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openwrt/target/linux/generic/backport-6.1/790-08-v6.4-net-dsa-mt7530-...

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From 504d39cbda402df3e6fd123d040520393b6a6297 Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Mon, 3 Apr 2023 02:18:16 +0100
Subject: [PATCH 08/48] net: dsa: mt7530: introduce mutex helpers
As the MDIO bus lock only needs to be involved if actually operating
on an MDIO-connected switch we will need to skip locking for built-in
switches which are accessed via MMIO.
Create helper functions which simplify that upcoming change.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/dsa/mt7530.c | 73 ++++++++++++++++++++--------------------
1 file changed, 36 insertions(+), 37 deletions(-)
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -143,31 +143,40 @@ err:
}
static void
-core_write(struct mt7530_priv *priv, u32 reg, u32 val)
+mt7530_mutex_lock(struct mt7530_priv *priv)
{
- struct mii_bus *bus = priv->bus;
+ mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+}
- mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+static void
+mt7530_mutex_unlock(struct mt7530_priv *priv)
+{
+ mutex_unlock(&priv->bus->mdio_lock);
+}
+
+static void
+core_write(struct mt7530_priv *priv, u32 reg, u32 val)
+{
+ mt7530_mutex_lock(priv);
core_write_mmd_indirect(priv, reg, MDIO_MMD_VEND2, val);
- mutex_unlock(&bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
}
static void
core_rmw(struct mt7530_priv *priv, u32 reg, u32 mask, u32 set)
{
- struct mii_bus *bus = priv->bus;
u32 val;
- mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(priv);
val = core_read_mmd_indirect(priv, reg, MDIO_MMD_VEND2);
val &= ~mask;
val |= set;
core_write_mmd_indirect(priv, reg, MDIO_MMD_VEND2, val);
- mutex_unlock(&bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
}
static void
@@ -264,13 +273,11 @@ mt7530_mii_read(struct mt7530_priv *priv
static void
mt7530_write(struct mt7530_priv *priv, u32 reg, u32 val)
{
- struct mii_bus *bus = priv->bus;
-
- mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(priv);
mt7530_mii_write(priv, reg, val);
- mutex_unlock(&bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
}
static u32
@@ -282,14 +289,13 @@ _mt7530_unlocked_read(struct mt7530_dumm
static u32
_mt7530_read(struct mt7530_dummy_poll *p)
{
- struct mii_bus *bus = p->priv->bus;
u32 val;
- mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(p->priv);
val = mt7530_mii_read(p->priv, p->reg);
- mutex_unlock(&bus->mdio_lock);
+ mt7530_mutex_unlock(p->priv);
return val;
}
@@ -307,13 +313,11 @@ static void
mt7530_rmw(struct mt7530_priv *priv, u32 reg,
u32 mask, u32 set)
{
- struct mii_bus *bus = priv->bus;
-
- mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(priv);
regmap_update_bits(priv->regmap, reg, mask, set);
- mutex_unlock(&bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
}
static void
@@ -645,14 +649,13 @@ static int
mt7531_ind_c45_phy_read(struct mt7530_priv *priv, int port, int devad,
int regnum)
{
- struct mii_bus *bus = priv->bus;
struct mt7530_dummy_poll p;
u32 reg, val;
int ret;
INIT_MT7530_DUMMY_POLL(&p, priv, MT7531_PHY_IAC);
- mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(priv);
ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val,
!(val & MT7531_PHY_ACS_ST), 20, 100000);
@@ -685,7 +688,7 @@ mt7531_ind_c45_phy_read(struct mt7530_pr
ret = val & MT7531_MDIO_RW_DATA_MASK;
out:
- mutex_unlock(&bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
return ret;
}
@@ -694,14 +697,13 @@ static int
mt7531_ind_c45_phy_write(struct mt7530_priv *priv, int port, int devad,
int regnum, u32 data)
{
- struct mii_bus *bus = priv->bus;
struct mt7530_dummy_poll p;
u32 val, reg;
int ret;
INIT_MT7530_DUMMY_POLL(&p, priv, MT7531_PHY_IAC);
- mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(priv);
ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val,
!(val & MT7531_PHY_ACS_ST), 20, 100000);
@@ -733,7 +735,7 @@ mt7531_ind_c45_phy_write(struct mt7530_p
}
out:
- mutex_unlock(&bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
return ret;
}
@@ -741,14 +743,13 @@ out:
static int
mt7531_ind_c22_phy_read(struct mt7530_priv *priv, int port, int regnum)
{
- struct mii_bus *bus = priv->bus;
struct mt7530_dummy_poll p;
int ret;
u32 val;
INIT_MT7530_DUMMY_POLL(&p, priv, MT7531_PHY_IAC);
- mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(priv);
ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val,
!(val & MT7531_PHY_ACS_ST), 20, 100000);
@@ -771,7 +772,7 @@ mt7531_ind_c22_phy_read(struct mt7530_pr
ret = val & MT7531_MDIO_RW_DATA_MASK;
out:
- mutex_unlock(&bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
return ret;
}
@@ -780,14 +781,13 @@ static int
mt7531_ind_c22_phy_write(struct mt7530_priv *priv, int port, int regnum,
u16 data)
{
- struct mii_bus *bus = priv->bus;
struct mt7530_dummy_poll p;
int ret;
u32 reg;
INIT_MT7530_DUMMY_POLL(&p, priv, MT7531_PHY_IAC);
- mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(priv);
ret = readx_poll_timeout(_mt7530_unlocked_read, &p, reg,
!(reg & MT7531_PHY_ACS_ST), 20, 100000);
@@ -809,7 +809,7 @@ mt7531_ind_c22_phy_write(struct mt7530_p
}
out:
- mutex_unlock(&bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
return ret;
}
@@ -1161,7 +1161,6 @@ static int
mt7530_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
{
struct mt7530_priv *priv = ds->priv;
- struct mii_bus *bus = priv->bus;
int length;
u32 val;
@@ -1172,7 +1171,7 @@ mt7530_port_change_mtu(struct dsa_switch
if (!dsa_is_cpu_port(ds, port))
return 0;
- mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(priv);
val = mt7530_mii_read(priv, MT7530_GMACCR);
val &= ~MAX_RX_PKT_LEN_MASK;
@@ -1193,7 +1192,7 @@ mt7530_port_change_mtu(struct dsa_switch
mt7530_mii_write(priv, MT7530_GMACCR, val);
- mutex_unlock(&bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
return 0;
}
@@ -1994,10 +1993,10 @@ mt7530_irq_thread_fn(int irq, void *dev_
u32 val;
int p;
- mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(priv);
val = mt7530_mii_read(priv, MT7530_SYS_INT_STS);
mt7530_mii_write(priv, MT7530_SYS_INT_STS, val);
- mutex_unlock(&priv->bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
for (p = 0; p < MT7530_NUM_PHYS; p++) {
if (BIT(p) & val) {
@@ -2033,7 +2032,7 @@ mt7530_irq_bus_lock(struct irq_data *d)
{
struct mt7530_priv *priv = irq_data_get_irq_chip_data(d);
- mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
+ mt7530_mutex_lock(priv);
}
static void
@@ -2042,7 +2041,7 @@ mt7530_irq_bus_sync_unlock(struct irq_da
struct mt7530_priv *priv = irq_data_get_irq_chip_data(d);
mt7530_mii_write(priv, MT7530_SYS_INT_EN, priv->irq_enable);
- mutex_unlock(&priv->bus->mdio_lock);
+ mt7530_mutex_unlock(priv);
}
static struct irq_chip mt7530_irq_chip = {
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