[Intel-wired-lan] [next-queue RFC 4/4] igc: Add support for exposing frame preemption stats registers
Murali Karicheri
m-karicheri2 at ti.com
Wed May 20 12:50:27 UTC 2020
Hi Vinicious,
On 5/15/20 9:29 PM, Vinicius Costa Gomes wrote:
> [WIP]
>
> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes at intel.com>
> ---
> drivers/net/ethernet/intel/igc/igc_ethtool.c | 9 +++++++++
> drivers/net/ethernet/intel/igc/igc_regs.h | 10 ++++++++++
> 2 files changed, 19 insertions(+)
>
> diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c b/drivers/net/ethernet/intel/igc/igc_ethtool.c
> index 48d5d18..09d72f7 100644
> --- a/drivers/net/ethernet/intel/igc/igc_ethtool.c
> +++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c
> @@ -322,6 +322,15 @@ static void igc_ethtool_get_regs(struct net_device *netdev,
>
> for (i = 0; i < 8; i++)
> regs_buff[205 + i] = rd32(IGC_ETQF(i));
> +
> + regs_buff[214] = rd32(IGC_PRMPTDTCNT);
> + regs_buff[215] = rd32(IGC_PRMEVNTTCNT);
> + regs_buff[216] = rd32(IGC_PRMPTDRCNT);
> + regs_buff[217] = rd32(IGC_PRMEVNTRCNT);
> + regs_buff[218] = rd32(IGC_PRMPBLTCNT);
> + regs_buff[219] = rd32(IGC_PRMPBLRCNT);
> + regs_buff[220] = rd32(IGC_PRMEXPTCNT);
> + regs_buff[221] = rd32(IGC_PRMEXPRCNT);
> }
>
> static void igc_ethtool_get_wol(struct net_device *netdev,
> diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h
> index 7f999cf..010bb48 100644
> --- a/drivers/net/ethernet/intel/igc/igc_regs.h
> +++ b/drivers/net/ethernet/intel/igc/igc_regs.h
> @@ -211,6 +211,16 @@
>
> #define IGC_FTQF(_n) (0x059E0 + (4 * (_n))) /* 5-tuple Queue Fltr */
>
> +/* Time sync registers - preemption statistics */
> +#define IGC_PRMPTDTCNT 0x04280 /* Good TX Preempted Packets */
> +#define IGC_PRMEVNTTCNT 0x04298 /* TX Preemption event counter */
> +#define IGC_PRMPTDRCNT 0x04284 /* Good RX Preempted Packets */
> +#define IGC_PRMEVNTRCNT 0x0429C /* RX Preemption event counter */
> +#define IGC_PRMPBLTCNT 0x04288 /* Good TX Preemptable Packets */
> +#define IGC_PRMPBLRCNT 0x0428C /* Good RX Preemptable Packets */
> +#define IGC_PRMEXPTCNT 0x04290 /* Good TX Express Packets */
> +#define IGC_PRMEXPRCNT 0x042A0 /* Preemption Exception Counter */
> +
> /* Transmit Scheduling Registers */
> #define IGC_TQAVCTRL 0x3570
> #define IGC_TXQCTL(_n) (0x3344 + 0x4 * (_n))
>
There are some statistics supported by AM65 CPSW as well. So do you plan
to add this to ethtool stats that is dumped using ethtool -S option?
Thanks and regards,
--
Murali Karicheri
Texas Instruments
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