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Message-Id: <20181211232409.3374-10-saeedm@mellanox.com>
Date: Tue, 11 Dec 2018 15:24:04 -0800
From: Saeed Mahameed <saeedm@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org, Eli Britstein <elibr@...lanox.com>,
Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 09/14] net/mlx5e: Allow association of a flow to multiple encaps
From: Eli Britstein <elibr@...lanox.com>
Currently a flow can be associated with a single encap entry. The
extended destination feature enables the driver to configure multiple
encap entries per flow.
Change the encap flow association field to array as a pre-step towards
supporting multiple encap destinations. Use only the first array
element, with no functional change.
Signed-off-by: Eli Britstein <elibr@...lanox.com>
Reviewed-by: Oz Shlomo <ozsh@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
.../net/ethernet/mellanox/mlx5/core/en_tc.c | 48 ++++++++++++++++---
1 file changed, 41 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 67b3c6f1aeae..58b83489a6d6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -78,13 +78,39 @@ enum {
#define MLX5E_TC_MAX_SPLITS 1
+/* Helper struct for accessing a struct containing list_head array.
+ * Containing struct
+ * |- Helper array
+ * [0] Helper item 0
+ * |- list_head item 0
+ * |- index (0)
+ * [1] Helper item 1
+ * |- list_head item 1
+ * |- index (1)
+ * To access the containing struct from one of the list_head items:
+ * 1. Get the helper item from the list_head item using
+ * helper item =
+ * container_of(list_head item, helper struct type, list_head field)
+ * 2. Get the contining struct from the helper item and its index in the array:
+ * containing struct =
+ * container_of(helper item, containing struct type, helper field[index])
+ */
+struct encap_flow_item {
+ struct list_head list;
+ int index;
+};
+
struct mlx5e_tc_flow {
struct rhash_head node;
struct mlx5e_priv *priv;
u64 cookie;
u16 flags;
struct mlx5_flow_handle *rule[MLX5E_TC_MAX_SPLITS + 1];
- struct list_head encap; /* flows sharing the same encap ID */
+ /* Flow can be associated with multiple encap IDs.
+ * The number of encaps is bounded by the number of supported
+ * destinations.
+ */
+ struct encap_flow_item encaps[MLX5_MAX_FLOW_FWD_VPORTS];
struct list_head mod_hdr; /* flows sharing the same mod hdr ID */
struct list_head hairpin; /* flows sharing the same hairpin */
union {
@@ -1043,6 +1069,7 @@ void mlx5e_tc_encap_flows_add(struct mlx5e_priv *priv,
struct mlx5_esw_flow_attr slow_attr, *esw_attr;
struct mlx5_flow_handle *rule;
struct mlx5_flow_spec *spec;
+ struct encap_flow_item *efi;
struct mlx5e_tc_flow *flow;
int err;
@@ -1059,7 +1086,8 @@ void mlx5e_tc_encap_flows_add(struct mlx5e_priv *priv,
e->flags |= MLX5_ENCAP_ENTRY_VALID;
mlx5e_rep_queue_neigh_stats_work(priv);
- list_for_each_entry(flow, &e->flows, encap) {
+ list_for_each_entry(efi, &e->flows, list) {
+ flow = container_of(efi, struct mlx5e_tc_flow, encaps[efi->index]);
esw_attr = flow->esw_attr;
esw_attr->encap_id = e->encap_id;
spec = &esw_attr->parse_attr->spec;
@@ -1086,10 +1114,12 @@ void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv,
struct mlx5_esw_flow_attr slow_attr;
struct mlx5_flow_handle *rule;
struct mlx5_flow_spec *spec;
+ struct encap_flow_item *efi;
struct mlx5e_tc_flow *flow;
int err;
- list_for_each_entry(flow, &e->flows, encap) {
+ list_for_each_entry(efi, &e->flows, list) {
+ flow = container_of(efi, struct mlx5e_tc_flow, encaps[efi->index]);
spec = &flow->esw_attr->parse_attr->spec;
/* update from encap rule to slow path rule */
@@ -1142,9 +1172,12 @@ void mlx5e_tc_update_neigh_used_value(struct mlx5e_neigh_hash_entry *nhe)
return;
list_for_each_entry(e, &nhe->encap_list, encap_list) {
+ struct encap_flow_item *efi;
if (!(e->flags & MLX5_ENCAP_ENTRY_VALID))
continue;
- list_for_each_entry(flow, &e->flows, encap) {
+ list_for_each_entry(efi, &e->flows, list) {
+ flow = container_of(efi, struct mlx5e_tc_flow,
+ encaps[efi->index]);
if (flow->flags & MLX5E_TC_FLOW_OFFLOADED) {
counter = mlx5e_tc_get_counter(flow);
mlx5_fc_query_cached(counter, &bytes, &packets, &lastuse);
@@ -1176,9 +1209,9 @@ void mlx5e_tc_update_neigh_used_value(struct mlx5e_neigh_hash_entry *nhe)
static void mlx5e_detach_encap(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow)
{
- struct list_head *next = flow->encap.next;
+ struct list_head *next = flow->encaps[0].list.next;
- list_del(&flow->encap);
+ list_del(&flow->encaps[0].list);
if (list_empty(next)) {
struct mlx5e_encap_entry *e;
@@ -2338,7 +2371,8 @@ static int mlx5e_attach_encap(struct mlx5e_priv *priv,
hash_add_rcu(esw->offloads.encap_tbl, &e->encap_hlist, hash_key);
attach_flow:
- list_add(&flow->encap, &e->flows);
+ list_add(&flow->encaps[0].list, &e->flows);
+ flow->encaps[0].index = 0;
*encap_dev = e->out_dev;
if (e->flags & MLX5_ENCAP_ENTRY_VALID)
attr->encap_id = e->encap_id;
--
2.19.2
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