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[libata] sata_vsc: partially revert a PCI ID-related commit
[mirror_ubuntu-bionic-kernel.git] / include / linux / libata.h
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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>
1da177e4
LT		 33#include <asm/io.h>
34#include <linux/ata.h>
35#include <linux/workqueue.h>
35bb94b1 36#include <scsi/scsi_host.h>
1da177e4
LT		 37
38/*
bfd60579
RD		 39 * compile-time options: to be removed as soon as all the drivers are
40 * converted to the new debugging mechanism
1da177e4
LT		 41 */
42#undef ATA_DEBUG /* debugging output */
43#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
44#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
45#undef ATA_NDEBUG /* define to disable quick runtime checks */
1da177e4
LT		 46#undef ATA_ENABLE_PATA /* define to enable PATA support in some
47 * low-level drivers */
1da177e4
LT		 48
49
50/* note: prints function name for you */
51#ifdef ATA_DEBUG
52#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
53#ifdef ATA_VERBOSE_DEBUG
54#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
55#else
56#define VPRINTK(fmt, args...)
57#endif /* ATA_VERBOSE_DEBUG */
58#else
59#define DPRINTK(fmt, args...)
60#define VPRINTK(fmt, args...)
61#endif /* ATA_DEBUG */
62
2c13b7ce
JG		 63#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
64
bfd60579
RD		 65/* NEW: debug levels */
66#define HAVE_LIBATA_MSG 1
67
68enum {
69 ATA_MSG_DRV = 0x0001,
70 ATA_MSG_INFO = 0x0002,
71 ATA_MSG_PROBE = 0x0004,
72 ATA_MSG_WARN = 0x0008,
73 ATA_MSG_MALLOC = 0x0010,
74 ATA_MSG_CTL = 0x0020,
75 ATA_MSG_INTR = 0x0040,
76 ATA_MSG_ERR = 0x0080,
77};
78
79#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
80#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
81#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
82#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
83#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
84#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
85#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
86#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
87
88static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
89{
90 if (dval < 0 || dval >= (sizeof(u32) * 8))
91 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
92 if (!dval)
93 return 0;
94 return (1 << dval) - 1;
95}
96
1da177e4
LT		 97/* defines only for the constants which don't work well as enums */
98#define ATA_TAG_POISON 0xfafbfcfdU
99
100/* move to PCI layer? */
101static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
102{
103 return &pdev->dev;
104}
105
106enum {
107 /* various global constants */
108 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
109 ATA_MAX_PORTS = 8,
110 ATA_DEF_QUEUE = 1,
2ab7db1f 111 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
a6e6ce8e 112 ATA_MAX_QUEUE = 32,
2ab7db1f 113 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
1da177e4 114 ATA_MAX_SECTORS = 200, /* FIXME */
200d5a76 115 ATA_MAX_SECTORS_LBA48 = 65535,
1da177e4
LT		 116 ATA_MAX_BUS = 2,
117 ATA_DEF_BUSY_WAIT = 10000,
118 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
119
120 ATA_SHT_EMULATED = 1,
121 ATA_SHT_CMD_PER_LUN = 1,
122 ATA_SHT_THIS_ID = -1,
cf482935 123 ATA_SHT_USE_CLUSTERING = 1,
1da177e4
LT		 124
125 /* struct ata_device stuff */
949b38af
TH		 126 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
127 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
029f5468 128 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
88e49034 129 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
ea1dd4e1 130 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
949b38af
TH		 131
132 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */
72fa4b74 133 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
1da177e4 134
abdda733
TH		 135 ATA_DFLAG_DETACH = (1 << 16),
136 ATA_DFLAG_DETACHED = (1 << 17),
137
1da177e4
LT		 138 ATA_DEV_UNKNOWN = 0, /* unknown device */
139 ATA_DEV_ATA = 1, /* ATA device */
140 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
141 ATA_DEV_ATAPI = 3, /* ATAPI device */
142 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
143 ATA_DEV_NONE = 5, /* no device */
144
145 /* struct ata_port flags */
949b38af 146 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
1da177e4 147 /* (doesn't imply presence) */
949b38af
TH		 148 ATA_FLAG_SATA = (1 << 1),
149 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
150 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
151 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
152 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
153 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
154 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
155 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
7395acb2
TH		 156 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
157 * doesn't handle PIO interrupts */
158 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
abdda733
TH		 159 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
160 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
161 * Register FIS clearing BSY */
949b38af 162
7395acb2
TH		 163 ATA_FLAG_DEBUGMSG = (1 << 13),
164 ATA_FLAG_FLUSH_PORT_TASK = (1 << 14), /* flush port task */
949b38af 165
7395acb2 166 ATA_FLAG_EH_PENDING = (1 << 15), /* EH pending */
c6cf9e99 167 ATA_FLAG_EH_IN_PROGRESS = (1 << 16), /* EH in progress */
9ec957f2 168 ATA_FLAG_FROZEN = (1 << 17), /* port is frozen */
9be1e979 169 ATA_FLAG_RECOVERED = (1 << 18), /* recovery action performed */
abdda733
TH		 170 ATA_FLAG_LOADING = (1 << 19), /* boot/loading probe */
171 ATA_FLAG_UNLOADING = (1 << 20), /* module is unloading */
172 ATA_FLAG_SCSI_HOTPLUG = (1 << 21), /* SCSI hotplug scheduled */
9ec957f2
TH		 173
174 ATA_FLAG_DISABLED = (1 << 22), /* port is disabled, ignore it */
175 ATA_FLAG_SUSPENDED = (1 << 23), /* port is suspended (power) */
949b38af
TH		 176
177 /* bits 24:31 of ap->flags are reserved for LLDD specific flags */
178
179 /* struct ata_queued_cmd flags */
180 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
181 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
182 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
1da177e4 183 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
27197367 184 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672
TH		 185 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
186
9ec957f2
TH		 187 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
188 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
189 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 190
4e5ec5db
AC		 191 /* host set flags */
192 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */
193
1da177e4 194 /* various lengths of time */
8d238e01
AC		 195 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
196 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
a2a7a662
TH		 197 ATA_TMOUT_INTERNAL = 30 * HZ,
198 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
1da177e4
LT		 199
200 /* ATA bus states */
201 BUS_UNKNOWN = 0,
202 BUS_DMA = 1,
203 BUS_IDLE = 2,
204 BUS_NOINTR = 3,
205 BUS_NODATA = 4,
206 BUS_TIMER = 5,
207 BUS_PIO = 6,
208 BUS_EDD = 7,
209 BUS_IDENTIFY = 8,
210 BUS_PACKET = 9,
211
212 /* SATA port states */
213 PORT_UNKNOWN = 0,
214 PORT_ENABLED = 1,
215 PORT_DISABLED = 2,
216
217 /* encoding various smaller bitmaps into a single
1da7b0d0 218 * unsigned int bitmap
1da177e4 219 */
1da7b0d0
TH		 220 ATA_BITS_PIO = 5,
221 ATA_BITS_MWDMA = 3,
222 ATA_BITS_UDMA = 8,
223
224 ATA_SHIFT_PIO = 0,
225 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
226 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
227
228 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
229 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
230 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
cedc9a47
JG		 231
232 /* size of buffer to pad xfers ending on unaligned boundaries */
233 ATA_DMA_PAD_SZ = 4,
234 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
949b38af
TH		 235
236 /* masks for port functions */
47a86593
AC		 237 ATA_PORT_PRIMARY = (1 << 0),
238 ATA_PORT_SECONDARY = (1 << 1),
14d2bac1 239
0c247c55
TH		 240 /* ering size */
241 ATA_ERING_SIZE = 32,
242
f3e81b19
TH		 243 /* desc_len for ata_eh_info and context */
244 ATA_EH_DESC_LEN = 80,
245
9be1e979
TH		 246 /* reset / recovery action types */
247 ATA_EH_REVALIDATE = (1 << 0),
248 ATA_EH_SOFTRESET = (1 << 1),
249 ATA_EH_HARDRESET = (1 << 2),
250
251 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
47005f25 252 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
9be1e979 253
f3e81b19 254 /* ata_eh_info->flags */
abdda733
TH		 255 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
256
257 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
f3e81b19 258
ad9e2762
TH		 259 /* max repeat if error condition is still set after ->error_handler */
260 ATA_EH_MAX_REPEAT = 5,
261
14d2bac1
TH		 262 /* how hard are we gonna try to probe/recover devices */
263 ATA_PROBE_MAX_TRIES = 3,
022bdb07
TH		 264 ATA_EH_RESET_TRIES = 3,
265 ATA_EH_DEV_TRIES = 3,
f5914a46
TH		 266
267 /* Drive spinup time (time from power-on to the first D2H FIS)
268 * in msecs - 8s currently. Failing to get ready in this time
269 * isn't critical. It will result in reset failure for
270 * controllers which can't wait for the first D2H FIS. libata
271 * will retry, so it just has to be long enough to spin up
272 * most devices.
273 */
274 ATA_SPINUP_WAIT = 8000,
1da177e4
LT		 275};
276
14be71f4 277enum hsm_task_states {
c56b14d2
AL		 278 HSM_ST_UNKNOWN, /* state unknown */
279 HSM_ST_IDLE, /* no command on going */
c56b14d2
AL		 280 HSM_ST, /* (waiting the device to) transfer data */
281 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2
AL		 282 HSM_ST_ERR, /* error */
283 HSM_ST_FIRST, /* (waiting the device to)
284 write CDB or first data block */
1da177e4
LT		 285};
286
a7dac447 287enum ata_completion_errors {
11a56d24
TH		 288 AC_ERR_DEV = (1 << 0), /* device reported error */
289 AC_ERR_HSM = (1 << 1), /* host state machine violation */
290 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
291 AC_ERR_MEDIA = (1 << 3), /* media error */
292 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
293 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
294 AC_ERR_SYSTEM = (1 << 6), /* system error */
295 AC_ERR_INVALID = (1 << 7), /* invalid argument */
296 AC_ERR_OTHER = (1 << 8), /* unknown */
a7dac447
JG		 297};
298
1da177e4
LT		 299/* forward declarations */
300struct scsi_device;
301struct ata_port_operations;
302struct ata_port;
303struct ata_queued_cmd;
304
305/* typedefs */
77853bf2 306typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
f5914a46
TH		 307typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
308typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
309typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
1da177e4
LT		 310
311struct ata_ioports {
312 unsigned long cmd_addr;
313 unsigned long data_addr;
314 unsigned long error_addr;
315 unsigned long feature_addr;
316 unsigned long nsect_addr;
317 unsigned long lbal_addr;
318 unsigned long lbam_addr;
319 unsigned long lbah_addr;
320 unsigned long device_addr;
321 unsigned long status_addr;
322 unsigned long command_addr;
323 unsigned long altstatus_addr;
324 unsigned long ctl_addr;
325 unsigned long bmdma_addr;
326 unsigned long scr_addr;
327};
328
329struct ata_probe_ent {
330 struct list_head node;
331 struct device *dev;
057ace5e 332 const struct ata_port_operations *port_ops;
193515d5 333 struct scsi_host_template *sht;
1da177e4
LT		 334 struct ata_ioports port[ATA_MAX_PORTS];
335 unsigned int n_ports;
336 unsigned int hard_port_no;
337 unsigned int pio_mask;
338 unsigned int mwdma_mask;
339 unsigned int udma_mask;
340 unsigned int legacy_mode;
341 unsigned long irq;
342 unsigned int irq_flags;
343 unsigned long host_flags;
4e5ec5db 344 unsigned long host_set_flags;
1da177e4
LT		 345 void __iomem *mmio_base;
346 void *private_data;
347};
348
349struct ata_host_set {
350 spinlock_t lock;
351 struct device *dev;
352 unsigned long irq;
353 void __iomem *mmio_base;
354 unsigned int n_ports;
355 void *private_data;
057ace5e 356 const struct ata_port_operations *ops;
5444a6f4
AC		 357 unsigned long flags;
358 int simplex_claimed; /* Keep seperate in case we
359 ever need to do this locked */
f0eb62b8
TH		 360 struct ata_host_set *next; /* for legacy mode */
361 struct ata_port *ports[0];
1da177e4
LT		 362};
363
364struct ata_queued_cmd {
365 struct ata_port *ap;
366 struct ata_device *dev;
367
368 struct scsi_cmnd *scsicmd;
369 void (*scsidone)(struct scsi_cmnd *);
370
371 struct ata_taskfile tf;
372 u8 cdb[ATAPI_CDB_LEN];
373
374 unsigned long flags; /* ATA_QCFLAG_xxx */
375 unsigned int tag;
376 unsigned int n_elem;
cedc9a47 377 unsigned int orig_n_elem;
1da177e4
LT		 378
379 int dma_dir;
380
cedc9a47
JG		 381 unsigned int pad_len;
382
1da177e4
LT		 383 unsigned int nsect;
384 unsigned int cursect;
385
386 unsigned int nbytes;
387 unsigned int curbytes;
388
389 unsigned int cursg;
390 unsigned int cursg_ofs;
391
392 struct scatterlist sgent;
cedc9a47 393 struct scatterlist pad_sgent;
1da177e4
LT		 394 void *buf_virt;
395
cedc9a47
JG		 396 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
397 struct scatterlist *__sg;
1da177e4 398
a22e2eb0 399 unsigned int err_mask;
e61e0672 400 struct ata_taskfile result_tf;
1da177e4
LT		 401 ata_qc_cb_t complete_fn;
402
1da177e4
LT		 403 void *private_data;
404};
405
406struct ata_host_stats {
407 unsigned long unhandled_irq;
408 unsigned long idle_irq;
409 unsigned long rw_reqbuf;
410};
411
0c247c55
TH		 412struct ata_ering_entry {
413 int is_io;
414 unsigned int err_mask;
415 u64 timestamp;
416};
417
418struct ata_ering {
419 int cursor;
420 struct ata_ering_entry ring[ATA_ERING_SIZE];
421};
422
1da177e4 423struct ata_device {
38d87234 424 struct ata_port *ap;
72fa4b74 425 unsigned int devno; /* 0 or 1 */
1da177e4 426 unsigned long flags; /* ATA_DFLAG_xxx */
3edebac4 427 struct scsi_device *sdev; /* attached SCSI device */
72fa4b74
TH		 428 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
429 u64 n_sectors; /* size of device, if ATA */
1da177e4 430 unsigned int class; /* ATA_DEV_xxx */
fe635c7e 431 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
1da177e4
LT		 432 u8 pio_mode;
433 u8 dma_mode;
434 u8 xfer_mode;
435 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
436
8cbd6df1
AL		 437 unsigned int multi_count; /* sectors count for
438 READ/WRITE MULTIPLE */
b00eec1d 439 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 440 unsigned int cdb_len;
8bf62ece 441
acf356b1
TH		 442 /* per-dev xfer mask */
443 unsigned int pio_mask;
444 unsigned int mwdma_mask;
445 unsigned int udma_mask;
446
8bf62ece
AL		 447 /* for CHS addressing */
448 u16 cylinders; /* Number of cylinders */
449 u16 heads; /* Number of heads */
450 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 451
452 /* error history */
453 struct ata_ering ering;
1da177e4
LT		 454};
455
72fa4b74
TH		 456/* Offset into struct ata_device. Fields above it are maintained
457 * acress device init. Fields below are zeroed.
458 */
459#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
460
f3e81b19
TH		 461struct ata_eh_info {
462 struct ata_device *dev; /* offending device */
463 u32 serror; /* SError from LLDD */
464 unsigned int err_mask; /* port-wide err_mask */
465 unsigned int action; /* ATA_EH_* action mask */
47005f25 466 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 467 unsigned int flags; /* ATA_EHI_* flags */
abdda733
TH		 468
469 unsigned long hotplug_timestamp;
470 unsigned int probe_mask;
471
f3e81b19
TH		 472 char desc[ATA_EH_DESC_LEN];
473 int desc_len;
474};
475
476struct ata_eh_context {
477 struct ata_eh_info i;
478 int tries[ATA_MAX_DEVICES];
abdda733
TH		 479 unsigned int classes[ATA_MAX_DEVICES];
480 unsigned int did_probe_mask;
f3e81b19
TH		 481};
482
1da177e4
LT		 483struct ata_port {
484 struct Scsi_Host *host; /* our co-allocated scsi host */
057ace5e 485 const struct ata_port_operations *ops;
ba6a1308 486 spinlock_t *lock;
1da177e4
LT		 487 unsigned long flags; /* ATA_FLAG_xxx */
488 unsigned int id; /* unique id req'd by scsi midlyr */
489 unsigned int port_no; /* unique port #; from zero */
490 unsigned int hard_port_no; /* hardware port #; from zero */
491
492 struct ata_prd *prd; /* our SG list */
493 dma_addr_t prd_dma; /* and its DMA mapping */
494
cedc9a47
JG		 495 void *pad; /* array of DMA pad buffers */
496 dma_addr_t pad_dma;
497
1da177e4
LT		 498 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
499
500 u8 ctl; /* cache of ATA control register */
501 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 502 unsigned int pio_mask;
503 unsigned int mwdma_mask;
504 unsigned int udma_mask;
505 unsigned int cbl; /* cable type; ATA_CBL_xxx */
5a04bf4b 506 unsigned int hw_sata_spd_limit;
1c3fae4d 507 unsigned int sata_spd_limit; /* SATA PHY speed limit */
1da177e4 508
f3e81b19
TH		 509 /* record runtime error info, protected by host_set lock */
510 struct ata_eh_info eh_info;
511 /* EH context owned by EH */
512 struct ata_eh_context eh_context;
513
1da177e4
LT		 514 struct ata_device device[ATA_MAX_DEVICES];
515
516 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 517 unsigned long qc_allocated;
dedaf2b0
TH		 518 unsigned int qc_active;
519
1da177e4 520 unsigned int active_tag;
dedaf2b0 521 u32 sactive;
1da177e4
LT		 522
523 struct ata_host_stats stats;
524 struct ata_host_set *host_set;
2f1f610b 525 struct device *dev;
1da177e4 526
9a9c77dc
TH		 527 struct work_struct port_task;
528 struct work_struct hotplug_task;
3b01b8af 529 struct work_struct scsi_rescan_task;
86e45b6b 530
14be71f4 531 unsigned int hsm_task_state;
1da177e4 532
bfd60579 533 u32 msg_enable;
a72ec4ce 534 struct list_head eh_done_q;
c6cf9e99 535 wait_queue_head_t eh_wait_q;
bfd60579 536
1da177e4 537 void *private_data;
fe635c7e
TH		 538
539 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 540};
541
542struct ata_port_operations {
543 void (*port_disable) (struct ata_port *);
544
545 void (*dev_config) (struct ata_port *, struct ata_device *);
546
547 void (*set_piomode) (struct ata_port *, struct ata_device *);
548 void (*set_dmamode) (struct ata_port *, struct ata_device *);
5444a6f4 549 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
1da177e4 550
057ace5e 551 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 552 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
553
057ace5e 554 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 555 u8 (*check_status)(struct ata_port *ap);
556 u8 (*check_altstatus)(struct ata_port *ap);
1da177e4
LT		 557 void (*dev_select)(struct ata_port *ap, unsigned int device);
558
c19ba8af 559 void (*phy_reset) (struct ata_port *ap); /* obsolete */
e35a9e01 560 void (*set_mode) (struct ata_port *ap);
c19ba8af 561
1da177e4
LT		 562 void (*post_set_mode) (struct ata_port *ap);
563
564 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
565
566 void (*bmdma_setup) (struct ata_queued_cmd *qc);
567 void (*bmdma_start) (struct ata_queued_cmd *qc);
568
a6b2c5d4
AC		 569 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
570
1da177e4 571 void (*qc_prep) (struct ata_queued_cmd *qc);
9a3d9eb0 572 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
1da177e4 573
9ec957f2
TH		 574 /* Error handlers. ->error_handler overrides ->eng_timeout and
575 * indicates that new-style EH is in place.
576 */
577 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
578
579 void (*freeze) (struct ata_port *ap);
580 void (*thaw) (struct ata_port *ap);
581 void (*error_handler) (struct ata_port *ap);
582 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
1da177e4
LT		 583
584 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
585 void (*irq_clear) (struct ata_port *);
586
587 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
588 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
589 u32 val);
590
591 int (*port_start) (struct ata_port *ap);
592 void (*port_stop) (struct ata_port *ap);
593
594 void (*host_stop) (struct ata_host_set *host_set);
595
b73fc89f 596 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 597 u8 (*bmdma_status) (struct ata_port *ap);
598};
599
600struct ata_port_info {
d0be4a7d 601 struct scsi_host_template *sht;
1da177e4
LT		 602 unsigned long host_flags;
603 unsigned long pio_mask;
604 unsigned long mwdma_mask;
605 unsigned long udma_mask;
057ace5e 606 const struct ata_port_operations *port_ops;
e99f8b5e 607 void *private_data;
1da177e4
LT		 608};
609
452503f9
AC		 610struct ata_timing {
611 unsigned short mode; /* ATA mode */
612 unsigned short setup; /* t1 */
613 unsigned short act8b; /* t2 for 8-bit I/O */
614 unsigned short rec8b; /* t2i for 8-bit I/O */
615 unsigned short cyc8b; /* t0 for 8-bit I/O */
616 unsigned short active; /* t2 or tD */
617 unsigned short recover; /* t2i or tK */
618 unsigned short cycle; /* t0 */
619 unsigned short udma; /* t2CYCTYP/2 */
620};
621
622#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
1da177e4 623
d7bb4cc7
TH		 624extern const unsigned long sata_deb_timing_boot[];
625extern const unsigned long sata_deb_timing_eh[];
626extern const unsigned long sata_deb_timing_before_fsrst[];
627
1da177e4
LT		 628extern void ata_port_probe(struct ata_port *);
629extern void __sata_phy_reset(struct ata_port *ap);
630extern void sata_phy_reset(struct ata_port *ap);
631extern void ata_bus_reset(struct ata_port *ap);
3c567b7d 632extern int sata_set_spd(struct ata_port *ap);
d7bb4cc7
TH		 633extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
634extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
f5914a46 635extern int ata_std_prereset(struct ata_port *ap);
2bf2cb26
TH		 636extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
637extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
c2bd5804 638extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
3373efd8 639extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
1da177e4
LT		 640extern void ata_port_disable(struct ata_port *);
641extern void ata_std_ports(struct ata_ioports *ioaddr);
642#ifdef CONFIG_PCI
643extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
644 unsigned int n_ports);
645extern void ata_pci_remove_one (struct pci_dev *pdev);
9b847548
JA		 646extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
647extern int ata_pci_device_resume(struct pci_dev *pdev);
17bb34a3 648extern int ata_pci_clear_simplex(struct pci_dev *pdev);
1da177e4 649#endif /* CONFIG_PCI */
057ace5e 650extern int ata_device_add(const struct ata_probe_ent *ent);
720ba126 651extern void ata_port_detach(struct ata_port *ap);
17b14451 652extern void ata_host_set_remove(struct ata_host_set *host_set);
193515d5 653extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 654extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
655extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
1da177e4
LT		 656extern int ata_scsi_release(struct Scsi_Host *host);
657extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
34bf2170
TH		 658extern int sata_scr_valid(struct ata_port *ap);
659extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
660extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
661extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
662extern int ata_port_online(struct ata_port *ap);
663extern int ata_port_offline(struct ata_port *ap);
9b847548 664extern int ata_scsi_device_resume(struct scsi_device *);
082776e4 665extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state);
3373efd8
TH		 666extern int ata_device_resume(struct ata_device *);
667extern int ata_device_suspend(struct ata_device *, pm_message_t state);
67846b30 668extern int ata_ratelimit(void);
6f8b9958
TH		 669extern unsigned int ata_busy_sleep(struct ata_port *ap,
670 unsigned long timeout_pat,
671 unsigned long timeout);
86e45b6b
TH		 672extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
673 void *data, unsigned long delay);
c22daff4
TH		 674extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
675 unsigned long interval_msec,
676 unsigned long timeout_msec);
67846b30 677
1da177e4
LT		 678/*
679 * Default driver ops implementations
680 */
057ace5e 681extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 682extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
057ace5e
JG		 683extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
684extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1da177e4
LT		 685extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
686extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
687extern u8 ata_check_status(struct ata_port *ap);
688extern u8 ata_altstatus(struct ata_port *ap);
057ace5e 689extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 690extern int ata_port_start (struct ata_port *ap);
691extern void ata_port_stop (struct ata_port *ap);
aa8f0dc6 692extern void ata_host_stop (struct ata_host_set *host_set);
1da177e4 693extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
a6b2c5d4
AC		 694extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
695 unsigned int buflen, int write_data);
696extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
697 unsigned int buflen, int write_data);
75e99585
AC		 698extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
699 unsigned int buflen, int write_data);
1da177e4 700extern void ata_qc_prep(struct ata_queued_cmd *qc);
e46834cd 701extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
9a3d9eb0 702extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
1da177e4
LT		 703extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
704 unsigned int buflen);
705extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
706 unsigned int n_elem);
057ace5e 707extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
6a62a04d
TH		 708extern void ata_id_string(const u16 *id, unsigned char *s,
709 unsigned int ofs, unsigned int len);
710extern void ata_id_c_string(const u16 *id, unsigned char *s,
711 unsigned int ofs, unsigned int len);
1da177e4
LT		 712extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
713extern void ata_bmdma_start (struct ata_queued_cmd *qc);
b73fc89f 714extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 715extern u8 ata_bmdma_status(struct ata_port *ap);
716extern void ata_bmdma_irq_clear(struct ata_port *ap);
6d97dbd7
TH		 717extern void ata_bmdma_freeze(struct ata_port *ap);
718extern void ata_bmdma_thaw(struct ata_port *ap);
f5914a46 719extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
6d97dbd7
TH		 720 ata_reset_fn_t softreset,
721 ata_reset_fn_t hardreset,
722 ata_postreset_fn_t postreset);
723extern void ata_bmdma_error_handler(struct ata_port *ap);
724extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
9a1004d0
TH		 725extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
726 u8 status, int in_wq);
f686bcb8 727extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 728extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
729 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 730extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 731 void (*done)(struct scsi_cmnd *));
732extern int ata_std_bios_param(struct scsi_device *sdev,
733 struct block_device *bdev,
734 sector_t capacity, int geom[]);
735extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 736extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 737extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
738 int queue_depth);
3373efd8 739extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1da177e4 740
452503f9
AC		 741/*
742 * Timing helpers
743 */
1bc4ccff
AC		 744
745extern unsigned int ata_pio_need_iordy(const struct ata_device *);
452503f9
AC		 746extern int ata_timing_compute(struct ata_device *, unsigned short,
747 struct ata_timing *, int, int);
748extern void ata_timing_merge(const struct ata_timing *,
749 const struct ata_timing *, struct ata_timing *,
750 unsigned int);
751
752enum {
753 ATA_TIMING_SETUP = (1 << 0),
754 ATA_TIMING_ACT8B = (1 << 1),
755 ATA_TIMING_REC8B = (1 << 2),
756 ATA_TIMING_CYC8B = (1 << 3),
757 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
758 ATA_TIMING_CYC8B,
759 ATA_TIMING_ACTIVE = (1 << 4),
760 ATA_TIMING_RECOVER = (1 << 5),
761 ATA_TIMING_CYCLE = (1 << 6),
762 ATA_TIMING_UDMA = (1 << 7),
763 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
764 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
765 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
766 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
767};
768
1da177e4
LT		 769
770#ifdef CONFIG_PCI
771struct pci_bits {
772 unsigned int reg; /* PCI config register to read */
773 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
774 unsigned long mask;
775 unsigned long val;
776};
777
374b1873 778extern void ata_pci_host_stop (struct ata_host_set *host_set);
1da177e4 779extern struct ata_probe_ent *
47a86593 780ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
057ace5e 781extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
17bb34a3 782extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
1da177e4
LT		 783#endif /* CONFIG_PCI */
784
ece1d636
TH		 785/*
786 * EH
787 */
ece1d636 788extern void ata_eng_timeout(struct ata_port *ap);
7b70fc03
TH		 789
790extern void ata_port_schedule_eh(struct ata_port *ap);
791extern int ata_port_abort(struct ata_port *ap);
e3180499
TH		 792extern int ata_port_freeze(struct ata_port *ap);
793
794extern void ata_eh_freeze_port(struct ata_port *ap);
795extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 796
ece1d636
TH		 797extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
798extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
799
f5914a46
TH		 800extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
801 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
802 ata_postreset_fn_t postreset);
022bdb07 803
61440db6
TH		 804/*
805 * printk helpers
806 */
807#define ata_port_printk(ap, lv, fmt, args...) \
808 printk(lv"ata%u: "fmt, (ap)->id , ##args)
809
810#define ata_dev_printk(dev, lv, fmt, args...) \
811 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
1da177e4 812
f3e81b19
TH		 813/*
814 * ata_eh_info helpers
815 */
816#define ata_ehi_push_desc(ehi, fmt, args...) do { \
817 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
818 ATA_EH_DESC_LEN - (ehi)->desc_len, \
819 fmt , ##args); \
820} while (0)
821
822#define ata_ehi_clear_desc(ehi) do { \
823 (ehi)->desc[0] = '\0'; \
824 (ehi)->desc_len = 0; \
825} while (0)
826
084fe639
TH		 827static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
828{
829 if (ehi->flags & ATA_EHI_HOTPLUGGED)
830 return;
831
832 ehi->flags |= ATA_EHI_HOTPLUGGED;
833 ehi->hotplug_timestamp = jiffies;
834
835 ehi->err_mask |= AC_ERR_ATA_BUS;
836 ehi->action |= ATA_EH_SOFTRESET;
837 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
838}
839
61440db6
TH		 840/*
841 * qc helpers
842 */
972c26bd
JG		 843static inline int
844ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
845{
846 if (sg == &qc->pad_sgent)
847 return 1;
848 if (qc->pad_len)
849 return 0;
850 if (((sg - qc->__sg) + 1) == qc->n_elem)
851 return 1;
852 return 0;
853}
854
cc1887f3
TH		 855static inline struct scatterlist *
856ata_qc_first_sg(struct ata_queued_cmd *qc)
857{
858 if (qc->n_elem)
859 return qc->__sg;
860 if (qc->pad_len)
861 return &qc->pad_sgent;
862 return NULL;
863}
864
cedc9a47
JG		 865static inline struct scatterlist *
866ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
867{
868 if (sg == &qc->pad_sgent)
869 return NULL;
870 if (++sg - qc->__sg < qc->n_elem)
871 return sg;
cc1887f3
TH		 872 if (qc->pad_len)
873 return &qc->pad_sgent;
874 return NULL;
cedc9a47
JG		 875}
876
877#define ata_for_each_sg(sg, qc) \
cc1887f3 878 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
cedc9a47 879
1da177e4
LT		 880static inline unsigned int ata_tag_valid(unsigned int tag)
881{
882 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
883}
884
2ab7db1f
TH		 885static inline unsigned int ata_tag_internal(unsigned int tag)
886{
887 return tag == ATA_MAX_QUEUE - 1;
888}
889
e1211e3f 890static inline unsigned int ata_class_enabled(unsigned int class)
597afd21
TH		 891{
892 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
893}
894
e1211e3f 895static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 896{
e1211e3f
TH		 897 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
898}
899
002c8054
TH		 900static inline unsigned int ata_class_absent(unsigned int class)
901{
902 return !ata_class_enabled(class) && !ata_class_disabled(class);
903}
904
e1211e3f
TH		 905static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
906{
907 return ata_class_enabled(dev->class);
908}
909
910static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
911{
912 return ata_class_disabled(dev->class);
1da177e4
LT		 913}
914
002c8054
TH		 915static inline unsigned int ata_dev_absent(const struct ata_device *dev)
916{
917 return ata_class_absent(dev->class);
918}
919
1da177e4
LT		 920static inline u8 ata_chk_status(struct ata_port *ap)
921{
922 return ap->ops->check_status(ap);
923}
924
0baab86b
EF		 925
926/**
927 * ata_pause - Flush writes and pause 400 nanoseconds.
928 * @ap: Port to wait for.
929 *
930 * LOCKING:
931 * Inherited from caller.
932 */
933
1da177e4
LT		 934static inline void ata_pause(struct ata_port *ap)
935{
936 ata_altstatus(ap);
937 ndelay(400);
938}
939
0baab86b
EF		 940
941/**
942 * ata_busy_wait - Wait for a port status register
943 * @ap: Port to wait for.
944 *
945 * Waits up to max*10 microseconds for the selected bits in the port's
946 * status register to be cleared.
947 * Returns final value of status register.
948 *
949 * LOCKING:
950 * Inherited from caller.
951 */
952
1da177e4
LT		 953static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
954 unsigned int max)
955{
956 u8 status;
957
958 do {
959 udelay(10);
960 status = ata_chk_status(ap);
961 max--;
962 } while ((status & bits) && (max > 0));
963
964 return status;
965}
966
0baab86b
EF		 967
968/**
969 * ata_wait_idle - Wait for a port to be idle.
970 * @ap: Port to wait for.
971 *
972 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
973 * Returns final value of status register.
974 *
975 * LOCKING:
976 * Inherited from caller.
977 */
978
1da177e4
LT		 979static inline u8 ata_wait_idle(struct ata_port *ap)
980{
981 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
982
983 if (status & (ATA_BUSY | ATA_DRQ)) {
984 unsigned long l = ap->ioaddr.status_addr;
bfd60579
RD		 985 if (ata_msg_warn(ap))
986 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
987 status, l);
1da177e4
LT		 988 }
989
990 return status;
991}
992
993static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
994{
995 qc->tf.ctl |= ATA_NIEN;
996}
997
f69499f4
TH		 998static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
999 unsigned int tag)
1da177e4
LT		 1000{
1001 if (likely(ata_tag_valid(tag)))
1002 return &ap->qcmd[tag];
1003 return NULL;
1004}
1005
f69499f4
TH		 1006static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1007 unsigned int tag)
1008{
1009 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1010
1011 if (unlikely(!qc) || !ap->ops->error_handler)
1012 return qc;
1013
1014 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1015 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1016 return qc;
1017
1018 return NULL;
1019}
1020
3373efd8 1021static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1022{
1023 memset(tf, 0, sizeof(*tf));
1024
3373efd8
TH		 1025 tf->ctl = dev->ap->ctl;
1026 if (dev->devno == 0)
1da177e4
LT		 1027 tf->device = ATA_DEVICE_OBS;
1028 else
1029 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1030}
1031
2c13b7ce
JG		 1032static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1033{
1034 qc->__sg = NULL;
1035 qc->flags = 0;
1036 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1037 qc->nsect = 0;
1038 qc->nbytes = qc->curbytes = 0;
a22e2eb0 1039 qc->err_mask = 0;
2c13b7ce 1040
3373efd8 1041 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1042
1043 /* init result_tf such that it indicates normal completion */
1044 qc->result_tf.command = ATA_DRDY;
1045 qc->result_tf.feature = 0;
2c13b7ce
JG		 1046}
1047
0baab86b
EF		 1048/**
1049 * ata_irq_on - Enable interrupts on a port.
1050 * @ap: Port on which interrupts are enabled.
1051 *
1052 * Enable interrupts on a legacy IDE device using MMIO or PIO,
1053 * wait for idle, clear any pending interrupts.
1054 *
1055 * LOCKING:
1056 * Inherited from caller.
1057 */
1058
1da177e4
LT		 1059static inline u8 ata_irq_on(struct ata_port *ap)
1060{
1061 struct ata_ioports *ioaddr = &ap->ioaddr;
1062 u8 tmp;
1063
1064 ap->ctl &= ~ATA_NIEN;
1065 ap->last_ctl = ap->ctl;
1066
1067 if (ap->flags & ATA_FLAG_MMIO)
1068 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
1069 else
1070 outb(ap->ctl, ioaddr->ctl_addr);
1071 tmp = ata_wait_idle(ap);
1072
1073 ap->ops->irq_clear(ap);
1074
1075 return tmp;
1076}
1077
0baab86b
EF		 1078
1079/**
1080 * ata_irq_ack - Acknowledge a device interrupt.
1081 * @ap: Port on which interrupts are enabled.
1082 *
1083 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1084 * or BUSY+DRQ clear). Obtain dma status and port status from
1085 * device. Clear the interrupt. Return port status.
1086 *
1087 * LOCKING:
1088 */
1089
1da177e4
LT		 1090static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1091{
1092 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1093 u8 host_stat, post_stat, status;
1094
1095 status = ata_busy_wait(ap, bits, 1000);
1096 if (status & bits)
bfd60579
RD		 1097 if (ata_msg_err(ap))
1098 printk(KERN_ERR "abnormal status 0x%X\n", status);
1da177e4
LT		 1099
1100 /* get controller status; clear intr, err bits */
1101 if (ap->flags & ATA_FLAG_MMIO) {
1102 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1103 host_stat = readb(mmio + ATA_DMA_STATUS);
1104 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1105 mmio + ATA_DMA_STATUS);
1106
1107 post_stat = readb(mmio + ATA_DMA_STATUS);
1108 } else {
1109 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1110 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1111 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1112
1113 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1114 }
1115
bfd60579
RD		 1116 if (ata_msg_intr(ap))
1117 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1118 __FUNCTION__,
1119 host_stat, post_stat, status);
1da177e4
LT		 1120
1121 return status;
1122}
1123
057ace5e 1124static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1125{
1126 return ata_id_wcache_enabled(dev->id) ||
1127 ata_id_has_flush(dev->id) ||
1128 ata_id_has_flush_ext(dev->id);
1129}
1130
a7dac447
JG		 1131static inline unsigned int ac_err_mask(u8 status)
1132{
3655d1d3 1133 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1134 return AC_ERR_HSM;
a7dac447
JG		 1135 if (status & (ATA_ERR | ATA_DF))
1136 return AC_ERR_DEV;
1137 return 0;
1138}
1139
1140static inline unsigned int __ac_err_mask(u8 status)
1141{
1142 unsigned int mask = ac_err_mask(status);
1143 if (mask == 0)
1144 return AC_ERR_OTHER;
1145 return mask;
1146}
1147
6037d6bb
JG		 1148static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1149{
1150 ap->pad_dma = 0;
1151 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1152 &ap->pad_dma, GFP_KERNEL);
1153 return (ap->pad == NULL) ? -ENOMEM : 0;
1154}
1155
1156static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1157{
1158 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1159}
1160
35bb94b1
JG		 1161static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1162{
1163 return (struct ata_port *) &host->hostdata[0];
1164}
1165
1da177e4 1166#endif /* __LINUX_LIBATA_H__ */
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