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>
40 * Define if arch has non-standard setup. This is a _PCI_ standard
41 * not a legacy or ISA standard.
43 #ifdef CONFIG_ATA_NONSTANDARD
44 #include <asm/libata-portmap.h>
46 #include <asm-generic/libata-portmap.h>
50 * compile-time options: to be removed as soon as all the drivers are
51 * converted to the new debugging mechanism
53 #undef ATA_DEBUG /* debugging output */
54 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
55 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
56 #undef ATA_NDEBUG /* define to disable quick runtime checks */
57 #define ATA_ENABLE_PATA /* define to enable PATA support in some
58 * low-level drivers */
61 /* note: prints function name for you */
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
67 #define VPRINTK(fmt, args...)
68 #endif /* ATA_VERBOSE_DEBUG */
70 #define DPRINTK(fmt, args...)
71 #define VPRINTK(fmt, args...)
72 #endif /* ATA_DEBUG */
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
86 ATA_MSG_INTR = 0x0040,
90 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
99 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
105 return (1 << dval) - 1;
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
111 /* move to PCI layer? */
112 #define PCI_VDEVICE(vendor, device) \
113 PCI_VENDOR_ID_##vendor, (device), \
114 PCI_ANY_ID, PCI_ANY_ID, 0, 0
116 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
122 /* various global constants */
123 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
126 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
128 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
130 ATA_DEF_BUSY_WAIT = 10000,
131 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
133 ATA_SHT_EMULATED = 1,
134 ATA_SHT_CMD_PER_LUN = 1,
135 ATA_SHT_THIS_ID = -1,
136 ATA_SHT_USE_CLUSTERING = 1,
138 /* struct ata_device stuff */
139 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
140 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
141 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
142 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
143 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
144 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
146 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
147 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
148 ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */
149 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
151 ATA_DFLAG_DETACH = (1 << 16),
152 ATA_DFLAG_DETACHED = (1 << 17),
154 ATA_DEV_UNKNOWN = 0, /* unknown device */
155 ATA_DEV_ATA = 1, /* ATA device */
156 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
157 ATA_DEV_ATAPI = 3, /* ATAPI device */
158 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
159 ATA_DEV_NONE = 5, /* no device */
161 /* struct ata_port flags */
162 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
163 /* (doesn't imply presence) */
164 ATA_FLAG_SATA = (1 << 1),
165 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
166 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
167 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
168 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
169 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
170 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
171 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
172 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
173 * doesn't handle PIO interrupts */
174 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
175 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
176 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
177 * Register FIS clearing BSY */
178 ATA_FLAG_DEBUGMSG = (1 << 13),
179 ATA_FLAG_DETECT_POLLING = (1 << 14), /* detect device presence by
180 * polling IDENTIFY */
181 ATA_FLAG_SETXFER_POLLING= (1 << 15), /* use polling for SETXFER */
183 /* The following flag belongs to ap->pflags but is kept in
184 * ap->flags because it's referenced in many LLDs and will be
185 * removed in not-too-distant future.
187 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
189 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
191 /* struct ata_port pflags */
192 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
193 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
194 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
195 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
196 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
197 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
198 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
200 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
201 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
202 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
204 /* struct ata_queued_cmd flags */
205 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
206 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
207 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
208 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
209 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
210 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
212 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
213 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
214 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
217 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
219 /* various lengths of time */
220 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
221 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
222 ATA_TMOUT_INTERNAL = 30 * HZ,
223 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
237 /* SATA port states */
242 /* encoding various smaller bitmaps into a single
243 * unsigned int bitmap
250 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
251 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
253 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
254 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
255 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
257 /* size of buffer to pad xfers ending on unaligned boundaries */
259 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
261 /* masks for port functions */
262 ATA_PORT_PRIMARY = (1 << 0),
263 ATA_PORT_SECONDARY = (1 << 1),
268 /* desc_len for ata_eh_info and context */
269 ATA_EH_DESC_LEN = 80,
271 /* reset / recovery action types */
272 ATA_EH_REVALIDATE = (1 << 0),
273 ATA_EH_SOFTRESET = (1 << 1),
274 ATA_EH_HARDRESET = (1 << 2),
275 ATA_EH_SUSPEND = (1 << 3),
276 ATA_EH_RESUME = (1 << 4),
277 ATA_EH_PM_FREEZE = (1 << 5),
279 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
280 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
281 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
283 /* ata_eh_info->flags */
284 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
285 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
286 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
287 ATA_EHI_QUIET = (1 << 3), /* be quiet */
289 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
290 ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */
291 ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */
292 ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */
294 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
296 /* max repeat if error condition is still set after ->error_handler */
297 ATA_EH_MAX_REPEAT = 5,
299 /* how hard are we gonna try to probe/recover devices */
300 ATA_PROBE_MAX_TRIES = 3,
301 ATA_EH_RESET_TRIES = 3,
302 ATA_EH_DEV_TRIES = 3,
304 /* Drive spinup time (time from power-on to the first D2H FIS)
305 * in msecs - 8s currently. Failing to get ready in this time
306 * isn't critical. It will result in reset failure for
307 * controllers which can't wait for the first D2H FIS. libata
308 * will retry, so it just has to be long enough to spin up
311 ATA_SPINUP_WAIT = 8000,
313 /* Horkage types. May be set by libata or controller on drives
314 (some horkage may be drive/controller pair dependant */
316 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
317 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
318 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
321 enum hsm_task_states {
322 HSM_ST_IDLE, /* no command on going */
323 HSM_ST, /* (waiting the device to) transfer data */
324 HSM_ST_LAST, /* (waiting the device to) complete command */
325 HSM_ST_ERR, /* error */
326 HSM_ST_FIRST, /* (waiting the device to)
327 write CDB or first data block */
330 enum ata_completion_errors {
331 AC_ERR_DEV = (1 << 0), /* device reported error */
332 AC_ERR_HSM = (1 << 1), /* host state machine violation */
333 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
334 AC_ERR_MEDIA = (1 << 3), /* media error */
335 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
336 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
337 AC_ERR_SYSTEM = (1 << 6), /* system error */
338 AC_ERR_INVALID = (1 << 7), /* invalid argument */
339 AC_ERR_OTHER = (1 << 8), /* unknown */
340 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
343 /* forward declarations */
345 struct ata_port_operations;
347 struct ata_queued_cmd;
350 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
351 typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
352 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
353 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
356 unsigned long cmd_addr;
357 unsigned long data_addr;
358 unsigned long error_addr;
359 unsigned long feature_addr;
360 unsigned long nsect_addr;
361 unsigned long lbal_addr;
362 unsigned long lbam_addr;
363 unsigned long lbah_addr;
364 unsigned long device_addr;
365 unsigned long status_addr;
366 unsigned long command_addr;
367 unsigned long altstatus_addr;
368 unsigned long ctl_addr;
369 unsigned long bmdma_addr;
370 unsigned long scr_addr;
373 struct ata_probe_ent {
374 struct list_head node;
376 const struct ata_port_operations *port_ops;
377 struct scsi_host_template *sht;
378 struct ata_ioports port[ATA_MAX_PORTS];
379 unsigned int n_ports;
380 unsigned int dummy_port_mask;
381 unsigned int pio_mask;
382 unsigned int mwdma_mask;
383 unsigned int udma_mask;
386 unsigned int irq_flags;
387 unsigned long port_flags;
388 unsigned long _host_flags;
389 void __iomem *mmio_base;
392 /* port_info for the secondary port. Together with irq2, it's
393 * used to implement non-uniform secondary port. Currently,
394 * the only user is ata_piix combined mode. This workaround
395 * will be removed together with ata_probe_ent when init model
398 const struct ata_port_info *pinfo2;
406 void __iomem *mmio_base;
407 unsigned int n_ports;
409 const struct ata_port_operations *ops;
411 int simplex_claimed; /* Keep seperate in case we
412 ever need to do this locked */
413 struct ata_port *ports[0];
416 struct ata_queued_cmd {
418 struct ata_device *dev;
420 struct scsi_cmnd *scsicmd;
421 void (*scsidone)(struct scsi_cmnd *);
423 struct ata_taskfile tf;
424 u8 cdb[ATAPI_CDB_LEN];
426 unsigned long flags; /* ATA_QCFLAG_xxx */
429 unsigned int orig_n_elem;
433 unsigned int pad_len;
436 unsigned int cursect;
439 unsigned int curbytes;
442 unsigned int cursg_ofs;
444 struct scatterlist sgent;
445 struct scatterlist pad_sgent;
448 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
449 struct scatterlist *__sg;
451 unsigned int err_mask;
452 struct ata_taskfile result_tf;
453 ata_qc_cb_t complete_fn;
458 struct ata_port_stats {
459 unsigned long unhandled_irq;
460 unsigned long idle_irq;
461 unsigned long rw_reqbuf;
464 struct ata_ering_entry {
466 unsigned int err_mask;
472 struct ata_ering_entry ring[ATA_ERING_SIZE];
477 unsigned int devno; /* 0 or 1 */
478 unsigned long flags; /* ATA_DFLAG_xxx */
479 struct scsi_device *sdev; /* attached SCSI device */
480 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
481 u64 n_sectors; /* size of device, if ATA */
482 unsigned int class; /* ATA_DEV_xxx */
483 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
487 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
489 unsigned int multi_count; /* sectors count for
490 READ/WRITE MULTIPLE */
491 unsigned int max_sectors; /* per-device max sectors */
492 unsigned int cdb_len;
494 /* per-dev xfer mask */
495 unsigned int pio_mask;
496 unsigned int mwdma_mask;
497 unsigned int udma_mask;
499 /* for CHS addressing */
500 u16 cylinders; /* Number of cylinders */
501 u16 heads; /* Number of heads */
502 u16 sectors; /* Number of sectors per track */
505 struct ata_ering ering;
506 unsigned int horkage; /* List of broken features */
509 /* Offset into struct ata_device. Fields above it are maintained
510 * acress device init. Fields below are zeroed.
512 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
515 struct ata_device *dev; /* offending device */
516 u32 serror; /* SError from LLDD */
517 unsigned int err_mask; /* port-wide err_mask */
518 unsigned int action; /* ATA_EH_* action mask */
519 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
520 unsigned int flags; /* ATA_EHI_* flags */
522 unsigned long hotplug_timestamp;
523 unsigned int probe_mask;
525 char desc[ATA_EH_DESC_LEN];
529 struct ata_eh_context {
530 struct ata_eh_info i;
531 int tries[ATA_MAX_DEVICES];
532 unsigned int classes[ATA_MAX_DEVICES];
533 unsigned int did_probe_mask;
537 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
538 const struct ata_port_operations *ops;
540 unsigned long flags; /* ATA_FLAG_xxx */
541 unsigned int pflags; /* ATA_PFLAG_xxx */
542 unsigned int id; /* unique id req'd by scsi midlyr */
543 unsigned int port_no; /* unique port #; from zero */
545 struct ata_prd *prd; /* our SG list */
546 dma_addr_t prd_dma; /* and its DMA mapping */
548 void *pad; /* array of DMA pad buffers */
551 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
553 u8 ctl; /* cache of ATA control register */
554 u8 last_ctl; /* Cache last written value */
555 unsigned int pio_mask;
556 unsigned int mwdma_mask;
557 unsigned int udma_mask;
558 unsigned int cbl; /* cable type; ATA_CBL_xxx */
559 unsigned int hw_sata_spd_limit;
560 unsigned int sata_spd_limit; /* SATA PHY speed limit */
562 /* record runtime error info, protected by host lock */
563 struct ata_eh_info eh_info;
564 /* EH context owned by EH */
565 struct ata_eh_context eh_context;
567 struct ata_device device[ATA_MAX_DEVICES];
569 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
570 unsigned long qc_allocated;
571 unsigned int qc_active;
573 unsigned int active_tag;
576 struct ata_port_stats stats;
577 struct ata_host *host;
580 struct work_struct port_task;
581 struct work_struct hotplug_task;
582 struct work_struct scsi_rescan_task;
584 unsigned int hsm_task_state;
587 struct list_head eh_done_q;
588 wait_queue_head_t eh_wait_q;
590 pm_message_t pm_mesg;
595 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
598 struct ata_port_operations {
599 void (*port_disable) (struct ata_port *);
601 void (*dev_config) (struct ata_port *, struct ata_device *);
603 void (*set_piomode) (struct ata_port *, struct ata_device *);
604 void (*set_dmamode) (struct ata_port *, struct ata_device *);
605 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
607 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
608 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
610 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
611 u8 (*check_status)(struct ata_port *ap);
612 u8 (*check_altstatus)(struct ata_port *ap);
613 void (*dev_select)(struct ata_port *ap, unsigned int device);
615 void (*phy_reset) (struct ata_port *ap); /* obsolete */
616 void (*set_mode) (struct ata_port *ap);
618 void (*post_set_mode) (struct ata_port *ap);
620 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
622 void (*bmdma_setup) (struct ata_queued_cmd *qc);
623 void (*bmdma_start) (struct ata_queued_cmd *qc);
625 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
627 void (*qc_prep) (struct ata_queued_cmd *qc);
628 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
630 /* Error handlers. ->error_handler overrides ->eng_timeout and
631 * indicates that new-style EH is in place.
633 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
635 void (*freeze) (struct ata_port *ap);
636 void (*thaw) (struct ata_port *ap);
637 void (*error_handler) (struct ata_port *ap);
638 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
640 irq_handler_t irq_handler;
641 void (*irq_clear) (struct ata_port *);
643 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
644 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
647 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
648 int (*port_resume) (struct ata_port *ap);
650 int (*port_start) (struct ata_port *ap);
651 void (*port_stop) (struct ata_port *ap);
653 void (*host_stop) (struct ata_host *host);
655 void (*bmdma_stop) (struct ata_queued_cmd *qc);
656 u8 (*bmdma_status) (struct ata_port *ap);
659 struct ata_port_info {
660 struct scsi_host_template *sht;
662 unsigned long pio_mask;
663 unsigned long mwdma_mask;
664 unsigned long udma_mask;
665 const struct ata_port_operations *port_ops;
670 unsigned short mode; /* ATA mode */
671 unsigned short setup; /* t1 */
672 unsigned short act8b; /* t2 for 8-bit I/O */
673 unsigned short rec8b; /* t2i for 8-bit I/O */
674 unsigned short cyc8b; /* t0 for 8-bit I/O */
675 unsigned short active; /* t2 or tD */
676 unsigned short recover; /* t2i or tK */
677 unsigned short cycle; /* t0 */
678 unsigned short udma; /* t2CYCTYP/2 */
681 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
683 extern const unsigned long sata_deb_timing_normal[];
684 extern const unsigned long sata_deb_timing_hotplug[];
685 extern const unsigned long sata_deb_timing_long[];
687 extern const struct ata_port_operations ata_dummy_port_ops;
689 static inline const unsigned long *
690 sata_ehc_deb_timing(struct ata_eh_context *ehc)
692 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
693 return sata_deb_timing_hotplug;
695 return sata_deb_timing_normal;
698 static inline int ata_port_is_dummy(struct ata_port *ap)
700 return ap->ops == &ata_dummy_port_ops;
703 extern void ata_port_probe(struct ata_port *);
704 extern void __sata_phy_reset(struct ata_port *ap);
705 extern void sata_phy_reset(struct ata_port *ap);
706 extern void ata_bus_reset(struct ata_port *ap);
707 extern int sata_set_spd(struct ata_port *ap);
708 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
709 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
710 extern int ata_std_prereset(struct ata_port *ap);
711 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
712 extern int sata_port_hardreset(struct ata_port *ap,
713 const unsigned long *timing);
714 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
715 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
716 extern void ata_port_disable(struct ata_port *);
717 extern void ata_std_ports(struct ata_ioports *ioaddr);
719 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
720 unsigned int n_ports);
721 extern void ata_pci_remove_one (struct pci_dev *pdev);
722 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
723 extern void ata_pci_device_do_resume(struct pci_dev *pdev);
724 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
725 extern int ata_pci_device_resume(struct pci_dev *pdev);
726 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
727 #endif /* CONFIG_PCI */
728 extern int ata_device_add(const struct ata_probe_ent *ent);
729 extern void ata_port_detach(struct ata_port *ap);
730 extern void ata_host_init(struct ata_host *, struct device *,
731 unsigned long, const struct ata_port_operations *);
732 extern void ata_host_remove(struct ata_host *host);
733 extern int ata_scsi_detect(struct scsi_host_template *sht);
734 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
735 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
736 extern int ata_scsi_release(struct Scsi_Host *host);
737 extern void ata_sas_port_destroy(struct ata_port *);
738 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
739 struct ata_port_info *, struct Scsi_Host *);
740 extern int ata_sas_port_init(struct ata_port *);
741 extern int ata_sas_port_start(struct ata_port *ap);
742 extern void ata_sas_port_stop(struct ata_port *ap);
743 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
744 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
745 struct ata_port *ap);
746 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
747 extern int sata_scr_valid(struct ata_port *ap);
748 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
749 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
750 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
751 extern int ata_port_online(struct ata_port *ap);
752 extern int ata_port_offline(struct ata_port *ap);
753 extern int ata_scsi_device_resume(struct scsi_device *);
754 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
755 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
756 extern void ata_host_resume(struct ata_host *host);
757 extern int ata_ratelimit(void);
758 extern int ata_busy_sleep(struct ata_port *ap,
759 unsigned long timeout_pat, unsigned long timeout);
760 extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
761 void *data, unsigned long delay);
762 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
763 unsigned long interval_msec,
764 unsigned long timeout_msec);
767 * Default driver ops implementations
769 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
770 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
771 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
772 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
773 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
774 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
775 extern u8 ata_check_status(struct ata_port *ap);
776 extern u8 ata_altstatus(struct ata_port *ap);
777 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
778 extern int ata_port_start (struct ata_port *ap);
779 extern void ata_port_stop (struct ata_port *ap);
780 extern void ata_host_stop (struct ata_host *host);
781 extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
782 extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
783 unsigned int buflen, int write_data);
784 extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
785 unsigned int buflen, int write_data);
786 extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
787 unsigned int buflen, int write_data);
788 extern void ata_qc_prep(struct ata_queued_cmd *qc);
789 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
790 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
791 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
792 unsigned int buflen);
793 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
794 unsigned int n_elem);
795 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
796 extern void ata_id_string(const u16 *id, unsigned char *s,
797 unsigned int ofs, unsigned int len);
798 extern void ata_id_c_string(const u16 *id, unsigned char *s,
799 unsigned int ofs, unsigned int len);
800 extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
801 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
802 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
803 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
804 extern u8 ata_bmdma_status(struct ata_port *ap);
805 extern void ata_bmdma_irq_clear(struct ata_port *ap);
806 extern void ata_bmdma_freeze(struct ata_port *ap);
807 extern void ata_bmdma_thaw(struct ata_port *ap);
808 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
809 ata_reset_fn_t softreset,
810 ata_reset_fn_t hardreset,
811 ata_postreset_fn_t postreset);
812 extern void ata_bmdma_error_handler(struct ata_port *ap);
813 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
814 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
815 u8 status, int in_wq);
816 extern void ata_qc_complete(struct ata_queued_cmd *qc);
817 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
818 void (*finish_qc)(struct ata_queued_cmd *));
819 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
820 void (*done)(struct scsi_cmnd *));
821 extern int ata_std_bios_param(struct scsi_device *sdev,
822 struct block_device *bdev,
823 sector_t capacity, int geom[]);
824 extern int ata_scsi_slave_config(struct scsi_device *sdev);
825 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
826 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
828 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
834 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
835 extern int ata_timing_compute(struct ata_device *, unsigned short,
836 struct ata_timing *, int, int);
837 extern void ata_timing_merge(const struct ata_timing *,
838 const struct ata_timing *, struct ata_timing *,
842 ATA_TIMING_SETUP = (1 << 0),
843 ATA_TIMING_ACT8B = (1 << 1),
844 ATA_TIMING_REC8B = (1 << 2),
845 ATA_TIMING_CYC8B = (1 << 3),
846 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
848 ATA_TIMING_ACTIVE = (1 << 4),
849 ATA_TIMING_RECOVER = (1 << 5),
850 ATA_TIMING_CYCLE = (1 << 6),
851 ATA_TIMING_UDMA = (1 << 7),
852 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
853 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
854 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
855 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
861 unsigned int reg; /* PCI config register to read */
862 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
867 extern void ata_pci_host_stop (struct ata_host *host);
868 extern struct ata_probe_ent *
869 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
870 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
871 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
872 #endif /* CONFIG_PCI */
877 extern void ata_eng_timeout(struct ata_port *ap);
879 extern void ata_port_schedule_eh(struct ata_port *ap);
880 extern int ata_port_abort(struct ata_port *ap);
881 extern int ata_port_freeze(struct ata_port *ap);
883 extern void ata_eh_freeze_port(struct ata_port *ap);
884 extern void ata_eh_thaw_port(struct ata_port *ap);
886 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
887 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
889 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
890 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
891 ata_postreset_fn_t postreset);
896 #define ata_port_printk(ap, lv, fmt, args...) \
897 printk(lv"ata%u: "fmt, (ap)->id , ##args)
899 #define ata_dev_printk(dev, lv, fmt, args...) \
900 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
903 * ata_eh_info helpers
905 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
906 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
907 ATA_EH_DESC_LEN - (ehi)->desc_len, \
911 #define ata_ehi_clear_desc(ehi) do { \
912 (ehi)->desc[0] = '\0'; \
913 (ehi)->desc_len = 0; \
916 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
918 if (ehi->flags & ATA_EHI_HOTPLUGGED)
921 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
922 ehi->hotplug_timestamp = jiffies;
924 ehi->action |= ATA_EH_SOFTRESET;
925 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
928 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
930 __ata_ehi_hotplugged(ehi);
931 ehi->err_mask |= AC_ERR_ATA_BUS;
938 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
940 if (sg == &qc->pad_sgent)
944 if (((sg - qc->__sg) + 1) == qc->n_elem)
949 static inline struct scatterlist *
950 ata_qc_first_sg(struct ata_queued_cmd *qc)
955 return &qc->pad_sgent;
959 static inline struct scatterlist *
960 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
962 if (sg == &qc->pad_sgent)
964 if (++sg - qc->__sg < qc->n_elem)
967 return &qc->pad_sgent;
971 #define ata_for_each_sg(sg, qc) \
972 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
974 static inline unsigned int ata_tag_valid(unsigned int tag)
976 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
979 static inline unsigned int ata_tag_internal(unsigned int tag)
981 return tag == ATA_MAX_QUEUE - 1;
987 static inline unsigned int ata_class_enabled(unsigned int class)
989 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
992 static inline unsigned int ata_class_disabled(unsigned int class)
994 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
997 static inline unsigned int ata_class_absent(unsigned int class)
999 return !ata_class_enabled(class) && !ata_class_disabled(class);
1002 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1004 return ata_class_enabled(dev->class);
1007 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1009 return ata_class_disabled(dev->class);
1012 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1014 return ata_class_absent(dev->class);
1017 static inline unsigned int ata_dev_ready(const struct ata_device *dev)
1019 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
1025 static inline int ata_port_max_devices(const struct ata_port *ap)
1027 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1033 static inline u8 ata_chk_status(struct ata_port *ap)
1035 return ap->ops->check_status(ap);
1040 * ata_pause - Flush writes and pause 400 nanoseconds.
1041 * @ap: Port to wait for.
1044 * Inherited from caller.
1047 static inline void ata_pause(struct ata_port *ap)
1055 * ata_busy_wait - Wait for a port status register
1056 * @ap: Port to wait for.
1058 * Waits up to max*10 microseconds for the selected bits in the port's
1059 * status register to be cleared.
1060 * Returns final value of status register.
1063 * Inherited from caller.
1066 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1073 status = ata_chk_status(ap);
1075 } while (status != 0xff && (status & bits) && (max > 0));
1082 * ata_wait_idle - Wait for a port to be idle.
1083 * @ap: Port to wait for.
1085 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1086 * Returns final value of status register.
1089 * Inherited from caller.
1092 static inline u8 ata_wait_idle(struct ata_port *ap)
1094 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1096 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
1097 unsigned long l = ap->ioaddr.status_addr;
1098 if (ata_msg_warn(ap))
1099 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
1106 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1108 qc->tf.ctl |= ATA_NIEN;
1111 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1114 if (likely(ata_tag_valid(tag)))
1115 return &ap->qcmd[tag];
1119 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1122 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1124 if (unlikely(!qc) || !ap->ops->error_handler)
1127 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1128 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1134 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1136 memset(tf, 0, sizeof(*tf));
1138 tf->ctl = dev->ap->ctl;
1139 if (dev->devno == 0)
1140 tf->device = ATA_DEVICE_OBS;
1142 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1145 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1149 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1151 qc->nbytes = qc->curbytes = 0;
1154 ata_tf_init(qc->dev, &qc->tf);
1156 /* init result_tf such that it indicates normal completion */
1157 qc->result_tf.command = ATA_DRDY;
1158 qc->result_tf.feature = 0;
1162 * ata_irq_ack - Acknowledge a device interrupt.
1163 * @ap: Port on which interrupts are enabled.
1165 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1166 * or BUSY+DRQ clear). Obtain dma status and port status from
1167 * device. Clear the interrupt. Return port status.
1172 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1174 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1175 u8 host_stat, post_stat, status;
1177 status = ata_busy_wait(ap, bits, 1000);
1179 if (ata_msg_err(ap))
1180 printk(KERN_ERR "abnormal status 0x%X\n", status);
1182 /* get controller status; clear intr, err bits */
1183 if (ap->flags & ATA_FLAG_MMIO) {
1184 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1185 host_stat = readb(mmio + ATA_DMA_STATUS);
1186 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1187 mmio + ATA_DMA_STATUS);
1189 post_stat = readb(mmio + ATA_DMA_STATUS);
1191 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1192 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1193 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1195 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1198 if (ata_msg_intr(ap))
1199 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1201 host_stat, post_stat, status);
1206 static inline int ata_try_flush_cache(const struct ata_device *dev)
1208 return ata_id_wcache_enabled(dev->id) ||
1209 ata_id_has_flush(dev->id) ||
1210 ata_id_has_flush_ext(dev->id);
1213 static inline unsigned int ac_err_mask(u8 status)
1215 if (status & (ATA_BUSY | ATA_DRQ))
1217 if (status & (ATA_ERR | ATA_DF))
1222 static inline unsigned int __ac_err_mask(u8 status)
1224 unsigned int mask = ac_err_mask(status);
1226 return AC_ERR_OTHER;
1230 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1233 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1234 &ap->pad_dma, GFP_KERNEL);
1235 return (ap->pad == NULL) ? -ENOMEM : 0;
1238 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1240 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1243 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1245 return (struct ata_port *) &host->hostdata[0];
1248 #endif /* __LINUX_LIBATA_H__ */