IB/isert: use new shared CQ mechanism

Have the driver use shared CQs provided by the rdma core driver.  Since
this provides similar functionality to iser_comp it has been removed.

Now there is no reason to allocate very large CQs when the driver is
loaded while gaining the advantage of shared CQs. Previously when a single
connection was opened a CQ was opened for every core with enough space for
eight connections, this is a very large overhead that in most cases will
not be utilized.

Link: https://lore.kernel.org/r/20200722135629.49467-2-maxg@mellanox.com
Signed-off-by: Yamin Friedman <yaminf@mellanox.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

1 files changed, 2 insertions, 16 deletions

diff --git a/drivers/infiniband/ulp/isert/ib_isert.h b/drivers/infiniband/ulp/isert/ib_isert.h
index c9ccf1d87833..c55f7d9bfced 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.h
+++ b/drivers/infiniband/ulp/isert/ib_isert.h
@@ -156,6 +156,8 @@ struct isert_conn {
 	struct iser_tx_desc	login_tx_desc;
 	struct rdma_cm_id	*cm_id;
 	struct ib_qp		*qp;
+	struct ib_cq		*cq;
+	u32			cq_size;
 	struct isert_device	*device;
 	struct mutex		mutex;
 	struct kref		kref;
@@ -166,22 +168,6 @@ struct isert_conn {
 	bool			dev_removed;
 };
 
-#define ISERT_MAX_CQ 64
-
-/**
- * struct isert_comp - iSER completion context
- *
- * @device:     pointer to device handle
- * @cq:         completion queue
- * @active_qps: Number of active QPs attached
- *              to completion context
- */
-struct isert_comp {
-	struct isert_device     *device;
-	struct ib_cq		*cq;
-	int                      active_qps;
-};
-
 struct isert_device {
 	bool			pi_capable;
 	int			refcount;