diff options
| author | Kaike Wan <kaike.wan@intel.com> | 2019-03-18 09:58:30 -0700 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-04-03 15:27:30 -0300 |
| commit | f6f3f532556e4fcaa2d259fd04a800bfb4f9670d (patch) | |
| tree | 6ee8e59d3dcac951660fb12a8aeeb9d90395d7de /drivers/infiniband/hw/hfi1/rc.h | |
| parent | 1abe186ed8a6593069bc122da55fc684383fdc1c (diff) | |
IB/hfi1: Delay the release of destination mr for TID RDMA WRITE DATA
The reference of destination memory region is first obtained when TID RDMA
WRITE request is first received on the responder side. This reference is
released once all TID RDMA WRITE RESP packets are sent to the requester
side, even though not all TID RDMA WRITE DATA packets may have been
received. This early release will especially be undesired if the software
needs to access the destination memory before the last data packet is
received.
This patch delays the release of the MR until all TID RDMA DATA packets
have been received. A helper function to release the reference is also
created to simplify the code.
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/rc.h')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/rc.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/rc.h b/drivers/infiniband/hw/hfi1/rc.h index 8e0935b9bf2a..5ed5e85d5841 100644 --- a/drivers/infiniband/hw/hfi1/rc.h +++ b/drivers/infiniband/hw/hfi1/rc.h @@ -41,6 +41,14 @@ static inline u32 restart_sge(struct rvt_sge_state *ss, struct rvt_swqe *wqe, return rvt_restart_sge(ss, wqe, len); } +static inline void release_rdma_sge_mr(struct rvt_ack_entry *e) +{ + if (e->rdma_sge.mr) { + rvt_put_mr(e->rdma_sge.mr); + e->rdma_sge.mr = NULL; + } +} + struct rvt_ack_entry *find_prev_entry(struct rvt_qp *qp, u32 psn, u8 *prev, u8 *prev_ack, bool *scheduled); int do_rc_ack(struct rvt_qp *qp, u32 aeth, u32 psn, int opcode, u64 val, |