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IB/mlx5: Add sniffer support to steering

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Add support to create sniffer rule. This rule receive all
incoming and outgoing packets from the port.
A user could create such rule by using IB_FLOW_ATTR_SNIFFER type.

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Maor Gottlieb 2016-08-28 14:16:34 +03:00 committed by Doug Ledford
parent d9d4980af2
commit cc0e5d4235
2 changed files with 74 additions and 2 deletions
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74
drivers/infiniband/hw/mlx5/main.c
View File

@ -1649,6 +1649,7 @@ static int mlx5_ib_destroy_flow(struct ib_flow *flow_id)
list_for_each_entry_safe(iter, tmp, &handler->list, list) {
mlx5_del_flow_rule(iter->rule);
put_flow_table(dev, iter->prio, true);
list_del(&iter->list);
kfree(iter);
}
@ -1670,10 +1671,16 @@ static int ib_prio_to_core_prio(unsigned int priority, bool dont_trap)
return priority;
}
enum flow_table_type {
MLX5_IB_FT_RX,
MLX5_IB_FT_TX
};
#define MLX5_FS_MAX_TYPES 10
#define MLX5_FS_MAX_ENTRIES 32000UL
static struct mlx5_ib_flow_prio *get_flow_table(struct mlx5_ib_dev *dev,
struct ib_flow_attr *flow_attr)
struct ib_flow_attr *flow_attr,
enum flow_table_type ft_type)
{
bool dont_trap = flow_attr->flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP;
struct mlx5_flow_namespace *ns = NULL;
@ -1704,6 +1711,19 @@ static struct mlx5_ib_flow_prio *get_flow_table(struct mlx5_ib_dev *dev,
&num_entries,
&num_groups);
prio = &dev->flow_db.prios[MLX5_IB_FLOW_LEFTOVERS_PRIO];
} else if (flow_attr->type == IB_FLOW_ATTR_SNIFFER) {
if (!MLX5_CAP_FLOWTABLE(dev->mdev,
allow_sniffer_and_nic_rx_shared_tir))
return ERR_PTR(-ENOTSUPP);
ns = mlx5_get_flow_namespace(dev->mdev, ft_type == MLX5_IB_FT_RX ?
MLX5_FLOW_NAMESPACE_SNIFFER_RX :
MLX5_FLOW_NAMESPACE_SNIFFER_TX);
prio = &dev->flow_db.sniffer[ft_type];
priority = 0;
num_entries = 1;
num_groups = 1;
}
if (!ns)
@ -1875,6 +1895,43 @@ static struct mlx5_ib_flow_handler *create_leftovers_rule(struct mlx5_ib_dev *de
return handler;
}
static struct mlx5_ib_flow_handler *create_sniffer_rule(struct mlx5_ib_dev *dev,
struct mlx5_ib_flow_prio *ft_rx,
struct mlx5_ib_flow_prio *ft_tx,
struct mlx5_flow_destination *dst)
{
struct mlx5_ib_flow_handler *handler_rx;
struct mlx5_ib_flow_handler *handler_tx;
int err;
static const struct ib_flow_attr flow_attr = {
.num_of_specs = 0,
.size = sizeof(flow_attr)
};
handler_rx = create_flow_rule(dev, ft_rx, &flow_attr, dst);
if (IS_ERR(handler_rx)) {
err = PTR_ERR(handler_rx);
goto err;
}
handler_tx = create_flow_rule(dev, ft_tx, &flow_attr, dst);
if (IS_ERR(handler_tx)) {
err = PTR_ERR(handler_tx);
goto err_tx;
}
list_add(&handler_tx->list, &handler_rx->list);
return handler_rx;
err_tx:
mlx5_del_flow_rule(handler_rx->rule);
ft_rx->refcount--;
kfree(handler_rx);
err:
return ERR_PTR(err);
}
static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp,
struct ib_flow_attr *flow_attr,
int domain)
@ -1882,6 +1939,7 @@ static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp,
struct mlx5_ib_dev *dev = to_mdev(qp->device);
struct mlx5_ib_flow_handler *handler = NULL;
struct mlx5_flow_destination *dst = NULL;
struct mlx5_ib_flow_prio *ft_prio_tx = NULL;
struct mlx5_ib_flow_prio *ft_prio;
int err;
@ -1899,11 +1957,19 @@ static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp,
mutex_lock(&dev->flow_db.lock);
ft_prio = get_flow_table(dev, flow_attr);
ft_prio = get_flow_table(dev, flow_attr, MLX5_IB_FT_RX);
if (IS_ERR(ft_prio)) {
err = PTR_ERR(ft_prio);
goto unlock;
}
if (flow_attr->type == IB_FLOW_ATTR_SNIFFER) {
ft_prio_tx = get_flow_table(dev, flow_attr, MLX5_IB_FT_TX);
if (IS_ERR(ft_prio_tx)) {
err = PTR_ERR(ft_prio_tx);
ft_prio_tx = NULL;
goto destroy_ft;
}
}
dst->type = MLX5_FLOW_DESTINATION_TYPE_TIR;
dst->tir_num = to_mqp(qp)->raw_packet_qp.rq.tirn;
@ -1920,6 +1986,8 @@ static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp,
flow_attr->type == IB_FLOW_ATTR_MC_DEFAULT) {
handler = create_leftovers_rule(dev, ft_prio, flow_attr,
dst);
} else if (flow_attr->type == IB_FLOW_ATTR_SNIFFER) {
handler = create_sniffer_rule(dev, ft_prio, ft_prio_tx, dst);
} else {
err = -EINVAL;
goto destroy_ft;
@ -1938,6 +2006,8 @@ static struct ib_flow *mlx5_ib_create_flow(struct ib_qp *qp,
destroy_ft:
put_flow_table(dev, ft_prio, false);
if (ft_prio_tx)
put_flow_table(dev, ft_prio_tx, false);
unlock:
mutex_unlock(&dev->flow_db.lock);
kfree(dst);

2
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@ -142,6 +142,7 @@ struct mlx5_ib_pd {
#define MLX5_IB_FLOW_LEFTOVERS_PRIO (MLX5_IB_FLOW_MCAST_PRIO + 1)
#define MLX5_IB_NUM_FLOW_FT (MLX5_IB_FLOW_LEFTOVERS_PRIO + 1)
#define MLX5_IB_NUM_SNIFFER_FTS 2
struct mlx5_ib_flow_prio {
struct mlx5_flow_table *flow_table;
unsigned int refcount;
@ -156,6 +157,7 @@ struct mlx5_ib_flow_handler {
struct mlx5_ib_flow_db {
struct mlx5_ib_flow_prio prios[MLX5_IB_NUM_FLOW_FT];
struct mlx5_ib_flow_prio sniffer[MLX5_IB_NUM_SNIFFER_FTS];
/* Protect flow steering bypass flow tables
* when add/del flow rules.
* only single add/removal of flow steering rule could be done