RDMA/mlx5: Move init and cleanup of UMR to umr.c

The first patch in a series to split UMR logic to a dedicated file.  As a
start, move the init and cleanup of UMR resources to umr.c.

Link: https://lore.kernel.org/r/849e632dd1945a2534712a320cc5779f2149ba96.1649747695.git.leonro@nvidia.com
Signed-off-by: Aharon Landau <aharonl@nvidia.com>
Reviewed-by: Michael Guralnik <michaelgur@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

1 files changed, 106 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mlx5/umr.c b/drivers/infiniband/hw/mlx5/umr.c
new file mode 100644
index 000000000000..46eaf919eb49
--- /dev/null
+++ b/drivers/infiniband/hw/mlx5/umr.c
@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. */
+
+#include "mlx5_ib.h"
+#include "umr.h"
+
+enum {
+	MAX_UMR_WR = 128,
+};
+
+static int mlx5r_umr_qp_rst2rts(struct mlx5_ib_dev *dev, struct ib_qp *qp)
+{
+	struct ib_qp_attr attr = {};
+	int ret;
+
+	attr.qp_state = IB_QPS_INIT;
+	attr.port_num = 1;
+	ret = ib_modify_qp(qp, &attr,
+			   IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT);
+	if (ret) {
+		mlx5_ib_dbg(dev, "Couldn't modify UMR QP\n");
+		return ret;
+	}
+
+	memset(&attr, 0, sizeof(attr));
+	attr.qp_state = IB_QPS_RTR;
+
+	ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
+	if (ret) {
+		mlx5_ib_dbg(dev, "Couldn't modify umr QP to rtr\n");
+		return ret;
+	}
+
+	memset(&attr, 0, sizeof(attr));
+	attr.qp_state = IB_QPS_RTS;
+	ret = ib_modify_qp(qp, &attr, IB_QP_STATE);
+	if (ret) {
+		mlx5_ib_dbg(dev, "Couldn't modify umr QP to rts\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+int mlx5r_umr_resource_init(struct mlx5_ib_dev *dev)
+{
+	struct ib_qp_init_attr init_attr = {};
+	struct ib_pd *pd;
+	struct ib_cq *cq;
+	struct ib_qp *qp;
+	int ret;
+
+	pd = ib_alloc_pd(&dev->ib_dev, 0);
+	if (IS_ERR(pd)) {
+		mlx5_ib_dbg(dev, "Couldn't create PD for sync UMR QP\n");
+		return PTR_ERR(pd);
+	}
+
+	cq = ib_alloc_cq(&dev->ib_dev, NULL, 128, 0, IB_POLL_SOFTIRQ);
+	if (IS_ERR(cq)) {
+		mlx5_ib_dbg(dev, "Couldn't create CQ for sync UMR QP\n");
+		ret = PTR_ERR(cq);
+		goto destroy_pd;
+	}
+
+	init_attr.send_cq = cq;
+	init_attr.recv_cq = cq;
+	init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
+	init_attr.cap.max_send_wr = MAX_UMR_WR;
+	init_attr.cap.max_send_sge = 1;
+	init_attr.qp_type = MLX5_IB_QPT_REG_UMR;
+	init_attr.port_num = 1;
+	qp = ib_create_qp(pd, &init_attr);
+	if (IS_ERR(qp)) {
+		mlx5_ib_dbg(dev, "Couldn't create sync UMR QP\n");
+		ret = PTR_ERR(qp);
+		goto destroy_cq;
+	}
+
+	ret = mlx5r_umr_qp_rst2rts(dev, qp);
+	if (ret)
+		goto destroy_qp;
+
+	dev->umrc.qp = qp;
+	dev->umrc.cq = cq;
+	dev->umrc.pd = pd;
+
+	sema_init(&dev->umrc.sem, MAX_UMR_WR);
+
+	return 0;
+
+destroy_qp:
+	ib_destroy_qp(qp);
+destroy_cq:
+	ib_free_cq(cq);
+destroy_pd:
+	ib_dealloc_pd(pd);
+	return ret;
+}
+
+void mlx5r_umr_resource_cleanup(struct mlx5_ib_dev *dev)
+{
+	ib_destroy_qp(dev->umrc.qp);
+	ib_free_cq(dev->umrc.cq);
+	ib_dealloc_pd(dev->umrc.pd);
+}