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[PATCH] libata-hp-prep: make probing related functions global
[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>
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,
252
f3e81b19 253 /* ata_eh_info->flags */
abdda733
TH		 254 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
255
256 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
f3e81b19 257
ad9e2762
TH		 258 /* max repeat if error condition is still set after ->error_handler */
259 ATA_EH_MAX_REPEAT = 5,
260
14d2bac1
TH		 261 /* how hard are we gonna try to probe/recover devices */
262 ATA_PROBE_MAX_TRIES = 3,
022bdb07
TH		 263 ATA_EH_RESET_TRIES = 3,
264 ATA_EH_DEV_TRIES = 3,
1da177e4
LT		 265};
266
14be71f4 267enum hsm_task_states {
c56b14d2
AL		 268 HSM_ST_UNKNOWN, /* state unknown */
269 HSM_ST_IDLE, /* no command on going */
c56b14d2
AL		 270 HSM_ST, /* (waiting the device to) transfer data */
271 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2
AL		 272 HSM_ST_ERR, /* error */
273 HSM_ST_FIRST, /* (waiting the device to)
274 write CDB or first data block */
1da177e4
LT		 275};
276
a7dac447 277enum ata_completion_errors {
11a56d24
TH		 278 AC_ERR_DEV = (1 << 0), /* device reported error */
279 AC_ERR_HSM = (1 << 1), /* host state machine violation */
280 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
281 AC_ERR_MEDIA = (1 << 3), /* media error */
282 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
283 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
284 AC_ERR_SYSTEM = (1 << 6), /* system error */
285 AC_ERR_INVALID = (1 << 7), /* invalid argument */
286 AC_ERR_OTHER = (1 << 8), /* unknown */
a7dac447
JG		 287};
288
1da177e4
LT		 289/* forward declarations */
290struct scsi_device;
291struct ata_port_operations;
292struct ata_port;
293struct ata_queued_cmd;
294
295/* typedefs */
77853bf2 296typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
7944ea95 297typedef void (*ata_probeinit_fn_t)(struct ata_port *);
2bf2cb26 298typedef int (*ata_reset_fn_t)(struct ata_port *, unsigned int *);
a62c0fc5 299typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *);
1da177e4
LT		 300
301struct ata_ioports {
302 unsigned long cmd_addr;
303 unsigned long data_addr;
304 unsigned long error_addr;
305 unsigned long feature_addr;
306 unsigned long nsect_addr;
307 unsigned long lbal_addr;
308 unsigned long lbam_addr;
309 unsigned long lbah_addr;
310 unsigned long device_addr;
311 unsigned long status_addr;
312 unsigned long command_addr;
313 unsigned long altstatus_addr;
314 unsigned long ctl_addr;
315 unsigned long bmdma_addr;
316 unsigned long scr_addr;
317};
318
319struct ata_probe_ent {
320 struct list_head node;
321 struct device *dev;
057ace5e 322 const struct ata_port_operations *port_ops;
193515d5 323 struct scsi_host_template *sht;
1da177e4
LT		 324 struct ata_ioports port[ATA_MAX_PORTS];
325 unsigned int n_ports;
326 unsigned int hard_port_no;
327 unsigned int pio_mask;
328 unsigned int mwdma_mask;
329 unsigned int udma_mask;
330 unsigned int legacy_mode;
331 unsigned long irq;
332 unsigned int irq_flags;
333 unsigned long host_flags;
4e5ec5db 334 unsigned long host_set_flags;
1da177e4
LT		 335 void __iomem *mmio_base;
336 void *private_data;
337};
338
339struct ata_host_set {
340 spinlock_t lock;
341 struct device *dev;
342 unsigned long irq;
343 void __iomem *mmio_base;
344 unsigned int n_ports;
345 void *private_data;
057ace5e 346 const struct ata_port_operations *ops;
5444a6f4
AC		 347 unsigned long flags;
348 int simplex_claimed; /* Keep seperate in case we
349 ever need to do this locked */
1da177e4
LT		 350 struct ata_port * ports[0];
351};
352
353struct ata_queued_cmd {
354 struct ata_port *ap;
355 struct ata_device *dev;
356
357 struct scsi_cmnd *scsicmd;
358 void (*scsidone)(struct scsi_cmnd *);
359
360 struct ata_taskfile tf;
361 u8 cdb[ATAPI_CDB_LEN];
362
363 unsigned long flags; /* ATA_QCFLAG_xxx */
364 unsigned int tag;
365 unsigned int n_elem;
cedc9a47 366 unsigned int orig_n_elem;
1da177e4
LT		 367
368 int dma_dir;
369
cedc9a47
JG		 370 unsigned int pad_len;
371
1da177e4
LT		 372 unsigned int nsect;
373 unsigned int cursect;
374
375 unsigned int nbytes;
376 unsigned int curbytes;
377
378 unsigned int cursg;
379 unsigned int cursg_ofs;
380
381 struct scatterlist sgent;
cedc9a47 382 struct scatterlist pad_sgent;
1da177e4
LT		 383 void *buf_virt;
384
cedc9a47
JG		 385 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
386 struct scatterlist *__sg;
1da177e4 387
a22e2eb0 388 unsigned int err_mask;
e61e0672 389 struct ata_taskfile result_tf;
1da177e4
LT		 390 ata_qc_cb_t complete_fn;
391
1da177e4
LT		 392 void *private_data;
393};
394
395struct ata_host_stats {
396 unsigned long unhandled_irq;
397 unsigned long idle_irq;
398 unsigned long rw_reqbuf;
399};
400
0c247c55
TH		 401struct ata_ering_entry {
402 int is_io;
403 unsigned int err_mask;
404 u64 timestamp;
405};
406
407struct ata_ering {
408 int cursor;
409 struct ata_ering_entry ring[ATA_ERING_SIZE];
410};
411
1da177e4 412struct ata_device {
38d87234 413 struct ata_port *ap;
72fa4b74 414 unsigned int devno; /* 0 or 1 */
1da177e4 415 unsigned long flags; /* ATA_DFLAG_xxx */
3edebac4 416 struct scsi_device *sdev; /* attached SCSI device */
72fa4b74
TH		 417 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
418 u64 n_sectors; /* size of device, if ATA */
1da177e4 419 unsigned int class; /* ATA_DEV_xxx */
fe635c7e 420 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
1da177e4
LT		 421 u8 pio_mode;
422 u8 dma_mode;
423 u8 xfer_mode;
424 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
425
8cbd6df1
AL		 426 unsigned int multi_count; /* sectors count for
427 READ/WRITE MULTIPLE */
b00eec1d 428 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 429 unsigned int cdb_len;
8bf62ece 430
acf356b1
TH		 431 /* per-dev xfer mask */
432 unsigned int pio_mask;
433 unsigned int mwdma_mask;
434 unsigned int udma_mask;
435
8bf62ece
AL		 436 /* for CHS addressing */
437 u16 cylinders; /* Number of cylinders */
438 u16 heads; /* Number of heads */
439 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 440
441 /* error history */
442 struct ata_ering ering;
1da177e4
LT		 443};
444
72fa4b74
TH		 445/* Offset into struct ata_device. Fields above it are maintained
446 * acress device init. Fields below are zeroed.
447 */
448#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
449
f3e81b19
TH		 450struct ata_eh_info {
451 struct ata_device *dev; /* offending device */
452 u32 serror; /* SError from LLDD */
453 unsigned int err_mask; /* port-wide err_mask */
454 unsigned int action; /* ATA_EH_* action mask */
455 unsigned int flags; /* ATA_EHI_* flags */
abdda733
TH		 456
457 unsigned long hotplug_timestamp;
458 unsigned int probe_mask;
459
f3e81b19
TH		 460 char desc[ATA_EH_DESC_LEN];
461 int desc_len;
462};
463
464struct ata_eh_context {
465 struct ata_eh_info i;
466 int tries[ATA_MAX_DEVICES];
abdda733
TH		 467 unsigned int classes[ATA_MAX_DEVICES];
468 unsigned int did_probe_mask;
f3e81b19
TH		 469};
470
1da177e4
LT		 471struct ata_port {
472 struct Scsi_Host *host; /* our co-allocated scsi host */
057ace5e 473 const struct ata_port_operations *ops;
1da177e4
LT		 474 unsigned long flags; /* ATA_FLAG_xxx */
475 unsigned int id; /* unique id req'd by scsi midlyr */
476 unsigned int port_no; /* unique port #; from zero */
477 unsigned int hard_port_no; /* hardware port #; from zero */
478
479 struct ata_prd *prd; /* our SG list */
480 dma_addr_t prd_dma; /* and its DMA mapping */
481
cedc9a47
JG		 482 void *pad; /* array of DMA pad buffers */
483 dma_addr_t pad_dma;
484
1da177e4
LT		 485 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
486
487 u8 ctl; /* cache of ATA control register */
488 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 489 unsigned int pio_mask;
490 unsigned int mwdma_mask;
491 unsigned int udma_mask;
492 unsigned int cbl; /* cable type; ATA_CBL_xxx */
5a04bf4b 493 unsigned int hw_sata_spd_limit;
1c3fae4d 494 unsigned int sata_spd_limit; /* SATA PHY speed limit */
1da177e4 495
f3e81b19
TH		 496 /* record runtime error info, protected by host_set lock */
497 struct ata_eh_info eh_info;
498 /* EH context owned by EH */
499 struct ata_eh_context eh_context;
500
1da177e4
LT		 501 struct ata_device device[ATA_MAX_DEVICES];
502
503 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 504 unsigned long qc_allocated;
dedaf2b0
TH		 505 unsigned int qc_active;
506
1da177e4 507 unsigned int active_tag;
dedaf2b0 508 u32 sactive;
1da177e4
LT		 509
510 struct ata_host_stats stats;
511 struct ata_host_set *host_set;
2f1f610b 512 struct device *dev;
1da177e4 513
86e45b6b
TH		 514 struct work_struct port_task;
515
14be71f4 516 unsigned int hsm_task_state;
1da177e4 517
bfd60579 518 u32 msg_enable;
a72ec4ce 519 struct list_head eh_done_q;
c6cf9e99 520 wait_queue_head_t eh_wait_q;
bfd60579 521
1da177e4 522 void *private_data;
fe635c7e
TH		 523
524 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 525};
526
527struct ata_port_operations {
528 void (*port_disable) (struct ata_port *);
529
530 void (*dev_config) (struct ata_port *, struct ata_device *);
531
532 void (*set_piomode) (struct ata_port *, struct ata_device *);
533 void (*set_dmamode) (struct ata_port *, struct ata_device *);
5444a6f4 534 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
1da177e4 535
057ace5e 536 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 537 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
538
057ace5e 539 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 540 u8 (*check_status)(struct ata_port *ap);
541 u8 (*check_altstatus)(struct ata_port *ap);
1da177e4
LT		 542 void (*dev_select)(struct ata_port *ap, unsigned int device);
543
c19ba8af 544 void (*phy_reset) (struct ata_port *ap); /* obsolete */
e35a9e01 545 void (*set_mode) (struct ata_port *ap);
c19ba8af
TH		 546 int (*probe_reset) (struct ata_port *ap, unsigned int *classes);
547
1da177e4
LT		 548 void (*post_set_mode) (struct ata_port *ap);
549
550 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
551
552 void (*bmdma_setup) (struct ata_queued_cmd *qc);
553 void (*bmdma_start) (struct ata_queued_cmd *qc);
554
a6b2c5d4
AC		 555 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
556
1da177e4 557 void (*qc_prep) (struct ata_queued_cmd *qc);
9a3d9eb0 558 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
1da177e4 559
9ec957f2
TH		 560 /* Error handlers. ->error_handler overrides ->eng_timeout and
561 * indicates that new-style EH is in place.
562 */
563 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
564
565 void (*freeze) (struct ata_port *ap);
566 void (*thaw) (struct ata_port *ap);
567 void (*error_handler) (struct ata_port *ap);
568 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
1da177e4
LT		 569
570 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
571 void (*irq_clear) (struct ata_port *);
572
573 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
574 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
575 u32 val);
576
577 int (*port_start) (struct ata_port *ap);
578 void (*port_stop) (struct ata_port *ap);
579
580 void (*host_stop) (struct ata_host_set *host_set);
581
b73fc89f 582 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 583 u8 (*bmdma_status) (struct ata_port *ap);
584};
585
586struct ata_port_info {
d0be4a7d 587 struct scsi_host_template *sht;
1da177e4
LT		 588 unsigned long host_flags;
589 unsigned long pio_mask;
590 unsigned long mwdma_mask;
591 unsigned long udma_mask;
057ace5e 592 const struct ata_port_operations *port_ops;
e99f8b5e 593 void *private_data;
1da177e4
LT		 594};
595
452503f9
AC		 596struct ata_timing {
597 unsigned short mode; /* ATA mode */
598 unsigned short setup; /* t1 */
599 unsigned short act8b; /* t2 for 8-bit I/O */
600 unsigned short rec8b; /* t2i for 8-bit I/O */
601 unsigned short cyc8b; /* t0 for 8-bit I/O */
602 unsigned short active; /* t2 or tD */
603 unsigned short recover; /* t2i or tK */
604 unsigned short cycle; /* t0 */
605 unsigned short udma; /* t2CYCTYP/2 */
606};
607
608#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
1da177e4
LT		 609
610extern void ata_port_probe(struct ata_port *);
611extern void __sata_phy_reset(struct ata_port *ap);
612extern void sata_phy_reset(struct ata_port *ap);
613extern void ata_bus_reset(struct ata_port *ap);
3c567b7d 614extern int sata_set_spd(struct ata_port *ap);
a62c0fc5 615extern int ata_drive_probe_reset(struct ata_port *ap,
7944ea95 616 ata_probeinit_fn_t probeinit,
a62c0fc5
TH		 617 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
618 ata_postreset_fn_t postreset, unsigned int *classes);
8a19ac89 619extern void ata_std_probeinit(struct ata_port *ap);
2bf2cb26
TH		 620extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
621extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
c2bd5804 622extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
3373efd8 623extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
1da177e4
LT		 624extern void ata_port_disable(struct ata_port *);
625extern void ata_std_ports(struct ata_ioports *ioaddr);
626#ifdef CONFIG_PCI
627extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
628 unsigned int n_ports);
629extern void ata_pci_remove_one (struct pci_dev *pdev);
9b847548
JA		 630extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
631extern int ata_pci_device_resume(struct pci_dev *pdev);
17bb34a3 632extern int ata_pci_clear_simplex(struct pci_dev *pdev);
1da177e4 633#endif /* CONFIG_PCI */
057ace5e 634extern int ata_device_add(const struct ata_probe_ent *ent);
17b14451 635extern void ata_host_set_remove(struct ata_host_set *host_set);
193515d5 636extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 637extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
638extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
1da177e4
LT		 639extern int ata_scsi_release(struct Scsi_Host *host);
640extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
34bf2170
TH		 641extern int sata_scr_valid(struct ata_port *ap);
642extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
643extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
644extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
645extern int ata_port_online(struct ata_port *ap);
646extern int ata_port_offline(struct ata_port *ap);
9b847548 647extern int ata_scsi_device_resume(struct scsi_device *);
082776e4 648extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state);
3373efd8
TH		 649extern int ata_device_resume(struct ata_device *);
650extern int ata_device_suspend(struct ata_device *, pm_message_t state);
67846b30 651extern int ata_ratelimit(void);
6f8b9958
TH		 652extern unsigned int ata_busy_sleep(struct ata_port *ap,
653 unsigned long timeout_pat,
654 unsigned long timeout);
86e45b6b
TH		 655extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
656 void *data, unsigned long delay);
c22daff4
TH		 657extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
658 unsigned long interval_msec,
659 unsigned long timeout_msec);
67846b30 660
1da177e4
LT		 661/*
662 * Default driver ops implementations
663 */
057ace5e 664extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 665extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
057ace5e
JG		 666extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
667extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1da177e4
LT		 668extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
669extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
670extern u8 ata_check_status(struct ata_port *ap);
671extern u8 ata_altstatus(struct ata_port *ap);
057ace5e 672extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
c2bd5804 673extern int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes);
1da177e4
LT		 674extern int ata_port_start (struct ata_port *ap);
675extern void ata_port_stop (struct ata_port *ap);
aa8f0dc6 676extern void ata_host_stop (struct ata_host_set *host_set);
1da177e4 677extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
a6b2c5d4
AC		 678extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
679 unsigned int buflen, int write_data);
680extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
681 unsigned int buflen, int write_data);
75e99585
AC		 682extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
683 unsigned int buflen, int write_data);
1da177e4 684extern void ata_qc_prep(struct ata_queued_cmd *qc);
e46834cd 685extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
9a3d9eb0 686extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
1da177e4
LT		 687extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
688 unsigned int buflen);
689extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
690 unsigned int n_elem);
057ace5e 691extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
6a62a04d
TH		 692extern void ata_id_string(const u16 *id, unsigned char *s,
693 unsigned int ofs, unsigned int len);
694extern void ata_id_c_string(const u16 *id, unsigned char *s,
695 unsigned int ofs, unsigned int len);
1da177e4
LT		 696extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
697extern void ata_bmdma_start (struct ata_queued_cmd *qc);
b73fc89f 698extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 699extern u8 ata_bmdma_status(struct ata_port *ap);
700extern void ata_bmdma_irq_clear(struct ata_port *ap);
6d97dbd7
TH		 701extern void ata_bmdma_freeze(struct ata_port *ap);
702extern void ata_bmdma_thaw(struct ata_port *ap);
703extern void ata_bmdma_drive_eh(struct ata_port *ap,
704 ata_reset_fn_t softreset,
705 ata_reset_fn_t hardreset,
706 ata_postreset_fn_t postreset);
707extern void ata_bmdma_error_handler(struct ata_port *ap);
708extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
f686bcb8 709extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 710extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
711 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 712extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 713 void (*done)(struct scsi_cmnd *));
714extern int ata_std_bios_param(struct scsi_device *sdev,
715 struct block_device *bdev,
716 sector_t capacity, int geom[]);
717extern int ata_scsi_slave_config(struct scsi_device *sdev);
a6e6ce8e
TH		 718extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
719 int queue_depth);
3373efd8 720extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1da177e4 721
452503f9
AC		 722/*
723 * Timing helpers
724 */
1bc4ccff
AC		 725
726extern unsigned int ata_pio_need_iordy(const struct ata_device *);
452503f9
AC		 727extern int ata_timing_compute(struct ata_device *, unsigned short,
728 struct ata_timing *, int, int);
729extern void ata_timing_merge(const struct ata_timing *,
730 const struct ata_timing *, struct ata_timing *,
731 unsigned int);
732
733enum {
734 ATA_TIMING_SETUP = (1 << 0),
735 ATA_TIMING_ACT8B = (1 << 1),
736 ATA_TIMING_REC8B = (1 << 2),
737 ATA_TIMING_CYC8B = (1 << 3),
738 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
739 ATA_TIMING_CYC8B,
740 ATA_TIMING_ACTIVE = (1 << 4),
741 ATA_TIMING_RECOVER = (1 << 5),
742 ATA_TIMING_CYCLE = (1 << 6),
743 ATA_TIMING_UDMA = (1 << 7),
744 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
745 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
746 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
747 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
748};
749
1da177e4
LT		 750
751#ifdef CONFIG_PCI
752struct pci_bits {
753 unsigned int reg; /* PCI config register to read */
754 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
755 unsigned long mask;
756 unsigned long val;
757};
758
374b1873 759extern void ata_pci_host_stop (struct ata_host_set *host_set);
1da177e4 760extern struct ata_probe_ent *
47a86593 761ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
057ace5e 762extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
17bb34a3 763extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
1da177e4
LT		 764#endif /* CONFIG_PCI */
765
ece1d636
TH		 766/*
767 * EH
768 */
ece1d636 769extern void ata_eng_timeout(struct ata_port *ap);
7b70fc03
TH		 770
771extern void ata_port_schedule_eh(struct ata_port *ap);
772extern int ata_port_abort(struct ata_port *ap);
e3180499
TH		 773extern int ata_port_freeze(struct ata_port *ap);
774
775extern void ata_eh_freeze_port(struct ata_port *ap);
776extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 777
ece1d636
TH		 778extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
779extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
780
022bdb07
TH		 781extern void ata_do_eh(struct ata_port *ap, ata_reset_fn_t softreset,
782 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
783
61440db6
TH		 784/*
785 * printk helpers
786 */
787#define ata_port_printk(ap, lv, fmt, args...) \
788 printk(lv"ata%u: "fmt, (ap)->id , ##args)
789
790#define ata_dev_printk(dev, lv, fmt, args...) \
791 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
1da177e4 792
f3e81b19
TH		 793/*
794 * ata_eh_info helpers
795 */
796#define ata_ehi_push_desc(ehi, fmt, args...) do { \
797 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
798 ATA_EH_DESC_LEN - (ehi)->desc_len, \
799 fmt , ##args); \
800} while (0)
801
802#define ata_ehi_clear_desc(ehi) do { \
803 (ehi)->desc[0] = '\0'; \
804 (ehi)->desc_len = 0; \
805} while (0)
806
61440db6
TH		 807/*
808 * qc helpers
809 */
972c26bd
JG		 810static inline int
811ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
812{
813 if (sg == &qc->pad_sgent)
814 return 1;
815 if (qc->pad_len)
816 return 0;
817 if (((sg - qc->__sg) + 1) == qc->n_elem)
818 return 1;
819 return 0;
820}
821
cc1887f3
TH		 822static inline struct scatterlist *
823ata_qc_first_sg(struct ata_queued_cmd *qc)
824{
825 if (qc->n_elem)
826 return qc->__sg;
827 if (qc->pad_len)
828 return &qc->pad_sgent;
829 return NULL;
830}
831
cedc9a47
JG		 832static inline struct scatterlist *
833ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
834{
835 if (sg == &qc->pad_sgent)
836 return NULL;
837 if (++sg - qc->__sg < qc->n_elem)
838 return sg;
cc1887f3
TH		 839 if (qc->pad_len)
840 return &qc->pad_sgent;
841 return NULL;
cedc9a47
JG		 842}
843
844#define ata_for_each_sg(sg, qc) \
cc1887f3 845 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
cedc9a47 846
1da177e4
LT		 847static inline unsigned int ata_tag_valid(unsigned int tag)
848{
849 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
850}
851
2ab7db1f
TH		 852static inline unsigned int ata_tag_internal(unsigned int tag)
853{
854 return tag == ATA_MAX_QUEUE - 1;
855}
856
e1211e3f 857static inline unsigned int ata_class_enabled(unsigned int class)
597afd21
TH		 858{
859 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
860}
861
e1211e3f 862static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 863{
e1211e3f
TH		 864 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
865}
866
002c8054
TH		 867static inline unsigned int ata_class_absent(unsigned int class)
868{
869 return !ata_class_enabled(class) && !ata_class_disabled(class);
870}
871
e1211e3f
TH		 872static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
873{
874 return ata_class_enabled(dev->class);
875}
876
877static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
878{
879 return ata_class_disabled(dev->class);
1da177e4
LT		 880}
881
002c8054
TH		 882static inline unsigned int ata_dev_absent(const struct ata_device *dev)
883{
884 return ata_class_absent(dev->class);
885}
886
1da177e4
LT		 887static inline u8 ata_chk_status(struct ata_port *ap)
888{
889 return ap->ops->check_status(ap);
890}
891
0baab86b
EF		 892
893/**
894 * ata_pause - Flush writes and pause 400 nanoseconds.
895 * @ap: Port to wait for.
896 *
897 * LOCKING:
898 * Inherited from caller.
899 */
900
1da177e4
LT		 901static inline void ata_pause(struct ata_port *ap)
902{
903 ata_altstatus(ap);
904 ndelay(400);
905}
906
0baab86b
EF		 907
908/**
909 * ata_busy_wait - Wait for a port status register
910 * @ap: Port to wait for.
911 *
912 * Waits up to max*10 microseconds for the selected bits in the port's
913 * status register to be cleared.
914 * Returns final value of status register.
915 *
916 * LOCKING:
917 * Inherited from caller.
918 */
919
1da177e4
LT		 920static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
921 unsigned int max)
922{
923 u8 status;
924
925 do {
926 udelay(10);
927 status = ata_chk_status(ap);
928 max--;
929 } while ((status & bits) && (max > 0));
930
931 return status;
932}
933
0baab86b
EF		 934
935/**
936 * ata_wait_idle - Wait for a port to be idle.
937 * @ap: Port to wait for.
938 *
939 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
940 * Returns final value of status register.
941 *
942 * LOCKING:
943 * Inherited from caller.
944 */
945
1da177e4
LT		 946static inline u8 ata_wait_idle(struct ata_port *ap)
947{
948 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
949
950 if (status & (ATA_BUSY | ATA_DRQ)) {
951 unsigned long l = ap->ioaddr.status_addr;
bfd60579
RD		 952 if (ata_msg_warn(ap))
953 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
954 status, l);
1da177e4
LT		 955 }
956
957 return status;
958}
959
960static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
961{
962 qc->tf.ctl |= ATA_NIEN;
963}
964
f69499f4
TH		 965static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
966 unsigned int tag)
1da177e4
LT		 967{
968 if (likely(ata_tag_valid(tag)))
969 return &ap->qcmd[tag];
970 return NULL;
971}
972
f69499f4
TH		 973static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
974 unsigned int tag)
975{
976 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
977
978 if (unlikely(!qc) || !ap->ops->error_handler)
979 return qc;
980
981 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
982 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
983 return qc;
984
985 return NULL;
986}
987
3373efd8 988static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 989{
990 memset(tf, 0, sizeof(*tf));
991
3373efd8
TH		 992 tf->ctl = dev->ap->ctl;
993 if (dev->devno == 0)
1da177e4
LT		 994 tf->device = ATA_DEVICE_OBS;
995 else
996 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
997}
998
2c13b7ce
JG		 999static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1000{
1001 qc->__sg = NULL;
1002 qc->flags = 0;
1003 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1004 qc->nsect = 0;
1005 qc->nbytes = qc->curbytes = 0;
a22e2eb0 1006 qc->err_mask = 0;
2c13b7ce 1007
3373efd8 1008 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1009
1010 /* init result_tf such that it indicates normal completion */
1011 qc->result_tf.command = ATA_DRDY;
1012 qc->result_tf.feature = 0;
2c13b7ce
JG		 1013}
1014
0baab86b
EF		 1015/**
1016 * ata_irq_on - Enable interrupts on a port.
1017 * @ap: Port on which interrupts are enabled.
1018 *
1019 * Enable interrupts on a legacy IDE device using MMIO or PIO,
1020 * wait for idle, clear any pending interrupts.
1021 *
1022 * LOCKING:
1023 * Inherited from caller.
1024 */
1025
1da177e4
LT		 1026static inline u8 ata_irq_on(struct ata_port *ap)
1027{
1028 struct ata_ioports *ioaddr = &ap->ioaddr;
1029 u8 tmp;
1030
1031 ap->ctl &= ~ATA_NIEN;
1032 ap->last_ctl = ap->ctl;
1033
1034 if (ap->flags & ATA_FLAG_MMIO)
1035 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
1036 else
1037 outb(ap->ctl, ioaddr->ctl_addr);
1038 tmp = ata_wait_idle(ap);
1039
1040 ap->ops->irq_clear(ap);
1041
1042 return tmp;
1043}
1044
0baab86b
EF		 1045
1046/**
1047 * ata_irq_ack - Acknowledge a device interrupt.
1048 * @ap: Port on which interrupts are enabled.
1049 *
1050 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1051 * or BUSY+DRQ clear). Obtain dma status and port status from
1052 * device. Clear the interrupt. Return port status.
1053 *
1054 * LOCKING:
1055 */
1056
1da177e4
LT		 1057static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1058{
1059 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1060 u8 host_stat, post_stat, status;
1061
1062 status = ata_busy_wait(ap, bits, 1000);
1063 if (status & bits)
bfd60579
RD		 1064 if (ata_msg_err(ap))
1065 printk(KERN_ERR "abnormal status 0x%X\n", status);
1da177e4
LT		 1066
1067 /* get controller status; clear intr, err bits */
1068 if (ap->flags & ATA_FLAG_MMIO) {
1069 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1070 host_stat = readb(mmio + ATA_DMA_STATUS);
1071 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1072 mmio + ATA_DMA_STATUS);
1073
1074 post_stat = readb(mmio + ATA_DMA_STATUS);
1075 } else {
1076 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1077 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1078 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1079
1080 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1081 }
1082
bfd60579
RD		 1083 if (ata_msg_intr(ap))
1084 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1085 __FUNCTION__,
1086 host_stat, post_stat, status);
1da177e4
LT		 1087
1088 return status;
1089}
1090
057ace5e 1091static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1092{
1093 return ata_id_wcache_enabled(dev->id) ||
1094 ata_id_has_flush(dev->id) ||
1095 ata_id_has_flush_ext(dev->id);
1096}
1097
a7dac447
JG		 1098static inline unsigned int ac_err_mask(u8 status)
1099{
3655d1d3 1100 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1101 return AC_ERR_HSM;
a7dac447
JG		 1102 if (status & (ATA_ERR | ATA_DF))
1103 return AC_ERR_DEV;
1104 return 0;
1105}
1106
1107static inline unsigned int __ac_err_mask(u8 status)
1108{
1109 unsigned int mask = ac_err_mask(status);
1110 if (mask == 0)
1111 return AC_ERR_OTHER;
1112 return mask;
1113}
1114
6037d6bb
JG		 1115static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1116{
1117 ap->pad_dma = 0;
1118 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1119 &ap->pad_dma, GFP_KERNEL);
1120 return (ap->pad == NULL) ? -ENOMEM : 0;
1121}
1122
1123static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1124{
1125 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1126}
1127
35bb94b1
JG		 1128static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1129{
1130 return (struct ata_port *) &host->hostdata[0];
1131}
1132
1da177e4 1133#endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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