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net/mlx5: Refactor creating fast path prio chains

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Next patch will re-use this to add a new chain but in a
different prio.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Paul Blakey 2019-11-12 00:34:28 +01:00 committed by Saeed Mahameed
parent 34b13cb3ea
commit 439e843f1f
1 changed files with 82 additions and 36 deletions
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118
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
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@ -2558,60 +2558,106 @@ static int init_rdma_rx_root_ns(struct mlx5_flow_steering *steering)
steering->rdma_rx_root_ns = NULL;
return err;
}
static int init_fdb_root_ns(struct mlx5_flow_steering *steering)
/* FT and tc chains are stored in the same array so we can re-use the
* mlx5_get_fdb_sub_ns() and tc api for FT chains.
* When creating a new ns for each chain store it in the first available slot.
* Assume tc chains are created and stored first and only then the FT chain.
*/
static void store_fdb_sub_ns_prio_chain(struct mlx5_flow_steering *steering,
struct mlx5_flow_namespace *ns)
{
int chain = 0;
while (steering->fdb_sub_ns[chain])
++chain;
steering->fdb_sub_ns[chain] = ns;
}
static int create_fdb_sub_ns_prio_chain(struct mlx5_flow_steering *steering,
struct fs_prio *maj_prio)
{
struct mlx5_flow_namespace *ns;
struct fs_prio *maj_prio;
struct fs_prio *min_prio;
int prio;
ns = fs_create_namespace(maj_prio, MLX5_FLOW_TABLE_MISS_ACTION_DEF);
if (IS_ERR(ns))
return PTR_ERR(ns);
for (prio = 0; prio < FDB_TC_MAX_PRIO; prio++) {
min_prio = fs_create_prio(ns, prio, FDB_TC_LEVELS_PER_PRIO);
if (IS_ERR(min_prio))
return PTR_ERR(min_prio);
}
store_fdb_sub_ns_prio_chain(steering, ns);
return 0;
}
static int create_fdb_chains(struct mlx5_flow_steering *steering,
int fs_prio,
int chains)
{
struct fs_prio *maj_prio;
int levels;
int chain;
int prio;
int err;
levels = FDB_TC_LEVELS_PER_PRIO * FDB_TC_MAX_PRIO * chains;
maj_prio = fs_create_prio_chained(&steering->fdb_root_ns->ns,
fs_prio,
levels);
if (IS_ERR(maj_prio))
return PTR_ERR(maj_prio);
for (chain = 0; chain < chains; chain++) {
err = create_fdb_sub_ns_prio_chain(steering, maj_prio);
if (err)
return err;
}
return 0;
}
static int create_fdb_fast_path(struct mlx5_flow_steering *steering)
{
const int total_chains = FDB_TC_MAX_CHAIN + 1;
int err;
steering->fdb_sub_ns = kcalloc(total_chains,
sizeof(*steering->fdb_sub_ns),
GFP_KERNEL);
if (!steering->fdb_sub_ns)
return -ENOMEM;
err = create_fdb_chains(steering, FDB_FAST_PATH, FDB_TC_MAX_CHAIN + 1);
if (err)
return err;
return 0;
}
static int init_fdb_root_ns(struct mlx5_flow_steering *steering)
{
struct fs_prio *maj_prio;
int err;
steering->fdb_root_ns = create_root_ns(steering, FS_FT_FDB);
if (!steering->fdb_root_ns)
return -ENOMEM;
steering->fdb_sub_ns = kzalloc(sizeof(steering->fdb_sub_ns) *
(FDB_TC_MAX_CHAIN + 1), GFP_KERNEL);
if (!steering->fdb_sub_ns)
return -ENOMEM;
maj_prio = fs_create_prio(&steering->fdb_root_ns->ns, FDB_BYPASS_PATH,
1);
if (IS_ERR(maj_prio)) {
err = PTR_ERR(maj_prio);
goto out_err;
}
levels = FDB_TC_LEVELS_PER_PRIO *
FDB_TC_MAX_PRIO * (FDB_TC_MAX_CHAIN + 1);
maj_prio = fs_create_prio_chained(&steering->fdb_root_ns->ns,
FDB_FAST_PATH,
levels);
if (IS_ERR(maj_prio)) {
err = PTR_ERR(maj_prio);
err = create_fdb_fast_path(steering);
if (err)
goto out_err;
}
for (chain = 0; chain <= FDB_TC_MAX_CHAIN; chain++) {
ns = fs_create_namespace(maj_prio, MLX5_FLOW_TABLE_MISS_ACTION_DEF);
if (IS_ERR(ns)) {
err = PTR_ERR(ns);
goto out_err;
}
for (prio = 0; prio < FDB_TC_MAX_PRIO * (chain + 1); prio++) {
min_prio = fs_create_prio(ns, prio,
FDB_TC_LEVELS_PER_PRIO);
if (IS_ERR(min_prio)) {
err = PTR_ERR(min_prio);
goto out_err;
}
}
steering->fdb_sub_ns[chain] = ns;
}
maj_prio = fs_create_prio(&steering->fdb_root_ns->ns, FDB_SLOW_PATH, 1);
if (IS_ERR(maj_prio)) {