2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
35 #include <linux/config.h>
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/pci.h>
39 #include <linux/init.h>
40 #include <linux/list.h>
42 #include <linux/highmem.h>
43 #include <linux/spinlock.h>
44 #include <linux/blkdev.h>
45 #include <linux/delay.h>
46 #include <linux/timer.h>
47 #include <linux/interrupt.h>
48 #include <linux/completion.h>
49 #include <linux/suspend.h>
50 #include <linux/workqueue.h>
51 #include <linux/jiffies.h>
52 #include <linux/scatterlist.h>
53 #include <scsi/scsi.h>
54 #include "scsi_priv.h"
55 #include <scsi/scsi_cmnd.h>
56 #include <scsi/scsi_host.h>
57 #include <linux/libata.h>
59 #include <asm/semaphore.h>
60 #include <asm/byteorder.h>
64 static unsigned int ata_busy_sleep (struct ata_port
*ap
,
65 unsigned long tmout_pat
,
67 static void ata_dev_reread_id(struct ata_port
*ap
, struct ata_device
*dev
);
68 static void ata_dev_init_params(struct ata_port
*ap
, struct ata_device
*dev
);
69 static void ata_set_mode(struct ata_port
*ap
);
70 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
);
71 static unsigned int ata_get_mode_mask(const struct ata_port
*ap
, int shift
);
72 static int fgb(u32 bitmap
);
73 static int ata_choose_xfer_mode(const struct ata_port
*ap
,
75 unsigned int *xfer_shift_out
);
76 static void __ata_qc_complete(struct ata_queued_cmd
*qc
);
78 static unsigned int ata_unique_id
= 1;
79 static struct workqueue_struct
*ata_wq
;
81 int atapi_enabled
= 0;
82 module_param(atapi_enabled
, int, 0444);
83 MODULE_PARM_DESC(atapi_enabled
, "Enable discovery of ATAPI devices (0=off, 1=on)");
85 MODULE_AUTHOR("Jeff Garzik");
86 MODULE_DESCRIPTION("Library module for ATA devices");
87 MODULE_LICENSE("GPL");
88 MODULE_VERSION(DRV_VERSION
);
91 * ata_tf_load_pio - send taskfile registers to host controller
92 * @ap: Port to which output is sent
93 * @tf: ATA taskfile register set
95 * Outputs ATA taskfile to standard ATA host controller.
98 * Inherited from caller.
101 static void ata_tf_load_pio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
103 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
104 unsigned int is_addr
= tf
->flags
& ATA_TFLAG_ISADDR
;
106 if (tf
->ctl
!= ap
->last_ctl
) {
107 outb(tf
->ctl
, ioaddr
->ctl_addr
);
108 ap
->last_ctl
= tf
->ctl
;
112 if (is_addr
&& (tf
->flags
& ATA_TFLAG_LBA48
)) {
113 outb(tf
->hob_feature
, ioaddr
->feature_addr
);
114 outb(tf
->hob_nsect
, ioaddr
->nsect_addr
);
115 outb(tf
->hob_lbal
, ioaddr
->lbal_addr
);
116 outb(tf
->hob_lbam
, ioaddr
->lbam_addr
);
117 outb(tf
->hob_lbah
, ioaddr
->lbah_addr
);
118 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
127 outb(tf
->feature
, ioaddr
->feature_addr
);
128 outb(tf
->nsect
, ioaddr
->nsect_addr
);
129 outb(tf
->lbal
, ioaddr
->lbal_addr
);
130 outb(tf
->lbam
, ioaddr
->lbam_addr
);
131 outb(tf
->lbah
, ioaddr
->lbah_addr
);
132 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
140 if (tf
->flags
& ATA_TFLAG_DEVICE
) {
141 outb(tf
->device
, ioaddr
->device_addr
);
142 VPRINTK("device 0x%X\n", tf
->device
);
149 * ata_tf_load_mmio - send taskfile registers to host controller
150 * @ap: Port to which output is sent
151 * @tf: ATA taskfile register set
153 * Outputs ATA taskfile to standard ATA host controller using MMIO.
156 * Inherited from caller.
159 static void ata_tf_load_mmio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
161 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
162 unsigned int is_addr
= tf
->flags
& ATA_TFLAG_ISADDR
;
164 if (tf
->ctl
!= ap
->last_ctl
) {
165 writeb(tf
->ctl
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
166 ap
->last_ctl
= tf
->ctl
;
170 if (is_addr
&& (tf
->flags
& ATA_TFLAG_LBA48
)) {
171 writeb(tf
->hob_feature
, (void __iomem
*) ioaddr
->feature_addr
);
172 writeb(tf
->hob_nsect
, (void __iomem
*) ioaddr
->nsect_addr
);
173 writeb(tf
->hob_lbal
, (void __iomem
*) ioaddr
->lbal_addr
);
174 writeb(tf
->hob_lbam
, (void __iomem
*) ioaddr
->lbam_addr
);
175 writeb(tf
->hob_lbah
, (void __iomem
*) ioaddr
->lbah_addr
);
176 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
185 writeb(tf
->feature
, (void __iomem
*) ioaddr
->feature_addr
);
186 writeb(tf
->nsect
, (void __iomem
*) ioaddr
->nsect_addr
);
187 writeb(tf
->lbal
, (void __iomem
*) ioaddr
->lbal_addr
);
188 writeb(tf
->lbam
, (void __iomem
*) ioaddr
->lbam_addr
);
189 writeb(tf
->lbah
, (void __iomem
*) ioaddr
->lbah_addr
);
190 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
198 if (tf
->flags
& ATA_TFLAG_DEVICE
) {
199 writeb(tf
->device
, (void __iomem
*) ioaddr
->device_addr
);
200 VPRINTK("device 0x%X\n", tf
->device
);
208 * ata_tf_load - send taskfile registers to host controller
209 * @ap: Port to which output is sent
210 * @tf: ATA taskfile register set
212 * Outputs ATA taskfile to standard ATA host controller using MMIO
213 * or PIO as indicated by the ATA_FLAG_MMIO flag.
214 * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
215 * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
216 * hob_lbal, hob_lbam, and hob_lbah.
218 * This function waits for idle (!BUSY and !DRQ) after writing
219 * registers. If the control register has a new value, this
220 * function also waits for idle after writing control and before
221 * writing the remaining registers.
223 * May be used as the tf_load() entry in ata_port_operations.
226 * Inherited from caller.
228 void ata_tf_load(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
230 if (ap
->flags
& ATA_FLAG_MMIO
)
231 ata_tf_load_mmio(ap
, tf
);
233 ata_tf_load_pio(ap
, tf
);
237 * ata_exec_command_pio - issue ATA command to host controller
238 * @ap: port to which command is being issued
239 * @tf: ATA taskfile register set
241 * Issues PIO write to ATA command register, with proper
242 * synchronization with interrupt handler / other threads.
245 * spin_lock_irqsave(host_set lock)
248 static void ata_exec_command_pio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
250 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
252 outb(tf
->command
, ap
->ioaddr
.command_addr
);
258 * ata_exec_command_mmio - issue ATA command to host controller
259 * @ap: port to which command is being issued
260 * @tf: ATA taskfile register set
262 * Issues MMIO write to ATA command register, with proper
263 * synchronization with interrupt handler / other threads.
266 * spin_lock_irqsave(host_set lock)
269 static void ata_exec_command_mmio(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
271 DPRINTK("ata%u: cmd 0x%X\n", ap
->id
, tf
->command
);
273 writeb(tf
->command
, (void __iomem
*) ap
->ioaddr
.command_addr
);
279 * ata_exec_command - issue ATA command to host controller
280 * @ap: port to which command is being issued
281 * @tf: ATA taskfile register set
283 * Issues PIO/MMIO write to ATA command register, with proper
284 * synchronization with interrupt handler / other threads.
287 * spin_lock_irqsave(host_set lock)
289 void ata_exec_command(struct ata_port
*ap
, const struct ata_taskfile
*tf
)
291 if (ap
->flags
& ATA_FLAG_MMIO
)
292 ata_exec_command_mmio(ap
, tf
);
294 ata_exec_command_pio(ap
, tf
);
298 * ata_tf_to_host - issue ATA taskfile to host controller
299 * @ap: port to which command is being issued
300 * @tf: ATA taskfile register set
302 * Issues ATA taskfile register set to ATA host controller,
303 * with proper synchronization with interrupt handler and
307 * spin_lock_irqsave(host_set lock)
310 static inline void ata_tf_to_host(struct ata_port
*ap
,
311 const struct ata_taskfile
*tf
)
313 ap
->ops
->tf_load(ap
, tf
);
314 ap
->ops
->exec_command(ap
, tf
);
318 * ata_tf_read_pio - input device's ATA taskfile shadow registers
319 * @ap: Port from which input is read
320 * @tf: ATA taskfile register set for storing input
322 * Reads ATA taskfile registers for currently-selected device
326 * Inherited from caller.
329 static void ata_tf_read_pio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
331 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
333 tf
->command
= ata_check_status(ap
);
334 tf
->feature
= inb(ioaddr
->error_addr
);
335 tf
->nsect
= inb(ioaddr
->nsect_addr
);
336 tf
->lbal
= inb(ioaddr
->lbal_addr
);
337 tf
->lbam
= inb(ioaddr
->lbam_addr
);
338 tf
->lbah
= inb(ioaddr
->lbah_addr
);
339 tf
->device
= inb(ioaddr
->device_addr
);
341 if (tf
->flags
& ATA_TFLAG_LBA48
) {
342 outb(tf
->ctl
| ATA_HOB
, ioaddr
->ctl_addr
);
343 tf
->hob_feature
= inb(ioaddr
->error_addr
);
344 tf
->hob_nsect
= inb(ioaddr
->nsect_addr
);
345 tf
->hob_lbal
= inb(ioaddr
->lbal_addr
);
346 tf
->hob_lbam
= inb(ioaddr
->lbam_addr
);
347 tf
->hob_lbah
= inb(ioaddr
->lbah_addr
);
352 * ata_tf_read_mmio - input device's ATA taskfile shadow registers
353 * @ap: Port from which input is read
354 * @tf: ATA taskfile register set for storing input
356 * Reads ATA taskfile registers for currently-selected device
360 * Inherited from caller.
363 static void ata_tf_read_mmio(struct ata_port
*ap
, struct ata_taskfile
*tf
)
365 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
367 tf
->command
= ata_check_status(ap
);
368 tf
->feature
= readb((void __iomem
*)ioaddr
->error_addr
);
369 tf
->nsect
= readb((void __iomem
*)ioaddr
->nsect_addr
);
370 tf
->lbal
= readb((void __iomem
*)ioaddr
->lbal_addr
);
371 tf
->lbam
= readb((void __iomem
*)ioaddr
->lbam_addr
);
372 tf
->lbah
= readb((void __iomem
*)ioaddr
->lbah_addr
);
373 tf
->device
= readb((void __iomem
*)ioaddr
->device_addr
);
375 if (tf
->flags
& ATA_TFLAG_LBA48
) {
376 writeb(tf
->ctl
| ATA_HOB
, (void __iomem
*) ap
->ioaddr
.ctl_addr
);
377 tf
->hob_feature
= readb((void __iomem
*)ioaddr
->error_addr
);
378 tf
->hob_nsect
= readb((void __iomem
*)ioaddr
->nsect_addr
);
379 tf
->hob_lbal
= readb((void __iomem
*)ioaddr
->lbal_addr
);
380 tf
->hob_lbam
= readb((void __iomem
*)ioaddr
->lbam_addr
);
381 tf
->hob_lbah
= readb((void __iomem
*)ioaddr
->lbah_addr
);
387 * ata_tf_read - input device's ATA taskfile shadow registers
388 * @ap: Port from which input is read
389 * @tf: ATA taskfile register set for storing input
391 * Reads ATA taskfile registers for currently-selected device
394 * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48
395 * is set, also reads the hob registers.
397 * May be used as the tf_read() entry in ata_port_operations.
400 * Inherited from caller.
402 void ata_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
)
404 if (ap
->flags
& ATA_FLAG_MMIO
)
405 ata_tf_read_mmio(ap
, tf
);
407 ata_tf_read_pio(ap
, tf
);
411 * ata_check_status_pio - Read device status reg & clear interrupt
412 * @ap: port where the device is
414 * Reads ATA taskfile status register for currently-selected device
415 * and return its value. This also clears pending interrupts
419 * Inherited from caller.
421 static u8
ata_check_status_pio(struct ata_port
*ap
)
423 return inb(ap
->ioaddr
.status_addr
);
427 * ata_check_status_mmio - Read device status reg & clear interrupt
428 * @ap: port where the device is
430 * Reads ATA taskfile status register for currently-selected device
431 * via MMIO and return its value. This also clears pending interrupts
435 * Inherited from caller.
437 static u8
ata_check_status_mmio(struct ata_port
*ap
)
439 return readb((void __iomem
*) ap
->ioaddr
.status_addr
);
444 * ata_check_status - Read device status reg & clear interrupt
445 * @ap: port where the device is
447 * Reads ATA taskfile status register for currently-selected device
448 * and return its value. This also clears pending interrupts
451 * May be used as the check_status() entry in ata_port_operations.
454 * Inherited from caller.
456 u8
ata_check_status(struct ata_port
*ap
)
458 if (ap
->flags
& ATA_FLAG_MMIO
)
459 return ata_check_status_mmio(ap
);
460 return ata_check_status_pio(ap
);
465 * ata_altstatus - Read device alternate status reg
466 * @ap: port where the device is
468 * Reads ATA taskfile alternate status register for
469 * currently-selected device and return its value.
471 * Note: may NOT be used as the check_altstatus() entry in
472 * ata_port_operations.
475 * Inherited from caller.
477 u8
ata_altstatus(struct ata_port
*ap
)
479 if (ap
->ops
->check_altstatus
)
480 return ap
->ops
->check_altstatus(ap
);
482 if (ap
->flags
& ATA_FLAG_MMIO
)
483 return readb((void __iomem
*)ap
->ioaddr
.altstatus_addr
);
484 return inb(ap
->ioaddr
.altstatus_addr
);
489 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
490 * @tf: Taskfile to convert
491 * @fis: Buffer into which data will output
492 * @pmp: Port multiplier port
494 * Converts a standard ATA taskfile to a Serial ATA
495 * FIS structure (Register - Host to Device).
498 * Inherited from caller.
501 void ata_tf_to_fis(const struct ata_taskfile
*tf
, u8
*fis
, u8 pmp
)
503 fis
[0] = 0x27; /* Register - Host to Device FIS */
504 fis
[1] = (pmp
& 0xf) | (1 << 7); /* Port multiplier number,
505 bit 7 indicates Command FIS */
506 fis
[2] = tf
->command
;
507 fis
[3] = tf
->feature
;
514 fis
[8] = tf
->hob_lbal
;
515 fis
[9] = tf
->hob_lbam
;
516 fis
[10] = tf
->hob_lbah
;
517 fis
[11] = tf
->hob_feature
;
520 fis
[13] = tf
->hob_nsect
;
531 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
532 * @fis: Buffer from which data will be input
533 * @tf: Taskfile to output
535 * Converts a serial ATA FIS structure to a standard ATA taskfile.
538 * Inherited from caller.
541 void ata_tf_from_fis(const u8
*fis
, struct ata_taskfile
*tf
)
543 tf
->command
= fis
[2]; /* status */
544 tf
->feature
= fis
[3]; /* error */
551 tf
->hob_lbal
= fis
[8];
552 tf
->hob_lbam
= fis
[9];
553 tf
->hob_lbah
= fis
[10];
556 tf
->hob_nsect
= fis
[13];
559 static const u8 ata_rw_cmds
[] = {
563 ATA_CMD_READ_MULTI_EXT
,
564 ATA_CMD_WRITE_MULTI_EXT
,
568 ATA_CMD_WRITE_MULTI_FUA_EXT
,
572 ATA_CMD_PIO_READ_EXT
,
573 ATA_CMD_PIO_WRITE_EXT
,
586 ATA_CMD_WRITE_FUA_EXT
590 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
591 * @qc: command to examine and configure
593 * Examine the device configuration and tf->flags to calculate
594 * the proper read/write commands and protocol to use.
599 int ata_rwcmd_protocol(struct ata_queued_cmd
*qc
)
601 struct ata_taskfile
*tf
= &qc
->tf
;
602 struct ata_device
*dev
= qc
->dev
;
605 int index
, fua
, lba48
, write
;
607 fua
= (tf
->flags
& ATA_TFLAG_FUA
) ? 4 : 0;
608 lba48
= (tf
->flags
& ATA_TFLAG_LBA48
) ? 2 : 0;
609 write
= (tf
->flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
611 if (dev
->flags
& ATA_DFLAG_PIO
) {
612 tf
->protocol
= ATA_PROT_PIO
;
613 index
= dev
->multi_count
? 0 : 8;
615 tf
->protocol
= ATA_PROT_DMA
;
619 cmd
= ata_rw_cmds
[index
+ fua
+ lba48
+ write
];
627 static const char * const xfer_mode_str
[] = {
647 * ata_udma_string - convert UDMA bit offset to string
648 * @mask: mask of bits supported; only highest bit counts.
650 * Determine string which represents the highest speed
651 * (highest bit in @udma_mask).
657 * Constant C string representing highest speed listed in
658 * @udma_mask, or the constant C string "<n/a>".
661 static const char *ata_mode_string(unsigned int mask
)
665 for (i
= 7; i
>= 0; i
--)
668 for (i
= ATA_SHIFT_MWDMA
+ 2; i
>= ATA_SHIFT_MWDMA
; i
--)
671 for (i
= ATA_SHIFT_PIO
+ 4; i
>= ATA_SHIFT_PIO
; i
--)
678 return xfer_mode_str
[i
];
682 * ata_pio_devchk - PATA device presence detection
683 * @ap: ATA channel to examine
684 * @device: Device to examine (starting at zero)
686 * This technique was originally described in
687 * Hale Landis's ATADRVR (www.ata-atapi.com), and
688 * later found its way into the ATA/ATAPI spec.
690 * Write a pattern to the ATA shadow registers,
691 * and if a device is present, it will respond by
692 * correctly storing and echoing back the
693 * ATA shadow register contents.
699 static unsigned int ata_pio_devchk(struct ata_port
*ap
,
702 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
705 ap
->ops
->dev_select(ap
, device
);
707 outb(0x55, ioaddr
->nsect_addr
);
708 outb(0xaa, ioaddr
->lbal_addr
);
710 outb(0xaa, ioaddr
->nsect_addr
);
711 outb(0x55, ioaddr
->lbal_addr
);
713 outb(0x55, ioaddr
->nsect_addr
);
714 outb(0xaa, ioaddr
->lbal_addr
);
716 nsect
= inb(ioaddr
->nsect_addr
);
717 lbal
= inb(ioaddr
->lbal_addr
);
719 if ((nsect
== 0x55) && (lbal
== 0xaa))
720 return 1; /* we found a device */
722 return 0; /* nothing found */
726 * ata_mmio_devchk - PATA device presence detection
727 * @ap: ATA channel to examine
728 * @device: Device to examine (starting at zero)
730 * This technique was originally described in
731 * Hale Landis's ATADRVR (www.ata-atapi.com), and
732 * later found its way into the ATA/ATAPI spec.
734 * Write a pattern to the ATA shadow registers,
735 * and if a device is present, it will respond by
736 * correctly storing and echoing back the
737 * ATA shadow register contents.
743 static unsigned int ata_mmio_devchk(struct ata_port
*ap
,
746 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
749 ap
->ops
->dev_select(ap
, device
);
751 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
752 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
754 writeb(0xaa, (void __iomem
*) ioaddr
->nsect_addr
);
755 writeb(0x55, (void __iomem
*) ioaddr
->lbal_addr
);
757 writeb(0x55, (void __iomem
*) ioaddr
->nsect_addr
);
758 writeb(0xaa, (void __iomem
*) ioaddr
->lbal_addr
);
760 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
761 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
763 if ((nsect
== 0x55) && (lbal
== 0xaa))
764 return 1; /* we found a device */
766 return 0; /* nothing found */
770 * ata_devchk - PATA device presence detection
771 * @ap: ATA channel to examine
772 * @device: Device to examine (starting at zero)
774 * Dispatch ATA device presence detection, depending
775 * on whether we are using PIO or MMIO to talk to the
776 * ATA shadow registers.
782 static unsigned int ata_devchk(struct ata_port
*ap
,
785 if (ap
->flags
& ATA_FLAG_MMIO
)
786 return ata_mmio_devchk(ap
, device
);
787 return ata_pio_devchk(ap
, device
);
791 * ata_dev_classify - determine device type based on ATA-spec signature
792 * @tf: ATA taskfile register set for device to be identified
794 * Determine from taskfile register contents whether a device is
795 * ATA or ATAPI, as per "Signature and persistence" section
796 * of ATA/PI spec (volume 1, sect 5.14).
802 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, or %ATA_DEV_UNKNOWN
803 * the event of failure.
806 unsigned int ata_dev_classify(const struct ata_taskfile
*tf
)
808 /* Apple's open source Darwin code hints that some devices only
809 * put a proper signature into the LBA mid/high registers,
810 * So, we only check those. It's sufficient for uniqueness.
813 if (((tf
->lbam
== 0) && (tf
->lbah
== 0)) ||
814 ((tf
->lbam
== 0x3c) && (tf
->lbah
== 0xc3))) {
815 DPRINTK("found ATA device by sig\n");
819 if (((tf
->lbam
== 0x14) && (tf
->lbah
== 0xeb)) ||
820 ((tf
->lbam
== 0x69) && (tf
->lbah
== 0x96))) {
821 DPRINTK("found ATAPI device by sig\n");
822 return ATA_DEV_ATAPI
;
825 DPRINTK("unknown device\n");
826 return ATA_DEV_UNKNOWN
;
830 * ata_dev_try_classify - Parse returned ATA device signature
831 * @ap: ATA channel to examine
832 * @device: Device to examine (starting at zero)
834 * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
835 * an ATA/ATAPI-defined set of values is placed in the ATA
836 * shadow registers, indicating the results of device detection
839 * Select the ATA device, and read the values from the ATA shadow
840 * registers. Then parse according to the Error register value,
841 * and the spec-defined values examined by ata_dev_classify().
847 static u8
ata_dev_try_classify(struct ata_port
*ap
, unsigned int device
)
849 struct ata_device
*dev
= &ap
->device
[device
];
850 struct ata_taskfile tf
;
854 ap
->ops
->dev_select(ap
, device
);
856 memset(&tf
, 0, sizeof(tf
));
858 ap
->ops
->tf_read(ap
, &tf
);
861 dev
->class = ATA_DEV_NONE
;
863 /* see if device passed diags */
866 else if ((device
== 0) && (err
== 0x81))
871 /* determine if device if ATA or ATAPI */
872 class = ata_dev_classify(&tf
);
873 if (class == ATA_DEV_UNKNOWN
)
875 if ((class == ATA_DEV_ATA
) && (ata_chk_status(ap
) == 0))
884 * ata_dev_id_string - Convert IDENTIFY DEVICE page into string
885 * @id: IDENTIFY DEVICE results we will examine
886 * @s: string into which data is output
887 * @ofs: offset into identify device page
888 * @len: length of string to return. must be an even number.
890 * The strings in the IDENTIFY DEVICE page are broken up into
891 * 16-bit chunks. Run through the string, and output each
892 * 8-bit chunk linearly, regardless of platform.
898 void ata_dev_id_string(const u16
*id
, unsigned char *s
,
899 unsigned int ofs
, unsigned int len
)
919 * ata_noop_dev_select - Select device 0/1 on ATA bus
920 * @ap: ATA channel to manipulate
921 * @device: ATA device (numbered from zero) to select
923 * This function performs no actual function.
925 * May be used as the dev_select() entry in ata_port_operations.
930 void ata_noop_dev_select (struct ata_port
*ap
, unsigned int device
)
936 * ata_std_dev_select - Select device 0/1 on ATA bus
937 * @ap: ATA channel to manipulate
938 * @device: ATA device (numbered from zero) to select
940 * Use the method defined in the ATA specification to
941 * make either device 0, or device 1, active on the
942 * ATA channel. Works with both PIO and MMIO.
944 * May be used as the dev_select() entry in ata_port_operations.
950 void ata_std_dev_select (struct ata_port
*ap
, unsigned int device
)
955 tmp
= ATA_DEVICE_OBS
;
957 tmp
= ATA_DEVICE_OBS
| ATA_DEV1
;
959 if (ap
->flags
& ATA_FLAG_MMIO
) {
960 writeb(tmp
, (void __iomem
*) ap
->ioaddr
.device_addr
);
962 outb(tmp
, ap
->ioaddr
.device_addr
);
964 ata_pause(ap
); /* needed; also flushes, for mmio */
968 * ata_dev_select - Select device 0/1 on ATA bus
969 * @ap: ATA channel to manipulate
970 * @device: ATA device (numbered from zero) to select
971 * @wait: non-zero to wait for Status register BSY bit to clear
972 * @can_sleep: non-zero if context allows sleeping
974 * Use the method defined in the ATA specification to
975 * make either device 0, or device 1, active on the
978 * This is a high-level version of ata_std_dev_select(),
979 * which additionally provides the services of inserting
980 * the proper pauses and status polling, where needed.
986 void ata_dev_select(struct ata_port
*ap
, unsigned int device
,
987 unsigned int wait
, unsigned int can_sleep
)
989 VPRINTK("ENTER, ata%u: device %u, wait %u\n",
990 ap
->id
, device
, wait
);
995 ap
->ops
->dev_select(ap
, device
);
998 if (can_sleep
&& ap
->device
[device
].class == ATA_DEV_ATAPI
)
1005 * ata_dump_id - IDENTIFY DEVICE info debugging output
1006 * @dev: Device whose IDENTIFY DEVICE page we will dump
1008 * Dump selected 16-bit words from a detected device's
1009 * IDENTIFY PAGE page.
1015 static inline void ata_dump_id(const struct ata_device
*dev
)
1017 DPRINTK("49==0x%04x "
1027 DPRINTK("80==0x%04x "
1037 DPRINTK("88==0x%04x "
1044 * Compute the PIO modes available for this device. This is not as
1045 * trivial as it seems if we must consider early devices correctly.
1047 * FIXME: pre IDE drive timing (do we care ?).
1050 static unsigned int ata_pio_modes(const struct ata_device
*adev
)
1054 /* Usual case. Word 53 indicates word 64 is valid */
1055 if (adev
->id
[ATA_ID_FIELD_VALID
] & (1 << 1)) {
1056 modes
= adev
->id
[ATA_ID_PIO_MODES
] & 0x03;
1062 /* If word 64 isn't valid then Word 51 high byte holds the PIO timing
1063 number for the maximum. Turn it into a mask and return it */
1064 modes
= (2 << ((adev
->id
[ATA_ID_OLD_PIO_MODES
] >> 8) & 0xFF)) - 1 ;
1066 /* But wait.. there's more. Design your standards by committee and
1067 you too can get a free iordy field to process. However its the
1068 speeds not the modes that are supported... Note drivers using the
1069 timing API will get this right anyway */
1072 struct ata_exec_internal_arg
{
1073 unsigned int err_mask
;
1074 struct ata_taskfile
*tf
;
1075 struct completion
*waiting
;
1078 int ata_qc_complete_internal(struct ata_queued_cmd
*qc
)
1080 struct ata_exec_internal_arg
*arg
= qc
->private_data
;
1081 struct completion
*waiting
= arg
->waiting
;
1083 if (!(qc
->err_mask
& ~AC_ERR_DEV
))
1084 qc
->ap
->ops
->tf_read(qc
->ap
, arg
->tf
);
1085 arg
->err_mask
= qc
->err_mask
;
1086 arg
->waiting
= NULL
;
1093 * ata_exec_internal - execute libata internal command
1094 * @ap: Port to which the command is sent
1095 * @dev: Device to which the command is sent
1096 * @tf: Taskfile registers for the command and the result
1097 * @dma_dir: Data tranfer direction of the command
1098 * @buf: Data buffer of the command
1099 * @buflen: Length of data buffer
1101 * Executes libata internal command with timeout. @tf contains
1102 * command on entry and result on return. Timeout and error
1103 * conditions are reported via return value. No recovery action
1104 * is taken after a command times out. It's caller's duty to
1105 * clean up after timeout.
1108 * None. Should be called with kernel context, might sleep.
1112 ata_exec_internal(struct ata_port
*ap
, struct ata_device
*dev
,
1113 struct ata_taskfile
*tf
,
1114 int dma_dir
, void *buf
, unsigned int buflen
)
1116 u8 command
= tf
->command
;
1117 struct ata_queued_cmd
*qc
;
1118 DECLARE_COMPLETION(wait
);
1119 unsigned long flags
;
1120 struct ata_exec_internal_arg arg
;
1122 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1124 qc
= ata_qc_new_init(ap
, dev
);
1128 qc
->dma_dir
= dma_dir
;
1129 if (dma_dir
!= DMA_NONE
) {
1130 ata_sg_init_one(qc
, buf
, buflen
);
1131 qc
->nsect
= buflen
/ ATA_SECT_SIZE
;
1134 arg
.waiting
= &wait
;
1136 qc
->private_data
= &arg
;
1137 qc
->complete_fn
= ata_qc_complete_internal
;
1139 if (ata_qc_issue(qc
))
1142 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1144 if (!wait_for_completion_timeout(&wait
, ATA_TMOUT_INTERNAL
)) {
1145 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
1147 /* We're racing with irq here. If we lose, the
1148 * following test prevents us from completing the qc
1149 * again. If completion irq occurs after here but
1150 * before the caller cleans up, it will result in a
1151 * spurious interrupt. We can live with that.
1154 qc
->err_mask
= AC_ERR_OTHER
;
1155 ata_qc_complete(qc
);
1156 printk(KERN_WARNING
"ata%u: qc timeout (cmd 0x%x)\n",
1160 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1163 return arg
.err_mask
;
1167 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
1168 return AC_ERR_OTHER
;
1172 * ata_dev_identify - obtain IDENTIFY x DEVICE page
1173 * @ap: port on which device we wish to probe resides
1174 * @device: device bus address, starting at zero
1176 * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE
1177 * command, and read back the 512-byte device information page.
1178 * The device information page is fed to us via the standard
1179 * PIO-IN protocol, but we hand-code it here. (TODO: investigate
1180 * using standard PIO-IN paths)
1182 * After reading the device information page, we use several
1183 * bits of information from it to initialize data structures
1184 * that will be used during the lifetime of the ata_device.
1185 * Other data from the info page is used to disqualify certain
1186 * older ATA devices we do not wish to support.
1189 * Inherited from caller. Some functions called by this function
1190 * obtain the host_set lock.
1193 static void ata_dev_identify(struct ata_port
*ap
, unsigned int device
)
1195 struct ata_device
*dev
= &ap
->device
[device
];
1196 unsigned int major_version
;
1198 unsigned long xfer_modes
;
1199 unsigned int using_edd
;
1200 struct ata_taskfile tf
;
1201 unsigned int err_mask
;
1204 if (!ata_dev_present(dev
)) {
1205 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
1210 if (ap
->flags
& (ATA_FLAG_SRST
| ATA_FLAG_SATA_RESET
))
1215 DPRINTK("ENTER, host %u, dev %u\n", ap
->id
, device
);
1217 assert (dev
->class == ATA_DEV_ATA
|| dev
->class == ATA_DEV_ATAPI
||
1218 dev
->class == ATA_DEV_NONE
);
1220 ata_dev_select(ap
, device
, 1, 1); /* select device 0/1 */
1223 ata_tf_init(ap
, &tf
, device
);
1225 if (dev
->class == ATA_DEV_ATA
) {
1226 tf
.command
= ATA_CMD_ID_ATA
;
1227 DPRINTK("do ATA identify\n");
1229 tf
.command
= ATA_CMD_ID_ATAPI
;
1230 DPRINTK("do ATAPI identify\n");
1233 tf
.protocol
= ATA_PROT_PIO
;
1235 err_mask
= ata_exec_internal(ap
, dev
, &tf
, DMA_FROM_DEVICE
,
1236 dev
->id
, sizeof(dev
->id
));
1239 if (err_mask
& ~AC_ERR_DEV
)
1243 * arg! EDD works for all test cases, but seems to return
1244 * the ATA signature for some ATAPI devices. Until the
1245 * reason for this is found and fixed, we fix up the mess
1246 * here. If IDENTIFY DEVICE returns command aborted
1247 * (as ATAPI devices do), then we issue an
1248 * IDENTIFY PACKET DEVICE.
1250 * ATA software reset (SRST, the default) does not appear
1251 * to have this problem.
1253 if ((using_edd
) && (dev
->class == ATA_DEV_ATA
)) {
1254 u8 err
= tf
.feature
;
1255 if (err
& ATA_ABORTED
) {
1256 dev
->class = ATA_DEV_ATAPI
;
1263 swap_buf_le16(dev
->id
, ATA_ID_WORDS
);
1265 /* print device capabilities */
1266 printk(KERN_DEBUG
"ata%u: dev %u cfg "
1267 "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
1268 ap
->id
, device
, dev
->id
[49],
1269 dev
->id
[82], dev
->id
[83], dev
->id
[84],
1270 dev
->id
[85], dev
->id
[86], dev
->id
[87],
1274 * common ATA, ATAPI feature tests
1277 /* we require DMA support (bits 8 of word 49) */
1278 if (!ata_id_has_dma(dev
->id
)) {
1279 printk(KERN_DEBUG
"ata%u: no dma\n", ap
->id
);
1283 /* quick-n-dirty find max transfer mode; for printk only */
1284 xfer_modes
= dev
->id
[ATA_ID_UDMA_MODES
];
1286 xfer_modes
= (dev
->id
[ATA_ID_MWDMA_MODES
]) << ATA_SHIFT_MWDMA
;
1288 xfer_modes
= ata_pio_modes(dev
);
1292 /* ATA-specific feature tests */
1293 if (dev
->class == ATA_DEV_ATA
) {
1294 if (!ata_id_is_ata(dev
->id
)) /* sanity check */
1297 /* get major version */
1298 tmp
= dev
->id
[ATA_ID_MAJOR_VER
];
1299 for (major_version
= 14; major_version
>= 1; major_version
--)
1300 if (tmp
& (1 << major_version
))
1304 * The exact sequence expected by certain pre-ATA4 drives is:
1307 * INITIALIZE DEVICE PARAMETERS
1309 * Some drives were very specific about that exact sequence.
1311 if (major_version
< 4 || (!ata_id_has_lba(dev
->id
))) {
1312 ata_dev_init_params(ap
, dev
);
1314 /* current CHS translation info (id[53-58]) might be
1315 * changed. reread the identify device info.
1317 ata_dev_reread_id(ap
, dev
);
1320 if (ata_id_has_lba(dev
->id
)) {
1321 dev
->flags
|= ATA_DFLAG_LBA
;
1323 if (ata_id_has_lba48(dev
->id
)) {
1324 dev
->flags
|= ATA_DFLAG_LBA48
;
1325 dev
->n_sectors
= ata_id_u64(dev
->id
, 100);
1327 dev
->n_sectors
= ata_id_u32(dev
->id
, 60);
1330 /* print device info to dmesg */
1331 printk(KERN_INFO
"ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n",
1334 ata_mode_string(xfer_modes
),
1335 (unsigned long long)dev
->n_sectors
,
1336 dev
->flags
& ATA_DFLAG_LBA48
? " LBA48" : " LBA");
1340 /* Default translation */
1341 dev
->cylinders
= dev
->id
[1];
1342 dev
->heads
= dev
->id
[3];
1343 dev
->sectors
= dev
->id
[6];
1344 dev
->n_sectors
= dev
->cylinders
* dev
->heads
* dev
->sectors
;
1346 if (ata_id_current_chs_valid(dev
->id
)) {
1347 /* Current CHS translation is valid. */
1348 dev
->cylinders
= dev
->id
[54];
1349 dev
->heads
= dev
->id
[55];
1350 dev
->sectors
= dev
->id
[56];
1352 dev
->n_sectors
= ata_id_u32(dev
->id
, 57);
1355 /* print device info to dmesg */
1356 printk(KERN_INFO
"ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n",
1359 ata_mode_string(xfer_modes
),
1360 (unsigned long long)dev
->n_sectors
,
1361 (int)dev
->cylinders
, (int)dev
->heads
, (int)dev
->sectors
);
1365 ap
->host
->max_cmd_len
= 16;
1368 /* ATAPI-specific feature tests */
1369 else if (dev
->class == ATA_DEV_ATAPI
) {
1370 if (ata_id_is_ata(dev
->id
)) /* sanity check */
1373 rc
= atapi_cdb_len(dev
->id
);
1374 if ((rc
< 12) || (rc
> ATAPI_CDB_LEN
)) {
1375 printk(KERN_WARNING
"ata%u: unsupported CDB len\n", ap
->id
);
1378 ap
->cdb_len
= (unsigned int) rc
;
1379 ap
->host
->max_cmd_len
= (unsigned char) ap
->cdb_len
;
1381 /* print device info to dmesg */
1382 printk(KERN_INFO
"ata%u: dev %u ATAPI, max %s\n",
1384 ata_mode_string(xfer_modes
));
1387 DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap
));
1391 printk(KERN_WARNING
"ata%u: dev %u not supported, ignoring\n",
1394 dev
->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */
1395 DPRINTK("EXIT, err\n");
1399 static inline u8
ata_dev_knobble(const struct ata_port
*ap
)
1401 return ((ap
->cbl
== ATA_CBL_SATA
) && (!ata_id_is_sata(ap
->device
->id
)));
1405 * ata_dev_config - Run device specific handlers and check for
1406 * SATA->PATA bridges
1413 void ata_dev_config(struct ata_port
*ap
, unsigned int i
)
1415 /* limit bridge transfers to udma5, 200 sectors */
1416 if (ata_dev_knobble(ap
)) {
1417 printk(KERN_INFO
"ata%u(%u): applying bridge limits\n",
1418 ap
->id
, ap
->device
->devno
);
1419 ap
->udma_mask
&= ATA_UDMA5
;
1420 ap
->host
->max_sectors
= ATA_MAX_SECTORS
;
1421 ap
->host
->hostt
->max_sectors
= ATA_MAX_SECTORS
;
1422 ap
->device
->flags
|= ATA_DFLAG_LOCK_SECTORS
;
1425 if (ap
->ops
->dev_config
)
1426 ap
->ops
->dev_config(ap
, &ap
->device
[i
]);
1430 * ata_bus_probe - Reset and probe ATA bus
1433 * Master ATA bus probing function. Initiates a hardware-dependent
1434 * bus reset, then attempts to identify any devices found on
1438 * PCI/etc. bus probe sem.
1441 * Zero on success, non-zero on error.
1444 static int ata_bus_probe(struct ata_port
*ap
)
1446 unsigned int i
, found
= 0;
1448 ap
->ops
->phy_reset(ap
);
1449 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1452 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1453 ata_dev_identify(ap
, i
);
1454 if (ata_dev_present(&ap
->device
[i
])) {
1456 ata_dev_config(ap
,i
);
1460 if ((!found
) || (ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1461 goto err_out_disable
;
1464 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1465 goto err_out_disable
;
1470 ap
->ops
->port_disable(ap
);
1476 * ata_port_probe - Mark port as enabled
1477 * @ap: Port for which we indicate enablement
1479 * Modify @ap data structure such that the system
1480 * thinks that the entire port is enabled.
1482 * LOCKING: host_set lock, or some other form of
1486 void ata_port_probe(struct ata_port
*ap
)
1488 ap
->flags
&= ~ATA_FLAG_PORT_DISABLED
;
1492 * __sata_phy_reset - Wake/reset a low-level SATA PHY
1493 * @ap: SATA port associated with target SATA PHY.
1495 * This function issues commands to standard SATA Sxxx
1496 * PHY registers, to wake up the phy (and device), and
1497 * clear any reset condition.
1500 * PCI/etc. bus probe sem.
1503 void __sata_phy_reset(struct ata_port
*ap
)
1506 unsigned long timeout
= jiffies
+ (HZ
* 5);
1508 if (ap
->flags
& ATA_FLAG_SATA_RESET
) {
1509 /* issue phy wake/reset */
1510 scr_write_flush(ap
, SCR_CONTROL
, 0x301);
1511 /* Couldn't find anything in SATA I/II specs, but
1512 * AHCI-1.1 10.4.2 says at least 1 ms. */
1515 scr_write_flush(ap
, SCR_CONTROL
, 0x300); /* phy wake/clear reset */
1517 /* wait for phy to become ready, if necessary */
1520 sstatus
= scr_read(ap
, SCR_STATUS
);
1521 if ((sstatus
& 0xf) != 1)
1523 } while (time_before(jiffies
, timeout
));
1525 /* TODO: phy layer with polling, timeouts, etc. */
1526 sstatus
= scr_read(ap
, SCR_STATUS
);
1527 if (sata_dev_present(ap
)) {
1531 tmp
= (sstatus
>> 4) & 0xf;
1534 else if (tmp
& (1 << 1))
1537 speed
= "<unknown>";
1538 printk(KERN_INFO
"ata%u: SATA link up %s Gbps (SStatus %X)\n",
1539 ap
->id
, speed
, sstatus
);
1542 printk(KERN_INFO
"ata%u: SATA link down (SStatus %X)\n",
1544 ata_port_disable(ap
);
1547 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1550 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
1551 ata_port_disable(ap
);
1555 ap
->cbl
= ATA_CBL_SATA
;
1559 * sata_phy_reset - Reset SATA bus.
1560 * @ap: SATA port associated with target SATA PHY.
1562 * This function resets the SATA bus, and then probes
1563 * the bus for devices.
1566 * PCI/etc. bus probe sem.
1569 void sata_phy_reset(struct ata_port
*ap
)
1571 __sata_phy_reset(ap
);
1572 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1578 * ata_port_disable - Disable port.
1579 * @ap: Port to be disabled.
1581 * Modify @ap data structure such that the system
1582 * thinks that the entire port is disabled, and should
1583 * never attempt to probe or communicate with devices
1586 * LOCKING: host_set lock, or some other form of
1590 void ata_port_disable(struct ata_port
*ap
)
1592 ap
->device
[0].class = ATA_DEV_NONE
;
1593 ap
->device
[1].class = ATA_DEV_NONE
;
1594 ap
->flags
|= ATA_FLAG_PORT_DISABLED
;
1598 * This mode timing computation functionality is ported over from
1599 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
1602 * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
1603 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
1604 * for PIO 5, which is a nonstandard extension and UDMA6, which
1605 * is currently supported only by Maxtor drives.
1608 static const struct ata_timing ata_timing
[] = {
1610 { XFER_UDMA_6
, 0, 0, 0, 0, 0, 0, 0, 15 },
1611 { XFER_UDMA_5
, 0, 0, 0, 0, 0, 0, 0, 20 },
1612 { XFER_UDMA_4
, 0, 0, 0, 0, 0, 0, 0, 30 },
1613 { XFER_UDMA_3
, 0, 0, 0, 0, 0, 0, 0, 45 },
1615 { XFER_UDMA_2
, 0, 0, 0, 0, 0, 0, 0, 60 },
1616 { XFER_UDMA_1
, 0, 0, 0, 0, 0, 0, 0, 80 },
1617 { XFER_UDMA_0
, 0, 0, 0, 0, 0, 0, 0, 120 },
1619 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */
1621 { XFER_MW_DMA_2
, 25, 0, 0, 0, 70, 25, 120, 0 },
1622 { XFER_MW_DMA_1
, 45, 0, 0, 0, 80, 50, 150, 0 },
1623 { XFER_MW_DMA_0
, 60, 0, 0, 0, 215, 215, 480, 0 },
1625 { XFER_SW_DMA_2
, 60, 0, 0, 0, 120, 120, 240, 0 },
1626 { XFER_SW_DMA_1
, 90, 0, 0, 0, 240, 240, 480, 0 },
1627 { XFER_SW_DMA_0
, 120, 0, 0, 0, 480, 480, 960, 0 },
1629 /* { XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, */
1630 { XFER_PIO_4
, 25, 70, 25, 120, 70, 25, 120, 0 },
1631 { XFER_PIO_3
, 30, 80, 70, 180, 80, 70, 180, 0 },
1633 { XFER_PIO_2
, 30, 290, 40, 330, 100, 90, 240, 0 },
1634 { XFER_PIO_1
, 50, 290, 93, 383, 125, 100, 383, 0 },
1635 { XFER_PIO_0
, 70, 290, 240, 600, 165, 150, 600, 0 },
1637 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */
1642 #define ENOUGH(v,unit) (((v)-1)/(unit)+1)
1643 #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
1645 static void ata_timing_quantize(const struct ata_timing
*t
, struct ata_timing
*q
, int T
, int UT
)
1647 q
->setup
= EZ(t
->setup
* 1000, T
);
1648 q
->act8b
= EZ(t
->act8b
* 1000, T
);
1649 q
->rec8b
= EZ(t
->rec8b
* 1000, T
);
1650 q
->cyc8b
= EZ(t
->cyc8b
* 1000, T
);
1651 q
->active
= EZ(t
->active
* 1000, T
);
1652 q
->recover
= EZ(t
->recover
* 1000, T
);
1653 q
->cycle
= EZ(t
->cycle
* 1000, T
);
1654 q
->udma
= EZ(t
->udma
* 1000, UT
);
1657 void ata_timing_merge(const struct ata_timing
*a
, const struct ata_timing
*b
,
1658 struct ata_timing
*m
, unsigned int what
)
1660 if (what
& ATA_TIMING_SETUP
) m
->setup
= max(a
->setup
, b
->setup
);
1661 if (what
& ATA_TIMING_ACT8B
) m
->act8b
= max(a
->act8b
, b
->act8b
);
1662 if (what
& ATA_TIMING_REC8B
) m
->rec8b
= max(a
->rec8b
, b
->rec8b
);
1663 if (what
& ATA_TIMING_CYC8B
) m
->cyc8b
= max(a
->cyc8b
, b
->cyc8b
);
1664 if (what
& ATA_TIMING_ACTIVE
) m
->active
= max(a
->active
, b
->active
);
1665 if (what
& ATA_TIMING_RECOVER
) m
->recover
= max(a
->recover
, b
->recover
);
1666 if (what
& ATA_TIMING_CYCLE
) m
->cycle
= max(a
->cycle
, b
->cycle
);
1667 if (what
& ATA_TIMING_UDMA
) m
->udma
= max(a
->udma
, b
->udma
);
1670 static const struct ata_timing
* ata_timing_find_mode(unsigned short speed
)
1672 const struct ata_timing
*t
;
1674 for (t
= ata_timing
; t
->mode
!= speed
; t
++)
1675 if (t
->mode
== 0xFF)
1680 int ata_timing_compute(struct ata_device
*adev
, unsigned short speed
,
1681 struct ata_timing
*t
, int T
, int UT
)
1683 const struct ata_timing
*s
;
1684 struct ata_timing p
;
1690 if (!(s
= ata_timing_find_mode(speed
)))
1693 memcpy(t
, s
, sizeof(*s
));
1696 * If the drive is an EIDE drive, it can tell us it needs extended
1697 * PIO/MW_DMA cycle timing.
1700 if (adev
->id
[ATA_ID_FIELD_VALID
] & 2) { /* EIDE drive */
1701 memset(&p
, 0, sizeof(p
));
1702 if(speed
>= XFER_PIO_0
&& speed
<= XFER_SW_DMA_0
) {
1703 if (speed
<= XFER_PIO_2
) p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO
];
1704 else p
.cycle
= p
.cyc8b
= adev
->id
[ATA_ID_EIDE_PIO_IORDY
];
1705 } else if(speed
>= XFER_MW_DMA_0
&& speed
<= XFER_MW_DMA_2
) {
1706 p
.cycle
= adev
->id
[ATA_ID_EIDE_DMA_MIN
];
1708 ata_timing_merge(&p
, t
, t
, ATA_TIMING_CYCLE
| ATA_TIMING_CYC8B
);
1712 * Convert the timing to bus clock counts.
1715 ata_timing_quantize(t
, t
, T
, UT
);
1718 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, S.M.A.R.T
1719 * and some other commands. We have to ensure that the DMA cycle timing is
1720 * slower/equal than the fastest PIO timing.
1723 if (speed
> XFER_PIO_4
) {
1724 ata_timing_compute(adev
, adev
->pio_mode
, &p
, T
, UT
);
1725 ata_timing_merge(&p
, t
, t
, ATA_TIMING_ALL
);
1729 * Lenghten active & recovery time so that cycle time is correct.
1732 if (t
->act8b
+ t
->rec8b
< t
->cyc8b
) {
1733 t
->act8b
+= (t
->cyc8b
- (t
->act8b
+ t
->rec8b
)) / 2;
1734 t
->rec8b
= t
->cyc8b
- t
->act8b
;
1737 if (t
->active
+ t
->recover
< t
->cycle
) {
1738 t
->active
+= (t
->cycle
- (t
->active
+ t
->recover
)) / 2;
1739 t
->recover
= t
->cycle
- t
->active
;
1745 static const struct {
1748 } xfer_mode_classes
[] = {
1749 { ATA_SHIFT_UDMA
, XFER_UDMA_0
},
1750 { ATA_SHIFT_MWDMA
, XFER_MW_DMA_0
},
1751 { ATA_SHIFT_PIO
, XFER_PIO_0
},
1754 static u8
base_from_shift(unsigned int shift
)
1758 for (i
= 0; i
< ARRAY_SIZE(xfer_mode_classes
); i
++)
1759 if (xfer_mode_classes
[i
].shift
== shift
)
1760 return xfer_mode_classes
[i
].base
;
1765 static void ata_dev_set_mode(struct ata_port
*ap
, struct ata_device
*dev
)
1770 if (!ata_dev_present(dev
) || (ap
->flags
& ATA_FLAG_PORT_DISABLED
))
1773 if (dev
->xfer_shift
== ATA_SHIFT_PIO
)
1774 dev
->flags
|= ATA_DFLAG_PIO
;
1776 ata_dev_set_xfermode(ap
, dev
);
1778 base
= base_from_shift(dev
->xfer_shift
);
1779 ofs
= dev
->xfer_mode
- base
;
1780 idx
= ofs
+ dev
->xfer_shift
;
1781 WARN_ON(idx
>= ARRAY_SIZE(xfer_mode_str
));
1783 DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n",
1784 idx
, dev
->xfer_shift
, (int)dev
->xfer_mode
, (int)base
, ofs
);
1786 printk(KERN_INFO
"ata%u: dev %u configured for %s\n",
1787 ap
->id
, dev
->devno
, xfer_mode_str
[idx
]);
1790 static int ata_host_set_pio(struct ata_port
*ap
)
1796 mask
= ata_get_mode_mask(ap
, ATA_SHIFT_PIO
);
1799 printk(KERN_WARNING
"ata%u: no PIO support\n", ap
->id
);
1803 base
= base_from_shift(ATA_SHIFT_PIO
);
1804 xfer_mode
= base
+ x
;
1806 DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n",
1807 (int)base
, (int)xfer_mode
, mask
, x
);
1809 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1810 struct ata_device
*dev
= &ap
->device
[i
];
1811 if (ata_dev_present(dev
)) {
1812 dev
->pio_mode
= xfer_mode
;
1813 dev
->xfer_mode
= xfer_mode
;
1814 dev
->xfer_shift
= ATA_SHIFT_PIO
;
1815 if (ap
->ops
->set_piomode
)
1816 ap
->ops
->set_piomode(ap
, dev
);
1823 static void ata_host_set_dma(struct ata_port
*ap
, u8 xfer_mode
,
1824 unsigned int xfer_shift
)
1828 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++) {
1829 struct ata_device
*dev
= &ap
->device
[i
];
1830 if (ata_dev_present(dev
)) {
1831 dev
->dma_mode
= xfer_mode
;
1832 dev
->xfer_mode
= xfer_mode
;
1833 dev
->xfer_shift
= xfer_shift
;
1834 if (ap
->ops
->set_dmamode
)
1835 ap
->ops
->set_dmamode(ap
, dev
);
1841 * ata_set_mode - Program timings and issue SET FEATURES - XFER
1842 * @ap: port on which timings will be programmed
1844 * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
1847 * PCI/etc. bus probe sem.
1850 static void ata_set_mode(struct ata_port
*ap
)
1852 unsigned int xfer_shift
;
1856 /* step 1: always set host PIO timings */
1857 rc
= ata_host_set_pio(ap
);
1861 /* step 2: choose the best data xfer mode */
1862 xfer_mode
= xfer_shift
= 0;
1863 rc
= ata_choose_xfer_mode(ap
, &xfer_mode
, &xfer_shift
);
1867 /* step 3: if that xfer mode isn't PIO, set host DMA timings */
1868 if (xfer_shift
!= ATA_SHIFT_PIO
)
1869 ata_host_set_dma(ap
, xfer_mode
, xfer_shift
);
1871 /* step 4: update devices' xfer mode */
1872 ata_dev_set_mode(ap
, &ap
->device
[0]);
1873 ata_dev_set_mode(ap
, &ap
->device
[1]);
1875 if (ap
->flags
& ATA_FLAG_PORT_DISABLED
)
1878 if (ap
->ops
->post_set_mode
)
1879 ap
->ops
->post_set_mode(ap
);
1884 ata_port_disable(ap
);
1888 * ata_busy_sleep - sleep until BSY clears, or timeout
1889 * @ap: port containing status register to be polled
1890 * @tmout_pat: impatience timeout
1891 * @tmout: overall timeout
1893 * Sleep until ATA Status register bit BSY clears,
1894 * or a timeout occurs.
1900 static unsigned int ata_busy_sleep (struct ata_port
*ap
,
1901 unsigned long tmout_pat
,
1902 unsigned long tmout
)
1904 unsigned long timer_start
, timeout
;
1907 status
= ata_busy_wait(ap
, ATA_BUSY
, 300);
1908 timer_start
= jiffies
;
1909 timeout
= timer_start
+ tmout_pat
;
1910 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1912 status
= ata_busy_wait(ap
, ATA_BUSY
, 3);
1915 if (status
& ATA_BUSY
)
1916 printk(KERN_WARNING
"ata%u is slow to respond, "
1917 "please be patient\n", ap
->id
);
1919 timeout
= timer_start
+ tmout
;
1920 while ((status
& ATA_BUSY
) && (time_before(jiffies
, timeout
))) {
1922 status
= ata_chk_status(ap
);
1925 if (status
& ATA_BUSY
) {
1926 printk(KERN_ERR
"ata%u failed to respond (%lu secs)\n",
1927 ap
->id
, tmout
/ HZ
);
1934 static void ata_bus_post_reset(struct ata_port
*ap
, unsigned int devmask
)
1936 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
1937 unsigned int dev0
= devmask
& (1 << 0);
1938 unsigned int dev1
= devmask
& (1 << 1);
1939 unsigned long timeout
;
1941 /* if device 0 was found in ata_devchk, wait for its
1945 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1947 /* if device 1 was found in ata_devchk, wait for
1948 * register access, then wait for BSY to clear
1950 timeout
= jiffies
+ ATA_TMOUT_BOOT
;
1954 ap
->ops
->dev_select(ap
, 1);
1955 if (ap
->flags
& ATA_FLAG_MMIO
) {
1956 nsect
= readb((void __iomem
*) ioaddr
->nsect_addr
);
1957 lbal
= readb((void __iomem
*) ioaddr
->lbal_addr
);
1959 nsect
= inb(ioaddr
->nsect_addr
);
1960 lbal
= inb(ioaddr
->lbal_addr
);
1962 if ((nsect
== 1) && (lbal
== 1))
1964 if (time_after(jiffies
, timeout
)) {
1968 msleep(50); /* give drive a breather */
1971 ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
1973 /* is all this really necessary? */
1974 ap
->ops
->dev_select(ap
, 0);
1976 ap
->ops
->dev_select(ap
, 1);
1978 ap
->ops
->dev_select(ap
, 0);
1982 * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
1983 * @ap: Port to reset and probe
1985 * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
1986 * probe the bus. Not often used these days.
1989 * PCI/etc. bus probe sem.
1990 * Obtains host_set lock.
1994 static unsigned int ata_bus_edd(struct ata_port
*ap
)
1996 struct ata_taskfile tf
;
1997 unsigned long flags
;
1999 /* set up execute-device-diag (bus reset) taskfile */
2000 /* also, take interrupts to a known state (disabled) */
2001 DPRINTK("execute-device-diag\n");
2002 ata_tf_init(ap
, &tf
, 0);
2004 tf
.command
= ATA_CMD_EDD
;
2005 tf
.protocol
= ATA_PROT_NODATA
;
2008 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2009 ata_tf_to_host(ap
, &tf
);
2010 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2012 /* spec says at least 2ms. but who knows with those
2013 * crazy ATAPI devices...
2017 return ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
);
2020 static unsigned int ata_bus_softreset(struct ata_port
*ap
,
2021 unsigned int devmask
)
2023 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2025 DPRINTK("ata%u: bus reset via SRST\n", ap
->id
);
2027 /* software reset. causes dev0 to be selected */
2028 if (ap
->flags
& ATA_FLAG_MMIO
) {
2029 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2030 udelay(20); /* FIXME: flush */
2031 writeb(ap
->ctl
| ATA_SRST
, (void __iomem
*) ioaddr
->ctl_addr
);
2032 udelay(20); /* FIXME: flush */
2033 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2035 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2037 outb(ap
->ctl
| ATA_SRST
, ioaddr
->ctl_addr
);
2039 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2042 /* spec mandates ">= 2ms" before checking status.
2043 * We wait 150ms, because that was the magic delay used for
2044 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
2045 * between when the ATA command register is written, and then
2046 * status is checked. Because waiting for "a while" before
2047 * checking status is fine, post SRST, we perform this magic
2048 * delay here as well.
2052 ata_bus_post_reset(ap
, devmask
);
2058 * ata_bus_reset - reset host port and associated ATA channel
2059 * @ap: port to reset
2061 * This is typically the first time we actually start issuing
2062 * commands to the ATA channel. We wait for BSY to clear, then
2063 * issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
2064 * result. Determine what devices, if any, are on the channel
2065 * by looking at the device 0/1 error register. Look at the signature
2066 * stored in each device's taskfile registers, to determine if
2067 * the device is ATA or ATAPI.
2070 * PCI/etc. bus probe sem.
2071 * Obtains host_set lock.
2074 * Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
2077 void ata_bus_reset(struct ata_port
*ap
)
2079 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
2080 unsigned int slave_possible
= ap
->flags
& ATA_FLAG_SLAVE_POSS
;
2082 unsigned int dev0
, dev1
= 0, rc
= 0, devmask
= 0;
2084 DPRINTK("ENTER, host %u, port %u\n", ap
->id
, ap
->port_no
);
2086 /* determine if device 0/1 are present */
2087 if (ap
->flags
& ATA_FLAG_SATA_RESET
)
2090 dev0
= ata_devchk(ap
, 0);
2092 dev1
= ata_devchk(ap
, 1);
2096 devmask
|= (1 << 0);
2098 devmask
|= (1 << 1);
2100 /* select device 0 again */
2101 ap
->ops
->dev_select(ap
, 0);
2103 /* issue bus reset */
2104 if (ap
->flags
& ATA_FLAG_SRST
)
2105 rc
= ata_bus_softreset(ap
, devmask
);
2106 else if ((ap
->flags
& ATA_FLAG_SATA_RESET
) == 0) {
2107 /* set up device control */
2108 if (ap
->flags
& ATA_FLAG_MMIO
)
2109 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2111 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2112 rc
= ata_bus_edd(ap
);
2119 * determine by signature whether we have ATA or ATAPI devices
2121 err
= ata_dev_try_classify(ap
, 0);
2122 if ((slave_possible
) && (err
!= 0x81))
2123 ata_dev_try_classify(ap
, 1);
2125 /* re-enable interrupts */
2126 if (ap
->ioaddr
.ctl_addr
) /* FIXME: hack. create a hook instead */
2129 /* is double-select really necessary? */
2130 if (ap
->device
[1].class != ATA_DEV_NONE
)
2131 ap
->ops
->dev_select(ap
, 1);
2132 if (ap
->device
[0].class != ATA_DEV_NONE
)
2133 ap
->ops
->dev_select(ap
, 0);
2135 /* if no devices were detected, disable this port */
2136 if ((ap
->device
[0].class == ATA_DEV_NONE
) &&
2137 (ap
->device
[1].class == ATA_DEV_NONE
))
2140 if (ap
->flags
& (ATA_FLAG_SATA_RESET
| ATA_FLAG_SRST
)) {
2141 /* set up device control for ATA_FLAG_SATA_RESET */
2142 if (ap
->flags
& ATA_FLAG_MMIO
)
2143 writeb(ap
->ctl
, (void __iomem
*) ioaddr
->ctl_addr
);
2145 outb(ap
->ctl
, ioaddr
->ctl_addr
);
2152 printk(KERN_ERR
"ata%u: disabling port\n", ap
->id
);
2153 ap
->ops
->port_disable(ap
);
2158 static void ata_pr_blacklisted(const struct ata_port
*ap
,
2159 const struct ata_device
*dev
)
2161 printk(KERN_WARNING
"ata%u: dev %u is on DMA blacklist, disabling DMA\n",
2162 ap
->id
, dev
->devno
);
2165 static const char * const ata_dma_blacklist
[] = {
2184 "Toshiba CD-ROM XM-6202B",
2185 "TOSHIBA CD-ROM XM-1702BC",
2187 "E-IDE CD-ROM CR-840",
2190 "SAMSUNG CD-ROM SC-148C",
2191 "SAMSUNG CD-ROM SC",
2193 "ATAPI CD-ROM DRIVE 40X MAXIMUM",
2197 static int ata_dma_blacklisted(const struct ata_device
*dev
)
2199 unsigned char model_num
[40];
2204 ata_dev_id_string(dev
->id
, model_num
, ATA_ID_PROD_OFS
,
2207 len
= strnlen(s
, sizeof(model_num
));
2209 /* ATAPI specifies that empty space is blank-filled; remove blanks */
2210 while ((len
> 0) && (s
[len
- 1] == ' ')) {
2215 for (i
= 0; i
< ARRAY_SIZE(ata_dma_blacklist
); i
++)
2216 if (!strncmp(ata_dma_blacklist
[i
], s
, len
))
2222 static unsigned int ata_get_mode_mask(const struct ata_port
*ap
, int shift
)
2224 const struct ata_device
*master
, *slave
;
2227 master
= &ap
->device
[0];
2228 slave
= &ap
->device
[1];
2230 assert (ata_dev_present(master
) || ata_dev_present(slave
));
2232 if (shift
== ATA_SHIFT_UDMA
) {
2233 mask
= ap
->udma_mask
;
2234 if (ata_dev_present(master
)) {
2235 mask
&= (master
->id
[ATA_ID_UDMA_MODES
] & 0xff);
2236 if (ata_dma_blacklisted(master
)) {
2238 ata_pr_blacklisted(ap
, master
);
2241 if (ata_dev_present(slave
)) {
2242 mask
&= (slave
->id
[ATA_ID_UDMA_MODES
] & 0xff);
2243 if (ata_dma_blacklisted(slave
)) {
2245 ata_pr_blacklisted(ap
, slave
);
2249 else if (shift
== ATA_SHIFT_MWDMA
) {
2250 mask
= ap
->mwdma_mask
;
2251 if (ata_dev_present(master
)) {
2252 mask
&= (master
->id
[ATA_ID_MWDMA_MODES
] & 0x07);
2253 if (ata_dma_blacklisted(master
)) {
2255 ata_pr_blacklisted(ap
, master
);
2258 if (ata_dev_present(slave
)) {
2259 mask
&= (slave
->id
[ATA_ID_MWDMA_MODES
] & 0x07);
2260 if (ata_dma_blacklisted(slave
)) {
2262 ata_pr_blacklisted(ap
, slave
);
2266 else if (shift
== ATA_SHIFT_PIO
) {
2267 mask
= ap
->pio_mask
;
2268 if (ata_dev_present(master
)) {
2269 /* spec doesn't return explicit support for
2270 * PIO0-2, so we fake it
2272 u16 tmp_mode
= master
->id
[ATA_ID_PIO_MODES
] & 0x03;
2277 if (ata_dev_present(slave
)) {
2278 /* spec doesn't return explicit support for
2279 * PIO0-2, so we fake it
2281 u16 tmp_mode
= slave
->id
[ATA_ID_PIO_MODES
] & 0x03;
2288 mask
= 0xffffffff; /* shut up compiler warning */
2295 /* find greatest bit */
2296 static int fgb(u32 bitmap
)
2301 for (i
= 0; i
< 32; i
++)
2302 if (bitmap
& (1 << i
))
2309 * ata_choose_xfer_mode - attempt to find best transfer mode
2310 * @ap: Port for which an xfer mode will be selected
2311 * @xfer_mode_out: (output) SET FEATURES - XFER MODE code
2312 * @xfer_shift_out: (output) bit shift that selects this mode
2314 * Based on host and device capabilities, determine the
2315 * maximum transfer mode that is amenable to all.
2318 * PCI/etc. bus probe sem.
2321 * Zero on success, negative on error.
2324 static int ata_choose_xfer_mode(const struct ata_port
*ap
,
2326 unsigned int *xfer_shift_out
)
2328 unsigned int mask
, shift
;
2331 for (i
= 0; i
< ARRAY_SIZE(xfer_mode_classes
); i
++) {
2332 shift
= xfer_mode_classes
[i
].shift
;
2333 mask
= ata_get_mode_mask(ap
, shift
);
2337 *xfer_mode_out
= xfer_mode_classes
[i
].base
+ x
;
2338 *xfer_shift_out
= shift
;
2347 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
2348 * @ap: Port associated with device @dev
2349 * @dev: Device to which command will be sent
2351 * Issue SET FEATURES - XFER MODE command to device @dev
2355 * PCI/etc. bus probe sem.
2358 static void ata_dev_set_xfermode(struct ata_port
*ap
, struct ata_device
*dev
)
2360 struct ata_taskfile tf
;
2362 /* set up set-features taskfile */
2363 DPRINTK("set features - xfer mode\n");
2365 ata_tf_init(ap
, &tf
, dev
->devno
);
2366 tf
.command
= ATA_CMD_SET_FEATURES
;
2367 tf
.feature
= SETFEATURES_XFER
;
2368 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2369 tf
.protocol
= ATA_PROT_NODATA
;
2370 tf
.nsect
= dev
->xfer_mode
;
2372 if (ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0)) {
2373 printk(KERN_ERR
"ata%u: failed to set xfermode, disabled\n",
2375 ata_port_disable(ap
);
2382 * ata_dev_reread_id - Reread the device identify device info
2383 * @ap: port where the device is
2384 * @dev: device to reread the identify device info
2389 static void ata_dev_reread_id(struct ata_port
*ap
, struct ata_device
*dev
)
2391 struct ata_taskfile tf
;
2393 ata_tf_init(ap
, &tf
, dev
->devno
);
2395 if (dev
->class == ATA_DEV_ATA
) {
2396 tf
.command
= ATA_CMD_ID_ATA
;
2397 DPRINTK("do ATA identify\n");
2399 tf
.command
= ATA_CMD_ID_ATAPI
;
2400 DPRINTK("do ATAPI identify\n");
2403 tf
.flags
|= ATA_TFLAG_DEVICE
;
2404 tf
.protocol
= ATA_PROT_PIO
;
2406 if (ata_exec_internal(ap
, dev
, &tf
, DMA_FROM_DEVICE
,
2407 dev
->id
, sizeof(dev
->id
)))
2410 swap_buf_le16(dev
->id
, ATA_ID_WORDS
);
2418 printk(KERN_ERR
"ata%u: failed to reread ID, disabled\n", ap
->id
);
2419 ata_port_disable(ap
);
2423 * ata_dev_init_params - Issue INIT DEV PARAMS command
2424 * @ap: Port associated with device @dev
2425 * @dev: Device to which command will be sent
2430 static void ata_dev_init_params(struct ata_port
*ap
, struct ata_device
*dev
)
2432 struct ata_taskfile tf
;
2433 u16 sectors
= dev
->id
[6];
2434 u16 heads
= dev
->id
[3];
2436 /* Number of sectors per track 1-255. Number of heads 1-16 */
2437 if (sectors
< 1 || sectors
> 255 || heads
< 1 || heads
> 16)
2440 /* set up init dev params taskfile */
2441 DPRINTK("init dev params \n");
2443 ata_tf_init(ap
, &tf
, dev
->devno
);
2444 tf
.command
= ATA_CMD_INIT_DEV_PARAMS
;
2445 tf
.flags
|= ATA_TFLAG_ISADDR
| ATA_TFLAG_DEVICE
;
2446 tf
.protocol
= ATA_PROT_NODATA
;
2448 tf
.device
|= (heads
- 1) & 0x0f; /* max head = num. of heads - 1 */
2450 if (ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0)) {
2451 printk(KERN_ERR
"ata%u: failed to init parameters, disabled\n",
2453 ata_port_disable(ap
);
2460 * ata_sg_clean - Unmap DMA memory associated with command
2461 * @qc: Command containing DMA memory to be released
2463 * Unmap all mapped DMA memory associated with this command.
2466 * spin_lock_irqsave(host_set lock)
2469 static void ata_sg_clean(struct ata_queued_cmd
*qc
)
2471 struct ata_port
*ap
= qc
->ap
;
2472 struct scatterlist
*sg
= qc
->__sg
;
2473 int dir
= qc
->dma_dir
;
2474 void *pad_buf
= NULL
;
2476 assert(qc
->flags
& ATA_QCFLAG_DMAMAP
);
2479 if (qc
->flags
& ATA_QCFLAG_SINGLE
)
2480 assert(qc
->n_elem
== 1);
2482 VPRINTK("unmapping %u sg elements\n", qc
->n_elem
);
2484 /* if we padded the buffer out to 32-bit bound, and data
2485 * xfer direction is from-device, we must copy from the
2486 * pad buffer back into the supplied buffer
2488 if (qc
->pad_len
&& !(qc
->tf
.flags
& ATA_TFLAG_WRITE
))
2489 pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2491 if (qc
->flags
& ATA_QCFLAG_SG
) {
2493 dma_unmap_sg(ap
->host_set
->dev
, sg
, qc
->n_elem
, dir
);
2494 /* restore last sg */
2495 sg
[qc
->orig_n_elem
- 1].length
+= qc
->pad_len
;
2497 struct scatterlist
*psg
= &qc
->pad_sgent
;
2498 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
2499 memcpy(addr
+ psg
->offset
, pad_buf
, qc
->pad_len
);
2500 kunmap_atomic(addr
, KM_IRQ0
);
2503 if (sg_dma_len(&sg
[0]) > 0)
2504 dma_unmap_single(ap
->host_set
->dev
,
2505 sg_dma_address(&sg
[0]), sg_dma_len(&sg
[0]),
2508 sg
->length
+= qc
->pad_len
;
2510 memcpy(qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
2511 pad_buf
, qc
->pad_len
);
2514 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
2519 * ata_fill_sg - Fill PCI IDE PRD table
2520 * @qc: Metadata associated with taskfile to be transferred
2522 * Fill PCI IDE PRD (scatter-gather) table with segments
2523 * associated with the current disk command.
2526 * spin_lock_irqsave(host_set lock)
2529 static void ata_fill_sg(struct ata_queued_cmd
*qc
)
2531 struct ata_port
*ap
= qc
->ap
;
2532 struct scatterlist
*sg
;
2535 assert(qc
->__sg
!= NULL
);
2536 assert(qc
->n_elem
> 0);
2539 ata_for_each_sg(sg
, qc
) {
2543 /* determine if physical DMA addr spans 64K boundary.
2544 * Note h/w doesn't support 64-bit, so we unconditionally
2545 * truncate dma_addr_t to u32.
2547 addr
= (u32
) sg_dma_address(sg
);
2548 sg_len
= sg_dma_len(sg
);
2551 offset
= addr
& 0xffff;
2553 if ((offset
+ sg_len
) > 0x10000)
2554 len
= 0x10000 - offset
;
2556 ap
->prd
[idx
].addr
= cpu_to_le32(addr
);
2557 ap
->prd
[idx
].flags_len
= cpu_to_le32(len
& 0xffff);
2558 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx
, addr
, len
);
2567 ap
->prd
[idx
- 1].flags_len
|= cpu_to_le32(ATA_PRD_EOT
);
2570 * ata_check_atapi_dma - Check whether ATAPI DMA can be supported
2571 * @qc: Metadata associated with taskfile to check
2573 * Allow low-level driver to filter ATA PACKET commands, returning
2574 * a status indicating whether or not it is OK to use DMA for the
2575 * supplied PACKET command.
2578 * spin_lock_irqsave(host_set lock)
2580 * RETURNS: 0 when ATAPI DMA can be used
2583 int ata_check_atapi_dma(struct ata_queued_cmd
*qc
)
2585 struct ata_port
*ap
= qc
->ap
;
2586 int rc
= 0; /* Assume ATAPI DMA is OK by default */
2588 if (ap
->ops
->check_atapi_dma
)
2589 rc
= ap
->ops
->check_atapi_dma(qc
);
2594 * ata_qc_prep - Prepare taskfile for submission
2595 * @qc: Metadata associated with taskfile to be prepared
2597 * Prepare ATA taskfile for submission.
2600 * spin_lock_irqsave(host_set lock)
2602 void ata_qc_prep(struct ata_queued_cmd
*qc
)
2604 if (!(qc
->flags
& ATA_QCFLAG_DMAMAP
))
2611 * ata_sg_init_one - Associate command with memory buffer
2612 * @qc: Command to be associated
2613 * @buf: Memory buffer
2614 * @buflen: Length of memory buffer, in bytes.
2616 * Initialize the data-related elements of queued_cmd @qc
2617 * to point to a single memory buffer, @buf of byte length @buflen.
2620 * spin_lock_irqsave(host_set lock)
2623 void ata_sg_init_one(struct ata_queued_cmd
*qc
, void *buf
, unsigned int buflen
)
2625 struct scatterlist
*sg
;
2627 qc
->flags
|= ATA_QCFLAG_SINGLE
;
2629 memset(&qc
->sgent
, 0, sizeof(qc
->sgent
));
2630 qc
->__sg
= &qc
->sgent
;
2632 qc
->orig_n_elem
= 1;
2636 sg_init_one(sg
, buf
, buflen
);
2640 * ata_sg_init - Associate command with scatter-gather table.
2641 * @qc: Command to be associated
2642 * @sg: Scatter-gather table.
2643 * @n_elem: Number of elements in s/g table.
2645 * Initialize the data-related elements of queued_cmd @qc
2646 * to point to a scatter-gather table @sg, containing @n_elem
2650 * spin_lock_irqsave(host_set lock)
2653 void ata_sg_init(struct ata_queued_cmd
*qc
, struct scatterlist
*sg
,
2654 unsigned int n_elem
)
2656 qc
->flags
|= ATA_QCFLAG_SG
;
2658 qc
->n_elem
= n_elem
;
2659 qc
->orig_n_elem
= n_elem
;
2663 * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
2664 * @qc: Command with memory buffer to be mapped.
2666 * DMA-map the memory buffer associated with queued_cmd @qc.
2669 * spin_lock_irqsave(host_set lock)
2672 * Zero on success, negative on error.
2675 static int ata_sg_setup_one(struct ata_queued_cmd
*qc
)
2677 struct ata_port
*ap
= qc
->ap
;
2678 int dir
= qc
->dma_dir
;
2679 struct scatterlist
*sg
= qc
->__sg
;
2680 dma_addr_t dma_address
;
2682 /* we must lengthen transfers to end on a 32-bit boundary */
2683 qc
->pad_len
= sg
->length
& 3;
2685 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2686 struct scatterlist
*psg
= &qc
->pad_sgent
;
2688 assert(qc
->dev
->class == ATA_DEV_ATAPI
);
2690 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
2692 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
2693 memcpy(pad_buf
, qc
->buf_virt
+ sg
->length
- qc
->pad_len
,
2696 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2697 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
2699 sg
->length
-= qc
->pad_len
;
2701 DPRINTK("padding done, sg->length=%u pad_len=%u\n",
2702 sg
->length
, qc
->pad_len
);
2706 sg_dma_address(sg
) = 0;
2710 dma_address
= dma_map_single(ap
->host_set
->dev
, qc
->buf_virt
,
2712 if (dma_mapping_error(dma_address
)) {
2714 sg
->length
+= qc
->pad_len
;
2718 sg_dma_address(sg
) = dma_address
;
2720 sg_dma_len(sg
) = sg
->length
;
2722 DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg
),
2723 qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
2729 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
2730 * @qc: Command with scatter-gather table to be mapped.
2732 * DMA-map the scatter-gather table associated with queued_cmd @qc.
2735 * spin_lock_irqsave(host_set lock)
2738 * Zero on success, negative on error.
2742 static int ata_sg_setup(struct ata_queued_cmd
*qc
)
2744 struct ata_port
*ap
= qc
->ap
;
2745 struct scatterlist
*sg
= qc
->__sg
;
2746 struct scatterlist
*lsg
= &sg
[qc
->n_elem
- 1];
2747 int n_elem
, pre_n_elem
, dir
, trim_sg
= 0;
2749 VPRINTK("ENTER, ata%u\n", ap
->id
);
2750 assert(qc
->flags
& ATA_QCFLAG_SG
);
2752 /* we must lengthen transfers to end on a 32-bit boundary */
2753 qc
->pad_len
= lsg
->length
& 3;
2755 void *pad_buf
= ap
->pad
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2756 struct scatterlist
*psg
= &qc
->pad_sgent
;
2757 unsigned int offset
;
2759 assert(qc
->dev
->class == ATA_DEV_ATAPI
);
2761 memset(pad_buf
, 0, ATA_DMA_PAD_SZ
);
2764 * psg->page/offset are used to copy to-be-written
2765 * data in this function or read data in ata_sg_clean.
2767 offset
= lsg
->offset
+ lsg
->length
- qc
->pad_len
;
2768 psg
->page
= nth_page(lsg
->page
, offset
>> PAGE_SHIFT
);
2769 psg
->offset
= offset_in_page(offset
);
2771 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
) {
2772 void *addr
= kmap_atomic(psg
->page
, KM_IRQ0
);
2773 memcpy(pad_buf
, addr
+ psg
->offset
, qc
->pad_len
);
2774 kunmap_atomic(addr
, KM_IRQ0
);
2777 sg_dma_address(psg
) = ap
->pad_dma
+ (qc
->tag
* ATA_DMA_PAD_SZ
);
2778 sg_dma_len(psg
) = ATA_DMA_PAD_SZ
;
2780 lsg
->length
-= qc
->pad_len
;
2781 if (lsg
->length
== 0)
2784 DPRINTK("padding done, sg[%d].length=%u pad_len=%u\n",
2785 qc
->n_elem
- 1, lsg
->length
, qc
->pad_len
);
2788 pre_n_elem
= qc
->n_elem
;
2789 if (trim_sg
&& pre_n_elem
)
2798 n_elem
= dma_map_sg(ap
->host_set
->dev
, sg
, pre_n_elem
, dir
);
2800 /* restore last sg */
2801 lsg
->length
+= qc
->pad_len
;
2805 DPRINTK("%d sg elements mapped\n", n_elem
);
2808 qc
->n_elem
= n_elem
;
2814 * ata_poll_qc_complete - turn irq back on and finish qc
2815 * @qc: Command to complete
2816 * @err_mask: ATA status register content
2819 * None. (grabs host lock)
2822 void ata_poll_qc_complete(struct ata_queued_cmd
*qc
)
2824 struct ata_port
*ap
= qc
->ap
;
2825 unsigned long flags
;
2827 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
2828 ap
->flags
&= ~ATA_FLAG_NOINTR
;
2830 ata_qc_complete(qc
);
2831 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
2836 * @ap: the target ata_port
2839 * None. (executing in kernel thread context)
2842 * timeout value to use
2845 static unsigned long ata_pio_poll(struct ata_port
*ap
)
2847 struct ata_queued_cmd
*qc
;
2849 unsigned int poll_state
= HSM_ST_UNKNOWN
;
2850 unsigned int reg_state
= HSM_ST_UNKNOWN
;
2852 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
2855 switch (ap
->hsm_task_state
) {
2858 poll_state
= HSM_ST_POLL
;
2862 case HSM_ST_LAST_POLL
:
2863 poll_state
= HSM_ST_LAST_POLL
;
2864 reg_state
= HSM_ST_LAST
;
2871 status
= ata_chk_status(ap
);
2872 if (status
& ATA_BUSY
) {
2873 if (time_after(jiffies
, ap
->pio_task_timeout
)) {
2874 qc
->err_mask
|= AC_ERR_ATA_BUS
;
2875 ap
->hsm_task_state
= HSM_ST_TMOUT
;
2878 ap
->hsm_task_state
= poll_state
;
2879 return ATA_SHORT_PAUSE
;
2882 ap
->hsm_task_state
= reg_state
;
2887 * ata_pio_complete - check if drive is busy or idle
2888 * @ap: the target ata_port
2891 * None. (executing in kernel thread context)
2894 * Non-zero if qc completed, zero otherwise.
2897 static int ata_pio_complete (struct ata_port
*ap
)
2899 struct ata_queued_cmd
*qc
;
2903 * This is purely heuristic. This is a fast path. Sometimes when
2904 * we enter, BSY will be cleared in a chk-status or two. If not,
2905 * the drive is probably seeking or something. Snooze for a couple
2906 * msecs, then chk-status again. If still busy, fall back to
2907 * HSM_ST_POLL state.
2909 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
2910 if (drv_stat
& ATA_BUSY
) {
2912 drv_stat
= ata_busy_wait(ap
, ATA_BUSY
, 10);
2913 if (drv_stat
& ATA_BUSY
) {
2914 ap
->hsm_task_state
= HSM_ST_LAST_POLL
;
2915 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
2920 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
2923 drv_stat
= ata_wait_idle(ap
);
2924 if (!ata_ok(drv_stat
)) {
2925 qc
->err_mask
|= __ac_err_mask(drv_stat
);
2926 ap
->hsm_task_state
= HSM_ST_ERR
;
2930 ap
->hsm_task_state
= HSM_ST_IDLE
;
2932 assert(qc
->err_mask
== 0);
2933 ata_poll_qc_complete(qc
);
2935 /* another command may start at this point */
2942 * swap_buf_le16 - swap halves of 16-words in place
2943 * @buf: Buffer to swap
2944 * @buf_words: Number of 16-bit words in buffer.
2946 * Swap halves of 16-bit words if needed to convert from
2947 * little-endian byte order to native cpu byte order, or
2951 * Inherited from caller.
2953 void swap_buf_le16(u16
*buf
, unsigned int buf_words
)
2958 for (i
= 0; i
< buf_words
; i
++)
2959 buf
[i
] = le16_to_cpu(buf
[i
]);
2960 #endif /* __BIG_ENDIAN */
2964 * ata_mmio_data_xfer - Transfer data by MMIO
2965 * @ap: port to read/write
2967 * @buflen: buffer length
2968 * @write_data: read/write
2970 * Transfer data from/to the device data register by MMIO.
2973 * Inherited from caller.
2976 static void ata_mmio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
2977 unsigned int buflen
, int write_data
)
2980 unsigned int words
= buflen
>> 1;
2981 u16
*buf16
= (u16
*) buf
;
2982 void __iomem
*mmio
= (void __iomem
*)ap
->ioaddr
.data_addr
;
2984 /* Transfer multiple of 2 bytes */
2986 for (i
= 0; i
< words
; i
++)
2987 writew(le16_to_cpu(buf16
[i
]), mmio
);
2989 for (i
= 0; i
< words
; i
++)
2990 buf16
[i
] = cpu_to_le16(readw(mmio
));
2993 /* Transfer trailing 1 byte, if any. */
2994 if (unlikely(buflen
& 0x01)) {
2995 u16 align_buf
[1] = { 0 };
2996 unsigned char *trailing_buf
= buf
+ buflen
- 1;
2999 memcpy(align_buf
, trailing_buf
, 1);
3000 writew(le16_to_cpu(align_buf
[0]), mmio
);
3002 align_buf
[0] = cpu_to_le16(readw(mmio
));
3003 memcpy(trailing_buf
, align_buf
, 1);
3009 * ata_pio_data_xfer - Transfer data by PIO
3010 * @ap: port to read/write
3012 * @buflen: buffer length
3013 * @write_data: read/write
3015 * Transfer data from/to the device data register by PIO.
3018 * Inherited from caller.
3021 static void ata_pio_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3022 unsigned int buflen
, int write_data
)
3024 unsigned int words
= buflen
>> 1;
3026 /* Transfer multiple of 2 bytes */
3028 outsw(ap
->ioaddr
.data_addr
, buf
, words
);
3030 insw(ap
->ioaddr
.data_addr
, buf
, words
);
3032 /* Transfer trailing 1 byte, if any. */
3033 if (unlikely(buflen
& 0x01)) {
3034 u16 align_buf
[1] = { 0 };
3035 unsigned char *trailing_buf
= buf
+ buflen
- 1;
3038 memcpy(align_buf
, trailing_buf
, 1);
3039 outw(le16_to_cpu(align_buf
[0]), ap
->ioaddr
.data_addr
);
3041 align_buf
[0] = cpu_to_le16(inw(ap
->ioaddr
.data_addr
));
3042 memcpy(trailing_buf
, align_buf
, 1);
3048 * ata_data_xfer - Transfer data from/to the data register.
3049 * @ap: port to read/write
3051 * @buflen: buffer length
3052 * @do_write: read/write
3054 * Transfer data from/to the device data register.
3057 * Inherited from caller.
3060 static void ata_data_xfer(struct ata_port
*ap
, unsigned char *buf
,
3061 unsigned int buflen
, int do_write
)
3063 if (ap
->flags
& ATA_FLAG_MMIO
)
3064 ata_mmio_data_xfer(ap
, buf
, buflen
, do_write
);
3066 ata_pio_data_xfer(ap
, buf
, buflen
, do_write
);
3070 * ata_pio_sector - Transfer ATA_SECT_SIZE (512 bytes) of data.
3071 * @qc: Command on going
3073 * Transfer ATA_SECT_SIZE of data from/to the ATA device.
3076 * Inherited from caller.
3079 static void ata_pio_sector(struct ata_queued_cmd
*qc
)
3081 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3082 struct scatterlist
*sg
= qc
->__sg
;
3083 struct ata_port
*ap
= qc
->ap
;
3085 unsigned int offset
;
3088 if (qc
->cursect
== (qc
->nsect
- 1))
3089 ap
->hsm_task_state
= HSM_ST_LAST
;
3091 page
= sg
[qc
->cursg
].page
;
3092 offset
= sg
[qc
->cursg
].offset
+ qc
->cursg_ofs
* ATA_SECT_SIZE
;
3094 /* get the current page and offset */
3095 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3096 offset
%= PAGE_SIZE
;
3098 buf
= kmap(page
) + offset
;
3103 if ((qc
->cursg_ofs
* ATA_SECT_SIZE
) == (&sg
[qc
->cursg
])->length
) {
3108 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3110 /* do the actual data transfer */
3111 do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3112 ata_data_xfer(ap
, buf
, ATA_SECT_SIZE
, do_write
);
3118 * __atapi_pio_bytes - Transfer data from/to the ATAPI device.
3119 * @qc: Command on going
3120 * @bytes: number of bytes
3122 * Transfer Transfer data from/to the ATAPI device.
3125 * Inherited from caller.
3129 static void __atapi_pio_bytes(struct ata_queued_cmd
*qc
, unsigned int bytes
)
3131 int do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3132 struct scatterlist
*sg
= qc
->__sg
;
3133 struct ata_port
*ap
= qc
->ap
;
3136 unsigned int offset
, count
;
3138 if (qc
->curbytes
+ bytes
>= qc
->nbytes
)
3139 ap
->hsm_task_state
= HSM_ST_LAST
;
3142 if (unlikely(qc
->cursg
>= qc
->n_elem
)) {
3144 * The end of qc->sg is reached and the device expects
3145 * more data to transfer. In order not to overrun qc->sg
3146 * and fulfill length specified in the byte count register,
3147 * - for read case, discard trailing data from the device
3148 * - for write case, padding zero data to the device
3150 u16 pad_buf
[1] = { 0 };
3151 unsigned int words
= bytes
>> 1;
3154 if (words
) /* warning if bytes > 1 */
3155 printk(KERN_WARNING
"ata%u: %u bytes trailing data\n",
3158 for (i
= 0; i
< words
; i
++)
3159 ata_data_xfer(ap
, (unsigned char*)pad_buf
, 2, do_write
);
3161 ap
->hsm_task_state
= HSM_ST_LAST
;
3165 sg
= &qc
->__sg
[qc
->cursg
];
3168 offset
= sg
->offset
+ qc
->cursg_ofs
;
3170 /* get the current page and offset */
3171 page
= nth_page(page
, (offset
>> PAGE_SHIFT
));
3172 offset
%= PAGE_SIZE
;
3174 /* don't overrun current sg */
3175 count
= min(sg
->length
- qc
->cursg_ofs
, bytes
);
3177 /* don't cross page boundaries */
3178 count
= min(count
, (unsigned int)PAGE_SIZE
- offset
);
3180 buf
= kmap(page
) + offset
;
3183 qc
->curbytes
+= count
;
3184 qc
->cursg_ofs
+= count
;
3186 if (qc
->cursg_ofs
== sg
->length
) {
3191 DPRINTK("data %s\n", qc
->tf
.flags
& ATA_TFLAG_WRITE
? "write" : "read");
3193 /* do the actual data transfer */
3194 ata_data_xfer(ap
, buf
, count
, do_write
);
3203 * atapi_pio_bytes - Transfer data from/to the ATAPI device.
3204 * @qc: Command on going
3206 * Transfer Transfer data from/to the ATAPI device.
3209 * Inherited from caller.
3212 static void atapi_pio_bytes(struct ata_queued_cmd
*qc
)
3214 struct ata_port
*ap
= qc
->ap
;
3215 struct ata_device
*dev
= qc
->dev
;
3216 unsigned int ireason
, bc_lo
, bc_hi
, bytes
;
3217 int i_write
, do_write
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
) ? 1 : 0;
3219 ap
->ops
->tf_read(ap
, &qc
->tf
);
3220 ireason
= qc
->tf
.nsect
;
3221 bc_lo
= qc
->tf
.lbam
;
3222 bc_hi
= qc
->tf
.lbah
;
3223 bytes
= (bc_hi
<< 8) | bc_lo
;
3225 /* shall be cleared to zero, indicating xfer of data */
3226 if (ireason
& (1 << 0))
3229 /* make sure transfer direction matches expected */
3230 i_write
= ((ireason
& (1 << 1)) == 0) ? 1 : 0;
3231 if (do_write
!= i_write
)
3234 __atapi_pio_bytes(qc
, bytes
);
3239 printk(KERN_INFO
"ata%u: dev %u: ATAPI check failed\n",
3240 ap
->id
, dev
->devno
);
3241 qc
->err_mask
|= AC_ERR_ATA_BUS
;
3242 ap
->hsm_task_state
= HSM_ST_ERR
;
3246 * ata_pio_block - start PIO on a block
3247 * @ap: the target ata_port
3250 * None. (executing in kernel thread context)
3253 static void ata_pio_block(struct ata_port
*ap
)
3255 struct ata_queued_cmd
*qc
;
3259 * This is purely heuristic. This is a fast path.
3260 * Sometimes when we enter, BSY will be cleared in
3261 * a chk-status or two. If not, the drive is probably seeking
3262 * or something. Snooze for a couple msecs, then
3263 * chk-status again. If still busy, fall back to
3264 * HSM_ST_POLL state.
3266 status
= ata_busy_wait(ap
, ATA_BUSY
, 5);
3267 if (status
& ATA_BUSY
) {
3269 status
= ata_busy_wait(ap
, ATA_BUSY
, 10);
3270 if (status
& ATA_BUSY
) {
3271 ap
->hsm_task_state
= HSM_ST_POLL
;
3272 ap
->pio_task_timeout
= jiffies
+ ATA_TMOUT_PIO
;
3277 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3281 if (status
& (ATA_ERR
| ATA_DF
)) {
3282 qc
->err_mask
|= AC_ERR_DEV
;
3283 ap
->hsm_task_state
= HSM_ST_ERR
;
3287 /* transfer data if any */
3288 if (is_atapi_taskfile(&qc
->tf
)) {
3289 /* DRQ=0 means no more data to transfer */
3290 if ((status
& ATA_DRQ
) == 0) {
3291 ap
->hsm_task_state
= HSM_ST_LAST
;
3295 atapi_pio_bytes(qc
);
3297 /* handle BSY=0, DRQ=0 as error */
3298 if ((status
& ATA_DRQ
) == 0) {
3299 qc
->err_mask
|= AC_ERR_ATA_BUS
;
3300 ap
->hsm_task_state
= HSM_ST_ERR
;
3308 static void ata_pio_error(struct ata_port
*ap
)
3310 struct ata_queued_cmd
*qc
;
3312 printk(KERN_WARNING
"ata%u: PIO error\n", ap
->id
);
3314 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3317 /* make sure qc->err_mask is available to
3318 * know what's wrong and recover
3320 assert(qc
->err_mask
);
3322 ap
->hsm_task_state
= HSM_ST_IDLE
;
3324 ata_poll_qc_complete(qc
);
3327 static void ata_pio_task(void *_data
)
3329 struct ata_port
*ap
= _data
;
3330 unsigned long timeout
;
3337 switch (ap
->hsm_task_state
) {
3346 qc_completed
= ata_pio_complete(ap
);
3350 case HSM_ST_LAST_POLL
:
3351 timeout
= ata_pio_poll(ap
);
3361 queue_delayed_work(ata_wq
, &ap
->pio_task
, timeout
);
3362 else if (!qc_completed
)
3367 * ata_qc_timeout - Handle timeout of queued command
3368 * @qc: Command that timed out
3370 * Some part of the kernel (currently, only the SCSI layer)
3371 * has noticed that the active command on port @ap has not
3372 * completed after a specified length of time. Handle this
3373 * condition by disabling DMA (if necessary) and completing
3374 * transactions, with error if necessary.
3376 * This also handles the case of the "lost interrupt", where
3377 * for some reason (possibly hardware bug, possibly driver bug)
3378 * an interrupt was not delivered to the driver, even though the
3379 * transaction completed successfully.
3382 * Inherited from SCSI layer (none, can sleep)
3385 static void ata_qc_timeout(struct ata_queued_cmd
*qc
)
3387 struct ata_port
*ap
= qc
->ap
;
3388 struct ata_host_set
*host_set
= ap
->host_set
;
3389 u8 host_stat
= 0, drv_stat
;
3390 unsigned long flags
;
3394 spin_lock_irqsave(&host_set
->lock
, flags
);
3396 /* hack alert! We cannot use the supplied completion
3397 * function from inside the ->eh_strategy_handler() thread.
3398 * libata is the only user of ->eh_strategy_handler() in
3399 * any kernel, so the default scsi_done() assumes it is
3400 * not being called from the SCSI EH.
3402 qc
->scsidone
= scsi_finish_command
;
3404 switch (qc
->tf
.protocol
) {
3407 case ATA_PROT_ATAPI_DMA
:
3408 host_stat
= ap
->ops
->bmdma_status(ap
);
3410 /* before we do anything else, clear DMA-Start bit */
3411 ap
->ops
->bmdma_stop(qc
);
3417 drv_stat
= ata_chk_status(ap
);
3419 /* ack bmdma irq events */
3420 ap
->ops
->irq_clear(ap
);
3422 printk(KERN_ERR
"ata%u: command 0x%x timeout, stat 0x%x host_stat 0x%x\n",
3423 ap
->id
, qc
->tf
.command
, drv_stat
, host_stat
);
3425 /* complete taskfile transaction */
3426 qc
->err_mask
|= ac_err_mask(drv_stat
);
3427 ata_qc_complete(qc
);
3431 spin_unlock_irqrestore(&host_set
->lock
, flags
);
3437 * ata_eng_timeout - Handle timeout of queued command
3438 * @ap: Port on which timed-out command is active
3440 * Some part of the kernel (currently, only the SCSI layer)
3441 * has noticed that the active command on port @ap has not
3442 * completed after a specified length of time. Handle this
3443 * condition by disabling DMA (if necessary) and completing
3444 * transactions, with error if necessary.
3446 * This also handles the case of the "lost interrupt", where
3447 * for some reason (possibly hardware bug, possibly driver bug)
3448 * an interrupt was not delivered to the driver, even though the
3449 * transaction completed successfully.
3452 * Inherited from SCSI layer (none, can sleep)
3455 void ata_eng_timeout(struct ata_port
*ap
)
3457 struct ata_queued_cmd
*qc
;
3461 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
3465 printk(KERN_ERR
"ata%u: BUG: timeout without command\n",
3475 * ata_qc_new - Request an available ATA command, for queueing
3476 * @ap: Port associated with device @dev
3477 * @dev: Device from whom we request an available command structure
3483 static struct ata_queued_cmd
*ata_qc_new(struct ata_port
*ap
)
3485 struct ata_queued_cmd
*qc
= NULL
;
3488 for (i
= 0; i
< ATA_MAX_QUEUE
; i
++)
3489 if (!test_and_set_bit(i
, &ap
->qactive
)) {
3490 qc
= ata_qc_from_tag(ap
, i
);
3501 * ata_qc_new_init - Request an available ATA command, and initialize it
3502 * @ap: Port associated with device @dev
3503 * @dev: Device from whom we request an available command structure
3509 struct ata_queued_cmd
*ata_qc_new_init(struct ata_port
*ap
,
3510 struct ata_device
*dev
)
3512 struct ata_queued_cmd
*qc
;
3514 qc
= ata_qc_new(ap
);
3526 static void __ata_qc_complete(struct ata_queued_cmd
*qc
)
3528 struct ata_port
*ap
= qc
->ap
;
3533 if (likely(ata_tag_valid(tag
))) {
3534 if (tag
== ap
->active_tag
)
3535 ap
->active_tag
= ATA_TAG_POISON
;
3536 qc
->tag
= ATA_TAG_POISON
;
3537 clear_bit(tag
, &ap
->qactive
);
3542 * ata_qc_free - free unused ata_queued_cmd
3543 * @qc: Command to complete
3545 * Designed to free unused ata_queued_cmd object
3546 * in case something prevents using it.
3549 * spin_lock_irqsave(host_set lock)
3551 void ata_qc_free(struct ata_queued_cmd
*qc
)
3553 assert(qc
!= NULL
); /* ata_qc_from_tag _might_ return NULL */
3555 __ata_qc_complete(qc
);
3559 * ata_qc_complete - Complete an active ATA command
3560 * @qc: Command to complete
3561 * @err_mask: ATA Status register contents
3563 * Indicate to the mid and upper layers that an ATA
3564 * command has completed, with either an ok or not-ok status.
3567 * spin_lock_irqsave(host_set lock)
3570 void ata_qc_complete(struct ata_queued_cmd
*qc
)
3574 assert(qc
!= NULL
); /* ata_qc_from_tag _might_ return NULL */
3575 assert(qc
->flags
& ATA_QCFLAG_ACTIVE
);
3577 if (likely(qc
->flags
& ATA_QCFLAG_DMAMAP
))
3580 /* atapi: mark qc as inactive to prevent the interrupt handler
3581 * from completing the command twice later, before the error handler
3582 * is called. (when rc != 0 and atapi request sense is needed)
3584 qc
->flags
&= ~ATA_QCFLAG_ACTIVE
;
3586 /* call completion callback */
3587 rc
= qc
->complete_fn(qc
);
3589 /* if callback indicates not to complete command (non-zero),
3590 * return immediately
3595 __ata_qc_complete(qc
);
3600 static inline int ata_should_dma_map(struct ata_queued_cmd
*qc
)
3602 struct ata_port
*ap
= qc
->ap
;
3604 switch (qc
->tf
.protocol
) {
3606 case ATA_PROT_ATAPI_DMA
:
3609 case ATA_PROT_ATAPI
:
3611 case ATA_PROT_PIO_MULT
:
3612 if (ap
->flags
& ATA_FLAG_PIO_DMA
)
3625 * ata_qc_issue - issue taskfile to device
3626 * @qc: command to issue to device
3628 * Prepare an ATA command to submission to device.
3629 * This includes mapping the data into a DMA-able
3630 * area, filling in the S/G table, and finally
3631 * writing the taskfile to hardware, starting the command.
3634 * spin_lock_irqsave(host_set lock)
3637 * Zero on success, negative on error.
3640 int ata_qc_issue(struct ata_queued_cmd
*qc
)
3642 struct ata_port
*ap
= qc
->ap
;
3644 if (ata_should_dma_map(qc
)) {
3645 if (qc
->flags
& ATA_QCFLAG_SG
) {
3646 if (ata_sg_setup(qc
))
3648 } else if (qc
->flags
& ATA_QCFLAG_SINGLE
) {
3649 if (ata_sg_setup_one(qc
))
3653 qc
->flags
&= ~ATA_QCFLAG_DMAMAP
;
3656 ap
->ops
->qc_prep(qc
);
3658 qc
->ap
->active_tag
= qc
->tag
;
3659 qc
->flags
|= ATA_QCFLAG_ACTIVE
;
3661 return ap
->ops
->qc_issue(qc
);
3669 * ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
3670 * @qc: command to issue to device
3672 * Using various libata functions and hooks, this function
3673 * starts an ATA command. ATA commands are grouped into
3674 * classes called "protocols", and issuing each type of protocol
3675 * is slightly different.
3677 * May be used as the qc_issue() entry in ata_port_operations.
3680 * spin_lock_irqsave(host_set lock)
3683 * Zero on success, negative on error.
3686 int ata_qc_issue_prot(struct ata_queued_cmd
*qc
)
3688 struct ata_port
*ap
= qc
->ap
;
3690 ata_dev_select(ap
, qc
->dev
->devno
, 1, 0);
3692 switch (qc
->tf
.protocol
) {
3693 case ATA_PROT_NODATA
:
3694 ata_tf_to_host(ap
, &qc
->tf
);
3698 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
3699 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
3700 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
3703 case ATA_PROT_PIO
: /* load tf registers, initiate polling pio */
3704 ata_qc_set_polling(qc
);
3705 ata_tf_to_host(ap
, &qc
->tf
);
3706 ap
->hsm_task_state
= HSM_ST
;
3707 queue_work(ata_wq
, &ap
->pio_task
);
3710 case ATA_PROT_ATAPI
:
3711 ata_qc_set_polling(qc
);
3712 ata_tf_to_host(ap
, &qc
->tf
);
3713 queue_work(ata_wq
, &ap
->packet_task
);
3716 case ATA_PROT_ATAPI_NODATA
:
3717 ap
->flags
|= ATA_FLAG_NOINTR
;
3718 ata_tf_to_host(ap
, &qc
->tf
);
3719 queue_work(ata_wq
, &ap
->packet_task
);
3722 case ATA_PROT_ATAPI_DMA
:
3723 ap
->flags
|= ATA_FLAG_NOINTR
;
3724 ap
->ops
->tf_load(ap
, &qc
->tf
); /* load tf registers */
3725 ap
->ops
->bmdma_setup(qc
); /* set up bmdma */
3726 queue_work(ata_wq
, &ap
->packet_task
);
3738 * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
3739 * @qc: Info associated with this ATA transaction.
3742 * spin_lock_irqsave(host_set lock)
3745 static void ata_bmdma_setup_mmio (struct ata_queued_cmd
*qc
)
3747 struct ata_port
*ap
= qc
->ap
;
3748 unsigned int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3750 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3752 /* load PRD table addr. */
3753 mb(); /* make sure PRD table writes are visible to controller */
3754 writel(ap
->prd_dma
, mmio
+ ATA_DMA_TABLE_OFS
);
3756 /* specify data direction, triple-check start bit is clear */
3757 dmactl
= readb(mmio
+ ATA_DMA_CMD
);
3758 dmactl
&= ~(ATA_DMA_WR
| ATA_DMA_START
);
3760 dmactl
|= ATA_DMA_WR
;
3761 writeb(dmactl
, mmio
+ ATA_DMA_CMD
);
3763 /* issue r/w command */
3764 ap
->ops
->exec_command(ap
, &qc
->tf
);
3768 * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
3769 * @qc: Info associated with this ATA transaction.
3772 * spin_lock_irqsave(host_set lock)
3775 static void ata_bmdma_start_mmio (struct ata_queued_cmd
*qc
)
3777 struct ata_port
*ap
= qc
->ap
;
3778 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3781 /* start host DMA transaction */
3782 dmactl
= readb(mmio
+ ATA_DMA_CMD
);
3783 writeb(dmactl
| ATA_DMA_START
, mmio
+ ATA_DMA_CMD
);
3785 /* Strictly, one may wish to issue a readb() here, to
3786 * flush the mmio write. However, control also passes
3787 * to the hardware at this point, and it will interrupt
3788 * us when we are to resume control. So, in effect,
3789 * we don't care when the mmio write flushes.
3790 * Further, a read of the DMA status register _immediately_
3791 * following the write may not be what certain flaky hardware
3792 * is expected, so I think it is best to not add a readb()
3793 * without first all the MMIO ATA cards/mobos.
3794 * Or maybe I'm just being paranoid.
3799 * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO)
3800 * @qc: Info associated with this ATA transaction.
3803 * spin_lock_irqsave(host_set lock)
3806 static void ata_bmdma_setup_pio (struct ata_queued_cmd
*qc
)
3808 struct ata_port
*ap
= qc
->ap
;
3809 unsigned int rw
= (qc
->tf
.flags
& ATA_TFLAG_WRITE
);
3812 /* load PRD table addr. */
3813 outl(ap
->prd_dma
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_TABLE_OFS
);
3815 /* specify data direction, triple-check start bit is clear */
3816 dmactl
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3817 dmactl
&= ~(ATA_DMA_WR
| ATA_DMA_START
);
3819 dmactl
|= ATA_DMA_WR
;
3820 outb(dmactl
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3822 /* issue r/w command */
3823 ap
->ops
->exec_command(ap
, &qc
->tf
);
3827 * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO)
3828 * @qc: Info associated with this ATA transaction.
3831 * spin_lock_irqsave(host_set lock)
3834 static void ata_bmdma_start_pio (struct ata_queued_cmd
*qc
)
3836 struct ata_port
*ap
= qc
->ap
;
3839 /* start host DMA transaction */
3840 dmactl
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3841 outb(dmactl
| ATA_DMA_START
,
3842 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3847 * ata_bmdma_start - Start a PCI IDE BMDMA transaction
3848 * @qc: Info associated with this ATA transaction.
3850 * Writes the ATA_DMA_START flag to the DMA command register.
3852 * May be used as the bmdma_start() entry in ata_port_operations.
3855 * spin_lock_irqsave(host_set lock)
3857 void ata_bmdma_start(struct ata_queued_cmd
*qc
)
3859 if (qc
->ap
->flags
& ATA_FLAG_MMIO
)
3860 ata_bmdma_start_mmio(qc
);
3862 ata_bmdma_start_pio(qc
);
3867 * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
3868 * @qc: Info associated with this ATA transaction.
3870 * Writes address of PRD table to device's PRD Table Address
3871 * register, sets the DMA control register, and calls
3872 * ops->exec_command() to start the transfer.
3874 * May be used as the bmdma_setup() entry in ata_port_operations.
3877 * spin_lock_irqsave(host_set lock)
3879 void ata_bmdma_setup(struct ata_queued_cmd
*qc
)
3881 if (qc
->ap
->flags
& ATA_FLAG_MMIO
)
3882 ata_bmdma_setup_mmio(qc
);
3884 ata_bmdma_setup_pio(qc
);
3889 * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
3890 * @ap: Port associated with this ATA transaction.
3892 * Clear interrupt and error flags in DMA status register.
3894 * May be used as the irq_clear() entry in ata_port_operations.
3897 * spin_lock_irqsave(host_set lock)
3900 void ata_bmdma_irq_clear(struct ata_port
*ap
)
3902 if (ap
->flags
& ATA_FLAG_MMIO
) {
3903 void __iomem
*mmio
= ((void __iomem
*) ap
->ioaddr
.bmdma_addr
) + ATA_DMA_STATUS
;
3904 writeb(readb(mmio
), mmio
);
3906 unsigned long addr
= ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
;
3907 outb(inb(addr
), addr
);
3914 * ata_bmdma_status - Read PCI IDE BMDMA status
3915 * @ap: Port associated with this ATA transaction.
3917 * Read and return BMDMA status register.
3919 * May be used as the bmdma_status() entry in ata_port_operations.
3922 * spin_lock_irqsave(host_set lock)
3925 u8
ata_bmdma_status(struct ata_port
*ap
)
3928 if (ap
->flags
& ATA_FLAG_MMIO
) {
3929 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3930 host_stat
= readb(mmio
+ ATA_DMA_STATUS
);
3932 host_stat
= inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
3938 * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
3939 * @qc: Command we are ending DMA for
3941 * Clears the ATA_DMA_START flag in the dma control register
3943 * May be used as the bmdma_stop() entry in ata_port_operations.
3946 * spin_lock_irqsave(host_set lock)
3949 void ata_bmdma_stop(struct ata_queued_cmd
*qc
)
3951 struct ata_port
*ap
= qc
->ap
;
3952 if (ap
->flags
& ATA_FLAG_MMIO
) {
3953 void __iomem
*mmio
= (void __iomem
*) ap
->ioaddr
.bmdma_addr
;
3955 /* clear start/stop bit */
3956 writeb(readb(mmio
+ ATA_DMA_CMD
) & ~ATA_DMA_START
,
3957 mmio
+ ATA_DMA_CMD
);
3959 /* clear start/stop bit */
3960 outb(inb(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
) & ~ATA_DMA_START
,
3961 ap
->ioaddr
.bmdma_addr
+ ATA_DMA_CMD
);
3964 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
3965 ata_altstatus(ap
); /* dummy read */
3969 * ata_host_intr - Handle host interrupt for given (port, task)
3970 * @ap: Port on which interrupt arrived (possibly...)
3971 * @qc: Taskfile currently active in engine
3973 * Handle host interrupt for given queued command. Currently,
3974 * only DMA interrupts are handled. All other commands are
3975 * handled via polling with interrupts disabled (nIEN bit).
3978 * spin_lock_irqsave(host_set lock)
3981 * One if interrupt was handled, zero if not (shared irq).
3984 inline unsigned int ata_host_intr (struct ata_port
*ap
,
3985 struct ata_queued_cmd
*qc
)
3987 u8 status
, host_stat
;
3989 switch (qc
->tf
.protocol
) {
3992 case ATA_PROT_ATAPI_DMA
:
3993 case ATA_PROT_ATAPI
:
3994 /* check status of DMA engine */
3995 host_stat
= ap
->ops
->bmdma_status(ap
);
3996 VPRINTK("ata%u: host_stat 0x%X\n", ap
->id
, host_stat
);
3998 /* if it's not our irq... */
3999 if (!(host_stat
& ATA_DMA_INTR
))
4002 /* before we do anything else, clear DMA-Start bit */
4003 ap
->ops
->bmdma_stop(qc
);
4007 case ATA_PROT_ATAPI_NODATA
:
4008 case ATA_PROT_NODATA
:
4009 /* check altstatus */
4010 status
= ata_altstatus(ap
);
4011 if (status
& ATA_BUSY
)
4014 /* check main status, clearing INTRQ */
4015 status
= ata_chk_status(ap
);
4016 if (unlikely(status
& ATA_BUSY
))
4018 DPRINTK("ata%u: protocol %d (dev_stat 0x%X)\n",
4019 ap
->id
, qc
->tf
.protocol
, status
);
4021 /* ack bmdma irq events */
4022 ap
->ops
->irq_clear(ap
);
4024 /* complete taskfile transaction */
4025 qc
->err_mask
|= ac_err_mask(status
);
4026 ata_qc_complete(qc
);
4033 return 1; /* irq handled */
4036 ap
->stats
.idle_irq
++;
4039 if ((ap
->stats
.idle_irq
% 1000) == 0) {
4041 ata_irq_ack(ap
, 0); /* debug trap */
4042 printk(KERN_WARNING
"ata%d: irq trap\n", ap
->id
);
4045 return 0; /* irq not handled */
4049 * ata_interrupt - Default ATA host interrupt handler
4050 * @irq: irq line (unused)
4051 * @dev_instance: pointer to our ata_host_set information structure
4054 * Default interrupt handler for PCI IDE devices. Calls
4055 * ata_host_intr() for each port that is not disabled.
4058 * Obtains host_set lock during operation.
4061 * IRQ_NONE or IRQ_HANDLED.
4064 irqreturn_t
ata_interrupt (int irq
, void *dev_instance
, struct pt_regs
*regs
)
4066 struct ata_host_set
*host_set
= dev_instance
;
4068 unsigned int handled
= 0;
4069 unsigned long flags
;
4071 /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */
4072 spin_lock_irqsave(&host_set
->lock
, flags
);
4074 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4075 struct ata_port
*ap
;
4077 ap
= host_set
->ports
[i
];
4079 !(ap
->flags
& (ATA_FLAG_PORT_DISABLED
| ATA_FLAG_NOINTR
))) {
4080 struct ata_queued_cmd
*qc
;
4082 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4083 if (qc
&& (!(qc
->tf
.ctl
& ATA_NIEN
)) &&
4084 (qc
->flags
& ATA_QCFLAG_ACTIVE
))
4085 handled
|= ata_host_intr(ap
, qc
);
4089 spin_unlock_irqrestore(&host_set
->lock
, flags
);
4091 return IRQ_RETVAL(handled
);
4095 * atapi_packet_task - Write CDB bytes to hardware
4096 * @_data: Port to which ATAPI device is attached.
4098 * When device has indicated its readiness to accept
4099 * a CDB, this function is called. Send the CDB.
4100 * If DMA is to be performed, exit immediately.
4101 * Otherwise, we are in polling mode, so poll
4102 * status under operation succeeds or fails.
4105 * Kernel thread context (may sleep)
4108 static void atapi_packet_task(void *_data
)
4110 struct ata_port
*ap
= _data
;
4111 struct ata_queued_cmd
*qc
;
4114 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
4116 assert(qc
->flags
& ATA_QCFLAG_ACTIVE
);
4118 /* sleep-wait for BSY to clear */
4119 DPRINTK("busy wait\n");
4120 if (ata_busy_sleep(ap
, ATA_TMOUT_CDB_QUICK
, ATA_TMOUT_CDB
)) {
4121 qc
->err_mask
|= AC_ERR_ATA_BUS
;
4125 /* make sure DRQ is set */
4126 status
= ata_chk_status(ap
);
4127 if ((status
& (ATA_BUSY
| ATA_DRQ
)) != ATA_DRQ
) {
4128 qc
->err_mask
|= AC_ERR_ATA_BUS
;
4133 DPRINTK("send cdb\n");
4134 assert(ap
->cdb_len
>= 12);
4136 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
||
4137 qc
->tf
.protocol
== ATA_PROT_ATAPI_NODATA
) {
4138 unsigned long flags
;
4140 /* Once we're done issuing command and kicking bmdma,
4141 * irq handler takes over. To not lose irq, we need
4142 * to clear NOINTR flag before sending cdb, but
4143 * interrupt handler shouldn't be invoked before we're
4144 * finished. Hence, the following locking.
4146 spin_lock_irqsave(&ap
->host_set
->lock
, flags
);
4147 ap
->flags
&= ~ATA_FLAG_NOINTR
;
4148 ata_data_xfer(ap
, qc
->cdb
, ap
->cdb_len
, 1);
4149 if (qc
->tf
.protocol
== ATA_PROT_ATAPI_DMA
)
4150 ap
->ops
->bmdma_start(qc
); /* initiate bmdma */
4151 spin_unlock_irqrestore(&ap
->host_set
->lock
, flags
);
4153 ata_data_xfer(ap
, qc
->cdb
, ap
->cdb_len
, 1);
4155 /* PIO commands are handled by polling */
4156 ap
->hsm_task_state
= HSM_ST
;
4157 queue_work(ata_wq
, &ap
->pio_task
);
4163 ata_poll_qc_complete(qc
);
4168 * ata_port_start - Set port up for dma.
4169 * @ap: Port to initialize
4171 * Called just after data structures for each port are
4172 * initialized. Allocates space for PRD table.
4174 * May be used as the port_start() entry in ata_port_operations.
4177 * Inherited from caller.
4181 * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
4182 * without filling any other registers
4184 static int ata_do_simple_cmd(struct ata_port
*ap
, struct ata_device
*dev
,
4187 struct ata_taskfile tf
;
4190 ata_tf_init(ap
, &tf
, dev
->devno
);
4193 tf
.flags
|= ATA_TFLAG_DEVICE
;
4194 tf
.protocol
= ATA_PROT_NODATA
;
4196 err
= ata_exec_internal(ap
, dev
, &tf
, DMA_NONE
, NULL
, 0);
4198 printk(KERN_ERR
"%s: ata command failed: %d\n",
4204 static int ata_flush_cache(struct ata_port
*ap
, struct ata_device
*dev
)
4208 if (!ata_try_flush_cache(dev
))
4211 if (ata_id_has_flush_ext(dev
->id
))
4212 cmd
= ATA_CMD_FLUSH_EXT
;
4214 cmd
= ATA_CMD_FLUSH
;
4216 return ata_do_simple_cmd(ap
, dev
, cmd
);
4219 static int ata_standby_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4221 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_STANDBYNOW1
);
4224 static int ata_start_drive(struct ata_port
*ap
, struct ata_device
*dev
)
4226 return ata_do_simple_cmd(ap
, dev
, ATA_CMD_IDLEIMMEDIATE
);
4230 * ata_device_resume - wakeup a previously suspended devices
4232 * Kick the drive back into action, by sending it an idle immediate
4233 * command and making sure its transfer mode matches between drive
4237 int ata_device_resume(struct ata_port
*ap
, struct ata_device
*dev
)
4239 if (ap
->flags
& ATA_FLAG_SUSPENDED
) {
4240 ap
->flags
&= ~ATA_FLAG_SUSPENDED
;
4243 if (!ata_dev_present(dev
))
4245 if (dev
->class == ATA_DEV_ATA
)
4246 ata_start_drive(ap
, dev
);
4252 * ata_device_suspend - prepare a device for suspend
4254 * Flush the cache on the drive, if appropriate, then issue a
4255 * standbynow command.
4258 int ata_device_suspend(struct ata_port
*ap
, struct ata_device
*dev
)
4260 if (!ata_dev_present(dev
))
4262 if (dev
->class == ATA_DEV_ATA
)
4263 ata_flush_cache(ap
, dev
);
4265 ata_standby_drive(ap
, dev
);
4266 ap
->flags
|= ATA_FLAG_SUSPENDED
;
4270 int ata_port_start (struct ata_port
*ap
)
4272 struct device
*dev
= ap
->host_set
->dev
;
4275 ap
->prd
= dma_alloc_coherent(dev
, ATA_PRD_TBL_SZ
, &ap
->prd_dma
, GFP_KERNEL
);
4279 rc
= ata_pad_alloc(ap
, dev
);
4281 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4285 DPRINTK("prd alloc, virt %p, dma %llx\n", ap
->prd
, (unsigned long long) ap
->prd_dma
);
4292 * ata_port_stop - Undo ata_port_start()
4293 * @ap: Port to shut down
4295 * Frees the PRD table.
4297 * May be used as the port_stop() entry in ata_port_operations.
4300 * Inherited from caller.
4303 void ata_port_stop (struct ata_port
*ap
)
4305 struct device
*dev
= ap
->host_set
->dev
;
4307 dma_free_coherent(dev
, ATA_PRD_TBL_SZ
, ap
->prd
, ap
->prd_dma
);
4308 ata_pad_free(ap
, dev
);
4311 void ata_host_stop (struct ata_host_set
*host_set
)
4313 if (host_set
->mmio_base
)
4314 iounmap(host_set
->mmio_base
);
4319 * ata_host_remove - Unregister SCSI host structure with upper layers
4320 * @ap: Port to unregister
4321 * @do_unregister: 1 if we fully unregister, 0 to just stop the port
4324 * Inherited from caller.
4327 static void ata_host_remove(struct ata_port
*ap
, unsigned int do_unregister
)
4329 struct Scsi_Host
*sh
= ap
->host
;
4334 scsi_remove_host(sh
);
4336 ap
->ops
->port_stop(ap
);
4340 * ata_host_init - Initialize an ata_port structure
4341 * @ap: Structure to initialize
4342 * @host: associated SCSI mid-layer structure
4343 * @host_set: Collection of hosts to which @ap belongs
4344 * @ent: Probe information provided by low-level driver
4345 * @port_no: Port number associated with this ata_port
4347 * Initialize a new ata_port structure, and its associated
4351 * Inherited from caller.
4354 static void ata_host_init(struct ata_port
*ap
, struct Scsi_Host
*host
,
4355 struct ata_host_set
*host_set
,
4356 const struct ata_probe_ent
*ent
, unsigned int port_no
)
4362 host
->max_channel
= 1;
4363 host
->unique_id
= ata_unique_id
++;
4364 host
->max_cmd_len
= 12;
4366 ap
->flags
= ATA_FLAG_PORT_DISABLED
;
4367 ap
->id
= host
->unique_id
;
4369 ap
->ctl
= ATA_DEVCTL_OBS
;
4370 ap
->host_set
= host_set
;
4371 ap
->port_no
= port_no
;
4373 ent
->legacy_mode
? ent
->hard_port_no
: port_no
;
4374 ap
->pio_mask
= ent
->pio_mask
;
4375 ap
->mwdma_mask
= ent
->mwdma_mask
;
4376 ap
->udma_mask
= ent
->udma_mask
;
4377 ap
->flags
|= ent
->host_flags
;
4378 ap
->ops
= ent
->port_ops
;
4379 ap
->cbl
= ATA_CBL_NONE
;
4380 ap
->active_tag
= ATA_TAG_POISON
;
4381 ap
->last_ctl
= 0xFF;
4383 INIT_WORK(&ap
->packet_task
, atapi_packet_task
, ap
);
4384 INIT_WORK(&ap
->pio_task
, ata_pio_task
, ap
);
4386 for (i
= 0; i
< ATA_MAX_DEVICES
; i
++)
4387 ap
->device
[i
].devno
= i
;
4390 ap
->stats
.unhandled_irq
= 1;
4391 ap
->stats
.idle_irq
= 1;
4394 memcpy(&ap
->ioaddr
, &ent
->port
[port_no
], sizeof(struct ata_ioports
));
4398 * ata_host_add - Attach low-level ATA driver to system
4399 * @ent: Information provided by low-level driver
4400 * @host_set: Collections of ports to which we add
4401 * @port_no: Port number associated with this host
4403 * Attach low-level ATA driver to system.
4406 * PCI/etc. bus probe sem.
4409 * New ata_port on success, for NULL on error.
4412 static struct ata_port
* ata_host_add(const struct ata_probe_ent
*ent
,
4413 struct ata_host_set
*host_set
,
4414 unsigned int port_no
)
4416 struct Scsi_Host
*host
;
4417 struct ata_port
*ap
;
4421 host
= scsi_host_alloc(ent
->sht
, sizeof(struct ata_port
));
4425 ap
= (struct ata_port
*) &host
->hostdata
[0];
4427 ata_host_init(ap
, host
, host_set
, ent
, port_no
);
4429 rc
= ap
->ops
->port_start(ap
);
4436 scsi_host_put(host
);
4441 * ata_device_add - Register hardware device with ATA and SCSI layers
4442 * @ent: Probe information describing hardware device to be registered
4444 * This function processes the information provided in the probe
4445 * information struct @ent, allocates the necessary ATA and SCSI
4446 * host information structures, initializes them, and registers
4447 * everything with requisite kernel subsystems.
4449 * This function requests irqs, probes the ATA bus, and probes
4453 * PCI/etc. bus probe sem.
4456 * Number of ports registered. Zero on error (no ports registered).
4459 int ata_device_add(const struct ata_probe_ent
*ent
)
4461 unsigned int count
= 0, i
;
4462 struct device
*dev
= ent
->dev
;
4463 struct ata_host_set
*host_set
;
4466 /* alloc a container for our list of ATA ports (buses) */
4467 host_set
= kzalloc(sizeof(struct ata_host_set
) +
4468 (ent
->n_ports
* sizeof(void *)), GFP_KERNEL
);
4471 spin_lock_init(&host_set
->lock
);
4473 host_set
->dev
= dev
;
4474 host_set
->n_ports
= ent
->n_ports
;
4475 host_set
->irq
= ent
->irq
;
4476 host_set
->mmio_base
= ent
->mmio_base
;
4477 host_set
->private_data
= ent
->private_data
;
4478 host_set
->ops
= ent
->port_ops
;
4480 /* register each port bound to this device */
4481 for (i
= 0; i
< ent
->n_ports
; i
++) {
4482 struct ata_port
*ap
;
4483 unsigned long xfer_mode_mask
;
4485 ap
= ata_host_add(ent
, host_set
, i
);
4489 host_set
->ports
[i
] = ap
;
4490 xfer_mode_mask
=(ap
->udma_mask
<< ATA_SHIFT_UDMA
) |
4491 (ap
->mwdma_mask
<< ATA_SHIFT_MWDMA
) |
4492 (ap
->pio_mask
<< ATA_SHIFT_PIO
);
4494 /* print per-port info to dmesg */
4495 printk(KERN_INFO
"ata%u: %cATA max %s cmd 0x%lX ctl 0x%lX "
4496 "bmdma 0x%lX irq %lu\n",
4498 ap
->flags
& ATA_FLAG_SATA
? 'S' : 'P',
4499 ata_mode_string(xfer_mode_mask
),
4500 ap
->ioaddr
.cmd_addr
,
4501 ap
->ioaddr
.ctl_addr
,
4502 ap
->ioaddr
.bmdma_addr
,
4506 host_set
->ops
->irq_clear(ap
);
4513 /* obtain irq, that is shared between channels */
4514 if (request_irq(ent
->irq
, ent
->port_ops
->irq_handler
, ent
->irq_flags
,
4515 DRV_NAME
, host_set
))
4518 /* perform each probe synchronously */
4519 DPRINTK("probe begin\n");
4520 for (i
= 0; i
< count
; i
++) {
4521 struct ata_port
*ap
;
4524 ap
= host_set
->ports
[i
];
4526 DPRINTK("ata%u: probe begin\n", ap
->id
);
4527 rc
= ata_bus_probe(ap
);
4528 DPRINTK("ata%u: probe end\n", ap
->id
);
4531 /* FIXME: do something useful here?
4532 * Current libata behavior will
4533 * tear down everything when
4534 * the module is removed
4535 * or the h/w is unplugged.
4539 rc
= scsi_add_host(ap
->host
, dev
);
4541 printk(KERN_ERR
"ata%u: scsi_add_host failed\n",
4543 /* FIXME: do something useful here */
4544 /* FIXME: handle unconditional calls to
4545 * scsi_scan_host and ata_host_remove, below,
4551 /* probes are done, now scan each port's disk(s) */
4552 DPRINTK("probe begin\n");
4553 for (i
= 0; i
< count
; i
++) {
4554 struct ata_port
*ap
= host_set
->ports
[i
];
4556 ata_scsi_scan_host(ap
);
4559 dev_set_drvdata(dev
, host_set
);
4561 VPRINTK("EXIT, returning %u\n", ent
->n_ports
);
4562 return ent
->n_ports
; /* success */
4565 for (i
= 0; i
< count
; i
++) {
4566 ata_host_remove(host_set
->ports
[i
], 1);
4567 scsi_host_put(host_set
->ports
[i
]->host
);
4571 VPRINTK("EXIT, returning 0\n");
4576 * ata_host_set_remove - PCI layer callback for device removal
4577 * @host_set: ATA host set that was removed
4579 * Unregister all objects associated with this host set. Free those
4583 * Inherited from calling layer (may sleep).
4586 void ata_host_set_remove(struct ata_host_set
*host_set
)
4588 struct ata_port
*ap
;
4591 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4592 ap
= host_set
->ports
[i
];
4593 scsi_remove_host(ap
->host
);
4596 free_irq(host_set
->irq
, host_set
);
4598 for (i
= 0; i
< host_set
->n_ports
; i
++) {
4599 ap
= host_set
->ports
[i
];
4601 ata_scsi_release(ap
->host
);
4603 if ((ap
->flags
& ATA_FLAG_NO_LEGACY
) == 0) {
4604 struct ata_ioports
*ioaddr
= &ap
->ioaddr
;
4606 if (ioaddr
->cmd_addr
== 0x1f0)
4607 release_region(0x1f0, 8);
4608 else if (ioaddr
->cmd_addr
== 0x170)
4609 release_region(0x170, 8);
4612 scsi_host_put(ap
->host
);
4615 if (host_set
->ops
->host_stop
)
4616 host_set
->ops
->host_stop(host_set
);
4622 * ata_scsi_release - SCSI layer callback hook for host unload
4623 * @host: libata host to be unloaded
4625 * Performs all duties necessary to shut down a libata port...
4626 * Kill port kthread, disable port, and release resources.
4629 * Inherited from SCSI layer.
4635 int ata_scsi_release(struct Scsi_Host
*host
)
4637 struct ata_port
*ap
= (struct ata_port
*) &host
->hostdata
[0];
4641 ap
->ops
->port_disable(ap
);
4642 ata_host_remove(ap
, 0);
4649 * ata_std_ports - initialize ioaddr with standard port offsets.
4650 * @ioaddr: IO address structure to be initialized
4652 * Utility function which initializes data_addr, error_addr,
4653 * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
4654 * device_addr, status_addr, and command_addr to standard offsets
4655 * relative to cmd_addr.
4657 * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
4660 void ata_std_ports(struct ata_ioports
*ioaddr
)
4662 ioaddr
->data_addr
= ioaddr
->cmd_addr
+ ATA_REG_DATA
;
4663 ioaddr
->error_addr
= ioaddr
->cmd_addr
+ ATA_REG_ERR
;
4664 ioaddr
->feature_addr
= ioaddr
->cmd_addr
+ ATA_REG_FEATURE
;
4665 ioaddr
->nsect_addr
= ioaddr
->cmd_addr
+ ATA_REG_NSECT
;
4666 ioaddr
->lbal_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAL
;
4667 ioaddr
->lbam_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAM
;
4668 ioaddr
->lbah_addr
= ioaddr
->cmd_addr
+ ATA_REG_LBAH
;
4669 ioaddr
->device_addr
= ioaddr
->cmd_addr
+ ATA_REG_DEVICE
;
4670 ioaddr
->status_addr
= ioaddr
->cmd_addr
+ ATA_REG_STATUS
;
4671 ioaddr
->command_addr
= ioaddr
->cmd_addr
+ ATA_REG_CMD
;
4674 static struct ata_probe_ent
*
4675 ata_probe_ent_alloc(struct device
*dev
, const struct ata_port_info
*port
)
4677 struct ata_probe_ent
*probe_ent
;
4679 probe_ent
= kzalloc(sizeof(*probe_ent
), GFP_KERNEL
);
4681 printk(KERN_ERR DRV_NAME
"(%s): out of memory\n",
4682 kobject_name(&(dev
->kobj
)));
4686 INIT_LIST_HEAD(&probe_ent
->node
);
4687 probe_ent
->dev
= dev
;
4689 probe_ent
->sht
= port
->sht
;
4690 probe_ent
->host_flags
= port
->host_flags
;
4691 probe_ent
->pio_mask
= port
->pio_mask
;
4692 probe_ent
->mwdma_mask
= port
->mwdma_mask
;
4693 probe_ent
->udma_mask
= port
->udma_mask
;
4694 probe_ent
->port_ops
= port
->port_ops
;
4703 void ata_pci_host_stop (struct ata_host_set
*host_set
)
4705 struct pci_dev
*pdev
= to_pci_dev(host_set
->dev
);
4707 pci_iounmap(pdev
, host_set
->mmio_base
);
4711 * ata_pci_init_native_mode - Initialize native-mode driver
4712 * @pdev: pci device to be initialized
4713 * @port: array[2] of pointers to port info structures.
4714 * @ports: bitmap of ports present
4716 * Utility function which allocates and initializes an
4717 * ata_probe_ent structure for a standard dual-port
4718 * PIO-based IDE controller. The returned ata_probe_ent
4719 * structure can be passed to ata_device_add(). The returned
4720 * ata_probe_ent structure should then be freed with kfree().
4722 * The caller need only pass the address of the primary port, the
4723 * secondary will be deduced automatically. If the device has non
4724 * standard secondary port mappings this function can be called twice,
4725 * once for each interface.
4728 struct ata_probe_ent
*
4729 ata_pci_init_native_mode(struct pci_dev
*pdev
, struct ata_port_info
**port
, int ports
)
4731 struct ata_probe_ent
*probe_ent
=
4732 ata_probe_ent_alloc(pci_dev_to_dev(pdev
), port
[0]);
4738 probe_ent
->irq
= pdev
->irq
;
4739 probe_ent
->irq_flags
= SA_SHIRQ
;
4740 probe_ent
->private_data
= port
[0]->private_data
;
4742 if (ports
& ATA_PORT_PRIMARY
) {
4743 probe_ent
->port
[p
].cmd_addr
= pci_resource_start(pdev
, 0);
4744 probe_ent
->port
[p
].altstatus_addr
=
4745 probe_ent
->port
[p
].ctl_addr
=
4746 pci_resource_start(pdev
, 1) | ATA_PCI_CTL_OFS
;
4747 probe_ent
->port
[p
].bmdma_addr
= pci_resource_start(pdev
, 4);
4748 ata_std_ports(&probe_ent
->port
[p
]);
4752 if (ports
& ATA_PORT_SECONDARY
) {
4753 probe_ent
->port
[p
].cmd_addr
= pci_resource_start(pdev
, 2);
4754 probe_ent
->port
[p
].altstatus_addr
=
4755 probe_ent
->port
[p
].ctl_addr
=
4756 pci_resource_start(pdev
, 3) | ATA_PCI_CTL_OFS
;
4757 probe_ent
->port
[p
].bmdma_addr
= pci_resource_start(pdev
, 4) + 8;
4758 ata_std_ports(&probe_ent
->port
[p
]);
4762 probe_ent
->n_ports
= p
;
4766 static struct ata_probe_ent
*ata_pci_init_legacy_port(struct pci_dev
*pdev
, struct ata_port_info
*port
, int port_num
)
4768 struct ata_probe_ent
*probe_ent
;
4770 probe_ent
= ata_probe_ent_alloc(pci_dev_to_dev(pdev
), port
);
4774 probe_ent
->legacy_mode
= 1;
4775 probe_ent
->n_ports
= 1;
4776 probe_ent
->hard_port_no
= port_num
;
4777 probe_ent
->private_data
= port
->private_data
;
4782 probe_ent
->irq
= 14;
4783 probe_ent
->port
[0].cmd_addr
= 0x1f0;
4784 probe_ent
->port
[0].altstatus_addr
=
4785 probe_ent
->port
[0].ctl_addr
= 0x3f6;
4788 probe_ent
->irq
= 15;
4789 probe_ent
->port
[0].cmd_addr
= 0x170;
4790 probe_ent
->port
[0].altstatus_addr
=
4791 probe_ent
->port
[0].ctl_addr
= 0x376;
4794 probe_ent
->port
[0].bmdma_addr
= pci_resource_start(pdev
, 4) + 8 * port_num
;
4795 ata_std_ports(&probe_ent
->port
[0]);
4800 * ata_pci_init_one - Initialize/register PCI IDE host controller
4801 * @pdev: Controller to be initialized
4802 * @port_info: Information from low-level host driver
4803 * @n_ports: Number of ports attached to host controller
4805 * This is a helper function which can be called from a driver's
4806 * xxx_init_one() probe function if the hardware uses traditional
4807 * IDE taskfile registers.
4809 * This function calls pci_enable_device(), reserves its register
4810 * regions, sets the dma mask, enables bus master mode, and calls
4814 * Inherited from PCI layer (may sleep).
4817 * Zero on success, negative on errno-based value on error.
4820 int ata_pci_init_one (struct pci_dev
*pdev
, struct ata_port_info
**port_info
,
4821 unsigned int n_ports
)
4823 struct ata_probe_ent
*probe_ent
= NULL
, *probe_ent2
= NULL
;
4824 struct ata_port_info
*port
[2];
4826 unsigned int legacy_mode
= 0;
4827 int disable_dev_on_err
= 1;
4832 port
[0] = port_info
[0];
4834 port
[1] = port_info
[1];
4838 if ((port
[0]->host_flags
& ATA_FLAG_NO_LEGACY
) == 0
4839 && (pdev
->class >> 8) == PCI_CLASS_STORAGE_IDE
) {
4840 /* TODO: What if one channel is in native mode ... */
4841 pci_read_config_byte(pdev
, PCI_CLASS_PROG
, &tmp8
);
4842 mask
= (1 << 2) | (1 << 0);
4843 if ((tmp8
& mask
) != mask
)
4844 legacy_mode
= (1 << 3);
4848 if ((!legacy_mode
) && (n_ports
> 2)) {
4849 printk(KERN_ERR
"ata: BUG: native mode, n_ports > 2\n");
4854 /* FIXME: Really for ATA it isn't safe because the device may be
4855 multi-purpose and we want to leave it alone if it was already
4856 enabled. Secondly for shared use as Arjan says we want refcounting
4858 Checking dev->is_enabled is insufficient as this is not set at
4859 boot for the primary video which is BIOS enabled
4862 rc
= pci_enable_device(pdev
);
4866 rc
= pci_request_regions(pdev
, DRV_NAME
);
4868 disable_dev_on_err
= 0;
4872 /* FIXME: Should use platform specific mappers for legacy port ranges */
4874 if (!request_region(0x1f0, 8, "libata")) {
4875 struct resource
*conflict
, res
;
4877 res
.end
= 0x1f0 + 8 - 1;
4878 conflict
= ____request_resource(&ioport_resource
, &res
);
4879 if (!strcmp(conflict
->name
, "libata"))
4880 legacy_mode
|= (1 << 0);
4882 disable_dev_on_err
= 0;
4883 printk(KERN_WARNING
"ata: 0x1f0 IDE port busy\n");
4886 legacy_mode
|= (1 << 0);
4888 if (!request_region(0x170, 8, "libata")) {
4889 struct resource
*conflict
, res
;
4891 res
.end
= 0x170 + 8 - 1;
4892 conflict
= ____request_resource(&ioport_resource
, &res
);
4893 if (!strcmp(conflict
->name
, "libata"))
4894 legacy_mode
|= (1 << 1);
4896 disable_dev_on_err
= 0;
4897 printk(KERN_WARNING
"ata: 0x170 IDE port busy\n");
4900 legacy_mode
|= (1 << 1);
4903 /* we have legacy mode, but all ports are unavailable */
4904 if (legacy_mode
== (1 << 3)) {
4906 goto err_out_regions
;
4909 rc
= pci_set_dma_mask(pdev
, ATA_DMA_MASK
);
4911 goto err_out_regions
;
4912 rc
= pci_set_consistent_dma_mask(pdev
, ATA_DMA_MASK
);
4914 goto err_out_regions
;
4917 if (legacy_mode
& (1 << 0))
4918 probe_ent
= ata_pci_init_legacy_port(pdev
, port
[0], 0);
4919 if (legacy_mode
& (1 << 1))
4920 probe_ent2
= ata_pci_init_legacy_port(pdev
, port
[1], 1);
4923 probe_ent
= ata_pci_init_native_mode(pdev
, port
, ATA_PORT_PRIMARY
| ATA_PORT_SECONDARY
);
4925 probe_ent
= ata_pci_init_native_mode(pdev
, port
, ATA_PORT_PRIMARY
);
4927 if (!probe_ent
&& !probe_ent2
) {
4929 goto err_out_regions
;
4932 pci_set_master(pdev
);
4934 /* FIXME: check ata_device_add return */
4936 if (legacy_mode
& (1 << 0))
4937 ata_device_add(probe_ent
);
4938 if (legacy_mode
& (1 << 1))
4939 ata_device_add(probe_ent2
);
4941 ata_device_add(probe_ent
);
4949 if (legacy_mode
& (1 << 0))
4950 release_region(0x1f0, 8);
4951 if (legacy_mode
& (1 << 1))
4952 release_region(0x170, 8);
4953 pci_release_regions(pdev
);
4955 if (disable_dev_on_err
)
4956 pci_disable_device(pdev
);
4961 * ata_pci_remove_one - PCI layer callback for device removal
4962 * @pdev: PCI device that was removed
4964 * PCI layer indicates to libata via this hook that
4965 * hot-unplug or module unload event has occurred.
4966 * Handle this by unregistering all objects associated
4967 * with this PCI device. Free those objects. Then finally
4968 * release PCI resources and disable device.
4971 * Inherited from PCI layer (may sleep).
4974 void ata_pci_remove_one (struct pci_dev
*pdev
)
4976 struct device
*dev
= pci_dev_to_dev(pdev
);
4977 struct ata_host_set
*host_set
= dev_get_drvdata(dev
);
4979 ata_host_set_remove(host_set
);
4980 pci_release_regions(pdev
);
4981 pci_disable_device(pdev
);
4982 dev_set_drvdata(dev
, NULL
);
4985 /* move to PCI subsystem */
4986 int pci_test_config_bits(struct pci_dev
*pdev
, const struct pci_bits
*bits
)
4988 unsigned long tmp
= 0;
4990 switch (bits
->width
) {
4993 pci_read_config_byte(pdev
, bits
->reg
, &tmp8
);
4999 pci_read_config_word(pdev
, bits
->reg
, &tmp16
);
5005 pci_read_config_dword(pdev
, bits
->reg
, &tmp32
);
5016 return (tmp
== bits
->val
) ? 1 : 0;
5019 int ata_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t state
)
5021 pci_save_state(pdev
);
5022 pci_disable_device(pdev
);
5023 pci_set_power_state(pdev
, PCI_D3hot
);
5027 int ata_pci_device_resume(struct pci_dev
*pdev
)
5029 pci_set_power_state(pdev
, PCI_D0
);
5030 pci_restore_state(pdev
);
5031 pci_enable_device(pdev
);
5032 pci_set_master(pdev
);
5035 #endif /* CONFIG_PCI */
5038 static int __init
ata_init(void)
5040 ata_wq
= create_workqueue("ata");
5044 printk(KERN_DEBUG
"libata version " DRV_VERSION
" loaded.\n");
5048 static void __exit
ata_exit(void)
5050 destroy_workqueue(ata_wq
);
5053 module_init(ata_init
);
5054 module_exit(ata_exit
);
5056 static unsigned long ratelimit_time
;
5057 static spinlock_t ata_ratelimit_lock
= SPIN_LOCK_UNLOCKED
;
5059 int ata_ratelimit(void)
5062 unsigned long flags
;
5064 spin_lock_irqsave(&ata_ratelimit_lock
, flags
);
5066 if (time_after(jiffies
, ratelimit_time
)) {
5068 ratelimit_time
= jiffies
+ (HZ
/5);
5072 spin_unlock_irqrestore(&ata_ratelimit_lock
, flags
);
5078 * libata is essentially a library of internal helper functions for
5079 * low-level ATA host controller drivers. As such, the API/ABI is
5080 * likely to change as new drivers are added and updated.
5081 * Do not depend on ABI/API stability.
5084 EXPORT_SYMBOL_GPL(ata_std_bios_param
);
5085 EXPORT_SYMBOL_GPL(ata_std_ports
);
5086 EXPORT_SYMBOL_GPL(ata_device_add
);
5087 EXPORT_SYMBOL_GPL(ata_host_set_remove
);
5088 EXPORT_SYMBOL_GPL(ata_sg_init
);
5089 EXPORT_SYMBOL_GPL(ata_sg_init_one
);
5090 EXPORT_SYMBOL_GPL(ata_qc_complete
);
5091 EXPORT_SYMBOL_GPL(ata_qc_issue_prot
);
5092 EXPORT_SYMBOL_GPL(ata_eng_timeout
);
5093 EXPORT_SYMBOL_GPL(ata_tf_load
);
5094 EXPORT_SYMBOL_GPL(ata_tf_read
);
5095 EXPORT_SYMBOL_GPL(ata_noop_dev_select
);
5096 EXPORT_SYMBOL_GPL(ata_std_dev_select
);
5097 EXPORT_SYMBOL_GPL(ata_tf_to_fis
);
5098 EXPORT_SYMBOL_GPL(ata_tf_from_fis
);
5099 EXPORT_SYMBOL_GPL(ata_check_status
);
5100 EXPORT_SYMBOL_GPL(ata_altstatus
);
5101 EXPORT_SYMBOL_GPL(ata_exec_command
);
5102 EXPORT_SYMBOL_GPL(ata_port_start
);
5103 EXPORT_SYMBOL_GPL(ata_port_stop
);
5104 EXPORT_SYMBOL_GPL(ata_host_stop
);
5105 EXPORT_SYMBOL_GPL(ata_interrupt
);
5106 EXPORT_SYMBOL_GPL(ata_qc_prep
);
5107 EXPORT_SYMBOL_GPL(ata_bmdma_setup
);
5108 EXPORT_SYMBOL_GPL(ata_bmdma_start
);
5109 EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear
);
5110 EXPORT_SYMBOL_GPL(ata_bmdma_status
);
5111 EXPORT_SYMBOL_GPL(ata_bmdma_stop
);
5112 EXPORT_SYMBOL_GPL(ata_port_probe
);
5113 EXPORT_SYMBOL_GPL(sata_phy_reset
);
5114 EXPORT_SYMBOL_GPL(__sata_phy_reset
);
5115 EXPORT_SYMBOL_GPL(ata_bus_reset
);
5116 EXPORT_SYMBOL_GPL(ata_port_disable
);
5117 EXPORT_SYMBOL_GPL(ata_ratelimit
);
5118 EXPORT_SYMBOL_GPL(ata_scsi_ioctl
);
5119 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd
);
5120 EXPORT_SYMBOL_GPL(ata_scsi_error
);
5121 EXPORT_SYMBOL_GPL(ata_scsi_slave_config
);
5122 EXPORT_SYMBOL_GPL(ata_scsi_release
);
5123 EXPORT_SYMBOL_GPL(ata_host_intr
);
5124 EXPORT_SYMBOL_GPL(ata_dev_classify
);
5125 EXPORT_SYMBOL_GPL(ata_dev_id_string
);
5126 EXPORT_SYMBOL_GPL(ata_dev_config
);
5127 EXPORT_SYMBOL_GPL(ata_scsi_simulate
);
5129 EXPORT_SYMBOL_GPL(ata_timing_compute
);
5130 EXPORT_SYMBOL_GPL(ata_timing_merge
);
5133 EXPORT_SYMBOL_GPL(pci_test_config_bits
);
5134 EXPORT_SYMBOL_GPL(ata_pci_host_stop
);
5135 EXPORT_SYMBOL_GPL(ata_pci_init_native_mode
);
5136 EXPORT_SYMBOL_GPL(ata_pci_init_one
);
5137 EXPORT_SYMBOL_GPL(ata_pci_remove_one
);
5138 EXPORT_SYMBOL_GPL(ata_pci_device_suspend
);
5139 EXPORT_SYMBOL_GPL(ata_pci_device_resume
);
5140 #endif /* CONFIG_PCI */
5142 EXPORT_SYMBOL_GPL(ata_device_suspend
);
5143 EXPORT_SYMBOL_GPL(ata_device_resume
);
5144 EXPORT_SYMBOL_GPL(ata_scsi_device_suspend
);
5145 EXPORT_SYMBOL_GPL(ata_scsi_device_resume
);