Commit | Line | Data |
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1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * Copyright 2003-2005 Red Hat, Inc. All rights reserved. |
3 | * Copyright 2003-2005 Jeff Garzik | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; see the file COPYING. If not, write to | |
18 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | * | |
20 | * | |
21 | * libata documentation is available via 'make {ps|pdf}docs', | |
22 | * as Documentation/DocBook/libata.* | |
23 | * | |
1da177e4 LT |
24 | */ |
25 | ||
26 | #ifndef __LINUX_LIBATA_H__ | |
27 | #define __LINUX_LIBATA_H__ | |
28 | ||
29 | #include <linux/delay.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/pci.h> | |
1c72d8d9 | 32 | #include <linux/dma-mapping.h> |
1da177e4 LT |
33 | #include <asm/io.h> |
34 | #include <linux/ata.h> | |
35 | #include <linux/workqueue.h> | |
36 | ||
37 | /* | |
bfd60579 RD |
38 | * compile-time options: to be removed as soon as all the drivers are |
39 | * converted to the new debugging mechanism | |
1da177e4 LT |
40 | */ |
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 */ | |
1da177e4 LT |
45 | #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 | ||
2c13b7ce JG |
63 | #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) |
64 | ||
bfd60579 RD |
65 | /* NEW: debug levels */ |
66 | #define HAVE_LIBATA_MSG 1 | |
67 | ||
68 | enum { | |
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 | ||
88 | static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) | |
89 | { | |
90 | if (dval < 0 || dval >= (sizeof(u32) * 8)) | |
91 | return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ | |
92 | if (!dval) | |
93 | return 0; | |
94 | return (1 << dval) - 1; | |
95 | } | |
96 | ||
1da177e4 LT |
97 | /* defines only for the constants which don't work well as enums */ |
98 | #define ATA_TAG_POISON 0xfafbfcfdU | |
99 | ||
100 | /* move to PCI layer? */ | |
101 | static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) | |
102 | { | |
103 | return &pdev->dev; | |
104 | } | |
105 | ||
106 | enum { | |
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, | |
cf482935 | 120 | ATA_SHT_USE_CLUSTERING = 1, |
1da177e4 LT |
121 | |
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 */ | |
b00eec1d | 125 | ATA_DFLAG_LBA = (1 << 2), /* device supports LBA */ |
1da177e4 LT |
126 | |
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 */ | |
c19ba8af | 140 | ATA_FLAG_SRST = (1 << 5), /* (obsolete) use ATA SRST, not E.D.D. */ |
1da177e4 | 141 | ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */ |
c19ba8af | 142 | ATA_FLAG_SATA_RESET = (1 << 7), /* (obsolete) use COMRESET */ |
1da177e4 | 143 | ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */ |
c1389503 TH |
144 | ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once |
145 | * proper HSM is in place. */ | |
2c13b7ce | 146 | ATA_FLAG_DEBUGMSG = (1 << 10), |
50630195 | 147 | ATA_FLAG_NO_ATAPI = (1 << 11), /* No ATAPI support */ |
1da177e4 | 148 | |
9b847548 JA |
149 | ATA_FLAG_SUSPENDED = (1 << 12), /* port is suspended */ |
150 | ||
8d238e01 AC |
151 | 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 | ||
2e755f68 | 154 | ATA_FLAG_FLUSH_PORT_TASK = (1 << 15), /* Flush port task */ |
c18d06f8 | 155 | ATA_FLAG_IN_EH = (1 << 16), /* EH in progress */ |
dde44589 | 156 | |
1da177e4 LT |
157 | 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, | |
341963b9 | 161 | ATA_QCFLAG_EH_SCHEDULED = (1 << 5), /* EH scheduled */ |
1da177e4 LT |
162 | |
163 | /* various lengths of time */ | |
8d238e01 | 164 | ATA_TMOUT_EDD = 5 * HZ, /* heuristic */ |
1da177e4 | 165 | ATA_TMOUT_PIO = 30 * HZ, |
8d238e01 AC |
166 | ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ |
167 | ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ | |
1da177e4 LT |
168 | ATA_TMOUT_CDB = 30 * HZ, |
169 | ATA_TMOUT_CDB_QUICK = 5 * HZ, | |
a2a7a662 TH |
170 | ATA_TMOUT_INTERNAL = 30 * HZ, |
171 | ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, | |
1da177e4 LT |
172 | |
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 | |
1da7b0d0 | 191 | * unsigned int bitmap |
1da177e4 | 192 | */ |
1da7b0d0 TH |
193 | ATA_BITS_PIO = 5, |
194 | ATA_BITS_MWDMA = 3, | |
195 | ATA_BITS_UDMA = 8, | |
196 | ||
197 | ATA_SHIFT_PIO = 0, | |
198 | ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, | |
199 | ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, | |
200 | ||
201 | ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, | |
202 | ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, | |
203 | ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, | |
cedc9a47 JG |
204 | |
205 | /* size of buffer to pad xfers ending on unaligned boundaries */ | |
206 | ATA_DMA_PAD_SZ = 4, | |
207 | ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, | |
47a86593 AC |
208 | |
209 | /* Masks for port functions */ | |
210 | ATA_PORT_PRIMARY = (1 << 0), | |
211 | ATA_PORT_SECONDARY = (1 << 1), | |
1da177e4 LT |
212 | }; |
213 | ||
14be71f4 AL |
214 | enum hsm_task_states { |
215 | HSM_ST_UNKNOWN, | |
216 | HSM_ST_IDLE, | |
217 | HSM_ST_POLL, | |
218 | HSM_ST_TMOUT, | |
219 | HSM_ST, | |
220 | HSM_ST_LAST, | |
221 | HSM_ST_LAST_POLL, | |
222 | HSM_ST_ERR, | |
1da177e4 LT |
223 | }; |
224 | ||
a7dac447 | 225 | enum ata_completion_errors { |
11a56d24 TH |
226 | AC_ERR_DEV = (1 << 0), /* device reported error */ |
227 | AC_ERR_HSM = (1 << 1), /* host state machine violation */ | |
228 | AC_ERR_TIMEOUT = (1 << 2), /* timeout */ | |
229 | AC_ERR_MEDIA = (1 << 3), /* media error */ | |
230 | AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ | |
231 | AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ | |
232 | AC_ERR_SYSTEM = (1 << 6), /* system error */ | |
233 | AC_ERR_INVALID = (1 << 7), /* invalid argument */ | |
234 | AC_ERR_OTHER = (1 << 8), /* unknown */ | |
a7dac447 JG |
235 | }; |
236 | ||
1da177e4 LT |
237 | /* forward declarations */ |
238 | struct scsi_device; | |
239 | struct ata_port_operations; | |
240 | struct ata_port; | |
241 | struct ata_queued_cmd; | |
242 | ||
243 | /* typedefs */ | |
77853bf2 | 244 | typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); |
7944ea95 | 245 | typedef void (*ata_probeinit_fn_t)(struct ata_port *); |
a62c0fc5 TH |
246 | typedef int (*ata_reset_fn_t)(struct ata_port *, int, unsigned int *); |
247 | typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *); | |
1da177e4 LT |
248 | |
249 | struct ata_ioports { | |
250 | unsigned long cmd_addr; | |
251 | unsigned long data_addr; | |
252 | unsigned long error_addr; | |
253 | unsigned long feature_addr; | |
254 | unsigned long nsect_addr; | |
255 | unsigned long lbal_addr; | |
256 | unsigned long lbam_addr; | |
257 | unsigned long lbah_addr; | |
258 | unsigned long device_addr; | |
259 | unsigned long status_addr; | |
260 | unsigned long command_addr; | |
261 | unsigned long altstatus_addr; | |
262 | unsigned long ctl_addr; | |
263 | unsigned long bmdma_addr; | |
264 | unsigned long scr_addr; | |
265 | }; | |
266 | ||
267 | struct ata_probe_ent { | |
268 | struct list_head node; | |
269 | struct device *dev; | |
057ace5e | 270 | const struct ata_port_operations *port_ops; |
193515d5 | 271 | struct scsi_host_template *sht; |
1da177e4 LT |
272 | struct ata_ioports port[ATA_MAX_PORTS]; |
273 | unsigned int n_ports; | |
274 | unsigned int hard_port_no; | |
275 | unsigned int pio_mask; | |
276 | unsigned int mwdma_mask; | |
277 | unsigned int udma_mask; | |
278 | unsigned int legacy_mode; | |
279 | unsigned long irq; | |
280 | unsigned int irq_flags; | |
281 | unsigned long host_flags; | |
282 | void __iomem *mmio_base; | |
283 | void *private_data; | |
284 | }; | |
285 | ||
286 | struct ata_host_set { | |
287 | spinlock_t lock; | |
288 | struct device *dev; | |
289 | unsigned long irq; | |
290 | void __iomem *mmio_base; | |
291 | unsigned int n_ports; | |
292 | void *private_data; | |
057ace5e | 293 | const struct ata_port_operations *ops; |
1da177e4 LT |
294 | struct ata_port * ports[0]; |
295 | }; | |
296 | ||
297 | struct ata_queued_cmd { | |
298 | struct ata_port *ap; | |
299 | struct ata_device *dev; | |
300 | ||
301 | struct scsi_cmnd *scsicmd; | |
302 | void (*scsidone)(struct scsi_cmnd *); | |
303 | ||
304 | struct ata_taskfile tf; | |
305 | u8 cdb[ATAPI_CDB_LEN]; | |
306 | ||
307 | unsigned long flags; /* ATA_QCFLAG_xxx */ | |
308 | unsigned int tag; | |
309 | unsigned int n_elem; | |
cedc9a47 | 310 | unsigned int orig_n_elem; |
1da177e4 LT |
311 | |
312 | int dma_dir; | |
313 | ||
cedc9a47 JG |
314 | unsigned int pad_len; |
315 | ||
1da177e4 LT |
316 | unsigned int nsect; |
317 | unsigned int cursect; | |
318 | ||
319 | unsigned int nbytes; | |
320 | unsigned int curbytes; | |
321 | ||
322 | unsigned int cursg; | |
323 | unsigned int cursg_ofs; | |
324 | ||
325 | struct scatterlist sgent; | |
cedc9a47 | 326 | struct scatterlist pad_sgent; |
1da177e4 LT |
327 | void *buf_virt; |
328 | ||
cedc9a47 JG |
329 | /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ |
330 | struct scatterlist *__sg; | |
1da177e4 | 331 | |
a22e2eb0 AL |
332 | unsigned int err_mask; |
333 | ||
1da177e4 LT |
334 | ata_qc_cb_t complete_fn; |
335 | ||
1da177e4 LT |
336 | void *private_data; |
337 | }; | |
338 | ||
339 | struct ata_host_stats { | |
340 | unsigned long unhandled_irq; | |
341 | unsigned long idle_irq; | |
342 | unsigned long rw_reqbuf; | |
343 | }; | |
344 | ||
345 | struct ata_device { | |
346 | u64 n_sectors; /* size of device, if ATA */ | |
347 | unsigned long flags; /* ATA_DFLAG_xxx */ | |
348 | unsigned int class; /* ATA_DEV_xxx */ | |
349 | unsigned int devno; /* 0 or 1 */ | |
d9572b1d | 350 | u16 *id; /* IDENTIFY xxx DEVICE data */ |
1da177e4 LT |
351 | u8 pio_mode; |
352 | u8 dma_mode; | |
353 | u8 xfer_mode; | |
354 | unsigned int xfer_shift; /* ATA_SHIFT_xxx */ | |
355 | ||
8cbd6df1 AL |
356 | unsigned int multi_count; /* sectors count for |
357 | READ/WRITE MULTIPLE */ | |
b00eec1d | 358 | unsigned int max_sectors; /* per-device max sectors */ |
6e7846e9 | 359 | unsigned int cdb_len; |
8bf62ece | 360 | |
acf356b1 TH |
361 | /* per-dev xfer mask */ |
362 | unsigned int pio_mask; | |
363 | unsigned int mwdma_mask; | |
364 | unsigned int udma_mask; | |
365 | ||
8bf62ece AL |
366 | /* for CHS addressing */ |
367 | u16 cylinders; /* Number of cylinders */ | |
368 | u16 heads; /* Number of heads */ | |
369 | u16 sectors; /* Number of sectors per track */ | |
1da177e4 LT |
370 | }; |
371 | ||
372 | struct ata_port { | |
373 | struct Scsi_Host *host; /* our co-allocated scsi host */ | |
057ace5e | 374 | const struct ata_port_operations *ops; |
1da177e4 LT |
375 | unsigned long flags; /* ATA_FLAG_xxx */ |
376 | unsigned int id; /* unique id req'd by scsi midlyr */ | |
377 | unsigned int port_no; /* unique port #; from zero */ | |
378 | unsigned int hard_port_no; /* hardware port #; from zero */ | |
379 | ||
380 | struct ata_prd *prd; /* our SG list */ | |
381 | dma_addr_t prd_dma; /* and its DMA mapping */ | |
382 | ||
cedc9a47 JG |
383 | void *pad; /* array of DMA pad buffers */ |
384 | dma_addr_t pad_dma; | |
385 | ||
1da177e4 LT |
386 | struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ |
387 | ||
388 | u8 ctl; /* cache of ATA control register */ | |
389 | u8 last_ctl; /* Cache last written value */ | |
1da177e4 LT |
390 | unsigned int pio_mask; |
391 | unsigned int mwdma_mask; | |
392 | unsigned int udma_mask; | |
393 | unsigned int cbl; /* cable type; ATA_CBL_xxx */ | |
1da177e4 LT |
394 | |
395 | struct ata_device device[ATA_MAX_DEVICES]; | |
396 | ||
397 | struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; | |
398 | unsigned long qactive; | |
399 | unsigned int active_tag; | |
400 | ||
401 | struct ata_host_stats stats; | |
402 | struct ata_host_set *host_set; | |
403 | ||
86e45b6b TH |
404 | struct work_struct port_task; |
405 | ||
14be71f4 | 406 | unsigned int hsm_task_state; |
1da177e4 LT |
407 | unsigned long pio_task_timeout; |
408 | ||
bfd60579 | 409 | u32 msg_enable; |
a72ec4ce | 410 | struct list_head eh_done_q; |
bfd60579 | 411 | |
1da177e4 LT |
412 | void *private_data; |
413 | }; | |
414 | ||
415 | struct ata_port_operations { | |
416 | void (*port_disable) (struct ata_port *); | |
417 | ||
418 | void (*dev_config) (struct ata_port *, struct ata_device *); | |
419 | ||
420 | void (*set_piomode) (struct ata_port *, struct ata_device *); | |
421 | void (*set_dmamode) (struct ata_port *, struct ata_device *); | |
422 | ||
057ace5e | 423 | void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 LT |
424 | void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); |
425 | ||
057ace5e | 426 | void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 LT |
427 | u8 (*check_status)(struct ata_port *ap); |
428 | u8 (*check_altstatus)(struct ata_port *ap); | |
1da177e4 LT |
429 | void (*dev_select)(struct ata_port *ap, unsigned int device); |
430 | ||
c19ba8af TH |
431 | void (*phy_reset) (struct ata_port *ap); /* obsolete */ |
432 | int (*probe_reset) (struct ata_port *ap, unsigned int *classes); | |
433 | ||
1da177e4 LT |
434 | void (*post_set_mode) (struct ata_port *ap); |
435 | ||
436 | int (*check_atapi_dma) (struct ata_queued_cmd *qc); | |
437 | ||
438 | void (*bmdma_setup) (struct ata_queued_cmd *qc); | |
439 | void (*bmdma_start) (struct ata_queued_cmd *qc); | |
440 | ||
441 | void (*qc_prep) (struct ata_queued_cmd *qc); | |
9a3d9eb0 | 442 | unsigned int (*qc_issue) (struct ata_queued_cmd *qc); |
1da177e4 LT |
443 | |
444 | void (*eng_timeout) (struct ata_port *ap); | |
445 | ||
446 | irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); | |
447 | void (*irq_clear) (struct ata_port *); | |
448 | ||
449 | u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); | |
450 | void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, | |
451 | u32 val); | |
452 | ||
453 | int (*port_start) (struct ata_port *ap); | |
454 | void (*port_stop) (struct ata_port *ap); | |
455 | ||
456 | void (*host_stop) (struct ata_host_set *host_set); | |
457 | ||
b73fc89f | 458 | void (*bmdma_stop) (struct ata_queued_cmd *qc); |
1da177e4 LT |
459 | u8 (*bmdma_status) (struct ata_port *ap); |
460 | }; | |
461 | ||
462 | struct ata_port_info { | |
d0be4a7d | 463 | struct scsi_host_template *sht; |
1da177e4 LT |
464 | unsigned long host_flags; |
465 | unsigned long pio_mask; | |
466 | unsigned long mwdma_mask; | |
467 | unsigned long udma_mask; | |
057ace5e | 468 | const struct ata_port_operations *port_ops; |
e99f8b5e | 469 | void *private_data; |
1da177e4 LT |
470 | }; |
471 | ||
452503f9 AC |
472 | struct ata_timing { |
473 | unsigned short mode; /* ATA mode */ | |
474 | unsigned short setup; /* t1 */ | |
475 | unsigned short act8b; /* t2 for 8-bit I/O */ | |
476 | unsigned short rec8b; /* t2i for 8-bit I/O */ | |
477 | unsigned short cyc8b; /* t0 for 8-bit I/O */ | |
478 | unsigned short active; /* t2 or tD */ | |
479 | unsigned short recover; /* t2i or tK */ | |
480 | unsigned short cycle; /* t0 */ | |
481 | unsigned short udma; /* t2CYCTYP/2 */ | |
482 | }; | |
483 | ||
484 | #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) | |
1da177e4 LT |
485 | |
486 | extern void ata_port_probe(struct ata_port *); | |
487 | extern void __sata_phy_reset(struct ata_port *ap); | |
488 | extern void sata_phy_reset(struct ata_port *ap); | |
489 | extern void ata_bus_reset(struct ata_port *ap); | |
a62c0fc5 | 490 | extern int ata_drive_probe_reset(struct ata_port *ap, |
7944ea95 | 491 | ata_probeinit_fn_t probeinit, |
a62c0fc5 TH |
492 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
493 | ata_postreset_fn_t postreset, unsigned int *classes); | |
8a19ac89 | 494 | extern void ata_std_probeinit(struct ata_port *ap); |
c2bd5804 TH |
495 | extern int ata_std_softreset(struct ata_port *ap, int verbose, |
496 | unsigned int *classes); | |
497 | extern int sata_std_hardreset(struct ata_port *ap, int verbose, | |
498 | unsigned int *class); | |
499 | extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); | |
623a3128 TH |
500 | extern int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev, |
501 | int post_reset); | |
1da177e4 LT |
502 | extern void ata_port_disable(struct ata_port *); |
503 | extern void ata_std_ports(struct ata_ioports *ioaddr); | |
504 | #ifdef CONFIG_PCI | |
505 | extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, | |
506 | unsigned int n_ports); | |
507 | extern void ata_pci_remove_one (struct pci_dev *pdev); | |
9b847548 JA |
508 | extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state); |
509 | extern int ata_pci_device_resume(struct pci_dev *pdev); | |
17bb34a3 | 510 | extern int ata_pci_clear_simplex(struct pci_dev *pdev); |
1da177e4 | 511 | #endif /* CONFIG_PCI */ |
057ace5e | 512 | extern int ata_device_add(const struct ata_probe_ent *ent); |
17b14451 | 513 | extern void ata_host_set_remove(struct ata_host_set *host_set); |
193515d5 | 514 | extern int ata_scsi_detect(struct scsi_host_template *sht); |
1da177e4 LT |
515 | extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); |
516 | extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); | |
517 | extern int ata_scsi_error(struct Scsi_Host *host); | |
a72ec4ce TH |
518 | extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); |
519 | extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); | |
1da177e4 LT |
520 | extern int ata_scsi_release(struct Scsi_Host *host); |
521 | extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); | |
9b847548 | 522 | extern int ata_scsi_device_resume(struct scsi_device *); |
082776e4 | 523 | extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state); |
9b847548 | 524 | extern int ata_device_resume(struct ata_port *, struct ata_device *); |
082776e4 | 525 | extern int ata_device_suspend(struct ata_port *, struct ata_device *, pm_message_t state); |
67846b30 | 526 | extern int ata_ratelimit(void); |
6f8b9958 TH |
527 | extern unsigned int ata_busy_sleep(struct ata_port *ap, |
528 | unsigned long timeout_pat, | |
529 | unsigned long timeout); | |
86e45b6b TH |
530 | extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), |
531 | void *data, unsigned long delay); | |
67846b30 | 532 | |
1da177e4 LT |
533 | /* |
534 | * Default driver ops implementations | |
535 | */ | |
057ace5e | 536 | extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 | 537 | extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); |
057ace5e JG |
538 | extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); |
539 | extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); | |
1da177e4 LT |
540 | extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); |
541 | extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); | |
542 | extern u8 ata_check_status(struct ata_port *ap); | |
543 | extern u8 ata_altstatus(struct ata_port *ap); | |
057ace5e | 544 | extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); |
c2bd5804 | 545 | extern int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes); |
1da177e4 LT |
546 | extern int ata_port_start (struct ata_port *ap); |
547 | extern void ata_port_stop (struct ata_port *ap); | |
aa8f0dc6 | 548 | extern void ata_host_stop (struct ata_host_set *host_set); |
1da177e4 LT |
549 | extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); |
550 | extern void ata_qc_prep(struct ata_queued_cmd *qc); | |
e46834cd | 551 | extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); |
9a3d9eb0 | 552 | extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); |
1da177e4 LT |
553 | extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, |
554 | unsigned int buflen); | |
555 | extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
556 | unsigned int n_elem); | |
057ace5e | 557 | extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); |
6a62a04d TH |
558 | extern void ata_id_string(const u16 *id, unsigned char *s, |
559 | unsigned int ofs, unsigned int len); | |
560 | extern void ata_id_c_string(const u16 *id, unsigned char *s, | |
561 | unsigned int ofs, unsigned int len); | |
1da177e4 LT |
562 | extern void ata_bmdma_setup (struct ata_queued_cmd *qc); |
563 | extern void ata_bmdma_start (struct ata_queued_cmd *qc); | |
b73fc89f | 564 | extern void ata_bmdma_stop(struct ata_queued_cmd *qc); |
1da177e4 LT |
565 | extern u8 ata_bmdma_status(struct ata_port *ap); |
566 | extern void ata_bmdma_irq_clear(struct ata_port *ap); | |
76014427 | 567 | extern void __ata_qc_complete(struct ata_queued_cmd *qc); |
1da177e4 | 568 | extern void ata_eng_timeout(struct ata_port *ap); |
9a3dccc4 TH |
569 | extern void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev, |
570 | struct scsi_cmnd *cmd, | |
1da177e4 LT |
571 | void (*done)(struct scsi_cmnd *)); |
572 | extern int ata_std_bios_param(struct scsi_device *sdev, | |
573 | struct block_device *bdev, | |
574 | sector_t capacity, int geom[]); | |
575 | extern int ata_scsi_slave_config(struct scsi_device *sdev); | |
ebdfca6e AC |
576 | extern struct ata_device *ata_dev_pair(struct ata_port *ap, |
577 | struct ata_device *adev); | |
1da177e4 | 578 | |
452503f9 AC |
579 | /* |
580 | * Timing helpers | |
581 | */ | |
1bc4ccff AC |
582 | |
583 | extern unsigned int ata_pio_need_iordy(const struct ata_device *); | |
452503f9 AC |
584 | extern int ata_timing_compute(struct ata_device *, unsigned short, |
585 | struct ata_timing *, int, int); | |
586 | extern void ata_timing_merge(const struct ata_timing *, | |
587 | const struct ata_timing *, struct ata_timing *, | |
588 | unsigned int); | |
589 | ||
590 | enum { | |
591 | ATA_TIMING_SETUP = (1 << 0), | |
592 | ATA_TIMING_ACT8B = (1 << 1), | |
593 | ATA_TIMING_REC8B = (1 << 2), | |
594 | ATA_TIMING_CYC8B = (1 << 3), | |
595 | ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | | |
596 | ATA_TIMING_CYC8B, | |
597 | ATA_TIMING_ACTIVE = (1 << 4), | |
598 | ATA_TIMING_RECOVER = (1 << 5), | |
599 | ATA_TIMING_CYCLE = (1 << 6), | |
600 | ATA_TIMING_UDMA = (1 << 7), | |
601 | ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | | |
602 | ATA_TIMING_REC8B | ATA_TIMING_CYC8B | | |
603 | ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | | |
604 | ATA_TIMING_CYCLE | ATA_TIMING_UDMA, | |
605 | }; | |
606 | ||
1da177e4 LT |
607 | |
608 | #ifdef CONFIG_PCI | |
609 | struct pci_bits { | |
610 | unsigned int reg; /* PCI config register to read */ | |
611 | unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ | |
612 | unsigned long mask; | |
613 | unsigned long val; | |
614 | }; | |
615 | ||
374b1873 | 616 | extern void ata_pci_host_stop (struct ata_host_set *host_set); |
1da177e4 | 617 | extern struct ata_probe_ent * |
47a86593 | 618 | ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); |
057ace5e | 619 | extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); |
17bb34a3 | 620 | extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long); |
1da177e4 LT |
621 | #endif /* CONFIG_PCI */ |
622 | ||
623 | ||
972c26bd JG |
624 | static inline int |
625 | ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) | |
626 | { | |
627 | if (sg == &qc->pad_sgent) | |
628 | return 1; | |
629 | if (qc->pad_len) | |
630 | return 0; | |
631 | if (((sg - qc->__sg) + 1) == qc->n_elem) | |
632 | return 1; | |
633 | return 0; | |
634 | } | |
635 | ||
cc1887f3 TH |
636 | static inline struct scatterlist * |
637 | ata_qc_first_sg(struct ata_queued_cmd *qc) | |
638 | { | |
639 | if (qc->n_elem) | |
640 | return qc->__sg; | |
641 | if (qc->pad_len) | |
642 | return &qc->pad_sgent; | |
643 | return NULL; | |
644 | } | |
645 | ||
cedc9a47 JG |
646 | static inline struct scatterlist * |
647 | ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) | |
648 | { | |
649 | if (sg == &qc->pad_sgent) | |
650 | return NULL; | |
651 | if (++sg - qc->__sg < qc->n_elem) | |
652 | return sg; | |
cc1887f3 TH |
653 | if (qc->pad_len) |
654 | return &qc->pad_sgent; | |
655 | return NULL; | |
cedc9a47 JG |
656 | } |
657 | ||
658 | #define ata_for_each_sg(sg, qc) \ | |
cc1887f3 | 659 | for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) |
cedc9a47 | 660 | |
1da177e4 LT |
661 | static inline unsigned int ata_tag_valid(unsigned int tag) |
662 | { | |
663 | return (tag < ATA_MAX_QUEUE) ? 1 : 0; | |
664 | } | |
665 | ||
597afd21 TH |
666 | static inline unsigned int ata_class_present(unsigned int class) |
667 | { | |
668 | return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; | |
669 | } | |
670 | ||
057ace5e | 671 | static inline unsigned int ata_dev_present(const struct ata_device *dev) |
1da177e4 | 672 | { |
597afd21 | 673 | return ata_class_present(dev->class); |
1da177e4 LT |
674 | } |
675 | ||
676 | static inline u8 ata_chk_status(struct ata_port *ap) | |
677 | { | |
678 | return ap->ops->check_status(ap); | |
679 | } | |
680 | ||
0baab86b EF |
681 | |
682 | /** | |
683 | * ata_pause - Flush writes and pause 400 nanoseconds. | |
684 | * @ap: Port to wait for. | |
685 | * | |
686 | * LOCKING: | |
687 | * Inherited from caller. | |
688 | */ | |
689 | ||
1da177e4 LT |
690 | static inline void ata_pause(struct ata_port *ap) |
691 | { | |
692 | ata_altstatus(ap); | |
693 | ndelay(400); | |
694 | } | |
695 | ||
0baab86b EF |
696 | |
697 | /** | |
698 | * ata_busy_wait - Wait for a port status register | |
699 | * @ap: Port to wait for. | |
700 | * | |
701 | * Waits up to max*10 microseconds for the selected bits in the port's | |
702 | * status register to be cleared. | |
703 | * Returns final value of status register. | |
704 | * | |
705 | * LOCKING: | |
706 | * Inherited from caller. | |
707 | */ | |
708 | ||
1da177e4 LT |
709 | static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, |
710 | unsigned int max) | |
711 | { | |
712 | u8 status; | |
713 | ||
714 | do { | |
715 | udelay(10); | |
716 | status = ata_chk_status(ap); | |
717 | max--; | |
718 | } while ((status & bits) && (max > 0)); | |
719 | ||
720 | return status; | |
721 | } | |
722 | ||
0baab86b EF |
723 | |
724 | /** | |
725 | * ata_wait_idle - Wait for a port to be idle. | |
726 | * @ap: Port to wait for. | |
727 | * | |
728 | * Waits up to 10ms for port's BUSY and DRQ signals to clear. | |
729 | * Returns final value of status register. | |
730 | * | |
731 | * LOCKING: | |
732 | * Inherited from caller. | |
733 | */ | |
734 | ||
1da177e4 LT |
735 | static inline u8 ata_wait_idle(struct ata_port *ap) |
736 | { | |
737 | u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); | |
738 | ||
739 | if (status & (ATA_BUSY | ATA_DRQ)) { | |
740 | unsigned long l = ap->ioaddr.status_addr; | |
bfd60579 RD |
741 | if (ata_msg_warn(ap)) |
742 | printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n", | |
743 | status, l); | |
1da177e4 LT |
744 | } |
745 | ||
746 | return status; | |
747 | } | |
748 | ||
749 | static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) | |
750 | { | |
751 | qc->tf.ctl |= ATA_NIEN; | |
752 | } | |
753 | ||
754 | static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap, | |
755 | unsigned int tag) | |
756 | { | |
757 | if (likely(ata_tag_valid(tag))) | |
758 | return &ap->qcmd[tag]; | |
759 | return NULL; | |
760 | } | |
761 | ||
762 | static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device) | |
763 | { | |
764 | memset(tf, 0, sizeof(*tf)); | |
765 | ||
766 | tf->ctl = ap->ctl; | |
767 | if (device == 0) | |
768 | tf->device = ATA_DEVICE_OBS; | |
769 | else | |
770 | tf->device = ATA_DEVICE_OBS | ATA_DEV1; | |
771 | } | |
772 | ||
2c13b7ce JG |
773 | static inline void ata_qc_reinit(struct ata_queued_cmd *qc) |
774 | { | |
775 | qc->__sg = NULL; | |
776 | qc->flags = 0; | |
777 | qc->cursect = qc->cursg = qc->cursg_ofs = 0; | |
778 | qc->nsect = 0; | |
779 | qc->nbytes = qc->curbytes = 0; | |
a22e2eb0 | 780 | qc->err_mask = 0; |
2c13b7ce JG |
781 | |
782 | ata_tf_init(qc->ap, &qc->tf, qc->dev->devno); | |
783 | } | |
784 | ||
76014427 TH |
785 | /** |
786 | * ata_qc_complete - Complete an active ATA command | |
787 | * @qc: Command to complete | |
788 | * @err_mask: ATA Status register contents | |
789 | * | |
790 | * Indicate to the mid and upper layers that an ATA | |
791 | * command has completed, with either an ok or not-ok status. | |
792 | * | |
793 | * LOCKING: | |
794 | * spin_lock_irqsave(host_set lock) | |
795 | */ | |
796 | static inline void ata_qc_complete(struct ata_queued_cmd *qc) | |
797 | { | |
798 | if (unlikely(qc->flags & ATA_QCFLAG_EH_SCHEDULED)) | |
799 | return; | |
800 | ||
801 | __ata_qc_complete(qc); | |
802 | } | |
0baab86b EF |
803 | |
804 | /** | |
805 | * ata_irq_on - Enable interrupts on a port. | |
806 | * @ap: Port on which interrupts are enabled. | |
807 | * | |
808 | * Enable interrupts on a legacy IDE device using MMIO or PIO, | |
809 | * wait for idle, clear any pending interrupts. | |
810 | * | |
811 | * LOCKING: | |
812 | * Inherited from caller. | |
813 | */ | |
814 | ||
1da177e4 LT |
815 | static inline u8 ata_irq_on(struct ata_port *ap) |
816 | { | |
817 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
818 | u8 tmp; | |
819 | ||
820 | ap->ctl &= ~ATA_NIEN; | |
821 | ap->last_ctl = ap->ctl; | |
822 | ||
823 | if (ap->flags & ATA_FLAG_MMIO) | |
824 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
825 | else | |
826 | outb(ap->ctl, ioaddr->ctl_addr); | |
827 | tmp = ata_wait_idle(ap); | |
828 | ||
829 | ap->ops->irq_clear(ap); | |
830 | ||
831 | return tmp; | |
832 | } | |
833 | ||
0baab86b EF |
834 | |
835 | /** | |
836 | * ata_irq_ack - Acknowledge a device interrupt. | |
837 | * @ap: Port on which interrupts are enabled. | |
838 | * | |
839 | * Wait up to 10 ms for legacy IDE device to become idle (BUSY | |
840 | * or BUSY+DRQ clear). Obtain dma status and port status from | |
841 | * device. Clear the interrupt. Return port status. | |
842 | * | |
843 | * LOCKING: | |
844 | */ | |
845 | ||
1da177e4 LT |
846 | static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) |
847 | { | |
848 | unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; | |
849 | u8 host_stat, post_stat, status; | |
850 | ||
851 | status = ata_busy_wait(ap, bits, 1000); | |
852 | if (status & bits) | |
bfd60579 RD |
853 | if (ata_msg_err(ap)) |
854 | printk(KERN_ERR "abnormal status 0x%X\n", status); | |
1da177e4 LT |
855 | |
856 | /* get controller status; clear intr, err bits */ | |
857 | if (ap->flags & ATA_FLAG_MMIO) { | |
858 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; | |
859 | host_stat = readb(mmio + ATA_DMA_STATUS); | |
860 | writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, | |
861 | mmio + ATA_DMA_STATUS); | |
862 | ||
863 | post_stat = readb(mmio + ATA_DMA_STATUS); | |
864 | } else { | |
865 | host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
866 | outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, | |
867 | ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
868 | ||
869 | post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
870 | } | |
871 | ||
bfd60579 RD |
872 | if (ata_msg_intr(ap)) |
873 | printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", | |
874 | __FUNCTION__, | |
875 | host_stat, post_stat, status); | |
1da177e4 LT |
876 | |
877 | return status; | |
878 | } | |
879 | ||
880 | static inline u32 scr_read(struct ata_port *ap, unsigned int reg) | |
881 | { | |
882 | return ap->ops->scr_read(ap, reg); | |
883 | } | |
884 | ||
885 | static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val) | |
886 | { | |
887 | ap->ops->scr_write(ap, reg, val); | |
888 | } | |
889 | ||
8a60a071 | 890 | static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, |
cdcca89e BR |
891 | u32 val) |
892 | { | |
893 | ap->ops->scr_write(ap, reg, val); | |
894 | (void) ap->ops->scr_read(ap, reg); | |
895 | } | |
896 | ||
1da177e4 LT |
897 | static inline unsigned int sata_dev_present(struct ata_port *ap) |
898 | { | |
899 | return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; | |
900 | } | |
901 | ||
057ace5e | 902 | static inline int ata_try_flush_cache(const struct ata_device *dev) |
1da177e4 LT |
903 | { |
904 | return ata_id_wcache_enabled(dev->id) || | |
905 | ata_id_has_flush(dev->id) || | |
906 | ata_id_has_flush_ext(dev->id); | |
907 | } | |
908 | ||
a7dac447 JG |
909 | static inline unsigned int ac_err_mask(u8 status) |
910 | { | |
911 | if (status & ATA_BUSY) | |
11a56d24 | 912 | return AC_ERR_HSM; |
a7dac447 JG |
913 | if (status & (ATA_ERR | ATA_DF)) |
914 | return AC_ERR_DEV; | |
915 | return 0; | |
916 | } | |
917 | ||
918 | static inline unsigned int __ac_err_mask(u8 status) | |
919 | { | |
920 | unsigned int mask = ac_err_mask(status); | |
921 | if (mask == 0) | |
922 | return AC_ERR_OTHER; | |
923 | return mask; | |
924 | } | |
925 | ||
6037d6bb JG |
926 | static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) |
927 | { | |
928 | ap->pad_dma = 0; | |
929 | ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, | |
930 | &ap->pad_dma, GFP_KERNEL); | |
931 | return (ap->pad == NULL) ? -ENOMEM : 0; | |
932 | } | |
933 | ||
934 | static inline void ata_pad_free(struct ata_port *ap, struct device *dev) | |
935 | { | |
936 | dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); | |
937 | } | |
938 | ||
1da177e4 | 939 | #endif /* __LINUX_LIBATA_H__ */ |