Commit Graph

1316 Commits

Author SHA1 Message Date
Linus Torvalds
e80ab411e5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6: (36 commits)
  SCSI: convert struct class_device to struct device
  DRM: remove unused dev_class
  IB: rename "dev" to "srp_dev" in srp_host structure
  IB: convert struct class_device to struct device
  memstick: convert struct class_device to struct device
  driver core: replace remaining __FUNCTION__ occurrences
  sysfs: refill attribute buffer when reading from offset 0
  PM: Remove destroy_suspended_device()
  Firmware: add iSCSI iBFT Support
  PM: Remove legacy PM (fix)
  Kobject: Replace list_for_each() with list_for_each_entry().
  SYSFS: Explicitly include required header file slab.h.
  Driver core: make device_is_registered() work for class devices
  PM: Convert wakeup flag accessors to inline functions
  PM: Make wakeup flags available whenever CONFIG_PM is set
  PM: Fix misuse of wakeup flag accessors in serial core
  Driver core: Call device_pm_add() after bus_add_device() in device_add()
  PM: Handle device registrations during suspend/resume
  block: send disk "change" event for rescan_partitions()
  sysdev: detect multiple driver registrations
  ...

Fixed trivial conflict in include/linux/memory.h due to semaphore header
file change (made irrelevant by the change to mutex).
2008-04-21 15:49:58 -07:00
Linus Torvalds
429f731dea Merge branch 'semaphore' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc
* 'semaphore' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc:
  Deprecate the asm/semaphore.h files in feature-removal-schedule.
  Convert asm/semaphore.h users to linux/semaphore.h
  security: Remove unnecessary inclusions of asm/semaphore.h
  lib: Remove unnecessary inclusions of asm/semaphore.h
  kernel: Remove unnecessary inclusions of asm/semaphore.h
  include: Remove unnecessary inclusions of asm/semaphore.h
  fs: Remove unnecessary inclusions of asm/semaphore.h
  drivers: Remove unnecessary inclusions of asm/semaphore.h
  net: Remove unnecessary inclusions of asm/semaphore.h
  arch: Remove unnecessary inclusions of asm/semaphore.h
2008-04-21 15:41:27 -07:00
Tony Jones
ee959b00c3 SCSI: convert struct class_device to struct device
It's big, but there doesn't seem to be a way to split it up smaller...

Signed-off-by: Tony Jones <tonyj@suse.de>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-19 19:10:33 -07:00
Russell King
cf816ecb53 Merge branch 'merge-fixes' into devel 2008-04-19 17:17:34 +01:00
Russell King
adf6d34e46 Merge branch 'omap2-upstream' into devel 2008-04-19 17:17:29 +01:00
Matthew Wilcox
d3135846f6 drivers: Remove unnecessary inclusions of asm/semaphore.h
None of these files use any of the functionality promised by
asm/semaphore.h.  It's possible that they rely on it dragging in some
unrelated header file, but I can't build all these files, so we'll have
fix any build failures as they come up.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
2008-04-18 22:16:32 -04:00
Linus Torvalds
2cca775bae Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (137 commits)
  [SCSI] iscsi: bidi support for iscsi_tcp
  [SCSI] iscsi: bidi support at the generic libiscsi level
  [SCSI] iscsi: extended cdb support
  [SCSI] zfcp: Fix error handling for blocked unit for send FCP command
  [SCSI] zfcp: Remove zfcp_erp_wait from slave destory handler to fix deadlock
  [SCSI] zfcp: fix 31 bit compile warnings
  [SCSI] bsg: no need to set BSG_F_BLOCK bit in bsg_complete_all_commands
  [SCSI] bsg: remove minor in struct bsg_device
  [SCSI] bsg: use better helper list functions
  [SCSI] bsg: replace kobject_get with blk_get_queue
  [SCSI] bsg: takes a ref to struct device in fops->open
  [SCSI] qla1280: remove version check
  [SCSI] libsas: fix endianness bug in sas_ata
  [SCSI] zfcp: fix compiler warning caused by poking inside new semaphore (linux-next)
  [SCSI] aacraid: Do not describe check_reset parameter with its value
  [SCSI] aacraid: Fix down_interruptible() to check the return value
  [SCSI] sun3_scsi_vme: add MODULE_LICENSE
  [SCSI] st: rename flush_write_buffer()
  [SCSI] tgt: use KMEM_CACHE macro
  [SCSI] initio: fix big endian problems for auto request sense
  ...
2008-04-18 11:25:31 -07:00
James Bottomley
855d854a33 libata: fix boot panic with SATAPI devices on non-SFF HBAs
The kernel now panics reliably on boot if you have a SATAPI device
connected.

The problem was introduced by the libata merge trying to pull out all
the SFF code into a separate module.  Unfortunately, if you're a satapi
device you usually need to call atapi_request_sense, which has a bare
invocation of a SFF callback which is NULL on non-SFF HBAs.  Fix this by
making the call conditional.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-18 11:20:42 -07:00
Shaohua Li
48feb3c419 ata-acpi: don't call _GTF for disabled drive
I got below log after a S3 resume in a ASUS A6VC laptop. The system has
only one IDE drive. It appears there is no reason calling _GTF for
disabled drive.

ACPI Error (dsopcode-0483): Attempt to CreateField of length zero [20070126]
ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.RATA] (Node df822a7c), AE_AML_OPERAND_VALUE
ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.CHN1.DRV0._GTF] (Node df822bd0), AE_AML_OPERAND_VALUE
ata2.00: _GTF evaluation failed (AE 0x3006)
ACPI Error (dsopcode-0483): Attempt to CreateField of length zero [20070126]
ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.RATA] (Node df822a7c), AE_AML_OPERAND_VALUE
ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.IDE0.CHN1.DRV1._GTF] (Node df822b94), AE_AML_OPERAND_VALUE
ata2.01: _GTF evaluation failed (AE 0x3006)

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:56:29 -04:00
Mark Lord
094e50b2f7 sata_mv add temporary 3 second init delay for SiliconImage PMs
sata_mv does not yet fully support hotplug (coming soon, though).
This means that the driver may not find a Silicon Image port-multiplier
when first loaded, because those devices take in exceess of 3 seconds
to sync up the SATA PHY (most devices do this in mere microseconds).

So, as a short-term interim measure, here we insert a 3-second pause
on initial driver load, once per controller board (not once per port!),
to allow the Silicon Image port-multipliers to be detected later.

This will be removed again (soon!) once hotplug is fully implemented/working.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:56:25 -04:00
Mark Lord
8a74f1a468 sata_mv remove redundant edma init code
Remove unnecessary edma init code from port_start.
This sequence gets done later on the first I/O to the port.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:56:21 -04:00
Mark Lord
e49856d82a sata_mv add basic port multiplier support
Add basic port-multiplier support to sata_mv.
This works in Command-based-switching mode for Gen-II chipsets,
and in FIS-based-switching mode for Gen-IIe chipsets.

Error handling remains at the primary port level for now
(works okay, but not great).  This will get fixed in a subsequent
patch series for IRQ/EH handling fixes.  There are also some
known NCQ/PMP errata to be dealt with in the near future,
once we have this basic PMP support in place.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:56:19 -04:00
Mark Lord
02c1f32f1c sata_mv fix SOC flags, enable NCQ on SOC
The System-On-Chip (SOC) core supports all of the same
features as the other recent Marvell chips,
including NCQ and IRQ coalescing.

Fix the chip_soc flags to enable these capabilities
(note that the driver currently does nothing special
for IRQ coalescing, though).

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:56:16 -04:00
Mark Lord
40f0bc2d77 sata_mv disable hotplug for now
Disable hot plug/unplug detection in sata_mv for now.
It is currently broken, and also interferes with PMP support.

This will get fixed in a subsequent patch series.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:56:12 -04:00
Mark Lord
17c5aab5b3 sata_mv cosmetics
More cosmetic cleanups to unclutter the changes needed for PMP support.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:56:08 -04:00
Mark Lord
0d8be5cbff sata_mv hardreset rework
Rework and simplify sata_mv's hardreset code to take advantage of
libata improvements since it was first coded.

Also, get rid of the now unnecessary prereset, postreset, and phy_reset
functions.

This patch also paves the way for subsequent pmp support patches,
which will follow once this one passes muster.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:56:05 -04:00
Jeff Garzik
f3360ebffa [libata] improve Kconfig help text for new PMP, SFF options 2008-04-17 15:55:24 -04:00
Tejun Heo
4f7faa3f2b libata: make EH fail gracefully if no reset method is available
When no reset method is available, libata currently oopses.  Although
the condition can't happen unless there's a bug in a low level driver,
oopsing isn't the best way to report the error condition.  Complain,
dump stack and fail reset instead.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:44:26 -04:00
Alan Cox
b93fda1235 libata: Be a bit more slack about early devices
We have a certain number of 'ATA' emulations often on CF or other flash
devices that are at best "loosely based" on the CF 1.1 standard. These
devices report themselves as disk but don't support the ATA minimal
command set only the CF 1.1 set.

Relax the PIO checking for devices reporting ATA rev 0, or no iordy
support, or CFA. Rework the code a bit as it was already messy and this
made it quite ugly.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:44:25 -04:00
Alan Cox
f792068e43 libata: cable logic
The cable detect isolation patch inadvertently removed 40 wire short
cable handling. Put it back

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:44:25 -04:00
Tejun Heo
45db2f6c95 libata: move link onlineness check out of softreset methods
Currently, SATA softresets should do link onlineness check before
actually performing SRST protocol but it doesn't really belong to
softreset.

This patch moves onlineness check in softreset to ata_eh_reset() and
ata_eh_followup_srst_needed() to clean up code and help future sata_mv
changes which need clear separation between SCR and TF accesses.

sata_fsl is peculiar in that its softreset really isn't softreset but
combination of hardreset and softreset.  This patch adds dummy private
->prereset to keep the current behavior but the driver really should
implement separate hard and soft resets and return -EAGAIN from
hardreset if it should be follwed by softreset.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:44:25 -04:00
Tejun Heo
2a0c15ca39 libata: kill dead code paths in reset path
Some code paths which had been made obsolete by recent reset
simplification were still around.  Kill them.

* ata_eh_reset() checked for ATA_DEV_UNKNOWN to determine
  classification failure.  This is no longer applicable.

* ata_do_reset() should convert ATA_DEV_UNKNOWN to ATA_DEV_NONE
  regardless of reset result (e.g. -EAGAIN).

* LLDs don't need to convert ATA_DEV_UNKNOWN to ATA_DEV_NONE.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-04-17 15:44:25 -04:00
Stephen Rothwell
e50e3ce5e7 pata_scc: fix build breakage
drivers/ata/pata_scc.c: In function 'scc_bus_softreset':
drivers/ata/pata_scc.c:594: error: 'deadlien' undeclared (first use in this function)
drivers/ata/pata_scc.c:594: error: (Each undeclared identifier is reported only once
drivers/ata/pata_scc.c:594: error: for each function it appears in.)

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-04-17 15:44:25 -04:00
Tejun Heo
88fcd56275 libata: make PMP support optional
Make PMP support optional by adding CONFIG_SATA_PMP and leaving out
libata-pmp.c if it isn't set.  PMP helpers return constant values if
PMP support is not enabled and PMP declarations alias non-PMP
counterparts.  This makes the compiler to leave out PMP related part
out and LLDs to use non-PMP counterparts automatically.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:25 -04:00
Tejun Heo
071f44b1d2 libata: implement PMP helpers
Implement helpers to test whether PMP is supported, attached and
determine pmp number to use when issuing SRST to a link.  While at it,
move ata_is_host_link() so that it's together with the two new PMP
helpers.

This change simplifies LLDs and helps making PMP support optional.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:25 -04:00
Tejun Heo
48515f6c00 libata: separate PMP support code from core code
Most of PMP support code is already in libata-pmp.c.  All that are in
libata-core.c are sata_pmp_port_ops and EXPORTs.  Move them to
libata-pmp.c.  Also, collect PMP related prototypes and declarations
in header files and move them right above of SFF stuff.

This change is to make PMP support optional.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:25 -04:00
Tejun Heo
127102aea2 libata: make SFF support optional
Now that SFF support is completely separated out from the core layer,
it can be made optional.  Add CONFIG_ATA_SFF and let SFF drivers
depend on it.  If CONFIG_ATA_SFF isn't set, all codes in libata-sff.c
and data structures for SFF support are disabled.  This saves good
number of bytes for small systems.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:24 -04:00
Tejun Heo
350756f6da libata: don't use ap->ioaddr in non-SFF drivers
ap->ioaddr is to carry addresses for TF and BMDMA registers of a SFF
controller, don't abuse it in non-SFF controllers.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:24 -04:00
Tejun Heo
182d7bbac3 libata: clean up dummy port_ops
Now that SFF assumptions are removed from core layer, dummy port_ops
can be slimmed down.  Chop it down.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:24 -04:00
Tejun Heo
c9f75b04ed libata: kill ata_noop_dev_select()
Now that SFF assumptions are separated out from non-SFF reset
sequence, port_ops->sff_dev_select() is no longer necessary for
non-SFF controllers.  Kill ata_noop_dev_select() and ->sff_dev_select
initialization from base and other non-SFF port_ops.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:24 -04:00
Tejun Heo
520d06f92b libata: remove check_status from non-SFF drivers
Now that all SFF stuff is separated out of core layer, core layer
doesn't call ops->[alt_]check_status().  In fact, no one calls them
for non-SFF drivers anymore.  Kill them.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:24 -04:00
Tejun Heo
4c9bf4e799 libata: replace tf_read with qc_fill_rtf for non-SFF drivers
Now that all SFF stuff is separated out of core layer, core layer
doesn't call ops->tf_read directly.  It gets called only via
ops->qc_fill_rtf() for non-SFF drivers.  This patch directly
implements private ops->qc_fill_rtf() for non-SFF controllers and kill
ops->tf_read().

This is much cleaner for non-SFF controllers as some of them have to
cache SFF register values in private data structure and report the
cached values via ops->tf_read().  Also, ops->tf_read() gets nasty for
controllers which don't have clear notion of TF registers when
operation is not in progress.

As this change makes default ops->qc_fill_rtf unnecessary, move
ata_sff_qc_fill_rtf() form ata_base_port_ops to ata_sff_port_ops where
it belongs.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:23 -04:00
Tejun Heo
79f97dadfe libata: drop @finish_qc from ata_qc_complete_multiple()
ata_qc_complete_multiple() took @finish_qc and called it on every qc
before completing it.  This was to give opportunity to update TF cache
before ata_qc_complete() tries to fill result_tf.  Now that result TF
is a separate operation, this is no longer necessary.

Update sata_sil24, which was the only user of this mechanism, such
that it implements its own ops->qc_fill_rtf() and drop @finish_qc from
ata_qc_complete_multiple().

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:23 -04:00
Tejun Heo
22183bf569 libata: add qc_fill_rtf port operation
On command completion, ata_qc_complete() directly called ops->tf_read
to fill qc->result_tf.  This patch adds ops->qc_fill_rtf to replace
hardcoded ops->tf_read usage.

ata_sff_qc_fill_rtf() which uses ops->tf_read to fill result_tf is
implemented and set in ata_base_port_ops and other ops tables which
don't inherit from ata_base_port_ops, so this patch doesn't introduce
any behavior change.

ops->qc_fill_rtf() is similar to ops->sff_tf_read() but can only be
called when a command finishes.  As some non-SFF controllers don't
have TF registers defined unless they're associated with in-flight
commands, this limited operation makes life easier for those drivers
and help lifting SFF assumptions from libata core layer.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:23 -04:00
Tejun Heo
305d2a1ab1 libata: unify mechanism to request follow-up SRST
Previously, there were two ways to trigger follow-up SRST from
hardreset method - returning -EAGAIN and leaving all device classes
unmodified.  Drivers never used the latter mechanism and the only use
case for the former was when hardreset couldn't classify.

Drop the latter mechanism and let -EAGAIN mean "perform follow-up SRST
if classification is required".  This change removes unnecessary
follow-up SRSTs and simplifies reset implementations.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:23 -04:00
Tejun Heo
5958e3025f libata: move PMP SCR access failure during reset to ata_eh_reset()
If PMP fan-out reset fails and SCR isn't accessible, PMP should be
reset.  This used to be tested by sata_pmp_std_hardreset() and
communicated to EH by -ERESTART.  However, this logic is generic and
doesn't really have much to do with specific hardreset implementation.

This patch moves SCR access failure detection logic to ata_eh_reset()
where it belongs.  As this makes sata_pmp_std_hardreset() identical to
sata_std_hardreset(), the function is killed and replaced with the
standard method.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:23 -04:00
Tejun Heo
ac371987a8 libata: clear SError after link resume
SError used to be cleared in ->postreset.  This has small hotplug race
condition.  If a device is plugged in after reset is complete but
postreset hasn't run yet, its hotplug event gets lost when SError is
cleared.  This patch makes sata_link_resume() clear SError.  This
kills the race condition and makes a lot of sense as some PMP and host
PHYs don't work properly without SError cleared.

This change makes sata_pmp_std_{pre|post}_reset()'s unnecessary as
they become identical to ata_std counterparts.  It also simplifies
sata_pmp_hardreset() and ahci_vt8251_hardreset().

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:23 -04:00
Tejun Heo
57c9efdfb3 libata: implement and use sata_std_hardreset()
Implement sata_std_hardreset(), which simply wraps around
sata_link_hardreset().  sata_std_hardreset() becomes new standard
hardreset method for sata_port_ops and sata_sff_hardreset() moves from
ata_base_port_ops to ata_sff_port_ops, which is where it really
belongs.

ata_is_builtin_hardreset() is added so that both
ata_std_error_handler() and ata_sff_error_handler() skip both builtin
hardresets if SCR isn't accessible.

piix_sidpr_hardreset() in ata_piix.c is identical to
sata_std_hardreset() in functionality and got replaced with the
standard function.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:23 -04:00
Tejun Heo
9dadd45b24 libata: move generic hardreset code from sata_sff_hardreset() to sata_link_hardreset()
sata_sff_hardreset() contains link readiness wait logic which isn't
SFF specific.  Move that part into sata_link_hardreset(), which now
takes two more parameters - @online and @check_ready.  Both are
optional.  The former is out parameter for link onlineness after
reset.  The latter is used to wait for link readiness after hardreset.

Users of sata_link_hardreset() is updated to use new funtionality and
ahci_hardreset() is updated to use sata_link_hardreset() instead of
sata_sff_hardreset().  This doesn't really cause any behavior change.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:22 -04:00
Tejun Heo
a89611e848 ahci: use ata_wait_after_reset() instead of ata_sff_wait_ready()
Implement ahci_check_ready() and replace ata_sff_wait_after_reset()
with ata_wait_after_reset().  As ahci was faking TF access, this
change doesn't result in any functional difference.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:22 -04:00
Tejun Heo
aa2731ad9a libata: separate out ata_wait_ready() and implement ata_wait_after_reset()
Factor out waiting logic (which is common to all ATA controllers) from
ata_sff_wait_ready() into ata_wait_ready().  ata_wait_ready() takes
@check_ready function pointer and uses it to poll for readiness.  This
allows non-SFF controllers to use ata_wait_ready() to wait for link
readiness.

This patch also implements ata_wait_after_reset() - generic version of
ata_sff_wait_after_reset() - using ata_wait_ready().

ata_sff_wait_ready() is reimplemented using ata_wait_ready() and
ata_sff_check_ready().  Functionality remains the same.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:22 -04:00
Tejun Heo
705e76beb9 libata: restructure SFF post-reset readiness waits
Previously, post-softreset readiness is waited as follows.

1. ata_sff_wait_after_reset() waits for 150ms and then for
   ATA_TMOUT_FF_WAIT if status is 0xff and other conditions meet.

2. ata_bus_softreset() finishes with -ENODEV if status is still 0xff.
   If not, continue to #3.

3. ata_bus_post_reset() waits readiness of dev0 and/or dev1 depending
   on devmask using ata_sff_wait_ready().

And for post-hardreset readiness,

1. ata_sff_wait_after_reset() waits for 150ms and then for
   ATA_TMOUT_FF_WAIT if status is 0xff and other conditions meet.

2. sata_sff_hardreset waits for device readiness using
   ata_sff_wait_ready().

This patch merges and unifies post-reset readiness waits into
ata_sff_wait_ready() and ata_sff_wait_after_reset().

ATA_TMOUT_FF_WAIT handling is merged into ata_sff_wait_ready().  If TF
status is 0xff, link status is unknown and the port is SATA, it will
continue polling till ATA_TMOUT_FF_WAIT.

ata_sff_wait_after_reset() is updated to perform the following steps.

1. waits for 150ms.

2. waits for dev0 readiness using ata_sff_wait_ready().  Note that
   this is done regardless of devmask, as ata_sff_wait_ready() handles
   0xff status correctly, this preserves the original behavior except
   that it may wait longer after softreset if link is online but
   status is 0xff.  This behavior change is very unlikely to cause any
   actual difference and is intended.  It brings softreset behavior to
   that of hardreset.

3. waits for dev1 readiness just the same way ata_bus_post_reset() did.

Now both soft and hard resets call ata_sff_wait_after_reset() after
reset to wait for readiness after resets.  As
ata_sff_wait_after_reset() contains calls to ->sff_dev_select(),
explicit call near the end of sata_sff_hardreset() is removed.

This change makes reset implementation simpler and more consistent.

While at it, make the magical 150ms wait post-reset wait duration a
constant and ata_sff_wait_ready() and ata_sff_wait_after_reset() take
@link instead of @ap.  This is to make them consistent with other
reset helpers and ease core changes.

pata_scc is updated accordingly.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:22 -04:00
Tejun Heo
203c75b824 libata: separate out ata_std_postreset() from ata_sff_postreset()
Separate out generic ATA portion from ata_sff_postreset() into
ata_std_postreset() and implement ata_sff_postreset() using the std
version.

ata_base_port_ops now has ata_std_postreset() for its postreset and
ata_sff_port_ops overrides it to ata_sff_postreset().

This change affects pdc_adma, ahci, sata_fsl and sata_sil24.  pdc_adma
now specifies postreset to ata_sff_postreset() explicitly.  sata_fsl
and sata_sil24 now use ata_std_postreset() which makes no difference
to them.  ahci now calls ata_std_postreset() from its own postreset
method, which causes no behavior difference.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:22 -04:00
Tejun Heo
0aa1113d54 libata: separate out ata_std_prereset() from ata_sff_prereset()
Separate out generic ATA portion from ata_sff_prereset() into
ata_std_prereset() and implement ata_sff_prereset() using the std
version.  Waiting for device readiness is the only SFF specific part.

ata_base_port_ops now has ata_std_prereset() for its prereset and
ata_sff_port_ops overrides it to ata_sff_prereset().  This change can
affect pdc_adma, ahci, sata_fsl and sata_sil24.  pdc_adma implements
its own prereset using ata_sff_prereset() and the rest has hardreset
and thus are unaffected by this change.

This change reflects real world situation.  There is no generic way to
wait for device readiness for non-SFF controllers and some of them
don't have any mechanism for that.  Non-sff drivers which don't have
hardreset should wrap ata_std_prereset() and wait for device readiness
itself but there's no such driver now and isn't likely to be popular
in the future either.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:22 -04:00
Tejun Heo
288623a06c libata: clean up port_ops->sff_irq_clear()
->sff_irq_clear() is called only from SFF interrupt handler, so there
is no reason to initialize it for non-SFF controllers.  Also,
ata_sff_irq_clear() can handle both BMDMA and non-BMDMA SFF
controllers.

This patch kills ata_noop_irq_clear() and removes it from base
port_ops and sets ->sff_irq_clear to ata_sff_irq_clear() in sff
port_ops instead of bmdma port_ops.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:22 -04:00
Tejun Heo
5682ed33aa libata: rename SFF port ops
Add sff_ prefix to SFF specific port ops.

This rename is in preparation of separating SFF support out of libata
core layer.  This patch strictly renames ops and doesn't introduce any
behavior difference.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:22 -04:00
Tejun Heo
9363c3825e libata: rename SFF functions
SFF functions have confusing names.  Some have sff prefix, some have
bmdma, some std, some pci and some none.  Unify the naming by...

* SFF functions which are common to both BMDMA and non-BMDMA are
  prefixed with ata_sff_.

* SFF functions which are specific to BMDMA are prefixed with
  ata_bmdma_.

* SFF functions which are specific to PCI but apply to both BMDMA and
  non-BMDMA are prefixed with ata_pci_sff_.

* SFF functions which are specific to PCI and BMDMA are prefixed with
  ata_pci_bmdma_.

* Drop generic prefixes from LLD specific routines.  For example,
  bfin_std_dev_select -> bfin_dev_select.

The following renames are noteworthy.

  ata_qc_issue_prot() -> ata_sff_qc_issue()
  ata_pci_default_filter() -> ata_bmdma_mode_filter()
  ata_dev_try_classify() -> ata_sff_dev_classify()

This rename is in preparation of separating SFF support out of libata
core layer.  This patch strictly renames functions and doesn't
introduce any behavior difference.

Signed-off-by: Tejun Heo <htejun@gmail.com>
2008-04-17 15:44:21 -04:00
Mark Lord
b67a1064cb sata_mv fix ifctl handling
Fix handling of the SATA_INTERFACE_CFG register to match datasheet requirements.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-04-17 15:44:21 -04:00
Mark Lord
b562468cc3 sata_mv clean up mv_stop_edma usage
Clean up uses of mv_stop_edma{_engine}() to match datasheet requirements.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-04-17 15:44:21 -04:00
Mark Lord
e12bef50b7 sata_mv cosmetic fixes
Various cosmetic fixes in preparation for real code changes later on.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2008-04-17 15:44:21 -04:00