2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/config.h>
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/init.h>
40 #include <linux/list.h>
42 #include <linux/highmem.h>
43 #include <linux/spinlock.h>
44 #include <linux/blkdev.h>
45 #include <linux/delay.h>
46 #include <linux/timer.h>
47 #include <linux/interrupt.h>
48 #include <linux/completion.h>
49 #include <linux/suspend.h>
50 #include <linux/workqueue.h>
51 #include <linux/jiffies.h>
52 #include <scsi/scsi.h>
54 #include "scsi_priv.h"
55 #include <scsi/scsi_host.h>
56 #include <linux/libata.h>
58 #include <asm/semaphore.h>
59 #include <asm/byteorder.h>
63 static unsigned int ata_busy_sleep (struct ata_port
*ap
,
64 unsigned long tmout_pat
,
66 static void ata_dev_init_params(struct ata_port
*ap
, struct ata_device
*dev
);
67 static void ata_set_mode(struct ata_port
*ap
);
68 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
);
69 static unsigned int ata_get_mode_mask(struct ata_port
*ap
, int shift
);
70 static int fgb(u32 bitmap
);
71 static int ata_choose_xfer_mode(struct ata_port
*ap
,
73 unsigned int *xfer_shift_out
);
74 static void __ata_qc_complete(struct ata_queued_cmd
*qc
);
76 static unsigned int ata_unique_id
= 1;
77 static struct workqueue_struct
*ata_wq
;
79 int atapi_enabled
= 0;
80 module_param(atapi_enabled
, int, 0444);
81 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
83 MODULE_AUTHOR("Jeff Garzik");
84 MODULE_DESCRIPTION("Library module for ATA devices");
85 MODULE_LICENSE("GPL");
86 MODULE_VERSION(DRV_VERSION
);
89 * ata_tf_load - send taskfile registers to host controller
90 * @ap: Port to which output is sent
91 * @tf: ATA taskfile register set
93 * Outputs ATA taskfile to standard ATA host controller.
96 * Inherited from caller.
99 static void ata_tf_load_pio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
101 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
102 unsigned int is_addr
= tf
->flags
& ATA_TFLAG_ISADDR
;
104 if (tf
->ctl
!= ap
->last_ctl
) {
105 outb(tf
->ctl
, ioaddr
->ctl_addr
);
106 ap
->last_ctl
= tf
->ctl
;
110 if (is_addr
&& (tf
->flags
& ATA_TFLAG_LBA48
)) {
111 outb(tf
->hob_feature
, ioaddr
->feature_addr
);
112 outb(tf
->hob_nsect
, ioaddr
->nsect_addr
);
113 outb(tf
->hob_lbal
, ioaddr
->lbal_addr
);
114 outb(tf
->hob_lbam
, ioaddr
->lbam_addr
);
115 outb(tf
->hob_lbah
, ioaddr
->lbah_addr
);
116 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
125 outb(tf
->feature
, ioaddr
->feature_addr
);
126 outb(tf
->nsect
, ioaddr
->nsect_addr
);
127 outb(tf
->lbal
, ioaddr
->lbal_addr
);
128 outb(tf
->lbam
, ioaddr
->lbam_addr
);
129 outb(tf
->lbah
, ioaddr
->lbah_addr
);
130 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
138 if (tf
->flags
& ATA_TFLAG_DEVICE
) {
139 outb(tf
->device
, ioaddr
->device_addr
);
140 VPRINTK("device 0x%X\n", tf
->device
);
147 * ata_tf_load_mmio - send taskfile registers to host controller
148 * @ap: Port to which output is sent
149 * @tf: ATA taskfile register set
151 * Outputs ATA taskfile to standard ATA host controller using MMIO.
154 * Inherited from caller.
157 static void ata_tf_load_mmio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
159 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
160 unsigned int is_addr
= tf
->flags
& ATA_TFLAG_ISADDR
;
162 if (tf
->ctl
!= ap
->last_ctl
) {
163 writeb(tf
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
164 ap
->last_ctl
= tf
->ctl
;
168 if (is_addr
&& (tf
->flags
& ATA_TFLAG_LBA48
)) {
169 writeb(tf
->hob_feature
, (void __iomem
*) ioaddr
->feature_addr
);
170 writeb(tf
->hob_nsect
, (void __iomem
*) ioaddr
->nsect_addr
);
171 writeb(tf
->hob_lbal
, (void __iomem
*) ioaddr
->lbal_addr
);
172 writeb(tf
->hob_lbam
, (void __iomem
*) ioaddr
->lbam_addr
);
173 writeb(tf
->hob_lbah
, (void __iomem
*) ioaddr
->lbah_addr
);
174 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
183 writeb(tf
->feature
, (void __iomem
*) ioaddr
->feature_addr
);
184 writeb(tf
->nsect
, (void __iomem
*) ioaddr
->nsect_addr
);
185 writeb(tf
->lbal
, (void __iomem
*) ioaddr
->lbal_addr
);
186 writeb(tf
->lbam
, (void __iomem
*) ioaddr
->lbam_addr
);
187 writeb(tf
->lbah
, (void __iomem
*) ioaddr
->lbah_addr
);
188 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
196 if (tf
->flags
& ATA_TFLAG_DEVICE
) {
197 writeb(tf
->device
, (void __iomem
*) ioaddr
->device_addr
);
198 VPRINTK("device 0x%X\n", tf
->device
);
206 * ata_tf_load - send taskfile registers to host controller
207 * @ap: Port to which output is sent
208 * @tf: ATA taskfile register set
210 * Outputs ATA taskfile to standard ATA host controller using MMIO
211 * or PIO as indicated by the ATA_FLAG_MMIO flag.
212 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
213 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
214 * hob_lbal, hob_lbam, and hob_lbah.
216 * This function waits for idle (!BUSY and !DRQ) after writing
217 * registers. If the control register has a new value, this
218 * function also waits for idle after writing control and before
219 * writing the remaining registers.
221 * May be used as the tf_load() entry in ata_port_operations.
224 * Inherited from caller.
226 void ata_tf_load(struct ata_port
*ap
, struct ata_taskfile
*tf
)
228 if (ap
->flags
& ATA_FLAG_MMIO
)
229 ata_tf_load_mmio(ap
, tf
);
231 ata_tf_load_pio(ap
, tf
);
235 * ata_exec_command_pio - issue ATA command to host controller
236 * @ap: port to which command is being issued
237 * @tf: ATA taskfile register set
239 * Issues PIO write to ATA command register, with proper
240 * synchronization with interrupt handler / other threads.
243 * spin_lock_irqsave(host_set lock)
246 static void ata_exec_command_pio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
248 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
250 outb(tf
->command
, ap
->ioaddr
.command_addr
);
256 * ata_exec_command_mmio - issue ATA command to host controller
257 * @ap: port to which command is being issued
258 * @tf: ATA taskfile register set
260 * Issues MMIO write to ATA command register, with proper
261 * synchronization with interrupt handler / other threads.
264 * spin_lock_irqsave(host_set lock)
267 static void ata_exec_command_mmio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
269 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
271 writeb(tf
->command
, (void __iomem
*) ap
->ioaddr
.command_addr
);
277 * ata_exec_command - issue ATA command to host controller
278 * @ap: port to which command is being issued
279 * @tf: ATA taskfile register set
281 * Issues PIO/MMIO write to ATA command register, with proper
282 * synchronization with interrupt handler / other threads.
285 * spin_lock_irqsave(host_set lock)
287 void ata_exec_command(struct ata_port
*ap
, struct ata_taskfile
*tf
)
289 if (ap
->flags
& ATA_FLAG_MMIO
)
290 ata_exec_command_mmio(ap
, tf
);
292 ata_exec_command_pio(ap
, tf
);
296 * ata_exec - issue ATA command to host controller
297 * @ap: port to which command is being issued
298 * @tf: ATA taskfile register set
300 * Issues PIO/MMIO write to ATA command register, with proper
301 * synchronization with interrupt handler / other threads.
304 * Obtains host_set lock.
307 static inline void ata_exec(struct ata_port
*ap
, struct ata_taskfile
*tf
)
311 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
312 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
313 ap
->ops
->exec_command(ap
, tf
);
314 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
318 * ata_tf_to_host - issue ATA taskfile to host controller
319 * @ap: port to which command is being issued
320 * @tf: ATA taskfile register set
322 * Issues ATA taskfile register set to ATA host controller,
323 * with proper synchronization with interrupt handler and
327 * Obtains host_set lock.
330 static void ata_tf_to_host(struct ata_port
*ap
, struct ata_taskfile
*tf
)
332 ap
->ops
->tf_load(ap
, tf
);
338 * ata_tf_to_host_nolock - issue ATA taskfile to host controller
339 * @ap: port to which command is being issued
340 * @tf: ATA taskfile register set
342 * Issues ATA taskfile register set to ATA host controller,
343 * with proper synchronization with interrupt handler and
347 * spin_lock_irqsave(host_set lock)
350 void ata_tf_to_host_nolock(struct ata_port
*ap
, struct ata_taskfile
*tf
)
352 ap
->ops
->tf_load(ap
, tf
);
353 ap
->ops
->exec_command(ap
, tf
);
357 * ata_tf_read_pio - input device's ATA taskfile shadow registers
358 * @ap: Port from which input is read
359 * @tf: ATA taskfile register set for storing input
361 * Reads ATA taskfile registers for currently-selected device
365 * Inherited from caller.
368 static void ata_tf_read_pio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
370 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
372 tf
->nsect
= inb(ioaddr
->nsect_addr
);
373 tf
->lbal
= inb(ioaddr
->lbal_addr
);
374 tf
->lbam
= inb(ioaddr
->lbam_addr
);
375 tf
->lbah
= inb(ioaddr
->lbah_addr
);
376 tf
->device
= inb(ioaddr
->device_addr
);
378 if (tf
->flags
& ATA_TFLAG_LBA48
) {
379 outb(tf
->ctl
| ATA_HOB
, ioaddr
->ctl_addr
);
380 tf
->hob_feature
= inb(ioaddr
->error_addr
);
381 tf
->hob_nsect
= inb(ioaddr
->nsect_addr
);
382 tf
->hob_lbal
= inb(ioaddr
->lbal_addr
);
383 tf
->hob_lbam
= inb(ioaddr
->lbam_addr
);
384 tf
->hob_lbah
= inb(ioaddr
->lbah_addr
);
389 * ata_tf_read_mmio - input device's ATA taskfile shadow registers
390 * @ap: Port from which input is read
391 * @tf: ATA taskfile register set for storing input
393 * Reads ATA taskfile registers for currently-selected device
397 * Inherited from caller.
400 static void ata_tf_read_mmio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
402 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
404 tf
->nsect
= readb((void __iomem
*)ioaddr
->nsect_addr
);
405 tf
->lbal
= readb((void __iomem
*)ioaddr
->lbal_addr
);
406 tf
->lbam
= readb((void __iomem
*)ioaddr
->lbam_addr
);
407 tf
->lbah
= readb((void __iomem
*)ioaddr
->lbah_addr
);
408 tf
->device
= readb((void __iomem
*)ioaddr
->device_addr
);
410 if (tf
->flags
& ATA_TFLAG_LBA48
) {
411 writeb(tf
->ctl
| ATA_HOB
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
412 tf
->hob_feature
= readb((void __iomem
*)ioaddr
->error_addr
);
413 tf
->hob_nsect
= readb((void __iomem
*)ioaddr
->nsect_addr
);
414 tf
->hob_lbal
= readb((void __iomem
*)ioaddr
->lbal_addr
);
415 tf
->hob_lbam
= readb((void __iomem
*)ioaddr
->lbam_addr
);
416 tf
->hob_lbah
= readb((void __iomem
*)ioaddr
->lbah_addr
);
422 * ata_tf_read - input device's ATA taskfile shadow registers
423 * @ap: Port from which input is read
424 * @tf: ATA taskfile register set for storing input
426 * Reads ATA taskfile registers for currently-selected device
429 * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48
430 * is set, also reads the hob registers.
432 * May be used as the tf_read() entry in ata_port_operations.
435 * Inherited from caller.
437 void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
)
439 if (ap
->flags
& ATA_FLAG_MMIO
)
440 ata_tf_read_mmio(ap
, tf
);
442 ata_tf_read_pio(ap
, tf
);
446 * ata_check_status_pio - Read device status reg & clear interrupt
447 * @ap: port where the device is
449 * Reads ATA taskfile status register for currently-selected device
450 * and return its value. This also clears pending interrupts
454 * Inherited from caller.
456 static u8
ata_check_status_pio(struct ata_port
*ap
)
458 return inb(ap
->ioaddr
.status_addr
);
462 * ata_check_status_mmio - Read device status reg & clear interrupt
463 * @ap: port where the device is
465 * Reads ATA taskfile status register for currently-selected device
466 * via MMIO and return its value. This also clears pending interrupts
470 * Inherited from caller.
472 static u8
ata_check_status_mmio(struct ata_port
*ap
)
474 return readb((void __iomem
*) ap
->ioaddr
.status_addr
);
479 * ata_check_status - Read device status reg & clear interrupt
480 * @ap: port where the device is
482 * Reads ATA taskfile status register for currently-selected device
483 * and return its value. This also clears pending interrupts
486 * May be used as the check_status() entry in ata_port_operations.
489 * Inherited from caller.
491 u8
ata_check_status(struct ata_port
*ap
)
493 if (ap
->flags
& ATA_FLAG_MMIO
)
494 return ata_check_status_mmio(ap
);
495 return ata_check_status_pio(ap
);
500 * ata_altstatus - Read device alternate status reg
501 * @ap: port where the device is
503 * Reads ATA taskfile alternate status register for
504 * currently-selected device and return its value.
506 * Note: may NOT be used as the check_altstatus() entry in
507 * ata_port_operations.
510 * Inherited from caller.
512 u8
ata_altstatus(struct ata_port
*ap
)
514 if (ap
->ops
->check_altstatus
)
515 return ap
->ops
->check_altstatus(ap
);
517 if (ap
->flags
& ATA_FLAG_MMIO
)
518 return readb((void __iomem
*)ap
->ioaddr
.altstatus_addr
);
519 return inb(ap
->ioaddr
.altstatus_addr
);
524 * ata_chk_err - Read device error reg
525 * @ap: port where the device is
527 * Reads ATA taskfile error register for
528 * currently-selected device and return its value.
530 * Note: may NOT be used as the check_err() entry in
531 * ata_port_operations.
534 * Inherited from caller.
536 u8
ata_chk_err(struct ata_port
*ap
)
538 if (ap
->ops
->check_err
)
539 return ap
->ops
->check_err(ap
);
541 if (ap
->flags
& ATA_FLAG_MMIO
) {
542 return readb((void __iomem
*) ap
->ioaddr
.error_addr
);
544 return inb(ap
->ioaddr
.error_addr
);
548 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
549 * @tf: Taskfile to convert
550 * @fis: Buffer into which data will output
551 * @pmp: Port multiplier port
553 * Converts a standard ATA taskfile to a Serial ATA
554 * FIS structure (Register - Host to Device).
557 * Inherited from caller.
560 void ata_tf_to_fis(struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
562 fis
[0] = 0x27; /* Register - Host to Device FIS */
563 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
564 bit 7 indicates Command FIS */
565 fis
[2] = tf
->command
;
566 fis
[3] = tf
->feature
;
573 fis
[8] = tf
->hob_lbal
;
574 fis
[9] = tf
->hob_lbam
;
575 fis
[10] = tf
->hob_lbah
;
576 fis
[11] = tf
->hob_feature
;
579 fis
[13] = tf
->hob_nsect
;
590 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
591 * @fis: Buffer from which data will be input
592 * @tf: Taskfile to output
594 * Converts a standard ATA taskfile to a Serial ATA
595 * FIS structure (Register - Host to Device).
598 * Inherited from caller.
601 void ata_tf_from_fis(u8
*fis
, struct ata_taskfile
*tf
)
603 tf
->command
= fis
[2]; /* status */
604 tf
->feature
= fis
[3]; /* error */
611 tf
->hob_lbal
= fis
[8];
612 tf
->hob_lbam
= fis
[9];
613 tf
->hob_lbah
= fis
[10];
616 tf
->hob_nsect
= fis
[13];
620 * ata_prot_to_cmd - determine which read/write opcodes to use
621 * @protocol: ATA_PROT_xxx taskfile protocol
622 * @lba48: true is lba48 is present
624 * Given necessary input, determine which read/write commands
625 * to use to transfer data.
630 static int ata_prot_to_cmd(int protocol
, int lba48
)
632 int rcmd
= 0, wcmd
= 0;
637 rcmd
= ATA_CMD_PIO_READ_EXT
;
638 wcmd
= ATA_CMD_PIO_WRITE_EXT
;
640 rcmd
= ATA_CMD_PIO_READ
;
641 wcmd
= ATA_CMD_PIO_WRITE
;
647 rcmd
= ATA_CMD_READ_EXT
;
648 wcmd
= ATA_CMD_WRITE_EXT
;
651 wcmd
= ATA_CMD_WRITE
;
659 return rcmd
| (wcmd
<< 8);
663 * ata_dev_set_protocol - set taskfile protocol and r/w commands
664 * @dev: device to examine and configure
666 * Examine the device configuration, after we have
667 * read the identify-device page and configured the
668 * data transfer mode. Set internal state related to
669 * the ATA taskfile protocol (pio, pio mult, dma, etc.)
670 * and calculate the proper read/write commands to use.
675 static void ata_dev_set_protocol(struct ata_device
*dev
)
677 int pio
= (dev
->flags
& ATA_DFLAG_PIO
);
678 int lba48
= (dev
->flags
& ATA_DFLAG_LBA48
);
682 proto
= dev
->xfer_protocol
= ATA_PROT_PIO
;
684 proto
= dev
->xfer_protocol
= ATA_PROT_DMA
;
686 cmd
= ata_prot_to_cmd(proto
, lba48
);
690 dev
->read_cmd
= cmd
& 0xff;
691 dev
->write_cmd
= (cmd
>> 8) & 0xff;
694 static const char * xfer_mode_str
[] = {
714 * ata_udma_string - convert UDMA bit offset to string
715 * @mask: mask of bits supported; only highest bit counts.
717 * Determine string which represents the highest speed
718 * (highest bit in @udma_mask).
724 * Constant C string representing highest speed listed in
725 * @udma_mask, or the constant C string "<n/a>".
728 static const char *ata_mode_string(unsigned int mask
)
732 for (i
= 7; i
>= 0; i
--)
735 for (i
= ATA_SHIFT_MWDMA
+ 2; i
>= ATA_SHIFT_MWDMA
; i
--)
738 for (i
= ATA_SHIFT_PIO
+ 4; i
>= ATA_SHIFT_PIO
; i
--)
745 return xfer_mode_str
[i
];
749 * ata_pio_devchk - PATA device presence detection
750 * @ap: ATA channel to examine
751 * @device: Device to examine (starting at zero)
753 * This technique was originally described in
754 * Hale Landis's ATADRVR (www.ata-atapi.com), and
755 * later found its way into the ATA/ATAPI spec.
757 * Write a pattern to the ATA shadow registers,
758 * and if a device is present, it will respond by
759 * correctly storing and echoing back the
760 * ATA shadow register contents.
766 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
769 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
772 ap
->ops
->dev_select(ap
, device
);
774 outb(0x55, ioaddr
->nsect_addr
);
775 outb(0xaa, ioaddr
->lbal_addr
);
777 outb(0xaa, ioaddr
->nsect_addr
);
778 outb(0x55, ioaddr
->lbal_addr
);
780 outb(0x55, ioaddr
->nsect_addr
);
781 outb(0xaa, ioaddr
->lbal_addr
);
783 nsect
= inb(ioaddr
->nsect_addr
);
784 lbal
= inb(ioaddr
->lbal_addr
);
786 if ((nsect
== 0x55) && (lbal
== 0xaa))
787 return 1; /* we found a device */
789 return 0; /* nothing found */
793 * ata_mmio_devchk - PATA device presence detection
794 * @ap: ATA channel to examine
795 * @device: Device to examine (starting at zero)
797 * This technique was originally described in
798 * Hale Landis's ATADRVR (www.ata-atapi.com), and
799 * later found its way into the ATA/ATAPI spec.
801 * Write a pattern to the ATA shadow registers,
802 * and if a device is present, it will respond by
803 * correctly storing and echoing back the
804 * ATA shadow register contents.
810 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
813 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
816 ap
->ops
->dev_select(ap
, device
);
818 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
819 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
821 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
822 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
824 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
825 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
827 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
828 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
830 if ((nsect
== 0x55) && (lbal
== 0xaa))
831 return 1; /* we found a device */
833 return 0; /* nothing found */
837 * ata_devchk - PATA device presence detection
838 * @ap: ATA channel to examine
839 * @device: Device to examine (starting at zero)
841 * Dispatch ATA device presence detection, depending
842 * on whether we are using PIO or MMIO to talk to the
843 * ATA shadow registers.
849 static unsigned int ata_devchk(struct ata_port
*ap
,
852 if (ap
->flags
& ATA_FLAG_MMIO
)
853 return ata_mmio_devchk(ap
, device
);
854 return ata_pio_devchk(ap
, device
);
858 * ata_dev_classify - determine device type based on ATA-spec signature
859 * @tf: ATA taskfile register set for device to be identified
861 * Determine from taskfile register contents whether a device is
862 * ATA or ATAPI, as per "Signature and persistence" section
863 * of ATA/PI spec (volume 1, sect 5.14).
869 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
870 * the event of failure.
873 unsigned int ata_dev_classify(struct ata_taskfile
*tf
)
875 /* Apple's open source Darwin code hints that some devices only
876 * put a proper signature into the LBA mid/high registers,
877 * So, we only check those. It's sufficient for uniqueness.
880 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
881 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
882 DPRINTK("found ATA device by sig\n");
886 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
887 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
888 DPRINTK("found ATAPI device by sig\n");
889 return ATA_DEV_ATAPI
;
892 DPRINTK("unknown device\n");
893 return ATA_DEV_UNKNOWN
;
897 * ata_dev_try_classify - Parse returned ATA device signature
898 * @ap: ATA channel to examine
899 * @device: Device to examine (starting at zero)
901 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
902 * an ATA/ATAPI-defined set of values is placed in the ATA
903 * shadow registers, indicating the results of device detection
906 * Select the ATA device, and read the values from the ATA shadow
907 * registers. Then parse according to the Error register value,
908 * and the spec-defined values examined by ata_dev_classify().
914 static u8
ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
)
916 struct ata_device
*dev
= &ap
->device
[device
];
917 struct ata_taskfile tf
;
921 ap
->ops
->dev_select(ap
, device
);
923 memset(&tf
, 0, sizeof(tf
));
925 err
= ata_chk_err(ap
);
926 ap
->ops
->tf_read(ap
, &tf
);
928 dev
->class = ATA_DEV_NONE
;
930 /* see if device passed diags */
933 else if ((device
== 0) && (err
== 0x81))
938 /* determine if device if ATA or ATAPI */
939 class = ata_dev_classify(&tf
);
940 if (class == ATA_DEV_UNKNOWN
)
942 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
951 * ata_dev_id_string - Convert IDENTIFY DEVICE page into string
952 * @id: IDENTIFY DEVICE results we will examine
953 * @s: string into which data is output
954 * @ofs: offset into identify device page
955 * @len: length of string to return. must be an even number.
957 * The strings in the IDENTIFY DEVICE page are broken up into
958 * 16-bit chunks. Run through the string, and output each
959 * 8-bit chunk linearly, regardless of platform.
965 void ata_dev_id_string(u16
*id
, unsigned char *s
,
966 unsigned int ofs
, unsigned int len
)
986 * ata_noop_dev_select - Select device 0/1 on ATA bus
987 * @ap: ATA channel to manipulate
988 * @device: ATA device (numbered from zero) to select
990 * This function performs no actual function.
992 * May be used as the dev_select() entry in ata_port_operations.
997 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
1003 * ata_std_dev_select - Select device 0/1 on ATA bus
1004 * @ap: ATA channel to manipulate
1005 * @device: ATA device (numbered from zero) to select
1007 * Use the method defined in the ATA specification to
1008 * make either device 0, or device 1, active on the
1009 * ATA channel. Works with both PIO and MMIO.
1011 * May be used as the dev_select() entry in ata_port_operations.
1017 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
1022 tmp
= ATA_DEVICE_OBS
;
1024 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
1026 if (ap
->flags
& ATA_FLAG_MMIO
) {
1027 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
1029 outb(tmp
, ap
->ioaddr
.device_addr
);
1031 ata_pause(ap
); /* needed; also flushes, for mmio */
1035 * ata_dev_select - Select device 0/1 on ATA bus
1036 * @ap: ATA channel to manipulate
1037 * @device: ATA device (numbered from zero) to select
1038 * @wait: non-zero to wait for Status register BSY bit to clear
1039 * @can_sleep: non-zero if context allows sleeping
1041 * Use the method defined in the ATA specification to
1042 * make either device 0, or device 1, active on the
1045 * This is a high-level version of ata_std_dev_select(),
1046 * which additionally provides the services of inserting
1047 * the proper pauses and status polling, where needed.
1053 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
1054 unsigned int wait
, unsigned int can_sleep
)
1056 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
1057 ap
->id
, device
, wait
);
1062 ap
->ops
->dev_select(ap
, device
);
1065 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
1072 * ata_dump_id - IDENTIFY DEVICE info debugging output
1073 * @dev: Device whose IDENTIFY DEVICE page we will dump
1075 * Dump selected 16-bit words from a detected device's
1076 * IDENTIFY PAGE page.
1082 static inline void ata_dump_id(struct ata_device
*dev
)
1084 DPRINTK("49==0x%04x "
1094 DPRINTK("80==0x%04x "
1104 DPRINTK("88==0x%04x "
1111 * ata_dev_identify - obtain IDENTIFY x DEVICE page
1112 * @ap: port on which device we wish to probe resides
1113 * @device: device bus address, starting at zero
1115 * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE
1116 * command, and read back the 512-byte device information page.
1117 * The device information page is fed to us via the standard
1118 * PIO-IN protocol, but we hand-code it here. (TODO: investigate
1119 * using standard PIO-IN paths)
1121 * After reading the device information page, we use several
1122 * bits of information from it to initialize data structures
1123 * that will be used during the lifetime of the ata_device.
1124 * Other data from the info page is used to disqualify certain
1125 * older ATA devices we do not wish to support.
1128 * Inherited from caller. Some functions called by this function
1129 * obtain the host_set lock.
1132 static void ata_dev_identify(struct ata_port
*ap
, unsigned int device
)
1134 struct ata_device
*dev
= &ap
->device
[device
];
1135 unsigned int major_version
;
1137 unsigned long xfer_modes
;
1139 unsigned int using_edd
;
1140 DECLARE_COMPLETION(wait
);
1141 struct ata_queued_cmd
*qc
;
1142 unsigned long flags
;
1145 if (!ata_dev_present(dev
)) {
1146 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1151 if (ap
->flags
& (ATA_FLAG_SRST
| ATA_FLAG_SATA_RESET
))
1156 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, device
);
1158 assert (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ATAPI
||
1159 dev
->class == ATA_DEV_NONE
);
1161 ata_dev_select(ap
, device
, 1, 1); /* select device 0/1 */
1163 qc
= ata_qc_new_init(ap
, dev
);
1166 ata_sg_init_one(qc
, dev
->id
, sizeof(dev
->id
));
1167 qc
->dma_dir
= DMA_FROM_DEVICE
;
1168 qc
->tf
.protocol
= ATA_PROT_PIO
;
1172 if (dev
->class == ATA_DEV_ATA
) {
1173 qc
->tf
.command
= ATA_CMD_ID_ATA
;
1174 DPRINTK("do ATA identify\n");
1176 qc
->tf
.command
= ATA_CMD_ID_ATAPI
;
1177 DPRINTK("do ATAPI identify\n");
1180 qc
->waiting
= &wait
;
1181 qc
->complete_fn
= ata_qc_complete_noop
;
1183 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1184 rc
= ata_qc_issue(qc
);
1185 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1190 wait_for_completion(&wait
);
1192 status
= ata_chk_status(ap
);
1193 if (status
& ATA_ERR
) {
1195 * arg! EDD works for all test cases, but seems to return
1196 * the ATA signature for some ATAPI devices. Until the
1197 * reason for this is found and fixed, we fix up the mess
1198 * here. If IDENTIFY DEVICE returns command aborted
1199 * (as ATAPI devices do), then we issue an
1200 * IDENTIFY PACKET DEVICE.
1202 * ATA software reset (SRST, the default) does not appear
1203 * to have this problem.
1205 if ((using_edd
) && (qc
->tf
.command
== ATA_CMD_ID_ATA
)) {
1206 u8 err
= ata_chk_err(ap
);
1207 if (err
& ATA_ABORTED
) {
1208 dev
->class = ATA_DEV_ATAPI
;
1219 swap_buf_le16(dev
->id
, ATA_ID_WORDS
);
1221 /* print device capabilities */
1222 printk(KERN_DEBUG
"ata%u: dev %u cfg "
1223 "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1224 ap
->id
, device
, dev
->id
[49],
1225 dev
->id
[82], dev
->id
[83], dev
->id
[84],
1226 dev
->id
[85], dev
->id
[86], dev
->id
[87],
1230 * common ATA, ATAPI feature tests
1233 /* we require DMA support (bits 8 of word 49) */
1234 if (!ata_id_has_dma(dev
->id
)) {
1235 printk(KERN_DEBUG
"ata%u: no dma\n", ap
->id
);
1239 /* quick-n-dirty find max transfer mode; for printk only */
1240 xfer_modes
= dev
->id
[ATA_ID_UDMA_MODES
];
1242 xfer_modes
= (dev
->id
[ATA_ID_MWDMA_MODES
]) << ATA_SHIFT_MWDMA
;
1244 xfer_modes
= (dev
->id
[ATA_ID_PIO_MODES
]) << (ATA_SHIFT_PIO
+ 3);
1245 xfer_modes
|= (0x7 << ATA_SHIFT_PIO
);
1250 /* ATA-specific feature tests */
1251 if (dev
->class == ATA_DEV_ATA
) {
1252 if (!ata_id_is_ata(dev
->id
)) /* sanity check */
1255 /* get major version */
1256 tmp
= dev
->id
[ATA_ID_MAJOR_VER
];
1257 for (major_version
= 14; major_version
>= 1; major_version
--)
1258 if (tmp
& (1 << major_version
))
1262 * The exact sequence expected by certain pre-ATA4 drives is:
1265 * INITIALIZE DEVICE PARAMETERS
1267 * Some drives were very specific about that exact sequence.
1269 if (major_version
< 4 || (!ata_id_has_lba(dev
->id
)))
1270 ata_dev_init_params(ap
, dev
);
1272 if (ata_id_has_lba(dev
->id
)) {
1273 dev
->flags
|= ATA_DFLAG_LBA
;
1275 if (ata_id_has_lba48(dev
->id
)) {
1276 dev
->flags
|= ATA_DFLAG_LBA48
;
1277 dev
->n_sectors
= ata_id_u64(dev
->id
, 100);
1279 dev
->n_sectors
= ata_id_u32(dev
->id
, 60);
1282 /* print device info to dmesg */
1283 printk(KERN_INFO
"ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n",
1286 ata_mode_string(xfer_modes
),
1287 (unsigned long long)dev
->n_sectors
,
1288 dev
->flags
& ATA_DFLAG_LBA48
? " LBA48" : " LBA");
1292 /* Default translation */
1293 dev
->cylinders
= dev
->id
[1];
1294 dev
->heads
= dev
->id
[3];
1295 dev
->sectors
= dev
->id
[6];
1296 dev
->n_sectors
= dev
->cylinders
* dev
->heads
* dev
->sectors
;
1298 if (ata_id_current_chs_valid(dev
->id
)) {
1299 /* Current CHS translation is valid. */
1300 dev
->cylinders
= dev
->id
[54];
1301 dev
->heads
= dev
->id
[55];
1302 dev
->sectors
= dev
->id
[56];
1304 dev
->n_sectors
= ata_id_u32(dev
->id
, 57);
1307 /* print device info to dmesg */
1308 printk(KERN_INFO
"ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n",
1311 ata_mode_string(xfer_modes
),
1312 (unsigned long long)dev
->n_sectors
,
1313 (int)dev
->cylinders
, (int)dev
->heads
, (int)dev
->sectors
);
1317 ap
->host
->max_cmd_len
= 16;
1320 /* ATAPI-specific feature tests */
1322 if (ata_id_is_ata(dev
->id
)) /* sanity check */
1325 rc
= atapi_cdb_len(dev
->id
);
1326 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1327 printk(KERN_WARNING
"ata%u: unsupported CDB len\n", ap
->id
);
1330 ap
->cdb_len
= (unsigned int) rc
;
1331 ap
->host
->max_cmd_len
= (unsigned char) ap
->cdb_len
;
1333 if (ata_id_cdb_intr(dev
->id
))
1334 dev
->flags
|= ATA_DFLAG_CDB_INTR
;
1336 /* print device info to dmesg */
1337 printk(KERN_INFO
"ata%u: dev %u ATAPI, max %s\n",
1339 ata_mode_string(xfer_modes
));
1342 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1346 printk(KERN_WARNING
"ata%u: dev %u not supported, ignoring\n",
1349 dev
->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */
1350 DPRINTK("EXIT, err\n");
1354 static inline u8
ata_dev_knobble(struct ata_port
*ap
)
1356 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(ap
->device
->id
)));
1360 * ata_dev_config - Run device specific handlers and check for
1361 * SATA->PATA bridges
1368 void ata_dev_config(struct ata_port
*ap
, unsigned int i
)
1370 /* limit bridge transfers to udma5, 200 sectors */
1371 if (ata_dev_knobble(ap
)) {
1372 printk(KERN_INFO
"ata%u(%u): applying bridge limits\n",
1373 ap
->id
, ap
->device
->devno
);
1374 ap
->udma_mask
&= ATA_UDMA5
;
1375 ap
->host
->max_sectors
= ATA_MAX_SECTORS
;
1376 ap
->host
->hostt
->max_sectors
= ATA_MAX_SECTORS
;
1377 ap
->device
->flags
|= ATA_DFLAG_LOCK_SECTORS
;
1380 if (ap
->ops
->dev_config
)
1381 ap
->ops
->dev_config(ap
, &ap
->device
[i
]);
1385 * ata_bus_probe - Reset and probe ATA bus
1388 * Master ATA bus probing function. Initiates a hardware-dependent
1389 * bus reset, then attempts to identify any devices found on
1393 * PCI/etc. bus probe sem.
1396 * Zero on success, non-zero on error.
1399 static int ata_bus_probe(struct ata_port
*ap
)
1401 unsigned int i
, found
= 0;
1403 ap
->ops
->phy_reset(ap
);
1404 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1407 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1408 ata_dev_identify(ap
, i
);
1409 if (ata_dev_present(&ap
->device
[i
])) {
1411 ata_dev_config(ap
,i
);
1415 if ((!found
) || (ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1416 goto err_out_disable
;
1419 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1420 goto err_out_disable
;
1425 ap
->ops
->port_disable(ap
);
1431 * ata_port_probe - Mark port as enabled
1432 * @ap: Port for which we indicate enablement
1434 * Modify @ap data structure such that the system
1435 * thinks that the entire port is enabled.
1437 * LOCKING: host_set lock, or some other form of
1441 void ata_port_probe(struct ata_port
*ap
)
1443 ap
->flags
&= ~ATA_FLAG_PORT_DISABLED
;
1447 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1448 * @ap: SATA port associated with target SATA PHY.
1450 * This function issues commands to standard SATA Sxxx
1451 * PHY registers, to wake up the phy (and device), and
1452 * clear any reset condition.
1455 * PCI/etc. bus probe sem.
1458 void __sata_phy_reset(struct ata_port
*ap
)
1461 unsigned long timeout
= jiffies
+ (HZ
* 5);
1463 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1464 /* issue phy wake/reset */
1465 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1466 /* Couldn't find anything in SATA I/II specs, but
1467 * AHCI-1.1 10.4.2 says at least 1 ms. */
1470 scr_write_flush(ap
, SCR_CONTROL
, 0x300); /* phy wake/clear reset */
1472 /* wait for phy to become ready, if necessary */
1475 sstatus
= scr_read(ap
, SCR_STATUS
);
1476 if ((sstatus
& 0xf) != 1)
1478 } while (time_before(jiffies
, timeout
));
1480 /* TODO: phy layer with polling, timeouts, etc. */
1481 if (sata_dev_present(ap
))
1484 sstatus
= scr_read(ap
, SCR_STATUS
);
1485 printk(KERN_INFO
"ata%u: no device found (phy stat %08x)\n",
1487 ata_port_disable(ap
);
1490 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1493 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1494 ata_port_disable(ap
);
1498 ap
->cbl
= ATA_CBL_SATA
;
1502 * sata_phy_reset - Reset SATA bus.
1503 * @ap: SATA port associated with target SATA PHY.
1505 * This function resets the SATA bus, and then probes
1506 * the bus for devices.
1509 * PCI/etc. bus probe sem.
1512 void sata_phy_reset(struct ata_port
*ap
)
1514 __sata_phy_reset(ap
);
1515 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1521 * ata_port_disable - Disable port.
1522 * @ap: Port to be disabled.
1524 * Modify @ap data structure such that the system
1525 * thinks that the entire port is disabled, and should
1526 * never attempt to probe or communicate with devices
1529 * LOCKING: host_set lock, or some other form of
1533 void ata_port_disable(struct ata_port
*ap
)
1535 ap
->device
[0].class = ATA_DEV_NONE
;
1536 ap
->device
[1].class = ATA_DEV_NONE
;
1537 ap
->flags
|= ATA_FLAG_PORT_DISABLED
;
1543 } xfer_mode_classes
[] = {
1544 { ATA_SHIFT_UDMA
, XFER_UDMA_0
},
1545 { ATA_SHIFT_MWDMA
, XFER_MW_DMA_0
},
1546 { ATA_SHIFT_PIO
, XFER_PIO_0
},
1549 static inline u8
base_from_shift(unsigned int shift
)
1553 for (i
= 0; i
< ARRAY_SIZE(xfer_mode_classes
); i
++)
1554 if (xfer_mode_classes
[i
].shift
== shift
)
1555 return xfer_mode_classes
[i
].base
;
1560 static void ata_dev_set_mode(struct ata_port
*ap
, struct ata_device
*dev
)
1565 if (!ata_dev_present(dev
) || (ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1568 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
1569 dev
->flags
|= ATA_DFLAG_PIO
;
1571 ata_dev_set_xfermode(ap
, dev
);
1573 base
= base_from_shift(dev
->xfer_shift
);
1574 ofs
= dev
->xfer_mode
- base
;
1575 idx
= ofs
+ dev
->xfer_shift
;
1576 WARN_ON(idx
>= ARRAY_SIZE(xfer_mode_str
));
1578 DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n",
1579 idx
, dev
->xfer_shift
, (int)dev
->xfer_mode
, (int)base
, ofs
);
1581 printk(KERN_INFO
"ata%u: dev %u configured for %s\n",
1582 ap
->id
, dev
->devno
, xfer_mode_str
[idx
]);
1585 static int ata_host_set_pio(struct ata_port
*ap
)
1591 mask
= ata_get_mode_mask(ap
, ATA_SHIFT_PIO
);
1594 printk(KERN_WARNING
"ata%u: no PIO support\n", ap
->id
);
1598 base
= base_from_shift(ATA_SHIFT_PIO
);
1599 xfer_mode
= base
+ x
;
1601 DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n",
1602 (int)base
, (int)xfer_mode
, mask
, x
);
1604 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1605 struct ata_device
*dev
= &ap
->device
[i
];
1606 if (ata_dev_present(dev
)) {
1607 dev
->pio_mode
= xfer_mode
;
1608 dev
->xfer_mode
= xfer_mode
;
1609 dev
->xfer_shift
= ATA_SHIFT_PIO
;
1610 if (ap
->ops
->set_piomode
)
1611 ap
->ops
->set_piomode(ap
, dev
);
1618 static void ata_host_set_dma(struct ata_port
*ap
, u8 xfer_mode
,
1619 unsigned int xfer_shift
)
1623 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1624 struct ata_device
*dev
= &ap
->device
[i
];
1625 if (ata_dev_present(dev
)) {
1626 dev
->dma_mode
= xfer_mode
;
1627 dev
->xfer_mode
= xfer_mode
;
1628 dev
->xfer_shift
= xfer_shift
;
1629 if (ap
->ops
->set_dmamode
)
1630 ap
->ops
->set_dmamode(ap
, dev
);
1636 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1637 * @ap: port on which timings will be programmed
1639 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1642 * PCI/etc. bus probe sem.
1645 static void ata_set_mode(struct ata_port
*ap
)
1647 unsigned int i
, xfer_shift
;
1651 /* step 1: always set host PIO timings */
1652 rc
= ata_host_set_pio(ap
);
1656 /* step 2: choose the best data xfer mode */
1657 xfer_mode
= xfer_shift
= 0;
1658 rc
= ata_choose_xfer_mode(ap
, &xfer_mode
, &xfer_shift
);
1662 /* step 3: if that xfer mode isn't PIO, set host DMA timings */
1663 if (xfer_shift
!= ATA_SHIFT_PIO
)
1664 ata_host_set_dma(ap
, xfer_mode
, xfer_shift
);
1666 /* step 4: update devices' xfer mode */
1667 ata_dev_set_mode(ap
, &ap
->device
[0]);
1668 ata_dev_set_mode(ap
, &ap
->device
[1]);
1670 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1673 if (ap
->ops
->post_set_mode
)
1674 ap
->ops
->post_set_mode(ap
);
1676 for (i
= 0; i
< 2; i
++) {
1677 struct ata_device
*dev
= &ap
->device
[i
];
1678 ata_dev_set_protocol(dev
);
1684 ata_port_disable(ap
);
1688 * ata_busy_sleep - sleep until BSY clears, or timeout
1689 * @ap: port containing status register to be polled
1690 * @tmout_pat: impatience timeout
1691 * @tmout: overall timeout
1693 * Sleep until ATA Status register bit BSY clears,
1694 * or a timeout occurs.
1700 static unsigned int ata_busy_sleep (struct ata_port
*ap
,
1701 unsigned long tmout_pat
,
1702 unsigned long tmout
)
1704 unsigned long timer_start
, timeout
;
1707 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
1708 timer_start
= jiffies
;
1709 timeout
= timer_start
+ tmout_pat
;
1710 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1712 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
1715 if (status
& ATA_BUSY
)
1716 printk(KERN_WARNING
"ata%u is slow to respond, "
1717 "please be patient\n", ap
->id
);
1719 timeout
= timer_start
+ tmout
;
1720 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1722 status
= ata_chk_status(ap
);
1725 if (status
& ATA_BUSY
) {
1726 printk(KERN_ERR
"ata%u failed to respond (%lu secs)\n",
1727 ap
->id
, tmout
/ HZ
);
1734 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
1736 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1737 unsigned int dev0
= devmask
& (1 << 0);
1738 unsigned int dev1
= devmask
& (1 << 1);
1739 unsigned long timeout
;
1741 /* if device 0 was found in ata_devchk, wait for its
1745 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1747 /* if device 1 was found in ata_devchk, wait for
1748 * register access, then wait for BSY to clear
1750 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
1754 ap
->ops
->dev_select(ap
, 1);
1755 if (ap
->flags
& ATA_FLAG_MMIO
) {
1756 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
1757 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
1759 nsect
= inb(ioaddr
->nsect_addr
);
1760 lbal
= inb(ioaddr
->lbal_addr
);
1762 if ((nsect
== 1) && (lbal
== 1))
1764 if (time_after(jiffies
, timeout
)) {
1768 msleep(50); /* give drive a breather */
1771 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1773 /* is all this really necessary? */
1774 ap
->ops
->dev_select(ap
, 0);
1776 ap
->ops
->dev_select(ap
, 1);
1778 ap
->ops
->dev_select(ap
, 0);
1782 * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
1783 * @ap: Port to reset and probe
1785 * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
1786 * probe the bus. Not often used these days.
1789 * PCI/etc. bus probe sem.
1793 static unsigned int ata_bus_edd(struct ata_port
*ap
)
1795 struct ata_taskfile tf
;
1797 /* set up execute-device-diag (bus reset) taskfile */
1798 /* also, take interrupts to a known state (disabled) */
1799 DPRINTK("execute-device-diag\n");
1800 ata_tf_init(ap
, &tf
, 0);
1802 tf
.command
= ATA_CMD_EDD
;
1803 tf
.protocol
= ATA_PROT_NODATA
;
1806 ata_tf_to_host(ap
, &tf
);
1808 /* spec says at least 2ms. but who knows with those
1809 * crazy ATAPI devices...
1813 return ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1816 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
1817 unsigned int devmask
)
1819 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1821 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
1823 /* software reset. causes dev0 to be selected */
1824 if (ap
->flags
& ATA_FLAG_MMIO
) {
1825 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
1826 udelay(20); /* FIXME: flush */
1827 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
1828 udelay(20); /* FIXME: flush */
1829 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
1831 outb(ap
->ctl
, ioaddr
->ctl_addr
);
1833 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
1835 outb(ap
->ctl
, ioaddr
->ctl_addr
);
1838 /* spec mandates ">= 2ms" before checking status.
1839 * We wait 150ms, because that was the magic delay used for
1840 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
1841 * between when the ATA command register is written, and then
1842 * status is checked. Because waiting for "a while" before
1843 * checking status is fine, post SRST, we perform this magic
1844 * delay here as well.
1848 ata_bus_post_reset(ap
, devmask
);
1854 * ata_bus_reset - reset host port and associated ATA channel
1855 * @ap: port to reset
1857 * This is typically the first time we actually start issuing
1858 * commands to the ATA channel. We wait for BSY to clear, then
1859 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
1860 * result. Determine what devices, if any, are on the channel
1861 * by looking at the device 0/1 error register. Look at the signature
1862 * stored in each device's taskfile registers, to determine if
1863 * the device is ATA or ATAPI.
1866 * PCI/etc. bus probe sem.
1867 * Obtains host_set lock.
1870 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
1873 void ata_bus_reset(struct ata_port
*ap
)
1875 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1876 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
1878 unsigned int dev0
, dev1
= 0, rc
= 0, devmask
= 0;
1880 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
1882 /* determine if device 0/1 are present */
1883 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
1886 dev0
= ata_devchk(ap
, 0);
1888 dev1
= ata_devchk(ap
, 1);
1892 devmask
|= (1 << 0);
1894 devmask
|= (1 << 1);
1896 /* select device 0 again */
1897 ap
->ops
->dev_select(ap
, 0);
1899 /* issue bus reset */
1900 if (ap
->flags
& ATA_FLAG_SRST
)
1901 rc
= ata_bus_softreset(ap
, devmask
);
1902 else if ((ap
->flags
& ATA_FLAG_SATA_RESET
) == 0) {
1903 /* set up device control */
1904 if (ap
->flags
& ATA_FLAG_MMIO
)
1905 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
1907 outb(ap
->ctl
, ioaddr
->ctl_addr
);
1908 rc
= ata_bus_edd(ap
);
1915 * determine by signature whether we have ATA or ATAPI devices
1917 err
= ata_dev_try_classify(ap
, 0);
1918 if ((slave_possible
) && (err
!= 0x81))
1919 ata_dev_try_classify(ap
, 1);
1921 /* re-enable interrupts */
1922 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
1925 /* is double-select really necessary? */
1926 if (ap
->device
[1].class != ATA_DEV_NONE
)
1927 ap
->ops
->dev_select(ap
, 1);
1928 if (ap
->device
[0].class != ATA_DEV_NONE
)
1929 ap
->ops
->dev_select(ap
, 0);
1931 /* if no devices were detected, disable this port */
1932 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
1933 (ap
->device
[1].class == ATA_DEV_NONE
))
1936 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
1937 /* set up device control for ATA_FLAG_SATA_RESET */
1938 if (ap
->flags
& ATA_FLAG_MMIO
)
1939 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
1941 outb(ap
->ctl
, ioaddr
->ctl_addr
);
1948 printk(KERN_ERR
"ata%u: disabling port\n", ap
->id
);
1949 ap
->ops
->port_disable(ap
);
1954 static void ata_pr_blacklisted(struct ata_port
*ap
, struct ata_device
*dev
)
1956 printk(KERN_WARNING
"ata%u: dev %u is on DMA blacklist, disabling DMA\n",
1957 ap
->id
, dev
->devno
);
1960 static const char * ata_dma_blacklist
[] = {
1979 "Toshiba CD-ROM XM-6202B",
1980 "TOSHIBA CD-ROM XM-1702BC",
1982 "E-IDE CD-ROM CR-840",
1985 "SAMSUNG CD-ROM SC-148C",
1986 "SAMSUNG CD-ROM SC",
1988 "ATAPI CD-ROM DRIVE 40X MAXIMUM",
1992 static int ata_dma_blacklisted(struct ata_port
*ap
, struct ata_device
*dev
)
1994 unsigned char model_num
[40];
1999 ata_dev_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2002 len
= strnlen(s
, sizeof(model_num
));
2004 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2005 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2010 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
++)
2011 if (!strncmp(ata_dma_blacklist
[i
], s
, len
))
2017 static unsigned int ata_get_mode_mask(struct ata_port
*ap
, int shift
)
2019 struct ata_device
*master
, *slave
;
2022 master
= &ap
->device
[0];
2023 slave
= &ap
->device
[1];
2025 assert (ata_dev_present(master
) || ata_dev_present(slave
));
2027 if (shift
== ATA_SHIFT_UDMA
) {
2028 mask
= ap
->udma_mask
;
2029 if (ata_dev_present(master
)) {
2030 mask
&= (master
->id
[ATA_ID_UDMA_MODES
] & 0xff);
2031 if (ata_dma_blacklisted(ap
, master
)) {
2033 ata_pr_blacklisted(ap
, master
);
2036 if (ata_dev_present(slave
)) {
2037 mask
&= (slave
->id
[ATA_ID_UDMA_MODES
] & 0xff);
2038 if (ata_dma_blacklisted(ap
, slave
)) {
2040 ata_pr_blacklisted(ap
, slave
);
2044 else if (shift
== ATA_SHIFT_MWDMA
) {
2045 mask
= ap
->mwdma_mask
;
2046 if (ata_dev_present(master
)) {
2047 mask
&= (master
->id
[ATA_ID_MWDMA_MODES
] & 0x07);
2048 if (ata_dma_blacklisted(ap
, master
)) {
2050 ata_pr_blacklisted(ap
, master
);
2053 if (ata_dev_present(slave
)) {
2054 mask
&= (slave
->id
[ATA_ID_MWDMA_MODES
] & 0x07);
2055 if (ata_dma_blacklisted(ap
, slave
)) {
2057 ata_pr_blacklisted(ap
, slave
);
2061 else if (shift
== ATA_SHIFT_PIO
) {
2062 mask
= ap
->pio_mask
;
2063 if (ata_dev_present(master
)) {
2064 /* spec doesn't return explicit support for
2065 * PIO0-2, so we fake it
2067 u16 tmp_mode
= master
->id
[ATA_ID_PIO_MODES
] & 0x03;
2072 if (ata_dev_present(slave
)) {
2073 /* spec doesn't return explicit support for
2074 * PIO0-2, so we fake it
2076 u16 tmp_mode
= slave
->id
[ATA_ID_PIO_MODES
] & 0x03;
2083 mask
= 0xffffffff; /* shut up compiler warning */
2090 /* find greatest bit */
2091 static int fgb(u32 bitmap
)
2096 for (i
= 0; i
< 32; i
++)
2097 if (bitmap
& (1 << i
))
2104 * ata_choose_xfer_mode - attempt to find best transfer mode
2105 * @ap: Port for which an xfer mode will be selected
2106 * @xfer_mode_out: (output) SET FEATURES - XFER MODE code
2107 * @xfer_shift_out: (output) bit shift that selects this mode
2109 * Based on host and device capabilities, determine the
2110 * maximum transfer mode that is amenable to all.
2113 * PCI/etc. bus probe sem.
2116 * Zero on success, negative on error.
2119 static int ata_choose_xfer_mode(struct ata_port
*ap
,
2121 unsigned int *xfer_shift_out
)
2123 unsigned int mask
, shift
;
2126 for (i
= 0; i
< ARRAY_SIZE(xfer_mode_classes
); i
++) {
2127 shift
= xfer_mode_classes
[i
].shift
;
2128 mask
= ata_get_mode_mask(ap
, shift
);
2132 *xfer_mode_out
= xfer_mode_classes
[i
].base
+ x
;
2133 *xfer_shift_out
= shift
;
2142 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2143 * @ap: Port associated with device @dev
2144 * @dev: Device to which command will be sent
2146 * Issue SET FEATURES - XFER MODE command to device @dev
2150 * PCI/etc. bus probe sem.
2153 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
)
2155 DECLARE_COMPLETION(wait
);
2156 struct ata_queued_cmd
*qc
;
2158 unsigned long flags
;
2160 /* set up set-features taskfile */
2161 DPRINTK("set features - xfer mode\n");
2163 qc
= ata_qc_new_init(ap
, dev
);
2166 qc
->tf
.command
= ATA_CMD_SET_FEATURES
;
2167 qc
->tf
.feature
= SETFEATURES_XFER
;
2168 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2169 qc
->tf
.protocol
= ATA_PROT_NODATA
;
2170 qc
->tf
.nsect
= dev
->xfer_mode
;
2172 qc
->waiting
= &wait
;
2173 qc
->complete_fn
= ata_qc_complete_noop
;
2175 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2176 rc
= ata_qc_issue(qc
);
2177 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2180 ata_port_disable(ap
);
2182 wait_for_completion(&wait
);
2188 * ata_dev_init_params - Issue INIT DEV PARAMS command
2189 * @ap: Port associated with device @dev
2190 * @dev: Device to which command will be sent
2195 static void ata_dev_init_params(struct ata_port
*ap
, struct ata_device
*dev
)
2197 DECLARE_COMPLETION(wait
);
2198 struct ata_queued_cmd
*qc
;
2200 unsigned long flags
;
2201 u16 sectors
= dev
->id
[6];
2202 u16 heads
= dev
->id
[3];
2204 /* Number of sectors per track 1-255. Number of heads 1-16 */
2205 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
2208 /* set up init dev params taskfile */
2209 DPRINTK("init dev params \n");
2211 qc
= ata_qc_new_init(ap
, dev
);
2214 qc
->tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
2215 qc
->tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2216 qc
->tf
.protocol
= ATA_PROT_NODATA
;
2217 qc
->tf
.nsect
= sectors
;
2218 qc
->tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
2220 qc
->waiting
= &wait
;
2221 qc
->complete_fn
= ata_qc_complete_noop
;
2223 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2224 rc
= ata_qc_issue(qc
);
2225 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2228 ata_port_disable(ap
);
2230 wait_for_completion(&wait
);
2236 * ata_sg_clean - Unmap DMA memory associated with command
2237 * @qc: Command containing DMA memory to be released
2239 * Unmap all mapped DMA memory associated with this command.
2242 * spin_lock_irqsave(host_set lock)
2245 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
2247 struct ata_port
*ap
= qc
->ap
;
2248 struct scatterlist
*sg
= qc
->sg
;
2249 int dir
= qc
->dma_dir
;
2251 assert(qc
->flags
& ATA_QCFLAG_DMAMAP
);
2254 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
2255 assert(qc
->n_elem
== 1);
2257 DPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
2259 if (qc
->flags
& ATA_QCFLAG_SG
)
2260 dma_unmap_sg(ap
->host_set
->dev
, sg
, qc
->n_elem
, dir
);
2262 dma_unmap_single(ap
->host_set
->dev
, sg_dma_address(&sg
[0]),
2263 sg_dma_len(&sg
[0]), dir
);
2265 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
2270 * ata_fill_sg - Fill PCI IDE PRD table
2271 * @qc: Metadata associated with taskfile to be transferred
2273 * Fill PCI IDE PRD (scatter-gather) table with segments
2274 * associated with the current disk command.
2277 * spin_lock_irqsave(host_set lock)
2280 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
2282 struct scatterlist
*sg
= qc
->sg
;
2283 struct ata_port
*ap
= qc
->ap
;
2284 unsigned int idx
, nelem
;
2287 assert(qc
->n_elem
> 0);
2290 for (nelem
= qc
->n_elem
; nelem
; nelem
--,sg
++) {
2294 /* determine if physical DMA addr spans 64K boundary.
2295 * Note h/w doesn't support 64-bit, so we unconditionally
2296 * truncate dma_addr_t to u32.
2298 addr
= (u32
) sg_dma_address(sg
);
2299 sg_len
= sg_dma_len(sg
);
2302 offset
= addr
& 0xffff;
2304 if ((offset
+ sg_len
) > 0x10000)
2305 len
= 0x10000 - offset
;
2307 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
2308 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
2309 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
2318 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
2321 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2322 * @qc: Metadata associated with taskfile to check
2324 * Allow low-level driver to filter ATA PACKET commands, returning
2325 * a status indicating whether or not it is OK to use DMA for the
2326 * supplied PACKET command.
2329 * spin_lock_irqsave(host_set lock)
2331 * RETURNS: 0 when ATAPI DMA can be used
2334 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
2336 struct ata_port
*ap
= qc
->ap
;
2337 int rc
= 0; /* Assume ATAPI DMA is OK by default */
2339 if (ap
->ops
->check_atapi_dma
)
2340 rc
= ap
->ops
->check_atapi_dma(qc
);
2345 * ata_qc_prep - Prepare taskfile for submission
2346 * @qc: Metadata associated with taskfile to be prepared
2348 * Prepare ATA taskfile for submission.
2351 * spin_lock_irqsave(host_set lock)
2353 void ata_qc_prep(struct ata_queued_cmd
*qc
)
2355 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
2362 * ata_sg_init_one - Associate command with memory buffer
2363 * @qc: Command to be associated
2364 * @buf: Memory buffer
2365 * @buflen: Length of memory buffer, in bytes.
2367 * Initialize the data-related elements of queued_cmd @qc
2368 * to point to a single memory buffer, @buf of byte length @buflen.
2371 * spin_lock_irqsave(host_set lock)
2374 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
2376 struct scatterlist
*sg
;
2378 qc
->flags
|= ATA_QCFLAG_SINGLE
;
2380 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
2381 qc
->sg
= &qc
->sgent
;
2386 sg
->page
= virt_to_page(buf
);
2387 sg
->offset
= (unsigned long) buf
& ~PAGE_MASK
;
2388 sg
->length
= buflen
;
2392 * ata_sg_init - Associate command with scatter-gather table.
2393 * @qc: Command to be associated
2394 * @sg: Scatter-gather table.
2395 * @n_elem: Number of elements in s/g table.
2397 * Initialize the data-related elements of queued_cmd @qc
2398 * to point to a scatter-gather table @sg, containing @n_elem
2402 * spin_lock_irqsave(host_set lock)
2405 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
2406 unsigned int n_elem
)
2408 qc
->flags
|= ATA_QCFLAG_SG
;
2410 qc
->n_elem
= n_elem
;
2414 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2415 * @qc: Command with memory buffer to be mapped.
2417 * DMA-map the memory buffer associated with queued_cmd @qc.
2420 * spin_lock_irqsave(host_set lock)
2423 * Zero on success, negative on error.
2426 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
2428 struct ata_port
*ap
= qc
->ap
;
2429 int dir
= qc
->dma_dir
;
2430 struct scatterlist
*sg
= qc
->sg
;
2431 dma_addr_t dma_address
;
2433 dma_address
= dma_map_single(ap
->host_set
->dev
, qc
->buf_virt
,
2435 if (dma_mapping_error(dma_address
))
2438 sg_dma_address(sg
) = dma_address
;
2439 sg_dma_len(sg
) = sg
->length
;
2441 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
2442 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
2448 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
2449 * @qc: Command with scatter-gather table to be mapped.
2451 * DMA-map the scatter-gather table associated with queued_cmd @qc.
2454 * spin_lock_irqsave(host_set lock)
2457 * Zero on success, negative on error.
2461 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
2463 struct ata_port
*ap
= qc
->ap
;
2464 struct scatterlist
*sg
= qc
->sg
;
2467 VPRINTK("ENTER, ata%u\n", ap
->id
);
2468 assert(qc
->flags
& ATA_QCFLAG_SG
);
2471 n_elem
= dma_map_sg(ap
->host_set
->dev
, sg
, qc
->n_elem
, dir
);
2475 DPRINTK("%d sg elements mapped\n", n_elem
);
2477 qc
->n_elem
= n_elem
;
2483 * ata_poll_qc_complete - turn irq back on and finish qc
2484 * @qc: Command to complete
2485 * @drv_stat: ATA status register content
2488 * None. (grabs host lock)
2491 void ata_poll_qc_complete(struct ata_queued_cmd
*qc
, u8 drv_stat
)
2493 struct ata_port
*ap
= qc
->ap
;
2494 unsigned long flags
;
2496 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2498 ata_qc_complete(qc
, drv_stat
);
2499 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2507 * None. (executing in kernel thread context)
2513 static unsigned long ata_pio_poll(struct ata_port
*ap
)
2516 unsigned int poll_state
= HSM_ST_UNKNOWN
;
2517 unsigned int reg_state
= HSM_ST_UNKNOWN
;
2518 const unsigned int tmout_state
= HSM_ST_TMOUT
;
2520 switch (ap
->hsm_task_state
) {
2523 poll_state
= HSM_ST_POLL
;
2527 case HSM_ST_LAST_POLL
:
2528 poll_state
= HSM_ST_LAST_POLL
;
2529 reg_state
= HSM_ST_LAST
;
2536 status
= ata_chk_status(ap
);
2537 if (status
& ATA_BUSY
) {
2538 if (time_after(jiffies
, ap
->pio_task_timeout
)) {
2539 ap
->hsm_task_state
= tmout_state
;
2542 ap
->hsm_task_state
= poll_state
;
2543 return ATA_SHORT_PAUSE
;
2546 ap
->hsm_task_state
= reg_state
;
2551 * ata_pio_complete -
2555 * None. (executing in kernel thread context)
2558 * Non-zero if qc completed, zero otherwise.
2561 static int ata_pio_complete (struct ata_port
*ap
)
2563 struct ata_queued_cmd
*qc
;
2567 * This is purely heuristic. This is a fast path. Sometimes when
2568 * we enter, BSY will be cleared in a chk-status or two. If not,
2569 * the drive is probably seeking or something. Snooze for a couple
2570 * msecs, then chk-status again. If still busy, fall back to
2571 * HSM_ST_POLL state.
2573 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 10);
2574 if (drv_stat
& (ATA_BUSY
| ATA_DRQ
)) {
2576 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
| ATA_DRQ
, 10);
2577 if (drv_stat
& (ATA_BUSY
| ATA_DRQ
)) {
2578 ap
->hsm_task_state
= HSM_ST_LAST_POLL
;
2579 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
2584 drv_stat
= ata_wait_idle(ap
);
2585 if (!ata_ok(drv_stat
)) {
2586 ap
->hsm_task_state
= HSM_ST_ERR
;
2590 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
2593 ap
->hsm_task_state
= HSM_ST_IDLE
;
2595 ata_poll_qc_complete(qc
, drv_stat
);
2597 /* another command may start at this point */
2605 * @buf: Buffer to swap
2606 * @buf_words: Number of 16-bit words in buffer.
2608 * Swap halves of 16-bit words if needed to convert from
2609 * little-endian byte order to native cpu byte order, or
2614 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
2619 for (i
= 0; i
< buf_words
; i
++)
2620 buf
[i
] = le16_to_cpu(buf
[i
]);
2621 #endif /* __BIG_ENDIAN */
2625 * ata_mmio_data_xfer - Transfer data by MMIO
2626 * @ap: port to read/write
2628 * @buflen: buffer length
2629 * @write_data: read/write
2631 * Transfer data from/to the device data register by MMIO.
2634 * Inherited from caller.
2638 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
2639 unsigned int buflen
, int write_data
)
2642 unsigned int words
= buflen
>> 1;
2643 u16
*buf16
= (u16
*) buf
;
2644 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
2646 /* Transfer multiple of 2 bytes */
2648 for (i
= 0; i
< words
; i
++)
2649 writew(le16_to_cpu(buf16
[i
]), mmio
);
2651 for (i
= 0; i
< words
; i
++)
2652 buf16
[i
] = cpu_to_le16(readw(mmio
));
2655 /* Transfer trailing 1 byte, if any. */
2656 if (unlikely(buflen
& 0x01)) {
2657 u16 align_buf
[1] = { 0 };
2658 unsigned char *trailing_buf
= buf
+ buflen
- 1;
2661 memcpy(align_buf
, trailing_buf
, 1);
2662 writew(le16_to_cpu(align_buf
[0]), mmio
);
2664 align_buf
[0] = cpu_to_le16(readw(mmio
));
2665 memcpy(trailing_buf
, align_buf
, 1);
2671 * ata_pio_data_xfer - Transfer data by PIO
2672 * @ap: port to read/write
2674 * @buflen: buffer length
2675 * @write_data: read/write
2677 * Transfer data from/to the device data register by PIO.
2680 * Inherited from caller.
2684 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
2685 unsigned int buflen
, int write_data
)
2687 unsigned int words
= buflen
>> 1;
2689 /* Transfer multiple of 2 bytes */
2691 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
2693 insw(ap
->ioaddr
.data_addr
, buf
, words
);
2695 /* Transfer trailing 1 byte, if any. */
2696 if (unlikely(buflen
& 0x01)) {
2697 u16 align_buf
[1] = { 0 };
2698 unsigned char *trailing_buf
= buf
+ buflen
- 1;
2701 memcpy(align_buf
, trailing_buf
, 1);
2702 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
2704 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
2705 memcpy(trailing_buf
, align_buf
, 1);
2711 * ata_data_xfer - Transfer data from/to the data register.
2712 * @ap: port to read/write
2714 * @buflen: buffer length
2715 * @do_write: read/write
2717 * Transfer data from/to the device data register.
2720 * Inherited from caller.
2724 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
2725 unsigned int buflen
, int do_write
)
2727 if (ap
->flags
& ATA_FLAG_MMIO
)
2728 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
2730 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
2734 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
2735 * @qc: Command on going
2737 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
2740 * Inherited from caller.
2743 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
2745 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
2746 struct scatterlist
*sg
= qc
->sg
;
2747 struct ata_port
*ap
= qc
->ap
;
2749 unsigned int offset
;
2752 if (qc
->cursect
== (qc
->nsect
- 1))
2753 ap
->hsm_task_state
= HSM_ST_LAST
;
2755 page
= sg
[qc
->cursg
].page
;
2756 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
2758 /* get the current page and offset */
2759 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
2760 offset
%= PAGE_SIZE
;
2762 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
2764 if (PageHighMem(page
)) {
2765 unsigned long flags
;
2767 local_irq_save(flags
);
2768 buf
= kmap_atomic(page
, KM_IRQ0
);
2770 /* do the actual data transfer */
2771 ata_data_xfer(ap
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
2773 kunmap_atomic(buf
, KM_IRQ0
);
2774 local_irq_restore(flags
);
2776 buf
= page_address(page
);
2777 ata_data_xfer(ap
, buf
+ offset
, ATA_SECT_SIZE
, do_write
);
2783 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
2790 * atapi_send_cdb - Write CDB bytes to hardware
2791 * @ap: Port to which ATAPI device is attached.
2792 * @qc: Taskfile currently active
2794 * When device has indicated its readiness to accept
2795 * a CDB, this function is called. Send the CDB.
2801 static void atapi_send_cdb(struct ata_port
*ap
, struct ata_queued_cmd
*qc
)
2804 DPRINTK("send cdb\n");
2805 assert(ap
->cdb_len
>= 12);
2807 ata_data_xfer(ap
, qc
->cdb
, ap
->cdb_len
, 1);
2808 ata_altstatus(ap
); /* flush */
2810 switch (qc
->tf
.protocol
) {
2811 case ATA_PROT_ATAPI
:
2812 ap
->hsm_task_state
= HSM_ST
;
2814 case ATA_PROT_ATAPI_NODATA
:
2815 ap
->hsm_task_state
= HSM_ST_LAST
;
2817 case ATA_PROT_ATAPI_DMA
:
2818 ap
->hsm_task_state
= HSM_ST_LAST
;
2819 /* initiate bmdma */
2820 ap
->ops
->bmdma_start(qc
);
2826 * ata_dataout_task - Write first data block to hardware
2827 * @_data: Port to which ATA/ATAPI device is attached.
2829 * When device has indicated its readiness to accept
2830 * the data, this function sends out the CDB or
2831 * the first data block by PIO.
2833 * - If polling, ata_pio_task() handles the rest.
2834 * - Otherwise, interrupt handler takes over.
2837 * Kernel thread context (may sleep)
2840 static void ata_dataout_task(void *_data
)
2842 struct ata_port
*ap
= _data
;
2843 struct ata_queued_cmd
*qc
;
2845 unsigned long flags
;
2847 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
2849 assert(qc
->flags
& ATA_QCFLAG_ACTIVE
);
2851 /* sleep-wait for BSY to clear */
2852 DPRINTK("busy wait\n");
2853 if (ata_busy_sleep(ap
, ATA_TMOUT_DATAOUT_QUICK
, ATA_TMOUT_DATAOUT
))
2856 /* make sure DRQ is set */
2857 status
= ata_chk_status(ap
);
2858 if ((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
)
2861 /* Send the CDB (atapi) or the first data block (ata pio out).
2862 * During the state transition, interrupt handler shouldn't
2863 * be invoked before the data transfer is complete and
2864 * hsm_task_state is changed. Hence, the following locking.
2866 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2868 if (qc
->tf
.protocol
== ATA_PROT_PIO
) {
2869 /* PIO data out protocol.
2870 * send first data block.
2873 /* ata_pio_sector() might change the state to HSM_ST_LAST.
2874 * so, the state is changed here before ata_pio_sector().
2876 ap
->hsm_task_state
= HSM_ST
;
2878 ata_altstatus(ap
); /* flush */
2881 atapi_send_cdb(ap
, qc
);
2883 /* if polling, ata_pio_task() handles the rest.
2884 * otherwise, interrupt handler takes over from here.
2886 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
2887 queue_work(ata_wq
, &ap
->pio_task
);
2889 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2898 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
2899 * @qc: Command on going
2900 * @bytes: number of bytes
2902 * Transfer Transfer data from/to the ATAPI device.
2905 * Inherited from caller.
2909 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
2911 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
2912 struct scatterlist
*sg
= qc
->sg
;
2913 struct ata_port
*ap
= qc
->ap
;
2916 unsigned int offset
, count
;
2918 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
2919 ap
->hsm_task_state
= HSM_ST_LAST
;
2922 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
2924 * The end of qc->sg is reached and the device expects
2925 * more data to transfer. In order not to overrun qc->sg
2926 * and fulfill length specified in the byte count register,
2927 * - for read case, discard trailing data from the device
2928 * - for write case, padding zero data to the device
2930 u16 pad_buf
[1] = { 0 };
2931 unsigned int words
= bytes
>> 1;
2934 if (words
) /* warning if bytes > 1 */
2935 printk(KERN_WARNING
"ata%u: %u bytes trailing data\n",
2938 for (i
= 0; i
< words
; i
++)
2939 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
2941 ap
->hsm_task_state
= HSM_ST_LAST
;
2945 sg
= &qc
->sg
[qc
->cursg
];
2948 offset
= sg
->offset
+ qc
->cursg_ofs
;
2950 /* get the current page and offset */
2951 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
2952 offset
%= PAGE_SIZE
;
2954 /* don't overrun current sg */
2955 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
2957 /* don't cross page boundaries */
2958 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
2960 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
2962 if (PageHighMem(page
)) {
2963 unsigned long flags
;
2965 local_irq_save(flags
);
2966 buf
= kmap_atomic(page
, KM_IRQ0
);
2968 /* do the actual data transfer */
2969 ata_data_xfer(ap
, buf
+ offset
, count
, do_write
);
2971 kunmap_atomic(buf
, KM_IRQ0
);
2972 local_irq_restore(flags
);
2974 buf
= page_address(page
);
2975 ata_data_xfer(ap
, buf
+ offset
, count
, do_write
);
2979 qc
->curbytes
+= count
;
2980 qc
->cursg_ofs
+= count
;
2982 if (qc
->cursg_ofs
== sg
->length
) {
2992 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
2993 * @qc: Command on going
2995 * Transfer Transfer data from/to the ATAPI device.
2998 * Inherited from caller.
3002 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3004 struct ata_port
*ap
= qc
->ap
;
3005 struct ata_device
*dev
= qc
->dev
;
3006 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3007 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3009 ap
->ops
->tf_read(ap
, &qc
->tf
);
3010 ireason
= qc
->tf
.nsect
;
3011 bc_lo
= qc
->tf
.lbam
;
3012 bc_hi
= qc
->tf
.lbah
;
3013 bytes
= (bc_hi
<< 8) | bc_lo
;
3015 /* shall be cleared to zero, indicating xfer of data */
3016 if (ireason
& (1 << 0))
3019 /* make sure transfer direction matches expected */
3020 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3021 if (do_write
!= i_write
)
3024 VPRINTK("ata%u: xfering %d bytes\n", ap
->id
, bytes
);
3026 __atapi_pio_bytes(qc
, bytes
);
3031 printk(KERN_INFO
"ata%u: dev %u: ATAPI check failed\n",
3032 ap
->id
, dev
->devno
);
3033 ap
->hsm_task_state
= HSM_ST_ERR
;
3041 * None. (executing in kernel thread context)
3044 static void ata_pio_block(struct ata_port
*ap
)
3046 struct ata_queued_cmd
*qc
;
3050 * This is purely hueristic. This is a fast path.
3051 * Sometimes when we enter, BSY will be cleared in
3052 * a chk-status or two. If not, the drive is probably seeking
3053 * or something. Snooze for a couple msecs, then
3054 * chk-status again. If still busy, fall back to
3055 * HSM_ST_POLL state.
3057 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
3058 if (status
& ATA_BUSY
) {
3060 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3061 if (status
& ATA_BUSY
) {
3062 ap
->hsm_task_state
= HSM_ST_POLL
;
3063 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3068 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3071 if (is_atapi_taskfile(&qc
->tf
)) {
3072 /* no more data to transfer or unsupported ATAPI command */
3073 if ((status
& ATA_DRQ
) == 0) {
3074 ap
->hsm_task_state
= HSM_ST_LAST
;
3078 atapi_pio_bytes(qc
);
3080 /* handle BSY=0, DRQ=0 as error */
3081 if ((status
& ATA_DRQ
) == 0) {
3082 ap
->hsm_task_state
= HSM_ST_ERR
;
3090 static void ata_pio_error(struct ata_port
*ap
)
3092 struct ata_queued_cmd
*qc
;
3095 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3098 drv_stat
= ata_chk_status(ap
);
3099 printk(KERN_WARNING
"ata%u: PIO error, drv_stat 0x%x\n",
3102 ap
->hsm_task_state
= HSM_ST_IDLE
;
3104 ata_poll_qc_complete(qc
, drv_stat
| ATA_ERR
);
3107 static void ata_pio_task(void *_data
)
3109 struct ata_port
*ap
= _data
;
3110 unsigned long timeout
;
3117 switch (ap
->hsm_task_state
) {
3126 qc_completed
= ata_pio_complete(ap
);
3130 case HSM_ST_LAST_POLL
:
3131 timeout
= ata_pio_poll(ap
);
3141 queue_delayed_work(ata_wq
, &ap
->pio_task
, timeout
);
3142 else if (!qc_completed
)
3147 * ata_qc_timeout - Handle timeout of queued command
3148 * @qc: Command that timed out
3150 * Some part of the kernel (currently, only the SCSI layer)
3151 * has noticed that the active command on port @ap has not
3152 * completed after a specified length of time. Handle this
3153 * condition by disabling DMA (if necessary) and completing
3154 * transactions, with error if necessary.
3156 * This also handles the case of the "lost interrupt", where
3157 * for some reason (possibly hardware bug, possibly driver bug)
3158 * an interrupt was not delivered to the driver, even though the
3159 * transaction completed successfully.
3162 * Inherited from SCSI layer (none, can sleep)
3165 static void ata_qc_timeout(struct ata_queued_cmd
*qc
)
3167 struct ata_port
*ap
= qc
->ap
;
3168 struct ata_host_set
*host_set
= ap
->host_set
;
3169 struct ata_device
*dev
= qc
->dev
;
3170 u8 host_stat
= 0, drv_stat
;
3171 unsigned long flags
;
3175 /* FIXME: doesn't this conflict with timeout handling? */
3176 if (qc
->dev
->class == ATA_DEV_ATAPI
&& qc
->scsicmd
) {
3177 struct scsi_cmnd
*cmd
= qc
->scsicmd
;
3179 if (!(cmd
->eh_eflags
& SCSI_EH_CANCEL_CMD
)) {
3181 /* finish completing original command */
3182 spin_lock_irqsave(&host_set
->lock
, flags
);
3183 __ata_qc_complete(qc
);
3184 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3186 atapi_request_sense(ap
, dev
, cmd
);
3188 cmd
->result
= (CHECK_CONDITION
<< 1) | (DID_OK
<< 16);
3189 scsi_finish_command(cmd
);
3195 spin_lock_irqsave(&host_set
->lock
, flags
);
3197 /* hack alert! We cannot use the supplied completion
3198 * function from inside the ->eh_strategy_handler() thread.
3199 * libata is the only user of ->eh_strategy_handler() in
3200 * any kernel, so the default scsi_done() assumes it is
3201 * not being called from the SCSI EH.
3203 qc
->scsidone
= scsi_finish_command
;
3205 switch (qc
->tf
.protocol
) {
3208 case ATA_PROT_ATAPI_DMA
:
3209 host_stat
= ap
->ops
->bmdma_status(ap
);
3211 /* before we do anything else, clear DMA-Start bit */
3212 ap
->ops
->bmdma_stop(qc
);
3218 drv_stat
= ata_chk_status(ap
);
3220 /* ack bmdma irq events */
3221 ap
->ops
->irq_clear(ap
);
3223 printk(KERN_ERR
"ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3224 ap
->id
, qc
->tf
.command
, drv_stat
, host_stat
);
3226 ap
->hsm_task_state
= HSM_ST_IDLE
;
3228 /* complete taskfile transaction */
3229 ata_qc_complete(qc
, drv_stat
);
3233 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3240 * ata_eng_timeout - Handle timeout of queued command
3241 * @ap: Port on which timed-out command is active
3243 * Some part of the kernel (currently, only the SCSI layer)
3244 * has noticed that the active command on port @ap has not
3245 * completed after a specified length of time. Handle this
3246 * condition by disabling DMA (if necessary) and completing
3247 * transactions, with error if necessary.
3249 * This also handles the case of the "lost interrupt", where
3250 * for some reason (possibly hardware bug, possibly driver bug)
3251 * an interrupt was not delivered to the driver, even though the
3252 * transaction completed successfully.
3255 * Inherited from SCSI layer (none, can sleep)
3258 void ata_eng_timeout(struct ata_port
*ap
)
3260 struct ata_queued_cmd
*qc
;
3264 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3268 printk(KERN_ERR
"ata%u: BUG: timeout without command\n",
3278 * ata_qc_new - Request an available ATA command, for queueing
3279 * @ap: Port associated with device @dev
3280 * @dev: Device from whom we request an available command structure
3286 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
3288 struct ata_queued_cmd
*qc
= NULL
;
3291 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++)
3292 if (!test_and_set_bit(i
, &ap
->qactive
)) {
3293 qc
= ata_qc_from_tag(ap
, i
);
3304 * ata_qc_new_init - Request an available ATA command, and initialize it
3305 * @ap: Port associated with device @dev
3306 * @dev: Device from whom we request an available command structure
3312 struct ata_queued_cmd
*ata_qc_new_init(struct ata_port
*ap
,
3313 struct ata_device
*dev
)
3315 struct ata_queued_cmd
*qc
;
3317 qc
= ata_qc_new(ap
);
3324 qc
->cursect
= qc
->cursg
= qc
->cursg_ofs
= 0;
3326 qc
->nbytes
= qc
->curbytes
= 0;
3328 ata_tf_init(ap
, &qc
->tf
, dev
->devno
);
3330 if (dev
->flags
& ATA_DFLAG_LBA
) {
3331 qc
->tf
.flags
|= ATA_TFLAG_LBA
;
3333 if (dev
->flags
& ATA_DFLAG_LBA48
)
3334 qc
->tf
.flags
|= ATA_TFLAG_LBA48
;
3341 int ata_qc_complete_noop(struct ata_queued_cmd
*qc
, u8 drv_stat
)
3346 static void __ata_qc_complete(struct ata_queued_cmd
*qc
)
3348 struct ata_port
*ap
= qc
->ap
;
3349 unsigned int tag
, do_clear
= 0;
3353 if (likely(ata_tag_valid(tag
))) {
3354 if (tag
== ap
->active_tag
)
3355 ap
->active_tag
= ATA_TAG_POISON
;
3356 qc
->tag
= ATA_TAG_POISON
;
3361 struct completion
*waiting
= qc
->waiting
;
3366 if (likely(do_clear
))
3367 clear_bit(tag
, &ap
->qactive
);
3371 * ata_qc_free - free unused ata_queued_cmd
3372 * @qc: Command to complete
3374 * Designed to free unused ata_queued_cmd object
3375 * in case something prevents using it.
3378 * spin_lock_irqsave(host_set lock)
3381 void ata_qc_free(struct ata_queued_cmd
*qc
)
3383 assert(qc
!= NULL
); /* ata_qc_from_tag _might_ return NULL */
3384 assert(qc
->waiting
== NULL
); /* nothing should be waiting */
3386 __ata_qc_complete(qc
);
3390 * ata_qc_complete - Complete an active ATA command
3391 * @qc: Command to complete
3392 * @drv_stat: ATA Status register contents
3394 * Indicate to the mid and upper layers that an ATA
3395 * command has completed, with either an ok or not-ok status.
3398 * spin_lock_irqsave(host_set lock)
3402 void ata_qc_complete(struct ata_queued_cmd
*qc
, u8 drv_stat
)
3406 assert(qc
!= NULL
); /* ata_qc_from_tag _might_ return NULL */
3407 assert(qc
->flags
& ATA_QCFLAG_ACTIVE
);
3409 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3412 /* atapi: mark qc as inactive to prevent the interrupt handler
3413 * from completing the command twice later, before the error handler
3414 * is called. (when rc != 0 and atapi request sense is needed)
3416 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
3418 /* call completion callback */
3419 rc
= qc
->complete_fn(qc
, drv_stat
);
3421 /* if callback indicates not to complete command (non-zero),
3422 * return immediately
3427 __ata_qc_complete(qc
);
3432 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
3434 struct ata_port
*ap
= qc
->ap
;
3436 switch (qc
->tf
.protocol
) {
3438 case ATA_PROT_ATAPI_DMA
:
3441 case ATA_PROT_ATAPI
:
3443 case ATA_PROT_PIO_MULT
:
3444 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
3457 * ata_qc_issue - issue taskfile to device
3458 * @qc: command to issue to device
3460 * Prepare an ATA command to submission to device.
3461 * This includes mapping the data into a DMA-able
3462 * area, filling in the S/G table, and finally
3463 * writing the taskfile to hardware, starting the command.
3466 * spin_lock_irqsave(host_set lock)
3469 * Zero on success, negative on error.
3472 int ata_qc_issue(struct ata_queued_cmd
*qc
)
3474 struct ata_port
*ap
= qc
->ap
;
3476 if (ata_should_dma_map(qc
)) {
3477 if (qc
->flags
& ATA_QCFLAG_SG
) {
3478 if (ata_sg_setup(qc
))
3480 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
3481 if (ata_sg_setup_one(qc
))
3485 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3488 ap
->ops
->qc_prep(qc
);
3490 qc
->ap
->active_tag
= qc
->tag
;
3491 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
3493 return ap
->ops
->qc_issue(qc
);
3501 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
3502 * @qc: command to issue to device
3504 * Using various libata functions and hooks, this function
3505 * starts an ATA command. ATA commands are grouped into
3506 * classes called "protocols", and issuing each type of protocol
3507 * is slightly different.
3509 * May be used as the qc_issue() entry in ata_port_operations.
3512 * spin_lock_irqsave(host_set lock)
3515 * Zero on success, negative on error.
3518 int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
3520 struct ata_port
*ap
= qc
->ap
;
3522 /* Use polling pio if the LLD doesn't handle
3523 * interrupt driven pio and atapi CDB interrupt.
3525 if (ap
->flags
& ATA_FLAG_PIO_POLLING
) {
3526 switch (qc
->tf
.protocol
) {
3528 case ATA_PROT_ATAPI
:
3529 case ATA_PROT_ATAPI_NODATA
:
3530 qc
->tf
.flags
|= ATA_TFLAG_POLLING
;
3532 case ATA_PROT_ATAPI_DMA
:
3533 if (qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)
3541 /* select the device */
3542 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
3544 /* start the command */
3545 switch (qc
->tf
.protocol
) {
3546 case ATA_PROT_NODATA
:
3547 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
3548 ata_qc_set_polling(qc
);
3550 ata_tf_to_host_nolock(ap
, &qc
->tf
);
3551 ap
->hsm_task_state
= HSM_ST_LAST
;
3553 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
3554 queue_work(ata_wq
, &ap
->pio_task
);
3559 assert(!(qc
->tf
.flags
& ATA_TFLAG_POLLING
));
3561 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
3562 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
3563 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
3564 ap
->hsm_task_state
= HSM_ST_LAST
;
3568 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
3569 ata_qc_set_polling(qc
);
3571 ata_tf_to_host_nolock(ap
, &qc
->tf
);
3573 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
3574 /* PIO data out protocol */
3575 ap
->hsm_task_state
= HSM_ST_FIRST
;
3576 queue_work(ata_wq
, &ap
->dataout_task
);
3578 /* always send first data block using
3579 * the ata_dataout_task() codepath.
3582 /* PIO data in protocol */
3583 ap
->hsm_task_state
= HSM_ST
;
3585 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
3586 queue_work(ata_wq
, &ap
->pio_task
);
3588 /* if polling, ata_pio_task() handles the rest.
3589 * otherwise, interrupt handler takes over from here.
3595 case ATA_PROT_ATAPI
:
3596 case ATA_PROT_ATAPI_NODATA
:
3597 if (qc
->tf
.flags
& ATA_TFLAG_POLLING
)
3598 ata_qc_set_polling(qc
);
3600 ata_tf_to_host_nolock(ap
, &qc
->tf
);
3601 ap
->hsm_task_state
= HSM_ST_FIRST
;
3603 /* send cdb by polling if no cdb interrupt */
3604 if ((!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
)) ||
3605 (qc
->tf
.flags
& ATA_TFLAG_POLLING
))
3606 queue_work(ata_wq
, &ap
->dataout_task
);
3609 case ATA_PROT_ATAPI_DMA
:
3610 assert(!(qc
->tf
.flags
& ATA_TFLAG_POLLING
));
3612 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
3613 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
3614 ap
->hsm_task_state
= HSM_ST_FIRST
;
3616 /* send cdb by polling if no cdb interrupt */
3617 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
3618 queue_work(ata_wq
, &ap
->dataout_task
);
3630 * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
3631 * @qc: Info associated with this ATA transaction.
3634 * spin_lock_irqsave(host_set lock)
3637 static void ata_bmdma_setup_mmio (struct ata_queued_cmd
*qc
)
3639 struct ata_port
*ap
= qc
->ap
;
3640 unsigned int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3642 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3644 /* load PRD table addr. */
3645 mb(); /* make sure PRD table writes are visible to controller */
3646 writel(ap
->prd_dma
, mmio
+ ATA_DMA_TABLE_OFS
);
3648 /* specify data direction, triple-check start bit is clear */
3649 dmactl
= readb(mmio
+ ATA_DMA_CMD
);
3650 dmactl
&= ~(ATA_DMA_WR
| ATA_DMA_START
);
3652 dmactl
|= ATA_DMA_WR
;
3653 writeb(dmactl
, mmio
+ ATA_DMA_CMD
);
3655 /* issue r/w command */
3656 ap
->ops
->exec_command(ap
, &qc
->tf
);
3660 * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
3661 * @qc: Info associated with this ATA transaction.
3664 * spin_lock_irqsave(host_set lock)
3667 static void ata_bmdma_start_mmio (struct ata_queued_cmd
*qc
)
3669 struct ata_port
*ap
= qc
->ap
;
3670 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3673 /* start host DMA transaction */
3674 dmactl
= readb(mmio
+ ATA_DMA_CMD
);
3675 writeb(dmactl
| ATA_DMA_START
, mmio
+ ATA_DMA_CMD
);
3677 /* Strictly, one may wish to issue a readb() here, to
3678 * flush the mmio write. However, control also passes
3679 * to the hardware at this point, and it will interrupt
3680 * us when we are to resume control. So, in effect,
3681 * we don't care when the mmio write flushes.
3682 * Further, a read of the DMA status register _immediately_
3683 * following the write may not be what certain flaky hardware
3684 * is expected, so I think it is best to not add a readb()
3685 * without first all the MMIO ATA cards/mobos.
3686 * Or maybe I'm just being paranoid.
3691 * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO)
3692 * @qc: Info associated with this ATA transaction.
3695 * spin_lock_irqsave(host_set lock)
3698 static void ata_bmdma_setup_pio (struct ata_queued_cmd
*qc
)
3700 struct ata_port
*ap
= qc
->ap
;
3701 unsigned int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3704 /* load PRD table addr. */
3705 outl(ap
->prd_dma
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_TABLE_OFS
);
3707 /* specify data direction, triple-check start bit is clear */
3708 dmactl
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3709 dmactl
&= ~(ATA_DMA_WR
| ATA_DMA_START
);
3711 dmactl
|= ATA_DMA_WR
;
3712 outb(dmactl
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3714 /* issue r/w command */
3715 ap
->ops
->exec_command(ap
, &qc
->tf
);
3719 * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO)
3720 * @qc: Info associated with this ATA transaction.
3723 * spin_lock_irqsave(host_set lock)
3726 static void ata_bmdma_start_pio (struct ata_queued_cmd
*qc
)
3728 struct ata_port
*ap
= qc
->ap
;
3731 /* start host DMA transaction */
3732 dmactl
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3733 outb(dmactl
| ATA_DMA_START
,
3734 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3739 * ata_bmdma_start - Start a PCI IDE BMDMA transaction
3740 * @qc: Info associated with this ATA transaction.
3742 * Writes the ATA_DMA_START flag to the DMA command register.
3744 * May be used as the bmdma_start() entry in ata_port_operations.
3747 * spin_lock_irqsave(host_set lock)
3749 void ata_bmdma_start(struct ata_queued_cmd
*qc
)
3751 if (qc
->ap
->flags
& ATA_FLAG_MMIO
)
3752 ata_bmdma_start_mmio(qc
);
3754 ata_bmdma_start_pio(qc
);
3759 * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
3760 * @qc: Info associated with this ATA transaction.
3762 * Writes address of PRD table to device's PRD Table Address
3763 * register, sets the DMA control register, and calls
3764 * ops->exec_command() to start the transfer.
3766 * May be used as the bmdma_setup() entry in ata_port_operations.
3769 * spin_lock_irqsave(host_set lock)
3771 void ata_bmdma_setup(struct ata_queued_cmd
*qc
)
3773 if (qc
->ap
->flags
& ATA_FLAG_MMIO
)
3774 ata_bmdma_setup_mmio(qc
);
3776 ata_bmdma_setup_pio(qc
);
3781 * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
3782 * @ap: Port associated with this ATA transaction.
3784 * Clear interrupt and error flags in DMA status register.
3786 * May be used as the irq_clear() entry in ata_port_operations.
3789 * spin_lock_irqsave(host_set lock)
3792 void ata_bmdma_irq_clear(struct ata_port
*ap
)
3794 if (ap
->flags
& ATA_FLAG_MMIO
) {
3795 void __iomem
*mmio
= ((void __iomem
*) ap
->ioaddr
.bmdma_addr
) + ATA_DMA_STATUS
;
3796 writeb(readb(mmio
), mmio
);
3798 unsigned long addr
= ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
;
3799 outb(inb(addr
), addr
);
3806 * ata_bmdma_status - Read PCI IDE BMDMA status
3807 * @ap: Port associated with this ATA transaction.
3809 * Read and return BMDMA status register.
3811 * May be used as the bmdma_status() entry in ata_port_operations.
3814 * spin_lock_irqsave(host_set lock)
3817 u8
ata_bmdma_status(struct ata_port
*ap
)
3820 if (ap
->flags
& ATA_FLAG_MMIO
) {
3821 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3822 host_stat
= readb(mmio
+ ATA_DMA_STATUS
);
3824 host_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
3830 * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
3831 * @qc: Command we are ending DMA for
3833 * Clears the ATA_DMA_START flag in the dma control register
3835 * May be used as the bmdma_stop() entry in ata_port_operations.
3838 * spin_lock_irqsave(host_set lock)
3841 void ata_bmdma_stop(struct ata_queued_cmd
*qc
)
3843 struct ata_port
*ap
= qc
->ap
;
3844 if (ap
->flags
& ATA_FLAG_MMIO
) {
3845 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3847 /* clear start/stop bit */
3848 writeb(readb(mmio
+ ATA_DMA_CMD
) & ~ATA_DMA_START
,
3849 mmio
+ ATA_DMA_CMD
);
3851 /* clear start/stop bit */
3852 outb(inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
) & ~ATA_DMA_START
,
3853 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3856 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
3857 ata_altstatus(ap
); /* dummy read */
3861 * ata_host_intr - Handle host interrupt for given (port, task)
3862 * @ap: Port on which interrupt arrived (possibly...)
3863 * @qc: Taskfile currently active in engine
3865 * Handle host interrupt for given queued command. Currently,
3866 * only DMA interrupts are handled. All other commands are
3867 * handled via polling with interrupts disabled (nIEN bit).
3870 * spin_lock_irqsave(host_set lock)
3873 * One if interrupt was handled, zero if not (shared irq).
3876 inline unsigned int ata_host_intr (struct ata_port
*ap
,
3877 struct ata_queued_cmd
*qc
)
3879 u8 status
, host_stat
= 0;
3881 VPRINTK("ata%u: protocol %d task_state %d\n",
3882 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
);
3884 /* Check whether we are expecting interrupt in this state */
3885 switch (ap
->hsm_task_state
) {
3887 /* Check the ATA_DFLAG_CDB_INTR flag is enough here.
3888 * The flag was turned on only for atapi devices.
3889 * No need to check is_atapi_taskfile(&qc->tf) again.
3891 if (!(qc
->dev
->flags
& ATA_DFLAG_CDB_INTR
))
3895 if (qc
->tf
.protocol
== ATA_PROT_DMA
||
3896 qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
) {
3897 /* check status of DMA engine */
3898 host_stat
= ap
->ops
->bmdma_status(ap
);
3899 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
3901 /* if it's not our irq... */
3902 if (!(host_stat
& ATA_DMA_INTR
))
3905 /* before we do anything else, clear DMA-Start bit */
3906 ap
->ops
->bmdma_stop(qc
);
3915 /* check altstatus */
3916 status
= ata_altstatus(ap
);
3917 if (status
& ATA_BUSY
)
3920 /* check main status, clearing INTRQ */
3921 status
= ata_chk_status(ap
);
3922 if (unlikely(status
& ATA_BUSY
))
3925 DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n",
3926 ap
->id
, qc
->tf
.protocol
, ap
->hsm_task_state
, status
);
3928 /* ack bmdma irq events */
3929 ap
->ops
->irq_clear(ap
);
3932 if (unlikely((status
& ATA_ERR
) || (host_stat
& ATA_DMA_ERR
)))
3933 ap
->hsm_task_state
= HSM_ST_ERR
;
3936 switch (ap
->hsm_task_state
) {
3938 /* Some pre-ATAPI-4 devices assert INTRQ
3939 * at this state when ready to receive CDB.
3942 /* check device status */
3943 if (unlikely((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
)) {
3944 /* Wrong status. Let EH handle this */
3945 ap
->hsm_task_state
= HSM_ST_ERR
;
3949 atapi_send_cdb(ap
, qc
);
3954 /* complete command or read/write the data register */
3955 if (qc
->tf
.protocol
== ATA_PROT_ATAPI
) {
3956 /* ATAPI PIO protocol */
3957 if ((status
& ATA_DRQ
) == 0) {
3958 /* no more data to transfer */
3959 ap
->hsm_task_state
= HSM_ST_LAST
;
3963 atapi_pio_bytes(qc
);
3965 if (unlikely(ap
->hsm_task_state
== HSM_ST_ERR
))
3966 /* bad ireason reported by device */
3970 /* ATA PIO protocol */
3971 if (unlikely((status
& ATA_DRQ
) == 0)) {
3972 /* handle BSY=0, DRQ=0 as error */
3973 ap
->hsm_task_state
= HSM_ST_ERR
;
3979 if (ap
->hsm_task_state
== HSM_ST_LAST
&&
3980 (!(qc
->tf
.flags
& ATA_TFLAG_WRITE
))) {
3983 status
= ata_chk_status(ap
);
3988 ata_altstatus(ap
); /* flush */
3992 if (unlikely(status
& ATA_DRQ
)) {
3993 /* handle DRQ=1 as error */
3994 ap
->hsm_task_state
= HSM_ST_ERR
;
3998 /* no more data to transfer */
3999 DPRINTK("ata%u: command complete, drv_stat 0x%x\n",
4002 ap
->hsm_task_state
= HSM_ST_IDLE
;
4004 /* complete taskfile transaction */
4005 ata_qc_complete(qc
, status
);
4009 printk(KERN_ERR
"ata%u: command error, drv_stat 0x%x host_stat 0x%x\n",
4010 ap
->id
, status
, host_stat
);
4012 ap
->hsm_task_state
= HSM_ST_IDLE
;
4013 ata_qc_complete(qc
, status
| ATA_ERR
);
4019 return 1; /* irq handled */
4022 ap
->stats
.idle_irq
++;
4025 if ((ap
->stats
.idle_irq
% 1000) == 0) {
4027 ata_irq_ack(ap
, 0); /* debug trap */
4028 printk(KERN_WARNING
"ata%d: irq trap\n", ap
->id
);
4031 return 0; /* irq not handled */
4035 * ata_interrupt - Default ATA host interrupt handler
4036 * @irq: irq line (unused)
4037 * @dev_instance: pointer to our ata_host_set information structure
4040 * Default interrupt handler for PCI IDE devices. Calls
4041 * ata_host_intr() for each port that is not disabled.
4044 * Obtains host_set lock during operation.
4047 * IRQ_NONE or IRQ_HANDLED.
4051 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
4053 struct ata_host_set
*host_set
= dev_instance
;
4055 unsigned int handled
= 0;
4056 unsigned long flags
;
4058 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4059 spin_lock_irqsave(&host_set
->lock
, flags
);
4061 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4062 struct ata_port
*ap
;
4064 ap
= host_set
->ports
[i
];
4066 !(ap
->flags
& ATA_FLAG_PORT_DISABLED
)) {
4067 struct ata_queued_cmd
*qc
;
4069 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4070 if (qc
&& (!(qc
->tf
.flags
& ATA_TFLAG_POLLING
)) &&
4071 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
4072 handled
|= ata_host_intr(ap
, qc
);
4076 spin_unlock_irqrestore(&host_set
->lock
, flags
);
4078 return IRQ_RETVAL(handled
);
4082 * ata_port_start - Set port up for dma.
4083 * @ap: Port to initialize
4085 * Called just after data structures for each port are
4086 * initialized. Allocates space for PRD table.
4088 * May be used as the port_start() entry in ata_port_operations.
4093 int ata_port_start (struct ata_port
*ap
)
4095 struct device
*dev
= ap
->host_set
->dev
;
4097 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
4101 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
4108 * ata_port_stop - Undo ata_port_start()
4109 * @ap: Port to shut down
4111 * Frees the PRD table.
4113 * May be used as the port_stop() entry in ata_port_operations.
4118 void ata_port_stop (struct ata_port
*ap
)
4120 struct device
*dev
= ap
->host_set
->dev
;
4122 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4125 void ata_host_stop (struct ata_host_set
*host_set
)
4127 if (host_set
->mmio_base
)
4128 iounmap(host_set
->mmio_base
);
4133 * ata_host_remove - Unregister SCSI host structure with upper layers
4134 * @ap: Port to unregister
4135 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4140 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
4142 struct Scsi_Host
*sh
= ap
->host
;
4147 scsi_remove_host(sh
);
4149 ap
->ops
->port_stop(ap
);
4153 * ata_host_init - Initialize an ata_port structure
4154 * @ap: Structure to initialize
4155 * @host: associated SCSI mid-layer structure
4156 * @host_set: Collection of hosts to which @ap belongs
4157 * @ent: Probe information provided by low-level driver
4158 * @port_no: Port number associated with this ata_port
4160 * Initialize a new ata_port structure, and its associated
4164 * Inherited from caller.
4168 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
4169 struct ata_host_set
*host_set
,
4170 struct ata_probe_ent
*ent
, unsigned int port_no
)
4176 host
->max_channel
= 1;
4177 host
->unique_id
= ata_unique_id
++;
4178 host
->max_cmd_len
= 12;
4180 scsi_assign_lock(host
, &host_set
->lock
);
4182 ap
->flags
= ATA_FLAG_PORT_DISABLED
;
4183 ap
->id
= host
->unique_id
;
4185 ap
->ctl
= ATA_DEVCTL_OBS
;
4186 ap
->host_set
= host_set
;
4187 ap
->port_no
= port_no
;
4189 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
4190 ap
->pio_mask
= ent
->pio_mask
;
4191 ap
->mwdma_mask
= ent
->mwdma_mask
;
4192 ap
->udma_mask
= ent
->udma_mask
;
4193 ap
->flags
|= ent
->host_flags
;
4194 ap
->ops
= ent
->port_ops
;
4195 ap
->cbl
= ATA_CBL_NONE
;
4196 ap
->active_tag
= ATA_TAG_POISON
;
4197 ap
->last_ctl
= 0xFF;
4199 INIT_WORK(&ap
->dataout_task
, ata_dataout_task
, ap
);
4200 INIT_WORK(&ap
->pio_task
, ata_pio_task
, ap
);
4202 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4203 ap
->device
[i
].devno
= i
;
4206 ap
->stats
.unhandled_irq
= 1;
4207 ap
->stats
.idle_irq
= 1;
4210 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
4214 * ata_host_add - Attach low-level ATA driver to system
4215 * @ent: Information provided by low-level driver
4216 * @host_set: Collections of ports to which we add
4217 * @port_no: Port number associated with this host
4219 * Attach low-level ATA driver to system.
4222 * PCI/etc. bus probe sem.
4225 * New ata_port on success, for NULL on error.
4229 static struct ata_port
* ata_host_add(struct ata_probe_ent
*ent
,
4230 struct ata_host_set
*host_set
,
4231 unsigned int port_no
)
4233 struct Scsi_Host
*host
;
4234 struct ata_port
*ap
;
4238 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
4242 ap
= (struct ata_port
*) &host
->hostdata
[0];
4244 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
4246 rc
= ap
->ops
->port_start(ap
);
4253 scsi_host_put(host
);
4258 * ata_device_add - Register hardware device with ATA and SCSI layers
4259 * @ent: Probe information describing hardware device to be registered
4261 * This function processes the information provided in the probe
4262 * information struct @ent, allocates the necessary ATA and SCSI
4263 * host information structures, initializes them, and registers
4264 * everything with requisite kernel subsystems.
4266 * This function requests irqs, probes the ATA bus, and probes
4270 * PCI/etc. bus probe sem.
4273 * Number of ports registered. Zero on error (no ports registered).
4277 int ata_device_add(struct ata_probe_ent
*ent
)
4279 unsigned int count
= 0, i
;
4280 struct device
*dev
= ent
->dev
;
4281 struct ata_host_set
*host_set
;
4284 /* alloc a container for our list of ATA ports (buses) */
4285 host_set
= kmalloc(sizeof(struct ata_host_set
) +
4286 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
4289 memset(host_set
, 0, sizeof(struct ata_host_set
) + (ent
->n_ports
* sizeof(void *)));
4290 spin_lock_init(&host_set
->lock
);
4292 host_set
->dev
= dev
;
4293 host_set
->n_ports
= ent
->n_ports
;
4294 host_set
->irq
= ent
->irq
;
4295 host_set
->mmio_base
= ent
->mmio_base
;
4296 host_set
->private_data
= ent
->private_data
;
4297 host_set
->ops
= ent
->port_ops
;
4299 /* register each port bound to this device */
4300 for (i
= 0; i
< ent
->n_ports
; i
++) {
4301 struct ata_port
*ap
;
4302 unsigned long xfer_mode_mask
;
4304 ap
= ata_host_add(ent
, host_set
, i
);
4308 host_set
->ports
[i
] = ap
;
4309 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
4310 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
4311 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
4313 /* print per-port info to dmesg */
4314 printk(KERN_INFO
"ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4315 "bmdma 0x%lX irq %lu\n",
4317 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
4318 ata_mode_string(xfer_mode_mask
),
4319 ap
->ioaddr
.cmd_addr
,
4320 ap
->ioaddr
.ctl_addr
,
4321 ap
->ioaddr
.bmdma_addr
,
4325 host_set
->ops
->irq_clear(ap
);
4334 /* obtain irq, that is shared between channels */
4335 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
4336 DRV_NAME
, host_set
))
4339 /* perform each probe synchronously */
4340 DPRINTK("probe begin\n");
4341 for (i
= 0; i
< count
; i
++) {
4342 struct ata_port
*ap
;
4345 ap
= host_set
->ports
[i
];
4347 DPRINTK("ata%u: probe begin\n", ap
->id
);
4348 rc
= ata_bus_probe(ap
);
4349 DPRINTK("ata%u: probe end\n", ap
->id
);
4352 /* FIXME: do something useful here?
4353 * Current libata behavior will
4354 * tear down everything when
4355 * the module is removed
4356 * or the h/w is unplugged.
4360 rc
= scsi_add_host(ap
->host
, dev
);
4362 printk(KERN_ERR
"ata%u: scsi_add_host failed\n",
4364 /* FIXME: do something useful here */
4365 /* FIXME: handle unconditional calls to
4366 * scsi_scan_host and ata_host_remove, below,
4372 /* probes are done, now scan each port's disk(s) */
4373 DPRINTK("probe begin\n");
4374 for (i
= 0; i
< count
; i
++) {
4375 struct ata_port
*ap
= host_set
->ports
[i
];
4377 ata_scsi_scan_host(ap
);
4380 dev_set_drvdata(dev
, host_set
);
4382 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
4383 return ent
->n_ports
; /* success */
4386 for (i
= 0; i
< count
; i
++) {
4387 ata_host_remove(host_set
->ports
[i
], 1);
4388 scsi_host_put(host_set
->ports
[i
]->host
);
4391 VPRINTK("EXIT, returning 0\n");
4396 * ata_host_set_remove - PCI layer callback for device removal
4397 * @host_set: ATA host set that was removed
4399 * Unregister all objects associated with this host set. Free those
4403 * Inherited from calling layer (may sleep).
4407 void ata_host_set_remove(struct ata_host_set
*host_set
)
4409 struct ata_port
*ap
;
4412 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4413 ap
= host_set
->ports
[i
];
4414 scsi_remove_host(ap
->host
);
4417 free_irq(host_set
->irq
, host_set
);
4419 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4420 ap
= host_set
->ports
[i
];
4422 ata_scsi_release(ap
->host
);
4424 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
4425 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
4427 if (ioaddr
->cmd_addr
== 0x1f0)
4428 release_region(0x1f0, 8);
4429 else if (ioaddr
->cmd_addr
== 0x170)
4430 release_region(0x170, 8);
4433 scsi_host_put(ap
->host
);
4436 if (host_set
->ops
->host_stop
)
4437 host_set
->ops
->host_stop(host_set
);
4443 * ata_scsi_release - SCSI layer callback hook for host unload
4444 * @host: libata host to be unloaded
4446 * Performs all duties necessary to shut down a libata port...
4447 * Kill port kthread, disable port, and release resources.
4450 * Inherited from SCSI layer.
4456 int ata_scsi_release(struct Scsi_Host
*host
)
4458 struct ata_port
*ap
= (struct ata_port
*) &host
->hostdata
[0];
4462 ap
->ops
->port_disable(ap
);
4463 ata_host_remove(ap
, 0);
4470 * ata_std_ports - initialize ioaddr with standard port offsets.
4471 * @ioaddr: IO address structure to be initialized
4473 * Utility function which initializes data_addr, error_addr,
4474 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4475 * device_addr, status_addr, and command_addr to standard offsets
4476 * relative to cmd_addr.
4478 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
4481 void ata_std_ports(struct ata_ioports
*ioaddr
)
4483 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
4484 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
4485 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
4486 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
4487 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
4488 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
4489 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
4490 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
4491 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
4492 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
4495 static struct ata_probe_ent
*
4496 ata_probe_ent_alloc(struct device
*dev
, struct ata_port_info
*port
)
4498 struct ata_probe_ent
*probe_ent
;
4500 probe_ent
= kmalloc(sizeof(*probe_ent
), GFP_KERNEL
);
4502 printk(KERN_ERR DRV_NAME
"(%s): out of memory\n",
4503 kobject_name(&(dev
->kobj
)));
4507 memset(probe_ent
, 0, sizeof(*probe_ent
));
4509 INIT_LIST_HEAD(&probe_ent
->node
);
4510 probe_ent
->dev
= dev
;
4512 probe_ent
->sht
= port
->sht
;
4513 probe_ent
->host_flags
= port
->host_flags
;
4514 probe_ent
->pio_mask
= port
->pio_mask
;
4515 probe_ent
->mwdma_mask
= port
->mwdma_mask
;
4516 probe_ent
->udma_mask
= port
->udma_mask
;
4517 probe_ent
->port_ops
= port
->port_ops
;
4526 void ata_pci_host_stop (struct ata_host_set
*host_set
)
4528 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
4530 pci_iounmap(pdev
, host_set
->mmio_base
);
4534 * ata_pci_init_native_mode - Initialize native-mode driver
4535 * @pdev: pci device to be initialized
4536 * @port: array[2] of pointers to port info structures.
4537 * @ports: bitmap of ports present
4539 * Utility function which allocates and initializes an
4540 * ata_probe_ent structure for a standard dual-port
4541 * PIO-based IDE controller. The returned ata_probe_ent
4542 * structure can be passed to ata_device_add(). The returned
4543 * ata_probe_ent structure should then be freed with kfree().
4545 * The caller need only pass the address of the primary port, the
4546 * secondary will be deduced automatically. If the device has non
4547 * standard secondary port mappings this function can be called twice,
4548 * once for each interface.
4551 struct ata_probe_ent
*
4552 ata_pci_init_native_mode(struct pci_dev
*pdev
, struct ata_port_info
**port
, int ports
)
4554 struct ata_probe_ent
*probe_ent
=
4555 ata_probe_ent_alloc(pci_dev_to_dev(pdev
), port
[0]);
4561 probe_ent
->irq
= pdev
->irq
;
4562 probe_ent
->irq_flags
= SA_SHIRQ
;
4564 if (ports
& ATA_PORT_PRIMARY
) {
4565 probe_ent
->port
[p
].cmd_addr
= pci_resource_start(pdev
, 0);
4566 probe_ent
->port
[p
].altstatus_addr
=
4567 probe_ent
->port
[p
].ctl_addr
=
4568 pci_resource_start(pdev
, 1) | ATA_PCI_CTL_OFS
;
4569 probe_ent
->port
[p
].bmdma_addr
= pci_resource_start(pdev
, 4);
4570 ata_std_ports(&probe_ent
->port
[p
]);
4574 if (ports
& ATA_PORT_SECONDARY
) {
4575 probe_ent
->port
[p
].cmd_addr
= pci_resource_start(pdev
, 2);
4576 probe_ent
->port
[p
].altstatus_addr
=
4577 probe_ent
->port
[p
].ctl_addr
=
4578 pci_resource_start(pdev
, 3) | ATA_PCI_CTL_OFS
;
4579 probe_ent
->port
[p
].bmdma_addr
= pci_resource_start(pdev
, 4) + 8;
4580 ata_std_ports(&probe_ent
->port
[p
]);
4584 probe_ent
->n_ports
= p
;
4588 static struct ata_probe_ent
*ata_pci_init_legacy_port(struct pci_dev
*pdev
, struct ata_port_info
**port
, int port_num
)
4590 struct ata_probe_ent
*probe_ent
;
4592 probe_ent
= ata_probe_ent_alloc(pci_dev_to_dev(pdev
), port
[0]);
4597 probe_ent
->legacy_mode
= 1;
4598 probe_ent
->n_ports
= 1;
4599 probe_ent
->hard_port_no
= port_num
;
4604 probe_ent
->irq
= 14;
4605 probe_ent
->port
[0].cmd_addr
= 0x1f0;
4606 probe_ent
->port
[0].altstatus_addr
=
4607 probe_ent
->port
[0].ctl_addr
= 0x3f6;
4610 probe_ent
->irq
= 15;
4611 probe_ent
->port
[0].cmd_addr
= 0x170;
4612 probe_ent
->port
[0].altstatus_addr
=
4613 probe_ent
->port
[0].ctl_addr
= 0x376;
4616 probe_ent
->port
[0].bmdma_addr
= pci_resource_start(pdev
, 4) + 8 * port_num
;
4617 ata_std_ports(&probe_ent
->port
[0]);
4622 * ata_pci_init_one - Initialize/register PCI IDE host controller
4623 * @pdev: Controller to be initialized
4624 * @port_info: Information from low-level host driver
4625 * @n_ports: Number of ports attached to host controller
4627 * This is a helper function which can be called from a driver's
4628 * xxx_init_one() probe function if the hardware uses traditional
4629 * IDE taskfile registers.
4631 * This function calls pci_enable_device(), reserves its register
4632 * regions, sets the dma mask, enables bus master mode, and calls
4636 * Inherited from PCI layer (may sleep).
4639 * Zero on success, negative on errno-based value on error.
4643 int ata_pci_init_one (struct pci_dev
*pdev
, struct ata_port_info
**port_info
,
4644 unsigned int n_ports
)
4646 struct ata_probe_ent
*probe_ent
= NULL
, *probe_ent2
= NULL
;
4647 struct ata_port_info
*port
[2];
4649 unsigned int legacy_mode
= 0;
4650 int disable_dev_on_err
= 1;
4655 port
[0] = port_info
[0];
4657 port
[1] = port_info
[1];
4661 if ((port
[0]->host_flags
& ATA_FLAG_NO_LEGACY
) == 0
4662 && (pdev
->class >> 8) == PCI_CLASS_STORAGE_IDE
) {
4663 /* TODO: What if one channel is in native mode ... */
4664 pci_read_config_byte(pdev
, PCI_CLASS_PROG
, &tmp8
);
4665 mask
= (1 << 2) | (1 << 0);
4666 if ((tmp8
& mask
) != mask
)
4667 legacy_mode
= (1 << 3);
4671 if ((!legacy_mode
) && (n_ports
> 2)) {
4672 printk(KERN_ERR
"ata: BUG: native mode, n_ports > 2\n");
4677 /* FIXME: Really for ATA it isn't safe because the device may be
4678 multi-purpose and we want to leave it alone if it was already
4679 enabled. Secondly for shared use as Arjan says we want refcounting
4681 Checking dev->is_enabled is insufficient as this is not set at
4682 boot for the primary video which is BIOS enabled
4685 rc
= pci_enable_device(pdev
);
4689 rc
= pci_request_regions(pdev
, DRV_NAME
);
4691 disable_dev_on_err
= 0;
4695 /* FIXME: Should use platform specific mappers for legacy port ranges */
4697 if (!request_region(0x1f0, 8, "libata")) {
4698 struct resource
*conflict
, res
;
4700 res
.end
= 0x1f0 + 8 - 1;
4701 conflict
= ____request_resource(&ioport_resource
, &res
);
4702 if (!strcmp(conflict
->name
, "libata"))
4703 legacy_mode
|= (1 << 0);
4705 disable_dev_on_err
= 0;
4706 printk(KERN_WARNING
"ata: 0x1f0 IDE port busy\n");
4709 legacy_mode
|= (1 << 0);
4711 if (!request_region(0x170, 8, "libata")) {
4712 struct resource
*conflict
, res
;
4714 res
.end
= 0x170 + 8 - 1;
4715 conflict
= ____request_resource(&ioport_resource
, &res
);
4716 if (!strcmp(conflict
->name
, "libata"))
4717 legacy_mode
|= (1 << 1);
4719 disable_dev_on_err
= 0;
4720 printk(KERN_WARNING
"ata: 0x170 IDE port busy\n");
4723 legacy_mode
|= (1 << 1);
4726 /* we have legacy mode, but all ports are unavailable */
4727 if (legacy_mode
== (1 << 3)) {
4729 goto err_out_regions
;
4732 rc
= pci_set_dma_mask(pdev
, ATA_DMA_MASK
);
4734 goto err_out_regions
;
4735 rc
= pci_set_consistent_dma_mask(pdev
, ATA_DMA_MASK
);
4737 goto err_out_regions
;
4740 if (legacy_mode
& (1 << 0))
4741 probe_ent
= ata_pci_init_legacy_port(pdev
, port
, 0);
4742 if (legacy_mode
& (1 << 1))
4743 probe_ent2
= ata_pci_init_legacy_port(pdev
, port
, 1);
4746 probe_ent
= ata_pci_init_native_mode(pdev
, port
, ATA_PORT_PRIMARY
| ATA_PORT_SECONDARY
);
4748 probe_ent
= ata_pci_init_native_mode(pdev
, port
, ATA_PORT_PRIMARY
);
4750 if (!probe_ent
&& !probe_ent2
) {
4752 goto err_out_regions
;
4755 pci_set_master(pdev
);
4757 /* FIXME: check ata_device_add return */
4759 if (legacy_mode
& (1 << 0))
4760 ata_device_add(probe_ent
);
4761 if (legacy_mode
& (1 << 1))
4762 ata_device_add(probe_ent2
);
4764 ata_device_add(probe_ent
);
4772 if (legacy_mode
& (1 << 0))
4773 release_region(0x1f0, 8);
4774 if (legacy_mode
& (1 << 1))
4775 release_region(0x170, 8);
4776 pci_release_regions(pdev
);
4778 if (disable_dev_on_err
)
4779 pci_disable_device(pdev
);
4784 * ata_pci_remove_one - PCI layer callback for device removal
4785 * @pdev: PCI device that was removed
4787 * PCI layer indicates to libata via this hook that
4788 * hot-unplug or module unload event has occured.
4789 * Handle this by unregistering all objects associated
4790 * with this PCI device. Free those objects. Then finally
4791 * release PCI resources and disable device.
4794 * Inherited from PCI layer (may sleep).
4797 void ata_pci_remove_one (struct pci_dev
*pdev
)
4799 struct device
*dev
= pci_dev_to_dev(pdev
);
4800 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
4802 ata_host_set_remove(host_set
);
4803 pci_release_regions(pdev
);
4804 pci_disable_device(pdev
);
4805 dev_set_drvdata(dev
, NULL
);
4808 /* move to PCI subsystem */
4809 int pci_test_config_bits(struct pci_dev
*pdev
, struct pci_bits
*bits
)
4811 unsigned long tmp
= 0;
4813 switch (bits
->width
) {
4816 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
4822 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
4828 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
4839 return (tmp
== bits
->val
) ? 1 : 0;
4841 #endif /* CONFIG_PCI */
4844 static int __init
ata_init(void)
4846 ata_wq
= create_workqueue("ata");
4850 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
4854 static void __exit
ata_exit(void)
4856 destroy_workqueue(ata_wq
);
4859 module_init(ata_init
);
4860 module_exit(ata_exit
);
4862 static unsigned long ratelimit_time
;
4863 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
4865 int ata_ratelimit(void)
4868 unsigned long flags
;
4870 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
4872 if (time_after(jiffies
, ratelimit_time
)) {
4874 ratelimit_time
= jiffies
+ (HZ
/5);
4878 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
4884 * libata is essentially a library of internal helper functions for
4885 * low-level ATA host controller drivers. As such, the API/ABI is
4886 * likely to change as new drivers are added and updated.
4887 * Do not depend on ABI/API stability.
4890 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
4891 EXPORT_SYMBOL_GPL(ata_std_ports
);
4892 EXPORT_SYMBOL_GPL(ata_device_add
);
4893 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
4894 EXPORT_SYMBOL_GPL(ata_sg_init
);
4895 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
4896 EXPORT_SYMBOL_GPL(ata_qc_complete
);
4897 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
4898 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
4899 EXPORT_SYMBOL_GPL(ata_tf_load
);
4900 EXPORT_SYMBOL_GPL(ata_tf_read
);
4901 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
4902 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
4903 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
4904 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
4905 EXPORT_SYMBOL_GPL(ata_check_status
);
4906 EXPORT_SYMBOL_GPL(ata_altstatus
);
4907 EXPORT_SYMBOL_GPL(ata_chk_err
);
4908 EXPORT_SYMBOL_GPL(ata_exec_command
);
4909 EXPORT_SYMBOL_GPL(ata_port_start
);
4910 EXPORT_SYMBOL_GPL(ata_port_stop
);
4911 EXPORT_SYMBOL_GPL(ata_host_stop
);
4912 EXPORT_SYMBOL_GPL(ata_interrupt
);
4913 EXPORT_SYMBOL_GPL(ata_qc_prep
);
4914 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
4915 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
4916 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
4917 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
4918 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
4919 EXPORT_SYMBOL_GPL(ata_port_probe
);
4920 EXPORT_SYMBOL_GPL(sata_phy_reset
);
4921 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
4922 EXPORT_SYMBOL_GPL(ata_bus_reset
);
4923 EXPORT_SYMBOL_GPL(ata_port_disable
);
4924 EXPORT_SYMBOL_GPL(ata_ratelimit
);
4925 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
4926 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
4927 EXPORT_SYMBOL_GPL(ata_scsi_error
);
4928 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
4929 EXPORT_SYMBOL_GPL(ata_scsi_release
);
4930 EXPORT_SYMBOL_GPL(ata_host_intr
);
4931 EXPORT_SYMBOL_GPL(ata_dev_classify
);
4932 EXPORT_SYMBOL_GPL(ata_dev_id_string
);
4933 EXPORT_SYMBOL_GPL(ata_dev_config
);
4934 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
4937 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
4938 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
4939 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
4940 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
4941 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
4942 #endif /* CONFIG_PCI */