[RFC net-next 4/4] net: marvell: prestera: Offload FLOW_ACTION_POLICE

[Vadym Kochan <vadym.kochan@plvision.eu>]

From: Serhiy Boiko <serhiy.boiko@plvision.eu>

Offload action police when keyed to a flower classifier.
Only rate and burst is supported for now. The conform-exceed
drop is assumed as a default value.

Policer support requires FW 3.1 version. Still to make a backward
compatibility with ACL of FW 3.0 introduced separate FW msg structs for
ACL calls which have different field layout.

Co-developed-by: Volodymyr Mytnyk <vmytnyk@marvell.com>
Signed-off-by: Volodymyr Mytnyk <vmytnyk@marvell.com>
Signed-off-by: Serhiy Boiko <serhiy.boiko@plvision.eu>
Co-developed-by: Vadym Kochan <vkochan@marvell.com>
Signed-off-by: Vadym Kochan <vkochan@marvell.com>
---
 .../ethernet/marvell/prestera/prestera_acl.c  |  14 ++
 .../ethernet/marvell/prestera/prestera_acl.h  |  11 +-
 .../marvell/prestera/prestera_flower.c        |  18 +++
 .../ethernet/marvell/prestera/prestera_hw.c   | 125 +++++++++++++++++-
 .../ethernet/marvell/prestera/prestera_pci.c  |   1 +
 5 files changed, 165 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_acl.c b/drivers/net/ethernet/marvell/prestera/prestera_acl.c
index 83c75ffb1a1c..9a473f94fab0 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_acl.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_acl.c
@@ -8,6 +8,8 @@
 #include "prestera_acl.h"
 #include "prestera_span.h"
 
+#define PRESTERA_ACL_DEF_HW_TC		3
+
 struct prestera_acl {
 	struct prestera_switch *sw;
 	struct list_head rules;
@@ -29,6 +31,7 @@ struct prestera_acl_rule {
 	u32 priority;
 	u8 n_actions;
 	u8 n_matches;
+	u8 hw_tc;
 	u32 id;
 };
 
@@ -203,6 +206,7 @@ prestera_acl_rule_create(struct prestera_flow_block *block,
 	INIT_LIST_HEAD(&rule->action_list);
 	rule->cookie = cookie;
 	rule->block = block;
+	rule->hw_tc = PRESTERA_ACL_DEF_HW_TC;
 
 	return rule;
 }
@@ -251,6 +255,16 @@ void prestera_acl_rule_priority_set(struct prestera_acl_rule *rule,
 	rule->priority = priority;
 }
 
+u8 prestera_acl_rule_hw_tc_get(struct prestera_acl_rule *rule)
+{
+	return rule->hw_tc;
+}
+
+void prestera_acl_rule_hw_tc_set(struct prestera_acl_rule *rule, u8 hw_tc)
+{
+	rule->hw_tc = hw_tc;
+}
+
 int prestera_acl_rule_match_add(struct prestera_acl_rule *rule,
 				struct prestera_acl_rule_match_entry *entry)
 {
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_acl.h b/drivers/net/ethernet/marvell/prestera/prestera_acl.h
index 39b7869be659..2a2fbae1432a 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_acl.h
+++ b/drivers/net/ethernet/marvell/prestera/prestera_acl.h
@@ -25,7 +25,8 @@ enum prestera_acl_rule_match_entry_type {
 enum prestera_acl_rule_action {
 	PRESTERA_ACL_RULE_ACTION_ACCEPT,
 	PRESTERA_ACL_RULE_ACTION_DROP,
-	PRESTERA_ACL_RULE_ACTION_TRAP
+	PRESTERA_ACL_RULE_ACTION_TRAP,
+	PRESTERA_ACL_RULE_ACTION_POLICE,
 };
 
 struct prestera_switch;
@@ -50,6 +51,12 @@ struct prestera_flow_block {
 struct prestera_acl_rule_action_entry {
 	struct list_head list;
 	enum prestera_acl_rule_action id;
+	union {
+		struct {
+			u64 rate;
+			u64 burst;
+		} police;
+	};
 };
 
 struct prestera_acl_rule_match_entry {
@@ -120,5 +127,7 @@ void prestera_acl_rule_del(struct prestera_switch *sw,
 int prestera_acl_rule_get_stats(struct prestera_switch *sw,
 				struct prestera_acl_rule *rule,
 				u64 *packets, u64 *bytes, u64 *last_use);
+u8 prestera_acl_rule_hw_tc_get(struct prestera_acl_rule *rule);
+void prestera_acl_rule_hw_tc_set(struct prestera_acl_rule *rule, u8 hw_tc);
 
 #endif /* _PRESTERA_ACL_H_ */
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_flower.c b/drivers/net/ethernet/marvell/prestera/prestera_flower.c
index e571ba09ec08..76f30856ac98 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_flower.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_flower.c
@@ -5,6 +5,8 @@
 #include "prestera_acl.h"
 #include "prestera_flower.h"
 
+#define PRESTERA_HW_TC_NUM	8
+
 static int prestera_flower_parse_actions(struct prestera_flow_block *block,
 					 struct prestera_acl_rule *rule,
 					 struct flow_action *flow_action,
@@ -30,6 +32,11 @@ static int prestera_flower_parse_actions(struct prestera_flow_block *block,
 		case FLOW_ACTION_TRAP:
 			a_entry.id = PRESTERA_ACL_RULE_ACTION_TRAP;
 			break;
+		case FLOW_ACTION_POLICE:
+			a_entry.id = PRESTERA_ACL_RULE_ACTION_POLICE;
+			a_entry.police.rate = act->police.rate_bytes_ps;
+			a_entry.police.burst = act->police.burst;
+			break;
 		default:
 			NL_SET_ERR_MSG_MOD(extack, "Unsupported action");
 			pr_err("Unsupported action\n");
@@ -110,6 +117,17 @@ static int prestera_flower_parse(struct prestera_flow_block *block,
 		return -EOPNOTSUPP;
 	}
 
+	if (f->classid) {
+		int hw_tc = __tc_classid_to_hwtc(PRESTERA_HW_TC_NUM, f->classid);
+
+		if (hw_tc < 0) {
+			NL_SET_ERR_MSG_MOD(f->common.extack, "Unsupported HW TC");
+			return hw_tc;
+		}
+
+		prestera_acl_rule_hw_tc_set(rule, hw_tc);
+	}
+
 	prestera_acl_rule_priority_set(rule, f->common.prio);
 
 	if (flow_rule_match_key(f_rule, FLOW_DISSECTOR_KEY_META)) {
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_hw.c b/drivers/net/ethernet/marvell/prestera/prestera_hw.c
index c1297859e471..2d1dfb52aca4 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_hw.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_hw.c
@@ -91,6 +91,7 @@ enum {
 enum {
 	PRESTERA_CMD_SWITCH_ATTR_MAC = 1,
 	PRESTERA_CMD_SWITCH_ATTR_AGEING = 2,
+	PRESTERA_SWITCH_ATTR_TRAP_POLICER = 3,
 };
 
 enum {
@@ -319,6 +320,19 @@ struct prestera_msg_acl_action {
 	u32 id;
 };
 
+struct prestera_msg_acl_action_ext {
+	u32 id;
+	union {
+		struct {
+			u64 rate;
+			u64 burst;
+		} police;
+		struct {
+			u64 res[3];
+		} reserv;
+	} __packed;
+};
+
 struct prestera_msg_acl_match {
 	u32 type;
 	union {
@@ -354,6 +368,16 @@ struct prestera_msg_acl_rule_req {
 	u8 n_matches;
 };
 
+struct prestera_msg_acl_rule_ext_req {
+	struct prestera_msg_cmd cmd;
+	u32 id;
+	u32 priority;
+	u16 ruleset_id;
+	u8 n_actions;
+	u8 n_matches;
+	u8 hw_tc;
+};
+
 struct prestera_msg_acl_rule_resp {
 	struct prestera_msg_ret ret;
 	u32 id;
@@ -908,6 +932,36 @@ static int prestera_hw_acl_actions_put(struct prestera_msg_acl_action *action,
 	return 0;
 }
 
+static int prestera_hw_acl_actions_ext_put(struct prestera_msg_acl_action_ext *action,
+					   struct prestera_acl_rule *rule)
+{
+	struct list_head *a_list = prestera_acl_rule_action_list_get(rule);
+	struct prestera_acl_rule_action_entry *a_entry;
+	int i = 0;
+
+	list_for_each_entry(a_entry, a_list, list) {
+		action[i].id = a_entry->id;
+
+		switch (a_entry->id) {
+		case PRESTERA_ACL_RULE_ACTION_ACCEPT:
+		case PRESTERA_ACL_RULE_ACTION_DROP:
+		case PRESTERA_ACL_RULE_ACTION_TRAP:
+			/* just rule action id, no specific data */
+			break;
+		case PRESTERA_ACL_RULE_ACTION_POLICE:
+			action[i].police.rate = a_entry->police.rate;
+			action[i].police.burst = a_entry->police.burst;
+			break;
+		default:
+			return -EINVAL;
+		}
+
+		i++;
+	}
+
+	return 0;
+}
+
 static int prestera_hw_acl_matches_put(struct prestera_msg_acl_match *match,
 				       struct prestera_acl_rule *rule)
 {
@@ -963,9 +1017,9 @@ static int prestera_hw_acl_matches_put(struct prestera_msg_acl_match *match,
 	return 0;
 }
 
-int prestera_hw_acl_rule_add(struct prestera_switch *sw,
-			     struct prestera_acl_rule *rule,
-			     u32 *rule_id)
+int __prestera_hw_acl_rule_add(struct prestera_switch *sw,
+			       struct prestera_acl_rule *rule,
+			       u32 *rule_id)
 {
 	struct prestera_msg_acl_action *actions;
 	struct prestera_msg_acl_match *matches;
@@ -1017,6 +1071,71 @@ int prestera_hw_acl_rule_add(struct prestera_switch *sw,
 	return err;
 }
 
+int __prestera_hw_acl_rule_ext_add(struct prestera_switch *sw,
+				   struct prestera_acl_rule *rule,
+				   u32 *rule_id)
+{
+	struct prestera_msg_acl_action_ext *actions;
+	struct prestera_msg_acl_rule_ext_req *req;
+	struct prestera_msg_acl_match *matches;
+	struct prestera_msg_acl_rule_resp resp;
+	u8 n_actions;
+	u8 n_matches;
+	void *buff;
+	u32 size;
+	int err;
+
+	n_actions = prestera_acl_rule_action_len(rule);
+	n_matches = prestera_acl_rule_match_len(rule);
+
+	size = sizeof(*req) + sizeof(*actions) * n_actions +
+		sizeof(*matches) * n_matches;
+
+	buff = kzalloc(size, GFP_KERNEL);
+	if (!buff)
+		return -ENOMEM;
+
+	req = buff;
+	actions = buff + sizeof(*req);
+	matches = buff + sizeof(*req) + sizeof(*actions) * n_actions;
+
+	/* put acl actions into the message */
+	err = prestera_hw_acl_actions_ext_put(actions, rule);
+	if (err)
+		goto free_buff;
+
+	/* put acl matches into the message */
+	err = prestera_hw_acl_matches_put(matches, rule);
+	if (err)
+		goto free_buff;
+
+	req->ruleset_id = prestera_acl_rule_ruleset_id_get(rule);
+	req->priority = prestera_acl_rule_priority_get(rule);
+	req->n_actions = prestera_acl_rule_action_len(rule);
+	req->n_matches = prestera_acl_rule_match_len(rule);
+	req->hw_tc = prestera_acl_rule_hw_tc_get(rule);
+
+	err = prestera_cmd_ret(sw, PRESTERA_CMD_TYPE_ACL_RULE_ADD,
+			       &req->cmd, size, &resp.ret, sizeof(resp));
+	if (err)
+		goto free_buff;
+
+	*rule_id = resp.id;
+free_buff:
+	kfree(buff);
+	return err;
+}
+
+int prestera_hw_acl_rule_add(struct prestera_switch *sw,
+			     struct prestera_acl_rule *rule,
+			     u32 *rule_id)
+{
+	if (sw->dev->fw_rev.maj == 3 && sw->dev->fw_rev.min == 0)
+		return __prestera_hw_acl_rule_add(sw, rule, rule_id);
+
+	return __prestera_hw_acl_rule_ext_add(sw, rule, rule_id);
+};
+
 int prestera_hw_acl_rule_del(struct prestera_switch *sw, u32 rule_id)
 {
 	struct prestera_msg_acl_rule_req req = {
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_pci.c b/drivers/net/ethernet/marvell/prestera/prestera_pci.c
index ce4cf51dba5a..f988603af1b6 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_pci.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_pci.c
@@ -15,6 +15,7 @@
 #define PRESTERA_MSG_MAX_SIZE 1500
 
 static struct prestera_fw_rev prestera_fw_supp[] = {
+	{ 3, 1 },
 	{ 3, 0 },
 	{ 2, 0 }
 };
-- 
2.17.1