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RDMA/mlx5: Refactor transport domain bookkeeping logic 

In preparation to enable loopback on a single user context move the logic
that enables/disables loopback to separate functions and group variables
under a single struct.

Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Mark Bloch 2018-09-17 13:30:47 +03:00 committed by Doug Ledford
parent 5d773ff41a
commit a560f1d9af
2 changed files with 36 additions and 19 deletions
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45
drivers/infiniband/hw/mlx5/main.c
View File

@ -1571,6 +1571,32 @@ static void deallocate_uars(struct mlx5_ib_dev *dev,
mlx5_cmd_free_uar(dev->mdev, bfregi->sys_pages[i]);
}
static int mlx5_ib_enable_lb(struct mlx5_ib_dev *dev)
{
int err = 0;
mutex_lock(&dev->lb.mutex);
dev->lb.user_td++;
if (dev->lb.user_td == 2)
err = mlx5_nic_vport_update_local_lb(dev->mdev, true);
mutex_unlock(&dev->lb.mutex);
return err;
}
static void mlx5_ib_disable_lb(struct mlx5_ib_dev *dev)
{
mutex_lock(&dev->lb.mutex);
dev->lb.user_td--;
if (dev->lb.user_td < 2)
mlx5_nic_vport_update_local_lb(dev->mdev, false);
mutex_unlock(&dev->lb.mutex);
}
static int mlx5_ib_alloc_transport_domain(struct mlx5_ib_dev *dev, u32 *tdn)
{
int err;
@ -1587,14 +1613,7 @@ static int mlx5_ib_alloc_transport_domain(struct mlx5_ib_dev *dev, u32 *tdn)
!MLX5_CAP_GEN(dev->mdev, disable_local_lb_mc)))
return err;
mutex_lock(&dev->lb_mutex);
dev->user_td++;
if (dev->user_td == 2)
err = mlx5_nic_vport_update_local_lb(dev->mdev, true);
mutex_unlock(&dev->lb_mutex);
return err;
return mlx5_ib_enable_lb(dev);
}
static void mlx5_ib_dealloc_transport_domain(struct mlx5_ib_dev *dev, u32 tdn)
@ -1609,13 +1628,7 @@ static void mlx5_ib_dealloc_transport_domain(struct mlx5_ib_dev *dev, u32 tdn)
!MLX5_CAP_GEN(dev->mdev, disable_local_lb_mc)))
return;
mutex_lock(&dev->lb_mutex);
dev->user_td--;
if (dev->user_td < 2)
mlx5_nic_vport_update_local_lb(dev->mdev, false);
mutex_unlock(&dev->lb_mutex);
mlx5_ib_disable_lb(dev);
}
static struct ib_ucontext *mlx5_ib_alloc_ucontext(struct ib_device *ibdev,
@ -5880,7 +5893,7 @@ int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev)
if ((MLX5_CAP_GEN(dev->mdev, port_type) == MLX5_CAP_PORT_TYPE_ETH) &&
(MLX5_CAP_GEN(dev->mdev, disable_local_lb_uc) ||
MLX5_CAP_GEN(dev->mdev, disable_local_lb_mc)))
mutex_init(&dev->lb_mutex);
mutex_init(&dev->lb.mutex);
return 0;
}

10
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@ -858,6 +858,12 @@ to_mcounters(struct ib_counters *ibcntrs)
return container_of(ibcntrs, struct mlx5_ib_mcounters, ibcntrs);
}
struct mlx5_ib_lb_state {
/* protect the user_td */
struct mutex mutex;
u32 user_td;
};
struct mlx5_ib_dev {
struct ib_device ib_dev;
const struct uverbs_object_tree_def *driver_trees[6];
@ -899,9 +905,7 @@ struct mlx5_ib_dev {
const struct mlx5_ib_profile *profile;
struct mlx5_eswitch_rep *rep;
/* protect the user_td */
struct mutex lb_mutex;
u32 user_td;
struct mlx5_ib_lb_state lb;
u8 umr_fence;
struct list_head ib_dev_list;
u64 sys_image_guid;