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Message-ID:
<PAXPR04MB85103094C1F7ABB9FDC4EADF88462@PAXPR04MB8510.eurprd04.prod.outlook.com>
Date: Wed, 16 Oct 2024 01:50:08 +0000
From: Wei Fang <wei.fang@....com>
To: Frank Li <frank.li@....com>
CC: "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>, Claudiu
Manoil <claudiu.manoil@....com>, Clark Wang <xiaoning.wang@....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>,
"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: Frank Li <frank.li@....com>
> Sent: 2024年10月16日 0:54
> To: Wei Fang <wei.fang@....com>
> Cc: davem@...emloft.net; edumazet@...gle.com; kuba@...nel.org;
> pabeni@...hat.com; robh@...nel.org; krzk+dt@...nel.org;
> conor+dt@...nel.org; Vladimir Oltean <vladimir.oltean@....com>; Claudiu
> Manoil <claudiu.manoil@....com>; Clark Wang <xiaoning.wang@....com>;
> christophe.leroy@...roup.eu; linux@...linux.org.uk; bhelgaas@...gle.com;
> horms@...nel.org; imx@...ts.linux.dev; netdev@...r.kernel.org;
> devicetree@...r.kernel.org; linux-kernel@...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()
>
> On Tue, Oct 15, 2024 at 08:58:38PM +0800, Wei Fang wrote:
> > 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);
>
> Old code have not use cleanup. Please keep exact same as old codes.
> Or you should mention at commit log at least.
>
Okay, I will mention it at the commit message.
>
> > + 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);
> > +
> > + return 0;
> > +}
> > +
> > +static void enetc_int_vector_destroy(struct enetc_ndev_priv *priv,
> > +int i) {
> > + struct enetc_int_vector *v = priv->int_vector[i];
> > + struct enetc_bdr *rx_ring = &v->rx_ring;
> > + int j, tx_ring_index;
> > +
> > + xdp_rxq_info_unreg_mem_model(&rx_ring->xdp.rxq);
> > + xdp_rxq_info_unreg(&rx_ring->xdp.rxq);
> > + netif_napi_del(&v->napi);
> > + cancel_work_sync(&v->rx_dim.work);
> > +
> > + priv->rx_ring[i] = NULL;
> > +
> > + for (j = 0; j < v->count_tx_rings; j++) {
> > + tx_ring_index = priv->bdr_int_num * j + i;
> > + priv->tx_ring[tx_ring_index] = NULL;
> > + }
> > +
> > + kfree(v);
> > + priv->int_vector[i] = NULL;
> > +}
> > +
> > int enetc_alloc_msix(struct enetc_ndev_priv *priv) {
> > struct pci_dev *pdev = priv->si->pdev; @@ -2986,64 +3067,9 @@ int
> > enetc_alloc_msix(struct enetc_ndev_priv *priv)
> > /* # of tx rings per int vector */
> > v_tx_rings = priv->num_tx_rings / priv->bdr_int_num;
> >
> > - for (i = 0; i < priv->bdr_int_num; i++) {
> > - struct enetc_int_vector *v;
> > - struct enetc_bdr *bdr;
> > - int j;
> > -
> > - v = kzalloc(struct_size(v, tx_ring, v_tx_rings), GFP_KERNEL);
> > - if (!v) {
> > - err = -ENOMEM;
> > + for (i = 0; i < priv->bdr_int_num; i++)
> > + if (enetc_int_vector_init(priv, i, v_tx_rings))
> > goto fail;
> > - }
> > -
> > - priv->int_vector[i] = v;
> > -
> > - 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) {
> > - kfree(v);
> > - goto fail;
> > - }
> > -
> > - err = xdp_rxq_info_reg_mem_model(&bdr->xdp.rxq,
> > - MEM_TYPE_PAGE_SHARED, NULL);
> > - if (err) {
> > - xdp_rxq_info_unreg(&bdr->xdp.rxq);
> > - kfree(v);
> > - goto fail;
> > - }
> > -
> > - /* 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;
> > - }
> > - }
> >
> > num_stack_tx_queues = enetc_num_stack_tx_queues(priv);
> >
> > @@ -3062,16 +3088,8 @@ int enetc_alloc_msix(struct enetc_ndev_priv
> *priv)
> > return 0;
> >
> > fail:
> > - while (i--) {
> > - struct enetc_int_vector *v = priv->int_vector[i];
> > - struct enetc_bdr *rx_ring = &v->rx_ring;
> > -
> > - xdp_rxq_info_unreg_mem_model(&rx_ring->xdp.rxq);
> > - xdp_rxq_info_unreg(&rx_ring->xdp.rxq);
> > - netif_napi_del(&v->napi);
> > - cancel_work_sync(&v->rx_dim.work);
> > - kfree(v);
> > - }
> > + while (i--)
> > + enetc_int_vector_destroy(priv, i);
> >
> > pci_free_irq_vectors(pdev);
> >
> > @@ -3083,26 +3101,8 @@ void enetc_free_msix(struct enetc_ndev_priv
> > *priv) {
> > int i;
> >
> > - for (i = 0; i < priv->bdr_int_num; i++) {
> > - struct enetc_int_vector *v = priv->int_vector[i];
> > - struct enetc_bdr *rx_ring = &v->rx_ring;
> > -
> > - xdp_rxq_info_unreg_mem_model(&rx_ring->xdp.rxq);
> > - xdp_rxq_info_unreg(&rx_ring->xdp.rxq);
> > - netif_napi_del(&v->napi);
> > - cancel_work_sync(&v->rx_dim.work);
> > - }
> > -
> > - for (i = 0; i < priv->num_rx_rings; i++)
> > - priv->rx_ring[i] = NULL;
> > -
> > - for (i = 0; i < priv->num_tx_rings; i++)
> > - priv->tx_ring[i] = NULL;
> > -
> > - for (i = 0; i < priv->bdr_int_num; i++) {
> > - kfree(priv->int_vector[i]);
> > - priv->int_vector[i] = NULL;
> > - }
> > + for (i = 0; i < priv->bdr_int_num; i++)
> > + enetc_int_vector_destroy(priv, i);
> >
> > /* disable all MSIX for this device */
> > pci_free_irq_vectors(priv->si->pdev);
> > --
> > 2.34.1
> >
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