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net: dsa: mt7530: introduce mutex helpers

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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>
This commit is contained in:
Daniel Golle 2023-04-03 02:18:16 +01:00 committed by David S. Miller
parent 6de2852297
commit 1557c679f7
1 changed files with 36 additions and 37 deletions
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73
drivers/net/dsa/mt7530.c
View File

@ -142,32 +142,41 @@ err:
return ret;
}
static void
mt7530_mutex_lock(struct mt7530_priv *priv)
{
mutex_lock_nested(&priv->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)
{
struct mii_bus *bus = priv->bus;
mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
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, u32 reg)
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_dummy_poll *p)
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
@ -657,14 +661,13 @@ 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);
@ -697,7 +700,7 @@ mt7531_ind_c45_phy_read(struct mt7530_priv *priv, int port, int devad,
ret = val & MT7531_MDIO_RW_DATA_MASK;
out:
mutex_unlock(&bus->mdio_lock);
mt7530_mutex_unlock(priv);
return ret;
}
@ -706,14 +709,13 @@ static int
mt7531_ind_c45_phy_write(struct mt7530_priv *priv, int port, int devad,
int regnum, u16 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);
@ -745,7 +747,7 @@ mt7531_ind_c45_phy_write(struct mt7530_priv *priv, int port, int devad,
}
out:
mutex_unlock(&bus->mdio_lock);
mt7530_mutex_unlock(priv);
return ret;
}
@ -753,14 +755,13 @@ 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);
@ -783,7 +784,7 @@ mt7531_ind_c22_phy_read(struct mt7530_priv *priv, int port, int regnum)
ret = val & MT7531_MDIO_RW_DATA_MASK;
out:
mutex_unlock(&bus->mdio_lock);
mt7530_mutex_unlock(priv);
return ret;
}
@ -792,14 +793,13 @@ 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);
@ -821,7 +821,7 @@ mt7531_ind_c22_phy_write(struct mt7530_priv *priv, int port, int regnum,
}
out:
mutex_unlock(&bus->mdio_lock);
mt7530_mutex_unlock(priv);
return ret;
}
@ -1102,7 +1102,6 @@ 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;
@ -1113,7 +1112,7 @@ mt7530_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
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;
@ -1134,7 +1133,7 @@ mt7530_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
mt7530_mii_write(priv, MT7530_GMACCR, val);
mutex_unlock(&bus->mdio_lock);
mt7530_mutex_unlock(priv);
return 0;
}
@ -1935,10 +1934,10 @@ mt7530_irq_thread_fn(int irq, void *dev_id)
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) {
@ -1974,7 +1973,7 @@ 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
@ -1983,7 +1982,7 @@ mt7530_irq_bus_sync_unlock(struct irq_data *d)
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 = {