From 91f8c04dd25f2eacbb9fd57db95b09313cdfd085 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Wed, 19 Feb 2025 16:23:30 +0100 Subject: [PATCH] hw/char/imx_serial: Really use RX FIFO depth MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit While we model a 32-elements RX FIFO since the IMX serial model was introduced in commit 988f2442971 ("hw/char/imx_serial: Implement receive FIFO and ageing timer") we only read 1 char at a time! Have the IOCanReadHandler handler return how many elements are available, and use that in the IOReadHandler handler. Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Luc Michel Reviewed-by: Richard Henderson Tested-by: Bernhard Beschow Message-Id: <20250220092903.3726-7-philmd@linaro.org> --- hw/char/imx_serial.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/hw/char/imx_serial.c b/hw/char/imx_serial.c index 38b4865157..6f14f8403a 100644 --- a/hw/char/imx_serial.c +++ b/hw/char/imx_serial.c @@ -386,7 +386,8 @@ static void imx_serial_write(void *opaque, hwaddr offset, static int imx_can_receive(void *opaque) { IMXSerialState *s = (IMXSerialState *)opaque; - return s->ucr2 & UCR2_RXEN && fifo32_num_used(&s->rx_fifo) < FIFO_SIZE; + + return s->ucr2 & UCR2_RXEN ? fifo32_num_free(&s->rx_fifo) : 0; } static void imx_put_data(void *opaque, uint32_t value) @@ -417,7 +418,10 @@ static void imx_receive(void *opaque, const uint8_t *buf, int size) IMXSerialState *s = (IMXSerialState *)opaque; s->usr2 |= USR2_WAKE; - imx_put_data(opaque, *buf); + + for (int i = 0; i < size; i++) { + imx_put_data(opaque, buf[i]); + } } static void imx_event(void *opaque, QEMUChrEvent event) -- 2.30.2