linux-kernel - Re: [PATCH v4 net-next 05/14] net: enetc: add debugfs interface to dump MAC filter

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Message-ID: <20250317144843.wp432pgodn4vjejf@skbuf>
Date: Mon, 17 Mar 2025 16:48:43 +0200
From: Vladimir Oltean <vladimir.oltean@....com>
To: Wei Fang <wei.fang@....com>
Cc: claudiu.manoil@....com, xiaoning.wang@....com, andrew+netdev@...n.ch,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, christophe.leroy@...roup.eu,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev, linuxppc-dev@...ts.ozlabs.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 net-next 05/14] net: enetc: add debugfs interface to
 dump MAC filter

On Tue, Mar 11, 2025 at 01:38:21PM +0800, Wei Fang wrote:
> diff --git a/drivers/net/ethernet/freescale/enetc/enetc4_debugfs.c b/drivers/net/ethernet/freescale/enetc/enetc4_debugfs.c
> new file mode 100644
> index 000000000000..3a660c80344a
> --- /dev/null
> +++ b/drivers/net/ethernet/freescale/enetc/enetc4_debugfs.c
> @@ -0,0 +1,93 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/* Copyright 2025 NXP */
> +
> +#include <linux/device.h>
> +#include <linux/debugfs.h>
> +#include <linux/seq_file.h>
> +
> +#include "enetc_pf.h"
> +#include "enetc4_debugfs.h"
> +
> +#define is_en(x)	(x) ? "Enabled" : "Disabled"

str_enabled_disabled()

> +
> +static void enetc_show_si_mac_hash_filter(struct seq_file *s, int i)
> +{
> +	struct enetc_si *si = s->private;
> +	struct enetc_hw *hw = &si->hw;
> +	u32 hash_h, hash_l;
> +
> +	hash_l = enetc_port_rd(hw, ENETC4_PSIUMHFR0(i));
> +	hash_h = enetc_port_rd(hw, ENETC4_PSIUMHFR1(i));
> +	seq_printf(s, "SI %d unicast MAC hash filter: 0x%08x%08x\n",
> +		   i, hash_h, hash_l);

Maybe the ":" separator between the high and low 32 bits is clearer than "x".

> +
> +	hash_l = enetc_port_rd(hw, ENETC4_PSIMMHFR0(i));
> +	hash_h = enetc_port_rd(hw, ENETC4_PSIMMHFR1(i));
> +	seq_printf(s, "SI %d multicast MAC hash filter: 0x%08x%08x\n",
> +		   i, hash_h, hash_l);
> +}
> +
> +static int enetc_mac_filter_show(struct seq_file *s, void *data)
> +{
> +	struct maft_entry_data maft_data;
> +	struct enetc_si *si = s->private;
> +	struct enetc_hw *hw = &si->hw;
> +	struct maft_keye_data *keye;
> +	struct enetc_pf *pf;
> +	int i, err, num_si;
> +	u32 val;
> +
> +	pf = enetc_si_priv(si);
> +	num_si = pf->caps.num_vsi + 1;
> +
> +	val = enetc_port_rd(hw, ENETC4_PSIPMMR);
> +	for (i = 0; i < num_si; i++) {
> +		seq_printf(s, "SI %d Unicast Promiscuous mode: %s\n",
> +			   i, is_en(PSIPMMR_SI_MAC_UP(i) & val));
> +		seq_printf(s, "SI %d Multicast Promiscuous mode: %s\n",
> +			   i, is_en(PSIPMMR_SI_MAC_MP(i) & val));
> +	}
> +
> +	/* MAC hash filter table */
> +	for (i = 0; i < num_si; i++)
> +		enetc_show_si_mac_hash_filter(s, i);
> +
> +	if (!pf->num_mfe)
> +		return 0;
> +
> +	/* MAC address filter table */
> +	seq_puts(s, "Show MAC address filter table\n");

The word "show" seems superfluous.

> +	for (i = 0; i < pf->num_mfe; i++) {
> +		memset(&maft_data, 0, sizeof(maft_data));
> +		err = ntmp_maft_query_entry(&si->ntmp.cbdrs, i, &maft_data);
> +		if (err)
> +			return err;
> +
> +		keye = &maft_data.keye;
> +		seq_printf(s, "Entry %d, MAC: %pM, SI bitmap: 0x%04x\n", i,
> +			   keye->mac_addr, le16_to_cpu(maft_data.cfge.si_bitmap));
> +	}
> +
> +	return 0;
> +}
> +DEFINE_SHOW_ATTRIBUTE(enetc_mac_filter);