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path: root/drivers/net/phy/phylink.c
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* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2018-10-061-20/+28
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| * net: phy: phylink: fix SFP interface autodetectionBaruch Siach2018-10-051-20/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When connecting SFP PHY to phylink use the detected interface. Otherwise, the link fails to come up when the configured 'phy-mode' differs from the SFP detected mode. Move most of phylink_connect_phy() into __phylink_connect_phy(), and leave phylink_connect_phy() as a wrapper. phylink_sfp_connect_phy() can now pass the SFP detected PHY interface to __phylink_connect_phy(). This fixes 1GB SFP module link up on eth3 of the Macchiatobin board that is configured in the DT to "2500base-x" phy-mode. Fixes: 9525ae83959b6 ("phylink: add phylink infrastructure") Suggested-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: phy: Move linkmode helpers to somewhere publicAndrew Lunn2018-10-011-27/+0
| | | | | | | | | | | | | | | | | | | | phylink has some useful helpers to working with linkmode bitmaps. Move them to there own header so other code can use them. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: phy: phylink: ensure the carrier is off when starting phylinkAntoine Tenart2018-09-191-0/+3
|/ | | | | | | | | | | | | | Phylink made an assumption about the carrier state being down when calling phylink_start(). If this assumption isn't satisfied, the internal phylink state could misbehave and a net device could end up not being functional. This patch fixes this by explicitly calling netif_carrier_off() in phylink_start(). Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Acked-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* phylink: add helper for configuring 2500BaseX modesRussell King2018-08-091-0/+30
| | | | | | | | | | | | | | | | Add a helper for MAC drivers to use in their validate callback to deal with 2500BaseX vs 1000BaseX modes, where the hardware supports both but it is not possible to automatically select between them. This helper defaults to 1000BaseX, as that is the 802.3 standard, and will allow users to select 2500BaseX either by forcing the speed if AN is disabled, or by changing the advertising mask if AN is enabled. Disabling AN is not recommended as it is only the speed that we're interested in controlling, not the duplex or pause mode parameters. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: phy: phylink: Don't release NULL GPIOFlorian Fainelli2018-05-211-1/+1
| | | | | | | | | | | If CONFIG_GPIOLIB is disabled, gpiod_put() becomes a stub that produces a warning, this helped identify that we could be attempting to release a NULL pl->link_gpio GPIO descriptor, so guard against that. Fixes: daab3349ad1a ("net: phy: phylink: Release link GPIO") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: phy: phylink: Poll link GPIOsRussell King2018-05-111-0/+16
| | | | | | | | When using a fixed link with a link GPIO, we need to poll that GPIO to determine link state changes. This is consistent with what fixed_phy.c does. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: phy: phylink: Release link GPIOFlorian Fainelli2018-05-111-0/+2
| | | | | | | | | | We are not releasing the link GPIO descriptor with gpiod_put() which results in subsequent probing to get -EBUSY when calling fwnode_get_named_gpiod(). Fix this by doing the release in phylink_destroy(). Fixes: 9525ae83959b ("phylink: add phylink infrastructure") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: phy: phylink: Use gpiod_get_value_cansleep()Florian Fainelli2018-05-111-1/+1
| | | | | | | | | | The GPIO provider for the link GPIO line might require the use of the _cansleep() API, utilize that. This is safe to do since we run in workqueue context. Fixes: 9525ae83959b ("phylink: add phylink infrastructure") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfp/phylink: move module EEPROM ethtool access into netdev core ethtoolRussell King2018-03-301-28/+0
| | | | | | | | | | | | | | Provide a pointer to the SFP bus in struct net_device, so that the ethtool module EEPROM methods can access the SFP directly, rather than needing every user to provide a hook for it. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: phy: phylink: Provide PHY interface to mac_link_{up, down}Florian Fainelli2018-03-301-1/+3
| | | | | | | | | | | | | | | | In preparation for having DSA transition entirely to PHYLINK, we need to pass a PHY interface type to the mac_link_{up,down} callbacks because we may have to make decisions on that (e.g: turn on/off RGMII interfaces etc.). We do not pass an entire phylink_link_state because not all parameters (pause, duplex etc.) are defined when the link is down, only link and interface are. Update mvneta accordingly since it currently implements phylink_mac_ops. Acked-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: phy: Fix spelling mistake: "advertisment"-> "advertisement"Colin Ian King2018-03-041-6/+6
| | | | | | | Trivial fix to spelling mistake in comments and error message text. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: phylink: Remove redundant netdev.phydev assignmentRichard Cochran2018-03-011-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As a part of working on MII time stamping infrastructure, I was trying to figure out how netdev->phydev gets assigned, and I stumbled across this. Ever since the new phylink code came in, the field is assigned twice. The function, phylink_connect_phy(), calls phy_attach_direct() phylink_bringup_phy() and phy_attach_direct() sets dev->phydev = phydev; but phylink_bringup_phy() then sets the same field again: pl->netdev->phydev = phy; Similarly, the function, phylink_of_phy_connect(), calls of_phy_attach() phy_attach_direct() phylink_bringup_phy() The removal code is also duplicated: phylink_disconnect_phy() pl->netdev->phydev = NULL; phy_disconnect() phy_detach() phydev->attached_dev->phydev = NULL; This patch removes the redundant assignments, restricting manipulation of the netdev.phydev field to phy_attach_direct() and phy_detach(). Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* phylink,sfp: negotiate interface format with MACRussell King2018-02-281-14/+19
| | | | | | | | | | | | Negotiate the interface format with the MAC rather than requiring it to be a fixed type specified solely by the SFP module. This allows modules that can work with several different interface signalling formats to select a format compatible with the MAC - for example, a Fiber module supporing Gigabit ethernet and faster connected to a Gigabit only MAC needs to select the 1000BASE-X mode. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2018-01-091-2/+3
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| * phylink: mark expected switch fall-throughs in phylink_mii_ioctlGustavo A. R. Silva2018-01-081-0/+2
| | | | | | | | | | | | | | | | | | In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Addresses-Coverity-ID: 1463447 ("Missing break in switch") Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * phylink: ensure we report link down when LOS assertedRussell King2018-01-021-2/+1
| | | | | | | | | | | | | | | | | | | | Although we disable the netdev carrier, we fail to report in the kernel log that the link went down. Fix this. Fixes: 9525ae83959b ("phylink: add phylink infrastructure") Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | phylink: remove 'mode' variable from phylink_sfp_module_insert()Russell King2018-01-021-7/+8
| | | | | | | | | | | | | | | | 'mode' is actually constant through phylink_sfp_module_insert(), so remove it and replace it with the enumerated constant. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2017-12-291-0/+2
|\ \ | |/ | | | | | | | | | | | | | | | | | | net/ipv6/ip6_gre.c is a case of parallel adds. include/trace/events/tcp.h is a little bit more tricky. The removal of in-trace-macro ifdefs in 'net' paralleled with moving show_tcp_state_name and friends over to include/trace/events/sock.h in 'net-next'. Signed-off-by: David S. Miller <davem@davemloft.net>
| * phylink: ensure AN is enabledRussell King2017-12-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | Ensure that we mark AN as enabled at boot time, rather than leaving it disabled. This is noticable if your SFP module is fiber, and it supports faster speeds than 1G with 2.5G support in place. Fixes: 9525ae83959b ("phylink: add phylink infrastructure") Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * phylink: ensure the PHY interface mode is appropriately setRussell King2017-12-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | When setting the ethtool settings, ensure that the validated PHY interface mode is propagated to the current link settings, so that 2500BaseX can be selected. Fixes: 9525ae83959b ("phylink: add phylink infrastructure") Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | phylink: avoid attaching more than one PHYRussell King2017-12-211-0/+3
| | | | | | | | | | | | | | | | | | | | Attaching more than one PHY to phylink is bad news, as we store a pointer to the PHY in a single location. Error out if more than one PHY is attempted to be attached. 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>
* | phylink: fix locking assertsRussell King2017-12-181-17/+17
| | | | | | | | | | | | | | | | | | Use ASSERT_RTNL() rather than WARN_ON(!lockdep_rtnl_is_held()) which stops working when lockdep fires, and we end up with lots of warnings. Fixes: 9525ae83959b ("phylink: add phylink infrastructure") Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: phy: phylink: Handle NULL fwnode_handleFlorian Fainelli2017-12-151-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Unlike the various of_* routines to fetch properties, fwnode_* routines can have an early check against a NULL fwnode_handle reference which makes them return -EINVAL (see fwnode_call_int_op), thus making it virtually impossible to differentiate what type of error is going on. Have an early check in phylink_register_sfp() so we can keep proceeding with the initialization, there is not much we can do without a valid fwnode_handle except return early and treat this similarly to -ENOENT. Fixes: 8fa7b9b6af25 ("phylink: convert to fwnode") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: phy: phylink: Report MoCA as PORT_BNCFlorian Fainelli2017-12-131-1/+4
| | | | | | | | | | | | | | | | | | Similarly to what PHYLIB already does, make sure that PHY_INTERFACE_MODE_MOCA is reported as PORT_BNC. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: phy: phylink: Allow setting a custom link state callbackFlorian Fainelli2017-12-131-2/+32
| | | | | | | | | | | | | | | | | | | | | | phylink_get_fixed_state() currently consults an optional "link_gpio" GPIO descriptor, expand this mechanism to allow specifying a custom callback. This is necessary to support out of band link notifcation (e.g: from an interrupt within a MMIO register). Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: phy: phylink: Remove error messageFlorian Fainelli2017-12-131-3/+1
| | | | | | | | | | | | | | | | | | | | Some subsystems like DSA may be trying to connect to a PHY through OF first, and then attempt a connect using a local MDIO bus, remove the error message: "unable to find PHY node" so we can let MAC drivers whether to print it or not. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: phy: phylink: Use PHY device interface if N/AFlorian Fainelli2017-12-131-0/+6
| | | | | | | | | | | | | | | | | | We may not always be able to resolve a correct phy_interface_t value before actually connecting to the PHY device, when that happens, just have phylink_connect_phy() utilize what the PHY device/driver provided. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: phy: phylink: Allow specifying PHY device flagsFlorian Fainelli2017-12-131-2/+5
| | | | | | | | | | | | | | | | | | | | In order to let subsystems like DSA fully utilize PHYLINK, we need to be able to communicate phy_device::flags from of_phy_{connect,attach} even when using PHYLINK APIs. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* | phylink: convert to fwnodeRussell King2017-12-051-38/+53
| | | | | | | | | | | | | | | | | | | | Convert phylink to fwnode, switching phylink_create() from taking a device_node to taking a fwnode_handle. This will allow other firmware systems to take advantage of sfp/phylink support. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sfp: convert to fwnodeRussell King2017-12-051-1/+2
| | | | | | | | | | | | | | | | | | Convert sfp-bus to use fwnode rather than device_node internally, so we can support more than just device tree firmware. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | phylink: add documentation for kernel APIsRussell King2017-12-051-0/+182
| | | | | | | | | | | | | | | | | | Add kernel-doc documentation for phylink kernel APIs, and link it into the networking kapi documentation under "Network device support". Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | phylink: restart 802.3z negotiation when starting net deviceRussell King2017-12-051-0/+6
| | | | | | | | | | | | | | | | | | Restart 802.3z negotiation when the net device is brought up to ensure that the link partner has our current link modes. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | phylink: remove phylink_init_eee()Russell King2017-12-051-13/+0
| | | | | | | | | | | | | | | | phylink_init_eee() serves no purpose, remove it. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | phylink: add support for 2500baseX and 10GbaseKRRussell King2017-12-051-0/+2
| | | | | | | | | | | | | | | | | | Add support for handling the faster 2.5G and 10G link modes when used with SFP modules. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | phylink: get rid of separate Cisco SGMII and 802.3z modesRussell King2017-12-051-25/+14
| | | | | | | | | | | | | | | | | | | | Since the handling of SGMII and 802.3z is now the same, combine the MLO_AN_xxx constants into a single MLO_AN_INBAND, and use the PHY interface mode to distinguish between Cisco SGMII and 802.3z. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | phylink: merge SGMII and 802.3z handlingRussell King2017-12-051-7/+9
| | | | | | | | | | | | | | | | | | | | | | The code handling SGMII and 802.3z is essentially the same, except that we assume 802.3z has no PHY. Re-organise the code such that these cases are merged, and exclude 802.3z mode from having a PHY attached. This results in the same link handling behaviour as before. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | phy: add phy_interface_mode_is_8023z() helperRussell King2017-12-051-2/+1
|/ | | | | | | | | | Add and use phy_interface_mode_is_8023z() helper to identify the interface modes that use 802.3z negotiation. Use it in phylink's phylink_mac_an_restart(). Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* phylink: ensure we take the link down when phylink_stop() is calledRussell King2017-12-011-0/+1
| | | | | | | | | | Ensure that we tell the MAC to take the link down when phylink_stop() is called, and that this completes prior to phylink_stop() returns. Reported-by: Florian Fainelli <f.fainelli@gmail.com> Tested-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* phylink: make local function phylink_phy_change() staticWei Yongjun2017-11-041-1/+2
| | | | | | | | | | Fixes the following sparse warnings: drivers/net/phy/phylink.c:570:6: warning: symbol 'phylink_phy_change' was not declared. Should it be static? Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: phy: Cosmetic fixes to phylink/sfp/sfp-bus.cFlorian Fainelli2017-11-011-7/+6
| | | | | | | | | | | | Perform a number of stylistic changes to phylink.c, sfp.c and sfp-bus.c: - align with netdev-style comments - align function arguments to the opening parenthesis - remove blank lines - fixup a few lines over 80 columns Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* phylink: Fix an uninitialized variable bugDan Carpenter2017-08-111-1/+1
| | | | | | | | | "ret" isn't necessarily initialized here. Fixes: 9525ae83959b ("phylink: add phylink infrastructure") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* phylink: add in-band autonegotiation support for 10GBase-KR mode.Russell King2017-08-061-0/+17
| | | | | | | | Add in-band autonegotation support for 10GBase-KR mode. 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>
* phylink: add support for MII ioctl access to Clause 45 PHYsRussell King2017-08-061-33/+124
| | | | | | | | Add support for reading and writing the clause 45 MII registers. 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>
* phylink: add module EEPROM supportRussell King2017-08-061-0/+28
| | | | | | | | Add support for reading module EEPROMs through phylink. Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* sfp: add sfp-bus to bridge between network devices and sfp cagesRussell King2017-08-061-0/+157
| | | | | | 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>
* phylink: add phylink infrastructureRussell King2017-08-061-0/+1169
The link between the ethernet MAC and its PHY has become more complex as the interface evolves. This is especially true with serdes links, where the part of the PHY is effectively integrated into the MAC. Serdes links can be connected to a variety of devices, including SFF modules soldered down onto the board with the MAC, a SFP cage with a hotpluggable SFP module which may contain a PHY or directly modulate the serdes signals onto optical media with or without a PHY, or even a classical PHY connection. Moreover, the negotiation information on serdes links comes in two varieties - SGMII mode, where the PHY provides its speed/duplex/flow control information to the MAC, and 1000base-X mode where both ends exchange their abilities and each resolve the link capabilities. This means we need a more flexible means to support these arrangements, particularly with the hotpluggable nature of SFP, where the PHY can be attached or detached after the network device has been brought up. Ethtool information can come from multiple sources: - we may have a PHY operating in either SGMII or 1000base-X mode, in which case we take ethtool/mii data directly from the PHY. - we may have a optical SFP module without a PHY, with the MAC operating in 1000base-X mode - the ethtool/mii data needs to come from the MAC. - we may have a copper SFP module with a PHY whic can't be accessed, which means we need to take ethtool/mii data from the MAC. Phylink aims to solve this by providing an intermediary between the MAC and PHY, providing a safe way for PHYs to be hotplugged, and allowing a SFP driver to reconfigure the serdes connection. Phylink also takes over support of fixed link connections, where the speed/duplex/flow control are fixed, but link status may be controlled by a GPIO signal. By avoiding the fixed-phy implementation, phylink can provide a faster response to link events: fixed-phy has to wait for phylib to operate its state machine, which can take several seconds. In comparison, phylink takes milliseconds. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> - remove sync status - rework supported and advertisment handling - add 1000base-x speed for fixed links - use functionality exported from phy-core, reworking __phylink_ethtool_ksettings_set for it Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
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