projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] Snoop SET FEATURES - WRITE CACHE ENABLE/DISABLE command(v5)
[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,
f5914a46
TH		 265
266 /* Drive spinup time (time from power-on to the first D2H FIS)
267 * in msecs - 8s currently. Failing to get ready in this time
268 * isn't critical. It will result in reset failure for
269 * controllers which can't wait for the first D2H FIS. libata
270 * will retry, so it just has to be long enough to spin up
271 * most devices.
272 */
273 ATA_SPINUP_WAIT = 8000,
1da177e4
LT		 274};
275
14be71f4 276enum hsm_task_states {
c56b14d2
AL		 277 HSM_ST_UNKNOWN, /* state unknown */
278 HSM_ST_IDLE, /* no command on going */
c56b14d2
AL		 279 HSM_ST, /* (waiting the device to) transfer data */
280 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2
AL		 281 HSM_ST_ERR, /* error */
282 HSM_ST_FIRST, /* (waiting the device to)
283 write CDB or first data block */
1da177e4
LT		 284};
285
a7dac447 286enum ata_completion_errors {
11a56d24
TH		 287 AC_ERR_DEV = (1 << 0), /* device reported error */
288 AC_ERR_HSM = (1 << 1), /* host state machine violation */
289 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
290 AC_ERR_MEDIA = (1 << 3), /* media error */
291 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
292 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
293 AC_ERR_SYSTEM = (1 << 6), /* system error */
294 AC_ERR_INVALID = (1 << 7), /* invalid argument */
295 AC_ERR_OTHER = (1 << 8), /* unknown */
a7dac447
JG		 296};
297
1da177e4
LT		 298/* forward declarations */
299struct scsi_device;
300struct ata_port_operations;
301struct ata_port;
302struct ata_queued_cmd;
303
304/* typedefs */
77853bf2 305typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
f5914a46
TH		 306typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
307typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
308typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
1da177e4
LT		 309
310struct ata_ioports {
311 unsigned long cmd_addr;
312 unsigned long data_addr;
313 unsigned long error_addr;
314 unsigned long feature_addr;
315 unsigned long nsect_addr;
316 unsigned long lbal_addr;
317 unsigned long lbam_addr;
318 unsigned long lbah_addr;
319 unsigned long device_addr;
320 unsigned long status_addr;
321 unsigned long command_addr;
322 unsigned long altstatus_addr;
323 unsigned long ctl_addr;
324 unsigned long bmdma_addr;
325 unsigned long scr_addr;
326};
327
328struct ata_probe_ent {
329 struct list_head node;
330 struct device *dev;
057ace5e 331 const struct ata_port_operations *port_ops;
193515d5 332 struct scsi_host_template *sht;
1da177e4
LT		 333 struct ata_ioports port[ATA_MAX_PORTS];
334 unsigned int n_ports;
335 unsigned int hard_port_no;
336 unsigned int pio_mask;
337 unsigned int mwdma_mask;
338 unsigned int udma_mask;
339 unsigned int legacy_mode;
340 unsigned long irq;
341 unsigned int irq_flags;
342 unsigned long host_flags;
4e5ec5db 343 unsigned long host_set_flags;
1da177e4
LT		 344 void __iomem *mmio_base;
345 void *private_data;
346};
347
348struct ata_host_set {
349 spinlock_t lock;
350 struct device *dev;
351 unsigned long irq;
352 void __iomem *mmio_base;
353 unsigned int n_ports;
354 void *private_data;
057ace5e 355 const struct ata_port_operations *ops;
5444a6f4
AC		 356 unsigned long flags;
357 int simplex_claimed; /* Keep seperate in case we
358 ever need to do this locked */
1da177e4
LT		 359 struct ata_port * ports[0];
360};
361
362struct ata_queued_cmd {
363 struct ata_port *ap;
364 struct ata_device *dev;
365
366 struct scsi_cmnd *scsicmd;
367 void (*scsidone)(struct scsi_cmnd *);
368
369 struct ata_taskfile tf;
370 u8 cdb[ATAPI_CDB_LEN];
371
372 unsigned long flags; /* ATA_QCFLAG_xxx */
373 unsigned int tag;
374 unsigned int n_elem;
cedc9a47 375 unsigned int orig_n_elem;
1da177e4
LT		 376
377 int dma_dir;
378
cedc9a47
JG		 379 unsigned int pad_len;
380
1da177e4
LT		 381 unsigned int nsect;
382 unsigned int cursect;
383
384 unsigned int nbytes;
385 unsigned int curbytes;
386
387 unsigned int cursg;
388 unsigned int cursg_ofs;
389
390 struct scatterlist sgent;
cedc9a47 391 struct scatterlist pad_sgent;
1da177e4
LT		 392 void *buf_virt;
393
cedc9a47
JG		 394 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
395 struct scatterlist *__sg;
1da177e4 396
a22e2eb0 397 unsigned int err_mask;
e61e0672 398 struct ata_taskfile result_tf;
1da177e4
LT		 399 ata_qc_cb_t complete_fn;
400
1da177e4
LT		 401 void *private_data;
402};
403
404struct ata_host_stats {
405 unsigned long unhandled_irq;
406 unsigned long idle_irq;
407 unsigned long rw_reqbuf;
408};
409
0c247c55
TH		 410struct ata_ering_entry {
411 int is_io;
412 unsigned int err_mask;
413 u64 timestamp;
414};
415
416struct ata_ering {
417 int cursor;
418 struct ata_ering_entry ring[ATA_ERING_SIZE];
419};
420
1da177e4 421struct ata_device {
38d87234 422 struct ata_port *ap;
72fa4b74 423 unsigned int devno; /* 0 or 1 */
1da177e4 424 unsigned long flags; /* ATA_DFLAG_xxx */
3edebac4 425 struct scsi_device *sdev; /* attached SCSI device */
72fa4b74
TH		 426 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
427 u64 n_sectors; /* size of device, if ATA */
1da177e4 428 unsigned int class; /* ATA_DEV_xxx */
fe635c7e 429 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
1da177e4
LT		 430 u8 pio_mode;
431 u8 dma_mode;
432 u8 xfer_mode;
433 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
434
8cbd6df1
AL		 435 unsigned int multi_count; /* sectors count for
436 READ/WRITE MULTIPLE */
b00eec1d 437 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 438 unsigned int cdb_len;
8bf62ece 439
acf356b1
TH		 440 /* per-dev xfer mask */
441 unsigned int pio_mask;
442 unsigned int mwdma_mask;
443 unsigned int udma_mask;
444
8bf62ece
AL		 445 /* for CHS addressing */
446 u16 cylinders; /* Number of cylinders */
447 u16 heads; /* Number of heads */
448 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 449
450 /* error history */
451 struct ata_ering ering;
1da177e4
LT		 452};
453
72fa4b74
TH		 454/* Offset into struct ata_device. Fields above it are maintained
455 * acress device init. Fields below are zeroed.
456 */
457#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
458
f3e81b19
TH		 459struct ata_eh_info {
460 struct ata_device *dev; /* offending device */
461 u32 serror; /* SError from LLDD */
462 unsigned int err_mask; /* port-wide err_mask */
463 unsigned int action; /* ATA_EH_* action mask */
464 unsigned int flags; /* ATA_EHI_* flags */
abdda733
TH		 465
466 unsigned long hotplug_timestamp;
467 unsigned int probe_mask;
468
f3e81b19
TH		 469 char desc[ATA_EH_DESC_LEN];
470 int desc_len;
471};
472
473struct ata_eh_context {
474 struct ata_eh_info i;
475 int tries[ATA_MAX_DEVICES];
abdda733
TH		 476 unsigned int classes[ATA_MAX_DEVICES];
477 unsigned int did_probe_mask;
f3e81b19
TH		 478};
479
1da177e4
LT		 480struct ata_port {
481 struct Scsi_Host *host; /* our co-allocated scsi host */
057ace5e 482 const struct ata_port_operations *ops;
1da177e4
LT		 483 unsigned long flags; /* ATA_FLAG_xxx */
484 unsigned int id; /* unique id req'd by scsi midlyr */
485 unsigned int port_no; /* unique port #; from zero */
486 unsigned int hard_port_no; /* hardware port #; from zero */
487
488 struct ata_prd *prd; /* our SG list */
489 dma_addr_t prd_dma; /* and its DMA mapping */
490
cedc9a47
JG		 491 void *pad; /* array of DMA pad buffers */
492 dma_addr_t pad_dma;
493
1da177e4
LT		 494 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
495
496 u8 ctl; /* cache of ATA control register */
497 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 498 unsigned int pio_mask;
499 unsigned int mwdma_mask;
500 unsigned int udma_mask;
501 unsigned int cbl; /* cable type; ATA_CBL_xxx */
5a04bf4b 502 unsigned int hw_sata_spd_limit;
1c3fae4d 503 unsigned int sata_spd_limit; /* SATA PHY speed limit */
1da177e4 504
f3e81b19
TH		 505 /* record runtime error info, protected by host_set lock */
506 struct ata_eh_info eh_info;
507 /* EH context owned by EH */
508 struct ata_eh_context eh_context;
509
1da177e4
LT		 510 struct ata_device device[ATA_MAX_DEVICES];
511
512 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 513 unsigned long qc_allocated;
dedaf2b0
TH		 514 unsigned int qc_active;
515
1da177e4 516 unsigned int active_tag;
dedaf2b0 517 u32 sactive;
1da177e4
LT		 518
519 struct ata_host_stats stats;
520 struct ata_host_set *host_set;
2f1f610b 521 struct device *dev;
1da177e4 522
9a9c77dc
TH		 523 struct work_struct port_task;
524 struct work_struct hotplug_task;
86e45b6b 525
14be71f4 526 unsigned int hsm_task_state;
1da177e4 527
bfd60579 528 u32 msg_enable;
a72ec4ce 529 struct list_head eh_done_q;
c6cf9e99 530 wait_queue_head_t eh_wait_q;
bfd60579 531
1da177e4 532 void *private_data;
fe635c7e
TH		 533
534 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 535};
536
537struct ata_port_operations {
538 void (*port_disable) (struct ata_port *);
539
540 void (*dev_config) (struct ata_port *, struct ata_device *);
541
542 void (*set_piomode) (struct ata_port *, struct ata_device *);
543 void (*set_dmamode) (struct ata_port *, struct ata_device *);
5444a6f4 544 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
1da177e4 545
057ace5e 546 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 547 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
548
057ace5e 549 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 550 u8 (*check_status)(struct ata_port *ap);
551 u8 (*check_altstatus)(struct ata_port *ap);
1da177e4
LT		 552 void (*dev_select)(struct ata_port *ap, unsigned int device);
553
c19ba8af 554 void (*phy_reset) (struct ata_port *ap); /* obsolete */
e35a9e01 555 void (*set_mode) (struct ata_port *ap);
c19ba8af 556
1da177e4
LT		 557 void (*post_set_mode) (struct ata_port *ap);
558
559 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
560
561 void (*bmdma_setup) (struct ata_queued_cmd *qc);
562 void (*bmdma_start) (struct ata_queued_cmd *qc);
563
a6b2c5d4
AC		 564 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
565
1da177e4 566 void (*qc_prep) (struct ata_queued_cmd *qc);
9a3d9eb0 567 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
1da177e4 568
9ec957f2
TH		 569 /* Error handlers. ->error_handler overrides ->eng_timeout and
570 * indicates that new-style EH is in place.
571 */
572 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
573
574 void (*freeze) (struct ata_port *ap);
575 void (*thaw) (struct ata_port *ap);
576 void (*error_handler) (struct ata_port *ap);
577 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
1da177e4
LT		 578
579 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
580 void (*irq_clear) (struct ata_port *);
581
582 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
583 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
584 u32 val);
585
586 int (*port_start) (struct ata_port *ap);
587 void (*port_stop) (struct ata_port *ap);
588
589 void (*host_stop) (struct ata_host_set *host_set);
590
b73fc89f 591 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 592 u8 (*bmdma_status) (struct ata_port *ap);
593};
594
595struct ata_port_info {
d0be4a7d 596 struct scsi_host_template *sht;
1da177e4
LT		 597 unsigned long host_flags;
598 unsigned long pio_mask;
599 unsigned long mwdma_mask;
600 unsigned long udma_mask;
057ace5e 601 const struct ata_port_operations *port_ops;
e99f8b5e 602 void *private_data;
1da177e4
LT		 603};
604
452503f9
AC		 605struct ata_timing {
606 unsigned short mode; /* ATA mode */
607 unsigned short setup; /* t1 */
608 unsigned short act8b; /* t2 for 8-bit I/O */
609 unsigned short rec8b; /* t2i for 8-bit I/O */
610 unsigned short cyc8b; /* t0 for 8-bit I/O */
611 unsigned short active; /* t2 or tD */
612 unsigned short recover; /* t2i or tK */
613 unsigned short cycle; /* t0 */
614 unsigned short udma; /* t2CYCTYP/2 */
615};
616
617#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
1da177e4 618
d7bb4cc7
TH		 619extern const unsigned long sata_deb_timing_boot[];
620extern const unsigned long sata_deb_timing_eh[];
621extern const unsigned long sata_deb_timing_before_fsrst[];
622
1da177e4
LT		 623extern void ata_port_probe(struct ata_port *);
624extern void __sata_phy_reset(struct ata_port *ap);
625extern void sata_phy_reset(struct ata_port *ap);
626extern void ata_bus_reset(struct ata_port *ap);
3c567b7d 627extern int sata_set_spd(struct ata_port *ap);
d7bb4cc7
TH		 628extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
629extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
f5914a46 630extern int ata_std_prereset(struct ata_port *ap);
2bf2cb26
TH		 631extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
632extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
c2bd5804 633extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
3373efd8 634extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
1da177e4
LT		 635extern void ata_port_disable(struct ata_port *);
636extern void ata_std_ports(struct ata_ioports *ioaddr);
637#ifdef CONFIG_PCI
638extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
639 unsigned int n_ports);
640extern void ata_pci_remove_one (struct pci_dev *pdev);
9b847548
JA		 641extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
642extern int ata_pci_device_resume(struct pci_dev *pdev);
17bb34a3 643extern int ata_pci_clear_simplex(struct pci_dev *pdev);
1da177e4 644#endif /* CONFIG_PCI */
057ace5e 645extern int ata_device_add(const struct ata_probe_ent *ent);
720ba126 646extern void ata_port_detach(struct ata_port *ap);
17b14451 647extern void ata_host_set_remove(struct ata_host_set *host_set);
193515d5 648extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 649extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
650extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
1da177e4
LT		 651extern int ata_scsi_release(struct Scsi_Host *host);
652extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
34bf2170
TH		 653extern int sata_scr_valid(struct ata_port *ap);
654extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
655extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
656extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
657extern int ata_port_online(struct ata_port *ap);
658extern int ata_port_offline(struct ata_port *ap);
9b847548 659extern int ata_scsi_device_resume(struct scsi_device *);
082776e4 660extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state);
3373efd8
TH		 661extern int ata_device_resume(struct ata_device *);
662extern int ata_device_suspend(struct ata_device *, pm_message_t state);
67846b30 663extern int ata_ratelimit(void);
6f8b9958
TH		 664extern unsigned int ata_busy_sleep(struct ata_port *ap,
665 unsigned long timeout_pat,
666 unsigned long timeout);
86e45b6b
TH		 667extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
668 void *data, unsigned long delay);
c22daff4
TH		 669extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
670 unsigned long interval_msec,
671 unsigned long timeout_msec);
67846b30 672
1da177e4
LT		 673/*
674 * Default driver ops implementations
675 */
057ace5e 676extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 677extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
057ace5e
JG		 678extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
679extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1da177e4
LT		 680extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
681extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
682extern u8 ata_check_status(struct ata_port *ap);
683extern u8 ata_altstatus(struct ata_port *ap);
057ace5e 684extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 685extern int ata_port_start (struct ata_port *ap);
686extern void ata_port_stop (struct ata_port *ap);
aa8f0dc6 687extern void ata_host_stop (struct ata_host_set *host_set);
1da177e4 688extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
a6b2c5d4
AC		 689extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
690 unsigned int buflen, int write_data);
691extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
692 unsigned int buflen, int write_data);
75e99585
AC		 693extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
694 unsigned int buflen, int write_data);
1da177e4 695extern void ata_qc_prep(struct ata_queued_cmd *qc);
e46834cd 696extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
9a3d9eb0 697extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
1da177e4
LT		 698extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
699 unsigned int buflen);
700extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
701 unsigned int n_elem);
057ace5e 702extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
6a62a04d
TH		 703extern void ata_id_string(const u16 *id, unsigned char *s,
704 unsigned int ofs, unsigned int len);
705extern void ata_id_c_string(const u16 *id, unsigned char *s,
706 unsigned int ofs, unsigned int len);
1da177e4
LT		 707extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
708extern void ata_bmdma_start (struct ata_queued_cmd *qc);
b73fc89f 709extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 710extern u8 ata_bmdma_status(struct ata_port *ap);
711extern void ata_bmdma_irq_clear(struct ata_port *ap);
6d97dbd7
TH		 712extern void ata_bmdma_freeze(struct ata_port *ap);
713extern void ata_bmdma_thaw(struct ata_port *ap);
f5914a46 714extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
6d97dbd7
TH		 715 ata_reset_fn_t softreset,
716 ata_reset_fn_t hardreset,
717 ata_postreset_fn_t postreset);
718extern void ata_bmdma_error_handler(struct ata_port *ap);
719extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
9a1004d0
TH		 720extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
721 u8 status, int in_wq);
f686bcb8 722extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 723extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
724 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 725extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 726 void (*done)(struct scsi_cmnd *));
727extern int ata_std_bios_param(struct scsi_device *sdev,
728 struct block_device *bdev,
729 sector_t capacity, int geom[]);
730extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 731extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 732extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
733 int queue_depth);
3373efd8 734extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1da177e4 735
452503f9
AC		 736/*
737 * Timing helpers
738 */
1bc4ccff
AC		 739
740extern unsigned int ata_pio_need_iordy(const struct ata_device *);
452503f9
AC		 741extern int ata_timing_compute(struct ata_device *, unsigned short,
742 struct ata_timing *, int, int);
743extern void ata_timing_merge(const struct ata_timing *,
744 const struct ata_timing *, struct ata_timing *,
745 unsigned int);
746
747enum {
748 ATA_TIMING_SETUP = (1 << 0),
749 ATA_TIMING_ACT8B = (1 << 1),
750 ATA_TIMING_REC8B = (1 << 2),
751 ATA_TIMING_CYC8B = (1 << 3),
752 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
753 ATA_TIMING_CYC8B,
754 ATA_TIMING_ACTIVE = (1 << 4),
755 ATA_TIMING_RECOVER = (1 << 5),
756 ATA_TIMING_CYCLE = (1 << 6),
757 ATA_TIMING_UDMA = (1 << 7),
758 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
759 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
760 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
761 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
762};
763
1da177e4
LT		 764
765#ifdef CONFIG_PCI
766struct pci_bits {
767 unsigned int reg; /* PCI config register to read */
768 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
769 unsigned long mask;
770 unsigned long val;
771};
772
374b1873 773extern void ata_pci_host_stop (struct ata_host_set *host_set);
1da177e4 774extern struct ata_probe_ent *
47a86593 775ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
057ace5e 776extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
17bb34a3 777extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
1da177e4
LT		 778#endif /* CONFIG_PCI */
779
ece1d636
TH		 780/*
781 * EH
782 */
ece1d636 783extern void ata_eng_timeout(struct ata_port *ap);
7b70fc03
TH		 784
785extern void ata_port_schedule_eh(struct ata_port *ap);
786extern int ata_port_abort(struct ata_port *ap);
e3180499
TH		 787extern int ata_port_freeze(struct ata_port *ap);
788
789extern void ata_eh_freeze_port(struct ata_port *ap);
790extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 791
ece1d636
TH		 792extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
793extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
794
f5914a46
TH		 795extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
796 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
797 ata_postreset_fn_t postreset);
022bdb07 798
61440db6
TH		 799/*
800 * printk helpers
801 */
802#define ata_port_printk(ap, lv, fmt, args...) \
803 printk(lv"ata%u: "fmt, (ap)->id , ##args)
804
805#define ata_dev_printk(dev, lv, fmt, args...) \
806 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
1da177e4 807
f3e81b19
TH		 808/*
809 * ata_eh_info helpers
810 */
811#define ata_ehi_push_desc(ehi, fmt, args...) do { \
812 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
813 ATA_EH_DESC_LEN - (ehi)->desc_len, \
814 fmt , ##args); \
815} while (0)
816
817#define ata_ehi_clear_desc(ehi) do { \
818 (ehi)->desc[0] = '\0'; \
819 (ehi)->desc_len = 0; \
820} while (0)
821
084fe639
TH		 822static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
823{
824 if (ehi->flags & ATA_EHI_HOTPLUGGED)
825 return;
826
827 ehi->flags |= ATA_EHI_HOTPLUGGED;
828 ehi->hotplug_timestamp = jiffies;
829
830 ehi->err_mask |= AC_ERR_ATA_BUS;
831 ehi->action |= ATA_EH_SOFTRESET;
832 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
833}
834
61440db6
TH		 835/*
836 * qc helpers
837 */
972c26bd
JG		 838static inline int
839ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
840{
841 if (sg == &qc->pad_sgent)
842 return 1;
843 if (qc->pad_len)
844 return 0;
845 if (((sg - qc->__sg) + 1) == qc->n_elem)
846 return 1;
847 return 0;
848}
849
cc1887f3
TH		 850static inline struct scatterlist *
851ata_qc_first_sg(struct ata_queued_cmd *qc)
852{
853 if (qc->n_elem)
854 return qc->__sg;
855 if (qc->pad_len)
856 return &qc->pad_sgent;
857 return NULL;
858}
859
cedc9a47
JG		 860static inline struct scatterlist *
861ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
862{
863 if (sg == &qc->pad_sgent)
864 return NULL;
865 if (++sg - qc->__sg < qc->n_elem)
866 return sg;
cc1887f3
TH		 867 if (qc->pad_len)
868 return &qc->pad_sgent;
869 return NULL;
cedc9a47
JG		 870}
871
872#define ata_for_each_sg(sg, qc) \
cc1887f3 873 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
cedc9a47 874
1da177e4
LT		 875static inline unsigned int ata_tag_valid(unsigned int tag)
876{
877 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
878}
879
2ab7db1f
TH		 880static inline unsigned int ata_tag_internal(unsigned int tag)
881{
882 return tag == ATA_MAX_QUEUE - 1;
883}
884
e1211e3f 885static inline unsigned int ata_class_enabled(unsigned int class)
597afd21
TH		 886{
887 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
888}
889
e1211e3f 890static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 891{
e1211e3f
TH		 892 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
893}
894
002c8054
TH		 895static inline unsigned int ata_class_absent(unsigned int class)
896{
897 return !ata_class_enabled(class) && !ata_class_disabled(class);
898}
899
e1211e3f
TH		 900static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
901{
902 return ata_class_enabled(dev->class);
903}
904
905static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
906{
907 return ata_class_disabled(dev->class);
1da177e4
LT		 908}
909
002c8054
TH		 910static inline unsigned int ata_dev_absent(const struct ata_device *dev)
911{
912 return ata_class_absent(dev->class);
913}
914
1da177e4
LT		 915static inline u8 ata_chk_status(struct ata_port *ap)
916{
917 return ap->ops->check_status(ap);
918}
919
0baab86b
EF		 920
921/**
922 * ata_pause - Flush writes and pause 400 nanoseconds.
923 * @ap: Port to wait for.
924 *
925 * LOCKING:
926 * Inherited from caller.
927 */
928
1da177e4
LT		 929static inline void ata_pause(struct ata_port *ap)
930{
931 ata_altstatus(ap);
932 ndelay(400);
933}
934
0baab86b
EF		 935
936/**
937 * ata_busy_wait - Wait for a port status register
938 * @ap: Port to wait for.
939 *
940 * Waits up to max*10 microseconds for the selected bits in the port's
941 * status register to be cleared.
942 * Returns final value of status register.
943 *
944 * LOCKING:
945 * Inherited from caller.
946 */
947
1da177e4
LT		 948static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
949 unsigned int max)
950{
951 u8 status;
952
953 do {
954 udelay(10);
955 status = ata_chk_status(ap);
956 max--;
957 } while ((status & bits) && (max > 0));
958
959 return status;
960}
961
0baab86b
EF		 962
963/**
964 * ata_wait_idle - Wait for a port to be idle.
965 * @ap: Port to wait for.
966 *
967 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
968 * Returns final value of status register.
969 *
970 * LOCKING:
971 * Inherited from caller.
972 */
973
1da177e4
LT		 974static inline u8 ata_wait_idle(struct ata_port *ap)
975{
976 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
977
978 if (status & (ATA_BUSY | ATA_DRQ)) {
979 unsigned long l = ap->ioaddr.status_addr;
bfd60579
RD		 980 if (ata_msg_warn(ap))
981 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
982 status, l);
1da177e4
LT		 983 }
984
985 return status;
986}
987
988static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
989{
990 qc->tf.ctl |= ATA_NIEN;
991}
992
f69499f4
TH		 993static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
994 unsigned int tag)
1da177e4
LT		 995{
996 if (likely(ata_tag_valid(tag)))
997 return &ap->qcmd[tag];
998 return NULL;
999}
1000
f69499f4
TH		 1001static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1002 unsigned int tag)
1003{
1004 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1005
1006 if (unlikely(!qc) || !ap->ops->error_handler)
1007 return qc;
1008
1009 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1010 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1011 return qc;
1012
1013 return NULL;
1014}
1015
3373efd8 1016static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1017{
1018 memset(tf, 0, sizeof(*tf));
1019
3373efd8
TH		 1020 tf->ctl = dev->ap->ctl;
1021 if (dev->devno == 0)
1da177e4
LT		 1022 tf->device = ATA_DEVICE_OBS;
1023 else
1024 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1025}
1026
2c13b7ce
JG		 1027static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1028{
1029 qc->__sg = NULL;
1030 qc->flags = 0;
1031 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1032 qc->nsect = 0;
1033 qc->nbytes = qc->curbytes = 0;
a22e2eb0 1034 qc->err_mask = 0;
2c13b7ce 1035
3373efd8 1036 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1037
1038 /* init result_tf such that it indicates normal completion */
1039 qc->result_tf.command = ATA_DRDY;
1040 qc->result_tf.feature = 0;
2c13b7ce
JG		 1041}
1042
0baab86b
EF		 1043/**
1044 * ata_irq_on - Enable interrupts on a port.
1045 * @ap: Port on which interrupts are enabled.
1046 *
1047 * Enable interrupts on a legacy IDE device using MMIO or PIO,
1048 * wait for idle, clear any pending interrupts.
1049 *
1050 * LOCKING:
1051 * Inherited from caller.
1052 */
1053
1da177e4
LT		 1054static inline u8 ata_irq_on(struct ata_port *ap)
1055{
1056 struct ata_ioports *ioaddr = &ap->ioaddr;
1057 u8 tmp;
1058
1059 ap->ctl &= ~ATA_NIEN;
1060 ap->last_ctl = ap->ctl;
1061
1062 if (ap->flags & ATA_FLAG_MMIO)
1063 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
1064 else
1065 outb(ap->ctl, ioaddr->ctl_addr);
1066 tmp = ata_wait_idle(ap);
1067
1068 ap->ops->irq_clear(ap);
1069
1070 return tmp;
1071}
1072
0baab86b
EF		 1073
1074/**
1075 * ata_irq_ack - Acknowledge a device interrupt.
1076 * @ap: Port on which interrupts are enabled.
1077 *
1078 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1079 * or BUSY+DRQ clear). Obtain dma status and port status from
1080 * device. Clear the interrupt. Return port status.
1081 *
1082 * LOCKING:
1083 */
1084
1da177e4
LT		 1085static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1086{
1087 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1088 u8 host_stat, post_stat, status;
1089
1090 status = ata_busy_wait(ap, bits, 1000);
1091 if (status & bits)
bfd60579
RD		 1092 if (ata_msg_err(ap))
1093 printk(KERN_ERR "abnormal status 0x%X\n", status);
1da177e4
LT		 1094
1095 /* get controller status; clear intr, err bits */
1096 if (ap->flags & ATA_FLAG_MMIO) {
1097 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1098 host_stat = readb(mmio + ATA_DMA_STATUS);
1099 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1100 mmio + ATA_DMA_STATUS);
1101
1102 post_stat = readb(mmio + ATA_DMA_STATUS);
1103 } else {
1104 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1105 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1106 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1107
1108 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1109 }
1110
bfd60579
RD		 1111 if (ata_msg_intr(ap))
1112 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1113 __FUNCTION__,
1114 host_stat, post_stat, status);
1da177e4
LT		 1115
1116 return status;
1117}
1118
057ace5e 1119static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1120{
1121 return ata_id_wcache_enabled(dev->id) ||
1122 ata_id_has_flush(dev->id) ||
1123 ata_id_has_flush_ext(dev->id);
1124}
1125
a7dac447
JG		 1126static inline unsigned int ac_err_mask(u8 status)
1127{
3655d1d3 1128 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1129 return AC_ERR_HSM;
a7dac447
JG		 1130 if (status & (ATA_ERR | ATA_DF))
1131 return AC_ERR_DEV;
1132 return 0;
1133}
1134
1135static inline unsigned int __ac_err_mask(u8 status)
1136{
1137 unsigned int mask = ac_err_mask(status);
1138 if (mask == 0)
1139 return AC_ERR_OTHER;
1140 return mask;
1141}
1142
6037d6bb
JG		 1143static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1144{
1145 ap->pad_dma = 0;
1146 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1147 &ap->pad_dma, GFP_KERNEL);
1148 return (ap->pad == NULL) ? -ENOMEM : 0;
1149}
1150
1151static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1152{
1153 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1154}
1155
35bb94b1
JG		 1156static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1157{
1158 return (struct ata_port *) &host->hostdata[0];
1159}
1160
1da177e4 1161#endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
This page took 0.190382 seconds and 5 git commands to generate.