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net/mlx4: Lock mlx4 devlink reload callback

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Change devlink instance locks in mlx4 driver to have devlink reload
callback locked, while keeping all driver paths which leads to devl_ API
functions called by the mlx4 driver locked.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Moshe Shemesh 2022-07-28 18:53:48 +03:00 committed by Jakub Kicinski
parent a8c05514b2
commit 60d7ceea4b
2 changed files with 37 additions and 13 deletions
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5
drivers/net/ethernet/mellanox/mlx4/catas.c
View File

@ -204,9 +204,13 @@ out:
static void mlx4_handle_error_state(struct mlx4_dev_persistent *persist)
{
struct mlx4_dev *dev = persist->dev;
struct devlink *devlink;
int err = 0;
mlx4_enter_error_state(persist);
devlink = priv_to_devlink(mlx4_priv(dev));
devl_lock(devlink);
mutex_lock(&persist->interface_state_mutex);
if (persist->interface_state & MLX4_INTERFACE_STATE_UP &&
!(persist->interface_state & MLX4_INTERFACE_STATE_DELETION)) {
@ -215,6 +219,7 @@ static void mlx4_handle_error_state(struct mlx4_dev_persistent *persist)
err);
}
mutex_unlock(&persist->interface_state_mutex);
devl_unlock(devlink);
}
static void dump_err_buf(struct mlx4_dev *dev)

45
drivers/net/ethernet/mellanox/mlx4/main.c
View File

@ -3342,6 +3342,7 @@ static int mlx4_load_one(struct pci_dev *pdev, int pci_dev_data,
struct mlx4_dev_cap *dev_cap = NULL;
int existing_vfs = 0;
devl_assert_locked(devlink);
dev = &priv->dev;
INIT_LIST_HEAD(&priv->ctx_list);
@ -3630,7 +3631,6 @@ slave_start:
}
}
devl_lock(devlink);
for (port = 1; port <= dev->caps.num_ports; port++) {
err = mlx4_init_port_info(dev, port);
if (err)
@ -3644,7 +3644,6 @@ slave_start:
if (err)
goto err_port;
devl_unlock(devlink);
mlx4_request_modules(dev);
mlx4_sense_init(dev);
@ -3661,7 +3660,6 @@ slave_start:
err_port:
for (--port; port >= 1; --port)
mlx4_cleanup_port_info(&priv->port[port]);
devl_unlock(devlink);
mlx4_cleanup_default_counters(dev);
if (!mlx4_is_slave(dev))
@ -3736,7 +3734,6 @@ static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data,
int prb_vf[MLX4_MAX_PORTS + 1] = {0, 0, 0};
const int param_map[MLX4_MAX_PORTS + 1][MLX4_MAX_PORTS + 1] = {
{2, 0, 0}, {0, 1, 2}, {0, 1, 2} };
struct devlink *devlink = priv_to_devlink(priv);
unsigned total_vfs = 0;
unsigned int i;
@ -3849,9 +3846,7 @@ static int __mlx4_init_one(struct pci_dev *pdev, int pci_dev_data,
}
}
devl_lock(devlink);
err = mlx4_crdump_init(&priv->dev);
devl_unlock(devlink);
if (err)
goto err_release_regions;
@ -3869,9 +3864,7 @@ err_catas:
mlx4_catas_end(&priv->dev);
err_crdump:
devl_lock(devlink);
mlx4_crdump_end(&priv->dev);
devl_unlock(devlink);
err_release_regions:
pci_release_regions(pdev);
@ -3965,9 +3958,11 @@ static int mlx4_devlink_reload_down(struct devlink *devlink, bool netns_change,
NL_SET_ERR_MSG_MOD(extack, "Namespace change is not supported");
return -EOPNOTSUPP;
}
devl_lock(devlink);
if (persist->num_vfs)
mlx4_warn(persist->dev, "Reload performed on PF, will cause reset on operating Virtual Functions\n");
mlx4_restart_one_down(persist->pdev);
devl_unlock(devlink);
return 0;
}
@ -3980,8 +3975,10 @@ static int mlx4_devlink_reload_up(struct devlink *devlink, enum devlink_reload_a
struct mlx4_dev_persistent *persist = dev->persist;
int err;
devl_lock(devlink);
*actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
err = mlx4_restart_one_up(persist->pdev, true, devlink);
devl_unlock(devlink);
if (err)
mlx4_err(persist->dev, "mlx4_restart_one_up failed, ret=%d\n",
err);
@ -4008,6 +4005,7 @@ static int mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
devlink = devlink_alloc(&mlx4_devlink_ops, sizeof(*priv), &pdev->dev);
if (!devlink)
return -ENOMEM;
devl_lock(devlink);
priv = devlink_priv(devlink);
dev = &priv->dev;
@ -4035,6 +4033,7 @@ static int mlx4_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
pci_save_state(pdev);
devlink_set_features(devlink, DEVLINK_F_RELOAD);
devl_unlock(devlink);
devlink_register(devlink);
return 0;
@ -4044,6 +4043,7 @@ err_params_unregister:
err_devlink_unregister:
kfree(dev->persist);
err_devlink_free:
devl_unlock(devlink);
devlink_free(devlink);
return ret;
}
@ -4069,6 +4069,7 @@ static void mlx4_unload_one(struct pci_dev *pdev)
int p, i;
devlink = priv_to_devlink(priv);
devl_assert_locked(devlink);
if (priv->removed)
return;
@ -4084,12 +4085,10 @@ static void mlx4_unload_one(struct pci_dev *pdev)
mlx4_stop_sense(dev);
mlx4_unregister_device(dev);
devl_lock(devlink);
for (p = 1; p <= dev->caps.num_ports; p++) {
mlx4_cleanup_port_info(&priv->port[p]);
mlx4_CLOSE_PORT(dev, p);
}
devl_unlock(devlink);
if (mlx4_is_master(dev))
mlx4_free_resource_tracker(dev,
@ -4150,6 +4149,7 @@ static void mlx4_remove_one(struct pci_dev *pdev)
devlink_unregister(devlink);
devl_lock(devlink);
if (mlx4_is_slave(dev))
persist->interface_state |= MLX4_INTERFACE_STATE_NOWAIT;
@ -4174,9 +4174,7 @@ static void mlx4_remove_one(struct pci_dev *pdev)
else
mlx4_info(dev, "%s: interface is down\n", __func__);
mlx4_catas_end(dev);
devl_lock(devlink);
mlx4_crdump_end(dev);
devl_unlock(devlink);
if (dev->flags & MLX4_FLAG_SRIOV && !active_vfs) {
mlx4_warn(dev, "Disabling SR-IOV\n");
pci_disable_sriov(pdev);
@ -4187,6 +4185,7 @@ static void mlx4_remove_one(struct pci_dev *pdev)
devlink_params_unregister(devlink, mlx4_devlink_params,
ARRAY_SIZE(mlx4_devlink_params));
kfree(dev->persist);
devl_unlock(devlink);
devlink_free(devlink);
}
@ -4307,15 +4306,20 @@ static pci_ers_result_t mlx4_pci_err_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
struct mlx4_dev *dev = persist->dev;
struct devlink *devlink;
mlx4_err(persist->dev, "mlx4_pci_err_detected was called\n");
mlx4_enter_error_state(persist);
devlink = priv_to_devlink(mlx4_priv(dev));
devl_lock(devlink);
mutex_lock(&persist->interface_state_mutex);
if (persist->interface_state & MLX4_INTERFACE_STATE_UP)
mlx4_unload_one(pdev);
mutex_unlock(&persist->interface_state_mutex);
devl_unlock(devlink);
if (state == pci_channel_io_perm_failure)
return PCI_ERS_RESULT_DISCONNECT;
@ -4348,6 +4352,7 @@ static void mlx4_pci_resume(struct pci_dev *pdev)
struct mlx4_dev *dev = persist->dev;
struct mlx4_priv *priv = mlx4_priv(dev);
int nvfs[MLX4_MAX_PORTS + 1] = {0, 0, 0};
struct devlink *devlink;
int total_vfs;
int err;
@ -4355,6 +4360,8 @@ static void mlx4_pci_resume(struct pci_dev *pdev)
total_vfs = dev->persist->num_vfs;
memcpy(nvfs, dev->persist->nvfs, sizeof(dev->persist->nvfs));
devlink = priv_to_devlink(priv);
devl_lock(devlink);
mutex_lock(&persist->interface_state_mutex);
if (!(persist->interface_state & MLX4_INTERFACE_STATE_UP)) {
err = mlx4_load_one(pdev, priv->pci_dev_data, total_vfs, nvfs,
@ -4373,19 +4380,23 @@ static void mlx4_pci_resume(struct pci_dev *pdev)
}
end:
mutex_unlock(&persist->interface_state_mutex);
devl_unlock(devlink);
}
static void mlx4_shutdown(struct pci_dev *pdev)
{
struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
struct mlx4_dev *dev = persist->dev;
struct devlink *devlink;
mlx4_info(persist->dev, "mlx4_shutdown was called\n");
devlink = priv_to_devlink(mlx4_priv(dev));
devl_lock(devlink);
mutex_lock(&persist->interface_state_mutex);
if (persist->interface_state & MLX4_INTERFACE_STATE_UP)
mlx4_unload_one(pdev);
mutex_unlock(&persist->interface_state_mutex);
devl_unlock(devlink);
mlx4_pci_disable_device(dev);
}
@ -4400,12 +4411,16 @@ static int __maybe_unused mlx4_suspend(struct device *dev_d)
struct pci_dev *pdev = to_pci_dev(dev_d);
struct mlx4_dev_persistent *persist = pci_get_drvdata(pdev);
struct mlx4_dev *dev = persist->dev;
struct devlink *devlink;
mlx4_err(dev, "suspend was called\n");
devlink = priv_to_devlink(mlx4_priv(dev));
devl_lock(devlink);
mutex_lock(&persist->interface_state_mutex);
if (persist->interface_state & MLX4_INTERFACE_STATE_UP)
mlx4_unload_one(pdev);
mutex_unlock(&persist->interface_state_mutex);
devl_unlock(devlink);
return 0;
}
@ -4417,6 +4432,7 @@ static int __maybe_unused mlx4_resume(struct device *dev_d)
struct mlx4_dev *dev = persist->dev;
struct mlx4_priv *priv = mlx4_priv(dev);
int nvfs[MLX4_MAX_PORTS + 1] = {0, 0, 0};
struct devlink *devlink;
int total_vfs;
int ret = 0;
@ -4424,6 +4440,8 @@ static int __maybe_unused mlx4_resume(struct device *dev_d)
total_vfs = dev->persist->num_vfs;
memcpy(nvfs, dev->persist->nvfs, sizeof(dev->persist->nvfs));
devlink = priv_to_devlink(priv);
devl_lock(devlink);
mutex_lock(&persist->interface_state_mutex);
if (!(persist->interface_state & MLX4_INTERFACE_STATE_UP)) {
ret = mlx4_load_one(pdev, priv->pci_dev_data, total_vfs,
@ -4437,6 +4455,7 @@ static int __maybe_unused mlx4_resume(struct device *dev_d)
}
}
mutex_unlock(&persist->interface_state_mutex);
devl_unlock(devlink);
return ret;
}