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-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/main.c149
-rw-r--r--include/linux/mlx5/driver.h2
2 files changed, 131 insertions, 20 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index baba53f..108d8f2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -81,6 +81,7 @@ struct mlx5_device_context {
struct list_head list;
struct mlx5_interface *intf;
void *context;
+ unsigned long state;
};
enum {
@@ -778,6 +779,11 @@ static int mlx5_core_set_issi(struct mlx5_core_dev *dev)
return -ENOTSUPP;
}
+enum {
+ MLX5_INTERFACE_ADDED,
+ MLX5_INTERFACE_ATTACHED,
+};
+
static void mlx5_add_device(struct mlx5_interface *intf, struct mlx5_priv *priv)
{
struct mlx5_device_context *dev_ctx;
@@ -786,12 +792,15 @@ static void mlx5_add_device(struct mlx5_interface *intf, struct mlx5_priv *priv)
if (!mlx5_lag_intf_add(intf, priv))
return;
- dev_ctx = kmalloc(sizeof(*dev_ctx), GFP_KERNEL);
+ dev_ctx = kzalloc(sizeof(*dev_ctx), GFP_KERNEL);
if (!dev_ctx)
return;
- dev_ctx->intf = intf;
+ dev_ctx->intf = intf;
dev_ctx->context = intf->add(dev);
+ set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
+ if (intf->attach)
+ set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
if (dev_ctx->context) {
spin_lock_irq(&priv->ctx_lock);
@@ -802,21 +811,114 @@ static void mlx5_add_device(struct mlx5_interface *intf, struct mlx5_priv *priv)
}
}
+static struct mlx5_device_context *mlx5_get_device(struct mlx5_interface *intf,
+ struct mlx5_priv *priv)
+{
+ struct mlx5_device_context *dev_ctx;
+
+ list_for_each_entry(dev_ctx, &priv->ctx_list, list)
+ if (dev_ctx->intf == intf)
+ return dev_ctx;
+ return NULL;
+}
+
static void mlx5_remove_device(struct mlx5_interface *intf, struct mlx5_priv *priv)
{
struct mlx5_device_context *dev_ctx;
struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
- list_for_each_entry(dev_ctx, &priv->ctx_list, list)
- if (dev_ctx->intf == intf) {
- spin_lock_irq(&priv->ctx_lock);
- list_del(&dev_ctx->list);
- spin_unlock_irq(&priv->ctx_lock);
+ dev_ctx = mlx5_get_device(intf, priv);
+ if (!dev_ctx)
+ return;
+
+ spin_lock_irq(&priv->ctx_lock);
+ list_del(&dev_ctx->list);
+ spin_unlock_irq(&priv->ctx_lock);
+
+ if (test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
+ intf->remove(dev, dev_ctx->context);
- intf->remove(dev, dev_ctx->context);
- kfree(dev_ctx);
+ kfree(dev_ctx);
+}
+
+static void mlx5_attach_interface(struct mlx5_interface *intf, struct mlx5_priv *priv)
+{
+ struct mlx5_device_context *dev_ctx;
+ struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
+
+ dev_ctx = mlx5_get_device(intf, priv);
+ if (!dev_ctx)
+ return;
+
+ if (intf->attach) {
+ if (test_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state))
return;
- }
+ intf->attach(dev, dev_ctx->context);
+ set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
+ } else {
+ if (test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
+ return;
+ dev_ctx->context = intf->add(dev);
+ set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
+ }
+}
+
+static void mlx5_attach_device(struct mlx5_core_dev *dev)
+{
+ struct mlx5_priv *priv = &dev->priv;
+ struct mlx5_interface *intf;
+
+ mutex_lock(&mlx5_intf_mutex);
+ list_for_each_entry(intf, &intf_list, list)
+ mlx5_attach_interface(intf, priv);
+ mutex_unlock(&mlx5_intf_mutex);
+}
+
+static void mlx5_detach_interface(struct mlx5_interface *intf, struct mlx5_priv *priv)
+{
+ struct mlx5_device_context *dev_ctx;
+ struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev, priv);
+
+ dev_ctx = mlx5_get_device(intf, priv);
+ if (!dev_ctx)
+ return;
+
+ if (intf->detach) {
+ if (!test_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state))
+ return;
+ intf->detach(dev, dev_ctx->context);
+ clear_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
+ } else {
+ if (!test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
+ return;
+ intf->remove(dev, dev_ctx->context);
+ clear_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
+ }
+}
+
+static void mlx5_detach_device(struct mlx5_core_dev *dev)
+{
+ struct mlx5_priv *priv = &dev->priv;
+ struct mlx5_interface *intf;
+
+ mutex_lock(&mlx5_intf_mutex);
+ list_for_each_entry(intf, &intf_list, list)
+ mlx5_detach_interface(intf, priv);
+ mutex_unlock(&mlx5_intf_mutex);
+}
+
+static bool mlx5_device_registered(struct mlx5_core_dev *dev)
+{
+ struct mlx5_priv *priv;
+ bool found = false;
+
+ mutex_lock(&mlx5_intf_mutex);
+ list_for_each_entry(priv, &mlx5_dev_list, dev_list)
+ if (priv == &dev->priv)
+ found = true;
+ mutex_unlock(&mlx5_intf_mutex);
+
+ return found;
}
static int mlx5_register_device(struct mlx5_core_dev *dev)
@@ -1162,16 +1264,16 @@ static int mlx5_load_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv)
goto err_sriov;
}
- err = mlx5_register_device(dev);
- if (err) {
- dev_err(&pdev->dev, "mlx5_register_device failed %d\n", err);
- goto err_reg_dev;
+ if (mlx5_device_registered(dev)) {
+ mlx5_attach_device(dev);
+ } else {
+ err = mlx5_register_device(dev);
+ if (err) {
+ dev_err(&pdev->dev, "mlx5_register_device failed %d\n", err);
+ goto err_reg_dev;
+ }
}
- err = request_module_nowait(MLX5_IB_MOD);
- if (err)
- pr_info("failed request module on %s\n", MLX5_IB_MOD);
-
clear_bit(MLX5_INTERFACE_STATE_DOWN, &dev->intf_state);
set_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state);
out:
@@ -1247,12 +1349,13 @@ static int mlx5_unload_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv)
goto out;
}
+ if (mlx5_device_registered(dev))
+ mlx5_detach_device(dev);
+
mlx5_sriov_cleanup(dev);
- mlx5_unregister_device(dev);
#ifdef CONFIG_MLX5_CORE_EN
mlx5_eswitch_cleanup(dev->priv.eswitch);
#endif
-
mlx5_cleanup_rl_table(dev);
mlx5_cleanup_fs(dev);
mlx5_cleanup_mkey_table(dev);
@@ -1364,6 +1467,9 @@ static int init_one(struct pci_dev *pdev,
dev_err(&pdev->dev, "mlx5_load_one failed with error code %d\n", err);
goto clean_health;
}
+ err = request_module_nowait(MLX5_IB_MOD);
+ if (err)
+ pr_info("failed request module on %s\n", MLX5_IB_MOD);
err = devlink_register(devlink, &pdev->dev);
if (err)
@@ -1391,11 +1497,14 @@ static void remove_one(struct pci_dev *pdev)
struct mlx5_priv *priv = &dev->priv;
devlink_unregister(devlink);
+ mlx5_unregister_device(dev);
+
if (mlx5_unload_one(dev, priv)) {
dev_err(&dev->pdev->dev, "mlx5_unload_one failed\n");
mlx5_health_cleanup(dev);
return;
}
+
mlx5_health_cleanup(dev);
mlx5_pci_close(dev, priv);
pci_set_drvdata(pdev, NULL);
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 0d7aedf..85c4786 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -930,6 +930,8 @@ enum {
struct mlx5_interface {
void * (*add)(struct mlx5_core_dev *dev);
void (*remove)(struct mlx5_core_dev *dev, void *context);
+ int (*attach)(struct mlx5_core_dev *dev, void *context);
+ void (*detach)(struct mlx5_core_dev *dev, void *context);
void (*event)(struct mlx5_core_dev *dev, void *context,
enum mlx5_dev_event event, unsigned long param);
void * (*get_dev)(void *context);
generated by cgit v0.10.2 at 2024-07-30 04:08:12 (GMT)