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path: root/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
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Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c247
1 files changed, 246 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index 6c305b6ecad0..e231098061b6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -242,9 +242,27 @@ static int tc_init(struct stmmac_priv *priv)
{
struct dma_features *dma_cap = &priv->dma_cap;
unsigned int count;
+ int i;
+
+ if (dma_cap->l3l4fnum) {
+ priv->flow_entries_max = dma_cap->l3l4fnum;
+ priv->flow_entries = devm_kcalloc(priv->device,
+ dma_cap->l3l4fnum,
+ sizeof(*priv->flow_entries),
+ GFP_KERNEL);
+ if (!priv->flow_entries)
+ return -ENOMEM;
+ for (i = 0; i < priv->flow_entries_max; i++)
+ priv->flow_entries[i].idx = i;
+
+ dev_info(priv->device, "Enabled Flow TC (entries=%d)\n",
+ priv->flow_entries_max);
+ }
+
+ /* Fail silently as we can still use remaining features, e.g. CBS */
if (!dma_cap->frpsel)
- return -EINVAL;
+ return 0;
switch (dma_cap->frpbs) {
case 0x0:
@@ -349,8 +367,235 @@ static int tc_setup_cbs(struct stmmac_priv *priv,
return 0;
}
+static int tc_parse_flow_actions(struct stmmac_priv *priv,
+ struct flow_action *action,
+ struct stmmac_flow_entry *entry)
+{
+ struct flow_action_entry *act;
+ int i;
+
+ if (!flow_action_has_entries(action))
+ return -EINVAL;
+
+ flow_action_for_each(i, act, action) {
+ switch (act->id) {
+ case FLOW_ACTION_DROP:
+ entry->action |= STMMAC_FLOW_ACTION_DROP;
+ return 0;
+ default:
+ break;
+ }
+ }
+
+ /* Nothing to do, maybe inverse filter ? */
+ return 0;
+}
+
+static int tc_add_basic_flow(struct stmmac_priv *priv,
+ struct flow_cls_offload *cls,
+ struct stmmac_flow_entry *entry)
+{
+ struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
+ struct flow_dissector *dissector = rule->match.dissector;
+ struct flow_match_basic match;
+
+ /* Nothing to do here */
+ if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_BASIC))
+ return -EINVAL;
+
+ flow_rule_match_basic(rule, &match);
+ entry->ip_proto = match.key->ip_proto;
+ return 0;
+}
+
+static int tc_add_ip4_flow(struct stmmac_priv *priv,
+ struct flow_cls_offload *cls,
+ struct stmmac_flow_entry *entry)
+{
+ struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
+ struct flow_dissector *dissector = rule->match.dissector;
+ bool inv = entry->action & STMMAC_FLOW_ACTION_DROP;
+ struct flow_match_ipv4_addrs match;
+ u32 hw_match;
+ int ret;
+
+ /* Nothing to do here */
+ if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_IPV4_ADDRS))
+ return -EINVAL;
+
+ flow_rule_match_ipv4_addrs(rule, &match);
+ hw_match = ntohl(match.key->src) & ntohl(match.mask->src);
+ if (hw_match) {
+ ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, true,
+ false, true, inv, hw_match);
+ if (ret)
+ return ret;
+ }
+
+ hw_match = ntohl(match.key->dst) & ntohl(match.mask->dst);
+ if (hw_match) {
+ ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, true,
+ false, false, inv, hw_match);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tc_add_ports_flow(struct stmmac_priv *priv,
+ struct flow_cls_offload *cls,
+ struct stmmac_flow_entry *entry)
+{
+ struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
+ struct flow_dissector *dissector = rule->match.dissector;
+ bool inv = entry->action & STMMAC_FLOW_ACTION_DROP;
+ struct flow_match_ports match;
+ u32 hw_match;
+ bool is_udp;
+ int ret;
+
+ /* Nothing to do here */
+ if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_PORTS))
+ return -EINVAL;
+
+ switch (entry->ip_proto) {
+ case IPPROTO_TCP:
+ is_udp = false;
+ break;
+ case IPPROTO_UDP:
+ is_udp = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ flow_rule_match_ports(rule, &match);
+
+ hw_match = ntohs(match.key->src) & ntohs(match.mask->src);
+ if (hw_match) {
+ ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, true,
+ is_udp, true, inv, hw_match);
+ if (ret)
+ return ret;
+ }
+
+ hw_match = ntohs(match.key->dst) & ntohs(match.mask->dst);
+ if (hw_match) {
+ ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, true,
+ is_udp, false, inv, hw_match);
+ if (ret)
+ return ret;
+ }
+
+ entry->is_l4 = true;
+ return 0;
+}
+
+static struct stmmac_flow_entry *tc_find_flow(struct stmmac_priv *priv,
+ struct flow_cls_offload *cls,
+ bool get_free)
+{
+ int i;
+
+ for (i = 0; i < priv->flow_entries_max; i++) {
+ struct stmmac_flow_entry *entry = &priv->flow_entries[i];
+
+ if (entry->cookie == cls->cookie)
+ return entry;
+ if (get_free && (entry->in_use == false))
+ return entry;
+ }
+
+ return NULL;
+}
+
+struct {
+ int (*fn)(struct stmmac_priv *priv, struct flow_cls_offload *cls,
+ struct stmmac_flow_entry *entry);
+} tc_flow_parsers[] = {
+ { .fn = tc_add_basic_flow },
+ { .fn = tc_add_ip4_flow },
+ { .fn = tc_add_ports_flow },
+};
+
+static int tc_add_flow(struct stmmac_priv *priv,
+ struct flow_cls_offload *cls)
+{
+ struct stmmac_flow_entry *entry = tc_find_flow(priv, cls, false);
+ struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
+ int i, ret;
+
+ if (!entry) {
+ entry = tc_find_flow(priv, cls, true);
+ if (!entry)
+ return -ENOENT;
+ }
+
+ ret = tc_parse_flow_actions(priv, &rule->action, entry);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < ARRAY_SIZE(tc_flow_parsers); i++) {
+ ret = tc_flow_parsers[i].fn(priv, cls, entry);
+ if (!ret) {
+ entry->in_use = true;
+ continue;
+ }
+ }
+
+ if (!entry->in_use)
+ return -EINVAL;
+
+ entry->cookie = cls->cookie;
+ return 0;
+}
+
+static int tc_del_flow(struct stmmac_priv *priv,
+ struct flow_cls_offload *cls)
+{
+ struct stmmac_flow_entry *entry = tc_find_flow(priv, cls, false);
+ int ret;
+
+ if (!entry || !entry->in_use)
+ return -ENOENT;
+
+ if (entry->is_l4) {
+ ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, false,
+ false, false, false, 0);
+ } else {
+ ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, false,
+ false, false, false, 0);
+ }
+
+ entry->in_use = false;
+ entry->cookie = 0;
+ entry->is_l4 = false;
+ return ret;
+}
+
+static int tc_setup_cls(struct stmmac_priv *priv,
+ struct flow_cls_offload *cls)
+{
+ int ret = 0;
+
+ switch (cls->command) {
+ case FLOW_CLS_REPLACE:
+ ret = tc_add_flow(priv, cls);
+ break;
+ case FLOW_CLS_DESTROY:
+ ret = tc_del_flow(priv, cls);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return ret;
+}
+
const struct stmmac_tc_ops dwmac510_tc_ops = {
.init = tc_init,
.setup_cls_u32 = tc_setup_cls_u32,
.setup_cbs = tc_setup_cbs,
+ .setup_cls = tc_setup_cls,
};
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-20 09:36:44 +0000