linux-stable.git/drivers/net/phy/phy-core.c, branch v5.7 Linux kernel stable tree net: phy: add and use phy_check_downshift 2020-03-24T04:09:47+00:00 Heiner Kallweit hkallweit1@gmail.com 2020-03-20T16:51:38+00:00 5eee3bb7103f4a66e4b90c2817f5e72509a2a607 So far PHY drivers have to check whether a downshift occurred to be able to notify the user. To make life of drivers authors a little bit easier move the downshift notification to phylib. phy_check_downshift() compares the highest mutually advertised speed with the actual value of phydev->speed (typically read by the PHY driver from a vendor-specific register) to detect a downshift. v2: - Add downshift hint to phy_print_status Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
So far PHY drivers have to check whether a downshift occurred to be
able to notify the user. To make life of drivers authors a little bit
easier move the downshift notification to phylib. phy_check_downshift()
compares the highest mutually advertised speed with the actual value
of phydev->speed (typically read by the PHY driver from a
vendor-specific register) to detect a downshift.

v2:
- Add downshift hint to phy_print_status

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: mdiobus: add APIs for modifying a MDIO device register 2020-03-18T05:51:16+00:00 Russell King rmk+kernel@armlinux.org.uk 2020-03-17T14:52:31+00:00 6cc7cf8125b3d086cd80c96e02edb6f4ab9b20fa Add APIs for modifying a MDIO device register, similar to the existing phy_modify() group of functions, but at mdiobus level instead. Adapt __phy_modify_changed() to use the new mdiobus level helper. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net> 
Add APIs for modifying a MDIO device register, similar to the existing
phy_modify() group of functions, but at mdiobus level instead.  Adapt
__phy_modify_changed() to use the new mdiobus level helper.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
ethtool: Add support for low latency RS FEC 2020-02-19T03:17:31+00:00 Aya Levin ayal@mellanox.com 2020-02-11T22:32:52+00:00 f623e5970501449b475a8dc007f0fe24743ab9d3 Add support for low latency Reed Solomon FEC as LLRS. The LL-FEC is defined by the 25G/50G ethernet consortium, in the document titled "Low Latency Reed Solomon Forward Error Correction" Signed-off-by: Aya Levin <ayal@mellanox.com> Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com> CC: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> 
Add support for low latency Reed Solomon FEC as LLRS.

The LL-FEC is defined by the 25G/50G ethernet consortium,
in the document titled "Low Latency Reed Solomon Forward Error Correction"

Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
CC: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
net: phy: don't crash in phy_read/_write_mmd without a PHY driver 2020-01-20T09:08:20+00:00 Alex Marginean alexandru.marginean@nxp.com 2020-01-16T17:46:28+00:00 3e41d04e2b7373490977d7145fb12109f23cde9c The APIs can be used by Ethernet drivers without actually loading a PHY driver. This may become more widespread in the future with 802.3z compatible MAC PCS devices being locally driven by the MAC driver when configuring for a PHY mode with in-band negotiation. Check that drv is not NULL before reading from it. Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
The APIs can be used by Ethernet drivers without actually loading a PHY
driver. This may become more widespread in the future with 802.3z
compatible MAC PCS devices being locally driven by the MAC driver when
configuring for a PHY mode with in-band negotiation.

Check that drv is not NULL before reading from it.

Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: phy: add helpers phy_(un)lock_mdio_bus 2019-11-25T18:47:00+00:00 Heiner Kallweit hkallweit1@gmail.com 2019-11-23T16:28:37+00:00 bec170e55982c2d3b8e1beccadf16e288fe6fb5a Add helpers to make locking/unlocking the MDIO bus easier. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Add helpers to make locking/unlocking the MDIO bus easier.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: phy: avoid NPE if read_page/write_page callbacks are not available 2019-10-18T16:57:55+00:00 Heiner Kallweit hkallweit1@gmail.com 2019-10-16T19:53:31+00:00 f86854a2e76256ee82025f981a5385480eec17b7 Currently there's a bug in the module subsystem [0] preventing load of the PHY driver module on certain systems (as one symptom). This results in a NPE on such systems for the following reason: Instead of the correct PHY driver the genphy driver is loaded that doesn't implement the read_page/write_page callbacks. Every call to phy_read_paged() et al will result in a NPE therefore. In parallel to fixing the root cause we should make sure that this one and maybe similar issues in other subsystems don't result in a NPE in phylib. So let's check for the callbacks before using them and warn once if they are not available. [0] https://marc.info/?t=157072642100001&r=1&w=2 Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Currently there's a bug in the module subsystem [0] preventing load of
the PHY driver module on certain systems (as one symptom).
This results in a NPE on such systems for the following reason:
Instead of the correct PHY driver the genphy driver is loaded that
doesn't implement the read_page/write_page callbacks. Every call to
phy_read_paged() et al will result in a NPE therefore.

In parallel to fixing the root cause we should make sure that this one
and maybe similar issues in other subsystems don't result in a NPE
in phylib. So let's check for the callbacks before using them and warn
once if they are not available.

[0] https://marc.info/?t=157072642100001&r=1&w=2

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ethtool: Add support for 400Gbps (50Gbps per lane) link modes 2019-10-15T22:02:30+00:00 Jiri Pirko jiri@mellanox.com 2019-10-12T16:27:57+00:00 14af7fd1d4279c8db7fbbb3ca0df3b13179eb502 Add support for 400Gbps speed, link modes of 50Gbps per lane Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Add support for 400Gbps speed, link modes of 50Gbps per lane

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: phy: extract pause mode 2019-10-05T01:11:08+00:00 Russell King rmk+kernel@armlinux.org.uk 2019-10-04T16:06:09+00:00 2d880b8709c013d47472f85a9d42ea1aca3bce47 Extract the update of phylib's software pause mode state from genphy_read_status(), so that we can re-use this functionality with PHYs that have alternative ways to read the negotiation results. Tested-by: tinywrkb <tinywrkb@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net> 
Extract the update of phylib's software pause mode state from
genphy_read_status(), so that we can re-use this functionality with
PHYs that have alternative ways to read the negotiation results.

Tested-by: tinywrkb <tinywrkb@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
net: phy: add phy_speed_down_core and phy_resolve_min_speed 2019-08-14T00:14:06+00:00 Heiner Kallweit hkallweit1@gmail.com 2019-08-12T21:51:27+00:00 331c56ac73846fa267c04ee6aa9a00bb5fed9440 phy_speed_down_core provides most of the functionality for phy_speed_down. It makes use of new helper phy_resolve_min_speed that is based on the sorting of the settings[] array. In certain cases it may be helpful to be able to exclude legacy half duplex modes, therefore prepare phy_resolve_min_speed() for it. v2: - rename __phy_speed_down to phy_speed_down_core Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> 
phy_speed_down_core provides most of the functionality for
phy_speed_down. It makes use of new helper phy_resolve_min_speed that is
based on the sorting of the settings[] array. In certain cases it may be
helpful to be able to exclude legacy half duplex modes, therefore
prepare phy_resolve_min_speed() for it.

v2:
- rename __phy_speed_down to phy_speed_down_core

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
net: phy: add __set_linkmode_max_speed 2019-08-14T00:14:06+00:00 Heiner Kallweit hkallweit1@gmail.com 2019-08-12T21:50:30+00:00 7b261e0ef5f88087765df7f079a4bd0d285f7579 We will need the functionality of __set_linkmode_max_speed also for linkmode bitmaps other than phydev->supported. Therefore split it. v2: - remove unused parameter from __set_linkmode_max_speed Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> 
We will need the functionality of __set_linkmode_max_speed also for
linkmode bitmaps other than phydev->supported. Therefore split it.

v2:
- remove unused parameter from __set_linkmode_max_speed

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>