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  1. 07 6月, 2017 2 次提交
  3. 27 4月, 2017 1 次提交
    • A
      net: phy: fix auto-negotiation stall due to unavailable interrupt · f555f34f
      由 Alexander Kochetkov 提交于 
      The Ethernet link on an interrupt driven PHY was not coming up if the Ethernet
cable was plugged before the Ethernet interface was brought up.

The patch trigger PHY state machine to update link state if PHY was requested to
do auto-negotiation and auto-negotiation complete flag already set.

During power-up cycle the PHY do auto-negotiation, generate interrupt and set
auto-negotiation complete flag. Interrupt is handled by PHY state machine but
doesn't update link state because PHY is in PHY_READY state. After some time
MAC bring up, start and request PHY to do auto-negotiation. If there are no new
settings to advertise genphy_config_aneg() doesn't start PHY auto-negotiation.
PHY continue to stay in auto-negotiation complete state and doesn't fire
interrupt. At the same time PHY state machine expect that PHY started
auto-negotiation and is waiting for interrupt from PHY and it won't get it.

Fixes: 321beec5 ("net: phy: Use interrupts when available in NOLINK state")
Signed-off-by: NAlexander Kochetkov <al.kochet@gmail.com>
Cc: stable <stable@vger.kernel.org> # v4.9+
Tested-by: NRoger Quadros <rogerq@ti.com>
Tested-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f555f34f
  5. 18 4月, 2017 2 次提交
    • R
      net: phy: simplify phy_supported_speeds() · 786df9c2
      由 Russell King 提交于 
      Simplify the loop in phy_supported_speeds().
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      786df9c2
    • R
      net: phy: improve phylib correctness for non-autoneg settings · d0613037
      由 Russell King 提交于 
      phylib has some undesirable behaviour when forcing a link mode through
ethtool.  phylib uses this code:

	idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
			features);

to find an index in the settings table.  phy_find_setting() starts at
index 0, and scans upwards looking for an exact speed and duplex match.
When it doesn't find it, it returns MAX_NUM_SETTINGS - 1, which is
10baseT-Half duplex.

phy_find_valid() then scans from the point (and effectively only checks
one entry) before bailing out, returning MAX_NUM_SETTINGS - 1.

phy_sanitize_settings() then sets ->speed to SPEED_10 and ->duplex to
DUPLEX_HALF whether or not 10baseT-Half is supported or not.  This goes
against all the comments against these functions, and 10baseT-Half may
not even be supported by the hardware.

Rework these functions, introducing a new method of scanning the table.
There are two modes of lookup that phylib wants: exact, and inexact.

- in exact mode, we return either an exact match or failure
- in inexact mode, we return an exact match if it exists, a match at
  the highest speed that is not greater than the requested speed
  (ignoring duplex), or failing that, the lowest supported speed, or
  failure.

The biggest difference is that we always check whether the entry is
supported before further consideration, so all unsupported entries are
not considered as candidates.

This results in arguably saner behaviour, better matches the comments,
and is probably what users would expect.

This becomes important as ethernet speeds increase, PHYs exist which do
not support the 10Mbit speeds, and half-duplex is likely to become
obsolete - it's already not even an option on 10Gbit and faster links.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      d0613037
  7. 05 4月, 2017 1 次提交
  9. 02 4月, 2017 3 次提交
  11. 25 3月, 2017 1 次提交
  13. 23 3月, 2017 2 次提交
  15. 25 2月, 2017 1 次提交
  17. 20 2月, 2017 1 次提交
  19. 26 1月, 2017 1 次提交
  21. 24 1月, 2017 1 次提交
  23. 10 1月, 2017 1 次提交
    • Z
      phy state machine: failsafe leave invalid RUNNING state · 811a9191
      由 Zefir Kurtisi 提交于 
      While in RUNNING state, phy_state_machine() checks for link changes by
comparing phydev->link before and after calling phy_read_status().
This works as long as it is guaranteed that phydev->link is never
changed outside the phy_state_machine().

If in some setups this happens, it causes the state machine to miss
a link loss and remain RUNNING despite phydev->link being 0.

This has been observed running a dsa setup with a process continuously
polling the link states over ethtool each second (SNMPD RFC-1213
agent). Disconnecting the link on a phy followed by a ETHTOOL_GSET
causes dsa_slave_get_settings() / dsa_slave_get_link_ksettings() to
call phy_read_status() and with that modify the link status - and
with that bricking the phy state machine.

This patch adds a fail-safe check while in RUNNING, which causes to
move to CHANGELINK when the link is gone and we are still RUNNING.
Signed-off-by: NZefir Kurtisi <zefir.kurtisi@neratec.com>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      811a9191
  25. 02 12月, 2016 1 次提交
  27. 30 11月, 2016 1 次提交
  29. 16 11月, 2016 1 次提交
  31. 13 11月, 2016 1 次提交
  33. 18 10月, 2016 3 次提交
  35. 17 10月, 2016 3 次提交
  37. 14 10月, 2016 1 次提交
    • A
      net: phy: Trigger state machine on state change and not polling. · 3c293f4e
      由 Andrew Lunn 提交于 
      The phy_start() is used to indicate the PHY is now ready to do its
work. The state is changed, normally to PHY_UP which means that both
the MAC and the PHY are ready.

If the phy driver is using polling, when the next poll happens, the
state machine notices the PHY is now in PHY_UP, and kicks off
auto-negotiation, if needed.

If however, the PHY is using interrupts, there is no polling. The phy
is stuck in PHY_UP until the next interrupt comes along. And there is
no reason for the PHY to interrupt.

Have phy_start() schedule the state machine to run, which both speeds
up the polling use case, and makes the interrupt use case actually
work.

This problems exists whenever there is a state change which will not
cause an interrupt. Trigger the state machine in these cases,
e.g. phy_error().
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Cc: Kyle Roeschley <kyle.roeschley@ni.com>
Tested-by: NKyle Roeschley <kyle.roeschley@ni.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      3c293f4e
  39. 26 8月, 2016 1 次提交
  41. 11 5月, 2016 2 次提交
  43. 19 4月, 2016 1 次提交
  45. 22 1月, 2016 2 次提交
    • F
      net: phy: Fix phy_mac_interrupt() · deccd16f
      由 Florian Fainelli 提交于 
      Commit 5ea94e76 ("phy: add phy_mac_interrupt()") to use with
PHY_IGNORE_INTERRUPT added a cancel_work_sync() into phy_mac_interrupt()
which is allowed to sleep, whereas phy_mac_interrupt() is expected to be
callable from interrupt context.

Now that we have fixed how the PHY state machine treats
PHY_IGNORE_INTERRUPT with respect to state changes, we can just set the
new link state, and queue the PHY state machine for execution so it is
going to read the new link state.

For that to work properly, we need to update phy_change() not to try to
invoke any interrupt callbacks if we have configured the PHY device for
PHY_IGNORE_INTERRUPT, because that PHY device and its driver are not
required to implement those.

Fixes: 5ea94e76 ("phy: add phy_mac_interrupt() to use with PHY_IGNORE_INTERRUPT")
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      deccd16f
    • F
      net: phy: Avoid polling PHY with PHY_IGNORE_INTERRUPTS · d5c3d846
      由 Florian Fainelli 提交于 
      Commit 2c7b4921 ("phy: fix the use of PHY_IGNORE_INTERRUPT") changed
a hunk in phy_state_machine() in the PHY_RUNNING case which was not
needed. The change essentially makes the PHY library treat PHY devices
with PHY_IGNORE_INTERRUPT to keep polling for the PHY device, even
though the intent is not to do it.

Fix this by reverting that specific hunk, which makes the PHY state
machine wait for state changes, and stay in the PHY_RUNNING state for as
long as needed.

Fixes: 2c7b4921 ("phy: fix the use of PHY_IGNORE_INTERRUPT")
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      d5c3d846
  47. 08 1月, 2016 3 次提交
  49. 04 12月, 2015 1 次提交
  51. 18 11月, 2015 1 次提交
  53. 29 8月, 2015 1 次提交