1 files changed, 408 insertions, 3 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index 6c305b6ecad0..7a01dee2f9a8 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:
@@ -303,8 +321,6 @@ static int tc_setup_cbs(struct stmmac_priv *priv,
 		return -EINVAL;
 	if (!priv->dma_cap.av)
 		return -EOPNOTSUPP;
-	if (priv->speed != SPEED_100 && priv->speed != SPEED_1000)
-		return -EOPNOTSUPP;
 
 	mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use;
 	if (mode_to_use == MTL_QUEUE_DCB && qopt->enable) {
@@ -349,8 +365,397 @@ 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;
+}
+
+static 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;
+
+	/* When RSS is enabled, the filtering will be bypassed */
+	if (priv->rss.enable)
+		return -EBUSY;
+
+	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;
+}
+
+static int tc_setup_taprio(struct stmmac_priv *priv,
+			   struct tc_taprio_qopt_offload *qopt)
+{
+	u32 size, wid = priv->dma_cap.estwid, dep = priv->dma_cap.estdep;
+	struct plat_stmmacenet_data *plat = priv->plat;
+	struct timespec64 time;
+	bool fpe = false;
+	int i, ret = 0;
+	u64 ctr;
+
+	if (!priv->dma_cap.estsel)
+		return -EOPNOTSUPP;
+
+	switch (wid) {
+	case 0x1:
+		wid = 16;
+		break;
+	case 0x2:
+		wid = 20;
+		break;
+	case 0x3:
+		wid = 24;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	switch (dep) {
+	case 0x1:
+		dep = 64;
+		break;
+	case 0x2:
+		dep = 128;
+		break;
+	case 0x3:
+		dep = 256;
+		break;
+	case 0x4:
+		dep = 512;
+		break;
+	case 0x5:
+		dep = 1024;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	if (!qopt->enable)
+		goto disable;
+	if (qopt->num_entries >= dep)
+		return -EINVAL;
+	if (!qopt->base_time)
+		return -ERANGE;
+	if (!qopt->cycle_time)
+		return -ERANGE;
+
+	if (!plat->est) {
+		plat->est = devm_kzalloc(priv->device, sizeof(*plat->est),
+					 GFP_KERNEL);
+		if (!plat->est)
+			return -ENOMEM;
+	} else {
+		memset(plat->est, 0, sizeof(*plat->est));
+	}
+
+	size = qopt->num_entries;
+
+	priv->plat->est->gcl_size = size;
+	priv->plat->est->enable = qopt->enable;
+
+	for (i = 0; i < size; i++) {
+		s64 delta_ns = qopt->entries[i].interval;
+		u32 gates = qopt->entries[i].gate_mask;
+
+		if (delta_ns > GENMASK(wid, 0))
+			return -ERANGE;
+		if (gates > GENMASK(31 - wid, 0))
+			return -ERANGE;
+
+		switch (qopt->entries[i].command) {
+		case TC_TAPRIO_CMD_SET_GATES:
+			if (fpe)
+				return -EINVAL;
+			break;
+		case TC_TAPRIO_CMD_SET_AND_HOLD:
+			gates |= BIT(0);
+			fpe = true;
+			break;
+		case TC_TAPRIO_CMD_SET_AND_RELEASE:
+			gates &= ~BIT(0);
+			fpe = true;
+			break;
+		default:
+			return -EOPNOTSUPP;
+		}
+
+		priv->plat->est->gcl[i] = delta_ns | (gates << wid);
+	}
+
+	/* Adjust for real system time */
+	time = ktime_to_timespec64(qopt->base_time);
+	priv->plat->est->btr[0] = (u32)time.tv_nsec;
+	priv->plat->est->btr[1] = (u32)time.tv_sec;
+
+	ctr = qopt->cycle_time;
+	priv->plat->est->ctr[0] = do_div(ctr, NSEC_PER_SEC);
+	priv->plat->est->ctr[1] = (u32)ctr;
+
+	if (fpe && !priv->dma_cap.fpesel)
+		return -EOPNOTSUPP;
+
+	ret = stmmac_fpe_configure(priv, priv->ioaddr,
+				   priv->plat->tx_queues_to_use,
+				   priv->plat->rx_queues_to_use, fpe);
+	if (ret && fpe) {
+		netdev_err(priv->dev, "failed to enable Frame Preemption\n");
+		return ret;
+	}
+
+	ret = stmmac_est_configure(priv, priv->ioaddr, priv->plat->est,
+				   priv->plat->clk_ptp_rate);
+	if (ret) {
+		netdev_err(priv->dev, "failed to configure EST\n");
+		goto disable;
+	}
+
+	netdev_info(priv->dev, "configured EST\n");
+	return 0;
+
+disable:
+	priv->plat->est->enable = false;
+	stmmac_est_configure(priv, priv->ioaddr, priv->plat->est,
+			     priv->plat->clk_ptp_rate);
+	return ret;
+}
+
+static int tc_setup_etf(struct stmmac_priv *priv,
+			struct tc_etf_qopt_offload *qopt)
+{
+	if (!priv->dma_cap.tbssel)
+		return -EOPNOTSUPP;
+	if (qopt->queue >= priv->plat->tx_queues_to_use)
+		return -EINVAL;
+	if (!(priv->tx_queue[qopt->queue].tbs & STMMAC_TBS_AVAIL))
+		return -EINVAL;
+
+	if (qopt->enable)
+		priv->tx_queue[qopt->queue].tbs |= STMMAC_TBS_EN;
+	else
+		priv->tx_queue[qopt->queue].tbs &= ~STMMAC_TBS_EN;
+
+	netdev_info(priv->dev, "%s ETF for Queue %d\n",
+		    qopt->enable ? "enabled" : "disabled", qopt->queue);
+	return 0;
+}
+
 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,
+	.setup_taprio = tc_setup_taprio,
+	.setup_etf = tc_setup_etf,
 };