Subject: [PATCH mlx5-next 09/11] net/mlx5: Delete custom device management logic

From: Leon Romanovsky <[email-masked]>
Date: Mon, 26 Oct 2020 13:18:47 +0200

From: Leon Romanovsky <[email-masked]>

After conversion to use auxiliary bus, all custom device management is
not needed anymore, delete it.

Signed-off-by: Leon Romanovsky <[email-masked]>
---
 drivers/net/ethernet/mellanox/mlx5/core/dev.c | 299 +-----------------
 drivers/net/ethernet/mellanox/mlx5/core/lag.c |  18 --
 .../net/ethernet/mellanox/mlx5/core/main.c    |   4 -
 .../ethernet/mellanox/mlx5/core/mlx5_core.h   |  10 -
 include/linux/mlx5/driver.h                   |  22 --
 5 files changed, 17 insertions(+), 336 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/dev.c b/drivers/net/ethernet/mellanox/mlx5/core/dev.c
index 466e4a35a0c5..81803bc75066 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/dev.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/dev.c
@@ -35,24 +35,10 @@
 #include <linux/mlx5/mlx5_ifc_vdpa.h>
 #include "mlx5_core.h"

-static LIST_HEAD(intf_list);
-static LIST_HEAD(mlx5_dev_list);
 /* intf dev list mutex */
 static DEFINE_MUTEX(mlx5_intf_mutex);
 static DEFINE_IDA(mlx5_adev_ida);

-struct mlx5_device_context {
-	struct list_head	list;
-	struct mlx5_interface  *intf;
-	void		       *context;
-	unsigned long		state;
-};
-
-enum {
-	MLX5_INTERFACE_ADDED,
-	MLX5_INTERFACE_ATTACHED,
-};
-
 static bool is_eth_rep_supported(struct mlx5_core_dev *dev)
 {
 	if (!IS_ENABLED(CONFIG_MLX5_ESWITCH))
@@ -204,6 +190,17 @@ static bool is_ib_supported(struct mlx5_core_dev *dev)
 	return true;
 }

+enum {
+	MLX5_INTERFACE_PROTOCOL_ETH_REP,
+	MLX5_INTERFACE_PROTOCOL_ETH,
+
+	MLX5_INTERFACE_PROTOCOL_IB_REP,
+	MLX5_INTERFACE_PROTOCOL_MPIB,
+	MLX5_INTERFACE_PROTOCOL_IB,
+
+	MLX5_INTERFACE_PROTOCOL_VDPA,
+};
+
 static const struct mlx5_adev_device {
 	const char *suffix;
 	bool (*is_supported)(struct mlx5_core_dev *dev);
@@ -248,148 +245,6 @@ void mlx5_adev_cleanup(struct mlx5_core_dev *dev)
 	kfree(priv->adev);
 }

-void mlx5_add_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);
-
-	if (!mlx5_lag_intf_add(intf, priv))
-		return;
-
-	dev_ctx = kzalloc(sizeof(*dev_ctx), GFP_KERNEL);
-	if (!dev_ctx)
-		return;
-
-	dev_ctx->intf = intf;
-
-	dev_ctx->context = intf->add(dev);
-	if (dev_ctx->context) {
-		set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
-		if (intf->attach)
-			set_bit(MLX5_INTERFACE_ATTACHED, &dev_ctx->state);
-
-		spin_lock_irq(&priv->ctx_lock);
-		list_add_tail(&dev_ctx->list, &priv->ctx_list);
-		spin_unlock_irq(&priv->ctx_lock);
-	}
-
-	if (!dev_ctx->context)
-		kfree(dev_ctx);
-}
-
-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;
-}
-
-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);
-
-	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);
-
-	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;
-		if (intf->attach(dev, dev_ctx->context))
-			return;
-		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);
-		if (!dev_ctx->context)
-			return;
-		set_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state);
-	}
-}
-
-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);
-	}
-}
-
-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);
-}
-
-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 void adev_release(struct device *dev)
 {
 	struct mlx5_adev *mlx5_adev =
@@ -442,8 +297,6 @@ static void del_adev(struct auxiliary_device *adev)

 int mlx5_register_device(struct mlx5_core_dev *dev)
 {
-	struct mlx5_priv *priv = &dev->priv;
-	struct mlx5_interface *intf;
 	int ret;

 	mutex_lock(&mlx5_intf_mutex);
@@ -451,65 +304,19 @@ int mlx5_register_device(struct mlx5_core_dev *dev)
 	ret = _mlx5_rescan_drivers(dev);
 	mutex_unlock(&mlx5_intf_mutex);
 	if (ret)
-		goto add_err;
-
-	mutex_lock(&mlx5_intf_mutex);
-	list_add_tail(&priv->dev_list, &mlx5_dev_list);
-	list_for_each_entry(intf, &intf_list, list)
-		mlx5_add_device(intf, priv);
-	mutex_unlock(&mlx5_intf_mutex);
-
-	return 0;
+		mlx5_unregister_device(dev);

-add_err:
-	mlx5_unregister_device(dev);
 	return ret;
 }

 void mlx5_unregister_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_reverse(intf, &intf_list, list)
-		mlx5_remove_device(intf, priv);
-	list_del(&priv->dev_list);
-
 	dev->priv.flags |= MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
 	_mlx5_rescan_drivers(dev);
 	mutex_unlock(&mlx5_intf_mutex);
 }

-int mlx5_register_interface(struct mlx5_interface *intf)
-{
-	struct mlx5_priv *priv;
-
-	if (!intf->add || !intf->remove)
-		return -EINVAL;
-
-	mutex_lock(&mlx5_intf_mutex);
-	list_add_tail(&intf->list, &intf_list);
-	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
-		mlx5_add_device(intf, priv);
-	mutex_unlock(&mlx5_intf_mutex);
-
-	return 0;
-}
-EXPORT_SYMBOL(mlx5_register_interface);
-
-void mlx5_unregister_interface(struct mlx5_interface *intf)
-{
-	struct mlx5_priv *priv;
-
-	mutex_lock(&mlx5_intf_mutex);
-	list_for_each_entry(priv, &mlx5_dev_list, dev_list)
-		mlx5_remove_device(intf, priv);
-	list_del(&intf->list);
-	mutex_unlock(&mlx5_intf_mutex);
-}
-EXPORT_SYMBOL(mlx5_unregister_interface);
-
 /* This function is used after mlx5_core_dev is reconfigured.
  */
 int _mlx5_rescan_drivers(struct mlx5_core_dev *dev)
@@ -567,59 +374,6 @@ int _mlx5_rescan_drivers(struct mlx5_core_dev *dev)
 	return ret;
 }

-/* Must be called with intf_mutex held */
-static bool mlx5_has_added_dev_by_protocol(struct mlx5_core_dev *mdev, int protocol)
-{
-	struct mlx5_device_context *dev_ctx;
-	struct mlx5_interface *intf;
-	bool found = false;
-
-	list_for_each_entry(intf, &intf_list, list) {
-		if (intf->protocol == protocol) {
-			dev_ctx = mlx5_get_device(intf, &mdev->priv);
-			if (dev_ctx && test_bit(MLX5_INTERFACE_ADDED, &dev_ctx->state))
-				found = true;
-			break;
-		}
-	}
-
-	return found;
-}
-
-void mlx5_reload_interface(struct mlx5_core_dev *mdev, int protocol)
-{
-	mutex_lock(&mlx5_intf_mutex);
-	if (mlx5_has_added_dev_by_protocol(mdev, protocol)) {
-		mlx5_remove_dev_by_protocol(mdev, protocol);
-		mlx5_add_dev_by_protocol(mdev, protocol);
-	}
-	mutex_unlock(&mlx5_intf_mutex);
-}
-
-/* Must be called with intf_mutex held */
-void mlx5_add_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
-{
-	struct mlx5_interface *intf;
-
-	list_for_each_entry(intf, &intf_list, list)
-		if (intf->protocol == protocol) {
-			mlx5_add_device(intf, &dev->priv);
-			break;
-		}
-}
-
-/* Must be called with intf_mutex held */
-void mlx5_remove_dev_by_protocol(struct mlx5_core_dev *dev, int protocol)
-{
-	struct mlx5_interface *intf;
-
-	list_for_each_entry(intf, &intf_list, list)
-		if (intf->protocol == protocol) {
-			mlx5_remove_device(intf, &dev->priv);
-			break;
-		}
-}
-
 static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev)
 {
 	return (u32)((pci_domain_nr(dev->pdev->bus) << 16) |
@@ -651,44 +405,25 @@ static int next_phys_dev(struct device *dev, const void *data)
  */
 struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev)
 {
-	struct mlx5_core_dev *res = NULL;
-	struct mlx5_core_dev *tmp_dev;
 	struct auxiliary_device *adev;
 	struct mlx5_adev *madev;
-	struct mlx5_priv *priv;
-	u32 pci_id;

 	if (!mlx5_core_is_pf(dev))
 		return NULL;

 	adev = auxiliary_find_device(NULL, dev, &next_phys_dev);
-	if (adev) {
-		madev = container_of(adev, struct mlx5_adev, adev);
-
-		put_device(&adev->dev);
-		return madev->mdev;
-	}
-
-	pci_id = mlx5_gen_pci_id(dev);
-	list_for_each_entry(priv, &mlx5_dev_list, dev_list) {
-		tmp_dev = container_of(priv, struct mlx5_core_dev, priv);
-		if (!mlx5_core_is_pf(tmp_dev))
-			continue;
-
-		if ((dev != tmp_dev) && (mlx5_gen_pci_id(tmp_dev) == pci_id)) {
-			res = tmp_dev;
-			break;
-		}
-	}
+	if (!adev)
+		return NULL;

-	return res;
+	madev = container_of(adev, struct mlx5_adev, adev);
+	put_device(&adev->dev);
+	return madev->mdev;
 }

 void mlx5_dev_list_lock(void)
 {
 	mutex_lock(&mlx5_intf_mutex);
 }
-
 void mlx5_dev_list_unlock(void)
 {
 	mutex_unlock(&mlx5_intf_mutex);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag.c
index 7bc7f5e3dcbc..7edfd724e77f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag.c
@@ -749,24 +749,6 @@ u8 mlx5_lag_get_slave_port(struct mlx5_core_dev *dev,
 }
 EXPORT_SYMBOL(mlx5_lag_get_slave_port);

-bool mlx5_lag_intf_add(struct mlx5_interface *intf, struct mlx5_priv *priv)
-{
-	struct mlx5_core_dev *dev = container_of(priv, struct mlx5_core_dev,
-						 priv);
-	struct mlx5_lag *ldev;
-
-	if (intf->protocol != MLX5_INTERFACE_PROTOCOL_IB)
-		return true;
-
-	ldev = mlx5_lag_dev_get(dev);
-	if (!ldev || !__mlx5_lag_is_roce(ldev) ||
-	    ldev->pf[MLX5_LAG_P1].dev == dev)
-		return true;
-
-	/* If bonded, we do not add an IB device for PF1. */
-	return false;
-}
-
 int mlx5_lag_query_cong_counters(struct mlx5_core_dev *dev,
 				 u64 *values,
 				 int num_counters,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index a6034acb2ac3..3effabb6a3b1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -1225,8 +1225,6 @@ int mlx5_load_one(struct mlx5_core_dev *dev, bool boot)
 		err = mlx5_register_device(dev);
 		if (err)
 			goto err_register;
-	} else {
-		mlx5_attach_device(dev);
 	}

 	mutex_unlock(&dev->intf_state_mutex);
@@ -1256,8 +1254,6 @@ void mlx5_unload_one(struct mlx5_core_dev *dev, bool cleanup)
 	if (cleanup) {
 		mlx5_unregister_device(dev);
 		mlx5_devlink_unregister(priv_to_devlink(dev));
-	} else {
-		mlx5_detach_device(dev);
 	}

 	if (!test_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state)) {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
index 4639fbfbd8ff..c6e358d177a7 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
@@ -178,22 +178,13 @@ void mlx5_events_cleanup(struct mlx5_core_dev *dev);
 void mlx5_events_start(struct mlx5_core_dev *dev);
 void mlx5_events_stop(struct mlx5_core_dev *dev);

-void mlx5_add_device(struct mlx5_interface *intf, struct mlx5_priv *priv);
-void mlx5_remove_device(struct mlx5_interface *intf, struct mlx5_priv *priv);
-void mlx5_attach_device(struct mlx5_core_dev *dev);
-void mlx5_detach_device(struct mlx5_core_dev *dev);
-bool mlx5_device_registered(struct mlx5_core_dev *dev);
 int mlx5_register_device(struct mlx5_core_dev *dev);
 void mlx5_unregister_device(struct mlx5_core_dev *dev);
-void mlx5_add_dev_by_protocol(struct mlx5_core_dev *dev, int protocol);
-void mlx5_remove_dev_by_protocol(struct mlx5_core_dev *dev, int protocol);
 struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev);
 void mlx5_dev_list_lock(void);
 void mlx5_dev_list_unlock(void);
 int mlx5_dev_list_trylock(void);

-bool mlx5_lag_intf_add(struct mlx5_interface *intf, struct mlx5_priv *priv);
-
 int mlx5_query_mtpps(struct mlx5_core_dev *dev, u32 *mtpps, u32 mtpps_size);
 int mlx5_set_mtpps(struct mlx5_core_dev *mdev, u32 *mtpps, u32 mtpps_size);
 int mlx5_query_mtppse(struct mlx5_core_dev *mdev, u8 pin, u8 *arm, u8 *mode);
@@ -243,7 +234,6 @@ static inline int mlx5_rescan_drivers(struct mlx5_core_dev *dev)
 	return ret;
 }

-void mlx5_reload_interface(struct mlx5_core_dev *mdev, int protocol);
 void mlx5_lag_update(struct mlx5_core_dev *dev);

 enum {
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index b113023d242e..8808ba1bfbd1 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -1079,28 +1079,6 @@ enum {
 	MAX_MR_CACHE_ENTRIES
 };

-enum {
-	MLX5_INTERFACE_PROTOCOL_ETH_REP,
-	MLX5_INTERFACE_PROTOCOL_ETH,
-
-	MLX5_INTERFACE_PROTOCOL_IB_REP,
-	MLX5_INTERFACE_PROTOCOL_MPIB,
-	MLX5_INTERFACE_PROTOCOL_IB,
-
-	MLX5_INTERFACE_PROTOCOL_VDPA,
-};
-
-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);
-	int			protocol;
-	struct list_head	list;
-};
-
-int mlx5_register_interface(struct mlx5_interface *intf);
-void mlx5_unregister_interface(struct mlx5_interface *intf);
 int mlx5_notifier_register(struct mlx5_core_dev *dev, struct notifier_block *nb);
 int mlx5_notifier_unregister(struct mlx5_core_dev *dev, struct notifier_block *nb);
 int mlx5_eq_notifier_register(struct mlx5_core_dev *dev, struct mlx5_nb *nb);
--
2.26.2