* [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA
@ 2022-11-22 10:21 Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 01/15] tty: serial: qcom-geni-serial: drop unneeded forward definitions Bartosz Golaszewski
` (14 more replies)
0 siblings, 15 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
The goal of this series is to update the qcom-geni-serial driver to use
the DMA mode of the QUPv3 serial engine. This is accomplished by the last
patch in the series. The previous ones contain either various tweaks,
reworks and refactoring or prepare the driver for adding DMA support.
More work will follow on the serial engine in order to reduce code
redundancy among its users and add support for SE DMA to the qcom GENI
SPI driver.
v1 -> v2:
- turn to_dev_uport() macro into a static inline function
- use CIRC_CNT_TO_END() and uart_xmit_advance() where applicable and don't
handle xmit->tail directly
- drop sizeof() where BYTES_PER_FIFO_WORD can be used
- further refactor qcom_geni_serial_handle_tx_fifo()
- collect review tags
Bartosz Golaszewski (15):
tty: serial: qcom-geni-serial: drop unneeded forward definitions
tty: serial: qcom-geni-serial: remove unused symbols
tty: serial: qcom-geni-serial: align #define values
tty: serial: qcom-geni-serial: improve the to_dev_port() macro
tty: serial: qcom-geni-serial: remove stray newlines
tty: serial: qcom-geni-serial: refactor qcom_geni_serial_isr()
tty: serial: qcom-geni-serial: remove unneeded tabs
tty: serial: qcom-geni-serial: refactor qcom_geni_serial_handle_tx()
tty: serial: qcom-geni-serial: drop the return value from handle_rx
tty: serial: qcom-geni-serial: use of_device_id data
tty: serial: qcom-geni-serial: stop operations in progress at shutdown
tty: serial: provide devm_uart_add_one_port()
tty: serial: qcom-geni-serial: use devres for uart port management
soc: qcom-geni-se: add more symbol definitions
tty: serial: qcom-geni-serial: add support for serial engine DMA
.../driver-api/driver-model/devres.rst | 3 +
drivers/tty/serial/qcom_geni_serial.c | 614 ++++++++++++------
drivers/tty/serial/serial_core.c | 36 +
include/linux/qcom-geni-se.h | 3 +
include/linux/serial_core.h | 6 +
5 files changed, 455 insertions(+), 207 deletions(-)
--
2.37.2
^ permalink raw reply [flat|nested] 18+ messages in thread
* [PATCH v2 01/15] tty: serial: qcom-geni-serial: drop unneeded forward definitions
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 02/15] tty: serial: qcom-geni-serial: remove unused symbols Bartosz Golaszewski
` (13 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
If we shuffle the code a bit, we can drop all forward definitions of
various static functions.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 79 +++++++++++++--------------
1 file changed, 37 insertions(+), 42 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 83b66b73303a..9f2212e7b5ec 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -147,11 +147,6 @@ static const struct uart_ops qcom_geni_console_pops;
static const struct uart_ops qcom_geni_uart_pops;
static struct uart_driver qcom_geni_console_driver;
static struct uart_driver qcom_geni_uart_driver;
-static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop);
-static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop);
-static unsigned int qcom_geni_serial_tx_empty(struct uart_port *port);
-static void qcom_geni_serial_stop_rx(struct uart_port *uport);
-static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop);
#define to_dev_port(ptr, member) \
container_of(ptr, struct qcom_geni_serial_port, member)
@@ -590,6 +585,11 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
return ret;
}
+static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport)
+{
+ return !readl(uport->membase + SE_GENI_TX_FIFO_STATUS);
+}
+
static void qcom_geni_serial_start_tx(struct uart_port *uport)
{
u32 irq_en;
@@ -635,25 +635,29 @@ static void qcom_geni_serial_stop_tx(struct uart_port *uport)
writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR);
}
-static void qcom_geni_serial_start_rx(struct uart_port *uport)
+static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop)
{
- u32 irq_en;
u32 status;
+ u32 word_cnt;
+ u32 last_word_byte_cnt;
+ u32 last_word_partial;
+ u32 total_bytes;
struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
- status = readl(uport->membase + SE_GENI_STATUS);
- if (status & S_GENI_CMD_ACTIVE)
- qcom_geni_serial_stop_rx(uport);
-
- geni_se_setup_s_cmd(&port->se, UART_START_READ, 0);
-
- irq_en = readl(uport->membase + SE_GENI_S_IRQ_EN);
- irq_en |= S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN;
- writel(irq_en, uport->membase + SE_GENI_S_IRQ_EN);
+ status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS);
+ word_cnt = status & RX_FIFO_WC_MSK;
+ last_word_partial = status & RX_LAST;
+ last_word_byte_cnt = (status & RX_LAST_BYTE_VALID_MSK) >>
+ RX_LAST_BYTE_VALID_SHFT;
- irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN);
- irq_en |= M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN;
- writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN);
+ if (!word_cnt)
+ return;
+ total_bytes = BYTES_PER_FIFO_WORD * (word_cnt - 1);
+ if (last_word_partial && last_word_byte_cnt)
+ total_bytes += last_word_byte_cnt;
+ else
+ total_bytes += BYTES_PER_FIFO_WORD;
+ port->handle_rx(uport, total_bytes, drop);
}
static void qcom_geni_serial_stop_rx(struct uart_port *uport)
@@ -694,29 +698,25 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport)
qcom_geni_serial_abort_rx(uport);
}
-static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop)
+static void qcom_geni_serial_start_rx(struct uart_port *uport)
{
+ u32 irq_en;
u32 status;
- u32 word_cnt;
- u32 last_word_byte_cnt;
- u32 last_word_partial;
- u32 total_bytes;
struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
- status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS);
- word_cnt = status & RX_FIFO_WC_MSK;
- last_word_partial = status & RX_LAST;
- last_word_byte_cnt = (status & RX_LAST_BYTE_VALID_MSK) >>
- RX_LAST_BYTE_VALID_SHFT;
+ status = readl(uport->membase + SE_GENI_STATUS);
+ if (status & S_GENI_CMD_ACTIVE)
+ qcom_geni_serial_stop_rx(uport);
- if (!word_cnt)
- return;
- total_bytes = BYTES_PER_FIFO_WORD * (word_cnt - 1);
- if (last_word_partial && last_word_byte_cnt)
- total_bytes += last_word_byte_cnt;
- else
- total_bytes += BYTES_PER_FIFO_WORD;
- port->handle_rx(uport, total_bytes, drop);
+ geni_se_setup_s_cmd(&port->se, UART_START_READ, 0);
+
+ irq_en = readl(uport->membase + SE_GENI_S_IRQ_EN);
+ irq_en |= S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN;
+ writel(irq_en, uport->membase + SE_GENI_S_IRQ_EN);
+
+ irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN);
+ irq_en |= M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN;
+ writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN);
}
static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done,
@@ -1122,11 +1122,6 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport,
qcom_geni_serial_start_rx(uport);
}
-static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport)
-{
- return !readl(uport->membase + SE_GENI_TX_FIFO_STATUS);
-}
-
#ifdef CONFIG_SERIAL_QCOM_GENI_CONSOLE
static int qcom_geni_console_setup(struct console *co, char *options)
{
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 02/15] tty: serial: qcom-geni-serial: remove unused symbols
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 01/15] tty: serial: qcom-geni-serial: drop unneeded forward definitions Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 03/15] tty: serial: qcom-geni-serial: align #define values Bartosz Golaszewski
` (12 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Drop all unused symbols from the driver.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 15 ---------------
1 file changed, 15 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 9f2212e7b5ec..7af5df6833c7 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -42,20 +42,11 @@
#define UART_TX_PAR_EN BIT(0)
#define UART_CTS_MASK BIT(1)
-/* SE_UART_TX_WORD_LEN */
-#define TX_WORD_LEN_MSK GENMASK(9, 0)
-
/* SE_UART_TX_STOP_BIT_LEN */
-#define TX_STOP_BIT_LEN_MSK GENMASK(23, 0)
#define TX_STOP_BIT_LEN_1 0
-#define TX_STOP_BIT_LEN_1_5 1
#define TX_STOP_BIT_LEN_2 2
-/* SE_UART_TX_TRANS_LEN */
-#define TX_TRANS_LEN_MSK GENMASK(23, 0)
-
/* SE_UART_RX_TRANS_CFG */
-#define UART_RX_INS_STATUS_BIT BIT(2)
#define UART_RX_PAR_EN BIT(3)
/* SE_UART_RX_WORD_LEN */
@@ -66,12 +57,9 @@
/* SE_UART_TX_PARITY_CFG/RX_PARITY_CFG */
#define PAR_CALC_EN BIT(0)
-#define PAR_MODE_MSK GENMASK(2, 1)
-#define PAR_MODE_SHFT 1
#define PAR_EVEN 0x00
#define PAR_ODD 0x01
#define PAR_SPACE 0x10
-#define PAR_MARK 0x11
/* SE_UART_MANUAL_RFR register fields */
#define UART_MANUAL_RFR_EN BIT(31)
@@ -80,11 +68,8 @@
/* UART M_CMD OP codes */
#define UART_START_TX 0x1
-#define UART_START_BREAK 0x4
-#define UART_STOP_BREAK 0x5
/* UART S_CMD OP codes */
#define UART_START_READ 0x1
-#define UART_PARAM 0x1
#define UART_OVERSAMPLING 32
#define STALE_TIMEOUT 16
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 03/15] tty: serial: qcom-geni-serial: align #define values
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 01/15] tty: serial: qcom-geni-serial: drop unneeded forward definitions Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 02/15] tty: serial: qcom-geni-serial: remove unused symbols Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 04/15] tty: serial: qcom-geni-serial: improve the to_dev_port() macro Bartosz Golaszewski
` (11 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Keep the #define symbols aligned for better readability.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 62 +++++++++++++--------------
1 file changed, 31 insertions(+), 31 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 7af5df6833c7..97ee7c074b79 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -39,57 +39,57 @@
#define SE_UART_MANUAL_RFR 0x2ac
/* SE_UART_TRANS_CFG */
-#define UART_TX_PAR_EN BIT(0)
-#define UART_CTS_MASK BIT(1)
+#define UART_TX_PAR_EN BIT(0)
+#define UART_CTS_MASK BIT(1)
/* SE_UART_TX_STOP_BIT_LEN */
-#define TX_STOP_BIT_LEN_1 0
-#define TX_STOP_BIT_LEN_2 2
+#define TX_STOP_BIT_LEN_1 0
+#define TX_STOP_BIT_LEN_2 2
/* SE_UART_RX_TRANS_CFG */
-#define UART_RX_PAR_EN BIT(3)
+#define UART_RX_PAR_EN BIT(3)
/* SE_UART_RX_WORD_LEN */
-#define RX_WORD_LEN_MASK GENMASK(9, 0)
+#define RX_WORD_LEN_MASK GENMASK(9, 0)
/* SE_UART_RX_STALE_CNT */
-#define RX_STALE_CNT GENMASK(23, 0)
+#define RX_STALE_CNT GENMASK(23, 0)
/* SE_UART_TX_PARITY_CFG/RX_PARITY_CFG */
-#define PAR_CALC_EN BIT(0)
-#define PAR_EVEN 0x00
-#define PAR_ODD 0x01
-#define PAR_SPACE 0x10
+#define PAR_CALC_EN BIT(0)
+#define PAR_EVEN 0x00
+#define PAR_ODD 0x01
+#define PAR_SPACE 0x10
/* SE_UART_MANUAL_RFR register fields */
-#define UART_MANUAL_RFR_EN BIT(31)
-#define UART_RFR_NOT_READY BIT(1)
-#define UART_RFR_READY BIT(0)
+#define UART_MANUAL_RFR_EN BIT(31)
+#define UART_RFR_NOT_READY BIT(1)
+#define UART_RFR_READY BIT(0)
/* UART M_CMD OP codes */
-#define UART_START_TX 0x1
+#define UART_START_TX 0x1
/* UART S_CMD OP codes */
-#define UART_START_READ 0x1
-
-#define UART_OVERSAMPLING 32
-#define STALE_TIMEOUT 16
-#define DEFAULT_BITS_PER_CHAR 10
-#define GENI_UART_CONS_PORTS 1
-#define GENI_UART_PORTS 3
-#define DEF_FIFO_DEPTH_WORDS 16
-#define DEF_TX_WM 2
-#define DEF_FIFO_WIDTH_BITS 32
-#define UART_RX_WM 2
+#define UART_START_READ 0x1
+
+#define UART_OVERSAMPLING 32
+#define STALE_TIMEOUT 16
+#define DEFAULT_BITS_PER_CHAR 10
+#define GENI_UART_CONS_PORTS 1
+#define GENI_UART_PORTS 3
+#define DEF_FIFO_DEPTH_WORDS 16
+#define DEF_TX_WM 2
+#define DEF_FIFO_WIDTH_BITS 32
+#define UART_RX_WM 2
/* SE_UART_LOOPBACK_CFG */
-#define RX_TX_SORTED BIT(0)
-#define CTS_RTS_SORTED BIT(1)
-#define RX_TX_CTS_RTS_SORTED (RX_TX_SORTED | CTS_RTS_SORTED)
+#define RX_TX_SORTED BIT(0)
+#define CTS_RTS_SORTED BIT(1)
+#define RX_TX_CTS_RTS_SORTED (RX_TX_SORTED | CTS_RTS_SORTED)
/* UART pin swap value */
-#define DEFAULT_IO_MACRO_IO0_IO1_MASK GENMASK(3, 0)
+#define DEFAULT_IO_MACRO_IO0_IO1_MASK GENMASK(3, 0)
#define IO_MACRO_IO0_SEL 0x3
-#define DEFAULT_IO_MACRO_IO2_IO3_MASK GENMASK(15, 4)
+#define DEFAULT_IO_MACRO_IO2_IO3_MASK GENMASK(15, 4)
#define IO_MACRO_IO2_IO3_SWAP 0x4640
/* We always configure 4 bytes per FIFO word */
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 04/15] tty: serial: qcom-geni-serial: improve the to_dev_port() macro
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (2 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 03/15] tty: serial: qcom-geni-serial: align #define values Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 05/15] tty: serial: qcom-geni-serial: remove stray newlines Bartosz Golaszewski
` (10 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
The member we want to resolve in struct qcom_geni_serial_port is called
uport so we don't need an additional redundant parameter in this macro.
While at it: turn the macro into a static inline function.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 36 ++++++++++++++-------------
1 file changed, 19 insertions(+), 17 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 97ee7c074b79..e4139718e084 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -133,8 +133,10 @@ static const struct uart_ops qcom_geni_uart_pops;
static struct uart_driver qcom_geni_console_driver;
static struct uart_driver qcom_geni_uart_driver;
-#define to_dev_port(ptr, member) \
- container_of(ptr, struct qcom_geni_serial_port, member)
+static inline struct qcom_geni_serial_port *to_dev_port(struct uart_port *uport)
+{
+ return container_of(uport, struct qcom_geni_serial_port, uport);
+}
static struct qcom_geni_serial_port qcom_geni_uart_ports[GENI_UART_PORTS] = {
[0] = {
@@ -175,7 +177,7 @@ static struct qcom_geni_serial_port qcom_geni_console_port = {
static int qcom_geni_serial_request_port(struct uart_port *uport)
{
struct platform_device *pdev = to_platform_device(uport->dev);
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
uport->membase = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(uport->membase))
@@ -212,7 +214,7 @@ static void qcom_geni_serial_set_mctrl(struct uart_port *uport,
unsigned int mctrl)
{
u32 uart_manual_rfr = 0;
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
if (uart_console(uport))
return;
@@ -253,7 +255,7 @@ static bool qcom_geni_serial_poll_bit(struct uart_port *uport,
struct qcom_geni_private_data *private_data = uport->private_data;
if (private_data->drv) {
- port = to_dev_port(uport, uport);
+ port = to_dev_port(uport);
baud = port->baud;
if (!baud)
baud = 115200;
@@ -506,7 +508,7 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
u32 i;
unsigned char buf[sizeof(u32)];
struct tty_port *tport;
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
tport = &uport->state->port;
for (i = 0; i < bytes; ) {
@@ -549,7 +551,7 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
{
struct tty_port *tport;
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
u32 num_bytes_pw = port->tx_fifo_width / BITS_PER_BYTE;
u32 words = ALIGN(bytes, num_bytes_pw) / num_bytes_pw;
int ret;
@@ -598,7 +600,7 @@ static void qcom_geni_serial_stop_tx(struct uart_port *uport)
{
u32 irq_en;
u32 status;
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN);
irq_en &= ~(M_CMD_DONE_EN | M_TX_FIFO_WATERMARK_EN);
@@ -627,7 +629,7 @@ static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop)
u32 last_word_byte_cnt;
u32 last_word_partial;
u32 total_bytes;
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS);
word_cnt = status & RX_FIFO_WC_MSK;
@@ -649,7 +651,7 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport)
{
u32 irq_en;
u32 status;
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
u32 s_irq_status;
irq_en = readl(uport->membase + SE_GENI_S_IRQ_EN);
@@ -687,7 +689,7 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport)
{
u32 irq_en;
u32 status;
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
status = readl(uport->membase + SE_GENI_STATUS);
if (status & S_GENI_CMD_ACTIVE)
@@ -707,7 +709,7 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport)
static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done,
bool active)
{
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
struct circ_buf *xmit = &uport->state->xmit;
size_t avail;
size_t remaining;
@@ -803,7 +805,7 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev)
struct uart_port *uport = dev;
bool drop_rx = false;
struct tty_port *tport = &uport->state->port;
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
if (uport->suspended)
return IRQ_NONE;
@@ -869,7 +871,7 @@ static void qcom_geni_serial_shutdown(struct uart_port *uport)
static int qcom_geni_serial_port_setup(struct uart_port *uport)
{
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
u32 rxstale = DEFAULT_BITS_PER_CHAR * STALE_TIMEOUT;
u32 proto;
u32 pin_swap;
@@ -917,7 +919,7 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport)
static int qcom_geni_serial_startup(struct uart_port *uport)
{
int ret;
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
if (!port->setup) {
ret = qcom_geni_serial_port_setup(uport);
@@ -1003,7 +1005,7 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport,
u32 stop_bit_len;
unsigned int clk_div;
u32 ser_clk_cfg;
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
unsigned long clk_rate;
u32 ver, sampling_rate;
unsigned int avg_bw_core;
@@ -1288,7 +1290,7 @@ static struct uart_driver qcom_geni_uart_driver = {
static void qcom_geni_serial_pm(struct uart_port *uport,
unsigned int new_state, unsigned int old_state)
{
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
/* If we've never been called, treat it as off */
if (old_state == UART_PM_STATE_UNDEFINED)
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 05/15] tty: serial: qcom-geni-serial: remove stray newlines
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (3 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 04/15] tty: serial: qcom-geni-serial: improve the to_dev_port() macro Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 06/15] tty: serial: qcom-geni-serial: refactor qcom_geni_serial_isr() Bartosz Golaszewski
` (9 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Remove stray newlines around #ifdefs for consistency with the rest
of the driver code.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index e4139718e084..ec2523736e99 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -320,7 +320,6 @@ static void qcom_geni_serial_abort_rx(struct uart_port *uport)
}
#ifdef CONFIG_CONSOLE_POLL
-
static int qcom_geni_serial_get_char(struct uart_port *uport)
{
struct qcom_geni_private_data *private_data = uport->private_data;
@@ -545,7 +544,6 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
{
return -EPERM;
}
-
#endif /* CONFIG_SERIAL_QCOM_GENI_CONSOLE */
static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 06/15] tty: serial: qcom-geni-serial: refactor qcom_geni_serial_isr()
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (4 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 05/15] tty: serial: qcom-geni-serial: remove stray newlines Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 07/15] tty: serial: qcom-geni-serial: remove unneeded tabs Bartosz Golaszewski
` (8 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Simplify the conditions in qcom_geni_serial_isr() and fix indentation.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
drivers/tty/serial/qcom_geni_serial.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index ec2523736e99..fba02f71a874 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -827,20 +827,18 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev)
if (m_irq_status & m_irq_en & (M_TX_FIFO_WATERMARK_EN | M_CMD_DONE_EN))
qcom_geni_serial_handle_tx(uport, m_irq_status & M_CMD_DONE_EN,
- geni_status & M_GENI_CMD_ACTIVE);
+ geni_status & M_GENI_CMD_ACTIVE);
- if (s_irq_status & S_GP_IRQ_0_EN || s_irq_status & S_GP_IRQ_1_EN) {
+ if (s_irq_status & (S_GP_IRQ_0_EN | S_GP_IRQ_1_EN)) {
if (s_irq_status & S_GP_IRQ_0_EN)
uport->icount.parity++;
drop_rx = true;
- } else if (s_irq_status & S_GP_IRQ_2_EN ||
- s_irq_status & S_GP_IRQ_3_EN) {
+ } else if (s_irq_status & (S_GP_IRQ_2_EN | S_GP_IRQ_3_EN)) {
uport->icount.brk++;
port->brk = true;
}
- if (s_irq_status & S_RX_FIFO_WATERMARK_EN ||
- s_irq_status & S_RX_FIFO_LAST_EN)
+ if (s_irq_status & (S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN))
qcom_geni_serial_handle_rx(uport, drop_rx);
out_unlock:
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 07/15] tty: serial: qcom-geni-serial: remove unneeded tabs
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (5 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 06/15] tty: serial: qcom-geni-serial: refactor qcom_geni_serial_isr() Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 08/15] tty: serial: qcom-geni-serial: refactor qcom_geni_serial_handle_tx() Bartosz Golaszewski
` (7 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Remove redundant indentation in struct member assignment.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index fba02f71a874..68a1402fbe58 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -141,26 +141,26 @@ static inline struct qcom_geni_serial_port *to_dev_port(struct uart_port *uport)
static struct qcom_geni_serial_port qcom_geni_uart_ports[GENI_UART_PORTS] = {
[0] = {
.uport = {
- .iotype = UPIO_MEM,
- .ops = &qcom_geni_uart_pops,
- .flags = UPF_BOOT_AUTOCONF,
- .line = 0,
+ .iotype = UPIO_MEM,
+ .ops = &qcom_geni_uart_pops,
+ .flags = UPF_BOOT_AUTOCONF,
+ .line = 0,
},
},
[1] = {
.uport = {
- .iotype = UPIO_MEM,
- .ops = &qcom_geni_uart_pops,
- .flags = UPF_BOOT_AUTOCONF,
- .line = 1,
+ .iotype = UPIO_MEM,
+ .ops = &qcom_geni_uart_pops,
+ .flags = UPF_BOOT_AUTOCONF,
+ .line = 1,
},
},
[2] = {
.uport = {
- .iotype = UPIO_MEM,
- .ops = &qcom_geni_uart_pops,
- .flags = UPF_BOOT_AUTOCONF,
- .line = 2,
+ .iotype = UPIO_MEM,
+ .ops = &qcom_geni_uart_pops,
+ .flags = UPF_BOOT_AUTOCONF,
+ .line = 2,
},
},
};
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 08/15] tty: serial: qcom-geni-serial: refactor qcom_geni_serial_handle_tx()
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (6 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 07/15] tty: serial: qcom-geni-serial: remove unneeded tabs Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 09/15] tty: serial: qcom-geni-serial: drop the return value from handle_rx Bartosz Golaszewski
` (6 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
qcom_geni_serial_handle_tx() is pretty big, let's move the code that
handles the actual writing of data to a separate function which makes
sense in preparation for introducing a dma variant of handle_tx().
Let's also shuffle the code a bit, drop unneeded variables and use
uart_xmit_advance() instead of handling tail->xmit manually.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 54 +++++++++++++--------------
1 file changed, 27 insertions(+), 27 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 68a1402fbe58..658b6d596f58 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -704,19 +704,42 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport)
writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN);
}
+static void qcom_geni_serial_send_chunk_fifo(struct uart_port *uport,
+ unsigned int chunk)
+{
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
+ struct circ_buf *xmit = &uport->state->xmit;
+ u8 buf[BYTES_PER_FIFO_WORD];
+ size_t remaining = chunk;
+ unsigned int tx_bytes;
+ int c;
+
+ while (remaining) {
+ memset(buf, 0, sizeof(buf));
+ tx_bytes = min_t(size_t, remaining, BYTES_PER_FIFO_WORD);
+
+ for (c = 0; c < tx_bytes ; c++) {
+ buf[c] = xmit->buf[xmit->tail];
+ uart_xmit_advance(uport, 1);
+ }
+
+ iowrite32_rep(uport->membase + SE_GENI_TX_FIFOn, buf, 1);
+
+ remaining -= tx_bytes;
+ port->tx_remaining -= tx_bytes;
+ }
+}
+
static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done,
bool active)
{
struct qcom_geni_serial_port *port = to_dev_port(uport);
struct circ_buf *xmit = &uport->state->xmit;
size_t avail;
- size_t remaining;
size_t pending;
- int i;
u32 status;
u32 irq_en;
unsigned int chunk;
- int tail;
status = readl(uport->membase + SE_GENI_TX_FIFO_STATUS);
@@ -735,7 +758,6 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done,
avail = port->tx_fifo_depth - (status & TX_FIFO_WC);
avail *= BYTES_PER_FIFO_WORD;
- tail = xmit->tail;
chunk = min(avail, pending);
if (!chunk)
goto out_write_wakeup;
@@ -750,29 +772,7 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done,
uport->membase + SE_GENI_M_IRQ_EN);
}
- remaining = chunk;
- for (i = 0; i < chunk; ) {
- unsigned int tx_bytes;
- u8 buf[sizeof(u32)];
- int c;
-
- memset(buf, 0, sizeof(buf));
- tx_bytes = min_t(size_t, remaining, BYTES_PER_FIFO_WORD);
-
- for (c = 0; c < tx_bytes ; c++) {
- buf[c] = xmit->buf[tail++];
- tail &= UART_XMIT_SIZE - 1;
- }
-
- iowrite32_rep(uport->membase + SE_GENI_TX_FIFOn, buf, 1);
-
- i += tx_bytes;
- uport->icount.tx += tx_bytes;
- remaining -= tx_bytes;
- port->tx_remaining -= tx_bytes;
- }
-
- xmit->tail = tail;
+ qcom_geni_serial_send_chunk_fifo(uport, chunk);
/*
* The tx fifo watermark is level triggered and latched. Though we had
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 09/15] tty: serial: qcom-geni-serial: drop the return value from handle_rx
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (7 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 08/15] tty: serial: qcom-geni-serial: refactor qcom_geni_serial_handle_tx() Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 10/15] tty: serial: qcom-geni-serial: use of_device_id data Bartosz Golaszewski
` (5 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
The return value of the handle_rx() callback is never checked. Drop it.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 658b6d596f58..d5c343b06c23 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -114,7 +114,7 @@ struct qcom_geni_serial_port {
u32 tx_fifo_width;
u32 rx_fifo_depth;
bool setup;
- int (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
+ void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
unsigned int baud;
void *rx_fifo;
u32 loopback;
@@ -502,7 +502,7 @@ static void qcom_geni_serial_console_write(struct console *co, const char *s,
spin_unlock_irqrestore(&uport->lock, flags);
}
-static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
+static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
{
u32 i;
unsigned char buf[sizeof(u32)];
@@ -537,16 +537,15 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
}
if (!drop)
tty_flip_buffer_push(tport);
- return 0;
}
#else
-static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
+static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
{
- return -EPERM;
+
}
#endif /* CONFIG_SERIAL_QCOM_GENI_CONSOLE */
-static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
+static void handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
{
struct tty_port *tport;
struct qcom_geni_serial_port *port = to_dev_port(uport);
@@ -557,7 +556,7 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
tport = &uport->state->port;
ioread32_rep(uport->membase + SE_GENI_RX_FIFOn, port->rx_fifo, words);
if (drop)
- return 0;
+ return;
ret = tty_insert_flip_string(tport, port->rx_fifo, bytes);
if (ret != bytes) {
@@ -567,7 +566,6 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
}
uport->icount.rx += ret;
tty_flip_buffer_push(tport);
- return ret;
}
static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport)
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 10/15] tty: serial: qcom-geni-serial: use of_device_id data
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (8 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 09/15] tty: serial: qcom-geni-serial: drop the return value from handle_rx Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 11/15] tty: serial: qcom-geni-serial: stop operations in progress at shutdown Bartosz Golaszewski
` (4 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Instead of checking the device compatible in probe(), assign the
device-specific data to struct of_device_id. We'll use it later when
providing SE DMA support.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 46 ++++++++++++++++++++-------
1 file changed, 34 insertions(+), 12 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index d5c343b06c23..036231106321 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -95,6 +95,11 @@
/* We always configure 4 bytes per FIFO word */
#define BYTES_PER_FIFO_WORD 4
+struct qcom_geni_device_data {
+ bool console;
+ void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
+};
+
struct qcom_geni_private_data {
/* NOTE: earlycon port will have NULL here */
struct uart_driver *drv;
@@ -114,7 +119,6 @@ struct qcom_geni_serial_port {
u32 tx_fifo_width;
u32 rx_fifo_depth;
bool setup;
- void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
unsigned int baud;
void *rx_fifo;
u32 loopback;
@@ -126,6 +130,7 @@ struct qcom_geni_serial_port {
bool cts_rts_swap;
struct qcom_geni_private_data private_data;
+ const struct qcom_geni_device_data *dev_data;
};
static const struct uart_ops qcom_geni_console_pops;
@@ -640,7 +645,7 @@ static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop)
total_bytes += last_word_byte_cnt;
else
total_bytes += BYTES_PER_FIFO_WORD;
- port->handle_rx(uport, total_bytes, drop);
+ port->dev_data->handle_rx(uport, total_bytes, drop);
}
static void qcom_geni_serial_stop_rx(struct uart_port *uport)
@@ -1345,13 +1350,14 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
struct uart_port *uport;
struct resource *res;
int irq;
- bool console = false;
struct uart_driver *drv;
+ const struct qcom_geni_device_data *data;
- if (of_device_is_compatible(pdev->dev.of_node, "qcom,geni-debug-uart"))
- console = true;
+ data = of_device_get_match_data(&pdev->dev);
+ if (!data)
+ return -EINVAL;
- if (console) {
+ if (data->console) {
drv = &qcom_geni_console_driver;
line = of_alias_get_id(pdev->dev.of_node, "serial");
} else {
@@ -1361,7 +1367,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
line = of_alias_get_id(pdev->dev.of_node, "hsuart");
}
- port = get_port_from_line(line, console);
+ port = get_port_from_line(line, data->console);
if (IS_ERR(port)) {
dev_err(&pdev->dev, "Invalid line %d\n", line);
return PTR_ERR(port);
@@ -1373,6 +1379,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
return -ENODEV;
uport->dev = &pdev->dev;
+ port->dev_data = data;
port->se.dev = &pdev->dev;
port->se.wrapper = dev_get_drvdata(pdev->dev.parent);
port->se.clk = devm_clk_get(&pdev->dev, "se");
@@ -1391,7 +1398,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
port->rx_fifo_depth = DEF_FIFO_DEPTH_WORDS;
port->tx_fifo_width = DEF_FIFO_WIDTH_BITS;
- if (!console) {
+ if (!data->console) {
port->rx_fifo = devm_kcalloc(uport->dev,
port->rx_fifo_depth, sizeof(u32), GFP_KERNEL);
if (!port->rx_fifo)
@@ -1421,7 +1428,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
uport->irq = irq;
uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_QCOM_GENI_CONSOLE);
- if (!console)
+ if (!data->console)
port->wakeup_irq = platform_get_irq_optional(pdev, 1);
if (of_property_read_bool(pdev->dev.of_node, "rx-tx-swap"))
@@ -1443,7 +1450,6 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
port->private_data.drv = drv;
uport->private_data = &port->private_data;
platform_set_drvdata(pdev, port);
- port->handle_rx = console ? handle_rx_console : handle_rx_uart;
ret = uart_add_one_port(drv, uport);
if (ret)
@@ -1523,14 +1529,30 @@ static int __maybe_unused qcom_geni_serial_sys_resume(struct device *dev)
return ret;
}
+static const struct qcom_geni_device_data qcom_geni_console_data = {
+ .console = true,
+ .handle_rx = handle_rx_console,
+};
+
+static const struct qcom_geni_device_data qcom_geni_uart_data = {
+ .console = false,
+ .handle_rx = handle_rx_uart,
+};
+
static const struct dev_pm_ops qcom_geni_serial_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(qcom_geni_serial_sys_suspend,
qcom_geni_serial_sys_resume)
};
static const struct of_device_id qcom_geni_serial_match_table[] = {
- { .compatible = "qcom,geni-debug-uart", },
- { .compatible = "qcom,geni-uart", },
+ {
+ .compatible = "qcom,geni-debug-uart",
+ .data = &qcom_geni_console_data,
+ },
+ {
+ .compatible = "qcom,geni-uart",
+ .data = &qcom_geni_uart_data,
+ },
{}
};
MODULE_DEVICE_TABLE(of, qcom_geni_serial_match_table);
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 11/15] tty: serial: qcom-geni-serial: stop operations in progress at shutdown
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (9 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 10/15] tty: serial: qcom-geni-serial: use of_device_id data Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 12/15] tty: serial: provide devm_uart_add_one_port() Bartosz Golaszewski
` (3 subsequent siblings)
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
We don't stop transmissions in progress at shutdown. This is fine with
FIFO SE mode but with DMA it causes trouble so fix it now.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 036231106321..82242a40a95a 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -865,6 +865,9 @@ static void get_tx_fifo_size(struct qcom_geni_serial_port *port)
static void qcom_geni_serial_shutdown(struct uart_port *uport)
{
+ qcom_geni_serial_stop_tx(uport);
+ qcom_geni_serial_stop_rx(uport);
+
disable_irq(uport->irq);
}
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 12/15] tty: serial: provide devm_uart_add_one_port()
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (10 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 11/15] tty: serial: qcom-geni-serial: stop operations in progress at shutdown Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 16:58 ` Greg Kroah-Hartman
2022-11-22 10:21 ` [PATCH v2 13/15] tty: serial: qcom-geni-serial: use devres for uart port management Bartosz Golaszewski
` (2 subsequent siblings)
14 siblings, 1 reply; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Provide a devres variant of uart_add_one_port() that removes the managed
port at device detach.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
.../driver-api/driver-model/devres.rst | 3 ++
drivers/tty/serial/serial_core.c | 36 +++++++++++++++++++
include/linux/serial_core.h | 6 ++++
3 files changed, 45 insertions(+)
diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index 56082265e8e5..5d07a8c1eadb 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -436,6 +436,9 @@ RTC
SERDEV
devm_serdev_device_open()
+SERIAL
+ devm_uart_add_one_port()
+
SLAVE DMA ENGINE
devm_acpi_dma_controller_register()
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 179ee199df34..005190b279b3 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -3217,6 +3217,42 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
}
EXPORT_SYMBOL(uart_remove_one_port);
+struct uart_port_devres {
+ struct uart_driver *drv;
+ struct uart_port *port;
+};
+
+static void devm_uart_remove_one_port(struct device *dev, void *data)
+{
+ struct uart_port_devres *res = data;
+
+ uart_remove_one_port(res->drv, res->port);
+}
+
+int devm_uart_add_one_port(struct device *dev,
+ struct uart_driver *drv, struct uart_port *port)
+{
+ struct uart_port_devres *res;
+ int ret;
+
+ res = devres_alloc(devm_uart_remove_one_port, sizeof(*res), GFP_KERNEL);
+ if (!res)
+ return -1;
+
+ ret = uart_add_one_port(drv, port);
+ if (ret) {
+ devres_free(res);
+ return -1;
+ }
+
+ res->drv = drv;
+ res->port = port;
+ devres_add(dev, res);
+
+ return 0;
+}
+EXPORT_SYMBOL(devm_uart_add_one_port);
+
/**
* uart_match_port - are the two ports equivalent?
* @port1: first port
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index d657f2a42a7b..d0911f04706e 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -771,6 +771,12 @@ int uart_remove_one_port(struct uart_driver *reg, struct uart_port *port);
bool uart_match_port(const struct uart_port *port1,
const struct uart_port *port2);
+/*
+ * UART devres
+ */
+int devm_uart_add_one_port(struct device *dev,
+ struct uart_driver *drv, struct uart_port *port);
+
/*
* Power Management
*/
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 13/15] tty: serial: qcom-geni-serial: use devres for uart port management
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (11 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 12/15] tty: serial: provide devm_uart_add_one_port() Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 14/15] soc: qcom-geni-se: add more symbol definitions Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 15/15] tty: serial: qcom-geni-serial: add support for serial engine DMA Bartosz Golaszewski
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Shrink and simplify the probe() and remove() code by using the managed
variant of uart_add_one_port.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 82242a40a95a..53d09da0854a 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1454,7 +1454,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
uport->private_data = &port->private_data;
platform_set_drvdata(pdev, port);
- ret = uart_add_one_port(drv, uport);
+ ret = devm_uart_add_one_port(&pdev->dev, drv, uport);
if (ret)
return ret;
@@ -1463,7 +1463,6 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
IRQF_TRIGGER_HIGH, port->name, uport);
if (ret) {
dev_err(uport->dev, "Failed to get IRQ ret %d\n", ret);
- uart_remove_one_port(drv, uport);
return ret;
}
@@ -1480,7 +1479,6 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
port->wakeup_irq);
if (ret) {
device_init_wakeup(&pdev->dev, false);
- uart_remove_one_port(drv, uport);
return ret;
}
}
@@ -1490,12 +1488,8 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
static int qcom_geni_serial_remove(struct platform_device *pdev)
{
- struct qcom_geni_serial_port *port = platform_get_drvdata(pdev);
- struct uart_driver *drv = port->private_data.drv;
-
dev_pm_clear_wake_irq(&pdev->dev);
device_init_wakeup(&pdev->dev, false);
- uart_remove_one_port(drv, &port->uport);
return 0;
}
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 14/15] soc: qcom-geni-se: add more symbol definitions
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (12 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 13/15] tty: serial: qcom-geni-serial: use devres for uart port management Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 15/15] tty: serial: qcom-geni-serial: add support for serial engine DMA Bartosz Golaszewski
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski,
Konrad Dybcio
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
The following symbols will be used when adding support for SE DMA in
the qcom geni serial driver.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
include/linux/qcom-geni-se.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/linux/qcom-geni-se.h b/include/linux/qcom-geni-se.h
index f5672785c0c4..400213daa461 100644
--- a/include/linux/qcom-geni-se.h
+++ b/include/linux/qcom-geni-se.h
@@ -103,6 +103,7 @@ struct geni_se {
#define SE_DMA_TX_FSM_RST 0xc58
#define SE_DMA_RX_IRQ_STAT 0xd40
#define SE_DMA_RX_IRQ_CLR 0xd44
+#define SE_DMA_RX_LEN_IN 0xd54
#define SE_DMA_RX_FSM_RST 0xd58
#define SE_HW_PARAM_0 0xe24
#define SE_HW_PARAM_1 0xe28
@@ -235,6 +236,8 @@ struct geni_se {
#define RX_SBE BIT(2)
#define RX_RESET_DONE BIT(3)
#define RX_FLUSH_DONE BIT(4)
+#define RX_DMA_PARITY_ERR BIT(5)
+#define RX_DMA_BREAK GENMASK(8, 7)
#define RX_GENI_GP_IRQ GENMASK(10, 5)
#define RX_GENI_CANCEL_IRQ BIT(11)
#define RX_GENI_GP_IRQ_EXT GENMASK(13, 12)
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 15/15] tty: serial: qcom-geni-serial: add support for serial engine DMA
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
` (13 preceding siblings ...)
2022-11-22 10:21 ` [PATCH v2 14/15] soc: qcom-geni-se: add more symbol definitions Bartosz Golaszewski
@ 2022-11-22 10:21 ` Bartosz Golaszewski
14 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-22 10:21 UTC (permalink / raw)
To: Andy Gross, Bjorn Andersson, Konrad Dybcio, Greg Kroah-Hartman,
Jiri Slaby, Srinivas Kandagatla, Vinod Koul, Alex Elder,
Ilpo Järvinen
Cc: linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
The qcom-geni-serial driver currently only works in SE FIFO mode. This
limits the UART speed to around 180 kB/s. In order to achieve higher
speeds we need to use SE DMA mode.
Keep the console port working in FIFO mode but extend the code to use DMA
for the high-speed port.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 289 ++++++++++++++++++++++----
1 file changed, 247 insertions(+), 42 deletions(-)
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 53d09da0854a..4aab92be162b 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -70,6 +70,8 @@
#define UART_START_TX 0x1
/* UART S_CMD OP codes */
#define UART_START_READ 0x1
+#define UART_PARAM 0x1
+#define UART_PARAM_RFR_OPEN BIT(7)
#define UART_OVERSAMPLING 32
#define STALE_TIMEOUT 16
@@ -95,9 +97,11 @@
/* We always configure 4 bytes per FIFO word */
#define BYTES_PER_FIFO_WORD 4
+#define DMA_RX_BUF_SIZE 2048
+
struct qcom_geni_device_data {
bool console;
- void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
+ enum geni_se_xfer_mode mode;
};
struct qcom_geni_private_data {
@@ -118,9 +122,11 @@ struct qcom_geni_serial_port {
u32 tx_fifo_depth;
u32 tx_fifo_width;
u32 rx_fifo_depth;
+ dma_addr_t tx_dma_addr;
+ dma_addr_t rx_dma_addr;
bool setup;
unsigned int baud;
- void *rx_fifo;
+ void *rx_buf;
u32 loopback;
bool brk;
@@ -552,18 +558,11 @@ static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
static void handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
{
- struct tty_port *tport;
struct qcom_geni_serial_port *port = to_dev_port(uport);
- u32 num_bytes_pw = port->tx_fifo_width / BITS_PER_BYTE;
- u32 words = ALIGN(bytes, num_bytes_pw) / num_bytes_pw;
+ struct tty_port *tport = &uport->state->port;
int ret;
- tport = &uport->state->port;
- ioread32_rep(uport->membase + SE_GENI_RX_FIFOn, port->rx_fifo, words);
- if (drop)
- return;
-
- ret = tty_insert_flip_string(tport, port->rx_fifo, bytes);
+ ret = tty_insert_flip_string(tport, port->rx_buf, bytes);
if (ret != bytes) {
dev_err(uport->dev, "%s:Unable to push data ret %d_bytes %d\n",
__func__, ret, bytes);
@@ -578,7 +577,70 @@ static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport)
return !readl(uport->membase + SE_GENI_TX_FIFO_STATUS);
}
-static void qcom_geni_serial_start_tx(struct uart_port *uport)
+static void qcom_geni_serial_stop_tx_dma(struct uart_port *uport)
+{
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
+ bool done;
+ u32 status;
+ u32 m_irq_en;
+
+ status = readl(uport->membase + SE_GENI_STATUS);
+ if (!(status & M_GENI_CMD_ACTIVE))
+ return;
+
+ if (port->rx_dma_addr) {
+ geni_se_tx_dma_unprep(&port->se, port->tx_dma_addr,
+ port->tx_remaining);
+ port->tx_dma_addr = (dma_addr_t)NULL;
+ port->tx_remaining = 0;
+ }
+
+ m_irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN);
+ writel(m_irq_en, uport->membase + SE_GENI_M_IRQ_EN);
+ geni_se_cancel_m_cmd(&port->se);
+
+ done = qcom_geni_serial_poll_bit(uport, SE_GENI_S_IRQ_STATUS,
+ S_CMD_CANCEL_EN, true);
+ if (!done) {
+ geni_se_abort_m_cmd(&port->se);
+ qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS,
+ M_CMD_ABORT_EN, true);
+ writel(M_CMD_ABORT_EN, uport->membase + SE_GENI_M_IRQ_CLEAR);
+ }
+
+ writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR);
+}
+
+static void qcom_geni_serial_start_tx_dma(struct uart_port *uport)
+{
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
+ struct circ_buf *xmit = &uport->state->xmit;
+ unsigned int xmit_size;
+ int ret;
+
+ if (port->tx_dma_addr)
+ return;
+
+ xmit_size = uart_circ_chars_pending(xmit);
+ if (xmit_size < WAKEUP_CHARS)
+ uart_write_wakeup(uport);
+
+ xmit_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
+
+ qcom_geni_serial_setup_tx(uport, xmit_size);
+
+ ret = geni_se_tx_dma_prep(&port->se, &xmit->buf[xmit->tail],
+ xmit_size, &port->tx_dma_addr);
+ if (ret) {
+ dev_err(uport->dev, "unable to start TX SE DMA: %d\n", ret);
+ qcom_geni_serial_stop_tx_dma(uport);
+ return;
+ }
+
+ port->tx_remaining = xmit_size;
+}
+
+static void qcom_geni_serial_start_tx_fifo(struct uart_port *uport)
{
u32 irq_en;
u32 status;
@@ -597,7 +659,7 @@ static void qcom_geni_serial_start_tx(struct uart_port *uport)
writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN);
}
-static void qcom_geni_serial_stop_tx(struct uart_port *uport)
+static void qcom_geni_serial_stop_tx_fifo(struct uart_port *uport)
{
u32 irq_en;
u32 status;
@@ -623,14 +685,13 @@ static void qcom_geni_serial_stop_tx(struct uart_port *uport)
writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR);
}
-static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop)
+static void qcom_geni_serial_handle_rx_fifo(struct uart_port *uport, bool drop)
{
u32 status;
u32 word_cnt;
u32 last_word_byte_cnt;
u32 last_word_partial;
u32 total_bytes;
- struct qcom_geni_serial_port *port = to_dev_port(uport);
status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS);
word_cnt = status & RX_FIFO_WC_MSK;
@@ -645,10 +706,10 @@ static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop)
total_bytes += last_word_byte_cnt;
else
total_bytes += BYTES_PER_FIFO_WORD;
- port->dev_data->handle_rx(uport, total_bytes, drop);
+ handle_rx_console(uport, total_bytes, drop);
}
-static void qcom_geni_serial_stop_rx(struct uart_port *uport)
+static void qcom_geni_serial_stop_rx_fifo(struct uart_port *uport)
{
u32 irq_en;
u32 status;
@@ -678,7 +739,7 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport)
s_irq_status = readl(uport->membase + SE_GENI_S_IRQ_STATUS);
/* Flush the Rx buffer */
if (s_irq_status & S_RX_FIFO_LAST_EN)
- qcom_geni_serial_handle_rx(uport, true);
+ qcom_geni_serial_handle_rx_fifo(uport, true);
writel(s_irq_status, uport->membase + SE_GENI_S_IRQ_CLEAR);
status = readl(uport->membase + SE_GENI_STATUS);
@@ -686,7 +747,7 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport)
qcom_geni_serial_abort_rx(uport);
}
-static void qcom_geni_serial_start_rx(struct uart_port *uport)
+static void qcom_geni_serial_start_rx_fifo(struct uart_port *uport)
{
u32 irq_en;
u32 status;
@@ -694,7 +755,7 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport)
status = readl(uport->membase + SE_GENI_STATUS);
if (status & S_GENI_CMD_ACTIVE)
- qcom_geni_serial_stop_rx(uport);
+ qcom_geni_serial_stop_rx_fifo(uport);
geni_se_setup_s_cmd(&port->se, UART_START_READ, 0);
@@ -707,6 +768,101 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport)
writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN);
}
+static void qcom_geni_serial_stop_rx_dma(struct uart_port *uport)
+{
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
+ u32 status;
+
+ status = readl(uport->membase + SE_GENI_STATUS);
+ if (!(status & S_GENI_CMD_ACTIVE))
+ return;
+
+ geni_se_cancel_s_cmd(&port->se);
+ qcom_geni_serial_poll_bit(uport, SE_GENI_S_IRQ_STATUS,
+ S_CMD_CANCEL_EN, true);
+
+ status = readl(uport->membase + SE_GENI_STATUS);
+ if (status & S_GENI_CMD_ACTIVE)
+ qcom_geni_serial_abort_rx(uport);
+
+ if (port->rx_dma_addr) {
+ geni_se_rx_dma_unprep(&port->se, port->rx_dma_addr,
+ DMA_RX_BUF_SIZE);
+ port->rx_dma_addr = (dma_addr_t)NULL;
+ }
+}
+
+static void qcom_geni_serial_start_rx_dma(struct uart_port *uport)
+{
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
+ u32 status;
+ int ret;
+
+ status = readl(uport->membase + SE_GENI_STATUS);
+ if (status & S_GENI_CMD_ACTIVE)
+ qcom_geni_serial_stop_rx_dma(uport);
+
+ geni_se_setup_s_cmd(&port->se, UART_START_READ, UART_PARAM_RFR_OPEN);
+
+ ret = geni_se_rx_dma_prep(&port->se, port->rx_buf,
+ DMA_RX_BUF_SIZE,
+ &port->rx_dma_addr);
+ if (ret) {
+ dev_err(uport->dev, "unable to start RX SE DMA: %d\n", ret);
+ qcom_geni_serial_stop_rx_dma(uport);
+ }
+}
+
+static void qcom_geni_serial_handle_rx_dma(struct uart_port *uport, bool drop)
+{
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
+ u32 status;
+ u32 rx_in;
+ int ret;
+
+ status = readl(uport->membase + SE_GENI_STATUS);
+ if (!(status & S_GENI_CMD_ACTIVE))
+ return;
+
+ if (!port->rx_dma_addr)
+ return;
+
+ geni_se_rx_dma_unprep(&port->se, port->rx_dma_addr, DMA_RX_BUF_SIZE);
+ port->rx_dma_addr = (dma_addr_t)NULL;
+
+ rx_in = readl(uport->membase + SE_DMA_RX_LEN_IN);
+ if (!rx_in) {
+ dev_warn(uport->dev, "serial engine reports 0 RX bytes in!\n");
+ return;
+ }
+
+ if (!drop)
+ handle_rx_uart(uport, rx_in, drop);
+
+ ret = geni_se_rx_dma_prep(&port->se, port->rx_buf,
+ DMA_RX_BUF_SIZE,
+ &port->rx_dma_addr);
+ if (ret) {
+ dev_err(uport->dev, "unable to start RX SE DMA: %d\n", ret);
+ qcom_geni_serial_stop_rx_dma(uport);
+ }
+}
+
+static void qcom_geni_serial_start_rx(struct uart_port *uport)
+{
+ uport->ops->start_rx(uport);
+}
+
+static void qcom_geni_serial_stop_rx(struct uart_port *uport)
+{
+ uport->ops->stop_rx(uport);
+}
+
+static void qcom_geni_serial_stop_tx(struct uart_port *uport)
+{
+ uport->ops->stop_tx(uport);
+}
+
static void qcom_geni_serial_send_chunk_fifo(struct uart_port *uport,
unsigned int chunk)
{
@@ -733,8 +889,8 @@ static void qcom_geni_serial_send_chunk_fifo(struct uart_port *uport,
}
}
-static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done,
- bool active)
+static void qcom_geni_serial_handle_tx_fifo(struct uart_port *uport,
+ bool done, bool active)
{
struct qcom_geni_serial_port *port = to_dev_port(uport);
struct circ_buf *xmit = &uport->state->xmit;
@@ -754,7 +910,7 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done,
/* All data has been transmitted and acknowledged as received */
if (!pending && !status && done) {
- qcom_geni_serial_stop_tx(uport);
+ qcom_geni_serial_stop_tx_fifo(uport);
goto out_write_wakeup;
}
@@ -797,12 +953,32 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done,
uart_write_wakeup(uport);
}
+static void qcom_geni_serial_handle_tx_dma(struct uart_port *uport)
+{
+ struct qcom_geni_serial_port *port = to_dev_port(uport);
+ struct circ_buf *xmit = &uport->state->xmit;
+
+ uart_xmit_advance(uport, port->tx_remaining);
+ geni_se_tx_dma_unprep(&port->se, port->tx_dma_addr, port->tx_remaining);
+ port->tx_dma_addr = (dma_addr_t)NULL;
+ port->tx_remaining = 0;
+
+ if (!uart_circ_empty(xmit))
+ qcom_geni_serial_start_tx_dma(uport);
+
+ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ uart_write_wakeup(uport);
+}
+
static irqreturn_t qcom_geni_serial_isr(int isr, void *dev)
{
u32 m_irq_en;
u32 m_irq_status;
u32 s_irq_status;
u32 geni_status;
+ u32 dma;
+ u32 dma_tx_status;
+ u32 dma_rx_status;
struct uart_port *uport = dev;
bool drop_rx = false;
struct tty_port *tport = &uport->state->port;
@@ -815,10 +991,15 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev)
m_irq_status = readl(uport->membase + SE_GENI_M_IRQ_STATUS);
s_irq_status = readl(uport->membase + SE_GENI_S_IRQ_STATUS);
+ dma_tx_status = readl(uport->membase + SE_DMA_TX_IRQ_STAT);
+ dma_rx_status = readl(uport->membase + SE_DMA_RX_IRQ_STAT);
geni_status = readl(uport->membase + SE_GENI_STATUS);
+ dma = readl(uport->membase + SE_GENI_DMA_MODE_EN);
m_irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN);
writel(m_irq_status, uport->membase + SE_GENI_M_IRQ_CLEAR);
writel(s_irq_status, uport->membase + SE_GENI_S_IRQ_CLEAR);
+ writel(dma_tx_status, uport->membase + SE_DMA_TX_IRQ_CLR);
+ writel(dma_rx_status, uport->membase + SE_DMA_RX_IRQ_CLR);
if (WARN_ON(m_irq_status & M_ILLEGAL_CMD_EN))
goto out_unlock;
@@ -828,10 +1009,6 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev)
tty_insert_flip_char(tport, 0, TTY_OVERRUN);
}
- if (m_irq_status & m_irq_en & (M_TX_FIFO_WATERMARK_EN | M_CMD_DONE_EN))
- qcom_geni_serial_handle_tx(uport, m_irq_status & M_CMD_DONE_EN,
- geni_status & M_GENI_CMD_ACTIVE);
-
if (s_irq_status & (S_GP_IRQ_0_EN | S_GP_IRQ_1_EN)) {
if (s_irq_status & S_GP_IRQ_0_EN)
uport->icount.parity++;
@@ -841,8 +1018,35 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev)
port->brk = true;
}
- if (s_irq_status & (S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN))
- qcom_geni_serial_handle_rx(uport, drop_rx);
+ if (dma) {
+ if (dma_tx_status & TX_DMA_DONE)
+ qcom_geni_serial_handle_tx_dma(uport);
+
+ if (dma_rx_status) {
+ if (dma_rx_status & RX_RESET_DONE)
+ goto out_unlock;
+
+ if (dma_rx_status & RX_DMA_PARITY_ERR) {
+ uport->icount.parity++;
+ drop_rx = true;
+ }
+
+ if (dma_rx_status & RX_DMA_BREAK)
+ uport->icount.brk++;
+
+ if (dma_rx_status & (RX_DMA_DONE | RX_EOT))
+ qcom_geni_serial_handle_rx_dma(uport, drop_rx);
+ }
+ } else {
+ if (m_irq_status & m_irq_en &
+ (M_TX_FIFO_WATERMARK_EN | M_CMD_DONE_EN))
+ qcom_geni_serial_handle_tx_fifo(uport,
+ m_irq_status & M_CMD_DONE_EN,
+ geni_status & M_GENI_CMD_ACTIVE);
+
+ if (s_irq_status & (S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN))
+ qcom_geni_serial_handle_rx_fifo(uport, drop_rx);
+ }
out_unlock:
uart_unlock_and_check_sysrq(uport);
@@ -912,7 +1116,7 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport)
geni_se_config_packing(&port->se, BITS_PER_BYTE, BYTES_PER_FIFO_WORD,
false, true, true);
geni_se_init(&port->se, UART_RX_WM, port->rx_fifo_depth - 2);
- geni_se_select_mode(&port->se, GENI_SE_FIFO);
+ geni_se_select_mode(&port->se, port->dev_data->mode);
port->setup = true;
return 0;
@@ -1310,10 +1514,10 @@ static void qcom_geni_serial_pm(struct uart_port *uport,
static const struct uart_ops qcom_geni_console_pops = {
.tx_empty = qcom_geni_serial_tx_empty,
- .stop_tx = qcom_geni_serial_stop_tx,
- .start_tx = qcom_geni_serial_start_tx,
- .stop_rx = qcom_geni_serial_stop_rx,
- .start_rx = qcom_geni_serial_start_rx,
+ .stop_tx = qcom_geni_serial_stop_tx_fifo,
+ .start_tx = qcom_geni_serial_start_tx_fifo,
+ .stop_rx = qcom_geni_serial_stop_rx_fifo,
+ .start_rx = qcom_geni_serial_start_rx_fifo,
.set_termios = qcom_geni_serial_set_termios,
.startup = qcom_geni_serial_startup,
.request_port = qcom_geni_serial_request_port,
@@ -1331,9 +1535,10 @@ static const struct uart_ops qcom_geni_console_pops = {
static const struct uart_ops qcom_geni_uart_pops = {
.tx_empty = qcom_geni_serial_tx_empty,
- .stop_tx = qcom_geni_serial_stop_tx,
- .start_tx = qcom_geni_serial_start_tx,
- .stop_rx = qcom_geni_serial_stop_rx,
+ .stop_tx = qcom_geni_serial_stop_tx_dma,
+ .start_tx = qcom_geni_serial_start_tx_dma,
+ .start_rx = qcom_geni_serial_start_rx_dma,
+ .stop_rx = qcom_geni_serial_stop_rx_dma,
.set_termios = qcom_geni_serial_set_termios,
.startup = qcom_geni_serial_startup,
.request_port = qcom_geni_serial_request_port,
@@ -1402,9 +1607,9 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
port->tx_fifo_width = DEF_FIFO_WIDTH_BITS;
if (!data->console) {
- port->rx_fifo = devm_kcalloc(uport->dev,
- port->rx_fifo_depth, sizeof(u32), GFP_KERNEL);
- if (!port->rx_fifo)
+ port->rx_buf = devm_kzalloc(uport->dev,
+ DMA_RX_BUF_SIZE, GFP_KERNEL);
+ if (!port->rx_buf)
return -ENOMEM;
}
@@ -1528,12 +1733,12 @@ static int __maybe_unused qcom_geni_serial_sys_resume(struct device *dev)
static const struct qcom_geni_device_data qcom_geni_console_data = {
.console = true,
- .handle_rx = handle_rx_console,
+ .mode = GENI_SE_FIFO,
};
static const struct qcom_geni_device_data qcom_geni_uart_data = {
.console = false,
- .handle_rx = handle_rx_uart,
+ .mode = GENI_SE_DMA,
};
static const struct dev_pm_ops qcom_geni_serial_pm_ops = {
--
2.37.2
^ permalink raw reply related [flat|nested] 18+ messages in thread
* Re: [PATCH v2 12/15] tty: serial: provide devm_uart_add_one_port()
2022-11-22 10:21 ` [PATCH v2 12/15] tty: serial: provide devm_uart_add_one_port() Bartosz Golaszewski
@ 2022-11-22 16:58 ` Greg Kroah-Hartman
2022-11-23 15:30 ` Bartosz Golaszewski
0 siblings, 1 reply; 18+ messages in thread
From: Greg Kroah-Hartman @ 2022-11-22 16:58 UTC (permalink / raw)
To: Bartosz Golaszewski
Cc: Andy Gross, Bjorn Andersson, Konrad Dybcio, Jiri Slaby,
Srinivas Kandagatla, Vinod Koul, Alex Elder, Ilpo Järvinen,
linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski
On Tue, Nov 22, 2022 at 11:21:22AM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> Provide a devres variant of uart_add_one_port() that removes the managed
> port at device detach.
Ick, no, please let's keep devm away from the serial layer like this.
I would need a LOT of justification for why this is needed, not just one
driver that wants to use it, sorry.
Please do not make this part of the series for this driver, but do it
separately, later, if you still want it.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 12/15] tty: serial: provide devm_uart_add_one_port()
2022-11-22 16:58 ` Greg Kroah-Hartman
@ 2022-11-23 15:30 ` Bartosz Golaszewski
0 siblings, 0 replies; 18+ messages in thread
From: Bartosz Golaszewski @ 2022-11-23 15:30 UTC (permalink / raw)
To: Greg Kroah-Hartman
Cc: Andy Gross, Bjorn Andersson, Konrad Dybcio, Jiri Slaby,
Srinivas Kandagatla, Vinod Koul, Alex Elder, Ilpo Järvinen,
linux-kernel, linux-arm-msm, linux-serial, Bartosz Golaszewski
On Tue, Nov 22, 2022 at 5:58 PM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> On Tue, Nov 22, 2022 at 11:21:22AM +0100, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> >
> > Provide a devres variant of uart_add_one_port() that removes the managed
> > port at device detach.
>
> Ick, no, please let's keep devm away from the serial layer like this.
>
> I would need a LOT of justification for why this is needed, not just one
> driver that wants to use it, sorry.
>
> Please do not make this part of the series for this driver, but do it
> separately, later, if you still want it.
>
Hey Greg,
I sent out a v3 without devres changes.
It's not just one driver that would use it, rather: it would be the
first user and others could be converted later.
I was wondering if your reaction ("Ick, no") comes from the general
aversion to devres certain developers express? I'm asking because as a
matter of fact, I've been just recently going through the various
discussions about the supposed harm in using devres helpers and also
watched Laurent's presentation[1] from this year's Linux Plumbers.
While the issues described are real and easy to reproduce, I struggle
to understand how they're caused by devres and not by the driver model
in general. Specifically: the question that keeps popping up in my
head is: how are the use-after-free issues fixed by ditching devres in
favor of manually freeing resources in .remove()?
I'm not the only one to be asking that, for instance in this[2]
discussion Matti Vaittinen asked the same question and I can't find a
convincing answer in this thread. Instead there are some incorrect
statements, like claims that the order in which managed resources are
released is not guaranteed - it is: resources are released in reverse
(as they should).
It's true that devres_release_all() is called after the remove()
callback returns AND driver_sysfs_remove() is called so when replacing
kmalloc() with devm_kmalloc(), there is some functional change but
let's imagine the following patch:
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 3dda62503102..0046062828a3 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -527,7 +527,6 @@ static DEVICE_ATTR_RO(state_synced);
static void device_unbind_cleanup(struct device *dev)
{
- devres_release_all(dev);
arch_teardown_dma_ops(dev);
kfree(dev->dma_range_map);
dev->dma_range_map = NULL;
@@ -548,6 +547,8 @@ static void device_remove(struct device *dev)
dev->bus->remove(dev);
else if (dev->driver->remove)
dev->driver->remove(dev);
+
+ devres_release_all(dev);
}
static int call_driver_probe(struct device *dev, struct device_driver *drv)
This seems to work just fine when tested (and I would argue it would
be slightly more correct so I may send it as a separate patch). Now
the devres resources are freed in reverse order IMMEDIATELY after
.remove(). How would moving anything into .remove() fix the
use-after-free problem described?
We have the same use-after-free issue with the GPIO character device
and while we keep the struct device associated with it alive until the
last reference is dropped, the user-space can crash the kernel by
calling any of the GPIO ioctl()s once the device has been unbound. I'm
looking into subsystem-level solutions to that but devres has nothing
to do with that (I tested that with gpio-sim just to make sure).
Anyway, it's most likely a subject for a separate discussion. Just let
me know what kind of justification for devres other than "it lessens
the burden on developers to keep track of resources and simplifies
error paths" you'd like to see.
Best Regards,
Bartosz
[1] https://www.youtube.com/watch?v=kW8LHWlJPTU
[2] https://lore.kernel.org/lkml/cover.1660292316.git.mazziesaccount@gmail.com/T/
^ permalink raw reply related [flat|nested] 18+ messages in thread
end of thread, other threads:[~2022-11-23 15:31 UTC | newest]
Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-11-22 10:21 [PATCH v2 00/15] serial: qcom-geni-serial: implement support for SE DMA Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 01/15] tty: serial: qcom-geni-serial: drop unneeded forward definitions Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 02/15] tty: serial: qcom-geni-serial: remove unused symbols Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 03/15] tty: serial: qcom-geni-serial: align #define values Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 04/15] tty: serial: qcom-geni-serial: improve the to_dev_port() macro Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 05/15] tty: serial: qcom-geni-serial: remove stray newlines Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 06/15] tty: serial: qcom-geni-serial: refactor qcom_geni_serial_isr() Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 07/15] tty: serial: qcom-geni-serial: remove unneeded tabs Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 08/15] tty: serial: qcom-geni-serial: refactor qcom_geni_serial_handle_tx() Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 09/15] tty: serial: qcom-geni-serial: drop the return value from handle_rx Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 10/15] tty: serial: qcom-geni-serial: use of_device_id data Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 11/15] tty: serial: qcom-geni-serial: stop operations in progress at shutdown Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 12/15] tty: serial: provide devm_uart_add_one_port() Bartosz Golaszewski
2022-11-22 16:58 ` Greg Kroah-Hartman
2022-11-23 15:30 ` Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 13/15] tty: serial: qcom-geni-serial: use devres for uart port management Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 14/15] soc: qcom-geni-se: add more symbol definitions Bartosz Golaszewski
2022-11-22 10:21 ` [PATCH v2 15/15] tty: serial: qcom-geni-serial: add support for serial engine DMA Bartosz Golaszewski
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