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 <linux/scatterlist.h>
53 #include <scsi/scsi.h>
54 #include "scsi_priv.h"
55 #include <scsi/scsi_cmnd.h>
56 #include <scsi/scsi_host.h>
57 #include <linux/libata.h>
59 #include <asm/semaphore.h>
60 #include <asm/byteorder.h>
64 static void ata_dev_reread_id(struct ata_port
*ap
, struct ata_device
*dev
);
65 static void ata_dev_init_params(struct ata_port
*ap
, struct ata_device
*dev
);
66 static void ata_set_mode(struct ata_port
*ap
);
67 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
);
68 static unsigned int ata_get_mode_mask(const struct ata_port
*ap
, int shift
);
69 static int fgb(u32 bitmap
);
70 static int ata_choose_xfer_mode(const struct ata_port
*ap
,
72 unsigned int *xfer_shift_out
);
74 static unsigned int ata_unique_id
= 1;
75 static struct workqueue_struct
*ata_wq
;
77 int atapi_enabled
= 0;
78 module_param(atapi_enabled
, int, 0444);
79 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
81 MODULE_AUTHOR("Jeff Garzik");
82 MODULE_DESCRIPTION("Library module for ATA devices");
83 MODULE_LICENSE("GPL");
84 MODULE_VERSION(DRV_VERSION
);
87 * ata_tf_load_pio - send taskfile registers to host controller
88 * @ap: Port to which output is sent
89 * @tf: ATA taskfile register set
91 * Outputs ATA taskfile to standard ATA host controller.
94 * Inherited from caller.
97 static void ata_tf_load_pio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
99 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
100 unsigned int is_addr
= tf
->flags
& ATA_TFLAG_ISADDR
;
102 if (tf
->ctl
!= ap
->last_ctl
) {
103 outb(tf
->ctl
, ioaddr
->ctl_addr
);
104 ap
->last_ctl
= tf
->ctl
;
108 if (is_addr
&& (tf
->flags
& ATA_TFLAG_LBA48
)) {
109 outb(tf
->hob_feature
, ioaddr
->feature_addr
);
110 outb(tf
->hob_nsect
, ioaddr
->nsect_addr
);
111 outb(tf
->hob_lbal
, ioaddr
->lbal_addr
);
112 outb(tf
->hob_lbam
, ioaddr
->lbam_addr
);
113 outb(tf
->hob_lbah
, ioaddr
->lbah_addr
);
114 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
123 outb(tf
->feature
, ioaddr
->feature_addr
);
124 outb(tf
->nsect
, ioaddr
->nsect_addr
);
125 outb(tf
->lbal
, ioaddr
->lbal_addr
);
126 outb(tf
->lbam
, ioaddr
->lbam_addr
);
127 outb(tf
->lbah
, ioaddr
->lbah_addr
);
128 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
136 if (tf
->flags
& ATA_TFLAG_DEVICE
) {
137 outb(tf
->device
, ioaddr
->device_addr
);
138 VPRINTK("device 0x%X\n", tf
->device
);
145 * ata_tf_load_mmio - send taskfile registers to host controller
146 * @ap: Port to which output is sent
147 * @tf: ATA taskfile register set
149 * Outputs ATA taskfile to standard ATA host controller using MMIO.
152 * Inherited from caller.
155 static void ata_tf_load_mmio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
157 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
158 unsigned int is_addr
= tf
->flags
& ATA_TFLAG_ISADDR
;
160 if (tf
->ctl
!= ap
->last_ctl
) {
161 writeb(tf
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
162 ap
->last_ctl
= tf
->ctl
;
166 if (is_addr
&& (tf
->flags
& ATA_TFLAG_LBA48
)) {
167 writeb(tf
->hob_feature
, (void __iomem
*) ioaddr
->feature_addr
);
168 writeb(tf
->hob_nsect
, (void __iomem
*) ioaddr
->nsect_addr
);
169 writeb(tf
->hob_lbal
, (void __iomem
*) ioaddr
->lbal_addr
);
170 writeb(tf
->hob_lbam
, (void __iomem
*) ioaddr
->lbam_addr
);
171 writeb(tf
->hob_lbah
, (void __iomem
*) ioaddr
->lbah_addr
);
172 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
181 writeb(tf
->feature
, (void __iomem
*) ioaddr
->feature_addr
);
182 writeb(tf
->nsect
, (void __iomem
*) ioaddr
->nsect_addr
);
183 writeb(tf
->lbal
, (void __iomem
*) ioaddr
->lbal_addr
);
184 writeb(tf
->lbam
, (void __iomem
*) ioaddr
->lbam_addr
);
185 writeb(tf
->lbah
, (void __iomem
*) ioaddr
->lbah_addr
);
186 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
194 if (tf
->flags
& ATA_TFLAG_DEVICE
) {
195 writeb(tf
->device
, (void __iomem
*) ioaddr
->device_addr
);
196 VPRINTK("device 0x%X\n", tf
->device
);
204 * ata_tf_load - send taskfile registers to host controller
205 * @ap: Port to which output is sent
206 * @tf: ATA taskfile register set
208 * Outputs ATA taskfile to standard ATA host controller using MMIO
209 * or PIO as indicated by the ATA_FLAG_MMIO flag.
210 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
211 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
212 * hob_lbal, hob_lbam, and hob_lbah.
214 * This function waits for idle (!BUSY and !DRQ) after writing
215 * registers. If the control register has a new value, this
216 * function also waits for idle after writing control and before
217 * writing the remaining registers.
219 * May be used as the tf_load() entry in ata_port_operations.
222 * Inherited from caller.
224 void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
226 if (ap
->flags
& ATA_FLAG_MMIO
)
227 ata_tf_load_mmio(ap
, tf
);
229 ata_tf_load_pio(ap
, tf
);
233 * ata_exec_command_pio - issue ATA command to host controller
234 * @ap: port to which command is being issued
235 * @tf: ATA taskfile register set
237 * Issues PIO write to ATA command register, with proper
238 * synchronization with interrupt handler / other threads.
241 * spin_lock_irqsave(host_set lock)
244 static void ata_exec_command_pio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
246 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
248 outb(tf
->command
, ap
->ioaddr
.command_addr
);
254 * ata_exec_command_mmio - issue ATA command to host controller
255 * @ap: port to which command is being issued
256 * @tf: ATA taskfile register set
258 * Issues MMIO write to ATA command register, with proper
259 * synchronization with interrupt handler / other threads.
262 * spin_lock_irqsave(host_set lock)
265 static void ata_exec_command_mmio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
267 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
269 writeb(tf
->command
, (void __iomem
*) ap
->ioaddr
.command_addr
);
275 * ata_exec_command - issue ATA command to host controller
276 * @ap: port to which command is being issued
277 * @tf: ATA taskfile register set
279 * Issues PIO/MMIO write to ATA command register, with proper
280 * synchronization with interrupt handler / other threads.
283 * spin_lock_irqsave(host_set lock)
285 void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
287 if (ap
->flags
& ATA_FLAG_MMIO
)
288 ata_exec_command_mmio(ap
, tf
);
290 ata_exec_command_pio(ap
, tf
);
294 * ata_tf_to_host - issue ATA taskfile to host controller
295 * @ap: port to which command is being issued
296 * @tf: ATA taskfile register set
298 * Issues ATA taskfile register set to ATA host controller,
299 * with proper synchronization with interrupt handler and
303 * spin_lock_irqsave(host_set lock)
306 static inline void ata_tf_to_host(struct ata_port
*ap
,
307 const struct ata_taskfile
*tf
)
309 ap
->ops
->tf_load(ap
, tf
);
310 ap
->ops
->exec_command(ap
, tf
);
314 * ata_tf_read_pio - input device's ATA taskfile shadow registers
315 * @ap: Port from which input is read
316 * @tf: ATA taskfile register set for storing input
318 * Reads ATA taskfile registers for currently-selected device
322 * Inherited from caller.
325 static void ata_tf_read_pio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
327 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
329 tf
->command
= ata_check_status(ap
);
330 tf
->feature
= inb(ioaddr
->error_addr
);
331 tf
->nsect
= inb(ioaddr
->nsect_addr
);
332 tf
->lbal
= inb(ioaddr
->lbal_addr
);
333 tf
->lbam
= inb(ioaddr
->lbam_addr
);
334 tf
->lbah
= inb(ioaddr
->lbah_addr
);
335 tf
->device
= inb(ioaddr
->device_addr
);
337 if (tf
->flags
& ATA_TFLAG_LBA48
) {
338 outb(tf
->ctl
| ATA_HOB
, ioaddr
->ctl_addr
);
339 tf
->hob_feature
= inb(ioaddr
->error_addr
);
340 tf
->hob_nsect
= inb(ioaddr
->nsect_addr
);
341 tf
->hob_lbal
= inb(ioaddr
->lbal_addr
);
342 tf
->hob_lbam
= inb(ioaddr
->lbam_addr
);
343 tf
->hob_lbah
= inb(ioaddr
->lbah_addr
);
348 * ata_tf_read_mmio - input device's ATA taskfile shadow registers
349 * @ap: Port from which input is read
350 * @tf: ATA taskfile register set for storing input
352 * Reads ATA taskfile registers for currently-selected device
356 * Inherited from caller.
359 static void ata_tf_read_mmio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
361 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
363 tf
->command
= ata_check_status(ap
);
364 tf
->feature
= readb((void __iomem
*)ioaddr
->error_addr
);
365 tf
->nsect
= readb((void __iomem
*)ioaddr
->nsect_addr
);
366 tf
->lbal
= readb((void __iomem
*)ioaddr
->lbal_addr
);
367 tf
->lbam
= readb((void __iomem
*)ioaddr
->lbam_addr
);
368 tf
->lbah
= readb((void __iomem
*)ioaddr
->lbah_addr
);
369 tf
->device
= readb((void __iomem
*)ioaddr
->device_addr
);
371 if (tf
->flags
& ATA_TFLAG_LBA48
) {
372 writeb(tf
->ctl
| ATA_HOB
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
373 tf
->hob_feature
= readb((void __iomem
*)ioaddr
->error_addr
);
374 tf
->hob_nsect
= readb((void __iomem
*)ioaddr
->nsect_addr
);
375 tf
->hob_lbal
= readb((void __iomem
*)ioaddr
->lbal_addr
);
376 tf
->hob_lbam
= readb((void __iomem
*)ioaddr
->lbam_addr
);
377 tf
->hob_lbah
= readb((void __iomem
*)ioaddr
->lbah_addr
);
383 * ata_tf_read - input device's ATA taskfile shadow registers
384 * @ap: Port from which input is read
385 * @tf: ATA taskfile register set for storing input
387 * Reads ATA taskfile registers for currently-selected device
390 * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48
391 * is set, also reads the hob registers.
393 * May be used as the tf_read() entry in ata_port_operations.
396 * Inherited from caller.
398 void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
)
400 if (ap
->flags
& ATA_FLAG_MMIO
)
401 ata_tf_read_mmio(ap
, tf
);
403 ata_tf_read_pio(ap
, tf
);
407 * ata_check_status_pio - Read device status reg & clear interrupt
408 * @ap: port where the device is
410 * Reads ATA taskfile status register for currently-selected device
411 * and return its value. This also clears pending interrupts
415 * Inherited from caller.
417 static u8
ata_check_status_pio(struct ata_port
*ap
)
419 return inb(ap
->ioaddr
.status_addr
);
423 * ata_check_status_mmio - Read device status reg & clear interrupt
424 * @ap: port where the device is
426 * Reads ATA taskfile status register for currently-selected device
427 * via MMIO and return its value. This also clears pending interrupts
431 * Inherited from caller.
433 static u8
ata_check_status_mmio(struct ata_port
*ap
)
435 return readb((void __iomem
*) ap
->ioaddr
.status_addr
);
440 * ata_check_status - Read device status reg & clear interrupt
441 * @ap: port where the device is
443 * Reads ATA taskfile status register for currently-selected device
444 * and return its value. This also clears pending interrupts
447 * May be used as the check_status() entry in ata_port_operations.
450 * Inherited from caller.
452 u8
ata_check_status(struct ata_port
*ap
)
454 if (ap
->flags
& ATA_FLAG_MMIO
)
455 return ata_check_status_mmio(ap
);
456 return ata_check_status_pio(ap
);
461 * ata_altstatus - Read device alternate status reg
462 * @ap: port where the device is
464 * Reads ATA taskfile alternate status register for
465 * currently-selected device and return its value.
467 * Note: may NOT be used as the check_altstatus() entry in
468 * ata_port_operations.
471 * Inherited from caller.
473 u8
ata_altstatus(struct ata_port
*ap
)
475 if (ap
->ops
->check_altstatus
)
476 return ap
->ops
->check_altstatus(ap
);
478 if (ap
->flags
& ATA_FLAG_MMIO
)
479 return readb((void __iomem
*)ap
->ioaddr
.altstatus_addr
);
480 return inb(ap
->ioaddr
.altstatus_addr
);
485 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
486 * @tf: Taskfile to convert
487 * @fis: Buffer into which data will output
488 * @pmp: Port multiplier port
490 * Converts a standard ATA taskfile to a Serial ATA
491 * FIS structure (Register - Host to Device).
494 * Inherited from caller.
497 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
499 fis
[0] = 0x27; /* Register - Host to Device FIS */
500 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
501 bit 7 indicates Command FIS */
502 fis
[2] = tf
->command
;
503 fis
[3] = tf
->feature
;
510 fis
[8] = tf
->hob_lbal
;
511 fis
[9] = tf
->hob_lbam
;
512 fis
[10] = tf
->hob_lbah
;
513 fis
[11] = tf
->hob_feature
;
516 fis
[13] = tf
->hob_nsect
;
527 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
528 * @fis: Buffer from which data will be input
529 * @tf: Taskfile to output
531 * Converts a serial ATA FIS structure to a standard ATA taskfile.
534 * Inherited from caller.
537 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
539 tf
->command
= fis
[2]; /* status */
540 tf
->feature
= fis
[3]; /* error */
547 tf
->hob_lbal
= fis
[8];
548 tf
->hob_lbam
= fis
[9];
549 tf
->hob_lbah
= fis
[10];
552 tf
->hob_nsect
= fis
[13];
555 static const u8 ata_rw_cmds
[] = {
559 ATA_CMD_READ_MULTI_EXT
,
560 ATA_CMD_WRITE_MULTI_EXT
,
564 ATA_CMD_WRITE_MULTI_FUA_EXT
,
568 ATA_CMD_PIO_READ_EXT
,
569 ATA_CMD_PIO_WRITE_EXT
,
582 ATA_CMD_WRITE_FUA_EXT
586 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
587 * @qc: command to examine and configure
589 * Examine the device configuration and tf->flags to calculate
590 * the proper read/write commands and protocol to use.
595 int ata_rwcmd_protocol(struct ata_queued_cmd
*qc
)
597 struct ata_taskfile
*tf
= &qc
->tf
;
598 struct ata_device
*dev
= qc
->dev
;
601 int index
, fua
, lba48
, write
;
603 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
604 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
605 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
607 if (dev
->flags
& ATA_DFLAG_PIO
) {
608 tf
->protocol
= ATA_PROT_PIO
;
609 index
= dev
->multi_count
? 0 : 8;
610 } else if (lba48
&& (qc
->ap
->flags
& ATA_FLAG_PIO_LBA48
)) {
611 /* Unable to use DMA due to host limitation */
612 tf
->protocol
= ATA_PROT_PIO
;
613 index
= dev
->multi_count
? 0 : 4;
615 tf
->protocol
= ATA_PROT_DMA
;
619 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
627 static const char * const xfer_mode_str
[] = {
647 * ata_udma_string - convert UDMA bit offset to string
648 * @mask: mask of bits supported; only highest bit counts.
650 * Determine string which represents the highest speed
651 * (highest bit in @udma_mask).
657 * Constant C string representing highest speed listed in
658 * @udma_mask, or the constant C string "<n/a>".
661 static const char *ata_mode_string(unsigned int mask
)
665 for (i
= 7; i
>= 0; i
--)
668 for (i
= ATA_SHIFT_MWDMA
+ 2; i
>= ATA_SHIFT_MWDMA
; i
--)
671 for (i
= ATA_SHIFT_PIO
+ 4; i
>= ATA_SHIFT_PIO
; i
--)
678 return xfer_mode_str
[i
];
682 * ata_pio_devchk - PATA device presence detection
683 * @ap: ATA channel to examine
684 * @device: Device to examine (starting at zero)
686 * This technique was originally described in
687 * Hale Landis's ATADRVR (www.ata-atapi.com), and
688 * later found its way into the ATA/ATAPI spec.
690 * Write a pattern to the ATA shadow registers,
691 * and if a device is present, it will respond by
692 * correctly storing and echoing back the
693 * ATA shadow register contents.
699 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
702 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
705 ap
->ops
->dev_select(ap
, device
);
707 outb(0x55, ioaddr
->nsect_addr
);
708 outb(0xaa, ioaddr
->lbal_addr
);
710 outb(0xaa, ioaddr
->nsect_addr
);
711 outb(0x55, ioaddr
->lbal_addr
);
713 outb(0x55, ioaddr
->nsect_addr
);
714 outb(0xaa, ioaddr
->lbal_addr
);
716 nsect
= inb(ioaddr
->nsect_addr
);
717 lbal
= inb(ioaddr
->lbal_addr
);
719 if ((nsect
== 0x55) && (lbal
== 0xaa))
720 return 1; /* we found a device */
722 return 0; /* nothing found */
726 * ata_mmio_devchk - PATA device presence detection
727 * @ap: ATA channel to examine
728 * @device: Device to examine (starting at zero)
730 * This technique was originally described in
731 * Hale Landis's ATADRVR (www.ata-atapi.com), and
732 * later found its way into the ATA/ATAPI spec.
734 * Write a pattern to the ATA shadow registers,
735 * and if a device is present, it will respond by
736 * correctly storing and echoing back the
737 * ATA shadow register contents.
743 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
746 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
749 ap
->ops
->dev_select(ap
, device
);
751 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
752 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
754 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
755 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
757 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
758 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
760 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
761 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
763 if ((nsect
== 0x55) && (lbal
== 0xaa))
764 return 1; /* we found a device */
766 return 0; /* nothing found */
770 * ata_devchk - PATA device presence detection
771 * @ap: ATA channel to examine
772 * @device: Device to examine (starting at zero)
774 * Dispatch ATA device presence detection, depending
775 * on whether we are using PIO or MMIO to talk to the
776 * ATA shadow registers.
782 static unsigned int ata_devchk(struct ata_port
*ap
,
785 if (ap
->flags
& ATA_FLAG_MMIO
)
786 return ata_mmio_devchk(ap
, device
);
787 return ata_pio_devchk(ap
, device
);
791 * ata_dev_classify - determine device type based on ATA-spec signature
792 * @tf: ATA taskfile register set for device to be identified
794 * Determine from taskfile register contents whether a device is
795 * ATA or ATAPI, as per "Signature and persistence" section
796 * of ATA/PI spec (volume 1, sect 5.14).
802 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
803 * the event of failure.
806 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
808 /* Apple's open source Darwin code hints that some devices only
809 * put a proper signature into the LBA mid/high registers,
810 * So, we only check those. It's sufficient for uniqueness.
813 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
814 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
815 DPRINTK("found ATA device by sig\n");
819 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
820 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
821 DPRINTK("found ATAPI device by sig\n");
822 return ATA_DEV_ATAPI
;
825 DPRINTK("unknown device\n");
826 return ATA_DEV_UNKNOWN
;
830 * ata_dev_try_classify - Parse returned ATA device signature
831 * @ap: ATA channel to examine
832 * @device: Device to examine (starting at zero)
833 * @r_err: Value of error register on completion
835 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
836 * an ATA/ATAPI-defined set of values is placed in the ATA
837 * shadow registers, indicating the results of device detection
840 * Select the ATA device, and read the values from the ATA shadow
841 * registers. Then parse according to the Error register value,
842 * and the spec-defined values examined by ata_dev_classify().
848 * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
852 ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
, u8
*r_err
)
854 struct ata_taskfile tf
;
858 ap
->ops
->dev_select(ap
, device
);
860 memset(&tf
, 0, sizeof(tf
));
862 ap
->ops
->tf_read(ap
, &tf
);
867 /* see if device passed diags */
870 else if ((device
== 0) && (err
== 0x81))
875 /* determine if device is ATA or ATAPI */
876 class = ata_dev_classify(&tf
);
878 if (class == ATA_DEV_UNKNOWN
)
880 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
886 * ata_dev_id_string - Convert IDENTIFY DEVICE page into string
887 * @id: IDENTIFY DEVICE results we will examine
888 * @s: string into which data is output
889 * @ofs: offset into identify device page
890 * @len: length of string to return. must be an even number.
892 * The strings in the IDENTIFY DEVICE page are broken up into
893 * 16-bit chunks. Run through the string, and output each
894 * 8-bit chunk linearly, regardless of platform.
900 void ata_dev_id_string(const u16
*id
, unsigned char *s
,
901 unsigned int ofs
, unsigned int len
)
921 * ata_noop_dev_select - Select device 0/1 on ATA bus
922 * @ap: ATA channel to manipulate
923 * @device: ATA device (numbered from zero) to select
925 * This function performs no actual function.
927 * May be used as the dev_select() entry in ata_port_operations.
932 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
938 * ata_std_dev_select - Select device 0/1 on ATA bus
939 * @ap: ATA channel to manipulate
940 * @device: ATA device (numbered from zero) to select
942 * Use the method defined in the ATA specification to
943 * make either device 0, or device 1, active on the
944 * ATA channel. Works with both PIO and MMIO.
946 * May be used as the dev_select() entry in ata_port_operations.
952 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
957 tmp
= ATA_DEVICE_OBS
;
959 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
961 if (ap
->flags
& ATA_FLAG_MMIO
) {
962 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
964 outb(tmp
, ap
->ioaddr
.device_addr
);
966 ata_pause(ap
); /* needed; also flushes, for mmio */
970 * ata_dev_select - Select device 0/1 on ATA bus
971 * @ap: ATA channel to manipulate
972 * @device: ATA device (numbered from zero) to select
973 * @wait: non-zero to wait for Status register BSY bit to clear
974 * @can_sleep: non-zero if context allows sleeping
976 * Use the method defined in the ATA specification to
977 * make either device 0, or device 1, active on the
980 * This is a high-level version of ata_std_dev_select(),
981 * which additionally provides the services of inserting
982 * the proper pauses and status polling, where needed.
988 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
989 unsigned int wait
, unsigned int can_sleep
)
991 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
992 ap
->id
, device
, wait
);
997 ap
->ops
->dev_select(ap
, device
);
1000 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
1007 * ata_dump_id - IDENTIFY DEVICE info debugging output
1008 * @dev: Device whose IDENTIFY DEVICE page we will dump
1010 * Dump selected 16-bit words from a detected device's
1011 * IDENTIFY PAGE page.
1017 static inline void ata_dump_id(const struct ata_device
*dev
)
1019 DPRINTK("49==0x%04x "
1029 DPRINTK("80==0x%04x "
1039 DPRINTK("88==0x%04x "
1046 * Compute the PIO modes available for this device. This is not as
1047 * trivial as it seems if we must consider early devices correctly.
1049 * FIXME: pre IDE drive timing (do we care ?).
1052 static unsigned int ata_pio_modes(const struct ata_device
*adev
)
1056 /* Usual case. Word 53 indicates word 64 is valid */
1057 if (adev
->id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1058 modes
= adev
->id
[ATA_ID_PIO_MODES
] & 0x03;
1064 /* If word 64 isn't valid then Word 51 high byte holds the PIO timing
1065 number for the maximum. Turn it into a mask and return it */
1066 modes
= (2 << ((adev
->id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF)) - 1 ;
1068 /* But wait.. there's more. Design your standards by committee and
1069 you too can get a free iordy field to process. However its the
1070 speeds not the modes that are supported... Note drivers using the
1071 timing API will get this right anyway */
1075 ata_queue_packet_task(struct ata_port
*ap
)
1077 if (!(ap
->flags
& ATA_FLAG_FLUSH_PIO_TASK
))
1078 queue_work(ata_wq
, &ap
->packet_task
);
1082 ata_queue_pio_task(struct ata_port
*ap
)
1084 if (!(ap
->flags
& ATA_FLAG_FLUSH_PIO_TASK
))
1085 queue_work(ata_wq
, &ap
->pio_task
);
1089 ata_queue_delayed_pio_task(struct ata_port
*ap
, unsigned long delay
)
1091 if (!(ap
->flags
& ATA_FLAG_FLUSH_PIO_TASK
))
1092 queue_delayed_work(ata_wq
, &ap
->pio_task
, delay
);
1096 * ata_flush_pio_tasks - Flush pio_task and packet_task
1097 * @ap: the target ata_port
1099 * After this function completes, pio_task and packet_task are
1100 * guranteed not to be running or scheduled.
1103 * Kernel thread context (may sleep)
1106 static void ata_flush_pio_tasks(struct ata_port
*ap
)
1109 unsigned long flags
;
1113 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1114 ap
->flags
|= ATA_FLAG_FLUSH_PIO_TASK
;
1115 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1117 DPRINTK("flush #1\n");
1118 flush_workqueue(ata_wq
);
1121 * At this point, if a task is running, it's guaranteed to see
1122 * the FLUSH flag; thus, it will never queue pio tasks again.
1125 tmp
|= cancel_delayed_work(&ap
->pio_task
);
1126 tmp
|= cancel_delayed_work(&ap
->packet_task
);
1128 DPRINTK("flush #2\n");
1129 flush_workqueue(ata_wq
);
1132 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1133 ap
->flags
&= ~ATA_FLAG_FLUSH_PIO_TASK
;
1134 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1139 void ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1141 struct completion
*waiting
= qc
->private_data
;
1143 qc
->ap
->ops
->tf_read(qc
->ap
, &qc
->tf
);
1148 * ata_exec_internal - execute libata internal command
1149 * @ap: Port to which the command is sent
1150 * @dev: Device to which the command is sent
1151 * @tf: Taskfile registers for the command and the result
1152 * @dma_dir: Data tranfer direction of the command
1153 * @buf: Data buffer of the command
1154 * @buflen: Length of data buffer
1156 * Executes libata internal command with timeout. @tf contains
1157 * command on entry and result on return. Timeout and error
1158 * conditions are reported via return value. No recovery action
1159 * is taken after a command times out. It's caller's duty to
1160 * clean up after timeout.
1163 * None. Should be called with kernel context, might sleep.
1167 ata_exec_internal(struct ata_port
*ap
, struct ata_device
*dev
,
1168 struct ata_taskfile
*tf
,
1169 int dma_dir
, void *buf
, unsigned int buflen
)
1171 u8 command
= tf
->command
;
1172 struct ata_queued_cmd
*qc
;
1173 DECLARE_COMPLETION(wait
);
1174 unsigned long flags
;
1175 unsigned int err_mask
;
1177 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1179 qc
= ata_qc_new_init(ap
, dev
);
1183 qc
->dma_dir
= dma_dir
;
1184 if (dma_dir
!= DMA_NONE
) {
1185 ata_sg_init_one(qc
, buf
, buflen
);
1186 qc
->nsect
= buflen
/ ATA_SECT_SIZE
;
1189 qc
->private_data
= &wait
;
1190 qc
->complete_fn
= ata_qc_complete_internal
;
1192 qc
->err_mask
= ata_qc_issue(qc
);
1194 ata_qc_complete(qc
);
1196 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1198 if (!wait_for_completion_timeout(&wait
, ATA_TMOUT_INTERNAL
)) {
1199 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1201 /* We're racing with irq here. If we lose, the
1202 * following test prevents us from completing the qc
1203 * again. If completion irq occurs after here but
1204 * before the caller cleans up, it will result in a
1205 * spurious interrupt. We can live with that.
1207 if (qc
->flags
& ATA_QCFLAG_ACTIVE
) {
1208 qc
->err_mask
= AC_ERR_TIMEOUT
;
1209 ata_qc_complete(qc
);
1210 printk(KERN_WARNING
"ata%u: qc timeout (cmd 0x%x)\n",
1214 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1218 err_mask
= qc
->err_mask
;
1226 * ata_pio_need_iordy - check if iordy needed
1229 * Check if the current speed of the device requires IORDY. Used
1230 * by various controllers for chip configuration.
1233 unsigned int ata_pio_need_iordy(const struct ata_device
*adev
)
1236 int speed
= adev
->pio_mode
- XFER_PIO_0
;
1243 /* If we have no drive specific rule, then PIO 2 is non IORDY */
1245 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE */
1246 pio
= adev
->id
[ATA_ID_EIDE_PIO
];
1247 /* Is the speed faster than the drive allows non IORDY ? */
1249 /* This is cycle times not frequency - watch the logic! */
1250 if (pio
> 240) /* PIO2 is 240nS per cycle */
1259 * ata_dev_identify - obtain IDENTIFY x DEVICE page
1260 * @ap: port on which device we wish to probe resides
1261 * @device: device bus address, starting at zero
1263 * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE
1264 * command, and read back the 512-byte device information page.
1265 * The device information page is fed to us via the standard
1266 * PIO-IN protocol, but we hand-code it here. (TODO: investigate
1267 * using standard PIO-IN paths)
1269 * After reading the device information page, we use several
1270 * bits of information from it to initialize data structures
1271 * that will be used during the lifetime of the ata_device.
1272 * Other data from the info page is used to disqualify certain
1273 * older ATA devices we do not wish to support.
1276 * Inherited from caller. Some functions called by this function
1277 * obtain the host_set lock.
1280 static void ata_dev_identify(struct ata_port
*ap
, unsigned int device
)
1282 struct ata_device
*dev
= &ap
->device
[device
];
1283 unsigned int major_version
;
1285 unsigned long xfer_modes
;
1286 unsigned int using_edd
;
1287 struct ata_taskfile tf
;
1288 unsigned int err_mask
;
1291 if (!ata_dev_present(dev
)) {
1292 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1297 if (ap
->flags
& (ATA_FLAG_SRST
| ATA_FLAG_SATA_RESET
))
1302 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, device
);
1304 assert (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ATAPI
||
1305 dev
->class == ATA_DEV_NONE
);
1307 ata_dev_select(ap
, device
, 1, 1); /* select device 0/1 */
1310 ata_tf_init(ap
, &tf
, device
);
1312 if (dev
->class == ATA_DEV_ATA
) {
1313 tf
.command
= ATA_CMD_ID_ATA
;
1314 DPRINTK("do ATA identify\n");
1316 tf
.command
= ATA_CMD_ID_ATAPI
;
1317 DPRINTK("do ATAPI identify\n");
1320 tf
.protocol
= ATA_PROT_PIO
;
1322 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_FROM_DEVICE
,
1323 dev
->id
, sizeof(dev
->id
));
1326 if (err_mask
& ~AC_ERR_DEV
)
1330 * arg! EDD works for all test cases, but seems to return
1331 * the ATA signature for some ATAPI devices. Until the
1332 * reason for this is found and fixed, we fix up the mess
1333 * here. If IDENTIFY DEVICE returns command aborted
1334 * (as ATAPI devices do), then we issue an
1335 * IDENTIFY PACKET DEVICE.
1337 * ATA software reset (SRST, the default) does not appear
1338 * to have this problem.
1340 if ((using_edd
) && (dev
->class == ATA_DEV_ATA
)) {
1341 u8 err
= tf
.feature
;
1342 if (err
& ATA_ABORTED
) {
1343 dev
->class = ATA_DEV_ATAPI
;
1350 swap_buf_le16(dev
->id
, ATA_ID_WORDS
);
1352 /* print device capabilities */
1353 printk(KERN_DEBUG
"ata%u: dev %u cfg "
1354 "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1355 ap
->id
, device
, dev
->id
[49],
1356 dev
->id
[82], dev
->id
[83], dev
->id
[84],
1357 dev
->id
[85], dev
->id
[86], dev
->id
[87],
1361 * common ATA, ATAPI feature tests
1364 /* we require DMA support (bits 8 of word 49) */
1365 if (!ata_id_has_dma(dev
->id
)) {
1366 printk(KERN_DEBUG
"ata%u: no dma\n", ap
->id
);
1370 /* quick-n-dirty find max transfer mode; for printk only */
1371 xfer_modes
= dev
->id
[ATA_ID_UDMA_MODES
];
1373 xfer_modes
= (dev
->id
[ATA_ID_MWDMA_MODES
]) << ATA_SHIFT_MWDMA
;
1375 xfer_modes
= ata_pio_modes(dev
);
1379 /* ATA-specific feature tests */
1380 if (dev
->class == ATA_DEV_ATA
) {
1381 if (!ata_id_is_ata(dev
->id
)) /* sanity check */
1384 /* get major version */
1385 tmp
= dev
->id
[ATA_ID_MAJOR_VER
];
1386 for (major_version
= 14; major_version
>= 1; major_version
--)
1387 if (tmp
& (1 << major_version
))
1391 * The exact sequence expected by certain pre-ATA4 drives is:
1394 * INITIALIZE DEVICE PARAMETERS
1396 * Some drives were very specific about that exact sequence.
1398 if (major_version
< 4 || (!ata_id_has_lba(dev
->id
))) {
1399 ata_dev_init_params(ap
, dev
);
1401 /* current CHS translation info (id[53-58]) might be
1402 * changed. reread the identify device info.
1404 ata_dev_reread_id(ap
, dev
);
1407 if (ata_id_has_lba(dev
->id
)) {
1408 dev
->flags
|= ATA_DFLAG_LBA
;
1410 if (ata_id_has_lba48(dev
->id
)) {
1411 dev
->flags
|= ATA_DFLAG_LBA48
;
1412 dev
->n_sectors
= ata_id_u64(dev
->id
, 100);
1414 dev
->n_sectors
= ata_id_u32(dev
->id
, 60);
1417 /* print device info to dmesg */
1418 printk(KERN_INFO
"ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n",
1421 ata_mode_string(xfer_modes
),
1422 (unsigned long long)dev
->n_sectors
,
1423 dev
->flags
& ATA_DFLAG_LBA48
? " LBA48" : " LBA");
1427 /* Default translation */
1428 dev
->cylinders
= dev
->id
[1];
1429 dev
->heads
= dev
->id
[3];
1430 dev
->sectors
= dev
->id
[6];
1431 dev
->n_sectors
= dev
->cylinders
* dev
->heads
* dev
->sectors
;
1433 if (ata_id_current_chs_valid(dev
->id
)) {
1434 /* Current CHS translation is valid. */
1435 dev
->cylinders
= dev
->id
[54];
1436 dev
->heads
= dev
->id
[55];
1437 dev
->sectors
= dev
->id
[56];
1439 dev
->n_sectors
= ata_id_u32(dev
->id
, 57);
1442 /* print device info to dmesg */
1443 printk(KERN_INFO
"ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n",
1446 ata_mode_string(xfer_modes
),
1447 (unsigned long long)dev
->n_sectors
,
1448 (int)dev
->cylinders
, (int)dev
->heads
, (int)dev
->sectors
);
1452 ap
->host
->max_cmd_len
= 16;
1455 /* ATAPI-specific feature tests */
1456 else if (dev
->class == ATA_DEV_ATAPI
) {
1457 if (ata_id_is_ata(dev
->id
)) /* sanity check */
1460 rc
= atapi_cdb_len(dev
->id
);
1461 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1462 printk(KERN_WARNING
"ata%u: unsupported CDB len\n", ap
->id
);
1465 ap
->cdb_len
= (unsigned int) rc
;
1466 ap
->host
->max_cmd_len
= (unsigned char) ap
->cdb_len
;
1468 /* print device info to dmesg */
1469 printk(KERN_INFO
"ata%u: dev %u ATAPI, max %s\n",
1471 ata_mode_string(xfer_modes
));
1474 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1478 printk(KERN_WARNING
"ata%u: dev %u not supported, ignoring\n",
1481 dev
->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */
1482 DPRINTK("EXIT, err\n");
1486 static inline u8
ata_dev_knobble(const struct ata_port
*ap
)
1488 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(ap
->device
->id
)));
1492 * ata_dev_config - Run device specific handlers & check for SATA->PATA bridges
1499 void ata_dev_config(struct ata_port
*ap
, unsigned int i
)
1501 /* limit bridge transfers to udma5, 200 sectors */
1502 if (ata_dev_knobble(ap
)) {
1503 printk(KERN_INFO
"ata%u(%u): applying bridge limits\n",
1504 ap
->id
, ap
->device
->devno
);
1505 ap
->udma_mask
&= ATA_UDMA5
;
1506 ap
->host
->max_sectors
= ATA_MAX_SECTORS
;
1507 ap
->host
->hostt
->max_sectors
= ATA_MAX_SECTORS
;
1508 ap
->device
[i
].flags
|= ATA_DFLAG_LOCK_SECTORS
;
1511 if (ap
->ops
->dev_config
)
1512 ap
->ops
->dev_config(ap
, &ap
->device
[i
]);
1516 * ata_bus_probe - Reset and probe ATA bus
1519 * Master ATA bus probing function. Initiates a hardware-dependent
1520 * bus reset, then attempts to identify any devices found on
1524 * PCI/etc. bus probe sem.
1527 * Zero on success, non-zero on error.
1530 static int ata_bus_probe(struct ata_port
*ap
)
1532 unsigned int i
, found
= 0;
1534 if (ap
->ops
->probe_reset
) {
1535 unsigned int classes
[ATA_MAX_DEVICES
];
1540 rc
= ap
->ops
->probe_reset(ap
, classes
);
1542 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
1543 ap
->device
[i
].class = classes
[i
];
1545 printk(KERN_ERR
"ata%u: probe reset failed, "
1546 "disabling port\n", ap
->id
);
1547 ata_port_disable(ap
);
1550 ap
->ops
->phy_reset(ap
);
1552 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1555 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1556 ata_dev_identify(ap
, i
);
1557 if (ata_dev_present(&ap
->device
[i
])) {
1559 ata_dev_config(ap
,i
);
1563 if ((!found
) || (ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1564 goto err_out_disable
;
1567 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1568 goto err_out_disable
;
1573 ap
->ops
->port_disable(ap
);
1579 * ata_port_probe - Mark port as enabled
1580 * @ap: Port for which we indicate enablement
1582 * Modify @ap data structure such that the system
1583 * thinks that the entire port is enabled.
1585 * LOCKING: host_set lock, or some other form of
1589 void ata_port_probe(struct ata_port
*ap
)
1591 ap
->flags
&= ~ATA_FLAG_PORT_DISABLED
;
1595 * sata_print_link_status - Print SATA link status
1596 * @ap: SATA port to printk link status about
1598 * This function prints link speed and status of a SATA link.
1603 static void sata_print_link_status(struct ata_port
*ap
)
1608 if (!ap
->ops
->scr_read
)
1611 sstatus
= scr_read(ap
, SCR_STATUS
);
1613 if (sata_dev_present(ap
)) {
1614 tmp
= (sstatus
>> 4) & 0xf;
1617 else if (tmp
& (1 << 1))
1620 speed
= "<unknown>";
1621 printk(KERN_INFO
"ata%u: SATA link up %s Gbps (SStatus %X)\n",
1622 ap
->id
, speed
, sstatus
);
1624 printk(KERN_INFO
"ata%u: SATA link down (SStatus %X)\n",
1630 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1631 * @ap: SATA port associated with target SATA PHY.
1633 * This function issues commands to standard SATA Sxxx
1634 * PHY registers, to wake up the phy (and device), and
1635 * clear any reset condition.
1638 * PCI/etc. bus probe sem.
1641 void __sata_phy_reset(struct ata_port
*ap
)
1644 unsigned long timeout
= jiffies
+ (HZ
* 5);
1646 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1647 /* issue phy wake/reset */
1648 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1649 /* Couldn't find anything in SATA I/II specs, but
1650 * AHCI-1.1 10.4.2 says at least 1 ms. */
1653 scr_write_flush(ap
, SCR_CONTROL
, 0x300); /* phy wake/clear reset */
1655 /* wait for phy to become ready, if necessary */
1658 sstatus
= scr_read(ap
, SCR_STATUS
);
1659 if ((sstatus
& 0xf) != 1)
1661 } while (time_before(jiffies
, timeout
));
1663 /* print link status */
1664 sata_print_link_status(ap
);
1666 /* TODO: phy layer with polling, timeouts, etc. */
1667 if (sata_dev_present(ap
))
1670 ata_port_disable(ap
);
1672 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1675 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1676 ata_port_disable(ap
);
1680 ap
->cbl
= ATA_CBL_SATA
;
1684 * sata_phy_reset - Reset SATA bus.
1685 * @ap: SATA port associated with target SATA PHY.
1687 * This function resets the SATA bus, and then probes
1688 * the bus for devices.
1691 * PCI/etc. bus probe sem.
1694 void sata_phy_reset(struct ata_port
*ap
)
1696 __sata_phy_reset(ap
);
1697 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1703 * ata_port_disable - Disable port.
1704 * @ap: Port to be disabled.
1706 * Modify @ap data structure such that the system
1707 * thinks that the entire port is disabled, and should
1708 * never attempt to probe or communicate with devices
1711 * LOCKING: host_set lock, or some other form of
1715 void ata_port_disable(struct ata_port
*ap
)
1717 ap
->device
[0].class = ATA_DEV_NONE
;
1718 ap
->device
[1].class = ATA_DEV_NONE
;
1719 ap
->flags
|= ATA_FLAG_PORT_DISABLED
;
1723 * This mode timing computation functionality is ported over from
1724 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1727 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1728 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1729 * for PIO 5, which is a nonstandard extension and UDMA6, which
1730 * is currently supported only by Maxtor drives.
1733 static const struct ata_timing ata_timing
[] = {
1735 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
1736 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
1737 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
1738 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
1740 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
1741 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
1742 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
1744 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1746 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
1747 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
1748 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
1750 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
1751 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
1752 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
1754 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1755 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
1756 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
1758 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
1759 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
1760 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
1762 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1767 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1768 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1770 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
1772 q
->setup
= EZ(t
->setup
* 1000, T
);
1773 q
->act8b
= EZ(t
->act8b
* 1000, T
);
1774 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
1775 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
1776 q
->active
= EZ(t
->active
* 1000, T
);
1777 q
->recover
= EZ(t
->recover
* 1000, T
);
1778 q
->cycle
= EZ(t
->cycle
* 1000, T
);
1779 q
->udma
= EZ(t
->udma
* 1000, UT
);
1782 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
1783 struct ata_timing
*m
, unsigned int what
)
1785 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
1786 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
1787 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
1788 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
1789 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
1790 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
1791 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
1792 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
1795 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
1797 const struct ata_timing
*t
;
1799 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
1800 if (t
->mode
== 0xFF)
1805 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
1806 struct ata_timing
*t
, int T
, int UT
)
1808 const struct ata_timing
*s
;
1809 struct ata_timing p
;
1815 if (!(s
= ata_timing_find_mode(speed
)))
1818 memcpy(t
, s
, sizeof(*s
));
1821 * If the drive is an EIDE drive, it can tell us it needs extended
1822 * PIO/MW_DMA cycle timing.
1825 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
1826 memset(&p
, 0, sizeof(p
));
1827 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
1828 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
1829 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
1830 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
1831 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
1833 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
1837 * Convert the timing to bus clock counts.
1840 ata_timing_quantize(t
, t
, T
, UT
);
1843 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
1844 * S.M.A.R.T * and some other commands. We have to ensure that the
1845 * DMA cycle timing is slower/equal than the fastest PIO timing.
1848 if (speed
> XFER_PIO_4
) {
1849 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
1850 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
1854 * Lengthen active & recovery time so that cycle time is correct.
1857 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
1858 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
1859 t
->rec8b
= t
->cyc8b
- t
->act8b
;
1862 if (t
->active
+ t
->recover
< t
->cycle
) {
1863 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
1864 t
->recover
= t
->cycle
- t
->active
;
1870 static const struct {
1873 } xfer_mode_classes
[] = {
1874 { ATA_SHIFT_UDMA
, XFER_UDMA_0
},
1875 { ATA_SHIFT_MWDMA
, XFER_MW_DMA_0
},
1876 { ATA_SHIFT_PIO
, XFER_PIO_0
},
1879 static u8
base_from_shift(unsigned int shift
)
1883 for (i
= 0; i
< ARRAY_SIZE(xfer_mode_classes
); i
++)
1884 if (xfer_mode_classes
[i
].shift
== shift
)
1885 return xfer_mode_classes
[i
].base
;
1890 static void ata_dev_set_mode(struct ata_port
*ap
, struct ata_device
*dev
)
1895 if (!ata_dev_present(dev
) || (ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1898 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
1899 dev
->flags
|= ATA_DFLAG_PIO
;
1901 ata_dev_set_xfermode(ap
, dev
);
1903 base
= base_from_shift(dev
->xfer_shift
);
1904 ofs
= dev
->xfer_mode
- base
;
1905 idx
= ofs
+ dev
->xfer_shift
;
1906 WARN_ON(idx
>= ARRAY_SIZE(xfer_mode_str
));
1908 DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n",
1909 idx
, dev
->xfer_shift
, (int)dev
->xfer_mode
, (int)base
, ofs
);
1911 printk(KERN_INFO
"ata%u: dev %u configured for %s\n",
1912 ap
->id
, dev
->devno
, xfer_mode_str
[idx
]);
1915 static int ata_host_set_pio(struct ata_port
*ap
)
1921 mask
= ata_get_mode_mask(ap
, ATA_SHIFT_PIO
);
1924 printk(KERN_WARNING
"ata%u: no PIO support\n", ap
->id
);
1928 base
= base_from_shift(ATA_SHIFT_PIO
);
1929 xfer_mode
= base
+ x
;
1931 DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n",
1932 (int)base
, (int)xfer_mode
, mask
, x
);
1934 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1935 struct ata_device
*dev
= &ap
->device
[i
];
1936 if (ata_dev_present(dev
)) {
1937 dev
->pio_mode
= xfer_mode
;
1938 dev
->xfer_mode
= xfer_mode
;
1939 dev
->xfer_shift
= ATA_SHIFT_PIO
;
1940 if (ap
->ops
->set_piomode
)
1941 ap
->ops
->set_piomode(ap
, dev
);
1948 static void ata_host_set_dma(struct ata_port
*ap
, u8 xfer_mode
,
1949 unsigned int xfer_shift
)
1953 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1954 struct ata_device
*dev
= &ap
->device
[i
];
1955 if (ata_dev_present(dev
)) {
1956 dev
->dma_mode
= xfer_mode
;
1957 dev
->xfer_mode
= xfer_mode
;
1958 dev
->xfer_shift
= xfer_shift
;
1959 if (ap
->ops
->set_dmamode
)
1960 ap
->ops
->set_dmamode(ap
, dev
);
1966 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1967 * @ap: port on which timings will be programmed
1969 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1972 * PCI/etc. bus probe sem.
1974 static void ata_set_mode(struct ata_port
*ap
)
1976 unsigned int xfer_shift
;
1980 /* step 1: always set host PIO timings */
1981 rc
= ata_host_set_pio(ap
);
1985 /* step 2: choose the best data xfer mode */
1986 xfer_mode
= xfer_shift
= 0;
1987 rc
= ata_choose_xfer_mode(ap
, &xfer_mode
, &xfer_shift
);
1991 /* step 3: if that xfer mode isn't PIO, set host DMA timings */
1992 if (xfer_shift
!= ATA_SHIFT_PIO
)
1993 ata_host_set_dma(ap
, xfer_mode
, xfer_shift
);
1995 /* step 4: update devices' xfer mode */
1996 ata_dev_set_mode(ap
, &ap
->device
[0]);
1997 ata_dev_set_mode(ap
, &ap
->device
[1]);
1999 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
2002 if (ap
->ops
->post_set_mode
)
2003 ap
->ops
->post_set_mode(ap
);
2008 ata_port_disable(ap
);
2012 * ata_busy_sleep - sleep until BSY clears, or timeout
2013 * @ap: port containing status register to be polled
2014 * @tmout_pat: impatience timeout
2015 * @tmout: overall timeout
2017 * Sleep until ATA Status register bit BSY clears,
2018 * or a timeout occurs.
2023 unsigned int ata_busy_sleep (struct ata_port
*ap
,
2024 unsigned long tmout_pat
, unsigned long tmout
)
2026 unsigned long timer_start
, timeout
;
2029 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
2030 timer_start
= jiffies
;
2031 timeout
= timer_start
+ tmout_pat
;
2032 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
2034 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
2037 if (status
& ATA_BUSY
)
2038 printk(KERN_WARNING
"ata%u is slow to respond, "
2039 "please be patient\n", ap
->id
);
2041 timeout
= timer_start
+ tmout
;
2042 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
2044 status
= ata_chk_status(ap
);
2047 if (status
& ATA_BUSY
) {
2048 printk(KERN_ERR
"ata%u failed to respond (%lu secs)\n",
2049 ap
->id
, tmout
/ HZ
);
2056 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
2058 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2059 unsigned int dev0
= devmask
& (1 << 0);
2060 unsigned int dev1
= devmask
& (1 << 1);
2061 unsigned long timeout
;
2063 /* if device 0 was found in ata_devchk, wait for its
2067 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2069 /* if device 1 was found in ata_devchk, wait for
2070 * register access, then wait for BSY to clear
2072 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
2076 ap
->ops
->dev_select(ap
, 1);
2077 if (ap
->flags
& ATA_FLAG_MMIO
) {
2078 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
2079 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
2081 nsect
= inb(ioaddr
->nsect_addr
);
2082 lbal
= inb(ioaddr
->lbal_addr
);
2084 if ((nsect
== 1) && (lbal
== 1))
2086 if (time_after(jiffies
, timeout
)) {
2090 msleep(50); /* give drive a breather */
2093 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2095 /* is all this really necessary? */
2096 ap
->ops
->dev_select(ap
, 0);
2098 ap
->ops
->dev_select(ap
, 1);
2100 ap
->ops
->dev_select(ap
, 0);
2104 * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
2105 * @ap: Port to reset and probe
2107 * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
2108 * probe the bus. Not often used these days.
2111 * PCI/etc. bus probe sem.
2112 * Obtains host_set lock.
2116 static unsigned int ata_bus_edd(struct ata_port
*ap
)
2118 struct ata_taskfile tf
;
2119 unsigned long flags
;
2121 /* set up execute-device-diag (bus reset) taskfile */
2122 /* also, take interrupts to a known state (disabled) */
2123 DPRINTK("execute-device-diag\n");
2124 ata_tf_init(ap
, &tf
, 0);
2126 tf
.command
= ATA_CMD_EDD
;
2127 tf
.protocol
= ATA_PROT_NODATA
;
2130 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2131 ata_tf_to_host(ap
, &tf
);
2132 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2134 /* spec says at least 2ms. but who knows with those
2135 * crazy ATAPI devices...
2139 return ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2142 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2143 unsigned int devmask
)
2145 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2147 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2149 /* software reset. causes dev0 to be selected */
2150 if (ap
->flags
& ATA_FLAG_MMIO
) {
2151 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2152 udelay(20); /* FIXME: flush */
2153 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
2154 udelay(20); /* FIXME: flush */
2155 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2157 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2159 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2161 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2164 /* spec mandates ">= 2ms" before checking status.
2165 * We wait 150ms, because that was the magic delay used for
2166 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2167 * between when the ATA command register is written, and then
2168 * status is checked. Because waiting for "a while" before
2169 * checking status is fine, post SRST, we perform this magic
2170 * delay here as well.
2174 ata_bus_post_reset(ap
, devmask
);
2180 * ata_bus_reset - reset host port and associated ATA channel
2181 * @ap: port to reset
2183 * This is typically the first time we actually start issuing
2184 * commands to the ATA channel. We wait for BSY to clear, then
2185 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2186 * result. Determine what devices, if any, are on the channel
2187 * by looking at the device 0/1 error register. Look at the signature
2188 * stored in each device's taskfile registers, to determine if
2189 * the device is ATA or ATAPI.
2192 * PCI/etc. bus probe sem.
2193 * Obtains host_set lock.
2196 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
2199 void ata_bus_reset(struct ata_port
*ap
)
2201 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2202 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2204 unsigned int dev0
, dev1
= 0, rc
= 0, devmask
= 0;
2206 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2208 /* determine if device 0/1 are present */
2209 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2212 dev0
= ata_devchk(ap
, 0);
2214 dev1
= ata_devchk(ap
, 1);
2218 devmask
|= (1 << 0);
2220 devmask
|= (1 << 1);
2222 /* select device 0 again */
2223 ap
->ops
->dev_select(ap
, 0);
2225 /* issue bus reset */
2226 if (ap
->flags
& ATA_FLAG_SRST
)
2227 rc
= ata_bus_softreset(ap
, devmask
);
2228 else if ((ap
->flags
& ATA_FLAG_SATA_RESET
) == 0) {
2229 /* set up device control */
2230 if (ap
->flags
& ATA_FLAG_MMIO
)
2231 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2233 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2234 rc
= ata_bus_edd(ap
);
2241 * determine by signature whether we have ATA or ATAPI devices
2243 ap
->device
[0].class = ata_dev_try_classify(ap
, 0, &err
);
2244 if ((slave_possible
) && (err
!= 0x81))
2245 ap
->device
[1].class = ata_dev_try_classify(ap
, 1, &err
);
2247 /* re-enable interrupts */
2248 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2251 /* is double-select really necessary? */
2252 if (ap
->device
[1].class != ATA_DEV_NONE
)
2253 ap
->ops
->dev_select(ap
, 1);
2254 if (ap
->device
[0].class != ATA_DEV_NONE
)
2255 ap
->ops
->dev_select(ap
, 0);
2257 /* if no devices were detected, disable this port */
2258 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2259 (ap
->device
[1].class == ATA_DEV_NONE
))
2262 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2263 /* set up device control for ATA_FLAG_SATA_RESET */
2264 if (ap
->flags
& ATA_FLAG_MMIO
)
2265 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2267 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2274 printk(KERN_ERR
"ata%u: disabling port\n", ap
->id
);
2275 ap
->ops
->port_disable(ap
);
2281 * ata_std_softreset - reset host port via ATA SRST
2282 * @ap: port to reset
2283 * @verbose: fail verbosely
2284 * @classes: resulting classes of attached devices
2286 * Reset host port using ATA SRST. This function is to be used
2287 * as standard callback for ata_drive_*_reset() functions.
2290 * Kernel thread context (may sleep)
2293 * 0 on success, -errno otherwise.
2295 int ata_std_softreset(struct ata_port
*ap
, int verbose
, unsigned int *classes
)
2297 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2298 unsigned int devmask
= 0, err_mask
;
2303 /* determine if device 0/1 are present */
2304 if (ata_devchk(ap
, 0))
2305 devmask
|= (1 << 0);
2306 if (slave_possible
&& ata_devchk(ap
, 1))
2307 devmask
|= (1 << 1);
2309 /* devchk reports device presence without actual device on
2310 * most SATA controllers. Check SStatus and turn devmask off
2311 * if link is offline. Note that we should continue resetting
2312 * even when it seems like there's no device.
2314 if (ap
->ops
->scr_read
&& !sata_dev_present(ap
))
2317 /* select device 0 again */
2318 ap
->ops
->dev_select(ap
, 0);
2320 /* issue bus reset */
2321 DPRINTK("about to softreset, devmask=%x\n", devmask
);
2322 err_mask
= ata_bus_softreset(ap
, devmask
);
2325 printk(KERN_ERR
"ata%u: SRST failed (err_mask=0x%x)\n",
2328 DPRINTK("EXIT, softreset failed (err_mask=0x%x)\n",
2333 /* determine by signature whether we have ATA or ATAPI devices */
2334 classes
[0] = ata_dev_try_classify(ap
, 0, &err
);
2335 if (slave_possible
&& err
!= 0x81)
2336 classes
[1] = ata_dev_try_classify(ap
, 1, &err
);
2338 DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes
[0], classes
[1]);
2343 * sata_std_hardreset - reset host port via SATA phy reset
2344 * @ap: port to reset
2345 * @verbose: fail verbosely
2346 * @class: resulting class of attached device
2348 * SATA phy-reset host port using DET bits of SControl register.
2349 * This function is to be used as standard callback for
2350 * ata_drive_*_reset().
2353 * Kernel thread context (may sleep)
2356 * 0 on success, -errno otherwise.
2358 int sata_std_hardreset(struct ata_port
*ap
, int verbose
, unsigned int *class)
2360 u32 sstatus
, serror
;
2361 unsigned long timeout
= jiffies
+ (HZ
* 5);
2365 /* Issue phy wake/reset */
2366 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
2369 * Couldn't find anything in SATA I/II specs, but AHCI-1.1
2370 * 10.4.2 says at least 1 ms.
2374 scr_write_flush(ap
, SCR_CONTROL
, 0x300);
2376 /* Wait for phy to become ready, if necessary. */
2379 sstatus
= scr_read(ap
, SCR_STATUS
);
2380 if ((sstatus
& 0xf) != 1)
2382 } while (time_before(jiffies
, timeout
));
2385 serror
= scr_read(ap
, SCR_ERROR
);
2386 scr_write(ap
, SCR_ERROR
, serror
);
2388 /* TODO: phy layer with polling, timeouts, etc. */
2389 if (!sata_dev_present(ap
)) {
2390 *class = ATA_DEV_NONE
;
2391 DPRINTK("EXIT, link offline\n");
2395 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
2397 printk(KERN_ERR
"ata%u: COMRESET failed "
2398 "(device not ready)\n", ap
->id
);
2400 DPRINTK("EXIT, device not ready\n");
2404 *class = ata_dev_try_classify(ap
, 0, NULL
);
2406 DPRINTK("EXIT, class=%u\n", *class);
2411 * ata_std_postreset - standard postreset callback
2412 * @ap: the target ata_port
2413 * @classes: classes of attached devices
2415 * This function is invoked after a successful reset. Note that
2416 * the device might have been reset more than once using
2417 * different reset methods before postreset is invoked.
2418 * postreset is also reponsible for setting cable type.
2420 * This function is to be used as standard callback for
2421 * ata_drive_*_reset().
2424 * Kernel thread context (may sleep)
2426 void ata_std_postreset(struct ata_port
*ap
, unsigned int *classes
)
2430 /* set cable type */
2431 if (ap
->cbl
== ATA_CBL_NONE
&& ap
->flags
& ATA_FLAG_SATA
)
2432 ap
->cbl
= ATA_CBL_SATA
;
2434 /* print link status */
2435 if (ap
->cbl
== ATA_CBL_SATA
)
2436 sata_print_link_status(ap
);
2438 /* bail out if no device is present */
2439 if (classes
[0] == ATA_DEV_NONE
&& classes
[1] == ATA_DEV_NONE
) {
2440 DPRINTK("EXIT, no device\n");
2444 /* is double-select really necessary? */
2445 if (classes
[0] != ATA_DEV_NONE
)
2446 ap
->ops
->dev_select(ap
, 1);
2447 if (classes
[1] != ATA_DEV_NONE
)
2448 ap
->ops
->dev_select(ap
, 0);
2450 /* re-enable interrupts & set up device control */
2451 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2458 * ata_std_probe_reset - standard probe reset method
2459 * @ap: prot to perform probe-reset
2460 * @classes: resulting classes of attached devices
2462 * The stock off-the-shelf ->probe_reset method.
2465 * Kernel thread context (may sleep)
2468 * 0 on success, -errno otherwise.
2470 int ata_std_probe_reset(struct ata_port
*ap
, unsigned int *classes
)
2472 ata_reset_fn_t hardreset
;
2475 if (ap
->flags
& ATA_FLAG_SATA
&& ap
->ops
->scr_read
)
2476 hardreset
= sata_std_hardreset
;
2478 return ata_drive_probe_reset(ap
, ata_std_softreset
, hardreset
,
2479 ata_std_postreset
, classes
);
2482 static int do_probe_reset(struct ata_port
*ap
, ata_reset_fn_t reset
,
2483 ata_postreset_fn_t postreset
,
2484 unsigned int *classes
)
2488 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2489 classes
[i
] = ATA_DEV_UNKNOWN
;
2491 rc
= reset(ap
, 0, classes
);
2495 /* If any class isn't ATA_DEV_UNKNOWN, consider classification
2496 * is complete and convert all ATA_DEV_UNKNOWN to
2499 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2500 if (classes
[i
] != ATA_DEV_UNKNOWN
)
2503 if (i
< ATA_MAX_DEVICES
)
2504 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
2505 if (classes
[i
] == ATA_DEV_UNKNOWN
)
2506 classes
[i
] = ATA_DEV_NONE
;
2509 postreset(ap
, classes
);
2511 return classes
[0] != ATA_DEV_UNKNOWN
? 0 : -ENODEV
;
2515 * ata_drive_probe_reset - Perform probe reset with given methods
2516 * @ap: port to reset
2517 * @softreset: softreset method (can be NULL)
2518 * @hardreset: hardreset method (can be NULL)
2519 * @postreset: postreset method (can be NULL)
2520 * @classes: resulting classes of attached devices
2522 * Reset the specified port and classify attached devices using
2523 * given methods. This function prefers softreset but tries all
2524 * possible reset sequences to reset and classify devices. This
2525 * function is intended to be used for constructing ->probe_reset
2526 * callback by low level drivers.
2528 * Reset methods should follow the following rules.
2530 * - Return 0 on sucess, -errno on failure.
2531 * - If classification is supported, fill classes[] with
2532 * recognized class codes.
2533 * - If classification is not supported, leave classes[] alone.
2534 * - If verbose is non-zero, print error message on failure;
2535 * otherwise, shut up.
2538 * Kernel thread context (may sleep)
2541 * 0 on success, -EINVAL if no reset method is avaliable, -ENODEV
2542 * if classification fails, and any error code from reset
2545 int ata_drive_probe_reset(struct ata_port
*ap
,
2546 ata_reset_fn_t softreset
, ata_reset_fn_t hardreset
,
2547 ata_postreset_fn_t postreset
, unsigned int *classes
)
2552 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2560 rc
= do_probe_reset(ap
, hardreset
, postreset
, classes
);
2561 if (rc
== 0 || rc
!= -ENODEV
)
2565 rc
= do_probe_reset(ap
, softreset
, postreset
, classes
);
2570 static void ata_pr_blacklisted(const struct ata_port
*ap
,
2571 const struct ata_device
*dev
)
2573 printk(KERN_WARNING
"ata%u: dev %u is on DMA blacklist, disabling DMA\n",
2574 ap
->id
, dev
->devno
);
2577 static const char * const ata_dma_blacklist
[] = {
2596 "Toshiba CD-ROM XM-6202B",
2597 "TOSHIBA CD-ROM XM-1702BC",
2599 "E-IDE CD-ROM CR-840",
2602 "SAMSUNG CD-ROM SC-148C",
2603 "SAMSUNG CD-ROM SC",
2605 "ATAPI CD-ROM DRIVE 40X MAXIMUM",
2609 static int ata_dma_blacklisted(const struct ata_device
*dev
)
2611 unsigned char model_num
[40];
2616 ata_dev_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2619 len
= strnlen(s
, sizeof(model_num
));
2621 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2622 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2627 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
++)
2628 if (!strncmp(ata_dma_blacklist
[i
], s
, len
))
2634 static unsigned int ata_get_mode_mask(const struct ata_port
*ap
, int shift
)
2636 const struct ata_device
*master
, *slave
;
2639 master
= &ap
->device
[0];
2640 slave
= &ap
->device
[1];
2642 assert (ata_dev_present(master
) || ata_dev_present(slave
));
2644 if (shift
== ATA_SHIFT_UDMA
) {
2645 mask
= ap
->udma_mask
;
2646 if (ata_dev_present(master
)) {
2647 mask
&= (master
->id
[ATA_ID_UDMA_MODES
] & 0xff);
2648 if (ata_dma_blacklisted(master
)) {
2650 ata_pr_blacklisted(ap
, master
);
2653 if (ata_dev_present(slave
)) {
2654 mask
&= (slave
->id
[ATA_ID_UDMA_MODES
] & 0xff);
2655 if (ata_dma_blacklisted(slave
)) {
2657 ata_pr_blacklisted(ap
, slave
);
2661 else if (shift
== ATA_SHIFT_MWDMA
) {
2662 mask
= ap
->mwdma_mask
;
2663 if (ata_dev_present(master
)) {
2664 mask
&= (master
->id
[ATA_ID_MWDMA_MODES
] & 0x07);
2665 if (ata_dma_blacklisted(master
)) {
2667 ata_pr_blacklisted(ap
, master
);
2670 if (ata_dev_present(slave
)) {
2671 mask
&= (slave
->id
[ATA_ID_MWDMA_MODES
] & 0x07);
2672 if (ata_dma_blacklisted(slave
)) {
2674 ata_pr_blacklisted(ap
, slave
);
2678 else if (shift
== ATA_SHIFT_PIO
) {
2679 mask
= ap
->pio_mask
;
2680 if (ata_dev_present(master
)) {
2681 /* spec doesn't return explicit support for
2682 * PIO0-2, so we fake it
2684 u16 tmp_mode
= master
->id
[ATA_ID_PIO_MODES
] & 0x03;
2689 if (ata_dev_present(slave
)) {
2690 /* spec doesn't return explicit support for
2691 * PIO0-2, so we fake it
2693 u16 tmp_mode
= slave
->id
[ATA_ID_PIO_MODES
] & 0x03;
2700 mask
= 0xffffffff; /* shut up compiler warning */
2707 /* find greatest bit */
2708 static int fgb(u32 bitmap
)
2713 for (i
= 0; i
< 32; i
++)
2714 if (bitmap
& (1 << i
))
2721 * ata_choose_xfer_mode - attempt to find best transfer mode
2722 * @ap: Port for which an xfer mode will be selected
2723 * @xfer_mode_out: (output) SET FEATURES - XFER MODE code
2724 * @xfer_shift_out: (output) bit shift that selects this mode
2726 * Based on host and device capabilities, determine the
2727 * maximum transfer mode that is amenable to all.
2730 * PCI/etc. bus probe sem.
2733 * Zero on success, negative on error.
2736 static int ata_choose_xfer_mode(const struct ata_port
*ap
,
2738 unsigned int *xfer_shift_out
)
2740 unsigned int mask
, shift
;
2743 for (i
= 0; i
< ARRAY_SIZE(xfer_mode_classes
); i
++) {
2744 shift
= xfer_mode_classes
[i
].shift
;
2745 mask
= ata_get_mode_mask(ap
, shift
);
2749 *xfer_mode_out
= xfer_mode_classes
[i
].base
+ x
;
2750 *xfer_shift_out
= shift
;
2759 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2760 * @ap: Port associated with device @dev
2761 * @dev: Device to which command will be sent
2763 * Issue SET FEATURES - XFER MODE command to device @dev
2767 * PCI/etc. bus probe sem.
2770 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
)
2772 struct ata_taskfile tf
;
2774 /* set up set-features taskfile */
2775 DPRINTK("set features - xfer mode\n");
2777 ata_tf_init(ap
, &tf
, dev
->devno
);
2778 tf
.command
= ATA_CMD_SET_FEATURES
;
2779 tf
.feature
= SETFEATURES_XFER
;
2780 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2781 tf
.protocol
= ATA_PROT_NODATA
;
2782 tf
.nsect
= dev
->xfer_mode
;
2784 if (ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0)) {
2785 printk(KERN_ERR
"ata%u: failed to set xfermode, disabled\n",
2787 ata_port_disable(ap
);
2794 * ata_dev_reread_id - Reread the device identify device info
2795 * @ap: port where the device is
2796 * @dev: device to reread the identify device info
2801 static void ata_dev_reread_id(struct ata_port
*ap
, struct ata_device
*dev
)
2803 struct ata_taskfile tf
;
2805 ata_tf_init(ap
, &tf
, dev
->devno
);
2807 if (dev
->class == ATA_DEV_ATA
) {
2808 tf
.command
= ATA_CMD_ID_ATA
;
2809 DPRINTK("do ATA identify\n");
2811 tf
.command
= ATA_CMD_ID_ATAPI
;
2812 DPRINTK("do ATAPI identify\n");
2815 tf
.flags
|= ATA_TFLAG_DEVICE
;
2816 tf
.protocol
= ATA_PROT_PIO
;
2818 if (ata_exec_internal(ap
, dev
, &tf
, DMA_FROM_DEVICE
,
2819 dev
->id
, sizeof(dev
->id
)))
2822 swap_buf_le16(dev
->id
, ATA_ID_WORDS
);
2830 printk(KERN_ERR
"ata%u: failed to reread ID, disabled\n", ap
->id
);
2831 ata_port_disable(ap
);
2835 * ata_dev_init_params - Issue INIT DEV PARAMS command
2836 * @ap: Port associated with device @dev
2837 * @dev: Device to which command will be sent
2842 static void ata_dev_init_params(struct ata_port
*ap
, struct ata_device
*dev
)
2844 struct ata_taskfile tf
;
2845 u16 sectors
= dev
->id
[6];
2846 u16 heads
= dev
->id
[3];
2848 /* Number of sectors per track 1-255. Number of heads 1-16 */
2849 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
2852 /* set up init dev params taskfile */
2853 DPRINTK("init dev params \n");
2855 ata_tf_init(ap
, &tf
, dev
->devno
);
2856 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
2857 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2858 tf
.protocol
= ATA_PROT_NODATA
;
2860 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
2862 if (ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0)) {
2863 printk(KERN_ERR
"ata%u: failed to init parameters, disabled\n",
2865 ata_port_disable(ap
);
2872 * ata_sg_clean - Unmap DMA memory associated with command
2873 * @qc: Command containing DMA memory to be released
2875 * Unmap all mapped DMA memory associated with this command.
2878 * spin_lock_irqsave(host_set lock)
2881 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
2883 struct ata_port
*ap
= qc
->ap
;
2884 struct scatterlist
*sg
= qc
->__sg
;
2885 int dir
= qc
->dma_dir
;
2886 void *pad_buf
= NULL
;
2888 assert(qc
->flags
& ATA_QCFLAG_DMAMAP
);
2891 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
2892 assert(qc
->n_elem
== 1);
2894 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
2896 /* if we padded the buffer out to 32-bit bound, and data
2897 * xfer direction is from-device, we must copy from the
2898 * pad buffer back into the supplied buffer
2900 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
2901 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2903 if (qc
->flags
& ATA_QCFLAG_SG
) {
2905 dma_unmap_sg(ap
->host_set
->dev
, sg
, qc
->n_elem
, dir
);
2906 /* restore last sg */
2907 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
2909 struct scatterlist
*psg
= &qc
->pad_sgent
;
2910 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
2911 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
2912 kunmap_atomic(addr
, KM_IRQ0
);
2915 if (sg_dma_len(&sg
[0]) > 0)
2916 dma_unmap_single(ap
->host_set
->dev
,
2917 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
2920 sg
->length
+= qc
->pad_len
;
2922 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
2923 pad_buf
, qc
->pad_len
);
2926 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
2931 * ata_fill_sg - Fill PCI IDE PRD table
2932 * @qc: Metadata associated with taskfile to be transferred
2934 * Fill PCI IDE PRD (scatter-gather) table with segments
2935 * associated with the current disk command.
2938 * spin_lock_irqsave(host_set lock)
2941 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
2943 struct ata_port
*ap
= qc
->ap
;
2944 struct scatterlist
*sg
;
2947 assert(qc
->__sg
!= NULL
);
2948 assert(qc
->n_elem
> 0);
2951 ata_for_each_sg(sg
, qc
) {
2955 /* determine if physical DMA addr spans 64K boundary.
2956 * Note h/w doesn't support 64-bit, so we unconditionally
2957 * truncate dma_addr_t to u32.
2959 addr
= (u32
) sg_dma_address(sg
);
2960 sg_len
= sg_dma_len(sg
);
2963 offset
= addr
& 0xffff;
2965 if ((offset
+ sg_len
) > 0x10000)
2966 len
= 0x10000 - offset
;
2968 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
2969 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
2970 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
2979 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
2982 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2983 * @qc: Metadata associated with taskfile to check
2985 * Allow low-level driver to filter ATA PACKET commands, returning
2986 * a status indicating whether or not it is OK to use DMA for the
2987 * supplied PACKET command.
2990 * spin_lock_irqsave(host_set lock)
2992 * RETURNS: 0 when ATAPI DMA can be used
2995 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
2997 struct ata_port
*ap
= qc
->ap
;
2998 int rc
= 0; /* Assume ATAPI DMA is OK by default */
3000 if (ap
->ops
->check_atapi_dma
)
3001 rc
= ap
->ops
->check_atapi_dma(qc
);
3006 * ata_qc_prep - Prepare taskfile for submission
3007 * @qc: Metadata associated with taskfile to be prepared
3009 * Prepare ATA taskfile for submission.
3012 * spin_lock_irqsave(host_set lock)
3014 void ata_qc_prep(struct ata_queued_cmd
*qc
)
3016 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3023 * ata_sg_init_one - Associate command with memory buffer
3024 * @qc: Command to be associated
3025 * @buf: Memory buffer
3026 * @buflen: Length of memory buffer, in bytes.
3028 * Initialize the data-related elements of queued_cmd @qc
3029 * to point to a single memory buffer, @buf of byte length @buflen.
3032 * spin_lock_irqsave(host_set lock)
3035 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
3037 struct scatterlist
*sg
;
3039 qc
->flags
|= ATA_QCFLAG_SINGLE
;
3041 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
3042 qc
->__sg
= &qc
->sgent
;
3044 qc
->orig_n_elem
= 1;
3048 sg_init_one(sg
, buf
, buflen
);
3052 * ata_sg_init - Associate command with scatter-gather table.
3053 * @qc: Command to be associated
3054 * @sg: Scatter-gather table.
3055 * @n_elem: Number of elements in s/g table.
3057 * Initialize the data-related elements of queued_cmd @qc
3058 * to point to a scatter-gather table @sg, containing @n_elem
3062 * spin_lock_irqsave(host_set lock)
3065 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
3066 unsigned int n_elem
)
3068 qc
->flags
|= ATA_QCFLAG_SG
;
3070 qc
->n_elem
= n_elem
;
3071 qc
->orig_n_elem
= n_elem
;
3075 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
3076 * @qc: Command with memory buffer to be mapped.
3078 * DMA-map the memory buffer associated with queued_cmd @qc.
3081 * spin_lock_irqsave(host_set lock)
3084 * Zero on success, negative on error.
3087 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
3089 struct ata_port
*ap
= qc
->ap
;
3090 int dir
= qc
->dma_dir
;
3091 struct scatterlist
*sg
= qc
->__sg
;
3092 dma_addr_t dma_address
;
3094 /* we must lengthen transfers to end on a 32-bit boundary */
3095 qc
->pad_len
= sg
->length
& 3;
3097 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3098 struct scatterlist
*psg
= &qc
->pad_sgent
;
3100 assert(qc
->dev
->class == ATA_DEV_ATAPI
);
3102 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3104 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
3105 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
3108 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3109 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3111 sg
->length
-= qc
->pad_len
;
3113 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
3114 sg
->length
, qc
->pad_len
);
3118 sg_dma_address(sg
) = 0;
3122 dma_address
= dma_map_single(ap
->host_set
->dev
, qc
->buf_virt
,
3124 if (dma_mapping_error(dma_address
)) {
3126 sg
->length
+= qc
->pad_len
;
3130 sg_dma_address(sg
) = dma_address
;
3132 sg_dma_len(sg
) = sg
->length
;
3134 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
3135 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3141 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
3142 * @qc: Command with scatter-gather table to be mapped.
3144 * DMA-map the scatter-gather table associated with queued_cmd @qc.
3147 * spin_lock_irqsave(host_set lock)
3150 * Zero on success, negative on error.
3154 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
3156 struct ata_port
*ap
= qc
->ap
;
3157 struct scatterlist
*sg
= qc
->__sg
;
3158 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
3159 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
3161 VPRINTK("ENTER, ata%u\n", ap
->id
);
3162 assert(qc
->flags
& ATA_QCFLAG_SG
);
3164 /* we must lengthen transfers to end on a 32-bit boundary */
3165 qc
->pad_len
= lsg
->length
& 3;
3167 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3168 struct scatterlist
*psg
= &qc
->pad_sgent
;
3169 unsigned int offset
;
3171 assert(qc
->dev
->class == ATA_DEV_ATAPI
);
3173 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
3176 * psg->page/offset are used to copy to-be-written
3177 * data in this function or read data in ata_sg_clean.
3179 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
3180 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
3181 psg
->offset
= offset_in_page(offset
);
3183 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3184 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
3185 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
3186 kunmap_atomic(addr
, KM_IRQ0
);
3189 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
3190 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
3192 lsg
->length
-= qc
->pad_len
;
3193 if (lsg
->length
== 0)
3196 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
3197 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
3200 pre_n_elem
= qc
->n_elem
;
3201 if (trim_sg
&& pre_n_elem
)
3210 n_elem
= dma_map_sg(ap
->host_set
->dev
, sg
, pre_n_elem
, dir
);
3212 /* restore last sg */
3213 lsg
->length
+= qc
->pad_len
;
3217 DPRINTK("%d sg elements mapped\n", n_elem
);
3220 qc
->n_elem
= n_elem
;
3226 * ata_poll_qc_complete - turn irq back on and finish qc
3227 * @qc: Command to complete
3228 * @err_mask: ATA status register content
3231 * None. (grabs host lock)
3234 void ata_poll_qc_complete(struct ata_queued_cmd
*qc
)
3236 struct ata_port
*ap
= qc
->ap
;
3237 unsigned long flags
;
3239 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
3240 ap
->flags
&= ~ATA_FLAG_NOINTR
;
3242 ata_qc_complete(qc
);
3243 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
3247 * ata_pio_poll - poll using PIO, depending on current state
3248 * @ap: the target ata_port
3251 * None. (executing in kernel thread context)
3254 * timeout value to use
3257 static unsigned long ata_pio_poll(struct ata_port
*ap
)
3259 struct ata_queued_cmd
*qc
;
3261 unsigned int poll_state
= HSM_ST_UNKNOWN
;
3262 unsigned int reg_state
= HSM_ST_UNKNOWN
;
3264 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3267 switch (ap
->hsm_task_state
) {
3270 poll_state
= HSM_ST_POLL
;
3274 case HSM_ST_LAST_POLL
:
3275 poll_state
= HSM_ST_LAST_POLL
;
3276 reg_state
= HSM_ST_LAST
;
3283 status
= ata_chk_status(ap
);
3284 if (status
& ATA_BUSY
) {
3285 if (time_after(jiffies
, ap
->pio_task_timeout
)) {
3286 qc
->err_mask
|= AC_ERR_TIMEOUT
;
3287 ap
->hsm_task_state
= HSM_ST_TMOUT
;
3290 ap
->hsm_task_state
= poll_state
;
3291 return ATA_SHORT_PAUSE
;
3294 ap
->hsm_task_state
= reg_state
;
3299 * ata_pio_complete - check if drive is busy or idle
3300 * @ap: the target ata_port
3303 * None. (executing in kernel thread context)
3306 * Non-zero if qc completed, zero otherwise.
3309 static int ata_pio_complete (struct ata_port
*ap
)
3311 struct ata_queued_cmd
*qc
;
3315 * This is purely heuristic. This is a fast path. Sometimes when
3316 * we enter, BSY will be cleared in a chk-status or two. If not,
3317 * the drive is probably seeking or something. Snooze for a couple
3318 * msecs, then chk-status again. If still busy, fall back to
3319 * HSM_ST_POLL state.
3321 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3322 if (drv_stat
& ATA_BUSY
) {
3324 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3325 if (drv_stat
& ATA_BUSY
) {
3326 ap
->hsm_task_state
= HSM_ST_LAST_POLL
;
3327 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3332 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3335 drv_stat
= ata_wait_idle(ap
);
3336 if (!ata_ok(drv_stat
)) {
3337 qc
->err_mask
|= __ac_err_mask(drv_stat
);
3338 ap
->hsm_task_state
= HSM_ST_ERR
;
3342 ap
->hsm_task_state
= HSM_ST_IDLE
;
3344 assert(qc
->err_mask
== 0);
3345 ata_poll_qc_complete(qc
);
3347 /* another command may start at this point */
3354 * swap_buf_le16 - swap halves of 16-bit words in place
3355 * @buf: Buffer to swap
3356 * @buf_words: Number of 16-bit words in buffer.
3358 * Swap halves of 16-bit words if needed to convert from
3359 * little-endian byte order to native cpu byte order, or
3363 * Inherited from caller.
3365 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
3370 for (i
= 0; i
< buf_words
; i
++)
3371 buf
[i
] = le16_to_cpu(buf
[i
]);
3372 #endif /* __BIG_ENDIAN */
3376 * ata_mmio_data_xfer - Transfer data by MMIO
3377 * @ap: port to read/write
3379 * @buflen: buffer length
3380 * @write_data: read/write
3382 * Transfer data from/to the device data register by MMIO.
3385 * Inherited from caller.
3388 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3389 unsigned int buflen
, int write_data
)
3392 unsigned int words
= buflen
>> 1;
3393 u16
*buf16
= (u16
*) buf
;
3394 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
3396 /* Transfer multiple of 2 bytes */
3398 for (i
= 0; i
< words
; i
++)
3399 writew(le16_to_cpu(buf16
[i
]), mmio
);
3401 for (i
= 0; i
< words
; i
++)
3402 buf16
[i
] = cpu_to_le16(readw(mmio
));
3405 /* Transfer trailing 1 byte, if any. */
3406 if (unlikely(buflen
& 0x01)) {
3407 u16 align_buf
[1] = { 0 };
3408 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3411 memcpy(align_buf
, trailing_buf
, 1);
3412 writew(le16_to_cpu(align_buf
[0]), mmio
);
3414 align_buf
[0] = cpu_to_le16(readw(mmio
));
3415 memcpy(trailing_buf
, align_buf
, 1);
3421 * ata_pio_data_xfer - Transfer data by PIO
3422 * @ap: port to read/write
3424 * @buflen: buffer length
3425 * @write_data: read/write
3427 * Transfer data from/to the device data register by PIO.
3430 * Inherited from caller.
3433 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3434 unsigned int buflen
, int write_data
)
3436 unsigned int words
= buflen
>> 1;
3438 /* Transfer multiple of 2 bytes */
3440 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
3442 insw(ap
->ioaddr
.data_addr
, buf
, words
);
3444 /* Transfer trailing 1 byte, if any. */
3445 if (unlikely(buflen
& 0x01)) {
3446 u16 align_buf
[1] = { 0 };
3447 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3450 memcpy(align_buf
, trailing_buf
, 1);
3451 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3453 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
3454 memcpy(trailing_buf
, align_buf
, 1);
3460 * ata_data_xfer - Transfer data from/to the data register.
3461 * @ap: port to read/write
3463 * @buflen: buffer length
3464 * @do_write: read/write
3466 * Transfer data from/to the device data register.
3469 * Inherited from caller.
3472 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3473 unsigned int buflen
, int do_write
)
3475 /* Make the crap hardware pay the costs not the good stuff */
3476 if (unlikely(ap
->flags
& ATA_FLAG_IRQ_MASK
)) {
3477 unsigned long flags
;
3478 local_irq_save(flags
);
3479 if (ap
->flags
& ATA_FLAG_MMIO
)
3480 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3482 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3483 local_irq_restore(flags
);
3485 if (ap
->flags
& ATA_FLAG_MMIO
)
3486 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3488 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3493 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3494 * @qc: Command on going
3496 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3499 * Inherited from caller.
3502 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3504 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3505 struct scatterlist
*sg
= qc
->__sg
;
3506 struct ata_port
*ap
= qc
->ap
;
3508 unsigned int offset
;
3511 if (qc
->cursect
== (qc
->nsect
- 1))
3512 ap
->hsm_task_state
= HSM_ST_LAST
;
3514 page
= sg
[qc
->cursg
].page
;
3515 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
3517 /* get the current page and offset */
3518 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3519 offset
%= PAGE_SIZE
;
3521 buf
= kmap(page
) + offset
;
3526 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
3531 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3533 /* do the actual data transfer */
3534 do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3535 ata_data_xfer(ap
, buf
, ATA_SECT_SIZE
, do_write
);
3541 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3542 * @qc: Command on going
3543 * @bytes: number of bytes
3545 * Transfer Transfer data from/to the ATAPI device.
3548 * Inherited from caller.
3552 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
3554 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3555 struct scatterlist
*sg
= qc
->__sg
;
3556 struct ata_port
*ap
= qc
->ap
;
3559 unsigned int offset
, count
;
3561 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
3562 ap
->hsm_task_state
= HSM_ST_LAST
;
3565 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
3567 * The end of qc->sg is reached and the device expects
3568 * more data to transfer. In order not to overrun qc->sg
3569 * and fulfill length specified in the byte count register,
3570 * - for read case, discard trailing data from the device
3571 * - for write case, padding zero data to the device
3573 u16 pad_buf
[1] = { 0 };
3574 unsigned int words
= bytes
>> 1;
3577 if (words
) /* warning if bytes > 1 */
3578 printk(KERN_WARNING
"ata%u: %u bytes trailing data\n",
3581 for (i
= 0; i
< words
; i
++)
3582 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
3584 ap
->hsm_task_state
= HSM_ST_LAST
;
3588 sg
= &qc
->__sg
[qc
->cursg
];
3591 offset
= sg
->offset
+ qc
->cursg_ofs
;
3593 /* get the current page and offset */
3594 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3595 offset
%= PAGE_SIZE
;
3597 /* don't overrun current sg */
3598 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
3600 /* don't cross page boundaries */
3601 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
3603 buf
= kmap(page
) + offset
;
3606 qc
->curbytes
+= count
;
3607 qc
->cursg_ofs
+= count
;
3609 if (qc
->cursg_ofs
== sg
->length
) {
3614 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3616 /* do the actual data transfer */
3617 ata_data_xfer(ap
, buf
, count
, do_write
);
3626 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3627 * @qc: Command on going
3629 * Transfer Transfer data from/to the ATAPI device.
3632 * Inherited from caller.
3635 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3637 struct ata_port
*ap
= qc
->ap
;
3638 struct ata_device
*dev
= qc
->dev
;
3639 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3640 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3642 ap
->ops
->tf_read(ap
, &qc
->tf
);
3643 ireason
= qc
->tf
.nsect
;
3644 bc_lo
= qc
->tf
.lbam
;
3645 bc_hi
= qc
->tf
.lbah
;
3646 bytes
= (bc_hi
<< 8) | bc_lo
;
3648 /* shall be cleared to zero, indicating xfer of data */
3649 if (ireason
& (1 << 0))
3652 /* make sure transfer direction matches expected */
3653 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3654 if (do_write
!= i_write
)
3657 __atapi_pio_bytes(qc
, bytes
);
3662 printk(KERN_INFO
"ata%u: dev %u: ATAPI check failed\n",
3663 ap
->id
, dev
->devno
);
3664 qc
->err_mask
|= AC_ERR_HSM
;
3665 ap
->hsm_task_state
= HSM_ST_ERR
;
3669 * ata_pio_block - start PIO on a block
3670 * @ap: the target ata_port
3673 * None. (executing in kernel thread context)
3676 static void ata_pio_block(struct ata_port
*ap
)
3678 struct ata_queued_cmd
*qc
;
3682 * This is purely heuristic. This is a fast path.
3683 * Sometimes when we enter, BSY will be cleared in
3684 * a chk-status or two. If not, the drive is probably seeking
3685 * or something. Snooze for a couple msecs, then
3686 * chk-status again. If still busy, fall back to
3687 * HSM_ST_POLL state.
3689 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
3690 if (status
& ATA_BUSY
) {
3692 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3693 if (status
& ATA_BUSY
) {
3694 ap
->hsm_task_state
= HSM_ST_POLL
;
3695 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3700 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3704 if (status
& (ATA_ERR
| ATA_DF
)) {
3705 qc
->err_mask
|= AC_ERR_DEV
;
3706 ap
->hsm_task_state
= HSM_ST_ERR
;
3710 /* transfer data if any */
3711 if (is_atapi_taskfile(&qc
->tf
)) {
3712 /* DRQ=0 means no more data to transfer */
3713 if ((status
& ATA_DRQ
) == 0) {
3714 ap
->hsm_task_state
= HSM_ST_LAST
;
3718 atapi_pio_bytes(qc
);
3720 /* handle BSY=0, DRQ=0 as error */
3721 if ((status
& ATA_DRQ
) == 0) {
3722 qc
->err_mask
|= AC_ERR_HSM
;
3723 ap
->hsm_task_state
= HSM_ST_ERR
;
3731 static void ata_pio_error(struct ata_port
*ap
)
3733 struct ata_queued_cmd
*qc
;
3735 printk(KERN_WARNING
"ata%u: PIO error\n", ap
->id
);
3737 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3740 /* make sure qc->err_mask is available to
3741 * know what's wrong and recover
3743 assert(qc
->err_mask
);
3745 ap
->hsm_task_state
= HSM_ST_IDLE
;
3747 ata_poll_qc_complete(qc
);
3750 static void ata_pio_task(void *_data
)
3752 struct ata_port
*ap
= _data
;
3753 unsigned long timeout
;
3760 switch (ap
->hsm_task_state
) {
3769 qc_completed
= ata_pio_complete(ap
);
3773 case HSM_ST_LAST_POLL
:
3774 timeout
= ata_pio_poll(ap
);
3784 ata_queue_delayed_pio_task(ap
, timeout
);
3785 else if (!qc_completed
)
3790 * ata_qc_timeout - Handle timeout of queued command
3791 * @qc: Command that timed out
3793 * Some part of the kernel (currently, only the SCSI layer)
3794 * has noticed that the active command on port @ap has not
3795 * completed after a specified length of time. Handle this
3796 * condition by disabling DMA (if necessary) and completing
3797 * transactions, with error if necessary.
3799 * This also handles the case of the "lost interrupt", where
3800 * for some reason (possibly hardware bug, possibly driver bug)
3801 * an interrupt was not delivered to the driver, even though the
3802 * transaction completed successfully.
3805 * Inherited from SCSI layer (none, can sleep)
3808 static void ata_qc_timeout(struct ata_queued_cmd
*qc
)
3810 struct ata_port
*ap
= qc
->ap
;
3811 struct ata_host_set
*host_set
= ap
->host_set
;
3812 u8 host_stat
= 0, drv_stat
;
3813 unsigned long flags
;
3817 ata_flush_pio_tasks(ap
);
3818 ap
->hsm_task_state
= HSM_ST_IDLE
;
3820 spin_lock_irqsave(&host_set
->lock
, flags
);
3822 switch (qc
->tf
.protocol
) {
3825 case ATA_PROT_ATAPI_DMA
:
3826 host_stat
= ap
->ops
->bmdma_status(ap
);
3828 /* before we do anything else, clear DMA-Start bit */
3829 ap
->ops
->bmdma_stop(qc
);
3835 drv_stat
= ata_chk_status(ap
);
3837 /* ack bmdma irq events */
3838 ap
->ops
->irq_clear(ap
);
3840 printk(KERN_ERR
"ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3841 ap
->id
, qc
->tf
.command
, drv_stat
, host_stat
);
3843 /* complete taskfile transaction */
3844 qc
->err_mask
|= ac_err_mask(drv_stat
);
3848 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3850 ata_eh_qc_complete(qc
);
3856 * ata_eng_timeout - Handle timeout of queued command
3857 * @ap: Port on which timed-out command is active
3859 * Some part of the kernel (currently, only the SCSI layer)
3860 * has noticed that the active command on port @ap has not
3861 * completed after a specified length of time. Handle this
3862 * condition by disabling DMA (if necessary) and completing
3863 * transactions, with error if necessary.
3865 * This also handles the case of the "lost interrupt", where
3866 * for some reason (possibly hardware bug, possibly driver bug)
3867 * an interrupt was not delivered to the driver, even though the
3868 * transaction completed successfully.
3871 * Inherited from SCSI layer (none, can sleep)
3874 void ata_eng_timeout(struct ata_port
*ap
)
3876 struct ata_queued_cmd
*qc
;
3880 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3884 printk(KERN_ERR
"ata%u: BUG: timeout without command\n",
3894 * ata_qc_new - Request an available ATA command, for queueing
3895 * @ap: Port associated with device @dev
3896 * @dev: Device from whom we request an available command structure
3902 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
3904 struct ata_queued_cmd
*qc
= NULL
;
3907 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++)
3908 if (!test_and_set_bit(i
, &ap
->qactive
)) {
3909 qc
= ata_qc_from_tag(ap
, i
);
3920 * ata_qc_new_init - Request an available ATA command, and initialize it
3921 * @ap: Port associated with device @dev
3922 * @dev: Device from whom we request an available command structure
3928 struct ata_queued_cmd
*ata_qc_new_init(struct ata_port
*ap
,
3929 struct ata_device
*dev
)
3931 struct ata_queued_cmd
*qc
;
3933 qc
= ata_qc_new(ap
);
3946 * ata_qc_free - free unused ata_queued_cmd
3947 * @qc: Command to complete
3949 * Designed to free unused ata_queued_cmd object
3950 * in case something prevents using it.
3953 * spin_lock_irqsave(host_set lock)
3955 void ata_qc_free(struct ata_queued_cmd
*qc
)
3957 struct ata_port
*ap
= qc
->ap
;
3960 assert(qc
!= NULL
); /* ata_qc_from_tag _might_ return NULL */
3964 if (likely(ata_tag_valid(tag
))) {
3965 if (tag
== ap
->active_tag
)
3966 ap
->active_tag
= ATA_TAG_POISON
;
3967 qc
->tag
= ATA_TAG_POISON
;
3968 clear_bit(tag
, &ap
->qactive
);
3973 * ata_qc_complete - Complete an active ATA command
3974 * @qc: Command to complete
3975 * @err_mask: ATA Status register contents
3977 * Indicate to the mid and upper layers that an ATA
3978 * command has completed, with either an ok or not-ok status.
3981 * spin_lock_irqsave(host_set lock)
3984 void ata_qc_complete(struct ata_queued_cmd
*qc
)
3986 assert(qc
!= NULL
); /* ata_qc_from_tag _might_ return NULL */
3987 assert(qc
->flags
& ATA_QCFLAG_ACTIVE
);
3989 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3992 /* atapi: mark qc as inactive to prevent the interrupt handler
3993 * from completing the command twice later, before the error handler
3994 * is called. (when rc != 0 and atapi request sense is needed)
3996 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
3998 /* call completion callback */
3999 qc
->complete_fn(qc
);
4002 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
4004 struct ata_port
*ap
= qc
->ap
;
4006 switch (qc
->tf
.protocol
) {
4008 case ATA_PROT_ATAPI_DMA
:
4011 case ATA_PROT_ATAPI
:
4013 case ATA_PROT_PIO_MULT
:
4014 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
4027 * ata_qc_issue - issue taskfile to device
4028 * @qc: command to issue to device
4030 * Prepare an ATA command to submission to device.
4031 * This includes mapping the data into a DMA-able
4032 * area, filling in the S/G table, and finally
4033 * writing the taskfile to hardware, starting the command.
4036 * spin_lock_irqsave(host_set lock)
4039 * Zero on success, AC_ERR_* mask on failure
4042 unsigned int ata_qc_issue(struct ata_queued_cmd
*qc
)
4044 struct ata_port
*ap
= qc
->ap
;
4046 if (ata_should_dma_map(qc
)) {
4047 if (qc
->flags
& ATA_QCFLAG_SG
) {
4048 if (ata_sg_setup(qc
))
4050 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
4051 if (ata_sg_setup_one(qc
))
4055 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4058 ap
->ops
->qc_prep(qc
);
4060 qc
->ap
->active_tag
= qc
->tag
;
4061 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
4063 return ap
->ops
->qc_issue(qc
);
4066 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
4067 return AC_ERR_SYSTEM
;
4072 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
4073 * @qc: command to issue to device
4075 * Using various libata functions and hooks, this function
4076 * starts an ATA command. ATA commands are grouped into
4077 * classes called "protocols", and issuing each type of protocol
4078 * is slightly different.
4080 * May be used as the qc_issue() entry in ata_port_operations.
4083 * spin_lock_irqsave(host_set lock)
4086 * Zero on success, AC_ERR_* mask on failure
4089 unsigned int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
4091 struct ata_port
*ap
= qc
->ap
;
4093 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
4095 switch (qc
->tf
.protocol
) {
4096 case ATA_PROT_NODATA
:
4097 ata_tf_to_host(ap
, &qc
->tf
);
4101 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4102 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4103 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4106 case ATA_PROT_PIO
: /* load tf registers, initiate polling pio */
4107 ata_qc_set_polling(qc
);
4108 ata_tf_to_host(ap
, &qc
->tf
);
4109 ap
->hsm_task_state
= HSM_ST
;
4110 ata_queue_pio_task(ap
);
4113 case ATA_PROT_ATAPI
:
4114 ata_qc_set_polling(qc
);
4115 ata_tf_to_host(ap
, &qc
->tf
);
4116 ata_queue_packet_task(ap
);
4119 case ATA_PROT_ATAPI_NODATA
:
4120 ap
->flags
|= ATA_FLAG_NOINTR
;
4121 ata_tf_to_host(ap
, &qc
->tf
);
4122 ata_queue_packet_task(ap
);
4125 case ATA_PROT_ATAPI_DMA
:
4126 ap
->flags
|= ATA_FLAG_NOINTR
;
4127 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
4128 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
4129 ata_queue_packet_task(ap
);
4134 return AC_ERR_SYSTEM
;
4141 * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
4142 * @qc: Info associated with this ATA transaction.
4145 * spin_lock_irqsave(host_set lock)
4148 static void ata_bmdma_setup_mmio (struct ata_queued_cmd
*qc
)
4150 struct ata_port
*ap
= qc
->ap
;
4151 unsigned int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4153 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
4155 /* load PRD table addr. */
4156 mb(); /* make sure PRD table writes are visible to controller */
4157 writel(ap
->prd_dma
, mmio
+ ATA_DMA_TABLE_OFS
);
4159 /* specify data direction, triple-check start bit is clear */
4160 dmactl
= readb(mmio
+ ATA_DMA_CMD
);
4161 dmactl
&= ~(ATA_DMA_WR
| ATA_DMA_START
);
4163 dmactl
|= ATA_DMA_WR
;
4164 writeb(dmactl
, mmio
+ ATA_DMA_CMD
);
4166 /* issue r/w command */
4167 ap
->ops
->exec_command(ap
, &qc
->tf
);
4171 * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
4172 * @qc: Info associated with this ATA transaction.
4175 * spin_lock_irqsave(host_set lock)
4178 static void ata_bmdma_start_mmio (struct ata_queued_cmd
*qc
)
4180 struct ata_port
*ap
= qc
->ap
;
4181 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
4184 /* start host DMA transaction */
4185 dmactl
= readb(mmio
+ ATA_DMA_CMD
);
4186 writeb(dmactl
| ATA_DMA_START
, mmio
+ ATA_DMA_CMD
);
4188 /* Strictly, one may wish to issue a readb() here, to
4189 * flush the mmio write. However, control also passes
4190 * to the hardware at this point, and it will interrupt
4191 * us when we are to resume control. So, in effect,
4192 * we don't care when the mmio write flushes.
4193 * Further, a read of the DMA status register _immediately_
4194 * following the write may not be what certain flaky hardware
4195 * is expected, so I think it is best to not add a readb()
4196 * without first all the MMIO ATA cards/mobos.
4197 * Or maybe I'm just being paranoid.
4202 * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO)
4203 * @qc: Info associated with this ATA transaction.
4206 * spin_lock_irqsave(host_set lock)
4209 static void ata_bmdma_setup_pio (struct ata_queued_cmd
*qc
)
4211 struct ata_port
*ap
= qc
->ap
;
4212 unsigned int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
4215 /* load PRD table addr. */
4216 outl(ap
->prd_dma
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_TABLE_OFS
);
4218 /* specify data direction, triple-check start bit is clear */
4219 dmactl
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
4220 dmactl
&= ~(ATA_DMA_WR
| ATA_DMA_START
);
4222 dmactl
|= ATA_DMA_WR
;
4223 outb(dmactl
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
4225 /* issue r/w command */
4226 ap
->ops
->exec_command(ap
, &qc
->tf
);
4230 * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO)
4231 * @qc: Info associated with this ATA transaction.
4234 * spin_lock_irqsave(host_set lock)
4237 static void ata_bmdma_start_pio (struct ata_queued_cmd
*qc
)
4239 struct ata_port
*ap
= qc
->ap
;
4242 /* start host DMA transaction */
4243 dmactl
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
4244 outb(dmactl
| ATA_DMA_START
,
4245 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
4250 * ata_bmdma_start - Start a PCI IDE BMDMA transaction
4251 * @qc: Info associated with this ATA transaction.
4253 * Writes the ATA_DMA_START flag to the DMA command register.
4255 * May be used as the bmdma_start() entry in ata_port_operations.
4258 * spin_lock_irqsave(host_set lock)
4260 void ata_bmdma_start(struct ata_queued_cmd
*qc
)
4262 if (qc
->ap
->flags
& ATA_FLAG_MMIO
)
4263 ata_bmdma_start_mmio(qc
);
4265 ata_bmdma_start_pio(qc
);
4270 * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
4271 * @qc: Info associated with this ATA transaction.
4273 * Writes address of PRD table to device's PRD Table Address
4274 * register, sets the DMA control register, and calls
4275 * ops->exec_command() to start the transfer.
4277 * May be used as the bmdma_setup() entry in ata_port_operations.
4280 * spin_lock_irqsave(host_set lock)
4282 void ata_bmdma_setup(struct ata_queued_cmd
*qc
)
4284 if (qc
->ap
->flags
& ATA_FLAG_MMIO
)
4285 ata_bmdma_setup_mmio(qc
);
4287 ata_bmdma_setup_pio(qc
);
4292 * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
4293 * @ap: Port associated with this ATA transaction.
4295 * Clear interrupt and error flags in DMA status register.
4297 * May be used as the irq_clear() entry in ata_port_operations.
4300 * spin_lock_irqsave(host_set lock)
4303 void ata_bmdma_irq_clear(struct ata_port
*ap
)
4305 if (ap
->flags
& ATA_FLAG_MMIO
) {
4306 void __iomem
*mmio
= ((void __iomem
*) ap
->ioaddr
.bmdma_addr
) + ATA_DMA_STATUS
;
4307 writeb(readb(mmio
), mmio
);
4309 unsigned long addr
= ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
;
4310 outb(inb(addr
), addr
);
4317 * ata_bmdma_status - Read PCI IDE BMDMA status
4318 * @ap: Port associated with this ATA transaction.
4320 * Read and return BMDMA status register.
4322 * May be used as the bmdma_status() entry in ata_port_operations.
4325 * spin_lock_irqsave(host_set lock)
4328 u8
ata_bmdma_status(struct ata_port
*ap
)
4331 if (ap
->flags
& ATA_FLAG_MMIO
) {
4332 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
4333 host_stat
= readb(mmio
+ ATA_DMA_STATUS
);
4335 host_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
4341 * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
4342 * @qc: Command we are ending DMA for
4344 * Clears the ATA_DMA_START flag in the dma control register
4346 * May be used as the bmdma_stop() entry in ata_port_operations.
4349 * spin_lock_irqsave(host_set lock)
4352 void ata_bmdma_stop(struct ata_queued_cmd
*qc
)
4354 struct ata_port
*ap
= qc
->ap
;
4355 if (ap
->flags
& ATA_FLAG_MMIO
) {
4356 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
4358 /* clear start/stop bit */
4359 writeb(readb(mmio
+ ATA_DMA_CMD
) & ~ATA_DMA_START
,
4360 mmio
+ ATA_DMA_CMD
);
4362 /* clear start/stop bit */
4363 outb(inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
) & ~ATA_DMA_START
,
4364 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
4367 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
4368 ata_altstatus(ap
); /* dummy read */
4372 * ata_host_intr - Handle host interrupt for given (port, task)
4373 * @ap: Port on which interrupt arrived (possibly...)
4374 * @qc: Taskfile currently active in engine
4376 * Handle host interrupt for given queued command. Currently,
4377 * only DMA interrupts are handled. All other commands are
4378 * handled via polling with interrupts disabled (nIEN bit).
4381 * spin_lock_irqsave(host_set lock)
4384 * One if interrupt was handled, zero if not (shared irq).
4387 inline unsigned int ata_host_intr (struct ata_port
*ap
,
4388 struct ata_queued_cmd
*qc
)
4390 u8 status
, host_stat
;
4392 switch (qc
->tf
.protocol
) {
4395 case ATA_PROT_ATAPI_DMA
:
4396 case ATA_PROT_ATAPI
:
4397 /* check status of DMA engine */
4398 host_stat
= ap
->ops
->bmdma_status(ap
);
4399 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
4401 /* if it's not our irq... */
4402 if (!(host_stat
& ATA_DMA_INTR
))
4405 /* before we do anything else, clear DMA-Start bit */
4406 ap
->ops
->bmdma_stop(qc
);
4410 case ATA_PROT_ATAPI_NODATA
:
4411 case ATA_PROT_NODATA
:
4412 /* check altstatus */
4413 status
= ata_altstatus(ap
);
4414 if (status
& ATA_BUSY
)
4417 /* check main status, clearing INTRQ */
4418 status
= ata_chk_status(ap
);
4419 if (unlikely(status
& ATA_BUSY
))
4421 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
4422 ap
->id
, qc
->tf
.protocol
, status
);
4424 /* ack bmdma irq events */
4425 ap
->ops
->irq_clear(ap
);
4427 /* complete taskfile transaction */
4428 qc
->err_mask
|= ac_err_mask(status
);
4429 ata_qc_complete(qc
);
4436 return 1; /* irq handled */
4439 ap
->stats
.idle_irq
++;
4442 if ((ap
->stats
.idle_irq
% 1000) == 0) {
4444 ata_irq_ack(ap
, 0); /* debug trap */
4445 printk(KERN_WARNING
"ata%d: irq trap\n", ap
->id
);
4448 return 0; /* irq not handled */
4452 * ata_interrupt - Default ATA host interrupt handler
4453 * @irq: irq line (unused)
4454 * @dev_instance: pointer to our ata_host_set information structure
4457 * Default interrupt handler for PCI IDE devices. Calls
4458 * ata_host_intr() for each port that is not disabled.
4461 * Obtains host_set lock during operation.
4464 * IRQ_NONE or IRQ_HANDLED.
4467 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
4469 struct ata_host_set
*host_set
= dev_instance
;
4471 unsigned int handled
= 0;
4472 unsigned long flags
;
4474 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4475 spin_lock_irqsave(&host_set
->lock
, flags
);
4477 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4478 struct ata_port
*ap
;
4480 ap
= host_set
->ports
[i
];
4482 !(ap
->flags
& (ATA_FLAG_PORT_DISABLED
| ATA_FLAG_NOINTR
))) {
4483 struct ata_queued_cmd
*qc
;
4485 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4486 if (qc
&& (!(qc
->tf
.ctl
& ATA_NIEN
)) &&
4487 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
4488 handled
|= ata_host_intr(ap
, qc
);
4492 spin_unlock_irqrestore(&host_set
->lock
, flags
);
4494 return IRQ_RETVAL(handled
);
4498 * atapi_packet_task - Write CDB bytes to hardware
4499 * @_data: Port to which ATAPI device is attached.
4501 * When device has indicated its readiness to accept
4502 * a CDB, this function is called. Send the CDB.
4503 * If DMA is to be performed, exit immediately.
4504 * Otherwise, we are in polling mode, so poll
4505 * status under operation succeeds or fails.
4508 * Kernel thread context (may sleep)
4511 static void atapi_packet_task(void *_data
)
4513 struct ata_port
*ap
= _data
;
4514 struct ata_queued_cmd
*qc
;
4517 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4519 assert(qc
->flags
& ATA_QCFLAG_ACTIVE
);
4521 /* sleep-wait for BSY to clear */
4522 DPRINTK("busy wait\n");
4523 if (ata_busy_sleep(ap
, ATA_TMOUT_CDB_QUICK
, ATA_TMOUT_CDB
)) {
4524 qc
->err_mask
|= AC_ERR_TIMEOUT
;
4528 /* make sure DRQ is set */
4529 status
= ata_chk_status(ap
);
4530 if ((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
) {
4531 qc
->err_mask
|= AC_ERR_HSM
;
4536 DPRINTK("send cdb\n");
4537 assert(ap
->cdb_len
>= 12);
4539 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
||
4540 qc
->tf
.protocol
== ATA_PROT_ATAPI_NODATA
) {
4541 unsigned long flags
;
4543 /* Once we're done issuing command and kicking bmdma,
4544 * irq handler takes over. To not lose irq, we need
4545 * to clear NOINTR flag before sending cdb, but
4546 * interrupt handler shouldn't be invoked before we're
4547 * finished. Hence, the following locking.
4549 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
4550 ap
->flags
&= ~ATA_FLAG_NOINTR
;
4551 ata_data_xfer(ap
, qc
->cdb
, ap
->cdb_len
, 1);
4552 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
)
4553 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4554 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
4556 ata_data_xfer(ap
, qc
->cdb
, ap
->cdb_len
, 1);
4558 /* PIO commands are handled by polling */
4559 ap
->hsm_task_state
= HSM_ST
;
4560 ata_queue_pio_task(ap
);
4566 ata_poll_qc_complete(qc
);
4571 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4572 * without filling any other registers
4574 static int ata_do_simple_cmd(struct ata_port
*ap
, struct ata_device
*dev
,
4577 struct ata_taskfile tf
;
4580 ata_tf_init(ap
, &tf
, dev
->devno
);
4583 tf
.flags
|= ATA_TFLAG_DEVICE
;
4584 tf
.protocol
= ATA_PROT_NODATA
;
4586 err
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
4588 printk(KERN_ERR
"%s: ata command failed: %d\n",
4594 static int ata_flush_cache(struct ata_port
*ap
, struct ata_device
*dev
)
4598 if (!ata_try_flush_cache(dev
))
4601 if (ata_id_has_flush_ext(dev
->id
))
4602 cmd
= ATA_CMD_FLUSH_EXT
;
4604 cmd
= ATA_CMD_FLUSH
;
4606 return ata_do_simple_cmd(ap
, dev
, cmd
);
4609 static int ata_standby_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4611 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_STANDBYNOW1
);
4614 static int ata_start_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4616 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_IDLEIMMEDIATE
);
4620 * ata_device_resume - wakeup a previously suspended devices
4621 * @ap: port the device is connected to
4622 * @dev: the device to resume
4624 * Kick the drive back into action, by sending it an idle immediate
4625 * command and making sure its transfer mode matches between drive
4629 int ata_device_resume(struct ata_port
*ap
, struct ata_device
*dev
)
4631 if (ap
->flags
& ATA_FLAG_SUSPENDED
) {
4632 ap
->flags
&= ~ATA_FLAG_SUSPENDED
;
4635 if (!ata_dev_present(dev
))
4637 if (dev
->class == ATA_DEV_ATA
)
4638 ata_start_drive(ap
, dev
);
4644 * ata_device_suspend - prepare a device for suspend
4645 * @ap: port the device is connected to
4646 * @dev: the device to suspend
4648 * Flush the cache on the drive, if appropriate, then issue a
4649 * standbynow command.
4651 int ata_device_suspend(struct ata_port
*ap
, struct ata_device
*dev
)
4653 if (!ata_dev_present(dev
))
4655 if (dev
->class == ATA_DEV_ATA
)
4656 ata_flush_cache(ap
, dev
);
4658 ata_standby_drive(ap
, dev
);
4659 ap
->flags
|= ATA_FLAG_SUSPENDED
;
4664 * ata_port_start - Set port up for dma.
4665 * @ap: Port to initialize
4667 * Called just after data structures for each port are
4668 * initialized. Allocates space for PRD table.
4670 * May be used as the port_start() entry in ata_port_operations.
4673 * Inherited from caller.
4676 int ata_port_start (struct ata_port
*ap
)
4678 struct device
*dev
= ap
->host_set
->dev
;
4681 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
4685 rc
= ata_pad_alloc(ap
, dev
);
4687 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4691 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
4698 * ata_port_stop - Undo ata_port_start()
4699 * @ap: Port to shut down
4701 * Frees the PRD table.
4703 * May be used as the port_stop() entry in ata_port_operations.
4706 * Inherited from caller.
4709 void ata_port_stop (struct ata_port
*ap
)
4711 struct device
*dev
= ap
->host_set
->dev
;
4713 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4714 ata_pad_free(ap
, dev
);
4717 void ata_host_stop (struct ata_host_set
*host_set
)
4719 if (host_set
->mmio_base
)
4720 iounmap(host_set
->mmio_base
);
4725 * ata_host_remove - Unregister SCSI host structure with upper layers
4726 * @ap: Port to unregister
4727 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4730 * Inherited from caller.
4733 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
4735 struct Scsi_Host
*sh
= ap
->host
;
4740 scsi_remove_host(sh
);
4742 ap
->ops
->port_stop(ap
);
4746 * ata_host_init - Initialize an ata_port structure
4747 * @ap: Structure to initialize
4748 * @host: associated SCSI mid-layer structure
4749 * @host_set: Collection of hosts to which @ap belongs
4750 * @ent: Probe information provided by low-level driver
4751 * @port_no: Port number associated with this ata_port
4753 * Initialize a new ata_port structure, and its associated
4757 * Inherited from caller.
4760 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
4761 struct ata_host_set
*host_set
,
4762 const struct ata_probe_ent
*ent
, unsigned int port_no
)
4768 host
->max_channel
= 1;
4769 host
->unique_id
= ata_unique_id
++;
4770 host
->max_cmd_len
= 12;
4772 ap
->flags
= ATA_FLAG_PORT_DISABLED
;
4773 ap
->id
= host
->unique_id
;
4775 ap
->ctl
= ATA_DEVCTL_OBS
;
4776 ap
->host_set
= host_set
;
4777 ap
->port_no
= port_no
;
4779 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
4780 ap
->pio_mask
= ent
->pio_mask
;
4781 ap
->mwdma_mask
= ent
->mwdma_mask
;
4782 ap
->udma_mask
= ent
->udma_mask
;
4783 ap
->flags
|= ent
->host_flags
;
4784 ap
->ops
= ent
->port_ops
;
4785 ap
->cbl
= ATA_CBL_NONE
;
4786 ap
->active_tag
= ATA_TAG_POISON
;
4787 ap
->last_ctl
= 0xFF;
4789 INIT_WORK(&ap
->packet_task
, atapi_packet_task
, ap
);
4790 INIT_WORK(&ap
->pio_task
, ata_pio_task
, ap
);
4791 INIT_LIST_HEAD(&ap
->eh_done_q
);
4793 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4794 ap
->device
[i
].devno
= i
;
4797 ap
->stats
.unhandled_irq
= 1;
4798 ap
->stats
.idle_irq
= 1;
4801 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
4805 * ata_host_add - Attach low-level ATA driver to system
4806 * @ent: Information provided by low-level driver
4807 * @host_set: Collections of ports to which we add
4808 * @port_no: Port number associated with this host
4810 * Attach low-level ATA driver to system.
4813 * PCI/etc. bus probe sem.
4816 * New ata_port on success, for NULL on error.
4819 static struct ata_port
* ata_host_add(const struct ata_probe_ent
*ent
,
4820 struct ata_host_set
*host_set
,
4821 unsigned int port_no
)
4823 struct Scsi_Host
*host
;
4824 struct ata_port
*ap
;
4828 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
4832 ap
= (struct ata_port
*) &host
->hostdata
[0];
4834 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
4836 rc
= ap
->ops
->port_start(ap
);
4843 scsi_host_put(host
);
4848 * ata_device_add - Register hardware device with ATA and SCSI layers
4849 * @ent: Probe information describing hardware device to be registered
4851 * This function processes the information provided in the probe
4852 * information struct @ent, allocates the necessary ATA and SCSI
4853 * host information structures, initializes them, and registers
4854 * everything with requisite kernel subsystems.
4856 * This function requests irqs, probes the ATA bus, and probes
4860 * PCI/etc. bus probe sem.
4863 * Number of ports registered. Zero on error (no ports registered).
4866 int ata_device_add(const struct ata_probe_ent
*ent
)
4868 unsigned int count
= 0, i
;
4869 struct device
*dev
= ent
->dev
;
4870 struct ata_host_set
*host_set
;
4873 /* alloc a container for our list of ATA ports (buses) */
4874 host_set
= kzalloc(sizeof(struct ata_host_set
) +
4875 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
4878 spin_lock_init(&host_set
->lock
);
4880 host_set
->dev
= dev
;
4881 host_set
->n_ports
= ent
->n_ports
;
4882 host_set
->irq
= ent
->irq
;
4883 host_set
->mmio_base
= ent
->mmio_base
;
4884 host_set
->private_data
= ent
->private_data
;
4885 host_set
->ops
= ent
->port_ops
;
4887 /* register each port bound to this device */
4888 for (i
= 0; i
< ent
->n_ports
; i
++) {
4889 struct ata_port
*ap
;
4890 unsigned long xfer_mode_mask
;
4892 ap
= ata_host_add(ent
, host_set
, i
);
4896 host_set
->ports
[i
] = ap
;
4897 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
4898 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
4899 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
4901 /* print per-port info to dmesg */
4902 printk(KERN_INFO
"ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4903 "bmdma 0x%lX irq %lu\n",
4905 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
4906 ata_mode_string(xfer_mode_mask
),
4907 ap
->ioaddr
.cmd_addr
,
4908 ap
->ioaddr
.ctl_addr
,
4909 ap
->ioaddr
.bmdma_addr
,
4913 host_set
->ops
->irq_clear(ap
);
4920 /* obtain irq, that is shared between channels */
4921 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
4922 DRV_NAME
, host_set
))
4925 /* perform each probe synchronously */
4926 DPRINTK("probe begin\n");
4927 for (i
= 0; i
< count
; i
++) {
4928 struct ata_port
*ap
;
4931 ap
= host_set
->ports
[i
];
4933 DPRINTK("ata%u: bus probe begin\n", ap
->id
);
4934 rc
= ata_bus_probe(ap
);
4935 DPRINTK("ata%u: bus probe end\n", ap
->id
);
4938 /* FIXME: do something useful here?
4939 * Current libata behavior will
4940 * tear down everything when
4941 * the module is removed
4942 * or the h/w is unplugged.
4946 rc
= scsi_add_host(ap
->host
, dev
);
4948 printk(KERN_ERR
"ata%u: scsi_add_host failed\n",
4950 /* FIXME: do something useful here */
4951 /* FIXME: handle unconditional calls to
4952 * scsi_scan_host and ata_host_remove, below,
4958 /* probes are done, now scan each port's disk(s) */
4959 DPRINTK("host probe begin\n");
4960 for (i
= 0; i
< count
; i
++) {
4961 struct ata_port
*ap
= host_set
->ports
[i
];
4963 ata_scsi_scan_host(ap
);
4966 dev_set_drvdata(dev
, host_set
);
4968 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
4969 return ent
->n_ports
; /* success */
4972 for (i
= 0; i
< count
; i
++) {
4973 ata_host_remove(host_set
->ports
[i
], 1);
4974 scsi_host_put(host_set
->ports
[i
]->host
);
4978 VPRINTK("EXIT, returning 0\n");
4983 * ata_host_set_remove - PCI layer callback for device removal
4984 * @host_set: ATA host set that was removed
4986 * Unregister all objects associated with this host set. Free those
4990 * Inherited from calling layer (may sleep).
4993 void ata_host_set_remove(struct ata_host_set
*host_set
)
4995 struct ata_port
*ap
;
4998 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4999 ap
= host_set
->ports
[i
];
5000 scsi_remove_host(ap
->host
);
5003 free_irq(host_set
->irq
, host_set
);
5005 for (i
= 0; i
< host_set
->n_ports
; i
++) {
5006 ap
= host_set
->ports
[i
];
5008 ata_scsi_release(ap
->host
);
5010 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
5011 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
5013 if (ioaddr
->cmd_addr
== 0x1f0)
5014 release_region(0x1f0, 8);
5015 else if (ioaddr
->cmd_addr
== 0x170)
5016 release_region(0x170, 8);
5019 scsi_host_put(ap
->host
);
5022 if (host_set
->ops
->host_stop
)
5023 host_set
->ops
->host_stop(host_set
);
5029 * ata_scsi_release - SCSI layer callback hook for host unload
5030 * @host: libata host to be unloaded
5032 * Performs all duties necessary to shut down a libata port...
5033 * Kill port kthread, disable port, and release resources.
5036 * Inherited from SCSI layer.
5042 int ata_scsi_release(struct Scsi_Host
*host
)
5044 struct ata_port
*ap
= (struct ata_port
*) &host
->hostdata
[0];
5048 ap
->ops
->port_disable(ap
);
5049 ata_host_remove(ap
, 0);
5056 * ata_std_ports - initialize ioaddr with standard port offsets.
5057 * @ioaddr: IO address structure to be initialized
5059 * Utility function which initializes data_addr, error_addr,
5060 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
5061 * device_addr, status_addr, and command_addr to standard offsets
5062 * relative to cmd_addr.
5064 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
5067 void ata_std_ports(struct ata_ioports
*ioaddr
)
5069 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
5070 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
5071 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
5072 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
5073 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
5074 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
5075 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
5076 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
5077 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
5078 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
5081 static struct ata_probe_ent
*
5082 ata_probe_ent_alloc(struct device
*dev
, const struct ata_port_info
*port
)
5084 struct ata_probe_ent
*probe_ent
;
5086 probe_ent
= kzalloc(sizeof(*probe_ent
), GFP_KERNEL
);
5088 printk(KERN_ERR DRV_NAME
"(%s): out of memory\n",
5089 kobject_name(&(dev
->kobj
)));
5093 INIT_LIST_HEAD(&probe_ent
->node
);
5094 probe_ent
->dev
= dev
;
5096 probe_ent
->sht
= port
->sht
;
5097 probe_ent
->host_flags
= port
->host_flags
;
5098 probe_ent
->pio_mask
= port
->pio_mask
;
5099 probe_ent
->mwdma_mask
= port
->mwdma_mask
;
5100 probe_ent
->udma_mask
= port
->udma_mask
;
5101 probe_ent
->port_ops
= port
->port_ops
;
5110 void ata_pci_host_stop (struct ata_host_set
*host_set
)
5112 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
5114 pci_iounmap(pdev
, host_set
->mmio_base
);
5118 * ata_pci_init_native_mode - Initialize native-mode driver
5119 * @pdev: pci device to be initialized
5120 * @port: array[2] of pointers to port info structures.
5121 * @ports: bitmap of ports present
5123 * Utility function which allocates and initializes an
5124 * ata_probe_ent structure for a standard dual-port
5125 * PIO-based IDE controller. The returned ata_probe_ent
5126 * structure can be passed to ata_device_add(). The returned
5127 * ata_probe_ent structure should then be freed with kfree().
5129 * The caller need only pass the address of the primary port, the
5130 * secondary will be deduced automatically. If the device has non
5131 * standard secondary port mappings this function can be called twice,
5132 * once for each interface.
5135 struct ata_probe_ent
*
5136 ata_pci_init_native_mode(struct pci_dev
*pdev
, struct ata_port_info
**port
, int ports
)
5138 struct ata_probe_ent
*probe_ent
=
5139 ata_probe_ent_alloc(pci_dev_to_dev(pdev
), port
[0]);
5145 probe_ent
->irq
= pdev
->irq
;
5146 probe_ent
->irq_flags
= SA_SHIRQ
;
5147 probe_ent
->private_data
= port
[0]->private_data
;
5149 if (ports
& ATA_PORT_PRIMARY
) {
5150 probe_ent
->port
[p
].cmd_addr
= pci_resource_start(pdev
, 0);
5151 probe_ent
->port
[p
].altstatus_addr
=
5152 probe_ent
->port
[p
].ctl_addr
=
5153 pci_resource_start(pdev
, 1) | ATA_PCI_CTL_OFS
;
5154 probe_ent
->port
[p
].bmdma_addr
= pci_resource_start(pdev
, 4);
5155 ata_std_ports(&probe_ent
->port
[p
]);
5159 if (ports
& ATA_PORT_SECONDARY
) {
5160 probe_ent
->port
[p
].cmd_addr
= pci_resource_start(pdev
, 2);
5161 probe_ent
->port
[p
].altstatus_addr
=
5162 probe_ent
->port
[p
].ctl_addr
=
5163 pci_resource_start(pdev
, 3) | ATA_PCI_CTL_OFS
;
5164 probe_ent
->port
[p
].bmdma_addr
= pci_resource_start(pdev
, 4) + 8;
5165 ata_std_ports(&probe_ent
->port
[p
]);
5169 probe_ent
->n_ports
= p
;
5173 static struct ata_probe_ent
*ata_pci_init_legacy_port(struct pci_dev
*pdev
, struct ata_port_info
*port
, int port_num
)
5175 struct ata_probe_ent
*probe_ent
;
5177 probe_ent
= ata_probe_ent_alloc(pci_dev_to_dev(pdev
), port
);
5181 probe_ent
->legacy_mode
= 1;
5182 probe_ent
->n_ports
= 1;
5183 probe_ent
->hard_port_no
= port_num
;
5184 probe_ent
->private_data
= port
->private_data
;
5189 probe_ent
->irq
= 14;
5190 probe_ent
->port
[0].cmd_addr
= 0x1f0;
5191 probe_ent
->port
[0].altstatus_addr
=
5192 probe_ent
->port
[0].ctl_addr
= 0x3f6;
5195 probe_ent
->irq
= 15;
5196 probe_ent
->port
[0].cmd_addr
= 0x170;
5197 probe_ent
->port
[0].altstatus_addr
=
5198 probe_ent
->port
[0].ctl_addr
= 0x376;
5201 probe_ent
->port
[0].bmdma_addr
= pci_resource_start(pdev
, 4) + 8 * port_num
;
5202 ata_std_ports(&probe_ent
->port
[0]);
5207 * ata_pci_init_one - Initialize/register PCI IDE host controller
5208 * @pdev: Controller to be initialized
5209 * @port_info: Information from low-level host driver
5210 * @n_ports: Number of ports attached to host controller
5212 * This is a helper function which can be called from a driver's
5213 * xxx_init_one() probe function if the hardware uses traditional
5214 * IDE taskfile registers.
5216 * This function calls pci_enable_device(), reserves its register
5217 * regions, sets the dma mask, enables bus master mode, and calls
5221 * Inherited from PCI layer (may sleep).
5224 * Zero on success, negative on errno-based value on error.
5227 int ata_pci_init_one (struct pci_dev
*pdev
, struct ata_port_info
**port_info
,
5228 unsigned int n_ports
)
5230 struct ata_probe_ent
*probe_ent
= NULL
, *probe_ent2
= NULL
;
5231 struct ata_port_info
*port
[2];
5233 unsigned int legacy_mode
= 0;
5234 int disable_dev_on_err
= 1;
5239 port
[0] = port_info
[0];
5241 port
[1] = port_info
[1];
5245 if ((port
[0]->host_flags
& ATA_FLAG_NO_LEGACY
) == 0
5246 && (pdev
->class >> 8) == PCI_CLASS_STORAGE_IDE
) {
5247 /* TODO: What if one channel is in native mode ... */
5248 pci_read_config_byte(pdev
, PCI_CLASS_PROG
, &tmp8
);
5249 mask
= (1 << 2) | (1 << 0);
5250 if ((tmp8
& mask
) != mask
)
5251 legacy_mode
= (1 << 3);
5255 if ((!legacy_mode
) && (n_ports
> 2)) {
5256 printk(KERN_ERR
"ata: BUG: native mode, n_ports > 2\n");
5261 /* FIXME: Really for ATA it isn't safe because the device may be
5262 multi-purpose and we want to leave it alone if it was already
5263 enabled. Secondly for shared use as Arjan says we want refcounting
5265 Checking dev->is_enabled is insufficient as this is not set at
5266 boot for the primary video which is BIOS enabled
5269 rc
= pci_enable_device(pdev
);
5273 rc
= pci_request_regions(pdev
, DRV_NAME
);
5275 disable_dev_on_err
= 0;
5279 /* FIXME: Should use platform specific mappers for legacy port ranges */
5281 if (!request_region(0x1f0, 8, "libata")) {
5282 struct resource
*conflict
, res
;
5284 res
.end
= 0x1f0 + 8 - 1;
5285 conflict
= ____request_resource(&ioport_resource
, &res
);
5286 if (!strcmp(conflict
->name
, "libata"))
5287 legacy_mode
|= (1 << 0);
5289 disable_dev_on_err
= 0;
5290 printk(KERN_WARNING
"ata: 0x1f0 IDE port busy\n");
5293 legacy_mode
|= (1 << 0);
5295 if (!request_region(0x170, 8, "libata")) {
5296 struct resource
*conflict
, res
;
5298 res
.end
= 0x170 + 8 - 1;
5299 conflict
= ____request_resource(&ioport_resource
, &res
);
5300 if (!strcmp(conflict
->name
, "libata"))
5301 legacy_mode
|= (1 << 1);
5303 disable_dev_on_err
= 0;
5304 printk(KERN_WARNING
"ata: 0x170 IDE port busy\n");
5307 legacy_mode
|= (1 << 1);
5310 /* we have legacy mode, but all ports are unavailable */
5311 if (legacy_mode
== (1 << 3)) {
5313 goto err_out_regions
;
5316 rc
= pci_set_dma_mask(pdev
, ATA_DMA_MASK
);
5318 goto err_out_regions
;
5319 rc
= pci_set_consistent_dma_mask(pdev
, ATA_DMA_MASK
);
5321 goto err_out_regions
;
5324 if (legacy_mode
& (1 << 0))
5325 probe_ent
= ata_pci_init_legacy_port(pdev
, port
[0], 0);
5326 if (legacy_mode
& (1 << 1))
5327 probe_ent2
= ata_pci_init_legacy_port(pdev
, port
[1], 1);
5330 probe_ent
= ata_pci_init_native_mode(pdev
, port
, ATA_PORT_PRIMARY
| ATA_PORT_SECONDARY
);
5332 probe_ent
= ata_pci_init_native_mode(pdev
, port
, ATA_PORT_PRIMARY
);
5334 if (!probe_ent
&& !probe_ent2
) {
5336 goto err_out_regions
;
5339 pci_set_master(pdev
);
5341 /* FIXME: check ata_device_add return */
5343 if (legacy_mode
& (1 << 0))
5344 ata_device_add(probe_ent
);
5345 if (legacy_mode
& (1 << 1))
5346 ata_device_add(probe_ent2
);
5348 ata_device_add(probe_ent
);
5356 if (legacy_mode
& (1 << 0))
5357 release_region(0x1f0, 8);
5358 if (legacy_mode
& (1 << 1))
5359 release_region(0x170, 8);
5360 pci_release_regions(pdev
);
5362 if (disable_dev_on_err
)
5363 pci_disable_device(pdev
);
5368 * ata_pci_remove_one - PCI layer callback for device removal
5369 * @pdev: PCI device that was removed
5371 * PCI layer indicates to libata via this hook that
5372 * hot-unplug or module unload event has occurred.
5373 * Handle this by unregistering all objects associated
5374 * with this PCI device. Free those objects. Then finally
5375 * release PCI resources and disable device.
5378 * Inherited from PCI layer (may sleep).
5381 void ata_pci_remove_one (struct pci_dev
*pdev
)
5383 struct device
*dev
= pci_dev_to_dev(pdev
);
5384 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
5386 ata_host_set_remove(host_set
);
5387 pci_release_regions(pdev
);
5388 pci_disable_device(pdev
);
5389 dev_set_drvdata(dev
, NULL
);
5392 /* move to PCI subsystem */
5393 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
5395 unsigned long tmp
= 0;
5397 switch (bits
->width
) {
5400 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
5406 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
5412 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
5423 return (tmp
== bits
->val
) ? 1 : 0;
5426 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
)
5428 pci_save_state(pdev
);
5429 pci_disable_device(pdev
);
5430 pci_set_power_state(pdev
, PCI_D3hot
);
5434 int ata_pci_device_resume(struct pci_dev
*pdev
)
5436 pci_set_power_state(pdev
, PCI_D0
);
5437 pci_restore_state(pdev
);
5438 pci_enable_device(pdev
);
5439 pci_set_master(pdev
);
5442 #endif /* CONFIG_PCI */
5445 static int __init
ata_init(void)
5447 ata_wq
= create_workqueue("ata");
5451 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
5455 static void __exit
ata_exit(void)
5457 destroy_workqueue(ata_wq
);
5460 module_init(ata_init
);
5461 module_exit(ata_exit
);
5463 static unsigned long ratelimit_time
;
5464 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
5466 int ata_ratelimit(void)
5469 unsigned long flags
;
5471 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
5473 if (time_after(jiffies
, ratelimit_time
)) {
5475 ratelimit_time
= jiffies
+ (HZ
/5);
5479 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
5485 * libata is essentially a library of internal helper functions for
5486 * low-level ATA host controller drivers. As such, the API/ABI is
5487 * likely to change as new drivers are added and updated.
5488 * Do not depend on ABI/API stability.
5491 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
5492 EXPORT_SYMBOL_GPL(ata_std_ports
);
5493 EXPORT_SYMBOL_GPL(ata_device_add
);
5494 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
5495 EXPORT_SYMBOL_GPL(ata_sg_init
);
5496 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
5497 EXPORT_SYMBOL_GPL(ata_qc_complete
);
5498 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
5499 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
5500 EXPORT_SYMBOL_GPL(ata_tf_load
);
5501 EXPORT_SYMBOL_GPL(ata_tf_read
);
5502 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
5503 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
5504 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
5505 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
5506 EXPORT_SYMBOL_GPL(ata_check_status
);
5507 EXPORT_SYMBOL_GPL(ata_altstatus
);
5508 EXPORT_SYMBOL_GPL(ata_exec_command
);
5509 EXPORT_SYMBOL_GPL(ata_port_start
);
5510 EXPORT_SYMBOL_GPL(ata_port_stop
);
5511 EXPORT_SYMBOL_GPL(ata_host_stop
);
5512 EXPORT_SYMBOL_GPL(ata_interrupt
);
5513 EXPORT_SYMBOL_GPL(ata_qc_prep
);
5514 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
5515 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
5516 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
5517 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
5518 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
5519 EXPORT_SYMBOL_GPL(ata_port_probe
);
5520 EXPORT_SYMBOL_GPL(sata_phy_reset
);
5521 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
5522 EXPORT_SYMBOL_GPL(ata_bus_reset
);
5523 EXPORT_SYMBOL_GPL(ata_std_softreset
);
5524 EXPORT_SYMBOL_GPL(sata_std_hardreset
);
5525 EXPORT_SYMBOL_GPL(ata_std_postreset
);
5526 EXPORT_SYMBOL_GPL(ata_std_probe_reset
);
5527 EXPORT_SYMBOL_GPL(ata_drive_probe_reset
);
5528 EXPORT_SYMBOL_GPL(ata_port_disable
);
5529 EXPORT_SYMBOL_GPL(ata_ratelimit
);
5530 EXPORT_SYMBOL_GPL(ata_busy_sleep
);
5531 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
5532 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
5533 EXPORT_SYMBOL_GPL(ata_scsi_error
);
5534 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
5535 EXPORT_SYMBOL_GPL(ata_scsi_release
);
5536 EXPORT_SYMBOL_GPL(ata_host_intr
);
5537 EXPORT_SYMBOL_GPL(ata_dev_classify
);
5538 EXPORT_SYMBOL_GPL(ata_dev_id_string
);
5539 EXPORT_SYMBOL_GPL(ata_dev_config
);
5540 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
5541 EXPORT_SYMBOL_GPL(ata_eh_qc_complete
);
5542 EXPORT_SYMBOL_GPL(ata_eh_qc_retry
);
5544 EXPORT_SYMBOL_GPL(ata_pio_need_iordy
);
5545 EXPORT_SYMBOL_GPL(ata_timing_compute
);
5546 EXPORT_SYMBOL_GPL(ata_timing_merge
);
5549 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
5550 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
5551 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
5552 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
5553 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
5554 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
5555 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
5556 #endif /* CONFIG_PCI */
5558 EXPORT_SYMBOL_GPL(ata_device_suspend
);
5559 EXPORT_SYMBOL_GPL(ata_device_resume
);
5560 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
5561 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);