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libata: use ata_port_printk() in ata_wait_idle()
[deliverable/linux.git] / include / linux / libata.h
CommitLineData
1da177e4 1/*
af36d7f0
JG		 2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
1da177e4
LT		 24 */
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>
1c72d8d9 32#include <linux/dma-mapping.h>
41542dbe 33#include <asm/scatterlist.h>
f0d36efd 34#include <linux/io.h>
1da177e4
LT		 35#include <linux/ata.h>
36#include <linux/workqueue.h>
35bb94b1 37#include <scsi/scsi_host.h>
11ef697b 38#include <linux/acpi.h>
1da177e4 39
a6d967a4
JG		 40/*
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
2ec7df04 45#include <asm/libata-portmap.h>
a6d967a4
JG		 46#else
47#include <asm-generic/libata-portmap.h>
48#endif
2ec7df04 49
1da177e4 50/*
bfd60579
RD		 51 * compile-time options: to be removed as soon as all the drivers are
52 * converted to the new debugging mechanism
1da177e4
LT		 53 */
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 */
1da177e4
LT		 58
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
2c13b7ce
JG		 73#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
74
bfd60579
RD		 75/* 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
1da177e4
LT		 107/* 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,
d26fc955 119 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
1da177e4
LT		 120 ATA_MAX_PORTS = 8,
121 ATA_DEF_QUEUE = 1,
2ab7db1f 122 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
a6e6ce8e 123 ATA_MAX_QUEUE = 32,
2ab7db1f 124 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
1da177e4
LT		 125 ATA_MAX_BUS = 2,
126 ATA_DEF_BUSY_WAIT = 10000,
127 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
128
129 ATA_SHT_EMULATED = 1,
130 ATA_SHT_CMD_PER_LUN = 1,
131 ATA_SHT_THIS_ID = -1,
cf482935 132 ATA_SHT_USE_CLUSTERING = 1,
1da177e4
LT		 133
134 /* struct ata_device stuff */
949b38af
TH		 135 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
136 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
029f5468 137 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
88e49034 138 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
6fc49adb 139 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
6746544c
TH		 140 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
141 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
9f45cbd3 142 ATA_DFLAG_AN = (1 << 7), /* device supports AN */
ea1dd4e1 143 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
949b38af 144
e5c9e081 145 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
3343571d 146 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
13b8d09f 147 ATA_DFLAG_SPUNDOWN = (1 << 10), /* XXX: for spindown_compat */
72fa4b74 148 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
1da177e4 149
abdda733
TH		 150 ATA_DFLAG_DETACH = (1 << 16),
151 ATA_DFLAG_DETACHED = (1 << 17),
152
1da177e4
LT		 153 ATA_DEV_UNKNOWN = 0, /* unknown device */
154 ATA_DEV_ATA = 1, /* ATA device */
155 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
156 ATA_DEV_ATAPI = 3, /* ATAPI device */
157 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
158 ATA_DEV_NONE = 5, /* no device */
159
0c88758b
TH		 160 /* struct ata_link flags */
161 ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */
162 ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H
163 * Register FIS clearing BSY */
164
1da177e4 165 /* struct ata_port flags */
949b38af 166 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
1da177e4 167 /* (doesn't imply presence) */
949b38af
TH		 168 ATA_FLAG_SATA = (1 << 1),
169 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
170 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
171 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
172 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
173 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
174 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
175 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
7395acb2
TH		 176 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
177 * doesn't handle PIO interrupts */
178 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
7395acb2 179 ATA_FLAG_DEBUGMSG = (1 << 13),
b2a8bbe6 180 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
f834e49f 181 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
3cadbcc0 182 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
9f45cbd3 183 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
949b38af 184
b51e9e5d
TH		 185 /* The following flag belongs to ap->pflags but is kept in
186 * ap->flags because it's referenced in many LLDs and will be
187 * removed in not-too-distant future.
188 */
189 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
190
191 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
9ec957f2 192
b51e9e5d
TH		 193 /* struct ata_port pflags */
194 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
195 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
196 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
197 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
198 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
199 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
200 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
f4d6d004 201 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
949b38af 202
b51e9e5d 203 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
500530f6 204 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
64578a3d 205 ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */
949b38af
TH		 206
207 /* struct ata_queued_cmd flags */
208 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
209 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
210 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
1da177e4 211 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
27197367 212 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672
TH		 213 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
214
9ec957f2
TH		 215 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
216 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
217 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 218
4e5ec5db 219 /* host set flags */
cca3974e 220 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
ecef7253 221 ATA_HOST_STARTED = (1 << 1), /* Host started */
9bec2e38 222
b8b275ef
TH		 223 /* bits 24:31 of host->flags are reserved for LLD specific flags */
224
1da177e4 225 /* various lengths of time */
8d238e01
AC		 226 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
227 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
a2a7a662
TH		 228 ATA_TMOUT_INTERNAL = 30 * HZ,
229 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
1da177e4
LT		 230
231 /* ATA bus states */
232 BUS_UNKNOWN = 0,
233 BUS_DMA = 1,
234 BUS_IDLE = 2,
235 BUS_NOINTR = 3,
236 BUS_NODATA = 4,
237 BUS_TIMER = 5,
238 BUS_PIO = 6,
239 BUS_EDD = 7,
240 BUS_IDENTIFY = 8,
241 BUS_PACKET = 9,
242
243 /* SATA port states */
244 PORT_UNKNOWN = 0,
245 PORT_ENABLED = 1,
246 PORT_DISABLED = 2,
247
248 /* encoding various smaller bitmaps into a single
1da7b0d0 249 * unsigned int bitmap
1da177e4 250 */
b352e57d
AC		 251 ATA_BITS_PIO = 7,
252 ATA_BITS_MWDMA = 5,
1da7b0d0
TH		 253 ATA_BITS_UDMA = 8,
254
255 ATA_SHIFT_PIO = 0,
256 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
257 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
258
259 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
260 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
261 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
cedc9a47
JG		 262
263 /* size of buffer to pad xfers ending on unaligned boundaries */
264 ATA_DMA_PAD_SZ = 4,
265 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
949b38af 266
0c247c55
TH		 267 /* ering size */
268 ATA_ERING_SIZE = 32,
269
f3e81b19
TH		 270 /* desc_len for ata_eh_info and context */
271 ATA_EH_DESC_LEN = 80,
272
9be1e979
TH		 273 /* reset / recovery action types */
274 ATA_EH_REVALIDATE = (1 << 0),
275 ATA_EH_SOFTRESET = (1 << 1),
276 ATA_EH_HARDRESET = (1 << 2),
277
278 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
9666f400 279 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
9be1e979 280
f3e81b19 281 /* ata_eh_info->flags */
abdda733 282 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
13abf50d 283 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
1cdaf534
TH		 284 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
285 ATA_EHI_QUIET = (1 << 3), /* be quiet */
abdda733 286
0d64a233
TH		 287 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
288 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
289 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
290 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
291 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
f3e81b19 292
0d64a233 293 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
13abf50d
TH		 294 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
295
ad9e2762
TH		 296 /* max repeat if error condition is still set after ->error_handler */
297 ATA_EH_MAX_REPEAT = 5,
298
14d2bac1
TH		 299 /* how hard are we gonna try to probe/recover devices */
300 ATA_PROBE_MAX_TRIES = 3,
022bdb07 301 ATA_EH_DEV_TRIES = 3,
f5914a46 302
93590859
AC		 303 /* Horkage types. May be set by libata or controller on drives
304 (some horkage may be drive/controller pair dependant */
305
306 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
6919a0a6
AC		 307 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
308 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
18d6e9d5 309 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
16c55b03 310 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
1da177e4
LT		 311};
312
14be71f4 313enum hsm_task_states {
c56b14d2 314 HSM_ST_IDLE, /* no command on going */
71527647
AL		 315 HSM_ST_FIRST, /* (waiting the device to)
316 write CDB or first data block */
c56b14d2
AL		 317 HSM_ST, /* (waiting the device to) transfer data */
318 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2 319 HSM_ST_ERR, /* error */
1da177e4
LT		 320};
321
a7dac447 322enum ata_completion_errors {
11a56d24
TH		 323 AC_ERR_DEV = (1 << 0), /* device reported error */
324 AC_ERR_HSM = (1 << 1), /* host state machine violation */
325 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
326 AC_ERR_MEDIA = (1 << 3), /* media error */
327 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
328 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
329 AC_ERR_SYSTEM = (1 << 6), /* system error */
330 AC_ERR_INVALID = (1 << 7), /* invalid argument */
331 AC_ERR_OTHER = (1 << 8), /* unknown */
55a8e2c8 332 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
5335b729 333 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
a7dac447
JG		 334};
335
1da177e4
LT		 336/* forward declarations */
337struct scsi_device;
338struct ata_port_operations;
339struct ata_port;
cc0680a5 340struct ata_link;
1da177e4
LT		 341struct ata_queued_cmd;
342
343/* typedefs */
77853bf2 344typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
cc0680a5
TH		 345typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
346typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
d4b2bab4 347 unsigned long deadline);
cc0680a5 348typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
1da177e4
LT		 349
350struct ata_ioports {
0d5ff566
TH		 351 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;
1da177e4
LT		 366};
367
cca3974e 368struct ata_host {
1da177e4
LT		 369 spinlock_t lock;
370 struct device *dev;
371 unsigned long irq;
2ec7df04 372 unsigned long irq2;
0d5ff566 373 void __iomem * const *iomap;
1da177e4
LT		 374 unsigned int n_ports;
375 void *private_data;
057ace5e 376 const struct ata_port_operations *ops;
5444a6f4 377 unsigned long flags;
fafbae87
TH		 378#ifdef CONFIG_ATA_ACPI
379 acpi_handle acpi_handle;
380#endif
032af1ce 381 struct ata_port *simplex_claimed; /* channel owning the DMA */
f0eb62b8 382 struct ata_port *ports[0];
1da177e4
LT		 383};
384
385struct ata_queued_cmd {
386 struct ata_port *ap;
387 struct ata_device *dev;
388
389 struct scsi_cmnd *scsicmd;
390 void (*scsidone)(struct scsi_cmnd *);
391
392 struct ata_taskfile tf;
393 u8 cdb[ATAPI_CDB_LEN];
394
395 unsigned long flags; /* ATA_QCFLAG_xxx */
396 unsigned int tag;
397 unsigned int n_elem;
cedc9a47 398 unsigned int orig_n_elem;
1da177e4
LT		 399
400 int dma_dir;
401
cedc9a47 402 unsigned int pad_len;
5a5dbd18 403 unsigned int sect_size;
cedc9a47 404
1da177e4
LT		 405 unsigned int nbytes;
406 unsigned int curbytes;
407
408 unsigned int cursg;
409 unsigned int cursg_ofs;
410
411 struct scatterlist sgent;
cedc9a47 412 struct scatterlist pad_sgent;
1da177e4
LT		 413 void *buf_virt;
414
cedc9a47
JG		 415 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
416 struct scatterlist *__sg;
1da177e4 417
a22e2eb0 418 unsigned int err_mask;
e61e0672 419 struct ata_taskfile result_tf;
1da177e4
LT		 420 ata_qc_cb_t complete_fn;
421
1da177e4 422 void *private_data;
1c50dc83 423 void *lldd_task;
1da177e4
LT		 424};
425
cca3974e 426struct ata_port_stats {
1da177e4
LT		 427 unsigned long unhandled_irq;
428 unsigned long idle_irq;
429 unsigned long rw_reqbuf;
430};
431
0c247c55
TH		 432struct ata_ering_entry {
433 int is_io;
434 unsigned int err_mask;
435 u64 timestamp;
436};
437
438struct ata_ering {
439 int cursor;
440 struct ata_ering_entry ring[ATA_ERING_SIZE];
441};
442
1da177e4 443struct ata_device {
9af5c9c9 444 struct ata_link *link;
72fa4b74 445 unsigned int devno; /* 0 or 1 */
1da177e4 446 unsigned long flags; /* ATA_DFLAG_xxx */
75683fe7 447 unsigned int horkage; /* List of broken features */
3edebac4 448 struct scsi_device *sdev; /* attached SCSI device */
fafbae87
TH		 449#ifdef CONFIG_ATA_ACPI
450 acpi_handle acpi_handle;
451#endif
72fa4b74
TH		 452 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
453 u64 n_sectors; /* size of device, if ATA */
1da177e4 454 unsigned int class; /* ATA_DEV_xxx */
fe635c7e 455 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
1da177e4
LT		 456 u8 pio_mode;
457 u8 dma_mode;
458 u8 xfer_mode;
459 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
460
8cbd6df1
AL		 461 unsigned int multi_count; /* sectors count for
462 READ/WRITE MULTIPLE */
b00eec1d 463 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 464 unsigned int cdb_len;
8bf62ece 465
acf356b1
TH		 466 /* per-dev xfer mask */
467 unsigned int pio_mask;
468 unsigned int mwdma_mask;
469 unsigned int udma_mask;
470
8bf62ece
AL		 471 /* for CHS addressing */
472 u16 cylinders; /* Number of cylinders */
473 u16 heads; /* Number of heads */
474 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 475
476 /* error history */
477 struct ata_ering ering;
7d47e8d4 478 int spdn_cnt;
1da177e4
LT		 479};
480
72fa4b74
TH		 481/* Offset into struct ata_device. Fields above it are maintained
482 * acress device init. Fields below are zeroed.
483 */
484#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
485
f3e81b19
TH		 486struct ata_eh_info {
487 struct ata_device *dev; /* offending device */
488 u32 serror; /* SError from LLDD */
489 unsigned int err_mask; /* port-wide err_mask */
490 unsigned int action; /* ATA_EH_* action mask */
47005f25 491 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 492 unsigned int flags; /* ATA_EHI_* flags */
abdda733 493
abdda733
TH		 494 unsigned int probe_mask;
495
f3e81b19
TH		 496 char desc[ATA_EH_DESC_LEN];
497 int desc_len;
498};
499
500struct ata_eh_context {
501 struct ata_eh_info i;
502 int tries[ATA_MAX_DEVICES];
abdda733
TH		 503 unsigned int classes[ATA_MAX_DEVICES];
504 unsigned int did_probe_mask;
f3e81b19
TH		 505};
506
64578a3d
TH		 507struct ata_acpi_drive
508{
509 u32 pio;
510 u32 dma;
511} __packed;
512
513struct ata_acpi_gtm {
514 struct ata_acpi_drive drive[2];
515 u32 flags;
516} __packed;
517
9af5c9c9
TH		 518struct ata_link {
519 struct ata_port *ap;
8989805d 520 int pmp; /* port multiplier port # */
9af5c9c9
TH		 521
522 unsigned int active_tag; /* active tag on this link */
523 u32 sactive; /* active NCQ commands */
524
0c88758b
TH		 525 unsigned int flags; /* ATA_LFLAG_xxx */
526
9af5c9c9
TH		 527 unsigned int hw_sata_spd_limit;
528 unsigned int sata_spd_limit;
529 unsigned int sata_spd; /* current SATA PHY speed */
530
531 /* record runtime error info, protected by host_set lock */
532 struct ata_eh_info eh_info;
533 /* EH context */
534 struct ata_eh_context eh_context;
535
536 struct ata_device device[ATA_MAX_DEVICES];
537};
538
1da177e4 539struct ata_port {
cca3974e 540 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
057ace5e 541 const struct ata_port_operations *ops;
ba6a1308 542 spinlock_t *lock;
1da177e4 543 unsigned long flags; /* ATA_FLAG_xxx */
b51e9e5d 544 unsigned int pflags; /* ATA_PFLAG_xxx */
44877b4e
TH		 545 unsigned int print_id; /* user visible unique port ID */
546 unsigned int port_no; /* 0 based port no. inside the host */
1da177e4
LT		 547
548 struct ata_prd *prd; /* our SG list */
549 dma_addr_t prd_dma; /* and its DMA mapping */
550
cedc9a47
JG		 551 void *pad; /* array of DMA pad buffers */
552 dma_addr_t pad_dma;
553
1da177e4
LT		 554 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
555
556 u8 ctl; /* cache of ATA control register */
557 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 558 unsigned int pio_mask;
559 unsigned int mwdma_mask;
560 unsigned int udma_mask;
561 unsigned int cbl; /* cable type; ATA_CBL_xxx */
1da177e4
LT		 562
563 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 564 unsigned long qc_allocated;
dedaf2b0
TH		 565 unsigned int qc_active;
566
9af5c9c9 567 struct ata_link link; /* host default link */
1da177e4 568
8989805d
TH		 569 int nr_pmp_links; /* nr of available PMP links */
570 struct ata_link *pmp_link; /* array of PMP links */
571
cca3974e
JG		 572 struct ata_port_stats stats;
573 struct ata_host *host;
2f1f610b 574 struct device *dev;
1da177e4 575
65f27f38 576 void *port_task_data;
52bad64d
DH		 577 struct delayed_work port_task;
578 struct delayed_work hotplug_task;
3b01b8af 579 struct work_struct scsi_rescan_task;
86e45b6b 580
14be71f4 581 unsigned int hsm_task_state;
1da177e4 582
bfd60579 583 u32 msg_enable;
a72ec4ce 584 struct list_head eh_done_q;
c6cf9e99 585 wait_queue_head_t eh_wait_q;
bfd60579 586
500530f6
TH		 587 pm_message_t pm_mesg;
588 int *pm_result;
589
5ddf24c5
TH		 590 struct timer_list fastdrain_timer;
591 unsigned long fastdrain_cnt;
592
1da177e4 593 void *private_data;
fe635c7e 594
fafbae87
TH		 595#ifdef CONFIG_ATA_ACPI
596 acpi_handle acpi_handle;
64578a3d 597 struct ata_acpi_gtm acpi_gtm;
fafbae87 598#endif
fe635c7e 599 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 600};
601
602struct ata_port_operations {
603 void (*port_disable) (struct ata_port *);
604
cd0d3bbc 605 void (*dev_config) (struct ata_device *);
1da177e4
LT		 606
607 void (*set_piomode) (struct ata_port *, struct ata_device *);
608 void (*set_dmamode) (struct ata_port *, struct ata_device *);
a76b62ca 609 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
1da177e4 610
057ace5e 611 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 612 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
613
057ace5e 614 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 615 u8 (*check_status)(struct ata_port *ap);
616 u8 (*check_altstatus)(struct ata_port *ap);
1da177e4
LT		 617 void (*dev_select)(struct ata_port *ap, unsigned int device);
618
c19ba8af 619 void (*phy_reset) (struct ata_port *ap); /* obsolete */
0260731f 620 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
c19ba8af 621
be0d18df
AC		 622 int (*cable_detect) (struct ata_port *ap);
623
b229a7b0 624 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
1da177e4
LT		 625
626 void (*bmdma_setup) (struct ata_queued_cmd *qc);
627 void (*bmdma_start) (struct ata_queued_cmd *qc);
628
a6b2c5d4
AC		 629 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
630
1da177e4 631 void (*qc_prep) (struct ata_queued_cmd *qc);
9a3d9eb0 632 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
1da177e4 633
9ec957f2
TH		 634 /* Error handlers. ->error_handler overrides ->eng_timeout and
635 * indicates that new-style EH is in place.
636 */
637 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
638
639 void (*freeze) (struct ata_port *ap);
640 void (*thaw) (struct ata_port *ap);
641 void (*error_handler) (struct ata_port *ap);
642 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
1da177e4 643
7d12e780 644 irq_handler_t irq_handler;
1da177e4 645 void (*irq_clear) (struct ata_port *);
83625006
AI		 646 u8 (*irq_on) (struct ata_port *);
647 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
1da177e4 648
da3dbb17
TH		 649 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
650 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
1da177e4 651
500530f6
TH		 652 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
653 int (*port_resume) (struct ata_port *ap);
654
1da177e4
LT		 655 int (*port_start) (struct ata_port *ap);
656 void (*port_stop) (struct ata_port *ap);
657
cca3974e 658 void (*host_stop) (struct ata_host *host);
1da177e4 659
b73fc89f 660 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 661 u8 (*bmdma_status) (struct ata_port *ap);
662};
663
664struct ata_port_info {
d0be4a7d 665 struct scsi_host_template *sht;
cca3974e 666 unsigned long flags;
0c88758b 667 unsigned long link_flags;
1da177e4
LT		 668 unsigned long pio_mask;
669 unsigned long mwdma_mask;
670 unsigned long udma_mask;
057ace5e 671 const struct ata_port_operations *port_ops;
21b0ad4f 672 irq_handler_t irq_handler;
e99f8b5e 673 void *private_data;
1da177e4
LT		 674};
675
452503f9
AC		 676struct ata_timing {
677 unsigned short mode; /* ATA mode */
678 unsigned short setup; /* t1 */
679 unsigned short act8b; /* t2 for 8-bit I/O */
680 unsigned short rec8b; /* t2i for 8-bit I/O */
681 unsigned short cyc8b; /* t0 for 8-bit I/O */
682 unsigned short active; /* t2 or tD */
683 unsigned short recover; /* t2i or tK */
684 unsigned short cycle; /* t0 */
685 unsigned short udma; /* t2CYCTYP/2 */
686};
687
688#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
1da177e4 689
e9c83914
TH		 690extern const unsigned long sata_deb_timing_normal[];
691extern const unsigned long sata_deb_timing_hotplug[];
692extern const unsigned long sata_deb_timing_long[];
693
dd5b06c4 694extern const struct ata_port_operations ata_dummy_port_ops;
21b0ad4f 695extern const struct ata_port_info ata_dummy_port_info;
dd5b06c4 696
e9c83914
TH		 697static inline const unsigned long *
698sata_ehc_deb_timing(struct ata_eh_context *ehc)
699{
700 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
701 return sata_deb_timing_hotplug;
702 else
703 return sata_deb_timing_normal;
704}
d7bb4cc7 705
dd5b06c4
TH		 706static inline int ata_port_is_dummy(struct ata_port *ap)
707{
708 return ap->ops == &ata_dummy_port_ops;
709}
710
936fd732 711extern void sata_print_link_status(struct ata_link *link);
1da177e4
LT		 712extern void ata_port_probe(struct ata_port *);
713extern void __sata_phy_reset(struct ata_port *ap);
714extern void sata_phy_reset(struct ata_port *ap);
715extern void ata_bus_reset(struct ata_port *ap);
936fd732
TH		 716extern int sata_set_spd(struct ata_link *link);
717extern int sata_link_debounce(struct ata_link *link,
718 const unsigned long *params, unsigned long deadline);
719extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
720 unsigned long deadline);
cc0680a5
TH		 721extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
722extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
d4b2bab4 723 unsigned long deadline);
cc0680a5
TH		 724extern int sata_link_hardreset(struct ata_link *link,
725 const unsigned long *timing, unsigned long deadline);
726extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
d4b2bab4 727 unsigned long deadline);
cc0680a5 728extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1da177e4
LT		 729extern void ata_port_disable(struct ata_port *);
730extern void ata_std_ports(struct ata_ioports *ioaddr);
731#ifdef CONFIG_PCI
1626aeb8
TH		 732extern int ata_pci_init_one (struct pci_dev *pdev,
733 const struct ata_port_info * const * ppi);
1da177e4 734extern void ata_pci_remove_one (struct pci_dev *pdev);
6ffa01d8 735#ifdef CONFIG_PM
3c5100c1 736extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
553c4aa6 737extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
3c5100c1 738extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
9b847548 739extern int ata_pci_device_resume(struct pci_dev *pdev);
6ffa01d8 740#endif
17bb34a3 741extern int ata_pci_clear_simplex(struct pci_dev *pdev);
1da177e4 742#endif /* CONFIG_PCI */
f3187195 743extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
f5cda257
TH		 744extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
745 const struct ata_port_info * const * ppi, int n_ports);
ecef7253 746extern int ata_host_start(struct ata_host *host);
f3187195
TH		 747extern int ata_host_register(struct ata_host *host,
748 struct scsi_host_template *sht);
f5cda257
TH		 749extern int ata_host_activate(struct ata_host *host, int irq,
750 irq_handler_t irq_handler, unsigned long irq_flags,
751 struct scsi_host_template *sht);
0529c159 752extern void ata_host_detach(struct ata_host *host);
cca3974e
JG		 753extern void ata_host_init(struct ata_host *, struct device *,
754 unsigned long, const struct ata_port_operations *);
193515d5 755extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 756extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
757extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
2f294968 758extern void ata_scsi_media_change_notify(struct ata_device *atadev);
80289167 759extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 760extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 761 struct ata_port_info *, struct Scsi_Host *);
762extern int ata_sas_port_init(struct ata_port *);
763extern int ata_sas_port_start(struct ata_port *ap);
764extern void ata_sas_port_stop(struct ata_port *ap);
765extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
766extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
767 struct ata_port *ap);
1da177e4 768extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
936fd732
TH		 769extern int sata_scr_valid(struct ata_link *link);
770extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
771extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
772extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
773extern int ata_link_online(struct ata_link *link);
774extern int ata_link_offline(struct ata_link *link);
6ffa01d8 775#ifdef CONFIG_PM
cca3974e
JG		 776extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
777extern void ata_host_resume(struct ata_host *host);
6ffa01d8 778#endif
67846b30 779extern int ata_ratelimit(void);
d1adc1bb
TH		 780extern int ata_busy_sleep(struct ata_port *ap,
781 unsigned long timeout_pat, unsigned long timeout);
d4b2bab4 782extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
65f27f38 783extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
86e45b6b 784 void *data, unsigned long delay);
c22daff4
TH		 785extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
786 unsigned long interval_msec,
787 unsigned long timeout_msec);
a619f981 788extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
67846b30 789
1da177e4
LT		 790/*
791 * Default driver ops implementations
792 */
057ace5e 793extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 794extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
9977126c
TH		 795extern void ata_tf_to_fis(const struct ata_taskfile *tf,
796 u8 pmp, int is_cmd, u8 *fis);
057ace5e 797extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1da177e4
LT		 798extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
799extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
800extern u8 ata_check_status(struct ata_port *ap);
801extern u8 ata_altstatus(struct ata_port *ap);
057ace5e 802extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 803extern int ata_port_start (struct ata_port *ap);
d92e74d3 804extern int ata_sff_port_start (struct ata_port *ap);
7d12e780 805extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
0d5ff566
TH		 806extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
807 unsigned int buflen, int write_data);
808extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
809 unsigned int buflen, int write_data);
d26fc955 810extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
1da177e4 811extern void ata_qc_prep(struct ata_queued_cmd *qc);
e46834cd 812extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
9a3d9eb0 813extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
1da177e4
LT		 814extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
815 unsigned int buflen);
816extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
817 unsigned int n_elem);
057ace5e 818extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
10305f0f 819extern void ata_dev_disable(struct ata_device *adev);
6a62a04d
TH		 820extern void ata_id_string(const u16 *id, unsigned char *s,
821 unsigned int ofs, unsigned int len);
822extern void ata_id_c_string(const u16 *id, unsigned char *s,
823 unsigned int ofs, unsigned int len);
10305f0f 824extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
1da177e4
LT		 825extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
826extern void ata_bmdma_start (struct ata_queued_cmd *qc);
b73fc89f 827extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 828extern u8 ata_bmdma_status(struct ata_port *ap);
829extern void ata_bmdma_irq_clear(struct ata_port *ap);
6d97dbd7
TH		 830extern void ata_bmdma_freeze(struct ata_port *ap);
831extern void ata_bmdma_thaw(struct ata_port *ap);
f5914a46 832extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
6d97dbd7
TH		 833 ata_reset_fn_t softreset,
834 ata_reset_fn_t hardreset,
835 ata_postreset_fn_t postreset);
836extern void ata_bmdma_error_handler(struct ata_port *ap);
837extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
9a1004d0
TH		 838extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
839 u8 status, int in_wq);
f686bcb8 840extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 841extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
842 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 843extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 844 void (*done)(struct scsi_cmnd *));
845extern int ata_std_bios_param(struct scsi_device *sdev,
846 struct block_device *bdev,
847 sector_t capacity, int geom[]);
848extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 849extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 850extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
851 int queue_depth);
3373efd8 852extern struct ata_device *ata_dev_pair(struct ata_device *adev);
0260731f 853extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
83625006
AI		 854extern u8 ata_irq_on(struct ata_port *ap);
855extern u8 ata_dummy_irq_on(struct ata_port *ap);
856extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
857extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
1da177e4 858
be0d18df
AC		 859extern int ata_cable_40wire(struct ata_port *ap);
860extern int ata_cable_80wire(struct ata_port *ap);
861extern int ata_cable_sata(struct ata_port *ap);
862extern int ata_cable_unknown(struct ata_port *ap);
863
452503f9
AC		 864/*
865 * Timing helpers
866 */
1bc4ccff
AC		 867
868extern unsigned int ata_pio_need_iordy(const struct ata_device *);
452503f9
AC		 869extern int ata_timing_compute(struct ata_device *, unsigned short,
870 struct ata_timing *, int, int);
871extern void ata_timing_merge(const struct ata_timing *,
872 const struct ata_timing *, struct ata_timing *,
873 unsigned int);
874
875enum {
876 ATA_TIMING_SETUP = (1 << 0),
877 ATA_TIMING_ACT8B = (1 << 1),
878 ATA_TIMING_REC8B = (1 << 2),
879 ATA_TIMING_CYC8B = (1 << 3),
880 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
881 ATA_TIMING_CYC8B,
882 ATA_TIMING_ACTIVE = (1 << 4),
883 ATA_TIMING_RECOVER = (1 << 5),
884 ATA_TIMING_CYCLE = (1 << 6),
885 ATA_TIMING_UDMA = (1 << 7),
886 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
887 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
888 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
889 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
890};
891
1da177e4
LT		 892
893#ifdef CONFIG_PCI
894struct pci_bits {
895 unsigned int reg; /* PCI config register to read */
896 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
897 unsigned long mask;
898 unsigned long val;
899};
900
d583bc18 901extern int ata_pci_init_sff_host(struct ata_host *host);
1626aeb8 902extern int ata_pci_init_bmdma(struct ata_host *host);
d583bc18
TH		 903extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
904 const struct ata_port_info * const * ppi,
905 struct ata_host **r_host);
057ace5e 906extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
a76b62ca 907extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
1da177e4
LT		 908#endif /* CONFIG_PCI */
909
ece1d636
TH		 910/*
911 * EH
912 */
ece1d636 913extern void ata_eng_timeout(struct ata_port *ap);
7b70fc03
TH		 914
915extern void ata_port_schedule_eh(struct ata_port *ap);
dbd82616 916extern int ata_link_abort(struct ata_link *link);
7b70fc03 917extern int ata_port_abort(struct ata_port *ap);
e3180499
TH		 918extern int ata_port_freeze(struct ata_port *ap);
919
920extern void ata_eh_freeze_port(struct ata_port *ap);
921extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 922
ece1d636
TH		 923extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
924extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
925
f5914a46
TH		 926extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
927 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
928 ata_postreset_fn_t postreset);
022bdb07 929
61440db6
TH		 930/*
931 * printk helpers
932 */
933#define ata_port_printk(ap, lv, fmt, args...) \
44877b4e 934 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
61440db6 935
8989805d
TH		 936#define ata_link_printk(link, lv, fmt, args...) do { \
937 if ((link)->ap->nr_pmp_links) \
938 printk(lv"ata%u.%02u: "fmt, (link)->ap->print_id, \
939 (link)->pmp , ##args); \
940 else \
941 printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args); \
942 } while(0)
9af5c9c9 943
61440db6 944#define ata_dev_printk(dev, lv, fmt, args...) \
8989805d
TH		 945 printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, \
946 (dev)->link->pmp + (dev)->devno , ##args)
1da177e4 947
f3e81b19
TH		 948/*
949 * ata_eh_info helpers
950 */
b64bbc39
TH		 951extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
952extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
953extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
f3e81b19 954
f8f1e1cc 955static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi)
084fe639 956{
f8f1e1cc 957 ehi->flags |= ATA_EHI_RESUME_LINK;
084fe639
TH		 958 ehi->action |= ATA_EH_SOFTRESET;
959 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
960}
961
c0b6c037
TH		 962static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
963{
f8f1e1cc
TH		 964 ata_ehi_schedule_probe(ehi);
965 ehi->flags |= ATA_EHI_HOTPLUGGED;
c0b6c037
TH		 966 ehi->err_mask |= AC_ERR_ATA_BUS;
967}
968
61440db6
TH		 969/*
970 * qc helpers
971 */
972c26bd
JG		 972static inline int
973ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
974{
975 if (sg == &qc->pad_sgent)
976 return 1;
977 if (qc->pad_len)
978 return 0;
979 if (((sg - qc->__sg) + 1) == qc->n_elem)
980 return 1;
981 return 0;
982}
983
cc1887f3
TH		 984static inline struct scatterlist *
985ata_qc_first_sg(struct ata_queued_cmd *qc)
986{
987 if (qc->n_elem)
988 return qc->__sg;
989 if (qc->pad_len)
990 return &qc->pad_sgent;
991 return NULL;
992}
993
cedc9a47
JG		 994static inline struct scatterlist *
995ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
996{
997 if (sg == &qc->pad_sgent)
998 return NULL;
999 if (++sg - qc->__sg < qc->n_elem)
1000 return sg;
cc1887f3
TH		 1001 if (qc->pad_len)
1002 return &qc->pad_sgent;
1003 return NULL;
cedc9a47
JG		 1004}
1005
1006#define ata_for_each_sg(sg, qc) \
cc1887f3 1007 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
cedc9a47 1008
1da177e4
LT		 1009static inline unsigned int ata_tag_valid(unsigned int tag)
1010{
1011 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1012}
1013
2ab7db1f
TH		 1014static inline unsigned int ata_tag_internal(unsigned int tag)
1015{
1016 return tag == ATA_MAX_QUEUE - 1;
1017}
1018
5806db22
TH		 1019/*
1020 * device helpers
1021 */
e1211e3f 1022static inline unsigned int ata_class_enabled(unsigned int class)
597afd21
TH		 1023{
1024 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
1025}
1026
e1211e3f 1027static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 1028{
e1211e3f
TH		 1029 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
1030}
1031
002c8054
TH		 1032static inline unsigned int ata_class_absent(unsigned int class)
1033{
1034 return !ata_class_enabled(class) && !ata_class_disabled(class);
1035}
1036
e1211e3f
TH		 1037static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1038{
1039 return ata_class_enabled(dev->class);
1040}
1041
1042static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1043{
1044 return ata_class_disabled(dev->class);
1da177e4
LT		 1045}
1046
002c8054
TH		 1047static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1048{
1049 return ata_class_absent(dev->class);
1050}
1051
5806db22 1052/*
f58229f8 1053 * link helpers
5806db22 1054 */
8989805d
TH		 1055static inline int ata_is_host_link(const struct ata_link *link)
1056{
1057 return link == &link->ap->link;
1058}
1059
f58229f8 1060static inline int ata_link_max_devices(const struct ata_link *link)
5806db22 1061{
8989805d 1062 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
5806db22
TH		 1063 return 2;
1064 return 1;
1065}
1066
8989805d
TH		 1067static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1068{
1069 if (ap->nr_pmp_links)
1070 return ap->pmp_link;
1071 return &ap->link;
1072}
1073
1074static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1075{
1076 struct ata_port *ap = link->ap;
1077
1078 if (link == &ap->link) {
1079 if (!ap->nr_pmp_links)
1080 return NULL;
1081 return ap->pmp_link;
1082 }
1083
1084 if (++link - ap->pmp_link < ap->nr_pmp_links)
1085 return link;
1086 return NULL;
1087}
1088
1089#define __ata_port_for_each_link(lk, ap) \
1090 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1091
1092#define ata_port_for_each_link(link, ap) \
1093 for ((link) = ata_port_first_link(ap); (link); \
1094 (link) = ata_port_next_link(link))
f58229f8
TH		 1095
1096#define ata_link_for_each_dev(dev, link) \
1097 for ((dev) = (link)->device; \
1098 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1099 (dev)++)
1100
1101#define ata_link_for_each_dev_reverse(dev, link) \
1102 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1103 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
5806db22 1104
1da177e4
LT		 1105static inline u8 ata_chk_status(struct ata_port *ap)
1106{
1107 return ap->ops->check_status(ap);
1108}
1109
6d1245bf
TH		 1110/**
1111 * ata_ncq_enabled - Test whether NCQ is enabled
1112 * @dev: ATA device to test for
1113 *
1114 * LOCKING:
1115 * spin_lock_irqsave(host lock)
1116 *
1117 * RETURNS:
1118 * 1 if NCQ is enabled for @dev, 0 otherwise.
1119 */
1120static inline int ata_ncq_enabled(struct ata_device *dev)
1121{
1122 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1123 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1124}
0baab86b
EF		 1125
1126/**
1127 * ata_pause - Flush writes and pause 400 nanoseconds.
1128 * @ap: Port to wait for.
1129 *
1130 * LOCKING:
1131 * Inherited from caller.
1132 */
1133
1da177e4
LT		 1134static inline void ata_pause(struct ata_port *ap)
1135{
1136 ata_altstatus(ap);
1137 ndelay(400);
1138}
1139
0baab86b
EF		 1140
1141/**
1142 * ata_busy_wait - Wait for a port status register
1143 * @ap: Port to wait for.
0777721c
A		 1144 * @bits: bits that must be clear
1145 * @max: number of 10uS waits to perform
0baab86b
EF		 1146 *
1147 * Waits up to max*10 microseconds for the selected bits in the port's
1148 * status register to be cleared.
1149 * Returns final value of status register.
1150 *
1151 * LOCKING:
1152 * Inherited from caller.
1153 */
1154
1da177e4
LT		 1155static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1156 unsigned int max)
1157{
1158 u8 status;
1159
1160 do {
1161 udelay(10);
1162 status = ata_chk_status(ap);
1163 max--;
d1adc1bb 1164 } while (status != 0xff && (status & bits) && (max > 0));
1da177e4
LT		 1165
1166 return status;
1167}
1168
0baab86b
EF		 1169
1170/**
1171 * ata_wait_idle - Wait for a port to be idle.
1172 * @ap: Port to wait for.
1173 *
1174 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1175 * Returns final value of status register.
1176 *
1177 * LOCKING:
1178 * Inherited from caller.
1179 */
1180
1da177e4
LT		 1181static inline u8 ata_wait_idle(struct ata_port *ap)
1182{
1183 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1184
15529456 1185#ifdef ATA_DEBUG
55f3952d 1186 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
15529456
TH		 1187 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1188 status);
1189#endif
1da177e4
LT		 1190
1191 return status;
1192}
1193
1194static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1195{
1196 qc->tf.ctl |= ATA_NIEN;
1197}
1198
f69499f4
TH		 1199static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1200 unsigned int tag)
1da177e4
LT		 1201{
1202 if (likely(ata_tag_valid(tag)))
1203 return &ap->qcmd[tag];
1204 return NULL;
1205}
1206
f69499f4
TH		 1207static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1208 unsigned int tag)
1209{
1210 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1211
1212 if (unlikely(!qc) || !ap->ops->error_handler)
1213 return qc;
1214
1215 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1216 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1217 return qc;
1218
1219 return NULL;
1220}
1221
3373efd8 1222static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1223{
1224 memset(tf, 0, sizeof(*tf));
1225
9af5c9c9 1226 tf->ctl = dev->link->ap->ctl;
3373efd8 1227 if (dev->devno == 0)
1da177e4
LT		 1228 tf->device = ATA_DEVICE_OBS;
1229 else
1230 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1231}
1232
2c13b7ce
JG		 1233static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1234{
501e0c50 1235 qc->dma_dir = DMA_NONE;
2c13b7ce
JG		 1236 qc->__sg = NULL;
1237 qc->flags = 0;
726f0785 1238 qc->cursg = qc->cursg_ofs = 0;
2c13b7ce 1239 qc->nbytes = qc->curbytes = 0;
7a801184 1240 qc->n_elem = 0;
a22e2eb0 1241 qc->err_mask = 0;
d0f29485 1242 qc->pad_len = 0;
5a5dbd18 1243 qc->sect_size = ATA_SECT_SIZE;
2c13b7ce 1244
3373efd8 1245 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1246
1247 /* init result_tf such that it indicates normal completion */
1248 qc->result_tf.command = ATA_DRDY;
1249 qc->result_tf.feature = 0;
2c13b7ce
JG		 1250}
1251
057ace5e 1252static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1253{
1254 return ata_id_wcache_enabled(dev->id) ||
1255 ata_id_has_flush(dev->id) ||
1256 ata_id_has_flush_ext(dev->id);
1257}
1258
a7dac447
JG		 1259static inline unsigned int ac_err_mask(u8 status)
1260{
3655d1d3 1261 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1262 return AC_ERR_HSM;
a7dac447
JG		 1263 if (status & (ATA_ERR | ATA_DF))
1264 return AC_ERR_DEV;
1265 return 0;
1266}
1267
1268static inline unsigned int __ac_err_mask(u8 status)
1269{
1270 unsigned int mask = ac_err_mask(status);
1271 if (mask == 0)
1272 return AC_ERR_OTHER;
1273 return mask;
1274}
1275
6037d6bb
JG		 1276static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1277{
1278 ap->pad_dma = 0;
f0d36efd
TH		 1279 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1280 &ap->pad_dma, GFP_KERNEL);
6037d6bb
JG		 1281 return (ap->pad == NULL) ? -ENOMEM : 0;
1282}
1283
1284static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1285{
f0d36efd 1286 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
6037d6bb
JG		 1287}
1288
35bb94b1
JG		 1289static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1290{
4911487a 1291 return *(struct ata_port **)&host->hostdata[0];
35bb94b1
JG		 1292}
1293
1da177e4 1294#endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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