[ofa-general] [PATCH 13/16] ib/core: Add support for modify CQ

[Eli Cohen]

Add support for modify CQ

Add support for modifying CQ parameters for controlling
event generation moderation.

Signed-off-by: Eli Cohen <eli at mellnaox.co.il>
---
 drivers/infiniband/core/verbs.c |    7 +++++++
 include/rdma/ib_verbs.h         |   12 ++++++++++++
 2 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 86ed8af..84709ed 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -628,6 +628,13 @@ struct ib_cq *ib_create_cq(struct ib_device *device,
 }
 EXPORT_SYMBOL(ib_create_cq);
 
+int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
+{
+	return cq->device->modify_cq ?
+		cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
+}
+EXPORT_SYMBOL(ib_modify_cq);
+
 int ib_destroy_cq(struct ib_cq *cq)
 {
 	if (atomic_read(&cq->usecnt))
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 8412566..fa6e32e 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -984,6 +984,8 @@ struct ib_device {
 						int comp_vector,
 						struct ib_ucontext *context,
 						struct ib_udata *udata);
+	int                        (*modify_cq)(struct ib_cq *cq, u16 cq_count,
+						u16 cq_period);
 	int                        (*destroy_cq)(struct ib_cq *cq);
 	int                        (*resize_cq)(struct ib_cq *cq, int cqe,
 						struct ib_udata *udata);
@@ -1389,6 +1391,16 @@ struct ib_cq *ib_create_cq(struct ib_device *device,
 int ib_resize_cq(struct ib_cq *cq, int cqe);
 
 /**
+ * ib_modify_cq - Modifies moderation params of the CQ
+ * @cq: The CQ to modify.
+ * @cq_count: number of CQEs that will tirgger an event
+ * @cq_period: max period of time beofre triggering an event
+ *
+ * Users can examine the cq structure to determine the actual CQ size.
+ */
+int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
+
+/**
  * ib_destroy_cq - Destroys the specified CQ.
  * @cq: The CQ to destroy.
  */
-- 
1.5.3.8