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Message-ID: <868c8163-d776-4ff4-b516-3046c5db0fc0@oracle.com>
Date: Sat, 3 May 2025 14:59:31 +0530
From: ALOK TIWARI <alok.a.tiwari@...cle.com>
To: Parvathi Pudi <parvathi@...thit.com>, danishanwar@...com,
rogerq@...nel.org, andrew+netdev@...n.ch, davem@...emloft.net,
edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org, nm@...com,
ssantosh@...nel.org, tony@...mide.com, richardcochran@...il.com,
glaroque@...libre.com, schnelle@...ux.ibm.com, m-karicheri2@...com,
s.hauer@...gutronix.de, rdunlap@...radead.org, diogo.ivo@...mens.com,
basharath@...thit.com, horms@...nel.org, jacob.e.keller@...el.com,
m-malladi@...com, javier.carrasco.cruz@...il.com, afd@...com,
s-anna@...com
Cc: linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
pratheesh@...com, prajith@...com, vigneshr@...com, praneeth@...com,
srk@...com, rogerq@...com, krishna@...thit.com, pmohan@...thit.com,
mohan@...thit.com
Subject: Re: [PATCH net-next v6 05/11] net: ti: prueth: Adds ethtool support
for ICSSM PRUETH Driver
On 23-04-2025 12:53, Parvathi Pudi wrote:
> From: Roger Quadros <rogerq@...com>
>
> Changes for enabling ethtool support for the newly added PRU Ethernet
> interfaces. Extends the support for statistics collection from PRU internal
> memory and displays it in the user space. Along with statistics,
> enable/disable of features, configuring link speed etc.are now supported.
etc.are -> etc. are
>
> The firmware running on PRU maintains statistics in internal data memory.
> When requested ethtool collects all the statistics for the specified
> interface and displays it in the user space.
>
> --- a/drivers/net/ethernet/ti/Makefile
> +++ b/drivers/net/ethernet/ti/Makefile
> @@ -4,7 +4,7 @@
> #
>
[clip]
> +}
> +
> +static void icssm_emac_get_regs(struct net_device *ndev,
> + struct ethtool_regs *regs, void *p)
> +{
> + struct prueth_emac *emac = netdev_priv(ndev);
> + struct prueth *prueth = emac->prueth;
> +
> + regs->version = PRUETH_REG_DUMP_GET_VER(prueth);
> +}
> +
> +static const struct ethtool_rmon_hist_range icssm_emac_rmon_ranges[] = {
> + { 0, 64},
> + { 65, 127},
> + { 128, 255},
> + { 256, 511},
> + { 512, 1023},
> + { 1024, EMAC_MAX_PKTLEN},
> + {}
> +};
> +
> +static void
> +icssm_emac_get_rmon_stats(struct net_device *ndev,
> + struct ethtool_rmon_stats *rmon_stats,
> + const struct ethtool_rmon_hist_range **ranges)
> +{
> + struct prueth_emac *emac = netdev_priv(ndev);
> + struct port_statistics pstats;
> +
> + *ranges = icssm_emac_rmon_ranges;
> + icssm_emac_get_stats(emac, &pstats);
> +
> + rmon_stats->undersize_pkts = pstats.rx_undersized_frames;
> + rmon_stats->oversize_pkts = pstats.rx_oversized_frames;
remove extra ' ' before =
> +
> + rmon_stats->hist[0] = pstats.tx64byte;
> + rmon_stats->hist[1] = pstats.tx65_127byte;
> + rmon_stats->hist[2] = pstats.tx128_255byte;
> + rmon_stats->hist[3] = pstats.tx256_511byte;
> + rmon_stats->hist[4] = pstats.tx512_1023byte;
> +
> + rmon_stats->hist_tx[0] = pstats.rx64byte;
> + rmon_stats->hist_tx[1] = pstats.rx65_127byte;
> + rmon_stats->hist_tx[2] = pstats.rx128_255byte;
> + rmon_stats->hist_tx[3] = pstats.rx256_511byte;
> + rmon_stats->hist_tx[4] = pstats.rx1024byte;
> +}
> +
> +static void
> +icssm_emac_get_eth_mac_stats(struct net_device *ndev,
> + struct ethtool_eth_mac_stats *mac_stats)
> +{
> + struct prueth_emac *emac = netdev_priv(ndev);
> + struct port_statistics pstats;
> +
> + icssm_emac_get_stats(emac, &pstats);
> +
> + mac_stats->LateCollisions = pstats.late_coll;
> + mac_stats->SingleCollisionFrames = pstats.single_coll;
> + mac_stats->MultipleCollisionFrames = pstats.multi_coll;
> +}
> +
> +/* Ethtool support for EMAC adapter */
> +const struct ethtool_ops emac_ethtool_ops = {
> + .get_drvinfo = icssm_emac_get_drvinfo,
> + .get_link_ksettings = phy_ethtool_get_link_ksettings,
> + .set_link_ksettings = phy_ethtool_set_link_ksettings,
> + .get_link = ethtool_op_get_link,
> + .get_sset_count = icssm_emac_get_sset_count,
> + .get_strings = icssm_emac_get_strings,
> + .get_ethtool_stats = icssm_emac_get_ethtool_stats,
> + .get_regs = icssm_emac_get_regs,
> + .get_rmon_stats = icssm_emac_get_rmon_stats,
> + .get_eth_mac_stats = icssm_emac_get_eth_mac_stats,
> +};
> +EXPORT_SYMBOL_GPL(emac_ethtool_ops);
> diff --git a/drivers/net/ethernet/ti/icssm/icssm_prueth.c b/drivers/net/ethernet/ti/icssm/icssm_prueth.c
> index 7aae12383ad3..b37991b04dd1 100644
> --- a/drivers/net/ethernet/ti/icssm/icssm_prueth.c
> +++ b/drivers/net/ethernet/ti/icssm/icssm_prueth.c
> @@ -901,6 +901,8 @@ static int icssm_emac_ndo_open(struct net_device *ndev)
>
> icssm_prueth_emac_config(emac);
>
> + icssm_emac_set_stats(emac, &emac->stats);
> +
> ret = icssm_emac_set_boot_pru(emac, ndev);
> if (ret)
> return ret;
> @@ -952,6 +954,8 @@ static int icssm_emac_ndo_stop(struct net_device *ndev)
> /* stop the PRU */
> rproc_shutdown(emac->pru);
>
> + icssm_emac_get_stats(emac, &emac->stats);
> +
> /* free rx interrupts */
> free_irq(emac->rx_irq, ndev);
>
> @@ -1045,10 +1049,39 @@ static enum netdev_tx icssm_emac_ndo_start_xmit(struct sk_buff *skb,
> return ret;
> }
>
> +/**
> + * icssm_emac_ndo_get_stats64 - EMAC get statistics function
> + * @ndev: The EMAC network adapter
> + * @stats: rtnl_link_stats structure
> + *
> + * Called when system wants to get statistics from the device.
> + *
> + */
> +static void icssm_emac_ndo_get_stats64(struct net_device *ndev,
> + struct rtnl_link_stats64 *stats)
> +{
> + struct prueth_emac *emac = netdev_priv(ndev);
> + struct port_statistics pstats;
> +
> + icssm_emac_get_stats(emac, &pstats);
> +
> + stats->rx_packets = ndev->stats.rx_packets;
> + stats->rx_bytes = ndev->stats.rx_bytes;
> + stats->tx_packets = ndev->stats.tx_packets;
> + stats->tx_bytes = ndev->stats.tx_bytes;
> + stats->tx_errors = ndev->stats.tx_errors;
> + stats->tx_dropped = ndev->stats.tx_dropped;
> + stats->multicast = pstats.rx_mcast;
> +
> + stats->rx_over_errors = ndev->stats.rx_over_errors;
> + stats->rx_length_errors = ndev->stats.rx_length_errors;
remove extra ' ' before =
> +}
> +
> static const struct net_device_ops emac_netdev_ops = {
> .ndo_open = icssm_emac_ndo_open,
> .ndo_stop = icssm_emac_ndo_stop,
> .ndo_start_xmit = icssm_emac_ndo_start_xmit,
> + .ndo_get_stats64 = icssm_emac_ndo_get_stats64,
> };
>
> /* get emac_port corresponding to eth_node name */
> @@ -1177,6 +1210,7 @@ static int icssm_prueth_netdev_init(struct prueth *prueth,
> phy_remove_link_mode(emac->phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
>
> ndev->netdev_ops = &emac_netdev_ops;
> + ndev->ethtool_ops = &emac_ethtool_ops;
>
> return 0;
> free:
> diff --git a/drivers/net/ethernet/ti/icssm/icssm_prueth.h b/drivers/net/ethernet/ti/icssm/icssm_prueth.h
> index 3c70dc9c4be0..39ceed0e2d15 100644
> --- a/drivers/net/ethernet/ti/icssm/icssm_prueth.h
> +++ b/drivers/net/ethernet/ti/icssm/icssm_prueth.h
> @@ -27,6 +27,12 @@
> #define EMAC_MAX_FRM_SUPPORT (ETH_HLEN + VLAN_HLEN + ETH_DATA_LEN + \
> ICSSM_LRE_TAG_SIZE)
>
> +#define PRUETH_REG_DUMP_VER 1
> +
> +/* Encoding: 32-16: Reserved, 16-8: Reg dump version, 8-0: Ethertype */
remove extra ' ' after Ethertype
> +#define PRUETH_REG_DUMP_GET_VER(x) ((PRUETH_REG_DUMP_VER << 8) | \
> + ((x)->eth_type))
> +
> /* PRU Ethernet Type - Ethernet functionality (protocol
> * implemented) provided by the PRU firmware being loaded.
> */
> @@ -108,6 +114,119 @@ struct prueth_packet_info {
> bool timestamp;
> };
Thanks,
Alok
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