[RFC PATCH net-next v4 06/28] net: dsa: qca8k: improve qca8k read/write/rmw bus access

Ansuel Smith
2021-05-08T00:29:42Z

Put bus in local variable to improve faster access to the mdio bus.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
drivers/net/dsa/qca8k.c | 29 ++++++++++++++++-------------
1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 0bfb7ae4c128..f58d4543ef1e 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -142,17 +142,18 @@ qca8k_set_page(struct mii_bus *bus, u16 page)
static u32
qca8k_read(struct qca8k_priv *priv, u32 reg)
{
+ struct mii_bus *bus = priv->bus;
u16 r1, r2, page;
u32 val;

qca8k_split_addr(reg, &r1, &r2, &page);

- mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);

- qca8k_set_page(priv->bus, page);
- val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
+ qca8k_set_page(bus, page);
+ val = qca8k_mii_read32(bus, 0x10 | r2, r1);

- mutex_unlock(&priv->bus->mdio_lock);
+ mutex_unlock(&bus->mdio_lock);

return val;
}
@@ -160,35 +161,37 @@ qca8k_read(struct qca8k_priv *priv, u32 reg)
static void
qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val)
{
+ struct mii_bus *bus = priv->bus;
u16 r1, r2, page;

qca8k_split_addr(reg, &r1, &r2, &page);

- mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);

- qca8k_set_page(priv->bus, page);
- qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
+ qca8k_set_page(bus, page);
+ qca8k_mii_write32(bus, 0x10 | r2, r1, val);

- mutex_unlock(&priv->bus->mdio_lock);
+ mutex_unlock(&bus->mdio_lock);
}

static u32
qca8k_rmw(struct qca8k_priv *priv, u32 reg, u32 mask, u32 val)
{
+ struct mii_bus *bus = priv->bus;
u16 r1, r2, page;
u32 ret;

qca8k_split_addr(reg, &r1, &r2, &page);

- mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);

- qca8k_set_page(priv->bus, page);
- ret = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
+ qca8k_set_page(bus, page);
+ ret = qca8k_mii_read32(bus, 0x10 | r2, r1);
ret &= ~mask;
ret |= val;
- qca8k_mii_write32(priv->bus, 0x10 | r2, r1, ret);
+ qca8k_mii_write32(bus, 0x10 | r2, r1, ret);

- mutex_unlock(&priv->bus->mdio_lock);
+ mutex_unlock(&bus->mdio_lock);

return ret;
}
--
2.30.2