target/linux/generic/backport-4.19/703-v4.20-net-ethernet-Add-helper-for-set_pauseparam-for-Asym-.patch

   1 From ce825df56e0480a2cbb296e38976babafb57e503 Mon Sep 17 00:00:00 2001
   2 From: Andrew Lunn <andrew@lunn.ch>
   3 Date: Wed, 12 Sep 2018 01:53:17 +0200
   4 Subject: [PATCH 601/660] net: ethernet: Add helper for set_pauseparam for Asym
   5  Pause
   6
   7 ethtool can be used to enable/disable pause. Add a helper to configure
   8 the PHY when asym pause is supported.
   9
  10 Signed-off-by: Andrew Lunn <andrew@lunn.ch>
  11 Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
  12 Signed-off-by: David S. Miller <davem@davemloft.net>
  13 ---
  14  drivers/net/phy/phy_device.c | 30 ++++++++++++++++++++++++++++++
  15  include/linux/phy.h          |  1 +
  16  2 files changed, 31 insertions(+)
  17
  18 --- a/drivers/net/phy/phy_device.c
  19 +++ b/drivers/net/phy/phy_device.c
  20 @@ -1789,6 +1789,36 @@ void phy_support_asym_pause(struct phy_d
  21  }
  22  EXPORT_SYMBOL(phy_support_asym_pause);
  23
  24 +/**
  25 + * phy_set_asym_pause - Configure Pause and Asym Pause
  26 + * @phydev: target phy_device struct
  27 + * @rx: Receiver Pause is supported
  28 + * @tx: Transmit Pause is supported
  29 + *
  30 + * Description: Configure advertised Pause support depending on if
  31 + * transmit and receiver pause is supported. If there has been a
  32 + * change in adverting, trigger a new autoneg. Generally called from
  33 + * the set_pauseparam .ndo.
  34 + */
  35 +void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
  36 +{
  37 +       u16 oldadv = phydev->advertising;
  38 +       u16 newadv = oldadv &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause);
  39 +
  40 +       if (rx)
  41 +               newadv |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
  42 +       if (tx)
  43 +               newadv ^= SUPPORTED_Asym_Pause;
  44 +
  45 +       if (oldadv != newadv) {
  46 +               phydev->advertising = newadv;
  47 +
  48 +               if (phydev->autoneg)
  49 +                       phy_start_aneg(phydev);
  50 +       }
  51 +}
  52 +EXPORT_SYMBOL(phy_set_asym_pause);
  53 +
  54  static void of_set_phy_supported(struct phy_device *phydev)
  55  {
  56         struct device_node *node = phydev->mdio.dev.of_node;
  57 --- a/include/linux/phy.h
  58 +++ b/include/linux/phy.h
  59 @@ -1050,6 +1050,7 @@ int phy_start_interrupts(struct phy_devi
  60  void phy_print_status(struct phy_device *phydev);
  61  int phy_set_max_speed(struct phy_device *phydev, u32 max_speed);
  62  void phy_support_asym_pause(struct phy_device *phydev);
  63 +void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx);
  64
  65  int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
  66                        int (*run)(struct phy_device *));