Re: [PATCH 04/12] net: phy: unify get_phy_device and phy_device_create parameter list

From: Shyam Sundar S K
Date: Thu Apr 06 2023 - 12:51:58 EST

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+Raju

On 4/5/2023 2:56 PM, Marco Felsch wrote:
> Currently these two public APIs are used to create a 'struct phy_device'
> device. In addition to that the device get_phy_device() can adapt the
> is_c45 parameter as well if supprted by the mii bus.
>
> Both APIs do have a different set of parameters which can be unified to
> upcoming API extension. For this the 'struct phy_device_config' is
> introduced which is the only parameter for both functions. This new
> mechnism also adds the possiblity to read the configuration back within
> the driver for possible validation checks.
>
> Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>

For the change on AMD XGBE driver.

Acked-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx>

> ---
> drivers/net/ethernet/adi/adin1110.c | 6 ++-
> drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c | 8 +++-
> drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c | 11 +++--
> drivers/net/ethernet/socionext/netsec.c | 7 ++-
> drivers/net/mdio/fwnode_mdio.c | 13 +++---
> drivers/net/mdio/mdio-xgene.c | 6 ++-
> drivers/net/phy/fixed_phy.c | 6 ++-
> drivers/net/phy/mdio_bus.c | 7 ++-
> drivers/net/phy/nxp-tja11xx.c | 23 +++++-----
> drivers/net/phy/phy_device.c | 55 ++++++++++++-----------
> drivers/net/phy/sfp.c | 7 ++-
> include/linux/phy.h | 29 +++++++++---
> 12 files changed, 121 insertions(+), 57 deletions(-)
>
> diff --git a/drivers/net/ethernet/adi/adin1110.c b/drivers/net/ethernet/adi/adin1110.c
> index 3f316a0f4158..01b0c2a3a294 100644
> --- a/drivers/net/ethernet/adi/adin1110.c
> +++ b/drivers/net/ethernet/adi/adin1110.c
> @@ -1565,6 +1565,9 @@ static int adin1110_probe_netdevs(struct adin1110_priv *priv)
> {
> struct device *dev = &priv->spidev->dev;
> struct adin1110_port_priv *port_priv;
> + struct phy_device_config config = {
> + .mii_bus = priv->mii_bus,
> + };
> struct net_device *netdev;
> int ret;
> int i;
> @@ -1599,7 +1602,8 @@ static int adin1110_probe_netdevs(struct adin1110_priv *priv)
> netdev->priv_flags |= IFF_UNICAST_FLT;
> netdev->features |= NETIF_F_NETNS_LOCAL;
>
> - port_priv->phydev = get_phy_device(priv->mii_bus, i + 1, false);
> + config.phy_addr = i + 1;
> + port_priv->phydev = get_phy_device(&config);
> if (IS_ERR(port_priv->phydev)) {
> netdev_err(netdev, "Could not find PHY with device address: %d.\n", i);
> return PTR_ERR(port_priv->phydev);
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
> index 16e7fb2c0dae..27ba903bbd0a 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
> @@ -1056,6 +1056,10 @@ static int xgbe_phy_find_phy_device(struct xgbe_prv_data *pdata)
> {
> struct ethtool_link_ksettings *lks = &pdata->phy.lks;
> struct xgbe_phy_data *phy_data = pdata->phy_data;
> + struct phy_device_config config = {
> + .mii_bus = phy_data->mii,
> + .phy_addr = phy_data->mdio_addr,
> + };
> struct phy_device *phydev;
> int ret;
>
> @@ -1086,8 +1090,8 @@ static int xgbe_phy_find_phy_device(struct xgbe_prv_data *pdata)
> }
>
> /* Create and connect to the PHY device */
> - phydev = get_phy_device(phy_data->mii, phy_data->mdio_addr,
> - (phy_data->phydev_mode == XGBE_MDIO_MODE_CL45));
> + config.is_c45 = phy_data->phydev_mode == XGBE_MDIO_MODE_CL45;
> + phydev = get_phy_device(&config);
> if (IS_ERR(phydev)) {
> netdev_err(pdata->netdev, "get_phy_device failed\n");
> return -ENODEV;
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
> index 928d934cb21a..3c41c4db5d9b 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c
> @@ -687,9 +687,12 @@ static int
> hns_mac_register_phydev(struct mii_bus *mdio, struct hns_mac_cb *mac_cb,
> u32 addr)
> {
> + struct phy_device_config config = {
> + .mii_bus = mdio,
> + .phy_addr = addr,
> + };
> struct phy_device *phy;
> const char *phy_type;
> - bool is_c45;
> int rc;
>
> rc = fwnode_property_read_string(mac_cb->fw_port,
> @@ -698,13 +701,13 @@ hns_mac_register_phydev(struct mii_bus *mdio, struct hns_mac_cb *mac_cb,
> return rc;
>
> if (!strcmp(phy_type, phy_modes(PHY_INTERFACE_MODE_XGMII)))
> - is_c45 = true;
> + config.is_c45 = true;
> else if (!strcmp(phy_type, phy_modes(PHY_INTERFACE_MODE_SGMII)))
> - is_c45 = false;
> + config.is_c45 = false;
> else
> return -ENODATA;
>
> - phy = get_phy_device(mdio, addr, is_c45);
> + phy = get_phy_device(&config);
> if (!phy || IS_ERR(phy))
> return -EIO;
>
> diff --git a/drivers/net/ethernet/socionext/netsec.c b/drivers/net/ethernet/socionext/netsec.c
> index 2d7347b71c41..a0786dfb827a 100644
> --- a/drivers/net/ethernet/socionext/netsec.c
> +++ b/drivers/net/ethernet/socionext/netsec.c
> @@ -1948,6 +1948,11 @@ static int netsec_register_mdio(struct netsec_priv *priv, u32 phy_addr)
> return ret;
> }
> } else {
> + struct phy_device_config config = {
> + .mii_bus = bus,
> + .phy_addr = phy_addr,
> + };
> +
> /* Mask out all PHYs from auto probing. */
> bus->phy_mask = ~0;
> ret = mdiobus_register(bus);
> @@ -1956,7 +1961,7 @@ static int netsec_register_mdio(struct netsec_priv *priv, u32 phy_addr)
> return ret;
> }
>
> - priv->phydev = get_phy_device(bus, phy_addr, false);
> + priv->phydev = get_phy_device(&config);
> if (IS_ERR(priv->phydev)) {
> ret = PTR_ERR(priv->phydev);
> dev_err(priv->dev, "get_phy_device err(%d)\n", ret);
> diff --git a/drivers/net/mdio/fwnode_mdio.c b/drivers/net/mdio/fwnode_mdio.c
> index 1183ef5e203e..47ef702d4ffd 100644
> --- a/drivers/net/mdio/fwnode_mdio.c
> +++ b/drivers/net/mdio/fwnode_mdio.c
> @@ -112,10 +112,13 @@ EXPORT_SYMBOL(fwnode_mdiobus_phy_device_register);
> int fwnode_mdiobus_register_phy(struct mii_bus *bus,
> struct fwnode_handle *child, u32 addr)
> {
> + struct phy_device_config config = {
> + .mii_bus = bus,
> + .phy_addr = addr,
> + };
> struct mii_timestamper *mii_ts = NULL;
> struct pse_control *psec = NULL;
> struct phy_device *phy;
> - bool is_c45;
> u32 phy_id;
> int rc;
>
> @@ -129,11 +132,11 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
> goto clean_pse;
> }
>
> - is_c45 = fwnode_device_is_compatible(child, "ethernet-phy-ieee802.3-c45");
> - if (is_c45 || fwnode_get_phy_id(child, &phy_id))
> - phy = get_phy_device(bus, addr, is_c45);
> + config.is_c45 = fwnode_device_is_compatible(child, "ethernet-phy-ieee802.3-c45");
> + if (config.is_c45 || fwnode_get_phy_id(child, &config.phy_id))
> + phy = get_phy_device(&config);
> else
> - phy = phy_device_create(bus, addr, phy_id, 0, NULL);
> + phy = phy_device_create(&config);
> if (IS_ERR(phy)) {
> rc = PTR_ERR(phy);
> goto clean_mii_ts;
> diff --git a/drivers/net/mdio/mdio-xgene.c b/drivers/net/mdio/mdio-xgene.c
> index 7aafc221b5cf..6754c35aa6c3 100644
> --- a/drivers/net/mdio/mdio-xgene.c
> +++ b/drivers/net/mdio/mdio-xgene.c
> @@ -262,9 +262,13 @@ static int xgene_xfi_mdio_read(struct mii_bus *bus, int phy_id, int reg)
>
> struct phy_device *xgene_enet_phy_register(struct mii_bus *bus, int phy_addr)
> {
> + struct phy_device_config config = {
> + .mii_bus = bus,
> + .phy_addr = phy_addr,
> + };
> struct phy_device *phy_dev;
>
> - phy_dev = get_phy_device(bus, phy_addr, false);
> + phy_dev = get_phy_device(&config);
> if (!phy_dev || IS_ERR(phy_dev))
> return NULL;
>
> diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
> index aef739c20ac4..d217301a71d1 100644
> --- a/drivers/net/phy/fixed_phy.c
> +++ b/drivers/net/phy/fixed_phy.c
> @@ -229,6 +229,9 @@ static struct phy_device *__fixed_phy_register(unsigned int irq,
> struct gpio_desc *gpiod)
> {
> struct fixed_mdio_bus *fmb = &platform_fmb;
> + struct phy_device_config config = {
> + .mii_bus = fmb->mii_bus,
> + };
> struct phy_device *phy;
> int phy_addr;
> int ret;
> @@ -254,7 +257,8 @@ static struct phy_device *__fixed_phy_register(unsigned int irq,
> return ERR_PTR(ret);
> }
>
> - phy = get_phy_device(fmb->mii_bus, phy_addr, false);
> + config.phy_addr = phy_addr;
> + phy = get_phy_device(&config);
> if (IS_ERR(phy)) {
> fixed_phy_del(phy_addr);
> return ERR_PTR(-EINVAL);
> diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
> index 389f33a12534..8390db7ae4bc 100644
> --- a/drivers/net/phy/mdio_bus.c
> +++ b/drivers/net/phy/mdio_bus.c
> @@ -516,9 +516,14 @@ static int mdiobus_create_device(struct mii_bus *bus,
> static struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr, bool c45)
> {
> struct phy_device *phydev = ERR_PTR(-ENODEV);
> + struct phy_device_config config = {
> + .mii_bus = bus,
> + .phy_addr = addr,
> + .is_c45 = c45,
> + };
> int err;
>
> - phydev = get_phy_device(bus, addr, c45);
> + phydev = get_phy_device(&config);
> if (IS_ERR(phydev))
> return phydev;
>
> diff --git a/drivers/net/phy/nxp-tja11xx.c b/drivers/net/phy/nxp-tja11xx.c
> index ec91e671f8aa..b5e03d66b7f5 100644
> --- a/drivers/net/phy/nxp-tja11xx.c
> +++ b/drivers/net/phy/nxp-tja11xx.c
> @@ -554,17 +554,20 @@ static void tja1102_p1_register(struct work_struct *work)
> struct device *dev = &phydev_phy0->mdio.dev;
> struct device_node *np = dev->of_node;
> struct device_node *child;
> - int ret;
>
> for_each_available_child_of_node(np, child) {
> + struct phy_device_config config = {
> + .mii_bus = bus,
> + /* Real PHY ID of Port 1 is 0 */
> + .phy_id = PHY_ID_TJA1102,
> + };
> struct phy_device *phy;
> - int addr;
>
> - addr = of_mdio_parse_addr(dev, child);
> - if (addr < 0) {
> + config.phy_addr = of_mdio_parse_addr(dev, child);
> + if (config.phy_addr < 0) {
> dev_err(dev, "Can't parse addr\n");
> continue;
> - } else if (addr != phydev_phy0->mdio.addr + 1) {
> + } else if (config.phy_addr != phydev_phy0->mdio.addr + 1) {
> /* Currently we care only about double PHY chip TJA1102.
> * If some day NXP will decide to bring chips with more
> * PHYs, this logic should be reworked.
> @@ -574,16 +577,15 @@ static void tja1102_p1_register(struct work_struct *work)
> continue;
> }
>
> - if (mdiobus_is_registered_device(bus, addr)) {
> + if (mdiobus_is_registered_device(bus, config.phy_addr)) {
> dev_err(dev, "device is already registered\n");
> continue;
> }
>
> - /* Real PHY ID of Port 1 is 0 */
> - phy = phy_device_create(bus, addr, PHY_ID_TJA1102, false, NULL);
> + phy = phy_device_create(&config);
> if (IS_ERR(phy)) {
> dev_err(dev, "Can't create PHY device for Port 1: %i\n",
> - addr);
> + config.phy_addr);
> continue;
> }
>
> @@ -592,7 +594,8 @@ static void tja1102_p1_register(struct work_struct *work)
> */
> phy->mdio.dev.parent = dev;
>
> - ret = of_mdiobus_phy_device_register(bus, phy, child, addr);
> + ret = of_mdiobus_phy_device_register(bus, phy, child,
> + config.phy_addr);
> if (ret) {
> /* All resources needed for Port 1 should be already
> * available for Port 0. Both ports use the same
> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> index e4d08dcfed70..bb465a324eef 100644
> --- a/drivers/net/phy/phy_device.c
> +++ b/drivers/net/phy/phy_device.c
> @@ -629,8 +629,10 @@ static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
> return 0;
> }
>
> -static struct phy_device *phy_device_alloc(struct mii_bus *bus, int addr)
> +static struct phy_device *phy_device_alloc(struct phy_device_config *config)
> {
> + struct mii_bus *bus = config->mii_bus;
> + int addr = config->phy_addr;
> struct phy_device *dev;
> struct mdio_device *mdiodev;
>
> @@ -656,9 +658,15 @@ static struct phy_device *phy_device_alloc(struct mii_bus *bus, int addr)
> return dev;
> }
>
> -static int phy_device_init(struct phy_device *dev, u32 phy_id, bool is_c45,
> - struct phy_c45_device_ids *c45_ids)
> +static int phy_device_init(struct phy_device *dev,
> + struct phy_device_config *config)
> {
> + struct phy_c45_device_ids *c45_ids = &config->c45_ids;
> + struct mii_bus *bus = config->mii_bus;
> + bool is_c45 = config->is_c45;
> + u32 phy_id = config->phy_id;
> + int addr = config->phy_addr;
> +
> dev->speed = SPEED_UNKNOWN;
> dev->duplex = DUPLEX_UNKNOWN;
> dev->pause = 0;
> @@ -711,18 +719,16 @@ static int phy_device_init(struct phy_device *dev, u32 phy_id, bool is_c45,
> return phy_request_driver_module(dev, phy_id);
> }
>
> -struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
> - bool is_c45,
> - struct phy_c45_device_ids *c45_ids)
> +struct phy_device *phy_device_create(struct phy_device_config *config)
> {
> struct phy_device *dev;
> int ret;
>
> - dev = phy_device_alloc(bus, addr);
> + dev = phy_device_alloc(config);
> if (IS_ERR(dev))
> return dev;
>
> - ret = phy_device_init(dev, phy_id, is_c45, c45_ids);
> + ret = phy_device_init(dev, config);
> if (ret) {
> put_device(&dev->mdio.dev);
> dev = ERR_PTR(ret);
> @@ -954,12 +960,16 @@ int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
> }
> EXPORT_SYMBOL(fwnode_get_phy_id);
>
> -static int phy_device_detect(struct mii_bus *bus, int addr, bool *is_c45,
> - u32 *phy_id, struct phy_c45_device_ids *c45_ids)
> +static int phy_device_detect(struct phy_device_config *config)
> {
> + struct phy_c45_device_ids *c45_ids = &config->c45_ids;
> + struct mii_bus *bus = config->mii_bus;
> + u32 *phy_id = &config->phy_id;
> + bool is_c45 = config->is_c45;
> + int addr = config->phy_addr;
> int r;
>
> - if (*is_c45)
> + if (is_c45)
> r = get_phy_c45_ids(bus, addr, c45_ids);
> else
> r = get_phy_c22_id(bus, addr, phy_id);
> @@ -972,8 +982,8 @@ static int phy_device_detect(struct mii_bus *bus, int addr, bool *is_c45,
> * probe with C45 to see if we're able to get a valid PHY ID in the C45
> * space, if successful, create the C45 PHY device.
> */
> - if (!*is_c45 && *phy_id == 0 && bus->read_c45) {
> - *is_c45 = true;
> + if (!is_c45 && *phy_id == 0 && bus->read_c45) {
> + config->is_c45 = true;
> return get_phy_c45_ids(bus, addr, c45_ids);
> }
>
> @@ -983,11 +993,9 @@ static int phy_device_detect(struct mii_bus *bus, int addr, bool *is_c45,
> /**
> * get_phy_device - reads the specified PHY device and returns its @phy_device
> * struct
> - * @bus: the target MII bus
> - * @addr: PHY address on the MII bus
> - * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
> + * @config: The PHY device config
> *
> - * Probe for a PHY at @addr on @bus.
> + * Use the @config parameters to probe for a PHY.
> *
> * When probing for a clause 22 PHY, then read the ID registers. If we find
> * a valid ID, allocate and return a &struct phy_device.
> @@ -999,21 +1007,18 @@ static int phy_device_detect(struct mii_bus *bus, int addr, bool *is_c45,
> * Returns an allocated &struct phy_device on success, %-ENODEV if there is
> * no PHY present, or %-EIO on bus access error.
> */
> -struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
> +struct phy_device *get_phy_device(struct phy_device_config *config)
> {
> - struct phy_c45_device_ids c45_ids;
> - u32 phy_id = 0;
> + struct phy_c45_device_ids *c45_ids = &config->c45_ids;
> int r;
>
> - c45_ids.devices_in_package = 0;
> - c45_ids.mmds_present = 0;
> - memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
> + memset(c45_ids->device_ids, 0xff, sizeof(c45_ids->device_ids));
>
> - r = phy_device_detect(bus, addr, &is_c45, &phy_id, &c45_ids);
> + r = phy_device_detect(config);
> if (r)
> return ERR_PTR(r);
>
> - return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
> + return phy_device_create(config);
> }
> EXPORT_SYMBOL(get_phy_device);
>
> diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
> index f0fcb06fbe82..8fb0a1a49aaf 100644
> --- a/drivers/net/phy/sfp.c
> +++ b/drivers/net/phy/sfp.c
> @@ -1635,10 +1635,15 @@ static void sfp_sm_phy_detach(struct sfp *sfp)
>
> static int sfp_sm_probe_phy(struct sfp *sfp, int addr, bool is_c45)
> {
> + struct phy_device_config config = {
> + .mii_bus = sfp->i2c_mii,
> + .phy_addr = addr,
> + .is_c45 = is_c45,
> + };
> struct phy_device *phy;
> int err;
>
> - phy = get_phy_device(sfp->i2c_mii, addr, is_c45);
> + phy = get_phy_device(&config);
> if (phy == ERR_PTR(-ENODEV))
> return PTR_ERR(phy);
> if (IS_ERR(phy)) {
> diff --git a/include/linux/phy.h b/include/linux/phy.h
> index c17a98712555..498f4dc7669d 100644
> --- a/include/linux/phy.h
> +++ b/include/linux/phy.h
> @@ -756,6 +756,27 @@ static inline struct phy_device *to_phy_device(const struct device *dev)
> return container_of(to_mdio_device(dev), struct phy_device, mdio);
> }
>
> +/**
> + * struct phy_device_config - Configuration of a PHY
> + *
> + * @mii_bus: The target MII bus the PHY is connected to
> + * @phy_addr: PHY address on the MII bus
> + * @phy_id: UID for this device found during discovery
> + * @c45_ids: 802.3-c45 Device Identifiers if is_c45.
> + * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
> + *
> + * The struct contain possible configuration parameters for a PHY device which
> + * are used to setup the struct phy_device.
> + */
> +
> +struct phy_device_config {
> + struct mii_bus *mii_bus;
> + int phy_addr;
> + u32 phy_id;
> + struct phy_c45_device_ids c45_ids;
> + bool is_c45;
> +};
> +
> /**
> * struct phy_tdr_config - Configuration of a TDR raw test
> *
> @@ -1538,9 +1559,7 @@ int phy_modify_paged_changed(struct phy_device *phydev, int page, u32 regnum,
> int phy_modify_paged(struct phy_device *phydev, int page, u32 regnum,
> u16 mask, u16 set);
>
> -struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
> - bool is_c45,
> - struct phy_c45_device_ids *c45_ids);
> +struct phy_device *phy_device_create(struct phy_device_config *config);
> void phy_device_set_miits(struct phy_device *phydev,
> struct mii_timestamper *mii_ts);
> #if IS_ENABLED(CONFIG_PHYLIB)
> @@ -1549,7 +1568,7 @@ struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode);
> struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode);
> struct phy_device *device_phy_find_device(struct device *dev);
> struct fwnode_handle *fwnode_get_phy_node(const struct fwnode_handle *fwnode);
> -struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);
> +struct phy_device *get_phy_device(struct phy_device_config *config);
> int phy_device_register(struct phy_device *phy);
> void phy_device_free(struct phy_device *phydev);
> #else
> @@ -1581,7 +1600,7 @@ struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode)
> }
>
> static inline
> -struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
> +struct phy_device *get_phy_device(struct phy_device_config *config)
> {
> return NULL;
> }
>

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