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net: stmmac: provide stmmac_eee_tx_busy()

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Extract the code which checks whether there's still work to do on any
of the stmmac transmit queues. This will allow us to combine
stmmac_enable_eee_mode() with stmmac_try_to_start_sw_lpi() in the
next patch.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1tXItR-000MBO-GF@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Russell King (Oracle)
2025-01-13 11:46:05 +00:00
committed by Jakub Kicinski
parent 0cf44bd0c1
commit 82f2025dda
1 changed files with 16 additions and 8 deletions
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24
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@@ -400,13 +400,7 @@ static void stmmac_enable_hw_lpi_timer(struct stmmac_priv *priv)
stmmac_set_eee_lpi_timer(priv, priv->hw, priv->tx_lpi_timer);
}
/**
* stmmac_enable_eee_mode - check and enter in LPI mode
* @priv: driver private structure
* Description: this function is to verify and enter in LPI mode in case of
* EEE.
*/
static int stmmac_enable_eee_mode(struct stmmac_priv *priv)
static bool stmmac_eee_tx_busy(struct stmmac_priv *priv)
{
u32 tx_cnt = priv->plat->tx_queues_to_use;
u32 queue;
@@ -416,9 +410,23 @@ static int stmmac_enable_eee_mode(struct stmmac_priv *priv)
struct stmmac_tx_queue *tx_q = &priv->dma_conf.tx_queue[queue];
if (tx_q->dirty_tx != tx_q->cur_tx)
return -EBUSY; /* still unfinished work */
return true; /* still unfinished work */
}
return false;
}
/**
* stmmac_enable_eee_mode - check and enter in LPI mode
* @priv: driver private structure
* Description: this function is to verify and enter in LPI mode in case of
* EEE.
*/
static int stmmac_enable_eee_mode(struct stmmac_priv *priv)
{
if (stmmac_eee_tx_busy(priv))
return -EBUSY; /* still unfinished work */
/* Check and enter in LPI mode */
if (!priv->tx_path_in_lpi_mode)
stmmac_set_eee_mode(priv, priv->hw,