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| 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/agent.h | |
| parent | ae7971a7706384ca373fb7e212fe195698e6c5a1 (diff) | |
| download | talos-op-linux-34816ad98efe4d47ffd858a0345321f9d85d9420.tar.gz talos-op-linux-34816ad98efe4d47ffd858a0345321f9d85d9420.zip | |
[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/agent.h')
| -rw-r--r-- | drivers/infiniband/core/agent.h | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/infiniband/core/agent.h b/drivers/infiniband/core/agent.h index d9426842254a..c5f3cfec942a 100644 --- a/drivers/infiniband/core/agent.h +++ b/drivers/infiniband/core/agent.h @@ -39,17 +39,14 @@ #ifndef __AGENT_H_ #define __AGENT_H_ -extern spinlock_t ib_agent_port_list_lock; +#include <rdma/ib_mad.h> -extern int ib_agent_port_open(struct ib_device *device, - int port_num); +extern int ib_agent_port_open(struct ib_device *device, int port_num); extern int ib_agent_port_close(struct ib_device *device, int port_num); -extern int agent_send(struct ib_mad_private *mad, - struct ib_grh *grh, - struct ib_wc *wc, - struct ib_device *device, - int port_num); +extern int agent_send_response(struct ib_mad *mad, struct ib_grh *grh, + struct ib_wc *wc, struct ib_device *device, + int port_num, int qpn); #endif /* __AGENT_H_ */ |
