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>
33 #include <asm/scatterlist.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
39 #include <asm/libata-portmap.h>
42 * compile-time options: to be removed as soon as all the drivers are
43 * converted to the new debugging mechanism
45 #undef ATA_DEBUG /* debugging output */
46 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
47 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
48 #undef ATA_NDEBUG /* define to disable quick runtime checks */
49 #undef ATA_ENABLE_PATA /* define to enable PATA support in some
50 * low-level drivers */
53 /* note: prints function name for you */
55 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
56 #ifdef ATA_VERBOSE_DEBUG
57 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
59 #define VPRINTK(fmt, args...)
60 #endif /* ATA_VERBOSE_DEBUG */
62 #define DPRINTK(fmt, args...)
63 #define VPRINTK(fmt, args...)
64 #endif /* ATA_DEBUG */
66 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
68 /* NEW: debug levels */
69 #define HAVE_LIBATA_MSG 1
73 ATA_MSG_INFO = 0x0002,
74 ATA_MSG_PROBE = 0x0004,
75 ATA_MSG_WARN = 0x0008,
76 ATA_MSG_MALLOC = 0x0010,
78 ATA_MSG_INTR = 0x0040,
82 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
83 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
84 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
85 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
86 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
87 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
88 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
89 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
91 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
93 if (dval < 0 || dval >= (sizeof(u32) * 8))
94 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
97 return (1 << dval) - 1;
100 /* defines only for the constants which don't work well as enums */
101 #define ATA_TAG_POISON 0xfafbfcfdU
103 /* move to PCI layer? */
104 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
110 /* various global constants */
111 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
114 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
116 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
117 ATA_MAX_SECTORS = 200, /* FIXME */
118 ATA_MAX_SECTORS_LBA48 = 65535,
120 ATA_DEF_BUSY_WAIT = 10000,
121 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
123 ATA_SHT_EMULATED = 1,
124 ATA_SHT_CMD_PER_LUN = 1,
125 ATA_SHT_THIS_ID = -1,
126 ATA_SHT_USE_CLUSTERING = 1,
128 /* struct ata_device stuff */
129 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
130 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
131 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
132 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
133 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
135 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */
136 ATA_DFLAG_SUSPENDED = (1 << 9), /* device suspended */
137 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
139 ATA_DFLAG_DETACH = (1 << 16),
140 ATA_DFLAG_DETACHED = (1 << 17),
142 ATA_DEV_UNKNOWN = 0, /* unknown device */
143 ATA_DEV_ATA = 1, /* ATA device */
144 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
145 ATA_DEV_ATAPI = 3, /* ATAPI device */
146 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
147 ATA_DEV_NONE = 5, /* no device */
149 /* struct ata_port flags */
150 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
151 /* (doesn't imply presence) */
152 ATA_FLAG_SATA = (1 << 1),
153 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
154 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
155 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
156 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
157 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
158 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
159 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
160 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
161 * doesn't handle PIO interrupts */
162 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
163 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
164 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
165 * Register FIS clearing BSY */
166 ATA_FLAG_DEBUGMSG = (1 << 13),
168 /* The following flag belongs to ap->pflags but is kept in
169 * ap->flags because it's referenced in many LLDs and will be
170 * removed in not-too-distant future.
172 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
174 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
176 /* struct ata_port pflags */
177 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
178 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
179 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
180 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
181 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
182 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
183 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
185 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
186 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
187 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
189 /* struct ata_queued_cmd flags */
190 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
191 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
192 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
193 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
194 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
195 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
197 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
198 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
199 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
202 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */
204 /* various lengths of time */
205 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
206 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
207 ATA_TMOUT_INTERNAL = 30 * HZ,
208 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
222 /* SATA port states */
227 /* encoding various smaller bitmaps into a single
228 * unsigned int bitmap
235 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
236 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
238 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
239 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
240 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
242 /* size of buffer to pad xfers ending on unaligned boundaries */
244 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
246 /* masks for port functions */
247 ATA_PORT_PRIMARY = (1 << 0),
248 ATA_PORT_SECONDARY = (1 << 1),
253 /* desc_len for ata_eh_info and context */
254 ATA_EH_DESC_LEN = 80,
256 /* reset / recovery action types */
257 ATA_EH_REVALIDATE = (1 << 0),
258 ATA_EH_SOFTRESET = (1 << 1),
259 ATA_EH_HARDRESET = (1 << 2),
260 ATA_EH_SUSPEND = (1 << 3),
261 ATA_EH_RESUME = (1 << 4),
262 ATA_EH_PM_FREEZE = (1 << 5),
264 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
265 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
266 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
268 /* ata_eh_info->flags */
269 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
270 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
271 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
272 ATA_EHI_QUIET = (1 << 3), /* be quiet */
274 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
276 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
278 /* max repeat if error condition is still set after ->error_handler */
279 ATA_EH_MAX_REPEAT = 5,
281 /* how hard are we gonna try to probe/recover devices */
282 ATA_PROBE_MAX_TRIES = 3,
283 ATA_EH_RESET_TRIES = 3,
284 ATA_EH_DEV_TRIES = 3,
286 /* Drive spinup time (time from power-on to the first D2H FIS)
287 * in msecs - 8s currently. Failing to get ready in this time
288 * isn't critical. It will result in reset failure for
289 * controllers which can't wait for the first D2H FIS. libata
290 * will retry, so it just has to be long enough to spin up
293 ATA_SPINUP_WAIT = 8000,
296 enum hsm_task_states {
297 HSM_ST_UNKNOWN, /* state unknown */
298 HSM_ST_IDLE, /* no command on going */
299 HSM_ST, /* (waiting the device to) transfer data */
300 HSM_ST_LAST, /* (waiting the device to) complete command */
301 HSM_ST_ERR, /* error */
302 HSM_ST_FIRST, /* (waiting the device to)
303 write CDB or first data block */
306 enum ata_completion_errors {
307 AC_ERR_DEV = (1 << 0), /* device reported error */
308 AC_ERR_HSM = (1 << 1), /* host state machine violation */
309 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
310 AC_ERR_MEDIA = (1 << 3), /* media error */
311 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
312 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
313 AC_ERR_SYSTEM = (1 << 6), /* system error */
314 AC_ERR_INVALID = (1 << 7), /* invalid argument */
315 AC_ERR_OTHER = (1 << 8), /* unknown */
318 /* forward declarations */
320 struct ata_port_operations;
322 struct ata_queued_cmd;
325 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
326 typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
327 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
328 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
331 unsigned long cmd_addr;
332 unsigned long data_addr;
333 unsigned long error_addr;
334 unsigned long feature_addr;
335 unsigned long nsect_addr;
336 unsigned long lbal_addr;
337 unsigned long lbam_addr;
338 unsigned long lbah_addr;
339 unsigned long device_addr;
340 unsigned long status_addr;
341 unsigned long command_addr;
342 unsigned long altstatus_addr;
343 unsigned long ctl_addr;
344 unsigned long bmdma_addr;
345 unsigned long scr_addr;
348 struct ata_probe_ent {
349 struct list_head node;
351 const struct ata_port_operations *port_ops;
352 struct scsi_host_template *sht;
353 struct ata_ioports port[ATA_MAX_PORTS];
354 unsigned int n_ports;
355 unsigned int dummy_port_mask;
356 unsigned int pio_mask;
357 unsigned int mwdma_mask;
358 unsigned int udma_mask;
361 unsigned int irq_flags;
362 unsigned long host_flags;
363 unsigned long host_set_flags;
364 void __iomem *mmio_base;
368 struct ata_host_set {
373 void __iomem *mmio_base;
374 unsigned int n_ports;
376 const struct ata_port_operations *ops;
378 int simplex_claimed; /* Keep seperate in case we
379 ever need to do this locked */
380 struct ata_port *ports[0];
383 struct ata_queued_cmd {
385 struct ata_device *dev;
387 struct scsi_cmnd *scsicmd;
388 void (*scsidone)(struct scsi_cmnd *);
390 struct ata_taskfile tf;
391 u8 cdb[ATAPI_CDB_LEN];
393 unsigned long flags; /* ATA_QCFLAG_xxx */
396 unsigned int orig_n_elem;
400 unsigned int pad_len;
403 unsigned int cursect;
406 unsigned int curbytes;
409 unsigned int cursg_ofs;
411 struct scatterlist sgent;
412 struct scatterlist pad_sgent;
415 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
416 struct scatterlist *__sg;
418 unsigned int err_mask;
419 struct ata_taskfile result_tf;
420 ata_qc_cb_t complete_fn;
425 struct ata_host_stats {
426 unsigned long unhandled_irq;
427 unsigned long idle_irq;
428 unsigned long rw_reqbuf;
431 struct ata_ering_entry {
433 unsigned int err_mask;
439 struct ata_ering_entry ring[ATA_ERING_SIZE];
444 unsigned int devno; /* 0 or 1 */
445 unsigned long flags; /* ATA_DFLAG_xxx */
446 struct scsi_device *sdev; /* attached SCSI device */
447 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
448 u64 n_sectors; /* size of device, if ATA */
449 unsigned int class; /* ATA_DEV_xxx */
450 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
454 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
456 unsigned int multi_count; /* sectors count for
457 READ/WRITE MULTIPLE */
458 unsigned int max_sectors; /* per-device max sectors */
459 unsigned int cdb_len;
461 /* per-dev xfer mask */
462 unsigned int pio_mask;
463 unsigned int mwdma_mask;
464 unsigned int udma_mask;
466 /* for CHS addressing */
467 u16 cylinders; /* Number of cylinders */
468 u16 heads; /* Number of heads */
469 u16 sectors; /* Number of sectors per track */
472 struct ata_ering ering;
475 /* Offset into struct ata_device. Fields above it are maintained
476 * acress device init. Fields below are zeroed.
478 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
481 struct ata_device *dev; /* offending device */
482 u32 serror; /* SError from LLDD */
483 unsigned int err_mask; /* port-wide err_mask */
484 unsigned int action; /* ATA_EH_* action mask */
485 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
486 unsigned int flags; /* ATA_EHI_* flags */
488 unsigned long hotplug_timestamp;
489 unsigned int probe_mask;
491 char desc[ATA_EH_DESC_LEN];
495 struct ata_eh_context {
496 struct ata_eh_info i;
497 int tries[ATA_MAX_DEVICES];
498 unsigned int classes[ATA_MAX_DEVICES];
499 unsigned int did_probe_mask;
503 struct Scsi_Host *host; /* our co-allocated scsi host */
504 const struct ata_port_operations *ops;
506 unsigned long flags; /* ATA_FLAG_xxx */
507 unsigned int pflags; /* ATA_PFLAG_xxx */
508 unsigned int id; /* unique id req'd by scsi midlyr */
509 unsigned int port_no; /* unique port #; from zero */
511 struct ata_prd *prd; /* our SG list */
512 dma_addr_t prd_dma; /* and its DMA mapping */
514 void *pad; /* array of DMA pad buffers */
517 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
519 u8 ctl; /* cache of ATA control register */
520 u8 last_ctl; /* Cache last written value */
521 unsigned int pio_mask;
522 unsigned int mwdma_mask;
523 unsigned int udma_mask;
524 unsigned int cbl; /* cable type; ATA_CBL_xxx */
525 unsigned int hw_sata_spd_limit;
526 unsigned int sata_spd_limit; /* SATA PHY speed limit */
528 /* record runtime error info, protected by host_set lock */
529 struct ata_eh_info eh_info;
530 /* EH context owned by EH */
531 struct ata_eh_context eh_context;
533 struct ata_device device[ATA_MAX_DEVICES];
535 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
536 unsigned long qc_allocated;
537 unsigned int qc_active;
539 unsigned int active_tag;
542 struct ata_host_stats stats;
543 struct ata_host_set *host_set;
546 struct work_struct port_task;
547 struct work_struct hotplug_task;
548 struct work_struct scsi_rescan_task;
550 unsigned int hsm_task_state;
553 struct list_head eh_done_q;
554 wait_queue_head_t eh_wait_q;
556 pm_message_t pm_mesg;
561 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
564 struct ata_port_operations {
565 void (*port_disable) (struct ata_port *);
567 void (*dev_config) (struct ata_port *, struct ata_device *);
569 void (*set_piomode) (struct ata_port *, struct ata_device *);
570 void (*set_dmamode) (struct ata_port *, struct ata_device *);
571 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
573 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
574 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
576 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
577 u8 (*check_status)(struct ata_port *ap);
578 u8 (*check_altstatus)(struct ata_port *ap);
579 void (*dev_select)(struct ata_port *ap, unsigned int device);
581 void (*phy_reset) (struct ata_port *ap); /* obsolete */
582 void (*set_mode) (struct ata_port *ap);
584 void (*post_set_mode) (struct ata_port *ap);
586 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
588 void (*bmdma_setup) (struct ata_queued_cmd *qc);
589 void (*bmdma_start) (struct ata_queued_cmd *qc);
591 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
593 void (*qc_prep) (struct ata_queued_cmd *qc);
594 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
596 /* Error handlers. ->error_handler overrides ->eng_timeout and
597 * indicates that new-style EH is in place.
599 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
601 void (*freeze) (struct ata_port *ap);
602 void (*thaw) (struct ata_port *ap);
603 void (*error_handler) (struct ata_port *ap);
604 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
606 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
607 void (*irq_clear) (struct ata_port *);
609 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
610 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
613 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
614 int (*port_resume) (struct ata_port *ap);
616 int (*port_start) (struct ata_port *ap);
617 void (*port_stop) (struct ata_port *ap);
619 void (*host_stop) (struct ata_host_set *host_set);
621 void (*bmdma_stop) (struct ata_queued_cmd *qc);
622 u8 (*bmdma_status) (struct ata_port *ap);
625 struct ata_port_info {
626 struct scsi_host_template *sht;
627 unsigned long host_flags;
628 unsigned long pio_mask;
629 unsigned long mwdma_mask;
630 unsigned long udma_mask;
631 const struct ata_port_operations *port_ops;
636 unsigned short mode; /* ATA mode */
637 unsigned short setup; /* t1 */
638 unsigned short act8b; /* t2 for 8-bit I/O */
639 unsigned short rec8b; /* t2i for 8-bit I/O */
640 unsigned short cyc8b; /* t0 for 8-bit I/O */
641 unsigned short active; /* t2 or tD */
642 unsigned short recover; /* t2i or tK */
643 unsigned short cycle; /* t0 */
644 unsigned short udma; /* t2CYCTYP/2 */
647 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
649 extern const unsigned long sata_deb_timing_normal[];
650 extern const unsigned long sata_deb_timing_hotplug[];
651 extern const unsigned long sata_deb_timing_long[];
653 extern const struct ata_port_operations ata_dummy_port_ops;
655 static inline const unsigned long *
656 sata_ehc_deb_timing(struct ata_eh_context *ehc)
658 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
659 return sata_deb_timing_hotplug;
661 return sata_deb_timing_normal;
664 static inline int ata_port_is_dummy(struct ata_port *ap)
666 return ap->ops == &ata_dummy_port_ops;
669 extern void ata_port_probe(struct ata_port *);
670 extern void __sata_phy_reset(struct ata_port *ap);
671 extern void sata_phy_reset(struct ata_port *ap);
672 extern void ata_bus_reset(struct ata_port *ap);
673 extern int sata_set_spd(struct ata_port *ap);
674 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
675 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
676 extern int ata_std_prereset(struct ata_port *ap);
677 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
678 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
679 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
680 extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
681 extern void ata_port_disable(struct ata_port *);
682 extern void ata_std_ports(struct ata_ioports *ioaddr);
684 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
685 unsigned int n_ports);
686 extern void ata_pci_remove_one (struct pci_dev *pdev);
687 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
688 extern void ata_pci_device_do_resume(struct pci_dev *pdev);
689 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
690 extern int ata_pci_device_resume(struct pci_dev *pdev);
691 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
692 #endif /* CONFIG_PCI */
693 extern int ata_device_add(const struct ata_probe_ent *ent);
694 extern void ata_port_detach(struct ata_port *ap);
695 extern void ata_host_set_init(struct ata_host_set *, struct device *,
696 unsigned long, const struct ata_port_operations *);
697 extern void ata_host_set_remove(struct ata_host_set *host_set);
698 extern int ata_scsi_detect(struct scsi_host_template *sht);
699 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
700 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
701 extern int ata_scsi_release(struct Scsi_Host *host);
702 extern void ata_sas_port_destroy(struct ata_port *);
703 extern struct ata_port *ata_sas_port_alloc(struct ata_host_set *,
704 struct ata_port_info *, struct Scsi_Host *);
705 extern int ata_sas_port_init(struct ata_port *);
706 extern int ata_sas_port_start(struct ata_port *ap);
707 extern void ata_sas_port_stop(struct ata_port *ap);
708 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
709 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
710 struct ata_port *ap);
711 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
712 extern int sata_scr_valid(struct ata_port *ap);
713 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
714 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
715 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
716 extern int ata_port_online(struct ata_port *ap);
717 extern int ata_port_offline(struct ata_port *ap);
718 extern int ata_scsi_device_resume(struct scsi_device *);
719 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
720 extern int ata_host_set_suspend(struct ata_host_set *host_set,
722 extern void ata_host_set_resume(struct ata_host_set *host_set);
723 extern int ata_ratelimit(void);
724 extern unsigned int ata_busy_sleep(struct ata_port *ap,
725 unsigned long timeout_pat,
726 unsigned long timeout);
727 extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
728 void *data, unsigned long delay);
729 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
730 unsigned long interval_msec,
731 unsigned long timeout_msec);
734 * Default driver ops implementations
736 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
737 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
738 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
739 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
740 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
741 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
742 extern u8 ata_check_status(struct ata_port *ap);
743 extern u8 ata_altstatus(struct ata_port *ap);
744 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
745 extern int ata_port_start (struct ata_port *ap);
746 extern void ata_port_stop (struct ata_port *ap);
747 extern void ata_host_stop (struct ata_host_set *host_set);
748 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
749 extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
750 unsigned int buflen, int write_data);
751 extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
752 unsigned int buflen, int write_data);
753 extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
754 unsigned int buflen, int write_data);
755 extern void ata_qc_prep(struct ata_queued_cmd *qc);
756 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
757 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
758 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
759 unsigned int buflen);
760 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
761 unsigned int n_elem);
762 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
763 extern void ata_id_string(const u16 *id, unsigned char *s,
764 unsigned int ofs, unsigned int len);
765 extern void ata_id_c_string(const u16 *id, unsigned char *s,
766 unsigned int ofs, unsigned int len);
767 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
768 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
769 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
770 extern u8 ata_bmdma_status(struct ata_port *ap);
771 extern void ata_bmdma_irq_clear(struct ata_port *ap);
772 extern void ata_bmdma_freeze(struct ata_port *ap);
773 extern void ata_bmdma_thaw(struct ata_port *ap);
774 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
775 ata_reset_fn_t softreset,
776 ata_reset_fn_t hardreset,
777 ata_postreset_fn_t postreset);
778 extern void ata_bmdma_error_handler(struct ata_port *ap);
779 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
780 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
781 u8 status, int in_wq);
782 extern void ata_qc_complete(struct ata_queued_cmd *qc);
783 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
784 void (*finish_qc)(struct ata_queued_cmd *));
785 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
786 void (*done)(struct scsi_cmnd *));
787 extern int ata_std_bios_param(struct scsi_device *sdev,
788 struct block_device *bdev,
789 sector_t capacity, int geom[]);
790 extern int ata_scsi_slave_config(struct scsi_device *sdev);
791 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
792 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
794 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
800 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
801 extern int ata_timing_compute(struct ata_device *, unsigned short,
802 struct ata_timing *, int, int);
803 extern void ata_timing_merge(const struct ata_timing *,
804 const struct ata_timing *, struct ata_timing *,
808 ATA_TIMING_SETUP = (1 << 0),
809 ATA_TIMING_ACT8B = (1 << 1),
810 ATA_TIMING_REC8B = (1 << 2),
811 ATA_TIMING_CYC8B = (1 << 3),
812 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
814 ATA_TIMING_ACTIVE = (1 << 4),
815 ATA_TIMING_RECOVER = (1 << 5),
816 ATA_TIMING_CYCLE = (1 << 6),
817 ATA_TIMING_UDMA = (1 << 7),
818 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
819 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
820 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
821 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
827 unsigned int reg; /* PCI config register to read */
828 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
833 extern void ata_pci_host_stop (struct ata_host_set *host_set);
834 extern struct ata_probe_ent *
835 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
836 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
837 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
838 #endif /* CONFIG_PCI */
843 extern void ata_eng_timeout(struct ata_port *ap);
845 extern void ata_port_schedule_eh(struct ata_port *ap);
846 extern int ata_port_abort(struct ata_port *ap);
847 extern int ata_port_freeze(struct ata_port *ap);
849 extern void ata_eh_freeze_port(struct ata_port *ap);
850 extern void ata_eh_thaw_port(struct ata_port *ap);
852 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
853 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
855 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
856 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
857 ata_postreset_fn_t postreset);
862 #define ata_port_printk(ap, lv, fmt, args...) \
863 printk(lv"ata%u: "fmt, (ap)->id , ##args)
865 #define ata_dev_printk(dev, lv, fmt, args...) \
866 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
869 * ata_eh_info helpers
871 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
872 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
873 ATA_EH_DESC_LEN - (ehi)->desc_len, \
877 #define ata_ehi_clear_desc(ehi) do { \
878 (ehi)->desc[0] = '\0'; \
879 (ehi)->desc_len = 0; \
882 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
884 if (ehi->flags & ATA_EHI_HOTPLUGGED)
887 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
888 ehi->hotplug_timestamp = jiffies;
890 ehi->action |= ATA_EH_SOFTRESET;
891 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
894 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
896 __ata_ehi_hotplugged(ehi);
897 ehi->err_mask |= AC_ERR_ATA_BUS;
904 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
906 if (sg == &qc->pad_sgent)
910 if (((sg - qc->__sg) + 1) == qc->n_elem)
915 static inline struct scatterlist *
916 ata_qc_first_sg(struct ata_queued_cmd *qc)
921 return &qc->pad_sgent;
925 static inline struct scatterlist *
926 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
928 if (sg == &qc->pad_sgent)
930 if (++sg - qc->__sg < qc->n_elem)
933 return &qc->pad_sgent;
937 #define ata_for_each_sg(sg, qc) \
938 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
940 static inline unsigned int ata_tag_valid(unsigned int tag)
942 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
945 static inline unsigned int ata_tag_internal(unsigned int tag)
947 return tag == ATA_MAX_QUEUE - 1;
953 static inline unsigned int ata_class_enabled(unsigned int class)
955 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
958 static inline unsigned int ata_class_disabled(unsigned int class)
960 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
963 static inline unsigned int ata_class_absent(unsigned int class)
965 return !ata_class_enabled(class) && !ata_class_disabled(class);
968 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
970 return ata_class_enabled(dev->class);
973 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
975 return ata_class_disabled(dev->class);
978 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
980 return ata_class_absent(dev->class);
983 static inline unsigned int ata_dev_ready(const struct ata_device *dev)
985 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
991 static inline int ata_port_max_devices(const struct ata_port *ap)
993 if (ap->flags & ATA_FLAG_SLAVE_POSS)
999 static inline u8 ata_chk_status(struct ata_port *ap)
1001 return ap->ops->check_status(ap);
1006 * ata_pause - Flush writes and pause 400 nanoseconds.
1007 * @ap: Port to wait for.
1010 * Inherited from caller.
1013 static inline void ata_pause(struct ata_port *ap)
1021 * ata_busy_wait - Wait for a port status register
1022 * @ap: Port to wait for.
1024 * Waits up to max*10 microseconds for the selected bits in the port's
1025 * status register to be cleared.
1026 * Returns final value of status register.
1029 * Inherited from caller.
1032 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1039 status = ata_chk_status(ap);
1041 } while ((status & bits) && (max > 0));
1048 * ata_wait_idle - Wait for a port to be idle.
1049 * @ap: Port to wait for.
1051 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1052 * Returns final value of status register.
1055 * Inherited from caller.
1058 static inline u8 ata_wait_idle(struct ata_port *ap)
1060 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1062 if (status & (ATA_BUSY | ATA_DRQ)) {
1063 unsigned long l = ap->ioaddr.status_addr;
1064 if (ata_msg_warn(ap))
1065 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
1072 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1074 qc->tf.ctl |= ATA_NIEN;
1077 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1080 if (likely(ata_tag_valid(tag)))
1081 return &ap->qcmd[tag];
1085 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1088 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1090 if (unlikely(!qc) || !ap->ops->error_handler)
1093 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1094 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1100 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1102 memset(tf, 0, sizeof(*tf));
1104 tf->ctl = dev->ap->ctl;
1105 if (dev->devno == 0)
1106 tf->device = ATA_DEVICE_OBS;
1108 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1111 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1115 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1117 qc->nbytes = qc->curbytes = 0;
1120 ata_tf_init(qc->dev, &qc->tf);
1122 /* init result_tf such that it indicates normal completion */
1123 qc->result_tf.command = ATA_DRDY;
1124 qc->result_tf.feature = 0;
1128 * ata_irq_on - Enable interrupts on a port.
1129 * @ap: Port on which interrupts are enabled.
1131 * Enable interrupts on a legacy IDE device using MMIO or PIO,
1132 * wait for idle, clear any pending interrupts.
1135 * Inherited from caller.
1138 static inline u8 ata_irq_on(struct ata_port *ap)
1140 struct ata_ioports *ioaddr = &ap->ioaddr;
1143 ap->ctl &= ~ATA_NIEN;
1144 ap->last_ctl = ap->ctl;
1146 if (ap->flags & ATA_FLAG_MMIO)
1147 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
1149 outb(ap->ctl, ioaddr->ctl_addr);
1150 tmp = ata_wait_idle(ap);
1152 ap->ops->irq_clear(ap);
1159 * ata_irq_ack - Acknowledge a device interrupt.
1160 * @ap: Port on which interrupts are enabled.
1162 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1163 * or BUSY+DRQ clear). Obtain dma status and port status from
1164 * device. Clear the interrupt. Return port status.
1169 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1171 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1172 u8 host_stat, post_stat, status;
1174 status = ata_busy_wait(ap, bits, 1000);
1176 if (ata_msg_err(ap))
1177 printk(KERN_ERR "abnormal status 0x%X\n", status);
1179 /* get controller status; clear intr, err bits */
1180 if (ap->flags & ATA_FLAG_MMIO) {
1181 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1182 host_stat = readb(mmio + ATA_DMA_STATUS);
1183 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1184 mmio + ATA_DMA_STATUS);
1186 post_stat = readb(mmio + ATA_DMA_STATUS);
1188 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1189 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1190 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1192 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1195 if (ata_msg_intr(ap))
1196 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1198 host_stat, post_stat, status);
1203 static inline int ata_try_flush_cache(const struct ata_device *dev)
1205 return ata_id_wcache_enabled(dev->id) ||
1206 ata_id_has_flush(dev->id) ||
1207 ata_id_has_flush_ext(dev->id);
1210 static inline unsigned int ac_err_mask(u8 status)
1212 if (status & (ATA_BUSY | ATA_DRQ))
1214 if (status & (ATA_ERR | ATA_DF))
1219 static inline unsigned int __ac_err_mask(u8 status)
1221 unsigned int mask = ac_err_mask(status);
1223 return AC_ERR_OTHER;
1227 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1230 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1231 &ap->pad_dma, GFP_KERNEL);
1232 return (ap->pad == NULL) ? -ENOMEM : 0;
1235 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1237 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1240 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1242 return (struct ata_port *) &host->hostdata[0];
1245 #endif /* __LINUX_LIBATA_H__ */