linux-kernel - RE: [PATCH v2 net-next 10/13] net: enetc: extract enetc_int_vector_init/destroy() from enetc_alloc

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Message-ID:
 <AS8PR04MB88494082BF14B480936F6DA996452@AS8PR04MB8849.eurprd04.prod.outlook.com>
Date: Tue, 15 Oct 2024 16:33:49 +0000
From: Claudiu Manoil <claudiu.manoil@....com>
To: Wei Fang <wei.fang@....com>, "davem@...emloft.net" <davem@...emloft.net>,
	"edumazet@...gle.com" <edumazet@...gle.com>, "kuba@...nel.org"
	<kuba@...nel.org>, "pabeni@...hat.com" <pabeni@...hat.com>, "robh@...nel.org"
	<robh@...nel.org>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
	"conor+dt@...nel.org" <conor+dt@...nel.org>, Vladimir Oltean
	<vladimir.oltean@....com>, Clark Wang <xiaoning.wang@....com>, Frank Li
	<frank.li@....com>, "christophe.leroy@...roup.eu"
	<christophe.leroy@...roup.eu>, "linux@...linux.org.uk"
	<linux@...linux.org.uk>, "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
	"horms@...nel.org" <horms@...nel.org>
CC: "imx@...ts.linux.dev" <imx@...ts.linux.dev>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "linux-pci@...r.kernel.org"
	<linux-pci@...r.kernel.org>
Subject: RE: [PATCH v2 net-next 10/13] net: enetc: extract
 enetc_int_vector_init/destroy() from enetc_alloc_msix()

> -----Original Message-----
> From: Wei Fang <wei.fang@....com>
> Sent: Tuesday, October 15, 2024 3:59 PM
[...]
> Subject: [PATCH v2 net-next 10/13] net: enetc: extract
> enetc_int_vector_init/destroy() from enetc_alloc_msix()
> 
> From: Clark Wang <xiaoning.wang@....com>
> 
> Extract enetc_int_vector_init() and enetc_int_vector_destroy() from
> enetc_alloc_msix() so that the code is more concise and readable.
> 
> Signed-off-by: Clark Wang <xiaoning.wang@....com>
> Signed-off-by: Wei Fang <wei.fang@....com>
> ---
> v2 changes:
> This patch is separated from v1 patch 9 ("net: enetc: optimize the
> allocation of tx_bdr"). Separate enetc_int_vector_init() from the
> original patch. In addition, add new help function
> enetc_int_vector_destroy().
> ---
>  drivers/net/ethernet/freescale/enetc/enetc.c | 174 +++++++++----------
>  1 file changed, 87 insertions(+), 87 deletions(-)
> 
> diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c
> b/drivers/net/ethernet/freescale/enetc/enetc.c
> index 032d8eadd003..d36af3f8ba31 100644
> --- a/drivers/net/ethernet/freescale/enetc/enetc.c
> +++ b/drivers/net/ethernet/freescale/enetc/enetc.c
> @@ -2965,6 +2965,87 @@ int enetc_ioctl(struct net_device *ndev, struct
> ifreq *rq, int cmd)
>  }
>  EXPORT_SYMBOL_GPL(enetc_ioctl);
> 
> +static int enetc_int_vector_init(struct enetc_ndev_priv *priv, int i,
> +				 int v_tx_rings)
> +{
> +	struct enetc_int_vector *v __free(kfree);
> +	struct enetc_bdr *bdr;
> +	int j, err;
> +
> +	v = kzalloc(struct_size(v, tx_ring, v_tx_rings), GFP_KERNEL);
> +	if (!v)
> +		return -ENOMEM;
> +
> +	bdr = &v->rx_ring;
> +	bdr->index = i;
> +	bdr->ndev = priv->ndev;
> +	bdr->dev = priv->dev;
> +	bdr->bd_count = priv->rx_bd_count;
> +	bdr->buffer_offset = ENETC_RXB_PAD;
> +	priv->rx_ring[i] = bdr;
> +
> +	err = xdp_rxq_info_reg(&bdr->xdp.rxq, priv->ndev, i, 0);
> +	if (err)
> +		return err;
> +
> +	err = xdp_rxq_info_reg_mem_model(&bdr->xdp.rxq,
> +					 MEM_TYPE_PAGE_SHARED, NULL);
> +	if (err) {
> +		xdp_rxq_info_unreg(&bdr->xdp.rxq);
> +		return err;
> +	}
> +
> +	/* init defaults for adaptive IC */
> +	if (priv->ic_mode & ENETC_IC_RX_ADAPTIVE) {
> +		v->rx_ictt = 0x1;
> +		v->rx_dim_en = true;
> +	}
> +
> +	INIT_WORK(&v->rx_dim.work, enetc_rx_dim_work);
> +	netif_napi_add(priv->ndev, &v->napi, enetc_poll);
> +	v->count_tx_rings = v_tx_rings;
> +
> +	for (j = 0; j < v_tx_rings; j++) {
> +		int idx;
> +
> +		/* default tx ring mapping policy */
> +		idx = priv->bdr_int_num * j + i;
> +		__set_bit(idx, &v->tx_rings_map);
> +		bdr = &v->tx_ring[j];
> +		bdr->index = idx;
> +		bdr->ndev = priv->ndev;
> +		bdr->dev = priv->dev;
> +		bdr->bd_count = priv->tx_bd_count;
> +		priv->tx_ring[idx] = bdr;
> +	}
> +
> +	priv->int_vector[i] = no_free_ptr(v);

This is new, and looks like it's a fix on its own. It's fixing a dangling reference in int_vectror[i],
if I'm not wrong.

Other than that, like for the original patch:
Reviewed-by: Claudiu Manoil <claudiu.manoil@....com>