634 lines
15 KiB
C
634 lines
15 KiB
C
/*
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* Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/mlx5/driver.h>
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#include <linux/mlx5/eswitch.h>
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#include <linux/mlx5/mlx5_ifc_vdpa.h>
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#include <linux/mlx5/vport.h>
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#include "mlx5_core.h"
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/* intf dev list mutex */
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static DEFINE_MUTEX(mlx5_intf_mutex);
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static DEFINE_IDA(mlx5_adev_ida);
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static bool is_eth_rep_supported(struct mlx5_core_dev *dev)
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{
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if (!IS_ENABLED(CONFIG_MLX5_ESWITCH))
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return false;
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if (!MLX5_ESWITCH_MANAGER(dev))
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return false;
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if (!is_mdev_switchdev_mode(dev))
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return false;
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return true;
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}
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bool mlx5_eth_supported(struct mlx5_core_dev *dev)
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{
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if (!IS_ENABLED(CONFIG_MLX5_CORE_EN))
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return false;
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if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
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return false;
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if (!MLX5_CAP_GEN(dev, eth_net_offloads)) {
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mlx5_core_warn(dev, "Missing eth_net_offloads capability\n");
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return false;
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}
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if (!MLX5_CAP_GEN(dev, nic_flow_table)) {
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mlx5_core_warn(dev, "Missing nic_flow_table capability\n");
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return false;
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}
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if (!MLX5_CAP_ETH(dev, csum_cap)) {
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mlx5_core_warn(dev, "Missing csum_cap capability\n");
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return false;
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}
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if (!MLX5_CAP_ETH(dev, max_lso_cap)) {
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mlx5_core_warn(dev, "Missing max_lso_cap capability\n");
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return false;
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}
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if (!MLX5_CAP_ETH(dev, vlan_cap)) {
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mlx5_core_warn(dev, "Missing vlan_cap capability\n");
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return false;
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}
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if (!MLX5_CAP_ETH(dev, rss_ind_tbl_cap)) {
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mlx5_core_warn(dev, "Missing rss_ind_tbl_cap capability\n");
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return false;
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}
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if (MLX5_CAP_FLOWTABLE(dev,
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flow_table_properties_nic_receive.max_ft_level) < 3) {
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mlx5_core_warn(dev, "max_ft_level < 3\n");
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return false;
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}
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if (!MLX5_CAP_ETH(dev, self_lb_en_modifiable))
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mlx5_core_warn(dev, "Self loop back prevention is not supported\n");
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if (!MLX5_CAP_GEN(dev, cq_moderation))
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mlx5_core_warn(dev, "CQ moderation is not supported\n");
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return true;
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}
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static bool is_eth_enabled(struct mlx5_core_dev *dev)
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{
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union devlink_param_value val;
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int err;
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err = devlink_param_driverinit_value_get(priv_to_devlink(dev),
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DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH,
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&val);
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return err ? false : val.vbool;
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}
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bool mlx5_vnet_supported(struct mlx5_core_dev *dev)
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{
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if (!IS_ENABLED(CONFIG_MLX5_VDPA_NET))
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return false;
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if (mlx5_core_is_pf(dev))
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return false;
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if (!(MLX5_CAP_GEN_64(dev, general_obj_types) &
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MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q))
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return false;
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if (!(MLX5_CAP_DEV_VDPA_EMULATION(dev, event_mode) &
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MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE))
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return false;
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if (!MLX5_CAP_DEV_VDPA_EMULATION(dev, eth_frame_offload_type))
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return false;
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return true;
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}
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static bool is_vnet_enabled(struct mlx5_core_dev *dev)
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{
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union devlink_param_value val;
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int err;
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err = devlink_param_driverinit_value_get(priv_to_devlink(dev),
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DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,
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&val);
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return err ? false : val.vbool;
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}
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static bool is_ib_rep_supported(struct mlx5_core_dev *dev)
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{
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if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
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return false;
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if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
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return false;
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if (!is_eth_rep_supported(dev))
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return false;
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if (!MLX5_ESWITCH_MANAGER(dev))
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return false;
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if (!is_mdev_switchdev_mode(dev))
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return false;
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if (mlx5_core_mp_enabled(dev))
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return false;
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return true;
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}
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static bool is_mp_supported(struct mlx5_core_dev *dev)
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{
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if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
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return false;
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if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
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return false;
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if (is_ib_rep_supported(dev))
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return false;
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if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
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return false;
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if (!mlx5_core_is_mp_slave(dev))
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return false;
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return true;
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}
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bool mlx5_rdma_supported(struct mlx5_core_dev *dev)
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{
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if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
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return false;
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if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
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return false;
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if (is_ib_rep_supported(dev))
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return false;
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if (is_mp_supported(dev))
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return false;
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return true;
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}
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static bool is_ib_enabled(struct mlx5_core_dev *dev)
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{
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union devlink_param_value val;
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int err;
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err = devlink_param_driverinit_value_get(priv_to_devlink(dev),
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DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA,
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&val);
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return err ? false : val.vbool;
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}
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enum {
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MLX5_INTERFACE_PROTOCOL_ETH,
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MLX5_INTERFACE_PROTOCOL_ETH_REP,
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MLX5_INTERFACE_PROTOCOL_IB,
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MLX5_INTERFACE_PROTOCOL_IB_REP,
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MLX5_INTERFACE_PROTOCOL_MPIB,
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MLX5_INTERFACE_PROTOCOL_VNET,
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};
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static const struct mlx5_adev_device {
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const char *suffix;
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bool (*is_supported)(struct mlx5_core_dev *dev);
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bool (*is_enabled)(struct mlx5_core_dev *dev);
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} mlx5_adev_devices[] = {
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[MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet",
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.is_supported = &mlx5_vnet_supported,
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.is_enabled = &is_vnet_enabled },
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[MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma",
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.is_supported = &mlx5_rdma_supported,
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.is_enabled = &is_ib_enabled },
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[MLX5_INTERFACE_PROTOCOL_ETH] = { .suffix = "eth",
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.is_supported = &mlx5_eth_supported,
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.is_enabled = &is_eth_enabled },
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[MLX5_INTERFACE_PROTOCOL_ETH_REP] = { .suffix = "eth-rep",
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.is_supported = &is_eth_rep_supported },
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[MLX5_INTERFACE_PROTOCOL_IB_REP] = { .suffix = "rdma-rep",
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.is_supported = &is_ib_rep_supported },
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[MLX5_INTERFACE_PROTOCOL_MPIB] = { .suffix = "multiport",
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.is_supported = &is_mp_supported },
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};
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int mlx5_adev_idx_alloc(void)
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{
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return ida_alloc(&mlx5_adev_ida, GFP_KERNEL);
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}
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void mlx5_adev_idx_free(int idx)
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{
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ida_free(&mlx5_adev_ida, idx);
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}
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int mlx5_adev_init(struct mlx5_core_dev *dev)
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{
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struct mlx5_priv *priv = &dev->priv;
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priv->adev = kcalloc(ARRAY_SIZE(mlx5_adev_devices),
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sizeof(struct mlx5_adev *), GFP_KERNEL);
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if (!priv->adev)
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return -ENOMEM;
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return 0;
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}
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void mlx5_adev_cleanup(struct mlx5_core_dev *dev)
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{
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struct mlx5_priv *priv = &dev->priv;
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kfree(priv->adev);
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}
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static void adev_release(struct device *dev)
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{
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struct mlx5_adev *mlx5_adev =
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container_of(dev, struct mlx5_adev, adev.dev);
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struct mlx5_priv *priv = &mlx5_adev->mdev->priv;
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int idx = mlx5_adev->idx;
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kfree(mlx5_adev);
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priv->adev[idx] = NULL;
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}
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static struct mlx5_adev *add_adev(struct mlx5_core_dev *dev, int idx)
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{
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const char *suffix = mlx5_adev_devices[idx].suffix;
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struct auxiliary_device *adev;
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struct mlx5_adev *madev;
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int ret;
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madev = kzalloc(sizeof(*madev), GFP_KERNEL);
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if (!madev)
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return ERR_PTR(-ENOMEM);
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adev = &madev->adev;
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adev->id = dev->priv.adev_idx;
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adev->name = suffix;
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adev->dev.parent = dev->device;
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adev->dev.release = adev_release;
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madev->mdev = dev;
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madev->idx = idx;
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ret = auxiliary_device_init(adev);
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if (ret) {
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kfree(madev);
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return ERR_PTR(ret);
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}
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ret = auxiliary_device_add(adev);
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if (ret) {
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auxiliary_device_uninit(adev);
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return ERR_PTR(ret);
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}
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return madev;
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}
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static void del_adev(struct auxiliary_device *adev)
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{
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auxiliary_device_delete(adev);
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auxiliary_device_uninit(adev);
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}
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int mlx5_attach_device(struct mlx5_core_dev *dev)
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{
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struct mlx5_priv *priv = &dev->priv;
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struct auxiliary_device *adev;
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struct auxiliary_driver *adrv;
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int ret = 0, i;
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mutex_lock(&mlx5_intf_mutex);
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priv->flags &= ~MLX5_PRIV_FLAGS_DETACH;
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for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
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if (!priv->adev[i]) {
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bool is_supported = false;
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if (mlx5_adev_devices[i].is_enabled) {
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bool enabled;
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enabled = mlx5_adev_devices[i].is_enabled(dev);
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if (!enabled)
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continue;
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}
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if (mlx5_adev_devices[i].is_supported)
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is_supported = mlx5_adev_devices[i].is_supported(dev);
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if (!is_supported)
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continue;
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priv->adev[i] = add_adev(dev, i);
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if (IS_ERR(priv->adev[i])) {
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ret = PTR_ERR(priv->adev[i]);
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priv->adev[i] = NULL;
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}
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} else {
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adev = &priv->adev[i]->adev;
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/* Pay attention that this is not PCI driver that
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* mlx5_core_dev is connected, but auxiliary driver.
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*
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* Here we can race of module unload with devlink
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* reload, but we don't need to take extra lock because
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* we are holding global mlx5_intf_mutex.
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*/
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if (!adev->dev.driver)
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continue;
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adrv = to_auxiliary_drv(adev->dev.driver);
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if (adrv->resume)
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ret = adrv->resume(adev);
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}
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if (ret) {
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mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
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i, mlx5_adev_devices[i].suffix);
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break;
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}
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}
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mutex_unlock(&mlx5_intf_mutex);
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return ret;
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}
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void mlx5_detach_device(struct mlx5_core_dev *dev)
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{
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struct mlx5_priv *priv = &dev->priv;
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struct auxiliary_device *adev;
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struct auxiliary_driver *adrv;
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pm_message_t pm = {};
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int i;
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mutex_lock(&mlx5_intf_mutex);
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for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
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if (!priv->adev[i])
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continue;
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if (mlx5_adev_devices[i].is_enabled) {
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bool enabled;
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enabled = mlx5_adev_devices[i].is_enabled(dev);
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if (!enabled)
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goto skip_suspend;
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}
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adev = &priv->adev[i]->adev;
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/* Auxiliary driver was unbind manually through sysfs */
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if (!adev->dev.driver)
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goto skip_suspend;
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adrv = to_auxiliary_drv(adev->dev.driver);
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if (adrv->suspend) {
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adrv->suspend(adev, pm);
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continue;
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}
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skip_suspend:
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del_adev(&priv->adev[i]->adev);
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priv->adev[i] = NULL;
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}
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priv->flags |= MLX5_PRIV_FLAGS_DETACH;
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mutex_unlock(&mlx5_intf_mutex);
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}
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int mlx5_register_device(struct mlx5_core_dev *dev)
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{
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int ret;
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mutex_lock(&mlx5_intf_mutex);
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dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
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ret = mlx5_rescan_drivers_locked(dev);
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mutex_unlock(&mlx5_intf_mutex);
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if (ret)
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mlx5_unregister_device(dev);
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return ret;
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}
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void mlx5_unregister_device(struct mlx5_core_dev *dev)
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{
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mutex_lock(&mlx5_intf_mutex);
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dev->priv.flags = MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
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mlx5_rescan_drivers_locked(dev);
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mutex_unlock(&mlx5_intf_mutex);
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}
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static int add_drivers(struct mlx5_core_dev *dev)
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{
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struct mlx5_priv *priv = &dev->priv;
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int i, ret = 0;
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for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
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bool is_supported = false;
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if (priv->adev[i])
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continue;
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if (mlx5_adev_devices[i].is_supported)
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is_supported = mlx5_adev_devices[i].is_supported(dev);
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if (!is_supported)
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continue;
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priv->adev[i] = add_adev(dev, i);
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if (IS_ERR(priv->adev[i])) {
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mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
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i, mlx5_adev_devices[i].suffix);
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/* We continue to rescan drivers and leave to the caller
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* to make decision if to release everything or continue.
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*/
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ret = PTR_ERR(priv->adev[i]);
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priv->adev[i] = NULL;
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}
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}
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return ret;
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}
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static void delete_drivers(struct mlx5_core_dev *dev)
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{
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struct mlx5_priv *priv = &dev->priv;
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bool delete_all;
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int i;
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delete_all = priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
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for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
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bool is_supported = false;
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if (!priv->adev[i])
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continue;
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if (mlx5_adev_devices[i].is_enabled) {
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bool enabled;
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enabled = mlx5_adev_devices[i].is_enabled(dev);
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if (!enabled)
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goto del_adev;
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}
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if (mlx5_adev_devices[i].is_supported && !delete_all)
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is_supported = mlx5_adev_devices[i].is_supported(dev);
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if (is_supported)
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continue;
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|
|
del_adev:
|
|
del_adev(&priv->adev[i]->adev);
|
|
priv->adev[i] = NULL;
|
|
}
|
|
}
|
|
|
|
/* This function is used after mlx5_core_dev is reconfigured.
|
|
*/
|
|
int mlx5_rescan_drivers_locked(struct mlx5_core_dev *dev)
|
|
{
|
|
struct mlx5_priv *priv = &dev->priv;
|
|
|
|
lockdep_assert_held(&mlx5_intf_mutex);
|
|
if (priv->flags & MLX5_PRIV_FLAGS_DETACH)
|
|
return 0;
|
|
|
|
delete_drivers(dev);
|
|
if (priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV)
|
|
return 0;
|
|
|
|
return add_drivers(dev);
|
|
}
|
|
|
|
bool mlx5_same_hw_devs(struct mlx5_core_dev *dev, struct mlx5_core_dev *peer_dev)
|
|
{
|
|
u64 fsystem_guid, psystem_guid;
|
|
|
|
fsystem_guid = mlx5_query_nic_system_image_guid(dev);
|
|
psystem_guid = mlx5_query_nic_system_image_guid(peer_dev);
|
|
|
|
return (fsystem_guid && psystem_guid && fsystem_guid == psystem_guid);
|
|
}
|
|
|
|
static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev)
|
|
{
|
|
return (u32)((pci_domain_nr(dev->pdev->bus) << 16) |
|
|
(dev->pdev->bus->number << 8) |
|
|
PCI_SLOT(dev->pdev->devfn));
|
|
}
|
|
|
|
static int _next_phys_dev(struct mlx5_core_dev *mdev,
|
|
const struct mlx5_core_dev *curr)
|
|
{
|
|
if (!mlx5_core_is_pf(mdev))
|
|
return 0;
|
|
|
|
if (mdev == curr)
|
|
return 0;
|
|
|
|
if (!mlx5_same_hw_devs(mdev, (struct mlx5_core_dev *)curr) &&
|
|
mlx5_gen_pci_id(mdev) != mlx5_gen_pci_id(curr))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void *pci_get_other_drvdata(struct device *this, struct device *other)
|
|
{
|
|
if (this->driver != other->driver)
|
|
return NULL;
|
|
|
|
return pci_get_drvdata(to_pci_dev(other));
|
|
}
|
|
|
|
static int next_phys_dev_lag(struct device *dev, const void *data)
|
|
{
|
|
struct mlx5_core_dev *mdev, *this = (struct mlx5_core_dev *)data;
|
|
|
|
mdev = pci_get_other_drvdata(this->device, dev);
|
|
if (!mdev)
|
|
return 0;
|
|
|
|
if (!MLX5_CAP_GEN(mdev, vport_group_manager) ||
|
|
!MLX5_CAP_GEN(mdev, lag_master) ||
|
|
MLX5_CAP_GEN(mdev, num_lag_ports) != MLX5_MAX_PORTS)
|
|
return 0;
|
|
|
|
return _next_phys_dev(mdev, data);
|
|
}
|
|
|
|
static struct mlx5_core_dev *mlx5_get_next_dev(struct mlx5_core_dev *dev,
|
|
int (*match)(struct device *dev, const void *data))
|
|
{
|
|
struct device *next;
|
|
|
|
if (!mlx5_core_is_pf(dev))
|
|
return NULL;
|
|
|
|
next = bus_find_device(&pci_bus_type, NULL, dev, match);
|
|
if (!next)
|
|
return NULL;
|
|
|
|
put_device(next);
|
|
return pci_get_drvdata(to_pci_dev(next));
|
|
}
|
|
|
|
/* Must be called with intf_mutex held */
|
|
struct mlx5_core_dev *mlx5_get_next_phys_dev_lag(struct mlx5_core_dev *dev)
|
|
{
|
|
lockdep_assert_held(&mlx5_intf_mutex);
|
|
return mlx5_get_next_dev(dev, &next_phys_dev_lag);
|
|
}
|
|
|
|
void mlx5_dev_list_lock(void)
|
|
{
|
|
mutex_lock(&mlx5_intf_mutex);
|
|
}
|
|
void mlx5_dev_list_unlock(void)
|
|
{
|
|
mutex_unlock(&mlx5_intf_mutex);
|
|
}
|
|
|
|
int mlx5_dev_list_trylock(void)
|
|
{
|
|
return mutex_trylock(&mlx5_intf_mutex);
|
|
}
|