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| author | Kaike Wan <kaike.wan@intel.com> | 2019-01-24 06:36:48 -0800 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2019-02-05 17:53:55 -0500 |
| commit | a0b34f75ec209e40f06912380533ec525691544f (patch) | |
| tree | fc11bed576ed43e217c7719d88623d311d825aa4 /drivers/infiniband/hw/hfi1/verbs.h | |
| parent | 24b11923da4c7dbf5690d3ac74710affaf564196 (diff) | |
| download | linux-a0b34f75ec209e40f06912380533ec525691544f.tar.gz linux-a0b34f75ec209e40f06912380533ec525691544f.tar.bz2 linux-a0b34f75ec209e40f06912380533ec525691544f.zip | |
IB/hfi1: Add interlock between a TID RDMA request and other requests
This locking mechanism is designed to provent vavious memory corruption
scenarios from occurring when requests are pipelined, especially when
RDMA READ/WRITE requests are interleaved with TID RDMA READ/WRITE
requests:
1. READ-AFTER-READ;
2. READ-AFTER-WRITE;
3. WRITE-AFTER-READ;
When memory corruption is likely, a request will be held back until
previous requests have been completed.
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/verbs.h')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/verbs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/verbs.h b/drivers/infiniband/hw/hfi1/verbs.h index 7642b59ad5d2..841727a684d5 100644 --- a/drivers/infiniband/hw/hfi1/verbs.h +++ b/drivers/infiniband/hw/hfi1/verbs.h @@ -171,6 +171,9 @@ struct hfi1_qp_priv { u8 hdr_type; /* 9B or 16B */ unsigned long tid_timer_timeout_jiffies; + /* variables for the TID RDMA SE state machine */ + u32 s_flags; + /* For TID RDMA READ */ u32 tid_r_reqs; /* Num of tid reads requested */ u32 tid_r_comp; /* Num of tid reads completed */ |