target/linux/generic/backport-5.15/731-v6.1-0002-net-phy-Add-helper-to-derive-the-number-of-ports-fro.patch

   1 From c04ade27cb7b952b6b9b9a0efa0a6129cc63f2ae Mon Sep 17 00:00:00 2001
   2 From: Maxime Chevallier <maxime.chevallier@bootlin.com>
   3 Date: Wed, 17 Aug 2022 14:32:54 +0200
   4 Subject: [PATCH] net: phy: Add helper to derive the number of ports from a phy
   5  mode
   6
   7 Some phy modes such as QSGMII multiplex several MAC<->PHY links on one
   8 single physical interface. QSGMII used to be the only one supported, but
   9 other modes such as QUSGMII also carry multiple links.
  10
  11 This helper allows getting the number of links that are multiplexed
  12 on a given interface.
  13
  14 Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
  15 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
  16 Signed-off-by: David S. Miller <davem@davemloft.net>
  17 ---
  18  drivers/net/phy/phy-core.c | 52 ++++++++++++++++++++++++++++++++++++++
  19  include/linux/phy.h        |  2 ++
  20  2 files changed, 54 insertions(+)
  21
  22 --- a/drivers/net/phy/phy-core.c
  23 +++ b/drivers/net/phy/phy-core.c
  24 @@ -74,6 +74,58 @@ const char *phy_duplex_to_str(unsigned i
  25  }
  26  EXPORT_SYMBOL_GPL(phy_duplex_to_str);
  27
  28 +/**
  29 + * phy_interface_num_ports - Return the number of links that can be carried by
  30 + *                          a given MAC-PHY physical link. Returns 0 if this is
  31 + *                          unknown, the number of links else.
  32 + *
  33 + * @interface: The interface mode we want to get the number of ports
  34 + */
  35 +int phy_interface_num_ports(phy_interface_t interface)
  36 +{
  37 +       switch (interface) {
  38 +       case PHY_INTERFACE_MODE_NA:
  39 +               return 0;
  40 +       case PHY_INTERFACE_MODE_INTERNAL:
  41 +       case PHY_INTERFACE_MODE_MII:
  42 +       case PHY_INTERFACE_MODE_GMII:
  43 +       case PHY_INTERFACE_MODE_TBI:
  44 +       case PHY_INTERFACE_MODE_REVMII:
  45 +       case PHY_INTERFACE_MODE_RMII:
  46 +       case PHY_INTERFACE_MODE_REVRMII:
  47 +       case PHY_INTERFACE_MODE_RGMII:
  48 +       case PHY_INTERFACE_MODE_RGMII_ID:
  49 +       case PHY_INTERFACE_MODE_RGMII_RXID:
  50 +       case PHY_INTERFACE_MODE_RGMII_TXID:
  51 +       case PHY_INTERFACE_MODE_RTBI:
  52 +       case PHY_INTERFACE_MODE_XGMII:
  53 +       case PHY_INTERFACE_MODE_XLGMII:
  54 +       case PHY_INTERFACE_MODE_MOCA:
  55 +       case PHY_INTERFACE_MODE_TRGMII:
  56 +       case PHY_INTERFACE_MODE_USXGMII:
  57 +       case PHY_INTERFACE_MODE_SGMII:
  58 +       case PHY_INTERFACE_MODE_SMII:
  59 +       case PHY_INTERFACE_MODE_1000BASEX:
  60 +       case PHY_INTERFACE_MODE_2500BASEX:
  61 +       case PHY_INTERFACE_MODE_5GBASER:
  62 +       case PHY_INTERFACE_MODE_10GBASER:
  63 +       case PHY_INTERFACE_MODE_25GBASER:
  64 +       case PHY_INTERFACE_MODE_10GKR:
  65 +       case PHY_INTERFACE_MODE_100BASEX:
  66 +       case PHY_INTERFACE_MODE_RXAUI:
  67 +       case PHY_INTERFACE_MODE_XAUI:
  68 +               return 1;
  69 +       case PHY_INTERFACE_MODE_QSGMII:
  70 +       case PHY_INTERFACE_MODE_QUSGMII:
  71 +               return 4;
  72 +       case PHY_INTERFACE_MODE_MAX:
  73 +               WARN_ONCE(1, "PHY_INTERFACE_MODE_MAX isn't a valid interface mode");
  74 +               return 0;
  75 +       }
  76 +       return 0;
  77 +}
  78 +EXPORT_SYMBOL_GPL(phy_interface_num_ports);
  79 +
  80  /* A mapping of all SUPPORTED settings to speed/duplex.  This table
  81   * must be grouped by speed and sorted in descending match priority
  82   * - iow, descending speed.
  83 --- a/include/linux/phy.h
  84 +++ b/include/linux/phy.h
  85 @@ -964,6 +964,8 @@ struct phy_fixup {
  86  const char *phy_speed_to_str(int speed);
  87  const char *phy_duplex_to_str(unsigned int duplex);
  88
  89 +int phy_interface_num_ports(phy_interface_t interface);
  90 +
  91  /* A structure for mapping a particular speed and duplex
  92   * combination to a particular SUPPORTED and ADVERTISED value
  93   */