The current code follows the spec but uses an overlong delay. This would
be great if the hardware did. Several vendors however forget the D7
pulldown. Fortunately 0xFF isnt a sane reset state so we can use it to
skip detection as is done in drivers/ide. (ie this is a tested solution
over a long time)
Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

sg increments the refcount of constituent pages in its higher order memory
allocations when they are about to be mapped by userspace.  This is done so
the subsequent get_page/put_page when doing the mapping and unmapping does not
free the page.

Move over to the preferred way, that is, using compound pages instead.  This
fixes a whole class of possible obscure bugs where a get_user_pages on a
constituent page may outlast the user mappings or even the driver.
Signed-off-by: NNick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Douglas Gilbert <dougg@torque.net>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

SLAB_NO_REAP is documented as an option that will cause this slab not to be
reaped under memory pressure.  However, that is not what happens.  The only
thing that SLAB_NO_REAP controls at the moment is the reclaim of the unused
slab elements that were allocated in batch in cache_reap().  Cache_reap()
is run every few seconds independently of memory pressure.

Could we remove the whole thing?  Its only used by three slabs anyways and
I cannot find a reason for having this option.

There is an additional problem with SLAB_NO_REAP.  If set then the recovery
of objects from alien caches is switched off.  Objects not freed on the
same node where they were initially allocated will only be reused if a
certain amount of objects accumulates from one alien node (not very likely)
or if the cache is explicitly shrunk.  (Strangely __cache_shrink does not
check for SLAB_NO_REAP)

Getting rid of SLAB_NO_REAP fixes the problems with alien cache freeing.
Signed-off-by: NChristoph Lameter <clameter@sgi.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Also, bump sata_vsc version.

Also, cleanup interrupt mask content and note in Kconfig that this
driver supports the Intel 31244.
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Alan noted: "bmdma may be zero but the bmdma_irq_clear function gets
called even in this case during pure PIO operation. Check we have a
bmdma before we use it."

I fixed this by adding a check for zero.  While was I there, I fixed the
non-standard indentation of the small function's code.
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

The first performs the simplex clearing relevant to some chipsets that
report simplex by default but can in fact do more if poked. The second
is used to strip DMA modes from a PCI control with no BAR4 allocation.
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NJeff Garzik <jeff@garzik.org>

This patch addresses a number of weird behaviours observed
for the sata_mv driver, by fixing an "off by one" bug in processing
of the EDMA response queue.

Basically, sata_mv was looking in the wrong place for
command results, and this produced a lot of unpredictable behaviour.
Signed-off-by: NMark Lord <mlord@pobox.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Encapsulate some of ata_scsi_slave_config so that parts
can be reused in future SAS patches.
Signed-off-by: NBrian King <brking@us.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Add some dummy noop functions for use by libata clients
that do not need to do anything. Future SAS patches will
utilize these functions.
Signed-off-by: NBrian King <brking@us.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Remove the ATA_PROT_PIO_MULT protocol.
Signed-off-by: NAlbert Lee <albertcc@tw.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Add ata_port_flush_task() to ata_exec_internal().
Signed-off-by: NAlbert Lee <albertcc@tw.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Original patch (and description) by Douglas Gilbert, with minor fixes
and API updates from me.

Changelog:
  - make existing libata VPD device identification page (0x83)
    supply the ATA serial number in the libata "vendor
    specific" designator (from Chris Paulson-Ellis)
  - add a "t10 vendor id based" designator as defined in
    SAT rev 08 (section 10.3.4.2.3) that supplies ATA
    model and serial numbers
  - make the libata VPD page 0x83 more extensible (for
    adding more designators in the future).
  - rename EVPD to VPD in various places. Enable Vital
    Product Data (EVPD) is a bit in the INQUIRY cdb.
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NUwe Zeisberger <Uwe_Zeisberger@digi.com>
Signed-off-by: NAdrian Bunk <bunk@stusta.de>

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>

Interrupt handler did not properly initialize a variable on a per-port
basis, leading to incorrect behavior on ports other than port 0.

Bug caught and fixed by Mark Lord.
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Most of the text by Mark Salyzyn <mark_salyzyn@adaptec.com>.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Acked-by: NMark Salyzyn <mark_salyzyn@adaptec.com>

This allows the removal of the contained flag and also does a bit of
class renaming (sas_rphy->sas_device).
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

I think I promised to do this two years ago

This patch adds a scsi_disk class with the cache type and FUA
parameters, so user land application can easily obtain them without
having to parse dmesg.  It also allows setting the cache type (use with
care...)

This patch is a bit dangerous because I've replaced the disk kref with a
class device reference ...
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

This complements the scsi_mode_sense() function
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

The attached patch updates the 3ware 9000 driver:

- Fix 9550SX pchip reset timeout.
- Add big endian support.
Signed-off-by: NAdam Radford <linuxraid@amcc.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Move IDENTIFY info printing from ata_dev_read_id() to
ata_dev_configure() and print only if @print_info is non-zero.  This
kills duplicate IDENTIFY info printing during probing.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

dev->id is used many times in ata_dev_configure().  Use local variable
id instead for shorter notation.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This patch moves the calling of target_destroy next to the list_del. This
closed a race being seen while doing a device add on the aic7xxx.
Signed-off-by: NMike Anderson <andmike@us.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Replace the eh_timed_out method usage with setting sdev->timeout in
slave_configure.  Also only use the extended timeout for raid volumes,
physical devices shouldn't need it.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

This patch makes expanders appear as labelled objects with properties in
the SAS tree.

I've also modified the phy code to make expander phys appear labelled by
host number, expander number and phy index.

So, for my current config, you see something like this in sysfs:

/sys/class/scsi_host/host1/device/phy-1:4/expander-1:0/phy-1-0:12/rphy-1:0-12/target1:0:1

And the expander properties are:

jejb@sparkweed> cd /sys/class/sas_expander/expander-1\:0/
jejb@sparkweed> for f in *; do echo -n $f ": "; cat $f; done
component_id : 29024
component_revision_id : 4
component_vendor_id : VITESSE
device : cat: device: Is a directory
level : 0
product_id : VSC7160 Eval Brd
product_rev : 4
uevent : cat: uevent: Permission denied
vendor_id : VITESSE
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

This moves the eh_timed_out functionality from the scsi_host_template
to the transport_template. Given that this is now a transport function,
the EH_RESET_TIMER case no longer caps the timer reschedulings. The
transport guarantees that this is not an infinite condition.
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

Check bit 2 of Word 53 for Word 88 validity before using Word 88 to
determine UDMA mask.  Note that the original xfer mask implementation
using ata_get_mode_mask() didn't consider bit 2 of Word 53.  This
patch introduces different (correct) behavior.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

ata_bus_probe() didn't set classes[] properly for port disabled case
of ->phy_reset() compatibility path.  This patch moves classes[]
initialization and normalization out of ->probe_reset block such that
it applies to both ->probe_reset and ->phy_reset paths.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

The check for a one byte message should be msg[0] == 0x55 not msg == 0x55
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

This patch fixes a NULL pointer dereference spotted by the Coverity
checker.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

The variable was dereferenced only if it was NULL (sic)...

Spotted by the Coverity checker.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

This patch fixes a NULL pointer dereference spotted by the Coverity
checker.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

The Coverity checker spotted this NULL dereference.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>