1 files changed, 575 insertions, 0 deletions

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_flower.c b/drivers/net/ethernet/marvell/prestera/prestera_flower.c
new file mode 100644
index 000000000..91a478b75
--- /dev/null
+++ b/drivers/net/ethernet/marvell/prestera/prestera_flower.c
@@ -0,0 +1,575 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/* Copyright (c) 2020 Marvell International Ltd. All rights reserved */
+
+#include "prestera.h"
+#include "prestera_acl.h"
+#include "prestera_flow.h"
+#include "prestera_flower.h"
+#include "prestera_matchall.h"
+
+struct prestera_flower_template {
+	struct prestera_acl_ruleset *ruleset;
+	struct list_head list;
+	u32 chain_index;
+};
+
+static void
+prestera_flower_template_free(struct prestera_flower_template *template)
+{
+	prestera_acl_ruleset_put(template->ruleset);
+	list_del(&template->list);
+	kfree(template);
+}
+
+void prestera_flower_template_cleanup(struct prestera_flow_block *block)
+{
+	struct prestera_flower_template *template, *tmp;
+
+	/* put the reference to all rulesets kept in tmpl create */
+	list_for_each_entry_safe(template, tmp, &block->template_list, list)
+		prestera_flower_template_free(template);
+}
+
+static int
+prestera_flower_parse_goto_action(struct prestera_flow_block *block,
+				  struct prestera_acl_rule *rule,
+				  u32 chain_index,
+				  const struct flow_action_entry *act)
+{
+	struct prestera_acl_ruleset *ruleset;
+
+	if (act->chain_index <= chain_index)
+		/* we can jump only forward */
+		return -EINVAL;
+
+	if (rule->re_arg.jump.valid)
+		return -EEXIST;
+
+	ruleset = prestera_acl_ruleset_get(block->sw->acl, block,
+					   act->chain_index);
+	if (IS_ERR(ruleset))
+		return PTR_ERR(ruleset);
+
+	rule->re_arg.jump.valid = 1;
+	rule->re_arg.jump.i.index = prestera_acl_ruleset_index_get(ruleset);
+
+	rule->jump_ruleset = ruleset;
+
+	return 0;
+}
+
+static int prestera_flower_parse_actions(struct prestera_flow_block *block,
+					 struct prestera_acl_rule *rule,
+					 struct flow_action *flow_action,
+					 u32 chain_index,
+					 struct netlink_ext_ack *extack)
+{
+	const struct flow_action_entry *act;
+	int err, i;
+
+	/* whole struct (rule->re_arg) must be initialized with 0 */
+	if (!flow_action_has_entries(flow_action))
+		return 0;
+
+	if (!flow_action_mixed_hw_stats_check(flow_action, extack))
+		return -EOPNOTSUPP;
+
+	act = flow_action_first_entry_get(flow_action);
+	if (act->hw_stats & FLOW_ACTION_HW_STATS_DISABLED) {
+		/* Nothing to do */
+	} else if (act->hw_stats & FLOW_ACTION_HW_STATS_DELAYED) {
+		/* setup counter first */
+		rule->re_arg.count.valid = true;
+		err = prestera_acl_chain_to_client(chain_index, block->ingress,
+						   &rule->re_arg.count.client);
+		if (err)
+			return err;
+	} else {
+		NL_SET_ERR_MSG_MOD(extack, "Unsupported action HW stats type");
+		return -EOPNOTSUPP;
+	}
+
+	flow_action_for_each(i, act, flow_action) {
+		switch (act->id) {
+		case FLOW_ACTION_ACCEPT:
+			if (rule->re_arg.accept.valid)
+				return -EEXIST;
+
+			rule->re_arg.accept.valid = 1;
+			break;
+		case FLOW_ACTION_DROP:
+			if (rule->re_arg.drop.valid)
+				return -EEXIST;
+
+			rule->re_arg.drop.valid = 1;
+			break;
+		case FLOW_ACTION_TRAP:
+			if (rule->re_arg.trap.valid)
+				return -EEXIST;
+
+			rule->re_arg.trap.valid = 1;
+			break;
+		case FLOW_ACTION_POLICE:
+			if (rule->re_arg.police.valid)
+				return -EEXIST;
+
+			rule->re_arg.police.valid = 1;
+			rule->re_arg.police.rate =
+				act->police.rate_bytes_ps;
+			rule->re_arg.police.burst = act->police.burst;
+			rule->re_arg.police.ingress = block->ingress;
+			break;
+		case FLOW_ACTION_GOTO:
+			err = prestera_flower_parse_goto_action(block, rule,
+								chain_index,
+								act);
+			if (err)
+				return err;
+			break;
+		default:
+			NL_SET_ERR_MSG_MOD(extack, "Unsupported action");
+			pr_err("Unsupported action\n");
+			return -EOPNOTSUPP;
+		}
+	}
+
+	return 0;
+}
+
+static int prestera_flower_parse_meta(struct prestera_acl_rule *rule,
+				      struct flow_cls_offload *f,
+				      struct prestera_flow_block *block)
+{
+	struct flow_rule *f_rule = flow_cls_offload_flow_rule(f);
+	struct prestera_acl_match *r_match = &rule->re_key.match;
+	struct prestera_port *port;
+	struct net_device *ingress_dev;
+	struct flow_match_meta match;
+	__be16 key, mask;
+
+	flow_rule_match_meta(f_rule, &match);
+	if (match.mask->ingress_ifindex != 0xFFFFFFFF) {
+		NL_SET_ERR_MSG_MOD(f->common.extack,
+				   "Unsupported ingress ifindex mask");
+		return -EINVAL;
+	}
+
+	ingress_dev = __dev_get_by_index(block->net,
+					 match.key->ingress_ifindex);
+	if (!ingress_dev) {
+		NL_SET_ERR_MSG_MOD(f->common.extack,
+				   "Can't find specified ingress port to match on");
+		return -EINVAL;
+	}
+
+	if (!prestera_netdev_check(ingress_dev)) {
+		NL_SET_ERR_MSG_MOD(f->common.extack,
+				   "Can't match on switchdev ingress port");
+		return -EINVAL;
+	}
+	port = netdev_priv(ingress_dev);
+
+	mask = htons(0x1FFF << 3);
+	key = htons(port->hw_id << 3);
+	rule_match_set(r_match->key, SYS_PORT, key);
+	rule_match_set(r_match->mask, SYS_PORT, mask);
+
+	mask = htons(0x3FF);
+	key = htons(port->dev_id);
+	rule_match_set(r_match->key, SYS_DEV, key);
+	rule_match_set(r_match->mask, SYS_DEV, mask);
+
+	return 0;
+}
+
+static int prestera_flower_parse(struct prestera_flow_block *block,
+				 struct prestera_acl_rule *rule,
+				 struct flow_cls_offload *f)
+{
+	struct flow_rule *f_rule = flow_cls_offload_flow_rule(f);
+	struct flow_dissector *dissector = f_rule->match.dissector;
+	struct prestera_acl_match *r_match = &rule->re_key.match;
+	__be16 n_proto_mask = 0;
+	__be16 n_proto_key = 0;
+	u16 addr_type = 0;
+	u8 ip_proto = 0;
+	int err;
+
+	if (dissector->used_keys &
+	    ~(BIT(FLOW_DISSECTOR_KEY_META) |
+	      BIT(FLOW_DISSECTOR_KEY_CONTROL) |
+	      BIT(FLOW_DISSECTOR_KEY_BASIC) |
+	      BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
+	      BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
+	      BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
+	      BIT(FLOW_DISSECTOR_KEY_ICMP) |
+	      BIT(FLOW_DISSECTOR_KEY_PORTS) |
+	      BIT(FLOW_DISSECTOR_KEY_PORTS_RANGE) |
+	      BIT(FLOW_DISSECTOR_KEY_VLAN))) {
+		NL_SET_ERR_MSG_MOD(f->common.extack, "Unsupported key");
+		return -EOPNOTSUPP;
+	}
+
+	prestera_acl_rule_priority_set(rule, f->common.prio);
+
+	if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_META)) {
+		err = prestera_flower_parse_meta(rule, f, block);
+		if (err)
+			return err;
+	}
+
+	if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_CONTROL)) {
+		struct flow_match_control match;
+
+		flow_rule_match_control(f_rule, &match);
+		addr_type = match.key->addr_type;
+	}
+
+	if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_BASIC)) {
+		struct flow_match_basic match;
+
+		flow_rule_match_basic(f_rule, &match);
+		n_proto_key = match.key->n_proto;
+		n_proto_mask = match.mask->n_proto;
+
+		if (ntohs(match.key->n_proto) == ETH_P_ALL) {
+			n_proto_key = 0;
+			n_proto_mask = 0;
+		}
+
+		rule_match_set(r_match->key, ETH_TYPE, n_proto_key);
+		rule_match_set(r_match->mask, ETH_TYPE, n_proto_mask);
+
+		rule_match_set(r_match->key, IP_PROTO, match.key->ip_proto);
+		rule_match_set(r_match->mask, IP_PROTO, match.mask->ip_proto);
+		ip_proto = match.key->ip_proto;
+	}
+
+	if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
+		struct flow_match_eth_addrs match;
+
+		flow_rule_match_eth_addrs(f_rule, &match);
+
+		/* DA key, mask */
+		rule_match_set_n(r_match->key,
+				 ETH_DMAC_0, &match.key->dst[0], 4);
+		rule_match_set_n(r_match->key,
+				 ETH_DMAC_1, &match.key->dst[4], 2);
+
+		rule_match_set_n(r_match->mask,
+				 ETH_DMAC_0, &match.mask->dst[0], 4);
+		rule_match_set_n(r_match->mask,
+				 ETH_DMAC_1, &match.mask->dst[4], 2);
+
+		/* SA key, mask */
+		rule_match_set_n(r_match->key,
+				 ETH_SMAC_0, &match.key->src[0], 4);
+		rule_match_set_n(r_match->key,
+				 ETH_SMAC_1, &match.key->src[4], 2);
+
+		rule_match_set_n(r_match->mask,
+				 ETH_SMAC_0, &match.mask->src[0], 4);
+		rule_match_set_n(r_match->mask,
+				 ETH_SMAC_1, &match.mask->src[4], 2);
+	}
+
+	if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
+		struct flow_match_ipv4_addrs match;
+
+		flow_rule_match_ipv4_addrs(f_rule, &match);
+
+		rule_match_set(r_match->key, IP_SRC, match.key->src);
+		rule_match_set(r_match->mask, IP_SRC, match.mask->src);
+
+		rule_match_set(r_match->key, IP_DST, match.key->dst);
+		rule_match_set(r_match->mask, IP_DST, match.mask->dst);
+	}
+
+	if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_PORTS)) {
+		struct flow_match_ports match;
+
+		if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP) {
+			NL_SET_ERR_MSG_MOD
+			    (f->common.extack,
+			     "Only UDP and TCP keys are supported");
+			return -EINVAL;
+		}
+
+		flow_rule_match_ports(f_rule, &match);
+
+		rule_match_set(r_match->key, L4_PORT_SRC, match.key->src);
+		rule_match_set(r_match->mask, L4_PORT_SRC, match.mask->src);
+
+		rule_match_set(r_match->key, L4_PORT_DST, match.key->dst);
+		rule_match_set(r_match->mask, L4_PORT_DST, match.mask->dst);
+	}
+
+	if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_PORTS_RANGE)) {
+		struct flow_match_ports_range match;
+		__be32 tp_key, tp_mask;
+
+		flow_rule_match_ports_range(f_rule, &match);
+
+		/* src port range (min, max) */
+		tp_key = htonl(ntohs(match.key->tp_min.src) |
+			       (ntohs(match.key->tp_max.src) << 16));
+		tp_mask = htonl(ntohs(match.mask->tp_min.src) |
+				(ntohs(match.mask->tp_max.src) << 16));
+		rule_match_set(r_match->key, L4_PORT_RANGE_SRC, tp_key);
+		rule_match_set(r_match->mask, L4_PORT_RANGE_SRC, tp_mask);
+
+		/* dst port range (min, max) */
+		tp_key = htonl(ntohs(match.key->tp_min.dst) |
+			       (ntohs(match.key->tp_max.dst) << 16));
+		tp_mask = htonl(ntohs(match.mask->tp_min.dst) |
+				(ntohs(match.mask->tp_max.dst) << 16));
+		rule_match_set(r_match->key, L4_PORT_RANGE_DST, tp_key);
+		rule_match_set(r_match->mask, L4_PORT_RANGE_DST, tp_mask);
+	}
+
+	if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_VLAN)) {
+		struct flow_match_vlan match;
+
+		flow_rule_match_vlan(f_rule, &match);
+
+		if (match.mask->vlan_id != 0) {
+			__be16 key = cpu_to_be16(match.key->vlan_id);
+			__be16 mask = cpu_to_be16(match.mask->vlan_id);
+
+			rule_match_set(r_match->key, VLAN_ID, key);
+			rule_match_set(r_match->mask, VLAN_ID, mask);
+		}
+
+		rule_match_set(r_match->key, VLAN_TPID, match.key->vlan_tpid);
+		rule_match_set(r_match->mask, VLAN_TPID, match.mask->vlan_tpid);
+	}
+
+	if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_ICMP)) {
+		struct flow_match_icmp match;
+
+		flow_rule_match_icmp(f_rule, &match);
+
+		rule_match_set(r_match->key, ICMP_TYPE, match.key->type);
+		rule_match_set(r_match->mask, ICMP_TYPE, match.mask->type);
+
+		rule_match_set(r_match->key, ICMP_CODE, match.key->code);
+		rule_match_set(r_match->mask, ICMP_CODE, match.mask->code);
+	}
+
+	return prestera_flower_parse_actions(block, rule, &f->rule->action,
+					     f->common.chain_index,
+					     f->common.extack);
+}
+
+static int prestera_flower_prio_check(struct prestera_flow_block *block,
+				      struct flow_cls_offload *f)
+{
+	u32 mall_prio_min;
+	u32 mall_prio_max;
+	int err;
+
+	err = prestera_mall_prio_get(block, &mall_prio_min, &mall_prio_max);
+	if (err == -ENOENT)
+		/* No matchall filters installed on this chain. */
+		return 0;
+
+	if (err) {
+		NL_SET_ERR_MSG(f->common.extack, "Failed to get matchall priorities");
+		return err;
+	}
+
+	if (f->common.prio <= mall_prio_max && block->ingress) {
+		NL_SET_ERR_MSG(f->common.extack,
+			       "Failed to add in front of existing matchall rules");
+		return -EOPNOTSUPP;
+	}
+	if (f->common.prio >= mall_prio_min && !block->ingress) {
+		NL_SET_ERR_MSG(f->common.extack, "Failed to add behind of existing matchall rules");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+int prestera_flower_prio_get(struct prestera_flow_block *block, u32 chain_index,
+			     u32 *prio_min, u32 *prio_max)
+{
+	struct prestera_acl_ruleset *ruleset;
+
+	ruleset = prestera_acl_ruleset_lookup(block->sw->acl, block, chain_index);
+	if (IS_ERR(ruleset))
+		return PTR_ERR(ruleset);
+
+	prestera_acl_ruleset_prio_get(ruleset, prio_min, prio_max);
+	return 0;
+}
+
+int prestera_flower_replace(struct prestera_flow_block *block,
+			    struct flow_cls_offload *f)
+{
+	struct prestera_acl_ruleset *ruleset;
+	struct prestera_acl *acl = block->sw->acl;
+	struct prestera_acl_rule *rule;
+	int err;
+
+	err = prestera_flower_prio_check(block, f);
+	if (err)
+		return err;
+
+	ruleset = prestera_acl_ruleset_get(acl, block, f->common.chain_index);
+	if (IS_ERR(ruleset))
+		return PTR_ERR(ruleset);
+
+	/* increments the ruleset reference */
+	rule = prestera_acl_rule_create(ruleset, f->cookie,
+					f->common.chain_index);
+	if (IS_ERR(rule)) {
+		err = PTR_ERR(rule);
+		goto err_rule_create;
+	}
+
+	err = prestera_flower_parse(block, rule, f);
+	if (err)
+		goto err_rule_add;
+
+	if (!prestera_acl_ruleset_is_offload(ruleset)) {
+		err = prestera_acl_ruleset_offload(ruleset);
+		if (err)
+			goto err_ruleset_offload;
+	}
+
+	err = prestera_acl_rule_add(block->sw, rule);
+	if (err)
+		goto err_rule_add;
+
+	prestera_acl_ruleset_put(ruleset);
+	return 0;
+
+err_ruleset_offload:
+err_rule_add:
+	prestera_acl_rule_destroy(rule);
+err_rule_create:
+	prestera_acl_ruleset_put(ruleset);
+	return err;
+}
+
+void prestera_flower_destroy(struct prestera_flow_block *block,
+			     struct flow_cls_offload *f)
+{
+	struct prestera_acl_ruleset *ruleset;
+	struct prestera_acl_rule *rule;
+
+	ruleset = prestera_acl_ruleset_lookup(block->sw->acl, block,
+					      f->common.chain_index);
+	if (IS_ERR(ruleset))
+		return;
+
+	rule = prestera_acl_rule_lookup(ruleset, f->cookie);
+	if (rule) {
+		prestera_acl_rule_del(block->sw, rule);
+		prestera_acl_rule_destroy(rule);
+	}
+	prestera_acl_ruleset_put(ruleset);
+}
+
+int prestera_flower_tmplt_create(struct prestera_flow_block *block,
+				 struct flow_cls_offload *f)
+{
+	struct prestera_flower_template *template;
+	struct prestera_acl_ruleset *ruleset;
+	struct prestera_acl_rule rule;
+	int err;
+
+	memset(&rule, 0, sizeof(rule));
+	err = prestera_flower_parse(block, &rule, f);
+	if (err)
+		return err;
+
+	template = kmalloc(sizeof(*template), GFP_KERNEL);
+	if (!template) {
+		err = -ENOMEM;
+		goto err_malloc;
+	}
+
+	prestera_acl_rule_keymask_pcl_id_set(&rule, 0);
+	ruleset = prestera_acl_ruleset_get(block->sw->acl, block,
+					   f->common.chain_index);
+	if (IS_ERR_OR_NULL(ruleset)) {
+		err = -EINVAL;
+		goto err_ruleset_get;
+	}
+
+	/* preserve keymask/template to this ruleset */
+	err = prestera_acl_ruleset_keymask_set(ruleset, rule.re_key.match.mask);
+	if (err)
+		goto err_ruleset_keymask_set;
+
+	/* skip error, as it is not possible to reject template operation,
+	 * so, keep the reference to the ruleset for rules to be added
+	 * to that ruleset later. In case of offload fail, the ruleset
+	 * will be offloaded again during adding a new rule. Also,
+	 * unlikly possble that ruleset is already offloaded at this staage.
+	 */
+	prestera_acl_ruleset_offload(ruleset);
+
+	/* keep the reference to the ruleset */
+	template->ruleset = ruleset;
+	template->chain_index = f->common.chain_index;
+	list_add_rcu(&template->list, &block->template_list);
+	return 0;
+
+err_ruleset_keymask_set:
+	prestera_acl_ruleset_put(ruleset);
+err_ruleset_get:
+	kfree(template);
+err_malloc:
+	NL_SET_ERR_MSG_MOD(f->common.extack, "Create chain template failed");
+	return err;
+}
+
+void prestera_flower_tmplt_destroy(struct prestera_flow_block *block,
+				   struct flow_cls_offload *f)
+{
+	struct prestera_flower_template *template, *tmp;
+
+	list_for_each_entry_safe(template, tmp, &block->template_list, list)
+		if (template->chain_index == f->common.chain_index) {
+			/* put the reference to the ruleset kept in create */
+			prestera_flower_template_free(template);
+			return;
+		}
+}
+
+int prestera_flower_stats(struct prestera_flow_block *block,
+			  struct flow_cls_offload *f)
+{
+	struct prestera_acl_ruleset *ruleset;
+	struct prestera_acl_rule *rule;
+	u64 packets;
+	u64 lastuse;
+	u64 bytes;
+	int err;
+
+	ruleset = prestera_acl_ruleset_lookup(block->sw->acl, block,
+					      f->common.chain_index);
+	if (IS_ERR(ruleset))
+		return PTR_ERR(ruleset);
+
+	rule = prestera_acl_rule_lookup(ruleset, f->cookie);
+	if (!rule) {
+		err = -EINVAL;
+		goto err_rule_get_stats;
+	}
+
+	err = prestera_acl_rule_get_stats(block->sw->acl, rule, &packets,
+					  &bytes, &lastuse);
+	if (err)
+		goto err_rule_get_stats;
+
+	flow_stats_update(&f->stats, bytes, packets, 0, lastuse,
+			  FLOW_ACTION_HW_STATS_DELAYED);
+
+err_rule_get_stats:
+	prestera_acl_ruleset_put(ruleset);
+	return err;
+}