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[libata] license change, other bits
[linux-2.6-block.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 */
119
120 ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */
121 ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */
122 ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */
123 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
124
125 /* various lengths of time */
126 ATA_TMOUT_EDD = 5 * HZ, /* hueristic */
127 ATA_TMOUT_PIO = 30 * HZ,
128 ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */
129 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */
130 ATA_TMOUT_CDB = 30 * HZ,
131 ATA_TMOUT_CDB_QUICK = 5 * HZ,
132
133 /* ATA bus states */
134 BUS_UNKNOWN = 0,
135 BUS_DMA = 1,
136 BUS_IDLE = 2,
137 BUS_NOINTR = 3,
138 BUS_NODATA = 4,
139 BUS_TIMER = 5,
140 BUS_PIO = 6,
141 BUS_EDD = 7,
142 BUS_IDENTIFY = 8,
143 BUS_PACKET = 9,
144
145 /* SATA port states */
146 PORT_UNKNOWN = 0,
147 PORT_ENABLED = 1,
148 PORT_DISABLED = 2,
149
150 /* encoding various smaller bitmaps into a single
151 * unsigned long bitmap
152 */
153 ATA_SHIFT_UDMA = 0,
154 ATA_SHIFT_MWDMA = 8,
155 ATA_SHIFT_PIO = 11,
156};
157
158enum pio_task_states {
159 PIO_ST_UNKNOWN,
160 PIO_ST_IDLE,
161 PIO_ST_POLL,
162 PIO_ST_TMOUT,
163 PIO_ST,
164 PIO_ST_LAST,
165 PIO_ST_LAST_POLL,
166 PIO_ST_ERR,
167};
168
169/* forward declarations */
170struct scsi_device;
171struct ata_port_operations;
172struct ata_port;
173struct ata_queued_cmd;
174
175/* typedefs */
176typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, u8 drv_stat);
177
178struct ata_ioports {
179 unsigned long cmd_addr;
180 unsigned long data_addr;
181 unsigned long error_addr;
182 unsigned long feature_addr;
183 unsigned long nsect_addr;
184 unsigned long lbal_addr;
185 unsigned long lbam_addr;
186 unsigned long lbah_addr;
187 unsigned long device_addr;
188 unsigned long status_addr;
189 unsigned long command_addr;
190 unsigned long altstatus_addr;
191 unsigned long ctl_addr;
192 unsigned long bmdma_addr;
193 unsigned long scr_addr;
194};
195
196struct ata_probe_ent {
197 struct list_head node;
198 struct device *dev;
199 struct ata_port_operations *port_ops;
200 Scsi_Host_Template *sht;
201 struct ata_ioports port[ATA_MAX_PORTS];
202 unsigned int n_ports;
203 unsigned int hard_port_no;
204 unsigned int pio_mask;
205 unsigned int mwdma_mask;
206 unsigned int udma_mask;
207 unsigned int legacy_mode;
208 unsigned long irq;
209 unsigned int irq_flags;
210 unsigned long host_flags;
211 void __iomem *mmio_base;
212 void *private_data;
213};
214
215struct ata_host_set {
216 spinlock_t lock;
217 struct device *dev;
218 unsigned long irq;
219 void __iomem *mmio_base;
220 unsigned int n_ports;
221 void *private_data;
222 struct ata_port_operations *ops;
223 struct ata_port * ports[0];
224};
225
226struct ata_queued_cmd {
227 struct ata_port *ap;
228 struct ata_device *dev;
229
230 struct scsi_cmnd *scsicmd;
231 void (*scsidone)(struct scsi_cmnd *);
232
233 struct ata_taskfile tf;
234 u8 cdb[ATAPI_CDB_LEN];
235
236 unsigned long flags; /* ATA_QCFLAG_xxx */
237 unsigned int tag;
238 unsigned int n_elem;
239
240 int dma_dir;
241
242 unsigned int nsect;
243 unsigned int cursect;
244
245 unsigned int nbytes;
246 unsigned int curbytes;
247
248 unsigned int cursg;
249 unsigned int cursg_ofs;
250
251 struct scatterlist sgent;
252 void *buf_virt;
253
254 struct scatterlist *sg;
255
256 ata_qc_cb_t complete_fn;
257
258 struct completion *waiting;
259
260 void *private_data;
261};
262
263struct ata_host_stats {
264 unsigned long unhandled_irq;
265 unsigned long idle_irq;
266 unsigned long rw_reqbuf;
267};
268
269struct ata_device {
270 u64 n_sectors; /* size of device, if ATA */
271 unsigned long flags; /* ATA_DFLAG_xxx */
272 unsigned int class; /* ATA_DEV_xxx */
273 unsigned int devno; /* 0 or 1 */
274 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
275 u8 pio_mode;
276 u8 dma_mode;
277 u8 xfer_mode;
278 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
279
280 /* cache info about current transfer mode */
281 u8 xfer_protocol; /* taskfile xfer protocol */
282 u8 read_cmd; /* opcode to use on read */
283 u8 write_cmd; /* opcode to use on write */
284};
285
286struct ata_port {
287 struct Scsi_Host *host; /* our co-allocated scsi host */
288 struct ata_port_operations *ops;
289 unsigned long flags; /* ATA_FLAG_xxx */
290 unsigned int id; /* unique id req'd by scsi midlyr */
291 unsigned int port_no; /* unique port #; from zero */
292 unsigned int hard_port_no; /* hardware port #; from zero */
293
294 struct ata_prd *prd; /* our SG list */
295 dma_addr_t prd_dma; /* and its DMA mapping */
296
297 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
298
299 u8 ctl; /* cache of ATA control register */
300 u8 last_ctl; /* Cache last written value */
301 unsigned int bus_state;
302 unsigned int port_state;
303 unsigned int pio_mask;
304 unsigned int mwdma_mask;
305 unsigned int udma_mask;
306 unsigned int cbl; /* cable type; ATA_CBL_xxx */
307 unsigned int cdb_len;
308
309 struct ata_device device[ATA_MAX_DEVICES];
310
311 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
312 unsigned long qactive;
313 unsigned int active_tag;
314
315 struct ata_host_stats stats;
316 struct ata_host_set *host_set;
317
318 struct work_struct packet_task;
319
320 struct work_struct pio_task;
321 unsigned int pio_task_state;
322 unsigned long pio_task_timeout;
323
324 void *private_data;
325};
326
327struct ata_port_operations {
328 void (*port_disable) (struct ata_port *);
329
330 void (*dev_config) (struct ata_port *, struct ata_device *);
331
332 void (*set_piomode) (struct ata_port *, struct ata_device *);
333 void (*set_dmamode) (struct ata_port *, struct ata_device *);
334
335 void (*tf_load) (struct ata_port *ap, struct ata_taskfile *tf);
336 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
337
338 void (*exec_command)(struct ata_port *ap, struct ata_taskfile *tf);
339 u8 (*check_status)(struct ata_port *ap);
340 u8 (*check_altstatus)(struct ata_port *ap);
341 u8 (*check_err)(struct ata_port *ap);
342 void (*dev_select)(struct ata_port *ap, unsigned int device);
343
344 void (*phy_reset) (struct ata_port *ap);
345 void (*post_set_mode) (struct ata_port *ap);
346
347 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
348
349 void (*bmdma_setup) (struct ata_queued_cmd *qc);
350 void (*bmdma_start) (struct ata_queued_cmd *qc);
351
352 void (*qc_prep) (struct ata_queued_cmd *qc);
353 int (*qc_issue) (struct ata_queued_cmd *qc);
354
355 void (*eng_timeout) (struct ata_port *ap);
356
357 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
358 void (*irq_clear) (struct ata_port *);
359
360 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
361 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
362 u32 val);
363
364 int (*port_start) (struct ata_port *ap);
365 void (*port_stop) (struct ata_port *ap);
366
367 void (*host_stop) (struct ata_host_set *host_set);
368
369 void (*bmdma_stop) (struct ata_port *ap);
370 u8 (*bmdma_status) (struct ata_port *ap);
371};
372
373struct ata_port_info {
374 Scsi_Host_Template *sht;
375 unsigned long host_flags;
376 unsigned long pio_mask;
377 unsigned long mwdma_mask;
378 unsigned long udma_mask;
379 struct ata_port_operations *port_ops;
380};
381
382
383extern void ata_port_probe(struct ata_port *);
384extern void __sata_phy_reset(struct ata_port *ap);
385extern void sata_phy_reset(struct ata_port *ap);
386extern void ata_bus_reset(struct ata_port *ap);
387extern void ata_port_disable(struct ata_port *);
388extern void ata_std_ports(struct ata_ioports *ioaddr);
389#ifdef CONFIG_PCI
390extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
391 unsigned int n_ports);
392extern void ata_pci_remove_one (struct pci_dev *pdev);
393#endif /* CONFIG_PCI */
394extern int ata_device_add(struct ata_probe_ent *ent);
395extern int ata_scsi_detect(Scsi_Host_Template *sht);
396extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
397extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
398extern int ata_scsi_error(struct Scsi_Host *host);
399extern int ata_scsi_release(struct Scsi_Host *host);
400extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
401/*
402 * Default driver ops implementations
403 */
404extern void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf);
405extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
406extern void ata_tf_to_fis(struct ata_taskfile *tf, u8 *fis, u8 pmp);
407extern void ata_tf_from_fis(u8 *fis, struct ata_taskfile *tf);
408extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
409extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
410extern u8 ata_check_status(struct ata_port *ap);
411extern u8 ata_altstatus(struct ata_port *ap);
412extern u8 ata_chk_err(struct ata_port *ap);
413extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf);
414extern int ata_port_start (struct ata_port *ap);
415extern void ata_port_stop (struct ata_port *ap);
aa8f0dc6 416extern void ata_host_stop (struct ata_host_set *host_set);
1da177e4
LT		 417extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
418extern void ata_qc_prep(struct ata_queued_cmd *qc);
419extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
420extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
421 unsigned int buflen);
422extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
423 unsigned int n_elem);
424extern unsigned int ata_dev_classify(struct ata_taskfile *tf);
425extern void ata_dev_id_string(u16 *id, unsigned char *s,
426 unsigned int ofs, unsigned int len);
6f2f3812 427extern void ata_dev_config(struct ata_port *ap, unsigned int i);
1da177e4
LT		 428extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
429extern void ata_bmdma_start (struct ata_queued_cmd *qc);
430extern void ata_bmdma_stop(struct ata_port *ap);
431extern u8 ata_bmdma_status(struct ata_port *ap);
432extern void ata_bmdma_irq_clear(struct ata_port *ap);
433extern void ata_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat);
434extern void ata_eng_timeout(struct ata_port *ap);
435extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd,
436 void (*done)(struct scsi_cmnd *));
437extern int ata_std_bios_param(struct scsi_device *sdev,
438 struct block_device *bdev,
439 sector_t capacity, int geom[]);
440extern int ata_scsi_slave_config(struct scsi_device *sdev);
441
442
443#ifdef CONFIG_PCI
444struct pci_bits {
445 unsigned int reg; /* PCI config register to read */
446 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
447 unsigned long mask;
448 unsigned long val;
449};
450
451extern struct ata_probe_ent *
452ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port);
453extern int pci_test_config_bits(struct pci_dev *pdev, struct pci_bits *bits);
454
455#endif /* CONFIG_PCI */
456
457
458static inline unsigned int ata_tag_valid(unsigned int tag)
459{
460 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
461}
462
463static inline unsigned int ata_dev_present(struct ata_device *dev)
464{
465 return ((dev->class == ATA_DEV_ATA) ||
466 (dev->class == ATA_DEV_ATAPI));
467}
468
469static inline u8 ata_chk_status(struct ata_port *ap)
470{
471 return ap->ops->check_status(ap);
472}
473
0baab86b
EF		 474
475/**
476 * ata_pause - Flush writes and pause 400 nanoseconds.
477 * @ap: Port to wait for.
478 *
479 * LOCKING:
480 * Inherited from caller.
481 */
482
1da177e4
LT		 483static inline void ata_pause(struct ata_port *ap)
484{
485 ata_altstatus(ap);
486 ndelay(400);
487}
488
0baab86b
EF		 489
490/**
491 * ata_busy_wait - Wait for a port status register
492 * @ap: Port to wait for.
493 *
494 * Waits up to max*10 microseconds for the selected bits in the port's
495 * status register to be cleared.
496 * Returns final value of status register.
497 *
498 * LOCKING:
499 * Inherited from caller.
500 */
501
1da177e4
LT		 502static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
503 unsigned int max)
504{
505 u8 status;
506
507 do {
508 udelay(10);
509 status = ata_chk_status(ap);
510 max--;
511 } while ((status & bits) && (max > 0));
512
513 return status;
514}
515
0baab86b
EF		 516
517/**
518 * ata_wait_idle - Wait for a port to be idle.
519 * @ap: Port to wait for.
520 *
521 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
522 * Returns final value of status register.
523 *
524 * LOCKING:
525 * Inherited from caller.
526 */
527
1da177e4
LT		 528static inline u8 ata_wait_idle(struct ata_port *ap)
529{
530 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
531
532 if (status & (ATA_BUSY | ATA_DRQ)) {
533 unsigned long l = ap->ioaddr.status_addr;
534 printk(KERN_WARNING
535 "ATA: abnormal status 0x%X on port 0x%lX\n",
536 status, l);
537 }
538
539 return status;
540}
541
542static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
543{
544 qc->tf.ctl |= ATA_NIEN;
545}
546
547static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
548 unsigned int tag)
549{
550 if (likely(ata_tag_valid(tag)))
551 return &ap->qcmd[tag];
552 return NULL;
553}
554
555static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
556{
557 memset(tf, 0, sizeof(*tf));
558
559 tf->ctl = ap->ctl;
560 if (device == 0)
561 tf->device = ATA_DEVICE_OBS;
562 else
563 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
564}
565
0baab86b
EF		 566
567/**
568 * ata_irq_on - Enable interrupts on a port.
569 * @ap: Port on which interrupts are enabled.
570 *
571 * Enable interrupts on a legacy IDE device using MMIO or PIO,
572 * wait for idle, clear any pending interrupts.
573 *
574 * LOCKING:
575 * Inherited from caller.
576 */
577
1da177e4
LT		 578static inline u8 ata_irq_on(struct ata_port *ap)
579{
580 struct ata_ioports *ioaddr = &ap->ioaddr;
581 u8 tmp;
582
583 ap->ctl &= ~ATA_NIEN;
584 ap->last_ctl = ap->ctl;
585
586 if (ap->flags & ATA_FLAG_MMIO)
587 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
588 else
589 outb(ap->ctl, ioaddr->ctl_addr);
590 tmp = ata_wait_idle(ap);
591
592 ap->ops->irq_clear(ap);
593
594 return tmp;
595}
596
0baab86b
EF		 597
598/**
599 * ata_irq_ack - Acknowledge a device interrupt.
600 * @ap: Port on which interrupts are enabled.
601 *
602 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
603 * or BUSY+DRQ clear). Obtain dma status and port status from
604 * device. Clear the interrupt. Return port status.
605 *
606 * LOCKING:
607 */
608
1da177e4
LT		 609static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
610{
611 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
612 u8 host_stat, post_stat, status;
613
614 status = ata_busy_wait(ap, bits, 1000);
615 if (status & bits)
616 DPRINTK("abnormal status 0x%X\n", status);
617
618 /* get controller status; clear intr, err bits */
619 if (ap->flags & ATA_FLAG_MMIO) {
620 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
621 host_stat = readb(mmio + ATA_DMA_STATUS);
622 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
623 mmio + ATA_DMA_STATUS);
624
625 post_stat = readb(mmio + ATA_DMA_STATUS);
626 } else {
627 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
628 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
629 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
630
631 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
632 }
633
634 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
635 host_stat, post_stat, status);
636
637 return status;
638}
639
640static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
641{
642 return ap->ops->scr_read(ap, reg);
643}
644
645static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
646{
647 ap->ops->scr_write(ap, reg, val);
648}
649
cdcca89e
BR		 650static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
651 u32 val)
652{
653 ap->ops->scr_write(ap, reg, val);
654 (void) ap->ops->scr_read(ap, reg);
655}
656
1da177e4
LT		 657static inline unsigned int sata_dev_present(struct ata_port *ap)
658{
659 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
660}
661
662static inline int ata_try_flush_cache(struct ata_device *dev)
663{
664 return ata_id_wcache_enabled(dev->id) ||
665 ata_id_has_flush(dev->id) ||
666 ata_id_has_flush_ext(dev->id);
667}
668
669#endif /* __LINUX_LIBATA_H__ */
Linux 6.x block layer and io_uring tree(s)