Move the SFP sub-state machines out of the main state machine function,
in preparation for it doing a bit more with the device state. By doing
so, we ensure that our debug after the main state machine is always
printed.
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>
SFPs can report two different power values, the transmit power and the
receive power. Add labels to make it clear which is which. Also add
labels to the other sensors, VCC power supply, bias and module
temperature.
sensors(1) now shows:
sff2-isa-0000
Adapter: ISA adapter
VCC: +3.23 V
temperature: +33.4 C
TX_power: 276.00 uW
RX_power: 20.00 uW
bias: +0.01 A
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
The RX power read from the SFP uses units of 0.1uW. This must be
scaled to units of uW for HWMON. This requires a divide by 10, not the
current 100.
With this change in place, sensors(1) and ethtool -m agree:
sff2-isa-0000
Adapter: ISA adapter
in0: +3.23 V
temp1: +33.1 C
power1: 270.00 uW
power2: 200.00 uW
curr1: +0.01 A
Laser output power : 0.2743 mW / -5.62 dBm
Receiver signal average optical power : 0.2014 mW / -6.96 dBm
Reported-by: chris.healy@zii.aero
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Fixes: 1323061a01 ("net: phy: sfp: Add HWMON support for module sensors")
Signed-off-by: David S. Miller <davem@davemloft.net>
The acpi_node_get_property_reference() doesn't return ACPI error codes,
it just returns regular negative kernel error codes. This patch doesn't
affect run time, it's just a clean up.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Ruslan Babayev <ruslan@babayev.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
sfp_check_state can potentially be called by both a threaded IRQ handler
and delayed work. If it is concurrently called, it could result in
incorrect state management. Add a st_mutex to protect the state - this
lock gets taken outside of code that checks and handle state changes, and
the existing sm_mutex nests inside of it.
Suggested-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Robert Hancock <hancock@sedsystems.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
SFP device polling can cause problems during the shutdown process if the
parent devices of the network controller have been shut down already.
This problem was seen on the iMX6 platform with PCIe devices, where
accessing the device after the bus is shut down causes a hang.
Free any acquired GPIO interrupts and stop all delayed work in the SFP
driver during the shutdown process, so that we ensure that no pending
operations are still occurring after the SFP shutdown completes.
Signed-off-by: Robert Hancock <hancock@sedsystems.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
Some ISDN files that got removed in net-next had some changes
done in mainline, take the removals.
Signed-off-by: David S. Miller <davem@davemloft.net>
Some SFP modules do not like reads longer than 16 bytes, so read the
EEPROM in chunks of 16 bytes at a time. This behaviour is not specified
in the SFP MSAs, which specifies:
"The serial interface uses the 2-wire serial CMOS E2PROM protocol
defined for the ATMEL AT24C01A/02/04 family of components."
and
"As long as the SFP+ receives an acknowledge, it shall serially clock
out sequential data words. The sequence is terminated when the host
responds with a NACK and a STOP instead of an acknowledge."
We must avoid breaking a read across a 16-bit quantity in the diagnostic
page, thankfully all 16-bit quantities in that page are naturally
aligned.
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>
The netfilter conflicts were rather simple overlapping
changes.
However, the cls_tcindex.c stuff was a bit more complex.
On the 'net' side, Cong is fixing several races and memory
leaks. Whilst on the 'net-next' side we have Vlad adding
the rtnl-ness support.
What I've decided to do, in order to resolve this, is revert the
conversion over to using a workqueue that Cong did, bringing us back
to pure RCU. I did it this way because I believe that either Cong's
races don't apply with have Vlad did things, or Cong will have to
implement the race fix slightly differently.
Signed-off-by: David S. Miller <davem@davemloft.net>
When we probe a SFP module, we expect to be able to call the upstream
device's module_insert() function so that the upstream link can be
configured. However, when the upstream device is delayed, we currently
may end up probing the module before the upstream device is available,
and lose the module_insert() call.
Avoid this by holding off probing the module until the SFP bus is
properly connected to both the SFP socket driver and the upstream
driver.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Where the license text and the MODULE_LICENSE() value agree, convert
to using an SPDX header, removing the license text.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
The sfp_mutex variable is defined but never used in this file. Not even
in the commit that introduced that variable.
Remove sfp_mutex, it has no purpose.
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
A HWMON device is only registered is the SFP module supports the
diagnostic page and is complient to SFF8472. Don't unconditionally
unregister the hwmon device when the SFP module is remove, otherwise
we access data structures which don't exist.
Reported-by: Florian Fainelli <f.fainelli@gmail.com>
Fixes: 1323061a01 ("net: phy: sfp: Add HWMON support for module sensors")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Not all SFPs implement the registers containing sensor limits and
alarms. Luckily, there is a bit indicating if they are implemented or
not. Add checking for this bit, when deciding if the hwmon attributes
should be visible.
Fixes: 1323061a01 ("net: phy: sfp: Add HWMON support for module sensors")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Convert the state numbers, device state, etc from numbers to strings
when printing debug messages.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
SFP modules can contain a number of sensors. The EEPROM also contains
recommended alarm and critical values for each sensor, and indications
of if these have been exceeded. Export this information via
HWMON. Currently temperature, VCC, bias current, transmit power, and
possibly receiver power is supported.
The sensors in the modules can either return calibrate or uncalibrated
values. Uncalibrated values need to be manipulated, using coefficients
provided in the SFP EEPROM. Uncalibrated receive power values require
floating point maths in order to calibrate them. Performing this in
the kernel is hard. So if the SFP module indicates it uses
uncalibrated values, RX power is not made available.
With this hwmon device, it is possible to view the sensor values using
lm-sensors programs:
in0: +3.29 V (crit min = +2.90 V, min = +3.00 V)
(max = +3.60 V, crit max = +3.70 V)
temp1: +33.0°C (low = -5.0°C, high = +80.0°C)
(crit low = -10.0°C, crit = +85.0°C)
power1: 1000.00 nW (max = 794.00 uW, min = 50.00 uW) ALARM (LCRIT)
(lcrit = 40.00 uW, crit = 1000.00 uW)
curr1: +0.00 A (crit min = +0.00 A, min = +0.00 A) ALARM (LCRIT, MIN)
(max = +0.01 A, crit max = +0.01 A)
The scaling sensors performs on the bias current is not particularly
good. The raw values are more useful:
curr1:
curr1_input: 0.000
curr1_min: 0.002
curr1_max: 0.010
curr1_lcrit: 0.000
curr1_crit: 0.011
curr1_min_alarm: 1.000
curr1_max_alarm: 0.000
curr1_lcrit_alarm: 1.000
curr1_crit_alarm: 0.000
In order to keep the I2C overhead to a minimum, the constant values,
such as limits and calibration coefficients are read once at module
insertion time. Thus only reading *_input and *_alarm properties
requires i2c read operations.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch makes the i2c-bus property mandatory when using a device
tree. If the sfp i2c bus isn't described it's impossible to guess the
protocol to use for a given module, and the sfp module would then not
work in most cases.
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In case no Tx disable pin is available the SFP modules will always be
emitting. This could be an issue when using modules using laser as their
light source as we would have no way to disable it when the fiber is
removed. This patch adds a warning when registering an SFP cage which do
not have its tx_disable pin wired or available.
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>
Cotsworks modules fail the checksums - it appears that Cotsworks
reprograms the EEPROM at the end of production with the final product
information (serial, date code, and exact part number for module
options) and fails to update the checksum.
Work around this by detecting the Cotsworks name in the manufacturer
field, and reducing the checksum failures to warnings rather than a
hard error.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch is the result of work by both Jon Nettleton and Russell King.
Jon wrote the original patch, adding support for SFP modules which
require a power level greater than '1'.
Russell's changes:
- Fix the power levels for big-endian, and make the code flow better.
- Convert to use device_property_read_u8()
- Warn for power levels exceeding host level
SFF-8431 says:
"To avoid exceeding system power supply limits and cooling capacity,
all modules at power up by default shall operate with up to 1.0 W.
Hosts supporting Power Level II or III operation may enable a Power
Level II or III module through the 2-wire interface. Power Level II
or III modules shall assert the power level declaration bit of
SFF-8472."
Print a warning for modules that exceed the host power level, and
leave them operating in power level 1.
- Fix i2c write
The first byte of any write after the bus address is always the
device address. In order to write a value to device D, address I,
value V, we need to generate on the bus:
S DDDDDDDD A IIIIIIII A VVVVVVVV A P
where S = start, R = restart, A = ack, P = stop. Splitting this
as two:
S DDDDDDDD A IIIIIIII A R DDDDDDDD A VVVVVVVV A P
results in the device's address register being written first by I
and then by V - the addressed register within the device is not
written.
- Avoid power mode switching if 0xa2 is not implemented
Some modules indicate that they support power level II or power level
III, but do not implement address 0xa2, meaning that the bit to set
them to high power mode is not accessible.
These modules appear to have the sff8472_compliance field set to zero,
and also do not implement diagnostics. Detect this, but also ensure
that the module does not require the address switching mode, which we
do not implement.
- Use mW for power level rather than power level number.
- Fix high power mode transition
We must not switch to SFP_MOD_PRESENT state until we have finished
initialising, because the remaining state machines check for that
state. Add SFP_MOD_HPOWER as an intermediate state.
- Use definition for I2C register address rather than constant.
Signed-off-by: Jon Nettleton <jon@solid-run.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Rather than memcpy()'ing the strings and null terminate them, printf
allows non-NULL terminated strings provided the precision is not more
than the size of the buffer. Use this form to print the basic module
information rather than copying and terminating the strings.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
The EEPROM reading was trying to read from the second EEPROM address
if we requested the last byte from the SFF8079 EEPROM, which caused a
failure when the second EEPROM is not present. Discovered with a
S-RJ01 SFP module. Fix this.
Fixes: 7397005545 ("sfp: add SFP module support")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
The detection of a PHY changed in commit e98a3aabf8 ("mdio_bus: don't
return NULL from mdiobus_scan()") which now causes sfp to print an
error message. Update for this change.
Fixes: 7397005545 ("sfp: add SFP module support")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add support for SFF modules, which are soldered down SFP modules.
These have a different phys_id value, and also have the present and
rate select signals omitted compared with their socketed counter-parts.
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>
We do not support SFP modules which require the address change sequence
as detailed by SFF 8472 revision 1.22 section 8.9. Warn when these
modules are inserted, and treat them as SFF8079 modules for ethtool.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
There are two bits in the option word for the RX_LOS signal. One
reports that the RX_LOS signal is active high, the other reports that
it is active low. When both or neither are set, the result is not
well defined in the specification.
Rather than assuming that neither set means normal RX_LOS, take this
as meaning no RX_LOS signal available, thereby ignoring the signal.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
The options word is a be16 quantity, so we need to test the flags
having converted the endian-ness. Convert the flag bits to be16,
which can be optimised by the compiler, rather than converting a
variable at runtime.
Reported-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>
include/gpio.h does not contain the references we want, we should be including
linux/gpio/consumer.h instead.
Fixes: 7397005545 ("sfp: add SFP module support")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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>
Make the Rx rate select control gpio property name match the documented
binding. This would make the addition of 'rate-select1-gpios' for SFP+
support more natural.
Also, make the MOD-DEF0 gpio property name match the documentation.
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add support for SFP hotpluggable modules via sfp-bus and phylink.
This supports both copper and optical SFP modules, which require
different Serdes modes in order to properly negotiate the link.
Optical SFP modules typically require the Serdes link to be talking
1000BaseX mode - this is the gigabit ethernet mode defined by the
802.3 standard.
Copper SFP modules typically integrate a PHY in the module to convert
from Serdes to copper, and the PHY will be configured by the vendor
to either present a 1000BaseX Serdes link (for fixed 1000BaseT) or a
SGMII Serdes link. However, this is vendor defined, so we instead
detect the PHY, switch the link to SGMII mode, and use traditional
PHY based negotiation.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
