net/mlx5: Add functions to set/query MFRL register

Add functions to query and set the MFRL reset options supported by
firmware.

Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Makefile b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
index b24aeee..2d477f9 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/Makefile
+++ b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
@@ -16,7 +16,7 @@ mlx5_core-y :=        main.o cmd.o debugfs.o fw.o eq.o uar.o pagealloc.o \
                transobj.o vport.o sriov.o fs_cmd.o fs_core.o pci_irq.o \
                fs_counters.o rl.o lag.o dev.o events.o wq.o lib/gid.o \
                lib/devcom.o lib/pci_vsc.o lib/dm.o diag/fs_tracepoint.o \
-               diag/fw_tracer.o diag/crdump.o devlink.o diag/rsc_dump.o
+               diag/fw_tracer.o diag/crdump.o devlink.o diag/rsc_dump.o fw_reset.o
 
 #
 # Netdev basic

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
new file mode 100644 (file)
index 0000000..7feae82
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/* Copyright (c) 2020, Mellanox Technologies inc.  All rights reserved. */
+
+#include "fw_reset.h"
+
+static int mlx5_reg_mfrl_set(struct mlx5_core_dev *dev, u8 reset_level,
+                            u8 reset_type_sel, u8 sync_resp, bool sync_start)
+{
+       u32 out[MLX5_ST_SZ_DW(mfrl_reg)] = {};
+       u32 in[MLX5_ST_SZ_DW(mfrl_reg)] = {};
+
+       MLX5_SET(mfrl_reg, in, reset_level, reset_level);
+       MLX5_SET(mfrl_reg, in, rst_type_sel, reset_type_sel);
+       MLX5_SET(mfrl_reg, in, pci_sync_for_fw_update_resp, sync_resp);
+       MLX5_SET(mfrl_reg, in, pci_sync_for_fw_update_start, sync_start);
+
+       return mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), MLX5_REG_MFRL, 0, 1);
+}
+
+static int mlx5_reg_mfrl_query(struct mlx5_core_dev *dev, u8 *reset_level, u8 *reset_type)
+{
+       u32 out[MLX5_ST_SZ_DW(mfrl_reg)] = {};
+       u32 in[MLX5_ST_SZ_DW(mfrl_reg)] = {};
+       int err;
+
+       err = mlx5_core_access_reg(dev, in, sizeof(in), out, sizeof(out), MLX5_REG_MFRL, 0, 0);
+       if (err)
+               return err;
+
+       if (reset_level)
+               *reset_level = MLX5_GET(mfrl_reg, out, reset_level);
+       if (reset_type)
+               *reset_type = MLX5_GET(mfrl_reg, out, reset_type);
+
+       return 0;
+}
+
+int mlx5_fw_reset_query(struct mlx5_core_dev *dev, u8 *reset_level, u8 *reset_type)
+{
+       return mlx5_reg_mfrl_query(dev, reset_level, reset_type);
+}
+
+int mlx5_fw_reset_set_reset_sync(struct mlx5_core_dev *dev, u8 reset_type_sel)
+{
+       return mlx5_reg_mfrl_set(dev, MLX5_MFRL_REG_RESET_LEVEL3, reset_type_sel, 0, true);
+}
+
+int mlx5_fw_reset_set_live_patch(struct mlx5_core_dev *dev)
+{
+       return mlx5_reg_mfrl_set(dev, MLX5_MFRL_REG_RESET_LEVEL0, 0, 0, false);
+}

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.h b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.h
new file mode 100644 (file)
index 0000000..10b5f10
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/* Copyright (c) 2020, Mellanox Technologies inc.  All rights reserved. */
+
+#ifndef __MLX5_FW_RESET_H
+#define __MLX5_FW_RESET_H
+
+#include "mlx5_core.h"
+
+int mlx5_fw_reset_query(struct mlx5_core_dev *dev, u8 *reset_level, u8 *reset_type);
+int mlx5_fw_reset_set_reset_sync(struct mlx5_core_dev *dev, u8 reset_type_sel);
+int mlx5_fw_reset_set_live_patch(struct mlx5_core_dev *dev);
+
+#endif