RDMA: Add dedicated QP resource tracker function

In order to avoid double multiplexing of the resource when it is a QP, add
a dedicated callback function.

Link: https://lore.kernel.org/r/20200623113043.1228482-7-leon@kernel.org
Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

Author: Maor Gottlieb

drivers/infiniband/core/device.c

@@ -2620,6 +2620,7 @@ void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
 	SET_DEVICE_OP(dev_ops, fill_res_cq_entry);
 	SET_DEVICE_OP(dev_ops, fill_res_entry);
 	SET_DEVICE_OP(dev_ops, fill_res_mr_entry);
+	SET_DEVICE_OP(dev_ops, fill_res_qp_entry);
 	SET_DEVICE_OP(dev_ops, fill_stat_mr_entry);
 	SET_DEVICE_OP(dev_ops, get_dev_fw_str);
 	SET_DEVICE_OP(dev_ops, get_dma_mr);

drivers/infiniband/core/nldev.c

@@ -507,9 +507,8 @@ static int fill_res_qp_entry(struct sk_buff *msg, bool has_cap_net_admin,
 	if (fill_res_name_pid(msg, res))
 		goto err;
 
-	if (fill_res_entry(dev, msg, res))
-		goto err;
-
+	if (dev->ops.fill_res_qp_entry)
+		return dev->ops.fill_res_qp_entry(msg, qp);
 	return 0;
 
 err:	return -EMSGSIZE;

drivers/infiniband/hw/cxgb4/iw_cxgb4.h

@@ -1057,6 +1057,7 @@ typedef int c4iw_restrack_func(struct sk_buff *msg,
 			       struct rdma_restrack_entry *res);
 int c4iw_fill_res_mr_entry(struct sk_buff *msg, struct ib_mr *ibmr);
 int c4iw_fill_res_cq_entry(struct sk_buff *msg, struct ib_cq *ibcq);
+int c4iw_fill_res_qp_entry(struct sk_buff *msg, struct ib_qp *ibqp);
 extern c4iw_restrack_func *c4iw_restrack_funcs[RDMA_RESTRACK_MAX];
 
 #endif

drivers/infiniband/hw/cxgb4/restrack.c

@@ -134,10 +134,8 @@ static int fill_swsqes(struct sk_buff *msg, struct t4_sq *sq,
 	return -EMSGSIZE;
 }
 
-static int fill_res_qp_entry(struct sk_buff *msg,
-			     struct rdma_restrack_entry *res)
+int c4iw_fill_res_qp_entry(struct sk_buff *msg, struct ib_qp *ibqp)
 {
-	struct ib_qp *ibqp = container_of(res, struct ib_qp, res);
 	struct t4_swsqe *fsp = NULL, *lsp = NULL;
 	struct c4iw_qp *qhp = to_c4iw_qp(ibqp);
 	u16 first_sq_idx = 0, last_sq_idx = 0;
@@ -490,6 +488,5 @@ int c4iw_fill_res_mr_entry(struct sk_buff *msg, struct ib_mr *ibmr)
 }
 
 c4iw_restrack_func *c4iw_restrack_funcs[RDMA_RESTRACK_MAX] = {
-	[RDMA_RESTRACK_QP]	= fill_res_qp_entry,
 	[RDMA_RESTRACK_CM_ID]	= fill_res_ep_entry,
 };

include/rdma/ib_verbs.h

@@ -2585,6 +2585,7 @@ struct ib_device_ops {
 			      struct rdma_restrack_entry *entry);
 	int (*fill_res_mr_entry)(struct sk_buff *msg, struct ib_mr *ibmr);
 	int (*fill_res_cq_entry)(struct sk_buff *msg, struct ib_cq *ibcq);
+	int (*fill_res_qp_entry)(struct sk_buff *msg, struct ib_qp *ibqp);
 
 	/* Device lifecycle callbacks */
 	/*