From 60d7ceea4b2a2f7106f61a0bb712a71868875106 Mon Sep 17 00:00:00 2001 From: Moshe Shemesh Date: Thu, 28 Jul 2022 18:53:48 +0300 Subject: [PATCH] net/mlx4: Lock mlx4 devlink reload callback 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 Reviewed-by: Tariq Toukan Reviewed-by: Jiri Pirko Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/mellanox/mlx4/catas.c | 5 ++++ drivers/net/ethernet/mellanox/mlx4/main.c | 45 +++++++++++++++++++++--------- 2 files changed, 37 insertions(+), 13 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/catas.c b/drivers/net/ethernet/mellanox/mlx4/catas.c index 5b11557..0eb7b83 100644 --- a/drivers/net/ethernet/mellanox/mlx4/catas.c +++ b/drivers/net/ethernet/mellanox/mlx4/catas.c @@ -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) diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 0166d00..2c764d1 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -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; } -- 2.7.4