2005-04-16 16:20:36 -06:00
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/*
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2005-08-28 18:18:39 -06:00
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* Copyright 2003-2005 Red Hat, Inc. All rights reserved.
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* Copyright 2003-2005 Jeff Garzik
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* libata documentation is available via 'make {ps|pdf}docs',
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* as Documentation/DocBook/libata.*
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*
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2005-04-16 16:20:36 -06:00
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*/
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#ifndef __LINUX_LIBATA_H__
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#define __LINUX_LIBATA_H__
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#include <linux/delay.h>
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2008-05-19 11:17:51 -06:00
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#include <linux/jiffies.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/interrupt.h>
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2005-11-10 17:21:38 -07:00
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#include <linux/dma-mapping.h>
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2007-10-16 03:14:12 -06:00
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#include <linux/scatterlist.h>
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2007-01-20 00:00:28 -07:00
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#include <linux/io.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/ata.h>
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#include <linux/workqueue.h>
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2006-04-11 11:12:34 -06:00
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#include <scsi/scsi_host.h>
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2006-09-28 12:29:01 -06:00
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#include <linux/acpi.h>
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2007-12-05 00:43:06 -07:00
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#include <linux/cdrom.h>
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2005-04-16 16:20:36 -06:00
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2006-09-25 13:33:09 -06:00
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/*
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* Define if arch has non-standard setup. This is a _PCI_ standard
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* not a legacy or ISA standard.
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*/
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#ifdef CONFIG_ATA_NONSTANDARD
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2006-08-10 01:59:10 -06:00
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#include <asm/libata-portmap.h>
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2006-09-25 13:33:09 -06:00
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#else
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#include <asm-generic/libata-portmap.h>
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#endif
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2006-08-10 01:59:10 -06:00
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2005-04-16 16:20:36 -06:00
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/*
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2006-01-17 17:34:42 -07:00
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* compile-time options: to be removed as soon as all the drivers are
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* converted to the new debugging mechanism
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2005-04-16 16:20:36 -06:00
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*/
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#undef ATA_DEBUG /* debugging output */
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#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
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#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
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#undef ATA_NDEBUG /* define to disable quick runtime checks */
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/* note: prints function name for you */
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#ifdef ATA_DEBUG
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2008-07-20 14:06:19 -06:00
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#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
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2005-04-16 16:20:36 -06:00
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#ifdef ATA_VERBOSE_DEBUG
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2008-07-20 14:06:19 -06:00
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#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
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2005-04-16 16:20:36 -06:00
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#else
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#define VPRINTK(fmt, args...)
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#endif /* ATA_VERBOSE_DEBUG */
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#else
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#define DPRINTK(fmt, args...)
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#define VPRINTK(fmt, args...)
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#endif /* ATA_DEBUG */
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2008-07-20 14:06:19 -06:00
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#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
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2005-11-14 12:14:16 -07:00
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2006-01-17 17:34:42 -07:00
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/* NEW: debug levels */
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#define HAVE_LIBATA_MSG 1
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enum {
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ATA_MSG_DRV = 0x0001,
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ATA_MSG_INFO = 0x0002,
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ATA_MSG_PROBE = 0x0004,
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ATA_MSG_WARN = 0x0008,
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ATA_MSG_MALLOC = 0x0010,
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ATA_MSG_CTL = 0x0020,
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ATA_MSG_INTR = 0x0040,
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ATA_MSG_ERR = 0x0080,
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};
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#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
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#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
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#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
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#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
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#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
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#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
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#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
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#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
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static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
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{
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if (dval < 0 || dval >= (sizeof(u32) * 8))
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return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
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if (!dval)
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return 0;
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return (1 << dval) - 1;
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}
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2005-04-16 16:20:36 -06:00
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/* defines only for the constants which don't work well as enums */
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#define ATA_TAG_POISON 0xfafbfcfdU
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enum {
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/* various global constants */
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LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
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2007-07-06 17:13:52 -06:00
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LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
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2005-04-16 16:20:36 -06:00
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ATA_DEF_QUEUE = 1,
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2006-05-15 05:58:02 -06:00
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/* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
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2006-05-15 06:03:48 -06:00
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ATA_MAX_QUEUE = 32,
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2006-05-15 05:58:02 -06:00
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ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
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2008-05-19 11:17:51 -06:00
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ATA_SHORT_PAUSE = 16,
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2005-04-16 16:20:36 -06:00
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2007-12-11 20:21:52 -07:00
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ATAPI_MAX_DRAIN = 16 << 10,
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2008-01-23 08:05:14 -07:00
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ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
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2005-04-16 16:20:36 -06:00
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ATA_SHT_EMULATED = 1,
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ATA_SHT_CMD_PER_LUN = 1,
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ATA_SHT_THIS_ID = -1,
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2005-10-21 22:19:33 -06:00
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ATA_SHT_USE_CLUSTERING = 1,
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2005-04-16 16:20:36 -06:00
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/* struct ata_device stuff */
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2006-04-02 03:51:52 -06:00
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ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
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ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
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2006-04-02 08:30:40 -06:00
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ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
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2006-05-15 06:03:38 -06:00
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ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
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2006-11-11 04:10:45 -07:00
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ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
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libata: reimplement ACPI invocation
This patch reimplements ACPI invocation such that, instead of
exporting ACPI details to the rest of libata, ACPI event handlers -
ata_acpi_on_resume() and ata_acpi_on_devcfg() - are used. These two
functions are responsible for determining whether specific ACPI method
is used and when.
On resume, _GTF is scheduled by setting ATA_DFLAG_ACPI_PENDING device
flag. This is done this way to avoid performing the action on wrong
device device (device swapping while suspended).
On every ata_dev_configure(), ata_acpi_on_devcfg() is called, which
performs _SDD and _GTF. _GTF is performed only after resuming and, if
SATA, hardreset as the ACPI spec specifies. As _GTF may contain
arbitrary commands, IDENTIFY page is re-read after _GTF taskfiles are
executed.
If one of ACPI methods fails, ata_acpi_on_devcfg() retries on the
first failure. If it fails again on the second try, ACPI is disabled
on the device. Note that successful configuration clears ACPI failed
status.
With all feature checks moved to the above two functions,
do_drive_set_taskfiles() is trivial and thus collapsed into
ata_acpi_exec_tfs(), which is now static and converted to return the
number of executed taskfiles to be used by ata_acpi_on_resume(). As
failures are handled properly, ata_acpi_push_id() now returns -errno
on errors instead of unconditional zero.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-05-14 12:28:16 -06:00
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ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
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ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
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2007-09-22 22:14:13 -06:00
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ATA_DFLAG_AN = (1 << 7), /* AN configured */
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2007-10-24 22:58:59 -06:00
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ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
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ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
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2008-02-20 21:25:50 -07:00
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ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
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2007-09-11 12:41:59 -06:00
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ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
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2006-04-02 03:51:52 -06:00
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2007-09-11 12:41:59 -06:00
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ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
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ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
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ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
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2007-10-25 03:30:36 -06:00
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ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
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2007-11-27 03:28:58 -07:00
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ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
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2008-09-21 03:54:08 -06:00
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ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
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2007-11-27 03:28:52 -07:00
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ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
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2005-04-16 16:20:36 -06:00
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2007-11-27 03:28:52 -07:00
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ATA_DFLAG_DETACH = (1 << 24),
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ATA_DFLAG_DETACHED = (1 << 25),
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2006-05-31 03:27:29 -06:00
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2005-04-16 16:20:36 -06:00
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ATA_DEV_UNKNOWN = 0, /* unknown device */
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ATA_DEV_ATA = 1, /* ATA device */
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ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
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ATA_DEV_ATAPI = 3, /* ATAPI device */
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ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
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2007-09-22 22:14:12 -06:00
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ATA_DEV_PMP = 5, /* SATA port multiplier */
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ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
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ATA_DEV_SEMB = 7, /* SEMB */
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ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
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ATA_DEV_NONE = 9, /* no device */
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2005-04-16 16:20:36 -06:00
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2007-08-06 03:36:23 -06:00
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/* struct ata_link flags */
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2008-08-13 05:19:09 -06:00
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ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
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2007-09-22 22:14:12 -06:00
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ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
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ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
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ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
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ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
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2007-09-22 22:14:12 -06:00
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ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
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2007-09-22 22:14:13 -06:00
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ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
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2008-06-03 11:33:55 -06:00
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ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
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2007-08-06 03:36:23 -06:00
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2005-04-16 16:20:36 -06:00
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/* struct ata_port flags */
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2006-04-02 03:51:52 -06:00
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ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
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2005-04-16 16:20:36 -06:00
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/* (doesn't imply presence) */
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2006-04-02 03:51:52 -06:00
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ATA_FLAG_SATA = (1 << 1),
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ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
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ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
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ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
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ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
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ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
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ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
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ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
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2006-05-31 03:27:25 -06:00
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ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
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* doesn't handle PIO interrupts */
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ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
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ATA_FLAG_DEBUGMSG = (1 << 13),
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2007-01-25 03:40:05 -07:00
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ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
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2007-02-07 14:46:00 -07:00
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ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
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2007-05-14 12:28:15 -06:00
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ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
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2007-08-15 01:57:11 -06:00
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ATA_FLAG_AN = (1 << 18), /* controller supports AN */
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2007-09-22 22:14:12 -06:00
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ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
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2007-10-24 22:58:59 -06:00
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ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
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2008-06-03 11:33:55 -06:00
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ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
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* management */
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ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
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* led */
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2006-04-02 03:51:52 -06:00
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2006-06-28 10:29:30 -06:00
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/* The following flag belongs to ap->pflags but is kept in
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* ap->flags because it's referenced in many LLDs and will be
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* removed in not-too-distant future.
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*/
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ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
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/* bits 24:31 of ap->flags are reserved for LLD specific flags */
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2006-05-15 05:57:58 -06:00
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2006-06-28 10:29:30 -06:00
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/* struct ata_port pflags */
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ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
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ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
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ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
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ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
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ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
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ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
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ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
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2007-05-01 03:50:15 -06:00
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ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
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2007-10-09 00:06:10 -06:00
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ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
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2006-04-02 03:51:52 -06:00
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2006-06-28 10:29:30 -06:00
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ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
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2006-07-03 01:07:27 -06:00
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ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
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2007-12-14 23:05:02 -07:00
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ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
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2006-04-02 03:51:52 -06:00
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/* struct ata_queued_cmd flags */
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ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
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2007-12-05 00:43:09 -07:00
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ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
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2006-04-02 03:51:53 -06:00
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ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
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2006-05-15 05:57:40 -06:00
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ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
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2007-09-22 22:14:12 -06:00
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ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
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2007-10-26 01:19:26 -06:00
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ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
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2008-03-27 04:14:24 -06:00
|
|
|
ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
|
2006-05-15 05:57:40 -06:00
|
|
|
|
2006-05-15 05:57:58 -06:00
|
|
|
ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
|
|
|
|
ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
|
|
|
|
ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-03-27 10:42:40 -07:00
|
|
|
/* host set flags */
|
2006-08-24 01:19:22 -06:00
|
|
|
ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
|
2007-04-17 08:44:06 -06:00
|
|
|
ATA_HOST_STARTED = (1 << 1), /* Host started */
|
2006-08-30 22:02:15 -06:00
|
|
|
|
2007-07-10 00:55:43 -06:00
|
|
|
/* bits 24:31 of host->flags are reserved for LLD specific flags */
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* various lengths of time */
|
2008-05-19 11:17:51 -06:00
|
|
|
ATA_TMOUT_BOOT = 30000, /* heuristic */
|
|
|
|
ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
|
|
|
|
ATA_TMOUT_INTERNAL_QUICK = 5000,
|
2008-09-21 03:54:08 -06:00
|
|
|
ATA_TMOUT_MAX_PARK = 30000,
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-10-16 15:21:24 -06:00
|
|
|
/* FIXME: GoVault needs 2s but we can't afford that without
|
|
|
|
* parallel probing. 800ms is enough for iVDR disk
|
|
|
|
* HHD424020F7SV00. Increase to 2secs when parallel probing
|
|
|
|
* is in place.
|
|
|
|
*/
|
2008-05-19 11:17:51 -06:00
|
|
|
ATA_TMOUT_FF_WAIT = 800,
|
2007-10-16 15:21:24 -06:00
|
|
|
|
2008-04-07 07:47:19 -06:00
|
|
|
/* Spec mandates to wait for ">= 2ms" before checking status
|
|
|
|
* after reset. We wait 150ms, because that was the magic
|
|
|
|
* delay used for ATAPI devices in Hale Landis's ATADRVR, for
|
|
|
|
* the period of time between when the ATA command register is
|
|
|
|
* written, and then status is checked. Because waiting for
|
|
|
|
* "a while" before checking status is fine, post SRST, we
|
|
|
|
* perform this magic delay here as well.
|
|
|
|
*
|
|
|
|
* Old drivers/ide uses the 2mS rule and then waits for ready.
|
|
|
|
*/
|
2008-05-19 11:17:51 -06:00
|
|
|
ATA_WAIT_AFTER_RESET = 150,
|
2008-04-07 07:47:19 -06:00
|
|
|
|
2008-04-07 07:47:19 -06:00
|
|
|
/* If PMP is supported, we have to do follow-up SRST. As some
|
|
|
|
* PMPs don't send D2H Reg FIS after hardreset, LLDs are
|
|
|
|
* advised to wait only for the following duration before
|
|
|
|
* doing SRST.
|
|
|
|
*/
|
2008-05-19 11:17:51 -06:00
|
|
|
ATA_TMOUT_PMP_SRST_WAIT = 1000,
|
2008-04-07 07:47:19 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* ATA bus states */
|
|
|
|
BUS_UNKNOWN = 0,
|
|
|
|
BUS_DMA = 1,
|
|
|
|
BUS_IDLE = 2,
|
|
|
|
BUS_NOINTR = 3,
|
|
|
|
BUS_NODATA = 4,
|
|
|
|
BUS_TIMER = 5,
|
|
|
|
BUS_PIO = 6,
|
|
|
|
BUS_EDD = 7,
|
|
|
|
BUS_IDENTIFY = 8,
|
|
|
|
BUS_PACKET = 9,
|
|
|
|
|
|
|
|
/* SATA port states */
|
|
|
|
PORT_UNKNOWN = 0,
|
|
|
|
PORT_ENABLED = 1,
|
|
|
|
PORT_DISABLED = 2,
|
|
|
|
|
|
|
|
/* encoding various smaller bitmaps into a single
|
2007-11-27 03:43:42 -07:00
|
|
|
* unsigned long bitmap
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
2007-11-27 03:43:40 -07:00
|
|
|
ATA_NR_PIO_MODES = 7,
|
|
|
|
ATA_NR_MWDMA_MODES = 5,
|
|
|
|
ATA_NR_UDMA_MODES = 8,
|
2006-03-05 12:31:56 -07:00
|
|
|
|
|
|
|
ATA_SHIFT_PIO = 0,
|
2007-11-27 03:43:40 -07:00
|
|
|
ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
|
|
|
|
ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
|
|
|
|
|
2005-10-05 05:13:30 -06:00
|
|
|
/* size of buffer to pad xfers ending on unaligned boundaries */
|
|
|
|
ATA_DMA_PAD_SZ = 4,
|
2006-04-02 03:51:52 -06:00
|
|
|
|
2006-05-15 05:58:19 -06:00
|
|
|
/* ering size */
|
|
|
|
ATA_ERING_SIZE = 32,
|
|
|
|
|
2007-09-22 22:14:12 -06:00
|
|
|
/* return values for ->qc_defer */
|
|
|
|
ATA_DEFER_LINK = 1,
|
|
|
|
ATA_DEFER_PORT = 2,
|
|
|
|
|
2006-05-15 05:58:21 -06:00
|
|
|
/* desc_len for ata_eh_info and context */
|
|
|
|
ATA_EH_DESC_LEN = 80,
|
|
|
|
|
2006-05-15 05:58:17 -06:00
|
|
|
/* reset / recovery action types */
|
|
|
|
ATA_EH_REVALIDATE = (1 << 0),
|
libata: prefer hardreset
When both soft and hard resets are available, libata preferred
softreset till now. The logic behind it was to be softer to devices;
however, this doesn't really help much. Rationales for the change:
* BIOS may freeze lock certain things during boot and softreset can't
unlock those. This by itself is okay but during operation PHY event
or other error conditions can trigger hardreset and the device may
end up with different configuration.
For example, after a hardreset, previously unlockable HPA can be
unlocked resulting in different device size and thus revalidation
failure. Similar condition can occur during or after resume.
* Certain ATAPI devices require hardreset to recover after certain
error conditions. On PATA, this is done by issuing the DEVICE RESET
command. On SATA, COMRESET has equivalent effect. The problem is
that DEVICE RESET needs its own execution protocol.
For SFF controllers with bare TF access, it can be easily
implemented but more advanced controllers (e.g. ahci and sata_sil24)
require specialized implementations. Simply using hardreset solves
the problem nicely.
* COMRESET initialization sequence is the norm in SATA land and many
SATA devices don't work properly if only SRST is used. For example,
some PMPs behave this way and libata works around by always issuing
hardreset if the host supports PMP.
Like the above example, libata has developed a number of mechanisms
aiming to promote softreset to hardreset if softreset is not going
to work. This approach is time consuming and error prone.
Also, note that, dependingon how you read the specs, it could be
argued that PMP fan-out ports require COMRESET to start operation.
In fact, all the PMPs on the market except one don't work properly
if COMRESET is not issued to fan-out ports after PMP reset.
* COMRESET is an integral part of SATA connection and any working
device should be able to handle COMRESET properly. After all, it's
the way to signal hardreset during reboot. This is the most used
and recommended (at least by the ahci spec) method of resetting
devices.
So, this patch makes libata prefer hardreset over softreset by making
the following changes.
* Rename ATA_EH_RESET_MASK to ATA_EH_RESET and use it whereever
ATA_EH_{SOFT|HARD}RESET used to be used. ATA_EH_{SOFT|HARD}RESET is
now only used to tell prereset whether soft or hard reset will be
issued.
* Strip out now unneeded promote-to-hardreset logics from
ata_eh_reset(), ata_std_prereset(), sata_pmp_std_prereset() and
other places.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-01-23 08:05:14 -07:00
|
|
|
ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
|
|
|
|
ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
|
|
|
|
ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
|
2007-09-22 22:14:13 -06:00
|
|
|
ATA_EH_ENABLE_LINK = (1 << 3),
|
2008-03-27 03:37:14 -06:00
|
|
|
ATA_EH_LPM = (1 << 4), /* link power management action */
|
2008-09-21 03:54:08 -06:00
|
|
|
ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
|
2006-05-15 05:58:17 -06:00
|
|
|
|
2008-09-21 03:54:08 -06:00
|
|
|
ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
|
2008-07-31 02:02:42 -06:00
|
|
|
ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
|
|
|
|
ATA_EH_ENABLE_LINK | ATA_EH_LPM,
|
2006-05-15 05:58:17 -06:00
|
|
|
|
2006-05-15 05:58:21 -06:00
|
|
|
/* ata_eh_info->flags */
|
2006-05-31 03:27:29 -06:00
|
|
|
ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
|
2006-07-03 01:07:26 -06:00
|
|
|
ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
|
|
|
|
ATA_EHI_QUIET = (1 << 3), /* be quiet */
|
2006-05-31 03:27:29 -06:00
|
|
|
|
2007-04-22 11:41:05 -06:00
|
|
|
ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
|
|
|
|
ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
|
|
|
|
ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
|
|
|
|
ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
|
|
|
|
ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
|
2006-05-15 05:58:21 -06:00
|
|
|
|
2007-04-22 11:41:05 -06:00
|
|
|
ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
|
2006-07-10 08:18:46 -06:00
|
|
|
|
2008-10-20 23:26:39 -06:00
|
|
|
/* mask of flags to transfer *to* the slave link */
|
|
|
|
ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
|
|
|
|
|
2007-08-17 22:28:49 -06:00
|
|
|
/* max tries if error condition is still set after ->error_handler */
|
|
|
|
ATA_EH_MAX_TRIES = 5,
|
2006-05-15 05:58:12 -06:00
|
|
|
|
2006-04-02 01:54:46 -07:00
|
|
|
/* how hard are we gonna try to probe/recover devices */
|
|
|
|
ATA_PROBE_MAX_TRIES = 3,
|
2006-05-15 05:58:22 -06:00
|
|
|
ATA_EH_DEV_TRIES = 3,
|
2007-09-22 22:14:12 -06:00
|
|
|
ATA_EH_PMP_TRIES = 5,
|
|
|
|
ATA_EH_PMP_LINK_TRIES = 3,
|
|
|
|
|
2008-05-18 10:15:10 -06:00
|
|
|
SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
|
2006-05-31 03:27:48 -06:00
|
|
|
|
2008-05-19 11:17:54 -06:00
|
|
|
/* This should match the actual table size of
|
|
|
|
* ata_eh_cmd_timeout_table in libata-eh.c.
|
|
|
|
*/
|
|
|
|
ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
|
|
|
|
|
2006-09-12 09:55:12 -06:00
|
|
|
/* Horkage types. May be set by libata or controller on drives
|
|
|
|
(some horkage may be drive/controller pair dependant */
|
|
|
|
|
|
|
|
ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
|
2006-10-27 20:08:46 -06:00
|
|
|
ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
|
|
|
|
ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
|
2007-04-01 21:34:15 -06:00
|
|
|
ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
|
2007-08-28 20:58:33 -06:00
|
|
|
ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
|
2008-05-18 10:15:14 -06:00
|
|
|
ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
|
2007-09-29 02:06:48 -06:00
|
|
|
ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
|
2007-10-24 22:58:59 -06:00
|
|
|
ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
|
2007-11-05 15:58:58 -07:00
|
|
|
ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
|
2007-11-14 18:35:46 -07:00
|
|
|
ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
|
2008-08-27 07:23:18 -06:00
|
|
|
ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
|
2008-11-03 03:01:09 -07:00
|
|
|
ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
|
|
|
|
not multiple of 16 bytes */
|
2007-10-02 10:38:26 -06:00
|
|
|
|
2007-10-19 04:42:56 -06:00
|
|
|
/* DMA mask for user DMA control: User visible values; DO NOT
|
2007-10-02 10:38:26 -06:00
|
|
|
renumber */
|
|
|
|
ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
|
|
|
|
ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
|
|
|
|
ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
|
2007-12-05 00:43:06 -07:00
|
|
|
|
|
|
|
/* ATAPI command types */
|
|
|
|
ATAPI_READ = 0, /* READs */
|
|
|
|
ATAPI_WRITE = 1, /* WRITEs */
|
|
|
|
ATAPI_READ_CD = 2, /* READ CD [MSF] */
|
2008-04-02 02:35:19 -06:00
|
|
|
ATAPI_PASS_THRU = 3, /* SAT pass-thru */
|
|
|
|
ATAPI_MISC = 4, /* the rest */
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
|
|
|
|
/* Timing constants */
|
|
|
|
ATA_TIMING_SETUP = (1 << 0),
|
|
|
|
ATA_TIMING_ACT8B = (1 << 1),
|
|
|
|
ATA_TIMING_REC8B = (1 << 2),
|
|
|
|
ATA_TIMING_CYC8B = (1 << 3),
|
|
|
|
ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
|
|
|
|
ATA_TIMING_CYC8B,
|
|
|
|
ATA_TIMING_ACTIVE = (1 << 4),
|
|
|
|
ATA_TIMING_RECOVER = (1 << 5),
|
|
|
|
ATA_TIMING_CYCLE = (1 << 6),
|
|
|
|
ATA_TIMING_UDMA = (1 << 7),
|
|
|
|
ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
|
|
|
|
ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
|
|
|
|
ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
|
|
|
|
ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
2007-11-27 03:43:42 -07:00
|
|
|
enum ata_xfer_mask {
|
|
|
|
ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
|
|
|
|
<< ATA_SHIFT_PIO,
|
|
|
|
ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
|
|
|
|
<< ATA_SHIFT_MWDMA,
|
|
|
|
ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
|
|
|
|
<< ATA_SHIFT_UDMA,
|
|
|
|
};
|
|
|
|
|
2005-09-27 03:36:35 -06:00
|
|
|
enum hsm_task_states {
|
2005-09-30 05:07:39 -06:00
|
|
|
HSM_ST_IDLE, /* no command on going */
|
2007-04-01 21:28:52 -06:00
|
|
|
HSM_ST_FIRST, /* (waiting the device to)
|
|
|
|
write CDB or first data block */
|
2005-09-30 05:07:39 -06:00
|
|
|
HSM_ST, /* (waiting the device to) transfer data */
|
|
|
|
HSM_ST_LAST, /* (waiting the device to) complete command */
|
|
|
|
HSM_ST_ERR, /* error */
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
2005-10-30 02:44:42 -07:00
|
|
|
enum ata_completion_errors {
|
2006-01-22 21:09:36 -07:00
|
|
|
AC_ERR_DEV = (1 << 0), /* device reported error */
|
|
|
|
AC_ERR_HSM = (1 << 1), /* host state machine violation */
|
|
|
|
AC_ERR_TIMEOUT = (1 << 2), /* timeout */
|
|
|
|
AC_ERR_MEDIA = (1 << 3), /* media error */
|
|
|
|
AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
|
|
|
|
AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
|
|
|
|
AC_ERR_SYSTEM = (1 << 6), /* system error */
|
|
|
|
AC_ERR_INVALID = (1 << 7), /* invalid argument */
|
|
|
|
AC_ERR_OTHER = (1 << 8), /* unknown */
|
2006-11-10 02:08:10 -07:00
|
|
|
AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
|
2007-07-15 23:29:40 -06:00
|
|
|
AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
|
2005-10-30 02:44:42 -07:00
|
|
|
};
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* forward declarations */
|
|
|
|
struct scsi_device;
|
|
|
|
struct ata_port_operations;
|
|
|
|
struct ata_port;
|
2007-08-06 03:36:23 -06:00
|
|
|
struct ata_link;
|
2005-04-16 16:20:36 -06:00
|
|
|
struct ata_queued_cmd;
|
|
|
|
|
|
|
|
/* typedefs */
|
2006-01-22 21:09:36 -07:00
|
|
|
typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
|
2007-08-06 03:36:23 -06:00
|
|
|
typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
|
|
|
|
typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
|
libata: add deadline support to prereset and reset methods
Add @deadline to prereset and reset methods and make them honor it.
ata_wait_ready() which directly takes @deadline is implemented to be
used as the wait function. This patch is in preparation for EH timing
improvements.
* ata_wait_ready() never does busy sleep. It's only used from EH and
no wait in EH is that urgent. This function also prints 'be
patient' message automatically after 5 secs of waiting if more than
3 secs is remaining till deadline.
* ata_bus_post_reset() now fails with error code if any of its wait
fails. This is important because earlier reset tries will have
shorter timeout than the spec requires. If a device fails to
respond before the short timeout, reset should be retried with
longer timeout rather than silently ignoring the device.
There are three behavior differences.
1. Timeout is applied to both devices at once, not separately. This
is more consistent with what the spec says.
2. When a device passes devchk but fails to become ready before
deadline. Previouly, post_reset would just succeed and let
device classification remove the device. New code fails the
reset thus causing reset retry. After a few times, EH will give
up disabling the port.
3. When slave device passes devchk but fails to become accessible
(TF-wise) after reset. Original code disables dev1 after 30s
timeout and continues as if the device doesn't exist, while the
patched code fails reset. When this happens, new code fails
reset on whole port rather than proceeding with only the primary
device.
If the failing device is suffering transient problems, new code
retries reset which is a better behavior. If the failing device is
actually broken, the net effect is identical to it, but not to the
other device sharing the channel. In the previous code, reset would
have succeeded after 30s thus detecting the working one. In the new
code, reset fails and whole port gets disabled. IMO, it's a
pathological case anyway (broken device sharing bus with working
one) and doesn't really matter.
* ata_bus_softreset() is changed to return error code from
ata_bus_post_reset(). It used to return 0 unconditionally.
* Spin up waiting is to be removed and not converted to honor
deadline.
* To be on the safe side, deadline is set to 40s for the time being.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-02 00:50:52 -07:00
|
|
|
unsigned long deadline);
|
2007-08-06 03:36:23 -06:00
|
|
|
typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-10-24 22:58:59 -06:00
|
|
|
/*
|
|
|
|
* host pm policy: If you alter this, you also need to alter libata-scsi.c
|
|
|
|
* (for the ascii descriptions)
|
|
|
|
*/
|
|
|
|
enum link_pm {
|
|
|
|
NOT_AVAILABLE,
|
|
|
|
MIN_POWER,
|
|
|
|
MAX_PERFORMANCE,
|
|
|
|
MEDIUM_POWER,
|
|
|
|
};
|
2008-02-21 16:13:36 -07:00
|
|
|
extern struct device_attribute dev_attr_link_power_management_policy;
|
2008-09-21 03:54:08 -06:00
|
|
|
extern struct device_attribute dev_attr_unload_heads;
|
2008-06-03 11:33:55 -06:00
|
|
|
extern struct device_attribute dev_attr_em_message_type;
|
|
|
|
extern struct device_attribute dev_attr_em_message;
|
|
|
|
extern struct device_attribute dev_attr_sw_activity;
|
|
|
|
|
|
|
|
enum sw_activity {
|
|
|
|
OFF,
|
|
|
|
BLINK_ON,
|
|
|
|
BLINK_OFF,
|
|
|
|
};
|
2007-10-24 22:58:59 -06:00
|
|
|
|
2008-04-07 07:47:21 -06:00
|
|
|
#ifdef CONFIG_ATA_SFF
|
2005-04-16 16:20:36 -06:00
|
|
|
struct ata_ioports {
|
2007-01-31 23:06:36 -07:00
|
|
|
void __iomem *cmd_addr;
|
|
|
|
void __iomem *data_addr;
|
|
|
|
void __iomem *error_addr;
|
|
|
|
void __iomem *feature_addr;
|
|
|
|
void __iomem *nsect_addr;
|
|
|
|
void __iomem *lbal_addr;
|
|
|
|
void __iomem *lbam_addr;
|
|
|
|
void __iomem *lbah_addr;
|
|
|
|
void __iomem *device_addr;
|
|
|
|
void __iomem *status_addr;
|
|
|
|
void __iomem *command_addr;
|
|
|
|
void __iomem *altstatus_addr;
|
|
|
|
void __iomem *ctl_addr;
|
|
|
|
void __iomem *bmdma_addr;
|
|
|
|
void __iomem *scr_addr;
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
2008-04-07 07:47:21 -06:00
|
|
|
#endif /* CONFIG_ATA_SFF */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-08-24 01:19:22 -06:00
|
|
|
struct ata_host {
|
2005-04-16 16:20:36 -06:00
|
|
|
spinlock_t lock;
|
|
|
|
struct device *dev;
|
2007-01-31 23:06:36 -07:00
|
|
|
void __iomem * const *iomap;
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned int n_ports;
|
|
|
|
void *private_data;
|
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:49 -06:00
|
|
|
struct ata_port_operations *ops;
|
2006-03-27 10:58:20 -07:00
|
|
|
unsigned long flags;
|
2007-05-14 12:28:16 -06:00
|
|
|
#ifdef CONFIG_ATA_ACPI
|
|
|
|
acpi_handle acpi_handle;
|
|
|
|
#endif
|
2007-03-01 10:36:46 -07:00
|
|
|
struct ata_port *simplex_claimed; /* channel owning the DMA */
|
2006-06-12 08:05:38 -06:00
|
|
|
struct ata_port *ports[0];
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
struct ata_queued_cmd {
|
|
|
|
struct ata_port *ap;
|
|
|
|
struct ata_device *dev;
|
|
|
|
|
|
|
|
struct scsi_cmnd *scsicmd;
|
|
|
|
void (*scsidone)(struct scsi_cmnd *);
|
|
|
|
|
|
|
|
struct ata_taskfile tf;
|
|
|
|
u8 cdb[ATAPI_CDB_LEN];
|
|
|
|
|
|
|
|
unsigned long flags; /* ATA_QCFLAG_xxx */
|
|
|
|
unsigned int tag;
|
|
|
|
unsigned int n_elem;
|
|
|
|
|
|
|
|
int dma_dir;
|
|
|
|
|
2007-03-16 08:22:26 -06:00
|
|
|
unsigned int sect_size;
|
2005-10-05 05:13:30 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned int nbytes;
|
2008-03-18 02:47:43 -06:00
|
|
|
unsigned int extrabytes;
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned int curbytes;
|
|
|
|
|
2007-10-16 03:14:12 -06:00
|
|
|
struct scatterlist *cursg;
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned int cursg_ofs;
|
|
|
|
|
|
|
|
struct scatterlist sgent;
|
|
|
|
|
2007-12-05 00:43:11 -07:00
|
|
|
struct scatterlist *sg;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-12-05 00:38:02 -07:00
|
|
|
unsigned int err_mask;
|
2006-05-15 05:57:40 -06:00
|
|
|
struct ata_taskfile result_tf;
|
2005-04-16 16:20:36 -06:00
|
|
|
ata_qc_cb_t complete_fn;
|
|
|
|
|
|
|
|
void *private_data;
|
2007-01-30 02:18:41 -07:00
|
|
|
void *lldd_task;
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
2006-08-24 01:19:22 -06:00
|
|
|
struct ata_port_stats {
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned long unhandled_irq;
|
|
|
|
unsigned long idle_irq;
|
|
|
|
unsigned long rw_reqbuf;
|
|
|
|
};
|
|
|
|
|
2006-05-15 05:58:19 -06:00
|
|
|
struct ata_ering_entry {
|
2007-11-27 03:28:56 -07:00
|
|
|
unsigned int eflags;
|
2006-05-15 05:58:19 -06:00
|
|
|
unsigned int err_mask;
|
|
|
|
u64 timestamp;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct ata_ering {
|
|
|
|
int cursor;
|
|
|
|
struct ata_ering_entry ring[ATA_ERING_SIZE];
|
|
|
|
};
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
struct ata_device {
|
2007-08-06 03:36:22 -06:00
|
|
|
struct ata_link *link;
|
2006-05-31 03:27:32 -06:00
|
|
|
unsigned int devno; /* 0 or 1 */
|
2007-07-04 22:31:27 -06:00
|
|
|
unsigned int horkage; /* List of broken features */
|
2008-09-22 15:47:13 -06:00
|
|
|
unsigned long flags; /* ATA_DFLAG_xxx */
|
2006-05-31 03:27:40 -06:00
|
|
|
struct scsi_device *sdev; /* attached SCSI device */
|
2007-05-14 12:28:16 -06:00
|
|
|
#ifdef CONFIG_ATA_ACPI
|
|
|
|
acpi_handle acpi_handle;
|
2007-12-14 23:05:03 -07:00
|
|
|
union acpi_object *gtf_cache;
|
2007-05-14 12:28:16 -06:00
|
|
|
#endif
|
2006-05-31 03:27:32 -06:00
|
|
|
/* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
|
|
|
|
u64 n_sectors; /* size of device, if ATA */
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned int class; /* ATA_DEV_xxx */
|
2008-09-21 03:54:08 -06:00
|
|
|
unsigned long unpark_deadline;
|
2007-09-22 22:14:12 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
u8 pio_mode;
|
|
|
|
u8 dma_mode;
|
|
|
|
u8 xfer_mode;
|
|
|
|
unsigned int xfer_shift; /* ATA_SHIFT_xxx */
|
|
|
|
|
2005-10-12 01:06:27 -06:00
|
|
|
unsigned int multi_count; /* sectors count for
|
|
|
|
READ/WRITE MULTIPLE */
|
2006-02-12 07:32:59 -07:00
|
|
|
unsigned int max_sectors; /* per-device max sectors */
|
2006-02-12 07:32:58 -07:00
|
|
|
unsigned int cdb_len;
|
2005-05-12 13:29:42 -06:00
|
|
|
|
2006-03-23 22:07:50 -07:00
|
|
|
/* per-dev xfer mask */
|
2007-11-27 03:43:42 -07:00
|
|
|
unsigned long pio_mask;
|
|
|
|
unsigned long mwdma_mask;
|
|
|
|
unsigned long udma_mask;
|
2006-03-23 22:07:50 -07:00
|
|
|
|
2005-05-12 13:29:42 -06:00
|
|
|
/* for CHS addressing */
|
|
|
|
u16 cylinders; /* Number of cylinders */
|
|
|
|
u16 heads; /* Number of heads */
|
|
|
|
u16 sectors; /* Number of sectors per track */
|
2006-05-15 05:58:19 -06:00
|
|
|
|
|
|
|
/* error history */
|
libata: put some intelligence into EH speed down sequence
The current EH speed down code is more of a proof that the EH
framework is capable of adjusting transfer speed in response to error.
This patch puts some intelligence into EH speed down sequence. The
rules are..
* If there have been more than three timeout, HSM violation or
unclassified DEV errors for known supported commands during last 10
mins, NCQ is turned off.
* If there have been more than three timeout or HSM violation for known
supported command, transfer mode is slowed down. If DMA is active,
it is first slowered by one grade (e.g. UDMA133->100). If that
doesn't help, it's slowered to 40c limit (UDMA33). If PIO is
active, it's slowered by one grade first. If that doesn't help,
PIO0 is forced. Note that this rule does not change transfer mode.
DMA is never degraded into PIO by this rule.
* If there have been more than ten ATA bus, timeout, HSM violation or
unclassified device errors for known supported commands && speeding
down DMA mode didn't help, the device is forced into PIO mode. Note
that this rule is considered only for PATA devices and is pretty
difficult to trigger.
One error can only trigger one rule at a time. After a rule is
triggered, error history is cleared such that the next speed down
happens only after some number of errors are accumulated. This makes
sense because now speed down is done in bigger stride.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-02-02 00:22:31 -07:00
|
|
|
int spdn_cnt;
|
2008-04-29 15:47:34 -06:00
|
|
|
struct ata_ering ering;
|
|
|
|
|
|
|
|
union {
|
|
|
|
u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
|
|
|
|
u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
|
|
|
|
};
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
2006-05-31 03:27:32 -06:00
|
|
|
/* Offset into struct ata_device. Fields above it are maintained
|
|
|
|
* acress device init. Fields below are zeroed.
|
|
|
|
*/
|
|
|
|
#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
|
|
|
|
|
2006-05-15 05:58:21 -06:00
|
|
|
struct ata_eh_info {
|
|
|
|
struct ata_device *dev; /* offending device */
|
|
|
|
u32 serror; /* SError from LLDD */
|
|
|
|
unsigned int err_mask; /* port-wide err_mask */
|
|
|
|
unsigned int action; /* ATA_EH_* action mask */
|
2006-06-19 03:27:23 -06:00
|
|
|
unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
|
2006-05-15 05:58:21 -06:00
|
|
|
unsigned int flags; /* ATA_EHI_* flags */
|
2006-05-31 03:27:29 -06:00
|
|
|
|
|
|
|
unsigned int probe_mask;
|
|
|
|
|
2006-05-15 05:58:21 -06:00
|
|
|
char desc[ATA_EH_DESC_LEN];
|
|
|
|
int desc_len;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct ata_eh_context {
|
|
|
|
struct ata_eh_info i;
|
|
|
|
int tries[ATA_MAX_DEVICES];
|
2008-05-19 11:17:54 -06:00
|
|
|
int cmd_timeout_idx[ATA_MAX_DEVICES]
|
|
|
|
[ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
|
2006-05-31 03:27:29 -06:00
|
|
|
unsigned int classes[ATA_MAX_DEVICES];
|
|
|
|
unsigned int did_probe_mask;
|
2008-09-21 03:54:08 -06:00
|
|
|
unsigned int unloaded_mask;
|
2007-11-27 03:28:58 -07:00
|
|
|
unsigned int saved_ncq_enabled;
|
|
|
|
u8 saved_xfer_mode[ATA_MAX_DEVICES];
|
2008-05-19 11:17:52 -06:00
|
|
|
/* timestamp for the last reset attempt or success */
|
|
|
|
unsigned long last_reset;
|
2006-05-15 05:58:21 -06:00
|
|
|
};
|
|
|
|
|
2007-05-14 12:28:16 -06:00
|
|
|
struct ata_acpi_drive
|
|
|
|
{
|
|
|
|
u32 pio;
|
|
|
|
u32 dma;
|
|
|
|
} __packed;
|
|
|
|
|
|
|
|
struct ata_acpi_gtm {
|
|
|
|
struct ata_acpi_drive drive[2];
|
|
|
|
u32 flags;
|
|
|
|
} __packed;
|
|
|
|
|
2007-08-06 03:36:22 -06:00
|
|
|
struct ata_link {
|
|
|
|
struct ata_port *ap;
|
2007-08-06 03:36:23 -06:00
|
|
|
int pmp; /* port multiplier port # */
|
2007-08-06 03:36:22 -06:00
|
|
|
|
|
|
|
unsigned int active_tag; /* active tag on this link */
|
|
|
|
u32 sactive; /* active NCQ commands */
|
|
|
|
|
2007-08-06 03:36:23 -06:00
|
|
|
unsigned int flags; /* ATA_LFLAG_xxx */
|
|
|
|
|
2008-07-31 01:09:34 -06:00
|
|
|
u32 saved_scontrol; /* SControl on probe */
|
2007-08-06 03:36:22 -06:00
|
|
|
unsigned int hw_sata_spd_limit;
|
|
|
|
unsigned int sata_spd_limit;
|
|
|
|
unsigned int sata_spd; /* current SATA PHY speed */
|
|
|
|
|
|
|
|
/* record runtime error info, protected by host_set lock */
|
|
|
|
struct ata_eh_info eh_info;
|
|
|
|
/* EH context */
|
|
|
|
struct ata_eh_context eh_context;
|
|
|
|
|
|
|
|
struct ata_device device[ATA_MAX_DEVICES];
|
|
|
|
};
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
struct ata_port {
|
2006-08-24 01:19:22 -06:00
|
|
|
struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
|
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:49 -06:00
|
|
|
struct ata_port_operations *ops;
|
2006-06-22 21:46:10 -06:00
|
|
|
spinlock_t *lock;
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned long flags; /* ATA_FLAG_xxx */
|
2006-06-28 10:29:30 -06:00
|
|
|
unsigned int pflags; /* ATA_PFLAG_xxx */
|
2007-02-20 09:06:51 -07:00
|
|
|
unsigned int print_id; /* user visible unique port ID */
|
|
|
|
unsigned int port_no; /* 0 based port no. inside the host */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
struct ata_prd *prd; /* our SG list */
|
|
|
|
dma_addr_t prd_dma; /* and its DMA mapping */
|
|
|
|
|
2008-04-07 07:47:21 -06:00
|
|
|
#ifdef CONFIG_ATA_SFF
|
2005-04-16 16:20:36 -06:00
|
|
|
struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
|
2008-04-07 07:47:21 -06:00
|
|
|
#endif /* CONFIG_ATA_SFF */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
u8 ctl; /* cache of ATA control register */
|
|
|
|
u8 last_ctl; /* Cache last written value */
|
|
|
|
unsigned int pio_mask;
|
|
|
|
unsigned int mwdma_mask;
|
|
|
|
unsigned int udma_mask;
|
|
|
|
unsigned int cbl; /* cable type; ATA_CBL_xxx */
|
|
|
|
|
|
|
|
struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
|
2008-11-09 22:48:21 -07:00
|
|
|
unsigned long qc_allocated;
|
2006-05-15 06:03:43 -06:00
|
|
|
unsigned int qc_active;
|
2007-09-22 22:14:12 -06:00
|
|
|
int nr_active_links; /* #links with active qcs */
|
2006-05-15 06:03:43 -06:00
|
|
|
|
libata: implement slave_link
Explanation taken from the comment of ata_slave_link_init().
In libata, a port contains links and a link contains devices. There
is single host link but if a PMP is attached to it, there can be
multiple fan-out links. On SATA, there's usually a single device
connected to a link but PATA and SATA controllers emulating TF based
interface can have two - master and slave.
However, there are a few controllers which don't fit into this
abstraction too well - SATA controllers which emulate TF interface
with both master and slave devices but also have separate SCR
register sets for each device. These controllers need separate links
for physical link handling (e.g. onlineness, link speed) but should
be treated like a traditional M/S controller for everything else
(e.g. command issue, softreset).
slave_link is libata's way of handling this class of controllers
without impacting core layer too much. For anything other than
physical link handling, the default host link is used for both master
and slave. For physical link handling, separate @ap->slave_link is
used. All dirty details are implemented inside libata core layer.
From LLD's POV, the only difference is that prereset, hardreset and
postreset are called once more for the slave link, so the reset
sequence looks like the following.
prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
softreset(M) -> postreset(M) -> postreset(S)
Note that softreset is called only for the master. Softreset resets
both M/S by definition, so SRST on master should handle both (the
standard method will work just fine).
As slave_link excludes PMP support and only code paths which deal with
the attributes of physical link are affected, all the changes are
localized to libata.h, libata-core.c and libata-eh.c.
* ata_is_host_link() updated so that slave_link is considered as host
link too.
* iterator extended to iterate over the slave_link when using the
underbarred version.
* force param handling updated such that devno 16 is mapped to the
slave link/device.
* ata_link_on/offline() updated to return the combined result from
master and slave link. ata_phys_link_on/offline() are the direct
versions.
* EH autopsy and report are performed separately for master slave
links. Reset is udpated to implement the above described reset
sequence.
Except for reset update, most changes are minor, many of them just
modifying dev->link to ata_dev_phys_link(dev) or using phys online
test instead.
After this update, LLDs can take full advantage of per-dev SCR
registers by simply turning on slave link.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-07-31 02:02:43 -06:00
|
|
|
struct ata_link link; /* host default link */
|
|
|
|
struct ata_link *slave_link; /* see ata_slave_link_init() */
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-08-06 03:36:23 -06:00
|
|
|
int nr_pmp_links; /* nr of available PMP links */
|
|
|
|
struct ata_link *pmp_link; /* array of PMP links */
|
2007-09-22 22:14:12 -06:00
|
|
|
struct ata_link *excl_link; /* for PMP qc exclusion */
|
2007-08-06 03:36:23 -06:00
|
|
|
|
2006-08-24 01:19:22 -06:00
|
|
|
struct ata_port_stats stats;
|
|
|
|
struct ata_host *host;
|
2006-03-23 16:30:15 -07:00
|
|
|
struct device *dev;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-11-22 07:55:48 -07:00
|
|
|
void *port_task_data;
|
2006-11-22 07:54:01 -07:00
|
|
|
struct delayed_work port_task;
|
|
|
|
struct delayed_work hotplug_task;
|
2006-06-11 22:22:04 -06:00
|
|
|
struct work_struct scsi_rescan_task;
|
2006-03-04 23:29:09 -07:00
|
|
|
|
2005-09-27 03:36:35 -06:00
|
|
|
unsigned int hsm_task_state;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-01-17 17:34:42 -07:00
|
|
|
u32 msg_enable;
|
2006-01-22 21:09:37 -07:00
|
|
|
struct list_head eh_done_q;
|
2006-05-31 03:27:27 -06:00
|
|
|
wait_queue_head_t eh_wait_q;
|
2007-08-17 22:28:49 -06:00
|
|
|
int eh_tries;
|
2008-09-21 03:54:08 -06:00
|
|
|
struct completion park_req_pending;
|
2006-01-17 17:34:42 -07:00
|
|
|
|
2006-07-03 01:07:27 -06:00
|
|
|
pm_message_t pm_mesg;
|
|
|
|
int *pm_result;
|
2007-10-24 22:58:59 -06:00
|
|
|
enum link_pm pm_policy;
|
2006-07-03 01:07:27 -06:00
|
|
|
|
2007-07-15 23:29:41 -06:00
|
|
|
struct timer_list fastdrain_timer;
|
|
|
|
unsigned long fastdrain_cnt;
|
|
|
|
|
2008-06-03 11:33:55 -06:00
|
|
|
int em_message_type;
|
2005-04-16 16:20:36 -06:00
|
|
|
void *private_data;
|
2006-05-15 05:57:35 -06:00
|
|
|
|
2007-05-14 12:28:16 -06:00
|
|
|
#ifdef CONFIG_ATA_ACPI
|
|
|
|
acpi_handle acpi_handle;
|
2007-12-14 23:05:02 -07:00
|
|
|
struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
|
2007-05-14 12:28:16 -06:00
|
|
|
#endif
|
2006-05-15 05:57:35 -06:00
|
|
|
u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:49 -06:00
|
|
|
/* The following initializer overrides a method to NULL whether one of
|
|
|
|
* its parent has the method defined or not. This is equivalent to
|
|
|
|
* ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
|
|
|
|
* expression and thus can't be used as an initializer.
|
|
|
|
*/
|
|
|
|
#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
struct ata_port_operations {
|
2008-03-24 21:22:47 -06:00
|
|
|
/*
|
|
|
|
* Command execution
|
|
|
|
*/
|
|
|
|
int (*qc_defer)(struct ata_queued_cmd *qc);
|
|
|
|
int (*check_atapi_dma)(struct ata_queued_cmd *qc);
|
|
|
|
void (*qc_prep)(struct ata_queued_cmd *qc);
|
|
|
|
unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
|
2008-04-07 07:47:20 -06:00
|
|
|
bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2008-03-24 21:22:47 -06:00
|
|
|
/*
|
|
|
|
* Configuration and exception handling
|
|
|
|
*/
|
|
|
|
int (*cable_detect)(struct ata_port *ap);
|
|
|
|
unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
|
|
|
|
void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
|
|
|
|
void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
|
|
|
|
int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
|
2008-07-24 10:16:06 -06:00
|
|
|
unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2008-03-24 21:22:47 -06:00
|
|
|
void (*dev_config)(struct ata_device *dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2008-03-24 21:22:47 -06:00
|
|
|
void (*freeze)(struct ata_port *ap);
|
|
|
|
void (*thaw)(struct ata_port *ap);
|
libata: make reset related methods proper port operations
Currently reset methods are not specified directly in the
ata_port_operations table. If a LLD wants to use custom reset
methods, it should construct and use a error_handler which uses those
reset methods. It's done this way for two reasons.
First, the ops table already contained too many methods and adding
four more of them would noticeably increase the amount of necessary
boilerplate code all over low level drivers.
Second, as ->error_handler uses those reset methods, it can get
confusing. ie. By overriding ->error_handler, those reset ops can be
made useless making layering a bit hazy.
Now that ops table uses inheritance, the first problem doesn't exist
anymore. The second isn't completely solved but is relieved by
providing default values - most drivers can just override what it has
implemented and don't have to concern itself about higher level
callbacks. In fact, there currently is no driver which actually
modifies error handling behavior. Drivers which override
->error_handler just wraps the standard error handler only to prepare
the controller for EH. I don't think making ops layering strict has
any noticeable benefit.
This patch makes ->prereset, ->softreset, ->hardreset, ->postreset and
their PMP counterparts propoer ops. Default ops are provided in the
base ops tables and drivers are converted to override individual reset
methods instead of creating custom error_handler.
* ata_std_error_handler() doesn't use sata_std_hardreset() if SCRs
aren't accessible. sata_promise doesn't need to use separate
error_handlers for PATA and SATA anymore.
* softreset is broken for sata_inic162x and sata_sx4. As libata now
always prefers hardreset, this doesn't really matter but the ops are
forced to NULL using ATA_OP_NULL for documentation purpose.
* pata_hpt374 needs to use different prereset for the first and second
PCI functions. This used to be done by branching from
hpt374_error_handler(). The proper way to do this is to use
separate ops and port_info tables for each function. Converted.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:50 -06:00
|
|
|
ata_prereset_fn_t prereset;
|
|
|
|
ata_reset_fn_t softreset;
|
|
|
|
ata_reset_fn_t hardreset;
|
|
|
|
ata_postreset_fn_t postreset;
|
|
|
|
ata_prereset_fn_t pmp_prereset;
|
|
|
|
ata_reset_fn_t pmp_softreset;
|
|
|
|
ata_reset_fn_t pmp_hardreset;
|
|
|
|
ata_postreset_fn_t pmp_postreset;
|
2008-03-24 21:22:47 -06:00
|
|
|
void (*error_handler)(struct ata_port *ap);
|
|
|
|
void (*post_internal_cmd)(struct ata_queued_cmd *qc);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Optional features
|
|
|
|
*/
|
2008-07-31 02:02:40 -06:00
|
|
|
int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
|
|
|
|
int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
|
2008-03-24 21:22:47 -06:00
|
|
|
void (*pmp_attach)(struct ata_port *ap);
|
|
|
|
void (*pmp_detach)(struct ata_port *ap);
|
|
|
|
int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
|
|
|
|
void (*disable_pm)(struct ata_port *ap);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start, stop, suspend and resume
|
|
|
|
*/
|
|
|
|
int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
|
|
|
|
int (*port_resume)(struct ata_port *ap);
|
|
|
|
int (*port_start)(struct ata_port *ap);
|
|
|
|
void (*port_stop)(struct ata_port *ap);
|
|
|
|
void (*host_stop)(struct ata_host *host);
|
|
|
|
|
2008-04-07 07:47:21 -06:00
|
|
|
#ifdef CONFIG_ATA_SFF
|
2008-03-24 21:22:47 -06:00
|
|
|
/*
|
|
|
|
* SFF / taskfile oriented ops
|
|
|
|
*/
|
2008-04-07 07:47:16 -06:00
|
|
|
void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
|
|
|
|
u8 (*sff_check_status)(struct ata_port *ap);
|
|
|
|
u8 (*sff_check_altstatus)(struct ata_port *ap);
|
|
|
|
void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
|
|
|
|
void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
|
|
|
|
void (*sff_exec_command)(struct ata_port *ap,
|
|
|
|
const struct ata_taskfile *tf);
|
|
|
|
unsigned int (*sff_data_xfer)(struct ata_device *dev,
|
|
|
|
unsigned char *buf, unsigned int buflen, int rw);
|
|
|
|
u8 (*sff_irq_on)(struct ata_port *);
|
|
|
|
void (*sff_irq_clear)(struct ata_port *);
|
|
|
|
|
2008-03-24 21:22:47 -06:00
|
|
|
void (*bmdma_setup)(struct ata_queued_cmd *qc);
|
|
|
|
void (*bmdma_start)(struct ata_queued_cmd *qc);
|
|
|
|
void (*bmdma_stop)(struct ata_queued_cmd *qc);
|
|
|
|
u8 (*bmdma_status)(struct ata_port *ap);
|
2008-04-07 07:47:21 -06:00
|
|
|
#endif /* CONFIG_ATA_SFF */
|
2008-03-24 21:22:47 -06:00
|
|
|
|
2008-06-03 11:33:55 -06:00
|
|
|
ssize_t (*em_show)(struct ata_port *ap, char *buf);
|
|
|
|
ssize_t (*em_store)(struct ata_port *ap, const char *message,
|
|
|
|
size_t size);
|
|
|
|
ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
|
|
|
|
ssize_t (*sw_activity_store)(struct ata_device *dev,
|
|
|
|
enum sw_activity val);
|
2008-03-24 21:22:47 -06:00
|
|
|
/*
|
|
|
|
* Obsolete
|
2006-05-15 05:57:58 -06:00
|
|
|
*/
|
2008-03-24 21:22:47 -06:00
|
|
|
void (*phy_reset)(struct ata_port *ap);
|
|
|
|
void (*eng_timeout)(struct ata_port *ap);
|
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:49 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* ->inherits must be the last field and all the preceding
|
|
|
|
* fields must be pointers.
|
|
|
|
*/
|
|
|
|
const struct ata_port_operations *inherits;
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
struct ata_port_info {
|
2006-08-24 01:19:22 -06:00
|
|
|
unsigned long flags;
|
2007-08-06 03:36:23 -06:00
|
|
|
unsigned long link_flags;
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned long pio_mask;
|
|
|
|
unsigned long mwdma_mask;
|
|
|
|
unsigned long udma_mask;
|
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:49 -06:00
|
|
|
struct ata_port_operations *port_ops;
|
2005-11-08 07:09:44 -07:00
|
|
|
void *private_data;
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
2005-10-21 17:01:32 -06:00
|
|
|
struct ata_timing {
|
|
|
|
unsigned short mode; /* ATA mode */
|
|
|
|
unsigned short setup; /* t1 */
|
|
|
|
unsigned short act8b; /* t2 for 8-bit I/O */
|
|
|
|
unsigned short rec8b; /* t2i for 8-bit I/O */
|
|
|
|
unsigned short cyc8b; /* t0 for 8-bit I/O */
|
|
|
|
unsigned short active; /* t2 or tD */
|
|
|
|
unsigned short recover; /* t2i or tK */
|
|
|
|
unsigned short cycle; /* t0 */
|
|
|
|
unsigned short udma; /* t2CYCTYP/2 */
|
|
|
|
};
|
|
|
|
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
/*
|
|
|
|
* Core layer - drivers/ata/libata-core.c
|
|
|
|
*/
|
2006-07-03 01:07:26 -06:00
|
|
|
extern const unsigned long sata_deb_timing_normal[];
|
|
|
|
extern const unsigned long sata_deb_timing_hotplug[];
|
|
|
|
extern const unsigned long sata_deb_timing_long[];
|
|
|
|
|
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:49 -06:00
|
|
|
extern struct ata_port_operations ata_dummy_port_ops;
|
2007-04-17 08:44:07 -06:00
|
|
|
extern const struct ata_port_info ata_dummy_port_info;
|
2006-08-10 01:59:12 -06:00
|
|
|
|
2006-07-03 01:07:26 -06:00
|
|
|
static inline const unsigned long *
|
|
|
|
sata_ehc_deb_timing(struct ata_eh_context *ehc)
|
|
|
|
{
|
|
|
|
if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
|
|
|
|
return sata_deb_timing_hotplug;
|
|
|
|
else
|
|
|
|
return sata_deb_timing_normal;
|
|
|
|
}
|
2006-05-31 03:27:46 -06:00
|
|
|
|
2006-08-10 01:59:12 -06:00
|
|
|
static inline int ata_port_is_dummy(struct ata_port *ap)
|
|
|
|
{
|
|
|
|
return ap->ops == &ata_dummy_port_ops;
|
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
extern void ata_port_probe(struct ata_port *);
|
2007-08-06 03:36:23 -06:00
|
|
|
extern int sata_set_spd(struct ata_link *link);
|
2008-04-07 07:47:18 -06:00
|
|
|
extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
|
2008-04-07 07:47:19 -06:00
|
|
|
extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
|
|
|
|
int (*check_ready)(struct ata_link *link));
|
2007-08-06 03:36:23 -06:00
|
|
|
extern int sata_link_debounce(struct ata_link *link,
|
|
|
|
const unsigned long *params, unsigned long deadline);
|
|
|
|
extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
|
|
|
|
unsigned long deadline);
|
2007-08-06 03:36:23 -06:00
|
|
|
extern int sata_link_hardreset(struct ata_link *link,
|
2008-04-07 07:47:19 -06:00
|
|
|
const unsigned long *timing, unsigned long deadline,
|
|
|
|
bool *online, int (*check_ready)(struct ata_link *));
|
2008-04-07 07:47:19 -06:00
|
|
|
extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
|
|
|
|
unsigned long deadline);
|
2008-04-07 07:47:18 -06:00
|
|
|
extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern void ata_port_disable(struct ata_port *);
|
2007-10-11 15:12:35 -06:00
|
|
|
|
2007-04-17 08:44:07 -06:00
|
|
|
extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
|
2007-04-17 08:44:07 -06:00
|
|
|
extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
|
|
|
|
const struct ata_port_info * const * ppi, int n_ports);
|
libata: implement slave_link
Explanation taken from the comment of ata_slave_link_init().
In libata, a port contains links and a link contains devices. There
is single host link but if a PMP is attached to it, there can be
multiple fan-out links. On SATA, there's usually a single device
connected to a link but PATA and SATA controllers emulating TF based
interface can have two - master and slave.
However, there are a few controllers which don't fit into this
abstraction too well - SATA controllers which emulate TF interface
with both master and slave devices but also have separate SCR
register sets for each device. These controllers need separate links
for physical link handling (e.g. onlineness, link speed) but should
be treated like a traditional M/S controller for everything else
(e.g. command issue, softreset).
slave_link is libata's way of handling this class of controllers
without impacting core layer too much. For anything other than
physical link handling, the default host link is used for both master
and slave. For physical link handling, separate @ap->slave_link is
used. All dirty details are implemented inside libata core layer.
From LLD's POV, the only difference is that prereset, hardreset and
postreset are called once more for the slave link, so the reset
sequence looks like the following.
prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
softreset(M) -> postreset(M) -> postreset(S)
Note that softreset is called only for the master. Softreset resets
both M/S by definition, so SRST on master should handle both (the
standard method will work just fine).
As slave_link excludes PMP support and only code paths which deal with
the attributes of physical link are affected, all the changes are
localized to libata.h, libata-core.c and libata-eh.c.
* ata_is_host_link() updated so that slave_link is considered as host
link too.
* iterator extended to iterate over the slave_link when using the
underbarred version.
* force param handling updated such that devno 16 is mapped to the
slave link/device.
* ata_link_on/offline() updated to return the combined result from
master and slave link. ata_phys_link_on/offline() are the direct
versions.
* EH autopsy and report are performed separately for master slave
links. Reset is udpated to implement the above described reset
sequence.
Except for reset update, most changes are minor, many of them just
modifying dev->link to ata_dev_phys_link(dev) or using phys online
test instead.
After this update, LLDs can take full advantage of per-dev SCR
registers by simply turning on slave link.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-07-31 02:02:43 -06:00
|
|
|
extern int ata_slave_link_init(struct ata_port *ap);
|
2007-04-17 08:44:06 -06:00
|
|
|
extern int ata_host_start(struct ata_host *host);
|
2007-04-17 08:44:07 -06:00
|
|
|
extern int ata_host_register(struct ata_host *host,
|
|
|
|
struct scsi_host_template *sht);
|
2007-04-17 08:44:07 -06:00
|
|
|
extern int ata_host_activate(struct ata_host *host, int irq,
|
|
|
|
irq_handler_t irq_handler, unsigned long irq_flags,
|
|
|
|
struct scsi_host_template *sht);
|
2007-01-20 00:00:26 -07:00
|
|
|
extern void ata_host_detach(struct ata_host *host);
|
2006-08-24 01:19:22 -06:00
|
|
|
extern void ata_host_init(struct ata_host *, struct device *,
|
libata: implement and use ops inheritance
libata lets low level drivers build ata_port_operations table and
register it with libata core layer. This allows low level drivers
high level of flexibility but also burdens them with lots of
boilerplate entries.
This becomes worse for drivers which support related similar
controllers which differ slightly. They share most of the operations
except for a few. However, the driver still needs to list all
operations for each variant. This results in large number of
duplicate entries, which is not only inefficient but also error-prone
as it becomes very difficult to tell what the actual differences are.
This duplicate boilerplates all over the low level drivers also make
updating the core layer exteremely difficult and error-prone. When
compounded with multi-branched development model, it ends up
accumulating inconsistencies over time. Some of those inconsistencies
cause immediate problems and fixed. Others just remain there dormant
making maintenance increasingly difficult.
To rectify the problem, this patch implements ata_port_operations
inheritance. To allow LLDs to easily re-use their own ops tables
overriding only specific methods, this patch implements poor man's
class inheritance. An ops table has ->inherits field which can be set
to any ops table as long as it doesn't create a loop. When the host
is started, the inheritance chain is followed and any operation which
isn't specified is taken from the nearest ancestor which has it
specified. This operation is called finalization and done only once
per an ops table and the LLD doesn't have to do anything special about
it other than making the ops table non-const such that libata can
update it.
libata provides four base ops tables lower drivers can inherit from -
base, sata, pmp, sff and bmdma. To avoid overriding these ops
accidentaly, these ops are declared const and LLDs should always
inherit these instead of using them directly.
After finalization, all the ops table are identical before and after
the patch except for setting .irq_handler to ata_interrupt in drivers
which didn't use to. The .irq_handler doesn't have any actual effect
and the field will soon be removed by later patch.
* sata_sx4 is still using old style EH and currently doesn't take
advantage of ops inheritance.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:49 -06:00
|
|
|
unsigned long, struct ata_port_operations *);
|
2005-11-06 22:59:37 -07:00
|
|
|
extern int ata_scsi_detect(struct scsi_host_template *sht);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
|
|
|
|
extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
|
2006-08-07 13:27:31 -06:00
|
|
|
extern void ata_sas_port_destroy(struct ata_port *);
|
2006-08-24 01:19:22 -06:00
|
|
|
extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
|
2006-08-07 13:27:31 -06:00
|
|
|
struct ata_port_info *, struct Scsi_Host *);
|
|
|
|
extern int ata_sas_port_init(struct ata_port *);
|
|
|
|
extern int ata_sas_port_start(struct ata_port *ap);
|
|
|
|
extern void ata_sas_port_stop(struct ata_port *ap);
|
|
|
|
extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
|
|
|
|
extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
|
|
|
|
struct ata_port *ap);
|
2007-08-06 03:36:23 -06:00
|
|
|
extern int sata_scr_valid(struct ata_link *link);
|
|
|
|
extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
|
|
|
|
extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
|
|
|
|
extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
|
2008-07-31 02:02:42 -06:00
|
|
|
extern bool ata_link_online(struct ata_link *link);
|
|
|
|
extern bool ata_link_offline(struct ata_link *link);
|
2007-03-02 01:32:47 -07:00
|
|
|
#ifdef CONFIG_PM
|
2006-08-24 01:19:22 -06:00
|
|
|
extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
|
|
|
|
extern void ata_host_resume(struct ata_host *host);
|
2007-03-02 01:32:47 -07:00
|
|
|
#endif
|
2005-10-05 00:58:32 -06:00
|
|
|
extern int ata_ratelimit(void);
|
2006-04-11 07:22:29 -06:00
|
|
|
extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
|
2008-05-19 11:17:51 -06:00
|
|
|
unsigned long interval, unsigned long timeout);
|
2008-04-02 02:28:46 -06:00
|
|
|
extern int atapi_cmd_type(u8 opcode);
|
2007-07-15 23:29:38 -06:00
|
|
|
extern void ata_tf_to_fis(const struct ata_taskfile *tf,
|
|
|
|
u8 pmp, int is_cmd, u8 *fis);
|
2005-10-22 12:27:05 -06:00
|
|
|
extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
|
2007-11-27 03:43:42 -07:00
|
|
|
extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
|
|
|
|
unsigned long mwdma_mask, unsigned long udma_mask);
|
|
|
|
extern void ata_unpack_xfermask(unsigned long xfer_mask,
|
|
|
|
unsigned long *pio_mask, unsigned long *mwdma_mask,
|
|
|
|
unsigned long *udma_mask);
|
|
|
|
extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
|
|
|
|
extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
|
|
|
|
extern int ata_xfer_mode2shift(unsigned long xfer_mode);
|
|
|
|
extern const char *ata_mode_string(unsigned long xfer_mask);
|
|
|
|
extern unsigned long ata_id_xfermask(const u16 *id);
|
2007-10-19 04:42:56 -06:00
|
|
|
extern int ata_port_start(struct ata_port *ap);
|
2007-09-22 22:14:12 -06:00
|
|
|
extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
|
2006-03-17 16:04:03 -07:00
|
|
|
extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
|
2005-04-16 16:20:36 -06:00
|
|
|
extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
|
|
|
|
unsigned int n_elem);
|
2005-10-22 12:27:05 -06:00
|
|
|
extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
|
2007-02-20 11:01:59 -07:00
|
|
|
extern void ata_dev_disable(struct ata_device *adev);
|
2006-02-12 18:02:46 -07:00
|
|
|
extern void ata_id_string(const u16 *id, unsigned char *s,
|
|
|
|
unsigned int ofs, unsigned int len);
|
|
|
|
extern void ata_id_c_string(const u16 *id, unsigned char *s,
|
|
|
|
unsigned int ofs, unsigned int len);
|
2008-07-24 10:16:06 -06:00
|
|
|
extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
|
|
|
|
struct ata_taskfile *tf, u16 *id);
|
2006-05-15 05:58:05 -06:00
|
|
|
extern void ata_qc_complete(struct ata_queued_cmd *qc);
|
2008-04-07 07:47:20 -06:00
|
|
|
extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
|
2006-05-15 05:57:53 -06:00
|
|
|
extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
|
2005-04-16 16:20:36 -06:00
|
|
|
void (*done)(struct scsi_cmnd *));
|
|
|
|
extern int ata_std_bios_param(struct scsi_device *sdev,
|
|
|
|
struct block_device *bdev,
|
|
|
|
sector_t capacity, int geom[]);
|
|
|
|
extern int ata_scsi_slave_config(struct scsi_device *sdev);
|
2006-05-31 03:28:07 -06:00
|
|
|
extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
|
2006-05-15 06:03:48 -06:00
|
|
|
extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
|
|
|
|
int queue_depth);
|
2006-05-15 05:57:53 -06:00
|
|
|
extern struct ata_device *ata_dev_pair(struct ata_device *adev);
|
2007-08-06 03:36:23 -06:00
|
|
|
extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-03-06 03:37:56 -07:00
|
|
|
extern int ata_cable_40wire(struct ata_port *ap);
|
|
|
|
extern int ata_cable_80wire(struct ata_port *ap);
|
|
|
|
extern int ata_cable_sata(struct ata_port *ap);
|
2007-11-27 03:43:48 -07:00
|
|
|
extern int ata_cable_ignore(struct ata_port *ap);
|
2007-03-06 03:37:56 -07:00
|
|
|
extern int ata_cable_unknown(struct ata_port *ap);
|
|
|
|
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
/* Timing helpers */
|
2006-01-09 10:18:14 -07:00
|
|
|
extern unsigned int ata_pio_need_iordy(const struct ata_device *);
|
2007-11-27 03:43:39 -07:00
|
|
|
extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
|
2005-10-21 17:01:32 -06:00
|
|
|
extern int ata_timing_compute(struct ata_device *, unsigned short,
|
|
|
|
struct ata_timing *, int, int);
|
|
|
|
extern void ata_timing_merge(const struct ata_timing *,
|
|
|
|
const struct ata_timing *, struct ata_timing *,
|
|
|
|
unsigned int);
|
2007-12-18 00:33:05 -07:00
|
|
|
extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
|
2005-10-21 17:01:32 -06:00
|
|
|
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
/* PCI */
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
struct pci_dev;
|
|
|
|
|
|
|
|
struct pci_bits {
|
|
|
|
unsigned int reg; /* PCI config register to read */
|
|
|
|
unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
|
|
|
|
unsigned long mask;
|
|
|
|
unsigned long val;
|
2005-10-21 17:01:32 -06:00
|
|
|
};
|
|
|
|
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
|
|
|
|
extern void ata_pci_remove_one(struct pci_dev *pdev);
|
|
|
|
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
|
|
|
|
extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
|
|
|
|
extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
|
|
|
|
extern int ata_pci_device_resume(struct pci_dev *pdev);
|
|
|
|
#endif /* CONFIG_PM */
|
|
|
|
#endif /* CONFIG_PCI */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* ACPI - drivers/ata/libata-acpi.c
|
|
|
|
*/
|
2007-08-16 00:33:36 -06:00
|
|
|
#ifdef CONFIG_ATA_ACPI
|
2007-12-14 23:05:02 -07:00
|
|
|
static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
|
|
|
|
{
|
|
|
|
if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
|
|
|
|
return &ap->__acpi_init_gtm;
|
|
|
|
return NULL;
|
|
|
|
}
|
2007-12-14 23:04:57 -07:00
|
|
|
int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
|
|
|
|
int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
|
2007-12-18 00:33:03 -07:00
|
|
|
unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
|
|
|
|
const struct ata_acpi_gtm *gtm);
|
2007-12-18 00:33:06 -07:00
|
|
|
int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
|
2007-08-16 00:33:36 -06:00
|
|
|
#else
|
2007-12-14 23:05:02 -07:00
|
|
|
static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
|
|
|
|
{
|
|
|
|
return NULL;
|
|
|
|
}
|
2007-12-18 00:33:03 -07:00
|
|
|
|
|
|
|
static inline int ata_acpi_stm(const struct ata_port *ap,
|
|
|
|
struct ata_acpi_gtm *stm)
|
|
|
|
{
|
|
|
|
return -ENOSYS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int ata_acpi_gtm(const struct ata_port *ap,
|
|
|
|
struct ata_acpi_gtm *stm)
|
|
|
|
{
|
|
|
|
return -ENOSYS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
|
|
|
|
const struct ata_acpi_gtm *gtm)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
2007-12-18 00:33:06 -07:00
|
|
|
|
|
|
|
static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
|
|
|
|
const struct ata_acpi_gtm *gtm)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
2007-08-16 00:33:36 -06:00
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-04-02 03:51:53 -06:00
|
|
|
/*
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
* EH - drivers/ata/libata-eh.c
|
2006-04-02 03:51:53 -06:00
|
|
|
*/
|
2006-05-15 05:58:07 -06:00
|
|
|
extern void ata_port_schedule_eh(struct ata_port *ap);
|
2007-08-06 03:36:23 -06:00
|
|
|
extern int ata_link_abort(struct ata_link *link);
|
2006-05-15 05:58:07 -06:00
|
|
|
extern int ata_port_abort(struct ata_port *ap);
|
2006-05-15 05:58:09 -06:00
|
|
|
extern int ata_port_freeze(struct ata_port *ap);
|
2007-09-22 22:14:13 -06:00
|
|
|
extern int sata_async_notification(struct ata_port *ap);
|
2006-05-15 05:58:09 -06:00
|
|
|
|
|
|
|
extern void ata_eh_freeze_port(struct ata_port *ap);
|
|
|
|
extern void ata_eh_thaw_port(struct ata_port *ap);
|
2006-05-15 05:58:07 -06:00
|
|
|
|
2006-04-02 03:51:53 -06:00
|
|
|
extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
|
|
|
|
extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
|
2008-05-02 00:14:53 -06:00
|
|
|
extern void ata_eh_analyze_ncq_error(struct ata_link *link);
|
2006-04-02 03:51:53 -06:00
|
|
|
|
2006-05-31 03:27:48 -06:00
|
|
|
extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
|
|
|
|
ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
|
|
|
|
ata_postreset_fn_t postreset);
|
libata: make reset related methods proper port operations
Currently reset methods are not specified directly in the
ata_port_operations table. If a LLD wants to use custom reset
methods, it should construct and use a error_handler which uses those
reset methods. It's done this way for two reasons.
First, the ops table already contained too many methods and adding
four more of them would noticeably increase the amount of necessary
boilerplate code all over low level drivers.
Second, as ->error_handler uses those reset methods, it can get
confusing. ie. By overriding ->error_handler, those reset ops can be
made useless making layering a bit hazy.
Now that ops table uses inheritance, the first problem doesn't exist
anymore. The second isn't completely solved but is relieved by
providing default values - most drivers can just override what it has
implemented and don't have to concern itself about higher level
callbacks. In fact, there currently is no driver which actually
modifies error handling behavior. Drivers which override
->error_handler just wraps the standard error handler only to prepare
the controller for EH. I don't think making ops layering strict has
any noticeable benefit.
This patch makes ->prereset, ->softreset, ->hardreset, ->postreset and
their PMP counterparts propoer ops. Default ops are provided in the
base ops tables and drivers are converted to override individual reset
methods instead of creating custom error_handler.
* ata_std_error_handler() doesn't use sata_std_hardreset() if SCRs
aren't accessible. sata_promise doesn't need to use separate
error_handlers for PATA and SATA anymore.
* softreset is broken for sata_inic162x and sata_sx4. As libata now
always prefers hardreset, this doesn't really matter but the ops are
forced to NULL using ATA_OP_NULL for documentation purpose.
* pata_hpt374 needs to use different prereset for the first and second
PCI functions. This used to be done by branching from
hpt374_error_handler(). The proper way to do this is to use
separate ops and port_info tables for each function. Converted.
Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-03-24 21:22:50 -06:00
|
|
|
extern void ata_std_error_handler(struct ata_port *ap);
|
2006-05-15 05:58:22 -06:00
|
|
|
|
2008-03-24 21:22:49 -06:00
|
|
|
/*
|
|
|
|
* Base operations to inherit from and initializers for sht
|
|
|
|
*
|
|
|
|
* Operations
|
|
|
|
*
|
|
|
|
* base : Common to all libata drivers.
|
|
|
|
* sata : SATA controllers w/ native interface.
|
|
|
|
* pmp : SATA controllers w/ PMP support.
|
|
|
|
* sff : SFF ATA controllers w/o BMDMA support.
|
|
|
|
* bmdma : SFF ATA controllers w/ BMDMA support.
|
|
|
|
*
|
|
|
|
* sht initializers
|
|
|
|
*
|
|
|
|
* BASE : Common to all libata drivers. The user must set
|
|
|
|
* sg_tablesize and dma_boundary.
|
|
|
|
* PIO : SFF ATA controllers w/ only PIO support.
|
|
|
|
* BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
|
|
|
|
* dma_boundary are set to BMDMA limits.
|
|
|
|
* NCQ : SATA controllers supporting NCQ. The user must set
|
|
|
|
* sg_tablesize, dma_boundary and can_queue.
|
|
|
|
*/
|
|
|
|
extern const struct ata_port_operations ata_base_port_ops;
|
|
|
|
extern const struct ata_port_operations sata_port_ops;
|
2008-09-21 03:54:08 -06:00
|
|
|
extern struct device_attribute *ata_common_sdev_attrs[];
|
2008-03-24 21:22:49 -06:00
|
|
|
|
|
|
|
#define ATA_BASE_SHT(drv_name) \
|
|
|
|
.module = THIS_MODULE, \
|
|
|
|
.name = drv_name, \
|
|
|
|
.ioctl = ata_scsi_ioctl, \
|
|
|
|
.queuecommand = ata_scsi_queuecmd, \
|
|
|
|
.can_queue = ATA_DEF_QUEUE, \
|
|
|
|
.this_id = ATA_SHT_THIS_ID, \
|
|
|
|
.cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
|
|
|
|
.emulated = ATA_SHT_EMULATED, \
|
|
|
|
.use_clustering = ATA_SHT_USE_CLUSTERING, \
|
|
|
|
.proc_name = drv_name, \
|
|
|
|
.slave_configure = ata_scsi_slave_config, \
|
|
|
|
.slave_destroy = ata_scsi_slave_destroy, \
|
2008-09-21 03:54:08 -06:00
|
|
|
.bios_param = ata_std_bios_param, \
|
|
|
|
.sdev_attrs = ata_common_sdev_attrs
|
2008-03-24 21:22:49 -06:00
|
|
|
|
|
|
|
#define ATA_NCQ_SHT(drv_name) \
|
|
|
|
ATA_BASE_SHT(drv_name), \
|
|
|
|
.change_queue_depth = ata_scsi_change_queue_depth
|
|
|
|
|
2008-04-07 07:47:22 -06:00
|
|
|
/*
|
|
|
|
* PMP helpers
|
|
|
|
*/
|
2008-04-07 07:47:22 -06:00
|
|
|
#ifdef CONFIG_SATA_PMP
|
2008-04-07 07:47:22 -06:00
|
|
|
static inline bool sata_pmp_supported(struct ata_port *ap)
|
|
|
|
{
|
|
|
|
return ap->flags & ATA_FLAG_PMP;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline bool sata_pmp_attached(struct ata_port *ap)
|
|
|
|
{
|
|
|
|
return ap->nr_pmp_links != 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int ata_is_host_link(const struct ata_link *link)
|
|
|
|
{
|
libata: implement slave_link
Explanation taken from the comment of ata_slave_link_init().
In libata, a port contains links and a link contains devices. There
is single host link but if a PMP is attached to it, there can be
multiple fan-out links. On SATA, there's usually a single device
connected to a link but PATA and SATA controllers emulating TF based
interface can have two - master and slave.
However, there are a few controllers which don't fit into this
abstraction too well - SATA controllers which emulate TF interface
with both master and slave devices but also have separate SCR
register sets for each device. These controllers need separate links
for physical link handling (e.g. onlineness, link speed) but should
be treated like a traditional M/S controller for everything else
(e.g. command issue, softreset).
slave_link is libata's way of handling this class of controllers
without impacting core layer too much. For anything other than
physical link handling, the default host link is used for both master
and slave. For physical link handling, separate @ap->slave_link is
used. All dirty details are implemented inside libata core layer.
From LLD's POV, the only difference is that prereset, hardreset and
postreset are called once more for the slave link, so the reset
sequence looks like the following.
prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
softreset(M) -> postreset(M) -> postreset(S)
Note that softreset is called only for the master. Softreset resets
both M/S by definition, so SRST on master should handle both (the
standard method will work just fine).
As slave_link excludes PMP support and only code paths which deal with
the attributes of physical link are affected, all the changes are
localized to libata.h, libata-core.c and libata-eh.c.
* ata_is_host_link() updated so that slave_link is considered as host
link too.
* iterator extended to iterate over the slave_link when using the
underbarred version.
* force param handling updated such that devno 16 is mapped to the
slave link/device.
* ata_link_on/offline() updated to return the combined result from
master and slave link. ata_phys_link_on/offline() are the direct
versions.
* EH autopsy and report are performed separately for master slave
links. Reset is udpated to implement the above described reset
sequence.
Except for reset update, most changes are minor, many of them just
modifying dev->link to ata_dev_phys_link(dev) or using phys online
test instead.
After this update, LLDs can take full advantage of per-dev SCR
registers by simply turning on slave link.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-07-31 02:02:43 -06:00
|
|
|
return link == &link->ap->link || link == link->ap->slave_link;
|
2008-04-07 07:47:22 -06:00
|
|
|
}
|
2008-04-07 07:47:22 -06:00
|
|
|
#else /* CONFIG_SATA_PMP */
|
|
|
|
static inline bool sata_pmp_supported(struct ata_port *ap)
|
|
|
|
{
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline bool sata_pmp_attached(struct ata_port *ap)
|
|
|
|
{
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int ata_is_host_link(const struct ata_link *link)
|
|
|
|
{
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_SATA_PMP */
|
2008-04-07 07:47:22 -06:00
|
|
|
|
|
|
|
static inline int sata_srst_pmp(struct ata_link *link)
|
|
|
|
{
|
|
|
|
if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
|
|
|
|
return SATA_PMP_CTRL_PORT;
|
|
|
|
return link->pmp;
|
|
|
|
}
|
|
|
|
|
2006-05-15 05:57:55 -06:00
|
|
|
/*
|
|
|
|
* printk helpers
|
|
|
|
*/
|
|
|
|
#define ata_port_printk(ap, lv, fmt, args...) \
|
2007-12-14 23:04:58 -07:00
|
|
|
printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
|
2006-05-15 05:57:55 -06:00
|
|
|
|
2007-08-06 03:36:23 -06:00
|
|
|
#define ata_link_printk(link, lv, fmt, args...) do { \
|
libata: implement slave_link
Explanation taken from the comment of ata_slave_link_init().
In libata, a port contains links and a link contains devices. There
is single host link but if a PMP is attached to it, there can be
multiple fan-out links. On SATA, there's usually a single device
connected to a link but PATA and SATA controllers emulating TF based
interface can have two - master and slave.
However, there are a few controllers which don't fit into this
abstraction too well - SATA controllers which emulate TF interface
with both master and slave devices but also have separate SCR
register sets for each device. These controllers need separate links
for physical link handling (e.g. onlineness, link speed) but should
be treated like a traditional M/S controller for everything else
(e.g. command issue, softreset).
slave_link is libata's way of handling this class of controllers
without impacting core layer too much. For anything other than
physical link handling, the default host link is used for both master
and slave. For physical link handling, separate @ap->slave_link is
used. All dirty details are implemented inside libata core layer.
From LLD's POV, the only difference is that prereset, hardreset and
postreset are called once more for the slave link, so the reset
sequence looks like the following.
prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
softreset(M) -> postreset(M) -> postreset(S)
Note that softreset is called only for the master. Softreset resets
both M/S by definition, so SRST on master should handle both (the
standard method will work just fine).
As slave_link excludes PMP support and only code paths which deal with
the attributes of physical link are affected, all the changes are
localized to libata.h, libata-core.c and libata-eh.c.
* ata_is_host_link() updated so that slave_link is considered as host
link too.
* iterator extended to iterate over the slave_link when using the
underbarred version.
* force param handling updated such that devno 16 is mapped to the
slave link/device.
* ata_link_on/offline() updated to return the combined result from
master and slave link. ata_phys_link_on/offline() are the direct
versions.
* EH autopsy and report are performed separately for master slave
links. Reset is udpated to implement the above described reset
sequence.
Except for reset update, most changes are minor, many of them just
modifying dev->link to ata_dev_phys_link(dev) or using phys online
test instead.
After this update, LLDs can take full advantage of per-dev SCR
registers by simply turning on slave link.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-07-31 02:02:43 -06:00
|
|
|
if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
|
2007-12-14 23:04:58 -07:00
|
|
|
printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
|
2007-08-06 03:36:23 -06:00
|
|
|
(link)->pmp , ##args); \
|
|
|
|
else \
|
2007-12-14 23:04:58 -07:00
|
|
|
printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
|
2007-08-06 03:36:23 -06:00
|
|
|
} while(0)
|
2007-08-06 03:36:22 -06:00
|
|
|
|
2006-05-15 05:57:55 -06:00
|
|
|
#define ata_dev_printk(dev, lv, fmt, args...) \
|
2007-12-14 23:04:58 -07:00
|
|
|
printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
|
2007-08-06 03:36:23 -06:00
|
|
|
(dev)->link->pmp + (dev)->devno , ##args)
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-05-15 05:58:21 -06:00
|
|
|
/*
|
|
|
|
* ata_eh_info helpers
|
|
|
|
*/
|
2007-07-29 23:24:15 -06:00
|
|
|
extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
|
|
|
|
__attribute__ ((format (printf, 2, 3)));
|
|
|
|
extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
|
|
|
|
__attribute__ ((format (printf, 2, 3)));
|
2007-07-15 23:29:39 -06:00
|
|
|
extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
|
2006-05-15 05:58:21 -06:00
|
|
|
|
2006-07-03 01:07:26 -06:00
|
|
|
static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
|
|
|
|
{
|
2008-01-23 08:05:14 -07:00
|
|
|
ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
|
2007-07-15 23:29:40 -06:00
|
|
|
ehi->flags |= ATA_EHI_HOTPLUGGED;
|
2008-01-23 08:05:14 -07:00
|
|
|
ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
|
2006-07-03 01:07:26 -06:00
|
|
|
ehi->err_mask |= AC_ERR_ATA_BUS;
|
|
|
|
}
|
|
|
|
|
2007-08-17 22:14:55 -06:00
|
|
|
/*
|
|
|
|
* port description helpers
|
|
|
|
*/
|
|
|
|
extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
|
|
|
|
__attribute__ ((format (printf, 2, 3)));
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
|
|
|
|
const char *name);
|
|
|
|
#endif
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
static inline unsigned int ata_tag_valid(unsigned int tag)
|
|
|
|
{
|
|
|
|
return (tag < ATA_MAX_QUEUE) ? 1 : 0;
|
|
|
|
}
|
|
|
|
|
2006-05-15 05:58:02 -06:00
|
|
|
static inline unsigned int ata_tag_internal(unsigned int tag)
|
|
|
|
{
|
2008-02-28 05:43:13 -07:00
|
|
|
return tag == ATA_TAG_INTERNAL;
|
2006-05-15 05:58:02 -06:00
|
|
|
}
|
|
|
|
|
2006-06-24 05:30:19 -06:00
|
|
|
/*
|
|
|
|
* device helpers
|
|
|
|
*/
|
2006-03-31 09:38:18 -07:00
|
|
|
static inline unsigned int ata_class_enabled(unsigned int class)
|
2006-02-28 09:25:38 -07:00
|
|
|
{
|
2007-09-22 22:14:12 -06:00
|
|
|
return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
|
|
|
|
class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
|
2006-02-28 09:25:38 -07:00
|
|
|
}
|
|
|
|
|
2006-03-31 09:38:18 -07:00
|
|
|
static inline unsigned int ata_class_disabled(unsigned int class)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-09-22 22:14:12 -06:00
|
|
|
return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
|
|
|
|
class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
|
2006-03-31 09:38:18 -07:00
|
|
|
}
|
|
|
|
|
2006-04-02 01:54:46 -07:00
|
|
|
static inline unsigned int ata_class_absent(unsigned int class)
|
|
|
|
{
|
|
|
|
return !ata_class_enabled(class) && !ata_class_disabled(class);
|
|
|
|
}
|
|
|
|
|
2006-03-31 09:38:18 -07:00
|
|
|
static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
|
|
|
|
{
|
|
|
|
return ata_class_enabled(dev->class);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
|
|
|
|
{
|
|
|
|
return ata_class_disabled(dev->class);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2006-04-02 01:54:46 -07:00
|
|
|
static inline unsigned int ata_dev_absent(const struct ata_device *dev)
|
|
|
|
{
|
|
|
|
return ata_class_absent(dev->class);
|
|
|
|
}
|
|
|
|
|
2006-06-24 05:30:19 -06:00
|
|
|
/*
|
2007-08-06 03:36:23 -06:00
|
|
|
* link helpers
|
2006-06-24 05:30:19 -06:00
|
|
|
*/
|
2007-08-06 03:36:23 -06:00
|
|
|
static inline int ata_link_max_devices(const struct ata_link *link)
|
2006-06-24 05:30:19 -06:00
|
|
|
{
|
2007-08-06 03:36:23 -06:00
|
|
|
if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
|
2006-06-24 05:30:19 -06:00
|
|
|
return 2;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2007-09-22 22:14:12 -06:00
|
|
|
static inline int ata_link_active(struct ata_link *link)
|
|
|
|
{
|
|
|
|
return ata_tag_valid(link->active_tag) || link->sactive;
|
|
|
|
}
|
|
|
|
|
2008-07-31 02:02:41 -06:00
|
|
|
extern struct ata_link *__ata_port_next_link(struct ata_port *ap,
|
|
|
|
struct ata_link *link,
|
|
|
|
bool dev_only);
|
2007-08-06 03:36:23 -06:00
|
|
|
|
2008-07-31 02:02:41 -06:00
|
|
|
#define __ata_port_for_each_link(link, ap) \
|
|
|
|
for ((link) = __ata_port_next_link((ap), NULL, false); (link); \
|
|
|
|
(link) = __ata_port_next_link((ap), (link), false))
|
2007-08-06 03:36:23 -06:00
|
|
|
|
|
|
|
#define ata_port_for_each_link(link, ap) \
|
2008-07-31 02:02:41 -06:00
|
|
|
for ((link) = __ata_port_next_link((ap), NULL, true); (link); \
|
|
|
|
(link) = __ata_port_next_link((ap), (link), true))
|
2007-08-06 03:36:23 -06:00
|
|
|
|
|
|
|
#define ata_link_for_each_dev(dev, link) \
|
|
|
|
for ((dev) = (link)->device; \
|
|
|
|
(dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
|
|
|
|
(dev)++)
|
|
|
|
|
|
|
|
#define ata_link_for_each_dev_reverse(dev, link) \
|
|
|
|
for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
|
|
|
|
(dev) >= (link)->device || ((dev) = NULL); (dev)--)
|
2006-06-24 05:30:19 -06:00
|
|
|
|
2007-02-20 07:20:27 -07:00
|
|
|
/**
|
|
|
|
* ata_ncq_enabled - Test whether NCQ is enabled
|
|
|
|
* @dev: ATA device to test for
|
|
|
|
*
|
|
|
|
* LOCKING:
|
|
|
|
* spin_lock_irqsave(host lock)
|
|
|
|
*
|
|
|
|
* RETURNS:
|
|
|
|
* 1 if NCQ is enabled for @dev, 0 otherwise.
|
|
|
|
*/
|
|
|
|
static inline int ata_ncq_enabled(struct ata_device *dev)
|
|
|
|
{
|
|
|
|
return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
|
|
|
|
ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
|
|
|
|
}
|
2005-06-02 16:17:13 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
|
|
|
|
{
|
|
|
|
qc->tf.ctl |= ATA_NIEN;
|
|
|
|
}
|
|
|
|
|
2006-05-15 05:58:03 -06:00
|
|
|
static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
|
|
|
|
unsigned int tag)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
if (likely(ata_tag_valid(tag)))
|
|
|
|
return &ap->qcmd[tag];
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2006-05-15 05:58:03 -06:00
|
|
|
static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
|
|
|
|
unsigned int tag)
|
|
|
|
{
|
|
|
|
struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
|
|
|
|
|
|
|
|
if (unlikely(!qc) || !ap->ops->error_handler)
|
|
|
|
return qc;
|
|
|
|
|
|
|
|
if ((qc->flags & (ATA_QCFLAG_ACTIVE |
|
|
|
|
ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
|
|
|
|
return qc;
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2008-03-18 02:47:43 -06:00
|
|
|
static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
|
|
|
|
{
|
|
|
|
return qc->nbytes - min(qc->extrabytes, qc->nbytes);
|
|
|
|
}
|
|
|
|
|
2006-05-15 05:57:53 -06:00
|
|
|
static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
memset(tf, 0, sizeof(*tf));
|
|
|
|
|
2007-08-06 03:36:22 -06:00
|
|
|
tf->ctl = dev->link->ap->ctl;
|
2006-05-15 05:57:53 -06:00
|
|
|
if (dev->devno == 0)
|
2005-04-16 16:20:36 -06:00
|
|
|
tf->device = ATA_DEVICE_OBS;
|
|
|
|
else
|
|
|
|
tf->device = ATA_DEVICE_OBS | ATA_DEV1;
|
|
|
|
}
|
|
|
|
|
2005-11-14 12:14:16 -07:00
|
|
|
static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
|
|
|
|
{
|
2007-01-16 19:34:02 -07:00
|
|
|
qc->dma_dir = DMA_NONE;
|
2007-12-05 00:43:11 -07:00
|
|
|
qc->sg = NULL;
|
2005-11-14 12:14:16 -07:00
|
|
|
qc->flags = 0;
|
2007-10-16 03:14:12 -06:00
|
|
|
qc->cursg = NULL;
|
|
|
|
qc->cursg_ofs = 0;
|
2008-03-18 02:47:43 -06:00
|
|
|
qc->nbytes = qc->extrabytes = qc->curbytes = 0;
|
2007-01-17 11:32:12 -07:00
|
|
|
qc->n_elem = 0;
|
2005-12-05 00:38:02 -07:00
|
|
|
qc->err_mask = 0;
|
2007-03-16 08:22:26 -06:00
|
|
|
qc->sect_size = ATA_SECT_SIZE;
|
2005-11-14 12:14:16 -07:00
|
|
|
|
2006-05-15 05:57:53 -06:00
|
|
|
ata_tf_init(qc->dev, &qc->tf);
|
2006-05-15 05:57:40 -06:00
|
|
|
|
|
|
|
/* init result_tf such that it indicates normal completion */
|
|
|
|
qc->result_tf.command = ATA_DRDY;
|
|
|
|
qc->result_tf.feature = 0;
|
2005-11-14 12:14:16 -07:00
|
|
|
}
|
|
|
|
|
2005-10-22 12:27:05 -06:00
|
|
|
static inline int ata_try_flush_cache(const struct ata_device *dev)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
return ata_id_wcache_enabled(dev->id) ||
|
|
|
|
ata_id_has_flush(dev->id) ||
|
|
|
|
ata_id_has_flush_ext(dev->id);
|
|
|
|
}
|
|
|
|
|
2005-10-30 02:44:42 -07:00
|
|
|
static inline unsigned int ac_err_mask(u8 status)
|
|
|
|
{
|
2006-05-18 21:43:04 -06:00
|
|
|
if (status & (ATA_BUSY | ATA_DRQ))
|
2006-01-22 21:09:36 -07:00
|
|
|
return AC_ERR_HSM;
|
2005-10-30 02:44:42 -07:00
|
|
|
if (status & (ATA_ERR | ATA_DF))
|
|
|
|
return AC_ERR_DEV;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned int __ac_err_mask(u8 status)
|
|
|
|
{
|
|
|
|
unsigned int mask = ac_err_mask(status);
|
|
|
|
if (mask == 0)
|
|
|
|
return AC_ERR_OTHER;
|
|
|
|
return mask;
|
|
|
|
}
|
|
|
|
|
2006-04-11 11:12:34 -06:00
|
|
|
static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
|
|
|
|
{
|
2007-04-17 08:44:06 -06:00
|
|
|
return *(struct ata_port **)&host->hostdata[0];
|
2006-04-11 11:12:34 -06:00
|
|
|
}
|
|
|
|
|
2008-05-01 08:41:41 -06:00
|
|
|
static inline int ata_check_ready(u8 status)
|
|
|
|
{
|
2008-05-09 13:00:55 -06:00
|
|
|
if (!(status & ATA_BUSY))
|
|
|
|
return 1;
|
2008-05-01 08:41:41 -06:00
|
|
|
|
|
|
|
/* 0xff indicates either no device or device not ready */
|
|
|
|
if (status == 0xff)
|
|
|
|
return -ENODEV;
|
|
|
|
|
2008-05-09 13:00:55 -06:00
|
|
|
return 0;
|
2008-05-01 08:41:41 -06:00
|
|
|
}
|
|
|
|
|
2008-05-19 11:17:51 -06:00
|
|
|
static inline unsigned long ata_deadline(unsigned long from_jiffies,
|
|
|
|
unsigned long timeout_msecs)
|
|
|
|
{
|
|
|
|
return from_jiffies + msecs_to_jiffies(timeout_msecs);
|
|
|
|
}
|
|
|
|
|
2008-08-01 02:18:34 -06:00
|
|
|
/* Don't open code these in drivers as there are traps. Firstly the range may
|
|
|
|
change in future hardware and specs, secondly 0xFF means 'no DMA' but is
|
|
|
|
> UDMA_0. Dyma ddreigiau */
|
|
|
|
|
|
|
|
static inline int ata_using_mwdma(struct ata_device *adev)
|
|
|
|
{
|
|
|
|
if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
|
|
|
|
return 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int ata_using_udma(struct ata_device *adev)
|
|
|
|
{
|
|
|
|
if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
|
|
|
|
return 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int ata_dma_enabled(struct ata_device *adev)
|
|
|
|
{
|
|
|
|
return (adev->dma_mode == 0xFF ? 0 : 1);
|
|
|
|
}
|
2008-04-07 07:47:21 -06:00
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
* PMP - drivers/ata/libata-pmp.c
|
|
|
|
*/
|
2008-04-07 07:47:22 -06:00
|
|
|
#ifdef CONFIG_SATA_PMP
|
|
|
|
|
2008-04-07 07:47:21 -06:00
|
|
|
extern const struct ata_port_operations sata_pmp_port_ops;
|
|
|
|
|
|
|
|
extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
|
|
|
|
extern void sata_pmp_error_handler(struct ata_port *ap);
|
|
|
|
|
2008-04-07 07:47:22 -06:00
|
|
|
#else /* CONFIG_SATA_PMP */
|
|
|
|
|
|
|
|
#define sata_pmp_port_ops sata_port_ops
|
|
|
|
#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
|
|
|
|
#define sata_pmp_error_handler ata_std_error_handler
|
|
|
|
|
|
|
|
#endif /* CONFIG_SATA_PMP */
|
|
|
|
|
2008-04-07 07:47:21 -06:00
|
|
|
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
/**************************************************************************
|
|
|
|
* SFF - drivers/ata/libata-sff.c
|
|
|
|
*/
|
2008-04-07 07:47:21 -06:00
|
|
|
#ifdef CONFIG_ATA_SFF
|
|
|
|
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
extern const struct ata_port_operations ata_sff_port_ops;
|
|
|
|
extern const struct ata_port_operations ata_bmdma_port_ops;
|
|
|
|
|
|
|
|
/* PIO only, sg_tablesize and dma_boundary limits can be removed */
|
|
|
|
#define ATA_PIO_SHT(drv_name) \
|
|
|
|
ATA_BASE_SHT(drv_name), \
|
|
|
|
.sg_tablesize = LIBATA_MAX_PRD, \
|
|
|
|
.dma_boundary = ATA_DMA_BOUNDARY
|
|
|
|
|
|
|
|
#define ATA_BMDMA_SHT(drv_name) \
|
|
|
|
ATA_BASE_SHT(drv_name), \
|
|
|
|
.sg_tablesize = LIBATA_MAX_PRD, \
|
|
|
|
.dma_boundary = ATA_DMA_BOUNDARY
|
|
|
|
|
2008-04-07 07:47:16 -06:00
|
|
|
extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
|
|
|
|
extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
|
|
|
|
extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
|
|
|
|
extern u8 ata_sff_check_status(struct ata_port *ap);
|
2008-05-29 15:10:58 -06:00
|
|
|
extern void ata_sff_pause(struct ata_port *ap);
|
|
|
|
extern void ata_sff_dma_pause(struct ata_port *ap);
|
2008-04-07 07:47:16 -06:00
|
|
|
extern int ata_sff_busy_sleep(struct ata_port *ap,
|
|
|
|
unsigned long timeout_pat, unsigned long timeout);
|
2008-04-07 07:47:19 -06:00
|
|
|
extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
|
2008-04-07 07:47:16 -06:00
|
|
|
extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
|
|
|
|
extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
|
|
|
|
extern void ata_sff_exec_command(struct ata_port *ap,
|
|
|
|
const struct ata_taskfile *tf);
|
|
|
|
extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
unsigned char *buf, unsigned int buflen, int rw);
|
2008-04-07 07:47:16 -06:00
|
|
|
extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
unsigned char *buf, unsigned int buflen, int rw);
|
2008-04-07 07:47:16 -06:00
|
|
|
extern u8 ata_sff_irq_on(struct ata_port *ap);
|
|
|
|
extern void ata_sff_irq_clear(struct ata_port *ap);
|
|
|
|
extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
|
|
|
|
u8 status, int in_wq);
|
|
|
|
extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
|
2008-04-07 07:47:20 -06:00
|
|
|
extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
|
2008-04-07 07:47:16 -06:00
|
|
|
extern unsigned int ata_sff_host_intr(struct ata_port *ap,
|
|
|
|
struct ata_queued_cmd *qc);
|
|
|
|
extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
|
|
|
|
extern void ata_sff_freeze(struct ata_port *ap);
|
|
|
|
extern void ata_sff_thaw(struct ata_port *ap);
|
|
|
|
extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
|
|
|
|
extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
|
|
|
|
u8 *r_err);
|
2008-04-07 07:47:19 -06:00
|
|
|
extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
|
|
|
|
unsigned long deadline);
|
2008-04-07 07:47:16 -06:00
|
|
|
extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
unsigned long deadline);
|
2008-04-07 07:47:16 -06:00
|
|
|
extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
|
|
|
|
unsigned long deadline);
|
|
|
|
extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
|
|
|
|
extern void ata_sff_error_handler(struct ata_port *ap);
|
|
|
|
extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
extern int ata_sff_port_start(struct ata_port *ap);
|
2008-04-07 07:47:16 -06:00
|
|
|
extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
|
|
|
|
extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
|
|
|
|
unsigned long xfer_mask);
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
|
|
|
|
extern void ata_bmdma_start(struct ata_queued_cmd *qc);
|
|
|
|
extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
|
|
|
|
extern u8 ata_bmdma_status(struct ata_port *ap);
|
|
|
|
extern void ata_bus_reset(struct ata_port *ap);
|
|
|
|
|
|
|
|
#ifdef CONFIG_PCI
|
2008-04-07 07:47:16 -06:00
|
|
|
extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
|
|
|
|
extern int ata_pci_bmdma_init(struct ata_host *host);
|
|
|
|
extern int ata_pci_sff_init_host(struct ata_host *host);
|
|
|
|
extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
const struct ata_port_info * const * ppi,
|
|
|
|
struct ata_host **r_host);
|
2008-04-07 07:47:16 -06:00
|
|
|
extern int ata_pci_sff_activate_host(struct ata_host *host,
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
irq_handler_t irq_handler,
|
|
|
|
struct scsi_host_template *sht);
|
2008-04-07 07:47:16 -06:00
|
|
|
extern int ata_pci_sff_init_one(struct pci_dev *pdev,
|
|
|
|
const struct ata_port_info * const * ppi,
|
|
|
|
struct scsi_host_template *sht, void *host_priv);
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
#endif /* CONFIG_PCI */
|
|
|
|
|
|
|
|
/**
|
2008-04-07 07:47:16 -06:00
|
|
|
* ata_sff_busy_wait - Wait for a port status register
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
* @ap: Port to wait for.
|
|
|
|
* @bits: bits that must be clear
|
|
|
|
* @max: number of 10uS waits to perform
|
|
|
|
*
|
|
|
|
* Waits up to max*10 microseconds for the selected bits in the port's
|
|
|
|
* status register to be cleared.
|
|
|
|
* Returns final value of status register.
|
|
|
|
*
|
|
|
|
* LOCKING:
|
|
|
|
* Inherited from caller.
|
|
|
|
*/
|
2008-04-07 07:47:16 -06:00
|
|
|
static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
|
|
|
|
unsigned int max)
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
{
|
|
|
|
u8 status;
|
|
|
|
|
|
|
|
do {
|
|
|
|
udelay(10);
|
2008-04-07 07:47:16 -06:00
|
|
|
status = ap->ops->sff_check_status(ap);
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
max--;
|
|
|
|
} while (status != 0xff && (status & bits) && (max > 0));
|
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* ata_wait_idle - Wait for a port to be idle.
|
|
|
|
* @ap: Port to wait for.
|
|
|
|
*
|
|
|
|
* Waits up to 10ms for port's BUSY and DRQ signals to clear.
|
|
|
|
* Returns final value of status register.
|
|
|
|
*
|
|
|
|
* LOCKING:
|
|
|
|
* Inherited from caller.
|
|
|
|
*/
|
|
|
|
static inline u8 ata_wait_idle(struct ata_port *ap)
|
|
|
|
{
|
2008-04-07 07:47:16 -06:00
|
|
|
u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
|
|
|
|
#ifdef ATA_DEBUG
|
|
|
|
if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
|
|
|
|
ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
|
|
|
|
status);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
2008-04-07 07:47:21 -06:00
|
|
|
#endif /* CONFIG_ATA_SFF */
|
libata: reorganize SFF related stuff
* Move SFF related functions from libata-core.c to libata-sff.c.
ata_[bmdma_]sff_port_ops, ata_devchk(), ata_dev_try_classify(),
ata_std_dev_select(), ata_tf_to_host(), ata_busy_sleep(),
ata_wait_after_reset(), ata_wait_ready(), ata_bus_post_reset(),
ata_bus_softreset(), ata_bus_reset(), ata_std_softreset(),
sata_std_hardreset(), ata_fill_sg(), ata_fill_sg_dumb(),
ata_qc_prep(), ata_dump_qc_prep(), ata_data_xfer(),
ata_data_xfer_noirq(), ata_pio_sector(), ata_pio_sectors(),
atapi_send_cdb(), __atapi_pio_bytes(), atapi_pio_bytes(),
ata_hsm_ok_in_wq(), ata_hsm_qc_complete(), ata_hsm_move(),
ata_pio_task(), ata_qc_issue_prot(), ata_host_intr(),
ata_interrupt(), ata_std_ports()
* Make ata_pio_queue_task() global as it's now called from
libata-sff.c.
* Move SFF related stuff in include/linux/libata.h and
drivers/ata/libata.h into one place. While at it, move timing
constants into the global enum definition and fortify comments a
bit.
This patch strictly moves stuff around and as such doesn't cause any
functional difference.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-03-25 07:16:41 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif /* __LINUX_LIBATA_H__ */
|