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  1. 26 1月, 2008 7 次提交
    • P
      IPoIB/cm: Add connected mode support for devices without SRQs · 68e995a2
      由 Pradeep Satyanarayana 提交于 
      Some IB adapters (notably IBM's eHCA) do not implement SRQs (shared
receive queues).  The current IPoIB connected mode support only works
on devices that support SRQs.

Fix this by adding support for using the receive queue of each
connected mode receive QP.  The disadvantage of this compared to using
an SRQ is that it means a full queue of receives must be posted for
each remote connected mode peer, which means that total memory usage
is potentially much higher than when using SRQs.  To manage this, add
a new module parameter "max_nonsrq_conn_qp" that limits the number of
connections allowed per interface.

The rest of the changes are fairly straightforward: we use a table of
struct ipoib_cm_rx to hold all the active connections, and put the
table index of the connection in the high bits of receive WR IDs.
This is needed because we cannot rely on the struct ib_wc.qp field for
non-SRQ receive completions.  Most of the rest of the changes just
test whether or not an SRQ is available, and post receives or find
received packets in the right place depending on the answer.

Cleaning up dead connections actually becomes simpler, because we do
not have to do the "last WQE reached" dance that is required to
destroy QPs attached to an SRQ.  We just move the QP to the error
state and wait for all pending receives to be flushed.
Signed-off-by: NPradeep Satyanarayana <pradeeps@linux.vnet.ibm.com>

[ Completely rewritten and split up, based on Pradeep's work.  Several
  bugs fixed and no doubt several bugs introduced.  - Roland ]
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      68e995a2
    • R
      IPoIB/cm: Factor out ipoib_cm_free_rx_reap_list() · efcd9971
      由 Roland Dreier 提交于 
      Factor out the code for going through the rx_reap list of struct
ipoib_cm_rx and freeing each one.  This consolidates the code
duplicated between ipoib_cm_dev_stop() and ipoib_cm_rx_reap() and
reduces the risk of error when adding additional accounting.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      efcd9971
    • R
      IPoIB/cm: Factor out ipoib_cm_create_srq() · 7b3687df
      由 Roland Dreier 提交于 
      Factor out the code to create an SRQ and allocate the receive ring in
ipoib_cm_dev_init() into a new function ipoib_cm_create_srq().  This
will make the code neater when support for devices that don't implement
SRQs is added.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      7b3687df
    • R
      IPoIB/cm: Factor out ipoib_cm_free_rx_ring() · 1efb6144
      由 Roland Dreier 提交于 
      Factor out the code to unmap/free skbs and free the receive ring in
ipoib_cm_dev_cleanup() into a new function ipoib_cm_free_rx_ring().
This function will be called from a couple of other places when
support for devices that don't implement SRQs is added.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      1efb6144
    • R
      IPoIB: Trivial formatting cleanups · 2337f809
      由 Roland Dreier 提交于 
      Fix whitespace blunders, convert "foo* bar" to "foo *bar", etc.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      2337f809
    • R
      IB/ipath: Fix crash on unload introduced by sysfs changes · 657c2f2c
      由 Roland Dreier 提交于 
      Commit 23b9c1ab ("Infiniband: make ipath driver use default driver
groups.") introduced a bug in the ipath driver where
ipath_device_create_group() fell through into the error path, even on
success, which meant that the sysfs groups it created would always get
removed right away.  This made ipath_device_remove_group() hit the
BUG_ON() in sysfs_remove_group() when it tried to remove those groups a
second time.

Correct the return path so that the groups stick around until they are
supposed to be cleaned up.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      657c2f2c
    • K
      fix oops on rmmod capidrv · eb36f4fc
      由 Karsten Keil 提交于 
      Fix overwriting the stack with the version string
(it is currently 10 bytes + zero) when unloading the
capidrv module. Safeguard against overwriting it
should the version string grow in the future.

Should fix Kernel Bug Tracker Bug 9696.
Signed-off-by: NGerd v. Egidy <gerd.von.egidy@intra2net.com>
Acked-by: NKarsten Keil <kkeil@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      eb36f4fc
  3. 25 1月, 2008 33 次提交