Remove some code which is unneeded if CONFIG_PM=n.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Replace pci_module_init() with pci_register_driver().
Signed-off-by: NPavel Roskin <proski@gnu.org>
Signed-off-by: NTejun Heo <htejun@gmail.com>

m15w blacklist overgrew by attributing unrelated problems to m15w
including R_ERR on DMA activate FIS errata.  This patch shrinks
sata_sil m15w blacklist such that it's as reported by Silicon Image.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Cc: Carlos Pardo <Carlos.Pardo@siliconimage.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Add suspend/sleep support.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Separate out controller initialization from sil_init_one() into
sil_init_controller().  This will be used by resume.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

ap->flags is way too clamped.  Separate out core dynamic flags to
ap->pflags.  ATA_FLAG_DISABLED is a dynamic flag but left alone as
it's referenced by a lot of LLDs and it's gonna be removed once all
LLDs are converted to new EH.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Some SATA controllers embedded in ATI IXPs seem to have broken
SATA_IRQ bit in their bmdma2 registers which is always stuck at 1.
This makes the driver believe that there has been a hotplug event and
freeze the port whenever there's an interrupt thus failing all
commands.

This patch disables SATA_IRQ for those controllers.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Update major version for libata, and several drivers.
Signed-off-by: NJeff Garzik <jeff@garzik.org>

SIEN on some 3112 controllers doesn't mask SATA IRQ properly.  IRQ
stays asserted even after SIEN is masked and IRQ is acked.  Also, even
while frozen, any SATA PHY event including hardreset raises SATA IRQ.
Clearing SError seems to be the only way to deassert SATA IRQ.

This patch makes sil_host_intr() clear SError on SATA IRQs and ignore
SATA IRQs reported while frozen so that hardreset doesn't trigger
hotplug event (which ends up hardresetting again).

In such cases, the port still gets re-frozen to minimize the danger of
screaming interrupts.  This results in one nil EH repeat on
controllers with broken SIEN but other than that does no harm.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Short-circuit interrupt handling if BMDMA2 is reported as 0xffffffff
indicating device removal.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Convert to new probing mechanism and add hotplug support by enabling
SATA IRQ for SError.N, marking ehi for hotplug and scheduling EH on
SATA IRQs.

Sil3112/3512/3114 family of controllers use COMRESET as TF clearing
point and can reliably wait for D2H FIS after COMRESET whether the FIS
is the first D2H FIS after POR or in response to the COMRESET.  Thus,
setting ATA_FLAG_HRST_TO_RESUME is enough for device detection after
hotplug.
Signed-off-by: NTejun Heo <htejun@gmail.com>

Hook transportt->user_scan() and hostt->slave_destroy().
Signed-off-by: NTejun Heo <htejun@gmail.com>

The DMA complete bit of these controllers reflects ATA IRQ status
while no DMA command is in progress.  So, we can tell whether the
controller is raising an interrupt or not in deterministic manner.
This patch gives sata_sil its own interrupt handler which behaves much
better than the original one in terms of error detection and handling.
This change is also necessary for later hotplug support.

Further improvements are possible, in both 2 and 4 ports versions, we
can get all status with only one readl and using custom bmdma
operations can further cut down register accesses.
Signed-off-by: NTejun Heo <htejun@gmail.com>

sata_sil is about to get a brand new interrupt handler.  Add relevant
constants.
Signed-off-by: NTejun Heo <htejun@gmail.com>

We need to pass the device in order to do per device checks such as
32bit I/O enables. With the changes to include dev->ap we now don't have
to add parameters however just clean them up. Also add data_xfer methods
to the existing drivers except ata_piix (which is in the other block of
patches). If you reject the piix one just add a data_xfer to it...
Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Convert sata_sil to new EH.  As these controllers have hardware
interrupt mask and are known to have screaming interrupts issues, use
hardware IRQ masking for freezing.  sil_freeze() masks interrupts for
the port and sil_thaw() unmasks them.  As ports are automatically
frozen before probing reset, there is no need to initialize interrupt
masks sil_init_onde().  Remove related code.

Other than freezing, sata_sil uses stock BMDMA EH routines.
Signed-off-by: NTejun Heo <htejun@gmail.com>

Use ATA printk helpers.
Signed-off-by: NTejun Heo <htejun@gmail.com>

Overriding the whole EH code is a per-transport, not per-host thing.
Move ->eh_strategy_handler to the transport class, same as
->eh_timed_out.

Downside is that scsi_host_alloc can't check for the total lack of EH
anymore, but the transition period from old EH where we needed it is
long gone already.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This patch renames ata_dev_present() to ata_dev_enabled() and adds
ata_dev_disabled().  This is to discern the state where a device is
present but disabled from not-present state.  This disctinction is
necessary when configuring transfer mode because device selection
timing must not be violated even if a device fails to configure.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Now that each ata_device has xfer masks, per-dev limits can be made
per-dev instead of per-port.  Make per-dev limits per-dev.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

SCSI midlayer has moved hostt->eh_timed_out to transport template.  As
libata doesn't need full-blown transport support yet, implement
minimal transport for libata.  No transport class or whatsoever, just
empty transport template with ->eh_timed_out hook.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Collect common host flags into SIL_DFL_HOST_FLAGS and add comments to
constants.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Kill SIL_FIFO_* and SIL_IDE2_BMDMA and replace them with proper
sil_port[] entry.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Use kzalloc instead of kmalloc/memset.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

All 3112's have m15w.  Replace sil_3112_m15w with sil_3112 and flag
sil_3112 with SIL_FLAG_MOD15WRITE.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Cc: Carlos Pardo <Carlos.Pardo@siliconimage.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Now unneeded ATA_FLAG_SRST sneaked into sil_3512 port info while
merging upstream-fixes.  Kill it.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Silicon Image has disclosed a new sil3114/3152 errata and workaround
which causes the controller to return R_ERR on DMA activate FIS if the
FIS is received while the next PRD is being fetched.  This patch
implements the workaround.

This errata results in lock up and doesn't trigger if m15w workaround
is in effect.  We stopped applying m15w to 3512 and 3114 in 2.6.14-rc1
which makes 3512/3114 lock up with some drives on all kernel versions
since 2.6.14-rc1 upto now (2.6.16-rc4).  This patch should fix the
regression.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

3512 is slightly different from 3112 errata-wise.  Differentiate it.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This patch renames ata_dev_id_[c_]string() to ata_id_[c_]string().
All other functions which read data from ATA ID data start with ata_id
and those two function names were getting too long.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

The previous dev->max_sectors patch made sht->max_sectors meaningless.
Kill all initializations of sht->max_sectors.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

If a low level driver wants to control max_sectors, it had to adjust
ap->host->max_sectors and set ATA_DFLAG_LOCK_SECTORS to tell
ata_scsi_slave_config not to override the limit.  This is not only
cumbersome but also incorrect for hosts which support more than one
devices per port.

This patch adds per-device ->max_sectors.  If the field is unset
(zero), libata core layer will adjust ->max_sectors according to
default rules.  If the field is set, libata honors the setting.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

Use ata_dev_id_c_string()
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

Convert sata_sil to use new reset mechanism.  sata_sil is fairly
generic and can directly use std routine.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

Make all libata low level drivers use ata_scsi_timed_out().
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>

On occasion, a user will submit a patch that enables the "mod15write"
quirk for their device.  Enabling this quirk has the effect of clamping
all ATA commands to no more than 15 sectors.  The intended use of this
quirk is to stop the controller from generating FIS's of unusual size
("but Wesley, what about the FOUS's?"), which in turn works around
problems in a <list> of hard drives.

One side effect of this quirk is greatly decreased performance.  Users
often enable the mod15write quirk to fix various system, power, chip,
and/or driver problems.  For a few rare problematic cases, enabling this
has cured lockups or data corruption.

Rather than add bogus listings to the mod15write quirk list (I get a
patch every month doing such), we add a 'slow_down' module parameter.
This allows users to employ a performance sledgehammer in the hopes
of curing a problem.  It defaults to off (0), of course.

Reflect changes in SCSI midlayer and updated to use new
ordered request implementation
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJens Axboe <axboe@suse.de>