2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/config.h>
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/init.h>
40 #include <linux/list.h>
42 #include <linux/highmem.h>
43 #include <linux/spinlock.h>
44 #include <linux/blkdev.h>
45 #include <linux/delay.h>
46 #include <linux/timer.h>
47 #include <linux/interrupt.h>
48 #include <linux/completion.h>
49 #include <linux/suspend.h>
50 #include <linux/workqueue.h>
51 #include <linux/jiffies.h>
52 #include <scsi/scsi.h>
54 #include "scsi_priv.h"
55 #include <scsi/scsi_host.h>
56 #include <linux/libata.h>
58 #include <asm/semaphore.h>
59 #include <asm/byteorder.h>
63 static unsigned int ata_busy_sleep (struct ata_port
*ap
,
64 unsigned long tmout_pat
,
66 static void ata_dev_reread_id(struct ata_port
*ap
, struct ata_device
*dev
);
67 static void ata_dev_init_params(struct ata_port
*ap
, struct ata_device
*dev
);
68 static void ata_set_mode(struct ata_port
*ap
);
69 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
);
70 static unsigned int ata_get_mode_mask(const struct ata_port
*ap
, int shift
);
71 static int fgb(u32 bitmap
);
72 static int ata_choose_xfer_mode(const struct ata_port
*ap
,
74 unsigned int *xfer_shift_out
);
75 static void __ata_qc_complete(struct ata_queued_cmd
*qc
);
77 static unsigned int ata_unique_id
= 1;
78 static struct workqueue_struct
*ata_wq
;
80 int atapi_enabled
= 0;
81 module_param(atapi_enabled
, int, 0444);
82 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
84 MODULE_AUTHOR("Jeff Garzik");
85 MODULE_DESCRIPTION("Library module for ATA devices");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(DRV_VERSION
);
90 * ata_tf_load_pio - send taskfile registers to host controller
91 * @ap: Port to which output is sent
92 * @tf: ATA taskfile register set
94 * Outputs ATA taskfile to standard ATA host controller.
97 * Inherited from caller.
100 static void ata_tf_load_pio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
102 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
103 unsigned int is_addr
= tf
->flags
& ATA_TFLAG_ISADDR
;
105 if (tf
->ctl
!= ap
->last_ctl
) {
106 outb(tf
->ctl
, ioaddr
->ctl_addr
);
107 ap
->last_ctl
= tf
->ctl
;
111 if (is_addr
&& (tf
->flags
& ATA_TFLAG_LBA48
)) {
112 outb(tf
->hob_feature
, ioaddr
->feature_addr
);
113 outb(tf
->hob_nsect
, ioaddr
->nsect_addr
);
114 outb(tf
->hob_lbal
, ioaddr
->lbal_addr
);
115 outb(tf
->hob_lbam
, ioaddr
->lbam_addr
);
116 outb(tf
->hob_lbah
, ioaddr
->lbah_addr
);
117 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
126 outb(tf
->feature
, ioaddr
->feature_addr
);
127 outb(tf
->nsect
, ioaddr
->nsect_addr
);
128 outb(tf
->lbal
, ioaddr
->lbal_addr
);
129 outb(tf
->lbam
, ioaddr
->lbam_addr
);
130 outb(tf
->lbah
, ioaddr
->lbah_addr
);
131 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
139 if (tf
->flags
& ATA_TFLAG_DEVICE
) {
140 outb(tf
->device
, ioaddr
->device_addr
);
141 VPRINTK("device 0x%X\n", tf
->device
);
148 * ata_tf_load_mmio - send taskfile registers to host controller
149 * @ap: Port to which output is sent
150 * @tf: ATA taskfile register set
152 * Outputs ATA taskfile to standard ATA host controller using MMIO.
155 * Inherited from caller.
158 static void ata_tf_load_mmio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
160 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
161 unsigned int is_addr
= tf
->flags
& ATA_TFLAG_ISADDR
;
163 if (tf
->ctl
!= ap
->last_ctl
) {
164 writeb(tf
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
165 ap
->last_ctl
= tf
->ctl
;
169 if (is_addr
&& (tf
->flags
& ATA_TFLAG_LBA48
)) {
170 writeb(tf
->hob_feature
, (void __iomem
*) ioaddr
->feature_addr
);
171 writeb(tf
->hob_nsect
, (void __iomem
*) ioaddr
->nsect_addr
);
172 writeb(tf
->hob_lbal
, (void __iomem
*) ioaddr
->lbal_addr
);
173 writeb(tf
->hob_lbam
, (void __iomem
*) ioaddr
->lbam_addr
);
174 writeb(tf
->hob_lbah
, (void __iomem
*) ioaddr
->lbah_addr
);
175 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
184 writeb(tf
->feature
, (void __iomem
*) ioaddr
->feature_addr
);
185 writeb(tf
->nsect
, (void __iomem
*) ioaddr
->nsect_addr
);
186 writeb(tf
->lbal
, (void __iomem
*) ioaddr
->lbal_addr
);
187 writeb(tf
->lbam
, (void __iomem
*) ioaddr
->lbam_addr
);
188 writeb(tf
->lbah
, (void __iomem
*) ioaddr
->lbah_addr
);
189 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
197 if (tf
->flags
& ATA_TFLAG_DEVICE
) {
198 writeb(tf
->device
, (void __iomem
*) ioaddr
->device_addr
);
199 VPRINTK("device 0x%X\n", tf
->device
);
207 * ata_tf_load - send taskfile registers to host controller
208 * @ap: Port to which output is sent
209 * @tf: ATA taskfile register set
211 * Outputs ATA taskfile to standard ATA host controller using MMIO
212 * or PIO as indicated by the ATA_FLAG_MMIO flag.
213 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
214 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
215 * hob_lbal, hob_lbam, and hob_lbah.
217 * This function waits for idle (!BUSY and !DRQ) after writing
218 * registers. If the control register has a new value, this
219 * function also waits for idle after writing control and before
220 * writing the remaining registers.
222 * May be used as the tf_load() entry in ata_port_operations.
225 * Inherited from caller.
227 void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
229 if (ap
->flags
& ATA_FLAG_MMIO
)
230 ata_tf_load_mmio(ap
, tf
);
232 ata_tf_load_pio(ap
, tf
);
236 * ata_exec_command_pio - issue ATA command to host controller
237 * @ap: port to which command is being issued
238 * @tf: ATA taskfile register set
240 * Issues PIO write to ATA command register, with proper
241 * synchronization with interrupt handler / other threads.
244 * spin_lock_irqsave(host_set lock)
247 static void ata_exec_command_pio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
249 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
251 outb(tf
->command
, ap
->ioaddr
.command_addr
);
257 * ata_exec_command_mmio - issue ATA command to host controller
258 * @ap: port to which command is being issued
259 * @tf: ATA taskfile register set
261 * Issues MMIO write to ATA command register, with proper
262 * synchronization with interrupt handler / other threads.
265 * spin_lock_irqsave(host_set lock)
268 static void ata_exec_command_mmio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
270 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
272 writeb(tf
->command
, (void __iomem
*) ap
->ioaddr
.command_addr
);
278 * ata_exec_command - issue ATA command to host controller
279 * @ap: port to which command is being issued
280 * @tf: ATA taskfile register set
282 * Issues PIO/MMIO write to ATA command register, with proper
283 * synchronization with interrupt handler / other threads.
286 * spin_lock_irqsave(host_set lock)
288 void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
290 if (ap
->flags
& ATA_FLAG_MMIO
)
291 ata_exec_command_mmio(ap
, tf
);
293 ata_exec_command_pio(ap
, tf
);
297 * ata_exec - issue ATA command to host controller
298 * @ap: port to which command is being issued
299 * @tf: ATA taskfile register set
301 * Issues PIO/MMIO write to ATA command register, with proper
302 * synchronization with interrupt handler / other threads.
305 * Obtains host_set lock.
308 static inline void ata_exec(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
312 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
313 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
314 ap
->ops
->exec_command(ap
, tf
);
315 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
319 * ata_tf_to_host - issue ATA taskfile to host controller
320 * @ap: port to which command is being issued
321 * @tf: ATA taskfile register set
323 * Issues ATA taskfile register set to ATA host controller,
324 * with proper synchronization with interrupt handler and
328 * Obtains host_set lock.
331 static void ata_tf_to_host(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
333 ap
->ops
->tf_load(ap
, tf
);
339 * ata_tf_to_host_nolock - issue ATA taskfile to host controller
340 * @ap: port to which command is being issued
341 * @tf: ATA taskfile register set
343 * Issues ATA taskfile register set to ATA host controller,
344 * with proper synchronization with interrupt handler and
348 * spin_lock_irqsave(host_set lock)
351 void ata_tf_to_host_nolock(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
353 ap
->ops
->tf_load(ap
, tf
);
354 ap
->ops
->exec_command(ap
, tf
);
358 * ata_tf_read_pio - input device's ATA taskfile shadow registers
359 * @ap: Port from which input is read
360 * @tf: ATA taskfile register set for storing input
362 * Reads ATA taskfile registers for currently-selected device
366 * Inherited from caller.
369 static void ata_tf_read_pio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
371 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
373 tf
->command
= ata_check_status(ap
);
374 tf
->feature
= inb(ioaddr
->error_addr
);
375 tf
->nsect
= inb(ioaddr
->nsect_addr
);
376 tf
->lbal
= inb(ioaddr
->lbal_addr
);
377 tf
->lbam
= inb(ioaddr
->lbam_addr
);
378 tf
->lbah
= inb(ioaddr
->lbah_addr
);
379 tf
->device
= inb(ioaddr
->device_addr
);
381 if (tf
->flags
& ATA_TFLAG_LBA48
) {
382 outb(tf
->ctl
| ATA_HOB
, ioaddr
->ctl_addr
);
383 tf
->hob_feature
= inb(ioaddr
->error_addr
);
384 tf
->hob_nsect
= inb(ioaddr
->nsect_addr
);
385 tf
->hob_lbal
= inb(ioaddr
->lbal_addr
);
386 tf
->hob_lbam
= inb(ioaddr
->lbam_addr
);
387 tf
->hob_lbah
= inb(ioaddr
->lbah_addr
);
392 * ata_tf_read_mmio - input device's ATA taskfile shadow registers
393 * @ap: Port from which input is read
394 * @tf: ATA taskfile register set for storing input
396 * Reads ATA taskfile registers for currently-selected device
400 * Inherited from caller.
403 static void ata_tf_read_mmio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
405 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
407 tf
->command
= ata_check_status(ap
);
408 tf
->feature
= readb((void __iomem
*)ioaddr
->error_addr
);
409 tf
->nsect
= readb((void __iomem
*)ioaddr
->nsect_addr
);
410 tf
->lbal
= readb((void __iomem
*)ioaddr
->lbal_addr
);
411 tf
->lbam
= readb((void __iomem
*)ioaddr
->lbam_addr
);
412 tf
->lbah
= readb((void __iomem
*)ioaddr
->lbah_addr
);
413 tf
->device
= readb((void __iomem
*)ioaddr
->device_addr
);
415 if (tf
->flags
& ATA_TFLAG_LBA48
) {
416 writeb(tf
->ctl
| ATA_HOB
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
417 tf
->hob_feature
= readb((void __iomem
*)ioaddr
->error_addr
);
418 tf
->hob_nsect
= readb((void __iomem
*)ioaddr
->nsect_addr
);
419 tf
->hob_lbal
= readb((void __iomem
*)ioaddr
->lbal_addr
);
420 tf
->hob_lbam
= readb((void __iomem
*)ioaddr
->lbam_addr
);
421 tf
->hob_lbah
= readb((void __iomem
*)ioaddr
->lbah_addr
);
427 * ata_tf_read - input device's ATA taskfile shadow registers
428 * @ap: Port from which input is read
429 * @tf: ATA taskfile register set for storing input
431 * Reads ATA taskfile registers for currently-selected device
434 * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48
435 * is set, also reads the hob registers.
437 * May be used as the tf_read() entry in ata_port_operations.
440 * Inherited from caller.
442 void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
)
444 if (ap
->flags
& ATA_FLAG_MMIO
)
445 ata_tf_read_mmio(ap
, tf
);
447 ata_tf_read_pio(ap
, tf
);
451 * ata_check_status_pio - Read device status reg & clear interrupt
452 * @ap: port where the device is
454 * Reads ATA taskfile status register for currently-selected device
455 * and return its value. This also clears pending interrupts
459 * Inherited from caller.
461 static u8
ata_check_status_pio(struct ata_port
*ap
)
463 return inb(ap
->ioaddr
.status_addr
);
467 * ata_check_status_mmio - Read device status reg & clear interrupt
468 * @ap: port where the device is
470 * Reads ATA taskfile status register for currently-selected device
471 * via MMIO and return its value. This also clears pending interrupts
475 * Inherited from caller.
477 static u8
ata_check_status_mmio(struct ata_port
*ap
)
479 return readb((void __iomem
*) ap
->ioaddr
.status_addr
);
484 * ata_check_status - Read device status reg & clear interrupt
485 * @ap: port where the device is
487 * Reads ATA taskfile status register for currently-selected device
488 * and return its value. This also clears pending interrupts
491 * May be used as the check_status() entry in ata_port_operations.
494 * Inherited from caller.
496 u8
ata_check_status(struct ata_port
*ap
)
498 if (ap
->flags
& ATA_FLAG_MMIO
)
499 return ata_check_status_mmio(ap
);
500 return ata_check_status_pio(ap
);
505 * ata_altstatus - Read device alternate status reg
506 * @ap: port where the device is
508 * Reads ATA taskfile alternate status register for
509 * currently-selected device and return its value.
511 * Note: may NOT be used as the check_altstatus() entry in
512 * ata_port_operations.
515 * Inherited from caller.
517 u8
ata_altstatus(struct ata_port
*ap
)
519 if (ap
->ops
->check_altstatus
)
520 return ap
->ops
->check_altstatus(ap
);
522 if (ap
->flags
& ATA_FLAG_MMIO
)
523 return readb((void __iomem
*)ap
->ioaddr
.altstatus_addr
);
524 return inb(ap
->ioaddr
.altstatus_addr
);
529 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
530 * @tf: Taskfile to convert
531 * @fis: Buffer into which data will output
532 * @pmp: Port multiplier port
534 * Converts a standard ATA taskfile to a Serial ATA
535 * FIS structure (Register - Host to Device).
538 * Inherited from caller.
541 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
543 fis
[0] = 0x27; /* Register - Host to Device FIS */
544 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
545 bit 7 indicates Command FIS */
546 fis
[2] = tf
->command
;
547 fis
[3] = tf
->feature
;
554 fis
[8] = tf
->hob_lbal
;
555 fis
[9] = tf
->hob_lbam
;
556 fis
[10] = tf
->hob_lbah
;
557 fis
[11] = tf
->hob_feature
;
560 fis
[13] = tf
->hob_nsect
;
571 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
572 * @fis: Buffer from which data will be input
573 * @tf: Taskfile to output
575 * Converts a standard ATA taskfile to a Serial ATA
576 * FIS structure (Register - Host to Device).
579 * Inherited from caller.
582 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
584 tf
->command
= fis
[2]; /* status */
585 tf
->feature
= fis
[3]; /* error */
592 tf
->hob_lbal
= fis
[8];
593 tf
->hob_lbam
= fis
[9];
594 tf
->hob_lbah
= fis
[10];
597 tf
->hob_nsect
= fis
[13];
600 static const u8 ata_rw_cmds
[] = {
604 ATA_CMD_READ_MULTI_EXT
,
605 ATA_CMD_WRITE_MULTI_EXT
,
609 ATA_CMD_PIO_READ_EXT
,
610 ATA_CMD_PIO_WRITE_EXT
,
619 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
620 * @qc: command to examine and configure
622 * Examine the device configuration and tf->flags to calculate
623 * the proper read/write commands and protocol to use.
628 void ata_rwcmd_protocol(struct ata_queued_cmd
*qc
)
630 struct ata_taskfile
*tf
= &qc
->tf
;
631 struct ata_device
*dev
= qc
->dev
;
633 int index
, lba48
, write
;
635 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
636 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
638 if (dev
->flags
& ATA_DFLAG_PIO
) {
639 tf
->protocol
= ATA_PROT_PIO
;
640 index
= dev
->multi_count
? 0 : 4;
642 tf
->protocol
= ATA_PROT_DMA
;
646 tf
->command
= ata_rw_cmds
[index
+ lba48
+ write
];
649 static const char * xfer_mode_str
[] = {
669 * ata_udma_string - convert UDMA bit offset to string
670 * @mask: mask of bits supported; only highest bit counts.
672 * Determine string which represents the highest speed
673 * (highest bit in @udma_mask).
679 * Constant C string representing highest speed listed in
680 * @udma_mask, or the constant C string "<n/a>".
683 static const char *ata_mode_string(unsigned int mask
)
687 for (i
= 7; i
>= 0; i
--)
690 for (i
= ATA_SHIFT_MWDMA
+ 2; i
>= ATA_SHIFT_MWDMA
; i
--)
693 for (i
= ATA_SHIFT_PIO
+ 4; i
>= ATA_SHIFT_PIO
; i
--)
700 return xfer_mode_str
[i
];
704 * ata_pio_devchk - PATA device presence detection
705 * @ap: ATA channel to examine
706 * @device: Device to examine (starting at zero)
708 * This technique was originally described in
709 * Hale Landis's ATADRVR (www.ata-atapi.com), and
710 * later found its way into the ATA/ATAPI spec.
712 * Write a pattern to the ATA shadow registers,
713 * and if a device is present, it will respond by
714 * correctly storing and echoing back the
715 * ATA shadow register contents.
721 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
724 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
727 ap
->ops
->dev_select(ap
, device
);
729 outb(0x55, ioaddr
->nsect_addr
);
730 outb(0xaa, ioaddr
->lbal_addr
);
732 outb(0xaa, ioaddr
->nsect_addr
);
733 outb(0x55, ioaddr
->lbal_addr
);
735 outb(0x55, ioaddr
->nsect_addr
);
736 outb(0xaa, ioaddr
->lbal_addr
);
738 nsect
= inb(ioaddr
->nsect_addr
);
739 lbal
= inb(ioaddr
->lbal_addr
);
741 if ((nsect
== 0x55) && (lbal
== 0xaa))
742 return 1; /* we found a device */
744 return 0; /* nothing found */
748 * ata_mmio_devchk - PATA device presence detection
749 * @ap: ATA channel to examine
750 * @device: Device to examine (starting at zero)
752 * This technique was originally described in
753 * Hale Landis's ATADRVR (www.ata-atapi.com), and
754 * later found its way into the ATA/ATAPI spec.
756 * Write a pattern to the ATA shadow registers,
757 * and if a device is present, it will respond by
758 * correctly storing and echoing back the
759 * ATA shadow register contents.
765 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
768 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
771 ap
->ops
->dev_select(ap
, device
);
773 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
774 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
776 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
777 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
779 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
780 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
782 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
783 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
785 if ((nsect
== 0x55) && (lbal
== 0xaa))
786 return 1; /* we found a device */
788 return 0; /* nothing found */
792 * ata_devchk - PATA device presence detection
793 * @ap: ATA channel to examine
794 * @device: Device to examine (starting at zero)
796 * Dispatch ATA device presence detection, depending
797 * on whether we are using PIO or MMIO to talk to the
798 * ATA shadow registers.
804 static unsigned int ata_devchk(struct ata_port
*ap
,
807 if (ap
->flags
& ATA_FLAG_MMIO
)
808 return ata_mmio_devchk(ap
, device
);
809 return ata_pio_devchk(ap
, device
);
813 * ata_dev_classify - determine device type based on ATA-spec signature
814 * @tf: ATA taskfile register set for device to be identified
816 * Determine from taskfile register contents whether a device is
817 * ATA or ATAPI, as per "Signature and persistence" section
818 * of ATA/PI spec (volume 1, sect 5.14).
824 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
825 * the event of failure.
828 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
830 /* Apple's open source Darwin code hints that some devices only
831 * put a proper signature into the LBA mid/high registers,
832 * So, we only check those. It's sufficient for uniqueness.
835 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
836 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
837 DPRINTK("found ATA device by sig\n");
841 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
842 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
843 DPRINTK("found ATAPI device by sig\n");
844 return ATA_DEV_ATAPI
;
847 DPRINTK("unknown device\n");
848 return ATA_DEV_UNKNOWN
;
852 * ata_dev_try_classify - Parse returned ATA device signature
853 * @ap: ATA channel to examine
854 * @device: Device to examine (starting at zero)
856 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
857 * an ATA/ATAPI-defined set of values is placed in the ATA
858 * shadow registers, indicating the results of device detection
861 * Select the ATA device, and read the values from the ATA shadow
862 * registers. Then parse according to the Error register value,
863 * and the spec-defined values examined by ata_dev_classify().
869 static u8
ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
)
871 struct ata_device
*dev
= &ap
->device
[device
];
872 struct ata_taskfile tf
;
876 ap
->ops
->dev_select(ap
, device
);
878 memset(&tf
, 0, sizeof(tf
));
880 ap
->ops
->tf_read(ap
, &tf
);
883 dev
->class = ATA_DEV_NONE
;
885 /* see if device passed diags */
888 else if ((device
== 0) && (err
== 0x81))
893 /* determine if device if ATA or ATAPI */
894 class = ata_dev_classify(&tf
);
895 if (class == ATA_DEV_UNKNOWN
)
897 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
906 * ata_dev_id_string - Convert IDENTIFY DEVICE page into string
907 * @id: IDENTIFY DEVICE results we will examine
908 * @s: string into which data is output
909 * @ofs: offset into identify device page
910 * @len: length of string to return. must be an even number.
912 * The strings in the IDENTIFY DEVICE page are broken up into
913 * 16-bit chunks. Run through the string, and output each
914 * 8-bit chunk linearly, regardless of platform.
920 void ata_dev_id_string(const u16
*id
, unsigned char *s
,
921 unsigned int ofs
, unsigned int len
)
941 * ata_noop_dev_select - Select device 0/1 on ATA bus
942 * @ap: ATA channel to manipulate
943 * @device: ATA device (numbered from zero) to select
945 * This function performs no actual function.
947 * May be used as the dev_select() entry in ata_port_operations.
952 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
958 * ata_std_dev_select - Select device 0/1 on ATA bus
959 * @ap: ATA channel to manipulate
960 * @device: ATA device (numbered from zero) to select
962 * Use the method defined in the ATA specification to
963 * make either device 0, or device 1, active on the
964 * ATA channel. Works with both PIO and MMIO.
966 * May be used as the dev_select() entry in ata_port_operations.
972 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
977 tmp
= ATA_DEVICE_OBS
;
979 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
981 if (ap
->flags
& ATA_FLAG_MMIO
) {
982 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
984 outb(tmp
, ap
->ioaddr
.device_addr
);
986 ata_pause(ap
); /* needed; also flushes, for mmio */
990 * ata_dev_select - Select device 0/1 on ATA bus
991 * @ap: ATA channel to manipulate
992 * @device: ATA device (numbered from zero) to select
993 * @wait: non-zero to wait for Status register BSY bit to clear
994 * @can_sleep: non-zero if context allows sleeping
996 * Use the method defined in the ATA specification to
997 * make either device 0, or device 1, active on the
1000 * This is a high-level version of ata_std_dev_select(),
1001 * which additionally provides the services of inserting
1002 * the proper pauses and status polling, where needed.
1008 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1009 unsigned int wait
, unsigned int can_sleep
)
1011 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
1012 ap
->id
, device
, wait
);
1017 ap
->ops
->dev_select(ap
, device
);
1020 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
1027 * ata_dump_id - IDENTIFY DEVICE info debugging output
1028 * @dev: Device whose IDENTIFY DEVICE page we will dump
1030 * Dump selected 16-bit words from a detected device's
1031 * IDENTIFY PAGE page.
1037 static inline void ata_dump_id(const struct ata_device
*dev
)
1039 DPRINTK("49==0x%04x "
1049 DPRINTK("80==0x%04x "
1059 DPRINTK("88==0x%04x "
1066 * Compute the PIO modes available for this device. This is not as
1067 * trivial as it seems if we must consider early devices correctly.
1069 * FIXME: pre IDE drive timing (do we care ?).
1072 static unsigned int ata_pio_modes(const struct ata_device
*adev
)
1076 /* Usual case. Word 53 indicates word 88 is valid */
1077 if (adev
->id
[ATA_ID_FIELD_VALID
] & (1 << 2)) {
1078 modes
= adev
->id
[ATA_ID_PIO_MODES
] & 0x03;
1084 /* If word 88 isn't valid then Word 51 holds the PIO timing number
1085 for the maximum. Turn it into a mask and return it */
1086 modes
= (2 << (adev
->id
[ATA_ID_OLD_PIO_MODES
] & 0xFF)) - 1 ;
1091 * ata_dev_identify - obtain IDENTIFY x DEVICE page
1092 * @ap: port on which device we wish to probe resides
1093 * @device: device bus address, starting at zero
1095 * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE
1096 * command, and read back the 512-byte device information page.
1097 * The device information page is fed to us via the standard
1098 * PIO-IN protocol, but we hand-code it here. (TODO: investigate
1099 * using standard PIO-IN paths)
1101 * After reading the device information page, we use several
1102 * bits of information from it to initialize data structures
1103 * that will be used during the lifetime of the ata_device.
1104 * Other data from the info page is used to disqualify certain
1105 * older ATA devices we do not wish to support.
1108 * Inherited from caller. Some functions called by this function
1109 * obtain the host_set lock.
1112 static void ata_dev_identify(struct ata_port
*ap
, unsigned int device
)
1114 struct ata_device
*dev
= &ap
->device
[device
];
1115 unsigned int major_version
;
1117 unsigned long xfer_modes
;
1118 unsigned int using_edd
;
1119 DECLARE_COMPLETION(wait
);
1120 struct ata_queued_cmd
*qc
;
1121 unsigned long flags
;
1124 if (!ata_dev_present(dev
)) {
1125 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1130 if (ap
->flags
& (ATA_FLAG_SRST
| ATA_FLAG_SATA_RESET
))
1135 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, device
);
1137 assert (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ATAPI
||
1138 dev
->class == ATA_DEV_NONE
);
1140 ata_dev_select(ap
, device
, 1, 1); /* select device 0/1 */
1142 qc
= ata_qc_new_init(ap
, dev
);
1145 ata_sg_init_one(qc
, dev
->id
, sizeof(dev
->id
));
1146 qc
->dma_dir
= DMA_FROM_DEVICE
;
1147 qc
->tf
.protocol
= ATA_PROT_PIO
;
1151 if (dev
->class == ATA_DEV_ATA
) {
1152 qc
->tf
.command
= ATA_CMD_ID_ATA
;
1153 DPRINTK("do ATA identify\n");
1155 qc
->tf
.command
= ATA_CMD_ID_ATAPI
;
1156 DPRINTK("do ATAPI identify\n");
1159 qc
->waiting
= &wait
;
1160 qc
->complete_fn
= ata_qc_complete_noop
;
1162 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1163 rc
= ata_qc_issue(qc
);
1164 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1169 wait_for_completion(&wait
);
1171 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1172 ap
->ops
->tf_read(ap
, &qc
->tf
);
1173 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1175 if (qc
->tf
.command
& ATA_ERR
) {
1177 * arg! EDD works for all test cases, but seems to return
1178 * the ATA signature for some ATAPI devices. Until the
1179 * reason for this is found and fixed, we fix up the mess
1180 * here. If IDENTIFY DEVICE returns command aborted
1181 * (as ATAPI devices do), then we issue an
1182 * IDENTIFY PACKET DEVICE.
1184 * ATA software reset (SRST, the default) does not appear
1185 * to have this problem.
1187 if ((using_edd
) && (qc
->tf
.command
== ATA_CMD_ID_ATA
)) {
1188 u8 err
= qc
->tf
.feature
;
1189 if (err
& ATA_ABORTED
) {
1190 dev
->class = ATA_DEV_ATAPI
;
1201 swap_buf_le16(dev
->id
, ATA_ID_WORDS
);
1203 /* print device capabilities */
1204 printk(KERN_DEBUG
"ata%u: dev %u cfg "
1205 "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1206 ap
->id
, device
, dev
->id
[49],
1207 dev
->id
[82], dev
->id
[83], dev
->id
[84],
1208 dev
->id
[85], dev
->id
[86], dev
->id
[87],
1212 * common ATA, ATAPI feature tests
1215 /* we require DMA support (bits 8 of word 49) */
1216 if (!ata_id_has_dma(dev
->id
)) {
1217 printk(KERN_DEBUG
"ata%u: no dma\n", ap
->id
);
1221 /* quick-n-dirty find max transfer mode; for printk only */
1222 xfer_modes
= dev
->id
[ATA_ID_UDMA_MODES
];
1224 xfer_modes
= (dev
->id
[ATA_ID_MWDMA_MODES
]) << ATA_SHIFT_MWDMA
;
1226 xfer_modes
= ata_pio_modes(dev
);
1230 /* ATA-specific feature tests */
1231 if (dev
->class == ATA_DEV_ATA
) {
1232 if (!ata_id_is_ata(dev
->id
)) /* sanity check */
1235 /* get major version */
1236 tmp
= dev
->id
[ATA_ID_MAJOR_VER
];
1237 for (major_version
= 14; major_version
>= 1; major_version
--)
1238 if (tmp
& (1 << major_version
))
1242 * The exact sequence expected by certain pre-ATA4 drives is:
1245 * INITIALIZE DEVICE PARAMETERS
1247 * Some drives were very specific about that exact sequence.
1249 if (major_version
< 4 || (!ata_id_has_lba(dev
->id
))) {
1250 ata_dev_init_params(ap
, dev
);
1252 /* current CHS translation info (id[53-58]) might be
1253 * changed. reread the identify device info.
1255 ata_dev_reread_id(ap
, dev
);
1258 if (ata_id_has_lba(dev
->id
)) {
1259 dev
->flags
|= ATA_DFLAG_LBA
;
1261 if (ata_id_has_lba48(dev
->id
)) {
1262 dev
->flags
|= ATA_DFLAG_LBA48
;
1263 dev
->n_sectors
= ata_id_u64(dev
->id
, 100);
1265 dev
->n_sectors
= ata_id_u32(dev
->id
, 60);
1268 /* print device info to dmesg */
1269 printk(KERN_INFO
"ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n",
1272 ata_mode_string(xfer_modes
),
1273 (unsigned long long)dev
->n_sectors
,
1274 dev
->flags
& ATA_DFLAG_LBA48
? " LBA48" : " LBA");
1278 /* Default translation */
1279 dev
->cylinders
= dev
->id
[1];
1280 dev
->heads
= dev
->id
[3];
1281 dev
->sectors
= dev
->id
[6];
1282 dev
->n_sectors
= dev
->cylinders
* dev
->heads
* dev
->sectors
;
1284 if (ata_id_current_chs_valid(dev
->id
)) {
1285 /* Current CHS translation is valid. */
1286 dev
->cylinders
= dev
->id
[54];
1287 dev
->heads
= dev
->id
[55];
1288 dev
->sectors
= dev
->id
[56];
1290 dev
->n_sectors
= ata_id_u32(dev
->id
, 57);
1293 /* print device info to dmesg */
1294 printk(KERN_INFO
"ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n",
1297 ata_mode_string(xfer_modes
),
1298 (unsigned long long)dev
->n_sectors
,
1299 (int)dev
->cylinders
, (int)dev
->heads
, (int)dev
->sectors
);
1303 ap
->host
->max_cmd_len
= 16;
1306 /* ATAPI-specific feature tests */
1308 if (ata_id_is_ata(dev
->id
)) /* sanity check */
1311 rc
= atapi_cdb_len(dev
->id
);
1312 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1313 printk(KERN_WARNING
"ata%u: unsupported CDB len\n", ap
->id
);
1316 ap
->cdb_len
= (unsigned int) rc
;
1317 ap
->host
->max_cmd_len
= (unsigned char) ap
->cdb_len
;
1319 /* print device info to dmesg */
1320 printk(KERN_INFO
"ata%u: dev %u ATAPI, max %s\n",
1322 ata_mode_string(xfer_modes
));
1325 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1329 printk(KERN_WARNING
"ata%u: dev %u not supported, ignoring\n",
1332 dev
->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */
1333 DPRINTK("EXIT, err\n");
1337 static inline u8
ata_dev_knobble(const struct ata_port
*ap
)
1339 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(ap
->device
->id
)));
1343 * ata_dev_config - Run device specific handlers and check for
1344 * SATA->PATA bridges
1351 void ata_dev_config(struct ata_port
*ap
, unsigned int i
)
1353 /* limit bridge transfers to udma5, 200 sectors */
1354 if (ata_dev_knobble(ap
)) {
1355 printk(KERN_INFO
"ata%u(%u): applying bridge limits\n",
1356 ap
->id
, ap
->device
->devno
);
1357 ap
->udma_mask
&= ATA_UDMA5
;
1358 ap
->host
->max_sectors
= ATA_MAX_SECTORS
;
1359 ap
->host
->hostt
->max_sectors
= ATA_MAX_SECTORS
;
1360 ap
->device
->flags
|= ATA_DFLAG_LOCK_SECTORS
;
1363 if (ap
->ops
->dev_config
)
1364 ap
->ops
->dev_config(ap
, &ap
->device
[i
]);
1368 * ata_bus_probe - Reset and probe ATA bus
1371 * Master ATA bus probing function. Initiates a hardware-dependent
1372 * bus reset, then attempts to identify any devices found on
1376 * PCI/etc. bus probe sem.
1379 * Zero on success, non-zero on error.
1382 static int ata_bus_probe(struct ata_port
*ap
)
1384 unsigned int i
, found
= 0;
1386 ap
->ops
->phy_reset(ap
);
1387 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1390 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1391 ata_dev_identify(ap
, i
);
1392 if (ata_dev_present(&ap
->device
[i
])) {
1394 ata_dev_config(ap
,i
);
1398 if ((!found
) || (ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1399 goto err_out_disable
;
1402 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1403 goto err_out_disable
;
1408 ap
->ops
->port_disable(ap
);
1414 * ata_port_probe - Mark port as enabled
1415 * @ap: Port for which we indicate enablement
1417 * Modify @ap data structure such that the system
1418 * thinks that the entire port is enabled.
1420 * LOCKING: host_set lock, or some other form of
1424 void ata_port_probe(struct ata_port
*ap
)
1426 ap
->flags
&= ~ATA_FLAG_PORT_DISABLED
;
1430 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1431 * @ap: SATA port associated with target SATA PHY.
1433 * This function issues commands to standard SATA Sxxx
1434 * PHY registers, to wake up the phy (and device), and
1435 * clear any reset condition.
1438 * PCI/etc. bus probe sem.
1441 void __sata_phy_reset(struct ata_port
*ap
)
1444 unsigned long timeout
= jiffies
+ (HZ
* 5);
1446 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1447 /* issue phy wake/reset */
1448 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1449 /* Couldn't find anything in SATA I/II specs, but
1450 * AHCI-1.1 10.4.2 says at least 1 ms. */
1453 scr_write_flush(ap
, SCR_CONTROL
, 0x300); /* phy wake/clear reset */
1455 /* wait for phy to become ready, if necessary */
1458 sstatus
= scr_read(ap
, SCR_STATUS
);
1459 if ((sstatus
& 0xf) != 1)
1461 } while (time_before(jiffies
, timeout
));
1463 /* TODO: phy layer with polling, timeouts, etc. */
1464 if (sata_dev_present(ap
))
1467 sstatus
= scr_read(ap
, SCR_STATUS
);
1468 printk(KERN_INFO
"ata%u: no device found (phy stat %08x)\n",
1470 ata_port_disable(ap
);
1473 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1476 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1477 ata_port_disable(ap
);
1481 ap
->cbl
= ATA_CBL_SATA
;
1485 * sata_phy_reset - Reset SATA bus.
1486 * @ap: SATA port associated with target SATA PHY.
1488 * This function resets the SATA bus, and then probes
1489 * the bus for devices.
1492 * PCI/etc. bus probe sem.
1495 void sata_phy_reset(struct ata_port
*ap
)
1497 __sata_phy_reset(ap
);
1498 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1504 * ata_port_disable - Disable port.
1505 * @ap: Port to be disabled.
1507 * Modify @ap data structure such that the system
1508 * thinks that the entire port is disabled, and should
1509 * never attempt to probe or communicate with devices
1512 * LOCKING: host_set lock, or some other form of
1516 void ata_port_disable(struct ata_port
*ap
)
1518 ap
->device
[0].class = ATA_DEV_NONE
;
1519 ap
->device
[1].class = ATA_DEV_NONE
;
1520 ap
->flags
|= ATA_FLAG_PORT_DISABLED
;
1524 * This mode timing computation functionality is ported over from
1525 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1528 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1529 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1530 * for PIO 5, which is a nonstandard extension and UDMA6, which
1531 * is currently supported only by Maxtor drives.
1534 static const struct ata_timing ata_timing
[] = {
1536 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
1537 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
1538 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
1539 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
1541 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
1542 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
1543 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
1545 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1547 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
1548 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
1549 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
1551 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
1552 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
1553 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
1555 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1556 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
1557 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
1559 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
1560 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
1561 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
1563 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1568 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1569 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1571 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
1573 q
->setup
= EZ(t
->setup
* 1000, T
);
1574 q
->act8b
= EZ(t
->act8b
* 1000, T
);
1575 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
1576 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
1577 q
->active
= EZ(t
->active
* 1000, T
);
1578 q
->recover
= EZ(t
->recover
* 1000, T
);
1579 q
->cycle
= EZ(t
->cycle
* 1000, T
);
1580 q
->udma
= EZ(t
->udma
* 1000, UT
);
1583 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
1584 struct ata_timing
*m
, unsigned int what
)
1586 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
1587 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
1588 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
1589 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
1590 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
1591 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
1592 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
1593 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
1596 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
1598 const struct ata_timing
*t
;
1600 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
1601 if (t
->mode
== 0xFF)
1606 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
1607 struct ata_timing
*t
, int T
, int UT
)
1609 const struct ata_timing
*s
;
1610 struct ata_timing p
;
1616 if (!(s
= ata_timing_find_mode(speed
)))
1620 * If the drive is an EIDE drive, it can tell us it needs extended
1621 * PIO/MW_DMA cycle timing.
1624 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
1625 memset(&p
, 0, sizeof(p
));
1626 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
1627 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
1628 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
1629 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
1630 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
1632 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
1636 * Convert the timing to bus clock counts.
1639 ata_timing_quantize(s
, t
, T
, UT
);
1642 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, S.M.A.R.T
1643 * and some other commands. We have to ensure that the DMA cycle timing is
1644 * slower/equal than the fastest PIO timing.
1647 if (speed
> XFER_PIO_4
) {
1648 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
1649 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
1653 * Lenghten active & recovery time so that cycle time is correct.
1656 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
1657 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
1658 t
->rec8b
= t
->cyc8b
- t
->act8b
;
1661 if (t
->active
+ t
->recover
< t
->cycle
) {
1662 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
1663 t
->recover
= t
->cycle
- t
->active
;
1669 static const struct {
1672 } xfer_mode_classes
[] = {
1673 { ATA_SHIFT_UDMA
, XFER_UDMA_0
},
1674 { ATA_SHIFT_MWDMA
, XFER_MW_DMA_0
},
1675 { ATA_SHIFT_PIO
, XFER_PIO_0
},
1678 static inline u8
base_from_shift(unsigned int shift
)
1682 for (i
= 0; i
< ARRAY_SIZE(xfer_mode_classes
); i
++)
1683 if (xfer_mode_classes
[i
].shift
== shift
)
1684 return xfer_mode_classes
[i
].base
;
1689 static void ata_dev_set_mode(struct ata_port
*ap
, struct ata_device
*dev
)
1694 if (!ata_dev_present(dev
) || (ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1697 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
1698 dev
->flags
|= ATA_DFLAG_PIO
;
1700 ata_dev_set_xfermode(ap
, dev
);
1702 base
= base_from_shift(dev
->xfer_shift
);
1703 ofs
= dev
->xfer_mode
- base
;
1704 idx
= ofs
+ dev
->xfer_shift
;
1705 WARN_ON(idx
>= ARRAY_SIZE(xfer_mode_str
));
1707 DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n",
1708 idx
, dev
->xfer_shift
, (int)dev
->xfer_mode
, (int)base
, ofs
);
1710 printk(KERN_INFO
"ata%u: dev %u configured for %s\n",
1711 ap
->id
, dev
->devno
, xfer_mode_str
[idx
]);
1714 static int ata_host_set_pio(struct ata_port
*ap
)
1720 mask
= ata_get_mode_mask(ap
, ATA_SHIFT_PIO
);
1723 printk(KERN_WARNING
"ata%u: no PIO support\n", ap
->id
);
1727 base
= base_from_shift(ATA_SHIFT_PIO
);
1728 xfer_mode
= base
+ x
;
1730 DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n",
1731 (int)base
, (int)xfer_mode
, mask
, x
);
1733 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1734 struct ata_device
*dev
= &ap
->device
[i
];
1735 if (ata_dev_present(dev
)) {
1736 dev
->pio_mode
= xfer_mode
;
1737 dev
->xfer_mode
= xfer_mode
;
1738 dev
->xfer_shift
= ATA_SHIFT_PIO
;
1739 if (ap
->ops
->set_piomode
)
1740 ap
->ops
->set_piomode(ap
, dev
);
1747 static void ata_host_set_dma(struct ata_port
*ap
, u8 xfer_mode
,
1748 unsigned int xfer_shift
)
1752 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1753 struct ata_device
*dev
= &ap
->device
[i
];
1754 if (ata_dev_present(dev
)) {
1755 dev
->dma_mode
= xfer_mode
;
1756 dev
->xfer_mode
= xfer_mode
;
1757 dev
->xfer_shift
= xfer_shift
;
1758 if (ap
->ops
->set_dmamode
)
1759 ap
->ops
->set_dmamode(ap
, dev
);
1765 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1766 * @ap: port on which timings will be programmed
1768 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1771 * PCI/etc. bus probe sem.
1774 static void ata_set_mode(struct ata_port
*ap
)
1776 unsigned int xfer_shift
;
1780 /* step 1: always set host PIO timings */
1781 rc
= ata_host_set_pio(ap
);
1785 /* step 2: choose the best data xfer mode */
1786 xfer_mode
= xfer_shift
= 0;
1787 rc
= ata_choose_xfer_mode(ap
, &xfer_mode
, &xfer_shift
);
1791 /* step 3: if that xfer mode isn't PIO, set host DMA timings */
1792 if (xfer_shift
!= ATA_SHIFT_PIO
)
1793 ata_host_set_dma(ap
, xfer_mode
, xfer_shift
);
1795 /* step 4: update devices' xfer mode */
1796 ata_dev_set_mode(ap
, &ap
->device
[0]);
1797 ata_dev_set_mode(ap
, &ap
->device
[1]);
1799 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1802 if (ap
->ops
->post_set_mode
)
1803 ap
->ops
->post_set_mode(ap
);
1808 ata_port_disable(ap
);
1812 * ata_busy_sleep - sleep until BSY clears, or timeout
1813 * @ap: port containing status register to be polled
1814 * @tmout_pat: impatience timeout
1815 * @tmout: overall timeout
1817 * Sleep until ATA Status register bit BSY clears,
1818 * or a timeout occurs.
1824 static unsigned int ata_busy_sleep (struct ata_port
*ap
,
1825 unsigned long tmout_pat
,
1826 unsigned long tmout
)
1828 unsigned long timer_start
, timeout
;
1831 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
1832 timer_start
= jiffies
;
1833 timeout
= timer_start
+ tmout_pat
;
1834 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1836 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
1839 if (status
& ATA_BUSY
)
1840 printk(KERN_WARNING
"ata%u is slow to respond, "
1841 "please be patient\n", ap
->id
);
1843 timeout
= timer_start
+ tmout
;
1844 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1846 status
= ata_chk_status(ap
);
1849 if (status
& ATA_BUSY
) {
1850 printk(KERN_ERR
"ata%u failed to respond (%lu secs)\n",
1851 ap
->id
, tmout
/ HZ
);
1858 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
1860 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1861 unsigned int dev0
= devmask
& (1 << 0);
1862 unsigned int dev1
= devmask
& (1 << 1);
1863 unsigned long timeout
;
1865 /* if device 0 was found in ata_devchk, wait for its
1869 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1871 /* if device 1 was found in ata_devchk, wait for
1872 * register access, then wait for BSY to clear
1874 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
1878 ap
->ops
->dev_select(ap
, 1);
1879 if (ap
->flags
& ATA_FLAG_MMIO
) {
1880 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
1881 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
1883 nsect
= inb(ioaddr
->nsect_addr
);
1884 lbal
= inb(ioaddr
->lbal_addr
);
1886 if ((nsect
== 1) && (lbal
== 1))
1888 if (time_after(jiffies
, timeout
)) {
1892 msleep(50); /* give drive a breather */
1895 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1897 /* is all this really necessary? */
1898 ap
->ops
->dev_select(ap
, 0);
1900 ap
->ops
->dev_select(ap
, 1);
1902 ap
->ops
->dev_select(ap
, 0);
1906 * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
1907 * @ap: Port to reset and probe
1909 * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
1910 * probe the bus. Not often used these days.
1913 * PCI/etc. bus probe sem.
1917 static unsigned int ata_bus_edd(struct ata_port
*ap
)
1919 struct ata_taskfile tf
;
1921 /* set up execute-device-diag (bus reset) taskfile */
1922 /* also, take interrupts to a known state (disabled) */
1923 DPRINTK("execute-device-diag\n");
1924 ata_tf_init(ap
, &tf
, 0);
1926 tf
.command
= ATA_CMD_EDD
;
1927 tf
.protocol
= ATA_PROT_NODATA
;
1930 ata_tf_to_host(ap
, &tf
);
1932 /* spec says at least 2ms. but who knows with those
1933 * crazy ATAPI devices...
1937 return ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1940 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
1941 unsigned int devmask
)
1943 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1945 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
1947 /* software reset. causes dev0 to be selected */
1948 if (ap
->flags
& ATA_FLAG_MMIO
) {
1949 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
1950 udelay(20); /* FIXME: flush */
1951 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
1952 udelay(20); /* FIXME: flush */
1953 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
1955 outb(ap
->ctl
, ioaddr
->ctl_addr
);
1957 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
1959 outb(ap
->ctl
, ioaddr
->ctl_addr
);
1962 /* spec mandates ">= 2ms" before checking status.
1963 * We wait 150ms, because that was the magic delay used for
1964 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
1965 * between when the ATA command register is written, and then
1966 * status is checked. Because waiting for "a while" before
1967 * checking status is fine, post SRST, we perform this magic
1968 * delay here as well.
1972 ata_bus_post_reset(ap
, devmask
);
1978 * ata_bus_reset - reset host port and associated ATA channel
1979 * @ap: port to reset
1981 * This is typically the first time we actually start issuing
1982 * commands to the ATA channel. We wait for BSY to clear, then
1983 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
1984 * result. Determine what devices, if any, are on the channel
1985 * by looking at the device 0/1 error register. Look at the signature
1986 * stored in each device's taskfile registers, to determine if
1987 * the device is ATA or ATAPI.
1990 * PCI/etc. bus probe sem.
1991 * Obtains host_set lock.
1994 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
1997 void ata_bus_reset(struct ata_port
*ap
)
1999 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2000 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2002 unsigned int dev0
, dev1
= 0, rc
= 0, devmask
= 0;
2004 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2006 /* determine if device 0/1 are present */
2007 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2010 dev0
= ata_devchk(ap
, 0);
2012 dev1
= ata_devchk(ap
, 1);
2016 devmask
|= (1 << 0);
2018 devmask
|= (1 << 1);
2020 /* select device 0 again */
2021 ap
->ops
->dev_select(ap
, 0);
2023 /* issue bus reset */
2024 if (ap
->flags
& ATA_FLAG_SRST
)
2025 rc
= ata_bus_softreset(ap
, devmask
);
2026 else if ((ap
->flags
& ATA_FLAG_SATA_RESET
) == 0) {
2027 /* set up device control */
2028 if (ap
->flags
& ATA_FLAG_MMIO
)
2029 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2031 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2032 rc
= ata_bus_edd(ap
);
2039 * determine by signature whether we have ATA or ATAPI devices
2041 err
= ata_dev_try_classify(ap
, 0);
2042 if ((slave_possible
) && (err
!= 0x81))
2043 ata_dev_try_classify(ap
, 1);
2045 /* re-enable interrupts */
2046 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2049 /* is double-select really necessary? */
2050 if (ap
->device
[1].class != ATA_DEV_NONE
)
2051 ap
->ops
->dev_select(ap
, 1);
2052 if (ap
->device
[0].class != ATA_DEV_NONE
)
2053 ap
->ops
->dev_select(ap
, 0);
2055 /* if no devices were detected, disable this port */
2056 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2057 (ap
->device
[1].class == ATA_DEV_NONE
))
2060 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2061 /* set up device control for ATA_FLAG_SATA_RESET */
2062 if (ap
->flags
& ATA_FLAG_MMIO
)
2063 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2065 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2072 printk(KERN_ERR
"ata%u: disabling port\n", ap
->id
);
2073 ap
->ops
->port_disable(ap
);
2078 static void ata_pr_blacklisted(const struct ata_port
*ap
,
2079 const struct ata_device
*dev
)
2081 printk(KERN_WARNING
"ata%u: dev %u is on DMA blacklist, disabling DMA\n",
2082 ap
->id
, dev
->devno
);
2085 static const char * ata_dma_blacklist
[] = {
2104 "Toshiba CD-ROM XM-6202B",
2105 "TOSHIBA CD-ROM XM-1702BC",
2107 "E-IDE CD-ROM CR-840",
2110 "SAMSUNG CD-ROM SC-148C",
2111 "SAMSUNG CD-ROM SC",
2113 "ATAPI CD-ROM DRIVE 40X MAXIMUM",
2117 static int ata_dma_blacklisted(const struct ata_device
*dev
)
2119 unsigned char model_num
[40];
2124 ata_dev_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2127 len
= strnlen(s
, sizeof(model_num
));
2129 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2130 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2135 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
++)
2136 if (!strncmp(ata_dma_blacklist
[i
], s
, len
))
2142 static unsigned int ata_get_mode_mask(const struct ata_port
*ap
, int shift
)
2144 const struct ata_device
*master
, *slave
;
2147 master
= &ap
->device
[0];
2148 slave
= &ap
->device
[1];
2150 assert (ata_dev_present(master
) || ata_dev_present(slave
));
2152 if (shift
== ATA_SHIFT_UDMA
) {
2153 mask
= ap
->udma_mask
;
2154 if (ata_dev_present(master
)) {
2155 mask
&= (master
->id
[ATA_ID_UDMA_MODES
] & 0xff);
2156 if (ata_dma_blacklisted(master
)) {
2158 ata_pr_blacklisted(ap
, master
);
2161 if (ata_dev_present(slave
)) {
2162 mask
&= (slave
->id
[ATA_ID_UDMA_MODES
] & 0xff);
2163 if (ata_dma_blacklisted(slave
)) {
2165 ata_pr_blacklisted(ap
, slave
);
2169 else if (shift
== ATA_SHIFT_MWDMA
) {
2170 mask
= ap
->mwdma_mask
;
2171 if (ata_dev_present(master
)) {
2172 mask
&= (master
->id
[ATA_ID_MWDMA_MODES
] & 0x07);
2173 if (ata_dma_blacklisted(master
)) {
2175 ata_pr_blacklisted(ap
, master
);
2178 if (ata_dev_present(slave
)) {
2179 mask
&= (slave
->id
[ATA_ID_MWDMA_MODES
] & 0x07);
2180 if (ata_dma_blacklisted(slave
)) {
2182 ata_pr_blacklisted(ap
, slave
);
2186 else if (shift
== ATA_SHIFT_PIO
) {
2187 mask
= ap
->pio_mask
;
2188 if (ata_dev_present(master
)) {
2189 /* spec doesn't return explicit support for
2190 * PIO0-2, so we fake it
2192 u16 tmp_mode
= master
->id
[ATA_ID_PIO_MODES
] & 0x03;
2197 if (ata_dev_present(slave
)) {
2198 /* spec doesn't return explicit support for
2199 * PIO0-2, so we fake it
2201 u16 tmp_mode
= slave
->id
[ATA_ID_PIO_MODES
] & 0x03;
2208 mask
= 0xffffffff; /* shut up compiler warning */
2215 /* find greatest bit */
2216 static int fgb(u32 bitmap
)
2221 for (i
= 0; i
< 32; i
++)
2222 if (bitmap
& (1 << i
))
2229 * ata_choose_xfer_mode - attempt to find best transfer mode
2230 * @ap: Port for which an xfer mode will be selected
2231 * @xfer_mode_out: (output) SET FEATURES - XFER MODE code
2232 * @xfer_shift_out: (output) bit shift that selects this mode
2234 * Based on host and device capabilities, determine the
2235 * maximum transfer mode that is amenable to all.
2238 * PCI/etc. bus probe sem.
2241 * Zero on success, negative on error.
2244 static int ata_choose_xfer_mode(const struct ata_port
*ap
,
2246 unsigned int *xfer_shift_out
)
2248 unsigned int mask
, shift
;
2251 for (i
= 0; i
< ARRAY_SIZE(xfer_mode_classes
); i
++) {
2252 shift
= xfer_mode_classes
[i
].shift
;
2253 mask
= ata_get_mode_mask(ap
, shift
);
2257 *xfer_mode_out
= xfer_mode_classes
[i
].base
+ x
;
2258 *xfer_shift_out
= shift
;
2267 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2268 * @ap: Port associated with device @dev
2269 * @dev: Device to which command will be sent
2271 * Issue SET FEATURES - XFER MODE command to device @dev
2275 * PCI/etc. bus probe sem.
2278 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
)
2280 DECLARE_COMPLETION(wait
);
2281 struct ata_queued_cmd
*qc
;
2283 unsigned long flags
;
2285 /* set up set-features taskfile */
2286 DPRINTK("set features - xfer mode\n");
2288 qc
= ata_qc_new_init(ap
, dev
);
2291 qc
->tf
.command
= ATA_CMD_SET_FEATURES
;
2292 qc
->tf
.feature
= SETFEATURES_XFER
;
2293 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2294 qc
->tf
.protocol
= ATA_PROT_NODATA
;
2295 qc
->tf
.nsect
= dev
->xfer_mode
;
2297 qc
->waiting
= &wait
;
2298 qc
->complete_fn
= ata_qc_complete_noop
;
2300 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2301 rc
= ata_qc_issue(qc
);
2302 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2305 ata_port_disable(ap
);
2307 wait_for_completion(&wait
);
2313 * ata_dev_reread_id - Reread the device identify device info
2314 * @ap: port where the device is
2315 * @dev: device to reread the identify device info
2320 static void ata_dev_reread_id(struct ata_port
*ap
, struct ata_device
*dev
)
2322 DECLARE_COMPLETION(wait
);
2323 struct ata_queued_cmd
*qc
;
2324 unsigned long flags
;
2327 qc
= ata_qc_new_init(ap
, dev
);
2330 ata_sg_init_one(qc
, dev
->id
, sizeof(dev
->id
));
2331 qc
->dma_dir
= DMA_FROM_DEVICE
;
2333 if (dev
->class == ATA_DEV_ATA
) {
2334 qc
->tf
.command
= ATA_CMD_ID_ATA
;
2335 DPRINTK("do ATA identify\n");
2337 qc
->tf
.command
= ATA_CMD_ID_ATAPI
;
2338 DPRINTK("do ATAPI identify\n");
2341 qc
->tf
.flags
|= ATA_TFLAG_DEVICE
;
2342 qc
->tf
.protocol
= ATA_PROT_PIO
;
2345 qc
->waiting
= &wait
;
2346 qc
->complete_fn
= ata_qc_complete_noop
;
2348 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2349 rc
= ata_qc_issue(qc
);
2350 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2355 wait_for_completion(&wait
);
2357 swap_buf_le16(dev
->id
, ATA_ID_WORDS
);
2365 ata_port_disable(ap
);
2369 * ata_dev_init_params - Issue INIT DEV PARAMS command
2370 * @ap: Port associated with device @dev
2371 * @dev: Device to which command will be sent
2376 static void ata_dev_init_params(struct ata_port
*ap
, struct ata_device
*dev
)
2378 DECLARE_COMPLETION(wait
);
2379 struct ata_queued_cmd
*qc
;
2381 unsigned long flags
;
2382 u16 sectors
= dev
->id
[6];
2383 u16 heads
= dev
->id
[3];
2385 /* Number of sectors per track 1-255. Number of heads 1-16 */
2386 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
2389 /* set up init dev params taskfile */
2390 DPRINTK("init dev params \n");
2392 qc
= ata_qc_new_init(ap
, dev
);
2395 qc
->tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
2396 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2397 qc
->tf
.protocol
= ATA_PROT_NODATA
;
2398 qc
->tf
.nsect
= sectors
;
2399 qc
->tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
2401 qc
->waiting
= &wait
;
2402 qc
->complete_fn
= ata_qc_complete_noop
;
2404 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2405 rc
= ata_qc_issue(qc
);
2406 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2409 ata_port_disable(ap
);
2411 wait_for_completion(&wait
);
2417 * ata_sg_clean - Unmap DMA memory associated with command
2418 * @qc: Command containing DMA memory to be released
2420 * Unmap all mapped DMA memory associated with this command.
2423 * spin_lock_irqsave(host_set lock)
2426 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
2428 struct ata_port
*ap
= qc
->ap
;
2429 struct scatterlist
*sg
= qc
->sg
;
2430 int dir
= qc
->dma_dir
;
2432 assert(qc
->flags
& ATA_QCFLAG_DMAMAP
);
2435 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
2436 assert(qc
->n_elem
== 1);
2438 DPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
2440 if (qc
->flags
& ATA_QCFLAG_SG
)
2441 dma_unmap_sg(ap
->host_set
->dev
, sg
, qc
->n_elem
, dir
);
2443 dma_unmap_single(ap
->host_set
->dev
, sg_dma_address(&sg
[0]),
2444 sg_dma_len(&sg
[0]), dir
);
2446 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
2451 * ata_fill_sg - Fill PCI IDE PRD table
2452 * @qc: Metadata associated with taskfile to be transferred
2454 * Fill PCI IDE PRD (scatter-gather) table with segments
2455 * associated with the current disk command.
2458 * spin_lock_irqsave(host_set lock)
2461 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
2463 struct scatterlist
*sg
= qc
->sg
;
2464 struct ata_port
*ap
= qc
->ap
;
2465 unsigned int idx
, nelem
;
2468 assert(qc
->n_elem
> 0);
2471 for (nelem
= qc
->n_elem
; nelem
; nelem
--,sg
++) {
2475 /* determine if physical DMA addr spans 64K boundary.
2476 * Note h/w doesn't support 64-bit, so we unconditionally
2477 * truncate dma_addr_t to u32.
2479 addr
= (u32
) sg_dma_address(sg
);
2480 sg_len
= sg_dma_len(sg
);
2483 offset
= addr
& 0xffff;
2485 if ((offset
+ sg_len
) > 0x10000)
2486 len
= 0x10000 - offset
;
2488 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
2489 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
2490 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
2499 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
2502 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2503 * @qc: Metadata associated with taskfile to check
2505 * Allow low-level driver to filter ATA PACKET commands, returning
2506 * a status indicating whether or not it is OK to use DMA for the
2507 * supplied PACKET command.
2510 * spin_lock_irqsave(host_set lock)
2512 * RETURNS: 0 when ATAPI DMA can be used
2515 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
2517 struct ata_port
*ap
= qc
->ap
;
2518 int rc
= 0; /* Assume ATAPI DMA is OK by default */
2520 if (ap
->ops
->check_atapi_dma
)
2521 rc
= ap
->ops
->check_atapi_dma(qc
);
2526 * ata_qc_prep - Prepare taskfile for submission
2527 * @qc: Metadata associated with taskfile to be prepared
2529 * Prepare ATA taskfile for submission.
2532 * spin_lock_irqsave(host_set lock)
2534 void ata_qc_prep(struct ata_queued_cmd
*qc
)
2536 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
2543 * ata_sg_init_one - Associate command with memory buffer
2544 * @qc: Command to be associated
2545 * @buf: Memory buffer
2546 * @buflen: Length of memory buffer, in bytes.
2548 * Initialize the data-related elements of queued_cmd @qc
2549 * to point to a single memory buffer, @buf of byte length @buflen.
2552 * spin_lock_irqsave(host_set lock)
2555 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
2557 struct scatterlist
*sg
;
2559 qc
->flags
|= ATA_QCFLAG_SINGLE
;
2561 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
2562 qc
->sg
= &qc
->sgent
;
2567 sg
->page
= virt_to_page(buf
);
2568 sg
->offset
= (unsigned long) buf
& ~PAGE_MASK
;
2569 sg
->length
= buflen
;
2573 * ata_sg_init - Associate command with scatter-gather table.
2574 * @qc: Command to be associated
2575 * @sg: Scatter-gather table.
2576 * @n_elem: Number of elements in s/g table.
2578 * Initialize the data-related elements of queued_cmd @qc
2579 * to point to a scatter-gather table @sg, containing @n_elem
2583 * spin_lock_irqsave(host_set lock)
2586 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
2587 unsigned int n_elem
)
2589 qc
->flags
|= ATA_QCFLAG_SG
;
2591 qc
->n_elem
= n_elem
;
2595 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2596 * @qc: Command with memory buffer to be mapped.
2598 * DMA-map the memory buffer associated with queued_cmd @qc.
2601 * spin_lock_irqsave(host_set lock)
2604 * Zero on success, negative on error.
2607 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
2609 struct ata_port
*ap
= qc
->ap
;
2610 int dir
= qc
->dma_dir
;
2611 struct scatterlist
*sg
= qc
->sg
;
2612 dma_addr_t dma_address
;
2614 dma_address
= dma_map_single(ap
->host_set
->dev
, qc
->buf_virt
,
2616 if (dma_mapping_error(dma_address
))
2619 sg_dma_address(sg
) = dma_address
;
2620 sg_dma_len(sg
) = sg
->length
;
2622 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
2623 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
2629 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
2630 * @qc: Command with scatter-gather table to be mapped.
2632 * DMA-map the scatter-gather table associated with queued_cmd @qc.
2635 * spin_lock_irqsave(host_set lock)
2638 * Zero on success, negative on error.
2642 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
2644 struct ata_port
*ap
= qc
->ap
;
2645 struct scatterlist
*sg
= qc
->sg
;
2648 VPRINTK("ENTER, ata%u\n", ap
->id
);
2649 assert(qc
->flags
& ATA_QCFLAG_SG
);
2652 n_elem
= dma_map_sg(ap
->host_set
->dev
, sg
, qc
->n_elem
, dir
);
2656 DPRINTK("%d sg elements mapped\n", n_elem
);
2658 qc
->n_elem
= n_elem
;
2664 * ata_poll_qc_complete - turn irq back on and finish qc
2665 * @qc: Command to complete
2666 * @drv_stat: ATA status register content
2669 * None. (grabs host lock)
2672 void ata_poll_qc_complete(struct ata_queued_cmd
*qc
, u8 drv_stat
)
2674 struct ata_port
*ap
= qc
->ap
;
2675 unsigned long flags
;
2677 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2678 ap
->flags
&= ~ATA_FLAG_NOINTR
;
2680 ata_qc_complete(qc
, drv_stat
);
2681 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2686 * @ap: the target ata_port
2689 * None. (executing in kernel thread context)
2692 * timeout value to use
2695 static unsigned long ata_pio_poll(struct ata_port
*ap
)
2698 unsigned int poll_state
= HSM_ST_UNKNOWN
;
2699 unsigned int reg_state
= HSM_ST_UNKNOWN
;
2700 const unsigned int tmout_state
= HSM_ST_TMOUT
;
2702 switch (ap
->hsm_task_state
) {
2705 poll_state
= HSM_ST_POLL
;
2709 case HSM_ST_LAST_POLL
:
2710 poll_state
= HSM_ST_LAST_POLL
;
2711 reg_state
= HSM_ST_LAST
;
2718 status
= ata_chk_status(ap
);
2719 if (status
& ATA_BUSY
) {
2720 if (time_after(jiffies
, ap
->pio_task_timeout
)) {
2721 ap
->hsm_task_state
= tmout_state
;
2724 ap
->hsm_task_state
= poll_state
;
2725 return ATA_SHORT_PAUSE
;
2728 ap
->hsm_task_state
= reg_state
;
2733 * ata_pio_complete - check if drive is busy or idle
2734 * @ap: the target ata_port
2737 * None. (executing in kernel thread context)
2740 * Non-zero if qc completed, zero otherwise.
2743 static int ata_pio_complete (struct ata_port
*ap
)
2745 struct ata_queued_cmd
*qc
;
2749 * This is purely heuristic. This is a fast path. Sometimes when
2750 * we enter, BSY will be cleared in a chk-status or two. If not,
2751 * the drive is probably seeking or something. Snooze for a couple
2752 * msecs, then chk-status again. If still busy, fall back to
2753 * HSM_ST_POLL state.
2755 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 10);
2756 if (drv_stat
& (ATA_BUSY
| ATA_DRQ
)) {
2758 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 10);
2759 if (drv_stat
& (ATA_BUSY
| ATA_DRQ
)) {
2760 ap
->hsm_task_state
= HSM_ST_LAST_POLL
;
2761 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
2766 drv_stat
= ata_wait_idle(ap
);
2767 if (!ata_ok(drv_stat
)) {
2768 ap
->hsm_task_state
= HSM_ST_ERR
;
2772 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
2775 ap
->hsm_task_state
= HSM_ST_IDLE
;
2777 ata_poll_qc_complete(qc
, drv_stat
);
2779 /* another command may start at this point */
2786 * swap_buf_le16 - swap halves of 16-words in place
2787 * @buf: Buffer to swap
2788 * @buf_words: Number of 16-bit words in buffer.
2790 * Swap halves of 16-bit words if needed to convert from
2791 * little-endian byte order to native cpu byte order, or
2795 * Inherited from caller.
2797 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
2802 for (i
= 0; i
< buf_words
; i
++)
2803 buf
[i
] = le16_to_cpu(buf
[i
]);
2804 #endif /* __BIG_ENDIAN */
2808 * ata_mmio_data_xfer - Transfer data by MMIO
2809 * @ap: port to read/write
2811 * @buflen: buffer length
2812 * @write_data: read/write
2814 * Transfer data from/to the device data register by MMIO.
2817 * Inherited from caller.
2820 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
2821 unsigned int buflen
, int write_data
)
2824 unsigned int words
= buflen
>> 1;
2825 u16
*buf16
= (u16
*) buf
;
2826 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
2828 /* Transfer multiple of 2 bytes */
2830 for (i
= 0; i
< words
; i
++)
2831 writew(le16_to_cpu(buf16
[i
]), mmio
);
2833 for (i
= 0; i
< words
; i
++)
2834 buf16
[i
] = cpu_to_le16(readw(mmio
));
2837 /* Transfer trailing 1 byte, if any. */
2838 if (unlikely(buflen
& 0x01)) {
2839 u16 align_buf
[1] = { 0 };
2840 unsigned char *trailing_buf
= buf
+ buflen
- 1;
2843 memcpy(align_buf
, trailing_buf
, 1);
2844 writew(le16_to_cpu(align_buf
[0]), mmio
);
2846 align_buf
[0] = cpu_to_le16(readw(mmio
));
2847 memcpy(trailing_buf
, align_buf
, 1);
2853 * ata_pio_data_xfer - Transfer data by PIO
2854 * @ap: port to read/write
2856 * @buflen: buffer length
2857 * @write_data: read/write
2859 * Transfer data from/to the device data register by PIO.
2862 * Inherited from caller.
2865 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
2866 unsigned int buflen
, int write_data
)
2868 unsigned int words
= buflen
>> 1;
2870 /* Transfer multiple of 2 bytes */
2872 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
2874 insw(ap
->ioaddr
.data_addr
, buf
, words
);
2876 /* Transfer trailing 1 byte, if any. */
2877 if (unlikely(buflen
& 0x01)) {
2878 u16 align_buf
[1] = { 0 };
2879 unsigned char *trailing_buf
= buf
+ buflen
- 1;
2882 memcpy(align_buf
, trailing_buf
, 1);
2883 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
2885 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
2886 memcpy(trailing_buf
, align_buf
, 1);
2892 * ata_data_xfer - Transfer data from/to the data register.
2893 * @ap: port to read/write
2895 * @buflen: buffer length
2896 * @do_write: read/write
2898 * Transfer data from/to the device data register.
2901 * Inherited from caller.
2904 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
2905 unsigned int buflen
, int do_write
)
2907 if (ap
->flags
& ATA_FLAG_MMIO
)
2908 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
2910 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
2914 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
2915 * @qc: Command on going
2917 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
2920 * Inherited from caller.
2923 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
2925 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
2926 struct scatterlist
*sg
= qc
->sg
;
2927 struct ata_port
*ap
= qc
->ap
;
2929 unsigned int offset
;
2932 if (qc
->cursect
== (qc
->nsect
- 1))
2933 ap
->hsm_task_state
= HSM_ST_LAST
;
2935 page
= sg
[qc
->cursg
].page
;
2936 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
2938 /* get the current page and offset */
2939 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
2940 offset
%= PAGE_SIZE
;
2942 buf
= kmap(page
) + offset
;
2947 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
2952 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
2954 /* do the actual data transfer */
2955 do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
2956 ata_data_xfer(ap
, buf
, ATA_SECT_SIZE
, do_write
);
2962 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
2963 * @qc: Command on going
2964 * @bytes: number of bytes
2966 * Transfer Transfer data from/to the ATAPI device.
2969 * Inherited from caller.
2973 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
2975 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
2976 struct scatterlist
*sg
= qc
->sg
;
2977 struct ata_port
*ap
= qc
->ap
;
2980 unsigned int offset
, count
;
2982 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
2983 ap
->hsm_task_state
= HSM_ST_LAST
;
2986 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
2988 * The end of qc->sg is reached and the device expects
2989 * more data to transfer. In order not to overrun qc->sg
2990 * and fulfill length specified in the byte count register,
2991 * - for read case, discard trailing data from the device
2992 * - for write case, padding zero data to the device
2994 u16 pad_buf
[1] = { 0 };
2995 unsigned int words
= bytes
>> 1;
2998 if (words
) /* warning if bytes > 1 */
2999 printk(KERN_WARNING
"ata%u: %u bytes trailing data\n",
3002 for (i
= 0; i
< words
; i
++)
3003 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
3005 ap
->hsm_task_state
= HSM_ST_LAST
;
3009 sg
= &qc
->sg
[qc
->cursg
];
3012 offset
= sg
->offset
+ qc
->cursg_ofs
;
3014 /* get the current page and offset */
3015 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3016 offset
%= PAGE_SIZE
;
3018 /* don't overrun current sg */
3019 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
3021 /* don't cross page boundaries */
3022 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
3024 buf
= kmap(page
) + offset
;
3027 qc
->curbytes
+= count
;
3028 qc
->cursg_ofs
+= count
;
3030 if (qc
->cursg_ofs
== sg
->length
) {
3035 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3037 /* do the actual data transfer */
3038 ata_data_xfer(ap
, buf
, count
, do_write
);
3047 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3048 * @qc: Command on going
3050 * Transfer Transfer data from/to the ATAPI device.
3053 * Inherited from caller.
3056 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3058 struct ata_port
*ap
= qc
->ap
;
3059 struct ata_device
*dev
= qc
->dev
;
3060 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3061 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3063 ap
->ops
->tf_read(ap
, &qc
->tf
);
3064 ireason
= qc
->tf
.nsect
;
3065 bc_lo
= qc
->tf
.lbam
;
3066 bc_hi
= qc
->tf
.lbah
;
3067 bytes
= (bc_hi
<< 8) | bc_lo
;
3069 /* shall be cleared to zero, indicating xfer of data */
3070 if (ireason
& (1 << 0))
3073 /* make sure transfer direction matches expected */
3074 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3075 if (do_write
!= i_write
)
3078 __atapi_pio_bytes(qc
, bytes
);
3083 printk(KERN_INFO
"ata%u: dev %u: ATAPI check failed\n",
3084 ap
->id
, dev
->devno
);
3085 ap
->hsm_task_state
= HSM_ST_ERR
;
3089 * ata_pio_block - start PIO on a block
3090 * @ap: the target ata_port
3093 * None. (executing in kernel thread context)
3096 static void ata_pio_block(struct ata_port
*ap
)
3098 struct ata_queued_cmd
*qc
;
3102 * This is purely heuristic. This is a fast path.
3103 * Sometimes when we enter, BSY will be cleared in
3104 * a chk-status or two. If not, the drive is probably seeking
3105 * or something. Snooze for a couple msecs, then
3106 * chk-status again. If still busy, fall back to
3107 * HSM_ST_POLL state.
3109 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
3110 if (status
& ATA_BUSY
) {
3112 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3113 if (status
& ATA_BUSY
) {
3114 ap
->hsm_task_state
= HSM_ST_POLL
;
3115 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3120 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3123 if (is_atapi_taskfile(&qc
->tf
)) {
3124 /* no more data to transfer or unsupported ATAPI command */
3125 if ((status
& ATA_DRQ
) == 0) {
3126 ap
->hsm_task_state
= HSM_ST_LAST
;
3130 atapi_pio_bytes(qc
);
3132 /* handle BSY=0, DRQ=0 as error */
3133 if ((status
& ATA_DRQ
) == 0) {
3134 ap
->hsm_task_state
= HSM_ST_ERR
;
3142 static void ata_pio_error(struct ata_port
*ap
)
3144 struct ata_queued_cmd
*qc
;
3147 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3150 drv_stat
= ata_chk_status(ap
);
3151 printk(KERN_WARNING
"ata%u: PIO error, drv_stat 0x%x\n",
3154 ap
->hsm_task_state
= HSM_ST_IDLE
;
3156 ata_poll_qc_complete(qc
, drv_stat
| ATA_ERR
);
3159 static void ata_pio_task(void *_data
)
3161 struct ata_port
*ap
= _data
;
3162 unsigned long timeout
;
3169 switch (ap
->hsm_task_state
) {
3178 qc_completed
= ata_pio_complete(ap
);
3182 case HSM_ST_LAST_POLL
:
3183 timeout
= ata_pio_poll(ap
);
3193 queue_delayed_work(ata_wq
, &ap
->pio_task
, timeout
);
3194 else if (!qc_completed
)
3199 * ata_qc_timeout - Handle timeout of queued command
3200 * @qc: Command that timed out
3202 * Some part of the kernel (currently, only the SCSI layer)
3203 * has noticed that the active command on port @ap has not
3204 * completed after a specified length of time. Handle this
3205 * condition by disabling DMA (if necessary) and completing
3206 * transactions, with error if necessary.
3208 * This also handles the case of the "lost interrupt", where
3209 * for some reason (possibly hardware bug, possibly driver bug)
3210 * an interrupt was not delivered to the driver, even though the
3211 * transaction completed successfully.
3214 * Inherited from SCSI layer (none, can sleep)
3217 static void ata_qc_timeout(struct ata_queued_cmd
*qc
)
3219 struct ata_port
*ap
= qc
->ap
;
3220 struct ata_host_set
*host_set
= ap
->host_set
;
3221 struct ata_device
*dev
= qc
->dev
;
3222 u8 host_stat
= 0, drv_stat
;
3223 unsigned long flags
;
3227 /* FIXME: doesn't this conflict with timeout handling? */
3228 if (qc
->dev
->class == ATA_DEV_ATAPI
&& qc
->scsicmd
) {
3229 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
3231 if (!(cmd
->eh_eflags
& SCSI_EH_CANCEL_CMD
)) {
3233 /* finish completing original command */
3234 spin_lock_irqsave(&host_set
->lock
, flags
);
3235 __ata_qc_complete(qc
);
3236 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3238 atapi_request_sense(ap
, dev
, cmd
);
3240 cmd
->result
= (CHECK_CONDITION
<< 1) | (DID_OK
<< 16);
3241 scsi_finish_command(cmd
);
3247 spin_lock_irqsave(&host_set
->lock
, flags
);
3249 /* hack alert! We cannot use the supplied completion
3250 * function from inside the ->eh_strategy_handler() thread.
3251 * libata is the only user of ->eh_strategy_handler() in
3252 * any kernel, so the default scsi_done() assumes it is
3253 * not being called from the SCSI EH.
3255 qc
->scsidone
= scsi_finish_command
;
3257 switch (qc
->tf
.protocol
) {
3260 case ATA_PROT_ATAPI_DMA
:
3261 host_stat
= ap
->ops
->bmdma_status(ap
);
3263 /* before we do anything else, clear DMA-Start bit */
3264 ap
->ops
->bmdma_stop(qc
);
3270 drv_stat
= ata_chk_status(ap
);
3272 /* ack bmdma irq events */
3273 ap
->ops
->irq_clear(ap
);
3275 printk(KERN_ERR
"ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3276 ap
->id
, qc
->tf
.command
, drv_stat
, host_stat
);
3278 /* complete taskfile transaction */
3279 ata_qc_complete(qc
, drv_stat
);
3283 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3290 * ata_eng_timeout - Handle timeout of queued command
3291 * @ap: Port on which timed-out command is active
3293 * Some part of the kernel (currently, only the SCSI layer)
3294 * has noticed that the active command on port @ap has not
3295 * completed after a specified length of time. Handle this
3296 * condition by disabling DMA (if necessary) and completing
3297 * transactions, with error if necessary.
3299 * This also handles the case of the "lost interrupt", where
3300 * for some reason (possibly hardware bug, possibly driver bug)
3301 * an interrupt was not delivered to the driver, even though the
3302 * transaction completed successfully.
3305 * Inherited from SCSI layer (none, can sleep)
3308 void ata_eng_timeout(struct ata_port
*ap
)
3310 struct ata_queued_cmd
*qc
;
3314 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3318 printk(KERN_ERR
"ata%u: BUG: timeout without command\n",
3328 * ata_qc_new - Request an available ATA command, for queueing
3329 * @ap: Port associated with device @dev
3330 * @dev: Device from whom we request an available command structure
3336 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
3338 struct ata_queued_cmd
*qc
= NULL
;
3341 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++)
3342 if (!test_and_set_bit(i
, &ap
->qactive
)) {
3343 qc
= ata_qc_from_tag(ap
, i
);
3354 * ata_qc_new_init - Request an available ATA command, and initialize it
3355 * @ap: Port associated with device @dev
3356 * @dev: Device from whom we request an available command structure
3362 struct ata_queued_cmd
*ata_qc_new_init(struct ata_port
*ap
,
3363 struct ata_device
*dev
)
3365 struct ata_queued_cmd
*qc
;
3367 qc
= ata_qc_new(ap
);
3374 qc
->cursect
= qc
->cursg
= qc
->cursg_ofs
= 0;
3376 qc
->nbytes
= qc
->curbytes
= 0;
3378 ata_tf_init(ap
, &qc
->tf
, dev
->devno
);
3384 int ata_qc_complete_noop(struct ata_queued_cmd
*qc
, u8 drv_stat
)
3389 static void __ata_qc_complete(struct ata_queued_cmd
*qc
)
3391 struct ata_port
*ap
= qc
->ap
;
3392 unsigned int tag
, do_clear
= 0;
3396 if (likely(ata_tag_valid(tag
))) {
3397 if (tag
== ap
->active_tag
)
3398 ap
->active_tag
= ATA_TAG_POISON
;
3399 qc
->tag
= ATA_TAG_POISON
;
3404 struct completion
*waiting
= qc
->waiting
;
3409 if (likely(do_clear
))
3410 clear_bit(tag
, &ap
->qactive
);
3414 * ata_qc_free - free unused ata_queued_cmd
3415 * @qc: Command to complete
3417 * Designed to free unused ata_queued_cmd object
3418 * in case something prevents using it.
3421 * spin_lock_irqsave(host_set lock)
3423 void ata_qc_free(struct ata_queued_cmd
*qc
)
3425 assert(qc
!= NULL
); /* ata_qc_from_tag _might_ return NULL */
3426 assert(qc
->waiting
== NULL
); /* nothing should be waiting */
3428 __ata_qc_complete(qc
);
3432 * ata_qc_complete - Complete an active ATA command
3433 * @qc: Command to complete
3434 * @drv_stat: ATA Status register contents
3436 * Indicate to the mid and upper layers that an ATA
3437 * command has completed, with either an ok or not-ok status.
3440 * spin_lock_irqsave(host_set lock)
3443 void ata_qc_complete(struct ata_queued_cmd
*qc
, u8 drv_stat
)
3447 assert(qc
!= NULL
); /* ata_qc_from_tag _might_ return NULL */
3448 assert(qc
->flags
& ATA_QCFLAG_ACTIVE
);
3450 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3453 /* atapi: mark qc as inactive to prevent the interrupt handler
3454 * from completing the command twice later, before the error handler
3455 * is called. (when rc != 0 and atapi request sense is needed)
3457 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
3459 /* call completion callback */
3460 rc
= qc
->complete_fn(qc
, drv_stat
);
3462 /* if callback indicates not to complete command (non-zero),
3463 * return immediately
3468 __ata_qc_complete(qc
);
3473 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
3475 struct ata_port
*ap
= qc
->ap
;
3477 switch (qc
->tf
.protocol
) {
3479 case ATA_PROT_ATAPI_DMA
:
3482 case ATA_PROT_ATAPI
:
3484 case ATA_PROT_PIO_MULT
:
3485 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
3498 * ata_qc_issue - issue taskfile to device
3499 * @qc: command to issue to device
3501 * Prepare an ATA command to submission to device.
3502 * This includes mapping the data into a DMA-able
3503 * area, filling in the S/G table, and finally
3504 * writing the taskfile to hardware, starting the command.
3507 * spin_lock_irqsave(host_set lock)
3510 * Zero on success, negative on error.
3513 int ata_qc_issue(struct ata_queued_cmd
*qc
)
3515 struct ata_port
*ap
= qc
->ap
;
3517 if (ata_should_dma_map(qc
)) {
3518 if (qc
->flags
& ATA_QCFLAG_SG
) {
3519 if (ata_sg_setup(qc
))
3521 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
3522 if (ata_sg_setup_one(qc
))
3526 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3529 ap
->ops
->qc_prep(qc
);
3531 qc
->ap
->active_tag
= qc
->tag
;
3532 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
3534 return ap
->ops
->qc_issue(qc
);
3542 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
3543 * @qc: command to issue to device
3545 * Using various libata functions and hooks, this function
3546 * starts an ATA command. ATA commands are grouped into
3547 * classes called "protocols", and issuing each type of protocol
3548 * is slightly different.
3550 * May be used as the qc_issue() entry in ata_port_operations.
3553 * spin_lock_irqsave(host_set lock)
3556 * Zero on success, negative on error.
3559 int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
3561 struct ata_port
*ap
= qc
->ap
;
3563 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
3565 switch (qc
->tf
.protocol
) {
3566 case ATA_PROT_NODATA
:
3567 ata_tf_to_host_nolock(ap
, &qc
->tf
);
3571 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
3572 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
3573 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
3576 case ATA_PROT_PIO
: /* load tf registers, initiate polling pio */
3577 ata_qc_set_polling(qc
);
3578 ata_tf_to_host_nolock(ap
, &qc
->tf
);
3579 ap
->hsm_task_state
= HSM_ST
;
3580 queue_work(ata_wq
, &ap
->pio_task
);
3583 case ATA_PROT_ATAPI
:
3584 ata_qc_set_polling(qc
);
3585 ata_tf_to_host_nolock(ap
, &qc
->tf
);
3586 queue_work(ata_wq
, &ap
->packet_task
);
3589 case ATA_PROT_ATAPI_NODATA
:
3590 ap
->flags
|= ATA_FLAG_NOINTR
;
3591 ata_tf_to_host_nolock(ap
, &qc
->tf
);
3592 queue_work(ata_wq
, &ap
->packet_task
);
3595 case ATA_PROT_ATAPI_DMA
:
3596 ap
->flags
|= ATA_FLAG_NOINTR
;
3597 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
3598 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
3599 queue_work(ata_wq
, &ap
->packet_task
);
3611 * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
3612 * @qc: Info associated with this ATA transaction.
3615 * spin_lock_irqsave(host_set lock)
3618 static void ata_bmdma_setup_mmio (struct ata_queued_cmd
*qc
)
3620 struct ata_port
*ap
= qc
->ap
;
3621 unsigned int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3623 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3625 /* load PRD table addr. */
3626 mb(); /* make sure PRD table writes are visible to controller */
3627 writel(ap
->prd_dma
, mmio
+ ATA_DMA_TABLE_OFS
);
3629 /* specify data direction, triple-check start bit is clear */
3630 dmactl
= readb(mmio
+ ATA_DMA_CMD
);
3631 dmactl
&= ~(ATA_DMA_WR
| ATA_DMA_START
);
3633 dmactl
|= ATA_DMA_WR
;
3634 writeb(dmactl
, mmio
+ ATA_DMA_CMD
);
3636 /* issue r/w command */
3637 ap
->ops
->exec_command(ap
, &qc
->tf
);
3641 * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
3642 * @qc: Info associated with this ATA transaction.
3645 * spin_lock_irqsave(host_set lock)
3648 static void ata_bmdma_start_mmio (struct ata_queued_cmd
*qc
)
3650 struct ata_port
*ap
= qc
->ap
;
3651 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3654 /* start host DMA transaction */
3655 dmactl
= readb(mmio
+ ATA_DMA_CMD
);
3656 writeb(dmactl
| ATA_DMA_START
, mmio
+ ATA_DMA_CMD
);
3658 /* Strictly, one may wish to issue a readb() here, to
3659 * flush the mmio write. However, control also passes
3660 * to the hardware at this point, and it will interrupt
3661 * us when we are to resume control. So, in effect,
3662 * we don't care when the mmio write flushes.
3663 * Further, a read of the DMA status register _immediately_
3664 * following the write may not be what certain flaky hardware
3665 * is expected, so I think it is best to not add a readb()
3666 * without first all the MMIO ATA cards/mobos.
3667 * Or maybe I'm just being paranoid.
3672 * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO)
3673 * @qc: Info associated with this ATA transaction.
3676 * spin_lock_irqsave(host_set lock)
3679 static void ata_bmdma_setup_pio (struct ata_queued_cmd
*qc
)
3681 struct ata_port
*ap
= qc
->ap
;
3682 unsigned int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3685 /* load PRD table addr. */
3686 outl(ap
->prd_dma
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_TABLE_OFS
);
3688 /* specify data direction, triple-check start bit is clear */
3689 dmactl
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3690 dmactl
&= ~(ATA_DMA_WR
| ATA_DMA_START
);
3692 dmactl
|= ATA_DMA_WR
;
3693 outb(dmactl
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3695 /* issue r/w command */
3696 ap
->ops
->exec_command(ap
, &qc
->tf
);
3700 * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO)
3701 * @qc: Info associated with this ATA transaction.
3704 * spin_lock_irqsave(host_set lock)
3707 static void ata_bmdma_start_pio (struct ata_queued_cmd
*qc
)
3709 struct ata_port
*ap
= qc
->ap
;
3712 /* start host DMA transaction */
3713 dmactl
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3714 outb(dmactl
| ATA_DMA_START
,
3715 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3720 * ata_bmdma_start - Start a PCI IDE BMDMA transaction
3721 * @qc: Info associated with this ATA transaction.
3723 * Writes the ATA_DMA_START flag to the DMA command register.
3725 * May be used as the bmdma_start() entry in ata_port_operations.
3728 * spin_lock_irqsave(host_set lock)
3730 void ata_bmdma_start(struct ata_queued_cmd
*qc
)
3732 if (qc
->ap
->flags
& ATA_FLAG_MMIO
)
3733 ata_bmdma_start_mmio(qc
);
3735 ata_bmdma_start_pio(qc
);
3740 * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
3741 * @qc: Info associated with this ATA transaction.
3743 * Writes address of PRD table to device's PRD Table Address
3744 * register, sets the DMA control register, and calls
3745 * ops->exec_command() to start the transfer.
3747 * May be used as the bmdma_setup() entry in ata_port_operations.
3750 * spin_lock_irqsave(host_set lock)
3752 void ata_bmdma_setup(struct ata_queued_cmd
*qc
)
3754 if (qc
->ap
->flags
& ATA_FLAG_MMIO
)
3755 ata_bmdma_setup_mmio(qc
);
3757 ata_bmdma_setup_pio(qc
);
3762 * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
3763 * @ap: Port associated with this ATA transaction.
3765 * Clear interrupt and error flags in DMA status register.
3767 * May be used as the irq_clear() entry in ata_port_operations.
3770 * spin_lock_irqsave(host_set lock)
3773 void ata_bmdma_irq_clear(struct ata_port
*ap
)
3775 if (ap
->flags
& ATA_FLAG_MMIO
) {
3776 void __iomem
*mmio
= ((void __iomem
*) ap
->ioaddr
.bmdma_addr
) + ATA_DMA_STATUS
;
3777 writeb(readb(mmio
), mmio
);
3779 unsigned long addr
= ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
;
3780 outb(inb(addr
), addr
);
3787 * ata_bmdma_status - Read PCI IDE BMDMA status
3788 * @ap: Port associated with this ATA transaction.
3790 * Read and return BMDMA status register.
3792 * May be used as the bmdma_status() entry in ata_port_operations.
3795 * spin_lock_irqsave(host_set lock)
3798 u8
ata_bmdma_status(struct ata_port
*ap
)
3801 if (ap
->flags
& ATA_FLAG_MMIO
) {
3802 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3803 host_stat
= readb(mmio
+ ATA_DMA_STATUS
);
3805 host_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
3811 * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
3812 * @qc: Command we are ending DMA for
3814 * Clears the ATA_DMA_START flag in the dma control register
3816 * May be used as the bmdma_stop() entry in ata_port_operations.
3819 * spin_lock_irqsave(host_set lock)
3822 void ata_bmdma_stop(struct ata_queued_cmd
*qc
)
3824 struct ata_port
*ap
= qc
->ap
;
3825 if (ap
->flags
& ATA_FLAG_MMIO
) {
3826 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3828 /* clear start/stop bit */
3829 writeb(readb(mmio
+ ATA_DMA_CMD
) & ~ATA_DMA_START
,
3830 mmio
+ ATA_DMA_CMD
);
3832 /* clear start/stop bit */
3833 outb(inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
) & ~ATA_DMA_START
,
3834 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3837 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
3838 ata_altstatus(ap
); /* dummy read */
3842 * ata_host_intr - Handle host interrupt for given (port, task)
3843 * @ap: Port on which interrupt arrived (possibly...)
3844 * @qc: Taskfile currently active in engine
3846 * Handle host interrupt for given queued command. Currently,
3847 * only DMA interrupts are handled. All other commands are
3848 * handled via polling with interrupts disabled (nIEN bit).
3851 * spin_lock_irqsave(host_set lock)
3854 * One if interrupt was handled, zero if not (shared irq).
3857 inline unsigned int ata_host_intr (struct ata_port
*ap
,
3858 struct ata_queued_cmd
*qc
)
3860 u8 status
, host_stat
;
3862 switch (qc
->tf
.protocol
) {
3865 case ATA_PROT_ATAPI_DMA
:
3866 case ATA_PROT_ATAPI
:
3867 /* check status of DMA engine */
3868 host_stat
= ap
->ops
->bmdma_status(ap
);
3869 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
3871 /* if it's not our irq... */
3872 if (!(host_stat
& ATA_DMA_INTR
))
3875 /* before we do anything else, clear DMA-Start bit */
3876 ap
->ops
->bmdma_stop(qc
);
3880 case ATA_PROT_ATAPI_NODATA
:
3881 case ATA_PROT_NODATA
:
3882 /* check altstatus */
3883 status
= ata_altstatus(ap
);
3884 if (status
& ATA_BUSY
)
3887 /* check main status, clearing INTRQ */
3888 status
= ata_chk_status(ap
);
3889 if (unlikely(status
& ATA_BUSY
))
3891 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
3892 ap
->id
, qc
->tf
.protocol
, status
);
3894 /* ack bmdma irq events */
3895 ap
->ops
->irq_clear(ap
);
3897 /* complete taskfile transaction */
3898 ata_qc_complete(qc
, status
);
3905 return 1; /* irq handled */
3908 ap
->stats
.idle_irq
++;
3911 if ((ap
->stats
.idle_irq
% 1000) == 0) {
3913 ata_irq_ack(ap
, 0); /* debug trap */
3914 printk(KERN_WARNING
"ata%d: irq trap\n", ap
->id
);
3917 return 0; /* irq not handled */
3921 * ata_interrupt - Default ATA host interrupt handler
3922 * @irq: irq line (unused)
3923 * @dev_instance: pointer to our ata_host_set information structure
3926 * Default interrupt handler for PCI IDE devices. Calls
3927 * ata_host_intr() for each port that is not disabled.
3930 * Obtains host_set lock during operation.
3933 * IRQ_NONE or IRQ_HANDLED.
3936 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
3938 struct ata_host_set
*host_set
= dev_instance
;
3940 unsigned int handled
= 0;
3941 unsigned long flags
;
3943 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
3944 spin_lock_irqsave(&host_set
->lock
, flags
);
3946 for (i
= 0; i
< host_set
->n_ports
; i
++) {
3947 struct ata_port
*ap
;
3949 ap
= host_set
->ports
[i
];
3951 !(ap
->flags
& (ATA_FLAG_PORT_DISABLED
| ATA_FLAG_NOINTR
))) {
3952 struct ata_queued_cmd
*qc
;
3954 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3955 if (qc
&& (!(qc
->tf
.ctl
& ATA_NIEN
)) &&
3956 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
3957 handled
|= ata_host_intr(ap
, qc
);
3961 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3963 return IRQ_RETVAL(handled
);
3967 * atapi_packet_task - Write CDB bytes to hardware
3968 * @_data: Port to which ATAPI device is attached.
3970 * When device has indicated its readiness to accept
3971 * a CDB, this function is called. Send the CDB.
3972 * If DMA is to be performed, exit immediately.
3973 * Otherwise, we are in polling mode, so poll
3974 * status under operation succeeds or fails.
3977 * Kernel thread context (may sleep)
3980 static void atapi_packet_task(void *_data
)
3982 struct ata_port
*ap
= _data
;
3983 struct ata_queued_cmd
*qc
;
3986 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3988 assert(qc
->flags
& ATA_QCFLAG_ACTIVE
);
3990 /* sleep-wait for BSY to clear */
3991 DPRINTK("busy wait\n");
3992 if (ata_busy_sleep(ap
, ATA_TMOUT_CDB_QUICK
, ATA_TMOUT_CDB
))
3995 /* make sure DRQ is set */
3996 status
= ata_chk_status(ap
);
3997 if ((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
)
4001 DPRINTK("send cdb\n");
4002 assert(ap
->cdb_len
>= 12);
4004 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
||
4005 qc
->tf
.protocol
== ATA_PROT_ATAPI_NODATA
) {
4006 unsigned long flags
;
4008 /* Once we're done issuing command and kicking bmdma,
4009 * irq handler takes over. To not lose irq, we need
4010 * to clear NOINTR flag before sending cdb, but
4011 * interrupt handler shouldn't be invoked before we're
4012 * finished. Hence, the following locking.
4014 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
4015 ap
->flags
&= ~ATA_FLAG_NOINTR
;
4016 ata_data_xfer(ap
, qc
->cdb
, ap
->cdb_len
, 1);
4017 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
)
4018 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4019 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
4021 ata_data_xfer(ap
, qc
->cdb
, ap
->cdb_len
, 1);
4023 /* PIO commands are handled by polling */
4024 ap
->hsm_task_state
= HSM_ST
;
4025 queue_work(ata_wq
, &ap
->pio_task
);
4031 ata_poll_qc_complete(qc
, ATA_ERR
);
4036 * ata_port_start - Set port up for dma.
4037 * @ap: Port to initialize
4039 * Called just after data structures for each port are
4040 * initialized. Allocates space for PRD table.
4042 * May be used as the port_start() entry in ata_port_operations.
4045 * Inherited from caller.
4048 int ata_port_start (struct ata_port
*ap
)
4050 struct device
*dev
= ap
->host_set
->dev
;
4052 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
4056 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
4063 * ata_port_stop - Undo ata_port_start()
4064 * @ap: Port to shut down
4066 * Frees the PRD table.
4068 * May be used as the port_stop() entry in ata_port_operations.
4071 * Inherited from caller.
4074 void ata_port_stop (struct ata_port
*ap
)
4076 struct device
*dev
= ap
->host_set
->dev
;
4078 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4081 void ata_host_stop (struct ata_host_set
*host_set
)
4083 if (host_set
->mmio_base
)
4084 iounmap(host_set
->mmio_base
);
4089 * ata_host_remove - Unregister SCSI host structure with upper layers
4090 * @ap: Port to unregister
4091 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4094 * Inherited from caller.
4097 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
4099 struct Scsi_Host
*sh
= ap
->host
;
4104 scsi_remove_host(sh
);
4106 ap
->ops
->port_stop(ap
);
4110 * ata_host_init - Initialize an ata_port structure
4111 * @ap: Structure to initialize
4112 * @host: associated SCSI mid-layer structure
4113 * @host_set: Collection of hosts to which @ap belongs
4114 * @ent: Probe information provided by low-level driver
4115 * @port_no: Port number associated with this ata_port
4117 * Initialize a new ata_port structure, and its associated
4121 * Inherited from caller.
4124 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
4125 struct ata_host_set
*host_set
,
4126 const struct ata_probe_ent
*ent
, unsigned int port_no
)
4132 host
->max_channel
= 1;
4133 host
->unique_id
= ata_unique_id
++;
4134 host
->max_cmd_len
= 12;
4136 scsi_assign_lock(host
, &host_set
->lock
);
4138 ap
->flags
= ATA_FLAG_PORT_DISABLED
;
4139 ap
->id
= host
->unique_id
;
4141 ap
->ctl
= ATA_DEVCTL_OBS
;
4142 ap
->host_set
= host_set
;
4143 ap
->port_no
= port_no
;
4145 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
4146 ap
->pio_mask
= ent
->pio_mask
;
4147 ap
->mwdma_mask
= ent
->mwdma_mask
;
4148 ap
->udma_mask
= ent
->udma_mask
;
4149 ap
->flags
|= ent
->host_flags
;
4150 ap
->ops
= ent
->port_ops
;
4151 ap
->cbl
= ATA_CBL_NONE
;
4152 ap
->active_tag
= ATA_TAG_POISON
;
4153 ap
->last_ctl
= 0xFF;
4155 INIT_WORK(&ap
->packet_task
, atapi_packet_task
, ap
);
4156 INIT_WORK(&ap
->pio_task
, ata_pio_task
, ap
);
4158 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4159 ap
->device
[i
].devno
= i
;
4162 ap
->stats
.unhandled_irq
= 1;
4163 ap
->stats
.idle_irq
= 1;
4166 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
4170 * ata_host_add - Attach low-level ATA driver to system
4171 * @ent: Information provided by low-level driver
4172 * @host_set: Collections of ports to which we add
4173 * @port_no: Port number associated with this host
4175 * Attach low-level ATA driver to system.
4178 * PCI/etc. bus probe sem.
4181 * New ata_port on success, for NULL on error.
4184 static struct ata_port
* ata_host_add(const struct ata_probe_ent
*ent
,
4185 struct ata_host_set
*host_set
,
4186 unsigned int port_no
)
4188 struct Scsi_Host
*host
;
4189 struct ata_port
*ap
;
4193 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
4197 ap
= (struct ata_port
*) &host
->hostdata
[0];
4199 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
4201 rc
= ap
->ops
->port_start(ap
);
4208 scsi_host_put(host
);
4213 * ata_device_add - Register hardware device with ATA and SCSI layers
4214 * @ent: Probe information describing hardware device to be registered
4216 * This function processes the information provided in the probe
4217 * information struct @ent, allocates the necessary ATA and SCSI
4218 * host information structures, initializes them, and registers
4219 * everything with requisite kernel subsystems.
4221 * This function requests irqs, probes the ATA bus, and probes
4225 * PCI/etc. bus probe sem.
4228 * Number of ports registered. Zero on error (no ports registered).
4231 int ata_device_add(const struct ata_probe_ent
*ent
)
4233 unsigned int count
= 0, i
;
4234 struct device
*dev
= ent
->dev
;
4235 struct ata_host_set
*host_set
;
4238 /* alloc a container for our list of ATA ports (buses) */
4239 host_set
= kzalloc(sizeof(struct ata_host_set
) +
4240 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
4243 spin_lock_init(&host_set
->lock
);
4245 host_set
->dev
= dev
;
4246 host_set
->n_ports
= ent
->n_ports
;
4247 host_set
->irq
= ent
->irq
;
4248 host_set
->mmio_base
= ent
->mmio_base
;
4249 host_set
->private_data
= ent
->private_data
;
4250 host_set
->ops
= ent
->port_ops
;
4252 /* register each port bound to this device */
4253 for (i
= 0; i
< ent
->n_ports
; i
++) {
4254 struct ata_port
*ap
;
4255 unsigned long xfer_mode_mask
;
4257 ap
= ata_host_add(ent
, host_set
, i
);
4261 host_set
->ports
[i
] = ap
;
4262 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
4263 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
4264 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
4266 /* print per-port info to dmesg */
4267 printk(KERN_INFO
"ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4268 "bmdma 0x%lX irq %lu\n",
4270 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
4271 ata_mode_string(xfer_mode_mask
),
4272 ap
->ioaddr
.cmd_addr
,
4273 ap
->ioaddr
.ctl_addr
,
4274 ap
->ioaddr
.bmdma_addr
,
4278 host_set
->ops
->irq_clear(ap
);
4285 /* obtain irq, that is shared between channels */
4286 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
4287 DRV_NAME
, host_set
))
4290 /* perform each probe synchronously */
4291 DPRINTK("probe begin\n");
4292 for (i
= 0; i
< count
; i
++) {
4293 struct ata_port
*ap
;
4296 ap
= host_set
->ports
[i
];
4298 DPRINTK("ata%u: probe begin\n", ap
->id
);
4299 rc
= ata_bus_probe(ap
);
4300 DPRINTK("ata%u: probe end\n", ap
->id
);
4303 /* FIXME: do something useful here?
4304 * Current libata behavior will
4305 * tear down everything when
4306 * the module is removed
4307 * or the h/w is unplugged.
4311 rc
= scsi_add_host(ap
->host
, dev
);
4313 printk(KERN_ERR
"ata%u: scsi_add_host failed\n",
4315 /* FIXME: do something useful here */
4316 /* FIXME: handle unconditional calls to
4317 * scsi_scan_host and ata_host_remove, below,
4323 /* probes are done, now scan each port's disk(s) */
4324 DPRINTK("probe begin\n");
4325 for (i
= 0; i
< count
; i
++) {
4326 struct ata_port
*ap
= host_set
->ports
[i
];
4328 ata_scsi_scan_host(ap
);
4331 dev_set_drvdata(dev
, host_set
);
4333 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
4334 return ent
->n_ports
; /* success */
4337 for (i
= 0; i
< count
; i
++) {
4338 ata_host_remove(host_set
->ports
[i
], 1);
4339 scsi_host_put(host_set
->ports
[i
]->host
);
4343 VPRINTK("EXIT, returning 0\n");
4348 * ata_host_set_remove - PCI layer callback for device removal
4349 * @host_set: ATA host set that was removed
4351 * Unregister all objects associated with this host set. Free those
4355 * Inherited from calling layer (may sleep).
4358 void ata_host_set_remove(struct ata_host_set
*host_set
)
4360 struct ata_port
*ap
;
4363 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4364 ap
= host_set
->ports
[i
];
4365 scsi_remove_host(ap
->host
);
4368 free_irq(host_set
->irq
, host_set
);
4370 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4371 ap
= host_set
->ports
[i
];
4373 ata_scsi_release(ap
->host
);
4375 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
4376 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
4378 if (ioaddr
->cmd_addr
== 0x1f0)
4379 release_region(0x1f0, 8);
4380 else if (ioaddr
->cmd_addr
== 0x170)
4381 release_region(0x170, 8);
4384 scsi_host_put(ap
->host
);
4387 if (host_set
->ops
->host_stop
)
4388 host_set
->ops
->host_stop(host_set
);
4394 * ata_scsi_release - SCSI layer callback hook for host unload
4395 * @host: libata host to be unloaded
4397 * Performs all duties necessary to shut down a libata port...
4398 * Kill port kthread, disable port, and release resources.
4401 * Inherited from SCSI layer.
4407 int ata_scsi_release(struct Scsi_Host
*host
)
4409 struct ata_port
*ap
= (struct ata_port
*) &host
->hostdata
[0];
4413 ap
->ops
->port_disable(ap
);
4414 ata_host_remove(ap
, 0);
4421 * ata_std_ports - initialize ioaddr with standard port offsets.
4422 * @ioaddr: IO address structure to be initialized
4424 * Utility function which initializes data_addr, error_addr,
4425 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4426 * device_addr, status_addr, and command_addr to standard offsets
4427 * relative to cmd_addr.
4429 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
4432 void ata_std_ports(struct ata_ioports
*ioaddr
)
4434 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
4435 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
4436 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
4437 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
4438 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
4439 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
4440 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
4441 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
4442 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
4443 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
4446 static struct ata_probe_ent
*
4447 ata_probe_ent_alloc(struct device
*dev
, const struct ata_port_info
*port
)
4449 struct ata_probe_ent
*probe_ent
;
4451 probe_ent
= kzalloc(sizeof(*probe_ent
), GFP_KERNEL
);
4453 printk(KERN_ERR DRV_NAME
"(%s): out of memory\n",
4454 kobject_name(&(dev
->kobj
)));
4458 INIT_LIST_HEAD(&probe_ent
->node
);
4459 probe_ent
->dev
= dev
;
4461 probe_ent
->sht
= port
->sht
;
4462 probe_ent
->host_flags
= port
->host_flags
;
4463 probe_ent
->pio_mask
= port
->pio_mask
;
4464 probe_ent
->mwdma_mask
= port
->mwdma_mask
;
4465 probe_ent
->udma_mask
= port
->udma_mask
;
4466 probe_ent
->port_ops
= port
->port_ops
;
4475 void ata_pci_host_stop (struct ata_host_set
*host_set
)
4477 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
4479 pci_iounmap(pdev
, host_set
->mmio_base
);
4483 * ata_pci_init_native_mode - Initialize native-mode driver
4484 * @pdev: pci device to be initialized
4485 * @port: array[2] of pointers to port info structures.
4486 * @ports: bitmap of ports present
4488 * Utility function which allocates and initializes an
4489 * ata_probe_ent structure for a standard dual-port
4490 * PIO-based IDE controller. The returned ata_probe_ent
4491 * structure can be passed to ata_device_add(). The returned
4492 * ata_probe_ent structure should then be freed with kfree().
4494 * The caller need only pass the address of the primary port, the
4495 * secondary will be deduced automatically. If the device has non
4496 * standard secondary port mappings this function can be called twice,
4497 * once for each interface.
4500 struct ata_probe_ent
*
4501 ata_pci_init_native_mode(struct pci_dev
*pdev
, struct ata_port_info
**port
, int ports
)
4503 struct ata_probe_ent
*probe_ent
=
4504 ata_probe_ent_alloc(pci_dev_to_dev(pdev
), port
[0]);
4510 probe_ent
->irq
= pdev
->irq
;
4511 probe_ent
->irq_flags
= SA_SHIRQ
;
4513 if (ports
& ATA_PORT_PRIMARY
) {
4514 probe_ent
->port
[p
].cmd_addr
= pci_resource_start(pdev
, 0);
4515 probe_ent
->port
[p
].altstatus_addr
=
4516 probe_ent
->port
[p
].ctl_addr
=
4517 pci_resource_start(pdev
, 1) | ATA_PCI_CTL_OFS
;
4518 probe_ent
->port
[p
].bmdma_addr
= pci_resource_start(pdev
, 4);
4519 ata_std_ports(&probe_ent
->port
[p
]);
4523 if (ports
& ATA_PORT_SECONDARY
) {
4524 probe_ent
->port
[p
].cmd_addr
= pci_resource_start(pdev
, 2);
4525 probe_ent
->port
[p
].altstatus_addr
=
4526 probe_ent
->port
[p
].ctl_addr
=
4527 pci_resource_start(pdev
, 3) | ATA_PCI_CTL_OFS
;
4528 probe_ent
->port
[p
].bmdma_addr
= pci_resource_start(pdev
, 4) + 8;
4529 ata_std_ports(&probe_ent
->port
[p
]);
4533 probe_ent
->n_ports
= p
;
4537 static struct ata_probe_ent
*ata_pci_init_legacy_port(struct pci_dev
*pdev
, struct ata_port_info
**port
, int port_num
)
4539 struct ata_probe_ent
*probe_ent
;
4541 probe_ent
= ata_probe_ent_alloc(pci_dev_to_dev(pdev
), port
[0]);
4545 probe_ent
->legacy_mode
= 1;
4546 probe_ent
->n_ports
= 1;
4547 probe_ent
->hard_port_no
= port_num
;
4552 probe_ent
->irq
= 14;
4553 probe_ent
->port
[0].cmd_addr
= 0x1f0;
4554 probe_ent
->port
[0].altstatus_addr
=
4555 probe_ent
->port
[0].ctl_addr
= 0x3f6;
4558 probe_ent
->irq
= 15;
4559 probe_ent
->port
[0].cmd_addr
= 0x170;
4560 probe_ent
->port
[0].altstatus_addr
=
4561 probe_ent
->port
[0].ctl_addr
= 0x376;
4564 probe_ent
->port
[0].bmdma_addr
= pci_resource_start(pdev
, 4) + 8 * port_num
;
4565 ata_std_ports(&probe_ent
->port
[0]);
4570 * ata_pci_init_one - Initialize/register PCI IDE host controller
4571 * @pdev: Controller to be initialized
4572 * @port_info: Information from low-level host driver
4573 * @n_ports: Number of ports attached to host controller
4575 * This is a helper function which can be called from a driver's
4576 * xxx_init_one() probe function if the hardware uses traditional
4577 * IDE taskfile registers.
4579 * This function calls pci_enable_device(), reserves its register
4580 * regions, sets the dma mask, enables bus master mode, and calls
4584 * Inherited from PCI layer (may sleep).
4587 * Zero on success, negative on errno-based value on error.
4590 int ata_pci_init_one (struct pci_dev
*pdev
, struct ata_port_info
**port_info
,
4591 unsigned int n_ports
)
4593 struct ata_probe_ent
*probe_ent
= NULL
, *probe_ent2
= NULL
;
4594 struct ata_port_info
*port
[2];
4596 unsigned int legacy_mode
= 0;
4597 int disable_dev_on_err
= 1;
4602 port
[0] = port_info
[0];
4604 port
[1] = port_info
[1];
4608 if ((port
[0]->host_flags
& ATA_FLAG_NO_LEGACY
) == 0
4609 && (pdev
->class >> 8) == PCI_CLASS_STORAGE_IDE
) {
4610 /* TODO: What if one channel is in native mode ... */
4611 pci_read_config_byte(pdev
, PCI_CLASS_PROG
, &tmp8
);
4612 mask
= (1 << 2) | (1 << 0);
4613 if ((tmp8
& mask
) != mask
)
4614 legacy_mode
= (1 << 3);
4618 if ((!legacy_mode
) && (n_ports
> 2)) {
4619 printk(KERN_ERR
"ata: BUG: native mode, n_ports > 2\n");
4624 /* FIXME: Really for ATA it isn't safe because the device may be
4625 multi-purpose and we want to leave it alone if it was already
4626 enabled. Secondly for shared use as Arjan says we want refcounting
4628 Checking dev->is_enabled is insufficient as this is not set at
4629 boot for the primary video which is BIOS enabled
4632 rc
= pci_enable_device(pdev
);
4636 rc
= pci_request_regions(pdev
, DRV_NAME
);
4638 disable_dev_on_err
= 0;
4642 /* FIXME: Should use platform specific mappers for legacy port ranges */
4644 if (!request_region(0x1f0, 8, "libata")) {
4645 struct resource
*conflict
, res
;
4647 res
.end
= 0x1f0 + 8 - 1;
4648 conflict
= ____request_resource(&ioport_resource
, &res
);
4649 if (!strcmp(conflict
->name
, "libata"))
4650 legacy_mode
|= (1 << 0);
4652 disable_dev_on_err
= 0;
4653 printk(KERN_WARNING
"ata: 0x1f0 IDE port busy\n");
4656 legacy_mode
|= (1 << 0);
4658 if (!request_region(0x170, 8, "libata")) {
4659 struct resource
*conflict
, res
;
4661 res
.end
= 0x170 + 8 - 1;
4662 conflict
= ____request_resource(&ioport_resource
, &res
);
4663 if (!strcmp(conflict
->name
, "libata"))
4664 legacy_mode
|= (1 << 1);
4666 disable_dev_on_err
= 0;
4667 printk(KERN_WARNING
"ata: 0x170 IDE port busy\n");
4670 legacy_mode
|= (1 << 1);
4673 /* we have legacy mode, but all ports are unavailable */
4674 if (legacy_mode
== (1 << 3)) {
4676 goto err_out_regions
;
4679 rc
= pci_set_dma_mask(pdev
, ATA_DMA_MASK
);
4681 goto err_out_regions
;
4682 rc
= pci_set_consistent_dma_mask(pdev
, ATA_DMA_MASK
);
4684 goto err_out_regions
;
4687 if (legacy_mode
& (1 << 0))
4688 probe_ent
= ata_pci_init_legacy_port(pdev
, port
, 0);
4689 if (legacy_mode
& (1 << 1))
4690 probe_ent2
= ata_pci_init_legacy_port(pdev
, port
, 1);
4693 probe_ent
= ata_pci_init_native_mode(pdev
, port
, ATA_PORT_PRIMARY
| ATA_PORT_SECONDARY
);
4695 probe_ent
= ata_pci_init_native_mode(pdev
, port
, ATA_PORT_PRIMARY
);
4697 if (!probe_ent
&& !probe_ent2
) {
4699 goto err_out_regions
;
4702 pci_set_master(pdev
);
4704 /* FIXME: check ata_device_add return */
4706 if (legacy_mode
& (1 << 0))
4707 ata_device_add(probe_ent
);
4708 if (legacy_mode
& (1 << 1))
4709 ata_device_add(probe_ent2
);
4711 ata_device_add(probe_ent
);
4719 if (legacy_mode
& (1 << 0))
4720 release_region(0x1f0, 8);
4721 if (legacy_mode
& (1 << 1))
4722 release_region(0x170, 8);
4723 pci_release_regions(pdev
);
4725 if (disable_dev_on_err
)
4726 pci_disable_device(pdev
);
4731 * ata_pci_remove_one - PCI layer callback for device removal
4732 * @pdev: PCI device that was removed
4734 * PCI layer indicates to libata via this hook that
4735 * hot-unplug or module unload event has occurred.
4736 * Handle this by unregistering all objects associated
4737 * with this PCI device. Free those objects. Then finally
4738 * release PCI resources and disable device.
4741 * Inherited from PCI layer (may sleep).
4744 void ata_pci_remove_one (struct pci_dev
*pdev
)
4746 struct device
*dev
= pci_dev_to_dev(pdev
);
4747 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
4749 ata_host_set_remove(host_set
);
4750 pci_release_regions(pdev
);
4751 pci_disable_device(pdev
);
4752 dev_set_drvdata(dev
, NULL
);
4755 /* move to PCI subsystem */
4756 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
4758 unsigned long tmp
= 0;
4760 switch (bits
->width
) {
4763 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
4769 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
4775 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
4786 return (tmp
== bits
->val
) ? 1 : 0;
4788 #endif /* CONFIG_PCI */
4791 static int __init
ata_init(void)
4793 ata_wq
= create_workqueue("ata");
4797 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
4801 static void __exit
ata_exit(void)
4803 destroy_workqueue(ata_wq
);
4806 module_init(ata_init
);
4807 module_exit(ata_exit
);
4809 static unsigned long ratelimit_time
;
4810 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
4812 int ata_ratelimit(void)
4815 unsigned long flags
;
4817 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
4819 if (time_after(jiffies
, ratelimit_time
)) {
4821 ratelimit_time
= jiffies
+ (HZ
/5);
4825 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
4831 * libata is essentially a library of internal helper functions for
4832 * low-level ATA host controller drivers. As such, the API/ABI is
4833 * likely to change as new drivers are added and updated.
4834 * Do not depend on ABI/API stability.
4837 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
4838 EXPORT_SYMBOL_GPL(ata_std_ports
);
4839 EXPORT_SYMBOL_GPL(ata_device_add
);
4840 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
4841 EXPORT_SYMBOL_GPL(ata_sg_init
);
4842 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
4843 EXPORT_SYMBOL_GPL(ata_qc_complete
);
4844 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
4845 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
4846 EXPORT_SYMBOL_GPL(ata_tf_load
);
4847 EXPORT_SYMBOL_GPL(ata_tf_read
);
4848 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
4849 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
4850 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
4851 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
4852 EXPORT_SYMBOL_GPL(ata_check_status
);
4853 EXPORT_SYMBOL_GPL(ata_altstatus
);
4854 EXPORT_SYMBOL_GPL(ata_exec_command
);
4855 EXPORT_SYMBOL_GPL(ata_port_start
);
4856 EXPORT_SYMBOL_GPL(ata_port_stop
);
4857 EXPORT_SYMBOL_GPL(ata_host_stop
);
4858 EXPORT_SYMBOL_GPL(ata_interrupt
);
4859 EXPORT_SYMBOL_GPL(ata_qc_prep
);
4860 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
4861 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
4862 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
4863 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
4864 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
4865 EXPORT_SYMBOL_GPL(ata_port_probe
);
4866 EXPORT_SYMBOL_GPL(sata_phy_reset
);
4867 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
4868 EXPORT_SYMBOL_GPL(ata_bus_reset
);
4869 EXPORT_SYMBOL_GPL(ata_port_disable
);
4870 EXPORT_SYMBOL_GPL(ata_ratelimit
);
4871 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
4872 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
4873 EXPORT_SYMBOL_GPL(ata_scsi_error
);
4874 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
4875 EXPORT_SYMBOL_GPL(ata_scsi_release
);
4876 EXPORT_SYMBOL_GPL(ata_host_intr
);
4877 EXPORT_SYMBOL_GPL(ata_dev_classify
);
4878 EXPORT_SYMBOL_GPL(ata_dev_id_string
);
4879 EXPORT_SYMBOL_GPL(ata_dev_config
);
4880 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
4882 EXPORT_SYMBOL_GPL(ata_timing_compute
);
4883 EXPORT_SYMBOL_GPL(ata_timing_merge
);
4886 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
4887 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
4888 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
4889 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
4890 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
4891 #endif /* CONFIG_PCI */