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  1. 23 9月, 2006 1 次提交
  3. 25 7月, 2006 1 次提交
  5. 27 6月, 2006 1 次提交
  7. 18 6月, 2006 2 次提交
  9. 13 5月, 2006 1 次提交
    • S
      IB: refcount race fixes · 1b52fa98
      由 Sean Hefty 提交于 
      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: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      1b52fa98
  11. 20 4月, 2006 1 次提交
  13. 03 4月, 2006 1 次提交
    • M
      IB/mad: fix oops in cancel_mads · 37289efe
      由 Michael S. Tsirkin 提交于 
      We have seen the following OOPs in cancel_mads, when restarting opensm
multiple times:

    Call Trace:
      [<c010549b>] show_stack+0x9b/0xb0
      [<c01055ec>] show_registers+0x11c/0x190
      [<c01057cd>] die+0xed/0x160
      [<c031b966>] do_page_fault+0x3f6/0x5d0
      [<c010511f>] error_code+0x4f/0x60
      [<f8ac4e38>] cancel_mads+0x128/0x150 [ib_mad]
      [<f8ac2811>] unregister_mad_agent+0x11/0x130 [ib_mad]
      [<f8ac2a12>] ib_unregister_mad_agent+0x12/0x20 [ib_mad]
      [<f8b10f23>] ib_umad_close+0xf3/0x130 [ib_umad]
      [<c0162937>] __fput+0x187/0x1c0
      [<c01627a9>] fput+0x19/0x20
      [<c0160f7a>] filp_close+0x3a/0x60
      [<c0121ca8>] put_files_struct+0x68/0xa0
      [<c0103cf7>] do_signal+0x47/0x100
      [<c0103ded>] do_notify_resume+0x3d/0x40
      [<c0103f9e>] work_notifysig+0x13/0x25

We traced this back to local_completions unlocking mad_agent_priv->lock
while still keeping a pointer into local_list. A later call to
list_del(&local->completion_list) would then corrupt the list.

To fix this, remove the entry from local_list after looking it up but
before releasing mad_agent_priv->lock, to prevent cancel_mads from
finding and freeing it.
Signed-off-by: NJack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: NMichael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      37289efe
  15. 30 3月, 2006 2 次提交
  17. 21 3月, 2006 3 次提交
    • M
      IB/mad: Fix oopsable race on device removal · dc05980d
      由 Michael S. Tsirkin 提交于 
      Fix an oopsable race debugged by Eli Cohen <eli@mellanox.co.il>:
After removing the port from port_list, ib_mad_port_close flushes
port_priv->wq before destroying the special QPs. This means that a
completion event could arrive, and queue a new work in this work queue
after flush.

This patch also removes an unnecessary flush_workqueue():
destroy_workqueue() already includes a flush.
Signed-off-by: NMichael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      dc05980d
    • J
      IB/umad: Add support for large RMPP transfers · f36e1793
      由 Jack Morgenstein 提交于 
      Add support for sending and receiving large RMPP transfers.  The old
code supports transfers only as large as a single contiguous kernel
memory allocation.  This patch uses linked list of memory buffers when
sending and receiving data to avoid needing contiguous pages for
larger transfers.

  Receive side: copy the arriving MADs in chunks instead of coalescing
  to one large buffer in kernel space.

  Send side: split a multipacket MAD buffer to a list of segments,
  (multipacket_list) and send these using a gather list of size 2.
  Also, save pointer to last sent segment, and retrieve requested
  segments by walking list starting at last sent segment. Finally,
  save pointer to last-acked segment.  When retrying, retrieve
  segments for resending relative to this pointer.  When updating last
  ack, start at this pointer.
Signed-off-by: NJack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      f36e1793
    • R
      IB/mad: Simplify SMI by eliminating smi_check_local_dr_smp() · 5e9f71a1
      由 Ralph Campbell 提交于 
      The call to ib_get_agent_port() shouldn't be possible to fail when
smi_check_local_dr_smp() is called from ib_mad_recv_done_handler().
When it is called from handle_outgoing_dr_smp(), the device and
port_num come from mad_agent_priv so I assume the call to
ib_get_agent_port() shouldn't fail either.  In either case,
smi_check_local_smp() only uses the mad_agent pointer to check that
mad_agent->device->process_mad is not NULL.  The device pointer would
have to be the same as the one passed to smi_check_local_dr_smp()
since that pointer is used later instead of the one checked in
smi_check_local_smp().
Signed-off-by: NHal Rosenstock <halr@voltaire.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      5e9f71a1
  19. 04 2月, 2006 1 次提交
  21. 28 11月, 2005 1 次提交
  23. 07 11月, 2005 1 次提交
  25. 02 11月, 2005 1 次提交
  27. 26 10月, 2005 1 次提交
    • S
      [IB] Fix MAD layer DMA mappings to avoid touching data buffer once mapped · 34816ad9
      由 Sean Hefty 提交于 
      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: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
      34816ad9
  29. 18 10月, 2005 1 次提交
  31. 09 10月, 2005 1 次提交
  33. 27 8月, 2005 2 次提交
  35. 28 7月, 2005 16 次提交
  37. 17 4月, 2005 2 次提交