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| author |   Kaike Wan <kaike.wan@intel.com> | 2019-02-05 14:13:13 -0800 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2019-02-05 17:53:54 -0500 |
| commit | 37356e78328186814e994e0ad1a1cfd6a142bef4 (patch) | |
| tree | 9b956363e2c08ab89ee62e0d013113b6e05c483d /drivers/infiniband/hw/hfi1/qp.c | |
| parent | IB/hfi: Move RC functions into a header file (diff) | |
| download | linux-dev-37356e78328186814e994e0ad1a1cfd6a142bef4.tar.xz linux-dev-37356e78328186814e994e0ad1a1cfd6a142bef4.zip | |
IB/hfi1: TID RDMA flow allocation
The hfi1 hardware flow is a hardware flow-control mechanism for a KDETH
data packet that is received on a hfi1 port. It validates the packet by
checking both the generation and sequence. Each QP that uses the TID RDMA
mechanism will allocate a hardware flow from its receiving context for
any incoming KDETH data packets.
This patch implements:
(1) a function to allocate hardware flow
(2) a function to free hardware flow
(3) a function to initialize hardware flow generation for a receiving
context
(4) a wait mechanism if the hardware flow is not available
(4) a function to remove the qp from the wait queue for hardware flow
when the qp is reset or destroyed.
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@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/qp.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/qp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hfi1/qp.c b/drivers/infiniband/hw/hfi1/qp.c index f822f92b415f..69c38af49492 100644 --- a/drivers/infiniband/hw/hfi1/qp.c +++ b/drivers/infiniband/hw/hfi1/qp.c @@ -738,6 +738,7 @@ void flush_qp_waiters(struct rvt_qp *qp) { lockdep_assert_held(&qp->s_lock); flush_iowait(qp); + hfi1_tid_rdma_flush_wait(qp); } void stop_send_queue(struct rvt_qp *qp) @@ -745,6 +746,8 @@ void stop_send_queue(struct rvt_qp *qp) struct hfi1_qp_priv *priv = qp->priv; iowait_cancel_work(&priv->s_iowait); + if (cancel_work_sync(&priv->tid_rdma.trigger_work)) + rvt_put_qp(qp); } void quiesce_qp(struct rvt_qp *qp) |