2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
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)
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.
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.
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
34 #include <linux/ata.h>
35 #include <linux/workqueue.h>
38 * compile-time options
40 #undef ATA_DEBUG /* debugging output */
41 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
42 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
43 #undef ATA_NDEBUG /* define to disable quick runtime checks */
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 */
49 /* note: prints function name for you */
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)
55 #define VPRINTK(fmt, args...)
56 #endif /* ATA_VERBOSE_DEBUG */
58 #define DPRINTK(fmt, args...)
59 #define VPRINTK(fmt, args...)
60 #endif /* ATA_DEBUG */
62 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
67 #define assert(expr) \
68 if(unlikely(!(expr))) { \
69 printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
70 #expr,__FILE__,__FUNCTION__,__LINE__); \
74 /* defines only for the constants which don't work well as enums */
75 #define ATA_TAG_POISON 0xfafbfcfdU
77 /* move to PCI layer? */
78 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
84 /* various global constants */
85 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
89 ATA_MAX_SECTORS = 200, /* FIXME */
91 ATA_DEF_BUSY_WAIT = 10000,
92 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
95 ATA_SHT_CMD_PER_LUN = 1,
97 ATA_SHT_USE_CLUSTERING = 1,
99 /* struct ata_device stuff */
100 ATA_DFLAG_LBA48 = (1 << 0), /* device supports LBA48 */
101 ATA_DFLAG_PIO = (1 << 1), /* device currently in PIO mode */
102 ATA_DFLAG_LOCK_SECTORS = (1 << 2), /* don't adjust max_sectors */
103 ATA_DFLAG_LBA = (1 << 3), /* device supports LBA */
104 ATA_DFLAG_CDB_INTR = (1 << 4), /* device asserts INTRQ when ready for CDB */
106 ATA_DEV_UNKNOWN = 0, /* unknown device */
107 ATA_DEV_ATA = 1, /* ATA device */
108 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
109 ATA_DEV_ATAPI = 3, /* ATAPI device */
110 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
111 ATA_DEV_NONE = 5, /* no device */
113 /* struct ata_port flags */
114 ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */
115 /* (doesn't imply presence) */
116 ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */
117 ATA_FLAG_SATA = (1 << 3),
118 ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */
119 ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */
120 ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */
121 ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */
122 ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */
123 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
124 * doesn't handle PIO interrupts */
125 ATA_FLAG_DEBUGMSG = (1 << 10),
126 ATA_FLAG_NO_ATAPI = (1 << 11), /* No ATAPI support */
128 ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */
129 ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */
130 ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */
131 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
133 /* various lengths of time */
134 ATA_TMOUT_EDD = 5 * HZ, /* hueristic */
135 ATA_TMOUT_PIO = 30 * HZ,
136 ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */
137 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */
138 ATA_TMOUT_DATAOUT = 30 * HZ,
139 ATA_TMOUT_DATAOUT_QUICK = 5 * HZ,
140 ATA_TMOUT_CDB = 30 * HZ,
141 ATA_TMOUT_CDB_QUICK = 5 * HZ,
142 ATA_TMOUT_INTERNAL = 30 * HZ,
143 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
157 /* SATA port states */
162 /* encoding various smaller bitmaps into a single
163 * unsigned long bitmap
169 /* size of buffer to pad xfers ending on unaligned boundaries */
171 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
173 /* Masks for port functions */
174 ATA_PORT_PRIMARY = (1 << 0),
175 ATA_PORT_SECONDARY = (1 << 1),
178 enum hsm_task_states {
179 HSM_ST_UNKNOWN, /* state unknown */
180 HSM_ST_IDLE, /* no command on going */
181 HSM_ST_POLL, /* same as HSM_ST, waits longer */
182 HSM_ST_TMOUT, /* timeout */
183 HSM_ST, /* (waiting the device to) transfer data */
184 HSM_ST_LAST, /* (waiting the device to) complete command */
185 HSM_ST_LAST_POLL, /* same as HSM_ST_LAST, waits longer */
186 HSM_ST_ERR, /* error */
187 HSM_ST_FIRST, /* (waiting the device to)
188 write CDB or first data block */
191 enum ata_completion_errors {
192 AC_ERR_OTHER = (1 << 0),
193 AC_ERR_DEV = (1 << 1),
194 AC_ERR_ATA_BUS = (1 << 2),
195 AC_ERR_HOST_BUS = (1 << 3),
198 /* forward declarations */
200 struct ata_port_operations;
202 struct ata_queued_cmd;
205 typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
208 unsigned long cmd_addr;
209 unsigned long data_addr;
210 unsigned long error_addr;
211 unsigned long feature_addr;
212 unsigned long nsect_addr;
213 unsigned long lbal_addr;
214 unsigned long lbam_addr;
215 unsigned long lbah_addr;
216 unsigned long device_addr;
217 unsigned long status_addr;
218 unsigned long command_addr;
219 unsigned long altstatus_addr;
220 unsigned long ctl_addr;
221 unsigned long bmdma_addr;
222 unsigned long scr_addr;
225 struct ata_probe_ent {
226 struct list_head node;
228 const struct ata_port_operations *port_ops;
229 struct scsi_host_template *sht;
230 struct ata_ioports port[ATA_MAX_PORTS];
231 unsigned int n_ports;
232 unsigned int hard_port_no;
233 unsigned int pio_mask;
234 unsigned int mwdma_mask;
235 unsigned int udma_mask;
236 unsigned int legacy_mode;
238 unsigned int irq_flags;
239 unsigned long host_flags;
240 void __iomem *mmio_base;
244 struct ata_host_set {
248 void __iomem *mmio_base;
249 unsigned int n_ports;
251 const struct ata_port_operations *ops;
252 struct ata_port * ports[0];
255 struct ata_queued_cmd {
257 struct ata_device *dev;
259 struct scsi_cmnd *scsicmd;
260 void (*scsidone)(struct scsi_cmnd *);
262 struct ata_taskfile tf;
263 u8 cdb[ATAPI_CDB_LEN];
265 unsigned long flags; /* ATA_QCFLAG_xxx */
268 unsigned int orig_n_elem;
272 unsigned int pad_len;
275 unsigned int cursect;
278 unsigned int curbytes;
281 unsigned int cursg_ofs;
283 struct scatterlist sgent;
284 struct scatterlist pad_sgent;
287 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
288 struct scatterlist *__sg;
290 unsigned int err_mask;
292 ata_qc_cb_t complete_fn;
297 struct ata_host_stats {
298 unsigned long unhandled_irq;
299 unsigned long idle_irq;
300 unsigned long rw_reqbuf;
304 u64 n_sectors; /* size of device, if ATA */
305 unsigned long flags; /* ATA_DFLAG_xxx */
306 unsigned int class; /* ATA_DEV_xxx */
307 unsigned int devno; /* 0 or 1 */
308 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
312 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
314 unsigned int multi_count; /* sectors count for
315 READ/WRITE MULTIPLE */
317 /* for CHS addressing */
318 u16 cylinders; /* Number of cylinders */
319 u16 heads; /* Number of heads */
320 u16 sectors; /* Number of sectors per track */
324 struct Scsi_Host *host; /* our co-allocated scsi host */
325 const struct ata_port_operations *ops;
326 unsigned long flags; /* ATA_FLAG_xxx */
327 unsigned int id; /* unique id req'd by scsi midlyr */
328 unsigned int port_no; /* unique port #; from zero */
329 unsigned int hard_port_no; /* hardware port #; from zero */
331 struct ata_prd *prd; /* our SG list */
332 dma_addr_t prd_dma; /* and its DMA mapping */
334 void *pad; /* array of DMA pad buffers */
337 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
339 u8 ctl; /* cache of ATA control register */
340 u8 last_ctl; /* Cache last written value */
341 unsigned int pio_mask;
342 unsigned int mwdma_mask;
343 unsigned int udma_mask;
344 unsigned int cbl; /* cable type; ATA_CBL_xxx */
345 unsigned int cdb_len;
347 struct ata_device device[ATA_MAX_DEVICES];
349 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
350 unsigned long qactive;
351 unsigned int active_tag;
353 struct ata_host_stats stats;
354 struct ata_host_set *host_set;
356 struct work_struct pio_task;
357 unsigned int hsm_task_state;
358 unsigned long pio_task_timeout;
363 struct ata_port_operations {
364 void (*port_disable) (struct ata_port *);
366 void (*dev_config) (struct ata_port *, struct ata_device *);
368 void (*set_piomode) (struct ata_port *, struct ata_device *);
369 void (*set_dmamode) (struct ata_port *, struct ata_device *);
371 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
372 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
374 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
375 u8 (*check_status)(struct ata_port *ap);
376 u8 (*check_altstatus)(struct ata_port *ap);
377 void (*dev_select)(struct ata_port *ap, unsigned int device);
379 void (*phy_reset) (struct ata_port *ap);
380 void (*post_set_mode) (struct ata_port *ap);
382 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
384 void (*bmdma_setup) (struct ata_queued_cmd *qc);
385 void (*bmdma_start) (struct ata_queued_cmd *qc);
387 void (*qc_prep) (struct ata_queued_cmd *qc);
388 int (*qc_issue) (struct ata_queued_cmd *qc);
390 void (*eng_timeout) (struct ata_port *ap);
392 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
393 void (*irq_clear) (struct ata_port *);
395 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
396 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
399 int (*port_start) (struct ata_port *ap);
400 void (*port_stop) (struct ata_port *ap);
402 void (*host_stop) (struct ata_host_set *host_set);
404 void (*bmdma_stop) (struct ata_queued_cmd *qc);
405 u8 (*bmdma_status) (struct ata_port *ap);
408 struct ata_port_info {
409 struct scsi_host_template *sht;
410 unsigned long host_flags;
411 unsigned long pio_mask;
412 unsigned long mwdma_mask;
413 unsigned long udma_mask;
414 const struct ata_port_operations *port_ops;
419 unsigned short mode; /* ATA mode */
420 unsigned short setup; /* t1 */
421 unsigned short act8b; /* t2 for 8-bit I/O */
422 unsigned short rec8b; /* t2i for 8-bit I/O */
423 unsigned short cyc8b; /* t0 for 8-bit I/O */
424 unsigned short active; /* t2 or tD */
425 unsigned short recover; /* t2i or tK */
426 unsigned short cycle; /* t0 */
427 unsigned short udma; /* t2CYCTYP/2 */
430 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
432 extern void ata_port_probe(struct ata_port *);
433 extern void __sata_phy_reset(struct ata_port *ap);
434 extern void sata_phy_reset(struct ata_port *ap);
435 extern void ata_bus_reset(struct ata_port *ap);
436 extern void ata_port_disable(struct ata_port *);
437 extern void ata_std_ports(struct ata_ioports *ioaddr);
439 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
440 unsigned int n_ports);
441 extern void ata_pci_remove_one (struct pci_dev *pdev);
442 #endif /* CONFIG_PCI */
443 extern int ata_device_add(const struct ata_probe_ent *ent);
444 extern void ata_host_set_remove(struct ata_host_set *host_set);
445 extern int ata_scsi_detect(struct scsi_host_template *sht);
446 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
447 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
448 extern int ata_scsi_error(struct Scsi_Host *host);
449 extern int ata_scsi_release(struct Scsi_Host *host);
450 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
451 extern int ata_ratelimit(void);
454 * Default driver ops implementations
456 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
457 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
458 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
459 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
460 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
461 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
462 extern u8 ata_check_status(struct ata_port *ap);
463 extern u8 ata_altstatus(struct ata_port *ap);
464 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
465 extern int ata_port_start (struct ata_port *ap);
466 extern void ata_port_stop (struct ata_port *ap);
467 extern void ata_host_stop (struct ata_host_set *host_set);
468 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
469 extern void ata_qc_prep(struct ata_queued_cmd *qc);
470 extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
471 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
472 unsigned int buflen);
473 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
474 unsigned int n_elem);
475 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
476 extern void ata_dev_id_string(const u16 *id, unsigned char *s,
477 unsigned int ofs, unsigned int len);
478 extern void ata_dev_config(struct ata_port *ap, unsigned int i);
479 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
480 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
481 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
482 extern u8 ata_bmdma_status(struct ata_port *ap);
483 extern void ata_bmdma_irq_clear(struct ata_port *ap);
484 extern void ata_qc_complete(struct ata_queued_cmd *qc);
485 extern void ata_eng_timeout(struct ata_port *ap);
486 extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd,
487 void (*done)(struct scsi_cmnd *));
488 extern int ata_std_bios_param(struct scsi_device *sdev,
489 struct block_device *bdev,
490 sector_t capacity, int geom[]);
491 extern int ata_scsi_slave_config(struct scsi_device *sdev);
496 extern int ata_timing_compute(struct ata_device *, unsigned short,
497 struct ata_timing *, int, int);
498 extern void ata_timing_merge(const struct ata_timing *,
499 const struct ata_timing *, struct ata_timing *,
503 ATA_TIMING_SETUP = (1 << 0),
504 ATA_TIMING_ACT8B = (1 << 1),
505 ATA_TIMING_REC8B = (1 << 2),
506 ATA_TIMING_CYC8B = (1 << 3),
507 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
509 ATA_TIMING_ACTIVE = (1 << 4),
510 ATA_TIMING_RECOVER = (1 << 5),
511 ATA_TIMING_CYCLE = (1 << 6),
512 ATA_TIMING_UDMA = (1 << 7),
513 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
514 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
515 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
516 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
522 unsigned int reg; /* PCI config register to read */
523 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
528 extern void ata_pci_host_stop (struct ata_host_set *host_set);
529 extern struct ata_probe_ent *
530 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
531 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
533 #endif /* CONFIG_PCI */
537 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
539 if (sg == &qc->pad_sgent)
543 if (((sg - qc->__sg) + 1) == qc->n_elem)
548 static inline struct scatterlist *
549 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
551 if (sg == &qc->pad_sgent)
553 if (++sg - qc->__sg < qc->n_elem)
555 return qc->pad_len ? &qc->pad_sgent : NULL;
558 #define ata_for_each_sg(sg, qc) \
559 for (sg = qc->__sg; sg; sg = ata_qc_next_sg(sg, qc))
561 static inline unsigned int ata_tag_valid(unsigned int tag)
563 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
566 static inline unsigned int ata_dev_present(const struct ata_device *dev)
568 return ((dev->class == ATA_DEV_ATA) ||
569 (dev->class == ATA_DEV_ATAPI));
572 static inline u8 ata_chk_status(struct ata_port *ap)
574 return ap->ops->check_status(ap);
579 * ata_pause - Flush writes and pause 400 nanoseconds.
580 * @ap: Port to wait for.
583 * Inherited from caller.
586 static inline void ata_pause(struct ata_port *ap)
594 * ata_busy_wait - Wait for a port status register
595 * @ap: Port to wait for.
597 * Waits up to max*10 microseconds for the selected bits in the port's
598 * status register to be cleared.
599 * Returns final value of status register.
602 * Inherited from caller.
605 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
612 status = ata_chk_status(ap);
614 } while ((status & bits) && (max > 0));
621 * ata_wait_idle - Wait for a port to be idle.
622 * @ap: Port to wait for.
624 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
625 * Returns final value of status register.
628 * Inherited from caller.
631 static inline u8 ata_wait_idle(struct ata_port *ap)
633 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
635 if (status & (ATA_BUSY | ATA_DRQ)) {
636 unsigned long l = ap->ioaddr.status_addr;
638 "ATA: abnormal status 0x%X on port 0x%lX\n",
645 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
647 qc->tf.ctl |= ATA_NIEN;
650 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
653 if (likely(ata_tag_valid(tag)))
654 return &ap->qcmd[tag];
658 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
660 memset(tf, 0, sizeof(*tf));
664 tf->device = ATA_DEVICE_OBS;
666 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
669 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
673 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
675 qc->nbytes = qc->curbytes = 0;
678 ata_tf_init(qc->ap, &qc->tf, qc->dev->devno);
683 * ata_irq_on - Enable interrupts on a port.
684 * @ap: Port on which interrupts are enabled.
686 * Enable interrupts on a legacy IDE device using MMIO or PIO,
687 * wait for idle, clear any pending interrupts.
690 * Inherited from caller.
693 static inline u8 ata_irq_on(struct ata_port *ap)
695 struct ata_ioports *ioaddr = &ap->ioaddr;
698 ap->ctl &= ~ATA_NIEN;
699 ap->last_ctl = ap->ctl;
701 if (ap->flags & ATA_FLAG_MMIO)
702 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
704 outb(ap->ctl, ioaddr->ctl_addr);
705 tmp = ata_wait_idle(ap);
707 ap->ops->irq_clear(ap);
714 * ata_irq_ack - Acknowledge a device interrupt.
715 * @ap: Port on which interrupts are enabled.
717 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
718 * or BUSY+DRQ clear). Obtain dma status and port status from
719 * device. Clear the interrupt. Return port status.
724 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
726 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
727 u8 host_stat, post_stat, status;
729 status = ata_busy_wait(ap, bits, 1000);
731 DPRINTK("abnormal status 0x%X\n", status);
733 /* get controller status; clear intr, err bits */
734 if (ap->flags & ATA_FLAG_MMIO) {
735 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
736 host_stat = readb(mmio + ATA_DMA_STATUS);
737 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
738 mmio + ATA_DMA_STATUS);
740 post_stat = readb(mmio + ATA_DMA_STATUS);
742 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
743 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
744 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
746 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
749 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
750 host_stat, post_stat, status);
755 static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
757 return ap->ops->scr_read(ap, reg);
760 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
762 ap->ops->scr_write(ap, reg, val);
765 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
768 ap->ops->scr_write(ap, reg, val);
769 (void) ap->ops->scr_read(ap, reg);
772 static inline unsigned int sata_dev_present(struct ata_port *ap)
774 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
777 static inline int ata_try_flush_cache(const struct ata_device *dev)
779 return ata_id_wcache_enabled(dev->id) ||
780 ata_id_has_flush(dev->id) ||
781 ata_id_has_flush_ext(dev->id);
784 static inline unsigned int ac_err_mask(u8 status)
786 if (status & ATA_BUSY)
787 return AC_ERR_ATA_BUS;
788 if (status & (ATA_ERR | ATA_DF))
793 static inline unsigned int __ac_err_mask(u8 status)
795 unsigned int mask = ac_err_mask(status);
801 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
804 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
805 &ap->pad_dma, GFP_KERNEL);
806 return (ap->pad == NULL) ? -ENOMEM : 0;
809 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
811 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
814 #endif /* __LINUX_LIBATA_H__ */