path: root/drivers/infiniband/hw/ocrdma/ocrdma_hw.h
diff options
authorDevesh Sharma <devesh.sharma@emulex.com>2014-02-04 11:56:54 +0530
committerRoland Dreier <roland@purestorage.com>2014-04-03 08:29:34 -0700
commitea61762679cd4d409dcaa6f502f190f4c8156d09 (patch)
tree5827d101e41788a4ff93c2368eaa4d3ec5ae337a /drivers/infiniband/hw/ocrdma/ocrdma_hw.h
parentRDMA/ocrdma: Fix compiler warning (diff)
RDMA/ocrdma: EQ full catastrophe avoidance
Stale entries in the CQ being destroyed causes hardware to generate EQEs indefinitely for a given CQ. Thus causing uncontrolled execution of irq_handler. This patch fixes this using following sementics: * irq_handler will ring EQ doorbell atleast once and implement budgeting scheme. * cq_destroy will count number of valid entires during destroy and ring cq-db so that hardware does not generate uncontrolled EQE. * cq_destroy will synchronize with last running irq_handler instance. * arm_cq will always defer arming CQ till poll_cq, except for the first arm_cq call. * poll_cq will always ring cq-db with arm=SET if arm_cq was called prior to enter poll_cq. * poll_cq will always ring cq-db with arm=UNSET if arm_cq was not called prior to enter poll_cq. Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com> Signed-off-by: Selvin Xavier <selvin.xavier@emulex.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to '')
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.h b/drivers/infiniband/hw/ocrdma/ocrdma_hw.h
index db3d55f368bf..77da536d5d96 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.h
@@ -131,5 +131,6 @@ int ocrdma_qp_state_change(struct ocrdma_qp *, enum ib_qp_state new_state,
bool ocrdma_is_qp_in_sq_flushlist(struct ocrdma_cq *, struct ocrdma_qp *);
bool ocrdma_is_qp_in_rq_flushlist(struct ocrdma_cq *, struct ocrdma_qp *);
void ocrdma_flush_qp(struct ocrdma_qp *);
+int ocrdma_get_irq(struct ocrdma_dev *dev, struct ocrdma_eq *eq);
#endif /* __OCRDMA_HW_H__ */