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sata_nv: enable hotplug interrupt and fix some readl/readw mismatches
[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>
f0d36efd 34#include <linux/io.h>
1da177e4
LT		 35#include <linux/ata.h>
36#include <linux/workqueue.h>
35bb94b1 37#include <scsi/scsi_host.h>
11ef697b 38#include <linux/acpi.h>
1da177e4 39
a6d967a4
JG		 40/*
41 * Define if arch has non-standard setup. This is a _PCI_ standard
42 * not a legacy or ISA standard.
43 */
44#ifdef CONFIG_ATA_NONSTANDARD
2ec7df04 45#include <asm/libata-portmap.h>
a6d967a4
JG		 46#else
47#include <asm-generic/libata-portmap.h>
48#endif
2ec7df04 49
1da177e4 50/*
bfd60579
RD		 51 * compile-time options: to be removed as soon as all the drivers are
52 * converted to the new debugging mechanism
1da177e4
LT		 53 */
54#undef ATA_DEBUG /* debugging output */
55#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
56#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
57#undef ATA_NDEBUG /* define to disable quick runtime checks */
1da177e4
LT		 58
59
60/* note: prints function name for you */
61#ifdef ATA_DEBUG
62#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
63#ifdef ATA_VERBOSE_DEBUG
64#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65#else
66#define VPRINTK(fmt, args...)
67#endif /* ATA_VERBOSE_DEBUG */
68#else
69#define DPRINTK(fmt, args...)
70#define VPRINTK(fmt, args...)
71#endif /* ATA_DEBUG */
72
2c13b7ce
JG		 73#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
74
bfd60579
RD		 75/* NEW: debug levels */
76#define HAVE_LIBATA_MSG 1
77
78enum {
79 ATA_MSG_DRV = 0x0001,
80 ATA_MSG_INFO = 0x0002,
81 ATA_MSG_PROBE = 0x0004,
82 ATA_MSG_WARN = 0x0008,
83 ATA_MSG_MALLOC = 0x0010,
84 ATA_MSG_CTL = 0x0020,
85 ATA_MSG_INTR = 0x0040,
86 ATA_MSG_ERR = 0x0080,
87};
88
89#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
90#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
91#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
92#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
93#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
94#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
95#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
96#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
97
98static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
99{
100 if (dval < 0 || dval >= (sizeof(u32) * 8))
101 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
102 if (!dval)
103 return 0;
104 return (1 << dval) - 1;
105}
106
1da177e4
LT		 107/* defines only for the constants which don't work well as enums */
108#define ATA_TAG_POISON 0xfafbfcfdU
109
110/* move to PCI layer? */
111static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
112{
113 return &pdev->dev;
114}
115
116enum {
117 /* various global constants */
118 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
119 ATA_MAX_PORTS = 8,
120 ATA_DEF_QUEUE = 1,
2ab7db1f 121 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
a6e6ce8e 122 ATA_MAX_QUEUE = 32,
2ab7db1f 123 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
1da177e4
LT		 124 ATA_MAX_BUS = 2,
125 ATA_DEF_BUSY_WAIT = 10000,
126 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
127
128 ATA_SHT_EMULATED = 1,
129 ATA_SHT_CMD_PER_LUN = 1,
130 ATA_SHT_THIS_ID = -1,
cf482935 131 ATA_SHT_USE_CLUSTERING = 1,
1da177e4
LT		 132
133 /* struct ata_device stuff */
949b38af
TH		 134 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
135 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
029f5468 136 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
88e49034 137 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
6fc49adb 138 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
ea1dd4e1 139 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
949b38af 140
e5c9e081 141 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
3343571d 142 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
e5c9e081 143 ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */
72fa4b74 144 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
1da177e4 145
abdda733
TH		 146 ATA_DFLAG_DETACH = (1 << 16),
147 ATA_DFLAG_DETACHED = (1 << 17),
148
1da177e4
LT		 149 ATA_DEV_UNKNOWN = 0, /* unknown device */
150 ATA_DEV_ATA = 1, /* ATA device */
151 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
152 ATA_DEV_ATAPI = 3, /* ATAPI device */
153 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
154 ATA_DEV_NONE = 5, /* no device */
155
156 /* struct ata_port flags */
949b38af 157 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
1da177e4 158 /* (doesn't imply presence) */
949b38af
TH		 159 ATA_FLAG_SATA = (1 << 1),
160 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
161 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
162 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
163 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
164 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
165 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
166 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
7395acb2
TH		 167 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
168 * doesn't handle PIO interrupts */
169 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
abdda733
TH		 170 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
171 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
172 * Register FIS clearing BSY */
7395acb2 173 ATA_FLAG_DEBUGMSG = (1 << 13),
800b3996 174 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
b2a8bbe6 175 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
f834e49f 176 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
949b38af 177
b51e9e5d
TH		 178 /* The following flag belongs to ap->pflags but is kept in
179 * ap->flags because it's referenced in many LLDs and will be
180 * removed in not-too-distant future.
181 */
182 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
183
184 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
9ec957f2 185
b51e9e5d
TH		 186 /* struct ata_port pflags */
187 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
188 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
189 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
190 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
191 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
192 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
193 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
949b38af 194
b51e9e5d
TH		 195 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
196 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
500530f6 197 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
949b38af
TH		 198
199 /* struct ata_queued_cmd flags */
200 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
201 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
202 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
1da177e4 203 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
27197367 204 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672
TH		 205 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
206
9ec957f2
TH		 207 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
208 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
209 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 210
4e5ec5db 211 /* host set flags */
cca3974e 212 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
9bec2e38 213
1da177e4 214 /* various lengths of time */
8d238e01
AC		 215 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
216 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
a2a7a662
TH		 217 ATA_TMOUT_INTERNAL = 30 * HZ,
218 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
1da177e4
LT		 219
220 /* ATA bus states */
221 BUS_UNKNOWN = 0,
222 BUS_DMA = 1,
223 BUS_IDLE = 2,
224 BUS_NOINTR = 3,
225 BUS_NODATA = 4,
226 BUS_TIMER = 5,
227 BUS_PIO = 6,
228 BUS_EDD = 7,
229 BUS_IDENTIFY = 8,
230 BUS_PACKET = 9,
231
232 /* SATA port states */
233 PORT_UNKNOWN = 0,
234 PORT_ENABLED = 1,
235 PORT_DISABLED = 2,
236
237 /* encoding various smaller bitmaps into a single
1da7b0d0 238 * unsigned int bitmap
1da177e4 239 */
b352e57d
AC		 240 ATA_BITS_PIO = 7,
241 ATA_BITS_MWDMA = 5,
1da7b0d0
TH		 242 ATA_BITS_UDMA = 8,
243
244 ATA_SHIFT_PIO = 0,
245 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
246 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
247
248 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
249 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
250 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
cedc9a47
JG		 251
252 /* size of buffer to pad xfers ending on unaligned boundaries */
253 ATA_DMA_PAD_SZ = 4,
254 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
949b38af
TH		 255
256 /* masks for port functions */
47a86593
AC		 257 ATA_PORT_PRIMARY = (1 << 0),
258 ATA_PORT_SECONDARY = (1 << 1),
14d2bac1 259
0c247c55
TH		 260 /* ering size */
261 ATA_ERING_SIZE = 32,
262
f3e81b19
TH		 263 /* desc_len for ata_eh_info and context */
264 ATA_EH_DESC_LEN = 80,
265
9be1e979
TH		 266 /* reset / recovery action types */
267 ATA_EH_REVALIDATE = (1 << 0),
268 ATA_EH_SOFTRESET = (1 << 1),
269 ATA_EH_HARDRESET = (1 << 2),
02670bf3
TH		 270 ATA_EH_SUSPEND = (1 << 3),
271 ATA_EH_RESUME = (1 << 4),
272 ATA_EH_PM_FREEZE = (1 << 5),
9be1e979
TH		 273
274 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
02670bf3
TH		 275 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
276 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
9be1e979 277
f3e81b19 278 /* ata_eh_info->flags */
abdda733 279 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
13abf50d 280 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
1cdaf534
TH		 281 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
282 ATA_EHI_QUIET = (1 << 3), /* be quiet */
abdda733
TH		 283
284 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
efdaedc4 285 ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */
baa1e78a
TH		 286 ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */
287 ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */
f3e81b19 288
13abf50d
TH		 289 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
290
ad9e2762
TH		 291 /* max repeat if error condition is still set after ->error_handler */
292 ATA_EH_MAX_REPEAT = 5,
293
14d2bac1
TH		 294 /* how hard are we gonna try to probe/recover devices */
295 ATA_PROBE_MAX_TRIES = 3,
022bdb07
TH		 296 ATA_EH_RESET_TRIES = 3,
297 ATA_EH_DEV_TRIES = 3,
f5914a46
TH		 298
299 /* Drive spinup time (time from power-on to the first D2H FIS)
300 * in msecs - 8s currently. Failing to get ready in this time
301 * isn't critical. It will result in reset failure for
302 * controllers which can't wait for the first D2H FIS. libata
303 * will retry, so it just has to be long enough to spin up
304 * most devices.
305 */
306 ATA_SPINUP_WAIT = 8000,
f20b16ff 307
93590859
AC		 308 /* Horkage types. May be set by libata or controller on drives
309 (some horkage may be drive/controller pair dependant */
310
311 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
6919a0a6
AC		 312 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
313 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
1da177e4
LT		 314};
315
14be71f4 316enum hsm_task_states {
c56b14d2 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 */
55a8e2c8 335 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
a7dac447
JG		 336};
337
1da177e4
LT		 338/* forward declarations */
339struct scsi_device;
340struct ata_port_operations;
341struct ata_port;
342struct ata_queued_cmd;
343
344/* typedefs */
77853bf2 345typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
f5914a46
TH		 346typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
347typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
348typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
1da177e4
LT		 349
350struct ata_ioports {
0d5ff566
TH		 351 void __iomem *cmd_addr;
352 void __iomem *data_addr;
353 void __iomem *error_addr;
354 void __iomem *feature_addr;
355 void __iomem *nsect_addr;
356 void __iomem *lbal_addr;
357 void __iomem *lbam_addr;
358 void __iomem *lbah_addr;
359 void __iomem *device_addr;
360 void __iomem *status_addr;
361 void __iomem *command_addr;
362 void __iomem *altstatus_addr;
363 void __iomem *ctl_addr;
364 void __iomem *bmdma_addr;
365 void __iomem *scr_addr;
1da177e4
LT		 366};
367
368struct ata_probe_ent {
369 struct list_head node;
370 struct device *dev;
057ace5e 371 const struct ata_port_operations *port_ops;
193515d5 372 struct scsi_host_template *sht;
1da177e4
LT		 373 struct ata_ioports port[ATA_MAX_PORTS];
374 unsigned int n_ports;
dd5b06c4 375 unsigned int dummy_port_mask;
1da177e4
LT		 376 unsigned int pio_mask;
377 unsigned int mwdma_mask;
378 unsigned int udma_mask;
1da177e4 379 unsigned long irq;
2ec7df04 380 unsigned long irq2;
1da177e4 381 unsigned int irq_flags;
cca3974e
JG		 382 unsigned long port_flags;
383 unsigned long _host_flags;
0d5ff566 384 void __iomem * const *iomap;
1da177e4 385 void *private_data;
fea63e38
TH		 386
387 /* port_info for the secondary port. Together with irq2, it's
388 * used to implement non-uniform secondary port. Currently,
389 * the only user is ata_piix combined mode. This workaround
390 * will be removed together with ata_probe_ent when init model
391 * is updated.
392 */
393 const struct ata_port_info *pinfo2;
1da177e4
LT		 394};
395
cca3974e 396struct ata_host {
1da177e4
LT		 397 spinlock_t lock;
398 struct device *dev;
399 unsigned long irq;
2ec7df04 400 unsigned long irq2;
0d5ff566 401 void __iomem * const *iomap;
1da177e4
LT		 402 unsigned int n_ports;
403 void *private_data;
057ace5e 404 const struct ata_port_operations *ops;
5444a6f4
AC		 405 unsigned long flags;
406 int simplex_claimed; /* Keep seperate in case we
407 ever need to do this locked */
f0eb62b8 408 struct ata_port *ports[0];
1da177e4
LT		 409};
410
411struct ata_queued_cmd {
412 struct ata_port *ap;
413 struct ata_device *dev;
414
415 struct scsi_cmnd *scsicmd;
416 void (*scsidone)(struct scsi_cmnd *);
417
418 struct ata_taskfile tf;
419 u8 cdb[ATAPI_CDB_LEN];
420
421 unsigned long flags; /* ATA_QCFLAG_xxx */
422 unsigned int tag;
423 unsigned int n_elem;
cedc9a47 424 unsigned int orig_n_elem;
1da177e4
LT		 425
426 int dma_dir;
427
cedc9a47
JG		 428 unsigned int pad_len;
429
1da177e4
LT		 430 unsigned int nbytes;
431 unsigned int curbytes;
432
433 unsigned int cursg;
434 unsigned int cursg_ofs;
435
436 struct scatterlist sgent;
cedc9a47 437 struct scatterlist pad_sgent;
1da177e4
LT		 438 void *buf_virt;
439
cedc9a47
JG		 440 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
441 struct scatterlist *__sg;
1da177e4 442
a22e2eb0 443 unsigned int err_mask;
e61e0672 444 struct ata_taskfile result_tf;
1da177e4
LT		 445 ata_qc_cb_t complete_fn;
446
1da177e4
LT		 447 void *private_data;
448};
449
cca3974e 450struct ata_port_stats {
1da177e4
LT		 451 unsigned long unhandled_irq;
452 unsigned long idle_irq;
453 unsigned long rw_reqbuf;
454};
455
0c247c55
TH		 456struct ata_ering_entry {
457 int is_io;
458 unsigned int err_mask;
459 u64 timestamp;
460};
461
462struct ata_ering {
463 int cursor;
464 struct ata_ering_entry ring[ATA_ERING_SIZE];
465};
466
1da177e4 467struct ata_device {
38d87234 468 struct ata_port *ap;
72fa4b74 469 unsigned int devno; /* 0 or 1 */
1da177e4 470 unsigned long flags; /* ATA_DFLAG_xxx */
3edebac4 471 struct scsi_device *sdev; /* attached SCSI device */
72fa4b74
TH		 472 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
473 u64 n_sectors; /* size of device, if ATA */
1da177e4 474 unsigned int class; /* ATA_DEV_xxx */
fe635c7e 475 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
1da177e4
LT		 476 u8 pio_mode;
477 u8 dma_mode;
478 u8 xfer_mode;
479 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
480
8cbd6df1
AL		 481 unsigned int multi_count; /* sectors count for
482 READ/WRITE MULTIPLE */
b00eec1d 483 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 484 unsigned int cdb_len;
8bf62ece 485
acf356b1
TH		 486 /* per-dev xfer mask */
487 unsigned int pio_mask;
488 unsigned int mwdma_mask;
489 unsigned int udma_mask;
490
8bf62ece
AL		 491 /* for CHS addressing */
492 u16 cylinders; /* Number of cylinders */
493 u16 heads; /* Number of heads */
494 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 495
496 /* error history */
497 struct ata_ering ering;
7d47e8d4 498 int spdn_cnt;
93590859 499 unsigned int horkage; /* List of broken features */
11ef697b
KCA		 500#ifdef CONFIG_SATA_ACPI
501 /* ACPI objects info */
502 acpi_handle obj_handle;
503#endif
1da177e4
LT		 504};
505
72fa4b74
TH		 506/* Offset into struct ata_device. Fields above it are maintained
507 * acress device init. Fields below are zeroed.
508 */
509#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
510
f3e81b19
TH		 511struct ata_eh_info {
512 struct ata_device *dev; /* offending device */
513 u32 serror; /* SError from LLDD */
514 unsigned int err_mask; /* port-wide err_mask */
515 unsigned int action; /* ATA_EH_* action mask */
47005f25 516 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 517 unsigned int flags; /* ATA_EHI_* flags */
abdda733
TH		 518
519 unsigned long hotplug_timestamp;
520 unsigned int probe_mask;
521
f3e81b19
TH		 522 char desc[ATA_EH_DESC_LEN];
523 int desc_len;
524};
525
526struct ata_eh_context {
527 struct ata_eh_info i;
528 int tries[ATA_MAX_DEVICES];
abdda733
TH		 529 unsigned int classes[ATA_MAX_DEVICES];
530 unsigned int did_probe_mask;
f3e81b19
TH		 531};
532
1da177e4 533struct ata_port {
cca3974e 534 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
057ace5e 535 const struct ata_port_operations *ops;
ba6a1308 536 spinlock_t *lock;
1da177e4 537 unsigned long flags; /* ATA_FLAG_xxx */
b51e9e5d 538 unsigned int pflags; /* ATA_PFLAG_xxx */
1da177e4
LT		 539 unsigned int id; /* unique id req'd by scsi midlyr */
540 unsigned int port_no; /* unique port #; from zero */
1da177e4
LT		 541
542 struct ata_prd *prd; /* our SG list */
543 dma_addr_t prd_dma; /* and its DMA mapping */
544
cedc9a47
JG		 545 void *pad; /* array of DMA pad buffers */
546 dma_addr_t pad_dma;
547
1da177e4
LT		 548 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
549
550 u8 ctl; /* cache of ATA control register */
551 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 552 unsigned int pio_mask;
553 unsigned int mwdma_mask;
554 unsigned int udma_mask;
555 unsigned int cbl; /* cable type; ATA_CBL_xxx */
5a04bf4b 556 unsigned int hw_sata_spd_limit;
1c3fae4d 557 unsigned int sata_spd_limit; /* SATA PHY speed limit */
1da177e4 558
cca3974e 559 /* record runtime error info, protected by host lock */
f3e81b19
TH		 560 struct ata_eh_info eh_info;
561 /* EH context owned by EH */
562 struct ata_eh_context eh_context;
563
1da177e4
LT		 564 struct ata_device device[ATA_MAX_DEVICES];
565
566 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 567 unsigned long qc_allocated;
dedaf2b0
TH		 568 unsigned int qc_active;
569
1da177e4 570 unsigned int active_tag;
dedaf2b0 571 u32 sactive;
1da177e4 572
cca3974e
JG		 573 struct ata_port_stats stats;
574 struct ata_host *host;
2f1f610b 575 struct device *dev;
1da177e4 576
65f27f38 577 void *port_task_data;
52bad64d
DH		 578 struct delayed_work port_task;
579 struct delayed_work hotplug_task;
3b01b8af 580 struct work_struct scsi_rescan_task;
86e45b6b 581
14be71f4 582 unsigned int hsm_task_state;
1da177e4 583
bfd60579 584 u32 msg_enable;
a72ec4ce 585 struct list_head eh_done_q;
c6cf9e99 586 wait_queue_head_t eh_wait_q;
bfd60579 587
500530f6
TH		 588 pm_message_t pm_mesg;
589 int *pm_result;
590
1da177e4 591 void *private_data;
fe635c7e
TH		 592
593 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 594};
595
596struct ata_port_operations {
597 void (*port_disable) (struct ata_port *);
598
599 void (*dev_config) (struct ata_port *, struct ata_device *);
600
601 void (*set_piomode) (struct ata_port *, struct ata_device *);
602 void (*set_dmamode) (struct ata_port *, struct ata_device *);
5444a6f4 603 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
1da177e4 604
057ace5e 605 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 606 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
607
057ace5e 608 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 609 u8 (*check_status)(struct ata_port *ap);
610 u8 (*check_altstatus)(struct ata_port *ap);
1da177e4
LT		 611 void (*dev_select)(struct ata_port *ap, unsigned int device);
612
c19ba8af 613 void (*phy_reset) (struct ata_port *ap); /* obsolete */
b229a7b0 614 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev);
c19ba8af 615
1da177e4
LT		 616 void (*post_set_mode) (struct ata_port *ap);
617
b229a7b0 618 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
1da177e4
LT		 619
620 void (*bmdma_setup) (struct ata_queued_cmd *qc);
621 void (*bmdma_start) (struct ata_queued_cmd *qc);
622
a6b2c5d4
AC		 623 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
624
1da177e4 625 void (*qc_prep) (struct ata_queued_cmd *qc);
9a3d9eb0 626 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
1da177e4 627
9ec957f2
TH		 628 /* Error handlers. ->error_handler overrides ->eng_timeout and
629 * indicates that new-style EH is in place.
630 */
631 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
632
633 void (*freeze) (struct ata_port *ap);
634 void (*thaw) (struct ata_port *ap);
635 void (*error_handler) (struct ata_port *ap);
636 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
1da177e4 637
7d12e780 638 irq_handler_t irq_handler;
1da177e4 639 void (*irq_clear) (struct ata_port *);
83625006
AI		 640 u8 (*irq_on) (struct ata_port *);
641 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
1da177e4
LT		 642
643 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
644 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
645 u32 val);
646
500530f6
TH		 647 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
648 int (*port_resume) (struct ata_port *ap);
649
1da177e4
LT		 650 int (*port_start) (struct ata_port *ap);
651 void (*port_stop) (struct ata_port *ap);
652
cca3974e 653 void (*host_stop) (struct ata_host *host);
1da177e4 654
b73fc89f 655 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 656 u8 (*bmdma_status) (struct ata_port *ap);
657};
658
659struct ata_port_info {
d0be4a7d 660 struct scsi_host_template *sht;
cca3974e 661 unsigned long flags;
1da177e4
LT		 662 unsigned long pio_mask;
663 unsigned long mwdma_mask;
664 unsigned long udma_mask;
057ace5e 665 const struct ata_port_operations *port_ops;
e99f8b5e 666 void *private_data;
1da177e4
LT		 667};
668
452503f9
AC		 669struct ata_timing {
670 unsigned short mode; /* ATA mode */
671 unsigned short setup; /* t1 */
672 unsigned short act8b; /* t2 for 8-bit I/O */
673 unsigned short rec8b; /* t2i for 8-bit I/O */
674 unsigned short cyc8b; /* t0 for 8-bit I/O */
675 unsigned short active; /* t2 or tD */
676 unsigned short recover; /* t2i or tK */
677 unsigned short cycle; /* t0 */
678 unsigned short udma; /* t2CYCTYP/2 */
679};
680
681#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
1da177e4 682
e9c83914
TH		 683extern const unsigned long sata_deb_timing_normal[];
684extern const unsigned long sata_deb_timing_hotplug[];
685extern const unsigned long sata_deb_timing_long[];
686
dd5b06c4
TH		 687extern const struct ata_port_operations ata_dummy_port_ops;
688
e9c83914
TH		 689static inline const unsigned long *
690sata_ehc_deb_timing(struct ata_eh_context *ehc)
691{
692 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
693 return sata_deb_timing_hotplug;
694 else
695 return sata_deb_timing_normal;
696}
d7bb4cc7 697
dd5b06c4
TH		 698static inline int ata_port_is_dummy(struct ata_port *ap)
699{
700 return ap->ops == &ata_dummy_port_ops;
701}
702
1da177e4
LT		 703extern void ata_port_probe(struct ata_port *);
704extern void __sata_phy_reset(struct ata_port *ap);
705extern void sata_phy_reset(struct ata_port *ap);
706extern void ata_bus_reset(struct ata_port *ap);
3c567b7d 707extern int sata_set_spd(struct ata_port *ap);
d7bb4cc7
TH		 708extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
709extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
f5914a46 710extern int ata_std_prereset(struct ata_port *ap);
2bf2cb26 711extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
b6103f6d
TH		 712extern int sata_port_hardreset(struct ata_port *ap,
713 const unsigned long *timing);
2bf2cb26 714extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
c2bd5804 715extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
1da177e4
LT		 716extern void ata_port_disable(struct ata_port *);
717extern void ata_std_ports(struct ata_ioports *ioaddr);
718#ifdef CONFIG_PCI
719extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
720 unsigned int n_ports);
721extern void ata_pci_remove_one (struct pci_dev *pdev);
3c5100c1 722extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
553c4aa6 723extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
3c5100c1 724extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
9b847548 725extern int ata_pci_device_resume(struct pci_dev *pdev);
17bb34a3 726extern int ata_pci_clear_simplex(struct pci_dev *pdev);
1da177e4 727#endif /* CONFIG_PCI */
057ace5e 728extern int ata_device_add(const struct ata_probe_ent *ent);
0529c159 729extern void ata_host_detach(struct ata_host *host);
cca3974e
JG		 730extern void ata_host_init(struct ata_host *, struct device *,
731 unsigned long, const struct ata_port_operations *);
193515d5 732extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 733extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
734extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
80289167 735extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 736extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 737 struct ata_port_info *, struct Scsi_Host *);
738extern int ata_sas_port_init(struct ata_port *);
739extern int ata_sas_port_start(struct ata_port *ap);
740extern void ata_sas_port_stop(struct ata_port *ap);
741extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
742extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
743 struct ata_port *ap);
1da177e4 744extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
34bf2170
TH		 745extern int sata_scr_valid(struct ata_port *ap);
746extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
747extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
748extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
749extern int ata_port_online(struct ata_port *ap);
750extern int ata_port_offline(struct ata_port *ap);
9b847548 751extern int ata_scsi_device_resume(struct scsi_device *);
3c5100c1 752extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
cca3974e
JG		 753extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
754extern void ata_host_resume(struct ata_host *host);
67846b30 755extern int ata_ratelimit(void);
d1adc1bb
TH		 756extern int ata_busy_sleep(struct ata_port *ap,
757 unsigned long timeout_pat, unsigned long timeout);
65f27f38 758extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
86e45b6b 759 void *data, unsigned long delay);
c22daff4
TH		 760extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
761 unsigned long interval_msec,
762 unsigned long timeout_msec);
a619f981 763extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
67846b30 764
1da177e4
LT		 765/*
766 * Default driver ops implementations
767 */
057ace5e 768extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 769extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
057ace5e
JG		 770extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
771extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1da177e4
LT		 772extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
773extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
774extern u8 ata_check_status(struct ata_port *ap);
775extern u8 ata_altstatus(struct ata_port *ap);
057ace5e 776extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 777extern int ata_port_start (struct ata_port *ap);
7d12e780 778extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
0d5ff566
TH		 779extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
780 unsigned int buflen, int write_data);
781extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
782 unsigned int buflen, int write_data);
1da177e4 783extern void ata_qc_prep(struct ata_queued_cmd *qc);
e46834cd 784extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
9a3d9eb0 785extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
1da177e4
LT		 786extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
787 unsigned int buflen);
788extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
789 unsigned int n_elem);
057ace5e 790extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
6a62a04d
TH		 791extern void ata_id_string(const u16 *id, unsigned char *s,
792 unsigned int ofs, unsigned int len);
793extern void ata_id_c_string(const u16 *id, unsigned char *s,
794 unsigned int ofs, unsigned int len);
6919a0a6 795extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
1da177e4
LT		 796extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
797extern void ata_bmdma_start (struct ata_queued_cmd *qc);
b73fc89f 798extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 799extern u8 ata_bmdma_status(struct ata_port *ap);
800extern void ata_bmdma_irq_clear(struct ata_port *ap);
6d97dbd7
TH		 801extern void ata_bmdma_freeze(struct ata_port *ap);
802extern void ata_bmdma_thaw(struct ata_port *ap);
f5914a46 803extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
6d97dbd7
TH		 804 ata_reset_fn_t softreset,
805 ata_reset_fn_t hardreset,
806 ata_postreset_fn_t postreset);
807extern void ata_bmdma_error_handler(struct ata_port *ap);
808extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
9a1004d0
TH		 809extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
810 u8 status, int in_wq);
f686bcb8 811extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 812extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
813 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 814extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 815 void (*done)(struct scsi_cmnd *));
816extern int ata_std_bios_param(struct scsi_device *sdev,
817 struct block_device *bdev,
818 sector_t capacity, int geom[]);
819extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 820extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 821extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
822 int queue_depth);
3373efd8 823extern struct ata_device *ata_dev_pair(struct ata_device *adev);
83625006
AI		 824extern u8 ata_irq_on(struct ata_port *ap);
825extern u8 ata_dummy_irq_on(struct ata_port *ap);
826extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
827extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
1da177e4 828
452503f9
AC		 829/*
830 * Timing helpers
831 */
1bc4ccff
AC		 832
833extern unsigned int ata_pio_need_iordy(const struct ata_device *);
452503f9
AC		 834extern int ata_timing_compute(struct ata_device *, unsigned short,
835 struct ata_timing *, int, int);
836extern void ata_timing_merge(const struct ata_timing *,
837 const struct ata_timing *, struct ata_timing *,
838 unsigned int);
839
840enum {
841 ATA_TIMING_SETUP = (1 << 0),
842 ATA_TIMING_ACT8B = (1 << 1),
843 ATA_TIMING_REC8B = (1 << 2),
844 ATA_TIMING_CYC8B = (1 << 3),
845 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
846 ATA_TIMING_CYC8B,
847 ATA_TIMING_ACTIVE = (1 << 4),
848 ATA_TIMING_RECOVER = (1 << 5),
849 ATA_TIMING_CYCLE = (1 << 6),
850 ATA_TIMING_UDMA = (1 << 7),
851 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
852 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
853 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
854 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
855};
856
1da177e4
LT		 857
858#ifdef CONFIG_PCI
859struct pci_bits {
860 unsigned int reg; /* PCI config register to read */
861 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
862 unsigned long mask;
863 unsigned long val;
864};
865
866extern struct ata_probe_ent *
47a86593 867ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
057ace5e 868extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
17bb34a3 869extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
1da177e4
LT		 870#endif /* CONFIG_PCI */
871
ece1d636
TH		 872/*
873 * EH
874 */
ece1d636 875extern void ata_eng_timeout(struct ata_port *ap);
7b70fc03
TH		 876
877extern void ata_port_schedule_eh(struct ata_port *ap);
878extern int ata_port_abort(struct ata_port *ap);
e3180499
TH		 879extern int ata_port_freeze(struct ata_port *ap);
880
881extern void ata_eh_freeze_port(struct ata_port *ap);
882extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 883
ece1d636
TH		 884extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
885extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
886
f5914a46
TH		 887extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
888 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
889 ata_postreset_fn_t postreset);
022bdb07 890
61440db6
TH		 891/*
892 * printk helpers
893 */
894#define ata_port_printk(ap, lv, fmt, args...) \
895 printk(lv"ata%u: "fmt, (ap)->id , ##args)
896
897#define ata_dev_printk(dev, lv, fmt, args...) \
898 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
1da177e4 899
f3e81b19
TH		 900/*
901 * ata_eh_info helpers
902 */
903#define ata_ehi_push_desc(ehi, fmt, args...) do { \
904 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
905 ATA_EH_DESC_LEN - (ehi)->desc_len, \
906 fmt , ##args); \
907} while (0)
908
909#define ata_ehi_clear_desc(ehi) do { \
910 (ehi)->desc[0] = '\0'; \
911 (ehi)->desc_len = 0; \
912} while (0)
913
c0b6c037 914static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
084fe639
TH		 915{
916 if (ehi->flags & ATA_EHI_HOTPLUGGED)
917 return;
918
28324304 919 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
084fe639
TH		 920 ehi->hotplug_timestamp = jiffies;
921
084fe639
TH		 922 ehi->action |= ATA_EH_SOFTRESET;
923 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
924}
925
c0b6c037
TH		 926static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
927{
928 __ata_ehi_hotplugged(ehi);
929 ehi->err_mask |= AC_ERR_ATA_BUS;
930}
931
61440db6
TH		 932/*
933 * qc helpers
934 */
972c26bd
JG		 935static inline int
936ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
937{
938 if (sg == &qc->pad_sgent)
939 return 1;
940 if (qc->pad_len)
941 return 0;
942 if (((sg - qc->__sg) + 1) == qc->n_elem)
943 return 1;
944 return 0;
945}
946
cc1887f3
TH		 947static inline struct scatterlist *
948ata_qc_first_sg(struct ata_queued_cmd *qc)
949{
950 if (qc->n_elem)
951 return qc->__sg;
952 if (qc->pad_len)
953 return &qc->pad_sgent;
954 return NULL;
955}
956
cedc9a47
JG		 957static inline struct scatterlist *
958ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
959{
960 if (sg == &qc->pad_sgent)
961 return NULL;
962 if (++sg - qc->__sg < qc->n_elem)
963 return sg;
cc1887f3
TH		 964 if (qc->pad_len)
965 return &qc->pad_sgent;
966 return NULL;
cedc9a47
JG		 967}
968
969#define ata_for_each_sg(sg, qc) \
cc1887f3 970 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
cedc9a47 971
1da177e4
LT		 972static inline unsigned int ata_tag_valid(unsigned int tag)
973{
974 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
975}
976
2ab7db1f
TH		 977static inline unsigned int ata_tag_internal(unsigned int tag)
978{
979 return tag == ATA_MAX_QUEUE - 1;
980}
981
5806db22
TH		 982/*
983 * device helpers
984 */
e1211e3f 985static inline unsigned int ata_class_enabled(unsigned int class)
597afd21
TH		 986{
987 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
988}
989
e1211e3f 990static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 991{
e1211e3f
TH		 992 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
993}
994
002c8054
TH		 995static inline unsigned int ata_class_absent(unsigned int class)
996{
997 return !ata_class_enabled(class) && !ata_class_disabled(class);
998}
999
e1211e3f
TH		 1000static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1001{
1002 return ata_class_enabled(dev->class);
1003}
1004
1005static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1006{
1007 return ata_class_disabled(dev->class);
1da177e4
LT		 1008}
1009
002c8054
TH		 1010static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1011{
1012 return ata_class_absent(dev->class);
1013}
1014
02670bf3
TH		 1015static inline unsigned int ata_dev_ready(const struct ata_device *dev)
1016{
1017 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
1018}
1019
5806db22
TH		 1020/*
1021 * port helpers
1022 */
1023static inline int ata_port_max_devices(const struct ata_port *ap)
1024{
1025 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1026 return 2;
1027 return 1;
1028}
1029
1030
1da177e4
LT		 1031static inline u8 ata_chk_status(struct ata_port *ap)
1032{
1033 return ap->ops->check_status(ap);
1034}
1035
6d1245bf
TH		 1036/**
1037 * ata_ncq_enabled - Test whether NCQ is enabled
1038 * @dev: ATA device to test for
1039 *
1040 * LOCKING:
1041 * spin_lock_irqsave(host lock)
1042 *
1043 * RETURNS:
1044 * 1 if NCQ is enabled for @dev, 0 otherwise.
1045 */
1046static inline int ata_ncq_enabled(struct ata_device *dev)
1047{
1048 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1049 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1050}
0baab86b
EF		 1051
1052/**
1053 * ata_pause - Flush writes and pause 400 nanoseconds.
1054 * @ap: Port to wait for.
1055 *
1056 * LOCKING:
1057 * Inherited from caller.
1058 */
1059
1da177e4
LT		 1060static inline void ata_pause(struct ata_port *ap)
1061{
1062 ata_altstatus(ap);
1063 ndelay(400);
1064}
1065
0baab86b
EF		 1066
1067/**
1068 * ata_busy_wait - Wait for a port status register
1069 * @ap: Port to wait for.
0777721c
A		 1070 * @bits: bits that must be clear
1071 * @max: number of 10uS waits to perform
0baab86b
EF		 1072 *
1073 * Waits up to max*10 microseconds for the selected bits in the port's
1074 * status register to be cleared.
1075 * Returns final value of status register.
1076 *
1077 * LOCKING:
1078 * Inherited from caller.
1079 */
1080
1da177e4
LT		 1081static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1082 unsigned int max)
1083{
1084 u8 status;
1085
1086 do {
1087 udelay(10);
1088 status = ata_chk_status(ap);
1089 max--;
d1adc1bb 1090 } while (status != 0xff && (status & bits) && (max > 0));
1da177e4
LT		 1091
1092 return status;
1093}
1094
0baab86b
EF		 1095
1096/**
1097 * ata_wait_idle - Wait for a port to be idle.
1098 * @ap: Port to wait for.
1099 *
1100 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1101 * Returns final value of status register.
1102 *
1103 * LOCKING:
1104 * Inherited from caller.
1105 */
1106
1da177e4
LT		 1107static inline u8 ata_wait_idle(struct ata_port *ap)
1108{
1109 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1110
d1adc1bb 1111 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
bfd60579 1112 if (ata_msg_warn(ap))
0d5ff566
TH		 1113 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n",
1114 status, ap->ioaddr.status_addr);
1da177e4
LT		 1115 }
1116
1117 return status;
1118}
1119
1120static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1121{
1122 qc->tf.ctl |= ATA_NIEN;
1123}
1124
f69499f4
TH		 1125static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1126 unsigned int tag)
1da177e4
LT		 1127{
1128 if (likely(ata_tag_valid(tag)))
1129 return &ap->qcmd[tag];
1130 return NULL;
1131}
1132
f69499f4
TH		 1133static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1134 unsigned int tag)
1135{
1136 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1137
1138 if (unlikely(!qc) || !ap->ops->error_handler)
1139 return qc;
1140
1141 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1142 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1143 return qc;
1144
1145 return NULL;
1146}
1147
3373efd8 1148static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1149{
1150 memset(tf, 0, sizeof(*tf));
1151
3373efd8
TH		 1152 tf->ctl = dev->ap->ctl;
1153 if (dev->devno == 0)
1da177e4
LT		 1154 tf->device = ATA_DEVICE_OBS;
1155 else
1156 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1157}
1158
2c13b7ce
JG		 1159static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1160{
501e0c50 1161 qc->dma_dir = DMA_NONE;
2c13b7ce
JG		 1162 qc->__sg = NULL;
1163 qc->flags = 0;
726f0785 1164 qc->cursg = qc->cursg_ofs = 0;
2c13b7ce 1165 qc->nbytes = qc->curbytes = 0;
7a801184 1166 qc->n_elem = 0;
a22e2eb0 1167 qc->err_mask = 0;
d0f29485 1168 qc->pad_len = 0;
2c13b7ce 1169
3373efd8 1170 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1171
1172 /* init result_tf such that it indicates normal completion */
1173 qc->result_tf.command = ATA_DRDY;
1174 qc->result_tf.feature = 0;
2c13b7ce
JG		 1175}
1176
057ace5e 1177static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1178{
1179 return ata_id_wcache_enabled(dev->id) ||
1180 ata_id_has_flush(dev->id) ||
1181 ata_id_has_flush_ext(dev->id);
1182}
1183
a7dac447
JG		 1184static inline unsigned int ac_err_mask(u8 status)
1185{
3655d1d3 1186 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1187 return AC_ERR_HSM;
a7dac447
JG		 1188 if (status & (ATA_ERR | ATA_DF))
1189 return AC_ERR_DEV;
1190 return 0;
1191}
1192
1193static inline unsigned int __ac_err_mask(u8 status)
1194{
1195 unsigned int mask = ac_err_mask(status);
1196 if (mask == 0)
1197 return AC_ERR_OTHER;
1198 return mask;
1199}
1200
6037d6bb
JG		 1201static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1202{
1203 ap->pad_dma = 0;
f0d36efd
TH		 1204 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1205 &ap->pad_dma, GFP_KERNEL);
6037d6bb
JG		 1206 return (ap->pad == NULL) ? -ENOMEM : 0;
1207}
1208
1209static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1210{
f0d36efd 1211 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
6037d6bb
JG		 1212}
1213
35bb94b1
JG		 1214static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1215{
1216 return (struct ata_port *) &host->hostdata[0];
1217}
1218
1da177e4 1219#endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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