RDMA: Convert CQ allocations to be under core responsibility

Ensure that CQ is allocated and freed by IB/core and not by drivers.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Gal Pressman <galpress@amazon.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Tested-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/usnic/usnic_ib.h

@@ -61,6 +61,10 @@ struct usnic_ib_pd {
 	struct usnic_uiom_pd		*umem_pd;
 };
 
+struct usnic_ib_cq {
+	struct ib_cq			ibcq;
+};
+
 struct usnic_ib_mr {
 	struct ib_mr			ibmr;
 	struct usnic_uiom_reg		*umem;

drivers/infiniband/hw/usnic/usnic_ib_main.c

@@ -354,6 +354,7 @@ static const struct ib_device_ops usnic_dev_ops = {
 	.query_qp = usnic_ib_query_qp,
 	.reg_user_mr = usnic_ib_reg_mr,
 	INIT_RDMA_OBJ_SIZE(ib_pd, usnic_ib_pd, ibpd),
+	INIT_RDMA_OBJ_SIZE(ib_cq, usnic_ib_cq, ibcq),
 	INIT_RDMA_OBJ_SIZE(ib_ucontext, usnic_ib_ucontext, ibucontext),
 };
 

drivers/infiniband/hw/usnic/usnic_ib_verbs.c

@@ -587,26 +587,18 @@ out_unlock:
 	return status;
 }
 
-struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev,
-				 const struct ib_cq_init_attr *attr,
-				 struct ib_udata *udata)
+int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
+		       struct ib_udata *udata)
 {
-	struct ib_cq *cq;
-
-	usnic_dbg("\n");
 	if (attr->flags)
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 
-	cq = kzalloc(sizeof(*cq), GFP_KERNEL);
-	if (!cq)
-		return ERR_PTR(-EBUSY);
-
-	return cq;
+	return 0;
 }
 
 void usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 {
-	kfree(cq);
+	return;
 }
 
 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,

drivers/infiniband/hw/usnic/usnic_ib_verbs.h

@@ -58,9 +58,8 @@ struct ib_qp *usnic_ib_create_qp(struct ib_pd *pd,
 int usnic_ib_destroy_qp(struct ib_qp *qp, struct ib_udata *udata);
 int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 				int attr_mask, struct ib_udata *udata);
-struct ib_cq *usnic_ib_create_cq(struct ib_device *ibdev,
-				 const struct ib_cq_init_attr *attr,
-				 struct ib_udata *udata);
+int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
+		       struct ib_udata *udata);
 void usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
 				u64 virt_addr, int access_flags,