[net-next PATCH v3 1/2] net: dsa: qca8k: add QCA8K_ATU_TABLE_SIZE define for fdb access

From: Christian Marangi
Date: Wed Jan 25 2023 - 15:35:35 EST


Add and use QCA8K_ATU_TABLE_SIZE instead of hardcoding the ATU size with
a pure number and using sizeof on the array.

Signed-off-by: Christian Marangi <ansuelsmth@xxxxxxxxx>
---

v3:
- Add patch

drivers/net/dsa/qca/qca8k-common.c | 10 ++++++----
drivers/net/dsa/qca/qca8k.h | 2 ++
2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/dsa/qca/qca8k-common.c b/drivers/net/dsa/qca/qca8k-common.c
index fb45b598847b..2f82a8dae9ff 100644
--- a/drivers/net/dsa/qca/qca8k-common.c
+++ b/drivers/net/dsa/qca/qca8k-common.c
@@ -150,11 +150,12 @@ static int qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)

static int qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
{
- u32 reg[3];
+ u32 reg[QCA8K_ATU_TABLE_SIZE];
int ret;

/* load the ARL table into an array */
- ret = qca8k_bulk_read(priv, QCA8K_REG_ATU_DATA0, reg, sizeof(reg));
+ ret = qca8k_bulk_read(priv, QCA8K_REG_ATU_DATA0, reg,
+ QCA8K_ATU_TABLE_SIZE * sizeof(u32));
if (ret)
return ret;

@@ -178,7 +179,7 @@ static int qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
static void qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask,
const u8 *mac, u8 aging)
{
- u32 reg[3] = { 0 };
+ u32 reg[QCA8K_ATU_TABLE_SIZE] = { 0 };

/* vid - 83:72 */
reg[2] = FIELD_PREP(QCA8K_ATU_VID_MASK, vid);
@@ -195,7 +196,8 @@ static void qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask,
reg[0] |= FIELD_PREP(QCA8K_ATU_ADDR5_MASK, mac[5]);

/* load the array into the ARL table */
- qca8k_bulk_write(priv, QCA8K_REG_ATU_DATA0, reg, sizeof(reg));
+ qca8k_bulk_write(priv, QCA8K_REG_ATU_DATA0, reg,
+ QCA8K_ATU_TABLE_SIZE * sizeof(u32));
}

static int qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd,
diff --git a/drivers/net/dsa/qca/qca8k.h b/drivers/net/dsa/qca/qca8k.h
index 03514f7a20be..593a882ec43c 100644
--- a/drivers/net/dsa/qca/qca8k.h
+++ b/drivers/net/dsa/qca/qca8k.h
@@ -148,6 +148,8 @@
#define QCA8K_REG_IPV4_PRI_ADDR_MASK 0x474

/* Lookup registers */
+#define QCA8K_ATU_TABLE_SIZE 3 /* 12 bytes wide table / sizeof(u32) */
+
#define QCA8K_REG_ATU_DATA0 0x600
#define QCA8K_ATU_ADDR2_MASK GENMASK(31, 24)
#define QCA8K_ATU_ADDR3_MASK GENMASK(23, 16)
--
2.38.1