On 25.11.2023 16:45:33, Srinivas Goud wrote:
> Add ethtool stats interface for reading FIFO 1bit/2bit ECC errors information.
>
> Signed-off-by: Srinivas Goud <srinivas.goud@xxxxxxx>
> ---
> Changes in v6:
> None
>
> Changes in v5:
> Address review comments
> Add get_strings and get_sset_count stats interface
> Use u64 stats helper function
>
> Changes in v4:
> None
>
> Changes in v3:
> None
>
> Changes in v2:
> Add ethtool stats interface
>
> drivers/net/can/xilinx_can.c | 54 ++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 54 insertions(+)
>
> diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
> index c8691a1..40c912b 100644
> --- a/drivers/net/can/xilinx_can.c
> +++ b/drivers/net/can/xilinx_can.c
> @@ -228,6 +228,7 @@ struct xcan_devtype_data {
> * @transceiver: Optional pointer to associated CAN transceiver
> * @rstc: Pointer to reset control
> * @ecc_enable: ECC enable flag
> + * @stats_lock: Lock for synchronizing ECC errors stats
> * @ecc_2bit_rxfifo_cnt: RXFIFO 2bit ECC count
> * @ecc_1bit_rxfifo_cnt: RXFIFO 1bit ECC count
> * @ecc_2bit_txolfifo_cnt: TXOLFIFO 2bit ECC count
> @@ -254,6 +255,7 @@ struct xcan_priv {
> struct phy *transceiver;
> struct reset_control *rstc;
> bool ecc_enable;
> + spinlock_t stats_lock; /* Lock for synchronizing ECC errors stats */
> u64_stats_t ecc_2bit_rxfifo_cnt;
> u64_stats_t ecc_1bit_rxfifo_cnt;
> u64_stats_t ecc_2bit_txolfifo_cnt;
> @@ -347,6 +349,12 @@ static const struct can_tdc_const xcan_tdc_const_canfd2 = {
> .tdcf_max = 0,
> };
>
> +static const char xcan_priv_flags_strings[][ETH_GSTRING_LEN] = {
> + "err-ecc-rx-2-bit", "err-ecc-rx-1-bit",
> + "err-ecc-txol-2-bit", "err-ecc-txol-1-bit",
> + "err-ecc-txtl-2-bit", "err-ecc-txtl-1-bit",
> +};
> +
> /**
> * xcan_write_reg_le - Write a value to the device register little endian
> * @priv: Driver private data structure
> @@ -1171,6 +1179,9 @@ static void xcan_err_interrupt(struct net_device *ndev, u32 isr)
>
> if (priv->ecc_enable && isr & XCAN_IXR_ECC_MASK) {
> u32 reg_rx_ecc, reg_txol_ecc, reg_txtl_ecc;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&priv->stats_lock, flags);
The register access doesn't have to be protected by the spinlock, only
when you touch priv->ecc_*cnt.
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Embedded Linux | https://www.pengutronix.de |
Vertretung Nürnberg | Phone: +49-5121-206917-129 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-9 |
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