Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
af36d7f0 JG |
2 | * Copyright 2003-2005 Red Hat, Inc. All rights reserved. |
3 | * Copyright 2003-2005 Jeff Garzik | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; see the file COPYING. If not, write to | |
18 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | * | |
20 | * | |
21 | * libata documentation is available via 'make {ps|pdf}docs', | |
22 | * as Documentation/DocBook/libata.* | |
23 | * | |
1da177e4 LT |
24 | */ |
25 | ||
26 | #ifndef __LINUX_LIBATA_H__ | |
27 | #define __LINUX_LIBATA_H__ | |
28 | ||
29 | #include <linux/delay.h> | |
30 | #include <linux/interrupt.h> | |
31 | #include <linux/pci.h> | |
1c72d8d9 | 32 | #include <linux/dma-mapping.h> |
1da177e4 LT |
33 | #include <asm/io.h> |
34 | #include <linux/ata.h> | |
35 | #include <linux/workqueue.h> | |
35bb94b1 | 36 | #include <scsi/scsi_host.h> |
1da177e4 LT |
37 | |
38 | /* | |
bfd60579 RD |
39 | * compile-time options: to be removed as soon as all the drivers are |
40 | * converted to the new debugging mechanism | |
1da177e4 LT |
41 | */ |
42 | #undef ATA_DEBUG /* debugging output */ | |
43 | #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ | |
44 | #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ | |
45 | #undef ATA_NDEBUG /* define to disable quick runtime checks */ | |
1da177e4 LT |
46 | #undef ATA_ENABLE_PATA /* define to enable PATA support in some |
47 | * low-level drivers */ | |
1da177e4 LT |
48 | |
49 | ||
50 | /* note: prints function name for you */ | |
51 | #ifdef ATA_DEBUG | |
52 | #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) | |
53 | #ifdef ATA_VERBOSE_DEBUG | |
54 | #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) | |
55 | #else | |
56 | #define VPRINTK(fmt, args...) | |
57 | #endif /* ATA_VERBOSE_DEBUG */ | |
58 | #else | |
59 | #define DPRINTK(fmt, args...) | |
60 | #define VPRINTK(fmt, args...) | |
61 | #endif /* ATA_DEBUG */ | |
62 | ||
2c13b7ce JG |
63 | #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) |
64 | ||
bfd60579 RD |
65 | /* NEW: debug levels */ |
66 | #define HAVE_LIBATA_MSG 1 | |
67 | ||
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, | |
2ab7db1f TH |
111 | /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ |
112 | ATA_MAX_QUEUE = 2, | |
113 | ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, | |
1da177e4 LT |
114 | ATA_MAX_SECTORS = 200, /* FIXME */ |
115 | ATA_MAX_BUS = 2, | |
116 | ATA_DEF_BUSY_WAIT = 10000, | |
117 | ATA_SHORT_PAUSE = (HZ >> 6) + 1, | |
118 | ||
119 | ATA_SHT_EMULATED = 1, | |
120 | ATA_SHT_CMD_PER_LUN = 1, | |
121 | ATA_SHT_THIS_ID = -1, | |
cf482935 | 122 | ATA_SHT_USE_CLUSTERING = 1, |
1da177e4 LT |
123 | |
124 | /* struct ata_device stuff */ | |
949b38af TH |
125 | ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ |
126 | ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ | |
ea1dd4e1 | 127 | ATA_DFLAG_CFG_MASK = (1 << 8) - 1, |
949b38af TH |
128 | |
129 | ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */ | |
1da177e4 LT |
130 | |
131 | ATA_DEV_UNKNOWN = 0, /* unknown device */ | |
132 | ATA_DEV_ATA = 1, /* ATA device */ | |
133 | ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ | |
134 | ATA_DEV_ATAPI = 3, /* ATAPI device */ | |
135 | ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ | |
136 | ATA_DEV_NONE = 5, /* no device */ | |
137 | ||
138 | /* struct ata_port flags */ | |
949b38af | 139 | ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ |
1da177e4 | 140 | /* (doesn't imply presence) */ |
949b38af TH |
141 | ATA_FLAG_SATA = (1 << 1), |
142 | ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ | |
143 | ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ | |
144 | ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ | |
145 | ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ | |
146 | ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ | |
147 | ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ | |
148 | ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ | |
149 | ATA_FLAG_IRQ_MASK = (1 << 9), /* Mask IRQ in PIO xfers */ | |
150 | ||
9ec957f2 | 151 | ATA_FLAG_NOINTR = (1 << 13), /* FIXME: Remove this once |
949b38af | 152 | * proper HSM is in place. */ |
9ec957f2 TH |
153 | ATA_FLAG_DEBUGMSG = (1 << 14), |
154 | ATA_FLAG_FLUSH_PORT_TASK = (1 << 15), /* flush port task */ | |
949b38af | 155 | |
9ec957f2 TH |
156 | ATA_FLAG_EH_PENDING = (1 << 16), /* EH pending */ |
157 | ATA_FLAG_FROZEN = (1 << 17), /* port is frozen */ | |
9be1e979 | 158 | ATA_FLAG_RECOVERED = (1 << 18), /* recovery action performed */ |
9ec957f2 TH |
159 | |
160 | ATA_FLAG_DISABLED = (1 << 22), /* port is disabled, ignore it */ | |
161 | ATA_FLAG_SUSPENDED = (1 << 23), /* port is suspended (power) */ | |
949b38af TH |
162 | |
163 | /* bits 24:31 of ap->flags are reserved for LLDD specific flags */ | |
164 | ||
165 | /* struct ata_queued_cmd flags */ | |
166 | ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ | |
167 | ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ | |
168 | ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ | |
1da177e4 | 169 | ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, |
27197367 | 170 | ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ |
e61e0672 TH |
171 | ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ |
172 | ||
9ec957f2 TH |
173 | ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ |
174 | ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ | |
175 | ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ | |
1da177e4 | 176 | |
4e5ec5db AC |
177 | /* host set flags */ |
178 | ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */ | |
179 | ||
1da177e4 | 180 | /* various lengths of time */ |
1da177e4 | 181 | ATA_TMOUT_PIO = 30 * HZ, |
8d238e01 AC |
182 | ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ |
183 | ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ | |
1da177e4 LT |
184 | ATA_TMOUT_CDB = 30 * HZ, |
185 | ATA_TMOUT_CDB_QUICK = 5 * HZ, | |
a2a7a662 TH |
186 | ATA_TMOUT_INTERNAL = 30 * HZ, |
187 | ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, | |
1da177e4 LT |
188 | |
189 | /* ATA bus states */ | |
190 | BUS_UNKNOWN = 0, | |
191 | BUS_DMA = 1, | |
192 | BUS_IDLE = 2, | |
193 | BUS_NOINTR = 3, | |
194 | BUS_NODATA = 4, | |
195 | BUS_TIMER = 5, | |
196 | BUS_PIO = 6, | |
197 | BUS_EDD = 7, | |
198 | BUS_IDENTIFY = 8, | |
199 | BUS_PACKET = 9, | |
200 | ||
201 | /* SATA port states */ | |
202 | PORT_UNKNOWN = 0, | |
203 | PORT_ENABLED = 1, | |
204 | PORT_DISABLED = 2, | |
205 | ||
206 | /* encoding various smaller bitmaps into a single | |
1da7b0d0 | 207 | * unsigned int bitmap |
1da177e4 | 208 | */ |
1da7b0d0 TH |
209 | ATA_BITS_PIO = 5, |
210 | ATA_BITS_MWDMA = 3, | |
211 | ATA_BITS_UDMA = 8, | |
212 | ||
213 | ATA_SHIFT_PIO = 0, | |
214 | ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, | |
215 | ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, | |
216 | ||
217 | ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, | |
218 | ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, | |
219 | ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, | |
cedc9a47 JG |
220 | |
221 | /* size of buffer to pad xfers ending on unaligned boundaries */ | |
222 | ATA_DMA_PAD_SZ = 4, | |
223 | ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, | |
949b38af TH |
224 | |
225 | /* masks for port functions */ | |
47a86593 AC |
226 | ATA_PORT_PRIMARY = (1 << 0), |
227 | ATA_PORT_SECONDARY = (1 << 1), | |
14d2bac1 | 228 | |
9be1e979 TH |
229 | /* reset / recovery action types */ |
230 | ATA_EH_REVALIDATE = (1 << 0), | |
231 | ATA_EH_SOFTRESET = (1 << 1), | |
232 | ATA_EH_HARDRESET = (1 << 2), | |
233 | ||
234 | ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, | |
235 | ||
ad9e2762 TH |
236 | /* max repeat if error condition is still set after ->error_handler */ |
237 | ATA_EH_MAX_REPEAT = 5, | |
238 | ||
14d2bac1 TH |
239 | /* how hard are we gonna try to probe/recover devices */ |
240 | ATA_PROBE_MAX_TRIES = 3, | |
1da177e4 LT |
241 | }; |
242 | ||
14be71f4 AL |
243 | enum hsm_task_states { |
244 | HSM_ST_UNKNOWN, | |
245 | HSM_ST_IDLE, | |
246 | HSM_ST_POLL, | |
247 | HSM_ST_TMOUT, | |
248 | HSM_ST, | |
249 | HSM_ST_LAST, | |
250 | HSM_ST_LAST_POLL, | |
251 | HSM_ST_ERR, | |
1da177e4 LT |
252 | }; |
253 | ||
a7dac447 | 254 | enum ata_completion_errors { |
11a56d24 TH |
255 | AC_ERR_DEV = (1 << 0), /* device reported error */ |
256 | AC_ERR_HSM = (1 << 1), /* host state machine violation */ | |
257 | AC_ERR_TIMEOUT = (1 << 2), /* timeout */ | |
258 | AC_ERR_MEDIA = (1 << 3), /* media error */ | |
259 | AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ | |
260 | AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ | |
261 | AC_ERR_SYSTEM = (1 << 6), /* system error */ | |
262 | AC_ERR_INVALID = (1 << 7), /* invalid argument */ | |
263 | AC_ERR_OTHER = (1 << 8), /* unknown */ | |
a7dac447 JG |
264 | }; |
265 | ||
1da177e4 LT |
266 | /* forward declarations */ |
267 | struct scsi_device; | |
268 | struct ata_port_operations; | |
269 | struct ata_port; | |
270 | struct ata_queued_cmd; | |
271 | ||
272 | /* typedefs */ | |
77853bf2 | 273 | typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); |
7944ea95 | 274 | typedef void (*ata_probeinit_fn_t)(struct ata_port *); |
2bf2cb26 | 275 | typedef int (*ata_reset_fn_t)(struct ata_port *, unsigned int *); |
a62c0fc5 | 276 | typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *); |
1da177e4 LT |
277 | |
278 | struct ata_ioports { | |
279 | unsigned long cmd_addr; | |
280 | unsigned long data_addr; | |
281 | unsigned long error_addr; | |
282 | unsigned long feature_addr; | |
283 | unsigned long nsect_addr; | |
284 | unsigned long lbal_addr; | |
285 | unsigned long lbam_addr; | |
286 | unsigned long lbah_addr; | |
287 | unsigned long device_addr; | |
288 | unsigned long status_addr; | |
289 | unsigned long command_addr; | |
290 | unsigned long altstatus_addr; | |
291 | unsigned long ctl_addr; | |
292 | unsigned long bmdma_addr; | |
293 | unsigned long scr_addr; | |
294 | }; | |
295 | ||
296 | struct ata_probe_ent { | |
297 | struct list_head node; | |
298 | struct device *dev; | |
057ace5e | 299 | const struct ata_port_operations *port_ops; |
193515d5 | 300 | struct scsi_host_template *sht; |
1da177e4 LT |
301 | struct ata_ioports port[ATA_MAX_PORTS]; |
302 | unsigned int n_ports; | |
303 | unsigned int hard_port_no; | |
304 | unsigned int pio_mask; | |
305 | unsigned int mwdma_mask; | |
306 | unsigned int udma_mask; | |
307 | unsigned int legacy_mode; | |
308 | unsigned long irq; | |
309 | unsigned int irq_flags; | |
310 | unsigned long host_flags; | |
4e5ec5db | 311 | unsigned long host_set_flags; |
1da177e4 LT |
312 | void __iomem *mmio_base; |
313 | void *private_data; | |
314 | }; | |
315 | ||
316 | struct ata_host_set { | |
317 | spinlock_t lock; | |
318 | struct device *dev; | |
319 | unsigned long irq; | |
320 | void __iomem *mmio_base; | |
321 | unsigned int n_ports; | |
322 | void *private_data; | |
057ace5e | 323 | const struct ata_port_operations *ops; |
5444a6f4 AC |
324 | unsigned long flags; |
325 | int simplex_claimed; /* Keep seperate in case we | |
326 | ever need to do this locked */ | |
1da177e4 LT |
327 | struct ata_port * ports[0]; |
328 | }; | |
329 | ||
330 | struct ata_queued_cmd { | |
331 | struct ata_port *ap; | |
332 | struct ata_device *dev; | |
333 | ||
334 | struct scsi_cmnd *scsicmd; | |
335 | void (*scsidone)(struct scsi_cmnd *); | |
336 | ||
337 | struct ata_taskfile tf; | |
338 | u8 cdb[ATAPI_CDB_LEN]; | |
339 | ||
340 | unsigned long flags; /* ATA_QCFLAG_xxx */ | |
341 | unsigned int tag; | |
342 | unsigned int n_elem; | |
cedc9a47 | 343 | unsigned int orig_n_elem; |
1da177e4 LT |
344 | |
345 | int dma_dir; | |
346 | ||
cedc9a47 JG |
347 | unsigned int pad_len; |
348 | ||
1da177e4 LT |
349 | unsigned int nsect; |
350 | unsigned int cursect; | |
351 | ||
352 | unsigned int nbytes; | |
353 | unsigned int curbytes; | |
354 | ||
355 | unsigned int cursg; | |
356 | unsigned int cursg_ofs; | |
357 | ||
358 | struct scatterlist sgent; | |
cedc9a47 | 359 | struct scatterlist pad_sgent; |
1da177e4 LT |
360 | void *buf_virt; |
361 | ||
cedc9a47 JG |
362 | /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ |
363 | struct scatterlist *__sg; | |
1da177e4 | 364 | |
a22e2eb0 | 365 | unsigned int err_mask; |
e61e0672 | 366 | struct ata_taskfile result_tf; |
1da177e4 LT |
367 | ata_qc_cb_t complete_fn; |
368 | ||
1da177e4 LT |
369 | void *private_data; |
370 | }; | |
371 | ||
372 | struct ata_host_stats { | |
373 | unsigned long unhandled_irq; | |
374 | unsigned long idle_irq; | |
375 | unsigned long rw_reqbuf; | |
376 | }; | |
377 | ||
378 | struct ata_device { | |
38d87234 | 379 | struct ata_port *ap; |
1da177e4 LT |
380 | u64 n_sectors; /* size of device, if ATA */ |
381 | unsigned long flags; /* ATA_DFLAG_xxx */ | |
382 | unsigned int class; /* ATA_DEV_xxx */ | |
383 | unsigned int devno; /* 0 or 1 */ | |
fe635c7e | 384 | u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ |
1da177e4 LT |
385 | u8 pio_mode; |
386 | u8 dma_mode; | |
387 | u8 xfer_mode; | |
388 | unsigned int xfer_shift; /* ATA_SHIFT_xxx */ | |
389 | ||
8cbd6df1 AL |
390 | unsigned int multi_count; /* sectors count for |
391 | READ/WRITE MULTIPLE */ | |
b00eec1d | 392 | unsigned int max_sectors; /* per-device max sectors */ |
6e7846e9 | 393 | unsigned int cdb_len; |
8bf62ece | 394 | |
acf356b1 TH |
395 | /* per-dev xfer mask */ |
396 | unsigned int pio_mask; | |
397 | unsigned int mwdma_mask; | |
398 | unsigned int udma_mask; | |
399 | ||
8bf62ece AL |
400 | /* for CHS addressing */ |
401 | u16 cylinders; /* Number of cylinders */ | |
402 | u16 heads; /* Number of heads */ | |
403 | u16 sectors; /* Number of sectors per track */ | |
1da177e4 LT |
404 | }; |
405 | ||
406 | struct ata_port { | |
407 | struct Scsi_Host *host; /* our co-allocated scsi host */ | |
057ace5e | 408 | const struct ata_port_operations *ops; |
1da177e4 LT |
409 | unsigned long flags; /* ATA_FLAG_xxx */ |
410 | unsigned int id; /* unique id req'd by scsi midlyr */ | |
411 | unsigned int port_no; /* unique port #; from zero */ | |
412 | unsigned int hard_port_no; /* hardware port #; from zero */ | |
413 | ||
414 | struct ata_prd *prd; /* our SG list */ | |
415 | dma_addr_t prd_dma; /* and its DMA mapping */ | |
416 | ||
cedc9a47 JG |
417 | void *pad; /* array of DMA pad buffers */ |
418 | dma_addr_t pad_dma; | |
419 | ||
1da177e4 LT |
420 | struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ |
421 | ||
422 | u8 ctl; /* cache of ATA control register */ | |
423 | u8 last_ctl; /* Cache last written value */ | |
1da177e4 LT |
424 | unsigned int pio_mask; |
425 | unsigned int mwdma_mask; | |
426 | unsigned int udma_mask; | |
427 | unsigned int cbl; /* cable type; ATA_CBL_xxx */ | |
1c3fae4d | 428 | unsigned int sata_spd_limit; /* SATA PHY speed limit */ |
1da177e4 LT |
429 | |
430 | struct ata_device device[ATA_MAX_DEVICES]; | |
431 | ||
432 | struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; | |
433 | unsigned long qactive; | |
434 | unsigned int active_tag; | |
435 | ||
436 | struct ata_host_stats stats; | |
437 | struct ata_host_set *host_set; | |
2f1f610b | 438 | struct device *dev; |
1da177e4 | 439 | |
86e45b6b TH |
440 | struct work_struct port_task; |
441 | ||
14be71f4 | 442 | unsigned int hsm_task_state; |
1da177e4 LT |
443 | unsigned long pio_task_timeout; |
444 | ||
bfd60579 | 445 | u32 msg_enable; |
a72ec4ce | 446 | struct list_head eh_done_q; |
bfd60579 | 447 | |
1da177e4 | 448 | void *private_data; |
fe635c7e TH |
449 | |
450 | u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ | |
1da177e4 LT |
451 | }; |
452 | ||
453 | struct ata_port_operations { | |
454 | void (*port_disable) (struct ata_port *); | |
455 | ||
456 | void (*dev_config) (struct ata_port *, struct ata_device *); | |
457 | ||
458 | void (*set_piomode) (struct ata_port *, struct ata_device *); | |
459 | void (*set_dmamode) (struct ata_port *, struct ata_device *); | |
5444a6f4 | 460 | unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long); |
1da177e4 | 461 | |
057ace5e | 462 | void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 LT |
463 | void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); |
464 | ||
057ace5e | 465 | void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 LT |
466 | u8 (*check_status)(struct ata_port *ap); |
467 | u8 (*check_altstatus)(struct ata_port *ap); | |
1da177e4 LT |
468 | void (*dev_select)(struct ata_port *ap, unsigned int device); |
469 | ||
c19ba8af | 470 | void (*phy_reset) (struct ata_port *ap); /* obsolete */ |
e35a9e01 | 471 | void (*set_mode) (struct ata_port *ap); |
c19ba8af TH |
472 | int (*probe_reset) (struct ata_port *ap, unsigned int *classes); |
473 | ||
1da177e4 LT |
474 | void (*post_set_mode) (struct ata_port *ap); |
475 | ||
476 | int (*check_atapi_dma) (struct ata_queued_cmd *qc); | |
477 | ||
478 | void (*bmdma_setup) (struct ata_queued_cmd *qc); | |
479 | void (*bmdma_start) (struct ata_queued_cmd *qc); | |
480 | ||
481 | void (*qc_prep) (struct ata_queued_cmd *qc); | |
9a3d9eb0 | 482 | unsigned int (*qc_issue) (struct ata_queued_cmd *qc); |
1da177e4 | 483 | |
9ec957f2 TH |
484 | /* Error handlers. ->error_handler overrides ->eng_timeout and |
485 | * indicates that new-style EH is in place. | |
486 | */ | |
487 | void (*eng_timeout) (struct ata_port *ap); /* obsolete */ | |
488 | ||
489 | void (*freeze) (struct ata_port *ap); | |
490 | void (*thaw) (struct ata_port *ap); | |
491 | void (*error_handler) (struct ata_port *ap); | |
492 | void (*post_internal_cmd) (struct ata_queued_cmd *qc); | |
1da177e4 LT |
493 | |
494 | irqreturn_t (*irq_handler)(int, void *, struct pt_regs *); | |
495 | void (*irq_clear) (struct ata_port *); | |
496 | ||
497 | u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg); | |
498 | void (*scr_write) (struct ata_port *ap, unsigned int sc_reg, | |
499 | u32 val); | |
500 | ||
501 | int (*port_start) (struct ata_port *ap); | |
502 | void (*port_stop) (struct ata_port *ap); | |
503 | ||
504 | void (*host_stop) (struct ata_host_set *host_set); | |
505 | ||
b73fc89f | 506 | void (*bmdma_stop) (struct ata_queued_cmd *qc); |
1da177e4 LT |
507 | u8 (*bmdma_status) (struct ata_port *ap); |
508 | }; | |
509 | ||
510 | struct ata_port_info { | |
d0be4a7d | 511 | struct scsi_host_template *sht; |
1da177e4 LT |
512 | unsigned long host_flags; |
513 | unsigned long pio_mask; | |
514 | unsigned long mwdma_mask; | |
515 | unsigned long udma_mask; | |
057ace5e | 516 | const struct ata_port_operations *port_ops; |
e99f8b5e | 517 | void *private_data; |
1da177e4 LT |
518 | }; |
519 | ||
452503f9 AC |
520 | struct ata_timing { |
521 | unsigned short mode; /* ATA mode */ | |
522 | unsigned short setup; /* t1 */ | |
523 | unsigned short act8b; /* t2 for 8-bit I/O */ | |
524 | unsigned short rec8b; /* t2i for 8-bit I/O */ | |
525 | unsigned short cyc8b; /* t0 for 8-bit I/O */ | |
526 | unsigned short active; /* t2 or tD */ | |
527 | unsigned short recover; /* t2i or tK */ | |
528 | unsigned short cycle; /* t0 */ | |
529 | unsigned short udma; /* t2CYCTYP/2 */ | |
530 | }; | |
531 | ||
532 | #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) | |
1da177e4 LT |
533 | |
534 | extern void ata_port_probe(struct ata_port *); | |
535 | extern void __sata_phy_reset(struct ata_port *ap); | |
536 | extern void sata_phy_reset(struct ata_port *ap); | |
537 | extern void ata_bus_reset(struct ata_port *ap); | |
3c567b7d | 538 | extern int sata_set_spd(struct ata_port *ap); |
a62c0fc5 | 539 | extern int ata_drive_probe_reset(struct ata_port *ap, |
7944ea95 | 540 | ata_probeinit_fn_t probeinit, |
a62c0fc5 TH |
541 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
542 | ata_postreset_fn_t postreset, unsigned int *classes); | |
8a19ac89 | 543 | extern void ata_std_probeinit(struct ata_port *ap); |
2bf2cb26 TH |
544 | extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes); |
545 | extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class); | |
c2bd5804 | 546 | extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes); |
3373efd8 | 547 | extern int ata_dev_revalidate(struct ata_device *dev, int post_reset); |
1da177e4 LT |
548 | extern void ata_port_disable(struct ata_port *); |
549 | extern void ata_std_ports(struct ata_ioports *ioaddr); | |
550 | #ifdef CONFIG_PCI | |
551 | extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, | |
552 | unsigned int n_ports); | |
553 | extern void ata_pci_remove_one (struct pci_dev *pdev); | |
9b847548 JA |
554 | extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state); |
555 | extern int ata_pci_device_resume(struct pci_dev *pdev); | |
17bb34a3 | 556 | extern int ata_pci_clear_simplex(struct pci_dev *pdev); |
1da177e4 | 557 | #endif /* CONFIG_PCI */ |
057ace5e | 558 | extern int ata_device_add(const struct ata_probe_ent *ent); |
17b14451 | 559 | extern void ata_host_set_remove(struct ata_host_set *host_set); |
193515d5 | 560 | extern int ata_scsi_detect(struct scsi_host_template *sht); |
1da177e4 LT |
561 | extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); |
562 | extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); | |
1da177e4 LT |
563 | extern int ata_scsi_release(struct Scsi_Host *host); |
564 | extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); | |
34bf2170 TH |
565 | extern int sata_scr_valid(struct ata_port *ap); |
566 | extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val); | |
567 | extern int sata_scr_write(struct ata_port *ap, int reg, u32 val); | |
568 | extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val); | |
569 | extern int ata_port_online(struct ata_port *ap); | |
570 | extern int ata_port_offline(struct ata_port *ap); | |
9b847548 | 571 | extern int ata_scsi_device_resume(struct scsi_device *); |
082776e4 | 572 | extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state); |
3373efd8 TH |
573 | extern int ata_device_resume(struct ata_device *); |
574 | extern int ata_device_suspend(struct ata_device *, pm_message_t state); | |
67846b30 | 575 | extern int ata_ratelimit(void); |
6f8b9958 TH |
576 | extern unsigned int ata_busy_sleep(struct ata_port *ap, |
577 | unsigned long timeout_pat, | |
578 | unsigned long timeout); | |
86e45b6b TH |
579 | extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), |
580 | void *data, unsigned long delay); | |
c22daff4 TH |
581 | extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, |
582 | unsigned long interval_msec, | |
583 | unsigned long timeout_msec); | |
67846b30 | 584 | |
1da177e4 LT |
585 | /* |
586 | * Default driver ops implementations | |
587 | */ | |
057ace5e | 588 | extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); |
1da177e4 | 589 | extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); |
057ace5e JG |
590 | extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp); |
591 | extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); | |
1da177e4 LT |
592 | extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); |
593 | extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); | |
594 | extern u8 ata_check_status(struct ata_port *ap); | |
595 | extern u8 ata_altstatus(struct ata_port *ap); | |
057ace5e | 596 | extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); |
c2bd5804 | 597 | extern int ata_std_probe_reset(struct ata_port *ap, unsigned int *classes); |
1da177e4 LT |
598 | extern int ata_port_start (struct ata_port *ap); |
599 | extern void ata_port_stop (struct ata_port *ap); | |
aa8f0dc6 | 600 | extern void ata_host_stop (struct ata_host_set *host_set); |
1da177e4 LT |
601 | extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs); |
602 | extern void ata_qc_prep(struct ata_queued_cmd *qc); | |
e46834cd | 603 | extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); |
9a3d9eb0 | 604 | extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); |
1da177e4 LT |
605 | extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, |
606 | unsigned int buflen); | |
607 | extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, | |
608 | unsigned int n_elem); | |
057ace5e | 609 | extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); |
6a62a04d TH |
610 | extern void ata_id_string(const u16 *id, unsigned char *s, |
611 | unsigned int ofs, unsigned int len); | |
612 | extern void ata_id_c_string(const u16 *id, unsigned char *s, | |
613 | unsigned int ofs, unsigned int len); | |
1da177e4 LT |
614 | extern void ata_bmdma_setup (struct ata_queued_cmd *qc); |
615 | extern void ata_bmdma_start (struct ata_queued_cmd *qc); | |
b73fc89f | 616 | extern void ata_bmdma_stop(struct ata_queued_cmd *qc); |
1da177e4 LT |
617 | extern u8 ata_bmdma_status(struct ata_port *ap); |
618 | extern void ata_bmdma_irq_clear(struct ata_port *ap); | |
f686bcb8 | 619 | extern void ata_qc_complete(struct ata_queued_cmd *qc); |
3373efd8 | 620 | extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
1da177e4 LT |
621 | void (*done)(struct scsi_cmnd *)); |
622 | extern int ata_std_bios_param(struct scsi_device *sdev, | |
623 | struct block_device *bdev, | |
624 | sector_t capacity, int geom[]); | |
625 | extern int ata_scsi_slave_config(struct scsi_device *sdev); | |
3373efd8 | 626 | extern struct ata_device *ata_dev_pair(struct ata_device *adev); |
1da177e4 | 627 | |
452503f9 AC |
628 | /* |
629 | * Timing helpers | |
630 | */ | |
1bc4ccff AC |
631 | |
632 | extern unsigned int ata_pio_need_iordy(const struct ata_device *); | |
452503f9 AC |
633 | extern int ata_timing_compute(struct ata_device *, unsigned short, |
634 | struct ata_timing *, int, int); | |
635 | extern void ata_timing_merge(const struct ata_timing *, | |
636 | const struct ata_timing *, struct ata_timing *, | |
637 | unsigned int); | |
638 | ||
639 | enum { | |
640 | ATA_TIMING_SETUP = (1 << 0), | |
641 | ATA_TIMING_ACT8B = (1 << 1), | |
642 | ATA_TIMING_REC8B = (1 << 2), | |
643 | ATA_TIMING_CYC8B = (1 << 3), | |
644 | ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | | |
645 | ATA_TIMING_CYC8B, | |
646 | ATA_TIMING_ACTIVE = (1 << 4), | |
647 | ATA_TIMING_RECOVER = (1 << 5), | |
648 | ATA_TIMING_CYCLE = (1 << 6), | |
649 | ATA_TIMING_UDMA = (1 << 7), | |
650 | ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | | |
651 | ATA_TIMING_REC8B | ATA_TIMING_CYC8B | | |
652 | ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | | |
653 | ATA_TIMING_CYCLE | ATA_TIMING_UDMA, | |
654 | }; | |
655 | ||
1da177e4 LT |
656 | |
657 | #ifdef CONFIG_PCI | |
658 | struct pci_bits { | |
659 | unsigned int reg; /* PCI config register to read */ | |
660 | unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ | |
661 | unsigned long mask; | |
662 | unsigned long val; | |
663 | }; | |
664 | ||
374b1873 | 665 | extern void ata_pci_host_stop (struct ata_host_set *host_set); |
1da177e4 | 666 | extern struct ata_probe_ent * |
47a86593 | 667 | ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask); |
057ace5e | 668 | extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); |
17bb34a3 | 669 | extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long); |
1da177e4 LT |
670 | #endif /* CONFIG_PCI */ |
671 | ||
ece1d636 TH |
672 | /* |
673 | * EH | |
674 | */ | |
ece1d636 | 675 | extern void ata_eng_timeout(struct ata_port *ap); |
7b70fc03 TH |
676 | |
677 | extern void ata_port_schedule_eh(struct ata_port *ap); | |
678 | extern int ata_port_abort(struct ata_port *ap); | |
e3180499 TH |
679 | extern int ata_port_freeze(struct ata_port *ap); |
680 | ||
681 | extern void ata_eh_freeze_port(struct ata_port *ap); | |
682 | extern void ata_eh_thaw_port(struct ata_port *ap); | |
7b70fc03 | 683 | |
ece1d636 TH |
684 | extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); |
685 | extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); | |
686 | ||
61440db6 TH |
687 | /* |
688 | * printk helpers | |
689 | */ | |
690 | #define ata_port_printk(ap, lv, fmt, args...) \ | |
691 | printk(lv"ata%u: "fmt, (ap)->id , ##args) | |
692 | ||
693 | #define ata_dev_printk(dev, lv, fmt, args...) \ | |
694 | printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args) | |
1da177e4 | 695 | |
61440db6 TH |
696 | /* |
697 | * qc helpers | |
698 | */ | |
972c26bd JG |
699 | static inline int |
700 | ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) | |
701 | { | |
702 | if (sg == &qc->pad_sgent) | |
703 | return 1; | |
704 | if (qc->pad_len) | |
705 | return 0; | |
706 | if (((sg - qc->__sg) + 1) == qc->n_elem) | |
707 | return 1; | |
708 | return 0; | |
709 | } | |
710 | ||
cc1887f3 TH |
711 | static inline struct scatterlist * |
712 | ata_qc_first_sg(struct ata_queued_cmd *qc) | |
713 | { | |
714 | if (qc->n_elem) | |
715 | return qc->__sg; | |
716 | if (qc->pad_len) | |
717 | return &qc->pad_sgent; | |
718 | return NULL; | |
719 | } | |
720 | ||
cedc9a47 JG |
721 | static inline struct scatterlist * |
722 | ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) | |
723 | { | |
724 | if (sg == &qc->pad_sgent) | |
725 | return NULL; | |
726 | if (++sg - qc->__sg < qc->n_elem) | |
727 | return sg; | |
cc1887f3 TH |
728 | if (qc->pad_len) |
729 | return &qc->pad_sgent; | |
730 | return NULL; | |
cedc9a47 JG |
731 | } |
732 | ||
733 | #define ata_for_each_sg(sg, qc) \ | |
cc1887f3 | 734 | for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) |
cedc9a47 | 735 | |
1da177e4 LT |
736 | static inline unsigned int ata_tag_valid(unsigned int tag) |
737 | { | |
738 | return (tag < ATA_MAX_QUEUE) ? 1 : 0; | |
739 | } | |
740 | ||
2ab7db1f TH |
741 | static inline unsigned int ata_tag_internal(unsigned int tag) |
742 | { | |
743 | return tag == ATA_MAX_QUEUE - 1; | |
744 | } | |
745 | ||
e1211e3f | 746 | static inline unsigned int ata_class_enabled(unsigned int class) |
597afd21 TH |
747 | { |
748 | return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; | |
749 | } | |
750 | ||
e1211e3f | 751 | static inline unsigned int ata_class_disabled(unsigned int class) |
1da177e4 | 752 | { |
e1211e3f TH |
753 | return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; |
754 | } | |
755 | ||
002c8054 TH |
756 | static inline unsigned int ata_class_absent(unsigned int class) |
757 | { | |
758 | return !ata_class_enabled(class) && !ata_class_disabled(class); | |
759 | } | |
760 | ||
e1211e3f TH |
761 | static inline unsigned int ata_dev_enabled(const struct ata_device *dev) |
762 | { | |
763 | return ata_class_enabled(dev->class); | |
764 | } | |
765 | ||
766 | static inline unsigned int ata_dev_disabled(const struct ata_device *dev) | |
767 | { | |
768 | return ata_class_disabled(dev->class); | |
1da177e4 LT |
769 | } |
770 | ||
002c8054 TH |
771 | static inline unsigned int ata_dev_absent(const struct ata_device *dev) |
772 | { | |
773 | return ata_class_absent(dev->class); | |
774 | } | |
775 | ||
1da177e4 LT |
776 | static inline u8 ata_chk_status(struct ata_port *ap) |
777 | { | |
778 | return ap->ops->check_status(ap); | |
779 | } | |
780 | ||
0baab86b EF |
781 | |
782 | /** | |
783 | * ata_pause - Flush writes and pause 400 nanoseconds. | |
784 | * @ap: Port to wait for. | |
785 | * | |
786 | * LOCKING: | |
787 | * Inherited from caller. | |
788 | */ | |
789 | ||
1da177e4 LT |
790 | static inline void ata_pause(struct ata_port *ap) |
791 | { | |
792 | ata_altstatus(ap); | |
793 | ndelay(400); | |
794 | } | |
795 | ||
0baab86b EF |
796 | |
797 | /** | |
798 | * ata_busy_wait - Wait for a port status register | |
799 | * @ap: Port to wait for. | |
800 | * | |
801 | * Waits up to max*10 microseconds for the selected bits in the port's | |
802 | * status register to be cleared. | |
803 | * Returns final value of status register. | |
804 | * | |
805 | * LOCKING: | |
806 | * Inherited from caller. | |
807 | */ | |
808 | ||
1da177e4 LT |
809 | static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, |
810 | unsigned int max) | |
811 | { | |
812 | u8 status; | |
813 | ||
814 | do { | |
815 | udelay(10); | |
816 | status = ata_chk_status(ap); | |
817 | max--; | |
818 | } while ((status & bits) && (max > 0)); | |
819 | ||
820 | return status; | |
821 | } | |
822 | ||
0baab86b EF |
823 | |
824 | /** | |
825 | * ata_wait_idle - Wait for a port to be idle. | |
826 | * @ap: Port to wait for. | |
827 | * | |
828 | * Waits up to 10ms for port's BUSY and DRQ signals to clear. | |
829 | * Returns final value of status register. | |
830 | * | |
831 | * LOCKING: | |
832 | * Inherited from caller. | |
833 | */ | |
834 | ||
1da177e4 LT |
835 | static inline u8 ata_wait_idle(struct ata_port *ap) |
836 | { | |
837 | u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); | |
838 | ||
839 | if (status & (ATA_BUSY | ATA_DRQ)) { | |
840 | unsigned long l = ap->ioaddr.status_addr; | |
bfd60579 RD |
841 | if (ata_msg_warn(ap)) |
842 | printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n", | |
843 | status, l); | |
1da177e4 LT |
844 | } |
845 | ||
846 | return status; | |
847 | } | |
848 | ||
849 | static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) | |
850 | { | |
851 | qc->tf.ctl |= ATA_NIEN; | |
852 | } | |
853 | ||
f69499f4 TH |
854 | static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, |
855 | unsigned int tag) | |
1da177e4 LT |
856 | { |
857 | if (likely(ata_tag_valid(tag))) | |
858 | return &ap->qcmd[tag]; | |
859 | return NULL; | |
860 | } | |
861 | ||
f69499f4 TH |
862 | static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, |
863 | unsigned int tag) | |
864 | { | |
865 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); | |
866 | ||
867 | if (unlikely(!qc) || !ap->ops->error_handler) | |
868 | return qc; | |
869 | ||
870 | if ((qc->flags & (ATA_QCFLAG_ACTIVE | | |
871 | ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) | |
872 | return qc; | |
873 | ||
874 | return NULL; | |
875 | } | |
876 | ||
3373efd8 | 877 | static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) |
1da177e4 LT |
878 | { |
879 | memset(tf, 0, sizeof(*tf)); | |
880 | ||
3373efd8 TH |
881 | tf->ctl = dev->ap->ctl; |
882 | if (dev->devno == 0) | |
1da177e4 LT |
883 | tf->device = ATA_DEVICE_OBS; |
884 | else | |
885 | tf->device = ATA_DEVICE_OBS | ATA_DEV1; | |
886 | } | |
887 | ||
2c13b7ce JG |
888 | static inline void ata_qc_reinit(struct ata_queued_cmd *qc) |
889 | { | |
890 | qc->__sg = NULL; | |
891 | qc->flags = 0; | |
892 | qc->cursect = qc->cursg = qc->cursg_ofs = 0; | |
893 | qc->nsect = 0; | |
894 | qc->nbytes = qc->curbytes = 0; | |
a22e2eb0 | 895 | qc->err_mask = 0; |
2c13b7ce | 896 | |
3373efd8 | 897 | ata_tf_init(qc->dev, &qc->tf); |
e61e0672 TH |
898 | |
899 | /* init result_tf such that it indicates normal completion */ | |
900 | qc->result_tf.command = ATA_DRDY; | |
901 | qc->result_tf.feature = 0; | |
2c13b7ce JG |
902 | } |
903 | ||
0baab86b EF |
904 | /** |
905 | * ata_irq_on - Enable interrupts on a port. | |
906 | * @ap: Port on which interrupts are enabled. | |
907 | * | |
908 | * Enable interrupts on a legacy IDE device using MMIO or PIO, | |
909 | * wait for idle, clear any pending interrupts. | |
910 | * | |
911 | * LOCKING: | |
912 | * Inherited from caller. | |
913 | */ | |
914 | ||
1da177e4 LT |
915 | static inline u8 ata_irq_on(struct ata_port *ap) |
916 | { | |
917 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
918 | u8 tmp; | |
919 | ||
920 | ap->ctl &= ~ATA_NIEN; | |
921 | ap->last_ctl = ap->ctl; | |
922 | ||
923 | if (ap->flags & ATA_FLAG_MMIO) | |
924 | writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); | |
925 | else | |
926 | outb(ap->ctl, ioaddr->ctl_addr); | |
927 | tmp = ata_wait_idle(ap); | |
928 | ||
929 | ap->ops->irq_clear(ap); | |
930 | ||
931 | return tmp; | |
932 | } | |
933 | ||
0baab86b EF |
934 | |
935 | /** | |
936 | * ata_irq_ack - Acknowledge a device interrupt. | |
937 | * @ap: Port on which interrupts are enabled. | |
938 | * | |
939 | * Wait up to 10 ms for legacy IDE device to become idle (BUSY | |
940 | * or BUSY+DRQ clear). Obtain dma status and port status from | |
941 | * device. Clear the interrupt. Return port status. | |
942 | * | |
943 | * LOCKING: | |
944 | */ | |
945 | ||
1da177e4 LT |
946 | static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq) |
947 | { | |
948 | unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY; | |
949 | u8 host_stat, post_stat, status; | |
950 | ||
951 | status = ata_busy_wait(ap, bits, 1000); | |
952 | if (status & bits) | |
bfd60579 RD |
953 | if (ata_msg_err(ap)) |
954 | printk(KERN_ERR "abnormal status 0x%X\n", status); | |
1da177e4 LT |
955 | |
956 | /* get controller status; clear intr, err bits */ | |
957 | if (ap->flags & ATA_FLAG_MMIO) { | |
958 | void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr; | |
959 | host_stat = readb(mmio + ATA_DMA_STATUS); | |
960 | writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, | |
961 | mmio + ATA_DMA_STATUS); | |
962 | ||
963 | post_stat = readb(mmio + ATA_DMA_STATUS); | |
964 | } else { | |
965 | host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
966 | outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR, | |
967 | ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
968 | ||
969 | post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); | |
970 | } | |
971 | ||
bfd60579 RD |
972 | if (ata_msg_intr(ap)) |
973 | printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n", | |
974 | __FUNCTION__, | |
975 | host_stat, post_stat, status); | |
1da177e4 LT |
976 | |
977 | return status; | |
978 | } | |
979 | ||
057ace5e | 980 | static inline int ata_try_flush_cache(const struct ata_device *dev) |
1da177e4 LT |
981 | { |
982 | return ata_id_wcache_enabled(dev->id) || | |
983 | ata_id_has_flush(dev->id) || | |
984 | ata_id_has_flush_ext(dev->id); | |
985 | } | |
986 | ||
a7dac447 JG |
987 | static inline unsigned int ac_err_mask(u8 status) |
988 | { | |
989 | if (status & ATA_BUSY) | |
11a56d24 | 990 | return AC_ERR_HSM; |
a7dac447 JG |
991 | if (status & (ATA_ERR | ATA_DF)) |
992 | return AC_ERR_DEV; | |
993 | return 0; | |
994 | } | |
995 | ||
996 | static inline unsigned int __ac_err_mask(u8 status) | |
997 | { | |
998 | unsigned int mask = ac_err_mask(status); | |
999 | if (mask == 0) | |
1000 | return AC_ERR_OTHER; | |
1001 | return mask; | |
1002 | } | |
1003 | ||
6037d6bb JG |
1004 | static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) |
1005 | { | |
1006 | ap->pad_dma = 0; | |
1007 | ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, | |
1008 | &ap->pad_dma, GFP_KERNEL); | |
1009 | return (ap->pad == NULL) ? -ENOMEM : 0; | |
1010 | } | |
1011 | ||
1012 | static inline void ata_pad_free(struct ata_port *ap, struct device *dev) | |
1013 | { | |
1014 | dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); | |
1015 | } | |
1016 | ||
35bb94b1 JG |
1017 | static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) |
1018 | { | |
1019 | return (struct ata_port *) &host->hostdata[0]; | |
1020 | } | |
1021 | ||
1da177e4 | 1022 | #endif /* __LINUX_LIBATA_H__ */ |