diff options
| author | Sean Hefty <sean.hefty@intel.com> | 2005-10-25 10:51:39 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2005-10-25 10:51:39 -0700 |
| commit | 34816ad98efe4d47ffd858a0345321f9d85d9420 (patch) | |
| tree | 8a5ed6a9b80e667c4c02d9993711ced06d158555 /drivers/infiniband/core/mad_priv.h | |
| parent | ae7971a7706384ca373fb7e212fe195698e6c5a1 (diff) | |
[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>
Diffstat (limited to 'drivers/infiniband/core/mad_priv.h')
| -rw-r--r-- | drivers/infiniband/core/mad_priv.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/infiniband/core/mad_priv.h b/drivers/infiniband/core/mad_priv.h index f1ba794e0da..570f78682af 100644 --- a/drivers/infiniband/core/mad_priv.h +++ b/drivers/infiniband/core/mad_priv.h @@ -118,9 +118,10 @@ struct ib_mad_send_wr_private { struct ib_mad_list_head mad_list; struct list_head agent_list; struct ib_mad_agent_private *mad_agent_priv; + struct ib_mad_send_buf send_buf; + DECLARE_PCI_UNMAP_ADDR(mapping) struct ib_send_wr send_wr; struct ib_sge sg_list[IB_MAD_SEND_REQ_MAX_SG]; - u64 wr_id; /* client WR ID */ __be64 tid; unsigned long timeout; int retries; @@ -141,10 +142,7 @@ struct ib_mad_local_private { struct list_head completion_list; struct ib_mad_private *mad_priv; struct ib_mad_agent_private *recv_mad_agent; - struct ib_send_wr send_wr; - struct ib_sge sg_list[IB_MAD_SEND_REQ_MAX_SG]; - u64 wr_id; /* client WR ID */ - __be64 tid; + struct ib_mad_send_wr_private *mad_send_wr; }; struct ib_mad_mgmt_method_table { |