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 */
59 /* note: prints function name for you */
61 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
62 #ifdef ATA_VERBOSE_DEBUG
63 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65 #define VPRINTK(fmt, args...)
66 #endif /* ATA_VERBOSE_DEBUG */
68 #define DPRINTK(fmt, args...)
69 #define VPRINTK(fmt, args...)
70 #endif /* ATA_DEBUG */
72 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
74 /* NEW: debug levels */
75 #define HAVE_LIBATA_MSG 1
79 ATA_MSG_INFO = 0x0002,
80 ATA_MSG_PROBE = 0x0004,
81 ATA_MSG_WARN = 0x0008,
82 ATA_MSG_MALLOC = 0x0010,
84 ATA_MSG_INTR = 0x0040,
88 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
89 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
90 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
91 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
92 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
93 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
94 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
95 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
97 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
99 if (dval < 0 || dval >= (sizeof(u32) * 8))
100 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 return (1 << dval) - 1;
106 /* defines only for the constants which don't work well as enums */
107 #define ATA_TAG_POISON 0xfafbfcfdU
109 /* move to PCI layer? */
110 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
116 /* various global constants */
117 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
120 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
122 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
124 ATA_DEF_BUSY_WAIT = 10000,
125 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
127 ATA_SHT_EMULATED = 1,
128 ATA_SHT_CMD_PER_LUN = 1,
129 ATA_SHT_THIS_ID = -1,
130 ATA_SHT_USE_CLUSTERING = 1,
132 /* struct ata_device stuff */
133 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
134 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
135 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
136 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
137 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
138 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
140 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
141 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
142 ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */
143 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
145 ATA_DFLAG_DETACH = (1 << 16),
146 ATA_DFLAG_DETACHED = (1 << 17),
148 ATA_DEV_UNKNOWN = 0, /* unknown device */
149 ATA_DEV_ATA = 1, /* ATA device */
150 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
151 ATA_DEV_ATAPI = 3, /* ATAPI device */
152 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
153 ATA_DEV_NONE = 5, /* no device */
155 /* struct ata_port flags */
156 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
157 /* (doesn't imply presence) */
158 ATA_FLAG_SATA = (1 << 1),
159 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
160 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
161 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
162 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
163 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
164 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
165 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
166 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
167 * doesn't handle PIO interrupts */
168 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
169 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
170 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
171 * Register FIS clearing BSY */
172 ATA_FLAG_DEBUGMSG = (1 << 13),
173 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
174 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
176 /* The following flag belongs to ap->pflags but is kept in
177 * ap->flags because it's referenced in many LLDs and will be
178 * removed in not-too-distant future.
180 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
182 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
184 /* struct ata_port pflags */
185 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
186 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
187 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
188 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
189 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
190 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
191 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
193 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
194 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
195 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
197 /* struct ata_queued_cmd flags */
198 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
199 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
200 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
201 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
202 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
203 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
205 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
206 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
207 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
210 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
212 /* various lengths of time */
213 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
214 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
215 ATA_TMOUT_INTERNAL = 30 * HZ,
216 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
230 /* SATA port states */
235 /* encoding various smaller bitmaps into a single
236 * unsigned int bitmap
243 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
244 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
246 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
247 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
248 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
250 /* size of buffer to pad xfers ending on unaligned boundaries */
252 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
254 /* masks for port functions */
255 ATA_PORT_PRIMARY = (1 << 0),
256 ATA_PORT_SECONDARY = (1 << 1),
261 /* desc_len for ata_eh_info and context */
262 ATA_EH_DESC_LEN = 80,
264 /* reset / recovery action types */
265 ATA_EH_REVALIDATE = (1 << 0),
266 ATA_EH_SOFTRESET = (1 << 1),
267 ATA_EH_HARDRESET = (1 << 2),
268 ATA_EH_SUSPEND = (1 << 3),
269 ATA_EH_RESUME = (1 << 4),
270 ATA_EH_PM_FREEZE = (1 << 5),
272 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
273 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
274 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
276 /* ata_eh_info->flags */
277 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
278 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
279 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
280 ATA_EHI_QUIET = (1 << 3), /* be quiet */
282 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
283 ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */
284 ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */
285 ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */
287 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
289 /* max repeat if error condition is still set after ->error_handler */
290 ATA_EH_MAX_REPEAT = 5,
292 /* how hard are we gonna try to probe/recover devices */
293 ATA_PROBE_MAX_TRIES = 3,
294 ATA_EH_RESET_TRIES = 3,
295 ATA_EH_DEV_TRIES = 3,
297 /* Drive spinup time (time from power-on to the first D2H FIS)
298 * in msecs - 8s currently. Failing to get ready in this time
299 * isn't critical. It will result in reset failure for
300 * controllers which can't wait for the first D2H FIS. libata
301 * will retry, so it just has to be long enough to spin up
304 ATA_SPINUP_WAIT = 8000,
306 /* Horkage types. May be set by libata or controller on drives
307 (some horkage may be drive/controller pair dependant */
309 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
310 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
311 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
314 enum hsm_task_states {
315 HSM_ST_IDLE, /* no command on going */
316 HSM_ST, /* (waiting the device to) transfer data */
317 HSM_ST_LAST, /* (waiting the device to) complete command */
318 HSM_ST_ERR, /* error */
319 HSM_ST_FIRST, /* (waiting the device to)
320 write CDB or first data block */
323 enum ata_completion_errors {
324 AC_ERR_DEV = (1 << 0), /* device reported error */
325 AC_ERR_HSM = (1 << 1), /* host state machine violation */
326 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
327 AC_ERR_MEDIA = (1 << 3), /* media error */
328 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
329 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
330 AC_ERR_SYSTEM = (1 << 6), /* system error */
331 AC_ERR_INVALID = (1 << 7), /* invalid argument */
332 AC_ERR_OTHER = (1 << 8), /* unknown */
333 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
336 /* forward declarations */
338 struct ata_port_operations;
340 struct ata_queued_cmd;
343 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
344 typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
345 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
346 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
349 void __iomem *cmd_addr;
350 void __iomem *data_addr;
351 void __iomem *error_addr;
352 void __iomem *feature_addr;
353 void __iomem *nsect_addr;
354 void __iomem *lbal_addr;
355 void __iomem *lbam_addr;
356 void __iomem *lbah_addr;
357 void __iomem *device_addr;
358 void __iomem *status_addr;
359 void __iomem *command_addr;
360 void __iomem *altstatus_addr;
361 void __iomem *ctl_addr;
362 void __iomem *bmdma_addr;
363 void __iomem *scr_addr;
366 struct ata_probe_ent {
367 struct list_head node;
369 const struct ata_port_operations *port_ops;
370 struct scsi_host_template *sht;
371 struct ata_ioports port[ATA_MAX_PORTS];
372 unsigned int n_ports;
373 unsigned int dummy_port_mask;
374 unsigned int pio_mask;
375 unsigned int mwdma_mask;
376 unsigned int udma_mask;
379 unsigned int irq_flags;
380 unsigned long port_flags;
381 unsigned long _host_flags;
382 void __iomem * const *iomap;
385 /* port_info for the secondary port. Together with irq2, it's
386 * used to implement non-uniform secondary port. Currently,
387 * the only user is ata_piix combined mode. This workaround
388 * will be removed together with ata_probe_ent when init model
391 const struct ata_port_info *pinfo2;
399 void __iomem * const *iomap;
400 unsigned int n_ports;
402 const struct ata_port_operations *ops;
404 int simplex_claimed; /* Keep seperate in case we
405 ever need to do this locked */
406 struct ata_port *ports[0];
409 struct ata_queued_cmd {
411 struct ata_device *dev;
413 struct scsi_cmnd *scsicmd;
414 void (*scsidone)(struct scsi_cmnd *);
416 struct ata_taskfile tf;
417 u8 cdb[ATAPI_CDB_LEN];
419 unsigned long flags; /* ATA_QCFLAG_xxx */
422 unsigned int orig_n_elem;
426 unsigned int pad_len;
429 unsigned int curbytes;
432 unsigned int cursg_ofs;
434 struct scatterlist sgent;
435 struct scatterlist pad_sgent;
438 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
439 struct scatterlist *__sg;
441 unsigned int err_mask;
442 struct ata_taskfile result_tf;
443 ata_qc_cb_t complete_fn;
448 struct ata_port_stats {
449 unsigned long unhandled_irq;
450 unsigned long idle_irq;
451 unsigned long rw_reqbuf;
454 struct ata_ering_entry {
456 unsigned int err_mask;
462 struct ata_ering_entry ring[ATA_ERING_SIZE];
467 unsigned int devno; /* 0 or 1 */
468 unsigned long flags; /* ATA_DFLAG_xxx */
469 struct scsi_device *sdev; /* attached SCSI device */
470 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
471 u64 n_sectors; /* size of device, if ATA */
472 unsigned int class; /* ATA_DEV_xxx */
473 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
477 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
479 unsigned int multi_count; /* sectors count for
480 READ/WRITE MULTIPLE */
481 unsigned int max_sectors; /* per-device max sectors */
482 unsigned int cdb_len;
484 /* per-dev xfer mask */
485 unsigned int pio_mask;
486 unsigned int mwdma_mask;
487 unsigned int udma_mask;
489 /* for CHS addressing */
490 u16 cylinders; /* Number of cylinders */
491 u16 heads; /* Number of heads */
492 u16 sectors; /* Number of sectors per track */
495 struct ata_ering ering;
496 unsigned int horkage; /* List of broken features */
499 /* Offset into struct ata_device. Fields above it are maintained
500 * acress device init. Fields below are zeroed.
502 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
505 struct ata_device *dev; /* offending device */
506 u32 serror; /* SError from LLDD */
507 unsigned int err_mask; /* port-wide err_mask */
508 unsigned int action; /* ATA_EH_* action mask */
509 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
510 unsigned int flags; /* ATA_EHI_* flags */
512 unsigned long hotplug_timestamp;
513 unsigned int probe_mask;
515 char desc[ATA_EH_DESC_LEN];
519 struct ata_eh_context {
520 struct ata_eh_info i;
521 int tries[ATA_MAX_DEVICES];
522 unsigned int classes[ATA_MAX_DEVICES];
523 unsigned int did_probe_mask;
527 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
528 const struct ata_port_operations *ops;
530 unsigned long flags; /* ATA_FLAG_xxx */
531 unsigned int pflags; /* ATA_PFLAG_xxx */
532 unsigned int id; /* unique id req'd by scsi midlyr */
533 unsigned int port_no; /* unique port #; from zero */
535 struct ata_prd *prd; /* our SG list */
536 dma_addr_t prd_dma; /* and its DMA mapping */
538 void *pad; /* array of DMA pad buffers */
541 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
543 u8 ctl; /* cache of ATA control register */
544 u8 last_ctl; /* Cache last written value */
545 unsigned int pio_mask;
546 unsigned int mwdma_mask;
547 unsigned int udma_mask;
548 unsigned int cbl; /* cable type; ATA_CBL_xxx */
549 unsigned int hw_sata_spd_limit;
550 unsigned int sata_spd_limit; /* SATA PHY speed limit */
552 /* record runtime error info, protected by host lock */
553 struct ata_eh_info eh_info;
554 /* EH context owned by EH */
555 struct ata_eh_context eh_context;
557 struct ata_device device[ATA_MAX_DEVICES];
559 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
560 unsigned long qc_allocated;
561 unsigned int qc_active;
563 unsigned int active_tag;
566 struct ata_port_stats stats;
567 struct ata_host *host;
570 void *port_task_data;
571 struct delayed_work port_task;
572 struct delayed_work hotplug_task;
573 struct work_struct scsi_rescan_task;
575 unsigned int hsm_task_state;
578 struct list_head eh_done_q;
579 wait_queue_head_t eh_wait_q;
581 pm_message_t pm_mesg;
586 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
589 struct ata_port_operations {
590 void (*port_disable) (struct ata_port *);
592 void (*dev_config) (struct ata_port *, struct ata_device *);
594 void (*set_piomode) (struct ata_port *, struct ata_device *);
595 void (*set_dmamode) (struct ata_port *, struct ata_device *);
596 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
598 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
599 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
601 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
602 u8 (*check_status)(struct ata_port *ap);
603 u8 (*check_altstatus)(struct ata_port *ap);
604 void (*dev_select)(struct ata_port *ap, unsigned int device);
606 void (*phy_reset) (struct ata_port *ap); /* obsolete */
607 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev);
609 void (*post_set_mode) (struct ata_port *ap);
611 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
613 void (*bmdma_setup) (struct ata_queued_cmd *qc);
614 void (*bmdma_start) (struct ata_queued_cmd *qc);
616 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
618 void (*qc_prep) (struct ata_queued_cmd *qc);
619 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
621 /* Error handlers. ->error_handler overrides ->eng_timeout and
622 * indicates that new-style EH is in place.
624 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
626 void (*freeze) (struct ata_port *ap);
627 void (*thaw) (struct ata_port *ap);
628 void (*error_handler) (struct ata_port *ap);
629 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
631 irq_handler_t irq_handler;
632 void (*irq_clear) (struct ata_port *);
633 u8 (*irq_on) (struct ata_port *);
634 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
636 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
637 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
640 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
641 int (*port_resume) (struct ata_port *ap);
643 int (*port_start) (struct ata_port *ap);
644 void (*port_stop) (struct ata_port *ap);
646 void (*host_stop) (struct ata_host *host);
648 void (*bmdma_stop) (struct ata_queued_cmd *qc);
649 u8 (*bmdma_status) (struct ata_port *ap);
652 struct ata_port_info {
653 struct scsi_host_template *sht;
655 unsigned long pio_mask;
656 unsigned long mwdma_mask;
657 unsigned long udma_mask;
658 const struct ata_port_operations *port_ops;
663 unsigned short mode; /* ATA mode */
664 unsigned short setup; /* t1 */
665 unsigned short act8b; /* t2 for 8-bit I/O */
666 unsigned short rec8b; /* t2i for 8-bit I/O */
667 unsigned short cyc8b; /* t0 for 8-bit I/O */
668 unsigned short active; /* t2 or tD */
669 unsigned short recover; /* t2i or tK */
670 unsigned short cycle; /* t0 */
671 unsigned short udma; /* t2CYCTYP/2 */
674 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
676 extern const unsigned long sata_deb_timing_normal[];
677 extern const unsigned long sata_deb_timing_hotplug[];
678 extern const unsigned long sata_deb_timing_long[];
680 extern const struct ata_port_operations ata_dummy_port_ops;
682 static inline const unsigned long *
683 sata_ehc_deb_timing(struct ata_eh_context *ehc)
685 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
686 return sata_deb_timing_hotplug;
688 return sata_deb_timing_normal;
691 static inline int ata_port_is_dummy(struct ata_port *ap)
693 return ap->ops == &ata_dummy_port_ops;
696 extern void ata_port_probe(struct ata_port *);
697 extern void __sata_phy_reset(struct ata_port *ap);
698 extern void sata_phy_reset(struct ata_port *ap);
699 extern void ata_bus_reset(struct ata_port *ap);
700 extern int sata_set_spd(struct ata_port *ap);
701 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
702 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
703 extern int ata_std_prereset(struct ata_port *ap);
704 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
705 extern int sata_port_hardreset(struct ata_port *ap,
706 const unsigned long *timing);
707 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
708 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
709 extern void ata_port_disable(struct ata_port *);
710 extern void ata_std_ports(struct ata_ioports *ioaddr);
712 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
713 unsigned int n_ports);
714 extern void ata_pci_remove_one (struct pci_dev *pdev);
715 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
716 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
717 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
718 extern int ata_pci_device_resume(struct pci_dev *pdev);
719 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
720 #endif /* CONFIG_PCI */
721 extern int ata_device_add(const struct ata_probe_ent *ent);
722 extern void ata_host_detach(struct ata_host *host);
723 extern void ata_host_init(struct ata_host *, struct device *,
724 unsigned long, const struct ata_port_operations *);
725 extern int ata_scsi_detect(struct scsi_host_template *sht);
726 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
727 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
728 extern void ata_sas_port_destroy(struct ata_port *);
729 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
730 struct ata_port_info *, struct Scsi_Host *);
731 extern int ata_sas_port_init(struct ata_port *);
732 extern int ata_sas_port_start(struct ata_port *ap);
733 extern void ata_sas_port_stop(struct ata_port *ap);
734 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
735 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
736 struct ata_port *ap);
737 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
738 extern int sata_scr_valid(struct ata_port *ap);
739 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
740 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
741 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
742 extern int ata_port_online(struct ata_port *ap);
743 extern int ata_port_offline(struct ata_port *ap);
744 extern int ata_scsi_device_resume(struct scsi_device *);
745 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
746 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
747 extern void ata_host_resume(struct ata_host *host);
748 extern int ata_ratelimit(void);
749 extern int ata_busy_sleep(struct ata_port *ap,
750 unsigned long timeout_pat, unsigned long timeout);
751 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
752 void *data, unsigned long delay);
753 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
754 unsigned long interval_msec,
755 unsigned long timeout_msec);
758 * Default driver ops implementations
760 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
761 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
762 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
763 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
764 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
765 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
766 extern u8 ata_check_status(struct ata_port *ap);
767 extern u8 ata_altstatus(struct ata_port *ap);
768 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
769 extern int ata_port_start (struct ata_port *ap);
770 extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
771 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
772 unsigned int buflen, int write_data);
773 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
774 unsigned int buflen, int write_data);
775 extern void ata_qc_prep(struct ata_queued_cmd *qc);
776 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
777 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
778 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
779 unsigned int buflen);
780 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
781 unsigned int n_elem);
782 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
783 extern void ata_id_string(const u16 *id, unsigned char *s,
784 unsigned int ofs, unsigned int len);
785 extern void ata_id_c_string(const u16 *id, unsigned char *s,
786 unsigned int ofs, unsigned int len);
787 extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
788 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
789 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
790 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
791 extern u8 ata_bmdma_status(struct ata_port *ap);
792 extern void ata_bmdma_irq_clear(struct ata_port *ap);
793 extern void ata_bmdma_freeze(struct ata_port *ap);
794 extern void ata_bmdma_thaw(struct ata_port *ap);
795 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
796 ata_reset_fn_t softreset,
797 ata_reset_fn_t hardreset,
798 ata_postreset_fn_t postreset);
799 extern void ata_bmdma_error_handler(struct ata_port *ap);
800 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
801 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
802 u8 status, int in_wq);
803 extern void ata_qc_complete(struct ata_queued_cmd *qc);
804 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
805 void (*finish_qc)(struct ata_queued_cmd *));
806 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
807 void (*done)(struct scsi_cmnd *));
808 extern int ata_std_bios_param(struct scsi_device *sdev,
809 struct block_device *bdev,
810 sector_t capacity, int geom[]);
811 extern int ata_scsi_slave_config(struct scsi_device *sdev);
812 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
813 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
815 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
816 extern u8 ata_irq_on(struct ata_port *ap);
817 extern u8 ata_dummy_irq_on(struct ata_port *ap);
818 extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
819 extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
825 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
826 extern int ata_timing_compute(struct ata_device *, unsigned short,
827 struct ata_timing *, int, int);
828 extern void ata_timing_merge(const struct ata_timing *,
829 const struct ata_timing *, struct ata_timing *,
833 ATA_TIMING_SETUP = (1 << 0),
834 ATA_TIMING_ACT8B = (1 << 1),
835 ATA_TIMING_REC8B = (1 << 2),
836 ATA_TIMING_CYC8B = (1 << 3),
837 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
839 ATA_TIMING_ACTIVE = (1 << 4),
840 ATA_TIMING_RECOVER = (1 << 5),
841 ATA_TIMING_CYCLE = (1 << 6),
842 ATA_TIMING_UDMA = (1 << 7),
843 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
844 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
845 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
846 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
852 unsigned int reg; /* PCI config register to read */
853 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
858 extern struct ata_probe_ent *
859 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
860 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
861 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
862 #endif /* CONFIG_PCI */
867 extern void ata_eng_timeout(struct ata_port *ap);
869 extern void ata_port_schedule_eh(struct ata_port *ap);
870 extern int ata_port_abort(struct ata_port *ap);
871 extern int ata_port_freeze(struct ata_port *ap);
873 extern void ata_eh_freeze_port(struct ata_port *ap);
874 extern void ata_eh_thaw_port(struct ata_port *ap);
876 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
877 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
879 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
880 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
881 ata_postreset_fn_t postreset);
886 #define ata_port_printk(ap, lv, fmt, args...) \
887 printk(lv"ata%u: "fmt, (ap)->id , ##args)
889 #define ata_dev_printk(dev, lv, fmt, args...) \
890 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
893 * ata_eh_info helpers
895 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
896 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
897 ATA_EH_DESC_LEN - (ehi)->desc_len, \
901 #define ata_ehi_clear_desc(ehi) do { \
902 (ehi)->desc[0] = '\0'; \
903 (ehi)->desc_len = 0; \
906 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
908 if (ehi->flags & ATA_EHI_HOTPLUGGED)
911 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
912 ehi->hotplug_timestamp = jiffies;
914 ehi->action |= ATA_EH_SOFTRESET;
915 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
918 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
920 __ata_ehi_hotplugged(ehi);
921 ehi->err_mask |= AC_ERR_ATA_BUS;
928 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
930 if (sg == &qc->pad_sgent)
934 if (((sg - qc->__sg) + 1) == qc->n_elem)
939 static inline struct scatterlist *
940 ata_qc_first_sg(struct ata_queued_cmd *qc)
945 return &qc->pad_sgent;
949 static inline struct scatterlist *
950 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
952 if (sg == &qc->pad_sgent)
954 if (++sg - qc->__sg < qc->n_elem)
957 return &qc->pad_sgent;
961 #define ata_for_each_sg(sg, qc) \
962 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
964 static inline unsigned int ata_tag_valid(unsigned int tag)
966 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
969 static inline unsigned int ata_tag_internal(unsigned int tag)
971 return tag == ATA_MAX_QUEUE - 1;
977 static inline unsigned int ata_class_enabled(unsigned int class)
979 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
982 static inline unsigned int ata_class_disabled(unsigned int class)
984 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
987 static inline unsigned int ata_class_absent(unsigned int class)
989 return !ata_class_enabled(class) && !ata_class_disabled(class);
992 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
994 return ata_class_enabled(dev->class);
997 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
999 return ata_class_disabled(dev->class);
1002 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1004 return ata_class_absent(dev->class);
1007 static inline unsigned int ata_dev_ready(const struct ata_device *dev)
1009 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
1015 static inline int ata_port_max_devices(const struct ata_port *ap)
1017 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1023 static inline u8 ata_chk_status(struct ata_port *ap)
1025 return ap->ops->check_status(ap);
1030 * ata_pause - Flush writes and pause 400 nanoseconds.
1031 * @ap: Port to wait for.
1034 * Inherited from caller.
1037 static inline void ata_pause(struct ata_port *ap)
1045 * ata_busy_wait - Wait for a port status register
1046 * @ap: Port to wait for.
1047 * @bits: bits that must be clear
1048 * @max: number of 10uS waits to perform
1050 * Waits up to max*10 microseconds for the selected bits in the port's
1051 * status register to be cleared.
1052 * Returns final value of status register.
1055 * Inherited from caller.
1058 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1065 status = ata_chk_status(ap);
1067 } while (status != 0xff && (status & bits) && (max > 0));
1074 * ata_wait_idle - Wait for a port to be idle.
1075 * @ap: Port to wait for.
1077 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1078 * Returns final value of status register.
1081 * Inherited from caller.
1084 static inline u8 ata_wait_idle(struct ata_port *ap)
1086 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1088 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
1089 if (ata_msg_warn(ap))
1090 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n",
1091 status, ap->ioaddr.status_addr);
1097 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1099 qc->tf.ctl |= ATA_NIEN;
1102 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1105 if (likely(ata_tag_valid(tag)))
1106 return &ap->qcmd[tag];
1110 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1113 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1115 if (unlikely(!qc) || !ap->ops->error_handler)
1118 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1119 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1125 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1127 memset(tf, 0, sizeof(*tf));
1129 tf->ctl = dev->ap->ctl;
1130 if (dev->devno == 0)
1131 tf->device = ATA_DEVICE_OBS;
1133 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1136 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1138 qc->dma_dir = DMA_NONE;
1141 qc->cursg = qc->cursg_ofs = 0;
1142 qc->nbytes = qc->curbytes = 0;
1147 ata_tf_init(qc->dev, &qc->tf);
1149 /* init result_tf such that it indicates normal completion */
1150 qc->result_tf.command = ATA_DRDY;
1151 qc->result_tf.feature = 0;
1154 static inline int ata_try_flush_cache(const struct ata_device *dev)
1156 return ata_id_wcache_enabled(dev->id) ||
1157 ata_id_has_flush(dev->id) ||
1158 ata_id_has_flush_ext(dev->id);
1161 static inline unsigned int ac_err_mask(u8 status)
1163 if (status & (ATA_BUSY | ATA_DRQ))
1165 if (status & (ATA_ERR | ATA_DF))
1170 static inline unsigned int __ac_err_mask(u8 status)
1172 unsigned int mask = ac_err_mask(status);
1174 return AC_ERR_OTHER;
1178 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1181 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1182 &ap->pad_dma, GFP_KERNEL);
1183 return (ap->pad == NULL) ? -ENOMEM : 0;
1186 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1188 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1191 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1193 return (struct ata_port *) &host->hostdata[0];
1196 #endif /* __LINUX_LIBATA_H__ */