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This is a backport of Ansuel Smith's "Multiple improvement to qca8k stability" series. The QCA8337 switch is available on multiple platforms including ipq806x, ath79 and bcm53xx. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> Signed-off-by: Matthew Hagan <mnhagan88@gmail.com>
96 lines
2.9 KiB
Diff
96 lines
2.9 KiB
Diff
From b7ebac354d54f1657bb89b7a7ca149db50203e6a Mon Sep 17 00:00:00 2001
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From: Ansuel Smith <ansuelsmth@gmail.com>
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Date: Fri, 14 May 2021 23:00:12 +0200
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Subject: [PATCH] net: dsa: qca8k: improve internal mdio read/write bus access
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Improve the internal mdio read/write bus access by caching the value
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without accessing it for every read/write.
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Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/dsa/qca8k.c | 28 +++++++++++++++-------------
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1 file changed, 15 insertions(+), 13 deletions(-)
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--- a/drivers/net/dsa/qca8k.c
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+++ b/drivers/net/dsa/qca8k.c
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@@ -655,6 +655,7 @@ static int
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qca8k_mdio_write(struct mii_bus *salve_bus, int phy, int regnum, u16 data)
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{
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struct qca8k_priv *priv = salve_bus->priv;
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+ struct mii_bus *bus = priv->bus;
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u16 r1, r2, page;
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u32 val;
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int ret;
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@@ -669,22 +670,22 @@ qca8k_mdio_write(struct mii_bus *salve_b
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qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page);
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- mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
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+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
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- ret = qca8k_set_page(priv->bus, page);
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+ ret = qca8k_set_page(bus, page);
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if (ret)
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goto exit;
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- qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
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+ qca8k_mii_write32(bus, 0x10 | r2, r1, val);
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- ret = qca8k_mdio_busy_wait(priv->bus, QCA8K_MDIO_MASTER_CTRL,
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+ ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL,
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QCA8K_MDIO_MASTER_BUSY);
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exit:
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/* even if the busy_wait timeouts try to clear the MASTER_EN */
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- qca8k_mii_write32(priv->bus, 0x10 | r2, r1, 0);
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+ qca8k_mii_write32(bus, 0x10 | r2, r1, 0);
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- mutex_unlock(&priv->bus->mdio_lock);
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+ mutex_unlock(&bus->mdio_lock);
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return ret;
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}
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@@ -693,6 +694,7 @@ static int
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qca8k_mdio_read(struct mii_bus *salve_bus, int phy, int regnum)
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{
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struct qca8k_priv *priv = salve_bus->priv;
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+ struct mii_bus *bus = priv->bus;
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u16 r1, r2, page;
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u32 val;
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int ret;
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@@ -706,26 +708,26 @@ qca8k_mdio_read(struct mii_bus *salve_bu
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qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page);
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- mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
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+ mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
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- ret = qca8k_set_page(priv->bus, page);
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+ ret = qca8k_set_page(bus, page);
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if (ret)
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goto exit;
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- qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
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+ qca8k_mii_write32(bus, 0x10 | r2, r1, val);
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- ret = qca8k_mdio_busy_wait(priv->bus, QCA8K_MDIO_MASTER_CTRL,
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+ ret = qca8k_mdio_busy_wait(bus, QCA8K_MDIO_MASTER_CTRL,
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QCA8K_MDIO_MASTER_BUSY);
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if (ret)
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goto exit;
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- val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
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+ val = qca8k_mii_read32(bus, 0x10 | r2, r1);
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exit:
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/* even if the busy_wait timeouts try to clear the MASTER_EN */
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- qca8k_mii_write32(priv->bus, 0x10 | r2, r1, 0);
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+ qca8k_mii_write32(bus, 0x10 | r2, r1, 0);
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- mutex_unlock(&priv->bus->mdio_lock);
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+ mutex_unlock(&bus->mdio_lock);
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if (val >= 0)
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val &= QCA8K_MDIO_MASTER_DATA_MASK;
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