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Revert "net: fec: Use a spinlock to guard `fep->ptp_clk_on`" 

This reverts commit b353b241f1, this is
creating multiple issues, just not ready to be merged yet.

Link: https://lore.kernel.org/all/CAHk-=wj1obPoTu1AHj9Bd_BGYjdjDyPP+vT5WMj8eheb3A9WHw@mail.gmail.com/
Link: https://lore.kernel.org/all/20220907143915.5w65kainpykfobte@pengutronix.de/
Fixes: b353b241f1 ("net: fec: Use a spinlock to guard `fep->ptp_clk_on`")
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Francesco Dolcini 2022-09-12 09:01:43 +02:00 committed by Paolo Abeni
parent 7b15515fc1
commit 01b825f997
3 changed files with 27 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/freescale/fec.h
View File

@ -561,6 +561,7 @@ struct fec_enet_private {
struct clk *clk_2x_txclk;
bool ptp_clk_on;
struct mutex ptp_clk_mutex;
unsigned int num_tx_queues;
unsigned int num_rx_queues;

17
drivers/net/ethernet/freescale/fec_main.c
View File

@ -1995,7 +1995,6 @@ static void fec_enet_phy_reset_after_clk_enable(struct net_device *ndev)
static int fec_enet_clk_enable(struct net_device *ndev, bool enable)
{
struct fec_enet_private *fep = netdev_priv(ndev);
unsigned long flags;
int ret;
if (enable) {
@ -2004,15 +2003,15 @@ static int fec_enet_clk_enable(struct net_device *ndev, bool enable)
return ret;
if (fep->clk_ptp) {
spin_lock_irqsave(&fep->tmreg_lock, flags);
mutex_lock(&fep->ptp_clk_mutex);
ret = clk_prepare_enable(fep->clk_ptp);
if (ret) {
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
mutex_unlock(&fep->ptp_clk_mutex);
goto failed_clk_ptp;
} else {
fep->ptp_clk_on = true;
}
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
mutex_unlock(&fep->ptp_clk_mutex);
}
ret = clk_prepare_enable(fep->clk_ref);
@ -2027,10 +2026,10 @@ static int fec_enet_clk_enable(struct net_device *ndev, bool enable)
} else {
clk_disable_unprepare(fep->clk_enet_out);
if (fep->clk_ptp) {
spin_lock_irqsave(&fep->tmreg_lock, flags);
mutex_lock(&fep->ptp_clk_mutex);
clk_disable_unprepare(fep->clk_ptp);
fep->ptp_clk_on = false;
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
mutex_unlock(&fep->ptp_clk_mutex);
}
clk_disable_unprepare(fep->clk_ref);
clk_disable_unprepare(fep->clk_2x_txclk);
@ -2043,10 +2042,10 @@ failed_clk_2x_txclk:
clk_disable_unprepare(fep->clk_ref);
failed_clk_ref:
if (fep->clk_ptp) {
spin_lock_irqsave(&fep->tmreg_lock, flags);
mutex_lock(&fep->ptp_clk_mutex);
clk_disable_unprepare(fep->clk_ptp);
fep->ptp_clk_on = false;
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
mutex_unlock(&fep->ptp_clk_mutex);
}
failed_clk_ptp:
clk_disable_unprepare(fep->clk_enet_out);
@ -3881,7 +3880,7 @@ fec_probe(struct platform_device *pdev)
}
fep->ptp_clk_on = false;
spin_lock_init(&fep->tmreg_lock);
mutex_init(&fep->ptp_clk_mutex);
/* clk_ref is optional, depends on board */
fep->clk_ref = devm_clk_get_optional(&pdev->dev, "enet_clk_ref");

28
drivers/net/ethernet/freescale/fec_ptp.c
View File

@ -365,19 +365,21 @@ static int fec_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
*/
static int fec_ptp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
{
struct fec_enet_private *fep =
struct fec_enet_private *adapter =
container_of(ptp, struct fec_enet_private, ptp_caps);
u64 ns;
unsigned long flags;
spin_lock_irqsave(&fep->tmreg_lock, flags);
mutex_lock(&adapter->ptp_clk_mutex);
/* Check the ptp clock */
if (!fep->ptp_clk_on) {
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
if (!adapter->ptp_clk_on) {
mutex_unlock(&adapter->ptp_clk_mutex);
return -EINVAL;
}
ns = timecounter_read(&fep->tc);
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
spin_lock_irqsave(&adapter->tmreg_lock, flags);
ns = timecounter_read(&adapter->tc);
spin_unlock_irqrestore(&adapter->tmreg_lock, flags);
mutex_unlock(&adapter->ptp_clk_mutex);
*ts = ns_to_timespec64(ns);
@ -402,10 +404,10 @@ static int fec_ptp_settime(struct ptp_clock_info *ptp,
unsigned long flags;
u32 counter;
spin_lock_irqsave(&fep->tmreg_lock, flags);
mutex_lock(&fep->ptp_clk_mutex);
/* Check the ptp clock */
if (!fep->ptp_clk_on) {
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
mutex_unlock(&fep->ptp_clk_mutex);
return -EINVAL;
}
@ -415,9 +417,11 @@ static int fec_ptp_settime(struct ptp_clock_info *ptp,
*/
counter = ns & fep->cc.mask;
spin_lock_irqsave(&fep->tmreg_lock, flags);
writel(counter, fep->hwp + FEC_ATIME);
timecounter_init(&fep->tc, &fep->cc, ns);
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
mutex_unlock(&fep->ptp_clk_mutex);
return 0;
}
@ -514,11 +518,13 @@ static void fec_time_keep(struct work_struct *work)
struct fec_enet_private *fep = container_of(dwork, struct fec_enet_private, time_keep);
unsigned long flags;
spin_lock_irqsave(&fep->tmreg_lock, flags);
mutex_lock(&fep->ptp_clk_mutex);
if (fep->ptp_clk_on) {
spin_lock_irqsave(&fep->tmreg_lock, flags);
timecounter_read(&fep->tc);
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
}
spin_unlock_irqrestore(&fep->tmreg_lock, flags);
mutex_unlock(&fep->ptp_clk_mutex);
schedule_delayed_work(&fep->time_keep, HZ);
}
@ -593,6 +599,8 @@ void fec_ptp_init(struct platform_device *pdev, int irq_idx)
}
fep->ptp_inc = NSEC_PER_SEC / fep->cycle_speed;
spin_lock_init(&fep->tmreg_lock);
fec_ptp_start_cyclecounter(ndev);
INIT_DELAYED_WORK(&fep->time_keep, fec_time_keep);