391 lines
9.3 KiB
C
391 lines
9.3 KiB
C
/*
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* Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2007, 2008 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/slab.h>
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#include <linux/export.h>
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#include <linux/errno.h>
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#include <net/devlink.h>
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#include "mlx4.h"
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static DEFINE_MUTEX(intf_mutex);
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static DEFINE_IDA(mlx4_adev_ida);
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static bool is_eth_supported(struct mlx4_dev *dev)
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{
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for (int port = 1; port <= dev->caps.num_ports; port++)
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if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
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return true;
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return false;
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}
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static bool is_ib_supported(struct mlx4_dev *dev)
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{
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for (int port = 1; port <= dev->caps.num_ports; port++)
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if (dev->caps.port_type[port] == MLX4_PORT_TYPE_IB)
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return true;
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if (dev->caps.flags & MLX4_DEV_CAP_FLAG_IBOE)
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return true;
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return false;
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}
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static const struct mlx4_adev_device {
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const char *suffix;
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bool (*is_supported)(struct mlx4_dev *dev);
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} mlx4_adev_devices[] = {
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{ "eth", is_eth_supported },
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{ "ib", is_ib_supported },
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};
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int mlx4_adev_init(struct mlx4_dev *dev)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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priv->adev_idx = ida_alloc(&mlx4_adev_ida, GFP_KERNEL);
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if (priv->adev_idx < 0)
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return priv->adev_idx;
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priv->adev = kcalloc(ARRAY_SIZE(mlx4_adev_devices),
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sizeof(struct mlx4_adev *), GFP_KERNEL);
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if (!priv->adev) {
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ida_free(&mlx4_adev_ida, priv->adev_idx);
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return -ENOMEM;
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}
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return 0;
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}
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void mlx4_adev_cleanup(struct mlx4_dev *dev)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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kfree(priv->adev);
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ida_free(&mlx4_adev_ida, priv->adev_idx);
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}
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static void adev_release(struct device *dev)
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{
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struct mlx4_adev *mlx4_adev =
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container_of(dev, struct mlx4_adev, adev.dev);
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struct mlx4_priv *priv = mlx4_priv(mlx4_adev->mdev);
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int idx = mlx4_adev->idx;
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kfree(mlx4_adev);
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priv->adev[idx] = NULL;
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}
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static struct mlx4_adev *add_adev(struct mlx4_dev *dev, int idx)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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const char *suffix = mlx4_adev_devices[idx].suffix;
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struct auxiliary_device *adev;
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struct mlx4_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 = priv->adev_idx;
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adev->name = suffix;
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adev->dev.parent = &dev->persist->pdev->dev;
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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 mlx4_register_auxiliary_driver(struct mlx4_adrv *madrv)
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{
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return auxiliary_driver_register(&madrv->adrv);
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}
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EXPORT_SYMBOL_GPL(mlx4_register_auxiliary_driver);
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void mlx4_unregister_auxiliary_driver(struct mlx4_adrv *madrv)
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{
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auxiliary_driver_unregister(&madrv->adrv);
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}
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EXPORT_SYMBOL_GPL(mlx4_unregister_auxiliary_driver);
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int mlx4_do_bond(struct mlx4_dev *dev, bool enable)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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int i, ret;
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if (!(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PORT_REMAP))
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return -EOPNOTSUPP;
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ret = mlx4_disable_rx_port_check(dev, enable);
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if (ret) {
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mlx4_err(dev, "Fail to %s rx port check\n",
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enable ? "enable" : "disable");
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return ret;
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}
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if (enable) {
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dev->flags |= MLX4_FLAG_BONDED;
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} else {
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ret = mlx4_virt2phy_port_map(dev, 1, 2);
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if (ret) {
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mlx4_err(dev, "Fail to reset port map\n");
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return ret;
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}
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dev->flags &= ~MLX4_FLAG_BONDED;
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}
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mutex_lock(&intf_mutex);
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for (i = 0; i < ARRAY_SIZE(mlx4_adev_devices); i++) {
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struct mlx4_adev *madev = priv->adev[i];
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struct mlx4_adrv *madrv;
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enum mlx4_protocol protocol;
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if (!madev)
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continue;
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device_lock(&madev->adev.dev);
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if (!madev->adev.dev.driver) {
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device_unlock(&madev->adev.dev);
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continue;
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}
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madrv = container_of(madev->adev.dev.driver, struct mlx4_adrv,
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adrv.driver);
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if (!(madrv->flags & MLX4_INTFF_BONDING)) {
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device_unlock(&madev->adev.dev);
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continue;
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}
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if (mlx4_is_mfunc(dev)) {
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mlx4_dbg(dev,
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"SRIOV, disabled HA mode for intf proto %d\n",
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madrv->protocol);
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device_unlock(&madev->adev.dev);
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continue;
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}
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protocol = madrv->protocol;
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device_unlock(&madev->adev.dev);
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del_adev(&madev->adev);
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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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mlx4_warn(dev, "Device[%d] (%s) failed to load\n", i,
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mlx4_adev_devices[i].suffix);
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priv->adev[i] = NULL;
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continue;
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}
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mlx4_dbg(dev,
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"Interface for protocol %d restarted with bonded mode %s\n",
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protocol, enable ? "enabled" : "disabled");
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}
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mutex_unlock(&intf_mutex);
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return 0;
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}
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void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type,
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void *param)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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atomic_notifier_call_chain(&priv->event_nh, type, param);
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}
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int mlx4_register_event_notifier(struct mlx4_dev *dev,
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struct notifier_block *nb)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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return atomic_notifier_chain_register(&priv->event_nh, nb);
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}
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EXPORT_SYMBOL(mlx4_register_event_notifier);
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int mlx4_unregister_event_notifier(struct mlx4_dev *dev,
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struct notifier_block *nb)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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return atomic_notifier_chain_unregister(&priv->event_nh, nb);
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}
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EXPORT_SYMBOL(mlx4_unregister_event_notifier);
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static int add_drivers(struct mlx4_dev *dev)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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int i, ret = 0;
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for (i = 0; i < ARRAY_SIZE(mlx4_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 (mlx4_adev_devices[i].is_supported)
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is_supported = mlx4_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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mlx4_warn(dev, "Device[%d] (%s) failed to load\n", i,
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mlx4_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
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* continue. */
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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 mlx4_dev *dev)
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{
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struct mlx4_priv *priv = mlx4_priv(dev);
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bool delete_all;
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int i;
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delete_all = !(dev->persist->interface_state & MLX4_INTERFACE_STATE_UP);
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for (i = ARRAY_SIZE(mlx4_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 (mlx4_adev_devices[i].is_supported && !delete_all)
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is_supported = mlx4_adev_devices[i].is_supported(dev);
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if (is_supported)
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continue;
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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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}
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/* This function is used after mlx4_dev is reconfigured.
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*/
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static int rescan_drivers_locked(struct mlx4_dev *dev)
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{
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lockdep_assert_held(&intf_mutex);
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delete_drivers(dev);
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if (!(dev->persist->interface_state & MLX4_INTERFACE_STATE_UP))
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return 0;
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return add_drivers(dev);
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}
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int mlx4_register_device(struct mlx4_dev *dev)
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{
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int ret;
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mutex_lock(&intf_mutex);
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dev->persist->interface_state |= MLX4_INTERFACE_STATE_UP;
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ret = rescan_drivers_locked(dev);
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mutex_unlock(&intf_mutex);
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if (ret) {
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mlx4_unregister_device(dev);
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return ret;
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}
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mlx4_start_catas_poll(dev);
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return ret;
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}
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void mlx4_unregister_device(struct mlx4_dev *dev)
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{
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if (!(dev->persist->interface_state & MLX4_INTERFACE_STATE_UP))
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return;
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mlx4_stop_catas_poll(dev);
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if (dev->persist->interface_state & MLX4_INTERFACE_STATE_DELETION &&
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mlx4_is_slave(dev)) {
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/* In mlx4_remove_one on a VF */
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u32 slave_read =
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swab32(readl(&mlx4_priv(dev)->mfunc.comm->slave_read));
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if (mlx4_comm_internal_err(slave_read)) {
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mlx4_dbg(dev, "%s: comm channel is down, entering error state.\n",
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__func__);
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mlx4_enter_error_state(dev->persist);
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}
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}
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mutex_lock(&intf_mutex);
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dev->persist->interface_state &= ~MLX4_INTERFACE_STATE_UP;
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rescan_drivers_locked(dev);
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mutex_unlock(&intf_mutex);
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}
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struct devlink_port *mlx4_get_devlink_port(struct mlx4_dev *dev, int port)
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{
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struct mlx4_port_info *info = &mlx4_priv(dev)->port[port];
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return &info->devlink_port;
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}
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EXPORT_SYMBOL_GPL(mlx4_get_devlink_port);
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