RDMA: Add a dedicated CQ resource tracker function

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

Link: https://lore.kernel.org/r/20200623113043.1228482-6-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

@@ -2617,6 +2617,7 @@ void ib_set_device_ops(struct ib_device *dev, const struct ib_device_ops *ops)
 	SET_DEVICE_OP(dev_ops, drain_rq);
 	SET_DEVICE_OP(dev_ops, drain_sq);
 	SET_DEVICE_OP(dev_ops, enable_driver);
+	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_stat_mr_entry);

drivers/infiniband/core/nldev.c

@@ -598,9 +598,8 @@ static int fill_res_cq_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_cq_entry)
+		return dev->ops.fill_res_cq_entry(msg, cq);
 	return 0;
 
 err:	return -EMSGSIZE;

drivers/infiniband/hw/cxgb4/iw_cxgb4.h

@@ -1056,6 +1056,7 @@ struct c4iw_wr_wait *c4iw_alloc_wr_wait(gfp_t gfp);
 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);
 extern c4iw_restrack_func *c4iw_restrack_funcs[RDMA_RESTRACK_MAX];
 
 #endif

drivers/infiniband/hw/cxgb4/provider.c

@@ -485,6 +485,7 @@ static const struct ib_device_ops c4iw_dev_ops = {
 	.destroy_cq = c4iw_destroy_cq,
 	.destroy_qp = c4iw_destroy_qp,
 	.destroy_srq = c4iw_destroy_srq,
+	.fill_res_cq_entry = c4iw_fill_res_cq_entry,
 	.fill_res_entry = fill_res_entry,
 	.fill_res_mr_entry = c4iw_fill_res_mr_entry,
 	.get_dev_fw_str = get_dev_fw_str,

drivers/infiniband/hw/cxgb4/restrack.c

@@ -372,10 +372,8 @@ static int fill_swcqes(struct sk_buff *msg, struct t4_cq *cq,
 	return -EMSGSIZE;
 }
 
-static int fill_res_cq_entry(struct sk_buff *msg,
-			     struct rdma_restrack_entry *res)
+int c4iw_fill_res_cq_entry(struct sk_buff *msg, struct ib_cq *ibcq)
 {
-	struct ib_cq *ibcq = container_of(res, struct ib_cq, res);
 	struct c4iw_cq *chp = to_c4iw_cq(ibcq);
 	struct nlattr *table_attr;
 	struct t4_cqe hwcqes[2];
@@ -494,5 +492,4 @@ 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,
-	[RDMA_RESTRACK_CQ]	= fill_res_cq_entry,
 };

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -1266,6 +1266,6 @@ void hns_roce_handle_device_err(struct hns_roce_dev *hr_dev);
 int hns_roce_init(struct hns_roce_dev *hr_dev);
 void hns_roce_exit(struct hns_roce_dev *hr_dev);
 
-int hns_roce_fill_res_entry(struct sk_buff *msg,
-			    struct rdma_restrack_entry *res);
+int hns_roce_fill_res_cq_entry(struct sk_buff *msg,
+			       struct ib_cq *ib_cq);
 #endif /* _HNS_ROCE_DEVICE_H */

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -428,7 +428,7 @@ static const struct ib_device_ops hns_roce_dev_ops = {
 	.destroy_ah = hns_roce_destroy_ah,
 	.destroy_cq = hns_roce_destroy_cq,
 	.disassociate_ucontext = hns_roce_disassociate_ucontext,
-	.fill_res_entry = hns_roce_fill_res_entry,
+	.fill_res_cq_entry = hns_roce_fill_res_cq_entry,
 	.get_dma_mr = hns_roce_get_dma_mr,
 	.get_link_layer = hns_roce_get_link_layer,
 	.get_port_immutable = hns_roce_port_immutable,

drivers/infiniband/hw/hns/hns_roce_restrack.c

@@ -76,10 +76,9 @@ static int hns_roce_fill_cq(struct sk_buff *msg,
 	return -EMSGSIZE;
 }
 
-static int hns_roce_fill_res_cq_entry(struct sk_buff *msg,
-				      struct rdma_restrack_entry *res)
+int hns_roce_fill_res_cq_entry(struct sk_buff *msg,
+			       struct ib_cq *ib_cq)
 {
-	struct ib_cq *ib_cq = container_of(res, struct ib_cq, res);
 	struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device);
 	struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq);
 	struct hns_roce_v2_cq_context *context;
@@ -119,12 +118,3 @@ static int hns_roce_fill_res_cq_entry(struct sk_buff *msg,
 	kfree(context);
 	return ret;
 }
-
-int hns_roce_fill_res_entry(struct sk_buff *msg,
-			    struct rdma_restrack_entry *res)
-{
-	if (res->type == RDMA_RESTRACK_CQ)
-		return hns_roce_fill_res_cq_entry(msg, res);
-
-	return 0;
-}

include/rdma/ib_verbs.h

@@ -2584,6 +2584,7 @@ struct ib_device_ops {
 	int (*fill_res_entry)(struct sk_buff *msg,
 			      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);
 
 	/* Device lifecycle callbacks */
 	/*