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mlx4_core: Allow protocol drivers to find corresponding interfaces

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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 <eli@mellanox.co.il>

[ Clean up and rename a few things.  - Roland ]

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Eli Cohen 2010-08-26 14:18:43 +00:00 committed by Roland Dreier
parent 2420b60b1d
commit 33c87f0af6
3 changed files with 42 additions and 3 deletions
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15
drivers/net/mlx4/en_main.c
View file

@ -124,6 +124,13 @@ static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
return 0; 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, static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
enum mlx4_dev_event event, int port) enum mlx4_dev_event event, int port)
{ {
@ -282,9 +289,11 @@ static void *mlx4_en_add(struct mlx4_dev *dev)
} }
static struct mlx4_interface mlx4_en_interface = { static struct mlx4_interface mlx4_en_interface = {
.add = mlx4_en_add, .add = mlx4_en_add,
.remove = mlx4_en_remove, .remove = mlx4_en_remove,
.event = mlx4_en_event, .event = mlx4_en_event,
.get_dev = mlx4_en_get_netdev,
.protocol = MLX4_PROTOCOL_EN,
}; };
static int __init mlx4_en_init(void) static int __init mlx4_en_init(void)

21
drivers/net/mlx4/intf.c
View file

@ -161,3 +161,24 @@ void mlx4_unregister_device(struct mlx4_dev *dev)
mutex_unlock(&intf_mutex); 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);

9
include/linux/mlx4/driver.h
View file

@ -44,15 +44,24 @@ enum mlx4_dev_event {
MLX4_DEV_EVENT_PORT_REINIT, MLX4_DEV_EVENT_PORT_REINIT,
}; };
enum mlx4_protocol {
MLX4_PROTOCOL_IB,
MLX4_PROTOCOL_EN,
};
struct mlx4_interface { struct mlx4_interface {
void * (*add) (struct mlx4_dev *dev); void * (*add) (struct mlx4_dev *dev);
void (*remove)(struct mlx4_dev *dev, void *context); void (*remove)(struct mlx4_dev *dev, void *context);
void (*event) (struct mlx4_dev *dev, void *context, void (*event) (struct mlx4_dev *dev, void *context,
enum mlx4_dev_event event, int port); enum mlx4_dev_event event, int port);
void * (*get_dev)(struct mlx4_dev *dev, void *context, u8 port);
struct list_head list; struct list_head list;
enum mlx4_protocol protocol;
}; };
int mlx4_register_interface(struct mlx4_interface *intf); int mlx4_register_interface(struct mlx4_interface *intf);
void mlx4_unregister_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 */ #endif /* MLX4_DRIVER_H */