[RFC PATCH net-next v5 22/25] net: dsa: qca8k: improve internal mdio read/write bus access
From: Ansuel Smith <ansuelsmth@gmail.com>
Date: 2021-05-11 02:10:00
Also in:
lkml, netdev
Subsystem:
networking drivers, networking [dsa], the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Andrew Lunn, Vladimir Oltean, Linus Torvalds
Improve the internal mdio read/write bus access by caching the value without accessing it for every read/write. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> --- drivers/net/dsa/qca8k.c | 28 +++++++++++++++------------- 1 file changed, 15 insertions(+), 13 deletions(-)
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 307fe7eb03f3..920cdb1ff2b9 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c@@ -655,6 +655,7 @@ static int qca8k_mdio_write(struct mii_bus *salve_bus, int phy, int regnum, u16 data) { struct qca8k_priv *priv = salve_bus->priv; + struct mii_bus *bus = priv->bus; u16 r1, r2, page; u32 val; int ret;
@@ -669,22 +670,22 @@ qca8k_mdio_write(struct mii_bus *salve_bus, int phy, int regnum, u16 data) qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page); - mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED); + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); - ret = qca8k_set_page(priv->bus, page); + ret = qca8k_set_page(bus, page); if (ret) goto exit; - qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val); + qca8k_mii_write32(bus, 0x10 | r2, r1, val); - ret = qca8k_mdio_busy_wait(priv->bus, QCA8K_MDIO_MASTER_CTRL, + ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL, QCA8K_MDIO_MASTER_BUSY); exit: /* even if the busy_wait timeouts try to clear the MASTER_EN */ - qca8k_mii_write32(priv->bus, 0x10 | r2, r1, 0); + qca8k_mii_write32(bus, 0x10 | r2, r1, 0); - mutex_unlock(&priv->bus->mdio_lock); + mutex_unlock(&bus->mdio_lock); return ret; }
@@ -693,6 +694,7 @@ static int qca8k_mdio_read(struct mii_bus *salve_bus, int phy, int regnum) { struct qca8k_priv *priv = salve_bus->priv; + struct mii_bus *bus = priv->bus; u16 r1, r2, page; u32 val; int ret;
@@ -706,26 +708,26 @@ qca8k_mdio_read(struct mii_bus *salve_bus, int phy, int regnum) qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page); - mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED); + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); - ret = qca8k_set_page(priv->bus, page); + ret = qca8k_set_page(bus, page); if (ret) goto exit; - qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val); + qca8k_mii_write32(bus, 0x10 | r2, r1, val); - ret = qca8k_mdio_busy_wait(priv->bus, QCA8K_MDIO_MASTER_CTRL, + ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL, QCA8K_MDIO_MASTER_BUSY); if (ret) goto exit; - val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1); + val = qca8k_mii_read32(bus, 0x10 | r2, r1); exit: /* even if the busy_wait timeouts try to clear the MASTER_EN */ - qca8k_mii_write32(priv->bus, 0x10 | r2, r1, 0); + qca8k_mii_write32(bus, 0x10 | r2, r1, 0); - mutex_unlock(&priv->bus->mdio_lock); + mutex_unlock(&bus->mdio_lock); if (val >= 0) val &= QCA8K_MDIO_MASTER_DATA_MASK;
--
2.30.2