From 33c87f0af60146b375220809c1cb745ac1a86edf Mon Sep 17 00:00:00 2001 From: Eli Cohen Date: Thu, 26 Aug 2010 14:18:43 +0000 Subject: [PATCH] mlx4_core: Allow protocol drivers to find corresponding interfaces Add a mechanism for mlx4 protocol drivers to get a pointer to other drivers's device objects. For this, an exported function, mlx4_get_protocol_dev() is added, which allows a driver to get some other driver's device based on the protocol that the driver implements. Two protocols are added: MLX4_PROTOCOL_IB and MLX4_PROTOCOL_EN. This will be used in mlx4 IBoE support so that mlx4_ib can find the corresponding mlx4_en netdev. Signed-off-by: Eli Cohen [ Clean up and rename a few things. - Roland ] Signed-off-by: Roland Dreier --- drivers/net/mlx4/en_main.c | 15 ++++++++++++--- drivers/net/mlx4/intf.c | 21 +++++++++++++++++++++ include/linux/mlx4/driver.h | 9 +++++++++ 3 files changed, 42 insertions(+), 3 deletions(-) diff --git a/drivers/net/mlx4/en_main.c b/drivers/net/mlx4/en_main.c index 97934f1ec53a..b2df3eeb1598 100644 --- a/drivers/net/mlx4/en_main.c +++ b/drivers/net/mlx4/en_main.c @@ -124,6 +124,13 @@ static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) return 0; } +static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) +{ + struct mlx4_en_dev *endev = ctx; + + return endev->pndev[port]; +} + static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, enum mlx4_dev_event event, int port) { @@ -282,9 +289,11 @@ err_free_res: } static struct mlx4_interface mlx4_en_interface = { - .add = mlx4_en_add, - .remove = mlx4_en_remove, - .event = mlx4_en_event, + .add = mlx4_en_add, + .remove = mlx4_en_remove, + .event = mlx4_en_event, + .get_dev = mlx4_en_get_netdev, + .protocol = MLX4_PROTOCOL_EN, }; static int __init mlx4_en_init(void) diff --git a/drivers/net/mlx4/intf.c b/drivers/net/mlx4/intf.c index 555067802751..73c94fcdfddf 100644 --- a/drivers/net/mlx4/intf.c +++ b/drivers/net/mlx4/intf.c @@ -161,3 +161,24 @@ void mlx4_unregister_device(struct mlx4_dev *dev) mutex_unlock(&intf_mutex); } + +void *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port) +{ + struct mlx4_priv *priv = mlx4_priv(dev); + struct mlx4_device_context *dev_ctx; + unsigned long flags; + void *result = NULL; + + spin_lock_irqsave(&priv->ctx_lock, flags); + + list_for_each_entry(dev_ctx, &priv->ctx_list, list) + if (dev_ctx->intf->protocol == proto && dev_ctx->intf->get_dev) { + result = dev_ctx->intf->get_dev(dev, dev_ctx->context, port); + break; + } + + spin_unlock_irqrestore(&priv->ctx_lock, flags); + + return result; +} +EXPORT_SYMBOL_GPL(mlx4_get_protocol_dev); diff --git a/include/linux/mlx4/driver.h b/include/linux/mlx4/driver.h index 53c5fdb6eac4..f407cd4bfb34 100644 --- a/include/linux/mlx4/driver.h +++ b/include/linux/mlx4/driver.h @@ -44,15 +44,24 @@ enum mlx4_dev_event { MLX4_DEV_EVENT_PORT_REINIT, }; +enum mlx4_protocol { + MLX4_PROTOCOL_IB, + MLX4_PROTOCOL_EN, +}; + struct mlx4_interface { void * (*add) (struct mlx4_dev *dev); void (*remove)(struct mlx4_dev *dev, void *context); void (*event) (struct mlx4_dev *dev, void *context, enum mlx4_dev_event event, int port); + void * (*get_dev)(struct mlx4_dev *dev, void *context, u8 port); struct list_head list; + enum mlx4_protocol protocol; }; int mlx4_register_interface(struct mlx4_interface *intf); void mlx4_unregister_interface(struct mlx4_interface *intf); +void *mlx4_get_protocol_dev(struct mlx4_dev *dev, enum mlx4_protocol proto, int port); + #endif /* MLX4_DRIVER_H */ -- 2.20.1