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94 lines
3.1 KiB
Diff
94 lines
3.1 KiB
Diff
From c04ade27cb7b952b6b9b9a0efa0a6129cc63f2ae Mon Sep 17 00:00:00 2001
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From: Maxime Chevallier <maxime.chevallier@bootlin.com>
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Date: Wed, 17 Aug 2022 14:32:54 +0200
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Subject: [PATCH] net: phy: Add helper to derive the number of ports from a phy
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mode
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Some phy modes such as QSGMII multiplex several MAC<->PHY links on one
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single physical interface. QSGMII used to be the only one supported, but
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other modes such as QUSGMII also carry multiple links.
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This helper allows getting the number of links that are multiplexed
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on a given interface.
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Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
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Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/phy/phy-core.c | 52 ++++++++++++++++++++++++++++++++++++++
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include/linux/phy.h | 2 ++
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2 files changed, 54 insertions(+)
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--- a/drivers/net/phy/phy-core.c
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+++ b/drivers/net/phy/phy-core.c
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@@ -74,6 +74,58 @@ const char *phy_duplex_to_str(unsigned i
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}
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EXPORT_SYMBOL_GPL(phy_duplex_to_str);
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+/**
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+ * phy_interface_num_ports - Return the number of links that can be carried by
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+ * a given MAC-PHY physical link. Returns 0 if this is
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+ * unknown, the number of links else.
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+ *
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+ * @interface: The interface mode we want to get the number of ports
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+ */
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+int phy_interface_num_ports(phy_interface_t interface)
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+{
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+ switch (interface) {
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+ case PHY_INTERFACE_MODE_NA:
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+ return 0;
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+ case PHY_INTERFACE_MODE_INTERNAL:
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+ case PHY_INTERFACE_MODE_MII:
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+ case PHY_INTERFACE_MODE_GMII:
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+ case PHY_INTERFACE_MODE_TBI:
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+ case PHY_INTERFACE_MODE_REVMII:
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+ case PHY_INTERFACE_MODE_RMII:
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+ case PHY_INTERFACE_MODE_REVRMII:
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+ case PHY_INTERFACE_MODE_RGMII:
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+ case PHY_INTERFACE_MODE_RGMII_ID:
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+ case PHY_INTERFACE_MODE_RGMII_RXID:
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+ case PHY_INTERFACE_MODE_RGMII_TXID:
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+ case PHY_INTERFACE_MODE_RTBI:
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+ case PHY_INTERFACE_MODE_XGMII:
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+ case PHY_INTERFACE_MODE_XLGMII:
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+ case PHY_INTERFACE_MODE_MOCA:
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+ case PHY_INTERFACE_MODE_TRGMII:
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+ case PHY_INTERFACE_MODE_USXGMII:
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+ case PHY_INTERFACE_MODE_SGMII:
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+ case PHY_INTERFACE_MODE_SMII:
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+ case PHY_INTERFACE_MODE_1000BASEX:
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+ case PHY_INTERFACE_MODE_2500BASEX:
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+ case PHY_INTERFACE_MODE_5GBASER:
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+ case PHY_INTERFACE_MODE_10GBASER:
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+ case PHY_INTERFACE_MODE_25GBASER:
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+ case PHY_INTERFACE_MODE_10GKR:
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+ case PHY_INTERFACE_MODE_100BASEX:
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+ case PHY_INTERFACE_MODE_RXAUI:
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+ case PHY_INTERFACE_MODE_XAUI:
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+ return 1;
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+ case PHY_INTERFACE_MODE_QSGMII:
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+ case PHY_INTERFACE_MODE_QUSGMII:
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+ return 4;
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+ case PHY_INTERFACE_MODE_MAX:
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+ WARN_ONCE(1, "PHY_INTERFACE_MODE_MAX isn't a valid interface mode");
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+ return 0;
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+ }
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(phy_interface_num_ports);
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+
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/* A mapping of all SUPPORTED settings to speed/duplex. This table
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* must be grouped by speed and sorted in descending match priority
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* - iow, descending speed.
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--- a/include/linux/phy.h
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+++ b/include/linux/phy.h
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@@ -964,6 +964,8 @@ struct phy_fixup {
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const char *phy_speed_to_str(int speed);
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const char *phy_duplex_to_str(unsigned int duplex);
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+int phy_interface_num_ports(phy_interface_t interface);
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+
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/* A structure for mapping a particular speed and duplex
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* combination to a particular SUPPORTED and ADVERTISED value
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*/
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