[PATCH v2 5/6] serial: Use UART_XMIT

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* [PATCH v2 5/6] serial: Use UART_XMIT_SIZE
       [not found] <20220621124958.3342-1-ilpo.jarvinen@linux.intel.com>
@ 2022-06-21 12:49 ` Ilpo Järvinen
  2022-06-23  7:30   ` Jiri Slaby
  0 siblings, 1 reply; 3+ messages in thread
From: Ilpo Järvinen @ 2022-06-21 12:49 UTC (permalink / raw)
  To: linux-serial, Greg KH, Jiri Slaby, Neil Armstrong, Kevin Hilman,
	Jerome Brunet, Martin Blumenstingl, Andreas Färber,
	Manivannan Sadhasivam, linux-kernel, linux-arm-kernel,
	linux-amlogic, linux-actions, linux-unisoc
  Cc: Ilpo Järvinen

Both UART_XMIT_SIZE and SERIAL_XMIT_SIZE are defined. Make them all
UART_XMIT_SIZE.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 drivers/tty/amiserial.c         | 18 +++++++++---------
 drivers/tty/mips_ejtag_fdc.c    |  2 +-
 drivers/tty/serial/meson_uart.c |  2 +-
 drivers/tty/serial/owl-uart.c   |  2 +-
 drivers/tty/serial/rda-uart.c   |  2 +-
 include/linux/serial.h          |  6 ------
 include/linux/serial_core.h     |  1 +
 7 files changed, 14 insertions(+), 19 deletions(-)

diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index afb2d373dd47..5458e2b1c125 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -51,6 +51,7 @@
 #include <linux/seq_file.h>
 #include <linux/serial.h>
 #include <linux/serial_reg.h>
+#include <linux/serial_core.h>
 #include <linux/sched.h>
 #include <linux/signal.h>
 #include <linux/slab.h>
@@ -283,12 +284,12 @@ static void transmit_chars(struct serial_state *info)
 
 	amiga_custom.serdat = info->xmit.buf[info->xmit.tail++] | 0x100;
 	mb();
-	info->xmit.tail = info->xmit.tail & (SERIAL_XMIT_SIZE-1);
+	info->xmit.tail = info->xmit.tail & (UART_XMIT_SIZE - 1);
 	info->icount.tx++;
 
 	if (CIRC_CNT(info->xmit.head,
 		     info->xmit.tail,
-		     SERIAL_XMIT_SIZE) < WAKEUP_CHARS)
+		     UART_XMIT_SIZE) < WAKEUP_CHARS)
 		tty_wakeup(info->tport.tty);
 
 #ifdef SERIAL_DEBUG_INTR
@@ -708,13 +709,13 @@ static int rs_put_char(struct tty_struct *tty, unsigned char ch)
 	local_irq_save(flags);
 	if (CIRC_SPACE(info->xmit.head,
 		       info->xmit.tail,
-		       SERIAL_XMIT_SIZE) == 0) {
+		       UART_XMIT_SIZE) == 0) {
 		local_irq_restore(flags);
 		return 0;
 	}
 
 	info->xmit.buf[info->xmit.head++] = ch;
-	info->xmit.head &= SERIAL_XMIT_SIZE-1;
+	info->xmit.head &= UART_XMIT_SIZE - 1;
 	local_irq_restore(flags);
 	return 1;
 }
@@ -753,15 +754,14 @@ static int rs_write(struct tty_struct * tty, const unsigned char *buf, int count
 	while (1) {
 		c = CIRC_SPACE_TO_END(info->xmit.head,
 				      info->xmit.tail,
-				      SERIAL_XMIT_SIZE);
+				      UART_XMIT_SIZE);
 		if (count < c)
 			c = count;
 		if (c <= 0) {
 			break;
 		}
 		memcpy(info->xmit.buf + info->xmit.head, buf, c);
-		info->xmit.head = ((info->xmit.head + c) &
-				   (SERIAL_XMIT_SIZE-1));
+		info->xmit.head = (info->xmit.head + c) & (UART_XMIT_SIZE - 1);
 		buf += c;
 		count -= c;
 		ret += c;
@@ -788,14 +788,14 @@ static unsigned int rs_write_room(struct tty_struct *tty)
 {
 	struct serial_state *info = tty->driver_data;
 
-	return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
+	return CIRC_SPACE(info->xmit.head, info->xmit.tail, UART_XMIT_SIZE);
 }
 
 static unsigned int rs_chars_in_buffer(struct tty_struct *tty)
 {
 	struct serial_state *info = tty->driver_data;
 
-	return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
+	return CIRC_CNT(info->xmit.head, info->xmit.tail, UART_XMIT_SIZE);
 }
 
 static void rs_flush_buffer(struct tty_struct *tty)
diff --git a/drivers/tty/mips_ejtag_fdc.c b/drivers/tty/mips_ejtag_fdc.c
index 49907427a165..e81701a66429 100644
--- a/drivers/tty/mips_ejtag_fdc.c
+++ b/drivers/tty/mips_ejtag_fdc.c
@@ -916,7 +916,7 @@ static int mips_ejtag_fdc_tty_probe(struct mips_cdmm_device *dev)
 	mips_ejtag_fdc_write(priv, REG_FDCFG, cfg);
 
 	/* Make each port's xmit FIFO big enough to fill FDC TX FIFO */
-	priv->xmit_size = min(tx_fifo * 4, (unsigned int)SERIAL_XMIT_SIZE);
+	priv->xmit_size = min(tx_fifo * 4, (unsigned int)UART_XMIT_SIZE);
 
 	driver = tty_alloc_driver(NUM_TTY_CHANNELS, TTY_DRIVER_REAL_RAW);
 	if (IS_ERR(driver))
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 4869c0059c98..6c8db19fd572 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -162,7 +162,7 @@ static void meson_uart_start_tx(struct uart_port *port)
 
 		ch = xmit->buf[xmit->tail];
 		writel(ch, port->membase + AML_UART_WFIFO);
-		xmit->tail = (xmit->tail+1) & (SERIAL_XMIT_SIZE - 1);
+		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
 		port->icount.tx++;
 	}
 
diff --git a/drivers/tty/serial/owl-uart.c b/drivers/tty/serial/owl-uart.c
index 44d20e5a7dd3..888e17e3f25f 100644
--- a/drivers/tty/serial/owl-uart.c
+++ b/drivers/tty/serial/owl-uart.c
@@ -201,7 +201,7 @@ static void owl_uart_send_chars(struct uart_port *port)
 
 		ch = xmit->buf[xmit->tail];
 		owl_uart_write(port, ch, OWL_UART_TXDAT);
-		xmit->tail = (xmit->tail + 1) & (SERIAL_XMIT_SIZE - 1);
+		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
 		port->icount.tx++;
 	}
 
diff --git a/drivers/tty/serial/rda-uart.c b/drivers/tty/serial/rda-uart.c
index f556b4955f59..feb2054aba37 100644
--- a/drivers/tty/serial/rda-uart.c
+++ b/drivers/tty/serial/rda-uart.c
@@ -353,7 +353,7 @@ static void rda_uart_send_chars(struct uart_port *port)
 
 		ch = xmit->buf[xmit->tail];
 		rda_uart_write(port, ch, RDA_UART_RXTX_BUFFER);
-		xmit->tail = (xmit->tail + 1) & (SERIAL_XMIT_SIZE - 1);
+		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
 		port->icount.tx++;
 	}
 
diff --git a/include/linux/serial.h b/include/linux/serial.h
index 0b8b7d7c8f33..70a9866e4abb 100644
--- a/include/linux/serial.h
+++ b/include/linux/serial.h
@@ -9,7 +9,6 @@
 #ifndef _LINUX_SERIAL_H
 #define _LINUX_SERIAL_H
 
-#include <asm/page.h>
 #include <uapi/linux/serial.h>
 
 /* Helper for dealing with UART_LCR_WLEN* defines */
@@ -25,11 +24,6 @@ struct async_icount {
 	__u32	buf_overrun;
 };
 
-/*
- * The size of the serial xmit buffer is 1 page, or 4096 bytes
- */
-#define SERIAL_XMIT_SIZE PAGE_SIZE
-
 #include <linux/compiler.h>
 
 #endif /* _LINUX_SERIAL_H */
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 5518b70177b3..1767dee98021 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -296,6 +296,7 @@ struct uart_state {
 	struct uart_port	*uart_port;
 };
 
+/* The size of the serial xmit buffer is 1 page, or 4096 bytes */
 #define UART_XMIT_SIZE	PAGE_SIZE
 
 
-- 
2.30.2


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^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH v2 5/6] serial: Use UART_XMIT_SIZE
  2022-06-21 12:49 ` [PATCH v2 5/6] serial: Use UART_XMIT_SIZE Ilpo Järvinen
@ 2022-06-23  7:30   ` Jiri Slaby
  2022-06-24 20:00     ` Ilpo Järvinen
  0 siblings, 1 reply; 3+ messages in thread
From: Jiri Slaby @ 2022-06-23  7:30 UTC (permalink / raw)
  To: Ilpo Järvinen, linux-serial, Greg KH, Neil Armstrong,
	Kevin Hilman, Jerome Brunet, Martin Blumenstingl,
	Andreas Färber, Manivannan Sadhasivam, linux-kernel,
	linux-arm-kernel, linux-amlogic, linux-actions, linux-unisoc

On 21. 06. 22, 14:49, Ilpo Järvinen wrote:
> --- a/include/linux/serial.h
> +++ b/include/linux/serial.h
> @@ -9,7 +9,6 @@
>   #ifndef _LINUX_SERIAL_H
>   #define _LINUX_SERIAL_H
>   
> -#include <asm/page.h>
>   #include <uapi/linux/serial.h>
>   
>   /* Helper for dealing with UART_LCR_WLEN* defines */
> @@ -25,11 +24,6 @@ struct async_icount {
>   	__u32	buf_overrun;
>   };
>   
> -/*
> - * The size of the serial xmit buffer is 1 page, or 4096 bytes
> - */
> -#define SERIAL_XMIT_SIZE PAGE_SIZE
> -
>   #include <linux/compiler.h>
>   
>   #endif /* _LINUX_SERIAL_H */
> diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
> index 5518b70177b3..1767dee98021 100644
> --- a/include/linux/serial_core.h
> +++ b/include/linux/serial_core.h
> @@ -296,6 +296,7 @@ struct uart_state {
>   	struct uart_port	*uart_port;
>   };
>   
> +/* The size of the serial xmit buffer is 1 page, or 4096 bytes */

That is not completely true, I'd remove the "or" part. Hmm, but then the 
comment is somehow superfluous as it says what we can see below. So 
maybe don't add it at all?

>   #define UART_XMIT_SIZE	PAGE_SIZE

thanks,
-- 
js
suse labs

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^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH v2 5/6] serial: Use UART_XMIT_SIZE
  2022-06-23  7:30   ` Jiri Slaby
@ 2022-06-24 20:00     ` Ilpo Järvinen
  0 siblings, 0 replies; 3+ messages in thread
From: Ilpo Järvinen @ 2022-06-24 20:00 UTC (permalink / raw)
  To: Jiri Slaby
  Cc: linux-serial, Greg KH, Neil Armstrong, Kevin Hilman,
	Jerome Brunet, Martin Blumenstingl, Andreas Färber,
	Manivannan Sadhasivam, LKML, linux-arm-kernel, linux-amlogic,
	linux-actions, linux-unisoc

[-- Attachment #1: Type: text/plain, Size: 1433 bytes --]

On Thu, 23 Jun 2022, Jiri Slaby wrote:

> On 21. 06. 22, 14:49, Ilpo Järvinen wrote:
> > --- a/include/linux/serial.h
> > +++ b/include/linux/serial.h
> > @@ -9,7 +9,6 @@
> >   #ifndef _LINUX_SERIAL_H
> >   #define _LINUX_SERIAL_H
> >   -#include <asm/page.h>
> >   #include <uapi/linux/serial.h>
> >     /* Helper for dealing with UART_LCR_WLEN* defines */
> > @@ -25,11 +24,6 @@ struct async_icount {
> >   	__u32	buf_overrun;
> >   };
> >   -/*
> > - * The size of the serial xmit buffer is 1 page, or 4096 bytes
> > - */
> > -#define SERIAL_XMIT_SIZE PAGE_SIZE
> > -
> >   #include <linux/compiler.h>
> >     #endif /* _LINUX_SERIAL_H */
> > diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
> > index 5518b70177b3..1767dee98021 100644
> > --- a/include/linux/serial_core.h
> > +++ b/include/linux/serial_core.h
> > @@ -296,6 +296,7 @@ struct uart_state {
> >   	struct uart_port	*uart_port;
> >   };
> >   +/* The size of the serial xmit buffer is 1 page, or 4096 bytes */
> 
> That is not completely true, I'd remove the "or" part. Hmm, but then the
> comment is somehow superfluous as it says what we can see below. So maybe
> don't add it at all?
> 
> >   #define UART_XMIT_SIZE	PAGE_SIZE

Yeah, the comment is probably not that useful. I managed to get into  
an "autopilot mode" with a sole goal to preserve the comment rather than 
thinking/reading it through whether it's worth preserving.

-- 
 i.

[-- Attachment #2: Type: text/plain, Size: 167 bytes --]

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^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2022-06-24 20:00 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <20220621124958.3342-1-ilpo.jarvinen@linux.intel.com>
2022-06-21 12:49 ` [PATCH v2 5/6] serial: Use UART_XMIT_SIZE Ilpo Järvinen
2022-06-23  7:30   ` Jiri Slaby
2022-06-24 20:00     ` Ilpo Järvinen

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