]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/linux/libata.h
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[libata] remove ata_chk_err(), ->check_err() hook.
[mirror_ubuntu-artful-kernel.git] / include / linux / libata.h
1 /*
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 *
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>
32 #include <asm/io.h>
33 #include <linux/ata.h>
34 #include <linux/workqueue.h>
35
36 /*
37 * compile-time options
38 */
39 #undef ATA_DEBUG /* debugging output */
40 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
41 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
42 #undef ATA_NDEBUG /* define to disable quick runtime checks */
43 #undef ATA_ENABLE_PATA /* define to enable PATA support in some
44 * low-level drivers */
45 #undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */
46
47
48 /* note: prints function name for you */
49 #ifdef ATA_DEBUG
50 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
51 #ifdef ATA_VERBOSE_DEBUG
52 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
53 #else
54 #define VPRINTK(fmt, args...)
55 #endif /* ATA_VERBOSE_DEBUG */
56 #else
57 #define DPRINTK(fmt, args...)
58 #define VPRINTK(fmt, args...)
59 #endif /* ATA_DEBUG */
60
61 #ifdef ATA_NDEBUG
62 #define assert(expr)
63 #else
64 #define assert(expr) \
65 if(unlikely(!(expr))) { \
66 printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
67 #expr,__FILE__,__FUNCTION__,__LINE__); \
68 }
69 #endif
70
71 /* defines only for the constants which don't work well as enums */
72 #define ATA_TAG_POISON 0xfafbfcfdU
73
74 /* move to PCI layer? */
75 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
76 {
77 return &pdev->dev;
78 }
79
80 enum {
81 /* various global constants */
82 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
83 ATA_MAX_PORTS = 8,
84 ATA_DEF_QUEUE = 1,
85 ATA_MAX_QUEUE = 1,
86 ATA_MAX_SECTORS = 200, /* FIXME */
87 ATA_MAX_BUS = 2,
88 ATA_DEF_BUSY_WAIT = 10000,
89 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
90
91 ATA_SHT_EMULATED = 1,
92 ATA_SHT_CMD_PER_LUN = 1,
93 ATA_SHT_THIS_ID = -1,
94 ATA_SHT_USE_CLUSTERING = 1,
95
96 /* struct ata_device stuff */
97 ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */
98 ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */
99 ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */
100 ATA_DFLAG_LBA = (1 << 3), /* device supports LBA */
101
102 ATA_DEV_UNKNOWN = 0, /* unknown device */
103 ATA_DEV_ATA = 1, /* ATA device */
104 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
105 ATA_DEV_ATAPI = 3, /* ATAPI device */
106 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
107 ATA_DEV_NONE = 5, /* no device */
108
109 /* struct ata_port flags */
110 ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */
111 /* (doesn't imply presence) */
112 ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */
113 ATA_FLAG_SATA = (1 << 3),
114 ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */
115 ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */
116 ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */
117 ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */
118 ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */
119 ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once
120 * proper HSM is in place. */
121
122 ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */
123 ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */
124 ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */
125 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
126
127 /* various lengths of time */
128 ATA_TMOUT_EDD = 5 * HZ, /* hueristic */
129 ATA_TMOUT_PIO = 30 * HZ,
130 ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */
131 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */
132 ATA_TMOUT_CDB = 30 * HZ,
133 ATA_TMOUT_CDB_QUICK = 5 * HZ,
134
135 /* ATA bus states */
136 BUS_UNKNOWN = 0,
137 BUS_DMA = 1,
138 BUS_IDLE = 2,
139 BUS_NOINTR = 3,
140 BUS_NODATA = 4,
141 BUS_TIMER = 5,
142 BUS_PIO = 6,
143 BUS_EDD = 7,
144 BUS_IDENTIFY = 8,
145 BUS_PACKET = 9,
146
147 /* SATA port states */
148 PORT_UNKNOWN = 0,
149 PORT_ENABLED = 1,
150 PORT_DISABLED = 2,
151
152 /* encoding various smaller bitmaps into a single
153 * unsigned long bitmap
154 */
155 ATA_SHIFT_UDMA = 0,
156 ATA_SHIFT_MWDMA = 8,
157 ATA_SHIFT_PIO = 11,
158
159 /* Masks for port functions */
160 ATA_PORT_PRIMARY = (1 << 0),
161 ATA_PORT_SECONDARY = (1 << 1),
162 };
163
164 enum hsm_task_states {
165 HSM_ST_UNKNOWN,
166 HSM_ST_IDLE,
167 HSM_ST_POLL,
168 HSM_ST_TMOUT,
169 HSM_ST,
170 HSM_ST_LAST,
171 HSM_ST_LAST_POLL,
172 HSM_ST_ERR,
173 };
174
175 /* forward declarations */
176 struct scsi_device;
177 struct ata_port_operations;
178 struct ata_port;
179 struct ata_queued_cmd;
180
181 /* typedefs */
182 typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, u8 drv_stat);
183
184 struct ata_ioports {
185 unsigned long cmd_addr;
186 unsigned long data_addr;
187 unsigned long error_addr;
188 unsigned long feature_addr;
189 unsigned long nsect_addr;
190 unsigned long lbal_addr;
191 unsigned long lbam_addr;
192 unsigned long lbah_addr;
193 unsigned long device_addr;
194 unsigned long status_addr;
195 unsigned long command_addr;
196 unsigned long altstatus_addr;
197 unsigned long ctl_addr;
198 unsigned long bmdma_addr;
199 unsigned long scr_addr;
200 };
201
202 struct ata_probe_ent {
203 struct list_head node;
204 struct device *dev;
205 const struct ata_port_operations *port_ops;
206 Scsi_Host_Template *sht;
207 struct ata_ioports port[ATA_MAX_PORTS];
208 unsigned int n_ports;
209 unsigned int hard_port_no;
210 unsigned int pio_mask;
211 unsigned int mwdma_mask;
212 unsigned int udma_mask;
213 unsigned int legacy_mode;
214 unsigned long irq;
215 unsigned int irq_flags;
216 unsigned long host_flags;
217 void __iomem *mmio_base;
218 void *private_data;
219 };
220
221 struct ata_host_set {
222 spinlock_t lock;
223 struct device *dev;
224 unsigned long irq;
225 void __iomem *mmio_base;
226 unsigned int n_ports;
227 void *private_data;
228 const struct ata_port_operations *ops;
229 struct ata_port * ports[0];
230 };
231
232 struct ata_queued_cmd {
233 struct ata_port *ap;
234 struct ata_device *dev;
235
236 struct scsi_cmnd *scsicmd;
237 void (*scsidone)(struct scsi_cmnd *);
238
239 struct ata_taskfile tf;
240 u8 cdb[ATAPI_CDB_LEN];
241
242 unsigned long flags; /* ATA_QCFLAG_xxx */
243 unsigned int tag;
244 unsigned int n_elem;
245
246 int dma_dir;
247
248 unsigned int nsect;
249 unsigned int cursect;
250
251 unsigned int nbytes;
252 unsigned int curbytes;
253
254 unsigned int cursg;
255 unsigned int cursg_ofs;
256
257 struct scatterlist sgent;
258 void *buf_virt;
259
260 struct scatterlist *sg;
261
262 ata_qc_cb_t complete_fn;
263
264 struct completion *waiting;
265
266 void *private_data;
267 };
268
269 struct ata_host_stats {
270 unsigned long unhandled_irq;
271 unsigned long idle_irq;
272 unsigned long rw_reqbuf;
273 };
274
275 struct ata_device {
276 u64 n_sectors; /* size of device, if ATA */
277 unsigned long flags; /* ATA_DFLAG_xxx */
278 unsigned int class; /* ATA_DEV_xxx */
279 unsigned int devno; /* 0 or 1 */
280 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
281 u8 pio_mode;
282 u8 dma_mode;
283 u8 xfer_mode;
284 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
285
286 unsigned int multi_count; /* sectors count for
287 READ/WRITE MULTIPLE */
288
289 /* for CHS addressing */
290 u16 cylinders; /* Number of cylinders */
291 u16 heads; /* Number of heads */
292 u16 sectors; /* Number of sectors per track */
293 };
294
295 struct ata_port {
296 struct Scsi_Host *host; /* our co-allocated scsi host */
297 const struct ata_port_operations *ops;
298 unsigned long flags; /* ATA_FLAG_xxx */
299 unsigned int id; /* unique id req'd by scsi midlyr */
300 unsigned int port_no; /* unique port #; from zero */
301 unsigned int hard_port_no; /* hardware port #; from zero */
302
303 struct ata_prd *prd; /* our SG list */
304 dma_addr_t prd_dma; /* and its DMA mapping */
305
306 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
307
308 u8 ctl; /* cache of ATA control register */
309 u8 last_ctl; /* Cache last written value */
310 unsigned int bus_state;
311 unsigned int port_state;
312 unsigned int pio_mask;
313 unsigned int mwdma_mask;
314 unsigned int udma_mask;
315 unsigned int cbl; /* cable type; ATA_CBL_xxx */
316 unsigned int cdb_len;
317
318 struct ata_device device[ATA_MAX_DEVICES];
319
320 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
321 unsigned long qactive;
322 unsigned int active_tag;
323
324 struct ata_host_stats stats;
325 struct ata_host_set *host_set;
326
327 struct work_struct packet_task;
328
329 struct work_struct pio_task;
330 unsigned int hsm_task_state;
331 unsigned long pio_task_timeout;
332
333 void *private_data;
334 };
335
336 struct ata_port_operations {
337 void (*port_disable) (struct ata_port *);
338
339 void (*dev_config) (struct ata_port *, struct ata_device *);
340
341 void (*set_piomode) (struct ata_port *, struct ata_device *);
342 void (*set_dmamode) (struct ata_port *, struct ata_device *);
343
344 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
345 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
346
347 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
348 u8 (*check_status)(struct ata_port *ap);
349 u8 (*check_altstatus)(struct ata_port *ap);
350 void (*dev_select)(struct ata_port *ap, unsigned int device);
351
352 void (*phy_reset) (struct ata_port *ap);
353 void (*post_set_mode) (struct ata_port *ap);
354
355 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
356
357 void (*bmdma_setup) (struct ata_queued_cmd *qc);
358 void (*bmdma_start) (struct ata_queued_cmd *qc);
359
360 void (*qc_prep) (struct ata_queued_cmd *qc);
361 int (*qc_issue) (struct ata_queued_cmd *qc);
362
363 void (*eng_timeout) (struct ata_port *ap);
364
365 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
366 void (*irq_clear) (struct ata_port *);
367
368 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
369 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
370 u32 val);
371
372 int (*port_start) (struct ata_port *ap);
373 void (*port_stop) (struct ata_port *ap);
374
375 void (*host_stop) (struct ata_host_set *host_set);
376
377 void (*bmdma_stop) (struct ata_queued_cmd *qc);
378 u8 (*bmdma_status) (struct ata_port *ap);
379 };
380
381 struct ata_port_info {
382 Scsi_Host_Template *sht;
383 unsigned long host_flags;
384 unsigned long pio_mask;
385 unsigned long mwdma_mask;
386 unsigned long udma_mask;
387 const struct ata_port_operations *port_ops;
388 };
389
390 struct ata_timing {
391 unsigned short mode; /* ATA mode */
392 unsigned short setup; /* t1 */
393 unsigned short act8b; /* t2 for 8-bit I/O */
394 unsigned short rec8b; /* t2i for 8-bit I/O */
395 unsigned short cyc8b; /* t0 for 8-bit I/O */
396 unsigned short active; /* t2 or tD */
397 unsigned short recover; /* t2i or tK */
398 unsigned short cycle; /* t0 */
399 unsigned short udma; /* t2CYCTYP/2 */
400 };
401
402 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
403
404 extern void ata_port_probe(struct ata_port *);
405 extern void __sata_phy_reset(struct ata_port *ap);
406 extern void sata_phy_reset(struct ata_port *ap);
407 extern void ata_bus_reset(struct ata_port *ap);
408 extern void ata_port_disable(struct ata_port *);
409 extern void ata_std_ports(struct ata_ioports *ioaddr);
410 #ifdef CONFIG_PCI
411 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
412 unsigned int n_ports);
413 extern void ata_pci_remove_one (struct pci_dev *pdev);
414 #endif /* CONFIG_PCI */
415 extern int ata_device_add(const struct ata_probe_ent *ent);
416 extern void ata_host_set_remove(struct ata_host_set *host_set);
417 extern int ata_scsi_detect(Scsi_Host_Template *sht);
418 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
419 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
420 extern int ata_scsi_error(struct Scsi_Host *host);
421 extern int ata_scsi_release(struct Scsi_Host *host);
422 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
423 extern int ata_ratelimit(void);
424
425 /*
426 * Default driver ops implementations
427 */
428 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
429 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
430 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
431 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
432 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
433 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
434 extern u8 ata_check_status(struct ata_port *ap);
435 extern u8 ata_altstatus(struct ata_port *ap);
436 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
437 extern int ata_port_start (struct ata_port *ap);
438 extern void ata_port_stop (struct ata_port *ap);
439 extern void ata_host_stop (struct ata_host_set *host_set);
440 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
441 extern void ata_qc_prep(struct ata_queued_cmd *qc);
442 extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
443 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
444 unsigned int buflen);
445 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
446 unsigned int n_elem);
447 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
448 extern void ata_dev_id_string(const u16 *id, unsigned char *s,
449 unsigned int ofs, unsigned int len);
450 extern void ata_dev_config(struct ata_port *ap, unsigned int i);
451 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
452 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
453 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
454 extern u8 ata_bmdma_status(struct ata_port *ap);
455 extern void ata_bmdma_irq_clear(struct ata_port *ap);
456 extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat);
457 extern void ata_eng_timeout(struct ata_port *ap);
458 extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd,
459 void (*done)(struct scsi_cmnd *));
460 extern int ata_std_bios_param(struct scsi_device *sdev,
461 struct block_device *bdev,
462 sector_t capacity, int geom[]);
463 extern int ata_scsi_slave_config(struct scsi_device *sdev);
464
465 /*
466 * Timing helpers
467 */
468 extern int ata_timing_compute(struct ata_device *, unsigned short,
469 struct ata_timing *, int, int);
470 extern void ata_timing_merge(const struct ata_timing *,
471 const struct ata_timing *, struct ata_timing *,
472 unsigned int);
473
474 enum {
475 ATA_TIMING_SETUP = (1 << 0),
476 ATA_TIMING_ACT8B = (1 << 1),
477 ATA_TIMING_REC8B = (1 << 2),
478 ATA_TIMING_CYC8B = (1 << 3),
479 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
480 ATA_TIMING_CYC8B,
481 ATA_TIMING_ACTIVE = (1 << 4),
482 ATA_TIMING_RECOVER = (1 << 5),
483 ATA_TIMING_CYCLE = (1 << 6),
484 ATA_TIMING_UDMA = (1 << 7),
485 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
486 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
487 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
488 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
489 };
490
491
492 #ifdef CONFIG_PCI
493 struct pci_bits {
494 unsigned int reg; /* PCI config register to read */
495 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
496 unsigned long mask;
497 unsigned long val;
498 };
499
500 extern void ata_pci_host_stop (struct ata_host_set *host_set);
501 extern struct ata_probe_ent *
502 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
503 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
504
505 #endif /* CONFIG_PCI */
506
507
508 static inline unsigned int ata_tag_valid(unsigned int tag)
509 {
510 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
511 }
512
513 static inline unsigned int ata_dev_present(const struct ata_device *dev)
514 {
515 return ((dev->class == ATA_DEV_ATA) ||
516 (dev->class == ATA_DEV_ATAPI));
517 }
518
519 static inline u8 ata_chk_status(struct ata_port *ap)
520 {
521 return ap->ops->check_status(ap);
522 }
523
524
525 /**
526 * ata_pause - Flush writes and pause 400 nanoseconds.
527 * @ap: Port to wait for.
528 *
529 * LOCKING:
530 * Inherited from caller.
531 */
532
533 static inline void ata_pause(struct ata_port *ap)
534 {
535 ata_altstatus(ap);
536 ndelay(400);
537 }
538
539
540 /**
541 * ata_busy_wait - Wait for a port status register
542 * @ap: Port to wait for.
543 *
544 * Waits up to max*10 microseconds for the selected bits in the port's
545 * status register to be cleared.
546 * Returns final value of status register.
547 *
548 * LOCKING:
549 * Inherited from caller.
550 */
551
552 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
553 unsigned int max)
554 {
555 u8 status;
556
557 do {
558 udelay(10);
559 status = ata_chk_status(ap);
560 max--;
561 } while ((status & bits) && (max > 0));
562
563 return status;
564 }
565
566
567 /**
568 * ata_wait_idle - Wait for a port to be idle.
569 * @ap: Port to wait for.
570 *
571 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
572 * Returns final value of status register.
573 *
574 * LOCKING:
575 * Inherited from caller.
576 */
577
578 static inline u8 ata_wait_idle(struct ata_port *ap)
579 {
580 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
581
582 if (status & (ATA_BUSY | ATA_DRQ)) {
583 unsigned long l = ap->ioaddr.status_addr;
584 printk(KERN_WARNING
585 "ATA: abnormal status 0x%X on port 0x%lX\n",
586 status, l);
587 }
588
589 return status;
590 }
591
592 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
593 {
594 qc->tf.ctl |= ATA_NIEN;
595 }
596
597 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
598 unsigned int tag)
599 {
600 if (likely(ata_tag_valid(tag)))
601 return &ap->qcmd[tag];
602 return NULL;
603 }
604
605 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
606 {
607 memset(tf, 0, sizeof(*tf));
608
609 tf->ctl = ap->ctl;
610 if (device == 0)
611 tf->device = ATA_DEVICE_OBS;
612 else
613 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
614 }
615
616
617 /**
618 * ata_irq_on - Enable interrupts on a port.
619 * @ap: Port on which interrupts are enabled.
620 *
621 * Enable interrupts on a legacy IDE device using MMIO or PIO,
622 * wait for idle, clear any pending interrupts.
623 *
624 * LOCKING:
625 * Inherited from caller.
626 */
627
628 static inline u8 ata_irq_on(struct ata_port *ap)
629 {
630 struct ata_ioports *ioaddr = &ap->ioaddr;
631 u8 tmp;
632
633 ap->ctl &= ~ATA_NIEN;
634 ap->last_ctl = ap->ctl;
635
636 if (ap->flags & ATA_FLAG_MMIO)
637 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
638 else
639 outb(ap->ctl, ioaddr->ctl_addr);
640 tmp = ata_wait_idle(ap);
641
642 ap->ops->irq_clear(ap);
643
644 return tmp;
645 }
646
647
648 /**
649 * ata_irq_ack - Acknowledge a device interrupt.
650 * @ap: Port on which interrupts are enabled.
651 *
652 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
653 * or BUSY+DRQ clear). Obtain dma status and port status from
654 * device. Clear the interrupt. Return port status.
655 *
656 * LOCKING:
657 */
658
659 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
660 {
661 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
662 u8 host_stat, post_stat, status;
663
664 status = ata_busy_wait(ap, bits, 1000);
665 if (status & bits)
666 DPRINTK("abnormal status 0x%X\n", status);
667
668 /* get controller status; clear intr, err bits */
669 if (ap->flags & ATA_FLAG_MMIO) {
670 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
671 host_stat = readb(mmio + ATA_DMA_STATUS);
672 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
673 mmio + ATA_DMA_STATUS);
674
675 post_stat = readb(mmio + ATA_DMA_STATUS);
676 } else {
677 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
678 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
679 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
680
681 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
682 }
683
684 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
685 host_stat, post_stat, status);
686
687 return status;
688 }
689
690 static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
691 {
692 return ap->ops->scr_read(ap, reg);
693 }
694
695 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
696 {
697 ap->ops->scr_write(ap, reg, val);
698 }
699
700 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
701 u32 val)
702 {
703 ap->ops->scr_write(ap, reg, val);
704 (void) ap->ops->scr_read(ap, reg);
705 }
706
707 static inline unsigned int sata_dev_present(struct ata_port *ap)
708 {
709 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
710 }
711
712 static inline int ata_try_flush_cache(const struct ata_device *dev)
713 {
714 return ata_id_wcache_enabled(dev->id) ||
715 ata_id_has_flush(dev->id) ||
716 ata_id_has_flush_ext(dev->id);
717 }
718
719 #endif /* __LINUX_LIBATA_H__ */
Ubuntu Artful kernel mirror