Hi Andrew,
Thanks, review comments for Antoine below.
On Fri, Oct 18, 2019 at 09:08:10PM +0200, Andrew Lunn wrote:
> On Fri, Oct 18, 2019 at 04:39:24PM +0200, Antoine Tenart wrote:
> > This patch converts the MACB Ethernet driver to the Phylink framework.
> > The MAC configuration is moved to the Phylink ops and Phylink helpers
> > are now used in the ethtools functions.
What seems to be missing is "why". It isn't obvious from the patch why
this conversion is being done...
> > Signed-off-by: Antoine Tenart <antoine.ten...@bootlin.com>
>
> Hi Antoine
>
> Please include Russell King on any phylink patches.
>
> Thanks
> Andrew
>
> > ---
> > drivers/net/ethernet/cadence/Kconfig | 2 +-
> > drivers/net/ethernet/cadence/macb.h | 7 +-
> > drivers/net/ethernet/cadence/macb_main.c | 439 +++++++++++++----------
> > 3 files changed, 252 insertions(+), 196 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/cadence/Kconfig
> > b/drivers/net/ethernet/cadence/Kconfig
> > index f4b3bd85dfe3..53b50c24d9c9 100644
> > --- a/drivers/net/ethernet/cadence/Kconfig
> > +++ b/drivers/net/ethernet/cadence/Kconfig
> > @@ -22,7 +22,7 @@ if NET_VENDOR_CADENCE
> > config MACB
> > tristate "Cadence MACB/GEM support"
> > depends on HAS_DMA && COMMON_CLK
> > - select PHYLIB
> > + select PHYLINK
> > ---help---
> > The Cadence MACB ethernet interface is found on many Atmel AT32 and
> > AT91 parts. This driver also supports the Cadence GEM (Gigabit
> > diff --git a/drivers/net/ethernet/cadence/macb.h
> > b/drivers/net/ethernet/cadence/macb.h
> > index 03983bd46eef..63fdf81eae47 100644
> > --- a/drivers/net/ethernet/cadence/macb.h
> > +++ b/drivers/net/ethernet/cadence/macb.h
> > @@ -7,7 +7,7 @@
> > #ifndef _MACB_H
> > #define _MACB_H
> >
> > -#include <linux/phy.h>
> > +#include <linux/phylink.h>
> > #include <linux/ptp_clock_kernel.h>
> > #include <linux/net_tstamp.h>
> > #include <linux/interrupt.h>
> > @@ -1186,9 +1186,8 @@ struct macb {
> >
> > struct mii_bus *mii_bus;
> > struct device_node *phy_node;
> > - int link;
> > - int speed;
> > - int duplex;
> > + struct phylink *phylink;
> > + struct phylink_config phylink_config;
> >
> > u32 caps;
> > unsigned int dma_burst_length;
> > diff --git a/drivers/net/ethernet/cadence/macb_main.c
> > b/drivers/net/ethernet/cadence/macb_main.c
> > index 8e8d557901a9..effa333aa569 100644
> > --- a/drivers/net/ethernet/cadence/macb_main.c
> > +++ b/drivers/net/ethernet/cadence/macb_main.c
> > @@ -25,7 +25,7 @@
> > #include <linux/dma-mapping.h>
> > #include <linux/platform_data/macb.h>
> > #include <linux/platform_device.h>
> > -#include <linux/phy.h>
> > +#include <linux/phylink.h>
> > #include <linux/of.h>
> > #include <linux/of_device.h>
> > #include <linux/of_gpio.h>
> > @@ -388,6 +388,27 @@ static int macb_mdio_write(struct mii_bus *bus, int
> > mii_id, int regnum,
> > return status;
> > }
> >
> > +static void macb_init_buffers(struct macb *bp)
> > +{
> > + struct macb_queue *queue;
> > + unsigned int q;
> > +
> > + for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
> > + queue_writel(queue, RBQP, lower_32_bits(queue->rx_ring_dma));
> > +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
> > + if (bp->hw_dma_cap & HW_DMA_CAP_64B)
> > + queue_writel(queue, RBQPH,
> > + upper_32_bits(queue->rx_ring_dma));
> > +#endif
> > + queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
> > +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
> > + if (bp->hw_dma_cap & HW_DMA_CAP_64B)
> > + queue_writel(queue, TBQPH,
> > + upper_32_bits(queue->tx_ring_dma));
> > +#endif
> > + }
> > +}
> > +
> > /**
> > * macb_set_tx_clk() - Set a clock to a new frequency
> > * @clk Pointer to the clock to change
> > @@ -432,70 +453,194 @@ static void macb_set_tx_clk(struct clk *clk, int
> > speed, struct net_device *dev)
> > netdev_err(dev, "adjusting tx_clk failed.\n");
> > }
> >
> > -static void macb_handle_link_change(struct net_device *dev)
> > +static void macb_validate(struct phylink_config *config,
> > + unsigned long *supported,
> > + struct phylink_link_state *state)
> > {
> > - struct macb *bp = netdev_priv(dev);
> > - struct phy_device *phydev = dev->phydev;
> > + struct net_device *ndev = to_net_dev(config->dev);
> > + __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
> > + struct macb *bp = netdev_priv(ndev);
> > +
> > + /* We only support MII, RMII, GMII, RGMII & SGMII. */
> > + if (state->interface != PHY_INTERFACE_MODE_NA &&
> > + state->interface != PHY_INTERFACE_MODE_MII &&
> > + state->interface != PHY_INTERFACE_MODE_RMII &&
> > + state->interface != PHY_INTERFACE_MODE_GMII &&
> > + state->interface != PHY_INTERFACE_MODE_SGMII &&
> > + !phy_interface_mode_is_rgmii(state->interface)) {
> > + bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
> > + return;
> > + }
> > +
> > + if (!macb_is_gem(bp) &&
> > + (state->interface == PHY_INTERFACE_MODE_GMII ||
> > + phy_interface_mode_is_rgmii(state->interface))) {
> > + bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
> > + return;
> > + }
> > +
> > + phylink_set_port_modes(mask);
> > + phylink_set(mask, Autoneg);
> > + phylink_set(mask, Asym_Pause);
> > +
> > + phylink_set(mask, 10baseT_Half);
> > + phylink_set(mask, 10baseT_Full);
> > + phylink_set(mask, 100baseT_Half);
> > + phylink_set(mask, 100baseT_Full);
> > +
> > + if (bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE &&
> > + (state->interface == PHY_INTERFACE_MODE_NA ||
> > + state->interface == PHY_INTERFACE_MODE_GMII ||
> > + state->interface == PHY_INTERFACE_MODE_SGMII ||
> > + phy_interface_mode_is_rgmii(state->interface))) {
> > + phylink_set(mask, 1000baseT_Full);
> > + phylink_set(mask, 1000baseX_Full);
> > +
> > + if (!(bp->caps & MACB_CAPS_NO_GIGABIT_HALF))
> > + phylink_set(mask, 1000baseT_Half);
> > + }
> > +
> > + bitmap_and(supported, supported, mask, __ETHTOOL_LINK_MODE_MASK_NBITS);
> > + bitmap_and(state->advertising, state->advertising, mask,
> > + __ETHTOOL_LINK_MODE_MASK_NBITS);
This looks fine.
> > +}
> > +
> > +static int macb_mac_link_state(struct phylink_config *config,
> > + struct phylink_link_state *state)
> > +{
> > + return -EOPNOTSUPP;
Without this implemented, phylink can't support in-band link modes
necessary for SFP support. Since phylink is mostly about supporting
SFP cages and similar, I'm not sure what the point is.
Is there a future patch to add something here?
> > +}
> > +
> > +static void macb_mac_an_restart(struct phylink_config *config)
> > +{
> > + /* Not supported */
> > +}
> > +
> > +static void macb_mac_config(struct phylink_config *config, unsigned int
> > mode,
> > + const struct phylink_link_state *state)
> > +{
> > + struct net_device *ndev = to_net_dev(config->dev);
> > + struct macb *bp = netdev_priv(ndev);
> > unsigned long flags;
> > - int status_change = 0;
> > + u32 old_ctrl, ctrl;
> >
> > spin_lock_irqsave(&bp->lock, flags);
> >
> > - if (phydev->link) {
> > - if ((bp->speed != phydev->speed) ||
> > - (bp->duplex != phydev->duplex)) {
> > - u32 reg;
> > + old_ctrl = ctrl = macb_or_gem_readl(bp, NCFGR);
> >
> > - reg = macb_readl(bp, NCFGR);
> > - reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
> > - if (macb_is_gem(bp))
> > - reg &= ~GEM_BIT(GBE);
> > + /* Clear all the bits we might set later */
> > + ctrl &= ~(GEM_BIT(GBE) | MACB_BIT(SPD) | MACB_BIT(FD) | MACB_BIT(PAE) |
> > + GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL));
> >
> > - if (phydev->duplex)
> > - reg |= MACB_BIT(FD);
> > - if (phydev->speed == SPEED_100)
> > - reg |= MACB_BIT(SPD);
> > - if (phydev->speed == SPEED_1000 &&
> > - bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE)
> > - reg |= GEM_BIT(GBE);
> > + if (state->speed == SPEED_1000)
> > + ctrl |= GEM_BIT(GBE);
> > + else if (state->speed == SPEED_100)
> > + ctrl |= MACB_BIT(SPD);
> >
> > - macb_or_gem_writel(bp, NCFGR, reg);
> > + if (state->duplex)
> > + ctrl |= MACB_BIT(FD);
> >
> > - bp->speed = phydev->speed;
> > - bp->duplex = phydev->duplex;
> > - status_change = 1;
> > - }
> > - }
> > + /* We do not support MLO_PAUSE_RX yet */
> > + if (state->pause & MLO_PAUSE_TX)
> > + ctrl |= MACB_BIT(PAE);
> >
> > - if (phydev->link != bp->link) {
> > - if (!phydev->link) {
> > - bp->speed = 0;
> > - bp->duplex = -1;
> > - }
> > - bp->link = phydev->link;
> > + if (state->interface == PHY_INTERFACE_MODE_SGMII)
> > + ctrl |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL);
Hmm, so you support SGMII but have no way to read the results of SGMII
negotiation?
> > +
> > + /* Apply the new configuration, if any */
> > + if (old_ctrl ^ ctrl) {
> > + macb_or_gem_writel(bp, NCFGR, ctrl);
> >
> > - status_change = 1;
> > + if (state->link)
> > + macb_set_tx_clk(bp->tx_clk, state->speed, ndev);
Please see include/linux/phylink.h for documentation on the mac_config()
method. It exhaustively describes which members of the state are valid
for each value of "mode", and describes which are not valid to be used.
"state->link" is one such case of an invalid use.
> > }
> >
> > spin_unlock_irqrestore(&bp->lock, flags);
> > +}
> >
> > - if (status_change) {
> > - if (phydev->link) {
> > - /* Update the TX clock rate if and only if the link is
> > - * up and there has been a link change.
> > - */
> > - macb_set_tx_clk(bp->tx_clk, phydev->speed, dev);
> > +static void macb_mac_link_down(struct phylink_config *config, unsigned int
> > mode,
> > + phy_interface_t interface)
> > +{
> > + struct net_device *ndev = to_net_dev(config->dev);
> > + struct macb *bp = netdev_priv(ndev);
> > + struct macb_queue *queue;
> > + unsigned int q;
> > + u32 ctrl;
> >
> > - netif_carrier_on(dev);
> > - netdev_info(dev, "link up (%d/%s)\n",
> > - phydev->speed,
> > - phydev->duplex == DUPLEX_FULL ?
> > - "Full" : "Half");
> > - } else {
> > - netif_carrier_off(dev);
> > - netdev_info(dev, "link down\n");
> > + for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
> > + queue_writel(queue, IDR,
> > + bp->rx_intr_mask | MACB_TX_INT_FLAGS |
> > MACB_BIT(HRESP));
> > +
> > + /* Disable Rx and Tx */
> > + ctrl = macb_readl(bp, NCR) & ~(MACB_BIT(RE) | MACB_BIT(TE));
> > + macb_writel(bp, NCR, ctrl);
> > +
> > + netif_tx_stop_all_queues(ndev);
> > +}
> > +
> > +static void macb_mac_link_up(struct phylink_config *config, unsigned int
> > mode,
> > + phy_interface_t interface, struct phy_device *phy)
> > +{
> > + struct net_device *ndev = to_net_dev(config->dev);
> > + struct macb *bp = netdev_priv(ndev);
> > + struct macb_queue *queue;
> > + unsigned int q;
> > +
> > + /* Initialize rings & buffers as clearing MACB_BIT(TE) in link down
> > + * cleared the pipeline and control registers.
> > + */
> > + bp->macbgem_ops.mog_init_rings(bp);
> > + macb_init_buffers(bp);
> > +
> > + for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
> > + queue_writel(queue, IER,
> > + bp->rx_intr_mask | MACB_TX_INT_FLAGS |
> > MACB_BIT(HRESP));
> > +
> > + /* Enable Rx and Tx */
> > + macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(RE) | MACB_BIT(TE));
> > +
> > + netif_tx_wake_all_queues(ndev);
> > +}
> > +
> > +static const struct phylink_mac_ops macb_phylink_ops = {
> > + .validate = macb_validate,
> > + .mac_link_state = macb_mac_link_state,
> > + .mac_an_restart = macb_mac_an_restart,
> > + .mac_config = macb_mac_config,
> > + .mac_link_down = macb_mac_link_down,
> > + .mac_link_up = macb_mac_link_up,
> > +};
> > +
> > +static int macb_phylink_connect(struct macb *bp)
> > +{
> > + struct net_device *dev = bp->dev;
> > + struct phy_device *phydev;
> > + int ret;
> > +
> > + if (bp->phy_node) {
> > + ret = phylink_of_phy_connect(bp->phylink, bp->phy_node, 0);
This looks quite odd.
phylink expects the second argument to always be the container device
node of the "phy-handle", "phy" or "phy-device" property, never the
node of the PHY itself. Looking at how the driver sets up
bp->phy_node, it is the PHY's node itself sometimes, and in that case
will almost certainly fail.
> > + if (ret) {
> > + netdev_err(dev, "Could not attach PHY (%d)\n", ret);
> > + return ret;
> > + }
> > + } else {
> > + phydev = phy_find_first(bp->mii_bus);
> > + if (!phydev) {
> > + netdev_err(dev, "no PHY found\n");
> > + return -ENXIO;
> > + }
> > +
> > + /* attach the mac to the phy */
> > + ret = phylink_connect_phy(bp->phylink, phydev);
> > + if (ret) {
> > + netdev_err(dev, "Could not attach to PHY (%d)\n", ret);
> > + return ret;
> > }
I'm not entirely sure what this is trying to achieve.
> > }
> > +
> > + phylink_start(bp->phylink);
You're ready to handle a link-up event at this point in the driver?
I guess it's no worse than what the driver was doing with phylib.
> > +
> > + return 0;
> > }
> >
> > /* based on au1000_eth. c*/
> > @@ -534,42 +679,17 @@ static int macb_mii_probe(struct net_device *dev)
> > }
> > }
> >
> > - if (bp->phy_node) {
> > - phydev = of_phy_connect(dev, bp->phy_node,
> > - &macb_handle_link_change, 0,
> > - bp->phy_interface);
> > - if (!phydev)
> > - return -ENODEV;
> > - } else {
> > - phydev = phy_find_first(bp->mii_bus);
> > - if (!phydev) {
> > - netdev_err(dev, "no PHY found\n");
> > - return -ENXIO;
> > - }
> > + bp->phylink_config.dev = &dev->dev;
> > + bp->phylink_config.type = PHYLINK_NETDEV;
> >
> > - /* attach the mac to the phy */
> > - ret = phy_connect_direct(dev, phydev, &macb_handle_link_change,
> > - bp->phy_interface);
> > - if (ret) {
> > - netdev_err(dev, "Could not attach to PHY\n");
> > - return ret;
> > - }
> > + bp->phylink = phylink_create(&bp->phylink_config, dev->dev.fwnode,
> > + bp->phy_interface, &macb_phylink_ops);
> > + if (IS_ERR(bp->phylink)) {
> > + netdev_err(dev, "Could not create a phylink instance (%ld)\n",
> > + PTR_ERR(bp->phylink));
> > + return PTR_ERR(bp->phylink);
> > }
This looks fine.
> >
> > - /* mask with MAC supported features */
> > - if (macb_is_gem(bp) && bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE)
> > - phy_set_max_speed(phydev, SPEED_1000);
> > - else
> > - phy_set_max_speed(phydev, SPEED_100);
> > -
> > - if (bp->caps & MACB_CAPS_NO_GIGABIT_HALF)
> > - phy_remove_link_mode(phydev,
> > - ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
> > -
> > - bp->link = 0;
> > - bp->speed = 0;
> > - bp->duplex = -1;
> > -
> > return 0;
> > }
> >
> > @@ -598,20 +718,10 @@ static int macb_mii_init(struct macb *bp)
> > dev_set_drvdata(&bp->dev->dev, bp->mii_bus);
> >
> > np = bp->pdev->dev.of_node;
> > - if (np && of_phy_is_fixed_link(np)) {
> > - if (of_phy_register_fixed_link(np) < 0) {
> > - dev_err(&bp->pdev->dev,
> > - "broken fixed-link specification %pOF\n", np);
> > - goto err_out_free_mdiobus;
> > - }
> > -
> > - err = mdiobus_register(bp->mii_bus);
> > - } else {
> > - err = of_mdiobus_register(bp->mii_bus, np);
> > - }
> >
> > + err = of_mdiobus_register(bp->mii_bus, np);
> > if (err)
> > - goto err_out_free_fixed_link;
> > + goto err_out_free_mdiobus;
> >
> > err = macb_mii_probe(bp->dev);
> > if (err)
> > @@ -621,11 +731,7 @@ static int macb_mii_init(struct macb *bp)
> >
> > err_out_unregister_bus:
> > mdiobus_unregister(bp->mii_bus);
> > -err_out_free_fixed_link:
> > - if (np && of_phy_is_fixed_link(np))
> > - of_phy_deregister_fixed_link(np);
> > err_out_free_mdiobus:
> > - of_node_put(bp->phy_node);
> > mdiobus_free(bp->mii_bus);
> > err_out:
> > return err;
> > @@ -1314,26 +1420,14 @@ static void macb_hresp_error_task(unsigned long
> > data)
> > bp->macbgem_ops.mog_init_rings(bp);
> >
> > /* Initialize TX and RX buffers */
> > - for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
> > - queue_writel(queue, RBQP, lower_32_bits(queue->rx_ring_dma));
> > -#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
> > - if (bp->hw_dma_cap & HW_DMA_CAP_64B)
> > - queue_writel(queue, RBQPH,
> > - upper_32_bits(queue->rx_ring_dma));
> > -#endif
> > - queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
> > -#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
> > - if (bp->hw_dma_cap & HW_DMA_CAP_64B)
> > - queue_writel(queue, TBQPH,
> > - upper_32_bits(queue->tx_ring_dma));
> > -#endif
> > + macb_init_buffers(bp);
> >
> > - /* Enable interrupts */
> > + /* Enable interrupts */
> > + for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
> > queue_writel(queue, IER,
> > bp->rx_intr_mask |
> > MACB_TX_INT_FLAGS |
> > MACB_BIT(HRESP));
> > - }
> >
> > ctrl |= MACB_BIT(RE) | MACB_BIT(TE);
> > macb_writel(bp, NCR, ctrl);
> > @@ -2221,19 +2315,13 @@ static void macb_configure_dma(struct macb *bp)
> >
> > static void macb_init_hw(struct macb *bp)
> > {
> > - struct macb_queue *queue;
> > - unsigned int q;
> > -
> > u32 config;
> >
> > macb_reset_hw(bp);
> > macb_set_hwaddr(bp);
> >
> > config = macb_mdc_clk_div(bp);
> > - if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII)
> > - config |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL);
> > config |= MACB_BF(RBOF, NET_IP_ALIGN); /* Make eth data aligned */
> > - config |= MACB_BIT(PAE); /* PAuse Enable */
> > config |= MACB_BIT(DRFCS); /* Discard Rx FCS */
> > if (bp->caps & MACB_CAPS_JUMBO)
> > config |= MACB_BIT(JFRAME); /* Enable jumbo frames */
> > @@ -2249,36 +2337,11 @@ static void macb_init_hw(struct macb *bp)
> > macb_writel(bp, NCFGR, config);
> > if ((bp->caps & MACB_CAPS_JUMBO) && bp->jumbo_max_len)
> > gem_writel(bp, JML, bp->jumbo_max_len);
> > - bp->speed = SPEED_10;
> > - bp->duplex = DUPLEX_HALF;
> > bp->rx_frm_len_mask = MACB_RX_FRMLEN_MASK;
> > if (bp->caps & MACB_CAPS_JUMBO)
> > bp->rx_frm_len_mask = MACB_RX_JFRMLEN_MASK;
> >
> > macb_configure_dma(bp);
> > -
> > - /* Initialize TX and RX buffers */
> > - for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
> > - queue_writel(queue, RBQP, lower_32_bits(queue->rx_ring_dma));
> > -#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
> > - if (bp->hw_dma_cap & HW_DMA_CAP_64B)
> > - queue_writel(queue, RBQPH,
> > upper_32_bits(queue->rx_ring_dma));
> > -#endif
> > - queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
> > -#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
> > - if (bp->hw_dma_cap & HW_DMA_CAP_64B)
> > - queue_writel(queue, TBQPH,
> > upper_32_bits(queue->tx_ring_dma));
> > -#endif
> > -
> > - /* Enable interrupts */
> > - queue_writel(queue, IER,
> > - bp->rx_intr_mask |
> > - MACB_TX_INT_FLAGS |
> > - MACB_BIT(HRESP));
> > - }
> > -
> > - /* Enable TX and RX */
> > - macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(RE) | MACB_BIT(TE));
> > }
> >
> > /* The hash address register is 64 bits long and takes up two
> > @@ -2402,8 +2465,8 @@ static void macb_set_rx_mode(struct net_device *dev)
> >
> > static int macb_open(struct net_device *dev)
> > {
> > - struct macb *bp = netdev_priv(dev);
> > size_t bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + NET_IP_ALIGN;
> > + struct macb *bp = netdev_priv(dev);
> > struct macb_queue *queue;
> > unsigned int q;
> > int err;
> > @@ -2417,12 +2480,6 @@ static int macb_open(struct net_device *dev)
> > /* carrier starts down */
> > netif_carrier_off(dev);
Note, that's included in phylink_start().
> >
> > - /* if the phy is not yet register, retry later*/
> > - if (!dev->phydev) {
> > - err = -EAGAIN;
> > - goto pm_exit;
> > - }
> > -
> > /* RX buffers initialization */
> > macb_init_rx_buffer_size(bp, bufsz);
> >
> > @@ -2436,11 +2493,11 @@ static int macb_open(struct net_device *dev)
> > for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
> > napi_enable(&queue->napi);
> >
> > - bp->macbgem_ops.mog_init_rings(bp);
> > macb_init_hw(bp);
> >
> > - /* schedule a link state check */
> > - phy_start(dev->phydev);
> > + err = macb_phylink_connect(bp);
> > + if (err)
> > + goto pm_exit;
> >
> > netif_tx_start_all_queues(dev);
> >
> > @@ -2467,8 +2524,8 @@ static int macb_close(struct net_device *dev)
> > for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
> > napi_disable(&queue->napi);
> >
> > - if (dev->phydev)
> > - phy_stop(dev->phydev);
> > + phylink_stop(bp->phylink);
> > + phylink_disconnect_phy(bp->phylink);
This is fine if _this_ driver was the one to attach the PHY, otherwise
it will disconnect someone else's PHY (eg, the copper SFP PHY if this
driver supports SFPs.)
> >
> > spin_lock_irqsave(&bp->lock, flags);
> > macb_reset_hw(bp);
> > @@ -2703,8 +2760,9 @@ static void macb_get_wol(struct net_device *netdev,
> > struct ethtool_wolinfo *wol)
> > wol->wolopts = 0;
> >
> > if (bp->wol & MACB_WOL_HAS_MAGIC_PACKET) {
> > - wol->supported = WAKE_MAGIC;
> > + phylink_ethtool_get_wol(bp->phylink, wol);
> >
> > + wol->supported |= WAKE_MAGIC;
> > if (bp->wol & MACB_WOL_ENABLED)
> > wol->wolopts |= WAKE_MAGIC;
I'm not sure that the logic here is actually correct. What would be
the result if the PHY has WOL disabled but bp->wol has both these
enabled?
> > }
> > @@ -2713,6 +2771,11 @@ static void macb_get_wol(struct net_device *netdev,
> > struct ethtool_wolinfo *wol)
> > static int macb_set_wol(struct net_device *netdev, struct ethtool_wolinfo
> > *wol)
> > {
> > struct macb *bp = netdev_priv(netdev);
> > + int ret;
> > +
> > + ret = phylink_ethtool_set_wol(bp->phylink, wol);
> > + if (!ret)
> > + return 0;
> >
> > if (!(bp->wol & MACB_WOL_HAS_MAGIC_PACKET) ||
> > (wol->wolopts & ~WAKE_MAGIC))
> > @@ -2728,6 +2791,22 @@ static int macb_set_wol(struct net_device *netdev,
> > struct ethtool_wolinfo *wol)
> > return 0;
> > }
> >
> > +static int macb_get_link_ksettings(struct net_device *netdev,
> > + struct ethtool_link_ksettings *kset)
> > +{
> > + struct macb *bp = netdev_priv(netdev);
> > +
> > + return phylink_ethtool_ksettings_get(bp->phylink, kset);
> > +}
> > +
> > +static int macb_set_link_ksettings(struct net_device *netdev,
> > + const struct ethtool_link_ksettings *kset)
> > +{
> > + struct macb *bp = netdev_priv(netdev);
> > +
> > + return phylink_ethtool_ksettings_set(bp->phylink, kset);
> > +}
> > +
> > static void macb_get_ringparam(struct net_device *netdev,
> > struct ethtool_ringparam *ring)
> > {
> > @@ -3164,8 +3243,8 @@ static const struct ethtool_ops macb_ethtool_ops = {
> > .get_ts_info = ethtool_op_get_ts_info,
> > .get_wol = macb_get_wol,
> > .set_wol = macb_set_wol,
> > - .get_link_ksettings = phy_ethtool_get_link_ksettings,
> > - .set_link_ksettings = phy_ethtool_set_link_ksettings,
> > + .get_link_ksettings = macb_get_link_ksettings,
> > + .set_link_ksettings = macb_set_link_ksettings,
> > .get_ringparam = macb_get_ringparam,
> > .set_ringparam = macb_set_ringparam,
> > };
> > @@ -3178,8 +3257,8 @@ static const struct ethtool_ops gem_ethtool_ops = {
> > .get_ethtool_stats = gem_get_ethtool_stats,
> > .get_strings = gem_get_ethtool_strings,
> > .get_sset_count = gem_get_sset_count,
> > - .get_link_ksettings = phy_ethtool_get_link_ksettings,
> > - .set_link_ksettings = phy_ethtool_set_link_ksettings,
> > + .get_link_ksettings = macb_get_link_ksettings,
> > + .set_link_ksettings = macb_set_link_ksettings,
> > .get_ringparam = macb_get_ringparam,
> > .set_ringparam = macb_set_ringparam,
> > .get_rxnfc = gem_get_rxnfc,
> > @@ -3188,17 +3267,13 @@ static const struct ethtool_ops gem_ethtool_ops = {
> >
> > static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
> > {
> > - struct phy_device *phydev = dev->phydev;
> > struct macb *bp = netdev_priv(dev);
> >
> > if (!netif_running(dev))
> > return -EINVAL;
> >
> > - if (!phydev)
> > - return -ENODEV;
> > -
> > if (!bp->ptp_info)
> > - return phy_mii_ioctl(phydev, rq, cmd);
> > + return phylink_mii_ioctl(bp->phylink, rq, cmd);
> >
> > switch (cmd) {
> > case SIOCSHWTSTAMP:
> > @@ -3206,7 +3281,7 @@ static int macb_ioctl(struct net_device *dev, struct
> > ifreq *rq, int cmd)
> > case SIOCGHWTSTAMP:
> > return bp->ptp_info->get_hwtst(dev, rq);
> > default:
> > - return phy_mii_ioctl(phydev, rq, cmd);
> > + return phylink_mii_ioctl(bp->phylink, rq, cmd);
> > }
This can probably be cleaned up - move
return phylink_mii_ioctl(bp->phylink, rq, cmd);
to the bottom, and just make the switch() conditional on bp->ptp_info
being non-NULL.
> > }
> >
> > @@ -3330,7 +3405,8 @@ static void macb_configure_caps(struct macb *bp,
> > #ifdef CONFIG_MACB_USE_HWSTAMP
> > if (gem_has_ptp(bp)) {
> > if (!GEM_BFEXT(TSU, gem_readl(bp, DCFG5)))
> > - pr_err("GEM doesn't support hardware ptp.\n");
> > + dev_err(&bp->pdev->dev,
> > + "GEM doesn't support hardware ptp.\n");
> > else {
> > bp->hw_dma_cap |= HW_DMA_CAP_PTP;
> > bp->ptp_info = &gem_ptp_info;
> > @@ -3707,8 +3783,9 @@ static int at91ether_open(struct net_device *dev)
> > MACB_BIT(ISR_ROVR) |
> > MACB_BIT(HRESP));
> >
> > - /* schedule a link state check */
> > - phy_start(dev->phydev);
> > + ret = macb_phylink_connect(lp);
> > + if (ret)
> > + return ret;
> >
> > netif_start_queue(dev);
> >
> > @@ -3737,6 +3814,9 @@ static int at91ether_close(struct net_device *dev)
> >
> > netif_stop_queue(dev);
> >
> > + phylink_stop(lp->phylink);
> > + phylink_disconnect_phy(lp->phylink);
Same comment as other instance.
> > +
> > dma_free_coherent(&lp->pdev->dev,
> > AT91ETHER_MAX_RX_DESCR *
> > macb_dma_desc_get_size(lp),
> > @@ -4181,7 +4261,6 @@ static int macb_probe(struct platform_device *pdev)
> > struct clk *tsu_clk = NULL;
> > unsigned int queue_mask, num_queues;
> > bool native_io;
> > - struct phy_device *phydev;
> > struct net_device *dev;
> > struct resource *regs;
> > void __iomem *mem;
> > @@ -4324,8 +4403,6 @@ static int macb_probe(struct platform_device *pdev)
> > if (err)
> > goto err_out_free_netdev;
> >
> > - phydev = dev->phydev;
> > -
> > netif_carrier_off(dev);
> >
> > err = register_netdev(dev);
> > @@ -4337,8 +4414,6 @@ static int macb_probe(struct platform_device *pdev)
> > tasklet_init(&bp->hresp_err_tasklet, macb_hresp_error_task,
> > (unsigned long)bp);
> >
> > - phy_attached_info(phydev);
> > -
> > netdev_info(dev, "Cadence %s rev 0x%08x at 0x%08lx irq %d (%pM)\n",
> > macb_is_gem(bp) ? "GEM" : "MACB", macb_readl(bp, MID),
> > dev->base_addr, dev->irq, dev->dev_addr);
> > @@ -4349,11 +4424,7 @@ static int macb_probe(struct platform_device *pdev)
> > return 0;
> >
> > err_out_unregister_mdio:
> > - phy_disconnect(dev->phydev);
> > mdiobus_unregister(bp->mii_bus);
> > - of_node_put(bp->phy_node);
> > - if (np && of_phy_is_fixed_link(np))
> > - of_phy_deregister_fixed_link(np);
> > mdiobus_free(bp->mii_bus);
> >
> > err_out_free_netdev:
> > @@ -4377,18 +4448,12 @@ static int macb_remove(struct platform_device *pdev)
> > {
> > struct net_device *dev;
> > struct macb *bp;
> > - struct device_node *np = pdev->dev.of_node;
> >
> > dev = platform_get_drvdata(pdev);
> >
> > if (dev) {
> > bp = netdev_priv(dev);
> > - if (dev->phydev)
> > - phy_disconnect(dev->phydev);
> > mdiobus_unregister(bp->mii_bus);
> > - if (np && of_phy_is_fixed_link(np))
> > - of_phy_deregister_fixed_link(np);
> > - dev->phydev = NULL;
> > mdiobus_free(bp->mii_bus);
> >
> > unregister_netdev(dev);
> > @@ -4403,7 +4468,6 @@ static int macb_remove(struct platform_device *pdev)
> > clk_disable_unprepare(bp->tsu_clk);
> > pm_runtime_set_suspended(&pdev->dev);
> > }
> > - of_node_put(bp->phy_node);
> > free_netdev(dev);
> > }
Doesn't this need to cleanup phylink somewhere via a call to
phylink_destroy() ?
> >
> > @@ -4421,7 +4485,6 @@ static int __maybe_unused macb_suspend(struct device
> > *dev)
> > if (!netif_running(netdev))
> > return 0;
> >
> > -
> > if (bp->wol & MACB_WOL_ENABLED) {
> > macb_writel(bp, IER, MACB_BIT(WOL));
> > macb_writel(bp, WOL, MACB_BIT(MAG));
> > @@ -4432,8 +4495,6 @@ static int __maybe_unused macb_suspend(struct device
> > *dev)
> > for (q = 0, queue = bp->queues; q < bp->num_queues;
> > ++q, ++queue)
> > napi_disable(&queue->napi);
> > - phy_stop(netdev->phydev);
> > - phy_suspend(netdev->phydev);
So you don't need to shutdown the phylib state machine after all?
> > spin_lock_irqsave(&bp->lock, flags);
> > macb_reset_hw(bp);
> > spin_unlock_irqrestore(&bp->lock, flags);
> > @@ -4481,12 +4542,8 @@ static int __maybe_unused macb_resume(struct device
> > *dev)
> > for (q = 0, queue = bp->queues; q < bp->num_queues;
> > ++q, ++queue)
> > napi_enable(&queue->napi);
> > - phy_resume(netdev->phydev);
> > - phy_init_hw(netdev->phydev);
> > - phy_start(netdev->phydev);
This looks like it was re-setting up the PHY, but nothing happens here
after conversion? Do we need to add something to phylink for this?
Has this been tested?
> > }
> >
> > - bp->macbgem_ops.mog_init_rings(bp);
> > macb_init_hw(bp);
> > macb_set_rx_mode(netdev);
> > macb_restore_features(bp);
> > --
> > 2.21.0
> >
>
--
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