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[SCSI] sas_ata: sas_ata_qc_issue should return AC_ERR_*
[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 */
ea1dd4e1 142 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
949b38af 143
e5c9e081 144 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
3343571d 145 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
13b8d09f 146 ATA_DFLAG_SPUNDOWN = (1 << 10), /* XXX: for spindown_compat */
72fa4b74 147 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
1da177e4 148
abdda733
TH		 149 ATA_DFLAG_DETACH = (1 << 16),
150 ATA_DFLAG_DETACHED = (1 << 17),
151
1da177e4
LT		 152 ATA_DEV_UNKNOWN = 0, /* unknown device */
153 ATA_DEV_ATA = 1, /* ATA device */
154 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
155 ATA_DEV_ATAPI = 3, /* ATAPI device */
156 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
157 ATA_DEV_NONE = 5, /* no device */
158
159 /* struct ata_port flags */
949b38af 160 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
1da177e4 161 /* (doesn't imply presence) */
949b38af
TH		 162 ATA_FLAG_SATA = (1 << 1),
163 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
164 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
165 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
166 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
167 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
168 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
169 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
7395acb2
TH		 170 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
171 * doesn't handle PIO interrupts */
172 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
abdda733
TH		 173 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
174 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
175 * Register FIS clearing BSY */
7395acb2 176 ATA_FLAG_DEBUGMSG = (1 << 13),
b2a8bbe6 177 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
f834e49f 178 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
3cadbcc0 179 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
949b38af 180
b51e9e5d
TH		 181 /* The following flag belongs to ap->pflags but is kept in
182 * ap->flags because it's referenced in many LLDs and will be
183 * removed in not-too-distant future.
184 */
185 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
186
187 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
9ec957f2 188
b51e9e5d
TH		 189 /* struct ata_port pflags */
190 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
191 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
192 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
193 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
194 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
195 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
196 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
f4d6d004 197 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
949b38af 198
b51e9e5d 199 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
500530f6 200 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
64578a3d 201 ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */
949b38af
TH		 202
203 /* struct ata_queued_cmd flags */
204 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
205 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
206 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
1da177e4 207 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
27197367 208 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672
TH		 209 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
210
9ec957f2
TH		 211 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
212 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
213 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 214
4e5ec5db 215 /* host set flags */
cca3974e 216 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
ecef7253 217 ATA_HOST_STARTED = (1 << 1), /* Host started */
9bec2e38 218
1da177e4 219 /* various lengths of time */
8d238e01
AC		 220 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
221 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
a2a7a662
TH		 222 ATA_TMOUT_INTERNAL = 30 * HZ,
223 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
1da177e4
LT		 224
225 /* ATA bus states */
226 BUS_UNKNOWN = 0,
227 BUS_DMA = 1,
228 BUS_IDLE = 2,
229 BUS_NOINTR = 3,
230 BUS_NODATA = 4,
231 BUS_TIMER = 5,
232 BUS_PIO = 6,
233 BUS_EDD = 7,
234 BUS_IDENTIFY = 8,
235 BUS_PACKET = 9,
236
237 /* SATA port states */
238 PORT_UNKNOWN = 0,
239 PORT_ENABLED = 1,
240 PORT_DISABLED = 2,
241
242 /* encoding various smaller bitmaps into a single
1da7b0d0 243 * unsigned int bitmap
1da177e4 244 */
b352e57d
AC		 245 ATA_BITS_PIO = 7,
246 ATA_BITS_MWDMA = 5,
1da7b0d0
TH		 247 ATA_BITS_UDMA = 8,
248
249 ATA_SHIFT_PIO = 0,
250 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
251 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
252
253 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
254 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
255 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
cedc9a47
JG		 256
257 /* size of buffer to pad xfers ending on unaligned boundaries */
258 ATA_DMA_PAD_SZ = 4,
259 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
949b38af 260
0c247c55
TH		 261 /* ering size */
262 ATA_ERING_SIZE = 32,
263
f3e81b19
TH		 264 /* desc_len for ata_eh_info and context */
265 ATA_EH_DESC_LEN = 80,
266
9be1e979
TH		 267 /* reset / recovery action types */
268 ATA_EH_REVALIDATE = (1 << 0),
269 ATA_EH_SOFTRESET = (1 << 1),
270 ATA_EH_HARDRESET = (1 << 2),
271
272 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
9666f400 273 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
9be1e979 274
f3e81b19 275 /* ata_eh_info->flags */
abdda733 276 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
13abf50d 277 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
1cdaf534
TH		 278 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
279 ATA_EHI_QUIET = (1 << 3), /* be quiet */
abdda733 280
0d64a233
TH		 281 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
282 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
283 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
284 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
285 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
f3e81b19 286
0d64a233 287 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
13abf50d
TH		 288 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
289
ad9e2762
TH		 290 /* max repeat if error condition is still set after ->error_handler */
291 ATA_EH_MAX_REPEAT = 5,
292
14d2bac1
TH		 293 /* how hard are we gonna try to probe/recover devices */
294 ATA_PROBE_MAX_TRIES = 3,
022bdb07 295 ATA_EH_DEV_TRIES = 3,
f5914a46 296
93590859
AC		 297 /* Horkage types. May be set by libata or controller on drives
298 (some horkage may be drive/controller pair dependant */
299
300 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
6919a0a6
AC		 301 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
302 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
18d6e9d5 303 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
1da177e4
LT		 304};
305
14be71f4 306enum hsm_task_states {
c56b14d2 307 HSM_ST_IDLE, /* no command on going */
71527647
AL		 308 HSM_ST_FIRST, /* (waiting the device to)
309 write CDB or first data block */
c56b14d2
AL		 310 HSM_ST, /* (waiting the device to) transfer data */
311 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2 312 HSM_ST_ERR, /* error */
1da177e4
LT		 313};
314
a7dac447 315enum ata_completion_errors {
11a56d24
TH		 316 AC_ERR_DEV = (1 << 0), /* device reported error */
317 AC_ERR_HSM = (1 << 1), /* host state machine violation */
318 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
319 AC_ERR_MEDIA = (1 << 3), /* media error */
320 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
321 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
322 AC_ERR_SYSTEM = (1 << 6), /* system error */
323 AC_ERR_INVALID = (1 << 7), /* invalid argument */
324 AC_ERR_OTHER = (1 << 8), /* unknown */
55a8e2c8 325 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
a7dac447
JG		 326};
327
1da177e4
LT		 328/* forward declarations */
329struct scsi_device;
330struct ata_port_operations;
331struct ata_port;
332struct ata_queued_cmd;
333
334/* typedefs */
77853bf2 335typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
d4b2bab4
TH		 336typedef int (*ata_prereset_fn_t)(struct ata_port *ap, unsigned long deadline);
337typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes,
338 unsigned long deadline);
f5914a46 339typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
1da177e4
LT		 340
341struct ata_ioports {
0d5ff566
TH		 342 void __iomem *cmd_addr;
343 void __iomem *data_addr;
344 void __iomem *error_addr;
345 void __iomem *feature_addr;
346 void __iomem *nsect_addr;
347 void __iomem *lbal_addr;
348 void __iomem *lbam_addr;
349 void __iomem *lbah_addr;
350 void __iomem *device_addr;
351 void __iomem *status_addr;
352 void __iomem *command_addr;
353 void __iomem *altstatus_addr;
354 void __iomem *ctl_addr;
355 void __iomem *bmdma_addr;
356 void __iomem *scr_addr;
1da177e4
LT		 357};
358
cca3974e 359struct ata_host {
1da177e4
LT		 360 spinlock_t lock;
361 struct device *dev;
362 unsigned long irq;
2ec7df04 363 unsigned long irq2;
0d5ff566 364 void __iomem * const *iomap;
1da177e4
LT		 365 unsigned int n_ports;
366 void *private_data;
057ace5e 367 const struct ata_port_operations *ops;
5444a6f4 368 unsigned long flags;
fafbae87
TH		 369#ifdef CONFIG_ATA_ACPI
370 acpi_handle acpi_handle;
371#endif
032af1ce 372 struct ata_port *simplex_claimed; /* channel owning the DMA */
f0eb62b8 373 struct ata_port *ports[0];
1da177e4
LT		 374};
375
376struct ata_queued_cmd {
377 struct ata_port *ap;
378 struct ata_device *dev;
379
380 struct scsi_cmnd *scsicmd;
381 void (*scsidone)(struct scsi_cmnd *);
382
383 struct ata_taskfile tf;
384 u8 cdb[ATAPI_CDB_LEN];
385
386 unsigned long flags; /* ATA_QCFLAG_xxx */
387 unsigned int tag;
388 unsigned int n_elem;
cedc9a47 389 unsigned int orig_n_elem;
1da177e4
LT		 390
391 int dma_dir;
392
cedc9a47 393 unsigned int pad_len;
5a5dbd18 394 unsigned int sect_size;
cedc9a47 395
1da177e4
LT		 396 unsigned int nbytes;
397 unsigned int curbytes;
398
399 unsigned int cursg;
400 unsigned int cursg_ofs;
401
402 struct scatterlist sgent;
cedc9a47 403 struct scatterlist pad_sgent;
1da177e4
LT		 404 void *buf_virt;
405
cedc9a47
JG		 406 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
407 struct scatterlist *__sg;
1da177e4 408
a22e2eb0 409 unsigned int err_mask;
e61e0672 410 struct ata_taskfile result_tf;
1da177e4
LT		 411 ata_qc_cb_t complete_fn;
412
1da177e4
LT		 413 void *private_data;
414};
415
cca3974e 416struct ata_port_stats {
1da177e4
LT		 417 unsigned long unhandled_irq;
418 unsigned long idle_irq;
419 unsigned long rw_reqbuf;
420};
421
0c247c55
TH		 422struct ata_ering_entry {
423 int is_io;
424 unsigned int err_mask;
425 u64 timestamp;
426};
427
428struct ata_ering {
429 int cursor;
430 struct ata_ering_entry ring[ATA_ERING_SIZE];
431};
432
1da177e4 433struct ata_device {
38d87234 434 struct ata_port *ap;
72fa4b74 435 unsigned int devno; /* 0 or 1 */
1da177e4 436 unsigned long flags; /* ATA_DFLAG_xxx */
75683fe7 437 unsigned int horkage; /* List of broken features */
3edebac4 438 struct scsi_device *sdev; /* attached SCSI device */
fafbae87
TH		 439#ifdef CONFIG_ATA_ACPI
440 acpi_handle acpi_handle;
441#endif
72fa4b74
TH		 442 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
443 u64 n_sectors; /* size of device, if ATA */
1da177e4 444 unsigned int class; /* ATA_DEV_xxx */
fe635c7e 445 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
1da177e4
LT		 446 u8 pio_mode;
447 u8 dma_mode;
448 u8 xfer_mode;
449 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
450
8cbd6df1
AL		 451 unsigned int multi_count; /* sectors count for
452 READ/WRITE MULTIPLE */
b00eec1d 453 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 454 unsigned int cdb_len;
8bf62ece 455
acf356b1
TH		 456 /* per-dev xfer mask */
457 unsigned int pio_mask;
458 unsigned int mwdma_mask;
459 unsigned int udma_mask;
460
8bf62ece
AL		 461 /* for CHS addressing */
462 u16 cylinders; /* Number of cylinders */
463 u16 heads; /* Number of heads */
464 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 465
466 /* error history */
467 struct ata_ering ering;
7d47e8d4 468 int spdn_cnt;
1da177e4
LT		 469};
470
72fa4b74
TH		 471/* Offset into struct ata_device. Fields above it are maintained
472 * acress device init. Fields below are zeroed.
473 */
474#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
475
f3e81b19
TH		 476struct ata_eh_info {
477 struct ata_device *dev; /* offending device */
478 u32 serror; /* SError from LLDD */
479 unsigned int err_mask; /* port-wide err_mask */
480 unsigned int action; /* ATA_EH_* action mask */
47005f25 481 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 482 unsigned int flags; /* ATA_EHI_* flags */
abdda733 483
abdda733
TH		 484 unsigned int probe_mask;
485
f3e81b19
TH		 486 char desc[ATA_EH_DESC_LEN];
487 int desc_len;
488};
489
490struct ata_eh_context {
491 struct ata_eh_info i;
492 int tries[ATA_MAX_DEVICES];
abdda733
TH		 493 unsigned int classes[ATA_MAX_DEVICES];
494 unsigned int did_probe_mask;
f3e81b19
TH		 495};
496
64578a3d
TH		 497struct ata_acpi_drive
498{
499 u32 pio;
500 u32 dma;
501} __packed;
502
503struct ata_acpi_gtm {
504 struct ata_acpi_drive drive[2];
505 u32 flags;
506} __packed;
507
1da177e4 508struct ata_port {
cca3974e 509 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
057ace5e 510 const struct ata_port_operations *ops;
ba6a1308 511 spinlock_t *lock;
1da177e4 512 unsigned long flags; /* ATA_FLAG_xxx */
b51e9e5d 513 unsigned int pflags; /* ATA_PFLAG_xxx */
44877b4e
TH		 514 unsigned int print_id; /* user visible unique port ID */
515 unsigned int port_no; /* 0 based port no. inside the host */
1da177e4
LT		 516
517 struct ata_prd *prd; /* our SG list */
518 dma_addr_t prd_dma; /* and its DMA mapping */
519
cedc9a47
JG		 520 void *pad; /* array of DMA pad buffers */
521 dma_addr_t pad_dma;
522
1da177e4
LT		 523 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
524
525 u8 ctl; /* cache of ATA control register */
526 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 527 unsigned int pio_mask;
528 unsigned int mwdma_mask;
529 unsigned int udma_mask;
530 unsigned int cbl; /* cable type; ATA_CBL_xxx */
5a04bf4b 531 unsigned int hw_sata_spd_limit;
1c3fae4d 532 unsigned int sata_spd_limit; /* SATA PHY speed limit */
1da177e4 533
cca3974e 534 /* record runtime error info, protected by host lock */
f3e81b19
TH		 535 struct ata_eh_info eh_info;
536 /* EH context owned by EH */
537 struct ata_eh_context eh_context;
538
1da177e4
LT		 539 struct ata_device device[ATA_MAX_DEVICES];
540
541 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 542 unsigned long qc_allocated;
dedaf2b0
TH		 543 unsigned int qc_active;
544
1da177e4 545 unsigned int active_tag;
dedaf2b0 546 u32 sactive;
1da177e4 547
cca3974e
JG		 548 struct ata_port_stats stats;
549 struct ata_host *host;
2f1f610b 550 struct device *dev;
1da177e4 551
65f27f38 552 void *port_task_data;
52bad64d
DH		 553 struct delayed_work port_task;
554 struct delayed_work hotplug_task;
3b01b8af 555 struct work_struct scsi_rescan_task;
86e45b6b 556
14be71f4 557 unsigned int hsm_task_state;
1da177e4 558
bfd60579 559 u32 msg_enable;
a72ec4ce 560 struct list_head eh_done_q;
c6cf9e99 561 wait_queue_head_t eh_wait_q;
bfd60579 562
500530f6
TH		 563 pm_message_t pm_mesg;
564 int *pm_result;
565
1da177e4 566 void *private_data;
fe635c7e 567
fafbae87
TH		 568#ifdef CONFIG_ATA_ACPI
569 acpi_handle acpi_handle;
64578a3d 570 struct ata_acpi_gtm acpi_gtm;
fafbae87 571#endif
fe635c7e 572 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 573};
574
575struct ata_port_operations {
576 void (*port_disable) (struct ata_port *);
577
cd0d3bbc 578 void (*dev_config) (struct ata_device *);
1da177e4
LT		 579
580 void (*set_piomode) (struct ata_port *, struct ata_device *);
581 void (*set_dmamode) (struct ata_port *, struct ata_device *);
a76b62ca 582 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
1da177e4 583
057ace5e 584 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 585 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
586
057ace5e 587 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 588 u8 (*check_status)(struct ata_port *ap);
589 u8 (*check_altstatus)(struct ata_port *ap);
1da177e4
LT		 590 void (*dev_select)(struct ata_port *ap, unsigned int device);
591
c19ba8af 592 void (*phy_reset) (struct ata_port *ap); /* obsolete */
b229a7b0 593 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev);
c19ba8af 594
be0d18df
AC		 595 int (*cable_detect) (struct ata_port *ap);
596
b229a7b0 597 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
1da177e4
LT		 598
599 void (*bmdma_setup) (struct ata_queued_cmd *qc);
600 void (*bmdma_start) (struct ata_queued_cmd *qc);
601
a6b2c5d4
AC		 602 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
603
1da177e4 604 void (*qc_prep) (struct ata_queued_cmd *qc);
9a3d9eb0 605 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
1da177e4 606
9ec957f2
TH		 607 /* Error handlers. ->error_handler overrides ->eng_timeout and
608 * indicates that new-style EH is in place.
609 */
610 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
611
612 void (*freeze) (struct ata_port *ap);
613 void (*thaw) (struct ata_port *ap);
614 void (*error_handler) (struct ata_port *ap);
615 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
1da177e4 616
7d12e780 617 irq_handler_t irq_handler;
1da177e4 618 void (*irq_clear) (struct ata_port *);
83625006
AI		 619 u8 (*irq_on) (struct ata_port *);
620 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
1da177e4
LT		 621
622 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
623 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
624 u32 val);
625
500530f6
TH		 626 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
627 int (*port_resume) (struct ata_port *ap);
628
1da177e4
LT		 629 int (*port_start) (struct ata_port *ap);
630 void (*port_stop) (struct ata_port *ap);
631
cca3974e 632 void (*host_stop) (struct ata_host *host);
1da177e4 633
b73fc89f 634 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 635 u8 (*bmdma_status) (struct ata_port *ap);
636};
637
638struct ata_port_info {
d0be4a7d 639 struct scsi_host_template *sht;
cca3974e 640 unsigned long flags;
1da177e4
LT		 641 unsigned long pio_mask;
642 unsigned long mwdma_mask;
643 unsigned long udma_mask;
057ace5e 644 const struct ata_port_operations *port_ops;
21b0ad4f 645 irq_handler_t irq_handler;
e99f8b5e 646 void *private_data;
1da177e4
LT		 647};
648
452503f9
AC		 649struct ata_timing {
650 unsigned short mode; /* ATA mode */
651 unsigned short setup; /* t1 */
652 unsigned short act8b; /* t2 for 8-bit I/O */
653 unsigned short rec8b; /* t2i for 8-bit I/O */
654 unsigned short cyc8b; /* t0 for 8-bit I/O */
655 unsigned short active; /* t2 or tD */
656 unsigned short recover; /* t2i or tK */
657 unsigned short cycle; /* t0 */
658 unsigned short udma; /* t2CYCTYP/2 */
659};
660
661#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
1da177e4 662
e9c83914
TH		 663extern const unsigned long sata_deb_timing_normal[];
664extern const unsigned long sata_deb_timing_hotplug[];
665extern const unsigned long sata_deb_timing_long[];
666
dd5b06c4 667extern const struct ata_port_operations ata_dummy_port_ops;
21b0ad4f 668extern const struct ata_port_info ata_dummy_port_info;
dd5b06c4 669
e9c83914
TH		 670static inline const unsigned long *
671sata_ehc_deb_timing(struct ata_eh_context *ehc)
672{
673 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
674 return sata_deb_timing_hotplug;
675 else
676 return sata_deb_timing_normal;
677}
d7bb4cc7 678
dd5b06c4
TH		 679static inline int ata_port_is_dummy(struct ata_port *ap)
680{
681 return ap->ops == &ata_dummy_port_ops;
682}
683
43727fbc 684extern void sata_print_link_status(struct ata_port *ap);
1da177e4
LT		 685extern void ata_port_probe(struct ata_port *);
686extern void __sata_phy_reset(struct ata_port *ap);
687extern void sata_phy_reset(struct ata_port *ap);
688extern void ata_bus_reset(struct ata_port *ap);
3c567b7d 689extern int sata_set_spd(struct ata_port *ap);
d4b2bab4
TH		 690extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param,
691 unsigned long deadline);
692extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param,
693 unsigned long deadline);
694extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline);
695extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
696 unsigned long deadline);
697extern int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
698 unsigned long deadline);
699extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
700 unsigned long deadline);
c2bd5804 701extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
1da177e4
LT		 702extern void ata_port_disable(struct ata_port *);
703extern void ata_std_ports(struct ata_ioports *ioaddr);
704#ifdef CONFIG_PCI
1626aeb8
TH		 705extern int ata_pci_init_one (struct pci_dev *pdev,
706 const struct ata_port_info * const * ppi);
1da177e4 707extern void ata_pci_remove_one (struct pci_dev *pdev);
6ffa01d8 708#ifdef CONFIG_PM
3c5100c1 709extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
553c4aa6 710extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
3c5100c1 711extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
9b847548 712extern int ata_pci_device_resume(struct pci_dev *pdev);
6ffa01d8 713#endif
17bb34a3 714extern int ata_pci_clear_simplex(struct pci_dev *pdev);
1da177e4 715#endif /* CONFIG_PCI */
f3187195 716extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
f5cda257
TH		 717extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
718 const struct ata_port_info * const * ppi, int n_ports);
ecef7253 719extern int ata_host_start(struct ata_host *host);
f3187195
TH		 720extern int ata_host_register(struct ata_host *host,
721 struct scsi_host_template *sht);
f5cda257
TH		 722extern int ata_host_activate(struct ata_host *host, int irq,
723 irq_handler_t irq_handler, unsigned long irq_flags,
724 struct scsi_host_template *sht);
0529c159 725extern void ata_host_detach(struct ata_host *host);
cca3974e
JG		 726extern void ata_host_init(struct ata_host *, struct device *,
727 unsigned long, const struct ata_port_operations *);
193515d5 728extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 729extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
730extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
80289167 731extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 732extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 733 struct ata_port_info *, struct Scsi_Host *);
734extern int ata_sas_port_init(struct ata_port *);
735extern int ata_sas_port_start(struct ata_port *ap);
736extern void ata_sas_port_stop(struct ata_port *ap);
737extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
738extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
739 struct ata_port *ap);
1da177e4 740extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
34bf2170
TH		 741extern int sata_scr_valid(struct ata_port *ap);
742extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
743extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
744extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
745extern int ata_port_online(struct ata_port *ap);
746extern int ata_port_offline(struct ata_port *ap);
6ffa01d8 747#ifdef CONFIG_PM
cca3974e
JG		 748extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
749extern void ata_host_resume(struct ata_host *host);
6ffa01d8 750#endif
67846b30 751extern int ata_ratelimit(void);
d1adc1bb
TH		 752extern int ata_busy_sleep(struct ata_port *ap,
753 unsigned long timeout_pat, unsigned long timeout);
d4b2bab4 754extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
65f27f38 755extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
86e45b6b 756 void *data, unsigned long delay);
c22daff4
TH		 757extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
758 unsigned long interval_msec,
759 unsigned long timeout_msec);
a619f981 760extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
67846b30 761
1da177e4
LT		 762/*
763 * Default driver ops implementations
764 */
057ace5e 765extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 766extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
057ace5e
JG		 767extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
768extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1da177e4
LT		 769extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
770extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
771extern u8 ata_check_status(struct ata_port *ap);
772extern u8 ata_altstatus(struct ata_port *ap);
057ace5e 773extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 774extern int ata_port_start (struct ata_port *ap);
d92e74d3 775extern int ata_sff_port_start (struct ata_port *ap);
7d12e780 776extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
0d5ff566
TH		 777extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
778 unsigned int buflen, int write_data);
779extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
780 unsigned int buflen, int write_data);
d26fc955 781extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
1da177e4 782extern void ata_qc_prep(struct ata_queued_cmd *qc);
e46834cd 783extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
9a3d9eb0 784extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
1da177e4
LT		 785extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
786 unsigned int buflen);
787extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
788 unsigned int n_elem);
057ace5e 789extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
10305f0f 790extern void ata_dev_disable(struct ata_device *adev);
6a62a04d
TH		 791extern void ata_id_string(const u16 *id, unsigned char *s,
792 unsigned int ofs, unsigned int len);
793extern void ata_id_c_string(const u16 *id, unsigned char *s,
794 unsigned int ofs, unsigned int len);
10305f0f 795extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
1da177e4
LT		 796extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
797extern void ata_bmdma_start (struct ata_queued_cmd *qc);
b73fc89f 798extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 799extern u8 ata_bmdma_status(struct ata_port *ap);
800extern void ata_bmdma_irq_clear(struct ata_port *ap);
6d97dbd7
TH		 801extern void ata_bmdma_freeze(struct ata_port *ap);
802extern void ata_bmdma_thaw(struct ata_port *ap);
f5914a46 803extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
6d97dbd7
TH		 804 ata_reset_fn_t softreset,
805 ata_reset_fn_t hardreset,
806 ata_postreset_fn_t postreset);
807extern void ata_bmdma_error_handler(struct ata_port *ap);
808extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
9a1004d0
TH		 809extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
810 u8 status, int in_wq);
f686bcb8 811extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 812extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
813 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 814extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 815 void (*done)(struct scsi_cmnd *));
816extern int ata_std_bios_param(struct scsi_device *sdev,
817 struct block_device *bdev,
818 sector_t capacity, int geom[]);
819extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 820extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 821extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
822 int queue_depth);
3373efd8 823extern struct ata_device *ata_dev_pair(struct ata_device *adev);
04351821 824extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
83625006
AI		 825extern u8 ata_irq_on(struct ata_port *ap);
826extern u8 ata_dummy_irq_on(struct ata_port *ap);
827extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
828extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
1da177e4 829
be0d18df
AC		 830extern int ata_cable_40wire(struct ata_port *ap);
831extern int ata_cable_80wire(struct ata_port *ap);
832extern int ata_cable_sata(struct ata_port *ap);
833extern int ata_cable_unknown(struct ata_port *ap);
834
452503f9
AC		 835/*
836 * Timing helpers
837 */
1bc4ccff
AC		 838
839extern unsigned int ata_pio_need_iordy(const struct ata_device *);
452503f9
AC		 840extern int ata_timing_compute(struct ata_device *, unsigned short,
841 struct ata_timing *, int, int);
842extern void ata_timing_merge(const struct ata_timing *,
843 const struct ata_timing *, struct ata_timing *,
844 unsigned int);
845
846enum {
847 ATA_TIMING_SETUP = (1 << 0),
848 ATA_TIMING_ACT8B = (1 << 1),
849 ATA_TIMING_REC8B = (1 << 2),
850 ATA_TIMING_CYC8B = (1 << 3),
851 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
852 ATA_TIMING_CYC8B,
853 ATA_TIMING_ACTIVE = (1 << 4),
854 ATA_TIMING_RECOVER = (1 << 5),
855 ATA_TIMING_CYCLE = (1 << 6),
856 ATA_TIMING_UDMA = (1 << 7),
857 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
858 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
859 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
860 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
861};
862
1da177e4
LT		 863
864#ifdef CONFIG_PCI
865struct pci_bits {
866 unsigned int reg; /* PCI config register to read */
867 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
868 unsigned long mask;
869 unsigned long val;
870};
871
d583bc18 872extern int ata_pci_init_sff_host(struct ata_host *host);
1626aeb8 873extern int ata_pci_init_bmdma(struct ata_host *host);
d583bc18
TH		 874extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
875 const struct ata_port_info * const * ppi,
876 struct ata_host **r_host);
057ace5e 877extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
a76b62ca 878extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
1da177e4
LT		 879#endif /* CONFIG_PCI */
880
ece1d636
TH		 881/*
882 * EH
883 */
ece1d636 884extern void ata_eng_timeout(struct ata_port *ap);
7b70fc03
TH		 885
886extern void ata_port_schedule_eh(struct ata_port *ap);
887extern int ata_port_abort(struct ata_port *ap);
e3180499
TH		 888extern int ata_port_freeze(struct ata_port *ap);
889
890extern void ata_eh_freeze_port(struct ata_port *ap);
891extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 892
ece1d636
TH		 893extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
894extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
895
f5914a46
TH		 896extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
897 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
898 ata_postreset_fn_t postreset);
022bdb07 899
61440db6
TH		 900/*
901 * printk helpers
902 */
903#define ata_port_printk(ap, lv, fmt, args...) \
44877b4e 904 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
61440db6
TH		 905
906#define ata_dev_printk(dev, lv, fmt, args...) \
44877b4e 907 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args)
1da177e4 908
f3e81b19
TH		 909/*
910 * ata_eh_info helpers
911 */
912#define ata_ehi_push_desc(ehi, fmt, args...) do { \
913 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
914 ATA_EH_DESC_LEN - (ehi)->desc_len, \
915 fmt , ##args); \
916} while (0)
917
918#define ata_ehi_clear_desc(ehi) do { \
919 (ehi)->desc[0] = '\0'; \
920 (ehi)->desc_len = 0; \
921} while (0)
922
c0b6c037 923static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
084fe639 924{
28324304 925 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
084fe639
TH		 926 ehi->action |= ATA_EH_SOFTRESET;
927 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
928}
929
c0b6c037
TH		 930static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
931{
932 __ata_ehi_hotplugged(ehi);
933 ehi->err_mask |= AC_ERR_ATA_BUS;
934}
935
61440db6
TH		 936/*
937 * qc helpers
938 */
972c26bd
JG		 939static inline int
940ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
941{
942 if (sg == &qc->pad_sgent)
943 return 1;
944 if (qc->pad_len)
945 return 0;
946 if (((sg - qc->__sg) + 1) == qc->n_elem)
947 return 1;
948 return 0;
949}
950
cc1887f3
TH		 951static inline struct scatterlist *
952ata_qc_first_sg(struct ata_queued_cmd *qc)
953{
954 if (qc->n_elem)
955 return qc->__sg;
956 if (qc->pad_len)
957 return &qc->pad_sgent;
958 return NULL;
959}
960
cedc9a47
JG		 961static inline struct scatterlist *
962ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
963{
964 if (sg == &qc->pad_sgent)
965 return NULL;
966 if (++sg - qc->__sg < qc->n_elem)
967 return sg;
cc1887f3
TH		 968 if (qc->pad_len)
969 return &qc->pad_sgent;
970 return NULL;
cedc9a47
JG		 971}
972
973#define ata_for_each_sg(sg, qc) \
cc1887f3 974 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
cedc9a47 975
1da177e4
LT		 976static inline unsigned int ata_tag_valid(unsigned int tag)
977{
978 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
979}
980
2ab7db1f
TH		 981static inline unsigned int ata_tag_internal(unsigned int tag)
982{
983 return tag == ATA_MAX_QUEUE - 1;
984}
985
5806db22
TH		 986/*
987 * device helpers
988 */
e1211e3f 989static inline unsigned int ata_class_enabled(unsigned int class)
597afd21
TH		 990{
991 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
992}
993
e1211e3f 994static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 995{
e1211e3f
TH		 996 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
997}
998
002c8054
TH		 999static inline unsigned int ata_class_absent(unsigned int class)
1000{
1001 return !ata_class_enabled(class) && !ata_class_disabled(class);
1002}
1003
e1211e3f
TH		 1004static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1005{
1006 return ata_class_enabled(dev->class);
1007}
1008
1009static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1010{
1011 return ata_class_disabled(dev->class);
1da177e4
LT		 1012}
1013
002c8054
TH		 1014static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1015{
1016 return ata_class_absent(dev->class);
1017}
1018
5806db22
TH		 1019/*
1020 * port helpers
1021 */
1022static inline int ata_port_max_devices(const struct ata_port *ap)
1023{
1024 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1025 return 2;
1026 return 1;
1027}
1028
1029
1da177e4
LT		 1030static inline u8 ata_chk_status(struct ata_port *ap)
1031{
1032 return ap->ops->check_status(ap);
1033}
1034
6d1245bf
TH		 1035/**
1036 * ata_ncq_enabled - Test whether NCQ is enabled
1037 * @dev: ATA device to test for
1038 *
1039 * LOCKING:
1040 * spin_lock_irqsave(host lock)
1041 *
1042 * RETURNS:
1043 * 1 if NCQ is enabled for @dev, 0 otherwise.
1044 */
1045static inline int ata_ncq_enabled(struct ata_device *dev)
1046{
1047 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1048 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1049}
0baab86b
EF		 1050
1051/**
1052 * ata_pause - Flush writes and pause 400 nanoseconds.
1053 * @ap: Port to wait for.
1054 *
1055 * LOCKING:
1056 * Inherited from caller.
1057 */
1058
1da177e4
LT		 1059static inline void ata_pause(struct ata_port *ap)
1060{
1061 ata_altstatus(ap);
1062 ndelay(400);
1063}
1064
0baab86b
EF		 1065
1066/**
1067 * ata_busy_wait - Wait for a port status register
1068 * @ap: Port to wait for.
0777721c
AC		 1069 * @bits: bits that must be clear
1070 * @max: number of 10uS waits to perform
0baab86b
EF		 1071 *
1072 * Waits up to max*10 microseconds for the selected bits in the port's
1073 * status register to be cleared.
1074 * Returns final value of status register.
1075 *
1076 * LOCKING:
1077 * Inherited from caller.
1078 */
1079
1da177e4
LT		 1080static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1081 unsigned int max)
1082{
1083 u8 status;
1084
1085 do {
1086 udelay(10);
1087 status = ata_chk_status(ap);
1088 max--;
d1adc1bb 1089 } while (status != 0xff && (status & bits) && (max > 0));
1da177e4
LT		 1090
1091 return status;
1092}
1093
0baab86b
EF		 1094
1095/**
1096 * ata_wait_idle - Wait for a port to be idle.
1097 * @ap: Port to wait for.
1098 *
1099 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1100 * Returns final value of status register.
1101 *
1102 * LOCKING:
1103 * Inherited from caller.
1104 */
1105
1da177e4
LT		 1106static inline u8 ata_wait_idle(struct ata_port *ap)
1107{
1108 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1109
55f3952d
TH		 1110 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1111 DPRINTK("ATA: abnormal status 0x%X on port 0x%p\n",
1112 status, ap->ioaddr.status_addr);
1da177e4
LT		 1113
1114 return status;
1115}
1116
1117static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1118{
1119 qc->tf.ctl |= ATA_NIEN;
1120}
1121
f69499f4
TH		 1122static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1123 unsigned int tag)
1da177e4
LT		 1124{
1125 if (likely(ata_tag_valid(tag)))
1126 return &ap->qcmd[tag];
1127 return NULL;
1128}
1129
f69499f4
TH		 1130static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1131 unsigned int tag)
1132{
1133 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1134
1135 if (unlikely(!qc) || !ap->ops->error_handler)
1136 return qc;
1137
1138 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1139 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1140 return qc;
1141
1142 return NULL;
1143}
1144
3373efd8 1145static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1146{
1147 memset(tf, 0, sizeof(*tf));
1148
3373efd8
TH		 1149 tf->ctl = dev->ap->ctl;
1150 if (dev->devno == 0)
1da177e4
LT		 1151 tf->device = ATA_DEVICE_OBS;
1152 else
1153 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1154}
1155
2c13b7ce
JG		 1156static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1157{
501e0c50 1158 qc->dma_dir = DMA_NONE;
2c13b7ce
JG		 1159 qc->__sg = NULL;
1160 qc->flags = 0;
726f0785 1161 qc->cursg = qc->cursg_ofs = 0;
2c13b7ce 1162 qc->nbytes = qc->curbytes = 0;
7a801184 1163 qc->n_elem = 0;
a22e2eb0 1164 qc->err_mask = 0;
d0f29485 1165 qc->pad_len = 0;
5a5dbd18 1166 qc->sect_size = ATA_SECT_SIZE;
2c13b7ce 1167
3373efd8 1168 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1169
1170 /* init result_tf such that it indicates normal completion */
1171 qc->result_tf.command = ATA_DRDY;
1172 qc->result_tf.feature = 0;
2c13b7ce
JG		 1173}
1174
057ace5e 1175static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1176{
1177 return ata_id_wcache_enabled(dev->id) ||
1178 ata_id_has_flush(dev->id) ||
1179 ata_id_has_flush_ext(dev->id);
1180}
1181
a7dac447
JG		 1182static inline unsigned int ac_err_mask(u8 status)
1183{
3655d1d3 1184 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1185 return AC_ERR_HSM;
a7dac447
JG		 1186 if (status & (ATA_ERR | ATA_DF))
1187 return AC_ERR_DEV;
1188 return 0;
1189}
1190
1191static inline unsigned int __ac_err_mask(u8 status)
1192{
1193 unsigned int mask = ac_err_mask(status);
1194 if (mask == 0)
1195 return AC_ERR_OTHER;
1196 return mask;
1197}
1198
6037d6bb
JG		 1199static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1200{
1201 ap->pad_dma = 0;
f0d36efd
TH		 1202 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1203 &ap->pad_dma, GFP_KERNEL);
6037d6bb
JG		 1204 return (ap->pad == NULL) ? -ENOMEM : 0;
1205}
1206
1207static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1208{
f0d36efd 1209 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
6037d6bb
JG		 1210}
1211
35bb94b1
JG		 1212static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1213{
4911487a 1214 return *(struct ata_port **)&host->hostdata[0];
35bb94b1
JG		 1215}
1216
1da177e4 1217#endif /* __LINUX_LIBATA_H__ */
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