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Message-ID: <CA+h21hpacLmKzoeKrdE-frZSTsiYCi4rKCObJ4LfAmfrCJ6H9g@mail.gmail.com>
Date: Tue, 30 Jul 2019 02:39:58 +0300
From: Vladimir Oltean <olteanv@...il.com>
To: Arseny Solokha <asolokha@...kras.ru>,
Claudiu Manoil <claudiu.manoil@....com>,
Russell King <linux@...linux.org.uk>
Cc: Ioana Ciornei <ioana.ciornei@....com>,
Andrew Lunn <andrew@...n.ch>, netdev <netdev@...r.kernel.org>,
Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [RFC PATCH 1/2] gianfar: convert to phylink
Hi Arseny,
Nice project!
On Wed, 24 Jul 2019 at 03:38, Arseny Solokha <asolokha@...kras.ru> wrote:
>
> Convert gianfar to use the phylink API for better SFP modules support.
>
> The driver still uses phylib for serdes configuration over the TBI
> interface, as there seems to be no functionally equivalent API present
> in phylink (yet). phylib usage is basically confined in two functions.
>
> One needs to change their Device Tree accordingly to get working SFP
> support:
>
> enet1: ethernet@...00 {
> <...>
> device_type = "network";
> model = "eTSEC";
> compatible = "gianfar";
> tbi-handle = <&tbi0>;
> + phy-connection-type = "sgmii";
> + managed = "in-band-status";
> + sfp = <&sfp>;
> max-speed = <1000>;
>
> mdio@520 {
> #address-cells = <1>;
> #size-cells = <0>;
> compatible = "fsl,gianfar-tbi";
> reg = <0x520 0x20>;
>
> tbi0: tbi-phy@1f {
> reg = <0x1f>;
> device_type = "tbi-phy";
> };
> };
> +
> + sfp: sfp0 {
> + compatible = "sff,sfp";
> + i2c-bus = <&i2c1>;
> + mod-def0-gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
> + rate-select0-gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
> + tx-disable-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
> + tx-fault-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
> + los-gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
> + };
> };
>
> Signed-off-by: Arseny Solokha <asolokha@...kras.ru>
> ---
> drivers/net/ethernet/freescale/Kconfig | 2 +-
> drivers/net/ethernet/freescale/gianfar.c | 409 +++++++++---------
> drivers/net/ethernet/freescale/gianfar.h | 26 +-
> .../net/ethernet/freescale/gianfar_ethtool.c | 79 ++--
> 4 files changed, 251 insertions(+), 265 deletions(-)
>
> diff --git a/drivers/net/ethernet/freescale/Kconfig b/drivers/net/ethernet/freescale/Kconfig
> index 6a7e8993119f..8b51d423b61d 100644
> --- a/drivers/net/ethernet/freescale/Kconfig
> +++ b/drivers/net/ethernet/freescale/Kconfig
> @@ -89,7 +89,7 @@ config GIANFAR
> tristate "Gianfar Ethernet"
> depends on HAS_DMA
> select FSL_PQ_MDIO
> - select PHYLIB
> + select PHYLINK
> select CRC32
> ---help---
> This driver supports the Gigabit TSEC on the MPC83xx, MPC85xx,
> diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
> index 7ea19e173339..64c7b174e591 100644
> --- a/drivers/net/ethernet/freescale/gianfar.c
> +++ b/drivers/net/ethernet/freescale/gianfar.c
> @@ -96,6 +96,7 @@
> #include <linux/mii.h>
> #include <linux/phy.h>
> #include <linux/phy_fixed.h>
> +#include <linux/phylink.h>
You can remove linux/phy.h.
You (PHYLINK, actually) broke .ndo_change_carrier, and therefore
commit 6211d46713c5 ("gianfar: Add change_carrier() for Fixed PHYs").
If we were honest, we should probably revert that commit entirely now.
Once you do that, you can remove linux/phy_fixed.h as well.
> #include <linux/of.h>
> #include <linux/of_net.h>
>
> @@ -117,8 +118,18 @@ static int gfar_change_mtu(struct net_device *dev, int new_mtu);
> static irqreturn_t gfar_error(int irq, void *dev_id);
> static irqreturn_t gfar_transmit(int irq, void *dev_id);
> static irqreturn_t gfar_interrupt(int irq, void *dev_id);
> -static void adjust_link(struct net_device *dev);
> -static noinline void gfar_update_link_state(struct gfar_private *priv);
> +static void gfar_phylink_validate(struct phylink_config *config,
> + unsigned long *supported,
> + struct phylink_link_state *state);
> +static int gfar_mac_link_state(struct phylink_config *config,
> + struct phylink_link_state *state);
> +static void gfar_mac_config(struct phylink_config *config, unsigned int mode,
> + const struct phylink_link_state *state);
> +static void gfar_mac_an_restart(struct phylink_config *config);
> +static void gfar_mac_link_down(struct phylink_config *config, unsigned int mode,
> + phy_interface_t interface);
> +static void gfar_mac_link_up(struct phylink_config *config, unsigned int mode,
> + phy_interface_t interface, struct phy_device *phy);
Please do not add to this forward declaration madness. A cleanup patch
in this area would be highly appreciated.
> static int init_phy(struct net_device *dev);
> static int gfar_probe(struct platform_device *ofdev);
> static int gfar_remove(struct platform_device *ofdev);
> @@ -504,6 +515,15 @@ static const struct net_device_ops gfar_netdev_ops = {
> #endif
> };
>
> +static const struct phylink_mac_ops gfar_phylink_ops = {
> + .validate = gfar_phylink_validate,
> + .mac_link_state = gfar_mac_link_state,
> + .mac_config = gfar_mac_config,
> + .mac_an_restart = gfar_mac_an_restart,
> + .mac_link_down = gfar_mac_link_down,
> + .mac_link_up = gfar_mac_link_up,
> +};
> +
> static void gfar_ints_disable(struct gfar_private *priv)
> {
> int i;
> @@ -733,6 +753,7 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
> struct gfar_private *priv = NULL;
> struct device_node *np = ofdev->dev.of_node;
> struct device_node *child = NULL;
> + struct phylink *phylink;
> u32 stash_len = 0;
> u32 stash_idx = 0;
> unsigned int num_tx_qs, num_rx_qs;
> @@ -891,11 +912,21 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
>
> err = of_property_read_string(np, "phy-connection-type", &ctype);
>
> - /* We only care about rgmii-id. The rest are autodetected */
> - if (err == 0 && !strcmp(ctype, "rgmii-id"))
> - priv->interface = PHY_INTERFACE_MODE_RGMII_ID;
> - else
> + /* We only care about rgmii-id and sgmii - the former
> + * is indistinguishable from rgmii in hardware, and phylink needs
> + * the latter to be set appropriately for correct phy configuration.
> + * The rest are autodetected
> + */
> + if (err == 0) {
> + if (!strcmp(ctype, "rgmii-id"))
> + priv->interface = PHY_INTERFACE_MODE_RGMII_ID;
> + else if (!strcmp(ctype, "sgmii"))
> + priv->interface = PHY_INTERFACE_MODE_SGMII;
> + else
> + priv->interface = PHY_INTERFACE_MODE_MII;
> + } else {
> priv->interface = PHY_INTERFACE_MODE_MII;
> + }
>
No. Don't do this. Just do:
err = of_get_phy_mode(np);
if (err < 0)
goto err_grp_init;
priv->interface = err;
> if (of_find_property(np, "fsl,magic-packet", NULL))
> priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET;
> @@ -903,19 +934,21 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
> if (of_get_property(np, "fsl,wake-on-filer", NULL))
> priv->device_flags |= FSL_GIANFAR_DEV_HAS_WAKE_ON_FILER;
>
> - priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
> + priv->device_node = np;
> + priv->speed = SPEED_UNKNOWN;
>
> - /* In the case of a fixed PHY, the DT node associated
> - * to the PHY is the Ethernet MAC DT node.
> - */
> - if (!priv->phy_node && of_phy_is_fixed_link(np)) {
> - err = of_phy_register_fixed_link(np);
> - if (err)
> - goto err_grp_init;
> + priv->phylink_config.dev = &priv->ndev->dev;
> + priv->phylink_config.type = PHYLINK_NETDEV;
>
> - priv->phy_node = of_node_get(np);
> + phylink = phylink_create(&priv->phylink_config, of_fwnode_handle(np),
> + priv->interface, &gfar_phylink_ops);
You introduced a bug here.
of_phy_connect used to take the PHY interface type (for good or bad)
from gfar_get_interface() (which is reconstructing it from the MAC
registers).
You are now passing the PHY interface type to phylink_create from the
"phy-connection-type" DT property.
At the very least, you are breaking LS1021A which uses phy-mode
instead of phy-connection-type (hence my comment above to use the
generic OF helper).
Actually I think you just uncovered a latent bug, in that the DT
bindings for phy-mode didn't mean much at all to the driver - it would
rely on what the bootloader had set up.
Actually DT bindings for phy-connection-type were most likely simply
bolt on on top of gianfar when they figured they couldn't just
auto-detect the various species of required RGMII delays.
But gfar_get_interface is a piece of history that was introduced in
the same commit as the enum phy_interface_t itself: e8a2b6a42073
("[PATCH] PHY: Add support for configuring the PHY connection
interface"). Its time has come.
> + if (IS_ERR(phylink)) {
> + err = PTR_ERR(phylink);
> + goto err_grp_init;
> }
>
> + priv->phylink = phylink;
> +
> /* Find the TBI PHY. If it's not there, we don't support SGMII */
> priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0);
>
> @@ -994,7 +1027,7 @@ static int gfar_hwtstamp_get(struct net_device *netdev, struct ifreq *ifr)
>
> static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
> {
> - struct phy_device *phydev = dev->phydev;
> + struct gfar_private *priv = netdev_priv(dev);
>
> if (!netif_running(dev))
> return -EINVAL;
> @@ -1004,10 +1037,7 @@ static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
> if (cmd == SIOCGHWTSTAMP)
> return gfar_hwtstamp_get(dev, rq);
>
> - if (!phydev)
> - return -ENODEV;
> -
> - return phy_mii_ioctl(phydev, rq, cmd);
> + return phylink_mii_ioctl(priv->phylink, rq, cmd);
> }
>
> static u32 cluster_entry_per_class(struct gfar_private *priv, u32 rqfar,
> @@ -1307,7 +1337,6 @@ static void gfar_init_addr_hash_table(struct gfar_private *priv)
> */
> static int gfar_probe(struct platform_device *ofdev)
> {
> - struct device_node *np = ofdev->dev.of_node;
> struct net_device *dev = NULL;
> struct gfar_private *priv = NULL;
> int err = 0, i;
> @@ -1463,12 +1492,10 @@ static int gfar_probe(struct platform_device *ofdev)
> return 0;
>
> register_fail:
> - if (of_phy_is_fixed_link(np))
> - of_phy_deregister_fixed_link(np);
> unmap_group_regs(priv);
> gfar_free_rx_queues(priv);
> gfar_free_tx_queues(priv);
> - of_node_put(priv->phy_node);
> + phylink_destroy(priv->phylink);
> of_node_put(priv->tbi_node);
> free_gfar_dev(priv);
> return err;
> @@ -1477,19 +1504,15 @@ static int gfar_probe(struct platform_device *ofdev)
> static int gfar_remove(struct platform_device *ofdev)
> {
> struct gfar_private *priv = platform_get_drvdata(ofdev);
> - struct device_node *np = ofdev->dev.of_node;
>
> - of_node_put(priv->phy_node);
> of_node_put(priv->tbi_node);
>
> unregister_netdev(priv->ndev);
>
> - if (of_phy_is_fixed_link(np))
> - of_phy_deregister_fixed_link(np);
> -
> unmap_group_regs(priv);
> gfar_free_rx_queues(priv);
> gfar_free_tx_queues(priv);
> + phylink_destroy(priv->phylink);
> free_gfar_dev(priv);
>
> return 0;
> @@ -1643,9 +1666,11 @@ static int gfar_suspend(struct device *dev)
> gfar_start_wol_filer(priv);
>
> } else {
> - phy_stop(ndev->phydev);
> + phylink_stop(phy->phylink);
> }
>
> + priv->speed = SPEED_UNKNOWN;
> +
> return 0;
> }
>
> @@ -1672,7 +1697,7 @@ static int gfar_resume(struct device *dev)
> gfar_filer_restore_table(priv);
>
> } else {
> - phy_start(ndev->phydev);
> + phylink_start(priv->phylink);
> }
>
> gfar_start(priv);
> @@ -1702,12 +1727,7 @@ static int gfar_restore(struct device *dev)
>
> gfar_start(priv);
>
> - priv->oldlink = 0;
> - priv->oldspeed = 0;
> - priv->oldduplex = -1;
> -
> - if (ndev->phydev)
> - phy_start(ndev->phydev);
> + phylink_start(priv->phylink);
>
> netif_device_attach(ndev);
> enable_napi(priv);
> @@ -1781,46 +1801,26 @@ static phy_interface_t gfar_get_interface(struct net_device *dev)
> */
> static int init_phy(struct net_device *dev)
> {
> - __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
> struct gfar_private *priv = netdev_priv(dev);
> phy_interface_t interface;
> - struct phy_device *phydev;
> struct ethtool_eee edata;
> + int flags = 0;
> + int err;
>
> - linkmode_set_bit_array(phy_10_100_features_array,
> - ARRAY_SIZE(phy_10_100_features_array),
> - mask);
> - linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, mask);
> - linkmode_set_bit(ETHTOOL_LINK_MODE_MII_BIT, mask);
> - if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT)
> - linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, mask);
> -
> - priv->oldlink = 0;
> - priv->oldspeed = 0;
> - priv->oldduplex = -1;
> -
> - interface = gfar_get_interface(dev);
> -
> - phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0,
> - interface);
> - if (!phydev) {
> - dev_err(&dev->dev, "could not attach to PHY\n");
> - return -ENODEV;
> + err = phylink_of_phy_connect(priv->phylink, priv->device_node, flags);
> + if (err) {
> + netdev_err(dev, "could not attach to PHY: %d\n", err);
> + return err;
While you're at it, can you say "connect" instead of "attach" here?
> }
>
> + priv->tbi_phy = NULL;
> + interface = gfar_get_interface(dev);
Be consistent and just go for priv->interface. Nobody's changing it anyway.
> if (interface == PHY_INTERFACE_MODE_SGMII)
> gfar_configure_serdes(dev);
>
My gut feeling says that this should be moved to gfar_mac_config.
> - /* Remove any features not supported by the controller */
> - linkmode_and(phydev->supported, phydev->supported, mask);
> - linkmode_copy(phydev->advertising, phydev->supported);
> -
> - /* Add support for flow control */
> - phy_support_asym_pause(phydev);
> -
> /* disable EEE autoneg, EEE not supported by eTSEC */
> memset(&edata, 0, sizeof(struct ethtool_eee));
> - phy_ethtool_set_eee(phydev, &edata);
> + phylink_ethtool_set_eee(priv->phylink, &edata);
>
> return 0;
> }
> @@ -1850,6 +1850,8 @@ static void gfar_configure_serdes(struct net_device *dev)
> return;
> }
>
> + priv->tbi_phy = tbiphy;
> +
> /* If the link is already up, we must already be ok, and don't need to
> * configure and reset the TBI<->SerDes link. Maybe U-Boot configured
> * everything for us? Resetting it takes the link down and requires
> @@ -1964,7 +1966,7 @@ void stop_gfar(struct net_device *dev)
> /* disable ints and gracefully shut down Rx/Tx DMA */
> gfar_halt(priv);
>
> - phy_stop(dev->phydev);
> + phylink_stop(priv->phylink);
>
> free_skb_resources(priv);
> }
> @@ -2219,12 +2221,7 @@ int startup_gfar(struct net_device *ndev)
> /* Start Rx/Tx DMA and enable the interrupts */
> gfar_start(priv);
>
> - /* force link state update after mac reset */
> - priv->oldlink = 0;
> - priv->oldspeed = 0;
> - priv->oldduplex = -1;
> -
> - phy_start(ndev->phydev);
> + phylink_start(priv->phylink);
>
> enable_napi(priv);
>
> @@ -2593,7 +2590,7 @@ static int gfar_close(struct net_device *dev)
> stop_gfar(dev);
>
> /* Disconnect from the PHY */
> - phy_disconnect(dev->phydev);
> + phylink_disconnect_phy(priv->phylink);
It is very odd to disconnect from the PHY on ndo_close and connect
back on ndo_open. I don't know of any other driver that does that.
Can't you change the behavior to simply start and stop phylink here?
>
> gfar_free_irq(priv);
>
> @@ -3387,23 +3384,6 @@ static irqreturn_t gfar_interrupt(int irq, void *grp_id)
> return IRQ_HANDLED;
> }
>
> -/* Called every time the controller might need to be made
> - * aware of new link state. The PHY code conveys this
> - * information through variables in the phydev structure, and this
> - * function converts those variables into the appropriate
> - * register values, and can bring down the device if needed.
> - */
> -static void adjust_link(struct net_device *dev)
> -{
> - struct gfar_private *priv = netdev_priv(dev);
> - struct phy_device *phydev = dev->phydev;
> -
> - if (unlikely(phydev->link != priv->oldlink ||
> - (phydev->link && (phydev->duplex != priv->oldduplex ||
> - phydev->speed != priv->oldspeed))))
> - gfar_update_link_state(priv);
> -}
Getting rid of the cruft from this function deserves its own patch.
> -
> /* Update the hash table based on the current list of multicast
> * addresses we subscribe to. Also, change the promiscuity of
> * the device based on the flags (this function is called
> @@ -3635,132 +3615,169 @@ static irqreturn_t gfar_error(int irq, void *grp_id)
> return IRQ_HANDLED;
> }
>
> -static u32 gfar_get_flowctrl_cfg(struct gfar_private *priv)
> +static void gfar_phylink_validate(struct phylink_config *config,
> + unsigned long *supported,
> + struct phylink_link_state *state)
> +{
> + struct gfar_private *priv = netdev_priv(to_net_dev(config->dev));
> + __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
> +
> + if (state->interface != PHY_INTERFACE_MODE_NA &&
> + state->interface != PHY_INTERFACE_MODE_SGMII &&
> + state->interface != PHY_INTERFACE_MODE_1000BASEX &&
Russell is right, you shouldn't advertise 1000Base-X if there is no
way of making sure that it works.
His question was:
> How is the difference between SGMII and 1000BASE-X handled?
To be honest I don't have a complete answer to that question. The
literature recommends writing 0x01a0 to the MII_ADVERTISE (0x4)
register of the MAC PCS for 1000Base-X, and 0x4001 for SGMII.
The FMan driver which uses the TSEC MAC does exactly that:
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/tree/drivers/net/ethernet/freescale/fman/fman_dtsec.c#n58
However I can't seem to be able to trace down the definition of bit 14
from 0x4001 - it's reserved in all the manuals I see. I have a hunch
that it selects the format of the Config_Reg base page between
1000Base-X and SGMII.
But the bad news is that gianfar is only configuring the TBI PHY for
the 1000Base-X Config_Reg, even for SGMII PHYs. I'm not quite sure,
but I think that the only reason that this doesn't break in-band AN is
that we don't use in-band AN.
> + !phy_interface_mode_is_rgmii(state->interface)) {
> + phylink_zero(supported);
> + return;
> + }
> +
> + phylink_set(mask, Autoneg);
> + phylink_set(mask, Pause);
> + phylink_set(mask, Asym_Pause);
> + phylink_set_port_modes(mask);
> +
> + phylink_set(mask, 10baseT_Half);
> + phylink_set(mask, 10baseT_Full);
> + phylink_set(mask, 100baseT_Half);
> + phylink_set(mask, 100baseT_Full);
> +
> + if (priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT) {
> + phylink_set(mask, 1000baseX_Full);
> + phylink_set(mask, 1000baseT_Full);
> + }
> +
> + linkmode_and(supported, supported, mask);
> + linkmode_and(state->advertising, state->advertising, mask);
> +}
> +
> +static int gfar_mac_link_state(struct phylink_config *config,
> + struct phylink_link_state *state)
> +{
> + if (state->interface == PHY_INTERFACE_MODE_SGMII ||
> + state->interface == PHY_INTERFACE_MODE_1000BASEX) {
What if you reduce the indentation level by 1 here, by just exiting if
the interface mode is not SGMII?
> + struct gfar_private *priv =
> + netdev_priv(to_net_dev(config->dev));
> + u16 tbi_cr;
> +
> + if (!priv->tbi_phy)
> + return -ENODEV;
> +
> + tbi_cr = phy_read(priv->tbi_phy, MII_TBI_CR);
> +
> + state->duplex = !!(tbi_cr & TBI_CR_FULL_DUPLEX);
Woah there. Aren't you supposed to first ensure state->an_complete is
ok, based on TBI_MII_Register_Set_SR[AN_Done]? There's also a
Link_Status bit in that register that you could retrieve.
> + if ((tbi_cr & TBI_CR_SPEED_1000_MASK) == TBI_CR_SPEED_1000_MASK)
> + state->speed = SPEED_1000;
> + }
See the Speed_Bit table from TBI_MII_Register_Set_ANLPBPA_SGMII for
the link partner (aka SGMII PHY) advertisement. You have to do a
logical-and between that and your own. Also please make sure you
really are in SGMII AN and not 1000 Base-X when interpreting registers
4 & 5 as one way or another.
> +
> + return 1;
> +}
> +
> +static u32 gfar_get_flowctrl_cfg(const struct phylink_link_state *state)
> {
> - struct net_device *ndev = priv->ndev;
> - struct phy_device *phydev = ndev->phydev;
> u32 val = 0;
>
> - if (!phydev->duplex)
> + if (!state->duplex)
> return val;
>
> - if (!priv->pause_aneg_en) {
> - if (priv->tx_pause_en)
> - val |= MACCFG1_TX_FLOW;
> - if (priv->rx_pause_en)
> - val |= MACCFG1_RX_FLOW;
> - } else {
> - u16 lcl_adv, rmt_adv;
> - u8 flowctrl;
> - /* get link partner capabilities */
> - rmt_adv = 0;
> - if (phydev->pause)
> - rmt_adv = LPA_PAUSE_CAP;
> - if (phydev->asym_pause)
> - rmt_adv |= LPA_PAUSE_ASYM;
> -
> - lcl_adv = linkmode_adv_to_lcl_adv_t(phydev->advertising);
> - flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv);
> - if (flowctrl & FLOW_CTRL_TX)
> - val |= MACCFG1_TX_FLOW;
> - if (flowctrl & FLOW_CTRL_RX)
> - val |= MACCFG1_RX_FLOW;
> - }
> + if (state->pause & MLO_PAUSE_TX)
> + val |= MACCFG1_TX_FLOW;
> + if (state->pause & MLO_PAUSE_RX)
> + val |= MACCFG1_RX_FLOW;
>
> return val;
> }
>
> -static noinline void gfar_update_link_state(struct gfar_private *priv)
> +static void gfar_mac_config(struct phylink_config *config, unsigned int mode,
> + const struct phylink_link_state *state)
> {
> + struct gfar_private *priv = netdev_priv(to_net_dev(config->dev));
> struct gfar __iomem *regs = priv->gfargrp[0].regs;
> - struct net_device *ndev = priv->ndev;
> - struct phy_device *phydev = ndev->phydev;
> - struct gfar_priv_rx_q *rx_queue = NULL;
> - int i;
> + u32 maccfg1, new_maccfg1;
> + u32 maccfg2, new_maccfg2;
> + u32 ecntrl, new_ecntrl;
> + u32 tx_flow, new_tx_flow;
Don't introduce new_ variables. Is there any issue if you
unconditionally write to the MAC registers?
>
> if (unlikely(test_bit(GFAR_RESETTING, &priv->state)))
> return;
>
> - if (phydev->link) {
> - u32 tempval1 = gfar_read(®s->maccfg1);
> - u32 tempval = gfar_read(®s->maccfg2);
> - u32 ecntrl = gfar_read(®s->ecntrl);
> - u32 tx_flow_oldval = (tempval1 & MACCFG1_TX_FLOW);
> + if (unlikely(phylink_autoneg_inband(mode)))
> + return;
>
> - if (phydev->duplex != priv->oldduplex) {
> - if (!(phydev->duplex))
> - tempval &= ~(MACCFG2_FULL_DUPLEX);
> - else
> - tempval |= MACCFG2_FULL_DUPLEX;
> + maccfg1 = gfar_read(®s->maccfg1);
> + maccfg2 = gfar_read(®s->maccfg2);
> + ecntrl = gfar_read(®s->ecntrl);
>
> - priv->oldduplex = phydev->duplex;
> - }
> + new_maccfg2 = maccfg2 & ~(MACCFG2_FULL_DUPLEX | MACCFG2_IF);
> + new_ecntrl = ecntrl & ~ECNTRL_R100;
>
> - if (phydev->speed != priv->oldspeed) {
> - switch (phydev->speed) {
> - case 1000:
> - tempval =
> - ((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
> + if (state->duplex)
> + new_maccfg2 |= MACCFG2_FULL_DUPLEX;
>
> - ecntrl &= ~(ECNTRL_R100);
> - break;
> - case 100:
> - case 10:
> - tempval =
> - ((tempval & ~(MACCFG2_IF)) | MACCFG2_MII);
> -
> - /* Reduced mode distinguishes
> - * between 10 and 100
> - */
> - if (phydev->speed == SPEED_100)
> - ecntrl |= ECNTRL_R100;
> - else
> - ecntrl &= ~(ECNTRL_R100);
> - break;
> - default:
> - netif_warn(priv, link, priv->ndev,
> - "Ack! Speed (%d) is not 10/100/1000!\n",
> - phydev->speed);
Please 1. remove "Ack!" 2. treat SPEED_UNKNOWN here by setting the MAC
into a low-power state (e.g. 10 Mbps - the power savings are real).
Don't print that Speed -1 is not 10/100/1000, we know that.
> - break;
> - }
> -
> - priv->oldspeed = phydev->speed;
> - }
> -
> - tempval1 &= ~(MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
> - tempval1 |= gfar_get_flowctrl_cfg(priv);
> -
> - /* Turn last free buffer recording on */
> - if ((tempval1 & MACCFG1_TX_FLOW) && !tx_flow_oldval) {
> - for (i = 0; i < priv->num_rx_queues; i++) {
> - u32 bdp_dma;
> -
> - rx_queue = priv->rx_queue[i];
> - bdp_dma = gfar_rxbd_dma_lastfree(rx_queue);
> - gfar_write(rx_queue->rfbptr, bdp_dma);
> - }
> -
> - priv->tx_actual_en = 1;
> - }
> -
> - if (unlikely(!(tempval1 & MACCFG1_TX_FLOW) && tx_flow_oldval))
> - priv->tx_actual_en = 0;
> -
> - gfar_write(®s->maccfg1, tempval1);
> - gfar_write(®s->maccfg2, tempval);
> - gfar_write(®s->ecntrl, ecntrl);
> -
> - if (!priv->oldlink)
> - priv->oldlink = 1;
> -
> - } else if (priv->oldlink) {
> - priv->oldlink = 0;
> - priv->oldspeed = 0;
> - priv->oldduplex = -1;
> + switch (state->speed) {
> + case SPEED_1000:
> + new_maccfg2 |= MACCFG2_GMII;
> + break;
> + case SPEED_100:
> + new_maccfg2 |= MACCFG2_MII;
> + new_ecntrl = ecntrl | ECNTRL_R100;
> + break;
> + case SPEED_10:
> + new_maccfg2 |= MACCFG2_MII;
> + break;
> + default:
> + netif_warn(priv, link, priv->ndev,
> + "Ack! Speed (%d) is not 10/100/1000!\n",
> + state->speed);
> + return;
> }
>
> - if (netif_msg_link(priv))
> - phy_print_status(phydev);
> + priv->speed = state->speed;
> +
> + new_maccfg1 = maccfg1 & ~(MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
> + new_maccfg1 |= gfar_get_flowctrl_cfg(state);
> +
> + /* Turn last free buffer recording on */
> + tx_flow = maccfg1 & MACCFG1_TX_FLOW;
> + new_tx_flow = new_maccfg1 & MACCFG1_TX_FLOW;
> + if (new_tx_flow && !tx_flow) {
> + int i;
> +
> + for (i = 0; i < priv->num_rx_queues; i++) {
> + struct gfar_priv_rx_q *rx_queue;
> + u32 bdp_dma;
> +
> + rx_queue = priv->rx_queue[i];
> + bdp_dma = gfar_rxbd_dma_lastfree(rx_queue);
> + gfar_write(rx_queue->rfbptr, bdp_dma);
> + }
> +
> + priv->tx_actual_en = 1;
> + } else if (unlikely(!new_tx_flow && tx_flow)) {
> + priv->tx_actual_en = 0;
> + }
> +
> + if (new_maccfg1 != maccfg1)
> + gfar_write(®s->maccfg1, new_maccfg1);
> + if (new_maccfg2 != maccfg2)
> + gfar_write(®s->maccfg2, new_maccfg2);
> + if (new_ecntrl != ecntrl)
> + gfar_write(®s->ecntrl, new_ecntrl);
> +}
> +
> +static void gfar_mac_an_restart(struct phylink_config *config)
> +{
> + /* Not supported */
> +}
What about running gfar_configure_serdes again?
> +
> +static void gfar_mac_link_down(struct phylink_config *config, unsigned int mode,
> + phy_interface_t interface)
> +{
> + /* Not supported */
> +}
> +
What about disabling RX_EN and TX_EN from MACCFG1?
> +static void gfar_mac_link_up(struct phylink_config *config, unsigned int mode,
> + phy_interface_t interface, struct phy_device *phy)
> +{
> + /* Not supported */
> }
>
What about enabling RX_EN and TX_EN from MACCFG1?
> static const struct of_device_id gfar_match[] =
> diff --git a/drivers/net/ethernet/freescale/gianfar.h b/drivers/net/ethernet/freescale/gianfar.h
> index f2af96349c7b..0b28b1f60f2d 100644
> --- a/drivers/net/ethernet/freescale/gianfar.h
> +++ b/drivers/net/ethernet/freescale/gianfar.h
> @@ -31,8 +31,7 @@
> #include <linux/skbuff.h>
> #include <linux/spinlock.h>
> #include <linux/mm.h>
> -#include <linux/mii.h>
> -#include <linux/phy.h>
> +#include <linux/phylink.h>
>
> #include <asm/io.h>
> #include <asm/irq.h>
> @@ -149,8 +148,13 @@ extern const char gfar_driver_version[];
> #define GFAR_SUPPORTED_GBIT SUPPORTED_1000baseT_Full
>
> /* TBI register addresses */
> +#define MII_TBI_CR 0x00
> #define MII_TBICON 0x11
>
> +/* TBI_CR register bit fields */
> +#define TBI_CR_FULL_DUPLEX 0x0100
> +#define TBI_CR_SPEED_1000_MASK 0x0040
> +
I think BIT() definitions are preferred, even if that means you have
to convert existing code first.
> /* TBICON register bit fields */
> #define TBICON_CLK_SELECT 0x0020
>
> @@ -1148,12 +1152,12 @@ struct gfar_private {
>
> /* PHY stuff */
> phy_interface_t interface;
> - struct device_node *phy_node;
> + struct device_node *device_node;
> struct device_node *tbi_node;
> - struct mii_bus *mii_bus;
> - int oldspeed;
> - int oldduplex;
> - int oldlink;
> + struct phylink *phylink;
> + struct phylink_config phylink_config;
> + struct phy_device *tbi_phy;
> + int speed;
>
> uint32_t msg_enable;
>
> @@ -1165,11 +1169,7 @@ struct gfar_private {
> bd_stash_en:1,
> rx_filer_enable:1,
> /* Enable priorty based Tx scheduling in Hw */
> - prio_sched_en:1,
> - /* Flow control flags */
> - pause_aneg_en:1,
> - tx_pause_en:1,
> - rx_pause_en:1;
> + prio_sched_en:1;
>
> /* The total tx and rx ring size for the enabled queues */
> unsigned int total_tx_ring_size;
> @@ -1333,8 +1333,6 @@ void reset_gfar(struct net_device *dev);
> void gfar_mac_reset(struct gfar_private *priv);
> void gfar_halt(struct gfar_private *priv);
> void gfar_start(struct gfar_private *priv);
> -void gfar_phy_test(struct mii_bus *bus, struct phy_device *phydev, int enable,
> - u32 regnum, u32 read);
> void gfar_configure_coalescing_all(struct gfar_private *priv);
> int gfar_set_features(struct net_device *dev, netdev_features_t features);
>
> diff --git a/drivers/net/ethernet/freescale/gianfar_ethtool.c b/drivers/net/ethernet/freescale/gianfar_ethtool.c
> index 3433b46b90c1..146b30d07789 100644
> --- a/drivers/net/ethernet/freescale/gianfar_ethtool.c
> +++ b/drivers/net/ethernet/freescale/gianfar_ethtool.c
> @@ -35,7 +35,7 @@
> #include <asm/types.h>
> #include <linux/ethtool.h>
> #include <linux/mii.h>
> -#include <linux/phy.h>
> +#include <linux/phylink.h>
> #include <linux/sort.h>
> #include <linux/if_vlan.h>
> #include <linux/of_platform.h>
> @@ -207,12 +207,10 @@ static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs,
> static unsigned int gfar_usecs2ticks(struct gfar_private *priv,
> unsigned int usecs)
> {
> - struct net_device *ndev = priv->ndev;
> - struct phy_device *phydev = ndev->phydev;
Are you sure this still works? You missed a ndev->phydev check from
gfar_gcoalesce, where this is called from. Technically you can still
check ndev->phydev, it's just that PHYLINK doesn't guarantee you'll
have one (e.g. fixed-link interfaces).
> unsigned int count;
>
> /* The timer is different, depending on the interface speed */
> - switch (phydev->speed) {
> + switch (priv->speed) {
What about retrieving the speed from phylink_ethtool_ksettings_get,
and using that here? This would save you from introducing a cached
priv->speed.
> case SPEED_1000:
> count = GFAR_GBIT_TIME;
> break;
> @@ -234,12 +232,10 @@ static unsigned int gfar_usecs2ticks(struct gfar_private *priv,
> static unsigned int gfar_ticks2usecs(struct gfar_private *priv,
> unsigned int ticks)
> {
> - struct net_device *ndev = priv->ndev;
> - struct phy_device *phydev = ndev->phydev;
> unsigned int count;
>
> /* The timer is different, depending on the interface speed */
> - switch (phydev->speed) {
> + switch (priv->speed) {
Same comments as above, but for gfar_scoalesce.
> case SPEED_1000:
> count = GFAR_GBIT_TIME;
> break;
> @@ -489,58 +485,15 @@ static void gfar_gpauseparam(struct net_device *dev,
> {
> struct gfar_private *priv = netdev_priv(dev);
>
> - epause->autoneg = !!priv->pause_aneg_en;
> - epause->rx_pause = !!priv->rx_pause_en;
> - epause->tx_pause = !!priv->tx_pause_en;
> + phylink_ethtool_get_pauseparam(priv->phylink, epause);
> }
>
> static int gfar_spauseparam(struct net_device *dev,
> struct ethtool_pauseparam *epause)
> {
> struct gfar_private *priv = netdev_priv(dev);
> - struct phy_device *phydev = dev->phydev;
> - struct gfar __iomem *regs = priv->gfargrp[0].regs;
>
> - if (!phydev)
> - return -ENODEV;
> -
> - if (!phy_validate_pause(phydev, epause))
> - return -EINVAL;
> -
> - priv->rx_pause_en = priv->tx_pause_en = 0;
> - phy_set_asym_pause(phydev, epause->rx_pause, epause->tx_pause);
> - if (epause->rx_pause) {
> - priv->rx_pause_en = 1;
> -
> - if (epause->tx_pause) {
> - priv->tx_pause_en = 1;
> - }
> - } else if (epause->tx_pause) {
> - priv->tx_pause_en = 1;
> - }
> -
> - if (epause->autoneg)
> - priv->pause_aneg_en = 1;
> - else
> - priv->pause_aneg_en = 0;
> -
> - if (!epause->autoneg) {
> - u32 tempval = gfar_read(®s->maccfg1);
> -
> - tempval &= ~(MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
> -
> - priv->tx_actual_en = 0;
> - if (priv->tx_pause_en) {
> - priv->tx_actual_en = 1;
> - tempval |= MACCFG1_TX_FLOW;
> - }
> -
> - if (priv->rx_pause_en)
> - tempval |= MACCFG1_RX_FLOW;
> - gfar_write(®s->maccfg1, tempval);
> - }
> -
> - return 0;
> + return phylink_ethtool_set_pauseparam(priv->phylink, epause);
> }
>
> int gfar_set_features(struct net_device *dev, netdev_features_t features)
> @@ -1519,6 +1472,24 @@ static int gfar_get_ts_info(struct net_device *dev,
> return 0;
> }
>
> +/* Set link ksettings (phy address, speed) for ethtools */
ethtool, not ethtools. Also, I'm not quite sure what you mean by
setting the "phy address" with ethtool.
> +static int gfar_get_link_ksettings(struct net_device *dev,
> + struct ethtool_link_ksettings *cmd)
> +{
> + struct gfar_private *priv = netdev_priv(dev);
> +
> + return phylink_ethtool_ksettings_get(priv->phylink, cmd);
> +}
> +
> +/* Get link ksettings for ethtools */
> +static int gfar_set_link_ksettings(struct net_device *dev,
> + const struct ethtool_link_ksettings *cmd)
> +{
> + struct gfar_private *priv = netdev_priv(dev);
> +
> + return phylink_ethtool_ksettings_set(priv->phylink, cmd);
> +}
> +
> const struct ethtool_ops gfar_ethtool_ops = {
> .get_drvinfo = gfar_gdrvinfo,
> .get_regs_len = gfar_reglen,
> @@ -1542,6 +1513,6 @@ const struct ethtool_ops gfar_ethtool_ops = {
> .set_rxnfc = gfar_set_nfc,
> .get_rxnfc = gfar_get_nfc,
> .get_ts_info = gfar_get_ts_info,
> - .get_link_ksettings = phy_ethtool_get_link_ksettings,
> - .set_link_ksettings = phy_ethtool_set_link_ksettings,
> + .get_link_ksettings = gfar_get_link_ksettings,
> + .set_link_ksettings = gfar_set_link_ksettings,
> };
> --
> 2.22.0
>
Thanks a lot for doing this!
-Vladimir
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