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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeff Garzikaf36d7f2005-08-28 20:18:39 -04002 * 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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070024 */
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>
Andrew Morton1c72d8d2005-11-10 16:21:38 -080032#include <linux/dma-mapping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <asm/io.h>
34#include <linux/ata.h>
35#include <linux/workqueue.h>
36
37/*
Randy Dunlapbfd60572006-01-17 19:34:42 -050038 * compile-time options: to be removed as soon as all the drivers are
39 * converted to the new debugging mechanism
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 */
41#undef ATA_DEBUG /* debugging output */
42#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
43#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
44#undef ATA_NDEBUG /* define to disable quick runtime checks */
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#undef ATA_ENABLE_PATA /* define to enable PATA support in some
46 * low-level drivers */
47#undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */
48
49
50/* note: prints function name for you */
51#ifdef ATA_DEBUG
52#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
53#ifdef ATA_VERBOSE_DEBUG
54#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
55#else
56#define VPRINTK(fmt, args...)
57#endif /* ATA_VERBOSE_DEBUG */
58#else
59#define DPRINTK(fmt, args...)
60#define VPRINTK(fmt, args...)
61#endif /* ATA_DEBUG */
62
Jeff Garzik2c13b7c2005-11-14 14:14:16 -050063#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
64
Randy Dunlapbfd60572006-01-17 19:34:42 -050065/* NEW: debug levels */
66#define HAVE_LIBATA_MSG 1
67
68enum {
69 ATA_MSG_DRV = 0x0001,
70 ATA_MSG_INFO = 0x0002,
71 ATA_MSG_PROBE = 0x0004,
72 ATA_MSG_WARN = 0x0008,
73 ATA_MSG_MALLOC = 0x0010,
74 ATA_MSG_CTL = 0x0020,
75 ATA_MSG_INTR = 0x0040,
76 ATA_MSG_ERR = 0x0080,
77};
78
79#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
80#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
81#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
82#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
83#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
84#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
85#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
86#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
87
88static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
89{
90 if (dval < 0 || dval >= (sizeof(u32) * 8))
91 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
92 if (!dval)
93 return 0;
94 return (1 << dval) - 1;
95}
96
Linus Torvalds1da177e2005-04-16 15:20:36 -070097/* defines only for the constants which don't work well as enums */
98#define ATA_TAG_POISON 0xfafbfcfdU
99
100/* move to PCI layer? */
101static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
102{
103 return &pdev->dev;
104}
105
106enum {
107 /* various global constants */
108 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
109 ATA_MAX_PORTS = 8,
110 ATA_DEF_QUEUE = 1,
111 ATA_MAX_QUEUE = 1,
112 ATA_MAX_SECTORS = 200, /* FIXME */
113 ATA_MAX_BUS = 2,
114 ATA_DEF_BUSY_WAIT = 10000,
115 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
116
117 ATA_SHT_EMULATED = 1,
118 ATA_SHT_CMD_PER_LUN = 1,
119 ATA_SHT_THIS_ID = -1,
Jeff Garzikcf482932005-10-22 00:19:33 -0400120 ATA_SHT_USE_CLUSTERING = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122 /* struct ata_device stuff */
123 ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */
124 ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */
Tejun Heob00eec12006-02-12 23:32:59 +0900125 ATA_DFLAG_LBA = (1 << 2), /* device supports LBA */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127 ATA_DEV_UNKNOWN = 0, /* unknown device */
128 ATA_DEV_ATA = 1, /* ATA device */
129 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
130 ATA_DEV_ATAPI = 3, /* ATAPI device */
131 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
132 ATA_DEV_NONE = 5, /* no device */
133
134 /* struct ata_port flags */
135 ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */
136 /* (doesn't imply presence) */
137 ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */
138 ATA_FLAG_SATA = (1 << 3),
139 ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */
Tejun Heoc19ba8a2006-01-24 17:05:22 +0900140 ATA_FLAG_SRST = (1 << 5), /* (obsolete) use ATA SRST, not E.D.D. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */
Tejun Heoc19ba8a2006-01-24 17:05:22 +0900142 ATA_FLAG_SATA_RESET = (1 << 7), /* (obsolete) use COMRESET */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */
Tejun Heoc1389502005-08-22 14:59:24 +0900144 ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once
145 * proper HSM is in place. */
Jeff Garzik2c13b7c2005-11-14 14:14:16 -0500146 ATA_FLAG_DEBUGMSG = (1 << 10),
Jeff Garzik50630192005-12-13 02:29:45 -0500147 ATA_FLAG_NO_ATAPI = (1 << 11), /* No ATAPI support */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Jens Axboe9b847542006-01-06 09:28:07 +0100149 ATA_FLAG_SUSPENDED = (1 << 12), /* port is suspended */
150
Alan Cox8d238e02006-01-17 20:50:31 +0000151 ATA_FLAG_PIO_LBA48 = (1 << 13), /* Host DMA engine is LBA28 only */
152 ATA_FLAG_IRQ_MASK = (1 << 14), /* Mask IRQ in PIO xfers */
153
Tejun Heo2e755f62006-03-05 15:29:09 +0900154 ATA_FLAG_FLUSH_PORT_TASK = (1 << 15), /* Flush port task */
Tejun Heoc18d06f2006-02-02 00:56:10 +0900155 ATA_FLAG_IN_EH = (1 << 16), /* EH in progress */
Tejun Heodde44582006-02-02 00:56:10 +0900156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */
158 ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */
159 ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */
160 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
Tejun Heo341963b2006-02-10 15:10:48 +0900161 ATA_QCFLAG_EH_SCHEDULED = (1 << 5), /* EH scheduled */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 /* various lengths of time */
Alan Cox8d238e02006-01-17 20:50:31 +0000164 ATA_TMOUT_EDD = 5 * HZ, /* heuristic */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 ATA_TMOUT_PIO = 30 * HZ,
Alan Cox8d238e02006-01-17 20:50:31 +0000166 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
167 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 ATA_TMOUT_CDB = 30 * HZ,
169 ATA_TMOUT_CDB_QUICK = 5 * HZ,
Tejun Heoa2a7a662005-12-13 14:48:31 +0900170 ATA_TMOUT_INTERNAL = 30 * HZ,
171 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
173 /* ATA bus states */
174 BUS_UNKNOWN = 0,
175 BUS_DMA = 1,
176 BUS_IDLE = 2,
177 BUS_NOINTR = 3,
178 BUS_NODATA = 4,
179 BUS_TIMER = 5,
180 BUS_PIO = 6,
181 BUS_EDD = 7,
182 BUS_IDENTIFY = 8,
183 BUS_PACKET = 9,
184
185 /* SATA port states */
186 PORT_UNKNOWN = 0,
187 PORT_ENABLED = 1,
188 PORT_DISABLED = 2,
189
190 /* encoding various smaller bitmaps into a single
191 * unsigned long bitmap
192 */
193 ATA_SHIFT_UDMA = 0,
194 ATA_SHIFT_MWDMA = 8,
195 ATA_SHIFT_PIO = 11,
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400196
197 /* size of buffer to pad xfers ending on unaligned boundaries */
198 ATA_DMA_PAD_SZ = 4,
199 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
Alan Cox47a86592005-10-04 08:09:19 -0400200
201 /* Masks for port functions */
202 ATA_PORT_PRIMARY = (1 << 0),
203 ATA_PORT_SECONDARY = (1 << 1),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204};
205
Albert Lee14be71f2005-09-27 17:36:35 +0800206enum hsm_task_states {
207 HSM_ST_UNKNOWN,
208 HSM_ST_IDLE,
209 HSM_ST_POLL,
210 HSM_ST_TMOUT,
211 HSM_ST,
212 HSM_ST_LAST,
213 HSM_ST_LAST_POLL,
214 HSM_ST_ERR,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215};
216
Jeff Garzika7dac442005-10-30 04:44:42 -0500217enum ata_completion_errors {
Tejun Heo11a56d22006-01-23 13:09:36 +0900218 AC_ERR_DEV = (1 << 0), /* device reported error */
219 AC_ERR_HSM = (1 << 1), /* host state machine violation */
220 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
221 AC_ERR_MEDIA = (1 << 3), /* media error */
222 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
223 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
224 AC_ERR_SYSTEM = (1 << 6), /* system error */
225 AC_ERR_INVALID = (1 << 7), /* invalid argument */
226 AC_ERR_OTHER = (1 << 8), /* unknown */
Jeff Garzika7dac442005-10-30 04:44:42 -0500227};
228
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229/* forward declarations */
230struct scsi_device;
231struct ata_port_operations;
232struct ata_port;
233struct ata_queued_cmd;
234
235/* typedefs */
Tejun Heo77853bf2006-01-23 13:09:36 +0900236typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
Tejun Heo7944ea92006-02-02 18:20:00 +0900237typedef void (*ata_probeinit_fn_t)(struct ata_port *);
Tejun Heoa62c0fc2006-01-24 17:05:22 +0900238typedef int (*ata_reset_fn_t)(struct ata_port *, int, unsigned int *);
239typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
241struct ata_ioports {
242 unsigned long cmd_addr;
243 unsigned long data_addr;
244 unsigned long error_addr;
245 unsigned long feature_addr;
246 unsigned long nsect_addr;
247 unsigned long lbal_addr;
248 unsigned long lbam_addr;
249 unsigned long lbah_addr;
250 unsigned long device_addr;
251 unsigned long status_addr;
252 unsigned long command_addr;
253 unsigned long altstatus_addr;
254 unsigned long ctl_addr;
255 unsigned long bmdma_addr;
256 unsigned long scr_addr;
257};
258
259struct ata_probe_ent {
260 struct list_head node;
261 struct device *dev;
Jeff Garzik057ace52005-10-22 14:27:05 -0400262 const struct ata_port_operations *port_ops;
Jeff Garzik193515d2005-11-07 00:59:37 -0500263 struct scsi_host_template *sht;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 struct ata_ioports port[ATA_MAX_PORTS];
265 unsigned int n_ports;
266 unsigned int hard_port_no;
267 unsigned int pio_mask;
268 unsigned int mwdma_mask;
269 unsigned int udma_mask;
270 unsigned int legacy_mode;
271 unsigned long irq;
272 unsigned int irq_flags;
273 unsigned long host_flags;
274 void __iomem *mmio_base;
275 void *private_data;
276};
277
278struct ata_host_set {
279 spinlock_t lock;
280 struct device *dev;
281 unsigned long irq;
282 void __iomem *mmio_base;
283 unsigned int n_ports;
284 void *private_data;
Jeff Garzik057ace52005-10-22 14:27:05 -0400285 const struct ata_port_operations *ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 struct ata_port * ports[0];
287};
288
289struct ata_queued_cmd {
290 struct ata_port *ap;
291 struct ata_device *dev;
292
293 struct scsi_cmnd *scsicmd;
294 void (*scsidone)(struct scsi_cmnd *);
295
296 struct ata_taskfile tf;
297 u8 cdb[ATAPI_CDB_LEN];
298
299 unsigned long flags; /* ATA_QCFLAG_xxx */
300 unsigned int tag;
301 unsigned int n_elem;
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400302 unsigned int orig_n_elem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304 int dma_dir;
305
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400306 unsigned int pad_len;
307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 unsigned int nsect;
309 unsigned int cursect;
310
311 unsigned int nbytes;
312 unsigned int curbytes;
313
314 unsigned int cursg;
315 unsigned int cursg_ofs;
316
317 struct scatterlist sgent;
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400318 struct scatterlist pad_sgent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 void *buf_virt;
320
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400321 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
322 struct scatterlist *__sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
Albert Leea22e2eb2005-12-05 15:38:02 +0800324 unsigned int err_mask;
325
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 ata_qc_cb_t complete_fn;
327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 void *private_data;
329};
330
331struct ata_host_stats {
332 unsigned long unhandled_irq;
333 unsigned long idle_irq;
334 unsigned long rw_reqbuf;
335};
336
337struct ata_device {
338 u64 n_sectors; /* size of device, if ATA */
339 unsigned long flags; /* ATA_DFLAG_xxx */
340 unsigned int class; /* ATA_DEV_xxx */
341 unsigned int devno; /* 0 or 1 */
Tejun Heod9572b12006-03-01 16:09:35 +0900342 u16 *id; /* IDENTIFY xxx DEVICE data */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 u8 pio_mode;
344 u8 dma_mode;
345 u8 xfer_mode;
346 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
347
Albert Lee8cbd6df2005-10-12 15:06:27 +0800348 unsigned int multi_count; /* sectors count for
349 READ/WRITE MULTIPLE */
Tejun Heob00eec12006-02-12 23:32:59 +0900350 unsigned int max_sectors; /* per-device max sectors */
Tejun Heo6e7846e2006-02-12 23:32:58 +0900351 unsigned int cdb_len;
Albert Lee8bf62ece2005-05-12 15:29:42 -0400352
353 /* for CHS addressing */
354 u16 cylinders; /* Number of cylinders */
355 u16 heads; /* Number of heads */
356 u16 sectors; /* Number of sectors per track */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357};
358
359struct ata_port {
360 struct Scsi_Host *host; /* our co-allocated scsi host */
Jeff Garzik057ace52005-10-22 14:27:05 -0400361 const struct ata_port_operations *ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 unsigned long flags; /* ATA_FLAG_xxx */
363 unsigned int id; /* unique id req'd by scsi midlyr */
364 unsigned int port_no; /* unique port #; from zero */
365 unsigned int hard_port_no; /* hardware port #; from zero */
366
367 struct ata_prd *prd; /* our SG list */
368 dma_addr_t prd_dma; /* and its DMA mapping */
369
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400370 void *pad; /* array of DMA pad buffers */
371 dma_addr_t pad_dma;
372
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
374
375 u8 ctl; /* cache of ATA control register */
376 u8 last_ctl; /* Cache last written value */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 unsigned int pio_mask;
378 unsigned int mwdma_mask;
379 unsigned int udma_mask;
380 unsigned int cbl; /* cable type; ATA_CBL_xxx */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
382 struct ata_device device[ATA_MAX_DEVICES];
383
384 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
385 unsigned long qactive;
386 unsigned int active_tag;
387
388 struct ata_host_stats stats;
389 struct ata_host_set *host_set;
390
Tejun Heo86e45b62006-03-05 15:29:09 +0900391 struct work_struct port_task;
392
Albert Lee14be71f2005-09-27 17:36:35 +0800393 unsigned int hsm_task_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 unsigned long pio_task_timeout;
395
Randy Dunlapbfd60572006-01-17 19:34:42 -0500396 u32 msg_enable;
Tejun Heoa72ec4c2006-01-23 13:09:37 +0900397 struct list_head eh_done_q;
Randy Dunlapbfd60572006-01-17 19:34:42 -0500398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 void *private_data;
400};
401
402struct ata_port_operations {
403 void (*port_disable) (struct ata_port *);
404
405 void (*dev_config) (struct ata_port *, struct ata_device *);
406
407 void (*set_piomode) (struct ata_port *, struct ata_device *);
408 void (*set_dmamode) (struct ata_port *, struct ata_device *);
409
Jeff Garzik057ace52005-10-22 14:27:05 -0400410 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
412
Jeff Garzik057ace52005-10-22 14:27:05 -0400413 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 u8 (*check_status)(struct ata_port *ap);
415 u8 (*check_altstatus)(struct ata_port *ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 void (*dev_select)(struct ata_port *ap, unsigned int device);
417
Tejun Heoc19ba8a2006-01-24 17:05:22 +0900418 void (*phy_reset) (struct ata_port *ap); /* obsolete */
419 int (*probe_reset) (struct ata_port *ap, unsigned int *classes);
420
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 void (*post_set_mode) (struct ata_port *ap);
422
423 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
424
425 void (*bmdma_setup) (struct ata_queued_cmd *qc);
426 void (*bmdma_start) (struct ata_queued_cmd *qc);
427
428 void (*qc_prep) (struct ata_queued_cmd *qc);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +0900429 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431 void (*eng_timeout) (struct ata_port *ap);
432
433 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
434 void (*irq_clear) (struct ata_port *);
435
436 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
437 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
438 u32 val);
439
440 int (*port_start) (struct ata_port *ap);
441 void (*port_stop) (struct ata_port *ap);
442
443 void (*host_stop) (struct ata_host_set *host_set);
444
Alan Coxb73fc892005-08-26 16:03:19 +0100445 void (*bmdma_stop) (struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 u8 (*bmdma_status) (struct ata_port *ap);
447};
448
449struct ata_port_info {
Christoph Hellwigd0be4a7d2005-10-31 18:31:40 +0100450 struct scsi_host_template *sht;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 unsigned long host_flags;
452 unsigned long pio_mask;
453 unsigned long mwdma_mask;
454 unsigned long udma_mask;
Jeff Garzik057ace52005-10-22 14:27:05 -0400455 const struct ata_port_operations *port_ops;
Alan Coxe99f8b52005-11-08 14:09:44 +0000456 void *private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457};
458
Alan Cox452503f2005-10-21 19:01:32 -0400459struct ata_timing {
460 unsigned short mode; /* ATA mode */
461 unsigned short setup; /* t1 */
462 unsigned short act8b; /* t2 for 8-bit I/O */
463 unsigned short rec8b; /* t2i for 8-bit I/O */
464 unsigned short cyc8b; /* t0 for 8-bit I/O */
465 unsigned short active; /* t2 or tD */
466 unsigned short recover; /* t2i or tK */
467 unsigned short cycle; /* t0 */
468 unsigned short udma; /* t2CYCTYP/2 */
469};
470
471#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
473extern void ata_port_probe(struct ata_port *);
474extern void __sata_phy_reset(struct ata_port *ap);
475extern void sata_phy_reset(struct ata_port *ap);
476extern void ata_bus_reset(struct ata_port *ap);
Tejun Heoa62c0fc2006-01-24 17:05:22 +0900477extern int ata_drive_probe_reset(struct ata_port *ap,
Tejun Heo7944ea92006-02-02 18:20:00 +0900478 ata_probeinit_fn_t probeinit,
Tejun Heoa62c0fc2006-01-24 17:05:22 +0900479 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
480 ata_postreset_fn_t postreset, unsigned int *classes);
Tejun Heo8a19ac82006-02-02 18:20:00 +0900481extern void ata_std_probeinit(struct ata_port *ap);
Tejun Heoc2bd5802006-01-24 17:05:22 +0900482extern int ata_std_softreset(struct ata_port *ap, int verbose,
483 unsigned int *classes);
484extern int sata_std_hardreset(struct ata_port *ap, int verbose,
485 unsigned int *class);
486extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
Tejun Heo623a3122006-03-05 17:55:58 +0900487extern int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
488 int post_reset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489extern void ata_port_disable(struct ata_port *);
490extern void ata_std_ports(struct ata_ioports *ioaddr);
491#ifdef CONFIG_PCI
492extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
493 unsigned int n_ports);
494extern void ata_pci_remove_one (struct pci_dev *pdev);
Jens Axboe9b847542006-01-06 09:28:07 +0100495extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
496extern int ata_pci_device_resume(struct pci_dev *pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497#endif /* CONFIG_PCI */
Jeff Garzik057ace52005-10-22 14:27:05 -0400498extern int ata_device_add(const struct ata_probe_ent *ent);
Alan Cox17b14452005-09-15 15:44:00 +0100499extern void ata_host_set_remove(struct ata_host_set *host_set);
Jeff Garzik193515d2005-11-07 00:59:37 -0500500extern int ata_scsi_detect(struct scsi_host_template *sht);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
502extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
Tejun Heof29841e2006-02-10 15:10:48 +0900503extern enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504extern int ata_scsi_error(struct Scsi_Host *host);
Tejun Heoa72ec4c2006-01-23 13:09:37 +0900505extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
506extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507extern int ata_scsi_release(struct Scsi_Host *host);
508extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
Jens Axboe9b847542006-01-06 09:28:07 +0100509extern int ata_scsi_device_resume(struct scsi_device *);
510extern int ata_scsi_device_suspend(struct scsi_device *);
511extern int ata_device_resume(struct ata_port *, struct ata_device *);
512extern int ata_device_suspend(struct ata_port *, struct ata_device *);
Jeff Garzik67846b32005-10-05 02:58:32 -0400513extern int ata_ratelimit(void);
Tejun Heo6f8b9952006-01-24 17:05:21 +0900514extern unsigned int ata_busy_sleep(struct ata_port *ap,
515 unsigned long timeout_pat,
516 unsigned long timeout);
Tejun Heo86e45b62006-03-05 15:29:09 +0900517extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
518 void *data, unsigned long delay);
Jeff Garzik67846b32005-10-05 02:58:32 -0400519
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520/*
521 * Default driver ops implementations
522 */
Jeff Garzik057ace52005-10-22 14:27:05 -0400523extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
Jeff Garzik057ace52005-10-22 14:27:05 -0400525extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
526extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
528extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
529extern u8 ata_check_status(struct ata_port *ap);
530extern u8 ata_altstatus(struct ata_port *ap);
Jeff Garzik057ace52005-10-22 14:27:05 -0400531extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
Tejun Heoc2bd5802006-01-24 17:05:22 +0900532extern int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533extern int ata_port_start (struct ata_port *ap);
534extern void ata_port_stop (struct ata_port *ap);
Jeff Garzikaa8f0dc2005-05-26 21:54:27 -0400535extern void ata_host_stop (struct ata_host_set *host_set);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
537extern void ata_qc_prep(struct ata_queued_cmd *qc);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +0900538extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
540 unsigned int buflen);
541extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
542 unsigned int n_elem);
Jeff Garzik057ace52005-10-22 14:27:05 -0400543extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
Tejun Heo6a62a042006-02-13 10:02:46 +0900544extern void ata_id_string(const u16 *id, unsigned char *s,
545 unsigned int ofs, unsigned int len);
546extern void ata_id_c_string(const u16 *id, unsigned char *s,
547 unsigned int ofs, unsigned int len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
549extern void ata_bmdma_start (struct ata_queued_cmd *qc);
Alan Coxb73fc892005-08-26 16:03:19 +0100550extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551extern u8 ata_bmdma_status(struct ata_port *ap);
552extern void ata_bmdma_irq_clear(struct ata_port *ap);
Tejun Heo76014422006-02-11 15:13:49 +0900553extern void __ata_qc_complete(struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554extern void ata_eng_timeout(struct ata_port *ap);
Tejun Heo9a3dccc2006-01-06 09:56:18 +0100555extern void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
556 struct scsi_cmnd *cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 void (*done)(struct scsi_cmnd *));
558extern int ata_std_bios_param(struct scsi_device *sdev,
559 struct block_device *bdev,
560 sector_t capacity, int geom[]);
561extern int ata_scsi_slave_config(struct scsi_device *sdev);
562
Alan Cox452503f2005-10-21 19:01:32 -0400563/*
564 * Timing helpers
565 */
Alan Cox1bc4ccf2006-01-09 17:18:14 +0000566
567extern unsigned int ata_pio_need_iordy(const struct ata_device *);
Alan Cox452503f2005-10-21 19:01:32 -0400568extern int ata_timing_compute(struct ata_device *, unsigned short,
569 struct ata_timing *, int, int);
570extern void ata_timing_merge(const struct ata_timing *,
571 const struct ata_timing *, struct ata_timing *,
572 unsigned int);
573
574enum {
575 ATA_TIMING_SETUP = (1 << 0),
576 ATA_TIMING_ACT8B = (1 << 1),
577 ATA_TIMING_REC8B = (1 << 2),
578 ATA_TIMING_CYC8B = (1 << 3),
579 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
580 ATA_TIMING_CYC8B,
581 ATA_TIMING_ACTIVE = (1 << 4),
582 ATA_TIMING_RECOVER = (1 << 5),
583 ATA_TIMING_CYCLE = (1 << 6),
584 ATA_TIMING_UDMA = (1 << 7),
585 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
586 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
587 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
588 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
589};
590
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
592#ifdef CONFIG_PCI
593struct pci_bits {
594 unsigned int reg; /* PCI config register to read */
595 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
596 unsigned long mask;
597 unsigned long val;
598};
599
Jeff Garzik374b1872005-08-30 05:42:52 -0400600extern void ata_pci_host_stop (struct ata_host_set *host_set);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601extern struct ata_probe_ent *
Alan Cox47a86592005-10-04 08:09:19 -0400602ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
Jeff Garzik057ace52005-10-22 14:27:05 -0400603extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
605#endif /* CONFIG_PCI */
606
607
Jeff Garzik972c26b2005-10-18 22:14:54 -0400608static inline int
609ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
610{
611 if (sg == &qc->pad_sgent)
612 return 1;
613 if (qc->pad_len)
614 return 0;
615 if (((sg - qc->__sg) + 1) == qc->n_elem)
616 return 1;
617 return 0;
618}
619
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400620static inline struct scatterlist *
Tejun Heocc1887f32006-02-20 23:48:38 +0900621ata_qc_first_sg(struct ata_queued_cmd *qc)
622{
623 if (qc->n_elem)
624 return qc->__sg;
625 if (qc->pad_len)
626 return &qc->pad_sgent;
627 return NULL;
628}
629
630static inline struct scatterlist *
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400631ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
632{
633 if (sg == &qc->pad_sgent)
634 return NULL;
635 if (++sg - qc->__sg < qc->n_elem)
636 return sg;
Tejun Heocc1887f32006-02-20 23:48:38 +0900637 if (qc->pad_len)
638 return &qc->pad_sgent;
639 return NULL;
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400640}
641
642#define ata_for_each_sg(sg, qc) \
Tejun Heocc1887f32006-02-20 23:48:38 +0900643 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400644
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645static inline unsigned int ata_tag_valid(unsigned int tag)
646{
647 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
648}
649
Tejun Heo597afd22006-03-01 01:25:38 +0900650static inline unsigned int ata_class_present(unsigned int class)
651{
652 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
653}
654
Jeff Garzik057ace52005-10-22 14:27:05 -0400655static inline unsigned int ata_dev_present(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656{
Tejun Heo597afd22006-03-01 01:25:38 +0900657 return ata_class_present(dev->class);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658}
659
660static inline u8 ata_chk_status(struct ata_port *ap)
661{
662 return ap->ops->check_status(ap);
663}
664
Edward Falk0baab862005-06-02 18:17:13 -0400665
666/**
667 * ata_pause - Flush writes and pause 400 nanoseconds.
668 * @ap: Port to wait for.
669 *
670 * LOCKING:
671 * Inherited from caller.
672 */
673
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674static inline void ata_pause(struct ata_port *ap)
675{
676 ata_altstatus(ap);
677 ndelay(400);
678}
679
Edward Falk0baab862005-06-02 18:17:13 -0400680
681/**
682 * ata_busy_wait - Wait for a port status register
683 * @ap: Port to wait for.
684 *
685 * Waits up to max*10 microseconds for the selected bits in the port's
686 * status register to be cleared.
687 * Returns final value of status register.
688 *
689 * LOCKING:
690 * Inherited from caller.
691 */
692
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
694 unsigned int max)
695{
696 u8 status;
697
698 do {
699 udelay(10);
700 status = ata_chk_status(ap);
701 max--;
702 } while ((status & bits) && (max > 0));
703
704 return status;
705}
706
Edward Falk0baab862005-06-02 18:17:13 -0400707
708/**
709 * ata_wait_idle - Wait for a port to be idle.
710 * @ap: Port to wait for.
711 *
712 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
713 * Returns final value of status register.
714 *
715 * LOCKING:
716 * Inherited from caller.
717 */
718
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719static inline u8 ata_wait_idle(struct ata_port *ap)
720{
721 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
722
723 if (status & (ATA_BUSY | ATA_DRQ)) {
724 unsigned long l = ap->ioaddr.status_addr;
Randy Dunlapbfd60572006-01-17 19:34:42 -0500725 if (ata_msg_warn(ap))
726 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
727 status, l);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 }
729
730 return status;
731}
732
733static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
734{
735 qc->tf.ctl |= ATA_NIEN;
736}
737
738static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
739 unsigned int tag)
740{
741 if (likely(ata_tag_valid(tag)))
742 return &ap->qcmd[tag];
743 return NULL;
744}
745
746static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
747{
748 memset(tf, 0, sizeof(*tf));
749
750 tf->ctl = ap->ctl;
751 if (device == 0)
752 tf->device = ATA_DEVICE_OBS;
753 else
754 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
755}
756
Jeff Garzik2c13b7c2005-11-14 14:14:16 -0500757static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
758{
759 qc->__sg = NULL;
760 qc->flags = 0;
761 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
762 qc->nsect = 0;
763 qc->nbytes = qc->curbytes = 0;
Albert Leea22e2eb2005-12-05 15:38:02 +0800764 qc->err_mask = 0;
Jeff Garzik2c13b7c2005-11-14 14:14:16 -0500765
766 ata_tf_init(qc->ap, &qc->tf, qc->dev->devno);
767}
768
Tejun Heo76014422006-02-11 15:13:49 +0900769/**
770 * ata_qc_complete - Complete an active ATA command
771 * @qc: Command to complete
772 * @err_mask: ATA Status register contents
773 *
774 * Indicate to the mid and upper layers that an ATA
775 * command has completed, with either an ok or not-ok status.
776 *
777 * LOCKING:
778 * spin_lock_irqsave(host_set lock)
779 */
780static inline void ata_qc_complete(struct ata_queued_cmd *qc)
781{
782 if (unlikely(qc->flags & ATA_QCFLAG_EH_SCHEDULED))
783 return;
784
785 __ata_qc_complete(qc);
786}
Edward Falk0baab862005-06-02 18:17:13 -0400787
788/**
789 * ata_irq_on - Enable interrupts on a port.
790 * @ap: Port on which interrupts are enabled.
791 *
792 * Enable interrupts on a legacy IDE device using MMIO or PIO,
793 * wait for idle, clear any pending interrupts.
794 *
795 * LOCKING:
796 * Inherited from caller.
797 */
798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799static inline u8 ata_irq_on(struct ata_port *ap)
800{
801 struct ata_ioports *ioaddr = &ap->ioaddr;
802 u8 tmp;
803
804 ap->ctl &= ~ATA_NIEN;
805 ap->last_ctl = ap->ctl;
806
807 if (ap->flags & ATA_FLAG_MMIO)
808 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
809 else
810 outb(ap->ctl, ioaddr->ctl_addr);
811 tmp = ata_wait_idle(ap);
812
813 ap->ops->irq_clear(ap);
814
815 return tmp;
816}
817
Edward Falk0baab862005-06-02 18:17:13 -0400818
819/**
820 * ata_irq_ack - Acknowledge a device interrupt.
821 * @ap: Port on which interrupts are enabled.
822 *
823 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
824 * or BUSY+DRQ clear). Obtain dma status and port status from
825 * device. Clear the interrupt. Return port status.
826 *
827 * LOCKING:
828 */
829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
831{
832 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
833 u8 host_stat, post_stat, status;
834
835 status = ata_busy_wait(ap, bits, 1000);
836 if (status & bits)
Randy Dunlapbfd60572006-01-17 19:34:42 -0500837 if (ata_msg_err(ap))
838 printk(KERN_ERR "abnormal status 0x%X\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
840 /* get controller status; clear intr, err bits */
841 if (ap->flags & ATA_FLAG_MMIO) {
842 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
843 host_stat = readb(mmio + ATA_DMA_STATUS);
844 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
845 mmio + ATA_DMA_STATUS);
846
847 post_stat = readb(mmio + ATA_DMA_STATUS);
848 } else {
849 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
850 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
851 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
852
853 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
854 }
855
Randy Dunlapbfd60572006-01-17 19:34:42 -0500856 if (ata_msg_intr(ap))
857 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
858 __FUNCTION__,
859 host_stat, post_stat, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
861 return status;
862}
863
864static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
865{
866 return ap->ops->scr_read(ap, reg);
867}
868
869static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
870{
871 ap->ops->scr_write(ap, reg, val);
872}
873
Jeff Garzik8a60a072005-07-31 13:13:24 -0400874static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
Brett Russcdcca89e2005-03-28 15:10:27 -0500875 u32 val)
876{
877 ap->ops->scr_write(ap, reg, val);
878 (void) ap->ops->scr_read(ap, reg);
879}
880
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881static inline unsigned int sata_dev_present(struct ata_port *ap)
882{
883 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
884}
885
Jeff Garzik057ace52005-10-22 14:27:05 -0400886static inline int ata_try_flush_cache(const struct ata_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887{
888 return ata_id_wcache_enabled(dev->id) ||
889 ata_id_has_flush(dev->id) ||
890 ata_id_has_flush_ext(dev->id);
891}
892
Jeff Garzika7dac442005-10-30 04:44:42 -0500893static inline unsigned int ac_err_mask(u8 status)
894{
895 if (status & ATA_BUSY)
Tejun Heo11a56d22006-01-23 13:09:36 +0900896 return AC_ERR_HSM;
Jeff Garzika7dac442005-10-30 04:44:42 -0500897 if (status & (ATA_ERR | ATA_DF))
898 return AC_ERR_DEV;
899 return 0;
900}
901
902static inline unsigned int __ac_err_mask(u8 status)
903{
904 unsigned int mask = ac_err_mask(status);
905 if (mask == 0)
906 return AC_ERR_OTHER;
907 return mask;
908}
909
Jeff Garzik6037d6b2005-11-04 22:08:00 -0500910static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
911{
912 ap->pad_dma = 0;
913 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
914 &ap->pad_dma, GFP_KERNEL);
915 return (ap->pad == NULL) ? -ENOMEM : 0;
916}
917
918static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
919{
920 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
921}
922
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923#endif /* __LINUX_LIBATA_H__ */