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Message-ID:
<PAXPR04MB85107E2089569E529BCC7E2888402@PAXPR04MB8510.eurprd04.prod.outlook.com>
Date: Fri, 18 Oct 2024 01:30:07 +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 v3 net-next 06/13] net: enetc: build enetc_pf_common.c as
a separate module
> -----Original Message-----
> From: Frank Li <frank.li@....com>
> Sent: 2024年10月18日 0:40
> 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 v3 net-next 06/13] net: enetc: build enetc_pf_common.c
> as a separate module
>
> On Thu, Oct 17, 2024 at 03:46:30PM +0800, Wei Fang wrote:
> > Compile enetc_pf_common.c as a standalone module to allow shared usage
> > between ENETC v1 and v4 PF drivers. Add struct enetc_pf_ops to
> > register different hardware operation interfaces for both ENETC v1 and
> > v4 PF drivers.
> >
> > Signed-off-by: Wei Fang <wei.fang@....com>
> > ---
> > v2 changes:
> > This patch is separated from v1 patch 5 ("net: enetc: add
> > enetc-pf-common driver support"), only the changes to compile
> > enetc_pf_common.c into a separated driver are kept.
> > v3 changes:
> > Refactor the commit message.
> > ---
> > drivers/net/ethernet/freescale/enetc/Kconfig | 9 ++++
> > drivers/net/ethernet/freescale/enetc/Makefile | 5 +-
> > .../net/ethernet/freescale/enetc/enetc_pf.c | 26 ++++++++--
> > .../net/ethernet/freescale/enetc/enetc_pf.h | 21 ++++++--
> > .../freescale/enetc/enetc_pf_common.c | 50
> ++++++++++++++++---
> > 5 files changed, 96 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/freescale/enetc/Kconfig
> > b/drivers/net/ethernet/freescale/enetc/Kconfig
> > index 51d80ea959d4..fdd3ecbd1dbf 100644
> > --- a/drivers/net/ethernet/freescale/enetc/Kconfig
> > +++ b/drivers/net/ethernet/freescale/enetc/Kconfig
> > @@ -7,6 +7,14 @@ config FSL_ENETC_CORE
> >
> > If compiled as module (M), the module name is fsl-enetc-core.
> >
> > +config NXP_ENETC_PF_COMMON
> > + tristate "ENETC PF common functionality driver"
> > + help
> > + This module supports common functionality between drivers of
> > + different versions of NXP ENETC PF controllers.
> > +
> > + If compiled as module (M), the module name is nxp-enetc-pf-common.
> > +
> > config FSL_ENETC
> > tristate "ENETC PF driver"
> > depends on PCI_MSI
> > @@ -14,6 +22,7 @@ config FSL_ENETC
> > select FSL_ENETC_CORE
> > select FSL_ENETC_IERB
> > select FSL_ENETC_MDIO
> > + select NXP_ENETC_PF_COMMON
> > select PHYLINK
> > select PCS_LYNX
> > select DIMLIB
> > diff --git a/drivers/net/ethernet/freescale/enetc/Makefile
> > b/drivers/net/ethernet/freescale/enetc/Makefile
> > index 39675e9ff39d..b81ca462e358 100644
> > --- a/drivers/net/ethernet/freescale/enetc/Makefile
> > +++ b/drivers/net/ethernet/freescale/enetc/Makefile
> > @@ -3,8 +3,11 @@
> > obj-$(CONFIG_FSL_ENETC_CORE) += fsl-enetc-core.o fsl-enetc-core-y :=
> > enetc.o enetc_cbdr.o enetc_ethtool.o
> >
> > +obj-$(CONFIG_NXP_ENETC_PF_COMMON) += nxp-enetc-pf-common.o
> > +nxp-enetc-pf-common-y := enetc_pf_common.o
> > +
> > obj-$(CONFIG_FSL_ENETC) += fsl-enetc.o -fsl-enetc-y := enetc_pf.o
> > enetc_pf_common.o
> > +fsl-enetc-y := enetc_pf.o
> > fsl-enetc-$(CONFIG_PCI_IOV) += enetc_msg.o
> > fsl-enetc-$(CONFIG_FSL_ENETC_QOS) += enetc_qos.o
> >
> > diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
> > b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
> > index 3cdd149056f9..7522316ddfea 100644
> > --- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
> > +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
> > @@ -11,7 +11,7 @@
> >
> > #define ENETC_DRV_NAME_STR "ENETC PF driver"
> >
> > -void enetc_pf_get_primary_mac_addr(struct enetc_hw *hw, int si, u8
> > *addr)
> > +static void enetc_pf_get_primary_mac_addr(struct enetc_hw *hw, int
> > +si, u8 *addr)
> > {
> > u32 upper = __raw_readl(hw->port + ENETC_PSIPMAR0(si));
> > u16 lower = __raw_readw(hw->port + ENETC_PSIPMAR1(si)); @@ -20,8
> > +20,8 @@ void enetc_pf_get_primary_mac_addr(struct enetc_hw *hw, int si,
> u8 *addr)
> > put_unaligned_le16(lower, addr + 4); }
> >
> > -void enetc_pf_set_primary_mac_addr(struct enetc_hw *hw, int si,
> > - const u8 *addr)
> > +static void enetc_pf_set_primary_mac_addr(struct enetc_hw *hw, int si,
> > + const u8 *addr)
> > {
> > u32 upper = get_unaligned_le32(addr);
> > u16 lower = get_unaligned_le16(addr + 4); @@ -30,6 +30,17 @@ void
> > enetc_pf_set_primary_mac_addr(struct enetc_hw *hw, int si,
> > __raw_writew(lower, hw->port + ENETC_PSIPMAR1(si)); }
> >
> > +static struct phylink_pcs *enetc_pf_create_pcs(struct enetc_pf *pf,
> > + struct mii_bus *bus)
> > +{
> > + return lynx_pcs_create_mdiodev(bus, 0); }
> > +
> > +static void enetc_pf_destroy_pcs(struct phylink_pcs *pcs) {
> > + lynx_pcs_destroy(pcs);
> > +}
> > +
> > static void enetc_set_vlan_promisc(struct enetc_hw *hw, char si_map)
> > {
> > u32 val = enetc_port_rd(hw, ENETC_PSIPVMR); @@ -970,6 +981,14 @@
> > static void enetc_psi_destroy(struct pci_dev *pdev)
> > enetc_pci_remove(pdev);
> > }
> >
> > +static const struct enetc_pf_ops enetc_pf_ops = {
> > + .set_si_primary_mac = enetc_pf_set_primary_mac_addr,
> > + .get_si_primary_mac = enetc_pf_get_primary_mac_addr,
> > + .create_pcs = enetc_pf_create_pcs,
> > + .destroy_pcs = enetc_pf_destroy_pcs,
> > + .enable_psfp = enetc_psfp_enable,
> > +};
> > +
> > static int enetc_pf_probe(struct pci_dev *pdev,
> > const struct pci_device_id *ent) { @@ -997,6 +1016,7 @@
> static
> > int enetc_pf_probe(struct pci_dev *pdev,
> > pf = enetc_si_priv(si);
> > pf->si = si;
> > pf->total_vfs = pci_sriov_get_totalvfs(pdev);
> > + enetc_pf_ops_register(pf, &enetc_pf_ops);
> >
> > err = enetc_setup_mac_addresses(node, pf);
> > if (err)
> > diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.h
> > b/drivers/net/ethernet/freescale/enetc/enetc_pf.h
> > index 92a26b09cf57..39db9d5c2e50 100644
> > --- a/drivers/net/ethernet/freescale/enetc/enetc_pf.h
> > +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.h
> > @@ -28,6 +28,16 @@ struct enetc_vf_state {
> > enum enetc_vf_flags flags;
> > };
> >
> > +struct enetc_pf;
> > +
> > +struct enetc_pf_ops {
> > + void (*set_si_primary_mac)(struct enetc_hw *hw, int si, const u8 *addr);
> > + void (*get_si_primary_mac)(struct enetc_hw *hw, int si, u8 *addr);
>
> Is it possible get_si_primary_mac() return failure?
>
get_si_primary_mac() get the MAC by reading registers, and we will check
the MAC address. See below code snippet. So there is no need to return
error.
if (is_zero_ether_addr(mac_addr) && pf->ops->get_si_primary_mac)
pf->ops->get_si_primary_mac(hw, si, mac_addr);
/* (3) choose a random one */
if (is_zero_ether_addr(mac_addr)) {
eth_random_addr(mac_addr);
dev_info(dev, "no MAC address specified for SI%d, using %pM\n",
si, mac_addr);
}
>
> > + struct phylink_pcs *(*create_pcs)(struct enetc_pf *pf, struct mii_bus
> *bus);
> > + void (*destroy_pcs)(struct phylink_pcs *pcs);
> > + int (*enable_psfp)(struct enetc_ndev_priv *priv); };
> > +
> > struct enetc_pf {
> > struct enetc_si *si;
> > int num_vfs; /* number of active VFs, after sriov_init */ @@ -50,6
> > +60,8 @@ struct enetc_pf {
> >
> > phy_interface_t if_mode;
> > struct phylink_config phylink_config;
> > +
> > + const struct enetc_pf_ops *ops;
> > };
> >
> > #define phylink_to_enetc_pf(config) \ @@ -59,9 +71,6 @@ int
> > enetc_msg_psi_init(struct enetc_pf *pf); void
> > enetc_msg_psi_free(struct enetc_pf *pf); void
> > enetc_msg_handle_rxmsg(struct enetc_pf *pf, int mbox_id, u16 *status);
> >
> > -void enetc_pf_get_primary_mac_addr(struct enetc_hw *hw, int si, u8
> > *addr); -void enetc_pf_set_primary_mac_addr(struct enetc_hw *hw, int si,
> > - const u8 *addr);
> > int enetc_pf_set_mac_addr(struct net_device *ndev, void *addr); int
> > enetc_setup_mac_addresses(struct device_node *np, struct enetc_pf
> > *pf); void enetc_pf_netdev_setup(struct enetc_si *si, struct
> > net_device *ndev, @@ -71,3 +80,9 @@ void enetc_mdiobus_destroy(struct
> > enetc_pf *pf); int enetc_phylink_create(struct enetc_ndev_priv *priv, struct
> device_node *node,
> > const struct phylink_mac_ops *ops); void
> > enetc_phylink_destroy(struct enetc_ndev_priv *priv);
> > +
> > +static inline void enetc_pf_ops_register(struct enetc_pf *pf,
> > + const struct enetc_pf_ops *ops) {
> > + pf->ops = ops;
> > +}
> > diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
> > b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
> > index bce81a4f6f88..94690ed92e3f 100644
> > --- a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
> > +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
> > @@ -8,19 +8,37 @@
> >
> > #include "enetc_pf.h"
> >
> > +static int enetc_set_si_hw_addr(struct enetc_pf *pf, int si, u8
> > +*mac_addr) {
> > + struct enetc_hw *hw = &pf->si->hw;
> > +
> > + if (pf->ops->set_si_primary_mac)
> > + pf->ops->set_si_primary_mac(hw, si, mac_addr);
> > + else
> > + return -EOPNOTSUPP;
> > +
> > + return 0;
> > +}
> > +
> > int enetc_pf_set_mac_addr(struct net_device *ndev, void *addr) {
> > struct enetc_ndev_priv *priv = netdev_priv(ndev);
> > + struct enetc_pf *pf = enetc_si_priv(priv->si);
> > struct sockaddr *saddr = addr;
> > + int err;
> >
> > if (!is_valid_ether_addr(saddr->sa_data))
> > return -EADDRNOTAVAIL;
> >
> > + err = enetc_set_si_hw_addr(pf, 0, saddr->sa_data);
> > + if (err)
> > + return err;
> > +
> > eth_hw_addr_set(ndev, saddr->sa_data);
> > - enetc_pf_set_primary_mac_addr(&priv->si->hw, 0, saddr->sa_data);
> >
> > return 0;
> > }
> > +EXPORT_SYMBOL_GPL(enetc_pf_set_mac_addr);
> >
> > static int enetc_setup_mac_address(struct device_node *np, struct
> enetc_pf *pf,
> > int si)
> > @@ -38,8 +56,8 @@ static int enetc_setup_mac_address(struct
> device_node *np, struct enetc_pf *pf,
> > }
> >
> > /* (2) bootloader supplied MAC address */
> > - if (is_zero_ether_addr(mac_addr))
> > - enetc_pf_get_primary_mac_addr(hw, si, mac_addr);
> > + if (is_zero_ether_addr(mac_addr) && pf->ops->get_si_primary_mac)
> > + pf->ops->get_si_primary_mac(hw, si, mac_addr);
> >
> > /* (3) choose a random one */
> > if (is_zero_ether_addr(mac_addr)) {
> > @@ -48,7 +66,9 @@ static int enetc_setup_mac_address(struct
> device_node *np, struct enetc_pf *pf,
> > si, mac_addr);
> > }
> >
> > - enetc_pf_set_primary_mac_addr(hw, si, mac_addr);
> > + err = enetc_set_si_hw_addr(pf, si, mac_addr);
> > + if (err)
> > + return err;
> >
> > return 0;
> > }
> > @@ -70,11 +90,13 @@ int enetc_setup_mac_addresses(struct device_node
> > *np, struct enetc_pf *pf)
> >
> > return 0;
> > }
> > +EXPORT_SYMBOL_GPL(enetc_setup_mac_addresses);
> >
> > void enetc_pf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
> > const struct net_device_ops *ndev_ops) {
> > struct enetc_ndev_priv *priv = netdev_priv(ndev);
> > + struct enetc_pf *pf = enetc_si_priv(si);
> >
> > SET_NETDEV_DEV(ndev, &si->pdev->dev);
> > priv->ndev = ndev;
> > @@ -107,7 +129,8 @@ void enetc_pf_netdev_setup(struct enetc_si *si,
> struct net_device *ndev,
> > NETDEV_XDP_ACT_NDO_XMIT |
> NETDEV_XDP_ACT_RX_SG |
> > NETDEV_XDP_ACT_NDO_XMIT_SG;
> >
> > - if (si->hw_features & ENETC_SI_F_PSFP && !enetc_psfp_enable(priv)) {
> > + if (si->hw_features & ENETC_SI_F_PSFP && pf->ops->enable_psfp &&
> > + !pf->ops->enable_psfp(priv)) {
> > priv->active_offloads |= ENETC_F_QCI;
> > ndev->features |= NETIF_F_HW_TC;
> > ndev->hw_features |= NETIF_F_HW_TC;
> > @@ -116,6 +139,7 @@ void enetc_pf_netdev_setup(struct enetc_si *si,
> struct net_device *ndev,
> > /* pick up primary MAC address from SI */
> > enetc_load_primary_mac_addr(&si->hw, ndev);
> > }
> > +EXPORT_SYMBOL_GPL(enetc_pf_netdev_setup);
> >
> > static int enetc_mdio_probe(struct enetc_pf *pf, struct device_node *np)
> > {
> > @@ -162,6 +186,9 @@ static int enetc_imdio_create(struct enetc_pf *pf)
> > struct mii_bus *bus;
> > int err;
> >
> > + if (!pf->ops->create_pcs)
> > + return -EOPNOTSUPP;
> > +
> > bus = mdiobus_alloc_size(sizeof(*mdio_priv));
> > if (!bus)
> > return -ENOMEM;
> > @@ -184,7 +211,7 @@ static int enetc_imdio_create(struct enetc_pf *pf)
> > goto free_mdio_bus;
> > }
> >
> > - phylink_pcs = lynx_pcs_create_mdiodev(bus, 0);
> > + phylink_pcs = pf->ops->create_pcs(pf, bus);
> > if (IS_ERR(phylink_pcs)) {
> > err = PTR_ERR(phylink_pcs);
> > dev_err(dev, "cannot create lynx pcs (%d)\n", err);
> > @@ -205,8 +232,8 @@ static int enetc_imdio_create(struct enetc_pf *pf)
> >
> > static void enetc_imdio_remove(struct enetc_pf *pf)
> > {
> > - if (pf->pcs)
> > - lynx_pcs_destroy(pf->pcs);
> > + if (pf->pcs && pf->ops->destroy_pcs)
> > + pf->ops->destroy_pcs(pf->pcs);
> >
> > if (pf->imdio) {
> > mdiobus_unregister(pf->imdio);
> > @@ -246,12 +273,14 @@ int enetc_mdiobus_create(struct enetc_pf *pf,
> struct device_node *node)
> >
> > return 0;
> > }
> > +EXPORT_SYMBOL_GPL(enetc_mdiobus_create);
> >
> > void enetc_mdiobus_destroy(struct enetc_pf *pf)
> > {
> > enetc_mdio_remove(pf);
> > enetc_imdio_remove(pf);
> > }
> > +EXPORT_SYMBOL_GPL(enetc_mdiobus_destroy);
> >
> > int enetc_phylink_create(struct enetc_ndev_priv *priv, struct device_node
> *node,
> > const struct phylink_mac_ops *ops)
> > @@ -288,8 +317,13 @@ int enetc_phylink_create(struct enetc_ndev_priv
> *priv, struct device_node *node,
> >
> > return 0;
> > }
> > +EXPORT_SYMBOL_GPL(enetc_phylink_create);
> >
> > void enetc_phylink_destroy(struct enetc_ndev_priv *priv)
> > {
> > phylink_destroy(priv->phylink);
> > }
> > +EXPORT_SYMBOL_GPL(enetc_phylink_destroy);
> > +
> > +MODULE_DESCRIPTION("NXP ENETC PF common functionality driver");
> > +MODULE_LICENSE("Dual BSD/GPL");
> > --
> > 2.34.1
> >
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