997 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
998}
999
Tejun Heo002c8052006-04-02 17:54:46 +09001000static inline unsigned int ata_class_absent(unsigned int class)
1001{
1002 return !ata_class_enabled(class) && !ata_class_disabled(class);
1003}
1004
Tejun Heoe1211e32006-04-01 01:38:18 +09001005static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1006{
1007 return ata_class_enabled(dev->class);
1008}
1009
1010static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1011{
1012 return ata_class_disabled(dev->class);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013}
1014
Tejun Heo002c8052006-04-02 17:54:46 +09001015static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1016{
1017 return ata_class_absent(dev->class);
1018}
1019
Tejun Heo02670bf2006-07-03 16:07:26 +09001020static inline unsigned int ata_dev_ready(const struct ata_device *dev)
1021{
1022 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
1023}
1024
Tejun Heo5806db22006-06-24 20:30:19 +09001025/*
1026 * port helpers
1027 */
1028static inline int ata_port_max_devices(const struct ata_port *ap)
1029{
1030 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1031 return 2;
1032 return 1;
1033}
1034
1035
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036static inline u8 ata_chk_status(struct ata_port *ap)
1037{
1038 return ap->ops->check_status(ap);
1039}
1040
Tejun Heo6d1245b2007-02-20 23:20:27 +09001041/**
1042 * ata_ncq_enabled - Test whether NCQ is enabled
1043 * @dev: ATA device to test for
1044 *
1045 * LOCKING:
1046 * spin_lock_irqsave(host lock)
1047 *
1048 * RETURNS:
1049 * 1 if NCQ is enabled for @dev, 0 otherwise.
1050 */
1051static inline int ata_ncq_enabled(struct ata_device *dev)
1052{
1053 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1054 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1055}
Edward Falk0baab862005-06-02 18:17:13 -04001056
1057/**
1058 * ata_pause - Flush writes and pause 400 nanoseconds.
1059 * @ap: Port to wait for.
1060 *
1061 * LOCKING:
1062 * Inherited from caller.
1063 */
1064
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065static inline void ata_pause(struct ata_port *ap)
1066{
1067 ata_altstatus(ap);
1068 ndelay(400);
1069}
1070
Edward Falk0baab862005-06-02 18:17:13 -04001071
1072/**
1073 * ata_busy_wait - Wait for a port status register
1074 * @ap: Port to wait for.
Alan07777212007-01-31 17:47:24 +00001075 * @bits: bits that must be clear
1076 * @max: number of 10uS waits to perform
Edward Falk0baab862005-06-02 18:17:13 -04001077 *
1078 * Waits up to max*10 microseconds for the selected bits in the port's
1079 * status register to be cleared.
1080 * Returns final value of status register.
1081 *
1082 * LOCKING:
1083 * Inherited from caller.
1084 */
1085
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1087 unsigned int max)
1088{
1089 u8 status;
1090
1091 do {
1092 udelay(10);
1093 status = ata_chk_status(ap);
1094 max--;
Tejun Heod1adc1b2006-10-09 18:32:15 +09001095 } while (status != 0xff && (status & bits) && (max > 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096
1097 return status;
1098}
1099
Edward Falk0baab862005-06-02 18:17:13 -04001100
1101/**
1102 * ata_wait_idle - Wait for a port to be idle.
1103 * @ap: Port to wait for.
1104 *
1105 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1106 * Returns final value of status register.
1107 *
1108 * LOCKING:
1109 * Inherited from caller.
1110 */
1111
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112static inline u8 ata_wait_idle(struct ata_port *ap)
1113{
1114 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1115
Tejun Heod1adc1b2006-10-09 18:32:15 +09001116 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
Randy Dunlapbfd60572006-01-17 19:34:42 -05001117 if (ata_msg_warn(ap))
Tejun Heo0d5ff562007-02-01 15:06:36 +09001118 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n",
1119 status, ap->ioaddr.status_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 }
1121
1122 return status;
1123}
1124
1125static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1126{
1127 qc->tf.ctl |= ATA_NIEN;
1128}
1129
Tejun Heof69499f2006-05-15 20:58:03 +09001130static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1131 unsigned int tag)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132{
1133 if (likely(ata_tag_valid(tag)))
1134 return &ap->qcmd[tag];
1135 return NULL;
1136}
1137
Tejun Heof69499f2006-05-15 20:58:03 +09001138static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1139 unsigned int tag)
1140{
1141 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1142
1143 if (unlikely(!qc) || !ap->ops->error_handler)
1144 return qc;
1145
1146 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1147 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1148 return qc;
1149
1150 return NULL;
1151}
1152
Tejun Heo3373efd2006-05-15 20:57:53 +09001153static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154{
1155 memset(tf, 0, sizeof(*tf));
1156
Tejun Heo3373efd2006-05-15 20:57:53 +09001157 tf->ctl = dev->ap->ctl;
1158 if (dev->devno == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 tf->device = ATA_DEVICE_OBS;
1160 else
1161 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1162}
1163
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001164static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1165{
Tejun Heo501e0c502007-01-17 11:34:02 +09001166 qc->dma_dir = DMA_NONE;
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001167 qc->__sg = NULL;
1168 qc->flags = 0;
Tejun Heo726f0782007-01-03 17:30:39 +09001169 qc->cursg = qc->cursg_ofs = 0;
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001170 qc->nbytes = qc->curbytes = 0;
Brian King7a801182007-01-17 12:32:12 -06001171 qc->n_elem = 0;
Albert Leea22e2eb2005-12-05 15:38:02 +08001172 qc->err_mask = 0;
Brian Kingd0f29482007-01-17 12:32:28 -06001173 qc->pad_len = 0;
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001174
Tejun Heo3373efd2006-05-15 20:57:53 +09001175 ata_tf_init(qc->dev, &qc->tf);
Tejun Heoe61e0672006-05-15 20:57:40 +09001176
1177 /* init result_tf such that it indicates normal completion */
1178 qc->result_tf.command = ATA_DRDY;
1179 qc->result_tf.feature = 0;
Jeff Garzik2c13b7c2005-11-14 14:14:16 -05001180}
1181
Jeff Garzik057ace52005-10-22 14:27:05 -04001182static inline int ata_try_flush_cache(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183{
1184 return ata_id_wcache_enabled(dev->id) ||
1185 ata_id_has_flush(dev->id) ||
1186 ata_id_has_flush_ext(dev->id);
1187}
1188
Jeff Garzika7dac442005-10-30 04:44:42 -05001189static inline unsigned int ac_err_mask(u8 status)
1190{
Albert Lee3655d1d2006-05-19 11:43:04 +08001191 if (status & (ATA_BUSY | ATA_DRQ))
Tejun Heo11a56d22006-01-23 13:09:36 +09001192 return AC_ERR_HSM;
Jeff Garzika7dac442005-10-30 04:44:42 -05001193 if (status & (ATA_ERR | ATA_DF))
1194 return AC_ERR_DEV;
1195 return 0;
1196}
1197
1198static inline unsigned int __ac_err_mask(u8 status)
1199{
1200 unsigned int mask = ac_err_mask(status);
1201 if (mask == 0)
1202 return AC_ERR_OTHER;
1203 return mask;
1204}
1205
Jeff Garzik6037d6b2005-11-04 22:08:00 -05001206static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1207{
1208 ap->pad_dma = 0;
Tejun Heof0d36ef2007-01-20 16:00:28 +09001209 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1210 &ap->pad_dma, GFP_KERNEL);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05001211 return (ap->pad == NULL) ? -ENOMEM : 0;
1212}
1213
1214static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1215{
Tejun Heof0d36ef2007-01-20 16:00:28 +09001216 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
Jeff Garzik6037d6b2005-11-04 22:08:00 -05001217}
1218
Jeff Garzik35bb94b2006-04-11 13:12:34 -04001219static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1220{
1221 return (struct ata_port *) &host->hostdata[0];
1222}
1223
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224#endif /* __LINUX_LIBATA_H__ */