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 */
105 ATA_DEV_UNKNOWN = 0, /* unknown device */
106 ATA_DEV_ATA = 1, /* ATA device */
107 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
108 ATA_DEV_ATAPI = 3, /* ATAPI device */
109 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
110 ATA_DEV_NONE = 5, /* no device */
112 /* struct ata_port flags */
113 ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */
114 /* (doesn't imply presence) */
115 ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */
116 ATA_FLAG_SATA = (1 << 3),
117 ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */
118 ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */
119 ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */
120 ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */
121 ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */
122 ATA_FLAG_NOINTR = (1 << 9), /* FIXME: Remove this once
123 * proper HSM is in place. */
124 ATA_FLAG_DEBUGMSG = (1 << 10),
126 ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */
127 ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */
128 ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */
129 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
131 /* various lengths of time */
132 ATA_TMOUT_EDD = 5 * HZ, /* hueristic */
133 ATA_TMOUT_PIO = 30 * HZ,
134 ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */
135 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */
136 ATA_TMOUT_CDB = 30 * HZ,
137 ATA_TMOUT_CDB_QUICK = 5 * HZ,
138 ATA_TMOUT_INTERNAL = 30 * HZ,
139 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
153 /* SATA port states */
158 /* encoding various smaller bitmaps into a single
159 * unsigned long bitmap
165 /* size of buffer to pad xfers ending on unaligned boundaries */
167 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
169 /* Masks for port functions */
170 ATA_PORT_PRIMARY = (1 << 0),
171 ATA_PORT_SECONDARY = (1 << 1),
174 enum hsm_task_states {
185 enum ata_completion_errors {
186 AC_ERR_OTHER = (1 << 0),
187 AC_ERR_DEV = (1 << 1),
188 AC_ERR_ATA_BUS = (1 << 2),
189 AC_ERR_HOST_BUS = (1 << 3),
192 /* forward declarations */
194 struct ata_port_operations;
196 struct ata_queued_cmd;
199 typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
202 unsigned long cmd_addr;
203 unsigned long data_addr;
204 unsigned long error_addr;
205 unsigned long feature_addr;
206 unsigned long nsect_addr;
207 unsigned long lbal_addr;
208 unsigned long lbam_addr;
209 unsigned long lbah_addr;
210 unsigned long device_addr;
211 unsigned long status_addr;
212 unsigned long command_addr;
213 unsigned long altstatus_addr;
214 unsigned long ctl_addr;
215 unsigned long bmdma_addr;
216 unsigned long scr_addr;
219 struct ata_probe_ent {
220 struct list_head node;
222 const struct ata_port_operations *port_ops;
223 struct scsi_host_template *sht;
224 struct ata_ioports port[ATA_MAX_PORTS];
225 unsigned int n_ports;
226 unsigned int hard_port_no;
227 unsigned int pio_mask;
228 unsigned int mwdma_mask;
229 unsigned int udma_mask;
230 unsigned int legacy_mode;
232 unsigned int irq_flags;
233 unsigned long host_flags;
234 void __iomem *mmio_base;
238 struct ata_host_set {
242 void __iomem *mmio_base;
243 unsigned int n_ports;
245 const struct ata_port_operations *ops;
246 struct ata_port * ports[0];
249 struct ata_queued_cmd {
251 struct ata_device *dev;
253 struct scsi_cmnd *scsicmd;
254 void (*scsidone)(struct scsi_cmnd *);
256 struct ata_taskfile tf;
257 u8 cdb[ATAPI_CDB_LEN];
259 unsigned long flags; /* ATA_QCFLAG_xxx */
262 unsigned int orig_n_elem;
266 unsigned int pad_len;
269 unsigned int cursect;
272 unsigned int curbytes;
275 unsigned int cursg_ofs;
277 struct scatterlist sgent;
278 struct scatterlist pad_sgent;
281 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
282 struct scatterlist *__sg;
284 unsigned int err_mask;
286 ata_qc_cb_t complete_fn;
288 struct completion *waiting;
293 struct ata_host_stats {
294 unsigned long unhandled_irq;
295 unsigned long idle_irq;
296 unsigned long rw_reqbuf;
300 u64 n_sectors; /* size of device, if ATA */
301 unsigned long flags; /* ATA_DFLAG_xxx */
302 unsigned int class; /* ATA_DEV_xxx */
303 unsigned int devno; /* 0 or 1 */
304 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
308 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
310 unsigned int multi_count; /* sectors count for
311 READ/WRITE MULTIPLE */
313 /* for CHS addressing */
314 u16 cylinders; /* Number of cylinders */
315 u16 heads; /* Number of heads */
316 u16 sectors; /* Number of sectors per track */
320 struct Scsi_Host *host; /* our co-allocated scsi host */
321 const struct ata_port_operations *ops;
322 unsigned long flags; /* ATA_FLAG_xxx */
323 unsigned int id; /* unique id req'd by scsi midlyr */
324 unsigned int port_no; /* unique port #; from zero */
325 unsigned int hard_port_no; /* hardware port #; from zero */
327 struct ata_prd *prd; /* our SG list */
328 dma_addr_t prd_dma; /* and its DMA mapping */
330 void *pad; /* array of DMA pad buffers */
333 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
335 u8 ctl; /* cache of ATA control register */
336 u8 last_ctl; /* Cache last written value */
337 unsigned int pio_mask;
338 unsigned int mwdma_mask;
339 unsigned int udma_mask;
340 unsigned int cbl; /* cable type; ATA_CBL_xxx */
341 unsigned int cdb_len;
343 struct ata_device device[ATA_MAX_DEVICES];
345 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
346 unsigned long qactive;
347 unsigned int active_tag;
349 struct ata_host_stats stats;
350 struct ata_host_set *host_set;
352 struct work_struct packet_task;
354 struct work_struct pio_task;
355 unsigned int hsm_task_state;
356 unsigned long pio_task_timeout;
361 struct ata_port_operations {
362 void (*port_disable) (struct ata_port *);
364 void (*dev_config) (struct ata_port *, struct ata_device *);
366 void (*set_piomode) (struct ata_port *, struct ata_device *);
367 void (*set_dmamode) (struct ata_port *, struct ata_device *);
369 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
370 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
372 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
373 u8 (*check_status)(struct ata_port *ap);
374 u8 (*check_altstatus)(struct ata_port *ap);
375 void (*dev_select)(struct ata_port *ap, unsigned int device);
377 void (*phy_reset) (struct ata_port *ap);
378 void (*post_set_mode) (struct ata_port *ap);
380 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
382 void (*bmdma_setup) (struct ata_queued_cmd *qc);
383 void (*bmdma_start) (struct ata_queued_cmd *qc);
385 void (*qc_prep) (struct ata_queued_cmd *qc);
386 int (*qc_issue) (struct ata_queued_cmd *qc);
388 void (*eng_timeout) (struct ata_port *ap);
390 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
391 void (*irq_clear) (struct ata_port *);
393 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
394 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
397 int (*port_start) (struct ata_port *ap);
398 void (*port_stop) (struct ata_port *ap);
400 void (*host_stop) (struct ata_host_set *host_set);
402 void (*bmdma_stop) (struct ata_queued_cmd *qc);
403 u8 (*bmdma_status) (struct ata_port *ap);
406 struct ata_port_info {
407 struct scsi_host_template *sht;
408 unsigned long host_flags;
409 unsigned long pio_mask;
410 unsigned long mwdma_mask;
411 unsigned long udma_mask;
412 const struct ata_port_operations *port_ops;
417 unsigned short mode; /* ATA mode */
418 unsigned short setup; /* t1 */
419 unsigned short act8b; /* t2 for 8-bit I/O */
420 unsigned short rec8b; /* t2i for 8-bit I/O */
421 unsigned short cyc8b; /* t0 for 8-bit I/O */
422 unsigned short active; /* t2 or tD */
423 unsigned short recover; /* t2i or tK */
424 unsigned short cycle; /* t0 */
425 unsigned short udma; /* t2CYCTYP/2 */
428 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
430 extern void ata_port_probe(struct ata_port *);
431 extern void __sata_phy_reset(struct ata_port *ap);
432 extern void sata_phy_reset(struct ata_port *ap);
433 extern void ata_bus_reset(struct ata_port *ap);
434 extern void ata_port_disable(struct ata_port *);
435 extern void ata_std_ports(struct ata_ioports *ioaddr);
437 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
438 unsigned int n_ports);
439 extern void ata_pci_remove_one (struct pci_dev *pdev);
440 #endif /* CONFIG_PCI */
441 extern int ata_device_add(const struct ata_probe_ent *ent);
442 extern void ata_host_set_remove(struct ata_host_set *host_set);
443 extern int ata_scsi_detect(struct scsi_host_template *sht);
444 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
445 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
446 extern int ata_scsi_error(struct Scsi_Host *host);
447 extern int ata_scsi_release(struct Scsi_Host *host);
448 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
449 extern int ata_ratelimit(void);
452 * Default driver ops implementations
454 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
455 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
456 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
457 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
458 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
459 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
460 extern u8 ata_check_status(struct ata_port *ap);
461 extern u8 ata_altstatus(struct ata_port *ap);
462 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
463 extern int ata_port_start (struct ata_port *ap);
464 extern void ata_port_stop (struct ata_port *ap);
465 extern void ata_host_stop (struct ata_host_set *host_set);
466 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
467 extern void ata_qc_prep(struct ata_queued_cmd *qc);
468 extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
469 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
470 unsigned int buflen);
471 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
472 unsigned int n_elem);
473 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
474 extern void ata_dev_id_string(const u16 *id, unsigned char *s,
475 unsigned int ofs, unsigned int len);
476 extern void ata_dev_config(struct ata_port *ap, unsigned int i);
477 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
478 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
479 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
480 extern u8 ata_bmdma_status(struct ata_port *ap);
481 extern void ata_bmdma_irq_clear(struct ata_port *ap);
482 extern void ata_qc_complete(struct ata_queued_cmd *qc);
483 extern void ata_eng_timeout(struct ata_port *ap);
484 extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd,
485 void (*done)(struct scsi_cmnd *));
486 extern int ata_std_bios_param(struct scsi_device *sdev,
487 struct block_device *bdev,
488 sector_t capacity, int geom[]);
489 extern int ata_scsi_slave_config(struct scsi_device *sdev);
494 extern int ata_timing_compute(struct ata_device *, unsigned short,
495 struct ata_timing *, int, int);
496 extern void ata_timing_merge(const struct ata_timing *,
497 const struct ata_timing *, struct ata_timing *,
501 ATA_TIMING_SETUP = (1 << 0),
502 ATA_TIMING_ACT8B = (1 << 1),
503 ATA_TIMING_REC8B = (1 << 2),
504 ATA_TIMING_CYC8B = (1 << 3),
505 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
507 ATA_TIMING_ACTIVE = (1 << 4),
508 ATA_TIMING_RECOVER = (1 << 5),
509 ATA_TIMING_CYCLE = (1 << 6),
510 ATA_TIMING_UDMA = (1 << 7),
511 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
512 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
513 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
514 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
520 unsigned int reg; /* PCI config register to read */
521 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
526 extern void ata_pci_host_stop (struct ata_host_set *host_set);
527 extern struct ata_probe_ent *
528 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
529 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
531 #endif /* CONFIG_PCI */
535 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
537 if (sg == &qc->pad_sgent)
541 if (((sg - qc->__sg) + 1) == qc->n_elem)
546 static inline struct scatterlist *
547 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
549 if (sg == &qc->pad_sgent)
551 if (++sg - qc->__sg < qc->n_elem)
553 return qc->pad_len ? &qc->pad_sgent : NULL;
556 #define ata_for_each_sg(sg, qc) \
557 for (sg = qc->__sg; sg; sg = ata_qc_next_sg(sg, qc))
559 static inline unsigned int ata_tag_valid(unsigned int tag)
561 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
564 static inline unsigned int ata_dev_present(const struct ata_device *dev)
566 return ((dev->class == ATA_DEV_ATA) ||
567 (dev->class == ATA_DEV_ATAPI));
570 static inline u8 ata_chk_status(struct ata_port *ap)
572 return ap->ops->check_status(ap);
577 * ata_pause - Flush writes and pause 400 nanoseconds.
578 * @ap: Port to wait for.
581 * Inherited from caller.
584 static inline void ata_pause(struct ata_port *ap)
592 * ata_busy_wait - Wait for a port status register
593 * @ap: Port to wait for.
595 * Waits up to max*10 microseconds for the selected bits in the port's
596 * status register to be cleared.
597 * Returns final value of status register.
600 * Inherited from caller.
603 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
610 status = ata_chk_status(ap);
612 } while ((status & bits) && (max > 0));
619 * ata_wait_idle - Wait for a port to be idle.
620 * @ap: Port to wait for.
622 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
623 * Returns final value of status register.
626 * Inherited from caller.
629 static inline u8 ata_wait_idle(struct ata_port *ap)
631 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
633 if (status & (ATA_BUSY | ATA_DRQ)) {
634 unsigned long l = ap->ioaddr.status_addr;
636 "ATA: abnormal status 0x%X on port 0x%lX\n",
643 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
645 qc->tf.ctl |= ATA_NIEN;
648 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
651 if (likely(ata_tag_valid(tag)))
652 return &ap->qcmd[tag];
656 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
658 memset(tf, 0, sizeof(*tf));
662 tf->device = ATA_DEVICE_OBS;
664 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
667 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
671 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
673 qc->nbytes = qc->curbytes = 0;
676 ata_tf_init(qc->ap, &qc->tf, qc->dev->devno);
681 * ata_irq_on - Enable interrupts on a port.
682 * @ap: Port on which interrupts are enabled.
684 * Enable interrupts on a legacy IDE device using MMIO or PIO,
685 * wait for idle, clear any pending interrupts.
688 * Inherited from caller.
691 static inline u8 ata_irq_on(struct ata_port *ap)
693 struct ata_ioports *ioaddr = &ap->ioaddr;
696 ap->ctl &= ~ATA_NIEN;
697 ap->last_ctl = ap->ctl;
699 if (ap->flags & ATA_FLAG_MMIO)
700 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
702 outb(ap->ctl, ioaddr->ctl_addr);
703 tmp = ata_wait_idle(ap);
705 ap->ops->irq_clear(ap);
712 * ata_irq_ack - Acknowledge a device interrupt.
713 * @ap: Port on which interrupts are enabled.
715 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
716 * or BUSY+DRQ clear). Obtain dma status and port status from
717 * device. Clear the interrupt. Return port status.
722 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
724 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
725 u8 host_stat, post_stat, status;
727 status = ata_busy_wait(ap, bits, 1000);
729 DPRINTK("abnormal status 0x%X\n", status);
731 /* get controller status; clear intr, err bits */
732 if (ap->flags & ATA_FLAG_MMIO) {
733 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
734 host_stat = readb(mmio + ATA_DMA_STATUS);
735 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
736 mmio + ATA_DMA_STATUS);
738 post_stat = readb(mmio + ATA_DMA_STATUS);
740 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
741 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
742 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
744 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
747 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
748 host_stat, post_stat, status);
753 static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
755 return ap->ops->scr_read(ap, reg);
758 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
760 ap->ops->scr_write(ap, reg, val);
763 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
766 ap->ops->scr_write(ap, reg, val);
767 (void) ap->ops->scr_read(ap, reg);
770 static inline unsigned int sata_dev_present(struct ata_port *ap)
772 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
775 static inline int ata_try_flush_cache(const struct ata_device *dev)
777 return ata_id_wcache_enabled(dev->id) ||
778 ata_id_has_flush(dev->id) ||
779 ata_id_has_flush_ext(dev->id);
782 static inline unsigned int ac_err_mask(u8 status)
784 if (status & ATA_BUSY)
785 return AC_ERR_ATA_BUS;
786 if (status & (ATA_ERR | ATA_DF))
791 static inline unsigned int __ac_err_mask(u8 status)
793 unsigned int mask = ac_err_mask(status);
799 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
802 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
803 &ap->pad_dma, GFP_KERNEL);
804 return (ap->pad == NULL) ? -ENOMEM : 0;
807 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
809 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
812 #endif /* __LINUX_LIBATA_H__ */