History log of /drivers/infiniband/core/cm.c
Revision Date Author Comments
0f29b46d49b0ca50536632c6a33986c3171f5ea1 09-Aug-2014 Ira Weiny <ira.weiny@intel.com> IB/mad: add new ioctl to ABI to support new registration options

Registrations options are specified through flags. Definitions of flags will
be in subsequent patches.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
b2853fd6c2d0f383dbdf7427e263eb576a633867 27-Mar-2014 Moni Shoua <monis@mellanox.com> IB/core: Don't resolve passive side RoCE L2 address in CMA REQ handler

The code that resolves the passive side source MAC within the rdma_cm
connection request handler was both redundant and buggy, so remove it.

It was redundant since later, when an RC QP is modified to RTR state,
the resolution will take place in the ib_core module. It was buggy
because this callback also deals with UD SIDR exchange, for which we
incorrectly looked at the REQ member of the CM event and dereferenced
a random value.

Fixes: dd5f03beb4f7 ("IB/core: Ethernet L2 attributes in verbs/cm structures")
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
990acea616e99355703b503c1e50fb9c7ddff6b9 16-Jan-2014 Wei Yongjun <yongjun_wei@trendmicro.com.cn> IB/cm: Fix missing unlock on error in cm_init_qp_rtr_attr()

Add the missing unlock before return from function cm_init_qp_rtr_attr()
in the error handling case.

Fixes: dd5f03beb4f7 ("IB/core: Ethernet L2 attributes in verbs/cm structures")
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Roland Dreier <roland@purestorage.com>
dd5f03beb4f76ae65d76d8c22a8815e424fc607c 12-Dec-2013 Matan Barak <matanb@mellanox.com> IB/core: Ethernet L2 attributes in verbs/cm structures

This patch add the support for Ethernet L2 attributes in the
verbs/cm/cma structures.

When dealing with L2 Ethernet, we should use smac, dmac, vlan ID and priority
in a similar manner that the IB L2 (and the L4 PKEY) attributes are used.

Thus, those attributes were added to the following structures:

* ib_ah_attr - added dmac
* ib_qp_attr - added smac and vlan_id, (sl remains vlan priority)
* ib_wc - added smac, vlan_id
* ib_sa_path_rec - added smac, dmac, vlan_id
* cm_av - added smac and vlan_id

For the path record structure, extra care was taken to avoid the new
fields when packing it into wire format, so we don't break the IB CM
and SA wire protocol.

On the active side, the CM fills. its internal structures from the
path provided by the ULP. We add there taking the ETH L2 attributes
and placing them into the CM Address Handle (struct cm_av).

On the passive side, the CM fills its internal structures from the WC
associated with the REQ message. We add there taking the ETH L2
attributes from the WC.

When the HW driver provides the required ETH L2 attributes in the WC,
they set the IB_WC_WITH_SMAC and IB_WC_WITH_VLAN flags. The IB core
code checks for the presence of these flags, and in their absence does
address resolution from the ib_init_ah_from_wc() helper function.

ib_modify_qp_is_ok is also updated to consider the link layer. Some
parameters are mandatory for Ethernet link layer, while they are
irrelevant for IB. Vendor drivers are modified to support the new
function signature.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
ab626d1a68d1aee19a5c7d889b9fbeace6a92b41 15-Nov-2013 Zhao Hongjiang <zhaohongjiang@huawei.com> IB/cm: Convert to using idr_alloc_cyclic()

Commit 3e6628c4b347 ("idr: introduce idr_alloc_cyclic()") adds a new
idr_alloc_cyclic() routine and converts several of these users to it.
This is just a missed one - add it.

Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
e8c8d1bc063bc88cfa1356266027b5075d3a82d7 28-Feb-2013 Tejun Heo <tj@kernel.org> idr: remove MAX_IDR_MASK and move left MAX_IDR_* into idr.c

MAX_IDR_MASK is another weirdness in the idr interface. As idr covers
whole positive integer range, it's defined as 0x7fffffff or INT_MAX.

Its usage in idr_find(), idr_replace() and idr_remove() is bizarre.
They basically mask off the sign bit and operate on the rest, so if
the caller, by accident, passes in a negative number, the sign bit
will be masked off and the remaining part will be used as if that was
the input, which is worse than crashing.

The constant is visible in idr.h and there are several users in the

* drivers/i2c/i2c-core.c:i2c_add_numbered_adapter()

Basically used to test if adap->nr is a negative number which isn't
-1 and returns -EINVAL if so. idr_alloc() already has negative
@start checking (w/ WARN_ON_ONCE), so this can go away.

* drivers/infiniband/core/cm.c:cm_alloc_id()

Used to wrap cyclic @start. Can be replaced with max(next, 0).
Note that this type of cyclic allocation using idr is buggy. These
are prone to spurious -ENOSPC failure after the first wraparound.

* fs/super.c:get_anon_bdev()

The ID allocated from ida is masked off before being tested whether
it's inside valid range. ida allocated ID can never be a negative
number and the masking is unnecessary.

Update idr_*() functions to fail with -EINVAL when negative @id is
specified and update other MAX_IDR_MASK users as described above.

This leaves MAX_IDR_MASK without any user, remove it and relocate
other MAX_IDR_* constants to lib/idr.c.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Roland Dreier <roland@kernel.org>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: "Marciniszyn, Mike" <mike.marciniszyn@intel.com>
Cc: Jack Morgenstein <jackm@dev.mellanox.co.il>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Wolfram Sang <wolfram@the-dreams.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3b069c5d857a5f1b8cb6bb74c70d9446089f5077 28-Feb-2013 Tejun Heo <tj@kernel.org> IB/core: convert to idr_alloc()

Convert to the much saner new idr interface.

v2: Mike triggered WARN_ON() in idr_preload() because send_mad(),
which may be used from non-process context, was calling
idr_preload() unconditionally. Preload iff @gfp_mask has

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reported-by: "Marciniszyn, Mike" <mike.marciniszyn@intel.com>
Cc: Roland Dreier <roland@kernel.org>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
125c4c706b680c7831f0966ff873c1ad0354ec25 05-Oct-2012 Fengguang Wu <fengguang.wu@intel.com> idr: rename MAX_LEVEL to MAX_IDR_LEVEL

To avoid name conflicts:

drivers/video/riva/fbdev.c:281:9: sparse: preprocessor token MAX_LEVEL redefined

While at it, also make the other names more consistent and add

[akpm@linux-foundation.org: repair fallout]
[sfr@canb.auug.org.au: IB/mlx4: fix for MAX_ID_MASK to MAX_IDR_MASK name change]
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Bernd Petrovitsch <bernd@petrovitsch.priv.at>
Cc: walter harms <wharms@bfs.de>
Cc: Glauber Costa <glommer@parallels.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
87d4abda83a125dec65181a6ecce3035db76d46a 11-Jul-2012 Dotan Barak <dotanb@dev.mellanox.co.il> IB/cm: Destroy idr as part of the module init error flow

Clean the idr as part of the error flow since it is a resource too.

Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2c9ede55ecec58099b72e4bb8eab719f32f72c31 24-Jul-2011 Al Viro <viro@zeniv.linux.org.uk> switch device_get_devnode() and ->devnode() to umode_t *

both callers of device_get_devnode() are only interested in lower 16bits
and nobody tries to return anything wider than 16bit anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
e4dd23d753c3cb0d8533d353069e8b2e8a666360 27-May-2011 Paul Gortmaker <paul.gortmaker@windriver.com> infiniband: Fix up module files that need to include module.h

They had been getting it implicitly via device.h but we can't
rely on that for the future, due to a pending cleanup so fix
it now.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2622e18ef407a8e8e3ddc3d6f0c77b756c493798 31-May-2011 Sean Hefty <sean.hefty@intel.com> IB/cm: Do not automatically disconnect XRC TGT QPs

Because an XRC TGT QP can end up being shared among multiple
processes, don't have the ib_cm automatically send a DREQ when the
userspace process that owns the ib_cm_id exits. Disconnect can be
initiated by the user directly; otherwise, the owner of the XRC INI QP
controls the connection.

Note that as a result of the process exiting, the ib_cm will stop
tracking the XRC connection on the target side. For the purposes of
disconnecting, this isn't a big deal. The ib_cm will respond to the
DREQ appropriately. For other messages, mainly LAP, the CM will
reject the request, since there's no one available to route the
request to.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
ef70044647b260cb6b7863f392384a06670d0b2a 02-Aug-2011 Sean Hefty <sean.hefty@intel.com> IB/cm: Update XRC support based on XRC annex errata

The XRC annex was updated to have XRC behave more like RD. Specifically,
the XRC TGT QPN moves from the local QPN to local EECN field. Lookup of
SRQN is done using the REQ/REP protocol.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
d26a360b776d527429cf13300837711b0b2fde20 13-May-2011 Sean Hefty <sean.hefty@intel.com> IB/cm: Update protocol to support XRC

Update the REQ and REP messages to support XRC connection setup
according to the XRC Annex. Several existing fields must be set to 0 or
1 when connecting XRC QPs, and a reserved field is changed to an
extended transport type.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
b2bc4782191cb574924a1d09f48083ea8b33a93b 04-Jul-2011 Goldwyn Rodrigues <rgoldwyn@suse.de> RDMA: Check for NULL mode in .devnode methods

Commits 71c29bd5c235 ("IB/uverbs: Add devnode method to set path/mode")
and c3af0980ce01 ("IB: Add devnode methods to cm_class and umad_class")
added devnode methods that set the mode.

However, these methods don't check for a NULL mode, and so we get a
crash when unloading modules because devtmpfs_delete_node() calls
device_get_devnode() with mode == NULL.

Add the missing checks.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
[ Also fix cm.c. - Roland ]
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
c3af0980ce01dfb8e946990c3ae4c3727b1e9f26 23-May-2011 Roland Dreier <roland@purestorage.com> IB: Add devnode methods to cm_class and umad_class

We want the ucmX, umadX and issmX device nodes to show up under
/dev/infiniband, and additionally ucmX should have mode 0666. Add
appropriate devnode methods to their class structs for this.

Signed-off-by: Roland Dreier <roland@purestorage.com>
8d8ac86564b616bc17054cbb6e727588da64c86b 04-Mar-2011 Sean Hefty <sean.hefty@intel.com> IB/cm: Cancel pending LAP message when exiting IB_CM_ESTABLISH state

This problem was reported by Moni Shoua <monis@mellanox.com> and Amir
Vadai <amirv@mellanox.com>:

When destroying a cm_id from a context of a work queue and if
the lap_state of this cm_id is IB_CM_LAP_SENT, we need to
release the reference of this id that was taken upon the send
of the LAP message. Otherwise, if the expected APR message
gets lost, it is only after a long time that the reference
will be released, while during that the work handler thread is
not available to process other things.

It turns out that we need to cancel any pending LAP messages whenever
we transition out of the IB_CM_ESTABLISH state. This occurs when
disconnecting - either sending or receiving a DREQ. It can also
happen in a corner case where we receive a REJ message after sending
an RTU, followed by a LAP. Add checks and cancel any outstanding LAP
messages in these three cases.

Canceling the LAP when sending a DREQ fixes the destroy problem
reported by Moni. When a cm_id is destroyed in the IB_CM_ESTABLISHED
state, it sends a DREQ to the remote side to notify the peer that the
connection is going away.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
29963437a48475036353b95ab142bf199adb909e 23-Feb-2011 Sean Hefty <sean.hefty@intel.com> IB/cm: Bump reference count on cm_id before invoking callback

When processing a SIDR REQ, the ib_cm allocates a new cm_id. The
refcount of the cm_id is initialized to 1. However, cm_process_work
will decrement the refcount after invoking all callbacks. The result
is that the cm_id will end up with refcount set to 0 by the end of the
sidr req handler.

If a user tries to destroy the cm_id, the destruction will proceed,
under the incorrect assumption that no other threads are referencing
the cm_id. This can lead to a crash when the cm callback thread tries
to access the cm_id.

This problem was noticed as part of a larger investigation with kernel
crashes in the rdma_cm when running on a real time OS.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
50a025c69ee749d822c301f9bf63dee13c113680 22-Jul-2010 Sean Hefty <sean.hefty@intel.com> IB/cm: Check LAP state before sending an MRA

NULL pointer dereferences in ib_cm_init_qp_attr() were seen by some
users. From a crash dump, I determined that we died in
cm_init_qp_rts_attr() (it's inlined, so it doesn't show up in the
traceback) on the line labeled below:

static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
struct ib_qp_attr *qp_attr,
int *qp_attr_mask)
if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) {
} else {
*qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE;
qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; <-die

The problem is that the rdma_cm can call ib_send_cm_mra() after a
connection has been established. The ib_cm incorrectly assumes that
the MRA is in response to a LAP (load alternate path) message, even
though no LAP message has been received. The ib_cm needs to check the
lap_state before sending an MRA if the cm_id state is established.

Reported-by: Arthur Kepner <akepner@sgi.com>
Reported-by: Josh England <jjengla@gmail.com>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
3e340c05c0def3bb68db6751299b7821c2ba0621 11-Mar-2010 Jani Nikula <ext-jani.1.nikula@nokia.com> IB/cm: Fix device_create() return value check

Use IS_ERR() instead of comparing to NULL.

Signed-off-by: Jani Nikula <ext-jani.1.nikula@nokia.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
5a0e3ad6af8660be21ca98a971cd00f331318c05 24-Mar-2010 Tejun Heo <tj@kernel.org> include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.


The script does the followings.

* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400

2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).

* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
52cf25d0ab7f78eeecc59ac652ed5090f69b619e 19-Jan-2010 Emese Revfy <re.emese@gmail.com> Driver core: Constify struct sysfs_ops in struct kobj_type

Constify struct sysfs_ops.

This is part of the ops structure constification
effort started by Arjan van de Ven et al.

Benefits of this constification:

* prevents modification of data that is shared
(referenced) by many other structure instances
at runtime

* detects/prevents accidental (but not intentional)
modification attempts on archs that enforce
read-only kernel data at runtime

* potentially better optimized code as the compiler
can assume that the const data cannot be changed

* the compiler/linker move const data into .rodata
and therefore exclude them from false sharing

Signed-off-by: Emese Revfy <re.emese@gmail.com>
Acked-by: David Teigland <teigland@redhat.com>
Acked-by: Matt Domsch <Matt_Domsch@dell.com>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Acked-by: Hans J. Koch <hjk@linutronix.de>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
9c3da0991754d480328eeaa2b90cb231a1cea9b6 18-Jan-2009 Harvey Harrison <harvey.harrison@gmail.com> IB: Remove __constant_{endian} uses

The base versions handle constant folding just fine, use them
directly. The replacements are OK in the include/ files as they are
not exported to userspace so we don't need the __ prefixed versions.

This patch does not affect code generation at all.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
01e8ef11bc1a74e65678ed55795f59266d4add01 19-Oct-2008 Parag Warudkar <parag.lkml@gmail.com> x86: sysfs: kill owner field from attribute

Tejun's commit 7b595756ec1f49e0049a9e01a1298d53a7faaa15 made sysfs
attribute->owner unnecessary. But the field was left in the structure to
ease the merge. It's been over a year since that change and it is now
time to start killing attribute->owner along with its users - one arch at
a time!

This patch is attempt #1 to get rid of attribute->owner only for
CONFIG_X86_64 or CONFIG_X86_32 . We will deal with other arches later on
as and when possible - avr32 will be the next since that is something I
can test. Compile (make allyesconfig / make allmodconfig / custom config)
and boot tested.

akpm: the idea is that we put the declaration of sttribute.owner inside
`#ifndef CONFIG_X86'. But that proved to be too ambitious for now because
new usages kept on turning up in subsystem trees.

[akpm: remove the ifdef for now]
Signed-off-by: Parag Warudkar <parag.lkml@gmail.com>
Cc: Greg KH <greg@kroah.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Tejun Heo <htejun@gmail.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
91bd418fdc8526ee70a0e8f7970b584c8870ae10 22-Jul-2008 Greg Kroah-Hartman <gregkh@suse.de> device create: infiniband: convert device_create_drvdata to device_create

Now that device_create() has been audited, rename things back to the
original call to be sane.

Cc: Roland Dreier <rolandd@cisco.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
a7e80ce26caa174b1caa5fdfbb3dbd740a87d33a 30-Sep-2008 Hefty, Sean <sean.hefty@intel.com> IB/cm: Correctly free cm_device structure

commit 110cf374 ("infiniband: make cm_device use a struct device and
not a kobject.") introduced a memory leak, since it deleted
cm_release_dev_obj(), which was where cm_dev was freed. Fix this by
freeing the leaked structure after calling device_unregister().

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
110cf374a809817d5c080c0ac82d65d029820a66 27-May-2008 Greg Kroah-Hartman <gregkh@suse.de> infiniband: make cm_device use a struct device and not a kobject.

This object really should be a struct device, or at least contain a
pointer to a struct device, as it is trying to create a separate device
tree outside of the main device tree. This patch fixes this problem.

It is needed for the class core rework that is being done in the driver

Cc: 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
d4c4196f24ade5f336882587480652efde2c739c 27-May-2008 Greg Kroah-Hartman <gregkh@suse.de> infiniband: rename "device" to "ib_device" in cm_device

This pointer really is a struct ib_device, not a struct device, so name
it properly to help prevent confusion.

This makes the followon patch in this series much smaller and easier to
understand as well.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
f3781d2e89f12dd5afa046dc56032af6e39bd116 15-Jul-2008 Roland Dreier <rolandd@cisco.com> RDMA: Remove subversion $Id tags

They don't get updated by git and so they're worse than useless.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
a88f488857cd2e54789791d2b5e8d116721d5cb7 17-Apr-2008 Roland Dreier <rolandd@cisco.com> IB/cm: Endianness annotations

Mostly update the RB tree comparisons to force __be types to normal
integers, but the change to cm_format_sidr_req() is a real fix:
param->path->pkey is already __be16.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
1b90c137cc2a0e9b813a8ae316827c493c664146 29-Mar-2008 Al Viro <viro@ftp.linux.org.uk> trivial endianness annotations: infiniband core

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
84ba284cd78c130818e2de53150f39b92504593b 22-Feb-2008 Sean Hefty <sean.hefty@intel.com> IB/cm: Flush workqueue when removing device

When a CM MAD is received, it is queued to a CM workqueue for
processing. The queued work item references the port and device on
which the MAD was received. If that device is removed from the system
before the work item can execute, the work item will reference freed

To fix this, flush the workqueue after unregistering to receive MAD,
and before the device is be freed.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
7c7a9bccd2ba9f17e4b588461f140578a0a7b073 12-Feb-2008 Roland Dreier <rolandd@cisco.com> IB/cm: Fix infiniband_cm class kobject ref counting

Commit 9af57b7a ("IB/cm: Add basic performance counters") introduced a
bug in how the reference count for cm_class.subsys.kobj was handled:
the path that released a device did a kobject_put() on that kobject, but
there was no kobject_get() in the path the handles adding a device. So
the reference count ended up too low, which leads to bad things. Fix up
and simplify the reference counting to avoid this.

(Actually, I introduced the bug when fixing the patch up to match some
of Greg's kobject changes, but who's counting)

Signed-off-by: Roland Dreier <rolandd@cisco.com>
ab64b960673250518e748f8b4f1545447136b68b 12-Feb-2008 Roland Dreier <rolandd@cisco.com> IB/cm: Remove debug printk()s that snuck upstream

Pesky little devils, sneaking around...

Signed-off-by: Roland Dreier <rolandd@cisco.com>
3971c9f6dbf26f077b929dbe14ced60a697ebcf0 11-Dec-2007 Sean Hefty <sean.hefty@intel.com> IB/cm: Add interim support for routed paths

Paths with hop_limit > 1 indicate that the connection will be routed
between IB subnets. Update the subnet local field in the CM REQ based
on the hop_limit value. In addition, if the path is routed, then set
the LIDs in the REQ to the permissive LIDs. This is used to indicate
to the passive side that it should use the LIDs in the received local
route header (LRH) associated with the REQ when programming the QP.

This is a temporary work-around to the IB CM to support IB router
development until the IB router specification is completed. It is not
anticipated that this work-around will cause any interoperability
issues with existing stacks or future stacks that will properly
support IB routers when defined.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
9af57b7a2702f2cdf6ae499612e90b0f84bcb393 17-Jul-2007 Sean Hefty <sean.hefty@intel.com> IB/cm: Add basic performance counters

Add performance/debug counters to track sent/received messages, retries,
and duplicates. Counters are tracked per CM message type, per port.

The counters are always enabled, so intrusive state tracking is not done.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
de98b693e9857e183679cd2f49b3c30d2bc57629 01-Aug-2007 Sean Hefty <sean.hefty@intel.com> IB/cm: Modify interface to send MRAs in response to duplicate messages

The IB CM provides a message received acknowledged (MRA) message that
can be sent to indicate that a REQ or REP message has been received, but
will require more time to process than the timeout specified by those
messages. In many cases, the application may not know how long it will
take to respond to a CM message, but the majority of the time, it will
usually respond before a retry has been sent. Rather than sending an
MRA in response to all messages just to handle the case where a longer
timeout is needed, it is more efficient to queue the MRA for sending in
case a duplicate message is received.

This avoids sending an MRA when it is not needed, but limits the number
of times that a REQ or REP will be resent. It also provides for a
simpler implementation than generating the MRA based on a timer event.
(That is, trying to send the MRA after receiving the first REQ or REP if
a response has not been generated, so that it is received at the remote
side before a duplicate REQ or REP has been received)

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
454a01e7f486279b0bf8979d94203ab7a503e053 18-Jul-2007 Roland Dreier <rolandd@cisco.com> IB/cm: Make internal function cm_get_ack_delay() static

Signed-off-by: Roland Dreier <rolandd@cisco.com>
6164c8cd1333403a28202f7c7e64ff9086d8f1aa 03-Jul-2007 Sean Hefty <sean.hefty@intel.com> IB/cm: Send no match if a SIDR REQ does not match a listen

If a SIDR REQ does not match a listen, we should reply with status
value 1 (service ID not supported), rather than dropping through to
the default case of status 2 (rejected by service provider).

Doing this also fixes a bug where the cm_id_priv is removed from the
remote_sidr_table twice.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
29c2731cbfa9d5b560a73461775f2be03b46dd4c 02-Jul-2007 Sean Hefty <sean.hefty@intel.com> IB/cm: Fix handling of duplicate SIDR REQs

Fix handling to duplicate SIDR REQs to avoid sending a reject if a
duplicate is detected. Duplicates should just be silently discarded.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
1d84612649427a85e1f311baa7215f9a6252d856 18-Jun-2007 Sean Hefty <sean.hefty@intel.com> IB/cm: Include HCA ACK delay in local ACK timeout

The IB CM should include the HCA ACK delay when calculating the local
ACK timeout value to use for RC QPs. If the HCA ACK delay is large
enough relative to the packet life time, then if it is not taken into
account, the calculated timeout value ends up being too small, which
can result in "retry exceeded" errors.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
24be6e81c78314c91a47200272eb4bc31284bd7b 18-Jun-2007 Sean Hefty <sean.hefty@intel.com> IB/cm: Use spin_lock_irq() instead of spin_lock_irqsave() when possible

The ib_cm is a little over zealous about using spin_lock_irqsave,
when spin_lock_irq would do.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
d998ccce020e2cfcf11c6b57503532930ede2894 22-May-2007 Sean Hefty <sean.hefty@intel.com> IB/cm: Fix stale connection detection

The ib_cm can incorrectly detect a stale connection (a new connection
request for a QPN that is already connected) as a duplicate connection
request. Separate the handling of potential duplicate REQs from stale

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
9f81036c54ed1f860d2807c5a6aa4f2b30c21204 21-May-2007 Michael S. Tsirkin <mst@dev.mellanox.co.il> IB/cm: Improve local id allocation

The IB CM uses an idr for local id allocations, with a running counter
as start_id. This fails to generate distinct ids if

1. An id is constantly created and destroyed
2. A chunk of ids just beyond the current next_id value is occupied

This in turn leads to an increased chance of connection request being
mis-detected as a duplicate, sometimes for several retries, until
next_id gets past the block of allocated ids. This has been observed
in practice.

As a fix, remember the last id allocated and start immediately above it.
This also fixes a problem with the old code, where next_id might
overflow and become negative.

Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
6473d160b4aba8023bcf38519a5989694dfd51a7 06-Mar-2007 Jean Delvare <khali@linux-fr.org> PCI: Cleanup the includes of <linux/pci.h>

I noticed that many source files include <linux/pci.h> while they do
not appear to need it. Here is an attempt to clean it all up.

In order to find all possibly affected files, I searched for all
files including <linux/pci.h> but without any other occurence of "pci"
or "PCI". I removed the include statement from all of these, then I
compiled an allmodconfig kernel on both i386 and x86_64 and fixed the
false positives manually.

My tests covered 66% of the affected files, so there could be false
positives remaining. Untested files are:


I would welcome test reports for these files. I am fine with removing
the untested files from the patch if the general opinion is that these
changes aren't safe. The tested part would still be nice to have.

Note that this patch depends on another header fixup patch I submitted
to LKML yesterday:
[PATCH] scatterlist.h needs types.h

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
e971b8cd19d39366b9fdc9eadafec988d785264d 22-Feb-2007 Sean Hefty <sean.hefty@intel.com> IB/cm: Remove ca_guid from cm_device structure

The cm_device references an ib_device, which already contains the node_guid.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
0fe313b000b6a699afbbb59ef9c47a2b22146f1e 01-Dec-2006 Sean Hefty <sean.hefty@intel.com> RDMA/cma: Allow early transition to RTS to handle lost CM messages

During connection establishment, the passive side of a connection can
receive messages from the active side before the connection event has
been delivered to the user. Allow the passive side to send messages
in response to received data before the event is delivered. To handle
the case where the connection messages are lost, a new rdma_notify()
function is added that users may invoke to force a connection into the
established state.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
e1444b5a163e81138754cab27c4fa1637b5a2239 28-Nov-2006 Sean Hefty <sean.hefty@intel.com> IB/cm: Fix automatic path migration support

The ib_cm_establish() function is replaced with a more generic
ib_cm_notify(). This routine is used to notify the CM that failover
has occurred, so that future CM messages (LAP, DREQ) reach the remote
CM. (Currently, we continue to use the original path) This bumps the
userspace CM ABI.

New alternate path information is captured when a LAP message is sent
or received. This allows QP attributes to be initialized for the user
when a new path is loaded after failover occurs.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
e31353eaeca736981ec13b46089d30147342b28b 24-Oct-2006 Dotan Barak <dotanb@mellanox.co.il> RDMA/cm: Remove setting local write as part of QP access flags

The qp_access_flags are for remote access permissions only, so
IB_ACCESS_LOCAL_WRITE is an invalid value. Remove it from the values
set by cm_init_qp_init_attr() and cma_init_ib_qp().

Signed-off-by: Dotan Barak <dotanb@mellanox.co.il>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
bed8bdfddd851657cf9e5fd16bb44abb02ae7f42 23-Oct-2006 Eric Sesterhenn <snakebyte@gmx.de> IB: kmemdup() cleanup

Replace open coded kmemdup() to save some screen space, and allow
inlining/not inlining to be triggered by gcc.

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
c4028958b6ecad064b1a6303a6a5906d4fe48d73 22-Nov-2006 David Howells <dhowells@redhat.com> WorkStruct: make allyesconfig

Fix up for make allyesconfig.

Signed-Off-By: David Howells <dhowells@redhat.com>
82a9c16a10521a0ceadbd27a549f6e8d5e70e0ab 04-Oct-2006 Sean Hefty <sean.hefty@intel.com> IB/cm: Send DREP in response to unmatched DREQ

Currently a DREP is only sent in response to a DREQ if a connection
has been found matching the DREQ, and it is in the proper state. Once
a DREP is sent, the local connection moves into timewait. Duplicate
DREQs received while in this state result in re-sending the DREP.

However, it's likely that the local connection will enter and exit
timewait before the remote side times out a lost DREP and resends a DREQ.
To handle this, we send a DREP in response to a DREQ, even if a local
connection is not found. This avoids maintaining disconnected
id's in timewait states for excessively long times, just to handle a
lost DREP.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
8575329d4f8596519d86830f622d2c30601f3ef3 04-Oct-2006 Sean Hefty <sean.hefty@intel.com> IB/cm: Fix timewait crash after module unload

If the ib_cm module is unloaded while id's are still in timewait, the
CM will destroy the work queue used to process timewait. Once the
id's exit timewait, their timers will fire, leading to a crash trying
to access the destroyed work queue.

We need to track id's that are in timewait, and cancel their deferred
work on module unload.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
a70d059009f4a207e2a9c794f40fc8c870096d54 28-Aug-2006 Michael S. Tsirkin <mst@mellanox.co.il> IB/cm: Do not track remote QPN in timewait state

Do not track remote QPN in TimeWait state, since QP is not connected.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
07ebafbaaa72aa6a35472879008f5a1d1d469a0c 03-Aug-2006 Tom Tucker <tom@opengridcomputing.com> RDMA: iWARP Core Changes.

Modifications to the existing rdma header files, core files, drivers,
and ulp files to support iWARP, including:
- Hook iWARP CM into the build system and use it in rdma_cm.
- Convert enum ib_node_type to enum rdma_node_type, which includes
the possibility of RDMA_NODE_RNIC, and update everything for this.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
3cd965646b7cb75ae84dd0daf6258adf20e4f169 23-Sep-2006 Roland Dreier <rolandd@cisco.com> IB: Whitespace fixes

Remove some trailing whitespace that has snuck in despite the best
efforts of whitespace=error-all. Also fix a few other whitespace

Signed-off-by: Roland Dreier <rolandd@cisco.com>
f06d26537559113207e4b73af6a22eaa5c5e9dc3 29-Aug-2006 Sean Hefty <sean.hefty@intel.com> IB/cm: Randomize starting comm ID

Randomize the starting local comm ID to avoid getting a rejected
connection due to a stale connection after a system reboot or
reloading of the ib_cm.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
76842405fca5f8b8e08d91558ecd3b922265034a 28-Aug-2006 Sean Hefty <sean.hefty@intel.com> IB/cm: Use correct reject code for invalid GID

Set the reject code properly when rejecting a request that contains an
invalid GID. A suitable GID is returned by the IB CM in the
additional reject information (ARI). This is a spec compliancy issue.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
c1f250c0b45cdfdd89b21f2b866f317439aa21de 28-Aug-2006 Sean Hefty <sean.hefty@intel.com> IB/cm: Enable atomics along with RDMA reads

Enable atomic operations along with RDMA reads if a local RDMA
read/atomic depth is provided by the user.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
75df23e229acab85b704f4603bdf5efdc7960e6a 25-Jul-2006 Sean Hefty <sean.hefty@intel.com> IB/cm: Fix error handling in ib_send_cm_req

Report error code rather than success (0) on failure allocating
timewait_info in ib_send_cm_req().

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
04c335430f6d9f9088c852bc05a3a0c8baa921c4 14-Jul-2006 Michael S. Tsirkin <mst@mellanox.co.il> [PATCH] IB/cm: drop REQ when out of memory

If a user of the IB CM returns -ENOMEM from their connection callback, simply
drop the incoming REQ - do not attempt to send a reject. This should allow
the sender to retry the request.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
0d8fdfd71bc871ffc07fe4429db8d4934185a8ec 30-Jun-2006 Sean Hefty <sean.hefty@intel.com> IB/core: Set alternate port number when initializing QP attributes

Set alternate port number when initializing QP attributes. This bug
is OpenFabrics bugzilla bug #160.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
ca222c6b2c48e1e0be330a55611ba394251330cb 18-Jun-2006 Sean Hefty <sean.hefty@intel.com> IB/cm: Use address handle helpers

Use new ib_init_ah_from_wc() and ib_init_ah_from_path() helper
functions to clean up the IB CM.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
75af9088514432ef0c1052ba3767ceb0beb6f101 18-Jun-2006 Sean Hefty <sean.hefty@intel.com> IB/ucm: Get rid of duplicate P_Key parameter

The P_Key is provided into a SIDR REQ in two places, once as a
parameter, and again in the path record. Remove the P_Key as a
parameter and always use the one given in the path record.

This change has no practical effect on ABI functionality.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
856c256f883f027a14b546164294b4a86fea81a4 25-May-2006 Michael S. Tsirkin <mst@mellanox.co.il> IB/cm: remove unneeded flush_workqueue

destroy_workqueue() already does flush_workqueue().

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
6e61d04f2d8c7ac4f67e1f498ed2a2a3ad8edaa3 18-Jun-2006 Sean Hefty <sean.hefty@intel.com> IB/cm: Match connection requests based on private data

Extend matching connection requests to listens in the InfiniBand CM to
include private data checks.

This allows applications to listen on the same service identifier,
with private data directing the request to the appropriate application.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
1b52fa98edd1c3e663ea4a06519e3d20976084a8 12-May-2006 Sean Hefty <mshefty@ichips.intel.com> IB: refcount race fixes

Fix race condition during destruction calls to avoid possibility of
accessing object after it has been freed. Instead of waking up a wait
queue directly, which is susceptible to a race where the object is
freed between the reference count going to 0 and the wake_up(), use a
completion to wait in the function doing the freeing.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
87fd1a11ae91ab42fac978467667c61fee9f01da 03-Mar-2006 Sean Hefty <sean.hefty@intel.com> IB/cm: Check cm_id state before handling a REP

Move checking the state of a cm_id before modifying it when handling a
REP. This fixes a bug seen under MPI scale-up testing, where a NULL
timewait_info pointer is dereferenced if a request times out before a
REP is received.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
858119e159384308a5dde67776691a2ebf70df0f 14-Jan-2006 Arjan van de Ven <arjan@infradead.org> [PATCH] Unlinline a bunch of other functions

Remove the "inline" keyword from a bunch of big functions in the kernel with
the goal of shrinking it by 30kb to 40kb

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
cf311cd49a78f1e431787068cc31d29d06a415e6 10-Jan-2006 Sean Hefty <sean.hefty@intel.com> IB: Add node_guid to struct ib_device

Add a node_guid field to struct ib_device. It is the responsibility
of the low-level driver to initialize this field before registering a
device with the midlayer. Convert everyone to looking at this field
instead of calling ib_query_device() when all they want is the node
GUID, and remove the node_guid field from struct ib_device_attr.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
de1bb1a64c29bae4f5330c70bd1dc6a62954c9f4 30-Nov-2005 Sean Hefty <sean.hefty@intel.com> IB/cm: avoid reusing local ID

Use an increasing local ID to avoid re-using identifiers while
messages may still be outstanding on the old ID. Without this, a
quick connect-disconnect-connect sequence can fail by matching
messages for the new connection with the old connection.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
227eca83690da7dcbd698d3268e29402e0571723 30-Nov-2005 Sean Hefty <sean.hefty@intel.com> IB/cm: correct reported reject code

Change reject code from TIMEOUT to CONSUMER_REJECT when destroying a
cm_id in the process of connecting.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
de6eb66b56d9df5ce6bd254994f05e065214e8cd 02-Nov-2005 Roland Dreier <rolandd@cisco.com> [IB] kzalloc() conversions

Replace kmalloc()+memset(,0,) with kzalloc(), for a net savings of 35
source lines and about 500 bytes of text.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
34816ad98efe4d47ffd858a0345321f9d85d9420 25-Oct-2005 Sean Hefty <sean.hefty@intel.com> [IB] Fix MAD layer DMA mappings to avoid touching data buffer once mapped

The MAD layer was violating the DMA API by touching data buffers used
for sends after the DMA mapping was done. This causes problems on
non-cache-coherent architectures, because the device doing DMA won't
see updates to the payload buffers that exist only in the CPU cache.

Fix this by having all MAD consumers use ib_create_send_mad() to
allocate their send buffers, and moving the DMA mapping into the MAD
layer so it can be done just before calling send (and after any
modifications of the send buffer by the MAD layer).

Tested on a non-cache-coherent PowerPC 440SPe system.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
ae7971a7706384ca373fb7e212fe195698e6c5a1 24-Oct-2005 Sean Hefty <sean.hefty@intel.com> [IB] CM: Fix initialization of QP attributes for UC QPs.

Fix cm_init_qp_init_attr(), cm_init_qp_rtr_attr() and cm_init_qp_rts_attr()
so that they correctly handle the differences between UC and RC QPs. This
fixes problems with setting up UC QPs through the CM.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
5d7edb3c1a01310725d86f0d83fb3be45685dc82 24-Oct-2005 Roland Dreier <rolandd@cisco.com> [IB] Add idr_destroy() calls on module unload

Add idr_destroy() calls to the module_exit() functions of the four IB
driver modules that use idrs, so we don't leak idr_layer_cache objects
when these modules are unloaded.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
07d357d0cbf89d9980b1769d5444a3c70f000e00 18-Oct-2005 Sean Hefty <sean.hefty@intel.com> [IB] CM: bind IDs to a specific device

Bind communication identifiers to a device to support device removal.
Export per HCA CM devices to userspace.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
1b205c2d2464bfecbba80227e74b412596dc5521 10-Sep-2005 Roland Dreier <roland@eddore.topspincom.com> [PATCH] IB: fix CM use-after-free

If the CM REQ handling function gets to error2, then it frees
cm_id_priv->timewait_info. But the next line goes through
ib_destroy_cm_id() -> ib_send_cm_rej() -> cm_reset_to_idle(),
which ends up calling cm_cleanup_timewait(), which dereferences the
pointer we just freed. Make sure we clear cm_id_priv->timewait_info
after freeing it, so that doesn't happen.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
354ba39cf96e439149541acf3c6c7c0df0a3ef25 10-Sep-2005 John Kingman <kingman@storagegear.com> [PATCH] IB CM: support CM redir

Changes to CM to support CM and port redirection (REJ reason 24).

Signed-off-by: John Kingman <kingman <at> storagegear.com>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
a4d61e84804f3b14cc35c5e2af768a07c0f64ef6 25-Aug-2005 Roland Dreier <roland@eddore.topspincom.com> [PATCH] IB: move include files to include/rdma

Move the InfiniBand headers from drivers/infiniband/include to include/rdma.
This allows InfiniBand-using code to live elsewhere, and lets us remove the
ugly EXTRA_CFLAGS include path from the InfiniBand Makefiles.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
97f52eb438be7caebe026421545619d8a0c1398a 14-Aug-2005 Sean Hefty <sean.hefty@intel.com> [PATCH] IB: sparse endianness cleanup

Fix sparse warnings. Use __be* where appropriate.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
a977049dacdef6a9e69fb4872b42a68e93a69956 27-Jul-2005 Hal Rosenstock <halr@voltaire.com> [PATCH] IB: Add the kernel CM implementation

Add the kernel CM implementation

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Hal Rosenstock <halr@voltaire.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>