From: Marc Kleine-Budde <mkl@pengutronix.de>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, kuba@kernel.org, linux-can@vger.kernel.org,
kernel@pengutronix.de,
Markus Schneider-Pargmann <msp@baylibre.com>,
Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [PATCH net-next 32/39] can: m_can: Count TXE FIFO getidx in the driver
Date: Mon, 12 Dec 2022 12:30:38 +0100 [thread overview]
Message-ID: <20221212113045.222493-33-mkl@pengutronix.de> (raw)
In-Reply-To: <20221212113045.222493-1-mkl@pengutronix.de>
From: Markus Schneider-Pargmann <msp@baylibre.com>
The getindex simply increases by one for every iteration. There is no
need to get the current getidx every time from a register. Instead we
can just count and wrap if necessary.
Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Link: https://lore.kernel.org/all/20221206115728.1056014-5-msp@baylibre.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/m_can/m_can.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 045679af76a0..83d3a7f191bf 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -1030,15 +1030,13 @@ static int m_can_echo_tx_event(struct net_device *dev)
/* Get Tx Event fifo element count */
txe_count = FIELD_GET(TXEFS_EFFL_MASK, m_can_txefs);
+ fgi = FIELD_GET(TXEFS_EFGI_MASK, m_can_txefs);
/* Get and process all sent elements */
for (i = 0; i < txe_count; i++) {
u32 txe, timestamp = 0;
int err;
- /* retrieve get index */
- fgi = FIELD_GET(TXEFS_EFGI_MASK, m_can_read(cdev, M_CAN_TXEFS));
-
/* get message marker, timestamp */
err = m_can_txe_fifo_read(cdev, fgi, 4, &txe);
if (err) {
@@ -1052,6 +1050,7 @@ static int m_can_echo_tx_event(struct net_device *dev)
/* ack txe element */
m_can_write(cdev, M_CAN_TXEFA, FIELD_PREP(TXEFA_EFAI_MASK,
fgi));
+ fgi = (++fgi >= cdev->mcfg[MRAM_TXE].num ? 0 : fgi);
/* update stats */
m_can_tx_update_stats(cdev, msg_mark, timestamp);
--
2.35.1
next prev parent reply other threads:[~2022-12-12 11:32 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-12 11:30 [PATCH net-next 0/39] pull-request: can-next 2022-12-12 Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 01/39] can: kvaser_usb: kvaser_usb_set_bittiming(): fix redundant initialization warning for err Marc Kleine-Budde
2022-12-12 12:20 ` patchwork-bot+netdevbpf
2022-12-12 11:30 ` [PATCH net-next 02/39] can: kvaser_usb: kvaser_usb_set_{,data}bittiming(): remove empty lines in variable declaration Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 03/39] can: rcar_canfd: rcar_canfd_probe: Add struct rcar_canfd_hw_info to driver data Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 04/39] can: m_can: sort header inclusion alphabetically Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 05/39] can: rcar_canfd: Add max_channels to struct rcar_canfd_hw_info Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 06/39] can: rcar_canfd: Add shared_global_irqs " Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 07/39] can: rcar_canfd: Add postdiv " Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 08/39] can: rcar_canfd: Add multi_channel_irqs " Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 09/39] can: ctucanfd: Drop obsolete dependency on COMPILE_TEST Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 10/39] can: etas_es58x: sort the includes by alphabetic order Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 11/39] can: flexcan: add auto stop mode for IMX93 to support wakeup Marc Kleine-Budde
2022-12-13 2:22 ` Bough Chen
2022-12-13 8:11 ` Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 12/39] can: etas_es58x: add devlink support Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 13/39] dt-bindings: can: fsl,flexcan: add imx93 compatible Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 14/39] can: etas_es58x: add devlink port support Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 15/39] dt-bindings: can: renesas,rcar-canfd: Document RZ/Five SoC Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 16/39] USB: core: export usb_cache_string() Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 17/39] can: c_can: use devm_platform_get_and_ioremap_resource() Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 18/39] net: devlink: add DEVLINK_INFO_VERSION_GENERIC_FW_BOOTLOADER Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 19/39] can: etas_es58x: export product information through devlink_ops::info_get() Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 20/39] can: etas_es58x: remove es58x_get_product_info() Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 21/39] Documentation: devlink: add devlink documentation for the etas_es58x driver Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 22/39] can: ucan: use strscpy() to instead of strncpy() Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 23/39] net: af_can: remove useless parameter 'err' in 'can_rx_register()' Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 24/39] can: ucan: remove unused ucan_priv::intf Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 25/39] can: gs_usb: remove gs_can::iface Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 26/39] can: m_can: Call the RAM init directly from m_can_chip_config Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 27/39] can: raw: add support for SO_MARK Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 28/39] dt-bindings: can: renesas,rcar-canfd: Fix number of channels for R-Car V3U Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 29/39] can: m_can: Eliminate double read of TXFQS in tx_handler Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 30/39] can: m_can: Avoid reading irqstatus twice Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 31/39] can: m_can: Read register PSR only on error Marc Kleine-Budde
2022-12-12 11:30 ` Marc Kleine-Budde [this message]
2022-12-12 11:30 ` [PATCH net-next 33/39] can: m_can: Count read getindex in the driver Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 34/39] can: m_can: Batch acknowledge transmit events Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 35/39] can: m_can: Batch acknowledge rx fifo Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 36/39] can: tcan4x5x: Remove invalid write in clear_interrupts Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 37/39] can: tcan4x5x: Fix use of register error status mask Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 38/39] can: tcan4x5x: Fix register range of first two blocks Marc Kleine-Budde
2022-12-12 11:30 ` [PATCH net-next 39/39] can: tcan4x5x: Specify separate read/write ranges Marc Kleine-Budde
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