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>
33 #include <linux/ata.h>
34 #include <linux/workqueue.h>
37 * compile-time options
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 */
48 /* note: prints function name for you */
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)
54 #define VPRINTK(fmt, args...)
55 #endif /* ATA_VERBOSE_DEBUG */
57 #define DPRINTK(fmt, args...)
58 #define VPRINTK(fmt, args...)
59 #endif /* ATA_DEBUG */
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__); \
71 /* defines only for the constants which don't work well as enums */
72 #define ATA_TAG_POISON 0xfafbfcfdU
74 /* move to PCI layer? */
75 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
81 /* various global constants */
82 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
86 ATA_MAX_SECTORS = 200, /* FIXME */
88 ATA_DEF_BUSY_WAIT = 10000,
89 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
92 ATA_SHT_CMD_PER_LUN = 1,
94 ATA_SHT_USE_CLUSTERING = 1,
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 ATA_DFLAG_CDB_INTR = (1 << 4), /* device asserts INTRQ when ready for CDB */
103 ATA_DEV_UNKNOWN = 0, /* unknown device */
104 ATA_DEV_ATA = 1, /* ATA device */
105 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
106 ATA_DEV_ATAPI = 3, /* ATAPI device */
107 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
108 ATA_DEV_NONE = 5, /* no device */
110 /* struct ata_port flags */
111 ATA_FLAG_SLAVE_POSS = (1 << 1), /* host supports slave dev */
112 /* (doesn't imply presence) */
113 ATA_FLAG_PORT_DISABLED = (1 << 2), /* port is disabled, ignore it */
114 ATA_FLAG_SATA = (1 << 3),
115 ATA_FLAG_NO_LEGACY = (1 << 4), /* no legacy mode check */
116 ATA_FLAG_SRST = (1 << 5), /* use ATA SRST, not E.D.D. */
117 ATA_FLAG_MMIO = (1 << 6), /* use MMIO, not PIO */
118 ATA_FLAG_SATA_RESET = (1 << 7), /* use COMRESET */
119 ATA_FLAG_PIO_DMA = (1 << 8), /* PIO cmds via DMA */
120 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
121 * doesn't handle PIO interrupts */
123 ATA_QCFLAG_ACTIVE = (1 << 1), /* cmd not yet ack'd to scsi lyer */
124 ATA_QCFLAG_SG = (1 << 3), /* have s/g table? */
125 ATA_QCFLAG_SINGLE = (1 << 4), /* no s/g, just a single buffer */
126 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
128 /* various lengths of time */
129 ATA_TMOUT_EDD = 5 * HZ, /* hueristic */
130 ATA_TMOUT_PIO = 30 * HZ,
131 ATA_TMOUT_BOOT = 30 * HZ, /* hueristic */
132 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* hueristic */
133 ATA_TMOUT_DATAOUT = 30 * HZ,
134 ATA_TMOUT_DATAOUT_QUICK = 5 * HZ,
148 /* SATA port states */
153 /* encoding various smaller bitmaps into a single
154 * unsigned long bitmap
160 /* size of buffer to pad xfers ending on unaligned boundaries */
162 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
164 /* Masks for port functions */
165 ATA_PORT_PRIMARY = (1 << 0),
166 ATA_PORT_SECONDARY = (1 << 1),
169 enum hsm_task_states {
170 HSM_ST_UNKNOWN, /* state unknown */
171 HSM_ST_IDLE, /* no command on going */
172 HSM_ST_POLL, /* same as HSM_ST, waits longer */
173 HSM_ST_TMOUT, /* timeout */
174 HSM_ST, /* (waiting the device to) transfer data */
175 HSM_ST_LAST, /* (waiting the device to) complete command */
176 HSM_ST_LAST_POLL, /* same as HSM_ST_LAST, waits longer */
177 HSM_ST_ERR, /* error */
178 HSM_ST_FIRST, /* (waiting the device to)
179 write CDB or first data block */
182 enum ata_completion_errors {
183 AC_ERR_OTHER = (1 << 0),
184 AC_ERR_DEV = (1 << 1),
185 AC_ERR_ATA_BUS = (1 << 2),
186 AC_ERR_HOST_BUS = (1 << 3),
189 /* forward declarations */
191 struct ata_port_operations;
193 struct ata_queued_cmd;
196 typedef int (*ata_qc_cb_t) (struct ata_queued_cmd *qc, unsigned int err_mask);
199 unsigned long cmd_addr;
200 unsigned long data_addr;
201 unsigned long error_addr;
202 unsigned long feature_addr;
203 unsigned long nsect_addr;
204 unsigned long lbal_addr;
205 unsigned long lbam_addr;
206 unsigned long lbah_addr;
207 unsigned long device_addr;
208 unsigned long status_addr;
209 unsigned long command_addr;
210 unsigned long altstatus_addr;
211 unsigned long ctl_addr;
212 unsigned long bmdma_addr;
213 unsigned long scr_addr;
216 struct ata_probe_ent {
217 struct list_head node;
219 const struct ata_port_operations *port_ops;
220 Scsi_Host_Template *sht;
221 struct ata_ioports port[ATA_MAX_PORTS];
222 unsigned int n_ports;
223 unsigned int hard_port_no;
224 unsigned int pio_mask;
225 unsigned int mwdma_mask;
226 unsigned int udma_mask;
227 unsigned int legacy_mode;
229 unsigned int irq_flags;
230 unsigned long host_flags;
231 void __iomem *mmio_base;
235 struct ata_host_set {
239 void __iomem *mmio_base;
240 unsigned int n_ports;
242 const struct ata_port_operations *ops;
243 struct ata_port * ports[0];
246 struct ata_queued_cmd {
248 struct ata_device *dev;
250 struct scsi_cmnd *scsicmd;
251 void (*scsidone)(struct scsi_cmnd *);
253 struct ata_taskfile tf;
254 u8 cdb[ATAPI_CDB_LEN];
256 unsigned long flags; /* ATA_QCFLAG_xxx */
259 unsigned int orig_n_elem;
263 unsigned int pad_len;
266 unsigned int cursect;
269 unsigned int curbytes;
272 unsigned int cursg_ofs;
274 struct scatterlist sgent;
275 struct scatterlist pad_sgent;
278 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
279 struct scatterlist *__sg;
281 ata_qc_cb_t complete_fn;
283 struct completion *waiting;
288 struct ata_host_stats {
289 unsigned long unhandled_irq;
290 unsigned long idle_irq;
291 unsigned long rw_reqbuf;
295 u64 n_sectors; /* size of device, if ATA */
296 unsigned long flags; /* ATA_DFLAG_xxx */
297 unsigned int class; /* ATA_DEV_xxx */
298 unsigned int devno; /* 0 or 1 */
299 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
303 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
305 unsigned int multi_count; /* sectors count for
306 READ/WRITE MULTIPLE */
308 /* for CHS addressing */
309 u16 cylinders; /* Number of cylinders */
310 u16 heads; /* Number of heads */
311 u16 sectors; /* Number of sectors per track */
315 struct Scsi_Host *host; /* our co-allocated scsi host */
316 const struct ata_port_operations *ops;
317 unsigned long flags; /* ATA_FLAG_xxx */
318 unsigned int id; /* unique id req'd by scsi midlyr */
319 unsigned int port_no; /* unique port #; from zero */
320 unsigned int hard_port_no; /* hardware port #; from zero */
322 struct ata_prd *prd; /* our SG list */
323 dma_addr_t prd_dma; /* and its DMA mapping */
325 void *pad; /* array of DMA pad buffers */
328 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
330 u8 ctl; /* cache of ATA control register */
331 u8 last_ctl; /* Cache last written value */
332 unsigned int bus_state;
333 unsigned int port_state;
334 unsigned int pio_mask;
335 unsigned int mwdma_mask;
336 unsigned int udma_mask;
337 unsigned int cbl; /* cable type; ATA_CBL_xxx */
338 unsigned int cdb_len;
340 struct ata_device device[ATA_MAX_DEVICES];
342 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
343 unsigned long qactive;
344 unsigned int active_tag;
346 struct ata_host_stats stats;
347 struct ata_host_set *host_set;
349 struct work_struct dataout_task;
351 struct work_struct pio_task;
352 unsigned int hsm_task_state;
353 unsigned long pio_task_timeout;
358 struct ata_port_operations {
359 void (*port_disable) (struct ata_port *);
361 void (*dev_config) (struct ata_port *, struct ata_device *);
363 void (*set_piomode) (struct ata_port *, struct ata_device *);
364 void (*set_dmamode) (struct ata_port *, struct ata_device *);
366 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
367 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
369 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
370 u8 (*check_status)(struct ata_port *ap);
371 u8 (*check_altstatus)(struct ata_port *ap);
372 void (*dev_select)(struct ata_port *ap, unsigned int device);
374 void (*phy_reset) (struct ata_port *ap);
375 void (*post_set_mode) (struct ata_port *ap);
377 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
379 void (*bmdma_setup) (struct ata_queued_cmd *qc);
380 void (*bmdma_start) (struct ata_queued_cmd *qc);
382 void (*qc_prep) (struct ata_queued_cmd *qc);
383 int (*qc_issue) (struct ata_queued_cmd *qc);
385 void (*eng_timeout) (struct ata_port *ap);
387 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
388 void (*irq_clear) (struct ata_port *);
390 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
391 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
394 int (*port_start) (struct ata_port *ap);
395 void (*port_stop) (struct ata_port *ap);
397 void (*host_stop) (struct ata_host_set *host_set);
399 void (*bmdma_stop) (struct ata_queued_cmd *qc);
400 u8 (*bmdma_status) (struct ata_port *ap);
403 struct ata_port_info {
404 Scsi_Host_Template *sht;
405 unsigned long host_flags;
406 unsigned long pio_mask;
407 unsigned long mwdma_mask;
408 unsigned long udma_mask;
409 const struct ata_port_operations *port_ops;
413 unsigned short mode; /* ATA mode */
414 unsigned short setup; /* t1 */
415 unsigned short act8b; /* t2 for 8-bit I/O */
416 unsigned short rec8b; /* t2i for 8-bit I/O */
417 unsigned short cyc8b; /* t0 for 8-bit I/O */
418 unsigned short active; /* t2 or tD */
419 unsigned short recover; /* t2i or tK */
420 unsigned short cycle; /* t0 */
421 unsigned short udma; /* t2CYCTYP/2 */
424 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
426 extern void ata_port_probe(struct ata_port *);
427 extern void __sata_phy_reset(struct ata_port *ap);
428 extern void sata_phy_reset(struct ata_port *ap);
429 extern void ata_bus_reset(struct ata_port *ap);
430 extern void ata_port_disable(struct ata_port *);
431 extern void ata_std_ports(struct ata_ioports *ioaddr);
433 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
434 unsigned int n_ports);
435 extern void ata_pci_remove_one (struct pci_dev *pdev);
436 #endif /* CONFIG_PCI */
437 extern int ata_device_add(const struct ata_probe_ent *ent);
438 extern void ata_host_set_remove(struct ata_host_set *host_set);
439 extern int ata_scsi_detect(Scsi_Host_Template *sht);
440 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
441 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
442 extern int ata_scsi_error(struct Scsi_Host *host);
443 extern int ata_scsi_release(struct Scsi_Host *host);
444 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
445 extern int ata_ratelimit(void);
448 * Default driver ops implementations
450 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
451 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
452 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
453 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
454 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
455 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
456 extern u8 ata_check_status(struct ata_port *ap);
457 extern u8 ata_altstatus(struct ata_port *ap);
458 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
459 extern int ata_port_start (struct ata_port *ap);
460 extern void ata_port_stop (struct ata_port *ap);
461 extern void ata_host_stop (struct ata_host_set *host_set);
462 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
463 extern void ata_qc_prep(struct ata_queued_cmd *qc);
464 extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
465 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
466 unsigned int buflen);
467 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
468 unsigned int n_elem);
469 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
470 extern void ata_dev_id_string(const u16 *id, unsigned char *s,
471 unsigned int ofs, unsigned int len);
472 extern void ata_dev_config(struct ata_port *ap, unsigned int i);
473 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
474 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
475 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
476 extern u8 ata_bmdma_status(struct ata_port *ap);
477 extern void ata_bmdma_irq_clear(struct ata_port *ap);
478 extern void ata_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask);
479 extern void ata_eng_timeout(struct ata_port *ap);
480 extern void ata_scsi_simulate(u16 *id, struct scsi_cmnd *cmd,
481 void (*done)(struct scsi_cmnd *));
482 extern int ata_std_bios_param(struct scsi_device *sdev,
483 struct block_device *bdev,
484 sector_t capacity, int geom[]);
485 extern int ata_scsi_slave_config(struct scsi_device *sdev);
490 extern int ata_timing_compute(struct ata_device *, unsigned short,
491 struct ata_timing *, int, int);
492 extern void ata_timing_merge(const struct ata_timing *,
493 const struct ata_timing *, struct ata_timing *,
497 ATA_TIMING_SETUP = (1 << 0),
498 ATA_TIMING_ACT8B = (1 << 1),
499 ATA_TIMING_REC8B = (1 << 2),
500 ATA_TIMING_CYC8B = (1 << 3),
501 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
503 ATA_TIMING_ACTIVE = (1 << 4),
504 ATA_TIMING_RECOVER = (1 << 5),
505 ATA_TIMING_CYCLE = (1 << 6),
506 ATA_TIMING_UDMA = (1 << 7),
507 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
508 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
509 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
510 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
516 unsigned int reg; /* PCI config register to read */
517 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
522 extern void ata_pci_host_stop (struct ata_host_set *host_set);
523 extern struct ata_probe_ent *
524 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
525 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
527 #endif /* CONFIG_PCI */
531 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
533 if (sg == &qc->pad_sgent)
537 if (((sg - qc->__sg) + 1) == qc->n_elem)
542 static inline struct scatterlist *
543 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
545 if (sg == &qc->pad_sgent)
547 if (++sg - qc->__sg < qc->n_elem)
549 return qc->pad_len ? &qc->pad_sgent : NULL;
552 #define ata_for_each_sg(sg, qc) \
553 for (sg = qc->__sg; sg; sg = ata_qc_next_sg(sg, qc))
555 static inline unsigned int ata_tag_valid(unsigned int tag)
557 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
560 static inline unsigned int ata_dev_present(const struct ata_device *dev)
562 return ((dev->class == ATA_DEV_ATA) ||
563 (dev->class == ATA_DEV_ATAPI));
566 static inline u8 ata_chk_status(struct ata_port *ap)
568 return ap->ops->check_status(ap);
573 * ata_pause - Flush writes and pause 400 nanoseconds.
574 * @ap: Port to wait for.
577 * Inherited from caller.
580 static inline void ata_pause(struct ata_port *ap)
588 * ata_busy_wait - Wait for a port status register
589 * @ap: Port to wait for.
591 * Waits up to max*10 microseconds for the selected bits in the port's
592 * status register to be cleared.
593 * Returns final value of status register.
596 * Inherited from caller.
599 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
606 status = ata_chk_status(ap);
608 } while ((status & bits) && (max > 0));
615 * ata_wait_idle - Wait for a port to be idle.
616 * @ap: Port to wait for.
618 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
619 * Returns final value of status register.
622 * Inherited from caller.
625 static inline u8 ata_wait_idle(struct ata_port *ap)
627 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
629 if (status & (ATA_BUSY | ATA_DRQ)) {
630 unsigned long l = ap->ioaddr.status_addr;
632 "ATA: abnormal status 0x%X on port 0x%lX\n",
639 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
641 qc->tf.ctl |= ATA_NIEN;
644 static inline struct ata_queued_cmd *ata_qc_from_tag (struct ata_port *ap,
647 if (likely(ata_tag_valid(tag)))
648 return &ap->qcmd[tag];
652 static inline void ata_tf_init(struct ata_port *ap, struct ata_taskfile *tf, unsigned int device)
654 memset(tf, 0, sizeof(*tf));
658 tf->device = ATA_DEVICE_OBS;
660 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
665 * ata_irq_on - Enable interrupts on a port.
666 * @ap: Port on which interrupts are enabled.
668 * Enable interrupts on a legacy IDE device using MMIO or PIO,
669 * wait for idle, clear any pending interrupts.
672 * Inherited from caller.
675 static inline u8 ata_irq_on(struct ata_port *ap)
677 struct ata_ioports *ioaddr = &ap->ioaddr;
680 ap->ctl &= ~ATA_NIEN;
681 ap->last_ctl = ap->ctl;
683 if (ap->flags & ATA_FLAG_MMIO)
684 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
686 outb(ap->ctl, ioaddr->ctl_addr);
687 tmp = ata_wait_idle(ap);
689 ap->ops->irq_clear(ap);
696 * ata_irq_ack - Acknowledge a device interrupt.
697 * @ap: Port on which interrupts are enabled.
699 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
700 * or BUSY+DRQ clear). Obtain dma status and port status from
701 * device. Clear the interrupt. Return port status.
706 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
708 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
709 u8 host_stat, post_stat, status;
711 status = ata_busy_wait(ap, bits, 1000);
713 DPRINTK("abnormal status 0x%X\n", status);
715 /* get controller status; clear intr, err bits */
716 if (ap->flags & ATA_FLAG_MMIO) {
717 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
718 host_stat = readb(mmio + ATA_DMA_STATUS);
719 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
720 mmio + ATA_DMA_STATUS);
722 post_stat = readb(mmio + ATA_DMA_STATUS);
724 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
725 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
726 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
728 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
731 VPRINTK("irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
732 host_stat, post_stat, status);
737 static inline u32 scr_read(struct ata_port *ap, unsigned int reg)
739 return ap->ops->scr_read(ap, reg);
742 static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
744 ap->ops->scr_write(ap, reg, val);
747 static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
750 ap->ops->scr_write(ap, reg, val);
751 (void) ap->ops->scr_read(ap, reg);
754 static inline unsigned int sata_dev_present(struct ata_port *ap)
756 return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;
759 static inline int ata_try_flush_cache(const struct ata_device *dev)
761 return ata_id_wcache_enabled(dev->id) ||
762 ata_id_has_flush(dev->id) ||
763 ata_id_has_flush_ext(dev->id);
766 static inline unsigned int ac_err_mask(u8 status)
768 if (status & ATA_BUSY)
769 return AC_ERR_ATA_BUS;
770 if (status & (ATA_ERR | ATA_DF))
775 static inline unsigned int __ac_err_mask(u8 status)
777 unsigned int mask = ac_err_mask(status);
783 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
786 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
787 &ap->pad_dma, GFP_KERNEL);
788 return (ap->pad == NULL) ? -ENOMEM : 0;
791 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
793 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
796 #endif /* __LINUX_LIBATA_H__ */