]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - include/linux/libata.h
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] libata-ncq: rename ap->qactive to ap->qc_allocated
[mirror_ubuntu-artful-kernel.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
TH		 111 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
112 ATA_MAX_QUEUE = 2,
113 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
1da177e4
LT		 114 ATA_MAX_SECTORS = 200, /* FIXME */
115 ATA_MAX_BUS = 2,
116 ATA_DEF_BUSY_WAIT = 10000,
117 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
118
119 ATA_SHT_EMULATED = 1,
120 ATA_SHT_CMD_PER_LUN = 1,
121 ATA_SHT_THIS_ID = -1,
cf482935 122 ATA_SHT_USE_CLUSTERING = 1,
1da177e4
LT		 123
124 /* struct ata_device stuff */
949b38af
TH		 125 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
126 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
029f5468 127 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
88e49034 128 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
ea1dd4e1 129 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
949b38af
TH		 130
131 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */
1da177e4
LT		 132
133 ATA_DEV_UNKNOWN = 0, /* unknown device */
134 ATA_DEV_ATA = 1, /* ATA device */
135 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
136 ATA_DEV_ATAPI = 3, /* ATAPI device */
137 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
138 ATA_DEV_NONE = 5, /* no device */
139
140 /* struct ata_port flags */
949b38af 141 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
1da177e4 142 /* (doesn't imply presence) */
949b38af
TH		 143 ATA_FLAG_SATA = (1 << 1),
144 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
145 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
146 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
147 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
148 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
149 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
150 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
151 ATA_FLAG_IRQ_MASK = (1 << 9), /* Mask IRQ in PIO xfers */
029f5468
JG		 152 ATA_FLAG_PIO_POLLING = (1 << 10), /* use polling PIO if LLD
153 * doesn't handle PIO interrupts */
88e49034 154 ATA_FLAG_NCQ = (1 << 11), /* host supports NCQ */
949b38af 155
9ec957f2
TH		 156 ATA_FLAG_DEBUGMSG = (1 << 14),
157 ATA_FLAG_FLUSH_PORT_TASK = (1 << 15), /* flush port task */
949b38af 158
9ec957f2
TH		 159 ATA_FLAG_EH_PENDING = (1 << 16), /* EH pending */
160 ATA_FLAG_FROZEN = (1 << 17), /* port is frozen */
9be1e979 161 ATA_FLAG_RECOVERED = (1 << 18), /* recovery action performed */
9ec957f2
TH		 162
163 ATA_FLAG_DISABLED = (1 << 22), /* port is disabled, ignore it */
164 ATA_FLAG_SUSPENDED = (1 << 23), /* port is suspended (power) */
949b38af
TH		 165
166 /* bits 24:31 of ap->flags are reserved for LLDD specific flags */
167
168 /* struct ata_queued_cmd flags */
169 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
170 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
171 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
1da177e4 172 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
27197367 173 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672
TH		 174 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
175
9ec957f2
TH		 176 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
177 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
178 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 179
4e5ec5db
AC		 180 /* host set flags */
181 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */
182
1da177e4 183 /* various lengths of time */
8d238e01
AC		 184 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
185 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
a2a7a662
TH		 186 ATA_TMOUT_INTERNAL = 30 * HZ,
187 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
1da177e4
LT		 188
189 /* ATA bus states */
190 BUS_UNKNOWN = 0,
191 BUS_DMA = 1,
192 BUS_IDLE = 2,
193 BUS_NOINTR = 3,
194 BUS_NODATA = 4,
195 BUS_TIMER = 5,
196 BUS_PIO = 6,
197 BUS_EDD = 7,
198 BUS_IDENTIFY = 8,
199 BUS_PACKET = 9,
200
201 /* SATA port states */
202 PORT_UNKNOWN = 0,
203 PORT_ENABLED = 1,
204 PORT_DISABLED = 2,
205
206 /* encoding various smaller bitmaps into a single
1da7b0d0 207 * unsigned int bitmap
1da177e4 208 */
1da7b0d0
TH		 209 ATA_BITS_PIO = 5,
210 ATA_BITS_MWDMA = 3,
211 ATA_BITS_UDMA = 8,
212
213 ATA_SHIFT_PIO = 0,
214 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
215 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
216
217 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
218 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
219 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
cedc9a47
JG		 220
221 /* size of buffer to pad xfers ending on unaligned boundaries */
222 ATA_DMA_PAD_SZ = 4,
223 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
949b38af
TH		 224
225 /* masks for port functions */
47a86593
AC		 226 ATA_PORT_PRIMARY = (1 << 0),
227 ATA_PORT_SECONDARY = (1 << 1),
14d2bac1 228
0c247c55
TH		 229 /* ering size */
230 ATA_ERING_SIZE = 32,
231
f3e81b19
TH		 232 /* desc_len for ata_eh_info and context */
233 ATA_EH_DESC_LEN = 80,
234
9be1e979
TH		 235 /* reset / recovery action types */
236 ATA_EH_REVALIDATE = (1 << 0),
237 ATA_EH_SOFTRESET = (1 << 1),
238 ATA_EH_HARDRESET = (1 << 2),
239
240 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
241
f3e81b19
TH		 242 /* ata_eh_info->flags */
243 ATA_EHI_DID_RESET = (1 << 0), /* already reset this port */
244
ad9e2762
TH		 245 /* max repeat if error condition is still set after ->error_handler */
246 ATA_EH_MAX_REPEAT = 5,
247
14d2bac1
TH		 248 /* how hard are we gonna try to probe/recover devices */
249 ATA_PROBE_MAX_TRIES = 3,
022bdb07
TH		 250 ATA_EH_RESET_TRIES = 3,
251 ATA_EH_DEV_TRIES = 3,
1da177e4
LT		 252};
253
14be71f4 254enum hsm_task_states {
c56b14d2
AL		 255 HSM_ST_UNKNOWN, /* state unknown */
256 HSM_ST_IDLE, /* no command on going */
c56b14d2
AL		 257 HSM_ST, /* (waiting the device to) transfer data */
258 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2
AL		 259 HSM_ST_ERR, /* error */
260 HSM_ST_FIRST, /* (waiting the device to)
261 write CDB or first data block */
1da177e4
LT		 262};
263
a7dac447 264enum ata_completion_errors {
11a56d24
TH		 265 AC_ERR_DEV = (1 << 0), /* device reported error */
266 AC_ERR_HSM = (1 << 1), /* host state machine violation */
267 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
268 AC_ERR_MEDIA = (1 << 3), /* media error */
269 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
270 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
271 AC_ERR_SYSTEM = (1 << 6), /* system error */
272 AC_ERR_INVALID = (1 << 7), /* invalid argument */
273 AC_ERR_OTHER = (1 << 8), /* unknown */
a7dac447
JG		 274};
275
1da177e4
LT		 276/* forward declarations */
277struct scsi_device;
278struct ata_port_operations;
279struct ata_port;
280struct ata_queued_cmd;
281
282/* typedefs */
77853bf2 283typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
7944ea95 284typedef void (*ata_probeinit_fn_t)(struct ata_port *);
2bf2cb26 285typedef int (*ata_reset_fn_t)(struct ata_port *, unsigned int *);
a62c0fc5 286typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *);
1da177e4
LT		 287
288struct ata_ioports {
289 unsigned long cmd_addr;
290 unsigned long data_addr;
291 unsigned long error_addr;
292 unsigned long feature_addr;
293 unsigned long nsect_addr;
294 unsigned long lbal_addr;
295 unsigned long lbam_addr;
296 unsigned long lbah_addr;
297 unsigned long device_addr;
298 unsigned long status_addr;
299 unsigned long command_addr;
300 unsigned long altstatus_addr;
301 unsigned long ctl_addr;
302 unsigned long bmdma_addr;
303 unsigned long scr_addr;
304};
305
306struct ata_probe_ent {
307 struct list_head node;
308 struct device *dev;
057ace5e 309 const struct ata_port_operations *port_ops;
193515d5 310 struct scsi_host_template *sht;
1da177e4
LT		 311 struct ata_ioports port[ATA_MAX_PORTS];
312 unsigned int n_ports;
313 unsigned int hard_port_no;
314 unsigned int pio_mask;
315 unsigned int mwdma_mask;
316 unsigned int udma_mask;
317 unsigned int legacy_mode;
318 unsigned long irq;
319 unsigned int irq_flags;
320 unsigned long host_flags;
4e5ec5db 321 unsigned long host_set_flags;
1da177e4
LT		 322 void __iomem *mmio_base;
323 void *private_data;
324};
325
326struct ata_host_set {
327 spinlock_t lock;
328 struct device *dev;
329 unsigned long irq;
330 void __iomem *mmio_base;
331 unsigned int n_ports;
332 void *private_data;
057ace5e 333 const struct ata_port_operations *ops;
5444a6f4
AC		 334 unsigned long flags;
335 int simplex_claimed; /* Keep seperate in case we
336 ever need to do this locked */
1da177e4
LT		 337 struct ata_port * ports[0];
338};
339
340struct ata_queued_cmd {
341 struct ata_port *ap;
342 struct ata_device *dev;
343
344 struct scsi_cmnd *scsicmd;
345 void (*scsidone)(struct scsi_cmnd *);
346
347 struct ata_taskfile tf;
348 u8 cdb[ATAPI_CDB_LEN];
349
350 unsigned long flags; /* ATA_QCFLAG_xxx */
351 unsigned int tag;
352 unsigned int n_elem;
cedc9a47 353 unsigned int orig_n_elem;
1da177e4
LT		 354
355 int dma_dir;
356
cedc9a47
JG		 357 unsigned int pad_len;
358
1da177e4
LT		 359 unsigned int nsect;
360 unsigned int cursect;
361
362 unsigned int nbytes;
363 unsigned int curbytes;
364
365 unsigned int cursg;
366 unsigned int cursg_ofs;
367
368 struct scatterlist sgent;
cedc9a47 369 struct scatterlist pad_sgent;
1da177e4
LT		 370 void *buf_virt;
371
cedc9a47
JG		 372 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
373 struct scatterlist *__sg;
1da177e4 374
a22e2eb0 375 unsigned int err_mask;
e61e0672 376 struct ata_taskfile result_tf;
1da177e4
LT		 377 ata_qc_cb_t complete_fn;
378
1da177e4
LT		 379 void *private_data;
380};
381
382struct ata_host_stats {
383 unsigned long unhandled_irq;
384 unsigned long idle_irq;
385 unsigned long rw_reqbuf;
386};
387
0c247c55
TH		 388struct ata_ering_entry {
389 int is_io;
390 unsigned int err_mask;
391 u64 timestamp;
392};
393
394struct ata_ering {
395 int cursor;
396 struct ata_ering_entry ring[ATA_ERING_SIZE];
397};
398
1da177e4 399struct ata_device {
38d87234 400 struct ata_port *ap;
1da177e4
LT		 401 u64 n_sectors; /* size of device, if ATA */
402 unsigned long flags; /* ATA_DFLAG_xxx */
403 unsigned int class; /* ATA_DEV_xxx */
404 unsigned int devno; /* 0 or 1 */
fe635c7e 405 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
1da177e4
LT		 406 u8 pio_mode;
407 u8 dma_mode;
408 u8 xfer_mode;
409 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
410
8cbd6df1
AL		 411 unsigned int multi_count; /* sectors count for
412 READ/WRITE MULTIPLE */
b00eec1d 413 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 414 unsigned int cdb_len;
8bf62ece 415
acf356b1
TH		 416 /* per-dev xfer mask */
417 unsigned int pio_mask;
418 unsigned int mwdma_mask;
419 unsigned int udma_mask;
420
8bf62ece
AL		 421 /* for CHS addressing */
422 u16 cylinders; /* Number of cylinders */
423 u16 heads; /* Number of heads */
424 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 425
426 /* error history */
427 struct ata_ering ering;
1da177e4
LT		 428};
429
f3e81b19
TH		 430struct ata_eh_info {
431 struct ata_device *dev; /* offending device */
432 u32 serror; /* SError from LLDD */
433 unsigned int err_mask; /* port-wide err_mask */
434 unsigned int action; /* ATA_EH_* action mask */
435 unsigned int flags; /* ATA_EHI_* flags */
436 char desc[ATA_EH_DESC_LEN];
437 int desc_len;
438};
439
440struct ata_eh_context {
441 struct ata_eh_info i;
442 int tries[ATA_MAX_DEVICES];
443};
444
1da177e4
LT		 445struct ata_port {
446 struct Scsi_Host *host; /* our co-allocated scsi host */
057ace5e 447 const struct ata_port_operations *ops;
1da177e4
LT		 448 unsigned long flags; /* ATA_FLAG_xxx */
449 unsigned int id; /* unique id req'd by scsi midlyr */
450 unsigned int port_no; /* unique port #; from zero */
451 unsigned int hard_port_no; /* hardware port #; from zero */
452
453 struct ata_prd *prd; /* our SG list */
454 dma_addr_t prd_dma; /* and its DMA mapping */
455
cedc9a47
JG		 456 void *pad; /* array of DMA pad buffers */
457 dma_addr_t pad_dma;
458
1da177e4
LT		 459 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
460
461 u8 ctl; /* cache of ATA control register */
462 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 463 unsigned int pio_mask;
464 unsigned int mwdma_mask;
465 unsigned int udma_mask;
466 unsigned int cbl; /* cable type; ATA_CBL_xxx */
1c3fae4d 467 unsigned int sata_spd_limit; /* SATA PHY speed limit */
1da177e4 468
f3e81b19
TH		 469 /* record runtime error info, protected by host_set lock */
470 struct ata_eh_info eh_info;
471 /* EH context owned by EH */
472 struct ata_eh_context eh_context;
473
1da177e4
LT		 474 struct ata_device device[ATA_MAX_DEVICES];
475
476 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 477 unsigned long qc_allocated;
1da177e4
LT		 478 unsigned int active_tag;
479
480 struct ata_host_stats stats;
481 struct ata_host_set *host_set;
2f1f610b 482 struct device *dev;
1da177e4 483
86e45b6b
TH		 484 struct work_struct port_task;
485
14be71f4 486 unsigned int hsm_task_state;
1da177e4 487
bfd60579 488 u32 msg_enable;
a72ec4ce 489 struct list_head eh_done_q;
bfd60579 490
1da177e4 491 void *private_data;
fe635c7e
TH		 492
493 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 494};
495
496struct ata_port_operations {
497 void (*port_disable) (struct ata_port *);
498
499 void (*dev_config) (struct ata_port *, struct ata_device *);
500
501 void (*set_piomode) (struct ata_port *, struct ata_device *);
502 void (*set_dmamode) (struct ata_port *, struct ata_device *);
5444a6f4 503 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
1da177e4 504
057ace5e 505 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 506 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
507
057ace5e 508 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 509 u8 (*check_status)(struct ata_port *ap);
510 u8 (*check_altstatus)(struct ata_port *ap);
1da177e4
LT		 511 void (*dev_select)(struct ata_port *ap, unsigned int device);
512
c19ba8af 513 void (*phy_reset) (struct ata_port *ap); /* obsolete */
e35a9e01 514 void (*set_mode) (struct ata_port *ap);
c19ba8af
TH		 515 int (*probe_reset) (struct ata_port *ap, unsigned int *classes);
516
1da177e4
LT		 517 void (*post_set_mode) (struct ata_port *ap);
518
519 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
520
521 void (*bmdma_setup) (struct ata_queued_cmd *qc);
522 void (*bmdma_start) (struct ata_queued_cmd *qc);
523
524 void (*qc_prep) (struct ata_queued_cmd *qc);
9a3d9eb0 525 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
1da177e4 526
9ec957f2
TH		 527 /* Error handlers. ->error_handler overrides ->eng_timeout and
528 * indicates that new-style EH is in place.
529 */
530 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
531
532 void (*freeze) (struct ata_port *ap);
533 void (*thaw) (struct ata_port *ap);
534 void (*error_handler) (struct ata_port *ap);
535 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
1da177e4
LT		 536
537 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
538 void (*irq_clear) (struct ata_port *);
539
540 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
541 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
542 u32 val);
543
544 int (*port_start) (struct ata_port *ap);
545 void (*port_stop) (struct ata_port *ap);
546
547 void (*host_stop) (struct ata_host_set *host_set);
548
b73fc89f 549 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 550 u8 (*bmdma_status) (struct ata_port *ap);
551};
552
553struct ata_port_info {
d0be4a7d 554 struct scsi_host_template *sht;
1da177e4
LT		 555 unsigned long host_flags;
556 unsigned long pio_mask;
557 unsigned long mwdma_mask;
558 unsigned long udma_mask;
057ace5e 559 const struct ata_port_operations *port_ops;
e99f8b5e 560 void *private_data;
1da177e4
LT		 561};
562
452503f9
AC		 563struct ata_timing {
564 unsigned short mode; /* ATA mode */
565 unsigned short setup; /* t1 */
566 unsigned short act8b; /* t2 for 8-bit I/O */
567 unsigned short rec8b; /* t2i for 8-bit I/O */
568 unsigned short cyc8b; /* t0 for 8-bit I/O */
569 unsigned short active; /* t2 or tD */
570 unsigned short recover; /* t2i or tK */
571 unsigned short cycle; /* t0 */
572 unsigned short udma; /* t2CYCTYP/2 */
573};
574
575#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
1da177e4
LT		 576
577extern void ata_port_probe(struct ata_port *);
578extern void __sata_phy_reset(struct ata_port *ap);
579extern void sata_phy_reset(struct ata_port *ap);
580extern void ata_bus_reset(struct ata_port *ap);
3c567b7d 581extern int sata_set_spd(struct ata_port *ap);
a62c0fc5 582extern int ata_drive_probe_reset(struct ata_port *ap,
7944ea95 583 ata_probeinit_fn_t probeinit,
a62c0fc5
TH		 584 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
585 ata_postreset_fn_t postreset, unsigned int *classes);
8a19ac89 586extern void ata_std_probeinit(struct ata_port *ap);
2bf2cb26
TH		 587extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
588extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
c2bd5804 589extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
3373efd8 590extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
1da177e4
LT		 591extern void ata_port_disable(struct ata_port *);
592extern void ata_std_ports(struct ata_ioports *ioaddr);
593#ifdef CONFIG_PCI
594extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
595 unsigned int n_ports);
596extern void ata_pci_remove_one (struct pci_dev *pdev);
9b847548
JA		 597extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
598extern int ata_pci_device_resume(struct pci_dev *pdev);
17bb34a3 599extern int ata_pci_clear_simplex(struct pci_dev *pdev);
1da177e4 600#endif /* CONFIG_PCI */
057ace5e 601extern int ata_device_add(const struct ata_probe_ent *ent);
17b14451 602extern void ata_host_set_remove(struct ata_host_set *host_set);
193515d5 603extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 604extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
605extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
1da177e4
LT		 606extern int ata_scsi_release(struct Scsi_Host *host);
607extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
34bf2170
TH		 608extern int sata_scr_valid(struct ata_port *ap);
609extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
610extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
611extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
612extern int ata_port_online(struct ata_port *ap);
613extern int ata_port_offline(struct ata_port *ap);
9b847548 614extern int ata_scsi_device_resume(struct scsi_device *);
082776e4 615extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state);
3373efd8
TH		 616extern int ata_device_resume(struct ata_device *);
617extern int ata_device_suspend(struct ata_device *, pm_message_t state);
67846b30 618extern int ata_ratelimit(void);
6f8b9958
TH		 619extern unsigned int ata_busy_sleep(struct ata_port *ap,
620 unsigned long timeout_pat,
621 unsigned long timeout);
86e45b6b
TH		 622extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
623 void *data, unsigned long delay);
c22daff4
TH		 624extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
625 unsigned long interval_msec,
626 unsigned long timeout_msec);
67846b30 627
1da177e4
LT		 628/*
629 * Default driver ops implementations
630 */
057ace5e 631extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 632extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
057ace5e
JG		 633extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
634extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1da177e4
LT		 635extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
636extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
637extern u8 ata_check_status(struct ata_port *ap);
638extern u8 ata_altstatus(struct ata_port *ap);
057ace5e 639extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
c2bd5804 640extern int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes);
1da177e4
LT		 641extern int ata_port_start (struct ata_port *ap);
642extern void ata_port_stop (struct ata_port *ap);
aa8f0dc6 643extern void ata_host_stop (struct ata_host_set *host_set);
1da177e4
LT		 644extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
645extern void ata_qc_prep(struct ata_queued_cmd *qc);
e46834cd 646extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
9a3d9eb0 647extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
1da177e4
LT		 648extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
649 unsigned int buflen);
650extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
651 unsigned int n_elem);
057ace5e 652extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
6a62a04d
TH		 653extern void ata_id_string(const u16 *id, unsigned char *s,
654 unsigned int ofs, unsigned int len);
655extern void ata_id_c_string(const u16 *id, unsigned char *s,
656 unsigned int ofs, unsigned int len);
1da177e4
LT		 657extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
658extern void ata_bmdma_start (struct ata_queued_cmd *qc);
b73fc89f 659extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 660extern u8 ata_bmdma_status(struct ata_port *ap);
661extern void ata_bmdma_irq_clear(struct ata_port *ap);
6d97dbd7
TH		 662extern void ata_bmdma_freeze(struct ata_port *ap);
663extern void ata_bmdma_thaw(struct ata_port *ap);
664extern void ata_bmdma_drive_eh(struct ata_port *ap,
665 ata_reset_fn_t softreset,
666 ata_reset_fn_t hardreset,
667 ata_postreset_fn_t postreset);
668extern void ata_bmdma_error_handler(struct ata_port *ap);
669extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
f686bcb8 670extern void ata_qc_complete(struct ata_queued_cmd *qc);
3373efd8 671extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 672 void (*done)(struct scsi_cmnd *));
673extern int ata_std_bios_param(struct scsi_device *sdev,
674 struct block_device *bdev,
675 sector_t capacity, int geom[]);
676extern int ata_scsi_slave_config(struct scsi_device *sdev);
3373efd8 677extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1da177e4 678
452503f9
AC		 679/*
680 * Timing helpers
681 */
1bc4ccff
AC		 682
683extern unsigned int ata_pio_need_iordy(const struct ata_device *);
452503f9
AC		 684extern int ata_timing_compute(struct ata_device *, unsigned short,
685 struct ata_timing *, int, int);
686extern void ata_timing_merge(const struct ata_timing *,
687 const struct ata_timing *, struct ata_timing *,
688 unsigned int);
689
690enum {
691 ATA_TIMING_SETUP = (1 << 0),
692 ATA_TIMING_ACT8B = (1 << 1),
693 ATA_TIMING_REC8B = (1 << 2),
694 ATA_TIMING_CYC8B = (1 << 3),
695 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
696 ATA_TIMING_CYC8B,
697 ATA_TIMING_ACTIVE = (1 << 4),
698 ATA_TIMING_RECOVER = (1 << 5),
699 ATA_TIMING_CYCLE = (1 << 6),
700 ATA_TIMING_UDMA = (1 << 7),
701 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
702 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
703 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
704 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
705};
706
1da177e4
LT		 707
708#ifdef CONFIG_PCI
709struct pci_bits {
710 unsigned int reg; /* PCI config register to read */
711 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
712 unsigned long mask;
713 unsigned long val;
714};
715
374b1873 716extern void ata_pci_host_stop (struct ata_host_set *host_set);
1da177e4 717extern struct ata_probe_ent *
47a86593 718ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
057ace5e 719extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
17bb34a3 720extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
1da177e4
LT		 721#endif /* CONFIG_PCI */
722
ece1d636
TH		 723/*
724 * EH
725 */
ece1d636 726extern void ata_eng_timeout(struct ata_port *ap);
7b70fc03
TH		 727
728extern void ata_port_schedule_eh(struct ata_port *ap);
729extern int ata_port_abort(struct ata_port *ap);
e3180499
TH		 730extern int ata_port_freeze(struct ata_port *ap);
731
732extern void ata_eh_freeze_port(struct ata_port *ap);
733extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 734
ece1d636
TH		 735extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
736extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
737
022bdb07
TH		 738extern void ata_do_eh(struct ata_port *ap, ata_reset_fn_t softreset,
739 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
740
61440db6
TH		 741/*
742 * printk helpers
743 */
744#define ata_port_printk(ap, lv, fmt, args...) \
745 printk(lv"ata%u: "fmt, (ap)->id , ##args)
746
747#define ata_dev_printk(dev, lv, fmt, args...) \
748 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
1da177e4 749
f3e81b19
TH		 750/*
751 * ata_eh_info helpers
752 */
753#define ata_ehi_push_desc(ehi, fmt, args...) do { \
754 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
755 ATA_EH_DESC_LEN - (ehi)->desc_len, \
756 fmt , ##args); \
757} while (0)
758
759#define ata_ehi_clear_desc(ehi) do { \
760 (ehi)->desc[0] = '\0'; \
761 (ehi)->desc_len = 0; \
762} while (0)
763
61440db6
TH		 764/*
765 * qc helpers
766 */
972c26bd
JG		 767static inline int
768ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
769{
770 if (sg == &qc->pad_sgent)
771 return 1;
772 if (qc->pad_len)
773 return 0;
774 if (((sg - qc->__sg) + 1) == qc->n_elem)
775 return 1;
776 return 0;
777}
778
cc1887f3
TH		 779static inline struct scatterlist *
780ata_qc_first_sg(struct ata_queued_cmd *qc)
781{
782 if (qc->n_elem)
783 return qc->__sg;
784 if (qc->pad_len)
785 return &qc->pad_sgent;
786 return NULL;
787}
788
cedc9a47
JG		 789static inline struct scatterlist *
790ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
791{
792 if (sg == &qc->pad_sgent)
793 return NULL;
794 if (++sg - qc->__sg < qc->n_elem)
795 return sg;
cc1887f3
TH		 796 if (qc->pad_len)
797 return &qc->pad_sgent;
798 return NULL;
cedc9a47
JG		 799}
800
801#define ata_for_each_sg(sg, qc) \
cc1887f3 802 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
cedc9a47 803
1da177e4
LT		 804static inline unsigned int ata_tag_valid(unsigned int tag)
805{
806 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
807}
808
2ab7db1f
TH		 809static inline unsigned int ata_tag_internal(unsigned int tag)
810{
811 return tag == ATA_MAX_QUEUE - 1;
812}
813
e1211e3f 814static inline unsigned int ata_class_enabled(unsigned int class)
597afd21
TH		 815{
816 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
817}
818
e1211e3f 819static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 820{
e1211e3f
TH		 821 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
822}
823
002c8054
TH		 824static inline unsigned int ata_class_absent(unsigned int class)
825{
826 return !ata_class_enabled(class) && !ata_class_disabled(class);
827}
828
e1211e3f
TH		 829static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
830{
831 return ata_class_enabled(dev->class);
832}
833
834static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
835{
836 return ata_class_disabled(dev->class);
1da177e4
LT		 837}
838
002c8054
TH		 839static inline unsigned int ata_dev_absent(const struct ata_device *dev)
840{
841 return ata_class_absent(dev->class);
842}
843
1da177e4
LT		 844static inline u8 ata_chk_status(struct ata_port *ap)
845{
846 return ap->ops->check_status(ap);
847}
848
0baab86b
EF		 849
850/**
851 * ata_pause - Flush writes and pause 400 nanoseconds.
852 * @ap: Port to wait for.
853 *
854 * LOCKING:
855 * Inherited from caller.
856 */
857
1da177e4
LT		 858static inline void ata_pause(struct ata_port *ap)
859{
860 ata_altstatus(ap);
861 ndelay(400);
862}
863
0baab86b
EF		 864
865/**
866 * ata_busy_wait - Wait for a port status register
867 * @ap: Port to wait for.
868 *
869 * Waits up to max*10 microseconds for the selected bits in the port's
870 * status register to be cleared.
871 * Returns final value of status register.
872 *
873 * LOCKING:
874 * Inherited from caller.
875 */
876
1da177e4
LT		 877static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
878 unsigned int max)
879{
880 u8 status;
881
882 do {
883 udelay(10);
884 status = ata_chk_status(ap);
885 max--;
886 } while ((status & bits) && (max > 0));
887
888 return status;
889}
890
0baab86b
EF		 891
892/**
893 * ata_wait_idle - Wait for a port to be idle.
894 * @ap: Port to wait for.
895 *
896 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
897 * Returns final value of status register.
898 *
899 * LOCKING:
900 * Inherited from caller.
901 */
902
1da177e4
LT		 903static inline u8 ata_wait_idle(struct ata_port *ap)
904{
905 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
906
907 if (status & (ATA_BUSY | ATA_DRQ)) {
908 unsigned long l = ap->ioaddr.status_addr;
bfd60579
RD		 909 if (ata_msg_warn(ap))
910 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
911 status, l);
1da177e4
LT		 912 }
913
914 return status;
915}
916
917static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
918{
919 qc->tf.ctl |= ATA_NIEN;
920}
921
f69499f4
TH		 922static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
923 unsigned int tag)
1da177e4
LT		 924{
925 if (likely(ata_tag_valid(tag)))
926 return &ap->qcmd[tag];
927 return NULL;
928}
929
f69499f4
TH		 930static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
931 unsigned int tag)
932{
933 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
934
935 if (unlikely(!qc) || !ap->ops->error_handler)
936 return qc;
937
938 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
939 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
940 return qc;
941
942 return NULL;
943}
944
3373efd8 945static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 946{
947 memset(tf, 0, sizeof(*tf));
948
3373efd8
TH		 949 tf->ctl = dev->ap->ctl;
950 if (dev->devno == 0)
1da177e4
LT		 951 tf->device = ATA_DEVICE_OBS;
952 else
953 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
954}
955
2c13b7ce
JG		 956static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
957{
958 qc->__sg = NULL;
959 qc->flags = 0;
960 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
961 qc->nsect = 0;
962 qc->nbytes = qc->curbytes = 0;
a22e2eb0 963 qc->err_mask = 0;
2c13b7ce 964
3373efd8 965 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 966
967 /* init result_tf such that it indicates normal completion */
968 qc->result_tf.command = ATA_DRDY;
969 qc->result_tf.feature = 0;
2c13b7ce
JG		 970}
971
0baab86b
EF		 972/**
973 * ata_irq_on - Enable interrupts on a port.
974 * @ap: Port on which interrupts are enabled.
975 *
976 * Enable interrupts on a legacy IDE device using MMIO or PIO,
977 * wait for idle, clear any pending interrupts.
978 *
979 * LOCKING:
980 * Inherited from caller.
981 */
982
1da177e4
LT		 983static inline u8 ata_irq_on(struct ata_port *ap)
984{
985 struct ata_ioports *ioaddr = &ap->ioaddr;
986 u8 tmp;
987
988 ap->ctl &= ~ATA_NIEN;
989 ap->last_ctl = ap->ctl;
990
991 if (ap->flags & ATA_FLAG_MMIO)
992 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
993 else
994 outb(ap->ctl, ioaddr->ctl_addr);
995 tmp = ata_wait_idle(ap);
996
997 ap->ops->irq_clear(ap);
998
999 return tmp;
1000}
1001
0baab86b
EF		 1002
1003/**
1004 * ata_irq_ack - Acknowledge a device interrupt.
1005 * @ap: Port on which interrupts are enabled.
1006 *
1007 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1008 * or BUSY+DRQ clear). Obtain dma status and port status from
1009 * device. Clear the interrupt. Return port status.
1010 *
1011 * LOCKING:
1012 */
1013
1da177e4
LT		 1014static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1015{
1016 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1017 u8 host_stat, post_stat, status;
1018
1019 status = ata_busy_wait(ap, bits, 1000);
1020 if (status & bits)
bfd60579
RD		 1021 if (ata_msg_err(ap))
1022 printk(KERN_ERR "abnormal status 0x%X\n", status);
1da177e4
LT		 1023
1024 /* get controller status; clear intr, err bits */
1025 if (ap->flags & ATA_FLAG_MMIO) {
1026 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1027 host_stat = readb(mmio + ATA_DMA_STATUS);
1028 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1029 mmio + ATA_DMA_STATUS);
1030
1031 post_stat = readb(mmio + ATA_DMA_STATUS);
1032 } else {
1033 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1034 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1035 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1036
1037 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1038 }
1039
bfd60579
RD		 1040 if (ata_msg_intr(ap))
1041 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1042 __FUNCTION__,
1043 host_stat, post_stat, status);
1da177e4
LT		 1044
1045 return status;
1046}
1047
057ace5e 1048static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1049{
1050 return ata_id_wcache_enabled(dev->id) ||
1051 ata_id_has_flush(dev->id) ||
1052 ata_id_has_flush_ext(dev->id);
1053}
1054
a7dac447
JG		 1055static inline unsigned int ac_err_mask(u8 status)
1056{
1057 if (status & ATA_BUSY)
11a56d24 1058 return AC_ERR_HSM;
a7dac447
JG		 1059 if (status & (ATA_ERR | ATA_DF))
1060 return AC_ERR_DEV;
1061 return 0;
1062}
1063
1064static inline unsigned int __ac_err_mask(u8 status)
1065{
1066 unsigned int mask = ac_err_mask(status);
1067 if (mask == 0)
1068 return AC_ERR_OTHER;
1069 return mask;
1070}
1071
6037d6bb
JG		 1072static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1073{
1074 ap->pad_dma = 0;
1075 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1076 &ap->pad_dma, GFP_KERNEL);
1077 return (ap->pad == NULL) ? -ENOMEM : 0;
1078}
1079
1080static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1081{
1082 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1083}
1084
35bb94b1
JG		 1085static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1086{
1087 return (struct ata_port *) &host->hostdata[0];
1088}
1089
1da177e4 1090#endif /* __LINUX_LIBATA_H__ */
Ubuntu Artful kernel mirror