diff options
| author | Kaike Wan <kaike.wan@intel.com> | 2019-03-18 12:20:59 -0700 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-04-03 15:27:39 -0300 |
| commit | 747b931fbe2362366dee30617f816501f3126882 (patch) | |
| tree | 4172a012dd4df1245a14be6f4df1bb3c920bad7f /drivers/infiniband/hw/hfi1/driver.c | |
| parent | 8da0f0f26f80612efadc23beb72d5b66a498a386 (diff) | |
IB/hfi1: Implement CCA for TID RDMA protocol
Currently, FECN handling is not implemented on TID RDMA expected receive
packets and therefore CCA can't be turned on when TID RDMA is
enabled. This patch adds the CCA support to TID RDMA protocol by:
- modifying FECN RSM rule to include kernel receive contexts
- For TID_RDMA READ RESP or TID RDMA ACK packet, a CNP will be sent out if
the FECN bit is set. For other TID RDMA packets that generate at least
one response packet, the BECN bit will be set in the first response
packet
- Copying expected packet data to destination buffer when FECN bit is set
in the TID RDMA READ RESP or TID RDMA WRITE DATA packet. In this case,
the expected packet is received as an eager packet
- Handling the TID sequence error for subsequent normal expected packets.
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/driver.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/driver.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/hfi1/driver.c b/drivers/infiniband/hw/hfi1/driver.c index 2a9d2912f5db..1f4fe0269b51 100644 --- a/drivers/infiniband/hw/hfi1/driver.c +++ b/drivers/infiniband/hw/hfi1/driver.c @@ -516,7 +516,9 @@ bool hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt, */ do_cnp = prescan || (opcode >= IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST && - opcode <= IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE); + opcode <= IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE) || + opcode == TID_OP(READ_RESP) || + opcode == TID_OP(ACK); /* Call appropriate CNP handler */ if (!ignore_fecn && do_cnp && fecn) |