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imx9_lpuart: use small lock in arch/arm(64)/src/imx9/imx9_lpuart.c

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reason:
We would like to replace the big lock with a small lock.

Signed-off-by: hujun5 <hujun5@xiaomi.com>
This commit is contained in:
hujun5 2024-12-19 20:58:40 +08:00 committed by Xiang Xiao
parent 0e162eeb7a
commit a8353eef51
2 changed files with 98 additions and 52 deletions
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75
arch/arm/src/imx9/imx9_lpuart.c
View file

@ -305,6 +305,7 @@ struct imx9_uart_s
const bool userts; /* input flow control (RTS) available */
const bool rs485mode; /* We are in RS485 (RTS on TX) mode */
const bool inviflow; /* Invert RTS sense */
spinlock_t lock; /* Spinlock */
uint32_t baud; /* Configured baud */
uint32_t ie; /* Saved enabled interrupts */
uint8_t irq; /* IRQ associated with this UART */
@ -627,6 +628,7 @@ static struct imx9_uart_s g_lpuart1priv =
.irq = IMX9_IRQ_LPUART1,
.parity = CONFIG_LPUART1_PARITY,
.bits = CONFIG_LPUART1_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART1_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART1_OFLOWCONTROL)
.usects = true,
@ -686,6 +688,7 @@ static struct imx9_uart_s g_lpuart2priv =
.irq = IMX9_IRQ_LPUART2,
.parity = CONFIG_LPUART2_PARITY,
.bits = CONFIG_LPUART2_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART2_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART2_OFLOWCONTROL)
.usects = true,
@ -745,6 +748,7 @@ static struct imx9_uart_s g_lpuart3priv =
.irq = IMX9_IRQ_LPUART3,
.parity = CONFIG_LPUART3_PARITY,
.bits = CONFIG_LPUART3_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART3_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART3_OFLOWCONTROL)
.usects = true,
@ -804,6 +808,7 @@ static struct imx9_uart_s g_lpuart4priv =
.irq = IMX9_IRQ_LPUART4,
.parity = CONFIG_LPUART4_PARITY,
.bits = CONFIG_LPUART4_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART4_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART4_OFLOWCONTROL)
.usects = true,
@ -863,6 +868,7 @@ static struct imx9_uart_s g_lpuart5priv =
.irq = IMX9_IRQ_LPUART5,
.parity = CONFIG_LPUART5_PARITY,
.bits = CONFIG_LPUART5_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART5_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART5_OFLOWCONTROL)
.usects = true,
@ -922,6 +928,7 @@ static struct imx9_uart_s g_lpuart6priv =
.irq = IMX9_IRQ_LPUART6,
.parity = CONFIG_LPUART6_PARITY,
.bits = CONFIG_LPUART6_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART6_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART6_OFLOWCONTROL)
.usects = true,
@ -981,6 +988,7 @@ static struct imx9_uart_s g_lpuart7priv =
.irq = IMX9_IRQ_LPUART7,
.parity = CONFIG_LPUART7_PARITY,
.bits = CONFIG_LPUART7_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART7_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART7_OFLOWCONTROL)
.usects = true,
@ -1040,6 +1048,7 @@ static struct imx9_uart_s g_lpuart8priv =
.irq = IMX9_IRQ_LPUART8,
.parity = CONFIG_LPUART8_PARITY,
.bits = CONFIG_LPUART8_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART8_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART8_OFLOWCONTROL)
.usects = true,
@ -1122,13 +1131,11 @@ static int imx9_dma_nextrx(struct imx9_uart_s *priv)
* Name: imx9_disableuartint
****************************************************************************/
static inline void imx9_disableuartint(struct imx9_uart_s *priv,
uint32_t *ie)
static inline void imx9_disableuartint_nolock(struct imx9_uart_s *priv,
uint32_t *ie)
{
irqstate_t flags;
uint32_t regval;
flags = spin_lock_irqsave(NULL);
regval = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
/* Return the current Rx and Tx interrupt state */
@ -1140,29 +1147,45 @@ static inline void imx9_disableuartint(struct imx9_uart_s *priv,
regval &= ~LPUART_ALL_INTS;
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
spin_unlock_irqrestore(NULL, flags);
}
static inline void imx9_disableuartint(struct imx9_uart_s *priv,
uint32_t *ie)
{
irqstate_t flags;
flags = spin_lock_irqsave(&priv->lock);
imx9_disableuartint_nolock(priv, ie);
spin_unlock_irqrestore(&priv->lock, flags);
}
/****************************************************************************
* Name: imx9_restoreuartint
****************************************************************************/
static inline void imx9_restoreuartint_nolock(struct imx9_uart_s *priv,
uint32_t ie)
{
uint32_t regval;
regval = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
regval &= ~LPUART_ALL_INTS;
regval |= ie;
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
}
static inline void imx9_restoreuartint(struct imx9_uart_s *priv,
uint32_t ie)
uint32_t ie)
{
irqstate_t flags;
uint32_t regval;
/* Enable/disable any interrupts that are currently disabled but should be
* enabled/disabled.
*/
flags = spin_lock_irqsave(NULL);
regval = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
regval &= ~LPUART_ALL_INTS;
regval |= ie;
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
spin_unlock_irqrestore(NULL, flags);
flags = spin_lock_irqsave(&priv->lock);
imx9_restoreuartint_nolock(priv, ie);
spin_unlock_irqrestore(&priv->lock, flags);
}
/****************************************************************************
@ -1759,15 +1782,15 @@ static int imx9_ioctl(struct file *filep, int cmd, unsigned long arg)
* implement TCSADRAIN / TCSAFLUSH
*/
flags = spin_lock_irqsave(NULL);
imx9_disableuartint(priv, &ie);
flags = spin_lock_irqsave(&priv->lock);
imx9_disableuartint_nolock(priv, &ie);
ret = dev->ops->setup(dev);
/* Restore the interrupt state */
imx9_restoreuartint(priv, ie);
imx9_restoreuartint_nolock(priv, ie);
priv->ie = ie;
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
}
break;
@ -1779,8 +1802,8 @@ static int imx9_ioctl(struct file *filep, int cmd, unsigned long arg)
uint32_t regval;
struct imx9_uart_s *priv = (struct imx9_uart_s *)dev;
flags = spin_lock_irqsave(NULL);
regval = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
flags = spin_lock_irqsave(&priv->lock);
regval = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
if ((arg & SER_SINGLEWIRE_ENABLED) != 0)
{
@ -1793,7 +1816,7 @@ static int imx9_ioctl(struct file *filep, int cmd, unsigned long arg)
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
break;
#endif
@ -1806,7 +1829,7 @@ static int imx9_ioctl(struct file *filep, int cmd, unsigned long arg)
uint32_t regval;
struct imx9_uart_s *priv = (struct imx9_uart_s *)dev;
flags = spin_lock_irqsave(NULL);
flags = spin_lock_irqsave(&priv->lock);
ctrl = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
stat = imx9_serialin(priv, IMX9_LPUART_STAT_OFFSET);
regval = ctrl;
@ -1845,7 +1868,7 @@ static int imx9_ioctl(struct file *filep, int cmd, unsigned long arg)
imx9_serialout(priv, IMX9_LPUART_STAT_OFFSET, stat);
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, ctrl);
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
break;
#endif
@ -1899,7 +1922,7 @@ static void imx9_rxint(struct uart_dev_s *dev, bool enable)
/* Enable interrupts for data available at Rx */
flags = spin_lock_irqsave(NULL);
flags = spin_lock_irqsave(&priv->lock);
if (enable)
{
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
@ -1915,7 +1938,7 @@ static void imx9_rxint(struct uart_dev_s *dev, bool enable)
regval &= ~LPUART_ALL_INTS;
regval |= priv->ie;
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
#endif
@ -2320,7 +2343,7 @@ static void imx9_txint(struct uart_dev_s *dev, bool enable)
/* Enable interrupt for TX complete */
flags = spin_lock_irqsave(NULL);
flags = spin_lock_irqsave(&priv->lock);
if (enable)
{
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
@ -2336,7 +2359,7 @@ static void imx9_txint(struct uart_dev_s *dev, bool enable)
regval &= ~LPUART_ALL_INTS;
regval |= priv->ie;
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
#endif

75
arch/arm64/src/imx9/imx9_lpuart.c
View file

@ -304,6 +304,7 @@ struct imx9_uart_s
const bool userts; /* input flow control (RTS) available */
const bool rs485mode; /* We are in RS485 (RTS on TX) mode */
const bool inviflow; /* Invert RTS sense */
spinlock_t lock; /* Spinlock */
uint32_t baud; /* Configured baud */
uint32_t ie; /* Saved enabled interrupts */
uint8_t irq; /* IRQ associated with this UART */
@ -626,6 +627,7 @@ static struct imx9_uart_s g_lpuart1priv =
.irq = IMX9_IRQ_LPUART1,
.parity = CONFIG_LPUART1_PARITY,
.bits = CONFIG_LPUART1_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART1_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART1_OFLOWCONTROL)
.usects = true,
@ -685,6 +687,7 @@ static struct imx9_uart_s g_lpuart2priv =
.irq = IMX9_IRQ_LPUART2,
.parity = CONFIG_LPUART2_PARITY,
.bits = CONFIG_LPUART2_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART2_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART2_OFLOWCONTROL)
.usects = true,
@ -744,6 +747,7 @@ static struct imx9_uart_s g_lpuart3priv =
.irq = IMX9_IRQ_LPUART3,
.parity = CONFIG_LPUART3_PARITY,
.bits = CONFIG_LPUART3_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART3_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART3_OFLOWCONTROL)
.usects = true,
@ -803,6 +807,7 @@ static struct imx9_uart_s g_lpuart4priv =
.irq = IMX9_IRQ_LPUART4,
.parity = CONFIG_LPUART4_PARITY,
.bits = CONFIG_LPUART4_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART4_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART4_OFLOWCONTROL)
.usects = true,
@ -862,6 +867,7 @@ static struct imx9_uart_s g_lpuart5priv =
.irq = IMX9_IRQ_LPUART5,
.parity = CONFIG_LPUART5_PARITY,
.bits = CONFIG_LPUART5_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART5_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART5_OFLOWCONTROL)
.usects = true,
@ -921,6 +927,7 @@ static struct imx9_uart_s g_lpuart6priv =
.irq = IMX9_IRQ_LPUART6,
.parity = CONFIG_LPUART6_PARITY,
.bits = CONFIG_LPUART6_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART6_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART6_OFLOWCONTROL)
.usects = true,
@ -980,6 +987,7 @@ static struct imx9_uart_s g_lpuart7priv =
.irq = IMX9_IRQ_LPUART7,
.parity = CONFIG_LPUART7_PARITY,
.bits = CONFIG_LPUART7_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART7_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART7_OFLOWCONTROL)
.usects = true,
@ -1039,6 +1047,7 @@ static struct imx9_uart_s g_lpuart8priv =
.irq = IMX9_IRQ_LPUART8,
.parity = CONFIG_LPUART8_PARITY,
.bits = CONFIG_LPUART8_BITS,
.lock = SP_UNLOCKED,
.stopbits2 = CONFIG_LPUART8_2STOP,
# if defined(CONFIG_SERIAL_OFLOWCONTROL) && defined(CONFIG_LPUART8_OFLOWCONTROL)
.usects = true,
@ -1121,13 +1130,11 @@ static int imx9_dma_nextrx(struct imx9_uart_s *priv)
* Name: imx9_disableuartint
****************************************************************************/
static inline void imx9_disableuartint(struct imx9_uart_s *priv,
uint32_t *ie)
static inline void imx9_disableuartint_nolock(struct imx9_uart_s *priv,
uint32_t *ie)
{
irqstate_t flags;
uint32_t regval;
flags = spin_lock_irqsave(NULL);
regval = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
/* Return the current Rx and Tx interrupt state */
@ -1139,29 +1146,45 @@ static inline void imx9_disableuartint(struct imx9_uart_s *priv,
regval &= ~LPUART_ALL_INTS;
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
spin_unlock_irqrestore(NULL, flags);
}
static inline void imx9_disableuartint(struct imx9_uart_s *priv,
uint32_t *ie)
{
irqstate_t flags;
flags = spin_lock_irqsave(&priv->lock);
imx9_disableuartint_nolock(priv, ie);
spin_unlock_irqrestore(&priv->lock, flags);
}
/****************************************************************************
* Name: imx9_restoreuartint
****************************************************************************/
static inline void imx9_restoreuartint_nolock(struct imx9_uart_s *priv,
uint32_t ie)
{
uint32_t regval;
regval = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
regval &= ~LPUART_ALL_INTS;
regval |= ie;
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
}
static inline void imx9_restoreuartint(struct imx9_uart_s *priv,
uint32_t ie)
uint32_t ie)
{
irqstate_t flags;
uint32_t regval;
/* Enable/disable any interrupts that are currently disabled but should be
* enabled/disabled.
*/
flags = spin_lock_irqsave(NULL);
regval = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
regval &= ~LPUART_ALL_INTS;
regval |= ie;
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
spin_unlock_irqrestore(NULL, flags);
flags = spin_lock_irqsave(&priv->lock);
imx9_restoreuartint_nolock(priv, ie);
spin_unlock_irqrestore(&priv->lock, flags);
}
/****************************************************************************
@ -1758,15 +1781,15 @@ static int imx9_ioctl(struct file *filep, int cmd, unsigned long arg)
* implement TCSADRAIN / TCSAFLUSH
*/
flags = spin_lock_irqsave(NULL);
imx9_disableuartint(priv, &ie);
flags = spin_lock_irqsave(&priv->lock);
imx9_disableuartint_nolock(priv, &ie);
ret = dev->ops->setup(dev);
/* Restore the interrupt state */
imx9_restoreuartint(priv, ie);
imx9_restoreuartint_nolock(priv, ie);
priv->ie = ie;
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
}
break;
@ -1778,8 +1801,8 @@ static int imx9_ioctl(struct file *filep, int cmd, unsigned long arg)
uint32_t regval;
struct imx9_uart_s *priv = (struct imx9_uart_s *)dev;
flags = spin_lock_irqsave(NULL);
regval = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
flags = spin_lock_irqsave(&priv->lock);
regval = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
if ((arg & SER_SINGLEWIRE_ENABLED) != 0)
{
@ -1792,7 +1815,7 @@ static int imx9_ioctl(struct file *filep, int cmd, unsigned long arg)
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
break;
#endif
@ -1805,7 +1828,7 @@ static int imx9_ioctl(struct file *filep, int cmd, unsigned long arg)
uint32_t regval;
struct imx9_uart_s *priv = (struct imx9_uart_s *)dev;
flags = spin_lock_irqsave(NULL);
flags = spin_lock_irqsave(&priv->lock);
ctrl = imx9_serialin(priv, IMX9_LPUART_CTRL_OFFSET);
stat = imx9_serialin(priv, IMX9_LPUART_STAT_OFFSET);
regval = ctrl;
@ -1844,7 +1867,7 @@ static int imx9_ioctl(struct file *filep, int cmd, unsigned long arg)
imx9_serialout(priv, IMX9_LPUART_STAT_OFFSET, stat);
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, ctrl);
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
break;
#endif
@ -1898,7 +1921,7 @@ static void imx9_rxint(struct uart_dev_s *dev, bool enable)
/* Enable interrupts for data available at Rx */
flags = spin_lock_irqsave(NULL);
flags = spin_lock_irqsave(&priv->lock);
if (enable)
{
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
@ -1914,7 +1937,7 @@ static void imx9_rxint(struct uart_dev_s *dev, bool enable)
regval &= ~LPUART_ALL_INTS;
regval |= priv->ie;
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
#endif
@ -2319,7 +2342,7 @@ static void imx9_txint(struct uart_dev_s *dev, bool enable)
/* Enable interrupt for TX complete */
flags = spin_lock_irqsave(NULL);
flags = spin_lock_irqsave(&priv->lock);
if (enable)
{
#ifndef CONFIG_SUPPRESS_SERIAL_INTS
@ -2335,7 +2358,7 @@ static void imx9_txint(struct uart_dev_s *dev, bool enable)
regval &= ~LPUART_ALL_INTS;
regval |= priv->ie;
imx9_serialout(priv, IMX9_LPUART_CTRL_OFFSET, regval);
spin_unlock_irqrestore(NULL, flags);
spin_unlock_irqrestore(&priv->lock, flags);
}
#endif