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[libata] __iomem annotations for various drivers
[mirror_ubuntu-focal-kernel.git] / include / linux / libata.h
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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>
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_ATAPI /* define to enable ATAPI support */
44#undef ATA_ENABLE_PATA /* define to enable PATA support in some
45 * low-level drivers */
46#undef ATAPI_ENABLE_DMADIR /* enables ATAPI DMADIR bridge support */
47
48
49/* note: prints function name for you */
50#ifdef ATA_DEBUG
51#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
52#ifdef ATA_VERBOSE_DEBUG
53#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
54#else
55#define VPRINTK(fmt, args...)
56#endif /* ATA_VERBOSE_DEBUG */
57#else
58#define DPRINTK(fmt, args...)
59#define VPRINTK(fmt, args...)
60#endif /* ATA_DEBUG */
61
62#ifdef ATA_NDEBUG
63#define assert(expr)
64#else
65#define assert(expr) \
66 if(unlikely(!(expr))) { \
67 printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
68 #expr,__FILE__,__FUNCTION__,__LINE__); \
69 }
70#endif
71
72/* defines only for the constants which don't work well as enums */
73#define ATA_TAG_POISON 0xfafbfcfdU
74
75/* move to PCI layer? */
76static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
77{
78 return &pdev->dev;
79}
80
81enum {
82 /* various global constants */
83 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
84 ATA_MAX_PORTS = 8,
85 ATA_DEF_QUEUE = 1,
86 ATA_MAX_QUEUE = 1,
87 ATA_MAX_SECTORS = 200, /* FIXME */
88 ATA_MAX_BUS = 2,
89 ATA_DEF_BUSY_WAIT = 10000,
90 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
91
92 ATA_SHT_EMULATED = 1,
93 ATA_SHT_CMD_PER_LUN = 1,
94 ATA_SHT_THIS_ID = -1,
95 ATA_SHT_USE_CLUSTERING = 0,
96
97 /* struct ata_device stuff */
98 ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */
99 ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */
100 ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */
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 */
c1389503
TH		 119 ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once
120 * proper HSM is in place. */
1da177e4
LT		 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
160enum pio_task_states {
161 PIO_ST_UNKNOWN,
162 PIO_ST_IDLE,
163 PIO_ST_POLL,
164 PIO_ST_TMOUT,
165 PIO_ST,
166 PIO_ST_LAST,
167 PIO_ST_LAST_POLL,
168 PIO_ST_ERR,
169};
170
171/* forward declarations */
172struct scsi_device;
173struct ata_port_operations;
174struct ata_port;
175struct ata_queued_cmd;
176
177/* typedefs */
178typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, u8 drv_stat);
179
180struct ata_ioports {
181 unsigned long cmd_addr;
182 unsigned long data_addr;
183 unsigned long error_addr;
184 unsigned long feature_addr;
185 unsigned long nsect_addr;
186 unsigned long lbal_addr;
187 unsigned long lbam_addr;
188 unsigned long lbah_addr;
189 unsigned long device_addr;
190 unsigned long status_addr;
191 unsigned long command_addr;
192 unsigned long altstatus_addr;
193 unsigned long ctl_addr;
194 unsigned long bmdma_addr;
195 unsigned long scr_addr;
196};
197
198struct ata_probe_ent {
199 struct list_head node;
200 struct device *dev;
201 struct ata_port_operations *port_ops;
202 Scsi_Host_Template *sht;
203 struct ata_ioports port[ATA_MAX_PORTS];
204 unsigned int n_ports;
205 unsigned int hard_port_no;
206 unsigned int pio_mask;
207 unsigned int mwdma_mask;
208 unsigned int udma_mask;
209 unsigned int legacy_mode;
210 unsigned long irq;
211 unsigned int irq_flags;
212 unsigned long host_flags;
213 void __iomem *mmio_base;
214 void *private_data;
215};
216
217struct ata_host_set {
218 spinlock_t lock;
219 struct device *dev;
220 unsigned long irq;
221 void __iomem *mmio_base;
222 unsigned int n_ports;
223 void *private_data;
224 struct ata_port_operations *ops;
225 struct ata_port * ports[0];
226};
227
228struct ata_queued_cmd {
229 struct ata_port *ap;
230 struct ata_device *dev;
231
232 struct scsi_cmnd *scsicmd;
233 void (*scsidone)(struct scsi_cmnd *);
234
235 struct ata_taskfile tf;
236 u8 cdb[ATAPI_CDB_LEN];
237
238 unsigned long flags; /* ATA_QCFLAG_xxx */
239 unsigned int tag;
240 unsigned int n_elem;
241
242 int dma_dir;
243
244 unsigned int nsect;
245 unsigned int cursect;
246
247 unsigned int nbytes;
248 unsigned int curbytes;
249
250 unsigned int cursg;
251 unsigned int cursg_ofs;
252
253 struct scatterlist sgent;
254 void *buf_virt;
255
256 struct scatterlist *sg;
257
258 ata_qc_cb_t complete_fn;
259
260 struct completion *waiting;
261
262 void *private_data;
263};
264
265struct ata_host_stats {
266 unsigned long unhandled_irq;
267 unsigned long idle_irq;
268 unsigned long rw_reqbuf;
269};
270
271struct ata_device {
272 u64 n_sectors; /* size of device, if ATA */
273 unsigned long flags; /* ATA_DFLAG_xxx */
274 unsigned int class; /* ATA_DEV_xxx */
275 unsigned int devno; /* 0 or 1 */
276 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
277 u8 pio_mode;
278 u8 dma_mode;
279 u8 xfer_mode;
280 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
281
282 /* cache info about current transfer mode */
283 u8 xfer_protocol; /* taskfile xfer protocol */
284 u8 read_cmd; /* opcode to use on read */
285 u8 write_cmd; /* opcode to use on write */
286};
287
288struct ata_port {
289 struct Scsi_Host *host; /* our co-allocated scsi host */
290 struct ata_port_operations *ops;
291 unsigned long flags; /* ATA_FLAG_xxx */
292 unsigned int id; /* unique id req'd by scsi midlyr */
293 unsigned int port_no; /* unique port #; from zero */
294 unsigned int hard_port_no; /* hardware port #; from zero */
295
296 struct ata_prd *prd; /* our SG list */
297 dma_addr_t prd_dma; /* and its DMA mapping */
298
299 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
300
301 u8 ctl; /* cache of ATA control register */
302 u8 last_ctl; /* Cache last written value */
303 unsigned int bus_state;
304 unsigned int port_state;
305 unsigned int pio_mask;
306 unsigned int mwdma_mask;
307 unsigned int udma_mask;
308 unsigned int cbl; /* cable type; ATA_CBL_xxx */
309 unsigned int cdb_len;
310
311 struct ata_device device[ATA_MAX_DEVICES];
312
313 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
314 unsigned long qactive;
315 unsigned int active_tag;
316
317 struct ata_host_stats stats;
318 struct ata_host_set *host_set;
319
320 struct work_struct packet_task;
321
322 struct work_struct pio_task;
323 unsigned int pio_task_state;
324 unsigned long pio_task_timeout;
325
326 void *private_data;
327};
328
329struct ata_port_operations {
330 void (*port_disable) (struct ata_port *);
331
332 void (*dev_config) (struct ata_port *, struct ata_device *);
333
334 void (*set_piomode) (struct ata_port *, struct ata_device *);
335 void (*set_dmamode) (struct ata_port *, struct ata_device *);
336
337 void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf);
338 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
339
340 void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf);
341 u8 (*check_status)(struct ata_port *ap);
342 u8 (*check_altstatus)(struct ata_port *ap);
343 u8 (*check_err)(struct ata_port *ap);
344 void (*dev_select)(struct ata_port *ap, unsigned int device);
345
346 void (*phy_reset) (struct ata_port *ap);
347 void (*post_set_mode) (struct ata_port *ap);
348
349 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
350
351 void (*bmdma_setup) (struct ata_queued_cmd *qc);
352 void (*bmdma_start) (struct ata_queued_cmd *qc);
353
354 void (*qc_prep) (struct ata_queued_cmd *qc);
355 int (*qc_issue) (struct ata_queued_cmd *qc);
356
357 void (*eng_timeout) (struct ata_port *ap);
358
359 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
360 void (*irq_clear) (struct ata_port *);
361
362 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
363 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
364 u32 val);
365
366 int (*port_start) (struct ata_port *ap);
367 void (*port_stop) (struct ata_port *ap);
368
369 void (*host_stop) (struct ata_host_set *host_set);
370
b73fc89f 371 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 372 u8 (*bmdma_status) (struct ata_port *ap);
373};
374
375struct ata_port_info {
376 Scsi_Host_Template *sht;
377 unsigned long host_flags;
378 unsigned long pio_mask;
379 unsigned long mwdma_mask;
380 unsigned long udma_mask;
381 struct ata_port_operations *port_ops;
382};
383
384
385extern void ata_port_probe(struct ata_port *);
386extern void __sata_phy_reset(struct ata_port *ap);
387extern void sata_phy_reset(struct ata_port *ap);
388extern void ata_bus_reset(struct ata_port *ap);
389extern void ata_port_disable(struct ata_port *);
390extern void ata_std_ports(struct ata_ioports *ioaddr);
391#ifdef CONFIG_PCI
392extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
393 unsigned int n_ports);
394extern void ata_pci_remove_one (struct pci_dev *pdev);
395#endif /* CONFIG_PCI */
396extern int ata_device_add(struct ata_probe_ent *ent);
397extern int ata_scsi_detect(Scsi_Host_Template *sht);
398extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
399extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
400extern int ata_scsi_error(struct Scsi_Host *host);
401extern int ata_scsi_release(struct Scsi_Host *host);
402extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
403/*
404 * Default driver ops implementations
405 */
406extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf);
407extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
408extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp);
409extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf);
410extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
411extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
412extern u8 ata_check_status(struct ata_port *ap);
413extern u8 ata_altstatus(struct ata_port *ap);
414extern u8 ata_chk_err(struct ata_port *ap);
415extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf);
416extern int ata_port_start (struct ata_port *ap);
417extern void ata_port_stop (struct ata_port *ap);
aa8f0dc6 418extern void ata_host_stop (struct ata_host_set *host_set);
1da177e4
LT		 419extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
420extern void ata_qc_prep(struct ata_queued_cmd *qc);
421extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
422extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
423 unsigned int buflen);
424extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
425 unsigned int n_elem);
426extern unsigned int ata_dev_classify(struct ata_taskfile *tf);
427extern void ata_dev_id_string(u16 *id, unsigned char *s,
428 unsigned int ofs, unsigned int len);
6f2f3812 429extern void ata_dev_config(struct ata_port *ap, unsigned int i);
1da177e4
LT		 430extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
431extern void ata_bmdma_start (struct ata_queued_cmd *qc);
b73fc89f 432extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 433extern u8 ata_bmdma_status(struct ata_port *ap);
434extern void ata_bmdma_irq_clear(struct ata_port *ap);
435extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat);
436extern void ata_eng_timeout(struct ata_port *ap);
437extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd,
438 void (*done)(struct scsi_cmnd *));
439extern int ata_std_bios_param(struct scsi_device *sdev,
440 struct block_device *bdev,
441 sector_t capacity, int geom[]);
442extern int ata_scsi_slave_config(struct scsi_device *sdev);
443
444
445#ifdef CONFIG_PCI
446struct pci_bits {
447 unsigned int reg; /* PCI config register to read */
448 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
449 unsigned long mask;
450 unsigned long val;
451};
452
453extern struct ata_probe_ent *
454ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port);
455extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits);
456
457#endif /* CONFIG_PCI */
458
459
460static inline unsigned int ata_tag_valid(unsigned int tag)
461{
462 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
463}
464
465static inline unsigned int ata_dev_present(struct ata_device *dev)
466{
467 return ((dev->class == ATA_DEV_ATA) ||
468 (dev->class == ATA_DEV_ATAPI));
469}
470
471static inline u8 ata_chk_status(struct ata_port *ap)
472{
473 return ap->ops->check_status(ap);
474}
475
0baab86b
EF		 476
477/**
478 * ata_pause - Flush writes and pause 400 nanoseconds.
479 * @ap: Port to wait for.
480 *
481 * LOCKING:
482 * Inherited from caller.
483 */
484
1da177e4
LT		 485static inline void ata_pause(struct ata_port *ap)
486{
487 ata_altstatus(ap);
488 ndelay(400);
489}
490
0baab86b
EF		 491
492/**
493 * ata_busy_wait - Wait for a port status register
494 * @ap: Port to wait for.
495 *
496 * Waits up to max*10 microseconds for the selected bits in the port's
497 * status register to be cleared.
498 * Returns final value of status register.
499 *
500 * LOCKING:
501 * Inherited from caller.
502 */
503
1da177e4
LT		 504static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
505 unsigned int max)
506{
507 u8 status;
508
509 do {
510 udelay(10);
511 status = ata_chk_status(ap);
512 max--;
513 } while ((status & bits) && (max > 0));
514
515 return status;
516}
517
0baab86b
EF		 518
519/**
520 * ata_wait_idle - Wait for a port to be idle.
521 * @ap: Port to wait for.
522 *
523 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
524 * Returns final value of status register.
525 *
526 * LOCKING:
527 * Inherited from caller.
528 */
529
1da177e4
LT		 530static inline u8 ata_wait_idle(struct ata_port *ap)
531{
532 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
533
534 if (status & (ATA_BUSY | ATA_DRQ)) {
535 unsigned long l = ap->ioaddr.status_addr;
536 printk(KERN_WARNING
537 "ATA: abnormal status 0x%X on port 0x%lX\n",
538 status, l);
539 }
540
541 return status;
542}
543
544static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
545{
546 qc->tf.ctl |= ATA_NIEN;
547}
548
549static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
550 unsigned int tag)
551{
552 if (likely(ata_tag_valid(tag)))
553 return &ap->qcmd[tag];
554 return NULL;
555}
556
557static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
558{
559 memset(tf, 0, sizeof(*tf));
560
561 tf->ctl = ap->ctl;
562 if (device == 0)
563 tf->device = ATA_DEVICE_OBS;
564 else
565 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
566}
567
0baab86b
EF		 568
569/**
570 * ata_irq_on - Enable interrupts on a port.
571 * @ap: Port on which interrupts are enabled.
572 *
573 * Enable interrupts on a legacy IDE device using MMIO or PIO,
574 * wait for idle, clear any pending interrupts.
575 *
576 * LOCKING:
577 * Inherited from caller.
578 */
579
1da177e4
LT		 580static inline u8 ata_irq_on(struct ata_port *ap)
581{
582 struct ata_ioports *ioaddr = &ap->ioaddr;
583 u8 tmp;
584
585 ap->ctl &= ~ATA_NIEN;
586 ap->last_ctl = ap->ctl;
587
588 if (ap->flags & ATA_FLAG_MMIO)
589 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
590 else
591 outb(ap->ctl, ioaddr->ctl_addr);
592 tmp = ata_wait_idle(ap);
593
594 ap->ops->irq_clear(ap);
595
596 return tmp;
597}
598
0baab86b
EF		 599
600/**
601 * ata_irq_ack - Acknowledge a device interrupt.
602 * @ap: Port on which interrupts are enabled.
603 *
604 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
605 * or BUSY+DRQ clear). Obtain dma status and port status from
606 * device. Clear the interrupt. Return port status.
607 *
608 * LOCKING:
609 */
610
1da177e4
LT		 611static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
612{
613 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
614 u8 host_stat, post_stat, status;
615
616 status = ata_busy_wait(ap, bits, 1000);
617 if (status & bits)
618 DPRINTK("abnormal status 0x%X\n", status);
619
620 /* get controller status; clear intr, err bits */
621 if (ap->flags & ATA_FLAG_MMIO) {
622 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
623 host_stat = readb(mmio + ATA_DMA_STATUS);
624 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
625 mmio + ATA_DMA_STATUS);
626
627 post_stat = readb(mmio + ATA_DMA_STATUS);
628 } else {
629 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
630 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
631 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
632
633 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
634 }
635
636 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
637 host_stat, post_stat, status);
638
639 return status;
640}
641
642static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
643{
644 return ap->ops->scr_read(ap, reg);
645}
646
647static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
648{
649 ap->ops->scr_write(ap, reg, val);
650}
651
8a60a071 652static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
cdcca89e
BR		 653 u32 val)
654{
655 ap->ops->scr_write(ap, reg, val);
656 (void) ap->ops->scr_read(ap, reg);
657}
658
1da177e4
LT		 659static inline unsigned int sata_dev_present(struct ata_port *ap)
660{
661 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
662}
663
664static inline int ata_try_flush_cache(struct ata_device *dev)
665{
666 return ata_id_wcache_enabled(dev->id) ||
667 ata_id_has_flush(dev->id) ||
668 ata_id_has_flush_ext(dev->id);
669}
670
671#endif /* __LINUX_LIBATA_H__ */
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