1 files changed, 97 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c b/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c
new file mode 100644
index 000000000..d000236dd
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ecpf.c
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/* Copyright (c) 2019 Mellanox Technologies. */
+
+#include "ecpf.h"
+
+bool mlx5_read_embedded_cpu(struct mlx5_core_dev *dev)
+{
+	return (ioread32be(&dev->iseg->initializing) >> MLX5_ECPU_BIT_NUM) & 1;
+}
+
+static bool mlx5_ecpf_esw_admins_host_pf(const struct mlx5_core_dev *dev)
+{
+	/* In separate host mode, PF enables itself.
+	 * When ECPF is eswitch manager, eswitch enables host PF after
+	 * eswitch is setup.
+	 */
+	return mlx5_core_is_ecpf_esw_manager(dev);
+}
+
+int mlx5_cmd_host_pf_enable_hca(struct mlx5_core_dev *dev)
+{
+	u32 out[MLX5_ST_SZ_DW(enable_hca_out)] = {};
+	u32 in[MLX5_ST_SZ_DW(enable_hca_in)]   = {};
+
+	MLX5_SET(enable_hca_in, in, opcode, MLX5_CMD_OP_ENABLE_HCA);
+	MLX5_SET(enable_hca_in, in, function_id, 0);
+	MLX5_SET(enable_hca_in, in, embedded_cpu_function, 0);
+	return mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out));
+}
+
+int mlx5_cmd_host_pf_disable_hca(struct mlx5_core_dev *dev)
+{
+	u32 out[MLX5_ST_SZ_DW(disable_hca_out)] = {};
+	u32 in[MLX5_ST_SZ_DW(disable_hca_in)]   = {};
+
+	MLX5_SET(disable_hca_in, in, opcode, MLX5_CMD_OP_DISABLE_HCA);
+	MLX5_SET(disable_hca_in, in, function_id, 0);
+	MLX5_SET(disable_hca_in, in, embedded_cpu_function, 0);
+	return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
+}
+
+static int mlx5_host_pf_init(struct mlx5_core_dev *dev)
+{
+	int err;
+
+	if (mlx5_ecpf_esw_admins_host_pf(dev))
+		return 0;
+
+	/* ECPF shall enable HCA for host PF in the same way a PF
+	 * does this for its VFs when ECPF is not a eswitch manager.
+	 */
+	err = mlx5_cmd_host_pf_enable_hca(dev);
+	if (err)
+		mlx5_core_err(dev, "Failed to enable external host PF HCA err(%d)\n", err);
+
+	return err;
+}
+
+static void mlx5_host_pf_cleanup(struct mlx5_core_dev *dev)
+{
+	int err;
+
+	if (mlx5_ecpf_esw_admins_host_pf(dev))
+		return;
+
+	err = mlx5_cmd_host_pf_disable_hca(dev);
+	if (err) {
+		mlx5_core_err(dev, "Failed to disable external host PF HCA err(%d)\n", err);
+		return;
+	}
+}
+
+int mlx5_ec_init(struct mlx5_core_dev *dev)
+{
+	if (!mlx5_core_is_ecpf(dev))
+		return 0;
+
+	return mlx5_host_pf_init(dev);
+}
+
+void mlx5_ec_cleanup(struct mlx5_core_dev *dev)
+{
+	int err;
+
+	if (!mlx5_core_is_ecpf(dev))
+		return;
+
+	mlx5_host_pf_cleanup(dev);
+
+	err = mlx5_wait_for_pages(dev, &dev->priv.page_counters[MLX5_HOST_PF]);
+	if (err)
+		mlx5_core_warn(dev, "Timeout reclaiming external host PF pages err(%d)\n", err);
+
+	err = mlx5_wait_for_pages(dev, &dev->priv.page_counters[MLX5_VF]);
+	if (err)
+		mlx5_core_warn(dev, "Timeout reclaiming external host VFs pages err(%d)\n", err);
+}