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[PATCH] libata: implement ATA_EHI_PRINTINFO
[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>
41542dbe 33#include <asm/scatterlist.h>
1da177e4
LT		 34#include <asm/io.h>
35#include <linux/ata.h>
36#include <linux/workqueue.h>
35bb94b1 37#include <scsi/scsi_host.h>
1da177e4 38
a6d967a4
JG		 39/*
40 * Define if arch has non-standard setup. This is a _PCI_ standard
41 * not a legacy or ISA standard.
42 */
43#ifdef CONFIG_ATA_NONSTANDARD
2ec7df04 44#include <asm/libata-portmap.h>
a6d967a4
JG		 45#else
46#include <asm-generic/libata-portmap.h>
47#endif
2ec7df04 48
1da177e4 49/*
bfd60579
RD		 50 * compile-time options: to be removed as soon as all the drivers are
51 * converted to the new debugging mechanism
1da177e4
LT		 52 */
53#undef ATA_DEBUG /* debugging output */
54#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
55#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
56#undef ATA_NDEBUG /* define to disable quick runtime checks */
669a5db4 57#define ATA_ENABLE_PATA /* define to enable PATA support in some
1da177e4 58 * low-level drivers */
1da177e4
LT		 59
60
61/* note: prints function name for you */
62#ifdef ATA_DEBUG
63#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
64#ifdef ATA_VERBOSE_DEBUG
65#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
66#else
67#define VPRINTK(fmt, args...)
68#endif /* ATA_VERBOSE_DEBUG */
69#else
70#define DPRINTK(fmt, args...)
71#define VPRINTK(fmt, args...)
72#endif /* ATA_DEBUG */
73
2c13b7ce
JG		 74#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
75
bfd60579
RD		 76/* NEW: debug levels */
77#define HAVE_LIBATA_MSG 1
78
79enum {
80 ATA_MSG_DRV = 0x0001,
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_CTL = 0x0020,
86 ATA_MSG_INTR = 0x0040,
87 ATA_MSG_ERR = 0x0080,
88};
89
90#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98
99static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100{
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 if (!dval)
104 return 0;
105 return (1 << dval) - 1;
106}
107
1da177e4
LT		 108/* defines only for the constants which don't work well as enums */
109#define ATA_TAG_POISON 0xfafbfcfdU
110
111/* move to PCI layer? */
54bb3a94
JG		 112#define PCI_VDEVICE(vendor, device) \
113 PCI_VENDOR_ID_##vendor, (device), \
114 PCI_ANY_ID, PCI_ANY_ID, 0, 0
115
1da177e4
LT		 116static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
117{
118 return &pdev->dev;
119}
120
121enum {
122 /* various global constants */
123 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
124 ATA_MAX_PORTS = 8,
125 ATA_DEF_QUEUE = 1,
2ab7db1f 126 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
a6e6ce8e 127 ATA_MAX_QUEUE = 32,
2ab7db1f 128 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
1da177e4
LT		 129 ATA_MAX_BUS = 2,
130 ATA_DEF_BUSY_WAIT = 10000,
131 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
132
133 ATA_SHT_EMULATED = 1,
134 ATA_SHT_CMD_PER_LUN = 1,
135 ATA_SHT_THIS_ID = -1,
cf482935 136 ATA_SHT_USE_CLUSTERING = 1,
1da177e4
LT		 137
138 /* struct ata_device stuff */
949b38af
TH		 139 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
140 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
029f5468 141 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
88e49034 142 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
ea1dd4e1 143 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
949b38af 144
e5c9e081 145 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
3343571d 146 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
e5c9e081 147 ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */
72fa4b74 148 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
1da177e4 149
abdda733
TH		 150 ATA_DFLAG_DETACH = (1 << 16),
151 ATA_DFLAG_DETACHED = (1 << 17),
152
1da177e4
LT		 153 ATA_DEV_UNKNOWN = 0, /* unknown device */
154 ATA_DEV_ATA = 1, /* ATA device */
155 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
156 ATA_DEV_ATAPI = 3, /* ATAPI device */
157 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
158 ATA_DEV_NONE = 5, /* no device */
159
160 /* struct ata_port flags */
949b38af 161 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
1da177e4 162 /* (doesn't imply presence) */
949b38af
TH		 163 ATA_FLAG_SATA = (1 << 1),
164 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
165 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
166 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
167 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
168 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
169 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
170 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
7395acb2
TH		 171 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
172 * doesn't handle PIO interrupts */
173 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
abdda733
TH		 174 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
175 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
176 * Register FIS clearing BSY */
7395acb2 177 ATA_FLAG_DEBUGMSG = (1 << 13),
949b38af 178
b51e9e5d
TH		 179 /* The following flag belongs to ap->pflags but is kept in
180 * ap->flags because it's referenced in many LLDs and will be
181 * removed in not-too-distant future.
182 */
183 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
184
185 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
9ec957f2 186
b51e9e5d
TH		 187 /* struct ata_port pflags */
188 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
189 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
190 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
191 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
192 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
193 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
194 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
949b38af 195
b51e9e5d
TH		 196 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
197 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
500530f6 198 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
949b38af
TH		 199
200 /* struct ata_queued_cmd flags */
201 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
202 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
203 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
1da177e4 204 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
27197367 205 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672
TH		 206 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
207
9ec957f2
TH		 208 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
209 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
210 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 211
4e5ec5db 212 /* host set flags */
cca3974e 213 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
9bec2e38 214
1da177e4 215 /* various lengths of time */
8d238e01
AC		 216 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
217 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
a2a7a662
TH		 218 ATA_TMOUT_INTERNAL = 30 * HZ,
219 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
1da177e4
LT		 220
221 /* ATA bus states */
222 BUS_UNKNOWN = 0,
223 BUS_DMA = 1,
224 BUS_IDLE = 2,
225 BUS_NOINTR = 3,
226 BUS_NODATA = 4,
227 BUS_TIMER = 5,
228 BUS_PIO = 6,
229 BUS_EDD = 7,
230 BUS_IDENTIFY = 8,
231 BUS_PACKET = 9,
232
233 /* SATA port states */
234 PORT_UNKNOWN = 0,
235 PORT_ENABLED = 1,
236 PORT_DISABLED = 2,
237
238 /* encoding various smaller bitmaps into a single
1da7b0d0 239 * unsigned int bitmap
1da177e4 240 */
b352e57d
AC		 241 ATA_BITS_PIO = 7,
242 ATA_BITS_MWDMA = 5,
1da7b0d0
TH		 243 ATA_BITS_UDMA = 8,
244
245 ATA_SHIFT_PIO = 0,
246 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
247 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
248
249 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
250 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
251 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
cedc9a47
JG		 252
253 /* size of buffer to pad xfers ending on unaligned boundaries */
254 ATA_DMA_PAD_SZ = 4,
255 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
949b38af
TH		 256
257 /* masks for port functions */
47a86593
AC		 258 ATA_PORT_PRIMARY = (1 << 0),
259 ATA_PORT_SECONDARY = (1 << 1),
14d2bac1 260
0c247c55
TH		 261 /* ering size */
262 ATA_ERING_SIZE = 32,
263
f3e81b19
TH		 264 /* desc_len for ata_eh_info and context */
265 ATA_EH_DESC_LEN = 80,
266
9be1e979
TH		 267 /* reset / recovery action types */
268 ATA_EH_REVALIDATE = (1 << 0),
269 ATA_EH_SOFTRESET = (1 << 1),
270 ATA_EH_HARDRESET = (1 << 2),
02670bf3
TH		 271 ATA_EH_SUSPEND = (1 << 3),
272 ATA_EH_RESUME = (1 << 4),
273 ATA_EH_PM_FREEZE = (1 << 5),
9be1e979
TH		 274
275 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
02670bf3
TH		 276 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
277 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
9be1e979 278
f3e81b19 279 /* ata_eh_info->flags */
abdda733 280 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
13abf50d 281 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
1cdaf534
TH		 282 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
283 ATA_EHI_QUIET = (1 << 3), /* be quiet */
abdda733
TH		 284
285 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
efdaedc4 286 ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */
f3e81b19 287
13abf50d
TH		 288 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
289
ad9e2762
TH		 290 /* max repeat if error condition is still set after ->error_handler */
291 ATA_EH_MAX_REPEAT = 5,
292
14d2bac1
TH		 293 /* how hard are we gonna try to probe/recover devices */
294 ATA_PROBE_MAX_TRIES = 3,
022bdb07
TH		 295 ATA_EH_RESET_TRIES = 3,
296 ATA_EH_DEV_TRIES = 3,
f5914a46
TH		 297
298 /* Drive spinup time (time from power-on to the first D2H FIS)
299 * in msecs - 8s currently. Failing to get ready in this time
300 * isn't critical. It will result in reset failure for
301 * controllers which can't wait for the first D2H FIS. libata
302 * will retry, so it just has to be long enough to spin up
303 * most devices.
304 */
305 ATA_SPINUP_WAIT = 8000,
93590859
AC		 306
307 /* Horkage types. May be set by libata or controller on drives
308 (some horkage may be drive/controller pair dependant */
309
310 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
6919a0a6
AC		 311 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
312 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
1da177e4
LT		 313};
314
14be71f4 315enum hsm_task_states {
c56b14d2
AL		 316 HSM_ST_UNKNOWN, /* state unknown */
317 HSM_ST_IDLE, /* no command on going */
c56b14d2
AL		 318 HSM_ST, /* (waiting the device to) transfer data */
319 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2
AL		 320 HSM_ST_ERR, /* error */
321 HSM_ST_FIRST, /* (waiting the device to)
322 write CDB or first data block */
1da177e4
LT		 323};
324
a7dac447 325enum ata_completion_errors {
11a56d24
TH		 326 AC_ERR_DEV = (1 << 0), /* device reported error */
327 AC_ERR_HSM = (1 << 1), /* host state machine violation */
328 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
329 AC_ERR_MEDIA = (1 << 3), /* media error */
330 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
331 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
332 AC_ERR_SYSTEM = (1 << 6), /* system error */
333 AC_ERR_INVALID = (1 << 7), /* invalid argument */
334 AC_ERR_OTHER = (1 << 8), /* unknown */
a7dac447
JG		 335};
336
1da177e4
LT		 337/* forward declarations */
338struct scsi_device;
339struct ata_port_operations;
340struct ata_port;
341struct ata_queued_cmd;
342
343/* typedefs */
77853bf2 344typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
f5914a46
TH		 345typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
346typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
347typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
1da177e4
LT		 348
349struct ata_ioports {
350 unsigned long cmd_addr;
351 unsigned long data_addr;
352 unsigned long error_addr;
353 unsigned long feature_addr;
354 unsigned long nsect_addr;
355 unsigned long lbal_addr;
356 unsigned long lbam_addr;
357 unsigned long lbah_addr;
358 unsigned long device_addr;
359 unsigned long status_addr;
360 unsigned long command_addr;
361 unsigned long altstatus_addr;
362 unsigned long ctl_addr;
363 unsigned long bmdma_addr;
364 unsigned long scr_addr;
365};
366
367struct ata_probe_ent {
368 struct list_head node;
369 struct device *dev;
057ace5e 370 const struct ata_port_operations *port_ops;
193515d5 371 struct scsi_host_template *sht;
1da177e4
LT		 372 struct ata_ioports port[ATA_MAX_PORTS];
373 unsigned int n_ports;
dd5b06c4 374 unsigned int dummy_port_mask;
1da177e4
LT		 375 unsigned int pio_mask;
376 unsigned int mwdma_mask;
377 unsigned int udma_mask;
1da177e4 378 unsigned long irq;
2ec7df04 379 unsigned long irq2;
1da177e4 380 unsigned int irq_flags;
cca3974e
JG		 381 unsigned long port_flags;
382 unsigned long _host_flags;
1da177e4
LT		 383 void __iomem *mmio_base;
384 void *private_data;
fea63e38
TH		 385
386 /* port_info for the secondary port. Together with irq2, it's
387 * used to implement non-uniform secondary port. Currently,
388 * the only user is ata_piix combined mode. This workaround
389 * will be removed together with ata_probe_ent when init model
390 * is updated.
391 */
392 const struct ata_port_info *pinfo2;
1da177e4
LT		 393};
394
cca3974e 395struct ata_host {
1da177e4
LT		 396 spinlock_t lock;
397 struct device *dev;
398 unsigned long irq;
2ec7df04 399 unsigned long irq2;
1da177e4
LT		 400 void __iomem *mmio_base;
401 unsigned int n_ports;
402 void *private_data;
057ace5e 403 const struct ata_port_operations *ops;
5444a6f4
AC		 404 unsigned long flags;
405 int simplex_claimed; /* Keep seperate in case we
406 ever need to do this locked */
f0eb62b8 407 struct ata_port *ports[0];
1da177e4
LT		 408};
409
410struct ata_queued_cmd {
411 struct ata_port *ap;
412 struct ata_device *dev;
413
414 struct scsi_cmnd *scsicmd;
415 void (*scsidone)(struct scsi_cmnd *);
416
417 struct ata_taskfile tf;
418 u8 cdb[ATAPI_CDB_LEN];
419
420 unsigned long flags; /* ATA_QCFLAG_xxx */
421 unsigned int tag;
422 unsigned int n_elem;
cedc9a47 423 unsigned int orig_n_elem;
1da177e4
LT		 424
425 int dma_dir;
426
cedc9a47
JG		 427 unsigned int pad_len;
428
1da177e4
LT		 429 unsigned int nsect;
430 unsigned int cursect;
431
432 unsigned int nbytes;
433 unsigned int curbytes;
434
435 unsigned int cursg;
436 unsigned int cursg_ofs;
437
438 struct scatterlist sgent;
cedc9a47 439 struct scatterlist pad_sgent;
1da177e4
LT		 440 void *buf_virt;
441
cedc9a47
JG		 442 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
443 struct scatterlist *__sg;
1da177e4 444
a22e2eb0 445 unsigned int err_mask;
e61e0672 446 struct ata_taskfile result_tf;
1da177e4
LT		 447 ata_qc_cb_t complete_fn;
448
1da177e4
LT		 449 void *private_data;
450};
451
cca3974e 452struct ata_port_stats {
1da177e4
LT		 453 unsigned long unhandled_irq;
454 unsigned long idle_irq;
455 unsigned long rw_reqbuf;
456};
457
0c247c55
TH		 458struct ata_ering_entry {
459 int is_io;
460 unsigned int err_mask;
461 u64 timestamp;
462};
463
464struct ata_ering {
465 int cursor;
466 struct ata_ering_entry ring[ATA_ERING_SIZE];
467};
468
1da177e4 469struct ata_device {
38d87234 470 struct ata_port *ap;
72fa4b74 471 unsigned int devno; /* 0 or 1 */
1da177e4 472 unsigned long flags; /* ATA_DFLAG_xxx */
3edebac4 473 struct scsi_device *sdev; /* attached SCSI device */
72fa4b74
TH		 474 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
475 u64 n_sectors; /* size of device, if ATA */
1da177e4 476 unsigned int class; /* ATA_DEV_xxx */
fe635c7e 477 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
1da177e4
LT		 478 u8 pio_mode;
479 u8 dma_mode;
480 u8 xfer_mode;
481 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
482
8cbd6df1
AL		 483 unsigned int multi_count; /* sectors count for
484 READ/WRITE MULTIPLE */
b00eec1d 485 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 486 unsigned int cdb_len;
8bf62ece 487
acf356b1
TH		 488 /* per-dev xfer mask */
489 unsigned int pio_mask;
490 unsigned int mwdma_mask;
491 unsigned int udma_mask;
492
8bf62ece
AL		 493 /* for CHS addressing */
494 u16 cylinders; /* Number of cylinders */
495 u16 heads; /* Number of heads */
496 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 497
498 /* error history */
499 struct ata_ering ering;
93590859 500 unsigned int horkage; /* List of broken features */
1da177e4
LT		 501};
502
72fa4b74
TH		 503/* Offset into struct ata_device. Fields above it are maintained
504 * acress device init. Fields below are zeroed.
505 */
506#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
507
f3e81b19
TH		 508struct ata_eh_info {
509 struct ata_device *dev; /* offending device */
510 u32 serror; /* SError from LLDD */
511 unsigned int err_mask; /* port-wide err_mask */
512 unsigned int action; /* ATA_EH_* action mask */
47005f25 513 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 514 unsigned int flags; /* ATA_EHI_* flags */
abdda733
TH		 515
516 unsigned long hotplug_timestamp;
517 unsigned int probe_mask;
518
f3e81b19
TH		 519 char desc[ATA_EH_DESC_LEN];
520 int desc_len;
521};
522
523struct ata_eh_context {
524 struct ata_eh_info i;
525 int tries[ATA_MAX_DEVICES];
abdda733
TH		 526 unsigned int classes[ATA_MAX_DEVICES];
527 unsigned int did_probe_mask;
f3e81b19
TH		 528};
529
1da177e4 530struct ata_port {
cca3974e 531 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
057ace5e 532 const struct ata_port_operations *ops;
ba6a1308 533 spinlock_t *lock;
1da177e4 534 unsigned long flags; /* ATA_FLAG_xxx */
b51e9e5d 535 unsigned int pflags; /* ATA_PFLAG_xxx */
1da177e4
LT		 536 unsigned int id; /* unique id req'd by scsi midlyr */
537 unsigned int port_no; /* unique port #; from zero */
1da177e4
LT		 538
539 struct ata_prd *prd; /* our SG list */
540 dma_addr_t prd_dma; /* and its DMA mapping */
541
cedc9a47
JG		 542 void *pad; /* array of DMA pad buffers */
543 dma_addr_t pad_dma;
544
1da177e4
LT		 545 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
546
547 u8 ctl; /* cache of ATA control register */
548 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 549 unsigned int pio_mask;
550 unsigned int mwdma_mask;
551 unsigned int udma_mask;
552 unsigned int cbl; /* cable type; ATA_CBL_xxx */
5a04bf4b 553 unsigned int hw_sata_spd_limit;
1c3fae4d 554 unsigned int sata_spd_limit; /* SATA PHY speed limit */
1da177e4 555
cca3974e 556 /* record runtime error info, protected by host lock */
f3e81b19
TH		 557 struct ata_eh_info eh_info;
558 /* EH context owned by EH */
559 struct ata_eh_context eh_context;
560
1da177e4
LT		 561 struct ata_device device[ATA_MAX_DEVICES];
562
563 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 564 unsigned long qc_allocated;
dedaf2b0
TH		 565 unsigned int qc_active;
566
1da177e4 567 unsigned int active_tag;
dedaf2b0 568 u32 sactive;
1da177e4 569
cca3974e
JG		 570 struct ata_port_stats stats;
571 struct ata_host *host;
2f1f610b 572 struct device *dev;
1da177e4 573
9a9c77dc
TH		 574 struct work_struct port_task;
575 struct work_struct hotplug_task;
3b01b8af 576 struct work_struct scsi_rescan_task;
86e45b6b 577
14be71f4 578 unsigned int hsm_task_state;
1da177e4 579
bfd60579 580 u32 msg_enable;
a72ec4ce 581 struct list_head eh_done_q;
c6cf9e99 582 wait_queue_head_t eh_wait_q;
bfd60579 583
500530f6
TH		 584 pm_message_t pm_mesg;
585 int *pm_result;
586
1da177e4 587 void *private_data;
fe635c7e
TH		 588
589 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 590};
591
592struct ata_port_operations {
593 void (*port_disable) (struct ata_port *);
594
595 void (*dev_config) (struct ata_port *, struct ata_device *);
596
597 void (*set_piomode) (struct ata_port *, struct ata_device *);
598 void (*set_dmamode) (struct ata_port *, struct ata_device *);
5444a6f4 599 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
1da177e4 600
057ace5e 601 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 602 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
603
057ace5e 604 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 605 u8 (*check_status)(struct ata_port *ap);
606 u8 (*check_altstatus)(struct ata_port *ap);
1da177e4
LT		 607 void (*dev_select)(struct ata_port *ap, unsigned int device);
608
c19ba8af 609 void (*phy_reset) (struct ata_port *ap); /* obsolete */
e35a9e01 610 void (*set_mode) (struct ata_port *ap);
c19ba8af 611
1da177e4
LT		 612 void (*post_set_mode) (struct ata_port *ap);
613
614 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
615
616 void (*bmdma_setup) (struct ata_queued_cmd *qc);
617 void (*bmdma_start) (struct ata_queued_cmd *qc);
618
a6b2c5d4
AC		 619 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
620
1da177e4 621 void (*qc_prep) (struct ata_queued_cmd *qc);
9a3d9eb0 622 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
1da177e4 623
9ec957f2
TH		 624 /* Error handlers. ->error_handler overrides ->eng_timeout and
625 * indicates that new-style EH is in place.
626 */
627 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
628
629 void (*freeze) (struct ata_port *ap);
630 void (*thaw) (struct ata_port *ap);
631 void (*error_handler) (struct ata_port *ap);
632 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
1da177e4 633
7d12e780 634 irq_handler_t irq_handler;
1da177e4
LT		 635 void (*irq_clear) (struct ata_port *);
636
637 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
638 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
639 u32 val);
640
500530f6
TH		 641 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
642 int (*port_resume) (struct ata_port *ap);
643
1da177e4
LT		 644 int (*port_start) (struct ata_port *ap);
645 void (*port_stop) (struct ata_port *ap);
646
cca3974e 647 void (*host_stop) (struct ata_host *host);
1da177e4 648
b73fc89f 649 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 650 u8 (*bmdma_status) (struct ata_port *ap);
651};
652
653struct ata_port_info {
d0be4a7d 654 struct scsi_host_template *sht;
cca3974e 655 unsigned long flags;
1da177e4
LT		 656 unsigned long pio_mask;
657 unsigned long mwdma_mask;
658 unsigned long udma_mask;
057ace5e 659 const struct ata_port_operations *port_ops;
e99f8b5e 660 void *private_data;
1da177e4
LT		 661};
662
452503f9
AC		 663struct ata_timing {
664 unsigned short mode; /* ATA mode */
665 unsigned short setup; /* t1 */
666 unsigned short act8b; /* t2 for 8-bit I/O */
667 unsigned short rec8b; /* t2i for 8-bit I/O */
668 unsigned short cyc8b; /* t0 for 8-bit I/O */
669 unsigned short active; /* t2 or tD */
670 unsigned short recover; /* t2i or tK */
671 unsigned short cycle; /* t0 */
672 unsigned short udma; /* t2CYCTYP/2 */
673};
674
675#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
1da177e4 676
e9c83914
TH		 677extern const unsigned long sata_deb_timing_normal[];
678extern const unsigned long sata_deb_timing_hotplug[];
679extern const unsigned long sata_deb_timing_long[];
680
dd5b06c4
TH		 681extern const struct ata_port_operations ata_dummy_port_ops;
682
e9c83914
TH		 683static inline const unsigned long *
684sata_ehc_deb_timing(struct ata_eh_context *ehc)
685{
686 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
687 return sata_deb_timing_hotplug;
688 else
689 return sata_deb_timing_normal;
690}
d7bb4cc7 691
dd5b06c4
TH		 692static inline int ata_port_is_dummy(struct ata_port *ap)
693{
694 return ap->ops == &ata_dummy_port_ops;
695}
696
1da177e4
LT		 697extern void ata_port_probe(struct ata_port *);
698extern void __sata_phy_reset(struct ata_port *ap);
699extern void sata_phy_reset(struct ata_port *ap);
700extern void ata_bus_reset(struct ata_port *ap);
3c567b7d 701extern int sata_set_spd(struct ata_port *ap);
d7bb4cc7
TH		 702extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
703extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
f5914a46 704extern int ata_std_prereset(struct ata_port *ap);
2bf2cb26 705extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
b6103f6d
TH		 706extern int sata_port_hardreset(struct ata_port *ap,
707 const unsigned long *timing);
2bf2cb26 708extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
c2bd5804 709extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
1da177e4
LT		 710extern void ata_port_disable(struct ata_port *);
711extern void ata_std_ports(struct ata_ioports *ioaddr);
712#ifdef CONFIG_PCI
713extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
714 unsigned int n_ports);
715extern void ata_pci_remove_one (struct pci_dev *pdev);
3c5100c1 716extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
500530f6 717extern void ata_pci_device_do_resume(struct pci_dev *pdev);
3c5100c1 718extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
9b847548 719extern int ata_pci_device_resume(struct pci_dev *pdev);
17bb34a3 720extern int ata_pci_clear_simplex(struct pci_dev *pdev);
1da177e4 721#endif /* CONFIG_PCI */
057ace5e 722extern int ata_device_add(const struct ata_probe_ent *ent);
720ba126 723extern void ata_port_detach(struct ata_port *ap);
cca3974e
JG		 724extern void ata_host_init(struct ata_host *, struct device *,
725 unsigned long, const struct ata_port_operations *);
726extern void ata_host_remove(struct ata_host *host);
193515d5 727extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 728extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
729extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
1da177e4 730extern int ata_scsi_release(struct Scsi_Host *host);
80289167 731extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 732extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 733 struct ata_port_info *, struct Scsi_Host *);
734extern int ata_sas_port_init(struct ata_port *);
735extern int ata_sas_port_start(struct ata_port *ap);
736extern void ata_sas_port_stop(struct ata_port *ap);
737extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
738extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
739 struct ata_port *ap);
1da177e4 740extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
34bf2170
TH		 741extern int sata_scr_valid(struct ata_port *ap);
742extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
743extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
744extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
745extern int ata_port_online(struct ata_port *ap);
746extern int ata_port_offline(struct ata_port *ap);
9b847548 747extern int ata_scsi_device_resume(struct scsi_device *);
3c5100c1 748extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
cca3974e
JG		 749extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
750extern void ata_host_resume(struct ata_host *host);
67846b30 751extern int ata_ratelimit(void);
d1adc1bb
TH		 752extern int ata_busy_sleep(struct ata_port *ap,
753 unsigned long timeout_pat, unsigned long timeout);
86e45b6b
TH		 754extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
755 void *data, unsigned long delay);
c22daff4
TH		 756extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
757 unsigned long interval_msec,
758 unsigned long timeout_msec);
67846b30 759
1da177e4
LT		 760/*
761 * Default driver ops implementations
762 */
057ace5e 763extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 764extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
057ace5e
JG		 765extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
766extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1da177e4
LT		 767extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
768extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
769extern u8 ata_check_status(struct ata_port *ap);
770extern u8 ata_altstatus(struct ata_port *ap);
057ace5e 771extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 772extern int ata_port_start (struct ata_port *ap);
773extern void ata_port_stop (struct ata_port *ap);
cca3974e 774extern void ata_host_stop (struct ata_host *host);
7d12e780 775extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
a6b2c5d4
AC		 776extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
777 unsigned int buflen, int write_data);
778extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
779 unsigned int buflen, int write_data);
75e99585
AC		 780extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
781 unsigned int buflen, int write_data);
1da177e4 782extern void ata_qc_prep(struct ata_queued_cmd *qc);
e46834cd 783extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
9a3d9eb0 784extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
1da177e4
LT		 785extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
786 unsigned int buflen);
787extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
788 unsigned int n_elem);
057ace5e 789extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
6a62a04d
TH		 790extern void ata_id_string(const u16 *id, unsigned char *s,
791 unsigned int ofs, unsigned int len);
792extern void ata_id_c_string(const u16 *id, unsigned char *s,
793 unsigned int ofs, unsigned int len);
6919a0a6 794extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
1da177e4
LT		 795extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
796extern void ata_bmdma_start (struct ata_queued_cmd *qc);
b73fc89f 797extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 798extern u8 ata_bmdma_status(struct ata_port *ap);
799extern void ata_bmdma_irq_clear(struct ata_port *ap);
6d97dbd7
TH		 800extern void ata_bmdma_freeze(struct ata_port *ap);
801extern void ata_bmdma_thaw(struct ata_port *ap);
f5914a46 802extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
6d97dbd7
TH		 803 ata_reset_fn_t softreset,
804 ata_reset_fn_t hardreset,
805 ata_postreset_fn_t postreset);
806extern void ata_bmdma_error_handler(struct ata_port *ap);
807extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
9a1004d0
TH		 808extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
809 u8 status, int in_wq);
f686bcb8 810extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 811extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
812 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 813extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 814 void (*done)(struct scsi_cmnd *));
815extern int ata_std_bios_param(struct scsi_device *sdev,
816 struct block_device *bdev,
817 sector_t capacity, int geom[]);
818extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 819extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 820extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
821 int queue_depth);
3373efd8 822extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1da177e4 823
452503f9
AC		 824/*
825 * Timing helpers
826 */
1bc4ccff
AC		 827
828extern unsigned int ata_pio_need_iordy(const struct ata_device *);
452503f9
AC		 829extern int ata_timing_compute(struct ata_device *, unsigned short,
830 struct ata_timing *, int, int);
831extern void ata_timing_merge(const struct ata_timing *,
832 const struct ata_timing *, struct ata_timing *,
833 unsigned int);
834
835enum {
836 ATA_TIMING_SETUP = (1 << 0),
837 ATA_TIMING_ACT8B = (1 << 1),
838 ATA_TIMING_REC8B = (1 << 2),
839 ATA_TIMING_CYC8B = (1 << 3),
840 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
841 ATA_TIMING_CYC8B,
842 ATA_TIMING_ACTIVE = (1 << 4),
843 ATA_TIMING_RECOVER = (1 << 5),
844 ATA_TIMING_CYCLE = (1 << 6),
845 ATA_TIMING_UDMA = (1 << 7),
846 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
847 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
848 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
849 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
850};
851
1da177e4
LT		 852
853#ifdef CONFIG_PCI
854struct pci_bits {
855 unsigned int reg; /* PCI config register to read */
856 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
857 unsigned long mask;
858 unsigned long val;
859};
860
cca3974e 861extern void ata_pci_host_stop (struct ata_host *host);
1da177e4 862extern struct ata_probe_ent *
47a86593 863ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
057ace5e 864extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
17bb34a3 865extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
1da177e4
LT		 866#endif /* CONFIG_PCI */
867
ece1d636
TH		 868/*
869 * EH
870 */
ece1d636 871extern void ata_eng_timeout(struct ata_port *ap);
7b70fc03
TH		 872
873extern void ata_port_schedule_eh(struct ata_port *ap);
874extern int ata_port_abort(struct ata_port *ap);
e3180499
TH		 875extern int ata_port_freeze(struct ata_port *ap);
876
877extern void ata_eh_freeze_port(struct ata_port *ap);
878extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 879
ece1d636
TH		 880extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
881extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
882
f5914a46
TH		 883extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
884 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
885 ata_postreset_fn_t postreset);
022bdb07 886
61440db6
TH		 887/*
888 * printk helpers
889 */
890#define ata_port_printk(ap, lv, fmt, args...) \
891 printk(lv"ata%u: "fmt, (ap)->id , ##args)
892
893#define ata_dev_printk(dev, lv, fmt, args...) \
894 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
1da177e4 895
f3e81b19
TH		 896/*
897 * ata_eh_info helpers
898 */
899#define ata_ehi_push_desc(ehi, fmt, args...) do { \
900 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
901 ATA_EH_DESC_LEN - (ehi)->desc_len, \
902 fmt , ##args); \
903} while (0)
904
905#define ata_ehi_clear_desc(ehi) do { \
906 (ehi)->desc[0] = '\0'; \
907 (ehi)->desc_len = 0; \
908} while (0)
909
c0b6c037 910static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
084fe639
TH		 911{
912 if (ehi->flags & ATA_EHI_HOTPLUGGED)
913 return;
914
28324304 915 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
084fe639
TH		 916 ehi->hotplug_timestamp = jiffies;
917
084fe639
TH		 918 ehi->action |= ATA_EH_SOFTRESET;
919 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
920}
921
c0b6c037
TH		 922static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
923{
924 __ata_ehi_hotplugged(ehi);
925 ehi->err_mask |= AC_ERR_ATA_BUS;
926}
927
61440db6
TH		 928/*
929 * qc helpers
930 */
972c26bd
JG		 931static inline int
932ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
933{
934 if (sg == &qc->pad_sgent)
935 return 1;
936 if (qc->pad_len)
937 return 0;
938 if (((sg - qc->__sg) + 1) == qc->n_elem)
939 return 1;
940 return 0;
941}
942
cc1887f3
TH		 943static inline struct scatterlist *
944ata_qc_first_sg(struct ata_queued_cmd *qc)
945{
946 if (qc->n_elem)
947 return qc->__sg;
948 if (qc->pad_len)
949 return &qc->pad_sgent;
950 return NULL;
951}
952
cedc9a47
JG		 953static inline struct scatterlist *
954ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
955{
956 if (sg == &qc->pad_sgent)
957 return NULL;
958 if (++sg - qc->__sg < qc->n_elem)
959 return sg;
cc1887f3
TH		 960 if (qc->pad_len)
961 return &qc->pad_sgent;
962 return NULL;
cedc9a47
JG		 963}
964
965#define ata_for_each_sg(sg, qc) \
cc1887f3 966 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
cedc9a47 967
1da177e4
LT		 968static inline unsigned int ata_tag_valid(unsigned int tag)
969{
970 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
971}
972
2ab7db1f
TH		 973static inline unsigned int ata_tag_internal(unsigned int tag)
974{
975 return tag == ATA_MAX_QUEUE - 1;
976}
977
5806db22
TH		 978/*
979 * device helpers
980 */
e1211e3f 981static inline unsigned int ata_class_enabled(unsigned int class)
597afd21
TH		 982{
983 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
984}
985
e1211e3f 986static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 987{
e1211e3f
TH		 988 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
989}
990
002c8054
TH		 991static inline unsigned int ata_class_absent(unsigned int class)
992{
993 return !ata_class_enabled(class) && !ata_class_disabled(class);
994}
995
e1211e3f
TH		 996static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
997{
998 return ata_class_enabled(dev->class);
999}
1000
1001static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1002{
1003 return ata_class_disabled(dev->class);
1da177e4
LT		 1004}
1005
002c8054
TH		 1006static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1007{
1008 return ata_class_absent(dev->class);
1009}
1010
02670bf3
TH		 1011static inline unsigned int ata_dev_ready(const struct ata_device *dev)
1012{
1013 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
1014}
1015
5806db22
TH		 1016/*
1017 * port helpers
1018 */
1019static inline int ata_port_max_devices(const struct ata_port *ap)
1020{
1021 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1022 return 2;
1023 return 1;
1024}
1025
1026
1da177e4
LT		 1027static inline u8 ata_chk_status(struct ata_port *ap)
1028{
1029 return ap->ops->check_status(ap);
1030}
1031
0baab86b
EF		 1032
1033/**
1034 * ata_pause - Flush writes and pause 400 nanoseconds.
1035 * @ap: Port to wait for.
1036 *
1037 * LOCKING:
1038 * Inherited from caller.
1039 */
1040
1da177e4
LT		 1041static inline void ata_pause(struct ata_port *ap)
1042{
1043 ata_altstatus(ap);
1044 ndelay(400);
1045}
1046
0baab86b
EF		 1047
1048/**
1049 * ata_busy_wait - Wait for a port status register
1050 * @ap: Port to wait for.
1051 *
1052 * Waits up to max*10 microseconds for the selected bits in the port's
1053 * status register to be cleared.
1054 * Returns final value of status register.
1055 *
1056 * LOCKING:
1057 * Inherited from caller.
1058 */
1059
1da177e4
LT		 1060static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1061 unsigned int max)
1062{
1063 u8 status;
1064
1065 do {
1066 udelay(10);
1067 status = ata_chk_status(ap);
1068 max--;
d1adc1bb 1069 } while (status != 0xff && (status & bits) && (max > 0));
1da177e4
LT		 1070
1071 return status;
1072}
1073
0baab86b
EF		 1074
1075/**
1076 * ata_wait_idle - Wait for a port to be idle.
1077 * @ap: Port to wait for.
1078 *
1079 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1080 * Returns final value of status register.
1081 *
1082 * LOCKING:
1083 * Inherited from caller.
1084 */
1085
1da177e4
LT		 1086static inline u8 ata_wait_idle(struct ata_port *ap)
1087{
1088 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1089
d1adc1bb 1090 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
1da177e4 1091 unsigned long l = ap->ioaddr.status_addr;
bfd60579
RD		 1092 if (ata_msg_warn(ap))
1093 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
1094 status, l);
1da177e4
LT		 1095 }
1096
1097 return status;
1098}
1099
1100static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1101{
1102 qc->tf.ctl |= ATA_NIEN;
1103}
1104
f69499f4
TH		 1105static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1106 unsigned int tag)
1da177e4
LT		 1107{
1108 if (likely(ata_tag_valid(tag)))
1109 return &ap->qcmd[tag];
1110 return NULL;
1111}
1112
f69499f4
TH		 1113static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1114 unsigned int tag)
1115{
1116 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1117
1118 if (unlikely(!qc) || !ap->ops->error_handler)
1119 return qc;
1120
1121 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1122 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1123 return qc;
1124
1125 return NULL;
1126}
1127
3373efd8 1128static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1129{
1130 memset(tf, 0, sizeof(*tf));
1131
3373efd8
TH		 1132 tf->ctl = dev->ap->ctl;
1133 if (dev->devno == 0)
1da177e4
LT		 1134 tf->device = ATA_DEVICE_OBS;
1135 else
1136 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1137}
1138
2c13b7ce
JG		 1139static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1140{
1141 qc->__sg = NULL;
1142 qc->flags = 0;
1143 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1144 qc->nsect = 0;
1145 qc->nbytes = qc->curbytes = 0;
a22e2eb0 1146 qc->err_mask = 0;
2c13b7ce 1147
3373efd8 1148 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1149
1150 /* init result_tf such that it indicates normal completion */
1151 qc->result_tf.command = ATA_DRDY;
1152 qc->result_tf.feature = 0;
2c13b7ce
JG		 1153}
1154
0baab86b
EF		 1155/**
1156 * ata_irq_ack - Acknowledge a device interrupt.
1157 * @ap: Port on which interrupts are enabled.
1158 *
1159 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1160 * or BUSY+DRQ clear). Obtain dma status and port status from
1161 * device. Clear the interrupt. Return port status.
1162 *
1163 * LOCKING:
1164 */
1165
1da177e4
LT		 1166static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1167{
1168 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1169 u8 host_stat, post_stat, status;
1170
1171 status = ata_busy_wait(ap, bits, 1000);
1172 if (status & bits)
bfd60579
RD		 1173 if (ata_msg_err(ap))
1174 printk(KERN_ERR "abnormal status 0x%X\n", status);
1da177e4
LT		 1175
1176 /* get controller status; clear intr, err bits */
1177 if (ap->flags & ATA_FLAG_MMIO) {
1178 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1179 host_stat = readb(mmio + ATA_DMA_STATUS);
1180 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1181 mmio + ATA_DMA_STATUS);
1182
1183 post_stat = readb(mmio + ATA_DMA_STATUS);
1184 } else {
1185 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1186 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1187 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1188
1189 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1190 }
1191
bfd60579
RD		 1192 if (ata_msg_intr(ap))
1193 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1194 __FUNCTION__,
1195 host_stat, post_stat, status);
1da177e4
LT		 1196
1197 return status;
1198}
1199
057ace5e 1200static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1201{
1202 return ata_id_wcache_enabled(dev->id) ||
1203 ata_id_has_flush(dev->id) ||
1204 ata_id_has_flush_ext(dev->id);
1205}
1206
a7dac447
JG		 1207static inline unsigned int ac_err_mask(u8 status)
1208{
3655d1d3 1209 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1210 return AC_ERR_HSM;
a7dac447
JG		 1211 if (status & (ATA_ERR | ATA_DF))
1212 return AC_ERR_DEV;
1213 return 0;
1214}
1215
1216static inline unsigned int __ac_err_mask(u8 status)
1217{
1218 unsigned int mask = ac_err_mask(status);
1219 if (mask == 0)
1220 return AC_ERR_OTHER;
1221 return mask;
1222}
1223
6037d6bb
JG		 1224static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1225{
1226 ap->pad_dma = 0;
1227 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1228 &ap->pad_dma, GFP_KERNEL);
1229 return (ap->pad == NULL) ? -ENOMEM : 0;
1230}
1231
1232static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1233{
1234 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1235}
1236
35bb94b1
JG		 1237static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1238{
1239 return (struct ata_port *) &host->hostdata[0];
1240}
1241
1da177e4 1242#endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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