linux-kernel - [PATCH net-next 5/9] net: ethernet: ti: cpsw_ale: add cpsw_ale_policer_reset

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Message-Id: <20250319-am65-cpsw-rx-class-v1-5-2bfded07490e@kernel.org>
Date: Wed, 19 Mar 2025 15:38:31 +0200
From: Roger Quadros <rogerq@...nel.org>
To: Siddharth Vadapalli <s-vadapalli@...com>, 
 Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Russell King <linux@...linux.org.uk>, danishanwar@...com
Cc: srk@...com, linux-omap@...r.kernel.org, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Roger Quadros <rogerq@...nel.org>
Subject: [PATCH net-next 5/9] net: ethernet: ti: cpsw_ale: add
 cpsw_ale_policer_reset_entry()

Add new helper cpsw_ale_policer_reset_entry() to reset a single
policer entry. Clear all fields instead of just clearing the enable bits.

Export cpsw_ale_policer_reset() as it will be required by cpsw
drivers using policer.

Signed-off-by: Roger Quadros <rogerq@...nel.org>
---
 drivers/net/ethernet/ti/cpsw_ale.c | 35 +++++++++++++++--------------------
 drivers/net/ethernet/ti/cpsw_ale.h |  4 ++++
 2 files changed, 19 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c
index 2c780efed402..630e3a555190 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.c
+++ b/drivers/net/ethernet/ti/cpsw_ale.c
@@ -1674,30 +1674,25 @@ static void cpsw_ale_policer_thread_idx_enable(struct cpsw_ale *ale, u32 idx,
 	regmap_field_write(ale->fields[ALE_THREAD_ENABLE], enable ? 1 : 0);
 }
 
+static void cpsw_ale_policer_reset_entry(struct cpsw_ale *ale, u32 idx)
+{
+	int i;
+
+	cpsw_ale_policer_read_idx(ale, idx);
+	for (i = 0; i < CPSW_ALE_POLICER_ENTRY_WORDS; i++)
+		writel_relaxed(0, ale->params.ale_regs +
+			       ALE_POLICER_PORT_OUI + 4 * i);
+	cpsw_ale_policer_thread_idx_enable(ale, idx, 0, 0);
+	cpsw_ale_policer_write_idx(ale, idx);
+}
+
 /* Disable all policer entries and thread mappings */
-static void cpsw_ale_policer_reset(struct cpsw_ale *ale)
+void cpsw_ale_policer_reset(struct cpsw_ale *ale)
 {
 	int i;
 
-	for (i = 0; i < ale->params.num_policers ; i++) {
-		cpsw_ale_policer_read_idx(ale, i);
-		regmap_field_write(ale->fields[POL_PORT_MEN], 0);
-		regmap_field_write(ale->fields[POL_PRI_MEN], 0);
-		regmap_field_write(ale->fields[POL_OUI_MEN], 0);
-		regmap_field_write(ale->fields[POL_DST_MEN], 0);
-		regmap_field_write(ale->fields[POL_SRC_MEN], 0);
-		regmap_field_write(ale->fields[POL_OVLAN_MEN], 0);
-		regmap_field_write(ale->fields[POL_IVLAN_MEN], 0);
-		regmap_field_write(ale->fields[POL_ETHERTYPE_MEN], 0);
-		regmap_field_write(ale->fields[POL_IPSRC_MEN], 0);
-		regmap_field_write(ale->fields[POL_IPDST_MEN], 0);
-		regmap_field_write(ale->fields[POL_EN], 0);
-		regmap_field_write(ale->fields[POL_RED_DROP_EN], 0);
-		regmap_field_write(ale->fields[POL_YELLOW_DROP_EN], 0);
-		regmap_field_write(ale->fields[POL_PRIORITY_THREAD_EN], 0);
-
-		cpsw_ale_policer_thread_idx_enable(ale, i, 0, 0);
-	}
+	for (i = 0; i < ale->params.num_policers ; i++)
+		cpsw_ale_policer_reset_entry(ale, i);
 }
 
 /* Default classifier is to map 8 user priorities to N receive channels */
diff --git a/drivers/net/ethernet/ti/cpsw_ale.h b/drivers/net/ethernet/ti/cpsw_ale.h
index 87b7d1b3a34a..ce59fec75774 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.h
+++ b/drivers/net/ethernet/ti/cpsw_ale.h
@@ -156,6 +156,9 @@ enum cpsw_ale_port_state {
 #define ALE_ENTRY_BITS		68
 #define ALE_ENTRY_WORDS	DIV_ROUND_UP(ALE_ENTRY_BITS, 32)
 
+/* Policer */
+#define CPSW_ALE_POLICER_ENTRY_WORDS	8
+
 struct cpsw_ale *cpsw_ale_create(struct cpsw_ale_params *params);
 
 void cpsw_ale_start(struct cpsw_ale *ale);
@@ -195,5 +198,6 @@ int cpsw_ale_vlan_del_modify(struct cpsw_ale *ale, u16 vid, int port_mask);
 void cpsw_ale_set_unreg_mcast(struct cpsw_ale *ale, int unreg_mcast_mask,
 			      bool add);
 void cpsw_ale_classifier_setup_default(struct cpsw_ale *ale, int num_rx_ch);
+void cpsw_ale_policer_reset(struct cpsw_ale *ale);
 
 #endif

-- 
2.34.1